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 AD170D1712B for ; Mon, 21 Oct 2024 20:08:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6623310E592; Mon, 21 Oct 2024 20:08:06 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="aUGu6UCu"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id D341110E592 for ; Mon, 21 Oct 2024 20:08:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729541286; x=1761077286; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=G2X+H0lvjj6zUoZc322s9wikEO8uUiLcDGtPX/ks8PY=; b=aUGu6UCuMRg68zAzYMBchRalgUf0Exv1lb8TCJuxWNK08FI7ihuzXEiV SBAT5NKe0VYxUXC1a7HbvrCTYnB4zK8k9wZ2KLqhVIiCOJec98Ap4qBNo 3F31fj1Mq0oj5ulv+pH6vF54ZXj7UqPOCyKrxC4Ezx0atHni4YB2tWfUf gE2wGgjc2qm5nNkwfdQ7GehP40fUDXEVyA3G7YC4MjpKQSRCzAWriupXk 9w+sAiAPip0EniCtTG/gX0FgT6PH+0xFgU5ZXp6ThmNdd46mYrYxOyFBx boYunK1jOvalMnswY8mXtHByml1dnmfvRFxKQoFs8bGKJ9lG1OLslhes8 w==; X-CSE-ConnectionGUID: Q6cZmDQUSdWwLmohbVA8IA== X-CSE-MsgGUID: 9Z7aiWirRfqEHYxvvInxpg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="51591269" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="51591269" 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 13:08:06 -0700 X-CSE-ConnectionGUID: LnipVv8HRKOXpQqFmLCD6w== X-CSE-MsgGUID: qMtUNvVhTvmSsLAoWGhNIw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,221,1725346800"; d="scan'208";a="79568726" 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 13:08:02 -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 2/6] lib/igt_sriov_device: add helper for resetting SR-IOV device Date: Mon, 21 Oct 2024 22:07:33 +0200 Message-Id: <20241021200737.941384-3-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" Reset is initiated by writing 1 to device's sysfs reset attribute. 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 | 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