2035 lines · c
1/*2 * SPDX-License-Identifier: MIT3 *4 * Copyright © 2017 Intel Corporation5 */6 7#include <linux/prime_numbers.h>8#include <linux/string_helpers.h>9#include <linux/swap.h>10 11#include "i915_selftest.h"12 13#include "gem/i915_gem_internal.h"14#include "gem/i915_gem_lmem.h"15#include "gem/i915_gem_pm.h"16#include "gem/i915_gem_region.h"17 18#include "gt/intel_gt.h"19 20#include "igt_gem_utils.h"21#include "mock_context.h"22 23#include "selftests/mock_drm.h"24#include "selftests/mock_gem_device.h"25#include "selftests/mock_region.h"26#include "selftests/i915_random.h"27 28static struct i915_gem_context *hugepage_ctx(struct drm_i915_private *i915,29 struct file *file)30{31 struct i915_gem_context *ctx = live_context(i915, file);32 struct i915_address_space *vm;33 34 if (IS_ERR(ctx))35 return ctx;36 37 vm = ctx->vm;38 if (vm)39 WRITE_ONCE(vm->scrub_64K, true);40 41 return ctx;42}43 44static const unsigned int page_sizes[] = {45 I915_GTT_PAGE_SIZE_2M,46 I915_GTT_PAGE_SIZE_64K,47 I915_GTT_PAGE_SIZE_4K,48};49 50static unsigned int get_largest_page_size(struct drm_i915_private *i915,51 u64 rem)52{53 int i;54 55 for (i = 0; i < ARRAY_SIZE(page_sizes); ++i) {56 unsigned int page_size = page_sizes[i];57 58 if (HAS_PAGE_SIZES(i915, page_size) && rem >= page_size)59 return page_size;60 }61 62 return 0;63}64 65static void huge_pages_free_pages(struct sg_table *st)66{67 struct scatterlist *sg;68 69 for (sg = st->sgl; sg; sg = __sg_next(sg)) {70 if (sg_page(sg))71 __free_pages(sg_page(sg), get_order(sg->length));72 }73 74 sg_free_table(st);75 kfree(st);76}77 78static int get_huge_pages(struct drm_i915_gem_object *obj)79{80#define GFP (GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY)81 unsigned int page_mask = obj->mm.page_mask;82 struct sg_table *st;83 struct scatterlist *sg;84 unsigned int sg_page_sizes;85 u64 rem;86 87 /* restricted by sg_alloc_table */88 if (overflows_type(obj->base.size >> PAGE_SHIFT, unsigned int))89 return -E2BIG;90 91 st = kmalloc(sizeof(*st), GFP);92 if (!st)93 return -ENOMEM;94 95 if (sg_alloc_table(st, obj->base.size >> PAGE_SHIFT, GFP)) {96 kfree(st);97 return -ENOMEM;98 }99 100 rem = obj->base.size;101 sg = st->sgl;102 st->nents = 0;103 sg_page_sizes = 0;104 105 /*106 * Our goal here is simple, we want to greedily fill the object from107 * largest to smallest page-size, while ensuring that we use *every*108 * page-size as per the given page-mask.109 */110 do {111 unsigned int bit = ilog2(page_mask);112 unsigned int page_size = BIT(bit);113 int order = get_order(page_size);114 115 do {116 struct page *page;117 118 GEM_BUG_ON(order > MAX_PAGE_ORDER);119 page = alloc_pages(GFP | __GFP_ZERO, order);120 if (!page)121 goto err;122 123 sg_set_page(sg, page, page_size, 0);124 sg_page_sizes |= page_size;125 st->nents++;126 127 rem -= page_size;128 if (!rem) {129 sg_mark_end(sg);130 break;131 }132 133 sg = __sg_next(sg);134 } while ((rem - ((page_size-1) & page_mask)) >= page_size);135 136 page_mask &= (page_size-1);137 } while (page_mask);138 139 if (i915_gem_gtt_prepare_pages(obj, st))140 goto err;141 142 GEM_BUG_ON(sg_page_sizes != obj->mm.page_mask);143 __i915_gem_object_set_pages(obj, st);144 145 return 0;146 147err:148 sg_set_page(sg, NULL, 0, 0);149 sg_mark_end(sg);150 huge_pages_free_pages(st);151 152 return -ENOMEM;153}154 155static void put_huge_pages(struct drm_i915_gem_object *obj,156 struct sg_table *pages)157{158 i915_gem_gtt_finish_pages(obj, pages);159 huge_pages_free_pages(pages);160 161 obj->mm.dirty = false;162 163 __start_cpu_write(obj);164}165 166static const struct drm_i915_gem_object_ops huge_page_ops = {167 .name = "huge-gem",168 .flags = I915_GEM_OBJECT_IS_SHRINKABLE,169 .get_pages = get_huge_pages,170 .put_pages = put_huge_pages,171};172 173static struct drm_i915_gem_object *174huge_pages_object(struct drm_i915_private *i915,175 u64 size,176 unsigned int page_mask)177{178 static struct lock_class_key lock_class;179 struct drm_i915_gem_object *obj;180 unsigned int cache_level;181 182 GEM_BUG_ON(!size);183 GEM_BUG_ON(!IS_ALIGNED(size, BIT(__ffs(page_mask))));184 185 if (size >> PAGE_SHIFT > INT_MAX)186 return ERR_PTR(-E2BIG);187 188 if (overflows_type(size, obj->base.size))189 return ERR_PTR(-E2BIG);190 191 obj = i915_gem_object_alloc();192 if (!obj)193 return ERR_PTR(-ENOMEM);194 195 drm_gem_private_object_init(&i915->drm, &obj->base, size);196 i915_gem_object_init(obj, &huge_page_ops, &lock_class, 0);197 obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE;198 i915_gem_object_set_volatile(obj);199 200 obj->write_domain = I915_GEM_DOMAIN_CPU;201 obj->read_domains = I915_GEM_DOMAIN_CPU;202 203 cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE;204 i915_gem_object_set_cache_coherency(obj, cache_level);205 206 obj->mm.page_mask = page_mask;207 208 return obj;209}210 211static int fake_get_huge_pages(struct drm_i915_gem_object *obj)212{213 struct drm_i915_private *i915 = to_i915(obj->base.dev);214 const u64 max_len = rounddown_pow_of_two(UINT_MAX);215 struct sg_table *st;216 struct scatterlist *sg;217 u64 rem;218 219 /* restricted by sg_alloc_table */220 if (overflows_type(obj->base.size >> PAGE_SHIFT, unsigned int))221 return -E2BIG;222 223 st = kmalloc(sizeof(*st), GFP);224 if (!st)225 return -ENOMEM;226 227 if (sg_alloc_table(st, obj->base.size >> PAGE_SHIFT, GFP)) {228 kfree(st);229 return -ENOMEM;230 }231 232 /* Use optimal page sized chunks to fill in the sg table */233 rem = obj->base.size;234 sg = st->sgl;235 st->nents = 0;236 do {237 unsigned int page_size = get_largest_page_size(i915, rem);238 unsigned int len = min(page_size * div_u64(rem, page_size),239 max_len);240 241 GEM_BUG_ON(!page_size);242 243 sg->offset = 0;244 sg->length = len;245 sg_dma_len(sg) = len;246 sg_dma_address(sg) = page_size;247 248 st->nents++;249 250 rem -= len;251 if (!rem) {252 sg_mark_end(sg);253 break;254 }255 256 sg = sg_next(sg);257 } while (1);258 259 i915_sg_trim(st);260 261 __i915_gem_object_set_pages(obj, st);262 263 return 0;264}265 266static int fake_get_huge_pages_single(struct drm_i915_gem_object *obj)267{268 struct drm_i915_private *i915 = to_i915(obj->base.dev);269 struct sg_table *st;270 struct scatterlist *sg;271 unsigned int page_size;272 