access.c File Reference

#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/wait.h>
#include "pci.h"

Go to the source code of this file.

Data Structures
struct	pci_vpd_pci22

Macros
#define	PCI_byte_BAD   0
#define	PCI_word_BAD   (pos & 1)
#define	PCI_dword_BAD   (pos & 3)
#define	PCI_OP_READ(size, type, len)
#define	PCI_OP_WRITE(size, type, len)
#define	PCI_USER_READ_CONFIG(size, type)
#define	PCI_USER_WRITE_CONFIG(size, type)
#define	PCI_VPD_PCI22_SIZE   (PCI_VPD_ADDR_MASK + 1)

Functions
	DEFINE_RAW_SPINLOCK (pci_lock)
	EXPORT_SYMBOL (pci_bus_read_config_byte)
	EXPORT_SYMBOL (pci_bus_read_config_word)
	EXPORT_SYMBOL (pci_bus_read_config_dword)
	EXPORT_SYMBOL (pci_bus_write_config_byte)
	EXPORT_SYMBOL (pci_bus_write_config_word)
	EXPORT_SYMBOL (pci_bus_write_config_dword)
struct pci_ops *	pci_bus_set_ops (struct pci_bus *bus, struct pci_ops *ops)
	EXPORT_SYMBOL (pci_bus_set_ops)
ssize_t	pci_read_vpd (struct pci_dev *dev, loff_t pos, size_t count, void *buf)
	EXPORT_SYMBOL (pci_read_vpd)
ssize_t	pci_write_vpd (struct pci_dev *dev, loff_t pos, size_t count, const void *buf)
	EXPORT_SYMBOL (pci_write_vpd)
int	pci_vpd_pci22_init (struct pci_dev *dev)
int	pci_vpd_truncate (struct pci_dev *dev, size_t size)
	EXPORT_SYMBOL (pci_vpd_truncate)
void	pci_cfg_access_lock (struct pci_dev *dev)
	EXPORT_SYMBOL_GPL (pci_cfg_access_lock)
bool	pci_cfg_access_trylock (struct pci_dev *dev)
	EXPORT_SYMBOL_GPL (pci_cfg_access_trylock)
void	pci_cfg_access_unlock (struct pci_dev *dev)
	EXPORT_SYMBOL_GPL (pci_cfg_access_unlock)
int	pcie_capability_read_word (struct pci_dev *dev, int pos, u16 *val)
	EXPORT_SYMBOL (pcie_capability_read_word)
int	pcie_capability_read_dword (struct pci_dev *dev, int pos, u32 *val)
	EXPORT_SYMBOL (pcie_capability_read_dword)
int	pcie_capability_write_word (struct pci_dev *dev, int pos, u16 val)
	EXPORT_SYMBOL (pcie_capability_write_word)
int	pcie_capability_write_dword (struct pci_dev *dev, int pos, u32 val)
	EXPORT_SYMBOL (pcie_capability_write_dword)
int	pcie_capability_clear_and_set_word (struct pci_dev *dev, int pos, u16 clear, u16 set)
	EXPORT_SYMBOL (pcie_capability_clear_and_set_word)
int	pcie_capability_clear_and_set_dword (struct pci_dev *dev, int pos, u32 clear, u32 set)
	EXPORT_SYMBOL (pcie_capability_clear_and_set_dword)

Macro Definition Documentation

#define PCI_byte_BAD   0

Definition at line 24 of file access.c.

#define PCI_dword_BAD   (pos & 3)

Definition at line 26 of file access.c.

#define PCI_OP_READ	(		size,
			type,
			len
	)

Value:

int pci_bus_read_config_##size \
    (struct pci_bus *bus, unsigned int devfn, int pos, type *value) \
{                                   \
    int res;                            \
    unsigned long flags;                        \
	u32 data = 0;                          \
    if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;   \
    raw_spin_lock_irqsave(&pci_lock, flags);            \
    res = bus->ops->read(bus, devfn, pos, len, &data);      \
    *value = (type)data;                        \
    raw_spin_unlock_irqrestore(&pci_lock, flags);       \
    return res;                         \
}

Definition at line 28 of file access.c.

#define PCI_OP_WRITE	(		size,
			type,
			len
	)

Value:

int pci_bus_write_config_##size \
    (struct pci_bus *bus, unsigned int devfn, int pos, type value)  \
{                                   \
    int res;                            \
    unsigned long flags;                        \
    if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;   \
    raw_spin_lock_irqsave(&pci_lock, flags);            \
    res = bus->ops->write(bus, devfn, pos, len, value);     \
    raw_spin_unlock_irqrestore(&pci_lock, flags);       \
    return res;                         \
}

Definition at line 43 of file access.c.

#define PCI_USER_READ_CONFIG	(		size,
			type
	)

Value:

int pci_user_read_config_##size                     \
    (struct pci_dev *dev, int pos, type *val)           \
{                                   \
    int ret = 0;                            \
	u32 data = -1;                         \
    if (PCI_##size##_BAD)                       \
        return -EINVAL;                     \
    raw_spin_lock_irq(&pci_lock);               \
    if (unlikely(dev->block_cfg_access))                \
        pci_wait_cfg(dev);                  \
    ret = dev->bus->ops->read(dev->bus, dev->devfn,         \
                    pos, sizeof(type), &data);  \
    raw_spin_unlock_irq(&pci_lock);             \
    *val = (type)data;                      \
    if (ret > 0)                            \
        ret = -EINVAL;                      \
    return ret;                         \
}                                   \
EXPORT_SYMBOL_GPL(pci_user_read_config_##size);

Definition at line 147 of file access.c.

