1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Avionic Design GmbH 4 * Copyright (C) 2012-2016 NVIDIA CORPORATION. All rights reserved. 5 */ 6 7 #include <linux/bitops.h> 8 #include <linux/host1x.h> 9 #include <linux/idr.h> 10 #include <linux/iommu.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 14 #include <drm/drm_atomic.h> 15 #include <drm/drm_atomic_helper.h> 16 #include <drm/drm_debugfs.h> 17 #include <drm/drm_drv.h> 18 #include <drm/drm_fourcc.h> 19 #include <drm/drm_ioctl.h> 20 #include <drm/drm_prime.h> 21 #include <drm/drm_vblank.h> 22 23 #include "drm.h" 24 #include "gem.h" 25 26 #define DRIVER_NAME "tegra" 27 #define DRIVER_DESC "NVIDIA Tegra graphics" 28 #define DRIVER_DATE "20120330" 29 #define DRIVER_MAJOR 0 30 #define DRIVER_MINOR 0 31 #define DRIVER_PATCHLEVEL 0 32 33 #define CARVEOUT_SZ SZ_64M 34 #define CDMA_GATHER_FETCHES_MAX_NB 16383 35 36 struct tegra_drm_file { 37 struct idr contexts; 38 struct mutex lock; 39 }; 40 41 static int tegra_atomic_check(struct drm_device *drm, 42 struct drm_atomic_state *state) 43 { 44 int err; 45 46 err = drm_atomic_helper_check(drm, state); 47 if (err < 0) 48 return err; 49 50 return tegra_display_hub_atomic_check(drm, state); 51 } 52 53 static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = { 54 .fb_create = tegra_fb_create, 55 #ifdef CONFIG_DRM_FBDEV_EMULATION 56 .output_poll_changed = drm_fb_helper_output_poll_changed, 57 #endif 58 .atomic_check = tegra_atomic_check, 59 .atomic_commit = drm_atomic_helper_commit, 60 }; 61 62 static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state) 63 { 64 struct drm_device *drm = old_state->dev; 65 struct tegra_drm *tegra = drm->dev_private; 66 67 if (tegra->hub) { 68 drm_atomic_helper_commit_modeset_disables(drm, old_state); 69 tegra_display_hub_atomic_commit(drm, old_state); 70 drm_atomic_helper_commit_planes(drm, old_state, 0); 71 drm_atomic_helper_commit_modeset_enables(drm, old_state); 72 drm_atomic_helper_commit_hw_done(old_state); 73 drm_atomic_helper_wait_for_vblanks(drm, old_state); 74 drm_atomic_helper_cleanup_planes(drm, old_state); 75 } else { 76 drm_atomic_helper_commit_tail_rpm(old_state); 77 } 78 } 79 80 static const struct drm_mode_config_helper_funcs 81 tegra_drm_mode_config_helpers = { 82 .atomic_commit_tail = tegra_atomic_commit_tail, 83 }; 84 85 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp) 86 { 87 struct tegra_drm_file *fpriv; 88 89 fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL); 90 if (!fpriv) 91 return -ENOMEM; 92 93 idr_init(&fpriv->contexts); 94 mutex_init(&fpriv->lock); 95 filp->driver_priv = fpriv; 96 97 return 0; 98 } 99 100 static void tegra_drm_context_free(struct tegra_drm_context *context) 101 { 102 context->client->ops->close_channel(context); 103 kfree(context); 104 } 105 106 static struct host1x_bo * 107 host1x_bo_lookup(struct drm_file *file, u32 handle) 108 { 109 struct drm_gem_object *gem; 110 struct tegra_bo *bo; 111 112 gem = drm_gem_object_lookup(file, handle); 113 if (!gem) 114 return NULL; 115 116 bo = to_tegra_bo(gem); 117 return &bo->base; 118 } 119 120 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest, 121 struct drm_tegra_reloc __user *src, 122 struct drm_device *drm, 123 struct drm_file *file) 124 { 125 u32 cmdbuf, target; 126 int err; 127 128 err = get_user(cmdbuf, &src->cmdbuf.handle); 129 if (err < 0) 130 return err; 131 132 err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset); 133 if (err < 0) 134 return err; 135 136 err = get_user(target, &src->target.handle); 137 if (err < 0) 138 return err; 139 140 err = get_user(dest->target.offset, &src->target.offset); 141 if (err < 0) 142 return err; 143 144 err = get_user(dest->shift, &src->shift); 145 if (err < 0) 146 return err; 147 148 dest->flags = HOST1X_RELOC_READ | HOST1X_RELOC_WRITE; 149 150 dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf); 151 if (!dest->cmdbuf.bo) 152 return -ENOENT; 153 154 dest->target.bo = host1x_bo_lookup(file, target); 155 if (!dest->target.bo) 156 return -ENOENT; 157 158 return 0; 159 } 160 161 int tegra_drm_submit(struct tegra_drm_context *context, 162 struct drm_tegra_submit *args, struct drm_device *drm, 163 struct drm_file *file) 164 { 165 struct host1x_client *client = &context->client->base; 166 unsigned int num_cmdbufs = args->num_cmdbufs; 167 unsigned int num_relocs = args->num_relocs; 168 struct drm_tegra_cmdbuf __user *user_cmdbufs; 169 struct drm_tegra_reloc __user *user_relocs; 170 struct drm_tegra_syncpt __user *user_syncpt; 171 struct drm_tegra_syncpt syncpt; 172 struct host1x *host1x = dev_get_drvdata(drm->dev->parent); 173 struct drm_gem_object **refs; 174 struct