hpsa.c 145.0 KB
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/*
 *    Disk Array driver for HP Smart Array SAS controllers
 *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
 *
 *    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.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
 *
 */

#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/seq_file.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 <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/kthread.h>
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#include <linux/jiffies.h>
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#include "hpsa_cmd.h"
#include "hpsa.h"

/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
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#define HPSA_DRIVER_VERSION "2.0.2-1"
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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 (in milliseconds) for board to go into simple mode */
#define MAX_CONFIG_WAIT 30000
#define MAX_IOCTL_CONFIG_WAIT 1000

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

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

static int hpsa_allow_any;
module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_allow_any,
		"Allow hpsa driver to access unknown HP Smart Array hardware");
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static int hpsa_simple_mode;
module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_simple_mode,
	"Use 'simple mode' rather than 'performant mode'");
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/* define the PCI info for the cards we can control */
static const struct pci_device_id hpsa_pci_device_id[] = {
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
	{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},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1925},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x334d},
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	{PCI_VENDOR_ID_HP,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
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		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
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	{0,}
};

MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);

/*  board_id = Subsystem Device ID & Vendor ID
 *  product = Marketing Name for the board
 *  access = Address of the struct of function pointers
 */
static struct board_type products[] = {
	{0x3241103C, "Smart Array P212", &SA5_access},
	{0x3243103C, "Smart Array P410", &SA5_access},
	{0x3245103C, "Smart Array P410i", &SA5_access},
	{0x3247103C, "Smart Array P411", &SA5_access},
	{0x3249103C, "Smart Array P812", &SA5_access},
	{0x324a103C, "Smart Array P712m", &SA5_access},
	{0x324b103C, "Smart Array P711m", &SA5_access},
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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},
	{0x1920103C, "Smart Array", &SA5_access},
	{0x1921103C, "Smart Array", &SA5_access},
	{0x1922103C, "Smart Array", &SA5_access},
	{0x1923103C, "Smart Array", &SA5_access},
	{0x1924103C, "Smart Array", &SA5_access},
	{0x1925103C, "Smart Array", &SA5_access},
	{0x1926103C, "Smart Array", &SA5_access},
	{0x1928103C, "Smart Array", &SA5_access},
	{0x334d103C, "Smart Array P822se", &SA5_access},
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	{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};

static int number_of_controllers;

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static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list);
static spinlock_t lockup_detector_lock;
static struct task_struct *hpsa_lockup_detector;

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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 *arg);
static void start_io(struct ctlr_info *h);

#ifdef CONFIG_COMPAT
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
#endif

static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
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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, u8 page_code, unsigned char *scsi3addr,
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	int cmd_type);

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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, int reason);
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static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_slave_alloc(struct scsi_device *sdev);
static void hpsa_slave_destroy(struct scsi_device *sdev);

static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
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,
	int nsgs, int *bucket_map);
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static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
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static inline u32 next_command(struct ctlr_info *h, u8 q);
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static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset);
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar);
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready);
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static inline void finish_cmd(struct CommandList *c);
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#define BOARD_NOT_READY 0
#define BOARD_READY 1
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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 int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
	if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
		return 0;

	switch (c->err_info->SenseInfo[12]) {
	case STATE_CHANGED:
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		dev_warn(&h->pdev->dev, HPSA "%d: a state change "
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			"detected, command retried\n", h->ctlr);
		break;
	case LUN_FAILED:
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		dev_warn(&h->pdev->dev, HPSA "%d: LUN failure "
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			"detected, action required\n", h->ctlr);
		break;
	case REPORT_LUNS_CHANGED:
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		dev_warn(&h->pdev->dev, HPSA "%d: report LUN data "
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			"changed, action required\n", h->ctlr);
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	/*
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	 * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
	 * target (array) devices.
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	 */
		break;
	case POWER_OR_RESET:
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		dev_warn(&h->pdev->dev, HPSA "%d: a power on "
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			"or device reset detected\n", h->ctlr);
		break;
	case UNIT_ATTENTION_CLEARED:
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		dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
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		    "cleared by another initiator\n", h->ctlr);
		break;
	default:
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		dev_warn(&h->pdev->dev, HPSA "%d: unknown "
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			"unit attention detected\n", h->ctlr);
		break;
	}
	return 1;
}

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static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
{
	if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
		(c->err_info->ScsiStatus != SAM_STAT_BUSY &&
		 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
		return 0;
	dev_warn(&h->pdev->dev, HPSA "device busy");
	return 1;
}

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static 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);
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	h = shost_to_hba(shost);
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	hpsa_scan_start(h->scsi_host);
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	return count;
}

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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]);
}

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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);

	return snprintf(buf, 20, "%d\n", h->commands_outstanding);
}

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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",
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		h->transMethod & CFGTBL_Trans_Performant ?
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			"performant" : "simple");
}

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/* List of controllers which cannot be hard reset on kexec with reset_devices */
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static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
	0x324b103C, /* SmartArray P711m */
	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 */
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	0x40800E11, /* Smart Array 5i */
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	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
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	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
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};

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/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
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	0x40800E11, /* Smart Array 5i */
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	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
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	/* 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 */
};

static int ctlr_is_hard_resettable(u32 board_id)
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{
	int i;

	for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
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		if (unresettable_controller[i] == board_id)
			return 0;
	return 1;
}

static int ctlr_is_soft_resettable(u32 board_id)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
		if (soft_unresettable_controller[i] == board_id)
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			return 0;
	return 1;
}

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static int ctlr_is_resettable(u32 board_id)
{
	return ctlr_is_hard_resettable(board_id) ||
		ctlr_is_soft_resettable(board_id);
}

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static 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);
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	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
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}

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

static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
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	"1(ADM)", "UNKNOWN"
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};
#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)

static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
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	unsigned char rlevel;
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	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? */
	if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
		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);
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	if (rlevel > RAID_UNKNOWN)
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		rlevel = RAID_UNKNOWN;
	l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
	return l;
}

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

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		lunid[0], lunid[1], lunid[2], lunid[3],
		lunid[4], lunid[5], lunid[6], lunid[7]);
}

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

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

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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);
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);
501 502
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
503 504 505 506 507 508 509 510 511 512 513 514 515

static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
	NULL,
};

static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
516
	&dev_attr_resettable,
517 518 519 520 521
	NULL,
};

static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
522 523
	.name			= HPSA,
	.proc_name		= HPSA,
524 525 526 527 528 529
	.queuecommand		= hpsa_scsi_queue_command,
	.scan_start		= hpsa_scan_start,
	.scan_finished		= hpsa_scan_finished,
	.change_queue_depth	= hpsa_change_queue_depth,
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
530
	.eh_abort_handler	= hpsa_eh_abort_handler,
531 532 533 534 535 536 537 538 539
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
540
	.max_sectors = 8192,
541 542 543 544 545 546 547 548 549
};


/* Enqueuing and dequeuing functions for cmdlists. */
static inline void addQ(struct list_head *list, struct CommandList *c)
{
	list_add_tail(&c->list, list);
}

550
static inline u32 next_command(struct ctlr_info *h, u8 q)
551 552
{
	u32 a;
553
	struct reply_pool *rq = &h->reply_queue[q];
554
	unsigned long flags;
555 556

	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
557
		return h->access.command_completed(h, q);
558

559 560 561
	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
562
		spin_lock_irqsave(&h->lock, flags);
563
		h->commands_outstanding--;
564
		spin_unlock_irqrestore(&h->lock, flags);
565 566 567 568
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
569 570 571
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
572 573 574 575 576 577 578 579 580 581
	}
	return a;
}

/* set_performant_mode: Modify the tag for cciss performant
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
{
582
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
583
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
584 585 586 587
		if (likely(h->msix_vector))
			c->Header.ReplyQueue =
				smp_processor_id() % h->nreply_queues;
	}
588 589
}

590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
static int is_firmware_flash_cmd(u8 *cdb)
{
	return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
}

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

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

619 620 621 622 623 624
static void enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c)
{
	unsigned long flags;

	set_performant_mode(h, c);
625
	dial_down_lockup_detection_during_fw_flash(h, c);
626 627 628 629
	spin_lock_irqsave(&h->lock, flags);
	addQ(&h->reqQ, c);
	h->Qdepth++;
	spin_unlock_irqrestore(&h->lock, flags);
630
	start_io(h);
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
}

static inline void removeQ(struct CommandList *c)
{
	if (WARN_ON(list_empty(&c->list)))
		return;
	list_del_init(&c->list);
}

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;
}

654 655 656 657 658 659 660
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;
661
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
662

663
	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
664 665 666

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
667
			__set_bit(h->dev[i]->target, lun_taken);
668 669
	}

670 671 672 673 674 675
	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
	}
	return !found;
}

/* Add an entry into h->dev[] array. */
static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
		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;

691
	if (n >= HPSA_MAX_DEVICES) {
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
		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
	 * unit no, zero otherise.
	 */
	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
	 * has the same 8 byte LUN address, excepting byte 4.
	 * 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;
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
		/* differ only in byte 4? */
		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)++;

	/* initially, (before registering with scsi layer) we don't
	 * know our hostno and we don't want to print anything first
	 * time anyway (the scsi layer's inquiries will show that info)
	 */
	/* if (hostno != -1) */
		dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
			scsi_device_type(device->devtype), hostno,
			device->bus, device->target, device->lun);
	return 0;
}

759 760 761 762 763 764 765 766 767 768 769 770 771 772
/* Update an entry in h->dev[] array. */
static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno,
	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;
	dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d updated.\n",
		scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
		new_entry->target, new_entry->lun);
}

773 774 775 776 777 778 779
/* Replace an entry from h->dev[] array. */
static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
	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 */
780
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
781 782
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;
783 784 785 786 787 788 789 790 791 792

	/*
	 * 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;
	}

793 794 795 796 797 798 799 800
	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
	dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
		scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
			new_entry->target, new_entry->lun);
}

801 802 803 804 805 806 807 808
/* Remove an entry from h->dev[] array. */
static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

809
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878

	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--;
	dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
		scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
		sd->lun);
}

#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;
}

879 880 881 882 883 884 885 886 887 888 889 890
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;
	return 0;
}

891 892 893
/* 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
894 895 896 897
 * 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.
898 899 900 901 902 903 904 905 906
 */
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
907
#define DEVICE_UPDATED 3
908
	for (i = 0; i < haystack_size; i++) {
909 910
		if (haystack[i] == NULL) /* previously removed. */
			continue;
911 912
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
913 914 915
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
916
				return DEVICE_SAME;
917
			} else {
918
				return DEVICE_CHANGED;
919
			}
920 921 922 923 924 925
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}

926
static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
927 928 929 930 931 932 933 934 935 936 937 938 939
	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;
	struct Scsi_Host *sh = NULL;

940 941
	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
942 943 944 945 946 947 948 949 950 951 952 953 954

	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.
955 956
	 * If minor device attributes change, just update
	 * the existing device structure.
957 958 959 960 961 962 963 964 965 966 967 968 969 970
	 */
	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++;
			hpsa_scsi_remove_entry(h, hostno, i,
				removed, &nremoved);
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
971 972
			hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
				added, &nadded, removed, &nremoved);
973 974 975 976
			/* Set it to NULL to prevent it from being freed
			 * at the bottom of hpsa_update_scsi_devices()
			 */
			sd[entry] = NULL;
977 978
		} else if (device_change == DEVICE_UPDATED) {
			hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 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 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
		}
		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;
		device_change = hpsa_scsi_find_entry(sd[i], h->dev,
					h->ndevices, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
			if (hpsa_scsi_add_entry(h, hostno, sd[i],
				added, &nadded) != 0)
				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 */
		}
	}
	spin_unlock_irqrestore(&h->devlock, flags);

	/* 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.
	 */
	if (hostno == -1 || !changes)
		goto free_and_out;

	sh = h->scsi_host;
	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
		struct scsi_device *sdev =
			scsi_device_lookup(sh, removed[i]->bus,
				removed[i]->target, removed[i]->lun);
		if (sdev != NULL) {
			scsi_remove_device(sdev);
			scsi_device_put(sdev);
		} else {
			/* We don't expect to get here.
			 * future cmds to this device will get selection
			 * timeout as if the device was gone.
			 */
			dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
				" for removal.", hostno, removed[i]->bus,
				removed[i]->target, removed[i]->lun);
		}
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
		if (scsi_add_device(sh, added[i]->bus,
			added[i]->target, added[i]->lun) == 0)
			continue;
		dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
			"device not added.\n", hostno, added[i]->bus,
			added[i]->target, added[i]->lun);
		/* 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]);
	}

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

/*
 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 * 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;
}

/* link sdev->hostdata to our per-device structure. */
static int hpsa_slave_alloc(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd;
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
		sdev_id(sdev), sdev->lun);
	if (sd != NULL)
		sdev->hostdata = sd;
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}

static void hpsa_slave_destroy(struct scsi_device *sdev)
{
1093
	/* nothing to do. */
1094 1095
}

1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
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;
}

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

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

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

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

1134
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
	chain_sg->Ext = HPSA_SG_CHAIN;
	chain_sg->Len = sizeof(*chain_sg) *
		(c->Header.SGTotal - h->max_cmd_sg_entries);
	temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
				PCI_DMA_TODEVICE);
1147 1148 1149 1150 1151 1152
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
		chain_sg->Addr.lower = 0;
		chain_sg->Addr.upper = 0;
		return -1;
	}
1153 1154
	chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
	chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1155
	return 0;
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
}

static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg;
	union u64bit temp64;

	if (c->Header.SGTotal <= h->max_cmd_sg_entries)
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	temp64.val32.lower = chain_sg->Addr.lower;
	temp64.val32.upper = chain_sg->Addr.upper;
	pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
}

