root / hw / scsi-generic.c @ fc4f0754
History | View | Annotate | Download (14.9 kB)
1 | 2cc977e2 | ths | /*
|
---|---|---|---|
2 | 2cc977e2 | ths | * Generic SCSI Device support
|
3 | 2cc977e2 | ths | *
|
4 | 2cc977e2 | ths | * Copyright (c) 2007 Bull S.A.S.
|
5 | 2cc977e2 | ths | * Based on code by Paul Brook
|
6 | 2cc977e2 | ths | * Based on code by Fabrice Bellard
|
7 | 2cc977e2 | ths | *
|
8 | 2cc977e2 | ths | * Written by Laurent Vivier <Laurent.Vivier@bull.net>
|
9 | 2cc977e2 | ths | *
|
10 | 2cc977e2 | ths | * This code is licenced under the LGPL.
|
11 | 2cc977e2 | ths | *
|
12 | 2cc977e2 | ths | */
|
13 | 2cc977e2 | ths | |
14 | 2cc977e2 | ths | #include "qemu-common.h" |
15 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
16 | 43b443b6 | Gerd Hoffmann | #include "scsi.h" |
17 | 2446333c | Blue Swirl | #include "blockdev.h" |
18 | 2cc977e2 | ths | |
19 | d52affa7 | Gerd Hoffmann | #ifdef __linux__
|
20 | 2cc977e2 | ths | |
21 | 2cc977e2 | ths | //#define DEBUG_SCSI
|
22 | 2cc977e2 | ths | |
23 | 2cc977e2 | ths | #ifdef DEBUG_SCSI
|
24 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) \
|
25 | 001faf32 | Blue Swirl | do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
26 | 2cc977e2 | ths | #else
|
27 | 001faf32 | Blue Swirl | #define DPRINTF(fmt, ...) do {} while(0) |
28 | 2cc977e2 | ths | #endif
|
29 | 2cc977e2 | ths | |
30 | 001faf32 | Blue Swirl | #define BADF(fmt, ...) \
|
31 | 001faf32 | Blue Swirl | do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0) |
32 | 2cc977e2 | ths | |
33 | 2cc977e2 | ths | #include <stdio.h> |
34 | 2cc977e2 | ths | #include <sys/types.h> |
35 | 2cc977e2 | ths | #include <sys/stat.h> |
36 | 2cc977e2 | ths | #include <unistd.h> |
37 | 2cc977e2 | ths | #include <scsi/sg.h> |
38 | 0d65e1f8 | Gerd Hoffmann | #include "scsi-defs.h" |
39 | 2cc977e2 | ths | |
40 | a9dd6843 | aliguori | #define SCSI_SENSE_BUF_SIZE 96 |
41 | 2cc977e2 | ths | |
42 | 2cc977e2 | ths | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
43 | 2cc977e2 | ths | #define SG_ERR_DRIVER_SENSE 0x08 |
44 | 2cc977e2 | ths | |
45 | 2cc977e2 | ths | #ifndef MAX_UINT
|
46 | 2cc977e2 | ths | #define MAX_UINT ((unsigned int)-1) |
47 | 2cc977e2 | ths | #endif
|
48 | 2cc977e2 | ths | |
49 | d52affa7 | Gerd Hoffmann | typedef struct SCSIGenericState SCSIGenericState; |
50 | d52affa7 | Gerd Hoffmann | |
51 | 4c41d2ef | Gerd Hoffmann | typedef struct SCSIGenericReq { |
52 | 4c41d2ef | Gerd Hoffmann | SCSIRequest req; |
53 | 2cc977e2 | ths | uint8_t *buf; |
54 | 2cc977e2 | ths | int buflen;
|
55 | 2cc977e2 | ths | int len;
|
56 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
57 | 4c41d2ef | Gerd Hoffmann | } SCSIGenericReq; |
58 | 2cc977e2 | ths | |
59 | d52affa7 | Gerd Hoffmann | struct SCSIGenericState
|
60 | 2cc977e2 | ths | { |
61 | d52affa7 | Gerd Hoffmann | SCSIDevice qdev; |
62 | 428c149b | Christoph Hellwig | BlockDriverState *bs; |
63 | 2cc977e2 | ths | int lun;
|
64 | 2cc977e2 | ths | int driver_status;
|
65 | 2cc977e2 | ths | uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; |
66 | 89c0f643 | aurel32 | uint8_t senselen; |
67 | 2cc977e2 | ths | }; |
68 | 2cc977e2 | ths | |
69 | a1f0cce2 | Hannes Reinecke | static void scsi_set_sense(SCSIGenericState *s, SCSISense sense) |
70 | a1f0cce2 | Hannes Reinecke | { |
71 | a1f0cce2 | Hannes Reinecke | s->senselen = scsi_build_sense(sense, s->sensebuf, SCSI_SENSE_BUF_SIZE, 0);
|
72 | a1f0cce2 | Hannes Reinecke | s->driver_status = SG_ERR_DRIVER_SENSE; |
73 | a1f0cce2 | Hannes Reinecke | } |
