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virtio-gpu: no point of checking res->iov
[qemu/ar7.git] / hw / display / virtio-gpu.c
blob72da5bf5002c96403a48e80fe517a71b2916c931
1 /*
2 * Virtio GPU Device
3 *
4 * Copyright Red Hat, Inc. 2013-2014
5 *
6 * Authors:
7 * Dave Airlie <airlied@redhat.com>
8 * Gerd Hoffmann <kraxel@redhat.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
12 */
13
14 #include "qemu/osdep.h"
15 #include "qemu/units.h"
16 #include "qemu/iov.h"
17 #include "ui/console.h"
18 #include "trace.h"
19 #include "sysemu/dma.h"
20 #include "sysemu/sysemu.h"
21 #include "hw/virtio/virtio.h"
22 #include "migration/qemu-file-types.h"
23 #include "hw/virtio/virtio-gpu.h"
24 #include "hw/virtio/virtio-gpu-bswap.h"
25 #include "hw/virtio/virtio-gpu-pixman.h"
26 #include "hw/virtio/virtio-bus.h"
27 #include "hw/display/edid.h"
28 #include "hw/qdev-properties.h"
29 #include "qemu/log.h"
30 #include "qemu/module.h"
31 #include "qapi/error.h"
32 #include "qemu/error-report.h"
33
34 #define VIRTIO_GPU_VM_VERSION 1
35
36 static struct virtio_gpu_simple_resource*
37 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
38 static struct virtio_gpu_simple_resource *
39 virtio_gpu_find_check_resource(VirtIOGPU *g, uint32_t resource_id,
40 bool require_backing,
41 const char *caller, uint32_t *error);
42
43 static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
44 struct virtio_gpu_simple_resource *res);
45
46 void virtio_gpu_update_cursor_data(VirtIOGPU *g,
47 struct virtio_gpu_scanout *s,
48 uint32_t resource_id)
49 {
50 struct virtio_gpu_simple_resource *res;
51 uint32_t pixels;
52 void *data;
53
54 res = virtio_gpu_find_check_resource(g, resource_id, false,
55 __func__, NULL);
56 if (!res) {
57 return;
58 }
59
60 if (res->blob_size) {
61 if (res->blob_size < (s->current_cursor->width *
62 s->current_cursor->height * 4)) {
63 return;
64 }
65 data = res->blob;
66 } else {
67 if (pixman_image_get_width(res->image) != s->current_cursor->width ||
68 pixman_image_get_height(res->image) != s->current_cursor->height) {
69 return;
70 }
71 data = pixman_image_get_data(res->image);
72 }
73
74 pixels = s->current_cursor->width * s->current_cursor->height;
75 memcpy(s->current_cursor->data, data,
76 pixels * sizeof(uint32_t));
77 }
78
79 static void update_cursor(VirtIOGPU *g, struct virtio_gpu_update_cursor *cursor)
80 {
81 struct virtio_gpu_scanout *s;
82 VirtIOGPUClass *vgc = VIRTIO_GPU_GET_CLASS(g);
83 bool move = cursor->hdr.type == VIRTIO_GPU_CMD_MOVE_CURSOR;
84
85 if (cursor->pos.scanout_id >= g->parent_obj.conf.max_outputs) {
86 return;
87 }
88 s = &g->parent_obj.scanout[cursor->pos.scanout_id];
89
90 trace_virtio_gpu_update_cursor(cursor->pos.scanout_id,
91 cursor->pos.x,
92 cursor->pos.y,
93 move ? "move" : "update",
94 cursor->resource_id);
95
96 if (!move) {
97 if (!s->current_cursor) {
98 s->current_cursor = cursor_alloc(64, 64);
99 }
100
101 s->current_cursor->hot_x = cursor->hot_x;
102 s->current_cursor->hot_y = cursor->hot_y;
103
104 if (cursor->resource_id > 0) {
105 vgc->update_cursor_data(g, s, cursor->resource_id);
106 }
107 dpy_cursor_define(s->con, s->current_cursor);
108
109 s->cursor = *cursor;
110 } else {
111 s->cursor.pos.x = cursor->pos.x;
112 s->cursor.pos.y = cursor->pos.y;
113 }
114 dpy_mouse_set(s->con, cursor->pos.x, cursor->pos.y,
115 cursor->resource_id ? 1 : 0);
116 }
117
118 static struct virtio_gpu_simple_resource *
119 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id)
120 {
121 struct virtio_gpu_simple_resource *res;
122
123 QTAILQ_FOREACH(res, &g->reslist, next) {
124 if (res->resource_id == resource_id) {
125 return res;
126 }
127 }
128 return NULL;
129 }
130
131 static struct virtio_gpu_simple_resource *
132 virtio_gpu_find_check_resource(VirtIOGPU *g, uint32_t resource_id,
133 bool require_backing,
134 const char *caller, uint32_t *error)
135 {
136 struct virtio_gpu_simple_resource *res;
137
138 res = virtio_gpu_find_resource(g, resource_id);
139 if (!res) {
140 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid resource specified %d\n",
141 caller, resource_id);
142 if (error) {
143 *error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
144 }
145 return NULL;
146 }
147
148 if (require_backing) {
149 if (!res->iov || (!res->image && !res->blob)) {
150 qemu_log_mask(LOG_GUEST_ERROR, "%s: no backing storage %d\n",
151 caller, resource_id);
152 if (error) {
153 *error = VIRTIO_GPU_RESP_ERR_UNSPEC;
154 }
155 return NULL;
156 }
157 }
158
159 return res;
160 }
161
162 void virtio_gpu_ctrl_response(VirtIOGPU *g,
163 struct virtio_gpu_ctrl_command *cmd,
164 struct virtio_gpu_ctrl_hdr *resp,
165 size_t resp_len)
166 {
167 size_t s;
168
169 if (cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE) {
170 resp->flags |= VIRTIO_GPU_FLAG_FENCE;
171 resp->fence_id = cmd->cmd_hdr.fence_id;
172 resp->ctx_id = cmd->cmd_hdr.ctx_id;
173 }
174 virtio_gpu_ctrl_hdr_bswap(resp);
175 s = iov_from_buf(cmd->elem.in_sg, cmd->elem.in_num, 0, resp, resp_len);
176 if (s != resp_len) {
177 qemu_log_mask(LOG_GUEST_ERROR,
178 "%s: response size incorrect %zu vs %zu\n",
179 __func__, s, resp_len);
180 }
181 virtqueue_push(cmd->vq, &cmd->elem, s);
182 virtio_notify(VIRTIO_DEVICE(g), cmd->vq);
183 cmd->finished = true;
184 }
185
