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_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>
  41
  42 #define DRIVER_NAME "virtio_gpu"
  43 #define DRIVER_DESC "virtio GPU"
  44 #define DRIVER_DATE "0"
  45
  46 #define DRIVER_MAJOR 0
  47 #define DRIVER_MINOR 0
  48 #define DRIVER_PATCHLEVEL 1
  49
  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);
  53
  54 struct 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
  69 struct virtio_gpu_vbuffer;
  70 struct virtio_gpu_device;
  71
  72 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
  73                                    struct virtio_gpu_vbuffer *vbuf);
  74
  75 struct virtio_gpu_fence_driver {
  76         atomic64_t       last_seq;
  77         uint64_t         sync_seq;
  78         struct list_head fences;
  79         spinlock_t       lock;
  80 };
  81
  82 struct virtio_gpu_fence {
  83         struct fence f;
  84         struct virtio_gpu_fence_driver *drv;
  85         struct list_head node;
  86         uint64_t seq;
  87 };
  88 #define to_virtio_fence(x) \
  89         container_of(x, struct virtio_gpu_fence, f)
  90
  91 struct virtio_gpu_vbuffer {
  92         char *buf;
  93         int size;
  94
  95         void *data_buf;
  96         uint32_t data_size;
  97
  98         char *resp_buf;
  99         int resp_size;
 100
 101         virtio_gpu_resp_cb resp_cb;
 102
 103         struct list_head list;
 104 };
 105
 106 struct virtio_gpu_output {
 107         int index;
 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;
 113         int cur_x;
 114         int cur_y;
 115 };
 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)
 122
 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;
 129 };
 130 #define to_virtio_gpu_framebuffer(x) \
 131         container_of(x, struct virtio_gpu_framebuffer, base)
 132
 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;
 138 };
 139
 140 struct virtio_gpu_fbdev;
 141
 142 struct virtio_gpu_queue {
 143         struct virtqueue *vq;
 144         spinlock_t qlock;
 145         wait_queue_head_t ack_queue;
 146         struct work_struct dequeue_work;
 147 };
 148
 149 struct virtio_gpu_device {
 150         struct device *dev;
 151         struct drm_device *ddev;
 152
 153         struct virtio_device *vdev;
 154
 155         struct virtio_gpu_mman mman;
 156
 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;
 161
 162         struct virtio_gpu_queue ctrlq;
 163         struct virtio_gpu_queue cursorq;
 164         struct list_head free_vbufs;
 165         spinlock_t free_vbufs_lock;
 166         void *vbufs;
 167         bool vqs_ready;
 168
 169         struct idr      resource_idr;
 170         spinlock_t resource_idr_lock;
 171
 172         wait_queue_head_t resp_wq;
 173         /* current display info */
 174         spinlock_t display_info_lock;
 175         bool display_info_pending;
 176
 177         struct virtio_gpu_fence_driver fence_drv;
 178
 179         struct idr      ctx_id_idr;
 180         spinlock_t ctx_id_idr_lock;
 181
 182         struct work_struct config_changed_work;
 183 };
 184
 185 struct virtio_gpu_fpriv {
 186         uint32_t ctx_id;
 187 };
 188
 189 /* virtio_ioctl.c */
 190 #define DRM_VIRTIO_NUM_IOCTLS 10
 191 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
 192
 193 /* virtio_kms.c */
 194 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
 195 int virtio_gpu_driver_unload(struct drm_device *dev);
 196
 197 /* virtio_gem.c */
 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,
 203                           uint64_t size,
 204                           struct drm_gem_object **obj_p,
 205                           uint32_t *handle_p);
 206 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
 207                                                   size_t size, bool kernel,
 208                                                   bool pinned);
 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,
 214                                  uint32_t handle);
 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);
 218
 219 /* virtio_fb */
 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,
 225                              unsigned num_clips);
 226 /* virtio vg */
 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,
 230                                uint32_t *resid);
 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,
 234                                     uint32_t format,
 235                                     uint32_t width,
 236                                     uint32_t height);
 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,
 242                                         __le32 x, __le32 y,
 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);
 267
 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);
 275
 276 /* virtio_gpu_plane.c */
 277 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 278                                         int index);
 279
 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);
 284
 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,
 290                                     u64 last_seq);
 291
 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);
 301
 302 static inline struct virtio_gpu_object*
 303 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
 304 {
 305         ttm_bo_reference(&bo->tbo);
 306         return bo;
 307 }
 308
 309 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
 310 {
 311         struct ttm_buffer_object *tbo;
 312
 313         if ((*bo) == NULL)
 314                 return;
 315         tbo = &((*bo)->tbo);
 316         ttm_bo_unref(&tbo);
 317         if (tbo == NULL)
 318                 *bo = NULL;
 319 }
 320
 321 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
 322 {
 323         return drm_vma_node_offset_addr(&bo->tbo.vma_node);
 324 }
 325
 326 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
 327                                          bool no_wait)
 328 {
 329         int r;
 330
 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);
 337                 }
 338                 return r;
 339         }
 340         return 0;
 341 }
 342
 343 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
 344 {
 345         ttm_bo_unreserve(&bo->tbo);
 346 }
 347
 348 /* virgl debufs */
 349 int virtio_gpu_debugfs_init(struct drm_minor *minor);
 350 void virtio_gpu_debugfs_takedown(struct drm_minor *minor);
 351
 352 #endif