- 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@xxxxxxxxxxxxx>
Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx>
Reviewed-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx>
Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx>
---
drivers/scsi/hpsa.c | 621 +--------------------------------------------------
drivers/scsi/hpsa.h | 1
2 files changed, 8 insertions(+), 614 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index ea778cc..9a631e3 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -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 @@ static int hpsa_update_device_info(struct ctlr_info *h,
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 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
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 @@ static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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 @@ static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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 */
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index c9c4927..1c49741 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -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;
