diff options
| author |   Martin K. Petersen <martin.petersen@oracle.com> | 2009-09-18 17:33:00 -0400 |
|---|---|---|
| committer |   James Bottomley <James.Bottomley@suse.de> | 2009-10-02 09:46:39 -0500 |
| commit | 35e1a5d90b66487d754ef2f2dcbf1007f806d921 (patch) | |
| tree | 964511498993ed8fe0c1604ab74ac7a3db9361ba /include/scsi/scsi_host.h | |
| parent | [SCSI] Deprecate SCSI_PROT_*_CONVERT operations (diff) | |
| download | linux-dev-35e1a5d90b66487d754ef2f2dcbf1007f806d921.tar.xz linux-dev-35e1a5d90b66487d754ef2f2dcbf1007f806d921.zip | |
[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.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index b62a097b3ecb..6e728b176904 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; } |