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 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 332D3C3DA4A for ; Thu, 22 Aug 2024 17:42:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 046A310EBA5; Thu, 22 Aug 2024 17:42:08 +0000 (UTC) Received: from mblankhorst.nl (lankhorst.se [141.105.120.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id A47BD10EBA4 for ; Thu, 22 Aug 2024 17:42:06 +0000 (UTC) From: Maarten Lankhorst To: intel-xe@lists.freedesktop.org Cc: Maarten Lankhorst , =?UTF-8?q?Zbigniew=20Kempczy=C5=84ski?= , Matthew Auld , Rodrigo Vivi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , =?UTF-8?q?Juha-Pekka=20Heikkil=C3=A4?= Subject: [PATCH v4] drm/xe: Align all VRAM scanout buffers to 64k physical pages when needed. Date: Thu, 22 Aug 2024 19:42:02 +0200 Message-ID: <20240822174202.827626-1-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" For CCS formats on affected platforms, CCS can be used freely, but display engine requires a multiple of 64k physical pages. No other changes are needed. At the BO creation time we don't know if the BO will be used for CCS or not. If the scanout flag is set, and the BO is a multiple of 64k, we take the safe route and force the physical alignment of 64k pages. If the BO is not a multiple of 64k, or the scanout flag was not set at BO creation, we reject it for usage as CCS in display. The physical pages are likely not aligned correctly, and this will cause corruption when used as FB. This is a slightly different approach from my previous patch. Instead of requiring a scanout flag at FB creation, we now make all buffers of the right size physically aligned correctly, so no change from userspace is needed. Inspired by Zbigniews patch. Signed-off-by: Maarten Lankhorst Co-developed-by: Zbigniew Kempczyński Cc: Matthew Auld Cc: Rodrigo Vivi Cc: Thomas Hellström Cc: Maarten Lankhorst Cc: Juha-Pekka Heikkilä --- drivers/gpu/drm/xe/display/intel_fb_bo.c | 5 +++++ drivers/gpu/drm/xe/xe_bo.c | 7 +++++++ drivers/gpu/drm/xe/xe_vm.c | 3 ++- 3 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/display/intel_fb_bo.c b/drivers/gpu/drm/xe/display/intel_fb_bo.c index f835492f73fb4..6775c2557b9df 100644 --- a/drivers/gpu/drm/xe/display/intel_fb_bo.c +++ b/drivers/gpu/drm/xe/display/intel_fb_bo.c @@ -28,6 +28,11 @@ int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb, struct xe_device *xe = to_xe_device(bo->ttm.base.dev); int ret; + /* Only this specific format is affected, and it's only available on VRAM */ + if (XE_IOCTL_DBG(xe, mode_cmd->modifier[0] == I915_FORMAT_MOD_4_TILED_BMG_CCS && + !(bo->flags & XE_BO_FLAG_NEEDS_64K))) + return -EINVAL; + xe_bo_get(bo); ret = ttm_bo_reserve(&bo->ttm, true, false, NULL); diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c index 6ed0e19552159..a7f48d971f4cf 100644 --- a/drivers/gpu/drm/xe/xe_bo.c +++ b/drivers/gpu/drm/xe/xe_bo.c @@ -2019,6 +2019,13 @@ int xe_gem_create_ioctl(struct drm_device *dev, void *data, bo_flags |= args->placement << (ffs(XE_BO_FLAG_SYSTEM) - 1); + /* CCS formats need physical placement at a 64K alignment in VRAM. */ + if ((bo_flags & XE_BO_FLAG_VRAM_MASK) && + (bo_flags & XE_BO_FLAG_SCANOUT) && + !(xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K) && + !(args->size % SZ_64K)) + bo_flags |= XE_BO_FLAG_NEEDS_64K; + if (args->flags & DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM) { if (XE_IOCTL_DBG(xe, !(bo_flags & XE_BO_FLAG_VRAM_MASK))) return -EINVAL; diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index d1bfd0b6e9558..af215f6d6588b 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -2878,7 +2878,8 @@ static int xe_vm_bind_ioctl_validate_bo(struct xe_device *xe, struct xe_bo *bo, return -EINVAL; } - if (bo->flags & XE_BO_FLAG_INTERNAL_64K) { + if ((bo->flags & XE_BO_FLAG_INTERNAL_64K) && + (xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K)) { if (XE_IOCTL_DBG(xe, obj_offset & XE_64K_PAGE_MASK) || XE_IOCTL_DBG(xe, addr & XE_64K_PAGE_MASK) || -- 2.45.2