hpsa.c 270.0 KB
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/*
 *    Disk Array driver for HP Smart Array SAS controllers
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 *    Copyright 2016 Microsemi Corporation
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 *    Copyright 2014-2015 PMC-Sierra, Inc.
 *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
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 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; version 2 of the License.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
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 *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
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 *
 */

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

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/*
 * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
 * with an optional trailing '-' followed by a byte value (0-255).
 */
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#define HPSA_DRIVER_VERSION "3.4.20-125"
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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");
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MODULE_ALIAS("cciss");
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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, 0x1920},
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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},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103c, 0x1925},
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	{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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	{PCI_VENDOR_ID_COMPAQ,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
		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[] = {
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	{0x40700E11, "Smart Array 5300", &SA5A_access},
	{0x40800E11, "Smart Array 5i", &SA5B_access},
	{0x40820E11, "Smart Array 532", &SA5B_access},
	{0x40830E11, "Smart Array 5312", &SA5B_access},
	{0x409A0E11, "Smart Array 641", &SA5A_access},
	{0x409B0E11, "Smart Array 642", &SA5A_access},
	{0x409C0E11, "Smart Array 6400", &SA5A_access},
	{0x409D0E11, "Smart Array 6400 EM", &SA5A_access},
	{0x40910E11, "Smart Array 6i", &SA5A_access},
	{0x3225103C, "Smart Array P600", &SA5A_access},
	{0x3223103C, "Smart Array P800", &SA5A_access},
	{0x3234103C, "Smart Array P400", &SA5A_access},
	{0x3235103C, "Smart Array P400i", &SA5A_access},
	{0x3211103C, "Smart Array E200i", &SA5A_access},
	{0x3212103C, "Smart Array E200", &SA5A_access},
	{0x3213103C, "Smart Array E200i", &SA5A_access},
	{0x3214103C, "Smart Array E200i", &SA5A_access},
	{0x3215103C, "Smart Array E200i", &SA5A_access},
	{0x3237103C, "Smart Array E500", &SA5A_access},
	{0x323D103C, "Smart Array P700m", &SA5A_access},
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	{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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	{0x1920103C, "Smart Array P430i", &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},
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	{0x1925103C, "Smart Array P831", &SA5_access},
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	{0x1926103C, "Smart Array P731m", &SA5_access},
	{0x1928103C, "Smart Array P230i", &SA5_access},
	{0x1929103C, "Smart Array P530", &SA5_access},
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	{0x21BD103C, "Smart Array P244br", &SA5_access},
	{0x21BE103C, "Smart Array P741m", &SA5_access},
	{0x21BF103C, "Smart HBA H240ar", &SA5_access},
	{0x21C0103C, "Smart Array P440ar", &SA5_access},
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	{0x21C1103C, "Smart Array P840ar", &SA5_access},
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	{0x21C2103C, "Smart Array P440", &SA5_access},
	{0x21C3103C, "Smart Array P441", &SA5_access},
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	{0x21C4103C, "Smart Array", &SA5_access},
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	{0x21C5103C, "Smart Array P841", &SA5_access},
	{0x21C6103C, "Smart HBA H244br", &SA5_access},
	{0x21C7103C, "Smart HBA H240", &SA5_access},
	{0x21C8103C, "Smart HBA H241", &SA5_access},
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	{0x21C9103C, "Smart Array", &SA5_access},
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	{0x21CA103C, "Smart Array P246br", &SA5_access},
	{0x21CB103C, "Smart Array P840", &SA5_access},
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	{0x21CC103C, "Smart Array", &SA5_access},
	{0x21CD103C, "Smart Array", &SA5_access},
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	{0x21CE103C, "Smart HBA", &SA5_access},
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	{0x05809005, "SmartHBA-SA", &SA5_access},
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	{0x05819005, "SmartHBA-SA 8i", &SA5_access},
	{0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
	{0x05839005, "SmartHBA-SA 8e", &SA5_access},
	{0x05849005, "SmartHBA-SA 16i", &SA5_access},
	{0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
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	{0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
	{0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
	{0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
	{0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
	{0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
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	{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};

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

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

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

static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
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static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
					    struct scsi_cmnd *scmd);
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static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
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	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
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	int cmd_type);
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static void hpsa_free_cmd_pool(struct ctlr_info *h);
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#define VPD_PAGE (1 << 8)
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#define HPSA_SIMPLE_ERROR_BITS 0x03
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static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
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static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time);
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static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
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static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
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);
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static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
				bool *legacy_board);
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static int wait_for_device_to_become_ready(struct ctlr_info *h,
					   unsigned char lunaddr[],
					   int reply_queue);
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static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready);
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static inline void finish_cmd(struct CommandList *c);
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static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
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#define BOARD_NOT_READY 0
#define BOARD_READY 1
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static void hpsa_drain_accel_commands(struct ctlr_info *h);
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static void hpsa_flush_cache(struct ctlr_info *h);
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static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
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	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
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static void hpsa_command_resubmit_worker(struct work_struct *work);
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static u32 lockup_detected(struct ctlr_info *h);
static int detect_controller_lockup(struct ctlr_info *h);
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static void hpsa_disable_rld_caching(struct ctlr_info *h);
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static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
	struct ReportExtendedLUNdata *buf, int bufsize);
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static bool hpsa_vpd_page_supported(struct ctlr_info *h,
	unsigned char scsi3addr[], u8 page);
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static int hpsa_luns_changed(struct ctlr_info *h);
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static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
			       struct hpsa_scsi_dev_t *dev,
			       unsigned char *scsi3addr);
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static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
{
	unsigned long *priv = shost_priv(sdev->host);
	return (struct ctlr_info *) *priv;
}

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

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

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

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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;
	}
}

373 374 375
static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
376 377 378 379 380 381 382 383 384 385
	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)
387 388
		return 0;

389
	switch (asc) {
390
	case STATE_CHANGED:
391
		dev_warn(&h->pdev->dev,
392 393
			"%s: a state change detected, command retried\n",
			h->devname);
394 395
		break;
	case LUN_FAILED:
396
		dev_warn(&h->pdev->dev,
397
			"%s: LUN failure detected\n", h->devname);
398 399
		break;
	case REPORT_LUNS_CHANGED:
400
		dev_warn(&h->pdev->dev,
401
			"%s: report LUN data changed\n", h->devname);
402
	/*
403 404
	 * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
	 * target (array) devices.
405 406 407
	 */
		break;
	case POWER_OR_RESET:
408 409 410
		dev_warn(&h->pdev->dev,
			"%s: a power on or device reset detected\n",
			h->devname);
411 412
		break;
	case UNIT_ATTENTION_CLEARED:
413 414 415
		dev_warn(&h->pdev->dev,
			"%s: unit attention cleared by another initiator\n",
			h->devname);
416 417
		break;
	default:
418 419 420
		dev_warn(&h->pdev->dev,
			"%s: unknown unit attention detected\n",
			h->devname);
421 422 423 424 425
		break;
	}
	return 1;
}

426 427 428 429 430 431 432 433 434 435
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;
}

436 437 438 439 440 441 442 443 444 445 446 447 448 449
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);
}

450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
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;
}

474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498
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;
}

499 500 501 502 503 504
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);
505
	h = shost_to_hba(shost);
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	hpsa_scan_start(h->scsi_host);
507 508 509
	return count;
}

510 511 512 513 514 515 516 517 518 519 520 521 522 523 524
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]);
}

525 526 527 528 529 530
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);

531 532
	return snprintf(buf, 20, "%d\n",
			atomic_read(&h->commands_outstanding));
533 534
}

535 536 537 538 539 540 541 542
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",
543
		h->transMethod & CFGTBL_Trans_Performant ?
544 545 546
			"performant" : "simple");
}

547 548 549 550 551 552 553 554 555 556 557
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");
}

558
/* List of controllers which cannot be hard reset on kexec with reset_devices */
559 560
static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
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	0x324b103C, /* Smart Array P711m */
562 563 564 565 566 567 568 569 570 571
	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 */
572
	0x40800E11, /* Smart Array 5i */
573 574
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
575 576 577 578 579 580
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
581 582
};

583 584
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
585
	0x40800E11, /* Smart Array 5i */
586 587 588 589 590 591
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
592 593 594 595 596 597 598 599 600 601 602
	/* 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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603
static int board_id_in_array(u32 a[], int nelems, u32 board_id)
604 605 606
{
	int i;

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	for (i = 0; i < nelems; i++)
		if (a[i] == board_id)
			return 1;
	return 0;
611 612
}

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static int ctlr_is_hard_resettable(u32 board_id)
614
{
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	return !board_id_in_array(unresettable_controller,
			ARRAY_SIZE(unresettable_controller), board_id);
}
618

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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);
623 624
}

625 626 627 628 629 630
static int ctlr_is_resettable(u32 board_id)
{
	return ctlr_is_hard_resettable(board_id) ||
		ctlr_is_soft_resettable(board_id);
}

631 632 633 634 635 636 637
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);
638
	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
639 640
}

641 642 643 644 645
static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
{
	return (scsi3addr[3] & 0xC0) == 0x40;
}

646
static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
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	"1(+0)ADM", "UNKNOWN", "PHYS DRV"
648
};
649 650 651 652 653 654 655
#define HPSA_RAID_0	0
#define HPSA_RAID_4	1
#define HPSA_RAID_1	2	/* also used for RAID 10 */
#define HPSA_RAID_5	3	/* also used for RAID 50 */
#define HPSA_RAID_51	4
#define HPSA_RAID_6	5	/* also used for RAID 60 */
#define HPSA_RAID_ADM	6	/* also used for RAID 1+0 ADM */
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#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
#define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
658

659 660 661 662
static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
{
	return !device->physical_device;
}
663 664 665 666 667

static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
668
	unsigned char rlevel;
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
	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? */
684
	if (!is_logical_device(hdev)) {
685 686 687 688 689 690 691
		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);
692
	if (rlevel > RAID_UNKNOWN)
693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716
		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);
717
	return snprintf(buf, 20, "0x%8phN\n", lunid);
718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
}

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]);
}

748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
static ssize_t sas_address_show(struct device *dev,
	      struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	u64 sas_address;

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

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

771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
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);
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790 791 792 793 794 795

	if (hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC)
		return snprintf(buf, 20, "%d\n", offload_enabled);
	else
		return snprintf(buf, 40, "%s\n",
				"Not applicable for a controller");
796 797
}

798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832
#define MAX_PATHS 8
static ssize_t path_info_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int i;
	int output_len = 0;
	u8 box;
	u8 bay;
	u8 path_map_index = 0;
	char *active;
	unsigned char phys_connector[2];

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

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

833 834 835
		output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len,
				"[%d:%d:%d:%d] %20.20s ",
836 837 838 839
				h->scsi_host->host_no,
				hdev->bus, hdev->target, hdev->lun,
				scsi_device_type(hdev->devtype));

840
		if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
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841
			output_len += scnprintf(buf + output_len,
842 843
						PAGE_SIZE - output_len,
						"%s\n", active);
844 845 846 847 848 849 850 851 852 853
			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';
854
		output_len += scnprintf(buf + output_len,
855
				PAGE_SIZE - output_len,
856 857
				"PORT: %.2s ",
				phys_connector);
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858 859
		if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
			hdev->expose_device) {
860
			if (box == 0 || box == 0xFF) {
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				output_len += scnprintf(buf + output_len,
862
					PAGE_SIZE - output_len,
863 864 865
					"BAY: %hhu %s\n",
					bay, active);
			} else {
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				output_len += scnprintf(buf + output_len,
867
					PAGE_SIZE - output_len,
868 869 870 871
					"BOX: %hhu BAY: %hhu %s\n",
					box, bay, active);
			}
		} else if (box != 0 && box != 0xFF) {
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			output_len += scnprintf(buf + output_len,
873
				PAGE_SIZE - output_len, "BOX: %hhu %s\n",
874 875
				box, active);
		} else
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			output_len += scnprintf(buf + output_len,
877
				PAGE_SIZE - output_len, "%s\n", active);
878 879 880
	}

	spin_unlock_irqrestore(&h->devlock, flags);
881
	return output_len;
882 883
}

884 885 886 887 888 889 890 891 892 893
static ssize_t host_show_ctlr_num(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

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

894 895 896 897 898 899 900 901 902 903
static ssize_t host_show_legacy_board(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%d\n", h->legacy_board ? 1 : 0);
}

904 905 906 907
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);
908
static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
909 910
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
			host_show_hp_ssd_smart_path_enabled, NULL);
911
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
912 913 914
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);
915 916
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
			host_store_raid_offload_debug);
917 918 919 920 921 922
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);
923 924
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
925 926
static DEVICE_ATTR(lockup_detected, S_IRUGO,
	host_show_lockup_detected, NULL);
927 928
static DEVICE_ATTR(ctlr_num, S_IRUGO,
	host_show_ctlr_num, NULL);
929 930
static DEVICE_ATTR(legacy_board, S_IRUGO,
	host_show_legacy_board, NULL);
931 932 933 934 935

static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
936
	&dev_attr_hp_ssd_smart_path_enabled,
937
	&dev_attr_path_info,
938
	&dev_attr_sas_address,
939 940 941 942 943 944 945 946
	NULL,
};

static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
947
	&dev_attr_resettable,
948
	&dev_attr_hp_ssd_smart_path_status,
949
	&dev_attr_raid_offload_debug,
950
	&dev_attr_lockup_detected,
951
	&dev_attr_ctlr_num,
952
	&dev_attr_legacy_board,
953 954 955
	NULL,
};

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956 957
#define HPSA_NRESERVED_CMDS	(HPSA_CMDS_RESERVED_FOR_DRIVER +\
				 HPSA_MAX_CONCURRENT_PASSTHRUS)
958

959 960
static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
961 962
	.name			= HPSA,
	.proc_name		= HPSA,
963 964 965
	.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,
967 968 969 970 971
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
972
	.slave_configure	= hpsa_slave_configure,
973 974 975 976 977 978
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
979
	.max_sectors = 1024,
980
	.no_write_same = 1,
981 982
};

983
static inline u32 next_command(struct ctlr_info *h, u8 q)
984 985
{
	u32 a;
986
	struct reply_queue_buffer *rq = &h->reply_queue[q];
987

988 989 990
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return h->access.command_completed(h, q);

991
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
992
		return h->access.command_completed(h, q);
993

994 995 996
	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
997
		atomic_dec(&h->commands_outstanding);
998 999 1000 1001
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
1002 1003 1004
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
1005 1006 1007 1008
	}
	return a;
}

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
/*
 * 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.
 */

1035 1036
/*
 * set_performant_mode: Modify the tag for cciss performant
1037 1038 1039
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */
1040 1041 1042
#define DEFAULT_REPLY_QUEUE (-1)
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
					int reply_queue)
1043
{
1044
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1045
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1046
		if (unlikely(!h->msix_vectors))
1047 1048
			return;
		if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1049
			c->Header.ReplyQueue =
1050
				raw_smp_processor_id() % h->nreply_queues;
1051 1052
		else
			c->Header.ReplyQueue = reply_queue % h->nreply_queues;
1053
	}
1054 1055
}

1056
static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1057 1058
						struct CommandList *c,
						int reply_queue)
1059 1060 1061
{
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];

1062 1063
	/*
	 * Tell the controller to post the reply to the queue for this
1064 1065
	 * processor.  This seems to give the best I/O throughput.
	 */
1066 1067 1068 1069 1070 1071
	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:
1072 1073 1074 1075 1076 1077 1078 1079
	 *  - 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;
}

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
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];
}

1102
static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1103 1104
						struct CommandList *c,
						int reply_queue)
1105 1106 1107
{
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];

1108 1109
	/*
	 * Tell the controller to post the reply to the queue for this
1110 1111
	 * processor.  This seems to give the best I/O throughput.
	 */
1112 1113 1114 1115 1116 1117
	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:
1118 1119 1120 1121 1122 1123 1124
	 *  - 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]);
}

1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
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)
1137
#define HPSA_EVENT_MONITOR_INTERVAL (15 * HZ)
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
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;
}

1155 1156
static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c, int reply_queue)
1157
{
1158 1159
	dial_down_lockup_detection_during_fw_flash(h, c);
	atomic_inc(&h->commands_outstanding);
1160 1161
	switch (c->cmd_type) {
	case CMD_IOACCEL1:
1162
		set_ioaccel1_performant_mode(h, c, reply_queue);
1163
		writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1164 1165
		break;
	case CMD_IOACCEL2:
1166
		set_ioaccel2_performant_mode(h, c, reply_queue);
1167
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1168
		break;
1169 1170 1171 1172
	case IOACCEL2_TMF:
		set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
		break;
1173
	default:
1174
		set_performant_mode(h, c, reply_queue);
1175
		h->access.submit_command(h, c);
1176
	}
1177 1178
}

1179
static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1180
{
W
Webb Scales 已提交
1181
	if (unlikely(hpsa_is_pending_event(c)))
1182 1183
		return finish_cmd(c);

1184 1185 1186
	__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}

1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
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;
}

1201 1202 1203 1204 1205 1206 1207
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;
1208
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1209

1210
	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1211 1212 1213

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1214
			__set_bit(h->dev[i]->target, lun_taken);
1215 1216
	}

1217 1218 1219 1220 1221 1222
	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
1223 1224 1225 1226
	}
	return !found;
}

D
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1227
static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1228 1229
	struct hpsa_scsi_dev_t *dev, char *description)
{
D
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1230 1231 1232
#define LABEL_SIZE 25
	char label[LABEL_SIZE];

1233 1234 1235
	if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
		return;

D
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1236 1237 1238 1239 1240 1241 1242 1243
	switch (dev->devtype) {
	case TYPE_RAID:
		snprintf(label, LABEL_SIZE, "controller");
		break;
	case TYPE_ENCLOSURE:
		snprintf(label, LABEL_SIZE, "enclosure");
		break;
	case TYPE_DISK:
D
Don Brace 已提交
1244
	case TYPE_ZBC:
D
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1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
		if (dev->external)
			snprintf(label, LABEL_SIZE, "external");
		else if (!is_logical_dev_addr_mode(dev->scsi3addr))
			snprintf(label, LABEL_SIZE, "%s",
				raid_label[PHYSICAL_DRIVE]);
		else
			snprintf(label, LABEL_SIZE, "RAID-%s",
				dev->raid_level > RAID_UNKNOWN ? "?" :
				raid_label[dev->raid_level]);
		break;
	case TYPE_ROM:
		snprintf(label, LABEL_SIZE, "rom");
		break;
	case TYPE_TAPE:
		snprintf(label, LABEL_SIZE, "tape");
		break;
	case TYPE_MEDIUM_CHANGER:
		snprintf(label, LABEL_SIZE, "changer");
		break;
	default:
		snprintf(label, LABEL_SIZE, "UNKNOWN");
		break;
	}

1269
	dev_printk(level, &h->pdev->dev,
D
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1270
			"scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1271 1272 1273 1274 1275
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
			description,
			scsi_device_type(dev->devtype),
			dev->vendor,
			dev->model,
D
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1276
			label,
1277
			dev->offload_config ? '+' : '-',
D
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1278
			dev->offload_to_be_enabled ? '+' : '-',
1279
			dev->expose_device);
1280 1281
}

1282
/* Add an entry into h->dev[] array. */
D
Don Brace 已提交
1283
static int hpsa_scsi_add_entry(struct ctlr_info *h,
1284 1285 1286 1287 1288 1289 1290 1291 1292
		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;

1293
	if (n >= HPSA_MAX_DEVICES) {
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
		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
1306
	 * unit no, zero otherwise.
1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317
	 */
	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
1318
	 * has the same 8 byte LUN address, excepting byte 4 and 5.
1319 1320 1321 1322 1323
	 * 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;
1324
	addr1[5] = 0;
1325 1326 1327 1328
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
1329 1330
		addr2[5] = 0;
		/* differ only in byte 4 and 5? */
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350
		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)++;
1351
	hpsa_show_dev_msg(KERN_INFO, h, device,
1352
		device->expose_device ? "added" : "masked");
1353 1354 1355
	return 0;
}

D
Don Brace 已提交
1356 1357 1358 1359 1360
/*
 * Called during a scan operation.
 *
 * Update an entry in h->dev[] array.
 */
D
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1361
static void hpsa_scsi_update_entry(struct ctlr_info *h,
1362 1363 1364 1365 1366 1367 1368
	int entry, struct hpsa_scsi_dev_t *new_entry)
{
	/* 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;
1369

D
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1370 1371 1372 1373 1374
	/*
	 * ioacccel_handle may have changed for a dual domain disk
	 */
	h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;

1375
	/* Raid offload parameters changed.  Careful about the ordering. */
D
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1376
	if (new_entry->offload_config && new_entry->offload_to_be_enabled) {
1377 1378 1379 1380
		/*
		 * 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
D
Don Brace 已提交
1381
		 * the same as it was before. If raid map data has changed
1382 1383 1384 1385 1386 1387
		 * 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;
	}
D
Don Brace 已提交
1388
	if (new_entry->offload_to_be_enabled) {
1389 1390 1391 1392
		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;
1393
	h->dev[entry]->offload_config = new_entry->offload_config;
1394
	h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1395
	h->dev[entry]->queue_depth = new_entry->queue_depth;
1396

1397 1398
	/*
	 * We can turn off ioaccel offload now, but need to delay turning
D
Don Brace 已提交
1399
	 * ioaccel on until we can update h->dev[entry]->phys_disk[], but we
1400 1401
	 * can't do that until all the devices are updated.
	 */
D
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1402 1403 1404 1405 1406 1407
	h->dev[entry]->offload_to_be_enabled = new_entry->offload_to_be_enabled;

	/*
	 * turn ioaccel off immediately if told to do so.
	 */
	if (!new_entry->offload_to_be_enabled)
1408 1409
		h->dev[entry]->offload_enabled = 0;

1410
	hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1411 1412
}

1413
/* Replace an entry from h->dev[] array. */
D
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1414
static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1415 1416 1417 1418 1419
	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 */
1420
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1421 1422
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432

	/*
	 * 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;
	}

1433 1434 1435
	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
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1437
	hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1438 1439
}

1440
/* Remove an entry from h->dev[] array. */
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1441
static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1442 1443 1444 1445 1446 1447
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

1448
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1449 1450 1451 1452 1453 1454 1455 1456

	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--;
1457
	hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
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 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515
}

#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;
}

1516 1517 1518 1519 1520 1521 1522 1523 1524
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;
1525 1526
	if (dev1->offload_config != dev2->offload_config)
		return 1;
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1527
	if (dev1->offload_to_be_enabled != dev2->offload_to_be_enabled)
1528
		return 1;
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1529 1530 1531
	if (!is_logical_dev_addr_mode(dev1->scsi3addr))
		if (dev1->queue_depth != dev2->queue_depth)
			return 1;
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1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
	/*
	 * This can happen for dual domain devices. An active
	 * path change causes the ioaccel handle to change
	 *
	 * for example note the handle differences between p0 and p1
	 * Device                    WWN               ,WWN hash,Handle
	 * D016 p0|0x3 [02]P2E:01:01,0x5000C5005FC4DACA,0x9B5616,0x01030003
	 *	p1                   0x5000C5005FC4DAC9,0x6798C0,0x00040004
	 */
	if (dev1->ioaccel_handle != dev2->ioaccel_handle)
		return 1;
1543 1544 1545
	return 0;
}

