diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/selftests/huge_pages.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/selftests/huge_pages.c | 2034 |
1 files changed, 2034 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c new file mode 100644 index 0000000000..6b9f6cf50b --- /dev/null +++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c @@ -0,0 +1,2034 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2017 Intel Corporation + */ + +#include <linux/prime_numbers.h> +#include <linux/string_helpers.h> +#include <linux/swap.h> + +#include "i915_selftest.h" + +#include "gem/i915_gem_internal.h" +#include "gem/i915_gem_lmem.h" +#include "gem/i915_gem_pm.h" +#include "gem/i915_gem_region.h" + +#include "gt/intel_gt.h" + +#include "igt_gem_utils.h" +#include "mock_context.h" + +#include "selftests/mock_drm.h" +#include "selftests/mock_gem_device.h" +#include "selftests/mock_region.h" +#include "selftests/i915_random.h" + +static struct i915_gem_context *hugepage_ctx(struct drm_i915_private *i915, + struct file *file) +{ + struct i915_gem_context *ctx = live_context(i915, file); + struct i915_address_space *vm; + + if (IS_ERR(ctx)) + return ctx; + + vm = ctx->vm; + if (vm) + WRITE_ONCE(vm->scrub_64K, true); + + return ctx; +} + +static const unsigned int page_sizes[] = { + I915_GTT_PAGE_SIZE_2M, + I915_GTT_PAGE_SIZE_64K, + I915_GTT_PAGE_SIZE_4K, +}; + +static unsigned int get_largest_page_size(struct drm_i915_private *i915, + u64 rem) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(page_sizes); ++i) { + unsigned int page_size = page_sizes[i]; + + if (HAS_PAGE_SIZES(i915, page_size) && rem >= page_size) + return page_size; + } + + return 0; +} + +static void huge_pages_free_pages(struct sg_table *st) +{ + struct scatterlist *sg; + + for (sg = st->sgl; sg; sg = __sg_next(sg)) { + if (sg_page(sg)) + __free_pages(sg_page(sg), get_order(sg->length)); + } + + sg_free_table(st); + kfree(st); +} + +static int get_huge_pages(struct drm_i915_gem_object *obj) +{ +#define GFP (GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY) + unsigned int page_mask = obj->mm.page_mask; + struct sg_table *st; + struct scatterlist *sg; + unsigned int sg_page_sizes; + u64 rem; + + /* restricted by sg_alloc_table */ + if (overflows_type(obj->base.size >> PAGE_SHIFT, unsigned int)) + return -E2BIG; + + st = kmalloc(sizeof(*st), GFP); + if (!st) + return -ENOMEM; + + if (sg_alloc_table(st, obj->base.size >> PAGE_SHIFT, GFP)) { + kfree(st); + return -ENOMEM; + } + + rem = obj->base.size; + sg = st->sgl; + st->nents = 0; + sg_page_sizes = 0; + + /* + * Our goal here is simple, we want to greedily fill the object from + * largest to smallest page-size, while ensuring that we use *every* + * page-size as per the given page-mask. + */ + do { + unsigned int bit = ilog2(page_mask); + unsigned int page_size = BIT(bit); + int order = get_order(page_size); + + do { + struct page *page; + + GEM_BUG_ON(order > MAX_ORDER); + page = alloc_pages(GFP | __GFP_ZERO, order); + if (!page) + goto err; + + sg_set_page(sg, page, page_size, 0); + sg_page_sizes |= page_size; + st->nents++; + + rem -= page_size; + if (!rem) { + sg_mark_end(sg); + break; + } + + sg = __sg_next(sg); + } while ((rem - ((page_size-1) & page_mask)) >= page_size); + + page_mask &= (page_size-1); + } while (page_mask); + + if (i915_gem_gtt_prepare_pages(obj, st)) + goto err; + + GEM_BUG_ON(sg_page_sizes != obj->mm.page_mask); + __i915_gem_object_set_pages(obj, st); + + return 0; + +err: + sg_set_page(sg, NULL, 0, 0); + sg_mark_end(sg); + huge_pages_free_pages(st); + + return -ENOMEM; +} + +static void put_huge_pages(struct drm_i915_gem_object *obj, + struct sg_table *pages) +{ + i915_gem_gtt_finish_pages(obj, pages); + huge_pages_free_pages(pages); + + obj->mm.dirty = false; + + __start_cpu_write(obj); +} + +static const struct drm_i915_gem_object_ops huge_page_ops = { + .name = "huge-gem", + .flags = I915_GEM_OBJECT_IS_SHRINKABLE, + .get_pages = get_huge_pages, + .put_pages = put_huge_pages, +}; + +static struct drm_i915_gem_object * +huge_pages_object(struct drm_i915_private *i915, + u64 size, + unsigned int page_mask) +{ + static struct lock_class_key lock_class; + struct drm_i915_gem_object *obj; + unsigned int cache_level; + + GEM_BUG_ON(!size); + GEM_BUG_ON(!IS_ALIGNED(size, BIT(__ffs(page_mask)))); + + if (size >> PAGE_SHIFT > INT_MAX) + return ERR_PTR(-E2BIG); + + if (overflows_type(size, obj->base.size)) + return ERR_PTR(-E2BIG); + + obj = i915_gem_object_alloc(); + if (!obj) + return ERR_PTR(-ENOMEM); + + drm_gem_private_object_init(&i915->drm, &obj->base, size); + i915_gem_object_init(obj, &huge_page_ops, &lock_class, 0); + obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE; + i915_gem_object_set_volatile(obj); + + obj->write_domain = I915_GEM_DOMAIN_CPU; + obj->read_domains = I915_GEM_DOMAIN_CPU; + + cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE; + i915_gem_object_set_cache_coherency(obj, cache_level); + + obj->mm.page_mask = page_mask; + + return obj; +} + +static int fake_get_huge_pages(struct drm_i915_gem_object *obj) +{ + struct drm_i915_private *i915 = to_i915(obj->base.dev); + const u64 max_len = rounddown_pow_of_two(UINT_MAX); + struct sg_table *st; + struct scatterlist *sg; + u64 rem; + + /* restricted by sg_alloc_table */ + if (overflows_type(obj->base.size >> PAGE_SHIFT, unsigned int)) + return -E2BIG; + + st = kmalloc(sizeof(*st), GFP); + if (!st) + return -ENOMEM; + + if (sg_alloc_table(st, obj->base.size >> PAGE_SHIFT, GFP)) { + kfree(st); + return -ENOMEM; + } + + /* Use optimal page sized chunks to fill in the sg table */ + rem = obj->base.size; + sg = st->sgl; + st->nents = 0; + do { + unsigned int page_size = get_largest_page_size(i915, rem); + unsigned int len = min(page_size * div_u64(rem, page_size), + max_len); + + GEM_BUG_ON(!page_size); + + sg->offset = 0; + sg->length = len; + sg_dma_len(sg) = len; + sg_dma_address(sg) = page_size; + + st->nents++; + + rem -= len; + if (!rem) { + sg_mark_end(sg); + break; + } + + sg = sg_next(sg); + } while (1); + + i915_sg_trim(st); + + __i915_gem_object_set_pages(obj, st); + + return 0; +} + +static int fake_get_huge_pages_single(struct drm_i915_gem_object *obj) +{ + struct drm_i915_private *i915 = to_i915(obj->base.dev); + struct sg_table *st; + struct scatterlist *sg; + unsigned int page_size; + + st = kmalloc(sizeof(*st), GFP); + if (!st) + return -ENOMEM; + + if (sg_alloc_table(st, 1, GFP)) { + kfree(st); + return -ENOMEM; + } + + sg = st->sgl; + st->nents = 1; + + page_size = get_largest_page_size(i915, obj->base.size); + GEM_BUG_ON(!page_size); + + sg->offset = 0; + sg->length = obj->base.size; + sg_dma_len(sg) = obj->base.size; + sg_dma_address(sg) = page_size; + + __i915_gem_object_set_pages(obj, st); + + return 0; +#undef GFP +} + +static void fake_free_huge_pages(struct drm_i915_gem_object *obj, + struct sg_table *pages) +{ + sg_free_table(pages); + kfree(pages); +} + +static void fake_put_huge_pages(struct drm_i915_gem_object *obj, + struct sg_table *pages) +{ + fake_free_huge_pages(obj, pages); + obj->mm.dirty = false; +} + +static const struct drm_i915_gem_object_ops fake_ops = { + .name = "fake-gem", + .flags = I915_GEM_OBJECT_IS_SHRINKABLE, + .get_pages = fake_get_huge_pages, + .put_pages = fake_put_huge_pages, +}; + +static const struct drm_i915_gem_object_ops fake_ops_single = { + .name = "fake-gem", + .flags = I915_GEM_OBJECT_IS_SHRINKABLE, + .get_pages = fake_get_huge_pages_single, + .put_pages = fake_put_huge_pages, +}; + +static struct drm_i915_gem_object * +fake_huge_pages_object(struct drm_i915_private *i915, u64 size, bool single) +{ + static struct lock_class_key lock_class; + struct drm_i915_gem_object *obj; + + GEM_BUG_ON(!size); + GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); + + if (size >> PAGE_SHIFT > UINT_MAX) + return ERR_PTR(-E2BIG); + + if (overflows_type(size, obj->base.size)) + return ERR_PTR(-E2BIG); + + obj = i915_gem_object_alloc(); + if (!obj) + return ERR_PTR(-ENOMEM); + + drm_gem_private_object_init(&i915->drm, &obj->base, size); + + if (single) + i915_gem_object_init(obj, &fake_ops_single, &lock_class, 0); + else + i915_gem_object_init(obj, &fake_ops, &lock_class, 0); + + i915_gem_object_set_volatile(obj); + + obj->write_domain = I915_GEM_DOMAIN_CPU; + obj->read_domains = I915_GEM_DOMAIN_CPU; + obj->pat_index = i915_gem_get_pat_index(i915, I915_CACHE_NONE); + + return obj; +} + +static int igt_check_page_sizes(struct i915_vma *vma) +{ + struct drm_i915_private *i915 = vma->vm->i915; + unsigned int supported = RUNTIME_INFO(i915)->page_sizes; + struct drm_i915_gem_object *obj = vma->obj; + int err; + + /* We have to wait for the async bind to complete before our asserts */ + err = i915_vma_sync(vma); + if (err) + return err; + + if (!HAS_PAGE_SIZES(i915, vma->page_sizes.sg)) { + pr_err("unsupported page_sizes.sg=%u, supported=%u\n", + vma->page_sizes.sg & ~supported, supported); + err = -EINVAL; + } + + if (!HAS_PAGE_SIZES(i915, vma->resource->page_sizes_gtt)) { + pr_err("unsupported page_sizes.gtt=%u, supported=%u\n", + vma->resource->page_sizes_gtt & ~supported, supported); + err = -EINVAL; + } + + if (vma->page_sizes.phys != obj->mm.page_sizes.phys) { + pr_err("vma->page_sizes.phys(%u) != obj->mm.page_sizes.phys(%u)\n", + vma->page_sizes.phys, obj->mm.page_sizes.phys); + err = -EINVAL; + } + + if (vma->page_sizes.sg != obj->mm.page_sizes.sg) { + pr_err("vma->page_sizes.sg(%u) != obj->mm.page_sizes.sg(%u)\n", + vma->page_sizes.sg, obj->mm.page_sizes.sg); + err = -EINVAL; + } + + /* + * The dma-api is like a box of chocolates when it comes to the + * alignment of dma addresses, however for LMEM we have total control + * and so can guarantee alignment, likewise when we allocate our blocks + * they should appear in descending order, and if we know that we align + * to the largest page size for the GTT address, we should be able to + * assert that if we see 2M physical pages then we should also get 2M + * GTT pages. If we don't then something might be wrong in our + * construction of the backing pages. + * + * Maintaining alignment is required to utilise huge pages in the ppGGT. + */ + if (i915_gem_object_is_lmem(obj) && + IS_ALIGNED(i915_vma_offset(vma), SZ_2M) && + vma->page_sizes.sg & SZ_2M && + vma->resource->page_sizes_gtt < SZ_2M) { + pr_err("gtt pages mismatch for LMEM, expected 2M GTT pages, sg(%u), gtt(%u)\n", + vma->page_sizes.sg, vma->resource->page_sizes_gtt); + err = -EINVAL; + } + + return err; +} + +static int igt_mock_exhaust_device_supported_pages(void *arg) +{ + struct i915_ppgtt *ppgtt = arg; + struct drm_i915_private *i915 = ppgtt->vm.i915; + unsigned int saved_mask = RUNTIME_INFO(i915)->page_sizes; + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int i, j, single; + int err; + + /* + * Sanity check creating objects with every valid page support + * combination for our mock device. + */ + + for (i = 1; i < BIT(ARRAY_SIZE(page_sizes)); i++) { + unsigned int combination = SZ_4K; /* Required for ppGTT */ + + for (j = 0; j < ARRAY_SIZE(page_sizes); j++) { + if (i & BIT(j)) + combination |= page_sizes[j]; + } + + RUNTIME_INFO(i915)->page_sizes = combination; + + for (single = 0; single <= 1; ++single) { + obj = fake_huge_pages_object(i915, combination, !!single); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_device; + } + + if (obj->base.size != combination) { + pr_err("obj->base.size=%zu, expected=%u\n", + obj->base.size, combination); + err = -EINVAL; + goto out_put; + } + + vma = i915_vma_instance(obj, &ppgtt->vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_put; + } + + err = i915_vma_pin(vma, 0, 0, PIN_USER); + if (err) + goto out_put; + + err = igt_check_page_sizes(vma); + + if (vma->page_sizes.sg != combination) { + pr_err("page_sizes.sg=%u, expected=%u\n", + vma->page_sizes.sg, combination); + err = -EINVAL; + } + + i915_vma_unpin(vma); + i915_gem_object_put(obj); + + if (err) + goto out_device; + } + } + + goto out_device; + +out_put: + i915_gem_object_put(obj); +out_device: + RUNTIME_INFO(i915)->page_sizes = saved_mask; + + return err; +} + +static int igt_mock_memory_region_huge_pages(void *arg) +{ + const unsigned int flags[] = { 0, I915_BO_ALLOC_CONTIGUOUS }; + struct i915_ppgtt *ppgtt = arg; + struct drm_i915_private *i915 = ppgtt->vm.i915; + unsigned long supported = RUNTIME_INFO(i915)->page_sizes; + struct intel_memory_region *mem; + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int bit; + int err = 0; + + mem = mock_region_create(i915, 0, SZ_2G, I915_GTT_PAGE_SIZE_4K, 0, 0); + if (IS_ERR(mem)) { + pr_err("%s failed to create memory region\n", __func__); + return PTR_ERR(mem); + } + + for_each_set_bit(bit, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) { + unsigned int page_size = BIT(bit); + resource_size_t phys; + int i; + + for (i = 0; i < ARRAY_SIZE(flags); ++i) { + obj = i915_gem_object_create_region(mem, + page_size, page_size, + flags[i]); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_region; + } + + vma = i915_vma_instance(obj, &ppgtt->vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_put; + } + + err = i915_vma_pin(vma, 0, 0, PIN_USER); + if (err) + goto out_put; + + err = igt_check_page_sizes(vma); + if (err) + goto out_unpin; + + phys = i915_gem_object_get_dma_address(obj, 0); + if (!IS_ALIGNED(phys, page_size)) { + pr_err("%s addr misaligned(%pa) page_size=%u\n", + __func__, &phys, page_size); + err = -EINVAL; + goto out_unpin; + } + + if (vma->resource->page_sizes_gtt != page_size) { + pr_err("%s page_sizes.gtt=%u, expected=%u\n", + __func__, vma->resource->page_sizes_gtt, + page_size); + err = -EINVAL; + goto out_unpin; + } + + i915_vma_unpin(vma); + __i915_gem_object_put_pages(obj); + i915_gem_object_put(obj); + } + } + + goto out_region; + +out_unpin: + i915_vma_unpin(vma); +out_put: + i915_gem_object_put(obj); +out_region: + intel_memory_region_destroy(mem); + return err; +} + +static int igt_mock_ppgtt_misaligned_dma(void *arg) +{ + struct i915_ppgtt *ppgtt = arg; + struct drm_i915_private *i915 = ppgtt->vm.i915; + unsigned long supported = RUNTIME_INFO(i915)->page_sizes; + struct drm_i915_gem_object *obj; + int bit; + int err; + + /* + * Sanity check dma misalignment for huge pages -- the dma addresses we + * insert into the paging structures need to always respect the page + * size alignment. + */ + + bit = ilog2(I915_GTT_PAGE_SIZE_64K); + + for_each_set_bit_from(bit, &supported, + ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) { + IGT_TIMEOUT(end_time); + unsigned int page_size = BIT(bit); + unsigned int flags = PIN_USER | PIN_OFFSET_FIXED; + unsigned int offset; + unsigned int size = + round_up(page_size, I915_GTT_PAGE_SIZE_2M) << 1; + struct i915_vma *vma; + + obj = fake_huge_pages_object(i915, size, true); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + if (obj->base.size != size) { + pr_err("obj->base.size=%zu, expected=%u\n", + obj->base.size, size); + err = -EINVAL; + goto out_put; + } + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) + goto out_put; + + /* Force the page size for this object */ + obj->mm.page_sizes.sg = page_size; + + vma = i915_vma_instance(obj, &ppgtt->vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_unpin; + } + + err = i915_vma_pin(vma, 0, 0, flags); + if (err) + goto out_unpin; + + + err = igt_check_page_sizes(vma); + + if (vma->resource->page_sizes_gtt != page_size) { + pr_err("page_sizes.gtt=%u, expected %u\n", + vma->resource->page_sizes_gtt, page_size); + err = -EINVAL; + } + + i915_vma_unpin(vma); + + if (err) + goto out_unpin; + + /* + * Try all the other valid offsets until the next + * boundary -- should always fall back to using 4K + * pages. + */ + for (offset = 4096; offset < page_size; offset += 4096) { + err = i915_vma_unbind_unlocked(vma); + if (err) + goto out_unpin; + + err = i915_vma_pin(vma, 0, 0, flags | offset); + if (err) + goto out_unpin; + + err = igt_check_page_sizes(vma); + + if (vma->resource->page_sizes_gtt != I915_GTT_PAGE_SIZE_4K) { + pr_err("page_sizes.gtt=%u, expected %llu\n", + vma->resource->page_sizes_gtt, + I915_GTT_PAGE_SIZE_4K); + err = -EINVAL; + } + + i915_vma_unpin(vma); + + if (err) + goto out_unpin; + + if (igt_timeout(end_time, + "%s timed out at offset %x with page-size %x\n", + __func__, offset, page_size)) + break; + } + + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + } + + return 0; + +out_unpin: + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + i915_gem_object_unlock(obj); +out_put: + i915_gem_object_put(obj); + + return err; +} + +static void close_object_list(struct list_head *objects) +{ + struct drm_i915_gem_object *obj, *on; + + list_for_each_entry_safe(obj, on, objects, st_link) { + list_del(&obj->st_link); + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + } +} + +static int igt_ppgtt_huge_fill(void *arg) +{ + struct drm_i915_private *i915 = arg; + unsigned int supported = RUNTIME_INFO(i915)->page_sizes; + bool has_pte64 = GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50); + struct i915_address_space *vm; + struct i915_gem_context *ctx; + unsigned long max_pages; + unsigned long page_num; + struct file *file; + bool single = false; + LIST_HEAD(objects); + IGT_TIMEOUT(end_time); + int err = -ENODEV; + + if (supported == I915_GTT_PAGE_SIZE_4K) + return 0; + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + vm = i915_gem_context_get_eb_vm(ctx); + max_pages = vm->total >> PAGE_SHIFT; + + for_each_prime_number_from(page_num, 1, max_pages) { + struct drm_i915_gem_object *obj; + u64 size = page_num << PAGE_SHIFT; + struct i915_vma *vma; + unsigned int expected_gtt = 0; + int i; + + obj = fake_huge_pages_object(i915, size, single); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + break; + } + + if (obj->base.size != size) { + pr_err("obj->base.size=%zd, expected=%llu\n", + obj->base.size, size); + i915_gem_object_put(obj); + err = -EINVAL; + break; + } + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) { + i915_gem_object_put(obj); + break; + } + + list_add(&obj->st_link, &objects); + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + break; + } + + /* vma start must be aligned to BIT(21) to allow 2M PTEs */ + err = i915_vma_pin(vma, 0, BIT(21), PIN_USER); + if (err) + break; + + err = igt_check_page_sizes(vma); + if (err) { + i915_vma_unpin(vma); + break; + } + + /* + * Figure out the expected gtt page size knowing that we go from + * largest to smallest page size sg chunks, and that we align to + * the largest page size. + */ + for (i = 0; i < ARRAY_SIZE(page_sizes); ++i) { + unsigned int page_size = page_sizes[i]; + + if (HAS_PAGE_SIZES(i915, page_size) && + size >= page_size) { + expected_gtt |= page_size; + size &= page_size-1; + } + } + + GEM_BUG_ON(!expected_gtt); + GEM_BUG_ON(size); + + if (!has_pte64 && (obj->base.size < I915_GTT_PAGE_SIZE_2M || + expected_gtt & I915_GTT_PAGE_SIZE_2M)) + expected_gtt &= ~I915_GTT_PAGE_SIZE_64K; + + i915_vma_unpin(vma); + + if (!has_pte64 && vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) { + if (!IS_ALIGNED(vma->node.start, + I915_GTT_PAGE_SIZE_2M)) { + pr_err("node.start(%llx) not aligned to 2M\n", + vma->node.start); + err = -EINVAL; + break; + } + + if (!IS_ALIGNED(vma->node.size, + I915_GTT_PAGE_SIZE_2M)) { + pr_err("node.size(%llx) not aligned to 2M\n", + vma->node.size); + err = -EINVAL; + break; + } + } + + if (vma->resource->page_sizes_gtt != expected_gtt) { + pr_err("gtt=%#x, expected=%#x, size=0x%zx, single=%s\n", + vma->resource->page_sizes_gtt, expected_gtt, + obj->base.size, str_yes_no(!!single)); + err = -EINVAL; + break; + } + + if (igt_timeout(end_time, + "%s timed out at size %zd\n", + __func__, obj->base.size)) + break; + + single = !single; + } + + close_object_list(&objects); + + if (err == -ENOMEM || err == -ENOSPC) + err = 0; + + i915_vm_put(vm); +out: + fput(file); + return err; +} + +static int igt_ppgtt_64K(void *arg) +{ + struct drm_i915_private *i915 = arg; + bool has_pte64 = GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50); + struct drm_i915_gem_object *obj; + struct i915_address_space *vm; + struct i915_gem_context *ctx; + struct file *file; + const struct object_info { + unsigned int size; + unsigned int gtt; + unsigned int offset; + } objects[] = { + /* Cases with forced padding/alignment */ + { + .size = SZ_64K, + .gtt = I915_GTT_PAGE_SIZE_64K, + .offset = 0, + }, + { + .size = SZ_64K + SZ_4K, + .gtt = I915_GTT_PAGE_SIZE_4K, + .offset = 0, + }, + { + .size = SZ_64K - SZ_4K, + .gtt = I915_GTT_PAGE_SIZE_4K, + .offset = 0, + }, + { + .size = SZ_2M, + .gtt = I915_GTT_PAGE_SIZE_64K, + .offset = 0, + }, + { + .size = SZ_2M - SZ_4K, + .gtt = I915_GTT_PAGE_SIZE_4K, + .offset = 0, + }, + { + .size = SZ_2M + SZ_4K, + .gtt = I915_GTT_PAGE_SIZE_64K | I915_GTT_PAGE_SIZE_4K, + .offset = 0, + }, + { + .size = SZ_2M + SZ_64K, + .gtt = I915_GTT_PAGE_SIZE_64K, + .offset = 0, + }, + { + .size = SZ_2M - SZ_64K, + .gtt = I915_GTT_PAGE_SIZE_64K, + .offset = 0, + }, + /* Try without any forced padding/alignment */ + { + .size = SZ_64K, + .offset = SZ_2M, + .gtt = I915_GTT_PAGE_SIZE_4K, + }, + { + .size = SZ_128K, + .offset = SZ_2M - SZ_64K, + .gtt = I915_GTT_PAGE_SIZE_4K, + }, + }; + struct i915_vma *vma; + int i, single; + int err; + + /* + * Sanity check some of the trickiness with 64K pages -- either we can + * safely mark the whole page-table(2M block) as 64K, or we have to + * always fallback to 4K. + */ + + if (!HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_64K)) + return 0; + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + vm = i915_gem_context_get_eb_vm(ctx); + + for (i = 0; i < ARRAY_SIZE(objects); ++i) { + unsigned int size = objects[i].size; + unsigned int expected_gtt = objects[i].gtt; + unsigned int offset = objects[i].offset; + unsigned int flags = PIN_USER; + + /* + * For modern GTT models, the requirements for marking a page-table + * as 64K have been relaxed. Account for this. + */ + if (has_pte64) { + expected_gtt = 0; + if (size >= SZ_64K) + expected_gtt |= I915_GTT_PAGE_SIZE_64K; + if (size & (SZ_64K - 1)) + expected_gtt |= I915_GTT_PAGE_SIZE_4K; + } + + for (single = 0; single <= 1; single++) { + obj = fake_huge_pages_object(i915, size, !!single); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_vm; + } + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) + goto out_object_put; + + /* + * Disable 2M pages -- We only want to use 64K/4K pages + * for this test. + */ + obj->mm.page_sizes.sg &= ~I915_GTT_PAGE_SIZE_2M; + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_object_unpin; + } + + if (offset) + flags |= PIN_OFFSET_FIXED | offset; + + err = i915_vma_pin(vma, 