186 void virtio_gpu_ctrl_response_nodata(VirtIOGPU *g,
187 struct virtio_gpu_ctrl_command *cmd,
188 enum virtio_gpu_ctrl_type type)
189 {
190 struct virtio_gpu_ctrl_hdr resp;
191
192 memset(&resp, 0, sizeof(resp));
193 resp.type = type;
194 virtio_gpu_ctrl_response(g, cmd, &resp, sizeof(resp));
195 }
196
197 void virtio_gpu_get_display_info(VirtIOGPU *g,
198 struct virtio_gpu_ctrl_command *cmd)
199 {
200 struct virtio_gpu_resp_display_info display_info;
201
202 trace_virtio_gpu_cmd_get_display_info();
203 memset(&display_info, 0, sizeof(display_info));
204 display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
205 virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
206 virtio_gpu_ctrl_response(g, cmd, &display_info.hdr,
207 sizeof(display_info));
208 }
209
210 static void
211 virtio_gpu_generate_edid(VirtIOGPU *g, int scanout,
212 struct virtio_gpu_resp_edid *edid)
213 {
214 VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
215 qemu_edid_info info = {
216 .width_mm = b->req_state[scanout].width_mm,
217 .height_mm = b->req_state[scanout].height_mm,
218 .prefx = b->req_state[scanout].width,
219 .prefy = b->req_state[scanout].height,
220 };
221
222 edid->size = cpu_to_le32(sizeof(edid->edid));
223 qemu_edid_generate(edid->edid, sizeof(edid->edid), &info);
224 }
225
226 void virtio_gpu_get_edid(VirtIOGPU *g,
227 struct virtio_gpu_ctrl_command *cmd)
228 {
229 struct virtio_gpu_resp_edid edid;
230 struct virtio_gpu_cmd_get_edid get_edid;
231 VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
232
233 VIRTIO_GPU_FILL_CMD(get_edid);
234 virtio_gpu_bswap_32(&get_edid, sizeof(get_edid));
235
236 if (get_edid.scanout >= b->conf.max_outputs) {
237 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
238 return;
239 }
240
241 trace_virtio_gpu_cmd_get_edid(get_edid.scanout);
242 memset(&edid, 0, sizeof(edid));
243 edid.hdr.type = VIRTIO_GPU_RESP_OK_EDID;
244 virtio_gpu_generate_edid(g, get_edid.scanout, &edid);
245 virtio_gpu_ctrl_response(g, cmd, &edid.hdr, sizeof(edid));
246 }
247
248 static uint32_t calc_image_hostmem(pixman_format_code_t pformat,
249 uint32_t width, uint32_t height)
250 {
251 /* Copied from pixman/pixman-bits-image.c, skip integer overflow check.
252 * pixman_image_create_bits will fail in case it overflow.
253 */
254
255 int bpp = PIXMAN_FORMAT_BPP(pformat);
256 int stride = ((width * bpp + 0x1f) >> 5) * sizeof(uint32_t);
257 return height * stride;
258 }
259
260 static void virtio_gpu_resource_create_2d(VirtIOGPU *g,
261 struct virtio_gpu_ctrl_command *cmd)
262 {
263 pixman_format_code_t pformat;
264 struct virtio_gpu_simple_resource *res;
265 struct virtio_gpu_resource_create_2d c2d;
266
267 VIRTIO_GPU_FILL_CMD(c2d);
268 virtio_gpu_bswap_32(&c2d, sizeof(c2d));
269 trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
270 c2d.width, c2d.height);
271
272 if (c2d.resource_id == 0) {
273 qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
274 __func__);
275 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
276 return;
277 }
278
279 res = virtio_gpu_find_resource(g, c2d.resource_id);
280 if (res) {
281 qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
282 __func__, c2d.resource_id);
283 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
284 return;
285 }
286
287 res = g_new0(struct virtio_gpu_simple_resource, 1);
288
289 res->width = c2d.width;
290 res->height = c2d.height;
291 res->format = c2d.format;
292 res->resource_id = c2d.resource_id;
293
294 pformat = virtio_gpu_get_pixman_format(c2d.format);
295 if (!pformat) {
296 qemu_log_mask(LOG_GUEST_ERROR,
297 "%s: host couldn't handle guest format %d\n",
298 __func__, c2d.format);
299 g_free(res);
300 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
301 return;
302 }
303
304 res->hostmem = calc_image_hostmem(pformat, c2d.width, c2d.height);
305 if (res->hostmem + g->hostmem < g->conf_max_hostmem) {
306 res->image = pixman_image_create_bits(pformat,
307 c2d.width,
308 c2d.height,
309 NULL, 0);
310 }
311
312 if (!res->image) {
313 qemu_log_mask(LOG_GUEST_ERROR,
314 "%s: resource creation failed %d %d %d\n",
315 __func__, c2d.resource_id, c2d.width, c2d.height);
316 g_free(res);
317 cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
318 return;
319 }
320
321 QTAILQ_INSERT_HEAD(&g->reslist, res, next);
322 g->hostmem += res->hostmem;
323 }
324
325 static void virtio_gpu_resource_create_blob(VirtIOGPU *g,
326 struct virtio_gpu_ctrl_command *cmd)
327 {
328 struct virtio_gpu_simple_resource *res;
329 struct virtio_gpu_resource_create_blob cblob;
330 int ret;
331
332 VIRTIO_GPU_FILL_CMD(cblob);
333 virtio_gpu_create_blob_bswap(&cblob);
334 trace_virtio_gpu_cmd_res_create_blob(cblob.resource_id, cblob.size);
335
336 if (cblob.resource_id == 0) {
337 qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
338 __func__);
339 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
340 return;
341 }
342
343 if (cblob.blob_mem != VIRTIO_GPU_BLOB_MEM_GUEST &&
344 cblob.blob_flags != VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE) {
345 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid memory type\n",
346 __func__);
347 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
348 return;
349 }
350
351 if (virtio_gpu_find_resource(g, cblob.resource_id)) {
352 qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
