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scsi: hpsa: remove abort handler 

- simplify the driver
- there are a lot of quirky racy conditions not handled
- causes more aborts/resets when the number of commands to be aborted is
  large, such as in multi-path fail-overs.
- has been turned off in our internal driver since 8/31/2015

Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Don Brace 2017-05-04 17:51:49 -05:00 committed by Martin K. Petersen
parent b63c64ac5a
commit 08ec46f673
2 changed files with 8 additions and 614 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

621
drivers/scsi/hpsa.c
View File

@ -258,7 +258,6 @@ static int hpsa_scan_finished(struct Scsi_Host *sh,
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);
@ -326,7 +325,7 @@ static inline bool hpsa_is_cmd_idle(struct CommandList *c)
static inline bool hpsa_is_pending_event(struct CommandList *c)
{
return c->abort_pending || c->reset_pending;
return c->reset_pending;
}
/* extract sense key, asc, and ascq from sense data. -1 means invalid. */
@ -581,12 +580,6 @@ static u32 soft_unresettable_controller[] = {
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;
@ -615,12 +608,6 @@ static int ctlr_is_resettable(u32 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)
{
@ -928,8 +915,8 @@ static struct device_attribute *hpsa_shost_attrs[] = {
NULL,
};
#define HPSA_NRESERVED_CMDS (HPSA_CMDS_RESERVED_FOR_ABORTS + \
HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)
#define HPSA_NRESERVED_CMDS (HPSA_CMDS_RESERVED_FOR_DRIVER +\
HPSA_MAX_CONCURRENT_PASSTHRUS)
static struct scsi_host_template hpsa_driver_template = {
.module = THIS_MODULE,
@ -941,7 +928,6 @@ static struct scsi_host_template hpsa_driver_template = {
.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,
@ -2361,26 +2347,12 @@ static void hpsa_cmd_resolve_events(struct ctlr_info *h,
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
* Reset c->scsi_cmd here so that the 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;
@ -2423,20 +2395,6 @@ static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
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)
@ -2561,12 +2519,9 @@ static void complete_scsi_command(struct CommandList *cp)
return hpsa_cmd_free_and_done(h, cp, cmd);
}
if ((unlikely(hpsa_is_pending_event(cp)))) {
if ((unlikely(hpsa_is_pending_event(cp))))
if (cp->reset_pending)
return hpsa_cmd_free_and_done(h, cp, cmd);
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);
@ -2686,8 +2641,8 @@ static void complete_scsi_command(struct CommandList *cp)
cp->Request.CDB);
break;
case CMD_ABORTED:
/* Return now to avoid calling scsi_done(). */
return hpsa_cmd_abort_and_free(h, cp, cmd);
cmd->result = DID_ABORT << 16;
break;
case CMD_ABORT_FAILED:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
@ -3793,53 +3748,6 @@ static unsigned char hpsa_volume_offline(struct ctlr_info *h,
return HPSA_LV_OK;
}
/*
* Find out if a logical device supports aborts by simply trying one.
* Smart Array may claim not to support aborts on logical drives, but
* if a MSA2000 * is connected, the drives on that will be presented
* by the Smart Array as logical drives, and aborts may be sent to
* those devices successfully. So the simplest way to find out is
* to simply try an abort and see how the device responds.
