hpsa.c 278.4 KB
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/*
 *    Disk Array driver for HP Smart Array SAS controllers
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 *    Copyright 2016 Microsemi Corporation
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 *    Copyright 2014-2015 PMC-Sierra, Inc.
 *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
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 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; version 2 of the License.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
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 *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
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 *
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
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#include <linux/pci-aspm.h>
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#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/blktrace_api.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/completion.h>
#include <linux/moduleparam.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_transport_sas.h>
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#include <scsi/scsi_dbg.h>
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#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
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#include <linux/atomic.h>
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#include <linux/jiffies.h>
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#include <linux/percpu-defs.h>
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#include <linux/percpu.h>
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#include <asm/unaligned.h>
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#include <asm/div64.h>
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#include "hpsa_cmd.h"
#include "hpsa.h"

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/*
 * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
 * with an optional trailing '-' followed by a byte value (0-255).
 */
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#define HPSA_DRIVER_VERSION "3.4.16-0"
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#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
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#define HPSA "hpsa"
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/* How long to wait for CISS doorbell communication */
#define CLEAR_EVENT_WAIT_INTERVAL 20	/* ms for each msleep() call */
#define MODE_CHANGE_WAIT_INTERVAL 10	/* ms for each msleep() call */
#define MAX_CLEAR_EVENT_WAIT 30000	/* times 20 ms = 600 s */
#define MAX_MODE_CHANGE_WAIT 2000	/* times 10 ms = 20 s */
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#define MAX_IOCTL_CONFIG_WAIT 1000

/*define how many times we will try a command because of bus resets */
#define MAX_CMD_RETRIES 3

/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
	HPSA_DRIVER_VERSION);
MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
MODULE_VERSION(HPSA_DRIVER_VERSION);
MODULE_LICENSE("GPL");

static int hpsa_allow_any;
module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_allow_any,
		"Allow hpsa driver to access unknown HP Smart Array hardware");
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static int hpsa_simple_mode;
module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_simple_mode,
	"Use 'simple mode' rather than 'performant mode'");
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/* define the PCI info for the cards we can control */
static const struct pci_device_id hpsa_pci_device_id[] = {
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
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	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
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	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
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	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
	{PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
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	{PCI_VENDOR_ID_HP,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
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		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
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	{0,}
};

MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);

/*  board_id = Subsystem Device ID & Vendor ID
 *  product = Marketing Name for the board
 *  access = Address of the struct of function pointers
 */
static struct board_type products[] = {
	{0x3241103C, "Smart Array P212", &SA5_access},
	{0x3243103C, "Smart Array P410", &SA5_access},
	{0x3245103C, "Smart Array P410i", &SA5_access},
	{0x3247103C, "Smart Array P411", &SA5_access},
	{0x3249103C, "Smart Array P812", &SA5_access},
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	{0x324A103C, "Smart Array P712m", &SA5_access},
	{0x324B103C, "Smart Array P711m", &SA5_access},
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	{0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
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	{0x3350103C, "Smart Array P222", &SA5_access},
	{0x3351103C, "Smart Array P420", &SA5_access},
	{0x3352103C, "Smart Array P421", &SA5_access},
	{0x3353103C, "Smart Array P822", &SA5_access},
	{0x3354103C, "Smart Array P420i", &SA5_access},
	{0x3355103C, "Smart Array P220i", &SA5_access},
	{0x3356103C, "Smart Array P721m", &SA5_access},
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	{0x1921103C, "Smart Array P830i", &SA5_access},
	{0x1922103C, "Smart Array P430", &SA5_access},
	{0x1923103C, "Smart Array P431", &SA5_access},
	{0x1924103C, "Smart Array P830", &SA5_access},
	{0x1926103C, "Smart Array P731m", &SA5_access},
	{0x1928103C, "Smart Array P230i", &SA5_access},
	{0x1929103C, "Smart Array P530", &SA5_access},
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	{0x21BD103C, "Smart Array P244br", &SA5_access},
	{0x21BE103C, "Smart Array P741m", &SA5_access},
	{0x21BF103C, "Smart HBA H240ar", &SA5_access},
	{0x21C0103C, "Smart Array P440ar", &SA5_access},
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	{0x21C1103C, "Smart Array P840ar", &SA5_access},
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	{0x21C2103C, "Smart Array P440", &SA5_access},
	{0x21C3103C, "Smart Array P441", &SA5_access},
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	{0x21C4103C, "Smart Array", &SA5_access},
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	{0x21C5103C, "Smart Array P841", &SA5_access},
	{0x21C6103C, "Smart HBA H244br", &SA5_access},
	{0x21C7103C, "Smart HBA H240", &SA5_access},
	{0x21C8103C, "Smart HBA H241", &SA5_access},
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	{0x21C9103C, "Smart Array", &SA5_access},
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	{0x21CA103C, "Smart Array P246br", &SA5_access},
	{0x21CB103C, "Smart Array P840", &SA5_access},
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	{0x21CC103C, "Smart Array", &SA5_access},
	{0x21CD103C, "Smart Array", &SA5_access},
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	{0x21CE103C, "Smart HBA", &SA5_access},
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	{0x05809005, "SmartHBA-SA", &SA5_access},
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	{0x05819005, "SmartHBA-SA 8i", &SA5_access},
	{0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
	{0x05839005, "SmartHBA-SA 8e", &SA5_access},
	{0x05849005, "SmartHBA-SA 16i", &SA5_access},
	{0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
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	{0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
	{0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
	{0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
	{0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
	{0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
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	{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};

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static struct scsi_transport_template *hpsa_sas_transport_template;
static int hpsa_add_sas_host(struct ctlr_info *h);
static void hpsa_delete_sas_host(struct ctlr_info *h);
static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
			struct hpsa_scsi_dev_t *device);
static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
static struct hpsa_scsi_dev_t
	*hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
		struct sas_rphy *rphy);

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#define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
static const struct scsi_cmnd hpsa_cmd_busy;
#define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
static const struct scsi_cmnd hpsa_cmd_idle;
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static int number_of_controllers;

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static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
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static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
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#ifdef CONFIG_COMPAT
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static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
	void __user *arg);
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#endif

static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
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static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
					    struct scsi_cmnd *scmd);
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static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
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	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
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	int cmd_type);
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static void hpsa_free_cmd_pool(struct ctlr_info *h);
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#define VPD_PAGE (1 << 8)
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#define HPSA_SIMPLE_ERROR_BITS 0x03
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static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
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static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time);
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static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
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static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_slave_alloc(struct scsi_device *sdev);
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static int hpsa_slave_configure(struct scsi_device *sdev);
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static void hpsa_slave_destroy(struct scsi_device *sdev);

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static void hpsa_update_scsi_devices(struct ctlr_info *h);
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static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
static void check_ioctl_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
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/* performant mode helper functions */
static void calc_bucket_map(int *bucket, int num_buckets,
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	int nsgs, int min_blocks, u32 *bucket_map);
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static void hpsa_free_performant_mode(struct ctlr_info *h);
static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
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static inline u32 next_command(struct ctlr_info *h, u8 q);
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static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset);
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar);
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
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static int wait_for_device_to_become_ready(struct ctlr_info *h,
					   unsigned char lunaddr[],
					   int reply_queue);
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static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready);
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static inline void finish_cmd(struct CommandList *c);
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static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
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#define BOARD_NOT_READY 0
#define BOARD_READY 1
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static void hpsa_drain_accel_commands(struct ctlr_info *h);
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static void hpsa_flush_cache(struct ctlr_info *h);
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static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
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	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
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static void hpsa_command_resubmit_worker(struct work_struct *work);
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static u32 lockup_detected(struct ctlr_info *h);
static int detect_controller_lockup(struct ctlr_info *h);
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static void hpsa_disable_rld_caching(struct ctlr_info *h);
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static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
	struct ReportExtendedLUNdata *buf, int bufsize);
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static bool hpsa_vpd_page_supported(struct ctlr_info *h,
	unsigned char scsi3addr[], u8 page);
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static int hpsa_luns_changed(struct ctlr_info *h);
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static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
			       struct hpsa_scsi_dev_t *dev,
			       unsigned char *scsi3addr);
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static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
{
	unsigned long *priv = shost_priv(sdev->host);
	return (struct ctlr_info *) *priv;
}

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static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
{
	unsigned long *priv = shost_priv(sh);
	return (struct ctlr_info *) *priv;
}

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static inline bool hpsa_is_cmd_idle(struct CommandList *c)
{
	return c->scsi_cmd == SCSI_CMD_IDLE;
}

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static inline bool hpsa_is_pending_event(struct CommandList *c)
{
	return c->abort_pending || c->reset_pending;
}

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/* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
static void decode_sense_data(const u8 *sense_data, int sense_data_len,
			u8 *sense_key, u8 *asc, u8 *ascq)
{
	struct scsi_sense_hdr sshdr;
	bool rc;

	*sense_key = -1;
	*asc = -1;
	*ascq = -1;

	if (sense_data_len < 1)
		return;

	rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
	if (rc) {
		*sense_key = sshdr.sense_key;
		*asc = sshdr.asc;
		*ascq = sshdr.ascq;
	}
}

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static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
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	u8 sense_key, asc, ascq;
	int sense_len;

	if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
		sense_len = sizeof(c->err_info->SenseInfo);
	else
		sense_len = c->err_info->SenseLen;

	decode_sense_data(c->err_info->SenseInfo, sense_len,
				&sense_key, &asc, &ascq);
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	if (sense_key != UNIT_ATTENTION || asc == 0xff)
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		return 0;

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	switch (asc) {
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	case STATE_CHANGED:
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		dev_warn(&h->pdev->dev,
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			"%s: a state change detected, command retried\n",
			h->devname);
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		break;
	case LUN_FAILED:
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		dev_warn(&h->pdev->dev,
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			"%s: LUN failure detected\n", h->devname);
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		break;
	case REPORT_LUNS_CHANGED:
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		dev_warn(&h->pdev->dev,
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			"%s: report LUN data changed\n", h->devname);
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	/*
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	 * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
	 * target (array) devices.
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	 */
		break;
	case POWER_OR_RESET:
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		dev_warn(&h->pdev->dev,
			"%s: a power on or device reset detected\n",
			h->devname);
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		break;
	case UNIT_ATTENTION_CLEARED:
390 391 392
		dev_warn(&h->pdev->dev,
			"%s: unit attention cleared by another initiator\n",
			h->devname);
393 394
		break;
	default:
395 396 397
		dev_warn(&h->pdev->dev,
			"%s: unknown unit attention detected\n",
			h->devname);
398 399 400 401 402
		break;
	}
	return 1;
}

403 404 405 406 407 408 409 410 411 412
static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
{
	if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
		(c->err_info->ScsiStatus != SAM_STAT_BUSY &&
		 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
		return 0;
	dev_warn(&h->pdev->dev, HPSA "device busy");
	return 1;
}

413 414 415 416 417 418 419 420 421 422 423 424 425 426
static u32 lockup_detected(struct ctlr_info *h);
static ssize_t host_show_lockup_detected(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int ld;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	ld = lockup_detected(h);

	return sprintf(buf, "ld=%d\n", ld);
}

427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int status, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &status) != 1)
		return -EINVAL;
	h = shost_to_hba(shost);
	h->acciopath_status = !!status;
	dev_warn(&h->pdev->dev,
		"hpsa: HP SSD Smart Path %s via sysfs update.\n",
		h->acciopath_status ? "enabled" : "disabled");
	return count;
}

451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
static ssize_t host_store_raid_offload_debug(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int debug_level, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &debug_level) != 1)
		return -EINVAL;
	if (debug_level < 0)
		debug_level = 0;
	h = shost_to_hba(shost);
	h->raid_offload_debug = debug_level;
	dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
		h->raid_offload_debug);
	return count;
}

476 477 478 479 480 481
static ssize_t host_store_rescan(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
482
	h = shost_to_hba(shost);
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	hpsa_scan_start(h->scsi_host);
484 485 486
	return count;
}

487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
static ssize_t host_show_firmware_revision(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	unsigned char *fwrev;

	h = shost_to_hba(shost);
	if (!h->hba_inquiry_data)
		return 0;
	fwrev = &h->hba_inquiry_data[32];
	return snprintf(buf, 20, "%c%c%c%c\n",
		fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
}

502 503 504 505 506 507
static ssize_t host_show_commands_outstanding(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct ctlr_info *h = shost_to_hba(shost);

508 509
	return snprintf(buf, 20, "%d\n",
			atomic_read(&h->commands_outstanding));
510 511
}

512 513 514 515 516 517 518 519
static ssize_t host_show_transport_mode(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%s\n",
520
		h->transMethod & CFGTBL_Trans_Performant ?
521 522 523
			"performant" : "simple");
}

524 525 526 527 528 529 530 531 532 533 534
static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 30, "HP SSD Smart Path %s\n",
		(h->acciopath_status == 1) ?  "enabled" : "disabled");
}

535
/* List of controllers which cannot be hard reset on kexec with reset_devices */
536 537
static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
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	0x324b103C, /* Smart Array P711m */
539 540 541 542 543 544 545 546 547 548
	0x3223103C, /* Smart Array P800 */
	0x3234103C, /* Smart Array P400 */
	0x3235103C, /* Smart Array P400i */
	0x3211103C, /* Smart Array E200i */
	0x3212103C, /* Smart Array E200 */
	0x3213103C, /* Smart Array E200i */
	0x3214103C, /* Smart Array E200i */
	0x3215103C, /* Smart Array E200i */
	0x3237103C, /* Smart Array E500 */
	0x323D103C, /* Smart Array P700m */
549
	0x40800E11, /* Smart Array 5i */
550 551
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
552 553 554 555 556 557
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
558 559
};

560 561
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
562
	0x40800E11, /* Smart Array 5i */
563 564 565 566 567 568
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
569 570 571 572 573 574 575 576 577 578 579
	/* Exclude 640x boards.  These are two pci devices in one slot
	 * which share a battery backed cache module.  One controls the
	 * cache, the other accesses the cache through the one that controls
	 * it.  If we reset the one controlling the cache, the other will
	 * likely not be happy.  Just forbid resetting this conjoined mess.
	 * The 640x isn't really supported by hpsa anyway.
	 */
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
};

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static u32 needs_abort_tags_swizzled[] = {
	0x323D103C, /* Smart Array P700m */
	0x324a103C, /* Smart Array P712m */
	0x324b103C, /* SmartArray P711m */
};

static int board_id_in_array(u32 a[], int nelems, u32 board_id)
587 588 589
{
	int i;

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	for (i = 0; i < nelems; i++)
		if (a[i] == board_id)
			return 1;
	return 0;
594 595
}

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596
static int ctlr_is_hard_resettable(u32 board_id)
597
{
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598 599 600
	return !board_id_in_array(unresettable_controller,
			ARRAY_SIZE(unresettable_controller), board_id);
}
601

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602 603 604 605
static int ctlr_is_soft_resettable(u32 board_id)
{
	return !board_id_in_array(soft_unresettable_controller,
			ARRAY_SIZE(soft_unresettable_controller), board_id);
606 607
}

608 609 610 611 612 613
static int ctlr_is_resettable(u32 board_id)
{
	return ctlr_is_hard_resettable(board_id) ||
		ctlr_is_soft_resettable(board_id);
}

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614 615 616 617 618 619
static int ctlr_needs_abort_tags_swizzled(u32 board_id)
{
	return board_id_in_array(needs_abort_tags_swizzled,
			ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
}

620 621 622 623 624 625 626
static ssize_t host_show_resettable(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
627
	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
628 629
}

630 631 632 633 634
static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
{
	return (scsi3addr[3] & 0xC0) == 0x40;
}

635
static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
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	"1(+0)ADM", "UNKNOWN", "PHYS DRV"
637
};
638 639 640 641 642 643 644
#define HPSA_RAID_0	0
#define HPSA_RAID_4	1
#define HPSA_RAID_1	2	/* also used for RAID 10 */
#define HPSA_RAID_5	3	/* also used for RAID 50 */
#define HPSA_RAID_51	4
#define HPSA_RAID_6	5	/* also used for RAID 60 */
#define HPSA_RAID_ADM	6	/* also used for RAID 1+0 ADM */
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#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
#define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
647

648 649 650 651
static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
{
	return !device->physical_device;
}
652 653 654 655 656

static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
657
	unsigned char rlevel;
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}

	/* Is this even a logical drive? */
673
	if (!is_logical_device(hdev)) {
674 675 676 677 678 679 680
		spin_unlock_irqrestore(&h->lock, flags);
		l = snprintf(buf, PAGE_SIZE, "N/A\n");
		return l;
	}

	rlevel = hdev->raid_level;
	spin_unlock_irqrestore(&h->lock, flags);
681
	if (rlevel > RAID_UNKNOWN)
682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
		rlevel = RAID_UNKNOWN;
	l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
	return l;
}

static ssize_t lunid_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char lunid[8];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
	spin_unlock_irqrestore(&h->lock, flags);
706
	return snprintf(buf, 20, "0x%8phN\n", lunid);
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
}

static ssize_t unique_id_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char sn[16];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(sn, hdev->device_id, sizeof(sn));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 16 * 2 + 2,
			"%02X%02X%02X%02X%02X%02X%02X%02X"
			"%02X%02X%02X%02X%02X%02X%02X%02X\n",
			sn[0], sn[1], sn[2], sn[3],
			sn[4], sn[5], sn[6], sn[7],
			sn[8], sn[9], sn[10], sn[11],
			sn[12], sn[13], sn[14], sn[15]);
}

737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759
static ssize_t sas_address_show(struct device *dev,
	      struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	u64 sas_address;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	sas_address = hdev->sas_address;
	spin_unlock_irqrestore(&h->lock, flags);

	return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
}

760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781
static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int offload_enabled;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	offload_enabled = hdev->offload_enabled;
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "%d\n", offload_enabled);
}

782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816
#define MAX_PATHS 8
static ssize_t path_info_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int i;
	int output_len = 0;
	u8 box;
	u8 bay;
	u8 path_map_index = 0;
	char *active;
	unsigned char phys_connector[2];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->devlock, flags);
		return -ENODEV;
	}

	bay = hdev->bay;
	for (i = 0; i < MAX_PATHS; i++) {
		path_map_index = 1<<i;
		if (i == hdev->active_path_index)
			active = "Active";
		else if (hdev->path_map & path_map_index)
			active = "Inactive";
		else
			continue;

817 818 819
		output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len,
				"[%d:%d:%d:%d] %20.20s ",
820 821 822 823
				h->scsi_host->host_no,
				hdev->bus, hdev->target, hdev->lun,
				scsi_device_type(hdev->devtype));

824
		if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
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			output_len += scnprintf(buf + output_len,
826 827
						PAGE_SIZE - output_len,
						"%s\n", active);
828 829 830 831 832 833 834 835 836 837
			continue;
		}

		box = hdev->box[i];
		memcpy(&phys_connector, &hdev->phys_connector[i],
			sizeof(phys_connector));
		if (phys_connector[0] < '0')
			phys_connector[0] = '0';
		if (phys_connector[1] < '0')
			phys_connector[1] = '0';
838
		output_len += scnprintf(buf + output_len,
839
				PAGE_SIZE - output_len,
840 841
				"PORT: %.2s ",
				phys_connector);
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842 843
		if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
			hdev->expose_device) {
844
			if (box == 0 || box == 0xFF) {
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845
				output_len += scnprintf(buf + output_len,
846
					PAGE_SIZE - output_len,
847 848 849
					"BAY: %hhu %s\n",
					bay, active);
			} else {
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850
				output_len += scnprintf(buf + output_len,
851
					PAGE_SIZE - output_len,
852 853 854 855
					"BOX: %hhu BAY: %hhu %s\n",
					box, bay, active);
			}
		} else if (box != 0 && box != 0xFF) {
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			output_len += scnprintf(buf + output_len,
857
				PAGE_SIZE - output_len, "BOX: %hhu %s\n",
858 859
				box, active);
		} else
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			output_len += scnprintf(buf + output_len,
861
				PAGE_SIZE - output_len, "%s\n", active);
862 863 864
	}

	spin_unlock_irqrestore(&h->devlock, flags);
865
	return output_len;
866 867
}

868 869 870 871 872 873 874 875 876 877
static ssize_t host_show_ctlr_num(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%d\n", h->ctlr);
}

878 879 880 881
static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
882
static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
883 884
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
			host_show_hp_ssd_smart_path_enabled, NULL);
885
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
886 887 888
static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
		host_show_hp_ssd_smart_path_status,
		host_store_hp_ssd_smart_path_status);
889 890
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
			host_store_raid_offload_debug);
891 892 893 894 895 896
static DEVICE_ATTR(firmware_revision, S_IRUGO,
	host_show_firmware_revision, NULL);
static DEVICE_ATTR(commands_outstanding, S_IRUGO,
	host_show_commands_outstanding, NULL);
static DEVICE_ATTR(transport_mode, S_IRUGO,
	host_show_transport_mode, NULL);
897 898
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
899 900
static DEVICE_ATTR(lockup_detected, S_IRUGO,
	host_show_lockup_detected, NULL);
901 902
static DEVICE_ATTR(ctlr_num, S_IRUGO,
	host_show_ctlr_num, NULL);
903 904 905 906 907

static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
908
	&dev_attr_hp_ssd_smart_path_enabled,
909
	&dev_attr_path_info,
910
	&dev_attr_sas_address,
911 912 913 914 915 916 917 918
	NULL,
};

static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
919
	&dev_attr_resettable,
920
	&dev_attr_hp_ssd_smart_path_status,
921
	&dev_attr_raid_offload_debug,
922
	&dev_attr_lockup_detected,
923
	&dev_attr_ctlr_num,
924 925 926
	NULL,
};

927 928 929
#define HPSA_NRESERVED_CMDS	(HPSA_CMDS_RESERVED_FOR_ABORTS + \
		HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)

930 931
static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
932 933
	.name			= HPSA,
	.proc_name		= HPSA,
934 935 936
	.queuecommand		= hpsa_scsi_queue_command,
	.scan_start		= hpsa_scan_start,
	.scan_finished		= hpsa_scan_finished,
D
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937
	.change_queue_depth	= hpsa_change_queue_depth,
938 939
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
940
	.eh_abort_handler	= hpsa_eh_abort_handler,
941 942 943
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
944
	.slave_configure	= hpsa_slave_configure,
945 946 947 948 949 950
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
951
	.max_sectors = 8192,
952
	.no_write_same = 1,
953 954
};

955
static inline u32 next_command(struct ctlr_info *h, u8 q)
956 957
{
	u32 a;
958
	struct reply_queue_buffer *rq = &h->reply_queue[q];
959

960 961 962
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return h->access.command_completed(h, q);

963
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
964
		return h->access.command_completed(h, q);
965

966 967 968
	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
969
		atomic_dec(&h->commands_outstanding);
970 971 972 973
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
974 975 976
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
977 978 979 980
	}
	return a;
}

981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
/*
 * There are some special bits in the bus address of the
 * command that we have to set for the controller to know
 * how to process the command:
 *
 * Normal performant mode:
 * bit 0: 1 means performant mode, 0 means simple mode.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 0)
 *
 * ioaccel1 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 110)
 * (command type is needed because ioaccel1 mode
 * commands are submitted through the same register as normal
 * mode commands, so this is how the controller knows whether
 * the command is normal mode or ioaccel1 mode.)
 *
 * ioaccel2 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-4 = block fetch table entry (note extra bit)
 * bits 4-6 = not needed, because ioaccel2 mode has
 * a separate special register for submitting commands.
 */

1007 1008
/*
 * set_performant_mode: Modify the tag for cciss performant
1009 1010 1011
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */
1012 1013 1014
#define DEFAULT_REPLY_QUEUE (-1)
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
					int reply_queue)
1015
{
1016
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1017
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1018
		if (unlikely(!h->msix_vectors))
1019 1020
			return;
		if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1021
			c->Header.ReplyQueue =
1022
				raw_smp_processor_id() % h->nreply_queues;
1023 1024
		else
			c->Header.ReplyQueue = reply_queue % h->nreply_queues;
1025
	}
1026 1027
}

1028
static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1029 1030
						struct CommandList *c,
						int reply_queue)
1031 1032 1033
{
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];

1034 1035
	/*
	 * Tell the controller to post the reply to the queue for this
1036 1037
	 * processor.  This seems to give the best I/O throughput.
	 */
1038 1039 1040 1041 1042 1043
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
	else
		cp->ReplyQueue = reply_queue % h->nreply_queues;
	/*
	 * Set the bits in the address sent down to include:
1044 1045 1046 1047 1048 1049 1050 1051
	 *  - performant mode bit (bit 0)
	 *  - pull count (bits 1-3)
	 *  - command type (bits 4-6)
	 */
	c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
					IOACCEL1_BUSADDR_CMDTYPE;
}

1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
						struct CommandList *c,
						int reply_queue)
{
	struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
		&h->ioaccel2_cmd_pool[c->cmdindex];

	/* Tell the controller to post the reply to the queue for this
	 * processor.  This seems to give the best I/O throughput.
	 */
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->reply_queue = smp_processor_id() % h->nreply_queues;
	else
		cp->reply_queue = reply_queue % h->nreply_queues;
	/* Set the bits in the address sent down to include:
	 *  - performant mode bit not used in ioaccel mode 2
	 *  - pull count (bits 0-3)
	 *  - command type isn't needed for ioaccel2
	 */
	c->busaddr |= h->ioaccel2_blockFetchTable[0];
}

1074
static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1075 1076
						struct CommandList *c,
						int reply_queue)
1077 1078 1079
{
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];

1080 1081
	/*
	 * Tell the controller to post the reply to the queue for this
1082 1083
	 * processor.  This seems to give the best I/O throughput.
	 */
1084 1085 1086 1087 1088 1089
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->reply_queue = smp_processor_id() % h->nreply_queues;
	else
		cp->reply_queue = reply_queue % h->nreply_queues;
	/*
	 * Set the bits in the address sent down to include:
1090 1091 1092 1093 1094 1095 1096
	 *  - performant mode bit not used in ioaccel mode 2
	 *  - pull count (bits 0-3)
	 *  - command type isn't needed for ioaccel2
	 */
	c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
}

1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125
static int is_firmware_flash_cmd(u8 *cdb)
{
	return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
}

/*
 * During firmware flash, the heartbeat register may not update as frequently
 * as it should.  So we dial down lockup detection during firmware flash. and
 * dial it back up when firmware flash completes.
 */
#define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
#define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
		struct CommandList *c)
{
	if (!is_firmware_flash_cmd(c->Request.CDB))
		return;
	atomic_inc(&h->firmware_flash_in_progress);
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
}

static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
		struct CommandList *c)
{
	if (is_firmware_flash_cmd(c->Request.CDB) &&
		atomic_dec_and_test(&h->firmware_flash_in_progress))
		h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
}

1126 1127
static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c, int reply_queue)
1128
{
1129 1130
	dial_down_lockup_detection_during_fw_flash(h, c);
	atomic_inc(&h->commands_outstanding);
1131 1132
	switch (c->cmd_type) {
	case CMD_IOACCEL1:
1133
		set_ioaccel1_performant_mode(h, c, reply_queue);
1134
		writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1135 1136
		break;
	case CMD_IOACCEL2:
1137
		set_ioaccel2_performant_mode(h, c, reply_queue);
1138
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1139
		break;
1140 1141 1142 1143
	case IOACCEL2_TMF:
		set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
		break;
1144
	default:
1145
		set_performant_mode(h, c, reply_queue);
1146
		h->access.submit_command(h, c);
1147
	}
1148 1149
}

1150
static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1151
{
W
Webb Scales 已提交
1152
	if (unlikely(hpsa_is_pending_event(c)))
1153 1154
		return finish_cmd(c);

1155 1156 1157
	__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
static inline int is_hba_lunid(unsigned char scsi3addr[])
{
	return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
}

static inline int is_scsi_rev_5(struct ctlr_info *h)
{
	if (!h->hba_inquiry_data)
		return 0;
	if ((h->hba_inquiry_data[2] & 0x07) == 5)
		return 1;
	return 0;
}

1172 1173 1174 1175 1176 1177 1178
static int hpsa_find_target_lun(struct ctlr_info *h,
	unsigned char scsi3addr[], int bus, int *target, int *lun)
{
	/* finds an unused bus, target, lun for a new physical device
	 * assumes h->devlock is held
	 */
	int i, found = 0;
1179
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1180

1181
	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1182 1183 1184

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1185
			__set_bit(h->dev[i]->target, lun_taken);
1186 1187
	}

1188 1189 1190 1191 1192 1193
	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
1194 1195 1196 1197
	}
	return !found;
}

D
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1198
static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1199 1200
	struct hpsa_scsi_dev_t *dev, char *description)
{
D
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1201 1202 1203
#define LABEL_SIZE 25
	char label[LABEL_SIZE];

1204 1205 1206
	if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
		return;

D
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1207 1208 1209 1210 1211 1212 1213 1214
	switch (dev->devtype) {
	case TYPE_RAID:
		snprintf(label, LABEL_SIZE, "controller");
		break;
	case TYPE_ENCLOSURE:
		snprintf(label, LABEL_SIZE, "enclosure");
		break;
	case TYPE_DISK:
D
Don Brace 已提交
1215
	case TYPE_ZBC:
D
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1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
		if (dev->external)
			snprintf(label, LABEL_SIZE, "external");
		else if (!is_logical_dev_addr_mode(dev->scsi3addr))
			snprintf(label, LABEL_SIZE, "%s",
				raid_label[PHYSICAL_DRIVE]);
		else
			snprintf(label, LABEL_SIZE, "RAID-%s",
				dev->raid_level > RAID_UNKNOWN ? "?" :
				raid_label[dev->raid_level]);
		break;
	case TYPE_ROM:
		snprintf(label, LABEL_SIZE, "rom");
		break;
	case TYPE_TAPE:
		snprintf(label, LABEL_SIZE, "tape");
		break;
	case TYPE_MEDIUM_CHANGER:
		snprintf(label, LABEL_SIZE, "changer");
		break;
	default:
		snprintf(label, LABEL_SIZE, "UNKNOWN");
		break;
	}

1240
	dev_printk(level, &h->pdev->dev,
D
Don Brace 已提交
1241
			"scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1242 1243 1244 1245 1246
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
			description,
			scsi_device_type(dev->devtype),
			dev->vendor,
			dev->model,
D
Don Brace 已提交
1247
			label,
1248 1249
			dev->offload_config ? '+' : '-',
			dev->offload_enabled ? '+' : '-',
1250
			dev->expose_device);
1251 1252
}

1253
/* Add an entry into h->dev[] array. */
D
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1254
static int hpsa_scsi_add_entry(struct ctlr_info *h,
1255 1256 1257 1258 1259 1260 1261 1262 1263
		struct hpsa_scsi_dev_t *device,
		struct hpsa_scsi_dev_t *added[], int *nadded)
{
	/* assumes h->devlock is held */
	int n = h->ndevices;
	int i;
	unsigned char addr1[8], addr2[8];
	struct hpsa_scsi_dev_t *sd;

1264
	if (n >= HPSA_MAX_DEVICES) {
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
		dev_err(&h->pdev->dev, "too many devices, some will be "
			"inaccessible.\n");
		return -1;
	}

	/* physical devices do not have lun or target assigned until now. */
	if (device->lun != -1)
		/* Logical device, lun is already assigned. */
		goto lun_assigned;

	/* If this device a non-zero lun of a multi-lun device
	 * byte 4 of the 8-byte LUN addr will contain the logical
D
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1277
	 * unit no, zero otherwise.
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
	 */
	if (device->scsi3addr[4] == 0) {
		/* This is not a non-zero lun of a multi-lun device */
		if (hpsa_find_target_lun(h, device->scsi3addr,
			device->bus, &device->target, &device->lun) != 0)
			return -1;
		goto lun_assigned;
	}

	/* This is a non-zero lun of a multi-lun device.
	 * Search through our list and find the device which
1289
	 * has the same 8 byte LUN address, excepting byte 4 and 5.
1290 1291 1292 1293 1294
	 * Assign the same bus and target for this new LUN.
	 * Use the logical unit number from the firmware.
	 */
	memcpy(addr1, device->scsi3addr, 8);
	addr1[4] = 0;
1295
	addr1[5] = 0;
1296 1297 1298 1299
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
1300 1301
		addr2[5] = 0;
		/* differ only in byte 4 and 5? */
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321
		if (memcmp(addr1, addr2, 8) == 0) {
			device->bus = sd->bus;
			device->target = sd->target;
			device->lun = device->scsi3addr[4];
			break;
		}
	}
	if (device->lun == -1) {
		dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
			" suspect firmware bug or unsupported hardware "
			"configuration.\n");
			return -1;
	}

lun_assigned:

	h->dev[n] = device;
	h->ndevices++;
	added[*nadded] = device;
	(*nadded)++;
1322
	hpsa_show_dev_msg(KERN_INFO, h, device,
1323
		device->expose_device ? "added" : "masked");
1324 1325
	device->offload_to_be_enabled = device->offload_enabled;
	device->offload_enabled = 0;
1326 1327 1328
	return 0;
}

1329
/* Update an entry in h->dev[] array. */
D
Don Brace 已提交
1330
static void hpsa_scsi_update_entry(struct ctlr_info *h,
1331 1332
	int entry, struct hpsa_scsi_dev_t *new_entry)
{
1333
	int offload_enabled;
1334 1335 1336 1337 1338
	/* assumes h->devlock is held */
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);

	/* Raid level changed. */
	h->dev[entry]->raid_level = new_entry->raid_level;
1339

1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
	/* Raid offload parameters changed.  Careful about the ordering. */
	if (new_entry->offload_config && new_entry->offload_enabled) {
		/*
		 * if drive is newly offload_enabled, we want to copy the
		 * raid map data first.  If previously offload_enabled and
		 * offload_config were set, raid map data had better be
		 * the same as it was before.  if raid map data is changed
		 * then it had better be the case that
		 * h->dev[entry]->offload_enabled is currently 0.
		 */
		h->dev[entry]->raid_map = new_entry->raid_map;
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
	}
1353 1354 1355 1356 1357
	if (new_entry->hba_ioaccel_enabled) {
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
		wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
	}
	h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1358
	h->dev[entry]->offload_config = new_entry->offload_config;
1359
	h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1360
	h->dev[entry]->queue_depth = new_entry->queue_depth;
1361

1362 1363 1364 1365 1366 1367 1368 1369 1370
	/*
	 * We can turn off ioaccel offload now, but need to delay turning
	 * it on until we can update h->dev[entry]->phys_disk[], but we
	 * can't do that until all the devices are updated.
	 */
	h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
	if (!new_entry->offload_enabled)
		h->dev[entry]->offload_enabled = 0;

1371 1372
	offload_enabled = h->dev[entry]->offload_enabled;
	h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
1373
	hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1374
	h->dev[entry]->offload_enabled = offload_enabled;
1375 1376
}

1377
/* Replace an entry from h->dev[] array. */
D
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1378
static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1379 1380 1381 1382 1383
	int entry, struct hpsa_scsi_dev_t *new_entry,
	struct hpsa_scsi_dev_t *added[], int *nadded,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
1384
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1385 1386
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396

	/*
	 * New physical devices won't have target/lun assigned yet
	 * so we need to preserve the values in the slot we are replacing.
	 */
	if (new_entry->target == -1) {
		new_entry->target = h->dev[entry]->target;
		new_entry->lun = h->dev[entry]->lun;
	}

1397 1398 1399
	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
1400
	hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1401 1402
	new_entry->offload_to_be_enabled = new_entry->offload_enabled;
	new_entry->offload_enabled = 0;
1403 1404
}

1405
/* Remove an entry from h->dev[] array. */
D
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1406
static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1407 1408 1409 1410 1411 1412
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

1413
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1414 1415 1416 1417 1418 1419 1420 1421

	sd = h->dev[entry];
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;

	for (i = entry; i < h->ndevices-1; i++)
		h->dev[i] = h->dev[i+1];
	h->ndevices--;
1422
	hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
}

#define SCSI3ADDR_EQ(a, b) ( \
	(a)[7] == (b)[7] && \
	(a)[6] == (b)[6] && \
	(a)[5] == (b)[5] && \
	(a)[4] == (b)[4] && \
	(a)[3] == (b)[3] && \
	(a)[2] == (b)[2] && \
	(a)[1] == (b)[1] && \
	(a)[0] == (b)[0])

static void fixup_botched_add(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *added)
{
	/* called when scsi_add_device fails in order to re-adjust
	 * h->dev[] to match the mid layer's view.
	 */
	unsigned long flags;
	int i, j;

	spin_lock_irqsave(&h->lock, flags);
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == added) {
			for (j = i; j < h->ndevices-1; j++)
				h->dev[j] = h->dev[j+1];
			h->ndevices--;
			break;
		}
	}
	spin_unlock_irqrestore(&h->lock, flags);
	kfree(added);
}

static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* we compare everything except lun and target as these
	 * are not yet assigned.  Compare parts likely
	 * to differ first
	 */
	if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
		sizeof(dev1->scsi3addr)) != 0)
		return 0;
	if (memcmp(dev1->device_id, dev2->device_id,
		sizeof(dev1->device_id)) != 0)
		return 0;
	if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
		return 0;
	if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
		return 0;
	if (dev1->devtype != dev2->devtype)
		return 0;
	if (dev1->bus != dev2->bus)
		return 0;
	return 1;
}

1481 1482 1483 1484 1485 1486 1487 1488 1489
static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* Device attributes that can change, but don't mean
	 * that the device is a different device, nor that the OS
	 * needs to be told anything about the change.
	 */
	if (dev1->raid_level != dev2->raid_level)
		return 1;
1490 1491 1492 1493
	if (dev1->offload_config != dev2->offload_config)
		return 1;
	if (dev1->offload_enabled != dev2->offload_enabled)
		return 1;
D
Don Brace 已提交
1494 1495 1496
	if (!is_logical_dev_addr_mode(dev1->scsi3addr))
		if (dev1->queue_depth != dev2->queue_depth)
			return 1;
1497 1498 1499
	return 0;
}

1500 1501 1502
/* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 * and return needle location in *index.  If scsi3addr matches, but not
 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1503 1504 1505 1506
 * location in *index.
 * In the case of a minor device attribute change, such as RAID level, just
 * return DEVICE_UPDATED, along with the updated device's location in index.
 * If needle not found, return DEVICE_NOT_FOUND.
1507 1508 1509 1510 1511 1512 1513 1514 1515
 */
static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
	struct hpsa_scsi_dev_t *haystack[], int haystack_size,
	int *index)
{
	int i;
#define DEVICE_NOT_FOUND 0
#define DEVICE_CHANGED 1
#define DEVICE_SAME 2
1516
#define DEVICE_UPDATED 3
D
Don Brace 已提交
1517 1518 1519
	if (needle == NULL)
		return DEVICE_NOT_FOUND;

1520
	for (i = 0; i < haystack_size; i++) {
1521 1522
		if (haystack[i] == NULL) /* previously removed. */
			continue;
1523 1524
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
1525 1526 1527
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
1528
				return DEVICE_SAME;
1529
			} else {
1530 1531 1532
				/* Keep offline devices offline */
				if (needle->volume_offline)
					return DEVICE_NOT_FOUND;
1533
				return DEVICE_CHANGED;
1534
			}
1535 1536 1537 1538 1539 1540
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}

1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587
static void hpsa_monitor_offline_device(struct ctlr_info *h,
					unsigned char scsi3addr[])
{
	struct offline_device_entry *device;
	unsigned long flags;

	/* Check to see if device is already on the list */
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_for_each_entry(device, &h->offline_device_list, offline_list) {
		if (memcmp(device->scsi3addr, scsi3addr,
			sizeof(device->scsi3addr)) == 0) {
			spin_unlock_irqrestore(&h->offline_device_lock, flags);
			return;
		}
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);

	/* Device is not on the list, add it. */
	device = kmalloc(sizeof(*device), GFP_KERNEL);
	if (!device) {
		dev_warn(&h->pdev->dev, "out of memory in %s\n", __func__);
		return;
	}
	memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_add_tail(&device->offline_list, &h->offline_device_list);
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
}

/* Print a message explaining various offline volume states */
static void hpsa_show_volume_status(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *sd)
{
	if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
	switch (sd->volume_offline) {
	case HPSA_LV_OK:
		break;
	case HPSA_LV_UNDERGOING_ERASE:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
S
Scott Benesh 已提交
1588 1589 1590 1591 1592 1593
	case HPSA_LV_NOT_AVAILABLE:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
1594 1595
	case HPSA_LV_UNDERGOING_RPI:
		dev_info(&h->pdev->dev,
S
Scott Benesh 已提交
1596
			"C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1597 1598 1599 1600 1601
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_RPI:
		dev_info(&h->pdev->dev,
S
Scott Benesh 已提交
1602 1603 1604
			"C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
		break;
	case HPSA_LV_ENCRYPTED_NO_KEY:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	}
}

1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673
/*
 * Figure the list of physical drive pointers for a logical drive with
 * raid offload configured.
 */
static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices,
				struct hpsa_scsi_dev_t *logical_drive)
{
	struct raid_map_data *map = &logical_drive->raid_map;
	struct raid_map_disk_data *dd = &map->data[0];
	int i, j;
	int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
	int nraid_map_entries = le16_to_cpu(map->row_cnt) *
				le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int nphys_disk = le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int qdepth;

	if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
		nraid_map_entries = RAID_MAP_MAX_ENTRIES;

W
Webb Scales 已提交
1674 1675
	logical_drive->nphysical_disks = nraid_map_entries;

1676 1677 1678 1679 1680 1681
	qdepth = 0;
	for (i = 0; i < nraid_map_entries; i++) {
		logical_drive->phys_disk[i] = NULL;
		if (!logical_drive->offload_config)
			continue;
		for (j = 0; j < ndevices; j++) {
D
Don Brace 已提交
1682 1683
			if (dev[j] == NULL)
				continue;
1684 1685
			if (dev[j]->devtype != TYPE_DISK &&
			    dev[j]->devtype != TYPE_ZBC)
D
Don Brace 已提交
1686
				continue;
1687
			if (is_logical_device(dev[j]))
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707
				continue;
			if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
				continue;

			logical_drive->phys_disk[i] = dev[j];
			if (i < nphys_disk)
				qdepth = min(h->nr_cmds, qdepth +
				    logical_drive->phys_disk[i]->queue_depth);
			break;
		}

		/*
		 * This can happen if a physical drive is removed and
		 * the logical drive is degraded.  In that case, the RAID
		 * map data will refer to a physical disk which isn't actually
		 * present.  And in that case offload_enabled should already
		 * be 0, but we'll turn it off here just in case
		 */
		if (!logical_drive->phys_disk[i]) {
			logical_drive->offload_enabled = 0;
1708 1709
			logical_drive->offload_to_be_enabled = 0;
			logical_drive->queue_depth = 8;
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
		}
	}
	if (nraid_map_entries)
		/*
		 * This is correct for reads, too high for full stripe writes,
		 * way too high for partial stripe writes
		 */
		logical_drive->queue_depth = qdepth;
	else
		logical_drive->queue_depth = h->nr_cmds;
}

static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices)
{
	int i;

	for (i = 0; i < ndevices; i++) {
D
Don Brace 已提交
1728 1729
		if (dev[i] == NULL)
			continue;
1730 1731
		if (dev[i]->devtype != TYPE_DISK &&
		    dev[i]->devtype != TYPE_ZBC)
D
Don Brace 已提交
1732
			continue;
1733
		if (!is_logical_device(dev[i]))
1734
			continue;
1735 1736 1737 1738 1739 1740 1741 1742 1743 1744

		/*
		 * If offload is currently enabled, the RAID map and
		 * phys_disk[] assignment *better* not be changing
		 * and since it isn't changing, we do not need to
		 * update it.
		 */
		if (dev[i]->offload_enabled)
			continue;

1745 1746 1747 1748
		hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
	}
}

1749 1750 1751 1752 1753 1754 1755
static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
	int rc = 0;

	if (!h->scsi_host)
		return 1;

K
Kevin Barnett 已提交
1756 1757
	if (is_logical_device(device)) /* RAID */
		rc = scsi_add_device(h->scsi_host, device->bus,
1758
					device->target, device->lun);
K
Kevin Barnett 已提交
1759 1760 1761
	else /* HBA */
		rc = hpsa_add_sas_device(h->sas_host, device);

1762 1763 1764
	return rc;
}

1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809
static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
						struct hpsa_scsi_dev_t *dev)
{
	int i;
	int count = 0;

	for (i = 0; i < h->nr_cmds; i++) {
		struct CommandList *c = h->cmd_pool + i;
		int refcount = atomic_inc_return(&c->refcount);

		if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
				dev->scsi3addr)) {
			unsigned long flags;

			spin_lock_irqsave(&h->lock, flags);	/* Implied MB */
			if (!hpsa_is_cmd_idle(c))
				++count;
			spin_unlock_irqrestore(&h->lock, flags);
		}

		cmd_free(h, c);
	}

	return count;
}

static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
						struct hpsa_scsi_dev_t *device)
{
	int cmds = 0;
	int waits = 0;

	while (1) {
		cmds = hpsa_find_outstanding_commands_for_dev(h, device);
		if (cmds == 0)
			break;
		if (++waits > 20)
			break;
		dev_warn(&h->pdev->dev,
			"%s: removing device with %d outstanding commands!\n",
			__func__, cmds);
		msleep(1000);
	}
}

1810 1811 1812 1813 1814 1815 1816 1817
static void hpsa_remove_device(struct ctlr_info *h,
			struct hpsa_scsi_dev_t *device)
{
	struct scsi_device *sdev = NULL;

	if (!h->scsi_host)
		return;

K
Kevin Barnett 已提交
1818 1819
	if (is_logical_device(device)) { /* RAID */
		sdev = scsi_device_lookup(h->scsi_host, device->bus,
1820
						device->target, device->lun);
K
Kevin Barnett 已提交
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
		if (sdev) {
			scsi_remove_device(sdev);
			scsi_device_put(sdev);
		} else {
			/*
			 * We don't expect to get here.  Future commands
			 * to this device will get a selection timeout as
			 * if the device were gone.
			 */
			hpsa_show_dev_msg(KERN_WARNING, h, device,
1831
					"didn't find device for removal.");
K
Kevin Barnett 已提交
1832
		}
1833 1834 1835 1836 1837
	} else { /* HBA */

		device->removed = 1;
		hpsa_wait_for_outstanding_commands_for_dev(h, device);

K
Kevin Barnett 已提交
1838
		hpsa_remove_sas_device(device);
1839
	}
1840 1841
}

D
Don Brace 已提交
1842
static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854
	struct hpsa_scsi_dev_t *sd[], int nsds)
{
	/* sd contains scsi3 addresses and devtypes, and inquiry
	 * data.  This function takes what's in sd to be the current
	 * reality and updates h->dev[] to reflect that reality.
	 */
	int i, entry, device_change, changes = 0;
	struct hpsa_scsi_dev_t *csd;
	unsigned long flags;
	struct hpsa_scsi_dev_t **added, **removed;
	int nadded, nremoved;

D
Don Brace 已提交
1855 1856 1857 1858 1859 1860 1861 1862
	/*
	 * A reset can cause a device status to change
	 * re-schedule the scan to see what happened.
	 */
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
		return;
	}
1863

1864 1865
	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878

	if (!added || !removed) {
		dev_warn(&h->pdev->dev, "out of memory in "
			"adjust_hpsa_scsi_table\n");
		goto free_and_out;
	}

	spin_lock_irqsave(&h->devlock, flags);

	/* find any devices in h->dev[] that are not in
	 * sd[] and remove them from h->dev[], and for any
	 * devices which have changed, remove the old device
	 * info and add the new device info.
1879 1880
	 * If minor device attributes change, just update
	 * the existing device structure.
1881 1882 1883 1884 1885 1886 1887 1888 1889
	 */
	i = 0;
	nremoved = 0;
	nadded = 0;
	while (i < h->ndevices) {
		csd = h->dev[i];
		device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
D
Don Brace 已提交
1890
			hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1891 1892 1893
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
D
Don Brace 已提交
1894
			hpsa_scsi_replace_entry(h, i, sd[entry],
1895
				added, &nadded, removed, &nremoved);
1896 1897 1898 1899
			/* Set it to NULL to prevent it from being freed
			 * at the bottom of hpsa_update_scsi_devices()
			 */
			sd[entry] = NULL;
1900
		} else if (device_change == DEVICE_UPDATED) {
D
Don Brace 已提交
1901
			hpsa_scsi_update_entry(h, i, sd[entry]);
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912
		}
		i++;
	}

	/* Now, make sure every device listed in sd[] is also
	 * listed in h->dev[], adding them if they aren't found
	 */

	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;
1913 1914 1915 1916 1917 1918 1919 1920

		/* Don't add devices which are NOT READY, FORMAT IN PROGRESS
		 * as the SCSI mid-layer does not handle such devices well.
		 * It relentlessly loops sending TUR at 3Hz, then READ(10)
		 * at 160Hz, and prevents the system from coming up.
		 */
		if (sd[i]->volume_offline) {
			hpsa_show_volume_status(h, sd[i]);
1921
			hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1922 1923 1924
			continue;
		}

1925 1926 1927 1928
		device_change = hpsa_scsi_find_entry(sd[i], h->dev,
					h->ndevices, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
D
Don Brace 已提交
1929
			if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939
				break;
			sd[i] = NULL; /* prevent from being freed later. */
		} else if (device_change == DEVICE_CHANGED) {
			/* should never happen... */
			changes++;
			dev_warn(&h->pdev->dev,
				"device unexpectedly changed.\n");
			/* but if it does happen, we just ignore that device */
		}
	}
1940 1941 1942 1943 1944
	hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);

	/* Now that h->dev[]->phys_disk[] is coherent, we can enable
	 * any logical drives that need it enabled.
	 */
D
Don Brace 已提交
1945 1946 1947
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == NULL)
			continue;
1948
		h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
D
Don Brace 已提交
1949
	}
1950

1951 1952
	spin_unlock_irqrestore(&h->devlock, flags);

1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
	/* Monitor devices which are in one of several NOT READY states to be
	 * brought online later. This must be done without holding h->devlock,
	 * so don't touch h->dev[]
	 */
	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;
		if (sd[i]->volume_offline)
			hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
	}

1964 1965 1966 1967
	/* Don't notify scsi mid layer of any changes the first time through
	 * (or if there are no changes) scsi_scan_host will do it later the
	 * first time through.
	 */
D
Don Brace 已提交
1968
	if (!changes)
1969 1970 1971 1972
		goto free_and_out;

	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
D
Don Brace 已提交
1973 1974
		if (removed[i] == NULL)
			continue;
1975 1976
		if (removed[i]->expose_device)
			hpsa_remove_device(h, removed[i]);
1977 1978 1979 1980 1981 1982
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
1983 1984
		int rc = 0;

D
Don Brace 已提交
1985 1986
		if (added[i] == NULL)
			continue;
1987
		if (!(added[i]->expose_device))
1988
			continue;
1989 1990
		rc = hpsa_add_device(h, added[i]);
		if (!rc)
1991
			continue;
1992 1993
		dev_warn(&h->pdev->dev,
			"addition failed %d, device not added.", rc);
1994 1995 1996 1997
		/* now we have to remove it from h->dev,
		 * since it didn't get added to scsi mid layer
		 */
		fixup_botched_add(h, added[i]);
D
Don Brace 已提交
1998
		h->drv_req_rescan = 1;
1999 2000 2001 2002 2003 2004 2005 2006
	}

free_and_out:
	kfree(added);
	kfree(removed);
}

/*
2007
 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
 * Assume's h->devlock is held.
 */
static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
	int bus, int target, int lun)
{
	int i;
	struct hpsa_scsi_dev_t *sd;

	for (i = 0; i < h->ndevices; i++) {
		sd = h->dev[i];
		if (sd->bus == bus && sd->target == target && sd->lun == lun)
			return sd;
	}
	return NULL;
}

static int hpsa_slave_alloc(struct scsi_device *sdev)
{
2026
	struct hpsa_scsi_dev_t *sd = NULL;
2027 2028 2029 2030 2031
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
K
Kevin Barnett 已提交
2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042
	if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
		struct scsi_target *starget;
		struct sas_rphy *rphy;

		starget = scsi_target(sdev);
		rphy = target_to_rphy(starget);
		sd = hpsa_find_device_by_sas_rphy(h, rphy);
		if (sd) {
			sd->target = sdev_id(sdev);
			sd->lun = sdev->lun;
		}
2043 2044
	}
	if (!sd)
K
Kevin Barnett 已提交
2045 2046 2047 2048
		sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
					sdev_id(sdev), sdev->lun);

	if (sd && sd->expose_device) {
2049
		atomic_set(&sd->ioaccel_cmds_out, 0);
K
Kevin Barnett 已提交
2050
		sdev->hostdata = sd;
2051 2052
	} else
		sdev->hostdata = NULL;
2053 2054 2055 2056
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}

2057 2058 2059 2060 2061 2062 2063
/* configure scsi device based on internal per-device structure */
static int hpsa_slave_configure(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd;
	int queue_depth;

	sd = sdev->hostdata;
2064
	sdev->no_uld_attach = !sd || !sd->expose_device;
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076

	if (sd)
		queue_depth = sd->queue_depth != 0 ?
			sd->queue_depth : sdev->host->can_queue;
	else
		queue_depth = sdev->host->can_queue;

	scsi_change_queue_depth(sdev, queue_depth);

	return 0;
}

2077 2078
static void hpsa_slave_destroy(struct scsi_device *sdev)
{
2079
	/* nothing to do. */
2080 2081
}

2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121
static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->ioaccel2_cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->ioaccel2_cmd_sg_list[i]);
		h->ioaccel2_cmd_sg_list[i] = NULL;
	}
	kfree(h->ioaccel2_cmd_sg_list);
	h->ioaccel2_cmd_sg_list = NULL;
}

static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->ioaccel2_cmd_sg_list =
		kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
					GFP_KERNEL);
	if (!h->ioaccel2_cmd_sg_list)
		return -ENOMEM;
	for (i = 0; i < h->nr_cmds; i++) {
		h->ioaccel2_cmd_sg_list[i] =
			kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
					h->maxsgentries, GFP_KERNEL);
		if (!h->ioaccel2_cmd_sg_list[i])
			goto clean;
	}
	return 0;

clean:
	hpsa_free_ioaccel2_sg_chain_blocks(h);
	return -ENOMEM;
}

2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135
static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->cmd_sg_list[i]);
		h->cmd_sg_list[i] = NULL;
	}
	kfree(h->cmd_sg_list);
	h->cmd_sg_list = NULL;
}

R
Robert Elliott 已提交
2136
static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2137 2138 2139 2140 2141 2142 2143 2144
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
				GFP_KERNEL);
2145 2146
	if (!h->cmd_sg_list) {
		dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
2147
		return -ENOMEM;
2148
	}
2149 2150 2151
	for (i = 0; i < h->nr_cmds; i++) {
		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
						h->chainsize, GFP_KERNEL);
2152 2153
		if (!h->cmd_sg_list[i]) {
			dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
2154
			goto clean;
2155
		}
2156 2157 2158 2159 2160 2161 2162 2163
	}
	return 0;

clean:
	hpsa_free_sg_chain_blocks(h);
	return -ENOMEM;
}

2164 2165 2166 2167 2168 2169 2170 2171
static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp, struct CommandList *c)
{
	struct ioaccel2_sg_element *chain_block;
	u64 temp64;
	u32 chain_size;

	chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
D
Don Brace 已提交
2172
	chain_size = le32_to_cpu(cp->sg[0].length);
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
	temp64 = pci_map_single(h->pdev, chain_block, chain_size,
				PCI_DMA_TODEVICE);
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
		cp->sg->address = 0;
		return -1;
	}
	cp->sg->address = cpu_to_le64(temp64);
	return 0;
}

static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp)
{
	struct ioaccel2_sg_element *chain_sg;
	u64 temp64;
	u32 chain_size;

	chain_sg = cp->sg;
	temp64 = le64_to_cpu(chain_sg->address);
D
Don Brace 已提交
2193
	chain_size = le32_to_cpu(cp->sg[0].length);
2194 2195 2196
	pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}

2197
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2198 2199 2200 2201
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;
2202
	u32 chain_len;
2203 2204 2205

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
2206 2207
	chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
	chain_len = sizeof(*chain_sg) *
D
Don Brace 已提交
2208
		(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2209 2210
	chain_sg->Len = cpu_to_le32(chain_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_len,
2211
				PCI_DMA_TODEVICE);
2212 2213
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
2214
		chain_sg->Addr = cpu_to_le64(0);
2215 2216
		return -1;
	}
2217
	chain_sg->Addr = cpu_to_le64(temp64);
2218
	return 0;
2219 2220 2221 2222 2223 2224 2225
}

static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg;

2226
	if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2227 2228 2229
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2230 2231
	pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
			le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
2232 2233
}

2234 2235 2236 2237 2238 2239

/* Decode the various types of errors on ioaccel2 path.
 * Return 1 for any error that should generate a RAID path retry.
 * Return 0 for errors that don't require a RAID path retry.
 */
static int handle_ioaccel_mode2_error(struct ctlr_info *h,
2240 2241
					struct CommandList *c,
					struct scsi_cmnd *cmd,
2242 2243
					struct io_accel2_cmd *c2,
					struct hpsa_scsi_dev_t *dev)
2244 2245
{
	int data_len;
2246
	int retry = 0;
2247
	u32 ioaccel2_resid = 0;
2248 2249 2250 2251 2252 2253 2254

	switch (c2->error_data.serv_response) {
	case IOACCEL2_SERV_RESPONSE_COMPLETE:
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
2255
			cmd->result |= SAM_STAT_CHECK_CONDITION;
2256
			if (c2->error_data.data_present !=
2257 2258 2259
					IOACCEL2_SENSE_DATA_PRESENT) {
				memset(cmd->sense_buffer, 0,
					SCSI_SENSE_BUFFERSIZE);
2260
				break;
2261
			}
2262 2263 2264 2265 2266 2267 2268 2269 2270
			/* copy the sense data */
			data_len = c2->error_data.sense_data_len;
			if (data_len > SCSI_SENSE_BUFFERSIZE)
				data_len = SCSI_SENSE_BUFFERSIZE;
			if (data_len > sizeof(c2->error_data.sense_data_buff))
				data_len =
					sizeof(c2->error_data.sense_data_buff);
			memcpy(cmd->sense_buffer,
				c2->error_data.sense_data_buff, data_len);
2271
			retry = 1;
2272 2273
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2274
			retry = 1;
2275 2276
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2277
			retry = 1;
2278 2279
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2280
			retry = 1;
2281 2282
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2283
			retry = 1;
2284 2285
			break;
		default:
2286
			retry = 1;
2287 2288 2289 2290
			break;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_FAILURE:
2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_IO_ERROR:
		case IOACCEL2_STATUS_SR_IO_ABORTED:
		case IOACCEL2_STATUS_SR_OVERRUN:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_UNDERRUN:
			cmd->result = (DID_OK << 16);		/* host byte */
			cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
			ioaccel2_resid = get_unaligned_le32(
						&c2->error_data.resid_cnt[0]);
			scsi_set_resid(cmd, ioaccel2_resid);
			break;
		case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
		case IOACCEL2_STATUS_SR_INVALID_DEVICE:
		case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327
			/*
			 * Did an HBA disk disappear? We will eventually
			 * get a state change event from the controller but
			 * in the meantime, we need to tell the OS that the
			 * HBA disk is no longer there and stop I/O
			 * from going down. This allows the potential re-insert
			 * of the disk to get the same device node.
			 */
			if (dev->physical_device && dev->expose_device) {
				cmd->result = DID_NO_CONNECT << 16;
				dev->removed = 1;
				h->drv_req_rescan = 1;
				dev_warn(&h->pdev->dev,
					"%s: device is gone!\n", __func__);
			} else
				/*
				 * Retry by sending down the RAID path.
				 * We will get an event from ctlr to
				 * trigger rescan regardless.
				 */
				retry = 1;
2328 2329 2330 2331
			break;
		default:
			retry = 1;
		}
2332 2333 2334 2335 2336 2337
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2338
		retry = 1;
2339 2340 2341 2342
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		break;
	default:
2343
		retry = 1;
2344 2345
		break;
	}
2346 2347

	return retry;	/* retry on raid path? */
2348 2349
}

2350 2351 2352
static void hpsa_cmd_resolve_events(struct ctlr_info *h,
		struct CommandList *c)
{
W
Webb Scales 已提交
2353 2354
	bool do_wake = false;

2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365
	/*
	 * Prevent the following race in the abort handler:
	 *
	 * 1. LLD is requested to abort a SCSI command
	 * 2. The SCSI command completes
	 * 3. The struct CommandList associated with step 2 is made available
	 * 4. New I/O request to LLD to another LUN re-uses struct CommandList
	 * 5. Abort handler follows scsi_cmnd->host_scribble and
	 *    finds struct CommandList and tries to aborts it
	 * Now we have aborted the wrong command.
	 *
W
Webb Scales 已提交
2366 2367
	 * Reset c->scsi_cmd here so that the abort or reset handler will know
	 * this command has completed.  Then, check to see if the handler is
2368 2369 2370
	 * waiting for this command, and, if so, wake it.
	 */
	c->scsi_cmd = SCSI_CMD_IDLE;
W
Webb Scales 已提交
2371
	mb();	/* Declare command idle before checking for pending events. */
2372
	if (c->abort_pending) {
W
Webb Scales 已提交
2373
		do_wake = true;
2374 2375
		c->abort_pending = false;
	}
W
Webb Scales 已提交
2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394
	if (c->reset_pending) {
		unsigned long flags;
		struct hpsa_scsi_dev_t *dev;

		/*
		 * There appears to be a reset pending; lock the lock and
		 * reconfirm.  If so, then decrement the count of outstanding
		 * commands and wake the reset command if this is the last one.
		 */
		spin_lock_irqsave(&h->lock, flags);
		dev = c->reset_pending;		/* Re-fetch under the lock. */
		if (dev && atomic_dec_and_test(&dev->reset_cmds_out))
			do_wake = true;
		c->reset_pending = NULL;
		spin_unlock_irqrestore(&h->lock, flags);
	}

	if (do_wake)
		wake_up_all(&h->event_sync_wait_queue);
2395 2396
}

2397 2398 2399 2400 2401 2402 2403
static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
				      struct CommandList *c)
{
	hpsa_cmd_resolve_events(h, c);
	cmd_tagged_free(h, c);
}

2404 2405 2406
static void hpsa_cmd_free_and_done(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd)
{
2407
	hpsa_cmd_resolve_and_free(h, c);
2408 2409
	if (cmd && cmd->scsi_done)
		cmd->scsi_done(cmd);
2410 2411 2412 2413 2414 2415 2416 2417
}

static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
{
	INIT_WORK(&c->work, hpsa_command_resubmit_worker);
	queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
}

2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
static void hpsa_set_scsi_cmd_aborted(struct scsi_cmnd *cmd)
{
	cmd->result = DID_ABORT << 16;
}

static void hpsa_cmd_abort_and_free(struct ctlr_info *h, struct CommandList *c,
				    struct scsi_cmnd *cmd)
{
	hpsa_set_scsi_cmd_aborted(cmd);
	dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
			 c->Request.CDB, c->err_info->ScsiStatus);
2429
	hpsa_cmd_resolve_and_free(h, c);
2430 2431
}

2432 2433 2434 2435 2436 2437 2438 2439
static void process_ioaccel2_completion(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd,
		struct hpsa_scsi_dev_t *dev)
{
	struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];

	/* check for good status */
	if (likely(c2->error_data.serv_response == 0 &&
2440 2441
			c2->error_data.status == 0))
		return hpsa_cmd_free_and_done(h, c, cmd);
2442

2443 2444
	/*
	 * Any RAID offload error results in retry which will use
2445 2446 2447
	 * the normal I/O path so the controller can handle whatever's
	 * wrong.
	 */
2448
	if (is_logical_device(dev) &&
2449 2450
		c2->error_data.serv_response ==
			IOACCEL2_SERV_RESPONSE_FAILURE) {
2451
		if (c2->error_data.status ==
2452
			IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2453
			dev->offload_enabled = 0;
2454 2455
			dev->offload_to_be_enabled = 0;
		}
2456 2457

		return hpsa_retry_cmd(h, c);
2458
	}
2459

2460
	if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2461
		return hpsa_retry_cmd(h, c);
2462

2463
	return hpsa_cmd_free_and_done(h, c, cmd);
2464 2465
}

2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
/* Returns 0 on success, < 0 otherwise. */
static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
					struct CommandList *cp)
{
	u8 tmf_status = cp->err_info->ScsiStatus;

	switch (tmf_status) {
	case CISS_TMF_COMPLETE:
		/*
		 * CISS_TMF_COMPLETE never happens, instead,
		 * ei->CommandStatus == 0 for this case.
		 */
	case CISS_TMF_SUCCESS:
		return 0;
	case CISS_TMF_INVALID_FRAME:
	case CISS_TMF_NOT_SUPPORTED:
	case CISS_TMF_FAILED:
	case CISS_TMF_WRONG_LUN:
	case CISS_TMF_OVERLAPPED_TAG:
		break;
	default:
		dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
				tmf_status);
		break;
	}
	return -tmf_status;
}

2494
static void complete_scsi_command(struct CommandList *cp)
2495 2496 2497 2498
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;
2499
	struct hpsa_scsi_dev_t *dev;
2500
	struct io_accel2_cmd *c2;
2501

2502 2503 2504
	u8 sense_key;
	u8 asc;      /* additional sense code */
	u8 ascq;     /* additional sense code qualifier */
2505
	unsigned long sense_data_size;
2506 2507

	ei = cp->err_info;
2508
	cmd = cp->scsi_cmd;
2509
	h = cp->h;
2510 2511 2512 2513 2514 2515

	if (!cmd->device) {
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}

2516
	dev = cmd->device->hostdata;
2517 2518 2519 2520
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}
2521
	c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2522 2523

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
2524
	if ((cp->cmd_type == CMD_SCSI) &&
D
Don Brace 已提交
2525
		(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2526
		hpsa_unmap_sg_chain_block(h, cp);
2527

2528 2529 2530 2531
	if ((cp->cmd_type == CMD_IOACCEL2) &&
		(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
		hpsa_unmap_ioaccel2_sg_chain_block(h, c2);

2532 2533
	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
2534

2535 2536 2537 2538 2539 2540 2541 2542 2543
	if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
		if (dev->physical_device && dev->expose_device &&
			dev->removed) {
			cmd->result = DID_NO_CONNECT << 16;
			return hpsa_cmd_free_and_done(h, cp, cmd);
		}
		if (likely(cp->phys_disk != NULL))
			atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
	}
2544

2545 2546 2547 2548 2549 2550 2551 2552
	/*
	 * We check for lockup status here as it may be set for
	 * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
	 * fail_all_oustanding_cmds()
	 */
	if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
		/* DID_NO_CONNECT will prevent a retry */
		cmd->result = DID_NO_CONNECT << 16;
2553
		return hpsa_cmd_free_and_done(h, cp, cmd);
2554 2555
	}

W
Webb Scales 已提交
2556 2557
	if ((unlikely(hpsa_is_pending_event(cp)))) {
		if (cp->reset_pending)
D
Don Brace 已提交
2558
			return hpsa_cmd_free_and_done(h, cp, cmd);
W
Webb Scales 已提交
2559 2560 2561 2562
		if (cp->abort_pending)
			return hpsa_cmd_abort_and_free(h, cp, cmd);
	}

2563 2564 2565
	if (cp->cmd_type == CMD_IOACCEL2)
		return process_ioaccel2_completion(h, cp, cmd, dev);

2566
	scsi_set_resid(cmd, ei->ResidualCnt);
2567 2568
	if (ei->CommandStatus == 0)
		return hpsa_cmd_free_and_done(h, cp, cmd);
2569

2570 2571 2572 2573 2574
	/* For I/O accelerator commands, copy over some fields to the normal
	 * CISS header used below for error handling.
	 */
	if (cp->cmd_type == CMD_IOACCEL1) {
		struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
D
Don Brace 已提交
2575 2576 2577 2578
		cp->Header.SGList = scsi_sg_count(cmd);
		cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
		cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
			IOACCEL1_IOFLAGS_CDBLEN_MASK;
2579
		cp->Header.tag = c->tag;
2580 2581
		memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
		memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2582 2583 2584 2585 2586

		/* Any RAID offload error results in retry which will use
		 * the normal I/O path so the controller can handle whatever's
		 * wrong.
		 */
2587
		if (is_logical_device(dev)) {
2588 2589
			if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
				dev->offload_enabled = 0;
W
Webb Scales 已提交
2590
			return hpsa_retry_cmd(h, cp);
2591
		}
2592 2593
	}

2594 2595 2596 2597
	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609
		cmd->result |= ei->ScsiStatus;
		/* copy the sense data */
		if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
			sense_data_size = SCSI_SENSE_BUFFERSIZE;
		else
			sense_data_size = sizeof(ei->SenseInfo);
		if (ei->SenseLen < sense_data_size)
			sense_data_size = ei->SenseLen;
		memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
		if (ei->ScsiStatus)
			decode_sense_data(ei->SenseInfo, sense_data_size,
				&sense_key, &asc, &ascq);
2610
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2611
			if (sense_key == ABORTED_COMMAND) {
2612
				cmd->result |= DID_SOFT_ERROR << 16;
2613 2614
				break;
			}
2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649
			break;
		}
		/* Problem was not a check condition
		 * Pass it up to the upper layers...
		 */
		if (ei->ScsiStatus) {
			dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
				"Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
				"Returning result: 0x%x\n",
				cp, ei->ScsiStatus,
				sense_key, asc, ascq,
				cmd->result);
		} else {  /* scsi status is zero??? How??? */
			dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
				"Returning no connection.\n", cp),

			/* Ordinarily, this case should never happen,
			 * but there is a bug in some released firmware
			 * revisions that allows it to happen if, for
			 * example, a 4100 backplane loses power and
			 * the tape drive is in it.  We assume that
			 * it's a fatal error of some kind because we
			 * can't show that it wasn't. We will make it
			 * look like selection timeout since that is
			 * the most common reason for this to occur,
			 * and it's severe enough.
			 */

			cmd->result = DID_NO_CONNECT << 16;
		}
		break;

	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
2650 2651
		dev_warn(&h->pdev->dev,
			"CDB %16phN data overrun\n", cp->Request.CDB);
2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665
		break;
	case CMD_INVALID: {
		/* print_bytes(cp, sizeof(*cp), 1, 0);
		print_cmd(cp); */
		/* We get CMD_INVALID if you address a non-existent device
		 * instead of a selection timeout (no response).  You will
		 * see this if you yank out a drive, then try to access it.
		 * This is kind of a shame because it means that any other
		 * CMD_INVALID (e.g. driver bug) will get interpreted as a
		 * missing target. */
		cmd->result = DID_NO_CONNECT << 16;
	}
		break;
	case CMD_PROTOCOL_ERR:
2666
		cmd->result = DID_ERROR << 16;
2667 2668
		dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
				cp->Request.CDB);
2669 2670 2671
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
2672 2673
		dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
			cp->Request.CDB);
2674 2675 2676
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
2677 2678
		dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
			cp->Request.CDB);
2679 2680
		break;
	case CMD_ABORTED:
2681 2682
		/* Return now to avoid calling scsi_done(). */
		return hpsa_cmd_abort_and_free(h, cp, cmd);
2683 2684
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
2685 2686
		dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
			cp->Request.CDB);
2687 2688
		break;
	case CMD_UNSOLICITED_ABORT:
2689
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2690 2691
		dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
			cp->Request.CDB);
2692 2693 2694
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
2695 2696
		dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
			cp->Request.CDB);
2697
		break;
2698 2699 2700 2701
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
2702 2703 2704 2705
	case CMD_TMF_STATUS:
		if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
			cmd->result = DID_ERROR << 16;
		break;
2706 2707 2708 2709 2710 2711 2712 2713
	case CMD_IOACCEL_DISABLED:
		/* This only handles the direct pass-through case since RAID
		 * offload is handled above.  Just attempt a retry.
		 */
		cmd->result = DID_SOFT_ERROR << 16;
		dev_warn(&h->pdev->dev,
				"cp %p had HP SSD Smart Path error\n", cp);
		break;
2714 2715 2716 2717 2718
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}
2719 2720

	return hpsa_cmd_free_and_done(h, cp, cmd);
2721 2722 2723 2724 2725 2726 2727
}

static void hpsa_pci_unmap(struct pci_dev *pdev,
	struct CommandList *c, int sg_used, int data_direction)
{
	int i;

2728 2729 2730 2731
	for (i = 0; i < sg_used; i++)
		pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
				le32_to_cpu(c->SG[i].Len),
				data_direction);
2732 2733
}

2734
static int hpsa_map_one(struct pci_dev *pdev,
2735 2736 2737 2738 2739
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
2740
	u64 addr64;
2741 2742 2743

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
2744
		cp->Header.SGTotal = cpu_to_le16(0);
2745
		return 0;
2746 2747
	}

2748
	addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2749
	if (dma_mapping_error(&pdev->dev, addr64)) {
2750
		/* Prevent subsequent unmap of something never mapped */
2751
		cp->Header.SGList = 0;
2752
		cp->Header.SGTotal = cpu_to_le16(0);
2753
		return -1;
2754
	}
2755 2756 2757 2758 2759
	cp->SG[0].Addr = cpu_to_le64(addr64);
	cp->SG[0].Len = cpu_to_le32(buflen);
	cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
	cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
	cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2760
	return 0;
2761 2762
}

2763 2764 2765 2766
#define NO_TIMEOUT ((unsigned long) -1)
#define DEFAULT_TIMEOUT 30000 /* milliseconds */
static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
	struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2767 2768 2769 2770
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792
	__enqueue_cmd_and_start_io(h, c, reply_queue);
	if (timeout_msecs == NO_TIMEOUT) {
		/* TODO: get rid of this no-timeout thing */
		wait_for_completion_io(&wait);
		return IO_OK;
	}
	if (!wait_for_completion_io_timeout(&wait,
					msecs_to_jiffies(timeout_msecs))) {
		dev_warn(&h->pdev->dev, "Command timed out.\n");
		return -ETIMEDOUT;
	}
	return IO_OK;
}

static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
				   int reply_queue, unsigned long timeout_msecs)
{
	if (unlikely(lockup_detected(h))) {
		c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
		return IO_OK;
	}
	return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2793 2794
}

2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806
static u32 lockup_detected(struct ctlr_info *h)
{
	int cpu;
	u32 rc, *lockup_detected;

	cpu = get_cpu();
	lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
	rc = *lockup_detected;
	put_cpu();
	return rc;
}

2807
#define MAX_DRIVER_CMD_RETRIES 25
2808 2809
static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2810
{
2811
	int backoff_time = 10, retry_count = 0;
2812
	int rc;
2813 2814

	do {
2815
		memset(c->err_info, 0, sizeof(*c->err_info));
2816 2817 2818 2819
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						  timeout_msecs);
		if (rc)
			break;
2820
		retry_count++;
2821 2822 2823 2824 2825
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
2826
	} while ((check_for_unit_attention(h, c) ||
2827 2828
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
2829
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2830 2831 2832
	if (retry_count > MAX_DRIVER_CMD_RETRIES)
		rc = -EIO;
	return rc;
2833 2834
}

2835 2836
static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
				struct CommandList *c)
2837
{
2838 2839 2840
	const u8 *cdb = c->Request.CDB;
	const u8 *lun = c->Header.LUN.LunAddrBytes;

2841 2842
	dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
		 txt, lun, cdb);
2843 2844 2845 2846 2847 2848
}

static void hpsa_scsi_interpret_error(struct ctlr_info *h,
			struct CommandList *cp)
{
	const struct ErrorInfo *ei = cp->err_info;
2849
	struct device *d = &cp->h->pdev->dev;
2850 2851
	u8 sense_key, asc, ascq;
	int sense_len;
2852 2853 2854

	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
2855 2856 2857 2858 2859 2860
		if (ei->SenseLen > sizeof(ei->SenseInfo))
			sense_len = sizeof(ei->SenseInfo);
		else
			sense_len = ei->SenseLen;
		decode_sense_data(ei->SenseInfo, sense_len,
					&sense_key, &asc, &ascq);
2861 2862
		hpsa_print_cmd(h, "SCSI status", cp);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2863 2864
			dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
				sense_key, asc, ascq);
2865
		else
2866
			dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2867 2868 2869 2870 2871 2872 2873 2874 2875
		if (ei->ScsiStatus == 0)
			dev_warn(d, "SCSI status is abnormally zero.  "
			"(probably indicates selection timeout "
			"reported incorrectly due to a known "
			"firmware bug, circa July, 2001.)\n");
		break;
	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
2876
		hpsa_print_cmd(h, "overrun condition", cp);
2877 2878 2879 2880 2881
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
		 * to non-existent targets as invalid commands.
		 */
2882 2883
		hpsa_print_cmd(h, "invalid command", cp);
		dev_warn(d, "probably means device no longer present\n");
2884 2885 2886
		}
		break;
	case CMD_PROTOCOL_ERR:
2887
		hpsa_print_cmd(h, "protocol error", cp);
2888 2889
		break;
	case CMD_HARDWARE_ERR:
2890
		hpsa_print_cmd(h, "hardware error", cp);
2891 2892
		break;
	case CMD_CONNECTION_LOST:
2893
		hpsa_print_cmd(h, "connection lost", cp);
2894 2895
		break;
	case CMD_ABORTED:
2896
		hpsa_print_cmd(h, "aborted", cp);
2897 2898
		break;
	case CMD_ABORT_FAILED:
2899
		hpsa_print_cmd(h, "abort failed", cp);
2900 2901
		break;
	case CMD_UNSOLICITED_ABORT:
2902
		hpsa_print_cmd(h, "unsolicited abort", cp);
2903 2904
		break;
	case CMD_TIMEOUT:
2905
		hpsa_print_cmd(h, "timed out", cp);
2906
		break;
2907
	case CMD_UNABORTABLE:
2908
		hpsa_print_cmd(h, "unabortable", cp);
2909
		break;
2910 2911 2912
	case CMD_CTLR_LOCKUP:
		hpsa_print_cmd(h, "controller lockup detected", cp);
		break;
2913
	default:
2914 2915
		hpsa_print_cmd(h, "unknown status", cp);
		dev_warn(d, "Unknown command status %x\n",
2916 2917 2918 2919 2920
				ei->CommandStatus);
	}
}

static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
2921
			u16 page, unsigned char *buf,
2922 2923 2924 2925 2926 2927
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2928
	c = cmd_alloc(h);
2929

