- 根目录:
- drivers
- scsi
- hpsa.c
C++程序
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5191行
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145.03 KB
/*
* 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_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},
{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 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},
{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 int 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 void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
static inline u32 next_command(struct ctlr_info *h, u8 q);
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);
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 int 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);
if (dma_mapping_error(&h->pdev->dev, temp64)) {
/* prevent subsequent unmapping */
chain_sg->Addr.lower = 0;
chain_sg->Addr.upper = 0;
return -1;
}
chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
return 0;
}
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:
cmd->result = DID_ERROR << 16;
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 int 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 0;
}
addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
if (dma_mapping_error(&pdev->dev, addr64)) {
/* Prevent subsequent unmap of something never mapped */
cp->Header.SGList = 0;
cp->Header.SGTotal = 0;
return -1;
}
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 */
return 0;
}
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;
}
if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
page, scsi3addr, TYPE_CMD)) {
rc = -1;
goto out;
}
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;
}
out:
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 can't fail here, no data buffer to map. */
(void) 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));
if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
rc = -1;
goto out;
}
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;
}
out:
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);
if (hpsa_map_sg_chain_block(h, cp)) {
scsi_dma_unmap(cmd);
return -1;
}
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
* 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;
}
if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
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;
}
static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
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;
}
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;
}
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)
{
struct Scsi_Host *sh;
int error;
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;
}
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;
/* 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);
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;
}
dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
/* 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;
}
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];
}
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
struct CommandList *abort, int swizzle)
{
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 can't fail here, no buffer to map */
(void) fill_cmd(c, HPSA_ABORT_MSG, h, abort,
0, 0, scsi3addr, TYPE_MSG);
if (swizzle)
swizzle_abort_tag(&c->Request.CDB[4]);
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;
}
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;
}
/* 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) {
dev_dbg(&h->pdev->dev, "%s Request SUCCEEDED (not known to driver).\n",
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.
*/
rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort);
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;
}
/*
* 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;
unsigned long flags;
spin_lock_irqsave(&h->lock, flags);
do {
i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
if (i == h->nr_cmds) {
spin_unlock_irqrestore(&h->lock, flags);
return NULL;
}
} while (test_and_set_bit
(i & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
h->nr_allocs++;
spin_unlock_irqrestore(&h->lock, flags);
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;
INIT_LIST_HEAD(&c->list);
c->busaddr = (u32) cmd_dma_handle;
temp64.val = (u64) err_dma_handle;
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));
INIT_LIST_HEAD(&c->list);
c->busaddr = (u32) cmd_dma_handle;
temp64.val = (u64) err_dma_handle;
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;
unsigned long flags;
i = c - h->cmd_pool;
spin_lock_irqsave(&h->lock, flags);
clear_bit(i & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG));
h->nr_frees++;
spin_unlock_irqrestore(&h->lock, flags);
}
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),
c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
}
#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;
memset(&arg64, 0, sizeof(arg64));
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;
err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
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;
memset(&arg64, 0, sizeof(arg64));
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;
err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
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_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;
}
}
#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;
int rc = 0;
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;
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)) {
rc = -EFAULT;
goto out_kfree;
}
} else {
memset(buff, 0, iocommand.buf_size);
}
}
c = cmd_special_alloc(h);
if (c == NULL) {
rc = -ENOMEM;
goto out_kfree;
}
/* 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);
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;
}
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*/
}
hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
if (iocommand.buf_size > 0)
hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
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))) {
rc = -EFAULT;
goto out;
}
if (iocommand.Request.Type.Direction == XFER_READ &&
iocommand.buf_size > 0) {
/* Copy the data out of the buffer we created */
if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
rc = -EFAULT;
goto out;
}
}
out:
cmd_special_free(h, c);
out_kfree:
kfree(buff);
return rc;
}
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;
