drivers/gpu/drm/virtio/virtgpu_display.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Authors:
   6  *    Dave Airlie
   7  *    Alon Levy
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "virtgpu_drv.h"
  29 #include <drm/drm_crtc_helper.h>
  30 #include <drm/drm_atomic_helper.h>
  31
  32 #define XRES_MIN   320
  33 #define YRES_MIN   200
  34
  35 #define XRES_DEF  1024
  36 #define YRES_DEF   768
  37
  38 #define XRES_MAX  8192
  39 #define YRES_MAX  8192
  40
  41 static void virtio_gpu_crtc_gamma_set(struct drm_crtc *crtc,
  42                                       u16 *red, u16 *green, u16 *blue,
  43                                       uint32_t start, uint32_t size)
  44 {
  45         /* TODO */
  46 }
  47
  48 static void
  49 virtio_gpu_hide_cursor(struct virtio_gpu_device *vgdev,
  50                        struct virtio_gpu_output *output)
  51 {
  52         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
  53         output->cursor.resource_id = 0;
  54         virtio_gpu_cursor_ping(vgdev, output);
  55 }
  56
  57 static int virtio_gpu_crtc_cursor_set(struct drm_crtc *crtc,
  58                                       struct drm_file *file_priv,
  59                                       uint32_t handle,
  60                                       uint32_t width,
  61                                       uint32_t height,
  62                                       int32_t hot_x, int32_t hot_y)
  63 {
  64         struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
  65         struct virtio_gpu_output *output =
  66                 container_of(crtc, struct virtio_gpu_output, crtc);
  67         struct drm_gem_object *gobj = NULL;
  68         struct virtio_gpu_object *qobj = NULL;
  69         struct virtio_gpu_fence *fence = NULL;
  70         int ret = 0;
  71
  72         if (handle == 0) {
  73                 virtio_gpu_hide_cursor(vgdev, output);
  74                 return 0;
  75         }
  76
  77         /* lookup the cursor */
  78         gobj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
  79         if (gobj == NULL)
  80                 return -ENOENT;
  81
  82         qobj = gem_to_virtio_gpu_obj(gobj);
  83
  84         if (!qobj->hw_res_handle) {
  85                 ret = -EINVAL;
  86                 goto out;
  87         }
  88
  89         virtio_gpu_cmd_transfer_to_host_2d(vgdev, qobj->hw_res_handle, 0,
  90                                            cpu_to_le32(64),
  91                                            cpu_to_le32(64),
  92                                            0, 0, &fence);
  93         ret = virtio_gpu_object_reserve(qobj, false);
  94         if (!ret) {
  95                 reservation_object_add_excl_fence(qobj->tbo.resv,
  96                                                   &fence->f);
  97                 fence_put(&fence->f);
  98                 virtio_gpu_object_unreserve(qobj);
  99                 virtio_gpu_object_wait(qobj, false);
 100         }
 101
 102         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 103         output->cursor.resource_id = cpu_to_le32(qobj->hw_res_handle);
 104         output->cursor.hot_x = cpu_to_le32(hot_x);
 105         output->cursor.hot_y = cpu_to_le32(hot_y);
 106         virtio_gpu_cursor_ping(vgdev, output);
 107         ret = 0;
 108
 109 out:
 110         drm_gem_object_unreference_unlocked(gobj);
 111         return ret;
 112 }
 113
 114 static int virtio_gpu_crtc_cursor_move(struct drm_crtc *crtc,
 115                                     int x, int y)
 116 {
 117         struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
 118         struct virtio_gpu_output *output =
 119                 container_of(crtc, struct virtio_gpu_output, crtc);
 120
 121         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 122         output->cursor.pos.x = cpu_to_le32(x);
 123         output->cursor.pos.y = cpu_to_le32(y);
 124         virtio_gpu_cursor_ping(vgdev, output);
 125         return 0;
 126 }
 127
 128 static int virtio_gpu_page_flip(struct drm_crtc *crtc,
 129                                 struct drm_framebuffer *fb,
 130                                 struct drm_pending_vblank_event *event,
 131                                 uint32_t flags)
 132 {
 133         struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
 134         struct virtio_gpu_output *output =
 135                 container_of(crtc, struct virtio_gpu_output, crtc);
 136         struct drm_plane *plane = crtc->primary;
 137         struct virtio_gpu_framebuffer *vgfb;
 138         struct virtio_gpu_object *bo;
 139         unsigned long irqflags;
 140         uint32_t handle;
 141
 142         plane->fb = fb;
 143         vgfb = to_virtio_gpu_framebuffer(plane->fb);
