1/**
  2 * \file drm_info.c
  3 * DRM info file implementations
  4 *
  5 * \author Ben Gamari <bgamari@gmail.com>
  6 */
  7
  8/*
  9 * Created: Sun Dec 21 13:09:50 2008 by bgamari@gmail.com
 10 *
 11 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 12 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 13 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
 14 * All Rights Reserved.
 15 *
 16 * Permission is hereby granted, free of charge, to any person obtaining a
 17 * copy of this software and associated documentation files (the "Software"),
 18 * to deal in the Software without restriction, including without limitation
 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 20 * and/or sell copies of the Software, and to permit persons to whom the
 21 * Software is furnished to do so, subject to the following conditions:
 22 *
 23 * The above copyright notice and this permission notice (including the next
 24 * paragraph) shall be included in all copies or substantial portions of the
 25 * Software.
 26 *
 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 33 * OTHER DEALINGS IN THE SOFTWARE.
 34 */
 35
 36#include <linux/seq_file.h>
 37#include <drm/drmP.h>
 38#include <drm/drm_gem.h>
 39
 40#include "drm_internal.h"
 41#include "drm_legacy.h"
 42
 43/**
 44 * Called when "/proc/dri/.../name" is read.
 45 *
 46 * Prints the device name together with the bus id if available.
 47 */
 48int drm_name_info(struct seq_file *m, void *data)
 49{
 50	struct drm_info_node *node = (struct drm_info_node *) m->private;
 51	struct drm_minor *minor = node->minor;
 52	struct drm_device *dev = minor->dev;
 53	struct drm_master *master;
 54
 55	mutex_lock(&dev->master_mutex);
 56	master = dev->master;
 57	seq_printf(m, "%s", dev->driver->name);
 58	if (dev->dev)
 59		seq_printf(m, " dev=%s", dev_name(dev->dev));
 60	if (master && master->unique)
 61		seq_printf(m, " master=%s", master->unique);
 62	if (dev->unique)
 63		seq_printf(m, " unique=%s", dev->unique);
 64	seq_printf(m, "\n");
 65	mutex_unlock(&dev->master_mutex);
 66
 67	return 0;
 68}
 69
 70/**
 71 * Called when "/proc/dri/.../clients" is read.
 72 *
 73 */
 74int drm_clients_info(struct seq_file *m, void *data)
 75{
 76	struct drm_info_node *node = (struct drm_info_node *) m->private;
 77	struct drm_device *dev = node->minor->dev;
 78	struct drm_file *priv;
 79	kuid_t uid;
 80
 81	seq_printf(m,
 82		   "%20s %5s %3s master a %5s %10s\n",
 83		   "command",
 84		   "pid",
 85		   "dev",
 86		   "uid",
 87		   "magic");
 88
 89	/* dev->filelist is sorted youngest first, but we want to present
 90	 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
 91	 */
 92	mutex_lock(&dev->filelist_mutex);
 93	list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
 94		struct task_struct *task;
 95
 96		rcu_read_lock(); /* locks pid_task()->comm */
 97		task = pid_task(priv->pid, PIDTYPE_PID);
 98		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
 99		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u\n",
100			   task ? task->comm : "<unknown>",
101			   pid_vnr(priv->pid),
102			   priv->minor->index,
103			   drm_is_current_master(priv) ? 'y' : 'n',
104			   priv->authenticated ? 'y' : 'n',
105			   from_kuid_munged(seq_user_ns(m), uid),
106			   priv->magic);
107		rcu_read_unlock();
108	}
109	mutex_unlock(&dev->filelist_mutex);
110	return 0;
111}
112
113static int drm_gem_one_name_info(int id, void *ptr, void *data)
114{
115	struct drm_gem_object *obj = ptr;
116	struct seq_file *m = data;
117
118	seq_printf(m, "%6d %8zd %7d %8d\n",
119		   obj->name, obj->size,
120		   obj->handle_count,
121		   kref_read(&obj->refcount));
122	return 0;
123}
124
125int drm_gem_name_info(struct seq_file *m, void *data)
126{
127	struct drm_info_node *node = (struct drm_info_node *) m->private;
128	struct drm_device *dev = node->minor->dev;
129
130	seq_printf(m, "  name     size handles refcount\n");
131
132	mutex_lock(&dev->object_name_lock);
133	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
134	mutex_unlock(&dev->object_name_lock);
135
136	return 0;
137}