273 st = kmalloc(sizeof(*st), GFP);274 if (!st)275 return -ENOMEM;276 277 if (sg_alloc_table(st, 1, GFP)) {278 kfree(st);279 return -ENOMEM;280 }281 282 sg = st->sgl;283 st->nents = 1;284 285 page_size = get_largest_page_size(i915, obj->base.size);286 GEM_BUG_ON(!page_size);287 288 sg->offset = 0;289 sg->length = obj->base.size;290 sg_dma_len(sg) = obj->base.size;291 sg_dma_address(sg) = page_size;292 293 __i915_gem_object_set_pages(obj, st);294 295 return 0;296#undef GFP297}298 299static void fake_free_huge_pages(struct drm_i915_gem_object *obj,300 struct sg_table *pages)301{302 sg_free_table(pages);303 kfree(pages);304}305 306static void fake_put_huge_pages(struct drm_i915_gem_object *obj,307 struct sg_table *pages)308{309 fake_free_huge_pages(obj, pages);310 obj->mm.dirty = false;311}312 313static const struct drm_i915_gem_object_ops fake_ops = {314 .name = "fake-gem",315 .flags = I915_GEM_OBJECT_IS_SHRINKABLE,316 .get_pages = fake_get_huge_pages,317 .put_pages = fake_put_huge_pages,318};319 320static const struct drm_i915_gem_object_ops fake_ops_single = {321 .name = "fake-gem",322 .flags = I915_GEM_OBJECT_IS_SHRINKABLE,323 .get_pages = fake_get_huge_pages_single,324 .put_pages = fake_put_huge_pages,325};326 327static struct drm_i915_gem_object *328fake_huge_pages_object(struct drm_i915_private *i915, u64 size, bool single)329{330 static struct lock_class_key lock_class;331 struct drm_i915_gem_object *obj;332 333 GEM_BUG_ON(!size);334 GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));335 336 if (size >> PAGE_SHIFT > UINT_MAX)337 return ERR_PTR(-E2BIG);338 339 if (overflows_type(size, obj->base.size))340 return ERR_PTR(-E2BIG);341 342 obj = i915_gem_object_alloc();343 if (!obj)344 return ERR_PTR(-ENOMEM);345 346 drm_gem_private_object_init(&i915->drm, &obj->base, size);347 348 if (single)349 i915_gem_object_init(obj, &fake_ops_single, &lock_class, 0);350 else351 i915_gem_object_init(obj, &fake_ops, &lock_class, 0);352 353 i915_gem_object_set_volatile(obj);354 355 obj->write_domain = I915_GEM_DOMAIN_CPU;356 obj->read_domains = I915_GEM_DOMAIN_CPU;357 obj->pat_index = i915_gem_get_pat_index(i915, I915_CACHE_NONE);358 359 return obj;360}361 362static int igt_check_page_sizes(struct i915_vma *vma)363{364 struct drm_i915_private *i915 = vma->vm->i915;365 unsigned int supported = RUNTIME_INFO(i915)->page_sizes;366 struct drm_i915_gem_object *obj = vma->obj;367 int err;368 369 /* We have to wait for the async bind to complete before our asserts */370 err = i915_vma_sync(vma);371 if (err)372 return err;373 374 if (!HAS_PAGE_SIZES(i915, vma->page_sizes.sg)) {375 pr_err("unsupported page_sizes.sg=%u, supported=%u\n",376 vma->page_sizes.sg & ~supported, supported);377 err = -EINVAL;378 }379 380 if (!HAS_PAGE_SIZES(i915, vma->resource->page_sizes_gtt)) {381 pr_err("unsupported page_sizes.gtt=%u, supported=%u\n",382 vma->resource->page_sizes_gtt & ~supported, supported);383 err = -EINVAL;384 }385 386 if (vma->page_sizes.phys != obj->mm.page_sizes.phys) {387 pr_err("vma->page_sizes.phys(%u) != obj->mm.page_sizes.phys(%u)\n",388 vma->page_sizes.phys, obj->mm.page_sizes.phys);389 err = -EINVAL;390 }391 392 if (vma->page_sizes.sg != obj->mm.page_sizes.sg) {393 pr_err("vma->page_sizes.sg(%u) != obj->mm.page_sizes.sg(%u)\n",394 vma->page_sizes.sg, obj->mm.page_sizes.sg);395 err = -EINVAL;396 }397 398 /*399 * The dma-api is like a box of chocolates when it comes to the400 * alignment of dma addresses, however for LMEM we have total control401 * and so can guarantee alignment, likewise when we allocate our blocks402 * they should appear in descending order, and if we know that we align403 * to the largest page size for the GTT address, we should be able to404 * assert that if we see 2M physical pages then we should also get 2M405 * GTT pages. If we don't then something might be wrong in our406 * construction of the backing pages.407 *408 * Maintaining alignment is required to utilise huge pages in the ppGGT.409 */410 if (i915_gem_object_is_lmem(obj) &&411 IS_ALIGNED(i915_vma_offset(vma), SZ_2M) &&412 vma->page_sizes.sg & SZ_2M &&413 vma->resource->page_sizes_gtt < SZ_2M) {414 pr_err("gtt pages mismatch for LMEM, expected 2M GTT pages, sg(%u), gtt(%u)\n",415 vma->page_sizes.sg, vma->resource->page_sizes_gtt);416 err = -EINVAL;417 }418 419 return err;420}421 422static int igt_mock_exhaust_device_supported_pages(void *arg)423{424 struct i915_ppgtt *ppgtt = arg;425 struct drm_i915_private *i915 = ppgtt->vm.i915;426 unsigned int saved_mask = RUNTIME_INFO(i915)->page_sizes;427 struct drm_i915_gem_object *obj;428 struct i915_vma *vma;429 int i, j, single;430 int err;431 432 /*433 * Sanity check creating objects with every valid page support434 * combination for our mock device.435 */436 437 for (i = 1; i < BIT(ARRAY_SIZE(page_sizes)); i++) {438 unsigned int combination = SZ_4K; /* Required for ppGTT */439 440 for (j = 0; j < ARRAY_SIZE(page_sizes); j++) {441 if (i & BIT(j))442 combination |= page_sizes[j];443 }444 445 RUNTIME_INFO(i915)->page_sizes = combination;446 447 for (single = 0; single <= 1; ++single) {448 obj = fake_huge_pages_object(i915, combination, !!single);449 if (IS_ERR(obj)) {450 err = PTR_ERR(obj);451 goto out_device;452 }453 454 if (obj->base.size != combination) {455 pr_err("obj->base.size=%zu, expected=%u\n",456 obj->base.size, combination);457 err = -EINVAL;458 goto out_put;459 }460 461 vma = i915_vma_instance(obj, &ppgtt->vm, NULL);462 if (IS_ERR(vma)) {463 err = PTR_ERR(vma);464 goto out_put;465 }466 467 err = i915_vma_pin(vma, 0, 0, PIN_USER);468 if (err)469 goto out_put;470 471 err = igt_check_page_sizes(vma);472 473 if (vma->page_sizes.sg != combination) {474 pr_err("page_sizes.sg=%u, expected=%u\n",475 vma->page_sizes.sg, combination);476 err = -EINVAL;477 }478 479 i915_vma_unpin(vma);480 i915_gem_object_put(obj);481 482 if (err)483 goto out_device;484 }485 }486 487 goto out_device;488 489out_put:490 i915_gem_object_put(obj);491out_device:492 RUNTIME_INFO(i915)->page_sizes = saved_mask;493 494 return err;495}496 497static int igt_mock_memory_region_huge_pages(void *arg)498{499 const unsigned int flags[] = { 0, I915_BO_ALLOC_CONTIGUOUS };500 struct i915_ppgtt *ppgtt = arg;501 struct