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path: root/drivers/scsi/lpfc/lpfc_scsi.c
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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_scsi.c65
1 files changed, 55 insertions, 10 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index c140f99772ca..e5eb40d2c512 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -3257,7 +3257,7 @@ lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
*/
nseg = scsi_dma_map(scsi_cmnd);
- if (unlikely(!nseg))
+ if (unlikely(nseg <= 0))
return 1;
sgl += 1;
/* clear the last flag in the fcp_rsp map entry */
@@ -3846,6 +3846,49 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
}
/**
+ * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
+ * @phba: Pointer to HBA context object.
+ *
+ * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
+ * distribution. This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
+ * held.
+ * If scsi-mq is enabled, get the default block layer mapping of software queues
+ * to hardware queues. This information is saved in request tag.
+ *
+ * Return: index into SLI4 fast-path FCP queue index.
+ **/
+int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
+ struct lpfc_scsi_buf *lpfc_cmd)
+{
+ struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
+ struct lpfc_vector_map_info *cpup;
+ int chann, cpu;
+ uint32_t tag;
+ uint16_t hwq;
+
+ if (shost_use_blk_mq(cmnd->device->host)) {
+ tag = blk_mq_unique_tag(cmnd->request);
+ hwq = blk_mq_unique_tag_to_hwq(tag);
+
+ return hwq;
+ }
+
+ if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
+ && phba->cfg_fcp_io_channel > 1) {
+ cpu = smp_processor_id();
+ if (cpu < phba->sli4_hba.num_present_cpu) {
+ cpup = phba->sli4_hba.cpu_map;
+ cpup += cpu;
+ return cpup->channel_id;
+ }
+ }
+ chann = atomic_add_return(1, &phba->fcp_qidx);
+ chann = (chann % phba->cfg_fcp_io_channel);
+ return chann;
+}
+
+
+/**
* lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
* @phba: The Hba for which this call is being executed.
* @pIocbIn: The command IOCBQ for the scsi cmnd.
@@ -4537,7 +4580,7 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
if (lpfc_cmd == NULL) {
lpfc_rampdown_queue_depth(phba);
- lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_MISC,
"0707 driver's buffer pool is empty, "
"IO busied\n");
goto out_host_busy;
@@ -4968,13 +5011,16 @@ lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
iocbq, iocbqrsp, lpfc_cmd->timeout);
if ((status != IOCB_SUCCESS) ||
(iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
- lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
- "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) "
- "iocb_flag x%x\n",
- lpfc_taskmgmt_name(task_mgmt_cmd),
- tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
- iocbqrsp->iocb.un.ulpWord[4],
- iocbq->iocb_flag);
+ if (status != IOCB_SUCCESS ||
+ iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
+ "0727 TMF %s to TGT %d LUN %llu "
+ "failed (%d, %d) iocb_flag x%x\n",
+ lpfc_taskmgmt_name(task_mgmt_cmd),
+ tgt_id, lun_id,
+ iocbqrsp->iocb.ulpStatus,
+ iocbqrsp->iocb.un.ulpWord[4],
+ iocbq->iocb_flag);
/* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
if (status == IOCB_SUCCESS) {
if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
@@ -4988,7 +5034,6 @@ lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
} else {
ret = FAILED;
}
- lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
} else
ret = SUCCESS;