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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>
#include <linux/pci-aspm.h>
#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>
#include <scsi/scsi_tcq.h>
#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
#include <linux/atomic.h>
#include <linux/kthread.h>
#include <linux/jiffies.h>
#include "hpsa_cmd.h"
#include "hpsa.h"
/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
#define HPSA_DRIVER_VERSION "2.0.2-1"
#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
#define HPSA "hpsa"
/* 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");
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'");
/* 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},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233},
{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},
{PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
{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},
{0x3350103C, "Smart Array", &SA5_access},
{0x3351103C, "Smart Array", &SA5_access},
{0x3352103C, "Smart Array", &SA5_access},
{0x3353103C, "Smart Array", &SA5_access},
{0x3354103C, "Smart Array", &SA5_access},
{0x3355103C, "Smart Array", &SA5_access},
{0x3356103C, "Smart Array", &SA5_access},
{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};
static int number_of_controllers;
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;
static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
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);
static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
int cmd_type);
static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
unsigned long elapsed_time);
static int hpsa_change_queue_depth(struct scsi_device *sdev,
int qdepth, int reason);
static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
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);
/* performant mode helper functions */
static void calc_bucket_map(int *bucket, int num_buckets,
int nsgs, int *bucket_map);
static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
static inline u32 next_command(struct ctlr_info *h, u8 q);
static int __devinit 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 __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
unsigned long *memory_bar);
static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
void __iomem *vaddr, int wait_for_ready);
static inline void finish_cmd(struct CommandList *c);
#define BOARD_NOT_READY 0
#define BOARD_READY 1
static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
{
unsigned long *priv = shost_priv(sdev->host);
return (struct ctlr_info *) *priv;
}
static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
{
unsigned long *priv = shost_priv(sh);
return (struct ctlr_info *) *priv;
}
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:
dev_warn(&h->pdev->dev, HPSA "%d: a state change "
"detected, command retried\n", h->ctlr);
break;
case LUN_FAILED:
dev_warn(&h->pdev->dev, HPSA "%d: LUN failure "
"detected, action required\n", h->ctlr);
break;
case REPORT_LUNS_CHANGED:
dev_warn(&h->pdev->dev, HPSA "%d: report LUN data "
"changed, action required\n", h->ctlr);
/*
* Note: this REPORT_LUNS_CHANGED condition only occurs on the external
* target (array) devices.
*/
break;
case POWER_OR_RESET:
dev_warn(&h->pdev->dev, HPSA "%d: a power on "
"or device reset detected\n", h->ctlr);
break;
case UNIT_ATTENTION_CLEARED:
dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
"cleared by another initiator\n", h->ctlr);
break;
default:
dev_warn(&h->pdev->dev, HPSA "%d: unknown "
"unit attention detected\n", h->ctlr);
break;
}
return 1;
}
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;
}
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);
h = shost_to_hba(shost);
hpsa_scan_start(h->scsi_host);
return count;
}
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]);
}
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);
}
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",
h->transMethod & CFGTBL_Trans_Performant ?
"performant" : "simple");
}
/* List of controllers which cannot be hard reset on kexec with reset_devices */
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 */
0x40800E11, /* Smart Array 5i */
0x409C0E11, /* Smart Array 6400 */
0x409D0E11, /* Smart Array 6400 EM */
0x40700E11, /* Smart Array 5300 */
0x40820E11, /* Smart Array 532 */
0x40830E11, /* Smart Array 5312 */
0x409A0E11, /* Smart Array 641 */
0x409B0E11, /* Smart Array 642 */
0x40910E11, /* Smart Array 6i */
};
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
0x40800E11, /* Smart Array 5i */
0x40700E11, /* Smart Array 5300 */
0x40820E11, /* Smart Array 532 */
0x40830E11, /* Smart Array 5312 */
0x409A0E11, /* Smart Array 641 */
0x409B0E11, /* Smart Array 642 */
0x40910E11, /* Smart Array 6i */
/* 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)
{
int i;
for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
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)
return 0;
return 1;
}
static int ctlr_is_resettable(u32 board_id)
{
return ctlr_is_hard_resettable(board_id) ||
ctlr_is_soft_resettable(board_id);
}
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);
return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
}
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",
"1(ADM)", "UNKNOWN"
};
#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;
unsigned char rlevel;
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);
if (rlevel > RAID_UNKNOWN)
