root / hw / scsi-generic.c @ 03a6b667
History | View | Annotate | Download (14 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 | 8e31bf38 | Matthew Fernandez | * This code is licensed 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 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DRIVER_TIMEOUT 0x06 |
43 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DRIVER_SENSE 0x08 |
44 | a3b16e71 | Paolo Bonzini | |
45 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_OK 0x00 |
46 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_NO_CONNECT 0x01 |
47 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_BUS_BUSY 0x02 |
48 | a3b16e71 | Paolo Bonzini | #define SG_ERR_DID_TIME_OUT 0x03 |
49 | 2cc977e2 | ths | |
50 | 2cc977e2 | ths | #ifndef MAX_UINT
|
51 | 2cc977e2 | ths | #define MAX_UINT ((unsigned int)-1) |
52 | 2cc977e2 | ths | #endif
|
53 | 2cc977e2 | ths | |
54 | 4c41d2ef | Gerd Hoffmann | typedef struct SCSIGenericReq { |
55 | 4c41d2ef | Gerd Hoffmann | SCSIRequest req; |
56 | 2cc977e2 | ths | uint8_t *buf; |
57 | 2cc977e2 | ths | int buflen;
|
58 | 2cc977e2 | ths | int len;
|
59 | 2cc977e2 | ths | sg_io_hdr_t io_header; |
60 | 4c41d2ef | Gerd Hoffmann | } SCSIGenericReq; |
61 | 2cc977e2 | ths | |
62 | 56b1fc48 | Paolo Bonzini | static void scsi_generic_save_request(QEMUFile *f, SCSIRequest *req) |
63 | 56b1fc48 | Paolo Bonzini | { |
64 | 56b1fc48 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
65 | 56b1fc48 | Paolo Bonzini | |
66 | 56b1fc48 | Paolo Bonzini | qemu_put_sbe32s(f, &r->buflen); |
67 | 56b1fc48 | Paolo Bonzini | if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
68 | 56b1fc48 | Paolo Bonzini | assert(!r->req.sg); |
69 | 56b1fc48 | Paolo Bonzini | qemu_put_buffer(f, r->buf, r->req.cmd.xfer); |
70 | 56b1fc48 | Paolo Bonzini | } |
71 | 56b1fc48 | Paolo Bonzini | } |
72 | 56b1fc48 | Paolo Bonzini | |
73 | 56b1fc48 | Paolo Bonzini | static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req) |
74 | 56b1fc48 | Paolo Bonzini | { |
75 | 56b1fc48 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
76 | 56b1fc48 | Paolo Bonzini | |
77 | 56b1fc48 | Paolo Bonzini | qemu_get_sbe32s(f, &r->buflen); |
78 | 56b1fc48 | Paolo Bonzini | if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
79 | 56b1fc48 | Paolo Bonzini | assert(!r->req.sg); |
80 | 56b1fc48 | Paolo Bonzini | qemu_get_buffer(f, r->buf, r->req.cmd.xfer); |
81 | 56b1fc48 | Paolo Bonzini | } |
82 | 56b1fc48 | Paolo Bonzini | } |
83 | 56b1fc48 | Paolo Bonzini | |
84 | ad2d30f7 | Paolo Bonzini | static void scsi_free_request(SCSIRequest *req) |
85 | 2cc977e2 | ths | { |
86 | ad2d30f7 | Paolo Bonzini | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
87 | ad2d30f7 | Paolo Bonzini | |
88 | 7267c094 | Anthony Liguori | g_free(r->buf); |
89 | 2cc977e2 | ths | } |
90 | 2cc977e2 | ths | |
91 | 2cc977e2 | ths | /* Helper function for command completion. */
|
92 | 2cc977e2 | ths | static void scsi_command_complete(void *opaque, int ret) |
93 | 2cc977e2 | ths | { |
94 | 682a9b21 | Paolo Bonzini | int status;
|
95 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
96 | 2cc977e2 | ths | |
97 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
98 | a3b16e71 | Paolo Bonzini | if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
