drivers/gpu/drm/drm_info.c

   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  */
  48 int 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  */
  74 int 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
 113 static 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
 125 int 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 }