tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Authors:
6 * Dave Airlie <airlied@redhat.com>
7 * Gerd Hoffmann <kraxel@redhat.com>
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
18 * Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
27 */
28
29#include <linux/dma-mapping.h>
30#include <linux/virtio.h>
31#include <linux/virtio_config.h>
32#include <linux/virtio_ring.h>
33
34#include "virtgpu_drv.h"
35#include "virtgpu_trace.h"
36
37#define MAX_INLINE_CMD_SIZE 96
38#define MAX_INLINE_RESP_SIZE 24
39#define VBUFFER_SIZE (sizeof(struct virtio_gpu_vbuffer) \
40 + MAX_INLINE_CMD_SIZE \
41 + MAX_INLINE_RESP_SIZE)
42
43void virtio_gpu_ctrl_ack(struct virtqueue *vq)
44{
45 struct drm_device *dev = vq->vdev->priv;
46 struct virtio_gpu_device *vgdev = dev->dev_private;
47
48 schedule_work(&vgdev->ctrlq.dequeue_work);
49}
50
51void virtio_gpu_cursor_ack(struct virtqueue *vq)
52{
53 struct drm_device *dev = vq->vdev->priv;
54 struct virtio_gpu_device *vgdev = dev->dev_private;
55
56 schedule_work(&vgdev->cursorq.dequeue_work);
57}
58
59int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)
60{
61 vgdev->vbufs = kmem_cache_create("virtio-gpu-vbufs",
62 VBUFFER_SIZE,
63 __alignof__(struct virtio_gpu_vbuffer),
64 0, NULL);
65 if (!vgdev->vbufs)
66 return -ENOMEM;
67 return 0;
68}
69
70void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
71{
72 kmem_cache_destroy(vgdev->vbufs);
73 vgdev->vbufs = NULL;
74}
75
76static struct virtio_gpu_vbuffer*
77virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,
78 int size, int resp_size, void *resp_buf,
79 virtio_gpu_resp_cb resp_cb)
80{
81 struct virtio_gpu_vbuffer *vbuf;
82
83 vbuf = kmem_cache_zalloc(vgdev->vbufs, GFP_KERNEL);
84 if (!vbuf)
85 return ERR_PTR(-ENOMEM);
86
87 BUG_ON(size > MAX_INLINE_CMD_SIZE);
88 vbuf->buf = (void *)vbuf + sizeof(*vbuf);
89 vbuf->size = size;
90
91 vbuf->resp_cb = resp_cb;
92 vbuf->resp_size = resp_size;
93 if (resp_size <= MAX_INLINE_RESP_SIZE)
94 vbuf->resp_buf = (void *)vbuf->buf + size;
95 else
96 vbuf->resp_buf = resp_buf;
97 BUG_ON(!vbuf->resp_buf);
98 return vbuf;
99}
100
101static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,
102 struct virtio_gpu_vbuffer **vbuffer_p,
103 int size)
104{
105 struct virtio_gpu_vbuffer *vbuf;
106
107 vbuf = virtio_gpu_get_vbuf(vgdev, size,
108 sizeof(struct virtio_gpu_ctrl_hdr),
109 NULL, NULL);
110 if (IS_ERR(vbuf)) {
111 *vbuffer_p = NULL;
112 return ERR_CAST(vbuf);
113 }
114 *vbuffer_p = vbuf;
115 return vbuf->buf;
116}
117
118static struct virtio_gpu_update_cursor*
119virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,
120 struct virtio_gpu_vbuffer **vbuffer_p)
121{
122 struct virtio_gpu_vbuffer *vbuf;
123
124 vbuf = virtio_gpu_get_vbuf
125 (vgdev, sizeof(struct virtio_gpu_update_cursor),
126 0, NULL, NULL);
127 if (IS_ERR(vbuf)) {
128 *vbuffer_p = NULL;
129 return ERR_CAST(vbuf);
130 }
131 *vbuffer_p = vbuf;
132 return (struct virtio_gpu_update_cursor *)vbuf->buf;
133}
134
135static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,
136 virtio_gpu_resp_cb cb,
137 struct virtio_gpu_vbuffer **vbuffer_p,
138 int cmd_size, int resp_size,
139 void *resp_buf)
140{
141 struct virtio_gpu_vbuffer *vbuf;
142
143 vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,
144 resp_size, resp_buf, cb);
145 if (IS_ERR(vbuf)) {
146 *vbuffer_p = NULL;
147 return ERR_CAST(vbuf);
148 }
149 *vbuffer_p = vbuf;
150 return (struct virtio_gpu_command *)vbuf->buf;
151}
152
153static void free_vbuf(struct virtio_gpu_device *vgdev,
154 struct virtio_gpu_vbuffer *vbuf)
155{
156 if (vbuf->resp_size > MAX_INLINE_RESP_SIZE)
157 kfree(vbuf->resp_buf);
158 kvfree(vbuf->data_buf);
159 kmem_cache_free(vgdev->vbufs, vbuf);
160}
161
162static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)
163{
164 struct virtio_gpu_vbuffer *vbuf;
165 unsigned int len;