0, 0, flags); + if (err) + goto out_object_unpin; + + err = igt_check_page_sizes(vma); + if (err) + goto out_vma_unpin; + + if (!has_pte64 && !offset && + vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) { + if (!IS_ALIGNED(vma->node.start, + I915_GTT_PAGE_SIZE_2M)) { + pr_err("node.start(%llx) not aligned to 2M\n", + vma->node.start); + err = -EINVAL; + goto out_vma_unpin; + } + + if (!IS_ALIGNED(vma->node.size, + I915_GTT_PAGE_SIZE_2M)) { + pr_err("node.size(%llx) not aligned to 2M\n", + vma->node.size); + err = -EINVAL; + goto out_vma_unpin; + } + } + + if (vma->resource->page_sizes_gtt != expected_gtt) { + pr_err("gtt=%#x, expected=%#x, i=%d, single=%s offset=%#x size=%#x\n", + vma->resource->page_sizes_gtt, + expected_gtt, i, str_yes_no(!!single), + offset, size); + err = -EINVAL; + goto out_vma_unpin; + } + + i915_vma_unpin(vma); + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + + i915_gem_drain_freed_objects(i915); + } + } + + goto out_vm; + +out_vma_unpin: + i915_vma_unpin(vma); +out_object_unpin: + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + i915_gem_object_unlock(obj); +out_object_put: + i915_gem_object_put(obj); +out_vm: + i915_vm_put(vm); +out: + fput(file); + return err; +} + +static int gpu_write(struct intel_context *ce, + struct i915_vma *vma, + u32 dw, + u32 val) +{ + int err; + + i915_gem_object_lock(vma->obj, NULL); + err = i915_gem_object_set_to_gtt_domain(vma->obj, true); + i915_gem_object_unlock(vma->obj); + if (err) + return err; + + return igt_gpu_fill_dw(ce, vma, dw * sizeof(u32), + vma->size >> PAGE_SHIFT, val); +} + +static int +__cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val) +{ + unsigned int needs_flush; + unsigned long n; + int err; + + i915_gem_object_lock(obj, NULL); + err = i915_gem_object_prepare_read(obj, &needs_flush); + if (err) + goto err_unlock; + + for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) { + u32 *ptr = kmap_atomic(i915_gem_object_get_page(obj, n)); + + if (needs_flush & CLFLUSH_BEFORE) + drm_clflush_virt_range(ptr, PAGE_SIZE); + + if (ptr[dword] != val) { + pr_err("n=%lu ptr[%u]=%u, val=%u\n", + n, dword, ptr[dword], val); + kunmap_atomic(ptr); + err = -EINVAL; + break; + } + + kunmap_atomic(ptr); + } + + i915_gem_object_finish_access(obj); +err_unlock: + i915_gem_object_unlock(obj); + + return err; +} + +static int __cpu_check_vmap(struct drm_i915_gem_object *obj, u32 dword, u32 val) +{ + unsigned long n = obj->base.size >> PAGE_SHIFT; + u32 *ptr; + int err; + + err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT); + if (err) + return err; + + ptr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC); + if (IS_ERR(ptr)) + return PTR_ERR(ptr); + + ptr += dword; + while (n--) { + if (*ptr != val) { + pr_err("base[%u]=%08x, val=%08x\n", + dword, *ptr, val); + err = -EINVAL; + break; + } + + ptr += PAGE_SIZE / sizeof(*ptr); + } + + i915_gem_object_unpin_map(obj); + return err; +} + +static int cpu_check(struct drm_i915_gem_object *obj, u32 dword, u32 val) +{ + if (i915_gem_object_has_struct_page(obj)) + return __cpu_check_shmem(obj, dword, val); + else + return __cpu_check_vmap(obj, dword, val); +} + +static int __igt_write_huge(struct intel_context *ce, + struct drm_i915_gem_object *obj, + u64 size, u64 offset, + u32 dword, u32 val) +{ + unsigned int flags = PIN_USER | PIN_OFFSET_FIXED; + struct i915_vma *vma; + int err; + + vma = i915_vma_instance(obj, ce->vm, NULL); + if (IS_ERR(vma)) + return PTR_ERR(vma); + + err = i915_vma_pin(vma, size, 0, flags | offset); + if (err) { + /* + * The ggtt may have some pages reserved so + * refrain from erroring out. + */ + if (err == -ENOSPC && i915_is_ggtt(ce->vm)) + err = 0; + + return err; + } + + err = igt_check_page_sizes(vma); + if (err) + goto out_vma_unpin; + + err = gpu_write(ce, vma, dword, val); + if (err) { + pr_err("gpu-write failed at offset=%llx\n", offset); + goto out_vma_unpin; + } + + err = cpu_check(obj, dword, val); + if (err) { + pr_err("cpu-check failed at offset=%llx\n", offset); + goto out_vma_unpin; + } + +out_vma_unpin: + i915_vma_unpin(vma); + return err; +} + +static int igt_write_huge(struct drm_i915_private *i915, + struct drm_i915_gem_object *obj) +{ + struct i915_gem_engines *engines; + struct i915_gem_engines_iter it; + struct intel_context *ce; + I915_RND_STATE(prng); + IGT_TIMEOUT(end_time); + unsigned int max_page_size; + unsigned int count; + struct i915_gem_context *ctx; + struct file *file; + u64 max; + u64 num; + u64 size; + int *order; + int i, n; + int err = 0; + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + + GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); + + size = obj->base.size; + if (obj->mm.page_sizes.sg & I915_GTT_PAGE_SIZE_64K && + !HAS_64K_PAGES(i915)) + size = round_up(size, I915_GTT_PAGE_SIZE_2M); + + n = 0; + count = 0; + max = U64_MAX; + for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { + count++; + if (!intel_engine_can_store_dword(ce->engine)) + continue; + + max = min(max, ce->vm->total); + n++; + } + i915_gem_context_unlock_engines(ctx); + if (!n) + goto out; + + /* + * To keep things interesting when alternating between engines in our + * randomized order, lets also make feeding to the same engine a few + * times in succession a possibility by enlarging the permutation array. + */ + order = i915_random_order(count * count, &prng); + if (!order) { + err = -ENOMEM; + goto out; + } + + max_page_size = rounddown_pow_of_two(obj->mm.page_sizes.sg); + max = div_u64(max - size, max_page_size); + + /* + * Try various offsets in an ascending/descending fashion until we + * timeout -- we want to avoid issues hidden by effectively always using + * offset = 0. + */ + i = 0; + engines = i915_gem_context_lock_engines(ctx); + for_each_prime_number_from(num, 0, max) { + u64 offset_low = num * max_page_size; + u64 offset_high = (max - num) * max_page_size; + u32 dword = offset_in_page(num) / 4; + struct intel_context *ce; + + ce = engines->engines[order[i] % engines->num_engines]; + i = (i + 1) % (count * count); + if (!ce || !intel_engine_can_store_dword(ce->engine)) + continue; + + /* + * In order to utilize 64K pages we need to both pad the vma + * size and ensure the vma offset is at the start of the pt + * boundary, however to improve coverage we opt for testing both + * aligned and unaligned offsets. + * + * With PS64 this is no longer the case, but to ensure we + * sometimes get the compact layout for smaller objects, apply + * the round_up anyway. + */ + if (obj->mm.page_sizes.sg & I915_GTT_PAGE_SIZE_64K) + offset_low = round_down(offset_low, + I915_GTT_PAGE_SIZE_2M); + + err = __igt_write_huge(ce, obj, size, offset_low, + dword, num + 1); + if (err) + break; + + err = __igt_write_huge(ce, obj, size, offset_high, + dword, num + 1); + if (err) + break; + + if (igt_timeout(end_time, + "%s timed out on %s, offset_low=%llx offset_high=%llx, max_page_size=%x\n", + __func__, ce->engine->name, offset_low, offset_high, + max_page_size)) + break; + } + i915_gem_context_unlock_engines(ctx); + + kfree(order); + +out: + fput(file); + return err; +} + +typedef struct drm_i915_gem_object * +(*igt_create_fn)(struct drm_i915_private *i915, u32 size, u32 flags); + +static inline bool igt_can_allocate_thp(struct drm_i915_private *i915) +{ + return i915->mm.gemfs && has_transparent_hugepage(); +} + +static struct drm_i915_gem_object * +igt_create_shmem(struct drm_i915_private *i915, u32 size, u32 flags) +{ + if (!igt_can_allocate_thp(i915)) { + pr_info("%s missing THP support, skipping\n", __func__); + return ERR_PTR(-ENODEV); + } + + return i915_gem_object_create_shmem(i915, size); +} + +static struct drm_i915_gem_object * +igt_create_internal(struct drm_i915_private *i915, u32 size, u32 flags) +{ + return i915_gem_object_create_internal(i915, size); +} + +static struct drm_i915_gem_object * +igt_create_system(struct drm_i915_private *i915, u32 size, u32 flags) +{ + return huge_pages_object(i915, size, size); +} + +static struct drm_i915_gem_object * +igt_create_local(struct drm_i915_private *i915, u32 size, u32 flags) +{ + return i915_gem_object_create_lmem(i915, size, flags); +} + +static u32 igt_random_size(struct rnd_state *prng, + u32 min_page_size, + u32 max_page_size) +{ + u64 mask; + u32 size; + + GEM_BUG_ON(!is_power_of_2(min_page_size)); + GEM_BUG_ON(!is_power_of_2(max_page_size)); + GEM_BUG_ON(min_page_size < PAGE_SIZE); + GEM_BUG_ON(min_page_size > max_page_size); + + mask = ((max_page_size << 1ULL) - 1) & PAGE_MASK; + size = prandom_u32_state(prng) & mask; + if (size < min_page_size) + size |= min_page_size; + + return size; +} + +static int igt_ppgtt_smoke_huge(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + I915_RND_STATE(prng); + struct { + igt_create_fn fn; + u32 min; + u32 max; + } backends[] = { + { igt_create_internal, SZ_64K, SZ_2M, }, + { igt_create_shmem, SZ_64K, SZ_32M, }, + { igt_create_local, SZ_64K, SZ_1G, }, + }; + int err; + int i; + + /* + * Sanity check that the HW uses huge pages correctly through our + * various backends -- ensure that our writes land in the right place. + */ + + for (i = 0; i < ARRAY_SIZE(backends); ++i) { + u32 min = backends[i].min; + u32 max = backends[i].max; + u32 size = max; + +try_again: + size = igt_random_size(&prng, min, rounddown_pow_of_two(size)); + + obj = backends[i].fn(i915, size, 0); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + if (err == -E2BIG) { + size >>= 1; + goto try_again; + } else if (err == -ENODEV) { + err = 0; + continue; + } + + return err; + } + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) { + if (err == -ENXIO || err == -E2BIG || err == -ENOMEM) { + i915_gem_object_put(obj); + size >>= 1; + goto try_again; + } + goto out_put; + } + + if (obj->mm.page_sizes.phys < min) { + pr_info("%s unable to allocate huge-page(s) with size=%u, i=%d\n", + __func__, size, i); + err = -ENOMEM; + goto out_unpin; + } + + err = igt_write_huge(i915, obj); + if (err) { + pr_err("%s write-huge failed with size=%u, i=%d\n", + __func__, size, i); + } +out_unpin: + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); + i915_gem_object_unlock(obj); +out_put: + i915_gem_object_put(obj); + + if (err == -ENOMEM || err == -ENXIO) + err = 0; + + if (err) + break; + + cond_resched(); + } + + return err; +} + +static int igt_ppgtt_sanity_check(void *arg) +{ + struct drm_i915_private *i915 = arg; + unsigned int supported = RUNTIME_INFO(i915)->page_sizes; + struct { + igt_create_fn fn; + unsigned int flags; + } backends[] = { + { igt_create_system, 0, }, + { igt_create_local, 0, }, + { igt_create_local, I915_BO_ALLOC_CONTIGUOUS, }, + }; + struct { + u32 size; + u32 pages; + } combos[] = { + { SZ_64K, SZ_64K }, + { SZ_2M, SZ_2M }, + { SZ_2M, SZ_64K }, + { SZ_2M - SZ_64K, SZ_64K }, + { SZ_2M - SZ_4K, SZ_64K | SZ_4K }, + { SZ_2M + SZ_4K, SZ_64K | SZ_4K }, + { SZ_2M + SZ_4K, SZ_2M | SZ_4K }, + { SZ_2M + SZ_64K, SZ_2M | SZ_64K }, + { SZ_2M + SZ_64K, SZ_64K }, + }; + int i, j; + int err; + + if (supported == I915_GTT_PAGE_SIZE_4K) + return 0; + + /* + * Sanity check that the HW behaves with a limited set of combinations. + * We already have a bunch of randomised testing, which should give us + * a decent amount of variation between runs, however we should keep + * this to limit the chances of introducing a temporary regression, by + * testing the