[SCSI] bnx2fc: Enable REC & CONF support for the session

Based on PRLI response, identify if the target is FCP-2 (seq level error
recovery) capable, and appropriately set the corresponding CONF, REC flags when
offloading the session.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

4 files changed, 24 insertions, 1 deletions

diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h
index 6012317c1f2f..d38dcc7f1047 100644
--- a/drivers/scsi/bnx2fc/bnx2fc.h
+++ b/drivers/scsi/bnx2fc/bnx2fc.h
@@ -244,9 +244,11 @@ struct bnx2fc_rport {
         struct fc_rport_priv *rdata;
         void __iomem *ctx_base;
 #define DPM_TRIGER_TYPE         0x40
+        u32 io_timeout;
         u32 fcoe_conn_id;
         u32 context_id;
         u32 sid;
+        int dev_type;
 
         unsigned long flags;
 #define BNX2FC_FLAG_SESSION_READY       0x1
diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
index ee1674b794b1..fa263b5902e1 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
@@ -279,6 +279,18 @@ int bnx2fc_send_session_ofld_req(struct fcoe_port *port,
         ofld_req3.flags |= (((rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
                              FCOE_KWQE_CONN_OFFLOAD3_B_CONT_INCR_SEQ_CNT_SHIFT);
 
+        /*
+         * Info from PRLI response, this info is used for sequence level error
+         * recovery support
+         */
+        if (tgt->dev_type == TYPE_TAPE) {
+                ofld_req3.flags |= 1 <<
+                                    FCOE_KWQE_CONN_OFFLOAD3_B_CONF_REQ_SHIFT;
+                ofld_req3.flags |= (((rdata->flags & FC_RP_FLAGS_REC_SUPPORTED)
+                                    ? 1 : 0) <<
+                                    FCOE_KWQE_CONN_OFFLOAD3_B_REC_VALID_SHIFT);
+        }
+
         /* vlan flag */
         ofld_req3.flags |= (interface->vlan_enabled <<
                             FCOE_KWQE_CONN_OFFLOAD3_B_VLAN_FLAG_SHIFT);
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index e711ea3dd900..72940b8625bd 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -1862,7 +1862,8 @@ static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
         }
 
         /* Time IO req */
-        bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
+        if (tgt->io_timeout)
+                bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
         /* Obtain free SQ entry */
         bnx2fc_add_2_sq(tgt, xid);
 
diff --git a/drivers/scsi/bnx2fc/bnx2fc_tgt.c b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
index 263c2678ff62..7eff269d4c41 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_tgt.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
@@ -353,6 +353,14 @@ static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
         tgt->rq_cons_idx = 0;
         atomic_set(&tgt->num_active_ios, 0);
 
+        if (rdata->flags & FC_RP_FLAGS_RETRY) {
+                tgt->dev_type = TYPE_TAPE;
+                tgt->io_timeout = 0; /* use default ULP timeout */
+        } else {
+                tgt->dev_type = TYPE_DISK;
+                tgt->io_timeout = BNX2FC_IO_TIMEOUT;
+        }
+
         /* initialize sq doorbell */
         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<