*/
static int hpsa_device_supports_aborts(struct ctlr_info *h,
unsigned char *scsi3addr)
{
struct CommandList *c;
struct ErrorInfo *ei;
int rc = 0;
u64 tag = (u64) -1; /* bogus tag */
/* Assume that physical devices support aborts */
if (!is_logical_dev_addr_mode(scsi3addr))
return 1;
c = cmd_alloc(h);
(void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
(void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
DEFAULT_TIMEOUT);
/* no unmap needed here because no data xfer. */
ei = c->err_info;
switch (ei->CommandStatus) {
case CMD_INVALID:
rc = 0;
break;
case CMD_UNABORTABLE:
case CMD_ABORT_FAILED:
rc = 1;
break;
case CMD_TMF_STATUS:
rc = hpsa_evaluate_tmf_status(h, c);
break;
default:
rc = 0;
break;
}
cmd_free(h, c);
return rc;
}
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)
@ -3939,31 +3847,6 @@ bail_out:
return rc;
}
static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
struct hpsa_scsi_dev_t *dev, u8 *scsi3addr)
{
unsigned long flags;
int rc, entry;
/*
* See if this device supports aborts. If we already know
* the device, we already know if it supports aborts, otherwise
* we have to find out if it supports aborts by trying one.
*/
spin_lock_irqsave(&h->devlock, flags);
rc = hpsa_scsi_find_entry(dev, h->dev, h->ndevices, &entry);
if ((rc == DEVICE_SAME || rc == DEVICE_UPDATED) &&
entry >= 0 && entry < h->ndevices) {
dev->supports_aborts = h->dev[entry]->supports_aborts;
spin_unlock_irqrestore(&h->devlock, flags);
} else {
spin_unlock_irqrestore(&h->devlock, flags);
dev->supports_aborts =
hpsa_device_supports_aborts(h, scsi3addr);
if (dev->supports_aborts < 0)
dev->supports_aborts = 0;
}
}
/*
* Helper function to assign bus, target, lun mapping of devices.
* Logical drive target and lun are assigned at this time, but
@ -4001,35 +3884,6 @@ static void figure_bus_target_lun(struct ctlr_info *h,
0, lunid & 0x3fff);
}
/*
* Get address of physical disk used for an ioaccel2 mode command:
* 1. Extract ioaccel2 handle from the command.
* 2. Find a matching ioaccel2 handle from list of physical disks.
* 3. Return:
* 1 and set scsi3addr to address of matching physical
* 0 if no matching physical disk was found.
*/
static int hpsa_get_pdisk_of_ioaccel2(struct ctlr_info *h,
struct CommandList *ioaccel2_cmd_to_abort, unsigned char *scsi3addr)
{
struct io_accel2_cmd *c2 =
&h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
unsigned long flags;
int i;
spin_lock_irqsave(&h->devlock, flags);
for (i = 0; i < h->ndevices; i++)
if (h->dev[i]->ioaccel_handle == le32_to_cpu(c2->scsi_nexus)) {
memcpy(scsi3addr, h->dev[i]->scsi3addr,
sizeof(h->dev[i]->scsi3addr));
spin_unlock_irqrestore(&h->devlock, flags);
return 1;
}
spin_unlock_irqrestore(&h->devlock, flags);
return 0;
}
static int figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
int i, int nphysicals, int nlocal_logicals)
{
@ -4394,7 +4248,6 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h)
}
figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
this_device = currentsd[ncurrent];
/* Turn on discovery_polling if there are ext target devices.
