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 <ttm/ttm_bo_api.h>
39#include <ttm/ttm_bo_driver.h>
40#include <ttm/ttm_placement.h>
41#include <ttm/ttm_module.h>
42
43#define DRIVER_NAME "virtio_gpu"
44#define DRIVER_DESC "virtio GPU"
45#define DRIVER_DATE "0"
46
47#define DRIVER_MAJOR 0
48#define DRIVER_MINOR 0
49#define DRIVER_PATCHLEVEL 1
50
51/* virtgpu_drm_bus.c */
52int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
53
54struct virtio_gpu_object {
55 struct drm_gem_object gem_base;
56 uint32_t hw_res_handle;
57
58 struct sg_table *pages;
59 void *vmap;
60 bool dumb;
61 struct ttm_place placement_code;
62 struct ttm_placement placement;
63 struct ttm_buffer_object tbo;
64 struct ttm_bo_kmap_obj kmap;
65};
66#define gem_to_virtio_gpu_obj(gobj) \
67 container_of((gobj), struct virtio_gpu_object, gem_base)
68
69struct virtio_gpu_vbuffer;
70struct virtio_gpu_device;
71
72typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
73 struct virtio_gpu_vbuffer *vbuf);
74
75struct virtio_gpu_fence_driver {
76 atomic64_t last_seq;
77 uint64_t sync_seq;
78 uint64_t context;
79 struct list_head fences;
80 spinlock_t lock;
81};
82
83struct virtio_gpu_fence {
84 struct dma_fence f;
85 struct virtio_gpu_fence_driver *drv;
86 struct list_head node;
87 uint64_t seq;
88};
89#define to_virtio_fence(x) \
90 container_of(x, struct virtio_gpu_fence, f)
91
92struct virtio_gpu_vbuffer {
93 char *buf;
94 int size;
95
96 void *data_buf;
97 uint32_t data_size;
98
99 char *resp_buf;
100 int resp_size;
101
102 virtio_gpu_resp_cb resp_cb;
103
104 struct list_head list;
105};
106
107struct virtio_gpu_output {
108 int index;
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;
114 int cur_x;
115 int cur_y;
116};
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)
123
124struct 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;
130};
131#define to_virtio_gpu_framebuffer(x) \
132 container_of(x, struct virtio_gpu_framebuffer, base)
133
134struct 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;
139};
140
141struct virtio_gpu_fbdev;
142
143struct virtio_gpu_queue {
144 struct virtqueue *vq;
145 spinlock_t qlock;
146 wait_queue_head_t ack_queue;
147 struct work_struct dequeue_work;
148};
149
150struct virtio_gpu_drv_capset {
151 uint32_t id;
152 uint32_t max_version;
153 uint32_t max_size;
154};
155
156struct virtio_gpu_drv_cap_cache {
157 struct list_head head;
158 void *caps_cache;
159 uint32_t id;
160 uint32_t version;
161 uint32_t size;
162 atomic_t is_valid;
163};
164
165struct virtio_gpu_device {
166 struct device *dev;
167 struct drm_device *ddev;
168
169 struct virtio_device *vdev;
170
171 struct virtio_gpu_mman mman;
172
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;
177
178 struct virtio_gpu_queue ctrlq;
179 struct virtio_gpu_queue cursorq;
180 struct list_head free_vbufs;
181 spinlock_t free_vbufs_lock;
182 void *vbufs;
183 bool vqs_ready;
184
185 struct idr resource_idr;
186 spinlock_t resource_idr_lock;
187
188 wait_queue_head_t resp_wq;
189 /* current display info */
190 spinlock_t display_info_lock;
191 bool display_info_pending;
192
193 struct virtio_gpu_fence_driver fence_drv;
194
195 struct idr ctx_id_idr;
196 spinlock_t ctx_id_idr_lock;
197
198 bool has_virgl_3d;
199
200 struct work_struct config_changed_work;
201
202 struct virtio_gpu_drv_capset *capsets;
203 uint32_t num_capsets;
204 struct list_head cap_cache;
205};
206
207struct virtio_gpu_fpriv {
208 uint32_t ctx_id;
209};
210
211/* virtio_ioctl.c */
212#define DRM_VIRTIO_NUM_IOCTLS 10
213extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
214
215/* virtio_kms.c */
216int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
217int virtio_gpu_driver_unload(struct drm_device *dev);
218int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
219void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
220
221/* virtio_gem.c */
222void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
223int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
224void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
225int virtio_gpu_gem_create(struct drm_file *file,
226 struct drm_device *dev,
227 uint64_t size,
228 struct drm_gem_object **obj_p,
229 uint32_t *handle_p);
230int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
231 struct drm_file *file);
232void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
233 struct drm_file *file);
234struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
235 size_t size, bool kernel,
236 bool pinned);
237int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
238 struct drm_device *dev,
239 struct drm_mode_create_dumb *args);
240int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
241 struct drm_device *dev,
242 uint32_t handle);
243int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
244 struct drm_device *dev,
245 uint32_t handle, uint64_t *offset_p);
246
247/* virtio_fb */
248#define VIRTIO_GPUFB_CONN_LIMIT 1
249int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
250void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
251int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
252 struct drm_clip_rect *clips,
253 unsigned num_clips);
254/* virtio vg */
