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[SCSI] sd: Detach DIF from block integrity infrastructure

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So far we have only issued DIF commands if CONFIG_BLK_DEV_INTEGRITY is
enabled.  However, communication between initiator and target should be
independent of protection information DMA.  There are DIF-only host
adapters coming out that will be able to take advantage of this.

Move the relevant DIF bits to sd.c.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Martin K. Petersen
2009-09-18 17:33:00 -04:00
committed by James Bottomley
parent c6af404215
commit 35e1a5d90b
4 changed files with 53 additions and 80 deletions
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15
include/scsi/scsi_host.h
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@@ -798,9 +798,15 @@ static inline unsigned int scsi_host_get_prot(struct Scsi_Host *shost)
static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsigned int target_type)
{
switch (target_type) {
case 1: return shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION;
case 2: return shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION;
case 3: return shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION;
case 1:
if (shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION)
return target_type;
case 2:
if (shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION)
return target_type;
case 3:
if (shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION)
return target_type;
}
return 0;
@@ -808,13 +814,14 @@ static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsign
static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsigned int target_type)
{
#if defined(CONFIG_BLK_DEV_INTEGRITY)
switch (target_type) {
case 0: return shost->prot_capabilities & SHOST_DIX_TYPE0_PROTECTION;
case 1: return shost->prot_capabilities & SHOST_DIX_TYPE1_PROTECTION;
case 2: return shost->prot_capabilities & SHOST_DIX_TYPE2_PROTECTION;
case 3: return shost->prot_capabilities & SHOST_DIX_TYPE3_PROTECTION;
}
#endif
return 0;
}