166 int freed = 0;
167
168 while ((vbuf = virtqueue_get_buf(vq, &len))) {
169 list_add_tail(&vbuf->list, reclaim_list);
170 freed++;
171 }
172 if (freed == 0)
173 DRM_DEBUG("Huh? zero vbufs reclaimed");
174}
175
176void virtio_gpu_dequeue_ctrl_func(struct work_struct *work)
177{
178 struct virtio_gpu_device *vgdev =
179 container_of(work, struct virtio_gpu_device,
180 ctrlq.dequeue_work);
181 struct list_head reclaim_list;
182 struct virtio_gpu_vbuffer *entry, *tmp;
183 struct virtio_gpu_ctrl_hdr *resp;
184 u64 fence_id = 0;
185
186 INIT_LIST_HEAD(&reclaim_list);
187 spin_lock(&vgdev->ctrlq.qlock);
188 do {
189 virtqueue_disable_cb(vgdev->ctrlq.vq);
190 reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);
191
192 } while (!virtqueue_enable_cb(vgdev->ctrlq.vq));
193 spin_unlock(&vgdev->ctrlq.qlock);
194
195 list_for_each_entry(entry, &reclaim_list, list) {
196 resp = (struct virtio_gpu_ctrl_hdr *)entry->resp_buf;
197
198 trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp);
199
200 if (resp->type != cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA)) {
201 if (resp->type >= cpu_to_le32(VIRTIO_GPU_RESP_ERR_UNSPEC)) {
202 struct virtio_gpu_ctrl_hdr *cmd;
203 cmd = (struct virtio_gpu_ctrl_hdr *)entry->buf;
204 DRM_ERROR("response 0x%x (command 0x%x)\n",
205 le32_to_cpu(resp->type),
206 le32_to_cpu(cmd->type));
207 } else
208 DRM_DEBUG("response 0x%x\n", le32_to_cpu(resp->type));
209 }
210 if (resp->flags & cpu_to_le32(VIRTIO_GPU_FLAG_FENCE)) {
211 u64 f = le64_to_cpu(resp->fence_id);
212
213 if (fence_id > f) {
214 DRM_ERROR("%s: Oops: fence %llx -> %llx\n",
215 __func__, fence_id, f);
216 } else {
217 fence_id = f;
218 }
219 }
220 if (entry->resp_cb)
221 entry->resp_cb(vgdev, entry);
222 }
223 wake_up(&vgdev->ctrlq.ack_queue);
224
225 if (fence_id)
226 virtio_gpu_fence_event_process(vgdev, fence_id);
227
228 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
229 if (entry->objs)
230 virtio_gpu_array_put_free_delayed(vgdev, entry->objs);
231 list_del(&entry->list);
232 free_vbuf(vgdev, entry);
233 }
234}
235
236void virtio_gpu_dequeue_cursor_func(struct work_struct *work)
237{
238 struct virtio_gpu_device *vgdev =
239 container_of(work, struct virtio_gpu_device,
240 cursorq.dequeue_work);
241 struct list_head reclaim_list;
242 struct virtio_gpu_vbuffer *entry, *tmp;
243
244 INIT_LIST_HEAD(&reclaim_list);
245 spin_lock(&vgdev->cursorq.qlock);
246 do {
247 virtqueue_disable_cb(vgdev->cursorq.vq);
248 reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);
249 } while (!virtqueue_enable_cb(vgdev->cursorq.vq));
250 spin_unlock(&vgdev->cursorq.qlock);
251
252 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
253 list_del(&entry->list);
254 free_vbuf(vgdev, entry);
255 }
256 wake_up(&vgdev->cursorq.ack_queue);
257}
258
259/* Create sg_table from a vmalloc'd buffer. */
260static struct sg_table *vmalloc_to_sgt(char *data, uint32_t size, int *sg_ents)
261{
262 int ret, s, i;
263 struct sg_table *sgt;
264 struct scatterlist *sg;
265 struct page *pg;
266
267 if (WARN_ON(!PAGE_ALIGNED(data)))
268 return NULL;
269
270 sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
271 if (!sgt)
272 return NULL;
273
274 *sg_ents = DIV_ROUND_UP(size, PAGE_SIZE);
275 ret = sg_alloc_table(sgt, *sg_ents, GFP_KERNEL);
276 if (ret) {
277 kfree(sgt);
278 return NULL;
279 }
280
281 for_each_sg(sgt->sgl, sg, *sg_ents, i) {
282 pg = vmalloc_to_page(data);
283 if (!pg) {
284 sg_free_table(sgt);
285 kfree(sgt);
286 return NULL;
287 }
288
289 s = min_t(int, PAGE_SIZE, size);
290 sg_set_page(sg, pg, s, 0);
291
292 size -= s;
293 data += s;
294 }
295
296 return sgt;
297}
298
299static bool virtio_gpu_queue_ctrl_buffer_locked(struct virtio_gpu_device *vgdev,
300 struct virtio_gpu_vbuffer *vbuf,
301 struct scatterlist *vout)
302 __releases(&vgdev->ctrlq.qlock)
