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 32 33 #define YRES_MIN 32 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 const struct drm_crtc_funcs virtio_gpu_crtc_funcs = { 42 .set_config = drm_atomic_helper_set_config, 43 .destroy = drm_crtc_cleanup, 44 45 .page_flip = drm_atomic_helper_page_flip, 46 .reset = drm_atomic_helper_crtc_reset, 47 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 48 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 49 }; 50 51 static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb) 52 { 53 struct virtio_gpu_framebuffer *virtio_gpu_fb 54 = to_virtio_gpu_framebuffer(fb); 55 56 drm_gem_object_put_unlocked(virtio_gpu_fb->obj); 57 drm_framebuffer_cleanup(fb); 58 kfree(virtio_gpu_fb); 59 } 60 61 static int 62 virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb, 63 struct drm_file *file_priv, 64 unsigned int flags, unsigned int color, 65 struct drm_clip_rect *clips, 66 unsigned int num_clips) 67 { 68 struct virtio_gpu_framebuffer *virtio_gpu_fb 69 = to_virtio_gpu_framebuffer(fb); 70 71 return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips); 72 } 73 74 static int 75 virtio_gpu_framebuffer_create_handle(struct drm_framebuffer *fb, 76 struct drm_file *file_priv, 77 unsigned int *handle) 78 { 79 struct virtio_gpu_framebuffer *virtio_gpu_fb = 80 to_virtio_gpu_framebuffer(fb); 81 82 return drm_gem_handle_create(file_priv, virtio_gpu_fb->obj, handle); 83 } 84 85 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = { 86 .create_handle = virtio_gpu_framebuffer_create_handle, 87 .destroy = virtio_gpu_user_framebuffer_destroy, 88 .dirty = virtio_gpu_framebuffer_surface_dirty, 89 }; 90 91 int 92 virtio_gpu_framebuffer_init(struct drm_device *dev, 93 struct virtio_gpu_framebuffer *vgfb, 94 const struct drm_mode_fb_cmd2 *mode_cmd, 95 struct drm_gem_object *obj) 96 { 97 int ret; 98 struct virtio_gpu_object *bo; 99 100 vgfb->obj = obj; 101 102 bo = gem_to_virtio_gpu_obj(obj); 103 104 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); 105 106 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); 107 if (ret) { 108 vgfb->obj = NULL; 109 return ret; 110 } 111 112 spin_lock_init(&vgfb->dirty_lock); 113 vgfb->x1 = vgfb->y1 = INT_MAX; 114 vgfb->x2 = vgfb->y2 = 0; 115 return 0; 116 } 117 118 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) 119 { 120 struct drm_device *dev = crtc->dev; 121 struct virtio_gpu_device *vgdev = dev->dev_private; 122 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 123 124 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 125 crtc->mode.hdisplay, 126 crtc->mode.vdisplay, 0, 0); 127 } 128 129 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, 130 struct drm_crtc_state *old_state) 131 { 132 } 133 134 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, 135 struct drm_crtc_state *old_state) 136 { 137 struct drm_device *dev = crtc->dev; 138 struct virtio_gpu_device *vgdev = dev->dev_private; 139 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 140 141 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); 142 } 143 144 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, 145 struct drm_crtc_state *state) 146 { 147 return 0; 148 } 149 150 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, 151 struct drm_crtc_state *old_state) 152 { 153 unsigned long flags; 154 155 spin_lock_irqsave(&crtc->dev->event_lock, flags); 156 if (crtc->state->event) 157 drm_crtc_send_vblank_event(crtc, crtc->state->event); 158 crtc->state->event = NULL; 159 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 160 } 161 162 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 163 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 164 .atomic_check = virtio_gpu_crtc_atomic_check, 165 .atomic_flush = virtio_gpu_crtc_atomic_flush, 166 .atomic_enable = virtio_gpu_crtc_atomic_enable, 167 .atomic_disable = virtio_gpu_crtc_atomic_disable, 168 }; 169 170 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 171 struct drm_display_mode *mode, 172 struct drm_display_mode *adjusted_mode) 173 { 174 } 175 176 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 177 { 178 } 179 180 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 181 { 182 } 183 184 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 185 { 186 struct virtio_gpu_output *output = 187 drm_connector_to_virtio_gpu_output(connector); 188 struct drm_display_mode *mode = NULL; 189 int count, width, height; 190 191 width = le32_to_cpu(output->info.r.width); 192 height = le32_to_cpu(output->info.r.height); 193 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 194 195 if (width == 0 || height == 0) { 196 width = XRES_DEF; 197 height = YRES_DEF; 198 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 199 } else { 200 DRM_DEBUG("add mode: %dx%d\n", width, height); 201 mode = drm_cvt_mode(connector->dev, width, height, 60, 202 false, false, false); 203 mode->type |= DRM_MODE_TYPE_PREFERRED; 204 drm_mode_probed_add(connector, mode); 205 count++; 206 } 207 208 return count; 209 } 210 211 static int virtio_gpu_conn_mode_valid(struct drm_connector *connector, 212 struct drm_display_mode *mode) 213 { 214 struct virtio_gpu_output *output = 215 drm_connector_to_virtio_gpu_output(connector); 216 int width, height; 217 218 width = le32_to_cpu(output->info.r.width); 219 height = le32_to_cpu(output->info.r.height); 220 221 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 222 return MODE_OK; 223 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 224 return MODE_OK; 225 