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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 <drm/drmP.h>
30#include "virtgpu_drv.h"
31#include <linux/virtio.h>
32#include <linux/virtio_config.h>
33#include <linux/virtio_ring.h>
34
35#define MAX_INLINE_CMD_SIZE 96
36#define MAX_INLINE_RESP_SIZE 24
37#define VBUFFER_SIZE (sizeof(struct virtio_gpu_vbuffer) \
38 + MAX_INLINE_CMD_SIZE \
39 + MAX_INLINE_RESP_SIZE)
40
41void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
42 uint32_t *resid)
43{
44 int handle;
45
46 idr_preload(GFP_KERNEL);
47 spin_lock(&vgdev->resource_idr_lock);
48 handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT);
49 spin_unlock(&vgdev->resource_idr_lock);
50 idr_preload_end();
51 *resid = handle;
52}
53
54void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
55{
56 spin_lock(&vgdev->resource_idr_lock);
57 idr_remove(&vgdev->resource_idr, id);
58 spin_unlock(&vgdev->resource_idr_lock);
59}
60
61void virtio_gpu_ctrl_ack(struct virtqueue *vq)
62{
63 struct drm_device *dev = vq->vdev->priv;
64 struct virtio_gpu_device *vgdev = dev->dev_private;
65 schedule_work(&vgdev->ctrlq.dequeue_work);
66}
67
68void virtio_gpu_cursor_ack(struct virtqueue *vq)
69{
70 struct drm_device *dev = vq->vdev->priv;
71 struct virtio_gpu_device *vgdev = dev->dev_private;
72 schedule_work(&vgdev->cursorq.dequeue_work);
73}
74
75int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)
76{
77 struct virtio_gpu_vbuffer *vbuf;
78 int i, size, count = 0;
79 void *ptr;
80
81 INIT_LIST_HEAD(&vgdev->free_vbufs);
82 spin_lock_init(&vgdev->free_vbufs_lock);
83 count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
84 count += virtqueue_get_vring_size(vgdev->cursorq.vq);
85 size = count * VBUFFER_SIZE;
86 DRM_INFO("virtio vbuffers: %d bufs, %zdB each, %dkB total.\n",
87 count, VBUFFER_SIZE, size / 1024);
88
89 vgdev->vbufs = kzalloc(size, GFP_KERNEL);
90 if (!vgdev->vbufs)
91 return -ENOMEM;
92
93 for (i = 0, ptr = vgdev->vbufs;
94 i < count;
95 i++, ptr += VBUFFER_SIZE) {
96 vbuf = ptr;
97 list_add(&vbuf->list, &vgdev->free_vbufs);
98 }
99 return 0;
100}
101
102void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
103{
104 struct virtio_gpu_vbuffer *vbuf;
105 int i, count = 0;
106
107 count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
108 count += virtqueue_get_vring_size(vgdev->cursorq.vq);
109
110 spin_lock(&vgdev->free_vbufs_lock);
111 for (i = 0; i < count; i++) {
112 if (WARN_ON(list_empty(&vgdev->free_vbufs)))
113 return;
114 vbuf = list_first_entry(&vgdev->free_vbufs,
115 struct virtio_gpu_vbuffer, list);
116 list_del(&vbuf->list);
117 }
118 spin_unlock(&vgdev->free_vbufs_lock);
119 kfree(vgdev->vbufs);
120}
121
122static struct virtio_gpu_vbuffer*
123virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,
124 int size, int resp_size, void *resp_buf,
125 virtio_gpu_resp_cb resp_cb)
126{
127 struct virtio_gpu_vbuffer *vbuf;
128
129 spin_lock(&vgdev->free_vbufs_lock);
130 BUG_ON(list_empty(&vgdev->free_vbufs));
131 vbuf = list_first_entry(&vgdev->free_vbufs,
132 struct virtio_gpu_vbuffer, list);
133 list_del(&vbuf->list);
134 spin_unlock(&vgdev->free_vbufs_lock);
135 memset(vbuf, 0, VBUFFER_SIZE);