 144         bo = gem_to_virtio_gpu_obj(vgfb->obj);
 145         handle = bo->hw_res_handle;
 146
 147         DRM_DEBUG("handle 0x%x%s, crtc %dx%d\n", handle,
 148                   bo->dumb ? ", dumb" : "",
 149                   crtc->mode.hdisplay, crtc->mode.vdisplay);
 150         if (bo->dumb) {
 151                 virtio_gpu_cmd_transfer_to_host_2d
 152                         (vgdev, handle, 0,
 153                          cpu_to_le32(crtc->mode.hdisplay),
 154                          cpu_to_le32(crtc->mode.vdisplay),
 155                          0, 0, NULL);
 156         }
 157         virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
 158                                    crtc->mode.hdisplay,
 159                                    crtc->mode.vdisplay, 0, 0);
 160         virtio_gpu_cmd_resource_flush(vgdev, handle, 0, 0,
 161                                       crtc->mode.hdisplay,
 162                                       crtc->mode.vdisplay);
 163
 164         if (event) {
 165                 spin_lock_irqsave(&crtc->dev->event_lock, irqflags);
 166                 drm_send_vblank_event(crtc->dev, -1, event);
 167                 spin_unlock_irqrestore(&crtc->dev->event_lock, irqflags);
 168         }
 169
 170         return 0;
 171 }
 172
 173 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
 174         .cursor_set2            = virtio_gpu_crtc_cursor_set,
 175         .cursor_move            = virtio_gpu_crtc_cursor_move,
 176         .gamma_set              = virtio_gpu_crtc_gamma_set,
 177         .set_config             = drm_atomic_helper_set_config,
 178         .destroy                = drm_crtc_cleanup,
 179
 180         .page_flip              = virtio_gpu_page_flip,
 181         .reset                  = drm_atomic_helper_crtc_reset,
 182         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 183         .atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
 184 };
 185
 186 static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 187 {
 188         struct virtio_gpu_framebuffer *virtio_gpu_fb
 189                 = to_virtio_gpu_framebuffer(fb);
 190
 191         if (virtio_gpu_fb->obj)
 192                 drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
 193         drm_framebuffer_cleanup(fb);
 194         kfree(virtio_gpu_fb);
 195 }
 196
 197 static int
 198 virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
 199                                      struct drm_file *file_priv,
 200                                      unsigned flags, unsigned color,
 201                                      struct drm_clip_rect *clips,
 202                                      unsigned num_clips)
 203 {
 204         struct virtio_gpu_framebuffer *virtio_gpu_fb
 205                 = to_virtio_gpu_framebuffer(fb);
 206
 207         return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
 208 }
 209
 210 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
 211         .destroy = virtio_gpu_user_framebuffer_destroy,
 212         .dirty = virtio_gpu_framebuffer_surface_dirty,
 213 };
 214
 215 int
 216 virtio_gpu_framebuffer_init(struct drm_device *dev,
 217                             struct virtio_gpu_framebuffer *vgfb,
 218                             const struct drm_mode_fb_cmd2 *mode_cmd,
 219                             struct drm_gem_object *obj)
 220 {
 221         int ret;
 222         struct virtio_gpu_object *bo;
 223         vgfb->obj = obj;
 224
 225         bo = gem_to_virtio_gpu_obj(obj);
 226
 227         ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
 228         if (ret) {
 229                 vgfb->obj = NULL;
 230                 return ret;
 231         }
 232         drm_helper_mode_fill_fb_struct(&vgfb->base, mode_cmd);
 233
 234         spin_lock_init(&vgfb->dirty_lock);
 235         vgfb->x1 = vgfb->y1 = INT_MAX;
 236         vgfb->x2 = vgfb->y2 = 0;
 237         return 0;
 238 }
 239
 240 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 241 {
 242         struct drm_device *dev = crtc->dev;
 243         struct virtio_gpu_device *vgdev = dev->dev_private;
 244         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 245
 246         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 247                                    crtc->mode.hdisplay,
 248                                    crtc->mode.vdisplay, 0, 0);
 249 }
 250
 251 static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
 252 {
 253 }
 254
 255 static void virtio_gpu_crtc_disable(struct drm_crtc *crtc)
 256 {
 257         struct drm_device *dev = crtc->dev;
 258         struct virtio_gpu_device *vgdev = dev->dev_private;
 259         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 260
 261         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
 262 }
 263
 264 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
 265                                         struct drm_crtc_state *state)
 266 {
 267         return 0;
 268 }
 269
 270 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
 271                                          struct drm_crtc_state *old_state)
 272 {
 273         unsigned long flags;
 274
 275         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 276         if (crtc->state->event)
 277                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
 278         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 279 }
 280
 281 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
 282         .enable        = virtio_gpu_crtc_enable,
 283         .disable       = virtio_gpu_crtc_disable,
 284         .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
 285         .atomic_check  = virtio_gpu_crtc_atomic_check,
 286         .atomic_flush  = virtio_gpu_crtc_atomic_flush,
 287 };
 288
 289 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
 290                                     struct drm_display_mode *mode,
 291                                     struct drm_display_mode *adjusted_mode)
 292 {
 293 }
 294
 295 static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
 296 {
 297 }
 298
 299 static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
 300 {
 301 }
 302
 303 static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
 304 {
 305         struct virtio_gpu_output *output =
 306                 drm_connector_to_virtio_gpu_output(connector);
 307         struct drm_display_mode *mode = NULL;
 308         int count, width, height;
 309
 310         width  = le32_to_cpu(output->info.r.width);
 311         height = le32_to_cpu(output->info.r.height);
 312         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
 313
 314         if (width == 0 || height == 0) {
 315                 width = XRES_DEF;
 316                 height = YRES_DEF;
 317                 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
 318         } else {
 319                 DRM_DEBUG("add mode: %dx%d\n", width, height);
 320                 mode = drm_cvt_mode(connector->dev, width, height, 60,
 321                                     false, false, false);
 322                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 323                 drm_mode_probed_add(connector, mode);
 324                 count++;
 325         }
 326
 327         return count;
 328 }
 329
 330 static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
 331                                       struct drm_display_mode *mode)
 332 {
 333         struct virtio_gpu_output *output =
 334                 drm_connector_to_virtio_gpu_output(connector);
 335         int width, height;
 336
 337         width  = le32_to_cpu(output->info.r.width);
 338         height = le32_to_cpu(output->info.r.height);
 339
 340         if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
 341                 return MODE_OK;
 342         if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
 343                 return MODE_OK;
 344         if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&
 345             mode->vdisplay <= height && mode->vdisplay >= height - 16)
 346                 return MODE_OK;
 347
 348         DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
 349         return MODE_BAD;
 350 }
 351
 352 static struct drm_encoder*
 353 virtio_gpu_best_encoder(struct drm_connector *connector)
 354 {
 355         struct virtio_gpu_output *virtio_gpu_output =
 356                 drm_connector_to_virtio_gpu_output(connector);
 357
 358         return &virtio_gpu_output->enc;
 359 }
 360
 361 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
 362         .mode_set   = virtio_gpu_enc_mode_set,
 363         .enable     = virtio_gpu_enc_enable,
 364         .disable    = virtio_gpu_enc_disable,
 365 };
 366
 367 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
 368         .get_modes    = virtio_gpu_conn_get_modes,
 369         .mode_valid   = virtio_gpu_conn_mode_valid,
 370         .best_encoder = virtio_gpu_best_encoder,
 371 };
 372
 373 static enum drm_connector_status virtio_gpu_conn_detect(
 374                         struct drm_connector *connector,
 375                         bool force)
 376 {
 377         struct virtio_gpu_output *output =
 378                 drm_connector_to_virtio_gpu_output(connector);
 379
 380         if (output->info.enabled)
 381                 return connector_status_connected;
 382         else
 383                 return connector_status_disconnected;
 384 }
 385
 386 static void virtio_gpu_conn_destroy(struct drm_connector *connector)
 387 {
 388         struct virtio_gpu_output *virtio_gpu_output =
 389                 drm_connector_to_virtio_gpu_output(connector);
 390
 391         drm_connector_unregister(connector);
 392         drm_connector_cleanup(connector);
 393         kfree(virtio_gpu_output);
 394 }
 395
 396 static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
 397         .dpms = drm_atomic_helper_connector_dpms,
 398         .detect = virtio_gpu_conn_detect,
 399         .fill_modes = drm_helper_probe_single_connector_modes,
 400         .destroy = virtio_gpu_conn_destroy,
 401         .reset = drm_atomic_helper_connector_reset,
 402         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 403         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 404 };
 405
 406 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
 407         .destroy = drm_encoder_cleanup,
 408 };
 409
 410 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
 411 {
 412         struct drm_device *dev = vgdev->ddev;
 413         struct virtio_gpu_output *output = vgdev->outputs + index;
 414         struct drm_connector *connector = &output->conn;
 415         struct drm_encoder *encoder = &output->enc;
 416         struct drm_crtc *crtc = &output->crtc;
 417         struct drm_plane *plane;
 418
 419         output->index = index;
 420         if (index == 0) {
 421                 output->info.enabled = cpu_to_le32(true);
 422                 output->info.r.width = cpu_to_le32(XRES_DEF);
 423                 output->info.r.height = cpu_to_le32(YRES_DEF);
 424         }
 425
 426         plane = virtio_gpu_plane_init(vgdev, index);
 427         if (IS_ERR(plane))
 428                 return PTR_ERR(plane);
 429         drm_crtc_init_with_planes(dev, crtc, plane, NULL,
 430                                   &virtio_gpu_crtc_funcs, NULL);
 431         drm_mode_crtc_set_gamma_size(crtc, 256);
 432         drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
 433         plane->crtc = crtc;
 434
 435         drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
 436                            DRM_MODE_CONNECTOR_VIRTUAL);
 437         drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
 438
 439         drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
 440                          DRM_MODE_ENCODER_VIRTUAL, NULL);
 441         drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
 442         encoder->possible_crtcs = 1 << index;
 443
 444         drm_mode_connector_attach_encoder(connector, encoder);
 445         drm_connector_register(connector);
 446         return 0;
 447 }
 448
 449 static struct drm_framebuffer *
 450 virtio_gpu_user_framebuffer_create(struct drm_device *dev,
 451                                    struct drm_file *file_priv,
 452                                    const struct drm_mode_fb_cmd2 *mode_cmd)
 453 {
 454         struct drm_gem_object *obj = NULL;
 455         struct virtio_gpu_framebuffer *virtio_gpu_fb;
 456         int ret;
 457
 458         /* lookup object associated with res handle */
 459         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 460         if (!obj)
 461                 return ERR_PTR(-EINVAL);
 462
 463         virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
 464         if (virtio_gpu_fb == NULL)
 465                 return ERR_PTR(-ENOMEM);
 466
 467         ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
 468         if (ret) {
 469                 kfree(virtio_gpu_fb);
 470                 if (obj)
 471                         drm_gem_object_unreference_unlocked(obj);
 472                 return NULL;
 473         }
 474
 475         return &virtio_gpu_fb->base;
 476 }
 477
 478 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
 479         .fb_create = virtio_gpu_user_framebuffer_create,
 480         .atomic_check = drm_atomic_helper_check,
 481         .atomic_commit = drm_atomic_helper_commit,
 482 };
 483
 484 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 485 {
 486         int i;
 487
 488         drm_mode_config_init(vgdev->ddev);
 489         vgdev->ddev->mode_config.funcs = (void *)&virtio_gpu_mode_funcs;
 490
 491         /* modes will be validated against the framebuffer size */
 492         vgdev->ddev->mode_config.min_width = XRES_MIN;
 493         vgdev->ddev->mode_config.min_height = YRES_MIN;
 494         vgdev->ddev->mode_config.max_width = XRES_MAX;
 495         vgdev->ddev->mode_config.max_height = YRES_MAX;
 496
 497         for (i = 0 ; i < vgdev->num_scanouts; ++i)
 498                 vgdev_output_init(vgdev, i);
 499
 500         drm_mode_config_reset(vgdev->ddev);
 501         return 0;
 502 }
 503
 504 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
 505 {
 506         virtio_gpu_fbdev_fini(vgdev);
 507         drm_mode_config_cleanup(vgdev->ddev);
 508 }