2930 2931 2932 2933 2934
	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
2935
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
2936
					PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
2937 2938
	if (rc)
		goto out;
2939 2940
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2941
		hpsa_scsi_interpret_error(h, c);
2942 2943
		rc = -1;
	}
2944
out:
2945
	cmd_free(h, c);
2946 2947 2948
	return rc;
}

2949
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
2950
	u8 reset_type, int reply_queue)
2951 2952 2953 2954 2955
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2956
	c = cmd_alloc(h);
2957 2958


2959
	/* fill_cmd can't fail here, no data buffer to map. */
S
Scott Teel 已提交
2960
	(void) fill_cmd(c, reset_type, h, NULL, 0, 0,
2961
			scsi3addr, TYPE_MSG);
2962
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
2963 2964 2965 2966
	if (rc) {
		dev_warn(&h->pdev->dev, "Failed to send reset command\n");
		goto out;
	}
2967 2968 2969 2970
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
2971
		hpsa_scsi_interpret_error(h, c);
2972 2973
		rc = -1;
	}
2974
out:
2975
	cmd_free(h, c);
2976 2977 2978
	return rc;
}

W
Webb Scales 已提交
2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083
static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
			       struct hpsa_scsi_dev_t *dev,
			       unsigned char *scsi3addr)
{
	int i;
	bool match = false;
	struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
	struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;

	if (hpsa_is_cmd_idle(c))
		return false;

	switch (c->cmd_type) {
	case CMD_SCSI:
	case CMD_IOCTL_PEND:
		match = !memcmp(scsi3addr, &c->Header.LUN.LunAddrBytes,
				sizeof(c->Header.LUN.LunAddrBytes));
		break;

	case CMD_IOACCEL1:
	case CMD_IOACCEL2:
		if (c->phys_disk == dev) {
			/* HBA mode match */
			match = true;
		} else {
			/* Possible RAID mode -- check each phys dev. */
			/* FIXME:  Do we need to take out a lock here?  If
			 * so, we could just call hpsa_get_pdisk_of_ioaccel2()
			 * instead. */
			for (i = 0; i < dev->nphysical_disks && !match; i++) {
				/* FIXME: an alternate test might be
				 *
				 * match = dev->phys_disk[i]->ioaccel_handle
				 *              == c2->scsi_nexus;      */
				match = dev->phys_disk[i] == c->phys_disk;
			}
		}
		break;

	case IOACCEL2_TMF:
		for (i = 0; i < dev->nphysical_disks && !match; i++) {
			match = dev->phys_disk[i]->ioaccel_handle ==
					le32_to_cpu(ac->it_nexus);
		}
		break;

	case 0:		/* The command is in the middle of being initialized. */
		match = false;
		break;

	default:
		dev_err(&h->pdev->dev, "unexpected cmd_type: %d\n",
			c->cmd_type);
		BUG();
	}

	return match;
}

static int hpsa_do_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
	unsigned char *scsi3addr, u8 reset_type, int reply_queue)
{
	int i;
	int rc = 0;

	/* We can really only handle one reset at a time */
	if (mutex_lock_interruptible(&h->reset_mutex) == -EINTR) {
		dev_warn(&h->pdev->dev, "concurrent reset wait interrupted.\n");
		return -EINTR;
	}

	BUG_ON(atomic_read(&dev->reset_cmds_out) != 0);

	for (i = 0; i < h->nr_cmds; i++) {
		struct CommandList *c = h->cmd_pool + i;
		int refcount = atomic_inc_return(&c->refcount);

		if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev, scsi3addr)) {
			unsigned long flags;

			/*
			 * Mark the target command as having a reset pending,
			 * then lock a lock so that the command cannot complete
			 * while we're considering it.  If the command is not
			 * idle then count it; otherwise revoke the event.
			 */
			c->reset_pending = dev;
			spin_lock_irqsave(&h->lock, flags);	/* Implied MB */
			if (!hpsa_is_cmd_idle(c))
				atomic_inc(&dev->reset_cmds_out);
			else
				c->reset_pending = NULL;
			spin_unlock_irqrestore(&h->lock, flags);
		}

		cmd_free(h, c);
	}

	rc = hpsa_send_reset(h, scsi3addr, reset_type, reply_queue);
	if (!rc)
		wait_event(h->event_sync_wait_queue,
			atomic_read(&dev->reset_cmds_out) == 0 ||
			lockup_detected(h));

	if (unlikely(lockup_detected(h))) {
D
Don Brace 已提交
3084 3085 3086 3087
		dev_warn(&h->pdev->dev,
			 "Controller lockup detected during reset wait\n");
		rc = -ENODEV;
	}
W
Webb Scales 已提交
3088 3089 3090

	if (unlikely(rc))
		atomic_set(&dev->reset_cmds_out, 0);
D
Don Brace 已提交
3091 3092
	else
		wait_for_device_to_become_ready(h, scsi3addr, 0);
W
Webb Scales 已提交
3093 3094 3095 3096 3097

	mutex_unlock(&h->reset_mutex);
	return rc;
}

3098 3099 3100 3101 3102 3103 3104 3105 3106 3107
static void hpsa_get_raid_level(struct ctlr_info *h,
	unsigned char *scsi3addr, unsigned char *raid_level)
{
	int rc;
	unsigned char *buf;

	*raid_level = RAID_UNKNOWN;
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
3108 3109 3110 3111 3112 3113 3114 3115

	if (!hpsa_vpd_page_supported(h, scsi3addr,
		HPSA_VPD_LV_DEVICE_GEOMETRY))
		goto exit;

	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
		HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);

3116 3117 3118 3119
	if (rc == 0)
		*raid_level = buf[8];
	if (*raid_level > RAID_UNKNOWN)
		*raid_level = RAID_UNKNOWN;
3120
exit:
3121 3122 3123 3124
	kfree(buf);
	return;
}

3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136
#define HPSA_MAP_DEBUG
#ifdef HPSA_MAP_DEBUG
static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
				struct raid_map_data *map_buff)
{
	struct raid_map_disk_data *dd = &map_buff->data[0];
	int map, row, col;
	u16 map_cnt, row_cnt, disks_per_row;

	if (rc != 0)
		return;

3137 3138 3139 3140
	/* Show details only if debugging has been activated. */
	if (h->raid_offload_debug < 2)
		return;

3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164
	dev_info(&h->pdev->dev, "structure_size = %u\n",
				le32_to_cpu(map_buff->structure_size));
	dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
			le32_to_cpu(map_buff->volume_blk_size));
	dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
			le64_to_cpu(map_buff->volume_blk_cnt));
	dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
			map_buff->phys_blk_shift);
	dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
			map_buff->parity_rotation_shift);
	dev_info(&h->pdev->dev, "strip_size = %u\n",
			le16_to_cpu(map_buff->strip_size));
	dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
			le64_to_cpu(map_buff->disk_starting_blk));
	dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
			le64_to_cpu(map_buff->disk_blk_cnt));
	dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
			le16_to_cpu(map_buff->data_disks_per_row));
	dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
			le16_to_cpu(map_buff->metadata_disks_per_row));
	dev_info(&h->pdev->dev, "row_cnt = %u\n",
			le16_to_cpu(map_buff->row_cnt));
	dev_info(&h->pdev->dev, "layout_map_count = %u\n",
			le16_to_cpu(map_buff->layout_map_count));
D
Don Brace 已提交
3165
	dev_info(&h->pdev->dev, "flags = 0x%x\n",
3166
			le16_to_cpu(map_buff->flags));
D
Don Brace 已提交
3167 3168 3169
	dev_info(&h->pdev->dev, "encrypytion = %s\n",
			le16_to_cpu(map_buff->flags) &
			RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3170 3171
	dev_info(&h->pdev->dev, "dekindex = %u\n",
			le16_to_cpu(map_buff->dekindex));
3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209
	map_cnt = le16_to_cpu(map_buff->layout_map_count);
	for (map = 0; map < map_cnt; map++) {
		dev_info(&h->pdev->dev, "Map%u:\n", map);
		row_cnt = le16_to_cpu(map_buff->row_cnt);
		for (row = 0; row < row_cnt; row++) {
			dev_info(&h->pdev->dev, "  Row%u:\n", row);
			disks_per_row =
				le16_to_cpu(map_buff->data_disks_per_row);
			for (col = 0; col < disks_per_row; col++, dd++)
				dev_info(&h->pdev->dev,
					"    D%02u: h=0x%04x xor=%u,%u\n",
					col, dd->ioaccel_handle,
					dd->xor_mult[0], dd->xor_mult[1]);
			disks_per_row =
				le16_to_cpu(map_buff->metadata_disks_per_row);
			for (col = 0; col < disks_per_row; col++, dd++)
				dev_info(&h->pdev->dev,
					"    M%02u: h=0x%04x xor=%u,%u\n",
					col, dd->ioaccel_handle,
					dd->xor_mult[0], dd->xor_mult[1]);
		}
	}
}
#else
static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
			__attribute__((unused)) int rc,
			__attribute__((unused)) struct raid_map_data *map_buff)
{
}
#endif

static int hpsa_get_raid_map(struct ctlr_info *h,
	unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
{
	int rc = 0;
	struct CommandList *c;
	struct ErrorInfo *ei;

3210
	c = cmd_alloc(h);
3211

3212 3213 3214
	if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
			sizeof(this_device->raid_map), 0,
			scsi3addr, TYPE_CMD)) {
3215 3216 3217
		dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
		cmd_free(h, c);
		return -1;
3218
	}
3219
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3220
					PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3221 3222
	if (rc)
		goto out;
3223 3224
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3225
		hpsa_scsi_interpret_error(h, c);
3226 3227
		rc = -1;
		goto out;
3228
	}
3229
	cmd_free(h, c);
3230 3231 3232 3233 3234 3235 3236 3237 3238

	/* @todo in the future, dynamically allocate RAID map memory */
	if (le32_to_cpu(this_device->raid_map.structure_size) >
				sizeof(this_device->raid_map)) {
		dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
		rc = -1;
	}
	hpsa_debug_map_buff(h, rc, &this_device->raid_map);
	return rc;
3239 3240 3241
out:
	cmd_free(h, c);
	return rc;
3242 3243
}

K
Kevin Barnett 已提交
3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262
static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
		unsigned char scsi3addr[], u16 bmic_device_index,
		struct bmic_sense_subsystem_info *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);

	rc = fill_cmd(c, BMIC_SENSE_SUBSYSTEM_INFORMATION, h, buf, bufsize,
		0, RAID_CTLR_LUNID, TYPE_CMD);
	if (rc)
		goto out;

	c->Request.CDB[2] = bmic_device_index & 0xff;
	c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3263
				PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
K
Kevin Barnett 已提交
3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

S
Scott Teel 已提交
3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290
static int hpsa_bmic_id_controller(struct ctlr_info *h,
	struct bmic_identify_controller *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);

	rc = fill_cmd(c, BMIC_IDENTIFY_CONTROLLER, h, buf, bufsize,
		0, RAID_CTLR_LUNID, TYPE_CMD);
	if (rc)
		goto out;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3291
		PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
S
Scott Teel 已提交
3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320
static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
		unsigned char scsi3addr[], u16 bmic_device_index,
		struct bmic_identify_physical_device *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);
	rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
		0, RAID_CTLR_LUNID, TYPE_CMD);
	if (rc)
		goto out;

	c->Request.CDB[2] = bmic_device_index & 0xff;
	c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;

3321
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3322
						DEFAULT_TIMEOUT);
3323 3324 3325 3326 3327 3328 3329
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
K
Kevin Barnett 已提交
3330

3331 3332 3333
	return rc;
}

3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354
/*
 * get enclosure information
 * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
 * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
 * Uses id_physical_device to determine the box_index.
 */
static void hpsa_get_enclosure_info(struct ctlr_info *h,
			unsigned char *scsi3addr,
			struct ReportExtendedLUNdata *rlep, int rle_index,
			struct hpsa_scsi_dev_t *encl_dev)
{
	int rc = -1;
	struct CommandList *c = NULL;
	struct ErrorInfo *ei = NULL;
	struct bmic_sense_storage_box_params *bssbp = NULL;
	struct bmic_identify_physical_device *id_phys = NULL;
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
	u16 bmic_device_index = 0;

	bmic_device_index = GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]);

3355 3356
	if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
		rc = IO_OK;
3357
		goto out;
3358
	}
3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389

	bssbp = kzalloc(sizeof(*bssbp), GFP_KERNEL);
	if (!bssbp)
		goto out;

	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
	if (!id_phys)
		goto out;

	rc = hpsa_bmic_id_physical_device(h, scsi3addr, bmic_device_index,
						id_phys, sizeof(*id_phys));
	if (rc) {
		dev_warn(&h->pdev->dev, "%s: id_phys failed %d bdi[0x%x]\n",
			__func__, encl_dev->external, bmic_device_index);
		goto out;
	}

	c = cmd_alloc(h);

	rc = fill_cmd(c, BMIC_SENSE_STORAGE_BOX_PARAMS, h, bssbp,
			sizeof(*bssbp), 0, RAID_CTLR_LUNID, TYPE_CMD);

	if (rc)
		goto out;

	if (id_phys->phys_connector[1] == 'E')
		c->Request.CDB[5] = id_phys->box_index;
	else
		c->Request.CDB[5] = 0;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3390
						DEFAULT_TIMEOUT);
3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416
	if (rc)
		goto out;

	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		rc = -1;
		goto out;
	}

	encl_dev->box[id_phys->active_path_number] = bssbp->phys_box_on_port;
	memcpy(&encl_dev->phys_connector[id_phys->active_path_number],
		bssbp->phys_connector, sizeof(bssbp->phys_connector));

	rc = IO_OK;
out:
	kfree(bssbp);
	kfree(id_phys);

	if (c)
		cmd_free(h, c);

	if (rc != IO_OK)
		hpsa_show_dev_msg(KERN_INFO, h, encl_dev,
			"Error, could not get enclosure information\n");
}

K
Kevin Barnett 已提交
3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477
static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
						unsigned char *scsi3addr)
{
	struct ReportExtendedLUNdata *physdev;
	u32 nphysicals;
	u64 sa = 0;
	int i;

	physdev = kzalloc(sizeof(*physdev), GFP_KERNEL);
	if (!physdev)
		return 0;

	if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		kfree(physdev);
		return 0;
	}
	nphysicals = get_unaligned_be32(physdev->LUNListLength) / 24;

	for (i = 0; i < nphysicals; i++)
		if (!memcmp(&physdev->LUN[i].lunid[0], scsi3addr, 8)) {
			sa = get_unaligned_be64(&physdev->LUN[i].wwid[0]);
			break;
		}

	kfree(physdev);

	return sa;
}

static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
					struct hpsa_scsi_dev_t *dev)
{
	int rc;
	u64 sa = 0;

	if (is_hba_lunid(scsi3addr)) {
		struct bmic_sense_subsystem_info *ssi;

		ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
		if (ssi == NULL) {
			dev_warn(&h->pdev->dev,
				"%s: out of memory\n", __func__);
			return;
		}

		rc = hpsa_bmic_sense_subsystem_information(h,
					scsi3addr, 0, ssi, sizeof(*ssi));
		if (rc == 0) {
			sa = get_unaligned_be64(ssi->primary_world_wide_id);
			h->sas_address = sa;
		}

		kfree(ssi);
	} else
		sa = hpsa_get_sas_address_from_report_physical(h, scsi3addr);

	dev->sas_address = sa;
}

/* Get a device id from inquiry page 0x83 */
3478
static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3479 3480 3481 3482 3483 3484 3485 3486 3487
	unsigned char scsi3addr[], u8 page)
{
	int rc;
	int i;
	int pages;
	unsigned char *buf, bufsize;

	buf = kzalloc(256, GFP_KERNEL);
	if (!buf)
3488
		return false;
3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514

	/* Get the size of the page list first */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
				VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
				buf, HPSA_VPD_HEADER_SZ);
	if (rc != 0)
		goto exit_unsupported;
	pages = buf[3];
	if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
		bufsize = pages + HPSA_VPD_HEADER_SZ;
	else
		bufsize = 255;

	/* Get the whole VPD page list */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
				VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
				buf, bufsize);
	if (rc != 0)
		goto exit_unsupported;

	pages = buf[3];
	for (i = 1; i <= pages; i++)
		if (buf[3 + i] == page)
			goto exit_supported;
exit_unsupported:
	kfree(buf);
3515
	return false;
3516 3517
exit_supported:
	kfree(buf);
3518
	return true;
3519 3520
}

3521 3522 3523 3524 3525 3526 3527 3528 3529
static void hpsa_get_ioaccel_status(struct ctlr_info *h,
	unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
{
	int rc;
	unsigned char *buf;
	u8 ioaccel_status;

	this_device->offload_config = 0;
	this_device->offload_enabled = 0;
3530
	this_device->offload_to_be_enabled = 0;
3531 3532 3533 3534

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
3535 3536
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
		goto out;
3537
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3538
			VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553
	if (rc != 0)
		goto out;

#define IOACCEL_STATUS_BYTE 4
#define OFFLOAD_CONFIGURED_BIT 0x01
#define OFFLOAD_ENABLED_BIT 0x02
	ioaccel_status = buf[IOACCEL_STATUS_BYTE];
	this_device->offload_config =
		!!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
	if (this_device->offload_config) {
		this_device->offload_enabled =
			!!(ioaccel_status & OFFLOAD_ENABLED_BIT);
		if (hpsa_get_raid_map(h, scsi3addr, this_device))
			this_device->offload_enabled = 0;
	}
3554
	this_device->offload_to_be_enabled = this_device->offload_enabled;
3555 3556 3557 3558 3559
out:
	kfree(buf);
	return;
}

3560 3561
/* Get the device id from inquiry page 0x83 */
static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
D
Don Brace 已提交
3562
	unsigned char *device_id, int index, int buflen)
3563 3564 3565 3566
{
	int rc;
	unsigned char *buf;

3567 3568 3569 3570
	/* Does controller have VPD for device id? */
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
		return 1; /* not supported */

3571 3572
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
3573
		return -ENOMEM;
3574 3575 3576 3577 3578 3579 3580 3581

	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
					HPSA_VPD_LV_DEVICE_ID, buf, 64);
	if (rc == 0) {
		if (buflen > 16)
			buflen = 16;
		memcpy(device_id, &buf[8], buflen);
	}
D
Don Brace 已提交
3582

3583
	kfree(buf);
D
Don Brace 已提交
3584

3585
	return rc; /*0 - got id,  otherwise, didn't */
3586 3587 3588
}

static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3589
		void *buf, int bufsize,
3590 3591 3592 3593 3594 3595 3596
		int extended_response)
{
	int rc = IO_OK;
	struct CommandList *c;
	unsigned char scsi3addr[8];
	struct ErrorInfo *ei;

3597
	c = cmd_alloc(h);
3598

3599 3600
	/* address the controller */
	memset(scsi3addr, 0, sizeof(scsi3addr));
3601 3602 3603 3604 3605
	if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
		buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
3606 3607
	if (extended_response)
		c->Request.CDB[1] = extended_response;
3608
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3609
					PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3610 3611
	if (rc)
		goto out;
3612 3613 3614
	ei = c->err_info;
	if (ei->CommandStatus != 0 &&
	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
3615
		hpsa_scsi_interpret_error(h, c);
3616
		rc = -1;
3617
	} else {
3618 3619 3620
		struct ReportLUNdata *rld = buf;

		if (rld->extended_response_flag != extended_response) {
3621 3622 3623
			dev_err(&h->pdev->dev,
				"report luns requested format %u, got %u\n",
				extended_response,
3624
				rld->extended_response_flag);
3625 3626
			rc = -1;
		}
3627
	}
3628
out:
3629
	cmd_free(h, c);
3630 3631 3632 3633
	return rc;
}

static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3634
		struct ReportExtendedLUNdata *buf, int bufsize)
3635
{
3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661
	int rc;
	struct ReportLUNdata *lbuf;

	rc = hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
				      HPSA_REPORT_PHYS_EXTENDED);
	if (!rc || !hpsa_allow_any)
		return rc;

	/* REPORT PHYS EXTENDED is not supported */
	lbuf = kzalloc(sizeof(*lbuf), GFP_KERNEL);
	if (!lbuf)
		return -ENOMEM;

	rc = hpsa_scsi_do_report_luns(h, 0, lbuf, sizeof(*lbuf), 0);
	if (!rc) {
		int i;
		u32 nphys;

		/* Copy ReportLUNdata header */
		memcpy(buf, lbuf, 8);
		nphys = be32_to_cpu(*((__be32 *)lbuf->LUNListLength)) / 8;
		for (i = 0; i < nphys; i++)
			memcpy(buf->LUN[i].lunid, lbuf->LUN[i], 8);
	}
	kfree(lbuf);
	return rc;
3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677
}

static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
		struct ReportLUNdata *buf, int bufsize)
{
	return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
}

static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
	int bus, int target, int lun)
{
	device->bus = bus;
	device->target = target;
	device->lun = lun;
}

3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691
/* Use VPD inquiry to get details of volume status */
static int hpsa_get_volume_status(struct ctlr_info *h,
					unsigned char scsi3addr[])
{
	int rc;
	int status;
	int size;
	unsigned char *buf;

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return HPSA_VPD_LV_STATUS_UNSUPPORTED;

	/* Does controller have VPD for logical volume status? */
3692
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3693 3694 3695 3696 3697
		goto exit_failed;

	/* Get the size of the VPD return buffer */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
					buf, HPSA_VPD_HEADER_SZ);
3698
	if (rc != 0)
3699 3700 3701 3702 3703 3704
		goto exit_failed;
	size = buf[3];

	/* Now get the whole VPD buffer */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
					buf, size + HPSA_VPD_HEADER_SZ);
3705
	if (rc != 0)
3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718
		goto exit_failed;
	status = buf[4]; /* status byte */

	kfree(buf);
	return status;
exit_failed:
	kfree(buf);
	return HPSA_VPD_LV_STATUS_UNSUPPORTED;
}

/* Determine offline status of a volume.
 * Return either:
 *  0 (not offline)
3719
 *  0xff (offline for unknown reasons)
3720 3721 3722
 *  # (integer code indicating one of several NOT READY states
 *     describing why a volume is to be kept offline)
 */
3723
static int hpsa_volume_offline(struct ctlr_info *h,
3724 3725 3726
					unsigned char scsi3addr[])
{
	struct CommandList *c;
3727 3728 3729
	unsigned char *sense;
	u8 sense_key, asc, ascq;
	int sense_len;
3730
	int rc, ldstat = 0;
3731 3732 3733 3734 3735 3736 3737
	u16 cmd_status;
	u8 scsi_status;
#define ASC_LUN_NOT_READY 0x04
#define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
#define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02

	c = cmd_alloc(h);
3738

3739
	(void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3740 3741
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
					DEFAULT_TIMEOUT);
3742 3743 3744 3745
	if (rc) {
		cmd_free(h, c);
		return 0;
	}
3746
	sense = c->err_info->SenseInfo;
3747 3748 3749 3750 3751
	if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
		sense_len = sizeof(c->err_info->SenseInfo);
	else
		sense_len = c->err_info->SenseLen;
	decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768
	cmd_status = c->err_info->CommandStatus;
	scsi_status = c->err_info->ScsiStatus;
	cmd_free(h, c);
	/* Is the volume 'not ready'? */
	if (cmd_status != CMD_TARGET_STATUS ||
		scsi_status != SAM_STAT_CHECK_CONDITION ||
		sense_key != NOT_READY ||
		asc != ASC_LUN_NOT_READY)  {
		return 0;
	}

	/* Determine the reason for not ready state */
	ldstat = hpsa_get_volume_status(h, scsi3addr);

	/* Keep volume offline in certain cases: */
	switch (ldstat) {
	case HPSA_LV_UNDERGOING_ERASE:
S
Scott Benesh 已提交
3769
	case HPSA_LV_NOT_AVAILABLE:
3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791
	case HPSA_LV_UNDERGOING_RPI:
	case HPSA_LV_PENDING_RPI:
	case HPSA_LV_ENCRYPTED_NO_KEY:
	case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
	case HPSA_LV_UNDERGOING_ENCRYPTION:
	case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
	case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
		return ldstat;
	case HPSA_VPD_LV_STATUS_UNSUPPORTED:
		/* If VPD status page isn't available,
		 * use ASC/ASCQ to determine state
		 */
		if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
			(ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
			return ldstat;
		break;
	default:
		break;
	}
	return 0;
}

S
Stephen Cameron 已提交
3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813
/*
 * Find out if a logical device supports aborts by simply trying one.
 * Smart Array may claim not to support aborts on logical drives, but
 * if a MSA2000 * is connected, the drives on that will be presented
 * by the Smart Array as logical drives, and aborts may be sent to
 * those devices successfully.  So the simplest way to find out is
 * to simply try an abort and see how the device responds.
 */
static int hpsa_device_supports_aborts(struct ctlr_info *h,
					unsigned char *scsi3addr)
{
	struct CommandList *c;
	struct ErrorInfo *ei;
	int rc = 0;

	u64 tag = (u64) -1; /* bogus tag */

	/* Assume that physical devices support aborts */
	if (!is_logical_dev_addr_mode(scsi3addr))
		return 1;

	c = cmd_alloc(h);
3814

S
Stephen Cameron 已提交
3815
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
3816 3817
	(void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
					DEFAULT_TIMEOUT);
S
Stephen Cameron 已提交
3818 3819 3820 3821 3822 3823 3824 3825 3826 3827
	/* no unmap needed here because no data xfer. */
	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_INVALID:
		rc = 0;
		break;
	case CMD_UNABORTABLE:
	case CMD_ABORT_FAILED:
		rc = 1;
		break;
3828 3829 3830
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
S
Stephen Cameron 已提交
3831 3832 3833 3834 3835 3836 3837 3838
	default:
		rc = 0;
		break;
	}
	cmd_free(h, c);
	return rc;
}

3839
static int hpsa_update_device_info(struct ctlr_info *h,
3840 3841
	unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
	unsigned char *is_OBDR_device)
3842
{
3843 3844 3845 3846 3847 3848

#define OBDR_SIG_OFFSET 43
#define OBDR_TAPE_SIG "$DR-10"
#define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
#define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)

3849
	unsigned char *inq_buff;
3850
	unsigned char *obdr_sig;
3851
	int rc = 0;
3852

3853
	inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3854 3855
	if (!inq_buff) {
		rc = -ENOMEM;
3856
		goto bail_out;
3857
	}
3858 3859 3860 3861 3862 3863 3864

	/* Do an inquiry to the device to see what it is. */
	if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
		(unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
		/* Inquiry failed (msg printed already) */
		dev_err(&h->pdev->dev,
			"hpsa_update_device_info: inquiry failed\n");
3865
		rc = -EIO;
3866 3867 3868
		goto bail_out;
	}

3869 3870
	scsi_sanitize_inquiry_string(&inq_buff[8], 8);
	scsi_sanitize_inquiry_string(&inq_buff[16], 16);
D
Don Brace 已提交
3871

3872 3873 3874 3875 3876 3877
	this_device->devtype = (inq_buff[0] & 0x1f);
	memcpy(this_device->scsi3addr, scsi3addr, 8);
	memcpy(this_device->vendor, &inq_buff[8],
		sizeof(this_device->vendor));
	memcpy(this_device->model, &inq_buff[16],
		sizeof(this_device->model));
3878
	this_device->rev = inq_buff[2];
3879 3880
	memset(this_device->device_id, 0,
		sizeof(this_device->device_id));
3881 3882 3883 3884 3885 3886 3887 3888 3889
	if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
		sizeof(this_device->device_id)))
		dev_err(&h->pdev->dev,
			"hpsa%d: %s: can't get device id for host %d:C0:T%d:L%d\t%s\t%.16s\n",
			h->ctlr, __func__,
			h->scsi_host->host_no,
			this_device->target, this_device->lun,
			scsi_device_type(this_device->devtype),
			this_device->model);
3890

D
Don Brace 已提交
3891 3892
	if ((this_device->devtype == TYPE_DISK ||
		this_device->devtype == TYPE_ZBC) &&
3893
		is_logical_dev_addr_mode(scsi3addr)) {
3894 3895
		int volume_offline;

3896
		hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3897 3898
		if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
			hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3899 3900 3901 3902
		volume_offline = hpsa_volume_offline(h, scsi3addr);
		if (volume_offline < 0 || volume_offline > 0xff)
			volume_offline = HPSA_VPD_LV_STATUS_UNSUPPORTED;
		this_device->volume_offline = volume_offline & 0xff;
3903
	} else {
3904
		this_device->raid_level = RAID_UNKNOWN;
3905 3906
		this_device->offload_config = 0;
		this_device->offload_enabled = 0;
3907
		this_device->offload_to_be_enabled = 0;
3908
		this_device->hba_ioaccel_enabled = 0;
3909
		this_device->volume_offline = 0;
3910
		this_device->queue_depth = h->nr_cmds;
3911
	}
3912

3913 3914 3915 3916 3917 3918 3919 3920 3921
	if (is_OBDR_device) {
		/* See if this is a One-Button-Disaster-Recovery device
		 * by looking for "$DR-10" at offset 43 in inquiry data.
		 */
		obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
		*is_OBDR_device = (this_device->devtype == TYPE_ROM &&
					strncmp(obdr_sig, OBDR_TAPE_SIG,
						OBDR_SIG_LEN) == 0);
	}
3922 3923 3924 3925 3926
	kfree(inq_buff);
	return 0;

bail_out:
	kfree(inq_buff);
3927
	return rc;
3928 3929
}

S
Stephen Cameron 已提交
3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954
static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
			struct hpsa_scsi_dev_t *dev, u8 *scsi3addr)
{
	unsigned long flags;
	int rc, entry;
	/*
	 * See if this device supports aborts.  If we already know
	 * the device, we already know if it supports aborts, otherwise
	 * we have to find out if it supports aborts by trying one.
	 */
	spin_lock_irqsave(&h->devlock, flags);
	rc = hpsa_scsi_find_entry(dev, h->dev, h->ndevices, &entry);
	if ((rc == DEVICE_SAME || rc == DEVICE_UPDATED) &&
		entry >= 0 && entry < h->ndevices) {
		dev->supports_aborts = h->dev[entry]->supports_aborts;
		spin_unlock_irqrestore(&h->devlock, flags);
	} else {
		spin_unlock_irqrestore(&h->devlock, flags);
		dev->supports_aborts =
				hpsa_device_supports_aborts(h, scsi3addr);
		if (dev->supports_aborts < 0)
			dev->supports_aborts = 0;
	}
}

3955 3956
/*
 * Helper function to assign bus, target, lun mapping of devices.
3957 3958 3959
 * Logical drive target and lun are assigned at this time, but
 * physical device lun and target assignment are deferred (assigned
 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
3960
*/
3961
static void figure_bus_target_lun(struct ctlr_info *h,
3962
	u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
3963
{
3964
	u32 lunid = get_unaligned_le32(lunaddrbytes);
3965 3966 3967

	if (!is_logical_dev_addr_mode(lunaddrbytes)) {
		/* physical device, target and lun filled in later */
3968 3969 3970 3971 3972
		if (is_hba_lunid(lunaddrbytes)) {
			int bus = HPSA_HBA_BUS;

			if (!device->rev)
				bus = HPSA_LEGACY_HBA_BUS;
3973
			hpsa_set_bus_target_lun(device,
3974 3975
					bus, 0, lunid & 0x3fff);
		} else
3976
			/* defer target, lun assignment for physical devices */
3977 3978
			hpsa_set_bus_target_lun(device,
					HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
3979 3980 3981
		return;
	}
	/* It's a logical device */
S
Scott Teel 已提交
3982
	if (device->external) {
3983
		hpsa_set_bus_target_lun(device,
3984 3985
			HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
			lunid & 0x00ff);
3986
		return;
3987
	}
3988 3989
	hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
				0, lunid & 0x3fff);
3990 3991 3992
}


3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003
/*
 * Get address of physical disk used for an ioaccel2 mode command:
 *	1. Extract ioaccel2 handle from the command.
 *	2. Find a matching ioaccel2 handle from list of physical disks.
 *	3. Return:
 *		1 and set scsi3addr to address of matching physical
 *		0 if no matching physical disk was found.
 */
static int hpsa_get_pdisk_of_ioaccel2(struct ctlr_info *h,
	struct CommandList *ioaccel2_cmd_to_abort, unsigned char *scsi3addr)
{
4004 4005 4006
	struct io_accel2_cmd *c2 =
			&h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
	unsigned long flags;
4007 4008
	int i;

4009 4010 4011 4012 4013 4014 4015 4016 4017 4018
	spin_lock_irqsave(&h->devlock, flags);
	for (i = 0; i < h->ndevices; i++)
		if (h->dev[i]->ioaccel_handle == le32_to_cpu(c2->scsi_nexus)) {
			memcpy(scsi3addr, h->dev[i]->scsi3addr,
				sizeof(h->dev[i]->scsi3addr));
			spin_unlock_irqrestore(&h->devlock, flags);
			return 1;
		}
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
4019
}
4020

S
Scott Teel 已提交
4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041
static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlocal_logicals)
{
	/* In report logicals, local logicals are listed first,
	* then any externals.
	*/
	int logicals_start = nphysicals + (raid_ctlr_position == 0);

	if (i == raid_ctlr_position)
		return 0;

	if (i < logicals_start)
		return 0;

	/* i is in logicals range, but still within local logicals */
	if ((i - nphysicals - (raid_ctlr_position == 0)) < nlocal_logicals)
		return 0;

	return 1; /* it's an external lun */
}

4042 4043 4044 4045 4046 4047 4048
/*
 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
 * logdev.  The number of luns in physdev and logdev are returned in
 * *nphysicals and *nlogicals, respectively.
 * Returns 0 on success, -1 otherwise.
 */
static int hpsa_gather_lun_info(struct ctlr_info *h,
4049
	struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4050
	struct ReportLUNdata *logdev, u32 *nlogicals)
4051
{
4052
	if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4053 4054 4055
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		return -1;
	}
4056
	*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4057
	if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4058 4059
		dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
			HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4060 4061
		*nphysicals = HPSA_MAX_PHYS_LUN;
	}
4062
	if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4063 4064 4065
		dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
		return -1;
	}
4066
	*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084
	/* Reject Logicals in excess of our max capability. */
	if (*nlogicals > HPSA_MAX_LUN) {
		dev_warn(&h->pdev->dev,
			"maximum logical LUNs (%d) exceeded.  "
			"%d LUNs ignored.\n", HPSA_MAX_LUN,
			*nlogicals - HPSA_MAX_LUN);
			*nlogicals = HPSA_MAX_LUN;
	}
	if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
		dev_warn(&h->pdev->dev,
			"maximum logical + physical LUNs (%d) exceeded. "
			"%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
			*nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
		*nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
	}
	return 0;
}

D
Don Brace 已提交
4085 4086
static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlogicals,
4087
	struct ReportExtendedLUNdata *physdev_list,
4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101
	struct ReportLUNdata *logdev_list)
{
	/* Helper function, figure out where the LUN ID info is coming from
	 * given index i, lists of physical and logical devices, where in
	 * the list the raid controller is supposed to appear (first or last)
	 */

	int logicals_start = nphysicals + (raid_ctlr_position == 0);
	int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);

	if (i == raid_ctlr_position)
		return RAID_CTLR_LUNID;

	if (i < logicals_start)
4102 4103
		return &physdev_list->LUN[i -
				(raid_ctlr_position == 0)].lunid[0];
4104 4105 4106 4107 4108 4109 4110 4111

	if (i < last_device)
		return &logdev_list->LUN[i - nphysicals -
			(raid_ctlr_position == 0)][0];
	BUG();
	return NULL;
}

4112 4113 4114
/* get physical drive ioaccel handle and queue depth */
static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
		struct hpsa_scsi_dev_t *dev,
4115
		struct ReportExtendedLUNdata *rlep, int rle_index,
4116 4117 4118
		struct bmic_identify_physical_device *id_phys)
{
	int rc;
4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129
	struct ext_report_lun_entry *rle;

	/*
	 * external targets don't support BMIC
	 */
	if (dev->external) {
		dev->queue_depth = 7;
		return;
	}

	rle = &rlep->LUN[rle_index];
4130 4131

	dev->ioaccel_handle = rle->ioaccel_handle;
4132
	if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4133
		dev->hba_ioaccel_enabled = 1;
4134
	memset(id_phys, 0, sizeof(*id_phys));
4135 4136
	rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
			GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148
			sizeof(*id_phys));
	if (!rc)
		/* Reserve space for FW operations */
#define DRIVE_CMDS_RESERVED_FOR_FW 2
#define DRIVE_QUEUE_DEPTH 7
		dev->queue_depth =
			le16_to_cpu(id_phys->current_queue_depth_limit) -
				DRIVE_CMDS_RESERVED_FOR_FW;
	else
		dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
}

4149
static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4150
	struct ReportExtendedLUNdata *rlep, int rle_index,
4151 4152
	struct bmic_identify_physical_device *id_phys)
{
4153 4154 4155
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];

	if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174
		this_device->hba_ioaccel_enabled = 1;

	memcpy(&this_device->active_path_index,
		&id_phys->active_path_number,
		sizeof(this_device->active_path_index));
	memcpy(&this_device->path_map,
		&id_phys->redundant_path_present_map,
		sizeof(this_device->path_map));
	memcpy(&this_device->box,
		&id_phys->alternate_paths_phys_box_on_port,
		sizeof(this_device->box));
	memcpy(&this_device->phys_connector,
		&id_phys->alternate_paths_phys_connector,
		sizeof(this_device->phys_connector));
	memcpy(&this_device->bay,
		&id_phys->phys_bay_in_box,
		sizeof(this_device->bay));
}

S
Scott Teel 已提交
4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199
/* get number of local logical disks. */
static int hpsa_set_local_logical_count(struct ctlr_info *h,
	struct bmic_identify_controller *id_ctlr,
	u32 *nlocals)
{
	int rc;

	if (!id_ctlr) {
		dev_warn(&h->pdev->dev, "%s: id_ctlr buffer is NULL.\n",
			__func__);
		return -ENOMEM;
	}
	memset(id_ctlr, 0, sizeof(*id_ctlr));
	rc = hpsa_bmic_id_controller(h, id_ctlr, sizeof(*id_ctlr));
	if (!rc)
		if (id_ctlr->configured_logical_drive_count < 256)
			*nlocals = id_ctlr->configured_logical_drive_count;
		else
			*nlocals = le16_to_cpu(
					id_ctlr->extended_logical_unit_count);
	else
		*nlocals = -1;
	return rc;
}

4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263
static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
{
	struct bmic_identify_physical_device *id_phys;
	bool is_spare = false;
	int rc;