host1x_syncpt *sp; 175 struct host1x_job *job; 176 unsigned int num_refs; 177 int err; 178 179 user_cmdbufs = u64_to_user_ptr(args->cmdbufs); 180 user_relocs = u64_to_user_ptr(args->relocs); 181 user_syncpt = u64_to_user_ptr(args->syncpts); 182 183 /* We don't yet support other than one syncpt_incr struct per submit */ 184 if (args->num_syncpts != 1) 185 return -EINVAL; 186 187 /* We don't yet support waitchks */ 188 if (args->num_waitchks != 0) 189 return -EINVAL; 190 191 job = host1x_job_alloc(context->channel, args->num_cmdbufs, 192 args->num_relocs); 193 if (!job) 194 return -ENOMEM; 195 196 job->num_relocs = args->num_relocs; 197 job->client = client; 198 job->class = client->class; 199 job->serialize = true; 200 201 /* 202 * Track referenced BOs so that they can be unreferenced after the 203 * submission is complete. 204 */ 205 num_refs = num_cmdbufs + num_relocs * 2; 206 207 refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL); 208 if (!refs) { 209 err = -ENOMEM; 210 goto put; 211 } 212 213 /* reuse as an iterator later */ 214 num_refs = 0; 215 216 while (num_cmdbufs) { 217 struct drm_tegra_cmdbuf cmdbuf; 218 struct host1x_bo *bo; 219 struct tegra_bo *obj; 220 u64 offset; 221 222 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) { 223 err = -EFAULT; 224 goto fail; 225 } 226 227 /* 228 * The maximum number of CDMA gather fetches is 16383, a higher 229 * value means the words count is malformed. 230 */ 231 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) { 232 err = -EINVAL; 233 goto fail; 234 } 235 236 bo = host1x_bo_lookup(file, cmdbuf.handle); 237 if (!bo) { 238 err = -ENOENT; 239 goto fail; 240 } 241 242 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32); 243 obj = host1x_to_tegra_bo(bo); 244 refs[num_refs++] = &obj->gem; 245 246 /* 247 * Gather buffer base address must be 4-bytes aligned, 248 * unaligned offset is malformed and cause commands stream 249 * corruption on the buffer address relocation. 250 */ 251 if (offset & 3 || offset > obj->gem.size) { 252 err = -EINVAL; 253 goto fail; 254 } 255 256 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset); 257 num_cmdbufs--; 258 user_cmdbufs++; 259 } 260 261 /* copy and resolve relocations from submit */ 262 while (num_relocs--) { 263 struct host1x_reloc *reloc; 264 struct tegra_bo *obj; 265 266 err = host1x_reloc_copy_from_user(&job->relocs[num_relocs], 267 &user_relocs[num_relocs], drm, 268 file); 269 if (err < 0) 270 goto fail; 271 272 reloc = &job->relocs[num_relocs]; 273 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo); 274 refs[num_refs++] = &obj->gem; 275 276 /* 277 * The unaligned cmdbuf offset will cause an unaligned write 278 * during of the relocations patching, corrupting the commands 279 * stream. 280 */ 281 if (reloc->cmdbuf.offset & 3 || 282 reloc->cmdbuf.offset >= obj->gem.size) { 283 err = -EINVAL; 284 goto fail; 285 } 286 287 obj = host1x_to_tegra_bo(reloc->target.bo); 288 refs[num_refs++] = &obj->gem; 289 290 if (reloc->target.offset >= obj->gem.size) { 291 err = -EINVAL; 292 goto fail; 293 } 294 } 295 296 if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) { 297 err = -EFAULT; 298 goto fail; 299 } 300 301 /* check whether syncpoint ID is valid */ 302 sp = host1x_syncpt_get(host1x, syncpt.id); 303 if (!sp) { 304 err = -ENOENT; 305 goto fail; 306 } 307 308 job->is_addr_reg = context->client->ops->is_addr_reg; 309 job->is_valid_class = context->client->ops->is_valid_class; 310 job->syncpt_incrs = syncpt.incrs; 311 job->syncpt_id = syncpt.id; 312 job->timeout = 10000; 313 314 if (args->timeout && args->timeout < 10000) 315 job->timeout = args->timeout; 316 317 err = host1x_job_pin(job, context->client->base.dev); 318 if (err) 319 goto fail; 320 321 err = host1x_job_submit(job); 322 if (err) { 323 host1x_job_unpin(job); 324 goto fail; 325 } 326 327 args->fence = job->syncpt_end; 328 329 fail: 330 while (num_refs--) 331 drm_gem_object_put_unlocked(refs[num_refs]); 332 333 kfree(refs); 334 335 put: 336 host1x_job_put(job); 337 return err; 338 } 339 340 341 #ifdef CONFIG_DRM_TEGRA_STAGING 342 static int tegra_gem_create(struct drm_device *drm, void *data, 343 struct drm_file *file) 344 { 345 struct drm_tegra_gem_create *args = data; 346 struct tegra_bo *bo; 347 348 bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags, 349 &args->handle); 350 if (IS_ERR(bo)) 351 return PTR_ERR(bo); 352 353 return 0; 354 } 355 356 static int tegra_gem_mmap(struct drm_device *drm, void *data, 357 struct drm_file *file) 358 { 359 struct drm_tegra_gem_mmap *args = data; 360 struct drm_gem_object *gem; 361 struct tegra_bo *bo; 362 363 gem = drm_gem_object_lookup(file, args->handle); 