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_crtc_helper.h>
37 #include <ttm/ttm_bo_api.h>
38 #include <ttm/ttm_bo_driver.h>
39 #include <ttm/ttm_placement.h>
40 #include <ttm/ttm_module.h>
42 #define DRIVER_NAME "virtio_gpu"
43 #define DRIVER_DESC "virtio GPU"
44 #define DRIVER_DATE "0"
46 #define DRIVER_MAJOR 0
47 #define DRIVER_MINOR 0
48 #define DRIVER_PATCHLEVEL 1
50 /* virtgpu_drm_bus.c */
51 int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master);
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 {
78 struct list_head fences;
82 struct virtio_gpu_fence {
84 struct virtio_gpu_fence_driver *drv;
85 struct list_head node;
88 #define to_virtio_fence(x) \
89 container_of(x, struct virtio_gpu_fence, f)
91 struct virtio_gpu_vbuffer {
101 virtio_gpu_resp_cb resp_cb;
103 struct list_head list;
106 struct virtio_gpu_output {
108 struct drm_crtc crtc;
109 struct drm_connector conn;
110 struct drm_encoder enc;
111 struct virtio_gpu_display_one info;
112 struct virtio_gpu_update_cursor cursor;
116 #define drm_crtc_to_virtio_gpu_output(x) \
117 container_of(x, struct virtio_gpu_output, crtc)
118 #define drm_connector_to_virtio_gpu_output(x) \
119 container_of(x, struct virtio_gpu_output, conn)
120 #define drm_encoder_to_virtio_gpu_output(x) \
121 container_of(x, struct virtio_gpu_output, enc)
123 struct virtio_gpu_framebuffer {
124 struct drm_framebuffer base;
125 struct drm_gem_object *obj;
126 int x1, y1, x2, y2; /* dirty rect */
127 spinlock_t dirty_lock;
128 uint32_t hw_res_handle;
130 #define to_virtio_gpu_framebuffer(x) \
131 container_of(x, struct virtio_gpu_framebuffer, base)
133 struct virtio_gpu_mman {
134 struct ttm_bo_global_ref bo_global_ref;
135 struct drm_global_reference mem_global_ref;
136 bool mem_global_referenced;
137 struct ttm_bo_device bdev;
140 struct virtio_gpu_fbdev;
142 struct virtio_gpu_queue {
143 struct virtqueue *vq;
145 wait_queue_head_t ack_queue;
146 struct work_struct dequeue_work;
149 struct virtio_gpu_device {
151 struct drm_device *ddev;
153 struct virtio_device *vdev;
155 struct virtio_gpu_mman mman;
157 /* pointer to fbdev info structure */
158 struct virtio_gpu_fbdev *vgfbdev;
159 struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
160 uint32_t num_scanouts;
162 struct virtio_gpu_queue ctrlq;
163 struct virtio_gpu_queue cursorq;
164 struct list_head free_vbufs;
165 spinlock_t free_vbufs_lock;
169 struct idr resource_idr;
170 spinlock_t resource_idr_lock;
172 wait_queue_head_t resp_wq;
173 /* current display info */
174 spinlock_t display_info_lock;
175 bool display_info_pending;
177 struct virtio_gpu_fence_driver fence_drv;
179 struct idr ctx_id_idr;
180 spinlock_t ctx_id_idr_lock;
182 struct work_struct config_changed_work;
185 struct virtio_gpu_fpriv {
190 #define DRM_VIRTIO_NUM_IOCTLS 10
191 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
194 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
195 int virtio_gpu_driver_unload(struct drm_device *dev);
198 void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
199 int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
200 void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
201 int virtio_gpu_gem_create(struct drm_file *file,
202 struct drm_device *dev,
204 struct drm_gem_object **obj_p,
206 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
207 size_t size, bool kernel,
209 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
210 struct drm_device *dev,
211 struct drm_mode_create_dumb *args);
212 int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
213 struct drm_device *dev,
215 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
216 struct drm_device *dev,
217 uint32_t handle, uint64_t *offset_p);
220 #define VIRTIO_GPUFB_CONN_LIMIT 1
221 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
222 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
223 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
224 struct drm_clip_rect *clips,
227 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
228 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
229 void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
231 void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
232 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
233 uint32_t resource_id,
237 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
238 uint32_t resource_id);
239 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
240 uint32_t resource_id, uint64_t offset,
241 __le32 width, __le32 height,
243 struct virtio_gpu_fence **fence);
244 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
245 uint32_t resource_id,
246 uint32_t x, uint32_t y,
247 uint32_t width, uint32_t height);
248 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
249 uint32_t scanout_id, uint32_t resource_id,
250 uint32_t width, uint32_t height,
251 uint32_t x, uint32_t y);
252 int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
253 struct virtio_gpu_object *obj,
254 uint32_t resource_id,
255 struct virtio_gpu_fence **fence);
256 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
257 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
258 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
259 struct virtio_gpu_output *output);
260 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
261 void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
262 uint32_t resource_id);
263 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
264 void virtio_gpu_cursor_ack(struct virtqueue *vq);
265 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
266 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
268 /* virtio_gpu_display.c */
269 int virtio_gpu_framebuffer_init(struct drm_device *dev,
270 struct virtio_gpu_framebuffer *vgfb,
271 struct drm_mode_fb_cmd2 *mode_cmd,
272 struct drm_gem_object *obj);
273 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
274 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
276 /* virtio_gpu_plane.c */
277 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
280 /* virtio_gpu_ttm.c */
281 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
282 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
283 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
285 /* virtio_gpu_fence.c */
286 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
287 struct virtio_gpu_ctrl_hdr *cmd_hdr,
288 struct virtio_gpu_fence **fence);
289 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
292 /* virtio_gpu_object */
293 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
294 unsigned long size, bool kernel, bool pinned,
295 struct virtio_gpu_object **bo_ptr);
296 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
297 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
298 struct virtio_gpu_object *bo);
299 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
300 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
302 static inline struct virtio_gpu_object*
303 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
305 ttm_bo_reference(&bo->tbo);
309 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
311 struct ttm_buffer_object *tbo;
321 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
323 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
326 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
331 r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
332 if (unlikely(r != 0)) {
333 if (r != -ERESTARTSYS) {
334 struct virtio_gpu_device *qdev =
335 bo->gem_base.dev->dev_private;
336 dev_err(qdev->dev, "%p reserve failed\n", bo);
343 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
345 ttm_bo_unreserve(&bo->tbo);
349 int virtio_gpu_debugfs_init(struct drm_minor *minor);
350 void virtio_gpu_debugfs_takedown(struct drm_minor *minor);