drm_i915_private *i915 = ppgtt->vm.i915;502 unsigned long supported = RUNTIME_INFO(i915)->page_sizes;503 struct intel_memory_region *mem;504 struct drm_i915_gem_object *obj;505 struct i915_vma *vma;506 int bit;507 int err = 0;508 509 mem = mock_region_create(i915, 0, SZ_2G, I915_GTT_PAGE_SIZE_4K, 0, 0);510 if (IS_ERR(mem)) {511 pr_err("%s failed to create memory region\n", __func__);512 return PTR_ERR(mem);513 }514 515 for_each_set_bit(bit, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {516 unsigned int page_size = BIT(bit);517 resource_size_t phys;518 int i;519 520 for (i = 0; i < ARRAY_SIZE(flags); ++i) {521 obj = i915_gem_object_create_region(mem,522 page_size, page_size,523 flags[i]);524 if (IS_ERR(obj)) {525 err = PTR_ERR(obj);526 goto out_region;527 }528 529 vma = i915_vma_instance(obj, &ppgtt->vm, NULL);530 if (IS_ERR(vma)) {531 err = PTR_ERR(vma);532 goto out_put;533 }534 535 err = i915_vma_pin(vma, 0, 0, PIN_USER);536 if (err)537 goto out_put;538 539 err = igt_check_page_sizes(vma);540 if (err)541 goto out_unpin;542 543 phys = i915_gem_object_get_dma_address(obj, 0);544 if (!IS_ALIGNED(phys, page_size)) {545 pr_err("%s addr misaligned(%pa) page_size=%u\n",546 __func__, &phys, page_size);547 err = -EINVAL;548 goto out_unpin;549 }550 551 if (vma->resource->page_sizes_gtt != page_size) {552 pr_err("%s page_sizes.gtt=%u, expected=%u\n",553 __func__, vma->resource->page_sizes_gtt,554 page_size);555 err = -EINVAL;556 goto out_unpin;557 }558 559 i915_vma_unpin(vma);560 __i915_gem_object_put_pages(obj);561 i915_gem_object_put(obj);562 }563 }564 565 goto out_region;566 567out_unpin:568 i915_vma_unpin(vma);569out_put:570 i915_gem_object_put(obj);571out_region:572 intel_memory_region_destroy(mem);573 return err;574}575 576static int igt_mock_ppgtt_misaligned_dma(void *arg)577{578 struct i915_ppgtt *ppgtt = arg;579 struct drm_i915_private *i915 = ppgtt->vm.i915;580 unsigned long supported = RUNTIME_INFO(i915)->page_sizes;581 struct drm_i915_gem_object *obj;582 int bit;583 int err;584 585 /*586 * Sanity check dma misalignment for huge pages -- the dma addresses we587 * insert into the paging structures need to always respect the page588 * size alignment.589 */590 591 bit = ilog2(I915_GTT_PAGE_SIZE_64K);592 593 for_each_set_bit_from(bit, &supported,594 ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {595 IGT_TIMEOUT(end_time);596 unsigned int page_size = BIT(bit);597 unsigned int flags = PIN_USER | PIN_OFFSET_FIXED;598 unsigned int offset;599 unsigned int size =600 round_up(page_size, I915_GTT_PAGE_SIZE_2M) << 1;601 struct i915_vma *vma;602 603 obj = fake_huge_pages_object(i915, size, true);604 if (IS_ERR(obj))605 return PTR_ERR(obj);606 607 if (obj->base.size != size) {608 pr_err("obj->base.size=%zu, expected=%u\n",609 obj->base.size, size);610 err = -EINVAL;611 goto out_put;612 }613 614 err = i915_gem_object_pin_pages_unlocked(obj);615 if (err)616 goto out_put;617 618 /* Force the page size for this object */619 obj->mm.page_sizes.sg = page_size;620 621 vma = i915_vma_instance(obj, &ppgtt->vm, NULL);622 if (IS_ERR(vma)) {623 err = PTR_ERR(vma);624 goto out_unpin;625 }626 627 err = i915_vma_pin(vma, 0, 0, flags);628 if (err)629 goto out_unpin;630 631 632 err = igt_check_page_sizes(vma);633 634 if (vma->resource->page_sizes_gtt != page_size) {635 pr_err("page_sizes.gtt=%u, expected %u\n",636 vma->resource->page_sizes_gtt, page_size);637 err = -EINVAL;638 }639 640 i915_vma_unpin(vma);641 642 if (err)643 goto out_unpin;644 645 /*646 * Try all the other valid offsets until the next647 * boundary -- should always fall back to using 4K648 * pages.649 */650 for (offset = 4096; offset < page_size; offset += 4096) {651 err = i915_vma_unbind_unlocked(vma);652 if (err)653 goto out_unpin;654 655 err = i915_vma_pin(vma, 0, 0, flags | offset);656 if (err)657 goto out_unpin;658 659 err = igt_check_page_sizes(vma);660 661 if (vma->resource->page_sizes_gtt != I915_GTT_PAGE_SIZE_4K) {662 pr_err("page_sizes.gtt=%u, expected %llu\n",663 vma->resource->page_sizes_gtt,664 I915_GTT_PAGE_SIZE_4K);665 err = -EINVAL;666 }667 668 i915_vma_unpin(vma);669 670 if (err)671 goto out_unpin;672 673 if (igt_timeout(end_time,674 "%s timed out at offset %x with page-size %x\n",675 __func__, offset, page_size))676 break;677 }678 679 i915_gem_object_lock(obj, NULL);680 i915_gem_object_unpin_pages(obj);681 __i915_gem_object_put_pages(obj);682 i915_gem_object_unlock(obj);683 i915_gem_object_put(obj);684 }685 686 return 0;687 688out_unpin:689 i915_gem_object_lock(obj, NULL);690 i915_gem_object_unpin_pages(obj);691 i915_gem_object_unlock(obj);692out_put:693 i915_gem_object_put(obj);694 695 return err;696}697 698static void close_object_list(struct list_head *objects)699{700 struct drm_i915_gem_object *obj, *on;701 702 list_for_each_entry_safe(obj, on, objects, st_link) {703 list_del(&obj->st_link);704 i915_gem_object_lock(obj, NULL);705 i915_gem_object_unpin_pages(obj);706 __i915_gem_object_put_pages(obj);707 i915_gem_object_unlock(obj);708 i915_gem_object_put(obj);709 }710}711 712static int igt_ppgtt_huge_fill(void *arg)713{714 struct drm_i915_private *i915 = arg;715 unsigned int supported = RUNTIME_INFO(i915)->page_sizes;716 bool has_pte64 = GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55);717 struct i915_address_space *vm;718 struct i915_gem_context *ctx;719 unsigned long max_pages;720 unsigned long page_num;721 struct file *file;722 bool single = false;723 LIST_HEAD(objects);724 IGT_TIMEOUT(end_time);725 int err = -ENODEV;726 727 if (supported == I915_GTT_PAGE_SIZE_4K)728 return 0;729 730 file = mock_file(i915);731 if (IS_ERR(file))732 return PTR_ERR(file);733 734 ctx = hugepage_ctx(i915, file);735 if (IS_ERR(ctx)) {736 err = PTR_ERR(ctx);737 goto out;738 }739 vm = i915_gem_context_get_eb_vm(ctx);740 max_pages = vm->total >> PAGE_SHIFT;741 742 for_each_prime_number_from(page_num, 1, max_pages) {743 struct drm_i915_gem_object *obj;744 u64 size = page_num << PAGE_SHIFT;745 struct i915_vma *vma;746 unsigned int expected_gtt = 0;747 int i;748 749 obj = fake_huge_pages_object(i915, size, single);750 if (IS_ERR(obj)) {751 err = PTR_ERR(obj);752 break;753 }754 755 if (obj->base.size != size) {756 pr_err("obj->base.size=%zd, expected=%llu\n",757 