1546 1547 1548
/* 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
1549 1550 1551 1552
 * 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.
1553 1554 1555 1556 1557 1558 1559 1560 1561
 */
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
1562
#define DEVICE_UPDATED 3
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1563 1564 1565
	if (needle == NULL)
		return DEVICE_NOT_FOUND;

1566
	for (i = 0; i < haystack_size; i++) {
1567 1568
		if (haystack[i] == NULL) /* previously removed. */
			continue;
1569 1570
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
1571 1572 1573
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
1574
				return DEVICE_SAME;
1575
			} else {
1576 1577 1578
				/* Keep offline devices offline */
				if (needle->volume_offline)
					return DEVICE_NOT_FOUND;
1579
				return DEVICE_CHANGED;
1580
			}
1581 1582 1583 1584 1585 1586
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}

1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605
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);
1606
	if (!device)
1607
		return;
1608

1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632
	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
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1633 1634 1635 1636 1637 1638
	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;
1639 1640
	case HPSA_LV_UNDERGOING_RPI:
		dev_info(&h->pdev->dev,
S
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1641
			"C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1642 1643 1644 1645 1646
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_RPI:
		dev_info(&h->pdev->dev,
S
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1647 1648 1649
			"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);
1650 1651 1652 1653 1654 1655 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 1693 1694 1695
		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;
	}
}

1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
/*
 * 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
1719 1720
	logical_drive->nphysical_disks = nraid_map_entries;

1721 1722 1723 1724 1725 1726
	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
1727 1728
			if (dev[j] == NULL)
				continue;
1729 1730
			if (dev[j]->devtype != TYPE_DISK &&
			    dev[j]->devtype != TYPE_ZBC)
D
Don Brace 已提交
1731
				continue;
1732
			if (is_logical_device(dev[j]))
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751
				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]) {
D
Don Brace 已提交
1752 1753 1754 1755 1756
			dev_warn(&h->pdev->dev,
				"%s: [%d:%d:%d:%d] A phys disk component of LV is missing, turning off offload_enabled for LV.\n",
				__func__,
				h->scsi_host->host_no, logical_drive->bus,
				logical_drive->target, logical_drive->lun);
1757
			logical_drive->offload_enabled = 0;
1758 1759
			logical_drive->offload_to_be_enabled = 0;
			logical_drive->queue_depth = 8;
1760 1761 1762 1763 1764 1765 1766 1767
		}
	}
	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;
1768 1769 1770 1771 1772 1773
	else {
		if (logical_drive->external)
			logical_drive->queue_depth = EXTERNAL_QD;
		else
			logical_drive->queue_depth = h->nr_cmds;
	}
1774 1775 1776 1777 1778 1779 1780 1781
}

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
1782 1783
		if (dev[i] == NULL)
			continue;
1784 1785
		if (dev[i]->devtype != TYPE_DISK &&
		    dev[i]->devtype != TYPE_ZBC)
D
Don Brace 已提交
1786
			continue;
1787
		if (!is_logical_device(dev[i]))
1788
			continue;
1789 1790 1791 1792

		/*
		 * If offload is currently enabled, the RAID map and
		 * phys_disk[] assignment *better* not be changing
D
Don Brace 已提交
1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
		 * because we would be changing ioaccel phsy_disk[] pointers
		 * on a ioaccel volume processing I/O requests.
		 *
		 * If an ioaccel volume status changed, initially because it was
		 * re-configured and thus underwent a transformation, or
		 * a drive failed, we would have received a state change
		 * request and ioaccel should have been turned off. When the
		 * transformation completes, we get another state change
		 * request to turn ioaccel back on. In this case, we need
		 * to update the ioaccel information.
		 *
		 * Thus: If it is not currently enabled, but will be after
		 * the scan completes, make sure the ioaccel pointers
		 * are up to date.
1807 1808
		 */

D
Don Brace 已提交
1809 1810
		if (!dev[i]->offload_enabled && dev[i]->offload_to_be_enabled)
			hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
1811 1812 1813
	}
}

1814 1815 1816 1817 1818 1819 1820
static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
	int rc = 0;

	if (!h->scsi_host)
		return 1;

K
Kevin Barnett 已提交
1821 1822
	if (is_logical_device(device)) /* RAID */
		rc = scsi_add_device(h->scsi_host, device->bus,
1823
					device->target, device->lun);
K
Kevin Barnett 已提交
1824 1825 1826
	else /* HBA */
		rc = hpsa_add_sas_device(h->sas_host, device);

1827 1828 1829
	return rc;
}

1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
						struct hpsa_scsi_dev_t *dev)
{
	int i;
	int count = 0;

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

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

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

		cmd_free(h, c);
	}

	return count;
}

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

	while (1) {
		cmds = hpsa_find_outstanding_commands_for_dev(h, device);
		if (cmds == 0)
			break;
		if (++waits > 20)
			break;
1868 1869 1870 1871
		msleep(1000);
	}

	if (waits > 20)
1872 1873 1874 1875 1876
		dev_warn(&h->pdev->dev,
			"%s: removing device with %d outstanding commands!\n",
			__func__, cmds);
}

1877 1878 1879 1880 1881 1882 1883 1884
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;

1885 1886 1887 1888 1889 1890
	/*
	 * Allow for commands to drain
	 */
	device->removed = 1;
	hpsa_wait_for_outstanding_commands_for_dev(h, device);

K
Kevin Barnett 已提交
1891 1892
	if (is_logical_device(device)) { /* RAID */
		sdev = scsi_device_lookup(h->scsi_host, device->bus,
1893
						device->target, device->lun);
K
Kevin Barnett 已提交
1894 1895 1896 1897 1898 1899 1900 1901 1902 1903
		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,
1904
					"didn't find device for removal.");
K
Kevin Barnett 已提交
1905
		}
1906 1907
	} else { /* HBA */

K
Kevin Barnett 已提交
1908
		hpsa_remove_sas_device(device);
1909
	}
1910 1911
}

D
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1912
static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924
	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
1925 1926 1927 1928
	/*
	 * A reset can cause a device status to change
	 * re-schedule the scan to see what happened.
	 */
D
Don Brace 已提交
1929
	spin_lock_irqsave(&h->reset_lock, flags);
D
Don Brace 已提交
1930 1931
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
D
Don Brace 已提交
1932
		spin_unlock_irqrestore(&h->reset_lock, flags);
D
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1933 1934
		return;
	}
D
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1935
	spin_unlock_irqrestore(&h->reset_lock, flags);
1936

1937 1938
	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951

	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.
1952 1953
	 * If minor device attributes change, just update
	 * the existing device structure.
1954 1955 1956 1957 1958 1959 1960 1961 1962
	 */
	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
1963
			hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1964 1965 1966
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
D
Don Brace 已提交
1967
			hpsa_scsi_replace_entry(h, i, sd[entry],
1968
				added, &nadded, removed, &nremoved);
1969 1970 1971 1972
			/* Set it to NULL to prevent it from being freed
			 * at the bottom of hpsa_update_scsi_devices()
			 */
			sd[entry] = NULL;
1973
		} else if (device_change == DEVICE_UPDATED) {
D
Don Brace 已提交
1974
			hpsa_scsi_update_entry(h, i, sd[entry]);
1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
		}
		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;
1986 1987 1988 1989 1990 1991 1992 1993

		/* 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]);
1994
			hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1995 1996 1997
			continue;
		}

1998 1999 2000 2001
		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
2002
			if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
				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 */
		}
	}
2013 2014
	hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);

D
Don Brace 已提交
2015 2016
	/*
	 * Now that h->dev[]->phys_disk[] is coherent, we can enable
2017
	 * any logical drives that need it enabled.
D
Don Brace 已提交
2018 2019 2020 2021
	 *
	 * The raid map should be current by now.
	 *
	 * We are updating the device list used for I/O requests.
2022
	 */
D
Don Brace 已提交
2023 2024 2025
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == NULL)
			continue;
2026
		h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
D
Don Brace 已提交
2027
	}
2028

2029 2030
	spin_unlock_irqrestore(&h->devlock, flags);

2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041
	/* 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);
	}

2042 2043 2044 2045
	/* 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
2046
	if (!changes)
2047 2048 2049 2050
		goto free_and_out;

	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
D
Don Brace 已提交
2051 2052
		if (removed[i] == NULL)
			continue;
2053 2054
		if (removed[i]->expose_device)
			hpsa_remove_device(h, removed[i]);
2055 2056 2057 2058 2059 2060
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
2061 2062
		int rc = 0;

D
Don Brace 已提交
2063 2064
		if (added[i] == NULL)
			continue;
2065
		if (!(added[i]->expose_device))
2066
			continue;
2067 2068
		rc = hpsa_add_device(h, added[i]);
		if (!rc)
2069
			continue;
2070 2071
		dev_warn(&h->pdev->dev,
			"addition failed %d, device not added.", rc);
2072 2073 2074 2075
		/* 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
2076
		h->drv_req_rescan = 1;
2077 2078 2079 2080 2081 2082 2083 2084
	}

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

/*
2085
 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103
 * 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)
{
2104
	struct hpsa_scsi_dev_t *sd = NULL;
2105 2106 2107 2108 2109
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
K
Kevin Barnett 已提交
2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120
	if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
		struct scsi_target *starget;
		struct sas_rphy *rphy;

		starget = scsi_target(sdev);
		rphy = target_to_rphy(starget);
		sd = hpsa_find_device_by_sas_rphy(h, rphy);
		if (sd) {
			sd->target = sdev_id(sdev);
			sd->lun = sdev->lun;
		}
2121 2122
	}
	if (!sd)
K
Kevin Barnett 已提交
2123 2124 2125 2126
		sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
					sdev_id(sdev), sdev->lun);

	if (sd && sd->expose_device) {
2127
		atomic_set(&sd->ioaccel_cmds_out, 0);
K
Kevin Barnett 已提交
2128
		sdev->hostdata = sd;
2129 2130
	} else
		sdev->hostdata = NULL;
2131 2132 2133 2134
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}

2135 2136 2137 2138 2139 2140 2141
/* 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;
2142
	sdev->no_uld_attach = !sd || !sd->expose_device;
2143

2144 2145 2146 2147 2148 2149 2150
	if (sd) {
		if (sd->external)
			queue_depth = EXTERNAL_QD;
		else
			queue_depth = sd->queue_depth != 0 ?
					sd->queue_depth : sdev->host->can_queue;
	} else
2151 2152 2153 2154 2155 2156 2157
		queue_depth = sdev->host->can_queue;

	scsi_change_queue_depth(sdev, queue_depth);

	return 0;
}

2158 2159
static void hpsa_slave_destroy(struct scsi_device *sdev)
{
2160
	/* nothing to do. */
2161 2162
}

2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202
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;
}

2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216
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
2217
static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2218 2219 2220 2221 2222 2223 2224 2225
{
	int i;

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

	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
				GFP_KERNEL);
2226
	if (!h->cmd_sg_list)
2227
		return -ENOMEM;
2228

2229 2230 2231
	for (i = 0; i < h->nr_cmds; i++) {
		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
						h->chainsize, GFP_KERNEL);
2232
		if (!h->cmd_sg_list[i])
2233
			goto clean;
2234

2235 2236 2237 2238 2239 2240 2241 2242
	}
	return 0;

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

2243 2244 2245 2246 2247 2248 2249 2250
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
2251
	chain_size = le32_to_cpu(cp->sg[0].length);
2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
	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
2272
	chain_size = le32_to_cpu(cp->sg[0].length);
2273 2274 2275
	pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}

2276
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2277 2278 2279 2280
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;
2281
	u32 chain_len;
2282 2283 2284

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
2285 2286
	chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
	chain_len = sizeof(*chain_sg) *
D
Don Brace 已提交
2287
		(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2288 2289
	chain_sg->Len = cpu_to_le32(chain_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_len,
2290
				PCI_DMA_TODEVICE);
2291 2292
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
2293
		chain_sg->Addr = cpu_to_le64(0);
2294 2295
		return -1;
	}
2296
	chain_sg->Addr = cpu_to_le64(temp64);
2297
	return 0;
2298 2299 2300 2301 2302 2303 2304
}

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

2305
	if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2306 2307 2308
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2309 2310
	pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
			le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
2311 2312
}

2313 2314 2315 2316 2317 2318

/* 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,
2319 2320
					struct CommandList *c,
					struct scsi_cmnd *cmd,
2321 2322
					struct io_accel2_cmd *c2,
					struct hpsa_scsi_dev_t *dev)
2323 2324
{
	int data_len;
2325
	int retry = 0;
2326
	u32 ioaccel2_resid = 0;
2327 2328 2329 2330 2331 2332 2333

	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:
2334
			cmd->result |= SAM_STAT_CHECK_CONDITION;
2335
			if (c2->error_data.data_present !=
2336 2337 2338
					IOACCEL2_SENSE_DATA_PRESENT) {
				memset(cmd->sense_buffer, 0,
					SCSI_SENSE_BUFFERSIZE);
2339
				break;
2340
			}
2341 2342 2343 2344 2345 2346 2347 2348 2349
			/* 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);
2350
			retry = 1;
2351 2352
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2353
			retry = 1;
2354 2355
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2356
			retry = 1;
2357 2358
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2359
			retry = 1;
2360 2361
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2362
			retry = 1;
2363 2364
			break;
		default:
2365
			retry = 1;
2366 2367 2368 2369
			break;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_FAILURE:
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385
		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:
2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406
			/*
			 * Did an HBA disk disappear? We will eventually
			 * get a state change event from the controller but
			 * in the meantime, we need to tell the OS that the
			 * HBA disk is no longer there and stop I/O
			 * from going down. This allows the potential re-insert
			 * of the disk to get the same device node.
			 */
			if (dev->physical_device && dev->expose_device) {
				cmd->result = DID_NO_CONNECT << 16;
				dev->removed = 1;
				h->drv_req_rescan = 1;
				dev_warn(&h->pdev->dev,
					"%s: device is gone!\n", __func__);
			} else
				/*
				 * Retry by sending down the RAID path.
				 * We will get an event from ctlr to
				 * trigger rescan regardless.
				 */
				retry = 1;
2407 2408 2409 2410
			break;
		default:
			retry = 1;
		}
2411 2412 2413 2414 2415 2416
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2417
		retry = 1;
2418 2419 2420 2421
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		break;
	default:
2422
		retry = 1;
2423 2424
		break;
	}
2425 2426

	return retry;	/* retry on raid path? */
2427 2428
}

2429 2430 2431
static void hpsa_cmd_resolve_events(struct ctlr_info *h,
		struct CommandList *c)
{
W
Webb Scales 已提交
2432 2433
	bool do_wake = false;

2434
	/*
D
Don Brace 已提交
2435
	 * Reset c->scsi_cmd here so that the reset handler will know
W
Webb Scales 已提交
2436
	 * this command has completed.  Then, check to see if the handler is
2437 2438 2439
	 * waiting for this command, and, if so, wake it.
	 */
	c->scsi_cmd = SCSI_CMD_IDLE;
W
Webb Scales 已提交
2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
	mb();	/* Declare command idle before checking for pending events. */
	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);
2460 2461
}

2462 2463 2464 2465 2466 2467 2468
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);
}

2469 2470 2471
static void hpsa_cmd_free_and_done(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd)
{
2472
	hpsa_cmd_resolve_and_free(h, c);
2473 2474
	if (cmd && cmd->scsi_done)
		cmd->scsi_done(cmd);
2475 2476 2477 2478 2479 2480 2481 2482
}

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);
}

2483 2484 2485 2486 2487 2488 2489 2490
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 &&
2491 2492
			c2->error_data.status == 0))
		return hpsa_cmd_free_and_done(h, c, cmd);
2493

2494 2495
	/*
	 * Any RAID offload error results in retry which will use
D
Don Brace 已提交
2496
	 * the normal I/O path so the controller can handle whatever is
2497 2498
	 * wrong.
	 */
2499
	if (is_logical_device(dev) &&
2500 2501
		c2->error_data.serv_response ==
			IOACCEL2_SERV_RESPONSE_FAILURE) {
2502
		if (c2->error_data.status ==
2503
			IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2504
			dev->offload_enabled = 0;
2505 2506
			dev->offload_to_be_enabled = 0;
		}
2507 2508

		return hpsa_retry_cmd(h, c);
2509
	}
2510

2511
	if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2512
		return hpsa_retry_cmd(h, c);
2513

2514
	return hpsa_cmd_free_and_done(h, c, cmd);
2515 2516
}

2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544
/* 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;
}

2545
static void complete_scsi_command(struct CommandList *cp)
2546 2547 2548 2549
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;
2550
	struct hpsa_scsi_dev_t *dev;
2551
	struct io_accel2_cmd *c2;
2552

2553 2554 2555
	u8 sense_key;
	u8 asc;      /* additional sense code */
	u8 ascq;     /* additional sense code qualifier */
2556
	unsigned long sense_data_size;
2557 2558

	ei = cp->err_info;
2559
	cmd = cp->scsi_cmd;
2560
	h = cp->h;
2561 2562 2563 2564 2565 2566

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

2567
	dev = cmd->device->hostdata;
2568 2569 2570 2571
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}
2572
	c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2573 2574

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
2575
	if ((cp->cmd_type == CMD_SCSI) &&
D
Don Brace 已提交
2576
		(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2577
		hpsa_unmap_sg_chain_block(h, cp);
2578

2579 2580 2581 2582
	if ((cp->cmd_type == CMD_IOACCEL2) &&
		(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
		hpsa_unmap_ioaccel2_sg_chain_block(h, c2);

2583 2584
	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
2585

2586 2587 2588 2589 2590 2591 2592 2593 2594
	if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
		if (dev->physical_device && dev->expose_device &&
			dev->removed) {
			cmd->result = DID_NO_CONNECT << 16;
			return hpsa_cmd_free_and_done(h, cp, cmd);
		}
		if (likely(cp->phys_disk != NULL))
			atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
	}
2595

2596 2597 2598 2599 2600 2601 2602 2603
	/*
	 * 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;
2604
		return hpsa_cmd_free_and_done(h, cp, cmd);
2605 2606
	}

D
Don Brace 已提交
2607
	if ((unlikely(hpsa_is_pending_event(cp))))
W
Webb Scales 已提交
2608
		if (cp->reset_pending)
D
Don Brace 已提交
2609
			return hpsa_cmd_free_and_done(h, cp, cmd);
W
Webb Scales 已提交
2610

2611 2612 2613
	if (cp->cmd_type == CMD_IOACCEL2)
		return process_ioaccel2_completion(h, cp, cmd, dev);

2614
	scsi_set_resid(cmd, ei->ResidualCnt);
2615 2616
	if (ei->CommandStatus == 0)
		return hpsa_cmd_free_and_done(h, cp, cmd);
2617

2618 2619 2620 2621 2622
	/* 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
2623 2624 2625 2626
		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;
2627
		cp->Header.tag = c->tag;
2628 2629
		memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
		memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2630 2631 2632 2633 2634

		/* Any RAID offload error results in retry which will use
		 * the normal I/O path so the controller can handle whatever's
		 * wrong.
		 */
2635
		if (is_logical_device(dev)) {
2636 2637
			if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
				dev->offload_enabled = 0;
W
Webb Scales 已提交
2638
			return hpsa_retry_cmd(h, cp);
2639
		}
2640 2641
	}

2642 2643 2644 2645
	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657
		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);
2658
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2659
			if (sense_key == ABORTED_COMMAND) {
2660
				cmd->result |= DID_SOFT_ERROR << 16;
2661 2662
				break;
			}
2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697
			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:
2698 2699
		dev_warn(&h->pdev->dev,
			"CDB %16phN data overrun\n", cp->Request.CDB);
2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713
		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:
2714
		cmd->result = DID_ERROR << 16;
2715 2716
		dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
				cp->Request.CDB);
2717 2718 2719
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
2720 2721
		dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
			cp->Request.CDB);
2722 2723 2724
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
2725 2726
		dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
			cp->Request.CDB);
2727 2728
		break;
	case CMD_ABORTED:
D
Don Brace 已提交
2729 2730
		cmd->result = DID_ABORT << 16;
		break;
2731 2732
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
2733 2734
		dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
			cp->Request.CDB);
2735 2736
		break;
	case CMD_UNSOLICITED_ABORT:
2737
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2738 2739
		dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
			cp->Request.CDB);
2740 2741 2742
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
2743 2744
		dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
			cp->Request.CDB);
2745
		break;
2746 2747 2748 2749
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
2750 2751 2752 2753
	case CMD_TMF_STATUS:
		if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
			cmd->result = DID_ERROR << 16;
		break;
2754 2755 2756 2757 2758 2759 2760 2761
	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;
2762 2763 2764 2765 2766
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}
2767 2768

	return hpsa_cmd_free_and_done(h, cp, cmd);
2769 2770 2771 2772 2773 2774 2775
}

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

2776 2777 2778 2779
	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);
2780 2781
}

2782
static int hpsa_map_one(struct pci_dev *pdev,
2783 2784 2785 2786 2787
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
2788
	u64 addr64;
2789 2790 2791

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
2792
		cp->Header.SGTotal = cpu_to_le16(0);
2793
		return 0;
2794 2795
	}

2796
	addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2797
	if (dma_mapping_error(&pdev->dev, addr64)) {
2798
		/* Prevent subsequent unmap of something never mapped */
2799
		cp->Header.SGList = 0;
2800
		cp->Header.SGTotal = cpu_to_le16(0);
2801
		return -1;
2802
	}
2803 2804 2805 2806 2807
	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 */
2808
	return 0;
2809 2810
}

2811 2812 2813 2814
#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)
2815 2816 2817 2818
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840
	__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);
2841 2842
}

2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854
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;
}

2855
#define MAX_DRIVER_CMD_RETRIES 25
2856 2857
static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2858
{
2859
	int backoff_time = 10, retry_count = 0;
2860
	int rc;
2861 2862

	do {
2863
		memset(c->err_info, 0, sizeof(*c->err_info));
2864 2865 2866 2867
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						  timeout_msecs);
		if (rc)
			break;
2868
		retry_count++;
2869 2870 2871 2872 2873
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
2874
	} while ((check_for_unit_attention(h, c) ||
2875 2876
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
2877
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2878 2879 2880
	if (retry_count > MAX_DRIVER_CMD_RETRIES)
		rc = -EIO;
	return rc;
2881 2882
}

2883 2884
static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
				struct CommandList *c)
2885
{
2886 2887 2888
	const u8 *cdb = c->Request.CDB;
	const u8 *lun = c->Header.LUN.LunAddrBytes;

2889 2890
	dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
		 txt, lun, cdb);
2891 2892 2893 2894 2895 2896
}

static void hpsa_scsi_interpret_error(struct ctlr_info *h,
			struct CommandList *cp)
{
	const struct ErrorInfo *ei = cp->err_info;
2897
	struct device *d = &cp->h->pdev->dev;
2898 2899
	u8 sense_key, asc, ascq;
	int sense_len;
2900 2901 2902