136
137 BUG_ON(size > MAX_INLINE_CMD_SIZE);
138 vbuf->buf = (void *)vbuf + sizeof(*vbuf);
139 vbuf->size = size;
140
141 vbuf->resp_cb = resp_cb;
142 vbuf->resp_size = resp_size;
143 if (resp_size <= MAX_INLINE_RESP_SIZE)
144 vbuf->resp_buf = (void *)vbuf->buf + size;
145 else
146 vbuf->resp_buf = resp_buf;
147 BUG_ON(!vbuf->resp_buf);
148 return vbuf;
149}
150
151static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,
152 struct virtio_gpu_vbuffer **vbuffer_p,
153 int size)
154{
155 struct virtio_gpu_vbuffer *vbuf;
156
157 vbuf = virtio_gpu_get_vbuf(vgdev, size,
158 sizeof(struct virtio_gpu_ctrl_hdr),
159 NULL, NULL);
160 if (IS_ERR(vbuf)) {
161 *vbuffer_p = NULL;
162 return ERR_CAST(vbuf);
163 }
164 *vbuffer_p = vbuf;
165 return vbuf->buf;
166}
167
168static struct virtio_gpu_update_cursor*
169virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,
170 struct virtio_gpu_vbuffer **vbuffer_p)
171{
172 struct virtio_gpu_vbuffer *vbuf;
173
174 vbuf = virtio_gpu_get_vbuf
175 (vgdev, sizeof(struct virtio_gpu_update_cursor),
176 0, NULL, NULL);
177 if (IS_ERR(vbuf)) {
178 *vbuffer_p = NULL;
179 return ERR_CAST(vbuf);
180 }
181 *vbuffer_p = vbuf;
182 return (struct virtio_gpu_update_cursor *)vbuf->buf;
183}
184
185static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,
186 virtio_gpu_resp_cb cb,
187 struct virtio_gpu_vbuffer **vbuffer_p,
188 int cmd_size, int resp_size,
189 void *resp_buf)
190{
191 struct virtio_gpu_vbuffer *vbuf;
192
193 vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,
194 resp_size, resp_buf, cb);
195 if (IS_ERR(vbuf)) {
196 *vbuffer_p = NULL;
197 return ERR_CAST(vbuf);
198 }
199 *vbuffer_p = vbuf;
200 return (struct virtio_gpu_command *)vbuf->buf;
201}
202
203static void free_vbuf(struct virtio_gpu_device *vgdev,
204 struct virtio_gpu_vbuffer *vbuf)
205{
206 if (vbuf->resp_size > MAX_INLINE_RESP_SIZE)
207 kfree(vbuf->resp_buf);
208 kfree(vbuf->data_buf);
209 spin_lock(&vgdev->free_vbufs_lock);
210 list_add(&vbuf->list, &vgdev->free_vbufs);
211 spin_unlock(&vgdev->free_vbufs_lock);
212}
213
214static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)
215{
216 struct virtio_gpu_vbuffer *vbuf;
217 unsigned int len;
218 int freed = 0;
219
220 while ((vbuf = virtqueue_get_buf(vq, &len))) {
221 list_add_tail(&vbuf->list, reclaim_list);
222 freed++;
223 }
224 if (freed == 0)
225 DRM_DEBUG("Huh? zero vbufs reclaimed");
226}
227
228void virtio_gpu_dequeue_ctrl_func(struct work_struct *work)
229{
230 struct virtio_gpu_device *vgdev =
231 container_of(work, struct virtio_gpu_device,
232 ctrlq.dequeue_work);
233 struct list_head reclaim_list;
234 struct virtio_gpu_vbuffer *entry, *tmp;
235 struct virtio_gpu_ctrl_hdr *resp;
236 u64 fence_id = 0;
237
238 INIT_LIST_HEAD(&reclaim_list);
239 spin_lock(&vgdev->ctrlq.qlock);
240 do {
241 virtqueue_disable_cb(vgdev->ctrlq.vq);
242 reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);
243
244 } while (!virtqueue_enable_cb(vgdev->ctrlq.vq));
245 spin_unlock(&vgdev->ctrlq.qlock);
246
247 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
248 resp = (struct virtio_gpu_ctrl_hdr *)entry->resp_buf;
249 if (resp->type != cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA))
