[linux.git] / drivers / pci / proc.c

/*
 *	$Id: proc.c,v 1.13 1998/05/12 07:36:07 mj Exp $
 *
 *	Procfs interface for the PCI bus.
 *
 *	Copyright (c) 1997--1999 Martin Mares <[email protected]>
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include "pci.h"

static int proc_initialized;	/* = 0 */

static loff_t
proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
{
	loff_t new = -1;
	struct inode *inode = file->f_path.dentry->d_inode;

	mutex_lock(&inode->i_mutex);
	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	case 2:
		new = inode->i_size + off;
		break;
	}
	if (new < 0 || new > inode->i_size)
		new = -EINVAL;
	else
		file->f_pos = new;
	mutex_unlock(&inode->i_mutex);
	return new;
}

static ssize_t
proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
{
	const struct inode *ino = file->f_path.dentry->d_inode;
	const struct proc_dir_entry *dp = PDE(ino);
	struct pci_dev *dev = dp->data;
	unsigned int pos = *ppos;
	unsigned int cnt, size;

	/*
	 * Normal users can read only the standardized portion of the
	 * configuration space as several chips lock up when trying to read
	 * undefined locations (think of Intel PIIX4 as a typical example).
	 */

	if (capable(CAP_SYS_ADMIN))
		size = dev->cfg_size;
	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
		size = 128;
	else
		size = 64;

	if (pos >= size)
		return 0;
	if (nbytes >= size)
		nbytes = size;
	if (pos + nbytes > size)
		nbytes = size - pos;
	cnt = nbytes;

	if (!access_ok(VERIFY_WRITE, buf, cnt))
		return -EINVAL;

	if ((pos & 1) && cnt) {
		unsigned char val;
		pci_user_read_config_byte(dev, pos, &val);
		__put_user(val, buf);
		buf++;
		pos++;
		cnt--;
	}

	if ((pos & 3) && cnt > 2) {
		unsigned short val;
		pci_user_read_config_word(dev, pos, &val);
		__put_user(cpu_to_le16(val), (unsigned short __user *) buf);
		buf += 2;
		pos += 2;
		cnt -= 2;
	}

	while (cnt >= 4) {
		unsigned int val;
		pci_user_read_config_dword(dev, pos, &val);
		__put_user(cpu_to_le32(val), (unsigned int __user *) buf);
		buf += 4;
		pos += 4;
		cnt -= 4;
	}

	if (cnt >= 2) {
		unsigned short val;
		pci_user_read_config_word(dev, pos, &val);
		__put_user(cpu_to_le16(val), (unsigned short __user *) buf);
		buf += 2;
		pos += 2;
		cnt -= 2;
	}

	if (cnt) {
		unsigned char val;
		pci_user_read_config_byte(dev, pos, &val);
		__put_user(val, buf);
		buf++;
		pos++;
		cnt--;
	}

	*ppos = pos;
	return nbytes;
}

static ssize_t
proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos)
{
	const struct inode *ino = file->f_path.dentry->d_inode;
	const struct proc_dir_entry *dp = PDE(ino);
	struct pci_dev *dev = dp->data;
	int pos = *ppos;
	int size = dev->cfg_size;
	int cnt;

	if (pos >= size)
		return 0;
	if (nbytes >= size)
		nbytes = size;
	if (pos + nbytes > size)
		nbytes = size - pos;
	cnt = nbytes;

	if (!access_ok(VERIFY_READ, buf, cnt))
		return -EINVAL;

	if ((pos & 1) && cnt) {
		unsigned char val;
		__get_user(val, buf);
		pci_user_write_config_byte(dev, pos, val);
		buf++;
		pos++;
		cnt--;
	}

	if ((pos & 3) && cnt > 2) {
		unsigned short val;
		__get_user(val, (unsigned short __user *) buf);
		pci_user_write_config_word(dev, pos, le16_to_cpu(val));
		buf += 2;
		pos += 2;
		cnt -= 2;
	}

	while (cnt >= 4) {
		unsigned int val;
		__get_user(val, (unsigned int __user *) buf);
		pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
		buf += 4;
		pos += 4;
		cnt -= 4;
	}

	if (cnt >= 2) {
		unsigned short val;
		__get_user(val, (unsigned short __user *) buf);
		pci_user_write_config_word(dev, pos, le16_to_cpu(val));
		buf += 2;
		pos += 2;
		cnt -= 2;
	}

	if (cnt) {
		unsigned char val;
		__get_user(val, buf);
		pci_user_write_config_byte(dev, pos, val);
		buf++;
		pos++;
		cnt--;
	}

	*ppos = pos;
	return nbytes;
}

struct pci_filp_private {
	enum pci_mmap_state mmap_state;
	int write_combine;
};

static int proc_bus_pci_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	const struct proc_dir_entry *dp = PDE(inode);
	struct pci_dev *dev = dp->data;
#ifdef HAVE_PCI_MMAP
	struct pci_filp_private *fpriv = file->private_data;
#endif /* HAVE_PCI_MMAP */
	int ret = 0;

	switch (cmd) {
	case PCIIOC_CONTROLLER:
		ret = pci_domain_nr(dev->bus);
		break;

#ifdef HAVE_PCI_MMAP
	case PCIIOC_MMAP_IS_IO:
		fpriv->mmap_state = pci_mmap_io;
		break;

	case PCIIOC_MMAP_IS_MEM:
		fpriv->mmap_state = pci_mmap_mem;
		break;

	case PCIIOC_WRITE_COMBINE:
		if (arg)
			fpriv->write_combine = 1;
		else
			fpriv->write_combine = 0;
		break;

#endif /* HAVE_PCI_MMAP */

	default:
		ret = -EINVAL;
		break;
	};

	return ret;
}

#ifdef HAVE_PCI_MMAP
static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct inode *inode = file->f_path.dentry->d_inode;
	const struct proc_dir_entry *dp = PDE(inode);
	struct pci_dev *dev = dp->data;
	struct pci_filp_private *fpriv = file->private_data;
	int ret;

	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;

	ret = pci_mmap_page_range(dev, vma,
				  fpriv->mmap_state,
				  fpriv->write_combine);
	if (ret < 0)
		return ret;

	return 0;
}

static int proc_bus_pci_open(struct inode *inode, struct file *file)
{
	struct pci_filp_private *fpriv = kmalloc(sizeof(*fpriv), GFP_KERNEL);

	if (!fpriv)
		return -ENOMEM;

	fpriv->mmap_state = pci_mmap_io;
	fpriv->write_combine = 0;

	file->private_data = fpriv;

	return 0;
}

static int proc_bus_pci_release(struct inode *inode, struct file *file)
{
	kfree(file->private_data);
	file->private_data = NULL;

	return 0;
}
#endif /* HAVE_PCI_MMAP */

static const struct file_operations proc_bus_pci_operations = {
	.llseek		= proc_bus_pci_lseek,
	.read		= proc_bus_pci_read,
	.write		= proc_bus_pci_write,
	.ioctl		= proc_bus_pci_ioctl,
#ifdef HAVE_PCI_MMAP
	.open		= proc_bus_pci_open,
	.release	= proc_bus_pci_release,
	.mmap		= proc_bus_pci_mmap,
#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
	.get_unmapped_area = get_pci_unmapped_area,
#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
#endif /* HAVE_PCI_MMAP */
};

/* iterator */
static void *pci_seq_start(struct seq_file *m, loff_t *pos)
{
	struct pci_dev *dev = NULL;
	loff_t n = *pos;

	for_each_pci_dev(dev) {
		if (!n--)
			break;
	}
	return dev;
}

static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct pci_dev *dev = v;

