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Commit | Line | Data |
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973abc7f SH |
1 | /* |
2 | * Virtio SCSI HBA | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * Copyright Red Hat, Inc. 2011 | |
6 | * | |
7 | * Authors: | |
8 | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | |
9 | * Paolo Bonzini <pbonzini@redhat.com> | |
10 | * | |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
12 | * See the COPYING file in the top-level directory. | |
13 | * | |
14 | */ | |
15 | ||
9b8bfe21 | 16 | #include "qemu/osdep.h" |
da34e65c | 17 | #include "qapi/error.h" |
019adbd3 | 18 | #include "standard-headers/linux/virtio_ids.h" |
0d09e41a | 19 | #include "hw/virtio/virtio-scsi.h" |
b4a42f81 | 20 | #include "qemu/error-report.h" |
36b15c79 | 21 | #include "qemu/iov.h" |
4be74634 | 22 | #include "sysemu/block-backend.h" |
a9c94277 MA |
23 | #include "hw/scsi/scsi.h" |
24 | #include "block/scsi.h" | |
25 | #include "hw/virtio/virtio-bus.h" | |
8c085dbe | 26 | #include "hw/virtio/virtio-access.h" |
973abc7f | 27 | |
2ccdcd8d PB |
28 | static inline int virtio_scsi_get_lun(uint8_t *lun) |
29 | { | |
30 | return ((lun[2] << 8) | lun[3]) & 0x3FFF; | |
31 | } | |
32 | ||
33 | static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) | |
34 | { | |
35 | if (lun[0] != 1) { | |
36 | return NULL; | |
37 | } | |
38 | if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { | |
39 | return NULL; | |
40 | } | |
41 | return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); | |
42 | } | |
43 | ||
51b19ebe | 44 | void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req) |
36b15c79 | 45 | { |
e24a47c5 PB |
46 | const size_t zero_skip = |
47 | offsetof(VirtIOSCSIReq, resp_iov) + sizeof(req->resp_iov); | |
36b15c79 PB |
48 | |
49 | req->vq = vq; | |
50 | req->dev = s; | |
36b15c79 | 51 | qemu_sglist_init(&req->qsgl, DEVICE(s), 8, &address_space_memory); |
3eff1f46 | 52 | qemu_iovec_init(&req->resp_iov, 1); |
faf1e1fb | 53 | memset((uint8_t *)req + zero_skip, 0, sizeof(*req) - zero_skip); |
36b15c79 PB |
54 | } |
55 | ||
aa8e8f83 | 56 | void virtio_scsi_free_req(VirtIOSCSIReq *req) |
36b15c79 | 57 | { |
3eff1f46 | 58 | qemu_iovec_destroy(&req->resp_iov); |
36b15c79 | 59 | qemu_sglist_destroy(&req->qsgl); |
633dccb4 | 60 | g_free(req); |
36b15c79 PB |
61 | } |
62 | ||
326799c0 SH |
63 | static void virtio_scsi_complete_req(VirtIOSCSIReq *req) |
64 | { | |
65 | VirtIOSCSI *s = req->dev; | |
66 | VirtQueue *vq = req->vq; | |
0ac8e139 | 67 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
3eff1f46 PB |
68 | |
69 | qemu_iovec_from_buf(&req->resp_iov, 0, &req->resp, req->resp_size); | |
e24a47c5 | 70 | virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size); |
43c696a2 | 71 | if (s->dataplane_started && !s->dataplane_fenced) { |
e24a47c5 | 72 | virtio_scsi_dataplane_notify(vdev, req); |
63c7e542 | 73 | } else { |
63c7e542 FZ |
74 | virtio_notify(vdev, vq); |
75 | } | |
76 | ||
326799c0 SH |
77 | if (req->sreq) { |
78 | req->sreq->hba_private = NULL; | |
79 | scsi_req_unref(req->sreq); | |
80 | } | |
36b15c79 | 81 | virtio_scsi_free_req(req); |
326799c0 SH |
82 | } |
83 | ||
661e32fb | 84 | static void virtio_scsi_bad_req(VirtIOSCSIReq *req) |
326799c0 | 85 | { |
661e32fb GK |
86 | virtio_error(VIRTIO_DEVICE(req->dev), "wrong size for virtio-scsi headers"); |
87 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
88 | virtio_scsi_free_req(req); | |
326799c0 SH |
89 | } |
90 | ||
57fbae6e PB |
91 | static size_t qemu_sgl_concat(VirtIOSCSIReq *req, struct iovec *iov, |
92 | hwaddr *addr, int num, size_t skip) | |
326799c0 | 93 | { |
f487b677 | 94 | QEMUSGList *qsgl = &req->qsgl; |
57fbae6e PB |
95 | size_t copied = 0; |
96 | ||
97 | while (num) { | |
98 | if (skip >= iov->iov_len) { | |
99 | skip -= iov->iov_len; | |
100 | } else { | |
101 | qemu_sglist_add(qsgl, *addr + skip, iov->iov_len - skip); | |
102 | copied += iov->iov_len - skip; | |
103 | skip = 0; | |
104 | } | |
105 | iov++; | |
106 | addr++; | |
107 | num--; | |
326799c0 | 108 | } |
57fbae6e PB |
109 | |
110 | assert(skip == 0); | |
111 | return copied; | |
326799c0 SH |
112 | } |
113 | ||
36b15c79 PB |
114 | static int virtio_scsi_parse_req(VirtIOSCSIReq *req, |
115 | unsigned req_size, unsigned resp_size) | |
326799c0 | 116 | { |
55783a55 | 117 | VirtIODevice *vdev = (VirtIODevice *) req->dev; |
3eff1f46 | 118 | size_t in_size, out_size; |
36b15c79 | 119 | |
3eff1f46 PB |
120 | if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0, |
121 | &req->req, req_size) < req_size) { | |
36b15c79 PB |
122 | return -EINVAL; |
123 | } | |
36b15c79 | 124 | |
3eff1f46 PB |
125 | if (qemu_iovec_concat_iov(&req->resp_iov, |
126 | req->elem.in_sg, req->elem.in_num, 0, | |
127 | resp_size) < resp_size) { | |
36b15c79 PB |
128 | return -EINVAL; |
129 | } | |
55783a55 | 130 | |
489c7901 | 131 | req->resp_size = resp_size; |