250 DRM_DEBUG("response 0x%x\n", le32_to_cpu(resp->type));
251 if (resp->flags & cpu_to_le32(VIRTIO_GPU_FLAG_FENCE)) {
252 u64 f = le64_to_cpu(resp->fence_id);
253
254 if (fence_id > f) {
255 DRM_ERROR("%s: Oops: fence %llx -> %llx\n",
256 __func__, fence_id, f);
257 } else {
258 fence_id = f;
259 }
260 }
261 if (entry->resp_cb)
262 entry->resp_cb(vgdev, entry);
263
264 list_del(&entry->list);
265 free_vbuf(vgdev, entry);
266 }
267 wake_up(&vgdev->ctrlq.ack_queue);
268
269 if (fence_id)
270 virtio_gpu_fence_event_process(vgdev, fence_id);
271}
272
273void virtio_gpu_dequeue_cursor_func(struct work_struct *work)
274{
275 struct virtio_gpu_device *vgdev =
276 container_of(work, struct virtio_gpu_device,
277 cursorq.dequeue_work);
278 struct list_head reclaim_list;
279 struct virtio_gpu_vbuffer *entry, *tmp;
280
281 INIT_LIST_HEAD(&reclaim_list);
282 spin_lock(&vgdev->cursorq.qlock);
283 do {
284 virtqueue_disable_cb(vgdev->cursorq.vq);
285 reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);
286 } while (!virtqueue_enable_cb(vgdev->cursorq.vq));
287 spin_unlock(&vgdev->cursorq.qlock);
288
289 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
290 list_del(&entry->list);
291 free_vbuf(vgdev, entry);
292 }
293 wake_up(&vgdev->cursorq.ack_queue);
294}
295
296static int virtio_gpu_queue_ctrl_buffer_locked(struct virtio_gpu_device *vgdev,
297 struct virtio_gpu_vbuffer *vbuf)
298{
299 struct virtqueue *vq = vgdev->ctrlq.vq;
300 struct scatterlist *sgs[3], vcmd, vout, vresp;
301 int outcnt = 0, incnt = 0;
302 int ret;
303
304 if (!vgdev->vqs_ready)
305 return -ENODEV;
306
307 sg_init_one(&vcmd, vbuf->buf, vbuf->size);
308 sgs[outcnt+incnt] = &vcmd;
309 outcnt++;
310
311 if (vbuf->data_size) {
312 sg_init_one(&vout, vbuf->data_buf, vbuf->data_size);
313 sgs[outcnt + incnt] = &vout;
314 outcnt++;
315 }
316
317 if (vbuf->resp_size) {
318 sg_init_one(&vresp, vbuf->resp_buf, vbuf->resp_size);
319 sgs[outcnt + incnt] = &vresp;
320 incnt++;
321 }
322
323retry:
324 ret = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC);
325 if (ret == -ENOSPC) {
326 spin_unlock(&vgdev->ctrlq.qlock);
327 wait_event(vgdev->ctrlq.ack_queue, vq->num_free);
328 spin_lock(&vgdev->ctrlq.qlock);
329 goto retry;
330 } else {
331 virtqueue_kick(vq);
332 }
333
334 if (!ret)
335 ret = vq->num_free;
336 return ret;
337}
338
339static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,
340 struct virtio_gpu_vbuffer *vbuf)
341{
342 int rc;
343
344 spin_lock(&vgdev->ctrlq.qlock);
345 rc = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf);
346 spin_unlock(&vgdev->ctrlq.qlock);
347 return rc;
348}
349
350static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
351 struct virtio_gpu_vbuffer *vbuf,
352 struct virtio_gpu_ctrl_hdr *hdr,
353 struct virtio_gpu_fence **fence)
354{
355 struct virtqueue *vq = vgdev->ctrlq.vq;
356 int rc;
357
358again:
359 spin_lock(&vgdev->ctrlq.qlock);
360
361 /*
362 * Make sure we have enouth space in the virtqueue. If not
363 * wait here until we have.
364 *
365 * Without that virtio_gpu_queue_ctrl_buffer_nolock might have
366 * to wait for free space, which can result in fence ids being
367 * submitted out-of-order.
