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gfiber / kernel / bruno / fdb17ddd0a499eaf08261dcedb0aee496297526a / . / drivers / scsi / hpsa.c
blob: e9ce74afd13f4672e941d620f16ab602c647d33e [file] [log] [blame]
/*
* Disk Array driver for HP Smart Array SAS controllers
* Copyright 2014-2015 PMC-Sierra, Inc.
* Copyright 2000,2009-2015 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.
*
* Questions/Comments/Bugfixes to storagedev@pmcs.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/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 <scsi/scsi_eh.h>
#include <scsi/scsi_transport_sas.h>
#include <scsi/scsi_dbg.h>
#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
#include <linux/atomic.h>
#include <linux/jiffies.h>
#include <linux/percpu-defs.h>
#include <linux/percpu.h>
#include <asm/unaligned.h>
#include <asm/div64.h>
#include "hpsa_cmd.h"
#include "hpsa.h"
/*
* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
* with an optional trailing '-' followed by a byte value (0-255).
*/
#define HPSA_DRIVER_VERSION "3.4.14-0"
#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
#define HPSA "hpsa"
/* How long to wait for CISS doorbell communication */
#define CLEAR_EVENT_WAIT_INTERVAL 20 /* ms for each msleep() call */
#define MODE_CHANGE_WAIT_INTERVAL 10 /* ms for each msleep() call */
#define MAX_CLEAR_EVENT_WAIT 30000 /* times 20 ms = 600 s */
#define MAX_MODE_CHANGE_WAIT 2000 /* times 10 ms = 20 s */
#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, 0x1921},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1922},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1923},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1924},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1926},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1928},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1929},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21BD},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21BE},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21BF},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C0},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C1},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C2},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C3},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C4},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C5},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C6},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C7},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C8},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21C9},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21CA},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21CB},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21CC},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21CD},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSI, 0x103C, 0x21CE},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
{PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
{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},
{0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
{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},
{0x1921103C, "Smart Array P830i", &SA5_access},
{0x1922103C, "Smart Array P430", &SA5_access},
{0x1923103C, "Smart Array P431", &SA5_access},
{0x1924103C, "Smart Array P830", &SA5_access},
{0x1926103C, "Smart Array P731m", &SA5_access},
{0x1928103C, "Smart Array P230i", &SA5_access},
{0x1929103C, "Smart Array P530", &SA5_access},
{0x21BD103C, "Smart Array P244br", &SA5_access},
{0x21BE103C, "Smart Array P741m", &SA5_access},
{0x21BF103C, "Smart HBA H240ar", &SA5_access},
{0x21C0103C, "Smart Array P440ar", &SA5_access},
{0x21C1103C, "Smart Array P840ar", &SA5_access},
{0x21C2103C, "Smart Array P440", &SA5_access},
{0x21C3103C, "Smart Array P441", &SA5_access},
{0x21C4103C, "Smart Array", &SA5_access},
{0x21C5103C, "Smart Array P841", &SA5_access},
{0x21C6103C, "Smart HBA H244br", &SA5_access},
{0x21C7103C, "Smart HBA H240", &SA5_access},
{0x21C8103C, "Smart HBA H241", &SA5_access},
{0x21C9103C, "Smart Array", &SA5_access},
{0x21CA103C, "Smart Array P246br", &SA5_access},
{0x21CB103C, "Smart Array P840", &SA5_access},
{0x21CC103C, "Smart Array", &SA5_access},
{0x21CD103C, "Smart Array", &SA5_access},
{0x21CE103C, "Smart HBA", &SA5_access},
{0x05809005, "SmartHBA-SA", &SA5_access},
{0x05819005, "SmartHBA-SA 8i", &SA5_access},
{0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
{0x05839005, "SmartHBA-SA 8e", &SA5_access},
{0x05849005, "SmartHBA-SA 16i", &SA5_access},
{0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
{0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
{0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
{0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
{0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
{0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};
static struct scsi_transport_template *hpsa_sas_transport_template;
static int hpsa_add_sas_host(struct ctlr_info *h);
static void hpsa_delete_sas_host(struct ctlr_info *h);
static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
struct hpsa_scsi_dev_t *device);
static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
static struct hpsa_scsi_dev_t
*hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
struct sas_rphy *rphy);
#define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
static const struct scsi_cmnd hpsa_cmd_busy;
#define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
static const struct scsi_cmnd hpsa_cmd_idle;
static int number_of_controllers;
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 __user *arg);
#ifdef CONFIG_COMPAT
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
void __user *arg);
#endif
static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
struct scsi_cmnd *scmd);
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
int cmd_type);
static void hpsa_free_cmd_pool(struct ctlr_info *h);
#define VPD_PAGE (1 << 8)
#define HPSA_SIMPLE_ERROR_BITS 0x03
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);
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 int hpsa_slave_configure(struct scsi_device *sdev);
static void hpsa_slave_destroy(struct scsi_device *sdev);
static void hpsa_update_scsi_devices(struct ctlr_info *h);
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 min_blocks, u32 *bucket_map);
static void hpsa_free_performant_mode(struct ctlr_info *h);
static int 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);
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
#define BOARD_NOT_READY 0
#define BOARD_READY 1
static void hpsa_drain_accel_commands(struct ctlr_info *h);
static void hpsa_flush_cache(struct ctlr_info *h);
static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
static void hpsa_command_resubmit_worker(struct work_struct *work);
static u32 lockup_detected(struct ctlr_info *h);
static int detect_controller_lockup(struct ctlr_info *h);
static void hpsa_disable_rld_caching(struct ctlr_info *h);
static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
struct ReportExtendedLUNdata *buf, int bufsize);
static int hpsa_luns_changed(struct ctlr_info *h);
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 inline bool hpsa_is_cmd_idle(struct CommandList *c)
{
return c->scsi_cmd == SCSI_CMD_IDLE;
}
static inline bool hpsa_is_pending_event(struct CommandList *c)
{
return c->abort_pending || c->reset_pending;
}
/* extract sense key, asc, and ascq from sense data. -1 means invalid. */
static void decode_sense_data(const u8 *sense_data, int sense_data_len,
u8 *sense_key, u8 *asc, u8 *ascq)
{
struct scsi_sense_hdr sshdr;
bool rc;
*sense_key = -1;
*asc = -1;
*ascq = -1;
if (sense_data_len < 1)
return;
rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
if (rc) {
*sense_key = sshdr.sense_key;
*asc = sshdr.asc;
*ascq = sshdr.ascq;
}
}
static int check_for_unit_attention(struct ctlr_info *h,
struct CommandList *c)
{
u8 sense_key, asc, ascq;
int sense_len;
if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
sense_len = sizeof(c->err_info->SenseInfo);
else
sense_len = c->err_info->SenseLen;
decode_sense_data(c->err_info->SenseInfo, sense_len,
&sense_key, &asc, &ascq);
if (sense_key != UNIT_ATTENTION || asc == 0xff)
return 0;
switch (asc) {
case STATE_CHANGED:
dev_warn(&h->pdev->dev,
"%s: a state change detected, command retried\n",
h->devname);
break;
case LUN_FAILED:
dev_warn(&h->pdev->dev,
"%s: LUN failure detected\n", h->devname);
break;
case REPORT_LUNS_CHANGED:
dev_warn(&h->pdev->dev,
"%s: report LUN data changed\n", h->devname);
/*
* Note: this REPORT_LUNS_CHANGED condition only occurs on the external
* target (array) devices.
