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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/ttm/ttm_bo_api.h>
40#include <drm/ttm/ttm_bo_driver.h>
41#include <drm/ttm/ttm_placement.h>
42#include <drm/ttm/ttm_module.h>
43
44#define DRIVER_NAME "virtio_gpu"
45#define DRIVER_DESC "virtio GPU"
46#define DRIVER_DATE "0"
47
48#define DRIVER_MAJOR 0
49#define DRIVER_MINOR 0
50#define DRIVER_PATCHLEVEL 1
51
52/* virtgpu_drm_bus.c */
53int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
54
55struct virtio_gpu_object {
56 struct drm_gem_object gem_base;
57 uint32_t hw_res_handle;
58
59 struct sg_table *pages;
60 void *vmap;
61 bool dumb;
62 struct ttm_place placement_code;
63 struct ttm_placement placement;
64 struct ttm_buffer_object tbo;
65 struct ttm_bo_kmap_obj kmap;
66};
67#define gem_to_virtio_gpu_obj(gobj) \
68 container_of((gobj), struct virtio_gpu_object, gem_base)
69
70struct virtio_gpu_vbuffer;
71struct virtio_gpu_device;
72
73typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
74 struct virtio_gpu_vbuffer *vbuf);
75
76struct virtio_gpu_fence_driver {
77 atomic64_t last_seq;
78 uint64_t sync_seq;
79 uint64_t context;
80 struct list_head fences;
81 spinlock_t lock;
82};
83
84struct virtio_gpu_fence {
85 struct dma_fence f;
86 struct virtio_gpu_fence_driver *drv;
87 struct list_head node;
88 uint64_t seq;
89};
90#define to_virtio_fence(x) \
91 container_of(x, struct virtio_gpu_fence, f)
92
93struct virtio_gpu_vbuffer {
94 char *buf;
95 int size;
96
97 void *data_buf;
98 uint32_t data_size;
99
100 char *resp_buf;
101 int resp_size;
102
103 virtio_gpu_resp_cb resp_cb;
104
105 struct list_head list;
106};
107
108struct virtio_gpu_output {
109 int index;
110 struct drm_crtc crtc;
111 struct drm_connector conn;
112 struct drm_encoder enc;
113 struct virtio_gpu_display_one info;
114 struct virtio_gpu_update_cursor cursor;
115 int cur_x;
116 int cur_y;
117};
118#define drm_crtc_to_virtio_gpu_output(x) \
119 container_of(x, struct virtio_gpu_output, crtc)
120#define drm_connector_to_virtio_gpu_output(x) \
121 container_of(x, struct virtio_gpu_output, conn)
122#define drm_encoder_to_virtio_gpu_output(x) \
123 container_of(x, struct virtio_gpu_output, enc)
124
125struct virtio_gpu_framebuffer {
126 struct drm_framebuffer base;
127 struct drm_gem_object *obj;
128 int x1, y1, x2, y2; /* dirty rect */
129 spinlock_t dirty_lock;
130 uint32_t hw_res_handle;
131};
132#define to_virtio_gpu_framebuffer(x) \
133 container_of(x, struct virtio_gpu_framebuffer, base)
134
135struct virtio_gpu_mman {
136 struct ttm_bo_global_ref bo_global_ref;
137 struct drm_global_reference mem_global_ref;
138 bool mem_global_referenced;
139 struct ttm_bo_device bdev;
140};
141
142struct virtio_gpu_fbdev;
143
144struct virtio_gpu_queue {
145 struct virtqueue *vq;
146 spinlock_t qlock;
147 wait_queue_head_t ack_queue;
148 struct work_struct dequeue_work;
149};
150
151struct virtio_gpu_drv_capset {
152 uint32_t id;
153 uint32_t max_version;
154 uint32_t max_size;
155};
156
157struct virtio_gpu_drv_cap_cache {
158 struct list_head head;
159 void *caps_cache;
160 uint32_t id;
161 uint32_t version;
162 uint32_t size;
163 atomic_t is_valid;
164};
165
166struct virtio_gpu_device {
167 struct device *dev;
168 struct drm_device *ddev;
169
170 struct virtio_device *vdev;
171
172 struct virtio_gpu_mman mman;
173
174 /* pointer to fbdev info structure */
175 struct virtio_gpu_fbdev *vgfbdev;
176 struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
177 uint32_t num_scanouts;
178
179 struct virtio_gpu_queue ctrlq;
180 struct virtio_gpu_queue cursorq;
181 struct kmem_cache *vbufs;
182 bool vqs_ready;
183
184 struct idr resource_idr;
185 spinlock_t resource_idr_lock;
186
187 wait_queue_head_t resp_wq;
188 /* current display info */
189 spinlock_t display_info_lock;
190 bool display_info_pending;
191
192 struct virtio_gpu_fence_driver fence_drv;
193
194 struct idr ctx_id_idr;
195 spinlock_t ctx_id_idr_lock;
196
197 bool has_virgl_3d;
198
199 struct work_struct config_changed_work;
200
201 struct virtio_gpu_drv_capset *capsets;
202 uint32_t num_capsets;
203 struct list_head cap_cache;
204};
205
206struct virtio_gpu_fpriv {
207 uint32_t ctx_id;
208};
209
210/* virtio_ioctl.c */
211#define DRM_VIRTIO_NUM_IOCTLS 10
212extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
213
214/* virtio_kms.c */
215int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
216void virtio_gpu_driver_unload(struct drm_device *dev);
217int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
218void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
219
220/* virtio_gem.c */
221void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
222int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
223void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
224int virtio_gpu_gem_create(struct drm_file *file,
225 struct drm_device *dev,
226 uint64_t size,
227 struct drm_gem_object **obj_p,
228 uint32_t *handle_p);
229int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
230 struct drm_file *file);
231void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
232 struct drm_file *file);
233struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
234 size_t size, bool kernel,
235 bool pinned);
236int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
237 struct drm_device *dev,
238 struct drm_mode_create_dumb *args);
239int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
240 struct drm_device *dev,
241 uint32_t handle, uint64_t *offset_p);
242
243/* virtio_fb */
244#define VIRTIO_GPUFB_CONN_LIMIT 1
245int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
246void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
247int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
248 struct drm_clip_rect *clips,
249 unsigned int num_clips);
250/* virtio vg */
251int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
252void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
253void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
254 uint32_t *resid);
255void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
