2 * Copyright (C) 2015 Red Hat, Inc.
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:
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
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.
29 #include <linux/dma-mapping.h>
30 #include <linux/virtio.h>
31 #include <linux/virtio_config.h>
32 #include <linux/virtio_ring.h>
34 #include "virtgpu_drv.h"
35 #include "virtgpu_trace.h"
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)
43 static void convert_to_hw_box(struct virtio_gpu_box *dst,
44 const struct drm_virtgpu_3d_box *src)
46 dst->x = cpu_to_le32(src->x);
47 dst->y = cpu_to_le32(src->y);
48 dst->z = cpu_to_le32(src->z);
49 dst->w = cpu_to_le32(src->w);
50 dst->h = cpu_to_le32(src->h);
51 dst->d = cpu_to_le32(src->d);
54 void virtio_gpu_ctrl_ack(struct virtqueue *vq)
56 struct drm_device *dev = vq->vdev->priv;
57 struct virtio_gpu_device *vgdev = dev->dev_private;
59 schedule_work(&vgdev->ctrlq.dequeue_work);
62 void virtio_gpu_cursor_ack(struct virtqueue *vq)
64 struct drm_device *dev = vq->vdev->priv;
65 struct virtio_gpu_device *vgdev = dev->dev_private;
67 schedule_work(&vgdev->cursorq.dequeue_work);
70 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)
72 vgdev->vbufs = kmem_cache_create("virtio-gpu-vbufs",
74 __alignof__(struct virtio_gpu_vbuffer),
81 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
83 kmem_cache_destroy(vgdev->vbufs);
87 static struct virtio_gpu_vbuffer*
88 virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,
89 int size, int resp_size, void *resp_buf,
90 virtio_gpu_resp_cb resp_cb)
92 struct virtio_gpu_vbuffer *vbuf;
94 vbuf = kmem_cache_zalloc(vgdev->vbufs, GFP_KERNEL);
96 return ERR_PTR(-ENOMEM);
98 BUG_ON(size > MAX_INLINE_CMD_SIZE ||
99 size < sizeof(struct virtio_gpu_ctrl_hdr));
100 vbuf->buf = (void *)vbuf + sizeof(*vbuf);
103 vbuf->resp_cb = resp_cb;
104 vbuf->resp_size = resp_size;
105 if (resp_size <= MAX_INLINE_RESP_SIZE)
106 vbuf->resp_buf = (void *)vbuf->buf + size;
108 vbuf->resp_buf = resp_buf;
109 BUG_ON(!vbuf->resp_buf);
113 static struct virtio_gpu_ctrl_hdr *
114 virtio_gpu_vbuf_ctrl_hdr(struct virtio_gpu_vbuffer *vbuf)
116 /* this assumes a vbuf contains a command that starts with a
117 * virtio_gpu_ctrl_hdr, which is true for both ctrl and cursor
120 return (struct virtio_gpu_ctrl_hdr *)vbuf->buf;
123 static struct virtio_gpu_update_cursor*
124 virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,
125 struct virtio_gpu_vbuffer **vbuffer_p)
127 struct virtio_gpu_vbuffer *vbuf;
129 vbuf = virtio_gpu_get_vbuf
130 (vgdev, sizeof(struct virtio_gpu_update_cursor),
134 return ERR_CAST(vbuf);
137 return (struct virtio_gpu_update_cursor *)vbuf->buf;
140 static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,
141 virtio_gpu_resp_cb cb,
142 struct virtio_gpu_vbuffer **vbuffer_p,
143 int cmd_size, int resp_size,
146 struct virtio_gpu_vbuffer *vbuf;
148 vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,
149 resp_size, resp_buf, cb);
152 return ERR_CAST(vbuf);
155 return (struct virtio_gpu_command *)vbuf->buf;
158 static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,
159 struct virtio_gpu_vbuffer **vbuffer_p,
162 return virtio_gpu_alloc_cmd_resp(vgdev, NULL, vbuffer_p, size,
163 sizeof(struct virtio_gpu_ctrl_hdr),
167 static void *virtio_gpu_alloc_cmd_cb(struct virtio_gpu_device *vgdev,
168 struct virtio_gpu_vbuffer **vbuffer_p,
