/* List of controllers which cannot be hard reset on kexec with reset_devices */
static u32 unresettable_controller[] = {
0x324a103C, /* Smart Array P712m */
- 0x324b103C, /* SmartArray P711m */
+ 0x324b103C, /* Smart Array P711m */
0x3223103C, /* Smart Array P800 */
0x3234103C, /* Smart Array P400 */
0x3235103C, /* Smart Array P400i */
0x409D0E11, /* Smart Array 6400 EM */
};
-static int ctlr_is_hard_resettable(u32 board_id)
+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 < ARRAY_SIZE(unresettable_controller); i++)
- if (unresettable_controller[i] == board_id)
- return 0;
- return 1;
+ for (i = 0; i < nelems; i++)
+ if (a[i] == board_id)
+ return 1;
+ return 0;
}
-static int ctlr_is_soft_resettable(u32 board_id)
+static int ctlr_is_hard_resettable(u32 board_id)
{
- int i;
+ return !board_id_in_array(unresettable_controller,
+ ARRAY_SIZE(unresettable_controller), board_id);
+}
- for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
- if (soft_unresettable_controller[i] == board_id)
- return 0;
- return 1;
+static int ctlr_is_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)
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)
{
return 0;
}
+/*
+ * 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);
+ if (!c)
+ return -ENOMEM;
+ (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, NO_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;
+ 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)
strncmp(obdr_sig, OBDR_TAPE_SIG,
OBDR_SIG_LEN) == 0);
}
-
kfree(inq_buff);
return 0;
return 1;
}
+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;
+ }
+}
+
static unsigned char *ext_target_model[] = {
"MSA2012",
"MSA2024",
(*n_ext_target_devs)++;
hpsa_set_bus_target_lun(this_device,
tmpdevice->bus, tmpdevice->target, 0);
+ hpsa_update_device_supports_aborts(h, this_device, scsi3addr);
set_bit(tmpdevice->target, lunzerobits);
return 1;
}
&is_OBDR))
continue; /* skip it if we can't talk to it. */
figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
+ hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
this_device = currentsd[ncurrent];
/*
}
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
- struct CommandList *abort, int swizzle, int reply_queue)
+ struct CommandList *abort, int reply_queue)
{
int rc = IO_OK;
struct CommandList *c;
}
/* fill_cmd can't fail here, no buffer to map */
- (void) fill_cmd(c, HPSA_ABORT_MSG, h, abort,
+ (void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
0, 0, scsi3addr, TYPE_MSG);
- if (swizzle)
+ if (h->needs_abort_tags_swizzled)
swizzle_abort_tag(&c->Request.CDB[4]);
(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
hpsa_get_tag(h, abort, &taglower, &tagupper);
return rc; /* success */
}
-/* Some Smart Arrays need the abort tag swizzled, and some don't. It's hard to
- * tell which kind we're dealing with, so we send the abort both ways. There
- * shouldn't be any collisions between swizzled and unswizzled tags due to the
- * way we construct our tags but we check anyway in case the assumptions which
- * make this true someday become false.
- */
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
{
if (abort->cmd_type == CMD_IOACCEL2)
return hpsa_send_reset_as_abort_ioaccel2(h, scsi3addr,
abort, reply_queue);
-
- return hpsa_send_abort(h, scsi3addr, abort, 0, reply_queue) &&
- hpsa_send_abort(h, scsi3addr, abort, 1, reply_queue);
+ return hpsa_send_abort(h, scsi3addr, abort, reply_queue);
}
/* Find out which reply queue a command was meant to return on */
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.
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 (WARN(h == NULL,
- "ABORT REQUEST FAILED, Controller lookup failed.\n"))
+ if (h == NULL)
return FAILED;
/* Find the device of the command to be aborted */
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;
+ }
+
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);
* 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,
+ "Timed out waiting for an abort command to become available.\n");
+ cmd_free(h, abort);
+ return FAILED;
+ }
rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort, reply_queue);
+ atomic_inc(&h->abort_cmds_available);
+ wake_up_all(&h->abort_cmd_wait_queue);
if (rc != 0) {
hpsa_show_dev_msg(KERN_WARNING, h, dev,
"FAILED to abort command");
int cmd_type)
{
int pci_dir = XFER_NONE;
- struct CommandList *a; /* for commands to be aborted */
+ u64 tag; /* for commands to be aborted */
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
c->Request.CDB[7] = 0x00;
break;
case HPSA_ABORT_MSG:
- a = buff; /* point to command to be aborted */
+ memcpy(&tag, buff, sizeof(tag));
dev_dbg(&h->pdev->dev,
- "Abort Tag:0x%016llx request Tag:0x%016llx",
- a->Header.tag, c->Header.tag);
+ "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,
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], &a->Header.tag,
- sizeof(a->Header.tag));
+ 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 */
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);
spin_lock_init(&h->offline_device_lock);
spin_lock_init(&h->scan_lock);
atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
+ atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
if (!h->rescan_ctlr_wq) {
if (hpsa_allocate_sg_chain_blocks(h))
goto clean4;
init_waitqueue_head(&h->scan_wait_queue);
+ init_waitqueue_head(&h->abort_cmd_wait_queue);
h->scan_finished = 1; /* no scan currently in progress */
pci_set_drvdata(pdev, h);
projects / karo-tx-linux.git / commitdiff