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authorMartin K. Petersen <martin.petersen@oracle.com>2009-09-18 17:33:00 -0400
committerJames Bottomley <James.Bottomley@suse.de>2009-10-02 09:46:39 -0500
commit35e1a5d90b66487d754ef2f2dcbf1007f806d921 (patch)
tree964511498993ed8fe0c1604ab74ac7a3db9361ba /include/scsi/scsi_host.h
parentc6af404215bab0d333accbb497f835d10cb0050c (diff)
downloadop-kernel-dev-35e1a5d90b66487d754ef2f2dcbf1007f806d921.zip
op-kernel-dev-35e1a5d90b66487d754ef2f2dcbf1007f806d921.tar.gz
[SCSI] sd: Detach DIF from block integrity infrastructure
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>
Diffstat (limited to 'include/scsi/scsi_host.h')
-rw-r--r--include/scsi/scsi_host.h15
1 files changed, 11 insertions, 4 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index b62a097..6e728b1 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -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;
}
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