	(*pos)++;
	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
	return dev;
}

static void pci_seq_stop(struct seq_file *m, void *v)
{
	if (v) {
		struct pci_dev *dev = v;
		pci_dev_put(dev);
	}
}

static int show_device(struct seq_file *m, void *v)
{
	const struct pci_dev *dev = v;
	const struct pci_driver *drv;
	int i;

	if (dev == NULL)
		return 0;

	drv = pci_dev_driver(dev);
	seq_printf(m, "%02x%02x\t%04x%04x\t%x",
			dev->bus->number,
			dev->devfn,
			dev->vendor,
			dev->device,
			dev->irq);
	/* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
	for (i=0; i<7; i++) {
		resource_size_t start, end;
		pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
		seq_printf(m, "\t%16llx",
			(unsigned long long)(start |
			(dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
	}
	for (i=0; i<7; i++) {
		resource_size_t start, end;
		pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
		seq_printf(m, "\t%16llx",
			dev->resource[i].start < dev->resource[i].end ?
			(unsigned long long)(end - start) + 1 : 0);
	}
	seq_putc(m, '\t');
	if (drv)
		seq_printf(m, "%s", drv->name);
	seq_putc(m, '\n');
	return 0;
}

static struct seq_operations proc_bus_pci_devices_op = {
	.start	= pci_seq_start,
	.next	= pci_seq_next,
	.stop	= pci_seq_stop,
	.show	= show_device
};

static struct proc_dir_entry *proc_bus_pci_dir;

int pci_proc_attach_device(struct pci_dev *dev)
{
	struct pci_bus *bus = dev->bus;
	struct proc_dir_entry *e;
	char name[16];

	if (!proc_initialized)
		return -EACCES;

	if (!bus->procdir) {
		if (pci_proc_domain(bus)) {
			sprintf(name, "%04x:%02x", pci_domain_nr(bus),
					bus->number);
		} else {
			sprintf(name, "%02x", bus->number);
		}
		bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
		if (!bus->procdir)
			return -ENOMEM;
	}

	sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
	e = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir);
	if (!e)
		return -ENOMEM;
	e->proc_fops = &proc_bus_pci_operations;
	e->data = dev;
	e->size = dev->cfg_size;
	dev->procent = e;

	return 0;
}

int pci_proc_detach_device(struct pci_dev *dev)
{
	struct proc_dir_entry *e;

	if ((e = dev->procent)) {
		if (atomic_read(&e->count))
			return -EBUSY;
		remove_proc_entry(e->name, dev->bus->procdir);
		dev->procent = NULL;
	}
	return 0;
}

#if 0
int pci_proc_attach_bus(struct pci_bus* bus)
{
	struct proc_dir_entry *de = bus->procdir;

	if (!proc_initialized)
		return -EACCES;

	if (!de) {
		char name[16];
		sprintf(name, "%02x", bus->number);
		de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
		if (!de)
			return -ENOMEM;
	}
	return 0;
}
#endif  /*  0  */

int pci_proc_detach_bus(struct pci_bus* bus)
{
	struct proc_dir_entry *de = bus->procdir;
	if (de)
		remove_proc_entry(de->name, proc_bus_pci_dir);
	return 0;
}

static int proc_bus_pci_dev_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &proc_bus_pci_devices_op);
}
static const struct file_operations proc_bus_pci_dev_operations = {
	.open		= proc_bus_pci_dev_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int __init pci_proc_init(void)
{
	struct proc_dir_entry *entry;
	struct pci_dev *dev = NULL;
	proc_bus_pci_dir = proc_mkdir("pci", proc_bus);
	entry = create_proc_entry("devices", 0, proc_bus_pci_dir);
	if (entry)
		entry->proc_fops = &proc_bus_pci_dev_operations;
	proc_initialized = 1;
	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
		pci_proc_attach_device(dev);
	}
	return 0;
}