303 __acquires(&vgdev->ctrlq.qlock)
304{
305 struct virtqueue *vq = vgdev->ctrlq.vq;
306 struct scatterlist *sgs[3], vcmd, vresp;
307 int outcnt = 0, incnt = 0;
308 bool notify = false;
309 int ret;
310
311 if (!vgdev->vqs_ready)
312 return notify;
313
314 sg_init_one(&vcmd, vbuf->buf, vbuf->size);
315 sgs[outcnt + incnt] = &vcmd;
316 outcnt++;
317
318 if (vout) {
319 sgs[outcnt + incnt] = vout;
320 outcnt++;
321 }
322
323 if (vbuf->resp_size) {
324 sg_init_one(&vresp, vbuf->resp_buf, vbuf->resp_size);
325 sgs[outcnt + incnt] = &vresp;
326 incnt++;
327 }
328
329retry:
330 ret = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC);
331 if (ret == -ENOSPC) {
332 spin_unlock(&vgdev->ctrlq.qlock);
333 wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= outcnt + incnt);
334 spin_lock(&vgdev->ctrlq.qlock);
335 goto retry;
336 } else {
337 trace_virtio_gpu_cmd_queue(vq,
338 (struct virtio_gpu_ctrl_hdr *)vbuf->buf);
339
340 notify = virtqueue_kick_prepare(vq);
341 }
342 return notify;
343}
344
345static void virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
346 struct virtio_gpu_vbuffer *vbuf,
347 struct virtio_gpu_ctrl_hdr *hdr,
348 struct virtio_gpu_fence *fence)
349{
350 struct virtqueue *vq = vgdev->ctrlq.vq;
351 struct scatterlist *vout = NULL, sg;
352 struct sg_table *sgt = NULL;
353 bool notify;
354 int outcnt = 0;
355
356 if (vbuf->data_size) {
357 if (is_vmalloc_addr(vbuf->data_buf)) {
358 sgt = vmalloc_to_sgt(vbuf->data_buf, vbuf->data_size,
359 &outcnt);
360 if (!sgt)
361 return;
362 vout = sgt->sgl;
363 } else {
364 sg_init_one(&sg, vbuf->data_buf, vbuf->data_size);
365 vout = &sg;
366 outcnt = 1;
367 }
368 }
369
370again:
371 spin_lock(&vgdev->ctrlq.qlock);
372
373 /*
374 * Make sure we have enouth space in the virtqueue. If not
375 * wait here until we have.
376 *
377 * Without that virtio_gpu_queue_ctrl_buffer_nolock might have
378 * to wait for free space, which can result in fence ids being
379 * submitted out-of-order.
380 */
381 if (vq->num_free < 2 + outcnt) {
382 spin_unlock(&vgdev->ctrlq.qlock);
383 wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= 3);
384 goto again;
385 }
386
387 if (hdr && fence) {
388 virtio_gpu_fence_emit(vgdev, hdr, fence);
389 if (vbuf->objs) {
390 virtio_gpu_array_add_fence(vbuf->objs, &fence->f);
391 virtio_gpu_array_unlock_resv(vbuf->objs);
392 }
393 }
394 notify = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf, vout);
395 spin_unlock(&vgdev->ctrlq.qlock);
396 if (notify)
397 virtqueue_notify(vgdev->ctrlq.vq);
398
399 if (sgt) {
400 sg_free_table(sgt);
401 kfree(sgt);
402 }
403}
404
405static void virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,
406 struct virtio_gpu_vbuffer *vbuf)
407{
408 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, NULL, NULL);
409}
410
411static void virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,
412 struct virtio_gpu_vbuffer *vbuf)
413{
414 struct virtqueue *vq = vgdev->cursorq.vq;
415 struct scatterlist *sgs[1], ccmd;
416 bool notify;
417 int ret;
418 int outcnt;
419
420 if (!vgdev->vqs_ready)
421 return;
422
423 sg_init_one(&ccmd, vbuf->buf, vbuf->size);
424 sgs[0] = &ccmd;
425 outcnt = 1;
426
427 spin_lock(&vgdev->cursorq.qlock);
428retry:
429 ret = virtqueue_add_sgs(vq, sgs, outcnt, 0, vbuf, GFP_ATOMIC);
430 if (ret == -ENOSPC) {
431 spin_unlock(&vgdev->cursorq.qlock);
432 wait_event(vgdev->cursorq.ack_queue, vq->num_free >= outcnt);
433 spin_lock(&vgdev->cursorq.qlock);
434 goto retry;
435 } else {
436 trace_virtio_gpu_cmd_queue(vq,
437 (struct virtio_gpu_ctrl_hdr *)vbuf->buf);
438
439 notify = virtqueue_kick_prepare(vq);
440 }
441
442 spin_unlock(&vgdev->cursorq.qlock);
443
444 if (notify)
445 virtqueue_notify(vq);
446}
447
448/* just create gem objects for userspace and long lived objects,
449 * just use dma_alloced pages for the queue objects?