74 | a1f0cce2 | Hannes Reinecke | |
75 | a1f0cce2 | Hannes Reinecke | static void scsi_clear_sense(SCSIGenericState *s) |
76 | a1f0cce2 | Hannes Reinecke | { |
77 | a1f0cce2 | Hannes Reinecke | memset(s->sensebuf, 0, SCSI_SENSE_BUF_SIZE);
|
78 | a1f0cce2 | Hannes Reinecke | s->senselen = 0;
|
79 | a1f0cce2 | Hannes Reinecke | s->driver_status = 0;
|
80 | a1f0cce2 | Hannes Reinecke | } |
81 | a1f0cce2 | Hannes Reinecke | |
82 | 5c6c0e51 | Hannes Reinecke | static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
|
83 | 2cc977e2 | ths | { |
84 | 89b08ae1 | Gerd Hoffmann | SCSIRequest *req; |
85 | 2cc977e2 | ths | |
86 | 89b08ae1 | Gerd Hoffmann | req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
|
87 | 5c6c0e51 | Hannes Reinecke | return req;
|
88 | 2cc977e2 | ths | } |
89 | 2cc977e2 | ths | |
90 | ad2d30f7 | Paolo Bonzini | static void scsi_free_request(SCSIRequest *req) |
91 | 2cc977e2 | ths | { |
92 | ad2d30f7 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
93 | ad2d30f7 | Paolo Bonzini | |
94 | 9af99d98 | Gerd Hoffmann | qemu_free(r->buf); |
95 | 2cc977e2 | ths | } |
96 | 2cc977e2 | ths | |
97 | 2cc977e2 | ths | /* Helper function for command completion. */
|
98 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
99 | 2cc977e2 | ths | { |
100 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
101 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
102 | 2cc977e2 | ths | |
103 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
104 | 2cc977e2 | ths | s->driver_status = r->io_header.driver_status; |
105 | 89c0f643 | aurel32 | if (s->driver_status & SG_ERR_DRIVER_SENSE)
|
106 | 89c0f643 | aurel32 | s->senselen = r->io_header.sb_len_wr; |
107 | 89c0f643 | aurel32 | |
108 | a1f0cce2 | Hannes Reinecke | if (ret != 0) { |
109 | a1f0cce2 | Hannes Reinecke | switch (ret) {
|
110 | a1f0cce2 | Hannes Reinecke | case -EINVAL:
|
111 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
112 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(INVALID_FIELD)); |
113 | a1f0cce2 | Hannes Reinecke | break;
|
114 | a1f0cce2 | Hannes Reinecke | case -ENOMEM:
|
115 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
116 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(TARGET_FAILURE)); |
117 | a1f0cce2 | Hannes Reinecke | break;
|
118 | a1f0cce2 | Hannes Reinecke | default:
|
119 | a1f0cce2 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
120 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(IO_ERROR)); |
121 | a1f0cce2 | Hannes Reinecke | break;
|
122 | a1f0cce2 | Hannes Reinecke | } |
123 | a1f0cce2 | Hannes Reinecke | } else {
|
124 | 2cc977e2 | ths | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
|
125 | f0171327 | Hannes Reinecke | r->req.status = BUSY; |
126 | 2cc977e2 | ths | BADF("Driver Timeout\n");
|
127 | 89c0f643 | aurel32 | } else if (r->io_header.status) |
128 | ed3a34a3 | Gerd Hoffmann | r->req.status = r->io_header.status; |
129 | 89c0f643 | aurel32 | else if (s->driver_status & SG_ERR_DRIVER_SENSE) |
130 | f0171327 | Hannes Reinecke | r->req.status = CHECK_CONDITION; |
131 | 2cc977e2 | ths | else
|
132 | f0171327 | Hannes Reinecke | r->req.status = GOOD; |
133 | 2cc977e2 | ths | } |
134 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
|
135 | ed3a34a3 | Gerd Hoffmann | r, r->req.tag, r->req.status); |
136 | ed3a34a3 | Gerd Hoffmann | |
137 | ed3a34a3 | Gerd Hoffmann | scsi_req_complete(&r->req); |
138 | 2cc977e2 | ths | } |
139 | 2cc977e2 | ths | |
140 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
|
