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

/*
 *	Procfs interface for the PCI bus.
 *
 *	Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <linux/capability.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 = dp->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), (__le16 __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), (__le32 __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), (__le16 __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)
{
	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 = dp->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) {
		__le16 val;
		__get_user(val, (__le16 __user *) buf);
		pci_user_write_config_word(dev, pos, le16_to_cpu(val));
		buf += 2;
		pos += 2;
		cnt -= 2;
	}

	while (cnt >= 4) {
		__le32 val;
		__get_user(val, (__le32 __user *) buf);
		pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
		buf += 4;
		pos += 4;
		cnt -= 4;
	}

	if (cnt >= 2) {
		__le16 val;
		__get_user(val, (__le16 __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;
	i_size_write(ino, dp->size);
	return nbytes;
}

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

static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	const struct proc_dir_entry *dp = PDE(file->f_dentry->d_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;

	lock_kernel();

	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;
	};

	unlock_kernel();
	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 = {
	.owner		= THIS_MODULE,
	.llseek		= proc_bus_pci_lseek,
	.read		= proc_bus_pci_read,
	.write		= proc_bus_pci_write,
	.unlocked_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 const 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 = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir,
			     &proc_bus_pci_operations, dev);
	if (!e)
		return -ENOMEM;
	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) > 1)
			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 = {
	.owner		= THIS_MODULE,
	.open		= proc_bus_pci_dev_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int __init pci_proc_init(void)
{
	struct pci_dev *dev = NULL;
	proc_bus_pci_dir = proc_mkdir("bus/pci", NULL);
	proc_create("devices", 0, proc_bus_pci_dir,
		    &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;
}