326799c0 | 132 | |
55783a55 PB |
133 | /* Old BIOSes left some padding by mistake after the req_size/resp_size. |
134 | * As a workaround, always consider the first buffer as the virtio-scsi | |
135 | * request/response, making the payload start at the second element | |
136 | * of the iovec. | |
137 | * | |
138 | * The actual length of the response header, stored in req->resp_size, | |
139 | * does not change. | |
140 | * | |
141 | * TODO: always disable this workaround for virtio 1.0 devices. | |
142 | */ | |
95129d6f | 143 | if (!virtio_vdev_has_feature(vdev, VIRTIO_F_ANY_LAYOUT)) { |
2034e324 FZ |
144 | if (req->elem.out_num) { |
145 | req_size = req->elem.out_sg[0].iov_len; | |
146 | } | |
147 | if (req->elem.in_num) { | |
148 | resp_size = req->elem.in_sg[0].iov_len; | |
149 | } | |
55783a55 PB |
150 | } |
151 | ||
3eff1f46 PB |
152 | out_size = qemu_sgl_concat(req, req->elem.out_sg, |
153 | &req->elem.out_addr[0], req->elem.out_num, | |
154 | req_size); | |
155 | in_size = qemu_sgl_concat(req, req->elem.in_sg, | |
156 | &req->elem.in_addr[0], req->elem.in_num, | |
157 | resp_size); | |
158 | ||
159 | if (out_size && in_size) { | |
160 | return -ENOTSUP; | |
161 | } | |
162 | ||
163 | if (out_size) { | |
164 | req->mode = SCSI_XFER_TO_DEV; | |
165 | } else if (in_size) { | |
166 | req->mode = SCSI_XFER_FROM_DEV; | |
326799c0 | 167 | } |
36b15c79 PB |
168 | |
169 | return 0; | |
326799c0 SH |
170 | } |
171 | ||
172 | static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) | |
173 | { | |
51b19ebe PB |
174 | VirtIOSCSICommon *vs = (VirtIOSCSICommon *)s; |
175 | VirtIOSCSIReq *req; | |
176 | ||
177 | req = virtqueue_pop(vq, sizeof(VirtIOSCSIReq) + vs->cdb_size); | |
178 | if (!req) { | |
326799c0 SH |
179 | return NULL; |
180 | } | |
51b19ebe | 181 | virtio_scsi_init_req(s, vq, req); |
326799c0 SH |
182 | return req; |
183 | } | |
184 | ||
5db1764c PB |
185 | static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
186 | { | |
187 | VirtIOSCSIReq *req = sreq->hba_private; | |
292c8e50 | 188 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); |
3a90c4ac | 189 | uint32_t n = virtio_get_queue_index(req->vq) - 2; |
5db1764c | 190 | |
292c8e50 | 191 | assert(n < vs->conf.num_queues); |
fcf104a7 | 192 | qemu_put_be32s(f, &n); |
ab281c17 | 193 | qemu_put_virtqueue_element(f, &req->elem); |
5db1764c PB |
194 | } |
195 | ||
196 | static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) | |
197 | { | |
198 | SCSIBus *bus = sreq->bus; | |
199 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
292c8e50 | 200 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
5db1764c | 201 | VirtIOSCSIReq *req; |
fcf104a7 | 202 | uint32_t n; |
5db1764c | 203 | |
fcf104a7 | 204 | qemu_get_be32s(f, &n); |
292c8e50 | 205 | assert(n < vs->conf.num_queues); |
ab281c17 | 206 | req = qemu_get_virtqueue_element(f, sizeof(VirtIOSCSIReq) + vs->cdb_size); |
51b19ebe | 207 | virtio_scsi_init_req(s, vs->cmd_vqs[n], req); |
4ada5331 | 208 | |
36b15c79 PB |
209 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size, |
210 | sizeof(VirtIOSCSICmdResp) + vs->sense_size) < 0) { | |
211 | error_report("invalid SCSI request migration data"); | |
212 | exit(1); | |
213 | } | |
5db1764c PB |
214 | |
215 | scsi_req_ref(sreq); | |
216 | req->sreq = sreq; | |
217 | if (req->sreq->cmd.mode != SCSI_XFER_NONE) { | |
3eff1f46 | 218 | assert(req->sreq->cmd.mode == req->mode); |
5db1764c PB |
219 | } |
220 | return req; | |
221 | } | |
222 | ||
49e7e31a FZ |
223 | typedef struct { |
224 | Notifier notifier; | |
225 | VirtIOSCSIReq *tmf_req; | |
226 | } VirtIOSCSICancelNotifier; | |
227 | ||
228 | static void virtio_scsi_cancel_notify(Notifier *notifier, void *data) | |
229 | { | |
230 | VirtIOSCSICancelNotifier *n = container_of(notifier, | |
231 | VirtIOSCSICancelNotifier, | |
232 | notifier); | |
233 | ||
234 | if (--n->tmf_req->remaining == 0) { | |
235 | virtio_scsi_complete_req(n->tmf_req); | |
236 | } | |
633dccb4 | 237 | g_free(n); |
49e7e31a FZ |
238 | } |
239 | ||
2a2d69f4 FZ |
240 | static inline void virtio_scsi_ctx_check(VirtIOSCSI *s, SCSIDevice *d) |
241 | { | |
242 | if (s->dataplane_started && d && blk_is_available(d->conf.blk)) { | |
243 | assert(blk_get_aio_context(d->conf.blk) == s->ctx); | |
244 | } | |
245 | } | |
246 | ||
49e7e31a FZ |
247 | /* Return 0 if the request is ready to be completed and return to guest; |
248 | * -EINPROGRESS if the request is submitted and will be completed later, in the | |
249 | * case of async cancellation. */ | |
250 | static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) | |
326799c0 | 251 | { |
3eff1f46 | 252 | SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf.lun); |
06114d72 | 253 | SCSIRequest *r, *next; |
0866aca1 | 254 | BusChild *kid; |
06114d72 | 255 | int target; |
49e7e31a | 256 | int ret = 0; |
06114d72 | 257 | |
2a2d69f4 | 258 | virtio_scsi_ctx_check(s, d); |