364 if (!gem) 365 return -EINVAL; 366 367 bo = to_tegra_bo(gem); 368 369 args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node); 370 371 drm_gem_object_put_unlocked(gem); 372 373 return 0; 374 } 375 376 static int tegra_syncpt_read(struct drm_device *drm, void *data, 377 struct drm_file *file) 378 { 379 struct host1x *host = dev_get_drvdata(drm->dev->parent); 380 struct drm_tegra_syncpt_read *args = data; 381 struct host1x_syncpt *sp; 382 383 sp = host1x_syncpt_get(host, args->id); 384 if (!sp) 385 return -EINVAL; 386 387 args->value = host1x_syncpt_read_min(sp); 388 return 0; 389 } 390 391 static int tegra_syncpt_incr(struct drm_device *drm, void *data, 392 struct drm_file *file) 393 { 394 struct host1x *host1x = dev_get_drvdata(drm->dev->parent); 395 struct drm_tegra_syncpt_incr *args = data; 396 struct host1x_syncpt *sp; 397 398 sp = host1x_syncpt_get(host1x, args->id); 399 if (!sp) 400 return -EINVAL; 401 402 return host1x_syncpt_incr(sp); 403 } 404 405 static int tegra_syncpt_wait(struct drm_device *drm, void *data, 406 struct drm_file *file) 407 { 408 struct host1x *host1x = dev_get_drvdata(drm->dev->parent); 409 struct drm_tegra_syncpt_wait *args = data; 410 struct host1x_syncpt *sp; 411 412 sp = host1x_syncpt_get(host1x, args->id); 413 if (!sp) 414 return -EINVAL; 415 416 return host1x_syncpt_wait(sp, args->thresh, 417 msecs_to_jiffies(args->timeout), 418 &args->value); 419 } 420 421 static int tegra_client_open(struct tegra_drm_file *fpriv, 422 struct tegra_drm_client *client, 423 struct tegra_drm_context *context) 424 { 425 int err; 426 427 err = client->ops->open_channel(client, context); 428 if (err < 0) 429 return err; 430 431 err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL); 432 if (err < 0) { 433 client->ops->close_channel(context); 434 return err; 435 } 436 437 context->client = client; 438 context->id = err; 439 440 return 0; 441 } 442 443 static int tegra_open_channel(struct drm_device *drm, void *data, 444 struct drm_file *file) 445 { 446 struct tegra_drm_file *fpriv = file->driver_priv; 447 struct tegra_drm *tegra = drm->dev_private; 448 struct drm_tegra_open_channel *args = data; 449 struct tegra_drm_context *context; 450 struct tegra_drm_client *client; 451 int err = -ENODEV; 452 453 context = kzalloc(sizeof(*context), GFP_KERNEL); 454 if (!context) 455 return -ENOMEM; 456 457 mutex_lock(&fpriv->lock); 458 459 list_for_each_entry(client, &tegra->clients, list) 460 if (client->base.class == args->client) { 461 err = tegra_client_open(fpriv, client, context); 462 if (err < 0) 463 break; 464 465 args->context = context->id; 466 break; 467 } 468 469 if (err < 0) 470 kfree(context); 471 472 mutex_unlock(&fpriv->lock); 473 return err; 474 } 475 476 static int tegra_close_channel(struct drm_device *drm, void *data, 477 struct drm_file *file) 478 { 479 struct tegra_drm_file *fpriv = file->driver_priv; 480 struct drm_tegra_close_channel *args = data; 481 struct tegra_drm_context *context; 482 int err = 0; 483 484 mutex_lock(&fpriv->lock); 485 486 context = idr_find(&fpriv->contexts, args->context); 487 if (!context) { 488 err = -EINVAL; 489 goto unlock; 490 } 491 492 idr_remove(&fpriv->contexts, context->id); 493 tegra_drm_context_free(context); 494 495 unlock: 496 mutex_unlock(&fpriv->lock); 497 return err; 498 } 499 500 static int tegra_get_syncpt(struct drm_device *drm, void *data, 501 struct drm_file *file) 502 { 503 struct tegra_drm_file *fpriv = file->driver_priv; 504 struct drm_tegra_get_syncpt *args = data; 505 struct tegra_drm_context *context; 506 struct host1x_syncpt *syncpt; 507 int err = 0; 508 509 mutex_lock(&fpriv->lock); 510 511 context = idr_find(&fpriv->contexts, args->context); 512 if (!context) { 513 err = -ENODEV; 514 goto unlock; 515 } 516 517 if (args->index >= context->client->base.num_syncpts) { 518 err = -EINVAL; 519 goto unlock; 520 } 521 522 syncpt = context->client->base.syncpts[args->index]; 523 args->id = host1x_syncpt_id(syncpt); 524 525 unlock: 526 mutex_unlock(&fpriv->lock); 527 return err; 528 } 529 530 static int tegra_submit(struct drm_device *drm, void *data, 531 struct drm_file *file) 532 { 533 struct tegra_drm_file *fpriv = file->driver_priv; 534 struct drm_tegra_submit *args = data; 535 struct tegra_drm_context *context; 536 int err; 537 538 mutex_lock(&fpriv->lock); 539 540 context = idr_find(&fpriv->contexts, args->context); 541 if (!context) { 542 err = -ENODEV; 543 goto unlock; 544 } 545 546 err = context->client->ops->submit(context, args, drm, file); 547 548 unlock: 549 mutex_unlock(&fpriv->lock); 550 return err; 551 } 552 553 static int tegra_get_syncpt_base(struct