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 #include <drm/drm_gem_framebuffer_helper.h> 32 33 #define XRES_MIN 32 34 #define YRES_MIN 32 35 36 #define XRES_DEF 1024 37 #define YRES_DEF 768 38 39 #define XRES_MAX 8192 40 #define YRES_MAX 8192 41 42 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = { 43 .set_config = drm_atomic_helper_set_config, 44 .destroy = drm_crtc_cleanup, 45 46 .page_flip = drm_atomic_helper_page_flip, 47 .reset = drm_atomic_helper_crtc_reset, 48 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 49 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 50 }; 51 52 static int 53 virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb, 54 struct drm_file *file_priv, 55 unsigned int flags, unsigned int color, 56 struct drm_clip_rect *clips, 57 unsigned int num_clips) 58 { 59 struct virtio_gpu_framebuffer *virtio_gpu_fb 60 = to_virtio_gpu_framebuffer(fb); 61 62 return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips); 63 } 64 65 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = { 66 .create_handle = drm_gem_fb_create_handle, 67 .destroy = drm_gem_fb_destroy, 68 .dirty = virtio_gpu_framebuffer_surface_dirty, 69 }; 70 71 int 72 virtio_gpu_framebuffer_init(struct drm_device *dev, 73 struct virtio_gpu_framebuffer *vgfb, 74 const struct drm_mode_fb_cmd2 *mode_cmd, 75 struct drm_gem_object *obj) 76 { 77 int ret; 78 struct virtio_gpu_object *bo; 79 80 vgfb->base.obj[0] = obj; 81 82 bo = gem_to_virtio_gpu_obj(obj); 83 84 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); 85 86 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); 87 if (ret) { 88 vgfb->base.obj[0] = NULL; 89 return ret; 90 } 91 92 spin_lock_init(&vgfb->dirty_lock); 93 vgfb->x1 = vgfb->y1 = INT_MAX; 94 vgfb->x2 = vgfb->y2 = 0; 95 return 0; 96 } 97 98 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) 99 { 100 struct drm_device *dev = crtc->dev; 101 struct virtio_gpu_device *vgdev = dev->dev_private; 102 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 103 104 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 105 crtc->mode.hdisplay, 106 crtc->mode.vdisplay, 0, 0); 107 } 108 109 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, 110 struct drm_crtc_state *old_state) 111 { 112 } 113 114 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, 115 struct drm_crtc_state *old_state) 116 { 117 struct drm_device *dev = crtc->dev; 118 struct virtio_gpu_device *vgdev = dev->dev_private; 119 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 120 121 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); 122 } 123 124 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, 125 struct drm_crtc_state *state) 126 { 127 return 0; 128 } 129 130 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, 131 struct drm_crtc_state *old_state) 132 { 133 unsigned long flags; 134 135 spin_lock_irqsave(&crtc->dev->event_lock, flags); 136 if (crtc->state->event) 137 drm_crtc_send_vblank_event(crtc, crtc->state->event); 138 crtc->state->event = NULL; 139 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 140 } 141 142 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 143 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 144 .atomic_check = virtio_gpu_crtc_atomic_check, 145 .atomic_flush = virtio_gpu_crtc_atomic_flush, 146 .atomic_enable = virtio_gpu_crtc_atomic_enable, 147 .atomic_disable = virtio_gpu_crtc_atomic_disable, 148 }; 149 150 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 151 struct drm_display_mode *mode, 152 struct drm_display_mode *adjusted_mode) 153 { 154 } 155 156 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 157 { 158 } 159 160 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 161 { 162 } 163 164 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 165 { 166 struct virtio_gpu_output *output = 167 drm_connector_to_virtio_gpu_output(connector); 168 struct drm_display_mode *mode = NULL; 169 int count, width, height; 170 171 width = le32_to_cpu(output->info.r.width); 172 height = le32_to_cpu(output->info.r.height); 173 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 174 175 if (width == 0 || height == 0) { 176 width = XRES_DEF; 177 height = YRES_DEF; 178 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 179 } else { 180 DRM_DEBUG("add mode: %dx%d\n", width, height); 181 mode = drm_cvt_mode(connector->dev, width, height, 60, 182 false, false, false); 183 mode->type |= DRM_MODE_TYPE_PREFERRED; 184 drm_mode_probed_add(connector, mode); 185 count++; 186 } 187 188 return count; 189 } 190 191 static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector, 192 struct drm_display_mode *mode) 193 { 194 struct virtio_gpu_output *output = 195 drm_connector_to_virtio_gpu_output(connector); 196 int width, height; 197 198 width = le32_to_cpu(output->info.r.width); 199 height = le32_to_cpu(output->info.r.height); 200 201 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 202 return MODE_OK; 203 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 204 return MODE_OK; 205 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 206 mode->vdisplay <= height && mode->vdisplay >= height - 16) 207 return MODE_OK; 208 209 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 210 return MODE_BAD; 211 } 212 213 