obj->base.size, size);758 i915_gem_object_put(obj);759 err = -EINVAL;760 break;761 }762 763 err = i915_gem_object_pin_pages_unlocked(obj);764 if (err) {765 i915_gem_object_put(obj);766 break;767 }768 769 list_add(&obj->st_link, &objects);770 771 vma = i915_vma_instance(obj, vm, NULL);772 if (IS_ERR(vma)) {773 err = PTR_ERR(vma);774 break;775 }776 777 /* vma start must be aligned to BIT(21) to allow 2M PTEs */778 err = i915_vma_pin(vma, 0, BIT(21), PIN_USER);779 if (err)780 break;781 782 err = igt_check_page_sizes(vma);783 if (err) {784 i915_vma_unpin(vma);785 break;786 }787 788 /*789 * Figure out the expected gtt page size knowing that we go from790 * largest to smallest page size sg chunks, and that we align to791 * the largest page size.792 */793 for (i = 0; i < ARRAY_SIZE(page_sizes); ++i) {794 unsigned int page_size = page_sizes[i];795 796 if (HAS_PAGE_SIZES(i915, page_size) &&797 size >= page_size) {798 expected_gtt |= page_size;799 size &= page_size-1;800 }801 }802 803 GEM_BUG_ON(!expected_gtt);804 GEM_BUG_ON(size);805 806 if (!has_pte64 && (obj->base.size < I915_GTT_PAGE_SIZE_2M ||807 expected_gtt & I915_GTT_PAGE_SIZE_2M))808 expected_gtt &= ~I915_GTT_PAGE_SIZE_64K;809 810 i915_vma_unpin(vma);811 812 if (!has_pte64 && vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) {813 if (!IS_ALIGNED(vma->node.start,814 I915_GTT_PAGE_SIZE_2M)) {815 pr_err("node.start(%llx) not aligned to 2M\n",816 vma->node.start);817 err = -EINVAL;818 break;819 }820 821 if (!IS_ALIGNED(vma->node.size,822 I915_GTT_PAGE_SIZE_2M)) {823 pr_err("node.size(%llx) not aligned to 2M\n",824 vma->node.size);825 err = -EINVAL;826 break;827 }828 }829 830 if (vma->resource->page_sizes_gtt != expected_gtt) {831 pr_err("gtt=%#x, expected=%#x, size=0x%zx, single=%s\n",832 vma->resource->page_sizes_gtt, expected_gtt,833 obj->base.size, str_yes_no(!!single));834 err = -EINVAL;835 break;836 }837 838 if (igt_timeout(end_time,839 "%s timed out at size %zd\n",840 __func__, obj->base.size))841 break;842 843 single = !single;844 }845 846 close_object_list(&objects);847 848 if (err == -ENOMEM || err == -ENOSPC)849 err = 0;850 851 i915_vm_put(vm);852out:853 fput(file);854 return err;855}856 857static int igt_ppgtt_64K(void *arg)858{859 struct drm_i915_private *i915 = arg;860 bool has_pte64 = GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55);861 struct drm_i915_gem_object *obj;862 struct i915_address_space *vm;863 struct i915_gem_context *ctx;864 struct file *file;865 const struct object_info {866 unsigned int size;867 unsigned int gtt;868 unsigned int offset;869 } objects[] = {870 /* Cases with forced padding/alignment */871 {872 .size = SZ_64K,873 .gtt = I915_GTT_PAGE_SIZE_64K,874 .offset = 0,875 },876 {877 .size = SZ_64K + SZ_4K,878 .gtt = I915_GTT_PAGE_SIZE_4K,879 .offset = 0,880 },881 {882 .size = SZ_64K - SZ_4K,883 .gtt = I915_GTT_PAGE_SIZE_4K,884 .offset = 0,885 },886 {887 .size = SZ_2M,888 .gtt = I915_GTT_PAGE_SIZE_64K,889 .offset = 0,890 },891 {892 .size = SZ_2M - SZ_4K,893 .gtt = I915_GTT_PAGE_SIZE_4K,894 .offset = 0,895 },896 {897 .size = SZ_2M + SZ_4K,898 .gtt = I915_GTT_PAGE_SIZE_64K | I915_GTT_PAGE_SIZE_4K,899 .offset = 0,900 },901 {902 .size = SZ_2M + SZ_64K,903 .gtt = I915_GTT_PAGE_SIZE_64K,904 .offset = 0,905 },906 {907 .size = SZ_2M - SZ_64K,908 .gtt = I915_GTT_PAGE_SIZE_64K,909 .offset = 0,910 },911 /* Try without any forced padding/alignment */912 {913 .size = SZ_64K,914 .offset = SZ_2M,915 .gtt = I915_GTT_PAGE_SIZE_4K,916 },917 {918 .size = SZ_128K,919 .offset = SZ_2M - SZ_64K,920 .gtt = I915_GTT_PAGE_SIZE_4K,921 },922 };923 struct i915_vma *vma;924 int i, single;925 int err;926 927 /*928 * Sanity check some of the trickiness with 64K pages -- either we can929 * safely mark the whole page-table(2M block) as 64K, or we have to930 * always fallback to 4K.931 */932 933 if (!HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_64K))934 return 0;935 936 file = mock_file(i915);937 if (IS_ERR(file))938 return PTR_ERR(file);939 940 ctx = hugepage_ctx(i915, file);941 if (IS_ERR(ctx)) {942 err = PTR_ERR(ctx);943 goto out;944 }945 vm = i915_gem_context_get_eb_vm(ctx);946 947 for (i = 0; i < ARRAY_SIZE(objects); ++i) {948 unsigned int size = objects[i].size;949 unsigned int expected_gtt = objects[i].gtt;950 unsigned int offset = objects[i].offset;951 unsigned int flags = PIN_USER;952 953 /*954 * For modern GTT models, the requirements for marking a page-table955 * as 64K have been relaxed. Account for this.956 */957 if (has_pte64) {958 expected_gtt = 0;959 if (size >= SZ_64K)960 expected_gtt |= I915_GTT_PAGE_SIZE_64K;961 if (size & (SZ_64K - 1))962 expected_gtt |= I915_GTT_PAGE_SIZE_4K;963 }964 965 for (single = 0; single <= 1; single++) {966 obj = fake_huge_pages_object(i915, size, !!single);967 if (IS_ERR(obj)) {968 err = PTR_ERR(obj);969 goto out_vm;970 }971 972 err = i915_gem_object_pin_pages_unlocked(obj);973 if (err)974 goto out_object_put;975 976 /*977 * Disable 2M pages -- We only want to use 64K/4K pages978 * for this test.979 */980 obj->mm.page_sizes.sg &= ~I915_GTT_PAGE_SIZE_2M;981 982 vma = i915_vma_instance(obj, vm, NULL);983 if (IS_ERR(vma)) {984 err = PTR_ERR(vma);985 goto out_object_unpin;986 }987 988 if (offset)989 flags |= PIN_OFFSET_FIXED | offset;990 991 err = i915_vma_pin(vma, 0, 0, flags);992 if (err)993 goto out_object_unpin;994 995 err = igt_check_page_sizes(vma);996 if (err)997 goto out_vma_unpin;998 999 if (!has_pte64 && !offset &&1000 vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) {1001 if (!IS_ALIGNED(vma->node.start,1002 I915_GTT_PAGE_SIZE_2M)) {1003 pr_err("node.start(%llx) not aligned to 2M\n",1004 vma->node.start);1005 err = -EINVAL;1006 goto out_vma_unpin;1007 }1008 1009 if (!IS_ALIGNED(vma->node.size,1010 I915_GTT_PAGE_SIZE_2M)) {1011 pr_err("node.size(%llx) not aligned to 2M\n",1012 vma->node.size);1013 err = -EINVAL;1014 goto out_vma_unpin;1015 }1016 }1017 1018 if (vma->resource->page_sizes_gtt != expected_gtt) {1019 pr_err("gtt=%#x, expected=%#x, i=%d, single=%s offset=%#x size=%#x\n",1020 vma->resource->page_sizes_gtt,1021 expected_gtt, i, str_yes_no(!!single),1022 offset, size);1023 err = -EINVAL;1024 goto out_vma_unpin;1025 }1026 1027 i915_vma_unpin(vma);1028 