170 virtio_gpu_resp_cb cb)
172 return virtio_gpu_alloc_cmd_resp(vgdev, cb, vbuffer_p, size,
173 sizeof(struct virtio_gpu_ctrl_hdr),
177 static void free_vbuf(struct virtio_gpu_device *vgdev,
178 struct virtio_gpu_vbuffer *vbuf)
180 if (vbuf->resp_size > MAX_INLINE_RESP_SIZE)
181 kfree(vbuf->resp_buf);
182 kvfree(vbuf->data_buf);
183 kmem_cache_free(vgdev->vbufs, vbuf);
186 static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)
188 struct virtio_gpu_vbuffer *vbuf;
192 while ((vbuf = virtqueue_get_buf(vq, &len))) {
193 list_add_tail(&vbuf->list, reclaim_list);
197 DRM_DEBUG("Huh? zero vbufs reclaimed");
200 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work)
202 struct virtio_gpu_device *vgdev =
203 container_of(work, struct virtio_gpu_device,
205 struct list_head reclaim_list;
206 struct virtio_gpu_vbuffer *entry, *tmp;
207 struct virtio_gpu_ctrl_hdr *resp;
210 INIT_LIST_HEAD(&reclaim_list);
211 spin_lock(&vgdev->ctrlq.qlock);
213 virtqueue_disable_cb(vgdev->ctrlq.vq);
214 reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);
216 } while (!virtqueue_enable_cb(vgdev->ctrlq.vq));
217 spin_unlock(&vgdev->ctrlq.qlock);
219 list_for_each_entry(entry, &reclaim_list, list) {
220 resp = (struct virtio_gpu_ctrl_hdr *)entry->resp_buf;
222 trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp);
224 if (resp->type != cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA)) {
225 if (le32_to_cpu(resp->type) >= VIRTIO_GPU_RESP_ERR_UNSPEC) {
226 struct virtio_gpu_ctrl_hdr *cmd;
227 cmd = virtio_gpu_vbuf_ctrl_hdr(entry);
228 DRM_ERROR_RATELIMITED("response 0x%x (command 0x%x)\n",
229 le32_to_cpu(resp->type),
230 le32_to_cpu(cmd->type));
232 DRM_DEBUG("response 0x%x\n", le32_to_cpu(resp->type));
234 if (resp->flags & cpu_to_le32(VIRTIO_GPU_FLAG_FENCE)) {
235 u64 f = le64_to_cpu(resp->fence_id);
238 DRM_ERROR("%s: Oops: fence %llx -> %llx\n",
239 __func__, fence_id, f);
245 entry->resp_cb(vgdev, entry);
247 wake_up(&vgdev->ctrlq.ack_queue);
250 virtio_gpu_fence_event_process(vgdev, fence_id);
252 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
254 virtio_gpu_array_put_free_delayed(vgdev, entry->objs);
255 list_del(&entry->list);
256 free_vbuf(vgdev, entry);
260 void virtio_gpu_dequeue_cursor_func(struct work_struct *work)
262 struct virtio_gpu_device *vgdev =
263 container_of(work, struct virtio_gpu_device,
264 cursorq.dequeue_work);
265 struct list_head reclaim_list;
266 struct virtio_gpu_vbuffer *entry, *tmp;
268 INIT_LIST_HEAD(&reclaim_list);
269 spin_lock(&vgdev->cursorq.qlock);
271 virtqueue_disable_cb(vgdev->cursorq.vq);
272 reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);
273 } while (!virtqueue_enable_cb(vgdev->cursorq.vq));
274 spin_unlock(&vgdev->cursorq.qlock);
276 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
277 list_del(&entry->list);
278 free_vbuf(vgdev, entry);
280 wake_up(&vgdev->cursorq.ack_queue);
283 /* Create sg_table from a vmalloc'd buffer. */
284 static struct sg_table *vmalloc_to_sgt(char *data, uint32_t size, int *sg_ents)
287 struct sg_table *sgt;
288 struct scatterlist *sg;
291 if (WARN_ON(!PAGE_ALIGNED(data)))
294 sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
298 *sg_ents = DIV_ROUND_UP(size, PAGE_SIZE);
299 ret = sg_alloc_table(sgt, *sg_ents, GFP_KERNEL);
305 for_each_sg(sgt->sgl, sg, *sg_ents, i) {
306 pg = vmalloc_to_page(data);
