From 35e1a5d90b66487d754ef2f2dcbf1007f806d921 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 18 Sep 2009 17:33:00 -0400 Subject: [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 Signed-off-by: James Bottomley --- include/scsi/scsi_host.h | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index b62a097b3ec..6e728b17690 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; } -- cgit v1.2.3