@ -5528,8 +5381,6 @@ static void hpsa_command_resubmit_worker(struct work_struct *work)
}
if (c->reset_pending)
return hpsa_cmd_free_and_done(c->h, c, cmd);
if (c->abort_pending)
return hpsa_cmd_abort_and_free(c->h, c, cmd);
if (c->cmd_type == CMD_IOACCEL2) {
struct ctlr_info *h = c->h;
struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
@ -5987,433 +5838,6 @@ return_reset_status:
return rc;
}
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 void hpsa_get_tag(struct ctlr_info *h,
struct CommandList *c, __le32 *taglower, __le32 *tagupper)
{
u64 tag;
if (c->cmd_type == CMD_IOACCEL1) {
struct io_accel1_cmd *cm1 = (struct io_accel1_cmd *)
&h->ioaccel_cmd_pool[c->cmdindex];
tag = le64_to_cpu(cm1->tag);
*tagupper = cpu_to_le32(tag >> 32);
*taglower = cpu_to_le32(tag);
return;
}
if (c->cmd_type == CMD_IOACCEL2) {
struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
&h->ioaccel2_cmd_pool[c->cmdindex];
/* upper tag not used in ioaccel2 mode */
memset(tagupper, 0, sizeof(*tagupper));
*taglower = cm2->Tag;
return;
}
tag = le64_to_cpu(c->Header.tag);
*tagupper = cpu_to_le32(tag >> 32);
*taglower = cpu_to_le32(tag);
}
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
struct CommandList *abort, int reply_queue)
{
int rc = IO_OK;
struct CommandList *c;
struct ErrorInfo *ei;
__le32 tagupper, taglower;
c = cmd_alloc(h);
/* fill_cmd can't fail here, no buffer to map */
(void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
0, 0, scsi3addr, TYPE_MSG);
if (h->needs_abort_tags_swizzled)
swizzle_abort_tag(&c->Request.CDB[4]);
(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
hpsa_get_tag(h, abort, &taglower, &tagupper);
dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
__func__, tagupper, taglower);
/* no unmap needed here because no data xfer. */
ei = c->err_info;
switch (ei->CommandStatus) {
case CMD_SUCCESS:
break;
case CMD_TMF_STATUS:
rc = hpsa_evaluate_tmf_status(h, c);
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__, tagupper, taglower);
hpsa_scsi_interpret_error(h, c);
rc = -1;
break;
}
cmd_free(h, c);
dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
__func__, tagupper, taglower);
return rc;
}
static void setup_ioaccel2_abort_cmd(struct CommandList *c, struct ctlr_info *h,
struct CommandList *command_to_abort, int reply_queue)
{
struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
struct io_accel2_cmd *c2a =
&h->ioaccel2_cmd_pool[command_to_abort->cmdindex];
struct scsi_cmnd *scmd = command_to_abort->scsi_cmd;
struct hpsa_scsi_dev_t *dev = scmd->device->hostdata;
if (!dev)
return;
/*
* We're overlaying struct hpsa_tmf_struct on top of something which
* was allocated as a struct io_accel2_cmd, so we better be sure it
* actually fits, and doesn't overrun the error info space.
*/
BUILD_BUG_ON(sizeof(struct hpsa_tmf_struct) >
sizeof(struct io_accel2_cmd));
BUG_ON(offsetof(struct io_accel2_cmd, error_data) <
offsetof(struct hpsa_tmf_struct, error_len) +
sizeof(ac->error_len));
c->cmd_type = IOACCEL2_TMF;
c->scsi_cmd = SCSI_CMD_BUSY;
/* Adjust the DMA address to point to the accelerated command buffer */
c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
(c->cmdindex * sizeof(struct io_accel2_cmd));
BUG_ON(c->busaddr & 0x0000007F);
memset(ac, 0, sizeof(*c2)); /* yes this is correct */
ac->iu_type = IOACCEL2_IU_TMF_TYPE;
ac->reply_queue = reply_queue;
ac->tmf = IOACCEL2_TMF_ABORT;
ac->it_nexus = cpu_to_le32(dev->ioaccel_handle);
memset(ac->lun_id, 0, sizeof(ac->lun_id));
ac->tag = cpu_to_le64(c->cmdindex << DIRECT_LOOKUP_SHIFT);
ac->abort_tag = cpu_to_le64(le32_to_cpu(c2a->Tag));
ac->error_ptr = cpu_to_le64(c->busaddr +
offsetof(struct io_accel2_cmd, error_data));
ac->error_len = cpu_to_le32(sizeof(c2->error_data));
}
/* ioaccel2 path firmware cannot handle abort task requests.
* Change abort requests to physical target reset, and send to the
* address of the physical disk used for the ioaccel 2 command.