313 s = min_t(int, PAGE_SIZE, size);
314 sg_set_page(sg, pg, s, 0);
323 static void virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,
324 struct virtio_gpu_vbuffer *vbuf,
325 struct virtio_gpu_fence *fence,
327 struct scatterlist **sgs,
331 struct virtqueue *vq = vgdev->ctrlq.vq;
334 if (!drm_dev_enter(vgdev->ddev, &idx)) {
335 if (fence && vbuf->objs)
336 virtio_gpu_array_unlock_resv(vbuf->objs);
337 free_vbuf(vgdev, vbuf);
341 if (vgdev->has_indirect)
345 spin_lock(&vgdev->ctrlq.qlock);
347 if (vq->num_free < elemcnt) {
348 spin_unlock(&vgdev->ctrlq.qlock);
349 virtio_gpu_notify(vgdev);
350 wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt);
354 /* now that the position of the vbuf in the virtqueue is known, we can
355 * finally set the fence id
358 virtio_gpu_fence_emit(vgdev, virtio_gpu_vbuf_ctrl_hdr(vbuf),
361 virtio_gpu_array_add_fence(vbuf->objs, &fence->f);
362 virtio_gpu_array_unlock_resv(vbuf->objs);
366 ret = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC);
369 trace_virtio_gpu_cmd_queue(vq, virtio_gpu_vbuf_ctrl_hdr(vbuf));
371 atomic_inc(&vgdev->pending_commands);
373 spin_unlock(&vgdev->ctrlq.qlock);
378 static void virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
379 struct virtio_gpu_vbuffer *vbuf,
380 struct virtio_gpu_fence *fence)
382 struct scatterlist *sgs[3], vcmd, vout, vresp;
383 struct sg_table *sgt = NULL;
384 int elemcnt = 0, outcnt = 0, incnt = 0;
387 sg_init_one(&vcmd, vbuf->buf, vbuf->size);
393 if (vbuf->data_size) {
394 if (is_vmalloc_addr(vbuf->data_buf)) {
396 sgt = vmalloc_to_sgt(vbuf->data_buf, vbuf->data_size,
399 if (fence && vbuf->objs)
400 virtio_gpu_array_unlock_resv(vbuf->objs);
405 sgs[outcnt] = sgt->sgl;
407 sg_init_one(&vout, vbuf->data_buf, vbuf->data_size);
415 if (vbuf->resp_size) {
416 sg_init_one(&vresp, vbuf->resp_buf, vbuf->resp_size);
418 sgs[outcnt + incnt] = &vresp;
422 virtio_gpu_queue_ctrl_sgs(vgdev, vbuf, fence, elemcnt, sgs, outcnt,
431 void virtio_gpu_notify(struct virtio_gpu_device *vgdev)
435 if (!atomic_read(&vgdev->pending_commands))
438 spin_lock(&vgdev->ctrlq.qlock);
439 atomic_set(&vgdev->pending_commands, 0);
440 notify = virtqueue_kick_prepare(vgdev->ctrlq.vq);
441 spin_unlock(&vgdev->ctrlq.qlock);
444 virtqueue_notify(vgdev->ctrlq.vq);
447 static void virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,
448 struct virtio_gpu_vbuffer *vbuf)
450 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, NULL);
453 static void virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,
454 struct virtio_gpu_vbuffer *vbuf)
456 struct virtqueue *vq = vgdev->cursorq.vq;
457 struct scatterlist *sgs[1], ccmd;
458 int idx, ret, outcnt;
461 if (!drm_dev_enter(vgdev->ddev, &idx)) {
462 free_vbuf(vgdev, vbuf);
466 sg_init_one(&ccmd, vbuf->buf, vbuf->size);
470 spin_lock(&vgdev->cursorq.qlock);
472 ret = virtqueue_add_sgs(vq, sgs, outcnt, 0, vbuf, GFP_ATOMIC);
473 if (ret == -ENOSPC) {
474 spin_unlock(&vgdev->cursorq.qlock);
475 wait_event(vgdev->cursorq.ack_queue, vq->num_free >= outcnt);
476 spin_lock(&vgdev->cursorq.qlock);
479 trace_virtio_gpu_cmd_queue(vq,
480 virtio_gpu_vbuf_ctrl_hdr(vbuf));
482 notify = virtqueue_kick_prepare(vq);
485 spin_unlock(&vgdev->cursorq.qlock);
488 virtqueue_notify(vq);
493 /* just create gem objects for userspace and long lived objects,
494 * just use dma_alloced pages for the queue objects?