u32 left;
u32 sz;
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;
}
if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
status = -EINVAL;
goto cleanup1;
}
buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
if (!buff) {
status = -ENOMEM;
goto cleanup1;
}
buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
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;
c->Header.SGList = c->Header.SGTotal = sg_used;
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);
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;
}
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;
}
}
hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
if (sg_used)
hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
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;
}
if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
/* 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:
hpsa_scan_start(h->scsi_host);
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;
}
}
static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
u8 reset_type)
{
struct CommandList *c;
c = cmd_alloc(h);
if (!c)
return -ENOMEM;
/* fill_cmd can't fail here, no data buffer to map */
(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
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;
}
static int 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)
{
int pci_dir = XFER_NONE;
struct CommandList *a; /* for commands to be aborted */
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;
c->Request.CDB[7] = (size >> 8) & 0xFF;
c->Request.CDB[8] = size & 0xFF;
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();
return -1;
}
} 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 */
memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
c->Request.CDB[0] = cmd;
c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
/* 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;
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 */
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;
}
if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
return -1;
return 0;
}
/*
* 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;
void __iomem *page_remapped = ioremap_nocache(page_base,
page_offs + size);
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;
unsigned long flags;
spin_lock_irqsave(&h->lock, flags);
while (!list_empty(&h->reqQ)) {
c = list_entry(h->reqQ.next, struct CommandList, list);
/* 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);
/* 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);
}
spin_unlock_irqrestore(&h->lock, flags);
}
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
{
return h->access.command_completed(h, q);
}
static inline bool interrupt_pending(struct ctlr_info *h)
{
return h->access.intr_pending(h);
}
static inline long interrupt_not_for_us(struct ctlr_info *h)
{
return (h->access.intr_pending(h) == 0) ||
(h->interrupts_enabled == 0);
}
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
u32 raw_tag)
{
if (unlikely(tag_index >= h->nr_cmds)) {
dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
return 1;
}
return 0;
}
static inline void finish_cmd(struct CommandList *c)
{
unsigned long flags;
spin_lock_irqsave(&c->h->lock, flags);
removeQ(c);
spin_unlock_irqrestore(&c->h->lock, flags);
dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
if (likely(c->cmd_type == CMD_SCSI))
complete_scsi_command(c);
else if (c->cmd_type == CMD_IOCTL_PEND)
complete(c->waiting);
}
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;
}
static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
{
#define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
#define HPSA_SIMPLE_ERROR_BITS 0x03
if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
return tag & ~HPSA_SIMPLE_ERROR_BITS;
return tag & ~HPSA_PERF_ERROR_BITS;
}
/* process completion of an indexed ("direct lookup") command */
static inline void process_indexed_cmd(struct ctlr_info *h,
u32 raw_tag)
{
u32 tag_index;
struct CommandList *c;
tag_index = hpsa_tag_to_index(raw_tag);
if (!bad_tag(h, tag_index, raw_tag)) {
c = h->cmd_pool + tag_index;
finish_cmd(c);
}
}
/* process completion of a non-indexed command */
static inline void process_nonindexed_cmd(struct ctlr_info *h,
u32 raw_tag)
{
u32 tag;
struct CommandList *c = NULL;
unsigned long flags;
tag = hpsa_tag_discard_error_bits(h, raw_tag);
spin_lock_irqsave(&h->lock, flags);
list_for_each_entry(c, &h->cmpQ, list) {
if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
spin_unlock_irqrestore(&h->lock, flags);
finish_cmd(c);
return;
}
}
spin_unlock_irqrestore(&h->lock, flags);
bad_tag(h, h->nr_cmds + 1, raw_tag);
}
/* 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;
}
/*
* 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)
{
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;
u32 raw_tag;
if (ignore_bogus_interrupt(h))
return IRQ_NONE;
if (interrupt_not_for_us(h))
return IRQ_NONE;
h->last_intr_timestamp = get_jiffies_64();
while (interrupt_pending(h)) {
raw_tag = get_next_completion(h, q);
while (raw_tag != FIFO_EMPTY)
raw_tag = next_command(h, q);
}
return IRQ_HANDLED;
}
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
{
struct ctlr_info *h = queue_to_hba(queue);
u32 raw_tag;
u8 q = *(u8 *) queue;
if (ignore_bogus_interrupt(h))
return IRQ_NONE;
h->last_intr_timestamp = get_jiffies_64();
raw_tag = get_next_completion(h, q);
while (raw_tag != FIFO_EMPTY)
raw_tag = next_command(h, q);
return IRQ_HANDLED;
}
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
{
struct ctlr_info *h = queue_to_hba((u8 *) queue);
u32 raw_tag;
u8 q = *(u8 *) queue;
if (interrupt_not_for_us(h))
return IRQ_NONE;
h->last_intr_timestamp = get_jiffies_64();
while (interrupt_pending(h)) {
raw_tag = get_next_completion(h, q);
while (raw_tag != FIFO_EMPTY) {
if (likely(hpsa_tag_contains_index(raw_tag)))
process_indexed_cmd(h, raw_tag);
else
process_nonindexed_cmd(h, raw_tag);
raw_tag = next_command(h, q);
}
}
return IRQ_HANDLED;
}
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
{
struct ctlr_info *h = queue_to_hba(queue);
u32 raw_tag;
u8 q = *(u8 *) queue;
h->last_intr_timestamp = get_jiffies_64();
raw_tag = get_next_completion(h, q);
while (raw_tag != FIFO_EMPTY) {
if (likely(hpsa_tag_contains_index(raw_tag)))
process_indexed_cmd(h, raw_tag);
else
process_nonindexed_cmd(h, raw_tag);
raw_tag = next_command(h, q);
}
return IRQ_HANDLED;
}
/* 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.