1173
static void complete_scsi_command(struct CommandList *cp)
1174 1175 1176 1177 1178 1179 1180 1181
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;

	unsigned char sense_key;
	unsigned char asc;      /* additional sense code */
	unsigned char ascq;     /* additional sense code qualifier */
1182
	unsigned long sense_data_size;
1183 1184 1185 1186 1187 1188

	ei = cp->err_info;
	cmd = (struct scsi_cmnd *) cp->scsi_cmd;
	h = cp->h;

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
1189 1190
	if (cp->Header.SGTotal > h->max_cmd_sg_entries)
		hpsa_unmap_sg_chain_block(h, cp);
1191 1192 1193

	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
1194
	cmd->result |= ei->ScsiStatus;
1195 1196

	/* copy the sense data whether we need to or not. */
1197 1198 1199 1200 1201 1202 1203 1204
	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);
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
	scsi_set_resid(cmd, ei->ResidualCnt);

	if (ei->CommandStatus == 0) {
		cmd->scsi_done(cmd);
		cmd_free(h, cp);
		return;
	}

	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
		if (ei->ScsiStatus) {
			/* Get sense key */
			sense_key = 0xf & ei->SenseInfo[2];
			/* Get additional sense code */
			asc = ei->SenseInfo[12];
			/* Get addition sense code qualifier */
			ascq = ei->SenseInfo[13];
		}

		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
			if (check_for_unit_attention(h, cp)) {
				cmd->result = DID_SOFT_ERROR << 16;
				break;
			}
			if (sense_key == ILLEGAL_REQUEST) {
				/*
				 * SCSI REPORT_LUNS is commonly unsupported on
				 * Smart Array.  Suppress noisy complaint.
				 */
				if (cp->Request.CDB[0] == REPORT_LUNS)
					break;

				/* If ASC/ASCQ indicate Logical Unit
				 * Not Supported condition,
				 */
				if ((asc == 0x25) && (ascq == 0x0)) {
					dev_warn(&h->pdev->dev, "cp %p "
						"has check condition\n", cp);
					break;
				}
			}

			if (sense_key == NOT_READY) {
				/* If Sense is Not Ready, Logical Unit
				 * Not ready, Manual Intervention
				 * required
				 */
				if ((asc == 0x04) && (ascq == 0x03)) {
					dev_warn(&h->pdev->dev, "cp %p "
						"has check condition: unit "
						"not ready, manual "
						"intervention required\n", cp);
					break;
				}
			}
1262 1263 1264 1265 1266 1267 1268 1269 1270
			if (sense_key == ABORTED_COMMAND) {
				/* Aborted command is retryable */
				dev_warn(&h->pdev->dev, "cp %p "
					"has check condition: aborted command: "
					"ASC: 0x%x, ASCQ: 0x%x\n",
					cp, asc, ascq);
				cmd->result = DID_SOFT_ERROR << 16;
				break;
			}
1271
			/* Must be some other type of check condition */
1272
			dev_dbg(&h->pdev->dev, "cp %p has check condition: "
1273 1274 1275 1276
					"unknown type: "
					"Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
					"Returning result: 0x%x, "
					"cmd=[%02x %02x %02x %02x %02x "
1277
					"%02x %02x %02x %02x %02x %02x "
1278 1279 1280 1281 1282 1283 1284
					"%02x %02x %02x %02x %02x]\n",
					cp, sense_key, asc, ascq,
					cmd->result,
					cmd->cmnd[0], cmd->cmnd[1],
					cmd->cmnd[2], cmd->cmnd[3],
					cmd->cmnd[4], cmd->cmnd[5],
					cmd->cmnd[6], cmd->cmnd[7],
1285 1286 1287 1288
					cmd->cmnd[8], cmd->cmnd[9],
					cmd->cmnd[10], cmd->cmnd[11],
					cmd->cmnd[12], cmd->cmnd[13],
					cmd->cmnd[14], cmd->cmnd[15]);
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
			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:
		dev_warn(&h->pdev->dev, "cp %p has"
			" completed with data overrun "
			"reported\n", cp);
		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:
1343
		cmd->result = DID_ERROR << 16;
1344
		dev_warn(&h->pdev->dev, "cp %p has "
1345
			"protocol error\n", cp);
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
		break;
	case CMD_ABORTED:
		cmd->result = DID_ABORT << 16;
		dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
				cp, ei->ScsiStatus);
		break;
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
		break;
	case CMD_UNSOLICITED_ABORT:
1365 1366
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
		dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
1367 1368 1369 1370 1371 1372
			"abort\n", cp);
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
		dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
		break;
1373 1374 1375 1376
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}
	cmd->scsi_done(cmd);
	cmd_free(h, cp);
}

static void hpsa_pci_unmap(struct pci_dev *pdev,
	struct CommandList *c, int sg_used, int data_direction)
{
	int i;
	union u64bit addr64;

	for (i = 0; i < sg_used; i++) {
		addr64.val32.lower = c->SG[i].Addr.lower;
		addr64.val32.upper = c->SG[i].Addr.upper;
		pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
			data_direction);
	}
}

1400
static int hpsa_map_one(struct pci_dev *pdev,
1401 1402 1403 1404 1405
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
1406
	u64 addr64;
1407 1408 1409 1410

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
		cp->Header.SGTotal = 0;
1411
		return 0;
1412 1413
	}

1414
	addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1415
	if (dma_mapping_error(&pdev->dev, addr64)) {
1416
		/* Prevent subsequent unmap of something never mapped */
1417 1418
		cp->Header.SGList = 0;
		cp->Header.SGTotal = 0;
1419
		return -1;
1420
	}
1421
	cp->SG[0].Addr.lower =
1422
	  (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1423
	cp->SG[0].Addr.upper =
1424
	  (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1425
	cp->SG[0].Len = buflen;
1426 1427
	cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
	cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1428
	return 0;
1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
}

static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
	struct CommandList *c)
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
	enqueue_cmd_and_start_io(h, c);
	wait_for_completion(&wait);
}

1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456
static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h,
	struct CommandList *c)
{
	unsigned long flags;

	/* If controller lockup detected, fake a hardware error. */
	spin_lock_irqsave(&h->lock, flags);
	if (unlikely(h->lockup_detected)) {
		spin_unlock_irqrestore(&h->lock, flags);
		c->err_info->CommandStatus = CMD_HARDWARE_ERR;
	} else {
		spin_unlock_irqrestore(&h->lock, flags);
		hpsa_scsi_do_simple_cmd_core(h, c);
	}
}

1457
#define MAX_DRIVER_CMD_RETRIES 25
1458 1459 1460
static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction)
{
1461
	int backoff_time = 10, retry_count = 0;
1462 1463

	do {
1464
		memset(c->err_info, 0, sizeof(*c->err_info));
1465 1466
		hpsa_scsi_do_simple_cmd_core(h, c);
		retry_count++;
1467 1468 1469 1470 1471
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
1472
	} while ((check_for_unit_attention(h, c) ||
1473 1474
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
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 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
}

static void hpsa_scsi_interpret_error(struct CommandList *cp)
{
	struct ErrorInfo *ei;
	struct device *d = &cp->h->pdev->dev;

	ei = cp->err_info;
	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
		dev_warn(d, "cmd %p has completed with errors\n", cp);
		dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
				ei->ScsiStatus);
		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. */
			dev_info(d, "UNDERRUN\n");
		break;
	case CMD_DATA_OVERRUN:
		dev_warn(d, "cp %p has completed with data overrun\n", cp);
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
		 * to non-existent targets as invalid commands.
		 */
		dev_warn(d, "cp %p is reported invalid (probably means "
			"target device no longer present)\n", cp);
		/* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
		print_cmd(cp);  */
		}
		break;
	case CMD_PROTOCOL_ERR:
		dev_warn(d, "cp %p has protocol error \n", cp);
		break;
	case CMD_HARDWARE_ERR:
		/* cmd->result = DID_ERROR << 16; */
		dev_warn(d, "cp %p had hardware error\n", cp);
		break;
	case CMD_CONNECTION_LOST:
		dev_warn(d, "cp %p had connection lost\n", cp);
		break;
	case CMD_ABORTED:
		dev_warn(d, "cp %p was aborted\n", cp);
		break;
	case CMD_ABORT_FAILED:
		dev_warn(d, "cp %p reports abort failed\n", cp);
		break;
	case CMD_UNSOLICITED_ABORT:
		dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
		break;
	case CMD_TIMEOUT:
		dev_warn(d, "cp %p timed out\n", cp);
		break;
1533 1534 1535
	case CMD_UNABORTABLE:
		dev_warn(d, "Command unabortable\n");
		break;
1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553
	default:
		dev_warn(d, "cp %p returned unknown status %x\n", cp,
				ei->CommandStatus);
	}
}

static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
			unsigned char page, unsigned char *buf,
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_special_alloc(h);

	if (c == NULL) {			/* trouble... */
		dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1554
		return -ENOMEM;
1555 1556
	}

1557 1558 1559 1560 1561
	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
1562 1563 1564 1565 1566 1567
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(c);
		rc = -1;
	}
1568
out:
1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
	cmd_special_free(h, c);
	return rc;
}

static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_special_alloc(h);

	if (c == NULL) {			/* trouble... */
		dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1583
		return -ENOMEM;
1584 1585
	}

1586 1587 1588
	/* fill_cmd can't fail here, no data buffer to map. */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h,
			NULL, 0, 0, scsi3addr, TYPE_MSG);
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652
	hpsa_scsi_do_simple_cmd_core(h, c);
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
		hpsa_scsi_interpret_error(c);
		rc = -1;
	}
	cmd_special_free(h, c);
	return rc;
}

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;
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
	if (rc == 0)
		*raid_level = buf[8];
	if (*raid_level > RAID_UNKNOWN)
		*raid_level = RAID_UNKNOWN;
	kfree(buf);
	return;
}

/* Get the device id from inquiry page 0x83 */
static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
	unsigned char *device_id, int buflen)
{
	int rc;
	unsigned char *buf;

	if (buflen > 16)
		buflen = 16;
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return -1;
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
	if (rc == 0)
		memcpy(device_id, &buf[8], buflen);
	kfree(buf);
	return rc != 0;
}

static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
		struct ReportLUNdata *buf, int bufsize,
		int extended_response)
{
	int rc = IO_OK;
	struct CommandList *c;
	unsigned char scsi3addr[8];
	struct ErrorInfo *ei;

	c = cmd_special_alloc(h);
	if (c == NULL) {			/* trouble... */
		dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
		return -1;
	}
1653 1654
	/* address the controller */
	memset(scsi3addr, 0, sizeof(scsi3addr));
1655 1656 1657 1658 1659
	if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
		buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
1660 1661 1662 1663 1664 1665 1666 1667 1668
	if (extended_response)
		c->Request.CDB[1] = extended_response;
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
	ei = c->err_info;
	if (ei->CommandStatus != 0 &&
	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(c);
		rc = -1;
	}
1669
out:
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
	cmd_special_free(h, c);
	return rc;
}

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

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;
}

static int hpsa_update_device_info(struct ctlr_info *h,
1696 1697
	unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
	unsigned char *is_OBDR_device)
1698
{
1699 1700 1701 1702 1703 1704

#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)

1705
	unsigned char *inq_buff;
1706
	unsigned char *obdr_sig;
1707

1708
	inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
	if (!inq_buff)
		goto bail_out;

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

	this_device->devtype = (inq_buff[0] & 0x1f);
	memcpy(this_device->scsi3addr, scsi3addr, 8);
	memcpy(this_device->vendor, &inq_buff[8],
		sizeof(this_device->vendor));
	memcpy(this_device->model, &inq_buff[16],
		sizeof(this_device->model));
	memset(this_device->device_id, 0,
		sizeof(this_device->device_id));
	hpsa_get_device_id(h, scsi3addr, this_device->device_id,
		sizeof(this_device->device_id));

	if (this_device->devtype == TYPE_DISK &&
		is_logical_dev_addr_mode(scsi3addr))
		hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
	else
		this_device->raid_level = RAID_UNKNOWN;

1738 1739 1740 1741 1742 1743 1744 1745 1746 1747
	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);
	}

1748 1749 1750 1751 1752 1753 1754 1755
	kfree(inq_buff);
	return 0;

bail_out:
	kfree(inq_buff);
	return 1;
}

1756
static unsigned char *ext_target_model[] = {
1757 1758 1759 1760
	"MSA2012",
	"MSA2024",
	"MSA2312",
	"MSA2324",
1761
	"P2000 G3 SAS",
1762 1763 1764
	NULL,
};

1765
static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1766 1767 1768
{
	int i;

1769 1770 1771
	for (i = 0; ext_target_model[i]; i++)
		if (strncmp(device->model, ext_target_model[i],
			strlen(ext_target_model[i])) == 0)
1772 1773 1774 1775 1776
			return 1;
	return 0;
}

/* Helper function to assign bus, target, lun mapping of devices.
1777
 * Puts non-external target logical volumes on bus 0, external target logical
1778 1779 1780 1781 1782 1783
 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
 * 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.)
 */
static void figure_bus_target_lun(struct ctlr_info *h,
1784
	u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
1785
{
1786 1787 1788 1789
	u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));

	if (!is_logical_dev_addr_mode(lunaddrbytes)) {
		/* physical device, target and lun filled in later */
1790
		if (is_hba_lunid(lunaddrbytes))
1791
			hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
1792
		else
1793 1794 1795 1796 1797
			/* defer target, lun assignment for physical devices */
			hpsa_set_bus_target_lun(device, 2, -1, -1);
		return;
	}
	/* It's a logical device */
1798 1799
	if (is_ext_target(h, device)) {
		/* external target way, put logicals on bus 1
1800 1801 1802 1803 1804 1805
		 * and match target/lun numbers box
		 * reports, other smart array, bus 0, target 0, match lunid
		 */
		hpsa_set_bus_target_lun(device,
			1, (lunid >> 16) & 0x3fff, lunid & 0x00ff);
		return;
1806
	}
1807
	hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
1808 1809 1810 1811
}