drm_device *drm, void *data, 554 struct drm_file *file) 555 { 556 struct tegra_drm_file *fpriv = file->driver_priv; 557 struct drm_tegra_get_syncpt_base *args = data; 558 struct tegra_drm_context *context; 559 struct host1x_syncpt_base *base; 560 struct host1x_syncpt *syncpt; 561 int err = 0; 562 563 mutex_lock(&fpriv->lock); 564 565 context = idr_find(&fpriv->contexts, args->context); 566 if (!context) { 567 err = -ENODEV; 568 goto unlock; 569 } 570 571 if (args->syncpt >= context->client->base.num_syncpts) { 572 err = -EINVAL; 573 goto unlock; 574 } 575 576 syncpt = context->client->base.syncpts[args->syncpt]; 577 578 base = host1x_syncpt_get_base(syncpt); 579 if (!base) { 580 err = -ENXIO; 581 goto unlock; 582 } 583 584 args->id = host1x_syncpt_base_id(base); 585 586 unlock: 587 mutex_unlock(&fpriv->lock); 588 return err; 589 } 590 591 static int tegra_gem_set_tiling(struct drm_device *drm, void *data, 592 struct drm_file *file) 593 { 594 struct drm_tegra_gem_set_tiling *args = data; 595 enum tegra_bo_tiling_mode mode; 596 struct drm_gem_object *gem; 597 unsigned long value = 0; 598 struct tegra_bo *bo; 599 600 switch (args->mode) { 601 case DRM_TEGRA_GEM_TILING_MODE_PITCH: 602 mode = TEGRA_BO_TILING_MODE_PITCH; 603 604 if (args->value != 0) 605 return -EINVAL; 606 607 break; 608 609 case DRM_TEGRA_GEM_TILING_MODE_TILED: 610 mode = TEGRA_BO_TILING_MODE_TILED; 611 612 if (args->value != 0) 613 return -EINVAL; 614 615 break; 616 617 case DRM_TEGRA_GEM_TILING_MODE_BLOCK: 618 mode = TEGRA_BO_TILING_MODE_BLOCK; 619 620 if (args->value > 5) 621 return -EINVAL; 622 623 value = args->value; 624 break; 625 626 default: 627 return -EINVAL; 628 } 629 630 gem = drm_gem_object_lookup(file, args->handle); 631 if (!gem) 632 return -ENOENT; 633 634 bo = to_tegra_bo(gem); 635 636 bo->tiling.mode = mode; 637 bo->tiling.value = value; 638 639 drm_gem_object_put_unlocked(gem); 640 641 return 0; 642 } 643 644 static int tegra_gem_get_tiling(struct drm_device *drm, void *data, 645 struct drm_file *file) 646 { 647 struct drm_tegra_gem_get_tiling *args = data; 648 struct drm_gem_object *gem; 649 struct tegra_bo *bo; 650 int err = 0; 651 652 gem = drm_gem_object_lookup(file, args->handle); 653 if (!gem) 654 return -ENOENT; 655 656 bo = to_tegra_bo(gem); 657 658 switch (bo->tiling.mode) { 659 case TEGRA_BO_TILING_MODE_PITCH: 660 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH; 661 args->value = 0; 662 break; 663 664 case TEGRA_BO_TILING_MODE_TILED: 665 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED; 666 args->value = 0; 667 break; 668 669 case TEGRA_BO_TILING_MODE_BLOCK: 670 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK; 671 args->value = bo->tiling.value; 672 break; 673 674 default: 675 err = -EINVAL; 676 break; 677 } 678 679 drm_gem_object_put_unlocked(gem); 680 681 return err; 682 } 683 684 static int tegra_gem_set_flags(struct drm_device *drm, void *data, 685 struct drm_file *file) 686 { 687 struct drm_tegra_gem_set_flags *args = data; 688 struct drm_gem_object *gem; 689 struct tegra_bo *bo; 690 691 if (args->flags & ~DRM_TEGRA_GEM_FLAGS) 692 return -EINVAL; 693 694 gem = drm_gem_object_lookup(file, args->handle); 695 if (!gem) 696 return -ENOENT; 697 698 bo = to_tegra_bo(gem); 699 bo->flags = 0; 700 701 if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP) 702 bo->flags |= TEGRA_BO_BOTTOM_UP; 703 704 drm_gem_object_put_unlocked(gem); 705 706 return 0; 707 } 708 709 static int tegra_gem_get_flags(struct drm_device *drm, void *data, 710 struct drm_file *file) 711 { 712 struct drm_tegra_gem_get_flags *args = data; 713 struct drm_gem_object *gem; 714 struct tegra_bo *bo; 715 716 gem = drm_gem_object_lookup(file, args->handle); 717 if (!gem) 718 return -ENOENT; 719 720 bo = to_tegra_bo(gem); 721 args->flags = 0; 722 723 if (bo->flags & TEGRA_BO_BOTTOM_UP) 724 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP; 725 726 drm_gem_object_put_unlocked(gem); 727 728 return 0; 729 } 730 #endif 731 732 static const struct drm_ioctl_desc tegra_drm_ioctls[] = { 733 #ifdef CONFIG_DRM_TEGRA_STAGING 734 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 735 DRM_RENDER_ALLOW), 736 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 737 DRM_RENDER_ALLOW), 738 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 739 DRM_RENDER_ALLOW), 740 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 741 DRM_RENDER_ALLOW), 742 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 743 DRM_RENDER_ALLOW), 744 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 745 DRM_RENDER_ALLOW), 746 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 747 DRM_RENDER_ALLOW), 748 