[SCSI] qla2xxx: add support for multi-queue adapter

Following changes have been made.
1. qla_hw_data structure holds an array for request queue pointers,
and an array for response queue pointers.
2. The base request and response queues are created by default.
3. Additional request and response queues are created at the time of vport
creation. If queue resources are exhausted during vport creation, newly
created vports use the default queue.
4. Requests are sent to the request queue that the vport was assigned
in the beginning.
5. Responses are completed on the response queue with which the request queue
is associated with.

[fixup memcpy argument reversal spotted by davej@redhat.com]
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 20 insertions, 13 deletions

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index 6d6c02129a5..c538ee1b1a3 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -547,7 +547,7 @@ qla2xxx_find_flt_start(scsi_qla_host_t *vha, uint32_t *start)
 	uint16_t cnt, chksum, *wptr;
 	struct qla_flt_location *fltl;
 	struct qla_hw_data *ha = vha->hw;
-	struct req_que *req = ha->req;
+	struct req_que *req = ha->req_q_map[0];
 
 	/*
 	 * FLT-location structure resides after the last PCI region.
@@ -624,7 +624,7 @@ qla2xxx_get_flt_info(scsi_qla_host_t *vha, uint32_t flt_addr)
 	struct qla_flt_header *flt;
 	struct qla_flt_region *region;
 	struct qla_hw_data *ha = vha->hw;
-	struct req_que *req = ha->req;
+	struct req_que *req = ha->req_q_map[0];
 
 	ha->flt_region_flt = flt_addr;
 	wptr = (uint16_t *)req->ring;
@@ -730,7 +730,7 @@ qla2xxx_get_fdt_info(scsi_qla_host_t *vha)
 	uint8_t	man_id, flash_id;
 	uint16_t mid, fid;
 	struct qla_hw_data *ha = vha->hw;
-	struct req_que *req = ha->req;
+	struct req_que *req = ha->req_q_map[0];
 
 	wptr = (uint16_t *)req->ring;
 	fdt = (struct qla_fdt_layout *)req->ring;
@@ -833,6 +833,7 @@ qla2xxx_flash_npiv_conf(scsi_qla_host_t *vha)
 	void *data;
 	uint16_t *wptr;
 	uint16_t cnt, chksum;
+	int i;
 	struct qla_npiv_header hdr;
 	struct qla_npiv_entry *entry;
 	struct qla_hw_data *ha = vha->hw;
@@ -876,7 +877,7 @@ qla2xxx_flash_npiv_conf(scsi_qla_host_t *vha)
 
 	entry = data + sizeof(struct qla_npiv_header);
 	cnt = le16_to_cpu(hdr.entries);
-	for ( ; cnt; cnt--, entry++) {
+	for (i = 0; cnt; cnt--, entry++, i++) {
 		uint16_t flags;
 		struct fc_vport_identifiers vid;
 		struct fc_vport *vport;
@@ -894,19 +895,25 @@ qla2xxx_flash_npiv_conf(scsi_qla_host_t *vha)
 		vid.port_name = wwn_to_u64(entry->port_name);
 		vid.node_name = wwn_to_u64(entry->node_name);
 
+		memcpy(&ha->npiv_info[i], entry, sizeof(struct qla_npiv_entry));
+
 		DEBUG2(qla_printk(KERN_DEBUG, ha, "NPIV[%02x]: wwpn=%llx "
-		    "wwnn=%llx vf_id=0x%x qos=0x%x.\n", cnt, vid.port_name,
-		    vid.node_name, le16_to_cpu(entry->vf_id),
-		    le16_to_cpu(entry->qos)));
-
-		vport = fc_vport_create(vha->host, 0, &vid);
-		if (!vport)
-			qla_printk(KERN_INFO, ha, "NPIV-Config: Failed to "
-			    "create vport [%02x]: wwpn=%llx wwnn=%llx.\n", cnt,
-			    vid.port_name, vid.node_name);
+			"wwnn=%llx vf_id=0x%x Q_qos=0x%x F_qos=0x%x.\n", cnt,
+			vid.port_name, vid.node_name, le16_to_cpu(entry->vf_id),
+			entry->q_qos, entry->f_qos));
+
+		if (i < QLA_PRECONFIG_VPORTS) {
+			vport = fc_vport_create(vha->host, 0, &vid);
+			if (!vport)
+				qla_printk(KERN_INFO, ha,
+				"NPIV-Config: Failed to create vport [%02x]: "
+				"wwpn=%llx wwnn=%llx.\n", cnt,
+				vid.port_name, vid.node_name);
+		}
 	}
 done:
 	kfree(data);
+	ha->npiv_info = NULL;
 }
 
 static void