|
99 | b45ef674 | Paolo Bonzini | r->req.sense_len = r->io_header.sb_len_wr; |
100 | a3b16e71 | Paolo Bonzini | } |
101 | 89c0f643 | aurel32 | |
102 | a1f0cce2 | Hannes Reinecke | if (ret != 0) { |
103 | a1f0cce2 | Hannes Reinecke | switch (ret) {
|
104 | 2e7cc4d6 | Paolo Bonzini | case -EDOM:
|
105 | 682a9b21 | Paolo Bonzini | status = TASK_SET_FULL; |
106 | 2e7cc4d6 | Paolo Bonzini | break;
|
107 | a1f0cce2 | Hannes Reinecke | case -ENOMEM:
|
108 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
109 | b45ef674 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE)); |
110 | a1f0cce2 | Hannes Reinecke | break;
|
111 | a1f0cce2 | Hannes Reinecke | default:
|
112 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
113 | b45ef674 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR)); |
114 | a1f0cce2 | Hannes Reinecke | break;
|
115 | a1f0cce2 | Hannes Reinecke | } |
116 | a1f0cce2 | Hannes Reinecke | } else {
|
117 | a3b16e71 | Paolo Bonzini | if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
|
118 | a3b16e71 | Paolo Bonzini | r->io_header.host_status == SG_ERR_DID_BUS_BUSY || |
119 | a3b16e71 | Paolo Bonzini | r->io_header.host_status == SG_ERR_DID_TIME_OUT || |
120 | a3b16e71 | Paolo Bonzini | (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) { |
121 | 682a9b21 | Paolo Bonzini | status = BUSY; |
122 | 2cc977e2 | ths | BADF("Driver Timeout\n");
|
123 | a3b16e71 | Paolo Bonzini | } else if (r->io_header.host_status) { |
124 | a3b16e71 | Paolo Bonzini | status = CHECK_CONDITION; |
125 | a3b16e71 | Paolo Bonzini | scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS)); |
126 | 682a9b21 | Paolo Bonzini | } else if (r->io_header.status) { |
127 | 682a9b21 | Paolo Bonzini | status = r->io_header.status; |
128 | b45ef674 | Paolo Bonzini | } else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) { |
129 | 682a9b21 | Paolo Bonzini | status = CHECK_CONDITION; |
130 | 682a9b21 | Paolo Bonzini | } else {
|
131 | 682a9b21 | Paolo Bonzini | status = GOOD; |
132 | 682a9b21 | Paolo Bonzini | } |
133 | 2cc977e2 | ths | } |
134 | 89c0f643 | aurel32 | DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
|
135 | 682a9b21 | Paolo Bonzini | r, r->req.tag, status); |
136 | ed3a34a3 | Gerd Hoffmann | |
137 | 682a9b21 | Paolo Bonzini | scsi_req_complete(&r->req, status); |
138 | c9501c95 | Paolo Bonzini | if (!r->req.io_canceled) {
|
139 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
140 | c9501c95 | Paolo Bonzini | } |
141 | 2cc977e2 | ths | } |
142 | 2cc977e2 | ths | |
143 | 2cc977e2 | ths | /* Cancel a pending data transfer. */
|
144 | 5c6c0e51 | Hannes Reinecke | static void scsi_cancel_io(SCSIRequest *req) |
145 | 2cc977e2 | ths | { |
146 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
147 | 5c6c0e51 | Hannes Reinecke | |
148 | 5c6c0e51 | Hannes Reinecke | DPRINTF("Cancel tag=0x%x\n", req->tag);
|
149 | 5c6c0e51 | Hannes Reinecke | if (r->req.aiocb) {
|
150 | 5c6c0e51 | Hannes Reinecke | bdrv_aio_cancel(r->req.aiocb); |
151 | c9501c95 | Paolo Bonzini | |
152 | c9501c95 | Paolo Bonzini | /* This reference was left in by scsi_*_data. We take ownership of
|
153 | c9501c95 | Paolo Bonzini | * it independent of whether bdrv_aio_cancel completes the request