450 */
451
452/* create a basic resource */
453void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
454 struct virtio_gpu_object *bo,
455 struct virtio_gpu_object_params *params,
456 struct virtio_gpu_object_array *objs,
457 struct virtio_gpu_fence *fence)
458{
459 struct virtio_gpu_resource_create_2d *cmd_p;
460 struct virtio_gpu_vbuffer *vbuf;
461
462 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
463 memset(cmd_p, 0, sizeof(*cmd_p));
464 vbuf->objs = objs;
465
466 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_2D);
467 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
468 cmd_p->format = cpu_to_le32(params->format);
469 cmd_p->width = cpu_to_le32(params->width);
470 cmd_p->height = cpu_to_le32(params->height);
471
472 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
473 bo->created = true;
474}
475
476void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
477 uint32_t resource_id)
478{
479 struct virtio_gpu_resource_unref *cmd_p;
480 struct virtio_gpu_vbuffer *vbuf;
481
482 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
483 memset(cmd_p, 0, sizeof(*cmd_p));
484
485 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_UNREF);
486 cmd_p->resource_id = cpu_to_le32(resource_id);
487
488 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
489}
490
491static void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
492 uint32_t resource_id,
493 struct virtio_gpu_fence *fence)
494{
495 struct virtio_gpu_resource_detach_backing *cmd_p;
496 struct virtio_gpu_vbuffer *vbuf;
497
498 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
499 memset(cmd_p, 0, sizeof(*cmd_p));
500
501 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING);
502 cmd_p->resource_id = cpu_to_le32(resource_id);
503
504 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
505}
506
507void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
508 uint32_t scanout_id, uint32_t resource_id,
509 uint32_t width, uint32_t height,
510 uint32_t x, uint32_t y)
511{
512 struct virtio_gpu_set_scanout *cmd_p;
513 struct virtio_gpu_vbuffer *vbuf;
514
515 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
516 memset(cmd_p, 0, sizeof(*cmd_p));
517
518 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SET_SCANOUT);
519 cmd_p->resource_id = cpu_to_le32(resource_id);
520 cmd_p->scanout_id = cpu_to_le32(scanout_id);
521 cmd_p->r.width = cpu_to_le32(width);
522 cmd_p->r.height = cpu_to_le32(height);
523 cmd_p->r.x = cpu_to_le32(x);
524 cmd_p->r.y = cpu_to_le32(y);
525
526 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
527}
528
529void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
530 uint32_t resource_id,
531 uint32_t x, uint32_t y,
532 uint32_t width, uint32_t height)
533{
534 struct virtio_gpu_resource_flush *cmd_p;
535 struct virtio_gpu_vbuffer *vbuf;
536
537 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
538 memset(cmd_p, 0, sizeof(*cmd_p));
539
540 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_FLUSH);
541 cmd_p->resource_id = cpu_to_le32(resource_id);
542 cmd_p->r.width = cpu_to_le32(width);
543 cmd_p->r.height = cpu_to_le32(height);
544 cmd_p->r.x = cpu_to_le32(x);
545 cmd_p->r.y = cpu_to_le32(y);
546
547 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
548}
549
550void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
551 uint64_t offset,
552 uint32_t width, uint32_t height,
553 uint32_t x, uint32_t y,
554 struct virtio_gpu_object_array *objs,
555 struct virtio_gpu_fence *fence)
556{
557 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
558 struct virtio_gpu_transfer_to_host_2d *cmd_p;
559 struct virtio_gpu_vbuffer *vbuf;
560 bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
561
562 if (use_dma_api)
563 dma_sync_sg_for_device(vgdev->vdev->dev.parent,
564 bo->pages->sgl, bo->pages->nents,
565 DMA_TO_DEVICE);
566
567 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
568 memset(cmd_p, 0, sizeof(*cmd_p));
569 vbuf->objs = objs;
570
571 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D);
572 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
573 cmd_p->offset = cpu_to_le64(offset);
574 cmd_p->r.width = cpu_to_le32(width);
575 cmd_p->r.height = cpu_to_le32(height);
576 cmd_p->r.x = cpu_to_le32(x);
577 cmd_p->r.y = cpu_to_le32(y);
578
579 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
580}
581
582static void
583virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,
584 uint32_t resource_id,
