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 EBDA8CEDD85 for ; Wed, 9 Oct 2024 11:30:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AB4B010E163; Wed, 9 Oct 2024 11:30:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="XXLlegoS"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id EAAA410E163 for ; Wed, 9 Oct 2024 11:30:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728473433; x=1760009433; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6ud1l8AaamyM15HoW3y5B7YPoCLxswULsThl683GxOE=; b=XXLlegoSwEn56kBRQ4zVhFMn38RQJW317G4nr44HjBQwBWstMKNYJLhP w4d0JKZuQEd9T9NgQyl/Puuzp8utbUiV06Lg8YPHPBTA7O/roSnJiWsT5 h1crwhwNdIwZEQL46MigKgTPkrG9dBlv9mg+fqoTw1TNsA50QIcWucvxB pK3OrTq3C0RC7pRldryES2hJLE/qyFpGp2tdWD/Pf4mDmKBCHh3V3ZSKV 8/6OvKBY9+wAvflvAJZxDHPl0Ff0YbnvPp25ny9VPLT4H/sVNigElOcbV DHD8Ybai/6c6GguW1N7hcMrdWElEfeByQ2k+z5opzTRB29Aeg9zO5kqPr Q==; X-CSE-ConnectionGUID: 4q+8Sra6Tf2rlqW0bFD9Pg== X-CSE-MsgGUID: 8QJxXl4JToGjoAlP6g+Lww== X-IronPort-AV: E=McAfee;i="6700,10204,11219"; a="45286183" X-IronPort-AV: E=Sophos;i="6.11,189,1725346800"; d="scan'208";a="45286183" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2024 04:30:33 -0700 X-CSE-ConnectionGUID: FtesljCqTHmO428rEWvprw== X-CSE-MsgGUID: +ChMh4V6T0KP/8E4Fn9iJA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,189,1725346800"; d="scan'208";a="113699865" Received: from mbernato-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.16.246]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2024 04:30:29 -0700 From: Marcin Bernatowicz To: igt-dev@lists.freedesktop.org Cc: Marcin Bernatowicz , Adam Miszczak , Jakub Kolakowski , Lukasz Laguna , =?UTF-8?q?Micha=C5=82=20Wajdeczko?= , =?UTF-8?q?Micha=C5=82=20Winiarski?= , Narasimha C V , =?UTF-8?q?Piotr=20Pi=C3=B3rkowski?= , Satyanarayana K V P , Tomasz Lis Subject: [PATCH i-g-t 1/6] lib/igt_sriov_device: add helper for opening SR-IOV device sysfs Date: Wed, 9 Oct 2024 13:30:13 +0200 Message-Id: <20241009113018.741371-2-marcin.bernatowicz@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20241009113018.741371-1-marcin.bernatowicz@linux.intel.com> References: <20241009113018.741371-1-marcin.bernatowicz@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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" Helper allows to open sysfs directory corresponding to SR-IOV device. Signed-off-by: Marcin Bernatowicz Cc: Adam Miszczak Cc: Jakub Kolakowski Cc: Lukasz Laguna Cc: Michał Wajdeczko Cc: Michał Winiarski Cc: Narasimha C V Cc: Piotr Piórkowski Cc: Satyanarayana K V P Cc: Tomasz Lis --- lib/igt_sriov_device.c | 32 ++++++++++++++++++++++++++++++++ lib/igt_sriov_device.h | 1 + 2 files changed, 33 insertions(+) diff --git a/lib/igt_sriov_device.c b/lib/igt_sriov_device.c index 7c3814bf2..d20c74823 100644 --- a/lib/igt_sriov_device.c +++ b/lib/igt_sriov_device.c @@ -5,6 +5,7 @@ #include #include +#include #include #include @@ -381,3 +382,34 @@ void igt_sriov_unbind_vf_drm_driver(int pf, unsigned int vf_num) { igt_assert(__igt_sriov_bind_vf_drm_driver(pf, vf_num, false)); } + +/** + * igt_sriov_device_sysfs_open: + * @pf: PF device file descriptor + * @vf_num: VF number (1-based to identify single VF) or 0 for PF + * + * Open the sysfs directory corresponding to SR-IOV device. + * + * Returns: + * The SR-IOV device sysfs directory fd, -1 on failure. + */ +int igt_sriov_device_sysfs_open(int pf, unsigned int vf_num) +{ + char path[PATH_MAX]; + int sysfs, fd; + + sysfs = igt_sysfs_open(pf); + if (sysfs < 0) + return -1; + + if (!vf_num) + snprintf(path, sizeof(path), "device"); + else + /* vf_num is 1-based, but virtfn is 0-based */ + snprintf(path, sizeof(path), "device/virtfn%u", vf_num - 1); + + fd = openat(sysfs, path, O_DIRECTORY | O_RDONLY); + close(sysfs); + + return fd; +} diff --git a/lib/igt_sriov_device.h b/lib/igt_sriov_device.h index 20ffc515f..dc95a4c78 100644 --- a/lib/igt_sriov_device.h +++ b/lib/igt_sriov_device.h @@ -30,6 +30,7 @@ int igt_sriov_open_vf_drm_device(int pf, unsigned int vf_num); bool igt_sriov_is_vf_drm_driver_probed(int pf, unsigned int vf_num); void igt_sriov_bind_vf_drm_driver(int pf, unsigned int vf_num); void igt_sriov_unbind_vf_drm_driver(int pf, unsigned int vf_num); +int igt_sriov_device_sysfs_open(int pf, unsigned int vf_num); /** * for_each_sriov_vf - Helper for running code on each VF -- 2.31.1