353 __func__, cblob.resource_id);
354 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
355 return;
356 }
357
358 res = g_new0(struct virtio_gpu_simple_resource, 1);
359 res->resource_id = cblob.resource_id;
360 res->blob_size = cblob.size;
361
362 ret = virtio_gpu_create_mapping_iov(g, cblob.nr_entries, sizeof(cblob),
363 cmd, &res->addrs, &res->iov,
364 &res->iov_cnt);
365 if (ret != 0) {
366 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
367 g_free(res);
368 return;
369 }
370
371 virtio_gpu_init_udmabuf(res);
372 QTAILQ_INSERT_HEAD(&g->reslist, res, next);
373 }
374
375 static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id)
376 {
377 struct virtio_gpu_scanout *scanout = &g->parent_obj.scanout[scanout_id];
378 struct virtio_gpu_simple_resource *res;
379
380 if (scanout->resource_id == 0) {
381 return;
382 }
383
384 res = virtio_gpu_find_resource(g, scanout->resource_id);
385 if (res) {
386 res->scanout_bitmask &= ~(1 << scanout_id);
387 }
388
389 dpy_gfx_replace_surface(scanout->con, NULL);
390 scanout->resource_id = 0;
391 scanout->ds = NULL;
392 scanout->width = 0;
393 scanout->height = 0;
394 }
395
396 static void virtio_gpu_resource_destroy(VirtIOGPU *g,
397 struct virtio_gpu_simple_resource *res)
398 {
399 int i;
400
401 if (res->scanout_bitmask) {
402 for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
403 if (res->scanout_bitmask & (1 << i)) {
404 virtio_gpu_disable_scanout(g, i);
405 }
406 }
407 }
408
409 qemu_pixman_image_unref(res->image);
410 virtio_gpu_cleanup_mapping(g, res);
411 QTAILQ_REMOVE(&g->reslist, res, next);
412 g->hostmem -= res->hostmem;
413 g_free(res);
414 }
415
416 static void virtio_gpu_resource_unref(VirtIOGPU *g,
417 struct virtio_gpu_ctrl_command *cmd)
418 {
419 struct virtio_gpu_simple_resource *res;
420 struct virtio_gpu_resource_unref unref;
421
422 VIRTIO_GPU_FILL_CMD(unref);
423 virtio_gpu_bswap_32(&unref, sizeof(unref));
424 trace_virtio_gpu_cmd_res_unref(unref.resource_id);
425
426 res = virtio_gpu_find_resource(g, unref.resource_id);
427 if (!res) {
428 qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
429 __func__, unref.resource_id);
430 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
431 return;
432 }
433 virtio_gpu_resource_destroy(g, res);
434 }
435
436 static void virtio_gpu_transfer_to_host_2d(VirtIOGPU *g,
437 struct virtio_gpu_ctrl_command *cmd)
438 {
439 struct virtio_gpu_simple_resource *res;
440 int h;
441 uint32_t src_offset, dst_offset, stride;
442 int bpp;
443 pixman_format_code_t format;
444 struct virtio_gpu_transfer_to_host_2d t2d;
445
446 VIRTIO_GPU_FILL_CMD(t2d);
447 virtio_gpu_t2d_bswap(&t2d);
448 trace_virtio_gpu_cmd_res_xfer_toh_2d(t2d.resource_id);
449
450 res = virtio_gpu_find_check_resource(g, t2d.resource_id, true,
451 __func__, &cmd->error);
452 if (!res || res->blob) {
453 return;
454 }
455
456 if (t2d.r.x > res->width ||
457 t2d.r.y > res->height ||
458 t2d.r.width > res->width ||
459 t2d.r.height > res->height ||
460 t2d.r.x + t2d.r.width > res->width ||
461 t2d.r.y + t2d.r.height > res->height) {
462 qemu_log_mask(LOG_GUEST_ERROR, "%s: transfer bounds outside resource"
463 " bounds for resource %d: %d %d %d %d vs %d %d\n",
464 __func__, t2d.resource_id, t2d.r.x, t2d.r.y,
465 t2d.r.width, t2d.r.height, res->width, res->height);
466 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
467 return;
468 }
469
470 format = pixman_image_get_format(res->image);
471 bpp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
472 stride = pixman_image_get_stride(res->image);
473
474 if (t2d.offset || t2d.r.x || t2d.r.y ||
475 t2d.r.width != pixman_image_get_width(res->image)) {
476 void *img_data = pixman_image_get_data(res->image);
477 for (h = 0; h < t2d.r.height; h++) {
478 src_offset = t2d.offset + stride * h;
479 dst_offset = (t2d.r.y + h) * stride + (t2d.r.x * bpp);
480
481 iov_to_buf(res->iov, res->iov_cnt, src_offset,
482 (uint8_t *)img_data
483 + dst_offset, t2d.r.width * bpp);
484 }
485 } else {
486 iov_to_buf(res->iov, res->iov_cnt, 0,
487 pixman_image_get_data(res->image),
488 pixman_image_get_stride(res->image)
489 * pixman_image_get_height(res->image));
490 }
491 }
492
493 static void virtio_gpu_resource_flush(VirtIOGPU *g,
494 struct virtio_gpu_ctrl_command *cmd)
495 {
496 struct virtio_gpu_simple_resource *res;
497 struct virtio_gpu_resource_flush rf;
498 struct virtio_gpu_scanout *scanout;
499 pixman_region16_t flush_region;
500 int i;
501
502 VIRTIO_GPU_FILL_CMD(rf);
503 virtio_gpu_bswap_32(&rf, sizeof(rf));
504 trace_virtio_gpu_cmd_res_flush(rf.resource_id,
505 rf.r.width, rf.r.height, rf.r.x, rf.r.y);
506
507 res = virtio_gpu_find_check_resource(g, rf.resource_id, false,
508 __func__, &cmd->error);
509 if (!res) {
510 return;
511 }
512
513 if (res->blob) {
514 for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
515 scanout = &g->parent_obj.scanout[i];
516 if (scanout->resource_id == res->resource_id &&
517 console_has_gl(scanout->con)) {
518 dpy_gl_update(scanout->con, 0, 0, scanout->width,
519 scanout->height);
520 return;
521 }
522 }
523 }
524
525 if (!res->blob &&
526 (rf.r.x > res->width ||
527 rf.r.y > res->height ||
528 rf.r.width > res->width ||
529 rf.r.height > res->height ||
530 rf.r.x + rf.r.width > res->width ||
531 rf.r.y + rf.r.height > res->height)) {