	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
	if (!id_phys)
		return false;

	rc = hpsa_bmic_id_physical_device(h,
					lunaddrbytes,
					GET_BMIC_DRIVE_NUMBER(lunaddrbytes),
					id_phys, sizeof(*id_phys));
	if (rc == 0)
		is_spare = (id_phys->more_flags >> 6) & 0x01;

	kfree(id_phys);
	return is_spare;
}

#define RPL_DEV_FLAG_NON_DISK                           0x1
#define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED  0x2
#define RPL_DEV_FLAG_UNCONFIG_DISK                      0x4

#define BMIC_DEVICE_TYPE_ENCLOSURE  6

static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes,
				struct ext_report_lun_entry *rle)
{
	u8 device_flags;
	u8 device_type;

	if (!MASKED_DEVICE(lunaddrbytes))
		return false;

	device_flags = rle->device_flags;
	device_type = rle->device_type;

	if (device_flags & RPL_DEV_FLAG_NON_DISK) {
		if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE)
			return false;
		return true;
	}

	if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED))
		return false;

	if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
		return false;

	/*
	 * Spares may be spun down, we do not want to
	 * do an Inquiry to a RAID set spare drive as
	 * that would have them spun up, that is a
	 * performance hit because I/O to the RAID device
	 * stops while the spin up occurs which can take
	 * over 50 seconds.
	 */
	if (hpsa_is_disk_spare(h, lunaddrbytes))
		return true;

	return false;
}
S
Scott Teel 已提交
4264

D
Don Brace 已提交
4265
static void hpsa_update_scsi_devices(struct ctlr_info *h)
4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276
{
	/* the idea here is we could get notified
	 * that some devices have changed, so we do a report
	 * physical luns and report logical luns cmd, and adjust
	 * our list of devices accordingly.
	 *
	 * The scsi3addr's of devices won't change so long as the
	 * adapter is not reset.  That means we can rescan and
	 * tell which devices we already know about, vs. new
	 * devices, vs.  disappearing devices.
	 */
4277
	struct ReportExtendedLUNdata *physdev_list = NULL;
4278
	struct ReportLUNdata *logdev_list = NULL;
4279
	struct bmic_identify_physical_device *id_phys = NULL;
S
Scott Teel 已提交
4280
	struct bmic_identify_controller *id_ctlr = NULL;
4281 4282
	u32 nphysicals = 0;
	u32 nlogicals = 0;
S
Scott Teel 已提交
4283
	u32 nlocal_logicals = 0;
4284
	u32 ndev_allocated = 0;
4285 4286
	struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
	int ncurrent = 0;
4287
	int i, n_ext_target_devs, ndevs_to_allocate;
4288
	int raid_ctlr_position;
K
Kevin Barnett 已提交
4289
	bool physical_device;
4290
	DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4291

4292
	currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
4293 4294
	physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
	logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4295
	tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4296
	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
S
Scott Teel 已提交
4297
	id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4298

4299
	if (!currentsd || !physdev_list || !logdev_list ||
S
Scott Teel 已提交
4300
		!tmpdevice || !id_phys || !id_ctlr) {
4301 4302 4303 4304 4305
		dev_err(&h->pdev->dev, "out of memory\n");
		goto out;
	}
	memset(lunzerobits, 0, sizeof(lunzerobits));

D
Don Brace 已提交
4306 4307
	h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */

4308
	if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
D
Don Brace 已提交
4309 4310
			logdev_list, &nlogicals)) {
		h->drv_req_rescan = 1;
4311
		goto out;
D
Don Brace 已提交
4312
	}
4313

S
Scott Teel 已提交
4314 4315 4316 4317 4318 4319
	/* Set number of local logicals (non PTRAID) */
	if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
		dev_warn(&h->pdev->dev,
			"%s: Can't determine number of local logical devices.\n",
			__func__);
	}
4320

4321 4322 4323
	/* We might see up to the maximum number of logical and physical disks
	 * plus external target devices, and a device for the local RAID
	 * controller.
4324
	 */
4325
	ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4326 4327 4328

	/* Allocate the per device structures */
	for (i = 0; i < ndevs_to_allocate; i++) {
4329 4330 4331 4332 4333 4334 4335
		if (i >= HPSA_MAX_DEVICES) {
			dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
				"  %d devices ignored.\n", HPSA_MAX_DEVICES,
				ndevs_to_allocate - HPSA_MAX_DEVICES);
			break;
		}

4336 4337 4338 4339
		currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
		if (!currentsd[i]) {
			dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
				__FILE__, __LINE__);
D
Don Brace 已提交
4340
			h->drv_req_rescan = 1;
4341 4342 4343 4344 4345
			goto out;
		}
		ndev_allocated++;
	}

4346
	if (is_scsi_rev_5(h))
4347 4348 4349 4350
		raid_ctlr_position = 0;
	else
		raid_ctlr_position = nphysicals + nlogicals;

4351
	/* adjust our table of devices */
4352
	n_ext_target_devs = 0;
4353
	for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4354
		u8 *lunaddrbytes, is_OBDR = 0;
4355
		int rc = 0;
4356
		int phys_dev_index = i - (raid_ctlr_position == 0);
4357
		bool skip_device = false;
4358

K
Kevin Barnett 已提交
4359
		physical_device = i < nphysicals + (raid_ctlr_position == 0);
4360 4361

		/* Figure out where the LUN ID info is coming from */
4362 4363
		lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
			i, nphysicals, nlogicals, physdev_list, logdev_list);
4364

4365 4366 4367 4368 4369
		/* Determine if this is a lun from an external target array */
		tmpdevice->external =
			figure_external_status(h, raid_ctlr_position, i,
						nphysicals, nlocal_logicals);

4370 4371 4372 4373 4374 4375 4376 4377 4378
		/*
		 * Skip over some devices such as a spare.
		 */
		if (!tmpdevice->external && physical_device) {
			skip_device = hpsa_skip_device(h, lunaddrbytes,
					&physdev_list->LUN[phys_dev_index]);
			if (skip_device)
				continue;
		}
4379 4380

		/* Get device type, vendor, model, device id */
4381 4382 4383 4384 4385
		rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
							&is_OBDR);
		if (rc == -ENOMEM) {
			dev_warn(&h->pdev->dev,
				"Out of memory, rescan deferred.\n");
D
Don Brace 已提交
4386
			h->drv_req_rescan = 1;
4387
			goto out;
D
Don Brace 已提交
4388
		}
4389 4390 4391 4392 4393 4394
		if (rc) {
			dev_warn(&h->pdev->dev,
				"Inquiry failed, skipping device.\n");
			continue;
		}

4395
		figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
S
Stephen Cameron 已提交
4396
		hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
4397 4398
		this_device = currentsd[ncurrent];

4399 4400
		/* Turn on discovery_polling if there are ext target devices.
		 * Event-based change notification is unreliable for those.
4401
		 */
4402 4403 4404 4405 4406 4407
		if (!h->discovery_polling) {
			if (tmpdevice->external) {
				h->discovery_polling = 1;
				dev_info(&h->pdev->dev,
					"External target, activate discovery polling.\n");
			}
4408 4409
		}

4410

4411
		*this_device = *tmpdevice;
K
Kevin Barnett 已提交
4412
		this_device->physical_device = physical_device;
4413

K
Kevin Barnett 已提交
4414 4415 4416 4417 4418
		/*
		 * Expose all devices except for physical devices that
		 * are masked.
		 */
		if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4419 4420 4421
			this_device->expose_device = 0;
		else
			this_device->expose_device = 1;
4422

K
Kevin Barnett 已提交
4423 4424 4425 4426 4427 4428

		/*
		 * Get the SAS address for physical devices that are exposed.
		 */
		if (this_device->physical_device && this_device->expose_device)
			hpsa_get_sas_address(h, lunaddrbytes, this_device);
4429

4430
		switch (this_device->devtype) {
4431
		case TYPE_ROM:
4432 4433 4434 4435 4436 4437 4438
			/* We don't *really* support actual CD-ROM devices,
			 * just "One Button Disaster Recovery" tape drive
			 * which temporarily pretends to be a CD-ROM drive.
			 * So we check that the device is really an OBDR tape
			 * device by checking for "$DR-10" in bytes 43-48 of
			 * the inquiry data.
			 */
4439 4440
			if (is_OBDR)
				ncurrent++;
4441 4442
			break;
		case TYPE_DISK:
D
Don Brace 已提交
4443
		case TYPE_ZBC:
K
Kevin Barnett 已提交
4444
			if (this_device->physical_device) {
4445 4446
				/* The disk is in HBA mode. */
				/* Never use RAID mapper in HBA mode. */
4447
				this_device->offload_enabled = 0;
4448
				hpsa_get_ioaccel_drive_info(h, this_device,
4449 4450 4451
					physdev_list, phys_dev_index, id_phys);
				hpsa_get_path_info(this_device,
					physdev_list, phys_dev_index, id_phys);
4452
			}
4453
			ncurrent++;
4454 4455 4456
			break;
		case TYPE_TAPE:
		case TYPE_MEDIUM_CHANGER:
4457 4458
			ncurrent++;
			break;
4459
		case TYPE_ENCLOSURE:
4460 4461
			if (!this_device->external)
				hpsa_get_enclosure_info(h, lunaddrbytes,
4462 4463
						physdev_list, phys_dev_index,
						this_device);
4464
			ncurrent++;
4465
			break;
4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478
		case TYPE_RAID:
			/* Only present the Smartarray HBA as a RAID controller.
			 * If it's a RAID controller other than the HBA itself
			 * (an external RAID controller, MSA500 or similar)
			 * don't present it.
			 */
			if (!is_hba_lunid(lunaddrbytes))
				break;
			ncurrent++;
			break;
		default:
			break;
		}
4479
		if (ncurrent >= HPSA_MAX_DEVICES)
4480 4481
			break;
	}
K
Kevin Barnett 已提交
4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493

	if (h->sas_host == NULL) {
		int rc = 0;

		rc = hpsa_add_sas_host(h);
		if (rc) {
			dev_warn(&h->pdev->dev,
				"Could not add sas host %d\n", rc);
			goto out;
		}
	}

D
Don Brace 已提交
4494
	adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4495 4496 4497 4498 4499 4500 4501
out:
	kfree(tmpdevice);
	for (i = 0; i < ndev_allocated; i++)
		kfree(currentsd[i]);
	kfree(currentsd);
	kfree(physdev_list);
	kfree(logdev_list);
S
Scott Teel 已提交
4502
	kfree(id_ctlr);
4503
	kfree(id_phys);
4504 4505
}

4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516
static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
				   struct scatterlist *sg)
{
	u64 addr64 = (u64) sg_dma_address(sg);
	unsigned int len = sg_dma_len(sg);

	desc->Addr = cpu_to_le64(addr64);
	desc->Len = cpu_to_le32(len);
	desc->Ext = 0;
}

4517 4518
/*
 * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4519 4520 4521
 * dma mapping  and fills in the scatter gather entries of the
 * hpsa command, cp.
 */
4522
static int hpsa_scatter_gather(struct ctlr_info *h,
4523 4524 4525 4526
		struct CommandList *cp,
		struct scsi_cmnd *cmd)
{
	struct scatterlist *sg;
4527
	int use_sg, i, sg_limit, chained, last_sg;
4528
	struct SGDescriptor *curr_sg;
4529

4530
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4531 4532 4533 4534 4535 4536 4537 4538

	use_sg = scsi_dma_map(cmd);
	if (use_sg < 0)
		return use_sg;

	if (!use_sg)
		goto sglist_finished;

4539 4540 4541 4542 4543 4544 4545
	/*
	 * If the number of entries is greater than the max for a single list,
	 * then we have a chained list; we will set up all but one entry in the
	 * first list (the last entry is saved for link information);
	 * otherwise, we don't have a chained list and we'll set up at each of
	 * the entries in the one list.
	 */
4546
	curr_sg = cp->SG;
4547 4548 4549 4550
	chained = use_sg > h->max_cmd_sg_entries;
	sg_limit = chained ? h->max_cmd_sg_entries - 1 : use_sg;
	last_sg = scsi_sg_count(cmd) - 1;
	scsi_for_each_sg(cmd, sg, sg_limit, i) {
4551
		hpsa_set_sg_descriptor(curr_sg, sg);
4552 4553
		curr_sg++;
	}
4554

4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569
	if (chained) {
		/*
		 * Continue with the chained list.  Set curr_sg to the chained
		 * list.  Modify the limit to the total count less the entries
		 * we've already set up.  Resume the scan at the list entry
		 * where the previous loop left off.
		 */
		curr_sg = h->cmd_sg_list[cp->cmdindex];
		sg_limit = use_sg - sg_limit;
		for_each_sg(sg, sg, sg_limit, i) {
			hpsa_set_sg_descriptor(curr_sg, sg);
			curr_sg++;
		}
	}

4570
	/* Back the pointer up to the last entry and mark it as "last". */
4571
	(curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4572 4573 4574 4575 4576 4577

	if (use_sg + chained > h->maxSG)
		h->maxSG = use_sg + chained;

	if (chained) {
		cp->Header.SGList = h->max_cmd_sg_entries;
4578
		cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4579 4580 4581 4582
		if (hpsa_map_sg_chain_block(h, cp)) {
			scsi_dma_unmap(cmd);
			return -1;
		}
4583
		return 0;
4584 4585 4586 4587
	}

sglist_finished:

4588
	cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4589
	cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4590 4591 4592
	return 0;
}

4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607
#define IO_ACCEL_INELIGIBLE (1)
static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
{
	int is_write = 0;
	u32 block;
	u32 block_cnt;

	/* Perform some CDB fixups if needed using 10 byte reads/writes only */
	switch (cdb[0]) {
	case WRITE_6:
	case WRITE_12:
		is_write = 1;
	case READ_6:
	case READ_12:
		if (*cdb_len == 6) {
4608 4609 4610
			block = (((cdb[1] & 0x1F) << 16) |
				(cdb[2] << 8) |
				cdb[3]);
4611
			block_cnt = cdb[4];
4612 4613
			if (block_cnt == 0)
				block_cnt = 256;
4614 4615
		} else {
			BUG_ON(*cdb_len != 12);
4616 4617
			block = get_unaligned_be32(&cdb[2]);
			block_cnt = get_unaligned_be32(&cdb[6]);
4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637
		}
		if (block_cnt > 0xffff)
			return IO_ACCEL_INELIGIBLE;

		cdb[0] = is_write ? WRITE_10 : READ_10;
		cdb[1] = 0;
		cdb[2] = (u8) (block >> 24);
		cdb[3] = (u8) (block >> 16);
		cdb[4] = (u8) (block >> 8);
		cdb[5] = (u8) (block);
		cdb[6] = 0;
		cdb[7] = (u8) (block_cnt >> 8);
		cdb[8] = (u8) (block_cnt);
		cdb[9] = 0;
		*cdb_len = 10;
		break;
	}
	return 0;
}

4638
static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4639
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4640
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
	unsigned int len;
	unsigned int total_len = 0;
	struct scatterlist *sg;
	u64 addr64;
	int use_sg, i;
	struct SGDescriptor *curr_sg;
	u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;

4652
	/* TODO: implement chaining support */
4653 4654
	if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4655
		return IO_ACCEL_INELIGIBLE;
4656
	}
4657

4658 4659
	BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);

4660 4661
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4662
		return IO_ACCEL_INELIGIBLE;
4663
	}
4664

4665 4666 4667 4668 4669 4670 4671 4672
	c->cmd_type = CMD_IOACCEL1;

	/* Adjust the DMA address to point to the accelerated command buffer */
	c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
				(c->cmdindex * sizeof(*cp));
	BUG_ON(c->busaddr & 0x0000007F);

	use_sg = scsi_dma_map(cmd);
4673 4674
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4675
		return use_sg;
4676
	}
4677 4678 4679 4680 4681 4682 4683

	if (use_sg) {
		curr_sg = cp->SG;
		scsi_for_each_sg(cmd, sg, use_sg, i) {
			addr64 = (u64) sg_dma_address(sg);
			len  = sg_dma_len(sg);
			total_len += len;
4684 4685 4686
			curr_sg->Addr = cpu_to_le64(addr64);
			curr_sg->Len = cpu_to_le32(len);
			curr_sg->Ext = cpu_to_le32(0);
4687 4688
			curr_sg++;
		}
4689
		(--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710

		switch (cmd->sc_data_direction) {
		case DMA_TO_DEVICE:
			control |= IOACCEL1_CONTROL_DATA_OUT;
			break;
		case DMA_FROM_DEVICE:
			control |= IOACCEL1_CONTROL_DATA_IN;
			break;
		case DMA_NONE:
			control |= IOACCEL1_CONTROL_NODATAXFER;
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
			cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
		control |= IOACCEL1_CONTROL_NODATAXFER;
	}

4711
	c->Header.SGList = use_sg;
4712
	/* Fill out the command structure to submit */
D
Don Brace 已提交
4713 4714 4715 4716 4717
	cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
	cp->transfer_len = cpu_to_le32(total_len);
	cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
			(cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
	cp->control = cpu_to_le32(control);
4718 4719
	memcpy(cp->CDB, cdb, cdb_len);
	memcpy(cp->CISS_LUN, scsi3addr, 8);
4720
	/* Tag was already set at init time. */
4721
	enqueue_cmd_and_start_io(h, c);
4722 4723
	return 0;
}
4724

4725 4726 4727 4728 4729 4730 4731 4732 4733 4734
/*
 * Queue a command directly to a device behind the controller using the
 * I/O accelerator path.
 */
static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
	struct CommandList *c)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;

4735 4736 4737
	if (!dev)
		return -1;

4738 4739
	c->phys_disk = dev;

4740
	return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4741
		cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4742 4743
}

4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755
/*
 * Set encryption parameters for the ioaccel2 request
 */
static void set_encrypt_ioaccel2(struct ctlr_info *h,
	struct CommandList *c, struct io_accel2_cmd *cp)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	struct raid_map_data *map = &dev->raid_map;
	u64 first_block;

	/* Are we doing encryption on this device */
D
Don Brace 已提交
4756
	if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770
		return;
	/* Set the data encryption key index. */
	cp->dekindex = map->dekindex;

	/* Set the encryption enable flag, encoded into direction field. */
	cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;

	/* Set encryption tweak values based on logical block address
	 * If block size is 512, tweak value is LBA.
	 * For other block sizes, tweak is (LBA * block size)/ 512)
	 */
	switch (cmd->cmnd[0]) {
	/* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
	case READ_6:
4771 4772 4773 4774
	case WRITE_6:
		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
				(cmd->cmnd[2] << 8) |
				cmd->cmnd[3]);
4775 4776 4777 4778 4779 4780
		break;
	case WRITE_10:
	case READ_10:
	/* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
	case WRITE_12:
	case READ_12:
D
Don Brace 已提交
4781
		first_block = get_unaligned_be32(&cmd->cmnd[2]);
4782 4783 4784
		break;
	case WRITE_16:
	case READ_16:
D
Don Brace 已提交
4785
		first_block = get_unaligned_be64(&cmd->cmnd[2]);
4786 4787 4788
		break;
	default:
		dev_err(&h->pdev->dev,
D
Don Brace 已提交
4789 4790
			"ERROR: %s: size (0x%x) not supported for encryption\n",
			__func__, cmd->cmnd[0]);
4791 4792 4793
		BUG();
		break;
	}
D
Don Brace 已提交
4794 4795 4796 4797 4798 4799 4800

	if (le32_to_cpu(map->volume_blk_size) != 512)
		first_block = first_block *
				le32_to_cpu(map->volume_blk_size)/512;

	cp->tweak_lower = cpu_to_le32(first_block);
	cp->tweak_upper = cpu_to_le32(first_block >> 32);
4801 4802
}

4803 4804
static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4805
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4806 4807 4808 4809 4810 4811 4812 4813 4814 4815
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
	struct ioaccel2_sg_element *curr_sg;
	int use_sg, i;
	struct scatterlist *sg;
	u64 addr64;
	u32 len;
	u32 total_len = 0;

4816 4817 4818 4819 4820 4821
	if (!cmd->device)
		return -1;

	if (!cmd->device->hostdata)
		return -1;

4822
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4823

4824 4825
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4826
		return IO_ACCEL_INELIGIBLE;
4827 4828
	}

4829 4830 4831 4832 4833 4834 4835 4836 4837 4838
	c->cmd_type = CMD_IOACCEL2;
	/* Adjust the DMA address to point to the accelerated command buffer */
	c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
				(c->cmdindex * sizeof(*cp));
	BUG_ON(c->busaddr & 0x0000007F);

	memset(cp, 0, sizeof(*cp));
	cp->IU_type = IOACCEL2_IU_TYPE;

	use_sg = scsi_dma_map(cmd);
4839 4840
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4841
		return use_sg;
4842
	}
4843 4844 4845

	if (use_sg) {
		curr_sg = cp->sg;
4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857
		if (use_sg > h->ioaccel_maxsg) {
			addr64 = le64_to_cpu(
				h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
			curr_sg->address = cpu_to_le64(addr64);
			curr_sg->length = 0;
			curr_sg->reserved[0] = 0;
			curr_sg->reserved[1] = 0;
			curr_sg->reserved[2] = 0;
			curr_sg->chain_indicator = 0x80;

			curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
		}
4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872
		scsi_for_each_sg(cmd, sg, use_sg, i) {
			addr64 = (u64) sg_dma_address(sg);
			len  = sg_dma_len(sg);
			total_len += len;
			curr_sg->address = cpu_to_le64(addr64);
			curr_sg->length = cpu_to_le32(len);
			curr_sg->reserved[0] = 0;
			curr_sg->reserved[1] = 0;
			curr_sg->reserved[2] = 0;
			curr_sg->chain_indicator = 0;
			curr_sg++;
		}

		switch (cmd->sc_data_direction) {
		case DMA_TO_DEVICE:
4873 4874
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_OUT;
4875 4876
			break;
		case DMA_FROM_DEVICE:
4877 4878
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_IN;
4879 4880
			break;
		case DMA_NONE:
4881 4882
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_NO_DATA;
4883 4884 4885 4886 4887 4888 4889 4890
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
				cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
4891 4892
		cp->direction &= ~IOACCEL2_DIRECTION_MASK;
		cp->direction |= IOACCEL2_DIR_NO_DATA;
4893
	}
4894 4895 4896 4897

	/* Set encryption parameters, if necessary */
	set_encrypt_ioaccel2(h, c, cp);

D
Don Brace 已提交
4898
	cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4899
	cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4900 4901 4902 4903 4904
	memcpy(cp->cdb, cdb, sizeof(cp->cdb));

	cp->data_len = cpu_to_le32(total_len);
	cp->err_ptr = cpu_to_le64(c->busaddr +
			offsetof(struct io_accel2_cmd, error_data));
4905
	cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4906

4907 4908 4909
	/* fill in sg elements */
	if (use_sg > h->ioaccel_maxsg) {
		cp->sg_count = 1;
D
Don Brace 已提交
4910
		cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
4911 4912 4913 4914 4915 4916 4917 4918
		if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
			atomic_dec(&phys_disk->ioaccel_cmds_out);
			scsi_dma_unmap(cmd);
			return -1;
		}
	} else
		cp->sg_count = (u8) use_sg;

4919 4920 4921 4922 4923 4924 4925 4926 4927
	enqueue_cmd_and_start_io(h, c);
	return 0;
}

/*
 * Queue a command to the correct I/O accelerator path.
 */
static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4928
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4929
{
4930 4931 4932 4933 4934 4935
	if (!c->scsi_cmd->device)
		return -1;

	if (!c->scsi_cmd->device->hostdata)
		return -1;

4936 4937 4938 4939 4940 4941
	/* Try to honor the device's queue depth */
	if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
					phys_disk->queue_depth) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
		return IO_ACCEL_INELIGIBLE;
	}
4942 4943
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
4944 4945
						cdb, cdb_len, scsi3addr,
						phys_disk);
4946 4947
	else
		return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
4948 4949
						cdb, cdb_len, scsi3addr,
						phys_disk);
4950 4951
}

4952 4953 4954 4955 4956
static void raid_map_helper(struct raid_map_data *map,
		int offload_to_mirror, u32 *map_index, u32 *current_group)
{
	if (offload_to_mirror == 0)  {
		/* use physical disk in the first mirrored group. */
D
Don Brace 已提交
4957
		*map_index %= le16_to_cpu(map->data_disks_per_row);
4958 4959 4960 4961
		return;
	}
	do {
		/* determine mirror group that *map_index indicates */
D
Don Brace 已提交
4962 4963
		*current_group = *map_index /
			le16_to_cpu(map->data_disks_per_row);
4964 4965
		if (offload_to_mirror == *current_group)
			continue;
D
Don Brace 已提交
4966
		if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
4967
			/* select map index from next group */
D
Don Brace 已提交
4968
			*map_index += le16_to_cpu(map->data_disks_per_row);
4969 4970 4971
			(*current_group)++;
		} else {
			/* select map index from first group */
D
Don Brace 已提交
4972
			*map_index %= le16_to_cpu(map->data_disks_per_row);
4973 4974 4975 4976 4977
			*current_group = 0;
		}
	} while (offload_to_mirror != *current_group);
}

4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995
/*
 * Attempt to perform offload RAID mapping for a logical volume I/O.
 */
static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
	struct CommandList *c)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	struct raid_map_data *map = &dev->raid_map;
	struct raid_map_disk_data *dd = &map->data[0];
	int is_write = 0;
	u32 map_index;
	u64 first_block, last_block;
	u32 block_cnt;
	u32 blocks_per_row;
	u64 first_row, last_row;
	u32 first_row_offset, last_row_offset;
	u32 first_column, last_column;
4996 4997 4998 4999 5000 5001 5002 5003
	u64 r0_first_row, r0_last_row;
	u32 r5or6_blocks_per_row;
	u64 r5or6_first_row, r5or6_last_row;
	u32 r5or6_first_row_offset, r5or6_last_row_offset;
	u32 r5or6_first_column, r5or6_last_column;
	u32 total_disks_per_row;
	u32 stripesize;
	u32 first_group, last_group, current_group;
5004 5005 5006 5007 5008 5009
	u32 map_row;
	u32 disk_handle;
	u64 disk_block;
	u32 disk_block_cnt;
	u8 cdb[16];
	u8 cdb_len;
D
Don Brace 已提交
5010
	u16 strip_size;
5011 5012 5013
#if BITS_PER_LONG == 32
	u64 tmpdiv;
#endif
5014
	int offload_to_mirror;
5015

5016 5017 5018
	if (!dev)
		return -1;

5019 5020 5021 5022 5023
	/* check for valid opcode, get LBA and block count */
	switch (cmd->cmnd[0]) {
	case WRITE_6:
		is_write = 1;
	case READ_6:
5024 5025 5026
		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
				(cmd->cmnd[2] << 8) |
				cmd->cmnd[3]);
5027
		block_cnt = cmd->cmnd[4];
5028 5029
		if (block_cnt == 0)
			block_cnt = 256;
5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084
		break;
	case WRITE_10:
		is_write = 1;
	case READ_10:
		first_block =
			(((u64) cmd->cmnd[2]) << 24) |
			(((u64) cmd->cmnd[3]) << 16) |
			(((u64) cmd->cmnd[4]) << 8) |
			cmd->cmnd[5];
		block_cnt =
			(((u32) cmd->cmnd[7]) << 8) |
			cmd->cmnd[8];
		break;
	case WRITE_12:
		is_write = 1;
	case READ_12:
		first_block =
			(((u64) cmd->cmnd[2]) << 24) |
			(((u64) cmd->cmnd[3]) << 16) |
			(((u64) cmd->cmnd[4]) << 8) |
			cmd->cmnd[5];
		block_cnt =
			(((u32) cmd->cmnd[6]) << 24) |
			(((u32) cmd->cmnd[7]) << 16) |
			(((u32) cmd->cmnd[8]) << 8) |
		cmd->cmnd[9];
		break;
	case WRITE_16:
		is_write = 1;
	case READ_16:
		first_block =
			(((u64) cmd->cmnd[2]) << 56) |
			(((u64) cmd->cmnd[3]) << 48) |
			(((u64) cmd->cmnd[4]) << 40) |
			(((u64) cmd->cmnd[5]) << 32) |
			(((u64) cmd->cmnd[6]) << 24) |
			(((u64) cmd->cmnd[7]) << 16) |
			(((u64) cmd->cmnd[8]) << 8) |
			cmd->cmnd[9];
		block_cnt =
			(((u32) cmd->cmnd[10]) << 24) |
			(((u32) cmd->cmnd[11]) << 16) |
			(((u32) cmd->cmnd[12]) << 8) |
			cmd->cmnd[13];
		break;
	default:
		return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
	}
	last_block = first_block + block_cnt - 1;

	/* check for write to non-RAID-0 */
	if (is_write && dev->raid_level != 0)
		return IO_ACCEL_INELIGIBLE;

	/* check for invalid block or wraparound */
D
Don Brace 已提交
5085 5086
	if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
		last_block < first_block)
5087 5088 5089
		return IO_ACCEL_INELIGIBLE;

	/* calculate stripe information for the request */
D
Don Brace 已提交
5090 5091 5092
	blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
				le16_to_cpu(map->strip_size);
	strip_size = le16_to_cpu(map->strip_size);
5093 5094 5095 5096 5097 5098 5099 5100 5101 5102
#if BITS_PER_LONG == 32
	tmpdiv = first_block;
	(void) do_div(tmpdiv, blocks_per_row);
	first_row = tmpdiv;
	tmpdiv = last_block;
	(void) do_div(tmpdiv, blocks_per_row);
	last_row = tmpdiv;
	first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
	last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
	tmpdiv = first_row_offset;
D
Don Brace 已提交
5103
	(void) do_div(tmpdiv, strip_size);
5104 5105
	first_column = tmpdiv;
	tmpdiv = last_row_offset;
D
Don Brace 已提交
5106
	(void) do_div(tmpdiv, strip_size);
5107 5108 5109 5110 5111 5112
	last_column = tmpdiv;
#else
	first_row = first_block / blocks_per_row;
	last_row = last_block / blocks_per_row;
	first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
	last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
D
Don Brace 已提交
5113 5114
	first_column = first_row_offset / strip_size;
	last_column = last_row_offset / strip_size;
5115 5116 5117 5118 5119 5120 5121
#endif

	/* if this isn't a single row/column then give to the controller */
	if ((first_row != last_row) || (first_column != last_column))
		return IO_ACCEL_INELIGIBLE;

	/* proceeding with driver mapping */
D
Don Brace 已提交
5122 5123
	total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
5124
	map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
Don Brace 已提交
5125
				le16_to_cpu(map->row_cnt);
5126 5127 5128 5129 5130 5131 5132 5133 5134
	map_index = (map_row * total_disks_per_row) + first_column;

	switch (dev->raid_level) {
	case HPSA_RAID_0:
		break; /* nothing special to do */
	case HPSA_RAID_1:
		/* Handles load balance across RAID 1 members.
		 * (2-drive R1 and R10 with even # of drives.)
		 * Appropriate for SSDs, not optimal for HDDs
5135
		 */
D
Don Brace 已提交
5136
		BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
5137
		if (dev->offload_to_mirror)
D
Don Brace 已提交
5138
			map_index += le16_to_cpu(map->data_disks_per_row);
5139
		dev->offload_to_mirror = !dev->offload_to_mirror;
5140 5141 5142 5143 5144
		break;
	case HPSA_RAID_ADM:
		/* Handles N-way mirrors  (R1-ADM)
		 * and R10 with # of drives divisible by 3.)
		 */
D
Don Brace 已提交
5145
		BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
5146 5147 5148 5149 5150 5151

		offload_to_mirror = dev->offload_to_mirror;
		raid_map_helper(map, offload_to_mirror,
				&map_index, &current_group);
		/* set mirror group to use next time */
		offload_to_mirror =
D
Don Brace 已提交
5152 5153
			(offload_to_mirror >=
			le16_to_cpu(map->layout_map_count) - 1)
5154 5155 5156 5157 5158 5159 5160 5161 5162
			? 0 : offload_to_mirror + 1;
		dev->offload_to_mirror = offload_to_mirror;
		/* Avoid direct use of dev->offload_to_mirror within this
		 * function since multiple threads might simultaneously
		 * increment it beyond the range of dev->layout_map_count -1.
		 */
		break;
	case HPSA_RAID_5:
	case HPSA_RAID_6:
D
Don Brace 已提交
5163
		if (le16_to_cpu(map->layout_map_count) <= 1)
5164 5165 5166 5167
			break;

		/* Verify first and last block are in same RAID group */
		r5or6_blocks_per_row =
D
Don Brace 已提交
5168 5169
			le16_to_cpu(map->strip_size) *
			le16_to_cpu(map->data_disks_per_row);
5170
		BUG_ON(r5or6_blocks_per_row == 0);
D
Don Brace 已提交
5171 5172
		stripesize = r5or6_blocks_per_row *
			le16_to_cpu(map->layout_map_count);
5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		first_group = do_div(tmpdiv, stripesize);
		tmpdiv = first_group;
		(void) do_div(tmpdiv, r5or6_blocks_per_row);
		first_group = tmpdiv;
		tmpdiv = last_block;
		last_group = do_div(tmpdiv, stripesize);
		tmpdiv = last_group;
		(void) do_div(tmpdiv, r5or6_blocks_per_row);
		last_group = tmpdiv;
#else
		first_group = (first_block % stripesize) / r5or6_blocks_per_row;
		last_group = (last_block % stripesize) / r5or6_blocks_per_row;
#endif
5188
		if (first_group != last_group)
5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234
			return IO_ACCEL_INELIGIBLE;

		/* Verify request is in a single row of RAID 5/6 */
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		(void) do_div(tmpdiv, stripesize);
		first_row = r5or6_first_row = r0_first_row = tmpdiv;
		tmpdiv = last_block;
		(void) do_div(tmpdiv, stripesize);
		r5or6_last_row = r0_last_row = tmpdiv;
#else
		first_row = r5or6_first_row = r0_first_row =
						first_block / stripesize;
		r5or6_last_row = r0_last_row = last_block / stripesize;
#endif
		if (r5or6_first_row != r5or6_last_row)
			return IO_ACCEL_INELIGIBLE;


		/* Verify request is in a single column */
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		first_row_offset = do_div(tmpdiv, stripesize);
		tmpdiv = first_row_offset;
		first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
		r5or6_first_row_offset = first_row_offset;
		tmpdiv = last_block;
		r5or6_last_row_offset = do_div(tmpdiv, stripesize);
		tmpdiv = r5or6_last_row_offset;
		r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
		tmpdiv = r5or6_first_row_offset;
		(void) do_div(tmpdiv, map->strip_size);
		first_column = r5or6_first_column = tmpdiv;
		tmpdiv = r5or6_last_row_offset;
		(void) do_div(tmpdiv, map->strip_size);
		r5or6_last_column = tmpdiv;
#else
		first_row_offset = r5or6_first_row_offset =
			(u32)((first_block % stripesize) %
						r5or6_blocks_per_row);

		r5or6_last_row_offset =
			(u32)((last_block % stripesize) %
						r5or6_blocks_per_row);

		first_column = r5or6_first_column =
D
Don Brace 已提交
5235
			r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5236
		r5or6_last_column =
D
Don Brace 已提交
5237
			r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5238 5239 5240 5241 5242 5243
#endif
		if (r5or6_first_column != r5or6_last_column)
			return IO_ACCEL_INELIGIBLE;

		/* Request is eligible */
		map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
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5244
			le16_to_cpu(map->row_cnt);
5245 5246

		map_index = (first_group *
D
Don Brace 已提交
5247
			(le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5248 5249 5250 5251
			(map_row * total_disks_per_row) + first_column;
		break;
	default:
		return IO_ACCEL_INELIGIBLE;
5252
	}
5253

5254 5255 5256
	if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
		return IO_ACCEL_INELIGIBLE;

5257
	c->phys_disk = dev->phys_disk[map_index];
5258 5259
	if (!c->phys_disk)
		return IO_ACCEL_INELIGIBLE;
5260

5261
	disk_handle = dd[map_index].ioaccel_handle;
D
Don Brace 已提交
5262 5263 5264 5265
	disk_block = le64_to_cpu(map->disk_starting_blk) +
			first_row * le16_to_cpu(map->strip_size) +
			(first_row_offset - first_column *
			le16_to_cpu(map->strip_size));
5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307
	disk_block_cnt = block_cnt;

	/* handle differing logical/physical block sizes */
	if (map->phys_blk_shift) {
		disk_block <<= map->phys_blk_shift;
		disk_block_cnt <<= map->phys_blk_shift;
	}
	BUG_ON(disk_block_cnt > 0xffff);

	/* build the new CDB for the physical disk I/O */
	if (disk_block > 0xffffffff) {
		cdb[0] = is_write ? WRITE_16 : READ_16;
		cdb[1] = 0;
		cdb[2] = (u8) (disk_block >> 56);
		cdb[3] = (u8) (disk_block >> 48);
		cdb[4] = (u8) (disk_block >> 40);
		cdb[5] = (u8) (disk_block >> 32);
		cdb[6] = (u8) (disk_block >> 24);
		cdb[7] = (u8) (disk_block >> 16);
		cdb[8] = (u8) (disk_block >> 8);
		cdb[9] = (u8) (disk_block);
		cdb[10] = (u8) (disk_block_cnt >> 24);
		cdb[11] = (u8) (disk_block_cnt >> 16);
		cdb[12] = (u8) (disk_block_cnt >> 8);
		cdb[13] = (u8) (disk_block_cnt);
		cdb[14] = 0;
		cdb[15] = 0;
		cdb_len = 16;
	} else {
		cdb[0] = is_write ? WRITE_10 : READ_10;
		cdb[1] = 0;
		cdb[2] = (u8) (disk_block >> 24);
		cdb[3] = (u8) (disk_block >> 16);
		cdb[4] = (u8) (disk_block >> 8);
		cdb[5] = (u8) (disk_block);
		cdb[6] = 0;
		cdb[7] = (u8) (disk_block_cnt >> 8);
		cdb[8] = (u8) (disk_block_cnt);
		cdb[9] = 0;
		cdb_len = 10;
	}
	return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
5308 5309
						dev->scsi3addr,
						dev->phys_disk[map_index]);
5310 5311
}

5312 5313 5314 5315 5316
/*
 * Submit commands down the "normal" RAID stack path
 * All callers to hpsa_ciss_submit must check lockup_detected
 * beforehand, before (opt.) and after calling cmd_alloc
 */
5317 5318 5319
static int hpsa_ciss_submit(struct ctlr_info *h,
	struct CommandList *c, struct scsi_cmnd *cmd,
	unsigned char scsi3addr[])
5320 5321 5322 5323 5324 5325
{
	cmd->host_scribble = (unsigned char *) c;
	c->cmd_type = CMD_SCSI;
	c->scsi_cmd = cmd;
	c->Header.ReplyQueue = 0;  /* unused in simple mode */
	memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
5326
	c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5327 5328 5329 5330 5331 5332 5333 5334 5335