497 /* create a basic resource */
498 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
499 struct virtio_gpu_object *bo,
500 struct virtio_gpu_object_params *params,
501 struct virtio_gpu_object_array *objs,
502 struct virtio_gpu_fence *fence)
504 struct virtio_gpu_resource_create_2d *cmd_p;
505 struct virtio_gpu_vbuffer *vbuf;
507 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
508 memset(cmd_p, 0, sizeof(*cmd_p));
511 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_2D);
512 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
513 cmd_p->format = cpu_to_le32(params->format);
514 cmd_p->width = cpu_to_le32(params->width);
515 cmd_p->height = cpu_to_le32(params->height);
517 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
521 static void virtio_gpu_cmd_unref_cb(struct virtio_gpu_device *vgdev,
522 struct virtio_gpu_vbuffer *vbuf)
524 struct virtio_gpu_object *bo;
526 bo = vbuf->resp_cb_data;
527 vbuf->resp_cb_data = NULL;
529 virtio_gpu_cleanup_object(bo);
532 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
533 struct virtio_gpu_object *bo)
535 struct virtio_gpu_resource_unref *cmd_p;
536 struct virtio_gpu_vbuffer *vbuf;
538 cmd_p = virtio_gpu_alloc_cmd_cb(vgdev, &vbuf, sizeof(*cmd_p),
539 virtio_gpu_cmd_unref_cb);
540 memset(cmd_p, 0, sizeof(*cmd_p));
542 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_UNREF);
543 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
545 vbuf->resp_cb_data = bo;
546 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
549 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
550 uint32_t scanout_id, uint32_t resource_id,
551 uint32_t width, uint32_t height,
552 uint32_t x, uint32_t y)
554 struct virtio_gpu_set_scanout *cmd_p;
555 struct virtio_gpu_vbuffer *vbuf;
557 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
558 memset(cmd_p, 0, sizeof(*cmd_p));
560 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SET_SCANOUT);
561 cmd_p->resource_id = cpu_to_le32(resource_id);
562 cmd_p->scanout_id = cpu_to_le32(scanout_id);
563 cmd_p->r.width = cpu_to_le32(width);
564 cmd_p->r.height = cpu_to_le32(height);
565 cmd_p->r.x = cpu_to_le32(x);
566 cmd_p->r.y = cpu_to_le32(y);
568 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
571 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
572 uint32_t resource_id,
573 uint32_t x, uint32_t y,
574 uint32_t width, uint32_t height)
576 struct virtio_gpu_resource_flush *cmd_p;
577 struct virtio_gpu_vbuffer *vbuf;
579 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
580 memset(cmd_p, 0, sizeof(*cmd_p));
582 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_FLUSH);
583 cmd_p->resource_id = cpu_to_le32(resource_id);
584 cmd_p->r.width = cpu_to_le32(width);
585 cmd_p->r.height = cpu_to_le32(height);
586 cmd_p->r.x = cpu_to_le32(x);
587 cmd_p->r.y = cpu_to_le32(y);
589 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
592 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
594 uint32_t width, uint32_t height,
595 uint32_t x, uint32_t y,
596 struct virtio_gpu_object_array *objs,
597 struct virtio_gpu_fence *fence)
599 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
600 struct virtio_gpu_transfer_to_host_2d *cmd_p;
601 struct virtio_gpu_vbuffer *vbuf;
602 bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
603 struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
606 dma_sync_sg_for_device(vgdev->vdev->dev.parent,
607 shmem->pages->sgl, shmem->pages->nents,
610 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
611 memset(cmd_p, 0, sizeof(*cmd_p));
614 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D);
615 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
616 cmd_p->offset = cpu_to_le64(offset);
617 cmd_p->r.width = cpu_to_le32(width);
618 cmd_p->r.height = cpu_to_le32(height);
619 cmd_p->r.x = cpu_to_le32(x);
620 cmd_p->r.y = cpu_to_le32(y);
622 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