device_initcall(pci_proc_init);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Procfs interface for the PCI bus.
	3	*
	4	* Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
	5	*/
	6
	7	#include <linux/init.h>
	8	#include <linux/pci.h>
	9	#include <linux/module.h>
	10	#include <linux/proc_fs.h>
	11	#include <linux/seq_file.h>
add77184	12	#include <linux/smp_lock.h>
aa0ac365	13	#include <linux/capability.h>
1da177e4 LT	14	#include <asm/uaccess.h>
1da177e4 LT	15	#include <asm/byteorder.h>
bc56b9e0	16	#include "pci.h"
1da177e4 LT	17
	18	static int proc_initialized; /* = 0 */
	19
	20	static loff_t
	21	proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
	22	{
	23	loff_t new = -1;
46cc65a7	24	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4	25
1b1dcc1b	26	mutex_lock(&inode->i_mutex);
1da177e4 LT	27	switch (whence) {
	28	case 0:
	29	new = off;
	30	break;
	31	case 1:
	32	new = file->f_pos + off;
	33	break;
	34	case 2:
	35	new = inode->i_size + off;
	36	break;
	37	}
	38	if (new < 0 \|\| new > inode->i_size)
	39	new = -EINVAL;
	40	else
	41	file->f_pos = new;
1b1dcc1b	42	mutex_unlock(&inode->i_mutex);
1da177e4 LT	43	return new;
	44	}
	45
	46	static ssize_t
	47	proc_bus_pci_read(struct file file, char __user buf, size_t nbytes, loff_t *ppos)
	48	{
46cc65a7	49	const struct inode *ino = file->f_path.dentry->d_inode;
1da177e4 LT	50	const struct proc_dir_entry *dp = PDE(ino);
	51	struct pci_dev *dev = dp->data;
	52	unsigned int pos = *ppos;
	53	unsigned int cnt, size;
	54
	55	/*
	56	* Normal users can read only the standardized portion of the
	57	* configuration space as several chips lock up when trying to read
	58	* undefined locations (think of Intel PIIX4 as a typical example).
	59	*/
	60
	61	if (capable(CAP_SYS_ADMIN))
cd68602f	62	size = dp->size;
1da177e4 LT	63	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
	64	size = 128;
	65	else
	66	size = 64;
	67
	68	if (pos >= size)
	69	return 0;
	70	if (nbytes >= size)
	71	nbytes = size;
	72	if (pos + nbytes > size)
	73	nbytes = size - pos;
	74	cnt = nbytes;
	75
	76	if (!access_ok(VERIFY_WRITE, buf, cnt))
	77	return -EINVAL;
	78
	79	if ((pos & 1) && cnt) {
	80	unsigned char val;
e04b0ea2	81	pci_user_read_config_byte(dev, pos, &val);
1da177e4 LT	82	__put_user(val, buf);
	83	buf++;
	84	pos++;
	85	cnt--;
	86	}
	87
	88	if ((pos & 3) && cnt > 2) {
	89	unsigned short val;
e04b0ea2	90	pci_user_read_config_word(dev, pos, &val);
f17a077e	91	__put_user(cpu_to_le16(val), (__le16 __user *) buf);
1da177e4 LT	92	buf += 2;
	93	pos += 2;
	94	cnt -= 2;
	95	}
	96
	97	while (cnt >= 4) {
	98	unsigned int val;
e04b0ea2	99	pci_user_read_config_dword(dev, pos, &val);
f17a077e	100	__put_user(cpu_to_le32(val), (__le32 __user *) buf);
1da177e4 LT	101	buf += 4;
	102	pos += 4;
	103	cnt -= 4;
	104	}
	105
	106	if (cnt >= 2) {
	107	unsigned short val;
e04b0ea2	108	pci_user_read_config_word(dev, pos, &val);
f17a077e	109	__put_user(cpu_to_le16(val), (__le16 __user *) buf);
1da177e4 LT	110	buf += 2;
	111	pos += 2;
	112	cnt -= 2;
	113	}
	114
	115	if (cnt) {
	116	unsigned char val;
e04b0ea2	117	pci_user_read_config_byte(dev, pos, &val);
1da177e4 LT	118	__put_user(val, buf);
	119	buf++;
	120	pos++;
	121	cnt--;
	122	}
	123
	124	*ppos = pos;
	125	return nbytes;
	126	}
	127
	128	static ssize_t
	129	proc_bus_pci_write(struct file file, const char __user buf, size_t nbytes, loff_t *ppos)
	130	{
ecb39080	131	struct inode *ino = file->f_path.dentry->d_inode;
1da177e4 LT	132	const struct proc_dir_entry *dp = PDE(ino);
	133	struct pci_dev *dev = dp->data;
	134	int pos = *ppos;
cd68602f	135	int size = dp->size;
1da177e4 LT	136	int cnt;
	137
	138	if (pos >= size)
	139	return 0;
	140	if (nbytes >= size)
	141	nbytes = size;
	142	if (pos + nbytes > size)
	143	nbytes = size - pos;
	144	cnt = nbytes;
	145
	146	if (!access_ok(VERIFY_READ, buf, cnt))
	147	return -EINVAL;
	148
	149	if ((pos & 1) && cnt) {
	150	unsigned char val;
	151	__get_user(val, buf);
e04b0ea2	152	pci_user_write_config_byte(dev, pos, val);
1da177e4 LT	153	buf++;
	154	pos++;
	155	cnt--;
	156	}
	157
	158	if ((pos & 3) && cnt > 2) {
f17a077e HH	159	__le16 val;
f17a077e HH	160	__get_user(val, (__le16 __user *) buf);
e04b0ea2	161	pci_user_write_config_word(dev, pos, le16_to_cpu(val));
1da177e4 LT	162	buf += 2;
