[SCSI] qla2xxx: Add CT passthru support for ISP23xx adapters

Signed-off-by: Harish Zunjarrao <harish.zunjarrao@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

3 files changed, 162 insertions, 10 deletions

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 518fccfbfdb2..04ead0620d5f 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -396,15 +396,6 @@ qla2x00_process_ct(struct fc_bsg_job *bsg_job)
         char  *type = "FC_BSG_HST_CT";
         struct srb_ctx *ct;
 
-        /* pass through is supported only for ISP 4Gb or higher */
-        if (!IS_FWI2_CAPABLE(ha)) {
-                DEBUG2(qla_printk(KERN_INFO, ha,
-                    "scsi(%ld):Firmware is not capable to support FC "
-                    "CT pass thru\n", vha->host_no));
-                rval = -EPERM;
-                goto done;
-        }
-
         req_sg_cnt =
                 dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
                         bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 370646f7b3ff..e27d94713bdf 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -1765,6 +1765,82 @@ qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
 }
 
 static void
+qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
+{
+        uint16_t        avail_dsds;
+        uint32_t        *cur_dsd;
+        struct scatterlist *sg;
+        int index;
+        uint16_t tot_dsds;
+        scsi_qla_host_t *vha = sp->fcport->vha;
+        struct qla_hw_data *ha = vha->hw;
+        struct fc_bsg_job *bsg_job = ((struct srb_ctx *)sp->ctx)->u.bsg_job;
+        int loop_iterartion = 0;
+        int cont_iocb_prsnt = 0;
+        int entry_count = 1;
+
+        memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
+        ct_iocb->entry_type = CT_IOCB_TYPE;
+        ct_iocb->entry_status = 0;
+        ct_iocb->handle1 = sp->handle;
+        SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
+        ct_iocb->status = __constant_cpu_to_le16(0);
+        ct_iocb->control_flags = __constant_cpu_to_le16(0);
+        ct_iocb->timeout = 0;
+        ct_iocb->cmd_dsd_count =
+            __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
+        ct_iocb->total_dsd_count =
+            __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
+        ct_iocb->req_bytecount =
+            cpu_to_le32(bsg_job->request_payload.payload_len);
+        ct_iocb->rsp_bytecount =
+            cpu_to_le32(bsg_job->reply_payload.payload_len);
+
+        ct_iocb->dseg_req_address[0] = cpu_to_le32(LSD(sg_dma_address
+            (bsg_job->request_payload.sg_list)));
+        ct_iocb->dseg_req_address[1] = cpu_to_le32(MSD(sg_dma_address
+            (bsg_job->request_payload.sg_list)));
+        ct_iocb->dseg_req_length = ct_iocb->req_bytecount;
+
+        ct_iocb->dseg_rsp_address[0] = cpu_to_le32(LSD(sg_dma_address
+            (bsg_job->reply_payload.sg_list)));
+        ct_iocb->dseg_rsp_address[1] = cpu_to_le32(MSD(sg_dma_address
+            (bsg_job->reply_payload.sg_list)));
+        ct_iocb->dseg_rsp_length = ct_iocb->rsp_bytecount;
+
+        avail_dsds = 1;
+        cur_dsd = (uint32_t *)ct_iocb->dseg_rsp_address;
+        index = 0;
+        tot_dsds = bsg_job->reply_payload.sg_cnt;
+
+        for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
+                dma_addr_t       sle_dma;
+                cont_a64_entry_t *cont_pkt;
+
+                /* Allocate additional continuation packets? */
+                if (avail_dsds == 0) {
+                        /*
+                        * Five DSDs are available in the Cont.
+                        * Type 1 IOCB.
+                               */
+                        cont_pkt = qla2x00_prep_cont_type1_iocb(vha);
+                        cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
+                        avail_dsds = 5;
+                        cont_iocb_prsnt = 1;
+                        entry_count++;
+                }
+
+                sle_dma = sg_dma_address(sg);
+                *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
+                *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
+                *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
+                loop_iterartion++;
+                avail_dsds--;
+        }
+        ct_iocb->entry_count = entry_count;
+}
+
+static void
 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
 {
         uint16_t        avail_dsds;
@@ -1867,7 +1943,9 @@ qla2x00_start_sp(srb_t *sp)
                 qla24xx_els_iocb(sp, pkt);
                 break;
         case SRB_CT_CMD:
-                qla24xx_ct_iocb(sp, pkt);
+                IS_FWI2_CAPABLE(ha) ?
+                qla24xx_ct_iocb(sp, pkt) :
+                qla2x00_ct_iocb(sp, pkt);
                 break;
         case SRB_ADISC_CMD:
                 IS_FWI2_CAPABLE(ha) ?
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index ffc855f7697d..518003328226 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -984,6 +984,86 @@ logio_done:
 }
 
