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1.1 root 1: /*
2: * scsi.h Copyright (C) 1992 Drew Eckhardt
3: * generic SCSI package header file by
4: * Drew Eckhardt
5: *
6: * <[email protected]>
7: */
8:
9: #ifndef _SCSI_H
10: #define _SCSI_H
11: /*
1.1.1.2 ! root 12: $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/scsi.h,v 1.1 1992/07/24 06:27:38 root Exp root $
1.1 root 13:
14: For documentation on the OPCODES, MESSAGES, and SENSE values,
15: please consult the SCSI standard.
16:
17: */
18:
19: /*
20: SCSI opcodes
21: */
22:
23: #define TEST_UNIT_READY 0x00
24: #define REZERO_UNIT 0x01
25: #define REQUEST_SENSE 0x03
26: #define FORMAT_UNIT 0x04
27: #define REASSIGN_BLOCKS 0x07
28: #define READ_6 0x08
29: #define WRITE_6 0x0a
30: #define SEEK_6 0x0b
31: #define INQUIRY 0x12
32: #define MODE_SELECT 0x15
33: #define RESERVE 0x16
34: #define RELEASE 0x17
35: #define COPY 0x18
36: #define MODE_SENSE 0x1a
37: #define START_STOP 0x1b
38: #define RECIEVE_DAIGNOSTIC 0x1c
39: #define SEND_DIAGNOSTIC 0x1d
40: #define ALLOW_MEDIUM_REMOVAL 0x1e
41:
42: #define READ_CAPACITY 0x25
43: #define READ_10 0x28
44: #define WRITE_10 0x2a
45: #define SEEK_10 0x2b
46: #define WRITE_VERIFY 0x2e
47: #define VERIFY 0x2f
48: #define SEARCH_HIGH 0x30
49: #define SEARCH_EQUAL 0x31
50: #define SEARCH_LOW 0x32
51: #define SET_LIMITS 0x33
52: #define COMPARE 0x39
53: #define COPY_VERIFY 0x3a
54:
55: #define COMMAND_SIZE(opcode) ((opcode) ? ((opcode) > 0x20 ? 10 : 6) : 0)
56:
57: /*
58: MESSAGE CODES
59: */
60:
61: #define COMMAND_COMPLETE 0x00
62: #define EXTENDED_MESSAGE 0x01
63: #define SAVE_POINTERS 0x02
64: #define RESTORE_POINTERS 0x03
65: #define DISCONNECT 0x04
66: #define INITIATOR_ERROR 0x05
67: #define ABORT 0x06
68: #define MESSAGE_REJECT 0x07
69: #define NOP 0x08
70: #define MSG_PARITY_ERROR 0x09
71: #define LINKED_CMD_COMPLETE 0x0a
72: #define LINKED_FLG_CMD_COMPLETE 0x0b
73: #define BUS_DEVICE_RESET 0x0c
1.1.1.2 ! root 74: #define IDENTIFY_BASE 0x80
! 75: #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
! 76: ((can_disconnect) ? 0x40 : 0) |\
! 77: ((lun) & 0x07))
! 78:
! 79:
1.1 root 80: /*
81: Status codes
82: */
83:
84: #define GOOD 0x00
85: #define CHECK_CONDITION 0x01
86: #define CONDITION_GOOD 0x02
87: #define BUSY 0x04
88: #define INTERMEDIATE_GOOD 0x08
89: #define INTERMEDIATE_C_GOOD 0x0a
90: #define RESERVATION_CONFLICT 0x0c
91:
92: #define STATUS_MASK 0x1e
93:
94: /*
95: the return of the status word will be in the following format :
96: The low byte is the status returned by the SCSI command,
97: with vendor specific bits masked.
98:
99: The next byte is the message which followed the SCSI status.
100: This allows a stos to be used, since the Intel is a little
101: endian machine.
102:
103: The final byte is a host return code, which is one of the following.
104:
105: IE
106: lsb msb
107: status msg host code
108:
109: Our errors returned by OUR driver, NOT SCSI message. Orr'd with
110: SCSI message passed back to driver <IF any>.
111: */
112:
113: /* NO error */
114: #define DID_OK 0x00
115: /* Couldn't connect before timeout period */
116: #define DID_NO_CONNECT 0x01
117: /* BUS stayed busy through time out period */
118: #define DID_BUS_BUSY 0x02
119: /* TIMED OUT for other reason */
120: #define DID_TIME_OUT 0x03
121: /* BAD target. */
122: #define DID_BAD_TARGET 0x04
123: /* Told to abort for some other reason */
124: #define DID_ABORT 0x05
125: /*
126: Parity error
127: */
128: #define DID_PARITY 0x06
129: /*
130: Internal error
131: */
132: #define DID_ERROR 0x07
133: /*
134: Reset by somebody.