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 214 .mode_set = virtio_gpu_enc_mode_set, 215 .enable = virtio_gpu_enc_enable, 216 .disable = virtio_gpu_enc_disable, 217 }; 218 219 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 220 .get_modes = virtio_gpu_conn_get_modes, 221 .mode_valid = virtio_gpu_conn_mode_valid, 222 }; 223 224 static enum drm_connector_status virtio_gpu_conn_detect( 225 struct drm_connector *connector, 226 bool force) 227 { 228 struct virtio_gpu_output *output = 229 drm_connector_to_virtio_gpu_output(connector); 230 231 if (output->info.enabled) 232 return connector_status_connected; 233 else 234 return connector_status_disconnected; 235 } 236 237 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 238 { 239 struct virtio_gpu_output *virtio_gpu_output = 240 drm_connector_to_virtio_gpu_output(connector); 241 242 drm_connector_unregister(connector); 243 drm_connector_cleanup(connector); 244 kfree(virtio_gpu_output); 245 } 246 247 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 248 .detect = virtio_gpu_conn_detect, 249 .fill_modes = drm_helper_probe_single_connector_modes, 250 .destroy = virtio_gpu_conn_destroy, 251 .reset = drm_atomic_helper_connector_reset, 252 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 253 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 254 }; 255 256 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { 257 .destroy = drm_encoder_cleanup, 258 }; 259 260 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 261 { 262 struct drm_device *dev = vgdev->ddev; 263 struct virtio_gpu_output *output = vgdev->outputs + index; 264 struct drm_connector *connector = &output->conn; 265 struct drm_encoder *encoder = &output->enc; 266 struct drm_crtc *crtc = &output->crtc; 267 struct drm_plane *primary, *cursor; 268 269 output->index = index; 270 if (index == 0) { 271 output->info.enabled = cpu_to_le32(true); 272 output->info.r.width = cpu_to_le32(XRES_DEF); 273 output->info.r.height = cpu_to_le32(YRES_DEF); 274 } 275 276 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); 277 if (IS_ERR(primary)) 278 return PTR_ERR(primary); 279 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); 280 if (IS_ERR(cursor)) 281 return PTR_ERR(cursor); 282 drm_crtc_init_with_planes(dev, crtc, primary, cursor, 283 &virtio_gpu_crtc_funcs, NULL); 284 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 285 286 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 287 DRM_MODE_CONNECTOR_VIRTUAL); 288 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 289 290 drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, 291 DRM_MODE_ENCODER_VIRTUAL, NULL); 292 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 293 encoder->possible_crtcs = 1 << index; 294 295 drm_mode_connector_attach_encoder(connector, encoder); 296 drm_connector_register(connector); 297 return 0; 298 } 299 300 static struct drm_framebuffer * 301 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 302 struct drm_file *file_priv, 303 const struct drm_mode_fb_cmd2 *mode_cmd) 304 { 305 struct drm_gem_object *obj = NULL; 306 struct virtio_gpu_framebuffer *virtio_gpu_fb; 307 int ret; 308 309 /* lookup object associated with res handle */ 310 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); 311 if (!obj) 312 return ERR_PTR(-EINVAL); 313 314 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); 315 if (virtio_gpu_fb == NULL) 316 return ERR_PTR(-ENOMEM); 317 318 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); 319 if (ret) { 320 kfree(virtio_gpu_fb); 321 drm_gem_object_put_unlocked(obj); 322 return NULL; 323 } 324 325 return &virtio_gpu_fb->base; 326 } 327 328 static void vgdev_atomic_commit_tail(struct drm_atomic_state *state) 329 { 330 struct drm_device *dev = state->dev; 331 332 drm_atomic_helper_commit_modeset_disables(dev, state); 333 drm_atomic_helper_commit_modeset_enables(dev, state); 334 drm_atomic_helper_commit_planes(dev, state, 0); 335 336 drm_atomic_helper_commit_hw_done(state); 337 338 drm_atomic_helper_wait_for_vblanks(dev, state); 339 drm_atomic_helper_cleanup_planes(dev, state); 340 } 341 342 static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = { 343 .atomic_commit_tail = vgdev_atomic_commit_tail, 344 }; 345 346 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 347 .fb_create = virtio_gpu_user_framebuffer_create, 348 .atomic_check = drm_atomic_helper_check, 349 .atomic_commit = drm_atomic_helper_commit, 350 }; 351 352 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 353 { 354 int i; 355 356 drm_mode_config_init(vgdev->ddev); 357 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; 358 vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers; 359 360 /* modes will be validated against the framebuffer size */ 361 vgdev->ddev->mode_config.min_width = XRES_MIN; 362 vgdev->ddev->mode_config.min_height = YRES_MIN; 363 vgdev->ddev->mode_config.max_width = XRES_MAX; 364 vgdev->ddev->mode_config.max_height = YRES_MAX; 365 366 for (i = 0 ; i < vgdev->num_scanouts; ++i) 367 vgdev_output_init(vgdev, i); 368 369 drm_mode_config_reset(vgdev->ddev); 370 return 0; 371 } 372 373 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 374 { 375 virtio_gpu_fbdev_fini(vgdev); 376 drm_mode_config_cleanup(vgdev->ddev); 377 } 378