#ifndef _PCIDIRECT_H
#define _PCIDIRECT_H
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/io.h>
#ifdef PCIAPI_DIRECT
#define PCIAPI_PREFIX_direct
#else
#define PCIAPI_PREFIX_direct __direct_
#endif
/** @file
*
* PCI configuration space access via Type 1 accesses
*
*/
#define PCIDIRECT_CONFIG_ADDRESS 0xcf8
#define PCIDIRECT_CONFIG_DATA 0xcfc
struct pci_device;
extern void pcidirect_prepare ( struct pci_device *pci, int where );
/**
* Find next PCI bus:dev.fn address range in system
*
* @v busdevfn Starting PCI bus:dev.fn address
* @v range PCI bus:dev.fn address range to fill in
*/
static inline __always_inline void
PCIAPI_INLINE ( direct, pci_discover ) ( uint32_t busdevfn __unused,
struct pci_range *range ) {
/* Scan first bus and rely on bridge detection to find higher buses */
range->start = PCI_BUSDEVFN ( 0, 0, 0, 0 );
range->count = PCI_BUSDEVFN ( 0, 1, 0, 0 );
}
/**
* Read byte from PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value read
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_read_config_byte ) ( struct pci_device *pci,
unsigned int where,
uint8_t *value ) {
pcidirect_prepare ( pci, where );
*value = inb ( PCIDIRECT_CONFIG_DATA + ( where & 3 ) );
return 0;
}
/**
* Read word from PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value read
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_read_config_word ) ( struct pci_device *pci,
unsigned int where,
uint16_t *value ) {
pcidirect_prepare ( pci, where );
*value = inw ( PCIDIRECT_CONFIG_DATA + ( where & 2 ) );
return 0;
}
/**
* Read dword from PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value read
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_read_config_dword ) ( struct pci_device *pci,
unsigned int where,
uint32_t *value ) {
pcidirect_prepare ( pci, where );
*value = inl ( PCIDIRECT_CONFIG_DATA );
return 0;
}
/**
* Write byte to PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value to be written
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_write_config_byte ) ( struct pci_device *pci,
unsigned int where,
uint8_t value ) {
pcidirect_prepare ( pci, where );
outb ( value, PCIDIRECT_CONFIG_DATA + ( where & 3 ) );
return 0;
}
/**
* Write word to PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value to be written
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_write_config_word ) ( struct pci_device *pci,
unsigned int where,
uint16_t value ) {
pcidirect_prepare ( pci, where );
outw ( value, PCIDIRECT_CONFIG_DATA + ( where & 2 ) );
return 0;
}
/**
* Write dword to PCI configuration space via Type 1 access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v value Value to be written
* @ret rc Return status code
*/
static inline __always_inline int
PCIAPI_INLINE ( direct, pci_write_config_dword ) ( struct pci_device *pci,
unsigned int where,
uint32_t value ) {
pcidirect_prepare ( pci, where );
outl ( value, PCIDIRECT_CONFIG_DATA );
return 0;
}
/**
* Map PCI bus address as an I/O address
*
* @v bus_addr PCI bus address
* @v len Length of region
* @ret io_addr I/O address, or NULL on error
*/
static inline __always_inline void *
PCIAPI_INLINE ( direct, pci_ioremap ) ( struct pci_device *pci __unused,
unsigned long bus_addr, size_t len ) {
return ioremap ( bus_addr, len );
}
extern struct pci_api pcidirect_api;
#endif /* _PCIDIRECT_H */