06114d72 | 259 | /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ |
3eff1f46 | 260 | req->resp.tmf.response = VIRTIO_SCSI_S_OK; |
06114d72 | 261 | |
8c085dbe | 262 | virtio_tswap32s(VIRTIO_DEVICE(s), &req->req.tmf.subtype); |
3eff1f46 | 263 | switch (req->req.tmf.subtype) { |
06114d72 PB |
264 | case VIRTIO_SCSI_T_TMF_ABORT_TASK: |
265 | case VIRTIO_SCSI_T_TMF_QUERY_TASK: | |
266 | if (!d) { | |
267 | goto fail; | |
268 | } | |
3eff1f46 | 269 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
270 | goto incorrect_lun; |
271 | } | |
272 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { | |
4dd7c82c | 273 | VirtIOSCSIReq *cmd_req = r->hba_private; |
3eff1f46 | 274 | if (cmd_req && cmd_req->req.cmd.tag == req->req.tmf.tag) { |
06114d72 PB |
275 | break; |
276 | } | |
277 | } | |
4dd7c82c PB |
278 | if (r) { |
279 | /* | |
280 | * Assert that the request has not been completed yet, we | |
281 | * check for it in the loop above. | |
282 | */ | |
283 | assert(r->hba_private); | |
3eff1f46 | 284 | if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) { |
06114d72 PB |
285 | /* "If the specified command is present in the task set, then |
286 | * return a service response set to FUNCTION SUCCEEDED". | |
287 | */ | |
3eff1f46 | 288 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
06114d72 | 289 | } else { |
49e7e31a FZ |
290 | VirtIOSCSICancelNotifier *notifier; |
291 | ||
292 | req->remaining = 1; | |
633dccb4 | 293 | notifier = g_new(VirtIOSCSICancelNotifier, 1); |
49e7e31a FZ |
294 | notifier->tmf_req = req; |
295 | notifier->notifier.notify = virtio_scsi_cancel_notify; | |
296 | scsi_req_cancel_async(r, ¬ifier->notifier); | |
297 | ret = -EINPROGRESS; | |
06114d72 PB |
298 | } |
299 | } | |
300 | break; | |
301 | ||
302 | case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: | |
303 | if (!d) { | |
304 | goto fail; | |
305 | } | |
3eff1f46 | 306 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
307 | goto incorrect_lun; |
308 | } | |
309 | s->resetting++; | |
310 | qdev_reset_all(&d->qdev); | |
311 | s->resetting--; | |
312 | break; | |
313 | ||
314 | case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: | |
315 | case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: | |
316 | case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: | |
317 | if (!d) { | |
318 | goto fail; | |
319 | } | |
3eff1f46 | 320 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
321 | goto incorrect_lun; |
322 | } | |
49e7e31a FZ |
323 | |
324 | /* Add 1 to "remaining" until virtio_scsi_do_tmf returns. | |
325 | * This way, if the bus starts calling back to the notifiers | |
326 | * even before we finish the loop, virtio_scsi_cancel_notify | |
327 | * will not complete the TMF too early. | |
328 | */ | |
329 | req->remaining = 1; | |
06114d72 PB |
330 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
331 | if (r->hba_private) { | |
3eff1f46 | 332 | if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) { |
06114d72 PB |
333 | /* "If there is any command present in the task set, then |
334 | * return a service response set to FUNCTION SUCCEEDED". | |
335 | */ | |
3eff1f46 | 336 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
06114d72 PB |
337 | break; |
338 | } else { | |
49e7e31a FZ |
339 | VirtIOSCSICancelNotifier *notifier; |
340 | ||
341 | req->remaining++; | |
633dccb4 | 342 | notifier = g_new(VirtIOSCSICancelNotifier, 1); |
49e7e31a FZ |
343 | notifier->notifier.notify = virtio_scsi_cancel_notify; |
344 | notifier->tmf_req = req; | |
345 | scsi_req_cancel_async(r, ¬ifier->notifier); | |
06114d72 PB |
346 | } |
347 | } | |
348 | } | |
49e7e31a FZ |
349 | if (--req->remaining > 0) { |
350 | ret = -EINPROGRESS; | |
351 | } | |
06114d72 PB |
352 | break; |
353 | ||
354 | case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: | |
3eff1f46 | 355 | target = req->req.tmf.lun[1]; |
06114d72 | 356 | s->resetting++; |
0866aca1 | 357 | QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
e1dc6815 | 358 | d = SCSI_DEVICE(kid->child); |
06114d72 PB |
359 | if (d->channel == 0 && d->id == target) { |
360 | qdev_reset_all(&d->qdev); | |
361 | } | |
362 | } | |
363 | s->resetting--; | |
364 | break; | |
365 | ||
366 | case VIRTIO_SCSI_T_TMF_CLEAR_ACA: | |
367 | default: | |
3eff1f46 | 368 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_REJECTED; |
06114d72 | 369 | break; |
326799c0 SH |
370 | } |
371 | ||
49e7e31a | 372 | return ret; |
06114d72 PB |
373 | |
374 | incorrect_lun: | |
3eff1f46 | 375 | req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN; |
49e7e31a | 376 | return ret; |
06114d72 PB |
377 | |
378 | fail: | |
3eff1f46 | 379 | req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET; |
49e7e31a | 380 | return ret; |
326799c0 SH |
381 | } |
382 | ||
a8f2e5c8 | 383 | static void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req) |
973abc7f | 384 | { |
