[PATCH 14/43] qla2xxx: Add option for use reserve exch for ELS

Himanshu Madhani
2017-12-20T06:57:09Z

Add option to tell FW to reserve 1/2 of emergency exchanges for ELS.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
---
drivers/scsi/qla2xxx/qla_gbl.h | 1 +
drivers/scsi/qla2xxx/qla_init.c | 6 ++++++
drivers/scsi/qla2xxx/qla_os.c | 6 ++++++
3 files changed, 13 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index fb1c9ffdc05a..88c7746c023a 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -149,6 +149,7 @@ extern int ql2xnvmeenable;
extern int ql2xautodetectsfp;
extern int ql2xenablemsix;
extern int ql2xtrackfwres;
+extern int qla2xuseresexchforels;

extern int qla2x00_loop_reset(scsi_qla_host_t *);
extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 61b74fd220a3..6223dfe20767 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -3387,6 +3387,12 @@ qla24xx_update_fw_options(scsi_qla_host_t *vha)
ha->fw_options[2] |= BIT_4;
else
ha->fw_options[2] &= ~BIT_4;
+
+ /* Reserve 1/2 of emergency exchanges for ELS.*/
+ if (qla2xuseresexchforels)
+ ha->fw_options[2] |= BIT_8;
+ else
+ ha->fw_options[2] &= ~BIT_8;
}

ql_dbg(ql_dbg_init, vha, 0x00e8,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 66e6fe73a035..fd107c4feda5 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -282,6 +282,12 @@ module_param(ql2xtrackfwres, int, 0444);
MODULE_PARM_DESC(ql2xtrackfwres,
"Track FW resource. 0(default): disabled");

+int qla2xuseresexchforels;
+module_param(qla2xuseresexchforels, int, 0444);
+MODULE_PARM_DESC(qla2xuseresexchforels,
+ "Reserve 1/2 of emergency exchanges for ELS.\n"
+ " 0 (default): disabled");
+
/*
* SCSI host template entry points
*/
--
2.12.0