368 */
369 if (vq->num_free < 3) {
370 spin_unlock(&vgdev->ctrlq.qlock);
371 wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= 3);
372 goto again;
373 }
374
375 if (fence)
376 virtio_gpu_fence_emit(vgdev, hdr, fence);
377 rc = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf);
378 spin_unlock(&vgdev->ctrlq.qlock);
379 return rc;
380}
381
382static int virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,
383 struct virtio_gpu_vbuffer *vbuf)
384{
385 struct virtqueue *vq = vgdev->cursorq.vq;
386 struct scatterlist *sgs[1], ccmd;
387 int ret;
388 int outcnt;
389
390 if (!vgdev->vqs_ready)
391 return -ENODEV;
392
393 sg_init_one(&ccmd, vbuf->buf, vbuf->size);
394 sgs[0] = &ccmd;
395 outcnt = 1;
396
397 spin_lock(&vgdev->cursorq.qlock);
398retry:
399 ret = virtqueue_add_sgs(vq, sgs, outcnt, 0, vbuf, GFP_ATOMIC);
400 if (ret == -ENOSPC) {
401 spin_unlock(&vgdev->cursorq.qlock);
402 wait_event(vgdev->cursorq.ack_queue, vq->num_free);
403 spin_lock(&vgdev->cursorq.qlock);
404 goto retry;
405 } else {
406 virtqueue_kick(vq);
407 }
408
409 spin_unlock(&vgdev->cursorq.qlock);
410
411 if (!ret)
412 ret = vq->num_free;
413 return ret;
414}
415
416/* just create gem objects for userspace and long lived objects,
417 just use dma_alloced pages for the queue objects? */
418
419/* create a basic resource */
420void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
421 uint32_t resource_id,
422 uint32_t format,
423 uint32_t width,
424 uint32_t height)
425{
426 struct virtio_gpu_resource_create_2d *cmd_p;
427 struct virtio_gpu_vbuffer *vbuf;
428
429 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
430 memset(cmd_p, 0, sizeof(*cmd_p));
431
432 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_2D);
433 cmd_p->resource_id = cpu_to_le32(resource_id);
434 cmd_p->format = cpu_to_le32(format);
435 cmd_p->width = cpu_to_le32(width);
436 cmd_p->height = cpu_to_le32(height);
437
438 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
439}
440
441void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
442 uint32_t resource_id)
443{
444 struct virtio_gpu_resource_unref *cmd_p;
445 struct virtio_gpu_vbuffer *vbuf;
446
447 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
448 memset(cmd_p, 0, sizeof(*cmd_p));
449
450 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_UNREF);
451 cmd_p->resource_id = cpu_to_le32(resource_id);
452
453 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
454}
455
456void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
457 uint32_t resource_id)
458{
459 struct virtio_gpu_resource_detach_backing *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
465 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING);
466 cmd_p->resource_id = cpu_to_le32(resource_id);
467
468 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
469}
470
471void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
472 uint32_t scanout_id, uint32_t resource_id,
473 uint32_t width, uint32_t height,
474 uint32_t x, uint32_t y)
475{
476 struct virtio_gpu_set_scanout *cmd_p;
477 struct virtio_gpu_vbuffer *vbuf;
478
479 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
480 memset(cmd_p, 0, sizeof(*cmd_p));
481
482 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SET_SCANOUT);
483 cmd_p->resource_id = cpu_to_le32(resource_id);
484 cmd_p->scanout_id = cpu_to_le32(scanout_id);
485 cmd_p->r.width = cpu_to_le32(width);
486 cmd_p->r.height = cpu_to_le32(height);
487 cmd_p->r.x = cpu_to_le32(x);
488 cmd_p->r.y = cpu_to_le32(y);
489
490 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
491}
492
493void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
494 uint32_t resource_id,
495 uint32_t x, uint32_t y,
496 uint32_t width, uint32_t height)
497{
498 struct virtio_gpu_resource_flush *cmd_p;
499 struct virtio_gpu_vbuffer *vbuf;
500
501 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
502 memset(cmd_p, 0, sizeof(*cmd_p));
503
504 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_FLUSH);
505 cmd_p->resource_id = cpu_to_le32(resource_id);
506 cmd_p->r.width = cpu_to_le32(width);
507 cmd_p->r.height = cpu_to_le32(height);
508 cmd_p->r.x = cpu_to_le32(x);
509 cmd_p->r.y = cpu_to_le32(y);
510
511 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
512}
513
514void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
