From patchwork Mon Jun 14 11:54:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Hellstrom X-Patchwork-Id: 12318787 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,URIBL_BLOCKED,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 041DDC48BE6 for ; Mon, 14 Jun 2021 11:54:31 +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 C930861107 for ; Mon, 14 Jun 2021 11:54:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C930861107 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=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C561A89D4B; Mon, 14 Jun 2021 11:54:24 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 13A7389D56; Mon, 14 Jun 2021 11:54:23 +0000 (UTC) IronPort-SDR: qM7iBEH4D4r9OBUdR4LxTHomA53d0ebDk1tUGmtBstNGkaWsE3TvZbdW3uw9mXZPKfHTkumJPX VGZgoNR8tJhg== X-IronPort-AV: E=McAfee;i="6200,9189,10014"; a="185490616" X-IronPort-AV: E=Sophos;i="5.83,273,1616482800"; d="scan'208";a="185490616" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2021 04:54:22 -0700 IronPort-SDR: lCYdhFYHGx6Ss5eEr42Wr+ftEgWAGwFlTodaJhTHJhc9S9+dOZnw8A0OheogODyiCkdMrPvPdf uCPYDboFbcgA== X-IronPort-AV: E=Sophos;i="5.83,273,1616482800"; d="scan'208";a="451570255" Received: from janlundk-mobl1.ger.corp.intel.com (HELO thellst-mobl1.intel.com) ([10.249.254.32]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2021 04:54:20 -0700 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 14 Jun 2021 13:54:05 +0200 Message-Id: <20210614115406.153107-4-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210614115406.153107-1-thomas.hellstrom@linux.intel.com> References: <20210614115406.153107-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 3/4] drm/i915/ttm: Calculate the object placement at get_pages time 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@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Instead of relying on a static placement, calculate at get_pages() time. This should work for LMEM regions and system for now. For stolen we need to take preallocated range into account. That will if needed be added later. Signed-off-by: Thomas Hellström Reviewed-by: Matthew Auld --- v2: - Fixed a style issue (Reported by Matthew Auld) v3: - Make sure we don't add more placements to the stack-allocated vector than there is room for. (Reported by Matthew Auld) v4: - Remove confusion around shrinkable objects (Reported by Matthew Auld) --- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 95 ++++++++++++++++++------- drivers/gpu/drm/i915/intel_region_ttm.c | 8 ++- drivers/gpu/drm/i915/intel_region_ttm.h | 2 + 3 files changed, 77 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 5176682a7d19..1c45f9c87946 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -24,6 +24,11 @@ #define I915_TTM_PRIO_NO_PAGES 1 #define I915_TTM_PRIO_HAS_PAGES 2 +/* + * Size of struct ttm_place vector in on-stack struct ttm_placement allocs + */ +#define I915_TTM_MAX_PLACEMENTS INTEL_REGION_UNKNOWN + /** * struct i915_ttm_tt - TTM page vector with additional private information * @ttm: The base TTM page vector. @@ -42,32 +47,18 @@ struct i915_ttm_tt { struct sg_table *cached_st; }; -static const struct ttm_place lmem0_sys_placement_flags[] = { - { - .fpfn = 0, - .lpfn = 0, - .mem_type = I915_PL_LMEM0, - .flags = 0, - }, { - .fpfn = 0, - .lpfn = 0, - .mem_type = I915_PL_SYSTEM, - .flags = 0, - } -}; - -static struct ttm_placement i915_lmem0_placement = { - .num_placement = 1, - .placement = &lmem0_sys_placement_flags[0], - .num_busy_placement = 1, - .busy_placement = &lmem0_sys_placement_flags[0], +static const struct ttm_place sys_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = I915_PL_SYSTEM, + .flags = 0, }; static struct ttm_placement i915_sys_placement = { .num_placement = 1, - .placement = &lmem0_sys_placement_flags[1], + .placement = &sys_placement_flags, .num_busy_placement = 1, - .busy_placement = &lmem0_sys_placement_flags[1], + .busy_placement = &sys_placement_flags, }; static bool gpu_binds_iomem(struct ttm_resource *mem) @@ -83,6 +74,55 @@ static bool