/*
 * If there is no lun 0 on a target, linux won't find any devices.
1812
 * For the external targets (arrays), we have to manually detect the enclosure
1813 1814 1815 1816 1817 1818 1819 1820
 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
 * it for some reason.  *tmpdevice is the target we're adding,
 * this_device is a pointer into the current element of currentsd[]
 * that we're building up in update_scsi_devices(), below.
 * lunzerobits is a bitmap that tracks which targets already have a
 * lun 0 assigned.
 * Returns 1 if an enclosure was added, 0 if not.
 */
1821
static int add_ext_target_dev(struct ctlr_info *h,
1822
	struct hpsa_scsi_dev_t *tmpdevice,
1823
	struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1824
	unsigned long lunzerobits[], int *n_ext_target_devs)
1825 1826 1827
{
	unsigned char scsi3addr[8];

1828
	if (test_bit(tmpdevice->target, lunzerobits))
1829 1830 1831 1832 1833
		return 0; /* There is already a lun 0 on this target. */

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

1834 1835
	if (!is_ext_target(h, tmpdevice))
		return 0; /* Only external target devices have this problem. */
1836

1837
	if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
1838 1839
		return 0;

1840
	memset(scsi3addr, 0, 8);
1841
	scsi3addr[3] = tmpdevice->target;
1842 1843 1844
	if (is_hba_lunid(scsi3addr))
		return 0; /* Don't add the RAID controller here. */

1845 1846 1847
	if (is_scsi_rev_5(h))
		return 0; /* p1210m doesn't need to do this. */

1848
	if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
1849 1850
		dev_warn(&h->pdev->dev, "Maximum number of external "
			"target devices exceeded.  Check your hardware "
1851 1852 1853 1854
			"configuration.");
		return 0;
	}

1855
	if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1856
		return 0;
1857
	(*n_ext_target_devs)++;
1858 1859 1860
	hpsa_set_bus_target_lun(this_device,
				tmpdevice->bus, tmpdevice->target, 0);
	set_bit(tmpdevice->target, lunzerobits);
1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871
	return 1;
}

/*
 * 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,
	int reportlunsize,
1872 1873
	struct ReportLUNdata *physdev, u32 *nphysicals,
	struct ReportLUNdata *logdev, u32 *nlogicals)
1874 1875 1876 1877 1878
{
	if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		return -1;
	}
1879
	*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889
	if (*nphysicals > HPSA_MAX_PHYS_LUN) {
		dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
			"  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
			*nphysicals - HPSA_MAX_PHYS_LUN);
		*nphysicals = HPSA_MAX_PHYS_LUN;
	}
	if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
		dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
		return -1;
	}
1890
	*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908
	/* 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;
}

1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
	int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
	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)
		return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];

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

1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947
static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
{
	/* 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.
	 */
	struct ReportLUNdata *physdev_list = NULL;
	struct ReportLUNdata *logdev_list = NULL;
1948 1949 1950
	u32 nphysicals = 0;
	u32 nlogicals = 0;
	u32 ndev_allocated = 0;
1951 1952 1953
	struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
	int ncurrent = 0;
	int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1954
	int i, n_ext_target_devs, ndevs_to_allocate;
1955
	int raid_ctlr_position;
1956
	DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
1957

1958
	currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
1959 1960 1961 1962
	physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
	logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
	tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);

1963
	if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1964 1965 1966 1967 1968 1969 1970 1971 1972
		dev_err(&h->pdev->dev, "out of memory\n");
		goto out;
	}
	memset(lunzerobits, 0, sizeof(lunzerobits));

	if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
			logdev_list, &nlogicals))
		goto out;

1973 1974 1975
	/* 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.
1976
	 */
1977
	ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
1978 1979 1980

	/* Allocate the per device structures */
	for (i = 0; i < ndevs_to_allocate; i++) {
1981 1982 1983 1984 1985 1986 1987
		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;
		}

1988 1989 1990 1991 1992 1993 1994 1995 1996
		currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
		if (!currentsd[i]) {
			dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
				__FILE__, __LINE__);
			goto out;
		}
		ndev_allocated++;
	}

1997 1998 1999 2000 2001
	if (unlikely(is_scsi_rev_5(h)))
		raid_ctlr_position = 0;
	else
		raid_ctlr_position = nphysicals + nlogicals;

2002
	/* adjust our table of devices */
2003
	n_ext_target_devs = 0;
2004
	for (i = 0; i < nphysicals + nlogicals + 1; i++) {
2005
		u8 *lunaddrbytes, is_OBDR = 0;
2006 2007

		/* Figure out where the LUN ID info is coming from */
2008 2009
		lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
			i, nphysicals, nlogicals, physdev_list, logdev_list);
2010
		/* skip masked physical devices. */
2011 2012
		if (lunaddrbytes[3] & 0xC0 &&
			i < nphysicals + (raid_ctlr_position == 0))
2013 2014 2015
			continue;

		/* Get device type, vendor, model, device id */
2016 2017
		if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
							&is_OBDR))
2018
			continue; /* skip it if we can't talk to it. */
2019
		figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
2020 2021 2022
		this_device = currentsd[ncurrent];

		/*
2023
		 * For external target devices, we have to insert a LUN 0 which
2024 2025 2026 2027 2028
		 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
		 * is nonetheless an enclosure device there.  We have to
		 * present that otherwise linux won't find anything if
		 * there is no lun 0.
		 */
2029
		if (add_ext_target_dev(h, tmpdevice, this_device,
2030
				lunaddrbytes, lunzerobits,
2031
				&n_ext_target_devs)) {
2032 2033 2034 2035 2036 2037 2038
			ncurrent++;
			this_device = currentsd[ncurrent];
		}

		*this_device = *tmpdevice;

		switch (this_device->devtype) {
2039
		case TYPE_ROM:
2040 2041 2042 2043 2044 2045 2046
			/* 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.
			 */
2047 2048
			if (is_OBDR)
				ncurrent++;
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071
			break;
		case TYPE_DISK:
			if (i < nphysicals)
				break;
			ncurrent++;
			break;
		case TYPE_TAPE:
		case TYPE_MEDIUM_CHANGER:
			ncurrent++;
			break;
		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;
		}
2072
		if (ncurrent >= HPSA_MAX_DEVICES)
2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088
			break;
	}
	adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
out:
	kfree(tmpdevice);
	for (i = 0; i < ndev_allocated; i++)
		kfree(currentsd[i]);
	kfree(currentsd);
	kfree(physdev_list);
	kfree(logdev_list);
}

/* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
 * dma mapping  and fills in the scatter gather entries of the
 * hpsa command, cp.
 */
2089
static int hpsa_scatter_gather(struct ctlr_info *h,
2090 2091 2092 2093 2094
		struct CommandList *cp,
		struct scsi_cmnd *cmd)
{
	unsigned int len;
	struct scatterlist *sg;
2095
	u64 addr64;
2096 2097
	int use_sg, i, sg_index, chained;
	struct SGDescriptor *curr_sg;
2098

2099
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
2100 2101 2102 2103 2104 2105 2106 2107

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

	if (!use_sg)
		goto sglist_finished;

2108 2109 2110
	curr_sg = cp->SG;
	chained = 0;
	sg_index = 0;
2111
	scsi_for_each_sg(cmd, sg, use_sg, i) {
2112 2113 2114 2115 2116 2117
		if (i == h->max_cmd_sg_entries - 1 &&
			use_sg > h->max_cmd_sg_entries) {
			chained = 1;
			curr_sg = h->cmd_sg_list[cp->cmdindex];
			sg_index = 0;
		}
2118
		addr64 = (u64) sg_dma_address(sg);
2119
		len  = sg_dma_len(sg);
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
		curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
		curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
		curr_sg->Len = len;
		curr_sg->Ext = 0;  /* we are not chaining */
		curr_sg++;
	}

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

	if (chained) {
		cp->Header.SGList = h->max_cmd_sg_entries;
		cp->Header.SGTotal = (u16) (use_sg + 1);
2133 2134 2135 2136
		if (hpsa_map_sg_chain_block(h, cp)) {
			scsi_dma_unmap(cmd);
			return -1;
		}
2137
		return 0;
2138 2139 2140 2141
	}

sglist_finished:

2142 2143
	cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
	cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2144 2145 2146 2147
	return 0;
}


J
Jeff Garzik 已提交
2148
static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167
	void (*done)(struct scsi_cmnd *))
{
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	unsigned char scsi3addr[8];
	struct CommandList *c;
	unsigned long flags;

	/* Get the ptr to our adapter structure out of cmd->host. */
	h = sdev_to_hba(cmd->device);
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		done(cmd);
		return 0;
	}
	memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));

	spin_lock_irqsave(&h->lock, flags);
2168 2169 2170 2171 2172 2173
	if (unlikely(h->lockup_detected)) {
		spin_unlock_irqrestore(&h->lock, flags);
		cmd->result = DID_ERROR << 16;
		done(cmd);
		return 0;
	}
2174
	spin_unlock_irqrestore(&h->lock, flags);
2175
	c = cmd_alloc(h);
2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191
	if (c == NULL) {			/* trouble... */
		dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
		return SCSI_MLQUEUE_HOST_BUSY;
	}

	/* Fill in the command list header */

	cmd->scsi_done = done;    /* save this for use by completion code */

	/* save c in case we have to abort it  */
	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);
2192 2193
	c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
	c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237

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

	c->Request.Timeout = 0;
	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
	BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
	c->Request.CDBLen = cmd->cmd_len;
	memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
	c->Request.Type.Type = TYPE_CMD;
	c->Request.Type.Attribute = ATTR_SIMPLE;
	switch (cmd->sc_data_direction) {
	case DMA_TO_DEVICE:
		c->Request.Type.Direction = XFER_WRITE;
		break;
	case DMA_FROM_DEVICE:
		c->Request.Type.Direction = XFER_READ;
		break;
	case DMA_NONE:
		c->Request.Type.Direction = XFER_NONE;
		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() )
		 */

		c->Request.Type.Direction = XFER_RSVD;
		/* 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;
	}

2238
	if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2239 2240 2241 2242 2243 2244 2245 2246
		cmd_free(h, c);
		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;
}

J
Jeff Garzik 已提交
2247 2248
static DEF_SCSI_QCMD(hpsa_scsi_queue_command)

2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290
static void hpsa_scan_start(struct Scsi_Host *sh)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;

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

	hpsa_update_scsi_devices(h, h->scsi_host->host_no);

	spin_lock_irqsave(&h->scan_lock, flags);
	h->scan_finished = 1; /* mark scan as finished. */
	wake_up_all(&h->scan_wait_queue);
	spin_unlock_irqrestore(&h->scan_lock, flags);
}

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;
}

2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
static int hpsa_change_queue_depth(struct scsi_device *sdev,
	int qdepth, int reason)
{
	struct ctlr_info *h = sdev_to_hba(sdev);

	if (reason != SCSI_QDEPTH_DEFAULT)
		return -ENOTSUPP;

	if (qdepth < 1)
		qdepth = 1;
	else
		if (qdepth > h->nr_cmds)
			qdepth = h->nr_cmds;
	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
	return sdev->queue_depth;
}

2308 2309 2310 2311 2312 2313 2314 2315 2316 2317
static void hpsa_unregister_scsi(struct ctlr_info *h)
{
	/* we are being forcibly unloaded, and may not refuse. */
	scsi_remove_host(h->scsi_host);
	scsi_host_put(h->scsi_host);
	h->scsi_host = NULL;
}

static int hpsa_register_scsi(struct ctlr_info *h)
{
2318 2319
	struct Scsi_Host *sh;
	int error;
2320

2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353
	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
	if (sh == NULL)
		goto fail;

	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;
	sh->can_queue = h->nr_cmds;
	sh->cmd_per_lun = h->nr_cmds;
	sh->sg_tablesize = h->maxsgentries;
	h->scsi_host = sh;
	sh->hostdata[0] = (unsigned long) h;
	sh->irq = h->intr[h->intr_mode];
	sh->unique_id = sh->irq;
	error = scsi_add_host(sh, &h->pdev->dev);
	if (error)
		goto fail_host_put;
	scsi_scan_host(sh);
	return 0;

 fail_host_put:
	dev_err(&h->pdev->dev, "%s: scsi_add_host"
		" failed for controller %d\n", __func__, h->ctlr);
	scsi_host_put(sh);
	return error;
 fail:
	dev_err(&h->pdev->dev, "%s: scsi_host_alloc"
		" failed for controller %d\n", __func__, h->ctlr);
	return -ENOMEM;
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383
}

static int wait_for_device_to_become_ready(struct ctlr_info *h,
	unsigned char lunaddr[])
{
	int rc = 0;
	int count = 0;
	int waittime = 1; /* seconds */
	struct CommandList *c;

	c = cmd_special_alloc(h);
	if (!c) {
		dev_warn(&h->pdev->dev, "out of memory in "
			"wait_for_device_to_become_ready.\n");
		return IO_ERROR;
	}

	/* Send test unit ready until device ready, or give up. */
	while (count < HPSA_TUR_RETRY_LIMIT) {

		/* Wait for a bit.  do this first, because if we send
		 * the TUR right away, the reset will just abort it.
		 */
		msleep(1000 * waittime);
		count++;