most obvious cases that might make something blow up. + */ + + for (i = 0; i < ARRAY_SIZE(backends); ++i) { + for (j = 0; j < ARRAY_SIZE(combos); ++j) { + struct drm_i915_gem_object *obj; + u32 size = combos[j].size; + u32 pages = combos[j].pages; + + obj = backends[i].fn(i915, size, backends[i].flags); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + if (err == -ENODEV) { + pr_info("Device lacks local memory, skipping\n"); + err = 0; + break; + } + + return err; + } + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) { + i915_gem_object_put(obj); + goto out; + } + + GEM_BUG_ON(pages > obj->base.size); + pages = pages & supported; + + if (pages) + obj->mm.page_sizes.sg = pages; + + err = igt_write_huge(i915, obj); + + i915_gem_object_lock(obj, NULL); + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + + if (err) { + pr_err("%s write-huge failed with size=%u pages=%u i=%d, j=%d\n", + __func__, size, pages, i, j); + goto out; + } + } + + cond_resched(); + } + +out: + if (err == -ENOMEM) + err = 0; + + return err; +} + +static int igt_ppgtt_compact(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + int err; + + /* + * Simple test to catch issues with compact 64K pages -- since the pt is + * compacted to 256B that gives us 32 entries per pt, however since the + * backing page for the pt is 4K, any extra entries we might incorrectly + * write out should be ignored by the HW. If ever hit such a case this + * test should catch it since some of our writes would land in scratch. + */ + + if (!HAS_64K_PAGES(i915)) { + pr_info("device lacks compact 64K page support, skipping\n"); + return 0; + } + + if (!HAS_LMEM(i915)) { + pr_info("device lacks LMEM support, skipping\n"); + return 0; + } + + /* We want the range to cover multiple page-table boundaries. */ + obj = i915_gem_object_create_lmem(i915, SZ_4M, 0); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) + goto out_put; + + if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) { + pr_info("LMEM compact unable to allocate huge-page(s)\n"); + goto out_unpin; + } + + /* + * Disable 2M GTT pages by forcing the page-size to 64K for the GTT + * insertion. + */ + obj->mm.page_sizes.sg = I915_GTT_PAGE_SIZE_64K; + + err = igt_write_huge(i915, obj); + if (err) + pr_err("LMEM compact write-huge failed\n"); + +out_unpin: + i915_gem_object_unpin_pages(obj); +out_put: + i915_gem_object_put(obj); + + if (err == -ENOMEM) + err = 0; + + return err; +} + +static int igt_ppgtt_mixed(void *arg) +{ + struct drm_i915_private *i915 = arg; + const unsigned long flags = PIN_OFFSET_FIXED | PIN_USER; + struct drm_i915_gem_object *obj, *on; + struct i915_gem_engines *engines; + struct i915_gem_engines_iter it; + struct i915_address_space *vm; + struct i915_gem_context *ctx; + struct intel_context *ce; + struct file *file; + I915_RND_STATE(prng); + LIST_HEAD(objects); + struct intel_memory_region *mr; + struct i915_vma *vma; + unsigned int count; + u32 i, addr; + int *order; + int n, err; + + /* + * Sanity check mixing 4K and 64K pages within the same page-table via + * the new PS64 TLB hint. + */ + + if (!HAS_64K_PAGES(i915)) { + pr_info("device lacks PS64, skipping\n"); + return 0; + } + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + vm = i915_gem_context_get_eb_vm(ctx); + + i = 0; + addr = 0; + do { + u32 sz; + + sz = i915_prandom_u32_max_state(SZ_4M, &prng); + sz = max_t(u32, sz, SZ_4K); + + mr = i915->mm.regions[INTEL_REGION_LMEM_0]; + if (i & 1) + mr = i915->mm.regions[INTEL_REGION_SMEM]; + + obj = i915_gem_object_create_region(mr, sz, 0, 0); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_vm; + } + + list_add_tail(&obj->st_link, &objects); + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto err_put; + } + + addr = round_up(addr, mr->min_page_size); + err = i915_vma_pin(vma, 0, 0, addr | flags); + if (err) + goto err_put; + + if (mr->type == INTEL_MEMORY_LOCAL && + (vma->resource->page_sizes_gtt & I915_GTT_PAGE_SIZE_4K)) { + err = -EINVAL; + goto err_put; + } + + addr += obj->base.size; + i++; + } while (addr <= SZ_16M); + + n = 0; + count = 0; + for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { + count++; + if (!intel_engine_can_store_dword(ce->engine)) + continue; + + n++; + } + i915_gem_context_unlock_engines(ctx); + if (!n) + goto err_put; + + order = i915_random_order(count * count, &prng); + if (!order) { + err = -ENOMEM; + goto err_put; + } + + i = 0; + addr = 0; + engines = i915_gem_context_lock_engines(ctx); + list_for_each_entry(obj, &objects, st_link) { + u32 rnd = i915_prandom_u32_max_state(UINT_MAX, &prng); + + addr = round_up(addr, obj->mm.region->min_page_size); + + ce = engines->engines[order[i] % engines->num_engines]; + i = (i + 1) % (count * count); + if (!ce || !intel_engine_can_store_dword(ce->engine)) + continue; + + err = __igt_write_huge(ce, obj, obj->base.size, addr, 0, rnd); + if (err) + break; + + err = __igt_write_huge(ce, obj, obj->base.size, addr, + offset_in_page(rnd) / sizeof(u32), rnd + 1); + if (err) + break; + + err = __igt_write_huge(ce, obj, obj->base.size, addr, + (PAGE_SIZE / sizeof(u32)) - 1, + rnd + 2); + if (err) + break; + + addr += obj->base.size; + + cond_resched(); + } + + i915_gem_context_unlock_engines(ctx); + kfree(order); +err_put: + list_for_each_entry_safe(obj, on, &objects, st_link) { + list_del(&obj->st_link); + i915_gem_object_put(obj); + } +out_vm: + i915_vm_put(vm); +out: + fput(file); + return err; +} + +static int igt_tmpfs_fallback(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct i915_address_space *vm; + struct i915_gem_context *ctx; + struct vfsmount *gemfs = i915->mm.gemfs; + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + struct file *file; + u32 *vaddr; + int err = 0; + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + vm = i915_gem_context_get_eb_vm(ctx); + + /* + * Make sure that we don't burst into a ball of flames upon falling back + * to tmpfs, which we rely on if on the off-chance we encouter a failure + * when setting up gemfs. + */ + + i915->mm.gemfs = NULL; + + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_restore; + } + + vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB); + if (IS_ERR(vaddr)) { + err = PTR_ERR(vaddr); + goto out_put; + } + *vaddr = 0xdeadbeaf; + + __i915_gem_object_flush_map(obj, 0, 64); + i915_gem_object_unpin_map(obj); + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_put; + } + + err = i915_vma_pin(vma, 0, 0, PIN_USER); + if (err) + goto out_put; + + err = igt_check_page_sizes(vma); + + i915_vma_unpin(vma); +out_put: + i915_gem_object_put(obj); +out_restore: + i915->mm.gemfs = gemfs; + + i915_vm_put(vm); +out: + fput(file); + return err; +} + +static int igt_shrink_thp(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct i915_address_space *vm; + struct i915_gem_context *ctx; + struct drm_i915_gem_object *obj; + struct i915_gem_engines_iter it; + struct intel_context *ce; + struct i915_vma *vma; + struct file *file; + unsigned int flags = PIN_USER; + unsigned int n; + intel_wakeref_t wf; + bool should_swap; + int err; + + if (!igt_can_allocate_thp(i915)) { + pr_info("missing THP support, skipping\n"); + return 0; + } + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = hugepage_ctx(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out; + } + vm = i915_gem_context_get_eb_vm(ctx); + + /* + * Sanity check shrinking huge-paged object -- make sure nothing blows + * up. + */ + + obj = i915_gem_object_create_shmem(i915, SZ_2M); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto out_vm; + } + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_put; + } + + wf = intel_runtime_pm_get(&i915->runtime_pm); /* active shrink */ + + err = i915_vma_pin(vma, 0, 0, flags); + if (err) + goto out_wf; + + if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_2M) { + pr_info("failed to allocate THP, finishing test early\n"); + goto out_unpin; + } + + err = igt_check_page_sizes(vma); + if (err) + goto out_unpin; + + n = 0; + + for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { + if (!intel_engine_can_store_dword(ce->engine)) + continue; + + err = gpu_write(ce, vma, n++, 0xdeadbeaf); + if (err) + break; + } + i915_gem_context_unlock_engines(ctx); + /* + * Nuke everything *before* we unpin the pages so we can be reasonably + * sure that when later checking get_nr_swap_pages() that some random + * leftover object doesn't steal the remaining swap space. + */ + i915_gem_shrink(NULL, i915, -1UL, NULL, + I915_SHRINK_BOUND | + I915_SHRINK_UNBOUND | + I915_SHRINK_ACTIVE); + i915_vma_unpin(vma); + if (err) + goto out_wf; + + /* + * Now that the pages are *unpinned* shrinking should invoke + * shmem to truncate our pages, if we have available swap. + */ + should_swap = get_nr_swap_pages() > 0; + i915_gem_shrink(NULL, i915, -1UL, NULL, + I915_SHRINK_BOUND | + I915_SHRINK_UNBOUND | + I915_SHRINK_ACTIVE | + I915_SHRINK_WRITEBACK); + if (should_swap == i915_gem_object_has_pages(obj)) { + pr_err("unexpected pages mismatch, should_swap=%s\n", + str_yes_no(should_swap)); + err = -EINVAL; + goto out_wf; + } + + if (should_swap == (obj->mm.page_sizes.sg || obj->mm.page_sizes.phys)) { + pr_err("unexpected residual page-size bits, should_swap=%s\n", + str_yes_no(should_swap)); + err = -EINVAL; + goto out_wf; + } + + err = i915_vma_pin(vma, 0, 0, flags); + if (err) + goto out_wf; + + while (n--) { + err = cpu_check(obj, n, 0xdeadbeaf); + if (err) + break; + } + +out_unpin: + i915_vma_unpin(vma); +out_wf: + intel_runtime_pm_put(&i915->runtime_pm, wf); +out_put: + i915_gem_object_put(obj); +out_vm: + i915_vm_put(vm); +out: + fput(file); + return err; +} + +int i915_gem_huge_page_mock_selftests(void) +{ + static const struct i915_subtest tests[] = { + SUBTEST(igt_mock_exhaust_device_supported_pages), + SUBTEST(igt_mock_memory_region_huge_pages), + SUBTEST(igt_mock_ppgtt_misaligned_dma), + }; + struct drm_i915_private *dev_priv; + struct i915_ppgtt *ppgtt; + int err; + + dev_priv = mock_gem_device(); + if (!dev_priv) + return -ENOMEM; + + /* Pretend to be a device which supports the 48b PPGTT */ + RUNTIME_INFO(dev_priv)->ppgtt_type = INTEL_PPGTT_FULL; + RUNTIME_INFO(dev_priv)->ppgtt_size = 48; + + ppgtt = i915_ppgtt_create(to_gt(dev_priv), 0); + if (IS_ERR(ppgtt)) { + err = PTR_ERR(ppgtt); + goto out_unlock; + } + + if (!i915_vm_is_4lvl(&ppgtt->vm)) { + pr_err("failed to create 48b PPGTT\n"); + err = -EINVAL; + goto out_put; + } + + /* If we were ever hit this then it's time to mock the 64K scratch */ + if (!i915_vm_has_scratch_64K(&ppgtt->vm)) { + pr_err("PPGTT missing 64K scratch page\n"); + err = -EINVAL; + goto out_put; + } + + err = i915_subtests(tests, ppgtt); + +out_put: + i915_vm_put(&ppgtt->vm); +out_unlock: + mock_destroy_device(dev_priv); + return err; +} + +int i915_gem_huge_page_live_selftests(struct drm_i915_private *i915) +{ + static const struct i915_subtest tests[] = { + SUBTEST(igt_shrink_thp), + SUBTEST(igt_tmpfs_fallback), + SUBTEST(igt_ppgtt_smoke_huge), + SUBTEST(igt_ppgtt_sanity_check), + SUBTEST(igt_ppgtt_compact), + SUBTEST(igt_ppgtt_mixed), + SUBTEST(igt_ppgtt_huge_fill), + SUBTEST(igt_ppgtt_64K), + }; + + if (!HAS_PPGTT(i915)) { + pr_info("PPGTT not supported, skipping live-selftests\n"); + return 0; + } + + if (intel_gt_is_wedged(to_gt(i915))) + return 0; + + return i915_live_subtests(tests, i915); +} |