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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" |
ca77ee28 | 20 | #include "migration/qemu-file-types.h" |
b4a42f81 | 21 | #include "qemu/error-report.h" |
36b15c79 | 22 | #include "qemu/iov.h" |
0b8fa32f | 23 | #include "qemu/module.h" |
4be74634 | 24 | #include "sysemu/block-backend.h" |
a27bd6c7 | 25 | #include "hw/qdev-properties.h" |
a9c94277 | 26 | #include "hw/scsi/scsi.h" |
08e2c9f1 | 27 | #include "scsi/constants.h" |
a9c94277 | 28 | #include "hw/virtio/virtio-bus.h" |
8c085dbe | 29 | #include "hw/virtio/virtio-access.h" |
973abc7f | 30 | |
2ccdcd8d PB |
31 | static inline int virtio_scsi_get_lun(uint8_t *lun) |
32 | { | |
33 | return ((lun[2] << 8) | lun[3]) & 0x3FFF; | |
34 | } | |
35 | ||
36 | static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) | |
37 | { | |
38 | if (lun[0] != 1) { | |
39 | return NULL; | |
40 | } | |
41 | if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { | |
42 | return NULL; | |
43 | } | |
44 | return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); | |
45 | } | |
46 | ||
51b19ebe | 47 | void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req) |
36b15c79 | 48 | { |
025bdeab | 49 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
e24a47c5 PB |
50 | const size_t zero_skip = |
51 | offsetof(VirtIOSCSIReq, resp_iov) + sizeof(req->resp_iov); | |
36b15c79 PB |
52 | |
53 | req->vq = vq; | |
54 | req->dev = s; | |
025bdeab | 55 | qemu_sglist_init(&req->qsgl, DEVICE(s), 8, vdev->dma_as); |
3eff1f46 | 56 | qemu_iovec_init(&req->resp_iov, 1); |
faf1e1fb | 57 | memset((uint8_t *)req + zero_skip, 0, sizeof(*req) - zero_skip); |
36b15c79 PB |
58 | } |
59 | ||
aa8e8f83 | 60 | void virtio_scsi_free_req(VirtIOSCSIReq *req) |
36b15c79 | 61 | { |
3eff1f46 | 62 | qemu_iovec_destroy(&req->resp_iov); |
36b15c79 | 63 | qemu_sglist_destroy(&req->qsgl); |
633dccb4 | 64 | g_free(req); |
36b15c79 PB |
65 | } |
66 | ||
326799c0 SH |
67 | static void virtio_scsi_complete_req(VirtIOSCSIReq *req) |
68 | { | |
69 | VirtIOSCSI *s = req->dev; | |
70 | VirtQueue *vq = req->vq; | |
0ac8e139 | 71 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
3eff1f46 PB |
72 | |
73 | qemu_iovec_from_buf(&req->resp_iov, 0, &req->resp, req->resp_size); | |
e24a47c5 | 74 | virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size); |
43c696a2 | 75 | if (s->dataplane_started && !s->dataplane_fenced) { |
83d768b5 | 76 | virtio_notify_irqfd(vdev, vq); |
63c7e542 | 77 | } else { |
63c7e542 FZ |
78 | virtio_notify(vdev, vq); |
79 | } | |
80 | ||
326799c0 SH |
81 | if (req->sreq) { |
82 | req->sreq->hba_private = NULL; | |
83 | scsi_req_unref(req->sreq); | |
84 | } | |
36b15c79 | 85 | virtio_scsi_free_req(req); |
326799c0 SH |
86 | } |
87 | ||
661e32fb | 88 | static void virtio_scsi_bad_req(VirtIOSCSIReq *req) |
326799c0 | 89 | { |
661e32fb GK |
90 | virtio_error(VIRTIO_DEVICE(req->dev), "wrong size for virtio-scsi headers"); |
91 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
92 | virtio_scsi_free_req(req); | |
326799c0 SH |
93 | } |
94 | ||
57fbae6e PB |
95 | static size_t qemu_sgl_concat(VirtIOSCSIReq *req, struct iovec *iov, |
96 | hwaddr *addr, int num, size_t skip) | |
326799c0 | 97 | { |
f487b677 | 98 | QEMUSGList *qsgl = &req->qsgl; |
57fbae6e PB |
99 | size_t copied = 0; |
100 | ||
101 | while (num) { | |
102 | if (skip >= iov->iov_len) { | |
103 | skip -= iov->iov_len; | |
104 | } else { | |
105 | qemu_sglist_add(qsgl, *addr + skip, iov->iov_len - skip); | |
106 | copied += iov->iov_len - skip; | |
107 | skip = 0; | |
108 | } | |
109 | iov++; | |
110 | addr++; | |
111 | num--; | |
326799c0 | 112 | } |
57fbae6e PB |
113 | |
114 | assert(skip == 0); | |
115 | return copied; | |
326799c0 SH |
116 | } |
117 | ||
36b15c79 PB |
118 | static int virtio_scsi_parse_req(VirtIOSCSIReq *req, |
119 | unsigned req_size, unsigned resp_size) | |
326799c0 | 120 | { |
55783a55 | 121 | VirtIODevice *vdev = (VirtIODevice *) req->dev; |
3eff1f46 | 122 | size_t in_size, out_size; |
36b15c79 | 123 | |
3eff1f46 PB |
124 | if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0, |
125 | &req->req, req_size) < req_size) { | |
36b15c79 PB |
126 | return -EINVAL; |
127 | } | |
36b15c79 | 128 | |
3eff1f46 PB |
129 | if (qemu_iovec_concat_iov(&req->resp_iov, |
130 | req->elem.in_sg, req->elem.in_num, 0, | |
131 | resp_size) < resp_size) { | |
36b15c79 PB |
132 | return -EINVAL; |
133 | } | |
55783a55 | 134 | |
489c7901 | 135 | req->resp_size = resp_size; |
326799c0 | 136 | |
55783a55 PB |
137 | /* Old BIOSes left some padding by mistake after the req_size/resp_size. |
138 | * As a workaround, always consider the first buffer as the virtio-scsi | |
139 | * request/response, making the payload start at the second element | |
140 | * of the iovec. | |
141 | * | |
142 | * The actual length of the response header, stored in req->resp_size, | |
143 | * does not change. | |
144 | * | |
145 | * TODO: always disable this workaround for virtio 1.0 devices. | |
146 | */ | |
95129d6f | 147 | if (!virtio_vdev_has_feature(vdev, VIRTIO_F_ANY_LAYOUT)) { |
2034e324 FZ |
148 | if (req->elem.out_num) { |
149 | req_size = req->elem.out_sg[0].iov_len; | |
