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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 | /* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/spinlock.h> #include <linux/shmem_fs.h> #include <linux/dma-buf.h> #include <linux/pfn_t.h> #include "msm_drv.h" #include "msm_fence.h" #include "msm_gem.h" #include "msm_gpu.h" #include "msm_mmu.h" static dma_addr_t physaddr(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_drm_private *priv = obj->dev->dev_private; return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + priv->vram.paddr; } static bool use_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); return !msm_obj->vram_node; } /* * Cache sync.. this is a bit over-complicated, to fit dma-mapping * API. Really GPU cache is out of scope here (handled on cmdstream) * and all we need to do is invalidate newly allocated pages before * mapping to CPU as uncached/writecombine. * * On top of this, we have the added headache, that depending on * display generation, the display's iommu may be wired up to either * the toplevel drm device (mdss), or to the mdp sub-node, meaning * that here we either have dma-direct or iommu ops. * * Let this be a cautionary tail of abstraction gone wrong. */ static void sync_for_device(struct msm_gem_object *msm_obj) { struct device *dev = msm_obj->base.dev->dev; if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) { dma_sync_sg_for_device(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } else { dma_map_sg(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } } static void sync_for_cpu(struct msm_gem_object *msm_obj) { struct device *dev = msm_obj->base.dev->dev; if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) { dma_sync_sg_for_cpu(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } else { dma_unmap_sg(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } } /* allocate pages from VRAM carveout, used when no IOMMU: */ static struct page **get_pages_vram(struct drm_gem_object *obj, int npages) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_drm_private *priv = obj->dev->dev_private; dma_addr_t paddr; struct page **p; int ret, i; p = drm_malloc_ab(npages, sizeof(struct page *)); if (!p) return ERR_PTR(-ENOMEM); ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages, 0, DRM_MM_SEARCH_DEFAULT); if (ret) { drm_free_large(p); return ERR_PTR(ret); } paddr = physaddr(obj); for (i = 0; i < npages; i++) { p[i] = phys_to_page(paddr); paddr += PAGE_SIZE; } return p; } /* called with dev->struct_mutex held */ static struct page **get_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); if (!msm_obj->pages) { struct drm_device *dev = obj->dev; struct page **p; int npages = obj->size >> PAGE_SHIFT; if (use_pages(obj)) p = drm_gem_get_pages(obj); else p = get_pages_vram(obj, npages); if (IS_ERR(p)) { dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); return p; } msm_obj->pages = p; msm_obj->sgt = drm_prime_pages_to_sg(p, npages); if (IS_ERR(msm_obj->sgt)) { void *ptr = ERR_CAST(msm_obj->sgt); dev_err(dev->dev, "failed to allocate sgt\n"); msm_obj->sgt = NULL; return ptr; } /* For non-cached buffers, ensure the new pages are clean * because display controller, GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) sync_for_device(msm_obj); } return msm_obj->pages; } static void put_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); if (msm_obj->pages) { if (msm_obj->sgt) { /* For non-cached buffers, ensure the new * pages are clean because display controller, * GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) sync_for_cpu(msm_obj); sg_free_table(msm_obj->sgt); kfree(msm_obj->sgt); } if (use_pages(obj)) drm_gem_put_pages(obj, msm_obj->pages, true, false); else { drm_mm_remove_node(msm_obj->vram_node); drm_free_large(msm_obj->pages); } msm_obj->pages = NULL; } } struct page **msm_gem_get_pages(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct page **p; mutex_lock(&dev->struct_mutex); p = get_pages(obj); mutex_unlock(&dev->struct_mutex); return