* Return 0 on success (IO_OK)
* -1 on failure
*/
static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h,
unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
{
int rc = IO_OK;
struct scsi_cmnd *scmd; /* scsi command within request being aborted */
struct hpsa_scsi_dev_t *dev; /* device to which scsi cmd was sent */
unsigned char phys_scsi3addr[8]; /* addr of phys disk with volume */
unsigned char *psa = &phys_scsi3addr[0];
/* Get a pointer to the hpsa logical device. */
scmd = abort->scsi_cmd;
dev = (struct hpsa_scsi_dev_t *)(scmd->device->hostdata);
if (dev == NULL) {
dev_warn(&h->pdev->dev,
"Cannot abort: no device pointer for command.\n");
return -1; /* not abortable */
}
if (h->raid_offload_debug > 0)
dev_info(&h->pdev->dev,
"scsi %d:%d:%d:%d %s scsi3addr 0x%8phN\n",
h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
"Reset as abort", scsi3addr);
if (!dev->offload_enabled) {
dev_warn(&h->pdev->dev,
"Can't abort: device is not operating in HP SSD Smart Path mode.\n");
return -1; /* not abortable */
}
/* Incoming scsi3addr is logical addr. We need physical disk addr. */
if (!hpsa_get_pdisk_of_ioaccel2(h, abort, psa)) {
dev_warn(&h->pdev->dev, "Can't abort: Failed lookup of physical address.\n");
return -1; /* not abortable */
}
/* send the reset */
if (h->raid_offload_debug > 0)
dev_info(&h->pdev->dev,
"Reset as abort: Resetting physical device at scsi3addr 0x%8phN\n",
psa);
rc = hpsa_do_reset(h, dev, psa, HPSA_PHYS_TARGET_RESET, reply_queue);
if (rc != 0) {
dev_warn(&h->pdev->dev,
"Reset as abort: Failed on physical device at scsi3addr 0x%8phN\n",
psa);
return rc; /* failed to reset */
}
/* wait for device to recover */
if (wait_for_device_to_become_ready(h, psa, reply_queue) != 0) {
dev_warn(&h->pdev->dev,
"Reset as abort: Failed: Device never recovered from reset: 0x%8phN\n",
psa);
return -1; /* failed to recover */
}
/* device recovered */
dev_info(&h->pdev->dev,
"Reset as abort: Device recovered from reset: scsi3addr 0x%8phN\n",
psa);
return rc; /* success */
}
static int hpsa_send_abort_ioaccel2(struct ctlr_info *h,
struct CommandList *abort, int reply_queue)
{
int rc = IO_OK;
struct CommandList *c;
__le32 taglower, tagupper;
struct hpsa_scsi_dev_t *dev;
struct io_accel2_cmd *c2;
dev = abort->scsi_cmd->device->hostdata;
if (!dev)
return -1;
if (!dev->offload_enabled && !dev->hba_ioaccel_enabled)
return -1;
c = cmd_alloc(h);
setup_ioaccel2_abort_cmd(c, h, abort, reply_queue);
c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
hpsa_get_tag(h, abort, &taglower, &tagupper);
dev_dbg(&h->pdev->dev,
"%s: Tag:0x%08x:%08x: do_simple_cmd(ioaccel2 abort) completed.\n",
__func__, tagupper, taglower);
/* no unmap needed here because no data xfer. */
dev_dbg(&h->pdev->dev,
"%s: Tag:0x%08x:%08x: abort service response = 0x%02x.\n",
__func__, tagupper, taglower, c2->error_data.serv_response);
switch (c2->error_data.serv_response) {
case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
rc = 0;
break;
case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
case IOACCEL2_SERV_RESPONSE_FAILURE:
case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
rc = -1;
break;
default:
dev_warn(&h->pdev->dev,
"%s: Tag:0x%08x:%08x: unknown abort service response 0x%02x\n",
__func__, tagupper, taglower,
c2->error_data.serv_response);
rc = -1;
}
cmd_free(h, c);
dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
tagupper, taglower);
return rc;
}
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
struct hpsa_scsi_dev_t *dev, struct CommandList *abort, int reply_queue)
{
/*
* ioccelerator mode 2 commands should be aborted via the
* accelerated path, since RAID path is unaware of these commands,
* but not all underlying firmware can handle abort TMF.
