From patchwork Fri Jun 3 09:38:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gwan-gyeong Mun X-Patchwork-Id: 12868872 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 50072C43334 for ; Fri, 3 Jun 2022 09:39:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BA9CF10ED97; Fri, 3 Jun 2022 09:39:50 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4018110ED97 for ; Fri, 3 Jun 2022 09:39:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1654249189; x=1685785189; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+nQIEZhXZvt6tqOit0s8YxBH46obKU7CPEhwT2/GmVM=; b=ISZ6DbHiVFZj8CA+Qask2+zV9ohzB1jn+SfsJ4m7hekJTggtht9qJsZU up//rA1E9wOwUeuvrZS46+Q1fY7Z7RHOZIFt067zhS417lBEB2NGd+uvM iWEzNMdZd33/zPgmojIpw9yUsXHvQ2XudbtbZOXt/BgGuKCVXfuRdIZde ha9vlkzijvlP79TipwEteFMeJZTMAsgrtzZXBZGZ3rTLEo8Xe2uMizhFP zwovuVvepIy7ZD8qfFPwBIen4Xigtbhi/v+77/tTmJ3aPldG0QWhWszhb YMCBFvxc2saLC5H56BOXzZ5r5+EC4zGnTplaK6lzTHA00i6tOevwZ4PVO w==; X-IronPort-AV: E=McAfee;i="6400,9594,10366"; a="276284595" X-IronPort-AV: E=Sophos;i="5.91,274,1647327600"; d="scan'208";a="276284595" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jun 2022 02:39:48 -0700 X-IronPort-AV: E=Sophos;i="5.91,274,1647327600"; d="scan'208";a="757414572" Received: from swoon-mobl1.gar.corp.intel.com (HELO hades.gar.corp.intel.com) ([10.213.34.85]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jun 2022 02:39:46 -0700 From: Gwan-gyeong Mun To: intel-gfx@lists.freedesktop.org Date: Fri, 3 Jun 2022 18:38:25 +0900 Message-Id: <20220603093830.1529520-2-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220603093830.1529520-1-gwan-gyeong.mun@intel.com> References: <20220603093830.1529520-1-gwan-gyeong.mun@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 1/6] drm/i915/gem: Typecheck page lookups X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thomas.hellstrom@linux.intel.com, matthew.auld@intel.com, chris@chris-wilson.co.uk Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Chris Wilson We need to check that we avoid integer overflows when looking up a page, and so fix all the instances where we have mistakenly used a plain integer instead of a more suitable long. Be pedantic and add integer typechecking to the lookup so that we can be sure that we are safe. And it also uses pgoff_t as our page lookups must remain compatible with the page cache, pgoff_t is currently exactly unsigned long. Signed-off-by: Chris Wilson Signed-off-by: Gwan-gyeong Mun Cc: Tvrtko Ursulin Cc: Matthew Auld Cc: Thomas Hellström --- drivers/gpu/drm/i915/gem/i915_gem_object.c | 7 +- drivers/gpu/drm/i915/gem/i915_gem_object.h | 67 ++++++++++++++----- drivers/gpu/drm/i915/gem/i915_gem_pages.c | 25 ++++--- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 +- .../drm/i915/gem/selftests/i915_gem_context.c | 12 ++-- .../drm/i915/gem/selftests/i915_gem_mman.c | 8 +-- .../drm/i915/gem/selftests/i915_gem_object.c | 8 +-- drivers/gpu/drm/i915/i915_gem.c | 18 +++-- drivers/gpu/drm/i915/i915_utils.h | 6 ++ drivers/gpu/drm/i915/i915_vma.c | 8 +-- 10 files changed, 106 insertions(+), 55 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 06b1b188ce5a..a5af74f78d57 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -421,10 +421,11 @@ void __i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj, static void i915_gem_object_read_from_page_kmap(struct drm_i915_gem_object *obj, u64 offset, void *dst, int size) { + pgoff_t idx = offset >> PAGE_SHIFT; void *src_map; void *src_ptr; - src_map = kmap_atomic(i915_gem_object_get_page(obj, offset >> PAGE_SHIFT)); + src_map = kmap_atomic(i915_gem_object_get_page(obj, idx)); src_ptr = src_map + offset_in_page(offset); if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ)) @@ -437,9 +438,10 @@ i915_gem_object_read_from_page_kmap(struct