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 749 DRM_RENDER_ALLOW), 750 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 751 DRM_RENDER_ALLOW), 752 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 753 DRM_RENDER_ALLOW), 754 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 755 DRM_RENDER_ALLOW), 756 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 757 DRM_RENDER_ALLOW), 758 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 759 DRM_RENDER_ALLOW), 760 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 761 DRM_RENDER_ALLOW), 762 #endif 763 }; 764 765 static const struct file_operations tegra_drm_fops = { 766 .owner = THIS_MODULE, 767 .open = drm_open, 768 .release = drm_release, 769 .unlocked_ioctl = drm_ioctl, 770 .mmap = tegra_drm_mmap, 771 .poll = drm_poll, 772 .read = drm_read, 773 .compat_ioctl = drm_compat_ioctl, 774 .llseek = noop_llseek, 775 }; 776 777 static int tegra_drm_context_cleanup(int id, void *p, void *data) 778 { 779 struct tegra_drm_context *context = p; 780 781 tegra_drm_context_free(context); 782 783 return 0; 784 } 785 786 static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file) 787 { 788 struct tegra_drm_file *fpriv = file->driver_priv; 789 790 mutex_lock(&fpriv->lock); 791 idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL); 792 mutex_unlock(&fpriv->lock); 793 794 idr_destroy(&fpriv->contexts); 795 mutex_destroy(&fpriv->lock); 796 kfree(fpriv); 797 } 798 799 #ifdef CONFIG_DEBUG_FS 800 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data) 801 { 802 struct drm_info_node *node = (struct drm_info_node *)s->private; 803 struct drm_device *drm = node->minor->dev; 804 struct drm_framebuffer *fb; 805 806 mutex_lock(&drm->mode_config.fb_lock); 807 808 list_for_each_entry(fb, &drm->mode_config.fb_list, head) { 809 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n", 810 fb->base.id, fb->width, fb->height, 811 fb->format->depth, 812 fb->format->cpp[0] * 8, 813 drm_framebuffer_read_refcount(fb)); 814 } 815 816 mutex_unlock(&drm->mode_config.fb_lock); 817 818 return 0; 819 } 820 821 static int tegra_debugfs_iova(struct seq_file *s, void *data) 822 { 823 struct drm_info_node *node = (struct drm_info_node *)s->private; 824 struct drm_device *drm = node->minor->dev; 825 struct tegra_drm *tegra = drm->dev_private; 826 struct drm_printer p = drm_seq_file_printer(s); 827 828 if (tegra->domain) { 829 mutex_lock(&tegra->mm_lock); 830 drm_mm_print(&tegra->mm, &p); 831 mutex_unlock(&tegra->mm_lock); 832 } 833 834 return 0; 835 } 836 837 static struct drm_info_list tegra_debugfs_list[] = { 838 { "framebuffers", tegra_debugfs_framebuffers, 0 }, 839 { "iova", tegra_debugfs_iova, 0 }, 840 }; 841 842 static void tegra_debugfs_init(struct drm_minor *minor) 843 { 844 drm_debugfs_create_files(tegra_debugfs_list, 845 ARRAY_SIZE(tegra_debugfs_list), 846 minor->debugfs_root, minor); 847 } 848 #endif 849 850 static struct drm_driver tegra_drm_driver = { 851 .driver_features = DRIVER_MODESET | DRIVER_GEM | 852 DRIVER_ATOMIC | DRIVER_RENDER, 853 .open = tegra_drm_open, 854 .postclose = tegra_drm_postclose, 855 .lastclose = drm_fb_helper_lastclose, 856 857 #if defined(CONFIG_DEBUG_FS) 858 .debugfs_init = tegra_debugfs_init, 859 #endif 860 861 .gem_free_object_unlocked = tegra_bo_free_object, 862 .gem_vm_ops = &tegra_bo_vm_ops, 863 864 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 865 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 866 .gem_prime_export = tegra_gem_prime_export, 867 .gem_prime_import = tegra_gem_prime_import, 868 869 .dumb_create = tegra_bo_dumb_create, 870 871 .ioctls = tegra_drm_ioctls, 872 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls), 873 .fops = &tegra_drm_fops, 874 875 .name = DRIVER_NAME, 876 .desc = DRIVER_DESC, 877 .date = DRIVER_DATE, 878 .major = DRIVER_MAJOR, 879 .minor = DRIVER_MINOR, 880 .patchlevel = DRIVER_PATCHLEVEL, 881 }; 882 883 int tegra_drm_register_client(struct tegra_drm *tegra, 884 struct tegra_drm_client *client) 885 { 886 mutex_lock(&tegra->clients_lock); 887 list_add_tail(&client->list, &tegra->clients); 888 client->drm = tegra; 889 mutex_unlock(&tegra->clients_lock); 890 891 return 0; 892 } 893 894 int tegra_drm_unregister_client(struct tegra_drm *tegra, 895 struct tegra_drm_client *client) 896 { 897 mutex_lock(&tegra->clients_lock); 898 list_del_init(&client->list); 899 client->drm = NULL; 900 mutex_unlock(&tegra->clients_lock); 901 902 return 0; 903 } 904 905 int host1x_client_iommu_attach(struct host1x_client *client) 906 { 907 struct iommu_domain *domain = iommu_get_domain_for_dev(client->dev); 908 struct drm_device *drm = dev_get_drvdata(client->host); 