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

2384 2385 2386
		/* 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);
2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431
		hpsa_scsi_do_simple_cmd_core(h, c);
		/* no unmap needed here because no data xfer. */

		if (c->err_info->CommandStatus == CMD_SUCCESS)
			break;

		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))
			break;

		dev_warn(&h->pdev->dev, "waiting %d secs "
			"for device to become ready.\n", waittime);
		rc = 1; /* device not ready. */
	}

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

	cmd_special_free(h, c);
	return rc;
}

/* Need at least one of these error handlers to keep ../scsi/hosts.c from
 * complaining.  Doing a host- or bus-reset can't do anything good here.
 */
static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
{
	int rc;
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;

	/* find the controller to which the command to be aborted was sent */
	h = sdev_to_hba(scsicmd->device);
	if (h == NULL) /* paranoia */
		return FAILED;
	dev = scsicmd->device->hostdata;
	if (!dev) {
		dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
			"device lookup failed.\n");
		return FAILED;
	}
2432 2433
	dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
		h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2434 2435 2436 2437 2438 2439 2440 2441 2442
	/* send a reset to the SCSI LUN which the command was sent to */
	rc = hpsa_send_reset(h, dev->scsi3addr);
	if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
		return SUCCESS;

	dev_warn(&h->pdev->dev, "resetting device failed.\n");
	return FAILED;
}

2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457
static void swizzle_abort_tag(u8 *tag)
{
	u8 original_tag[8];

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

2458
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
2459
	struct CommandList *abort, int swizzle)
2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_special_alloc(h);
	if (c == NULL) {	/* trouble... */
		dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
		return -ENOMEM;
	}

2471 2472 2473
	/* fill_cmd can't fail here, no buffer to map */
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, abort,
		0, 0, scsi3addr, TYPE_MSG);
2474 2475
	if (swizzle)
		swizzle_abort_tag(&c->Request.CDB[4]);
2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534
	hpsa_scsi_do_simple_cmd_core(h, c);
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd_core completed.\n",
		__func__, abort->Header.Tag.upper, abort->Header.Tag.lower);
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_SUCCESS:
		break;
	case CMD_UNABORTABLE: /* Very common, don't make noise. */
		rc = -1;
		break;
	default:
		dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
			__func__, abort->Header.Tag.upper,
			abort->Header.Tag.lower);
		hpsa_scsi_interpret_error(c);
		rc = -1;
		break;
	}
	cmd_special_free(h, c);
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
		abort->Header.Tag.upper, abort->Header.Tag.lower);
	return rc;
}

/*
 * hpsa_find_cmd_in_queue
 *
 * Used to determine whether a command (find) is still present
 * in queue_head.   Optionally excludes the last element of queue_head.
 *
 * This is used to avoid unnecessary aborts.  Commands in h->reqQ have
 * not yet been submitted, and so can be aborted by the driver without
 * sending an abort to the hardware.
 *
 * Returns pointer to command if found in queue, NULL otherwise.
 */
static struct CommandList *hpsa_find_cmd_in_queue(struct ctlr_info *h,
			struct scsi_cmnd *find, struct list_head *queue_head)
{
	unsigned long flags;
	struct CommandList *c = NULL;	/* ptr into cmpQ */

	if (!find)
		return 0;
	spin_lock_irqsave(&h->lock, flags);
	list_for_each_entry(c, queue_head, list) {
		if (c->scsi_cmd == NULL) /* e.g.: passthru ioctl */
			continue;
		if (c->scsi_cmd == find) {
			spin_unlock_irqrestore(&h->lock, flags);
			return c;
		}
	}
	spin_unlock_irqrestore(&h->lock, flags);
	return NULL;
}

2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587
static struct CommandList *hpsa_find_cmd_in_queue_by_tag(struct ctlr_info *h,
					u8 *tag, struct list_head *queue_head)
{
	unsigned long flags;
	struct CommandList *c;

	spin_lock_irqsave(&h->lock, flags);
	list_for_each_entry(c, queue_head, list) {
		if (memcmp(&c->Header.Tag, tag, 8) != 0)
			continue;
		spin_unlock_irqrestore(&h->lock, flags);
		return c;
	}
	spin_unlock_irqrestore(&h->lock, flags);
	return NULL;
}

/* Some Smart Arrays need the abort tag swizzled, and some don't.  It's hard to
 * tell which kind we're dealing with, so we send the abort both ways.  There
 * shouldn't be any collisions between swizzled and unswizzled tags due to the
 * way we construct our tags but we check anyway in case the assumptions which
 * make this true someday become false.
 */
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
	unsigned char *scsi3addr, struct CommandList *abort)
{
	u8 swizzled_tag[8];
	struct CommandList *c;
	int rc = 0, rc2 = 0;

	/* we do not expect to find the swizzled tag in our queue, but
	 * check anyway just to be sure the assumptions which make this
	 * the case haven't become wrong.
	 */
	memcpy(swizzled_tag, &abort->Request.CDB[4], 8);
	swizzle_abort_tag(swizzled_tag);
	c = hpsa_find_cmd_in_queue_by_tag(h, swizzled_tag, &h->cmpQ);
	if (c != NULL) {
		dev_warn(&h->pdev->dev, "Unexpectedly found byte-swapped tag in completion queue.\n");
		return hpsa_send_abort(h, scsi3addr, abort, 0);
	}
	rc = hpsa_send_abort(h, scsi3addr, abort, 0);

	/* if the command is still in our queue, we can't conclude that it was
	 * aborted (it might have just completed normally) but in any case
	 * we don't need to try to abort it another way.
	 */
	c = hpsa_find_cmd_in_queue(h, abort->scsi_cmd, &h->cmpQ);
	if (c)
		rc2 = hpsa_send_abort(h, scsi3addr, abort, 1);
	return rc && rc2;
}

2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661
/* Send an abort for the specified command.
 *	If the device and controller support it,
 *		send a task abort request.
 */
static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
{

	int i, rc;
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	struct CommandList *abort; /* pointer to command to be aborted */
	struct CommandList *found;
	struct scsi_cmnd *as;	/* ptr to scsi cmd inside aborted command. */
	char msg[256];		/* For debug messaging. */
	int ml = 0;

	/* Find the controller of the command to be aborted */
	h = sdev_to_hba(sc->device);
	if (WARN(h == NULL,
			"ABORT REQUEST FAILED, Controller lookup failed.\n"))
		return FAILED;

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

	memset(msg, 0, sizeof(msg));
	ml += sprintf(msg+ml, "ABORT REQUEST on C%d:B%d:T%d:L%d ",
		h->scsi_host->host_no, sc->device->channel,
		sc->device->id, sc->device->lun);

	/* Find the device of the command to be aborted */
	dev = sc->device->hostdata;
	if (!dev) {
		dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
				msg);
		return FAILED;
	}

	/* Get SCSI command to be aborted */
	abort = (struct CommandList *) sc->host_scribble;
	if (abort == NULL) {
		dev_err(&h->pdev->dev, "%s FAILED, Command to abort is NULL.\n",
				msg);
		return FAILED;
	}

	ml += sprintf(msg+ml, "Tag:0x%08x:%08x ",
		abort->Header.Tag.upper, abort->Header.Tag.lower);
	as  = (struct scsi_cmnd *) abort->scsi_cmd;
	if (as != NULL)
		ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
			as->cmnd[0], as->serial_number);
	dev_dbg(&h->pdev->dev, "%s\n", msg);
	dev_warn(&h->pdev->dev, "Abort request on C%d:B%d:T%d:L%d\n",
		h->scsi_host->host_no, dev->bus, dev->target, dev->lun);

	/* Search reqQ to See if command is queued but not submitted,
	 * if so, complete the command with aborted status and remove
	 * it from the reqQ.
	 */
	found = hpsa_find_cmd_in_queue(h, sc, &h->reqQ);
	if (found) {
		found->err_info->CommandStatus = CMD_ABORTED;
		finish_cmd(found);
		dev_info(&h->pdev->dev, "%s Request SUCCEEDED (driver queue).\n",
				msg);
		return SUCCESS;
	}

	/* not in reqQ, if also not in cmpQ, must have already completed */
	found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
	if (!found)  {
2662
		dev_dbg(&h->pdev->dev, "%s Request SUCCEEDED (not known to driver).\n",
2663 2664 2665 2666 2667 2668 2669 2670 2671
				msg);
		return SUCCESS;
	}

	/*
	 * Command is in flight, or possibly already completed
	 * by the firmware (but not to the scsi mid layer) but we can't
	 * distinguish which.  Send the abort down.
	 */
2672
	rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort);
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 2698 2699
	if (rc != 0) {
		dev_dbg(&h->pdev->dev, "%s Request FAILED.\n", msg);
		dev_warn(&h->pdev->dev, "FAILED abort on device C%d:B%d:T%d:L%d\n",
			h->scsi_host->host_no,
			dev->bus, dev->target, dev->lun);
		return FAILED;
	}
	dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);

	/* If the abort(s) above completed and actually aborted the
	 * command, then the command to be aborted should already be
	 * completed.  If not, wait around a bit more to see if they
	 * manage to complete normally.
	 */
#define ABORT_COMPLETE_WAIT_SECS 30
	for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
		found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
		if (!found)
			return SUCCESS;
		msleep(100);
	}
	dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
		msg, ABORT_COMPLETE_WAIT_SECS);
	return FAILED;
}


2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711
/*
 * 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.
 */
static struct CommandList *cmd_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
	int i;
	union u64bit temp64;
	dma_addr_t cmd_dma_handle, err_dma_handle;
2712
	unsigned long flags;
2713

2714
	spin_lock_irqsave(&h->lock, flags);
2715 2716
	do {
		i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2717 2718
		if (i == h->nr_cmds) {
			spin_unlock_irqrestore(&h->lock, flags);
2719
			return NULL;
2720
		}
2721 2722 2723
	} while (test_and_set_bit
		 (i & (BITS_PER_LONG - 1),
		  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2724 2725 2726
	h->nr_allocs++;
	spin_unlock_irqrestore(&h->lock, flags);

2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737
	c = h->cmd_pool + i;
	memset(c, 0, sizeof(*c));
	cmd_dma_handle = h->cmd_pool_dhandle
	    + i * sizeof(*c);
	c->err_info = h->errinfo_pool + i;
	memset(c->err_info, 0, sizeof(*c->err_info));
	err_dma_handle = h->errinfo_pool_dhandle
	    + i * sizeof(*c->err_info);

	c->cmdindex = i;

2738
	INIT_LIST_HEAD(&c->list);
2739 2740
	c->busaddr = (u32) cmd_dma_handle;
	temp64.val = (u64) err_dma_handle;
2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775
	c->ErrDesc.Addr.lower = temp64.val32.lower;
	c->ErrDesc.Addr.upper = temp64.val32.upper;
	c->ErrDesc.Len = sizeof(*c->err_info);

	c->h = h;
	return c;
}

/* For operations that can wait for kmalloc to possibly sleep,
 * this routine can be called. Lock need not be held to call
 * cmd_special_alloc. cmd_special_free() is the complement.
 */
static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
	union u64bit temp64;
	dma_addr_t cmd_dma_handle, err_dma_handle;

	c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
	if (c == NULL)
		return NULL;
	memset(c, 0, sizeof(*c));

	c->cmdindex = -1;

	c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
		    &err_dma_handle);

	if (c->err_info == NULL) {
		pci_free_consistent(h->pdev,
			sizeof(*c), c, cmd_dma_handle);
		return NULL;
	}
	memset(c->err_info, 0, sizeof(*c->err_info));

2776
	INIT_LIST_HEAD(&c->list);
2777 2778
	c->busaddr = (u32) cmd_dma_handle;
	temp64.val = (u64) err_dma_handle;
2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789
	c->ErrDesc.Addr.lower = temp64.val32.lower;
	c->ErrDesc.Addr.upper = temp64.val32.upper;
	c->ErrDesc.Len = sizeof(*c->err_info);

	c->h = h;
	return c;
}

static void cmd_free(struct ctlr_info *h, struct CommandList *c)
{
	int i;
2790
	unsigned long flags;
2791 2792

	i = c - h->cmd_pool;
2793
	spin_lock_irqsave(&h->lock, flags);
2794 2795 2796
	clear_bit(i & (BITS_PER_LONG - 1),
		  h->cmd_pool_bits + (i / BITS_PER_LONG));
	h->nr_frees++;
2797
	spin_unlock_irqrestore(&h->lock, flags);
2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808
}

static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
{
	union u64bit temp64;

	temp64.val32.lower = c->ErrDesc.Addr.lower;
	temp64.val32.upper = c->ErrDesc.Addr.upper;
	pci_free_consistent(h->pdev, sizeof(*c->err_info),
			    c->err_info, (dma_addr_t) temp64.val);
	pci_free_consistent(h->pdev, sizeof(*c),
2809
			    c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822
}

#ifdef CONFIG_COMPAT

static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
{
	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;

2823
	memset(&arg64, 0, sizeof(arg64));
2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838
	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;

2839
	err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859
	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,
	int cmd, void *arg)
{
	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;

2860
	memset(&arg64, 0, sizeof(arg64));
2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876
	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;

2877
	err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2878 2879 2880 2881 2882 2883 2884 2885
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915

static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
{
	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;
	}
}
2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961
#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;
	union u64bit temp64;
2962
	int rc = 0;
2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977