	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
2903 2904 2905 2906 2907 2908
		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);
2909 2910
		hpsa_print_cmd(h, "SCSI status", cp);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2911 2912
			dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
				sense_key, asc, ascq);
2913
		else
2914
			dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2915 2916 2917 2918 2919 2920 2921 2922 2923
		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:
2924
		hpsa_print_cmd(h, "overrun condition", cp);
2925 2926 2927 2928 2929
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
		 * to non-existent targets as invalid commands.
		 */
2930 2931
		hpsa_print_cmd(h, "invalid command", cp);
		dev_warn(d, "probably means device no longer present\n");
2932 2933 2934
		}
		break;
	case CMD_PROTOCOL_ERR:
2935
		hpsa_print_cmd(h, "protocol error", cp);
2936 2937
		break;
	case CMD_HARDWARE_ERR:
2938
		hpsa_print_cmd(h, "hardware error", cp);
2939 2940
		break;
	case CMD_CONNECTION_LOST:
2941
		hpsa_print_cmd(h, "connection lost", cp);
2942 2943
		break;
	case CMD_ABORTED:
2944
		hpsa_print_cmd(h, "aborted", cp);
2945 2946
		break;
	case CMD_ABORT_FAILED:
2947
		hpsa_print_cmd(h, "abort failed", cp);
2948 2949
		break;
	case CMD_UNSOLICITED_ABORT:
2950
		hpsa_print_cmd(h, "unsolicited abort", cp);
2951 2952
		break;
	case CMD_TIMEOUT:
2953
		hpsa_print_cmd(h, "timed out", cp);
2954
		break;
2955
	case CMD_UNABORTABLE:
2956
		hpsa_print_cmd(h, "unabortable", cp);
2957
		break;
2958 2959 2960
	case CMD_CTLR_LOCKUP:
		hpsa_print_cmd(h, "controller lockup detected", cp);
		break;
2961
	default:
2962 2963
		hpsa_print_cmd(h, "unknown status", cp);
		dev_warn(d, "Unknown command status %x\n",
2964 2965 2966 2967
				ei->CommandStatus);
	}
}

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 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018
static int hpsa_do_receive_diagnostic(struct ctlr_info *h, u8 *scsi3addr,
					u8 page, u8 *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);
	if (fill_cmd(c, RECEIVE_DIAGNOSTIC, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
		PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

static u64 hpsa_get_enclosure_logical_identifier(struct ctlr_info *h,
						u8 *scsi3addr)
{
	u8 *buf;
	u64 sa = 0;
	int rc = 0;

	buf = kzalloc(1024, GFP_KERNEL);
	if (!buf)
		return 0;

	rc = hpsa_do_receive_diagnostic(h, scsi3addr, RECEIVE_DIAGNOSTIC,
					buf, 1024);

	if (rc)
		goto out;

	sa = get_unaligned_be64(buf+12);

out:
	kfree(buf);
	return sa;
}

3019
static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
3020
			u16 page, unsigned char *buf,
3021 3022 3023 3024 3025 3026
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

3027
	c = cmd_alloc(h);
3028

3029 3030 3031 3032 3033
	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
3034
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3035
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
3036 3037
	if (rc)
		goto out;
3038 3039
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3040
		hpsa_scsi_interpret_error(h, c);
3041 3042
		rc = -1;
	}
3043
out:
3044
	cmd_free(h, c);
3045 3046 3047
	return rc;
}

3048
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
3049
	u8 reset_type, int reply_queue)
3050 3051 3052 3053 3054
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

3055
	c = cmd_alloc(h);
3056 3057


3058
	/* fill_cmd can't fail here, no data buffer to map. */
S
Scott Teel 已提交
3059
	(void) fill_cmd(c, reset_type, h, NULL, 0, 0,
3060
			scsi3addr, TYPE_MSG);
3061
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
3062 3063 3064 3065
	if (rc) {
		dev_warn(&h->pdev->dev, "Failed to send reset command\n");
		goto out;
	}
3066 3067 3068 3069
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
3070
		hpsa_scsi_interpret_error(h, c);
3071 3072
		rc = -1;
	}
3073
out:
3074
	cmd_free(h, c);
3075 3076 3077
	return rc;
}

W
Webb Scales 已提交
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 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182
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
3183 3184 3185 3186
		dev_warn(&h->pdev->dev,
			 "Controller lockup detected during reset wait\n");
		rc = -ENODEV;
	}
W
Webb Scales 已提交
3187 3188 3189

	if (unlikely(rc))
		atomic_set(&dev->reset_cmds_out, 0);
D
Don Brace 已提交
3190
	else
D
Don Brace 已提交
3191
		rc = wait_for_device_to_become_ready(h, scsi3addr, 0);
W
Webb Scales 已提交
3192 3193 3194 3195 3196

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

3197 3198 3199 3200 3201 3202 3203 3204 3205 3206
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;
3207 3208 3209 3210 3211 3212 3213 3214

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

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

3215 3216 3217 3218
	if (rc == 0)
		*raid_level = buf[8];
	if (*raid_level > RAID_UNKNOWN)
		*raid_level = RAID_UNKNOWN;
3219
exit:
3220 3221 3222 3223
	kfree(buf);
	return;
}

3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235
#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;

3236 3237 3238 3239
	/* Show details only if debugging has been activated. */
	if (h->raid_offload_debug < 2)
		return;

3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263
	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
3264
	dev_info(&h->pdev->dev, "flags = 0x%x\n",
3265
			le16_to_cpu(map_buff->flags));
3266
	dev_info(&h->pdev->dev, "encryption = %s\n",
D
Don Brace 已提交
3267 3268
			le16_to_cpu(map_buff->flags) &
			RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3269 3270
	dev_info(&h->pdev->dev, "dekindex = %u\n",
			le16_to_cpu(map_buff->dekindex));
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308
	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;

3309
	c = cmd_alloc(h);
3310

3311 3312 3313
	if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
			sizeof(this_device->raid_map), 0,
			scsi3addr, TYPE_CMD)) {
3314 3315 3316
		dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
		cmd_free(h, c);
		return -1;
3317
	}
3318
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3319
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
3320 3321
	if (rc)
		goto out;
3322 3323
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3324
		hpsa_scsi_interpret_error(h, c);
3325 3326
		rc = -1;
		goto out;
3327
	}
3328
	cmd_free(h, c);
3329 3330 3331 3332 3333 3334 3335 3336 3337

	/* @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;
3338 3339 3340
out:
	cmd_free(h, c);
	return rc;
3341 3342
}

K
Kevin Barnett 已提交
3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361
static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
		unsigned char scsi3addr[], u16 bmic_device_index,
		struct bmic_sense_subsystem_info *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);

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

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

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3362
				PCI_DMA_FROMDEVICE, NO_TIMEOUT);
K
Kevin Barnett 已提交
3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

S
Scott Teel 已提交
3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389
static int hpsa_bmic_id_controller(struct ctlr_info *h,
	struct bmic_identify_controller *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);

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

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3390
		PCI_DMA_FROMDEVICE, NO_TIMEOUT);
S
Scott Teel 已提交
3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419
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;

3420
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3421
						NO_TIMEOUT);
3422 3423 3424 3425 3426 3427 3428
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
K
Kevin Barnett 已提交
3429

3430 3431 3432
	return rc;
}

3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453
/*
 * get enclosure information
 * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
 * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
 * Uses id_physical_device to determine the box_index.
 */
static void hpsa_get_enclosure_info(struct ctlr_info *h,
			unsigned char *scsi3addr,
			struct ReportExtendedLUNdata *rlep, int rle_index,
			struct hpsa_scsi_dev_t *encl_dev)
{
	int rc = -1;
	struct CommandList *c = NULL;
	struct ErrorInfo *ei = NULL;
	struct bmic_sense_storage_box_params *bssbp = NULL;
	struct bmic_identify_physical_device *id_phys = NULL;
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
	u16 bmic_device_index = 0;

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

3454 3455 3456
	encl_dev->sas_address =
		hpsa_get_enclosure_logical_identifier(h, scsi3addr);

3457 3458 3459 3460 3461
	if (encl_dev->target == -1 || encl_dev->lun == -1) {
		rc = IO_OK;
		goto out;
	}

3462 3463
	if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
		rc = IO_OK;
3464
		goto out;
3465
	}
3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496

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

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

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

	c = cmd_alloc(h);

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

	if (rc)
		goto out;

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

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3497
						NO_TIMEOUT);
3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523
	if (rc)
		goto out;

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

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

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

	if (c)
		cmd_free(h, c);

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

K
Kevin Barnett 已提交
3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563
static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
						unsigned char *scsi3addr)
{
	struct ReportExtendedLUNdata *physdev;
	u32 nphysicals;
	u64 sa = 0;
	int i;

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

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

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

	kfree(physdev);

	return sa;
}

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

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

		ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
3564
		if (!ssi)
K
Kevin Barnett 已提交
3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580
			return;

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

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

	dev->sas_address = sa;
}

3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604
static void hpsa_ext_ctrl_present(struct ctlr_info *h,
	struct ReportExtendedLUNdata *physdev)
{
	u32 nphysicals;
	int i;

	if (h->discovery_polling)
		return;

	nphysicals = (get_unaligned_be32(physdev->LUNListLength) / 24) + 1;

	for (i = 0; i < nphysicals; i++) {
		if (physdev->LUN[i].device_type ==
			BMIC_DEVICE_TYPE_CONTROLLER
			&& !is_hba_lunid(physdev->LUN[i].lunid)) {
			dev_info(&h->pdev->dev,
				"External controller present, activate discovery polling and disable rld caching\n");
			hpsa_disable_rld_caching(h);
			h->discovery_polling = 1;
			break;
		}
	}
}

K
Kevin Barnett 已提交
3605
/* Get a device id from inquiry page 0x83 */
3606
static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3607 3608 3609 3610 3611 3612 3613 3614 3615
	unsigned char scsi3addr[], u8 page)
{
	int rc;
	int i;
	int pages;
	unsigned char *buf, bufsize;

	buf = kzalloc(256, GFP_KERNEL);
	if (!buf)
3616
		return false;
3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642

	/* 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);
3643
	return false;
3644 3645
exit_supported:
	kfree(buf);
3646
	return true;
3647 3648
}

D
Don Brace 已提交
3649 3650 3651 3652 3653 3654 3655
/*
 * Called during a scan operation.
 * Sets ioaccel status on the new device list, not the existing device list
 *
 * The device list used during I/O will be updated later in
 * adjust_hpsa_scsi_table.
 */
3656 3657 3658 3659 3660 3661 3662 3663 3664
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;
3665
	this_device->offload_to_be_enabled = 0;
3666 3667 3668 3669

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
3670 3671
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
		goto out;
3672
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3673
			VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3674 3675 3676 3677 3678 3679 3680 3681 3682 3683
	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) {
D
Don Brace 已提交
3684
		this_device->offload_to_be_enabled =
3685 3686
			!!(ioaccel_status & OFFLOAD_ENABLED_BIT);
		if (hpsa_get_raid_map(h, scsi3addr, this_device))
D
Don Brace 已提交
3687
			this_device->offload_to_be_enabled = 0;
3688
	}
D
Don Brace 已提交
3689

3690 3691 3692 3693 3694
out:
	kfree(buf);
	return;
}

3695 3696
/* 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
3697
	unsigned char *device_id, int index, int buflen)
3698 3699 3700 3701
{
	int rc;
	unsigned char *buf;

3702 3703 3704 3705
	/* Does controller have VPD for device id? */
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
		return 1; /* not supported */

3706 3707
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
3708
		return -ENOMEM;
3709 3710 3711 3712 3713 3714 3715 3716

	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
					HPSA_VPD_LV_DEVICE_ID, buf, 64);
	if (rc == 0) {
		if (buflen > 16)
			buflen = 16;
		memcpy(device_id, &buf[8], buflen);
	}
D
Don Brace 已提交
3717

3718
	kfree(buf);
D
Don Brace 已提交
3719

3720
	return rc; /*0 - got id,  otherwise, didn't */
3721 3722 3723
}

static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3724
		void *buf, int bufsize,
3725 3726 3727 3728 3729 3730 3731
		int extended_response)
{
	int rc = IO_OK;
	struct CommandList *c;
	unsigned char scsi3addr[8];
	struct ErrorInfo *ei;

3732
	c = cmd_alloc(h);
3733

3734 3735
	/* address the controller */
	memset(scsi3addr, 0, sizeof(scsi3addr));
3736 3737
	if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
		buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
3738
		rc = -EAGAIN;
3739 3740
		goto out;
	}
3741 3742
	if (extended_response)
		c->Request.CDB[1] = extended_response;
3743
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3744
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
3745 3746
	if (rc)
		goto out;
3747 3748 3749
	ei = c->err_info;
	if (ei->CommandStatus != 0 &&
	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
3750
		hpsa_scsi_interpret_error(h, c);
3751
		rc = -EIO;
3752
	} else {
3753 3754 3755
		struct ReportLUNdata *rld = buf;

		if (rld->extended_response_flag != extended_response) {
3756 3757 3758 3759 3760 3761 3762 3763
			if (!h->legacy_board) {
				dev_err(&h->pdev->dev,
					"report luns requested format %u, got %u\n",
					extended_response,
					rld->extended_response_flag);
				rc = -EINVAL;
			} else
				rc = -EOPNOTSUPP;
3764
		}
3765
	}
3766
out:
3767
	cmd_free(h, c);
3768 3769 3770 3771
	return rc;
}

static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3772
		struct ReportExtendedLUNdata *buf, int bufsize)
3773
{
3774 3775 3776 3777 3778
	int rc;
	struct ReportLUNdata *lbuf;

	rc = hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
				      HPSA_REPORT_PHYS_EXTENDED);
3779
	if (!rc || rc != -EOPNOTSUPP)
3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799
		return rc;

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

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

		/* Copy ReportLUNdata header */
		memcpy(buf, lbuf, 8);
		nphys = be32_to_cpu(*((__be32 *)lbuf->LUNListLength)) / 8;
		for (i = 0; i < nphys; i++)
			memcpy(buf->LUN[i].lunid, lbuf->LUN[i], 8);
	}
	kfree(lbuf);
	return rc;
3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815
}

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;
}

3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829
/* 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? */
3830
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3831 3832 3833 3834 3835
		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);
3836
	if (rc != 0)
3837 3838 3839 3840 3841 3842
		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);
3843
	if (rc != 0)
3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856
		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)
3857
 *  0xff (offline for unknown reasons)
3858 3859 3860
 *  # (integer code indicating one of several NOT READY states
 *     describing why a volume is to be kept offline)
 */
3861
static unsigned char hpsa_volume_offline(struct ctlr_info *h,
3862 3863 3864
					unsigned char scsi3addr[])
{
	struct CommandList *c;
3865 3866 3867
	unsigned char *sense;
	u8 sense_key, asc, ascq;
	int sense_len;
3868
	int rc, ldstat = 0;
3869 3870 3871 3872 3873 3874 3875
	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);
3876

3877
	(void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3878
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3879
					NO_TIMEOUT);
3880 3881
	if (rc) {
		cmd_free(h, c);
3882
		return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3883
	}
3884
	sense = c->err_info->SenseInfo;
3885 3886 3887 3888 3889
	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);
3890 3891 3892 3893 3894 3895 3896 3897 3898
	cmd_status = c->err_info->CommandStatus;
	scsi_status = c->err_info->ScsiStatus;
	cmd_free(h, c);

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

	/* Keep volume offline in certain cases: */
	switch (ldstat) {
3899
	case HPSA_LV_FAILED:
3900
	case HPSA_LV_UNDERGOING_ERASE:
S
Scott Benesh 已提交
3901
	case HPSA_LV_NOT_AVAILABLE:
3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920
	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;
	}
3921
	return HPSA_LV_OK;
3922 3923
}

3924
static int hpsa_update_device_info(struct ctlr_info *h,
3925 3926
	unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
	unsigned char *is_OBDR_device)
3927
{
3928 3929 3930 3931 3932 3933

#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)

3934
	unsigned char *inq_buff;
3935
	unsigned char *obdr_sig;
3936
	int rc = 0;
3937

3938
	inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3939 3940
	if (!inq_buff) {
		rc = -ENOMEM;
3941
		goto bail_out;
3942
	}
3943 3944 3945 3946 3947

	/* 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) {
		dev_err(&h->pdev->dev,
3948 3949 3950
			"%s: inquiry failed, device will be skipped.\n",
			__func__);
		rc = HPSA_INQUIRY_FAILED;
3951 3952 3953
		goto bail_out;
	}

3954 3955
	scsi_sanitize_inquiry_string(&inq_buff[8], 8);
	scsi_sanitize_inquiry_string(&inq_buff[16], 16);
D
Don Brace 已提交
3956

3957 3958 3959 3960 3961 3962
	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));
3963
	this_device->rev = inq_buff[2];
3964 3965
	memset(this_device->device_id, 0,
		sizeof(this_device->device_id));
3966
	if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3967
		sizeof(this_device->device_id)) < 0)
3968 3969 3970 3971 3972 3973 3974
		dev_err(&h->pdev->dev,
			"hpsa%d: %s: can't get device id for host %d:C0:T%d:L%d\t%s\t%.16s\n",
			h->ctlr, __func__,
			h->scsi_host->host_no,
			this_device->target, this_device->lun,
			scsi_device_type(this_device->devtype),
			this_device->model);
3975

D
Don Brace 已提交
3976 3977
	if ((this_device->devtype == TYPE_DISK ||
		this_device->devtype == TYPE_ZBC) &&
3978
		is_logical_dev_addr_mode(scsi3addr)) {
3979
		unsigned char volume_offline;
3980

3981
		hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3982 3983
		if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
			hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3984
		volume_offline = hpsa_volume_offline(h, scsi3addr);
3985 3986 3987 3988 3989 3990 3991 3992 3993 3994
		if (volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED &&
		    h->legacy_board) {
			/*
			 * Legacy boards might not support volume status
			 */
			dev_info(&h->pdev->dev,
				 "C0:T%d:L%d Volume status not available, assuming online.\n",
				 this_device->target, this_device->lun);
			volume_offline = 0;
		}
3995
		this_device->volume_offline = volume_offline;
3996 3997 3998 3999 4000 4001 4002
		if (volume_offline == HPSA_LV_FAILED) {
			rc = HPSA_LV_FAILED;
			dev_err(&h->pdev->dev,
				"%s: LV failed, device will be skipped.\n",
				__func__);
			goto bail_out;
		}
4003
	} else {
4004
		this_device->raid_level = RAID_UNKNOWN;
4005 4006
		this_device->offload_config = 0;
		this_device->offload_enabled = 0;
4007
		this_device->offload_to_be_enabled = 0;
4008
		this_device->hba_ioaccel_enabled = 0;
4009
		this_device->volume_offline = 0;
4010
		this_device->queue_depth = h->nr_cmds;
4011
	}
4012

4013 4014 4015
	if (this_device->external)
		this_device->queue_depth = EXTERNAL_QD;

4016 4017 4018 4019 4020 4021 4022 4023 4024
	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);
	}
4025 4026 4027 4028 4029
	kfree(inq_buff);
	return 0;

bail_out:
	kfree(inq_buff);
4030
	return rc;
4031 4032
}

4033 4034
/*
 * Helper function to assign bus, target, lun mapping of devices.
4035 4036 4037
 * 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.)
4038
*/
4039
static void figure_bus_target_lun(struct ctlr_info *h,
4040
	u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
4041
{
4042
	u32 lunid = get_unaligned_le32(lunaddrbytes);
4043 4044 4045

	if (!is_logical_dev_addr_mode(lunaddrbytes)) {
		/* physical device, target and lun filled in later */
4046 4047 4048 4049 4050
		if (is_hba_lunid(lunaddrbytes)) {
			int bus = HPSA_HBA_BUS;

			if (!device->rev)
				bus = HPSA_LEGACY_HBA_BUS;
4051
			hpsa_set_bus_target_lun(device,
4052 4053
					bus, 0, lunid & 0x3fff);
		} else
4054
			/* defer target, lun assignment for physical devices */
4055 4056
			hpsa_set_bus_target_lun(device,
					HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
4057 4058 4059
		return;
	}
	/* It's a logical device */
S
Scott Teel 已提交
4060
	if (device->external) {
4061
		hpsa_set_bus_target_lun(device,
4062 4063
			HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
			lunid & 0x00ff);
4064
		return;
4065
	}
4066 4067
	hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
				0, lunid & 0x3fff);
4068 4069
}

S
Scott Teel 已提交
4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090
static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlocal_logicals)
{
	/* In report logicals, local logicals are listed first,
	* then any externals.
	*/
	int logicals_start = nphysicals + (raid_ctlr_position == 0);

	if (i == raid_ctlr_position)
		return 0;

	if (i < logicals_start)
		return 0;

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

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

4091 4092 4093 4094 4095 4096 4097
/*
 * 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,
4098
	struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4099
	struct ReportLUNdata *logdev, u32 *nlogicals)
4100
{
4101
	if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4102 4103 4104
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		return -1;
	}
4105
	*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4106
	if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4107 4108
		dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
			HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4109 4110
		*nphysicals = HPSA_MAX_PHYS_LUN;
	}
4111
	if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4112 4113 4114
		dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
		return -1;
	}
4115
	*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133
	/* 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
4134 4135
static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlogicals,
4136
	struct ReportExtendedLUNdata *physdev_list,
4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150
	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)
4151 4152
		return &physdev_list->LUN[i -
				(raid_ctlr_position == 0)].lunid[0];
4153 4154 4155 4156 4157 4158 4159 4160

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

4161 4162 4163
/* 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,
4164
		struct ReportExtendedLUNdata *rlep, int rle_index,
4165 4166 4167
		struct bmic_identify_physical_device *id_phys)
{
	int rc;
4168 4169 4170
	struct ext_report_lun_entry *rle;

	rle = &rlep->LUN[rle_index];
4171 4172

	dev->ioaccel_handle = rle->ioaccel_handle;
4173
	if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4174
		dev->hba_ioaccel_enabled = 1;
4175
	memset(id_phys, 0, sizeof(*id_phys));
4176 4177
	rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
			GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189
			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 */
}

4190
static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4191
	struct ReportExtendedLUNdata *rlep, int rle_index,
4192 4193
	struct bmic_identify_physical_device *id_phys)
{
4194 4195 4196
	struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];

	if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215
		this_device->hba_ioaccel_enabled = 1;

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

S
Scott Teel 已提交
4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240
/* get number of local logical disks. */
static int hpsa_set_local_logical_count(struct ctlr_info *h,
	struct bmic_identify_controller *id_ctlr,
	u32 *nlocals)
{
	int rc;

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

4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304
static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
{
	struct bmic_identify_physical_device *id_phys;
	bool is_spare = false;
	int rc;

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

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

	kfree(id_phys);
	return is_spare;
}

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

#define BMIC_DEVICE_TYPE_ENCLOSURE  6

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

	if (!MASKED_DEVICE(lunaddrbytes))
		return false;

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

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

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

	if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
		return false;