909 struct tegra_drm *tegra = drm->dev_private; 910 struct iommu_group *group = NULL; 911 int err; 912 913 /* 914 * If the host1x client is already attached to an IOMMU domain that is 915 * not the shared IOMMU domain, don't try to attach it to a different 916 * domain. This allows using the IOMMU-backed DMA API. 917 */ 918 if (domain && domain != tegra->domain) 919 return 0; 920 921 if (tegra->domain) { 922 group = iommu_group_get(client->dev); 923 if (!group) 924 return -ENODEV; 925 926 if (domain != tegra->domain) { 927 err = iommu_attach_group(tegra->domain, group); 928 if (err < 0) { 929 iommu_group_put(group); 930 return err; 931 } 932 } 933 934 tegra->use_explicit_iommu = true; 935 } 936 937 client->group = group; 938 939 return 0; 940 } 941 942 void host1x_client_iommu_detach(struct host1x_client *client) 943 { 944 struct drm_device *drm = dev_get_drvdata(client->host); 945 struct tegra_drm *tegra = drm->dev_private; 946 struct iommu_domain *domain; 947 948 if (client->group) { 949 /* 950 * Devices that are part of the same group may no longer be 951 * attached to a domain at this point because their group may 952 * have been detached by an earlier client. 953 */ 954 domain = iommu_get_domain_for_dev(client->dev); 955 if (domain) 956 iommu_detach_group(tegra->domain, client->group); 957 958 iommu_group_put(client->group); 959 client->group = NULL; 960 } 961 } 962 963 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma) 964 { 965 struct iova *alloc; 966 void *virt; 967 gfp_t gfp; 968 int err; 969 970 if (tegra->domain) 971 size = iova_align(&tegra->carveout.domain, size); 972 else 973 size = PAGE_ALIGN(size); 974 975 gfp = GFP_KERNEL | __GFP_ZERO; 976 if (!tegra->domain) { 977 /* 978 * Many units only support 32-bit addresses, even on 64-bit 979 * SoCs. If there is no IOMMU to translate into a 32-bit IO 980 * virtual address space, force allocations to be in the 981 * lower 32-bit range. 982 */ 983 gfp |= GFP_DMA; 984 } 985 986 virt = (void *)__get_free_pages(gfp, get_order(size)); 987 if (!virt) 988 return ERR_PTR(-ENOMEM); 989 990 if (!tegra->domain) { 991 /* 992 * If IOMMU is disabled, devices address physical memory 993 * directly. 994 */ 995 *dma = virt_to_phys(virt); 996 return virt; 997 } 998 999 alloc = alloc_iova(&tegra->carveout.domain, 1000 size >> tegra->carveout.shift, 1001 tegra->carveout.limit, true); 1002 if (!alloc) { 1003 err = -EBUSY; 1004 goto free_pages; 1005 } 1006 1007 *dma = iova_dma_addr(&tegra->carveout.domain, alloc); 1008 err = iommu_map(tegra->domain, *dma, virt_to_phys(virt), 1009 size, IOMMU_READ | IOMMU_WRITE); 1010 if (err < 0) 1011 goto free_iova; 1012 1013 return virt; 1014 1015 free_iova: 1016 __free_iova(&tegra->carveout.domain, alloc); 1017 free_pages: 1018 free_pages((unsigned long)virt, get_order(size)); 1019 1020 return ERR_PTR(err); 1021 } 1022 1023 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt, 1024 dma_addr_t dma) 1025 { 1026 if (tegra->domain) 1027 size = iova_align(&tegra->carveout.domain, size); 1028 else 1029 size = PAGE_ALIGN(size); 1030 1031 if (tegra->domain) { 1032 iommu_unmap(tegra->domain, dma, size); 1033 free_iova(&tegra->carveout.domain, 1034 iova_pfn(&tegra->carveout.domain, dma)); 1035 } 1036 1037 free_pages((unsigned long)virt, get_order(size)); 1038 } 1039 1040 static bool host1x_drm_wants_iommu(struct host1x_device *dev) 1041 { 1042 struct host1x *host1x = dev_get_drvdata(dev->dev.parent); 1043 struct iommu_domain *domain; 1044 1045 /* 1046 * If the Tegra DRM clients are backed by an IOMMU, push buffers are 1047 * likely to be allocated beyond the 32-bit boundary if sufficient 1048 * system memory is available. This is problematic on earlier Tegra 1049 * generations where host1x supports a maximum of 32 address bits in 1050 * the GATHER opcode. In this case, unless host1x is behind an IOMMU 1051 * as well it won't be able to process buffers allocated beyond the 1052 * 32-bit boundary. 1053 * 1054 * The DMA API will use bounce buffers in this case, so that could 1055 * perhaps still be made to work, even if less efficient, but there 1056 * is another catch: in order to perform cache maintenance on pages 1057 * allocated for discontiguous buffers we need to map and unmap the 1058 * SG table representing these buffers. This is fine for something 1059 * small like a push buffer, but it exhausts the bounce buffer pool 1060 * (typically on the order of a few MiB) for framebuffers (many MiB 1061 * for any modern resolution). 1062 * 1063 * Work around this by making sure that Tegra DRM clients only use 1064 * an IOMMU if the parent host1x also uses an IOMMU. 