drivers/gpu/drm/virtio/virtgpu_drv.h

   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 */
  52 int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master);
  53 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
  54
  55 struct 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
  70 struct virtio_gpu_vbuffer;
  71 struct virtio_gpu_device;
  72
  73 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
  74                                    struct virtio_gpu_vbuffer *vbuf);
  75
  76 struct 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
  84 struct virtio_gpu_fence {
  85         struct 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
  93 struct 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
 108 struct 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
 125 struct 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
 135 struct 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
 142 struct virtio_gpu_fbdev;
 143
 144 struct 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
 151 struct virtio_gpu_drv_capset {
 152         uint32_t id;
 153         uint32_t max_version;
 154         uint32_t max_size;
 155 };
 156
 157 struct 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
 166 struct 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 list_head free_vbufs;
 182         spinlock_t free_vbufs_lock;
 183         void *vbufs;
 184         bool vqs_ready;
 185
 186         struct idr      resource_idr;
 187         spinlock_t resource_idr_lock;
 188
 189         wait_queue_head_t resp_wq;
 190         /* current display info */
 191         spinlock_t display_info_lock;
 192         bool display_info_pending;
 193
 194         struct virtio_gpu_fence_driver fence_drv;
 195
 196         struct idr      ctx_id_idr;
 197         spinlock_t ctx_id_idr_lock;
 198
 199         bool has_virgl_3d;
 200
 201         struct work_struct config_changed_work;
 202
 203         struct virtio_gpu_drv_capset *capsets;
 204         uint32_t num_capsets;
 205         struct list_head cap_cache;
 206 };
 207
 208 struct virtio_gpu_fpriv {
 209         uint32_t ctx_id;
 210 };
 211
 212 /* virtio_ioctl.c */
 213 #define DRM_VIRTIO_NUM_IOCTLS 10
 214 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
 215
 216 /* virtio_kms.c */
 217 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
 218 int virtio_gpu_driver_unload(struct drm_device *dev);
 219 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
 220 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
 221
 222 /* virtio_gem.c */
 223 void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
 224 int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
 225 void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
 226 int virtio_gpu_gem_create(struct drm_file *file,
 227                           struct drm_device *dev,
 228                           uint64_t size,
 229                           struct drm_gem_object **obj_p,
 230                           uint32_t *handle_p);
 231 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 232                                struct drm_file *file);
 233 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
 234                                  struct drm_file *file);
 235 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
 236                                                   size_t size, bool kernel,
 237                                                   bool pinned);
 238 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
 239                                 struct drm_device *dev,
 240                                 struct drm_mode_create_dumb *args);
 241 int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
 242                                  struct drm_device *dev,
 243                                  uint32_t handle);
 244 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
 245                               struct drm_device *dev,
 246                               uint32_t handle, uint64_t *offset_p);
 247
 248 /* virtio_fb */
 249 #define VIRTIO_GPUFB_CONN_LIMIT 1
 250 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
 251 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
 252 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
 253                              struct drm_clip_rect *clips,
 254                              unsigned num_clips);
 255 /* virtio vg */
 256 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
 257 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
 258 void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
 259                                uint32_t *resid);
 260 void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
 261 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
 262                                     uint32_t resource_id,
 263                                     uint32_t format,
 264                                     uint32_t width,
 265                                     uint32_t height);
 266 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
 267                                    uint32_t resource_id);
 268 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
 269                                         uint32_t resource_id, uint64_t offset,
 270                                         __le32 width, __le32 height,
 271                                         __le32 x, __le32 y,
 272                                         struct virtio_gpu_fence **fence);
 273 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
 274                                    uint32_t resource_id,
 275                                    uint32_t x, uint32_t y,
 276                                    uint32_t width, uint32_t height);
 277 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
 278                                 uint32_t scanout_id, uint32_t resource_id,
 279                                 uint32_t width, uint32_t height,
 280                                 uint32_t x, uint32_t y);
 281 int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
 282                              struct virtio_gpu_object *obj,
 283                              uint32_t resource_id,
 284                              struct virtio_gpu_fence **fence);
 285 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
 286 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
 287 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
 288                             struct virtio_gpu_output *output);
 289 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
 290 void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
 291                                            uint32_t resource_id);
 292 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
 293 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
 294                               int idx, int version,
 295                               struct virtio_gpu_drv_cap_cache **cache_p);
 296 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
 297                                    uint32_t nlen, const char *name);
 298 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
 299                                     uint32_t id);
 300 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
 301                                             uint32_t ctx_id,
 302                                             uint32_t resource_id);
 303 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
 304                                             uint32_t ctx_id,
 305                                             uint32_t resource_id);
 306 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
 307                            void *data, uint32_t data_size,
 308                            uint32_t ctx_id, struct virtio_gpu_fence **fence);
 309 void virtio_gpu_cmd_transfer_from_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);
 314 void virtio_gpu_cmd_transfer_to_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);
 319 void
 320 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
 321                                   struct virtio_gpu_resource_create_3d *rc_3d,
 322                                   struct virtio_gpu_fence **fence);
 323 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
 324 void virtio_gpu_cursor_ack(struct virtqueue *vq);
 325 void virtio_gpu_fence_ack(struct virtqueue *vq);
 326 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
 327 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
 328 void virtio_gpu_dequeue_fence_func(struct work_struct *work);
 329
 330 /* virtio_gpu_display.c */
 331 int virtio_gpu_framebuffer_init(struct drm_device *dev,
 332                                 struct virtio_gpu_framebuffer *vgfb,
 333                                 const struct drm_mode_fb_cmd2 *mode_cmd,
 334                                 struct drm_gem_object *obj);
 335 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
 336 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
 337
 338 /* virtio_gpu_plane.c */
 339 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 340                                         enum drm_plane_type type,
 341                                         int index);
 342
 343 /* virtio_gpu_ttm.c */
 344 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
 345 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
 346 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
 347
 348 /* virtio_gpu_fence.c */
 349 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 350                           struct virtio_gpu_ctrl_hdr *cmd_hdr,
 351                           struct virtio_gpu_fence **fence);
 352 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
 353                                     u64 last_seq);
 354
 355 /* virtio_gpu_object */
 356 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 357                              unsigned long size, bool kernel, bool pinned,
 358                              struct virtio_gpu_object **bo_ptr);
 359 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
 360 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
 361                                    struct virtio_gpu_object *bo);
 362 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
 363 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);
 364
 365 /* virtgpu_prime.c */
 366 int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
 367 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
 368 struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
 369 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
 370         struct drm_device *dev, struct dma_buf_attachment *attach,
 371         struct sg_table *sgt);
 372 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
 373 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 374 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
 375                                 struct vm_area_struct *vma);
 376
 377 static inline struct virtio_gpu_object*
 378 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
 379 {
 380         ttm_bo_reference(&bo->tbo);
 381         return bo;
 382 }
 383
 384 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
 385 {
 386         struct ttm_buffer_object *tbo;
 387
 388         if ((*bo) == NULL)
 389                 return;
 390         tbo = &((*bo)->tbo);
 391         ttm_bo_unref(&tbo);
 392         if (tbo == NULL)
 393                 *bo = NULL;
 394 }
 395
 396 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
 397 {
 398         return drm_vma_node_offset_addr(&bo->tbo.vma_node);
 399 }
 400
 401 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
 402                                          bool no_wait)
 403 {
 404         int r;
 405
 406         r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
 407         if (unlikely(r != 0)) {
 408                 if (r != -ERESTARTSYS) {
 409                         struct virtio_gpu_device *qdev =
 410                                 bo->gem_base.dev->dev_private;
 411                         dev_err(qdev->dev, "%p reserve failed\n", bo);
 412                 }
 413                 return r;
 414         }
 415         return 0;
 416 }
 417
 418 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
 419 {
 420         ttm_bo_unreserve(&bo->tbo);
 421 }
 422
 423 /* virgl debufs */
 424 int virtio_gpu_debugfs_init(struct drm_minor *minor);
 425 void virtio_gpu_debugfs_takedown(struct drm_minor *minor);
 426
 427 #endif