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

	return false;
}
S
Scott Teel 已提交
4305

D
Don Brace 已提交
4306
static void hpsa_update_scsi_devices(struct ctlr_info *h)
4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317
{
	/* 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.
	 */
4318
	struct ReportExtendedLUNdata *physdev_list = NULL;
4319
	struct ReportLUNdata *logdev_list = NULL;
4320
	struct bmic_identify_physical_device *id_phys = NULL;
S
Scott Teel 已提交
4321
	struct bmic_identify_controller *id_ctlr = NULL;
4322 4323
	u32 nphysicals = 0;
	u32 nlogicals = 0;
S
Scott Teel 已提交
4324
	u32 nlocal_logicals = 0;
4325
	u32 ndev_allocated = 0;
4326 4327
	struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
	int ncurrent = 0;
4328
	int i, n_ext_target_devs, ndevs_to_allocate;
4329
	int raid_ctlr_position;
K
Kevin Barnett 已提交
4330
	bool physical_device;
4331
	DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4332

4333
	currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
4334 4335
	physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
	logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4336
	tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4337
	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
S
Scott Teel 已提交
4338
	id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4339

4340
	if (!currentsd || !physdev_list || !logdev_list ||
S
Scott Teel 已提交
4341
		!tmpdevice || !id_phys || !id_ctlr) {
4342 4343 4344 4345 4346
		dev_err(&h->pdev->dev, "out of memory\n");
		goto out;
	}
	memset(lunzerobits, 0, sizeof(lunzerobits));

D
Don Brace 已提交
4347 4348
	h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */

4349
	if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
D
Don Brace 已提交
4350 4351
			logdev_list, &nlogicals)) {
		h->drv_req_rescan = 1;
4352
		goto out;
D
Don Brace 已提交
4353
	}
4354

S
Scott Teel 已提交
4355 4356 4357 4358 4359 4360
	/* Set number of local logicals (non PTRAID) */
	if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
		dev_warn(&h->pdev->dev,
			"%s: Can't determine number of local logical devices.\n",
			__func__);
	}
4361

4362 4363 4364
	/* 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.
4365
	 */
4366
	ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4367

4368 4369
	hpsa_ext_ctrl_present(h, physdev_list);

4370 4371
	/* Allocate the per device structures */
	for (i = 0; i < ndevs_to_allocate; i++) {
4372 4373 4374 4375 4376 4377 4378
		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;
		}

4379 4380
		currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
		if (!currentsd[i]) {
D
Don Brace 已提交
4381
			h->drv_req_rescan = 1;
4382 4383 4384 4385 4386
			goto out;
		}
		ndev_allocated++;
	}

4387
	if (is_scsi_rev_5(h))
4388 4389 4390 4391
		raid_ctlr_position = 0;
	else
		raid_ctlr_position = nphysicals + nlogicals;

4392
	/* adjust our table of devices */
4393
	n_ext_target_devs = 0;
4394
	for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4395
		u8 *lunaddrbytes, is_OBDR = 0;
4396
		int rc = 0;
4397
		int phys_dev_index = i - (raid_ctlr_position == 0);
4398
		bool skip_device = false;
4399

4400 4401
		memset(tmpdevice, 0, sizeof(*tmpdevice));

K
Kevin Barnett 已提交
4402
		physical_device = i < nphysicals + (raid_ctlr_position == 0);
4403 4404

		/* Figure out where the LUN ID info is coming from */
4405 4406
		lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
			i, nphysicals, nlogicals, physdev_list, logdev_list);
4407

4408 4409 4410 4411 4412
		/* Determine if this is a lun from an external target array */
		tmpdevice->external =
			figure_external_status(h, raid_ctlr_position, i,
						nphysicals, nlocal_logicals);

4413 4414 4415 4416 4417 4418 4419 4420 4421
		/*
		 * Skip over some devices such as a spare.
		 */
		if (!tmpdevice->external && physical_device) {
			skip_device = hpsa_skip_device(h, lunaddrbytes,
					&physdev_list->LUN[phys_dev_index]);
			if (skip_device)
				continue;
		}
4422

D
Don Brace 已提交
4423
		/* Get device type, vendor, model, device id, raid_map */
4424 4425 4426 4427 4428
		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
4429
			h->drv_req_rescan = 1;
4430
			goto out;
D
Don Brace 已提交
4431
		}
4432
		if (rc) {
4433
			h->drv_req_rescan = 1;
4434 4435 4436
			continue;
		}

4437
		figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
4438 4439 4440
		this_device = currentsd[ncurrent];

		*this_device = *tmpdevice;
K
Kevin Barnett 已提交
4441
		this_device->physical_device = physical_device;
4442

K
Kevin Barnett 已提交
4443 4444 4445 4446 4447
		/*
		 * Expose all devices except for physical devices that
		 * are masked.
		 */
		if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4448 4449 4450
			this_device->expose_device = 0;
		else
			this_device->expose_device = 1;
4451

K
Kevin Barnett 已提交
4452 4453 4454 4455 4456 4457

		/*
		 * Get the SAS address for physical devices that are exposed.
		 */
		if (this_device->physical_device && this_device->expose_device)
			hpsa_get_sas_address(h, lunaddrbytes, this_device);
4458

4459
		switch (this_device->devtype) {
4460
		case TYPE_ROM:
4461 4462 4463 4464 4465 4466 4467
			/* 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.
			 */
4468 4469
			if (is_OBDR)
				ncurrent++;
4470 4471
			break;
		case TYPE_DISK:
D
Don Brace 已提交
4472
		case TYPE_ZBC:
K
Kevin Barnett 已提交
4473
			if (this_device->physical_device) {
4474 4475
				/* The disk is in HBA mode. */
				/* Never use RAID mapper in HBA mode. */
4476
				this_device->offload_enabled = 0;
4477
				hpsa_get_ioaccel_drive_info(h, this_device,
4478 4479 4480
					physdev_list, phys_dev_index, id_phys);
				hpsa_get_path_info(this_device,
					physdev_list, phys_dev_index, id_phys);
4481
			}
4482
			ncurrent++;
4483 4484 4485
			break;
		case TYPE_TAPE:
		case TYPE_MEDIUM_CHANGER:
4486 4487
			ncurrent++;
			break;
4488
		case TYPE_ENCLOSURE:
4489 4490
			if (!this_device->external)
				hpsa_get_enclosure_info(h, lunaddrbytes,
4491 4492
						physdev_list, phys_dev_index,
						this_device);
4493
			ncurrent++;
4494
			break;
4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507
		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;
		}
4508
		if (ncurrent >= HPSA_MAX_DEVICES)
4509 4510
			break;
	}
K
Kevin Barnett 已提交
4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522

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

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

D
Don Brace 已提交
4523
	adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4524 4525 4526 4527 4528 4529 4530
out:
	kfree(tmpdevice);
	for (i = 0; i < ndev_allocated; i++)
		kfree(currentsd[i]);
	kfree(currentsd);
	kfree(physdev_list);
	kfree(logdev_list);
S
Scott Teel 已提交
4531
	kfree(id_ctlr);
4532
	kfree(id_phys);
4533 4534
}

4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545
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;
}

4546 4547
/*
 * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4548 4549 4550
 * dma mapping  and fills in the scatter gather entries of the
 * hpsa command, cp.
 */
4551
static int hpsa_scatter_gather(struct ctlr_info *h,
4552 4553 4554 4555
		struct CommandList *cp,
		struct scsi_cmnd *cmd)
{
	struct scatterlist *sg;
4556
	int use_sg, i, sg_limit, chained, last_sg;
4557
	struct SGDescriptor *curr_sg;
4558

4559
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4560 4561 4562 4563 4564 4565 4566 4567

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

	if (!use_sg)
		goto sglist_finished;

4568 4569 4570 4571 4572 4573 4574
	/*
	 * 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.
	 */
4575
	curr_sg = cp->SG;
4576 4577 4578 4579
	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) {
4580
		hpsa_set_sg_descriptor(curr_sg, sg);
4581 4582
		curr_sg++;
	}
4583

4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598
	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++;
		}
	}

4599
	/* Back the pointer up to the last entry and mark it as "last". */
4600
	(curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4601 4602 4603 4604 4605 4606

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

	if (chained) {
		cp->Header.SGList = h->max_cmd_sg_entries;
4607
		cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4608 4609 4610 4611
		if (hpsa_map_sg_chain_block(h, cp)) {
			scsi_dma_unmap(cmd);
			return -1;
		}
4612
		return 0;
4613 4614 4615 4616
	}

sglist_finished:

4617
	cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4618
	cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4619 4620 4621
	return 0;
}

4622 4623 4624 4625 4626 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
#define BUFLEN 128
static inline void warn_zero_length_transfer(struct ctlr_info *h,
						u8 *cdb, int cdb_len,
						const char *func)
{
	char buf[BUFLEN];
	int outlen;
	int i;

	outlen = scnprintf(buf, BUFLEN,
				"%s: Blocking zero-length request: CDB:", func);
	for (i = 0; i < cdb_len; i++)
		outlen += scnprintf(buf+outlen, BUFLEN - outlen,
					"%02hhx", cdb[i]);
	dev_warn(&h->pdev->dev, "%s\n", buf);
}

#define IO_ACCEL_INELIGIBLE 1
/* zero-length transfers trigger hardware errors. */
static bool is_zero_length_transfer(u8 *cdb)
{
	u32 block_cnt;

	/* Block zero-length transfer sizes on certain commands. */
	switch (cdb[0]) {
	case READ_10:
	case WRITE_10:
	case VERIFY:		/* 0x2F */
	case WRITE_VERIFY:	/* 0x2E */
		block_cnt = get_unaligned_be16(&cdb[7]);
		break;
	case READ_12:
	case WRITE_12:
	case VERIFY_12: /* 0xAF */
	case WRITE_VERIFY_12:	/* 0xAE */
		block_cnt = get_unaligned_be32(&cdb[6]);
		break;
	case READ_16:
	case WRITE_16:
	case VERIFY_16:		/* 0x8F */
		block_cnt = get_unaligned_be32(&cdb[10]);
		break;
	default:
		return false;
	}

	return block_cnt == 0;
}

4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684
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) {
4685 4686 4687
			block = (((cdb[1] & 0x1F) << 16) |
				(cdb[2] << 8) |
				cdb[3]);
4688
			block_cnt = cdb[4];
4689 4690
			if (block_cnt == 0)
				block_cnt = 256;
4691 4692
		} else {
			BUG_ON(*cdb_len != 12);
4693 4694
			block = get_unaligned_be32(&cdb[2]);
			block_cnt = get_unaligned_be32(&cdb[6]);
4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714
		}
		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;
}

4715
static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4716
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4717
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728
{
	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;

4729
	/* TODO: implement chaining support */
4730 4731
	if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4732
		return IO_ACCEL_INELIGIBLE;
4733
	}
4734

4735 4736
	BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);

4737 4738 4739 4740 4741 4742
	if (is_zero_length_transfer(cdb)) {
		warn_zero_length_transfer(h, cdb, cdb_len, __func__);
		atomic_dec(&phys_disk->ioaccel_cmds_out);
		return IO_ACCEL_INELIGIBLE;
	}

4743 4744
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4745
		return IO_ACCEL_INELIGIBLE;
4746
	}
4747

4748 4749 4750 4751 4752 4753 4754 4755
	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);
4756 4757
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4758
		return use_sg;
4759
	}
4760 4761 4762 4763 4764 4765 4766

	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;
4767 4768 4769
			curr_sg->Addr = cpu_to_le64(addr64);
			curr_sg->Len = cpu_to_le32(len);
			curr_sg->Ext = cpu_to_le32(0);
4770 4771
			curr_sg++;
		}
4772
		(--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793

		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;
	}

4794
	c->Header.SGList = use_sg;
4795
	/* Fill out the command structure to submit */
D
Don Brace 已提交
4796 4797 4798 4799 4800
	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);
4801 4802
	memcpy(cp->CDB, cdb, cdb_len);
	memcpy(cp->CISS_LUN, scsi3addr, 8);
4803
	/* Tag was already set at init time. */
4804
	enqueue_cmd_and_start_io(h, c);
4805 4806
	return 0;
}
4807

4808 4809 4810 4811 4812 4813 4814 4815 4816 4817
/*
 * 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;

4818 4819 4820
	if (!dev)
		return -1;

4821 4822
	c->phys_disk = dev;

4823
	return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4824
		cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4825 4826
}

4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838
/*
 * 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
4839
	if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853
		return;
	/* Set the data encryption key index. */
	cp->dekindex = map->dekindex;

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

	/* Set encryption tweak values based on logical block address
	 * If block size is 512, tweak value is LBA.
	 * For other block sizes, tweak is (LBA * block size)/ 512)
	 */
	switch (cmd->cmnd[0]) {
	/* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
	case READ_6:
4854 4855 4856 4857
	case WRITE_6:
		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
				(cmd->cmnd[2] << 8) |
				cmd->cmnd[3]);
4858 4859 4860 4861 4862 4863
		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
4864
		first_block = get_unaligned_be32(&cmd->cmnd[2]);
4865 4866 4867
		break;
	case WRITE_16:
	case READ_16:
D
Don Brace 已提交
4868
		first_block = get_unaligned_be64(&cmd->cmnd[2]);
4869 4870 4871
		break;
	default:
		dev_err(&h->pdev->dev,
D
Don Brace 已提交
4872 4873
			"ERROR: %s: size (0x%x) not supported for encryption\n",
			__func__, cmd->cmnd[0]);
4874 4875 4876
		BUG();
		break;
	}
D
Don Brace 已提交
4877 4878 4879 4880 4881 4882 4883

	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);
4884 4885
}

4886 4887
static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4888
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4889 4890 4891 4892 4893 4894 4895 4896 4897 4898
{
	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;

4899 4900 4901 4902 4903 4904
	if (!cmd->device)
		return -1;

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

4905
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4906

4907 4908 4909 4910 4911 4912
	if (is_zero_length_transfer(cdb)) {
		warn_zero_length_transfer(h, cdb, cdb_len, __func__);
		atomic_dec(&phys_disk->ioaccel_cmds_out);
		return IO_ACCEL_INELIGIBLE;
	}

4913 4914
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4915
		return IO_ACCEL_INELIGIBLE;
4916 4917
	}

4918 4919 4920 4921 4922 4923 4924 4925 4926 4927
	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);
4928 4929
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
4930
		return use_sg;
4931
	}
4932 4933 4934

	if (use_sg) {
		curr_sg = cp->sg;
4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946
		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];
		}
4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961
		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:
4962 4963
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_OUT;
4964 4965
			break;
		case DMA_FROM_DEVICE:
4966 4967
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_IN;
4968 4969
			break;
		case DMA_NONE:
4970 4971
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_NO_DATA;
4972 4973 4974 4975 4976 4977 4978 4979
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
				cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
4980 4981
		cp->direction &= ~IOACCEL2_DIRECTION_MASK;
		cp->direction |= IOACCEL2_DIR_NO_DATA;
4982
	}
4983 4984 4985 4986

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

D
Don Brace 已提交
4987
	cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4988
	cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4989 4990 4991 4992 4993
	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));
4994
	cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4995

4996 4997 4998
	/* fill in sg elements */
	if (use_sg > h->ioaccel_maxsg) {
		cp->sg_count = 1;
D
Don Brace 已提交
4999
		cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
5000 5001 5002 5003 5004 5005 5006 5007
		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;

5008 5009 5010 5011 5012 5013 5014 5015 5016
	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,
5017
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
5018
{
5019 5020 5021 5022 5023 5024
	if (!c->scsi_cmd->device)
		return -1;

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

5025 5026 5027 5028 5029 5030
	/* 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;
	}
5031 5032
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
5033 5034
						cdb, cdb_len, scsi3addr,
						phys_disk);
5035 5036
	else
		return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
5037 5038
						cdb, cdb_len, scsi3addr,
						phys_disk);
5039 5040
}

5041 5042 5043 5044 5045
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
5046
		*map_index %= le16_to_cpu(map->data_disks_per_row);
5047 5048 5049 5050
		return;
	}
	do {
		/* determine mirror group that *map_index indicates */
D
Don Brace 已提交
5051 5052
		*current_group = *map_index /
			le16_to_cpu(map->data_disks_per_row);
5053 5054
		if (offload_to_mirror == *current_group)
			continue;
D
Don Brace 已提交
5055
		if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
5056
			/* select map index from next group */
D
Don Brace 已提交
5057
			*map_index += le16_to_cpu(map->data_disks_per_row);
5058 5059 5060
			(*current_group)++;
		} else {
			/* select map index from first group */
D
Don Brace 已提交
5061
			*map_index %= le16_to_cpu(map->data_disks_per_row);
5062 5063 5064 5065 5066
			*current_group = 0;
		}
	} while (offload_to_mirror != *current_group);
}

5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084
/*
 * 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;
5085 5086 5087 5088 5089 5090 5091 5092
	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;
5093 5094 5095 5096 5097 5098
	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
5099
	u16 strip_size;
5100 5101 5102
#if BITS_PER_LONG == 32
	u64 tmpdiv;
#endif
5103
	int offload_to_mirror;
5104

5105 5106 5107
	if (!dev)
		return -1;

5108 5109 5110 5111 5112
	/* check for valid opcode, get LBA and block count */
	switch (cmd->cmnd[0]) {
	case WRITE_6:
		is_write = 1;
	case READ_6:
5113 5114 5115
		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
				(cmd->cmnd[2] << 8) |
				cmd->cmnd[3]);
5116
		block_cnt = cmd->cmnd[4];
5117 5118
		if (block_cnt == 0)
			block_cnt = 256;
5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 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
		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
5174 5175
	if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
		last_block < first_block)
5176 5177 5178
		return IO_ACCEL_INELIGIBLE;

	/* calculate stripe information for the request */
D
Don Brace 已提交
5179 5180 5181
	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);
5182 5183 5184 5185 5186 5187 5188 5189 5190 5191
#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
5192
	(void) do_div(tmpdiv, strip_size);
5193 5194
	first_column = tmpdiv;
	tmpdiv = last_row_offset;
D
Don Brace 已提交
5195
	(void) do_div(tmpdiv, strip_size);
5196 5197 5198 5199 5200 5201
	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
5202 5203
	first_column = first_row_offset / strip_size;
	last_column = last_row_offset / strip_size;
5204 5205 5206 5207 5208 5209 5210
#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
5211 5212
	total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
5213
	map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
Don Brace 已提交
5214
				le16_to_cpu(map->row_cnt);
5215 5216 5217 5218 5219 5220 5221 5222 5223
	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
5224
		 */
D
Don Brace 已提交
5225
		BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
5226
		if (dev->offload_to_mirror)
D
Don Brace 已提交
5227
			map_index += le16_to_cpu(map->data_disks_per_row);
5228
		dev->offload_to_mirror = !dev->offload_to_mirror;
5229 5230 5231 5232 5233
		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
5234
		BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
5235 5236 5237 5238 5239 5240

		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
5241 5242
			(offload_to_mirror >=
			le16_to_cpu(map->layout_map_count) - 1)
5243 5244 5245 5246 5247 5248 5249 5250 5251
			? 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
5252
		if (le16_to_cpu(map->layout_map_count) <= 1)
5253 5254 5255 5256
			break;

		/* Verify first and last block are in same RAID group */
		r5or6_blocks_per_row =
D
Don Brace 已提交
5257 5258
			le16_to_cpu(map->strip_size) *
			le16_to_cpu(map->data_disks_per_row);
5259
		BUG_ON(r5or6_blocks_per_row == 0);
D
Don Brace 已提交
5260 5261
		stripesize = r5or6_blocks_per_row *
			le16_to_cpu(map->layout_map_count);
5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276
#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
5277
		if (first_group != last_group)
5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323
			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
5324
			r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5325
		r5or6_last_column =
D
Don Brace 已提交
5326
			r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5327 5328 5329 5330 5331 5332
#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
5333
			le16_to_cpu(map->row_cnt);
5334 5335

		map_index = (first_group *
D
Don Brace 已提交
5336
			(le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5337 5338 5339 5340
			(map_row * total_disks_per_row) + first_column;
		break;
	default:
		return IO_ACCEL_INELIGIBLE;
5341
	}
5342

5343 5344 5345
	if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
		return IO_ACCEL_INELIGIBLE;

5346
	c->phys_disk = dev->phys_disk[map_index];
5347 5348
	if (!c->phys_disk)
		return IO_ACCEL_INELIGIBLE;
5349

5350
	disk_handle = dd[map_index].ioaccel_handle;
D
Don Brace 已提交
5351 5352 5353 5354
	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));
5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396
	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,
5397 5398
						dev->scsi3addr,
						dev->phys_disk[map_index]);
5399 5400
}

5401 5402 5403 5404 5405
/*
 * 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
 */
5406 5407 5408
static int hpsa_ciss_submit(struct ctlr_info *h,
	struct CommandList *c, struct scsi_cmnd *cmd,
	unsigned char scsi3addr[])
5409 5410 5411 5412 5413 5414
{
	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);
5415
	c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5416 5417 5418 5419 5420 5421 5422 5423 5424

	/* 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:
5425 5426
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5427 5428
		break;
	case DMA_FROM_DEVICE:
5429 5430
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5431 5432
		break;
	case DMA_NONE:
5433 5434
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5435 5436 5437 5438 5439 5440 5441
		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() )
		 */

5442 5443
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460
		/* 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;
	}

5461
	if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5462
		hpsa_cmd_resolve_and_free(h, c);
5463 5464 5465 5466 5467 5468 5469
		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;
}

5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487
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;
5488
	c->scsi_cmd = SCSI_CMD_IDLE;
5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507
}

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);

5508 5509
	BUG_ON(c->cmdindex != index);

5510 5511 5512 5513 5514
	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
	memset(c->err_info, 0, sizeof(*c->err_info));
	c->busaddr = (u32) cmd_dma_handle;
}

5515 5516 5517 5518 5519 5520 5521
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;

5522 5523 5524
	if (!dev)
		return SCSI_MLQUEUE_HOST_BUSY;

5525 5526 5527 5528 5529 5530 5531 5532 5533
	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;
5534
	} else if (dev->hba_ioaccel_enabled) {
5535 5536 5537 5538 5539 5540 5541 5542 5543 5544
		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;
}

5545 5546 5547 5548
static void hpsa_command_resubmit_worker(struct work_struct *work)
{
	struct scsi_cmnd *cmd;
	struct hpsa_scsi_dev_t *dev;
5549
	struct CommandList *c = container_of(work, struct CommandList, work);
5550 5551 5552 5553 5554

	cmd = c->scsi_cmd;
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
5555
		return hpsa_cmd_free_and_done(c->h, c, cmd);
5556
	}
W
Webb Scales 已提交
5557
	if (c->reset_pending)
5558
		return hpsa_cmd_free_and_done(c->h, c, cmd);
5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575
	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;
5576
				return hpsa_cmd_free_and_done(h, c, cmd);
5577 5578 5579 5580
			}
			/* else, fall thru and resubmit down CISS path */
		}
	}
5581
	hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5582 5583 5584 5585 5586
	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.
5587 5588 5589
		 *
		 * hpsa_ciss_submit will have already freed c
		 * if it encountered a dma mapping failure.
5590 5591 5592 5593 5594 5595
		 */
		cmd->result = DID_IMM_RETRY << 16;
		cmd->scsi_done(cmd);
	}
}