*/
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
unsigned char type)
{
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);
if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
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)
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
void * __iomem vaddr, u32 use_doorbell)
{
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");
writel(use_doorbell, vaddr + SA5_DOORBELL);
} 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);
/*
* 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);
}
return 0;
}
static void init_driver_version(char *driver_version, int len)
{
memset(driver_version, 0, len);
strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
}
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
{
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;
}
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
unsigned char *driver_ver)
{
int i;
for (i = 0; i < sizeof(cfgtable->driver_version); i++)
driver_ver[i] = readb(&cfgtable->driver_version[i]);
}
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
{
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;
}
/* This does a hard reset of the controller using PCI power management
* states or the using the doorbell register.
*/
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
{
u64 cfg_offset;
u32 cfg_base_addr;
u64 cfg_base_addr_index;
void __iomem *vaddr;
unsigned long paddr;
u32 misc_fw_support;
int rc;
struct CfgTable __iomem *cfgtable;
u32 use_doorbell;
u32 board_id;
u16 command_register;
/* For controllers as old as the P600, this is very nearly
* the same thing as
*
* 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);
*
* 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.
*/
rc = hpsa_lookup_board_id(pdev, &board_id);
if (rc < 0 || !ctlr_is_resettable(board_id)) {
dev_warn(&pdev->dev, "Not resetting device.\n");
return -ENODEV;
}
/* if controller is soft- but not hard resettable... */
if (!ctlr_is_hard_resettable(board_id))
return -ENOTSUPP; /* try soft reset later. */
/* 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);
/* 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;
/* 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;
}
rc = write_driver_ver_to_cfgtable(cfgtable);
if (rc)
goto unmap_vaddr;
/* If reset via doorbell register is supported, use that.
* There are two such methods. Favor the newest method.
*/
misc_fw_support = readl(&cfgtable->misc_fw_support);
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) {
dev_warn(&pdev->dev, "Soft reset not supported. "
"Firmware update is required.\n");
rc = -ENOTSUPP; /* try soft reset */
goto unmap_cfgtable;
}
}
rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
if (rc)
goto unmap_cfgtable;
pci_restore_state(pdev);
rc = pci_enable_device(pdev);
if (rc) {
dev_warn(&pdev->dev, "failed to enable device.\n");
goto unmap_cfgtable;
}
pci_write_config_word(pdev, 4, command_register);
/* Some devices (notably the HP Smart Array 5i Controller)
need a little pause here */
msleep(HPSA_POST_RESET_PAUSE_MSECS);
/* Wait for board to become not ready, then ready. */
dev_info(&pdev->dev, "Waiting for board to reset.\n");
rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
if (rc) {
dev_warn(&pdev->dev,
"failed waiting for board to reset."
" Will try soft reset.\n");
rc = -ENOTSUPP; /* Not expected, but try soft reset later */
goto unmap_cfgtable;
}
rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
if (rc) {
dev_warn(&pdev->dev,
"failed waiting for board to become ready "
"after hard reset\n");
goto unmap_cfgtable;
}
rc = controller_reset_failed(vaddr);
if (rc < 0)
goto unmap_cfgtable;
if (rc) {
dev_warn(&pdev->dev, "Unable to successfully reset "
"controller. Will try soft reset.\n");
rc = -ENOTSUPP;
} else {
dev_info(&pdev->dev, "board ready after hard reset.\n");
}
unmap_cfgtable:
iounmap(cfgtable);
unmap_vaddr:
iounmap(vaddr);
return rc;
}
/*
* 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)
{
#ifdef HPSA_DEBUG
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 */
}
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.
