From patchwork Thu Apr 21 18:49:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bob Beckett X-Patchwork-Id: 12822252 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 8E29EC43219 for ; Thu, 21 Apr 2022 18:50:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 782B110E989; Thu, 21 Apr 2022 18:50:08 +0000 (UTC) Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 486D610E982; Thu, 21 Apr 2022 18:50:04 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: bbeckett) with ESMTPSA id B53D21F45B77 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1650567003; bh=F0jhrja8tJyJ62xMJtKLdLkN+X6aU+6GfbfRc6BbAbw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TCJ2LVVpDfZ0JDGpn3zuETLQ9KkwUX6+FB2f0qtP3dyHe48SckiMQtthsKBu+wln8 3LMLKiQoB5x6CIvDDziOxjGs0FYlNq2sFUol0PvNF3NAp5TeI6fETUcN7D81JXXtpw kqkcBXD234crqt74XdtpQzWPMhhsrG6CD2nJ6e1Q7yq9qUg/s2te2w6eD5LfmntoGG gZoFH+hqA6Mlb0peUxb6QRS87TK1t4DFlCSrxEnxg+Xp8fxf/S3ZLE/qL/vyPJEy2m 5EblMV0i6a416lbOPCfcHgSI4QWcqbzcFI4YrqEMszAdwu1uPeyq/Ybw5zaQ+4RGVv dQW2H3bBBFokw== From: Robert Beckett To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter Date: Thu, 21 Apr 2022 18:49:41 +0000 Message-Id: <20220421184941.428639-7-bob.beckett@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220421184941.428639-1-bob.beckett@collabora.com> References: <20220421184941.428639-1-bob.beckett@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 6/6] drm/i915: stolen memory use ttm backend 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: =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Matthew Auld , linux-kernel@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" refactor stolen memory region to use ttm. this necessitates using ttm resources to track reserved stolen regions instead of drm_mm_nodes. Signed-off-by: Robert Beckett --- drivers/gpu/drm/i915/display/intel_fbc.c | 78 +-- .../gpu/drm/i915/gem/i915_gem_object_types.h | 2 - drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 451 ++++++++---------- drivers/gpu/drm/i915/gem/i915_gem_stolen.h | 21 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 7 + drivers/gpu/drm/i915/gt/intel_rc6.c | 4 +- drivers/gpu/drm/i915/gt/selftest_reset.c | 16 +- drivers/gpu/drm/i915/i915_debugfs.c | 7 +- drivers/gpu/drm/i915/i915_drv.h | 5 - drivers/gpu/drm/i915/intel_region_ttm.c | 36 +- drivers/gpu/drm/i915/intel_region_ttm.h | 8 +- drivers/gpu/drm/i915/selftests/mock_region.c | 3 +- 12 files changed, 302 insertions(+), 336 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index b653f3ba7c66..dbad1b6471b8 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -38,6 +38,7 @@ * forcibly disable it to allow proper screen updates. */ +#include "gem/i915_gem_stolen.h" #include #include @@ -51,6 +52,7 @@ #include "intel_display_types.h" #include "intel_fbc.h" #include "intel_frontbuffer.h" +#include "gem/i915_gem_region.h" #define for_each_fbc_id(__dev_priv, __fbc_id) \ for ((__fbc_id) = INTEL_FBC_A; (__fbc_id) < I915_MAX_FBCS; (__fbc_id)++) \ @@ -93,8 +95,8 @@ struct intel_fbc { unsigned int possible_framebuffer_bits; unsigned int busy_bits; - struct drm_mm_node compressed_fb; - struct drm_mm_node compressed_llb; + struct ttm_resource *compressed_fb; + struct ttm_resource *compressed_llb; enum intel_fbc_id id; @@ -332,16 +334,20 @@ static void i8xx_fbc_nuke(struct intel_fbc *fbc) static void i8xx_fbc_program_cfb(struct intel_fbc *fbc) { struct drm_i915_private *i915 = fbc->i915; + u64 fb_offset = i915_gem_stolen_reserve_offset(fbc->compressed_fb); + u64 llb_offset = i915_gem_stolen_reserve_offset(fbc->compressed_llb); + GEM_BUG_ON(fb_offset == I915_BO_INVALID_OFFSET); + GEM_BUG_ON(llb_offset == I915_BO_INVALID_OFFSET); GEM_BUG_ON(range_overflows_end_t(u64, i915->dsm.start, - fbc->compressed_fb.start, U32_MAX)); + fb_offset, U32_MAX)); GEM_BUG_ON(range_overflows_end_t(u64, i915->dsm.start, - fbc->compressed_llb.start, U32_MAX)); + llb_offset, U32_MAX)); intel_de_write(i915, FBC_CFB_BASE, - i915->dsm.start + fbc->compressed_fb.start); + i915->dsm.start + fb_offset); intel_de_write(i915, FBC_LL_BASE, - i915->dsm.start + fbc->compressed_llb.start); + i915->dsm.start + llb_offset); } static const struct intel_fbc_funcs i8xx_fbc_funcs = { @@ -449,8 +455,10 @@ static bool g4x_fbc_is_compressing(struct intel_fbc *fbc) static void g4x_fbc_program_cfb(struct intel_fbc *fbc) { struct drm_i915_private *i915 = fbc->i915; + u64 fb_offset = i915_gem_stolen_reserve_offset(fbc->compressed_fb); - intel_de_write(i915, DPFC_CB_BASE, fbc->compressed_fb.start); + GEM_BUG_ON(fb_offset == I915_BO_INVALID_OFFSET); + intel_de_write(i915, DPFC_CB_BASE, fb_offset); } static const struct intel_fbc_funcs g4x_fbc_funcs = { @@ -500,8 +508,10 @@ static bool ilk_fbc_is_compressing(struct intel_fbc *fbc) static void ilk_fbc_program_cfb(struct intel_fbc *fbc) { struct drm_i915_private *i915 = fbc->i915; + u64 fb_offset = i915_gem_stolen_reserve_offset(fbc->compressed_fb); - intel_de_write(i915, ILK_DPFC_CB_BASE(fbc->id), fbc->compressed_fb.start); + GEM_BUG_ON(fb_offset == I915_BO_INVALID_OFFSET); + intel_de_write(i915, ILK_DPFC_CB_BASE(fbc->id), fb_offset); } static const struct intel_fbc_funcs ilk_fbc_funcs = { @@ -741,21 +751,24 @@ static int find_compression_limit(struct intel_fbc *fbc, { struct drm_i915_private *i915 = fbc->i915; u64 end = intel_fbc_stolen_end(i915); - int ret, limit = min_limit; + int limit = min_limit; + struct ttm_resource *res; size /= limit; /* Try to over-allocate to reduce reallocations and fragmentation. */ - ret = i915_gem_stolen_insert_node_in_range(i915, &fbc->compressed_fb, - size <<= 1, 4096, 0, end); - if (ret == 0) + res = i915_gem_stolen_reserve_range(i915, size <<= 1, 0, end); + if (!IS_ERR(res)) { + fbc->compressed_fb = res; return limit; + } for (; limit <= intel_fbc_max_limit(i915); limit <<= 1) { - ret = i915_gem_stolen_insert_node_in_range(i915, &fbc->compressed_fb, - size >>= 1, 4096, 0, end); - if (ret == 0) + res = i915_gem_stolen_reserve_range(i915, size >>= 1, 0, end); + if (!IS_ERR(res)) { + fbc->compressed_fb = res; return limit; + } } return 0; @@ -766,17 +779,18 @@ static int intel_fbc_alloc_cfb(struct intel_fbc *fbc, { struct drm_i915_private *i915 = fbc->i915; int ret; + struct ttm_resource *res; - drm_WARN_ON(&i915->drm, - drm_mm_node_allocated(&fbc->compressed_fb)); - drm_WARN_ON(&i915->drm, - drm_mm_node_allocated(&fbc->compressed_llb)); + drm_WARN_ON(&i915->drm, fbc->compressed_fb); + drm_WARN_ON(&i915->drm, fbc->compressed_llb); if (DISPLAY_VER(i915) < 5 && !IS_G4X(i915)) { - ret = i915_gem_stolen_insert_node(i915, &fbc->compressed_llb, - 4096, 4096); - if (ret) + res = i915_gem_stolen_reserve_range(i915, 4096, I915_GEM_STOLEN_BIAS, 0); + if (IS_ERR(res)) { + ret = PTR_ERR(res); goto err; + } + fbc->compressed_llb = res; } ret = find_compression_limit(fbc, size, min_limit); @@ -790,15 +804,14 @@ static int intel_fbc_alloc_cfb(struct intel_fbc *fbc, drm_dbg_kms(&i915->drm, "reserved %llu bytes of contiguous stolen space for FBC, limit: %d\n", - fbc->compressed_fb.size, fbc->limit); + i915_gem_stolen_reserve_size(fbc->compressed_fb), fbc->limit); return 0; err_llb: - if (drm_mm_node_allocated(&fbc->compressed_llb)) - i915_gem_stolen_remove_node(i915, &fbc->compressed_llb); + i915_gem_stolen_release_range(i915, fetch_and_zero(&fbc->compressed_llb)); err: - if (drm_mm_initialized(&i915->mm.stolen)) + if (IS_ERR(res) && (PTR_ERR(res) == -ENOMEM || PTR_ERR(res) == -ENXIO)) drm_info_once(&i915->drm, "not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size); return -ENOSPC; } @@ -815,10 +828,10 @@ static void __intel_fbc_cleanup_cfb(struct intel_fbc *fbc) if (WARN_ON(intel_fbc_hw_is_active(fbc))) return; - if (drm_mm_node_allocated(&fbc->compressed_llb)) - i915_gem_stolen_remove_node(i915, &fbc->compressed_llb); - if (drm_mm_node_allocated(&fbc->compressed_fb)) - i915_gem_stolen_remove_node(i915, &fbc->compressed_fb); + if (fbc->compressed_llb) + i915_gem_stolen_release_range(i915, fetch_and_zero(&fbc->compressed_llb)); + if (fbc->compressed_fb) + i915_gem_stolen_release_range(i915, fetch_and_zero(&fbc->compressed_fb)); } void intel_fbc_cleanup(struct drm_i915_private *i915) @@ -1022,9 +1035,10 @@ static bool intel_fbc_is_cfb_ok(const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct intel_fbc *fbc = plane->fbc; + u64 fb_size = i915_gem_stolen_reserve_size(fbc->compressed_fb); return intel_fbc_min_limit(plane_state) <= fbc->limit && - intel_fbc_cfb_size(plane_state) <= fbc->compressed_fb.size * fbc->limit; + intel_fbc_cfb_size(plane_state) <= fb_size * fbc->limit; } static bool intel_fbc_is_ok(const struct intel_plane_state *plane_state) @@ -1703,7 +1717,7 @@ void intel_fbc_init(struct drm_i915_private *i915) { enum intel_fbc_id fbc_id; - if (!drm_mm_initialized(&i915->mm.stolen)) + if (!i915->mm.stolen_region) mkwrite_device_info(i915)->display.fbc_mask = 0; if (need_fbc_vtd_wa(i915)) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 2c88bdb8ff7c..492600907e99 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -629,8 +629,6 @@ struct drm_i915_gem_object { } userptr; #endif - struct drm_mm_node *stolen; - resource_size_t bo_offset; unsigned long scratch; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c index 47b5e0e342ab..06af7478c29f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c @@ -4,75 +4,111 @@ * Copyright © 2008-2012 Intel Corporation */ +#include "drm/ttm/ttm_placement.h" +#include "gem/i915_gem_object_types.h" #include #include -#include #include #include "gem/i915_gem_lmem.h" #include "gem/i915_gem_region.h" #include "gt/intel_gt.h" #include "gt/intel_region_lmem.h" +#include "gem/i915_gem_ttm.h" #include "i915_drv.h" #include "i915_gem_stolen.h" #include "i915_reg.h" #include "i915_utils.h" #include "i915_vgpu.h" #include "intel_mchbar_regs.h" +#include "intel_region_ttm.h" -/* - * The BIOS typically reserves some of the system's memory for the exclusive - * use of the integrated graphics. This memory is no longer available for - * use by the OS and so the user finds that his system has less memory - * available than he put in. We refer to this memory as stolen. - * - * The BIOS will allocate its framebuffer from the stolen memory. Our - * goal is try to reuse that object for our own fbcon which must always - * be available for panics. Anything else we can reuse the stolen memory - * for is a boon. - */ +struct stolen_region { + struct intel_memory_region region; + struct ttm_resource *wa_resvd; +}; -int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *i915, - struct drm_mm_node *node, u64 size, - unsigned alignment, u64 start, u64 end) +inline struct stolen_region *to_stolen_region(struct intel_memory_region *mem) { - int ret; - - if (!drm_mm_initialized(&i915->mm.stolen)) - return -ENODEV; + return container_of(mem, struct stolen_region, region); +} - /* WaSkipStolenMemoryFirstPage:bdw+ */ - if (GRAPHICS_VER(i915) >= 8 && start < 4096) - start = 4096; +/** + * i915_gem_stolen_reserve_range - reserve a region of space in a given range + * @i915: i915 device instance + * @size: size of region to reserve + * @start: start of search area + * @end: end of search area + * + * Search for @size amount of free space within the region delimeted by @start and @end. + * If found reserve it from future use until later release with @i915_gem_stolen_release_range. + * + * Return: pointer to resource tracking structure on success, ERR_PTR otherwise + */ +struct ttm_resource * +i915_gem_stolen_reserve_range(struct drm_i915_private *i915, + resource_size_t size, + u64 start, u64 end) +{ + struct intel_memory_region *mem = i915->mm.stolen_region; - mutex_lock(&i915->mm.stolen_lock); - ret = drm_mm_insert_node_in_range(&i915->mm.stolen, node, - size, alignment, 0, - start, end, DRM_MM_INSERT_BEST); - mutex_unlock(&i915->mm.stolen_lock); + if (!mem) + return ERR_PTR(-ENODEV); + return intel_region_ttm_resource_alloc(mem, size, start, end, I915_BO_ALLOC_CONTIGUOUS); +} - return ret; +/** + * i915_gem_stolen_reserve_offset - return the offset of the reserved space + * @res: pointer to resource tracking structure to check + * + * Return: The offset of the reserved resource, or I915_BO_INVALID_OFFSET on error + */ +u64 i915_gem_stolen_reserve_offset(struct ttm_resource *res) +{ + if (!res) + return I915_BO_INVALID_OFFSET; + return PFN_PHYS(res->start); } -int i915_gem_stolen_insert_node(struct drm_i915_private *i915, - struct drm_mm_node *node, u64 size, - unsigned alignment) +/** + * i915_gem_stolen_reserve_size - return the reserved size of the reserved space + * @res: pointer to resource tracking structure to check + * + * Return: The size of the reserved resource, or I915_BO_INVALID_OFFSET on error + */ +u64 i915_gem_stolen_reserve_size(struct ttm_resource *res) { - return i915_gem_stolen_insert_node_in_range(i915, node, - size, alignment, - I915_GEM_STOLEN_BIAS, - U64_MAX); + if (!res) + return I915_BO_INVALID_OFFSET; + return PFN_PHYS(res->num_pages); } -void i915_gem_stolen_remove_node(struct drm_i915_private *i915, - struct drm_mm_node *node) +/** + * i915_gem_stolen_release_range - release the reserved area to be free for allocation again + * @i915: i915 device instance + * @res: pointer to resource tracking structure allocated via @i915_gem_stolen_reserve_range + */ +void i915_gem_stolen_release_range(struct drm_i915_private *i915, + struct ttm_resource *res) { - mutex_lock(&i915->mm.stolen_lock); - drm_mm_remove_node(node); - mutex_unlock(&i915->mm.stolen_lock); + struct intel_memory_region *mem = i915->mm.stolen_region; + + intel_region_ttm_resource_free(mem, res); } +/* + * The BIOS typically reserves some of the system's memory for the exclusive + * use of the integrated graphics. This memory is no longer available for + * use by the OS and so the user finds that his system has less memory + * available than he put in. We refer to this memory as stolen. + * + * The BIOS will allocate its framebuffer from the stolen memory. Our + * goal is try to reuse that object for our own fbcon which must always + * be available for panics. Anything else we can reuse the stolen memory + * for is a boon. + */ + static int i915_adjust_stolen(struct drm_i915_private *i915, struct resource *dsm) { @@ -173,14 +209,6 @@ static int i915_adjust_stolen(struct drm_i915_private *i915, return 0; } -static void i915_gem_cleanup_stolen(struct drm_i915_private *i915) -{ - if (!drm_mm_initialized(&i915->mm.stolen)) - return; - - drm_mm_takedown(&i915->mm.stolen); -} - static void g4x_get_stolen_reserved(struct drm_i915_private *i915, struct intel_uncore *uncore, resource_size_t *base, @@ -394,8 +422,7 @@ static int i915_gem_init_stolen(struct intel_memory_region *mem) struct intel_uncore *uncore = &i915->uncore; resource_size_t reserved_base, stolen_top; resource_size_t reserved_total, reserved_size; - - mutex_init(&i915->mm.stolen_lock); + int ret; if (intel_vgpu_active(i915)) { drm_notice(&i915->drm, @@ -513,258 +540,121 @@ static int i915_gem_init_stolen(struct intel_memory_region *mem) return 0; /* Basic memrange allocator for stolen space. */ - drm_mm_init(&i915->mm.stolen, 0, i915->stolen_usable_size); - - return 0; -} - -static void dbg_poison(struct i915_ggtt *ggtt, - dma_addr_t addr, resource_size_t size, - u8 x) -{ -#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) - if (!drm_mm_node_allocated(&ggtt->error_capture)) - return; - - if (ggtt->vm.bind_async_flags & I915_VMA_GLOBAL_BIND) - return; /* beware stop_machine() inversion */ + ret = intel_region_ttm_init(mem); + if (ret) + return ret; - GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE)); + /* WaSkipStolenMemoryFirstPage:bdw+ */ + if (GRAPHICS_VER(i915) >= 8) { + struct stolen_region *region = to_stolen_region(mem); + struct ttm_resource *resvd; + + resvd = intel_region_ttm_resource_alloc(mem, 4096, 0, 4096, 0); + if (IS_ERR(resvd)) { + ret = PTR_ERR(resvd); + goto err_no_reserve; + } - mutex_lock(&ggtt->error_mutex); - while (size) { - void __iomem *s; + region->wa_resvd = resvd; + } - ggtt->vm.insert_page(&ggtt->vm, addr, - ggtt->error_capture.start, - I915_CACHE_NONE, 0); - mb(); + return ret; - s = io_mapping_map_wc(&ggtt->iomap, - ggtt->error_capture.start, - PAGE_SIZE); - memset_io(s, x, PAGE_SIZE); - io_mapping_unmap(s); +err_no_reserve: + intel_region_ttm_fini(mem); - addr += PAGE_SIZE; - size -= PAGE_SIZE; - } - mb(); - ggtt->vm.clear_range(&ggtt->vm, ggtt->error_capture.start, PAGE_SIZE); - mutex_unlock(&ggtt->error_mutex); -#endif + return ret; } -static struct sg_table * -i915_pages_create_for_stolen(struct drm_device *dev, - resource_size_t offset, resource_size_t size) +struct drm_i915_gem_object * +i915_gem_object_create_stolen(struct drm_i915_private *i915, + resource_size_t size) { - struct drm_i915_private *i915 = to_i915(dev); - struct sg_table *st; - struct scatterlist *sg; - - GEM_BUG_ON(range_overflows(offset, size, resource_size(&i915->dsm))); - - /* We hide that we have no struct page backing our stolen object - * by wrapping the contiguous physical allocation with a fake - * dma mapping in a single scatterlist. - */ - - st = kmalloc(sizeof(*st), GFP_KERNEL); - if (st == NULL) - return ERR_PTR(-ENOMEM); - - if (sg_alloc_table(st, 1, GFP_KERNEL)) { - kfree(st); - return ERR_PTR(-ENOMEM); - } - - sg = st->sgl; - sg->offset = 0; - sg->length = size; + struct drm_i915_gem_object *obj; + int ret; - sg_dma_address(sg) = (dma_addr_t)i915->dsm.start + offset; - sg_dma_len(sg) = size; + obj = i915_gem_object_create_region(i915->mm.stolen_region, size, 0, + I915_BO_ALLOC_CONTIGUOUS); + if (IS_ERR(obj)) + return obj; - return st; -} + ret = i915_gem_object_lock(obj, NULL); + if (ret) + goto