From patchwork Tue Sep 17 04:02:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raag Jadav X-Patchwork-Id: 13805885 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 1FB93C3ABCF for ; Tue, 17 Sep 2024 04:03:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B1E2210E3FF; Tue, 17 Sep 2024 04:03:34 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="m1E5+AiB"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5A28310E332; Tue, 17 Sep 2024 04:03:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1726545813; x=1758081813; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=U5X7DprDXAM1iIvXBrPSSCmo6qVTMWAwY4c3tE8APrM=; b=m1E5+AiBR2uglG6Ecf2N4f/QuBt83HxMppmTNqxocjAjEx5XNIg6KJjb dF4cHeYnR0WvpJITCEl8N0IsQTLfPVdI73fGbbAOlC/XpJor+TLzI4qzf 2OWlfeip+jEm1bWhSSC2q1oHoK1f/NoxciM/k6Ql8jgFvQq5pjlvH3Ejc K6PcG4lpnjkEQN+E4AKy2ZAcslc5DhFl21/zP8HVH9VAFsRjYO5FBGdYf +C8trPWA1UXQJrftrWCQo/mFuzGg03kXN9MANZNJEOfLja53TKqEouAsF Ny3vQFYnfjHjO43cqkwlExGVHF5Xe0zCSkrtJFFQu3eC97M4eYnN2pMa1 A==; X-CSE-ConnectionGUID: yB9zzmQcQjGe6yqu7AfFHw== X-CSE-MsgGUID: ZIarDkW8QPuC3gRHZQnkrA== X-IronPort-AV: E=McAfee;i="6700,10204,11197"; a="42865168" X-IronPort-AV: E=Sophos;i="6.10,234,1719903600"; d="scan'208";a="42865168" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Sep 2024 21:03:33 -0700 X-CSE-ConnectionGUID: sxM0JrslTDWH6C8FByS9Hw== X-CSE-MsgGUID: pcT8D/UiRpCciO3NmKNsUg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,234,1719903600"; d="scan'208";a="69168595" Received: from jraag-nuc8i7beh.iind.intel.com ([10.145.169.79]) by fmviesa008.fm.intel.com with ESMTP; 16 Sep 2024 21:03:28 -0700 From: Raag Jadav To: airlied@gmail.com, simona@ffwll.ch, lucas.demarchi@intel.com, thomas.hellstrom@linux.intel.com, rodrigo.vivi@intel.com, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, tursulin@ursulin.net, lina@asahilina.net Cc: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, himal.prasad.ghimiray@intel.com, francois.dugast@intel.com, aravind.iddamsetty@linux.intel.com, anshuman.gupta@intel.com, andi.shyti@linux.intel.com, andriy.shevchenko@linux.intel.com, matthew.d.roper@intel.com, Raag Jadav Subject: [PATCH v5 2/4] drm: Expose wedge recovery methods Date: Tue, 17 Sep 2024 09:32:33 +0530 Message-Id: <20240917040235.197019-3-raag.jadav@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240917040235.197019-1-raag.jadav@intel.com> References: <20240917040235.197019-1-raag.jadav@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" Now that we have device wedged event in place, add wedge_recovery sysfs attribute which will expose recovery methods supported by the DRM device. This is useful for userspace consumers in cases where the device supports multiple recovery methods which can be used as fallbacks. $ cat /sys/class/drm/card0/wedge_recovery rebind bus-reset reboot Signed-off-by: Raag Jadav --- drivers/gpu/drm/drm_sysfs.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index fb3bbb6adcd1..b88cdbfa3b5e 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -36,6 +36,8 @@ #define to_drm_minor(d) dev_get_drvdata(d) #define to_drm_connector(d) dev_get_drvdata(d) +extern const char *const wedge_recovery_opts[]; + /** * DOC: overview * @@ -508,6 +510,26 @@ void drm_sysfs_connector_property_event(struct drm_connector *connector, } EXPORT_SYMBOL(drm_sysfs_connector_property_event); +static ssize_t wedge_recovery_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct drm_minor *minor = to_drm_minor(device); + struct drm_device *dev = minor->dev; + int opt, count = 0; + + for_each_set_bit(opt, &dev->wedge_recovery, DRM_WEDGE_RECOVERY_MAX) + count += sysfs_emit_at(buf, count, "%s\n", wedge_recovery_opts[opt]); + + return count; +} +static DEVICE_ATTR_RO(wedge_recovery); + +static struct attribute *minor_dev_attrs[] = { + &dev_attr_wedge_recovery.attr, + NULL +}; +ATTRIBUTE_GROUPS(minor_dev); + struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) { const char *minor_str; @@ -532,6 +554,7 @@ struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) kdev->devt = MKDEV(DRM_MAJOR, minor->index); kdev->class = drm_class; kdev->type = &drm_sysfs_device_minor; + kdev->groups = minor_dev_groups; } kdev->parent = minor->dev->dev;