	163	pos += 2;
	164	cnt -= 2;
	165	}
	166
	167	while (cnt >= 4) {
f17a077e HH	168	__le32 val;
f17a077e HH	169	__get_user(val, (__le32 __user *) buf);
e04b0ea2	170	pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
1da177e4 LT	171	buf += 4;
	172	pos += 4;
	173	cnt -= 4;
	174	}
	175
	176	if (cnt >= 2) {
f17a077e HH	177	__le16 val;
f17a077e HH	178	__get_user(val, (__le16 __user *) buf);
e04b0ea2	179	pci_user_write_config_word(dev, pos, le16_to_cpu(val));
1da177e4 LT	180	buf += 2;
	181	pos += 2;
	182	cnt -= 2;
	183	}
	184
	185	if (cnt) {
	186	unsigned char val;
	187	__get_user(val, buf);
e04b0ea2	188	pci_user_write_config_byte(dev, pos, val);
1da177e4 LT	189	buf++;
	190	pos++;
	191	cnt--;
	192	}
	193
	194	*ppos = pos;
ecb39080	195	i_size_write(ino, dp->size);
1da177e4 LT	196	return nbytes;
	197	}
	198
	199	struct pci_filp_private {
	200	enum pci_mmap_state mmap_state;
	201	int write_combine;
	202	};
	203
add77184 MS	204	static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
add77184 MS	205	unsigned long arg)
1da177e4	206	{
add77184	207	const struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
1da177e4 LT	208	struct pci_dev *dev = dp->data;
	209	#ifdef HAVE_PCI_MMAP
	210	struct pci_filp_private *fpriv = file->private_data;
	211	#endif /* HAVE_PCI_MMAP */
	212	int ret = 0;
	213
add77184 MS	214	lock_kernel();
add77184 MS	215
1da177e4 LT	216	switch (cmd) {
	217	case PCIIOC_CONTROLLER:
	218	ret = pci_domain_nr(dev->bus);
	219	break;
	220
	221	#ifdef HAVE_PCI_MMAP
	222	case PCIIOC_MMAP_IS_IO:
	223	fpriv->mmap_state = pci_mmap_io;
	224	break;
	225
	226	case PCIIOC_MMAP_IS_MEM:
	227	fpriv->mmap_state = pci_mmap_mem;
	228	break;
	229
	230	case PCIIOC_WRITE_COMBINE:
	231	if (arg)
	232	fpriv->write_combine = 1;
	233	else
	234	fpriv->write_combine = 0;
	235	break;
	236
	237	#endif /* HAVE_PCI_MMAP */
	238
	239	default:
	240	ret = -EINVAL;
	241	break;
	242	};
	243
add77184	244	unlock_kernel();
1da177e4 LT	245	return ret;
	246	}
	247
	248	#ifdef HAVE_PCI_MMAP
	249	static int proc_bus_pci_mmap(struct file file, struct vm_area_struct vma)
	250	{
46cc65a7	251	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4 LT	252	const struct proc_dir_entry *dp = PDE(inode);
	253	struct pci_dev *dev = dp->data;
	254	struct pci_filp_private *fpriv = file->private_data;
	255	int ret;
	256
	257	if (!capable(CAP_SYS_RAWIO))
	258	return -EPERM;
	259
	260	ret = pci_mmap_page_range(dev, vma,
	261	fpriv->mmap_state,
	262	fpriv->write_combine);
	263	if (ret < 0)
	264	return ret;
	265
	266	return 0;
	267	}
	268
	269	static int proc_bus_pci_open(struct inode inode, struct file file)
	270	{
	271	struct pci_filp_private fpriv = kmalloc(sizeof(fpriv), GFP_KERNEL);
	272
	273	if (!fpriv)
	274	return -ENOMEM;
	275
	276	fpriv->mmap_state = pci_mmap_io;
	277	fpriv->write_combine = 0;
	278
	279	file->private_data = fpriv;
	280
	281	return 0;
	282	}
	283
	284	static int proc_bus_pci_release(struct inode inode, struct file file)
	285	{
	286	kfree(file->private_data);
	287	file->private_data = NULL;
	288
	289	return 0;
	290	}
	291	#endif /* HAVE_PCI_MMAP */
	292
d54b1fdb	293	static const struct file_operations proc_bus_pci_operations = {
c7705f34	294	.owner = THIS_MODULE,
1da177e4 LT	295	.llseek = proc_bus_pci_lseek,
	296	.read = proc_bus_pci_read,
	297	.write = proc_bus_pci_write,
add77184	298	.unlocked_ioctl = proc_bus_pci_ioctl,
1da177e4 LT	299	#ifdef HAVE_PCI_MMAP
	300	.open = proc_bus_pci_open,
	301	.release = proc_bus_pci_release,
	302	.mmap = proc_bus_pci_mmap,
	303	#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
	304	.get_unmapped_area = get_pci_unmapped_area,
	305	#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
	306	#endif /* HAVE_PCI_MMAP */
	307	};
	308
1da177e4 LT	309	/* iterator */
	310	static void pci_seq_start(struct seq_file m, loff_t *pos)
	311	{
	312	struct pci_dev *dev = NULL;
	313	loff_t n = *pos;
	314
	315	for_each_pci_dev(dev) {
	316	if (!n--)
	317	break;
	318	}
	319	return dev;
	320	}
	321
	322	static void pci_seq_next(struct seq_file m, void v, loff_t pos)
	323	{
	324	struct pci_dev *dev = v;
	325
	326	(*pos)++;
	327	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
	328	return dev;
	329	}
	330
	331	static void pci_seq_stop(struct seq_file m, void v)
	332	{