141 | 5c6c0e51 | Hannes Reinecke | static void scsi_cancel_io(SCSIRequest *req) |
142 | 2cc977e2 | ths | { |
143 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
144 | 5c6c0e51 | Hannes Reinecke | |
145 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Cancel tag=0x%x\n", req->tag);
|
146 | 5c6c0e51 | Hannes Reinecke | if (r->req.aiocb) {
|
147 | 5c6c0e51 | Hannes Reinecke | bdrv_aio_cancel(r->req.aiocb); |
148 | 2cc977e2 | ths | } |
149 | 5c6c0e51 | Hannes Reinecke | r->req.aiocb = NULL;
|
150 | 2cc977e2 | ths | } |
151 | 2cc977e2 | ths | |
152 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
153 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
|
154 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
155 | 2cc977e2 | ths | { |
156 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
157 | 4c41d2ef | Gerd Hoffmann | |
158 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
|
159 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
160 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
161 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
162 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
163 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
164 | 4c41d2ef | Gerd Hoffmann | r->io_header.mx_sb_len = sizeof(s->sensebuf);
|
165 | 4c41d2ef | Gerd Hoffmann | r->io_header.sbp = s->sensebuf; |
166 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
167 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
168 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
169 | 2cc977e2 | ths | |
170 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
171 | 4c41d2ef | Gerd Hoffmann | if (r->req.aiocb == NULL) { |
172 | 2cc977e2 | ths | BADF("execute_command: read failed !\n");
|
173 | a1f0cce2 | Hannes Reinecke | return -ENOMEM;
|
174 | 2cc977e2 | ths | } |
175 | 2cc977e2 | ths | |
176 | 2cc977e2 | ths | return 0; |
177 | 2cc977e2 | ths | } |
178 | 2cc977e2 | ths | |
179 | 2cc977e2 | ths | static void scsi_read_complete(void * opaque, int ret) |
180 | 2cc977e2 | ths | { |
181 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
182 | 2cc977e2 | ths | int len;
|
183 | 2cc977e2 | ths | |
184 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
185 | 2cc977e2 | ths | if (ret) {
|
186 | aa2b1e89 | Bernhard Kohl | DPRINTF("IO error ret %d\n", ret);
|
187 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
188 | 2cc977e2 | ths | return;
|
189 | 2cc977e2 | ths | } |
190 | 2cc977e2 | ths | len = r->io_header.dxfer_len - r->io_header.resid; |
191 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
|
192 | 2cc977e2 | ths | |
193 | 2cc977e2 | ths | r->len = -1;
|
194 | 40f16dd1 | Paolo Bonzini | if (len == 0) { |
195 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
|
196 | 40f16dd1 | Paolo Bonzini | } else {
|
197 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, len); |
198 | 40f16dd1 | Paolo Bonzini | } |
199 | 2cc977e2 | ths | } |
200 | 2cc977e2 | ths | |
201 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
|
202 | 5c6c0e51 | Hannes Reinecke | static void scsi_read_data(SCSIRequest *req) |
203 | 2cc977e2 | ths | { |
204 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
205 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
206 | 2cc977e2 | ths | int ret;
|
207 | 2cc977e2 | ths | |
208 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_read_data 0x%x\n", req->tag);
|
209 | 2cc977e2 | ths | if (r->len == -1) { |
210 | 2cc977e2 | ths | scsi_command_complete(r, 0);
|
211 | 2cc977e2 | ths | return;
|
212 | 2cc977e2 | ths | } |