150 | } | |
151 | if (req->elem.in_num) { | |
152 | resp_size = req->elem.in_sg[0].iov_len; | |
153 | } | |
55783a55 PB |
154 | } |
155 | ||
3eff1f46 PB |
156 | out_size = qemu_sgl_concat(req, req->elem.out_sg, |
157 | &req->elem.out_addr[0], req->elem.out_num, | |
158 | req_size); | |
159 | in_size = qemu_sgl_concat(req, req->elem.in_sg, | |
160 | &req->elem.in_addr[0], req->elem.in_num, | |
161 | resp_size); | |
162 | ||
163 | if (out_size && in_size) { | |
164 | return -ENOTSUP; | |
165 | } | |
166 | ||
167 | if (out_size) { | |
168 | req->mode = SCSI_XFER_TO_DEV; | |
169 | } else if (in_size) { | |
170 | req->mode = SCSI_XFER_FROM_DEV; | |
326799c0 | 171 | } |
36b15c79 PB |
172 | |
173 | return 0; | |
326799c0 SH |
174 | } |
175 | ||
176 | static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) | |
177 | { | |
51b19ebe PB |
178 | VirtIOSCSICommon *vs = (VirtIOSCSICommon *)s; |
179 | VirtIOSCSIReq *req; | |
180 | ||
181 | req = virtqueue_pop(vq, sizeof(VirtIOSCSIReq) + vs->cdb_size); | |
182 | if (!req) { | |
326799c0 SH |
183 | return NULL; |
184 | } | |
51b19ebe | 185 | virtio_scsi_init_req(s, vq, req); |
326799c0 SH |
186 | return req; |
187 | } | |
188 | ||
5db1764c PB |
189 | static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
190 | { | |
191 | VirtIOSCSIReq *req = sreq->hba_private; | |
292c8e50 | 192 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); |
86044b24 | 193 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); |
3a90c4ac | 194 | uint32_t n = virtio_get_queue_index(req->vq) - 2; |
5db1764c | 195 | |
292c8e50 | 196 | assert(n < vs->conf.num_queues); |
fcf104a7 | 197 | qemu_put_be32s(f, &n); |
86044b24 | 198 | qemu_put_virtqueue_element(vdev, f, &req->elem); |
5db1764c PB |
199 | } |
200 | ||
201 | static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) | |
202 | { | |
203 | SCSIBus *bus = sreq->bus; | |
204 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
292c8e50 | 205 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
8607f5c3 | 206 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
5db1764c | 207 | VirtIOSCSIReq *req; |
fcf104a7 | 208 | uint32_t n; |
5db1764c | 209 | |
fcf104a7 | 210 | qemu_get_be32s(f, &n); |
292c8e50 | 211 | assert(n < vs->conf.num_queues); |
8607f5c3 JW |
212 | req = qemu_get_virtqueue_element(vdev, f, |
213 | sizeof(VirtIOSCSIReq) + vs->cdb_size); | |
51b19ebe | 214 | virtio_scsi_init_req(s, vs->cmd_vqs[n], req); |
4ada5331 | 215 | |
36b15c79 PB |
216 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size, |
217 | sizeof(VirtIOSCSICmdResp) + vs->sense_size) < 0) { | |
218 | error_report("invalid SCSI request migration data"); | |
219 | exit(1); | |
220 | } | |
5db1764c PB |
221 | |
222 | scsi_req_ref(sreq); | |
223 | req->sreq = sreq; | |
224 | if (req->sreq->cmd.mode != SCSI_XFER_NONE) { | |
3eff1f46 | 225 | assert(req->sreq->cmd.mode == req->mode); |
5db1764c PB |
226 | } |
227 | return req; | |
228 | } | |
229 | ||
49e7e31a FZ |
230 | typedef struct { |
231 | Notifier notifier; | |
232 | VirtIOSCSIReq *tmf_req; | |
233 | } VirtIOSCSICancelNotifier; | |
234 | ||
235 | static void virtio_scsi_cancel_notify(Notifier *notifier, void *data) | |
236 | { | |
237 | VirtIOSCSICancelNotifier *n = container_of(notifier, | |
238 | VirtIOSCSICancelNotifier, | |
239 | notifier); | |
240 | ||
241 | if (--n->tmf_req->remaining == 0) { | |
242 | virtio_scsi_complete_req(n->tmf_req); | |
243 | } | |
633dccb4 | 244 | g_free(n); |
49e7e31a FZ |
245 | } |
246 | ||
2a2d69f4 FZ |
247 | static inline void virtio_scsi_ctx_check(VirtIOSCSI *s, SCSIDevice *d) |
248 | { | |
249 | if (s->dataplane_started && d && blk_is_available(d->conf.blk)) { | |
250 | assert(blk_get_aio_context(d->conf.blk) == s->ctx); | |
251 | } | |
252 | } | |
253 | ||
49e7e31a FZ |
254 | /* Return 0 if the request is ready to be completed and return to guest; |
255 | * -EINPROGRESS if the request is submitted and will be completed later, in the | |
256 | * case of async cancellation. */ | |
257 | static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) | |
326799c0 | 258 | { |
3eff1f46 | 259 | SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf.lun); |
06114d72 | 260 | SCSIRequest *r, *next; |
0866aca1 | 261 | BusChild *kid; |
06114d72 | 262 | int target; |
49e7e31a | 263 | int ret = 0; |
06114d72 | 264 | |
2a2d69f4 | 265 | virtio_scsi_ctx_check(s, d); |
06114d72 | 266 | /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ |
3eff1f46 | 267 | req->resp.tmf.response = VIRTIO_SCSI_S_OK; |
06114d72 | 268 | |
d804232d GK |
269 | /* |
270 | * req->req.tmf has the QEMU_PACKED attribute. Don't use virtio_tswap32s() | |
271 | * to avoid compiler errors. | |
272 | */ | |
273 | req->req.tmf.subtype = | |
274 | virtio_tswap32(VIRTIO_DEVICE(s), req->req.tmf.subtype); | |
275 | ||
3eff1f46 | 276 | switch (req->req.tmf.subtype) { |
06114d72 PB |
277 | case VIRTIO_SCSI_T_TMF_ABORT_TASK: |
278 | case VIRTIO_SCSI_T_TMF_QUERY_TASK: | |
279 | if (!d) { | |
280 | goto fail; | |
281 | } | |
3eff1f46 | 282 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
283 | goto incorrect_lun; |
284 | } | |
285 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { | |
4dd7c82c | 286 | VirtIOSCSIReq *cmd_req = r->hba_private; |
3eff1f46 | 287 | if (cmd_req && cmd_req->req.cmd.tag == req->req.tmf.tag) { |
06114d72 PB |
288 | break; |
289 | } | |
290 | } | |
4dd7c82c PB |
291 | if (r) { |
292 | /* | |
293 | * Assert that the request has not been completed yet, we | |
294 | * check for it in the loop above. | |
295 | */ | |
296 | assert(r->hba_private); | |
3eff1f46 | 297 | if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) { |
06114d72 PB |
298 | /* "If the specified command is present in the task set, then |
299 | * return a service response set to FUNCTION SUCCEEDED". | |
300 | */ | |
3eff1f46 | 301 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
06114d72 | 302 | } else { |
49e7e31a FZ |
303 | VirtIOSCSICancelNotifier *notifier; |
304 | ||
305 | req->remaining = 1; | |
633dccb4 | 306 | notifier = g_new(VirtIOSCSICancelNotifier, 1); |
49e7e31a FZ |
307 | notifier->tmf_req = req; |
308 | notifier->notifier.notify = virtio_scsi_cancel_notify; | |
309 | scsi_req_cancel_async(r, ¬ifier->notifier); | |
310 | ret = -EINPROGRESS; | |
06114d72 PB |
311 | } |
312 | } | |
313 | break; | |
314 | ||
315 | case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: | |
316 | if (!d) { | |
317 | goto fail; | |
318 | } | |
3eff1f46 | 319 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
320 | goto incorrect_lun; |
321 | } | |
322 | s->resetting++; | |
323 | qdev_reset_all(&d->qdev); | |
324 | s->resetting--; | |
325 | break; | |
326 | ||
327 | case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: | |
328 | case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: | |
329 | case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: | |
330 | if (!d) { | |
331 | goto fail; | |
332 | } | |
3eff1f46 | 333 | if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) { |
06114d72 PB |
334 | goto incorrect_lun; |
335 | } | |
49e7e31a FZ |
336 | |
337 | /* Add 1 to "remaining" until virtio_scsi_do_tmf returns. | |
338 | * This way, if the bus starts calling back to the notifiers | |
339 | * even before we finish the loop, virtio_scsi_cancel_notify | |
340 | * will not complete the TMF too early. | |
341 | */ | |
342 | req->remaining = 1; | |
06114d72 PB |
343 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
344 | if (r->hba_private) { | |
3eff1f46 | 345 | if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) { |
06114d72 PB |
346 | /* "If there is any command present in the task set, then |
347 | * return a service response set to FUNCTION SUCCEEDED". | |
348 | */ | |
3eff1f46 | 349 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
06114d72 PB |
350 | break; |
351 | } else { | |
49e7e31a FZ |
352 | VirtIOSCSICancelNotifier *notifier; |
353 | ||
354 | req->remaining++; | |
633dccb4 | 355 | notifier = g_new(VirtIOSCSICancelNotifier, 1); |
49e7e31a FZ |
356 | notifier->notifier.notify = virtio_scsi_cancel_notify; |
357 | notifier->tmf_req = req; | |
358 | scsi_req_cancel_async(r, ¬ifier->notifier); | |
06114d72 PB |
359 | } |
360 | } | |
361 | } | |
49e7e31a FZ |
362 | if (--req->remaining > 0) { |
363 | ret = -EINPROGRESS; | |
364 | } | |
06114d72 PB |
365 | break; |
366 | ||
367 | case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: | |
3eff1f46 | 368 | target = req->req.tmf.lun[1]; |
06114d72 | 369 | s->resetting++; |
0866aca1 | 370 | QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
e1dc6815 | 371 | d = SCSI_DEVICE(kid->child); |
06114d72 PB |
372 | if (d->channel == 0 && d->id == target) { |
373 | qdev_reset_all(&d->qdev); | |
374 | } | |
375 | } | |
376 | s->resetting--; | |
377 | break; | |
378 | ||
379 | case VIRTIO_SCSI_T_TMF_CLEAR_ACA: | |
380 | default: | |
3eff1f46 | 381 | req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_REJECTED; |
06114d72 | 382 | break; |
326799c0 SH |
383 | } |
384 | ||
49e7e31a | 385 | return ret; |
06114d72 PB |
386 | |
387 | incorrect_lun: | |
3eff1f46 | 388 | req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN; |
49e7e31a | 389 | return ret; |
06114d72 PB |
390 | |
391 | fail: | |
3eff1f46 | 392 | req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET; |
49e7e31a | 393 | return ret; |
326799c0 SH |
394 | } |
395 | ||
a8f2e5c8 | 396 | static void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req) |
973abc7f | 397 | { |
dc56b7c4 | 398 | VirtIODevice *vdev = (VirtIODevice *)s; |
024d9adc | 399 | uint32_t type; |
49e7e31a | 400 | int r = 0; |
326799c0 | 401 | |
dc56b7c4 FZ |
402 | if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0, |
403 | &type, sizeof(type)) < sizeof(type)) { | |
661e32fb | 404 | virtio_scsi_bad_req(req); |
dc56b7c4 FZ |
405 | return; |
406 | } | |
36b15c79 | 407 | |
024d9adc BW |
408 | virtio_tswap32s(vdev, &type); |
409 | if (type == VIRTIO_SCSI_T_TMF) { | |
dc56b7c4 FZ |
410 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlTMFReq), |
411 | sizeof(VirtIOSCSICtrlTMFResp)) < 0) { | |
661e32fb GK |
412 | virtio_scsi_bad_req(req); |
413 | return; | |
dc56b7c4 | 414 | } else { |
49e7e31a | 415 | r = virtio_scsi_do_tmf(s, req); |
b0b4ea17 | 416 | } |
06114d72 | 417 | |
024d9adc BW |
418 | } else if (type == VIRTIO_SCSI_T_AN_QUERY || |