626 virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,
627 uint32_t resource_id,
628 struct virtio_gpu_mem_entry *ents,
630 struct virtio_gpu_fence *fence)
632 struct virtio_gpu_resource_attach_backing *cmd_p;
633 struct virtio_gpu_vbuffer *vbuf;
635 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
636 memset(cmd_p, 0, sizeof(*cmd_p));
638 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING);
639 cmd_p->resource_id = cpu_to_le32(resource_id);
640 cmd_p->nr_entries = cpu_to_le32(nents);
642 vbuf->data_buf = ents;
643 vbuf->data_size = sizeof(*ents) * nents;
645 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
648 static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,
649 struct virtio_gpu_vbuffer *vbuf)
651 struct virtio_gpu_resp_display_info *resp =
652 (struct virtio_gpu_resp_display_info *)vbuf->resp_buf;
655 spin_lock(&vgdev->display_info_lock);
656 for (i = 0; i < vgdev->num_scanouts; i++) {
657 vgdev->outputs[i].info = resp->pmodes[i];
658 if (resp->pmodes[i].enabled) {
659 DRM_DEBUG("output %d: %dx%d+%d+%d", i,
660 le32_to_cpu(resp->pmodes[i].r.width),
661 le32_to_cpu(resp->pmodes[i].r.height),
662 le32_to_cpu(resp->pmodes[i].r.x),
663 le32_to_cpu(resp->pmodes[i].r.y));
665 DRM_DEBUG("output %d: disabled", i);
669 vgdev->display_info_pending = false;
670 spin_unlock(&vgdev->display_info_lock);
671 wake_up(&vgdev->resp_wq);
673 if (!drm_helper_hpd_irq_event(vgdev->ddev))
674 drm_kms_helper_hotplug_event(vgdev->ddev);
677 static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,
678 struct virtio_gpu_vbuffer *vbuf)
680 struct virtio_gpu_get_capset_info *cmd =
681 (struct virtio_gpu_get_capset_info *)vbuf->buf;
682 struct virtio_gpu_resp_capset_info *resp =
683 (struct virtio_gpu_resp_capset_info *)vbuf->resp_buf;
684 int i = le32_to_cpu(cmd->capset_index);
686 spin_lock(&vgdev->display_info_lock);
687 vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);
688 vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);
689 vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);
690 spin_unlock(&vgdev->display_info_lock);
691 wake_up(&vgdev->resp_wq);
694 static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,
695 struct virtio_gpu_vbuffer *vbuf)
697 struct virtio_gpu_get_capset *cmd =
698 (struct virtio_gpu_get_capset *)vbuf->buf;
699 struct virtio_gpu_resp_capset *resp =
700 (struct virtio_gpu_resp_capset *)vbuf->resp_buf;
701 struct virtio_gpu_drv_cap_cache *cache_ent;
703 spin_lock(&vgdev->display_info_lock);
704 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
705 if (cache_ent->version == le32_to_cpu(cmd->capset_version) &&
706 cache_ent->id == le32_to_cpu(cmd->capset_id)) {
707 memcpy(cache_ent->caps_cache, resp->capset_data,
709 /* Copy must occur before is_valid is signalled. */
711 atomic_set(&cache_ent->is_valid, 1);
715 spin_unlock(&vgdev->display_info_lock);
716 wake_up_all(&vgdev->resp_wq);
719 static int virtio_get_edid_block(void *data, u8 *buf,
720 unsigned int block, size_t len)
722 struct virtio_gpu_resp_edid *resp = data;
723 size_t start = block * EDID_LENGTH;
725 if (start + len > le32_to_cpu(resp->size))
727 memcpy(buf, resp->edid + start, len);
731 static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev,
732 struct virtio_gpu_vbuffer *vbuf)
734 struct virtio_gpu_cmd_get_edid *cmd =
735 (struct virtio_gpu_cmd_get_edid *)vbuf->buf;
736 struct virtio_gpu_resp_edid *resp =
737 (struct virtio_gpu_resp_edid *)vbuf->resp_buf;
738 uint32_t scanout = le32_to_cpu(cmd->scanout);
739 struct virtio_gpu_output *output;
740 struct edid *new_edid, *old_edid;
742 if (scanout >= vgdev->num_scanouts)
744 output = vgdev->outputs + scanout;
746 new_edid = drm_do_get_edid(&output->conn, virtio_get_edid_block, resp);
747 drm_connector_update_edid_property(&output->conn, new_edid);
749 spin_lock(&vgdev->display_info_lock);
750 old_edid = output->edid;
751 output->edid = new_edid;