213 | 2cc977e2 | ths | |
214 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) |
215 | 2cc977e2 | ths | { |
216 | 89c0f643 | aurel32 | s->senselen = MIN(r->len, s->senselen); |
217 | 89c0f643 | aurel32 | memcpy(r->buf, s->sensebuf, s->senselen); |
218 | 2cc977e2 | ths | r->io_header.driver_status = 0;
|
219 | 89c0f643 | aurel32 | r->io_header.status = 0;
|
220 | 89c0f643 | aurel32 | r->io_header.dxfer_len = s->senselen; |
221 | 2cc977e2 | ths | r->len = -1;
|
222 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
|
223 | a9dd6843 | aliguori | DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
|
224 | a9dd6843 | aliguori | r->buf[0], r->buf[1], r->buf[2], r->buf[3], |
225 | a9dd6843 | aliguori | r->buf[4], r->buf[5], r->buf[6], r->buf[7]); |
226 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, s->senselen); |
227 | a1f0cce2 | Hannes Reinecke | /* Clear sensebuf after REQUEST_SENSE */
|
228 | a1f0cce2 | Hannes Reinecke | scsi_clear_sense(s); |
229 | 2cc977e2 | ths | return;
|
230 | 2cc977e2 | ths | } |
231 | 2cc977e2 | ths | |
232 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
233 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
234 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
235 | 2cc977e2 | ths | return;
|
236 | 2cc977e2 | ths | } |
237 | 2cc977e2 | ths | } |
238 | 2cc977e2 | ths | |
239 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
240 | 2cc977e2 | ths | { |
241 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
242 | 4c41d2ef | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); |
243 | 2cc977e2 | ths | |
244 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
|
245 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
246 | 2cc977e2 | ths | if (ret) {
|
247 | 2cc977e2 | ths | DPRINTF("IO error\n");
|
248 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
249 | 2cc977e2 | ths | return;
|
250 | 2cc977e2 | ths | } |
251 | 2cc977e2 | ths | |
252 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
253 | 91376656 | Gerd Hoffmann | s->qdev.type == TYPE_TAPE) { |
254 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
255 | aa2b1e89 | Bernhard Kohl | DPRINTF("block size %d\n", s->qdev.blocksize);
|
256 | 89c0f643 | aurel32 | } |
257 | 89c0f643 | aurel32 | |
258 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
259 | 2cc977e2 | ths | } |
260 | 2cc977e2 | ths | |
261 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
|
262 | 2cc977e2 | ths | The transfer may complete asynchronously. */
|
263 | 5c6c0e51 | Hannes Reinecke | static int scsi_write_data(SCSIRequest *req) |
264 | 2cc977e2 | ths | { |
265 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
266 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
267 | 2cc977e2 | ths | int ret;
|
268 | 2cc977e2 | ths | |
269 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_write_data 0x%x\n", req->tag);
|
270 | 2cc977e2 | ths | if (r->len == 0) { |
271 | 2cc977e2 | ths | r->len = r->buflen; |
272 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, r->len); |
273 | 2cc977e2 | ths | return 0; |
274 | 2cc977e2 | ths | } |
275 | 2cc977e2 | ths | |
276 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
277 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
278 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
279 | 2cc977e2 | ths | return 1; |
280 | 2cc977e2 | ths | } |
281 | 2cc977e2 | ths | |
282 | 2cc977e2 | ths | return 0; |
283 | 2cc977e2 | ths | } |
284 | 2cc977e2 | ths | |
285 | 2cc977e2 | ths | /* Return a pointer to the data buffer. */
