diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/hpsa.c | 176 | ||||
| -rw-r--r-- | drivers/scsi/hpsa.h | 4 |
2 files changed, 147 insertions, 33 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 2461f4f6af29..ae9d9e17da37 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -428,7 +428,7 @@ static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev, /* 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 */ @@ -470,24 +470,32 @@ static u32 soft_unresettable_controller[] = { 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) @@ -496,6 +504,12 @@ 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) { @@ -2803,6 +2817,50 @@ static int hpsa_volume_offline(struct ctlr_info *h, 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) @@ -2869,7 +2927,6 @@ static int hpsa_update_device_info(struct ctlr_info *h, strncmp(obdr_sig, OBDR_TAPE_SIG, OBDR_SIG_LEN) == 0); } - kfree(inq_buff); return 0; @@ -2878,6 +2935,31 @@ bail_out: 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", @@ -2983,6 +3065,7 @@ static int add_ext_target_dev(struct ctlr_info *h, (*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; } @@ -3237,6 +3320,7 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno) &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]; /* @@ -4538,7 +4622,7 @@ static void hpsa_get_tag(struct ctlr_info *h, } 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; @@ -4552,9 +4636,9 @@ static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr, } /* 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); @@ -4660,12 +4744,6 @@ static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h, 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) { @@ -4677,9 +4755,7 @@ static int hpsa_send_abort_both_ways(struct ctlr_info *h, 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 */ @@ -4691,6 +4767,18 @@ static int hpsa_extract_reply_queue(struct ctlr_info *h, 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. @@ -4711,10 +4799,12 @@ static int hpsa_eh_abort_handler(struct scsi_cmnd *sc) 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 */ @@ -4761,6 +4851,14 @@ static int hpsa_eh_abort_handler(struct scsi_cmnd *sc) 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); @@ -4775,7 +4873,15 @@ static int hpsa_eh_abort_handler(struct scsi_cmnd *sc) * 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"); @@ -5348,7 +5454,7 @@ static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, 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; @@ -5464,10 +5570,10 @@ static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, 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, @@ -5478,8 +5584,7 @@ static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, 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 */ @@ -6430,6 +6535,9 @@ 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); @@ -7049,6 +7157,7 @@ reinit_after_soft_reset: 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) { @@ -7106,6 +7215,7 @@ reinit_after_soft_reset: 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); diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index 58f3315fc6a9..df2468cd72cf 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -69,6 +69,7 @@ struct hpsa_scsi_dev_t { * devices in order to honor physical device queue depth limits. */ struct hpsa_scsi_dev_t *phys_disk[RAID_MAP_MAX_ENTRIES]; + int supports_aborts; #define HPSA_DO_NOT_EXPOSE 0x0 #define HPSA_SG_ATTACH 0x1 #define HPSA_ULD_ATTACH 0x2 @@ -257,8 +258,11 @@ struct ctlr_info { struct list_head offline_device_list; int acciopath_status; int raid_offload_debug; + int needs_abort_tags_swizzled; struct workqueue_struct *resubmit_wq; struct workqueue_struct *rescan_ctlr_wq; + atomic_t abort_cmds_available; + wait_queue_head_t abort_cmd_wait_queue; }; struct offline_device_entry { |