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Commit | Line | Data |
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2cc977e2 TS |
1 | /* |
2 | * Generic SCSI Device support | |
3 | * | |
4 | * Copyright (c) 2007 Bull S.A.S. | |
5 | * Based on code by Paul Brook | |
6 | * Based on code by Fabrice Bellard | |
7 | * | |
8 | * Written by Laurent Vivier <Laurent.Vivier@bull.net> | |
9 | * | |
10 | * This code is licenced under the LGPL. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "qemu-common.h" | |
15 | #include "block.h" | |
43b443b6 | 16 | #include "scsi.h" |
2cc977e2 | 17 | |
d52affa7 | 18 | #ifdef __linux__ |
2cc977e2 TS |
19 | |
20 | //#define DEBUG_SCSI | |
21 | ||
22 | #ifdef DEBUG_SCSI | |
001faf32 BS |
23 | #define DPRINTF(fmt, ...) \ |
24 | do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) | |
2cc977e2 | 25 | #else |
001faf32 | 26 | #define DPRINTF(fmt, ...) do {} while(0) |
2cc977e2 TS |
27 | #endif |
28 | ||
001faf32 BS |
29 | #define BADF(fmt, ...) \ |
30 | do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) | |
2cc977e2 TS |
31 | |
32 | #include <stdio.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/stat.h> | |
35 | #include <unistd.h> | |
36 | #include <scsi/sg.h> | |
0d65e1f8 | 37 | #include "scsi-defs.h" |
2cc977e2 | 38 | |
a9dd6843 | 39 | #define SCSI_SENSE_BUF_SIZE 96 |
2cc977e2 TS |
40 | |
41 | #define SG_ERR_DRIVER_TIMEOUT 0x06 | |
42 | #define SG_ERR_DRIVER_SENSE 0x08 | |
43 | ||
44 | #ifndef MAX_UINT | |
45 | #define MAX_UINT ((unsigned int)-1) | |
46 | #endif | |
47 | ||
d52affa7 GH |
48 | typedef struct SCSIGenericState SCSIGenericState; |
49 | ||
4c41d2ef GH |
50 | typedef struct SCSIGenericReq { |
51 | SCSIRequest req; | |
2cc977e2 TS |
52 | uint8_t *buf; |
53 | int buflen; | |
54 | int len; | |
55 | sg_io_hdr_t io_header; | |
4c41d2ef | 56 | } SCSIGenericReq; |
2cc977e2 | 57 | |
d52affa7 | 58 | struct SCSIGenericState |
2cc977e2 | 59 | { |
d52affa7 | 60 | SCSIDevice qdev; |
2cc977e2 | 61 | int lun; |
2cc977e2 TS |
62 | int driver_status; |
63 | uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; | |
89c0f643 | 64 | uint8_t senselen; |
2cc977e2 TS |
65 | }; |
66 | ||
89b08ae1 | 67 | static SCSIGenericReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun) |
2cc977e2 | 68 | { |
89b08ae1 | 69 | SCSIRequest *req; |
2cc977e2 | 70 | |
89b08ae1 GH |
71 | req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun); |
72 | return DO_UPCAST(SCSIGenericReq, req, req); | |
2cc977e2 TS |
73 | } |
74 | ||
4c41d2ef | 75 | static void scsi_remove_request(SCSIGenericReq *r) |
2cc977e2 | 76 | { |
9af99d98 | 77 | qemu_free(r->buf); |
89b08ae1 | 78 | scsi_req_free(&r->req); |
2cc977e2 TS |
79 | } |
80 | ||
4c41d2ef | 81 | static SCSIGenericReq *scsi_find_request(SCSIGenericState *s, uint32_t tag) |
2cc977e2 | 82 | { |
89b08ae1 | 83 | return DO_UPCAST(SCSIGenericReq, req, scsi_req_find(&s->qdev, tag)); |
2cc977e2 TS |
84 | } |
85 | ||
86 | /* Helper function for command completion. */ | |
87 | static void scsi_command_complete(void *opaque, int ret) | |
88 | { | |
4c41d2ef GH |
89 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
90 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); | |
2cc977e2 TS |
91 | |
92 | s->driver_status = r->io_header.driver_status; | |
89c0f643 AJ |
93 | if (s->driver_status & SG_ERR_DRIVER_SENSE) |