|
286 | 5c6c0e51 | Hannes Reinecke | static uint8_t *scsi_get_buf(SCSIRequest *req)
|
287 | 2cc977e2 | ths | { |
288 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
289 | 5c6c0e51 | Hannes Reinecke | |
290 | 2cc977e2 | ths | return r->buf;
|
291 | 2cc977e2 | ths | } |
292 | 2cc977e2 | ths | |
293 | 2ec749cb | Gerd Hoffmann | static void scsi_req_fixup(SCSIRequest *req) |
294 | 2cc977e2 | ths | { |
295 | 2ec749cb | Gerd Hoffmann | switch(req->cmd.buf[0]) { |
296 | 2cc977e2 | ths | case WRITE_10:
|
297 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
298 | 2cc977e2 | ths | break;
|
299 | 2cc977e2 | ths | case READ_10:
|
300 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] &= ~0x08; /* disable FUA */ |
301 | a9dd6843 | aliguori | break;
|
302 | a9dd6843 | aliguori | case REWIND:
|
303 | a9dd6843 | aliguori | case START_STOP:
|
304 | 2ec749cb | Gerd Hoffmann | if (req->dev->type == TYPE_TAPE) {
|
305 | 2ec749cb | Gerd Hoffmann | /* force IMMED, otherwise qemu waits end of command */
|
306 | 2ec749cb | Gerd Hoffmann | req->cmd.buf[1] = 0x01; |
307 | 2ec749cb | Gerd Hoffmann | } |
308 | a9dd6843 | aliguori | break;
|
309 | a9dd6843 | aliguori | } |
310 | a9dd6843 | aliguori | } |
311 | a9dd6843 | aliguori | |
312 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
|
313 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
|
314 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
|
315 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
|
316 | 2cc977e2 | ths | |
317 | 5c6c0e51 | Hannes Reinecke | static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
|
318 | 2cc977e2 | ths | { |
319 | 5c6c0e51 | Hannes Reinecke | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev); |
320 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
321 | 2cc977e2 | ths | int ret;
|
322 | 2cc977e2 | ths | |
323 | 89c0f643 | aurel32 | if (cmd[0] != REQUEST_SENSE && |
324 | 5c6c0e51 | Hannes Reinecke | (req->lun != s->lun || (cmd[1] >> 5) != s->lun)) { |
325 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Unimplemented LUN %d\n", req->lun ? req->lun : cmd[1] >> 5); |
326 | a1f0cce2 | Hannes Reinecke | scsi_set_sense(s, SENSE_CODE(LUN_NOT_SUPPORTED)); |
327 | 2b8b3bb9 | Paolo Bonzini | r->req.status = CHECK_CONDITION; |
328 | 2b8b3bb9 | Paolo Bonzini | scsi_req_complete(&r->req); |
329 | 89c0f643 | aurel32 | return 0; |
330 | 89c0f643 | aurel32 | } |
331 | 89c0f643 | aurel32 | |
332 | 2ec749cb | Gerd Hoffmann | if (-1 == scsi_req_parse(&r->req, cmd)) { |
333 | 2ec749cb | Gerd Hoffmann | BADF("Unsupported command length, command %x\n", cmd[0]); |
334 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, -EINVAL); |
335 | 2ec749cb | Gerd Hoffmann | return 0; |
336 | 2ec749cb | Gerd Hoffmann | } |
337 | 2ec749cb | Gerd Hoffmann | scsi_req_fixup(&r->req); |
338 | 2ec749cb | Gerd Hoffmann | |
339 | aa2b1e89 | Bernhard Kohl | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
|
340 | aa2b1e89 | Bernhard Kohl | r->req.cmd.xfer, cmd[0]);
|
341 | aa2b1e89 | Bernhard Kohl | |
342 | aa2b1e89 | Bernhard Kohl | #ifdef DEBUG_SCSI
|
343 | aa2b1e89 | Bernhard Kohl | { |
344 | aa2b1e89 | Bernhard Kohl | int i;
|
345 | aa2b1e89 | Bernhard Kohl | for (i = 1; i < r->req.cmd.len; i++) { |
346 | aa2b1e89 | Bernhard Kohl | printf(" 0x%02x", cmd[i]);
|
347 | aa2b1e89 | Bernhard Kohl | } |
348 | aa2b1e89 | Bernhard Kohl | printf("\n");
|
349 | aa2b1e89 | Bernhard Kohl | } |
350 | aa2b1e89 | Bernhard Kohl | #endif
|
351 | 2cc977e2 | ths | |
