From patchwork Thu Jun 9 16:51:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bob Beckett X-Patchwork-Id: 12875821 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 90564C433EF for ; Thu, 9 Jun 2022 16:52:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 535F611AB75; Thu, 9 Jun 2022 16:52:30 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 52FCD11AB75; Thu, 9 Jun 2022 16:52:27 +0000 (UTC) Received: from hermes-devbox.fritz.box (82-71-8-225.dsl.in-addr.zen.co.uk [82.71.8.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bbeckett) by madras.collabora.co.uk (Postfix) with ESMTPSA id CD5A666017BA; Thu, 9 Jun 2022 17:52:25 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1654793546; bh=fNrnNmjm8O3impsJ3FwNrPFJIw42pnJblFgr2kI6zEE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EpKGah8MRwcPqjQ95aCfc7Oks1XrRyNlKgTrhFsuhUw2s3yzaRTIoYsy++VgRqvQ5 Oy/gXuwzxwXXFaonnGDftHH9qzCXCKjtF/MEMtxP/q7xQw0howdNcAsAVCn3P5hKYQ Kbc/xg4zKL+o1MMWxLTFRpwbLg/0h7jua9peemWb5Bt7Po3wzD8Zg/QJk8f53P5sD6 ePj1vstZNyUg69igFYvoFsjGWRxMpGCvpoK1EZZwhk6myvgmc6GD+SBuFVTr4NgYqF ElfEg472OJdCcPK0tbEWwiQtU2I/u411NrTuCAXGhbk0Qckeh6POMRbPN0yY/KPU1M cn3s2ysIC8RwQ== 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 Subject: [PATCH v3 4/8] drm/i915: allow volatile buffers to use ttm pool allocator Date: Thu, 9 Jun 2022 16:51:56 +0000 Message-Id: <20220609165200.842821-5-bob.beckett@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220609165200.842821-1-bob.beckett@collabora.com> References: <20220609165200.842821-1-bob.beckett@collabora.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: Robert Beckett , =?utf-8?q?Thomas_Hellstr?= =?utf-8?q?=C3=B6m?= , kernel@collabora.com, Matthew Auld , linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Internal/volatile buffers should not be shmem backed. If a volatile buffer is requested, allow ttm to use the pool allocator to provide volatile pages as backing. Fix i915_ttm_shrink to handle !is_shmem volatile buffers by purging. Signed-off-by: Robert Beckett --- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 27d59639177f..8edce04a0509 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -309,7 +309,8 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, page_flags |= TTM_TT_FLAG_ZERO_ALLOC; caching = i915_ttm_select_tt_caching(obj); - if (i915_gem_object_is_shrinkable(obj) && caching == ttm_cached) { + if (i915_gem_object_is_shrinkable(obj) && caching == ttm_cached && + !i915_gem_object_is_volatile(obj)) { page_flags |= TTM_TT_FLAG_EXTERNAL | TTM_TT_FLAG_EXTERNAL_MAPPABLE; i915_tt->is_shmem = true; @@ -531,9 +532,9 @@ static int i915_ttm_shrink(struct drm_i915_gem_object *obj, unsigned int flags) if (!bo->ttm || bo->resource->mem_type != TTM_PL_SYSTEM) return 0; - GEM_BUG_ON(!i915_tt->is_shmem); + GEM_BUG_ON(!i915_tt->is_shmem && obj->mm.madv != I915_MADV_DONTNEED); - if (!i915_tt->filp) + if (i915_tt->is_shmem && !i915_tt->filp) return 0; ret = ttm_bo_wait_ctx(bo, &ctx);