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#ifndef _IPXE_LINUX_PCI_H
#define _IPXE_LINUX_PCI_H
/** @file
*
* iPXE PCI API for Linux
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#ifdef PCIAPI_LINUX
#define PCIAPI_PREFIX_linux
#else
#define PCIAPI_PREFIX_linux __linux_
#endif
struct pci_device;
extern int linux_pci_read ( struct pci_device *pci, unsigned long where,
unsigned long *value, size_t len );
extern int linux_pci_write ( struct pci_device *pci, unsigned long where,
unsigned long value, size_t len );
/**
* Determine number of PCI buses within system
*
* @ret num_bus Number of buses
*/
static inline __always_inline int
PCIAPI_INLINE ( linux, pci_num_bus ) ( void ) {
/* Assume all buses may exist */
return 0x100;
}
/**
* Read byte from PCI configuration space
*
* @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 ( linux, pci_read_config_byte ) ( struct pci_device *pci,
unsigned int where,
uint8_t *value ) {
int rc;
unsigned long tmp;
rc = linux_pci_read ( pci, where, &tmp, sizeof ( *value ) );
*value = tmp;
return rc;
}
/**
* Read word from PCI configuration space
*
* @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 ( linux, pci_read_config_word ) ( struct pci_device *pci,
unsigned int where,
uint16_t *value ) {
int rc;
unsigned long tmp;
rc = linux_pci_read ( pci, where, &tmp, sizeof ( *value ) );
*value = tmp;
return rc;
}
/**
* Read dword from PCI configuration space
*
* @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 ( linux, pci_read_config_dword ) ( struct pci_device *pci,
unsigned int where,
uint32_t *value ) {
int rc;
unsigned long tmp;
rc = linux_pci_read ( pci, where, &tmp, sizeof ( *value ) );
*value = tmp;
return rc;
}
/**
* Write byte to PCI configuration space
*
* @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 ( linux, pci_write_config_byte ) ( struct pci_device *pci,
unsigned int where,
uint8_t value ) {
return linux_pci_write ( pci, where, value, sizeof ( value ) );
}
/**
* Write word to PCI configuration space
*
* @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 ( linux, pci_write_config_word ) ( struct pci_device *pci,
unsigned int where,
uint16_t value ) {
return linux_pci_write ( pci, where, value, sizeof ( value ) );
}
/**
* Write dword to PCI configuration space
*
* @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 ( linux, pci_write_config_dword ) ( struct pci_device *pci,
unsigned int where,
uint32_t value ) {
return linux_pci_write ( pci, where, value, sizeof ( value ) );
}
/**
* 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 ( linux, pci_ioremap ) ( struct pci_device *pci __unused,
unsigned long bus_addr, size_t len ) {
return ioremap ( bus_addr, len );
}
#endif /* _IPXE_LINUX_PCI_H */
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