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From: Don Brace <don.brace@pmcs.com>
To: scott.teel@pmcs.com, Kevin.Barnett@pmcs.com,
	james.bottomley@parallels.com, hch@infradead.org,
	Justin.Lindley@pmcs.com, brace@pmcs.com
Cc: linux-scsi@vger.kernel.org
Subject: [PATCH v3 12/42] hpsa: factor out hpsa_ioaccel_submit function
Date: Tue, 17 Mar 2015 15:03:30 -0500	[thread overview]
Message-ID: <20150317200330.19856.51323.stgit@brunhilda> (raw)
In-Reply-To: <20150317200139.19856.87982.stgit@brunhilda>

From: Webb Scales <webbnh@hp.com>

clean up command submission

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Signed-off-by: Webb Scales <webbnh@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
---
 drivers/scsi/hpsa.c |   91 +++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 66 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 76865df..813f3c8 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4408,6 +4408,33 @@ static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
 	c->busaddr = (u32) cmd_dma_handle;
 }
 
+static int hpsa_ioaccel_submit(struct ctlr_info *h,
+		struct CommandList *c, struct scsi_cmnd *cmd,
+		unsigned char *scsi3addr)
+{
+	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
+	int rc = IO_ACCEL_INELIGIBLE;
+
+	cmd->host_scribble = (unsigned char *) c;
+
+	if (dev->offload_enabled) {
+		hpsa_cmd_init(h, c->cmdindex, c);
+		c->cmd_type = CMD_SCSI;
+		c->scsi_cmd = cmd;
+		rc = hpsa_scsi_ioaccel_raid_map(h, c);
+		if (rc < 0)     /* scsi_dma_map failed. */
+			rc = SCSI_MLQUEUE_HOST_BUSY;
+	} else if (dev->ioaccel_handle) {
+		hpsa_cmd_init(h, c->cmdindex, c);
+		c->cmd_type = CMD_SCSI;
+		c->scsi_cmd = cmd;
+		rc = hpsa_scsi_ioaccel_direct_map(h, c);
+		if (rc < 0)     /* scsi_dma_map failed. */
+			rc = SCSI_MLQUEUE_HOST_BUSY;
+	}
+	return rc;
+}
+
 static void hpsa_command_resubmit_worker(struct work_struct *work)
 {
 	struct scsi_cmnd *cmd;
@@ -4419,15 +4446,46 @@ static void hpsa_command_resubmit_worker(struct work_struct *work)
 	dev = cmd->device->hostdata;
 	if (!dev) {
 		cmd->result = DID_NO_CONNECT << 16;
+		cmd_free(c->h, c);
 		cmd->scsi_done(cmd);
 		return;
 	}
+	if (c->cmd_type == CMD_IOACCEL2) {
+		struct ctlr_info *h = c->h;
+		struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
+		int rc;
+
+		if (c2->error_data.serv_response ==
+				IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
+			rc = hpsa_ioaccel_submit(h, c, cmd, dev->scsi3addr);
+			if (rc == 0)
+				return;
+			if (rc == SCSI_MLQUEUE_HOST_BUSY) {
+				/*
+				 * If we get here, it means dma mapping failed.
+				 * Try again via scsi mid layer, which will
+				 * then get SCSI_MLQUEUE_HOST_BUSY.
+				 */
+				cmd->result = DID_IMM_RETRY << 16;
+				cmd->scsi_done(cmd);
+				cmd_free(h, c);	/* FIX-ME:  on merge, change
+						 * to cmd_tagged_free() and
+						 * ultimately to
+						 * hpsa_cmd_free_and_done(). */
+				return;
+			}
+			/* else, fall thru and resubmit down CISS path */
+		}
+	}
 	hpsa_cmd_partial_init(c->h, c->cmdindex, c);
 	if (hpsa_ciss_submit(c->h, c, cmd, dev->scsi3addr)) {
 		/*
 		 * If we get here, it means dma mapping failed. Try
 		 * again via scsi mid layer, which will then get
 		 * SCSI_MLQUEUE_HOST_BUSY.
+		 *
+		 * hpsa_ciss_submit will have already freed c
+		 * if it encountered a dma mapping failure.
 		 */
 		cmd->result = DID_IMM_RETRY << 16;
 		cmd->scsi_done(cmd);
@@ -4477,31 +4535,14 @@ static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
 	if (likely(cmd->retries == 0 &&
 		cmd->request->cmd_type == REQ_TYPE_FS &&
 		h->acciopath_status)) {
-
-		cmd->host_scribble = (unsigned char *) c;
-
-		if (dev->offload_enabled) {
-			hpsa_cmd_init(h, c->cmdindex, c);
-			c->cmd_type = CMD_SCSI;
-			c->scsi_cmd = cmd;
-			rc = hpsa_scsi_ioaccel_raid_map(h, c);
-			if (rc == 0)
-				return 0; /* Sent on ioaccel path */
-			if (rc < 0) {   /* scsi_dma_map failed. */
-				cmd_free(h, c);
-				return SCSI_MLQUEUE_HOST_BUSY;
-			}
-		} else if (dev->ioaccel_handle) {
-			hpsa_cmd_init(h, c->cmdindex, c);
-			c->cmd_type = CMD_SCSI;
-			c->scsi_cmd = cmd;
-			rc = hpsa_scsi_ioaccel_direct_map(h, c);
-			if (rc == 0)
-				return 0; /* Sent on direct map path */
-			if (rc < 0) {   /* scsi_dma_map failed. */
-				cmd_free(h, c);
-				return SCSI_MLQUEUE_HOST_BUSY;
-			}
+		rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
+		if (rc == 0)
+			return 0;
+		if (rc == SCSI_MLQUEUE_HOST_BUSY) {
+			cmd_free(h, c);	/* FIX-ME:  on merge, change to
+					 * cmd_tagged_free(), and ultimately
+					 * to hpsa_cmd_resolve_and_free(). */
+			return SCSI_MLQUEUE_HOST_BUSY;
 		}
 	}
 	return hpsa_ciss_submit(h, c, cmd, scsi3addr);