	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)
			return -EFAULT;
2978 2979 2980 2981
		if (iocommand.Request.Type.Direction == XFER_WRITE) {
			/* Copy the data into the buffer we created */
			if (copy_from_user(buff, iocommand.buf,
				iocommand.buf_size)) {
2982 2983
				rc = -EFAULT;
				goto out_kfree;
2984 2985 2986
			}
		} else {
			memset(buff, 0, iocommand.buf_size);
2987
		}
2988
	}
2989 2990
	c = cmd_special_alloc(h);
	if (c == NULL) {
2991 2992
		rc = -ENOMEM;
		goto out_kfree;
2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016
	}
	/* Fill in the command type */
	c->cmd_type = CMD_IOCTL_PEND;
	/* Fill in Command Header */
	c->Header.ReplyQueue = 0; /* unused in simple mode */
	if (iocommand.buf_size > 0) {	/* buffer to fill */
		c->Header.SGList = 1;
		c->Header.SGTotal = 1;
	} else	{ /* no buffers to fill */
		c->Header.SGList = 0;
		c->Header.SGTotal = 0;
	}
	memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
	/* use the kernel address the cmd block for tag */
	c->Header.Tag.lower = c->busaddr;

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

	/* Fill in the scatter gather information */
	if (iocommand.buf_size > 0) {
		temp64.val = pci_map_single(h->pdev, buff,
			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
3017 3018 3019 3020 3021 3022 3023
		if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
			c->SG[0].Addr.lower = 0;
			c->SG[0].Addr.upper = 0;
			c->SG[0].Len = 0;
			rc = -ENOMEM;
			goto out;
		}
3024 3025 3026 3027 3028
		c->SG[0].Addr.lower = temp64.val32.lower;
		c->SG[0].Addr.upper = temp64.val32.upper;
		c->SG[0].Len = iocommand.buf_size;
		c->SG[0].Ext = 0; /* we are not chaining*/
	}
3029
	hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3030 3031
	if (iocommand.buf_size > 0)
		hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
3032 3033 3034 3035 3036 3037
	check_ioctl_unit_attention(h, c);

	/* Copy the error information out */
	memcpy(&iocommand.error_info, c->err_info,
		sizeof(iocommand.error_info));
	if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
3038 3039
		rc = -EFAULT;
		goto out;
3040
	}
3041 3042
	if (iocommand.Request.Type.Direction == XFER_READ &&
		iocommand.buf_size > 0) {
3043 3044
		/* Copy the data out of the buffer we created */
		if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
3045 3046
			rc = -EFAULT;
			goto out;
3047 3048
		}
	}
3049
out:
3050
	cmd_special_free(h, c);
3051 3052 3053
out_kfree:
	kfree(buff);
	return rc;
3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065
}

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;
	union u64bit temp64;
	BYTE sg_used = 0;
	int status = 0;
	int i;
3066 3067
	u32 left;
	u32 sz;
3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093
	BYTE __user *data_ptr;

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	ioc = (BIG_IOCTL_Command_struct *)
	    kmalloc(sizeof(*ioc), GFP_KERNEL);
	if (!ioc) {
		status = -ENOMEM;
		goto cleanup1;
	}
	if (copy_from_user(ioc, argp, sizeof(*ioc))) {
		status = -EFAULT;
		goto cleanup1;
	}
	if ((ioc->buf_size < 1) &&
	    (ioc->Request.Type.Direction != XFER_NONE)) {
		status = -EINVAL;
		goto cleanup1;
	}
	/* Check kmalloc limits  using all SGs */
	if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
		status = -EINVAL;
		goto cleanup1;
	}
3094
	if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
3095 3096 3097
		status = -EINVAL;
		goto cleanup1;
	}
3098
	buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
3099 3100 3101 3102
	if (!buff) {
		status = -ENOMEM;
		goto cleanup1;
	}
3103
	buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
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
	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;
		}
		if (ioc->Request.Type.Direction == XFER_WRITE) {
			if (copy_from_user(buff[sg_used], data_ptr, sz)) {
				status = -ENOMEM;
				goto cleanup1;
			}
		} else
			memset(buff[sg_used], 0, sz);
		left -= sz;
		data_ptr += sz;
		sg_used++;
	}
	c = cmd_special_alloc(h);
	if (c == NULL) {
		status = -ENOMEM;
		goto cleanup1;
	}
	c->cmd_type = CMD_IOCTL_PEND;
	c->Header.ReplyQueue = 0;
3136
	c->Header.SGList = c->Header.SGTotal = sg_used;
3137 3138 3139 3140 3141 3142 3143 3144
	memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
	c->Header.Tag.lower = c->busaddr;
	memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
	if (ioc->buf_size > 0) {
		int i;
		for (i = 0; i < sg_used; i++) {
			temp64.val = pci_map_single(h->pdev, buff[i],
				    buff_size[i], PCI_DMA_BIDIRECTIONAL);
3145 3146 3147 3148 3149 3150 3151 3152 3153
			if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
				c->SG[i].Addr.lower = 0;
				c->SG[i].Addr.upper = 0;
				c->SG[i].Len = 0;
				hpsa_pci_unmap(h->pdev, c, i,
					PCI_DMA_BIDIRECTIONAL);
				status = -ENOMEM;
				goto cleanup1;
			}
3154 3155 3156 3157 3158 3159 3160
			c->SG[i].Addr.lower = temp64.val32.lower;
			c->SG[i].Addr.upper = temp64.val32.upper;
			c->SG[i].Len = buff_size[i];
			/* we are not chaining */
			c->SG[i].Ext = 0;
		}
	}
3161
	hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3162 3163
	if (sg_used)
		hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
3164 3165 3166 3167 3168 3169 3170 3171
	check_ioctl_unit_attention(h, c);
	/* Copy the error information out */
	memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
	if (copy_to_user(argp, ioc, sizeof(*ioc))) {
		cmd_special_free(h, c);
		status = -EFAULT;
		goto cleanup1;
	}
3172
	if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217
		/* 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])) {
				cmd_special_free(h, c);
				status = -EFAULT;
				goto cleanup1;
			}
			ptr += buff_size[i];
		}
	}
	cmd_special_free(h, c);
	status = 0;
cleanup1:
	if (buff) {
		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);
}
/*
 * ioctl
 */
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
{
	struct ctlr_info *h;
	void __user *argp = (void __user *)arg;

	h = sdev_to_hba(dev);

	switch (cmd) {
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
3218
		hpsa_scan_start(h->scsi_host);
3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232
		return 0;
	case CCISS_GETPCIINFO:
		return hpsa_getpciinfo_ioctl(h, argp);
	case CCISS_GETDRIVVER:
		return hpsa_getdrivver_ioctl(h, argp);
	case CCISS_PASSTHRU:
		return hpsa_passthru_ioctl(h, argp);
	case CCISS_BIG_PASSTHRU:
		return hpsa_big_passthru_ioctl(h, argp);
	default:
		return -ENOTTY;
	}
}

3233 3234
static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
				u8 reset_type)
3235 3236 3237 3238 3239 3240
{
	struct CommandList *c;

	c = cmd_alloc(h);
	if (!c)
		return -ENOMEM;
3241 3242
	/* fill_cmd can't fail here, no data buffer to map */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253
		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.
	 */
	return 0;
}

3254
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
3255
	void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
3256 3257 3258
	int cmd_type)
{
	int pci_dir = XFER_NONE;
3259
	struct CommandList *a; /* for commands to be aborted */
3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 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 3309 3310

	c->cmd_type = CMD_IOCTL_PEND;
	c->Header.ReplyQueue = 0;
	if (buff != NULL && size > 0) {
		c->Header.SGList = 1;
		c->Header.SGTotal = 1;
	} else {
		c->Header.SGList = 0;
		c->Header.SGTotal = 0;
	}
	c->Header.Tag.lower = c->busaddr;
	memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);

	c->Request.Type.Type = cmd_type;
	if (cmd_type == TYPE_CMD) {
		switch (cmd) {
		case HPSA_INQUIRY:
			/* are we trying to read a vital product page */
			if (page_code != 0) {
				c->Request.CDB[1] = 0x01;
				c->Request.CDB[2] = page_code;
			}
			c->Request.CDBLen = 6;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_INQUIRY;
			c->Request.CDB[4] = size & 0xFF;
			break;
		case HPSA_REPORT_LOG:
		case HPSA_REPORT_PHYS:
			/* Talking to controller so It's a physical command
			   mode = 00 target = 0.  Nothing to write.
			 */
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_READ;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
		case HPSA_CACHE_FLUSH:
			c->Request.CDBLen = 12;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
3311 3312
			c->Request.CDB[7] = (size >> 8) & 0xFF;
			c->Request.CDB[8] = size & 0xFF;
3313 3314 3315 3316 3317 3318 3319 3320 3321 3322
			break;
		case TEST_UNIT_READY:
			c->Request.CDBLen = 6;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_NONE;
			c->Request.Timeout = 0;
			break;
		default:
			dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
			BUG();
3323
			return -1;
3324 3325 3326 3327 3328 3329 3330 3331 3332 3333
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {

		case  HPSA_DEVICE_RESET_MSG:
			c->Request.CDBLen = 16;
			c->Request.Type.Type =  1; /* It is a MSG not a CMD */
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_NONE;
			c->Request.Timeout = 0; /* Don't time out */
3334 3335
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] =  cmd;
3336
			c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
3337 3338 3339 3340 3341 3342
			/* 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;
3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370
			break;
		case  HPSA_ABORT_MSG:
			a = buff;       /* point to command to be aborted */
			dev_dbg(&h->pdev->dev, "Abort Tag:0x%08x:%08x using request Tag:0x%08x:%08x\n",
				a->Header.Tag.upper, a->Header.Tag.lower,
				c->Header.Tag.upper, c->Header.Tag.lower);
			c->Request.CDBLen = 16;
			c->Request.Type.Type = TYPE_MSG;
			c->Request.Type.Attribute = ATTR_SIMPLE;
			c->Request.Type.Direction = XFER_WRITE;
			c->Request.Timeout = 0; /* Don't time out */
			c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
			c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
			c->Request.CDB[2] = 0x00; /* reserved */
			c->Request.CDB[3] = 0x00; /* reserved */
			/* Tag to abort goes in CDB[4]-CDB[11] */
			c->Request.CDB[4] = a->Header.Tag.lower & 0xFF;
			c->Request.CDB[5] = (a->Header.Tag.lower >> 8) & 0xFF;
			c->Request.CDB[6] = (a->Header.Tag.lower >> 16) & 0xFF;
			c->Request.CDB[7] = (a->Header.Tag.lower >> 24) & 0xFF;
			c->Request.CDB[8] = a->Header.Tag.upper & 0xFF;
			c->Request.CDB[9] = (a->Header.Tag.upper >> 8) & 0xFF;
			c->Request.CDB[10] = (a->Header.Tag.upper >> 16) & 0xFF;
			c->Request.CDB[11] = (a->Header.Tag.upper >> 24) & 0xFF;
			c->Request.CDB[12] = 0x00; /* reserved */
			c->Request.CDB[13] = 0x00; /* reserved */
			c->Request.CDB[14] = 0x00; /* reserved */
			c->Request.CDB[15] = 0x00; /* reserved */
3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394
		break;
		default:
			dev_warn(&h->pdev->dev, "unknown message type %d\n",
				cmd);
			BUG();
		}
	} else {
		dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
		BUG();
	}

	switch (c->Request.Type.Direction) {
	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;
	}
3395 3396 3397
	if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
		return -1;
	return 0;
3398 3399 3400 3401 3402 3403 3404 3405 3406
}

/*
 * 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;
3407 3408
	void __iomem *page_remapped = ioremap_nocache(page_base,
		page_offs + size);
3409 3410 3411 3412 3413 3414 3415 3416 3417 3418

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

/* Takes cmds off the submission queue and sends them to the hardware,
 * then puts them on the queue of cmds waiting for completion.
 */
static void start_io(struct ctlr_info *h)
{
	struct CommandList *c;
3419
	unsigned long flags;
3420

3421
	spin_lock_irqsave(&h->lock, flags);
3422 3423
	while (!list_empty(&h->reqQ)) {
		c = list_entry(h->reqQ.next, struct CommandList, list);
3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435
		/* can't do anything if fifo is full */
		if ((h->access.fifo_full(h))) {
			dev_warn(&h->pdev->dev, "fifo full\n");
			break;
		}

		/* Get the first entry from the Request Q */
		removeQ(c);
		h->Qdepth--;

		/* Put job onto the completed Q */
		addQ(&h->cmpQ, c);
3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448

		/* Must increment commands_outstanding before unlocking
		 * and submitting to avoid race checking for fifo full
		 * condition.
		 */
		h->commands_outstanding++;
		if (h->commands_outstanding > h->max_outstanding)
			h->max_outstanding = h->commands_outstanding;

		/* Tell the controller execute command */
		spin_unlock_irqrestore(&h->lock, flags);
		h->access.submit_command(h, c);
		spin_lock_irqsave(&h->lock, flags);
3449
	}
3450
	spin_unlock_irqrestore(&h->lock, flags);
3451 3452
}

3453
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
3454
{
3455
	return h->access.command_completed(h, q);
3456 3457
}

3458
static inline bool interrupt_pending(struct ctlr_info *h)
3459 3460 3461 3462 3463 3464
{
	return h->access.intr_pending(h);
}

static inline long interrupt_not_for_us(struct ctlr_info *h)
{
3465 3466
	return (h->access.intr_pending(h) == 0) ||
		(h->interrupts_enabled == 0);
3467 3468
}

3469 3470
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
	u32 raw_tag)
3471 3472 3473 3474 3475 3476 3477 3478
{
	if (unlikely(tag_index >= h->nr_cmds)) {
		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
		return 1;
	}
	return 0;
}