	/* Fill in the request block... */

	c->Request.Timeout = 0;
	BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
	c->Request.CDBLen = cmd->cmd_len;
	memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
	switch (cmd->sc_data_direction) {
	case DMA_TO_DEVICE:
5336 5337
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5338 5339
		break;
	case DMA_FROM_DEVICE:
5340 5341
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5342 5343
		break;
	case DMA_NONE:
5344 5345
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5346 5347 5348 5349 5350 5351 5352
		break;
	case DMA_BIDIRECTIONAL:
		/* This can happen if a buggy application does a scsi passthru
		 * and sets both inlen and outlen to non-zero. ( see
		 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
		 */

5353 5354
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371
		/* This is technically wrong, and hpsa controllers should
		 * reject it with CMD_INVALID, which is the most correct
		 * response, but non-fibre backends appear to let it
		 * slide by, and give the same results as if this field
		 * were set correctly.  Either way is acceptable for
		 * our purposes here.
		 */

		break;

	default:
		dev_err(&h->pdev->dev, "unknown data direction: %d\n",
			cmd->sc_data_direction);
		BUG();
		break;
	}

5372
	if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5373
		hpsa_cmd_resolve_and_free(h, c);
5374 5375 5376 5377 5378 5379 5380
		return SCSI_MLQUEUE_HOST_BUSY;
	}
	enqueue_cmd_and_start_io(h, c);
	/* the cmd'll come back via intr handler in complete_scsi_command()  */
	return 0;
}

5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398
static void hpsa_cmd_init(struct ctlr_info *h, int index,
				struct CommandList *c)
{
	dma_addr_t cmd_dma_handle, err_dma_handle;

	/* Zero out all of commandlist except the last field, refcount */
	memset(c, 0, offsetof(struct CommandList, refcount));
	c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
	cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
	c->err_info = h->errinfo_pool + index;
	memset(c->err_info, 0, sizeof(*c->err_info));
	err_dma_handle = h->errinfo_pool_dhandle
	    + index * sizeof(*c->err_info);
	c->cmdindex = index;
	c->busaddr = (u32) cmd_dma_handle;
	c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
	c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
	c->h = h;
5399
	c->scsi_cmd = SCSI_CMD_IDLE;
5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418
}

static void hpsa_preinitialize_commands(struct ctlr_info *h)
{
	int i;

	for (i = 0; i < h->nr_cmds; i++) {
		struct CommandList *c = h->cmd_pool + i;

		hpsa_cmd_init(h, i, c);
		atomic_set(&c->refcount, 0);
	}
}

static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
				struct CommandList *c)
{
	dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);

5419 5420
	BUG_ON(c->cmdindex != index);

5421 5422 5423 5424 5425
	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
	memset(c->err_info, 0, sizeof(*c->err_info));
	c->busaddr = (u32) cmd_dma_handle;
}

5426 5427 5428 5429 5430 5431 5432
static int hpsa_ioaccel_submit(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd,
		unsigned char *scsi3addr)
{
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	int rc = IO_ACCEL_INELIGIBLE;

5433 5434 5435
	if (!dev)
		return SCSI_MLQUEUE_HOST_BUSY;

5436 5437 5438 5439 5440 5441 5442 5443 5444
	cmd->host_scribble = (unsigned char *) c;

	if (dev->offload_enabled) {
		hpsa_cmd_init(h, c->cmdindex, c);
		c->cmd_type = CMD_SCSI;
		c->scsi_cmd = cmd;
		rc = hpsa_scsi_ioaccel_raid_map(h, c);
		if (rc < 0)     /* scsi_dma_map failed. */
			rc = SCSI_MLQUEUE_HOST_BUSY;
5445
	} else if (dev->hba_ioaccel_enabled) {
5446 5447 5448 5449 5450 5451 5452 5453 5454 5455
		hpsa_cmd_init(h, c->cmdindex, c);
		c->cmd_type = CMD_SCSI;
		c->scsi_cmd = cmd;
		rc = hpsa_scsi_ioaccel_direct_map(h, c);
		if (rc < 0)     /* scsi_dma_map failed. */
			rc = SCSI_MLQUEUE_HOST_BUSY;
	}
	return rc;
}

5456 5457 5458 5459
static void hpsa_command_resubmit_worker(struct work_struct *work)
{
	struct scsi_cmnd *cmd;
	struct hpsa_scsi_dev_t *dev;
5460
	struct CommandList *c = container_of(work, struct CommandList, work);
5461 5462 5463 5464 5465

	cmd = c->scsi_cmd;
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
5466
		return hpsa_cmd_free_and_done(c->h, c, cmd);
5467
	}
W
Webb Scales 已提交
5468 5469
	if (c->reset_pending)
		return hpsa_cmd_resolve_and_free(c->h, c);
5470 5471
	if (c->abort_pending)
		return hpsa_cmd_abort_and_free(c->h, c, cmd);
5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488
	if (c->cmd_type == CMD_IOACCEL2) {
		struct ctlr_info *h = c->h;
		struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
		int rc;

		if (c2->error_data.serv_response ==
				IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
			rc = hpsa_ioaccel_submit(h, c, cmd, dev->scsi3addr);
			if (rc == 0)
				return;
			if (rc == SCSI_MLQUEUE_HOST_BUSY) {
				/*
				 * If we get here, it means dma mapping failed.
				 * Try again via scsi mid layer, which will
				 * then get SCSI_MLQUEUE_HOST_BUSY.
				 */
				cmd->result = DID_IMM_RETRY << 16;
5489
				return hpsa_cmd_free_and_done(h, c, cmd);
5490 5491 5492 5493
			}
			/* else, fall thru and resubmit down CISS path */
		}
	}
5494
	hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5495 5496 5497 5498 5499
	if (hpsa_ciss_submit(c->h, c, cmd, dev->scsi3addr)) {
		/*
		 * If we get here, it means dma mapping failed. Try
		 * again via scsi mid layer, which will then get
		 * SCSI_MLQUEUE_HOST_BUSY.
5500 5501 5502
		 *
		 * hpsa_ciss_submit will have already freed c
		 * if it encountered a dma mapping failure.
5503 5504 5505 5506 5507 5508
		 */
		cmd->result = DID_IMM_RETRY << 16;
		cmd->scsi_done(cmd);
	}
}

5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519
/* Running in struct Scsi_Host->host_lock less mode */
static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
{
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	unsigned char scsi3addr[8];
	struct CommandList *c;
	int rc = 0;

	/* Get the ptr to our adapter structure out of cmd->host. */
	h = sdev_to_hba(cmd->device);
5520 5521 5522

	BUG_ON(cmd->request->tag < 0);

5523 5524
	dev = cmd->device->hostdata;
	if (!dev) {
5525
		cmd->result = DID_NO_CONNECT << 16;
5526 5527 5528 5529 5530
		cmd->scsi_done(cmd);
		return 0;
	}

	if (dev->removed) {
5531 5532 5533 5534 5535
		cmd->result = DID_NO_CONNECT << 16;
		cmd->scsi_done(cmd);
		return 0;
	}

5536
	memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
5537

5538
	if (unlikely(lockup_detected(h))) {
5539
		cmd->result = DID_NO_CONNECT << 16;
5540 5541 5542
		cmd->scsi_done(cmd);
		return 0;
	}
5543
	c = cmd_tagged_alloc(h, cmd);
5544

5545 5546
	/*
	 * Call alternate submit routine for I/O accelerated commands.
5547 5548 5549 5550 5551
	 * Retries always go down the normal I/O path.
	 */
	if (likely(cmd->retries == 0 &&
		cmd->request->cmd_type == REQ_TYPE_FS &&
		h->acciopath_status)) {
5552 5553 5554 5555
		rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
		if (rc == 0)
			return 0;
		if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5556
			hpsa_cmd_resolve_and_free(h, c);
5557
			return SCSI_MLQUEUE_HOST_BUSY;
5558 5559 5560 5561 5562
		}
	}
	return hpsa_ciss_submit(h, c, cmd, scsi3addr);
}

5563
static void hpsa_scan_complete(struct ctlr_info *h)
5564 5565 5566
{
	unsigned long flags;

5567 5568 5569 5570
	spin_lock_irqsave(&h->scan_lock, flags);
	h->scan_finished = 1;
	wake_up_all(&h->scan_wait_queue);
	spin_unlock_irqrestore(&h->scan_lock, flags);
5571 5572
}

5573 5574 5575 5576 5577
static void hpsa_scan_start(struct Scsi_Host *sh)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;

5578 5579 5580 5581 5582 5583 5584 5585
	/*
	 * Don't let rescans be initiated on a controller known to be locked
	 * up.  If the controller locks up *during* a rescan, that thread is
	 * probably hosed, but at least we can prevent new rescan threads from
	 * piling up on a locked up controller.
	 */
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
5586

5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602
	/* wait until any scan already in progress is finished. */
	while (1) {
		spin_lock_irqsave(&h->scan_lock, flags);
		if (h->scan_finished)
			break;
		spin_unlock_irqrestore(&h->scan_lock, flags);
		wait_event(h->scan_wait_queue, h->scan_finished);
		/* Note: We don't need to worry about a race between this
		 * thread and driver unload because the midlayer will
		 * have incremented the reference count, so unload won't
		 * happen if we're in here.
		 */
	}
	h->scan_finished = 0; /* mark scan as in progress */
	spin_unlock_irqrestore(&h->scan_lock, flags);

5603 5604
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
5605

D
Don Brace 已提交
5606 5607 5608 5609 5610 5611 5612 5613
	/*
	 * Do the scan after a reset completion
	 */
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
		return;
	}

D
Don Brace 已提交
5614
	hpsa_update_scsi_devices(h);
5615

5616
	hpsa_scan_complete(h);
5617 5618
}

D
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5619 5620
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
5621 5622 5623 5624
	struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;

	if (!logical_drive)
		return -ENODEV;
D
Don Brace 已提交
5625 5626 5627

	if (qdepth < 1)
		qdepth = 1;
5628 5629 5630 5631
	else if (qdepth > logical_drive->queue_depth)
		qdepth = logical_drive->queue_depth;

	return scsi_change_queue_depth(sdev, qdepth);
D
Don Brace 已提交
5632 5633
}

5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;
	int finished;

	spin_lock_irqsave(&h->scan_lock, flags);
	finished = h->scan_finished;
	spin_unlock_irqrestore(&h->scan_lock, flags);
	return finished;
}

5647
static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5648
{
5649
	struct Scsi_Host *sh;
5650

5651
	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5652 5653 5654 5655
	if (sh == NULL) {
		dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
		return -ENOMEM;
	}
5656 5657 5658 5659 5660 5661 5662 5663

	sh->io_port = 0;
	sh->n_io_port = 0;
	sh->this_id = -1;
	sh->max_channel = 3;
	sh->max_cmd_len = MAX_COMMAND_SIZE;
	sh->max_lun = HPSA_MAX_LUN;
	sh->max_id = HPSA_MAX_LUN;
5664
	sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5665
	sh->cmd_per_lun = sh->can_queue;
5666
	sh->sg_tablesize = h->maxsgentries;
K
Kevin Barnett 已提交
5667
	sh->transportt = hpsa_sas_transport_template;
5668
	sh->hostdata[0] = (unsigned long) h;
5669
	sh->irq = pci_irq_vector(h->pdev, 0);
5670
	sh->unique_id = sh->irq;
5671

5672
	h->scsi_host = sh;
5673
	return 0;
5674
}
5675

5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686
static int hpsa_scsi_add_host(struct ctlr_info *h)
{
	int rv;

	rv = scsi_add_host(h->scsi_host, &h->pdev->dev);
	if (rv) {
		dev_err(&h->pdev->dev, "scsi_add_host failed\n");
		return rv;
	}
	scsi_scan_host(h->scsi_host);
	return 0;
5687 5688
}

5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705
/*
 * The block layer has already gone to the trouble of picking out a unique,
 * small-integer tag for this request.  We use an offset from that value as
 * an index to select our command block.  (The offset allows us to reserve the
 * low-numbered entries for our own uses.)
 */
static int hpsa_get_cmd_index(struct scsi_cmnd *scmd)
{
	int idx = scmd->request->tag;

	if (idx < 0)
		return idx;

	/* Offset to leave space for internal cmds. */
	return idx += HPSA_NRESERVED_CMDS;
}

5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718
/*
 * Send a TEST_UNIT_READY command to the specified LUN using the specified
 * reply queue; returns zero if the unit is ready, and non-zero otherwise.
 */
static int hpsa_send_test_unit_ready(struct ctlr_info *h,
				struct CommandList *c, unsigned char lunaddr[],
				int reply_queue)
{
	int rc;

	/* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
	(void) fill_cmd(c, TEST_UNIT_READY, h,
			NULL, 0, 0, lunaddr, TYPE_CMD);
5719
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5720 5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748
	if (rc)
		return rc;
	/* no unmap needed here because no data xfer. */

	/* Check if the unit is already ready. */
	if (c->err_info->CommandStatus == CMD_SUCCESS)
		return 0;

	/*
	 * The first command sent after reset will receive "unit attention" to
	 * indicate that the LUN has been reset...this is actually what we're
	 * looking for (but, success is good too).
	 */
	if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
		c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
			(c->err_info->SenseInfo[2] == NO_SENSE ||
			 c->err_info->SenseInfo[2] == UNIT_ATTENTION))
		return 0;

	return 1;
}

/*
 * Wait for a TEST_UNIT_READY command to complete, retrying as necessary;
 * returns zero when the unit is ready, and non-zero when giving up.
 */
static int hpsa_wait_for_test_unit_ready(struct ctlr_info *h,
				struct CommandList *c,
				unsigned char lunaddr[], int reply_queue)
5749
{
5750
	int rc;
5751 5752 5753 5754
	int count = 0;
	int waittime = 1; /* seconds */

	/* Send test unit ready until device ready, or give up. */
5755
	for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5756

5757 5758
		/*
		 * Wait for a bit.  do this first, because if we send
5759 5760 5761
		 * the TUR right away, the reset will just abort it.
		 */
		msleep(1000 * waittime);
5762 5763 5764 5765

		rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
		if (!rc)
			break;
5766 5767 5768

		/* Increase wait time with each try, up to a point. */
		if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5769
			waittime *= 2;
5770

5771 5772 5773 5774
		dev_warn(&h->pdev->dev,
			 "waiting %d secs for device to become ready.\n",
			 waittime);
	}
5775

5776 5777
	return rc;
}
5778

5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806
static int wait_for_device_to_become_ready(struct ctlr_info *h,
					   unsigned char lunaddr[],
					   int reply_queue)
{
	int first_queue;
	int last_queue;
	int rq;
	int rc = 0;
	struct CommandList *c;

	c = cmd_alloc(h);

	/*
	 * If no specific reply queue was requested, then send the TUR
	 * repeatedly, requesting a reply on each reply queue; otherwise execute
	 * the loop exactly once using only the specified queue.
	 */
	if (reply_queue == DEFAULT_REPLY_QUEUE) {
		first_queue = 0;
		last_queue = h->nreply_queues - 1;
	} else {
		first_queue = reply_queue;
		last_queue = reply_queue;
	}

	for (rq = first_queue; rq <= last_queue; rq++) {
		rc = hpsa_wait_for_test_unit_ready(h, c, lunaddr, rq);
		if (rc)
5807 5808 5809 5810 5811 5812 5813 5814
			break;
	}

	if (rc)
		dev_warn(&h->pdev->dev, "giving up on device.\n");
	else
		dev_warn(&h->pdev->dev, "device is ready.\n");

5815
	cmd_free(h, c);
5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826
	return rc;
}

/* Need at least one of these error handlers to keep ../scsi/hosts.c from
 * complaining.  Doing a host- or bus-reset can't do anything good here.
 */
static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
{
	int rc;
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
S
Scott Teel 已提交
5827
	u8 reset_type;
5828
	char msg[48];
5829 5830 5831 5832 5833

	/* find the controller to which the command to be aborted was sent */
	h = sdev_to_hba(scsicmd->device);
	if (h == NULL) /* paranoia */
		return FAILED;
5834 5835 5836 5837

	if (lockup_detected(h))
		return FAILED;

5838 5839
	dev = scsicmd->device->hostdata;
	if (!dev) {
W
Webb Scales 已提交
5840
		dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
5841 5842
		return FAILED;
	}
5843 5844 5845

	/* if controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
5846 5847 5848
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5849
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5850 5851 5852 5853 5854
		return FAILED;
	}

	/* this reset request might be the result of a lockup; check */
	if (detect_controller_lockup(h)) {
5855 5856 5857
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, new lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5858
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5859 5860 5861
		return FAILED;
	}

W
Webb Scales 已提交
5862 5863 5864 5865
	/* Do not attempt on controller */
	if (is_hba_lunid(dev->scsi3addr))
		return SUCCESS;

S
Scott Teel 已提交
5866 5867 5868 5869 5870 5871 5872 5873
	if (is_logical_dev_addr_mode(dev->scsi3addr))
		reset_type = HPSA_DEVICE_RESET_MSG;
	else
		reset_type = HPSA_PHYS_TARGET_RESET;

	sprintf(msg, "resetting %s",
		reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ");
	hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5874

D
Don Brace 已提交
5875
	h->reset_in_progress = 1;
5876

5877
	/* send a reset to the SCSI LUN which the command was sent to */
S
Scott Teel 已提交
5878
	rc = hpsa_do_reset(h, dev, dev->scsi3addr, reset_type,
W
Webb Scales 已提交
5879
			   DEFAULT_REPLY_QUEUE);
S
Scott Teel 已提交
5880 5881 5882
	sprintf(msg, "reset %s %s",
		reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
		rc == 0 ? "completed successfully" : "failed");
W
Webb Scales 已提交
5883
	hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
D
Don Brace 已提交
5884
	h->reset_in_progress = 0;
W
Webb Scales 已提交
5885
	return rc == 0 ? SUCCESS : FAILED;
5886 5887
}

5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902
static void swizzle_abort_tag(u8 *tag)
{
	u8 original_tag[8];

	memcpy(original_tag, tag, 8);
	tag[0] = original_tag[3];
	tag[1] = original_tag[2];
	tag[2] = original_tag[1];
	tag[3] = original_tag[0];
	tag[4] = original_tag[7];
	tag[5] = original_tag[6];
	tag[6] = original_tag[5];
	tag[7] = original_tag[4];
}

5903
static void hpsa_get_tag(struct ctlr_info *h,
D
Don Brace 已提交
5904
	struct CommandList *c, __le32 *taglower, __le32 *tagupper)
5905
{
D
Don Brace 已提交
5906
	u64 tag;
5907 5908 5909
	if (c->cmd_type == CMD_IOACCEL1) {
		struct io_accel1_cmd *cm1 = (struct io_accel1_cmd *)
			&h->ioaccel_cmd_pool[c->cmdindex];
D
Don Brace 已提交
5910 5911 5912
		tag = le64_to_cpu(cm1->tag);
		*tagupper = cpu_to_le32(tag >> 32);
		*taglower = cpu_to_le32(tag);
5913 5914 5915 5916 5917
		return;
	}
	if (c->cmd_type == CMD_IOACCEL2) {
		struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
			&h->ioaccel2_cmd_pool[c->cmdindex];
5918 5919 5920
		/* upper tag not used in ioaccel2 mode */
		memset(tagupper, 0, sizeof(*tagupper));
		*taglower = cm2->Tag;
5921
		return;
5922
	}
D
Don Brace 已提交
5923 5924 5925
	tag = le64_to_cpu(c->Header.tag);
	*tagupper = cpu_to_le32(tag >> 32);
	*taglower = cpu_to_le32(tag);
5926 5927
}

5928
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
S
Stephen Cameron 已提交
5929
	struct CommandList *abort, int reply_queue)
5930 5931 5932 5933
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;
D
Don Brace 已提交
5934
	__le32 tagupper, taglower;
5935

5936
	c = cmd_alloc(h);
5937

5938
	/* fill_cmd can't fail here, no buffer to map */
S
Stephen Cameron 已提交
5939
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
5940
		0, 0, scsi3addr, TYPE_MSG);
S
Stephen Cameron 已提交
5941
	if (h->needs_abort_tags_swizzled)
5942
		swizzle_abort_tag(&c->Request.CDB[4]);
5943
	(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5944
	hpsa_get_tag(h, abort, &taglower, &tagupper);
5945
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
5946
		__func__, tagupper, taglower);
5947 5948 5949 5950 5951 5952
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_SUCCESS:
		break;
5953 5954 5955
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
5956 5957 5958 5959 5960
	case CMD_UNABORTABLE: /* Very common, don't make noise. */
		rc = -1;
		break;
	default:
		dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
5961
			__func__, tagupper, taglower);
5962
		hpsa_scsi_interpret_error(h, c);
5963 5964 5965
		rc = -1;
		break;
	}
5966
	cmd_free(h, c);
5967 5968
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
		__func__, tagupper, taglower);
5969 5970 5971
	return rc;
}

5972 5973 5974 5975 5976 5977 5978
static void setup_ioaccel2_abort_cmd(struct CommandList *c, struct ctlr_info *h,
	struct CommandList *command_to_abort, int reply_queue)
{
	struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
	struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
	struct io_accel2_cmd *c2a =
		&h->ioaccel2_cmd_pool[command_to_abort->cmdindex];
5979
	struct scsi_cmnd *scmd = command_to_abort->scsi_cmd;
5980 5981
	struct hpsa_scsi_dev_t *dev = scmd->device->hostdata;

5982 5983 5984
	if (!dev)
		return;

5985 5986 5987 5988 5989 5990 5991 5992 5993 5994 5995 5996
	/*
	 * We're overlaying struct hpsa_tmf_struct on top of something which
	 * was allocated as a struct io_accel2_cmd, so we better be sure it
	 * actually fits, and doesn't overrun the error info space.
	 */
	BUILD_BUG_ON(sizeof(struct hpsa_tmf_struct) >
			sizeof(struct io_accel2_cmd));
	BUG_ON(offsetof(struct io_accel2_cmd, error_data) <
			offsetof(struct hpsa_tmf_struct, error_len) +
				sizeof(ac->error_len));

	c->cmd_type = IOACCEL2_TMF;
5997 5998
	c->scsi_cmd = SCSI_CMD_BUSY;

5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016
	/* Adjust the DMA address to point to the accelerated command buffer */
	c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
				(c->cmdindex * sizeof(struct io_accel2_cmd));
	BUG_ON(c->busaddr & 0x0000007F);

	memset(ac, 0, sizeof(*c2)); /* yes this is correct */
	ac->iu_type = IOACCEL2_IU_TMF_TYPE;
	ac->reply_queue = reply_queue;
	ac->tmf = IOACCEL2_TMF_ABORT;
	ac->it_nexus = cpu_to_le32(dev->ioaccel_handle);
	memset(ac->lun_id, 0, sizeof(ac->lun_id));
	ac->tag = cpu_to_le64(c->cmdindex << DIRECT_LOOKUP_SHIFT);
	ac->abort_tag = cpu_to_le64(le32_to_cpu(c2a->Tag));
	ac->error_ptr = cpu_to_le64(c->busaddr +
			offsetof(struct io_accel2_cmd, error_data));
	ac->error_len = cpu_to_le32(sizeof(c2->error_data));
}

6017 6018 6019 6020 6021 6022 6023 6024
/* ioaccel2 path firmware cannot handle abort task requests.
 * Change abort requests to physical target reset, and send to the
 * address of the physical disk used for the ioaccel 2 command.
 * Return 0 on success (IO_OK)
 *	 -1 on failure
 */

static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h,
6025
	unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
6026 6027 6028 6029 6030 6031 6032 6033
{
	int rc = IO_OK;
	struct scsi_cmnd *scmd; /* scsi command within request being aborted */
	struct hpsa_scsi_dev_t *dev; /* device to which scsi cmd was sent */
	unsigned char phys_scsi3addr[8]; /* addr of phys disk with volume */
	unsigned char *psa = &phys_scsi3addr[0];

	/* Get a pointer to the hpsa logical device. */
6034
	scmd = abort->scsi_cmd;
6035 6036 6037 6038 6039 6040 6041
	dev = (struct hpsa_scsi_dev_t *)(scmd->device->hostdata);
	if (dev == NULL) {
		dev_warn(&h->pdev->dev,
			"Cannot abort: no device pointer for command.\n");
			return -1; /* not abortable */
	}

6042 6043
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
6044
			"scsi %d:%d:%d:%d %s scsi3addr 0x%8phN\n",
6045
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
6046
			"Reset as abort", scsi3addr);
6047

6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060
	if (!dev->offload_enabled) {
		dev_warn(&h->pdev->dev,
			"Can't abort: device is not operating in HP SSD Smart Path mode.\n");
		return -1; /* not abortable */
	}

	/* Incoming scsi3addr is logical addr. We need physical disk addr. */
	if (!hpsa_get_pdisk_of_ioaccel2(h, abort, psa)) {
		dev_warn(&h->pdev->dev, "Can't abort: Failed lookup of physical address.\n");
		return -1; /* not abortable */
	}

	/* send the reset */
6061 6062
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
6063 6064
			"Reset as abort: Resetting physical device at scsi3addr 0x%8phN\n",
			psa);
6065
	rc = hpsa_do_reset(h, dev, psa, HPSA_PHYS_TARGET_RESET, reply_queue);
6066 6067
	if (rc != 0) {
		dev_warn(&h->pdev->dev,
6068 6069
			"Reset as abort: Failed on physical device at scsi3addr 0x%8phN\n",
			psa);
6070 6071 6072 6073
		return rc; /* failed to reset */
	}

	/* wait for device to recover */
6074
	if (wait_for_device_to_become_ready(h, psa, reply_queue) != 0) {
6075
		dev_warn(&h->pdev->dev,
6076 6077
			"Reset as abort: Failed: Device never recovered from reset: 0x%8phN\n",
			psa);
6078 6079 6080 6081 6082
		return -1;  /* failed to recover */
	}

	/* device recovered */
	dev_info(&h->pdev->dev,
6083 6084
		"Reset as abort: Device recovered from reset: scsi3addr 0x%8phN\n",
		psa);
6085 6086 6087 6088

	return rc; /* success */
}

6089 6090 6091 6092 6093 6094 6095 6096 6097 6098
static int hpsa_send_abort_ioaccel2(struct ctlr_info *h,
	struct CommandList *abort, int reply_queue)
{
	int rc = IO_OK;
	struct CommandList *c;
	__le32 taglower, tagupper;
	struct hpsa_scsi_dev_t *dev;
	struct io_accel2_cmd *c2;

	dev = abort->scsi_cmd->device->hostdata;
6099 6100 6101
	if (!dev)
		return -1;

6102 6103 6104 6105 6106 6107
	if (!dev->offload_enabled && !dev->hba_ioaccel_enabled)
		return -1;

	c = cmd_alloc(h);
	setup_ioaccel2_abort_cmd(c, h, abort, reply_queue);
	c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
6108
	(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140
	hpsa_get_tag(h, abort, &taglower, &tagupper);
	dev_dbg(&h->pdev->dev,
		"%s: Tag:0x%08x:%08x: do_simple_cmd(ioaccel2 abort) completed.\n",
		__func__, tagupper, taglower);
	/* no unmap needed here because no data xfer. */

	dev_dbg(&h->pdev->dev,
		"%s: Tag:0x%08x:%08x: abort service response = 0x%02x.\n",
		__func__, tagupper, taglower, c2->error_data.serv_response);
	switch (c2->error_data.serv_response) {
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		rc = 0;
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
	case IOACCEL2_SERV_RESPONSE_FAILURE:
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		rc = -1;
		break;
	default:
		dev_warn(&h->pdev->dev,
			"%s: Tag:0x%08x:%08x: unknown abort service response 0x%02x\n",
			__func__, tagupper, taglower,
			c2->error_data.serv_response);
		rc = -1;
	}
	cmd_free(h, c);
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
		tagupper, taglower);
	return rc;
}

6141
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
6142
	struct hpsa_scsi_dev_t *dev, struct CommandList *abort, int reply_queue)
6143
{
6144 6145
	/*
	 * ioccelerator mode 2 commands should be aborted via the
6146
	 * accelerated path, since RAID path is unaware of these commands,
6147 6148
	 * but not all underlying firmware can handle abort TMF.
	 * Change abort to physical device reset when abort TMF is unsupported.
6149
	 */
6150
	if (abort->cmd_type == CMD_IOACCEL2) {
6151 6152
		if ((HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags) ||
			dev->physical_device)
6153 6154 6155
			return hpsa_send_abort_ioaccel2(h, abort,
						reply_queue);
		else
6156 6157
			return hpsa_send_reset_as_abort_ioaccel2(h,
							dev->scsi3addr,
6158
							abort, reply_queue);
6159
	}
6160
	return hpsa_send_abort(h, dev->scsi3addr, abort, reply_queue);
6161
}
6162

6163 6164 6165 6166 6167 6168 6169
/* Find out which reply queue a command was meant to return on */
static int hpsa_extract_reply_queue(struct ctlr_info *h,
					struct CommandList *c)
{
	if (c->cmd_type == CMD_IOACCEL2)
		return h->ioaccel2_cmd_pool[c->cmdindex].reply_queue;
	return c->Header.ReplyQueue;
6170 6171
}

S
Stephen Cameron 已提交
6172 6173 6174 6175 6176 6177 6178 6179 6180 6181 6182 6183
/*
 * Limit concurrency of abort commands to prevent
 * over-subscription of commands
 */
static inline int wait_for_available_abort_cmd(struct ctlr_info *h)
{
#define ABORT_CMD_WAIT_MSECS 5000
	return !wait_event_timeout(h->abort_cmd_wait_queue,
			atomic_dec_if_positive(&h->abort_cmds_available) >= 0,
			msecs_to_jiffies(ABORT_CMD_WAIT_MSECS));
}

6184 6185 6186 6187 6188 6189 6190
/* Send an abort for the specified command.
 *	If the device and controller support it,
 *		send a task abort request.
 */
static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
{

6191
	int rc;
6192 6193 6194 6195 6196 6197
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	struct CommandList *abort; /* pointer to command to be aborted */
	struct scsi_cmnd *as;	/* ptr to scsi cmd inside aborted command. */
	char msg[256];		/* For debug messaging. */
	int ml = 0;
D
Don Brace 已提交
6198
	__le32 tagupper, taglower;
6199 6200 6201 6202
	int refcount, reply_queue;

	if (sc == NULL)
		return FAILED;
6203

S
Stephen Cameron 已提交
6204 6205 6206
	if (sc->device == NULL)
		return FAILED;

6207 6208
	/* Find the controller of the command to be aborted */
	h = sdev_to_hba(sc->device);
S
Stephen Cameron 已提交
6209
	if (h == NULL)
6210 6211
		return FAILED;

6212 6213 6214 6215 6216
	/* Find the device of the command to be aborted */
	dev = sc->device->hostdata;
	if (!dev) {
		dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
				msg);
6217
		return FAILED;
6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232
	}

	/* If controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
					"ABORT FAILED, lockup detected");
		return FAILED;
	}

	/* This is a good time to check if controller lockup has occurred */
	if (detect_controller_lockup(h)) {
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
					"ABORT FAILED, new lockup detected");
		return FAILED;
	}
6233

6234 6235 6236 6237 6238 6239
	/* Check that controller supports some kind of task abort */
	if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
		!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
		return FAILED;

	memset(msg, 0, sizeof(msg));
6240
	ml += sprintf(msg+ml, "scsi %d:%d:%d:%llu %s %p",
6241
		h->scsi_host->host_no, sc->device->channel,
6242
		sc->device->id, sc->device->lun,
6243
		"Aborting command", sc);
6244 6245 6246 6247

	/* Get SCSI command to be aborted */
	abort = (struct CommandList *) sc->host_scribble;
	if (abort == NULL) {
6248 6249 6250 6251 6252 6253 6254
		/* This can happen if the command already completed. */
		return SUCCESS;
	}
	refcount = atomic_inc_return(&abort->refcount);
	if (refcount == 1) { /* Command is done already. */
		cmd_free(h, abort);
		return SUCCESS;
6255
	}
S
Stephen Cameron 已提交
6256 6257 6258 6259 6260 6261 6262 6263

	/* Don't bother trying the abort if we know it won't work. */
	if (abort->cmd_type != CMD_IOACCEL2 &&
		abort->cmd_type != CMD_IOACCEL1 && !dev->supports_aborts) {
		cmd_free(h, abort);
		return FAILED;
	}

6264 6265 6266 6267 6268 6269 6270 6271 6272 6273
	/*
	 * Check that we're aborting the right command.
	 * It's possible the CommandList already completed and got re-used.
	 */
	if (abort->scsi_cmd != sc) {
		cmd_free(h, abort);
		return SUCCESS;
	}

	abort->abort_pending = true;
6274
	hpsa_get_tag(h, abort, &taglower, &tagupper);
6275
	reply_queue = hpsa_extract_reply_queue(h, abort);
6276
	ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
6277
	as  = abort->scsi_cmd;
6278
	if (as != NULL)
6279 6280 6281 6282 6283
		ml += sprintf(msg+ml,
			"CDBLen: %d CDB: 0x%02x%02x... SN: 0x%lx ",
			as->cmd_len, as->cmnd[0], as->cmnd[1],
			as->serial_number);
	dev_warn(&h->pdev->dev, "%s BEING SENT\n", msg);
6284
	hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
6285

6286 6287 6288 6289 6290
	/*
	 * Command is in flight, or possibly already completed
	 * by the firmware (but not to the scsi mid layer) but we can't
	 * distinguish which.  Send the abort down.
	 */
S
Stephen Cameron 已提交
6291 6292
	if (wait_for_available_abort_cmd(h)) {
		dev_warn(&h->pdev->dev,
6293 6294
			"%s FAILED, timeout waiting for an abort command to become available.\n",
			msg);
S
Stephen Cameron 已提交
6295 6296 6297
		cmd_free(h, abort);
		return FAILED;
	}
6298
	rc = hpsa_send_abort_both_ways(h, dev, abort, reply_queue);
S
Stephen Cameron 已提交
6299 6300
	atomic_inc(&h->abort_cmds_available);
	wake_up_all(&h->abort_cmd_wait_queue);
6301
	if (rc != 0) {
6302
		dev_warn(&h->pdev->dev, "%s SENT, FAILED\n", msg);
6303
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
6304
				"FAILED to abort command");
6305
		cmd_free(h, abort);
6306 6307
		return FAILED;
	}
6308
	dev_info(&h->pdev->dev, "%s SENT, SUCCESS\n", msg);
W
Webb Scales 已提交
6309
	wait_event(h->event_sync_wait_queue,
6310
		   abort->scsi_cmd != sc || lockup_detected(h));
6311
	cmd_free(h, abort);
6312
	return !lockup_detected(h) ? SUCCESS : FAILED;
6313 6314
}

6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366
/*
 * For operations with an associated SCSI command, a command block is allocated
 * at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
 * block request tag as an index into a table of entries.  cmd_tagged_free() is
 * the complement, although cmd_free() may be called instead.
 */
static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
					    struct scsi_cmnd *scmd)
{
	int idx = hpsa_get_cmd_index(scmd);
	struct CommandList *c = h->cmd_pool + idx;

	if (idx < HPSA_NRESERVED_CMDS || idx >= h->nr_cmds) {
		dev_err(&h->pdev->dev, "Bad block tag: %d not in [%d..%d]\n",
			idx, HPSA_NRESERVED_CMDS, h->nr_cmds - 1);
		/* The index value comes from the block layer, so if it's out of
		 * bounds, it's probably not our bug.
		 */
		BUG();
	}

	atomic_inc(&c->refcount);
	if (unlikely(!hpsa_is_cmd_idle(c))) {
		/*
		 * We expect that the SCSI layer will hand us a unique tag
		 * value.  Thus, there should never be a collision here between
		 * two requests...because if the selected command isn't idle
		 * then someone is going to be very disappointed.
		 */
		dev_err(&h->pdev->dev,
			"tag collision (tag=%d) in cmd_tagged_alloc().\n",
			idx);
		if (c->scsi_cmd != NULL)
			scsi_print_command(c->scsi_cmd);
		scsi_print_command(scmd);
	}

	hpsa_cmd_partial_init(h, idx, c);
	return c;
}

static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
{
	/*
	 * Release our reference to the block.  We don't need to do anything
	 * else to free it, because it is accessed by index.  (There's no point
	 * in checking the result of the decrement, since we cannot guarantee
	 * that there isn't a concurrent abort which is also accessing it.)
	 */
	(void)atomic_dec(&c->refcount);
}

6367 6368 6369 6370 6371
/*
 * For operations that cannot sleep, a command block is allocated at init,
 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
 * which ones are free or in use.  Lock must be held when calling this.
 * cmd_free() is the complement.
6372 6373
 * This function never gives up and returns NULL.  If it hangs,
 * another thread must call cmd_free() to free some tags.
6374
 */
6375

6376 6377 6378
static struct CommandList *cmd_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
6379
	int refcount, i;
6380
	int offset = 0;
6381

6382 6383
	/*
	 * There is some *extremely* small but non-zero chance that that
6384 6385 6386 6387 6388 6389 6390 6391
	 * multiple threads could get in here, and one thread could
	 * be scanning through the list of bits looking for a free
	 * one, but the free ones are always behind him, and other
	 * threads sneak in behind him and eat them before he can
	 * get to them, so that while there is always a free one, a
	 * very unlucky thread might be starved anyway, never able to
	 * beat the other threads.  In reality, this happens so
	 * infrequently as to be indistinguishable from never.
6392 6393 6394 6395 6396 6397 6398
	 *
	 * Note that we start allocating commands before the SCSI host structure
	 * is initialized.  Since the search starts at bit zero, this
	 * all works, since we have at least one command structure available;
	 * however, it means that the structures with the low indexes have to be
	 * reserved for driver-initiated requests, while requests from the block
	 * layer will use the higher indexes.
6399
	 */
6400

6401
	for (;;) {
6402 6403 6404 6405
		i = find_next_zero_bit(h->cmd_pool_bits,
					HPSA_NRESERVED_CMDS,
					offset);
		if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6406 6407 6408 6409 6410 6411 6412
			offset = 0;
			continue;
		}
		c = h->cmd_pool + i;
		refcount = atomic_inc_return(&c->refcount);
		if (unlikely(refcount > 1)) {
			cmd_free(h, c); /* already in use */
6413
			offset = (i + 1) % HPSA_NRESERVED_CMDS;
6414 6415 6416 6417 6418 6419
			continue;
		}
		set_bit(i & (BITS_PER_LONG - 1),
			h->cmd_pool_bits + (i / BITS_PER_LONG));
		break; /* it's ours now. */
	}
6420
	hpsa_cmd_partial_init(h, i, c);
6421 6422 6423
	return c;
}

6424 6425 6426 6427 6428 6429
/*
 * This is the complementary operation to cmd_alloc().  Note, however, in some
 * corner cases it may also be used to free blocks allocated by
 * cmd_tagged_alloc() in which case the ref-count decrement does the trick and
 * the clear-bit is harmless.
 */
6430 6431
static void cmd_free(struct ctlr_info *h, struct CommandList *c)
{
6432 6433
	if (atomic_dec_and_test(&c->refcount)) {
		int i;
6434

6435 6436 6437 6438
		i = c - h->cmd_pool;
		clear_bit(i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG));
	}
6439 6440 6441 6442
}

