From: "Martin K. Petersen" <martin.petersen@oracle.com>
Date: Fri, 21 Dec 2018 09:33:44 -0800
Subject: scsi: qla2xxx: Add protection mask module parameters
Patch-mainline: v5.1-rc1
Git-commit: 7855d2ba1172d716d96a628af7c5bafa5725ac57
References: bsc#1123034 bsc#1131304 bsc#1127988 bsc#1136215
Allow user to selectively enable/disable DIF/DIX protection
capabilities mask.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/qla2xxx/qla_os.c | 36 ++++++++++++++++++++++++++++--------
1 file changed, 28 insertions(+), 8 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -285,6 +285,20 @@ MODULE_PARM_DESC(qla2xuseresexchforels,
"Reserve 1/2 of emergency exchanges for ELS.\n"
" 0 (default): disabled");
+int ql2xprotmask;
+module_param(ql2xprotmask, int, 0644);
+MODULE_PARM_DESC(ql2xprotmask,
+ "Override DIF/DIX protection capabilities mask\n"
+ "Default is 0 which sets protection mask based on "
+ "capabilities reported by HBA firmware.\n");
+
+int ql2xprotguard;
+module_param(ql2xprotguard, int, 0644);
+MODULE_PARM_DESC(ql2xprotguard, "Override choice of DIX checksum\n"
+ " 0 -- Let HBA firmware decide\n"
+ " 1 -- Force T10 CRC\n"
+ " 2 -- Force IP checksum\n");
+
/*
* SCSI host template entry points
*/
@@ -3349,13 +3363,16 @@ skip_dpc:
"Registering for DIF/DIX type 1 and 3 protection.\n");
if (ql2xenabledif == 1)
prot = SHOST_DIX_TYPE0_PROTECTION;
- scsi_host_set_prot(host,
- prot | SHOST_DIF_TYPE1_PROTECTION
- | SHOST_DIF_TYPE2_PROTECTION
- | SHOST_DIF_TYPE3_PROTECTION
- | SHOST_DIX_TYPE1_PROTECTION
- | SHOST_DIX_TYPE2_PROTECTION
- | SHOST_DIX_TYPE3_PROTECTION);
+ if (ql2xprotmask)
+ scsi_host_set_prot(host, ql2xprotmask);
+ else
+ scsi_host_set_prot(host,
+ prot | SHOST_DIF_TYPE1_PROTECTION
+ | SHOST_DIF_TYPE2_PROTECTION
+ | SHOST_DIF_TYPE3_PROTECTION
+ | SHOST_DIX_TYPE1_PROTECTION
+ | SHOST_DIX_TYPE2_PROTECTION
+ | SHOST_DIX_TYPE3_PROTECTION);
guard = SHOST_DIX_GUARD_CRC;
@@ -3363,7 +3380,10 @@ skip_dpc:
(ql2xenabledif > 1 || IS_PI_DIFB_DIX0_CAPABLE(ha)))
guard |= SHOST_DIX_GUARD_IP;
- scsi_host_set_guard(host, guard);
+ if (ql2xprotguard)
+ scsi_host_set_guard(host, ql2xprotguard);
+ else
+ scsi_host_set_guard(host, guard);
} else
base_vha->flags.difdix_supported = 0;
}