  parent reply	other threads:[~2015-03-17 20:05 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-17 20:02 [PATCH v3 00/42] hpsa updates Don Brace
2015-03-17 20:02 ` [PATCH v3 01/42] hpsa: add masked physical devices into h->dev[] array Don Brace
2015-03-17 20:02 ` [PATCH v3 02/42] hpsa: clean up host, channel, target, lun prints Don Brace
2015-03-17 20:02 ` [PATCH v3 03/42] hpsa: rework controller command submission Don Brace
2015-03-27 15:11   ` Tomas Henzl
2015-03-27 18:04     ` brace
2015-03-17 20:02 ` [PATCH v3 04/42] hpsa: clean up aborts Don Brace
2015-03-17 20:02 ` [PATCH v3 05/42] hpsa: decrement h->commands_outstanding in fail_all_outstanding_cmds Don Brace
2015-04-02 13:33   ` Tomas Henzl
2015-03-17 20:02 ` [PATCH v3 06/42] hpsa: hpsa decode sense data for io and tmf Don Brace
2015-03-17 20:03 ` [PATCH v3 07/42] hpsa: allow lockup detected to be viewed via sysfs Don Brace
2015-03-17 20:03 ` [PATCH v3 08/42] hpsa: make function names consistent Don Brace
2015-03-17 20:03 ` [PATCH v3 09/42] hpsa: factor out hpsa_init_cmd function Don Brace
2015-03-17 20:03 ` [PATCH v3 10/42] hpsa: do not ignore return value of hpsa_register_scsi Don Brace
2015-03-17 20:03 ` [PATCH v3 11/42] hpsa: try resubmitting down raid path on task set full Don Brace
2015-03-17 20:03 ` Don Brace [this message]
2015-03-17 20:03 ` [PATCH v3 13/42] hpsa: print accurate SSD Smart Path Enabled status Don Brace
2015-03-17 20:03 ` [PATCH v3 14/42] hpsa: use ioaccel2 path to submit IOs to physical drives in HBA mode Don Brace
2015-03-17 20:03 ` [PATCH v3 15/42] hpsa: Get queue depth from identify physical bmic for physical disks Don Brace
2015-03-17 20:03 ` [PATCH v3 16/42] hpsa: break hpsa_free_irqs_and_disable_msix into two functions Don Brace
2015-03-17 20:03 ` [PATCH v3 17/42] hpsa: clean up error handling Don Brace
2015-03-17 20:04 ` [PATCH v3 18/42] hpsa: refactor freeing of resources into more logical functions Don Brace
2015-03-17 20:04 ` [PATCH v3 19/42] hpsa: add ioaccel sg chaining for the ioaccel2 path Don Brace
2015-03-17 20:04 ` [PATCH v3 20/42] hpsa: add more ioaccel2 error handling, including underrun statuses Don Brace
2015-03-17 20:04 ` [PATCH v3 21/42] hpsa: do not check cmd_alloc return value - it cannnot return NULL Don Brace
2015-03-17 20:04 ` [PATCH v3 22/42] hpsa: correct return values from driver functions Don Brace
