hpsa.c 254.9 KB
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/*
 *    Disk Array driver for HP Smart Array SAS controllers
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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 storagedev@pmcs.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_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"

/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
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#define HPSA_DRIVER_VERSION "3.4.10-0"
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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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#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);
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 int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device);
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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:
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		dev_warn(&h->pdev->dev,
			"%s: unit attention cleared by another initiator\n",
			h->devname);
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		break;
	default:
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		dev_warn(&h->pdev->dev,
			"%s: unknown unit attention detected\n",
			h->devname);
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		break;
	}
	return 1;
}

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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;
}

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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);
}

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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;
}

425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449
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;
}

450 451 452 453 454 455
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);
456
	h = shost_to_hba(shost);
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	hpsa_scan_start(h->scsi_host);
458 459 460
	return count;
}

461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
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]);
}

476 477 478 479 480 481
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);

482 483
	return snprintf(buf, 20, "%d\n",
			atomic_read(&h->commands_outstanding));
484 485
}

486 487 488 489 490 491 492 493
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",
494
		h->transMethod & CFGTBL_Trans_Performant ?
495 496 497
			"performant" : "simple");
}

498 499 500 501 502 503 504 505 506 507 508
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");
}

509
/* List of controllers which cannot be hard reset on kexec with reset_devices */
510 511
static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
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	0x324b103C, /* Smart Array P711m */
513 514 515 516 517 518 519 520 521 522
	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 */
523
	0x40800E11, /* Smart Array 5i */
524 525
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
526 527 528 529 530 531
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
532 533
};

534 535
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
536
	0x40800E11, /* Smart Array 5i */
537 538 539 540 541 542
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
543 544 545 546 547 548 549 550 551 552 553
	/* 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)
561 562 563
{
	int i;

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	for (i = 0; i < nelems; i++)
		if (a[i] == board_id)
			return 1;
	return 0;
568 569
}

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static int ctlr_is_hard_resettable(u32 board_id)
571
{
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	return !board_id_in_array(unresettable_controller,
			ARRAY_SIZE(unresettable_controller), board_id);
}
575

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static int ctlr_is_soft_resettable(u32 board_id)
{
	return !board_id_in_array(soft_unresettable_controller,
			ARRAY_SIZE(soft_unresettable_controller), board_id);
580 581
}

582 583 584 585 586 587
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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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);
}

594 595 596 597 598 599 600
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);
601
	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
602 603
}

604 605 606 607 608
static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
{
	return (scsi3addr[3] & 0xC0) == 0x40;
}

609 610
static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
	"1(+0)ADM", "UNKNOWN"
611
};
612 613 614 615 616 617 618
#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 */
619 620
#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)

621 622 623 624 625
static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
{
	return !device->physical_device;
}

626 627 628 629
static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
630
	unsigned char rlevel;
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645
	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? */
646
	if (!is_logical_device(hdev)) {
647 648 649 650 651 652 653
		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);
654
	if (rlevel > RAID_UNKNOWN)
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
		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);
	return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		lunid[0], lunid[1], lunid[2], lunid[3],
		lunid[4], lunid[5], lunid[6], lunid[7]);
}

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]);
}

712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733
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);
}

734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
#define MAX_PATHS 8
#define PATH_STRING_LEN 50

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];
	unsigned char path[MAX_PATHS][PATH_STRING_LEN];

	memset(path, 0, MAX_PATHS * PATH_STRING_LEN);
	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;

		output_len = snprintf(path[i],
				PATH_STRING_LEN, "[%d:%d:%d:%d] %20.20s ",
				h->scsi_host->host_no,
				hdev->bus, hdev->target, hdev->lun,
				scsi_device_type(hdev->devtype));

		if (is_ext_target(h, hdev) ||
780 781
			hdev->devtype == TYPE_RAID ||
			is_logical_device(hdev)) {
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799
			output_len += snprintf(path[i] + output_len,
						PATH_STRING_LEN, "%s\n",
						active);
			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';
		if (hdev->phys_connector[i] > 0)
			output_len += snprintf(path[i] + output_len,
				PATH_STRING_LEN,
				"PORT: %.2s ",
				phys_connector);
800
		if (hdev->devtype == TYPE_DISK && hdev->expose_device) {
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
			if (box == 0 || box == 0xFF) {
				output_len += snprintf(path[i] + output_len,
					PATH_STRING_LEN,
					"BAY: %hhu %s\n",
					bay, active);
			} else {
				output_len += snprintf(path[i] + output_len,
					PATH_STRING_LEN,
					"BOX: %hhu BAY: %hhu %s\n",
					box, bay, active);
			}
		} else if (box != 0 && box != 0xFF) {
			output_len += snprintf(path[i] + output_len,
				PATH_STRING_LEN, "BOX: %hhu %s\n",
				box, active);
		} else
			output_len += snprintf(path[i] + output_len,
				PATH_STRING_LEN, "%s\n", active);
	}

	spin_unlock_irqrestore(&h->devlock, flags);
	return snprintf(buf, output_len+1, "%s%s%s%s%s%s%s%s",
		path[0], path[1], path[2], path[3],
		path[4], path[5], path[6], path[7]);
}

827 828 829 830
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);
831 832
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
			host_show_hp_ssd_smart_path_enabled, NULL);
833
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
834 835 836
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);
837 838
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
			host_store_raid_offload_debug);
839 840 841 842 843 844
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);
845 846
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
847 848
static DEVICE_ATTR(lockup_detected, S_IRUGO,
	host_show_lockup_detected, NULL);
849 850 851 852 853

static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
854
	&dev_attr_hp_ssd_smart_path_enabled,
855
	&dev_attr_path_info,
856
	&dev_attr_lockup_detected,
857 858 859 860 861 862 863 864
	NULL,
};

static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
865
	&dev_attr_resettable,
866
	&dev_attr_hp_ssd_smart_path_status,
867
	&dev_attr_raid_offload_debug,
868 869 870
	NULL,
};

871 872 873
#define HPSA_NRESERVED_CMDS	(HPSA_CMDS_RESERVED_FOR_ABORTS + \
		HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)

874 875
static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
876 877
	.name			= HPSA,
	.proc_name		= HPSA,
878 879 880
	.queuecommand		= hpsa_scsi_queue_command,
	.scan_start		= hpsa_scan_start,
	.scan_finished		= hpsa_scan_finished,
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	.change_queue_depth	= hpsa_change_queue_depth,
882 883
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
884
	.eh_abort_handler	= hpsa_eh_abort_handler,
885 886 887
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
888
	.slave_configure	= hpsa_slave_configure,
889 890 891 892 893 894
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
895
	.max_sectors = 8192,
896
	.no_write_same = 1,
897 898
};

899
static inline u32 next_command(struct ctlr_info *h, u8 q)
900 901
{
	u32 a;
902
	struct reply_queue_buffer *rq = &h->reply_queue[q];
903

904 905 906
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return h->access.command_completed(h, q);

907
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
908
		return h->access.command_completed(h, q);
909

910 911 912
	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
913
		atomic_dec(&h->commands_outstanding);
914 915 916 917
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
918 919 920
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
921 922 923 924
	}
	return a;
}

925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950
/*
 * 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.
 */

951 952
/*
 * set_performant_mode: Modify the tag for cciss performant
953 954 955
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */
956 957 958
#define DEFAULT_REPLY_QUEUE (-1)
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
					int reply_queue)
959
{
960
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
961
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
962 963 964
		if (unlikely(!h->msix_vector))
			return;
		if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
965
			c->Header.ReplyQueue =
966
				raw_smp_processor_id() % h->nreply_queues;
967 968
		else
			c->Header.ReplyQueue = reply_queue % h->nreply_queues;
969
	}
970 971
}

972
static void set_ioaccel1_performant_mode(struct ctlr_info *h,
973 974
						struct CommandList *c,
						int reply_queue)
975 976 977
{
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];

978 979
	/*
	 * Tell the controller to post the reply to the queue for this
980 981
	 * processor.  This seems to give the best I/O throughput.
	 */
982 983 984 985 986 987
	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:
988 989 990 991 992 993 994 995
	 *  - 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;
}

996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017
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];
}

1018
static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1019 1020
						struct CommandList *c,
						int reply_queue)
1021 1022 1023
{
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];

1024 1025
	/*
	 * Tell the controller to post the reply to the queue for this
1026 1027
	 * processor.  This seems to give the best I/O throughput.
	 */
1028 1029 1030 1031 1032 1033
	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:
1034 1035 1036 1037 1038 1039 1040
	 *  - 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]);
}

1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
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;
}

1070 1071
static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c, int reply_queue)
1072
{
1073 1074
	dial_down_lockup_detection_during_fw_flash(h, c);
	atomic_inc(&h->commands_outstanding);
1075 1076
	switch (c->cmd_type) {
	case CMD_IOACCEL1:
1077
		set_ioaccel1_performant_mode(h, c, reply_queue);
1078
		writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1079 1080
		break;
	case CMD_IOACCEL2:
1081
		set_ioaccel2_performant_mode(h, c, reply_queue);
1082
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1083
		break;
1084 1085 1086 1087
	case IOACCEL2_TMF:
		set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
		break;
1088
	default:
1089
		set_performant_mode(h, c, reply_queue);
1090
		h->access.submit_command(h, c);
1091
	}
1092 1093
}

1094
static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1095
{
W
Webb Scales 已提交
1096
	if (unlikely(hpsa_is_pending_event(c)))
1097 1098
		return finish_cmd(c);

1099 1100 1101
	__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}

1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
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;
}

1116 1117 1118 1119 1120 1121 1122
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;
1123
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1124

1125
	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1126 1127 1128

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1129
			__set_bit(h->dev[i]->target, lun_taken);
1130 1131
	}

1132 1133 1134 1135 1136 1137
	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
1138 1139 1140 1141
	}
	return !found;
}

D
Don Brace 已提交
1142
static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1143 1144
	struct hpsa_scsi_dev_t *dev, char *description)
{
1145 1146 1147
	if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
		return;

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
	dev_printk(level, &h->pdev->dev,
			"scsi %d:%d:%d:%d: %s %s %.8s %.16s RAID-%s SSDSmartPathCap%c En%c Exp=%d\n",
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
			description,
			scsi_device_type(dev->devtype),
			dev->vendor,
			dev->model,
			dev->raid_level > RAID_UNKNOWN ?
				"RAID-?" : raid_label[dev->raid_level],
			dev->offload_config ? '+' : '-',
			dev->offload_enabled ? '+' : '-',
1159
			dev->expose_device);
1160 1161
}

1162
/* Add an entry into h->dev[] array. */
D
Don Brace 已提交
1163
static int hpsa_scsi_add_entry(struct ctlr_info *h,
1164 1165 1166 1167 1168 1169 1170 1171 1172
		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;

1173
	if (n >= HPSA_MAX_DEVICES) {
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
		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
Don Brace 已提交
1186
	 * unit no, zero otherwise.
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197
	 */
	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
1198
	 * has the same 8 byte LUN address, excepting byte 4 and 5.
1199 1200 1201 1202 1203
	 * 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;
1204
	addr1[5] = 0;
1205 1206 1207 1208
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
1209 1210
		addr2[5] = 0;
		/* differ only in byte 4 and 5? */
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
		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)++;
1231
	hpsa_show_dev_msg(KERN_INFO, h, device,
1232
		device->expose_device ? "added" : "masked");
1233 1234
	device->offload_to_be_enabled = device->offload_enabled;
	device->offload_enabled = 0;
1235 1236 1237
	return 0;
}

1238
/* Update an entry in h->dev[] array. */
D
Don Brace 已提交
1239
static void hpsa_scsi_update_entry(struct ctlr_info *h,
1240 1241
	int entry, struct hpsa_scsi_dev_t *new_entry)
{
1242
	int offload_enabled;
1243 1244 1245 1246 1247
	/* 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;
1248

1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
	/* 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;
	}
1262 1263 1264 1265 1266
	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;
1267
	h->dev[entry]->offload_config = new_entry->offload_config;
1268
	h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1269
	h->dev[entry]->queue_depth = new_entry->queue_depth;
1270

1271 1272 1273 1274 1275 1276 1277 1278 1279
	/*
	 * 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;

1280 1281
	offload_enabled = h->dev[entry]->offload_enabled;
	h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
1282
	hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1283
	h->dev[entry]->offload_enabled = offload_enabled;
1284 1285
}

1286
/* Replace an entry from h->dev[] array. */
D
Don Brace 已提交
1287
static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1288 1289 1290 1291 1292
	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 */
1293
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1294 1295
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;
1296 1297 1298 1299 1300 1301 1302 1303 1304 1305

	/*
	 * 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;
	}

1306 1307 1308
	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
1309
	hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1310 1311
	new_entry->offload_to_be_enabled = new_entry->offload_enabled;
	new_entry->offload_enabled = 0;
1312 1313
}

1314
/* Remove an entry from h->dev[] array. */
D
Don Brace 已提交
1315
static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1316 1317 1318 1319 1320 1321
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

1322
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1323 1324 1325 1326 1327 1328 1329 1330

	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--;
1331
	hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
}

#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;
}

1390 1391 1392 1393 1394 1395 1396 1397 1398
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;
1399 1400 1401 1402
	if (dev1->offload_config != dev2->offload_config)
		return 1;
	if (dev1->offload_enabled != dev2->offload_enabled)
		return 1;
D
Don Brace 已提交
1403 1404 1405
	if (!is_logical_dev_addr_mode(dev1->scsi3addr))
		if (dev1->queue_depth != dev2->queue_depth)
			return 1;
1406 1407 1408
	return 0;
}

1409 1410 1411
/* 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
1412 1413 1414 1415
 * 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.
1416 1417 1418 1419 1420 1421 1422 1423 1424
 */
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
1425
#define DEVICE_UPDATED 3
D
Don Brace 已提交
1426 1427 1428
	if (needle == NULL)
		return DEVICE_NOT_FOUND;

1429
	for (i = 0; i < haystack_size; i++) {
1430 1431
		if (haystack[i] == NULL) /* previously removed. */
			continue;
1432 1433
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
1434 1435 1436
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
1437
				return DEVICE_SAME;
1438
			} else {
1439 1440 1441
				/* Keep offline devices offline */
				if (needle->volume_offline)
					return DEVICE_NOT_FOUND;
1442
				return DEVICE_CHANGED;
1443
			}
1444 1445 1446 1447 1448 1449
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}

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 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
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
1497 1498 1499 1500 1501 1502
	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;
1503 1504
	case HPSA_LV_UNDERGOING_RPI:
		dev_info(&h->pdev->dev,
S
Scott Benesh 已提交
1505
			"C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1506 1507 1508 1509 1510
			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
1511 1512 1513
			"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);
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559
		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;
	}
}

1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
/*
 * 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
1583 1584
	logical_drive->nphysical_disks = nraid_map_entries;

1585 1586 1587 1588 1589 1590
	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
1591 1592
			if (dev[j] == NULL)
				continue;
1593 1594
			if (dev[j]->devtype != TYPE_DISK)
				continue;
1595
			if (is_logical_device(dev[j]))
1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615
				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;
1616 1617
			logical_drive->offload_to_be_enabled = 0;
			logical_drive->queue_depth = 8;
1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635
		}
	}
	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
1636 1637
		if (dev[i] == NULL)
			continue;
1638 1639
		if (dev[i]->devtype != TYPE_DISK)
			continue;
1640
		if (!is_logical_device(dev[i]))
1641
			continue;
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651

		/*
		 * 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;

1652 1653 1654 1655
		hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
	}
}

1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692
static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
	int rc = 0;

	if (!h->scsi_host)
		return 1;

	rc = scsi_add_device(h->scsi_host, device->bus,
					device->target, device->lun);
	return rc;
}

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;

	sdev = scsi_device_lookup(h->scsi_host, device->bus,
						device->target, device->lun);

	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,
					"didn't find device for removal.");
	}
}

D
Don Brace 已提交
1693
static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705
	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
1706 1707 1708 1709 1710 1711 1712 1713 1714
	/*
	 * 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;
	}

1715 1716
	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729

	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.
1730 1731
	 * If minor device attributes change, just update
	 * the existing device structure.
1732 1733 1734 1735 1736 1737 1738 1739 1740
	 */
	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
1741
			hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1742 1743 1744
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
D
Don Brace 已提交
1745
			hpsa_scsi_replace_entry(h, i, sd[entry],
1746
				added, &nadded, removed, &nremoved);
1747 1748 1749 1750
			/* Set it to NULL to prevent it from being freed
			 * at the bottom of hpsa_update_scsi_devices()
			 */
			sd[entry] = NULL;
1751
		} else if (device_change == DEVICE_UPDATED) {
D
Don Brace 已提交
1752
			hpsa_scsi_update_entry(h, i, sd[entry]);
1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
		}
		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;
1764 1765 1766 1767 1768 1769 1770 1771

		/* 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]);
1772
			hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1773 1774 1775
			continue;
		}

1776 1777 1778 1779
		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
1780
			if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
				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 */
		}
	}
1791 1792 1793 1794 1795
	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
1796 1797 1798
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == NULL)
			continue;
1799
		h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
D
Don Brace 已提交
1800
	}
1801

1802 1803
	spin_unlock_irqrestore(&h->devlock, flags);

1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
	/* 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);
	}

1815 1816 1817 1818
	/* 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
1819
	if (!changes)
1820 1821 1822 1823
		goto free_and_out;

	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
D
Don Brace 已提交
1824 1825
		if (removed[i] == NULL)
			continue;
1826 1827
		if (removed[i]->expose_device)
			hpsa_remove_device(h, removed[i]);
1828 1829 1830 1831 1832 1833
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
1834 1835
		int rc = 0;

D
Don Brace 已提交
1836 1837
		if (added[i] == NULL)
			continue;
1838
		if (!(added[i]->expose_device))
1839
			continue;
1840 1841
		rc = hpsa_add_device(h, added[i]);
		if (!rc)
1842
			continue;
1843 1844
		dev_warn(&h->pdev->dev,
			"addition failed %d, device not added.", rc);
1845 1846 1847 1848
		/* 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
1849
		h->drv_req_rescan = 1;
1850 1851 1852 1853 1854 1855 1856 1857
	}

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

/*
1858
 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884
 * 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)
{
	struct hpsa_scsi_dev_t *sd;
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
		sdev_id(sdev), sdev->lun);
1885
	if (likely(sd)) {
1886
		atomic_set(&sd->ioaccel_cmds_out, 0);
1887
		sdev->hostdata = sd->expose_device ? sd : NULL;
1888 1889
	} else
		sdev->hostdata = NULL;
1890 1891 1892 1893
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}

1894 1895 1896 1897 1898 1899 1900
/* 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;
1901
	sdev->no_uld_attach = !sd || !sd->expose_device;
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913