532 qemu_log_mask(LOG_GUEST_ERROR, "%s: flush bounds outside resource"
533 " bounds for resource %d: %d %d %d %d vs %d %d\n",
534 __func__, rf.resource_id, rf.r.x, rf.r.y,
535 rf.r.width, rf.r.height, res->width, res->height);
536 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
537 return;
538 }
539
540 pixman_region_init_rect(&flush_region,
541 rf.r.x, rf.r.y, rf.r.width, rf.r.height);
542 for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
543 pixman_region16_t region, finalregion;
544 pixman_box16_t *extents;
545
546 if (!(res->scanout_bitmask & (1 << i))) {
547 continue;
548 }
549 scanout = &g->parent_obj.scanout[i];
550
551 pixman_region_init(&finalregion);
552 pixman_region_init_rect(&region, scanout->x, scanout->y,
553 scanout->width, scanout->height);
554
555 pixman_region_intersect(&finalregion, &flush_region, &region);
556 pixman_region_translate(&finalregion, -scanout->x, -scanout->y);
557 extents = pixman_region_extents(&finalregion);
558 /* work out the area we need to update for each console */
559 dpy_gfx_update(g->parent_obj.scanout[i].con,
560 extents->x1, extents->y1,
561 extents->x2 - extents->x1,
562 extents->y2 - extents->y1);
563
564 pixman_region_fini(&region);
565 pixman_region_fini(&finalregion);
566 }
567 pixman_region_fini(&flush_region);
568 }
569
570 static void virtio_unref_resource(pixman_image_t *image, void *data)
571 {
572 pixman_image_unref(data);
573 }
574
575 static void virtio_gpu_update_scanout(VirtIOGPU *g,
576 uint32_t scanout_id,
577 struct virtio_gpu_simple_resource *res,
578 struct virtio_gpu_rect *r)
579 {
580 struct virtio_gpu_simple_resource *ores;
581 struct virtio_gpu_scanout *scanout;
582
583 scanout = &g->parent_obj.scanout[scanout_id];
584 ores = virtio_gpu_find_resource(g, scanout->resource_id);
585 if (ores) {
586 ores->scanout_bitmask &= ~(1 << scanout_id);
587 }
588
589 res->scanout_bitmask |= (1 << scanout_id);
590 scanout->resource_id = res->resource_id;
591 scanout->x = r->x;
592 scanout->y = r->y;
593 scanout->width = r->width;
594 scanout->height = r->height;
595 }
596
597 static void virtio_gpu_do_set_scanout(VirtIOGPU *g,
598 uint32_t scanout_id,
599 struct virtio_gpu_framebuffer *fb,
600 struct virtio_gpu_simple_resource *res,
601 struct virtio_gpu_rect *r,
602 uint32_t *error)
603 {
604 struct virtio_gpu_scanout *scanout;
605 uint8_t *data;
606
607 scanout = &g->parent_obj.scanout[scanout_id];
608
609 if (r->x > fb->width ||
610 r->y > fb->height ||
611 r->width < 16 ||
612 r->height < 16 ||
613 r->width > fb->width ||
614 r->height > fb->height ||
615 r->x + r->width > fb->width ||
616 r->y + r->height > fb->height) {
617 qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout %d bounds for"
618 " resource %d, rect (%d,%d)+%d,%d, fb %d %d\n",
619 __func__, scanout_id, res->resource_id,
620 r->x, r->y, r->width, r->height,
621 fb->width, fb->height);
622 *error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
623 return;
624 }
625
626 g->parent_obj.enable = 1;
627
628 if (res->blob) {
629 if (console_has_gl(scanout->con)) {
630 if (!virtio_gpu_update_dmabuf(g, scanout_id, res, fb)) {
631 virtio_gpu_update_scanout(g, scanout_id, res, r);
632 return;
633 }
634 }
635
636 data = res->blob;
637 } else {
638 data = (uint8_t *)pixman_image_get_data(res->image);
639 }
640
641 /* create a surface for this scanout */
642 if ((res->blob && !console_has_gl(scanout->con)) ||
643 !scanout->ds ||
644 surface_data(scanout->ds) != data + fb->offset ||
645 scanout->width != r->width ||
646 scanout->height != r->height) {
647 pixman_image_t *rect;
648 void *ptr = data + fb->offset;
649 rect = pixman_image_create_bits(fb->format, r->width, r->height,
650 ptr, fb->stride);
651
652 if (res->image) {
653 pixman_image_ref(res->image);
654 pixman_image_set_destroy_function(rect, virtio_unref_resource,
655 res->image);
656 }
657
658 /* realloc the surface ptr */
659 scanout->ds = qemu_create_displaysurface_pixman(rect);
660 if (!scanout->ds) {
661 *error = VIRTIO_GPU_RESP_ERR_UNSPEC;
662 return;
663 }
664
665 pixman_image_unref(rect);
666 dpy_gfx_replace_surface(g->parent_obj.scanout[scanout_id].con,
667 scanout->ds);
668 }
669
670 virtio_gpu_update_scanout(g, scanout_id, res, r);
671 }
672
673 static void virtio_gpu_set_scanout(VirtIOGPU *g,
674 struct virtio_gpu_ctrl_command *cmd)
675 {
676 struct virtio_gpu_simple_resource *res;
677 struct virtio_gpu_framebuffer fb = { 0 };
678 struct virtio_gpu_set_scanout ss;
679
680 VIRTIO_GPU_FILL_CMD(ss);
681 virtio_gpu_bswap_32(&ss, sizeof(ss));
682 trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
683 ss.r.width, ss.r.height, ss.r.x, ss.r.y);
684
685 if (ss.scanout_id >= g->parent_obj.conf.max_outputs) {
686 qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
687 __func__, ss.scanout_id);
688 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
689 return;
690 }
691
692 if (ss.resource_id == 0) {
693 virtio_gpu_disable_scanout(g, ss.scanout_id);
694 return;
695 }
696
697 res = virtio_gpu_find_check_resource(g, ss.resource_id, true,
698 __func__, &cmd->error);
699 if (!res) {
700 return;
701 }
702
703 fb.format = pixman_image_get_format(res->image);
704 fb.bytes_pp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(fb.format), 8);
705 fb.width = pixman_image_get_width(res->image);
