drivers/gpu/drm/drm_info.c - kernel/msm-4.9 - Gitiles

 /**
  * \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 "drmP.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 = minor->master;

 	if (!master)
 		return 0;

 	if (master->unique) {
 		seq_printf(m, "%s %s %s\n",
 			   dev->driver->pci_driver.name,
 			   pci_name(dev->pdev), master->unique);
 	} else {
 		seq_printf(m, "%s %s\n", dev->driver->pci_driver.name,
 			   pci_name(dev->pdev));
 	}

 	return 0;
 }

 /**
  * Called when "/proc/dri/.../vm" is read.
  *
  * Prints information about all mappings in drm_device::maplist.
  */
 int drm_vm_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_local_map *map;
 	struct drm_map_list *r_list;

 	/* Hardcoded from _DRM_FRAME_BUFFER,
 	   _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 	   _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 	const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 	const char *type;
 	int i;

 	mutex_lock(&dev->struct_mutex);
 	seq_printf(m, "slot	 offset	      size type flags	 address mtrr\n\n");
 	i = 0;
 	list_for_each_entry(r_list, &dev->maplist, head) {
 		map = r_list->map;
 		if (!map)
 			continue;
 		if (map->type < 0 || map->type > 5)
 			type = "??";
 		else
 			type = types[map->type];

 		seq_printf(m, "%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 			   i,
 			   (unsigned long long)map->offset,
 			   map->size, type, map->flags,
 			   (unsigned long) r_list->user_token);
 		if (map->mtrr < 0)
 			seq_printf(m, "none\n");
 		else
 			seq_printf(m, "%4d\n", map->mtrr);
 		i++;
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }

 /**
  * Called when "/proc/dri/.../queues" is read.
  */
 int drm_queues_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;
 	int i;
 	struct drm_queue *q;

 	mutex_lock(&dev->struct_mutex);
 	seq_printf(m, "  ctx/flags   use   fin"
 		   "   blk/rw/rwf  wait    flushed	   queued"
 		   "      locks\n\n");
 	for (i = 0; i < dev->queue_count; i++) {
 		q = dev->queuelist[i];
 		atomic_inc(&q->use_count);
 		seq_printf(m,   "%5d/0x%03x %5d %5d"
 			   " %5d/%c%c/%c%c%c %5Zd\n",
 			   i,
 			   q->flags,
 			   atomic_read(&q->use_count),
 			   atomic_read(&q->finalization),
 			   atomic_read(&q->block_count),
 			   atomic_read(&q->block_read) ? 'r' : '-',
 			   atomic_read(&q->block_write) ? 'w' : '-',
 			   waitqueue_active(&q->read_queue) ? 'r' : '-',
 			   waitqueue_active(&q->write_queue) ? 'w' : '-',
 			   waitqueue_active(&q->flush_queue) ? 'f' : '-',
 			   DRM_BUFCOUNT(&q->waitlist));
 		atomic_dec(&q->use_count);
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }

 /**
  * Called when "/proc/dri/.../bufs" is read.
  */
 int drm_bufs_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_device_dma *dma;
 	int i, seg_pages;

 	mutex_lock(&dev->struct_mutex);
 	dma = dev->dma;
 	if (!dma) {
 		mutex_unlock(&dev->struct_mutex);
 		return 0;
 	}

 	seq_printf(m, " o     size count  free	 segs pages    kB\n\n");
 	for (i = 0; i <= DRM_MAX_ORDER; i++) {
 		if (dma->bufs[i].buf_count) {
 			seg_pages = dma->bufs[i].seg_count * (1 << dma->bufs[i].page_order);
 			seq_printf(m, "%2d %8d %5d %5d %5d %5d %5ld\n",
 				   i,
 				   dma->bufs[i].buf_size,
 				   dma->bufs[i].buf_count,
 				   atomic_read(&dma->bufs[i].freelist.count),
 				   dma->bufs[i].seg_count,
 				   seg_pages,
 				   seg_pages * PAGE_SIZE / 1024);
 		}
 	}
 	seq_printf(m, "\n");
 	for (i = 0; i < dma->buf_count; i++) {
 		if (i && !(i % 32))
 			seq_printf(m, "\n");
 		seq_printf(m, " %d", dma->buflist[i]->list);
 	}
 	seq_printf(m, "\n");
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }

 /**
  * Called when "/proc/dri/.../vblank" is read.
  */
 int drm_vblank_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;
 	int crtc;

 	mutex_lock(&dev->struct_mutex);
 	for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
 		seq_printf(m, "CRTC %d enable:     %d\n",
 			   crtc, atomic_read(&dev->vblank_refcount[crtc]));
 		seq_printf(m, "CRTC %d counter:    %d\n",
 			   crtc, drm_vblank_count(dev, crtc));
 		seq_printf(m, "CRTC %d last wait:  %d\n",
 			   crtc, dev->last_vblank_wait[crtc]);
 		seq_printf(m, "CRTC %d in modeset: %d\n",
 			   crtc, dev->vblank_inmodeset[crtc]);
 	}
 	mutex_unlock(&dev->struct_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;

 	mutex_lock(&dev->struct_mutex);
 	seq_printf(m, "a dev	pid    uid	magic	  ioctls\n\n");
 	list_for_each_entry(priv, &dev->filelist, lhead) {
 		seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
 			   priv->authenticated ? 'y' : 'n',
 			   priv->minor->index,
 			   priv->pid,
 			   priv->uid, priv->magic, priv->ioctl_count);
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }


 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, "name %d size %zd\n", obj->name, obj->size);

 	seq_printf(m, "%6d %8zd %7d %8d\n",
 		   obj->name, obj->size,
 		   atomic_read(&obj->handlecount.refcount),
 		   atomic_read(&obj->refcount.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");
 	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
 	return 0;
 }

 int drm_gem_object_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, "%d objects\n", atomic_read(&dev->object_count));
 	seq_printf(m, "%d object bytes\n", atomic_read(&dev->object_memory));
 	seq_printf(m, "%d pinned\n", atomic_read(&dev->pin_count));
 	seq_printf(m, "%d pin bytes\n", atomic_read(&dev->pin_memory));
 	seq_printf(m, "%d gtt bytes\n", atomic_read(&dev->gtt_memory));
 	seq_printf(m, "%d gtt total\n", dev->gtt_total);
 	return 0;
 }

 #if DRM_DEBUG_CODE

 int drm_vma_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_vma_entry *pt;
 	struct vm_area_struct *vma;
 #if defined(__i386__)
 	unsigned int pgprot;
 #endif

 	mutex_lock(&dev->struct_mutex);
 	seq_printf(m, "vma use count: %d, high_memory = %p, 0x%08llx\n",
 		   atomic_read(&dev->vma_count),
 		   high_memory, (u64)virt_to_phys(high_memory));

 	list_for_each_entry(pt, &dev->vmalist, head) {
 		vma = pt->vma;
 		if (!vma)
 			continue;
 		seq_printf(m,
 			   "\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
 			   pt->pid, vma->vm_start, vma->vm_end,
 			   vma->vm_flags & VM_READ ? 'r' : '-',
 			   vma->vm_flags & VM_WRITE ? 'w' : '-',
 			   vma->vm_flags & VM_EXEC ? 'x' : '-',
 			   vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 			   vma->vm_flags & VM_LOCKED ? 'l' : '-',
 			   vma->vm_flags & VM_IO ? 'i' : '-',
 			   vma->vm_pgoff);