	333	if (v) {
	334	struct pci_dev *dev = v;
	335	pci_dev_put(dev);
	336	}
	337	}
	338
	339	static int show_device(struct seq_file m, void v)
	340	{
	341	const struct pci_dev *dev = v;
	342	const struct pci_driver *drv;
	343	int i;
	344
	345	if (dev == NULL)
	346	return 0;
	347
	348	drv = pci_dev_driver(dev);
	349	seq_printf(m, "%02x%02x\t%04x%04x\t%x",
	350	dev->bus->number,
	351	dev->devfn,
	352	dev->vendor,
	353	dev->device,
	354	dev->irq);
	355	/* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
2311b1f2	356	for (i=0; i<7; i++) {
e31dd6e4	357	resource_size_t start, end;
2311b1f2	358	pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
1396a8c3 GKH	359	seq_printf(m, "\t%16llx",
	360	(unsigned long long)(start \|
	361	(dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
2311b1f2 ME	362	}
2311b1f2 ME	363	for (i=0; i<7; i++) {
e31dd6e4	364	resource_size_t start, end;
2311b1f2	365	pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
1396a8c3	366	seq_printf(m, "\t%16llx",
1da177e4	367	dev->resource[i].start < dev->resource[i].end ?
1396a8c3	368	(unsigned long long)(end - start) + 1 : 0);
2311b1f2	369	}
1da177e4 LT	370	seq_putc(m, '\t');
	371	if (drv)
	372	seq_printf(m, "%s", drv->name);
	373	seq_putc(m, '\n');
	374	return 0;
	375	}
	376
02d90fc3	377	static const struct seq_operations proc_bus_pci_devices_op = {
1da177e4 LT	378	.start = pci_seq_start,
	379	.next = pci_seq_next,
	380	.stop = pci_seq_stop,
	381	.show = show_device
	382	};
	383
	384	static struct proc_dir_entry *proc_bus_pci_dir;
	385
	386	int pci_proc_attach_device(struct pci_dev *dev)
	387	{
	388	struct pci_bus *bus = dev->bus;
	389	struct proc_dir_entry *e;
	390	char name[16];
	391
	392	if (!proc_initialized)
	393	return -EACCES;
	394
	395	if (!bus->procdir) {
	396	if (pci_proc_domain(bus)) {
	397	sprintf(name, "%04x:%02x", pci_domain_nr(bus),
	398	bus->number);
	399	} else {
	400	sprintf(name, "%02x", bus->number);
	401	}
	402	bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
	403	if (!bus->procdir)
	404	return -ENOMEM;
	405	}
	406
	407	sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
c7705f34 DL	408	e = proc_create_data(name, S_IFREG \| S_IRUGO \| S_IWUSR, bus->procdir,
c7705f34 DL	409	&proc_bus_pci_operations, dev);
1da177e4 LT	410	if (!e)
1da177e4 LT	411	return -ENOMEM;
1da177e4 LT	412	e->size = dev->cfg_size;
	413	dev->procent = e;
	414
	415	return 0;
	416	}
	417
	418	int pci_proc_detach_device(struct pci_dev *dev)
	419	{
	420	struct proc_dir_entry *e;
	421
	422	if ((e = dev->procent)) {
79df4c60	423	if (atomic_read(&e->count) > 1)
1da177e4 LT	424	return -EBUSY;
	425	remove_proc_entry(e->name, dev->bus->procdir);
	426	dev->procent = NULL;
	427	}
	428	return 0;
	429	}
	430
54c762fe	431	#if 0
1da177e4 LT	432	int pci_proc_attach_bus(struct pci_bus* bus)
	433	{
	434	struct proc_dir_entry *de = bus->procdir;
	435
	436	if (!proc_initialized)
	437	return -EACCES;
	438
	439	if (!de) {
	440	char name[16];
	441	sprintf(name, "%02x", bus->number);
	442	de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
	443	if (!de)
	444	return -ENOMEM;
	445	}
	446	return 0;
	447	}
54c762fe	448	#endif /* 0 */
1da177e4 LT	449
	450	int pci_proc_detach_bus(struct pci_bus* bus)
	451	{
	452	struct proc_dir_entry *de = bus->procdir;
	453	if (de)
	454	remove_proc_entry(de->name, proc_bus_pci_dir);
	455	return 0;
	456	}
	457
1da177e4 LT	458	static int proc_bus_pci_dev_open(struct inode inode, struct file file)
	459	{
	460	return seq_open(file, &proc_bus_pci_devices_op);
	461	}
d54b1fdb	462	static const struct file_operations proc_bus_pci_dev_operations = {
c7705f34	463	.owner = THIS_MODULE,
1da177e4 LT	464	.open = proc_bus_pci_dev_open,
	465	.read = seq_read,
	466	.llseek = seq_lseek,
	467	.release = seq_release,
	468	};
	469
	470	static int __init pci_proc_init(void)
	471	{
1da177e4	472	struct pci_dev *dev = NULL;
9c37066d	473	proc_bus_pci_dir = proc_mkdir("bus/pci", NULL);
c7705f34 DL	474	proc_create("devices", 0, proc_bus_pci_dir,
c7705f34 DL	475	&proc_bus_pci_dev_operations);
1da177e4 LT	476	proc_initialized = 1;
	477	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
	478	pci_proc_attach_device(dev);
	479	}
1da177e4 LT	480	return 0;
	481	}
	482
eaf61142	483	device_initcall(pci_proc_init);
1da177e4	484