From patchwork Sat May 5 10:55:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10382117 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 AEB5B60159 for ; Sat, 5 May 2018 10:56:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8CF152952D for ; Sat, 5 May 2018 10:56:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E33829531; Sat, 5 May 2018 10:56:04 +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 AFB462952D for ; Sat, 5 May 2018 10:56:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0B5196E143; Sat, 5 May 2018 10:56:02 +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 980AD6E129; Sat, 5 May 2018 10:55:59 +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 11607058-1500050 for multiple; Sat, 05 May 2018 11:55:51 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Sat, 05 May 2018 11:55:50 +0100 From: Chris Wilson To: dri-devel@lists.freedesktop.org Date: Sat, 5 May 2018 11:55:49 +0100 Message-Id: <20180505105549.14351-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.0 X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [PATCH] drm/syncobj: Use dma_fence_wait for the simple wait case 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: , Cc: intel-gfx@lists.freedesktop.org MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP When waiting for a single fence beneath a syncobj, forgo our open coding for waiting over multiple fences and call the driver specific dma_fence_wait_timeout(). This gives the opportunity for the driver to handle it more efficiently then the lcd of signal callbacks, and avoids the temporary allocations and array iterations. Signed-off-by: Chris Wilson Reviewed-by: Daniel Vetter --- drivers/gpu/drm/drm_syncobj.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index d4f4ce484529..c0f787f7a298 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -695,6 +695,14 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, signed long ret; uint32_t signaled_count, i; + /* KISS for the common case of waiting for a single submitted fence. */ + if (count == 1 && (fence = drm_syncobj_fence_get(syncobjs[0]))) { + ret = dma_fence_wait_timeout(fence, true, timeout); + dma_fence_put(fence); + *idx = 0; + return ret; + } + entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); if (!entries) return -ENOMEM;