2015-03-17 20:04 ` [PATCH v3 23/42] hpsa: clean up driver init Don Brace
2015-03-17 20:04 ` [PATCH v3 24/42] hpsa: clean up some error reporting output in abort handler Don Brace
2015-03-17 20:04 ` [PATCH v3 25/42] hpsa: do not print ioaccel2 warning messages about unusual completions Don Brace
2015-03-17 20:04 ` [PATCH v3 26/42] hpsa: add support sending aborts to physical devices via the ioaccel2 path Don Brace
2015-03-17 20:04 ` [PATCH v3 27/42] hpsa: use helper routines for finishing commands Don Brace
2015-03-17 20:04 ` [PATCH v3 28/42] hpsa: don't return abort request until target is complete Don Brace
2015-03-17 20:05 ` [PATCH v3 29/42] hpsa: refactor and rework support for sending TEST_UNIT_READY Don Brace
2015-03-17 20:05 ` [PATCH v3 30/42] hpsa: performance tweak for hpsa_scatter_gather() Don Brace
2015-03-17 20:05 ` [PATCH v3 31/42] hpsa: call pci_release_regions after pci_disable_device Don Brace
2015-03-17 20:05 ` [PATCH v3 32/42] hpsa: skip free_irq calls if irqs are not allocated Don Brace
2015-03-17 20:05 ` [PATCH v3 33/42] hpsa: cleanup for init_one step 2 in kdump Don Brace
2015-03-17 20:05 ` [PATCH v3 34/42] hpsa: fix try_soft_reset error handling Don Brace
2015-03-17 20:05 ` [PATCH v3 35/42] hpsa: create workqueue after the driver is ready for use Don Brace
2015-03-17 20:06 ` [PATCH v3 36/42] hpsa: add interrupt number to /proc/interrupts interrupt name Don Brace
2015-03-17 20:06 ` [PATCH v3 37/42] hpsa: use block layer tag for command allocation Don Brace
2015-03-23 16:57   ` Tomas Henzl
     [not found]     ` <07F70BBF6832E34FA1C923241E8833AB486892F9@BBYEXM01.pmc-sierra.internal>
2015-03-25 18:33       ` Webb Scales
2015-03-26 12:47         ` Tomas Henzl
2015-03-26 14:38           ` Webb Scales
2015-03-26 15:10             ` Tomas Henzl
2015-03-26 15:18               ` Webb Scales
2015-04-10 15:13                 ` James Bottomley
2015-03-27 18:49     ` brace
2015-03-17 20:06 ` [PATCH v3 38/42] hpsa: use scsi host_no as hpsa controller number Don Brace
2015-03-17 20:07 ` [PATCH v3 39/42] hpsa: propagate the error code in hpsa_kdump_soft_reset Don Brace
2015-03-17 20:07 ` [PATCH v3 40/42] hpsa: cleanup reset Don Brace
2015-03-17 20:07 ` [PATCH v3 41/42] hpsa: change driver version Don Brace
2015-03-17 20:07 ` [PATCH v3 42/42] hpsa: add PMC to copyright Don Brace

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