dc56b7c4 | 385 | VirtIODevice *vdev = (VirtIODevice *)s; |
024d9adc | 386 | uint32_t type; |
49e7e31a | 387 | int r = 0; |
326799c0 | 388 | |
dc56b7c4 FZ |
389 | if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0, |
390 | &type, sizeof(type)) < sizeof(type)) { | |
661e32fb | 391 | virtio_scsi_bad_req(req); |
dc56b7c4 FZ |
392 | return; |
393 | } | |
36b15c79 | 394 | |
024d9adc BW |
395 | virtio_tswap32s(vdev, &type); |
396 | if (type == VIRTIO_SCSI_T_TMF) { | |
dc56b7c4 FZ |
397 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlTMFReq), |
398 | sizeof(VirtIOSCSICtrlTMFResp)) < 0) { | |
661e32fb GK |
399 | virtio_scsi_bad_req(req); |
400 | return; | |
dc56b7c4 | 401 | } else { |
49e7e31a | 402 | r = virtio_scsi_do_tmf(s, req); |
b0b4ea17 | 403 | } |
06114d72 | 404 | |
024d9adc BW |
405 | } else if (type == VIRTIO_SCSI_T_AN_QUERY || |
406 | type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { | |
dc56b7c4 FZ |
407 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlANReq), |
408 | sizeof(VirtIOSCSICtrlANResp)) < 0) { | |
661e32fb GK |
409 | virtio_scsi_bad_req(req); |
410 | return; | |
dc56b7c4 FZ |
411 | } else { |
412 | req->resp.an.event_actual = 0; | |
413 | req->resp.an.response = VIRTIO_SCSI_S_OK; | |
06114d72 | 414 | } |
dc56b7c4 | 415 | } |
49e7e31a FZ |
416 | if (r == 0) { |
417 | virtio_scsi_complete_req(req); | |
418 | } else { | |
419 | assert(r == -EINPROGRESS); | |
420 | } | |
dc56b7c4 FZ |
421 | } |
422 | ||
a8f2e5c8 | 423 | void virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq) |
dc56b7c4 | 424 | { |
dc56b7c4 FZ |
425 | VirtIOSCSIReq *req; |
426 | ||
427 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
428 | virtio_scsi_handle_ctrl_req(s, req); | |
326799c0 SH |
429 | } |
430 | } | |
431 | ||
a8f2e5c8 PB |
432 | static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
433 | { | |
434 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; | |
435 | ||
436 | if (s->ctx) { | |
437 | virtio_scsi_dataplane_start(s); | |
438 | if (!s->dataplane_fenced) { | |
439 | return; | |
440 | } | |
441 | } | |
442 | virtio_scsi_handle_ctrl_vq(s, vq); | |
443 | } | |
444 | ||
a3de269c PB |
445 | static void virtio_scsi_complete_cmd_req(VirtIOSCSIReq *req) |
446 | { | |
3eff1f46 PB |
447 | /* Sense data is not in req->resp and is copied separately |
448 | * in virtio_scsi_command_complete. | |
449 | */ | |
450 | req->resp_size = sizeof(VirtIOSCSICmdResp); | |
a3de269c PB |
451 | virtio_scsi_complete_req(req); |
452 | } | |
453 | ||
2ccdcd8d PB |
454 | static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
455 | size_t resid) | |
456 | { | |
457 | VirtIOSCSIReq *req = r->hba_private; | |
489c7901 | 458 | uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
474ee55a | 459 | uint32_t sense_len; |
8c085dbe | 460 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); |
2ccdcd8d | 461 | |
e9c0f0f5 EF |
462 | if (r->io_canceled) { |
463 | return; | |
464 | } | |
465 | ||
3eff1f46 PB |
466 | req->resp.cmd.response = VIRTIO_SCSI_S_OK; |
467 | req->resp.cmd.status = status; | |
468 | if (req->resp.cmd.status == GOOD) { | |
8c085dbe | 469 | req->resp.cmd.resid = virtio_tswap32(vdev, resid); |
2ccdcd8d | 470 | } else { |
3eff1f46 | 471 | req->resp.cmd.resid = 0; |
489c7901 | 472 | sense_len = scsi_req_get_sense(r, sense, sizeof(sense)); |
3eff1f46 PB |
473 | sense_len = MIN(sense_len, req->resp_iov.size - sizeof(req->resp.cmd)); |
474 | qemu_iovec_from_buf(&req->resp_iov, sizeof(req->resp.cmd), | |
b7890c40 | 475 | sense, sense_len); |
8c085dbe | 476 | req->resp.cmd.sense_len = virtio_tswap32(vdev, sense_len); |
2ccdcd8d | 477 | } |
a3de269c | 478 | virtio_scsi_complete_cmd_req(req); |
2ccdcd8d PB |
479 | } |
480 | ||
33cbb2c5 PB |
481 | static int virtio_scsi_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, |
482 | uint8_t *buf, void *hba_private) | |
483 | { | |
484 | VirtIOSCSIReq *req = hba_private; | |
485 | ||
486 | if (cmd->len == 0) { | |
03325525 | 487 | cmd->len = MIN(VIRTIO_SCSI_CDB_DEFAULT_SIZE, SCSI_CMD_BUF_SIZE); |
33cbb2c5 PB |
488 | memcpy(cmd->buf, buf, cmd->len); |
489 | } | |
490 | ||
491 | /* Extract the direction and mode directly from the request, for | |
492 | * host device passthrough. | |
493 | */ | |
494 | cmd->xfer = req->qsgl.size; | |
9df7bfdd | 495 | cmd->mode = req->mode; |
33cbb2c5 PB |
496 | return 0; |
497 | } | |
498 | ||
2ccdcd8d PB |
499 | static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) |
500 | { | |
501 | VirtIOSCSIReq *req = r->hba_private; | |
502 | ||
503 | return &req->qsgl; | |
504 | } | |
505 | ||
506 | static void virtio_scsi_request_cancelled(SCSIRequest *r) | |
507 | { | |
508 | VirtIOSCSIReq *req = r->hba_private; | |
509 | ||
510 | if (!req) { | |
511 | return; | |
512 | } | |
06114d72 | 513 | if (req->dev->resetting) { |
3eff1f46 | 514 | req->resp.cmd.response = VIRTIO_SCSI_S_RESET; |
06114d72 | 515 | } else { |
