Commit 2da52737 authored Jun 02, 2017 by Quinn Tran Committed by Martin K. Petersen Jun 12, 2017

scsi: qla2xxx: Accelerate SCSI BUSY status generation in target mode



Accelerate generation of SCSI busy to let initiators slow down when
target is running low in resources.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent 3a33dc95

drivers/scsi/qla2xxx/qla_init.c

+11 −2

Original line number	Diff line number	Diff line
		@@ -7374,10 +7374,19 @@ qla81xx_update_fw_options(scsi_qla_host_t *vha)
		}

		if (qla_tgt_mode_enabled(vha) \|\|
		qla_dual_mode_enabled(vha))
		qla_dual_mode_enabled(vha)) {
		/* FW auto send SCSI status during */
		ha->fw_options[1] \|= BIT_8;
		ha->fw_options[10] \|= (u16)SAM_STAT_BUSY << 8;

		/* FW perform Exchange validation */
		ha->fw_options[2] \|= BIT_4;
		else
		} else {
		ha->fw_options[1] &= ~BIT_8;
		ha->fw_options[10] &= 0x00ff;

		ha->fw_options[2] &= ~BIT_4;
		}

		if (ql2xetsenable) {
		/* Enable ETS Burst. */

drivers/scsi/qla2xxx/qla_mbx.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1048,6 +1048,8 @@ qla2x00_set_fw_options(scsi_qla_host_t vha, uint16_t fwopts)
		mcp->in_mb = MBX_0;
		if (IS_FWI2_CAPABLE(vha->hw)) {
		mcp->in_mb \|= MBX_1;
		mcp->mb[10] = fwopts[10];
		mcp->out_mb \|= MBX_10;
		} else {
		mcp->mb[10] = fwopts[10];
		mcp->mb[11] = fwopts[11];