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
8 * without limitation the rights to use, copy, modify, merge, publish,
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/virtio.h>
30 #include <linux/virtio_ids.h>
31 #include <linux/virtio_config.h>
32 #include <linux/virtio_gpu.h>
35 #include <drm/drm_gem.h>
36 #include <drm/drm_atomic.h>
37 #include <drm/drm_crtc_helper.h>
38 #include <drm/drm_encoder.h>
39 #include <drm/drm_fb_helper.h>
40 #include <drm/ttm/ttm_bo_api.h>
41 #include <drm/ttm/ttm_bo_driver.h>
42 #include <drm/ttm/ttm_placement.h>
43 #include <drm/ttm/ttm_module.h>
45 #define DRIVER_NAME "virtio_gpu"
46 #define DRIVER_DESC "virtio GPU"
47 #define DRIVER_DATE "0"
49 #define DRIVER_MAJOR 0
50 #define DRIVER_MINOR 1
51 #define DRIVER_PATCHLEVEL 0
53 /* virtgpu_drm_bus.c */
54 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
56 struct virtio_gpu_object {
57 struct drm_gem_object gem_base;
58 uint32_t hw_res_handle;
60 struct sg_table *pages;
64 struct ttm_place placement_code;
65 struct ttm_placement placement;
66 struct ttm_buffer_object tbo;
67 struct ttm_bo_kmap_obj kmap;
70 #define gem_to_virtio_gpu_obj(gobj) \
71 container_of((gobj), struct virtio_gpu_object, gem_base)
73 struct virtio_gpu_vbuffer;
74 struct virtio_gpu_device;
76 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
77 struct virtio_gpu_vbuffer *vbuf);
79 struct virtio_gpu_fence_driver {
83 struct list_head fences;
87 struct virtio_gpu_fence {
89 struct virtio_gpu_fence_driver *drv;
90 struct list_head node;
93 #define to_virtio_fence(x) \
94 container_of(x, struct virtio_gpu_fence, f)
96 struct virtio_gpu_vbuffer {
106 virtio_gpu_resp_cb resp_cb;
108 struct list_head list;
111 struct virtio_gpu_output {
113 struct drm_crtc crtc;
114 struct drm_connector conn;
115 struct drm_encoder enc;
116 struct virtio_gpu_display_one info;
117 struct virtio_gpu_update_cursor cursor;
123 #define drm_crtc_to_virtio_gpu_output(x) \
124 container_of(x, struct virtio_gpu_output, crtc)
125 #define drm_connector_to_virtio_gpu_output(x) \
126 container_of(x, struct virtio_gpu_output, conn)
127 #define drm_encoder_to_virtio_gpu_output(x) \
128 container_of(x, struct virtio_gpu_output, enc)
130 struct virtio_gpu_framebuffer {
131 struct drm_framebuffer base;
132 int x1, y1, x2, y2; /* dirty rect */
133 spinlock_t dirty_lock;
134 uint32_t hw_res_handle;
135 struct virtio_gpu_fence *fence;
137 #define to_virtio_gpu_framebuffer(x) \
138 container_of(x, struct virtio_gpu_framebuffer, base)
140 struct virtio_gpu_fbdev {
141 struct drm_fb_helper helper;
142 struct virtio_gpu_framebuffer vgfb;
143 struct virtio_gpu_device *vgdev;
144 struct delayed_work work;
147 struct virtio_gpu_mman {
148 struct ttm_bo_device bdev;
151 struct virtio_gpu_fbdev;
153 struct virtio_gpu_queue {
154 struct virtqueue *vq;
156 wait_queue_head_t ack_queue;
157 struct work_struct dequeue_work;
160 struct virtio_gpu_drv_capset {
162 uint32_t max_version;
166 struct virtio_gpu_drv_cap_cache {
167 struct list_head head;
175 struct virtio_gpu_device {
177 struct drm_device *ddev;
179 struct virtio_device *vdev;
181 struct virtio_gpu_mman mman;
183 /* pointer to fbdev info structure */
184 struct virtio_gpu_fbdev *vgfbdev;
185 struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
186 uint32_t num_scanouts;
188 struct virtio_gpu_queue ctrlq;
189 struct virtio_gpu_queue cursorq;
190 struct kmem_cache *vbufs;
193 struct ida resource_ida;
195 wait_queue_head_t resp_wq;
196 /* current display info */
197 spinlock_t display_info_lock;
198 bool display_info_pending;
200 struct virtio_gpu_fence_driver fence_drv;
202 struct ida ctx_id_ida;
207 struct work_struct config_changed_work;
209 struct virtio_gpu_drv_capset *capsets;
210 uint32_t num_capsets;
211 struct list_head cap_cache;
214 struct virtio_gpu_fpriv {
219 #define DRM_VIRTIO_NUM_IOCTLS 10
220 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
223 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
224 void virtio_gpu_driver_unload(struct drm_device *dev);
225 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
226 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
229 void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
230 int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
231 void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
232 int virtio_gpu_gem_create(struct drm_file *file,
233 struct drm_device *dev,
235 struct drm_gem_object **obj_p,
237 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
238 struct drm_file *file);
239 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
240 struct drm_file *file);
241 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
242 size_t size, bool kernel,
244 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
245 struct drm_device *dev,
246 struct drm_mode_create_dumb *args);
247 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
248 struct drm_device *dev,
249 uint32_t handle, uint64_t *offset_p);
252 #define VIRTIO_GPUFB_CONN_LIMIT 1
253 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
254 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
255 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
256 struct drm_clip_rect *clips,
257 unsigned int num_clips);
259 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
260 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
261 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
262 struct virtio_gpu_object *bo,