419 | type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { | |
dc56b7c4 FZ |
420 | if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlANReq), |
421 | sizeof(VirtIOSCSICtrlANResp)) < 0) { | |
661e32fb GK |
422 | virtio_scsi_bad_req(req); |
423 | return; | |
dc56b7c4 FZ |
424 | } else { |
425 | req->resp.an.event_actual = 0; | |
426 | req->resp.an.response = VIRTIO_SCSI_S_OK; | |
06114d72 | 427 | } |
dc56b7c4 | 428 | } |
49e7e31a FZ |
429 | if (r == 0) { |
430 | virtio_scsi_complete_req(req); | |
431 | } else { | |
432 | assert(r == -EINPROGRESS); | |
433 | } | |
dc56b7c4 FZ |
434 | } |
435 | ||
07931698 | 436 | bool virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq) |
dc56b7c4 | 437 | { |
dc56b7c4 | 438 | VirtIOSCSIReq *req; |
07931698 | 439 | bool progress = false; |
dc56b7c4 FZ |
440 | |
441 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
07931698 | 442 | progress = true; |
dc56b7c4 | 443 | virtio_scsi_handle_ctrl_req(s, req); |
326799c0 | 444 | } |
07931698 | 445 | return progress; |
326799c0 SH |
446 | } |
447 | ||
a8f2e5c8 PB |
448 | static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
449 | { | |
450 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; | |
451 | ||
452 | if (s->ctx) { | |
ad07cd69 | 453 | virtio_device_start_ioeventfd(vdev); |
a8f2e5c8 PB |
454 | if (!s->dataplane_fenced) { |
455 | return; | |
456 | } | |
457 | } | |
71407786 | 458 | virtio_scsi_acquire(s); |
a8f2e5c8 | 459 | virtio_scsi_handle_ctrl_vq(s, vq); |
71407786 | 460 | virtio_scsi_release(s); |
a8f2e5c8 PB |
461 | } |
462 | ||
a3de269c PB |
463 | static void virtio_scsi_complete_cmd_req(VirtIOSCSIReq *req) |
464 | { | |
3eff1f46 PB |
465 | /* Sense data is not in req->resp and is copied separately |
466 | * in virtio_scsi_command_complete. | |
467 | */ | |
468 | req->resp_size = sizeof(VirtIOSCSICmdResp); | |
a3de269c PB |
469 | virtio_scsi_complete_req(req); |
470 | } | |
471 | ||
2ccdcd8d PB |
472 | static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
473 | size_t resid) | |
474 | { | |
475 | VirtIOSCSIReq *req = r->hba_private; | |
489c7901 | 476 | uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
474ee55a | 477 | uint32_t sense_len; |
8c085dbe | 478 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); |
2ccdcd8d | 479 | |
e9c0f0f5 EF |
480 | if (r->io_canceled) { |
481 | return; | |
482 | } | |
483 | ||
3eff1f46 PB |
484 | req->resp.cmd.response = VIRTIO_SCSI_S_OK; |
485 | req->resp.cmd.status = status; | |
486 | if (req->resp.cmd.status == GOOD) { | |
8c085dbe | 487 | req->resp.cmd.resid = virtio_tswap32(vdev, resid); |
2ccdcd8d | 488 | } else { |
3eff1f46 | 489 | req->resp.cmd.resid = 0; |
489c7901 | 490 | sense_len = scsi_req_get_sense(r, sense, sizeof(sense)); |
3eff1f46 PB |
491 | sense_len = MIN(sense_len, req->resp_iov.size - sizeof(req->resp.cmd)); |
492 | qemu_iovec_from_buf(&req->resp_iov, sizeof(req->resp.cmd), | |
b7890c40 | 493 | sense, sense_len); |
8c085dbe | 494 | req->resp.cmd.sense_len = virtio_tswap32(vdev, sense_len); |
2ccdcd8d | 495 | } |
a3de269c | 496 | virtio_scsi_complete_cmd_req(req); |
2ccdcd8d PB |
497 | } |
498 | ||
33cbb2c5 PB |
499 | static int virtio_scsi_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, |
500 | uint8_t *buf, void *hba_private) | |
501 | { | |
502 | VirtIOSCSIReq *req = hba_private; | |
503 | ||
504 | if (cmd->len == 0) { | |
03325525 | 505 | cmd->len = MIN(VIRTIO_SCSI_CDB_DEFAULT_SIZE, SCSI_CMD_BUF_SIZE); |
33cbb2c5 PB |
506 | memcpy(cmd->buf, buf, cmd->len); |
507 | } | |
508 | ||
509 | /* Extract the direction and mode directly from the request, for | |
510 | * host device passthrough. | |
511 | */ | |
512 | cmd->xfer = req->qsgl.size; | |
9df7bfdd | 513 | cmd->mode = req->mode; |
33cbb2c5 PB |
514 | return 0; |
515 | } | |
516 | ||
2ccdcd8d PB |
517 | static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) |
518 | { | |
519 | VirtIOSCSIReq *req = r->hba_private; | |
520 | ||
521 | return &req->qsgl; | |
522 | } | |
523 | ||
524 | static void virtio_scsi_request_cancelled(SCSIRequest *r) | |
525 | { | |
526 | VirtIOSCSIReq *req = r->hba_private; | |
527 | ||
528 | if (!req) { | |
529 | return; | |
530 | } | |
06114d72 | 531 | if (req->dev->resetting) { |
3eff1f46 | 532 | req->resp.cmd.response = VIRTIO_SCSI_S_RESET; |
06114d72 | 533 | } else { |
3eff1f46 | 534 | req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED; |
06114d72 | 535 | } |
a3de269c | 536 | virtio_scsi_complete_cmd_req(req); |
2ccdcd8d PB |
537 | } |
538 | ||
539 | static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) | |
326799c0 | 540 | { |
3eff1f46 | 541 | req->resp.cmd.response = VIRTIO_SCSI_S_FAILURE; |
a3de269c | 542 | virtio_scsi_complete_cmd_req(req); |
973abc7f SH |
543 | } |
544 | ||
661e32fb | 545 | static int virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req) |
bf359a44 FZ |
546 | { |
547 | VirtIOSCSICommon *vs = &s->parent_obj; | |
bf359a44 FZ |
548 | SCSIDevice *d; |
549 | int rc; | |
550 | ||
551 | rc = virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size, | |
552 | sizeof(VirtIOSCSICmdResp) + vs->sense_size); | |
553 | if (rc < 0) { | |
554 | if (rc == -ENOTSUP) { | |
555 | virtio_scsi_fail_cmd_req(req); | |