__initcall(pci_proc_init);

#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_proc_attach_device);
EXPORT_SYMBOL(pci_proc_detach_bus);
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: proc.c,v 1.13 1998/05/12 07:36:07 mj Exp $
	3	*
	4	* Procfs interface for the PCI bus.
	5	*
	6	* Copyright (c) 1997--1999 Martin Mares <[email protected]>
	7	*/
	8
	9	#include <linux/init.h>
	10	#include <linux/pci.h>
	11	#include <linux/module.h>
	12	#include <linux/proc_fs.h>
	13	#include <linux/seq_file.h>
1da177e4 LT	14
	15	#include <asm/uaccess.h>
	16	#include <asm/byteorder.h>
bc56b9e0	17	#include "pci.h"
1da177e4 LT	18
	19	static int proc_initialized; /* = 0 */
	20
	21	static loff_t
	22	proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
	23	{
	24	loff_t new = -1;
46cc65a7	25	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4	26
1b1dcc1b	27	mutex_lock(&inode->i_mutex);
1da177e4 LT	28	switch (whence) {
	29	case 0:
	30	new = off;
	31	break;
	32	case 1:
	33	new = file->f_pos + off;
	34	break;
	35	case 2:
	36	new = inode->i_size + off;
	37	break;
	38	}
	39	if (new < 0 \|\| new > inode->i_size)
	40	new = -EINVAL;
	41	else
	42	file->f_pos = new;
1b1dcc1b	43	mutex_unlock(&inode->i_mutex);
1da177e4 LT	44	return new;
	45	}
	46
	47	static ssize_t
	48	proc_bus_pci_read(struct file file, char __user buf, size_t nbytes, loff_t *ppos)
	49	{
46cc65a7	50	const struct inode *ino = file->f_path.dentry->d_inode;
1da177e4 LT	51	const struct proc_dir_entry *dp = PDE(ino);
	52	struct pci_dev *dev = dp->data;
	53	unsigned int pos = *ppos;
	54	unsigned int cnt, size;
	55
	56	/*
	57	* Normal users can read only the standardized portion of the
	58	* configuration space as several chips lock up when trying to read
	59	* undefined locations (think of Intel PIIX4 as a typical example).
	60	*/
	61
	62	if (capable(CAP_SYS_ADMIN))
	63	size = dev->cfg_size;
	64	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
	65	size = 128;
	66	else
	67	size = 64;
	68
	69	if (pos >= size)
	70	return 0;
	71	if (nbytes >= size)
	72	nbytes = size;
	73	if (pos + nbytes > size)
	74	nbytes = size - pos;
	75	cnt = nbytes;
	76
	77	if (!access_ok(VERIFY_WRITE, buf, cnt))
	78	return -EINVAL;
	79
	80	if ((pos & 1) && cnt) {
	81	unsigned char val;
e04b0ea2	82	pci_user_read_config_byte(dev, pos, &val);
1da177e4 LT	83	__put_user(val, buf);
	84	buf++;
	85	pos++;
	86	cnt--;
	87	}
	88
	89	if ((pos & 3) && cnt > 2) {
	90	unsigned short val;
e04b0ea2	91	pci_user_read_config_word(dev, pos, &val);
1da177e4 LT	92	__put_user(cpu_to_le16(val), (unsigned short __user *) buf);
	93	buf += 2;
	94	pos += 2;
	95	cnt -= 2;
	96	}
	97
	98	while (cnt >= 4) {
	99	unsigned int val;
e04b0ea2	100	pci_user_read_config_dword(dev, pos, &val);
1da177e4 LT	101	__put_user(cpu_to_le32(val), (unsigned int __user *) buf);
	102	buf += 4;
	103	pos += 4;
	104	cnt -= 4;
	105	}
	106
	107	if (cnt >= 2) {
	108	unsigned short val;
e04b0ea2	109	pci_user_read_config_word(dev, pos, &val);
1da177e4 LT	110	__put_user(cpu_to_le16(val), (unsigned short __user *) buf);
	111	buf += 2;
	112	pos += 2;
	113	cnt -= 2;
	114	}
	115
	116	if (cnt) {
	117	unsigned char val;
