efi_pci.h File Reference

gPXE PCI I/O API for EFI More...

Go to the source code of this file.

Defines

#define PCIAPI_PREFIX_efi   __efi_

#define EFIPCI_WIDTH_BYTE   0

#define EFIPCI_WIDTH_WORD   1

#define EFIPCI_WIDTH_DWORD   2

#define EFIPCI_LOCATION(_offset, _width)   ( (_offset) | ( (_width) << 16 ) )

#define EFIPCI_OFFSET(_location)   ( (_location) & 0xffff )

#define EFIPCI_WIDTH(_location)   ( (_location) >> 16 )

Functions

FILE_LICENCE (GPL2_OR_LATER)

int efipci_read (struct pci_device *pci, unsigned long location, void *value)

int efipci_write (struct pci_device *pci, unsigned long location, unsigned long value)

static __always_inline int PCIAPI_INLINE (efi, pci_max_bus)(void)

Determine maximum PCI bus number within system.

static __always_inline int PCIAPI_INLINE (efi, pci_read_config_byte)(struct pci_device *pci

Read byte from PCI configuration space via EFI.

Variables

static __always_inline int
unsigned int where

Detailed Description

gPXE PCI I/O API for EFI

Definition in file efi_pci.h.

Define Documentation

#define PCIAPI_PREFIX_efi __efi_

Definition at line 15 of file efi_pci.h.

#define EFIPCI_WIDTH_BYTE 0

Definition at line 19 of file efi_pci.h.

#define EFIPCI_WIDTH_WORD 1

Definition at line 20 of file efi_pci.h.

#define EFIPCI_WIDTH_DWORD 2

Definition at line 21 of file efi_pci.h.

#define EFIPCI_LOCATION	(	_offset,
		_width		)	( (_offset) \| ( (_width) << 16 ) )

Definition at line 23 of file efi_pci.h.

#define EFIPCI_OFFSET ( _location ) ( (_location) & 0xffff )

Definition at line 25 of file efi_pci.h.

Referenced by efipci_address(), efipci_read(), and efipci_write().

#define EFIPCI_WIDTH ( _location ) ( (_location) >> 16 )

Definition at line 26 of file efi_pci.h.

Referenced by efipci_read(), and efipci_write().

Function Documentation

FILE_LICENCE ( GPL2_OR_LATER )

int efipci_read	(	struct pci_device *	pci,
		unsigned long	location,
		void *	value
	)

Definition at line 43 of file efi_pci.c.

References pci_device::bus, DBG, pci_device::devfn, efi_strerror(), efipci_address(), EFIPCI_OFFSET, EFIPCI_WIDTH, EIO, _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL::Pci, PCI_FUNC, PCI_SLOT, and EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS::Read.

00044                                 {
00045         EFI_STATUS efirc;
00046 
00047         if ( ( efirc = efipci->Pci.Read ( efipci, EFIPCI_WIDTH ( location ),
00048                                           efipci_address ( pci, location ), 1,
00049                                           value ) ) != 0 ) {
00050                 DBG ( "EFIPCI config read from %02x:%02x.%x offset %02lx "
00051                       "failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ),
00052                       PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
00053                       efi_strerror ( efirc ) );
00054                 return -EIO;
00055         }
00056 
00057         return 0;
00058 }

int efipci_write	(	struct pci_device *	pci,
		unsigned long	location,
		unsigned long	value
	)

Definition at line 60 of file efi_pci.c.

References pci_device::bus, DBG, pci_device::devfn, efi_strerror(), efipci_address(), EFIPCI_OFFSET, EFIPCI_WIDTH, EIO, _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL::Pci, PCI_FUNC, PCI_SLOT, and EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS::Write.

00061                                          {
00062         EFI_STATUS efirc;
00063 
00064         if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ),
00065                                            efipci_address ( pci, location ), 1,
00066                                            &value ) ) != 0 ) {
00067                 DBG ( "EFIPCI config write to %02x:%02x.%x offset %02lx "
00068                       "failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ),
00069                       PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
00070                       efi_strerror ( efirc ) );
00071                 return -EIO;
00072         }
00073 
00074         return 0;
00075 }

static __always_inline int PCIAPI_INLINE	(	efi	,
		pci_max_bus
	)			`[inline, static]`

Determine maximum PCI bus number within system.

Return values:

max_bus

Maximum bus number

Definition at line 41 of file efi_pci.h.

00041                                             {
00042         /* No way to work this out via EFI */
00043         return 0xff;
00044 }

static __always_inline int PCIAPI_INLINE	(	efi	,
		pci_read_config_byte
	)			`[inline, static]`

Read byte from PCI configuration space via EFI.

Parameters:

	pci	PCI device
	where	Location within PCI configuration space
	value	Value read

Return values:

rc

Return status code

Variable Documentation

__always_inline int unsigned int where

Definition at line 56 of file efi_pci.h.


Defines
#define	PCIAPI_PREFIX_efi __efi_
#define	EFIPCI_WIDTH_BYTE 0
#define	EFIPCI_WIDTH_WORD 1
#define	EFIPCI_WIDTH_DWORD 2
#define	EFIPCI_LOCATION(_offset, _width) ( (_offset) \| ( (_width) << 16 ) )
#define	EFIPCI_OFFSET(_location) ( (_location) & 0xffff )
#define	EFIPCI_WIDTH(_location) ( (_location) >> 16 )
Functions
	FILE_LICENCE (GPL2_OR_LATER)
int	efipci_read (struct pci_device pci, unsigned long location, void value)
int	efipci_write (struct pci_device *pci, unsigned long location, unsigned long value)
static __always_inline int	PCIAPI_INLINE (efi, pci_max_bus)(void)
	Determine maximum PCI bus number within system.
static __always_inline int	PCIAPI_INLINE (efi, pci_read_config_byte)(struct pci_device *pci
	Read byte from PCI configuration space via EFI.
Variables
static __always_inline int unsigned int	where