661e32fb | 556 | return -ENOTSUP; |
bf359a44 | 557 | } else { |
661e32fb GK |
558 | virtio_scsi_bad_req(req); |
559 | return -EINVAL; | |
bf359a44 | 560 | } |
bf359a44 FZ |
561 | } |
562 | ||
563 | d = virtio_scsi_device_find(s, req->req.cmd.lun); | |
564 | if (!d) { | |
565 | req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET; | |
566 | virtio_scsi_complete_cmd_req(req); | |
661e32fb | 567 | return -ENOENT; |
bf359a44 | 568 | } |
2a2d69f4 | 569 | virtio_scsi_ctx_check(s, d); |
bf359a44 FZ |
570 | req->sreq = scsi_req_new(d, req->req.cmd.tag, |
571 | virtio_scsi_get_lun(req->req.cmd.lun), | |
bb72463b | 572 | req->req.cmd.cdb, req); |
bf359a44 FZ |
573 | |
574 | if (req->sreq->cmd.mode != SCSI_XFER_NONE | |
575 | && (req->sreq->cmd.mode != req->mode || | |
576 | req->sreq->cmd.xfer > req->qsgl.size)) { | |
577 | req->resp.cmd.response = VIRTIO_SCSI_S_OVERRUN; | |
578 | virtio_scsi_complete_cmd_req(req); | |
661e32fb | 579 | return -ENOBUFS; |
bf359a44 | 580 | } |
5170f40b | 581 | scsi_req_ref(req->sreq); |
4be74634 | 582 | blk_io_plug(d->conf.blk); |
661e32fb | 583 | return 0; |
359eea71 | 584 | } |
bf359a44 | 585 | |
a8f2e5c8 | 586 | static void virtio_scsi_handle_cmd_req_submit(VirtIOSCSI *s, VirtIOSCSIReq *req) |
359eea71 | 587 | { |
35e4e96c PB |
588 | SCSIRequest *sreq = req->sreq; |
589 | if (scsi_req_enqueue(sreq)) { | |
590 | scsi_req_continue(sreq); | |
bf359a44 | 591 | } |
4be74634 | 592 | blk_io_unplug(sreq->dev->conf.blk); |
35e4e96c | 593 | scsi_req_unref(sreq); |
bf359a44 FZ |
594 | } |
595 | ||
07931698 | 596 | bool virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq) |
973abc7f | 597 | { |
1880ad4f | 598 | VirtIOSCSIReq *req, *next; |
23425cc2 | 599 | int ret = 0; |
d0435bc5 | 600 | bool suppress_notifications = virtio_queue_get_notification(vq); |
07931698 | 601 | bool progress = false; |
661e32fb | 602 | |
1880ad4f | 603 | QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs); |
326799c0 | 604 | |
23425cc2 | 605 | do { |
d0435bc5 SH |
606 | if (suppress_notifications) { |
607 | virtio_queue_set_notification(vq, 0); | |
608 | } | |
23425cc2 SH |
609 | |
610 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
07931698 | 611 | progress = true; |
23425cc2 SH |
612 | ret = virtio_scsi_handle_cmd_req_prepare(s, req); |
613 | if (!ret) { | |
614 | QTAILQ_INSERT_TAIL(&reqs, req, next); | |
615 | } else if (ret == -EINVAL) { | |
616 | /* The device is broken and shouldn't process any request */ | |
617 | while (!QTAILQ_EMPTY(&reqs)) { | |
618 | req = QTAILQ_FIRST(&reqs); | |
619 | QTAILQ_REMOVE(&reqs, req, next); | |
620 | blk_io_unplug(req->sreq->dev->conf.blk); | |
621 | scsi_req_unref(req->sreq); | |
622 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
623 | virtio_scsi_free_req(req); | |
624 | } | |
661e32fb | 625 | } |
359eea71 | 626 | } |
23425cc2 | 627 | |
d0435bc5 SH |
628 | if (suppress_notifications) { |
629 | virtio_queue_set_notification(vq, 1); | |
630 | } | |
23425cc2 | 631 | } while (ret != -EINVAL && !virtio_queue_empty(vq)); |
1880ad4f FZ |
632 | |
633 | QTAILQ_FOREACH_SAFE(req, &reqs, next, next) { | |
634 | virtio_scsi_handle_cmd_req_submit(s, req); | |
635 | } | |
07931698 | 636 | return progress; |
973abc7f SH |
637 | } |
638 | ||
a8f2e5c8 PB |
639 | static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) |
640 | { | |
641 | /* use non-QOM casts in the data path */ | |
642 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; | |
643 | ||
644 | if (s->ctx) { | |
ad07cd69 | 645 | virtio_device_start_ioeventfd(vdev); |
a8f2e5c8 PB |
646 | if (!s->dataplane_fenced) { |
647 | return; | |
648 | } | |
649 | } | |
71407786 | 650 | virtio_scsi_acquire(s); |
a8f2e5c8 | 651 | virtio_scsi_handle_cmd_vq(s, vq); |
71407786 | 652 | virtio_scsi_release(s); |
a8f2e5c8 PB |
653 | } |
654 | ||
973abc7f SH |
655 | static void virtio_scsi_get_config(VirtIODevice *vdev, |
656 | uint8_t *config) | |
657 | { | |
658 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 659 | VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
973abc7f | 660 | |
8c085dbe | 661 | virtio_stl_p(vdev, &scsiconf->num_queues, s->conf.num_queues); |
1bf8a989 DP |
662 | virtio_stl_p(vdev, &scsiconf->seg_max, |
663 | s->conf.seg_max_adjust ? s->conf.virtqueue_size - 2 : 128 - 2); | |
8c085dbe RR |
664 | virtio_stl_p(vdev, &scsiconf->max_sectors, s->conf.max_sectors); |
665 | virtio_stl_p(vdev, &scsiconf->cmd_per_lun, s->conf.cmd_per_lun); | |
666 | virtio_stl_p(vdev, &scsiconf->event_info_size, sizeof(VirtIOSCSIEvent)); | |
667 | virtio_stl_p(vdev, &scsiconf->sense_size, s->sense_size); | |
668 | virtio_stl_p(vdev, &scsiconf->cdb_size, s->cdb_size); | |
669 | virtio_stw_p(vdev, &scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); | |
670 | virtio_stw_p(vdev, &scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); | |
671 | virtio_stl_p(vdev, &scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); | |
973abc7f SH |
672 | } |
673 | ||
674 | static void virtio_scsi_set_config(VirtIODevice *vdev, | |
675 | const uint8_t *config) | |
676 | { | |
677 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 678 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
973abc7f | 679 | |
