tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
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:
12 *
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.
16 *
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.
24 */
25
26#ifndef VIRTIO_DRV_H
27#define VIRTIO_DRV_H
28
29#include <linux/virtio.h>
30#include <linux/virtio_ids.h>
31#include <linux/virtio_config.h>
32#include <linux/virtio_gpu.h>
33
34#include <drm/drmP.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>
44
45#define DRIVER_NAME "virtio_gpu"
46#define DRIVER_DESC "virtio GPU"
47#define DRIVER_DATE "0"
48
49#define DRIVER_MAJOR 0
50#define DRIVER_MINOR 0
51#define DRIVER_PATCHLEVEL 1
52
53/* virtgpu_drm_bus.c */
54int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
55
56struct virtio_gpu_object {
57 struct drm_gem_object gem_base;
58 uint32_t hw_res_handle;
59
60 struct sg_table *pages;
61 uint32_t mapped;
62 void *vmap;
63 bool dumb;
64 struct ttm_place placement_code;
65 struct ttm_placement placement;
66 struct ttm_buffer_object tbo;
67 struct ttm_bo_kmap_obj kmap;
68};
69#define gem_to_virtio_gpu_obj(gobj) \
70 container_of((gobj), struct virtio_gpu_object, gem_base)
71
72struct virtio_gpu_vbuffer;
73struct virtio_gpu_device;
74
75typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
76 struct virtio_gpu_vbuffer *vbuf);
77
78struct virtio_gpu_fence_driver {
79 atomic64_t last_seq;
80 uint64_t sync_seq;
81 uint64_t context;
82 struct list_head fences;
83 spinlock_t lock;
84};
85
86struct virtio_gpu_fence {
87 struct dma_fence f;
88 struct virtio_gpu_fence_driver *drv;
89 struct list_head node;
90 uint64_t seq;
91};
92#define to_virtio_fence(x) \
93 container_of(x, struct virtio_gpu_fence, f)
94
95struct virtio_gpu_vbuffer {
96 char *buf;
97 int size;
98
99 void *data_buf;
100 uint32_t data_size;
101
102 char *resp_buf;
103 int resp_size;
104
105 virtio_gpu_resp_cb resp_cb;
106
107 struct list_head list;
108};
109
110struct virtio_gpu_output {
111 int index;
112 struct drm_crtc crtc;
113 struct drm_connector conn;
114 struct drm_encoder enc;
115 struct virtio_gpu_display_one info;
116 struct virtio_gpu_update_cursor cursor;
117 int cur_x;
118 int cur_y;
119 bool enabled;
120};
121#define drm_crtc_to_virtio_gpu_output(x) \
122 container_of(x, struct virtio_gpu_output, crtc)
123#define drm_connector_to_virtio_gpu_output(x) \
124 container_of(x, struct virtio_gpu_output, conn)
125#define drm_encoder_to_virtio_gpu_output(x) \
126 container_of(x, struct virtio_gpu_output, enc)
127
128struct virtio_gpu_framebuffer {
129 struct drm_framebuffer base;
130 int x1, y1, x2, y2; /* dirty rect */
131 spinlock_t dirty_lock;
132 uint32_t hw_res_handle;
133};
134#define to_virtio_gpu_framebuffer(x) \
135 container_of(x, struct virtio_gpu_framebuffer, base)
136
137struct virtio_gpu_fbdev {
138 struct drm_fb_helper helper;
139 struct virtio_gpu_framebuffer vgfb;
140 struct virtio_gpu_device *vgdev;
141 struct delayed_work work;
142};
143
144struct virtio_gpu_mman {
145 struct ttm_bo_global_ref bo_global_ref;
146 struct drm_global_reference mem_global_ref;
147 bool mem_global_referenced;
148 struct ttm_bo_device bdev;
149};
150
151struct virtio_gpu_fbdev;
152
153struct virtio_gpu_queue {
154 struct virtqueue *vq;
155 spinlock_t qlock;
156 wait_queue_head_t ack_queue;
157 struct work_struct dequeue_work;
158};
159
160struct virtio_gpu_drv_capset {
161 uint32_t id;
162 uint32_t max_version;
163 uint32_t max_size;
164};
165
166struct virtio_gpu_drv_cap_cache {
167 struct list_head head;
168 void *caps_cache;
169 uint32_t id;
170 uint32_t version;
171 uint32_t size;
172 atomic_t is_valid;
173};
174
175struct virtio_gpu_device {
176 struct device *dev;
177 struct drm_device *ddev;
178
179 struct virtio_device *vdev;
180
181 struct virtio_gpu_mman mman;
182
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;
187
188 struct virtio_gpu_queue ctrlq;
189 struct virtio_gpu_queue cursorq;
190 struct kmem_cache *vbufs;
191 bool vqs_ready;
192
193 struct idr resource_idr;
194 spinlock_t resource_idr_lock;
195
196 wait_queue_head_t resp_wq;
197 /* current display info */
198 spinlock_t display_info_lock;
199 bool display_info_pending;
200
201 struct virtio_gpu_fence_driver fence_drv;
202
203 struct idr ctx_id_idr;
204 spinlock_t ctx_id_idr_lock;
205
206 bool has_virgl_3d;
207
208 struct work_struct config_changed_work;
209
210 struct virtio_gpu_drv_capset *capsets;
211 uint32_t num_capsets;
212 struct list_head cap_cache;
213};
214
215struct virtio_gpu_fpriv {
216 uint32_t ctx_id;
217};
218
219/* virtio_ioctl.c */
220#define DRM_VIRTIO_NUM_IOCTLS 10
221extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
222
223/* virtio_kms.c */
224int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
225void virtio_gpu_driver_unload(struct drm_device *dev);
226int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
227void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
228
229/* virtio_gem.c */
230void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
231int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
232void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
233int virtio_gpu_gem_create(struct drm_file *file,
234 struct drm_device *dev,
235 uint64_t size,
236 struct drm_gem_object **obj_p,
237 uint32_t *handle_p);
238int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
239 struct drm_file *file);
240void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
241 struct drm_file *file);
242struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
243 size_t size, bool kernel,
244 bool pinned);
245int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
246 struct drm_device *dev,
247 struct drm_mode_create_dumb *args);
248int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
249 struct drm_device *dev,
250 uint32_t handle, uint64_t *offset_p);
251
252/* virtio_fb */
253#define VIRTIO_GPUFB_CONN_LIMIT 1
254int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
255void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
256int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
257 struct drm_clip_rect *clips,
258 unsigned int num_clips);
259/* virtio vg */
260int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
261void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
