/* * scsi.h Copyright (C) 1992 Drew Eckhardt * generic SCSI package header file by * Drew Eckhardt * * <drew@colorado.edu> */ #ifndef _SCSI_H #define _SCSI_H /* $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/scsi.h,v 1.1 1992/04/24 18:01:50 root Exp root $ For documentation on the OPCODES, MESSAGES, and SENSE values, please consult the SCSI standard. */ /* SCSI opcodes */ #define TEST_UNIT_READY 0x00 #define REZERO_UNIT 0x01 #define REQUEST_SENSE 0x03 #define FORMAT_UNIT 0x04 #define REASSIGN_BLOCKS 0x07 #define READ_6 0x08 #define WRITE_6 0x0a #define SEEK_6 0x0b #define INQUIRY 0x12 #define MODE_SELECT 0x15 #define RESERVE 0x16 #define RELEASE 0x17 #define COPY 0x18 #define MODE_SENSE 0x1a #define START_STOP 0x1b #define RECIEVE_DAIGNOSTIC 0x1c #define SEND_DIAGNOSTIC 0x1d #define ALLOW_MEDIUM_REMOVAL 0x1e #define READ_CAPACITY 0x25 #define READ_10 0x28 #define WRITE_10 0x2a #define SEEK_10 0x2b #define WRITE_VERIFY 0x2e #define VERIFY 0x2f #define SEARCH_HIGH 0x30 #define SEARCH_EQUAL 0x31 #define SEARCH_LOW 0x32 #define SET_LIMITS 0x33 #define COMPARE 0x39 #define COPY_VERIFY 0x3a #define COMMAND_SIZE(opcode) ((opcode) ? ((opcode) > 0x20 ? 10 : 6) : 0) /* MESSAGE CODES */ #define COMMAND_COMPLETE 0x00 #define EXTENDED_MESSAGE 0x01 #define SAVE_POINTERS 0x02 #define RESTORE_POINTERS 0x03 #define DISCONNECT 0x04 #define INITIATOR_ERROR 0x05 #define ABORT 0x06 #define MESSAGE_REJECT 0x07 #define NOP 0x08 #define MSG_PARITY_ERROR 0x09 #define LINKED_CMD_COMPLETE 0x0a #define LINKED_FLG_CMD_COMPLETE 0x0b #define BUS_DEVICE_RESET 0x0c #define IDENTIFY 0x80 /* Status codes */ #define GOOD 0x00 #define CHECK_CONDITION 0x01 #define CONDITION_GOOD 0x02 #define BUSY 0x04 #define INTERMEDIATE_GOOD 0x08 #define INTERMEDIATE_C_GOOD 0x0a #define RESERVATION_CONFLICT 0x0c #define STATUS_MASK 0x1e /* the return of the status word will be in the following format : The low byte is the status returned by the SCSI command, with vendor specific bits masked. The next byte is the message which followed the SCSI status. This allows a stos to be used, since the Intel is a little endian machine. The final byte is a host return code, which is one of the following. IE lsb msb status msg host code Our errors returned by OUR driver, NOT SCSI message. Orr'd with SCSI message passed back to driver <IF any>. */ /* NO error */ #define DID_OK 0x00 /* Couldn't connect before timeout period */ #define DID_NO_CONNECT 0x01 /* BUS stayed busy through time out period */ #define DID_BUS_BUSY 0x02 /* TIMED OUT for other reason */ #define DID_TIME_OUT 0x03 /* BAD target. */ #define DID_BAD_TARGET 0x04 /* Told to abort for some other reason */ #define DID_ABORT 0x05 /* Parity error */ #define DID_PARITY 0x06 /* Internal error */ #define DID_ERROR 0x07 /* Reset by somebody. */ #define DID_RESET 0x08 /* Driver status */ #define DRIVER_OK 0x00 /* These indicate the error that occured, and what is available. */ #define DRIVER_BUSY 0x01 #define DRIVER_SOFT 0x02 #define DRIVER_MEDIA 0x03 #define DRIVER_ERROR 0x04 #define DRIVER_INVALID 0x05 #define DRIVER_TIMEOUT 0x06 #define DRIVER_HARD 0x07 #define SUGGEST_RETRY 0x08 #define SUGGEST_ABORT 0x09 #define SUGGEST_REMAP 0x0a #define SUGGEST_DIE 0x0b #define DRIVER_SENSE 0x10 #define DRIVER_MASK 0x0f #define SUGGEST_MASK 0xf0 /* SENSE KEYS */ #define NO_SENSE 0x00 #define RECOVERED_ERROR 0x01 #define NOT_READY 0x02 #define MEDIUM_ERROR 0x03 #define HARDWARE_ERROR 0x04 #define ILLEGAL_REQUEST 0x05 #define UNIT_ATTENTION 0x06 #define DATA_PROTECT 0x07 #define BLANK_CHECK 0x08 #define COPY_ABORTED 0x0a #define ABORTED_COMMAND 0x0b #define VOLUME_OVERFLOW 0x0d #define MISCOMPARE 0x0e /* DEVICE TYPES */ #define TYPE_DISK 0x00 #define TYPE_TAPE 0x01 #define TYPE_WORM 0x04 /* Treated as ROM by our system */ #define TYPE_ROM 0x05 #define TYPE_NO_LUN 0x7f /* Every SCSI command starts with a one byte OP-code. The next byte's high three bits are the LUN of the device. Any multi-byte quantities are stored high byte first, and may have a 5 bit MSB in the same byte as the LUN. */ /* The scsi_device struct contains what we know about each given scsi device. */ typedef struct scsi_device { unsigned char host_no, id, lun; unsigned writeable:1; unsigned removable:1; unsigned random:1; } Scsi_Device; /* Use these to separate status msg and our bytes */ #define status_byte(result) (((result) >> 1) & 0xf) #define msg_byte(result) (((result) >> 8) & 0xff) #define host_byte(result) (((result) >> 16) & 0xff) #define driver_byte(result) (((result) >> 24) & 0xff) #define sugestion(result) (driver_byte(result) & SUGGEST_MASK) #define sense_class(sense) (((sense) >> 4) & 0x7) #define sense_error(sense) ((sense) & 0xf) #define sense_valid(sense) ((sense) & 0x80); /* These are the SCSI devices available on the system. */ #define MAX_SCSI_DEVICE 2 extern int NR_SCSI_DEVICES; extern Scsi_Device scsi_devices[MAX_SCSI_DEVICE]; /* scsi_abort aborts the current command that is executing on host host. The error code, if non zero is returned in the host byte, otherwise DID_ABORT is returned in the hostbyte. */ extern int scsi_abort (int host, int code); /* Initializes all SCSI devices. This scans all scsi busses. */ extern void scsi_dev_init (void); /* You guesed it. This sends a command to the selected SCSI host */ extern void scsi_do_cmd (int host, unsigned char target, const void *cmnd , void *buffer, unsigned bufflen, void (*done)(int,int), int timeout, unsigned char *sense_buffer, int retries); int scsi_reset (int host); #endif