8c085dbe RR |
680 | if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) >= 65536 || |
681 | (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) >= 256) { | |
ad14a46a GK |
682 | virtio_error(vdev, |
683 | "bad data written to virtio-scsi configuration space"); | |
684 | return; | |
973abc7f SH |
685 | } |
686 | ||
8c085dbe RR |
687 | vs->sense_size = virtio_ldl_p(vdev, &scsiconf->sense_size); |
688 | vs->cdb_size = virtio_ldl_p(vdev, &scsiconf->cdb_size); | |
973abc7f SH |
689 | } |
690 | ||
019a3edb | 691 | static uint64_t virtio_scsi_get_features(VirtIODevice *vdev, |
9d5b731d JW |
692 | uint64_t requested_features, |
693 | Error **errp) | |
973abc7f | 694 | { |
da2f84d1 SZ |
695 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
696 | ||
697 | /* Firstly sync all virtio-scsi possible supported features */ | |
698 | requested_features |= s->host_features; | |
973abc7f SH |
699 | return requested_features; |
700 | } | |
701 | ||
702 | static void virtio_scsi_reset(VirtIODevice *vdev) | |
703 | { | |
292c8e50 PB |
704 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
705 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); | |
973abc7f | 706 | |
ad07cd69 | 707 | assert(!s->dataplane_started); |
47a150a4 | 708 | s->resetting++; |
824755ba | 709 | qbus_reset_all(BUS(&s->bus)); |
47a150a4 PB |
710 | s->resetting--; |
711 | ||
03325525 MT |
712 | vs->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE; |
713 | vs->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE; | |
2baa1beb | 714 | s->events_dropped = false; |
973abc7f SH |
715 | } |
716 | ||
20e6dca1 FZ |
717 | void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
718 | uint32_t event, uint32_t reason) | |
b6866fee | 719 | { |
292c8e50 | 720 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
91e7fcca | 721 | VirtIOSCSIReq *req; |
b6866fee | 722 | VirtIOSCSIEvent *evt; |
0ac8e139 | 723 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
b6866fee | 724 | |
0ac8e139 | 725 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
cd41a671 PB |
726 | return; |
727 | } | |
728 | ||
e24a47c5 | 729 | req = virtio_scsi_pop_req(s, vs->event_vq); |
64f64855 PB |
730 | if (!req) { |
731 | s->events_dropped = true; | |
71407786 | 732 | return; |
64f64855 | 733 | } |
b6866fee | 734 | |
64f64855 PB |
735 | if (s->events_dropped) { |
736 | event |= VIRTIO_SCSI_T_EVENTS_MISSED; | |
737 | s->events_dropped = false; | |
738 | } | |
739 | ||
dfecbb95 | 740 | if (virtio_scsi_parse_req(req, 0, sizeof(VirtIOSCSIEvent))) { |
661e32fb | 741 | virtio_scsi_bad_req(req); |
71407786 | 742 | return; |
64f64855 PB |
743 | } |
744 | ||
3eff1f46 | 745 | evt = &req->resp.event; |
64f64855 | 746 | memset(evt, 0, sizeof(VirtIOSCSIEvent)); |
424baff5 CLG |
747 | evt->event = virtio_tswap32(vdev, event); |
748 | evt->reason = virtio_tswap32(vdev, reason); | |
64f64855 | 749 | if (!dev) { |
49fb65c7 | 750 | assert(event == VIRTIO_SCSI_T_EVENTS_MISSED); |
64f64855 | 751 | } else { |
b6866fee CM |
752 | evt->lun[0] = 1; |
753 | evt->lun[1] = dev->id; | |
754 | ||
755 | /* Linux wants us to keep the same encoding we use for REPORT LUNS. */ | |
756 | if (dev->lun >= 256) { | |
757 | evt->lun[2] = (dev->lun >> 8) | 0x40; | |
758 | } | |
759 | evt->lun[3] = dev->lun & 0xFF; | |
64f64855 PB |
760 | } |
761 | virtio_scsi_complete_req(req); | |
762 | } | |
763 | ||
07931698 | 764 | bool virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq) |
a8f2e5c8 PB |
765 | { |
766 | if (s->events_dropped) { | |
767 | virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); | |
07931698 | 768 | return true; |
a8f2e5c8 | 769 | } |
07931698 | 770 | return false; |
a8f2e5c8 PB |
771 | } |
772 | ||
64f64855 PB |
773 | static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) |
774 | { | |
0ac8e139 | 775 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
64f64855 | 776 | |
a8f2e5c8 | 777 | if (s->ctx) { |
ad07cd69 | 778 | virtio_device_start_ioeventfd(vdev); |
a8f2e5c8 PB |
779 | if (!s->dataplane_fenced) { |
780 | return; | |
781 | } | |
b6866fee | 782 | } |
71407786 | 783 | virtio_scsi_acquire(s); |
a8f2e5c8 | 784 | virtio_scsi_handle_event_vq(s, vq); |
71407786 | 785 | virtio_scsi_release(s); |
b6866fee CM |
786 | } |
787 | ||
feda01e4 PB |
788 | static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
789 | { | |
790 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
0ac8e139 | 791 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
feda01e4 | 792 | |
95129d6f | 793 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_CHANGE) && |
feda01e4 | 794 | dev->type != TYPE_ROM) { |
71407786 | 795 | virtio_scsi_acquire(s); |
feda01e4 PB |
796 | virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, |
797 | sense.asc | (sense.ascq << 8)); | |
71407786 | 798 | virtio_scsi_release(s); |
feda01e4 PB |
799 | } |
800 | } | |
801 | ||
4f71fb43 KW |
802 | static void virtio_scsi_pre_hotplug(HotplugHandler *hotplug_dev, |
803 | DeviceState *dev, Error **errp) | |
804 | { | |
805 | SCSIDevice *sd = SCSI_DEVICE(dev); | |
806 | sd->hba_supports_iothread = true; | |
807 | } | |
808 | ||
02206e52 IM |
809 | static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev, |
