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 const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 271 .enable = virtio_gpu_crtc_enable, 272 .disable = virtio_gpu_crtc_disable, 273 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 274 .atomic_check = virtio_gpu_crtc_atomic_check, 275 }; 276 277 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 278 struct drm_display_mode *mode, 279 struct drm_display_mode *adjusted_mode) 280 { 281 } 282 283 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 284 { 285 } 286 287 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 288 { 289 } 290 291 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 292 { 293 struct virtio_gpu_output *output = 294 drm_connector_to_virtio_gpu_output(connector); 295 struct drm_display_mode *mode = NULL; 296 int count, width, height; 297 298 width = le32_to_cpu(output->info.r.width); 299 height = le32_to_cpu(output->info.r.height); 300 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 301 302 if (width == 0 || height == 0) { 303 width = XRES_DEF; 304 height = YRES_DEF; 305 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 306 } else { 307 DRM_DEBUG("add mode: %dx%d\n", width, height); 308 mode = drm_cvt_mode(connector->dev, width, height, 60, 309 false, false, false); 310 mode->type |= DRM_MODE_TYPE_PREFERRED; 311 drm_mode_probed_add(connector, mode); 312 count++; 313 } 314 315 return count; 316 } 317 318 static int virtio_gpu_conn_mode_valid(struct drm_connector *connector, 319 struct drm_display_mode *mode) 320 { 321 struct virtio_gpu_output *output = 322 drm_connector_to_virtio_gpu_output(connector); 323 int width, height; 324 325 width = le32_to_cpu(output->info.r.width); 326 height = le32_to_cpu(output->info.r.height); 327 328 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 329 return MODE_OK; 330 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 331 return MODE_OK; 332 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 333 mode->vdisplay <= height && mode->vdisplay >= height - 16) 334 return MODE_OK; 335 336 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 337 return MODE_BAD; 338 } 339 340 static struct drm_encoder* 341 virtio_gpu_best_encoder(struct drm_connector *connector) 342 { 343 struct virtio_gpu_output *virtio_gpu_output = 344 drm_connector_to_virtio_gpu_output(connector); 345 346 return &virtio_gpu_output->enc; 347 } 348 349 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 350 .mode_set = virtio_gpu_enc_mode_set, 351 .enable = virtio_gpu_enc_enable, 352 .disable = virtio_gpu_enc_disable, 353 }; 354 355 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 356 .get_modes = virtio_gpu_conn_get_modes, 357 .mode_valid = virtio_gpu_conn_mode_valid, 358 .best_encoder = virtio_gpu_best_encoder, 359 }; 360 361 static enum drm_connector_status virtio_gpu_conn_detect( 362 struct drm_connector *connector, 363 bool force) 364 { 365 struct virtio_gpu_output *output = 366 drm_connector_to_virtio_gpu_output(connector); 367 368 if (output->info.enabled) 369 return connector_status_connected; 370 else 371 return connector_status_disconnected; 372 } 373 374 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 375 { 376 struct virtio_gpu_output *virtio_gpu_output = 377 drm_connector_to_virtio_gpu_output(connector); 378 379 drm_connector_unregister(connector); 380 drm_connector_cleanup(connector); 381 kfree(virtio_gpu_output); 382 } 383 384 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 385 .dpms = drm_atomic_helper_connector_dpms, 386 .detect = virtio_gpu_conn_detect, 387 .fill_modes = drm_helper_probe_single_connector_modes, 388 .destroy = virtio_gpu_conn_destroy, 389 .reset = drm_atomic_helper_connector_reset, 390 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 391 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 392 }; 393 394 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { 395 .destroy = drm_encoder_cleanup, 396 }; 397 398 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 399 { 400 struct drm_device *dev = vgdev->ddev; 401 struct virtio_gpu_output *output = vgdev->outputs + index; 402 struct drm_connector *connector = &output->conn; 403 struct drm_encoder *encoder = &output->enc; 404 struct drm_crtc *crtc = &output->crtc; 405 struct drm_plane *plane; 406 407 output->index = index; 408 if (index == 0) { 409 output->info.enabled = cpu_to_le32(true); 410 output->info.r.width = cpu_to_le32(XRES_DEF); 411 output->info.r.height = cpu_to_le32(YRES_DEF); 412 } 413 414 plane = virtio_gpu_plane_init(vgdev, index); 415 if (IS_ERR(plane)) 416 return PTR_ERR(plane); 417 drm_crtc_init_with_planes(dev, crtc, plane, NULL, 418 &virtio_gpu_crtc_funcs, NULL); 419 drm_mode_crtc_set_gamma_size(crtc, 256); 420 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 421 plane->crtc = crtc; 422 423 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 424 DRM_MODE_CONNECTOR_VIRTUAL); 425 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 426 427 drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, 428 DRM_MODE_ENCODER_VIRTUAL, NULL); 429 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 430 encoder->possible_crtcs = 1 << index; 431 432 drm_mode_connector_attach_encoder(connector, encoder); 433 drm_connector_register(connector); 434 return 0; 435 } 436 437 static struct drm_framebuffer * 438 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 439 struct drm_file *file_priv, 440 const struct drm_mode_fb_cmd2 *mode_cmd) 441 { 442 struct drm_gem_object *obj = NULL; 443 struct virtio_gpu_framebuffer *virtio_gpu_fb; 444 int ret; 445 446 /* lookup object associated with res handle */ 447 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); 448 if (!obj) 449 return ERR_PTR(-EINVAL); 450 451 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); 452 if (virtio_gpu_fb == NULL) 453 return ERR_PTR(-ENOMEM); 454 455 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); 456 if (ret) { 457 kfree(virtio_gpu_fb); 458 if (obj) 459 drm_gem_object_unreference_unlocked(obj); 460 return NULL; 461 } 462 463 return &virtio_gpu_fb->base; 464 } 465 466 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 467 .fb_create = virtio_gpu_user_framebuffer_create, 468 .atomic_check = drm_atomic_helper_check, 469 .atomic_commit = drm_atomic_helper_commit, 470 }; 471 472 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 473 { 474 int i; 475 476 drm_mode_config_init(vgdev->ddev); 477 vgdev->ddev->mode_config.funcs = (void *)&virtio_gpu_mode_funcs; 478 479 /* modes will be validated against the framebuffer size */ 480 vgdev->ddev->mode_config.min_width = XRES_MIN; 481 vgdev->ddev->mode_config.min_height = YRES_MIN; 482 vgdev->ddev->mode_config.max_width = XRES_MAX; 483 vgdev->ddev->mode_config.max_height = YRES_MAX; 484 485 for (i = 0 ; i < vgdev->num_scanouts; ++i) 486 vgdev_output_init(vgdev, i); 487 488 drm_mode_config_reset(vgdev->ddev); 489 return 0; 490 } 491 492 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 493 { 494 virtio_gpu_fbdev_fini(vgdev); 495 drm_mode_config_cleanup(vgdev->ddev); 496 } 497