 #if defined(__i386__)
 		pgprot = pgprot_val(vma->vm_page_prot);
 		seq_printf(m, " %c%c%c%c%c%c%c%c%c",
 			   pgprot & _PAGE_PRESENT ? 'p' : '-',
 			   pgprot & _PAGE_RW ? 'w' : 'r',
 			   pgprot & _PAGE_USER ? 'u' : 's',
 			   pgprot & _PAGE_PWT ? 't' : 'b',
 			   pgprot & _PAGE_PCD ? 'u' : 'c',
 			   pgprot & _PAGE_ACCESSED ? 'a' : '-',
 			   pgprot & _PAGE_DIRTY ? 'd' : '-',
 			   pgprot & _PAGE_PSE ? 'm' : 'k',
 			   pgprot & _PAGE_GLOBAL ? 'g' : 'l');
 #endif
 		seq_printf(m, "\n");
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }

 #endif
	/**
	* \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 "drmP.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 = minor->master;

	if (!master)
	return 0;

	if (master->unique) {
	seq_printf(m, "%s %s %s\n",
	dev->driver->pci_driver.name,
	pci_name(dev->pdev), master->unique);
	} else {
	seq_printf(m, "%s %s\n", dev->driver->pci_driver.name,
	pci_name(dev->pdev));
	}

	return 0;
	}

	/**
	* Called when "/proc/dri/.../vm" is read.
	*
	* Prints information about all mappings in drm_device::maplist.
	*/
	int drm_vm_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_local_map *map;
	struct drm_map_list *r_list;

	/* Hardcoded from _DRM_FRAME_BUFFER,
	_DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
	_DRM_SCATTER_GATHER and _DRM_CONSISTENT */
	const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
	const char *type;
	int i;

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, "slot offset size type flags address mtrr\n\n");
	i = 0;
	list_for_each_entry(r_list, &dev->maplist, head) {
	map = r_list->map;
	if (!map)
	continue;
	if (map->type < 0 \|\| map->type > 5)
	type = "??";
	else
	type = types[map->type];

	seq_printf(m, "%4d 0x%016llx 0x%08lx %4.4s 0x%02x 0x%08lx ",
	i,
	(unsigned long long)map->offset,
	map->size, type, map->flags,
	(unsigned long) r_list->user_token);
	if (map->mtrr < 0)
	seq_printf(m, "none\n");
	else
	seq_printf(m, "%4d\n", map->mtrr);
	i++;
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}

	/**
	* Called when "/proc/dri/.../queues" is read.
	*/
	int drm_queues_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;
	int i;
	struct drm_queue *q;

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, " ctx/flags use fin"
	" blk/rw/rwf wait flushed queued"
	" locks\n\n");
	for (i = 0; i < dev->queue_count; i++) {
	q = dev->queuelist[i];
	atomic_inc(&q->use_count);
	seq_printf(m, "%5d/0x%03x %5d %5d"
	" %5d/%c%c/%c%c%c %5Zd\n",
	i,
	q->flags,
	atomic_read(&q->use_count),
	atomic_read(&q->finalization),
	atomic_read(&q->block_count),
	atomic_read(&q->block_read) ? 'r' : '-',
	atomic_read(&q->block_write) ? 'w' : '-',
	waitqueue_active(&q->read_queue) ? 'r' : '-',
	waitqueue_active(&q->write_queue) ? 'w' : '-',
	waitqueue_active(&q->flush_queue) ? 'f' : '-',
	DRM_BUFCOUNT(&q->waitlist));
	atomic_dec(&q->use_count);
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}

	/**
	* Called when "/proc/dri/.../bufs" is read.
	*/
	int drm_bufs_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_device_dma *dma;
	int i, seg_pages;

	mutex_lock(&dev->struct_mutex);
	dma = dev->dma;
	if (!dma) {
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}

	seq_printf(m, " o size count free segs pages kB\n\n");
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
	if (dma->bufs[i].buf_count) {
	seg_pages = dma->bufs[i].seg_count * (1 << dma->bufs[i].page_order);
	seq_printf(m, "%2d %8d %5d %5d %5d %5d %5ld\n",
	i,
	dma->bufs[i].buf_size,
	dma->bufs[i].buf_count,
	atomic_read(&dma->bufs[i].freelist.count),
	dma->bufs[i].seg_count,
	seg_pages,
	seg_pages * PAGE_SIZE / 1024);
	}
	}
	seq_printf(m, "\n");
	for (i = 0; i < dma->buf_count; i++) {
	if (i && !(i % 32))
	seq_printf(m, "\n");
	seq_printf(m, " %d", dma->buflist[i]->list);
	}
	seq_printf(m, "\n");
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}