810 | Error **errp) | |
b6866fee | 811 | { |
02206e52 | 812 | VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev); |
3e2b2a9c FZ |
813 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
814 | SCSIDevice *sd = SCSI_DEVICE(dev); | |
97896a48 | 815 | int ret; |
3e2b2a9c | 816 | |
43c696a2 | 817 | if (s->ctx && !s->dataplane_fenced) { |
3e2b2a9c FZ |
818 | if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) { |
819 | return; | |
eb97813f | 820 | } |
e7a9f353 | 821 | virtio_scsi_acquire(s); |
97896a48 | 822 | ret = blk_set_aio_context(sd->conf.blk, s->ctx, errp); |
e7a9f353 | 823 | virtio_scsi_release(s); |
97896a48 KW |
824 | if (ret < 0) { |
825 | return; | |
826 | } | |
8b5e6caf | 827 | } |
b6866fee | 828 | |
95129d6f | 829 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) { |
71407786 | 830 | virtio_scsi_acquire(s); |
3e2b2a9c | 831 | virtio_scsi_push_event(s, sd, |
02206e52 | 832 | VIRTIO_SCSI_T_TRANSPORT_RESET, |
b6866fee | 833 | VIRTIO_SCSI_EVT_RESET_RESCAN); |
71407786 | 834 | virtio_scsi_release(s); |
b6866fee CM |
835 | } |
836 | } | |
837 | ||
02206e52 IM |
838 | static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, |
839 | Error **errp) | |
b6866fee | 840 | { |
02206e52 | 841 | VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev); |
3e2b2a9c FZ |
842 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
843 | SCSIDevice *sd = SCSI_DEVICE(dev); | |
9c5aad84 | 844 | AioContext *ctx = s->ctx ?: qemu_get_aio_context(); |
b6866fee | 845 | |
95129d6f | 846 | if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) { |
71407786 | 847 | virtio_scsi_acquire(s); |
3e2b2a9c | 848 | virtio_scsi_push_event(s, sd, |
02206e52 | 849 | VIRTIO_SCSI_T_TRANSPORT_RESET, |
b6866fee | 850 | VIRTIO_SCSI_EVT_RESET_REMOVED); |
71407786 | 851 | virtio_scsi_release(s); |
b6866fee | 852 | } |
3e2b2a9c | 853 | |
9c5aad84 ZL |
854 | aio_disable_external(ctx); |
855 | qdev_simple_device_unplug_cb(hotplug_dev, dev, errp); | |
856 | aio_enable_external(ctx); | |
857 | ||
a6f230c8 AG |
858 | if (s->ctx) { |
859 | virtio_scsi_acquire(s); | |
97896a48 KW |
860 | /* If other users keep the BlockBackend in the iothread, that's ok */ |
861 | blk_set_aio_context(sd->conf.blk, qemu_get_aio_context(), NULL); | |
a6f230c8 AG |
862 | virtio_scsi_release(s); |
863 | } | |
b6866fee CM |
864 | } |
865 | ||
2ccdcd8d PB |
866 | static struct SCSIBusInfo virtio_scsi_scsi_info = { |
867 | .tcq = true, | |
868 | .max_channel = VIRTIO_SCSI_MAX_CHANNEL, | |
869 | .max_target = VIRTIO_SCSI_MAX_TARGET, | |
870 | .max_lun = VIRTIO_SCSI_MAX_LUN, | |
871 | ||
872 | .complete = virtio_scsi_command_complete, | |
873 | .cancel = virtio_scsi_request_cancelled, | |
feda01e4 | 874 | .change = virtio_scsi_change, |
33cbb2c5 | 875 | .parse_cdb = virtio_scsi_parse_cdb, |
2ccdcd8d | 876 | .get_sg_list = virtio_scsi_get_sg_list, |
5db1764c PB |
877 | .save_request = virtio_scsi_save_request, |
878 | .load_request = virtio_scsi_load_request, | |
2ccdcd8d PB |
879 | }; |
880 | ||
bf46e67d | 881 | void virtio_scsi_common_realize(DeviceState *dev, |
209b27bb FZ |
882 | VirtIOHandleOutput ctrl, |
883 | VirtIOHandleOutput evt, | |
bf46e67d FZ |
884 | VirtIOHandleOutput cmd, |
885 | Error **errp) | |
973abc7f | 886 | { |
71a6520b AF |
887 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
888 | VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev); | |
d2ad7dd4 | 889 | int i; |
973abc7f | 890 | |
7598f0f3 | 891 | virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI, |
763684be | 892 | sizeof(VirtIOSCSIConfig)); |
3ab1dfdd | 893 | |
0ba1f531 | 894 | if (s->conf.num_queues == 0 || |
87b3bd1c | 895 | s->conf.num_queues > VIRTIO_QUEUE_MAX - 2) { |
0ba1f531 | 896 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
c9f65528 | 897 | "must be a positive integer less than %d.", |
87b3bd1c | 898 | s->conf.num_queues, VIRTIO_QUEUE_MAX - 2); |
93bd49af | 899 | virtio_cleanup(vdev); |
c9f65528 FZ |
900 | return; |
901 | } | |
1bf8a989 DP |
902 | if (s->conf.virtqueue_size <= 2) { |
903 | error_setg(errp, "invalid virtqueue_size property (= %" PRIu32 "), " | |
904 | "must be > 2", s->conf.virtqueue_size); | |
905 | return; | |
906 | } | |
3c55fe2a | 907 | s->cmd_vqs = g_new0(VirtQueue *, s->conf.num_queues); |
03325525 MT |
908 | s->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE; |
909 | s->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE; | |
3ab1dfdd | 910 | |
5c0919d0 RJ |
911 | s->ctrl_vq = virtio_add_queue(vdev, s->conf.virtqueue_size, ctrl); |
912 | s->event_vq = virtio_add_queue(vdev, s->conf.virtqueue_size, evt); | |
394e2e4c | 913 | for (i = 0; i < s->conf.num_queues; i++) { |
5c0919d0 | 914 | s->cmd_vqs[i] = virtio_add_queue(vdev, s->conf.virtqueue_size, cmd); |
9786b592 | 915 | } |
292c8e50 PB |
916 | } |
917 | ||
71a6520b | 918 | static void virtio_scsi_device_realize(DeviceState *dev, Error **errp) |
292c8e50 | 919 | { |
71a6520b | 920 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
7598f0f3 | 921 | VirtIOSCSI *s = VIRTIO_SCSI(dev); |
caad4eb3 | 922 | Error *err = NULL; |
292c8e50 | 923 | |
bf46e67d FZ |
924 | virtio_scsi_common_realize(dev, |
925 | virtio_scsi_handle_ctrl, | |