94 | s->senselen = r->io_header.sb_len_wr; | |
95 | ||
2cc977e2 | 96 | if (ret != 0) |
ed3a34a3 | 97 | r->req.status = BUSY << 1; |
2cc977e2 TS |
98 | else { |
99 | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) { | |
ed3a34a3 | 100 | r->req.status = BUSY << 1; |
2cc977e2 | 101 | BADF("Driver Timeout\n"); |
89c0f643 | 102 | } else if (r->io_header.status) |
ed3a34a3 | 103 | r->req.status = r->io_header.status; |
89c0f643 | 104 | else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
ed3a34a3 | 105 | r->req.status = CHECK_CONDITION << 1; |
2cc977e2 | 106 | else |
ed3a34a3 | 107 | r->req.status = GOOD << 1; |
2cc977e2 | 108 | } |
89c0f643 | 109 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n", |
ed3a34a3 GH |
110 | r, r->req.tag, r->req.status); |
111 | ||
112 | scsi_req_complete(&r->req); | |
89b08ae1 | 113 | scsi_remove_request(r); |
2cc977e2 TS |
114 | } |
115 | ||
116 | /* Cancel a pending data transfer. */ | |
117 | static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) | |
118 | { | |
119 | DPRINTF("scsi_cancel_io 0x%x\n", tag); | |
d52affa7 | 120 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
4c41d2ef | 121 | SCSIGenericReq *r; |
2cc977e2 TS |
122 | DPRINTF("Cancel tag=0x%x\n", tag); |
123 | r = scsi_find_request(s, tag); | |
124 | if (r) { | |
4c41d2ef GH |
125 | if (r->req.aiocb) |
126 | bdrv_aio_cancel(r->req.aiocb); | |
127 | r->req.aiocb = NULL; | |
2cc977e2 TS |
128 | scsi_remove_request(r); |
129 | } | |
130 | } | |
131 | ||
132 | static int execute_command(BlockDriverState *bdrv, | |
4c41d2ef | 133 | SCSIGenericReq *r, int direction, |
2cc977e2 TS |
134 | BlockDriverCompletionFunc *complete) |
135 | { | |
4c41d2ef GH |
136 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
137 | ||
2cc977e2 TS |
138 | r->io_header.interface_id = 'S'; |
139 | r->io_header.dxfer_direction = direction; | |
140 | r->io_header.dxferp = r->buf; | |
141 | r->io_header.dxfer_len = r->buflen; | |
29362ebe GH |
142 | r->io_header.cmdp = r->req.cmd.buf; |
143 | r->io_header.cmd_len = r->req.cmd.len; | |
4c41d2ef GH |
144 | r->io_header.mx_sb_len = sizeof(s->sensebuf); |
145 | r->io_header.sbp = s->sensebuf; | |
2cc977e2 TS |
146 | r->io_header.timeout = MAX_UINT; |
147 | r->io_header.usr_ptr = r; | |
148 | r->io_header.flags |= SG_FLAG_DIRECT_IO; | |
149 | ||
4c41d2ef GH |
150 | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
151 | if (r->req.aiocb == NULL) { | |
2cc977e2 TS |
152 | BADF("execute_command: read failed !\n"); |
153 | return -1; | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static void scsi_read_complete(void * opaque, int ret) | |
160 | { | |
4c41d2ef | 161 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
2cc977e2 TS |
162 | int len; |
163 | ||
164 | if (ret) { | |
165 | DPRINTF("IO error\n"); | |
166 | scsi_command_complete(r, ret); | |
167 | return; | |
168 | } | |
169 | len = r->io_header.dxfer_len - r->io_header.resid; | |
4c41d2ef | 170 | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len); |
2cc977e2 TS |
171 | |
172 | r->len = -1; | |
4c41d2ef | 173 | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
89c0f643 AJ |
174 | if (len == 0) |
175 | scsi_command_complete(r, 0); | |
2cc977e2 TS |
176 | } |
177 | ||
178 | /* Read more data from scsi device into buffer. */ | |
179 | static void scsi_read_data(SCSIDevice *d, uint32_t tag) | |
180 | { | |