|
154 | c9501c95 | Paolo Bonzini | * or not. */
|
155 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
156 | 2cc977e2 | ths | } |
157 | 5c6c0e51 | Hannes Reinecke | r->req.aiocb = NULL;
|
158 | 2cc977e2 | ths | } |
159 | 2cc977e2 | ths | |
160 | 2cc977e2 | ths | static int execute_command(BlockDriverState *bdrv, |
161 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r, int direction,
|
162 | 2cc977e2 | ths | BlockDriverCompletionFunc *complete) |
163 | 2cc977e2 | ths | { |
164 | 2cc977e2 | ths | r->io_header.interface_id = 'S';
|
165 | 2cc977e2 | ths | r->io_header.dxfer_direction = direction; |
166 | 2cc977e2 | ths | r->io_header.dxferp = r->buf; |
167 | 2cc977e2 | ths | r->io_header.dxfer_len = r->buflen; |
168 | 29362ebe | Gerd Hoffmann | r->io_header.cmdp = r->req.cmd.buf; |
169 | 29362ebe | Gerd Hoffmann | r->io_header.cmd_len = r->req.cmd.len; |
170 | b45ef674 | Paolo Bonzini | r->io_header.mx_sb_len = sizeof(r->req.sense);
|
171 | b45ef674 | Paolo Bonzini | r->io_header.sbp = r->req.sense; |
172 | 2cc977e2 | ths | r->io_header.timeout = MAX_UINT; |
173 | 2cc977e2 | ths | r->io_header.usr_ptr = r; |
174 | 2cc977e2 | ths | r->io_header.flags |= SG_FLAG_DIRECT_IO; |
175 | 2cc977e2 | ths | |
176 | 4c41d2ef | Gerd Hoffmann | r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); |
177 | 2cc977e2 | ths | |
178 | 2cc977e2 | ths | return 0; |
179 | 2cc977e2 | ths | } |
180 | 2cc977e2 | ths | |
181 | 2cc977e2 | ths | static void scsi_read_complete(void * opaque, int ret) |
182 | 2cc977e2 | ths | { |
183 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
184 | 9b6eef8a | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
185 | 2cc977e2 | ths | int len;
|
186 | 2cc977e2 | ths | |
187 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
188 | 2cc977e2 | ths | if (ret) {
|
189 | aa2b1e89 | Bernhard Kohl | DPRINTF("IO error ret %d\n", ret);
|
190 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
191 | 2cc977e2 | ths | return;
|
192 | 2cc977e2 | ths | } |
193 | 2cc977e2 | ths | len = r->io_header.dxfer_len - r->io_header.resid; |
194 | 4c41d2ef | Gerd Hoffmann | DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
|
195 | 2cc977e2 | ths | |
196 | 2cc977e2 | ths | r->len = -1;
|
197 | 40f16dd1 | Paolo Bonzini | if (len == 0) { |
198 | 89c0f643 | aurel32 | scsi_command_complete(r, 0);
|
199 | 40f16dd1 | Paolo Bonzini | } else {
|
200 | 9b6eef8a | Paolo Bonzini | /* Snoop READ CAPACITY output to set the blocksize. */
|
201 | 9b6eef8a | Paolo Bonzini | if (r->req.cmd.buf[0] == READ_CAPACITY_10) { |
202 | 9b6eef8a | Paolo Bonzini | s->blocksize = ldl_be_p(&r->buf[4]);
|
203 | 7877903a | Paolo Bonzini | s->max_lba = ldl_be_p(&r->buf[0]);
|
204 | 9b6eef8a | Paolo Bonzini | } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 && |
205 | 9b6eef8a | Paolo Bonzini | (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { |
206 | 9b6eef8a | Paolo Bonzini | s->blocksize = ldl_be_p(&r->buf[8]);
|
207 | 7877903a | Paolo Bonzini | s->max_lba = ldq_be_p(&r->buf[0]);
|
208 | 9b6eef8a | Paolo Bonzini | } |
209 | 9b6eef8a | Paolo Bonzini | bdrv_set_buffer_alignment(s->conf.bs, s->blocksize); |
210 | 9b6eef8a | Paolo Bonzini | |
211 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, len); |
