From d8392851d2d5cfe0a7f79c2dab29219f59affa60 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Sat, 13 Jul 2013 12:42:40 +0200 Subject: [linux] Add support for accessing PCI configuration space via /proc/bus/pci Signed-off-by: Michael Brown --- src/include/ipxe/linux/linux_pci.h | 130 +++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 src/include/ipxe/linux/linux_pci.h (limited to 'src/include/ipxe/linux/linux_pci.h') diff --git a/src/include/ipxe/linux/linux_pci.h b/src/include/ipxe/linux/linux_pci.h new file mode 100644 index 000000000..439166733 --- /dev/null +++ b/src/include/ipxe/linux/linux_pci.h @@ -0,0 +1,130 @@ +#ifndef _IPXE_LINUX_PCI_H +#define _IPXE_LINUX_PCI_H + +/** @file + * + * iPXE PCI API for Linux + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#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 ); + +/** + * 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 ) ); +} + +#endif /* _IPXE_LINUX_PCI_H */ -- cgit v1.2.3-55-g7522