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/errfile.h | 1 + src/include/ipxe/linux.h | 8 +++ src/include/ipxe/linux/linux_pci.h | 130 +++++++++++++++++++++++++++++++++++++ src/include/ipxe/pci_io.h | 1 + src/include/linux_api.h | 2 + 5 files changed, 142 insertions(+) create mode 100644 src/include/ipxe/linux/linux_pci.h (limited to 'src/include') diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 67edcc931..2b9d16ca0 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -275,6 +275,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_efi_init ( ERRFILE_OTHER | 0x00390000 ) #define ERRFILE_efi_timer ( ERRFILE_OTHER | 0x003a0000 ) #define ERRFILE_efi_umalloc ( ERRFILE_OTHER | 0x003b0000 ) +#define ERRFILE_linux_pci ( ERRFILE_OTHER | 0x003c0000 ) /** @} */ diff --git a/src/include/ipxe/linux.h b/src/include/ipxe/linux.h index dac508ea6..a01ace3de 100644 --- a/src/include/ipxe/linux.h +++ b/src/include/ipxe/linux.h @@ -30,6 +30,14 @@ FILE_LICENCE(GPL2_OR_LATER); #include #include +/** + * Convert a Linux error number to an iPXE status code + * + * @v errno Linux error number + * @ret rc iPXE status code (before negation) + */ +#define ELINUX( errno ) EPLATFORM ( EINFO_EPLATFORM, errno ) + /** A linux device */ struct linux_device { /** Generic device */ 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 */ diff --git a/src/include/ipxe/pci_io.h b/src/include/ipxe/pci_io.h index 7368cf48b..781b77fe1 100644 --- a/src/include/ipxe/pci_io.h +++ b/src/include/ipxe/pci_io.h @@ -44,6 +44,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); /* Include all architecture-independent I/O API headers */ #include +#include /* Include all architecture-dependent I/O API headers */ #include diff --git a/src/include/linux_api.h b/src/include/linux_api.h index 94dc991f0..28a3cda3b 100644 --- a/src/include/linux_api.h +++ b/src/include/linux_api.h @@ -47,11 +47,13 @@ typedef __kernel_loff_t loff_t; typedef unsigned long nfds_t; typedef uint32_t useconds_t; #define MAP_FAILED ( ( void * ) -1 ) +#define SEEK_SET 0 extern long linux_syscall ( int number, ... ); extern int linux_open ( const char *pathname, int flags ); extern int linux_close ( int fd ); +extern off_t linux_lseek ( int fd, off_t offset, int whence ); extern __kernel_ssize_t linux_read ( int fd, void *buf, __kernel_size_t count ); extern __kernel_ssize_t linux_write ( int fd, const void *buf, __kernel_size_t count ); -- cgit v1.2.3-55-g7522