212 | c9501c95 | Paolo Bonzini | if (!r->req.io_canceled) {
|
213 | c9501c95 | Paolo Bonzini | scsi_req_unref(&r->req); |
214 | c9501c95 | Paolo Bonzini | } |
215 | 40f16dd1 | Paolo Bonzini | } |
216 | 2cc977e2 | ths | } |
217 | 2cc977e2 | ths | |
218 | 2cc977e2 | ths | /* Read more data from scsi device into buffer. */
|
219 | 5c6c0e51 | Hannes Reinecke | static void scsi_read_data(SCSIRequest *req) |
220 | 2cc977e2 | ths | { |
221 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
222 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
223 | 2cc977e2 | ths | int ret;
|
224 | 2cc977e2 | ths | |
225 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_read_data 0x%x\n", req->tag);
|
226 | c9501c95 | Paolo Bonzini | |
227 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
|
228 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
229 | 2cc977e2 | ths | if (r->len == -1) { |
230 | 2cc977e2 | ths | scsi_command_complete(r, 0);
|
231 | 2cc977e2 | ths | return;
|
232 | 2cc977e2 | ths | } |
233 | 2cc977e2 | ths | |
234 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_FROM_DEV, scsi_read_complete); |
235 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
236 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
237 | 2cc977e2 | ths | } |
238 | 2cc977e2 | ths | } |
239 | 2cc977e2 | ths | |
240 | 2cc977e2 | ths | static void scsi_write_complete(void * opaque, int ret) |
241 | 2cc977e2 | ths | { |
242 | 4c41d2ef | Gerd Hoffmann | SCSIGenericReq *r = (SCSIGenericReq *)opaque; |
243 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
244 | 2cc977e2 | ths | |
245 | 2cc977e2 | ths | DPRINTF("scsi_write_complete() ret = %d\n", ret);
|
246 | d33e0ce2 | Paolo Bonzini | r->req.aiocb = NULL;
|
247 | 2cc977e2 | ths | if (ret) {
|
248 | 2cc977e2 | ths | DPRINTF("IO error\n");
|
249 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
250 | 2cc977e2 | ths | return;
|
251 | 2cc977e2 | ths | } |
252 | 2cc977e2 | ths | |
253 | 29362ebe | Gerd Hoffmann | if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 && |
254 | 8869e103 | Paolo Bonzini | s->type == TYPE_TAPE) { |
255 | 8869e103 | Paolo Bonzini | s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11]; |
256 | 8869e103 | Paolo Bonzini | DPRINTF("block size %d\n", s->blocksize);
|
257 | 89c0f643 | aurel32 | } |
258 | 89c0f643 | aurel32 | |
259 | 2cc977e2 | ths | scsi_command_complete(r, ret); |
260 | 2cc977e2 | ths | } |
261 | 2cc977e2 | ths | |
262 | 2cc977e2 | ths | /* Write data to a scsi device. Returns nonzero on failure.
|
263 | 2cc977e2 | ths | The transfer may complete asynchronously. */
|
264 | 42741212 | Paolo Bonzini | static void scsi_write_data(SCSIRequest *req) |
265 | 2cc977e2 | ths | { |
266 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
267 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
268 | 2cc977e2 | ths | int ret;
|
269 | 2cc977e2 | ths | |
270 | 5c6c0e51 | Hannes Reinecke | DPRINTF("scsi_write_data 0x%x\n", req->tag);
|
271 | 2cc977e2 | ths | if (r->len == 0) { |
272 | 2cc977e2 | ths | r->len = r->buflen; |
273 | ab9adc88 | Paolo Bonzini | scsi_req_data(&r->req, r->len); |
274 | 42741212 | Paolo Bonzini | return;
|
275 | 2cc977e2 | ths | } |
276 | 2cc977e2 | ths | |
277 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