515 uint32_t resource_id, uint64_t offset,
516 __le32 width, __le32 height,
517 __le32 x, __le32 y,
518 struct virtio_gpu_fence **fence)
519{
520 struct virtio_gpu_transfer_to_host_2d *cmd_p;
521 struct virtio_gpu_vbuffer *vbuf;
522
523 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
524 memset(cmd_p, 0, sizeof(*cmd_p));
525
526 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D);
527 cmd_p->resource_id = cpu_to_le32(resource_id);
528 cmd_p->offset = cpu_to_le64(offset);
529 cmd_p->r.width = width;
530 cmd_p->r.height = height;
531 cmd_p->r.x = x;
532 cmd_p->r.y = y;
533
534 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
535}
536
537static void
538virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,
539 uint32_t resource_id,
540 struct virtio_gpu_mem_entry *ents,
541 uint32_t nents,
542 struct virtio_gpu_fence **fence)
543{
544 struct virtio_gpu_resource_attach_backing *cmd_p;
545 struct virtio_gpu_vbuffer *vbuf;
546
547 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
548 memset(cmd_p, 0, sizeof(*cmd_p));
549
550 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING);
551 cmd_p->resource_id = cpu_to_le32(resource_id);
552 cmd_p->nr_entries = cpu_to_le32(nents);
553
554 vbuf->data_buf = ents;
555 vbuf->data_size = sizeof(*ents) * nents;
556
557 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
558}
559
560static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,
561 struct virtio_gpu_vbuffer *vbuf)
562{
563 struct virtio_gpu_resp_display_info *resp =
564 (struct virtio_gpu_resp_display_info *)vbuf->resp_buf;
565 int i;
566
567 spin_lock(&vgdev->display_info_lock);
568 for (i = 0; i < vgdev->num_scanouts; i++) {
569 vgdev->outputs[i].info = resp->pmodes[i];
570 if (resp->pmodes[i].enabled) {
571 DRM_DEBUG("output %d: %dx%d+%d+%d", i,
572 le32_to_cpu(resp->pmodes[i].r.width),
573 le32_to_cpu(resp->pmodes[i].r.height),
574 le32_to_cpu(resp->pmodes[i].r.x),
575 le32_to_cpu(resp->pmodes[i].r.y));
576 } else {
577 DRM_DEBUG("output %d: disabled", i);
578 }
579 }
580
581 vgdev->display_info_pending = false;
582 spin_unlock(&vgdev->display_info_lock);
583 wake_up(&vgdev->resp_wq);
584
585 if (!drm_helper_hpd_irq_event(vgdev->ddev))
586 drm_kms_helper_hotplug_event(vgdev->ddev);
587}
588
589static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,
590 struct virtio_gpu_vbuffer *vbuf)
591{
592 struct virtio_gpu_get_capset_info *cmd =
593 (struct virtio_gpu_get_capset_info *)vbuf->buf;
594 struct virtio_gpu_resp_capset_info *resp =
595 (struct virtio_gpu_resp_capset_info *)vbuf->resp_buf;
596 int i = le32_to_cpu(cmd->capset_index);
597
598 spin_lock(&vgdev->display_info_lock);
599 vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);
600 vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);
601 vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);
602 spin_unlock(&vgdev->display_info_lock);
603 wake_up(&vgdev->resp_wq);
604}
605
606static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,
607 struct virtio_gpu_vbuffer *vbuf)
608{
609 struct virtio_gpu_get_capset *cmd =
610 (struct virtio_gpu_get_capset *)vbuf->buf;
611 struct virtio_gpu_resp_capset *resp =
612 (struct virtio_gpu_resp_capset *)vbuf->resp_buf;
613 struct virtio_gpu_drv_cap_cache *cache_ent;
614
615 spin_lock(&vgdev->display_info_lock);
616 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
617 if (cache_ent->version == le32_to_cpu(cmd->capset_version) &&
618 cache_ent->id == le32_to_cpu(cmd->capset_id)) {
619 memcpy(cache_ent->caps_cache, resp->capset_data,
620 cache_ent->size);
621 atomic_set(&cache_ent->is_valid, 1);
622 break;
623 }
624 }
625 spin_unlock(&vgdev->display_info_lock);
626 wake_up(&vgdev->resp_wq);
627}
628
629
630int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)
631{
632 struct virtio_gpu_ctrl_hdr *cmd_p;
633 struct virtio_gpu_vbuffer *vbuf;
634 void *resp_buf;
635
636 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_display_info),
637 GFP_KERNEL);
638 if (!resp_buf)
639 return -ENOMEM;
640
641 cmd_p = virtio_gpu_alloc_cmd_resp
642 (vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,
643 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_display_info),
644 resp_buf);
645 memset(cmd_p, 0, sizeof(*cmd_p));
646
647 vgdev->display_info_pending = true;
648 cmd_p->type = cpu_to_le32(VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