p; } void msm_gem_put_pages(struct drm_gem_object *obj) { /* when we start tracking the pin count, then do something here */ } int msm_gem_mmap_obj(struct drm_gem_object *obj, struct vm_area_struct *vma) { struct msm_gem_object *msm_obj = to_msm_bo(obj); vma->vm_flags &= ~VM_PFNMAP; vma->vm_flags |= VM_MIXEDMAP; if (msm_obj->flags & MSM_BO_WC) { vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); } else if (msm_obj->flags & MSM_BO_UNCACHED) { vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); } else { /* * Shunt off cached objs to shmem file so they have their own * address_space (so unmap_mapping_range does what we want, * in particular in the case of mmap'd dmabufs) */ fput(vma->vm_file); get_file(obj->filp); vma->vm_pgoff = 0; vma->vm_file = obj->filp; vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); } return 0; } int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) { int ret; ret = drm_gem_mmap(filp, vma); if (ret) { DBG("mmap failed: %d", ret); return ret; } return msm_gem_mmap_obj(vma->vm_private_data, vma); } int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_gem_object *obj = vma->vm_private_data; struct drm_device *dev = obj->dev; struct msm_drm_private *priv = dev->dev_private; struct page **pages; unsigned long pfn; pgoff_t pgoff; int ret; /* This should only happen if userspace tries to pass a mmap'd * but unfaulted gem bo vaddr into submit ioctl, triggering * a page fault while struct_mutex is already held. This is * not a valid use-case so just bail. */ if (priv->struct_mutex_task == current) return VM_FAULT_SIGBUS; /* Make sure we don't parallel update on a fault, nor move or remove * something from beneath our feet */ ret = mutex_lock_interruptible(&dev->struct_mutex); if (ret) goto out; /* make sure we have pages attached now */ pages = get_pages(obj); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto out_unlock; } /* We don't use vmf->pgoff since that has the fake offset: */ pgoff = ((unsigned long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT; pfn = page_to_pfn(pages[pgoff]); VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, pfn, pfn << PAGE_SHIFT); ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, __pfn_to_pfn_t(pfn, PFN_DEV)); out_unlock: mutex_unlock(&dev->struct_mutex); out: switch (ret) { case -EAGAIN: case 0: case -ERESTARTSYS: case -EINTR: case -EBUSY: /* * EBUSY is ok: this just means that another thread * already did the job. */ return VM_FAULT_NOPAGE; case -ENOMEM: return VM_FAULT_OOM; default: return VM_FAULT_SIGBUS; } } /** get mmap offset */ static uint64_t mmap_offset(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; int ret; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); /* Make it mmapable */ ret = drm_gem_create_mmap_offset(obj); if (ret) { dev_err(dev->dev, "could not allocate mmap offset\n"); return 0; } return drm_vma_node_offset_addr(&obj->vma_node); } uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) { uint64_t offset; mutex_lock(&obj->dev->struct_mutex); offset = mmap_offset(obj); mutex_unlock(&obj->dev->struct_mutex); return offset; } static void put_iova(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_drm_private *priv = obj->dev->dev_private; struct msm_gem_object *msm_obj = to_msm_bo(obj); int id; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { struct msm_mmu *mmu = priv->mmus[id]; if (mmu && msm_obj->domain[id].iova) { uint32_t offset = msm_obj->domain[id].iova; mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); msm_obj->domain[id].iova = 0; } } } /* should be called under struct_mutex.. although it can be called * from atomic context without struct_mutex to acquire an extra * iova ref if you know one is already held. * * That means when I do eventually need to add support for unpinning * the refcnt counter needs to be atomic_t. */ int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, uint32_t *iova) { struct msm_gem_object *msm_obj = to_msm_bo(obj); int ret = 0; if (!msm_obj->domain[id].iova) { struct