err_lock; -static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) -{ - struct drm_i915_private *i915 = to_i915(obj->base.dev); - struct sg_table *pages = - i915_pages_create_for_stolen(obj->base.dev, - obj->stolen->start, - obj->stolen->size); - if (IS_ERR(pages)) - return PTR_ERR(pages); + ret = i915_gem_object_pin_pages(obj); + if (ret) + goto err_pin; - dbg_poison(to_gt(i915)->ggtt, - sg_dma_address(pages->sgl), - sg_dma_len(pages->sgl), - POISON_INUSE); + i915_gem_object_unlock(obj); - __i915_gem_object_set_pages(obj, pages, obj->stolen->size); + return obj; - return 0; +err_pin: + i915_gem_object_unlock(obj); +err_lock: + i915_gem_object_put(obj); + return ERR_PTR(ret); } -static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, - struct sg_table *pages) +static struct intel_memory_region *alloc_stolen_region(void) { - struct drm_i915_private *i915 = to_i915(obj->base.dev); - /* Should only be called from i915_gem_object_release_stolen() */ + struct stolen_region *region = kzalloc(sizeof(struct stolen_region), GFP_KERNEL); - dbg_poison(to_gt(i915)->ggtt, - sg_dma_address(pages->sgl), - sg_dma_len(pages->sgl), - POISON_FREE); + if (!region) + return NULL; - sg_free_table(pages); - kfree(pages); + return ®ion->region; } -static void -i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) +static void free_stolen_region(struct intel_memory_region *mem) { - struct drm_i915_private *i915 = to_i915(obj->base.dev); - struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen); - - GEM_BUG_ON(!stolen); - i915_gem_stolen_remove_node(i915, stolen); - kfree(stolen); + struct stolen_region *region = to_stolen_region(mem); - i915_gem_object_release_memory_region(obj); + kfree(region); } -static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { - .name = "i915_gem_object_stolen", - .get_pages = i915_gem_object_get_pages_stolen, - .put_pages = i915_gem_object_put_pages_stolen, - .release = i915_gem_object_release_stolen, -}; - -static int __i915_gem_object_create_stolen(struct intel_memory_region *mem, - struct drm_i915_gem_object *obj, - struct drm_mm_node *stolen) +static int init_stolen_smem(struct intel_memory_region *mem) { - static struct lock_class_key lock_class; - unsigned int cache_level; - unsigned int flags; - int err; - /* - * Stolen objects are always physically contiguous since we just - * allocate one big block underneath using the drm_mm range allocator. + * Initialise stolen early so that we may reserve preallocated + * objects for the BIOS to KMS transition. */ - flags = I915_BO_ALLOC_CONTIGUOUS; - - drm_gem_private_object_init(&mem->i915->drm, &obj->base, stolen->size); - i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class, flags); - - obj->stolen = stolen; - obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; - cache_level = HAS_LLC(mem->i915) ? I915_CACHE_LLC : I915_CACHE_NONE; - i915_gem_object_set_cache_coherency(obj, cache_level); - - if (WARN_ON(!i915_gem_object_trylock(obj, NULL))) - return -EBUSY; + return i915_gem_init_stolen(mem); +} - i915_gem_object_init_memory_region(obj, mem); +static int release_stolen(struct intel_memory_region *mem) +{ + struct stolen_region *region = to_stolen_region(mem); - err = i915_gem_object_pin_pages(obj); - if (err) - i915_gem_object_release_memory_region(obj); - i915_gem_object_unlock(obj); + if (region->wa_resvd) + intel_region_ttm_resource_free(mem, region->wa_resvd); - return err; + return intel_region_ttm_fini(mem); } -static int _i915_gem_object_stolen_init(struct intel_memory_region *mem, - struct drm_i915_gem_object *obj, - resource_size_t offset, - resource_size_t size, - resource_size_t page_size, - unsigned int flags) +static int stolen_object_init(struct intel_memory_region *mem, + struct drm_i915_gem_object *obj, + resource_size_t offset, + resource_size_t size, + resource_size_t page_size, + unsigned int flags) { - struct drm_i915_private *i915 = mem->i915; - struct drm_mm_node *stolen; - int ret; - - if (!drm_mm_initialized(&i915->mm.stolen)) + if (!mem->region_private) return -ENODEV; if (size == 0) return -EINVAL; - /* - * With discrete devices, where we lack a mappable aperture there is no - * possible way to ever access this memory on the CPU side. - */ - if (mem->type == INTEL_MEMORY_STOLEN_LOCAL && !mem->io_size && - !