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