From patchwork Fri Nov 27 15:49:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 7713921 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8BBB4C0426 for ; Fri, 27 Nov 2015 15:49:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C179220751 for ; Fri, 27 Nov 2015 15:49:10 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 4DB4120722 for ; Fri, 27 Nov 2015 15:49:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3682B8816D; Fri, 27 Nov 2015 07:49:08 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pegasos-out.vodafone.de (pegasos-out.vodafone.de [80.84.1.38]) by gabe.freedesktop.org (Postfix) with ESMTP id 667148816D for ; Fri, 27 Nov 2015 07:49:06 -0800 (PST) Received: from localhost (localhost.localdomain [127.0.0.1]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id 316814CC1A7; Fri, 27 Nov 2015 16:49:04 +0100 (CET) X-Virus-Scanned: amavisd-new at vodafone.de X-Spam-Score: 0.201 X-Spam-Level: X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, FREEMAIL_FROM,RCVD_IN_DNSWL_MED,T_DKIM_INVALID,T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Authentication-Results: rohrpostix2.prod.vfnet.de (amavisd-new); dkim=pass header.i=@vodafone.de Received: from pegasos-out.vodafone.de ([127.0.0.1]) by localhost (rohrpostix2.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 53nTrRwltGgl; Fri, 27 Nov 2015 16:49:02 +0100 (CET) Received: from smtp-02.vodafone.de (xsmail-dmz4.prod.vfnet.de [10.215.254.35]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id 1C91C4CC188; Fri, 27 Nov 2015 16:49:02 +0100 (CET) X-DKIM: OpenDKIM Filter v2.6.8 pegasos-out.vodafone.de 1C91C4CC188 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vodafone.de; s=mail; t=1448639342; bh=eiFw5+GuVyp1kTYEgswcbd8+AYwMaACBWdmsftqfc2s=; h=From:To:Cc:Subject:Date; b=1OLWi2f+rD2BZBc52xhu+F6ivcsW1FEloHrSarVG+vlFqhYq4+SnS2IAWJgD7k6ux myjQHvDZ4Xx+sAmedcXk+nwdK3CsVj1VFQsuU6bx/McCDuIR+0sAUJSHV53MzIJVYZ aMwABcX1xq1kGiCAX85tMm6hwHiDoyzGkYtZlxhk= X-Virus-Scanned: amavisd-new at vodafone.de Received: from smtp-02.vodafone.de ([127.0.0.1]) by localhost (xsmail-dmz4.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5nbFWXtweJ6s; Fri, 27 Nov 2015 16:49:01 +0100 (CET) From: =?UTF-8?q?Christian=20K=C3=B6nig?= To: alexdeucher@gmail.com Subject: [PATCH] drm/amdgpu: fix VM page table reference counting Date: Fri, 27 Nov 2015 16:49:00 +0100 Message-Id: <1448639340-5365-1-git-send-email-deathsimple@vodafone.de> X-Mailer: git-send-email 2.5.0 MIME-Version: 1.0 Cc: dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Christian König We use the reservation object of the page directory for the page tables as well, because of this the page directory should be freed last. Ensure that by keeping a reference from the page tables to the directory. Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 5 +++++ 3 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 306f757..595bb86 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -538,6 +538,7 @@ struct amdgpu_bo { /* Constant after initialization */ struct amdgpu_device *adev; struct drm_gem_object gem_base; + struct amdgpu_bo *parent; struct ttm_bo_kmap_obj dma_buf_vmap; pid_t pid; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 0d52438..c3ce103 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -100,6 +100,7 @@ static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo) list_del_init(&bo->list); mutex_unlock(&bo->adev->gem.mutex); drm_gem_object_release(&bo->gem_base); + amdgpu_bo_unref(&bo->parent); kfree(bo->metadata); kfree(bo); } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 159ce54..9acdf50 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1076,6 +1076,11 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev, if (r) goto error_free; + /* Keep a reference to the page table to avoid freeing + * them up in the wrong order. + */ + pt->parent = amdgpu_bo_ref(vm->page_directory); + r = amdgpu_vm_clear_bo(adev, pt); if (r) { amdgpu_bo_unref(&pt);