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Message-ID: <20120501164251.11705.8052.stgit@beardog.cce.hp.com>
Date: Tue, 01 May 2012 11:42:51 -0500
From: "Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
To: james.bottomley@...senpartnership.com
Cc: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
stephenmcameron@...il.com, thenzl@...hat.com,
akpm@...ux-foundation.org, mikem@...rdog.cce.hp.com
Subject: [PATCH 09/17] hpsa: add abort error handler function
From: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
---
drivers/scsi/hpsa.c | 221 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/scsi/hpsa.h | 21 ++++
drivers/scsi/hpsa_cmd.h | 31 ++++++-
3 files changed, 271 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 49b31ad..abf5c7e 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -159,6 +159,7 @@ static int hpsa_change_queue_depth(struct scsi_device *sdev,
int qdepth, int reason);
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 void hpsa_slave_destroy(struct scsi_device *sdev);
@@ -180,6 +181,7 @@ static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
void __iomem *vaddr, int wait_for_ready);
+static inline void finish_cmd(struct CommandList *c);
#define BOARD_NOT_READY 0
#define BOARD_READY 1
@@ -507,6 +509,7 @@ 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,
@@ -2352,6 +2355,191 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
return FAILED;
}
+static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
+ struct CommandList *abort)
+{
+ int rc = IO_OK;
+ struct CommandList *c;
+ struct ErrorInfo *ei;
+
+ c = cmd_special_alloc(h);
+ if (c == NULL) { /* trouble... */
+ dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
+ return -ENOMEM;
+ }
+
+ fill_cmd(c, HPSA_ABORT_MSG, h, abort, 0, 0, scsi3addr, TYPE_MSG);
+ hpsa_scsi_do_simple_cmd_core(h, c);
+ dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd_core completed.\n",
+ __func__, abort->Header.Tag.upper, abort->Header.Tag.lower);
+ /* no unmap needed here because no data xfer. */
+
+ ei = c->err_info;
+ switch (ei->CommandStatus) {
+ case CMD_SUCCESS:
+ 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__, abort->Header.Tag.upper,
+ abort->Header.Tag.lower);
+ hpsa_scsi_interpret_error(c);
+ rc = -1;
+ break;
+ }
+ cmd_special_free(h, c);
+ dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
+ abort->Header.Tag.upper, abort->Header.Tag.lower);
+ return rc;
+}
+
+/*
+ * hpsa_find_cmd_in_queue
+ *
+ * Used to determine whether a command (find) is still present
+ * in queue_head. Optionally excludes the last element of queue_head.
+ *
+ * This is used to avoid unnecessary aborts. Commands in h->reqQ have
+ * not yet been submitted, and so can be aborted by the driver without
+ * sending an abort to the hardware.
+ *
+ * Returns pointer to command if found in queue, NULL otherwise.
+ */
+static struct CommandList *hpsa_find_cmd_in_queue(struct ctlr_info *h,
+ struct scsi_cmnd *find, struct list_head *queue_head)
+{
+ unsigned long flags;
+ struct CommandList *c = NULL; /* ptr into cmpQ */
+
+ if (!find)
+ return 0;
+ spin_lock_irqsave(&h->lock, flags);
+ list_for_each_entry(c, queue_head, list) {
+ if (c->scsi_cmd == NULL) /* e.g.: passthru ioctl */
+ continue;
+ if (c->scsi_cmd == find) {
+ spin_unlock_irqrestore(&h->lock, flags);
+ return c;
+ }
+ }
+ spin_unlock_irqrestore(&h->lock, flags);
+ return NULL;
+}
+
+/* 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 i, rc;
+ struct ctlr_info *h;
+ struct hpsa_scsi_dev_t *dev;
+ struct CommandList *abort; /* pointer to command to be aborted */
+ struct CommandList *found;
+ struct scsi_cmnd *as; /* ptr to scsi cmd inside aborted command. */
+ char msg[256]; /* For debug messaging. */
+ int ml = 0;
+
+ /* 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"))
+ 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, "ABORT REQUEST on C%d:B%d:T%d:L%d ",
+ h->scsi_host->host_no, sc->device->channel,
+ sc->device->id, sc->device->lun);
+
+ /* 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;
+ }
+
+ /* Get SCSI command to be aborted */
+ abort = (struct CommandList *) sc->host_scribble;
+ if (abort == NULL) {
+ dev_err(&h->pdev->dev, "%s FAILED, Command to abort is NULL.\n",
+ msg);
+ return FAILED;
+ }
+
+ ml += sprintf(msg+ml, "Tag:0x%08x:%08x ",
+ abort->Header.Tag.upper, abort->Header.Tag.lower);
+ as = (struct scsi_cmnd *) abort->scsi_cmd;
+ if (as != NULL)
+ ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
+ as->cmnd[0], as->serial_number);
+ dev_dbg(&h->pdev->dev, "%s\n", msg);
+ dev_warn(&h->pdev->dev, "Abort request on C%d:B%d:T%d:L%d\n",
+ h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
+
+ /* Search reqQ to See if command is queued but not submitted,
+ * if so, complete the command with aborted status and remove
+ * it from the reqQ.