	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;
}

1914 1915
static void hpsa_slave_destroy(struct scsi_device *sdev)
{
1916
	/* nothing to do. */
1917 1918
}

1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958
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;
}

1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
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
1973
static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
1974 1975 1976 1977 1978 1979 1980 1981
{
	int i;

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

	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
				GFP_KERNEL);
1982 1983
	if (!h->cmd_sg_list) {
		dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
1984
		return -ENOMEM;
1985
	}
1986 1987 1988
	for (i = 0; i < h->nr_cmds; i++) {
		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
						h->chainsize, GFP_KERNEL);
1989 1990
		if (!h->cmd_sg_list[i]) {
			dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
1991
			goto clean;
1992
		}
1993 1994 1995 1996 1997 1998 1999 2000
	}
	return 0;

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

2001 2002 2003 2004 2005 2006 2007 2008
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
2009
	chain_size = le32_to_cpu(cp->sg[0].length);
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029
	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
2030
	chain_size = le32_to_cpu(cp->sg[0].length);
2031 2032 2033
	pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}

2034
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2035 2036 2037 2038
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;
2039
	u32 chain_len;
2040 2041 2042

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
2043 2044
	chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
	chain_len = sizeof(*chain_sg) *
D
Don Brace 已提交
2045
		(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2046 2047
	chain_sg->Len = cpu_to_le32(chain_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_len,
2048
				PCI_DMA_TODEVICE);
2049 2050
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
2051
		chain_sg->Addr = cpu_to_le64(0);
2052 2053
		return -1;
	}
2054
	chain_sg->Addr = cpu_to_le64(temp64);
2055
	return 0;
2056 2057 2058 2059 2060 2061 2062
}

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

2063
	if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2064 2065 2066
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2067 2068
	pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
			le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
2069 2070
}

2071 2072 2073 2074 2075 2076

/* 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,
2077 2078 2079 2080 2081
					struct CommandList *c,
					struct scsi_cmnd *cmd,
					struct io_accel2_cmd *c2)
{
	int data_len;
2082
	int retry = 0;
2083
	u32 ioaccel2_resid = 0;
2084 2085 2086 2087 2088 2089 2090

	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:
2091
			cmd->result |= SAM_STAT_CHECK_CONDITION;
2092
			if (c2->error_data.data_present !=
2093 2094 2095
					IOACCEL2_SENSE_DATA_PRESENT) {
				memset(cmd->sense_buffer, 0,
					SCSI_SENSE_BUFFERSIZE);
2096
				break;
2097
			}
2098 2099 2100 2101 2102 2103 2104 2105 2106
			/* 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);
2107
			retry = 1;
2108 2109
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2110
			retry = 1;
2111 2112
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2113
			retry = 1;
2114 2115
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2116
			retry = 1;
2117 2118
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2119
			retry = 1;
2120 2121
			break;
		default:
2122
			retry = 1;
2123 2124 2125 2126
			break;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_FAILURE:
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148
		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:
			/* We will get an event from ctlr to trigger rescan */
			retry = 1;
			break;
		default:
			retry = 1;
		}
2149 2150 2151 2152 2153 2154
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2155
		retry = 1;
2156 2157 2158 2159
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		break;
	default:
2160
		retry = 1;
2161 2162
		break;
	}
2163 2164

	return retry;	/* retry on raid path? */
2165 2166
}

2167 2168 2169
static void hpsa_cmd_resolve_events(struct ctlr_info *h,
		struct CommandList *c)
{
W
Webb Scales 已提交
2170 2171
	bool do_wake = false;

2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182
	/*
	 * 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
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2183 2184
	 * 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
2185 2186 2187
	 * waiting for this command, and, if so, wake it.
	 */
	c->scsi_cmd = SCSI_CMD_IDLE;
W
Webb Scales 已提交
2188
	mb();	/* Declare command idle before checking for pending events. */
2189
	if (c->abort_pending) {
W
Webb Scales 已提交
2190
		do_wake = true;
2191 2192
		c->abort_pending = false;
	}
W
Webb Scales 已提交
2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
	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);
2212 2213
}

2214 2215 2216 2217 2218 2219 2220
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);
}

2221 2222 2223
static void hpsa_cmd_free_and_done(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd)
{
2224
	hpsa_cmd_resolve_and_free(h, c);
2225 2226 2227 2228 2229 2230 2231 2232 2233
	cmd->scsi_done(cmd);
}

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);
}

2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
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);
2245
	hpsa_cmd_resolve_and_free(h, c);
2246 2247
}

2248 2249 2250 2251 2252 2253 2254 2255
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 &&
2256 2257
			c2->error_data.status == 0))
		return hpsa_cmd_free_and_done(h, c, cmd);
2258

2259 2260
	/*
	 * Any RAID offload error results in retry which will use
2261 2262 2263
	 * the normal I/O path so the controller can handle whatever's
	 * wrong.
	 */
2264
	if (is_logical_device(dev) &&
2265 2266
		c2->error_data.serv_response ==
			IOACCEL2_SERV_RESPONSE_FAILURE) {
2267 2268 2269
		if (c2->error_data.status ==
			IOACCEL2_STATUS_SR_IOACCEL_DISABLED)
			dev->offload_enabled = 0;
2270 2271

		return hpsa_retry_cmd(h, c);
2272
	}
2273 2274

	if (handle_ioaccel_mode2_error(h, c, cmd, c2))
2275
		return hpsa_retry_cmd(h, c);
2276

2277
	return hpsa_cmd_free_and_done(h, c, cmd);
2278 2279
}

2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
/* 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;
}

2308
static void complete_scsi_command(struct CommandList *cp)
2309 2310 2311 2312
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;
2313
	struct hpsa_scsi_dev_t *dev;
2314
	struct io_accel2_cmd *c2;
2315

2316 2317 2318
	u8 sense_key;
	u8 asc;      /* additional sense code */
	u8 ascq;     /* additional sense code qualifier */
2319
	unsigned long sense_data_size;
2320 2321

	ei = cp->err_info;
2322
	cmd = cp->scsi_cmd;
2323
	h = cp->h;
2324
	dev = cmd->device->hostdata;
2325
	c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2326 2327

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
2328
	if ((cp->cmd_type == CMD_SCSI) &&
D
Don Brace 已提交
2329
		(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2330
		hpsa_unmap_sg_chain_block(h, cp);
2331

2332 2333 2334 2335
	if ((cp->cmd_type == CMD_IOACCEL2) &&
		(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
		hpsa_unmap_ioaccel2_sg_chain_block(h, c2);

2336 2337
	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
2338

2339 2340 2341
	if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1)
		atomic_dec(&cp->phys_disk->ioaccel_cmds_out);

2342 2343 2344 2345 2346 2347 2348 2349
	/*
	 * 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;
2350
		return hpsa_cmd_free_and_done(h, cp, cmd);
2351 2352
	}

W
Webb Scales 已提交
2353 2354 2355 2356 2357 2358 2359
	if ((unlikely(hpsa_is_pending_event(cp)))) {
		if (cp->reset_pending)
			return hpsa_cmd_resolve_and_free(h, cp);
		if (cp->abort_pending)
			return hpsa_cmd_abort_and_free(h, cp, cmd);
	}

2360 2361 2362
	if (cp->cmd_type == CMD_IOACCEL2)
		return process_ioaccel2_completion(h, cp, cmd, dev);

2363
	scsi_set_resid(cmd, ei->ResidualCnt);
2364 2365
	if (ei->CommandStatus == 0)
		return hpsa_cmd_free_and_done(h, cp, cmd);
2366

2367 2368 2369 2370 2371
	/* 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
2372 2373 2374 2375
		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;
2376
		cp->Header.tag = c->tag;
2377 2378
		memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
		memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2379 2380 2381 2382 2383

		/* Any RAID offload error results in retry which will use
		 * the normal I/O path so the controller can handle whatever's
		 * wrong.
		 */
2384
		if (is_logical_device(dev)) {
2385 2386
			if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
				dev->offload_enabled = 0;
W
Webb Scales 已提交
2387
			return hpsa_retry_cmd(h, cp);
2388
		}
2389 2390
	}

2391 2392 2393 2394
	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406
		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);
2407
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2408
			if (sense_key == ABORTED_COMMAND) {
2409
				cmd->result |= DID_SOFT_ERROR << 16;
2410 2411
				break;
			}
2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446
			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:
2447 2448
		dev_warn(&h->pdev->dev,
			"CDB %16phN data overrun\n", cp->Request.CDB);
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462
		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:
2463
		cmd->result = DID_ERROR << 16;
2464 2465
		dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
				cp->Request.CDB);
2466 2467 2468
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
2469 2470
		dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
			cp->Request.CDB);
2471 2472 2473
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
2474 2475
		dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
			cp->Request.CDB);
2476 2477
		break;
	case CMD_ABORTED:
2478 2479
		/* Return now to avoid calling scsi_done(). */
		return hpsa_cmd_abort_and_free(h, cp, cmd);
2480 2481
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
2482 2483
		dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
			cp->Request.CDB);
2484 2485
		break;
	case CMD_UNSOLICITED_ABORT:
2486
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2487 2488
		dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
			cp->Request.CDB);
2489 2490 2491
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
2492 2493
		dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
			cp->Request.CDB);
2494
		break;
2495 2496 2497 2498
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
2499 2500 2501 2502
	case CMD_TMF_STATUS:
		if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
			cmd->result = DID_ERROR << 16;
		break;
2503 2504 2505 2506 2507 2508 2509 2510
	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;
2511 2512 2513 2514 2515
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}
2516 2517

	return hpsa_cmd_free_and_done(h, cp, cmd);
2518 2519 2520 2521 2522 2523 2524
}

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

2525 2526 2527 2528
	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);
2529 2530
}

2531
static int hpsa_map_one(struct pci_dev *pdev,
2532 2533 2534 2535 2536
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
2537
	u64 addr64;
2538 2539 2540

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
2541
		cp->Header.SGTotal = cpu_to_le16(0);
2542
		return 0;
2543 2544
	}

2545
	addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2546
	if (dma_mapping_error(&pdev->dev, addr64)) {
2547
		/* Prevent subsequent unmap of something never mapped */
2548
		cp->Header.SGList = 0;
2549
		cp->Header.SGTotal = cpu_to_le16(0);
2550
		return -1;
2551
	}
2552 2553 2554 2555 2556
	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 */
2557
	return 0;
2558 2559
}

2560 2561 2562 2563
#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)
2564 2565 2566 2567
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589
	__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);
2590 2591
}

2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603
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;
}

2604
#define MAX_DRIVER_CMD_RETRIES 25
2605 2606
static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2607
{
2608
	int backoff_time = 10, retry_count = 0;
2609
	int rc;
2610 2611

	do {
2612
		memset(c->err_info, 0, sizeof(*c->err_info));
2613 2614 2615 2616
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						  timeout_msecs);
		if (rc)
			break;
2617
		retry_count++;
2618 2619 2620 2621 2622
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
2623
	} while ((check_for_unit_attention(h, c) ||
2624 2625
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
2626
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2627 2628 2629
	if (retry_count > MAX_DRIVER_CMD_RETRIES)
		rc = -EIO;
	return rc;
2630 2631
}

2632 2633
static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
				struct CommandList *c)
2634
{
2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651
	const u8 *cdb = c->Request.CDB;
	const u8 *lun = c->Header.LUN.LunAddrBytes;

	dev_warn(&h->pdev->dev, "%s: LUN:%02x%02x%02x%02x%02x%02x%02x%02x"
	" CDB:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		txt, lun[0], lun[1], lun[2], lun[3],
		lun[4], lun[5], lun[6], lun[7],
		cdb[0], cdb[1], cdb[2], cdb[3],
		cdb[4], cdb[5], cdb[6], cdb[7],
		cdb[8], cdb[9], cdb[10], cdb[11],
		cdb[12], cdb[13], cdb[14], cdb[15]);
}

static void hpsa_scsi_interpret_error(struct ctlr_info *h,
			struct CommandList *cp)
{
	const struct ErrorInfo *ei = cp->err_info;
2652
	struct device *d = &cp->h->pdev->dev;
2653 2654
	u8 sense_key, asc, ascq;
	int sense_len;
2655 2656 2657

	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
2658 2659 2660 2661 2662 2663
		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);
2664 2665
		hpsa_print_cmd(h, "SCSI status", cp);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2666 2667
			dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
				sense_key, asc, ascq);
2668
		else
2669
			dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2670 2671 2672 2673 2674 2675 2676 2677 2678
		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:
2679
		hpsa_print_cmd(h, "overrun condition", cp);
2680 2681 2682 2683 2684
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
		 * to non-existent targets as invalid commands.
		 */
2685 2686
		hpsa_print_cmd(h, "invalid command", cp);
		dev_warn(d, "probably means device no longer present\n");
2687 2688 2689
		}
		break;
	case CMD_PROTOCOL_ERR:
2690
		hpsa_print_cmd(h, "protocol error", cp);
2691 2692
		break;
	case CMD_HARDWARE_ERR:
2693
		hpsa_print_cmd(h, "hardware error", cp);
2694 2695
		break;
	case CMD_CONNECTION_LOST:
2696
		hpsa_print_cmd(h, "connection lost", cp);
2697 2698
		break;
	case CMD_ABORTED:
2699
		hpsa_print_cmd(h, "aborted", cp);
2700 2701
		break;
	case CMD_ABORT_FAILED:
2702
		hpsa_print_cmd(h, "abort failed", cp);
2703 2704
		break;
	case CMD_UNSOLICITED_ABORT:
2705
		hpsa_print_cmd(h, "unsolicited abort", cp);
2706 2707
		break;
	case CMD_TIMEOUT:
2708
		hpsa_print_cmd(h, "timed out", cp);
2709
		break;
2710
	case CMD_UNABORTABLE:
2711
		hpsa_print_cmd(h, "unabortable", cp);
2712
		break;
2713 2714 2715
	case CMD_CTLR_LOCKUP:
		hpsa_print_cmd(h, "controller lockup detected", cp);
		break;
2716
	default:
2717 2718
		hpsa_print_cmd(h, "unknown status", cp);
		dev_warn(d, "Unknown command status %x\n",
2719 2720 2721 2722 2723
				ei->CommandStatus);
	}
}

static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
2724
			u16 page, unsigned char *buf,
2725 2726 2727 2728 2729 2730
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2731
	c = cmd_alloc(h);
2732

2733 2734 2735 2736 2737
	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
2738 2739 2740 2741
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
2742 2743
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2744
		hpsa_scsi_interpret_error(h, c);
2745 2746
		rc = -1;
	}
2747
out:
2748
	cmd_free(h, c);
2749 2750 2751
	return rc;
}

2752
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
2753
	u8 reset_type, int reply_queue)
2754 2755 2756 2757 2758
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2759
	c = cmd_alloc(h);
2760 2761


2762
	/* fill_cmd can't fail here, no data buffer to map. */
S
Scott Teel 已提交
2763
	(void) fill_cmd(c, reset_type, h, NULL, 0, 0,
2764
			scsi3addr, TYPE_MSG);
2765 2766 2767 2768 2769
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
	if (rc) {
		dev_warn(&h->pdev->dev, "Failed to send reset command\n");
		goto out;
	}
2770 2771 2772 2773
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
2774
		hpsa_scsi_interpret_error(h, c);
2775 2776
		rc = -1;
	}
2777
out:
2778
	cmd_free(h, c);
2779 2780 2781
	return rc;
}

W
Webb Scales 已提交
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886
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
2887 2888 2889 2890
		dev_warn(&h->pdev->dev,
			 "Controller lockup detected during reset wait\n");
		rc = -ENODEV;
	}
W
Webb Scales 已提交
2891 2892 2893 2894 2895 2896 2897 2898

	if (unlikely(rc))
		atomic_set(&dev->reset_cmds_out, 0);

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

2899 2900 2901 2902 2903 2904 2905 2906 2907 2908
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;
2909
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0xC1, buf, 64);
2910 2911 2912 2913 2914 2915 2916 2917
	if (rc == 0)
		*raid_level = buf[8];
	if (*raid_level > RAID_UNKNOWN)
		*raid_level = RAID_UNKNOWN;
	kfree(buf);
	return;
}

2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929
#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;

2930 2931 2932 2933
	/* Show details only if debugging has been activated. */
	if (h->raid_offload_debug < 2)
		return;

2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957
	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
2958
	dev_info(&h->pdev->dev, "flags = 0x%x\n",
2959
			le16_to_cpu(map_buff->flags));
D
Don Brace 已提交
2960 2961 2962
	dev_info(&h->pdev->dev, "encrypytion = %s\n",
			le16_to_cpu(map_buff->flags) &
			RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
2963 2964
	dev_info(&h->pdev->dev, "dekindex = %u\n",
			le16_to_cpu(map_buff->dekindex));
2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002
	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;

3003
	c = cmd_alloc(h);
3004

3005 3006 3007
	if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
			sizeof(this_device->raid_map), 0,
			scsi3addr, TYPE_CMD)) {
3008 3009 3010
		dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
		cmd_free(h, c);
		return -1;
3011
	}
3012 3013 3014 3015
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
3016 3017
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3018
		hpsa_scsi_interpret_error(h, c);
3019 3020
		rc = -1;
		goto out;
3021
	}
3022
	cmd_free(h, c);
3023 3024 3025 3026 3027 3028 3029 3030 3031

	/* @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;
3032 3033 3034
out:
	cmd_free(h, c);
	return rc;
3035 3036
}

3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053
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;

3054 3055
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
						NO_TIMEOUT);
3056 3057 3058 3059 3060 3061 3062 3063 3064 3065
	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;
}

3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108
static int hpsa_vpd_page_supported(struct ctlr_info *h,
	unsigned char scsi3addr[], u8 page)
{
	int rc;
	int i;
	int pages;
	unsigned char *buf, bufsize;

	buf = kzalloc(256, GFP_KERNEL);
	if (!buf)
		return 0;

	/* 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);
	return 0;
exit_supported:
	kfree(buf);
	return 1;
}

3109 3110 3111 3112 3113 3114 3115 3116 3117
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;
3118
	this_device->offload_to_be_enabled = 0;
3119 3120 3121 3122

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
3123 3124
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
		goto out;
3125
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3126
			VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141
	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;
	}
3142
	this_device->offload_to_be_enabled = this_device->offload_enabled;
3143 3144 3145 3146 3147
out:
	kfree(buf);
	return;
}

3148 3149
/* 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
3150
	unsigned char *device_id, int index, int buflen)
3151 3152 3153 3154 3155 3156 3157 3158
{
	int rc;
	unsigned char *buf;

	if (buflen > 16)
		buflen = 16;
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
3159
		return -ENOMEM;
3160
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0x83, buf, 64);
3161
	if (rc == 0)
D
Don Brace 已提交
3162 3163
		memcpy(device_id, &buf[index], buflen);