352 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
353 | 2cc977e2 | ths | if (r->buf != NULL) |
354 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
355 | 2cc977e2 | ths | r->buflen = 0;
|
356 | 2cc977e2 | ths | r->buf = NULL;
|
357 | 428c149b | Christoph Hellwig | ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete); |
358 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
359 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
360 | a1f0cce2 | Hannes Reinecke | return 0; |
361 | 2cc977e2 | ths | } |
362 | 2cc977e2 | ths | return 0; |
363 | 2cc977e2 | ths | } |
364 | 2cc977e2 | ths | |
365 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
|
366 | 2cc977e2 | ths | if (r->buf != NULL) |
367 | e3c916e6 | Jean-Christophe DUBOIS | qemu_free(r->buf); |
368 | 2ec749cb | Gerd Hoffmann | r->buf = qemu_malloc(r->req.cmd.xfer); |
369 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
370 | 2cc977e2 | ths | } |
371 | 2cc977e2 | ths | |
372 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
373 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
374 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
375 | 2cc977e2 | ths | r->len = 0;
|
376 | 5c6c0e51 | Hannes Reinecke | return -r->req.cmd.xfer;
|
377 | ad2d30f7 | Paolo Bonzini | } else {
|
378 | 5c6c0e51 | Hannes Reinecke | return r->req.cmd.xfer;
|
379 | 2cc977e2 | ths | } |
380 | 2cc977e2 | ths | } |
381 | 2cc977e2 | ths | |
382 | 2cc977e2 | ths | static int get_blocksize(BlockDriverState *bdrv) |
383 | 2cc977e2 | ths | { |
384 | 2cc977e2 | ths | uint8_t cmd[10];
|
385 | 2cc977e2 | ths | uint8_t buf[8];
|
386 | 2cc977e2 | ths | uint8_t sensebuf[8];
|
387 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
388 | 2cc977e2 | ths | int ret;
|
389 | 2cc977e2 | ths | |
390 | 4f26a486 | aliguori | memset(cmd, 0, sizeof(cmd)); |
391 | 4f26a486 | aliguori | memset(buf, 0, sizeof(buf)); |
392 | 2cc977e2 | ths | cmd[0] = READ_CAPACITY;
|
393 | 2cc977e2 | ths | |
394 | 2cc977e2 | ths | memset(&io_header, 0, sizeof(io_header)); |
395 | 2cc977e2 | ths | io_header.interface_id = 'S';
|
396 | 2cc977e2 | ths | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
397 | 2cc977e2 | ths | io_header.dxfer_len = sizeof(buf);
|
398 | 2cc977e2 | ths | io_header.dxferp = buf; |
399 | 2cc977e2 | ths | io_header.cmdp = cmd; |
400 | 2cc977e2 | ths | io_header.cmd_len = sizeof(cmd);
|
401 | 2cc977e2 | ths | io_header.mx_sb_len = sizeof(sensebuf);
|
402 | 2cc977e2 | ths | io_header.sbp = sensebuf; |
403 | 2cc977e2 | ths | io_header.timeout = 6000; /* XXX */ |
404 | 2cc977e2 | ths | |
405 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
406 | 7d780669 | aliguori | if (ret < 0) |
407 | 2cc977e2 | ths | return -1; |
408 | 2cc977e2 | ths | |
409 | 2cc977e2 | ths | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
410 | 2cc977e2 | ths | } |
411 | 2cc977e2 | ths | |
412 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
413 | 89c0f643 | aurel32 | { |
414 | 89c0f643 | aurel32 | uint8_t cmd[6];
|
415 | 89c0f643 | aurel32 | uint8_t buf[12];
|
416 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
|
417 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
418 | 89c0f643 | aurel32 | int ret;
|
419 | 89c0f643 | aurel32 | |
420 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
421 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
422 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
423 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
424 | 89c0f643 | aurel32 | |
425 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