649 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
650 return 0;
651}
652
653int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)
654{
655 struct virtio_gpu_get_capset_info *cmd_p;
656 struct virtio_gpu_vbuffer *vbuf;
657 void *resp_buf;
658
659 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset_info),
660 GFP_KERNEL);
661 if (!resp_buf)
662 return -ENOMEM;
663
664 cmd_p = virtio_gpu_alloc_cmd_resp
665 (vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,
666 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_capset_info),
667 resp_buf);
668 memset(cmd_p, 0, sizeof(*cmd_p));
669
670 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET_INFO);
671 cmd_p->capset_index = cpu_to_le32(idx);
672 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
673 return 0;
674}
675
676int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
677 int idx, int version,
678 struct virtio_gpu_drv_cap_cache **cache_p)
679{
680 struct virtio_gpu_get_capset *cmd_p;
681 struct virtio_gpu_vbuffer *vbuf;
682 int max_size = vgdev->capsets[idx].max_size;
683 struct virtio_gpu_drv_cap_cache *cache_ent;
684 void *resp_buf;
685
686 if (idx > vgdev->num_capsets)
687 return -EINVAL;
688
689 if (version > vgdev->capsets[idx].max_version)
690 return -EINVAL;
691
692 cache_ent = kzalloc(sizeof(*cache_ent), GFP_KERNEL);
693 if (!cache_ent)
694 return -ENOMEM;
695
696 cache_ent->caps_cache = kmalloc(max_size, GFP_KERNEL);
697 if (!cache_ent->caps_cache) {
698 kfree(cache_ent);
699 return -ENOMEM;
700 }
701
702 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset) + max_size,
703 GFP_KERNEL);
704 if (!resp_buf) {
705 kfree(cache_ent->caps_cache);
706 kfree(cache_ent);
707 return -ENOMEM;
708 }
709
710 cache_ent->version = version;
711 cache_ent->id = vgdev->capsets[idx].id;
712 atomic_set(&cache_ent->is_valid, 0);
713 cache_ent->size = max_size;
714 spin_lock(&vgdev->display_info_lock);
715 list_add_tail(&cache_ent->head, &vgdev->cap_cache);
716 spin_unlock(&vgdev->display_info_lock);
717
718 cmd_p = virtio_gpu_alloc_cmd_resp
719 (vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),
720 sizeof(struct virtio_gpu_resp_capset) + max_size,
721 resp_buf);
722 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET);
723 cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);
724 cmd_p->capset_version = cpu_to_le32(version);
725 *cache_p = cache_ent;
726 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
727
728 return 0;
729}
730
731void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
732 uint32_t nlen, const char *name)
733{
734 struct virtio_gpu_ctx_create *cmd_p;
735 struct virtio_gpu_vbuffer *vbuf;
736
737 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
738 memset(cmd_p, 0, sizeof(*cmd_p));
739
740 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_CREATE);
741 cmd_p->hdr.ctx_id = cpu_to_le32(id);
742 cmd_p->nlen = cpu_to_le32(nlen);
743 strncpy(cmd_p->debug_name, name, sizeof(cmd_p->debug_name)-1);
744 cmd_p->debug_name[sizeof(cmd_p->debug_name)-1] = 0;
745 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
746}
747
748void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
749 uint32_t id)
750{
751 struct virtio_gpu_ctx_destroy *cmd_p;
752 struct virtio_gpu_vbuffer *vbuf;
753
754 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
755 memset(cmd_p, 0, sizeof(*cmd_p));
756
757 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DESTROY);
758 cmd_p->hdr.ctx_id = cpu_to_le32(id);
759 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
760}
761
762void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
763 uint32_t ctx_id,
764 uint32_t resource_id)
765{
766 struct virtio_gpu_ctx_resource *cmd_p;
767 struct virtio_gpu_vbuffer *vbuf;
768
769 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
770 memset(cmd_p, 0, sizeof(*cmd_p));
771
772 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE);
773 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
774 cmd_p->resource_id = cpu_to_le32(resource_id);
775 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
776
777}
778
779void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
780 uint32_t ctx_id,
781 uint32_t resource_id)
782{
783 struct virtio_gpu_ctx_resource *cmd_p;
784 struct virtio_gpu_vbuffer *vbuf;
785
786 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