|
278 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
279 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_TO_DEV, scsi_write_complete); |
280 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
281 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
282 | 2cc977e2 | ths | } |
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 | 2cc977e2 | ths | /* Execute a scsi command. Returns the length of the data expected by the
|
294 | 2cc977e2 | ths | command. This will be Positive for data transfers from the device
|
295 | 2cc977e2 | ths | (eg. disk reads), negative for transfers to the device (eg. disk writes),
|
296 | 2cc977e2 | ths | and zero if the command does not transfer any data. */
|
297 | 2cc977e2 | ths | |
298 | 5c6c0e51 | Hannes Reinecke | static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
|
299 | 2cc977e2 | ths | { |
300 | 5c6c0e51 | Hannes Reinecke | SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req); |
301 | 8869e103 | Paolo Bonzini | SCSIDevice *s = r->req.dev; |
302 | 2cc977e2 | ths | int ret;
|
303 | 2cc977e2 | ths | |
304 | aa2b1e89 | Bernhard Kohl | DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
|
305 | aa2b1e89 | Bernhard Kohl | r->req.cmd.xfer, cmd[0]);
|
306 | aa2b1e89 | Bernhard Kohl | |
307 | aa2b1e89 | Bernhard Kohl | #ifdef DEBUG_SCSI
|
308 | aa2b1e89 | Bernhard Kohl | { |
309 | aa2b1e89 | Bernhard Kohl | int i;
|
310 | aa2b1e89 | Bernhard Kohl | for (i = 1; i < r->req.cmd.len; i++) { |
311 | aa2b1e89 | Bernhard Kohl | printf(" 0x%02x", cmd[i]);
|
312 | aa2b1e89 | Bernhard Kohl | } |
313 | aa2b1e89 | Bernhard Kohl | printf("\n");
|
314 | aa2b1e89 | Bernhard Kohl | } |
315 | aa2b1e89 | Bernhard Kohl | #endif
|
316 | 2cc977e2 | ths | |
317 | 2ec749cb | Gerd Hoffmann | if (r->req.cmd.xfer == 0) { |
318 | 2cc977e2 | ths | if (r->buf != NULL) |
319 | 7267c094 | Anthony Liguori | g_free(r->buf); |
320 | 2cc977e2 | ths | r->buflen = 0;
|
321 | 2cc977e2 | ths | r->buf = NULL;
|
322 | c9501c95 | Paolo Bonzini | /* The request is used as the AIO opaque value, so add a ref. */
|
323 | c9501c95 | Paolo Bonzini | scsi_req_ref(&r->req); |
324 | 8869e103 | Paolo Bonzini | ret = execute_command(s->conf.bs, r, SG_DXFER_NONE, scsi_command_complete); |
325 | a1f0cce2 | Hannes Reinecke | if (ret < 0) { |
326 | a1f0cce2 | Hannes Reinecke | scsi_command_complete(r, ret); |
327 | a1f0cce2 | Hannes Reinecke | return 0; |
328 | 2cc977e2 | ths | } |
329 | 2cc977e2 | ths | return 0; |
330 | 2cc977e2 | ths | } |
331 | 2cc977e2 | ths | |
332 | 2ec749cb | Gerd Hoffmann | if (r->buflen != r->req.cmd.xfer) {
|
333 | 2cc977e2 | ths | if (r->buf != NULL) |
334 | 7267c094 | Anthony Liguori | g_free(r->buf); |
335 | 7267c094 | Anthony Liguori | r->buf = g_malloc(r->req.cmd.xfer); |
336 | 2ec749cb | Gerd Hoffmann | r->buflen = r->req.cmd.xfer; |
337 | 2cc977e2 | ths | } |
338 | 2cc977e2 | ths | |
339 | 2cc977e2 | ths | memset(r->buf, 0, r->buflen);
|
340 | 2ec749cb | Gerd Hoffmann | r->len = r->req.cmd.xfer; |
341 | 97a06435 | Gerd Hoffmann | if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
342 | 2cc977e2 | ths | r->len = 0;
|
343 | 5c6c0e51 | Hannes Reinecke | return -r->req.cmd.xfer;
|
344 | ad2d30f7 | Paolo Bonzini | } else {
|