e04b0ea2	118	pci_user_read_config_byte(dev, pos, &val);
1da177e4 LT	119	__put_user(val, buf);
	120	buf++;
	121	pos++;
	122	cnt--;
	123	}
	124
	125	*ppos = pos;
	126	return nbytes;
	127	}
	128
	129	static ssize_t
	130	proc_bus_pci_write(struct file file, const char __user buf, size_t nbytes, loff_t *ppos)
	131	{
46cc65a7	132	const struct inode *ino = file->f_path.dentry->d_inode;
1da177e4 LT	133	const struct proc_dir_entry *dp = PDE(ino);
	134	struct pci_dev *dev = dp->data;
	135	int pos = *ppos;
	136	int size = dev->cfg_size;
	137	int cnt;
	138
	139	if (pos >= size)
	140	return 0;
	141	if (nbytes >= size)
	142	nbytes = size;
	143	if (pos + nbytes > size)
	144	nbytes = size - pos;
	145	cnt = nbytes;
	146
	147	if (!access_ok(VERIFY_READ, buf, cnt))
	148	return -EINVAL;
	149
	150	if ((pos & 1) && cnt) {
	151	unsigned char val;
	152	__get_user(val, buf);
e04b0ea2	153	pci_user_write_config_byte(dev, pos, val);
1da177e4 LT	154	buf++;
	155	pos++;
	156	cnt--;
	157	}
	158
	159	if ((pos & 3) && cnt > 2) {
	160	unsigned short val;
	161	__get_user(val, (unsigned short __user *) buf);
e04b0ea2	162	pci_user_write_config_word(dev, pos, le16_to_cpu(val));
1da177e4 LT	163	buf += 2;
	164	pos += 2;
	165	cnt -= 2;
	166	}
	167
	168	while (cnt >= 4) {
	169	unsigned int val;
	170	__get_user(val, (unsigned int __user *) buf);
e04b0ea2	171	pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
1da177e4 LT	172	buf += 4;
	173	pos += 4;
	174	cnt -= 4;
	175	}
	176
	177	if (cnt >= 2) {
	178	unsigned short val;
	179	__get_user(val, (unsigned short __user *) buf);
e04b0ea2	180	pci_user_write_config_word(dev, pos, le16_to_cpu(val));
1da177e4 LT	181	buf += 2;
	182	pos += 2;
	183	cnt -= 2;
	184	}
	185
	186	if (cnt) {
	187	unsigned char val;
	188	__get_user(val, buf);
e04b0ea2	189	pci_user_write_config_byte(dev, pos, val);
1da177e4 LT	190	buf++;
	191	pos++;
	192	cnt--;
	193	}
	194
	195	*ppos = pos;
	196	return nbytes;
	197	}
	198
	199	struct pci_filp_private {
	200	enum pci_mmap_state mmap_state;
	201	int write_combine;
	202	};
	203
	204	static int proc_bus_pci_ioctl(struct inode inode, struct file file, unsigned int cmd, unsigned long arg)
	205	{
	206	const struct proc_dir_entry *dp = PDE(inode);
	207	struct pci_dev *dev = dp->data;
	208	#ifdef HAVE_PCI_MMAP
	209	struct pci_filp_private *fpriv = file->private_data;
	210	#endif /* HAVE_PCI_MMAP */
	211	int ret = 0;
	212
	213	switch (cmd) {
	214	case PCIIOC_CONTROLLER:
	215	ret = pci_domain_nr(dev->bus);
	216	break;
	217
	218	#ifdef HAVE_PCI_MMAP
	219	case PCIIOC_MMAP_IS_IO:
	220	fpriv->mmap_state = pci_mmap_io;
	221	break;
	222
	223	case PCIIOC_MMAP_IS_MEM:
	224	fpriv->mmap_state = pci_mmap_mem;
	225	break;
	226
	227	case PCIIOC_WRITE_COMBINE:
	228	if (arg)
	229	fpriv->write_combine = 1;
	230	else
	231	fpriv->write_combine = 0;
	232	break;
	233
	234	#endif /* HAVE_PCI_MMAP */
	235
	236	default:
	237	ret = -EINVAL;
	238	break;
	239	};
	240
	241	return ret;
	242	}
	243
	244	#ifdef HAVE_PCI_MMAP
	245	static int proc_bus_pci_mmap(struct file file, struct vm_area_struct vma)
	246	{
46cc65a7	247	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4 LT	248	const struct proc_dir_entry *dp = PDE(inode);