3479
static inline void finish_cmd(struct CommandList *c)
3480
{
3481 3482 3483
	unsigned long flags;

	spin_lock_irqsave(&c->h->lock, flags);
3484
	removeQ(c);
3485
	spin_unlock_irqrestore(&c->h->lock, flags);
3486
	dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
3487
	if (likely(c->cmd_type == CMD_SCSI))
3488
		complete_scsi_command(c);
3489 3490 3491 3492
	else if (c->cmd_type == CMD_IOCTL_PEND)
		complete(c->waiting);
}

3493 3494 3495 3496 3497 3498 3499 3500 3501 3502
static inline u32 hpsa_tag_contains_index(u32 tag)
{
	return tag & DIRECT_LOOKUP_BIT;
}

static inline u32 hpsa_tag_to_index(u32 tag)
{
	return tag >> DIRECT_LOOKUP_SHIFT;
}

3503 3504

static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3505
{
3506 3507
#define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
#define HPSA_SIMPLE_ERROR_BITS 0x03
3508
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3509 3510
		return tag & ~HPSA_SIMPLE_ERROR_BITS;
	return tag & ~HPSA_PERF_ERROR_BITS;
3511 3512
}

3513
/* process completion of an indexed ("direct lookup") command */
3514
static inline void process_indexed_cmd(struct ctlr_info *h,
3515 3516 3517 3518 3519 3520
	u32 raw_tag)
{
	u32 tag_index;
	struct CommandList *c;

	tag_index = hpsa_tag_to_index(raw_tag);
3521 3522 3523 3524
	if (!bad_tag(h, tag_index, raw_tag)) {
		c = h->cmd_pool + tag_index;
		finish_cmd(c);
	}
3525 3526 3527
}

/* process completion of a non-indexed command */
3528
static inline void process_nonindexed_cmd(struct ctlr_info *h,
3529 3530 3531 3532
	u32 raw_tag)
{
	u32 tag;
	struct CommandList *c = NULL;
3533
	unsigned long flags;
3534

3535
	tag = hpsa_tag_discard_error_bits(h, raw_tag);
3536
	spin_lock_irqsave(&h->lock, flags);
3537
	list_for_each_entry(c, &h->cmpQ, list) {
3538
		if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3539
			spin_unlock_irqrestore(&h->lock, flags);
3540
			finish_cmd(c);
3541
			return;
3542 3543
		}
	}
3544
	spin_unlock_irqrestore(&h->lock, flags);
3545 3546 3547
	bad_tag(h, h->nr_cmds + 1, raw_tag);
}

3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566
/* 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;
}

3567 3568 3569 3570 3571 3572
/*
 * 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)
3573
{
3574 3575 3576 3577 3578 3579 3580
	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;
3581 3582 3583 3584 3585 3586 3587
	u32 raw_tag;

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
3588
	h->last_intr_timestamp = get_jiffies_64();
3589
	while (interrupt_pending(h)) {
3590
		raw_tag = get_next_completion(h, q);
3591
		while (raw_tag != FIFO_EMPTY)
3592
			raw_tag = next_command(h, q);
3593 3594 3595 3596
	}
	return IRQ_HANDLED;
}

3597
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
3598
{
3599
	struct ctlr_info *h = queue_to_hba(queue);
3600
	u32 raw_tag;
3601
	u8 q = *(u8 *) queue;
3602 3603 3604 3605

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

3606
	h->last_intr_timestamp = get_jiffies_64();
3607
	raw_tag = get_next_completion(h, q);
3608
	while (raw_tag != FIFO_EMPTY)
3609
		raw_tag = next_command(h, q);
3610 3611 3612
	return IRQ_HANDLED;
}

3613
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
3614
{
3615
	struct ctlr_info *h = queue_to_hba((u8 *) queue);
3616
	u32 raw_tag;
3617
	u8 q = *(u8 *) queue;
3618 3619 3620

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
3621
	h->last_intr_timestamp = get_jiffies_64();
3622
	while (interrupt_pending(h)) {
3623
		raw_tag = get_next_completion(h, q);
3624
		while (raw_tag != FIFO_EMPTY) {
3625 3626
			if (likely(hpsa_tag_contains_index(raw_tag)))
				process_indexed_cmd(h, raw_tag);
3627
			else
3628
				process_nonindexed_cmd(h, raw_tag);
3629
			raw_tag = next_command(h, q);
3630 3631 3632 3633 3634
		}
	}
	return IRQ_HANDLED;
}

3635
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
3636
{
3637
	struct ctlr_info *h = queue_to_hba(queue);
3638
	u32 raw_tag;
3639
	u8 q = *(u8 *) queue;
3640

3641
	h->last_intr_timestamp = get_jiffies_64();
3642
	raw_tag = get_next_completion(h, q);
3643
	while (raw_tag != FIFO_EMPTY) {
3644 3645
		if (likely(hpsa_tag_contains_index(raw_tag)))
			process_indexed_cmd(h, raw_tag);
3646
		else
3647
			process_nonindexed_cmd(h, raw_tag);
3648
		raw_tag = next_command(h, q);
3649 3650 3651 3652
	}
	return IRQ_HANDLED;
}

3653 3654 3655 3656
/* 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.
 */
3657 3658
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
			unsigned char type)
3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721
{
	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;
	uint32_t paddr32, tag;
	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);
		return -ENOMEM;
	}

	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).
	 */
	paddr32 = paddr64;

	cmd->CommandHeader.ReplyQueue = 0;
	cmd->CommandHeader.SGList = 0;
	cmd->CommandHeader.SGTotal = 0;
	cmd->CommandHeader.Tag.lower = paddr32;
	cmd->CommandHeader.Tag.upper = 0;
	memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);

	cmd->Request.CDBLen = 16;
	cmd->Request.Type.Type = TYPE_MSG;
	cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
	cmd->Request.Type.Direction = XFER_NONE;
	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 */
	cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
	cmd->ErrorDescriptor.Addr.upper = 0;
	cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);

	writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);

	for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
		tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3722
		if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752
			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)

3753
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3754
	void * __iomem vaddr, u32 use_doorbell)
3755 3756 3757 3758 3759 3760 3761 3762 3763 3764
{
	u16 pmcsr;
	int pos;

	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");
3765
		writel(use_doorbell, vaddr + SA5_DOORBELL);
3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795
	} 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." */

		pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
		if (pos == 0) {
			dev_err(&pdev->dev,
				"hpsa_reset_controller: "
				"PCI PM not supported\n");
			return -ENODEV;
		}
		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
		/* enter the D3hot power management state */
		pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
		pmcsr |= PCI_D3hot;
		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);

		msleep(500);

		/* enter the D0 power management state */
		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
		pmcsr |= PCI_D0;
		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3796 3797 3798 3799 3800 3801 3802

		/*
		 * 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);
3803 3804 3805 3806
	}
	return 0;
}

3807
static void init_driver_version(char *driver_version, int len)
3808 3809
{
	memset(driver_version, 0, len);
3810
	strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
3811 3812
}

3813
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828
{
	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;
}

3829 3830
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
					  unsigned char *driver_ver)
3831 3832 3833 3834 3835 3836 3837
{
	int i;

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

3838
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857
{

	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;
}
3858
/* This does a hard reset of the controller using PCI power management
3859
 * states or the using the doorbell register.
3860
 */
3861
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3862
{
3863 3864 3865 3866 3867
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
	void __iomem *vaddr;
	unsigned long paddr;
3868
	u32 misc_fw_support;
3869
	int rc;
3870
	struct CfgTable __iomem *cfgtable;
3871
	u32 use_doorbell;
3872
	u32 board_id;
3873
	u16 command_register;
3874

3875 3876
	/* For controllers as old as the P600, this is very nearly
	 * the same thing as
3877 3878 3879 3880 3881 3882
	 *
	 * 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);
	 *
3883 3884 3885
	 * 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.
3886
	 */
3887

3888
	rc = hpsa_lookup_board_id(pdev, &board_id);
3889
	if (rc < 0 || !ctlr_is_resettable(board_id)) {
3890 3891 3892
		dev_warn(&pdev->dev, "Not resetting device.\n");
		return -ENODEV;
	}
3893 3894 3895 3896

	/* if controller is soft- but not hard resettable... */
	if (!ctlr_is_hard_resettable(board_id))
		return -ENOTSUPP; /* try soft reset later. */
3897

3898 3899 3900 3901 3902 3903 3904
	/* Save the PCI command register */
	pci_read_config_word(pdev, 4, &command_register);
	/* Turn the board off.  This is so that later pci_restore_state()
	 * won't turn the board on before the rest of config space is ready.
	 */
	pci_disable_device(pdev);
	pci_save_state(pdev);
3905

3906 3907 3908 3909 3910 3911 3912
	/* 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;
3913

3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924
	/* 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;
	}
3925 3926 3927
	rc = write_driver_ver_to_cfgtable(cfgtable);
	if (rc)
		goto unmap_vaddr;
3928

3929 3930 3931
	/* If reset via doorbell register is supported, use that.
	 * There are two such methods.  Favor the newest method.
	 */
3932
	misc_fw_support = readl(&cfgtable->misc_fw_support);
3933 3934 3935 3936 3937 3938
	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) {
3939 3940
			dev_warn(&pdev->dev, "Soft reset not supported. "
				"Firmware update is required.\n");
3941
			rc = -ENOTSUPP; /* try soft reset */
3942 3943 3944
			goto unmap_cfgtable;
		}
	}
3945

3946 3947 3948
	rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
	if (rc)
		goto unmap_cfgtable;
3949

3950 3951 3952 3953 3954
	pci_restore_state(pdev);
	rc = pci_enable_device(pdev);
	if (rc) {
		dev_warn(&pdev->dev, "failed to enable device.\n");
		goto unmap_cfgtable;
3955
	}
3956
	pci_write_config_word(pdev, 4, command_register);
3957

3958 3959 3960 3961
	/* Some devices (notably the HP Smart Array 5i Controller)
	   need a little pause here */
	msleep(HPSA_POST_RESET_PAUSE_MSECS);

3962
	/* Wait for board to become not ready, then ready. */
3963
	dev_info(&pdev->dev, "Waiting for board to reset.\n");
3964
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3965
	if (rc) {
3966
		dev_warn(&pdev->dev,
3967 3968 3969 3970 3971
			"failed waiting for board to reset."
			" Will try soft reset.\n");
		rc = -ENOTSUPP; /* Not expected, but try soft reset later */
		goto unmap_cfgtable;
	}
3972 3973 3974
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
	if (rc) {
		dev_warn(&pdev->dev,
3975 3976
			"failed waiting for board to become ready "
			"after hard reset\n");
3977 3978 3979
		goto unmap_cfgtable;
	}

3980 3981 3982 3983
	rc = controller_reset_failed(vaddr);
	if (rc < 0)
		goto unmap_cfgtable;
	if (rc) {
3984 3985 3986
		dev_warn(&pdev->dev, "Unable to successfully reset "
			"controller. Will try soft reset.\n");
		rc = -ENOTSUPP;
3987
	} else {
3988
		dev_info(&pdev->dev, "board ready after hard reset.\n");
3989 3990 3991 3992 3993 3994 3995 3996
	}

unmap_cfgtable:
	iounmap(cfgtable);

unmap_vaddr:
	iounmap(vaddr);
	return rc;
3997 3998 3999 4000 4001 4002 4003 4004 4005
}

/*
 *  We cannot read the structure directly, for portability we must use
 *   the io functions.
 *   This is for debug only.
 */
static void print_cfg_table(struct device *dev, struct CfgTable *tb)
{
4006
#ifdef HPSA_DEBUG
4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036
	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)));
	dev_info(dev, "   Max outstanding commands = 0x%d\n",
	       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 */
4037
}
4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077

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;
}

/* If MSI/MSI-X is supported by the kernel we will try to enable it on
 * controllers that are capable. If not, we use IO-APIC mode.
 */

4078
static void hpsa_interrupt_mode(struct ctlr_info *h)
4079 4080
{
#ifdef CONFIG_PCI_MSI
4081 4082 4083 4084 4085 4086 4087
	int err, i;
	struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];

	for (i = 0; i < MAX_REPLY_QUEUES; i++) {
		hpsa_msix_entries[i].vector = 0;
		hpsa_msix_entries[i].entry = i;
	}
4088 4089

	/* Some boards advertise MSI but don't really support it */
4090 4091
	if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
	    (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
4092
		goto default_int_mode;
4093 4094
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
		dev_info(&h->pdev->dev, "MSIX\n");
4095 4096
		err = pci_enable_msix(h->pdev, hpsa_msix_entries,
						MAX_REPLY_QUEUES);
4097
		if (!err) {
4098 4099
			for (i = 0; i < MAX_REPLY_QUEUES; i++)
				h->intr[i] = hpsa_msix_entries[i].vector;
4100 4101 4102 4103
			h->msix_vector = 1;
			return;
		}
		if (err > 0) {
4104
			dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
4105 4106 4107
			       "available\n", err);
			goto default_int_mode;
		} else {
4108
			dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
4109 4110 4111 4112
			       err);
			goto default_int_mode;
		}
	}
4113 4114 4115
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
		dev_info(&h->pdev->dev, "MSI\n");
		if (!pci_enable_msi(h->pdev))
4116 4117
			h->msi_vector = 1;
		else
4118
			dev_warn(&h->pdev->dev, "MSI init failed\n");
4119 4120 4121 4122
	}
default_int_mode:
#endif				/* CONFIG_PCI_MSI */
	/* if we get here we're going to use the default interrupt mode */
4123
	h->intr[h->intr_mode] = h->pdev->irq;
4124 4125
}

4126
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139
{
	int i;
	u32 subsystem_vendor_id, subsystem_device_id;