+ */
+ found = hpsa_find_cmd_in_queue(h, sc, &h->reqQ);
+ if (found) {
+ found->err_info->CommandStatus = CMD_ABORTED;
+ finish_cmd(found);
+ dev_info(&h->pdev->dev, "%s Request SUCCEEDED (driver queue).\n",
+ msg);
+ return SUCCESS;
+ }
+
+ /* not in reqQ, if also not in cmpQ, must have already completed */
+ found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
+ if (!found) {
+ dev_dbg(&h->pdev->dev, "%s Request FAILED (not known to driver).\n",
+ msg);
+ return SUCCESS;
+ }
+
+ /*
+ * 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.
+ */
+ rc = hpsa_send_abort(h, dev->scsi3addr, abort);
+ if (rc != 0) {
+ dev_dbg(&h->pdev->dev, "%s Request FAILED.\n", msg);
+ dev_warn(&h->pdev->dev, "FAILED abort on device C%d:B%d:T%d:L%d\n",
+ h->scsi_host->host_no,
+ dev->bus, dev->target, dev->lun);
+ return FAILED;
+ }
+ dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);
+
+ /* If the abort(s) above completed and actually aborted the
+ * command, then the command to be aborted should already be
+ * completed. If not, wait around a bit more to see if they
+ * manage to complete normally.
+ */
+#define ABORT_COMPLETE_WAIT_SECS 30
+ for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
+ found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
+ if (!found)
+ return SUCCESS;
+ msleep(100);
+ }
+ dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
+ msg, ABORT_COMPLETE_WAIT_SECS);
+ return FAILED;
+}
+
+
/*
* For operations that cannot sleep, a command block is allocated at init,
* and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
@@ -2884,6 +3072,7 @@ static void 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 */
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
@@ -2967,8 +3156,35 @@ static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
c->Request.CDB[5] = 0x00;
c->Request.CDB[6] = 0x00;
c->Request.CDB[7] = 0x00;
+ break;
+ case HPSA_ABORT_MSG:
+ a = buff; /* point to command to be aborted */
+ dev_dbg(&h->pdev->dev, "Abort Tag:0x%08x:%08x using request Tag:0x%08x:%08x\n",
+ a->Header.Tag.upper, a->Header.Tag.lower,
+ c->Header.Tag.upper, c->Header.Tag.lower);
+ c->Request.CDBLen = 16;
+ c->Request.Type.Type = TYPE_MSG;
+ c->Request.Type.Attribute = ATTR_SIMPLE;
+ c->Request.Type.Direction = 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] */
+ c->Request.CDB[4] = a->Header.Tag.lower & 0xFF;
+ c->Request.CDB[5] = (a->Header.Tag.lower >> 8) & 0xFF;
+ c->Request.CDB[6] = (a->Header.Tag.lower >> 16) & 0xFF;
+ c->Request.CDB[7] = (a->Header.Tag.lower >> 24) & 0xFF;
+ c->Request.CDB[8] = a->Header.Tag.upper & 0xFF;
+ c->Request.CDB[9] = (a->Header.Tag.upper >> 8) & 0xFF;
+ c->Request.CDB[10] = (a->Header.Tag.upper >> 16) & 0xFF;
+ c->Request.CDB[11] = (a->Header.Tag.upper >> 24) & 0xFF;
+ 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);
@@ -3848,6 +4064,9 @@ static void __devinit hpsa_find_board_params(struct ctlr_info *h)
h->maxsgentries = 31; /* default to traditional values */
h->chainsize = 0;
}
+
+ /* Find out what task management functions are supported and cache */
+ h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
}
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index 48f7812..d8aa95c 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -125,6 +125,27 @@ struct ctlr_info {
u64 last_heartbeat_timestamp;
u32 lockup_detected;
struct list_head lockup_list;
+ u32 TMFSupportFlags; /* cache what task mgmt funcs are supported. */
+#define HPSATMF_BITS_SUPPORTED (1 << 0)
+#define HPSATMF_PHYS_LUN_RESET (1 << 1)
+#define HPSATMF_PHYS_NEX_RESET (1 << 2)
+#define HPSATMF_PHYS_TASK_ABORT (1 << 3)
+#define HPSATMF_PHYS_TSET_ABORT (1 << 4)
+#define HPSATMF_PHYS_CLEAR_ACA (1 << 5)
+#define HPSATMF_PHYS_CLEAR_TSET (1 << 6)
+#define HPSATMF_PHYS_QRY_TASK (1 << 7)
+#define HPSATMF_PHYS_QRY_TSET (1 << 8)
+#define HPSATMF_PHYS_QRY_ASYNC (1 << 9)
+#define HPSATMF_MASK_SUPPORTED (1 << 16)
+#define HPSATMF_LOG_LUN_RESET (1 << 17)
+#define HPSATMF_LOG_NEX_RESET (1 << 18)
+#define HPSATMF_LOG_TASK_ABORT (1 << 19)
+#define HPSATMF_LOG_TSET_ABORT (1 << 20)
+#define HPSATMF_LOG_CLEAR_ACA (1 << 21)
+#define HPSATMF_LOG_CLEAR_TSET (1 << 22)
+#define HPSATMF_LOG_QRY_TASK (1 << 23)
+#define HPSATMF_LOG_QRY_TSET (1 << 24)
+#define HPSATMF_LOG_QRY_ASYNC (1 << 25)
};
#define HPSA_ABORT_MSG 0
#define HPSA_DEVICE_RESET_MSG 1
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 8049815..14b56c9 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -82,6 +82,29 @@
#define TYPE_CMD 0x00
#define TYPE_MSG 0x01
+/* Message Types */
+#define HPSA_TASK_MANAGEMENT 0x00
+#define HPSA_RESET 0x01
+#define HPSA_SCAN 0x02
+#define HPSA_NOOP 0x03
+
+#define HPSA_CTLR_RESET_TYPE 0x00
+#define HPSA_BUS_RESET_TYPE 0x01
+#define HPSA_TARGET_RESET_TYPE 0x03
+#define HPSA_LUN_RESET_TYPE 0x04
+#define HPSA_NEXUS_RESET_TYPE 0x05
+
+/* Task Management Functions */
+#define HPSA_TMF_ABORT_TASK 0x00
+#define HPSA_TMF_ABORT_TASK_SET 0x01
+#define HPSA_TMF_CLEAR_ACA 0x02
+#define HPSA_TMF_CLEAR_TASK_SET 0x03
+#define HPSA_TMF_QUERY_TASK 0x04
+#define HPSA_TMF_QUERY_TASK_SET 0x05
+#define HPSA_TMF_QUERY_ASYNCEVENT 0x06
+
+
+
/* config space register offsets */
#define CFG_VENDORID 0x00
#define CFG_DEVICEID 0x02
@@ -337,11 +360,17 @@ struct CfgTable {
u32 MaxPhysicalDevices;
u32 MaxPhysicalDrivesPerLogicalUnit;
u32 MaxPerformantModeCommands;
- u8 reserved[0x78 - 0x58];
+ u32 MaxBlockFetch;
+ u32 PowerConservationSupport;
+ u32 PowerConservationEnable;
+ u32 TMFSupportFlags;
+ u8 TMFTagMask[8];
+ u8 reserved[0x78 - 0x70];
u32 misc_fw_support; /* offset 0x78 */
#define MISC_FW_DOORBELL_RESET (0x02)
#define MISC_FW_DOORBELL_RESET2 (0x010)
u8 driver_version[32];
+
};
#define NUM_BLOCKFETCH_ENTRIES 8
--
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