From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 94E0CC4332F for ; Wed, 16 Mar 2022 01:48:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4041F10E4FA; Wed, 16 Mar 2022 01:48:02 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id A429D10E4DF for ; Wed, 16 Mar 2022 01:47:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647395279; x=1678931279; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=tNbmiF1OqFlCaDK47VA2ghn7UPI02n3H/S74xXCDLRY=; b=OPukr/JgIv1ifgcQ2Do19WKfz4TdSMHPYsvuGazgAJUUdOX8SYQH4+Jy LnAGrrNNHLe8ylBarI4qcdOlnl6fJ7w7JXa+ar3Ca90llctmP8hGv+Yat HptxENfpVggNgKDZBfVWlgNBm9+7EGPAPylj0KSG7kbMbNSzOzzu87RhV qtLqcUQyFZ7uupy0CAR/fTnEprHPno6hFsXFGeGduspWnq8dENctzTj1c haqo4R0jwt3GEBxmg2xREPApYoDZ+2DM/b3w7wmrJC/KUNwuCdIfYPFa7 R/vfIqDht6aTauuWOZT/rDUU8y8QxvZvhU1m/8avuFcljIEiYRLzn36Df g==; X-IronPort-AV: E=McAfee;i="6200,9189,10286"; a="255294150" X-IronPort-AV: E=Sophos;i="5.90,185,1643702400"; d="scan'208";a="255294150" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2022 18:47:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,185,1643702400"; d="scan'208";a="634804823" Received: from aalteres-desk.fm.intel.com ([10.80.57.53]) by FMSMGA003.fm.intel.com with ESMTP; 15 Mar 2022 18:47:58 -0700 From: Alan Previn To: intel-gfx@lists.freedesktop.org Date: Tue, 15 Mar 2022 18:50:21 -0700 Message-Id: <20220316015025.1664860-10-alan.previn.teres.alexis@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220316015025.1664860-1-alan.previn.teres.alexis@intel.com> References: <20220316015025.1664860-1-alan.previn.teres.alexis@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v10 09/13] drm/i915/guc: Check sizing of guc_capture output X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alan Previn Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add intel_guc_capture_output_min_size_est function to provide a reasonable minimum size for error-capture region before allocating the shared buffer. Signed-off-by: Alan Previn Reviewed-by: Matthew Brost --- .../gpu/drm/i915/gt/uc/intel_guc_capture.c | 48 +++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_capture.h | 1 + drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 7 ++- 3 files changed, 55 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c index f9612e45def6..413d1c2e84d1 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c @@ -663,6 +663,54 @@ intel_guc_capture_getnullheader(struct intel_guc *guc, return 0; } +#define GUC_CAPTURE_OVERBUFFER_MULTIPLIER 3 +int +intel_guc_capture_output_min_size_est(struct intel_guc *guc) +{ + struct intel_gt *gt = guc_to_gt(guc); + struct intel_engine_cs *engine; + enum intel_engine_id id; + int worst_min_size = 0, num_regs = 0; + size_t tmp = 0; + + /* + * If every single engine-instance suffered a failure in quick succession but + * were all unrelated, then a burst of multiple error-capture events would dump + * registers for every one engine instance, one at a time. In this case, GuC + * would even dump the global-registers repeatedly. + * + * For each engine instance, there would be 1 x guc_state_capture_group_t output + * followed by 3 x guc_state_capture_t lists. The latter is how the register + * dumps are split across different register types (where the '3' are global vs class + * vs instance). Finally, let's multiply the whole thing by 3x (just so we are + * not limited to just 1 round of data in a worst case full register dump log) + * + * NOTE: intel_guc_log that allocates the log buffer would round this size up to + * a power of two. + */ + + for_each_engine(engine, gt, id) { + worst_min_size += sizeof(struct guc_state_capture_group_header_t) + + (3 * sizeof(struct guc_state_capture_header_t)); + + if (!intel_guc_capture_getlistsize(guc, 0, GUC_CAPTURE_LIST_TYPE_GLOBAL, 0, &tmp)) + num_regs += tmp; + + if (!intel_guc_capture_getlistsize(guc, 0, GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS, + engine->class, &tmp)) { + num_regs += tmp; + } + if (!intel_guc_capture_getlistsize(guc, 0, GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE, + engine->class, &tmp)) { + num_regs += tmp; + } + } + + worst_min_size += (num_regs * sizeof(struct guc_mmio_reg)); + + return (worst_min_size * GUC_CAPTURE_OVERBUFFER_MULTIPLIER); +} + static void guc_capture_free_ads_cache(struct intel_guc_state_capture *gc) { diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h index 8de7704e12eb..540d72079462 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h @@ -11,6 +11,7 @@ struct guc_gt_system_info; struct intel_guc; +int intel_guc_capture_output_min_size_est(struct intel_guc *guc); int intel_guc_capture_getlist(struct intel_guc *guc, u32 owner, u32 type, u32 classid, void **outptr); int intel_guc_capture_getlistsize(struct intel_guc *guc, u32 owner, u32 type, u32 classid, diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c index fe4b2d3f305d..ed05b1a04f9c 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c @@ -7,10 +7,11 @@ #include #include "gt/intel_gt.h" +#include "intel_guc_capture.h" +#include "intel_guc_log.h" #include "i915_drv.h" #include "i915_irq.h" #include "i915_memcpy.h" -#include "intel_guc_log.h" static void guc_log_copy_debuglogs_for_relay(struct intel_guc_log *log); @@ -466,6 +467,10 @@ int intel_guc_log_create(struct intel_guc_log *log) * | Capture logs | * +===============================+ + CAPTURE_SIZE */ + if (intel_guc_capture_output_min_size_est(guc) > CAPTURE_BUFFER_SIZE) + DRM_WARN("GuC log buffer for state_capture maybe too small. %d < %d\n", + CAPTURE_BUFFER_SIZE, intel_guc_capture_output_min_size_est(guc)); + guc_log_size = PAGE_SIZE + CRASH_BUFFER_SIZE + DEBUG_BUFFER_SIZE + CAPTURE_BUFFER_SIZE; -- 2.25.1