From: Quinn Tran <quinn.tran@xxxxxxxxxx> Add option to tell FW to reserve 1/2 of emergency exchanges for ELS. Signed-off-by: Quinn Tran <quinn.tran@xxxxxxxxxx> Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx> --- 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 cf1f1a3baf21..aabd49ef95a3 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -148,6 +148,7 @@ extern int ql2xuctrlirq; extern int ql2xnvmeenable; extern int ql2xautodetectsfp; extern int ql2xenablemsix; +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 728c66f34666..39d1edc6c2b1 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -3348,6 +3348,12 @@ 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 e1761bd552fe..487e1affacf4 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -277,6 +277,12 @@ MODULE_PARM_DESC(ql2xenablemsix, " 1 -- enable MSI-X interrupt mechanism.\n" " 2 -- enable MSI interrupt mechanism.\n"); +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
