From patchwork Wed Jun 6 06:27:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10449711 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C7EE46053F for ; Wed, 6 Jun 2018 06:27:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B96F629834 for ; Wed, 6 Jun 2018 06:27:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE6932984D; Wed, 6 Jun 2018 06:27:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 777D229834 for ; Wed, 6 Jun 2018 06:27:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1CB756E514; Wed, 6 Jun 2018 06:27:55 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 85E266E542 for ; Wed, 6 Jun 2018 06:27:52 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 11956689-1500050 for multiple; Wed, 06 Jun 2018 07:27:43 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Wed, 06 Jun 2018 07:27:45 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Wed, 6 Jun 2018 07:27:05 +0100 Message-Id: <20180606062710.29984-13-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180606062710.29984-1-chris@chris-wilson.co.uk> References: <20180606062710.29984-1-chris@chris-wilson.co.uk> X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [PATCH 12/17] drm/i915/gtt: Skip initializing PT with scratch if full X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP If we will completely overwrite the PT with PTEs for the object, we can forgo filling it with scratch entries. References: 14826673247e ("drm/i915: Only initialize partially filled pagetables") Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Cc: Mika Kuoppala Cc: Matthew Auld Reviewed-by: Matthew Auld --- drivers/gpu/drm/i915/i915_gem_gtt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index bb1b26030d81..fd2e3974e688 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1901,7 +1901,8 @@ static int gen6_alloc_va_range(struct i915_address_space *vm, if (IS_ERR(pt)) goto unwind_out; - gen6_initialize_pt(vm, pt); + if (count < GEN6_PTES) + gen6_initialize_pt(vm, pt); ppgtt->base.pd.page_table[pde] = pt; if (i915_vma_is_bound(ppgtt->vma,