efi_pci.h File Reference

EFI driver interface. More...

#include <ipxe/pci.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/PciIo.h>

Go to the source code of this file.

Data Structures
struct	efi_pci_device
	An EFI PCI device. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static EFIAPI uint64_t	LShiftU64 (UINT64 value, UINTN shift)
int	efipci_info (EFI_HANDLE device, struct efi_pci_device *efipci)
	Get EFI PCI device information. More...

Detailed Description

EFI driver interface.

Definition in file efi_pci.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

LShiftU64()

static EFIAPI uint64_t LShiftU64 ( UINT64  value, UINTN  shift  )

inlinestatic

Definition at line 16 of file efi_pci.h.

                                                                      {
        return ( value << shift );
}

References value.

efipci_info()

int efipci_info	(	EFI_HANDLE	device,
		struct efi_pci_device *	efipci
	)

Get EFI PCI device information.

Parameters

device	EFI device handle
efipci	EFI PCI device to fill in

Return values

rc	Return status code

Definition at line 704 of file efi_pci.c.

                                                                     {
        EFI_PCI_IO_PROTOCOL *pci_io;
        UINTN pci_segment, pci_bus, pci_dev, pci_fn;
        unsigned int busdevfn;
        EFI_STATUS efirc;
        int rc;

        /* See if device is a PCI device */
        if ( ( rc = efi_open ( device, &efi_pci_io_protocol_guid,
                               &pci_io ) ) != 0 ) {
                DBGCP ( device, "EFIPCI %s cannot open PCI protocols: %s\n",
                        efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }
        efipci->io = pci_io;

        /* Get PCI bus:dev.fn address */
        if ( ( efirc = pci_io->GetLocation ( pci_io, &pci_segment, &pci_bus,
                                             &pci_dev, &pci_fn ) ) != 0 ) {
                rc = -EEFI ( efirc );
                DBGC ( device, "EFIPCI %s could not get PCI location: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }
        busdevfn = PCI_BUSDEVFN ( pci_segment, pci_bus, pci_dev, pci_fn );
        pci_init ( &efipci->pci, busdevfn );
        dma_init ( &efipci->pci.dma, &efipci_dma_operations );
        DBGCP ( device, "EFIPCI " PCI_FMT " is %s\n",
                PCI_ARGS ( &efipci->pci ), efi_handle_name ( device ) );

        /* Try to enable I/O cycles, memory cycles, and bus mastering.
         * Some platforms will 'helpfully' report errors if these bits
         * can't be enabled (for example, if the card doesn't actually
         * support I/O cycles).  Work around any such platforms by
         * enabling bits individually and simply ignoring any errors.
         */
        pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
                             EFI_PCI_IO_ATTRIBUTE_IO, NULL );
        pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
                             EFI_PCI_IO_ATTRIBUTE_MEMORY, NULL );
        pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
                             EFI_PCI_IO_ATTRIBUTE_BUS_MASTER, NULL );

        /* Populate PCI device */
        if ( ( rc = pci_read_config ( &efipci->pci ) ) != 0 ) {
                DBGC ( device, "EFIPCI " PCI_FMT " cannot read PCI "
                       "configuration: %s\n",
                       PCI_ARGS ( &efipci->pci ), strerror ( rc ) );
                return rc;
        }

        return 0;
}

References _EFI_PCI_IO_PROTOCOL::Attributes, busdevfn, DBGC, DBGCP, pci_device::dma, dma_init(), EEFI, efi_handle_name(), efi_open, EFI_PCI_IO_ATTRIBUTE_BUS_MASTER, EFI_PCI_IO_ATTRIBUTE_IO, EFI_PCI_IO_ATTRIBUTE_MEMORY, efi_pci_io_protocol_guid, efipci_dma_operations, EfiPciIoAttributeOperationEnable, _EFI_PCI_IO_PROTOCOL::GetLocation, efi_pci_device::io, NULL, efi_pci_device::pci, PCI_ARGS, PCI_BUSDEVFN, PCI_FMT, pci_init(), pci_read_config(), rc, and strerror().

Referenced by efi_bofm_start(), efi_bofm_supported(), efi_device_info_pci(), efipci_start(), and efipci_supported().