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