1 /* $NetBSD: vmwgfx_ldu.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $ */ 2 3 /************************************************************************** 4 * 5 * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA 6 * All Rights Reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the 10 * "Software"), to deal in the Software without restriction, including 11 * without limitation the rights to use, copy, modify, merge, publish, 12 * distribute, sub license, and/or sell copies of the Software, and to 13 * permit persons to whom the Software is furnished to do so, subject to 14 * the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the 17 * next paragraph) shall be included in all copies or substantial portions 18 * of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 26 * USE OR OTHER DEALINGS IN THE SOFTWARE. 27 * 28 **************************************************************************/ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_ldu.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $"); 32 33 #include "vmwgfx_kms.h" 34 #include <drm/drm_plane_helper.h> 35 36 37 #define vmw_crtc_to_ldu(x) \ 38 container_of(x, struct vmw_legacy_display_unit, base.crtc) 39 #define vmw_encoder_to_ldu(x) \ 40 container_of(x, struct vmw_legacy_display_unit, base.encoder) 41 #define vmw_connector_to_ldu(x) \ 42 container_of(x, struct vmw_legacy_display_unit, base.connector) 43 44 struct vmw_legacy_display { 45 struct list_head active; 46 47 unsigned num_active; 48 unsigned last_num_active; 49 50 struct vmw_framebuffer *fb; 51 }; 52 53 /** 54 * Display unit using the legacy register interface. 55 */ 56 struct vmw_legacy_display_unit { 57 struct vmw_display_unit base; 58 59 struct list_head active; 60 }; 61 62 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu) 63 { 64 list_del_init(&ldu->active); 65 vmw_du_cleanup(&ldu->base); 66 kfree(ldu); 67 } 68 69 70 /* 71 * Legacy Display Unit CRTC functions 72 */ 73 74 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc) 75 { 76 vmw_ldu_destroy(vmw_crtc_to_ldu(crtc)); 77 } 78 79 static int vmw_ldu_commit_list(struct vmw_private *dev_priv) 80 { 81 struct vmw_legacy_display *lds = dev_priv->ldu_priv; 82 struct vmw_legacy_display_unit *entry; 83 struct vmw_display_unit *du = NULL; 84 struct drm_framebuffer *fb = NULL; 85 struct drm_crtc *crtc = NULL; 86 int i = 0, ret; 87 88 /* If there is no display topology the host just assumes 89 * that the guest will set the same layout as the host. 90 */ 91 if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) { 92 int w = 0, h = 0; 93 list_for_each_entry(entry, &lds->active, active) { 94 crtc = &entry->base.crtc; 95 w = max(w, crtc->x + crtc->mode.hdisplay); 96 h = max(h, crtc->y + crtc->mode.vdisplay); 97 i++; 98 } 99 100 if (crtc == NULL) 101 return 0; 102 fb = entry->base.crtc.primary->fb; 103 104 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0], 105 fb->bits_per_pixel, fb->depth); 106 } 107 108 if (!list_empty(&lds->active)) { 109 entry = list_entry(lds->active.next, typeof(*entry), active); 110 fb = entry->base.crtc.primary->fb; 111 112 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0], 113 fb->bits_per_pixel, fb->depth); 114 } 115 116 /* Make sure we always show something. */ 117 vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 118 lds->num_active ? lds->num_active : 1); 119 120 i = 0; 121 list_for_each_entry(entry, &lds->active, active) { 122 crtc = &entry->base.crtc; 123 124 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i); 125 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i); 126 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x); 127 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y); 128 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay); 129 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay); 130 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID); 131 132 i++; 133 } 134 135 BUG_ON(i != lds->num_active); 136 137 lds->last_num_active = lds->num_active; 138 139 140 /* Find the first du with a cursor. */ 141 list_for_each_entry(entry, &lds->active, active) { 142 du = &entry->base; 143 144 if (!du->cursor_dmabuf) 145 continue; 146 147 ret = vmw_cursor_update_dmabuf(dev_priv, 148 du->cursor_dmabuf, 149 64, 64, 150 du->hotspot_x, 151 du->hotspot_y); 152 if (ret == 0) 153 break; 154 155 DRM_ERROR("Could not update cursor image\n"); 