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 shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
29 #include <drm/virtgpu_drm.h>
30 #include <drm/ttm/ttm_execbuf_util.h>
31 #include <linux/sync_file.h>
33 #include "virtgpu_drv.h"
35 static void convert_to_hw_box(struct virtio_gpu_box *dst,
36 const struct drm_virtgpu_3d_box *src)
38 dst->x = cpu_to_le32(src->x);
39 dst->y = cpu_to_le32(src->y);
40 dst->z = cpu_to_le32(src->z);
41 dst->w = cpu_to_le32(src->w);
42 dst->h = cpu_to_le32(src->h);
43 dst->d = cpu_to_le32(src->d);
46 static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
47 struct drm_file *file_priv)
49 struct virtio_gpu_device *vgdev = dev->dev_private;
50 struct drm_virtgpu_map *virtio_gpu_map = data;
52 return virtio_gpu_mode_dumb_mmap(file_priv, vgdev->ddev,
53 virtio_gpu_map->handle,
54 &virtio_gpu_map->offset);
57 static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
58 struct list_head *head)
60 struct ttm_operation_ctx ctx = { false, false };
61 struct ttm_validate_buffer *buf;
62 struct ttm_buffer_object *bo;
63 struct virtio_gpu_object *qobj;
66 ret = ttm_eu_reserve_buffers(ticket, head, true, NULL);
70 list_for_each_entry(buf, head, head) {
72 qobj = container_of(bo, struct virtio_gpu_object, tbo);
73 ret = ttm_bo_validate(bo, &qobj->placement, &ctx);
75 ttm_eu_backoff_reservation(ticket, head);
82 static void virtio_gpu_unref_list(struct list_head *head)
84 struct ttm_validate_buffer *buf;
85 struct ttm_buffer_object *bo;
86 struct virtio_gpu_object *qobj;
88 list_for_each_entry(buf, head, head) {
90 qobj = container_of(bo, struct virtio_gpu_object, tbo);
92 drm_gem_object_put_unlocked(&qobj->gem_base);
97 * Usage of execbuffer:
98 * Relocations need to take into account the full VIRTIO_GPUDrawable size.
99 * However, the command as passed from user space must *not* contain the initial
100 * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
102 static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
103 struct drm_file *drm_file)
105 struct drm_virtgpu_execbuffer *exbuf = data;
106 struct virtio_gpu_device *vgdev = dev->dev_private;
107 struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
108 struct drm_gem_object *gobj;
109 struct virtio_gpu_fence *out_fence;
110 struct virtio_gpu_object *qobj;
112 uint32_t *bo_handles = NULL;
113 void __user *user_bo_handles = NULL;
114 struct list_head validate_list;
115 struct ttm_validate_buffer *buflist = NULL;
117 struct ww_acquire_ctx ticket;
118 struct sync_file *sync_file;
119 int in_fence_fd = exbuf->fence_fd;
120 int out_fence_fd = -1;
123 if (vgdev->has_virgl_3d == false)
126 if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
129 exbuf->fence_fd = -1;
131 if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) {
132 struct dma_fence *in_fence;
134 in_fence = sync_file_get_fence(in_fence_fd);
140 * Wait if the fence is from a foreign context, or if the fence
141 * array contains any fence from a foreign context.
144 if (!dma_fence_match_context(in_fence, vgdev->fence_drv.context))
145 ret = dma_fence_wait(in_fence, true);
147 dma_fence_put(in_fence);
152 if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) {
153 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
154 if (out_fence_fd < 0)
158 INIT_LIST_HEAD(&validate_list);
159 if (exbuf->num_bo_handles) {
161 bo_handles = kvmalloc_array(exbuf->num_bo_handles,
162 sizeof(uint32_t), GFP_KERNEL);
163 buflist = kvmalloc_array(exbuf->num_bo_handles,
164 sizeof(struct ttm_validate_buffer),
165 GFP_KERNEL | __GFP_ZERO);
166 if (!bo_handles || !buflist) {
171 user_bo_handles = (void __user *)(uintptr_t)exbuf->bo_handles;
172 if (copy_from_user(bo_handles, user_bo_handles,
173 exbuf->num_bo_handles * sizeof(uint32_t))) {
178 for (i = 0; i < exbuf->num_bo_handles; i++) {
179 gobj = drm_gem_object_lookup(drm_file, bo_handles[i]);
185 qobj = gem_to_virtio_gpu_obj(gobj);
186 buflist[i].bo = &qobj->tbo;
188 list_add(&buflist[i].head, &validate_list);
194 ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
198 buf = memdup_user((void __user *)(uintptr_t)exbuf->command,
205 out_fence = virtio_gpu_fence_alloc(vgdev);
211 if (out_fence_fd >= 0) {
212 sync_file = sync_file_create(&out_fence->f);
214 dma_fence_put(&out_fence->f);
219 exbuf->fence_fd = out_fence_fd;
220 fd_install(out_fence_fd, sync_file->file);
223 virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
224 vfpriv->ctx_id, out_fence);
226 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &out_fence->f);
228 /* fence the command bo */
229 virtio_gpu_unref_list(&validate_list);
236 ttm_eu_backoff_reservation(&ticket, &validate_list);
238 virtio_gpu_unref_list(&validate_list);
243 if (out_fence_fd >= 0)
244 put_unused_fd(out_fence_fd);
249 static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
250 struct drm_file *file_priv)
252 struct virtio_gpu_device *vgdev = dev->dev_private;
253 struct drm_virtgpu_getparam *param = data;
256 switch (param->param) {
257 case VIRTGPU_PARAM_3D_FEATURES:
258 value = vgdev->has_virgl_3d == true ? 1 : 0;
260 case VIRTGPU_PARAM_CAPSET_QUERY_FIX:
266 if (copy_to_user((void __user *)(unsigned long)param->value,
267 &value, sizeof(int))) {
273 static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
274 struct drm_file *file_priv)
276 struct virtio_gpu_device *vgdev = dev->dev_private;
277 struct drm_virtgpu_resource_create *rc = data;
279 struct virtio_gpu_object *qobj;
280 struct drm_gem_object *obj;
283 struct list_head validate_list;
284 struct ttm_validate_buffer mainbuf;
285 struct virtio_gpu_fence *fence = NULL;
286 struct ww_acquire_ctx ticket;
287 struct virtio_gpu_resource_create_3d rc_3d;
289 if (vgdev->has_virgl_3d == false) {
292 if (rc->nr_samples > 1)
294 if (rc->last_level > 1)
298 if (rc->array_size > 1)
302 INIT_LIST_HEAD(&validate_list);
303 memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
307 /* allocate a single page size object */
311 qobj = virtio_gpu_alloc_object(dev, size, false, false);
313 return PTR_ERR(qobj);
314 obj = &qobj->gem_base;
316 if (!vgdev->has_virgl_3d) {
317 virtio_gpu_cmd_create_resource(vgdev, qobj, rc->format,
318 rc->width, rc->height);
320 ret = virtio_gpu_object_attach(vgdev, qobj, NULL);
322 /* use a gem reference since unref list undoes them */
323 drm_gem_object_get(&qobj->gem_base);
324 mainbuf.bo = &qobj->tbo;
325 list_add(&mainbuf.head, &validate_list);
327 ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
329 DRM_DEBUG("failed to validate\n");
333 rc_3d.resource_id = cpu_to_le32(qobj->hw_res_handle);
334 rc_3d.target = cpu_to_le32(rc->target);
335 rc_3d.format = cpu_to_le32(rc->format);
336 rc_3d.bind = cpu_to_le32(rc->bind);
337 rc_3d.width = cpu_to_le32(rc->width);
338 rc_3d.height = cpu_to_le32(rc->height);
339 rc_3d.depth = cpu_to_le32(rc->depth);
340 rc_3d.array_size = cpu_to_le32(rc->array_size);
341 rc_3d.last_level = cpu_to_le32(rc->last_level);
342 rc_3d.nr_samples = cpu_to_le32(rc->nr_samples);
343 rc_3d.flags = cpu_to_le32(rc->flags);
345 fence = virtio_gpu_fence_alloc(vgdev);
351 virtio_gpu_cmd_resource_create_3d(vgdev, qobj, &rc_3d);
352 ret = virtio_gpu_object_attach(vgdev, qobj, fence);
354 virtio_gpu_fence_cleanup(fence);
357 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
360 ret = drm_gem_handle_create(file_priv, obj, &handle);
363 drm_gem_object_release(obj);
364 if (vgdev->has_virgl_3d) {
365 virtio_gpu_unref_list(&validate_list);
366 dma_fence_put(&fence->f);
370 drm_gem_object_put_unlocked(obj);
372 rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
373 rc->bo_handle = handle;
375 if (vgdev->has_virgl_3d) {
376 virtio_gpu_unref_list(&validate_list);
377 dma_fence_put(&fence->f);
381 ttm_eu_backoff_reservation(&ticket, &validate_list);
383 if (vgdev->has_virgl_3d) {
384 virtio_gpu_unref_list(&validate_list);
385 dma_fence_put(&fence->f);
388 // drm_gem_object_handle_unreference_unlocked(obj);
392 static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
393 struct drm_file *file_priv)
395 struct drm_virtgpu_resource_info *ri = data;
396 struct drm_gem_object *gobj = NULL;
397 struct virtio_gpu_object *qobj = NULL;
399 gobj = drm_gem_object_lookup(file_priv, ri->bo_handle);
403 qobj = gem_to_virtio_gpu_obj(gobj);
405 ri->size = qobj->gem_base.size;
406 ri->res_handle = qobj->hw_res_handle;
407 drm_gem_object_put_unlocked(gobj);
411 static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
413 struct drm_file *file)
415 struct virtio_gpu_device *vgdev = dev->dev_private;
416 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
417 struct drm_virtgpu_3d_transfer_from_host *args = data;
418 struct ttm_operation_ctx ctx = { true, false };
419 struct drm_gem_object *gobj = NULL;
420 struct virtio_gpu_object *qobj = NULL;
421 struct virtio_gpu_fence *fence;
423 u32 offset = args->offset;
424 struct virtio_gpu_box box;
426 if (vgdev->has_virgl_3d == false)
429 gobj = drm_gem_object_lookup(file, args->bo_handle);
433 qobj = gem_to_virtio_gpu_obj(gobj);
435 ret = virtio_gpu_object_reserve(qobj, false);
439 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
443 convert_to_hw_box(&box, &args->box);
445 fence = virtio_gpu_fence_alloc(vgdev);
450 virtio_gpu_cmd_transfer_from_host_3d
451 (vgdev, qobj->hw_res_handle,
452 vfpriv->ctx_id, offset, args->level,
454 reservation_object_add_excl_fence(qobj->tbo.resv,
457 dma_fence_put(&fence->f);
459 virtio_gpu_object_unreserve(qobj);
461 drm_gem_object_put_unlocked(gobj);
465 static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
466 struct drm_file *file)
468 struct virtio_gpu_device *vgdev = dev->dev_private;
469 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
470 struct drm_virtgpu_3d_transfer_to_host *args = data;
471 struct ttm_operation_ctx ctx = { true, false };
472 struct drm_gem_object *gobj = NULL;
473 struct virtio_gpu_object *qobj = NULL;
474 struct virtio_gpu_fence *fence;
475 struct virtio_gpu_box box;
477 u32 offset = args->offset;
479 gobj = drm_gem_object_lookup(file, args->bo_handle);
483 qobj = gem_to_virtio_gpu_obj(gobj);
485 ret = virtio_gpu_object_reserve(qobj, false);
489 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
493 convert_to_hw_box(&box, &args->box);
494 if (!vgdev->has_virgl_3d) {
495 virtio_gpu_cmd_transfer_to_host_2d
496 (vgdev, qobj, offset,
497 box.w, box.h, box.x, box.y, NULL);
499 fence = virtio_gpu_fence_alloc(vgdev);
504 virtio_gpu_cmd_transfer_to_host_3d
506 vfpriv ? vfpriv->ctx_id : 0, offset,
507 args->level, &box, fence);
508 reservation_object_add_excl_fence(qobj->tbo.resv,
510 dma_fence_put(&fence->f);
514 virtio_gpu_object_unreserve(qobj);
516 drm_gem_object_put_unlocked(gobj);
520 static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
521 struct drm_file *file)
523 struct drm_virtgpu_3d_wait *args = data;
524 struct drm_gem_object *gobj = NULL;
525 struct virtio_gpu_object *qobj = NULL;
529 gobj = drm_gem_object_lookup(file, args->handle);
533 qobj = gem_to_virtio_gpu_obj(gobj);
535 if (args->flags & VIRTGPU_WAIT_NOWAIT)
537 ret = virtio_gpu_object_wait(qobj, nowait);
539 drm_gem_object_put_unlocked(gobj);
543 static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
544 void *data, struct drm_file *file)
546 struct virtio_gpu_device *vgdev = dev->dev_private;
547 struct drm_virtgpu_get_caps *args = data;
548 unsigned size, host_caps_size;
550 int found_valid = -1;
552 struct virtio_gpu_drv_cap_cache *cache_ent;
555 if (vgdev->num_capsets == 0)
558 /* don't allow userspace to pass 0 */
562 spin_lock(&vgdev->display_info_lock);
563 for (i = 0; i < vgdev->num_capsets; i++) {
564 if (vgdev->capsets[i].id == args->cap_set_id) {
565 if (vgdev->capsets[i].max_version >= args->cap_set_ver) {
572 if (found_valid == -1) {
573 spin_unlock(&vgdev->display_info_lock);
577 host_caps_size = vgdev->capsets[found_valid].max_size;
578 /* only copy to user the minimum of the host caps size or the guest caps size */
579 size = min(args->size, host_caps_size);
581 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
582 if (cache_ent->id == args->cap_set_id &&
583 cache_ent->version == args->cap_set_ver) {
584 ptr = cache_ent->caps_cache;
585 spin_unlock(&vgdev->display_info_lock);
589 spin_unlock(&vgdev->display_info_lock);
591 /* not in cache - need to talk to hw */
592 virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
595 ret = wait_event_timeout(vgdev->resp_wq,
596 atomic_read(&cache_ent->is_valid), 5 * HZ);
600 ptr = cache_ent->caps_cache;
603 if (copy_to_user((void __user *)(unsigned long)args->addr, ptr, size))
609 struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
610 DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
611 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
613 DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
614 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
616 DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
617 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
619 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
620 virtio_gpu_resource_create_ioctl,
621 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
623 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
624 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
626 /* make transfer async to the main ring? - no sure, can we
627 * thread these in the underlying GL
629 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
630 virtio_gpu_transfer_from_host_ioctl,
631 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
632 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
633 virtio_gpu_transfer_to_host_ioctl,
634 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
636 DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
637 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
639 DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
640 DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),