diff options
author | Paul Mackerras <paulus@samba.org> | 2008-05-09 20:12:06 +1000 |
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committer | Paul Mackerras <paulus@samba.org> | 2008-05-09 20:12:06 +1000 |
commit | 2a5f2e3e6cd1ce9fb3f8b186b6bc9aa1f1497a92 (patch) | |
tree | b2306840f227972a7c9d4a2b75e516fe81358ce8 /include/scsi/scsi.h | |
parent | 02539d71fa98d5737bb668b02286c76241e4bac9 (diff) | |
parent | 78be76476a34a77f0ea9db2f78ba46a2b0fd5ab5 (diff) |
Merge branch 'for-2.6.26' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
Diffstat (limited to 'include/scsi/scsi.h')
-rw-r--r-- | include/scsi/scsi.h | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 1f74bcd603fe..32742c4563de 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -30,13 +30,6 @@ #endif /* - * SCSI command lengths - */ - -extern const unsigned char scsi_command_size[8]; -#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7] - -/* * Special value for scanning to specify scanning or rescanning of all * possible channels, (target) ids, or luns on a given shost. */ @@ -109,6 +102,7 @@ extern const unsigned char scsi_command_size[8]; #define MODE_SENSE_10 0x5a #define PERSISTENT_RESERVE_IN 0x5e #define PERSISTENT_RESERVE_OUT 0x5f +#define VARIABLE_LENGTH_CMD 0x7f #define REPORT_LUNS 0xa0 #define MAINTENANCE_IN 0xa3 #define MOVE_MEDIUM 0xa5 @@ -136,6 +130,38 @@ extern const unsigned char scsi_command_size[8]; #define ATA_12 0xa1 /* 12-byte pass-thru */ /* + * SCSI command lengths + */ + +#define SCSI_MAX_VARLEN_CDB_SIZE 260 + +/* defined in T10 SCSI Primary Commands-2 (SPC2) */ +struct scsi_varlen_cdb_hdr { + u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ + u8 control; + u8 misc[5]; + u8 additional_cdb_length; /* total cdb length - 8 */ + __be16 service_action; + /* service specific data follows */ +}; + +static inline unsigned +scsi_varlen_cdb_length(const void *hdr) +{ + return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; +} + +extern const unsigned char scsi_command_size_tbl[8]; +#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] + +static inline unsigned +scsi_command_size(const unsigned char *cmnd) +{ + return (cmnd[0] == VARIABLE_LENGTH_CMD) ? + scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); +} + +/* * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft * T10/1561-D Revision 4 Draft dated 7th November 2002. */ |