Prepare for adding code that will fill in and parse this data structure.
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
include/scsi/scsi_proto.h | 40 +++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index 07d65c1f59db..4e3691cb67da 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -10,6 +10,7 @@
#ifndef _SCSI_PROTO_H_
#define _SCSI_PROTO_H_
+#include <linux/build_bug.h>
#include <linux/types.h>
/*
@@ -275,6 +276,45 @@ struct scsi_lun {
__u8 scsi_lun[8];
};
+/* SBC-5 IO advice hints group descriptor */
+struct scsi_io_group_descriptor {
+#if defined(__BIG_ENDIAN)
+ u8 io_advice_hints_mode: 2;
+ u8 reserved1: 3;
+ u8 st_enble: 1;
+ u8 cs_enble: 1;
+ u8 ic_enable: 1;
+#elif defined(__LITTLE_ENDIAN)
+ u8 ic_enable: 1;
+ u8 cs_enble: 1;
+ u8 st_enble: 1;
+ u8 reserved1: 3;
+ u8 io_advice_hints_mode: 2;
+#else
+#error
+#endif
+ u8 reserved2[3];
+ /* Logical block markup descriptor */
+#if defined(__BIG_ENDIAN)
+ u8 acdlu: 1;
+ u8 reserved3: 1;
+ u8 rlbsr: 2;
+ u8 lbm_descriptor_type: 4;
+#elif defined(__LITTLE_ENDIAN)
+ u8 lbm_descriptor_type: 4;
+ u8 rlbsr: 2;
+ u8 reserved3: 1;
+ u8 acdlu: 1;
+#else
+#error
+#endif
+ u8 params[2];
+ u8 reserved4;
+ u8 reserved5[8];
+};
+
+static_assert(sizeof(struct scsi_io_group_descriptor) == 16);
+
/* SPC asymmetric access states */
#define SCSI_ACCESS_STATE_OPTIMAL 0x00
#define SCSI_ACCESS_STATE_ACTIVE 0x01