 static void
+qla2x00_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
+    sts_entry_t *pkt, int iocb_type)
+{
+        const char func[] = "CT_IOCB";
+        const char *type;
+        struct qla_hw_data *ha = vha->hw;
+        srb_t *sp;
+        struct srb_ctx *sp_bsg;
+        struct fc_bsg_job *bsg_job;
+        uint16_t comp_status;
+
+        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
+        if (!sp)
+                return;
+
+        sp_bsg = sp->ctx;
+        bsg_job = sp_bsg->u.bsg_job;
+
+        type = NULL;
+        switch (sp_bsg->type) {
+        case SRB_CT_CMD:
+                type = "ct pass-through";
+                break;
+        default:
+                qla_printk(KERN_WARNING, ha,
+                    "%s: Unrecognized SRB: (%p) type=%d.\n", func, sp,
+                    sp_bsg->type);
+                return;
+        }
+
+        comp_status = le16_to_cpu(pkt->comp_status);
+
+        /* return FC_CTELS_STATUS_OK and leave the decoding of the ELS/CT
+         * fc payload  to the caller
+         */
+        bsg_job->reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
+        bsg_job->reply_len = sizeof(struct fc_bsg_reply);
+
+        if (comp_status != CS_COMPLETE) {
+                if (comp_status == CS_DATA_UNDERRUN) {
+                        bsg_job->reply->result = DID_OK << 16;
+                        bsg_job->reply->reply_payload_rcv_len =
+                            le16_to_cpu(((sts_entry_t *)pkt)->rsp_info_len);
+
+                        DEBUG2(qla_printk(KERN_WARNING, ha,
+                            "scsi(%ld): CT pass-through-%s error "
+                            "comp_status-status=0x%x total_byte = 0x%x.\n",
+                            vha->host_no, type, comp_status,
+                            bsg_job->reply->reply_payload_rcv_len));
+                } else {
+                        DEBUG2(qla_printk(KERN_WARNING, ha,
+                            "scsi(%ld): CT pass-through-%s error "
+                            "comp_status-status=0x%x.\n",
+                            vha->host_no, type, comp_status));
+                        bsg_job->reply->result = DID_ERROR << 16;
+                        bsg_job->reply->reply_payload_rcv_len = 0;
+                }
+                DEBUG2(qla2x00_dump_buffer((uint8_t *)pkt, sizeof(*pkt)));
+        } else {
+                bsg_job->reply->result =  DID_OK << 16;;
+                bsg_job->reply->reply_payload_rcv_len =
+                    bsg_job->reply_payload.payload_len;
+                bsg_job->reply_len = 0;
+        }
+
+        dma_unmap_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
+            bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
+
+        dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list,
+            bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+
+        if (sp_bsg->type == SRB_ELS_CMD_HST || sp_bsg->type == SRB_CT_CMD)
+                kfree(sp->fcport);
+
+        kfree(sp->ctx);
+        mempool_free(sp, ha->srb_mempool);
+        bsg_job->job_done(bsg_job);
+}
+
+static void
 qla24xx_els_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
     struct sts_entry_24xx *pkt, int iocb_type)
 {
@@ -1303,6 +1383,9 @@ qla2x00_process_response_queue(struct rsp_que *rsp)
                         qla2x00_mbx_iocb_entry(vha, rsp->req,
                             (struct mbx_entry *)pkt);
                         break;
+                case CT_IOCB_TYPE:
+                        qla2x00_ct_entry(vha, rsp->req, pkt, CT_IOCB_TYPE);
+                        break;
                 default:
                         /* Type Not Supported. */
                         DEBUG4(printk(KERN_WARNING