[SCSI] qla2xxx: Support for asynchronous TM and Marker IOCBs.

Currently we can only issue the task management (TM)
commands via the mailbox mechanism. This is a limitation,
since only one mailbox command can be issued at a time.
The purpose of this effort is to provide support for
issuing and processing the respose to TM and Marker
IOCBs asynchronously. Towards achieving this, the
consolidated srb architecture that is currently used for
BSG and IOCB/Logio commands has been enhanced and used.

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

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 166bb2045fd4..eed71ea1d947 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1161,6 +1161,99 @@ logio_done:
 	lio->done(sp);
 }
 
+static void
+qla24xx_tm_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
+    struct tsk_mgmt_entry *tsk)
+{
+	const char func[] = "TMF-IOCB";
+	const char *type;
+	fc_port_t *fcport;
+	srb_t *sp;
+	struct srb_iocb *iocb;
+	struct srb_ctx *ctx;
+	struct sts_entry_24xx *sts = (struct sts_entry_24xx *)tsk;
+	int error = 1;
+
+	sp = qla2x00_get_sp_from_handle(vha, func, req, tsk);
+	if (!sp)
+		return;
+
+	ctx = sp->ctx;
+	iocb = ctx->u.iocb_cmd;
+	type = ctx->name;
+	fcport = sp->fcport;
+
+	if (sts->entry_status) {
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error - entry-status(%x).\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->entry_status));
+	} else if (sts->comp_status != __constant_cpu_to_le16(CS_COMPLETE)) {
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error - completion status(%x).\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->comp_status));
+	} else if (!(le16_to_cpu(sts->scsi_status) &
+	    SS_RESPONSE_INFO_LEN_VALID)) {
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error - no response info(%x).\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->scsi_status));
+	} else if (le32_to_cpu(sts->rsp_data_len) < 4) {
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error - not enough response(%d).\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->rsp_data_len));
+	} else if (sts->data[3]) {
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error - response(%x).\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->data[3]));
+	} else {
+		error = 0;
+	}
+
+	if (error) {
+		iocb->u.tmf.data = error;
+		DEBUG2(qla2x00_dump_buffer((uint8_t *)sts, sizeof(*sts)));
+	}
+
+	iocb->done(sp);
+}
+
+static void
+qla24xx_marker_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
+    struct mrk_entry_24xx *mrk)
+{
+	const char func[] = "MRK-IOCB";
+	const char *type;
+	fc_port_t *fcport;
+	srb_t *sp;
+	struct srb_iocb *iocb;
+	struct srb_ctx *ctx;
+	struct sts_entry_24xx *sts = (struct sts_entry_24xx *)mrk;
+
+	sp = qla2x00_get_sp_from_handle(vha, func, req, mrk);
+	if (!sp)
+		return;
+
+	ctx = sp->ctx;
+	iocb = ctx->u.iocb_cmd;
+	type = ctx->name;
+	fcport = sp->fcport;
+
+	if (sts->entry_status) {
+		iocb->u.marker.data = 1;
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld:%x): Async-%s error entry - entry-status=%x.\n",
+		    fcport->vha->host_no, sp->handle, type,
+		    sts->entry_status));
+		DEBUG2(qla2x00_dump_buffer((uint8_t *)mrk, sizeof(*sts)));
+	}
+
+	iocb->done(sp);
+}
+
 /**
  * qla2x00_process_response_queue() - Process response queue entries.
  * @ha: SCSI driver HA context
@@ -1225,6 +1318,7 @@ qla2x00_process_response_queue(struct rsp_que *rsp)
 		case MBX_IOCB_TYPE:
 			qla2x00_mbx_iocb_entry(vha, rsp->req,
 			    (struct mbx_entry *)pkt);
+			break;
 		default:
 			/* Type Not Supported. */
 			DEBUG4(printk(KERN_WARNING
@@ -1751,6 +1845,14 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
 			qla24xx_logio_entry(vha, rsp->req,
 			    (struct logio_entry_24xx *)pkt);
 			break;
+		case TSK_MGMT_IOCB_TYPE:
+			qla24xx_tm_iocb_entry(vha, rsp->req,
+			    (struct tsk_mgmt_entry *)pkt);
+			break;
+		case MARKER_TYPE:
+			qla24xx_marker_iocb_entry(vha, rsp->req,
+			    (struct mrk_entry_24xx *)pkt);
+			break;
                 case CT_IOCB_TYPE:
 			qla24xx_els_ct_entry(vha, rsp->req, pkt, CT_IOCB_TYPE);
 			clear_bit(MBX_INTERRUPT, &vha->hw->mbx_cmd_flags);