From patchwork Fri Jun 8 12:55:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10454373 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 31D9B60467 for ; Fri, 8 Jun 2018 12:56:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1329D294F0 for ; Fri, 8 Jun 2018 12:56:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0812029521; Fri, 8 Jun 2018 12:56:43 +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 AF6A2294F0 for ; Fri, 8 Jun 2018 12:56:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4C2A46E0DF; Fri, 8 Jun 2018 12:56:42 +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 B27CC6E0DB for ; Fri, 8 Jun 2018 12:56:39 +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 11986108-1500050 for multiple; Fri, 08 Jun 2018 13:56:31 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Fri, 08 Jun 2018 13:56:30 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 8 Jun 2018 13:55:56 +0100 Message-Id: <20180608125602.17693-13-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180608125602.17693-1-chris@chris-wilson.co.uk> References: <20180608125602.17693-1-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 12/18] 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 edb19648a85b..79d63e16c2d4 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1911,7 +1911,8 @@ 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,