345 | 5c6c0e51 | Hannes Reinecke | return r->req.cmd.xfer;
|
346 | 2cc977e2 | ths | } |
347 | 2cc977e2 | ths | } |
348 | 2cc977e2 | ths | |
349 | 89c0f643 | aurel32 | static int get_stream_blocksize(BlockDriverState *bdrv) |
350 | 89c0f643 | aurel32 | { |
351 | 89c0f643 | aurel32 | uint8_t cmd[6];
|
352 | 89c0f643 | aurel32 | uint8_t buf[12];
|
353 | 89c0f643 | aurel32 | uint8_t sensebuf[8];
|
354 | 89c0f643 | aurel32 | sg_io_hdr_t io_header; |
355 | 89c0f643 | aurel32 | int ret;
|
356 | 89c0f643 | aurel32 | |
357 | 89c0f643 | aurel32 | memset(cmd, 0, sizeof(cmd)); |
358 | 89c0f643 | aurel32 | memset(buf, 0, sizeof(buf)); |
359 | 89c0f643 | aurel32 | cmd[0] = MODE_SENSE;
|
360 | 89c0f643 | aurel32 | cmd[4] = sizeof(buf); |
361 | 89c0f643 | aurel32 | |
362 | 89c0f643 | aurel32 | memset(&io_header, 0, sizeof(io_header)); |
363 | 89c0f643 | aurel32 | io_header.interface_id = 'S';
|
364 | 89c0f643 | aurel32 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; |
365 | 89c0f643 | aurel32 | io_header.dxfer_len = sizeof(buf);
|
366 | 89c0f643 | aurel32 | io_header.dxferp = buf; |
367 | 89c0f643 | aurel32 | io_header.cmdp = cmd; |
368 | 89c0f643 | aurel32 | io_header.cmd_len = sizeof(cmd);
|
369 | 89c0f643 | aurel32 | io_header.mx_sb_len = sizeof(sensebuf);
|
370 | 89c0f643 | aurel32 | io_header.sbp = sensebuf; |
371 | 89c0f643 | aurel32 | io_header.timeout = 6000; /* XXX */ |
372 | 89c0f643 | aurel32 | |
373 | 221f715d | aliguori | ret = bdrv_ioctl(bdrv, SG_IO, &io_header); |
374 | fe0ed712 | Paolo Bonzini | if (ret < 0 || io_header.driver_status || io_header.host_status) { |
375 | 89c0f643 | aurel32 | return -1; |
376 | fe0ed712 | Paolo Bonzini | } |
377 | 89c0f643 | aurel32 | return (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
378 | 89c0f643 | aurel32 | } |
379 | 89c0f643 | aurel32 | |
380 | f8b6d672 | Bernhard Kohl | static void scsi_generic_reset(DeviceState *dev) |
381 | f8b6d672 | Bernhard Kohl | { |
382 | b9eea3e6 | Anthony Liguori | SCSIDevice *s = SCSI_DEVICE(dev); |
383 | f8b6d672 | Bernhard Kohl | |
384 | 8869e103 | Paolo Bonzini | scsi_device_purge_requests(s, SENSE_CODE(RESET)); |
385 | f8b6d672 | Bernhard Kohl | } |
386 | f8b6d672 | Bernhard Kohl | |
387 | 8869e103 | Paolo Bonzini | static void scsi_destroy(SCSIDevice *s) |
388 | f8b6d672 | Bernhard Kohl | { |
389 | 8869e103 | Paolo Bonzini | scsi_device_purge_requests(s, SENSE_CODE(NO_SENSE)); |
390 | 8869e103 | Paolo Bonzini | blockdev_mark_auto_del(s->conf.bs); |
391 | 2cc977e2 | ths | } |
392 | 2cc977e2 | ths | |
393 | 8869e103 | Paolo Bonzini | static int scsi_generic_initfn(SCSIDevice *s) |
394 | 2cc977e2 | ths | { |
395 | 2cc977e2 | ths | int sg_version;
|
396 | 2cc977e2 | ths | struct sg_scsi_id scsiid;
|
397 | 2cc977e2 | ths | |
398 | 8869e103 | Paolo Bonzini | if (!s->conf.bs) {
|
399 | 6a84cb1f | Markus Armbruster | error_report("drive property not set");
|
400 | d52affa7 | Gerd Hoffmann | return -1; |
401 | d52affa7 | Gerd Hoffmann | } |
402 | 2cc977e2 | ths | |
403 | 8869e103 | Paolo Bonzini | if (bdrv_get_on_error(s->conf.bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
404 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option werror");
|
405 | 620f862e | Markus Armbruster | return -1; |