585 struct virtio_gpu_mem_entry *ents,
586 uint32_t nents,
587 struct virtio_gpu_fence *fence)
588{
589 struct virtio_gpu_resource_attach_backing *cmd_p;
590 struct virtio_gpu_vbuffer *vbuf;
591
592 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
593 memset(cmd_p, 0, sizeof(*cmd_p));
594
595 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING);
596 cmd_p->resource_id = cpu_to_le32(resource_id);
597 cmd_p->nr_entries = cpu_to_le32(nents);
598
599 vbuf->data_buf = ents;
600 vbuf->data_size = sizeof(*ents) * nents;
601
602 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
603}
604
605static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,
606 struct virtio_gpu_vbuffer *vbuf)
607{
608 struct virtio_gpu_resp_display_info *resp =
609 (struct virtio_gpu_resp_display_info *)vbuf->resp_buf;
610 int i;
611
612 spin_lock(&vgdev->display_info_lock);
613 for (i = 0; i < vgdev->num_scanouts; i++) {
614 vgdev->outputs[i].info = resp->pmodes[i];
615 if (resp->pmodes[i].enabled) {
616 DRM_DEBUG("output %d: %dx%d+%d+%d", i,
617 le32_to_cpu(resp->pmodes[i].r.width),
618 le32_to_cpu(resp->pmodes[i].r.height),
619 le32_to_cpu(resp->pmodes[i].r.x),
620 le32_to_cpu(resp->pmodes[i].r.y));
621 } else {
622 DRM_DEBUG("output %d: disabled", i);
623 }
624 }
625
626 vgdev->display_info_pending = false;
627 spin_unlock(&vgdev->display_info_lock);
628 wake_up(&vgdev->resp_wq);
629
630 if (!drm_helper_hpd_irq_event(vgdev->ddev))
631 drm_kms_helper_hotplug_event(vgdev->ddev);
632}
633
634static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,
635 struct virtio_gpu_vbuffer *vbuf)
636{
637 struct virtio_gpu_get_capset_info *cmd =
638 (struct virtio_gpu_get_capset_info *)vbuf->buf;
639 struct virtio_gpu_resp_capset_info *resp =
640 (struct virtio_gpu_resp_capset_info *)vbuf->resp_buf;
641 int i = le32_to_cpu(cmd->capset_index);
642
643 spin_lock(&vgdev->display_info_lock);
644 vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);
645 vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);
646 vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);
647 spin_unlock(&vgdev->display_info_lock);
648 wake_up(&vgdev->resp_wq);
649}
650
651static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,
652 struct virtio_gpu_vbuffer *vbuf)
653{
654 struct virtio_gpu_get_capset *cmd =
655 (struct virtio_gpu_get_capset *)vbuf->buf;
656 struct virtio_gpu_resp_capset *resp =
657 (struct virtio_gpu_resp_capset *)vbuf->resp_buf;
658 struct virtio_gpu_drv_cap_cache *cache_ent;
659
660 spin_lock(&vgdev->display_info_lock);
661 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
662 if (cache_ent->version == le32_to_cpu(cmd->capset_version) &&
663 cache_ent->id == le32_to_cpu(cmd->capset_id)) {
664 memcpy(cache_ent->caps_cache, resp->capset_data,
665 cache_ent->size);
666 /* Copy must occur before is_valid is signalled. */
667 smp_wmb();
668 atomic_set(&cache_ent->is_valid, 1);
669 break;
670 }
671 }
672 spin_unlock(&vgdev->display_info_lock);
673 wake_up_all(&vgdev->resp_wq);
674}
675
676static int virtio_get_edid_block(void *data, u8 *buf,
677 unsigned int block, size_t len)
678{
679 struct virtio_gpu_resp_edid *resp = data;
680 size_t start = block * EDID_LENGTH;
681
682 if (start + len > le32_to_cpu(resp->size))
683 return -1;
684 memcpy(buf, resp->edid + start, len);
685 return 0;
686}
687
688static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev,
689 struct virtio_gpu_vbuffer *vbuf)
690{
691 struct virtio_gpu_cmd_get_edid *cmd =
692 (struct virtio_gpu_cmd_get_edid *)vbuf->buf;
693 struct virtio_gpu_resp_edid *resp =
694 (struct virtio_gpu_resp_edid *)vbuf->resp_buf;
695 uint32_t scanout = le32_to_cpu(cmd->scanout);
696 struct virtio_gpu_output *output;
697 struct edid *new_edid, *old_edid;
698
699 if (scanout >= vgdev->num_scanouts)
700 return;
701 output = vgdev->outputs + scanout;
702
703 new_edid = drm_do_get_edid(&output->conn, virtio_get_edid_block, resp);
704 drm_connector_update_edid_property(&output->conn, new_edid);
705
706 spin_lock(&vgdev->display_info_lock);
707 old_edid = output->edid;
708 output->edid = new_edid;
709 spin_unlock(&vgdev->display_info_lock);
710
711 kfree(old_edid);
712 wake_up(&vgdev->resp_wq);
713}
714
715int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)
716{
717 struct virtio_gpu_ctrl_hdr *cmd_p;
718 struct virtio_gpu_vbuffer *vbuf;
719 void *resp_buf;
720
721 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_display_info),