msm_drm_private *priv = obj->dev->dev_private; struct page **pages = get_pages(obj); if (IS_ERR(pages)) return PTR_ERR(pages); if (iommu_present(&platform_bus_type)) { struct msm_mmu *mmu = priv->mmus[id]; uint32_t offset; if (WARN_ON(!mmu)) return -EINVAL; offset = (uint32_t)mmap_offset(obj); ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, obj->size, IOMMU_READ | IOMMU_WRITE); msm_obj->domain[id].iova = offset; } else { msm_obj->domain[id].iova = physaddr(obj); } } if (!ret) *iova = msm_obj->domain[id].iova; return ret; } /* get iova, taking a reference. Should have a matching put */ int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) { struct msm_gem_object *msm_obj = to_msm_bo(obj); int ret; /* this is safe right now because we don't unmap until the * bo is deleted: */ if (msm_obj->domain[id].iova) { *iova = msm_obj->domain[id].iova; return 0; } mutex_lock(&obj->dev->struct_mutex); ret = msm_gem_get_iova_locked(obj, id, iova); mutex_unlock(&obj->dev->struct_mutex); return ret; } /* get iova without taking a reference, used in places where you have * already done a 'msm_gem_get_iova()'. */ uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!msm_obj->domain[id].iova); return msm_obj->domain[id].iova; } void msm_gem_put_iova(struct drm_gem_object *obj, int id) { // XXX TODO .. // NOTE: probably don't need a _locked() version.. we wouldn't // normally unmap here, but instead just mark that it could be // unmapped (if the iova refcnt drops to zero), but then later // if another _get_iova_locked() fails we can start unmapping // things that are no longer needed.. } int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args) { args->pitch = align_pitch(args->width, args->bpp); args->size = PAGE_ALIGN(args->pitch * args->height); return msm_gem_new_handle(dev, file, args->size, MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); } int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, uint32_t handle, uint64_t *offset) { struct drm_gem_object *obj; int ret = 0; /* GEM does all our handle to object mapping */ obj = drm_gem_object_lookup(file, handle); if (obj == NULL) { ret = -ENOENT; goto fail; } *offset = msm_gem_mmap_offset(obj); drm_gem_object_unreference_unlocked(obj); fail: return ret; } void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); if (!msm_obj->vaddr) { struct page **pages = get_pages(obj); if (IS_ERR(pages)) return ERR_CAST(pages); msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); if (msm_obj->vaddr == NULL) return ERR_PTR(-ENOMEM); } msm_obj->vmap_count++; return msm_obj->vaddr; } void *msm_gem_get_vaddr(struct drm_gem_object *obj) { void *ret; mutex_lock(&obj->dev->struct_mutex); ret = msm_gem_get_vaddr_locked(obj); mutex_unlock(&obj->dev->struct_mutex); return ret; } void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); WARN_ON(msm_obj->vmap_count < 1); msm_obj->vmap_count--; } void msm_gem_put_vaddr(struct drm_gem_object *obj) { mutex_lock(&obj->dev->struct_mutex); msm_gem_put_vaddr_locked(obj); mutex_unlock(&obj->dev->struct_mutex); } /* Update madvise status, returns true if not purged, else * false or -errno. */ int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); if (msm_obj->madv != __MSM_MADV_PURGED) msm_obj->madv = madv; return (msm_obj->madv != __MSM_MADV_PURGED); } void msm_gem_purge(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); WARN_ON(!is_purgeable(msm_obj)); WARN_ON(obj->import_attach); put_iova(obj); msm_gem_vunmap(obj); put_pages(obj); msm_obj->madv = __MSM_MADV_PURGED; drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); drm_gem_free_mmap_offset(obj); /* Our goal here is to return as much of the memory as * is possible back to the system as we are called from OOM. * To do this we must instruct the shmfs to drop all of its * backing pages, *now*. */ shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1); } void msm_gem_vunmap(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) return; vunmap(msm_obj->vaddr); msm_obj->vaddr = NULL; } /* must be called before _move_to_active().. */ int msm_gem_sync_object(struct drm_gem_object *obj, struct msm_fence_context *fctx, bool exclusive) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct reservation_object_list *fobj; struct fence *fence; int i, ret; if (!exclusive) { /* NOTE: _reserve_shared() must happen before _add_shared_fence(), * which makes this a slightly strange place to call it. OTOH this * is a convenient can-fail point to hook it in. (And similar to * how etnaviv and nouveau handle this.) */ ret = reservation_object_reserve_shared(msm_obj->resv); if (ret) return ret; } fobj = reservation_object_get_list(msm_obj->resv); if (!fobj || (fobj->shared_count == 0)) { fence = reservation_object_get_excl(msm_obj->resv); /* don't need to wait on our own fences, since ring is fifo */ if (fence && (fence->context != fctx->context)) { ret = fence_wait(fence, true); if (ret) return ret; } } if (!exclusive || !fobj) return 0; for (i = 0; i < fobj->shared_count; i++) { fence = rcu_dereference_protected(fobj->shared[i], reservation_object_held(msm_obj->resv)); if (fence->context != fctx->context) { ret = fence_wait(fence, true); if (ret) return ret; } } return 0; } void msm_gem_move_to_active(struct drm_gem_object *obj, struct msm_gpu *gpu, bool exclusive, struct fence *fence) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); msm_obj->gpu = gpu; if (exclusive) reservation_object_add_excl_fence(msm_obj->resv, fence); else reservation_object_add_shared_fence(msm_obj->resv, fence); list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &gpu->active_list); } void msm_gem_move_to_inactive(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_drm_private *priv = dev->dev_private; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); msm_obj->gpu = NULL; list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); } int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) { struct msm_gem_object *msm_obj = to_msm_bo(obj); bool write = !!(op & MSM_PREP_WRITE); unsigned long remain = op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); long ret; ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, true, remain); if (ret == 0) return remain == 0 ? -EBUSY : -ETIMEDOUT; else if (ret < 0) return ret; /* TODO cache maintenance */ return 0; } int msm_gem_cpu_fini(struct drm_gem_object *obj) { /* TODO cache maintenance */ return 0; } #ifdef CONFIG_DEBUG_FS static void describe_fence(struct fence *fence, const char *type, struct seq_file *m) { if (!fence_is_signaled(fence)) seq_printf(m, "\t%9s: %s %s seq %u\n", type, fence->ops->get_driver_name(fence), fence->ops->get_timeline_name(fence), fence->seqno); } void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct reservation_object *robj = msm_obj->resv; struct reservation_object_list *fobj; struct fence *fence; uint64_t off = drm_vma_node_start(&obj->vma_node); const char *madv; WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); switch (msm_obj->madv) { case __MSM_MADV_PURGED: madv = " purged"; break; case MSM_MADV_DONTNEED: madv = " purgeable"; break; case MSM_MADV_WILLNEED: default: madv = ""; break; } seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu%s\n", msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', obj->name, obj->refcount.refcount.counter, off, msm_obj->vaddr, obj->size, madv); rcu_read_lock(); fobj = rcu_dereference(robj->fence); if (fobj) { unsigned int i, shared_count = fobj->shared_count; for (i = 0; i < shared_count; i++) { fence = rcu_dereference(fobj->shared[i]); describe_fence(fence, "Shared", m); } } fence = rcu_dereference(robj->fence_excl); if (fence) describe_fence(fence, "Exclusive", m); rcu_read_unlock(); } void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) { struct msm_gem_object *msm_obj; int count = 0; size_t size = 0; list_for_each_entry(msm_obj, list, mm_list) { struct drm_gem_object *obj = &msm_obj->base; seq_printf(m, " "); msm_gem_describe(obj, m); count++; size += obj->size; } seq_printf(m, "Total %d objects, %zu bytes\n", count, size); } #endif void msm_gem_free_object(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); /* object should not be on active list: */ WARN_ON(is_active(msm_obj)); list_del(&msm_obj->mm_list); put_iova(obj); if (obj->import_attach) { if (msm_obj->vaddr) dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); /* Don't drop the pages for imported dmabuf, as they are not * ours, just free the array we allocated: */ if (msm_obj->pages) drm_free_large(msm_obj->pages); drm_prime_gem_destroy(obj, msm_obj->sgt); } else { msm_gem_vunmap(obj); put_pages(obj); } if (msm_obj->resv == &msm_obj->_resv) reservation_object_fini(msm_obj->resv); drm_gem_object_release(obj); kfree(msm_obj); } /* convenience method to construct a GEM buffer object, and userspace handle */ int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, uint32_t size, uint32_t flags, uint32_t *handle) { struct drm_gem_object *obj; int ret; ret = mutex_lock_interruptible(&dev->struct_mutex); if (ret) return ret; obj = msm_gem_new(dev, size, flags); mutex_unlock(&dev->struct_mutex); if (IS_ERR(obj)) return PTR_ERR(obj); ret = drm_gem_handle_create(file, obj, handle); /* drop reference from allocate - handle holds it now */ drm_gem_object_unreference_unlocked(obj); return ret; } static int msm_gem_new_impl(struct drm_device *dev, uint32_t size, uint32_t flags, struct reservation_object *resv, struct drm_gem_object **obj) { struct msm_drm_private *priv = dev->dev_private; struct msm_gem_object *msm_obj; unsigned sz; bool use_vram = false; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); switch (flags & MSM_BO_CACHE_MASK) { case MSM_BO_UNCACHED: case MSM_BO_CACHED: case MSM_BO_WC: break; default: dev_err(dev->dev, "invalid cache flag: %x\n", (flags & MSM_BO_CACHE_MASK)); return -EINVAL; } if (!iommu_present(&platform_bus_type)) use_vram = true; else if ((flags & MSM_BO_STOLEN) && priv->vram.size) use_vram = true; if (WARN_ON(use_vram && !priv->vram.size)) return -EINVAL; sz = sizeof(*msm_obj); if (use_vram) sz += sizeof(struct drm_mm_node); msm_obj = kzalloc(sz, GFP_KERNEL); if (!msm_obj) return -ENOMEM; if (use_vram) msm_obj->vram_node = (void *)&msm_obj[1]; msm_obj->flags = flags; msm_obj->madv = MSM_MADV_WILLNEED; if (resv) { msm_obj->resv = resv; } else { msm_obj->resv = &msm_obj->_resv; reservation_object_init(msm_obj->resv); } INIT_LIST_HEAD(&msm_obj->submit_entry); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); *obj = &msm_obj->base; return 0; } struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags) { struct drm_gem_object *obj = NULL; int ret; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); size = PAGE_ALIGN(size); ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); if (ret) goto fail; if (use_pages(obj)) { ret = drm_gem_object_init(dev, obj, size); if (ret) goto fail; } else { drm_gem_private_object_init(dev, obj, size); } return obj; fail: drm_gem_object_unreference(obj); return ERR_PTR(ret); } struct drm_gem_object *msm_gem_import(struct drm_device *dev, struct dma_buf *dmabuf, struct sg_table *sgt) { struct msm_gem_object *msm_obj; struct drm_gem_object *obj; uint32_t size; int ret, npages; /* if we don't have IOMMU, don't bother pretending we can import: */ if (!iommu_present(&platform_bus_type)) { dev_err(dev->dev, "cannot import without IOMMU\n"); return ERR_PTR(-EINVAL); } size = PAGE_ALIGN(dmabuf->size); /* Take mutex so we can modify the inactive list in msm_gem_new_impl */ mutex_lock(&dev->struct_mutex); ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); mutex_unlock(&dev->struct_mutex); if (ret) goto fail; drm_gem_private_object_init(dev, obj, size); npages = size / PAGE_SIZE; msm_obj = to_msm_bo(obj); msm_obj->sgt = sgt; msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); if (!msm_obj->pages) { ret = -ENOMEM; goto fail; } ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); if (ret) goto fail; return obj; fail: drm_gem_object_unreference_unlocked(obj); return ERR_PTR(ret); } |