From patchwork Fri Jun 11 14:54:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Hellstrom X-Patchwork-Id: 12315873 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21D06C48BE8 for ; Fri, 11 Jun 2021 14:55:24 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E55DE613D0 for ; Fri, 11 Jun 2021 14:55:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E55DE613D0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A3B5F6EEA0; Fri, 11 Jun 2021 14:55:21 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id C8B146EE9E; Fri, 11 Jun 2021 14:55:18 +0000 (UTC) IronPort-SDR: DGCoJfru9O0uSyxnxYwhYxpcEEtOcbd/4tzC7lvySm+fxD/Pfi0qip2qyQnslLg0vSnKFkoSRg dZKohbyd3QvQ== X-IronPort-AV: E=McAfee;i="6200,9189,10012"; a="205355258" X-IronPort-AV: E=Sophos;i="5.83,265,1616482800"; d="scan'208";a="205355258" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2021 07:55:18 -0700 IronPort-SDR: QSEBlbmSp4T3a5V/ljLLWHYPxBlY7AZIMiHvN2tCjuy++urUsiBOeqhkrMVhYfotMeUVghQiOq 6uCaZI0R6TxQ== X-IronPort-AV: E=Sophos;i="5.83,265,1616482800"; d="scan'208";a="450783217" Received: from delmer-mobl.ger.corp.intel.com (HELO thellst-mobl1.intel.com) ([10.249.254.23]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2021 07:55:17 -0700 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v2 2/4] drm/i915/ttm: Adjust gem flags and caching settings after a move Date: Fri, 11 Jun 2021 16:54:57 +0200 Message-Id: <20210611145459.8576-3-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210611145459.8576-1-thomas.hellstrom@linux.intel.com> References: <20210611145459.8576-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Thomas_Hellstr=C3=B6m?= Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" After a TTM move we need to update the i915 gem flags and caching settings to reflect the new placement. Also introduce gpu_binds_iomem() and cpu_maps_iomem() to clean up the various ways we previously used to detect this. Finally, initialize the TTM object reserved to be able to update flags and caching before anyone else gets hold of the object. Signed-off-by: Thomas Hellström --- v2: - Style fixes (Reported by Matthew Auld) --- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 112 +++++++++++++++++++----- 1 file changed, 90 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 33ab47f1e05b..45ef1d101937 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -70,6 +70,17 @@ static struct ttm_placement i915_sys_placement = { .busy_placement = &lmem0_sys_placement_flags[1], }; +static bool gpu_binds_iomem(struct ttm_resource *mem) +{ + return mem->mem_type != TTM_PL_SYSTEM; +} + +static bool cpu_maps_iomem(struct ttm_resource *mem) +{ + /* Once / if we support GGTT, this is also false for cached ttm_tts */ + return mem->mem_type != TTM_PL_SYSTEM; +} + static void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj); static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, @@ -175,6 +186,41 @@ static void i915_ttm_free_cached_io_st(struct drm_i915_gem_object *obj) obj->ttm.cached_io_st = NULL; } +static void +i915_ttm_adjust_domains_after_cpu_move(struct drm_i915_gem_object *obj) +{ + struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); + + if (cpu_maps_iomem(bo->resource) || bo->ttm->caching != ttm_cached) { + obj->write_domain = I915_GEM_DOMAIN_WC; + obj->read_domains = I915_GEM_DOMAIN_WC; + } else { + obj->write_domain = I915_GEM_DOMAIN_CPU; + obj->read_domains = I915_GEM_DOMAIN_CPU; + } +} + +static void i915_ttm_adjust_gem_after_move(struct drm_i915_gem_object *obj) +{ + struct drm_i915_private *i915 = to_i915(obj->base.dev); + struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); + unsigned int cache_level; + + obj->mem_flags &= ~(I915_BO_FLAG_STRUCT_PAGE | I915_BO_FLAG_IOMEM); + + obj->mem_flags |= cpu_maps_iomem(bo->resource) ? I915_BO_FLAG_IOMEM : + I915_BO_FLAG_STRUCT_PAGE; + + if ((HAS_LLC(i915) || HAS_SNOOP(i915)) && !gpu_binds_iomem(bo->resource) && + bo->ttm->caching == ttm_cached) { + cache_level = I915_CACHE_LLC; + } else { + cache_level = I915_CACHE_NONE; + } + + i915_gem_object_set_cache_coherency(obj, cache_level); +} + static void i915_ttm_purge(struct drm_i915_gem_object *obj) { struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); @@ -190,8 +236,10 @@ static void i915_ttm_purge(struct drm_i915_gem_object *obj) /* TTM's purge interface. Note that we might be reentering. */ ret = ttm_bo_validate(bo, &place, &ctx); - if (!ret) { + obj->write_domain = 0; + obj->read_domains = 0; + i915_ttm_adjust_gem_after_move(obj); i915_ttm_free_cached_io_st(obj); obj->mm.madv = __I915_MADV_PURGED; } @@ -273,12 +321,15 @@ i915_ttm_resource_get_st(struct drm_i915_gem_object *obj, struct ttm_resource *res) { struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); - struct ttm_resource_manager *man = - ttm_manager_type(bo->bdev, res->mem_type); - if (man->use_tt) + if (!gpu_binds_iomem(res)) return