266 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
267 uint32_t resource_id);
268 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
269 struct virtio_gpu_object *bo,
271 __le32 width, __le32 height,
273 struct virtio_gpu_fence *fence);
274 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
275 uint32_t resource_id,
276 uint32_t x, uint32_t y,
277 uint32_t width, uint32_t height);
278 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
279 uint32_t scanout_id, uint32_t resource_id,
280 uint32_t width, uint32_t height,
281 uint32_t x, uint32_t y);
282 int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
283 struct virtio_gpu_object *obj,
284 struct virtio_gpu_fence *fence);
285 void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev,
286 struct virtio_gpu_object *obj);
287 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
288 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
289 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
290 struct virtio_gpu_output *output);
291 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
292 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
293 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
294 int idx, int version,
295 struct virtio_gpu_drv_cap_cache **cache_p);
296 int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev);
297 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
298 uint32_t nlen, const char *name);
299 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
301 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
303 uint32_t resource_id);
304 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
306 uint32_t resource_id);
307 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
308 void *data, uint32_t data_size,
309 uint32_t ctx_id, struct virtio_gpu_fence *fence);
310 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
311 uint32_t resource_id, uint32_t ctx_id,
312 uint64_t offset, uint32_t level,
313 struct virtio_gpu_box *box,
314 struct virtio_gpu_fence *fence);
315 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
316 struct virtio_gpu_object *bo,
318 uint64_t offset, uint32_t level,
319 struct virtio_gpu_box *box,
320 struct virtio_gpu_fence *fence);
322 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
323 struct virtio_gpu_object *bo,
324 struct virtio_gpu_resource_create_3d *rc_3d);
325 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
326 void virtio_gpu_cursor_ack(struct virtqueue *vq);
327 void virtio_gpu_fence_ack(struct virtqueue *vq);
328 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
329 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
330 void virtio_gpu_dequeue_fence_func(struct work_struct *work);
332 /* virtio_gpu_display.c */
333 int virtio_gpu_framebuffer_init(struct drm_device *dev,
334 struct virtio_gpu_framebuffer *vgfb,
335 const struct drm_mode_fb_cmd2 *mode_cmd,
336 struct drm_gem_object *obj);
337 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
338 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
340 /* virtio_gpu_plane.c */
341 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc);
342 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
343 enum drm_plane_type type,
346 /* virtio_gpu_ttm.c */
347 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
348 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
349 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
351 /* virtio_gpu_fence.c */
352 struct virtio_gpu_fence *virtio_gpu_fence_alloc(
353 struct virtio_gpu_device *vgdev);
354 void virtio_gpu_fence_cleanup(struct virtio_gpu_fence *fence);
355 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
356 struct virtio_gpu_ctrl_hdr *cmd_hdr,
357 struct virtio_gpu_fence *fence);
358 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
361 /* virtio_gpu_object */
362 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
363 unsigned long size, bool kernel, bool pinned,
364 struct virtio_gpu_object **bo_ptr);
365 void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo);
366 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo);
367 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
368 struct virtio_gpu_object *bo);
369 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
370 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
372 /* virtgpu_prime.c */
373 int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
374 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
375 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
376 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
377 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
378 struct vm_area_struct *vma);
380 static inline struct virtio_gpu_object*
381 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
383 ttm_bo_get(&bo->tbo);
387 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
389 struct ttm_buffer_object *tbo;
398 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
400 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
403 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
408 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
409 if (unlikely(r != 0)) {
410 if (r != -ERESTARTSYS) {
411 struct virtio_gpu_device *qdev =
412 bo->gem_base.dev->dev_private;
413 dev_err(qdev->dev, "%p reserve failed\n", bo);
420 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
422 ttm_bo_unreserve(&bo->tbo);
426 int virtio_gpu_debugfs_init(struct drm_minor *minor);