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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 | ||
0d09e41a | 16 | #include "hw/virtio/virtio-scsi.h" |
b4a42f81 | 17 | #include "qemu/error-report.h" |
0d09e41a PB |
18 | #include <hw/scsi/scsi.h> |
19 | #include <block/scsi.h> | |
20 | #include <hw/virtio/virtio-bus.h> | |
973abc7f | 21 | |
326799c0 SH |
22 | typedef struct VirtIOSCSIReq { |
23 | VirtIOSCSI *dev; | |
24 | VirtQueue *vq; | |
25 | VirtQueueElement elem; | |
26 | QEMUSGList qsgl; | |
27 | SCSIRequest *sreq; | |
28 | union { | |
29 | char *buf; | |
30 | VirtIOSCSICmdReq *cmd; | |
31 | VirtIOSCSICtrlTMFReq *tmf; | |
32 | VirtIOSCSICtrlANReq *an; | |
33 | } req; | |
34 | union { | |
35 | char *buf; | |
36 | VirtIOSCSICmdResp *cmd; | |
37 | VirtIOSCSICtrlTMFResp *tmf; | |
38 | VirtIOSCSICtrlANResp *an; | |
39 | VirtIOSCSIEvent *event; | |
40 | } resp; | |
41 | } VirtIOSCSIReq; | |
42 | ||
2ccdcd8d PB |
43 | static inline int virtio_scsi_get_lun(uint8_t *lun) |
44 | { | |
45 | return ((lun[2] << 8) | lun[3]) & 0x3FFF; | |
46 | } | |
47 | ||
48 | static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) | |
49 | { | |
50 | if (lun[0] != 1) { | |
51 | return NULL; | |
52 | } | |
53 | if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { | |
54 | return NULL; | |
55 | } | |
56 | return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); | |
57 | } | |
58 | ||
326799c0 SH |
59 | static void virtio_scsi_complete_req(VirtIOSCSIReq *req) |
60 | { | |
61 | VirtIOSCSI *s = req->dev; | |
62 | VirtQueue *vq = req->vq; | |
0ac8e139 | 63 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
326799c0 SH |
64 | virtqueue_push(vq, &req->elem, req->qsgl.size + req->elem.in_sg[0].iov_len); |
65 | qemu_sglist_destroy(&req->qsgl); | |
66 | if (req->sreq) { | |
67 | req->sreq->hba_private = NULL; | |
68 | scsi_req_unref(req->sreq); | |
69 | } | |
70 | g_free(req); | |
0ac8e139 | 71 | virtio_notify(vdev, vq); |
326799c0 SH |
72 | } |
73 | ||
74 | static void virtio_scsi_bad_req(void) | |
75 | { | |
76 | error_report("wrong size for virtio-scsi headers"); | |
77 | exit(1); | |
78 | } | |
79 | ||
80 | static void qemu_sgl_init_external(QEMUSGList *qsgl, struct iovec *sg, | |
a8170e5e | 81 | hwaddr *addr, int num) |
326799c0 | 82 | { |
dd72fdd0 | 83 | qemu_sglist_init(qsgl, num, &dma_context_memory); |
326799c0 SH |
84 | while (num--) { |
85 | qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len); | |
86 | } | |
87 | } | |
88 | ||
89 | static void virtio_scsi_parse_req(VirtIOSCSI *s, VirtQueue *vq, | |
90 | VirtIOSCSIReq *req) | |
91 | { | |
b6866fee | 92 | assert(req->elem.in_num); |
326799c0 SH |
93 | req->vq = vq; |
94 | req->dev = s; | |
95 | req->sreq = NULL; | |
b6866fee CM |
96 | if (req->elem.out_num) { |
97 | req->req.buf = req->elem.out_sg[0].iov_base; | |
98 | } | |
326799c0 SH |
99 | req->resp.buf = req->elem.in_sg[0].iov_base; |
100 | ||
101 | if (req->elem.out_num > 1) { | |
102 | qemu_sgl_init_external(&req->qsgl, &req->elem.out_sg[1], | |
103 | &req->elem.out_addr[1], | |
104 | req->elem.out_num - 1); | |
105 | } else { | |
106 | qemu_sgl_init_external(&req->qsgl, &req->elem.in_sg[1], | |
107 | &req->elem.in_addr[1], | |
108 | req->elem.in_num - 1); | |
109 | } | |
110 | } | |
111 | ||
112 | static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) | |
113 | { | |
114 | VirtIOSCSIReq *req; | |
115 | req = g_malloc(sizeof(*req)); | |
116 | if (!virtqueue_pop(vq, &req->elem)) { | |
117 | g_free(req); | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | virtio_scsi_parse_req(s, vq, req); | |
122 | return req; | |
123 | } | |
124 | ||
5db1764c PB |
