From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F390BC63797 for ; Wed, 4 Jan 2023 16:26:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239849AbjADQ0F (ORCPT ); Wed, 4 Jan 2023 11:26:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240006AbjADQZT (ORCPT ); Wed, 4 Jan 2023 11:25:19 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A53C53D1D3 for ; Wed, 4 Jan 2023 08:24:57 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 54684B81731 for ; Wed, 4 Jan 2023 16:24:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A56FCC433D2; Wed, 4 Jan 2023 16:24:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672849495; bh=MvVGUDtIvMOh7+1YcCiSwII4EajhyZTlwB/AJsib72o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FE5odK3m72meSBrGTYUvf2SR9HEmjcLfJkD78exWOxTT8ywdauXriGhuzLHRbG5FR /NGxtcZ/gUPc8RhsanlfBcfTcyIQ69dfoZ1d4ENxOEhCjJjnJupS1J6OLpjMyevyrV 4fAR+Eoi4FwrIow3x1zQheT9SXXtyVNyCtWkl+gw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthew Auld , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Nirmoy Das , Andrzej Hajda , Shuicheng Lin , Rodrigo Vivi Subject: [PATCH 6.1 198/207] drm/i915/ttm: consider CCS for backup objects Date: Wed, 4 Jan 2023 17:07:36 +0100 Message-Id: <20230104160518.187897439@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160511.905925875@linuxfoundation.org> References: <20230104160511.905925875@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Matthew Auld commit ad0fca2dceeab8fdd8e1135f4b4ef2dc46c2ead9 upstream. It seems we can have one or more framebuffers that are still pinned when suspending lmem, in such a case we end up creating a shmem backup object, instead of evicting the object directly, but this will skip copying the CCS aux state, since we don't allocate the extra storage for the CCS pages as part of the ttm_tt construction. Since we can already deal with pinned objects just fine, it doesn't seem too nasty to just extend to support dealing with the CCS aux state, if the object is a pinned framebuffer. This fixes display corruption (like in gnome-shell) seen on DG2 when returning from suspend. Fixes: da0595ae91da ("drm/i915/migrate: Evict and restore the flatccs capable lmem obj") Signed-off-by: Matthew Auld Cc: Ville Syrjälä Cc: Nirmoy Das Cc: Andrzej Hajda Cc: Shuicheng Lin Cc: # v5.19+ Tested-by: Nirmoy Das Reviewed-by: Nirmoy Das Link: https://patchwork.freedesktop.org/patch/msgid/20221212171958.82593-2-matthew.auld@intel.com (cherry picked from commit 95df9cc24bee8a09d39c62bcef4319b984814e18) Signed-off-by: Rodrigo Vivi Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/gem/i915_gem_object.c | 3 +++ drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 10 ++++++---- drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c | 18 +++++++++++++++++- 3 files changed, 26 insertions(+), 5 deletions(-) --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -761,6 +761,9 @@ bool i915_gem_object_needs_ccs_pages(str if (!HAS_FLAT_CCS(to_i915(obj->base.dev))) return false; + if (obj->flags & I915_BO_ALLOC_CCS_AUX) + return true; + for (i = 0; i < obj->mm.n_placements; i++) { /* Compression is not allowed for the objects with smem placement */ if (obj->mm.placements[i]->type == INTEL_MEMORY_SYSTEM) --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -327,16 +327,18 @@ struct drm_i915_gem_object { * dealing with userspace objects the CPU fault handler is free to ignore this. */ #define I915_BO_ALLOC_GPU_ONLY BIT(6) +#define I915_BO_ALLOC_CCS_AUX BIT(7) #define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | \ I915_BO_ALLOC_VOLATILE | \ I915_BO_ALLOC_CPU_CLEAR | \ I915_BO_ALLOC_USER | \ I915_BO_ALLOC_PM_VOLATILE | \ I915_BO_ALLOC_PM_EARLY | \ - I915_BO_ALLOC_GPU_ONLY) -#define I915_BO_READONLY BIT(7) -#define I915_TILING_QUIRK_BIT 8 /* unknown swizzling; do not release! */ -#define I915_BO_PROTECTED BIT(9) + I915_BO_ALLOC_GPU_ONLY | \ + I915_BO_ALLOC_CCS_AUX) +#define I915_BO_READONLY BIT(8) +#define I915_TILING_QUIRK_BIT 9 /* unknown swizzling; do not release! */ +#define I915_BO_PROTECTED BIT(10) /** * @mem_flags - Mutable placement-related flags * --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c @@ -50,6 +50,7 @@ static int i915_ttm_backup(struct i915_g container_of(bo->bdev, typeof(*i915), bdev); struct drm_i915_gem_object *backup; struct ttm_operation_ctx ctx = {}; + unsigned int flags; int err = 0; if (bo->resource->mem_type == I915_PL_SYSTEM || obj->ttm.backup) @@ -65,7 +66,22 @@ static int i915_ttm_backup(struct i915_g if (obj->flags & I915_BO_ALLOC_PM_VOLATILE) return 0; - backup = i915_gem_object_create_shmem(i915, obj->base.size); + /* + * It seems that we might have some framebuffers still pinned at this + * stage, but for such objects we might also need to deal with the CCS + * aux state. Make sure we force the save/restore of the CCS state, + * otherwise we might observe display corruption, when returning from + * suspend. + */ + flags = 0; + if (i915_gem_object_needs_ccs_pages(obj)) { + WARN_ON_ONCE(!i915_gem_object_is_framebuffer(obj)); + WARN_ON_ONCE(!pm_apply->allow_gpu); + + flags = I915_BO_ALLOC_CCS_AUX; + } + backup = i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_SMEM], + obj->base.size, 0, flags); if (IS_ERR(backup)) return PTR_ERR(backup);