* Change abort to physical device reset when abort TMF is unsupported.
*/
if (abort->cmd_type == CMD_IOACCEL2) {
if ((HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags) ||
dev->physical_device)
return hpsa_send_abort_ioaccel2(h, abort,
reply_queue);
else
return hpsa_send_reset_as_abort_ioaccel2(h,
dev->scsi3addr,
abort, reply_queue);
}
return hpsa_send_abort(h, dev->scsi3addr, abort, reply_queue);
}
/* Find out which reply queue a command was meant to return on */
static int hpsa_extract_reply_queue(struct ctlr_info *h,
struct CommandList *c)
{
if (c->cmd_type == CMD_IOACCEL2)
return h->ioaccel2_cmd_pool[c->cmdindex].reply_queue;
return c->Header.ReplyQueue;
}
/*
* Limit concurrency of abort commands to prevent
* over-subscription of commands
*/
static inline int wait_for_available_abort_cmd(struct ctlr_info *h)
{
#define ABORT_CMD_WAIT_MSECS 5000
return !wait_event_timeout(h->abort_cmd_wait_queue,
atomic_dec_if_positive(&h->abort_cmds_available) >= 0,
msecs_to_jiffies(ABORT_CMD_WAIT_MSECS));
}
/* 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 rc;
struct ctlr_info *h;
struct hpsa_scsi_dev_t *dev;
struct CommandList *abort; /* pointer to command to be aborted */
struct scsi_cmnd *as; /* ptr to scsi cmd inside aborted command. */
char msg[256]; /* For debug messaging. */
int ml = 0;
__le32 tagupper, taglower;
int refcount, reply_queue;
if (sc == NULL)
return FAILED;
if (sc->device == NULL)
return FAILED;
/* Find the controller of the command to be aborted */
h = sdev_to_hba(sc->device);
if (h == NULL)
return FAILED;
/* 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;
}
/* If controller locked up, we can guarantee command won't complete */
if (lockup_detected(h)) {
hpsa_show_dev_msg(KERN_WARNING, h, dev,
"ABORT FAILED, lockup detected");
return FAILED;
}
/* This is a good time to check if controller lockup has occurred */
if (detect_controller_lockup(h)) {
hpsa_show_dev_msg(KERN_WARNING, h, dev,
"ABORT FAILED, new lockup detected");
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, "scsi %d:%d:%d:%llu %s %p",
h->scsi_host->host_no, sc->device->channel,
sc->device->id, sc->device->lun,
"Aborting command", sc);
/* Get SCSI command to be aborted */
abort = (struct CommandList *) sc->host_scribble;
if (abort == NULL) {
/* This can happen if the command already completed. */
return SUCCESS;
}
refcount = atomic_inc_return(&abort->refcount);
if (refcount == 1) { /* Command is done already. */
cmd_free(h, abort);
return SUCCESS;
}
/* Don't bother trying the abort if we know it won't work. */
if (abort->cmd_type != CMD_IOACCEL2 &&
abort->cmd_type != CMD_IOACCEL1 && !dev->supports_aborts) {
cmd_free(h, abort);
return FAILED;
}
/*
* Check that we're aborting the right command.
* It's possible the CommandList already completed and got re-used.
*/
if (abort->scsi_cmd != sc) {
cmd_free(h, abort);
return SUCCESS;
}
abort->abort_pending = true;
hpsa_get_tag(h, abort, &taglower, &tagupper);
reply_queue = hpsa_extract_reply_queue(h, abort);
ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
as = abort->scsi_cmd;
if (as != NULL)
ml += sprintf(msg+ml,
"CDBLen: %d CDB: 0x%02x%02x... SN: 0x%lx ",
as->cmd_len, as->cmnd[0], as->cmnd[1],
as->serial_number);
dev_warn(&h->pdev->dev, "%s BEING SENT\n", msg);
hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
/*
* 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.
