2c935bc572
Since we need to change the implementation, stop exposing internals. Provide kref_read() to read the current reference count; typically used for debug messages. Kills two anti-patterns: atomic_read(&kref->refcount) kref->refcount.counter Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/**
|
|
* \file drm_info.c
|
|
* DRM info file implementations
|
|
*
|
|
* \author Ben Gamari <bgamari@gmail.com>
|
|
*/
|
|
|
|
/*
|
|
* Created: Sun Dec 21 13:09:50 2008 by bgamari@gmail.com
|
|
*
|
|
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* Copyright 2008 Ben Gamari <bgamari@gmail.com>
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/seq_file.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_gem.h>
|
|
|
|
#include "drm_internal.h"
|
|
#include "drm_legacy.h"
|
|
|
|
/**
|
|
* Called when "/proc/dri/.../name" is read.
|
|
*
|
|
* Prints the device name together with the bus id if available.
|
|
*/
|
|
int drm_name_info(struct seq_file *m, void *data)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_minor *minor = node->minor;
|
|
struct drm_device *dev = minor->dev;
|
|
struct drm_master *master;
|
|
|
|
mutex_lock(&dev->master_mutex);
|
|
master = dev->master;
|
|
seq_printf(m, "%s", dev->driver->name);
|
|
if (dev->dev)
|
|
seq_printf(m, " dev=%s", dev_name(dev->dev));
|
|
if (master && master->unique)
|
|
seq_printf(m, " master=%s", master->unique);
|
|
if (dev->unique)
|
|
seq_printf(m, " unique=%s", dev->unique);
|
|
seq_printf(m, "\n");
|
|
mutex_unlock(&dev->master_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Called when "/proc/dri/.../clients" is read.
|
|
*
|
|
*/
|
|
int drm_clients_info(struct seq_file *m, void *data)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
struct drm_file *priv;
|
|
kuid_t uid;
|
|
|
|
seq_printf(m,
|
|
"%20s %5s %3s master a %5s %10s\n",
|
|
"command",
|
|
"pid",
|
|
"dev",
|
|
"uid",
|
|
"magic");
|
|
|
|
/* dev->filelist is sorted youngest first, but we want to present
|
|
* oldest first (i.e. kernel, servers, clients), so walk backwardss.
|
|
*/
|
|
mutex_lock(&dev->filelist_mutex);
|
|
list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
|
|
struct task_struct *task;
|
|
|
|
rcu_read_lock(); /* locks pid_task()->comm */
|
|
task = pid_task(priv->pid, PIDTYPE_PID);
|
|
uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
|
|
seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
|
|
task ? task->comm : "<unknown>",
|
|
pid_vnr(priv->pid),
|
|
priv->minor->index,
|
|
drm_is_current_master(priv) ? 'y' : 'n',
|
|
priv->authenticated ? 'y' : 'n',
|
|
from_kuid_munged(seq_user_ns(m), uid),
|
|
priv->magic);
|
|
rcu_read_unlock();
|
|
}
|
|
mutex_unlock(&dev->filelist_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int drm_gem_one_name_info(int id, void *ptr, void *data)
|
|
{
|
|
struct drm_gem_object *obj = ptr;
|
|
struct seq_file *m = data;
|
|
|
|
seq_printf(m, "%6d %8zd %7d %8d\n",
|
|
obj->name, obj->size,
|
|
obj->handle_count,
|
|
kref_read(&obj->refcount));
|
|
return 0;
|
|
}
|
|
|
|
int drm_gem_name_info(struct seq_file *m, void *data)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
|
|
seq_printf(m, " name size handles refcount\n");
|
|
|
|
mutex_lock(&dev->object_name_lock);
|
|
idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
|
|
mutex_unlock(&dev->object_name_lock);
|
|
|
|
return 0;
|
|
}
|