(flags & I915_BO_ALLOC_GPU_ONLY)) - return -ENOSPC; - - stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); - if (!stolen) - return -ENOMEM; - - if (offset != I915_BO_INVALID_OFFSET) { - drm_dbg(&i915->drm, - "creating preallocated stolen object: stolen_offset=%pa, size=%pa\n", - &offset, &size); - - stolen->start = offset; - stolen->size = size; - mutex_lock(&i915->mm.stolen_lock); - ret = drm_mm_reserve_node(&i915->mm.stolen, stolen); - mutex_unlock(&i915->mm.stolen_lock); - } else { - ret = i915_gem_stolen_insert_node(i915, stolen, size, - mem->min_page_size); - } - if (ret) - goto err_free; - - ret = __i915_gem_object_create_stolen(mem, obj, stolen); - if (ret) - goto err_remove; - - return 0; - -err_remove: - i915_gem_stolen_remove_node(i915, stolen); -err_free: - kfree(stolen); - return ret; -} - -struct drm_i915_gem_object * -i915_gem_object_create_stolen(struct drm_i915_private *i915, - resource_size_t size) -{ - return i915_gem_object_create_region(i915->mm.stolen_region, size, 0, 0); -} - -static int init_stolen_smem(struct intel_memory_region *mem) -{ - /* - * Initialise stolen early so that we may reserve preallocated - * objects for the BIOS to KMS transition. - */ - return i915_gem_init_stolen(mem); -} - -static int release_stolen_smem(struct intel_memory_region *mem) -{ - i915_gem_cleanup_stolen(mem->i915); - return 0; + return __i915_gem_ttm_object_init(mem, obj, offset, size, page_size, flags); } static const struct intel_memory_region_ops i915_region_stolen_smem_ops = { .init = init_stolen_smem, - .release = release_stolen_smem, - .init_object = _i915_gem_object_stolen_init, + .release = release_stolen, + .init_object = stolen_object_init, + .alloc = alloc_stolen_region, + .free = free_stolen_region, }; static int init_stolen_lmem(struct intel_memory_region *mem) @@ -793,7 +683,7 @@ static int init_stolen_lmem(struct intel_memory_region *mem) return 0; err_cleanup: - i915_gem_cleanup_stolen(mem->i915); + intel_region_ttm_fini(mem); return err; } @@ -801,14 +691,15 @@ static int release_stolen_lmem(struct intel_memory_region *mem) { if (mem->io_size) io_mapping_fini(&mem->iomap); - i915_gem_cleanup_stolen(mem->i915); - return 0; + return release_stolen(mem); } static const struct intel_memory_region_ops i915_region_stolen_lmem_ops = { .init = init_stolen_lmem, .release = release_stolen_lmem, - .init_object = _i915_gem_object_stolen_init, + .init_object = __i915_gem_ttm_object_init, + .alloc = alloc_stolen_region, + .free = free_stolen_region, }; struct intel_memory_region * @@ -896,7 +787,37 @@ i915_gem_stolen_smem_setup(struct drm_i915_private *i915, u16 type, return mem; } -bool i915_gem_object_is_stolen(const struct drm_i915_gem_object *obj) +/** + * i915_gem_object_stolen_offset - return offset from start of stolen region + * @obj: the object to return the offset of + * + * Get the offset from stolen region if this object is currently placed in stolen memory. + * + * Return: offset from stolen if successful, I915_BO_INVALID_OFFSET otherwise + */ +u64 i915_gem_object_stolen_offset(struct drm_i915_gem_object *obj) +{ + struct ttm_buffer_object *ttm_obj; + + if (!obj || !i915_gem_object_is_stolen(obj)) + return I915_BO_INVALID_OFFSET; + + ttm_obj = i915_gem_to_ttm(obj); + if (ttm_obj->resource->mem_type != I915_PL_STOLEN) + return I915_BO_INVALID_OFFSET; + + return PFN_PHYS(ttm_obj->resource->start); +} + +bool i915_gem_object_is_stolen(struct drm_i915_gem_object *obj) { - return obj->ops == &i915_gem_object_stolen_ops; + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); + +#ifdef CONFIG_LOCKDEP + if (i915_gem_object_migratable(obj) && + i915_gem_object_evictable(obj)) + assert_object_held(obj); +#endif + return mr && (mr->type == INTEL_MEMORY_STOLEN_SYSTEM || + mr->type == INTEL_MEMORY_STOLEN_LOCAL); } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h index d5005a39d130..b39cb6e6c768 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h @@ -10,17 +10,9 @@ struct drm_i915_private; struct drm_mm_node; +struct ttm_resource; struct drm_i915_gem_object; -int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, - struct drm_mm_node *node, u64 size, - unsigned alignment); -int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv, - struct drm_mm_node *node, u64 size, - unsigned alignment, u64 start, - u64 end); -void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, - struct drm_mm_node *node); struct intel_memory_region * i915_gem_stolen_smem_setup(struct drm_i915_private *i915, u16 type, u16 instance); @@ -32,7 +24,16 @@ struct drm_i915_gem_object * i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, resource_size_t size); -bool i915_gem_object_is_stolen(const struct drm_i915_gem_object *obj); +u64 i915_gem_object_stolen_offset(struct drm_i915_gem_object *obj); +bool i915_gem_object_is_stolen(struct drm_i915_gem_object *obj); +struct ttm_resource * +i915_gem_stolen_reserve_range(struct drm_i915_private *i915, + resource_size_t size, + u64 start, u64 end); +u64 i915_gem_stolen_reserve_offset(struct ttm_resource *res); +u64 i915_gem_stolen_reserve_size(struct ttm_resource *res); +void i915_gem_stolen_release_range(struct drm_i915_private *i915, + struct ttm_resource *res); #define I915_GEM_STOLEN_BIAS SZ_128K diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h index 73e371aa3850..81654a51df51 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h @@ -49,6 +49,13 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, resource_size_t size, resource_size_t page_size, unsigned int flags); +int i915_gem_ttm_object_init_in_place(struct intel_memory_region *mem, + struct drm_i915_gem_object *obj, + resource_size_t size, + resource_size_t page_size, + unsigned int flags, + u64 start, + u64 end); /* Internal I915 TTM declarations and definitions below. */ diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c index b4770690e794..269b7f467fdf 100644 --- a/drivers/gpu/drm/i915/gt/intel_rc6.c +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c @@ -355,9 +355,9 @@ static int vlv_rc6_init(struct intel_rc6 *rc6) GEM_BUG_ON(range_overflows_end_t(u64, i915->dsm.start, - pctx->stolen->start, + i915_gem_object_stolen_offset(pctx), U32_MAX)); - pctx_paddr = i915->dsm.start + pctx->stolen->start; + pctx_paddr = i915->dsm.start + i915_gem_object_stolen_offset(pctx); intel_uncore_write(uncore, VLV_PCBR, pctx_paddr); out: diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c b/drivers/gpu/drm/i915/gt/selftest_reset.c index 37c38bdd5f47..75bc7d90c9dc 100644 --- a/drivers/gpu/drm/i915/gt/selftest_reset.c +++ b/drivers/gpu/drm/i915/gt/selftest_reset.c @@ -6,6 +6,7 @@ #include #include "gem/i915_gem_stolen.h" +#include "intel_region_ttm.h" #include "i915_memcpy.h" #include "i915_selftest.h" @@ -83,6 +84,7 @@ __igt_reset_stolen(struct intel_gt *gt, dma_addr_t dma = (dma_addr_t)dsm->start + (page << PAGE_SHIFT); void __iomem *s; void *in; + bool busy; ggtt->vm.insert_page(&ggtt->vm, dma, ggtt->error_capture.start, @@ -93,9 +95,9 @@ __igt_reset_stolen(struct intel_gt *gt, ggtt->error_capture.start, PAGE_SIZE); - if (!__drm_mm_interval_first(>->i915->mm.stolen, - page << PAGE_SHIFT, - ((page + 1) << PAGE_SHIFT) - 1)) + busy = intel_region_ttm_range_busy(gt->i915->mm.stolen_region, + PFN_PHYS(page), PAGE_SIZE); + if (!busy) memset_io(s, STACK_MAGIC, PAGE_SIZE); in = (void __force *)s; @@ -124,6 +126,7 @@ __igt_reset_stolen(struct intel_gt *gt, void __iomem *s; void *in; u32 x; + bool busy; ggtt->vm.insert_page(&ggtt->vm, dma, ggtt->error_capture.start, @@ -139,10 +142,9 @@ __igt_reset_stolen(struct intel_gt *gt, in = tmp; x = crc32_le(0, in, PAGE_SIZE); - if (x != crc[page] && - !__drm_mm_interval_first(>->i915->mm.stolen, - page << PAGE_SHIFT, - ((page + 1) << PAGE_SHIFT) - 1)) { + busy = intel_region_ttm_range_busy(gt->i915->mm.stolen_region, + PFN_PHYS(page), PAGE_SIZE); + if (x != crc[page] && !busy) { pr_debug("unused stolen page %pa modified by GPU reset\n", &page); if (count++ == 0) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 94e5c29d2ee3..e538b8f71dcc 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -32,6 +32,7 @@ #include +#include "gem/i915_gem_region.h" #include "gem/i915_gem_context.h" #include "gt/intel_gt.h" #include "gt/intel_gt_buffer_pool.h" @@ -157,6 +158,7 @@ i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj) struct drm_i915_private *dev_priv = to_i915(obj->base.dev); struct i915_vma *vma; int pin_count = 0; + u64 offset; seq_printf(m, "%pK: %c%c%c %8zdKiB %02x %02x %s%s%s", &obj->base, @@ -241,8 +243,9 @@ i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj) spin_unlock(&obj->vma.lock); seq_printf(m, " (pinned x %d)", pin_count); - if (i915_gem_object_is_stolen(obj)) - seq_printf(m, " (stolen: %08llx)", obj->stolen->start); + offset = i915_gem_object_stolen_offset(obj); + if (offset != I915_BO_INVALID_OFFSET) + seq_printf(m, " (stolen: %08llx)", offset); if (i915_gem_object_is_framebuffer(obj)) seq_printf(m, " (fb)"); } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9274417cd87a..92ecc4558d3f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -231,11 +231,6 @@ struct i915_gem_mm { * support stolen. */ struct intel_memory_region *stolen_region; - /** Memory allocator for GTT stolen memory */ - struct drm_mm stolen; - /** Protects the usage of the GTT stolen memory allocator. This is - * always the inner lock when overlapping with struct_mutex. */ - struct mutex stolen_lock; /* Protects bound_list/unbound_list and #drm_i915_gem_object.mm.link */ spinlock_t obj_lock; diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c index 7d49ea72e33f..4450b4897d59 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.c +++ b/drivers/gpu/drm/i915/intel_region_ttm.c @@ -189,11 +189,12 @@ intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem, } } -#ifdef CONFIG_DRM_I915_SELFTEST /** * intel_region_ttm_resource_alloc - Allocate memory resources from a region * @mem: The memory region, * @size: The requested size in bytes + * @start: start of allowed range + * @end: end of allowed range * @flags: Allocation flags * * This functionality is provided only for callers that need to allocate @@ -207,8 +208,9 @@ intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem, */ struct ttm_resource * intel_region_ttm_resource_alloc(struct intel_memory_region *mem, - resource_size_t offset, resource_size_t size, + u64 start, + u64 end, unsigned int flags) { struct ttm_resource_manager *man = mem->region_private; @@ -219,9 +221,9 @@ intel_region_ttm_resource_alloc(struct intel_memory_region *mem, if (flags & I915_BO_ALLOC_CONTIGUOUS) place.flags |= TTM_PL_FLAG_CONTIGUOUS; - if (offset != I915_BO_INVALID_OFFSET) { - place.fpfn = offset >> PAGE_SHIFT; - place.lpfn = place.fpfn + (size >> PAGE_SHIFT); + if (start || end) { + place.fpfn = PFN_DOWN(start); + place.lpfn = PFN_UP(end); } else if (mem->io_size && mem->io_size < mem->total) { if (flags & I915_BO_ALLOC_GPU_ONLY) { place.flags |= TTM_PL_FLAG_TOPDOWN; @@ -242,8 +244,6 @@ intel_region_ttm_resource_alloc(struct intel_memory_region *mem, return ret ? ERR_PTR(ret) : res; } -#endif - /** * intel_region_ttm_resource_free - Free a resource allocated from a resource manager * @mem: The region the resource was allocated from. @@ -261,3 +261,25 @@ void intel_region_ttm_resource_free(struct intel_memory_region *mem, man->func->free(man, res); } + +/** + * intel_region_ttm_range_busy - check whether range has any allocations + * @mem: The region to check + * @start: the start of the range to check + * @size: size of the range to check + * + * Return: true if something is alloceted within the region, false otherwise. + */ +bool intel_region_ttm_range_busy(struct intel_memory_region *mem, + u64 start, u64 size) +{ + struct ttm_resource *dummy; + + dummy = intel_region_ttm_resource_alloc(mem, size, start, start + size, + I915_BO_ALLOC_CONTIGUOUS); + if (IS_ERR(dummy)) + return true; + + intel_region_ttm_resource_free(mem, dummy); + return false; +} diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h index cf9d86dcf409..1e88472fb2ea 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.h +++ b/drivers/gpu/drm/i915/intel_region_ttm.h @@ -29,15 +29,17 @@ intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem, void intel_region_ttm_resource_free(struct intel_memory_region *mem, struct ttm_resource *res); +bool intel_region_ttm_range_busy(struct intel_memory_region *mem, + u64 start, u64 size); + int intel_region_to_ttm_type(const struct intel_memory_region *mem); struct ttm_device_funcs *i915_ttm_driver(void); -#ifdef CONFIG_DRM_I915_SELFTEST struct ttm_resource * intel_region_ttm_resource_alloc(struct intel_memory_region *mem, - resource_size_t offset, resource_size_t size, + u64 start, + u64 end, unsigned int flags); -#endif #endif /* _INTEL_REGION_TTM_H_ */ diff --git a/drivers/gpu/drm/i915/selftests/mock_region.c b/drivers/gpu/drm/i915/selftests/mock_region.c index 670557ce1024..15be2440cdb8 100644 --- a/drivers/gpu/drm/i915/selftests/mock_region.c +++ b/drivers/gpu/drm/i915/selftests/mock_region.c @@ -26,8 +26,9 @@ static int mock_region_get_pages(struct drm_i915_gem_object *obj) int err; obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region, - obj->bo_offset, obj->base.size, + obj->bo_offset, + obj->bo_offset + obj->base.size, obj->flags); if (IS_ERR(obj->mm.res)) return PTR_ERR(obj->mm.res);