From patchwork Tue Apr 12 15:18:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bob Beckett X-Patchwork-Id: 12810877 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 636FEC433EF for ; Tue, 12 Apr 2022 15:19:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6DD7B10E59E; Tue, 12 Apr 2022 15:19:03 +0000 (UTC) Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 96B2910E1FA; Tue, 12 Apr 2022 15:19:01 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: bbeckett) with ESMTPSA id 136471F4490B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1649776740; bh=W1xeNHFFi2xCQW+DSKNFK1fRoffazm4NeTwtpFvqJkc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X03m9d2Sp82m013ENOFCLFQ9Tp7SBFVel+ym0BVJ9cugTl+tH77FALhp1/yDdb90i +xAiBa++y1r1LOZOszpwFGjeOI/FSlJPNCELVfTfrMJtYs0K/gDenxNfC/VMsZL14q I6JF8wtDuwFrlfN8bdOKKUoPO8ZgNyN/8a2cfzBxPjsk6KOQO3mJE/MKWq8npRM4lk SD6E771QA7gNLYQFvnAocxjqtiZqXud5xwclTYkc+xh/89qmxPTQNf2wEEddYYoefv smmuW3CWDnqBxLvLcgcG9sYX3heTP/+HTbxofeMRrXnuID2R4DD9efFW4Dw7Wk97lp RfT85FUnrfP3g== 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: Tue, 12 Apr 2022 15:18:36 +0000 Message-Id: <20220412151838.1298956-4-bob.beckett@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220412151838.1298956-1-bob.beckett@collabora.com> References: <20220412151838.1298956-1-bob.beckett@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 3/5] drm/i915: ttm move/clear logic fix 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" ttm managed buffers start off with system resource definitions and ttm_tt tracking structures allocated (though unpopulated). currently this prevents clearing of buffers on first move to desired placements. The desired behaviour is to clear user allocated buffers and any kernel buffers that specifically requests it only. Make the logic match the desired behaviour. Signed-off-by: Robert Beckett Reviewed-by: Thomas Hellström --- drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c | 22 +++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c index 9fe8132de3b2..9cf85f91edb5 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c @@ -3,6 +3,7 @@ * Copyright © 2021 Intel Corporation */ +#include "drm/ttm/ttm_tt.h" #include #include "i915_deps.h" @@ -470,6 +471,25 @@ __i915_ttm_move(struct ttm_buffer_object *bo, return fence; } +static bool +allow_clear(struct drm_i915_gem_object *obj, struct ttm_tt *ttm, struct ttm_resource *dst_mem) +{ + /* never clear stolen */ + if (dst_mem->mem_type == I915_PL_STOLEN) + return false; + /* + * we want to clear user buffers and any kernel buffers + * that specifically request clearing. + */ + if (obj->flags & I915_BO_ALLOC_USER) + return true; + + if (ttm && ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC) + return true; + + return false; +} + /** * i915_ttm_move - The TTM move callback used by i915. * @bo: The buffer object. @@ -520,7 +540,7 @@ int i915_ttm_move(struct ttm_buffer_object *bo, bool evict, return PTR_ERR(dst_rsgt); clear = !i915_ttm_cpu_maps_iomem(bo->resource) && (!ttm || !ttm_tt_is_populated(ttm)); - if (!(clear && ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))) { + if (!clear || allow_clear(obj, ttm, dst_mem)) { struct i915_deps deps; i915_deps_init(&deps, GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN);