2 * Copyright (C) 2015 Red Hat, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
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9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #include <linux/dma-direction.h>
30 #include <linux/virtio.h>
31 #include <linux/virtio_ids.h>
32 #include <linux/virtio_config.h>
33 #include <linux/virtio_gpu.h>
35 #include <drm/drm_atomic.h>
36 #include <drm/drm_drv.h>
37 #include <drm/drm_encoder.h>
38 #include <drm/drm_fb_helper.h>
39 #include <drm/drm_fourcc.h>
40 #include <drm/drm_gem.h>
41 #include <drm/drm_gem_shmem_helper.h>
42 #include <drm/drm_ioctl.h>
43 #include <drm/drm_probe_helper.h>
44 #include <drm/virtgpu_drm.h>
46 #define DRIVER_NAME "virtio_gpu"
47 #define DRIVER_DESC "virtio GPU"
48 #define DRIVER_DATE "0"
50 #define DRIVER_MAJOR 0
51 #define DRIVER_MINOR 1
52 #define DRIVER_PATCHLEVEL 0
54 #define STATE_INITIALIZING 0
58 #define MAX_CAPSET_ID 63
60 struct virtio_gpu_object_params {
67 /* classic resources only */
79 /* blob resources only */
86 struct virtio_gpu_object {
87 struct drm_gem_shmem_object base;
88 uint32_t hw_res_handle;
91 bool host3d_blob, guest_blob;
92 uint32_t blob_mem, blob_flags;
97 #define gem_to_virtio_gpu_obj(gobj) \
98 container_of((gobj), struct virtio_gpu_object, base.base)
100 struct virtio_gpu_object_shmem {
101 struct virtio_gpu_object base;
102 struct sg_table *pages;
106 struct virtio_gpu_object_vram {
107 struct virtio_gpu_object base;
110 struct drm_mm_node vram_node;
113 #define to_virtio_gpu_shmem(virtio_gpu_object) \
114 container_of((virtio_gpu_object), struct virtio_gpu_object_shmem, base)
116 #define to_virtio_gpu_vram(virtio_gpu_object) \
117 container_of((virtio_gpu_object), struct virtio_gpu_object_vram, base)
119 struct virtio_gpu_object_array {
120 struct ww_acquire_ctx ticket;
121 struct list_head next;
123 struct drm_gem_object *objs[];
126 struct virtio_gpu_vbuffer;
127 struct virtio_gpu_device;
129 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
130 struct virtio_gpu_vbuffer *vbuf);
132 struct virtio_gpu_fence_driver {
133 atomic64_t last_fence_id;
134 uint64_t current_fence_id;
136 struct list_head fences;
140 struct virtio_gpu_fence {
143 struct virtio_gpu_fence_driver *drv;
144 struct list_head node;
147 struct virtio_gpu_vbuffer {
156 virtio_gpu_resp_cb resp_cb;
159 struct virtio_gpu_object_array *objs;
160 struct list_head list;
163 struct virtio_gpu_output {
165 struct drm_crtc crtc;
166 struct drm_connector conn;
167 struct drm_encoder enc;
168 struct virtio_gpu_display_one info;
169 struct virtio_gpu_update_cursor cursor;
175 #define drm_crtc_to_virtio_gpu_output(x) \
176 container_of(x, struct virtio_gpu_output, crtc)
178 struct virtio_gpu_framebuffer {
179 struct drm_framebuffer base;
180 struct virtio_gpu_fence *fence;
182 #define to_virtio_gpu_framebuffer(x) \
183 container_of(x, struct virtio_gpu_framebuffer, base)
185 struct virtio_gpu_queue {
186 struct virtqueue *vq;
188 wait_queue_head_t ack_queue;
189 struct work_struct dequeue_work;
192 struct virtio_gpu_drv_capset {
194 uint32_t max_version;
198 struct virtio_gpu_drv_cap_cache {
199 struct list_head head;
207 struct virtio_gpu_device {
209 struct drm_device *ddev;
211 struct virtio_device *vdev;
213 struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
214 uint32_t num_scanouts;
216 struct virtio_gpu_queue ctrlq;
217 struct virtio_gpu_queue cursorq;
218 struct kmem_cache *vbufs;
220 atomic_t pending_commands;
222 struct ida resource_ida;
224 wait_queue_head_t resp_wq;
225 /* current display info */
226 spinlock_t display_info_lock;
227 bool display_info_pending;
229 struct virtio_gpu_fence_driver fence_drv;
231 struct ida ctx_id_ida;
236 bool has_resource_assign_uuid;
237 bool has_resource_blob;
238 bool has_host_visible;
239 struct virtio_shm_region host_visible_region;
240 struct drm_mm host_visible_mm;
242 struct work_struct config_changed_work;
244 struct work_struct obj_free_work;
245 spinlock_t obj_free_lock;
246 struct list_head obj_free_list;
248 struct virtio_gpu_drv_capset *capsets;
249 uint32_t num_capsets;
250 uint64_t capset_id_mask;
251 struct list_head cap_cache;
253 /* protects uuid state when exporting */
254 spinlock_t resource_export_lock;
255 /* protects map state and host_visible_mm */
256 spinlock_t host_visible_lock;
259 struct virtio_gpu_fpriv {
261 bool context_created;
262 struct mutex context_lock;
265 /* virtgpu_ioctl.c */
266 #define DRM_VIRTIO_NUM_IOCTLS 11
267 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
268 void virtio_gpu_create_context(struct drm_device *dev, struct drm_file *file);
271 int virtio_gpu_init(struct drm_device *dev);
272 void virtio_gpu_deinit(struct drm_device *dev);
273 void virtio_gpu_release(struct drm_device *dev);
274 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
275 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
278 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
279 struct drm_file *file);
280 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
281 struct drm_file *file);
282 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
283 struct drm_device *dev,
284 struct drm_mode_create_dumb *args);
285 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
286 struct drm_device *dev,
287 uint32_t handle, uint64_t *offset_p);
289 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents);
290 struct virtio_gpu_object_array*
291 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents);
292 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
293 struct drm_gem_object *obj);
294 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs);
295 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs);
296 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
297 struct dma_fence *fence);
298 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs);
299 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
300 struct virtio_gpu_object_array *objs);
301 void virtio_gpu_array_put_free_work(struct work_struct *work);
304 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
305 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
306 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
307 struct virtio_gpu_object *bo,
308 struct virtio_gpu_object_params *params,
309 struct virtio_gpu_object_array *objs,
310 struct virtio_gpu_fence *fence);
311 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
312 struct virtio_gpu_object *bo);
313 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
315 uint32_t width, uint32_t height,
316 uint32_t x, uint32_t y,
317 struct virtio_gpu_object_array *objs,
318 struct virtio_gpu_fence *fence);
319 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
320 uint32_t resource_id,
321 uint32_t x, uint32_t y,
322 uint32_t width, uint32_t height,
323 struct virtio_gpu_object_array *objs,
324 struct virtio_gpu_fence *fence);
325 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
326 uint32_t scanout_id, uint32_t resource_id,
327 uint32_t width, uint32_t height,
328 uint32_t x, uint32_t y);
329 void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
330 struct virtio_gpu_object *obj,
331 struct virtio_gpu_mem_entry *ents,
333 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
334 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
335 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
336 struct virtio_gpu_output *output);
337 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
338 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
339 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
340 int idx, int version,
341 struct virtio_gpu_drv_cap_cache **cache_p);
342 int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev);
343 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
344 uint32_t nlen, const char *name);
345 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
347 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
349 struct virtio_gpu_object_array *objs);
350 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
352 struct virtio_gpu_object_array *objs);
353 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
354 void *data, uint32_t data_size,
356 struct virtio_gpu_object_array *objs,
357 struct virtio_gpu_fence *fence);
358 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
360 uint64_t offset, uint32_t level,
362 uint32_t layer_stride,
363 struct drm_virtgpu_3d_box *box,
364 struct virtio_gpu_object_array *objs,
365 struct virtio_gpu_fence *fence);
366 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
368 uint64_t offset, uint32_t level,
370 uint32_t layer_stride,
371 struct drm_virtgpu_3d_box *box,
372 struct virtio_gpu_object_array *objs,
373 struct virtio_gpu_fence *fence);
375 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
376 struct virtio_gpu_object *bo,
377 struct virtio_gpu_object_params *params,
378 struct virtio_gpu_object_array *objs,
379 struct virtio_gpu_fence *fence);
380 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
381 void virtio_gpu_cursor_ack(struct virtqueue *vq);
382 void virtio_gpu_fence_ack(struct virtqueue *vq);
383 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
384 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
385 void virtio_gpu_dequeue_fence_func(struct work_struct *work);
387 void virtio_gpu_notify(struct virtio_gpu_device *vgdev);
390 virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,
391 struct virtio_gpu_object_array *objs);
393 int virtio_gpu_cmd_map(struct virtio_gpu_device *vgdev,
394 struct virtio_gpu_object_array *objs, uint64_t offset);
396 void virtio_gpu_cmd_unmap(struct virtio_gpu_device *vgdev,
397 struct virtio_gpu_object *bo);
400 virtio_gpu_cmd_resource_create_blob(struct virtio_gpu_device *vgdev,
401 struct virtio_gpu_object *bo,
402 struct virtio_gpu_object_params *params,
403 struct virtio_gpu_mem_entry *ents,
406 virtio_gpu_cmd_set_scanout_blob(struct virtio_gpu_device *vgdev,
408 struct virtio_gpu_object *bo,
409 struct drm_framebuffer *fb,
410 uint32_t width, uint32_t height,
411 uint32_t x, uint32_t y);
413 /* virtgpu_display.c */
414 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
415 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
417 /* virtgpu_plane.c */
418 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc);
419 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
420 enum drm_plane_type type,
423 /* virtgpu_fence.c */
424 struct virtio_gpu_fence *virtio_gpu_fence_alloc(
425 struct virtio_gpu_device *vgdev);
426 void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
427 struct virtio_gpu_ctrl_hdr *cmd_hdr,
428 struct virtio_gpu_fence *fence);
429 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
432 /* virtgpu_object.c */
433 void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo);
434 struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
436 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
437 struct virtio_gpu_object_params *params,
438 struct virtio_gpu_object **bo_ptr,
439 struct virtio_gpu_fence *fence);
441 bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo);
443 int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
445 /* virtgpu_prime.c */
446 int virtio_gpu_resource_assign_uuid(struct virtio_gpu_device *vgdev,
447 struct virtio_gpu_object *bo);
448 struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
450 struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
451 struct dma_buf *buf);
452 int virtgpu_gem_prime_get_uuid(struct drm_gem_object *obj,
454 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
455 struct drm_device *dev, struct dma_buf_attachment *attach,
456 struct sg_table *sgt);
458 /* virtgpu_debugfs.c */
459 void virtio_gpu_debugfs_init(struct drm_minor *minor);
462 bool virtio_gpu_is_vram(struct virtio_gpu_object *bo);
463 int virtio_gpu_vram_create(struct virtio_gpu_device *vgdev,
464 struct virtio_gpu_object_params *params,
465 struct virtio_gpu_object **bo_ptr);
466 struct sg_table *virtio_gpu_vram_map_dma_buf(struct virtio_gpu_object *bo,
468 enum dma_data_direction dir);
469 void virtio_gpu_vram_unmap_dma_buf(struct device *dev,
470 struct sg_table *sgt,
471 enum dma_data_direction dir);