From patchwork Wed Feb 5 02:10:55 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinay Belgaumkar X-Patchwork-Id: 13960424 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 99164C02196 for ; Wed, 5 Feb 2025 02:14:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1998810E717; Wed, 5 Feb 2025 02:14:48 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="JVDS5zsx"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id ED55310E717; Wed, 5 Feb 2025 02:14:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1738721687; x=1770257687; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FoSNgFRNk5PoDLBSNQWdJxR3lfwq8QNqI9on/kD4VMY=; b=JVDS5zsxfsVGQkoiWM+ZN3wkVQW6vT9mMIQF6mt6qnlkTTwDtbfGi9jP QjG2otKxwJPhV22v7TPannWW6yI711ijH4snThOQO7sNk8My93I39O5Cw ZwPeGnkNuYgWYt0+Z8m6hbv7zgPBRRFdlUdQEVkS5hkbjtsRAEnQTkTJ9 S5ffV41jWFy0QMFpKxMOP+KwUuTktFBZpO5NFgBq6Qd23k9estB0hxVFx JjGPje9bSpiwYTTl0vTlCGfRTZXO3eEJtMqH0cpFNvDYtRVIvl2OqfXWs NhNBRE1fBqe3yqGymnVK309jOk4zMYgv9uHIZQ/vlvQBHEtQznSpbSNrm g==; X-CSE-ConnectionGUID: zmAfBMoXTOuHa4Ap3ILnqQ== X-CSE-MsgGUID: nzNuk+s0QhucEGcjqbtENA== X-IronPort-AV: E=McAfee;i="6700,10204,11336"; a="39160213" X-IronPort-AV: E=Sophos;i="6.13,260,1732608000"; d="scan'208";a="39160213" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2025 18:14:46 -0800 X-CSE-ConnectionGUID: HE9YAGcpTyGO2GswKWaoow== X-CSE-MsgGUID: M3cU7HapTU+qcM8CZSVcYw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="111643374" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.39.141]) by orviesa008.jf.intel.com with ESMTP; 04 Feb 2025 18:14:46 -0800 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, igt-dev@lists.freedesktop.org Cc: Vinay Belgaumkar , Riana Tauro , Lucas De Marchi , Kamil Konieczny , Rodrigo Vivi Subject: [PATCH i-g-t v8 2/3] lib/igt_perf: Add utils to extract PMU event info Date: Tue, 4 Feb 2025 18:10:55 -0800 Message-Id: <20250205021056.1539902-3-vinay.belgaumkar@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20250205021056.1539902-1-vinay.belgaumkar@intel.com> References: <20250205021056.1539902-1-vinay.belgaumkar@intel.com> MIME-Version: 1.0 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Functions to parse event ID and GT bit shift for PMU events. v2: Review comments (Riana) v3: Review comments (Lucas) Cc: Riana Tauro Cc: Lucas De Marchi Cc: Kamil Konieczny Cc: Rodrigo Vivi Reviewed-by: Riana Tauro Signed-off-by: Vinay Belgaumkar --- lib/igt_perf.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_perf.h | 2 ++ 2 files changed, 72 insertions(+) diff --git a/lib/igt_perf.c b/lib/igt_perf.c index 3866c6d77..f021fc3ec 100644 --- a/lib/igt_perf.c +++ b/lib/igt_perf.c @@ -92,6 +92,76 @@ const char *xe_perf_device(int xe, char *buf, int buflen) return buf; } +/** + * perf_event_format: Returns the start/end positions of an event format param + * @device: PMU device + * @param: Parameter for which you need the format start/end bits + * Returns: 0 on success or negative error code + */ +int perf_event_format(const char *device, const char *param, uint32_t *start, uint32_t *end) +{ + char buf[NAME_MAX]; + ssize_t bytes; + int ret; + int fd; + + 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", start, 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; + int 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..69f7a3d74 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 *start, uint32_t *end); #endif /* I915_PERF_H */