*/
static void hpsa_interrupt_mode(struct ctlr_info *h)
{
#ifdef CONFIG_PCI_MSI
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;
}
/* Some boards advertise MSI but don't really support it */
if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
(h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
goto default_int_mode;
if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
dev_info(&h->pdev->dev, "MSIX\n");
err = pci_enable_msix(h->pdev, hpsa_msix_entries,
MAX_REPLY_QUEUES);
if (!err) {
for (i = 0; i < MAX_REPLY_QUEUES; i++)
h->intr[i] = hpsa_msix_entries[i].vector;
h->msix_vector = 1;
return;
}
if (err > 0) {
dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
"available\n", err);
goto default_int_mode;
} else {
dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
err);
goto default_int_mode;
}
}
if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
dev_info(&h->pdev->dev, "MSI\n");
if (!pci_enable_msi(h->pdev))
h->msi_vector = 1;
else
dev_warn(&h->pdev->dev, "MSI init failed\n");
}
default_int_mode:
#endif /* CONFIG_PCI_MSI */
/* if we get here we're going to use the default interrupt mode */
h->intr[h->intr_mode] = h->pdev->irq;
}
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
{
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;
if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
!hpsa_allow_any) {
dev_warn(&pdev->dev, "unrecognized board ID: "
"0x%08x, ignoring.\n", *board_id);
return -ENODEV;
}
return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
unsigned long *memory_bar)
{
int i;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
/* addressing mode bits already removed */
*memory_bar = pci_resource_start(pdev, i);
dev_dbg(&pdev->dev, "memory BAR = %lx\n",
*memory_bar);
return 0;
}
dev_warn(&pdev->dev, "no memory BAR found\n");
return -ENODEV;
}
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
int wait_for_ready)
{
int i, iterations;
u32 scratchpad;
if (wait_for_ready)
iterations = HPSA_BOARD_READY_ITERATIONS;
else
iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
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;
}
msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
}
dev_warn(&pdev->dev, "board not ready, timed out.\n");
return -ENODEV;
}
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)
{
*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;
}
static int hpsa_find_cfgtables(struct ctlr_info *h)
{
u64 cfg_offset;
u32 cfg_base_addr;
u64 cfg_base_addr_index;
u32 trans_offset;
int rc;
rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
&cfg_base_addr_index, &cfg_offset);
if (rc)
return rc;
h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
if (!h->cfgtable)
return -ENOMEM;
rc = write_driver_ver_to_cfgtable(h->cfgtable);
if (rc)
return rc;
/* Find performant mode table. */
trans_offset = readl(&h->cfgtable->TransMethodOffset);
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;
}
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
{
h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
/* Limit commands in memory limited kdump scenario. */
if (reset_devices && h->max_commands > 32)
h->max_commands = 32;
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;
}
}
/* Interrogate the hardware for some limits:
* max commands, max SG elements without chaining, and with chaining,
* SG chain block size, etc.