722 GFP_KERNEL);
723 if (!resp_buf)
724 return -ENOMEM;
725
726 cmd_p = virtio_gpu_alloc_cmd_resp
727 (vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,
728 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_display_info),
729 resp_buf);
730 memset(cmd_p, 0, sizeof(*cmd_p));
731
732 vgdev->display_info_pending = true;
733 cmd_p->type = cpu_to_le32(VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
734 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
735 return 0;
736}
737
738int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)
739{
740 struct virtio_gpu_get_capset_info *cmd_p;
741 struct virtio_gpu_vbuffer *vbuf;
742 void *resp_buf;
743
744 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset_info),
745 GFP_KERNEL);
746 if (!resp_buf)
747 return -ENOMEM;
748
749 cmd_p = virtio_gpu_alloc_cmd_resp
750 (vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,
751 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_capset_info),
752 resp_buf);
753 memset(cmd_p, 0, sizeof(*cmd_p));
754
755 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET_INFO);
756 cmd_p->capset_index = cpu_to_le32(idx);
757 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
758 return 0;
759}
760
761int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
762 int idx, int version,
763 struct virtio_gpu_drv_cap_cache **cache_p)
764{
765 struct virtio_gpu_get_capset *cmd_p;
766 struct virtio_gpu_vbuffer *vbuf;
767 int max_size;
768 struct virtio_gpu_drv_cap_cache *cache_ent;
769 struct virtio_gpu_drv_cap_cache *search_ent;
770 void *resp_buf;
771
772 *cache_p = NULL;
773
774 if (idx >= vgdev->num_capsets)
775 return -EINVAL;
776
777 if (version > vgdev->capsets[idx].max_version)
778 return -EINVAL;
779
780 cache_ent = kzalloc(sizeof(*cache_ent), GFP_KERNEL);
781 if (!cache_ent)
782 return -ENOMEM;
783
784 max_size = vgdev->capsets[idx].max_size;
785 cache_ent->caps_cache = kmalloc(max_size, GFP_KERNEL);
786 if (!cache_ent->caps_cache) {
787 kfree(cache_ent);
788 return -ENOMEM;
789 }
790
791 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset) + max_size,
792 GFP_KERNEL);
793 if (!resp_buf) {
794 kfree(cache_ent->caps_cache);
795 kfree(cache_ent);
796 return -ENOMEM;
797 }
798
799 cache_ent->version = version;
800 cache_ent->id = vgdev->capsets[idx].id;
801 atomic_set(&cache_ent->is_valid, 0);
802 cache_ent->size = max_size;
803 spin_lock(&vgdev->display_info_lock);
804 /* Search while under lock in case it was added by another task. */
805 list_for_each_entry(search_ent, &vgdev->cap_cache, head) {
806 if (search_ent->id == vgdev->capsets[idx].id &&
807 search_ent->version == version) {
808 *cache_p = search_ent;
809 break;
810 }
811 }
812 if (!*cache_p)
813 list_add_tail(&cache_ent->head, &vgdev->cap_cache);
814 spin_unlock(&vgdev->display_info_lock);
815
816 if (*cache_p) {
817 /* Entry was found, so free everything that was just created. */
818 kfree(resp_buf);
819 kfree(cache_ent->caps_cache);
820 kfree(cache_ent);
821 return 0;
822 }
823
824 cmd_p = virtio_gpu_alloc_cmd_resp
825 (vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),
826 sizeof(struct virtio_gpu_resp_capset) + max_size,
827 resp_buf);
828 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET);
829 cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);
830 cmd_p->capset_version = cpu_to_le32(version);
831 *cache_p = cache_ent;
832 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
833
834 return 0;
835}
836
837int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev)
838{
839 struct virtio_gpu_cmd_get_edid *cmd_p;
840 struct virtio_gpu_vbuffer *vbuf;
841 void *resp_buf;
842 int scanout;
843
844 if (WARN_ON(!vgdev->has_edid))
845 return -EINVAL;
846
847 for (scanout = 0; scanout < vgdev->num_scanouts; scanout++) {
848 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_edid),
849 GFP_KERNEL);
850 if (!resp_buf)
851 return -ENOMEM;
852
853 cmd_p = virtio_gpu_alloc_cmd_resp
854 (vgdev, &virtio_gpu_cmd_get_edid_cb, &vbuf,
855 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_edid),
856 resp_buf);
857 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_EDID);
858 cmd_p->scanout = cpu_to_le32(scanout);
859 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
860 }
861
862 return 0;
863}
864
865void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
866 uint32_t nlen, const char *name)
867{
868 struct virtio_gpu_ctx_create *cmd_p;
869 struct virtio_gpu_vbuffer *vbuf;