426 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
427 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
428 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
429 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
430 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
431 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
432 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
433 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
434 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
435 | 89c0f643 | aurel32 | |
436 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
437 | 7d780669 | aliguori | if (ret < 0) |
438 | 89c0f643 | aurel32 | return -1; |
439 | 89c0f643 | aurel32 | |
440 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
441 | 89c0f643 | aurel32 | } |
442 | 89c0f643 | aurel32 | |
443 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
444 | f8b6d672 | Bernhard Kohl | { |
445 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev); |
446 | f8b6d672 | Bernhard Kohl | |
447 | c557e889 | Paolo Bonzini | scsi_device_purge_requests(&s->qdev); |
448 | f8b6d672 | Bernhard Kohl | } |
449 | f8b6d672 | Bernhard Kohl | |
450 | f8b6d672 | Bernhard Kohl | static void scsi_destroy(SCSIDevice *d) |
451 | f8b6d672 | Bernhard Kohl | { |
452 | f8b6d672 | Bernhard Kohl | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d); |
453 | f8b6d672 | Bernhard Kohl | |
454 | c557e889 | Paolo Bonzini | scsi_device_purge_requests(&s->qdev); |
455 | f8b6cc00 | Markus Armbruster | blockdev_mark_auto_del(s->qdev.conf.bs); |
456 | 2cc977e2 | ths | } |
457 | 2cc977e2 | ths | |
458 | d52affa7 | Gerd Hoffmann | static int scsi_generic_initfn(SCSIDevice *dev) |
459 | 2cc977e2 | ths | { |
460 | d52affa7 | Gerd Hoffmann | SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); |
461 | 2cc977e2 | ths | int sg_version;
|
462 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
463 | 2cc977e2 | ths | |
464 | f8b6cc00 | Markus Armbruster | if (!s->qdev.conf.bs) {
|
465 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: drive property not set");
|
466 | d52affa7 | Gerd Hoffmann | return -1; |
467 | d52affa7 | Gerd Hoffmann | } |
468 | f8b6cc00 | Markus Armbruster | s->bs = s->qdev.conf.bs; |
469 | 2cc977e2 | ths | |
470 | d52affa7 | Gerd Hoffmann | /* check we are really using a /dev/sg* file */
|
471 | 428c149b | Christoph Hellwig | if (!bdrv_is_sg(s->bs)) {
|
472 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: not /dev/sg*");
|
473 | d52affa7 | Gerd Hoffmann | return -1; |
474 | d52affa7 | Gerd Hoffmann | } |
475 | 2cc977e2 | ths | |
476 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
477 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
478 | 620f862e | Markus Armbruster | return -1; |
479 | 620f862e | Markus Armbruster | } |
480 | 620f862e | Markus Armbruster | if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { |
481 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
482 | 620f862e | Markus Armbruster | return -1; |
483 | 620f862e | Markus Armbruster | } |
484 | 620f862e | Markus Armbruster | |
485 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
486 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || |
487 | d52affa7 | Gerd Hoffmann | sg_version < 30000) {
|
488 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: scsi generic interface too old");
|
489 | d52affa7 | Gerd Hoffmann | return -1; |
490 | d52affa7 | Gerd Hoffmann | } |
491 | 2cc977e2 | ths | |
492 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