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]);
}
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);
static DEVICE_ATTR(resettable, S_IRUGO,
host_show_resettable, NULL);
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,
&dev_attr_resettable,
NULL,
};
static struct scsi_host_template hpsa_driver_template = {
.module = THIS_MODULE,
.name = HPSA,
.proc_name = HPSA,
.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,
.eh_abort_handler = hpsa_eh_abort_handler,
.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,
.max_sectors = 8192,
};
/* Enqueuing and dequeuing functions for cmdlists. */
static inline void addQ(struct list_head *list, struct CommandList *c)
{
list_add_tail(&c->list, list);
}
static inline u32 next_command(struct ctlr_info *h, u8 q)
{
u32 a;
struct reply_pool *rq = &h->reply_queue[q];
unsigned long flags;
if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
return h->access.command_completed(h, q);
if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
a = rq->head[rq->current_entry];
rq->current_entry++;
spin_lock_irqsave(&h->lock, flags);
h->commands_outstanding--;
spin_unlock_irqrestore(&h->lock, flags);
} else {
a = FIFO_EMPTY;
}
/* Check for wraparound */
if (rq->current_entry == h->max_commands) {
rq->current_entry = 0;
rq->wraparound ^= 1;
}
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)
{
if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
if (likely(h->msix_vector))
c->Header.ReplyQueue =
smp_processor_id() % h->nreply_queues;
}
}
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;
}
static void enqueue_cmd_and_start_io(struct ctlr_info *h,
struct CommandList *c)
{
unsigned long flags;
set_performant_mode(h, c);
dial_down_lockup_detection_during_fw_flash(h, c);
spin_lock_irqsave(&h->lock, flags);
addQ(&h->reqQ, c);
h->Qdepth++;
spin_unlock_irqrestore(&h->lock, flags);
start_io(h);
}
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;
}
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;
DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
for (i = 0; i < h->ndevices; i++) {
if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
__set_bit(h->dev[i]->target, lun_taken);
}
i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
if (i < HPSA_MAX_DEVICES) {
/* *bus = 1; */
*target = i;
*lun = 0;
found = 1;
}
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;
if (n >= HPSA_MAX_DEVICES) {
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;
}
/* 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);
}
/* 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 */
BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
removed[*nremoved] = h->dev[entry];
(*nremoved)++;
/*
* 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;
}
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);
}
/* 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;
BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
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;
}
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;
}
/* 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
* 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.
*/
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
#define DEVICE_UPDATED 3
for (i = 0; i < haystack_size; i++) {
if (haystack[i] == NULL) /* previously removed. */
continue;
if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
*index = i;
if (device_is_the_same(needle, haystack[i])) {
if (device_updated(needle, haystack[i]))
return DEVICE_UPDATED;
return DEVICE_SAME;
} else {
return DEVICE_CHANGED;
}
}
}
*index = -1;
return DEVICE_NOT_FOUND;
}
static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
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;
added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
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.
* If minor device attributes change, just update
* the existing device structure.
*/
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++;
hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
added, &nadded, removed, &nremoved);
/* Set it to NULL to prevent it from being freed
* at the bottom of hpsa_update_scsi_devices()
*/
sd[entry] = NULL;
} else if (device_change == DEVICE_UPDATED) {
hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
}
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)
{
/* nothing to do. */
}
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;
}
static void hpsa_map_sg_chain_block(struct ctlr_info *h,
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);
chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
}
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);
}
static void complete_scsi_command(struct CommandList *cp)
{
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 */
unsigned long sense_data_size;
ei = cp->err_info;
cmd = (struct scsi_cmnd *) cp->scsi_cmd;
h = cp->h;
scsi_dma_unmap(cmd); /* undo the DMA mappings */
if (cp->Header.SGTotal > h->max_cmd_sg_entries)
hpsa_unmap_sg_chain_block(h, cp);
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
cmd->result |= ei->ScsiStatus;
/* copy the sense data whether we need to or not. */
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);
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;
}
}
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;
}
/* Must be some other type of check condition */
dev_dbg(&h->pdev->dev, "cp %p has check condition: "
"unknown type: "
"Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