406 | 620f862e | Markus Armbruster | } |
407 | 8869e103 | Paolo Bonzini | if (bdrv_get_on_error(s->conf.bs, 1) != BLOCK_ERR_REPORT) { |
408 | 620f862e | Markus Armbruster | error_report("Device doesn't support drive option rerror");
|
409 | 620f862e | Markus Armbruster | return -1; |
410 | 620f862e | Markus Armbruster | } |
411 | 620f862e | Markus Armbruster | |
412 | 2cc977e2 | ths | /* check we are using a driver managing SG_IO (version 3 and after */
|
413 | 98392453 | Ronnie Sahlberg | if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0) { |
414 | 98392453 | Ronnie Sahlberg | error_report("scsi generic interface not supported");
|
415 | 98392453 | Ronnie Sahlberg | return -1; |
416 | 98392453 | Ronnie Sahlberg | } |
417 | 98392453 | Ronnie Sahlberg | if (sg_version < 30000) { |
418 | 6a84cb1f | Markus Armbruster | error_report("scsi generic interface too old");
|
419 | d52affa7 | Gerd Hoffmann | return -1; |
420 | d52affa7 | Gerd Hoffmann | } |
421 | 2cc977e2 | ths | |
422 | 2cc977e2 | ths | /* get LUN of the /dev/sg? */
|
423 | 8869e103 | Paolo Bonzini | if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
|
424 | 6a84cb1f | Markus Armbruster | error_report("SG_GET_SCSI_ID ioctl failed");
|
425 | d52affa7 | Gerd Hoffmann | return -1; |
426 | d52affa7 | Gerd Hoffmann | } |
427 | 2cc977e2 | ths | |
428 | 2cc977e2 | ths | /* define device state */
|
429 | 8869e103 | Paolo Bonzini | s->type = scsiid.scsi_type; |
430 | 8869e103 | Paolo Bonzini | DPRINTF("device type %d\n", s->type);
|
431 | 28b77657 | Paolo Bonzini | if (s->type == TYPE_DISK || s->type == TYPE_ROM) {
|
432 | 28b77657 | Paolo Bonzini | add_boot_device_path(s->conf.bootindex, &s->qdev, NULL);
|
433 | 28b77657 | Paolo Bonzini | } |
434 | 28b77657 | Paolo Bonzini | |
435 | 9b6eef8a | Paolo Bonzini | switch (s->type) {
|
436 | 9b6eef8a | Paolo Bonzini | case TYPE_TAPE:
|
437 | 8869e103 | Paolo Bonzini | s->blocksize = get_stream_blocksize(s->conf.bs); |
438 | 8869e103 | Paolo Bonzini | if (s->blocksize == -1) { |
439 | 8869e103 | Paolo Bonzini | s->blocksize = 0;
|
440 | 8869e103 | Paolo Bonzini | } |
441 | 9b6eef8a | Paolo Bonzini | break;
|
442 | 9b6eef8a | Paolo Bonzini | |
443 | 9b6eef8a | Paolo Bonzini | /* Make a guess for block devices, we'll fix it when the guest sends.
|
444 | 9b6eef8a | Paolo Bonzini | * READ CAPACITY. If they don't, they likely would assume these sizes
|
445 | 9b6eef8a | Paolo Bonzini | * anyway. (TODO: they could also send MODE SENSE).
|
446 | 9b6eef8a | Paolo Bonzini | */
|
447 | 9b6eef8a | Paolo Bonzini | case TYPE_ROM:
|
448 | 9b6eef8a | Paolo Bonzini | case TYPE_WORM:
|
449 | 9b6eef8a | Paolo Bonzini | s->blocksize = 2048;
|
450 | 9b6eef8a | Paolo Bonzini | break;
|
451 | 9b6eef8a | Paolo Bonzini | default:
|
452 | 9b6eef8a | Paolo Bonzini | s->blocksize = 512;
|
453 | 9b6eef8a | Paolo Bonzini | break;
|
454 | 89c0f643 | aurel32 | } |
455 | 8869e103 | Paolo Bonzini | |
456 | 8869e103 | Paolo Bonzini | DPRINTF("block size %d\n", s->blocksize);
|
457 | d52affa7 | Gerd Hoffmann | return 0; |
458 | d52affa7 | Gerd Hoffmann | } |
459 | 2cc977e2 | ths | |
460 | 765d1525 | Paolo Bonzini | const SCSIReqOps scsi_generic_req_ops = {
|
461 | 8dbd4574 | Paolo Bonzini | .size = sizeof(SCSIGenericReq),
|
