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 B8A4BD1712E for ; Mon, 21 Oct 2024 20:07:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6036010E58F; Mon, 21 Oct 2024 20:07:59 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Pa+YJvOY"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 04B2910E58F for ; Mon, 21 Oct 2024 20:07:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729541278; x=1761077278; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=RfYPDBX3yep/TLQ+H0ZiI5qrBozsiWsRyzDsX+CEwmo=; b=Pa+YJvOY9xmYQSCmkoq9IasCsyAzMFFspjhZya/jL5raeN7BQKuFlbNA SuI3oc59XIEc5b/Fe66g1uMshrtiS8EZIZTvj+rnPfVVfnBxb0zraNd0t 1oLfvKSAG3ihfVFJDEZfWkvmo67Dee4jdWsAcUJJb/gsFb29yozXsT7uK WzukwiM8gS+lQD4dC5HwmnZIkgKj6Xh+JKAkJs/WstH7j1A+N5y2xjWDJ IQevnZIFvl/2NVc2M0h01nOSyKjgO0G+8Iv38gFkTd/Nt5i2X1/tXB1Yf bQf6d5F/3WvwTYfGhpVGB1uzecOhJScIJEB6CTHJ9ZhroJMsjfpKB4paS A==; X-CSE-ConnectionGUID: 5+FpfEfBR9+Ab3l2okDOzg== X-CSE-MsgGUID: JOQYNOu5R3msTcvp1Idkkg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="51591265" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="51591265" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2024 13:07:58 -0700 X-CSE-ConnectionGUID: H4pH/hhYQBWvNRdjETswrA== X-CSE-MsgGUID: YKDbwG8GTw6RcjUjZ2/4tA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,221,1725346800"; d="scan'208";a="79568712" Received: from mbernato-mobl1.ger.corp.intel.com (HELO localhost) ([10.246.1.47]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2024 13:07:54 -0700 From: Marcin Bernatowicz To: igt-dev@lists.freedesktop.org Cc: adam.miszczak@linux.intel.com, jakub1.kolakowski@intel.com, lukasz.laguna@intel.com, michal.wajdeczko@intel.com, michal.winiarski@intel.com, narasimha.c.v@intel.com, piotr.piorkowski@intel.com, satyanarayana.k.v.p@intel.com, tomasz.lis@intel.com, Marcin Bernatowicz Subject: [PATCH v2 i-g-t 1/6] lib/igt_sriov_device: add helper for opening SR-IOV device sysfs Date: Mon, 21 Oct 2024 22:07:32 +0200 Message-Id: <20241021200737.941384-2-marcin.bernatowicz@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20241021200737.941384-1-marcin.bernatowicz@linux.intel.com> References: <20241021200737.941384-1-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 Reviewed-by: Adam Miszczak 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