From patchwork Fri Dec 12 16:13:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Gordon X-Patchwork-Id: 5483791 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D9C5E9F1D4 for ; Fri, 12 Dec 2014 16:15:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0D6F820117 for ; Fri, 12 Dec 2014 16:15:25 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 151E220115 for ; Fri, 12 Dec 2014 16:15:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A1DEC6E9B5; Fri, 12 Dec 2014 08:15:23 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id BE9E96E9B5 for ; Fri, 12 Dec 2014 08:15:21 -0800 (PST) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP; 12 Dec 2014 08:13:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,691,1406617200"; d="scan'208";a="497860813" Received: from dsgordon-linux.isw.intel.com ([10.102.226.149]) by orsmga003.jf.intel.com with ESMTP; 12 Dec 2014 08:09:24 -0800 From: Dave Gordon To: intel-gfx@lists.freedesktop.org Date: Fri, 12 Dec 2014 16:13:01 +0000 Message-Id: <1418400783-5524-2-git-send-email-david.s.gordon@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1418400783-5524-1-git-send-email-david.s.gordon@intel.com> References: <1418400783-5524-1-git-send-email-david.s.gordon@intel.com> Subject: [Intel-gfx] [PATCH 1/3] drm/i915: use effective_size for ringbuffer calculations X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 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-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When calculating the available space in a ringbuffer, we should use the effective_size rather than the true size of the ring. Signed-off-by: Dave Gordon --- drivers/gpu/drm/i915/intel_lrc.c | 2 +- drivers/gpu/drm/i915/intel_ringbuffer.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index a82020e..8545dbd 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -942,7 +942,7 @@ static int logical_ring_wait_request(struct intel_ringbuffer *ringbuf, /* Would completion of this request free enough space? */ if (__intel_ring_space(request->tail, ringbuf->tail, - ringbuf->size) >= bytes) { + ringbuf->effective_size) >= bytes) { break; } } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 83accb7..9def83c 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -66,7 +66,8 @@ void intel_ring_update_space(struct intel_ringbuffer *ringbuf) } ringbuf->space = __intel_ring_space(ringbuf->head & HEAD_ADDR, - ringbuf->tail, ringbuf->size); + ringbuf->tail, + ringbuf->effective_size); } int intel_ring_space(struct intel_ringbuffer *ringbuf) @@ -1912,7 +1913,7 @@ static int intel_ring_wait_request(struct intel_engine_cs *ring, int n) list_for_each_entry(request, &ring->request_list, list) { if (__intel_ring_space(request->tail, ringbuf->tail, - ringbuf->size) >= n) { + ringbuf->effective_size) >= n) { break; } }