462 | 12010e7b | Paolo Bonzini | .free_req = scsi_free_request, |
463 | 12010e7b | Paolo Bonzini | .send_command = scsi_send_command, |
464 | 12010e7b | Paolo Bonzini | .read_data = scsi_read_data, |
465 | 12010e7b | Paolo Bonzini | .write_data = scsi_write_data, |
466 | 12010e7b | Paolo Bonzini | .cancel_io = scsi_cancel_io, |
467 | 12010e7b | Paolo Bonzini | .get_buf = scsi_get_buf, |
468 | 56b1fc48 | Paolo Bonzini | .load_request = scsi_generic_load_request, |
469 | 56b1fc48 | Paolo Bonzini | .save_request = scsi_generic_save_request, |
470 | 8dbd4574 | Paolo Bonzini | }; |
471 | 8dbd4574 | Paolo Bonzini | |
472 | 8dbd4574 | Paolo Bonzini | static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
|
473 | 63db0f0e | Paolo Bonzini | uint8_t *buf, void *hba_private)
|
474 | 8dbd4574 | Paolo Bonzini | { |
475 | 8dbd4574 | Paolo Bonzini | SCSIRequest *req; |
476 | 8dbd4574 | Paolo Bonzini | |
477 | 8dbd4574 | Paolo Bonzini | req = scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private); |
478 | 8dbd4574 | Paolo Bonzini | return req;
|
479 | 8dbd4574 | Paolo Bonzini | } |
480 | 8dbd4574 | Paolo Bonzini | |
481 | 39bffca2 | Anthony Liguori | static Property scsi_generic_properties[] = {
|
482 | 39bffca2 | Anthony Liguori | DEFINE_BLOCK_PROPERTIES(SCSIDevice, conf), |
483 | 39bffca2 | Anthony Liguori | DEFINE_PROP_END_OF_LIST(), |
484 | 39bffca2 | Anthony Liguori | }; |
485 | 39bffca2 | Anthony Liguori | |
486 | b9eea3e6 | Anthony Liguori | static void scsi_generic_class_initfn(ObjectClass *klass, void *data) |
487 | b9eea3e6 | Anthony Liguori | { |
488 | 39bffca2 | Anthony Liguori | DeviceClass *dc = DEVICE_CLASS(klass); |
489 | b9eea3e6 | Anthony Liguori | SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); |
490 | b9eea3e6 | Anthony Liguori | |
491 | b9eea3e6 | Anthony Liguori | sc->init = scsi_generic_initfn; |
492 | b9eea3e6 | Anthony Liguori | sc->destroy = scsi_destroy; |
493 | b9eea3e6 | Anthony Liguori | sc->alloc_req = scsi_new_request; |
494 | 39bffca2 | Anthony Liguori | dc->fw_name = "disk";
|
495 | 39bffca2 | Anthony Liguori | dc->desc = "pass through generic scsi device (/dev/sg*)";
|
496 | 39bffca2 | Anthony Liguori | dc->reset = scsi_generic_reset; |
497 | 39bffca2 | Anthony Liguori | dc->props = scsi_generic_properties; |
498 | 56b1fc48 | Paolo Bonzini | dc->vmsd = &vmstate_scsi_device; |
499 | b9eea3e6 | Anthony Liguori | } |
500 | b9eea3e6 | Anthony Liguori | |
501 | 39bffca2 | Anthony Liguori | static TypeInfo scsi_generic_info = {
|
502 | 39bffca2 | Anthony Liguori | .name = "scsi-generic",
|
503 | 39bffca2 | Anthony Liguori | .parent = TYPE_SCSI_DEVICE, |
504 | 39bffca2 | Anthony Liguori | .instance_size = sizeof(SCSIDevice),
|
505 | 39bffca2 | Anthony Liguori | .class_init = scsi_generic_class_initfn, |
506 | d52affa7 | Gerd Hoffmann | }; |
507 | 2cc977e2 | ths | |
508 | 83f7d43a | Andreas Färber | static void scsi_generic_register_types(void) |
509 | d52affa7 | Gerd Hoffmann | { |
510 | 39bffca2 | Anthony Liguori | type_register_static(&scsi_generic_info); |
511 | 2cc977e2 | ths | } |
512 | 83f7d43a | Andreas Färber | |
513 | 83f7d43a | Andreas Färber | type_init(scsi_generic_register_types) |
514 | d52affa7 | Gerd Hoffmann | |
515 | 2cc977e2 | ths | #endif /* __linux__ */ |