1065 * 1066 * Note that there's still a small gap here that we don't cover: if 1067 * the DMA API is backed by an IOMMU there's no way to control which 1068 * device is attached to an IOMMU and which isn't, except via wiring 1069 * up the device tree appropriately. This is considered an problem 1070 * of integration, so care must be taken for the DT to be consistent. 1071 */ 1072 domain = iommu_get_domain_for_dev(dev->dev.parent); 1073 1074 /* 1075 * Tegra20 and Tegra30 don't support addressing memory beyond the 1076 * 32-bit boundary, so the regular GATHER opcodes will always be 1077 * sufficient and whether or not the host1x is attached to an IOMMU 1078 * doesn't matter. 1079 */ 1080 if (!domain && host1x_get_dma_mask(host1x) <= DMA_BIT_MASK(32)) 1081 return true; 1082 1083 return domain != NULL; 1084 } 1085 1086 static int host1x_drm_probe(struct host1x_device *dev) 1087 { 1088 struct drm_driver *driver = &tegra_drm_driver; 1089 struct tegra_drm *tegra; 1090 struct drm_device *drm; 1091 int err; 1092 1093 drm = drm_dev_alloc(driver, &dev->dev); 1094 if (IS_ERR(drm)) 1095 return PTR_ERR(drm); 1096 1097 tegra = kzalloc(sizeof(*tegra), GFP_KERNEL); 1098 if (!tegra) { 1099 err = -ENOMEM; 1100 goto put; 1101 } 1102 1103 if (host1x_drm_wants_iommu(dev) && iommu_present(&platform_bus_type)) { 1104 tegra->domain = iommu_domain_alloc(&platform_bus_type); 1105 if (!tegra->domain) { 1106 err = -ENOMEM; 1107 goto free; 1108 } 1109 1110 err = iova_cache_get(); 1111 if (err < 0) 1112 goto domain; 1113 } 1114 1115 mutex_init(&tegra->clients_lock); 1116 INIT_LIST_HEAD(&tegra->clients); 1117 1118 dev_set_drvdata(&dev->dev, drm); 1119 drm->dev_private = tegra; 1120 tegra->drm = drm; 1121 1122 drm_mode_config_init(drm); 1123 1124 drm->mode_config.min_width = 0; 1125 drm->mode_config.min_height = 0; 1126 1127 drm->mode_config.max_width = 4096; 1128 drm->mode_config.max_height = 4096; 1129 1130 drm->mode_config.allow_fb_modifiers = true; 1131 1132 drm->mode_config.normalize_zpos = true; 1133 1134 drm->mode_config.funcs = &tegra_drm_mode_config_funcs; 1135 drm->mode_config.helper_private = &tegra_drm_mode_config_helpers; 1136 1137 err = tegra_drm_fb_prepare(drm); 1138 if (err < 0) 1139 goto config; 1140 1141 drm_kms_helper_poll_init(drm); 1142 1143 err = host1x_device_init(dev); 1144 if (err < 0) 1145 goto fbdev; 1146 1147 if (tegra->use_explicit_iommu) { 1148 u64 carveout_start, carveout_end, gem_start, gem_end; 1149 u64 dma_mask = dma_get_mask(&dev->dev); 1150 dma_addr_t start, end; 1151 unsigned long order; 1152 1153 start = tegra->domain->geometry.aperture_start & dma_mask; 1154 end = tegra->domain->geometry.aperture_end & dma_mask; 1155 1156 gem_start = start; 1157 gem_end = end - CARVEOUT_SZ; 1158 carveout_start = gem_end + 1; 1159 carveout_end = end; 1160 1161 order = __ffs(tegra->domain->pgsize_bitmap); 1162 init_iova_domain(&tegra->carveout.domain, 1UL << order, 1163 carveout_start >> order); 1164 1165 tegra->carveout.shift = iova_shift(&tegra->carveout.domain); 1166 tegra->carveout.limit = carveout_end >> tegra->carveout.shift; 1167 1168 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1); 1169 mutex_init(&tegra->mm_lock); 1170 1171 DRM_DEBUG_DRIVER("IOMMU apertures:\n"); 1172 DRM_DEBUG_DRIVER(" GEM: %#llx-%#llx\n", gem_start, gem_end); 1173 DRM_DEBUG_DRIVER(" Carveout: %#llx-%#llx\n", carveout_start, 1174 carveout_end); 1175 } else if (tegra->domain) { 1176 iommu_domain_free(tegra->domain); 1177 tegra->domain = NULL; 1178 iova_cache_put(); 1179 } 1180 1181 if (tegra->hub) { 1182 err = tegra_display_hub_prepare(tegra->hub); 1183 if (err < 0) 1184 goto device; 1185 } 1186 1187 /* 1188 * We don't use the drm_irq_install() helpers provided by the DRM 1189 * core, so we need to set this manually in order to allow the 1190 * DRM_IOCTL_WAIT_VBLANK to operate correctly. 1191 */ 1192 drm->irq_enabled = true; 1193 1194 /* syncpoints are used for full 32-bit hardware VBLANK counters */ 1195 drm->max_vblank_count = 0xffffffff; 1196 1197 err = drm_vblank_init(drm, drm->mode_config.num_crtc); 1198 if (err < 0) 1199 goto hub; 1200 1201 drm_mode_config_reset(drm); 1202 1203 err = drm_fb_helper_remove_conflicting_framebuffers(NULL, "tegradrmfb", 1204 false); 1205 if (err < 0) 1206 goto hub; 1207 1208 err = tegra_drm_fb_init(drm); 1209 if (err < 0) 1210 goto hub; 1211 1212 err = drm_dev_register(drm, 0); 1213 if (err < 0) 1214 goto fb; 1215 1216 return 0; 1217 1218 fb: 1219 tegra_drm_fb_exit(drm); 1220 hub: 1221 if (tegra->hub) 1222 tegra_display_hub_cleanup(tegra->hub); 1223 device: 1224 if (tegra->domain) { 1225 mutex_destroy(&tegra->mm_lock); 1226 drm_mm_takedown(&tegra->mm); 1227 