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

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

4140 4141 4142
	if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
		subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
		!hpsa_allow_any) {
4143 4144 4145 4146 4147 4148 4149
		dev_warn(&pdev->dev, "unrecognized board ID: "
			"0x%08x, ignoring.\n", *board_id);
			return -ENODEV;
	}
	return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}

4150 4151
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar)
4152 4153 4154 4155
{
	int i;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4156
		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4157
			/* addressing mode bits already removed */
4158 4159
			*memory_bar = pci_resource_start(pdev, i);
			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4160 4161 4162
				*memory_bar);
			return 0;
		}
4163
	dev_warn(&pdev->dev, "no memory BAR found\n");
4164 4165 4166
	return -ENODEV;
}

4167 4168
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready)
4169
{
4170
	int i, iterations;
4171
	u32 scratchpad;
4172 4173 4174 4175
	if (wait_for_ready)
		iterations = HPSA_BOARD_READY_ITERATIONS;
	else
		iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
4176

4177 4178 4179 4180 4181 4182 4183 4184 4185
	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;
		}
4186 4187
		msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
	}
4188
	dev_warn(&pdev->dev, "board not ready, timed out.\n");
4189 4190 4191
	return -ENODEV;
}

4192 4193 4194
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)
4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206
{
	*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;
}

4207
static int hpsa_find_cfgtables(struct ctlr_info *h)
4208
{
4209 4210 4211
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
4212
	u32 trans_offset;
4213
	int rc;
4214

4215 4216 4217 4218
	rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
		&cfg_base_addr_index, &cfg_offset);
	if (rc)
		return rc;
4219
	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
4220
		       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
4221 4222
	if (!h->cfgtable)
		return -ENOMEM;
4223 4224 4225
	rc = write_driver_ver_to_cfgtable(h->cfgtable);
	if (rc)
		return rc;
4226
	/* Find performant mode table. */
4227
	trans_offset = readl(&h->cfgtable->TransMethodOffset);
4228 4229 4230 4231 4232 4233 4234 4235
	h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
				cfg_base_addr_index)+cfg_offset+trans_offset,
				sizeof(*h->transtable));
	if (!h->transtable)
		return -ENOMEM;
	return 0;
}

4236
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
4237 4238
{
	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4239 4240 4241 4242 4243

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

4244 4245 4246 4247 4248 4249 4250 4251 4252
	if (h->max_commands < 16) {
		dev_warn(&h->pdev->dev, "Controller reports "
			"max supported commands of %d, an obvious lie. "
			"Using 16.  Ensure that firmware is up to date.\n",
			h->max_commands);
		h->max_commands = 16;
	}
}

4253 4254 4255 4256
/* Interrogate the hardware for some limits:
 * max commands, max SG elements without chaining, and with chaining,
 * SG chain block size, etc.
 */
4257
static void hpsa_find_board_params(struct ctlr_info *h)
4258
{
4259
	hpsa_get_max_perf_mode_cmds(h);
4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274
	h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
	/*
	 * Limit in-command s/g elements to 32 save dma'able memory.
	 * Howvever spec says if 0, use 31
	 */
	h->max_cmd_sg_entries = 31;
	if (h->maxsgentries > 512) {
		h->max_cmd_sg_entries = 32;
		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
		h->maxsgentries--; /* save one for chain pointer */
	} else {
		h->maxsgentries = 31; /* default to traditional values */
		h->chainsize = 0;
	}
4275 4276 4277

	/* Find out what task management functions are supported and cache */
	h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
4278 4279
}

4280 4281
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
A
Akinobu Mita 已提交
4282
	if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
4283 4284 4285 4286 4287 4288
		dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
		return false;
	}
	return true;
}

4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300
/* Need to enable prefetch in the SCSI core for 6400 in x86 */
static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
{
#ifdef CONFIG_X86
	u32 prefetch;

	prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
	prefetch |= 0x100;
	writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
#endif
}

4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314
/* 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);
}

4315
static void hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
4316 4317
{
	int i;
4318 4319
	u32 doorbell_value;
	unsigned long flags;
4320 4321 4322 4323 4324 4325

	/* 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.)
	 */
	for (i = 0; i < MAX_CONFIG_WAIT; i++) {
4326 4327 4328
		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
4329
		if (!(doorbell_value & CFGTBL_ChangeReq))
4330 4331
			break;
		/* delay and try again */
4332
		usleep_range(10000, 20000);
4333
	}
4334 4335
}

4336
static int hpsa_enter_simple_mode(struct ctlr_info *h)
4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348
{
	u32 trans_support;

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

	h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
	hpsa_wait_for_mode_change_ack(h);
4349 4350 4351 4352 4353 4354
	print_cfg_table(&h->pdev->dev, h->cfgtable);
	if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
		dev_warn(&h->pdev->dev,
			"unable to get board into simple mode\n");
		return -ENODEV;
	}
4355
	h->transMethod = CFGTBL_Trans_Simple;
4356 4357 4358
	return 0;
}

4359
static int hpsa_pci_init(struct ctlr_info *h)
4360
{
4361
	int prod_index, err;
4362

4363 4364 4365 4366 4367
	prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
	if (prod_index < 0)
		return -ENODEV;
	h->product_name = products[prod_index].product_name;
	h->access = *(products[prod_index].access);
4368

M
Matthew Garrett 已提交
4369 4370 4371
	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);

4372
	err = pci_enable_device(h->pdev);
4373
	if (err) {
4374
		dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
4375 4376 4377
		return err;
	}

4378 4379 4380
	/* Enable bus mastering (pci_disable_device may disable this) */
	pci_set_master(h->pdev);

4381
	err = pci_request_regions(h->pdev, HPSA);
4382
	if (err) {
4383 4384
		dev_err(&h->pdev->dev,
			"cannot obtain PCI resources, aborting\n");
4385 4386
		return err;
	}
4387
	hpsa_interrupt_mode(h);
4388
	err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
4389
	if (err)
4390 4391
		goto err_out_free_res;
	h->vaddr = remap_pci_mem(h->paddr, 0x250);
4392 4393 4394 4395
	if (!h->vaddr) {
		err = -ENOMEM;
		goto err_out_free_res;
	}
4396
	err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
4397
	if (err)
4398
		goto err_out_free_res;
4399 4400
	err = hpsa_find_cfgtables(h);
	if (err)
4401
		goto err_out_free_res;
4402
	hpsa_find_board_params(h);
4403

4404
	if (!hpsa_CISS_signature_present(h)) {
4405 4406 4407
		err = -ENODEV;
		goto err_out_free_res;
	}
4408
	hpsa_enable_scsi_prefetch(h);
4409
	hpsa_p600_dma_prefetch_quirk(h);
4410 4411
	err = hpsa_enter_simple_mode(h);
	if (err)
4412 4413 4414 4415
		goto err_out_free_res;
	return 0;

err_out_free_res:
4416 4417 4418 4419 4420 4421
	if (h->transtable)
		iounmap(h->transtable);
	if (h->cfgtable)
		iounmap(h->cfgtable);
	if (h->vaddr)
		iounmap(h->vaddr);
4422
	pci_disable_device(h->pdev);
4423
	pci_release_regions(h->pdev);
4424 4425 4426
	return err;
}

4427
static void hpsa_hba_inquiry(struct ctlr_info *h)
4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442
{
	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;
	}
}

4443
static int hpsa_init_reset_devices(struct pci_dev *pdev)
4444
{
4445
	int rc, i;
4446 4447 4448 4449

	if (!reset_devices)
		return 0;

4450 4451
	/* Reset the controller with a PCI power-cycle or via doorbell */
	rc = hpsa_kdump_hard_reset_controller(pdev);
4452

4453 4454
	/* -ENOTSUPP here means we cannot reset the controller
	 * but it's already (and still) up and running in
4455 4456
	 * "performant mode".  Or, it might be 640x, which can't reset
	 * due to concerns about shared bbwc between 6402/6404 pair.
4457 4458
	 */
	if (rc == -ENOTSUPP)
4459
		return rc; /* just try to do the kdump anyhow. */
4460 4461
	if (rc)
		return -ENODEV;
4462 4463

	/* Now try to get the controller to respond to a no-op */
4464
	dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
4465 4466 4467 4468 4469 4470 4471 4472 4473 4474
	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" : ""));
	}
	return 0;
}

4475
static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508
{
	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__);
		return -ENOMEM;
	}
	return 0;
}

static void hpsa_free_cmd_pool(struct ctlr_info *h)
{
	kfree(h->cmd_pool_bits);
	if (h->cmd_pool)
		pci_free_consistent(h->pdev,
			    h->nr_cmds * sizeof(struct CommandList),
			    h->cmd_pool, h->cmd_pool_dhandle);
	if (h->errinfo_pool)
		pci_free_consistent(h->pdev,
			    h->nr_cmds * sizeof(struct ErrorInfo),
			    h->errinfo_pool,
			    h->errinfo_pool_dhandle);
}

4509 4510 4511 4512
static int hpsa_request_irq(struct ctlr_info *h,
	irqreturn_t (*msixhandler)(int, void *),
	irqreturn_t (*intxhandler)(int, void *))
{
4513
	int rc, i;
4514

4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539
	/*
	 * 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;

	if (h->intr_mode == PERF_MODE_INT && h->msix_vector) {
		/* If performant mode and MSI-X, use multiple reply queues */
		for (i = 0; i < MAX_REPLY_QUEUES; i++)
			rc = request_irq(h->intr[i], msixhandler,
					0, h->devname,
					&h->q[i]);
	} else {
		/* Use single reply pool */
		if (h->msix_vector || h->msi_vector) {
			rc = request_irq(h->intr[h->intr_mode],
				msixhandler, 0, h->devname,
				&h->q[h->intr_mode]);
		} else {
			rc = request_irq(h->intr[h->intr_mode],
				intxhandler, IRQF_SHARED, h->devname,
				&h->q[h->intr_mode]);
		}
	}
4540 4541 4542 4543 4544 4545 4546 4547
	if (rc) {
		dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
		       h->intr[h->intr_mode], h->devname);
		return -ENODEV;
	}
	return 0;
}

4548
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571
{
	if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
		HPSA_RESET_TYPE_CONTROLLER)) {
		dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
		return -EIO;
	}

	dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
	if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
		dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
		return -1;
	}

	dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
	if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
		dev_warn(&h->pdev->dev, "Board failed to become ready "
			"after soft reset.\n");
		return -1;
	}

	return 0;
}

4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586
static void free_irqs(struct ctlr_info *h)
{
	int i;

	if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
		/* Single reply queue, only one irq to free */
		i = h->intr_mode;
		free_irq(h->intr[i], &h->q[i]);
		return;
	}

	for (i = 0; i < MAX_REPLY_QUEUES; i++)
		free_irq(h->intr[i], &h->q[i]);
}

4587
static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)
4588
{
4589
	free_irqs(h);
4590
#ifdef CONFIG_PCI_MSI
4591 4592 4593 4594 4595 4596 4597
	if (h->msix_vector) {
		if (h->pdev->msix_enabled)
			pci_disable_msix(h->pdev);
	} else if (h->msi_vector) {
		if (h->pdev->msi_enabled)
			pci_disable_msi(h->pdev);
	}
4598
#endif /* CONFIG_PCI_MSI */
4599 4600 4601 4602 4603
}

static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
	hpsa_free_irqs_and_disable_msix(h);
4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618
	hpsa_free_sg_chain_blocks(h);
	hpsa_free_cmd_pool(h);
	kfree(h->blockFetchTable);
	pci_free_consistent(h->pdev, h->reply_pool_size,
		h->reply_pool, h->reply_pool_dhandle);
	if (h->vaddr)
		iounmap(h->vaddr);
	if (h->transtable)
		iounmap(h->transtable);
	if (h->cfgtable)
		iounmap(h->cfgtable);
	pci_release_regions(h->pdev);
	kfree(h);
}

4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638
static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h)
{
	assert_spin_locked(&lockup_detector_lock);
	if (!hpsa_lockup_detector)
		return;
	if (h->lockup_detected)
		return; /* already stopped the lockup detector */
	list_del(&h->lockup_list);
}

/* Called when controller lockup detected. */
static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list)
{
	struct CommandList *c = NULL;

	assert_spin_locked(&h->lock);
	/* Mark all outstanding commands as failed and complete them. */
	while (!list_empty(list)) {
		c = list_entry(list->next, struct CommandList, list);
		c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4639
		finish_cmd(c);
4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671
	}
}

static void controller_lockup_detected(struct ctlr_info *h)
{
	unsigned long flags;

	assert_spin_locked(&lockup_detector_lock);
	remove_ctlr_from_lockup_detector_list(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
	spin_lock_irqsave(&h->lock, flags);
	h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
	spin_unlock_irqrestore(&h->lock, flags);
	dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x\n",
			h->lockup_detected);
	pci_disable_device(h->pdev);
	spin_lock_irqsave(&h->lock, flags);
	fail_all_cmds_on_list(h, &h->cmpQ);
	fail_all_cmds_on_list(h, &h->reqQ);
	spin_unlock_irqrestore(&h->lock, flags);
}

static void detect_controller_lockup(struct ctlr_info *h)
{
	u64 now;
	u32 heartbeat;
	unsigned long flags;

	assert_spin_locked(&lockup_detector_lock);
	now = get_jiffies_64();
	/* If we've received an interrupt recently, we're ok. */
	if (time_after64(h->last_intr_timestamp +
4672
				(h->heartbeat_sample_interval), now))
4673 4674 4675 4676 4677 4678 4679 4680
		return;

	/*
	 * 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 +
4681
				(h->heartbeat_sample_interval), now))
4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722
		return;

