[SCSI] lpfc 8.3.33: Parallelize SLI-4 Q distribution
Commonize SLI-3/4 Ring/Queue framework, to keep SLI-3 compatibility
Parallelize SLI-4 Q distribution - to use multiple posting/completion queues
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index d7afd0f..982bd40 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -7796,14 +7796,14 @@
*
* Return: index into SLI4 fast-path FCP queue index.
**/
-static uint32_t
+static inline uint32_t
lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba)
{
- ++phba->fcp_qidx;
- if (phba->fcp_qidx >= phba->cfg_fcp_wq_count)
- phba->fcp_qidx = 0;
+ int i;
- return phba->fcp_qidx;
+ i = atomic_add_return(1, &phba->fcp_qidx);
+ i = (i % phba->cfg_fcp_wq_count);
+ return i;
}
/**
@@ -8323,16 +8323,6 @@
if ((piocb->iocb_flag & LPFC_IO_FCP) ||
(piocb->iocb_flag & LPFC_USE_FCPWQIDX)) {
- /*
- * For FCP command IOCB, get a new WQ index to distribute
- * WQE across the WQsr. On the other hand, for abort IOCB,
- * it carries the same WQ index to the original command
- * IOCB.
- */
- if (piocb->iocb_flag & LPFC_IO_FCP)
- piocb->fcp_wqidx = lpfc_sli4_scmd_to_wqidx_distr(phba);
- if (unlikely(!phba->sli4_hba.fcp_wq))
- return IOCB_ERROR;
if (lpfc_sli4_wq_put(phba->sli4_hba.fcp_wq[piocb->fcp_wqidx],
&wqe))
return IOCB_ERROR;
@@ -8413,11 +8403,18 @@
lpfc_sli_issue_iocb(struct lpfc_hba *phba, uint32_t ring_number,
struct lpfc_iocbq *piocb, uint32_t flag)
{
- struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
+ struct lpfc_sli_ring *pring;
unsigned long iflags;
- int rc;
+ int rc, idx;
if (phba->sli_rev == LPFC_SLI_REV4) {
+ if (piocb->iocb_flag & LPFC_IO_FCP) {
+ if (unlikely(!phba->sli4_hba.fcp_wq))
+ return IOCB_ERROR;
+ idx = lpfc_sli4_scmd_to_wqidx_distr(phba);
+ piocb->fcp_wqidx = idx;
+ ring_number = MAX_SLI3_CONFIGURED_RINGS + idx;
+ }
pring = &phba->sli.ring[ring_number];
spin_lock_irqsave(&pring->ring_lock, iflags);
rc = __lpfc_sli_issue_iocb(phba, ring_number, piocb, flag);
@@ -8712,7 +8709,9 @@
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
- psli->num_rings = MAX_CONFIGURED_RINGS;
+ psli->num_rings = MAX_SLI3_CONFIGURED_RINGS;
+ if (phba->sli_rev == LPFC_SLI_REV4)
+ psli->num_rings += phba->cfg_fcp_eq_count;
psli->sli_flag = 0;
psli->fcp_ring = LPFC_FCP_RING;
psli->next_ring = LPFC_FCP_NEXT_RING;
@@ -11191,6 +11190,7 @@
/**
* lpfc_sli4_sp_handle_els_wcqe - Handle els work-queue completion event
* @phba: Pointer to HBA context object.
+ * @cq: Pointer to associated CQ
* @wcqe: Pointer to work-queue completion queue entry.
*
* This routine handles an ELS work-queue completion event.
@@ -11198,12 +11198,12 @@
* Return: true if work posted to worker thread, otherwise false.
**/
static bool
-lpfc_sli4_sp_handle_els_wcqe(struct lpfc_hba *phba,
+lpfc_sli4_sp_handle_els_wcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
struct lpfc_wcqe_complete *wcqe)
{
struct lpfc_iocbq *irspiocbq;
unsigned long iflags;
- struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
+ struct lpfc_sli_ring *pring = cq->pring;
/* Get an irspiocbq for later ELS response processing use */
irspiocbq = lpfc_sli_get_iocbq(phba);
@@ -11408,7 +11408,7 @@
case CQE_CODE_COMPL_WQE:
/* Process the WQ/RQ complete event */
phba->last_completion_time = jiffies;
- workposted = lpfc_sli4_sp_handle_els_wcqe(phba,
+ workposted = lpfc_sli4_sp_handle_els_wcqe(phba, cq,
(struct lpfc_wcqe_complete *)&cqevt);
break;
case CQE_CODE_RELEASE_WQE:
@@ -11540,16 +11540,18 @@
/**
* lpfc_sli4_fp_handle_fcp_wcqe - Process fast-path work queue completion entry
- * @eqe: Pointer to fast-path completion queue entry.
+ * @phba: Pointer to HBA context object.
+ * @cq: Pointer to associated CQ
+ * @wcqe: Pointer to work-queue completion queue entry.
*
* This routine process a fast-path work queue completion entry from fast-path
* event queue for FCP command response completion.
**/
static void
-lpfc_sli4_fp_handle_fcp_wcqe(struct lpfc_hba *phba,
+lpfc_sli4_fp_handle_fcp_wcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
struct lpfc_wcqe_complete *wcqe)
{
- struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_FCP_RING];
+ struct lpfc_sli_ring *pring = cq->pring;
struct lpfc_iocbq *cmdiocbq;
struct lpfc_iocbq irspiocbq;
unsigned long iflags;
@@ -11667,7 +11669,7 @@
cq->CQ_wq++;
/* Process the WQ complete event */
phba->last_completion_time = jiffies;
- lpfc_sli4_fp_handle_fcp_wcqe(phba,
+ lpfc_sli4_fp_handle_fcp_wcqe(phba, cq,
(struct lpfc_wcqe_complete *)&wcqe);
break;
case CQE_CODE_RELEASE_WQE: