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