787 memset(cmd_p, 0, sizeof(*cmd_p));
788
789 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE);
790 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
791 cmd_p->resource_id = cpu_to_le32(resource_id);
792 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
793}
794
795void
796virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
797 struct virtio_gpu_resource_create_3d *rc_3d,
798 struct virtio_gpu_fence **fence)
799{
800 struct virtio_gpu_resource_create_3d *cmd_p;
801 struct virtio_gpu_vbuffer *vbuf;
802
803 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
804 memset(cmd_p, 0, sizeof(*cmd_p));
805
806 *cmd_p = *rc_3d;
807 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_3D);
808 cmd_p->hdr.flags = 0;
809
810 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
811}
812
813void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
814 uint32_t resource_id, uint32_t ctx_id,
815 uint64_t offset, uint32_t level,
816 struct virtio_gpu_box *box,
817 struct virtio_gpu_fence **fence)
818{
819 struct virtio_gpu_transfer_host_3d *cmd_p;
820 struct virtio_gpu_vbuffer *vbuf;
821
822 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
823 memset(cmd_p, 0, sizeof(*cmd_p));
824
825 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D);
826 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
827 cmd_p->resource_id = cpu_to_le32(resource_id);
828 cmd_p->box = *box;
829 cmd_p->offset = cpu_to_le64(offset);
830 cmd_p->level = cpu_to_le32(level);
831
832 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
833}
834
835void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
836 uint32_t resource_id, uint32_t ctx_id,
837 uint64_t offset, uint32_t level,
838 struct virtio_gpu_box *box,
839 struct virtio_gpu_fence **fence)
840{
841 struct virtio_gpu_transfer_host_3d *cmd_p;
842 struct virtio_gpu_vbuffer *vbuf;
843
844 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
845 memset(cmd_p, 0, sizeof(*cmd_p));
846
847 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D);
848 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
849 cmd_p->resource_id = cpu_to_le32(resource_id);
850 cmd_p->box = *box;
851 cmd_p->offset = cpu_to_le64(offset);
852 cmd_p->level = cpu_to_le32(level);
853
854 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
855}
856
857void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
858 void *data, uint32_t data_size,
859 uint32_t ctx_id, struct virtio_gpu_fence **fence)
860{
861 struct virtio_gpu_cmd_submit *cmd_p;
862 struct virtio_gpu_vbuffer *vbuf;
863
864 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
865 memset(cmd_p, 0, sizeof(*cmd_p));
866
867 vbuf->data_buf = data;
868 vbuf->data_size = data_size;
869
870 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SUBMIT_3D);
871 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
872 cmd_p->size = cpu_to_le32(data_size);
873
874 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
875}
876
877int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
878 struct virtio_gpu_object *obj,
879 uint32_t resource_id,
880 struct virtio_gpu_fence **fence)
881{
882 struct virtio_gpu_mem_entry *ents;
883 struct scatterlist *sg;
884 int si;
885
886 if (!obj->pages) {
887 int ret;
888 ret = virtio_gpu_object_get_sg_table(vgdev, obj);
889 if (ret)
890 return ret;
891 }
892
893 /* gets freed when the ring has consumed it */
894 ents = kmalloc_array(obj->pages->nents,
895 sizeof(struct virtio_gpu_mem_entry),
896 GFP_KERNEL);
897 if (!ents) {
898 DRM_ERROR("failed to allocate ent list\n");
899 return -ENOMEM;
900 }
901
902 for_each_sg(obj->pages->sgl, sg, obj->pages->nents, si) {
903 ents[si].addr = cpu_to_le64(sg_phys(sg));
904 ents[si].length = cpu_to_le32(sg->length);
905 ents[si].padding = 0;
906 }
907
908 virtio_gpu_cmd_resource_attach_backing(vgdev, resource_id,
909 ents, obj->pages->nents,
910 fence);
911 obj->hw_res_handle = resource_id;
912 return 0;
913}
914
915void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
916 struct virtio_gpu_output *output)
917{
918 struct virtio_gpu_vbuffer *vbuf;
919 struct virtio_gpu_update_cursor *cur_p;
920
921 output->cursor.pos.scanout_id = cpu_to_le32(output->index);
922 cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);
923 memcpy(cur_p, &output->cursor, sizeof(output->cursor));
924 virtio_gpu_queue_cursor(vgdev, vbuf);
925}