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 <ttm/ttm_bo_api.h>
39 #include <ttm/ttm_bo_driver.h>
40 #include <ttm/ttm_placement.h>
41 #include <ttm/ttm_module.h>
43 #define DRIVER_NAME "virtio_gpu"
44 #define DRIVER_DESC "virtio GPU"
45 #define DRIVER_DATE "0"
47 #define DRIVER_MAJOR 0
48 #define DRIVER_MINOR 0
49 #define DRIVER_PATCHLEVEL 1
51 /* virtgpu_drm_bus.c */
52 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
54 struct virtio_gpu_object {
55 struct drm_gem_object gem_base;
56 uint32_t hw_res_handle;
58 struct sg_table *pages;
61 struct ttm_place placement_code;
62 struct ttm_placement placement;
63 struct ttm_buffer_object tbo;
64 struct ttm_bo_kmap_obj kmap;
66 #define gem_to_virtio_gpu_obj(gobj) \
67 container_of((gobj), struct virtio_gpu_object, gem_base)
69 struct virtio_gpu_vbuffer;
70 struct virtio_gpu_device;
72 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
73 struct virtio_gpu_vbuffer *vbuf);
75 struct virtio_gpu_fence_driver {
79 struct list_head fences;
83 struct virtio_gpu_fence {
85 struct virtio_gpu_fence_driver *drv;
86 struct list_head node;
89 #define to_virtio_fence(x) \
90 container_of(x, struct virtio_gpu_fence, f)
92 struct virtio_gpu_vbuffer {
102 virtio_gpu_resp_cb resp_cb;
104 struct list_head list;
107 struct virtio_gpu_output {
109 struct drm_crtc crtc;
110 struct drm_connector conn;
111 struct drm_encoder enc;
112 struct virtio_gpu_display_one info;
113 struct virtio_gpu_update_cursor cursor;
117 #define drm_crtc_to_virtio_gpu_output(x) \
118 container_of(x, struct virtio_gpu_output, crtc)
119 #define drm_connector_to_virtio_gpu_output(x) \
120 container_of(x, struct virtio_gpu_output, conn)
121 #define drm_encoder_to_virtio_gpu_output(x) \
122 container_of(x, struct virtio_gpu_output, enc)
124 struct virtio_gpu_framebuffer {
125 struct drm_framebuffer base;
126 struct drm_gem_object *obj;
127 int x1, y1, x2, y2; /* dirty rect */
128 spinlock_t dirty_lock;
129 uint32_t hw_res_handle;
131 #define to_virtio_gpu_framebuffer(x) \
132 container_of(x, struct virtio_gpu_framebuffer, base)
134 struct virtio_gpu_mman {
135 struct ttm_bo_global_ref bo_global_ref;
136 struct drm_global_reference mem_global_ref;
137 bool mem_global_referenced;
138 struct ttm_bo_device bdev;
141 struct virtio_gpu_fbdev;
143 struct virtio_gpu_queue {
144 struct virtqueue *vq;
146 wait_queue_head_t ack_queue;
147 struct work_struct dequeue_work;
150 struct virtio_gpu_drv_capset {
152 uint32_t max_version;
156 struct virtio_gpu_drv_cap_cache {
157 struct list_head head;
165 struct virtio_gpu_device {
167 struct drm_device *ddev;
169 struct virtio_device *vdev;
171 struct virtio_gpu_mman mman;
173 /* pointer to fbdev info structure */
174 struct virtio_gpu_fbdev *vgfbdev;
175 struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
176 uint32_t num_scanouts;
178 struct virtio_gpu_queue ctrlq;
179 struct virtio_gpu_queue cursorq;
180 struct list_head free_vbufs;
181 spinlock_t free_vbufs_lock;
185 struct idr resource_idr;
186 spinlock_t resource_idr_lock;
188 wait_queue_head_t resp_wq;
189 /* current display info */
190 spinlock_t display_info_lock;
191 bool display_info_pending;
193 struct virtio_gpu_fence_driver fence_drv;
195 struct idr ctx_id_idr;
196 spinlock_t ctx_id_idr_lock;
200 struct work_struct config_changed_work;
202 struct virtio_gpu_drv_capset *capsets;
203 uint32_t num_capsets;
204 struct list_head cap_cache;
207 struct virtio_gpu_fpriv {
212 #define DRM_VIRTIO_NUM_IOCTLS 10
213 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
216 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
217 int virtio_gpu_driver_unload(struct drm_device *dev);
218 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
219 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
222 void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
223 int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
224 void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
225 int virtio_gpu_gem_create(struct drm_file *file,
226 struct drm_device *dev,
228 struct drm_gem_object **obj_p,
230 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
231 struct drm_file *file);
232 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
233 struct drm_file *file);
234 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
235 size_t size, bool kernel,
237 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
238 struct drm_device *dev,
239 struct drm_mode_create_dumb *args);
240 int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
241 struct drm_device *dev,
243 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
244 struct drm_device *dev,
245 uint32_t handle, uint64_t *offset_p);
248 #define VIRTIO_GPUFB_CONN_LIMIT 1
249 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
250 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
251 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
252 struct drm_clip_rect *clips,
255 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
256 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
257 void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
259 void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
260 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
261 uint32_t resource_id,
265 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
266 uint32_t resource_id);