706 fb.height = pixman_image_get_height(res->image);
707 fb.stride = pixman_image_get_stride(res->image);
708 fb.offset = ss.r.x * fb.bytes_pp + ss.r.y * fb.stride;
709
710 virtio_gpu_do_set_scanout(g, ss.scanout_id,
711 &fb, res, &ss.r, &cmd->error);
712 }
713
714 static void virtio_gpu_set_scanout_blob(VirtIOGPU *g,
715 struct virtio_gpu_ctrl_command *cmd)
716 {
717 struct virtio_gpu_simple_resource *res;
718 struct virtio_gpu_framebuffer fb = { 0 };
719 struct virtio_gpu_set_scanout_blob ss;
720 uint64_t fbend;
721
722 VIRTIO_GPU_FILL_CMD(ss);
723 virtio_gpu_scanout_blob_bswap(&ss);
724 trace_virtio_gpu_cmd_set_scanout_blob(ss.scanout_id, ss.resource_id,
725 ss.r.width, ss.r.height, ss.r.x,
726 ss.r.y);
727
728 if (ss.scanout_id >= g->parent_obj.conf.max_outputs) {
729 qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
730 __func__, ss.scanout_id);
731 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
732 return;
733 }
734
735 if (ss.resource_id == 0) {
736 virtio_gpu_disable_scanout(g, ss.scanout_id);
737 return;
738 }
739
740 res = virtio_gpu_find_check_resource(g, ss.resource_id, true,
741 __func__, &cmd->error);
742 if (!res) {
743 return;
744 }
745
746 fb.format = virtio_gpu_get_pixman_format(ss.format);
747 if (!fb.format) {
748 qemu_log_mask(LOG_GUEST_ERROR,
749 "%s: host couldn't handle guest format %d\n",
750 __func__, ss.format);
751 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
752 return;
753 }
754
755 fb.bytes_pp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(fb.format), 8);
756 fb.width = ss.width;
757 fb.height = ss.height;
758 fb.stride = ss.strides[0];
759 fb.offset = ss.offsets[0] + ss.r.x * fb.bytes_pp + ss.r.y * fb.stride;
760
761 fbend = fb.offset;
762 fbend += fb.stride * (ss.r.height - 1);
763 fbend += fb.bytes_pp * ss.r.width;
764 if (fbend > res->blob_size) {
765 qemu_log_mask(LOG_GUEST_ERROR,
766 "%s: fb end out of range\n",
767 __func__);
768 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
769 return;
770 }
771
772 virtio_gpu_do_set_scanout(g, ss.scanout_id,
773 &fb, res, &ss.r, &cmd->error);
774 }
775
776 int virtio_gpu_create_mapping_iov(VirtIOGPU *g,
777 uint32_t nr_entries, uint32_t offset,
778 struct virtio_gpu_ctrl_command *cmd,
779 uint64_t **addr, struct iovec **iov,
780 uint32_t *niov)
781 {
782 struct virtio_gpu_mem_entry *ents;
783 size_t esize, s;
784 int e, v;
785
786 if (nr_entries > 16384) {
787 qemu_log_mask(LOG_GUEST_ERROR,
788 "%s: nr_entries is too big (%d > 16384)\n",
789 __func__, nr_entries);
790 return -1;
791 }
792
793 esize = sizeof(*ents) * nr_entries;
794 ents = g_malloc(esize);
795 s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
796 offset, ents, esize);
797 if (s != esize) {
798 qemu_log_mask(LOG_GUEST_ERROR,
799 "%s: command data size incorrect %zu vs %zu\n",
800 __func__, s, esize);
801 g_free(ents);
802 return -1;
803 }
804
805 *iov = NULL;
806 if (addr) {
807 *addr = NULL;
808 }
809 for (e = 0, v = 0; e < nr_entries; e++) {
810 uint64_t a = le64_to_cpu(ents[e].addr);
811 uint32_t l = le32_to_cpu(ents[e].length);
812 hwaddr len;
813 void *map;
814
815 do {
816 len = l;
817 map = dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
818 a, &len, DMA_DIRECTION_TO_DEVICE);
819 if (!map) {
820 qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to map MMIO memory for"
821 " element %d\n", __func__, e);
822 virtio_gpu_cleanup_mapping_iov(g, *iov, v);
823 g_free(ents);
824 *iov = NULL;
825 if (addr) {
826 g_free(*addr);
827 *addr = NULL;
828 }
829 return -1;
830 }
831
832 if (!(v % 16)) {
833 *iov = g_realloc(*iov, sizeof(struct iovec) * (v + 16));
834 if (addr) {
835 *addr = g_realloc(*addr, sizeof(uint64_t) * (v + 16));
836 }
837 }
838 (*iov)[v].iov_base = map;
839 (*iov)[v].iov_len = len;
840 if (addr) {
841 (*addr)[v] = a;
842 }
843
844 a += len;
845 l -= len;
846 v += 1;
847 } while (l > 0);
848 }
849 *niov = v;
850
851 g_free(ents);
852 return 0;
853 }
854
855 void virtio_gpu_cleanup_mapping_iov(VirtIOGPU *g,
856 struct iovec *iov, uint32_t count)
857 {
858 int i;
859
860 for (i = 0; i < count; i++) {
861 dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
862 iov[i].iov_base, iov[i].iov_len,
863 DMA_DIRECTION_TO_DEVICE,
864 iov[i].iov_len);
865 }
866 g_free(iov);
867 }
868
869 static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
870 struct virtio_gpu_simple_resource *res)
871 {
872 virtio_gpu_cleanup_mapping_iov(g, res->iov, res->iov_cnt);
873 res->iov = NULL;
874 res->iov_cnt = 0;
875 g_free(res->addrs);
876 res->addrs = NULL;
877
878 if (res->blob) {
879 virtio_gpu_fini_udmabuf(res);
880 }
881 }
882
883 static void
884 virtio_gpu_resource_attach_backing(VirtIOGPU *g,
885 struct virtio_gpu_ctrl_command *cmd)
886 {
887 struct virtio_gpu_simple_resource *res;
888 struct virtio_gpu_resource_attach_backing ab;
889 int ret;
890
891 VIRTIO_GPU_FILL_CMD(ab);
892 virtio_gpu_bswap_32(&ab, sizeof(ab));
893 trace_virtio_gpu_cmd_res_back_attach(ab.resource_id);
894
895 res = virtio_gpu_find_resource(g, ab.resource_id);
896 if (!res) {
897 qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
898 __func__, ab.resource_id);
899 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
900 return;
901 }
902
903 if (res->iov) {
904 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
905 return;