#define PCI_USER_WRITE_CONFIG	(		size,
			type
	)

Value:

int pci_user_write_config_##size                    \
    (struct pci_dev *dev, int pos, type val)            \
{                                   \
    int ret = -EIO;                         \
    if (PCI_##size##_BAD)                       \
        return -EINVAL;                     \
    raw_spin_lock_irq(&pci_lock);               \
    if (unlikely(dev->block_cfg_access))                \
        pci_wait_cfg(dev);                  \
    ret = dev->bus->ops->write(dev->bus, dev->devfn,        \
                    pos, sizeof(type), val);    \
    raw_spin_unlock_irq(&pci_lock);             \
    if (ret > 0)                            \
        ret = -EINVAL;                      \
    return ret;                         \
}                                   \
EXPORT_SYMBOL_GPL(pci_user_write_config_##size);

Definition at line 169 of file access.c.

#define PCI_VPD_PCI22_SIZE   (PCI_VPD_ADDR_MASK + 1)

Definition at line 197 of file access.c.

#define PCI_word_BAD   (pos & 1)

Definition at line 25 of file access.c.

Function Documentation

DEFINE_RAW_SPINLOCK

(

pci_lock

)

EXPORT_SYMBOL

(

pci_bus_read_config_byte

)

EXPORT_SYMBOL

(

pci_bus_read_config_word

)

EXPORT_SYMBOL

(

pci_bus_read_config_dword

)

EXPORT_SYMBOL

(

pci_bus_write_config_byte

)

EXPORT_SYMBOL

(

pci_bus_write_config_word

)

EXPORT_SYMBOL

(

pci_bus_write_config_dword

)

EXPORT_SYMBOL

(

pci_bus_set_ops

)

EXPORT_SYMBOL

(

pci_read_vpd

)

EXPORT_SYMBOL

(

pci_write_vpd

)

EXPORT_SYMBOL

(

pci_vpd_truncate

)

EXPORT_SYMBOL

(

pcie_capability_read_word

)

EXPORT_SYMBOL

(

pcie_capability_read_dword

)

EXPORT_SYMBOL

(

pcie_capability_write_word

)

EXPORT_SYMBOL

(

pcie_capability_write_dword

)

EXPORT_SYMBOL

(

pcie_capability_clear_and_set_word

)

EXPORT_SYMBOL

(

pcie_capability_clear_and_set_dword

)

EXPORT_SYMBOL_GPL

(

pci_cfg_access_lock

)

EXPORT_SYMBOL_GPL

(

pci_cfg_access_trylock

)

EXPORT_SYMBOL_GPL

(

pci_cfg_access_unlock

)

struct pci_ops* pci_bus_set_ops ( struct pci_bus *  bus, struct pci_ops *  ops  )

read

pci_bus_set_ops - Set raw operations of pci bus : pci bus struct : new raw operations

Return previous raw operations

Definition at line 77 of file access.c.

void pci_cfg_access_lock

(

struct pci_dev *

dev

)

pci_cfg_access_lock - Lock PCI config reads/writes : pci device struct

When access is locked, any userspace reads or writes to config space and concurrent lock requests will sleep until access is allowed via pci_cfg_access_unlocked again.

Definition at line 415 of file access.c.

bool pci_cfg_access_trylock

(

struct pci_dev *

dev

)

pci_cfg_access_trylock - try to lock PCI config reads/writes : pci device struct

Same as pci_cfg_access_lock, but will return 0 if access is already locked, 1 otherwise. This function can be used from atomic contexts.

Definition at line 435 of file access.c.

void pci_cfg_access_unlock

(

struct pci_dev *

dev

)

pci_cfg_access_unlock - Unlock PCI config reads/writes : pci device struct

This function allows PCI config accesses to resume.

Definition at line 457 of file access.c.

ssize_t pci_read_vpd	(	struct pci_dev *	dev,
		loff_t	pos,
		size_t	count,
		void *	buf
	)

pci_read_vpd - Read one entry from Vital Product Data : pci device struct : offset in vpd space : number of bytes to read : pointer to where to store result

Definition at line 98 of file access.c.

int pci_vpd_pci22_init

(

struct pci_dev *

dev

)

Definition at line 362 of file access.c.

int pci_vpd_truncate	(	struct pci_dev *	dev,
		size_t	size
	)

pci_vpd_truncate - Set available Vital Product Data size : pci device struct : available memory in bytes

Adjust size of available VPD area.

Definition at line 390 of file access.c.

ssize_t pci_write_vpd	(	struct pci_dev *	dev,
		loff_t	pos,
		size_t	count,
		const void *	buf
	)

pci_write_vpd - Write entry to Vital Product Data : pci device struct : offset in vpd space : number of bytes to write : buffer containing write data

Definition at line 114 of file access.c.

int pcie_capability_clear_and_set_dword	(	struct pci_dev *	dev,
		int	pos,
		u32	clear,
		u32	set
	)

Definition at line 658 of file access.c.

int pcie_capability_clear_and_set_word	(	struct pci_dev *	dev,
		int	pos,
		u16	clear,
		u16	set
	)

Definition at line 641 of file access.c.

int pcie_capability_read_dword	(	struct pci_dev *	dev,
		int	pos,
		u32 *	val
	)

Definition at line 588 of file access.c.

int pcie_capability_read_word	(	struct pci_dev *	dev,
		int	pos,
		u16 *	val
	)

Definition at line 552 of file access.c.

int pcie_capability_write_dword	(	struct pci_dev *	dev,
		int	pos,
		u32	val
	)

Definition at line 629 of file access.c.

int pcie_capability_write_word	(	struct pci_dev *	dev,
		int	pos,
		u16	val
	)

Definition at line 617 of file access.c.