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 226 mode->vdisplay <= height && mode->vdisplay >= height - 16) 227 return MODE_OK; 228 229 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 230 return MODE_BAD; 231 } 232 233 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 234 .mode_set = virtio_gpu_enc_mode_set, 235 .enable = virtio_gpu_enc_enable, 236 .disable = virtio_gpu_enc_disable, 237 }; 238 239 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 240 .get_modes = virtio_gpu_conn_get_modes, 241 .mode_valid = virtio_gpu_conn_mode_valid, 242 }; 243 244 static enum drm_connector_status virtio_gpu_conn_detect( 245 struct drm_connector *connector, 246 bool force) 247 { 248 struct virtio_gpu_output *output = 249 drm_connector_to_virtio_gpu_output(connector); 250 251 if (output->info.enabled) 252 return connector_status_connected; 253 else 254 return connector_status_disconnected; 255 } 256 257 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 258 { 259 struct virtio_gpu_output *virtio_gpu_output = 260 drm_connector_to_virtio_gpu_output(connector); 261 262 drm_connector_unregister(connector); 263 drm_connector_cleanup(connector); 264 kfree(virtio_gpu_output); 265 } 266 267 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 268 .detect = virtio_gpu_conn_detect, 269 .fill_modes = drm_helper_probe_single_connector_modes, 270 .destroy = virtio_gpu_conn_destroy, 271 .reset = drm_atomic_helper_connector_reset, 272 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 273 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 274 }; 275 276 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { 277 .destroy = drm_encoder_cleanup, 278 }; 279 280 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 281 { 282 struct drm_device *dev = vgdev->ddev; 283 struct virtio_gpu_output *output = vgdev->outputs + index; 284 struct drm_connector *connector = &output->conn; 285 struct drm_encoder *encoder = &output->enc; 286 struct drm_crtc *crtc = &output->crtc; 287 struct drm_plane *primary, *cursor; 288 289 output->index = index; 290 if (index == 0) { 291 output->info.enabled = cpu_to_le32(true); 292 output->info.r.width = cpu_to_le32(XRES_DEF); 293 output->info.r.height = cpu_to_le32(YRES_DEF); 294 } 295 296 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); 297 if (IS_ERR(primary)) 298 return PTR_ERR(primary); 299 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); 300 if (IS_ERR(cursor)) 301 return PTR_ERR(cursor); 302 drm_crtc_init_with_planes(dev, crtc, primary, cursor, 303 &virtio_gpu_crtc_funcs, NULL); 304 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 305 primary->crtc = crtc; 306 cursor->crtc = crtc; 307 308 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 309 DRM_MODE_CONNECTOR_VIRTUAL); 310 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 311 312 drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, 313 DRM_MODE_ENCODER_VIRTUAL, NULL); 314 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 315 encoder->possible_crtcs = 1 << index; 316 317 drm_mode_connector_attach_encoder(connector, encoder); 318 drm_connector_register(connector); 319 return 0; 320 } 321 322 static struct drm_framebuffer * 323 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 324 struct drm_file *file_priv, 325 const struct drm_mode_fb_cmd2 *mode_cmd) 326 { 327 struct drm_gem_object *obj = NULL; 328 struct virtio_gpu_framebuffer *virtio_gpu_fb; 329 int ret; 330 331 /* lookup object associated with res handle */ 332 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); 333 if (!obj) 334 return ERR_PTR(-EINVAL); 335 336 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); 337 if (virtio_gpu_fb == NULL) 338 return ERR_PTR(-ENOMEM); 339 340 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); 341 if (ret) { 342 kfree(virtio_gpu_fb); 343 drm_gem_object_put_unlocked(obj); 344 return NULL; 345 } 346 347 return &virtio_gpu_fb->base; 348 } 349 350 static void vgdev_atomic_commit_tail(struct drm_atomic_state *state) 351 { 352 struct drm_device *dev = state->dev; 353 354 drm_atomic_helper_commit_modeset_disables(dev, state); 355 drm_atomic_helper_commit_modeset_enables(dev, state); 356 drm_atomic_helper_commit_planes(dev, state, 0); 357 358 drm_atomic_helper_commit_hw_done(state); 359 360 drm_atomic_helper_wait_for_vblanks(dev, state); 361 drm_atomic_helper_cleanup_planes(dev, state); 362 } 363 364 static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = { 365 .atomic_commit_tail = vgdev_atomic_commit_tail, 366 }; 367 368 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 369 .fb_create = virtio_gpu_user_framebuffer_create, 370 .atomic_check = drm_atomic_helper_check, 371 .atomic_commit = drm_atomic_helper_commit, 372 }; 373 374 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 375 { 376 int i; 377 378 drm_mode_config_init(vgdev->ddev); 379 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; 380 vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers; 381 382 /* modes will be validated against the framebuffer size */ 383 vgdev->ddev->mode_config.min_width = XRES_MIN; 384 vgdev->ddev->mode_config.min_height = YRES_MIN; 385 vgdev->ddev->mode_config.max_width = XRES_MAX; 386 vgdev->ddev->mode_config.max_height = YRES_MAX; 387 388 for (i = 0 ; i < vgdev->num_scanouts; ++i) 389 vgdev_output_init(vgdev, i); 390 391 drm_mode_config_reset(vgdev->ddev); 392 return 0; 393 } 394 395 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 396 { 397 virtio_gpu_fbdev_fini(vgdev); 398 drm_mode_config_cleanup(vgdev->ddev); 399 } 400