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 55FA3C021A9 for ; Mon, 17 Feb 2025 13:59:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C50DB10E324; Mon, 17 Feb 2025 13:59:34 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="RXNIMUxP"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id ABDE410E324 for ; Mon, 17 Feb 2025 13:59:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1739800774; x=1771336774; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DU9Wg8ivqAksQboPdcbd6Hjf7AJwQfiSSqpLwAxlgNA=; b=RXNIMUxPqbo+P9cavxCRoNhP2SbIWqTFtQnmdsm3Mia+Ds28XcRDb2vB X4m53i6euZRXZyu6WHjejoxx/YxcxXAk0i45bWj2fFtnvEDrTmOHjuu9B H0J1L0BZItFsxVOwymoGI+QuPv9YFPfR1eAkK0i3it3KtAI7dDUnMP8im C530WT0q/PtuGrQHDKEAeEIE0J8eIXNtw11kHaNvT8mbveMzVVK8QE9Cm Cu+3VmKEleINVeh7ThsmpB9lNg20K/uxpUsJoFvBqI4ZEx3njX1QhdTON 4tc69VitkM5tyeFrIt5czVjf8bre7epxUiJBENgPzWaQOA0ShrIJ1t13H w==; X-CSE-ConnectionGUID: l52u8CpDQX2/kF0CepitEA== X-CSE-MsgGUID: fY8vn5y6RpKltgFTHtjCvw== X-IronPort-AV: E=McAfee;i="6700,10204,11348"; a="65836657" X-IronPort-AV: E=Sophos;i="6.13,293,1732608000"; d="scan'208";a="65836657" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2025 05:59:33 -0800 X-CSE-ConnectionGUID: +vicqQCfQvyj2VK89C1ufw== X-CSE-MsgGUID: W19Beni8QfGpbODh2XxOBw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,293,1732608000"; d="scan'208";a="119128070" Received: from rtauro-desk.iind.intel.com ([10.190.238.50]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2025 05:59:31 -0800 From: Riana Tauro To: igt-dev@lists.freedesktop.org Cc: riana.tauro@intel.com, anshuman.gupta@intel.com, umesh.nerlige.ramappa@intel.com, vinay.belgaumkar@intel.com, kamil.konieczny@linux.intel.com, soham.purkait@intel.com Subject: [PATCH i-g-t v2 1/3] lib/igt_perf: Add utils to extract PMU event info Date: Mon, 17 Feb 2025 19:50:16 +0530 Message-ID: <20250217142021.951467-2-riana.tauro@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250217142021.951467-1-riana.tauro@intel.com> References: <20250217142021.951467-1-riana.tauro@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" From: Vinay Belgaumkar Functions to parse event ID and GT bit shift for PMU events. v2: Review comments (Riana) v3: Review comments (Lucas) v4: fix kernel-doc (Kamil) remove parameter for end (Umesh) Reviewed-by: Riana Tauro Signed-off-by: Vinay Belgaumkar --- lib/igt_perf.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_perf.h | 2 ++ 2 files changed, 74 insertions(+) diff --git a/lib/igt_perf.c b/lib/igt_perf.c index 3866c6d77..c1b8cc629 100644 --- a/lib/igt_perf.c +++ b/lib/igt_perf.c @@ -92,6 +92,78 @@ const char *xe_perf_device(int xe, char *buf, int buflen) return buf; } +/** + * perf_event_format: Returns the shift positions of an event format param + * @device: PMU device + * @param: parameter to obtain the shiift + * @shift: shift bits for the parameter + * + * Returns: 0 on success or negative error code + */ +int perf_event_format(const char *device, const char *param, uint32_t *shift) +{ + char buf[NAME_MAX]; + ssize_t bytes; + int ret = 0, fd; + uint32_t end; + + snprintf(buf, sizeof(buf), + "/sys/bus/event_source/devices/%s/format/%s", + device, param); + + fd = open(buf, O_RDONLY | O_CLOEXEC); + if (fd < 0) + return -EINVAL; + + bytes = read(fd, buf, sizeof(buf) - 1); + close(fd); + if (bytes < 1) + return -EINVAL; + + buf[bytes] = '\0'; + ret = sscanf(buf, "config:%u-%u", shift, &end); + if (ret != 2) + return -EINVAL; + + return ret; +} + +/** + * perf_event_config: + * @device: Device string in driver:pci format + * @event: The event name + * @config: Pointer to the config + * + * Returns: 0 for success, negative value on error + */ +int perf_event_config(const char *device, const char *event, uint64_t *config) +{ + char buf[NAME_MAX]; + ssize_t bytes; + int ret = 0, fd; + + snprintf(buf, sizeof(buf), + "/sys/bus/event_source/devices/%s/events/%s", + device, + event); + + fd = open(buf, O_RDONLY); + if (fd < 0) + return -EINVAL; + + bytes = read(fd, buf, sizeof(buf) - 1); + close(fd); + if (bytes < 1) + return ret; + + buf[bytes] = '\0'; + ret = sscanf(buf, "event=0x%lx", config); + if (ret != 1) + return -EINVAL; + + return 0; +} + uint64_t xe_perf_type_id(int xe) { char buf[80]; diff --git a/lib/igt_perf.h b/lib/igt_perf.h index 3d9ba2917..58d7d47aa 100644 --- a/lib/igt_perf.h +++ b/lib/igt_perf.h @@ -71,5 +71,7 @@ int perf_i915_open(int i915, uint64_t config); int perf_i915_open_group(int i915, uint64_t config, int group); int perf_xe_open(int xe, uint64_t config); +int perf_event_config(const char *device, const char *event, uint64_t *config); +int perf_event_format(const char *device, const char *param, uint32_t *shift); #endif /* I915_PERF_H */ -- 2.47.1