put_iova_domain(&tegra->carveout.domain); 1228 iova_cache_put(); 1229 } 1230 1231 host1x_device_exit(dev); 1232 fbdev: 1233 drm_kms_helper_poll_fini(drm); 1234 tegra_drm_fb_free(drm); 1235 config: 1236 drm_mode_config_cleanup(drm); 1237 domain: 1238 if (tegra->domain) 1239 iommu_domain_free(tegra->domain); 1240 free: 1241 kfree(tegra); 1242 put: 1243 drm_dev_put(drm); 1244 return err; 1245 } 1246 1247 static int host1x_drm_remove(struct host1x_device *dev) 1248 { 1249 struct drm_device *drm = dev_get_drvdata(&dev->dev); 1250 struct tegra_drm *tegra = drm->dev_private; 1251 int err; 1252 1253 drm_dev_unregister(drm); 1254 1255 drm_kms_helper_poll_fini(drm); 1256 tegra_drm_fb_exit(drm); 1257 drm_atomic_helper_shutdown(drm); 1258 drm_mode_config_cleanup(drm); 1259 1260 if (tegra->hub) 1261 tegra_display_hub_cleanup(tegra->hub); 1262 1263 err = host1x_device_exit(dev); 1264 if (err < 0) 1265 dev_err(&dev->dev, "host1x device cleanup failed: %d\n", err); 1266 1267 if (tegra->domain) { 1268 mutex_destroy(&tegra->mm_lock); 1269 drm_mm_takedown(&tegra->mm); 1270 put_iova_domain(&tegra->carveout.domain); 1271 iova_cache_put(); 1272 iommu_domain_free(tegra->domain); 1273 } 1274 1275 kfree(tegra); 1276 drm_dev_put(drm); 1277 1278 return 0; 1279 } 1280 1281 #ifdef CONFIG_PM_SLEEP 1282 static int host1x_drm_suspend(struct device *dev) 1283 { 1284 struct drm_device *drm = dev_get_drvdata(dev); 1285 1286 return drm_mode_config_helper_suspend(drm); 1287 } 1288 1289 static int host1x_drm_resume(struct device *dev) 1290 { 1291 struct drm_device *drm = dev_get_drvdata(dev); 1292 1293 return drm_mode_config_helper_resume(drm); 1294 } 1295 #endif 1296 1297 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend, 1298 host1x_drm_resume); 1299 1300 static const struct of_device_id host1x_drm_subdevs[] = { 1301 { .compatible = "nvidia,tegra20-dc", }, 1302 { .compatible = "nvidia,tegra20-hdmi", }, 1303 { .compatible = "nvidia,tegra20-gr2d", }, 1304 { .compatible = "nvidia,tegra20-gr3d", }, 1305 { .compatible = "nvidia,tegra30-dc", }, 1306 { .compatible = "nvidia,tegra30-hdmi", }, 1307 { .compatible = "nvidia,tegra30-gr2d", }, 1308 { .compatible = "nvidia,tegra30-gr3d", }, 1309 { .compatible = "nvidia,tegra114-dsi", }, 1310 { .compatible = "nvidia,tegra114-hdmi", }, 1311 { .compatible = "nvidia,tegra114-gr3d", }, 1312 { .compatible = "nvidia,tegra124-dc", }, 1313 { .compatible = "nvidia,tegra124-sor", }, 1314 { .compatible = "nvidia,tegra124-hdmi", }, 1315 { .compatible = "nvidia,tegra124-dsi", }, 1316 { .compatible = "nvidia,tegra124-vic", }, 1317 { .compatible = "nvidia,tegra132-dsi", }, 1318 { .compatible = "nvidia,tegra210-dc", }, 1319 { .compatible = "nvidia,tegra210-dsi", }, 1320 { .compatible = "nvidia,tegra210-sor", }, 1321 { .compatible = "nvidia,tegra210-sor1", }, 1322 { .compatible = "nvidia,tegra210-vic", }, 1323 { .compatible = "nvidia,tegra186-display", }, 1324 { .compatible = "nvidia,tegra186-dc", }, 1325 { .compatible = "nvidia,tegra186-sor", }, 1326 { .compatible = "nvidia,tegra186-sor1", }, 1327 { .compatible = "nvidia,tegra186-vic", }, 1328 { .compatible = "nvidia,tegra194-display", }, 1329 { .compatible = "nvidia,tegra194-dc", }, 1330 { .compatible = "nvidia,tegra194-sor", }, 1331 { .compatible = "nvidia,tegra194-vic", }, 1332 { /* sentinel */ } 1333 }; 1334 1335 static struct host1x_driver host1x_drm_driver = { 1336 .driver = { 1337 .name = "drm", 1338 .pm = &host1x_drm_pm_ops, 1339 }, 1340 .probe = host1x_drm_probe, 1341 .remove = host1x_drm_remove, 1342 .subdevs = host1x_drm_subdevs, 1343 }; 1344 1345 static struct platform_driver * const drivers[] = { 1346 &tegra_display_hub_driver, 1347 &tegra_dc_driver, 1348 &tegra_hdmi_driver, 1349 &tegra_dsi_driver, 1350 &tegra_dpaux_driver, 1351 &tegra_sor_driver, 1352 &tegra_gr2d_driver, 1353 &tegra_gr3d_driver, 1354 &tegra_vic_driver, 1355 }; 1356 1357 static int __init host1x_drm_init(void) 1358 { 1359 int err; 1360 1361 err = host1x_driver_register(&host1x_drm_driver); 1362 if (err < 0) 1363 return err; 1364 1365 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 1366 if (err < 0) 1367 goto unregister_host1x; 1368 1369 return 0; 1370 1371 unregister_host1x: 1372 host1x_driver_unregister(&host1x_drm_driver); 1373 return err; 1374 } 1375 module_init(host1x_drm_init); 1376 1377 static void __exit host1x_drm_exit(void) 1378 { 1379 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 1380 host1x_driver_unregister(&host1x_drm_driver); 1381 } 1382 module_exit(host1x_drm_exit); 1383 1384 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); 1385 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver"); 1386 MODULE_LICENSE("GPL v2"); 1387