d52affa7 | 181 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
4c41d2ef | 182 | SCSIGenericReq *r; |
2cc977e2 TS |
183 | int ret; |
184 | ||
185 | DPRINTF("scsi_read_data 0x%x\n", tag); | |
186 | r = scsi_find_request(s, tag); | |
187 | if (!r) { | |
188 | BADF("Bad read tag 0x%x\n", tag); | |
189 | /* ??? This is the wrong error. */ | |
190 | scsi_command_complete(r, -EINVAL); | |
191 | return; | |
192 | } | |
193 | ||
194 | if (r->len == -1) { | |
195 | scsi_command_complete(r, 0); | |
196 | return; | |
197 | } | |
198 | ||
29362ebe | 199 | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
2cc977e2 | 200 | { |
89c0f643 AJ |
201 | s->senselen = MIN(r->len, s->senselen); |
202 | memcpy(r->buf, s->sensebuf, s->senselen); | |
2cc977e2 | 203 | r->io_header.driver_status = 0; |
89c0f643 AJ |
204 | r->io_header.status = 0; |
205 | r->io_header.dxfer_len = s->senselen; | |
2cc977e2 | 206 | r->len = -1; |
4c41d2ef | 207 | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen); |
a9dd6843 AL |
208 | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n", |
209 | r->buf[0], r->buf[1], r->buf[2], r->buf[3], | |
210 | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); | |
4c41d2ef | 211 | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen); |
2cc977e2 TS |
212 | return; |
213 | } | |
214 | ||
251882b7 | 215 | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
2cc977e2 TS |
216 | if (ret == -1) { |
217 | scsi_command_complete(r, -EINVAL); | |
218 | return; | |
219 | } | |
220 | } | |
221 | ||
222 | static void scsi_write_complete(void * opaque, int ret) | |
223 | { | |
4c41d2ef GH |
224 | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
225 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); | |
2cc977e2 TS |
226 | |
227 | DPRINTF("scsi_write_complete() ret = %d\n", ret); | |
228 | if (ret) { | |
229 | DPRINTF("IO error\n"); | |
230 | scsi_command_complete(r, ret); | |
231 | return; | |
232 | } | |
233 | ||
29362ebe | 234 | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
91376656 | 235 | s->qdev.type == TYPE_TAPE) { |
b07995e3 | 236 | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
4c41d2ef | 237 | DPRINTF("block size %d\n", s->blocksize); |
89c0f643 AJ |
238 | } |
239 | ||
2cc977e2 TS |
240 | scsi_command_complete(r, ret); |
241 | } | |
242 | ||
243 | /* Write data to a scsi device. Returns nonzero on failure. | |
244 | The transfer may complete asynchronously. */ | |
245 | static int scsi_write_data(SCSIDevice *d, uint32_t tag) | |
246 | { | |
d52affa7 | 247 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
4c41d2ef | 248 | SCSIGenericReq *r; |
2cc977e2 TS |
249 | int ret; |
250 | ||
251 | DPRINTF("scsi_write_data 0x%x\n", tag); | |
252 | r = scsi_find_request(s, tag); | |
253 | if (!r) { | |
254 | BADF("Bad write tag 0x%x\n", tag); | |
255 | /* ??? This is the wrong error. */ | |
256 | scsi_command_complete(r, -EINVAL); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | if (r->len == 0) { | |
261 | r->len = r->buflen; | |
4c41d2ef | 262 | r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len); |
2cc977e2 TS |
263 | return 0; |
264 | } | |
265 | ||
251882b7 | 266 | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete); |
2cc977e2 TS |
267 | if (ret == -1) { |
268 | scsi_command_complete(r, -EINVAL); | |
269 | return 1; | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | /* Return a pointer to the data buffer. */ | |