drm_i915_gem_object *obj, u64 offset, static void i915_gem_object_read_from_page_iomap(struct drm_i915_gem_object *obj, u64 offset, void *dst, int size) { + pgoff_t idx = offset >> PAGE_SHIFT; + dma_addr_t dma = i915_gem_object_get_dma_address(obj, idx); void __iomem *src_map; void __iomem *src_ptr; - dma_addr_t dma = i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT); src_map = io_mapping_map_wc(&obj->mm.region->iomap, dma - obj->mm.region->region.start, @@ -468,6 +470,7 @@ i915_gem_object_read_from_page_iomap(struct drm_i915_gem_object *obj, u64 offset */ int i915_gem_object_read_from_page(struct drm_i915_gem_object *obj, u64 offset, void *dst, int size) { + GEM_BUG_ON(overflows_type(offset >> PAGE_SHIFT, pgoff_t)); GEM_BUG_ON(offset >= obj->base.size); GEM_BUG_ON(offset_in_page(offset) > PAGE_SIZE - size); GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index e11d82a9f7c3..22c4ba0cd106 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -27,8 +27,10 @@ enum intel_region_id; * spot such a local variable, please consider fixing! * * Aside from our own locals (for which we have no excuse!): - * - sg_table embeds unsigned int for num_pages - * - get_user_pages*() mixed ints with longs + * - sg_table embeds unsigned int for nents + * + * We can check for invalidly typed locals with typecheck(), see for example + * i915_gem_object_get_sg(). */ #define GEM_CHECK_SIZE_OVERFLOW(sz) \ GEM_WARN_ON((sz) >> PAGE_SHIFT > INT_MAX) @@ -366,41 +368,70 @@ int i915_gem_object_set_tiling(struct drm_i915_gem_object *obj, struct scatterlist * __i915_gem_object_get_sg(struct drm_i915_gem_object *obj, struct i915_gem_object_page_iter *iter, - unsigned int n, - unsigned int *offset, bool dma); + pgoff_t n, + unsigned int *offset); + +#define __i915_gem_object_get_sg(obj, it, n, offset) ({ \ + exactly_pgoff_t(n); \ + (__i915_gem_object_get_sg)(obj, it, n, offset); \ +}) static inline struct scatterlist * -i915_gem_object_get_sg(struct drm_i915_gem_object *obj, - unsigned int n, +i915_gem_object_get_sg(struct drm_i915_gem_object *obj, pgoff_t n, unsigned int *offset) { - return __i915_gem_object_get_sg(obj, &obj->mm.get_page, n, offset, false); + return __i915_gem_object_get_sg(obj, &obj->mm.get_page, n, offset); } +#define i915_gem_object_get_sg(obj, n, offset) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_sg)(obj, n, offset); \ +}) + static inline struct scatterlist * -i915_gem_object_get_sg_dma(struct drm_i915_gem_object *obj, - unsigned int n, +i915_gem_object_get_sg_dma(struct drm_i915_gem_object *obj, pgoff_t n, unsigned int *offset) { - return __i915_gem_object_get_sg(obj, &obj->mm.get_dma_page, n, offset, true); + return __i915_gem_object_get_sg(obj, &obj->mm.get_dma_page, n, offset); } +#define i915_gem_object_get_sg_dma(obj, n, offset) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_sg_dma)(obj, n, offset); \ +}) + struct page * -i915_gem_object_get_page(struct drm_i915_gem_object *obj, - unsigned int n); +i915_gem_object_get_page(struct drm_i915_gem_object *obj, pgoff_t n); + +#define i915_gem_object_get_page(obj, n) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_page)(obj, n); \ +}) struct page * -i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, - unsigned int n); +i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, pgoff_t n); + +#define i915_gem_object_get_dirty_page(obj, n) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_dirty_page)(obj, n); \ +}) dma_addr_t -i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj, - unsigned long n, +i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj, pgoff_t n, unsigned int *len); +#define i915_gem_object_get_dma_address_len(obj, n, len) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_dma_address_len)(obj, n, len); \ +}) + dma_addr_t -i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, - unsigned long n); +i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, pgoff_t n); + +#define i915_gem_object_get_dma_address(obj, n) ({ \ + exactly_pgoff_t(n); \ + (i915_gem_object_get_dma_address)(obj, n); \ +}) void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj, struct sg_table *pages, diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c index 97c820eee115..1d1edcb3514b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c @@ -503,14 +503,16 @@ void __i915_gem_object_release_map(struct drm_i915_gem_object *obj) } struct scatterlist * -__i915_gem_object_get_sg(struct drm_i915_gem_object *obj, +(__i915_gem_object_get_sg)(struct drm_i915_gem_object *obj, struct i915_gem_object_page_iter *iter, - unsigned int n, - unsigned int *offset, - bool dma) + pgoff_t n, + unsigned int *offset) + { - struct scatterlist *sg; + const bool dma = iter == &obj->mm.get_dma_page || + iter == &obj->ttm.get_io_page; unsigned int idx, count; + struct scatterlist *sg; might_sleep(); GEM_BUG_ON(n >= obj->base.size >> PAGE_SHIFT); @@ -618,7 +620,7 @@ __i915_gem_object_get_sg(struct drm_i915_gem_object *obj, } struct page * -i915_gem_object_get_page(struct drm_i915_gem_object *obj, unsigned int n) +(i915_gem_object_get_page)(struct drm_i915_gem_object *obj, pgoff_t n) { struct scatterlist *sg; unsigned int offset; @@ -631,8 +633,7 @@ i915_gem_object_get_page(struct drm_i915_gem_object *obj, unsigned int n) /* Like i915_gem_object_get_page(), but mark the returned page dirty */ struct page * -i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, - unsigned int n) +(i915_gem_object_get_dirty_page)(struct drm_i915_gem_object *obj, pgoff_t n) { struct page *page; @@ -644,9 +645,8 @@ i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, } dma_addr_t -i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj, - unsigned long n, - unsigned int *len) +(i915_gem_object_get_dma_address_len)(struct drm_i915_gem_object *obj, + pgoff_t n, unsigned int *len) { struct scatterlist *sg; unsigned int offset; @@ -660,8 +660,7 @@ i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj, } dma_addr_t -i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, - unsigned long n) +(i915_gem_object_get_dma_address)(struct drm_i915_gem_object *obj, pgoff_t n) { return i915_gem_object_get_dma_address_len(obj, n, NULL); } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 4c25d9b2f138..bcdbefd8f269 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -711,7 +711,7 @@ static unsigned long i915_ttm_io_mem_pfn(struct ttm_buffer_object *bo, GEM_WARN_ON(bo->ttm); base = obj->mm.region->iomap.base - obj->mm.region->region.start; - sg = __i915_gem_object_get_sg(obj, &obj->ttm.get_io_page, page_offset, &ofs, true); + sg = __i915_gem_object_get_sg(obj, &obj->ttm.get_io_page, page_offset, &ofs); return ((base + sg_dma_address(sg)) >> PAGE_SHIFT) + ofs; } diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c index 93a67422ca3b..84d6edd9c204 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c @@ -455,7 +455,8 @@ static int gpu_fill(struct intel_context *ce, static int cpu_fill(struct drm_i915_gem_object *obj, u32 value) { const bool has_llc = HAS_LLC(to_i915(obj->base.dev)); - unsigned int n, m, need_flush; + unsigned int need_flush; + unsigned long n, m; int err; i915_gem_object_lock(obj, NULL); @@ -485,7 +486,8 @@ static int cpu_fill(struct drm_i915_gem_object *obj, u32 value) static noinline int cpu_check(struct drm_i915_gem_object *obj, unsigned int idx, unsigned int max) { - unsigned int n, m, needs_flush; + unsigned int needs_flush; + unsigned long n; int err; i915_gem_object_lock(obj, NULL); @@ -494,7 +496,7 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj, goto