*/
static void hpsa_find_board_params(struct ctlr_info *h)
{
hpsa_get_max_perf_mode_cmds(h);
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;
}
/* Find out what task management functions are supported and cache */
h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
}
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
return false;
}
return true;
}
/* 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
}
/* 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);
}
static void hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
{
int i;
u32 doorbell_value;
unsigned long flags;
/* 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++) {
spin_lock_irqsave(&h->lock, flags);
doorbell_value = readl(h->vaddr + SA5_DOORBELL);
spin_unlock_irqrestore(&h->lock, flags);
if (!(doorbell_value & CFGTBL_ChangeReq))
break;
/* delay and try again */
usleep_range(10000, 20000);
}
}
static int hpsa_enter_simple_mode(struct ctlr_info *h)
{
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);
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;
}
h->transMethod = CFGTBL_Trans_Simple;
return 0;
}
static int hpsa_pci_init(struct ctlr_info *h)
{
int prod_index, err;
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);
pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
err = pci_enable_device(h->pdev);
if (err) {
dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
return err;
}
/* Enable bus mastering (pci_disable_device may disable this) */
pci_set_master(h->pdev);
err = pci_request_regions(h->pdev, HPSA);
if (err) {
dev_err(&h->pdev->dev,
"cannot obtain PCI resources, aborting\n");
return err;
}
hpsa_interrupt_mode(h);
err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
if (err)
goto err_out_free_res;
h->vaddr = remap_pci_mem(h->paddr, 0x250);
if (!h->vaddr) {
err = -ENOMEM;
goto err_out_free_res;
}
err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
if (err)
goto err_out_free_res;
err = hpsa_find_cfgtables(h);
if (err)
goto err_out_free_res;
hpsa_find_board_params(h);
if (!hpsa_CISS_signature_present(h)) {
err = -ENODEV;
goto err_out_free_res;
}
hpsa_enable_scsi_prefetch(h);
hpsa_p600_dma_prefetch_quirk(h);
err = hpsa_enter_simple_mode(h);
if (err)
goto err_out_free_res;
return 0;
err_out_free_res:
if (h->transtable)
iounmap(h->transtable);
if (h->cfgtable)
iounmap(h->cfgtable);
if (h->vaddr)
iounmap(h->vaddr);
pci_disable_device(h->pdev);
pci_release_regions(h->pdev);
return err;
}
static void hpsa_hba_inquiry(struct ctlr_info *h)
{
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;
}
}
static int hpsa_init_reset_devices(struct pci_dev *pdev)
{
int rc, i;
if (!reset_devices)
return 0;
/* Reset the controller with a PCI power-cycle or via doorbell */
rc = hpsa_kdump_hard_reset_controller(pdev);
/* -ENOTSUPP here means we cannot reset the controller
* but it's already (and still) up and running in
* "performant mode". Or, it might be 640x, which can't reset
* due to concerns about shared bbwc between 6402/6404 pair.
*/
if (rc == -ENOTSUPP)
return rc; /* just try to do the kdump anyhow. */
if (rc)
return -ENODEV;
/* Now try to get the controller to respond to a no-op */
dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
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;
}
static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
{
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);
}
static int hpsa_request_irq(struct ctlr_info *h,
irqreturn_t (*msixhandler)(int, void *),
irqreturn_t (*intxhandler)(int, void *))
{
int rc, i;
/*
* 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]);
}
}
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;
}
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
{
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;
}
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]);
}
static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)
{
free_irqs(h);
#ifdef CONFIG_PCI_MSI
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);
}
#endif /* CONFIG_PCI_MSI */
}
static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
hpsa_free_irqs_and_disable_msix(h);
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);
}
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;
finish_cmd(c);
}
}
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 +
(h->heartbeat_sample_interval), now))
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 +
(h->heartbeat_sample_interval), now))
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;
h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
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,
NULL, HPSA);
}
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)) {
spin_unlock_irqrestore(&lockup_detector_lock, flags);
kthread_stop(hpsa_lockup_detector);
spin_lock_irqsave(&lockup_detector_lock, flags);
hpsa_lockup_detector = NULL;
}
spin_unlock_irqrestore(&lockup_detector_lock, flags);
}
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int dac, rc;
struct ctlr_info *h;
int try_soft_reset = 0;
unsigned long flags;
if (number_of_controllers == 0)
printk(KERN_INFO DRIVER_NAME "\n");
rc = hpsa_init_reset_devices(pdev);
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:
/* 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);
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return -ENOMEM;