125 | static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
126 | { | |
127 | VirtIOSCSIReq *req = sreq->hba_private; | |
292c8e50 | 128 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); |
d2ad7dd4 | 129 | uint32_t n = virtio_queue_get_id(req->vq) - 2; |
5db1764c | 130 | |
292c8e50 | 131 | assert(n < vs->conf.num_queues); |
fcf104a7 | 132 | qemu_put_be32s(f, &n); |
5db1764c PB |
133 | qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
134 | } | |
135 | ||
136 | static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) | |
137 | { | |
138 | SCSIBus *bus = sreq->bus; | |
139 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
292c8e50 | 140 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
5db1764c | 141 | VirtIOSCSIReq *req; |
fcf104a7 | 142 | uint32_t n; |
5db1764c PB |
143 | |
144 | req = g_malloc(sizeof(*req)); | |
fcf104a7 | 145 | qemu_get_be32s(f, &n); |
292c8e50 | 146 | assert(n < vs->conf.num_queues); |
5db1764c | 147 | qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
292c8e50 | 148 | virtio_scsi_parse_req(s, vs->cmd_vqs[n], req); |
5db1764c PB |
149 | |
150 | scsi_req_ref(sreq); | |
151 | req->sreq = sreq; | |
152 | if (req->sreq->cmd.mode != SCSI_XFER_NONE) { | |
153 | int req_mode = | |
154 | (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); | |
155 | ||
156 | assert(req->sreq->cmd.mode == req_mode); | |
157 | } | |
158 | return req; | |
159 | } | |
160 | ||
06114d72 | 161 | static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) |
326799c0 | 162 | { |
06114d72 PB |
163 | SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun); |
164 | SCSIRequest *r, *next; | |
0866aca1 | 165 | BusChild *kid; |
06114d72 PB |
166 | int target; |
167 | ||
168 | /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ | |
169 | req->resp.tmf->response = VIRTIO_SCSI_S_OK; | |
170 | ||
171 | switch (req->req.tmf->subtype) { | |
172 | case VIRTIO_SCSI_T_TMF_ABORT_TASK: | |
173 | case VIRTIO_SCSI_T_TMF_QUERY_TASK: | |
174 | if (!d) { | |
175 | goto fail; | |
176 | } | |
177 | if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { | |
178 | goto incorrect_lun; | |
179 | } | |
180 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { | |
4dd7c82c PB |
181 | VirtIOSCSIReq *cmd_req = r->hba_private; |
182 | if (cmd_req && cmd_req->req.cmd->tag == req->req.tmf->tag) { | |
06114d72 PB |
183 | break; |
184 | } | |
185 | } | |
4dd7c82c PB |
186 | if (r) { |
187 | /* | |
188 | * Assert that the request has not been completed yet, we | |
189 | * check for it in the loop above. | |
190 | */ | |
191 | assert(r->hba_private); | |
06114d72 PB |
192 | if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) { |
193 | /* "If the specified command is present in the task set, then | |
194 | * return a service response set to FUNCTION SUCCEEDED". | |
195 | */ | |
196 | req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; | |
197 | } else { | |
198 | scsi_req_cancel(r); | |
199 | } | |
200 | } | |
201 | break; | |
202 | ||
203 | case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: | |
204 | if (!d) { | |
205 | goto fail; | |
206 | } | |
207 | if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { | |
208 | goto incorrect_lun; | |
209 | } | |
210 | s->resetting++; | |
211 | qdev_reset_all(&d->qdev); | |
212 | s->resetting--; | |
213 | break; | |
214 | ||
215 | case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: | |
216 | case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: | |
217 | case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: | |
218 | if (!d) { | |
219 | goto fail; | |
220 | } | |
221 | if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { | |
222 | goto incorrect_lun; | |
223 | } | |
224 | QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { | |
225 | if (r->hba_private) { | |
226 | if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) { | |
227 | /* "If there is any command present in the task set, then | |
228 | * return a service response set to FUNCTION SUCCEEDED". | |
229 | */ | |
230 | req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; | |
231 | break; | |
232 | } else { | |
233 | scsi_req_cancel(r); | |
234 | } | |
235 | } | |
236 | } | |
237 | break; | |
238 | ||
239 | case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: | |
240 | target = req->req.tmf->lun[1]; | |
241 | s->resetting++; | |
0866aca1 AL |
242 | QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
243 | d = DO_UPCAST(SCSIDevice, qdev, kid->child); | |
06114d72 PB |
244 | if (d->channel == 0 && d->id == target) { |
245 | qdev_reset_all(&d->qdev); | |
246 | } | |
247 | } | |
248 | s->resetting--; | |
249 | break; | |
250 | ||
251 | case VIRTIO_SCSI_T_TMF_CLEAR_ACA: | |
252 | default: | |
253 | req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_REJECTED; | |
254 | break; | |
326799c0 SH |
255 | } |
256 | ||
06114d72 PB |
257 | return; |
258 | ||
259 | incorrect_lun: | |
260 | req->resp.tmf->response = VIRTIO_SCSI_S_INCORRECT_LUN; | |
261 | return; | |
262 | ||
263 | fail: | |
264 | req->resp.tmf->response = VIRTIO_SCSI_S_BAD_TARGET; | |
326799c0 SH |
265 | } |
266 | ||
973abc7f SH |
267 | static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
268 | { | |
326799c0 SH |
269 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
270 | VirtIOSCSIReq *req; | |
271 | ||
272 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
06114d72 PB |
273 | int out_size, in_size; |
274 | if (req->elem.out_num < 1 || req->elem.in_num < 1) { | |
275 | virtio_scsi_bad_req(); | |
276 | continue; | |
277 | } | |
278 | ||
279 | out_size = req->elem.out_sg[0].iov_len; | |
280 | in_size = req->elem.in_sg[0].iov_len; | |
281 | if (req->req.tmf->type == VIRTIO_SCSI_T_TMF) { | |
282 | if (out_size < sizeof(VirtIOSCSICtrlTMFReq) || | |
283 | in_size < sizeof(VirtIOSCSICtrlTMFResp)) { | |
284 | virtio_scsi_bad_req(); | |
285 | } | |
286 | virtio_scsi_do_tmf(s, req); | |
287 | ||
288 | } else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY || | |
289 | req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { | |
290 | if (out_size < sizeof(VirtIOSCSICtrlANReq) || | |
291 | in_size < sizeof(VirtIOSCSICtrlANResp)) { | |
292 | virtio_scsi_bad_req(); | |
293 | } | |
294 | req->resp.an->event_actual = 0; | |
295 | req->resp.an->response = VIRTIO_SCSI_S_OK; | |
296 | } | |
297 | virtio_scsi_complete_req(req); | |
326799c0 SH |
298 | } |
299 | } | |
300 | ||
2ccdcd8d PB |
301 | static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
302 | size_t resid) | |
303 | { | |
304 | VirtIOSCSIReq *req = r->hba_private; | |
474ee55a | 305 | uint32_t sense_len; |
2ccdcd8d PB |
306 | |
307 | req->resp.cmd->response = VIRTIO_SCSI_S_OK; | |
308 | req->resp.cmd->status = status; | |
309 | if (req->resp.cmd->status == GOOD) { | |
474ee55a | 310 | req->resp.cmd->resid = tswap32(resid); |
2ccdcd8d PB |
311 | } else { |
312 | req->resp.cmd->resid = 0; | |
474ee55a DG |
313 | sense_len = scsi_req_get_sense(r, req->resp.cmd->sense, |
314 | VIRTIO_SCSI_SENSE_SIZE); | |
315 | req->resp.cmd->sense_len = tswap32(sense_len); | |
2ccdcd8d PB |
316 | } |
317 | virtio_scsi_complete_req(req); | |
318 | } | |
319 | ||
320 | static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) | |
321 | { | |
322 | VirtIOSCSIReq *req = r->hba_private; | |
323 | ||
324 | return &req->qsgl; | |
325 | } | |