267 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
268 uint32_t resource_id, uint64_t offset,
269 __le32 width, __le32 height,
271 struct virtio_gpu_fence **fence);
272 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
273 uint32_t resource_id,
274 uint32_t x, uint32_t y,
275 uint32_t width, uint32_t height);
276 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
277 uint32_t scanout_id, uint32_t resource_id,
278 uint32_t width, uint32_t height,
279 uint32_t x, uint32_t y);
280 int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
281 struct virtio_gpu_object *obj,
282 uint32_t resource_id,
283 struct virtio_gpu_fence **fence);
284 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
285 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
286 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
287 struct virtio_gpu_output *output);
288 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
289 void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
290 uint32_t resource_id);
291 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
292 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
293 int idx, int version,
294 struct virtio_gpu_drv_cap_cache **cache_p);
295 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
296 uint32_t nlen, const char *name);
297 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
299 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
301 uint32_t resource_id);
302 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
304 uint32_t resource_id);
305 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
306 void *data, uint32_t data_size,
307 uint32_t ctx_id, struct virtio_gpu_fence **fence);
308 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
309 uint32_t resource_id, uint32_t ctx_id,
310 uint64_t offset, uint32_t level,
311 struct virtio_gpu_box *box,
312 struct virtio_gpu_fence **fence);
313 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
314 uint32_t resource_id, uint32_t ctx_id,
315 uint64_t offset, uint32_t level,
316 struct virtio_gpu_box *box,
317 struct virtio_gpu_fence **fence);
319 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
320 struct virtio_gpu_resource_create_3d *rc_3d,
321 struct virtio_gpu_fence **fence);
322 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
323 void virtio_gpu_cursor_ack(struct virtqueue *vq);
324 void virtio_gpu_fence_ack(struct virtqueue *vq);
325 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
326 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
327 void virtio_gpu_dequeue_fence_func(struct work_struct *work);
329 /* virtio_gpu_display.c */
330 int virtio_gpu_framebuffer_init(struct drm_device *dev,
331 struct virtio_gpu_framebuffer *vgfb,
332 const struct drm_mode_fb_cmd2 *mode_cmd,
333 struct drm_gem_object *obj);
334 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
335 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
337 /* virtio_gpu_plane.c */
338 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
339 enum drm_plane_type type,
342 /* virtio_gpu_ttm.c */
343 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
344 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
345 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
347 /* virtio_gpu_fence.c */
348 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
349 struct virtio_gpu_ctrl_hdr *cmd_hdr,
350 struct virtio_gpu_fence **fence);
351 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
354 /* virtio_gpu_object */
355 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
356 unsigned long size, bool kernel, bool pinned,
357 struct virtio_gpu_object **bo_ptr);
358 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
359 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
360 struct virtio_gpu_object *bo);
361 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
362 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
364 /* virtgpu_prime.c */
365 int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
366 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
367 struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
368 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
369 struct drm_device *dev, struct dma_buf_attachment *attach,
370 struct sg_table *sgt);
371 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
372 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
373 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
374 struct vm_area_struct *vma);
376 static inline struct virtio_gpu_object*
377 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
379 ttm_bo_reference(&bo->tbo);
383 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
385 struct ttm_buffer_object *tbo;
395 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
397 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
400 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
405 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
406 if (unlikely(r != 0)) {
407 if (r != -ERESTARTSYS) {
408 struct virtio_gpu_device *qdev =
409 bo->gem_base.dev->dev_private;
410 dev_err(qdev->dev, "%p reserve failed\n", bo);
417 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
419 ttm_bo_unreserve(&bo->tbo);
423 int virtio_gpu_debugfs_init(struct drm_minor *minor);
424 void virtio_gpu_debugfs_takedown(struct drm_minor *minor);