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Commit e5896bd5 authored by Andrew Vasquez's avatar Andrew Vasquez Committed by James Bottomley
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[SCSI] qla2xxx: Allow the user the option of disabling iIDMA. 



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: default avatarAndrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 711c1d91

drivers/scsi/qla2xxx/qla_gbl.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/qla2xxx/qla_init.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

		}

	}

drivers/scsi/qla2xxx/qla_os.c

+7 −0
Original line number Diff line number Diff line
@@ -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

 */