276 | static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag) | |
277 | { | |
d52affa7 | 278 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
4c41d2ef | 279 | SCSIGenericReq *r; |
2cc977e2 TS |
280 | r = scsi_find_request(s, tag); |
281 | if (!r) { | |
282 | BADF("Bad buffer tag 0x%x\n", tag); | |
283 | return NULL; | |
284 | } | |
285 | return r->buf; | |
286 | } | |
287 | ||
2ec749cb | 288 | static void scsi_req_fixup(SCSIRequest *req) |
2cc977e2 | 289 | { |
2ec749cb | 290 | switch(req->cmd.buf[0]) { |
2cc977e2 | 291 | case WRITE_10: |
2ec749cb | 292 | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
2cc977e2 TS |
293 | break; |
294 | case READ_10: | |
2ec749cb | 295 | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
a9dd6843 AL |
296 | break; |
297 | case REWIND: | |
298 | case START_STOP: | |
2ec749cb GH |
299 | if (req->dev->type == TYPE_TAPE) { |
300 | /* force IMMED, otherwise qemu waits end of command */ | |
301 | req->cmd.buf[1] = 0x01; | |
302 | } | |
a9dd6843 | 303 | break; |
a9dd6843 | 304 | } |
a9dd6843 AL |
305 | } |
306 | ||
2cc977e2 TS |
307 | /* Execute a scsi command. Returns the length of the data expected by the |
308 | command. This will be Positive for data transfers from the device | |
309 | (eg. disk reads), negative for transfers to the device (eg. disk writes), | |
310 | and zero if the command does not transfer any data. */ | |
311 | ||
312 | static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag, | |
313 | uint8_t *cmd, int lun) | |
314 | { | |
d52affa7 | 315 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
4c41d2ef | 316 | SCSIGenericReq *r; |
d52affa7 | 317 | SCSIBus *bus; |
2cc977e2 TS |
318 | int ret; |
319 | ||
89c0f643 AJ |
320 | if (cmd[0] != REQUEST_SENSE && |
321 | (lun != s->lun || (cmd[1] >> 5) != s->lun)) { | |
322 | DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); | |
323 | ||
324 | s->sensebuf[0] = 0x70; | |
325 | s->sensebuf[1] = 0x00; | |
326 | s->sensebuf[2] = ILLEGAL_REQUEST; | |
327 | s->sensebuf[3] = 0x00; | |
328 | s->sensebuf[4] = 0x00; | |
329 | s->sensebuf[5] = 0x00; | |
330 | s->sensebuf[6] = 0x00; | |
331 | s->senselen = 7; | |
332 | s->driver_status = SG_ERR_DRIVER_SENSE; | |
d52affa7 GH |
333 | bus = scsi_bus_from_device(d); |
334 | bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION << 1); | |
89c0f643 AJ |
335 | return 0; |
336 | } | |
337 | ||
2cc977e2 TS |
338 | r = scsi_find_request(s, tag); |
339 | if (r) { | |
340 | BADF("Tag 0x%x already in use %p\n", tag, r); | |
341 | scsi_cancel_io(d, tag); | |
342 | } | |
89b08ae1 | 343 | r = scsi_new_request(d, tag, lun); |
2cc977e2 | 344 | |
2ec749cb GH |
345 | if (-1 == scsi_req_parse(&r->req, cmd)) { |
346 | BADF("Unsupported command length, command %x\n", cmd[0]); | |
347 | scsi_remove_request(r); | |
348 | return 0; | |
349 | } | |
350 | scsi_req_fixup(&r->req); | |
351 | ||
352 | DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag, | |
353 | cmd[0], r->req.cmd.xfer); | |
2cc977e2 | 354 | |
2ec749cb | 355 | if (r->req.cmd.xfer == 0) { |
2cc977e2 | 356 | if (r->buf != NULL) |
e3c916e6 | 357 | qemu_free(r->buf); |
2cc977e2 TS |
358 | r->buflen = 0; |
359 | r->buf = NULL; | |
251882b7 | 360 | ret = execute_command(s->qdev.dinfo->bdrv, r, SG_DXFER_NONE, scsi_command_complete); |
2cc977e2 TS |