870
871 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
872 memset(cmd_p, 0, sizeof(*cmd_p));
873
874 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_CREATE);
875 cmd_p->hdr.ctx_id = cpu_to_le32(id);
876 cmd_p->nlen = cpu_to_le32(nlen);
877 strncpy(cmd_p->debug_name, name, sizeof(cmd_p->debug_name) - 1);
878 cmd_p->debug_name[sizeof(cmd_p->debug_name) - 1] = 0;
879 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
880}
881
882void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
883 uint32_t id)
884{
885 struct virtio_gpu_ctx_destroy *cmd_p;
886 struct virtio_gpu_vbuffer *vbuf;
887
888 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
889 memset(cmd_p, 0, sizeof(*cmd_p));
890
891 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DESTROY);
892 cmd_p->hdr.ctx_id = cpu_to_le32(id);
893 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
894}
895
896void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
897 uint32_t ctx_id,
898 struct virtio_gpu_object_array *objs)
899{
900 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
901 struct virtio_gpu_ctx_resource *cmd_p;
902 struct virtio_gpu_vbuffer *vbuf;
903
904 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
905 memset(cmd_p, 0, sizeof(*cmd_p));
906 vbuf->objs = objs;
907
908 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE);
909 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
910 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
911 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
912
913}
914
915void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
916 uint32_t ctx_id,
917 struct virtio_gpu_object_array *objs)
918{
919 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
920 struct virtio_gpu_ctx_resource *cmd_p;
921 struct virtio_gpu_vbuffer *vbuf;
922
923 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
924 memset(cmd_p, 0, sizeof(*cmd_p));
925 vbuf->objs = objs;
926
927 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE);
928 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
929 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
930 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
931}
932
933void
934virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
935 struct virtio_gpu_object *bo,
936 struct virtio_gpu_object_params *params,
937 struct virtio_gpu_object_array *objs,
938 struct virtio_gpu_fence *fence)
939{
940 struct virtio_gpu_resource_create_3d *cmd_p;
941 struct virtio_gpu_vbuffer *vbuf;
942
943 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
944 memset(cmd_p, 0, sizeof(*cmd_p));
945 vbuf->objs = objs;
946
947 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_3D);
948 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
949 cmd_p->format = cpu_to_le32(params->format);
950 cmd_p->width = cpu_to_le32(params->width);
951 cmd_p->height = cpu_to_le32(params->height);
952
953 cmd_p->target = cpu_to_le32(params->target);
954 cmd_p->bind = cpu_to_le32(params->bind);
955 cmd_p->depth = cpu_to_le32(params->depth);
956 cmd_p->array_size = cpu_to_le32(params->array_size);
957 cmd_p->last_level = cpu_to_le32(params->last_level);
958 cmd_p->nr_samples = cpu_to_le32(params->nr_samples);
959 cmd_p->flags = cpu_to_le32(params->flags);
960
961 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
962 bo->created = true;
963}
964
965void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
966 uint32_t ctx_id,
967 uint64_t offset, uint32_t level,
968 struct virtio_gpu_box *box,
969 struct virtio_gpu_object_array *objs,
970 struct virtio_gpu_fence *fence)
971{
972 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
973 struct virtio_gpu_transfer_host_3d *cmd_p;
974 struct virtio_gpu_vbuffer *vbuf;
975 bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
976
977 if (use_dma_api)
978 dma_sync_sg_for_device(vgdev->vdev->dev.parent,
979 bo->pages->sgl, bo->pages->nents,
980 DMA_TO_DEVICE);
981
982 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
983 memset(cmd_p, 0, sizeof(*cmd_p));
984
985 vbuf->objs = objs;
986
987 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D);
988 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
989 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
990 cmd_p->box = *box;
991 cmd_p->offset = cpu_to_le64(offset);
992 cmd_p->level = cpu_to_le32(level);
993
994 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
995}
996
997void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
