qla2xxx: Improve RSCN handling in driver

Current code blindly does State Change Registration when
the link is up. Move SCR behind fabric scan, so that arbitrated
loop scan would not get erroneous error message.

Some of the other improvements are as follows

- Add session deletion for TPRLO and send acknowledgment for TPRLO.
- Enable FW option to move ABTS, RIDA & PUREX from RSPQ to ATIOQ.
- Save NPort ID early in link init.
- Move ABTS & RIDA to ATIOQ helps in keeping command ordering and
  link up sequence ordering.
- Save Nport ID and update VP map so that SCSI CMD/ATIO won't be dropped.
- fcport alloc does the initializes memory to zero. Remove memset to
  zero since It might corrupt link list.
- Turn off Registration for State Change MB in loop mode.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 4ff30d136924..3881790e80da 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2226,6 +2226,13 @@ enum fcport_mgt_event {
 	FCME_DELETE_DONE,
 };
 
+enum rscn_addr_format {
+	RSCN_PORT_ADDR,
+	RSCN_AREA_ADDR,
+	RSCN_DOM_ADDR,
+	RSCN_FAB_ADDR,
+};
+
 /*
  * Fibre channel port structure.
  */
@@ -3956,7 +3963,7 @@ typedef struct scsi_qla_host {
 #define FCOE_CTX_RESET_NEEDED	18	/* Initiate FCoE context reset */
 #define MPI_RESET_NEEDED	19	/* Initiate MPI FW reset */
 #define ISP_QUIESCE_NEEDED	20	/* Driver need some quiescence */
-#define SCR_PENDING		21	/* SCR in target mode */
+#define FREE_BIT 21
 #define PORT_UPDATE_NEEDED	22
 #define FX00_RESET_RECOVERY	23
 #define FX00_TARGET_SCAN	24
@@ -4010,7 +4017,9 @@ typedef struct scsi_qla_host {
 	/* list of commands waiting on workqueue */
 	struct list_head	qla_cmd_list;
 	struct list_head	qla_sess_op_cmd_list;
+	struct list_head	unknown_atio_list;
 	spinlock_t		cmd_list_lock;
+	struct delayed_work	unknown_atio_work;
 
 	/* Counter to detect races between ELS and RSCN events */
 	atomic_t		generation_tick;