scsi: qla2xxx: Move {get|rel}_sp to base_qpair struct

Currently, qla2x00_[get_sp|rel_sp] routines does {get|release} of srb
resource/srb_mempool directly from qla_hw_data.  qla2x00_start_sp() is used to
issue management commands through the default Request Q 0 & Response Q 0 or
base_qpair. This patch moves access of these resources through
base_qpair. Instead of having knowledge of specific Q number and lock to
rsp/req queue, this change will key off the qpair that is assigned to the srb
resource. This lays the ground work for other routines to see this resource
through the qpair.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

6 files changed, 19 insertions, 16 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 902106f97020..385c46f2576e 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -4157,7 +4157,6 @@ static void qla2x00_async_gpnft_gnnft_sp_done(void *s, int res)
 		if (rc) {
 			/* Cleanup here to prevent memory leak */
 			qla24xx_sp_unmap(vha, sp);
-			sp->free(sp);
 		}
 
 		spin_lock_irqsave(&vha->work_lock, flags);
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index fbbf530a38e0..49c8f0119620 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1761,7 +1761,8 @@ qla24xx_async_abort_cmd(srb_t *cmd_sp, bool wait)
 	srb_t *sp;
 	int rval = QLA_FUNCTION_FAILED;
 
-	sp = qla2xxx_get_qpair_sp(cmd_sp->qpair, cmd_sp->fcport, GFP_KERNEL);
+	sp = qla2xxx_get_qpair_sp(cmd_sp->vha, cmd_sp->qpair, cmd_sp->fcport,
+	    GFP_KERNEL);
 	if (!sp)
 		goto done;
 
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
index 4351736b2426..bf9a6f01fd9f 100644
--- a/drivers/scsi/qla2xxx/qla_inline.h
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -209,7 +209,8 @@ qla2x00_chip_is_down(scsi_qla_host_t *vha)
 }
 
 static inline srb_t *
-qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
+qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
+    fc_port_t *fcport, gfp_t flag)
 {
 	srb_t *sp = NULL;
 	uint8_t bail;
@@ -225,7 +226,9 @@ qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
 	memset(sp, 0, sizeof(*sp));
 	sp->fcport = fcport;
 	sp->iocbs = 1;
-	sp->vha = qpair->vha;
+	sp->vha = vha;
+	sp->qpair = qpair;
+	sp->cmd_type = TYPE_SRB;
 	INIT_LIST_HEAD(&sp->elem);
 
 done:
@@ -246,19 +249,17 @@ qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 {
 	srb_t *sp = NULL;
 	uint8_t bail;
+	struct qla_qpair *qpair;
 
 	QLA_VHA_MARK_BUSY(vha, bail);
 	if (unlikely(bail))
 		return NULL;
 
-	sp = mempool_alloc(vha->hw->srb_mempool, flag);
+	qpair = vha->hw->base_qpair;
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
 	if (!sp)
 		goto done;
 
-	memset(sp, 0, sizeof(*sp));
-	sp->fcport = fcport;
-	sp->cmd_type = TYPE_SRB;
-	sp->iocbs = 1;
 	sp->vha = vha;
 done:
 	if (!sp)
@@ -270,7 +271,7 @@ static inline void
 qla2x00_rel_sp(srb_t *sp)
 {
 	QLA_VHA_MARK_NOT_BUSY(sp->vha);
-	mempool_free(sp, sp->vha->hw->srb_mempool);
+	qla2xxx_rel_qpair_sp(sp->qpair, sp);
 }
 
 static inline void
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index c699bbb8485b..6335b8ce5fbd 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -3440,12 +3440,13 @@ qla2x00_start_sp(srb_t *sp)
 	int rval;
 	scsi_qla_host_t *vha = sp->vha;
 	struct qla_hw_data *ha = vha->hw;
+	struct qla_qpair *qp = sp->qpair;
 	void *pkt;
 	unsigned long flags;
 
 	rval = QLA_FUNCTION_FAILED;
-	spin_lock_irqsave(&ha->hardware_lock, flags);
-	pkt = qla2x00_alloc_iocbs(vha, sp);
+	spin_lock_irqsave(qp->qp_lock_ptr, flags);
+	pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
 	if (!pkt) {
 		ql_log(ql_log_warn, vha, 0x700c,
 		    "qla2x00_alloc_iocbs failed.\n");
@@ -3523,9 +3524,9 @@ qla2x00_start_sp(srb_t *sp)
 	}
 
 	wmb();
-	qla2x00_start_iocbs(vha, ha->req_q_map[0]);
+	qla2x00_start_iocbs(vha, qp->req);
 done:
-	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+	spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
 	return rval;
 }
 
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 20d9dc39f0fb..42dc846cc8dd 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -506,7 +506,7 @@ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
 		return -EBUSY;
 
 	/* Alloc SRB structure */
-	sp = qla2xxx_get_qpair_sp(qpair, fcport, GFP_ATOMIC);
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, GFP_ATOMIC);
 	if (!sp)
 		return -EBUSY;
 
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 6fa321a4229d..210e5c2999f4 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -398,6 +398,7 @@ static void qla_init_base_qpair(struct scsi_qla_host *vha, struct req_que *req,
 	ha->base_qpair->qp_lock_ptr = &ha->hardware_lock;
 	ha->base_qpair->use_shadow_reg = IS_SHADOW_REG_CAPABLE(ha) ? 1 : 0;
 	ha->base_qpair->msix = &ha->msix_entries[QLA_MSIX_RSP_Q];
+	ha->base_qpair->srb_mempool = ha->srb_mempool;
 	INIT_LIST_HEAD(&ha->base_qpair->hints_list);
 	ha->base_qpair->enable_class_2 = ql2xenableclass2;
 	/* init qpair to this cpu. Will adjust at run time. */
@@ -1013,7 +1014,7 @@ qla2xxx_mqueuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd,
 	else
 		goto qc24_target_busy;
 
-	sp = qla2xxx_get_qpair_sp(qpair, fcport, GFP_ATOMIC);
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, GFP_ATOMIC);
 	if (!sp)
 		goto qc24_host_busy;