255int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
256void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
257void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
258 uint32_t *resid);
259void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
260void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
261 uint32_t resource_id,
262 uint32_t format,
263 uint32_t width,
264 uint32_t height);
265void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
266 uint32_t resource_id);
267void 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,
270 __le32 x, __le32 y,
271 struct virtio_gpu_fence **fence);
272void 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);
276void 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);
280int 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);
284int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
285int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
286void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
287 struct virtio_gpu_output *output);
288int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
289void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
290 uint32_t resource_id);
291int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
292int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
293 int idx, int version,
294 struct virtio_gpu_drv_cap_cache **cache_p);
295void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
296 uint32_t nlen, const char *name);
297void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
298 uint32_t id);
299void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
300 uint32_t ctx_id,
301 uint32_t resource_id);
302void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
303 uint32_t ctx_id,
304 uint32_t resource_id);
305void 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);
308void 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);
313void 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);
318void
319virtio_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);
322void virtio_gpu_ctrl_ack(struct virtqueue *vq);
323void virtio_gpu_cursor_ack(struct virtqueue *vq);
324void virtio_gpu_fence_ack(struct virtqueue *vq);
325void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
326void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
327void virtio_gpu_dequeue_fence_func(struct work_struct *work);
328
329/* virtio_gpu_display.c */
330int 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);
334int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
335void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
336
337/* virtio_gpu_plane.c */
338struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
339 enum drm_plane_type type,
340 int index);
341
342/* virtio_gpu_ttm.c */
343int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
344void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
345int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
346
347/* virtio_gpu_fence.c */
348int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
349 struct virtio_gpu_ctrl_hdr *cmd_hdr,
350 struct virtio_gpu_fence **fence);
351void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
352 u64 last_seq);
353
354/* virtio_gpu_object */
355int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
356 unsigned long size, bool kernel, bool pinned,
357 struct virtio_gpu_object **bo_ptr);
358int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
359int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
360 struct virtio_gpu_object *bo);
361void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
362int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
363
364/* virtgpu_prime.c */
365int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
366void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
367struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
368struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
369 struct drm_device *dev, struct dma_buf_attachment *attach,
370 struct sg_table *sgt);
371void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
372void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
373int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
374 struct vm_area_struct *vma);
375
376static inline struct virtio_gpu_object*
377virtio_gpu_object_ref(struct virtio_gpu_object *bo)
378{
379 ttm_bo_reference(&bo->tbo);
380 return bo;
381}
382
383static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
384{
385 struct ttm_buffer_object *tbo;
386
387 if ((*bo) == NULL)
388 return;
389 tbo = &((*bo)->tbo);
390 ttm_bo_unref(&tbo);
391 if (tbo == NULL)
392 *bo = NULL;
393}
394
395static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
396{
397 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
398}
399
400static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
401 bool no_wait)
402{
403 int r;
404
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);
411 }
412 return r;
413 }
414 return 0;
415}
416
417static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
418{
419 ttm_bo_unreserve(&bo->tbo);
420}
421
422/* virgl debufs */
423int virtio_gpu_debugfs_init(struct drm_minor *minor);
424void virtio_gpu_debugfs_takedown(struct drm_minor *minor);
425
426#endif