#ifdef CONFIG_COMPAT

D
Don Brace 已提交
6443 6444
static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
	void __user *arg)
6445 6446 6447 6448 6449 6450 6451 6452
{
	IOCTL32_Command_struct __user *arg32 =
	    (IOCTL32_Command_struct __user *) arg;
	IOCTL_Command_struct arg64;
	IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

6453
	memset(&arg64, 0, sizeof(arg64));
6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468
	err = 0;
	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |= copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |= copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

D
Don Brace 已提交
6469
	err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
6470 6471 6472 6473 6474 6475 6476 6477 6478 6479
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}

static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
D
Don Brace 已提交
6480
	int cmd, void __user *arg)
6481 6482 6483 6484 6485 6486 6487 6488 6489
{
	BIG_IOCTL32_Command_struct __user *arg32 =
	    (BIG_IOCTL32_Command_struct __user *) arg;
	BIG_IOCTL_Command_struct arg64;
	BIG_IOCTL_Command_struct __user *p =
	    compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

6490
	memset(&arg64, 0, sizeof(arg64));
6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506
	err = 0;
	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |= copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |= copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(arg64.malloc_size, &arg32->malloc_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

D
Don Brace 已提交
6507
	err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
6508 6509 6510 6511 6512 6513 6514 6515
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
6516

D
Don Brace 已提交
6517
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545
{
	switch (cmd) {
	case CCISS_GETPCIINFO:
	case CCISS_GETINTINFO:
	case CCISS_SETINTINFO:
	case CCISS_GETNODENAME:
	case CCISS_SETNODENAME:
	case CCISS_GETHEARTBEAT:
	case CCISS_GETBUSTYPES:
	case CCISS_GETFIRMVER:
	case CCISS_GETDRIVVER:
	case CCISS_REVALIDVOLS:
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
	case CCISS_RESCANDISK:
	case CCISS_GETLUNINFO:
		return hpsa_ioctl(dev, cmd, arg);

	case CCISS_PASSTHRU32:
		return hpsa_ioctl32_passthru(dev, cmd, arg);
	case CCISS_BIG_PASSTHRU32:
		return hpsa_ioctl32_big_passthru(dev, cmd, arg);

	default:
		return -ENOIOCTLCMD;
	}
}
6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590
#endif

static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
{
	struct hpsa_pci_info pciinfo;

	if (!argp)
		return -EINVAL;
	pciinfo.domain = pci_domain_nr(h->pdev->bus);
	pciinfo.bus = h->pdev->bus->number;
	pciinfo.dev_fn = h->pdev->devfn;
	pciinfo.board_id = h->board_id;
	if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
		return -EFAULT;
	return 0;
}

static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
{
	DriverVer_type DriverVer;
	unsigned char vmaj, vmin, vsubmin;
	int rc;

	rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
		&vmaj, &vmin, &vsubmin);
	if (rc != 3) {
		dev_info(&h->pdev->dev, "driver version string '%s' "
			"unrecognized.", HPSA_DRIVER_VERSION);
		vmaj = 0;
		vmin = 0;
		vsubmin = 0;
	}
	DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
	if (!argp)
		return -EINVAL;
	if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
		return -EFAULT;
	return 0;
}

static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
{
	IOCTL_Command_struct iocommand;
	struct CommandList *c;
	char *buff = NULL;
6591
	u64 temp64;
6592
	int rc = 0;
6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
		return -EFAULT;
	if ((iocommand.buf_size < 1) &&
	    (iocommand.Request.Type.Direction != XFER_NONE)) {
		return -EINVAL;
	}
	if (iocommand.buf_size > 0) {
		buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
		if (buff == NULL)
6607
			return -ENOMEM;
6608
		if (iocommand.Request.Type.Direction & XFER_WRITE) {
6609 6610 6611
			/* Copy the data into the buffer we created */
			if (copy_from_user(buff, iocommand.buf,
				iocommand.buf_size)) {
6612 6613
				rc = -EFAULT;
				goto out_kfree;
6614 6615 6616
			}
		} else {
			memset(buff, 0, iocommand.buf_size);
6617
		}
6618
	}
6619
	c = cmd_alloc(h);
6620

6621 6622
	/* Fill in the command type */
	c->cmd_type = CMD_IOCTL_PEND;
6623
	c->scsi_cmd = SCSI_CMD_BUSY;
6624 6625 6626 6627
	/* Fill in Command Header */
	c->Header.ReplyQueue = 0; /* unused in simple mode */
	if (iocommand.buf_size > 0) {	/* buffer to fill */
		c->Header.SGList = 1;
6628
		c->Header.SGTotal = cpu_to_le16(1);
6629 6630
	} else	{ /* no buffers to fill */
		c->Header.SGList = 0;
6631
		c->Header.SGTotal = cpu_to_le16(0);
6632 6633 6634 6635 6636 6637 6638 6639 6640
	}
	memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));

	/* Fill in Request block */
	memcpy(&c->Request, &iocommand.Request,
		sizeof(c->Request));

	/* Fill in the scatter gather information */
	if (iocommand.buf_size > 0) {
6641
		temp64 = pci_map_single(h->pdev, buff,
6642
			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
6643 6644 6645
		if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
			c->SG[0].Addr = cpu_to_le64(0);
			c->SG[0].Len = cpu_to_le32(0);
6646 6647 6648
			rc = -ENOMEM;
			goto out;
		}
6649 6650 6651
		c->SG[0].Addr = cpu_to_le64(temp64);
		c->SG[0].Len = cpu_to_le32(iocommand.buf_size);
		c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
6652
	}
6653
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6654
					NO_TIMEOUT);
6655 6656
	if (iocommand.buf_size > 0)
		hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
6657
	check_ioctl_unit_attention(h, c);
6658 6659 6660 6661
	if (rc) {
		rc = -EIO;
		goto out;
	}
6662 6663 6664 6665 6666

	/* Copy the error information out */
	memcpy(&iocommand.error_info, c->err_info,
		sizeof(iocommand.error_info));
	if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6667 6668
		rc = -EFAULT;
		goto out;
6669
	}
6670
	if ((iocommand.Request.Type.Direction & XFER_READ) &&
6671
		iocommand.buf_size > 0) {
6672 6673
		/* Copy the data out of the buffer we created */
		if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6674 6675
			rc = -EFAULT;
			goto out;
6676 6677
		}
	}
6678
out:
6679
	cmd_free(h, c);
6680 6681 6682
out_kfree:
	kfree(buff);
	return rc;
6683 6684 6685 6686 6687 6688 6689 6690
}

static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
{
	BIG_IOCTL_Command_struct *ioc;
	struct CommandList *c;
	unsigned char **buff = NULL;
	int *buff_size = NULL;
6691
	u64 temp64;
6692 6693
	BYTE sg_used = 0;
	int status = 0;
6694 6695
	u32 left;
	u32 sz;
6696 6697 6698 6699 6700 6701
	BYTE __user *data_ptr;

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
6702
	ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720
	if (!ioc) {
		status = -ENOMEM;
		goto cleanup1;
	}
	if (copy_from_user(ioc, argp, sizeof(*ioc))) {
		status = -EFAULT;
		goto cleanup1;
	}
	if ((ioc->buf_size < 1) &&
	    (ioc->Request.Type.Direction != XFER_NONE)) {
		status = -EINVAL;
		goto cleanup1;
	}
	/* Check kmalloc limits  using all SGs */
	if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
		status = -EINVAL;
		goto cleanup1;
	}
6721
	if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6722 6723 6724
		status = -EINVAL;
		goto cleanup1;
	}
6725
	buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
6726 6727 6728 6729
	if (!buff) {
		status = -ENOMEM;
		goto cleanup1;
	}
6730
	buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744
	if (!buff_size) {
		status = -ENOMEM;
		goto cleanup1;
	}
	left = ioc->buf_size;
	data_ptr = ioc->buf;
	while (left) {
		sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
		buff_size[sg_used] = sz;
		buff[sg_used] = kmalloc(sz, GFP_KERNEL);
		if (buff[sg_used] == NULL) {
			status = -ENOMEM;
			goto cleanup1;
		}
6745
		if (ioc->Request.Type.Direction & XFER_WRITE) {
6746
			if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6747
				status = -EFAULT;
6748 6749 6750 6751 6752 6753 6754 6755
				goto cleanup1;
			}
		} else
			memset(buff[sg_used], 0, sz);
		left -= sz;
		data_ptr += sz;
		sg_used++;
	}
6756
	c = cmd_alloc(h);
6757

6758
	c->cmd_type = CMD_IOCTL_PEND;
6759
	c->scsi_cmd = SCSI_CMD_BUSY;
6760
	c->Header.ReplyQueue = 0;
6761 6762
	c->Header.SGList = (u8) sg_used;
	c->Header.SGTotal = cpu_to_le16(sg_used);
6763 6764 6765 6766 6767
	memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
	memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
	if (ioc->buf_size > 0) {
		int i;
		for (i = 0; i < sg_used; i++) {
6768
			temp64 = pci_map_single(h->pdev, buff[i],
6769
				    buff_size[i], PCI_DMA_BIDIRECTIONAL);
6770 6771 6772 6773
			if (dma_mapping_error(&h->pdev->dev,
							(dma_addr_t) temp64)) {
				c->SG[i].Addr = cpu_to_le64(0);
				c->SG[i].Len = cpu_to_le32(0);
6774 6775 6776
				hpsa_pci_unmap(h->pdev, c, i,
					PCI_DMA_BIDIRECTIONAL);
				status = -ENOMEM;
6777
				goto cleanup0;
6778
			}
6779 6780 6781
			c->SG[i].Addr = cpu_to_le64(temp64);
			c->SG[i].Len = cpu_to_le32(buff_size[i]);
			c->SG[i].Ext = cpu_to_le32(0);
6782
		}
6783
		c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6784
	}
6785
	status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6786
						NO_TIMEOUT);
6787 6788
	if (sg_used)
		hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
6789
	check_ioctl_unit_attention(h, c);
6790 6791 6792 6793 6794
	if (status) {
		status = -EIO;
		goto cleanup0;
	}

6795 6796 6797 6798
	/* Copy the error information out */
	memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
	if (copy_to_user(argp, ioc, sizeof(*ioc))) {
		status = -EFAULT;
6799
		goto cleanup0;
6800
	}
6801
	if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
D
Don Brace 已提交
6802 6803
		int i;

6804 6805 6806 6807 6808
		/* Copy the data out of the buffer we created */
		BYTE __user *ptr = ioc->buf;
		for (i = 0; i < sg_used; i++) {
			if (copy_to_user(ptr, buff[i], buff_size[i])) {
				status = -EFAULT;
6809
				goto cleanup0;
6810 6811 6812 6813 6814
			}
			ptr += buff_size[i];
		}
	}
	status = 0;
6815
cleanup0:
6816
	cmd_free(h, c);
6817 6818
cleanup1:
	if (buff) {
D
Don Brace 已提交
6819 6820
		int i;

6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836
		for (i = 0; i < sg_used; i++)
			kfree(buff[i]);
		kfree(buff);
	}
	kfree(buff_size);
	kfree(ioc);
	return status;
}

static void check_ioctl_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
	if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
			c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
		(void) check_for_unit_attention(h, c);
}
6837

6838 6839 6840
/*
 * ioctl
 */
D
Don Brace 已提交
6841
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6842 6843 6844
{
	struct ctlr_info *h;
	void __user *argp = (void __user *)arg;
6845
	int rc;
6846 6847 6848 6849 6850 6851 6852

	h = sdev_to_hba(dev);

	switch (cmd) {
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
6853
		hpsa_scan_start(h->scsi_host);
6854 6855 6856 6857 6858 6859
		return 0;
	case CCISS_GETPCIINFO:
		return hpsa_getpciinfo_ioctl(h, argp);
	case CCISS_GETDRIVVER:
		return hpsa_getdrivver_ioctl(h, argp);
	case CCISS_PASSTHRU:
6860
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6861 6862
			return -EAGAIN;
		rc = hpsa_passthru_ioctl(h, argp);
6863
		atomic_inc(&h->passthru_cmds_avail);
6864
		return rc;
6865
	case CCISS_BIG_PASSTHRU:
6866
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6867 6868
			return -EAGAIN;
		rc = hpsa_big_passthru_ioctl(h, argp);
6869
		atomic_inc(&h->passthru_cmds_avail);
6870
		return rc;
6871 6872 6873 6874 6875
	default:
		return -ENOTTY;
	}
}

6876
static void hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
6877
				u8 reset_type)
6878 6879 6880 6881
{
	struct CommandList *c;

	c = cmd_alloc(h);
6882

6883 6884
	/* fill_cmd can't fail here, no data buffer to map */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6885 6886 6887 6888 6889 6890 6891 6892
		RAID_CTLR_LUNID, TYPE_MSG);
	c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
	c->waiting = NULL;
	enqueue_cmd_and_start_io(h, c);
	/* Don't wait for completion, the reset won't complete.  Don't free
	 * the command either.  This is the last command we will send before
	 * re-initializing everything, so it doesn't matter and won't leak.
	 */
6893
	return;
6894 6895
}

6896
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6897
	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6898 6899 6900
	int cmd_type)
{
	int pci_dir = XFER_NONE;
S
Stephen Cameron 已提交
6901
	u64 tag; /* for commands to be aborted */
6902 6903

	c->cmd_type = CMD_IOCTL_PEND;
6904
	c->scsi_cmd = SCSI_CMD_BUSY;
6905 6906 6907
	c->Header.ReplyQueue = 0;
	if (buff != NULL && size > 0) {
		c->Header.SGList = 1;
6908
		c->Header.SGTotal = cpu_to_le16(1);
6909 6910
	} else {
		c->Header.SGList = 0;
6911
		c->Header.SGTotal = cpu_to_le16(0);
6912 6913 6914 6915 6916 6917 6918
	}
	memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);

	if (cmd_type == TYPE_CMD) {
		switch (cmd) {
		case HPSA_INQUIRY:
			/* are we trying to read a vital product page */
6919
			if (page_code & VPD_PAGE) {
6920
				c->Request.CDB[1] = 0x01;
6921
				c->Request.CDB[2] = (page_code & 0xff);
6922 6923
			}
			c->Request.CDBLen = 6;
6924 6925
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6926 6927 6928 6929 6930 6931 6932 6933 6934 6935
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_INQUIRY;
			c->Request.CDB[4] = size & 0xFF;
			break;
		case HPSA_REPORT_LOG:
		case HPSA_REPORT_PHYS:
			/* Talking to controller so It's a physical command
			   mode = 00 target = 0.  Nothing to write.
			 */
			c->Request.CDBLen = 12;
6936 6937
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6938 6939 6940 6941 6942 6943 6944
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
S
Scott Teel 已提交
6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962
		case BMIC_SENSE_DIAG_OPTIONS:
			c->Request.CDBLen = 16;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			/* Spec says this should be BMIC_WRITE */
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
			break;
		case BMIC_SET_DIAG_OPTIONS:
			c->Request.CDBLen = 16;
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
			break;
6963 6964
		case HPSA_CACHE_FLUSH:
			c->Request.CDBLen = 12;
6965 6966 6967
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
6968 6969 6970
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6971 6972
			c->Request.CDB[7] = (size >> 8) & 0xFF;
			c->Request.CDB[8] = size & 0xFF;
6973 6974 6975
			break;
		case TEST_UNIT_READY:
			c->Request.CDBLen = 6;
6976 6977
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6978 6979
			c->Request.Timeout = 0;
			break;
6980 6981
		case HPSA_GET_RAID_MAP:
			c->Request.CDBLen = 12;
6982 6983
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6984 6985 6986 6987 6988 6989 6990 6991
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_CISS_READ;
			c->Request.CDB[1] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
6992 6993
		case BMIC_SENSE_CONTROLLER_PARAMETERS:
			c->Request.CDBLen = 10;
6994 6995
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6996 6997 6998 6999 7000 7001
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			break;
7002 7003 7004 7005 7006 7007 7008 7009 7010 7011
		case BMIC_IDENTIFY_PHYSICAL_DEVICE:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
K
Kevin Barnett 已提交
7012 7013 7014 7015 7016 7017 7018 7019 7020 7021
		case BMIC_SENSE_SUBSYSTEM_INFORMATION:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
7022 7023 7024 7025 7026 7027 7028 7029 7030 7031
		case BMIC_SENSE_STORAGE_BOX_PARAMS:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
S
Scott Teel 已提交
7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047
		case BMIC_IDENTIFY_CONTROLLER:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[1] = 0;
			c->Request.CDB[2] = 0;
			c->Request.CDB[3] = 0;
			c->Request.CDB[4] = 0;
			c->Request.CDB[5] = 0;
			c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			c->Request.CDB[9] = 0;
			break;
7048 7049 7050
		default:
			dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
			BUG();
7051
			return -1;
7052 7053 7054 7055
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {

S
Scott Teel 已提交
7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069
		case  HPSA_PHYS_TARGET_RESET:
			c->Request.CDBLen = 16;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
			c->Request.Timeout = 0; /* Don't time out */
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] = HPSA_RESET;
			c->Request.CDB[1] = HPSA_TARGET_RESET_TYPE;
			/* Physical target reset needs no control bytes 4-7*/
			c->Request.CDB[4] = 0x00;
			c->Request.CDB[5] = 0x00;
			c->Request.CDB[6] = 0x00;
			c->Request.CDB[7] = 0x00;
			break;
7070 7071
		case  HPSA_DEVICE_RESET_MSG:
			c->Request.CDBLen = 16;
7072 7073
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
7074
			c->Request.Timeout = 0; /* Don't time out */
7075 7076
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] =  cmd;
7077
			c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
7078 7079 7080 7081 7082 7083
			/* If bytes 4-7 are zero, it means reset the */
			/* LunID device */
			c->Request.CDB[4] = 0x00;
			c->Request.CDB[5] = 0x00;
			c->Request.CDB[6] = 0x00;
			c->Request.CDB[7] = 0x00;
7084 7085
			break;
		case  HPSA_ABORT_MSG:
S
Stephen Cameron 已提交
7086
			memcpy(&tag, buff, sizeof(tag));
D
Don Brace 已提交
7087
			dev_dbg(&h->pdev->dev,
S
Stephen Cameron 已提交
7088 7089
				"Abort Tag:0x%016llx using rqst Tag:0x%016llx",
				tag, c->Header.tag);
7090
			c->Request.CDBLen = 16;
7091 7092 7093
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
7094 7095 7096 7097 7098 7099
			c->Request.Timeout = 0; /* Don't time out */
			c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
			c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
			c->Request.CDB[2] = 0x00; /* reserved */
			c->Request.CDB[3] = 0x00; /* reserved */
			/* Tag to abort goes in CDB[4]-CDB[11] */
S
Stephen Cameron 已提交
7100
			memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
7101 7102 7103 7104
			c->Request.CDB[12] = 0x00; /* reserved */
			c->Request.CDB[13] = 0x00; /* reserved */
			c->Request.CDB[14] = 0x00; /* reserved */
			c->Request.CDB[15] = 0x00; /* reserved */
7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115
		break;
		default:
			dev_warn(&h->pdev->dev, "unknown message type %d\n",
				cmd);
			BUG();
		}
	} else {
		dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
		BUG();
	}

7116
	switch (GET_DIR(c->Request.type_attr_dir)) {
7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128
	case XFER_READ:
		pci_dir = PCI_DMA_FROMDEVICE;
		break;
	case XFER_WRITE:
		pci_dir = PCI_DMA_TODEVICE;
		break;
	case XFER_NONE:
		pci_dir = PCI_DMA_NONE;
		break;
	default:
		pci_dir = PCI_DMA_BIDIRECTIONAL;
	}
7129 7130 7131
	if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
		return -1;
	return 0;
7132 7133 7134 7135 7136 7137 7138 7139 7140
}

/*
 * Map (physical) PCI mem into (virtual) kernel space
 */
static void __iomem *remap_pci_mem(ulong base, ulong size)
{
	ulong page_base = ((ulong) base) & PAGE_MASK;
	ulong page_offs = ((ulong) base) - page_base;
7141 7142
	void __iomem *page_remapped = ioremap_nocache(page_base,
		page_offs + size);
7143 7144 7145 7146

	return page_remapped ? (page_remapped + page_offs) : NULL;
}

7147
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
7148
{
7149
	return h->access.command_completed(h, q);
7150 7151
}

7152
static inline bool interrupt_pending(struct ctlr_info *h)
7153 7154 7155 7156 7157 7158
{
	return h->access.intr_pending(h);
}

static inline long interrupt_not_for_us(struct ctlr_info *h)
{
7159 7160
	return (h->access.intr_pending(h) == 0) ||
		(h->interrupts_enabled == 0);
7161 7162
}

7163 7164
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
	u32 raw_tag)
7165 7166 7167 7168 7169 7170 7171 7172
{
	if (unlikely(tag_index >= h->nr_cmds)) {
		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
		return 1;
	}
	return 0;
}

7173
static inline void finish_cmd(struct CommandList *c)
7174
{
7175
	dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
7176 7177
	if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
			|| c->cmd_type == CMD_IOACCEL2))
7178
		complete_scsi_command(c);
7179
	else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
7180
		complete(c->waiting);
7181 7182
}

7183
/* process completion of an indexed ("direct lookup") command */
7184
static inline void process_indexed_cmd(struct ctlr_info *h,
7185 7186 7187 7188 7189
	u32 raw_tag)
{
	u32 tag_index;
	struct CommandList *c;

7190
	tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
7191 7192 7193 7194
	if (!bad_tag(h, tag_index, raw_tag)) {
		c = h->cmd_pool + tag_index;
		finish_cmd(c);
	}
7195 7196
}

7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215
/* Some controllers, like p400, will give us one interrupt
 * after a soft reset, even if we turned interrupts off.
 * Only need to check for this in the hpsa_xxx_discard_completions
 * functions.
 */
static int ignore_bogus_interrupt(struct ctlr_info *h)
{
	if (likely(!reset_devices))
		return 0;

	if (likely(h->interrupts_enabled))
		return 0;

	dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
		"(known firmware bug.)  Ignoring.\n");

	return 1;
}

7216 7217 7218 7219 7220 7221
/*
 * Convert &h->q[x] (passed to interrupt handlers) back to h.
 * Relies on (h-q[x] == x) being true for x such that
 * 0 <= x < MAX_REPLY_QUEUES.
 */
static struct ctlr_info *queue_to_hba(u8 *queue)
7222
{
7223 7224 7225 7226 7227 7228 7229
	return container_of((queue - *queue), struct ctlr_info, q[0]);
}

static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
{
	struct ctlr_info *h = queue_to_hba(queue);
	u8 q = *(u8 *) queue;
7230 7231 7232 7233 7234 7235 7236
	u32 raw_tag;

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
7237
	h->last_intr_timestamp = get_jiffies_64();
7238
	while (interrupt_pending(h)) {
7239
		raw_tag = get_next_completion(h, q);
7240
		while (raw_tag != FIFO_EMPTY)
7241
			raw_tag = next_command(h, q);
7242 7243 7244 7245
	}
	return IRQ_HANDLED;
}

7246
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
7247
{
7248
	struct ctlr_info *h = queue_to_hba(queue);
7249
	u32 raw_tag;
7250
	u8 q = *(u8 *) queue;
7251 7252 7253 7254

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

7255
	h->last_intr_timestamp = get_jiffies_64();
7256
	raw_tag = get_next_completion(h, q);
7257
	while (raw_tag != FIFO_EMPTY)
7258
		raw_tag = next_command(h, q);
7259 7260 7261
	return IRQ_HANDLED;
}

7262
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
7263
{
7264
	struct ctlr_info *h = queue_to_hba((u8 *) queue);
7265
	u32 raw_tag;
7266
	u8 q = *(u8 *) queue;
7267 7268 7269

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
7270
	h->last_intr_timestamp = get_jiffies_64();
7271
	while (interrupt_pending(h)) {
7272
		raw_tag = get_next_completion(h, q);
7273
		while (raw_tag != FIFO_EMPTY) {
7274
			process_indexed_cmd(h, raw_tag);
7275
			raw_tag = next_command(h, q);
7276 7277 7278 7279 7280
		}
	}
	return IRQ_HANDLED;
}

7281
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
7282
{
7283
	struct ctlr_info *h = queue_to_hba(queue);
7284
	u32 raw_tag;
7285
	u8 q = *(u8 *) queue;
7286

7287
	h->last_intr_timestamp = get_jiffies_64();
7288
	raw_tag = get_next_completion(h, q);
7289
	while (raw_tag != FIFO_EMPTY) {
7290
		process_indexed_cmd(h, raw_tag);
7291
		raw_tag = next_command(h, q);
7292 7293 7294 7295
	}
	return IRQ_HANDLED;
}

7296 7297 7298 7299
/* Send a message CDB to the firmware. Careful, this only works
 * in simple mode, not performant mode due to the tag lookup.
 * We only ever use this immediately after a controller reset.
 */
7300 7301
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
			unsigned char type)
7302 7303 7304 7305 7306 7307 7308 7309 7310 7311
{
	struct Command {
		struct CommandListHeader CommandHeader;
		struct RequestBlock Request;
		struct ErrDescriptor ErrorDescriptor;
	};
	struct Command *cmd;
	static const size_t cmd_sz = sizeof(*cmd) +
					sizeof(cmd->ErrorDescriptor);
	dma_addr_t paddr64;
D
Don Brace 已提交
7312 7313
	__le32 paddr32;
	u32 tag;
7314 7315 7316 7317 7318 7319 7320 7321 7322 7323 7324 7325 7326 7327
	void __iomem *vaddr;
	int i, err;

	vaddr = pci_ioremap_bar(pdev, 0);
	if (vaddr == NULL)
		return -ENOMEM;

	/* The Inbound Post Queue only accepts 32-bit physical addresses for the
	 * CCISS commands, so they must be allocated from the lower 4GiB of
	 * memory.
	 */
	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	if (err) {
		iounmap(vaddr);
7328
		return err;
7329 7330 7331 7332 7333 7334 7335 7336 7337 7338 7339 7340
	}

	cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
	if (cmd == NULL) {
		iounmap(vaddr);
		return -ENOMEM;
	}

	/* This must fit, because of the 32-bit consistent DMA mask.  Also,
	 * although there's no guarantee, we assume that the address is at
	 * least 4-byte aligned (most likely, it's page-aligned).
	 */
D
Don Brace 已提交
7341
	paddr32 = cpu_to_le32(paddr64);
7342 7343 7344

	cmd->CommandHeader.ReplyQueue = 0;
	cmd->CommandHeader.SGList = 0;
7345
	cmd->CommandHeader.SGTotal = cpu_to_le16(0);
D
Don Brace 已提交
7346
	cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7347 7348 7349
	memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);

	cmd->Request.CDBLen = 16;
7350 7351
	cmd->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7352 7353 7354 7355
	cmd->Request.Timeout = 0; /* Don't time out */
	cmd->Request.CDB[0] = opcode;
	cmd->Request.CDB[1] = type;
	memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
7356
	cmd->ErrorDescriptor.Addr =
D
Don Brace 已提交
7357
			cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7358
	cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7359

D
Don Brace 已提交
7360
	writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7361 7362 7363

	for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
		tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
D
Don Brace 已提交
7364
		if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394
			break;
		msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
	}

	iounmap(vaddr);

	/* we leak the DMA buffer here ... no choice since the controller could
	 *  still complete the command.
	 */
	if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
		dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
			opcode, type);
		return -ETIMEDOUT;
	}

	pci_free_consistent(pdev, cmd_sz, cmd, paddr64);

	if (tag & HPSA_ERROR_BIT) {
		dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
			opcode, type);
		return -EIO;
	}

	dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
		opcode, type);
	return 0;
}

#define hpsa_noop(p) hpsa_message(p, 3, 0)

7395
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
D
Don Brace 已提交
7396
	void __iomem *vaddr, u32 use_doorbell)
7397 7398 7399 7400 7401 7402 7403 7404
{

	if (use_doorbell) {
		/* For everything after the P600, the PCI power state method
		 * of resetting the controller doesn't work, so we have this
		 * other way using the doorbell register.
		 */
		dev_info(&pdev->dev, "using doorbell to reset controller\n");
7405
		writel(use_doorbell, vaddr + SA5_DOORBELL);
7406

7407
		/* PMC hardware guys tell us we need a 10 second delay after
7408 7409 7410 7411
		 * doorbell reset and before any attempt to talk to the board
		 * at all to ensure that this actually works and doesn't fall
		 * over in some weird corner cases.
		 */
7412
		msleep(10000);
7413 7414 7415 7416 7417 7418 7419 7420 7421
	} else { /* Try to do it the PCI power state way */

		/* Quoting from the Open CISS Specification: "The Power
		 * Management Control/Status Register (CSR) controls the power
		 * state of the device.  The normal operating state is D0,
		 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
		 * the controller, place the interface device in D3 then to D0,
		 * this causes a secondary PCI reset which will reset the
		 * controller." */
7422 7423 7424

		int rc = 0;

7425
		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7426

7427
		/* enter the D3hot power management state */
7428 7429 7430
		rc = pci_set_power_state(pdev, PCI_D3hot);
		if (rc)
			return rc;
7431 7432 7433 7434

		msleep(500);

		/* enter the D0 power management state */
7435 7436 7437
		rc = pci_set_power_state(pdev, PCI_D0);
		if (rc)
			return rc;
7438 7439 7440 7441 7442 7443 7444

		/*
		 * The P600 requires a small delay when changing states.
		 * Otherwise we may think the board did not reset and we bail.
		 * This for kdump only and is particular to the P600.
		 */
		msleep(500);
7445 7446 7447 7448
	}
	return 0;
}

7449
static void init_driver_version(char *driver_version, int len)
7450 7451
{
	memset(driver_version, 0, len);
7452
	strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7453 7454
}

7455
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470
{
	char *driver_version;
	int i, size = sizeof(cfgtable->driver_version);

	driver_version = kmalloc(size, GFP_KERNEL);
	if (!driver_version)
		return -ENOMEM;

	init_driver_version(driver_version, size);
	for (i = 0; i < size; i++)
		writeb(driver_version[i], &cfgtable->driver_version[i]);
	kfree(driver_version);
	return 0;
}

7471 7472
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
					  unsigned char *driver_ver)
7473 7474 7475 7476 7477 7478 7479
{
	int i;

	for (i = 0; i < sizeof(cfgtable->driver_version); i++)
		driver_ver[i] = readb(&cfgtable->driver_version[i]);
}

7480
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7481 7482 7483 7484 7485 7486 7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498 7499
{

	char *driver_ver, *old_driver_ver;
	int rc, size = sizeof(cfgtable->driver_version);

	old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
	if (!old_driver_ver)
		return -ENOMEM;
	driver_ver = old_driver_ver + size;

	/* After a reset, the 32 bytes of "driver version" in the cfgtable
	 * should have been changed, otherwise we know the reset failed.
	 */
	init_driver_version(old_driver_ver, size);
	read_driver_ver_from_cfgtable(cfgtable, driver_ver);
	rc = !memcmp(driver_ver, old_driver_ver, size);
	kfree(old_driver_ver);
	return rc;
}
7500
/* This does a hard reset of the controller using PCI power management
7501
 * states or the using the doorbell register.
7502
 */
7503
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7504
{
7505 7506 7507 7508 7509
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
	void __iomem *vaddr;
	unsigned long paddr;
7510
	u32 misc_fw_support;
7511
	int rc;
7512
	struct CfgTable __iomem *cfgtable;
7513
	u32 use_doorbell;
7514
	u16 command_register;
7515

7516 7517
	/* For controllers as old as the P600, this is very nearly
	 * the same thing as
7518 7519 7520 7521 7522 7523
	 *
	 * pci_save_state(pci_dev);
	 * pci_set_power_state(pci_dev, PCI_D3hot);
	 * pci_set_power_state(pci_dev, PCI_D0);
	 * pci_restore_state(pci_dev);
	 *
7524 7525 7526
	 * For controllers newer than the P600, the pci power state
	 * method of resetting doesn't work so we have another way
	 * using the doorbell register.
7527
	 */
7528

7529 7530
	if (!ctlr_is_resettable(board_id)) {
		dev_warn(&pdev->dev, "Controller not resettable\n");
7531 7532
		return -ENODEV;
	}
7533 7534 7535 7536

	/* if controller is soft- but not hard resettable... */
	if (!ctlr_is_hard_resettable(board_id))
		return -ENOTSUPP; /* try soft reset later. */
7537

7538 7539 7540
	/* Save the PCI command register */
	pci_read_config_word(pdev, 4, &command_register);
	pci_save_state(pdev);
7541

7542 7543 7544 7545 7546 7547 7548
	/* find the first memory BAR, so we can find the cfg table */
	rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
	if (rc)
		return rc;
	vaddr = remap_pci_mem(paddr, 0x250);
	if (!vaddr)
		return -ENOMEM;
7549

7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560
	/* find cfgtable in order to check if reset via doorbell is supported */
	rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
					&cfg_base_addr_index, &cfg_offset);
	if (rc)
		goto unmap_vaddr;
	cfgtable = remap_pci_mem(pci_resource_start(pdev,
		       cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
	if (!cfgtable) {
		rc = -ENOMEM;
		goto unmap_vaddr;
	}
7561 7562
	rc = write_driver_ver_to_cfgtable(cfgtable);
	if (rc)
7563
		goto unmap_cfgtable;
7564

7565 7566 7567
	/* If reset via doorbell register is supported, use that.
	 * There are two such methods.  Favor the newest method.
	 */
7568
	misc_fw_support = readl(&cfgtable->misc_fw_support);
7569 7570 7571 7572 7573 7574
	use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
	if (use_doorbell) {
		use_doorbell = DOORBELL_CTLR_RESET2;
	} else {
		use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
		if (use_doorbell) {
7575 7576
			dev_warn(&pdev->dev,
				"Soft reset not supported. Firmware update is required.\n");
7577
			rc = -ENOTSUPP; /* try soft reset */
7578 7579 7580
			goto unmap_cfgtable;
		}
	}
7581

7582 7583 7584
	rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
	if (rc)
		goto unmap_cfgtable;
7585

7586 7587
	pci_restore_state(pdev);
	pci_write_config_word(pdev, 4, command_register);
7588

7589 7590 7591 7592
	/* Some devices (notably the HP Smart Array 5i Controller)
	   need a little pause here */
	msleep(HPSA_POST_RESET_PAUSE_MSECS);

7593 7594 7595
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
	if (rc) {
		dev_warn(&pdev->dev,
7596
			"Failed waiting for board to become ready after hard reset\n");
7597 7598 7599
		goto unmap_cfgtable;
	}

7600 7601 7602 7603
	rc = controller_reset_failed(vaddr);
	if (rc < 0)
		goto unmap_cfgtable;
	if (rc) {
7604 7605 7606
		dev_warn(&pdev->dev, "Unable to successfully reset "
			"controller. Will try soft reset.\n");
		rc = -ENOTSUPP;
7607
	} else {
7608
		dev_info(&pdev->dev, "board ready after hard reset.\n");
7609 7610 7611 7612 7613 7614 7615 7616
	}

unmap_cfgtable:
	iounmap(cfgtable);

unmap_vaddr:
	iounmap(vaddr);
	return rc;
7617 7618 7619 7620 7621 7622 7623
}

/*
 *  We cannot read the structure directly, for portability we must use
 *   the io functions.
 *   This is for debug only.
 */
D
Don Brace 已提交
7624
static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7625
{
7626
#ifdef HPSA_DEBUG
7627 7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638 7639 7640 7641 7642 7643 7644 7645 7646
	int i;
	char temp_name[17];

	dev_info(dev, "Controller Configuration information\n");
	dev_info(dev, "------------------------------------\n");
	for (i = 0; i < 4; i++)
		temp_name[i] = readb(&(tb->Signature[i]));
	temp_name[4] = '\0';
	dev_info(dev, "   Signature = %s\n", temp_name);
	dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
	dev_info(dev, "   Transport methods supported = 0x%x\n",
	       readl(&(tb->TransportSupport)));
	dev_info(dev, "   Transport methods active = 0x%x\n",
	       readl(&(tb->TransportActive)));
	dev_info(dev, "   Requested transport Method = 0x%x\n",
	       readl(&(tb->HostWrite.TransportRequest)));
	dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntDelay)));
	dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntCount)));
7647
	dev_info(dev, "   Max outstanding commands = %d\n",
7648 7649 7650 7651 7652 7653 7654 7655 7656
	       readl(&(tb->CmdsOutMax)));
	dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
	for (i = 0; i < 16; i++)
		temp_name[i] = readb(&(tb->ServerName[i]));
	temp_name[16] = '\0';
	dev_info(dev, "   Server Name = %s\n", temp_name);
	dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
		readl(&(tb->HeartBeat)));
#endif				/* HPSA_DEBUG */
7657
}
7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693

static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
{
	int i, offset, mem_type, bar_type;

	if (pci_bar_addr == PCI_BASE_ADDRESS_0)	/* looking for BAR zero? */
		return 0;
	offset = 0;
	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
		bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
		if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
			offset += 4;
		else {
			mem_type = pci_resource_flags(pdev, i) &
			    PCI_BASE_ADDRESS_MEM_TYPE_MASK;
			switch (mem_type) {
			case PCI_BASE_ADDRESS_MEM_TYPE_32:
			case PCI_BASE_ADDRESS_MEM_TYPE_1M:
				offset += 4;	/* 32 bit */
				break;
			case PCI_BASE_ADDRESS_MEM_TYPE_64:
				offset += 8;
				break;
			default:	/* reserved in PCI 2.2 */
				dev_warn(&pdev->dev,
				       "base address is invalid\n");
				return -1;
				break;
			}
		}
		if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
			return i + 1;
	}
	return -1;
}

7694 7695
static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
{
7696 7697
	pci_free_irq_vectors(h->pdev);
	h->msix_vectors = 0;
7698 7699
}

7700
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
7701
 * controllers that are capable. If not, we use legacy INTx mode.
7702
 */
7703
static int hpsa_interrupt_mode(struct ctlr_info *h)
7704
{
7705 7706
	unsigned int flags = PCI_IRQ_LEGACY;
	int ret;
7707 7708

	/* Some boards advertise MSI but don't really support it */
7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720
	switch (h->board_id) {
	case 0x40700E11:
	case 0x40800E11:
	case 0x40820E11:
	case 0x40830E11:
		break;
	default:
		ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
				PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
		if (ret > 0) {
			h->msix_vectors = ret;
			return 0;
7721
		}
7722 7723 7724

		flags |= PCI_IRQ_MSI;
		break;
7725
	}
7726 7727 7728 7729 7730

	ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
	if (ret < 0)
		return ret;
	return 0;
7731 7732
}

7733
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
7734 7735 7736 7737 7738 7739 7740 7741 7742 7743 7744 7745 7746
{
	int i;
	u32 subsystem_vendor_id, subsystem_device_id;

	subsystem_vendor_id = pdev->subsystem_vendor;
	subsystem_device_id = pdev->subsystem_device;
	*board_id = ((subsystem_device_id << 16) & 0xffff0000) |
		    subsystem_vendor_id;

	for (i = 0; i < ARRAY_SIZE(products); i++)
		if (*board_id == products[i].board_id)
			return i;

7747 7748 7749
	if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
		subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
		!hpsa_allow_any) {
7750 7751 7752 7753 7754 7755 7756
		dev_warn(&pdev->dev, "unrecognized board ID: "
			"0x%08x, ignoring.\n", *board_id);
			return -ENODEV;
	}
	return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}

7757 7758
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar)
7759 7760 7761 7762
{
	int i;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7763
		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7764
			/* addressing mode bits already removed */
7765 7766
			*memory_bar = pci_resource_start(pdev, i);
			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7767 7768 7769
				*memory_bar);
			return 0;
		}
7770
	dev_warn(&pdev->dev, "no memory BAR found\n");
7771 7772 7773
	return -ENODEV;
}

7774 7775
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready)
7776
{
7777
	int i, iterations;
7778
	u32 scratchpad;
7779 7780 7781 7782
	if (wait_for_ready)
		iterations = HPSA_BOARD_READY_ITERATIONS;
	else
		iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7783

7784 7785 7786 7787 7788 7789 7790 7791 7792
	for (i = 0; i < iterations; i++) {
		scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
		if (wait_for_ready) {
			if (scratchpad == HPSA_FIRMWARE_READY)
				return 0;
		} else {
			if (scratchpad != HPSA_FIRMWARE_READY)
				return 0;
		}
7793 7794
		msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
	}
7795
	dev_warn(&pdev->dev, "board not ready, timed out.\n");
7796 7797 7798
	return -ENODEV;
}

7799 7800 7801
static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset)
7802 7803 7804 7805 7806 7807 7808 7809 7810 7811 7812 7813
{
	*cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
	*cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
	*cfg_base_addr &= (u32) 0x0000ffff;
	*cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
	if (*cfg_base_addr_index == -1) {
		dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
		return -ENODEV;
	}
	return 0;
}

R
Robert Elliott 已提交
7814 7815
static void hpsa_free_cfgtables(struct ctlr_info *h)
{
R
Robert Elliott 已提交
7816
	if (h->transtable) {
R
Robert Elliott 已提交
7817
		iounmap(h->transtable);
R
Robert Elliott 已提交
7818 7819 7820
		h->transtable = NULL;
	}
	if (h->cfgtable) {
R
Robert Elliott 已提交
7821
		iounmap(h->cfgtable);
R
Robert Elliott 已提交
7822 7823
		h->cfgtable = NULL;
	}
R
Robert Elliott 已提交
7824 7825 7826 7827 7828
}

/* Find and map CISS config table and transfer table
+ * several items must be unmapped (freed) later
+ * */
7829
static int hpsa_find_cfgtables(struct ctlr_info *h)
7830
{
7831 7832 7833
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
7834
	u32 trans_offset;
7835
	int rc;
7836

7837 7838 7839 7840
	rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
		&cfg_base_addr_index, &cfg_offset);
	if (rc)
		return rc;
7841
	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7842
		       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7843 7844
	if (!h->cfgtable) {
		dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7845
		return -ENOMEM;
7846
	}
7847 7848 7849
	rc = write_driver_ver_to_cfgtable(h->cfgtable);
	if (rc)
		return rc;
7850
	/* Find performant mode table. */
7851
	trans_offset = readl(&h->cfgtable->TransMethodOffset);
7852 7853 7854
	h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
				cfg_base_addr_index)+cfg_offset+trans_offset,
				sizeof(*h->transtable));
R
Robert Elliott 已提交
7855 7856 7857
	if (!h->transtable) {
		dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
		hpsa_free_cfgtables(h);
7858
		return -ENOMEM;
R
Robert Elliott 已提交
7859
	}
7860 7861 7862
	return 0;
}

7863
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7864
{
7865 7866 7867 7868
#define MIN_MAX_COMMANDS 16
	BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);

	h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7869 7870 7871 7872 7873

	/* Limit commands in memory limited kdump scenario. */
	if (reset_devices && h->max_commands > 32)
		h->max_commands = 32;

7874 7875 7876 7877 7878 7879
	if (h->max_commands < MIN_MAX_COMMANDS) {
		dev_warn(&h->pdev->dev,
			"Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
			h->max_commands,
			MIN_MAX_COMMANDS);
		h->max_commands = MIN_MAX_COMMANDS;
7880 7881 7882
	}
}

7883 7884 7885 7886 7887 7888 7889 7890 7891
/* If the controller reports that the total max sg entries is greater than 512,
 * then we know that chained SG blocks work.  (Original smart arrays did not
 * support chained SG blocks and would return zero for max sg entries.)
 */
static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
{
	return h->maxsgentries > 512;
}

7892 7893 7894 7895
/* Interrogate the hardware for some limits:
 * max commands, max SG elements without chaining, and with chaining,
 * SG chain block size, etc.
 */
7896
static void hpsa_find_board_params(struct ctlr_info *h)
7897
{
7898
	hpsa_get_max_perf_mode_cmds(h);
7899
	h->nr_cmds = h->max_commands;
7900
	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7901
	h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7902 7903
	if (hpsa_supports_chained_sg_blocks(h)) {
		/* Limit in-command s/g elements to 32 save dma'able memory. */
7904
		h->max_cmd_sg_entries = 32;
7905
		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7906 7907
		h->maxsgentries--; /* save one for chain pointer */
	} else {
7908 7909 7910 7911 7912 7913
		/*
		 * Original smart arrays supported at most 31 s/g entries
		 * embedded inline in the command (trying to use more
		 * would lock up the controller)
		 */
		h->max_cmd_sg_entries = 31;
7914
		h->maxsgentries = 31; /* default to traditional values */
7915
		h->chainsize = 0;
7916
	}
7917 7918 7919

	/* Find out what task management functions are supported and cache */
	h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7920 7921 7922 7923
	if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
	if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
7924 7925
	if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7926 7927
}

7928 7929
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
A
Akinobu Mita 已提交
7930
	if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7931
		dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7932 7933 7934 7935 7936
		return false;
	}
	return true;
}

7937
static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7938
{
7939
	u32 driver_support;
7940

7941
	driver_support = readl(&(h->cfgtable->driver_support));
A
Arnd Bergmann 已提交
7942 7943
	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
#ifdef CONFIG_X86
7944
	driver_support |= ENABLE_SCSI_PREFETCH;
7945
#endif
7946 7947
	driver_support |= ENABLE_UNIT_ATTN;
	writel(driver_support, &(h->cfgtable->driver_support));
7948 7949
}

7950 7951 7952 7953 7954 7955 7956 7957 7958 7959 7960 7961 7962 7963
/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
 * in a prefetch beyond physical memory.
 */
static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
{
	u32 dma_prefetch;

	if (h->board_id != 0x3225103C)
		return;
	dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
	dma_prefetch |= 0x8000;
	writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
}

7964
static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7965 7966 7967 7968 7969
{
	int i;
	u32 doorbell_value;
	unsigned long flags;
	/* wait until the clear_event_notify bit 6 is cleared by controller. */
7970
	for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7971 7972 7973 7974
		spin_lock_irqsave(&h->lock, flags);
		doorbell_value = readl(h->vaddr + SA5_DOORBELL);
		spin_unlock_irqrestore(&h->lock, flags);
		if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
7975
			goto done;
7976
		/* delay and try again */
7977
		msleep(CLEAR_EVENT_WAIT_INTERVAL);
7978
	}
7979 7980 7981
	return -ENODEV;
done:
	return 0;
7982 7983
}

7984
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7985 7986
{
	int i;
7987 7988
	u32 doorbell_value;
	unsigned long flags;
7989 7990 7991 7992 7993

	/* under certain very rare conditions, this can take awhile.
	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
	 * as we enter this code.)
	 */
7994
	for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7995 7996
		if (h->remove_in_progress)
			goto done;
7997 7998 7999
		spin_lock_irqsave(&h->lock, flags);
		doorbell_value = readl(h->vaddr + SA5_DOORBELL);
		spin_unlock_irqrestore(&h->lock, flags);
D
Dan Carpenter 已提交
8000
		if (!(doorbell_value & CFGTBL_ChangeReq))
8001
			goto done;
8002
		/* delay and try again */
8003
		msleep(MODE_CHANGE_WAIT_INTERVAL);
8004
	}
8005 8006 8007
	return -ENODEV;
done:
	return 0;
8008 8009
}

8010
/* return -ENODEV or other reason on error, 0 on success */
8011
static int hpsa_enter_simple_mode(struct ctlr_info *h)
8012 8013 8014 8015 8016 8017 8018 8019
{
	u32 trans_support;

	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & SIMPLE_MODE))
		return -ENOTSUPP;

	h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
8020

8021 8022
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
8023
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
8024
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8025 8026
	if (hpsa_wait_for_mode_change_ack(h))
		goto error;
8027
	print_cfg_table(&h->pdev->dev, h->cfgtable);
8028 8029
	if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
		goto error;
8030
	h->transMethod = CFGTBL_Trans_Simple;
8031
	return 0;
8032
error:
8033
	dev_err(&h->pdev->dev, "failed to enter simple mode\n");
8034
	return -ENODEV;
8035 8036
}

R
Robert Elliott 已提交
8037 8038 8039 8040 8041
/* free items allocated or mapped by hpsa_pci_init */
static void hpsa_free_pci_init(struct ctlr_info *h)
{
	hpsa_free_cfgtables(h);			/* pci_init 4 */
	iounmap(h->vaddr);			/* pci_init 3 */
R
Robert Elliott 已提交
8042
	h->vaddr = NULL;
R
Robert Elliott 已提交
8043
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
8044 8045 8046 8047
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
8048
	pci_disable_device(h->pdev);		/* pci_init 1 */
8049
	pci_release_regions(h->pdev);		/* pci_init 2 */
R
Robert Elliott 已提交
8050 8051 8052
}

/* several items must be freed later */
8053
static int hpsa_pci_init(struct ctlr_info *h)
8054
{
8055
	int prod_index, err;
8056

8057 8058
	prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
	if (prod_index < 0)
8059
		return prod_index;
8060 8061
	h->product_name = products[prod_index].product_name;
	h->access = *(products[prod_index].access);
8062

S
Stephen Cameron 已提交
8063 8064 8065
	h->needs_abort_tags_swizzled =
		ctlr_needs_abort_tags_swizzled(h->board_id);

M
Matthew Garrett 已提交
8066 8067 8068
	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);

8069
	err = pci_enable_device(h->pdev);
8070
	if (err) {
R
Robert Elliott 已提交
8071
		dev_err(&h->pdev->dev, "failed to enable PCI device\n");
8072
		pci_disable_device(h->pdev);
8073 8074 8075
		return err;
	}

8076
	err = pci_request_regions(h->pdev, HPSA);
8077
	if (err) {
8078
		dev_err(&h->pdev->dev,
R
Robert Elliott 已提交
8079
			"failed to obtain PCI resources\n");
8080 8081
		pci_disable_device(h->pdev);
		return err;
8082
	}
8083 8084 8085

	pci_set_master(h->pdev);

8086 8087 8088
	err = hpsa_interrupt_mode(h);
	if (err)
		goto clean1;
8089
	err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
8090
	if (err)
R
Robert Elliott 已提交
8091
		goto clean2;	/* intmode+region, pci */
8092
	h->vaddr = remap_pci_mem(h->paddr, 0x250);
8093
	if (!h->vaddr) {
R
Robert Elliott 已提交
8094
		dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
8095
		err = -ENOMEM;
R
Robert Elliott 已提交
8096
		goto clean2;	/* intmode+region, pci */
8097
	}
8098
	err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8099
	if (err)
R
Robert Elliott 已提交
8100
		goto clean3;	/* vaddr, intmode+region, pci */
8101 8102
	err = hpsa_find_cfgtables(h);
	if (err)
R
Robert Elliott 已提交
8103
		goto clean3;	/* vaddr, intmode+region, pci */
8104
	hpsa_find_board_params(h);
8105

8106
	if (!hpsa_CISS_signature_present(h)) {
8107
		err = -ENODEV;
R
Robert Elliott 已提交
8108
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
8109
	}
8110
	hpsa_set_driver_support_bits(h);
8111
	hpsa_p600_dma_prefetch_quirk(h);
8112 8113
	err = hpsa_enter_simple_mode(h);
	if (err)
R
Robert Elliott 已提交
8114
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
8115 8116
	return 0;

R
Robert Elliott 已提交
8117 8118 8119 8120
clean4:	/* cfgtables, vaddr, intmode+region, pci */
	hpsa_free_cfgtables(h);
clean3:	/* vaddr, intmode+region, pci */
	iounmap(h->vaddr);
R
Robert Elliott 已提交
8121
	h->vaddr = NULL;
R
Robert Elliott 已提交
8122 8123
clean2:	/* intmode+region, pci */
	hpsa_disable_interrupt_mode(h);
8124
clean1:
8125 8126 8127 8128
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
8129
	pci_disable_device(h->pdev);
8130
	pci_release_regions(h->pdev);
8131 8132 8133
	return err;
}

8134
static void hpsa_hba_inquiry(struct ctlr_info *h)
8135 8136 8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149
{
	int rc;

#define HBA_INQUIRY_BYTE_COUNT 64
	h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
	if (!h->hba_inquiry_data)
		return;
	rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
		h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
	if (rc != 0) {
		kfree(h->hba_inquiry_data);
		h->hba_inquiry_data = NULL;
	}
}

8150
static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
8151
{
8152
	int rc, i;
8153
	void __iomem *vaddr;
8154 8155 8156 8157

	if (!reset_devices)
		return 0;

8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173
	/* kdump kernel is loading, we don't know in which state is
	 * the pci interface. The dev->enable_cnt is equal zero
	 * so we call enable+disable, wait a while and switch it on.
	 */
	rc = pci_enable_device(pdev);
	if (rc) {
		dev_warn(&pdev->dev, "Failed to enable PCI device\n");
		return -ENODEV;
	}
	pci_disable_device(pdev);
	msleep(260);			/* a randomly chosen number */
	rc = pci_enable_device(pdev);
	if (rc) {
		dev_warn(&pdev->dev, "failed to enable device.\n");
		return -ENODEV;
	}
8174

8175
	pci_set_master(pdev);
8176

8177 8178 8179 8180 8181 8182 8183 8184
	vaddr = pci_ioremap_bar(pdev, 0);
	if (vaddr == NULL) {
		rc = -ENOMEM;
		goto out_disable;
	}
	writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	iounmap(vaddr);

8185
	/* Reset the controller with a PCI power-cycle or via doorbell */
8186
	rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
8187

8188 8189
	/* -ENOTSUPP here means we cannot reset the controller
	 * but it's already (and still) up and running in
8190 8191
	 * "performant mode".  Or, it might be 640x, which can't reset
	 * due to concerns about shared bbwc between 6402/6404 pair.
8192
	 */
8193
	if (rc)
8194
		goto out_disable;
8195 8196

	/* Now try to get the controller to respond to a no-op */
8197
	dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
8198 8199 8200 8201 8202 8203 8204
	for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
		if (hpsa_noop(pdev) == 0)
			break;
		else
			dev_warn(&pdev->dev, "no-op failed%s\n",
					(i < 11 ? "; re-trying" : ""));
	}
8205 8206 8207 8208 8209

out_disable:

	pci_disable_device(pdev);
	return rc;
8210 8211
}

8212 8213 8214
static void hpsa_free_cmd_pool(struct ctlr_info *h)
{
	kfree(h->cmd_pool_bits);
R
Robert Elliott 已提交
8215 8216
	h->cmd_pool_bits = NULL;
	if (h->cmd_pool) {
8217 8218 8219 8220
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct CommandList),
				h->cmd_pool,
				h->cmd_pool_dhandle);
R
Robert Elliott 已提交
8221 8222 8223 8224
		h->cmd_pool = NULL;
		h->cmd_pool_dhandle = 0;
	}
	if (h->errinfo_pool) {
8225 8226 8227 8228
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct ErrorInfo),
				h->errinfo_pool,
				h->errinfo_pool_dhandle);
R
Robert Elliott 已提交
8229 8230 8231
		h->errinfo_pool = NULL;
		h->errinfo_pool_dhandle = 0;
	}
8232 8233
}

8234
static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248
{
	h->cmd_pool_bits = kzalloc(
		DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
		sizeof(unsigned long), GFP_KERNEL);
	h->cmd_pool = pci_alloc_consistent(h->pdev,
		    h->nr_cmds * sizeof(*h->cmd_pool),
		    &(h->cmd_pool_dhandle));
	h->errinfo_pool = pci_alloc_consistent(h->pdev,
		    h->nr_cmds * sizeof(*h->errinfo_pool),
		    &(h->errinfo_pool_dhandle));
	if ((h->cmd_pool_bits == NULL)
	    || (h->cmd_pool == NULL)
	    || (h->errinfo_pool == NULL)) {
		dev_err(&h->pdev->dev, "out of memory in %s", __func__);
8249
		goto clean_up;
8250
	}
8251
	hpsa_preinitialize_commands(h);
8252
	return 0;
8253 8254 8255
clean_up:
	hpsa_free_cmd_pool(h);
	return -ENOMEM;
8256 8257
}

8258 8259 8260 8261 8262
/* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
static void hpsa_free_irqs(struct ctlr_info *h)
{
	int i;

8263
	if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
8264
		/* Single reply queue, only one irq to free */
8265
		free_irq(pci_irq_vector(h->pdev, 0), &h->q[h->intr_mode]);
8266
		h->q[h->intr_mode] = 0;
8267 8268 8269
		return;
	}

8270 8271
	for (i = 0; i < h->msix_vectors; i++) {
		free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
R
Robert Elliott 已提交
8272
		h->q[i] = 0;
8273
	}
8274 8275
	for (; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = 0;
8276 8277
}

8278 8279
/* returns 0 on success; cleans up and returns -Enn on error */
static int hpsa_request_irqs(struct ctlr_info *h,
8280 8281 8282
	irqreturn_t (*msixhandler)(int, void *),
	irqreturn_t (*intxhandler)(int, void *))
{
8283
	int rc, i;
8284

8285 8286 8287 8288 8289 8290 8291
	/*
	 * initialize h->q[x] = x so that interrupt handlers know which
	 * queue to process.
	 */
	for (i = 0; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = (u8) i;

8292
	if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
8293
		/* If performant mode and MSI-X, use multiple reply queues */
8294
		for (i = 0; i < h->msix_vectors; i++) {
8295
			sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
8296
			rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
8297
					0, h->intrname[i],
8298
					&h->q[i]);
8299 8300 8301 8302 8303
			if (rc) {
				int j;

				dev_err(&h->pdev->dev,
					"failed to get irq %d for %s\n",
8304
				       pci_irq_vector(h->pdev, i), h->devname);
8305
				for (j = 0; j < i; j++) {
8306
					free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
8307 8308 8309 8310 8311 8312 8313
					h->q[j] = 0;
				}
				for (; j < MAX_REPLY_QUEUES; j++)
					h->q[j] = 0;
				return rc;
			}
		}
8314 8315
	} else {
		/* Use single reply pool */
8316 8317 8318 8319
		if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
			sprintf(h->intrname[0], "%s-msi%s", h->devname,
				h->msix_vectors ? "x" : "");
			rc = request_irq(pci_irq_vector(h->pdev, 0),
8320
				msixhandler, 0,
8321
				h->intrname[0],
8322 8323
				&h->q[h->intr_mode]);
		} else {
8324 8325
			sprintf(h->intrname[h->intr_mode],
				"%s-intx", h->devname);
8326
			rc = request_irq(pci_irq_vector(h->pdev, 0),
8327
				intxhandler, IRQF_SHARED,
8328
				h->intrname[0],
8329 8330 8331
				&h->q[h->intr_mode]);
		}
	}
8332
	if (rc) {
R
Robert Elliott 已提交
8333
		dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8334
		       pci_irq_vector(h->pdev, 0), h->devname);
R
Robert Elliott 已提交
8335
		hpsa_free_irqs(h);
8336 8337 8338 8339 8340
		return -ENODEV;
	}
	return 0;
}

8341
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8342
{
8343
	int rc;
8344
	hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER);
8345 8346

	dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8347 8348
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
	if (rc) {
8349
		dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8350
		return rc;
8351 8352 8353
	}

	dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8354 8355
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
	if (rc) {
8356 8357
		dev_warn(&h->pdev->dev, "Board failed to become ready "
			"after soft reset.\n");
8358
		return rc;
8359 8360 8361 8362 8363
	}

	return 0;
}

8364 8365 8366 8367 8368 8369 8370
static void hpsa_free_reply_queues(struct ctlr_info *h)
{
	int i;

	for (i = 0; i < h->nreply_queues; i++) {
		if (!h->reply_queue[i].head)
			continue;
8371 8372 8373 8374
		pci_free_consistent(h->pdev,
					h->reply_queue_size,
					h->reply_queue[i].head,
					h->reply_queue[i].busaddr);
8375 8376 8377
		h->reply_queue[i].head = NULL;
		h->reply_queue[i].busaddr = 0;
	}
R
Robert Elliott 已提交
8378
	h->reply_queue_size = 0;
8379 8380
}

8381 8382
static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
R
Robert Elliott 已提交
8383 8384 8385 8386
	hpsa_free_performant_mode(h);		/* init_one 7 */
	hpsa_free_sg_chain_blocks(h);		/* init_one 6 */
	hpsa_free_cmd_pool(h);			/* init_one 5 */
	hpsa_free_irqs(h);			/* init_one 4 */
8387 8388 8389
	scsi_host_put(h->scsi_host);		/* init_one 3 */
	h->scsi_host = NULL;			/* init_one 3 */
	hpsa_free_pci_init(h);			/* init_one 2_5 */
8390 8391 8392 8393 8394 8395 8396 8397 8398 8399
	free_percpu(h->lockup_detected);	/* init_one 2 */
	h->lockup_detected = NULL;		/* init_one 2 */
	if (h->resubmit_wq) {
		destroy_workqueue(h->resubmit_wq);	/* init_one 1 */
		h->resubmit_wq = NULL;
	}
	if (h->rescan_ctlr_wq) {
		destroy_workqueue(h->rescan_ctlr_wq);
		h->rescan_ctlr_wq = NULL;
	}
R
Robert Elliott 已提交
8400
	kfree(h);				/* init_one 1 */
8401 8402
}

8403
/* Called when controller lockup detected. */
8404
static void fail_all_outstanding_cmds(struct ctlr_info *h)
8405
{
8406 8407
	int i, refcount;
	struct CommandList *c;
8408
	int failcount = 0;
8409

8410
	flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8411 8412
	for (i = 0; i < h->nr_cmds; i++) {
		c = h->cmd_pool + i;
8413 8414
		refcount = atomic_inc_return(&c->refcount);
		if (refcount > 1) {
8415
			c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8416
			finish_cmd(c);
8417
			atomic_dec(&h->commands_outstanding);
8418
			failcount++;
8419 8420
		}
		cmd_free(h, c);
8421
	}
8422 8423
	dev_warn(&h->pdev->dev,
		"failed %d commands in fail_all\n", failcount);
8424 8425
}

8426 8427
static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
{
8428
	int cpu;
8429

8430
	for_each_online_cpu(cpu) {
8431 8432 8433 8434 8435 8436 8437
		u32 *lockup_detected;
		lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
		*lockup_detected = value;
	}
	wmb(); /* be sure the per-cpu variables are out to memory */
}

8438 8439 8440
static void controller_lockup_detected(struct ctlr_info *h)
{
	unsigned long flags;
8441
	u32 lockup_detected;
8442 8443 8444

	h->access.set_intr_mask(h, HPSA_INTR_OFF);
	spin_lock_irqsave(&h->lock, flags);
8445 8446 8447 8448
	lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
	if (!lockup_detected) {
		/* no heartbeat, but controller gave us a zero. */
		dev_warn(&h->pdev->dev,
8449 8450
			"lockup detected after %d but scratchpad register is zero\n",
			h->heartbeat_sample_interval / HZ);
8451 8452 8453
		lockup_detected = 0xffffffff;
	}
	set_lockup_detected_for_all_cpus(h, lockup_detected);
8454
	spin_unlock_irqrestore(&h->lock, flags);
8455 8456
	dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
			lockup_detected, h->heartbeat_sample_interval / HZ);
8457
	pci_disable_device(h->pdev);
8458
	fail_all_outstanding_cmds(h);
8459 8460
}

8461
static int detect_controller_lockup(struct ctlr_info *h)
8462 8463 8464 8465 8466 8467 8468 8469
{
	u64 now;
	u32 heartbeat;
	unsigned long flags;

	now = get_jiffies_64();
	/* If we've received an interrupt recently, we're ok. */
	if (time_after64(h->last_intr_timestamp +
8470
				(h->heartbeat_sample_interval), now))
8471
		return false;
8472 8473 8474 8475 8476 8477 8478

	/*
	 * If we've already checked the heartbeat recently, we're ok.
	 * This could happen if someone sends us a signal. We
	 * otherwise don't care about signals in this thread.
	 */
	if (time_after64(h->last_heartbeat_timestamp +
8479
				(h->heartbeat_sample_interval), now))
8480
		return false;
8481 8482 8483 8484 8485 8486 8487

	/* If heartbeat has not changed since we last looked, we're not ok. */
	spin_lock_irqsave(&h->lock, flags);
	heartbeat = readl(&h->cfgtable->HeartBeat);
	spin_unlock_irqrestore(&h->lock, flags);
	if (h->last_heartbeat == heartbeat) {
		controller_lockup_detected(h);
8488
		return true;
8489 8490 8491 8492 8493
	}

	/* We're ok. */
	h->last_heartbeat = heartbeat;
	h->last_heartbeat_timestamp = now;
8494
	return false;
8495 8496
}

8497
static void hpsa_ack_ctlr_events(struct ctlr_info *h)
8498 8499 8500 8501
{
	int i;
	char *event_type;

8502 8503 8504
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
		return;

8505
	/* Ask the controller to clear the events we're handling. */
8506 8507
	if ((h->transMethod & (CFGTBL_Trans_io_accel1
			| CFGTBL_Trans_io_accel2)) &&
8508 8509 8510 8511 8512 8513 8514 8515 8516
		(h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
		 h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {

		if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
			event_type = "state change";
		if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
			event_type = "configuration change";
		/* Stop sending new RAID offload reqs via the IO accelerator */
		scsi_block_requests(h->scsi_host);
8517
		for (i = 0; i < h->ndevices; i++) {
8518
			h->dev[i]->offload_enabled = 0;
8519 8520
			h->dev[i]->offload_to_be_enabled = 0;
		}
8521
		hpsa_drain_accel_commands(h);
8522 8523 8524 8525 8526 8527 8528 8529 8530 8531 8532 8533 8534 8535 8536 8537 8538 8539 8540 8541
		/* Set 'accelerator path config change' bit */
		dev_warn(&h->pdev->dev,
			"Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
			h->events, event_type);
		writel(h->events, &(h->cfgtable->clear_event_notify));
		/* Set the "clear event notify field update" bit 6 */
		writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
		/* Wait until ctlr clears 'clear event notify field', bit 6 */
		hpsa_wait_for_clear_event_notify_ack(h);
		scsi_unblock_requests(h->scsi_host);
	} else {
		/* Acknowledge controller notification events. */
		writel(h->events, &(h->cfgtable->clear_event_notify));
		writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
		hpsa_wait_for_clear_event_notify_ack(h);
#if 0
		writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
		hpsa_wait_for_mode_change_ack(h);
#endif
	}
8542
	return;
8543 8544 8545 8546
}

/* Check a register on the controller to see if there are configuration
 * changes (added/changed/removed logical drives, etc.) which mean that
8547 8548
 * we should rescan the controller for devices.
 * Also check flag for driver-initiated rescan.
8549
 */
8550
static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8551
{
D
Don Brace 已提交
8552 8553 8554 8555 8556
	if (h->drv_req_rescan) {
		h->drv_req_rescan = 0;
		return 1;
	}

8557
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8558
		return 0;
8559 8560

	h->events = readl(&(h->cfgtable->event_notify));
8561 8562
	return h->events & RESCAN_REQUIRED_EVENT_BITS;
}
8563

8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577
/*
 * Check if any of the offline devices have become ready
 */
static int hpsa_offline_devices_ready(struct ctlr_info *h)
{
	unsigned long flags;
	struct offline_device_entry *d;
	struct list_head *this, *tmp;

	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_for_each_safe(this, tmp, &h->offline_device_list) {
		d = list_entry(this, struct offline_device_entry,
				offline_list);
		spin_unlock_irqrestore(&h->offline_device_lock, flags);
8578 8579 8580 8581
		if (!hpsa_volume_offline(h, d->scsi3addr)) {
			spin_lock_irqsave(&h->offline_device_lock, flags);
			list_del(&d->offline_list);
			spin_unlock_irqrestore(&h->offline_device_lock, flags);
8582
			return 1;
8583
		}
8584 8585 8586 8587
		spin_lock_irqsave(&h->offline_device_lock, flags);
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
	return 0;
8588 8589
}

8590 8591 8592 8593 8594 8595 8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620 8621 8622 8623 8624
static int hpsa_luns_changed(struct ctlr_info *h)
{
	int rc = 1; /* assume there are changes */
	struct ReportLUNdata *logdev = NULL;

	/* if we can't find out if lun data has changed,
	 * assume that it has.
	 */

	if (!h->lastlogicals)
		goto out;

	logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
	if (!logdev) {
		dev_warn(&h->pdev->dev,
			"Out of memory, can't track lun changes.\n");
		goto out;
	}
	if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
		dev_warn(&h->pdev->dev,
			"report luns failed, can't track lun changes.\n");
		goto out;
	}
	if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
		dev_info(&h->pdev->dev,
			"Lun changes detected.\n");
		memcpy(h->lastlogicals, logdev, sizeof(*logdev));
		goto out;
	} else
		rc = 0; /* no changes detected. */
out:
	kfree(logdev);
	return rc;
}

8625
static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8626 8627
{
	unsigned long flags;
8628
	struct ctlr_info *h = container_of(to_delayed_work(work),
8629 8630 8631 8632
					struct ctlr_info, rescan_ctlr_work);


	if (h->remove_in_progress)
8633
		return;
8634

D
Don Brace 已提交
8635 8636 8637 8638 8639 8640 8641 8642
	/*
	 * Do the scan after the reset
	 */
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
		return;
	}

8643 8644 8645 8646 8647
	if (hpsa_ctlr_needs_rescan(h) || hpsa_offline_devices_ready(h)) {
		scsi_host_get(h->scsi_host);
		hpsa_ack_ctlr_events(h);
		hpsa_scan_start(h->scsi_host);
		scsi_host_put(h->scsi_host);
8648
	} else if (h->discovery_polling) {
S
Scott Teel 已提交
8649
		hpsa_disable_rld_caching(h);
8650 8651 8652 8653 8654 8655 8656 8657 8658 8659 8660
		if (hpsa_luns_changed(h)) {
			struct Scsi_Host *sh = NULL;

			dev_info(&h->pdev->dev,
				"driver discovery polling rescan.\n");
			sh = scsi_host_get(h->scsi_host);
			if (sh != NULL) {
				hpsa_scan_start(sh);
				scsi_host_put(sh);
			}
		}
8661
	}
8662
	spin_lock_irqsave(&h->lock, flags);
8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676
	if (!h->remove_in_progress)
		queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
}

static void hpsa_monitor_ctlr_worker(struct work_struct *work)
{
	unsigned long flags;
	struct ctlr_info *h = container_of(to_delayed_work(work),
					struct ctlr_info, monitor_ctlr_work);

	detect_controller_lockup(h);
	if (lockup_detected(h))
8677
		return;
8678 8679 8680 8681

	spin_lock_irqsave(&h->lock, flags);
	if (!h->remove_in_progress)
		schedule_delayed_work(&h->monitor_ctlr_work,
8682 8683
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
8684 8685
}

8686 8687 8688 8689 8690
static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
						char *name)
{
	struct workqueue_struct *wq = NULL;

8691
	wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8692 8693 8694 8695 8696 8697
	if (!wq)
		dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);

	return wq;
}

8698
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8699
{
8700
	int dac, rc;
8701
	struct ctlr_info *h;
8702 8703
	int try_soft_reset = 0;
	unsigned long flags;
8704
	u32 board_id;
8705 8706 8707 8708

	if (number_of_controllers == 0)
		printk(KERN_INFO DRIVER_NAME "\n");

8709 8710 8711 8712 8713 8714 8715
	rc = hpsa_lookup_board_id(pdev, &board_id);
	if (rc < 0) {
		dev_warn(&pdev->dev, "Board ID not found\n");
		return rc;
	}

	rc = hpsa_init_reset_devices(pdev, board_id);
8716 8717 8718 8719 8720 8721 8722 8723 8724 8725 8726 8727 8728
	if (rc) {
		if (rc != -ENOTSUPP)
			return rc;
		/* If the reset fails in a particular way (it has no way to do
		 * a proper hard reset, so returns -ENOTSUPP) we can try to do
		 * a soft reset once we get the controller configured up to the
		 * point that it can accept a command.
		 */
		try_soft_reset = 1;
		rc = 0;
	}

reinit_after_soft_reset:
8729

8730 8731 8732 8733 8734
	/* Command structures must be aligned on a 32-byte boundary because
	 * the 5 lower bits of the address are used by the hardware. and by
	 * the driver.  See comments in hpsa.h for more info.
	 */
	BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
8735
	h = kzalloc(sizeof(*h), GFP_KERNEL);
R
Robert Elliott 已提交
8736 8737
	if (!h) {
		dev_err(&pdev->dev, "Failed to allocate controller head\n");
8738
		return -ENOMEM;
R
Robert Elliott 已提交
8739
	}
8740

8741
	h->pdev = pdev;
R
Robert Elliott 已提交
8742

8743
	h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8744
	INIT_LIST_HEAD(&h->offline_device_list);
8745
	spin_lock_init(&h->lock);
8746
	spin_lock_init(&h->offline_device_lock);
8747
	spin_lock_init(&h->scan_lock);
8748
	atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
S
Stephen Cameron 已提交
8749
	atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
8750 8751 8752

	/* Allocate and clear per-cpu variable lockup_detected */
	h->lockup_detected = alloc_percpu(u32);
8753
	if (!h->lockup_detected) {
R
Robert Elliott 已提交
8754
		dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8755
		rc = -ENOMEM;
8756
		goto clean1;	/* aer/h */
8757
	}
8758 8759
	set_lockup_detected_for_all_cpus(h, 0);

8760
	rc = hpsa_pci_init(h);
R
Robert Elliott 已提交
8761
	if (rc)
8762 8763 8764 8765 8766 8767 8768
		goto clean2;	/* lu, aer/h */

	/* relies on h-> settings made by hpsa_pci_init, including
	 * interrupt_mode h->intr */
	rc = hpsa_scsi_host_alloc(h);
	if (rc)
		goto clean2_5;	/* pci, lu, aer/h */
8769

8770
	sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8771 8772 8773 8774
	h->ctlr = number_of_controllers;
	number_of_controllers++;

	/* configure PCI DMA stuff */
8775 8776
	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc == 0) {
8777
		dac = 1;
8778 8779 8780 8781 8782 8783
	} else {
		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (rc == 0) {
			dac = 0;
		} else {
			dev_err(&pdev->dev, "no suitable DMA available\n");
8784
			goto clean3;	/* shost, pci, lu, aer/h */
8785
		}
8786 8787 8788 8789
	}

	/* make sure the board interrupts are off */
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
8790

R
Robert Elliott 已提交
8791 8792
	rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
	if (rc)
8793
		goto clean3;	/* shost, pci, lu, aer/h */
8794
	rc = hpsa_alloc_cmd_pool(h);
8795
	if (rc)
8796
		goto clean4;	/* irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8797 8798
	rc = hpsa_alloc_sg_chain_blocks(h);
	if (rc)
8799
		goto clean5;	/* cmd, irq, shost, pci, lu, aer/h */
8800
	init_waitqueue_head(&h->scan_wait_queue);
S
Stephen Cameron 已提交
8801
	init_waitqueue_head(&h->abort_cmd_wait_queue);
W
Webb Scales 已提交
8802 8803
	init_waitqueue_head(&h->event_sync_wait_queue);
	mutex_init(&h->reset_mutex);
8804
	h->scan_finished = 1; /* no scan currently in progress */
8805 8806

	pci_set_drvdata(pdev, h);
8807
	h->ndevices = 0;
8808

8809
	spin_lock_init(&h->devlock);
R
Robert Elliott 已提交
8810 8811
	rc = hpsa_put_ctlr_into_performant_mode(h);
	if (rc)
8812 8813
		goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */

8814 8815 8816 8817 8818 8819 8820 8821 8822 8823 8824 8825
	/* create the resubmit workqueue */
	h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
	if (!h->rescan_ctlr_wq) {
		rc = -ENOMEM;
		goto clean7;
	}

	h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
	if (!h->resubmit_wq) {
		rc = -ENOMEM;
		goto clean7;	/* aer/h */
	}
8826

R
Robert Elliott 已提交
8827 8828
	/*
	 * At this point, the controller is ready to take commands.
8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843
	 * Now, if reset_devices and the hard reset didn't work, try
	 * the soft reset and see if that works.
	 */
	if (try_soft_reset) {

		/* This is kind of gross.  We may or may not get a completion
		 * from the soft reset command, and if we do, then the value
		 * from the fifo may or may not be valid.  So, we wait 10 secs
		 * after the reset throwing away any completions we get during
		 * that time.  Unregister the interrupt handler and register
		 * fake ones to scoop up any residual completions.
		 */
		spin_lock_irqsave(&h->lock, flags);
		h->access.set_intr_mask(h, HPSA_INTR_OFF);
		spin_unlock_irqrestore(&h->lock, flags);
8844
		hpsa_free_irqs(h);
8845
		rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8846 8847
					hpsa_intx_discard_completions);
		if (rc) {
8848 8849
			dev_warn(&h->pdev->dev,
				"Failed to request_irq after soft reset.\n");
8850
			/*
8851 8852 8853 8854 8855 8856 8857 8858 8859
			 * cannot goto clean7 or free_irqs will be called
			 * again. Instead, do its work
			 */
			hpsa_free_performant_mode(h);	/* clean7 */
			hpsa_free_sg_chain_blocks(h);	/* clean6 */
			hpsa_free_cmd_pool(h);		/* clean5 */
			/*
			 * skip hpsa_free_irqs(h) clean4 since that
			 * was just called before request_irqs failed
8860 8861
			 */
			goto clean3;
8862 8863 8864 8865 8866
		}

		rc = hpsa_kdump_soft_reset(h);
		if (rc)
			/* Neither hard nor soft reset worked, we're hosed. */
8867
			goto clean7;
8868 8869 8870 8871 8872 8873 8874 8875 8876 8877 8878 8879 8880 8881 8882 8883 8884 8885 8886 8887

		dev_info(&h->pdev->dev, "Board READY.\n");
		dev_info(&h->pdev->dev,
			"Waiting for stale completions to drain.\n");
		h->access.set_intr_mask(h, HPSA_INTR_ON);
		msleep(10000);
		h->access.set_intr_mask(h, HPSA_INTR_OFF);

		rc = controller_reset_failed(h->cfgtable);
		if (rc)
			dev_info(&h->pdev->dev,
				"Soft reset appears to have failed.\n");

