LXR linux/drivers/gpu/drm/drm

   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}
 138