Commit d154f350 authored by Arun Easi's avatar Arun Easi Committed by Christoph Hellwig
Browse files

qla2xxx: Enable SLER conditionally in target mode. 



Sequence level error recovery (aka FC Tape) is not really required
for disk devices. On heavily loaded system, with slow turn around,
a bunch of status enquiries using REC puts additional burden to the
target, so just turn off SLER by default.

Signed-off-by: default avatarArun Easi <arun.easi@qlogic.com>
Signed-off-by: default avatarSaurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 667024a3

drivers/scsi/qla2xxx/qla_target.c

+19 −4
Original line number Diff line number Diff line
@@ -42,6 +42,11 @@ 
#include "qla_def.h"

#include "qla_target.h"



static int ql2xtgt_tape_enable;

module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);

MODULE_PARM_DESC(ql2xtgt_tape_enable,

		"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");



static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;

module_param(qlini_mode, charp, S_IRUGO);

MODULE_PARM_DESC(qlini_mode,
@@ -5172,8 +5177,13 @@ qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);

		/* Enable initial LIP */

		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);

		/* Enable FC tapes support */

		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);

		if (ql2xtgt_tape_enable)

			/* Enable FC Tape support */

			nv->firmware_options_2 |= cpu_to_le32(BIT_12);

		else

			/* Disable FC Tape support */

			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);



		/* Disable Full Login after LIP */

		nv->host_p &= __constant_cpu_to_le32(~BIT_10);

		/* Enable target PRLI control */
@@ -5255,8 +5265,13 @@ qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);

		/* Enable initial LIP */

		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);

		/* Enable FC tapes support */

		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);

		if (ql2xtgt_tape_enable)

			/* Enable FC tape support */

			nv->firmware_options_2 |= cpu_to_le32(BIT_12);

		else

			/* Disable FC tape support */

			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);



		/* Disable Full Login after LIP */

		nv->host_p &= __constant_cpu_to_le32(~BIT_10);

		/* Enable target PRLI control */

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