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 BDD14CEDD85 for ; Wed, 9 Oct 2024 11:30:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7C46C10E111; Wed, 9 Oct 2024 11:30:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="KuN3sCRt"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0846010E111 for ; Wed, 9 Oct 2024 11:30:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728473446; x=1760009446; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=1Doph4/Jum7LvzulOahgyNYZttHZnFcyfl2q80ZO16Q=; b=KuN3sCRtqnpZJB47FmPI90rumoVI/4A2PuYnjEipnj62GNsiFK7ELLkf Oh8WRgi1o3C1wnqUWx99W3Qr4DipgdYqt+qJywePtgUgpw5fdT0wCA6B8 5/gL6XQjDtBMlzUZiK91pqMN5/i77Hpwe9kpvRpI10gEV4b3D5prun/A0 ebDCVgplLUODvTqWnrjj8zy2tbNpNCwlfhDLuUMfeJn6zuA3ORseGXJZ/ NtNIq3h9kyQIi9GlN43hEdH0f10vyxtuWebUaZNCFA/+BxL18dTXwOWOG EL/3OZZK9Ry1em1UtTtuVzEsqOTavg2M4oKISi/rqY/jsDJ3+9E++t/VR w==; X-CSE-ConnectionGUID: 12kyjvb5TbCHw4taUeys9g== X-CSE-MsgGUID: kRgvgR+3QSm9W0BIL7hm9Q== X-IronPort-AV: E=McAfee;i="6700,10204,11219"; a="45286253" X-IronPort-AV: E=Sophos;i="6.11,189,1725346800"; d="scan'208";a="45286253" 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 04:30:39 -0700 X-CSE-ConnectionGUID: gddSEu0QQvGhgDkLMYEDaQ== X-CSE-MsgGUID: Y12CMYlMRvKPXe1swbpRpA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,189,1725346800"; d="scan'208";a="113699910" 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 04:30:36 -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 2/6] lib/igt_sriov_device: add helper for resetting SR-IOV device Date: Wed, 9 Oct 2024 13:30:14 +0200 Message-Id: <20241009113018.741371-3-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" Reset is initiated by writing 1 to device's sysfs reset attribute. 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 | 51 ++++++++++++++++++++++++++++++++++++++++++ lib/igt_sriov_device.h | 2 ++ 2 files changed, 53 insertions(+) diff --git a/lib/igt_sriov_device.c b/lib/igt_sriov_device.c index d20c74823..2b83cd43c 100644 --- a/lib/igt_sriov_device.c +++ b/lib/igt_sriov_device.c @@ -413,3 +413,54 @@ int igt_sriov_device_sysfs_open(int pf, unsigned int vf_num) return fd; } + +/** + * igt_sriov_device_reset_exists: + * @pf: PF device file descriptor + * @vf_num: VF number (1-based to identify single VF) or 0 for PF + * + * Check if reset attribute exists for a given SR-IOV device. + * + * Returns: + * True if reset attribute exists, false otherwise. + */ +bool igt_sriov_device_reset_exists(int pf, unsigned int vf_num) +{ + int sysfs; + bool reset_exists; + + sysfs = igt_sriov_device_sysfs_open(pf, vf_num); + if (sysfs < 0) + return false; + + reset_exists = igt_sysfs_has_attr(sysfs, "reset"); + close(sysfs); + + return reset_exists; +} + +/** + * igt_sriov_device_reset: + * @pf: PF device file descriptor + * @vf_num: VF number (1-based to identify single VF) or 0 for PF + * + * Trigger FLR on a given VF. + * + * Returns: + * True on success, false on failure. + */ +bool igt_sriov_device_reset(int pf, unsigned int vf_num) +{ + int sysfs; + bool ret; + + sysfs = igt_sriov_device_sysfs_open(pf, vf_num); + if (sysfs < 0) + return false; + + igt_debug("Initiating FLR on VF%d\n", vf_num); + ret = igt_sysfs_set(sysfs, "reset", "1"); + close(sysfs); + + return ret; +} diff --git a/lib/igt_sriov_device.h b/lib/igt_sriov_device.h index dc95a4c78..4b63ceb22 100644 --- a/lib/igt_sriov_device.h +++ b/lib/igt_sriov_device.h @@ -31,6 +31,8 @@ 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); +bool igt_sriov_device_reset_exists(int pf, unsigned int vf_num); +bool igt_sriov_device_reset(int pf, unsigned int vf_num); /** * for_each_sriov_vf - Helper for running code on each VF -- 2.31.1