326 | ||
327 | static void virtio_scsi_request_cancelled(SCSIRequest *r) | |
328 | { | |
329 | VirtIOSCSIReq *req = r->hba_private; | |
330 | ||
331 | if (!req) { | |
332 | return; | |
333 | } | |
06114d72 PB |
334 | if (req->dev->resetting) { |
335 | req->resp.cmd->response = VIRTIO_SCSI_S_RESET; | |
336 | } else { | |
337 | req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED; | |
338 | } | |
2ccdcd8d PB |
339 | virtio_scsi_complete_req(req); |
340 | } | |
341 | ||
342 | static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) | |
326799c0 SH |
343 | { |
344 | req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE; | |
345 | virtio_scsi_complete_req(req); | |
973abc7f SH |
346 | } |
347 | ||
348 | static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) | |
349 | { | |
292c8e50 | 350 | /* use non-QOM casts in the data path */ |
326799c0 | 351 | VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
292c8e50 PB |
352 | VirtIOSCSICommon *vs = &s->parent_obj; |
353 | ||
326799c0 | 354 | VirtIOSCSIReq *req; |
2ccdcd8d | 355 | int n; |
326799c0 SH |
356 | |
357 | while ((req = virtio_scsi_pop_req(s, vq))) { | |
2ccdcd8d | 358 | SCSIDevice *d; |
326799c0 SH |
359 | int out_size, in_size; |
360 | if (req->elem.out_num < 1 || req->elem.in_num < 1) { | |
361 | virtio_scsi_bad_req(); | |
362 | } | |
363 | ||
364 | out_size = req->elem.out_sg[0].iov_len; | |
365 | in_size = req->elem.in_sg[0].iov_len; | |
292c8e50 PB |
366 | if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size || |
367 | in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) { | |
326799c0 SH |
368 | virtio_scsi_bad_req(); |
369 | } | |
370 | ||
371 | if (req->elem.out_num > 1 && req->elem.in_num > 1) { | |
2ccdcd8d | 372 | virtio_scsi_fail_cmd_req(req); |
326799c0 SH |
373 | continue; |
374 | } | |
375 | ||
2ccdcd8d PB |
376 | d = virtio_scsi_device_find(s, req->req.cmd->lun); |
377 | if (!d) { | |
378 | req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET; | |
379 | virtio_scsi_complete_req(req); | |
380 | continue; | |
381 | } | |
382 | req->sreq = scsi_req_new(d, req->req.cmd->tag, | |
383 | virtio_scsi_get_lun(req->req.cmd->lun), | |
384 | req->req.cmd->cdb, req); | |
385 | ||
386 | if (req->sreq->cmd.mode != SCSI_XFER_NONE) { | |
387 | int req_mode = | |
388 | (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); | |
389 | ||
390 | if (req->sreq->cmd.mode != req_mode || | |
391 | req->sreq->cmd.xfer > req->qsgl.size) { | |
392 | req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN; | |
393 | virtio_scsi_complete_req(req); | |
394 | continue; | |
395 | } | |
396 | } | |
397 | ||
398 | n = scsi_req_enqueue(req->sreq); | |
399 | if (n) { | |
400 | scsi_req_continue(req->sreq); | |
401 | } | |
326799c0 | 402 | } |
973abc7f SH |
403 | } |
404 | ||
405 | static void virtio_scsi_get_config(VirtIODevice *vdev, | |
406 | uint8_t *config) | |
407 | { | |
408 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 409 | VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
973abc7f | 410 | |
394e2e4c | 411 | stl_raw(&scsiconf->num_queues, s->conf.num_queues); |
973abc7f | 412 | stl_raw(&scsiconf->seg_max, 128 - 2); |
394e2e4c KF |
413 | stl_raw(&scsiconf->max_sectors, s->conf.max_sectors); |
414 | stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun); | |
973abc7f SH |
415 | stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent)); |
416 | stl_raw(&scsiconf->sense_size, s->sense_size); | |
417 | stl_raw(&scsiconf->cdb_size, s->cdb_size); | |
863d1050 DG |
418 | stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); |
419 | stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); | |