cpu_maps_iomem(struct ttm_resource *mem) static void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj); +static enum ttm_caching +i915_ttm_select_tt_caching(const struct drm_i915_gem_object *obj) +{ + /* + * Objects only allowed in system get cached cpu-mappings. + * Other objects get WC mapping for now. Even if in system. + */ + if (obj->mm.region->type == INTEL_MEMORY_SYSTEM && + obj->mm.n_placements <= 1) + return ttm_cached; + + return ttm_write_combined; +} + +static void +i915_ttm_place_from_region(const struct intel_memory_region *mr, + struct ttm_place *place) +{ + memset(place, 0, sizeof(*place)); + place->mem_type = intel_region_to_ttm_type(mr); +} + +static void +i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj, + struct ttm_place *requested, + struct ttm_place *busy, + struct ttm_placement *placement) +{ + unsigned int num_allowed = obj->mm.n_placements; + unsigned int i; + + placement->num_placement = 1; + i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] : + obj->mm.region, requested); + + /* Cache this on object? */ + placement->num_busy_placement = num_allowed; + for (i = 0; i < placement->num_busy_placement; ++i) + i915_ttm_place_from_region(obj->mm.placements[i], busy + i); + + if (num_allowed == 0) { + *busy = *requested; + placement->num_busy_placement = 1; + } + + placement->placement = requested; + placement->busy_placement = busy; +} + static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags) { @@ -100,7 +140,8 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, man->use_tt) page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; - ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, ttm_write_combined); + ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, + i915_ttm_select_tt_caching(obj)); if (ret) { kfree(i915_tt); return NULL; @@ -464,10 +505,15 @@ static int i915_ttm_get_pages(struct drm_i915_gem_object *obj) .no_wait_gpu = false, }; struct sg_table *st; + struct ttm_place requested, busy[I915_TTM_MAX_PLACEMENTS]; + struct ttm_placement placement; int ret; + GEM_BUG_ON(obj->mm.n_placements > I915_TTM_MAX_PLACEMENTS); + /* Move to the requested placement. */ - ret = ttm_bo_validate(bo, &i915_lmem0_placement, &ctx); + i915_ttm_placement_from_obj(obj, &requested, busy, &placement); + ret = ttm_bo_validate(bo, &placement, &ctx); if (ret) return ret == -ENOSPC ? -ENXIO : ret; @@ -621,7 +667,6 @@ 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, @@ -683,7 +728,6 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, i915_gem_object_make_unshrinkable(obj); 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; @@ -707,7 +751,6 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, 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; diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c index 27fe0668d094..5a664f6cc93f 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.c +++ b/drivers/gpu/drm/i915/intel_region_ttm.c @@ -50,12 +50,16 @@ void intel_region_ttm_device_fini(struct drm_i915_private *dev_priv) * driver-private types for now, reserving TTM_PL_VRAM for stolen * memory and TTM_PL_TT for GGTT use if decided to implement this. */ -static int intel_region_to_ttm_type(struct intel_memory_region *mem) +int intel_region_to_ttm_type(const struct intel_memory_region *mem) { int type; GEM_BUG_ON(mem->type != INTEL_MEMORY_LOCAL && - mem->type != INTEL_MEMORY_MOCK); + mem->type != INTEL_MEMORY_MOCK && + mem->type != INTEL_MEMORY_SYSTEM); + + if (mem->type == INTEL_MEMORY_SYSTEM) + return TTM_PL_SYSTEM; type = mem->instance + TTM_PL_PRIV; GEM_BUG_ON(type >= TTM_NUM_MEM_TYPES); diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h index e8cf830fda6f..649491844e79 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.h +++ b/drivers/gpu/drm/i915/intel_region_ttm.h @@ -28,6 +28,8 @@ struct sg_table *intel_region_ttm_node_to_st(struct intel_memory_region *mem, void intel_region_ttm_node_free(struct intel_memory_region *mem, struct ttm_resource *node); +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