Ejemplo n.º 1
0
/**
 * Write to PCI configuration space
 *
 * @v pci		PCI device
 * @v location		Encoded offset and width
 * @v value		Value
 * @ret rc		Return status code
 */
int efipci_write ( struct pci_device *pci, unsigned long location,
		   unsigned long value ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *root;
	EFI_HANDLE handle;
	EFI_STATUS efirc;
	int rc;

	/* Identify root bridge */
	if ( ( rc = efipci_root ( pci, &handle, &root ) ) != 0 )
		goto err_root;

	/* Read from configuration space */
	if ( ( efirc = root->Pci.Write ( root, EFIPCI_WIDTH ( location ),
					 efipci_address ( pci, location ), 1,
					 &value ) ) != 0 ) {
		rc = -EEFI ( efirc );
		DBGC ( pci, "EFIPCI " PCI_FMT " config write to offset %02lx "
		       "failed: %s\n", PCI_ARGS ( pci ),
		       EFIPCI_OFFSET ( location ), strerror ( rc ) );
		goto err_write;
	}

 err_write:
	bs->CloseProtocol ( handle, &efi_pci_root_bridge_io_protocol_guid,
			    efi_image_handle, handle );
 err_root:
	return rc;
}
Ejemplo n.º 2
0
Archivo: efi_pci.c Proyecto: grze/ipxe
static unsigned long efipci_address ( struct pci_device *pci,
				      unsigned long location ) {
	return EFI_PCI_ADDRESS ( PCI_BUS ( pci->busdevfn ),
				 PCI_SLOT ( pci->busdevfn ),
				 PCI_FUNC ( pci->busdevfn ),
				 EFIPCI_OFFSET ( location ) );
}
Ejemplo n.º 3
0
int efipci_write ( struct pci_device *pci, unsigned long location,
		   unsigned long value ) {
	EFI_STATUS efirc;

	if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ),
					   efipci_address ( pci, location ), 1,
					   &value ) ) != 0 ) {
		DBG ( "EFIPCI config write to %02x:%02x.%x offset %02lx "
		      "failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ),
		      PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
		      efi_strerror ( efirc ) );
		return -EIO;
	}

	return 0;
}
Ejemplo n.º 4
0
Archivo: efi_pci.c Proyecto: grze/ipxe
int efipci_write ( struct pci_device *pci, unsigned long location,
		   unsigned long value ) {
	EFI_STATUS efirc;
	int rc;

	if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ),
					   efipci_address ( pci, location ), 1,
					   &value ) ) != 0 ) {
		rc = -EEFI ( efirc );
		DBG ( "EFIPCI config write to " PCI_FMT " offset %02lx "
		      "failed: %s\n", PCI_ARGS ( pci ),
		      EFIPCI_OFFSET ( location ), strerror ( rc ) );
		return -EIO;
	}

	return 0;
}