		/* since the controller's reset, we have to go back and re-init
		 * everything.  Easiest to just forget what we've done and do it
		 * all over again.
		 */
		hpsa_undo_allocations_after_kdump_soft_reset(h);
		try_soft_reset = 0;
		if (rc)
8888
			/* don't goto clean, we already unallocated */
8889 8890 8891 8892
			return -ENODEV;

		goto reinit_after_soft_reset;
	}
8893

R
Robert Elliott 已提交
8894 8895
	/* Enable Accelerated IO path at driver layer */
	h->acciopath_status = 1;
8896 8897
	/* Disable discovery polling.*/
	h->discovery_polling = 0;
8898

8899

8900 8901 8902
	/* Turn the interrupts on so we can service requests */
	h->access.set_intr_mask(h, HPSA_INTR_ON);

8903
	hpsa_hba_inquiry(h);
8904

8905 8906 8907 8908 8909
	h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
	if (!h->lastlogicals)
		dev_info(&h->pdev->dev,
			"Can't track change to report lun data\n");

8910 8911 8912 8913 8914
	/* hook into SCSI subsystem */
	rc = hpsa_scsi_add_host(h);
	if (rc)
		goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */

8915 8916 8917 8918 8919
	/* Monitor the controller for firmware lockups */
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
	INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
	schedule_delayed_work(&h->monitor_ctlr_work,
				h->heartbeat_sample_interval);
8920 8921 8922
	INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
	queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
				h->heartbeat_sample_interval);
8923
	return 0;
8924

8925
clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8926 8927 8928
	hpsa_free_performant_mode(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8929
	hpsa_free_sg_chain_blocks(h);
8930
clean5: /* cmd, irq, shost, pci, lu, aer/h */
8931
	hpsa_free_cmd_pool(h);
8932
clean4: /* irq, shost, pci, lu, aer/h */
8933
	hpsa_free_irqs(h);
8934 8935 8936 8937
clean3: /* shost, pci, lu, aer/h */
	scsi_host_put(h->scsi_host);
	h->scsi_host = NULL;
clean2_5: /* pci, lu, aer/h */
R
Robert Elliott 已提交
8938
	hpsa_free_pci_init(h);
8939
clean2: /* lu, aer/h */
R
Robert Elliott 已提交
8940 8941 8942 8943 8944 8945
	if (h->lockup_detected) {
		free_percpu(h->lockup_detected);
		h->lockup_detected = NULL;
	}
clean1:	/* wq/aer/h */
	if (h->resubmit_wq) {
8946
		destroy_workqueue(h->resubmit_wq);
R
Robert Elliott 已提交
8947 8948 8949
		h->resubmit_wq = NULL;
	}
	if (h->rescan_ctlr_wq) {
8950
		destroy_workqueue(h->rescan_ctlr_wq);
R
Robert Elliott 已提交
8951 8952
		h->rescan_ctlr_wq = NULL;
	}
8953
	kfree(h);
8954
	return rc;
8955 8956 8957 8958 8959 8960
}

static void hpsa_flush_cache(struct ctlr_info *h)
{
	char *flush_buf;
	struct CommandList *c;
8961
	int rc;
8962

8963
	if (unlikely(lockup_detected(h)))
8964
		return;
8965 8966 8967 8968
	flush_buf = kzalloc(4, GFP_KERNEL);
	if (!flush_buf)
		return;

8969
	c = cmd_alloc(h);
8970

8971 8972 8973 8974
	if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD)) {
		goto out;
	}
8975
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8976
					PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
8977 8978
	if (rc)
		goto out;
8979
	if (c->err_info->CommandStatus != 0)
8980
out:
8981 8982
		dev_warn(&h->pdev->dev,
			"error flushing cache on controller\n");
8983
	cmd_free(h, c);
8984 8985 8986
	kfree(flush_buf);
}

S
Scott Teel 已提交
8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011 9012 9013 9014
/* Make controller gather fresh report lun data each time we
 * send down a report luns request
 */
static void hpsa_disable_rld_caching(struct ctlr_info *h)
{
	u32 *options;
	struct CommandList *c;
	int rc;

	/* Don't bother trying to set diag options if locked up */
	if (unlikely(h->lockup_detected))
		return;

	options = kzalloc(sizeof(*options), GFP_KERNEL);
	if (!options) {
		dev_err(&h->pdev->dev,
			"Error: failed to disable rld caching, during alloc.\n");
		return;
	}

	c = cmd_alloc(h);

	/* first, get the current diag options settings */
	if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9015
		PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
S
Scott Teel 已提交
9016 9017 9018 9019 9020 9021 9022 9023 9024 9025 9026
	if ((rc != 0) || (c->err_info->CommandStatus != 0))
		goto errout;

	/* Now, set the bit for disabling the RLD caching */
	*options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;

	if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9027
		PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
S
Scott Teel 已提交
9028 9029 9030 9031 9032 9033 9034 9035 9036
	if ((rc != 0)  || (c->err_info->CommandStatus != 0))
		goto errout;

	/* Now verify that it got set: */
	if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9037
		PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
S
Scott Teel 已提交
9038 9039 9040
	if ((rc != 0)  || (c->err_info->CommandStatus != 0))
		goto errout;

D
Dan Carpenter 已提交
9041
	if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
S
Scott Teel 已提交
9042 9043 9044 9045 9046 9047 9048 9049 9050 9051
		goto out;

errout:
	dev_err(&h->pdev->dev,
			"Error: failed to disable report lun data caching.\n");
out:
	cmd_free(h, c);
	kfree(options);
}

9052 9053 9054 9055 9056 9057 9058 9059 9060 9061 9062
static void hpsa_shutdown(struct pci_dev *pdev)
{
	struct ctlr_info *h;

	h = pci_get_drvdata(pdev);
	/* Turn board interrupts off  and send the flush cache command
	 * sendcmd will turn off interrupt, and send the flush...
	 * To write all data in the battery backed cache to disks
	 */
	hpsa_flush_cache(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
R
Robert Elliott 已提交
9063
	hpsa_free_irqs(h);			/* init_one 4 */
9064
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
9065 9066
}

9067
static void hpsa_free_device_info(struct ctlr_info *h)
9068 9069 9070
{
	int i;

R
Robert Elliott 已提交
9071
	for (i = 0; i < h->ndevices; i++) {
9072
		kfree(h->dev[i]);
R
Robert Elliott 已提交
9073 9074
		h->dev[i] = NULL;
	}
9075 9076
}

9077
static void hpsa_remove_one(struct pci_dev *pdev)
9078 9079
{
	struct ctlr_info *h;
9080
	unsigned long flags;
9081 9082

	if (pci_get_drvdata(pdev) == NULL) {
9083
		dev_err(&pdev->dev, "unable to remove device\n");
9084 9085 9086
		return;
	}
	h = pci_get_drvdata(pdev);
9087 9088 9089 9090 9091

	/* Get rid of any controller monitoring work items */
	spin_lock_irqsave(&h->lock, flags);
	h->remove_in_progress = 1;
	spin_unlock_irqrestore(&h->lock, flags);
9092 9093 9094 9095
	cancel_delayed_work_sync(&h->monitor_ctlr_work);
	cancel_delayed_work_sync(&h->rescan_ctlr_work);
	destroy_workqueue(h->rescan_ctlr_wq);
	destroy_workqueue(h->resubmit_wq);
9096

D
Don Brace 已提交
9097 9098 9099 9100 9101 9102 9103 9104
	/*
	 * Call before disabling interrupts.
	 * scsi_remove_host can trigger I/O operations especially
	 * when multipath is enabled. There can be SYNCHRONIZE CACHE
	 * operations which cannot complete and will hang the system.
	 */
	if (h->scsi_host)
		scsi_remove_host(h->scsi_host);		/* init_one 8 */
R
Robert Elliott 已提交
9105
	/* includes hpsa_free_irqs - init_one 4 */
R
Robert Elliott 已提交
9106
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
9107
	hpsa_shutdown(pdev);
9108

R
Robert Elliott 已提交
9109 9110
	hpsa_free_device_info(h);		/* scan */

9111 9112 9113
	kfree(h->hba_inquiry_data);			/* init_one 10 */
	h->hba_inquiry_data = NULL;			/* init_one 10 */
	hpsa_free_ioaccel2_sg_chain_blocks(h);
R
Robert Elliott 已提交
9114 9115 9116
	hpsa_free_performant_mode(h);			/* init_one 7 */
	hpsa_free_sg_chain_blocks(h);			/* init_one 6 */
	hpsa_free_cmd_pool(h);				/* init_one 5 */
9117
	kfree(h->lastlogicals);
R
Robert Elliott 已提交
9118 9119

	/* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
R
Robert Elliott 已提交
9120

9121 9122 9123
	scsi_host_put(h->scsi_host);			/* init_one 3 */
	h->scsi_host = NULL;				/* init_one 3 */

R
Robert Elliott 已提交
9124
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
9125
	hpsa_free_pci_init(h);				/* init_one 2.5 */
R
Robert Elliott 已提交
9126

R
Robert Elliott 已提交
9127 9128 9129
	free_percpu(h->lockup_detected);		/* init_one 2 */
	h->lockup_detected = NULL;			/* init_one 2 */
	/* (void) pci_disable_pcie_error_reporting(pdev); */	/* init_one 1 */
K
Kevin Barnett 已提交
9130 9131 9132

	hpsa_delete_sas_host(h);

R
Robert Elliott 已提交
9133
	kfree(h);					/* init_one 1 */
9134 9135 9136 9137 9138 9139 9140 9141 9142 9143 9144 9145 9146 9147
}

static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
	__attribute__((unused)) pm_message_t state)
{
	return -ENOSYS;
}

static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
{
	return -ENOSYS;
}

static struct pci_driver hpsa_pci_driver = {
9148
	.name = HPSA,
9149
	.probe = hpsa_init_one,
9150
	.remove = hpsa_remove_one,
9151 9152 9153 9154 9155 9156
	.id_table = hpsa_pci_device_id,	/* id_table */
	.shutdown = hpsa_shutdown,
	.suspend = hpsa_suspend,
	.resume = hpsa_resume,
};

9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169
/* Fill in bucket_map[], given nsgs (the max number of
 * scatter gather elements supported) and bucket[],
 * which is an array of 8 integers.  The bucket[] array
 * contains 8 different DMA transfer sizes (in 16
 * byte increments) which the controller uses to fetch
 * commands.  This function fills in bucket_map[], which
 * maps a given number of scatter gather elements to one of
 * the 8 DMA transfer sizes.  The point of it is to allow the
 * controller to only do as much DMA as needed to fetch the
 * command, with the DMA transfer size encoded in the lower
 * bits of the command address.
 */
static void  calc_bucket_map(int bucket[], int num_buckets,
D
Don Brace 已提交
9170
	int nsgs, int min_blocks, u32 *bucket_map)
9171 9172 9173 9174 9175 9176
{
	int i, j, b, size;

	/* Note, bucket_map must have nsgs+1 entries. */
	for (i = 0; i <= nsgs; i++) {
		/* Compute size of a command with i SG entries */
9177
		size = i + min_blocks;
9178 9179
		b = num_buckets; /* Assume the biggest bucket */
		/* Find the bucket that is just big enough */
9180
		for (j = 0; j < num_buckets; j++) {
9181 9182 9183 9184 9185 9186 9187 9188 9189 9190
			if (bucket[j] >= size) {
				b = j;
				break;
			}
		}
		/* for a command with i SG entries, use bucket b. */
		bucket_map[i] = b;
	}
}

R
Robert Elliott 已提交
9191 9192 9193 9194
/*
 * return -ENODEV on err, 0 on success (or no action)
 * allocates numerous items that must be freed later
 */
9195
static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
9196
{
9197 9198
	int i;
	unsigned long register_value;
9199 9200
	unsigned long transMethod = CFGTBL_Trans_Performant |
			(trans_support & CFGTBL_Trans_use_short_tags) |
9201 9202 9203
				CFGTBL_Trans_enable_directed_msix |
			(trans_support & (CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_io_accel2));
9204
	struct access_method access = SA5_performant_access;
9205 9206 9207 9208 9209 9210 9211 9212 9213 9214 9215

	/* This is a bit complicated.  There are 8 registers on
	 * the controller which we write to to tell it 8 different
	 * sizes of commands which there may be.  It's a way of
	 * reducing the DMA done to fetch each command.  Encoded into
	 * each command's tag are 3 bits which communicate to the controller
	 * which of the eight sizes that command fits within.  The size of
	 * each command depends on how many scatter gather entries there are.
	 * Each SG entry requires 16 bytes.  The eight registers are programmed
	 * with the number of 16-byte blocks a command of that size requires.
	 * The smallest command possible requires 5 such 16 byte blocks.
9216
	 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9217 9218 9219 9220 9221 9222
	 * blocks.  Note, this only extends to the SG entries contained
	 * within the command block, and does not extend to chained blocks
	 * of SG elements.   bft[] contains the eight values we write to
	 * the registers.  They are not evenly distributed, but have more
	 * sizes for small commands, and fewer sizes for larger commands.
	 */
9223
	int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9224 9225 9226 9227 9228 9229 9230 9231 9232 9233
#define MIN_IOACCEL2_BFT_ENTRY 5
#define HPSA_IOACCEL2_HEADER_SZ 4
	int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
			13, 14, 15, 16, 17, 18, 19,
			HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
	BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
	BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
	BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
				 16 * MIN_IOACCEL2_BFT_ENTRY);
	BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
9234
	BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9235 9236 9237 9238 9239 9240
	/*  5 = 1 s/g entry or 4k
	 *  6 = 2 s/g entry or 8k
	 *  8 = 4 s/g entry or 16k
	 * 10 = 6 s/g entry or 24k
	 */

9241 9242 9243 9244 9245 9246 9247
	/* If the controller supports either ioaccel method then
	 * we can also use the RAID stack submit path that does not
	 * perform the superfluous readl() after each command submission.
	 */
	if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
		access = SA5_performant_access_no_read;

9248
	/* Controller spec: zero out this buffer. */
9249 9250
	for (i = 0; i < h->nreply_queues; i++)
		memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9251

9252 9253
	bft[7] = SG_ENTRIES_IN_CMD + 4;
	calc_bucket_map(bft, ARRAY_SIZE(bft),
9254
				SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9255 9256 9257 9258 9259
	for (i = 0; i < 8; i++)
		writel(bft[i], &h->transtable->BlockFetch[i]);

	/* size of controller ring buffer */
	writel(h->max_commands, &h->transtable->RepQSize);
9260
	writel(h->nreply_queues, &h->transtable->RepQCount);
9261 9262
	writel(0, &h->transtable->RepQCtrAddrLow32);
	writel(0, &h->transtable->RepQCtrAddrHigh32);
9263 9264 9265

	for (i = 0; i < h->nreply_queues; i++) {
		writel(0, &h->transtable->RepQAddr[i].upper);
9266
		writel(h->reply_queue[i].busaddr,
9267 9268 9269
			&h->transtable->RepQAddr[i].lower);
	}

9270
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9271 9272 9273 9274 9275 9276 9277 9278
	writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
	/*
	 * enable outbound interrupt coalescing in accelerator mode;
	 */
	if (trans_support & CFGTBL_Trans_io_accel1) {
		access = SA5_ioaccel_mode1_access;
		writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
		writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9279 9280 9281 9282 9283 9284
	} else {
		if (trans_support & CFGTBL_Trans_io_accel2) {
			access = SA5_ioaccel_mode2_access;
			writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
			writel(4, &h->cfgtable->HostWrite.CoalIntCount);
		}
9285
	}
9286
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9287 9288 9289 9290 9291
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - doorbell timeout\n");
		return -ENODEV;
	}
9292 9293
	register_value = readl(&(h->cfgtable->TransportActive));
	if (!(register_value & CFGTBL_Trans_Performant)) {
9294 9295
		dev_err(&h->pdev->dev,
			"performant mode problem - transport not active\n");
9296
		return -ENODEV;
9297
	}
9298
	/* Change the access methods to the performant access methods */
9299 9300 9301
	h->access = access;
	h->transMethod = transMethod;

9302 9303
	if (!((trans_support & CFGTBL_Trans_io_accel1) ||
		(trans_support & CFGTBL_Trans_io_accel2)))
9304
		return 0;
9305

9306 9307 9308 9309 9310 9311 9312 9313 9314 9315
	if (trans_support & CFGTBL_Trans_io_accel1) {
		/* Set up I/O accelerator mode */
		for (i = 0; i < h->nreply_queues; i++) {
			writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
			h->reply_queue[i].current_entry =
				readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
		}
		bft[7] = h->ioaccel_maxsg + 8;
		calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
				h->ioaccel1_blockFetchTable);
9316

9317
		/* initialize all reply queue entries to unused */
9318 9319 9320 9321
		for (i = 0; i < h->nreply_queues; i++)
			memset(h->reply_queue[i].head,
				(u8) IOACCEL_MODE1_REPLY_UNUSED,
				h->reply_queue_size);
9322

9323 9324 9325 9326 9327 9328 9329 9330 9331 9332 9333
		/* set all the constant fields in the accelerator command
		 * frames once at init time to save CPU cycles later.
		 */
		for (i = 0; i < h->nr_cmds; i++) {
			struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];

			cp->function = IOACCEL1_FUNCTION_SCSIIO;
			cp->err_info = (u32) (h->errinfo_pool_dhandle +
					(i * sizeof(struct ErrorInfo)));
			cp->err_info_len = sizeof(struct ErrorInfo);
			cp->sgl_offset = IOACCEL1_SGLOFFSET;
D
Don Brace 已提交
9334 9335
			cp->host_context_flags =
				cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9336 9337
			cp->timeout_sec = 0;
			cp->ReplyQueue = 0;
9338
			cp->tag =
9339
				cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9340 9341
			cp->host_addr =
				cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9342 9343 9344 9345 9346 9347 9348 9349 9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363 9364 9365
					(i * sizeof(struct io_accel1_cmd)));
		}
	} else if (trans_support & CFGTBL_Trans_io_accel2) {
		u64 cfg_offset, cfg_base_addr_index;
		u32 bft2_offset, cfg_base_addr;
		int rc;

		rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
			&cfg_base_addr_index, &cfg_offset);
		BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
		bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
		calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
				4, h->ioaccel2_blockFetchTable);
		bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
		BUILD_BUG_ON(offsetof(struct CfgTable,
				io_accel_request_size_offset) != 0xb8);
		h->ioaccel2_bft2_regs =
			remap_pci_mem(pci_resource_start(h->pdev,
					cfg_base_addr_index) +
					cfg_offset + bft2_offset,
					ARRAY_SIZE(bft2) *
					sizeof(*h->ioaccel2_bft2_regs));
		for (i = 0; i < ARRAY_SIZE(bft2); i++)
			writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
9366
	}
9367
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9368 9369 9370 9371 9372 9373
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - enabling ioaccel mode\n");
		return -ENODEV;
	}
	return 0;
9374 9375
}

9376 9377 9378
/* Free ioaccel1 mode command blocks and block fetch table */
static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
{
R
Robert Elliott 已提交
9379
	if (h->ioaccel_cmd_pool) {
9380 9381 9382 9383
		pci_free_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
			h->ioaccel_cmd_pool,
			h->ioaccel_cmd_pool_dhandle);
R
Robert Elliott 已提交
9384 9385 9386
		h->ioaccel_cmd_pool = NULL;
		h->ioaccel_cmd_pool_dhandle = 0;
	}
9387
	kfree(h->ioaccel1_blockFetchTable);
R
Robert Elliott 已提交
9388
	h->ioaccel1_blockFetchTable = NULL;
9389 9390
}

9391 9392
/* Allocate ioaccel1 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9393
{
9394 9395 9396 9397 9398
	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;

9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410
	/* Command structures must be aligned on a 128-byte boundary
	 * because the 7 lower bits of the address are used by the
	 * hardware.
	 */
	BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
			IOACCEL1_COMMANDLIST_ALIGNMENT);
	h->ioaccel_cmd_pool =
		pci_alloc_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
			&(h->ioaccel_cmd_pool_dhandle));

	h->ioaccel1_blockFetchTable =
9411
		kmalloc(((h->ioaccel_maxsg + 1) *
9412 9413 9414 9415 9416 9417 9418 9419 9420 9421 9422
				sizeof(u32)), GFP_KERNEL);

	if ((h->ioaccel_cmd_pool == NULL) ||
		(h->ioaccel1_blockFetchTable == NULL))
		goto clean_up;

	memset(h->ioaccel_cmd_pool, 0,
		h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
	return 0;

clean_up:
9423
	hpsa_free_ioaccel1_cmd_and_bft(h);
9424
	return -ENOMEM;
9425 9426
}

9427 9428 9429
/* Free ioaccel2 mode command blocks and block fetch table */
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
9430 9431
	hpsa_free_ioaccel2_sg_chain_blocks(h);

R
Robert Elliott 已提交
9432
	if (h->ioaccel2_cmd_pool) {
9433 9434 9435 9436
		pci_free_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
			h->ioaccel2_cmd_pool,
			h->ioaccel2_cmd_pool_dhandle);
R
Robert Elliott 已提交
9437 9438 9439
		h->ioaccel2_cmd_pool = NULL;
		h->ioaccel2_cmd_pool_dhandle = 0;
	}
9440
	kfree(h->ioaccel2_blockFetchTable);
R
Robert Elliott 已提交
9441
	h->ioaccel2_blockFetchTable = NULL;
9442 9443
}

9444 9445
/* Allocate ioaccel2 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9446
{
9447 9448
	int rc;

9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467
	/* Allocate ioaccel2 mode command blocks and block fetch table */

	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;

	BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
			IOACCEL2_COMMANDLIST_ALIGNMENT);
	h->ioaccel2_cmd_pool =
		pci_alloc_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
			&(h->ioaccel2_cmd_pool_dhandle));

	h->ioaccel2_blockFetchTable =
		kmalloc(((h->ioaccel_maxsg + 1) *
				sizeof(u32)), GFP_KERNEL);

	if ((h->ioaccel2_cmd_pool == NULL) ||
9468 9469 9470 9471 9472 9473 9474
		(h->ioaccel2_blockFetchTable == NULL)) {
		rc = -ENOMEM;
		goto clean_up;
	}

	rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
	if (rc)
9475 9476 9477 9478 9479 9480 9481
		goto clean_up;

	memset(h->ioaccel2_cmd_pool, 0,
		h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
	return 0;

clean_up:
9482
	hpsa_free_ioaccel2_cmd_and_bft(h);
9483
	return rc;
9484 9485
}

R
Robert Elliott 已提交
9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499
/* Free items allocated by hpsa_put_ctlr_into_performant_mode */
static void hpsa_free_performant_mode(struct ctlr_info *h)
{
	kfree(h->blockFetchTable);
	h->blockFetchTable = NULL;
	hpsa_free_reply_queues(h);
	hpsa_free_ioaccel1_cmd_and_bft(h);
	hpsa_free_ioaccel2_cmd_and_bft(h);
}

/* return -ENODEV on error, 0 on success (or no action)
 * allocates numerous items that must be freed later
 */
static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
9500 9501
{
	u32 trans_support;
9502 9503
	unsigned long transMethod = CFGTBL_Trans_Performant |
					CFGTBL_Trans_use_short_tags;
R
Robert Elliott 已提交
9504
	int i, rc;
9505

9506
	if (hpsa_simple_mode)
R
Robert Elliott 已提交
9507
		return 0;
9508

9509 9510
	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & PERFORMANT_MODE))
R
Robert Elliott 已提交
9511
		return 0;
9512

9513 9514 9515 9516
	/* Check for I/O accelerator mode support */
	if (trans_support & CFGTBL_Trans_io_accel1) {
		transMethod |= CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_enable_directed_msix;
R
Robert Elliott 已提交
9517 9518 9519 9520 9521
		rc = hpsa_alloc_ioaccel1_cmd_and_bft(h);
		if (rc)
			return rc;
	} else if (trans_support & CFGTBL_Trans_io_accel2) {
		transMethod |= CFGTBL_Trans_io_accel2 |
9522
				CFGTBL_Trans_enable_directed_msix;
R
Robert Elliott 已提交
9523 9524 9525
		rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
		if (rc)
			return rc;
9526 9527
	}

9528
	h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
9529
	hpsa_get_max_perf_mode_cmds(h);
9530
	/* Performant mode ring buffer and supporting data structures */
9531
	h->reply_queue_size = h->max_commands * sizeof(u64);
9532

9533
	for (i = 0; i < h->nreply_queues; i++) {
9534 9535 9536
		h->reply_queue[i].head = pci_alloc_consistent(h->pdev,
						h->reply_queue_size,
						&(h->reply_queue[i].busaddr));
R
Robert Elliott 已提交
9537 9538 9539 9540
		if (!h->reply_queue[i].head) {
			rc = -ENOMEM;
			goto clean1;	/* rq, ioaccel */
		}
9541 9542 9543 9544 9545
		h->reply_queue[i].size = h->max_commands;
		h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
		h->reply_queue[i].current_entry = 0;
	}

9546
	/* Need a block fetch table for performant mode */
9547
	h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9548
				sizeof(u32)), GFP_KERNEL);
R
Robert Elliott 已提交
9549 9550 9551 9552
	if (!h->blockFetchTable) {
		rc = -ENOMEM;
		goto clean1;	/* rq, ioaccel */
	}
9553

R
Robert Elliott 已提交
9554 9555 9556 9557
	rc = hpsa_enter_performant_mode(h, trans_support);
	if (rc)
		goto clean2;	/* bft, rq, ioaccel */
	return 0;
9558

R
Robert Elliott 已提交
9559
clean2:	/* bft, rq, ioaccel */
9560
	kfree(h->blockFetchTable);
R
Robert Elliott 已提交
9561 9562 9563 9564 9565 9566
	h->blockFetchTable = NULL;
clean1:	/* rq, ioaccel */
	hpsa_free_reply_queues(h);
	hpsa_free_ioaccel1_cmd_and_bft(h);
	hpsa_free_ioaccel2_cmd_and_bft(h);
	return rc;
9567 9568
}

9569
static int is_accelerated_cmd(struct CommandList *c)
9570
{
9571 9572 9573 9574 9575 9576
	return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
}

static void hpsa_drain_accel_commands(struct ctlr_info *h)
{
	struct CommandList *c = NULL;
9577
	int i, accel_cmds_out;
9578
	int refcount;
9579

9580
	do { /* wait for all outstanding ioaccel commands to drain out */
9581
		accel_cmds_out = 0;
9582 9583
		for (i = 0; i < h->nr_cmds; i++) {
			c = h->cmd_pool + i;
9584 9585 9586 9587
			refcount = atomic_inc_return(&c->refcount);
			if (refcount > 1) /* Command is allocated */
				accel_cmds_out += is_accelerated_cmd(c);
			cmd_free(h, c);
9588
		}
9589
		if (accel_cmds_out <= 0)
9590
			break;
9591 9592 9593 9594
		msleep(100);
	} while (1);
}

K
Kevin Barnett 已提交
9595 9596 9597 9598 9599 9600 9601 9602 9603 9604 9605 9606 9607 9608 9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619 9620 9621 9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639 9640 9641 9642 9643 9644 9645 9646 9647 9648 9649 9650 9651 9652 9653 9654 9655 9656 9657 9658 9659 9660 9661 9662 9663 9664 9665 9666 9667 9668 9669 9670 9671 9672 9673 9674 9675 9676 9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689 9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716 9717 9718 9719 9720 9721 9722 9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735 9736 9737 9738 9739 9740 9741 9742 9743 9744 9745 9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767 9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789 9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831 9832 9833 9834 9835 9836 9837 9838 9839 9840 9841 9842 9843 9844 9845 9846 9847 9848 9849 9850 9851 9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870 9871 9872 9873 9874
static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
				struct hpsa_sas_port *hpsa_sas_port)
{
	struct hpsa_sas_phy *hpsa_sas_phy;
	struct sas_phy *phy;

	hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
	if (!hpsa_sas_phy)
		return NULL;

	phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
		hpsa_sas_port->next_phy_index);
	if (!phy) {
		kfree(hpsa_sas_phy);
		return NULL;
	}

	hpsa_sas_port->next_phy_index++;
	hpsa_sas_phy->phy = phy;
	hpsa_sas_phy->parent_port = hpsa_sas_port;

	return hpsa_sas_phy;
}

static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
{
	struct sas_phy *phy = hpsa_sas_phy->phy;

	sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
	sas_phy_free(phy);
	if (hpsa_sas_phy->added_to_port)
		list_del(&hpsa_sas_phy->phy_list_entry);
	kfree(hpsa_sas_phy);
}

static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_phy *phy;
	struct sas_identify *identify;

	hpsa_sas_port = hpsa_sas_phy->parent_port;
	phy = hpsa_sas_phy->phy;

	identify = &phy->identify;
	memset(identify, 0, sizeof(*identify));
	identify->sas_address = hpsa_sas_port->sas_address;
	identify->device_type = SAS_END_DEVICE;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;
	phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;

	rc = sas_phy_add(hpsa_sas_phy->phy);
	if (rc)
		return rc;

	sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
	list_add_tail(&hpsa_sas_phy->phy_list_entry,
			&hpsa_sas_port->phy_list_head);
	hpsa_sas_phy->added_to_port = true;

	return 0;
}

static int
	hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
				struct sas_rphy *rphy)
{
	struct sas_identify *identify;

	identify = &rphy->identify;
	identify->sas_address = hpsa_sas_port->sas_address;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;

	return sas_rphy_add(rphy);
}

static struct hpsa_sas_port
	*hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
				u64 sas_address)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_port *port;

	hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
	if (!hpsa_sas_port)
		return NULL;

	INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
	hpsa_sas_port->parent_node = hpsa_sas_node;

	port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
	if (!port)
		goto free_hpsa_port;

	rc = sas_port_add(port);
	if (rc)
		goto free_sas_port;

	hpsa_sas_port->port = port;
	hpsa_sas_port->sas_address = sas_address;
	list_add_tail(&hpsa_sas_port->port_list_entry,
			&hpsa_sas_node->port_list_head);

	return hpsa_sas_port;

free_sas_port:
	sas_port_free(port);
free_hpsa_port:
	kfree(hpsa_sas_port);

	return NULL;
}

static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
{
	struct hpsa_sas_phy *hpsa_sas_phy;
	struct hpsa_sas_phy *next;

	list_for_each_entry_safe(hpsa_sas_phy, next,
			&hpsa_sas_port->phy_list_head, phy_list_entry)
		hpsa_free_sas_phy(hpsa_sas_phy);

	sas_port_delete(hpsa_sas_port->port);
	list_del(&hpsa_sas_port->port_list_entry);
	kfree(hpsa_sas_port);
}

static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
{
	struct hpsa_sas_node *hpsa_sas_node;

	hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
	if (hpsa_sas_node) {
		hpsa_sas_node->parent_dev = parent_dev;
		INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
	}

	return hpsa_sas_node;
}

static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
{
	struct hpsa_sas_port *hpsa_sas_port;
	struct hpsa_sas_port *next;

	if (!hpsa_sas_node)
		return;

	list_for_each_entry_safe(hpsa_sas_port, next,
			&hpsa_sas_node->port_list_head, port_list_entry)
		hpsa_free_sas_port(hpsa_sas_port);

	kfree(hpsa_sas_node);
}

static struct hpsa_scsi_dev_t
	*hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
					struct sas_rphy *rphy)
{
	int i;
	struct hpsa_scsi_dev_t *device;

	for (i = 0; i < h->ndevices; i++) {
		device = h->dev[i];
		if (!device->sas_port)
			continue;
		if (device->sas_port->rphy == rphy)
			return device;
	}

	return NULL;
}

static int hpsa_add_sas_host(struct ctlr_info *h)
{
	int rc;
	struct device *parent_dev;
	struct hpsa_sas_node *hpsa_sas_node;
	struct hpsa_sas_port *hpsa_sas_port;
	struct hpsa_sas_phy *hpsa_sas_phy;

	parent_dev = &h->scsi_host->shost_gendev;

	hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
	if (!hpsa_sas_node)
		return -ENOMEM;

	hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
	if (!hpsa_sas_port) {
		rc = -ENODEV;
		goto free_sas_node;
	}

	hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
	if (!hpsa_sas_phy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
	if (rc)
		goto free_sas_phy;

	h->sas_host = hpsa_sas_node;

	return 0;

free_sas_phy:
	hpsa_free_sas_phy(hpsa_sas_phy);
free_sas_port:
	hpsa_free_sas_port(hpsa_sas_port);
free_sas_node:
	hpsa_free_sas_node(hpsa_sas_node);

	return rc;
}

static void hpsa_delete_sas_host(struct ctlr_info *h)
{
	hpsa_free_sas_node(h->sas_host);
}

static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
				struct hpsa_scsi_dev_t *device)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_rphy *rphy;

	hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
	if (!hpsa_sas_port)
		return -ENOMEM;

	rphy = sas_end_device_alloc(hpsa_sas_port->port);
	if (!rphy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	hpsa_sas_port->rphy = rphy;
	device->sas_port = hpsa_sas_port;

	rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
	if (rc)
		goto free_sas_port;

	return 0;

free_sas_port:
	hpsa_free_sas_port(hpsa_sas_port);
	device->sas_port = NULL;

	return rc;
}

static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
{
	if (device->sas_port) {
		hpsa_free_sas_port(device->sas_port);
		device->sas_port = NULL;
	}
}

static int
hpsa_sas_get_linkerrors(struct sas_phy *phy)
{
	return 0;
}

static int
hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
{
9875
	*identifier = 0;
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Kevin Barnett 已提交
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	return 0;
}

static int
hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
{
	return -ENXIO;
}

static int
hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
{
	return 0;
}

static int
hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
{
	return 0;
}

static int
hpsa_sas_phy_setup(struct sas_phy *phy)
{
	return 0;
}

static void
hpsa_sas_phy_release(struct sas_phy *phy)
{
}

static int
hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
{
	return -EINVAL;
}

/* SMP = Serial Management Protocol */
static int
hpsa_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
struct request *req)
{
	return -EINVAL;
}

static struct sas_function_template hpsa_sas_transport_functions = {
	.get_linkerrors = hpsa_sas_get_linkerrors,
	.get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
	.get_bay_identifier = hpsa_sas_get_bay_identifier,
	.phy_reset = hpsa_sas_phy_reset,
	.phy_enable = hpsa_sas_phy_enable,
	.phy_setup = hpsa_sas_phy_setup,
	.phy_release = hpsa_sas_phy_release,
	.set_phy_speed = hpsa_sas_phy_speed,
	.smp_handler = hpsa_sas_smp_handler,
};

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/*
 *  This is it.  Register the PCI driver information for the cards we control
 *  the OS will call our registered routines when it finds one of our cards.
 */
static int __init hpsa_init(void)
{
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Kevin Barnett 已提交
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	int rc;

	hpsa_sas_transport_template =
		sas_attach_transport(&hpsa_sas_transport_functions);
	if (!hpsa_sas_transport_template)
		return -ENODEV;

	rc = pci_register_driver(&hpsa_pci_driver);

	if (rc)
		sas_release_transport(hpsa_sas_transport_template);

	return rc;
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}

static void __exit hpsa_cleanup(void)
{
	pci_unregister_driver(&hpsa_pci_driver);
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Kevin Barnett 已提交
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	sas_release_transport(hpsa_sas_transport_template);
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}

9961 9962
static void __attribute__((unused)) verify_offsets(void)
{
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#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)

	VERIFY_OFFSET(structure_size, 0);
	VERIFY_OFFSET(volume_blk_size, 4);
	VERIFY_OFFSET(volume_blk_cnt, 8);
	VERIFY_OFFSET(phys_blk_shift, 16);
	VERIFY_OFFSET(parity_rotation_shift, 17);
	VERIFY_OFFSET(strip_size, 18);
	VERIFY_OFFSET(disk_starting_blk, 20);
	VERIFY_OFFSET(disk_blk_cnt, 28);
	VERIFY_OFFSET(data_disks_per_row, 36);
	VERIFY_OFFSET(metadata_disks_per_row, 38);
	VERIFY_OFFSET(row_cnt, 40);
	VERIFY_OFFSET(layout_map_count, 42);
	VERIFY_OFFSET(flags, 44);
	VERIFY_OFFSET(dekindex, 46);
	/* VERIFY_OFFSET(reserved, 48 */
	VERIFY_OFFSET(data, 64);

#undef VERIFY_OFFSET

9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000 10001 10002 10003 10004 10005 10006
#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)

	VERIFY_OFFSET(IU_type, 0);
	VERIFY_OFFSET(direction, 1);
	VERIFY_OFFSET(reply_queue, 2);
	/* VERIFY_OFFSET(reserved1, 3);  */
	VERIFY_OFFSET(scsi_nexus, 4);
	VERIFY_OFFSET(Tag, 8);
	VERIFY_OFFSET(cdb, 16);
	VERIFY_OFFSET(cciss_lun, 32);
	VERIFY_OFFSET(data_len, 40);
	VERIFY_OFFSET(cmd_priority_task_attr, 44);
	VERIFY_OFFSET(sg_count, 45);
	/* VERIFY_OFFSET(reserved3 */
	VERIFY_OFFSET(err_ptr, 48);
	VERIFY_OFFSET(err_len, 56);
	/* VERIFY_OFFSET(reserved4  */
	VERIFY_OFFSET(sg, 64);

#undef VERIFY_OFFSET

10007 10008 10009 10010 10011 10012 10013 10014 10015 10016 10017 10018 10019 10020 10021 10022 10023 10024 10025 10026 10027 10028 10029 10030 10031
#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)

	VERIFY_OFFSET(dev_handle, 0x00);
	VERIFY_OFFSET(reserved1, 0x02);
	VERIFY_OFFSET(function, 0x03);
	VERIFY_OFFSET(reserved2, 0x04);
	VERIFY_OFFSET(err_info, 0x0C);
	VERIFY_OFFSET(reserved3, 0x10);
	VERIFY_OFFSET(err_info_len, 0x12);
	VERIFY_OFFSET(reserved4, 0x13);
	VERIFY_OFFSET(sgl_offset, 0x14);
	VERIFY_OFFSET(reserved5, 0x15);
	VERIFY_OFFSET(transfer_len, 0x1C);
	VERIFY_OFFSET(reserved6, 0x20);
	VERIFY_OFFSET(io_flags, 0x24);
	VERIFY_OFFSET(reserved7, 0x26);
	VERIFY_OFFSET(LUN, 0x34);
	VERIFY_OFFSET(control, 0x3C);
	VERIFY_OFFSET(CDB, 0x40);
	VERIFY_OFFSET(reserved8, 0x50);
	VERIFY_OFFSET(host_context_flags, 0x60);
	VERIFY_OFFSET(timeout_sec, 0x62);
	VERIFY_OFFSET(ReplyQueue, 0x64);
	VERIFY_OFFSET(reserved9, 0x65);
10032
	VERIFY_OFFSET(tag, 0x68);
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	VERIFY_OFFSET(host_addr, 0x70);
	VERIFY_OFFSET(CISS_LUN, 0x78);
	VERIFY_OFFSET(SG, 0x78 + 8);
#undef VERIFY_OFFSET
}

10039 10040
module_init(hpsa_init);
module_exit(hpsa_cleanup);