i915_ttm_tt_get_st(bo->ttm); + /* + * If CPU mapping differs, we need to add the ttm_tt pages to + * the resulting st. Might make sense for GGTT. + */ + GEM_WARN_ON(!cpu_maps_iomem(res)); return intel_region_ttm_node_to_st(obj->mm.region, res); } @@ -290,8 +341,6 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict, struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo); struct ttm_resource_manager *dst_man = ttm_manager_type(bo->bdev, dst_mem->mem_type); - struct ttm_resource_manager *src_man = - ttm_manager_type(bo->bdev, bo->resource->mem_type); struct intel_memory_region *dst_reg, *src_reg; union { struct ttm_kmap_iter_tt tt; @@ -332,34 +381,36 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict, if (IS_ERR(dst_st)) return PTR_ERR(dst_st); - /* If we start mapping GGTT, we can no longer use man::use_tt here. */ - dst_iter = dst_man->use_tt ? + dst_iter = !cpu_maps_iomem(dst_mem) ? ttm_kmap_iter_tt_init(&_dst_iter.tt, bo->ttm) : ttm_kmap_iter_iomap_init(&_dst_iter.io, &dst_reg->iomap, dst_st, dst_reg->region.start); - src_iter = src_man->use_tt ? + src_iter = !cpu_maps_iomem(bo->resource) ? ttm_kmap_iter_tt_init(&_src_iter.tt, bo->ttm) : ttm_kmap_iter_iomap_init(&_src_iter.io, &src_reg->iomap, obj->ttm.cached_io_st, src_reg->region.start); ttm_move_memcpy(bo, dst_mem->num_pages, dst_iter, src_iter); + /* Below dst_mem becomes bo->resource. */ ttm_bo_move_sync_cleanup(bo, dst_mem); + i915_ttm_adjust_domains_after_cpu_move(obj); i915_ttm_free_cached_io_st(obj); - if (!dst_man->use_tt) { + if (gpu_binds_iomem(dst_mem) || cpu_maps_iomem(dst_mem)) { obj->ttm.cached_io_st = dst_st; obj->ttm.get_io_page.sg_pos = dst_st->sgl; obj->ttm.get_io_page.sg_idx = 0; } + i915_ttm_adjust_gem_after_move(obj); return 0; } static int i915_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem) { - if (mem->mem_type < I915_PL_LMEM0) + if (!cpu_maps_iomem(mem)) return 0; mem->bus.caching = ttm_write_combined; @@ -421,6 +472,16 @@ static int i915_ttm_get_pages(struct drm_i915_gem_object *obj) if (ret) return ret == -ENOSPC ? -ENXIO : ret; + i915_ttm_adjust_lru(obj); + if (bo->ttm && !ttm_tt_is_populated(bo->ttm)) { + ret = ttm_tt_populate(bo->bdev, bo->ttm, &ctx); + if (ret) + return ret; + + i915_ttm_adjust_domains_after_cpu_move(obj); + i915_ttm_adjust_gem_after_move(obj); + } + /* Object either has a page vector or is an iomem object */ st = bo->ttm ? i915_ttm_tt_get_st(bo->ttm) : obj->ttm.cached_io_st; if (IS_ERR(st)) @@ -428,8 +489,6 @@ static int i915_ttm_get_pages(struct drm_i915_gem_object *obj) __i915_gem_object_set_pages(obj, st, i915_sg_dma_sizes(st->sgl)); - i915_ttm_adjust_lru(obj); - return ret; } @@ -563,6 +622,7 @@ static u64 i915_ttm_mmap_offset(struct drm_i915_gem_object *obj) const struct drm_i915_gem_object_ops i915_gem_ttm_obj_ops = { .name = "i915_gem_object_ttm", + .flags = I915_GEM_OBJECT_IS_SHRINKABLE, .get_pages = i915_ttm_get_pages, .put_pages = i915_ttm_put_pages, @@ -599,6 +659,10 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, { static struct lock_class_key lock_class; struct drm_i915_private *i915 = mem->i915; + struct ttm_operation_ctx ctx = { + .interruptible = true, + .no_wait_gpu = false, + }; enum ttm_bo_type bo_type; size_t alignment = 0; int ret; @@ -618,15 +682,14 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, i915_gem_object_init(obj, &i915_gem_ttm_obj_ops, &lock_class, flags); i915_gem_object_init_memory_region(obj, mem); i915_gem_object_make_unshrinkable(obj); - obj->read_domains = I915_GEM_DOMAIN_WC | I915_GEM_DOMAIN_GTT; - obj->mem_flags |= I915_BO_FLAG_IOMEM; - i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); INIT_RADIX_TREE(&obj->ttm.get_io_page.radix, GFP_KERNEL | __GFP_NOWARN); mutex_init(&obj->ttm.get_io_page.lock); bo_type = (obj->flags & I915_BO_ALLOC_USER) ? ttm_bo_type_device : ttm_bo_type_kernel; + obj->base.vma_node.driver_private = i915_gem_to_ttm(obj); + /* * If this function fails, it will call the destructor, but * our caller still owns the object. So no freeing in the @@ -634,14 +697,19 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, * Similarly, in delayed_destroy, we can't call ttm_bo_put() * until successful initialization. */ - obj->base.vma_node.driver_private = i915_gem_to_ttm(obj); - ret = ttm_bo_init(&i915->bdev, i915_gem_to_ttm(obj), size, - bo_type, &i915_sys_placement, alignment, - true, NULL, NULL, i915_ttm_bo_destroy); + ret = ttm_bo_init_reserved(&i915->bdev, i915_gem_to_ttm(obj), size, + bo_type, &i915_sys_placement, alignment, + &ctx, NULL, NULL, i915_ttm_bo_destroy); + + if (ret) + goto out; - if (!ret) - obj->ttm.created = true; + obj->ttm.created = true; + i915_ttm_adjust_domains_after_cpu_move(obj); + i915_ttm_adjust_gem_after_move(obj); + i915_gem_object_unlock(obj); +out: /* i915 wants -ENXIO when out of memory region space. */ return (ret == -ENOSPC) ? -ENXIO : ret; }