906 }
907
908 ret = virtio_gpu_create_mapping_iov(g, ab.nr_entries, sizeof(ab), cmd,
909 &res->addrs, &res->iov, &res->iov_cnt);
910 if (ret != 0) {
911 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
912 return;
913 }
914 }
915
916 static void
917 virtio_gpu_resource_detach_backing(VirtIOGPU *g,
918 struct virtio_gpu_ctrl_command *cmd)
919 {
920 struct virtio_gpu_simple_resource *res;
921 struct virtio_gpu_resource_detach_backing detach;
922
923 VIRTIO_GPU_FILL_CMD(detach);
924 virtio_gpu_bswap_32(&detach, sizeof(detach));
925 trace_virtio_gpu_cmd_res_back_detach(detach.resource_id);
926
927 res = virtio_gpu_find_check_resource(g, detach.resource_id, true,
928 __func__, &cmd->error);
929 if (!res) {
930 return;
931 }
932 virtio_gpu_cleanup_mapping(g, res);
933 }
934
935 void virtio_gpu_simple_process_cmd(VirtIOGPU *g,
936 struct virtio_gpu_ctrl_command *cmd)
937 {
938 VIRTIO_GPU_FILL_CMD(cmd->cmd_hdr);
939 virtio_gpu_ctrl_hdr_bswap(&cmd->cmd_hdr);
940
941 switch (cmd->cmd_hdr.type) {
942 case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
943 virtio_gpu_get_display_info(g, cmd);
944 break;
945 case VIRTIO_GPU_CMD_GET_EDID:
946 virtio_gpu_get_edid(g, cmd);
947 break;
948 case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
949 virtio_gpu_resource_create_2d(g, cmd);
950 break;
951 case VIRTIO_GPU_CMD_RESOURCE_CREATE_BLOB:
952 if (!virtio_gpu_blob_enabled(g->parent_obj.conf)) {
953 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
954 break;
955 }
956 virtio_gpu_resource_create_blob(g, cmd);
957 break;
958 case VIRTIO_GPU_CMD_RESOURCE_UNREF:
959 virtio_gpu_resource_unref(g, cmd);
960 break;
961 case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
962 virtio_gpu_resource_flush(g, cmd);
963 break;
964 case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
965 virtio_gpu_transfer_to_host_2d(g, cmd);
966 break;
967 case VIRTIO_GPU_CMD_SET_SCANOUT:
968 virtio_gpu_set_scanout(g, cmd);
969 break;
970 case VIRTIO_GPU_CMD_SET_SCANOUT_BLOB:
971 if (!virtio_gpu_blob_enabled(g->parent_obj.conf)) {
972 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
973 break;
974 }
975 virtio_gpu_set_scanout_blob(g, cmd);
976 break;
977 case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
978 virtio_gpu_resource_attach_backing(g, cmd);
979 break;
980 case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
981 virtio_gpu_resource_detach_backing(g, cmd);
982 break;
983 default:
984 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
985 break;
986 }
987 if (!cmd->finished) {
988 virtio_gpu_ctrl_response_nodata(g, cmd, cmd->error ? cmd->error :
989 VIRTIO_GPU_RESP_OK_NODATA);
990 }
991 }
992
993 static void virtio_gpu_handle_ctrl_cb(VirtIODevice *vdev, VirtQueue *vq)
994 {
995 VirtIOGPU *g = VIRTIO_GPU(vdev);
996 qemu_bh_schedule(g->ctrl_bh);
997 }
998
999 static void virtio_gpu_handle_cursor_cb(VirtIODevice *vdev, VirtQueue *vq)
1000 {
1001 VirtIOGPU *g = VIRTIO_GPU(vdev);
1002 qemu_bh_schedule(g->cursor_bh);
1003 }
1004
1005 void virtio_gpu_process_cmdq(VirtIOGPU *g)
1006 {
1007 struct virtio_gpu_ctrl_command *cmd;
1008 VirtIOGPUClass *vgc = VIRTIO_GPU_GET_CLASS(g);
1009
1010 if (g->processing_cmdq) {
1011 return;
1012 }
1013 g->processing_cmdq = true;
1014 while (!QTAILQ_EMPTY(&g->cmdq)) {
1015 cmd = QTAILQ_FIRST(&g->cmdq);
1016
1017 if (g->parent_obj.renderer_blocked) {
1018 break;
1019 }
1020
1021 /* process command */
1022 vgc->process_cmd(g, cmd);
1023
1024 QTAILQ_REMOVE(&g->cmdq, cmd, next);
1025 if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
1026 g->stats.requests++;
1027 }
1028
1029 if (!cmd->finished) {
1030 QTAILQ_INSERT_TAIL(&g->fenceq, cmd, next);
1031 g->inflight++;
1032 if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
1033 if (g->stats.max_inflight < g->inflight) {
1034 g->stats.max_inflight = g->inflight;
1035 }
1036 fprintf(stderr, "inflight: %3d (+)\r", g->inflight);
1037 }
1038 } else {
1039 g_free(cmd);
1040 }
1041 }
1042 g->processing_cmdq = false;
1043 }
1044
1045 static void virtio_gpu_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
1046 {
1047 VirtIOGPU *g = VIRTIO_GPU(vdev);
1048 struct virtio_gpu_ctrl_command *cmd;
1049
1050 if (!virtio_queue_ready(vq)) {
1051 return;
1052 }
1053
1054 cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
1055 while (cmd) {
1056 cmd->vq = vq;
1057 cmd->error = 0;
1058 cmd->finished = false;
1059 QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
1060 cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
1061 }
1062
1063 virtio_gpu_process_cmdq(g);
1064 }
1065
1066 static void virtio_gpu_ctrl_bh(void *opaque)
1067 {
1068 VirtIOGPU *g = opaque;
1069 VirtIOGPUClass *vgc = VIRTIO_GPU_GET_CLASS(g);
1070
1071 vgc->handle_ctrl(&g->parent_obj.parent_obj, g->ctrl_vq);
1072 }
1073
1074 static void virtio_gpu_handle_cursor(VirtIODevice *vdev, VirtQueue *vq)
1075 {
1076 VirtIOGPU *g = VIRTIO_GPU(vdev);
1077 VirtQueueElement *elem;
1078 size_t s;
1079 struct virtio_gpu_update_cursor cursor_info;
1080
1081 if (!virtio_queue_ready(vq)) {
1082 return;
1083 }
1084 for (;;) {
1085 elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
1086 if (!elem) {
1087 break;
1088 }
1089
1090 s = iov_to_buf(elem->out_sg, elem->out_num, 0,
1091 &cursor_info, sizeof(cursor_info));
1092 if (s != sizeof(cursor_info)) {