3eff1f46 | 516 | req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED; |
06114d72 | 517 | } |
a3de269c | 518 | virtio_scsi_complete_cmd_req(req); |
2ccdcd8d PB |
519 | } |
520 | ||
521 | static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) | |
326799c0 | 522 | { |
3eff1f46 | 523 | req->resp.cmd.response = VIRTIO_SCSI_S_FAILURE; |
a3de269c | 524 | virtio_scsi_complete_cmd_req(req); |
973abc7f SH |
525 | } |
526 | ||
661e32fb | 527 | static int virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req) |
bf359a44 FZ |
528 | { |
529 | VirtIOSCSICommon *vs = &s->parent_obj; | |
bf359a44 FZ |
530 | SCSIDevice *d; |
531 | int rc; | |
532 | ||
533 | rc = virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size, | |
534 | sizeof(VirtIOSCSICmdResp) + vs->sense_size); | |
535 | if (rc < 0) { | |
536 | if (rc == -ENOTSUP) { | |
537 | virtio_scsi_fail_cmd_req(req); | |
661e32fb | 538 | return -ENOTSUP; |
bf359a44 | 539 | } else { |
661e32fb GK |
540 | virtio_scsi_bad_req(req); |
541 | return -EINVAL; | |
bf359a44 | 542 | } |
bf359a44 FZ |
543 | } |
544 | ||
545 | d = virtio_scsi_device_find(s, req->req.cmd.lun); | |
546 | if (!d) { | |
547 | req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET; | |
548 | virtio_scsi_complete_cmd_req(req); | |
661e32fb | 549 | return -ENOENT; |
bf359a44 | 550 | } |
2a2d69f4 | 551 | virtio_scsi_ctx_check(s, d); |
bf359a44 FZ |
552 | req->sreq = scsi_req_new(d, req->req.cmd.tag, |
553 | virtio_scsi_get_lun(req->req.cmd.lun), | |
bb72463b | 554 | req->req.cmd.cdb, req); |
bf359a44 FZ |
555 | |
556 | if (req->sreq->cmd.mode != SCSI_XFER_NONE | |
557 | && (req->sreq->cmd.mode != req->mode || | |
558 | req->sreq->cmd.xfer > req->qsgl.size)) { | |
559 | req->resp.cmd.response = VIRTIO_SCSI_S_OVERRUN; | |
560 | virtio_scsi_complete_cmd_req(req); | |
661e32fb | 561 | return -ENOBUFS; |
bf359a44 | 562 | } |
5170f40b | 563 | scsi_req_ref(req->sreq); |
4be74634 | 564 | blk_io_plug(d->conf.blk); |
661e32fb | 565 | return 0; |
359eea71 | 566 | } |
bf359a44 | 567 | |
a8f2e5c8 | 568 | static void virtio_scsi_handle_cmd_req_submit(VirtIOSCSI *s, VirtIOSCSIReq *req) |
359eea71 | 569 | { |
35e4e96c PB |
570 | SCSIRequest *sreq = req->sreq; |
571 | if (scsi_req_enqueue(sreq)) { | |
572 | scsi_req_continue(sreq); | |
bf359a44 | 573 | } |
4be74634 | 574 | blk_io_unplug(sreq->dev->conf.blk); |
35e4e96c | 575 | scsi_req_unref(sreq); |
bf359a44 FZ |
576 | } |
577 | ||
a8f2e5c8 | 578 | void virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq) |
973abc7f | 579 | { |
1880ad4f | 580 | VirtIOSCSIReq *req, *next; |
661e32fb GK |
581 | int ret; |
582 | ||
1880ad4f | 583 | QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs); |
326799c0 SH |
584 | |
585 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
661e32fb GK |
586 | ret = virtio_scsi_handle_cmd_req_prepare(s, req); |
587 | if (!ret) { | |
1880ad4f | 588 | QTAILQ_INSERT_TAIL(&reqs, req, next); |
661e32fb GK |
589 | } else if (ret == -EINVAL) { |
590 | /* The device is broken and shouldn't process any request */ | |
591 | while (!QTAILQ_EMPTY(&reqs)) { | |
592 | req = QTAILQ_FIRST(&reqs); | |
593 | QTAILQ_REMOVE(&reqs, req, next); | |
594 | blk_io_unplug(req->sreq->dev->conf.blk); | |
595 | scsi_req_unref(req->sreq); | |
596 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
597 | virtio_scsi_free_req(req); | |
598 | } | |
359eea71 | 599 | } |
326799c0 | 600 | } |
1880ad4f FZ |
601 | |
602 | QTAILQ_FOREACH_SAFE(req, &reqs, next, next) { | |
603 | virtio_scsi_handle_cmd_req_submit(s, req); | |
604 | } | |
973abc7f SH |
605 | } |
606 | ||
a8f2e5c8 PB |
607 | static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) |
608 | { | |
609 | /* use non-QOM casts in the data path */ | |
610 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; | |
611 | ||
612 | if (s->ctx) { | |
613 | virtio_scsi_dataplane_start(s); | |
614 | if (!s->dataplane_fenced) { | |
615 | return; | |
616 | } | |
617 | } | |
618 | virtio_scsi_handle_cmd_vq(s, vq); | |
619 | } | |
620 | ||
973abc7f SH |
621 | static void virtio_scsi_get_config(VirtIODevice *vdev, |
622 | uint8_t *config) | |
623 | { | |
624 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 625 | VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
973abc7f | 626 | |
8c085dbe RR |
627 | virtio_stl_p(vdev, &scsiconf->num_queues, s->conf.num_queues); |
628 | virtio_stl_p(vdev, &scsiconf->seg_max, 128 - 2); | |
629 | virtio_stl_p(vdev, &scsiconf->max_sectors, s->conf.max_sectors); | |
630 | virtio_stl_p(vdev, &scsiconf->cmd_per_lun, s->conf.cmd_per_lun); | |
631 | virtio_stl_p(vdev, &scsiconf->event_info_size, sizeof(VirtIOSCSIEvent)); | |
632 | virtio_stl_p(vdev, &scsiconf->sense_size, s->sense_size); | |
633 | virtio_stl_p(vdev, &scsiconf->cdb_size, s->cdb_size); | |
634 | virtio_stw_p(vdev, &scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); | |
635 | virtio_stw_p(vdev, &scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); | |