i915_gem_object_lock(obj, NULL);1029 i915_gem_object_unpin_pages(obj);1030 __i915_gem_object_put_pages(obj);1031 i915_gem_object_unlock(obj);1032 i915_gem_object_put(obj);1033 1034 i915_gem_drain_freed_objects(i915);1035 }1036 }1037 1038 goto out_vm;1039 1040out_vma_unpin:1041 i915_vma_unpin(vma);1042out_object_unpin:1043 i915_gem_object_lock(obj, NULL);1044 i915_gem_object_unpin_pages(obj);1045 i915_gem_object_unlock(obj);1046out_object_put:1047 i915_gem_object_put(obj);1048out_vm:1049 i915_vm_put(vm);1050out:1051 fput(file);1052 return err;1053}1054 1055static int gpu_write(struct intel_context *ce,1056 struct i915_vma *vma,1057 u32 dw,1058 u32 val)1059{1060 int err;1061 1062 i915_gem_object_lock(vma->obj, NULL);1063 err = i915_gem_object_set_to_gtt_domain(vma->obj, true);1064 i915_gem_object_unlock(vma->obj);1065 if (err)1066 return err;1067 1068 return igt_gpu_fill_dw(ce, vma, dw * sizeof(u32),1069 vma->size >> PAGE_SHIFT, val);1070}1071 1072static int1073__cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val)1074{1075 unsigned int needs_flush;1076 unsigned long n;1077 int err;1078 1079 i915_gem_object_lock(obj, NULL);1080 err = i915_gem_object_prepare_read(obj, &needs_flush);1081 if (err)1082 goto err_unlock;1083 1084 for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) {1085 u32 *ptr = kmap_local_page(i915_gem_object_get_page(obj, n));1086 1087 if (needs_flush & CLFLUSH_BEFORE)1088 drm_clflush_virt_range(ptr, PAGE_SIZE);1089 1090 if (ptr[dword] != val) {1091 pr_err("n=%lu ptr[%u]=%u, val=%u\n",1092 n, dword, ptr[dword], val);1093 kunmap_local(ptr);1094 err = -EINVAL;1095 break;1096 }1097 1098 kunmap_local(ptr);1099 }1100 1101 i915_gem_object_finish_access(obj);1102err_unlock:1103 i915_gem_object_unlock(obj);1104 1105 return err;1106}1107 1108static int __cpu_check_vmap(struct drm_i915_gem_object *obj, u32 dword, u32 val)1109{1110 unsigned long n = obj->base.size >> PAGE_SHIFT;1111 u32 *ptr;1112 int err;1113 1114 err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT);1115 if (err)1116 return err;1117 1118 ptr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC);1119 if (IS_ERR(ptr))1120 return PTR_ERR(ptr);1121 1122 ptr += dword;1123 while (n--) {1124 if (*ptr != val) {1125 pr_err("base[%u]=%08x, val=%08x\n",1126 dword, *ptr, val);1127 err = -EINVAL;1128 break;1129 }1130 1131 ptr += PAGE_SIZE / sizeof(*ptr);1132 }1133 1134 i915_gem_object_unpin_map(obj);1135 return err;1136}1137 1138static int cpu_check(struct drm_i915_gem_object *obj, u32 dword, u32 val)1139{1140 if (i915_gem_object_has_struct_page(obj))1141 return __cpu_check_shmem(obj, dword, val);1142 else1143 return __cpu_check_vmap(obj, dword, val);1144}1145 1146static int __igt_write_huge(struct intel_context *ce,1147 struct drm_i915_gem_object *obj,1148 u64 size, u64 offset,1149 u32 dword, u32 val)1150{1151 unsigned int flags = PIN_USER | PIN_OFFSET_FIXED;1152 struct i915_vma *vma;1153 int err;1154 1155 vma = i915_vma_instance(obj, ce->vm, NULL);1156 if (IS_ERR(vma))1157 return PTR_ERR(vma);1158 1159 err = i915_vma_pin(vma, size, 0, flags | offset);1160 if (err) {1161 /*1162 * The ggtt may have some pages reserved so1163 * refrain from erroring out.1164 */1165 if (err == -ENOSPC && i915_is_ggtt(ce->vm))1166 err = 0;1167 1168 return err;1169 }1170 1171 err = igt_check_page_sizes(vma);1172 if (err)1173 goto out_vma_unpin;1174 1175 err = gpu_write(ce, vma, dword, val);1176 if (err) {1177 pr_err("gpu-write failed at offset=%llx\n", offset);1178 goto out_vma_unpin;1179 }1180 1181 err = cpu_check(obj, dword, val);1182 if (err) {1183 pr_err("cpu-check failed at offset=%llx\n", offset);1184 goto out_vma_unpin;1185 }1186 1187out_vma_unpin:1188 i915_vma_unpin(vma);1189 return err;1190}1191 1192static int igt_write_huge(struct drm_i915_private *i915,1193 struct drm_i915_gem_object *obj)1194{1195 struct i915_gem_engines *engines;1196 struct i915_gem_engines_iter it;1197 struct intel_context *ce;1198 I915_RND_STATE(prng);1199 IGT_TIMEOUT(end_time);1200 unsigned int max_page_size;1201 unsigned int count;1202 struct i915_gem_context *ctx;1203 struct file *file;1204 u64 max;1205 u64 num;1206 u64 size;1207 int *order;1208 int i, n;1209 int err = 0;1210 1211 file = mock_file(i915);1212 if (IS_ERR(file))1213 return PTR_ERR(file);1214 1215 ctx = hugepage_ctx(i915, file);1216 if (IS_ERR(ctx)) {1217 err = PTR_ERR(ctx);1218 goto out;1219 }1220 1221 GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));1222 1223 size = obj->base.size;1224 if (obj->mm.page_sizes.sg & I915_GTT_PAGE_SIZE_64K &&1225 !HAS_64K_PAGES(i915))1226 size = round_up(size, I915_GTT_PAGE_SIZE_2M);1227 1228 n = 0;1229 count = 0;1230 max = U64_MAX;1231 for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {1232 count++;1233 if (!intel_engine_can_store_dword(ce->engine))1234 continue;1235 1236 max = min(max, ce->vm->total);1237 n++;1238 }1239 i915_gem_context_unlock_engines(ctx);1240 if (!n)1241 goto out;1242 1243 /*1244 * To keep things interesting when alternating between engines in our1245 * randomized order, lets also make feeding to the same engine a few1246 * times in succession a possibility by enlarging the permutation array.1247 */1248 order = i915_random_order(count * count, &prng);1249 if (!order) {1250 err = -ENOMEM;1251 goto out;1252 }1253 1254 max_page_size = rounddown_pow_of_two(obj->mm.page_sizes.sg);1255 max = div_u64(max - size, max_page_size);1256 1257 /*1258 * Try various offsets in an ascending/descending fashion until we1259 * timeout -- we want to avoid issues hidden by effectively always using1260 * offset = 0.1261 */1262 i = 0;1263 engines = i915_gem_context_lock_engines(ctx);1264 for_each_prime_number_from(num, 0, max) {1265 u64 offset_low = num * max_page_size;1266 u64 offset_high = (max - num) * max_page_size;1267 u32 dword = offset_in_page(num) / 4;1268 struct intel_context *ce;1269 1270 ce = engines->engines[order[i] % engines->num_engines];1271 i = (i + 1) % (count * count);1272 if (!ce || !intel_engine_can_store_dword(ce->engine))1273 continue;1274 1275 /*1276 * In order to utilize 64K pages we need to both pad the vma1277 * size and ensure the vma offset is at the start of the pt1278 * boundary, however to improve coverage we opt for testing both1279 * aligned and unaligned offsets.1280 *1281 * With PS64 this is no longer the case, but to ensure we1282 * sometimes get the compact layout for smaller objects, apply1283 * the round_up anyway.1284 */1285 if (obj->mm.page_sizes.sg & I915_GTT_PAGE_SIZE_64K)1286 offset_low = round_down(offset_low,1287 I915_GTT_PAGE_SIZE_2M);1288 1289 err = __igt_write_huge(ce, obj, size, offset_low,1290 dword, num + 1);1291 if (err)1292 break;1293 1294 err = __igt_write_huge(ce, obj, size, offset_high,1295 dword, num + 1);1296 if (err)1297 break;1298 1299 if (igt_timeout(end_time,1300 "%s timed out on %s, offset_low=%llx offset_high=%llx, max_page_size=%x\n",1301 __func__, ce->engine->name, offset_low, offset_high,1302 max_page_size))1303 break;1304 }1305 i915_gem_context_unlock_engines(ctx);1306 1307 kfree(order);1308 1309out:1310 fput(file);1311 return err;1312}1313 1314typedef struct drm_i915_gem_object *1315(*igt_create_fn)(struct drm_i915_private *i915, u32 size, u32 flags);1316 1317static inline bool igt_can_allocate_thp(struct drm_i915_private *i915)1318{1319 return i915->mm.gemfs && has_transparent_hugepage();1320}1321 1322static struct drm_i915_gem_object *1323igt_create_shmem(struct drm_i915_private *i915, u32 size, u32 flags)1324{1325 if (!igt_can_allocate_thp(i915)) {1326 pr_info("%s missing THP support, skipping\n", __func__);1327 return ERR_PTR(-ENODEV);1328 }1329 1330 return i915_gem_object_create_shmem(i915, size);1331}1332 1333static struct drm_i915_gem_object *1334igt_create_internal(struct drm_i915_private *i915, u32 size, u32 flags)1335{1336 return i915_gem_object_create_internal(i915, size);1337}1338 1339static struct drm_i915_gem_object *1340igt_create_system(struct drm_i915_private *i915, u32 size, u32 flags)1341{1342 return huge_pages_object(i915, size, size);1343}1344 1345static struct drm_i915_gem_object *1346igt_create_local(struct drm_i915_private *i915, u32 size, u32 flags)1347{1348 return i915_gem_object_create_lmem(i915, size, flags);1349}1350 1351static u32 igt_random_size(struct rnd_state *prng,1352 u32 min_page_size,1353 u32 max_page_size)1354{1355 u64 mask;1356 u32 size;1357 1358 GEM_BUG_ON(!is_power_of_2(min_page_size));1359 GEM_BUG_ON(!is_power_of_2(max_page_size));1360 GEM_BUG_ON(min_page_size < PAGE_SIZE);1361 GEM_BUG_ON(min_page_size > max_page_size);1362 1363 mask = ((max_page_size << 1ULL) - 1) & PAGE_MASK;1364 size = prandom_u32_state(prng) & mask;1365 if (size < min_page_size)1366 size |= min_page_size;1367 1368 return size;1369}1370 1371static int igt_ppgtt_smoke_huge(void *arg)1372{1373 struct drm_i915_private *i915 = arg;1374 struct drm_i915_gem_object *obj;1375 I915_RND_STATE(prng);1376 struct {1377 igt_create_fn fn;1378 u32 min;1379 u32 max;1380 } backends[] = {1381 { igt_create_internal, SZ_64K, SZ_2M, },1382 { igt_create_shmem, SZ_64K, SZ_32M, },1383 { igt_create_local, SZ_64K, SZ_1G, },1384 };1385 int err;1386 int i;1387 1388 /*1389 * Sanity check that the HW uses huge pages correctly through our1390 * various backends -- ensure that our writes land in the right place.1391 */1392 1393 for (i = 0; i < ARRAY_SIZE(backends); ++i) {1394 u32 min = backends[i].min;1395 u32 max = backends[i].max;1396 u32 size = max;1397 1398try_again:1399 size = igt_random_size(&prng, min, rounddown_pow_of_two(size));1400 1401 obj = backends[i].fn(i915, size, 0);1402 if (IS_ERR(obj)) {1403 err = PTR_ERR(obj);1404 if (err == -E2BIG) {1405 size >>= 1;1406 goto try_again;1407 } else if (err == -ENODEV) {1408 err = 0;1409 continue;1410 }1411 1412 return err;1413 }1414 1415 err = i915_gem_object_pin_pages_unlocked(obj);1416 if (err) {1417 if (err == -ENXIO || err == -E2BIG || err == -ENOMEM) {1418 i915_gem_object_put(obj);1419 size >>= 1;1420 goto try_again;1421 }1422 goto out_put;1423 }1424 1425 if (obj->mm.page_sizes.phys < min) {1426 pr_info("%s unable to allocate huge-page(s) with size=%u, i=%d\n",1427 __func__, size, i);1428 err = -ENOMEM;1429 goto out_unpin;1430 }1431 1432 err = igt_write_huge(i915, obj);1433 if (err) {1434 pr_err("%s write-huge failed with size=%u, i=%d\n",1435 __func__, size, i);1436 }1437out_unpin:1438 i915_gem_object_lock(obj, NULL);1439 i915_gem_object_unpin_pages(obj);1440 __i915_gem_object_put_pages(obj);1441 i915_gem_object_unlock(obj);1442out_put:1443 i915_gem_object_put(obj);1444 1445 if (err == -ENOMEM || err == -ENXIO)1446 err = 0;1447 1448 if (err)1449 break;1450 1451 cond_resched();1452 }1453 1454 return err;1455}1456 1457static int igt_ppgtt_sanity_check(void *arg)1458{1459 struct drm_i915_private *i915 = arg;1460 unsigned int supported = RUNTIME_INFO(i915)->page_sizes;1461 struct {1462 igt_create_fn fn;1463 unsigned int flags;1464 } backends[] = {1465 { igt_create_system, 0, },1466 { igt_create_local, 0, },1467 { igt_create_local, I915_BO_ALLOC_CONTIGUOUS, },1468 };1469 struct {1470 u32 size;1471 u32 pages;1472 } combos[] = {1473 { SZ_64K, SZ_64K },1474 { SZ_2M, SZ_2M },1475 { SZ_2M, SZ_64K },1476 { SZ_2M - SZ_64K, SZ_64K },1477 { SZ_2M - SZ_4K, SZ_64K | SZ_4K },1478 { SZ_2M + SZ_4K, SZ_64K | SZ_4K },1479 { SZ_2M + SZ_4K, SZ_2M | SZ_4K },1480 { SZ_2M + SZ_64K, SZ_2M | SZ_64K },1481 { SZ_2M + SZ_64K, SZ_64K },1482 };1483 int i, j;1484 int err;1485 1486 if (supported == I915_GTT_PAGE_SIZE_4K)1487 return 0;1488 1489 /*1490 * Sanity check that the HW behaves with a limited set of combinations.1491 * We already have a bunch of randomised testing, which should give us1492 * a decent amount of variation between runs, however we should keep1493 * this to limit the chances of introducing a temporary regression, by1494 * testing the most obvious cases that might make something blow up.1495 */1496 1497 for (i = 0; i < ARRAY_SIZE(backends); ++i) {1498 for (j = 0; j < ARRAY_SIZE(combos); ++j) {1499 struct drm_i915_gem_object *obj;1500 u32 size = combos[j].size;1501 u32 pages = combos[j].pages;1502 1503 obj = backends[i].fn(i915, size, backends[i].flags);1504 if (IS_ERR(obj)) {1505 err = PTR_ERR(obj);1506 if (err == -ENODEV) {1507 pr_info("Device lacks local memory, skipping\n");1508 err = 0;1509 break;1510 }1511 1512 return err;1513 }1514 1515 err = i915_gem_object_pin_pages_unlocked(obj);1516 if (err) {1517 i915_gem_object_put(obj);1518 goto out;1519 }1520 1521 