973abc7f SH |
420 | stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); |
421 | } | |
422 | ||
423 | static void virtio_scsi_set_config(VirtIODevice *vdev, | |
424 | const uint8_t *config) | |
425 | { | |
426 | VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; | |
292c8e50 | 427 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
973abc7f SH |
428 | |
429 | if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || | |
430 | (uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) { | |
431 | error_report("bad data written to virtio-scsi configuration space"); | |
432 | exit(1); | |
433 | } | |
434 | ||
292c8e50 PB |
435 | vs->sense_size = ldl_raw(&scsiconf->sense_size); |
436 | vs->cdb_size = ldl_raw(&scsiconf->cdb_size); | |
973abc7f SH |
437 | } |
438 | ||
439 | static uint32_t virtio_scsi_get_features(VirtIODevice *vdev, | |
440 | uint32_t requested_features) | |
441 | { | |
442 | return requested_features; | |
443 | } | |
444 | ||
445 | static void virtio_scsi_reset(VirtIODevice *vdev) | |
446 | { | |
292c8e50 PB |
447 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
448 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); | |
973abc7f | 449 | |
47a150a4 PB |
450 | s->resetting++; |
451 | qbus_reset_all(&s->bus.qbus); | |
452 | s->resetting--; | |
453 | ||
292c8e50 PB |
454 | vs->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
455 | vs->cdb_size = VIRTIO_SCSI_CDB_SIZE; | |
2baa1beb | 456 | s->events_dropped = false; |
973abc7f SH |
457 | } |
458 | ||
5db1764c PB |
459 | /* The device does not have anything to save beyond the virtio data. |
460 | * Request data is saved with callbacks from SCSI devices. | |
461 | */ | |
462 | static void virtio_scsi_save(QEMUFile *f, void *opaque) | |
463 | { | |
0ac8e139 KF |
464 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
465 | virtio_save(vdev, f); | |
5db1764c PB |
466 | } |
467 | ||
468 | static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) | |
469 | { | |
0ac8e139 | 470 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
2a633c46 OW |
471 | int ret; |
472 | ||
0ac8e139 | 473 | ret = virtio_load(vdev, f); |
2a633c46 OW |
474 | if (ret) { |
475 | return ret; | |
476 | } | |
5db1764c PB |
477 | return 0; |
478 | } | |
479 | ||
b6866fee CM |
480 | static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
481 | uint32_t event, uint32_t reason) | |
482 | { | |
292c8e50 PB |
483 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
484 | VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq); | |
b6866fee | 485 | VirtIOSCSIEvent *evt; |
0ac8e139 | 486 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
64f64855 | 487 | int in_size; |
b6866fee | 488 | |
0ac8e139 | 489 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
cd41a671 PB |
490 | return; |
491 | } | |
492 | ||
64f64855 PB |
493 | if (!req) { |
494 | s->events_dropped = true; | |
495 | return; | |
496 | } | |
b6866fee | 497 | |
64f64855 PB |
498 | if (req->elem.out_num || req->elem.in_num != 1) { |
499 | virtio_scsi_bad_req(); | |
500 | } | |
b6866fee | 501 | |
64f64855 PB |
502 | if (s->events_dropped) { |
503 | event |= VIRTIO_SCSI_T_EVENTS_MISSED; | |
504 | s->events_dropped = false; | |
505 | } | |
506 | ||
507 | in_size = req->elem.in_sg[0].iov_len; | |
508 | if (in_size < sizeof(VirtIOSCSIEvent)) { | |
509 | virtio_scsi_bad_req(); | |
510 | } | |
511 | ||
512 | evt = req->resp.event; | |
513 | memset(evt, 0, sizeof(VirtIOSCSIEvent)); | |
514 | evt->event = event; | |
515 | evt->reason = reason; | |
516 | if (!dev) { | |
517 | assert(event == VIRTIO_SCSI_T_NO_EVENT); | |
518 | } else { | |
b6866fee CM |
519 | evt->lun[0] = 1; |