636 | virtio_stl_p(vdev, &scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); | |
973abc7f SH |
637 | } |
638 | ||
639 | static void virtio_scsi_set_config(VirtIODevice *vdev, | |
640 | const uint8_t *config) | |
641 | { | |
642 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 643 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
973abc7f | 644 | |
8c085dbe RR |
645 | if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) >= 65536 || |
646 | (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) >= 256) { | |
ad14a46a GK |
647 | virtio_error(vdev, |
648 | "bad data written to virtio-scsi configuration space"); | |
649 | return; | |
973abc7f SH |
650 | } |
651 | ||
8c085dbe RR |
652 | vs->sense_size = virtio_ldl_p(vdev, &scsiconf->sense_size); |
653 | vs->cdb_size = virtio_ldl_p(vdev, &scsiconf->cdb_size); | |
973abc7f SH |
654 | } |
655 | ||
019a3edb | 656 | static uint64_t virtio_scsi_get_features(VirtIODevice *vdev, |
9d5b731d JW |
657 | uint64_t requested_features, |
658 | Error **errp) | |
973abc7f | 659 | { |
da2f84d1 SZ |
660 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
661 | ||
662 | /* Firstly sync all virtio-scsi possible supported features */ | |
663 | requested_features |= s->host_features; | |
973abc7f SH |
664 | return requested_features; |
665 | } | |
666 | ||
667 | static void virtio_scsi_reset(VirtIODevice *vdev) | |
668 | { | |
292c8e50 PB |
669 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
670 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); | |
973abc7f | 671 | |
63c7e542 FZ |
672 | if (s->ctx) { |
673 | virtio_scsi_dataplane_stop(s); | |
674 | } | |
47a150a4 PB |
675 | s->resetting++; |
676 | qbus_reset_all(&s->bus.qbus); | |
677 | s->resetting--; | |
678 | ||
03325525 MT |
679 | vs->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE; |
680 | vs->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE; | |
2baa1beb | 681 | s->events_dropped = false; |
973abc7f SH |
682 | } |
683 | ||
20e6dca1 FZ |
684 | void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
685 | uint32_t event, uint32_t reason) | |
b6866fee | 686 | { |
292c8e50 | 687 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
91e7fcca | 688 | VirtIOSCSIReq *req; |
b6866fee | 689 | VirtIOSCSIEvent *evt; |
0ac8e139 | 690 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
b6866fee | 691 | |
0ac8e139 | 692 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
cd41a671 PB |
693 | return; |
694 | } | |
695 | ||
63c7e542 FZ |
696 | if (s->dataplane_started) { |
697 | assert(s->ctx); | |
698 | aio_context_acquire(s->ctx); | |
699 | } | |
700 | ||
e24a47c5 | 701 | req = virtio_scsi_pop_req(s, vs->event_vq); |
64f64855 PB |
702 | if (!req) { |
703 | s->events_dropped = true; | |
63c7e542 | 704 | goto out; |
64f64855 | 705 | } |
b6866fee | 706 | |
64f64855 PB |
707 | if (s->events_dropped) { |
708 | event |= VIRTIO_SCSI_T_EVENTS_MISSED; | |
709 | s->events_dropped = false; | |
710 | } | |
711 | ||
dfecbb95 | 712 | if (virtio_scsi_parse_req(req, 0, sizeof(VirtIOSCSIEvent))) { |
661e32fb GK |
713 | virtio_scsi_bad_req(req); |
714 | goto out; | |
64f64855 PB |
715 | } |
716 | ||
3eff1f46 | 717 | evt = &req->resp.event; |
64f64855 | 718 | memset(evt, 0, sizeof(VirtIOSCSIEvent)); |
424baff5 CLG |
719 | evt->event = virtio_tswap32(vdev, event); |
720 | evt->reason = virtio_tswap32(vdev, reason); | |
64f64855 | 721 | if (!dev) { |
49fb65c7 | 722 | assert(event == VIRTIO_SCSI_T_EVENTS_MISSED); |
64f64855 | 723 | } else { |
b6866fee CM |
724 | evt->lun[0] = 1; |
725 | evt->lun[1] = dev->id; | |
726 | ||
727 | /* Linux wants us to keep the same encoding we use for REPORT LUNS. */ | |
728 | if (dev->lun >= 256) { | |
729 | evt->lun[2] = (dev->lun >> 8) | 0x40; | |
730 | } | |
731 | evt->lun[3] = dev->lun & 0xFF; | |
64f64855 PB |
732 | } |
733 | virtio_scsi_complete_req(req); | |
63c7e542 FZ |
734 | out: |
735 | if (s->dataplane_started) { | |
736 | aio_context_release(s->ctx); | |
737 | } | |
64f64855 PB |
738 | } |
739 | ||
a8f2e5c8 PB |
740 | void virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq) |
741 | { | |
742 | if (s->events_dropped) { | |
743 | virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); | |
744 | } | |
745 | } | |
746 | ||
64f64855 PB |
747 | static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) |
748 | { | |
0ac8e139 | 749 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
64f64855 | 750 | |
a8f2e5c8 | 751 | if (s->ctx) { |
63c7e542 | 752 | virtio_scsi_dataplane_start(s); |
a8f2e5c8 PB |
753 | if (!s->dataplane_fenced) { |
754 | return; | |
755 | } | |
b6866fee | 756 | } |
a8f2e5c8 | 757 | virtio_scsi_handle_event_vq(s, vq); |
b6866fee CM |
758 | } |
759 | ||
feda01e4 PB |
760 | static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
761 | { | |
762 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