GEM_BUG_ON(pages > obj->base.size);1522 pages = pages & supported;1523 1524 if (pages)1525 obj->mm.page_sizes.sg = pages;1526 1527 err = igt_write_huge(i915, obj);1528 1529 i915_gem_object_lock(obj, NULL);1530 i915_gem_object_unpin_pages(obj);1531 __i915_gem_object_put_pages(obj);1532 i915_gem_object_unlock(obj);1533 i915_gem_object_put(obj);1534 1535 if (err) {1536 pr_err("%s write-huge failed with size=%u pages=%u i=%d, j=%d\n",1537 __func__, size, pages, i, j);1538 goto out;1539 }1540 }1541 1542 cond_resched();1543 }1544 1545out:1546 if (err == -ENOMEM)1547 err = 0;1548 1549 return err;1550}1551 1552static int igt_ppgtt_compact(void *arg)1553{1554 struct drm_i915_private *i915 = arg;1555 struct drm_i915_gem_object *obj;1556 int err;1557 1558 /*1559 * Simple test to catch issues with compact 64K pages -- since the pt is1560 * compacted to 256B that gives us 32 entries per pt, however since the1561 * backing page for the pt is 4K, any extra entries we might incorrectly1562 * write out should be ignored by the HW. If ever hit such a case this1563 * test should catch it since some of our writes would land in scratch.1564 */1565 1566 if (!HAS_64K_PAGES(i915)) {1567 pr_info("device lacks compact 64K page support, skipping\n");1568 return 0;1569 }1570 1571 if (!HAS_LMEM(i915)) {1572 pr_info("device lacks LMEM support, skipping\n");1573 return 0;1574 }1575 1576 /* We want the range to cover multiple page-table boundaries. */1577 obj = i915_gem_object_create_lmem(i915, SZ_4M, 0);1578 if (IS_ERR(obj))1579 return PTR_ERR(obj);1580 1581 err = i915_gem_object_pin_pages_unlocked(obj);1582 if (err)1583 goto out_put;1584 1585 if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) {1586 pr_info("LMEM compact unable to allocate huge-page(s)\n");1587 goto out_unpin;1588 }1589 1590 /*1591 * Disable 2M GTT pages by forcing the page-size to 64K for the GTT1592 * insertion.1593 */1594 obj->mm.page_sizes.sg = I915_GTT_PAGE_SIZE_64K;1595 1596 err = igt_write_huge(i915, obj);1597 if (err)1598 pr_err("LMEM compact write-huge failed\n");1599 1600out_unpin:1601 i915_gem_object_unpin_pages(obj);1602out_put:1603 i915_gem_object_put(obj);1604 1605 if (err == -ENOMEM)1606 err = 0;1607 1608 return err;1609}1610 1611static int igt_ppgtt_mixed(void *arg)1612{1613 struct drm_i915_private *i915 = arg;1614 const unsigned long flags = PIN_OFFSET_FIXED | PIN_USER;1615 struct drm_i915_gem_object *obj, *on;1616 struct i915_gem_engines *engines;1617 struct i915_gem_engines_iter it;1618 struct i915_address_space *vm;1619 struct i915_gem_context *ctx;1620 struct intel_context *ce;1621 struct file *file;1622 I915_RND_STATE(prng);1623 LIST_HEAD(objects);1624 struct intel_memory_region *mr;1625 struct i915_vma *vma;1626 unsigned int count;1627 u32 i, addr;1628 int *order;1629 int n, err;1630 1631 /*1632 * Sanity check mixing 4K and 64K pages within the same page-table via1633 * the new PS64 TLB hint.1634 */1635 1636 if (!HAS_64K_PAGES(i915)) {1637 pr_info("device lacks PS64, skipping\n");1638 return 0;1639 }1640 1641 file = mock_file(i915);1642 if (IS_ERR(file))1643 return PTR_ERR(file);1644 1645 ctx = hugepage_ctx(i915, file);1646 if (IS_ERR(ctx)) {1647 err = PTR_ERR(ctx);1648 goto out;1649 }1650 vm = i915_gem_context_get_eb_vm(ctx);1651 1652 i = 0;1653 addr = 0;1654 do {1655 u32 sz;1656 1657 sz = i915_prandom_u32_max_state(SZ_4M, &prng);1658 sz = max_t(u32, sz, SZ_4K);1659 1660 mr = i915->mm.regions[INTEL_REGION_LMEM_0];1661 if (i & 1)1662 mr = i915->mm.regions[INTEL_REGION_SMEM];1663 1664 obj = i915_gem_object_create_region(mr, sz, 0, 0);1665 if (IS_ERR(obj)) {1666 err = PTR_ERR(obj);1667 goto out_vm;1668 }1669 1670 list_add_tail(&obj->st_link, &objects);1671 1672 vma = i915_vma_instance(obj, vm, NULL);1673 if (IS_ERR(vma)) {1674 err = PTR_ERR(vma);1675 goto err_put;1676 }1677 1678 addr = round_up(addr, mr->min_page_size);1679 err = i915_vma_pin(vma, 0, 0, addr | flags);1680 if (err)1681 goto err_put;1682 1683 if (mr->type == INTEL_MEMORY_LOCAL &&1684 (vma->resource->page_sizes_gtt & I915_GTT_PAGE_SIZE_4K)) {1685 err = -EINVAL;1686 goto err_put;1687 }1688 1689 addr += obj->base.size;1690 i++;1691 } while (addr <= SZ_16M);1692 1693 n = 0;1694 count = 0;1695 for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {1696 count++;1697 if (!intel_engine_can_store_dword(ce->engine))1698 continue;1699 1700 n++;1701 }1702 i915_gem_context_unlock_engines(ctx);1703 if (!n)1704 goto err_put;1705 1706 order = i915_random_order(count * count, &prng);1707 if (!order) {1708 err = -ENOMEM;1709 goto err_put;1710 }1711 1712 i = 0;1713 addr = 0;1714 engines = i915_gem_context_lock_engines(ctx);1715 list_for_each_entry(obj, &objects, st_link) {1716 u32 rnd = i915_prandom_u32_max_state(UINT_MAX, &prng);1717 1718 addr = round_up(addr, obj->mm.region->min_page_size);1719 1720 ce = engines->engines[order[i] % engines->num_engines];1721 i = (i + 1) % (count * count);1722 if (!ce || !intel_engine_can_store_dword(ce->engine))1723 continue;1724 1725 err = __igt_write_huge(ce, obj, obj->base.size, addr, 0, rnd);1726 if (err)1727 break;1728 1729 err = __igt_write_huge(ce, obj, obj->base.size, addr,1730 offset_in_page(rnd) / sizeof(u32), rnd + 1);1731 if (err)1732 break;1733 1734 err = __igt_write_huge(ce, obj, obj->base.size, addr,1735 (PAGE_SIZE / sizeof(u32)) - 1,1736 rnd + 2);1737 if (err)1738 break;1739 1740 addr += obj->base.size;1741 1742 cond_resched();1743 }1744 1745 i915_gem_context_unlock_engines(ctx);1746 kfree(order);1747err_put:1748 list_for_each_entry_safe(obj, on, &objects, st_link) {1749 list_del(&obj->st_link);1750 i915_gem_object_put(obj);1751 }1752out_vm:1753 i915_vm_put(vm);1754out:1755 fput(file);1756 return err;1757}1758 1759static int igt_tmpfs_fallback(void *arg)1760{1761 struct drm_i915_private *i915 = arg;1762 struct i915_address_space *vm;1763 struct i915_gem_context *ctx;1764 struct vfsmount *gemfs = i915->mm.gemfs;1765 struct drm_i915_gem_object *obj;1766 struct i915_vma *vma;1767 struct file *file;1768 u32 *vaddr;1769 int err = 0;1770 1771 file = mock_file(i915);1772 if (IS_ERR(file))1773 return PTR_ERR(file);1774 1775 ctx = hugepage_ctx(i915, file);1776 if (IS_ERR(ctx)) {1777 err = PTR_ERR(ctx);1778 goto out;1779 }1780 vm = i915_gem_context_get_eb_vm(ctx);1781 