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| author |   James Smart <james.smart@emulex.com> | 2013-04-17 20:16:15 -0400 |
|---|---|---|
| committer |   James Bottomley <JBottomley@Parallels.com> | 2013-05-02 12:46:20 -0700 |
| commit | 96f7077f671254e957a2815e54bb20e8d50f0bbc (patch) | |
| tree | 491594535761bfcddeea83fbc56976211d8cb961 /drivers/scsi/lpfc/lpfc_attr.c | |
| parent | [SCSI] lpfc 8.3.39: Fix driver issues with large lpfc_sg_seg_cnt values (diff) | |
| download | linux-dev-96f7077f671254e957a2815e54bb20e8d50f0bbc.tar.xz linux-dev-96f7077f671254e957a2815e54bb20e8d50f0bbc.zip | |
[SCSI] lpfc 8.3.39: Fix driver issues with large s/g lists for BlockGuard
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_attr.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_attr.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index ad5b0f94a98d..3b10aa5745b5 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -4073,16 +4073,23 @@ MODULE_PARM_DESC(lpfc_delay_discovery, /* * lpfc_sg_seg_cnt - Initial Maximum DMA Segment Count - * This value can be set to values between 64 and 256. The default value is + * This value can be set to values between 64 and 4096. The default value is * 64, but may be increased to allow for larger Max I/O sizes. The scsi layer * will be allowed to request I/Os of sizes up to (MAX_SEG_COUNT * SEG_SIZE). + * Because of the additional overhead involved in setting up T10-DIF, + * this parameter will be limited to 128 if BlockGuard is enabled under SLI4 + * and will be limited to 512 if BlockGuard is enabled under SLI3. */ LPFC_ATTR_R(sg_seg_cnt, LPFC_DEFAULT_SG_SEG_CNT, LPFC_DEFAULT_SG_SEG_CNT, LPFC_MAX_SG_SEG_CNT, "Max Scatter Gather Segment Count"); -LPFC_ATTR_R(prot_sg_seg_cnt, LPFC_DEFAULT_PROT_SG_SEG_CNT, - LPFC_DEFAULT_PROT_SG_SEG_CNT, LPFC_MAX_PROT_SG_SEG_CNT, - "Max Protection Scatter Gather Segment Count"); +/* + * This parameter will be depricated, the driver cannot limit the + * protection data s/g list. + */ +LPFC_ATTR_R(prot_sg_seg_cnt, LPFC_DEFAULT_SG_SEG_CNT, + LPFC_DEFAULT_SG_SEG_CNT, LPFC_MAX_SG_SEG_CNT, + "Max Protection Scatter Gather Segment Count"); struct device_attribute *lpfc_hba_attrs[] = { &dev_attr_bg_info, |