1093 qemu_log_mask(LOG_GUEST_ERROR,
1094 "%s: cursor size incorrect %zu vs %zu\n",
1095 __func__, s, sizeof(cursor_info));
1096 } else {
1097 virtio_gpu_bswap_32(&cursor_info, sizeof(cursor_info));
1098 update_cursor(g, &cursor_info);
1099 }
1100 virtqueue_push(vq, elem, 0);
1101 virtio_notify(vdev, vq);
1102 g_free(elem);
1103 }
1104 }
1105
1106 static void virtio_gpu_cursor_bh(void *opaque)
1107 {
1108 VirtIOGPU *g = opaque;
1109 virtio_gpu_handle_cursor(&g->parent_obj.parent_obj, g->cursor_vq);
1110 }
1111
1112 static const VMStateDescription vmstate_virtio_gpu_scanout = {
1113 .name = "virtio-gpu-one-scanout",
1114 .version_id = 1,
1115 .fields = (VMStateField[]) {
1116 VMSTATE_UINT32(resource_id, struct virtio_gpu_scanout),
1117 VMSTATE_UINT32(width, struct virtio_gpu_scanout),
1118 VMSTATE_UINT32(height, struct virtio_gpu_scanout),
1119 VMSTATE_INT32(x, struct virtio_gpu_scanout),
1120 VMSTATE_INT32(y, struct virtio_gpu_scanout),
1121 VMSTATE_UINT32(cursor.resource_id, struct virtio_gpu_scanout),
1122 VMSTATE_UINT32(cursor.hot_x, struct virtio_gpu_scanout),
1123 VMSTATE_UINT32(cursor.hot_y, struct virtio_gpu_scanout),
1124 VMSTATE_UINT32(cursor.pos.x, struct virtio_gpu_scanout),
1125 VMSTATE_UINT32(cursor.pos.y, struct virtio_gpu_scanout),
1126 VMSTATE_END_OF_LIST()
1127 },
1128 };
1129
1130 static const VMStateDescription vmstate_virtio_gpu_scanouts = {
1131 .name = "virtio-gpu-scanouts",
1132 .version_id = 1,
1133 .fields = (VMStateField[]) {
1134 VMSTATE_INT32(parent_obj.enable, struct VirtIOGPU),
1135 VMSTATE_UINT32_EQUAL(parent_obj.conf.max_outputs,
1136 struct VirtIOGPU, NULL),
1137 VMSTATE_STRUCT_VARRAY_UINT32(parent_obj.scanout, struct VirtIOGPU,
1138 parent_obj.conf.max_outputs, 1,
1139 vmstate_virtio_gpu_scanout,
1140 struct virtio_gpu_scanout),
1141 VMSTATE_END_OF_LIST()
1142 },
1143 };
1144
1145 static int virtio_gpu_save(QEMUFile *f, void *opaque, size_t size,
1146 const VMStateField *field, JSONWriter *vmdesc)
1147 {
1148 VirtIOGPU *g = opaque;
1149 struct virtio_gpu_simple_resource *res;
1150 int i;
1151
1152 /* in 2d mode we should never find unprocessed commands here */
1153 assert(QTAILQ_EMPTY(&g->cmdq));
1154
1155 QTAILQ_FOREACH(res, &g->reslist, next) {
1156 qemu_put_be32(f, res->resource_id);
1157 qemu_put_be32(f, res->width);
1158 qemu_put_be32(f, res->height);
1159 qemu_put_be32(f, res->format);
1160 qemu_put_be32(f, res->iov_cnt);
1161 for (i = 0; i < res->iov_cnt; i++) {
1162 qemu_put_be64(f, res->addrs[i]);
1163 qemu_put_be32(f, res->iov[i].iov_len);
1164 }
1165 qemu_put_buffer(f, (void *)pixman_image_get_data(res->image),
1166 pixman_image_get_stride(res->image) * res->height);
1167 }
1168 qemu_put_be32(f, 0); /* end of list */
1169
1170 return vmstate_save_state(f, &vmstate_virtio_gpu_scanouts, g, NULL);
1171 }
1172
1173 static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
1174 const VMStateField *field)
1175 {
1176 VirtIOGPU *g = opaque;
1177 struct virtio_gpu_simple_resource *res;
1178 struct virtio_gpu_scanout *scanout;
1179 uint32_t resource_id, pformat;
1180 int i;
1181
1182 g->hostmem = 0;
1183
1184 resource_id = qemu_get_be32(f);
1185 while (resource_id != 0) {
1186 res = virtio_gpu_find_resource(g, resource_id);
1187 if (res) {
1188 return -EINVAL;
1189 }
1190
1191 res = g_new0(struct virtio_gpu_simple_resource, 1);
1192 res->resource_id = resource_id;
1193 res->width = qemu_get_be32(f);
1194 res->height = qemu_get_be32(f);
1195 res->format = qemu_get_be32(f);
1196 res->iov_cnt = qemu_get_be32(f);
1197
1198 /* allocate */
1199 pformat = virtio_gpu_get_pixman_format(res->format);
1200 if (!pformat) {
1201 g_free(res);
1202 return -EINVAL;
1203 }
1204 res->image = pixman_image_create_bits(pformat,
1205 res->width, res->height,
1206 NULL, 0);
1207 if (!res->image) {
1208 g_free(res);
1209 return -EINVAL;
1210 }
1211
1212 res->hostmem = calc_image_hostmem(pformat, res->width, res->height);
1213
1214 res->addrs = g_new(uint64_t, res->iov_cnt);
1215 res->iov = g_new(struct iovec, res->iov_cnt);
1216
1217 /* read data */
1218 for (i = 0; i < res->iov_cnt; i++) {
1219 res->addrs[i] = qemu_get_be64(f);
1220 res->iov[i].iov_len = qemu_get_be32(f);
1221 }
1222 qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
1223 pixman_image_get_stride(res->image) * res->height);
1224
1225 /* restore mapping */
1226 for (i = 0; i < res->iov_cnt; i++) {
1227 hwaddr len = res->iov[i].iov_len;
1228 res->iov[i].iov_base =
1229 dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
1230 res->addrs[i], &len, DMA_DIRECTION_TO_DEVICE);
1231
1232 if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
1233 /* Clean up the half-a-mapping we just created... */
1234 if (res->iov[i].iov_base) {
1235 dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
1236 res->iov[i].iov_base,
1237 len,
1238 DMA_DIRECTION_TO_DEVICE,
1239 0);
1240 }
1241 /* ...and the mappings for previous loop iterations */
1242 res->iov_cnt = i;
1243 virtio_gpu_cleanup_mapping(g, res);
1244 pixman_image_unref(res->image);
1245 g_free(res);
1246 return -EINVAL;
1247 }
1248 }
1249
1250 QTAILQ_INSERT_HEAD(&g->reslist, res, next);
1251 g->hostmem += res->hostmem;
1252
1253 resource_id = qemu_get_be32(f);
1254 }
1255
1256 /* load & apply scanout state */
1257 vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1);