	/**
	* Called when "/proc/dri/.../vblank" is read.
	*/
	int drm_vblank_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;
	int crtc;

	mutex_lock(&dev->struct_mutex);
	for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
	seq_printf(m, "CRTC %d enable: %d\n",
	crtc, atomic_read(&dev->vblank_refcount[crtc]));
	seq_printf(m, "CRTC %d counter: %d\n",
	crtc, drm_vblank_count(dev, crtc));
	seq_printf(m, "CRTC %d last wait: %d\n",
	crtc, dev->last_vblank_wait[crtc]);
	seq_printf(m, "CRTC %d in modeset: %d\n",
	crtc, dev->vblank_inmodeset[crtc]);
	}
	mutex_unlock(&dev->struct_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;

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, "a dev pid uid magic ioctls\n\n");
	list_for_each_entry(priv, &dev->filelist, lhead) {
	seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
	priv->authenticated ? 'y' : 'n',
	priv->minor->index,
	priv->pid,
	priv->uid, priv->magic, priv->ioctl_count);
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}


	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, "name %d size %zd\n", obj->name, obj->size);

	seq_printf(m, "%6d %8zd %7d %8d\n",
	obj->name, obj->size,
	atomic_read(&obj->handlecount.refcount),
	atomic_read(&obj->refcount.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");
	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
	return 0;
	}

	int drm_gem_object_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, "%d objects\n", atomic_read(&dev->object_count));
	seq_printf(m, "%d object bytes\n", atomic_read(&dev->object_memory));
	seq_printf(m, "%d pinned\n", atomic_read(&dev->pin_count));
	seq_printf(m, "%d pin bytes\n", atomic_read(&dev->pin_memory));
	seq_printf(m, "%d gtt bytes\n", atomic_read(&dev->gtt_memory));
	seq_printf(m, "%d gtt total\n", dev->gtt_total);
	return 0;
	}

	#if DRM_DEBUG_CODE

	int drm_vma_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_vma_entry *pt;
	struct vm_area_struct *vma;
	#if defined(__i386__)
	unsigned int pgprot;
	#endif

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, "vma use count: %d, high_memory = %p, 0x%08llx\n",
	atomic_read(&dev->vma_count),
	high_memory, (u64)virt_to_phys(high_memory));

	list_for_each_entry(pt, &dev->vmalist, head) {
	vma = pt->vma;
	if (!vma)
	continue;
	seq_printf(m,
	"\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
	pt->pid, vma->vm_start, vma->vm_end,
	vma->vm_flags & VM_READ ? 'r' : '-',
	vma->vm_flags & VM_WRITE ? 'w' : '-',
	vma->vm_flags & VM_EXEC ? 'x' : '-',
	vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
	vma->vm_flags & VM_LOCKED ? 'l' : '-',
	vma->vm_flags & VM_IO ? 'i' : '-',
	vma->vm_pgoff);

	#if defined(__i386__)
	pgprot = pgprot_val(vma->vm_page_prot);
	seq_printf(m, " %c%c%c%c%c%c%c%c%c",
	pgprot & _PAGE_PRESENT ? 'p' : '-',
	pgprot & _PAGE_RW ? 'w' : 'r',
	pgprot & _PAGE_USER ? 'u' : 's',
	pgprot & _PAGE_PWT ? 't' : 'b',
	pgprot & _PAGE_PCD ? 'u' : 'c',
	pgprot & _PAGE_ACCESSED ? 'a' : '-',
	pgprot & _PAGE_DIRTY ? 'd' : '-',
	pgprot & _PAGE_PSE ? 'm' : 'k',
	pgprot & _PAGE_GLOBAL ? 'g' : 'l');
	#endif
	seq_printf(m, "\n");
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
	}

	#endif