out_unlock; for (n = 0; n < real_page_count(obj); n++) { - u32 *map; + u32 *map, m; map = kmap_atomic(i915_gem_object_get_page(obj, n)); if (needs_flush & CLFLUSH_BEFORE) @@ -502,7 +504,7 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj, for (m = 0; m < max; m++) { if (map[m] != m) { - pr_err("%pS: Invalid value at object %d page %d/%ld, offset %d/%d: found %x expected %x\n", + pr_err("%pS: Invalid value at object %d page %ld/%ld, offset %d/%d: found %x expected %x\n", __builtin_return_address(0), idx, n, real_page_count(obj), m, max, map[m], m); @@ -513,7 +515,7 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj, for (; m < DW_PER_PAGE; m++) { if (map[m] != STACK_MAGIC) { - pr_err("%pS: Invalid value at object %d page %d, offset %d: found %x expected %x (uninitialised)\n", + pr_err("%pS: Invalid value at object %d page %ld, offset %d: found %x expected %x (uninitialised)\n", __builtin_return_address(0), idx, n, m, map[m], STACK_MAGIC); err = -EINVAL; diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c index 5bc93a1ce3e3..b674c1d7a045 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c @@ -93,11 +93,11 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj, struct drm_i915_private *i915 = to_i915(obj->base.dev); struct i915_ggtt_view view; struct i915_vma *vma; + unsigned long offset; unsigned long page; u32 __iomem *io; struct page *p; unsigned int n; - u64 offset; u32 *cpu; int err; @@ -154,7 +154,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj, cpu = kmap(p) + offset_in_page(offset); drm_clflush_virt_range(cpu, sizeof(*cpu)); if (*cpu != (u32)page) { - pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n", + pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%lu + %u [0x%lx]) of 0x%x, found 0x%x\n", page, n, view.partial.offset, view.partial.size, @@ -210,10 +210,10 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj, for_each_prime_number_from(page, 1, npages) { struct i915_ggtt_view view = compute_partial_view(obj, page, MIN_CHUNK_PAGES); + unsigned long offset; u32 __iomem *io; struct page *p; unsigned int n; - u64 offset; u32 *cpu; GEM_BUG_ON(view.partial.size > nreal); @@ -250,7 +250,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj, cpu = kmap(p) + offset_in_page(offset); drm_clflush_virt_range(cpu, sizeof(*cpu)); if (*cpu != (u32)page) { - pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n", + pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%lu + %u [0x%lx]) of 0x%x, found 0x%x\n", page, n, view.partial.offset, view.partial.size, diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_object.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_object.c index fe0a890775e2..bf30763ee6bc 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_object.c @@ -33,10 +33,10 @@ static int igt_gem_object(void *arg) static int igt_gem_huge(void *arg) { - const unsigned int nreal = 509; /* just to be awkward */ + const unsigned long nreal = 509; /* just to be awkward */ struct drm_i915_private *i915 = arg; struct drm_i915_gem_object *obj; - unsigned int n; + unsigned long n; int err; /* Basic sanitycheck of our huge fake object allocation */ @@ -49,7 +49,7 @@ static int igt_gem_huge(void *arg) err = i915_gem_object_pin_pages_unlocked(obj); if (err) { - pr_err("Failed to allocate %u pages (%lu total), err=%d\n", + pr_err("Failed to allocate %lu pages (%lu total), err=%d\n", nreal, obj->base.size / PAGE_SIZE, err); goto out; } @@ -57,7 +57,7 @@ static int igt_gem_huge(void *arg) for (n = 0; n < obj->base.size / PAGE_SIZE; n++) { if (i915_gem_object_get_page(obj, n) != i915_gem_object_get_page(obj, n % nreal)) { - pr_err("Page lookup mismatch at index %u [%u]\n", + pr_err("Page lookup mismatch at index %lu [%lu]\n", n, n % nreal); err = -EINVAL; goto out_unpin; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 702e5b89be22..dba58a3c3238 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -229,8 +229,9 @@ i915_gem_shmem_pread(struct drm_i915_gem_object *obj, struct drm_i915_gem_pread *args) { unsigned int needs_clflush; - unsigned int idx, offset; char __user *user_data; + unsigned long offset; + pgoff_t idx; u64 remain; int ret; @@ -383,13 +384,17 @@ i915_gem_gtt_pread(struct drm_i915_gem_object *obj, { struct drm_i915_private *i915 = to_i915(obj->base.dev); struct i915_ggtt *ggtt = to_gt(i915)->ggtt; + unsigned long remain, offset; intel_wakeref_t wakeref; struct drm_mm_node node; void __user *user_data; struct i915_vma *vma; - u64 remain, offset; int ret = 0; + if (overflows_type(args->size, remain) || + overflows_type(args->offset, offset)) + return -EINVAL; + wakeref = intel_runtime_pm_get(&i915->runtime_pm); vma = i915_gem_gtt_prepare(obj, &node, false); @@ -540,13 +545,17 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj, struct drm_i915_private *i915 = to_i915(obj->base.dev); struct i915_ggtt *ggtt = to_gt(i915)->ggtt; struct intel_runtime_pm *rpm = &i915->runtime_pm; + unsigned long remain, offset; intel_wakeref_t wakeref; struct drm_mm_node node; struct i915_vma *vma; - u64 remain, offset; void __user *user_data; int ret = 0; + if (overflows_type(args->size, remain) || + overflows_type(args->offset, offset)) + return -EINVAL; + if (i915_gem_object_has_struct_page(obj)) { /* * Avoid waking the device up if we can fallback, as @@ -654,8 +663,9 @@ i915_gem_shmem_pwrite(struct drm_i915_gem_object *obj, { unsigned int partial_cacheline_write; unsigned int needs_clflush; - unsigned int offset, idx; void __user *user_data; + unsigned long offset; + pgoff_t idx; u64 remain; int ret; diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index ea7648e3aa0e..b0b24f352fa9 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -441,4 +441,10 @@ static inline bool i915_run_as_guest(void) bool i915_vtd_active(struct drm_i915_private *i915); +/* A poor man's -Wconversion: only allow variables of an exact type. */ +#define exact_type(T, n) \ + BUILD_BUG_ON(!__builtin_constant_p(n) && !__builtin_types_compatible_p(T, typeof(n))) + +#define exactly_pgoff_t(n) exact_type(pgoff_t, n) + #endif /* !__I915_UTILS_H */ diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 0bffb70b3c5f..686aa0214e68 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -902,7 +902,7 @@ rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset, struct sg_table *st, struct scatterlist *sg) { unsigned int column, row; - unsigned int src_idx; + pgoff_t src_idx; for (column = 0; column < width; column++) { unsigned int left; @@ -1008,7 +1008,7 @@ add_padding_pages(unsigned int count, static struct scatterlist * remap_tiled_color_plane_pages(struct drm_i915_gem_object *obj, - unsigned int offset, unsigned int alignment_pad, + unsigned long offset, unsigned int alignment_pad, unsigned int width, unsigned int height, unsigned int src_stride, unsigned int dst_stride, struct sg_table *st, struct scatterlist *sg, @@ -1067,7 +1067,7 @@ remap_tiled_color_plane_pages(struct drm_i915_gem_object *obj, static struct scatterlist * remap_contiguous_pages(struct drm_i915_gem_object *obj, - unsigned int obj_offset, + pgoff_t obj_offset, unsigned int count, struct sg_table *st, struct scatterlist *sg) { @@ -1100,7 +1100,7 @@ remap_contiguous_pages(struct drm_i915_gem_object *obj, static struct scatterlist * remap_linear_color_plane_pages(struct drm_i915_gem_object *obj, - unsigned int obj_offset, unsigned int alignment_pad, + pgoff_t obj_offset, unsigned int alignment_pad, unsigned int size, struct sg_table *st, struct scatterlist *sg, unsigned int *gtt_offset)