"Returning result: 0x%x, "
"cmd=[%02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x "
"%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],
cmd->cmnd[8], cmd->cmnd[9],
cmd->cmnd[10], cmd->cmnd[11],
cmd->cmnd[12], cmd->cmnd[13],
cmd->cmnd[14], cmd->cmnd[15]);
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:
dev_warn(&h->pdev->dev, "cp %p has "
"protocol error \n", cp);
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:
cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
"abort\n", cp);
break;
case CMD_TIMEOUT:
cmd->result = DID_TIME_OUT << 16;
dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
break;
case CMD_UNABORTABLE:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "Command unabortable\n");
break;
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);
}
}
static void hpsa_map_one(struct pci_dev *pdev,
struct CommandList *cp,
unsigned char *buf,
size_t buflen,
int data_direction)
{
u64 addr64;
if (buflen == 0 || data_direction == PCI_DMA_NONE) {
cp->Header.SGList = 0;
cp->Header.SGTotal = 0;
return;
}
addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
cp->SG[0].Addr.lower =
(u32) (addr64 & (u64) 0x00000000FFFFFFFF);
cp->SG[0].Addr.upper =
(u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
cp->SG[0].Len = buflen;
cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */
cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
}
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);
}
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);
}
}
#define MAX_DRIVER_CMD_RETRIES 25
static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
struct CommandList *c, int data_direction)
{
int backoff_time = 10, retry_count = 0;
do {
memset(c->err_info, 0, sizeof(*c->err_info));
hpsa_scsi_do_simple_cmd_core(h, c);
retry_count++;
if (retry_count > 3) {
msleep(backoff_time);
if (backoff_time < 1000)
backoff_time *= 2;
}
} while ((check_for_unit_attention(h, c) ||
check_for_busy(h, c)) &&
retry_count <= MAX_DRIVER_CMD_RETRIES);
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;
case CMD_UNABORTABLE:
dev_warn(d, "Command unabortable\n");
break;
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");
return -ENOMEM;
}
fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
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;
}
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");
return -ENOMEM;
}
fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
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;
}
/* address the controller */
memset(scsi3addr, 0, sizeof(scsi3addr));
fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
buf, bufsize, 0, scsi3addr, TYPE_CMD);
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;
}
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,
unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
unsigned char *is_OBDR_device)
{
#define OBDR_SIG_OFFSET 43
#define OBDR_TAPE_SIG "$DR-10"
#define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
#define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
unsigned char *inq_buff;
unsigned char *obdr_sig;
inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
if (!inq_buff)
goto bail_out;
/* Do an inquiry to the device to see what it is. */
if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
(unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
/* Inquiry failed (msg printed already) */
dev_err(&h->pdev->dev,
"hpsa_update_device_info: inquiry failed\n");
goto bail_out;
}
this_device->devtype = (inq_buff[0] & 0x1f);
memcpy(this_device->scsi3addr, scsi3addr, 8);
memcpy(this_device->vendor, &inq_buff[8],
sizeof(this_device->vendor));
memcpy(this_device->model, &inq_buff[16],
sizeof(this_device->model));
memset(this_device->device_id, 0,
sizeof(this_device->device_id));
hpsa_get_device_id(h, scsi3addr, this_device->device_id,
sizeof(this_device->device_id));
if (this_device->devtype == TYPE_DISK &&
is_logical_dev_addr_mode(scsi3addr))
hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
else
this_device->raid_level = RAID_UNKNOWN;
if (is_OBDR_device) {
/* See if this is a One-Button-Disaster-Recovery device
* by looking for "$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);
}
kfree(inq_buff);
return 0;
bail_out:
kfree(inq_buff);
return 1;
}
static unsigned char *ext_target_model[] = {
"MSA2012",
"MSA2024",
"MSA2312",
"MSA2324",
"P2000 G3 SAS",
NULL,
};
static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
int i;
for (i = 0; ext_target_model[i]; i++)
if (strncmp(device->model, ext_target_model[i],
strlen(ext_target_model[i])) == 0)
return 1;
return 0;
}
/* Helper function to assign bus, target, lun mapping of devices.
* Puts non-external target logical volumes on bus 0, external target logical
* 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,
u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
{
u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
if (!is_logical_dev_addr_mode(lunaddrbytes)) {
/* physical device, target and lun filled in later */
if (is_hba_lunid(lunaddrbytes))
hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
else
/* defer target, lun assignment for physical devices */
hpsa_set_bus_target_lun(device, 2, -1, -1);
return;
}
/* It's a logical device */
if (is_ext_target(h, device)) {
/* external target way, put logicals on bus 1
* 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;
}
hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
}
/*
* If there is no lun 0 on a target, linux won't find any devices.