h->pdev = pdev;
h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
INIT_LIST_HEAD(&h->cmpQ);
INIT_LIST_HEAD(&h->reqQ);
spin_lock_init(&h->lock);
spin_lock_init(&h->scan_lock);
rc = hpsa_pci_init(h);
if (rc != 0)
goto clean1;
sprintf(h->devname, HPSA "%d", number_of_controllers);
h->ctlr = number_of_controllers;
number_of_controllers++;
/* configure PCI DMA stuff */
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (rc == 0) {
dac = 1;
} 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;
}
}
/* make sure the board interrupts are off */
h->access.set_intr_mask(h, HPSA_INTR_OFF);
if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
goto clean2;
dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
h->devname, pdev->device,
h->intr[h->intr_mode], dac ? "" : " not");
if (hpsa_allocate_cmd_pool(h))
goto clean4;
if (hpsa_allocate_sg_chain_blocks(h))
goto clean4;
init_waitqueue_head(&h->scan_wait_queue);
h->scan_finished = 1; /* no scan currently in progress */
pci_set_drvdata(pdev, h);
h->ndevices = 0;
h->scsi_host = NULL;
spin_lock_init(&h->devlock);
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);
free_irqs(h);
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;
}
/* Turn the interrupts on so we can service requests */
h->access.set_intr_mask(h, HPSA_INTR_ON);
hpsa_hba_inquiry(h);
hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
start_controller_lockup_detector(h);
return 1;
clean4:
hpsa_free_sg_chain_blocks(h);
hpsa_free_cmd_pool(h);
free_irqs(h);
clean2:
clean1:
kfree(h);
return rc;
}
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;
}
if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
RAID_CTLR_LUNID, TYPE_CMD)) {
goto out;
}
hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
if (c->err_info->CommandStatus != 0)
out:
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);
hpsa_free_irqs_and_disable_msix(h);
}
static void hpsa_free_device_info(struct ctlr_info *h)
{
int i;
for (i = 0; i < h->ndevices; i++)
kfree(h->dev[i]);
}
static void hpsa_remove_one(struct pci_dev *pdev)
{
struct ctlr_info *h;
if (pci_get_drvdata(pdev) == NULL) {
dev_err(&pdev->dev, "unable to remove device\n");
return;
}
h = pci_get_drvdata(pdev);
stop_controller_lockup_detector(h);
hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
hpsa_shutdown(pdev);
iounmap(h->vaddr);
iounmap(h->transtable);
iounmap(h->cfgtable);
hpsa_free_device_info(h);
hpsa_free_sg_chain_blocks(h);
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);
pci_free_consistent(h->pdev, h->reply_pool_size,
h->reply_pool, h->reply_pool_dhandle);
kfree(h->cmd_pool_bits);
kfree(h->blockFetchTable);
kfree(h->hba_inquiry_data);
pci_disable_device(pdev);
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 = {
.name = HPSA,
.probe = hpsa_init_one,
.remove = hpsa_remove_one,
.id_table = hpsa_pci_device_id, /* id_table */
.shutdown = hpsa_shutdown,
.suspend = hpsa_suspend,
.resume = hpsa_resume,
};
/* 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;
}
}
static void hpsa_enter_performant_mode(struct ctlr_info *h, u32 use_short_tags)
{
int i;
unsigned long register_value;
/* 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.
* the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
* 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.
*/
int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
/* 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);
bft[7] = SG_ENTRIES_IN_CMD + 4;
calc_bucket_map(bft, ARRAY_SIZE(bft),
SG_ENTRIES_IN_CMD, h->blockFetchTable);
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);
writel(h->nreply_queues, &h->transtable->RepQCount);
writel(0, &h->transtable->RepQCtrAddrLow32);
writel(0, &h->transtable->RepQCtrAddrHigh32);
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,
&(h->cfgtable->HostWrite.TransportRequest));
writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
hpsa_wait_for_mode_change_ack(h);
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;
}
/* Change the access methods to the performant access methods */
h->access = SA5_performant_access;
h->transMethod = CFGTBL_Trans_Performant;
}
static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
{
u32 trans_support;
int i;
if (hpsa_simple_mode)
return;
trans_support = readl(&(h->cfgtable->TransportSupport));
if (!(trans_support & PERFORMANT_MODE))
return;
h->nreply_queues = h->msix_vector ? MAX_REPLY_QUEUES : 1;
hpsa_get_max_perf_mode_cmds(h);
/* Performant mode ring buffer and supporting data structures */
h->reply_pool_size = h->max_commands * sizeof(u64) * h->nreply_queues;
h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
&(h->reply_pool_dhandle));
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;
}
/* Need a block fetch table for performant mode */
h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
sizeof(u32)), GFP_KERNEL);
if ((h->reply_pool == NULL)
|| (h->blockFetchTable == NULL))
goto clean_up;
hpsa_enter_performant_mode(h,
trans_support & CFGTBL_Trans_use_short_tags);
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);
}
/*
* 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)
{
return pci_register_driver(&hpsa_pci_driver);
}
static void __exit hpsa_cleanup(void)
{
pci_unregister_driver(&hpsa_pci_driver);
}
module_init(hpsa_init);
module_exit(hpsa_cleanup);