0ac8e139 | 763 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
feda01e4 | 764 | |
95129d6f | 765 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_CHANGE) && |
feda01e4 PB |
766 | dev->type != TYPE_ROM) { |
767 | virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, | |
768 | sense.asc | (sense.ascq << 8)); | |
769 | } | |
770 | } | |
771 | ||
02206e52 IM |
772 | static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev, |
773 | Error **errp) | |
b6866fee | 774 | { |
02206e52 | 775 | VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev); |
3e2b2a9c FZ |
776 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
777 | SCSIDevice *sd = SCSI_DEVICE(dev); | |
778 | ||
43c696a2 | 779 | if (s->ctx && !s->dataplane_fenced) { |
3e2b2a9c FZ |
780 | if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) { |
781 | return; | |
782 | } | |
05430559 FZ |
783 | aio_context_acquire(s->ctx); |
784 | blk_set_aio_context(sd->conf.blk, s->ctx); | |
785 | aio_context_release(s->ctx); | |
5b9e0e46 | 786 | |
3e2b2a9c | 787 | } |
b6866fee | 788 | |
95129d6f | 789 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) { |
3e2b2a9c | 790 | virtio_scsi_push_event(s, sd, |
02206e52 | 791 | VIRTIO_SCSI_T_TRANSPORT_RESET, |
b6866fee CM |
792 | VIRTIO_SCSI_EVT_RESET_RESCAN); |
793 | } | |
794 | } | |
795 | ||
02206e52 IM |
796 | static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, |
797 | Error **errp) | |
b6866fee | 798 | { |
02206e52 | 799 | VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev); |
3e2b2a9c FZ |
800 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
801 | SCSIDevice *sd = SCSI_DEVICE(dev); | |
b6866fee | 802 | |
95129d6f | 803 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) { |
3e2b2a9c | 804 | virtio_scsi_push_event(s, sd, |
02206e52 | 805 | VIRTIO_SCSI_T_TRANSPORT_RESET, |
b6866fee CM |
806 | VIRTIO_SCSI_EVT_RESET_REMOVED); |
807 | } | |
3e2b2a9c | 808 | |
02206e52 | 809 | qdev_simple_device_unplug_cb(hotplug_dev, dev, errp); |
b6866fee CM |
810 | } |
811 | ||
2ccdcd8d PB |
812 | static struct SCSIBusInfo virtio_scsi_scsi_info = { |
813 | .tcq = true, | |
814 | .max_channel = VIRTIO_SCSI_MAX_CHANNEL, | |
815 | .max_target = VIRTIO_SCSI_MAX_TARGET, | |
816 | .max_lun = VIRTIO_SCSI_MAX_LUN, | |
817 | ||
818 | .complete = virtio_scsi_command_complete, | |
819 | .cancel = virtio_scsi_request_cancelled, | |
feda01e4 | 820 | .change = virtio_scsi_change, |
33cbb2c5 | 821 | .parse_cdb = virtio_scsi_parse_cdb, |
2ccdcd8d | 822 | .get_sg_list = virtio_scsi_get_sg_list, |
5db1764c PB |
823 | .save_request = virtio_scsi_save_request, |
824 | .load_request = virtio_scsi_load_request, | |
2ccdcd8d PB |
825 | }; |
826 | ||
91d670fb | 827 | void virtio_scsi_common_realize(DeviceState *dev, Error **errp, |
209b27bb FZ |
828 | VirtIOHandleOutput ctrl, |
829 | VirtIOHandleOutput evt, | |
830 | VirtIOHandleOutput cmd) | |
973abc7f | 831 | { |
71a6520b AF |
832 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
833 | VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev); | |
d2ad7dd4 | 834 | int i; |
973abc7f | 835 | |
7598f0f3 | 836 | virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI, |
763684be | 837 | sizeof(VirtIOSCSIConfig)); |
3ab1dfdd | 838 | |
0ba1f531 | 839 | if (s->conf.num_queues == 0 || |
87b3bd1c | 840 | s->conf.num_queues > VIRTIO_QUEUE_MAX - 2) { |
0ba1f531 | 841 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
c9f65528 | 842 | "must be a positive integer less than %d.", |
87b3bd1c | 843 | s->conf.num_queues, VIRTIO_QUEUE_MAX - 2); |
93bd49af | 844 | virtio_cleanup(vdev); |
c9f65528 FZ |
845 | return; |
846 | } | |
3c55fe2a | 847 | s->cmd_vqs = g_new0(VirtQueue *, s->conf.num_queues); |
03325525 MT |
848 | s->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE; |
849 | s->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE; | |
3ab1dfdd | 850 | |
1c627137 FZ |
851 | s->ctrl_vq = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, ctrl); |
852 | s->event_vq = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, evt); | |
394e2e4c | 853 | for (i = 0; i < s->conf.num_queues; i++) { |
1c627137 | 854 | s->cmd_vqs[i] = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, cmd); |
d2ad7dd4 | 855 | } |
9786b592 FZ |
856 | |
857 | if (s->conf.iothread) { | |
858 | virtio_scsi_set_iothread(VIRTIO_SCSI(s), s->conf.iothread); | |
859 | } | |
292c8e50 PB |
860 | } |
861 | ||
71a6520b | 862 | static void virtio_scsi_device_realize(DeviceState *dev, Error **errp) |
292c8e50 | 863 | { |
71a6520b | 864 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
7598f0f3 | 865 | VirtIOSCSI *s = VIRTIO_SCSI(dev); |
caad4eb3 | 866 | Error *err = NULL; |
292c8e50 | 867 | |
91d670fb ML |
868 | virtio_scsi_common_realize(dev, &err, virtio_scsi_handle_ctrl, |
869 | virtio_scsi_handle_event, | |
870 | virtio_scsi_handle_cmd); | |
71a6520b AF |
871 | if (err != NULL) { |
872 | error_propagate(errp, err); | |
873 | return; | |