520 | evt->lun[1] = dev->id; | |
521 | ||
522 | /* Linux wants us to keep the same encoding we use for REPORT LUNS. */ | |
523 | if (dev->lun >= 256) { | |
524 | evt->lun[2] = (dev->lun >> 8) | 0x40; | |
525 | } | |
526 | evt->lun[3] = dev->lun & 0xFF; | |
64f64855 PB |
527 | } |
528 | virtio_scsi_complete_req(req); | |
529 | } | |
530 | ||
531 | static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) | |
532 | { | |
0ac8e139 | 533 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
64f64855 PB |
534 | |
535 | if (s->events_dropped) { | |
536 | virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); | |
b6866fee CM |
537 | } |
538 | } | |
539 | ||
feda01e4 PB |
540 | static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
541 | { | |
542 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
0ac8e139 | 543 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
feda01e4 | 544 | |
0ac8e139 | 545 | if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) && |
feda01e4 PB |
546 | dev->type != TYPE_ROM) { |
547 | virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, | |
548 | sense.asc | (sense.ascq << 8)); | |
549 | } | |
550 | } | |
551 | ||
b6866fee CM |
552 | static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev) |
553 | { | |
554 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
0ac8e139 | 555 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
b6866fee | 556 | |
0ac8e139 | 557 | if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
b6866fee CM |
558 | virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
559 | VIRTIO_SCSI_EVT_RESET_RESCAN); | |
560 | } | |
561 | } | |
562 | ||
563 | static void virtio_scsi_hot_unplug(SCSIBus *bus, SCSIDevice *dev) | |
564 | { | |
565 | VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); | |
0ac8e139 | 566 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
b6866fee | 567 | |
0ac8e139 | 568 | if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
b6866fee CM |
569 | virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
570 | VIRTIO_SCSI_EVT_RESET_REMOVED); | |
571 | } | |
572 | } | |
573 | ||
2ccdcd8d PB |
574 | static struct SCSIBusInfo virtio_scsi_scsi_info = { |
575 | .tcq = true, | |
576 | .max_channel = VIRTIO_SCSI_MAX_CHANNEL, | |
577 | .max_target = VIRTIO_SCSI_MAX_TARGET, | |
578 | .max_lun = VIRTIO_SCSI_MAX_LUN, | |
579 | ||
580 | .complete = virtio_scsi_command_complete, | |
581 | .cancel = virtio_scsi_request_cancelled, | |
feda01e4 | 582 | .change = virtio_scsi_change, |
b6866fee CM |
583 | .hotplug = virtio_scsi_hotplug, |
584 | .hot_unplug = virtio_scsi_hot_unplug, | |
2ccdcd8d | 585 | .get_sg_list = virtio_scsi_get_sg_list, |
5db1764c PB |
586 | .save_request = virtio_scsi_save_request, |
587 | .load_request = virtio_scsi_load_request, | |
2ccdcd8d PB |
588 | }; |
589 | ||
292c8e50 | 590 | int virtio_scsi_common_init(VirtIOSCSICommon *s) |
973abc7f | 591 | { |
292c8e50 | 592 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
d2ad7dd4 | 593 | int i; |
973abc7f | 594 | |
763684be KF |
595 | virtio_init(VIRTIO_DEVICE(s), "virtio-scsi", VIRTIO_ID_SCSI, |
596 | sizeof(VirtIOSCSIConfig)); | |
3ab1dfdd | 597 | |
763684be | 598 | s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *)); |
292c8e50 PB |
599 | s->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
600 | s->cdb_size = VIRTIO_SCSI_CDB_SIZE; | |
3ab1dfdd | 601 | |
0ac8e139 | 602 | vdev->get_config = virtio_scsi_get_config; |
0ac8e139 KF |
603 | |
604 | s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, | |
605 | virtio_scsi_handle_ctrl); | |
606 | s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, | |
619d7ae9 | 607 | virtio_scsi_handle_event); |