* For the external targets (arrays), we have to manually detect the enclosure
* 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.
*/
static int add_ext_target_dev(struct ctlr_info *h,
struct hpsa_scsi_dev_t *tmpdevice,
struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
unsigned long lunzerobits[], int *n_ext_target_devs)
{
unsigned char scsi3addr[8];
if (test_bit(tmpdevice->target, lunzerobits))
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. */
if (!is_ext_target(h, tmpdevice))
return 0; /* Only external target devices have this problem. */
if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
return 0;
memset(scsi3addr, 0, 8);
scsi3addr[3] = tmpdevice->target;
if (is_hba_lunid(scsi3addr))
return 0; /* Don't add the RAID controller here. */
if (is_scsi_rev_5(h))
return 0; /* p1210m doesn't need to do this. */
if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
dev_warn(&h->pdev->dev, "Maximum number of external "
"target devices exceeded. Check your hardware "
"configuration.");
return 0;
}
if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
return 0;
(*n_ext_target_devs)++;
hpsa_set_bus_target_lun(this_device,
tmpdevice->bus, tmpdevice->target, 0);
set_bit(tmpdevice->target, lunzerobits);
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,
struct ReportLUNdata *physdev, u32 *nphysicals,
struct ReportLUNdata *logdev, u32 *nlogicals)
{
if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
return -1;
}
*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
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;
}
*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
/* 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;
}
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;
}
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;
u32 nphysicals = 0;
u32 nlogicals = 0;
u32 ndev_allocated = 0;
struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
int ncurrent = 0;
int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
int i, n_ext_target_devs, ndevs_to_allocate;
int raid_ctlr_position;
DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
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;
/* 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.
*/
ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
/* Allocate the per device structures */
for (i = 0; i < ndevs_to_allocate; i++) {
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;
}
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++;
}
if (unlikely(is_scsi_rev_5(h)))
raid_ctlr_position = 0;
else
raid_ctlr_position = nphysicals + nlogicals;
/* adjust our table of devices */
n_ext_target_devs = 0;
for (i = 0; i < nphysicals + nlogicals + 1; i++) {
u8 *lunaddrbytes, is_OBDR = 0;
/* Figure out where the LUN ID info is coming from */
lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
i, nphysicals, nlogicals, physdev_list, logdev_list);
/* skip masked physical devices. */
if (lunaddrbytes[3] & 0xC0 &&
i < nphysicals + (raid_ctlr_position == 0))
continue;
/* Get device type, vendor, model, device id */
if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
&is_OBDR))
continue; /* skip it if we can't talk to it. */
figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
this_device = currentsd[ncurrent];
/*
* For external target devices, we have to insert a LUN 0 which
* 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.
*/
if (add_ext_target_dev(h, tmpdevice, this_device,
lunaddrbytes, lunzerobits,
&n_ext_target_devs)) {
ncurrent++;
this_device = currentsd[ncurrent];
}
*this_device = *tmpdevice;
switch (this_device->devtype) {
case TYPE_ROM:
/* 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.
*/
if (is_OBDR)
ncurrent++;
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;
}
if (ncurrent >= HPSA_MAX_DEVICES)
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.
*/
static int hpsa_scatter_gather(struct ctlr_info *h,
struct CommandList *cp,
struct scsi_cmnd *cmd)
{
unsigned int len;
struct scatterlist *sg;
u64 addr64;
int use_sg, i, sg_index, chained;
struct SGDescriptor *curr_sg;
BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
use_sg = scsi_dma_map(cmd);
if (use_sg < 0)
return use_sg;
if (!use_sg)
goto sglist_finished;
curr_sg = cp->SG;
chained = 0;
sg_index = 0;
scsi_for_each_sg(cmd, sg, use_sg, i) {
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;
}
addr64 = (u64) sg_dma_address(sg);
len = sg_dma_len(sg);
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);
hpsa_map_sg_chain_block(h, cp);
return 0;
}
sglist_finished:
cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */
cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
return 0;
}
static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
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);
if (unlikely(h->lockup_detected)) {
spin_unlock_irqrestore(&h->lock, flags);
cmd->result = DID_ERROR << 16;
done(cmd);
return 0;
}
spin_unlock_irqrestore(&h->lock, flags);
c = cmd_alloc(h);
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);
c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
/* 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