5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606
/* 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);
5607 5608 5609

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

5610 5611
	dev = cmd->device->hostdata;
	if (!dev) {
5612
		cmd->result = DID_NO_CONNECT << 16;
5613 5614 5615 5616 5617
		cmd->scsi_done(cmd);
		return 0;
	}

	if (dev->removed) {
5618 5619 5620 5621 5622
		cmd->result = DID_NO_CONNECT << 16;
		cmd->scsi_done(cmd);
		return 0;
	}

5623
	memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
5624

5625
	if (unlikely(lockup_detected(h))) {
5626
		cmd->result = DID_NO_CONNECT << 16;
5627 5628 5629
		cmd->scsi_done(cmd);
		return 0;
	}
5630
	c = cmd_tagged_alloc(h, cmd);
5631

5632 5633
	/*
	 * Call alternate submit routine for I/O accelerated commands.
5634 5635 5636
	 * Retries always go down the normal I/O path.
	 */
	if (likely(cmd->retries == 0 &&
5637 5638
			!blk_rq_is_passthrough(cmd->request) &&
			h->acciopath_status)) {
5639 5640 5641 5642
		rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
		if (rc == 0)
			return 0;
		if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5643
			hpsa_cmd_resolve_and_free(h, c);
5644
			return SCSI_MLQUEUE_HOST_BUSY;
5645 5646 5647 5648 5649
		}
	}
	return hpsa_ciss_submit(h, c, cmd, scsi3addr);
}

5650
static void hpsa_scan_complete(struct ctlr_info *h)
5651 5652 5653
{
	unsigned long flags;

5654 5655
	spin_lock_irqsave(&h->scan_lock, flags);
	h->scan_finished = 1;
5656
	wake_up(&h->scan_wait_queue);
5657
	spin_unlock_irqrestore(&h->scan_lock, flags);
5658 5659
}

5660 5661 5662 5663 5664
static void hpsa_scan_start(struct Scsi_Host *sh)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;

5665 5666 5667 5668 5669 5670 5671 5672
	/*
	 * 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);
5673

5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684
	/*
	 * If a scan is already waiting to run, no need to add another
	 */
	spin_lock_irqsave(&h->scan_lock, flags);
	if (h->scan_waiting) {
		spin_unlock_irqrestore(&h->scan_lock, flags);
		return;
	}

	spin_unlock_irqrestore(&h->scan_lock, flags);

5685 5686 5687 5688 5689
	/* wait until any scan already in progress is finished. */
	while (1) {
		spin_lock_irqsave(&h->scan_lock, flags);
		if (h->scan_finished)
			break;
5690
		h->scan_waiting = 1;
5691 5692 5693 5694 5695 5696 5697 5698 5699
		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 */
5700
	h->scan_waiting = 0;
5701 5702
	spin_unlock_irqrestore(&h->scan_lock, flags);

5703 5704
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
5705

D
Don Brace 已提交
5706 5707 5708
	/*
	 * Do the scan after a reset completion
	 */
D
Don Brace 已提交
5709
	spin_lock_irqsave(&h->reset_lock, flags);
D
Don Brace 已提交
5710 5711
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
D
Don Brace 已提交
5712
		spin_unlock_irqrestore(&h->reset_lock, flags);
5713
		hpsa_scan_complete(h);
D
Don Brace 已提交
5714 5715
		return;
	}
D
Don Brace 已提交
5716
	spin_unlock_irqrestore(&h->reset_lock, flags);
D
Don Brace 已提交
5717

D
Don Brace 已提交
5718
	hpsa_update_scsi_devices(h);
5719

5720
	hpsa_scan_complete(h);
5721 5722
}

D
Don Brace 已提交
5723 5724
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
5725 5726 5727 5728
	struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;

	if (!logical_drive)
		return -ENODEV;
D
Don Brace 已提交
5729 5730 5731

	if (qdepth < 1)
		qdepth = 1;
5732 5733 5734 5735
	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
5736 5737
}

5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750
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;
}

5751
static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5752
{
5753
	struct Scsi_Host *sh;
5754

5755
	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5756 5757 5758 5759
	if (sh == NULL) {
		dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
		return -ENOMEM;
	}
5760 5761 5762 5763 5764 5765 5766 5767

	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;
5768
	sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5769
	sh->cmd_per_lun = sh->can_queue;
5770
	sh->sg_tablesize = h->maxsgentries;
K
Kevin Barnett 已提交
5771
	sh->transportt = hpsa_sas_transport_template;
5772
	sh->hostdata[0] = (unsigned long) h;
5773
	sh->irq = pci_irq_vector(h->pdev, 0);
5774
	sh->unique_id = sh->irq;
5775

5776
	h->scsi_host = sh;
5777
	return 0;
5778
}
5779

5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790
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;
5791 5792
}

5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809
/*
 * 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;
}

5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822
/*
 * 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);
5823
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852
	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)
5853
{
5854
	int rc;
5855 5856 5857 5858
	int count = 0;
	int waittime = 1; /* seconds */

	/* Send test unit ready until device ready, or give up. */
5859
	for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5860

5861 5862
		/*
		 * Wait for a bit.  do this first, because if we send
5863 5864 5865
		 * the TUR right away, the reset will just abort it.
		 */
		msleep(1000 * waittime);
5866 5867 5868 5869

		rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
		if (!rc)
			break;
5870 5871 5872

		/* Increase wait time with each try, up to a point. */
		if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5873
			waittime *= 2;
5874

5875 5876 5877 5878
		dev_warn(&h->pdev->dev,
			 "waiting %d secs for device to become ready.\n",
			 waittime);
	}
5879

5880 5881
	return rc;
}
5882

5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910
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)
5911 5912 5913 5914 5915 5916 5917 5918
			break;
	}

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

5919
	cmd_free(h, c);
5920 5921 5922 5923 5924 5925 5926 5927
	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)
{
D
Don Brace 已提交
5928
	int rc = SUCCESS;
5929 5930
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
S
Scott Teel 已提交
5931
	u8 reset_type;
5932
	char msg[48];
D
Don Brace 已提交
5933
	unsigned long flags;
5934 5935 5936 5937 5938

	/* find the controller to which the command to be aborted was sent */
	h = sdev_to_hba(scsicmd->device);
	if (h == NULL) /* paranoia */
		return FAILED;
5939

D
Don Brace 已提交
5940 5941 5942 5943 5944 5945 5946 5947
	spin_lock_irqsave(&h->reset_lock, flags);
	h->reset_in_progress = 1;
	spin_unlock_irqrestore(&h->reset_lock, flags);

	if (lockup_detected(h)) {
		rc = FAILED;
		goto return_reset_status;
	}
5948

5949 5950
	dev = scsicmd->device->hostdata;
	if (!dev) {
W
Webb Scales 已提交
5951
		dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
D
Don Brace 已提交
5952 5953
		rc = FAILED;
		goto return_reset_status;
5954
	}
5955

D
Don Brace 已提交
5956 5957 5958 5959
	if (dev->devtype == TYPE_ENCLOSURE) {
		rc = SUCCESS;
		goto return_reset_status;
	}
D
Don Brace 已提交
5960

5961 5962
	/* if controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
5963 5964 5965
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5966
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
D
Don Brace 已提交
5967 5968
		rc = FAILED;
		goto return_reset_status;
5969 5970 5971 5972
	}

	/* this reset request might be the result of a lockup; check */
	if (detect_controller_lockup(h)) {
5973 5974 5975
		snprintf(msg, sizeof(msg),
			 "cmd %d RESET FAILED, new lockup detected",
			 hpsa_get_cmd_index(scsicmd));
5976
		hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
D
Don Brace 已提交
5977 5978
		rc = FAILED;
		goto return_reset_status;
5979 5980
	}

W
Webb Scales 已提交
5981
	/* Do not attempt on controller */
D
Don Brace 已提交
5982 5983 5984 5985
	if (is_hba_lunid(dev->scsi3addr)) {
		rc = SUCCESS;
		goto return_reset_status;
	}
W
Webb Scales 已提交
5986

S
Scott Teel 已提交
5987 5988 5989 5990 5991 5992 5993 5994
	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);
5995

5996
	/* send a reset to the SCSI LUN which the command was sent to */
S
Scott Teel 已提交
5997
	rc = hpsa_do_reset(h, dev, dev->scsi3addr, reset_type,
W
Webb Scales 已提交
5998
			   DEFAULT_REPLY_QUEUE);
D
Don Brace 已提交
5999 6000 6001 6002 6003
	if (rc == 0)
		rc = SUCCESS;
	else
		rc = FAILED;

S
Scott Teel 已提交
6004 6005
	sprintf(msg, "reset %s %s",
		reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
D
Don Brace 已提交
6006
		rc == SUCCESS ? "completed successfully" : "failed");
W
Webb Scales 已提交
6007
	hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
D
Don Brace 已提交
6008 6009 6010

return_reset_status:
	spin_lock_irqsave(&h->reset_lock, flags);
D
Don Brace 已提交
6011
	h->reset_in_progress = 0;
D
Don Brace 已提交
6012 6013
	spin_unlock_irqrestore(&h->reset_lock, flags);
	return rc;
6014 6015
}

6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060
/*
 * 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
D
Don Brace 已提交
6061
	 * else to free it, because it is accessed by index.
6062 6063 6064 6065
	 */
	(void)atomic_dec(&c->refcount);
}

6066 6067 6068 6069 6070
/*
 * 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.
6071 6072
 * This function never gives up and returns NULL.  If it hangs,
 * another thread must call cmd_free() to free some tags.
6073
 */
6074

6075 6076 6077
static struct CommandList *cmd_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
6078
	int refcount, i;
6079
	int offset = 0;
6080

6081 6082
	/*
	 * There is some *extremely* small but non-zero chance that that
6083 6084 6085 6086 6087 6088 6089 6090
	 * 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.
6091 6092 6093 6094 6095 6096 6097
	 *
	 * 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.
6098
	 */
6099

6100
	for (;;) {
6101 6102 6103 6104
		i = find_next_zero_bit(h->cmd_pool_bits,
					HPSA_NRESERVED_CMDS,
					offset);
		if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6105 6106 6107 6108 6109 6110 6111
			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 */
6112
			offset = (i + 1) % HPSA_NRESERVED_CMDS;
6113 6114 6115 6116 6117 6118
			continue;
		}
		set_bit(i & (BITS_PER_LONG - 1),
			h->cmd_pool_bits + (i / BITS_PER_LONG));
		break; /* it's ours now. */
	}
6119
	hpsa_cmd_partial_init(h, i, c);
6120 6121 6122
	return c;
}

6123 6124 6125 6126 6127 6128
/*
 * 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.
 */
6129 6130
static void cmd_free(struct ctlr_info *h, struct CommandList *c)
{
6131 6132
	if (atomic_dec_and_test(&c->refcount)) {
		int i;
6133

6134 6135 6136 6137
		i = c - h->cmd_pool;
		clear_bit(i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG));
	}
6138 6139 6140 6141
}

#ifdef CONFIG_COMPAT

D
Don Brace 已提交
6142 6143
static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
	void __user *arg)
6144 6145 6146 6147 6148 6149 6150 6151
{
	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;

6152
	memset(&arg64, 0, sizeof(arg64));
6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167
	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
6168
	err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
6169 6170 6171 6172 6173 6174 6175 6176 6177 6178
	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
6179
	int cmd, void __user *arg)
6180 6181 6182 6183 6184 6185 6186 6187 6188
{
	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;

6189
	memset(&arg64, 0, sizeof(arg64));
6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205
	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
6206
	err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
6207 6208 6209 6210 6211 6212 6213 6214
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
6215

D
Don Brace 已提交
6216
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244
{
	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;
	}
}
6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289
#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;
6290
	u64 temp64;
6291
	int rc = 0;
6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305

	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)
6306
			return -ENOMEM;
6307
		if (iocommand.Request.Type.Direction & XFER_WRITE) {
6308 6309 6310
			/* Copy the data into the buffer we created */
			if (copy_from_user(buff, iocommand.buf,
				iocommand.buf_size)) {
6311 6312
				rc = -EFAULT;
				goto out_kfree;
6313 6314 6315
			}
		} else {
			memset(buff, 0, iocommand.buf_size);
6316
		}
6317
	}
6318
	c = cmd_alloc(h);
6319

6320 6321
	/* Fill in the command type */
	c->cmd_type = CMD_IOCTL_PEND;
6322
	c->scsi_cmd = SCSI_CMD_BUSY;
6323 6324 6325 6326
	/* Fill in Command Header */
	c->Header.ReplyQueue = 0; /* unused in simple mode */
	if (iocommand.buf_size > 0) {	/* buffer to fill */
		c->Header.SGList = 1;
6327
		c->Header.SGTotal = cpu_to_le16(1);
6328 6329
	} else	{ /* no buffers to fill */
		c->Header.SGList = 0;
6330
		c->Header.SGTotal = cpu_to_le16(0);
6331 6332 6333 6334 6335 6336 6337 6338 6339
	}
	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) {
6340
		temp64 = pci_map_single(h->pdev, buff,
6341
			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
6342 6343 6344
		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);
6345 6346 6347
			rc = -ENOMEM;
			goto out;
		}
6348 6349 6350
		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 */
6351
	}
6352
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6353
					NO_TIMEOUT);
6354 6355
	if (iocommand.buf_size > 0)
		hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
6356
	check_ioctl_unit_attention(h, c);
6357 6358 6359 6360
	if (rc) {
		rc = -EIO;
		goto out;
	}
6361 6362 6363 6364 6365

	/* Copy the error information out */
	memcpy(&iocommand.error_info, c->err_info,
		sizeof(iocommand.error_info));
	if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6366 6367
		rc = -EFAULT;
		goto out;
6368
	}
6369
	if ((iocommand.Request.Type.Direction & XFER_READ) &&
6370
		iocommand.buf_size > 0) {
6371 6372
		/* Copy the data out of the buffer we created */
		if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6373 6374
			rc = -EFAULT;
			goto out;
6375 6376
		}
	}
6377
out:
6378
	cmd_free(h, c);
6379 6380 6381
out_kfree:
	kfree(buff);
	return rc;
6382 6383 6384 6385 6386 6387 6388 6389
}

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;
6390
	u64 temp64;
6391 6392
	BYTE sg_used = 0;
	int status = 0;
6393 6394
	u32 left;
	u32 sz;
6395 6396 6397 6398 6399 6400
	BYTE __user *data_ptr;

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
6401
	ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419
	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;
	}
6420
	if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6421 6422 6423
		status = -EINVAL;
		goto cleanup1;
	}
6424
	buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
6425 6426 6427 6428
	if (!buff) {
		status = -ENOMEM;
		goto cleanup1;
	}
6429
	buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443
	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;
		}
6444
		if (ioc->Request.Type.Direction & XFER_WRITE) {
6445
			if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6446
				status = -EFAULT;
6447 6448 6449 6450 6451 6452 6453 6454
				goto cleanup1;
			}
		} else
			memset(buff[sg_used], 0, sz);
		left -= sz;
		data_ptr += sz;
		sg_used++;
	}
6455
	c = cmd_alloc(h);
6456

6457
	c->cmd_type = CMD_IOCTL_PEND;
6458
	c->scsi_cmd = SCSI_CMD_BUSY;
6459
	c->Header.ReplyQueue = 0;
6460 6461
	c->Header.SGList = (u8) sg_used;
	c->Header.SGTotal = cpu_to_le16(sg_used);
6462 6463 6464 6465 6466
	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++) {
6467
			temp64 = pci_map_single(h->pdev, buff[i],
6468
				    buff_size[i], PCI_DMA_BIDIRECTIONAL);
6469 6470 6471 6472
			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);
6473 6474 6475
				hpsa_pci_unmap(h->pdev, c, i,
					PCI_DMA_BIDIRECTIONAL);
				status = -ENOMEM;
6476
				goto cleanup0;
6477
			}
6478 6479 6480
			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);
6481
		}
6482
		c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6483
	}
6484
	status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6485
						NO_TIMEOUT);
6486 6487
	if (sg_used)
		hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
6488
	check_ioctl_unit_attention(h, c);
6489 6490 6491 6492 6493
	if (status) {
		status = -EIO;
		goto cleanup0;
	}

6494 6495 6496 6497
	/* 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;
6498
		goto cleanup0;
6499
	}
6500
	if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
D
Don Brace 已提交
6501 6502
		int i;

6503 6504 6505 6506 6507
		/* 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;
6508
				goto cleanup0;
6509 6510 6511 6512 6513
			}
			ptr += buff_size[i];
		}
	}
	status = 0;
6514
cleanup0:
6515
	cmd_free(h, c);
6516 6517
cleanup1:
	if (buff) {
D
Don Brace 已提交
6518 6519
		int i;

6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535
		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);
}
6536

6537 6538 6539
/*
 * ioctl
 */
D
Don Brace 已提交
6540
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6541 6542 6543
{
	struct ctlr_info *h;
	void __user *argp = (void __user *)arg;
6544
	int rc;
6545 6546 6547 6548 6549 6550 6551

	h = sdev_to_hba(dev);

	switch (cmd) {
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
6552
		hpsa_scan_start(h->scsi_host);
6553 6554 6555 6556 6557 6558
		return 0;
	case CCISS_GETPCIINFO:
		return hpsa_getpciinfo_ioctl(h, argp);
	case CCISS_GETDRIVVER:
		return hpsa_getdrivver_ioctl(h, argp);
	case CCISS_PASSTHRU:
6559
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6560 6561
			return -EAGAIN;
		rc = hpsa_passthru_ioctl(h, argp);
6562
		atomic_inc(&h->passthru_cmds_avail);
6563
		return rc;
6564
	case CCISS_BIG_PASSTHRU:
6565
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6566 6567
			return -EAGAIN;
		rc = hpsa_big_passthru_ioctl(h, argp);
6568
		atomic_inc(&h->passthru_cmds_avail);
6569
		return rc;
6570 6571 6572 6573 6574
	default:
		return -ENOTTY;
	}
}

6575
static void hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
6576
				u8 reset_type)
6577 6578 6579 6580
{
	struct CommandList *c;

	c = cmd_alloc(h);
6581

6582 6583
	/* fill_cmd can't fail here, no data buffer to map */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6584 6585 6586 6587 6588 6589 6590 6591
		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.
	 */
6592
	return;
6593 6594
}

6595
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6596
	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6597 6598 6599 6600 6601
	int cmd_type)
{
	int pci_dir = XFER_NONE;

	c->cmd_type = CMD_IOCTL_PEND;
6602
	c->scsi_cmd = SCSI_CMD_BUSY;
6603 6604 6605
	c->Header.ReplyQueue = 0;
	if (buff != NULL && size > 0) {
		c->Header.SGList = 1;
6606
		c->Header.SGTotal = cpu_to_le16(1);
6607 6608
	} else {
		c->Header.SGList = 0;
6609
		c->Header.SGTotal = cpu_to_le16(0);
6610 6611 6612 6613 6614 6615 6616
	}
	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 */
6617
			if (page_code & VPD_PAGE) {
6618
				c->Request.CDB[1] = 0x01;
6619
				c->Request.CDB[2] = (page_code & 0xff);
6620 6621
			}
			c->Request.CDBLen = 6;
6622 6623
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6624 6625 6626 6627
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_INQUIRY;
			c->Request.CDB[4] = size & 0xFF;
			break;
6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638
		case RECEIVE_DIAGNOSTIC:
			c->Request.CDBLen = 6;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[1] = 1;
			c->Request.CDB[2] = 1;
			c->Request.CDB[3] = (size >> 8) & 0xFF;
			c->Request.CDB[4] = size & 0xFF;
			break;
6639 6640 6641 6642 6643 6644
		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;
6645 6646
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6647 6648 6649 6650 6651 6652 6653
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
S
Scott Teel 已提交
6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671
		case BMIC_SENSE_DIAG_OPTIONS:
			c->Request.CDBLen = 16;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			/* Spec says this should be BMIC_WRITE */
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
			break;
		case BMIC_SET_DIAG_OPTIONS:
			c->Request.CDBLen = 16;
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
			break;
6672 6673
		case HPSA_CACHE_FLUSH:
			c->Request.CDBLen = 12;
6674 6675 6676
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
6677 6678 6679
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6680 6681
			c->Request.CDB[7] = (size >> 8) & 0xFF;
			c->Request.CDB[8] = size & 0xFF;
6682 6683 6684
			break;
		case TEST_UNIT_READY:
			c->Request.CDBLen = 6;
6685 6686
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6687 6688
			c->Request.Timeout = 0;
			break;
6689 6690
		case HPSA_GET_RAID_MAP:
			c->Request.CDBLen = 12;
6691 6692
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6693 6694 6695 6696 6697 6698 6699 6700
			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;
6701 6702
		case BMIC_SENSE_CONTROLLER_PARAMETERS:
			c->Request.CDBLen = 10;
6703 6704
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6705 6706 6707 6708 6709 6710
			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;
6711 6712 6713 6714 6715 6716 6717 6718 6719 6720
		case BMIC_IDENTIFY_PHYSICAL_DEVICE:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
K
Kevin Barnett 已提交
6721 6722 6723 6724 6725 6726 6727 6728 6729 6730
		case BMIC_SENSE_SUBSYSTEM_INFORMATION:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
6731 6732 6733 6734 6735 6736 6737 6738 6739 6740
		case BMIC_SENSE_STORAGE_BOX_PARAMS:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
S
Scott Teel 已提交
6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756
		case BMIC_IDENTIFY_CONTROLLER:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[1] = 0;
			c->Request.CDB[2] = 0;
			c->Request.CDB[3] = 0;
			c->Request.CDB[4] = 0;
			c->Request.CDB[5] = 0;
			c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			c->Request.CDB[9] = 0;
			break;
6757 6758 6759 6760 6761 6762 6763
		default:
			dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
			BUG();
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {

S
Scott Teel 已提交
6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777
		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;
6778 6779
		case  HPSA_DEVICE_RESET_MSG:
			c->Request.CDBLen = 16;
6780 6781
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6782
			c->Request.Timeout = 0; /* Don't time out */
6783 6784
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] =  cmd;
6785
			c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
6786 6787 6788 6789 6790 6791
			/* 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;
6792
			break;
6793 6794 6795 6796 6797 6798 6799 6800 6801 6802
		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();
	}

6803
	switch (GET_DIR(c->Request.type_attr_dir)) {
6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815
	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;
	}
6816 6817 6818
	if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
		return -1;
	return 0;
6819 6820 6821 6822 6823 6824 6825 6826 6827
}

/*
 * 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;
6828 6829
	void __iomem *page_remapped = ioremap_nocache(page_base,
		page_offs + size);
6830 6831 6832 6833

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

6834
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
6835
{
6836
	return h->access.command_completed(h, q);
6837 6838
}

6839
static inline bool interrupt_pending(struct ctlr_info *h)
6840 6841 6842 6843 6844 6845
{
	return h->access.intr_pending(h);
}

static inline long interrupt_not_for_us(struct ctlr_info *h)
{
6846 6847
	return (h->access.intr_pending(h) == 0) ||
		(h->interrupts_enabled == 0);
6848 6849
}

