From patchwork Mon Sep 23 03:58:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raag Jadav X-Patchwork-Id: 13809280 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 05918CF9C6E for ; Mon, 23 Sep 2024 03:59:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A0E6810E367; Mon, 23 Sep 2024 03:59:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ez1gtRFK"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1AB0810E36D; Mon, 23 Sep 2024 03:59:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1727063980; x=1758599980; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=tKbIYASP1CsvFDUuFBHMLMuWYnHOaHy/2dJpg4EAGPg=; b=ez1gtRFK/S4mIlfHE/rUUBD+Q8YhTTbBKFVLFY6bbVYD+QE3xk3dQ1V/ /bZfM0Lvs7jrqq7qeEzOMQxndB/C5+jdKQ6fO0N8vofK9PL7/fhD6nbSI mZiudBgw+71J2yuWDGuzbMv0TwTdTMQEZ3l3CgsDMilCthKqNgr0QTAml mYKmU6AhA1Ih8doxtWtqKLQm7fvHSEcZF+mmGWBvjWtwy5PHb+sGNoqU5 qkDI/SUdCdg4eSXSLXYDoBIZk3zbG6+ByZHSEwoE3VB40I/rcjTxZoxCr t/FYRkfx0sZIH9i/+u54Ct+qSO40pcfDWgYs/Wsg/ID9/0fETzJJb/YJF A==; X-CSE-ConnectionGUID: vbHB/i4VTbeCJYotqmYhAQ== X-CSE-MsgGUID: v0I8D9AwSDax6RoS8VZRsQ== X-IronPort-AV: E=McAfee;i="6700,10204,11202"; a="29718244" X-IronPort-AV: E=Sophos;i="6.10,250,1719903600"; d="scan'208";a="29718244" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2024 20:59:39 -0700 X-CSE-ConnectionGUID: KIiWMSXfSPyXE2uA2DWKoA== X-CSE-MsgGUID: 5vNNpbThQIOzFpZOR9V3Xw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,250,1719903600"; d="scan'208";a="101667463" Received: from jraag-nuc8i7beh.iind.intel.com ([10.145.169.79]) by orviesa002.jf.intel.com with ESMTP; 22 Sep 2024 20:59:34 -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 v6 2/4] drm: Expose wedge recovery methods Date: Mon, 23 Sep 2024 09:28:24 +0530 Message-Id: <20240923035826.624196-3-raag.jadav@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240923035826.624196-1-raag.jadav@intel.com> References: <20240923035826.624196-1-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 | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index fb3bbb6adcd1..99767de9e685 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -508,6 +509,26 @@ 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 method, count = 0; + + for_each_set_bit(method, &dev->wedge_recovery, DRM_WEDGE_RECOVERY_MAX) + count += sysfs_emit_at(buf, count, "%s\n", recovery_method_name(method)); + + 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 +553,7 @@ 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;