361 | if (ret == -1) { |
362 | scsi_command_complete(r, -EINVAL); | |
363 | return 0; | |
364 | } | |
365 | return 0; | |
366 | } | |
367 | ||
2ec749cb | 368 | if (r->buflen != r->req.cmd.xfer) { |
2cc977e2 | 369 | if (r->buf != NULL) |
e3c916e6 | 370 | qemu_free(r->buf); |
2ec749cb GH |
371 | r->buf = qemu_malloc(r->req.cmd.xfer); |
372 | r->buflen = r->req.cmd.xfer; | |
2cc977e2 TS |
373 | } |
374 | ||
375 | memset(r->buf, 0, r->buflen); | |
2ec749cb | 376 | r->len = r->req.cmd.xfer; |
97a06435 | 377 | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { |
2cc977e2 | 378 | r->len = 0; |
2ec749cb | 379 | return -r->req.cmd.xfer; |
2cc977e2 TS |
380 | } |
381 | ||
2ec749cb | 382 | return r->req.cmd.xfer; |
2cc977e2 TS |
383 | } |
384 | ||
385 | static int get_blocksize(BlockDriverState *bdrv) | |
386 | { | |
387 | uint8_t cmd[10]; | |
388 | uint8_t buf[8]; | |
389 | uint8_t sensebuf[8]; | |
390 | sg_io_hdr_t io_header; | |
391 | int ret; | |
392 | ||
4f26a486 AL |
393 | memset(cmd, 0, sizeof(cmd)); |
394 | memset(buf, 0, sizeof(buf)); | |
2cc977e2 TS |
395 | cmd[0] = READ_CAPACITY; |
396 | ||
397 | memset(&io_header, 0, sizeof(io_header)); | |
398 | io_header.interface_id = 'S'; | |
399 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; | |
400 | io_header.dxfer_len = sizeof(buf); | |
401 | io_header.dxferp = buf; | |
402 | io_header.cmdp = cmd; | |
403 | io_header.cmd_len = sizeof(cmd); | |
404 | io_header.mx_sb_len = sizeof(sensebuf); | |
405 | io_header.sbp = sensebuf; | |
406 | io_header.timeout = 6000; /* XXX */ | |
407 | ||
221f715d | 408 | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
7d780669 | 409 | if (ret < 0) |
2cc977e2 TS |
410 | return -1; |
411 | ||
412 | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; | |
413 | } | |
414 | ||
89c0f643 AJ |
415 | static int get_stream_blocksize(BlockDriverState *bdrv) |
416 | { | |
417 | uint8_t cmd[6]; | |
418 | uint8_t buf[12]; | |
419 | uint8_t sensebuf[8]; | |
420 | sg_io_hdr_t io_header; | |
421 | int ret; | |
422 | ||
423 | memset(cmd, 0, sizeof(cmd)); | |
424 | memset(buf, 0, sizeof(buf)); | |
425 | cmd[0] = MODE_SENSE; | |
426 | cmd[4] = sizeof(buf); | |
427 | ||
428 | memset(&io_header, 0, sizeof(io_header)); | |
429 | io_header.interface_id = 'S'; | |
430 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; | |
431 | io_header.dxfer_len = sizeof(buf); | |
432 | io_header.dxferp = buf; | |
433 | io_header.cmdp = cmd; | |
434 | io_header.cmd_len = sizeof(cmd); | |
435 | io_header.mx_sb_len = sizeof(sensebuf); | |
436 | io_header.sbp = sensebuf; | |
437 | io_header.timeout = 6000; /* XXX */ | |
438 | ||
221f715d | 439 | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
7d780669 | 440 | if (ret < 0) |
89c0f643 AJ |
441 | return -1; |
442 | ||
443 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; | |
444 | } | |
445 | ||
2cc977e2 TS |
446 | static void scsi_destroy(SCSIDevice *d) |
447 | { | |
d52affa7 | 448 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
9af99d98 | 449 | SCSIGenericReq *r; |
2cc977e2 | 450 | |
9af99d98 GH |
451 | while (!QTAILQ_EMPTY(&s->qdev.requests)) { |
452 | r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests)); | |
453 | scsi_remove_request(r); | |
2cc977e2 | 454 | } |
251882b7 | 455 | drive_uninit(s->qdev.dinfo); |
2cc977e2 TS |
456 | } |
457 | ||
d52affa7 | 458 | static int scsi_generic_initfn(SCSIDevice *dev) |
2cc977e2 | 459 | { |
d52affa7 | 460 | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
2cc977e2 | 461 | int sg_version; |
2cc977e2 TS |
462 | struct sg_scsi_id scsiid; |
463 | ||
251882b7 | 464 | if (!s->qdev.dinfo || !s->qdev.dinfo->bdrv) { |
d52affa7 GH |
465 | qemu_error("scsi-generic: drive property not set\n"); |
466 | return -1; | |
467 | } | |
2cc977e2 | 468 | |
d52affa7 | 469 | /* check we are really using a /dev/sg* file */ |
251882b7 | 470 | if (!bdrv_is_sg(s->qdev.dinfo->bdrv)) { |
d52affa7 GH |
471 | qemu_error("scsi-generic: not /dev/sg*\n"); |
472 | return -1; | |
473 | } | |
2cc977e2 TS |
474 | |
475 | /* check we are using a driver managing SG_IO (version 3 and after */ | |
251882b7 | 476 | if (bdrv_ioctl(s->qdev.dinfo->bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 || |
d52affa7 GH |
477 | sg_version < 30000) { |
478 | qemu_error("scsi-generic: scsi generic interface too old\n"); | |
479 | return -1; | |
480 | } | |
2cc977e2 TS |
481 | |
482 | /* get LUN of the /dev/sg? */ | |
251882b7 | 483 | if (bdrv_ioctl(s->qdev.dinfo->bdrv, SG_GET_SCSI_ID, &scsiid)) { |
d52affa7 GH |
484 | qemu_error("scsi-generic: SG_GET_SCSI_ID ioctl failed\n"); |
485 | return -1; | |
486 | } | |
2cc977e2 TS |
487 | |
488 | /* define device state */ | |
2cc977e2 | 489 | s->lun = scsiid.lun; |
89c0f643 | 490 | DPRINTF("LUN %d\n", s->lun); |
91376656 GH |
491 | s->qdev.type = scsiid.scsi_type; |
492 | DPRINTF("device type %d\n", s->qdev.type); | |
493 | if (s->qdev.type == TYPE_TAPE) { | |
251882b7 | 494 | s->qdev.blocksize = get_stream_blocksize(s->qdev.dinfo->bdrv); |
b07995e3 GH |
495 | if (s->qdev.blocksize == -1) |
496 | s->qdev.blocksize = 0; | |
89c0f643 | 497 | } else { |
251882b7 | 498 | s->qdev.blocksize = get_blocksize(s->qdev.dinfo->bdrv); |
89c0f643 | 499 | /* removable media returns 0 if not present */ |
b07995e3 | 500 | if (s->qdev.blocksize <= 0) { |
91376656 | 501 | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) |
b07995e3 | 502 | s->qdev.blocksize = 2048; |
89c0f643 | 503 | else |
b07995e3 | 504 | s->qdev.blocksize = 512; |
89c0f643 AJ |
505 | } |
506 | } | |
b07995e3 | 507 | DPRINTF("block size %d\n", s->qdev.blocksize); |
2cc977e2 TS |
508 | s->driver_status = 0; |
509 | memset(s->sensebuf, 0, sizeof(s->sensebuf)); | |
d52affa7 GH |
510 | return 0; |
511 | } | |
2cc977e2 | 512 | |
d52affa7 GH |
513 | static SCSIDeviceInfo scsi_generic_info = { |
514 | .qdev.name = "scsi-generic", | |
515 | .qdev.desc = "pass through generic scsi device (/dev/sg*)", | |
516 | .qdev.size = sizeof(SCSIGenericState), | |
517 | .init = scsi_generic_initfn, | |
518 | .destroy = scsi_destroy, | |
519 | .send_command = scsi_send_command, | |
520 | .read_data = scsi_read_data, | |
521 | .write_data = scsi_write_data, | |
522 | .cancel_io = scsi_cancel_io, | |
523 | .get_buf = scsi_get_buf, | |
524 | .qdev.props = (Property[]) { | |
251882b7 | 525 | DEFINE_PROP_DRIVE("drive", SCSIGenericState, qdev.dinfo), |
d52affa7 GH |
526 | DEFINE_PROP_END_OF_LIST(), |
527 | }, | |
528 | }; | |
2cc977e2 | 529 | |
d52affa7 GH |
530 | static void scsi_generic_register_devices(void) |
531 | { | |
532 | scsi_qdev_register(&scsi_generic_info); | |
2cc977e2 | 533 | } |
d52affa7 GH |
534 | device_init(scsi_generic_register_devices) |
535 | ||
2cc977e2 | 536 | #endif /* __linux__ */ |