3164
	kfree(buf);
D
Don Brace 已提交
3165

3166 3167 3168 3169
	return rc != 0;
}

static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3170
		void *buf, int bufsize,
3171 3172 3173 3174 3175 3176 3177
		int extended_response)
{
	int rc = IO_OK;
	struct CommandList *c;
	unsigned char scsi3addr[8];
	struct ErrorInfo *ei;

3178
	c = cmd_alloc(h);
3179

3180 3181
	/* address the controller */
	memset(scsi3addr, 0, sizeof(scsi3addr));
3182 3183 3184 3185 3186
	if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
		buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
3187 3188
	if (extended_response)
		c->Request.CDB[1] = extended_response;
3189 3190 3191 3192
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
3193 3194 3195
	ei = c->err_info;
	if (ei->CommandStatus != 0 &&
	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
3196
		hpsa_scsi_interpret_error(h, c);
3197
		rc = -1;
3198
	} else {
3199 3200 3201
		struct ReportLUNdata *rld = buf;

		if (rld->extended_response_flag != extended_response) {
3202 3203 3204
			dev_err(&h->pdev->dev,
				"report luns requested format %u, got %u\n",
				extended_response,
3205
				rld->extended_response_flag);
3206 3207
			rc = -1;
		}
3208
	}
3209
out:
3210
	cmd_free(h, c);
3211 3212 3213 3214
	return rc;
}

static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3215
		struct ReportExtendedLUNdata *buf, int bufsize)
3216
{
3217 3218
	return hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
						HPSA_REPORT_PHYS_EXTENDED);
3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234
}

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;
}

3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248
/* 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? */
3249
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3250 3251 3252 3253 3254
		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);
3255
	if (rc != 0)
3256 3257 3258 3259 3260 3261
		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);
3262
	if (rc != 0)
3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275
		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)
3276
 *  0xff (offline for unknown reasons)
3277 3278 3279
 *  # (integer code indicating one of several NOT READY states
 *     describing why a volume is to be kept offline)
 */
3280
static int hpsa_volume_offline(struct ctlr_info *h,
3281 3282 3283
					unsigned char scsi3addr[])
{
	struct CommandList *c;
3284 3285 3286
	unsigned char *sense;
	u8 sense_key, asc, ascq;
	int sense_len;
3287
	int rc, ldstat = 0;
3288 3289 3290 3291 3292 3293 3294
	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);
3295

3296
	(void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3297 3298 3299 3300 3301
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
	if (rc) {
		cmd_free(h, c);
		return 0;
	}
3302
	sense = c->err_info->SenseInfo;
3303 3304 3305 3306 3307
	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);
3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324
	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
3325
	case HPSA_LV_NOT_AVAILABLE:
3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347
	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
3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369
/*
 * 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);
3370

S
Stephen Cameron 已提交
3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
	(void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
	/* 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;
3383 3384 3385
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
S
Stephen Cameron 已提交
3386 3387 3388 3389 3390 3391 3392 3393
	default:
		rc = 0;
		break;
	}
	cmd_free(h, c);
	return rc;
}

D
Don Brace 已提交
3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405
static void sanitize_inquiry_string(unsigned char *s, int len)
{
	bool terminated = false;

	for (; len > 0; (--len, ++s)) {
		if (*s == 0)
			terminated = true;
		if (terminated || *s < 0x20 || *s > 0x7e)
			*s = ' ';
	}
}

3406
static int hpsa_update_device_info(struct ctlr_info *h,
3407 3408
	unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
	unsigned char *is_OBDR_device)
3409
{
3410 3411 3412 3413 3414 3415

#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)

3416
	unsigned char *inq_buff;
3417
	unsigned char *obdr_sig;
3418
	int rc = 0;
3419

3420
	inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3421 3422
	if (!inq_buff) {
		rc = -ENOMEM;
3423
		goto bail_out;
3424
	}
3425 3426 3427 3428 3429 3430 3431

	/* 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");
3432
		rc = -EIO;
3433 3434 3435
		goto bail_out;
	}

D
Don Brace 已提交
3436 3437 3438
	sanitize_inquiry_string(&inq_buff[8], 8);
	sanitize_inquiry_string(&inq_buff[16], 16);

3439 3440 3441 3442 3443 3444 3445 3446
	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));
	memset(this_device->device_id, 0,
		sizeof(this_device->device_id));
D
Don Brace 已提交
3447
	hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3448 3449 3450
		sizeof(this_device->device_id));

	if (this_device->devtype == TYPE_DISK &&
3451
		is_logical_dev_addr_mode(scsi3addr)) {
3452 3453
		int volume_offline;

3454
		hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3455 3456
		if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
			hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3457 3458 3459 3460
		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;
3461
	} else {
3462
		this_device->raid_level = RAID_UNKNOWN;
3463 3464
		this_device->offload_config = 0;
		this_device->offload_enabled = 0;
3465
		this_device->offload_to_be_enabled = 0;
3466
		this_device->hba_ioaccel_enabled = 0;
3467
		this_device->volume_offline = 0;
3468
		this_device->queue_depth = h->nr_cmds;
3469
	}
3470

3471 3472 3473 3474 3475 3476 3477 3478 3479
	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);
	}
3480 3481 3482 3483 3484
	kfree(inq_buff);
	return 0;

bail_out:
	kfree(inq_buff);
3485
	return rc;
3486 3487
}

S
Stephen Cameron 已提交
3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512
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;
	}
}

3513
static unsigned char *ext_target_model[] = {
3514 3515 3516 3517
	"MSA2012",
	"MSA2024",
	"MSA2312",
	"MSA2324",
3518
	"P2000 G3 SAS",
3519
	"MSA 2040 SAS",
3520 3521 3522
	NULL,
};

3523
static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
3524 3525 3526
{
	int i;

3527 3528 3529
	for (i = 0; ext_target_model[i]; i++)
		if (strncmp(device->model, ext_target_model[i],
			strlen(ext_target_model[i])) == 0)
3530 3531 3532 3533
			return 1;
	return 0;
}

3534 3535
/*
 * Helper function to assign bus, target, lun mapping of devices.
3536 3537 3538
 * 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.)
3539
*/
3540
static void figure_bus_target_lun(struct ctlr_info *h,
3541
	u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
3542
{
3543
	u32 lunid = get_unaligned_le32(lunaddrbytes);
3544 3545 3546

	if (!is_logical_dev_addr_mode(lunaddrbytes)) {
		/* physical device, target and lun filled in later */
3547
		if (is_hba_lunid(lunaddrbytes))
3548 3549
			hpsa_set_bus_target_lun(device,
					HPSA_HBA_BUS, 0, lunid & 0x3fff);
3550
		else
3551
			/* defer target, lun assignment for physical devices */
3552 3553
			hpsa_set_bus_target_lun(device,
					HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
3554 3555 3556
		return;
	}
	/* It's a logical device */
3557
	if (is_ext_target(h, device)) {
3558
		hpsa_set_bus_target_lun(device,
3559 3560
			HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
			lunid & 0x00ff);
3561
		return;
3562
	}
3563 3564
	hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
				0, lunid & 0x3fff);
3565 3566 3567 3568
}

/*
 * If there is no lun 0 on a target, linux won't find any devices.
3569
 * For the external targets (arrays), we have to manually detect the enclosure
3570 3571 3572 3573 3574 3575 3576 3577
 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
 * it for some reason.  *tmpdevice is the target we're adding,
 * this_device is a pointer into the current element of currentsd[]
 * that we're building up in update_scsi_devices(), below.
 * lunzerobits is a bitmap that tracks which targets already have a
 * lun 0 assigned.
 * Returns 1 if an enclosure was added, 0 if not.
 */
3578
static int add_ext_target_dev(struct ctlr_info *h,
3579
	struct hpsa_scsi_dev_t *tmpdevice,
3580
	struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
3581
	unsigned long lunzerobits[], int *n_ext_target_devs)
3582 3583 3584
{
	unsigned char scsi3addr[8];

3585
	if (test_bit(tmpdevice->target, lunzerobits))
3586 3587 3588 3589 3590
		return 0; /* There is already a lun 0 on this target. */

	if (!is_logical_dev_addr_mode(lunaddrbytes))
		return 0; /* It's the logical targets that may lack lun 0. */

3591 3592
	if (!is_ext_target(h, tmpdevice))
		return 0; /* Only external target devices have this problem. */
3593

3594
	if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
3595 3596
		return 0;

3597
	memset(scsi3addr, 0, 8);
3598
	scsi3addr[3] = tmpdevice->target;
3599 3600 3601
	if (is_hba_lunid(scsi3addr))
		return 0; /* Don't add the RAID controller here. */

3602 3603 3604
	if (is_scsi_rev_5(h))
		return 0; /* p1210m doesn't need to do this. */

3605
	if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
3606 3607
		dev_warn(&h->pdev->dev, "Maximum number of external "
			"target devices exceeded.  Check your hardware "
3608 3609 3610 3611
			"configuration.");
		return 0;
	}

3612
	if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
3613
		return 0;
3614
	(*n_ext_target_devs)++;
3615 3616
	hpsa_set_bus_target_lun(this_device,
				tmpdevice->bus, tmpdevice->target, 0);
S
Stephen Cameron 已提交
3617
	hpsa_update_device_supports_aborts(h, this_device, scsi3addr);
3618
	set_bit(tmpdevice->target, lunzerobits);
3619 3620 3621
	return 1;
}

3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632
/*
 * 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)
{
3633 3634 3635
	struct io_accel2_cmd *c2 =
			&h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
	unsigned long flags;
3636 3637
	int i;

3638 3639 3640 3641 3642 3643 3644 3645 3646 3647
	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;
3648
}
3649

3650 3651 3652 3653 3654 3655 3656
/*
 * 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,
3657
	struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
3658
	struct ReportLUNdata *logdev, u32 *nlogicals)
3659
{
3660
	if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3661 3662 3663
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		return -1;
	}
3664
	*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
3665
	if (*nphysicals > HPSA_MAX_PHYS_LUN) {
3666 3667
		dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
			HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
3668 3669
		*nphysicals = HPSA_MAX_PHYS_LUN;
	}
3670
	if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
3671 3672 3673
		dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
		return -1;
	}
3674
	*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692
	/* 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
3693 3694
static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlogicals,
3695
	struct ReportExtendedLUNdata *physdev_list,
3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709
	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)
3710 3711
		return &physdev_list->LUN[i -
				(raid_ctlr_position == 0)].lunid[0];
3712 3713 3714 3715 3716 3717 3718 3719

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

3720 3721 3722
/* 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,
3723
		struct ReportExtendedLUNdata *rlep, int rle_index,
3724 3725 3726
		struct bmic_identify_physical_device *id_phys)
{
	int rc;
3727
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
3728 3729

	dev->ioaccel_handle = rle->ioaccel_handle;
3730
	if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
3731
		dev->hba_ioaccel_enabled = 1;
3732
	memset(id_phys, 0, sizeof(*id_phys));
3733 3734
	rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
			GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746
			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 */
}

3747
static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
3748
	struct ReportExtendedLUNdata *rlep, int rle_index,
3749 3750
	struct bmic_identify_physical_device *id_phys)
{
3751 3752 3753
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];

	if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772
		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));
}

D
Don Brace 已提交
3773
static void hpsa_update_scsi_devices(struct ctlr_info *h)
3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784
{
	/* 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.
	 */
3785
	struct ReportExtendedLUNdata *physdev_list = NULL;
3786
	struct ReportLUNdata *logdev_list = NULL;
3787
	struct bmic_identify_physical_device *id_phys = NULL;
3788 3789 3790
	u32 nphysicals = 0;
	u32 nlogicals = 0;
	u32 ndev_allocated = 0;
3791 3792
	struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
	int ncurrent = 0;
3793
	int i, n_ext_target_devs, ndevs_to_allocate;
3794
	int raid_ctlr_position;
K
Kevin Barnett 已提交
3795
	bool physical_device;
3796
	DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
3797

3798
	currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
3799 3800
	physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
	logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
3801
	tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
3802
	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3803

3804 3805
	if (!currentsd || !physdev_list || !logdev_list ||
		!tmpdevice || !id_phys) {
3806 3807 3808 3809 3810
		dev_err(&h->pdev->dev, "out of memory\n");
		goto out;
	}
	memset(lunzerobits, 0, sizeof(lunzerobits));

D
Don Brace 已提交
3811 3812
	h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */

3813
	if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
D
Don Brace 已提交
3814 3815
			logdev_list, &nlogicals)) {
		h->drv_req_rescan = 1;
3816
		goto out;
D
Don Brace 已提交
3817
	}
3818

3819 3820 3821
	/* 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.
3822
	 */
3823
	ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
3824 3825 3826

	/* Allocate the per device structures */
	for (i = 0; i < ndevs_to_allocate; i++) {
3827 3828 3829 3830 3831 3832 3833
		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;
		}

3834 3835 3836 3837
		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
3838
			h->drv_req_rescan = 1;
3839 3840 3841 3842 3843
			goto out;
		}
		ndev_allocated++;
	}

3844
	if (is_scsi_rev_5(h))
3845 3846 3847 3848
		raid_ctlr_position = 0;
	else
		raid_ctlr_position = nphysicals + nlogicals;

3849
	/* adjust our table of devices */
3850
	n_ext_target_devs = 0;
3851
	for (i = 0; i < nphysicals + nlogicals + 1; i++) {
3852
		u8 *lunaddrbytes, is_OBDR = 0;
3853
		int rc = 0;
3854
		int phys_dev_index = i - (raid_ctlr_position == 0);
3855

K
Kevin Barnett 已提交
3856 3857
		physical_device = i < nphysicals + (raid_ctlr_position == 0);

3858
		/* Figure out where the LUN ID info is coming from */
3859 3860
		lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
			i, nphysicals, nlogicals, physdev_list, logdev_list);
3861 3862

		/* skip masked non-disk devices */
K
Kevin Barnett 已提交
3863 3864 3865
		if (MASKED_DEVICE(lunaddrbytes) && physical_device &&
			(physdev_list->LUN[phys_dev_index].device_flags & 0x01))
			continue;
3866 3867

		/* Get device type, vendor, model, device id */
3868 3869 3870 3871 3872
		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
3873
			h->drv_req_rescan = 1;
3874
			goto out;
D
Don Brace 已提交
3875
		}
3876 3877 3878 3879 3880 3881
		if (rc) {
			dev_warn(&h->pdev->dev,
				"Inquiry failed, skipping device.\n");
			continue;
		}

3882
		figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
S
Stephen Cameron 已提交
3883
		hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
3884 3885 3886
		this_device = currentsd[ncurrent];

		/*
3887
		 * For external target devices, we have to insert a LUN 0 which
3888 3889 3890 3891 3892
		 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
		 * is nonetheless an enclosure device there.  We have to
		 * present that otherwise linux won't find anything if
		 * there is no lun 0.
		 */
3893
		if (add_ext_target_dev(h, tmpdevice, this_device,
3894
				lunaddrbytes, lunzerobits,
3895
				&n_ext_target_devs)) {
3896 3897 3898 3899 3900
			ncurrent++;
			this_device = currentsd[ncurrent];
		}

		*this_device = *tmpdevice;
K
Kevin Barnett 已提交
3901
		this_device->physical_device = physical_device;
3902

K
Kevin Barnett 已提交
3903 3904 3905 3906 3907
		/*
		 * Expose all devices except for physical devices that
		 * are masked.
		 */
		if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
3908 3909 3910
			this_device->expose_device = 0;
		else
			this_device->expose_device = 1;
3911

3912
		switch (this_device->devtype) {
3913
		case TYPE_ROM:
3914 3915 3916 3917 3918 3919 3920
			/* 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.
			 */
3921 3922
			if (is_OBDR)
				ncurrent++;
3923 3924
			break;
		case TYPE_DISK:
K
Kevin Barnett 已提交
3925
			if (this_device->physical_device) {
3926 3927
				/* The disk is in HBA mode. */
				/* Never use RAID mapper in HBA mode. */
3928
				this_device->offload_enabled = 0;
3929
				hpsa_get_ioaccel_drive_info(h, this_device,
3930 3931 3932
					physdev_list, phys_dev_index, id_phys);
				hpsa_get_path_info(this_device,
					physdev_list, phys_dev_index, id_phys);
3933
			}
3934
			ncurrent++;
3935 3936 3937
			break;
		case TYPE_TAPE:
		case TYPE_MEDIUM_CHANGER:
3938
		case TYPE_ENCLOSURE:
3939
			ncurrent++;
3940
			break;
3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953
		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;
		}
3954
		if (ncurrent >= HPSA_MAX_DEVICES)
3955 3956
			break;
	}
D
Don Brace 已提交
3957
	adjust_hpsa_scsi_table(h, currentsd, ncurrent);
3958 3959 3960 3961 3962 3963 3964
out:
	kfree(tmpdevice);
	for (i = 0; i < ndev_allocated; i++)
		kfree(currentsd[i]);
	kfree(currentsd);
	kfree(physdev_list);
	kfree(logdev_list);
3965
	kfree(id_phys);
3966 3967
}

3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978
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;
}

3979 3980
/*
 * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
3981 3982 3983
 * dma mapping  and fills in the scatter gather entries of the
 * hpsa command, cp.
 */
3984
static int hpsa_scatter_gather(struct ctlr_info *h,
3985 3986 3987 3988
		struct CommandList *cp,
		struct scsi_cmnd *cmd)
{
	struct scatterlist *sg;
3989
	int use_sg, i, sg_limit, chained, last_sg;
3990
	struct SGDescriptor *curr_sg;
3991

3992
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
3993 3994 3995 3996 3997 3998 3999 4000

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

	if (!use_sg)
		goto sglist_finished;

4001 4002 4003 4004 4005 4006 4007
	/*
	 * 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.
	 */
4008
	curr_sg = cp->SG;
4009 4010 4011 4012
	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) {
4013
		hpsa_set_sg_descriptor(curr_sg, sg);
4014 4015
		curr_sg++;
	}
4016

4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031
	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++;
		}
	}

4032
	/* Back the pointer up to the last entry and mark it as "last". */
4033
	(curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4034 4035 4036 4037 4038 4039

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

	if (chained) {
		cp->Header.SGList = h->max_cmd_sg_entries;
4040
		cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4041 4042 4043 4044
		if (hpsa_map_sg_chain_block(h, cp)) {
			scsi_dma_unmap(cmd);
			return -1;
		}
4045
		return 0;
4046 4047 4048 4049
	}

sglist_finished:

4050
	cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4051
	cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4052 4053 4054
	return 0;
}

