From patchwork Sat Feb 26 09:55:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Previn X-Patchwork-Id: 12761258 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 8C2A1C433EF for ; Sat, 26 Feb 2022 09:53:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E9C6410E40D; Sat, 26 Feb 2022 09:53:37 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1B39D10E3FB for ; Sat, 26 Feb 2022 09:53:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1645869215; x=1677405215; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FM7EmRPD8GRplqyioMbBuknpzPACRDkKpZiFlQmW2dc=; b=IOmLlss+xjy/m14AJhQ0Aj37CT3fmQscS6yRR2TB6dxiGbj/meDymvLn Tp1AqLFHFu7g9N1MhiZJL+jjFnZ2lKsEwEXvDL99bhNL+3c8XI5oMWMN3 /FahvyXF2HHNfM3VSqAmklgCw9dy3P+16qNryuGZ9wZjUt+PGdchymJhk 4Jlq/mnG1w0h+vxvVo8MnvuuAWECsmpnMAcvkSu/x5GONTQmr7A+rCNjf 0dliR9z7KRAJHn5UZEt3ZjdJaPYf8Yx5HYYMyNUH6qbVfTFnzqD8IUeIE aMzMddoRLf3ZExnKzfWuZqCHM2JHf2QA7DuXCnTtPUfXe8PRtRdXwrtS5 g==; X-IronPort-AV: E=McAfee;i="6200,9189,10269"; a="232620772" X-IronPort-AV: E=Sophos;i="5.90,139,1643702400"; d="scan'208";a="232620772" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2022 01:53:34 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,139,1643702400"; d="scan'208";a="506953243" Received: from aalteres-desk.fm.intel.com ([10.80.57.53]) by orsmga002.jf.intel.com with ESMTP; 26 Feb 2022 01:53:34 -0800 From: Alan Previn To: intel-gfx@lists.freedesktop.org Date: Sat, 26 Feb 2022 01:55:37 -0800 Message-Id: <20220226095541.1010534-10-alan.previn.teres.alexis@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220226095541.1010534-1-alan.previn.teres.alexis@intel.com> References: <20220226095541.1010534-1-alan.previn.teres.alexis@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v7 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 Reported-by: kernel test robot --- .../gpu/drm/i915/gt/uc/intel_guc_capture.c | 47 +++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_capture.h | 1 + drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 7 ++- 3 files changed, 54 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 eb22f979d720..ed78995bcc35 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c @@ -644,6 +644,53 @@ intel_guc_capture_getlist(struct intel_guc *guc, u32 owner, u32 type, u32 classi 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 __guc_state_capture_priv *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 f05365239a2f..24a11f33f7d9 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h @@ -12,6 +12,7 @@ struct file; 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, struct file **fileptr); 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 2cc52f1eedf3..e9a865c2f4cb 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c @@ -6,10 +6,11 @@ #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); @@ -464,6 +465,10 @@ 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;