493 | 428c149b | Christoph Hellwig | if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
|
494 | 1ecda02b | Markus Armbruster | error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
|
495 | d52affa7 | Gerd Hoffmann | return -1; |
496 | d52affa7 | Gerd Hoffmann | } |
497 | 2cc977e2 | ths | |
498 | 2cc977e2 | ths | /* define device state */
|
499 | 2cc977e2 | ths | s->lun = scsiid.lun; |
500 | 89c0f643 | aurel32 | DPRINTF("LUN %d\n", s->lun);
|
501 | 91376656 | Gerd Hoffmann | s->qdev.type = scsiid.scsi_type; |
502 | 91376656 | Gerd Hoffmann | DPRINTF("device type %d\n", s->qdev.type);
|
503 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_TAPE) {
|
504 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_stream_blocksize(s->bs); |
505 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize == -1) |
506 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 0;
|
507 | 89c0f643 | aurel32 | } else {
|
508 | 428c149b | Christoph Hellwig | s->qdev.blocksize = get_blocksize(s->bs); |
509 | 89c0f643 | aurel32 | /* removable media returns 0 if not present */
|
510 | b07995e3 | Gerd Hoffmann | if (s->qdev.blocksize <= 0) { |
511 | 91376656 | Gerd Hoffmann | if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
|
512 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 2048;
|
513 | 89c0f643 | aurel32 | else
|
514 | b07995e3 | Gerd Hoffmann | s->qdev.blocksize = 512;
|
515 | 89c0f643 | aurel32 | } |
516 | 89c0f643 | aurel32 | } |
517 | b07995e3 | Gerd Hoffmann | DPRINTF("block size %d\n", s->qdev.blocksize);
|
518 | 2cc977e2 | ths | s->driver_status = 0;
|
519 | 2cc977e2 | ths | memset(s->sensebuf, 0, sizeof(s->sensebuf)); |
520 | 7d0d6950 | Markus Armbruster | bdrv_set_removable(s->bs, 0);
|
521 | d52affa7 | Gerd Hoffmann | return 0; |
522 | d52affa7 | Gerd Hoffmann | } |
523 | 2cc977e2 | ths | |
524 | d52affa7 | Gerd Hoffmann | static SCSIDeviceInfo scsi_generic_info = {
|
525 | d52affa7 | Gerd Hoffmann | .qdev.name = "scsi-generic",
|
526 | d52affa7 | Gerd Hoffmann | .qdev.desc = "pass through generic scsi device (/dev/sg*)",
|
527 | d52affa7 | Gerd Hoffmann | .qdev.size = sizeof(SCSIGenericState),
|
528 | f8b6d672 | Bernhard Kohl | .qdev.reset = scsi_generic_reset, |
529 | d52affa7 | Gerd Hoffmann | .init = scsi_generic_initfn, |
530 | d52affa7 | Gerd Hoffmann | .destroy = scsi_destroy, |
531 | 5c6c0e51 | Hannes Reinecke | .alloc_req = scsi_new_request, |
532 | ad2d30f7 | Paolo Bonzini | .free_req = scsi_free_request, |
533 | d52affa7 | Gerd Hoffmann | .send_command = scsi_send_command, |
534 | d52affa7 | Gerd Hoffmann | .read_data = scsi_read_data, |
535 | d52affa7 | Gerd Hoffmann | .write_data = scsi_write_data, |
536 | d52affa7 | Gerd Hoffmann | .cancel_io = scsi_cancel_io, |
537 | d52affa7 | Gerd Hoffmann | .get_buf = scsi_get_buf, |
538 | d52affa7 | Gerd Hoffmann | .qdev.props = (Property[]) { |
539 | 428c149b | Christoph Hellwig | DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf), |
540 | d52affa7 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
541 | d52affa7 | Gerd Hoffmann | }, |
542 | d52affa7 | Gerd Hoffmann | }; |
543 | 2cc977e2 | ths | |
544 | d52affa7 | Gerd Hoffmann | static void scsi_generic_register_devices(void) |
545 | d52affa7 | Gerd Hoffmann | { |
546 | d52affa7 | Gerd Hoffmann | scsi_qdev_register(&scsi_generic_info); |
547 | 2cc977e2 | ths | } |
548 | d52affa7 | Gerd Hoffmann | device_init(scsi_generic_register_devices) |
549 | d52affa7 | Gerd Hoffmann | |
550 | 2cc977e2 | ths | #endif /* __linux__ */ |