4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069
#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) {
4070
			block = get_unaligned_be16(&cdb[2]);
4071
			block_cnt = cdb[4];
4072 4073
			if (block_cnt == 0)
				block_cnt = 256;
4074 4075
		} else {
			BUG_ON(*cdb_len != 12);
4076 4077
			block = get_unaligned_be32(&cdb[2]);
			block_cnt = get_unaligned_be32(&cdb[6]);
4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097
		}
		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;
}

4098
static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4099
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4100
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111
{
	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;

4112
	/* TODO: implement chaining support */
4113 4114
	if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4115
		return IO_ACCEL_INELIGIBLE;
4116
	}
4117

4118 4119
	BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);

4120 4121
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4122
		return IO_ACCEL_INELIGIBLE;
4123
	}
4124

4125 4126 4127 4128 4129 4130 4131 4132
	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);
4133 4134
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4135
		return use_sg;
4136
	}
4137 4138 4139 4140 4141 4142 4143

	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;
4144 4145 4146
			curr_sg->Addr = cpu_to_le64(addr64);
			curr_sg->Len = cpu_to_le32(len);
			curr_sg->Ext = cpu_to_le32(0);
4147 4148
			curr_sg++;
		}
4149
		(--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170

		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;
	}

4171
	c->Header.SGList = use_sg;
4172
	/* Fill out the command structure to submit */
D
Don Brace 已提交
4173 4174 4175 4176 4177
	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);
4178 4179
	memcpy(cp->CDB, cdb, cdb_len);
	memcpy(cp->CISS_LUN, scsi3addr, 8);
4180
	/* Tag was already set at init time. */
4181
	enqueue_cmd_and_start_io(h, c);
4182 4183
	return 0;
}
4184

4185 4186 4187 4188 4189 4190 4191 4192 4193 4194
/*
 * 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;

4195 4196
	c->phys_disk = dev;

4197
	return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4198
		cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4199 4200
}

4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212
/*
 * 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
4213
	if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228
		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 WRITE_6:
	case READ_6:
D
Don Brace 已提交
4229
		first_block = get_unaligned_be16(&cmd->cmnd[2]);
4230 4231 4232 4233 4234 4235
		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
4236
		first_block = get_unaligned_be32(&cmd->cmnd[2]);
4237 4238 4239
		break;
	case WRITE_16:
	case READ_16:
D
Don Brace 已提交
4240
		first_block = get_unaligned_be64(&cmd->cmnd[2]);
4241 4242 4243
		break;
	default:
		dev_err(&h->pdev->dev,
D
Don Brace 已提交
4244 4245
			"ERROR: %s: size (0x%x) not supported for encryption\n",
			__func__, cmd->cmnd[0]);
4246 4247 4248
		BUG();
		break;
	}
D
Don Brace 已提交
4249 4250 4251 4252 4253 4254 4255

	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);
4256 4257
}

4258 4259
static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4260
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4261 4262 4263 4264 4265 4266 4267 4268 4269 4270
{
	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;

4271
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4272

4273 4274
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4275
		return IO_ACCEL_INELIGIBLE;
4276 4277
	}

4278 4279 4280 4281 4282 4283 4284 4285 4286 4287
	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);
4288 4289
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4290
		return use_sg;
4291
	}
4292 4293 4294

	if (use_sg) {
		curr_sg = cp->sg;
4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306
		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];
		}
4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321
		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:
4322 4323
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_OUT;
4324 4325
			break;
		case DMA_FROM_DEVICE:
4326 4327
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_IN;
4328 4329
			break;
		case DMA_NONE:
4330 4331
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_NO_DATA;
4332 4333 4334 4335 4336 4337 4338 4339
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
				cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
4340 4341
		cp->direction &= ~IOACCEL2_DIRECTION_MASK;
		cp->direction |= IOACCEL2_DIR_NO_DATA;
4342
	}
4343 4344 4345 4346

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

D
Don Brace 已提交
4347
	cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4348
	cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4349 4350 4351 4352 4353
	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));
4354
	cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4355

4356 4357 4358
	/* fill in sg elements */
	if (use_sg > h->ioaccel_maxsg) {
		cp->sg_count = 1;
D
Don Brace 已提交
4359
		cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
4360 4361 4362 4363 4364 4365 4366 4367
		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;

4368 4369 4370 4371 4372 4373 4374 4375 4376
	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,
4377
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4378
{
4379 4380 4381 4382 4383 4384
	/* 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;
	}
4385 4386
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
4387 4388
						cdb, cdb_len, scsi3addr,
						phys_disk);
4389 4390
	else
		return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
4391 4392
						cdb, cdb_len, scsi3addr,
						phys_disk);
4393 4394
}

4395 4396 4397 4398 4399
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
4400
		*map_index %= le16_to_cpu(map->data_disks_per_row);
4401 4402 4403 4404
		return;
	}
	do {
		/* determine mirror group that *map_index indicates */
D
Don Brace 已提交
4405 4406
		*current_group = *map_index /
			le16_to_cpu(map->data_disks_per_row);
4407 4408
		if (offload_to_mirror == *current_group)
			continue;
D
Don Brace 已提交
4409
		if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
4410
			/* select map index from next group */
D
Don Brace 已提交
4411
			*map_index += le16_to_cpu(map->data_disks_per_row);
4412 4413 4414
			(*current_group)++;
		} else {
			/* select map index from first group */
D
Don Brace 已提交
4415
			*map_index %= le16_to_cpu(map->data_disks_per_row);
4416 4417 4418 4419 4420
			*current_group = 0;
		}
	} while (offload_to_mirror != *current_group);
}

4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438
/*
 * 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;
4439 4440 4441 4442 4443 4444 4445 4446
	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;
4447 4448 4449 4450 4451 4452
	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
4453
	u16 strip_size;
4454 4455 4456
#if BITS_PER_LONG == 32
	u64 tmpdiv;
#endif
4457
	int offload_to_mirror;
4458 4459 4460 4461 4462 4463

	/* check for valid opcode, get LBA and block count */
	switch (cmd->cmnd[0]) {
	case WRITE_6:
		is_write = 1;
	case READ_6:
4464
		first_block = get_unaligned_be16(&cmd->cmnd[2]);
4465
		block_cnt = cmd->cmnd[4];
4466 4467
		if (block_cnt == 0)
			block_cnt = 256;
4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522
		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
4523 4524
	if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
		last_block < first_block)
4525 4526 4527
		return IO_ACCEL_INELIGIBLE;

	/* calculate stripe information for the request */
D
Don Brace 已提交
4528 4529 4530
	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);
4531 4532 4533 4534 4535 4536 4537 4538 4539 4540
#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
4541
	(void) do_div(tmpdiv, strip_size);
4542 4543
	first_column = tmpdiv;
	tmpdiv = last_row_offset;
D
Don Brace 已提交
4544
	(void) do_div(tmpdiv, strip_size);
4545 4546 4547 4548 4549 4550
	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
4551 4552
	first_column = first_row_offset / strip_size;
	last_column = last_row_offset / strip_size;
4553 4554 4555 4556 4557 4558 4559
#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
4560 4561
	total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
4562
	map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
Don Brace 已提交
4563
				le16_to_cpu(map->row_cnt);
4564 4565 4566 4567 4568 4569 4570 4571 4572
	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
4573
		 */
D
Don Brace 已提交
4574
		BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
4575
		if (dev->offload_to_mirror)
D
Don Brace 已提交
4576
			map_index += le16_to_cpu(map->data_disks_per_row);
4577
		dev->offload_to_mirror = !dev->offload_to_mirror;
4578 4579 4580 4581 4582
		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
4583
		BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
4584 4585 4586 4587 4588 4589

		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
4590 4591
			(offload_to_mirror >=
			le16_to_cpu(map->layout_map_count) - 1)
4592 4593 4594 4595 4596 4597 4598 4599 4600
			? 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
4601
		if (le16_to_cpu(map->layout_map_count) <= 1)
4602 4603 4604 4605
			break;

		/* Verify first and last block are in same RAID group */
		r5or6_blocks_per_row =
D
Don Brace 已提交
4606 4607
			le16_to_cpu(map->strip_size) *
			le16_to_cpu(map->data_disks_per_row);
4608
		BUG_ON(r5or6_blocks_per_row == 0);
D
Don Brace 已提交
4609 4610
		stripesize = r5or6_blocks_per_row *
			le16_to_cpu(map->layout_map_count);
4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625
#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
4626
		if (first_group != last_group)
4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672
			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
4673
			r5or6_first_row_offset / le16_to_cpu(map->strip_size);
4674
		r5or6_last_column =
D
Don Brace 已提交
4675
			r5or6_last_row_offset / le16_to_cpu(map->strip_size);
4676 4677 4678 4679 4680 4681
#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
Don Brace 已提交
4682
			le16_to_cpu(map->row_cnt);
4683 4684

		map_index = (first_group *
D
Don Brace 已提交
4685
			(le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
4686 4687 4688 4689
			(map_row * total_disks_per_row) + first_column;
		break;
	default:
		return IO_ACCEL_INELIGIBLE;
4690
	}
4691

4692 4693 4694
	if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
		return IO_ACCEL_INELIGIBLE;

4695 4696
	c->phys_disk = dev->phys_disk[map_index];

4697
	disk_handle = dd[map_index].ioaccel_handle;
D
Don Brace 已提交
4698 4699 4700 4701
	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));
4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743
	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,
4744 4745
						dev->scsi3addr,
						dev->phys_disk[map_index]);
4746 4747
}

4748 4749 4750 4751 4752
/*
 * 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
 */
4753 4754 4755
static int hpsa_ciss_submit(struct ctlr_info *h,
	struct CommandList *c, struct scsi_cmnd *cmd,
	unsigned char scsi3addr[])
4756 4757 4758 4759 4760 4761
{
	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);
4762
	c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
4763 4764 4765 4766 4767 4768 4769 4770 4771

	/* 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:
4772 4773
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
4774 4775
		break;
	case DMA_FROM_DEVICE:
4776 4777
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
4778 4779
		break;
	case DMA_NONE:
4780 4781
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
4782 4783 4784 4785 4786 4787 4788
		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() )
		 */

4789 4790
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807
		/* 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;
	}

4808
	if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
4809
		hpsa_cmd_resolve_and_free(h, c);
4810 4811 4812 4813 4814 4815 4816
		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;
}

4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834
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;
4835
	c->scsi_cmd = SCSI_CMD_IDLE;
4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854
}

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);

4855 4856
	BUG_ON(c->cmdindex != index);

4857 4858 4859 4860 4861
	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
	memset(c->err_info, 0, sizeof(*c->err_info));
	c->busaddr = (u32) cmd_dma_handle;
}

4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877
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;

	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;
4878
	} else if (dev->hba_ioaccel_enabled) {
4879 4880 4881 4882 4883 4884 4885 4886 4887 4888
		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;
}

4889 4890 4891 4892
static void hpsa_command_resubmit_worker(struct work_struct *work)
{
	struct scsi_cmnd *cmd;
	struct hpsa_scsi_dev_t *dev;
4893
	struct CommandList *c = container_of(work, struct CommandList, work);
4894 4895 4896 4897 4898

	cmd = c->scsi_cmd;
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
4899
		return hpsa_cmd_free_and_done(c->h, c, cmd);
4900
	}
W
Webb Scales 已提交
4901 4902
	if (c->reset_pending)
		return hpsa_cmd_resolve_and_free(c->h, c);
4903 4904
	if (c->abort_pending)
		return hpsa_cmd_abort_and_free(c->h, c, cmd);
4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921
	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;
4922
				return hpsa_cmd_free_and_done(h, c, cmd);
4923 4924 4925 4926
			}
			/* else, fall thru and resubmit down CISS path */
		}
	}
4927
	hpsa_cmd_partial_init(c->h, c->cmdindex, c);
4928 4929 4930 4931 4932
	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.
4933 4934 4935
		 *
		 * hpsa_ciss_submit will have already freed c
		 * if it encountered a dma mapping failure.
4936 4937 4938 4939 4940 4941
		 */
		cmd->result = DID_IMM_RETRY << 16;
		cmd->scsi_done(cmd);
	}
}

4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952
/* 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);
4953 4954 4955

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

4956 4957 4958 4959 4960 4961 4962
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		cmd->scsi_done(cmd);
		return 0;
	}

4963
	memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
4964

4965
	if (unlikely(lockup_detected(h))) {
4966
		cmd->result = DID_NO_CONNECT << 16;
4967 4968 4969
		cmd->scsi_done(cmd);
		return 0;
	}
4970
	c = cmd_tagged_alloc(h, cmd);
4971

4972 4973
	/*
	 * Call alternate submit routine for I/O accelerated commands.
4974 4975 4976 4977 4978
	 * Retries always go down the normal I/O path.
	 */
	if (likely(cmd->retries == 0 &&
		cmd->request->cmd_type == REQ_TYPE_FS &&
		h->acciopath_status)) {
4979 4980 4981 4982
		rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
		if (rc == 0)
			return 0;
		if (rc == SCSI_MLQUEUE_HOST_BUSY) {
4983
			hpsa_cmd_resolve_and_free(h, c);
4984
			return SCSI_MLQUEUE_HOST_BUSY;
4985 4986 4987 4988 4989
		}
	}
	return hpsa_ciss_submit(h, c, cmd, scsi3addr);
}

4990
static void hpsa_scan_complete(struct ctlr_info *h)
4991 4992 4993
{
	unsigned long flags;

4994 4995 4996 4997
	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);
4998 4999
}

5000 5001 5002 5003 5004
static void hpsa_scan_start(struct Scsi_Host *sh)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;

5005 5006 5007 5008 5009 5010 5011 5012
	/*
	 * 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);
5013

5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029
	/* 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);

5030 5031
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
5032

D
Don Brace 已提交
5033
	hpsa_update_scsi_devices(h);
5034

5035
	hpsa_scan_complete(h);
5036 5037
}

D
Don Brace 已提交
5038 5039
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
5040 5041 5042 5043
	struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;

	if (!logical_drive)
		return -ENODEV;
D
Don Brace 已提交
5044 5045 5046

	if (qdepth < 1)
		qdepth = 1;
5047 5048 5049 5050
	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
5051 5052
}

5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065
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;
}

5066
static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5067
{
5068 5069
	struct Scsi_Host *sh;
	int error;
5070

5071
	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5072 5073 5074 5075
	if (sh == NULL) {
		dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
		return -ENOMEM;
	}
5076 5077 5078 5079 5080 5081 5082 5083

	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;
5084
	sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5085
	sh->cmd_per_lun = sh->can_queue;
5086 5087 5088 5089
	sh->sg_tablesize = h->maxsgentries;
	sh->hostdata[0] = (unsigned long) h;
	sh->irq = h->intr[h->intr_mode];
	sh->unique_id = sh->irq;
5090 5091 5092 5093 5094
	error = scsi_init_shared_tag_map(sh, sh->can_queue);
	if (error) {
		dev_err(&h->pdev->dev,
			"%s: scsi_init_shared_tag_map failed for controller %d\n",
			__func__, h->ctlr);
5095 5096
			scsi_host_put(sh);
			return error;
5097
	}
5098
	h->scsi_host = sh;
5099
	return 0;
5100
}
5101

5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112
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;
5113 5114
}

5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131
/*
 * 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;
}

5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174
/*
 * 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);
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
	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)
5175
{
5176
	int rc;
5177 5178 5179 5180
	int count = 0;
	int waittime = 1; /* seconds */

	/* Send test unit ready until device ready, or give up. */
5181
	for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5182

5183 5184
		/*
		 * Wait for a bit.  do this first, because if we send
5185 5186 5187
		 * the TUR right away, the reset will just abort it.
		 */
		msleep(1000 * waittime);
5188 5189 5190 5191

		rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
		if (!rc)
			break;
5192 5193 5194

		/* Increase wait time with each try, up to a point. */
		if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5195
			waittime *= 2;
5196

5197 5198 5199 5200
		dev_warn(&h->pdev->dev,
			 "waiting %d secs for device to become ready.\n",
			 waittime);
	}
5201

5202 5203
	return rc;
}
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
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)
5233 5234 5235 5236 5237 5238 5239 5240
			break;
	}

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

5241
	cmd_free(h, c);
5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252
	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
5253
	u8 reset_type;
5254
	char msg[48];
5255 5256 5257 5258 5259

	/* find the controller to which the command to be aborted was sent */
	h = sdev_to_hba(scsicmd->device);
	if (h == NULL) /* paranoia */
		return FAILED;
5260 5261 5262 5263

	if (lockup_detected(h))
		return FAILED;

5264 5265
	dev = scsicmd->device->hostdata;
	if (!dev) {
W
Webb Scales 已提交
5266
		dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
5267 5268
		return FAILED;
	}
5269 5270 5271

	/* if controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
5272 5273 5274
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5275
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5276 5277 5278 5279 5280
		return FAILED;
	}

	/* this reset request might be the result of a lockup; check */
	if (detect_controller_lockup(h)) {
5281 5282 5283
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, new lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5284
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5285 5286 5287
		return FAILED;
	}

W
Webb Scales 已提交
5288 5289 5290 5291
	/* Do not attempt on controller */
	if (is_hba_lunid(dev->scsi3addr))
		return SUCCESS;

S
Scott Teel 已提交
5292 5293 5294 5295 5296 5297 5298 5299
	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);
5300

D
Don Brace 已提交
5301 5302
	h->reset_in_progress = 1;

5303
	/* send a reset to the SCSI LUN which the command was sent to */
S
Scott Teel 已提交
5304
	rc = hpsa_do_reset(h, dev, dev->scsi3addr, reset_type,
W
Webb Scales 已提交
5305
			   DEFAULT_REPLY_QUEUE);
S
Scott Teel 已提交
5306 5307 5308
	sprintf(msg, "reset %s %s",
		reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
		rc == 0 ? "completed successfully" : "failed");
W
Webb Scales 已提交
5309
	hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
D
Don Brace 已提交
5310
	h->reset_in_progress = 0;
W
Webb Scales 已提交
5311
	return rc == 0 ? SUCCESS : FAILED;
5312 5313
}

5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328
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];
}

5329
static void hpsa_get_tag(struct ctlr_info *h,
D
Don Brace 已提交
5330
	struct CommandList *c, __le32 *taglower, __le32 *tagupper)
5331
{
D
Don Brace 已提交
5332
	u64 tag;
5333 5334 5335
	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
5336 5337 5338
		tag = le64_to_cpu(cm1->tag);
		*tagupper = cpu_to_le32(tag >> 32);
		*taglower = cpu_to_le32(tag);
5339 5340 5341 5342 5343
		return;
	}
	if (c->cmd_type == CMD_IOACCEL2) {
		struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
			&h->ioaccel2_cmd_pool[c->cmdindex];
5344 5345 5346
		/* upper tag not used in ioaccel2 mode */
		memset(tagupper, 0, sizeof(*tagupper));
		*taglower = cm2->Tag;
5347
		return;
5348
	}
D
Don Brace 已提交
5349 5350 5351
	tag = le64_to_cpu(c->Header.tag);
	*tagupper = cpu_to_le32(tag >> 32);
	*taglower = cpu_to_le32(tag);
5352 5353
}