*/
break;
case POWER_OR_RESET:
dev_warn(&h->pdev->dev,
"%s: a power on or device reset detected\n",
h->devname);
break;
case UNIT_ATTENTION_CLEARED:
dev_warn(&h->pdev->dev,
"%s: unit attention cleared by another initiator\n",
h->devname);
break;
default:
dev_warn(&h->pdev->dev,
"%s: unknown unit attention detected\n",
h->devname);
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 u32 lockup_detected(struct ctlr_info *h);
static ssize_t host_show_lockup_detected(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ld;
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
h = shost_to_hba(shost);
ld = lockup_detected(h);
return sprintf(buf, "ld=%d\n", ld);
}
static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int status, len;
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
char tmpbuf[10];
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
strncpy(tmpbuf, buf, len);
tmpbuf[len] = '\0';
if (sscanf(tmpbuf, "%d", &status) != 1)
return -EINVAL;
h = shost_to_hba(shost);
h->acciopath_status = !!status;
dev_warn(&h->pdev->dev,
"hpsa: HP SSD Smart Path %s via sysfs update.\n",
h->acciopath_status ? "enabled" : "disabled");
return count;
}
static ssize_t host_store_raid_offload_debug(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int debug_level, len;
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
char tmpbuf[10];
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
strncpy(tmpbuf, buf, len);
tmpbuf[len] = '\0';
if (sscanf(tmpbuf, "%d", &debug_level) != 1)
return -EINVAL;
if (debug_level < 0)
debug_level = 0;
h = shost_to_hba(shost);
h->raid_offload_debug = debug_level;
dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
h->raid_offload_debug);
return count;
}
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",
atomic_read(&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");
}
static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
h = shost_to_hba(shost);
return snprintf(buf, 30, "HP SSD Smart Path %s\n",
(h->acciopath_status == 1) ? "enabled" : "disabled");
}
/* List of controllers which cannot be hard reset on kexec with reset_devices */
static u32 unresettable_controller[] = {
0x324a103C, /* Smart Array P712m */
0x324b103C, /* Smart Array 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 u32 needs_abort_tags_swizzled[] = {
0x323D103C, /* Smart Array P700m */
0x324a103C, /* Smart Array P712m */
0x324b103C, /* SmartArray P711m */
};
static int board_id_in_array(u32 a[], int nelems, u32 board_id)
{
int i;
for (i = 0; i < nelems; i++)
if (a[i] == board_id)
return 1;
return 0;
}
static int ctlr_is_hard_resettable(u32 board_id)
{
return !board_id_in_array(unresettable_controller,
ARRAY_SIZE(unresettable_controller), board_id);
}
static int ctlr_is_soft_resettable(u32 board_id)
{
return !board_id_in_array(soft_unresettable_controller,
ARRAY_SIZE(soft_unresettable_controller), board_id);
}
static int ctlr_is_resettable(u32 board_id)
{
return ctlr_is_hard_resettable(board_id) ||
ctlr_is_soft_resettable(board_id);
}
static int ctlr_needs_abort_tags_swizzled(u32 board_id)
{
return board_id_in_array(needs_abort_tags_swizzled,
ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
}
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 * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
"1(+0)ADM", "UNKNOWN", "PHYS DRV"
};
#define HPSA_RAID_0 0
#define HPSA_RAID_4 1
#define HPSA_RAID_1 2 /* also used for RAID 10 */
#define HPSA_RAID_5 3 /* also used for RAID 50 */
#define HPSA_RAID_51 4
#define HPSA_RAID_6 5 /* also used for RAID 60 */
#define HPSA_RAID_ADM 6 /* also used for RAID 1+0 ADM */
#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
#define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
{
return !device->physical_device;
}
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_device(hdev)) {
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 ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ctlr_info *h;
struct scsi_device *sdev;
struct hpsa_scsi_dev_t *hdev;
unsigned long flags;
int offload_enabled;
sdev = to_scsi_device(dev);
h = sdev_to_hba(sdev);
spin_lock_irqsave(&h->lock, flags);
hdev = sdev->hostdata;
if (!hdev) {
spin_unlock_irqrestore(&h->lock, flags);
return -ENODEV;
}
offload_enabled = hdev->offload_enabled;
spin_unlock_irqrestore(&h->lock, flags);
return snprintf(buf, 20, "%d\n", offload_enabled);
}
#define MAX_PATHS 8
static ssize_t path_info_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ctlr_info *h;
struct scsi_device *sdev;
struct hpsa_scsi_dev_t *hdev;
unsigned long flags;
int i;
int output_len = 0;
u8 box;
u8 bay;
u8 path_map_index = 0;
char *active;
unsigned char phys_connector[2];
sdev = to_scsi_device(dev);
h = sdev_to_hba(sdev);
spin_lock_irqsave(&h->devlock, flags);
hdev = sdev->hostdata;
if (!hdev) {
spin_unlock_irqrestore(&h->devlock, flags);
return -ENODEV;
}
bay = hdev->bay;
for (i = 0; i < MAX_PATHS; i++) {
path_map_index = 1<<i;
if (i == hdev->active_path_index)
active = "Active";
else if (hdev->path_map & path_map_index)
active = "Inactive";
else
continue;
output_len += scnprintf(buf + output_len,
PAGE_SIZE - output_len,
"[%d:%d:%d:%d] %20.20s ",
h->scsi_host->host_no,
hdev->bus, hdev->target, hdev->lun,
scsi_device_type(hdev->devtype));
if (hdev->external ||
hdev->devtype == TYPE_RAID ||
is_logical_device(hdev)) {
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len,
"%s\n", active);
continue;
}
box = hdev->box[i];
memcpy(&phys_connector, &hdev->phys_connector[i],
sizeof(phys_connector));
if (phys_connector[0] < '0')
phys_connector[0] = '0';
if (phys_connector[1] < '0')
phys_connector[1] = '0';
if (hdev->phys_connector[i] > 0)
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len,
"PORT: %.2s ",
phys_connector);
if (hdev->devtype == TYPE_DISK && hdev->expose_device) {
if (box == 0 || box == 0xFF) {
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len,
"BAY: %hhu %s\n",
bay, active);
} else {
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len,
"BOX: %hhu BAY: %hhu %s\n",
box, bay, active);
}
} else if (box != 0 && box != 0xFF) {
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len, "BOX: %hhu %s\n",
box, active);
} else
output_len += snprintf(buf + output_len,
PAGE_SIZE - output_len, "%s\n", active);
}
spin_unlock_irqrestore(&h->devlock, flags);
return output_len;
}
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(hp_ssd_smart_path_enabled, S_IRUGO,
host_show_hp_ssd_smart_path_enabled, NULL);
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
host_show_hp_ssd_smart_path_status,
host_store_hp_ssd_smart_path_status);
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
host_store_raid_offload_debug);
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 DEVICE_ATTR(lockup_detected, S_IRUGO,
