[SCSI] sd: Identify DIF protection type and application tag ownership

[mirror_ubuntu-kernels.git] / drivers / scsi / sd.h

diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 03a3d45cfa4237c26a545c209e1e2c8e30a1903c..86b18d4170fe240ad14ce796270db9c45cd2f373 100644 (file)
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -41,7 +41,9 @@ struct scsi_disk {
        u32             index;
        u8              media_present;
        u8              write_prot;
+       u8              protection_type;/* Data Integrity Field */
        unsigned        previous_state : 1;
+       unsigned        ATO : 1;        /* state of disk ATO bit */
        unsigned        WCE : 1;        /* state of disk WCE bit */
        unsigned        RCD : 1;        /* state of disk RCD bit, unused */
        unsigned        DPOFUA : 1;     /* state of disk DPOFUA bit */
@@ -59,4 +61,25 @@ static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
                    (sdsk)->disk->disk_name, ##a) :                     \
        sdev_printk(prefix, (sdsk)->device, fmt, ##a)
 
+/*
+ * A DIF-capable target device can be formatted with different
+ * protection schemes.  Currently 0 through 3 are defined:
+ *
+ * Type 0 is regular (unprotected) I/O
+ *
+ * Type 1 defines the contents of the guard and reference tags
+ *
+ * Type 2 defines the contents of the guard and reference tags and
+ * uses 32-byte commands to seed the latter
+ *
+ * Type 3 defines the contents of the guard tag only
+ */
+
+enum sd_dif_target_protection_types {
+       SD_DIF_TYPE0_PROTECTION = 0x0,
+       SD_DIF_TYPE1_PROTECTION = 0x1,
+       SD_DIF_TYPE2_PROTECTION = 0x2,
+       SD_DIF_TYPE3_PROTECTION = 0x3,
+};
+
 #endif /* _SCSI_DISK_H */