6850 6851
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
	u32 raw_tag)
6852 6853 6854 6855 6856 6857 6858 6859
{
	if (unlikely(tag_index >= h->nr_cmds)) {
		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
		return 1;
	}
	return 0;
}

6860
static inline void finish_cmd(struct CommandList *c)
6861
{
6862
	dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
6863 6864
	if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
			|| c->cmd_type == CMD_IOACCEL2))
6865
		complete_scsi_command(c);
6866
	else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
6867
		complete(c->waiting);
6868 6869
}

6870
/* process completion of an indexed ("direct lookup") command */
6871
static inline void process_indexed_cmd(struct ctlr_info *h,
6872 6873 6874 6875 6876
	u32 raw_tag)
{
	u32 tag_index;
	struct CommandList *c;

6877
	tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
6878 6879 6880 6881
	if (!bad_tag(h, tag_index, raw_tag)) {
		c = h->cmd_pool + tag_index;
		finish_cmd(c);
	}
6882 6883
}

6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902
/* 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;
}

6903 6904 6905 6906 6907 6908
/*
 * 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)
6909
{
6910 6911 6912 6913 6914 6915 6916
	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;
6917 6918 6919 6920 6921 6922 6923
	u32 raw_tag;

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6924
	h->last_intr_timestamp = get_jiffies_64();
6925
	while (interrupt_pending(h)) {
6926
		raw_tag = get_next_completion(h, q);
6927
		while (raw_tag != FIFO_EMPTY)
6928
			raw_tag = next_command(h, q);
6929 6930 6931 6932
	}
	return IRQ_HANDLED;
}

6933
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
6934
{
6935
	struct ctlr_info *h = queue_to_hba(queue);
6936
	u32 raw_tag;
6937
	u8 q = *(u8 *) queue;
6938 6939 6940 6941

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

6942
	h->last_intr_timestamp = get_jiffies_64();
6943
	raw_tag = get_next_completion(h, q);
6944
	while (raw_tag != FIFO_EMPTY)
6945
		raw_tag = next_command(h, q);
6946 6947 6948
	return IRQ_HANDLED;
}

6949
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
6950
{
6951
	struct ctlr_info *h = queue_to_hba((u8 *) queue);
6952
	u32 raw_tag;
6953
	u8 q = *(u8 *) queue;
6954 6955 6956

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6957
	h->last_intr_timestamp = get_jiffies_64();
6958
	while (interrupt_pending(h)) {
6959
		raw_tag = get_next_completion(h, q);
6960
		while (raw_tag != FIFO_EMPTY) {
6961
			process_indexed_cmd(h, raw_tag);
6962
			raw_tag = next_command(h, q);
6963 6964 6965 6966 6967
		}
	}
	return IRQ_HANDLED;
}

6968
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
6969
{
6970
	struct ctlr_info *h = queue_to_hba(queue);
6971
	u32 raw_tag;
6972
	u8 q = *(u8 *) queue;
6973

6974
	h->last_intr_timestamp = get_jiffies_64();
6975
	raw_tag = get_next_completion(h, q);
6976
	while (raw_tag != FIFO_EMPTY) {
6977
		process_indexed_cmd(h, raw_tag);
6978
		raw_tag = next_command(h, q);
6979 6980 6981 6982
	}
	return IRQ_HANDLED;
}

6983 6984 6985 6986
/* 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.
 */
6987 6988
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
			unsigned char type)
6989 6990 6991 6992 6993 6994 6995 6996 6997 6998
{
	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
6999 7000
	__le32 paddr32;
	u32 tag;
7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014
	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);
7015
		return err;
7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027
	}

	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
7028
	paddr32 = cpu_to_le32(paddr64);
7029 7030 7031

	cmd->CommandHeader.ReplyQueue = 0;
	cmd->CommandHeader.SGList = 0;
7032
	cmd->CommandHeader.SGTotal = cpu_to_le16(0);
D
Don Brace 已提交
7033
	cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7034 7035 7036
	memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);

	cmd->Request.CDBLen = 16;
7037 7038
	cmd->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7039 7040 7041 7042
	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 */
7043
	cmd->ErrorDescriptor.Addr =
D
Don Brace 已提交
7044
			cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7045
	cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7046

D
Don Brace 已提交
7047
	writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7048 7049 7050

	for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
		tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
D
Don Brace 已提交
7051
		if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081
			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)

7082
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
D
Don Brace 已提交
7083
	void __iomem *vaddr, u32 use_doorbell)
7084 7085 7086 7087 7088 7089 7090 7091
{

	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");
7092
		writel(use_doorbell, vaddr + SA5_DOORBELL);
7093

7094
		/* PMC hardware guys tell us we need a 10 second delay after
7095 7096 7097 7098
		 * 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.
		 */
7099
		msleep(10000);
7100 7101 7102 7103 7104 7105 7106 7107 7108
	} 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." */
7109 7110 7111

		int rc = 0;

7112
		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7113

7114
		/* enter the D3hot power management state */
7115 7116 7117
		rc = pci_set_power_state(pdev, PCI_D3hot);
		if (rc)
			return rc;
7118 7119 7120 7121

		msleep(500);

		/* enter the D0 power management state */
7122 7123 7124
		rc = pci_set_power_state(pdev, PCI_D0);
		if (rc)
			return rc;
7125 7126 7127 7128 7129 7130 7131

		/*
		 * 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);
7132 7133 7134 7135
	}
	return 0;
}

7136
static void init_driver_version(char *driver_version, int len)
7137 7138
{
	memset(driver_version, 0, len);
7139
	strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7140 7141
}

7142
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157
{
	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;
}

7158 7159
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
					  unsigned char *driver_ver)
7160 7161 7162 7163 7164 7165 7166
{
	int i;

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

7167
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186
{

	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;
}
7187
/* This does a hard reset of the controller using PCI power management
7188
 * states or the using the doorbell register.
7189
 */
7190
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7191
{
7192 7193 7194 7195 7196
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
	void __iomem *vaddr;
	unsigned long paddr;
7197
	u32 misc_fw_support;
7198
	int rc;
7199
	struct CfgTable __iomem *cfgtable;
7200
	u32 use_doorbell;
7201
	u16 command_register;
7202

7203 7204
	/* For controllers as old as the P600, this is very nearly
	 * the same thing as
7205 7206 7207 7208 7209 7210
	 *
	 * 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);
	 *
7211 7212 7213
	 * 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.
7214
	 */
7215

7216 7217
	if (!ctlr_is_resettable(board_id)) {
		dev_warn(&pdev->dev, "Controller not resettable\n");
7218 7219
		return -ENODEV;
	}
7220 7221 7222 7223

	/* if controller is soft- but not hard resettable... */
	if (!ctlr_is_hard_resettable(board_id))
		return -ENOTSUPP; /* try soft reset later. */
7224

7225 7226 7227
	/* Save the PCI command register */
	pci_read_config_word(pdev, 4, &command_register);
	pci_save_state(pdev);
7228

7229 7230 7231 7232 7233 7234 7235
	/* 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;
7236

7237 7238 7239 7240 7241 7242 7243 7244 7245 7246 7247
	/* 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;
	}
7248 7249
	rc = write_driver_ver_to_cfgtable(cfgtable);
	if (rc)
7250
		goto unmap_cfgtable;
7251

7252 7253 7254
	/* If reset via doorbell register is supported, use that.
	 * There are two such methods.  Favor the newest method.
	 */
7255
	misc_fw_support = readl(&cfgtable->misc_fw_support);
7256 7257 7258 7259 7260 7261
	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) {
7262 7263
			dev_warn(&pdev->dev,
				"Soft reset not supported. Firmware update is required.\n");
7264
			rc = -ENOTSUPP; /* try soft reset */
7265 7266 7267
			goto unmap_cfgtable;
		}
	}
7268

7269 7270 7271
	rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
	if (rc)
		goto unmap_cfgtable;
7272

7273 7274
	pci_restore_state(pdev);
	pci_write_config_word(pdev, 4, command_register);
7275

7276 7277 7278 7279
	/* Some devices (notably the HP Smart Array 5i Controller)
	   need a little pause here */
	msleep(HPSA_POST_RESET_PAUSE_MSECS);

7280 7281 7282
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
	if (rc) {
		dev_warn(&pdev->dev,
7283
			"Failed waiting for board to become ready after hard reset\n");
7284 7285 7286
		goto unmap_cfgtable;
	}

7287 7288 7289 7290
	rc = controller_reset_failed(vaddr);
	if (rc < 0)
		goto unmap_cfgtable;
	if (rc) {
7291 7292 7293
		dev_warn(&pdev->dev, "Unable to successfully reset "
			"controller. Will try soft reset.\n");
		rc = -ENOTSUPP;
7294
	} else {
7295
		dev_info(&pdev->dev, "board ready after hard reset.\n");
7296 7297 7298 7299 7300 7301 7302 7303
	}

unmap_cfgtable:
	iounmap(cfgtable);

unmap_vaddr:
	iounmap(vaddr);
	return rc;
7304 7305 7306 7307 7308 7309 7310
}

/*
 *  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
7311
static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7312
{
7313
#ifdef HPSA_DEBUG
7314 7315 7316 7317 7318 7319 7320 7321 7322 7323 7324 7325 7326 7327 7328 7329 7330 7331 7332 7333
	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)));
7334
	dev_info(dev, "   Max outstanding commands = %d\n",
7335 7336 7337 7338 7339 7340 7341 7342 7343
	       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 */
7344
}
7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379 7380

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;
}

7381 7382
static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
{
7383 7384
	pci_free_irq_vectors(h->pdev);
	h->msix_vectors = 0;
7385 7386
}

7387
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
7388
 * controllers that are capable. If not, we use legacy INTx mode.
7389
 */
7390
static int hpsa_interrupt_mode(struct ctlr_info *h)
7391
{
7392 7393
	unsigned int flags = PCI_IRQ_LEGACY;
	int ret;
7394 7395

	/* Some boards advertise MSI but don't really support it */
7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407
	switch (h->board_id) {
	case 0x40700E11:
	case 0x40800E11:
	case 0x40820E11:
	case 0x40830E11:
		break;
	default:
		ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
				PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
		if (ret > 0) {
			h->msix_vectors = ret;
			return 0;
7408
		}
7409 7410 7411

		flags |= PCI_IRQ_MSI;
		break;
7412
	}
7413 7414 7415 7416 7417

	ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
	if (ret < 0)
		return ret;
	return 0;
7418 7419
}

7420 7421
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
				bool *legacy_board)
7422 7423 7424 7425 7426 7427 7428 7429 7430
{
	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;

7431 7432
	if (legacy_board)
		*legacy_board = false;
7433
	for (i = 0; i < ARRAY_SIZE(products); i++)
7434 7435 7436 7437
		if (*board_id == products[i].board_id) {
			if (products[i].access != &SA5A_access &&
			    products[i].access != &SA5B_access)
				return i;
7438 7439 7440 7441 7442 7443
			dev_warn(&pdev->dev,
				 "legacy board ID: 0x%08x\n",
				 *board_id);
			if (legacy_board)
			    *legacy_board = true;
			return i;
7444
		}
7445

7446
	dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x\n", *board_id);
7447 7448
	if (legacy_board)
		*legacy_board = true;
7449 7450 7451
	return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}

7452 7453
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar)
7454 7455 7456 7457
{
	int i;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7458
		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7459
			/* addressing mode bits already removed */
7460 7461
			*memory_bar = pci_resource_start(pdev, i);
			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7462 7463 7464
				*memory_bar);
			return 0;
		}
7465
	dev_warn(&pdev->dev, "no memory BAR found\n");
7466 7467 7468
	return -ENODEV;
}

7469 7470
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready)
7471
{
7472
	int i, iterations;
7473
	u32 scratchpad;
7474 7475 7476 7477
	if (wait_for_ready)
		iterations = HPSA_BOARD_READY_ITERATIONS;
	else
		iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7478

7479 7480 7481 7482 7483 7484 7485 7486 7487
	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;
		}
7488 7489
		msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
	}
7490
	dev_warn(&pdev->dev, "board not ready, timed out.\n");
7491 7492 7493
	return -ENODEV;
}

7494 7495 7496
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)
7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508
{
	*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
7509 7510
static void hpsa_free_cfgtables(struct ctlr_info *h)
{
R
Robert Elliott 已提交
7511
	if (h->transtable) {
R
Robert Elliott 已提交
7512
		iounmap(h->transtable);
R
Robert Elliott 已提交
7513 7514 7515
		h->transtable = NULL;
	}
	if (h->cfgtable) {
R
Robert Elliott 已提交
7516
		iounmap(h->cfgtable);
R
Robert Elliott 已提交
7517 7518
		h->cfgtable = NULL;
	}
R
Robert Elliott 已提交
7519 7520 7521 7522 7523
}

/* Find and map CISS config table and transfer table
+ * several items must be unmapped (freed) later
+ * */
7524
static int hpsa_find_cfgtables(struct ctlr_info *h)
7525
{
7526 7527 7528
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
7529
	u32 trans_offset;
7530
	int rc;
7531

7532 7533 7534 7535
	rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
		&cfg_base_addr_index, &cfg_offset);
	if (rc)
		return rc;
7536
	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7537
		       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7538 7539
	if (!h->cfgtable) {
		dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7540
		return -ENOMEM;
7541
	}
7542 7543 7544
	rc = write_driver_ver_to_cfgtable(h->cfgtable);
	if (rc)
		return rc;
7545
	/* Find performant mode table. */
7546
	trans_offset = readl(&h->cfgtable->TransMethodOffset);
7547 7548 7549
	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
7550 7551 7552
	if (!h->transtable) {
		dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
		hpsa_free_cfgtables(h);
7553
		return -ENOMEM;
R
Robert Elliott 已提交
7554
	}
7555 7556 7557
	return 0;
}

7558
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7559
{
7560 7561 7562 7563
#define MIN_MAX_COMMANDS 16
	BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);

	h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7564 7565 7566 7567 7568

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

7569 7570 7571 7572 7573 7574
	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;
7575 7576 7577
	}
}

7578 7579 7580 7581 7582 7583 7584 7585 7586
/* 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;
}

7587 7588 7589 7590
/* Interrogate the hardware for some limits:
 * max commands, max SG elements without chaining, and with chaining,
 * SG chain block size, etc.
 */
7591
static void hpsa_find_board_params(struct ctlr_info *h)
7592
{
7593
	hpsa_get_max_perf_mode_cmds(h);
7594
	h->nr_cmds = h->max_commands;
7595
	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7596
	h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7597 7598
	if (hpsa_supports_chained_sg_blocks(h)) {
		/* Limit in-command s/g elements to 32 save dma'able memory. */
7599
		h->max_cmd_sg_entries = 32;
7600
		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7601 7602
		h->maxsgentries--; /* save one for chain pointer */
	} else {
7603 7604 7605 7606 7607 7608
		/*
		 * 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;
7609
		h->maxsgentries = 31; /* default to traditional values */
7610
		h->chainsize = 0;
7611
	}
7612 7613 7614

	/* Find out what task management functions are supported and cache */
	h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7615 7616 7617 7618
	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");
7619 7620
	if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7621 7622
}

7623 7624
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
A
Akinobu Mita 已提交
7625
	if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7626
		dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7627 7628 7629 7630 7631
		return false;
	}
	return true;
}

7632
static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7633
{
7634
	u32 driver_support;
7635

7636
	driver_support = readl(&(h->cfgtable->driver_support));
A
Arnd Bergmann 已提交
7637 7638
	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
#ifdef CONFIG_X86
7639
	driver_support |= ENABLE_SCSI_PREFETCH;
7640
#endif
7641 7642
	driver_support |= ENABLE_UNIT_ATTN;
	writel(driver_support, &(h->cfgtable->driver_support));
7643 7644
}

7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657 7658
/* 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);
}

7659
static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7660 7661 7662 7663 7664
{
	int i;
	u32 doorbell_value;
	unsigned long flags;
	/* wait until the clear_event_notify bit 6 is cleared by controller. */
7665
	for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7666 7667 7668 7669
		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))
7670
			goto done;
7671
		/* delay and try again */
7672
		msleep(CLEAR_EVENT_WAIT_INTERVAL);
7673
	}
7674 7675 7676
	return -ENODEV;
done:
	return 0;
7677 7678
}

7679
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7680 7681
{
	int i;
7682 7683
	u32 doorbell_value;
	unsigned long flags;
7684 7685 7686 7687 7688

	/* 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.)
	 */
7689
	for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7690 7691
		if (h->remove_in_progress)
			goto done;
7692 7693 7694
		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
7695
		if (!(doorbell_value & CFGTBL_ChangeReq))
7696
			goto done;
7697
		/* delay and try again */
7698
		msleep(MODE_CHANGE_WAIT_INTERVAL);
7699
	}
7700 7701 7702
	return -ENODEV;
done:
	return 0;
7703 7704
}

7705
/* return -ENODEV or other reason on error, 0 on success */
7706
static int hpsa_enter_simple_mode(struct ctlr_info *h)
7707 7708 7709 7710 7711 7712 7713 7714
{
	u32 trans_support;

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

	h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
7715

7716 7717
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
7718
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
7719
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7720 7721
	if (hpsa_wait_for_mode_change_ack(h))
		goto error;
7722
	print_cfg_table(&h->pdev->dev, h->cfgtable);
7723 7724
	if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
		goto error;
7725
	h->transMethod = CFGTBL_Trans_Simple;
7726
	return 0;
7727
error:
7728
	dev_err(&h->pdev->dev, "failed to enter simple mode\n");
7729
	return -ENODEV;
7730 7731
}

R
Robert Elliott 已提交
7732 7733 7734 7735 7736
/* 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
7737
	h->vaddr = NULL;
R
Robert Elliott 已提交
7738
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
7739 7740 7741 7742
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
7743
	pci_disable_device(h->pdev);		/* pci_init 1 */
7744
	pci_release_regions(h->pdev);		/* pci_init 2 */
R
Robert Elliott 已提交
7745 7746 7747
}

/* several items must be freed later */
7748
static int hpsa_pci_init(struct ctlr_info *h)
7749
{
7750
	int prod_index, err;
7751
	bool legacy_board;
7752

7753
	prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id, &legacy_board);
7754
	if (prod_index < 0)
7755
		return prod_index;
7756 7757
	h->product_name = products[prod_index].product_name;
	h->access = *(products[prod_index].access);
7758
	h->legacy_board = legacy_board;
M
Matthew Garrett 已提交
7759 7760 7761
	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);

7762
	err = pci_enable_device(h->pdev);
7763
	if (err) {
R
Robert Elliott 已提交
7764
		dev_err(&h->pdev->dev, "failed to enable PCI device\n");
7765
		pci_disable_device(h->pdev);
7766 7767 7768
		return err;
	}

7769
	err = pci_request_regions(h->pdev, HPSA);
7770
	if (err) {
7771
		dev_err(&h->pdev->dev,
R
Robert Elliott 已提交
7772
			"failed to obtain PCI resources\n");
7773 7774
		pci_disable_device(h->pdev);
		return err;
7775
	}
7776 7777 7778

	pci_set_master(h->pdev);

7779 7780 7781
	err = hpsa_interrupt_mode(h);
	if (err)
		goto clean1;
7782
	err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
7783
	if (err)
R
Robert Elliott 已提交
7784
		goto clean2;	/* intmode+region, pci */
7785
	h->vaddr = remap_pci_mem(h->paddr, 0x250);
7786
	if (!h->vaddr) {
R
Robert Elliott 已提交
7787
		dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
7788
		err = -ENOMEM;
R
Robert Elliott 已提交
7789
		goto clean2;	/* intmode+region, pci */
7790
	}
7791
	err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
7792
	if (err)
R
Robert Elliott 已提交
7793
		goto clean3;	/* vaddr, intmode+region, pci */
7794 7795
	err = hpsa_find_cfgtables(h);
	if (err)
R
Robert Elliott 已提交
7796
		goto clean3;	/* vaddr, intmode+region, pci */
7797
	hpsa_find_board_params(h);
7798

7799
	if (!hpsa_CISS_signature_present(h)) {
7800
		err = -ENODEV;
R
Robert Elliott 已提交
7801
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
7802
	}
7803
	hpsa_set_driver_support_bits(h);
7804
	hpsa_p600_dma_prefetch_quirk(h);
7805 7806
	err = hpsa_enter_simple_mode(h);
	if (err)
R
Robert Elliott 已提交
7807
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
7808 7809
	return 0;

R
Robert Elliott 已提交
7810 7811 7812 7813
clean4:	/* cfgtables, vaddr, intmode+region, pci */
	hpsa_free_cfgtables(h);
clean3:	/* vaddr, intmode+region, pci */
	iounmap(h->vaddr);
R
Robert Elliott 已提交
7814
	h->vaddr = NULL;
R
Robert Elliott 已提交
7815 7816
clean2:	/* intmode+region, pci */
	hpsa_disable_interrupt_mode(h);
7817
clean1:
7818 7819 7820 7821
	/*
	 * call pci_disable_device before pci_release_regions per
	 * Documentation/PCI/pci.txt
	 */
R
Robert Elliott 已提交
7822
	pci_disable_device(h->pdev);
7823
	pci_release_regions(h->pdev);
7824 7825 7826
	return err;
}

7827
static void hpsa_hba_inquiry(struct ctlr_info *h)
7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842
{
	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;
	}
}

7843
static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
7844
{
7845
	int rc, i;
7846
	void __iomem *vaddr;
7847 7848 7849 7850

	if (!reset_devices)
		return 0;

7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866
	/* 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;
	}
7867

7868
	pci_set_master(pdev);
7869

7870 7871 7872 7873 7874 7875 7876 7877
	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);

7878
	/* Reset the controller with a PCI power-cycle or via doorbell */
7879
	rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
7880

7881 7882
	/* -ENOTSUPP here means we cannot reset the controller
	 * but it's already (and still) up and running in
7883 7884
	 * "performant mode".  Or, it might be 640x, which can't reset
	 * due to concerns about shared bbwc between 6402/6404 pair.
7885
	 */
7886
	if (rc)
7887
		goto out_disable;
7888 7889

	/* Now try to get the controller to respond to a no-op */
7890
	dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
7891 7892 7893 7894 7895 7896 7897
	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" : ""));
	}
7898 7899 7900 7901 7902

out_disable:

	pci_disable_device(pdev);
	return rc;
7903 7904
}

7905 7906 7907
static void hpsa_free_cmd_pool(struct ctlr_info *h)
{
	kfree(h->cmd_pool_bits);
R
Robert Elliott 已提交
7908 7909
	h->cmd_pool_bits = NULL;
	if (h->cmd_pool) {
7910 7911 7912 7913
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct CommandList),
				h->cmd_pool,
				h->cmd_pool_dhandle);
R
Robert Elliott 已提交
7914 7915 7916 7917
		h->cmd_pool = NULL;
		h->cmd_pool_dhandle = 0;
	}
	if (h->errinfo_pool) {
7918 7919 7920 7921
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct ErrorInfo),
				h->errinfo_pool,
				h->errinfo_pool_dhandle);
R
Robert Elliott 已提交
7922 7923 7924
		h->errinfo_pool = NULL;
		h->errinfo_pool_dhandle = 0;
	}
7925 7926
}