	249	struct pci_dev *dev = dp->data;
	250	struct pci_filp_private *fpriv = file->private_data;
	251	int ret;
	252
	253	if (!capable(CAP_SYS_RAWIO))
	254	return -EPERM;
	255
	256	ret = pci_mmap_page_range(dev, vma,
	257	fpriv->mmap_state,
	258	fpriv->write_combine);
	259	if (ret < 0)
	260	return ret;
	261
	262	return 0;
	263	}
	264
	265	static int proc_bus_pci_open(struct inode inode, struct file file)
	266	{
	267	struct pci_filp_private fpriv = kmalloc(sizeof(fpriv), GFP_KERNEL);
	268
	269	if (!fpriv)
	270	return -ENOMEM;
	271
	272	fpriv->mmap_state = pci_mmap_io;
	273	fpriv->write_combine = 0;
	274
	275	file->private_data = fpriv;
	276
	277	return 0;
	278	}
	279
	280	static int proc_bus_pci_release(struct inode inode, struct file file)
	281	{
	282	kfree(file->private_data);
	283	file->private_data = NULL;
	284
	285	return 0;
	286	}
	287	#endif /* HAVE_PCI_MMAP */
	288
d54b1fdb	289	static const struct file_operations proc_bus_pci_operations = {
1da177e4 LT	290	.llseek = proc_bus_pci_lseek,
	291	.read = proc_bus_pci_read,
	292	.write = proc_bus_pci_write,
	293	.ioctl = proc_bus_pci_ioctl,
	294	#ifdef HAVE_PCI_MMAP
	295	.open = proc_bus_pci_open,
	296	.release = proc_bus_pci_release,
	297	.mmap = proc_bus_pci_mmap,
	298	#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
	299	.get_unmapped_area = get_pci_unmapped_area,
	300	#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
	301	#endif /* HAVE_PCI_MMAP */
	302	};
	303
1da177e4 LT	304	/* iterator */
	305	static void pci_seq_start(struct seq_file m, loff_t *pos)
	306	{
	307	struct pci_dev *dev = NULL;
	308	loff_t n = *pos;
	309
	310	for_each_pci_dev(dev) {
	311	if (!n--)
	312	break;
	313	}
	314	return dev;
	315	}
	316
	317	static void pci_seq_next(struct seq_file m, void v, loff_t pos)
	318	{
	319	struct pci_dev *dev = v;
	320
	321	(*pos)++;
	322	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
	323	return dev;
	324	}
	325
	326	static void pci_seq_stop(struct seq_file m, void v)
	327	{
	328	if (v) {
	329	struct pci_dev *dev = v;
	330	pci_dev_put(dev);
	331	}
	332	}
	333
	334	static int show_device(struct seq_file m, void v)
	335	{
	336	const struct pci_dev *dev = v;
	337	const struct pci_driver *drv;
	338	int i;
	339
	340	if (dev == NULL)
	341	return 0;
	342
	343	drv = pci_dev_driver(dev);
	344	seq_printf(m, "%02x%02x\t%04x%04x\t%x",
	345	dev->bus->number,
	346	dev->devfn,
	347	dev->vendor,
	348	dev->device,
	349	dev->irq);
	350	/* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
2311b1f2	351	for (i=0; i<7; i++) {
e31dd6e4	352	resource_size_t start, end;
2311b1f2	353	pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
1396a8c3 GKH	354	seq_printf(m, "\t%16llx",
	355	(unsigned long long)(start \|
	356	(dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
2311b1f2 ME	357	}
2311b1f2 ME	358	for (i=0; i<7; i++) {
e31dd6e4	359	resource_size_t start, end;
2311b1f2	360	pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
1396a8c3	361	seq_printf(m, "\t%16llx",
1da177e4	362	dev->resource[i].start < dev->resource[i].end ?
1396a8c3	363	(unsigned long long)(end - start) + 1 : 0);
2311b1f2	364	}
1da177e4 LT	365	seq_putc(m, '\t');
