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[SCSI] lpfc 8.3.39: Fix driver issues with large s/g lists for BlockGuard

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Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart
2013-04-17 20:16:15 -04:00
committed by James Bottomley
parent 09294d4623
commit 96f7077f67
6 changed files with 264 additions and 136 deletions
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15
drivers/scsi/lpfc/lpfc_attr.c
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@@ -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,