From patchwork Thu Sep 8 05:22:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dixit, Ashutosh" X-Patchwork-Id: 12969677 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 C5898ECAAD5 for ; Thu, 8 Sep 2022 05:22:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D0E4B10E958; Thu, 8 Sep 2022 05:22:57 +0000 (UTC) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 097BF10E958 for ; Thu, 8 Sep 2022 05:22:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662614574; x=1694150574; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lNZ1yBhLxY4g0F+J9L8t83ajZ/WprlpF3zRpNvVbTko=; b=hLUmVZwj1XKueX327lYOcCl+U6GuePtcJ9FBbD1rkjUWCrhBrbI+9OlN QvmDVsId+YcanaECRRiQpBhX1e2ceWHhmvv+xFSxJ85kozx0oRGHP8cnF +YICl2c324sdcuU9hK+n+ochwOE4PUrDnc2aNHrC4Qt4izhTfuMhrJcmu qHUWbRat7gFR/aV+tMtY1O1GV/5iSWei9r7+/85S1uJNumh/tEd+/57D7 va/rcenaI0PYvc5krd6NO5DUz+mFRNbgoCE6BFDaNEZ8YejIsHLQCjsbJ HQSXI3MwkPgKIgYEm/x5eiyr6Qs8f6g6e+2TiAlAKA42EMU/54j2eaeGt Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10463"; a="298408392" X-IronPort-AV: E=Sophos;i="5.93,299,1654585200"; d="scan'208";a="298408392" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Sep 2022 22:22:53 -0700 X-IronPort-AV: E=Sophos;i="5.93,299,1654585200"; d="scan'208";a="718416748" Received: from orsosgc001.jf.intel.com (HELO unerlige-ril.jf.intel.com) ([10.165.21.138]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Sep 2022 22:22:52 -0700 From: Ashutosh Dixit To: intel-gfx@lists.freedesktop.org Date: Wed, 7 Sep 2022 22:22:49 -0700 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 6/8] drm/i915/debugfs: Add perf_limit_reasons in debugfs 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: Rodrigo Vivi Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Tilak Tangudu Add perf_limit_reasons in debugfs. The upper 16 perf_limit_reasons RW "log" bits are identical to the lower 16 RO "status" bits except that the "log" bits remain set until cleared, thereby ensuring the throttling occurrence is not missed. The clear fop clears the upper 16 "log" bits, the get fop gets all 32 "log" and "status" bits. v2: Expand commit message and clarify "log" and "status" bits in comment (Rodrigo) Cc: Rodrigo Vivi Signed-off-by: Ashutosh Dixit Signed-off-by: Tilak Tangudu Reviewed-by: Rodrigo Vivi Reviewed-by: Rodrigo Vivi > --- drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c | 31 +++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c index 108b9e76c32e..a009cf69103a 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c @@ -655,6 +655,36 @@ static bool rps_eval(void *data) DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(rps_boost); +static int perf_limit_reasons_get(void *data, u64 *val) +{ + struct intel_gt *gt = data; + intel_wakeref_t wakeref; + + with_intel_runtime_pm(gt->uncore->rpm, wakeref) + *val = intel_uncore_read(gt->uncore, GT0_PERF_LIMIT_REASONS); + + return 0; +} + +static int perf_limit_reasons_clear(void *data, u64 val) +{ + struct intel_gt *gt = data; + intel_wakeref_t wakeref; + + /* + * Clear the upper 16 "log" bits, the lower 16 "status" bits are + * read-only. The upper 16 "log" bits are identical to the lower 16 + * "status" bits except that the "log" bits remain set until cleared. + */ + with_intel_runtime_pm(gt->uncore->rpm, wakeref) + intel_uncore_rmw(gt->uncore, GT0_PERF_LIMIT_REASONS, + GT0_PERF_LIMIT_REASONS_LOG_MASK, 0); + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(perf_limit_reasons_fops, perf_limit_reasons_get, + perf_limit_reasons_clear, "%llu\n"); + void intel_gt_pm_debugfs_register(struct intel_gt *gt, struct dentry *root) { static const struct intel_gt_debugfs_file files[] = { @@ -664,6 +694,7 @@ void intel_gt_pm_debugfs_register(struct intel_gt *gt, struct dentry *root) { "forcewake_user", &forcewake_user_fops, NULL}, { "llc", &llc_fops, llc_eval }, { "rps_boost", &rps_boost_fops, rps_eval }, + { "perf_limit_reasons", &perf_limit_reasons_fops, NULL }, }; intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 24009786f88b..9492f8f43b25 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1802,6 +1802,7 @@ #define POWER_LIMIT_4_MASK REG_BIT(8) #define POWER_LIMIT_1_MASK REG_BIT(10) #define POWER_LIMIT_2_MASK REG_BIT(11) +#define GT0_PERF_LIMIT_REASONS_LOG_MASK REG_GENMASK(31, 16) #define CHV_CLK_CTL1 _MMIO(0x101100) #define VLV_CLK_CTL2 _MMIO(0x101104)