host_show_lockup_detected, NULL);
static struct device_attribute *hpsa_sdev_attrs[] = {
&dev_attr_raid_level,
&dev_attr_lunid,
&dev_attr_unique_id,
&dev_attr_hp_ssd_smart_path_enabled,
&dev_attr_path_info,
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,
&dev_attr_hp_ssd_smart_path_status,
&dev_attr_raid_offload_debug,
&dev_attr_lockup_detected,
NULL,
};
#define HPSA_NRESERVED_CMDS (HPSA_CMDS_RESERVED_FOR_ABORTS + \
HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)
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_configure = hpsa_slave_configure,
.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,
.no_write_same = 1,
};
static inline u32 next_command(struct ctlr_info *h, u8 q)
{
u32 a;
struct reply_queue_buffer *rq = &h->reply_queue[q];
if (h->transMethod & CFGTBL_Trans_io_accel1)
return h->access.command_completed(h, q);
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++;
atomic_dec(&h->commands_outstanding);
} else {
a = FIFO_EMPTY;
}
/* Check for wraparound */
if (rq->current_entry == h->max_commands) {
rq->current_entry = 0;
rq->wraparound ^= 1;
}
return a;
}
/*
* There are some special bits in the bus address of the
* command that we have to set for the controller to know
* how to process the command:
*
* Normal performant mode:
* bit 0: 1 means performant mode, 0 means simple mode.
* bits 1-3 = block fetch table entry
* bits 4-6 = command type (== 0)
*
* ioaccel1 mode:
* bit 0 = "performant mode" bit.
* bits 1-3 = block fetch table entry
* bits 4-6 = command type (== 110)
* (command type is needed because ioaccel1 mode
* commands are submitted through the same register as normal
* mode commands, so this is how the controller knows whether
* the command is normal mode or ioaccel1 mode.)
*
* ioaccel2 mode:
* bit 0 = "performant mode" bit.
* bits 1-4 = block fetch table entry (note extra bit)
* bits 4-6 = not needed, because ioaccel2 mode has
* a separate special register for submitting commands.
*/
/*
* set_performant_mode: Modify the tag for cciss performant
* set bit 0 for pull model, bits 3-1 for block fetch
* register number
*/
#define DEFAULT_REPLY_QUEUE (-1)
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
int reply_queue)
{
if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
if (unlikely(!h->msix_vector))
return;
if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
c->Header.ReplyQueue =
raw_smp_processor_id() % h->nreply_queues;
else
c->Header.ReplyQueue = reply_queue % h->nreply_queues;
}
}
static void set_ioaccel1_performant_mode(struct ctlr_info *h,
struct CommandList *c,
int reply_queue)
{
struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
/*
* Tell the controller to post the reply to the queue for this
* processor. This seems to give the best I/O throughput.
*/
if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
else
cp->ReplyQueue = reply_queue % h->nreply_queues;
/*
* Set the bits in the address sent down to include:
* - performant mode bit (bit 0)
* - pull count (bits 1-3)
* - command type (bits 4-6)
*/
c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
IOACCEL1_BUSADDR_CMDTYPE;
}
static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
struct CommandList *c,
int reply_queue)
{
struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
&h->ioaccel2_cmd_pool[c->cmdindex];
/* Tell the controller to post the reply to the queue for this
* processor. This seems to give the best I/O throughput.
*/
if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
cp->reply_queue = smp_processor_id() % h->nreply_queues;
else
cp->reply_queue = reply_queue % h->nreply_queues;
/* Set the bits in the address sent down to include:
* - performant mode bit not used in ioaccel mode 2
* - pull count (bits 0-3)
* - command type isn't needed for ioaccel2
*/
c->busaddr |= h->ioaccel2_blockFetchTable[0];
}
static void set_ioaccel2_performant_mode(struct ctlr_info *h,
struct CommandList *c,
int reply_queue)
{
struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
/*
* Tell the controller to post the reply to the queue for this
* processor. This seems to give the best I/O throughput.
*/
if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
cp->reply_queue = smp_processor_id() % h->nreply_queues;
else
cp->reply_queue = reply_queue % h->nreply_queues;
/*
* Set the bits in the address sent down to include:
* - performant mode bit not used in ioaccel mode 2
* - pull count (bits 0-3)
* - command type isn't needed for ioaccel2
*/
c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
}
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, int reply_queue)
{
dial_down_lockup_detection_during_fw_flash(h, c);
atomic_inc(&h->commands_outstanding);
switch (c->cmd_type) {
case CMD_IOACCEL1:
set_ioaccel1_performant_mode(h, c, reply_queue);
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
break;
case CMD_IOACCEL2:
set_ioaccel2_performant_mode(h, c, reply_queue);
writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
break;
case IOACCEL2_TMF:
set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
break;
default:
set_performant_mode(h, c, reply_queue);
h->access.submit_command(h, c);
}
}
static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
{
if (unlikely(hpsa_is_pending_event(c)))
return finish_cmd(c);
__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}
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;
}
static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
struct hpsa_scsi_dev_t *dev, char *description)
{
#define LABEL_SIZE 25
char label[LABEL_SIZE];
if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
return;
switch (dev->devtype) {
case TYPE_RAID:
snprintf(label, LABEL_SIZE, "controller");
break;
case TYPE_ENCLOSURE:
snprintf(label, LABEL_SIZE, "enclosure");
break;
case TYPE_DISK:
if (dev->external)
snprintf(label, LABEL_SIZE, "external");
else if (!is_logical_dev_addr_mode(dev->scsi3addr))
snprintf(label, LABEL_SIZE, "%s",
raid_label[PHYSICAL_DRIVE]);
else
snprintf(label, LABEL_SIZE, "RAID-%s",
dev->raid_level > RAID_UNKNOWN ? "?" :
raid_label[dev->raid_level]);
break;
case TYPE_ROM:
snprintf(label, LABEL_SIZE, "rom");
break;
case TYPE_TAPE:
snprintf(label, LABEL_SIZE, "tape");
break;
case TYPE_MEDIUM_CHANGER:
snprintf(label, LABEL_SIZE, "changer");
break;
default:
snprintf(label, LABEL_SIZE, "UNKNOWN");
break;
}
dev_printk(level, &h->pdev->dev,
"scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
description,
scsi_device_type(dev->devtype),
dev->vendor,
dev->model,
label,
dev->offload_config ? '+' : '-',
dev->offload_enabled ? '+' : '-',
dev->expose_device);
}
/* Add an entry into h->dev[] array. */
static int hpsa_scsi_add_entry(struct ctlr_info *h,
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 otherwise.
*/
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 and 5.
* 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;
addr1[5] = 0;
for (i = 0; i < n; i++) {
sd = h->dev[i];
memcpy(addr2, sd->scsi3addr, 8);
addr2[4] = 0;
addr2[5] = 0;
/* differ only in byte 4 and 5? */
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)++;
hpsa_show_dev_msg(KERN_INFO, h, device,
device->expose_device ? "added" : "masked");
device->offload_to_be_enabled = device->offload_enabled;
device->offload_enabled = 0;
return 0;
}
/* Update an entry in h->dev[] array. */
static void hpsa_scsi_update_entry(struct ctlr_info *h,
int entry, struct hpsa_scsi_dev_t *new_entry)
{
int offload_enabled;
/* 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;
/* Raid offload parameters changed. Careful about the ordering. */
if (new_entry->offload_config && new_entry->offload_enabled) {
/*
* if drive is newly offload_enabled, we want to copy the
* raid map data first. If previously offload_enabled and
* offload_config were set, raid map data had better be
* the same as it was before. if raid map data is changed
* then it had better be the case that
* h->dev[entry]->offload_enabled is currently 0.
*/
h->dev[entry]->raid_map = new_entry->raid_map;
h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
}
if (new_entry->hba_ioaccel_enabled) {
h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
}
h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
h->dev[entry]->offload_config = new_entry->offload_config;
h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
h->dev[entry]->queue_depth = new_entry->queue_depth;
/*
* We can turn off ioaccel offload now, but need to delay turning
* it on until we can update h->dev[entry]->phys_disk[], but we
* can't do that until all the devices are updated.
*/
h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
if (!new_entry->offload_enabled)
h->dev[entry]->offload_enabled = 0;
offload_enabled = h->dev[entry]->offload_enabled;
h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
h->dev[entry]->offload_enabled = offload_enabled;
}
/* Replace an entry from h->dev[] array. */
static void hpsa_scsi_replace_entry(struct ctlr_info *h,
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)++;
hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
new_entry->offload_to_be_enabled = new_entry->offload_enabled;
new_entry->offload_enabled = 0;
}
/* Remove an entry from h->dev[] array. */
static void hpsa_scsi_remove_entry(struct ctlr_info *h, 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--;
hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
}
#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;
if (dev1->offload_config != dev2->offload_config)
return 1;
if (dev1->offload_enabled != dev2->offload_enabled)
return 1;
if (!is_logical_dev_addr_mode(dev1->scsi3addr))
if (dev1->queue_depth != dev2->queue_depth)
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
if (needle == NULL)
return DEVICE_NOT_FOUND;
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 {
/* Keep offline devices offline */
if (needle->volume_offline)
return DEVICE_NOT_FOUND;
return DEVICE_CHANGED;
}
}
}
*index = -1;
return DEVICE_NOT_FOUND;
}
static void hpsa_monitor_offline_device(struct ctlr_info *h,
unsigned char scsi3addr[])
{
struct offline_device_entry *device;
unsigned long flags;
/* Check to see if device is already on the list */
spin_lock_irqsave(&h->offline_device_lock, flags);
list_for_each_entry(device, &h->offline_device_list, offline_list) {
if (memcmp(device->scsi3addr, scsi3addr,
sizeof(device->scsi3addr)) == 0) {
spin_unlock_irqrestore(&h->offline_device_lock, flags);
return;
}
}
spin_unlock_irqrestore(&h->offline_device_lock, flags);
/* Device is not on the list, add it. */
device = kmalloc(sizeof(*device), GFP_KERNEL);
if (!device) {
dev_warn(&h->pdev->dev, "out of memory in %s\n", __func__);
return;
}
memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
spin_lock_irqsave(&h->offline_device_lock, flags);
list_add_tail(&device->offline_list, &h->offline_device_list);
spin_unlock_irqrestore(&h->offline_device_lock, flags);
}
/* Print a message explaining various offline volume states */
static void hpsa_show_volume_status(struct ctlr_info *h,
struct hpsa_scsi_dev_t *sd)
{
if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
switch (sd->volume_offline) {
case HPSA_LV_OK:
break;
case HPSA_LV_UNDERGOING_ERASE:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_NOT_AVAILABLE:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_UNDERGOING_RPI:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_PENDING_RPI:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_ENCRYPTED_NO_KEY:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_UNDERGOING_ENCRYPTION:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_PENDING_ENCRYPTION:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
dev_info(&h->pdev->dev,
"C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
h->scsi_host->host_no,
sd->bus, sd->target, sd->lun);
break;
}
}
/*
* Figure the list of physical drive pointers for a logical drive with
* raid offload configured.