292c8e50 PB |
874 | } |
875 | ||
7598f0f3 | 876 | scsi_bus_new(&s->bus, sizeof(s->bus), dev, |
b1187b51 | 877 | &virtio_scsi_scsi_info, vdev->bus_name); |
02206e52 IM |
878 | /* override default SCSI bus hotplug-handler, with virtio-scsi's one */ |
879 | qbus_set_hotplug_handler(BUS(&s->bus), dev, &error_abort); | |
6f32a6b4 | 880 | |
7598f0f3 | 881 | if (!dev->hotplugged) { |
caad4eb3 AF |
882 | scsi_bus_legacy_handle_cmdline(&s->bus, &err); |
883 | if (err != NULL) { | |
71a6520b AF |
884 | error_propagate(errp, err); |
885 | return; | |
caad4eb3 | 886 | } |
2ccdcd8d | 887 | } |
3ab1dfdd FK |
888 | } |
889 | ||
19d339f1 FZ |
890 | static void virtio_scsi_instance_init(Object *obj) |
891 | { | |
892 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(obj); | |
893 | ||
894 | object_property_add_link(obj, "iothread", TYPE_IOTHREAD, | |
895 | (Object **)&vs->conf.iothread, | |
896 | qdev_prop_allow_set_link_before_realize, | |
897 | OBJ_PROP_LINK_UNREF_ON_RELEASE, &error_abort); | |
898 | } | |
899 | ||
306ec6c3 | 900 | void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp) |
292c8e50 | 901 | { |
306ec6c3 AF |
902 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
903 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev); | |
292c8e50 PB |
904 | |
905 | g_free(vs->cmd_vqs); | |
6a1a8cc7 | 906 | virtio_cleanup(vdev); |
292c8e50 PB |
907 | } |
908 | ||
306ec6c3 | 909 | static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp) |
3ab1dfdd | 910 | { |
306ec6c3 | 911 | virtio_scsi_common_unrealize(dev, errp); |
3ab1dfdd FK |
912 | } |
913 | ||
914 | static Property virtio_scsi_properties[] = { | |
0c63237a SZ |
915 | DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues, 1), |
916 | DEFINE_PROP_UINT32("max_sectors", VirtIOSCSI, parent_obj.conf.max_sectors, | |
917 | 0xFFFF), | |
918 | DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSI, parent_obj.conf.cmd_per_lun, | |
919 | 128), | |
0c63237a SZ |
920 | DEFINE_PROP_BIT("hotplug", VirtIOSCSI, host_features, |
921 | VIRTIO_SCSI_F_HOTPLUG, true), | |
922 | DEFINE_PROP_BIT("param_change", VirtIOSCSI, host_features, | |
923 | VIRTIO_SCSI_F_CHANGE, true), | |
3ab1dfdd FK |
924 | DEFINE_PROP_END_OF_LIST(), |
925 | }; | |
926 | ||
f20476b9 HP |
927 | static const VMStateDescription vmstate_virtio_scsi = { |
928 | .name = "virtio-scsi", | |
929 | .minimum_version_id = 1, | |
930 | .version_id = 1, | |
931 | .fields = (VMStateField[]) { | |
932 | VMSTATE_VIRTIO_DEVICE, | |
933 | VMSTATE_END_OF_LIST() | |
934 | }, | |
935 | }; | |
5a289a28 | 936 | |
292c8e50 PB |
937 | static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
938 | { | |
939 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
125ee0ed | 940 | DeviceClass *dc = DEVICE_CLASS(klass); |
292c8e50 PB |
941 | |
942 | vdc->get_config = virtio_scsi_get_config; | |
125ee0ed | 943 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
292c8e50 PB |
944 | } |
945 | ||
3ab1dfdd FK |
946 | static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
947 | { | |
948 | DeviceClass *dc = DEVICE_CLASS(klass); | |
949 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
02206e52 | 950 | HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); |
71a6520b | 951 | |
3ab1dfdd | 952 | dc->props = virtio_scsi_properties; |
5a289a28 | 953 | dc->vmsd = &vmstate_virtio_scsi; |
125ee0ed | 954 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
71a6520b | 955 | vdc->realize = virtio_scsi_device_realize; |
306ec6c3 | 956 | vdc->unrealize = virtio_scsi_device_unrealize; |
3ab1dfdd FK |
957 | vdc->set_config = virtio_scsi_set_config; |
958 | vdc->get_features = virtio_scsi_get_features; | |
959 | vdc->reset = virtio_scsi_reset; | |
02206e52 IM |
960 | hc->plug = virtio_scsi_hotplug; |
961 | hc->unplug = virtio_scsi_hotunplug; | |
3ab1dfdd FK |
962 | } |
963 | ||
292c8e50 PB |
964 | static const TypeInfo virtio_scsi_common_info = { |
965 | .name = TYPE_VIRTIO_SCSI_COMMON, | |
966 | .parent = TYPE_VIRTIO_DEVICE, | |
967 | .instance_size = sizeof(VirtIOSCSICommon), | |
a27292b5 | 968 | .abstract = true, |
292c8e50 PB |
969 | .class_init = virtio_scsi_common_class_init, |
970 | }; | |
971 | ||
3ab1dfdd FK |
972 | static const TypeInfo virtio_scsi_info = { |
973 | .name = TYPE_VIRTIO_SCSI, | |
292c8e50 | 974 | .parent = TYPE_VIRTIO_SCSI_COMMON, |
3ab1dfdd | 975 | .instance_size = sizeof(VirtIOSCSI), |
19d339f1 | 976 | .instance_init = virtio_scsi_instance_init, |
3ab1dfdd | 977 | .class_init = virtio_scsi_class_init, |
02206e52 IM |
978 | .interfaces = (InterfaceInfo[]) { |
979 | { TYPE_HOTPLUG_HANDLER }, | |
980 | { } | |
981 | } | |
3ab1dfdd FK |
982 | }; |
983 | ||
984 | static void virtio_register_types(void) | |
985 | { | |
292c8e50 | 986 | type_register_static(&virtio_scsi_common_info); |
3ab1dfdd FK |
987 | type_register_static(&virtio_scsi_info); |
988 | } | |
989 | ||
990 | type_init(virtio_register_types) |