91d670fb | 926 | virtio_scsi_handle_event, |
bf46e67d FZ |
927 | virtio_scsi_handle_cmd, |
928 | &err); | |
71a6520b AF |
929 | if (err != NULL) { |
930 | error_propagate(errp, err); | |
931 | return; | |
292c8e50 PB |
932 | } |
933 | ||
7598f0f3 | 934 | scsi_bus_new(&s->bus, sizeof(s->bus), dev, |
b1187b51 | 935 | &virtio_scsi_scsi_info, vdev->bus_name); |
02206e52 | 936 | /* override default SCSI bus hotplug-handler, with virtio-scsi's one */ |
94d1cc5f | 937 | qbus_set_hotplug_handler(BUS(&s->bus), OBJECT(dev), &error_abort); |
6f32a6b4 | 938 | |
ad07cd69 | 939 | virtio_scsi_dataplane_setup(s, errp); |
3ab1dfdd FK |
940 | } |
941 | ||
12e1dc49 | 942 | void virtio_scsi_common_unrealize(DeviceState *dev) |
292c8e50 | 943 | { |
306ec6c3 AF |
944 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
945 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev); | |
292c8e50 PB |
946 | |
947 | g_free(vs->cmd_vqs); | |
6a1a8cc7 | 948 | virtio_cleanup(vdev); |
292c8e50 PB |
949 | } |
950 | ||
306ec6c3 | 951 | static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp) |
3ab1dfdd | 952 | { |
2cbe2de5 FZ |
953 | VirtIOSCSI *s = VIRTIO_SCSI(dev); |
954 | ||
955 | qbus_set_hotplug_handler(BUS(&s->bus), NULL, &error_abort); | |
12e1dc49 | 956 | virtio_scsi_common_unrealize(dev); |
3ab1dfdd FK |
957 | } |
958 | ||
959 | static Property virtio_scsi_properties[] = { | |
0c63237a | 960 | DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues, 1), |
5c0919d0 RJ |
961 | DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSI, |
962 | parent_obj.conf.virtqueue_size, 128), | |
1bf8a989 DP |
963 | DEFINE_PROP_BOOL("seg_max_adjust", VirtIOSCSI, |
964 | parent_obj.conf.seg_max_adjust, true), | |
0c63237a SZ |
965 | DEFINE_PROP_UINT32("max_sectors", VirtIOSCSI, parent_obj.conf.max_sectors, |
966 | 0xFFFF), | |
967 | DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSI, parent_obj.conf.cmd_per_lun, | |
968 | 128), | |
0c63237a SZ |
969 | DEFINE_PROP_BIT("hotplug", VirtIOSCSI, host_features, |
970 | VIRTIO_SCSI_F_HOTPLUG, true), | |
971 | DEFINE_PROP_BIT("param_change", VirtIOSCSI, host_features, | |
972 | VIRTIO_SCSI_F_CHANGE, true), | |
08f1ecd8 FZ |
973 | DEFINE_PROP_LINK("iothread", VirtIOSCSI, parent_obj.conf.iothread, |
974 | TYPE_IOTHREAD, IOThread *), | |
3ab1dfdd FK |
975 | DEFINE_PROP_END_OF_LIST(), |
976 | }; | |
977 | ||
f20476b9 HP |
978 | static const VMStateDescription vmstate_virtio_scsi = { |
979 | .name = "virtio-scsi", | |
980 | .minimum_version_id = 1, | |
981 | .version_id = 1, | |
982 | .fields = (VMStateField[]) { | |
983 | VMSTATE_VIRTIO_DEVICE, | |
984 | VMSTATE_END_OF_LIST() | |
985 | }, | |
986 | }; | |
5a289a28 | 987 | |
292c8e50 PB |
988 | static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
989 | { | |
990 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
125ee0ed | 991 | DeviceClass *dc = DEVICE_CLASS(klass); |
292c8e50 PB |
992 | |
993 | vdc->get_config = virtio_scsi_get_config; | |
125ee0ed | 994 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
292c8e50 PB |
995 | } |
996 | ||
3ab1dfdd FK |
997 | static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
998 | { | |
999 | DeviceClass *dc = DEVICE_CLASS(klass); | |
1000 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
02206e52 | 1001 | HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); |
71a6520b | 1002 | |
3ab1dfdd | 1003 | dc->props = virtio_scsi_properties; |
5a289a28 | 1004 | dc->vmsd = &vmstate_virtio_scsi; |
125ee0ed | 1005 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
71a6520b | 1006 | vdc->realize = virtio_scsi_device_realize; |
306ec6c3 | 1007 | vdc->unrealize = virtio_scsi_device_unrealize; |
3ab1dfdd FK |
1008 | vdc->set_config = virtio_scsi_set_config; |
1009 | vdc->get_features = virtio_scsi_get_features; | |
1010 | vdc->reset = virtio_scsi_reset; | |
ad07cd69 PB |
1011 | vdc->start_ioeventfd = virtio_scsi_dataplane_start; |
1012 | vdc->stop_ioeventfd = virtio_scsi_dataplane_stop; | |
4f71fb43 | 1013 | hc->pre_plug = virtio_scsi_pre_hotplug; |
02206e52 IM |
1014 | hc->plug = virtio_scsi_hotplug; |
1015 | hc->unplug = virtio_scsi_hotunplug; | |
3ab1dfdd FK |
1016 | } |
1017 | ||
292c8e50 PB |
1018 | static const TypeInfo virtio_scsi_common_info = { |
1019 | .name = TYPE_VIRTIO_SCSI_COMMON, | |
1020 | .parent = TYPE_VIRTIO_DEVICE, | |
1021 | .instance_size = sizeof(VirtIOSCSICommon), | |
a27292b5 | 1022 | .abstract = true, |
292c8e50 PB |
1023 | .class_init = virtio_scsi_common_class_init, |
1024 | }; | |
1025 | ||
3ab1dfdd FK |
1026 | static const TypeInfo virtio_scsi_info = { |
1027 | .name = TYPE_VIRTIO_SCSI, | |
292c8e50 | 1028 | .parent = TYPE_VIRTIO_SCSI_COMMON, |
3ab1dfdd FK |
1029 | .instance_size = sizeof(VirtIOSCSI), |
1030 | .class_init = virtio_scsi_class_init, | |
02206e52 IM |
1031 | .interfaces = (InterfaceInfo[]) { |
1032 | { TYPE_HOTPLUG_HANDLER }, | |
1033 | { } | |
1034 | } | |
3ab1dfdd FK |
1035 | }; |
1036 | ||
1037 | static void virtio_register_types(void) | |
1038 | { | |
292c8e50 | 1039 | type_register_static(&virtio_scsi_common_info); |
3ab1dfdd FK |
1040 | type_register_static(&virtio_scsi_info); |
1041 | } | |
1042 | ||
1043 | type_init(virtio_register_types) |