diff --git a/modified/scsi/scsi.h b/modified/scsi/scsi.h
index 667ee0b..9061f89 100644
--- a/modified/scsi/scsi.h
+++ b/modified/scsi/scsi.h
@@ -22,25 +22,6 @@
 };
 
 /*
- * The maximum number of SG segments that we will put inside a
- * scatterlist (unless chaining is used). Should ideally fit inside a
- * single page, to avoid a higher order allocation.  We could define this
- * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
- * minimum value is 32
- */
-#define SCSI_MAX_SG_SEGMENTS	128
-
-/*
- * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
- * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
- */
-#ifdef CONFIG_ARCH_HAS_SG_CHAIN
-#define SCSI_MAX_SG_CHAIN_SEGMENTS	2048
-#else
-#define SCSI_MAX_SG_CHAIN_SEGMENTS	SCSI_MAX_SG_SEGMENTS
-#endif
-
-/*
  * DIX-capable adapters effectively support infinite chaining for the
  * protection information scatterlist
  */
diff --git a/modified/scsi/scsi_proto.h b/modified/scsi/scsi_proto.h
index 4cbea69..8412026 100644
--- a/modified/scsi/scsi_proto.h
+++ b/modified/scsi/scsi_proto.h
@@ -115,6 +115,8 @@
 #define VERIFY_16	      0x8f
 #define SYNCHRONIZE_CACHE_16  0x91
 #define WRITE_SAME_16	      0x93
+#define ZBC_OUT		      0x94
+#define ZBC_IN		      0x95
 #define SERVICE_ACTION_BIDIRECTIONAL 0x9d
 #define SERVICE_ACTION_IN_16  0x9e
 #define SERVICE_ACTION_OUT_16 0x9f
@@ -144,6 +146,13 @@
 #define MO_SET_PRIORITY       0x0e
 #define MO_SET_TIMESTAMP      0x0f
 #define MO_MANAGEMENT_PROTOCOL_OUT 0x10
+/* values for ZBC_IN */
+#define ZI_REPORT_ZONES	      0x00
+/* values for ZBC_OUT */
+#define ZO_CLOSE_ZONE	      0x01
+#define ZO_FINISH_ZONE	      0x02
+#define ZO_OPEN_ZONE	      0x03
+#define ZO_RESET_WRITE_POINTER 0x04
 /* values for variable length command */
 #define XDREAD_32	      0x03
 #define XDWRITE_32	      0x04
@@ -281,5 +290,17 @@
 };
 #endif /* __KERNEL__ */
 
+/* SPC asymmetric access states */
+#define SCSI_ACCESS_STATE_OPTIMAL     0x00
+#define SCSI_ACCESS_STATE_ACTIVE      0x01
+#define SCSI_ACCESS_STATE_STANDBY     0x02
+#define SCSI_ACCESS_STATE_UNAVAILABLE 0x03
+#define SCSI_ACCESS_STATE_LBA         0x04
+#define SCSI_ACCESS_STATE_OFFLINE     0x0e
+#define SCSI_ACCESS_STATE_TRANSITIONING 0x0f
+
+/* Values for REPORT TARGET GROUP STATES */
+#define SCSI_ACCESS_STATE_MASK        0x0f
+#define SCSI_ACCESS_STATE_PREFERRED   0x80
 
 #endif /* _SCSI_PROTO_H_ */