[PATCH 12/43] hpsa: factor out hpsa_ioaccel_submit function

Don Brace
2015-02-21T22:19:55Z

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 5f19cff..accfede 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4428,6 +4428,33 @@ 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;
@@ -4439,15 +4466,46 @@ 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);
@@ -4497,31 +4555,14 @@ 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);