*/
static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
struct hpsa_scsi_dev_t *dev[], int ndevices,
struct hpsa_scsi_dev_t *logical_drive)
{
struct raid_map_data *map = &logical_drive->raid_map;
struct raid_map_disk_data *dd = &map->data[0];
int i, j;
int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
le16_to_cpu(map->metadata_disks_per_row);
int nraid_map_entries = le16_to_cpu(map->row_cnt) *
le16_to_cpu(map->layout_map_count) *
total_disks_per_row;
int nphys_disk = le16_to_cpu(map->layout_map_count) *
total_disks_per_row;
int qdepth;
if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
nraid_map_entries = RAID_MAP_MAX_ENTRIES;
logical_drive->nphysical_disks = nraid_map_entries;
qdepth = 0;
for (i = 0; i < nraid_map_entries; i++) {
logical_drive->phys_disk[i] = NULL;
if (!logical_drive->offload_config)
continue;
for (j = 0; j < ndevices; j++) {
if (dev[j] == NULL)
continue;
if (dev[j]->devtype != TYPE_DISK)
continue;
if (is_logical_device(dev[j]))
continue;
if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
continue;
logical_drive->phys_disk[i] = dev[j];
if (i < nphys_disk)
qdepth = min(h->nr_cmds, qdepth +
logical_drive->phys_disk[i]->queue_depth);
break;
}
/*
* This can happen if a physical drive is removed and
* the logical drive is degraded. In that case, the RAID
* map data will refer to a physical disk which isn't actually
* present. And in that case offload_enabled should already
* be 0, but we'll turn it off here just in case
*/
if (!logical_drive->phys_disk[i]) {
logical_drive->offload_enabled = 0;
logical_drive->offload_to_be_enabled = 0;
logical_drive->queue_depth = 8;
}
}
if (nraid_map_entries)
/*
* This is correct for reads, too high for full stripe writes,
* way too high for partial stripe writes
*/
logical_drive->queue_depth = qdepth;
else
logical_drive->queue_depth = h->nr_cmds;
}
static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
struct hpsa_scsi_dev_t *dev[], int ndevices)
{
int i;
for (i = 0; i < ndevices; i++) {
if (dev[i] == NULL)
continue;
if (dev[i]->devtype != TYPE_DISK)
continue;
if (!is_logical_device(dev[i]))
continue;
/*
* If offload is currently enabled, the RAID map and
* phys_disk[] assignment *better* not be changing
* and since it isn't changing, we do not need to
* update it.
*/
if (dev[i]->offload_enabled)
continue;
hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
}
}
static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
int rc = 0;
if (!h->scsi_host)
return 1;
if (is_logical_device(device)) /* RAID */
rc = scsi_add_device(h->scsi_host, device->bus,
device->target, device->lun);
else /* HBA */
rc = hpsa_add_sas_device(h->sas_host, device);
return rc;
}
static void hpsa_remove_device(struct ctlr_info *h,
struct hpsa_scsi_dev_t *device)
{
struct scsi_device *sdev = NULL;
if (!h->scsi_host)
return;
if (is_logical_device(device)) { /* RAID */
sdev = scsi_device_lookup(h->scsi_host, device->bus,
device->target, device->lun);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
} else {
/*
* We don't expect to get here. Future commands
* to this device will get a selection timeout as
* if the device were gone.
*/
hpsa_show_dev_msg(KERN_WARNING, h, device,
"didn't find device for removal.");
}
} else /* HBA */
hpsa_remove_sas_device(device);
}
static void adjust_hpsa_scsi_table(struct ctlr_info *h,
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;
/*
* A reset can cause a device status to change
* re-schedule the scan to see what happened.
*/
if (h->reset_in_progress) {
h->drv_req_rescan = 1;
return;
}
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, i, removed, &nremoved);
continue; /* remove ^^^, hence i not incremented */
} else if (device_change == DEVICE_CHANGED) {
changes++;
hpsa_scsi_replace_entry(h, 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, 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;
/* Don't add devices which are NOT READY, FORMAT IN PROGRESS
* as the SCSI mid-layer does not handle such devices well.
* It relentlessly loops sending TUR at 3Hz, then READ(10)
* at 160Hz, and prevents the system from coming up.
*/
if (sd[i]->volume_offline) {
hpsa_show_volume_status(h, sd[i]);
hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
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, 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 */
}
}
hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);
/* Now that h->dev[]->phys_disk[] is coherent, we can enable
* any logical drives that need it enabled.
*/
for (i = 0; i < h->ndevices; i++) {
if (h->dev[i] == NULL)
continue;
h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
}
spin_unlock_irqrestore(&h->devlock, flags);
/* Monitor devices which are in one of several NOT READY states to be
* brought online later. This must be done without holding h->devlock,
* so don't touch h->dev[]
*/
for (i = 0; i < nsds; i++) {
if (!sd[i]) /* if already added above. */
continue;
if (sd[i]->volume_offline)
hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
}
/* 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 (!changes)
goto free_and_out;
/* Notify scsi mid layer of any removed devices */
for (i = 0; i < nremoved; i++) {
if (removed[i] == NULL)
continue;
if (removed[i]->expose_device)
hpsa_remove_device(h, removed[i]);
kfree(removed[i]);
removed[i] = NULL;
}
/* Notify scsi mid layer of any added devices */
for (i = 0; i < nadded; i++) {
int rc = 0;
if (added[i] == NULL)
continue;
if (!(added[i]->expose_device))
continue;
rc = hpsa_add_device(h, added[i]);
if (!rc)
continue;
dev_warn(&h->pdev->dev,
"addition failed %d, device not added.", rc);
/* 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]);
h->drv_req_rescan = 1;
}
free_and_out:
kfree(added);
kfree(removed);
}
/*
* Lookup bus/target/lun and return 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;
}
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);
if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
struct scsi_target *starget;
struct sas_rphy *rphy;
starget = scsi_target(sdev);
rphy = target_to_rphy(starget);
sd = hpsa_find_device_by_sas_rphy(h, rphy);
if (sd) {
sd->target = sdev_id(sdev);
sd->lun = sdev->lun;
}
} else
sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
sdev_id(sdev), sdev->lun);
if (sd && sd->expose_device) {
atomic_set(&sd->ioaccel_cmds_out, 0);
sdev->hostdata = sd;
} else
sdev->hostdata = NULL;
spin_unlock_irqrestore(&h->devlock, flags);
return 0;
}
/* configure scsi device based on internal per-device structure */
static int hpsa_slave_configure(struct scsi_device *sdev)
{
struct hpsa_scsi_dev_t *sd;
int queue_depth;
sd = sdev->hostdata;
sdev->no_uld_attach = !sd || !sd->expose_device;
if (sd)
queue_depth = sd->queue_depth != 0 ?