998 uint32_t ctx_id,
999 uint64_t offset, uint32_t level,
1000 struct virtio_gpu_box *box,
1001 struct virtio_gpu_object_array *objs,
1002 struct virtio_gpu_fence *fence)
1003{
1004 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
1005 struct virtio_gpu_transfer_host_3d *cmd_p;
1006 struct virtio_gpu_vbuffer *vbuf;
1007
1008 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
1009 memset(cmd_p, 0, sizeof(*cmd_p));
1010
1011 vbuf->objs = objs;
1012
1013 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D);
1014 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
1015 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
1016 cmd_p->box = *box;
1017 cmd_p->offset = cpu_to_le64(offset);
1018 cmd_p->level = cpu_to_le32(level);
1019
1020 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
1021}
1022
1023void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
1024 void *data, uint32_t data_size,
1025 uint32_t ctx_id,
1026 struct virtio_gpu_object_array *objs,
1027 struct virtio_gpu_fence *fence)
1028{
1029 struct virtio_gpu_cmd_submit *cmd_p;
1030 struct virtio_gpu_vbuffer *vbuf;
1031
1032 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
1033 memset(cmd_p, 0, sizeof(*cmd_p));
1034
1035 vbuf->data_buf = data;
1036 vbuf->data_size = data_size;
1037 vbuf->objs = objs;
1038
1039 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SUBMIT_3D);
1040 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
1041 cmd_p->size = cpu_to_le32(data_size);
1042
1043 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
1044}
1045
1046int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
1047 struct virtio_gpu_object *obj,
1048 struct virtio_gpu_fence *fence)
1049{
1050 bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
1051 struct virtio_gpu_mem_entry *ents;
1052 struct scatterlist *sg;
1053 int si, nents, ret;
1054
1055 if (WARN_ON_ONCE(!obj->created))
1056 return -EINVAL;
1057 if (WARN_ON_ONCE(obj->pages))
1058 return -EINVAL;
1059
1060 ret = drm_gem_shmem_pin(&obj->base.base);
1061 if (ret < 0)
1062 return -EINVAL;
1063
1064 obj->pages = drm_gem_shmem_get_sg_table(&obj->base.base);
1065 if (obj->pages == NULL) {
1066 drm_gem_shmem_unpin(&obj->base.base);
1067 return -EINVAL;
1068 }
1069
1070 if (use_dma_api) {
1071 obj->mapped = dma_map_sg(vgdev->vdev->dev.parent,
1072 obj->pages->sgl, obj->pages->nents,
1073 DMA_TO_DEVICE);
1074 nents = obj->mapped;
1075 } else {
1076 nents = obj->pages->nents;
1077 }
1078
1079 /* gets freed when the ring has consumed it */
1080 ents = kmalloc_array(nents, sizeof(struct virtio_gpu_mem_entry),
1081 GFP_KERNEL);
1082 if (!ents) {
1083 DRM_ERROR("failed to allocate ent list\n");
1084 return -ENOMEM;
1085 }
1086
1087 for_each_sg(obj->pages->sgl, sg, nents, si) {
1088 ents[si].addr = cpu_to_le64(use_dma_api
1089 ? sg_dma_address(sg)
1090 : sg_phys(sg));
1091 ents[si].length = cpu_to_le32(sg->length);
1092 ents[si].padding = 0;
1093 }
1094
1095 virtio_gpu_cmd_resource_attach_backing(vgdev, obj->hw_res_handle,
1096 ents, nents,
1097 fence);
1098 return 0;
1099}
1100
1101void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev,
1102 struct virtio_gpu_object *obj)
1103{
1104 bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
1105
1106 if (WARN_ON_ONCE(!obj->pages))
1107 return;
1108
1109 if (use_dma_api && obj->mapped) {
1110 struct virtio_gpu_fence *fence = virtio_gpu_fence_alloc(vgdev);
1111 /* detach backing and wait for the host process it ... */
1112 virtio_gpu_cmd_resource_inval_backing(vgdev, obj->hw_res_handle, fence);
1113 dma_fence_wait(&fence->f, true);
1114 dma_fence_put(&fence->f);
1115
1116 /* ... then tear down iommu mappings */
1117 dma_unmap_sg(vgdev->vdev->dev.parent,
1118 obj->pages->sgl, obj->mapped,
1119 DMA_TO_DEVICE);
1120 obj->mapped = 0;
1121 } else {
1122 virtio_gpu_cmd_resource_inval_backing(vgdev, obj->hw_res_handle, NULL);
1123 }
1124
1125 sg_free_table(obj->pages);
1126 obj->pages = NULL;
1127
1128 drm_gem_shmem_unpin(&obj->base.base);
1129}
1130
1131void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
1132 struct virtio_gpu_output *output)
1133{
1134 struct virtio_gpu_vbuffer *vbuf;
1135 struct virtio_gpu_update_cursor *cur_p;
1136
1137 output->cursor.pos.scanout_id = cpu_to_le32(output->index);
1138 cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);
1139 memcpy(cur_p, &output->cursor, sizeof(output->cursor));
1140 virtio_gpu_queue_cursor(vgdev, vbuf);
1141}