5354
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
S
Stephen Cameron 已提交
5355
	struct CommandList *abort, int reply_queue)
5356 5357 5358 5359
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;
D
Don Brace 已提交
5360
	__le32 tagupper, taglower;
5361

5362
	c = cmd_alloc(h);
5363

5364
	/* fill_cmd can't fail here, no buffer to map */
S
Stephen Cameron 已提交
5365
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
5366
		0, 0, scsi3addr, TYPE_MSG);
S
Stephen Cameron 已提交
5367
	if (h->needs_abort_tags_swizzled)
5368
		swizzle_abort_tag(&c->Request.CDB[4]);
5369
	(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
5370
	hpsa_get_tag(h, abort, &taglower, &tagupper);
5371
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
5372
		__func__, tagupper, taglower);
5373 5374 5375 5376 5377 5378
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_SUCCESS:
		break;
5379 5380 5381
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
5382 5383 5384 5385 5386
	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",
5387
			__func__, tagupper, taglower);
5388
		hpsa_scsi_interpret_error(h, c);
5389 5390 5391
		rc = -1;
		break;
	}
5392
	cmd_free(h, c);
5393 5394
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
		__func__, tagupper, taglower);
5395 5396 5397
	return rc;
}

5398 5399 5400 5401 5402 5403 5404
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];
5405
	struct scsi_cmnd *scmd = command_to_abort->scsi_cmd;
5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419
	struct hpsa_scsi_dev_t *dev = scmd->device->hostdata;

	/*
	 * 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;
5420 5421
	c->scsi_cmd = SCSI_CMD_BUSY;

5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439
	/* 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));
}

5440 5441 5442 5443 5444 5445 5446 5447
/* 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,
5448
	unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
5449 5450 5451 5452 5453 5454 5455 5456
{
	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. */
5457
	scmd = abort->scsi_cmd;
5458 5459 5460 5461 5462 5463 5464
	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 */
	}

5465 5466
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
5467
			"scsi %d:%d:%d:%d %s scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
5468
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
5469
			"Reset as abort",
5470 5471 5472
			scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
			scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]);

5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485
	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 */
5486 5487 5488 5489 5490
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
			"Reset as abort: Resetting physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
W
Webb Scales 已提交
5491
	rc = hpsa_do_reset(h, dev, psa, HPSA_RESET_TYPE_TARGET, reply_queue);
5492 5493 5494 5495 5496 5497 5498 5499 5500
	if (rc != 0) {
		dev_warn(&h->pdev->dev,
			"Reset as abort: Failed on physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
		return rc; /* failed to reset */
	}

	/* wait for device to recover */
5501
	if (wait_for_device_to_become_ready(h, psa, reply_queue) != 0) {
5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517
		dev_warn(&h->pdev->dev,
			"Reset as abort: Failed: Device never recovered from reset: 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
		return -1;  /* failed to recover */
	}

	/* device recovered */
	dev_info(&h->pdev->dev,
		"Reset as abort: Device recovered from reset: scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		psa[0], psa[1], psa[2], psa[3],
		psa[4], psa[5], psa[6], psa[7]);

	return rc; /* success */
}

5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566
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;
	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];
	(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
	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;
}

5567
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
5568
	unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
5569
{
5570 5571
	/*
	 * ioccelerator mode 2 commands should be aborted via the
5572
	 * accelerated path, since RAID path is unaware of these commands,
5573 5574
	 * but not all underlying firmware can handle abort TMF.
	 * Change abort to physical device reset when abort TMF is unsupported.
5575
	 */
5576 5577 5578 5579 5580 5581
	if (abort->cmd_type == CMD_IOACCEL2) {
		if (HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags)
			return hpsa_send_abort_ioaccel2(h, abort,
						reply_queue);
		else
			return hpsa_send_reset_as_abort_ioaccel2(h, scsi3addr,
5582
							abort, reply_queue);
5583
	}
S
Stephen Cameron 已提交
5584
	return hpsa_send_abort(h, scsi3addr, abort, reply_queue);
5585
}
5586

5587 5588 5589 5590 5591 5592 5593
/* 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;
5594 5595
}

S
Stephen Cameron 已提交
5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607
/*
 * 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));
}

5608 5609 5610 5611 5612 5613 5614
/* 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)
{

5615
	int rc;
5616 5617 5618 5619 5620 5621
	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
5622
	__le32 tagupper, taglower;
5623 5624 5625 5626
	int refcount, reply_queue;

	if (sc == NULL)
		return FAILED;
5627

S
Stephen Cameron 已提交
5628 5629 5630
	if (sc->device == NULL)
		return FAILED;

5631 5632
	/* Find the controller of the command to be aborted */
	h = sdev_to_hba(sc->device);
S
Stephen Cameron 已提交
5633
	if (h == NULL)
5634 5635
		return FAILED;

5636 5637 5638 5639 5640
	/* 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);
5641
		return FAILED;
5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656
	}

	/* 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;
	}
5657

5658 5659 5660 5661 5662 5663
	/* 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));
5664
	ml += sprintf(msg+ml, "scsi %d:%d:%d:%llu %s %p",
5665
		h->scsi_host->host_no, sc->device->channel,
5666
		sc->device->id, sc->device->lun,
5667
		"Aborting command", sc);
5668 5669 5670 5671

	/* Get SCSI command to be aborted */
	abort = (struct CommandList *) sc->host_scribble;
	if (abort == NULL) {
5672 5673 5674 5675 5676 5677 5678
		/* 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;
5679
	}
S
Stephen Cameron 已提交
5680 5681 5682 5683 5684 5685 5686 5687

	/* 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;
	}

5688 5689 5690 5691 5692 5693 5694 5695 5696 5697
	/*
	 * 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;
5698
	hpsa_get_tag(h, abort, &taglower, &tagupper);
5699
	reply_queue = hpsa_extract_reply_queue(h, abort);
5700
	ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
5701
	as  = abort->scsi_cmd;
5702
	if (as != NULL)
5703 5704 5705 5706 5707
		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);
5708
	hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
5709

5710 5711 5712 5713 5714
	/*
	 * 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
5715 5716
	if (wait_for_available_abort_cmd(h)) {
		dev_warn(&h->pdev->dev,
5717 5718
			"%s FAILED, timeout waiting for an abort command to become available.\n",
			msg);
S
Stephen Cameron 已提交
5719 5720 5721
		cmd_free(h, abort);
		return FAILED;
	}
5722
	rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort, reply_queue);
S
Stephen Cameron 已提交
5723 5724
	atomic_inc(&h->abort_cmds_available);
	wake_up_all(&h->abort_cmd_wait_queue);
5725
	if (rc != 0) {
5726
		dev_warn(&h->pdev->dev, "%s SENT, FAILED\n", msg);
5727
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
5728
				"FAILED to abort command");
5729
		cmd_free(h, abort);
5730 5731
		return FAILED;
	}
5732
	dev_info(&h->pdev->dev, "%s SENT, SUCCESS\n", msg);
W
Webb Scales 已提交
5733
	wait_event(h->event_sync_wait_queue,
5734
		   abort->scsi_cmd != sc || lockup_detected(h));
5735
	cmd_free(h, abort);
5736
	return !lockup_detected(h) ? SUCCESS : FAILED;
5737 5738
}

5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790
/*
 * 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);
}

5791 5792 5793 5794 5795
/*
 * 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.
5796 5797
 * This function never gives up and returns NULL.  If it hangs,
 * another thread must call cmd_free() to free some tags.
5798
 */
5799

5800 5801 5802
static struct CommandList *cmd_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
5803
	int refcount, i;
5804
	int offset = 0;
5805

5806 5807
	/*
	 * There is some *extremely* small but non-zero chance that that
5808 5809 5810 5811 5812 5813 5814 5815
	 * 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.
5816 5817 5818 5819 5820 5821 5822
	 *
	 * 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.
5823
	 */
5824

5825
	for (;;) {
5826 5827 5828 5829
		i = find_next_zero_bit(h->cmd_pool_bits,
					HPSA_NRESERVED_CMDS,
					offset);
		if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
5830 5831 5832 5833 5834 5835 5836
			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 */
5837
			offset = (i + 1) % HPSA_NRESERVED_CMDS;
5838 5839 5840 5841 5842 5843
			continue;
		}
		set_bit(i & (BITS_PER_LONG - 1),
			h->cmd_pool_bits + (i / BITS_PER_LONG));
		break; /* it's ours now. */
	}
5844
	hpsa_cmd_partial_init(h, i, c);
5845 5846 5847
	return c;
}

5848 5849 5850 5851 5852 5853
/*
 * 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.
 */
5854 5855
static void cmd_free(struct ctlr_info *h, struct CommandList *c)
{
5856 5857
	if (atomic_dec_and_test(&c->refcount)) {
		int i;
5858

5859 5860 5861 5862
		i = c - h->cmd_pool;
		clear_bit(i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG));
	}
5863 5864 5865 5866
}

#ifdef CONFIG_COMPAT

D
Don Brace 已提交
5867 5868
static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
	void __user *arg)
5869 5870 5871 5872 5873 5874 5875 5876
{
	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;

5877
	memset(&arg64, 0, sizeof(arg64));
5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892
	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
5893
	err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
5894 5895 5896 5897 5898 5899 5900 5901 5902 5903
	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
5904
	int cmd, void __user *arg)
5905 5906 5907 5908 5909 5910 5911 5912 5913
{
	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;

5914
	memset(&arg64, 0, sizeof(arg64));
5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930
	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
5931
	err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
5932 5933 5934 5935 5936 5937 5938 5939
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
5940

D
Don Brace 已提交
5941
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969
{
	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;
	}
}
5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014
#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;
6015
	u64 temp64;
6016
	int rc = 0;
6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030

	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)
6031
			return -ENOMEM;
6032
		if (iocommand.Request.Type.Direction & XFER_WRITE) {
6033 6034 6035
			/* Copy the data into the buffer we created */
			if (copy_from_user(buff, iocommand.buf,
				iocommand.buf_size)) {
6036 6037
				rc = -EFAULT;
				goto out_kfree;
6038 6039 6040
			}
		} else {
			memset(buff, 0, iocommand.buf_size);
6041
		}
6042
	}
6043
	c = cmd_alloc(h);
6044

6045 6046
	/* Fill in the command type */
	c->cmd_type = CMD_IOCTL_PEND;
6047
	c->scsi_cmd = SCSI_CMD_BUSY;
6048 6049 6050 6051
	/* Fill in Command Header */
	c->Header.ReplyQueue = 0; /* unused in simple mode */
	if (iocommand.buf_size > 0) {	/* buffer to fill */
		c->Header.SGList = 1;
6052
		c->Header.SGTotal = cpu_to_le16(1);
6053 6054
	} else	{ /* no buffers to fill */
		c->Header.SGList = 0;
6055
		c->Header.SGTotal = cpu_to_le16(0);
6056 6057 6058 6059 6060 6061 6062 6063 6064
	}
	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) {
6065
		temp64 = pci_map_single(h->pdev, buff,
6066
			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
6067 6068 6069
		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);
6070 6071 6072
			rc = -ENOMEM;
			goto out;
		}
6073 6074 6075
		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 */
6076
	}
6077
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
6078 6079
	if (iocommand.buf_size > 0)
		hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
6080
	check_ioctl_unit_attention(h, c);
6081 6082 6083 6084
	if (rc) {
		rc = -EIO;
		goto out;
	}
6085 6086 6087 6088 6089

	/* Copy the error information out */
	memcpy(&iocommand.error_info, c->err_info,
		sizeof(iocommand.error_info));
	if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6090 6091
		rc = -EFAULT;
		goto out;
6092
	}
6093
	if ((iocommand.Request.Type.Direction & XFER_READ) &&
6094
		iocommand.buf_size > 0) {
6095 6096
		/* Copy the data out of the buffer we created */
		if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6097 6098
			rc = -EFAULT;
			goto out;
6099 6100
		}
	}
6101
out:
6102
	cmd_free(h, c);
6103 6104 6105
out_kfree:
	kfree(buff);
	return rc;
6106 6107 6108 6109 6110 6111 6112 6113
}

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;
6114
	u64 temp64;
6115 6116
	BYTE sg_used = 0;
	int status = 0;
6117 6118
	u32 left;
	u32 sz;
6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144
	BYTE __user *data_ptr;

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	ioc = (BIG_IOCTL_Command_struct *)
	    kmalloc(sizeof(*ioc), GFP_KERNEL);
	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;
	}
6145
	if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6146 6147 6148
		status = -EINVAL;
		goto cleanup1;
	}
6149
	buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
6150 6151 6152 6153
	if (!buff) {
		status = -ENOMEM;
		goto cleanup1;
	}
6154
	buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168
	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;
		}
6169
		if (ioc->Request.Type.Direction & XFER_WRITE) {
6170
			if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6171
				status = -EFAULT;
6172 6173 6174 6175 6176 6177 6178 6179
				goto cleanup1;
			}
		} else
			memset(buff[sg_used], 0, sz);
		left -= sz;
		data_ptr += sz;
		sg_used++;
	}
6180
	c = cmd_alloc(h);
6181

6182
	c->cmd_type = CMD_IOCTL_PEND;
6183
	c->scsi_cmd = SCSI_CMD_BUSY;
6184
	c->Header.ReplyQueue = 0;
6185 6186
	c->Header.SGList = (u8) sg_used;
	c->Header.SGTotal = cpu_to_le16(sg_used);
6187 6188 6189 6190 6191
	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++) {
6192
			temp64 = pci_map_single(h->pdev, buff[i],
6193
				    buff_size[i], PCI_DMA_BIDIRECTIONAL);
6194 6195 6196 6197
			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);
6198 6199 6200
				hpsa_pci_unmap(h->pdev, c, i,
					PCI_DMA_BIDIRECTIONAL);
				status = -ENOMEM;
6201
				goto cleanup0;
6202
			}
6203 6204 6205
			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);
6206
		}
6207
		c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6208
	}
6209
	status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
6210 6211
	if (sg_used)
		hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
6212
	check_ioctl_unit_attention(h, c);
6213 6214 6215 6216 6217
	if (status) {
		status = -EIO;
		goto cleanup0;
	}

6218 6219 6220 6221
	/* 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;
6222
		goto cleanup0;
6223
	}
6224
	if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
D
Don Brace 已提交
6225 6226
		int i;

6227 6228 6229 6230 6231
		/* 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;
6232
				goto cleanup0;
6233 6234 6235 6236 6237
			}
			ptr += buff_size[i];
		}
	}
	status = 0;
6238
cleanup0:
6239
	cmd_free(h, c);
6240 6241
cleanup1:
	if (buff) {
D
Don Brace 已提交
6242 6243
		int i;

6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259
		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);
}
6260

6261 6262 6263
/*
 * ioctl
 */
D
Don Brace 已提交
6264
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6265 6266 6267
{
	struct ctlr_info *h;
	void __user *argp = (void __user *)arg;
6268
	int rc;
6269 6270 6271 6272 6273 6274 6275

	h = sdev_to_hba(dev);

	switch (cmd) {
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
6276
		hpsa_scan_start(h->scsi_host);
6277 6278 6279 6280 6281 6282
		return 0;
	case CCISS_GETPCIINFO:
		return hpsa_getpciinfo_ioctl(h, argp);
	case CCISS_GETDRIVVER:
		return hpsa_getdrivver_ioctl(h, argp);
	case CCISS_PASSTHRU:
6283
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6284 6285
			return -EAGAIN;
		rc = hpsa_passthru_ioctl(h, argp);
6286
		atomic_inc(&h->passthru_cmds_avail);
6287
		return rc;
6288
	case CCISS_BIG_PASSTHRU:
6289
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6290 6291
			return -EAGAIN;
		rc = hpsa_big_passthru_ioctl(h, argp);
6292
		atomic_inc(&h->passthru_cmds_avail);
6293
		return rc;
6294 6295 6296 6297 6298
	default:
		return -ENOTTY;
	}
}

6299
static void hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
6300
				u8 reset_type)
6301 6302 6303 6304
{
	struct CommandList *c;

	c = cmd_alloc(h);
6305

6306 6307
	/* fill_cmd can't fail here, no data buffer to map */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6308 6309 6310 6311 6312 6313 6314 6315
		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.
	 */
6316
	return;
6317 6318
}

6319
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6320
	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6321 6322 6323
	int cmd_type)
{
	int pci_dir = XFER_NONE;
S
Stephen Cameron 已提交
6324
	u64 tag; /* for commands to be aborted */
6325 6326

	c->cmd_type = CMD_IOCTL_PEND;
6327
	c->scsi_cmd = SCSI_CMD_BUSY;
6328 6329 6330
	c->Header.ReplyQueue = 0;
	if (buff != NULL && size > 0) {
		c->Header.SGList = 1;
6331
		c->Header.SGTotal = cpu_to_le16(1);
6332 6333
	} else {
		c->Header.SGList = 0;
6334
		c->Header.SGTotal = cpu_to_le16(0);
6335 6336 6337 6338 6339 6340 6341
	}
	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 */
6342
			if (page_code & VPD_PAGE) {
6343
				c->Request.CDB[1] = 0x01;
6344
				c->Request.CDB[2] = (page_code & 0xff);
6345 6346
			}
			c->Request.CDBLen = 6;
6347 6348
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6349 6350 6351 6352 6353 6354 6355 6356 6357 6358
			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;
6359 6360
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6361 6362 6363 6364 6365 6366 6367 6368 6369
			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;
		case HPSA_CACHE_FLUSH:
			c->Request.CDBLen = 12;
6370 6371 6372
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
6373 6374 6375
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6376 6377
			c->Request.CDB[7] = (size >> 8) & 0xFF;
			c->Request.CDB[8] = size & 0xFF;
6378 6379 6380
			break;
		case TEST_UNIT_READY:
			c->Request.CDBLen = 6;
6381 6382
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6383 6384
			c->Request.Timeout = 0;
			break;
6385 6386
		case HPSA_GET_RAID_MAP:
			c->Request.CDBLen = 12;
6387 6388
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6389 6390 6391 6392 6393 6394 6395 6396
			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;
6397 6398
		case BMIC_SENSE_CONTROLLER_PARAMETERS:
			c->Request.CDBLen = 10;
6399 6400
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6401 6402 6403 6404 6405 6406
			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;
6407 6408 6409 6410 6411 6412 6413 6414 6415 6416
		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;
6417 6418 6419
		default:
			dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
			BUG();
6420
			return -1;
6421 6422 6423 6424
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {

S
Scott Teel 已提交
6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438
		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;
6439 6440
		case  HPSA_DEVICE_RESET_MSG:
			c->Request.CDBLen = 16;
6441 6442
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6443
			c->Request.Timeout = 0; /* Don't time out */
6444 6445
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] =  cmd;
6446
			c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
6447 6448 6449 6450 6451 6452
			/* 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;
6453 6454
			break;
		case  HPSA_ABORT_MSG:
S
Stephen Cameron 已提交
6455
			memcpy(&tag, buff, sizeof(tag));
D
Don Brace 已提交
6456
			dev_dbg(&h->pdev->dev,
S
Stephen Cameron 已提交
6457 6458
				"Abort Tag:0x%016llx using rqst Tag:0x%016llx",
				tag, c->Header.tag);
6459
			c->Request.CDBLen = 16;
6460 6461 6462
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
6463 6464 6465 6466 6467 6468
			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
6469
			memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
6470 6471 6472 6473
			c->Request.CDB[12] = 0x00; /* reserved */
			c->Request.CDB[13] = 0x00; /* reserved */
			c->Request.CDB[14] = 0x00; /* reserved */
			c->Request.CDB[15] = 0x00; /* reserved */
6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484
		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();
	}

6485
	switch (GET_DIR(c->Request.type_attr_dir)) {
6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497
	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;
	}
6498 6499 6500
	if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
		return -1;
	return 0;
6501 6502 6503 6504 6505 6506 6507 6508 6509
}

/*
 * 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;
6510 6511
	void __iomem *page_remapped = ioremap_nocache(page_base,
		page_offs + size);
6512 6513 6514 6515

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

6516
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
6517
{
6518
	return h->access.command_completed(h, q);
6519 6520
}

6521
static inline bool interrupt_pending(struct ctlr_info *h)
6522 6523 6524 6525 6526 6527
{
	return h->access.intr_pending(h);
}

static inline long interrupt_not_for_us(struct ctlr_info *h)
{
6528 6529
	return (h->access.intr_pending(h) == 0) ||
		(h->interrupts_enabled == 0);
6530 6531
}

6532 6533
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
	u32 raw_tag)
6534 6535 6536 6537 6538 6539 6540 6541
{
	if (unlikely(tag_index >= h->nr_cmds)) {
		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
		return 1;
	}
	return 0;
}

6542
static inline void finish_cmd(struct CommandList *c)
6543
{
6544
	dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
6545 6546
	if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
			|| c->cmd_type == CMD_IOACCEL2))
6547
		complete_scsi_command(c);
6548
	else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
6549
		complete(c->waiting);
6550 6551
}

6552
/* process completion of an indexed ("direct lookup") command */
6553
static inline void process_indexed_cmd(struct ctlr_info *h,
6554 6555 6556 6557 6558
	u32 raw_tag)
{
	u32 tag_index;
	struct CommandList *c;

6559
	tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
6560 6561 6562 6563
	if (!bad_tag(h, tag_index, raw_tag)) {
		c = h->cmd_pool + tag_index;
		finish_cmd(c);
	}
6564 6565
}

6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584
/* 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;
}

6585 6586 6587 6588 6589 6590
/*
 * 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)
6591
{
6592 6593 6594 6595 6596 6597 6598
	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;
6599 6600 6601 6602 6603 6604 6605
	u32 raw_tag;

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6606
	h->last_intr_timestamp = get_jiffies_64();
6607
	while (interrupt_pending(h)) {
6608
		raw_tag = get_next_completion(h, q);
6609
		while (raw_tag != FIFO_EMPTY)
6610
			raw_tag = next_command(h, q);
6611 6612 6613 6614
	}
	return IRQ_HANDLED;
}

6615
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
6616
{
6617
	struct ctlr_info *h = queue_to_hba(queue);
6618
	u32 raw_tag;
6619
	u8 q = *(u8 *) queue;
6620 6621 6622 6623

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

6624
	h->last_intr_timestamp = get_jiffies_64();
6625
	raw_tag = get_next_completion(h, q);
6626
	while (raw_tag != FIFO_EMPTY)
6627
		raw_tag = next_command(h, q);
6628 6629 6630
	return IRQ_HANDLED;
}

6631
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
6632
{
6633
	struct ctlr_info *h = queue_to_hba((u8 *) queue);
6634
	u32 raw_tag;
6635
	u8 q = *(u8 *) queue;
6636 6637 6638

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6639
	h->last_intr_timestamp = get_jiffies_64();
6640
	while (interrupt_pending(h)) {
6641
		raw_tag = get_next_completion(h, q);
6642
		while (raw_tag != FIFO_EMPTY) {
6643
			process_indexed_cmd(h, raw_tag);
6644
			raw_tag = next_command(h, q);
6645 6646 6647 6648 6649
		}
	}
	return IRQ_HANDLED;
}

6650
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
6651
{
6652
	struct ctlr_info *h = queue_to_hba(queue);
6653
	u32 raw_tag;
6654
	u8 q = *(u8 *) queue;
6655

6656
	h->last_intr_timestamp = get_jiffies_64();
6657
	raw_tag = get_next_completion(h, q);
6658
	while (raw_tag != FIFO_EMPTY) {
6659
		process_indexed_cmd(h, raw_tag);
6660
		raw_tag = next_command(h, q);
6661 6662 6663 6664
	}
	return IRQ_HANDLED;
}

6665 6666 6667 6668
/* 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.
 */
6669 6670
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
			unsigned char type)
6671 6672 6673 6674 6675 6676 6677 6678 6679 6680
{
	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
6681 6682
	__le32 paddr32;
	u32 tag;
6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696
	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);
6697
		return err;
6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709
	}

	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
6710
	paddr32 = cpu_to_le32(paddr64);
6711 6712 6713

	cmd->CommandHeader.ReplyQueue = 0;
	cmd->CommandHeader.SGList = 0;
6714
	cmd->CommandHeader.SGTotal = cpu_to_le16(0);
D
Don Brace 已提交
6715
	cmd->CommandHeader.tag = cpu_to_le64(paddr64);
6716 6717 6718
	memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);

	cmd->Request.CDBLen = 16;
6719 6720
	cmd->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
6721 6722 6723 6724
	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 */
6725
	cmd->ErrorDescriptor.Addr =
D
Don Brace 已提交
6726
			cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
6727
	cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
6728

D
Don Brace 已提交
6729
	writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
6730 6731 6732

	for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
		tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
D
Don Brace 已提交
6733
		if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763
			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)

6764
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
D
Don Brace 已提交
6765
	void __iomem *vaddr, u32 use_doorbell)
6766 6767 6768 6769 6770 6771 6772 6773
{

	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");
6774
		writel(use_doorbell, vaddr + SA5_DOORBELL);
6775

6776
		/* PMC hardware guys tell us we need a 10 second delay after
6777 6778 6779 6780
		 * 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.
		 */
6781
		msleep(10000);
6782 6783 6784 6785 6786 6787 6788 6789 6790
	} 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." */
6791 6792 6793

		int rc = 0;

6794
		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
6795

6796
		/* enter the D3hot power management state */
6797 6798 6799
		rc = pci_set_power_state(pdev, PCI_D3hot);
		if (rc)
			return rc;
6800 6801 6802 6803

		msleep(500);

		/* enter the D0 power management state */
6804 6805 6806
		rc = pci_set_power_state(pdev, PCI_D0);
		if (rc)
			return rc;
6807 6808 6809 6810 6811 6812 6813

		/*
		 * 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);
6814 6815 6816 6817
	}
	return 0;
}

6818
static void init_driver_version(char *driver_version, int len)
6819 6820
{
	memset(driver_version, 0, len);
6821
	strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
6822 6823
}

6824
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839
{
	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;
}

6840 6841
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
					  unsigned char *driver_ver)
6842 6843 6844 6845 6846 6847 6848
{
	int i;

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

6849
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868
{

	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;
}
6869
/* This does a hard reset of the controller using PCI power management
6870
 * states or the using the doorbell register.
6871
 */
6872
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
6873
{
6874 6875 6876 6877 6878
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
	void __iomem *vaddr;
	unsigned long paddr;
6879
	u32 misc_fw_support;
6880
	int rc;
6881
	struct CfgTable __iomem *cfgtable;
6882
	u32 use_doorbell;
6883
	u16 command_register;
6884

6885 6886
	/* For controllers as old as the P600, this is very nearly
	 * the same thing as
6887 6888 6889 6890 6891 6892
	 *
	 * 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);
	 *
6893 6894 6895
	 * 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.
6896
	 */
6897

6898 6899
	if (!ctlr_is_resettable(board_id)) {
		dev_warn(&pdev->dev, "Controller not resettable\n");
6900 6901
		return -ENODEV;
	}
6902 6903 6904 6905

	/* if controller is soft- but not hard resettable... */
	if (!ctlr_is_hard_resettable(board_id))
		return -ENOTSUPP; /* try soft reset later. */
6906

6907 6908 6909
	/* Save the PCI command register */
	pci_read_config_word(pdev, 4, &command_register);
	pci_save_state(pdev);
6910

6911 6912 6913 6914 6915 6916 6917
	/* 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;
6918

6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929
	/* 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;
	}
6930 6931
	rc = write_driver_ver_to_cfgtable(cfgtable);
	if (rc)
6932
		goto unmap_cfgtable;
6933

6934 6935 6936
	/* If reset via doorbell register is supported, use that.
	 * There are two such methods.  Favor the newest method.
	 */
6937
	misc_fw_support = readl(&cfgtable->misc_fw_support);
6938 6939 6940 6941 6942 6943
	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) {
6944 6945
			dev_warn(&pdev->dev,
				"Soft reset not supported. Firmware update is required.\n");
6946
			rc = -ENOTSUPP; /* try soft reset */
6947 6948 6949
			goto unmap_cfgtable;
		}
	}
6950

6951 6952 6953
	rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
	if (rc)
		goto unmap_cfgtable;
6954

6955 6956
	pci_restore_state(pdev);
	pci_write_config_word(pdev, 4, command_register);
6957

6958 6959 6960 6961
	/* Some devices (notably the HP Smart Array 5i Controller)
	   need a little pause here */
	msleep(HPSA_POST_RESET_PAUSE_MSECS);

6962 6963 6964
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
	if (rc) {
		dev_warn(&pdev->dev,
6965
			"Failed waiting for board to become ready after hard reset\n");
6966 6967 6968
		goto unmap_cfgtable;
	}

6969 6970 6971 6972
	rc = controller_reset_failed(vaddr);
	if (rc < 0)
		goto unmap_cfgtable;
	if (rc) {
6973 6974 6975
		dev_warn(&pdev->dev, "Unable to successfully reset "
			"controller. Will try soft reset.\n");
		rc = -ENOTSUPP;
6976
	} else {
6977
		dev_info(&pdev->dev, "board ready after hard reset.\n");
6978 6979 6980 6981 6982 6983 6984 6985
	}

unmap_cfgtable:
	iounmap(cfgtable);

unmap_vaddr:
	iounmap(vaddr);
	return rc;
6986 6987 6988 6989 6990 6991 6992
}

/*
 *  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
6993
static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
6994
{
6995
#ifdef HPSA_DEBUG
6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015
	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)));
7016
	dev_info(dev, "   Max outstanding commands = %d\n",
7017 7018 7019 7020 7021 7022 7023 7024 7025
	       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 */
7026
}
7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062

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;
}

7063 7064 7065 7066 7067
static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
{
	if (h->msix_vector) {
		if (h->pdev->msix_enabled)
			pci_disable_msix(h->pdev);
R
Robert Elliott 已提交
7068
		h->msix_vector = 0;
7069 7070 7071
	} else if (h->msi_vector) {
		if (h->pdev->msi_enabled)
			pci_disable_msi(h->pdev);
R
Robert Elliott 已提交
7072
		h->msi_vector = 0;
7073 7074 7075
	}
}

7076
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
7077
 * controllers that are capable. If not, we use legacy INTx mode.
7078
 */
7079
static void hpsa_interrupt_mode(struct ctlr_info *h)
7080 7081
{
#ifdef CONFIG_PCI_MSI
7082 7083 7084 7085 7086 7087 7088
	int err, i;
	struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];

	for (i = 0; i < MAX_REPLY_QUEUES; i++) {
		hpsa_msix_entries[i].vector = 0;
		hpsa_msix_entries[i].entry = i;
	}
7089 7090

	/* Some boards advertise MSI but don't really support it */
7091 7092
	if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
	    (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
7093
		goto default_int_mode;
7094
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
7095
		dev_info(&h->pdev->dev, "MSI-X capable controller\n");
7096
		h->msix_vector = MAX_REPLY_QUEUES;
7097 7098
		if (h->msix_vector > num_online_cpus())
			h->msix_vector = num_online_cpus();
7099 7100 7101 7102 7103 7104 7105
		err = pci_enable_msix_range(h->pdev, hpsa_msix_entries,
					    1, h->msix_vector);
		if (err < 0) {
			dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", err);
			h->msix_vector = 0;
			goto single_msi_mode;
		} else if (err < h->msix_vector) {
7106
			dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
7107 7108
			       "available\n", err);
		}
7109 7110 7111 7112
		h->msix_vector = err;
		for (i = 0; i < h->msix_vector; i++)
			h->intr[i] = hpsa_msix_entries[i].vector;
		return;
7113
	}
7114
single_msi_mode:
7115
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
7116
		dev_info(&h->pdev->dev, "MSI capable controller\n");
7117
		if (!pci_enable_msi(h->pdev))
7118 7119
			h->msi_vector = 1;
		else
7120
			dev_warn(&h->pdev->dev, "MSI init failed\n");
7121 7122 7123 7124
	}
default_int_mode:
#endif				/* CONFIG_PCI_MSI */
	/* if we get here we're going to use the default interrupt mode */
7125
	h->intr[h->intr_mode] = h->pdev->irq;
7126 7127
}

7128
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141
{
	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;

7142 7143 7144
	if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
		subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
		!hpsa_allow_any) {
7145 7146 7147 7148 7149 7150 7151
		dev_warn(&pdev->dev, "unrecognized board ID: "
			"0x%08x, ignoring.\n", *board_id);
			return -ENODEV;
	}
	return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}

7152 7153
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar)
7154 7155 7156 7157
{
	int i;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7158
		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7159
			/* addressing mode bits already removed */
7160 7161
			*memory_bar = pci_resource_start(pdev, i);
			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7162 7163 7164
				*memory_bar);
			return 0;
		}
7165
	dev_warn(&pdev->dev, "no memory BAR found\n");
7166 7167 7168
	return -ENODEV;
}

7169 7170
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready)
7171
{
7172
	int i, iterations;
7173
	u32 scratchpad;
7174 7175 7176 7177
	if (wait_for_ready)
		iterations = HPSA_BOARD_READY_ITERATIONS;
	else
		iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7178

7179 7180 7181 7182 7183 7184 7185 7186 7187
	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;
		}
7188 7189
		msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
	}
7190
	dev_warn(&pdev->dev, "board not ready, timed out.\n");
7191 7192 7193
	return -ENODEV;
}

7194 7195 7196
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)
7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208
{
	*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
7209 7210
static void hpsa_free_cfgtables(struct ctlr_info *h)
{
R
Robert Elliott 已提交
7211
	if (h->transtable) {
R
Robert Elliott 已提交
7212
		iounmap(h->transtable);
R
Robert Elliott 已提交
7213 7214 7215
		h->transtable = NULL;
	}
	if (h->cfgtable) {
R
Robert Elliott 已提交
7216
		iounmap(h->cfgtable);
R
Robert Elliott 已提交
7217 7218
		h->cfgtable = NULL;
	}
R
Robert Elliott 已提交
7219 7220 7221 7222 7223
}

/* Find and map CISS config table and transfer table
+ * several items must be unmapped (freed) later
+ * */
7224
static int hpsa_find_cfgtables(struct ctlr_info *h)
7225
{
7226 7227 7228
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
7229
	u32 trans_offset;
7230
	int rc;
7231

7232 7233 7234 7235
	rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
		&cfg_base_addr_index, &cfg_offset);
	if (rc)
		return rc;
7236
	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7237
		       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7238 7239
	if (!h->cfgtable) {
		dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7240
		return -ENOMEM;
7241
	}
7242 7243 7244
	rc = write_driver_ver_to_cfgtable(h->cfgtable);
	if (rc)
		return rc;
7245
	/* Find performant mode table. */
7246
	trans_offset = readl(&h->cfgtable->TransMethodOffset);
7247 7248 7249
	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
7250 7251 7252
	if (!h->transtable) {
		dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
		hpsa_free_cfgtables(h);
7253
		return -ENOMEM;
R
Robert Elliott 已提交
7254
	}
7255 7256 7257
	return 0;
}

7258
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7259
{
7260 7261 7262 7263
#define MIN_MAX_COMMANDS 16
	BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);

	h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7264 7265 7266 7267 7268

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

7269 7270 7271 7272 7273 7274
	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;
7275 7276 7277
	}
}

7278 7279 7280 7281 7282 7283 7284 7285 7286
/* 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;
}

7287 7288 7289 7290
/* Interrogate the hardware for some limits:
 * max commands, max SG elements without chaining, and with chaining,
 * SG chain block size, etc.
 */
7291
static void hpsa_find_board_params(struct ctlr_info *h)
7292
{
7293
	hpsa_get_max_perf_mode_cmds(h);
7294
	h->nr_cmds = h->max_commands;
7295
	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7296
	h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7297 7298
	if (hpsa_supports_chained_sg_blocks(h)) {
		/* Limit in-command s/g elements to 32 save dma'able memory. */
7299
		h->max_cmd_sg_entries = 32;
7300
		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7301 7302
		h->maxsgentries--; /* save one for chain pointer */
	} else {
7303 7304 7305 7306 7307 7308
		/*
		 * 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;
7309
		h->maxsgentries = 31; /* default to traditional values */
7310
		h->chainsize = 0;
7311
	}
7312 7313 7314

	/* Find out what task management functions are supported and cache */
	h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7315 7316 7317 7318
	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");
7319 7320
	if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7321 7322
}

7323 7324
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
A
Akinobu Mita 已提交
7325
	if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7326
		dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7327 7328 7329 7330 7331
		return false;
	}
	return true;
}

7332
static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7333
{
7334
	u32 driver_support;
7335

7336
	driver_support = readl(&(h->cfgtable->driver_support));
A
Arnd Bergmann 已提交
7337 7338
	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
#ifdef CONFIG_X86
7339
	driver_support |= ENABLE_SCSI_PREFETCH;
7340
#endif
7341 7342
	driver_support |= ENABLE_UNIT_ATTN;
	writel(driver_support, &(h->cfgtable->driver_support));
7343 7344
}

7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358
/* 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);
}

