iIDMA support requires the driver issue several additional
fabric-managegment (FM) commands per port discovered during SNS
scanning -- GFPN (Get Fabric Port Name) and GPSC (Get Port Speed
Capabilities). It has been found during testing that some
switches do not respond as *well* as expected to these commands
(silence -- no ACC nor BS_RJT). So, to handle such conditions,
allow the user the ability to indirectly disable the FM commands
by disabling iIDMA with the ql2xiidmaenable module-parameter.
Signed-off-by: Andrew Vasquez <andrew.vasquez@xxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_gbl.h | 1 +
drivers/scsi/qla2xxx/qla_init.c | 3 ++-
drivers/scsi/qla2xxx/qla_os.c | 7 +++++++
3 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 1d57ddd..f921ccd 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -62,6 +62,7 @@ extern int ql2xfdmienable;
extern int ql2xallocfwdump;
extern int ql2xextended_error_logging;
extern int ql2xqfullrampup;
+extern int ql2xiidmaenable;
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 833a642..f4cd2cd 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2559,7 +2559,8 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *ha, struct list_head *new_fcports)
} else if (qla2x00_gnn_id(ha, swl) != QLA_SUCCESS) {
kfree(swl);
swl = NULL;
- } else if (qla2x00_gfpn_id(ha, swl) == QLA_SUCCESS) {
+ } else if (ql2xiidmaenable &&
+ qla2x00_gfpn_id(ha, swl) == QLA_SUCCESS) {
qla2x00_gpsc(ha, swl);
}
}
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index e98d502..9c3a57f 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -86,6 +86,13 @@ MODULE_PARM_DESC(ql2xqfullrampup,
"depth for a device after a queue-full condition has been "
"detected. Default is 120 seconds.");
+int ql2xiidmaenable=1;
+module_param(ql2xiidmaenable, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xiidmaenable,
+ "Enables iIDMA settings "
+ "Default is 1 - perform iIDMA. 0 - no iIDMA.");
+
+
/*
* SCSI host template entry points
*/
--
1.5.6.2.292.ga9a3
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