156 } 157 158 return 0; 159 } 160 161 static int vmw_ldu_del_active(struct vmw_private *vmw_priv, 162 struct vmw_legacy_display_unit *ldu) 163 { 164 struct vmw_legacy_display *ld = vmw_priv->ldu_priv; 165 if (list_empty(&ldu->active)) 166 return 0; 167 168 /* Must init otherwise list_empty(&ldu->active) will not work. */ 169 list_del_init(&ldu->active); 170 if (--(ld->num_active) == 0) { 171 BUG_ON(!ld->fb); 172 if (ld->fb->unpin) 173 ld->fb->unpin(ld->fb); 174 ld->fb = NULL; 175 } 176 177 return 0; 178 } 179 180 static int vmw_ldu_add_active(struct vmw_private *vmw_priv, 181 struct vmw_legacy_display_unit *ldu, 182 struct vmw_framebuffer *vfb) 183 { 184 struct vmw_legacy_display *ld = vmw_priv->ldu_priv; 185 struct vmw_legacy_display_unit *entry; 186 struct list_head *at; 187 188 BUG_ON(!ld->num_active && ld->fb); 189 if (vfb != ld->fb) { 190 if (ld->fb && ld->fb->unpin) 191 ld->fb->unpin(ld->fb); 192 if (vfb->pin) 193 vfb->pin(vfb); 194 ld->fb = vfb; 195 } 196 197 if (!list_empty(&ldu->active)) 198 return 0; 199 200 at = &ld->active; 201 list_for_each_entry(entry, &ld->active, active) { 202 if (entry->base.unit > ldu->base.unit) 203 break; 204 205 at = &entry->active; 206 } 207 208 list_add(&ldu->active, at); 209 210 ld->num_active++; 211 212 return 0; 213 } 214 215 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set) 216 { 217 struct vmw_private *dev_priv; 218 struct vmw_legacy_display_unit *ldu; 219 struct drm_connector *connector; 220 struct drm_display_mode *mode; 221 struct drm_encoder *encoder; 222 struct vmw_framebuffer *vfb; 223 struct drm_framebuffer *fb; 224 struct drm_crtc *crtc; 225 226 if (!set) 227 return -EINVAL; 228 229 if (!set->crtc) 230 return -EINVAL; 231 232 /* get the ldu */ 233 crtc = set->crtc; 234 ldu = vmw_crtc_to_ldu(crtc); 235 vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL; 236 dev_priv = vmw_priv(crtc->dev); 237 238 if (set->num_connectors > 1) { 239 DRM_ERROR("to many connectors\n"); 240 return -EINVAL; 241 } 242 243 if (set->num_connectors == 1 && 244 set->connectors[0] != &ldu->base.connector) { 245 DRM_ERROR("connector doesn't match %p %p\n", 246 set->connectors[0], &ldu->base.connector); 247 return -EINVAL; 248 } 249 250 /* ldu only supports one fb active at the time */ 251 if (dev_priv->ldu_priv->fb && vfb && 252 !(dev_priv->ldu_priv->num_active == 1 && 253 !list_empty(&ldu->active)) && 254 dev_priv->ldu_priv->fb != vfb) { 255 DRM_ERROR("Multiple framebuffers not supported\n"); 256 return -EINVAL; 257 } 258 259 /* since they always map one to one these are safe */ 260 connector = &ldu->base.connector; 261 encoder = &ldu->base.encoder; 262 263 /* should we turn the crtc off? */ 264 if (set->num_connectors == 0 || !set->mode || !set->fb) { 265 266 connector->encoder = NULL; 267 encoder->crtc = NULL; 268 crtc->primary->fb = NULL; 269 crtc->enabled = false; 270 271 vmw_ldu_del_active(dev_priv, ldu); 272 273 return vmw_ldu_commit_list(dev_priv); 274 } 275 276 277 /* we now know we want to set a mode */ 278 mode = set->mode; 279 fb = set->fb; 280 281 if (set->x + mode->hdisplay > fb->width || 282 set->y + mode->vdisplay > fb->height) { 283 DRM_ERROR("set outside of framebuffer\n"); 284 return -EINVAL; 285 } 286 287 vmw_svga_enable(dev_priv); 288 289 crtc->primary->fb = fb; 290 encoder->crtc = crtc; 291 connector->encoder = encoder; 292 crtc->x = set->x; 293 crtc->y = set->y; 294 crtc->mode = *mode; 295 crtc->enabled = true; 296 297 vmw_ldu_add_active(dev_priv, ldu, vfb); 298 299 return vmw_ldu_commit_list(dev_priv); 300 } 301 302 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = { 303 .save = vmw_du_crtc_save, 304 .restore = vmw_du_crtc_restore, 305 .cursor_set2 = vmw_du_crtc_cursor_set2, 306 .cursor_move = vmw_du_crtc_cursor_move, 307 .gamma_set = vmw_du_crtc_gamma_set, 308 .destroy = vmw_ldu_crtc_destroy, 309 .set_config = vmw_ldu_crtc_set_config, 310 }; 311 312 313 /* 314 * Legacy Display Unit encoder functions 315 */ 316 317 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder) 318 { 319 vmw_ldu_destroy(vmw_encoder_to_ldu(encoder)); 320 } 321 322 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = { 323 .destroy = vmw_ldu_encoder_destroy, 324 }; 325 326 /* 327 * Legacy Display Unit connector functions 328 */ 329 330 static void vmw_ldu_connector_destroy(struct drm_connector *connector) 331 { 332 vmw_ldu_destroy(vmw_connector_to_ldu(connector)); 