*/
if (wait_for_available_abort_cmd(h)) {
dev_warn(&h->pdev->dev,
"%s FAILED, timeout waiting for an abort command to become available.\n",
msg);
cmd_free(h, abort);
return FAILED;
}
rc = hpsa_send_abort_both_ways(h, dev, abort, reply_queue);
atomic_inc(&h->abort_cmds_available);
wake_up_all(&h->abort_cmd_wait_queue);
if (rc != 0) {
dev_warn(&h->pdev->dev, "%s SENT, FAILED\n", msg);
hpsa_show_dev_msg(KERN_WARNING, h, dev,
"FAILED to abort command");
cmd_free(h, abort);
return FAILED;
}
dev_info(&h->pdev->dev, "%s SENT, SUCCESS\n", msg);
wait_event(h->event_sync_wait_queue,
abort->scsi_cmd != sc || lockup_detected(h));
cmd_free(h, abort);
return !lockup_detected(h) ? SUCCESS : FAILED;
}
/*
* For operations with an associated SCSI command, a command block is allocated
* at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
@ -6459,9 +5883,7 @@ static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
{
/*
* Release our reference to the block. We don't need to do anything
* else to free it, because it is accessed by index. (There's no point
* in checking the result of the decrement, since we cannot guarantee
* that there isn't a concurrent abort which is also accessing it.)
* else to free it, because it is accessed by index.
*/
(void)atomic_dec(&c->refcount);
}
@ -7000,7 +6422,6 @@ static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
int cmd_type)
{
int pci_dir = XFER_NONE;
u64 tag; /* for commands to be aborted */
c->cmd_type = CMD_IOCTL_PEND;
c->scsi_cmd = SCSI_CMD_BUSY;
@ -7184,27 +6605,6 @@ static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
c->Request.CDB[6] = 0x00;
c->Request.CDB[7] = 0x00;
break;
case HPSA_ABORT_MSG:
memcpy(&tag, buff, sizeof(tag));
dev_dbg(&h->pdev->dev,
"Abort Tag:0x%016llx using rqst Tag:0x%016llx",
tag, c->Header.tag);
c->Request.CDBLen = 16;
c->Request.type_attr_dir =
TYPE_ATTR_DIR(cmd_type,
ATTR_SIMPLE, 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] */
memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
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);
@ -8162,9 +7562,6 @@ static int hpsa_pci_init(struct ctlr_info *h)
h->product_name = products[prod_index].product_name;
h->access = *(products[prod_index].access);
h->needs_abort_tags_swizzled =
ctlr_needs_abort_tags_swizzled(h->board_id);
pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
@ -8885,7 +8282,6 @@ reinit_after_soft_reset:
spin_lock_init(&h->scan_lock);
spin_lock_init(&h->reset_lock);
atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
/* Allocate and clear per-cpu variable lockup_detected */
h->lockup_detected = alloc_percpu(u32);
@ -8937,7 +8333,6 @@ reinit_after_soft_reset:
if (rc)
goto clean5; /* cmd, irq, shost, pci, lu, aer/h */
init_waitqueue_head(&h->scan_wait_queue);
init_waitqueue_head(&h->abort_cmd_wait_queue);
init_waitqueue_head(&h->event_sync_wait_queue);
mutex_init(&h->reset_mutex);
h->scan_finished = 1; /* no scan currently in progress */

1
drivers/scsi/hpsa.h
View File

@ -298,7 +298,6 @@ struct ctlr_info {
struct workqueue_struct *resubmit_wq;
struct workqueue_struct *rescan_ctlr_wq;
atomic_t abort_cmds_available;
wait_queue_head_t abort_cmd_wait_queue;
wait_queue_head_t event_sync_wait_queue;
struct mutex reset_mutex;
u8 reset_in_progress;