#include <linux/types.h>
/*
- * The maximum sg list length SCSI can cope with
- * (currently must be a power of 2 between 32 and 256)
+ * 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_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
+#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 ARCH_HAS_SG_CHAIN
+#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
+#else
+#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
+#endif
/*
* SCSI command lengths
#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
/*
- * SCSI device types
+ * Special value for scanning to specify scanning or rescanning of all
+ * possible channels, (target) ids, or luns on a given shost.
*/
-
-#define MAX_SCSI_DEVICE_CODE 14
-extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
+#define SCAN_WILD_CARD ~0
/*
* SCSI opcodes
#define READ_TOC 0x43
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
+#define XDWRITEREAD_10 0x53
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
#define RELEASE_10 0x57
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define REPORT_LUNS 0xa0
+#define MAINTENANCE_IN 0xa3
#define MOVE_MEDIUM 0xa5
#define EXCHANGE_MEDIUM 0xa6
#define READ_12 0xa8
#define SERVICE_ACTION_IN 0x9e
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
+/* values for maintenance in */
+#define MI_REPORT_TARGET_PGS 0x0a
+/* Values for T10/04-262r7 */
+#define ATA_16 0x85 /* 16-byte pass-thru */
+#define ATA_12 0xa1 /* 12-byte pass-thru */
/*
* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
/*
* DEVICE TYPES
+ * Please keep them in 0x%02x format for $MODALIAS to work
*/
#define TYPE_DISK 0x00
* - treated as TYPE_DISK */
#define TYPE_MEDIUM_CHANGER 0x08
#define TYPE_COMM 0x09 /* Communications device */
-#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
#define TYPE_RAID 0x0c
+#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
+#define TYPE_RBC 0x0e
#define TYPE_NO_LUN 0x7f
+/* Returns a human-readable name for the device */
+extern const char * scsi_device_type(unsigned type);
+
/*
* standard mode-select header prepended to all mode-select commands
*/
/* Used to obtain the PCI location of a device */
#define SCSI_IOCTL_GET_PCI 0x5387
+/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
+static inline __u32 scsi_to_u32(__u8 *ptr)
+{
+ return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
+}
+
#endif /* _SCSI_SCSI_H */