From patchwork Tue Oct 27 17:30:20 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 56145 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n9RHVjI4009623 for ; Tue, 27 Oct 2009 17:31:45 GMT Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8FB1A9EFE1; Tue, 27 Oct 2009 10:31:45 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 8A6439ECC4 for ; Tue, 27 Oct 2009 10:31:41 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP; 27 Oct 2009 10:14:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.44,634,1249282800"; d="scan'208";a="563932997" Received: from unknown (HELO localhost.localdomain) ([10.255.16.48]) by orsmga001.jf.intel.com with ESMTP; 27 Oct 2009 10:30:39 -0700 From: Chris Wilson To: eric@anholt.net Date: Tue, 27 Oct 2009 17:30:20 +0000 Message-Id: <1256664620-25997-2-git-send-email-chris@chris-wilson.co.uk> X-Mailer: git-send-email 1.6.5 In-Reply-To: <1256664620-25997-1-git-send-email-chris@chris-wilson.co.uk> References: <1256664620-25997-1-git-send-email-chris@chris-wilson.co.uk> Cc: intel-gfx@lists.freedesktop.org Subject: [Intel-gfx] [PATCH] drm/i915: debugfs interface to manually reset the GPU X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index f8ce9a3..2ace8b7 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -27,6 +27,7 @@ */ #include +#include #include "drmP.h" #include "drm.h" #include "i915_drm.h" @@ -412,6 +413,109 @@ static int i915_registers_info(struct seq_file *m, void *data) { return 0; } +static int +i915_wedged_open(struct inode *inode, + struct file *filp) +{ + filp->private_data = inode->i_private; + return 0; +} + +static ssize_t +i915_wedged_read(struct file *filp, + char __user *ubuf, + size_t max, + loff_t *ppos) +{ + struct drm_device *dev = filp->private_data; + drm_i915_private_t *dev_priv = dev->dev_private; + char buf[80]; + int len; + + len = snprintf(buf, sizeof (buf), + "wedged : %d\n", + atomic_read(&dev_priv->mm.wedged)); + + return simple_read_from_buffer(ubuf, max, ppos, buf, len); +} + +static ssize_t +i915_wedged_write(struct file *filp, + const char __user *ubuf, + size_t cnt, + loff_t *ppos) +{ + struct drm_device *dev = filp->private_data; + drm_i915_private_t *dev_priv = dev->dev_private; + char buf[20]; + int val = 1; + + if (cnt > 0) { + if (cnt > sizeof (buf) - 1) + return -EINVAL; + + if (copy_from_user(buf, ubuf, cnt)) + return -EFAULT; + buf[cnt] = 0; + + val = simple_strtoul(buf, NULL, 0); + } + + DRM_INFO("Manually setting wedged to %d\n", val); + + atomic_set(&dev_priv->mm.wedged, val); + if (val) { + DRM_WAKEUP(&dev_priv->irq_queue); + queue_work(dev_priv->wq, &dev_priv->error_work); + } + + return cnt; +} + +static const struct file_operations i915_wedged_fops = { + .owner = THIS_MODULE, + .open = i915_wedged_open, + .read = i915_wedged_read, + .write = i915_wedged_write, +}; + +/* As the drm_debugfs_init() routines are called before dev->dev_private is + * allocated we need to hook into the minor for release. */ +static int +drm_add_fake_info_node(struct drm_minor *minor, + struct dentry *ent, + const void *key) +{ + struct drm_info_node *node; + + node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); + if (node == NULL) { + debugfs_remove(ent); + return -ENOMEM; + } + + node->minor = minor; + node->dent = ent; + node->info_ent = (void *) key; + list_add(&node->list, &minor->debugfs_nodes.list); + + return 0; +} + +static int i915_wedged_create(struct dentry *root, struct drm_minor *minor) +{ + struct drm_device *dev = minor->dev; + struct dentry *ent; + + ent = debugfs_create_file("i915_wedged", + S_IRUGO | S_IWUSR, + root, dev, + &i915_wedged_fops); + if (IS_ERR(ent)) + return PTR_ERR(ent); + + return drm_add_fake_info_node(minor, ent, &i915_wedged_fops); +} static struct drm_info_list i915_debugfs_list[] = { {"i915_regs", i915_registers_info, 0}, @@ -432,6 +536,12 @@ static struct drm_info_list i915_debugfs_list[] = { int i915_debugfs_init(struct drm_minor *minor) { + int ret; + + ret = i915_wedged_create(minor->debugfs_root, minor); + if (ret) + return ret; + return drm_debugfs_create_files(i915_debugfs_list, I915_DEBUGFS_ENTRIES, minor->debugfs_root, minor); @@ -439,9 +549,13 @@ int i915_debugfs_init(struct drm_minor *minor) void i915_debugfs_cleanup(struct drm_minor *minor) { + const void *key; + drm_debugfs_remove_files(i915_debugfs_list, I915_DEBUGFS_ENTRIES, minor); + + key = &i915_wedged_fops; + drm_debugfs_remove_files((struct drm_info_list *) &key, 1, minor); } #endif /* CONFIG_DEBUG_FS */ -