7359
static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7360 7361 7362 7363 7364
{
	int i;
	u32 doorbell_value;
	unsigned long flags;
	/* wait until the clear_event_notify bit 6 is cleared by controller. */
7365
	for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7366 7367 7368 7369
		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))
7370
			goto done;
7371
		/* delay and try again */
7372
		msleep(CLEAR_EVENT_WAIT_INTERVAL);
7373
	}
7374 7375 7376
	return -ENODEV;
done:
	return 0;
7377 7378
}

7379
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7380 7381
{
	int i;
7382 7383
	u32 doorbell_value;
	unsigned long flags;
7384 7385 7386 7387 7388

	/* 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.)
	 */
7389
	for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7390 7391
		if (h->remove_in_progress)
			goto done;
7392 7393 7394
		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
7395
		if (!(doorbell_value & CFGTBL_ChangeReq))
7396
			goto done;
7397
		/* delay and try again */
7398
		msleep(MODE_CHANGE_WAIT_INTERVAL);
7399
	}
7400 7401 7402
	return -ENODEV;
done:
	return 0;
7403 7404
}

7405
/* return -ENODEV or other reason on error, 0 on success */
7406
static int hpsa_enter_simple_mode(struct ctlr_info *h)
7407 7408 7409 7410 7411 7412 7413 7414
{
	u32 trans_support;

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

	h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
7415

7416 7417
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
7418
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
7419
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7420 7421
	if (hpsa_wait_for_mode_change_ack(h))
		goto error;
7422
	print_cfg_table(&h->pdev->dev, h->cfgtable);
7423 7424
	if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
		goto error;
7425
	h->transMethod = CFGTBL_Trans_Simple;
7426
	return 0;
7427
error:
7428
	dev_err(&h->pdev->dev, "failed to enter simple mode\n");
7429
	return -ENODEV;
7430 7431
}

R
Robert Elliott 已提交
7432 7433 7434 7435 7436
/* 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
7437
	h->vaddr = NULL;
R
Robert Elliott 已提交
7438
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
7439 7440 7441 7442
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
7443
	pci_disable_device(h->pdev);		/* pci_init 1 */
7444
	pci_release_regions(h->pdev);		/* pci_init 2 */
R
Robert Elliott 已提交
7445 7446 7447
}

/* several items must be freed later */
7448
static int hpsa_pci_init(struct ctlr_info *h)
7449
{
7450
	int prod_index, err;
7451

7452 7453
	prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
	if (prod_index < 0)
7454
		return prod_index;
7455 7456
	h->product_name = products[prod_index].product_name;
	h->access = *(products[prod_index].access);
7457

S
Stephen Cameron 已提交
7458 7459 7460
	h->needs_abort_tags_swizzled =
		ctlr_needs_abort_tags_swizzled(h->board_id);

M
Matthew Garrett 已提交
7461 7462 7463
	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);

7464
	err = pci_enable_device(h->pdev);
7465
	if (err) {
R
Robert Elliott 已提交
7466
		dev_err(&h->pdev->dev, "failed to enable PCI device\n");
7467
		pci_disable_device(h->pdev);
7468 7469 7470
		return err;
	}

7471
	err = pci_request_regions(h->pdev, HPSA);
7472
	if (err) {
7473
		dev_err(&h->pdev->dev,
R
Robert Elliott 已提交
7474
			"failed to obtain PCI resources\n");
7475 7476
		pci_disable_device(h->pdev);
		return err;
7477
	}
7478 7479 7480

	pci_set_master(h->pdev);

7481
	hpsa_interrupt_mode(h);
7482
	err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
7483
	if (err)
R
Robert Elliott 已提交
7484
		goto clean2;	/* intmode+region, pci */
7485
	h->vaddr = remap_pci_mem(h->paddr, 0x250);
7486
	if (!h->vaddr) {
R
Robert Elliott 已提交
7487
		dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
7488
		err = -ENOMEM;
R
Robert Elliott 已提交
7489
		goto clean2;	/* intmode+region, pci */
7490
	}
7491
	err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
7492
	if (err)
R
Robert Elliott 已提交
7493
		goto clean3;	/* vaddr, intmode+region, pci */
7494 7495
	err = hpsa_find_cfgtables(h);
	if (err)
R
Robert Elliott 已提交
7496
		goto clean3;	/* vaddr, intmode+region, pci */
7497
	hpsa_find_board_params(h);
7498

7499
	if (!hpsa_CISS_signature_present(h)) {
7500
		err = -ENODEV;
R
Robert Elliott 已提交
7501
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
7502
	}
7503
	hpsa_set_driver_support_bits(h);
7504
	hpsa_p600_dma_prefetch_quirk(h);
7505 7506
	err = hpsa_enter_simple_mode(h);
	if (err)
R
Robert Elliott 已提交
7507
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
7508 7509
	return 0;

R
Robert Elliott 已提交
7510 7511 7512 7513
clean4:	/* cfgtables, vaddr, intmode+region, pci */
	hpsa_free_cfgtables(h);
clean3:	/* vaddr, intmode+region, pci */
	iounmap(h->vaddr);
R
Robert Elliott 已提交
7514
	h->vaddr = NULL;
R
Robert Elliott 已提交
7515 7516
clean2:	/* intmode+region, pci */
	hpsa_disable_interrupt_mode(h);
7517 7518 7519 7520
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
7521
	pci_disable_device(h->pdev);
7522
	pci_release_regions(h->pdev);
7523 7524 7525
	return err;
}

7526
static void hpsa_hba_inquiry(struct ctlr_info *h)
7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541
{
	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;
	}
}

7542
static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
7543
{
7544
	int rc, i;
7545
	void __iomem *vaddr;
7546 7547 7548 7549

	if (!reset_devices)
		return 0;

7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564 7565
	/* 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;
	}
7566

7567
	pci_set_master(pdev);
7568

7569 7570 7571 7572 7573 7574 7575 7576
	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);

7577
	/* Reset the controller with a PCI power-cycle or via doorbell */
7578
	rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
7579

7580 7581
	/* -ENOTSUPP here means we cannot reset the controller
	 * but it's already (and still) up and running in
7582 7583
	 * "performant mode".  Or, it might be 640x, which can't reset
	 * due to concerns about shared bbwc between 6402/6404 pair.
7584
	 */
7585
	if (rc)
7586
		goto out_disable;
7587 7588

	/* Now try to get the controller to respond to a no-op */
7589
	dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
7590 7591 7592 7593 7594 7595 7596
	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" : ""));
	}
7597 7598 7599 7600 7601

out_disable:

	pci_disable_device(pdev);
	return rc;
7602 7603
}

7604 7605 7606
static void hpsa_free_cmd_pool(struct ctlr_info *h)
{
	kfree(h->cmd_pool_bits);
R
Robert Elliott 已提交
7607 7608
	h->cmd_pool_bits = NULL;
	if (h->cmd_pool) {
7609 7610 7611 7612
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct CommandList),
				h->cmd_pool,
				h->cmd_pool_dhandle);
R
Robert Elliott 已提交
7613 7614 7615 7616
		h->cmd_pool = NULL;
		h->cmd_pool_dhandle = 0;
	}
	if (h->errinfo_pool) {
7617 7618 7619 7620
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct ErrorInfo),
				h->errinfo_pool,
				h->errinfo_pool_dhandle);
R
Robert Elliott 已提交
7621 7622 7623
		h->errinfo_pool = NULL;
		h->errinfo_pool_dhandle = 0;
	}
7624 7625
}

7626
static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
7627 7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638 7639 7640
{
	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__);
7641
		goto clean_up;
7642
	}
7643
	hpsa_preinitialize_commands(h);
7644
	return 0;
7645 7646 7647
clean_up:
	hpsa_free_cmd_pool(h);
	return -ENOMEM;
7648 7649
}

7650 7651
static void hpsa_irq_affinity_hints(struct ctlr_info *h)
{
7652
	int i, cpu;
7653 7654 7655

	cpu = cpumask_first(cpu_online_mask);
	for (i = 0; i < h->msix_vector; i++) {
7656
		irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu));
7657 7658 7659 7660
		cpu = cpumask_next(cpu, cpu_online_mask);
	}
}

7661 7662 7663 7664 7665 7666 7667 7668 7669 7670
/* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
static void hpsa_free_irqs(struct ctlr_info *h)
{
	int i;

	if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
		/* Single reply queue, only one irq to free */
		i = h->intr_mode;
		irq_set_affinity_hint(h->intr[i], NULL);
		free_irq(h->intr[i], &h->q[i]);
R
Robert Elliott 已提交
7671
		h->q[i] = 0;
7672 7673 7674 7675 7676 7677
		return;
	}

	for (i = 0; i < h->msix_vector; i++) {
		irq_set_affinity_hint(h->intr[i], NULL);
		free_irq(h->intr[i], &h->q[i]);
R
Robert Elliott 已提交
7678
		h->q[i] = 0;
7679
	}
7680 7681
	for (; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = 0;
7682 7683
}

7684 7685
/* returns 0 on success; cleans up and returns -Enn on error */
static int hpsa_request_irqs(struct ctlr_info *h,
7686 7687 7688
	irqreturn_t (*msixhandler)(int, void *),
	irqreturn_t (*intxhandler)(int, void *))
{
7689
	int rc, i;
7690

7691 7692 7693 7694 7695 7696 7697
	/*
	 * 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;

7698
	if (h->intr_mode == PERF_MODE_INT && h->msix_vector > 0) {
7699
		/* If performant mode and MSI-X, use multiple reply queues */
7700
		for (i = 0; i < h->msix_vector; i++) {
7701
			sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
7702
			rc = request_irq(h->intr[i], msixhandler,
7703
					0, h->intrname[i],
7704
					&h->q[i]);
7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719
			if (rc) {
				int j;

				dev_err(&h->pdev->dev,
					"failed to get irq %d for %s\n",
				       h->intr[i], h->devname);
				for (j = 0; j < i; j++) {
					free_irq(h->intr[j], &h->q[j]);
					h->q[j] = 0;
				}
				for (; j < MAX_REPLY_QUEUES; j++)
					h->q[j] = 0;
				return rc;
			}
		}
7720
		hpsa_irq_affinity_hints(h);
7721 7722
	} else {
		/* Use single reply pool */
7723
		if (h->msix_vector > 0 || h->msi_vector) {
7724 7725 7726 7727 7728 7729
			if (h->msix_vector)
				sprintf(h->intrname[h->intr_mode],
					"%s-msix", h->devname);
			else
				sprintf(h->intrname[h->intr_mode],
					"%s-msi", h->devname);
7730
			rc = request_irq(h->intr[h->intr_mode],
7731 7732
				msixhandler, 0,
				h->intrname[h->intr_mode],
7733 7734
				&h->q[h->intr_mode]);
		} else {
7735 7736
			sprintf(h->intrname[h->intr_mode],
				"%s-intx", h->devname);
7737
			rc = request_irq(h->intr[h->intr_mode],
7738 7739
				intxhandler, IRQF_SHARED,
				h->intrname[h->intr_mode],
7740 7741
				&h->q[h->intr_mode]);
		}
R
Robert Elliott 已提交
7742
		irq_set_affinity_hint(h->intr[h->intr_mode], NULL);
7743
	}
7744
	if (rc) {
R
Robert Elliott 已提交
7745
		dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
7746
		       h->intr[h->intr_mode], h->devname);
R
Robert Elliott 已提交
7747
		hpsa_free_irqs(h);
7748 7749 7750 7751 7752
		return -ENODEV;
	}
	return 0;
}

7753
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
7754
{
7755
	int rc;
7756
	hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER);
7757 7758

	dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
7759 7760
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
	if (rc) {
7761
		dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
7762
		return rc;
7763 7764 7765
	}

	dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
7766 7767
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
	if (rc) {
7768 7769
		dev_warn(&h->pdev->dev, "Board failed to become ready "
			"after soft reset.\n");
7770
		return rc;
7771 7772 7773 7774 7775
	}

	return 0;
}

7776 7777 7778 7779 7780 7781 7782
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;
7783 7784 7785 7786
		pci_free_consistent(h->pdev,
					h->reply_queue_size,
					h->reply_queue[i].head,
					h->reply_queue[i].busaddr);
7787 7788 7789
		h->reply_queue[i].head = NULL;
		h->reply_queue[i].busaddr = 0;
	}
R
Robert Elliott 已提交
7790
	h->reply_queue_size = 0;
7791 7792
}

7793 7794
static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
R
Robert Elliott 已提交
7795 7796 7797 7798
	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 */
7799 7800 7801
	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 */
7802 7803 7804 7805 7806 7807 7808 7809 7810 7811
	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
7812
	kfree(h);				/* init_one 1 */
7813 7814
}

7815
/* Called when controller lockup detected. */
7816
static void fail_all_outstanding_cmds(struct ctlr_info *h)
7817
{
7818 7819
	int i, refcount;
	struct CommandList *c;
7820
	int failcount = 0;
7821

7822
	flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
7823 7824
	for (i = 0; i < h->nr_cmds; i++) {
		c = h->cmd_pool + i;
7825 7826
		refcount = atomic_inc_return(&c->refcount);
		if (refcount > 1) {
7827
			c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
7828
			finish_cmd(c);
7829
			atomic_dec(&h->commands_outstanding);
7830
			failcount++;
7831 7832
		}
		cmd_free(h, c);
7833
	}
7834 7835
	dev_warn(&h->pdev->dev,
		"failed %d commands in fail_all\n", failcount);
7836 7837
}

7838 7839
static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
{
7840
	int cpu;
7841

7842
	for_each_online_cpu(cpu) {
7843 7844 7845 7846 7847 7848 7849
		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 */
}

7850 7851 7852
static void controller_lockup_detected(struct ctlr_info *h)
{
	unsigned long flags;
7853
	u32 lockup_detected;
7854 7855 7856

	h->access.set_intr_mask(h, HPSA_INTR_OFF);
	spin_lock_irqsave(&h->lock, flags);
7857 7858 7859 7860
	lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
	if (!lockup_detected) {
		/* no heartbeat, but controller gave us a zero. */
		dev_warn(&h->pdev->dev,
7861 7862
			"lockup detected after %d but scratchpad register is zero\n",
			h->heartbeat_sample_interval / HZ);
7863 7864 7865
		lockup_detected = 0xffffffff;
	}
	set_lockup_detected_for_all_cpus(h, lockup_detected);
7866
	spin_unlock_irqrestore(&h->lock, flags);
7867 7868
	dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
			lockup_detected, h->heartbeat_sample_interval / HZ);
7869
	pci_disable_device(h->pdev);
7870
	fail_all_outstanding_cmds(h);
7871 7872
}

7873
static int detect_controller_lockup(struct ctlr_info *h)
7874 7875 7876 7877 7878 7879 7880 7881
{
	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 +
7882
				(h->heartbeat_sample_interval), now))
7883
		return false;
7884 7885 7886 7887 7888 7889 7890

	/*
	 * 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 +
7891
				(h->heartbeat_sample_interval), now))
7892
		return false;
7893 7894 7895 7896 7897 7898 7899

	/* 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);
7900
		return true;
7901 7902 7903 7904 7905
	}

	/* We're ok. */
	h->last_heartbeat = heartbeat;
	h->last_heartbeat_timestamp = now;
7906
	return false;
7907 7908
}

7909
static void hpsa_ack_ctlr_events(struct ctlr_info *h)
7910 7911 7912 7913
{
	int i;
	char *event_type;

7914 7915 7916
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
		return;

7917
	/* Ask the controller to clear the events we're handling. */
7918 7919
	if ((h->transMethod & (CFGTBL_Trans_io_accel1
			| CFGTBL_Trans_io_accel2)) &&
7920 7921 7922 7923 7924 7925 7926 7927 7928 7929 7930
		(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);
		for (i = 0; i < h->ndevices; i++)
			h->dev[i]->offload_enabled = 0;
7931
		hpsa_drain_accel_commands(h);
7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950 7951
		/* 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
	}
7952
	return;
7953 7954 7955 7956
}

/* Check a register on the controller to see if there are configuration
 * changes (added/changed/removed logical drives, etc.) which mean that
7957 7958
 * we should rescan the controller for devices.
 * Also check flag for driver-initiated rescan.
7959
 */
7960
static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
7961
{
D
Don Brace 已提交
7962 7963 7964 7965 7966
	if (h->drv_req_rescan) {
		h->drv_req_rescan = 0;
		return 1;
	}

7967
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
7968
		return 0;
7969 7970

	h->events = readl(&(h->cfgtable->event_notify));
7971 7972
	return h->events & RESCAN_REQUIRED_EVENT_BITS;
}
7973

7974 7975 7976 7977 7978 7979 7980 7981 7982 7983 7984 7985 7986 7987
/*
 * 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);
7988 7989 7990 7991
		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);
7992
			return 1;
7993
		}
7994 7995 7996 7997
		spin_lock_irqsave(&h->offline_device_lock, flags);
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
	return 0;
7998 7999
}

8000
static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8001 8002
{
	unsigned long flags;
8003
	struct ctlr_info *h = container_of(to_delayed_work(work),
8004 8005 8006 8007
					struct ctlr_info, rescan_ctlr_work);


	if (h->remove_in_progress)
8008
		return;
8009 8010 8011 8012 8013 8014 8015

	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);
	}
8016
	spin_lock_irqsave(&h->lock, flags);
8017 8018 8019 8020 8021 8022 8023 8024 8025 8026 8027 8028 8029 8030
	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))
8031
		return;
8032 8033 8034 8035

	spin_lock_irqsave(&h->lock, flags);
	if (!h->remove_in_progress)
		schedule_delayed_work(&h->monitor_ctlr_work,
8036 8037
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
8038 8039
}

8040 8041 8042 8043 8044
static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
						char *name)
{
	struct workqueue_struct *wq = NULL;

8045
	wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8046 8047 8048 8049 8050 8051
	if (!wq)
		dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);

	return wq;
}

8052
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8053
{
8054
	int dac, rc;
8055
	struct ctlr_info *h;
8056 8057
	int try_soft_reset = 0;
	unsigned long flags;
8058
	u32 board_id;
8059 8060 8061 8062

	if (number_of_controllers == 0)
		printk(KERN_INFO DRIVER_NAME "\n");

8063 8064 8065 8066 8067 8068 8069
	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);
8070 8071 8072 8073 8074 8075 8076 8077 8078 8079 8080 8081 8082
	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:
8083

8084 8085 8086 8087 8088
	/* 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);
8089
	h = kzalloc(sizeof(*h), GFP_KERNEL);
R
Robert Elliott 已提交
8090 8091
	if (!h) {
		dev_err(&pdev->dev, "Failed to allocate controller head\n");
8092
		return -ENOMEM;
R
Robert Elliott 已提交
8093
	}
8094