7927
static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941
{
	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__);
7942
		goto clean_up;
7943
	}
7944
	hpsa_preinitialize_commands(h);
7945
	return 0;
7946 7947 7948
clean_up:
	hpsa_free_cmd_pool(h);
	return -ENOMEM;
7949 7950
}

7951 7952 7953 7954 7955
/* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
static void hpsa_free_irqs(struct ctlr_info *h)
{
	int i;

7956
	if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
7957
		/* Single reply queue, only one irq to free */
7958
		free_irq(pci_irq_vector(h->pdev, 0), &h->q[h->intr_mode]);
7959
		h->q[h->intr_mode] = 0;
7960 7961 7962
		return;
	}

7963 7964
	for (i = 0; i < h->msix_vectors; i++) {
		free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
R
Robert Elliott 已提交
7965
		h->q[i] = 0;
7966
	}
7967 7968
	for (; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = 0;
7969 7970
}

7971 7972
/* returns 0 on success; cleans up and returns -Enn on error */
static int hpsa_request_irqs(struct ctlr_info *h,
7973 7974 7975
	irqreturn_t (*msixhandler)(int, void *),
	irqreturn_t (*intxhandler)(int, void *))
{
7976
	int rc, i;
7977

7978 7979 7980 7981 7982 7983 7984
	/*
	 * 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;

7985
	if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
7986
		/* If performant mode and MSI-X, use multiple reply queues */
7987
		for (i = 0; i < h->msix_vectors; i++) {
7988
			sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
7989
			rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
7990
					0, h->intrname[i],
7991
					&h->q[i]);
7992 7993 7994 7995 7996
			if (rc) {
				int j;

				dev_err(&h->pdev->dev,
					"failed to get irq %d for %s\n",
7997
				       pci_irq_vector(h->pdev, i), h->devname);
7998
				for (j = 0; j < i; j++) {
7999
					free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
8000 8001 8002 8003 8004 8005 8006
					h->q[j] = 0;
				}
				for (; j < MAX_REPLY_QUEUES; j++)
					h->q[j] = 0;
				return rc;
			}
		}
8007 8008
	} else {
		/* Use single reply pool */
8009 8010 8011 8012
		if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
			sprintf(h->intrname[0], "%s-msi%s", h->devname,
				h->msix_vectors ? "x" : "");
			rc = request_irq(pci_irq_vector(h->pdev, 0),
8013
				msixhandler, 0,
8014
				h->intrname[0],
8015 8016
				&h->q[h->intr_mode]);
		} else {
8017 8018
			sprintf(h->intrname[h->intr_mode],
				"%s-intx", h->devname);
8019
			rc = request_irq(pci_irq_vector(h->pdev, 0),
8020
				intxhandler, IRQF_SHARED,
8021
				h->intrname[0],
8022 8023 8024
				&h->q[h->intr_mode]);
		}
	}
8025
	if (rc) {
R
Robert Elliott 已提交
8026
		dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8027
		       pci_irq_vector(h->pdev, 0), h->devname);
R
Robert Elliott 已提交
8028
		hpsa_free_irqs(h);
8029 8030 8031 8032 8033
		return -ENODEV;
	}
	return 0;
}

8034
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8035
{
8036
	int rc;
8037
	hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER);
8038 8039

	dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8040 8041
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
	if (rc) {
8042
		dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8043
		return rc;
8044 8045 8046
	}

	dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8047 8048
	rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
	if (rc) {
8049 8050
		dev_warn(&h->pdev->dev, "Board failed to become ready "
			"after soft reset.\n");
8051
		return rc;
8052 8053 8054 8055 8056
	}

	return 0;
}

8057 8058 8059 8060 8061 8062 8063
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;
8064 8065 8066 8067
		pci_free_consistent(h->pdev,
					h->reply_queue_size,
					h->reply_queue[i].head,
					h->reply_queue[i].busaddr);
8068 8069 8070
		h->reply_queue[i].head = NULL;
		h->reply_queue[i].busaddr = 0;
	}
R
Robert Elliott 已提交
8071
	h->reply_queue_size = 0;
8072 8073
}

8074 8075
static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
R
Robert Elliott 已提交
8076 8077 8078 8079
	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 */
8080 8081 8082
	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 */
8083 8084 8085 8086 8087 8088 8089 8090 8091 8092
	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
8093
	kfree(h);				/* init_one 1 */
8094 8095
}

8096
/* Called when controller lockup detected. */
8097
static void fail_all_outstanding_cmds(struct ctlr_info *h)
8098
{
8099 8100
	int i, refcount;
	struct CommandList *c;
8101
	int failcount = 0;
8102

8103
	flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8104 8105
	for (i = 0; i < h->nr_cmds; i++) {
		c = h->cmd_pool + i;
8106 8107
		refcount = atomic_inc_return(&c->refcount);
		if (refcount > 1) {
8108
			c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8109
			finish_cmd(c);
8110
			atomic_dec(&h->commands_outstanding);
8111
			failcount++;
8112 8113
		}
		cmd_free(h, c);
8114
	}
8115 8116
	dev_warn(&h->pdev->dev,
		"failed %d commands in fail_all\n", failcount);
8117 8118
}

8119 8120
static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
{
8121
	int cpu;
8122

8123
	for_each_online_cpu(cpu) {
8124 8125 8126 8127 8128 8129 8130
		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 */
}

8131 8132 8133
static void controller_lockup_detected(struct ctlr_info *h)
{
	unsigned long flags;
8134
	u32 lockup_detected;
8135 8136 8137

	h->access.set_intr_mask(h, HPSA_INTR_OFF);
	spin_lock_irqsave(&h->lock, flags);
8138 8139 8140 8141
	lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
	if (!lockup_detected) {
		/* no heartbeat, but controller gave us a zero. */
		dev_warn(&h->pdev->dev,
8142 8143
			"lockup detected after %d but scratchpad register is zero\n",
			h->heartbeat_sample_interval / HZ);
8144 8145 8146
		lockup_detected = 0xffffffff;
	}
	set_lockup_detected_for_all_cpus(h, lockup_detected);
8147
	spin_unlock_irqrestore(&h->lock, flags);
8148 8149
	dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
			lockup_detected, h->heartbeat_sample_interval / HZ);
D
Don Brace 已提交
8150 8151 8152 8153
	if (lockup_detected == 0xffff0000) {
		dev_warn(&h->pdev->dev, "Telling controller to do a CHKPT\n");
		writel(DOORBELL_GENERATE_CHKPT, h->vaddr + SA5_DOORBELL);
	}
8154
	pci_disable_device(h->pdev);
8155
	fail_all_outstanding_cmds(h);
8156 8157
}

8158
static int detect_controller_lockup(struct ctlr_info *h)
8159 8160 8161 8162 8163 8164 8165 8166
{
	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 +
8167
				(h->heartbeat_sample_interval), now))
8168
		return false;
8169 8170 8171 8172 8173 8174 8175

	/*
	 * 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 +
8176
				(h->heartbeat_sample_interval), now))
8177
		return false;
8178 8179 8180 8181 8182 8183 8184

	/* 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);
8185
		return true;
8186 8187 8188 8189 8190
	}

	/* We're ok. */
	h->last_heartbeat = heartbeat;
	h->last_heartbeat_timestamp = now;
8191
	return false;
8192 8193
}

D
Don Brace 已提交
8194 8195 8196 8197 8198 8199 8200 8201 8202 8203
/*
 * Set ioaccel status for all ioaccel volumes.
 *
 * Called from monitor controller worker (hpsa_event_monitor_worker)
 *
 * A Volume (or Volumes that comprise an Array set may be undergoing a
 * transformation, so we will be turning off ioaccel for all volumes that
 * make up the Array.
 */
static void hpsa_set_ioaccel_status(struct ctlr_info *h)
8204
{
D
Don Brace 已提交
8205
	int rc;
8206
	int i;
D
Don Brace 已提交
8207 8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266
	u8 ioaccel_status;
	unsigned char *buf;
	struct hpsa_scsi_dev_t *device;

	if (!h)
		return;

	buf = kmalloc(64, GFP_KERNEL);
	if (!buf)
		return;

	/*
	 * Run through current device list used during I/O requests.
	 */
	for (i = 0; i < h->ndevices; i++) {
		device = h->dev[i];

		if (!device)
			continue;
		if (!device->scsi3addr)
			continue;
		if (!hpsa_vpd_page_supported(h, device->scsi3addr,
						HPSA_VPD_LV_IOACCEL_STATUS))
			continue;

		memset(buf, 0, 64);

		rc = hpsa_scsi_do_inquiry(h, device->scsi3addr,
					VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS,
					buf, 64);
		if (rc != 0)
			continue;

		ioaccel_status = buf[IOACCEL_STATUS_BYTE];
		device->offload_config =
				!!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
		if (device->offload_config)
			device->offload_to_be_enabled =
				!!(ioaccel_status & OFFLOAD_ENABLED_BIT);

		/*
		 * Immediately turn off ioaccel for any volume the
		 * controller tells us to. Some of the reasons could be:
		 *    transformation - change to the LVs of an Array.
		 *    degraded volume - component failure
		 *
		 * If ioaccel is to be re-enabled, re-enable later during the
		 * scan operation so the driver can get a fresh raidmap
		 * before turning ioaccel back on.
		 *
		 */
		if (!device->offload_to_be_enabled)
			device->offload_enabled = 0;
	}

	kfree(buf);
}

static void hpsa_ack_ctlr_events(struct ctlr_info *h)
{
8267 8268
	char *event_type;

8269 8270 8271
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
		return;

8272
	/* Ask the controller to clear the events we're handling. */
8273 8274
	if ((h->transMethod & (CFGTBL_Trans_io_accel1
			| CFGTBL_Trans_io_accel2)) &&
8275 8276 8277 8278 8279 8280 8281 8282 8283
		(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);
D
Don Brace 已提交
8284
		hpsa_set_ioaccel_status(h);
8285
		hpsa_drain_accel_commands(h);
8286 8287 8288 8289 8290 8291 8292 8293 8294 8295 8296 8297 8298 8299 8300 8301
		/* 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);
	}
8302
	return;
8303 8304 8305 8306
}

/* Check a register on the controller to see if there are configuration
 * changes (added/changed/removed logical drives, etc.) which mean that
8307 8308
 * we should rescan the controller for devices.
 * Also check flag for driver-initiated rescan.
8309
 */
8310
static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8311
{
D
Don Brace 已提交
8312 8313 8314 8315 8316
	if (h->drv_req_rescan) {
		h->drv_req_rescan = 0;
		return 1;
	}

8317
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8318
		return 0;
8319 8320

	h->events = readl(&(h->cfgtable->event_notify));
8321 8322
	return h->events & RESCAN_REQUIRED_EVENT_BITS;
}
8323

8324 8325 8326 8327 8328 8329 8330 8331 8332 8333 8334 8335 8336 8337
/*
 * 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);
8338 8339 8340 8341
		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);
8342
			return 1;
8343
		}
8344 8345 8346 8347
		spin_lock_irqsave(&h->offline_device_lock, flags);
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
	return 0;
8348 8349
}

8350 8351 8352 8353 8354 8355 8356 8357 8358 8359
static int hpsa_luns_changed(struct ctlr_info *h)
{
	int rc = 1; /* assume there are changes */
	struct ReportLUNdata *logdev = NULL;

	/* if we can't find out if lun data has changed,
	 * assume that it has.
	 */

	if (!h->lastlogicals)
8360
		return rc;
8361 8362

	logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
8363 8364 8365
	if (!logdev)
		return rc;

8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382
	if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
		dev_warn(&h->pdev->dev,
			"report luns failed, can't track lun changes.\n");
		goto out;
	}
	if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
		dev_info(&h->pdev->dev,
			"Lun changes detected.\n");
		memcpy(h->lastlogicals, logdev, sizeof(*logdev));
		goto out;
	} else
		rc = 0; /* no changes detected. */
out:
	kfree(logdev);
	return rc;
}

8383
static void hpsa_perform_rescan(struct ctlr_info *h)
8384
{
8385
	struct Scsi_Host *sh = NULL;
8386
	unsigned long flags;
8387

D
Don Brace 已提交
8388 8389 8390
	/*
	 * Do the scan after the reset
	 */
D
Don Brace 已提交
8391
	spin_lock_irqsave(&h->reset_lock, flags);
D
Don Brace 已提交
8392 8393
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
D
Don Brace 已提交
8394
		spin_unlock_irqrestore(&h->reset_lock, flags);
D
Don Brace 已提交
8395 8396
		return;
	}
D
Don Brace 已提交
8397
	spin_unlock_irqrestore(&h->reset_lock, flags);
D
Don Brace 已提交
8398

8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423
	sh = scsi_host_get(h->scsi_host);
	if (sh != NULL) {
		hpsa_scan_start(sh);
		scsi_host_put(sh);
		h->drv_req_rescan = 0;
	}
}

/*
 * watch for controller events
 */
static void hpsa_event_monitor_worker(struct work_struct *work)
{
	struct ctlr_info *h = container_of(to_delayed_work(work),
					struct ctlr_info, event_monitor_work);
	unsigned long flags;

	spin_lock_irqsave(&h->lock, flags);
	if (h->remove_in_progress) {
		spin_unlock_irqrestore(&h->lock, flags);
		return;
	}
	spin_unlock_irqrestore(&h->lock, flags);

	if (hpsa_ctlr_needs_rescan(h)) {
8424
		hpsa_ack_ctlr_events(h);
8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449
		hpsa_perform_rescan(h);
	}

	spin_lock_irqsave(&h->lock, flags);
	if (!h->remove_in_progress)
		schedule_delayed_work(&h->event_monitor_work,
					HPSA_EVENT_MONITOR_INTERVAL);
	spin_unlock_irqrestore(&h->lock, flags);
}

static void hpsa_rescan_ctlr_worker(struct work_struct *work)
{
	unsigned long flags;
	struct ctlr_info *h = container_of(to_delayed_work(work),
					struct ctlr_info, rescan_ctlr_work);

	spin_lock_irqsave(&h->lock, flags);
	if (h->remove_in_progress) {
		spin_unlock_irqrestore(&h->lock, flags);
		return;
	}
	spin_unlock_irqrestore(&h->lock, flags);

	if (h->drv_req_rescan || hpsa_offline_devices_ready(h)) {
		hpsa_perform_rescan(h);
8450 8451 8452 8453
	} else if (h->discovery_polling) {
		if (hpsa_luns_changed(h)) {
			dev_info(&h->pdev->dev,
				"driver discovery polling rescan.\n");
8454
			hpsa_perform_rescan(h);
8455
		}
8456
	}
8457
	spin_lock_irqsave(&h->lock, flags);
8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468 8469 8470 8471
	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))
8472
		return;
8473 8474 8475 8476

	spin_lock_irqsave(&h->lock, flags);
	if (!h->remove_in_progress)
		schedule_delayed_work(&h->monitor_ctlr_work,
8477 8478
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
8479 8480
}

8481 8482 8483 8484 8485
static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
						char *name)
{
	struct workqueue_struct *wq = NULL;

8486
	wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8487 8488 8489 8490 8491 8492
	if (!wq)
		dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);

	return wq;
}

8493
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8494
{
8495
	int dac, rc;
8496
	struct ctlr_info *h;
8497 8498
	int try_soft_reset = 0;
	unsigned long flags;
8499
	u32 board_id;
8500 8501 8502 8503

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

8504
	rc = hpsa_lookup_board_id(pdev, &board_id, NULL);
8505 8506 8507 8508 8509 8510
	if (rc < 0) {
		dev_warn(&pdev->dev, "Board ID not found\n");
		return rc;
	}

	rc = hpsa_init_reset_devices(pdev, board_id);
8511 8512 8513 8514 8515 8516 8517 8518 8519 8520 8521 8522 8523
	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:
8524

8525 8526 8527 8528 8529
	/* 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);
8530
	h = kzalloc(sizeof(*h), GFP_KERNEL);
R
Robert Elliott 已提交
8531 8532
	if (!h) {
		dev_err(&pdev->dev, "Failed to allocate controller head\n");
8533
		return -ENOMEM;
R
Robert Elliott 已提交
8534
	}
8535

8536
	h->pdev = pdev;
R
Robert Elliott 已提交
8537

8538
	h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8539
	INIT_LIST_HEAD(&h->offline_device_list);
8540
	spin_lock_init(&h->lock);
8541
	spin_lock_init(&h->offline_device_lock);
8542
	spin_lock_init(&h->scan_lock);
D
Don Brace 已提交
8543
	spin_lock_init(&h->reset_lock);
8544
	atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
8545 8546 8547

	/* Allocate and clear per-cpu variable lockup_detected */
	h->lockup_detected = alloc_percpu(u32);
8548
	if (!h->lockup_detected) {
R
Robert Elliott 已提交
8549
		dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8550
		rc = -ENOMEM;
8551
		goto clean1;	/* aer/h */
8552
	}
8553 8554
	set_lockup_detected_for_all_cpus(h, 0);

8555
	rc = hpsa_pci_init(h);
R
Robert Elliott 已提交
8556
	if (rc)
8557 8558 8559 8560 8561 8562 8563
		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 */
8564

8565
	sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8566 8567 8568 8569
	h->ctlr = number_of_controllers;
	number_of_controllers++;

	/* configure PCI DMA stuff */
8570 8571
	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc == 0) {
8572
		dac = 1;
8573 8574 8575 8576 8577 8578
	} 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");
8579
			goto clean3;	/* shost, pci, lu, aer/h */
8580
		}
8581 8582 8583 8584
	}

	/* make sure the board interrupts are off */
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
8585

R
Robert Elliott 已提交
8586 8587
	rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
	if (rc)
8588
		goto clean3;	/* shost, pci, lu, aer/h */
8589
	rc = hpsa_alloc_cmd_pool(h);
8590
	if (rc)
8591
		goto clean4;	/* irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8592 8593
	rc = hpsa_alloc_sg_chain_blocks(h);
	if (rc)
8594
		goto clean5;	/* cmd, irq, shost, pci, lu, aer/h */
8595
	init_waitqueue_head(&h->scan_wait_queue);
W
Webb Scales 已提交
8596 8597
	init_waitqueue_head(&h->event_sync_wait_queue);
	mutex_init(&h->reset_mutex);
8598
	h->scan_finished = 1; /* no scan currently in progress */
8599
	h->scan_waiting = 0;
8600 8601

	pci_set_drvdata(pdev, h);
8602
	h->ndevices = 0;
8603

8604
	spin_lock_init(&h->devlock);
R
Robert Elliott 已提交
8605 8606
	rc = hpsa_put_ctlr_into_performant_mode(h);
	if (rc)
8607 8608
		goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */

8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620
	/* 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 */
	}
8621

R
Robert Elliott 已提交
8622 8623
	/*
	 * At this point, the controller is ready to take commands.
8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638
	 * 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);
8639
		hpsa_free_irqs(h);
8640
		rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8641 8642
					hpsa_intx_discard_completions);
		if (rc) {
8643 8644
			dev_warn(&h->pdev->dev,
				"Failed to request_irq after soft reset.\n");
8645
			/*
8646 8647 8648 8649 8650 8651 8652 8653 8654
			 * 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
8655 8656
			 */
			goto clean3;
8657 8658 8659 8660 8661
		}

		rc = hpsa_kdump_soft_reset(h);
		if (rc)
			/* Neither hard nor soft reset worked, we're hosed. */
8662
			goto clean7;
8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678 8679 8680 8681 8682

		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)
8683
			/* don't goto clean, we already unallocated */
8684 8685 8686 8687
			return -ENODEV;

		goto reinit_after_soft_reset;
	}
8688

R
Robert Elliott 已提交
8689 8690
	/* Enable Accelerated IO path at driver layer */
	h->acciopath_status = 1;
8691 8692
	/* Disable discovery polling.*/
	h->discovery_polling = 0;
8693

8694

8695 8696 8697
	/* Turn the interrupts on so we can service requests */
	h->access.set_intr_mask(h, HPSA_INTR_ON);

8698
	hpsa_hba_inquiry(h);
8699

8700 8701 8702 8703 8704
	h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
	if (!h->lastlogicals)
		dev_info(&h->pdev->dev,
			"Can't track change to report lun data\n");

8705 8706 8707 8708 8709
	/* hook into SCSI subsystem */
	rc = hpsa_scsi_add_host(h);
	if (rc)
		goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */

8710 8711 8712 8713 8714
	/* 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);
8715 8716 8717
	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);
8718 8719 8720
	INIT_DELAYED_WORK(&h->event_monitor_work, hpsa_event_monitor_worker);
	schedule_delayed_work(&h->event_monitor_work,
				HPSA_EVENT_MONITOR_INTERVAL);
8721
	return 0;
8722

8723
clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
R
Robert Elliott 已提交
8724 8725 8726
	hpsa_free_performant_mode(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8727
	hpsa_free_sg_chain_blocks(h);
8728
clean5: /* cmd, irq, shost, pci, lu, aer/h */
8729
	hpsa_free_cmd_pool(h);
8730
clean4: /* irq, shost, pci, lu, aer/h */
8731
	hpsa_free_irqs(h);
8732 8733 8734 8735
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
8736
	hpsa_free_pci_init(h);
8737
clean2: /* lu, aer/h */
R
Robert Elliott 已提交
8738 8739 8740 8741 8742 8743
	if (h->lockup_detected) {
		free_percpu(h->lockup_detected);
		h->lockup_detected = NULL;
	}
clean1:	/* wq/aer/h */
	if (h->resubmit_wq) {
8744
		destroy_workqueue(h->resubmit_wq);
R
Robert Elliott 已提交
8745 8746 8747
		h->resubmit_wq = NULL;
	}
	if (h->rescan_ctlr_wq) {
8748
		destroy_workqueue(h->rescan_ctlr_wq);
R
Robert Elliott 已提交
8749 8750
		h->rescan_ctlr_wq = NULL;
	}
8751
	kfree(h);
8752
	return rc;
8753 8754 8755 8756 8757 8758
}

static void hpsa_flush_cache(struct ctlr_info *h)
{
	char *flush_buf;
	struct CommandList *c;
8759
	int rc;
8760

8761
	if (unlikely(lockup_detected(h)))
8762
		return;
8763 8764 8765 8766
	flush_buf = kzalloc(4, GFP_KERNEL);
	if (!flush_buf)
		return;

8767
	c = cmd_alloc(h);
8768

8769 8770 8771 8772
	if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD)) {
		goto out;
	}
8773
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8774
					PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
8775 8776
	if (rc)
		goto out;
8777
	if (c->err_info->CommandStatus != 0)
8778
out:
8779 8780
		dev_warn(&h->pdev->dev,
			"error flushing cache on controller\n");
8781
	cmd_free(h, c);
8782 8783 8784
	kfree(flush_buf);
}

S
Scott Teel 已提交
8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796 8797 8798
/* Make controller gather fresh report lun data each time we
 * send down a report luns request
 */
static void hpsa_disable_rld_caching(struct ctlr_info *h)
{
	u32 *options;
	struct CommandList *c;
	int rc;