sd->queue_depth : sdev->host->can_queue;
else
queue_depth = sdev->host->can_queue;
scsi_change_queue_depth(sdev, queue_depth);
return 0;
}
static void hpsa_slave_destroy(struct scsi_device *sdev)
{
/* nothing to do. */
}
static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
int i;
if (!h->ioaccel2_cmd_sg_list)
return;
for (i = 0; i < h->nr_cmds; i++) {
kfree(h->ioaccel2_cmd_sg_list[i]);
h->ioaccel2_cmd_sg_list[i] = NULL;
}
kfree(h->ioaccel2_cmd_sg_list);
h->ioaccel2_cmd_sg_list = NULL;
}
static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
int i;
if (h->chainsize <= 0)
return 0;
h->ioaccel2_cmd_sg_list =
kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
GFP_KERNEL);
if (!h->ioaccel2_cmd_sg_list)
return -ENOMEM;
for (i = 0; i < h->nr_cmds; i++) {
h->ioaccel2_cmd_sg_list[i] =
kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
h->maxsgentries, GFP_KERNEL);
if (!h->ioaccel2_cmd_sg_list[i])
goto clean;
}
return 0;
clean:
hpsa_free_ioaccel2_sg_chain_blocks(h);
return -ENOMEM;
}
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_alloc_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) {
dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
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]) {
dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
goto clean;
}
}
return 0;
clean:
hpsa_free_sg_chain_blocks(h);
return -ENOMEM;
}
static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
struct io_accel2_cmd *cp, struct CommandList *c)
{
struct ioaccel2_sg_element *chain_block;
u64 temp64;
u32 chain_size;
chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
chain_size = le32_to_cpu(cp->sg[0].length);
temp64 = pci_map_single(h->pdev, chain_block, chain_size,
PCI_DMA_TODEVICE);
if (dma_mapping_error(&h->pdev->dev, temp64)) {
/* prevent subsequent unmapping */
cp->sg->address = 0;
return -1;
}
cp->sg->address = cpu_to_le64(temp64);
return 0;
}
static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
struct io_accel2_cmd *cp)
{
struct ioaccel2_sg_element *chain_sg;
u64 temp64;
u32 chain_size;
chain_sg = cp->sg;
temp64 = le64_to_cpu(chain_sg->address);
chain_size = le32_to_cpu(cp->sg[0].length);
pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
struct CommandList *c)
{
struct SGDescriptor *chain_sg, *chain_block;
u64 temp64;
u32 chain_len;
chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
chain_block = h->cmd_sg_list[c->cmdindex];
chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
chain_len = sizeof(*chain_sg) *
(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
chain_sg->Len = cpu_to_le32(chain_len);
temp64 = pci_map_single(h->pdev, chain_block, chain_len,
PCI_DMA_TODEVICE);
if (dma_mapping_error(&h->pdev->dev, temp64)) {
/* prevent subsequent unmapping */
chain_sg->Addr = cpu_to_le64(0);
return -1;
}
chain_sg->Addr = cpu_to_le64(temp64);
return 0;
}
static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
struct CommandList *c)
{
struct SGDescriptor *chain_sg;
if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
return;
chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
}
/* Decode the various types of errors on ioaccel2 path.
* Return 1 for any error that should generate a RAID path retry.
* Return 0 for errors that don't require a RAID path retry.
*/
static int handle_ioaccel_mode2_error(struct ctlr_info *h,
struct CommandList *c,
struct scsi_cmnd *cmd,
struct io_accel2_cmd *c2)
{
int data_len;
int retry = 0;
u32 ioaccel2_resid = 0;
switch (c2->error_data.serv_response) {
case IOACCEL2_SERV_RESPONSE_COMPLETE:
switch (c2->error_data.status) {
case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
break;
case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
cmd->result |= SAM_STAT_CHECK_CONDITION;
if (c2->error_data.data_present !=
IOACCEL2_SENSE_DATA_PRESENT) {
memset(cmd->sense_buffer, 0,
SCSI_SENSE_BUFFERSIZE);
break;
}
/* copy the sense data */
data_len = c2->error_data.sense_data_len;
if (data_len > SCSI_SENSE_BUFFERSIZE)
data_len = SCSI_SENSE_BUFFERSIZE;
if (data_len > sizeof(c2->error_data.sense_data_buff))
data_len =
sizeof(c2->error_data.sense_data_buff);
memcpy(cmd->sense_buffer,
c2->error_data.sense_data_buff, data_len);
retry = 1;
break;
case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
retry = 1;
break;
case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
retry = 1;
break;
case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
retry = 1;
break;
case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
retry = 1;
break;
default:
retry = 1;
break;
}
break;
case IOACCEL2_SERV_RESPONSE_FAILURE:
switch (c2->error_data.status) {
case IOACCEL2_STATUS_SR_IO_ERROR:
case IOACCEL2_STATUS_SR_IO_ABORTED:
case IOACCEL2_STATUS_SR_OVERRUN:
retry = 1;
break;
case IOACCEL2_STATUS_SR_UNDERRUN:
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
ioaccel2_resid = get_unaligned_le32(
&c2->error_data.resid_cnt[0]);
scsi_set_resid(cmd, ioaccel2_resid);
break;
case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
case IOACCEL2_STATUS_SR_INVALID_DEVICE:
case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
/* We will get an event from ctlr to trigger rescan */
retry = 1;
break;
default:
retry = 1;
}
break;
case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
break;
case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
break;
case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
retry = 1;
break;
case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
break;
default:
retry = 1;
break;
}
return retry; /* retry on raid path? */
}
static void hpsa_cmd_resolve_events(struct ctlr_info *h,
struct CommandList *c)
{
bool do_wake = false;
/*
* Prevent the following race in the abort handler:
*
* 1. LLD is requested to abort a SCSI command
* 2. The SCSI command completes
* 3. The struct CommandList associated with step 2 is made available
* 4. New I/O request to LLD to another LUN re-uses struct CommandList
* 5. Abort handler follows scsi_cmnd->host_scribble and
* finds struct CommandList and tries to aborts it
* Now we have aborted the wrong command.
*
* Reset c->scsi_cmd here so that the abort or reset handler will know
* this command has completed. Then, check to see if the handler is
* waiting for this command, and, if so, wake it.
*/
c->scsi_cmd = SCSI_CMD_IDLE;
mb(); /* Declare command idle before checking for pending events. */
if (c->abort_pending) {
do_wake = true;
c->abort_pending = false;
}
if (c->reset_pending) {
unsigned long flags;
struct hpsa_scsi_dev_t *dev;
/*
* There appears to be a reset pending; lock the lock and
* reconfirm. If so, then decrement the count of outstanding
* commands and wake the reset command if this is the last one.