394e2e4c | 608 | for (i = 0; i < s->conf.num_queues; i++) { |
0ac8e139 | 609 | s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
d2ad7dd4 PB |
610 | virtio_scsi_handle_cmd); |
611 | } | |
973abc7f | 612 | |
292c8e50 PB |
613 | return 0; |
614 | } | |
615 | ||
616 | static int virtio_scsi_device_init(VirtIODevice *vdev) | |
617 | { | |
618 | DeviceState *qdev = DEVICE(vdev); | |
619 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); | |
620 | VirtIOSCSI *s = VIRTIO_SCSI(vdev); | |
621 | static int virtio_scsi_id; | |
622 | int ret; | |
623 | ||
624 | ret = virtio_scsi_common_init(vs); | |
625 | if (ret < 0) { | |
626 | return ret; | |
627 | } | |
628 | ||
629 | vdev->get_features = virtio_scsi_get_features; | |
630 | vdev->set_config = virtio_scsi_set_config; | |
631 | vdev->reset = virtio_scsi_reset; | |
632 | ||
763684be KF |
633 | scsi_bus_new(&s->bus, qdev, &virtio_scsi_scsi_info); |
634 | if (!qdev->hotplugged) { | |
2ccdcd8d PB |
635 | scsi_bus_legacy_handle_cmdline(&s->bus); |
636 | } | |
637 | ||
763684be | 638 | register_savevm(qdev, "virtio-scsi", virtio_scsi_id++, 1, |
5db1764c | 639 | virtio_scsi_save, virtio_scsi_load, s); |
973abc7f | 640 | |
3ab1dfdd KF |
641 | return 0; |
642 | } | |
643 | ||
292c8e50 PB |
644 | int virtio_scsi_common_exit(VirtIOSCSICommon *vs) |
645 | { | |
646 | VirtIODevice *vdev = VIRTIO_DEVICE(vs); | |
647 | ||
648 | g_free(vs->cmd_vqs); | |
649 | virtio_common_cleanup(vdev); | |
650 | return 0; | |
651 | } | |
652 | ||
3ab1dfdd KF |
653 | static int virtio_scsi_device_exit(DeviceState *qdev) |
654 | { | |
655 | VirtIOSCSI *s = VIRTIO_SCSI(qdev); | |
292c8e50 | 656 | VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(qdev); |
3ab1dfdd KF |
657 | |
658 | unregister_savevm(qdev, "virtio-scsi", s); | |
292c8e50 | 659 | return virtio_scsi_common_exit(vs); |
3ab1dfdd KF |
660 | } |
661 | ||
662 | static Property virtio_scsi_properties[] = { | |
292c8e50 | 663 | DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf), |
3ab1dfdd KF |
664 | DEFINE_PROP_END_OF_LIST(), |
665 | }; | |
666 | ||
292c8e50 PB |
667 | static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
668 | { | |
669 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
670 | ||
671 | vdc->get_config = virtio_scsi_get_config; | |
672 | } | |
673 | ||
3ab1dfdd KF |
674 | static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
675 | { | |
676 | DeviceClass *dc = DEVICE_CLASS(klass); | |
677 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
678 | dc->exit = virtio_scsi_device_exit; | |
679 | dc->props = virtio_scsi_properties; | |
680 | vdc->init = virtio_scsi_device_init; | |
3ab1dfdd KF |
681 | vdc->set_config = virtio_scsi_set_config; |
682 | vdc->get_features = virtio_scsi_get_features; | |
683 | vdc->reset = virtio_scsi_reset; | |
684 | } | |
685 | ||
292c8e50 PB |
686 | static const TypeInfo virtio_scsi_common_info = { |
687 | .name = TYPE_VIRTIO_SCSI_COMMON, | |
688 | .parent = TYPE_VIRTIO_DEVICE, | |
689 | .instance_size = sizeof(VirtIOSCSICommon), | |
690 | .class_init = virtio_scsi_common_class_init, | |
691 | }; | |
692 | ||
3ab1dfdd KF |
693 | static const TypeInfo virtio_scsi_info = { |
694 | .name = TYPE_VIRTIO_SCSI, | |
292c8e50 | 695 | .parent = TYPE_VIRTIO_SCSI_COMMON, |
3ab1dfdd KF |
696 | .instance_size = sizeof(VirtIOSCSI), |
697 | .class_init = virtio_scsi_class_init, | |
698 | }; | |
699 | ||
700 | static void virtio_register_types(void) | |
701 | { | |
292c8e50 | 702 | type_register_static(&virtio_scsi_common_info); |
3ab1dfdd KF |
703 | type_register_static(&virtio_scsi_info); |
704 | } | |
705 | ||
706 | type_init(virtio_register_types) |