	/* Don't bother trying to set diag options if locked up */
	if (unlikely(h->lockup_detected))
		return;

	options = kzalloc(sizeof(*options), GFP_KERNEL);
8799
	if (!options)
S
Scott Teel 已提交
8800 8801 8802 8803 8804 8805 8806 8807 8808 8809
		return;

	c = cmd_alloc(h);

	/* first, get the current diag options settings */
	if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8810
		PCI_DMA_FROMDEVICE, NO_TIMEOUT);
S
Scott Teel 已提交
8811 8812 8813 8814 8815 8816 8817 8818 8819 8820 8821
	if ((rc != 0) || (c->err_info->CommandStatus != 0))
		goto errout;

	/* Now, set the bit for disabling the RLD caching */
	*options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;

	if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8822
		PCI_DMA_TODEVICE, NO_TIMEOUT);
S
Scott Teel 已提交
8823 8824 8825 8826 8827 8828 8829 8830 8831
	if ((rc != 0)  || (c->err_info->CommandStatus != 0))
		goto errout;

	/* Now verify that it got set: */
	if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD))
		goto errout;

	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8832
		PCI_DMA_FROMDEVICE, NO_TIMEOUT);
S
Scott Teel 已提交
8833 8834 8835
	if ((rc != 0)  || (c->err_info->CommandStatus != 0))
		goto errout;

D
Dan Carpenter 已提交
8836
	if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
S
Scott Teel 已提交
8837 8838 8839 8840 8841 8842 8843 8844 8845 8846
		goto out;

errout:
	dev_err(&h->pdev->dev,
			"Error: failed to disable report lun data caching.\n");
out:
	cmd_free(h, c);
	kfree(options);
}

8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857
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
8858
	hpsa_free_irqs(h);			/* init_one 4 */
8859
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
8860 8861
}

8862
static void hpsa_free_device_info(struct ctlr_info *h)
8863 8864 8865
{
	int i;

R
Robert Elliott 已提交
8866
	for (i = 0; i < h->ndevices; i++) {
8867
		kfree(h->dev[i]);
R
Robert Elliott 已提交
8868 8869
		h->dev[i] = NULL;
	}
8870 8871
}

8872
static void hpsa_remove_one(struct pci_dev *pdev)
8873 8874
{
	struct ctlr_info *h;
8875
	unsigned long flags;
8876 8877

	if (pci_get_drvdata(pdev) == NULL) {
8878
		dev_err(&pdev->dev, "unable to remove device\n");
8879 8880 8881
		return;
	}
	h = pci_get_drvdata(pdev);
8882 8883 8884 8885 8886

	/* 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);
8887 8888
	cancel_delayed_work_sync(&h->monitor_ctlr_work);
	cancel_delayed_work_sync(&h->rescan_ctlr_work);
8889
	cancel_delayed_work_sync(&h->event_monitor_work);
8890 8891
	destroy_workqueue(h->rescan_ctlr_wq);
	destroy_workqueue(h->resubmit_wq);
8892

8893 8894
	hpsa_delete_sas_host(h);

D
Don Brace 已提交
8895 8896 8897 8898 8899 8900 8901 8902
	/*
	 * 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
8903
	/* includes hpsa_free_irqs - init_one 4 */
R
Robert Elliott 已提交
8904
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
8905
	hpsa_shutdown(pdev);
8906

R
Robert Elliott 已提交
8907 8908
	hpsa_free_device_info(h);		/* scan */

8909 8910 8911
	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
8912 8913 8914
	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 */
8915
	kfree(h->lastlogicals);
R
Robert Elliott 已提交
8916 8917

	/* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
R
Robert Elliott 已提交
8918

8919 8920 8921
	scsi_host_put(h->scsi_host);			/* init_one 3 */
	h->scsi_host = NULL;				/* init_one 3 */

R
Robert Elliott 已提交
8922
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
8923
	hpsa_free_pci_init(h);				/* init_one 2.5 */
R
Robert Elliott 已提交
8924

R
Robert Elliott 已提交
8925 8926 8927
	free_percpu(h->lockup_detected);		/* init_one 2 */
	h->lockup_detected = NULL;			/* init_one 2 */
	/* (void) pci_disable_pcie_error_reporting(pdev); */	/* init_one 1 */
K
Kevin Barnett 已提交
8928

R
Robert Elliott 已提交
8929
	kfree(h);					/* init_one 1 */
8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943
}

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 = {
8944
	.name = HPSA,
8945
	.probe = hpsa_init_one,
8946
	.remove = hpsa_remove_one,
8947 8948 8949 8950 8951 8952
	.id_table = hpsa_pci_device_id,	/* id_table */
	.shutdown = hpsa_shutdown,
	.suspend = hpsa_suspend,
	.resume = hpsa_resume,
};

8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965
/* 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
8966
	int nsgs, int min_blocks, u32 *bucket_map)
8967 8968 8969 8970 8971 8972
{
	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 */
8973
		size = i + min_blocks;
8974 8975
		b = num_buckets; /* Assume the biggest bucket */
		/* Find the bucket that is just big enough */
8976
		for (j = 0; j < num_buckets; j++) {
8977 8978 8979 8980 8981 8982 8983 8984 8985 8986
			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
8987 8988 8989 8990
/*
 * return -ENODEV on err, 0 on success (or no action)
 * allocates numerous items that must be freed later
 */
8991
static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
8992
{
8993 8994
	int i;
	unsigned long register_value;
8995 8996
	unsigned long transMethod = CFGTBL_Trans_Performant |
			(trans_support & CFGTBL_Trans_use_short_tags) |
8997 8998 8999
				CFGTBL_Trans_enable_directed_msix |
			(trans_support & (CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_io_accel2));
9000
	struct access_method access = SA5_performant_access;
9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011

	/* 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.
9012
	 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9013 9014 9015 9016 9017 9018
	 * 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.
	 */
9019
	int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9020 9021 9022 9023 9024 9025 9026 9027 9028 9029
#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);
9030
	BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9031 9032 9033 9034 9035 9036
	/*  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
	 */

9037 9038 9039 9040 9041 9042 9043
	/* 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;

9044
	/* Controller spec: zero out this buffer. */
9045 9046
	for (i = 0; i < h->nreply_queues; i++)
		memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9047

9048 9049
	bft[7] = SG_ENTRIES_IN_CMD + 4;
	calc_bucket_map(bft, ARRAY_SIZE(bft),
9050
				SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9051 9052 9053 9054 9055
	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);
9056
	writel(h->nreply_queues, &h->transtable->RepQCount);
9057 9058
	writel(0, &h->transtable->RepQCtrAddrLow32);
	writel(0, &h->transtable->RepQCtrAddrHigh32);
9059 9060 9061

	for (i = 0; i < h->nreply_queues; i++) {
		writel(0, &h->transtable->RepQAddr[i].upper);
9062
		writel(h->reply_queue[i].busaddr,
9063 9064 9065
			&h->transtable->RepQAddr[i].lower);
	}

9066
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9067 9068 9069 9070 9071 9072 9073 9074
	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);
9075 9076
	} else
		if (trans_support & CFGTBL_Trans_io_accel2)
9077
			access = SA5_ioaccel_mode2_access;
9078
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9079 9080 9081 9082 9083
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - doorbell timeout\n");
		return -ENODEV;
	}
9084 9085
	register_value = readl(&(h->cfgtable->TransportActive));
	if (!(register_value & CFGTBL_Trans_Performant)) {
9086 9087
		dev_err(&h->pdev->dev,
			"performant mode problem - transport not active\n");
9088
		return -ENODEV;
9089
	}
9090
	/* Change the access methods to the performant access methods */
9091 9092 9093
	h->access = access;
	h->transMethod = transMethod;

9094 9095
	if (!((trans_support & CFGTBL_Trans_io_accel1) ||
		(trans_support & CFGTBL_Trans_io_accel2)))
9096
		return 0;
9097

9098 9099 9100 9101 9102 9103 9104 9105 9106 9107
	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);
9108

9109
		/* initialize all reply queue entries to unused */
9110 9111 9112 9113
		for (i = 0; i < h->nreply_queues; i++)
			memset(h->reply_queue[i].head,
				(u8) IOACCEL_MODE1_REPLY_UNUSED,
				h->reply_queue_size);
9114

9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125
		/* 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
9126 9127
			cp->host_context_flags =
				cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9128 9129
			cp->timeout_sec = 0;
			cp->ReplyQueue = 0;
9130
			cp->tag =
9131
				cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9132 9133
			cp->host_addr =
				cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9134 9135 9136 9137 9138 9139 9140 9141 9142 9143 9144 9145 9146 9147 9148 9149 9150 9151 9152 9153 9154 9155 9156 9157
					(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]);
9158
	}
9159
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9160 9161 9162 9163 9164 9165
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - enabling ioaccel mode\n");
		return -ENODEV;
	}
	return 0;
9166 9167
}

9168 9169 9170
/* 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
9171
	if (h->ioaccel_cmd_pool) {
9172 9173 9174 9175
		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
9176 9177 9178
		h->ioaccel_cmd_pool = NULL;
		h->ioaccel_cmd_pool_dhandle = 0;
	}
9179
	kfree(h->ioaccel1_blockFetchTable);
R
Robert Elliott 已提交
9180
	h->ioaccel1_blockFetchTable = NULL;
9181 9182
}

9183 9184
/* Allocate ioaccel1 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9185
{
9186 9187 9188 9189 9190
	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;

9191 9192 9193 9194 9195 9196 9197 9198 9199 9200 9201 9202
	/* 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 =
9203
		kmalloc(((h->ioaccel_maxsg + 1) *
9204 9205 9206 9207 9208 9209 9210 9211 9212 9213 9214
				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:
9215
	hpsa_free_ioaccel1_cmd_and_bft(h);
9216
	return -ENOMEM;
9217 9218
}

9219 9220 9221
/* Free ioaccel2 mode command blocks and block fetch table */
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
9222 9223
	hpsa_free_ioaccel2_sg_chain_blocks(h);

R
Robert Elliott 已提交
9224
	if (h->ioaccel2_cmd_pool) {
9225 9226 9227 9228
		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
9229 9230 9231
		h->ioaccel2_cmd_pool = NULL;
		h->ioaccel2_cmd_pool_dhandle = 0;
	}
9232
	kfree(h->ioaccel2_blockFetchTable);
R
Robert Elliott 已提交
9233
	h->ioaccel2_blockFetchTable = NULL;
9234 9235
}

9236 9237
/* Allocate ioaccel2 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9238
{
9239 9240
	int rc;

9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259
	/* 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) ||
9260 9261 9262 9263 9264 9265 9266
		(h->ioaccel2_blockFetchTable == NULL)) {
		rc = -ENOMEM;
		goto clean_up;
	}

	rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
	if (rc)
9267 9268 9269 9270 9271 9272 9273
		goto clean_up;

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

clean_up:
9274
	hpsa_free_ioaccel2_cmd_and_bft(h);
9275
	return rc;
9276 9277
}

R
Robert Elliott 已提交
9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291
/* 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)
9292 9293
{
	u32 trans_support;
9294 9295
	unsigned long transMethod = CFGTBL_Trans_Performant |
					CFGTBL_Trans_use_short_tags;
R
Robert Elliott 已提交
9296
	int i, rc;
9297

9298
	if (hpsa_simple_mode)
R
Robert Elliott 已提交
9299
		return 0;
9300

9301 9302
	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & PERFORMANT_MODE))
R
Robert Elliott 已提交
9303
		return 0;
9304

9305 9306 9307 9308
	/* 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
9309 9310 9311 9312 9313
		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 |
9314
				CFGTBL_Trans_enable_directed_msix;
R
Robert Elliott 已提交
9315 9316 9317
		rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
		if (rc)
			return rc;
9318 9319
	}

9320
	h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
9321
	hpsa_get_max_perf_mode_cmds(h);
9322
	/* Performant mode ring buffer and supporting data structures */
9323
	h->reply_queue_size = h->max_commands * sizeof(u64);
9324

9325
	for (i = 0; i < h->nreply_queues; i++) {
9326 9327 9328
		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
9329 9330 9331 9332
		if (!h->reply_queue[i].head) {
			rc = -ENOMEM;
			goto clean1;	/* rq, ioaccel */
		}
9333 9334 9335 9336 9337
		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;
	}

9338
	/* Need a block fetch table for performant mode */
9339
	h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9340
				sizeof(u32)), GFP_KERNEL);
R
Robert Elliott 已提交
9341 9342 9343 9344
	if (!h->blockFetchTable) {
		rc = -ENOMEM;
		goto clean1;	/* rq, ioaccel */
	}
9345

R
Robert Elliott 已提交
9346 9347 9348 9349
	rc = hpsa_enter_performant_mode(h, trans_support);
	if (rc)
		goto clean2;	/* bft, rq, ioaccel */
	return 0;
9350

R
Robert Elliott 已提交
9351
clean2:	/* bft, rq, ioaccel */
9352
	kfree(h->blockFetchTable);
R
Robert Elliott 已提交
9353 9354 9355 9356 9357 9358
	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;
9359 9360
}

9361
static int is_accelerated_cmd(struct CommandList *c)
9362
{
9363 9364 9365 9366 9367 9368
	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;
9369
	int i, accel_cmds_out;
9370
	int refcount;
9371

9372
	do { /* wait for all outstanding ioaccel commands to drain out */
9373
		accel_cmds_out = 0;
9374 9375
		for (i = 0; i < h->nr_cmds; i++) {
			c = h->cmd_pool + i;
9376 9377 9378 9379
			refcount = atomic_inc_return(&c->refcount);
			if (refcount > 1) /* Command is allocated */
				accel_cmds_out += is_accelerated_cmd(c);
			cmd_free(h, c);
9380
		}
9381
		if (accel_cmds_out <= 0)
9382
			break;
9383 9384 9385 9386
		msleep(100);
	} while (1);
}

K
Kevin Barnett 已提交
9387 9388 9389 9390 9391 9392 9393 9394 9395 9396 9397 9398 9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410 9411 9412 9413 9414 9415 9416 9417
static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
				struct hpsa_sas_port *hpsa_sas_port)
{
	struct hpsa_sas_phy *hpsa_sas_phy;
	struct sas_phy *phy;

	hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
	if (!hpsa_sas_phy)
		return NULL;

	phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
		hpsa_sas_port->next_phy_index);
	if (!phy) {
		kfree(hpsa_sas_phy);
		return NULL;
	}

	hpsa_sas_port->next_phy_index++;
	hpsa_sas_phy->phy = phy;
	hpsa_sas_phy->parent_port = hpsa_sas_port;

	return hpsa_sas_phy;
}

static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
{
	struct sas_phy *phy = hpsa_sas_phy->phy;

	sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
	if (hpsa_sas_phy->added_to_port)
		list_del(&hpsa_sas_phy->phy_list_entry);
9418
	sas_phy_delete(phy);
K
Kevin Barnett 已提交
9419 9420 9421 9422 9423 9424 9425 9426 9427 9428 9429 9430 9431 9432 9433 9434 9435 9436 9437 9438 9439 9440 9441 9442 9443 9444 9445 9446 9447 9448 9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467 9468 9469 9470 9471 9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499 9500 9501 9502 9503 9504 9505 9506 9507 9508 9509 9510 9511 9512 9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523 9524 9525 9526 9527 9528 9529 9530 9531 9532 9533 9534 9535 9536 9537 9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563 9564 9565 9566 9567 9568 9569 9570 9571 9572 9573 9574 9575
	kfree(hpsa_sas_phy);
}

static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_phy *phy;
	struct sas_identify *identify;

	hpsa_sas_port = hpsa_sas_phy->parent_port;
	phy = hpsa_sas_phy->phy;

	identify = &phy->identify;
	memset(identify, 0, sizeof(*identify));
	identify->sas_address = hpsa_sas_port->sas_address;
	identify->device_type = SAS_END_DEVICE;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;
	phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;

	rc = sas_phy_add(hpsa_sas_phy->phy);
	if (rc)
		return rc;

	sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
	list_add_tail(&hpsa_sas_phy->phy_list_entry,
			&hpsa_sas_port->phy_list_head);
	hpsa_sas_phy->added_to_port = true;

	return 0;
}

static int
	hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
				struct sas_rphy *rphy)
{
	struct sas_identify *identify;

	identify = &rphy->identify;
	identify->sas_address = hpsa_sas_port->sas_address;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;

	return sas_rphy_add(rphy);
}

static struct hpsa_sas_port
	*hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
				u64 sas_address)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_port *port;

	hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
	if (!hpsa_sas_port)
		return NULL;

	INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
	hpsa_sas_port->parent_node = hpsa_sas_node;

	port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
	if (!port)
		goto free_hpsa_port;

	rc = sas_port_add(port);
	if (rc)
		goto free_sas_port;

	hpsa_sas_port->port = port;
	hpsa_sas_port->sas_address = sas_address;
	list_add_tail(&hpsa_sas_port->port_list_entry,
			&hpsa_sas_node->port_list_head);

	return hpsa_sas_port;

free_sas_port:
	sas_port_free(port);
free_hpsa_port:
	kfree(hpsa_sas_port);

	return NULL;
}

static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
{
	struct hpsa_sas_phy *hpsa_sas_phy;
	struct hpsa_sas_phy *next;

	list_for_each_entry_safe(hpsa_sas_phy, next,
			&hpsa_sas_port->phy_list_head, phy_list_entry)
		hpsa_free_sas_phy(hpsa_sas_phy);

	sas_port_delete(hpsa_sas_port->port);
	list_del(&hpsa_sas_port->port_list_entry);
	kfree(hpsa_sas_port);
}

static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
{
	struct hpsa_sas_node *hpsa_sas_node;

	hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
	if (hpsa_sas_node) {
		hpsa_sas_node->parent_dev = parent_dev;
		INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
	}

	return hpsa_sas_node;
}

static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
{
	struct hpsa_sas_port *hpsa_sas_port;
	struct hpsa_sas_port *next;

	if (!hpsa_sas_node)
		return;

	list_for_each_entry_safe(hpsa_sas_port, next,
			&hpsa_sas_node->port_list_head, port_list_entry)
		hpsa_free_sas_port(hpsa_sas_port);

	kfree(hpsa_sas_node);
}

static struct hpsa_scsi_dev_t
	*hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
					struct sas_rphy *rphy)
{
	int i;
	struct hpsa_scsi_dev_t *device;

	for (i = 0; i < h->ndevices; i++) {
		device = h->dev[i];
		if (!device->sas_port)
			continue;
		if (device->sas_port->rphy == rphy)
			return device;
	}

	return NULL;
}

static int hpsa_add_sas_host(struct ctlr_info *h)
{
	int rc;
	struct device *parent_dev;
	struct hpsa_sas_node *hpsa_sas_node;
	struct hpsa_sas_port *hpsa_sas_port;
	struct hpsa_sas_phy *hpsa_sas_phy;

9576
	parent_dev = &h->scsi_host->shost_dev;
K
Kevin Barnett 已提交
9577 9578 9579 9580 9581 9582 9583 9584 9585 9586 9587 9588 9589 9590 9591 9592 9593 9594 9595 9596 9597 9598 9599 9600 9601 9602 9603 9604 9605 9606 9607 9608 9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619 9620 9621 9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639 9640 9641 9642 9643 9644 9645 9646 9647 9648 9649 9650 9651 9652 9653 9654 9655 9656 9657 9658 9659 9660 9661 9662 9663 9664 9665 9666

	hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
	if (!hpsa_sas_node)
		return -ENOMEM;

	hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
	if (!hpsa_sas_port) {
		rc = -ENODEV;
		goto free_sas_node;
	}

	hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
	if (!hpsa_sas_phy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
	if (rc)
		goto free_sas_phy;

	h->sas_host = hpsa_sas_node;

	return 0;

free_sas_phy:
	hpsa_free_sas_phy(hpsa_sas_phy);
free_sas_port:
	hpsa_free_sas_port(hpsa_sas_port);
free_sas_node:
	hpsa_free_sas_node(hpsa_sas_node);

	return rc;
}

static void hpsa_delete_sas_host(struct ctlr_info *h)
{
	hpsa_free_sas_node(h->sas_host);
}

static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
				struct hpsa_scsi_dev_t *device)
{
	int rc;
	struct hpsa_sas_port *hpsa_sas_port;
	struct sas_rphy *rphy;

	hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
	if (!hpsa_sas_port)
		return -ENOMEM;

	rphy = sas_end_device_alloc(hpsa_sas_port->port);
	if (!rphy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	hpsa_sas_port->rphy = rphy;
	device->sas_port = hpsa_sas_port;

	rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
	if (rc)
		goto free_sas_port;

	return 0;

free_sas_port:
	hpsa_free_sas_port(hpsa_sas_port);
	device->sas_port = NULL;

	return rc;
}

static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
{
	if (device->sas_port) {
		hpsa_free_sas_port(device->sas_port);
		device->sas_port = NULL;
	}
}

static int
hpsa_sas_get_linkerrors(struct sas_phy *phy)
{
	return 0;
}

static int
hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
{
9667
	*identifier = rphy->identify.sas_address;
K
Kevin Barnett 已提交
9668 9669 9670 9671 9672 9673 9674 9675 9676 9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689 9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716
	return 0;
}

static int
hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
{
	return -ENXIO;
}

static int
hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
{
	return 0;
}

static int
hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
{
	return 0;
}

static int
hpsa_sas_phy_setup(struct sas_phy *phy)
{
	return 0;
}

static void
hpsa_sas_phy_release(struct sas_phy *phy)
{
}

static int
hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
{
	return -EINVAL;
}

static struct sas_function_template hpsa_sas_transport_functions = {
	.get_linkerrors = hpsa_sas_get_linkerrors,
	.get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
	.get_bay_identifier = hpsa_sas_get_bay_identifier,
	.phy_reset = hpsa_sas_phy_reset,
	.phy_enable = hpsa_sas_phy_enable,
	.phy_setup = hpsa_sas_phy_setup,
	.phy_release = hpsa_sas_phy_release,
	.set_phy_speed = hpsa_sas_phy_speed,
};

9717 9718 9719 9720 9721 9722
/*
 *  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)
{
K
Kevin Barnett 已提交
9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735
	int rc;

	hpsa_sas_transport_template =
		sas_attach_transport(&hpsa_sas_transport_functions);
	if (!hpsa_sas_transport_template)
		return -ENODEV;

	rc = pci_register_driver(&hpsa_pci_driver);

	if (rc)
		sas_release_transport(hpsa_sas_transport_template);

	return rc;
9736 9737 9738 9739 9740
}

static void __exit hpsa_cleanup(void)
{
	pci_unregister_driver(&hpsa_pci_driver);
K
Kevin Barnett 已提交
9741
	sas_release_transport(hpsa_sas_transport_template);
9742 9743
}

9744 9745
static void __attribute__((unused)) verify_offsets(void)
{
9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767
#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

9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789
#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

9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814
#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);
9815
	VERIFY_OFFSET(tag, 0x68);
9816 9817 9818 9819 9820 9821
	VERIFY_OFFSET(host_addr, 0x70);
	VERIFY_OFFSET(CISS_LUN, 0x78);
	VERIFY_OFFSET(SG, 0x78 + 8);
#undef VERIFY_OFFSET
}

9822 9823
module_init(hpsa_init);
module_exit(hpsa_cleanup);