333 } 334 335 static struct drm_connector_funcs vmw_legacy_connector_funcs = { 336 .dpms = vmw_du_connector_dpms, 337 .save = vmw_du_connector_save, 338 .restore = vmw_du_connector_restore, 339 .detect = vmw_du_connector_detect, 340 .fill_modes = vmw_du_connector_fill_modes, 341 .set_property = vmw_du_connector_set_property, 342 .destroy = vmw_ldu_connector_destroy, 343 }; 344 345 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit) 346 { 347 struct vmw_legacy_display_unit *ldu; 348 struct drm_device *dev = dev_priv->dev; 349 struct drm_connector *connector; 350 struct drm_encoder *encoder; 351 struct drm_crtc *crtc; 352 353 ldu = kzalloc(sizeof(*ldu), GFP_KERNEL); 354 if (!ldu) 355 return -ENOMEM; 356 357 ldu->base.unit = unit; 358 crtc = &ldu->base.crtc; 359 encoder = &ldu->base.encoder; 360 connector = &ldu->base.connector; 361 362 INIT_LIST_HEAD(&ldu->active); 363 364 ldu->base.pref_active = (unit == 0); 365 ldu->base.pref_width = dev_priv->initial_width; 366 ldu->base.pref_height = dev_priv->initial_height; 367 ldu->base.pref_mode = NULL; 368 ldu->base.is_implicit = true; 369 370 drm_connector_init(dev, connector, &vmw_legacy_connector_funcs, 371 DRM_MODE_CONNECTOR_VIRTUAL); 372 connector->status = vmw_du_connector_detect(connector, true); 373 374 drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs, 375 DRM_MODE_ENCODER_VIRTUAL); 376 drm_mode_connector_attach_encoder(connector, encoder); 377 encoder->possible_crtcs = (1 << unit); 378 encoder->possible_clones = 0; 379 380 (void) drm_connector_register(connector); 381 382 drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs); 383 384 drm_mode_crtc_set_gamma_size(crtc, 256); 385 386 drm_object_attach_property(&connector->base, 387 dev->mode_config.dirty_info_property, 388 1); 389 390 return 0; 391 } 392 393 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv) 394 { 395 struct drm_device *dev = dev_priv->dev; 396 int i, ret; 397 398 if (dev_priv->ldu_priv) { 399 DRM_INFO("ldu system already on\n"); 400 return -EINVAL; 401 } 402 403 dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL); 404 if (!dev_priv->ldu_priv) 405 return -ENOMEM; 406 407 INIT_LIST_HEAD(&dev_priv->ldu_priv->active); 408 dev_priv->ldu_priv->num_active = 0; 409 dev_priv->ldu_priv->last_num_active = 0; 410 dev_priv->ldu_priv->fb = NULL; 411 412 /* for old hardware without multimon only enable one display */ 413 if (dev_priv->capabilities & SVGA_CAP_MULTIMON) 414 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS); 415 else 416 ret = drm_vblank_init(dev, 1); 417 if (ret != 0) 418 goto err_free; 419 420 ret = drm_mode_create_dirty_info_property(dev); 421 if (ret != 0) 422 goto err_vblank_cleanup; 423 424 if (dev_priv->capabilities & SVGA_CAP_MULTIMON) 425 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) 426 vmw_ldu_init(dev_priv, i); 427 else 428 vmw_ldu_init(dev_priv, 0); 429 430 dev_priv->active_display_unit = vmw_du_legacy; 431 432 DRM_INFO("Legacy Display Unit initialized\n"); 433 434 return 0; 435 436 err_vblank_cleanup: 437 drm_vblank_cleanup(dev); 438 err_free: 439 kfree(dev_priv->ldu_priv); 440 dev_priv->ldu_priv = NULL; 441 return ret; 442 } 443 444 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv) 445 { 446 struct drm_device *dev = dev_priv->dev; 447 448 if (!dev_priv->ldu_priv) 449 return -ENOSYS; 450 451 drm_vblank_cleanup(dev); 452 453 BUG_ON(!list_empty(&dev_priv->ldu_priv->active)); 454 455 kfree(dev_priv->ldu_priv); 456 457 return 0; 458 } 459 460 461 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv, 462 struct vmw_framebuffer *framebuffer, 463 unsigned flags, unsigned color, 464 struct drm_clip_rect *clips, 465 unsigned num_clips, int increment) 466 { 467 size_t fifo_size; 468 int i; 469 470 struct { 471 uint32_t header; 472 SVGAFifoCmdUpdate body; 473 } *cmd; 474 475 fifo_size = sizeof(*cmd) * num_clips; 476 cmd = vmw_fifo_reserve(dev_priv, fifo_size); 477 if (unlikely(cmd == NULL)) { 478 DRM_ERROR("Fifo reserve failed.\n"); 479 return -ENOMEM; 480 } 481 482 memset(cmd, 0, fifo_size); 483 for (i = 0; i < num_clips; i++, clips += increment) { 484 cmd[i].header = SVGA_CMD_UPDATE; 485 cmd[i].body.x = clips->x1; 486 cmd[i].body.y = clips->y1; 487 cmd[i].body.width = clips->x2 - clips->x1; 488 cmd[i].body.height = clips->y2 - clips->y1; 489 } 490 491 vmw_fifo_commit(dev_priv, fifo_size); 492 return 0; 493 } 494