752 spin_unlock(&vgdev->display_info_lock);
755 wake_up(&vgdev->resp_wq);
758 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)
760 struct virtio_gpu_ctrl_hdr *cmd_p;
761 struct virtio_gpu_vbuffer *vbuf;
764 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_display_info),
769 cmd_p = virtio_gpu_alloc_cmd_resp
770 (vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,
771 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_display_info),
773 memset(cmd_p, 0, sizeof(*cmd_p));
775 vgdev->display_info_pending = true;
776 cmd_p->type = cpu_to_le32(VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
777 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
781 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)
783 struct virtio_gpu_get_capset_info *cmd_p;
784 struct virtio_gpu_vbuffer *vbuf;
787 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset_info),
792 cmd_p = virtio_gpu_alloc_cmd_resp
793 (vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,
794 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_capset_info),
796 memset(cmd_p, 0, sizeof(*cmd_p));
798 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET_INFO);
799 cmd_p->capset_index = cpu_to_le32(idx);
800 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
804 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
805 int idx, int version,
806 struct virtio_gpu_drv_cap_cache **cache_p)
808 struct virtio_gpu_get_capset *cmd_p;
809 struct virtio_gpu_vbuffer *vbuf;
811 struct virtio_gpu_drv_cap_cache *cache_ent;
812 struct virtio_gpu_drv_cap_cache *search_ent;
817 if (idx >= vgdev->num_capsets)
820 if (version > vgdev->capsets[idx].max_version)
823 cache_ent = kzalloc(sizeof(*cache_ent), GFP_KERNEL);
827 max_size = vgdev->capsets[idx].max_size;
828 cache_ent->caps_cache = kmalloc(max_size, GFP_KERNEL);
829 if (!cache_ent->caps_cache) {
834 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset) + max_size,
837 kfree(cache_ent->caps_cache);
842 cache_ent->version = version;
843 cache_ent->id = vgdev->capsets[idx].id;
844 atomic_set(&cache_ent->is_valid, 0);
845 cache_ent->size = max_size;
846 spin_lock(&vgdev->display_info_lock);
847 /* Search while under lock in case it was added by another task. */
848 list_for_each_entry(search_ent, &vgdev->cap_cache, head) {
849 if (search_ent->id == vgdev->capsets[idx].id &&
850 search_ent->version == version) {
851 *cache_p = search_ent;
856 list_add_tail(&cache_ent->head, &vgdev->cap_cache);
857 spin_unlock(&vgdev->display_info_lock);
860 /* Entry was found, so free everything that was just created. */
862 kfree(cache_ent->caps_cache);
867 cmd_p = virtio_gpu_alloc_cmd_resp
868 (vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),
869 sizeof(struct virtio_gpu_resp_capset) + max_size,
871 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET);
872 cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);
873 cmd_p->capset_version = cpu_to_le32(version);
874 *cache_p = cache_ent;
875 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
880 int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev)
882 struct virtio_gpu_cmd_get_edid *cmd_p;
883 struct virtio_gpu_vbuffer *vbuf;
887 if (WARN_ON(!vgdev->has_edid))
890 for (scanout = 0; scanout < vgdev->num_scanouts; scanout++) {
891 resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_edid),
896 cmd_p = virtio_gpu_alloc_cmd_resp
897 (vgdev, &virtio_gpu_cmd_get_edid_cb, &vbuf,
898 sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_edid),
900 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_EDID);
901 cmd_p->scanout = cpu_to_le32(scanout);
902 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
908 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
909 uint32_t nlen, const char *name)
911 struct virtio_gpu_ctx_create *cmd_p;
912 struct virtio_gpu_vbuffer *vbuf;
914 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
915 memset(cmd_p, 0, sizeof(*cmd_p));
917 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_CREATE);
918 cmd_p->hdr.ctx_id = cpu_to_le32(id);
919 cmd_p->nlen = cpu_to_le32(nlen);
920 strncpy(cmd_p->debug_name, name, sizeof(cmd_p->debug_name) - 1);
921 cmd_p->debug_name[sizeof(cmd_p->debug_name) - 1] = 0;
922 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
925 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
928 struct virtio_gpu_ctx_destroy *cmd_p;
929 struct virtio_gpu_vbuffer *vbuf;
931 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
932 memset(cmd_p, 0, sizeof(*cmd_p));
934 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DESTROY);
935 cmd_p->hdr.ctx_id = cpu_to_le32(id);
936 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
939 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
941 struct virtio_gpu_object_array *objs)
943 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
944 struct virtio_gpu_ctx_resource *cmd_p;
945 struct virtio_gpu_vbuffer *vbuf;
947 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
948 memset(cmd_p, 0, sizeof(*cmd_p));
951 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE);
952 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
953 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
954 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
957 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
959 struct virtio_gpu_object_array *objs)
961 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
962 struct virtio_gpu_ctx_resource *cmd_p;
963 struct virtio_gpu_vbuffer *vbuf;
965 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
966 memset(cmd_p, 0, sizeof(*cmd_p));
969 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE);
970 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
971 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
972 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
976 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
977 struct virtio_gpu_object *bo,
978 struct virtio_gpu_object_params *params,
979 struct virtio_gpu_object_array *objs,
980 struct virtio_gpu_fence *fence)
982 struct virtio_gpu_resource_create_3d *cmd_p;
983 struct virtio_gpu_vbuffer *vbuf;
985 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
986 memset(cmd_p, 0, sizeof(*cmd_p));
989 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_3D);
990 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
991 cmd_p->format = cpu_to_le32(params->format);
992 cmd_p->width = cpu_to_le32(params->width);
993 cmd_p->height = cpu_to_le32(params->height);
995 cmd_p->target = cpu_to_le32(params->target);
996 cmd_p->bind = cpu_to_le32(params->bind);
997 cmd_p->depth = cpu_to_le32(params->depth);
998 cmd_p->array_size = cpu_to_le32(params->array_size);
999 cmd_p->last_level = cpu_to_le32(params->last_level);
1000 cmd_p->nr_samples = cpu_to_le32(params->nr_samples);
1001 cmd_p->flags = cpu_to_le32(params->flags);
1003 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
1008 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
1010 uint64_t offset, uint32_t level,
1011 struct drm_virtgpu_3d_box *box,
1012 struct virtio_gpu_object_array *objs,
1013 struct virtio_gpu_fence *fence)
1015 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
1016 struct virtio_gpu_transfer_host_3d *cmd_p;
1017 struct virtio_gpu_vbuffer *vbuf;
1018 bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
1019 struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
1022 dma_sync_sg_for_device(vgdev->vdev->dev.parent,
1023 shmem->pages->sgl, shmem->pages->nents,
1026 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
1027 memset(cmd_p, 0, sizeof(*cmd_p));
1031 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D);
1032 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
1033 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
1034 convert_to_hw_box(&cmd_p->box, box);
1035 cmd_p->offset = cpu_to_le64(offset);
1036 cmd_p->level = cpu_to_le32(level);
