From patchwork Fri Jul 20 13:33:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Bartminski, Jakub" X-Patchwork-Id: 10537485 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 4F45D60547 for ; Fri, 20 Jul 2018 13:34:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 496892962D for ; Fri, 20 Jul 2018 13:34:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3D18E2963A; Fri, 20 Jul 2018 13:34:38 +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 5816A2962D for ; Fri, 20 Jul 2018 13:34:36 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B0F1E6EFCD; Fri, 20 Jul 2018 13:34:35 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 44A2D6EFCD for ; Fri, 20 Jul 2018 13:34:34 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jul 2018 06:34:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,379,1526367600"; d="scan'208";a="58093652" Received: from jbartmin-desk.igk.intel.com ([172.28.181.141]) by orsmga007.jf.intel.com with ESMTP; 20 Jul 2018 06:34:31 -0700 From: =?UTF-8?q?Jakub=20Bartmi=C5=84ski?= To: intel-gfx@lists.freedesktop.org Date: Fri, 20 Jul 2018 15:33:51 +0200 Message-Id: <20180720133355.26180-1-jakub.bartminski@intel.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 1/5] drm/i915/guc: Avoid wasting memory on incorrect GuC pin bias 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP It would appear that the calculated GuC pin bias was larger than it should be, as the GuC address space does NOT contain the "HW contexts RSVD" part of the WOPCM. Thus, the GuC pin bias is simply the GuC WOPCM size. Signed-off-by: Jakub Bartmiński Cc: Chris Wilson Cc: Michał Winiarski Cc: Michal Wajdeczko Reviewed-by: Michał Winiarski Reviewed-by: Michal Wajdeczko --- drivers/gpu/drm/i915/intel_guc.c | 50 ++++++++++++++------------------ 1 file changed, 22 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c index e12bd259df17..17753952933e 100644 --- a/drivers/gpu/drm/i915/intel_guc.c +++ b/drivers/gpu/drm/i915/intel_guc.c @@ -582,50 +582,44 @@ int intel_guc_resume(struct intel_guc *guc) * * :: * - * +==============> +====================+ <== GUC_GGTT_TOP - * ^ | | - * | | | - * | | DRAM | - * | | Memory | - * | | | - * GuC | | - * Address +========> +====================+ <== WOPCM Top - * Space ^ | HW contexts RSVD | - * | | | WOPCM | - * | | +==> +--------------------+ <== GuC WOPCM Top - * | GuC ^ | | - * | GGTT | | | - * | Pin GuC | GuC | - * | Bias WOPCM | WOPCM | - * | | Size | | - * | | | | | - * v v v | | - * +=====+=====+==> +====================+ <== GuC WOPCM Base - * | Non-GuC WOPCM | - * | (HuC/Reserved) | - * +====================+ <== WOPCM Base + * +============> +====================+ <== GUC_GGTT_TOP + * ^ | | + * | | | + * | | DRAM | + * | | Memory | + * | | | + * GuC | | + * Address +====> +====================+ <== GuC WOPCM Top + * Space ^ | | + * | | | | + * | GuC | GuC | + * | WOPCM | WOPCM | + * | Size | | + * | | | | + * v v | | + * +=======+====> +====================+ <== GuC WOPCM Base * * The lower part of GuC Address Space [0, ggtt_pin_bias) is mapped to WOPCM * while upper part of GuC Address Space [ggtt_pin_bias, GUC_GGTT_TOP) is mapped - * to DRAM. The value of the GuC ggtt_pin_bias is determined by WOPCM size and - * actual GuC WOPCM size. + * to DRAM. The value of the GuC ggtt_pin_bias is the GuC WOPCM size. */ /** * guc_init_ggtt_pin_bias() - Initialize the GuC ggtt_pin_bias value. * @guc: intel_guc structure. * - * This function will calculate and initialize the ggtt_pin_bias value based on - * overall WOPCM size and GuC WOPCM size. + * This function will calculate and initialize the ggtt_pin_bias value + * based on the GuC WOPCM size. */ static void guc_init_ggtt_pin_bias(struct intel_guc *guc) { struct drm_i915_private *i915 = guc_to_i915(guc); GEM_BUG_ON(!i915->wopcm.size); - GEM_BUG_ON(i915->wopcm.size < i915->wopcm.guc.base); + GEM_BUG_ON(range_overflows(i915->wopcm.guc.base, i915->wopcm.guc.size, + i915->wopcm.size)); - guc->ggtt_pin_bias = i915->wopcm.size - i915->wopcm.guc.base; + guc->ggtt_pin_bias = i915->wopcm.guc.size; } /**