*/
spin_lock_irqsave(&h->lock, flags);
dev = c->reset_pending; /* Re-fetch under the lock. */
if (dev && atomic_dec_and_test(&dev->reset_cmds_out))
do_wake = true;
c->reset_pending = NULL;
spin_unlock_irqrestore(&h->lock, flags);
}
if (do_wake)
wake_up_all(&h->event_sync_wait_queue);
}
static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
struct CommandList *c)
{
hpsa_cmd_resolve_events(h, c);
cmd_tagged_free(h, c);
}
static void hpsa_cmd_free_and_done(struct ctlr_info *h,
struct CommandList *c, struct scsi_cmnd *cmd)
{
hpsa_cmd_resolve_and_free(h, c);
cmd->scsi_done(cmd);
}
static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
{
INIT_WORK(&c->work, hpsa_command_resubmit_worker);
queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
}
static void hpsa_set_scsi_cmd_aborted(struct scsi_cmnd *cmd)
{
cmd->result = DID_ABORT << 16;
}
static void hpsa_cmd_abort_and_free(struct ctlr_info *h, struct CommandList *c,
struct scsi_cmnd *cmd)
{
hpsa_set_scsi_cmd_aborted(cmd);
dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
c->Request.CDB, c->err_info->ScsiStatus);
hpsa_cmd_resolve_and_free(h, c);
}
static void process_ioaccel2_completion(struct ctlr_info *h,
struct CommandList *c, struct scsi_cmnd *cmd,
struct hpsa_scsi_dev_t *dev)
{
struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
/* check for good status */
if (likely(c2->error_data.serv_response == 0 &&
c2->error_data.status == 0))
return hpsa_cmd_free_and_done(h, c, cmd);
/*
* Any RAID offload error results in retry which will use
* the normal I/O path so the controller can handle whatever's
* wrong.
*/
if (is_logical_device(dev) &&
c2->error_data.serv_response ==
IOACCEL2_SERV_RESPONSE_FAILURE) {
if (c2->error_data.status ==
IOACCEL2_STATUS_SR_IOACCEL_DISABLED)
dev->offload_enabled = 0;
return hpsa_retry_cmd(h, c);
}
if (handle_ioaccel_mode2_error(h, c, cmd, c2))
return hpsa_retry_cmd(h, c);
return hpsa_cmd_free_and_done(h, c, cmd);
}
/* Returns 0 on success, < 0 otherwise. */
static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
struct CommandList *cp)
{
u8 tmf_status = cp->err_info->ScsiStatus;
switch (tmf_status) {
case CISS_TMF_COMPLETE:
/*
* CISS_TMF_COMPLETE never happens, instead,
* ei->CommandStatus == 0 for this case.
*/
case CISS_TMF_SUCCESS:
return 0;
case CISS_TMF_INVALID_FRAME:
case CISS_TMF_NOT_SUPPORTED:
case CISS_TMF_FAILED:
case CISS_TMF_WRONG_LUN:
case CISS_TMF_OVERLAPPED_TAG:
break;
default:
dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
tmf_status);
break;
}
return -tmf_status;
}
static void complete_scsi_command(struct CommandList *cp)
{
struct scsi_cmnd *cmd;
struct ctlr_info *h;
struct ErrorInfo *ei;
struct hpsa_scsi_dev_t *dev;
struct io_accel2_cmd *c2;
u8 sense_key;
u8 asc; /* additional sense code */
u8 ascq; /* additional sense code qualifier */
unsigned long sense_data_size;
ei = cp->err_info;
cmd = cp->scsi_cmd;
h = cp->h;
dev = cmd->device->hostdata;
c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
scsi_dma_unmap(cmd); /* undo the DMA mappings */
if ((cp->cmd_type == CMD_SCSI) &&
(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
hpsa_unmap_sg_chain_block(h, cp);
if ((cp->cmd_type == CMD_IOACCEL2) &&
(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1)
atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
/*
* We check for lockup status here as it may be set for
* CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
* fail_all_oustanding_cmds()
*/
if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
/* DID_NO_CONNECT will prevent a retry */
cmd->result = DID_NO_CONNECT << 16;
return hpsa_cmd_free_and_done(h, cp, cmd);
}
if ((unlikely(hpsa_is_pending_event(cp)))) {
if (cp->reset_pending)
return hpsa_cmd_resolve_and_free(h, cp);
if (cp->abort_pending)
return hpsa_cmd_abort_and_free(h, cp, cmd);
}
if (cp->cmd_type == CMD_IOACCEL2)
return process_ioaccel2_completion(h, cp, cmd, dev);
scsi_set_resid(cmd, ei->ResidualCnt);
if (ei->CommandStatus == 0)
return hpsa_cmd_free_and_done(h, cp, cmd);
/* For I/O accelerator commands, copy over some fields to the normal
* CISS header used below for error handling.
*/
if (cp->cmd_type == CMD_IOACCEL1) {
struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
cp->Header.SGList = scsi_sg_count(cmd);
cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
IOACCEL1_IOFLAGS_CDBLEN_MASK;
cp->Header.tag = c->tag;
memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
/* Any RAID offload error results in retry which will use
* the normal I/O path so the controller can handle whatever's
* wrong.
*/
if (is_logical_device(dev)) {
if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
dev->offload_enabled = 0;
return hpsa_retry_cmd(h, cp);
}
}
/* an error has occurred */
switch (ei->CommandStatus) {
case CMD_TARGET_STATUS:
cmd->result |= ei->ScsiStatus;
/* copy the sense data */
if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
sense_data_size = SCSI_SENSE_BUFFERSIZE;
else
sense_data_size = sizeof(ei->SenseInfo);
if (ei->SenseLen < sense_data_size)
sense_data_size = ei->SenseLen;
memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
if (ei->ScsiStatus)
decode_sense_data(ei->SenseInfo, sense_data_size,
&sense_key, &asc, &ascq);
if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
if (sense_key == ABORTED_COMMAND) {
cmd->result |= DID_SOFT_ERROR << 16;
break;
}
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,
"CDB %16phN data overrun\n", cp->Request.CDB);
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, "CDB %16phN : protocol error\n",
cp->Request.CDB);
break;
case CMD_HARDWARE_ERR:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
cp->Request.CDB);
break;
case CMD_CONNECTION_LOST:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
cp->Request.CDB);
break;
case CMD_ABORTED:
/* Return now to avoid calling scsi_done(). */
return hpsa_cmd_abort_and_free(h, cp, cmd);
case CMD_ABORT_FAILED:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
cp->Request.CDB);
break;
case CMD_UNSOLICITED_ABORT:
cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
cp->Request.CDB);
break;
case CMD_TIMEOUT:
cmd->result = DID_TIME_OUT << 16;
dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
cp->Request.CDB);
break;
case CMD_UNABORTABLE:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "Command unabortable\n");
break;
case CMD_TMF_STATUS:
if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
cmd->result = DID_ERROR << 16;
break;
case CMD_IOACCEL_DISABLED:
/* This only handles the direct pass-through case since RAID
* offload is handled above. Just attempt a retry.
*/
cmd->result = DID_SOFT_ERROR << 16;
dev_warn(&h->pdev->dev,
"cp %p had HP SSD Smart Path error\n", cp);
break;
default:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
cp, ei->CommandStatus);
}
return hpsa_cmd_free_and_done(h, cp, cmd);
}
static void hpsa_pci_unmap(struct pci_dev *pdev,
struct CommandList *c, int sg_used, int data_direction)
{
int i;
for (i = 0; i < sg_used; i++)
pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
le32_to_cpu(c->SG[i].Len),
data_direction);
}
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 = cpu_to_le16(0);
return 0;
}
addr64 = 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 = cpu_to_le16(0);
return -1;
}
cp->SG[0].Addr = cpu_to_le64(addr64);
cp->SG[0].Len = cpu_to_le32(buflen);
cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
cp->Header.SGList = 1; /* no. SGs contig in this cmd */
cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
return 0;
}
#define NO_TIMEOUT ((unsigned long) -1)
#define DEFAULT_TIMEOUT 30000 /* milliseconds */
static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
{
DECLARE_COMPLETION_ONSTACK(wait);
c->waiting = &wait;
__enqueue_cmd_and_start_io(h, c, reply_queue);
if (timeout_msecs == NO_TIMEOUT) {
/* TODO: get rid of this no-timeout thing */
wait_for_completion_io(&wait);
return IO_OK;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(timeout_msecs))) {
dev_warn(&h->pdev->dev, "Command timed out.\n");
return -ETIMEDOUT;
}
return IO_OK;
}
static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
int reply_queue, unsigned long timeout_msecs)
{
if (unlikely(lockup_detected(h))) {
c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
return IO_OK;
}
return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
}
static u32 lockup_detected(struct ctlr_info *h)
{
int cpu;
u32 rc, *lockup_detected;
cpu = get_cpu();
lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
rc = *lockup_detected;
put_cpu();
return rc;
}
#define MAX_DRIVER_CMD_RETRIES 25
static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
struct CommandList *c, int data_direction, unsigned long timeout_msecs)
{
int backoff_time = 10, retry_count = 0;
int rc;
do {
memset(c->err_info, 0, sizeof(*c->err_info));
rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
timeout_msecs);
if (rc)
break;
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);
if (retry_count > MAX_DRIVER_CMD_RETRIES)
rc = -EIO;
return rc;
}
static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
struct CommandList *c)
{
const u8 *cdb = c->Request.CDB;
const u8 *lun = c->Header.LUN.LunAddrBytes;
dev_warn(&h->pdev->dev, "%s: LUN:%02x%02x%02x%02x%02x%02x%02x%02x"
" CDB:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
txt, lun[0], lun[1], lun[2], lun[3],
lun[4], lun[5], lun[6], lun[7],
cdb[0], cdb[1], cdb[2], cdb[3],
cdb[4], cdb[5], cdb[6], cdb[7],
cdb[8], cdb[9], cdb[10], cdb[11],
cdb[12], cdb[13], cdb[14], cdb[15]);
}
static void hpsa_scsi_interpret_error(struct ctlr_info *h,
struct CommandList *cp)
{
const struct ErrorInfo *ei = cp->err_info;
struct device *d = &cp->h->pdev->dev;
u8 sense_key, asc, ascq;
int sense_len;
switch (ei->CommandStatus) {
case CMD_TARGET_STATUS:
if (ei->SenseLen > sizeof(ei->SenseInfo))
sense_len = sizeof(ei->SenseInfo);
else
sense_len = ei->SenseLen;
decode_sense_data(ei->SenseInfo, sense_len,
&sense_key, &asc, &ascq);
hpsa_print_cmd(h, "SCSI status", cp);
if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
sense_key, asc, ascq);
else
dev_warn(d, "SCSI Status = 0x%02x\n", 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. */
break;
case CMD_DATA_OVERRUN:
hpsa_print_cmd(h, "overrun condition", cp);
break;
case CMD_INVALID: {
/* controller unfortunately reports SCSI passthru's
* to non-existent targets as invalid commands.
*/
hpsa_print_cmd(h, "invalid command", cp);
dev_warn(d, "probably means device no longer present\n");
}
break;
case CMD_PROTOCOL_ERR:
hpsa_print_cmd(h, "protocol error", cp);
break;
case CMD_HARDWARE_ERR:
hpsa_print_cmd(h, "hardware error", cp);
break;
case CMD_CONNECTION_LOST:
hpsa_print_cmd(h, "connection lost", cp);
break;
case CMD_ABORTED:
hpsa_print_cmd(h, "aborted", cp);
break;
case CMD_ABORT_FAILED:
hpsa_print_cmd(h, "abort failed", cp);
break;
case CMD_UNSOLICITED_ABORT:
hpsa_print_cmd(h, "unsolicited abort", cp);
break;
case CMD_TIMEOUT:
hpsa_print_cmd(h, "timed out", cp);
break;
case CMD_UNABORTABLE:
hpsa_print_cmd(h, "unabortable", cp);
break;
case CMD_CTLR_LOCKUP:
hpsa_print_cmd(h, "controller lockup detected", cp);
break;
default:
hpsa_print_cmd(h, "unknown status", cp);
dev_warn(d, "Unknown command status %x\n",
ei->CommandStatus);
}
}
static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
u16 page, unsigned char *buf,
unsigned char bufsize)
{
int rc = IO_OK;
struct CommandList *c;
struct ErrorInfo *ei;
c = cmd_alloc(h);
if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
page, scsi3addr, TYPE_CMD)) {
rc = -1;
goto out;
}
rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
PCI_DMA_FROMDEVICE, NO_TIMEOUT);
if (rc)
goto out;
ei = c->err_info;
if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
hpsa_scsi_interpret_error(h, c);
rc = -1;
}
out:
cmd_free(h, c);
return rc;
}
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
u8 reset_type, int reply_queue)
{
int rc = IO_OK;
struct CommandList *c;
struct ErrorInfo *ei;
c = cmd_alloc(h);
/* fill_cmd can't fail here, no data buffer to map. */
(void) fill_cmd(c, reset_type, h, NULL, 0, 0,
scsi3addr, TYPE_MSG);
rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
if (rc) {
dev_warn(&h->pdev->dev, "Failed to send reset command\n");
goto out;
}
/* no unmap needed here because no data xfer. */
ei = c->err_info;
if (ei->CommandStatus != 0) {
hpsa_scsi_interpret_error(h, c);
rc = -1;
}
out:
cmd_free(h, c);
return rc;
}
static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
struct hpsa_scsi_dev_t *dev,
unsigned char *scsi3addr)
{
int i;
bool match = false;
struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
if (hpsa_is_cmd_idle(c))
return