	366	if (drv)
	367	seq_printf(m, "%s", drv->name);
	368	seq_putc(m, '\n');
	369	return 0;
	370	}
	371
	372	static struct seq_operations proc_bus_pci_devices_op = {
	373	.start = pci_seq_start,
	374	.next = pci_seq_next,
	375	.stop = pci_seq_stop,
	376	.show = show_device
	377	};
	378
	379	static struct proc_dir_entry *proc_bus_pci_dir;
	380
	381	int pci_proc_attach_device(struct pci_dev *dev)
	382	{
	383	struct pci_bus *bus = dev->bus;
	384	struct proc_dir_entry *e;
	385	char name[16];
	386
	387	if (!proc_initialized)
	388	return -EACCES;
	389
	390	if (!bus->procdir) {
	391	if (pci_proc_domain(bus)) {
	392	sprintf(name, "%04x:%02x", pci_domain_nr(bus),
	393	bus->number);
	394	} else {
	395	sprintf(name, "%02x", bus->number);
	396	}
	397	bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
	398	if (!bus->procdir)
	399	return -ENOMEM;
	400	}
	401
	402	sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
	403	e = create_proc_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR, bus->procdir);
	404	if (!e)
	405	return -ENOMEM;
	406	e->proc_fops = &proc_bus_pci_operations;
	407	e->data = dev;
	408	e->size = dev->cfg_size;
	409	dev->procent = e;
	410
	411	return 0;
	412	}
	413
	414	int pci_proc_detach_device(struct pci_dev *dev)
	415	{
	416	struct proc_dir_entry *e;
	417
	418	if ((e = dev->procent)) {
	419	if (atomic_read(&e->count))
	420	return -EBUSY;
	421	remove_proc_entry(e->name, dev->bus->procdir);
	422	dev->procent = NULL;
	423	}
	424	return 0;
	425	}
	426
54c762fe	427	#if 0
1da177e4 LT	428	int pci_proc_attach_bus(struct pci_bus* bus)
	429	{
	430	struct proc_dir_entry *de = bus->procdir;
	431
	432	if (!proc_initialized)
	433	return -EACCES;
	434
	435	if (!de) {
	436	char name[16];
	437	sprintf(name, "%02x", bus->number);
	438	de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
	439	if (!de)
	440	return -ENOMEM;
	441	}
	442	return 0;
	443	}
54c762fe	444	#endif /* 0 */
1da177e4 LT	445
	446	int pci_proc_detach_bus(struct pci_bus* bus)
	447	{
	448	struct proc_dir_entry *de = bus->procdir;
	449	if (de)
	450	remove_proc_entry(de->name, proc_bus_pci_dir);
	451	return 0;
	452	}
	453
1da177e4 LT	454	static int proc_bus_pci_dev_open(struct inode inode, struct file file)
	455	{
	456	return seq_open(file, &proc_bus_pci_devices_op);
	457	}
d54b1fdb	458	static const struct file_operations proc_bus_pci_dev_operations = {
1da177e4 LT	459	.open = proc_bus_pci_dev_open,
	460	.read = seq_read,
	461	.llseek = seq_lseek,
	462	.release = seq_release,
	463	};
	464
	465	static int __init pci_proc_init(void)
	466	{
	467	struct proc_dir_entry *entry;
	468	struct pci_dev *dev = NULL;
	469	proc_bus_pci_dir = proc_mkdir("pci", proc_bus);
	470	entry = create_proc_entry("devices", 0, proc_bus_pci_dir);
	471	if (entry)
	472	entry->proc_fops = &proc_bus_pci_dev_operations;
	473	proc_initialized = 1;
	474	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
	475	pci_proc_attach_device(dev);
	476	}
1da177e4 LT	477	return 0;
	478	}
	479
	480	__initcall(pci_proc_init);
	481
	482	#ifdef CONFIG_HOTPLUG
	483	EXPORT_SYMBOL(pci_proc_attach_device);
1da177e4 LT	484	EXPORT_SYMBOL(pci_proc_detach_bus);
	485	#endif
	486