	/* 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);
		return;
	}

	/* We're ok. */
	h->last_heartbeat = heartbeat;
	h->last_heartbeat_timestamp = now;
}

static int detect_controller_lockup_thread(void *notused)
{
	struct ctlr_info *h;
	unsigned long flags;

	while (1) {
		struct list_head *this, *tmp;

		schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL);
		if (kthread_should_stop())
			break;
		spin_lock_irqsave(&lockup_detector_lock, flags);
		list_for_each_safe(this, tmp, &hpsa_ctlr_list) {
			h = list_entry(this, struct ctlr_info, lockup_list);
			detect_controller_lockup(h);
		}
		spin_unlock_irqrestore(&lockup_detector_lock, flags);
	}
	return 0;
}

static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h)
{
	unsigned long flags;

4723
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735
	spin_lock_irqsave(&lockup_detector_lock, flags);
	list_add_tail(&h->lockup_list, &hpsa_ctlr_list);
	spin_unlock_irqrestore(&lockup_detector_lock, flags);
}

static void start_controller_lockup_detector(struct ctlr_info *h)
{
	/* Start the lockup detector thread if not already started */
	if (!hpsa_lockup_detector) {
		spin_lock_init(&lockup_detector_lock);
		hpsa_lockup_detector =
			kthread_run(detect_controller_lockup_thread,
4736
						NULL, HPSA);
4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753
	}
	if (!hpsa_lockup_detector) {
		dev_warn(&h->pdev->dev,
			"Could not start lockup detector thread\n");
		return;
	}
	add_ctlr_to_lockup_detector_list(h);
}

static void stop_controller_lockup_detector(struct ctlr_info *h)
{
	unsigned long flags;

	spin_lock_irqsave(&lockup_detector_lock, flags);
	remove_ctlr_from_lockup_detector_list(h);
	/* If the list of ctlr's to monitor is empty, stop the thread */
	if (list_empty(&hpsa_ctlr_list)) {
4754
		spin_unlock_irqrestore(&lockup_detector_lock, flags);
4755
		kthread_stop(hpsa_lockup_detector);
4756
		spin_lock_irqsave(&lockup_detector_lock, flags);
4757 4758 4759 4760 4761
		hpsa_lockup_detector = NULL;
	}
	spin_unlock_irqrestore(&lockup_detector_lock, flags);
}

4762
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
4763
{
4764
	int dac, rc;
4765
	struct ctlr_info *h;
4766 4767
	int try_soft_reset = 0;
	unsigned long flags;
4768 4769 4770 4771

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

4772
	rc = hpsa_init_reset_devices(pdev);
4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785
	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:
4786

4787 4788 4789 4790 4791 4792
	/* 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.
	 */
#define COMMANDLIST_ALIGNMENT 32
	BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4793 4794
	h = kzalloc(sizeof(*h), GFP_KERNEL);
	if (!h)
4795
		return -ENOMEM;
4796

4797
	h->pdev = pdev;
4798
	h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4799 4800
	INIT_LIST_HEAD(&h->cmpQ);
	INIT_LIST_HEAD(&h->reqQ);
4801 4802
	spin_lock_init(&h->lock);
	spin_lock_init(&h->scan_lock);
4803
	rc = hpsa_pci_init(h);
4804
	if (rc != 0)
4805 4806
		goto clean1;

4807
	sprintf(h->devname, HPSA "%d", number_of_controllers);
4808 4809 4810 4811
	h->ctlr = number_of_controllers;
	number_of_controllers++;

	/* configure PCI DMA stuff */
4812 4813
	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc == 0) {
4814
		dac = 1;
4815 4816 4817 4818 4819 4820 4821 4822
	} 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");
			goto clean1;
		}
4823 4824 4825 4826
	}

	/* make sure the board interrupts are off */
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
4827

4828
	if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4829
		goto clean2;
4830 4831
	dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
	       h->devname, pdev->device,
4832
	       h->intr[h->intr_mode], dac ? "" : " not");
4833
	if (hpsa_allocate_cmd_pool(h))
4834
		goto clean4;
4835 4836
	if (hpsa_allocate_sg_chain_blocks(h))
		goto clean4;
4837 4838
	init_waitqueue_head(&h->scan_wait_queue);
	h->scan_finished = 1; /* no scan currently in progress */
4839 4840

	pci_set_drvdata(pdev, h);
4841 4842 4843
	h->ndevices = 0;
	h->scsi_host = NULL;
	spin_lock_init(&h->devlock);
4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861
	hpsa_put_ctlr_into_performant_mode(h);

	/* At this point, the controller is ready to take commands.
	 * 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);
4862
		free_irqs(h);
4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899
		rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
					hpsa_intx_discard_completions);
		if (rc) {
			dev_warn(&h->pdev->dev, "Failed to request_irq after "
				"soft reset.\n");
			goto clean4;
		}

		rc = hpsa_kdump_soft_reset(h);
		if (rc)
			/* Neither hard nor soft reset worked, we're hosed. */
			goto clean4;

		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)
			/* don't go to clean4, we already unallocated */
			return -ENODEV;

		goto reinit_after_soft_reset;
	}
4900 4901 4902 4903

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

4904
	hpsa_hba_inquiry(h);
4905
	hpsa_register_scsi(h);	/* hook ourselves into SCSI subsystem */
4906
	start_controller_lockup_detector(h);
4907 4908 4909
	return 1;

clean4:
4910
	hpsa_free_sg_chain_blocks(h);
4911
	hpsa_free_cmd_pool(h);
4912
	free_irqs(h);
4913 4914 4915
clean2:
clean1:
	kfree(h);
4916
	return rc;
4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932
}

static void hpsa_flush_cache(struct ctlr_info *h)
{
	char *flush_buf;
	struct CommandList *c;

	flush_buf = kzalloc(4, GFP_KERNEL);
	if (!flush_buf)
		return;

	c = cmd_special_alloc(h);
	if (!c) {
		dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
		goto out_of_memory;
	}
4933 4934 4935 4936
	if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD)) {
		goto out;
	}
4937 4938
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
	if (c->err_info->CommandStatus != 0)
4939
out:
4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957
		dev_warn(&h->pdev->dev,
			"error flushing cache on controller\n");
	cmd_special_free(h, c);
out_of_memory:
	kfree(flush_buf);
}

static void hpsa_shutdown(struct pci_dev *pdev)
{
	struct ctlr_info *h;

	h = pci_get_drvdata(pdev);
	/* Turn board interrupts off  and send the flush cache command
	 * sendcmd will turn off interrupt, and send the flush...
	 * To write all data in the battery backed cache to disks
	 */
	hpsa_flush_cache(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
4958
	hpsa_free_irqs_and_disable_msix(h);
4959 4960
}

4961
static void hpsa_free_device_info(struct ctlr_info *h)
4962 4963 4964 4965 4966 4967 4968
{
	int i;

	for (i = 0; i < h->ndevices; i++)
		kfree(h->dev[i]);
}

4969
static void hpsa_remove_one(struct pci_dev *pdev)
4970 4971 4972 4973
{
	struct ctlr_info *h;

	if (pci_get_drvdata(pdev) == NULL) {
4974
		dev_err(&pdev->dev, "unable to remove device\n");
4975 4976 4977
		return;
	}
	h = pci_get_drvdata(pdev);
4978
	stop_controller_lockup_detector(h);
4979 4980 4981
	hpsa_unregister_scsi(h);	/* unhook from SCSI subsystem */
	hpsa_shutdown(pdev);
	iounmap(h->vaddr);
4982 4983
	iounmap(h->transtable);
	iounmap(h->cfgtable);
4984
	hpsa_free_device_info(h);
4985
	hpsa_free_sg_chain_blocks(h);
4986 4987 4988 4989 4990 4991
	pci_free_consistent(h->pdev,
		h->nr_cmds * sizeof(struct CommandList),
		h->cmd_pool, h->cmd_pool_dhandle);
	pci_free_consistent(h->pdev,
		h->nr_cmds * sizeof(struct ErrorInfo),
		h->errinfo_pool, h->errinfo_pool_dhandle);
4992 4993
	pci_free_consistent(h->pdev, h->reply_pool_size,
		h->reply_pool, h->reply_pool_dhandle);
4994
	kfree(h->cmd_pool_bits);
4995
	kfree(h->blockFetchTable);
4996
	kfree(h->hba_inquiry_data);
4997
	pci_disable_device(pdev);
4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014
	pci_release_regions(pdev);
	pci_set_drvdata(pdev, NULL);
	kfree(h);
}

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 = {
5015
	.name = HPSA,
5016
	.probe = hpsa_init_one,
5017
	.remove = hpsa_remove_one,
5018 5019 5020 5021 5022 5023
	.id_table = hpsa_pci_device_id,	/* id_table */
	.shutdown = hpsa_shutdown,
	.suspend = hpsa_suspend,
	.resume = hpsa_resume,
};

5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060
/* 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,
	int nsgs, int *bucket_map)
{
	int i, j, b, size;

	/* even a command with 0 SGs requires 4 blocks */
#define MINIMUM_TRANSFER_BLOCKS 4
#define NUM_BUCKETS 8
	/* Note, bucket_map must have nsgs+1 entries. */
	for (i = 0; i <= nsgs; i++) {
		/* Compute size of a command with i SG entries */
		size = i + MINIMUM_TRANSFER_BLOCKS;
		b = num_buckets; /* Assume the biggest bucket */
		/* Find the bucket that is just big enough */
		for (j = 0; j < 8; j++) {
			if (bucket[j] >= size) {
				b = j;
				break;
			}
		}
		/* for a command with i SG entries, use bucket b. */
		bucket_map[i] = b;
	}
}

5061
static void hpsa_enter_performant_mode(struct ctlr_info *h, u32 use_short_tags)
5062
{
5063 5064
	int i;
	unsigned long register_value;
5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075

	/* 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.
5076
	 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
5077 5078 5079 5080 5081 5082
	 * 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.
	 */
5083 5084
	int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
	BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
5085 5086 5087 5088 5089 5090 5091 5092 5093
	/*  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
	 */

	/* Controller spec: zero out this buffer. */
	memset(h->reply_pool, 0, h->reply_pool_size);

5094 5095 5096
	bft[7] = SG_ENTRIES_IN_CMD + 4;
	calc_bucket_map(bft, ARRAY_SIZE(bft),
				SG_ENTRIES_IN_CMD, h->blockFetchTable);
5097 5098 5099 5100 5101
	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);
5102
	writel(h->nreply_queues, &h->transtable->RepQCount);
5103 5104
	writel(0, &h->transtable->RepQCtrAddrLow32);
	writel(0, &h->transtable->RepQCtrAddrHigh32);
5105 5106 5107 5108 5109 5110 5111 5112 5113 5114

	for (i = 0; i < h->nreply_queues; i++) {
		writel(0, &h->transtable->RepQAddr[i].upper);
		writel(h->reply_pool_dhandle +
			(h->max_commands * sizeof(u64) * i),
			&h->transtable->RepQAddr[i].lower);
	}

	writel(CFGTBL_Trans_Performant | use_short_tags |
		CFGTBL_Trans_enable_directed_msix,
5115 5116
		&(h->cfgtable->HostWrite.TransportRequest));
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
5117
	hpsa_wait_for_mode_change_ack(h);
5118 5119 5120 5121 5122 5123
	register_value = readl(&(h->cfgtable->TransportActive));
	if (!(register_value & CFGTBL_Trans_Performant)) {
		dev_warn(&h->pdev->dev, "unable to get board into"
					" performant mode\n");
		return;
	}
5124 5125 5126
	/* Change the access methods to the performant access methods */
	h->access = SA5_performant_access;
	h->transMethod = CFGTBL_Trans_Performant;
5127 5128
}

5129
static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
5130 5131
{
	u32 trans_support;
5132
	int i;
5133

5134 5135 5136
	if (hpsa_simple_mode)
		return;

5137 5138 5139 5140
	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & PERFORMANT_MODE))
		return;

5141
	h->nreply_queues = h->msix_vector ? MAX_REPLY_QUEUES : 1;
5142
	hpsa_get_max_perf_mode_cmds(h);
5143
	/* Performant mode ring buffer and supporting data structures */
5144
	h->reply_pool_size = h->max_commands * sizeof(u64) * h->nreply_queues;
5145 5146 5147
	h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
				&(h->reply_pool_dhandle));

5148 5149 5150 5151 5152 5153 5154
	for (i = 0; i < h->nreply_queues; i++) {
		h->reply_queue[i].head = &h->reply_pool[h->max_commands * i];
		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;
	}

5155
	/* Need a block fetch table for performant mode */
5156
	h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
5157 5158 5159 5160 5161 5162
				sizeof(u32)), GFP_KERNEL);

	if ((h->reply_pool == NULL)
		|| (h->blockFetchTable == NULL))
		goto clean_up;

5163 5164
	hpsa_enter_performant_mode(h,
		trans_support & CFGTBL_Trans_use_short_tags);
5165 5166 5167 5168 5169 5170 5171 5172 5173 5174

	return;

clean_up:
	if (h->reply_pool)
		pci_free_consistent(h->pdev, h->reply_pool_size,
			h->reply_pool, h->reply_pool_dhandle);
	kfree(h->blockFetchTable);
}

5175 5176 5177 5178 5179 5180
/*
 *  This is it.  Register the PCI driver information for the cards we control
 *  the OS will call our registered routines when it finds one of our cards.
 */
static int __init hpsa_init(void)
{
M
Mike Miller 已提交
5181
	return pci_register_driver(&hpsa_pci_driver);
5182 5183 5184 5185 5186 5187 5188 5189 5190
}

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

module_init(hpsa_init);
module_exit(hpsa_cleanup);