scsi: qla2xxx: Enable Target Multi Queue

Enable Multi Queue for Target mode. At Initiator LUN scan time, each LUN
is assign to a QPair. Each QPair is affinitize to certain CPU. When new
cmd arrives from the wire, the lunid is used to search for qpair. The
qpair's affinitized cpuid will be used to queue up the work element.

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>

1 files changed, 36 insertions, 20 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 82bbb6432f77..3963602aef35 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -371,6 +371,23 @@ static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
 		goto fail_rsp_map;
 	}
 
+	ha->base_qpair = kzalloc(sizeof(struct qla_qpair), GFP_KERNEL);
+	if (ha->base_qpair == NULL) {
+		ql_log(ql_log_warn, vha, 0x00e0,
+		    "Failed to allocate base queue pair memory.\n");
+		goto fail_base_qpair;
+	}
+
+	rsp->qpair = ha->base_qpair;
+	rsp->req = req;
+	ha->base_qpair->req = req;
+	ha->base_qpair->rsp = rsp;
+	ha->base_qpair->vha = vha;
+	ha->base_qpair->qp_lock_ptr = &ha->hardware_lock;
+	ha->base_qpair->msix = &ha->msix_entries[QLA_MSIX_RSP_Q];
+	INIT_LIST_HEAD(&ha->base_qpair->hints_list);
+	qla_cpu_update(rsp->qpair, smp_processor_id());
+
 	if (ql2xmqsupport && ha->max_qpairs) {
 		ha->queue_pair_map = kcalloc(ha->max_qpairs, sizeof(struct qla_qpair *),
 			GFP_KERNEL);
@@ -379,23 +396,8 @@ static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
 			    "Unable to allocate memory for queue pair ptrs.\n");
 			goto fail_qpair_map;
 		}
-		ha->base_qpair = kzalloc(sizeof(struct qla_qpair), GFP_KERNEL);
-		if (ha->base_qpair == NULL) {
-			ql_log(ql_log_warn, vha, 0x00e0,
-			    "Failed to allocate base queue pair memory.\n");
-			goto fail_base_qpair;
-		}
-		ha->base_qpair->req = req;
-		ha->base_qpair->rsp = rsp;
 	}
 
-	rsp->qpair = ha->base_qpair;
-	rsp->req = req;
-	ha->base_qpair->vha = vha;
-	ha->base_qpair->qp_lock_ptr = &ha->hardware_lock;
-	ha->queue_pair_map[0] = ha->base_qpair;
-	set_bit(0, ha->qpair_qid_map);
-
 	/*
 	 * Make sure we record at least the request and response queue zero in
 	 * case we need to free them if part of the probe fails.
@@ -2009,7 +2011,7 @@ qla83xx_iospace_config(struct qla_hw_data *ha)
 		/* Read MSIX vector size of the board */
 		pci_read_config_word(ha->pdev,
 		    QLA_83XX_PCI_MSIX_CONTROL, &msix);
-		ha->msix_count = msix + 1;
+		ha->msix_count = (msix & PCI_MSIX_FLAGS_QSIZE)  + 1;
 		/*
 		 * By default, driver uses at least two msix vectors
 		 * (default & rspq)
@@ -3125,12 +3127,26 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	    host->can_queue, base_vha->req,
 	    base_vha->mgmt_svr_loop_id, host->sg_tablesize);
 
-	if (ha->mqenable && qla_ini_mode_enabled(base_vha)) {
+	if (ha->mqenable) {
+		bool mq = false;
+		bool startit = false;
 		ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
-		/* Create start of day qpairs for Block MQ */
-		if (shost_use_blk_mq(host)) {
+
+		if (QLA_TGT_MODE_ENABLED()) {
+			mq = true;
+			startit = false;
+		}
+
+		if ((ql2x_ini_mode == QLA2XXX_INI_MODE_ENABLED) &&
+		    shost_use_blk_mq(host)) {
+			mq = true;
+			startit = true;
+		}
+
+		if (mq) {
+			/* Create start of day qpairs for Block MQ */
 			for (i = 0; i < ha->max_qpairs; i++)
-				qla2xxx_create_qpair(base_vha, 5,  0, true);
+				qla2xxx_create_qpair(base_vha, 5, 0, startit);
 		}
 	}