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