8095
	h->pdev = pdev;
R
Robert Elliott 已提交
8096

8097
	h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8098
	INIT_LIST_HEAD(&h->offline_device_list);
8099
	spin_lock_init(&h->lock);
8100
	spin_lock_init(&h->offline_device_lock);
8101
	spin_lock_init(&h->scan_lock);
8102
	atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
S
Stephen Cameron 已提交
8103
	atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
8104 8105 8106

	/* Allocate and clear per-cpu variable lockup_detected */
	h->lockup_detected = alloc_percpu(u32);
8107
	if (!h->lockup_detected) {
R
Robert Elliott 已提交
8108
		dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8109
		rc = -ENOMEM;
8110
		goto clean1;	/* aer/h */
8111
	}
8112 8113
	set_lockup_detected_for_all_cpus(h, 0);

8114
	rc = hpsa_pci_init(h);
R
Robert Elliott 已提交
8115
	if (rc)
8116 8117 8118 8119 8120 8121 8122
		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 */
8123

8124
	sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8125 8126 8127 8128
	h->ctlr = number_of_controllers;
	number_of_controllers++;

	/* configure PCI DMA stuff */
8129 8130
	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc == 0) {
8131
		dac = 1;
8132 8133 8134 8135 8136 8137
	} 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");
8138
			goto clean3;	/* shost, pci, lu, aer/h */
8139
		}
8140 8141 8142 8143
	}

	/* make sure the board interrupts are off */
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
8144

R
Robert Elliott 已提交
8145 8146
	rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
	if (rc)
8147
		goto clean3;	/* shost, pci, lu, aer/h */
8148
	rc = hpsa_alloc_cmd_pool(h);
8149
	if (rc)
8150
		goto clean4;	/* irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8151 8152
	rc = hpsa_alloc_sg_chain_blocks(h);
	if (rc)
8153
		goto clean5;	/* cmd, irq, shost, pci, lu, aer/h */
8154
	init_waitqueue_head(&h->scan_wait_queue);
S
Stephen Cameron 已提交
8155
	init_waitqueue_head(&h->abort_cmd_wait_queue);
W
Webb Scales 已提交
8156 8157
	init_waitqueue_head(&h->event_sync_wait_queue);
	mutex_init(&h->reset_mutex);
8158
	h->scan_finished = 1; /* no scan currently in progress */
8159 8160

	pci_set_drvdata(pdev, h);
8161
	h->ndevices = 0;
8162

8163
	spin_lock_init(&h->devlock);
R
Robert Elliott 已提交
8164 8165
	rc = hpsa_put_ctlr_into_performant_mode(h);
	if (rc)
8166 8167 8168 8169 8170 8171
		goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */

	/* hook into SCSI subsystem */
	rc = hpsa_scsi_add_host(h);
	if (rc)
		goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184

	/* 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 */
	}
8185

R
Robert Elliott 已提交
8186 8187
	/*
	 * At this point, the controller is ready to take commands.
8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202
	 * 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);
8203
		hpsa_free_irqs(h);
8204
		rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8205 8206
					hpsa_intx_discard_completions);
		if (rc) {
8207 8208
			dev_warn(&h->pdev->dev,
				"Failed to request_irq after soft reset.\n");
8209
			/*
8210 8211 8212 8213 8214 8215 8216 8217 8218
			 * 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
8219 8220
			 */
			goto clean3;
8221 8222 8223 8224 8225
		}

		rc = hpsa_kdump_soft_reset(h);
		if (rc)
			/* Neither hard nor soft reset worked, we're hosed. */
8226
			goto clean7;
8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246

		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)
8247
			/* don't goto clean, we already unallocated */
8248 8249 8250 8251
			return -ENODEV;

		goto reinit_after_soft_reset;
	}
8252

R
Robert Elliott 已提交
8253 8254
	/* Enable Accelerated IO path at driver layer */
	h->acciopath_status = 1;
8255

8256

8257 8258 8259
	/* Turn the interrupts on so we can service requests */
	h->access.set_intr_mask(h, HPSA_INTR_ON);

8260
	hpsa_hba_inquiry(h);
8261 8262 8263 8264 8265 8266

	/* 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);
8267 8268 8269
	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);
8270
	return 0;
8271

8272
clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8273 8274 8275
	hpsa_free_performant_mode(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8276
	hpsa_free_sg_chain_blocks(h);
8277
clean5: /* cmd, irq, shost, pci, lu, aer/h */
8278
	hpsa_free_cmd_pool(h);
8279
clean4: /* irq, shost, pci, lu, aer/h */
8280
	hpsa_free_irqs(h);
8281 8282 8283 8284
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
8285
	hpsa_free_pci_init(h);
8286
clean2: /* lu, aer/h */
R
Robert Elliott 已提交
8287 8288 8289 8290 8291 8292
	if (h->lockup_detected) {
		free_percpu(h->lockup_detected);
		h->lockup_detected = NULL;
	}
clean1:	/* wq/aer/h */
	if (h->resubmit_wq) {
8293
		destroy_workqueue(h->resubmit_wq);
R
Robert Elliott 已提交
8294 8295 8296
		h->resubmit_wq = NULL;
	}
	if (h->rescan_ctlr_wq) {
8297
		destroy_workqueue(h->rescan_ctlr_wq);
R
Robert Elliott 已提交
8298 8299
		h->rescan_ctlr_wq = NULL;
	}
8300
	kfree(h);
8301
	return rc;
8302 8303 8304 8305 8306 8307
}

static void hpsa_flush_cache(struct ctlr_info *h)
{
	char *flush_buf;
	struct CommandList *c;
8308
	int rc;
8309

8310
	if (unlikely(lockup_detected(h)))
8311
		return;
8312 8313 8314 8315
	flush_buf = kzalloc(4, GFP_KERNEL);
	if (!flush_buf)
		return;

8316
	c = cmd_alloc(h);
8317

8318 8319 8320 8321
	if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD)) {
		goto out;
	}
8322 8323 8324 8325
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_TODEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
8326
	if (c->err_info->CommandStatus != 0)
8327
out:
8328 8329
		dev_warn(&h->pdev->dev,
			"error flushing cache on controller\n");
8330
	cmd_free(h, c);
8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344
	kfree(flush_buf);
}

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
8345
	hpsa_free_irqs(h);			/* init_one 4 */
8346
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
8347 8348
}

8349
static void hpsa_free_device_info(struct ctlr_info *h)
8350 8351 8352
{
	int i;

R
Robert Elliott 已提交
8353
	for (i = 0; i < h->ndevices; i++) {
8354
		kfree(h->dev[i]);
R
Robert Elliott 已提交
8355 8356
		h->dev[i] = NULL;
	}
8357 8358
}

8359
static void hpsa_remove_one(struct pci_dev *pdev)
8360 8361
{
	struct ctlr_info *h;
8362
	unsigned long flags;
8363 8364

	if (pci_get_drvdata(pdev) == NULL) {
8365
		dev_err(&pdev->dev, "unable to remove device\n");
8366 8367 8368
		return;
	}
	h = pci_get_drvdata(pdev);
8369 8370 8371 8372 8373

	/* 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);
8374 8375 8376 8377
	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);
8378

D
Don Brace 已提交
8379 8380 8381 8382 8383 8384 8385 8386
	/*
	 * 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
8387
	/* includes hpsa_free_irqs - init_one 4 */
R
Robert Elliott 已提交
8388
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
8389
	hpsa_shutdown(pdev);
8390

R
Robert Elliott 已提交
8391 8392
	hpsa_free_device_info(h);		/* scan */

8393 8394 8395
	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
8396 8397 8398 8399 8400
	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 already called via hpsa_shutdown init_one 4 */
R
Robert Elliott 已提交
8401

8402 8403 8404
	scsi_host_put(h->scsi_host);			/* init_one 3 */
	h->scsi_host = NULL;				/* init_one 3 */

R
Robert Elliott 已提交
8405
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
8406
	hpsa_free_pci_init(h);				/* init_one 2.5 */
R
Robert Elliott 已提交
8407

R
Robert Elliott 已提交
8408 8409 8410 8411
	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 */
	kfree(h);					/* init_one 1 */
8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425
}

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 = {
8426
	.name = HPSA,
8427
	.probe = hpsa_init_one,
8428
	.remove = hpsa_remove_one,
8429 8430 8431 8432 8433 8434
	.id_table = hpsa_pci_device_id,	/* id_table */
	.shutdown = hpsa_shutdown,
	.suspend = hpsa_suspend,
	.resume = hpsa_resume,
};

8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447
/* 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
8448
	int nsgs, int min_blocks, u32 *bucket_map)
8449 8450 8451 8452 8453 8454
{
	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 */
8455
		size = i + min_blocks;
8456 8457
		b = num_buckets; /* Assume the biggest bucket */
		/* Find the bucket that is just big enough */
8458
		for (j = 0; j < num_buckets; j++) {
8459 8460 8461 8462 8463 8464 8465 8466 8467 8468
			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
8469 8470 8471 8472
/*
 * return -ENODEV on err, 0 on success (or no action)
 * allocates numerous items that must be freed later
 */
8473
static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
8474
{
8475 8476
	int i;
	unsigned long register_value;
8477 8478
	unsigned long transMethod = CFGTBL_Trans_Performant |
			(trans_support & CFGTBL_Trans_use_short_tags) |
8479 8480 8481
				CFGTBL_Trans_enable_directed_msix |
			(trans_support & (CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_io_accel2));
8482
	struct access_method access = SA5_performant_access;
8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493

	/* 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.
8494
	 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
8495 8496 8497 8498 8499 8500
	 * 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.
	 */
8501
	int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
8502 8503 8504 8505 8506 8507 8508 8509 8510 8511
#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);
8512
	BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
8513 8514 8515 8516 8517 8518
	/*  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
	 */

8519 8520 8521 8522 8523 8524 8525
	/* 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;

8526
	/* Controller spec: zero out this buffer. */
8527 8528
	for (i = 0; i < h->nreply_queues; i++)
		memset(h->reply_queue[i].head, 0, h->reply_queue_size);
8529

8530 8531
	bft[7] = SG_ENTRIES_IN_CMD + 4;
	calc_bucket_map(bft, ARRAY_SIZE(bft),
8532
				SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
8533 8534 8535 8536 8537
	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);
8538
	writel(h->nreply_queues, &h->transtable->RepQCount);
8539 8540
	writel(0, &h->transtable->RepQCtrAddrLow32);
	writel(0, &h->transtable->RepQCtrAddrHigh32);
8541 8542 8543

	for (i = 0; i < h->nreply_queues; i++) {
		writel(0, &h->transtable->RepQAddr[i].upper);
8544
		writel(h->reply_queue[i].busaddr,
8545 8546 8547
			&h->transtable->RepQAddr[i].lower);
	}

8548
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
8549 8550 8551 8552 8553 8554 8555 8556
	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);
8557 8558 8559 8560 8561 8562
	} 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);
		}
8563
	}
8564
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8565 8566 8567 8568 8569
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - doorbell timeout\n");
		return -ENODEV;
	}
8570 8571
	register_value = readl(&(h->cfgtable->TransportActive));
	if (!(register_value & CFGTBL_Trans_Performant)) {
8572 8573
		dev_err(&h->pdev->dev,
			"performant mode problem - transport not active\n");
8574
		return -ENODEV;
8575
	}
8576
	/* Change the access methods to the performant access methods */
8577 8578 8579
	h->access = access;
	h->transMethod = transMethod;

8580 8581
	if (!((trans_support & CFGTBL_Trans_io_accel1) ||
		(trans_support & CFGTBL_Trans_io_accel2)))
8582
		return 0;
8583

8584 8585 8586 8587 8588 8589 8590 8591 8592 8593
	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);
8594

8595
		/* initialize all reply queue entries to unused */
8596 8597 8598 8599
		for (i = 0; i < h->nreply_queues; i++)
			memset(h->reply_queue[i].head,
				(u8) IOACCEL_MODE1_REPLY_UNUSED,
				h->reply_queue_size);
8600

8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611
		/* 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
8612 8613
			cp->host_context_flags =
				cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
8614 8615
			cp->timeout_sec = 0;
			cp->ReplyQueue = 0;
8616
			cp->tag =
8617
				cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
8618 8619
			cp->host_addr =
				cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
8620 8621 8622 8623 8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638 8639 8640 8641 8642 8643
					(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]);
8644
	}
8645
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8646 8647 8648 8649 8650 8651
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - enabling ioaccel mode\n");
		return -ENODEV;
	}
	return 0;
8652 8653
}

8654 8655 8656
/* 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
8657
	if (h->ioaccel_cmd_pool) {
8658 8659 8660 8661
		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
8662 8663 8664
		h->ioaccel_cmd_pool = NULL;
		h->ioaccel_cmd_pool_dhandle = 0;
	}
8665
	kfree(h->ioaccel1_blockFetchTable);
R
Robert Elliott 已提交
8666
	h->ioaccel1_blockFetchTable = NULL;
8667 8668
}

8669 8670
/* Allocate ioaccel1 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
8671
{
8672 8673 8674 8675 8676
	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;

8677 8678 8679 8680 8681 8682 8683 8684 8685 8686 8687 8688
	/* 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 =
8689
		kmalloc(((h->ioaccel_maxsg + 1) *
8690 8691 8692 8693 8694 8695 8696 8697 8698 8699 8700
				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:
8701
	hpsa_free_ioaccel1_cmd_and_bft(h);
8702
	return -ENOMEM;
8703 8704
}

8705 8706 8707
/* Free ioaccel2 mode command blocks and block fetch table */
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
8708 8709
	hpsa_free_ioaccel2_sg_chain_blocks(h);

R
Robert Elliott 已提交
8710
	if (h->ioaccel2_cmd_pool) {
8711 8712 8713 8714
		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
8715 8716 8717
		h->ioaccel2_cmd_pool = NULL;
		h->ioaccel2_cmd_pool_dhandle = 0;
	}
8718
	kfree(h->ioaccel2_blockFetchTable);
R
Robert Elliott 已提交
8719
	h->ioaccel2_blockFetchTable = NULL;
8720 8721
}

8722 8723
/* Allocate ioaccel2 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
8724
{
8725 8726
	int rc;

8727 8728 8729 8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745
	/* 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) ||
8746 8747 8748 8749 8750 8751 8752
		(h->ioaccel2_blockFetchTable == NULL)) {
		rc = -ENOMEM;
		goto clean_up;
	}

	rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
	if (rc)
8753 8754 8755 8756 8757 8758 8759
		goto clean_up;

	memset(h->ioaccel2_cmd_pool, 0,
		h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
	return 0;

clean_up:
8760
	hpsa_free_ioaccel2_cmd_and_bft(h);
8761
	return rc;
8762 8763
}

R
Robert Elliott 已提交
8764 8765 8766 8767 8768 8769 8770 8771 8772 8773 8774 8775 8776 8777
/* 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)
8778 8779
{
	u32 trans_support;
8780 8781
	unsigned long transMethod = CFGTBL_Trans_Performant |
					CFGTBL_Trans_use_short_tags;
R
Robert Elliott 已提交
8782
	int i, rc;
8783

8784
	if (hpsa_simple_mode)
R
Robert Elliott 已提交
8785
		return 0;
8786

8787 8788
	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & PERFORMANT_MODE))
R
Robert Elliott 已提交
8789
		return 0;
8790

8791 8792 8793 8794
	/* 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
8795 8796 8797 8798 8799
		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 |
8800
				CFGTBL_Trans_enable_directed_msix;
R
Robert Elliott 已提交
8801 8802 8803
		rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
		if (rc)
			return rc;
8804 8805
	}

8806
	h->nreply_queues = h->msix_vector > 0 ? h->msix_vector : 1;
8807
	hpsa_get_max_perf_mode_cmds(h);
8808
	/* Performant mode ring buffer and supporting data structures */
8809
	h->reply_queue_size = h->max_commands * sizeof(u64);
8810

8811
	for (i = 0; i < h->nreply_queues; i++) {
8812 8813 8814
		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
8815 8816 8817 8818
		if (!h->reply_queue[i].head) {
			rc = -ENOMEM;
			goto clean1;	/* rq, ioaccel */
		}
8819 8820 8821 8822 8823
		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;
	}

8824
	/* Need a block fetch table for performant mode */
8825
	h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
8826
				sizeof(u32)), GFP_KERNEL);
R
Robert Elliott 已提交
8827 8828 8829 8830
	if (!h->blockFetchTable) {
		rc = -ENOMEM;
		goto clean1;	/* rq, ioaccel */
	}
8831

R
Robert Elliott 已提交
8832 8833 8834 8835
	rc = hpsa_enter_performant_mode(h, trans_support);
	if (rc)
		goto clean2;	/* bft, rq, ioaccel */
	return 0;
8836

R
Robert Elliott 已提交
8837
clean2:	/* bft, rq, ioaccel */
8838
	kfree(h->blockFetchTable);
R
Robert Elliott 已提交
8839 8840 8841 8842 8843 8844
	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;
8845 8846
}

8847
static int is_accelerated_cmd(struct CommandList *c)
8848
{
8849 8850 8851 8852 8853 8854
	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;
8855
	int i, accel_cmds_out;
8856
	int refcount;
8857

8858
	do { /* wait for all outstanding ioaccel commands to drain out */
8859
		accel_cmds_out = 0;
8860 8861
		for (i = 0; i < h->nr_cmds; i++) {
			c = h->cmd_pool + i;
8862 8863 8864 8865
			refcount = atomic_inc_return(&c->refcount);
			if (refcount > 1) /* Command is allocated */
				accel_cmds_out += is_accelerated_cmd(c);
			cmd_free(h, c);
8866
		}
8867
		if (accel_cmds_out <= 0)
8868
			break;
8869 8870 8871 8872
		msleep(100);
	} while (1);
}

8873 8874 8875 8876 8877 8878
/*
 *  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)
{
M
Mike Miller 已提交
8879
	return pci_register_driver(&hpsa_pci_driver);
8880 8881 8882 8883 8884 8885 8886
}

static void __exit hpsa_cleanup(void)
{
	pci_unregister_driver(&hpsa_pci_driver);
}

8887 8888
static void __attribute__((unused)) verify_offsets(void)
{
8889 8890 8891 8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902 8903 8904 8905 8906 8907 8908 8909 8910
#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

8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924 8925 8926 8927 8928 8929 8930 8931 8932
#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

8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944 8945 8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957
#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);
8958
	VERIFY_OFFSET(tag, 0x68);
8959 8960 8961 8962 8963 8964
	VERIFY_OFFSET(host_addr, 0x70);
	VERIFY_OFFSET(CISS_LUN, 0x78);
	VERIFY_OFFSET(SG, 0x78 + 8);
#undef VERIFY_OFFSET
}

8965 8966
module_init(hpsa_init);
module_exit(hpsa_cleanup);