1038 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
1041 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
1043 uint64_t offset, uint32_t level,
1044 struct drm_virtgpu_3d_box *box,
1045 struct virtio_gpu_object_array *objs,
1046 struct virtio_gpu_fence *fence)
1048 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
1049 struct virtio_gpu_transfer_host_3d *cmd_p;
1050 struct virtio_gpu_vbuffer *vbuf;
1052 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
1053 memset(cmd_p, 0, sizeof(*cmd_p));
1057 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D);
1058 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
1059 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
1060 convert_to_hw_box(&cmd_p->box, box);
1061 cmd_p->offset = cpu_to_le64(offset);
1062 cmd_p->level = cpu_to_le32(level);
1064 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
1067 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
1068 void *data, uint32_t data_size,
1070 struct virtio_gpu_object_array *objs,
1071 struct virtio_gpu_fence *fence)
1073 struct virtio_gpu_cmd_submit *cmd_p;
1074 struct virtio_gpu_vbuffer *vbuf;
1076 cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
1077 memset(cmd_p, 0, sizeof(*cmd_p));
1079 vbuf->data_buf = data;
1080 vbuf->data_size = data_size;
1083 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SUBMIT_3D);
1084 cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
1085 cmd_p->size = cpu_to_le32(data_size);
1087 virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
1090 void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
1091 struct virtio_gpu_object *obj,
1092 struct virtio_gpu_mem_entry *ents,
1095 virtio_gpu_cmd_resource_attach_backing(vgdev, obj->hw_res_handle,
1099 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
1100 struct virtio_gpu_output *output)
1102 struct virtio_gpu_vbuffer *vbuf;
1103 struct virtio_gpu_update_cursor *cur_p;
1105 output->cursor.pos.scanout_id = cpu_to_le32(output->index);
1106 cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);
1107 memcpy(cur_p, &output->cursor, sizeof(output->cursor));
1108 virtio_gpu_queue_cursor(vgdev, vbuf);
1111 static void virtio_gpu_cmd_resource_uuid_cb(struct virtio_gpu_device *vgdev,
1112 struct virtio_gpu_vbuffer *vbuf)
1114 struct virtio_gpu_object *obj =
1115 gem_to_virtio_gpu_obj(vbuf->objs->objs[0]);
1116 struct virtio_gpu_resp_resource_uuid *resp =
1117 (struct virtio_gpu_resp_resource_uuid *)vbuf->resp_buf;
1118 uint32_t resp_type = le32_to_cpu(resp->hdr.type);
1120 spin_lock(&vgdev->resource_export_lock);
1121 WARN_ON(obj->uuid_state != UUID_INITIALIZING);
1123 if (resp_type == VIRTIO_GPU_RESP_OK_RESOURCE_UUID &&
1124 obj->uuid_state == UUID_INITIALIZING) {
1125 memcpy(&obj->uuid.b, resp->uuid, sizeof(obj->uuid.b));
1126 obj->uuid_state = UUID_INITIALIZED;
1128 obj->uuid_state = UUID_INITIALIZATION_FAILED;
1130 spin_unlock(&vgdev->resource_export_lock);
1132 wake_up_all(&vgdev->resp_wq);
1136 virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,
1137 struct virtio_gpu_object_array *objs)
1139 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
1140 struct virtio_gpu_resource_assign_uuid *cmd_p;
1141 struct virtio_gpu_vbuffer *vbuf;
1142 struct virtio_gpu_resp_resource_uuid *resp_buf;
1144 resp_buf = kzalloc(sizeof(*resp_buf), GFP_KERNEL);
1146 spin_lock(&vgdev->resource_export_lock);
1147 bo->uuid_state = UUID_INITIALIZATION_FAILED;
1148 spin_unlock(&vgdev->resource_export_lock);
1149 virtio_gpu_array_put_free(objs);
1153 cmd_p = virtio_gpu_alloc_cmd_resp
1154 (vgdev, virtio_gpu_cmd_resource_uuid_cb, &vbuf, sizeof(*cmd_p),
1155 sizeof(struct virtio_gpu_resp_resource_uuid), resp_buf);
1156 memset(cmd_p, 0, sizeof(*cmd_p));
1158 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID);
1159 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
1162 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);