[SCSI] qla2xxx: Add QoS support.

Set the number of request queues to the module paramater
ql2xmaxqueues.  Each vport gets a request queue. The QoS value
set to the request queues determines priority control for queued
IOs. If QoS value is not specified, the vports use the default
queue 0.

Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 12 deletions

diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index a8abbb95730d..94b69d86482d 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -453,6 +453,7 @@ __qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
                         mrk24->lun[2] = MSB(lun);
                         host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
                         mrk24->vp_index = vha->vp_idx;
+                        mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
                 } else {
                         SET_TARGET_ID(ha, mrk->target, loop_id);
                         mrk->lun = cpu_to_le16(lun);
@@ -531,9 +532,6 @@ qla2x00_req_pkt(struct scsi_qla_host *vha, struct req_que *req,
                         for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++)
                                 *dword_ptr++ = 0;
 
-                        /* Set system defined field. */
-                        pkt->sys_define = (uint8_t)req->ring_index;
-
                         /* Set entry count. */
                         pkt->entry_count = 1;
 
@@ -724,19 +722,14 @@ qla24xx_start_scsi(srb_t *sp)
         struct scsi_cmnd *cmd = sp->cmd;
         struct scsi_qla_host *vha = sp->fcport->vha;
         struct qla_hw_data *ha = vha->hw;
-        uint16_t que_id;
 
         /* Setup device pointers. */
         ret = 0;
-        que_id = vha->req_ques[0];
 
-        req = ha->req_q_map[que_id];
+        req = vha->req;
+        rsp = ha->rsp_q_map[0];
         sp->que = req;
 
-        if (req->rsp)
-                rsp = req->rsp;
-        else
-                rsp = ha->rsp_q_map[que_id];
         /* So we know we haven't pci_map'ed anything yet */
         tot_dsds = 0;
 
@@ -794,7 +787,7 @@ qla24xx_start_scsi(srb_t *sp)
         req->cnt -= req_cnt;
 
         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
-        cmd_pkt->handle = handle;
+        cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
 
         /* Zero out remaining portion of packet. */
         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
@@ -823,6 +816,8 @@ qla24xx_start_scsi(srb_t *sp)
 
         /* Set total data segment count. */
         cmd_pkt->entry_count = (uint8_t)req_cnt;
+        /* Specify response queue number where completion should happen */
+        cmd_pkt->entry_status = (uint8_t) rsp->id;
         wmb();
 
         /* Adjust ring index. */
@@ -842,7 +837,7 @@ qla24xx_start_scsi(srb_t *sp)
         /* Manage unprocessed RIO/ZIO commands in response queue. */
         if (vha->flags.process_response_queue &&
                 rsp->ring_ptr->signature != RESPONSE_PROCESSED)
-                qla24xx_process_response_queue(rsp);
+                qla24xx_process_response_queue(vha, rsp);
 
         spin_unlock_irqrestore(&ha->hardware_lock, flags);
         return QLA_SUCCESS;