262void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
263 uint32_t *resid);
264void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
265void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
266 uint32_t resource_id,
267 uint32_t format,
268 uint32_t width,
269 uint32_t height);
270void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
271 uint32_t resource_id);
272void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
273 struct virtio_gpu_object *bo,
274 uint64_t offset,
275 __le32 width, __le32 height,
276 __le32 x, __le32 y,
277 struct virtio_gpu_fence **fence);
278void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
279 uint32_t resource_id,
280 uint32_t x, uint32_t y,
281 uint32_t width, uint32_t height);
282void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
283 uint32_t scanout_id, uint32_t resource_id,
284 uint32_t width, uint32_t height,
285 uint32_t x, uint32_t y);
286int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
287 struct virtio_gpu_object *obj,
288 uint32_t resource_id,
289 struct virtio_gpu_fence **fence);
290void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev,
291 struct virtio_gpu_object *obj);
292int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
293int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
294void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
295 struct virtio_gpu_output *output);
296int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
297int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
298int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
299 int idx, int version,
300 struct virtio_gpu_drv_cap_cache **cache_p);
301void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
302 uint32_t nlen, const char *name);
303void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
304 uint32_t id);
305void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
306 uint32_t ctx_id,
307 uint32_t resource_id);
308void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
309 uint32_t ctx_id,
310 uint32_t resource_id);
311void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
312 void *data, uint32_t data_size,
313 uint32_t ctx_id, struct virtio_gpu_fence **fence);
314void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
315 uint32_t resource_id, uint32_t ctx_id,
316 uint64_t offset, uint32_t level,
317 struct virtio_gpu_box *box,
318 struct virtio_gpu_fence **fence);
319void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
320 struct virtio_gpu_object *bo,
321 uint32_t ctx_id,
322 uint64_t offset, uint32_t level,
323 struct virtio_gpu_box *box,
324 struct virtio_gpu_fence **fence);
325void
326virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
327 struct virtio_gpu_resource_create_3d *rc_3d,
328 struct virtio_gpu_fence **fence);
329void virtio_gpu_ctrl_ack(struct virtqueue *vq);
330void virtio_gpu_cursor_ack(struct virtqueue *vq);
331void virtio_gpu_fence_ack(struct virtqueue *vq);
332void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
333void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
334void virtio_gpu_dequeue_fence_func(struct work_struct *work);
335
336/* virtio_gpu_display.c */
337int virtio_gpu_framebuffer_init(struct drm_device *dev,
338 struct virtio_gpu_framebuffer *vgfb,
339 const struct drm_mode_fb_cmd2 *mode_cmd,
340 struct drm_gem_object *obj);
341int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
342void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
343
344/* virtio_gpu_plane.c */
345uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc);
346struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
347 enum drm_plane_type type,
348 int index);
349
350/* virtio_gpu_ttm.c */
351int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
352void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
353int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
354
355/* virtio_gpu_fence.c */
356int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
357 struct virtio_gpu_ctrl_hdr *cmd_hdr,
358 struct virtio_gpu_fence **fence);
359void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
360 u64 last_seq);
361
362/* virtio_gpu_object */
363int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
364 unsigned long size, bool kernel, bool pinned,
365 struct virtio_gpu_object **bo_ptr);
366void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo);
367int virtio_gpu_object_kmap(struct virtio_gpu_object *bo);
368int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
369 struct virtio_gpu_object *bo);
370void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
371int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
372
373/* virtgpu_prime.c */
374int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
375void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
376struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
377struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
378 struct drm_device *dev, struct dma_buf_attachment *attach,
379 struct sg_table *sgt);
380void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
381void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
382int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
383 struct vm_area_struct *vma);
384
385static inline struct virtio_gpu_object*
386virtio_gpu_object_ref(struct virtio_gpu_object *bo)
387{
388 ttm_bo_get(&bo->tbo);
389 return bo;
390}
391
392static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
393{
394 struct ttm_buffer_object *tbo;
395
396 if ((*bo) == NULL)
397 return;
398 tbo = &((*bo)->tbo);
399 ttm_bo_put(tbo);
400 *bo = NULL;
401}
402
403static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
404{
405 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
406}
407
408static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
409 bool no_wait)
410{
411 int r;
412
413 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
414 if (unlikely(r != 0)) {
415 if (r != -ERESTARTSYS) {
416 struct virtio_gpu_device *qdev =
417 bo->gem_base.dev->dev_private;
418 dev_err(qdev->dev, "%p reserve failed\n", bo);
419 }
420 return r;
421 }
422 return 0;
423}
424
425static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
426{
427 ttm_bo_unreserve(&bo->tbo);
428}
429
430/* virgl debufs */
431int virtio_gpu_debugfs_init(struct drm_minor *minor);
432
433#endif