256void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
257 uint32_t resource_id,
258 uint32_t format,
259 uint32_t width,
260 uint32_t height);
261void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
262 uint32_t resource_id);
263void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
264 uint32_t resource_id, uint64_t offset,
265 __le32 width, __le32 height,
266 __le32 x, __le32 y,
267 struct virtio_gpu_fence **fence);
268void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
269 uint32_t resource_id,
270 uint32_t x, uint32_t y,
271 uint32_t width, uint32_t height);
272void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
273 uint32_t scanout_id, uint32_t resource_id,
274 uint32_t width, uint32_t height,
275 uint32_t x, uint32_t y);
276int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
277 struct virtio_gpu_object *obj,
278 uint32_t resource_id,
279 struct virtio_gpu_fence **fence);
280int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
281int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
282void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
283 struct virtio_gpu_output *output);
284int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
285void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
286 uint32_t resource_id);
287int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
288int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
289 int idx, int version,
290 struct virtio_gpu_drv_cap_cache **cache_p);
291void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
292 uint32_t nlen, const char *name);
293void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
294 uint32_t id);
295void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
296 uint32_t ctx_id,
297 uint32_t resource_id);
298void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
299 uint32_t ctx_id,
300 uint32_t resource_id);
301void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
302 void *data, uint32_t data_size,
303 uint32_t ctx_id, struct virtio_gpu_fence **fence);
304void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
305 uint32_t resource_id, uint32_t ctx_id,
306 uint64_t offset, uint32_t level,
307 struct virtio_gpu_box *box,
308 struct virtio_gpu_fence **fence);
309void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
310 uint32_t resource_id, uint32_t ctx_id,
311 uint64_t offset, uint32_t level,
312 struct virtio_gpu_box *box,
313 struct virtio_gpu_fence **fence);
314void
315virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
316 struct virtio_gpu_resource_create_3d *rc_3d,
317 struct virtio_gpu_fence **fence);
318void virtio_gpu_ctrl_ack(struct virtqueue *vq);
319void virtio_gpu_cursor_ack(struct virtqueue *vq);
320void virtio_gpu_fence_ack(struct virtqueue *vq);
321void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
322void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
323void virtio_gpu_dequeue_fence_func(struct work_struct *work);
324
325/* virtio_gpu_display.c */
326int virtio_gpu_framebuffer_init(struct drm_device *dev,
327 struct virtio_gpu_framebuffer *vgfb,
328 const struct drm_mode_fb_cmd2 *mode_cmd,
329 struct drm_gem_object *obj);
330int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
331void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
332
333/* virtio_gpu_plane.c */
334uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc);
335struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
336 enum drm_plane_type type,
337 int index);
338
339/* virtio_gpu_ttm.c */
340int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
341void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
342int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
343
344/* virtio_gpu_fence.c */
345int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
346 struct virtio_gpu_ctrl_hdr *cmd_hdr,
347 struct virtio_gpu_fence **fence);
348void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
349 u64 last_seq);
350
351/* virtio_gpu_object */
352int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
353 unsigned long size, bool kernel, bool pinned,
354 struct virtio_gpu_object **bo_ptr);
355int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
356int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
357 struct virtio_gpu_object *bo);
358void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
359int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
360
361/* virtgpu_prime.c */
362int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
363void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
364struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
365struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
366 struct drm_device *dev, struct dma_buf_attachment *attach,
367 struct sg_table *sgt);
368void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
369void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
370int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
371 struct vm_area_struct *vma);
372
373static inline struct virtio_gpu_object*
374virtio_gpu_object_ref(struct virtio_gpu_object *bo)
375{
376 ttm_bo_reference(&bo->tbo);
377 return bo;
378}
379
380static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
381{
382 struct ttm_buffer_object *tbo;
383
384 if ((*bo) == NULL)
385 return;
386 tbo = &((*bo)->tbo);
387 ttm_bo_unref(&tbo);
388 if (tbo == NULL)
389 *bo = NULL;
390}
391
392static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
393{
394 return drm_vma_node_offset_addr(&bo->tbo.vma_node);
395}
396
397static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
398 bool no_wait)
399{
400 int r;
401
402 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
403 if (unlikely(r != 0)) {
404 if (r != -ERESTARTSYS) {
405 struct virtio_gpu_device *qdev =
406 bo->gem_base.dev->dev_private;
407 dev_err(qdev->dev, "%p reserve failed\n", bo);
408 }
409 return r;
410 }
411 return 0;
412}
413
414static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
415{
416 ttm_bo_unreserve(&bo->tbo);
417}
418
419/* virgl debufs */
420int virtio_gpu_debugfs_init(struct drm_minor *minor);
421
422#endif