135: */
136: #define DID_RESET 0x08
1.1.1.2 ! root 137: /*
! 138: Got an interrupt we weren't expecting.
! 139: */
! 140: #define DID_BAD_INTR 0x09
1.1 root 141:
142: /*
143: Driver status
144: */
145: #define DRIVER_OK 0x00
146:
147: /*
148: These indicate the error that occured, and what is available.
149: */
150:
151: #define DRIVER_BUSY 0x01
152: #define DRIVER_SOFT 0x02
153: #define DRIVER_MEDIA 0x03
154: #define DRIVER_ERROR 0x04
155:
156: #define DRIVER_INVALID 0x05
157: #define DRIVER_TIMEOUT 0x06
158: #define DRIVER_HARD 0x07
159:
160: #define SUGGEST_RETRY 0x08
161: #define SUGGEST_ABORT 0x09
162: #define SUGGEST_REMAP 0x0a
163: #define SUGGEST_DIE 0x0b
164:
165: #define DRIVER_SENSE 0x10
166:
167: #define DRIVER_MASK 0x0f
168: #define SUGGEST_MASK 0xf0
169:
170: /*
171:
172: SENSE KEYS
173: */
174:
175: #define NO_SENSE 0x00
176: #define RECOVERED_ERROR 0x01
177: #define NOT_READY 0x02
178: #define MEDIUM_ERROR 0x03
179: #define HARDWARE_ERROR 0x04
180: #define ILLEGAL_REQUEST 0x05
181: #define UNIT_ATTENTION 0x06
182: #define DATA_PROTECT 0x07
183: #define BLANK_CHECK 0x08
184: #define COPY_ABORTED 0x0a
185: #define ABORTED_COMMAND 0x0b
186: #define VOLUME_OVERFLOW 0x0d
187: #define MISCOMPARE 0x0e
188:
189:
190: /*
191: DEVICE TYPES
192:
193: */
194:
195: #define TYPE_DISK 0x00
196: #define TYPE_TAPE 0x01
197: #define TYPE_WORM 0x04 /* Treated as ROM by our system */
198: #define TYPE_ROM 0x05
199: #define TYPE_NO_LUN 0x7f
200: /*
201: Every SCSI command starts with a one byte OP-code.
202: The next byte's high three bits are the LUN of the
203: device. Any multi-byte quantities are stored high byte
204: first, and may have a 5 bit MSB in the same byte
205: as the LUN.
206: */
207:
208:
209: /*
210: The scsi_device struct contains what we know about each given scsi
211: device.
212: */
213:
214: typedef struct scsi_device {
215: unsigned char host_no, id, lun;
216: unsigned writeable:1;
217: unsigned removable:1;
218: unsigned random:1;
219: } Scsi_Device;
220: /*
221: Use these to separate status msg and our bytes
222: */
223:
224: #define status_byte(result) (((result) >> 1) & 0xf)
225: #define msg_byte(result) (((result) >> 8) & 0xff)
226: #define host_byte(result) (((result) >> 16) & 0xff)
227: #define driver_byte(result) (((result) >> 24) & 0xff)
228: #define sugestion(result) (driver_byte(result) & SUGGEST_MASK)
229:
230: #define sense_class(sense) (((sense) >> 4) & 0x7)
231: #define sense_error(sense) ((sense) & 0xf)
232: #define sense_valid(sense) ((sense) & 0x80);
233:
234: /*
235: These are the SCSI devices available on the system.
236: */
237:
1.1.1.2 ! root 238: #define MAX_SCSI_DEVICE 4
1.1 root 239: extern int NR_SCSI_DEVICES;
240: extern Scsi_Device scsi_devices[MAX_SCSI_DEVICE];
241: /*
242: scsi_abort aborts the current command that is executing on host host.
243: The error code, if non zero is returned in the host byte, otherwise
244: DID_ABORT is returned in the hostbyte.
245: */
246:
247: extern int scsi_abort (int host, int code);
248:
249: /*
250: Initializes all SCSI devices. This scans all scsi busses.
251: */
252:
253: extern void scsi_dev_init (void);
254:
255: /*
256: You guesed it. This sends a command to the selected SCSI host
257: */
258:
259:
260:
261: extern void scsi_do_cmd (int host, unsigned char target, const void *cmnd ,
262: void *buffer, unsigned bufflen, void (*done)(int,int),
263: int timeout, unsigned char *sense_buffer, int retries);
264:
1.1.1.2 ! root 265: extern int scsi_reset (int host);
1.1 root 266: #endif
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