1782 /*1783 * Make sure that we don't burst into a ball of flames upon falling back1784 * to tmpfs, which we rely on if on the off-chance we encouter a failure1785 * when setting up gemfs.1786 */1787 1788 i915->mm.gemfs = NULL;1789 1790 obj = i915_gem_object_create_shmem(i915, PAGE_SIZE);1791 if (IS_ERR(obj)) {1792 err = PTR_ERR(obj);1793 goto out_restore;1794 }1795 1796 vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);1797 if (IS_ERR(vaddr)) {1798 err = PTR_ERR(vaddr);1799 goto out_put;1800 }1801 *vaddr = 0xdeadbeaf;1802 1803 __i915_gem_object_flush_map(obj, 0, 64);1804 i915_gem_object_unpin_map(obj);1805 1806 vma = i915_vma_instance(obj, vm, NULL);1807 if (IS_ERR(vma)) {1808 err = PTR_ERR(vma);1809 goto out_put;1810 }1811 1812 err = i915_vma_pin(vma, 0, 0, PIN_USER);1813 if (err)1814 goto out_put;1815 1816 err = igt_check_page_sizes(vma);1817 1818 i915_vma_unpin(vma);1819out_put:1820 i915_gem_object_put(obj);1821out_restore:1822 i915->mm.gemfs = gemfs;1823 1824 i915_vm_put(vm);1825out:1826 fput(file);1827 return err;1828}1829 1830static int igt_shrink_thp(void *arg)1831{1832 struct drm_i915_private *i915 = arg;1833 struct i915_address_space *vm;1834 struct i915_gem_context *ctx;1835 struct drm_i915_gem_object *obj;1836 struct i915_gem_engines_iter it;1837 struct intel_context *ce;1838 struct i915_vma *vma;1839 struct file *file;1840 unsigned int flags = PIN_USER;1841 unsigned int n;1842 intel_wakeref_t wf;1843 bool should_swap;1844 int err;1845 1846 if (!igt_can_allocate_thp(i915)) {1847 pr_info("missing THP support, skipping\n");1848 return 0;1849 }1850 1851 file = mock_file(i915);1852 if (IS_ERR(file))1853 return PTR_ERR(file);1854 1855 ctx = hugepage_ctx(i915, file);1856 if (IS_ERR(ctx)) {1857 err = PTR_ERR(ctx);1858 goto out;1859 }1860 vm = i915_gem_context_get_eb_vm(ctx);1861 1862 /*1863 * Sanity check shrinking huge-paged object -- make sure nothing blows1864 * up.1865 */1866 1867 obj = i915_gem_object_create_shmem(i915, SZ_2M);1868 if (IS_ERR(obj)) {1869 err = PTR_ERR(obj);1870 goto out_vm;1871 }1872 1873 vma = i915_vma_instance(obj, vm, NULL);1874 if (IS_ERR(vma)) {1875 err = PTR_ERR(vma);1876 goto out_put;1877 }1878 1879 wf = intel_runtime_pm_get(&i915->runtime_pm); /* active shrink */1880 1881 err = i915_vma_pin(vma, 0, 0, flags);1882 if (err)1883 goto out_wf;1884 1885 if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_2M) {1886 pr_info("failed to allocate THP, finishing test early\n");1887 goto out_unpin;1888 }1889 1890 err = igt_check_page_sizes(vma);1891 if (err)1892 goto out_unpin;1893 1894 n = 0;1895 1896 for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {1897 if (!intel_engine_can_store_dword(ce->engine))1898 continue;1899 1900 err = gpu_write(ce, vma, n++, 0xdeadbeaf);1901 if (err)1902 break;1903 }1904 i915_gem_context_unlock_engines(ctx);1905 /*1906 * Nuke everything *before* we unpin the pages so we can be reasonably1907 * sure that when later checking get_nr_swap_pages() that some random1908 * leftover object doesn't steal the remaining swap space.1909 */1910 i915_gem_shrink(NULL, i915, -1UL, NULL,1911 I915_SHRINK_BOUND |1912 I915_SHRINK_UNBOUND |1913 I915_SHRINK_ACTIVE);1914 i915_vma_unpin(vma);1915 if (err)1916 goto out_wf;1917 1918 /*1919 * Now that the pages are *unpinned* shrinking should invoke1920 * shmem to truncate our pages, if we have available swap.1921 */1922 should_swap = get_nr_swap_pages() > 0;1923 i915_gem_shrink(NULL, i915, -1UL, NULL,1924 I915_SHRINK_BOUND |1925 I915_SHRINK_UNBOUND |1926 I915_SHRINK_ACTIVE |1927 I915_SHRINK_WRITEBACK);1928 if (should_swap == i915_gem_object_has_pages(obj)) {1929 pr_err("unexpected pages mismatch, should_swap=%s\n",1930 str_yes_no(should_swap));1931 err = -EINVAL;1932 goto out_wf;1933 }1934 1935 if (should_swap == (obj->mm.page_sizes.sg || obj->mm.page_sizes.phys)) {1936 pr_err("unexpected residual page-size bits, should_swap=%s\n",1937 str_yes_no(should_swap));1938 err = -EINVAL;1939 goto out_wf;1940 }1941 1942 err = i915_vma_pin(vma, 0, 0, flags);1943 if (err)1944 goto out_wf;1945 1946 while (n--) {1947 err = cpu_check(obj, n, 0xdeadbeaf);1948 if (err)1949 break;1950 }1951 1952out_unpin:1953 i915_vma_unpin(vma);1954out_wf:1955 intel_runtime_pm_put(&i915->runtime_pm, wf);1956out_put:1957 i915_gem_object_put(obj);1958out_vm:1959 i915_vm_put(vm);1960out:1961 fput(file);1962 return err;1963}1964 1965int i915_gem_huge_page_mock_selftests(void)1966{1967 static const struct i915_subtest tests[] = {1968 SUBTEST(igt_mock_exhaust_device_supported_pages),1969 SUBTEST(igt_mock_memory_region_huge_pages),1970 SUBTEST(igt_mock_ppgtt_misaligned_dma),1971 };1972 struct drm_i915_private *i915;1973 struct i915_ppgtt *ppgtt;1974 int err;1975 1976 i915 = mock_gem_device();1977 if (!i915)1978 return -ENOMEM;1979 1980 /* Pretend to be a device which supports the 48b PPGTT */1981 RUNTIME_INFO(i915)->ppgtt_type = INTEL_PPGTT_FULL;1982 RUNTIME_INFO(i915)->ppgtt_size = 48;1983 1984 ppgtt = i915_ppgtt_create(to_gt(i915), 0);1985 if (IS_ERR(ppgtt)) {1986 err = PTR_ERR(ppgtt);1987 goto out_unlock;1988 }1989 1990 if (!i915_vm_is_4lvl(&ppgtt->vm)) {1991 pr_err("failed to create 48b PPGTT\n");1992 err = -EINVAL;1993 goto out_put;1994 }1995 1996 /* If we were ever hit this then it's time to mock the 64K scratch */1997 if (!i915_vm_has_scratch_64K(&ppgtt->vm)) {1998 pr_err("PPGTT missing 64K scratch page\n");1999 err = -EINVAL;2000 goto out_put;2001 }2002 2003 err = i915_subtests(tests, ppgtt);2004 2005out_put:2006 i915_vm_put(&ppgtt->vm);2007out_unlock:2008 mock_destroy_device(i915);2009 return err;2010}2011 2012int i915_gem_huge_page_live_selftests(struct drm_i915_private *i915)2013{2014 static const struct i915_subtest tests[] = {2015 SUBTEST(igt_shrink_thp),2016 SUBTEST(igt_tmpfs_fallback),2017 SUBTEST(igt_ppgtt_smoke_huge),2018 SUBTEST(igt_ppgtt_sanity_check),2019 SUBTEST(igt_ppgtt_compact),2020 SUBTEST(igt_ppgtt_mixed),2021 SUBTEST(igt_ppgtt_huge_fill),2022 SUBTEST(igt_ppgtt_64K),2023 };2024 2025 if (!HAS_PPGTT(i915)) {2026 pr_info("PPGTT not supported, skipping live-selftests\n");2027 return 0;2028 }2029 2030 if (intel_gt_is_wedged(to_gt(i915)))2031 return 0;2032 2033 return i915_live_subtests(tests, i915);2034}2035