1258 for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
1259 scanout = &g->parent_obj.scanout[i];
1260 if (!scanout->resource_id) {
1261 continue;
1262 }
1263 res = virtio_gpu_find_resource(g, scanout->resource_id);
1264 if (!res) {
1265 return -EINVAL;
1266 }
1267 scanout->ds = qemu_create_displaysurface_pixman(res->image);
1268 if (!scanout->ds) {
1269 return -EINVAL;
1270 }
1271
1272 dpy_gfx_replace_surface(scanout->con, scanout->ds);
1273 dpy_gfx_update_full(scanout->con);
1274 if (scanout->cursor.resource_id) {
1275 update_cursor(g, &scanout->cursor);
1276 }
1277 res->scanout_bitmask |= (1 << i);
1278 }
1279
1280 return 0;
1281 }
1282
1283 void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
1284 {
1285 VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
1286 VirtIOGPU *g = VIRTIO_GPU(qdev);
1287
1288 if (virtio_gpu_blob_enabled(g->parent_obj.conf)) {
1289 if (!virtio_gpu_have_udmabuf()) {
1290 error_setg(errp, "cannot enable blob resources without udmabuf");
1291 return;
1292 }
1293
1294 if (virtio_gpu_virgl_enabled(g->parent_obj.conf)) {
1295 error_setg(errp, "blobs and virgl are not compatible (yet)");
1296 return;
1297 }
1298 }
1299
1300 if (!virtio_gpu_base_device_realize(qdev,
1301 virtio_gpu_handle_ctrl_cb,
1302 virtio_gpu_handle_cursor_cb,
1303 errp)) {
1304 return;
1305 }
1306
1307 g->ctrl_vq = virtio_get_queue(vdev, 0);
1308 g->cursor_vq = virtio_get_queue(vdev, 1);
1309 g->ctrl_bh = qemu_bh_new(virtio_gpu_ctrl_bh, g);
1310 g->cursor_bh = qemu_bh_new(virtio_gpu_cursor_bh, g);
1311 QTAILQ_INIT(&g->reslist);
1312 QTAILQ_INIT(&g->cmdq);
1313 QTAILQ_INIT(&g->fenceq);
1314 }
1315
1316 void virtio_gpu_reset(VirtIODevice *vdev)
1317 {
1318 VirtIOGPU *g = VIRTIO_GPU(vdev);
1319 struct virtio_gpu_simple_resource *res, *tmp;
1320 struct virtio_gpu_ctrl_command *cmd;
1321
1322 QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) {
1323 virtio_gpu_resource_destroy(g, res);
1324 }
1325
1326 while (!QTAILQ_EMPTY(&g->cmdq)) {
1327 cmd = QTAILQ_FIRST(&g->cmdq);
1328 QTAILQ_REMOVE(&g->cmdq, cmd, next);
1329 g_free(cmd);
1330 }
1331
1332 while (!QTAILQ_EMPTY(&g->fenceq)) {
1333 cmd = QTAILQ_FIRST(&g->fenceq);
1334 QTAILQ_REMOVE(&g->fenceq, cmd, next);
1335 g->inflight--;
1336 g_free(cmd);
1337 }
1338
1339 virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
1340 }
1341
1342 static void
1343 virtio_gpu_get_config(VirtIODevice *vdev, uint8_t *config)
1344 {
1345 VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
1346
1347 memcpy(config, &g->virtio_config, sizeof(g->virtio_config));
1348 }
1349
1350 static void
1351 virtio_gpu_set_config(VirtIODevice *vdev, const uint8_t *config)
1352 {
1353 VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
1354 const struct virtio_gpu_config *vgconfig =
1355 (const struct virtio_gpu_config *)config;
1356
1357 if (vgconfig->events_clear) {
1358 g->virtio_config.events_read &= ~vgconfig->events_clear;
1359 }
1360 }
1361
1362 /*
1363 * For historical reasons virtio_gpu does not adhere to virtio migration
1364 * scheme as described in doc/virtio-migration.txt, in a sense that no
1365 * save/load callback are provided to the core. Instead the device data
1366 * is saved/loaded after the core data.
1367 *
1368 * Because of this we need a special vmsd.
1369 */
1370 static const VMStateDescription vmstate_virtio_gpu = {
1371 .name = "virtio-gpu",
1372 .minimum_version_id = VIRTIO_GPU_VM_VERSION,
1373 .version_id = VIRTIO_GPU_VM_VERSION,
1374 .fields = (VMStateField[]) {
1375 VMSTATE_VIRTIO_DEVICE /* core */,
1376 {
1377 .name = "virtio-gpu",
1378 .info = &(const VMStateInfo) {
1379 .name = "virtio-gpu",
1380 .get = virtio_gpu_load,
1381 .put = virtio_gpu_save,
1382 },
1383 .flags = VMS_SINGLE,
1384 } /* device */,
1385 VMSTATE_END_OF_LIST()
1386 },
1387 };
1388
1389 static Property virtio_gpu_properties[] = {
1390 VIRTIO_GPU_BASE_PROPERTIES(VirtIOGPU, parent_obj.conf),
1391 DEFINE_PROP_SIZE("max_hostmem", VirtIOGPU, conf_max_hostmem,
1392 256 * MiB),
1393 DEFINE_PROP_BIT("blob", VirtIOGPU, parent_obj.conf.flags,
1394 VIRTIO_GPU_FLAG_BLOB_ENABLED, false),
1395 DEFINE_PROP_END_OF_LIST(),
1396 };
1397
1398 static void virtio_gpu_class_init(ObjectClass *klass, void *data)
1399 {
1400 DeviceClass *dc = DEVICE_CLASS(klass);
1401 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1402 VirtIOGPUClass *vgc = VIRTIO_GPU_CLASS(klass);
1403
1404 vgc->handle_ctrl = virtio_gpu_handle_ctrl;
1405 vgc->process_cmd = virtio_gpu_simple_process_cmd;
1406 vgc->update_cursor_data = virtio_gpu_update_cursor_data;
1407
1408 vdc->realize = virtio_gpu_device_realize;
1409 vdc->reset = virtio_gpu_reset;
1410 vdc->get_config = virtio_gpu_get_config;
1411 vdc->set_config = virtio_gpu_set_config;
1412
1413 dc->vmsd = &vmstate_virtio_gpu;
1414 device_class_set_props(dc, virtio_gpu_properties);
1415 }
1416
1417 static const TypeInfo virtio_gpu_info = {
1418 .name = TYPE_VIRTIO_GPU,
1419 .parent = TYPE_VIRTIO_GPU_BASE,
1420 .instance_size = sizeof(VirtIOGPU),
1421 .class_size = sizeof(VirtIOGPUClass),
1422 .class_init = virtio_gpu_class_init,
1423 };
1424 module_obj(TYPE_VIRTIO_GPU);
1425
1426 static void virtio_register_types(void)
1427 {
1428 type_register_static(&virtio_gpu_info);
1429 }
1430
1431 type_init(virtio_register_types)
AR7 emulation for QEMU