| 1 | /* |
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| 2 | * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. |
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| 3 | * |
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| 4 | * This program is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU General Public License as |
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| 6 | * published by the Free Software Foundation; either version 2 of the |
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| 7 | * License, or any later version. |
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| 8 | * |
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| 9 | * This program is distributed in the hope that it will be useful, but |
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| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU General Public License |
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| 15 | * along with this program; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 17 | */ |
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| 18 | |
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| 19 | FILE_LICENCE ( GPL2_OR_LATER ); |
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| 20 | |
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| 21 | #include <errno.h> |
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| 22 | #include <gpxe/pci.h> |
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| 23 | #include <gpxe/efi/efi.h> |
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| 24 | #include <gpxe/efi/Protocol/PciRootBridgeIo.h> |
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| 25 | |
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| 26 | /** @file |
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| 27 | * |
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| 28 | * gPXE PCI I/O API for EFI |
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| 29 | * |
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| 30 | */ |
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| 31 | |
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| 32 | /** PCI root bridge I/O protocol */ |
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| 33 | static EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *efipci; |
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| 34 | EFI_REQUIRE_PROTOCOL ( EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL, &efipci ); |
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| 35 | |
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| 36 | static unsigned long efipci_address ( struct pci_device *pci, |
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| 37 | unsigned long location ) { |
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| 38 | return EFI_PCI_ADDRESS ( pci->bus, PCI_SLOT ( pci->devfn ), |
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| 39 | PCI_FUNC ( pci->devfn ), |
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| 40 | EFIPCI_OFFSET ( location ) ); |
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| 41 | } |
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| 42 | |
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| 43 | int efipci_read ( struct pci_device *pci, unsigned long location, |
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| 44 | void *value ) { |
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| 45 | EFI_STATUS efirc; |
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| 46 | |
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| 47 | if ( ( efirc = efipci->Pci.Read ( efipci, EFIPCI_WIDTH ( location ), |
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| 48 | efipci_address ( pci, location ), 1, |
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| 49 | value ) ) != 0 ) { |
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| 50 | DBG ( "EFIPCI config read from %02x:%02x.%x offset %02lx " |
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| 51 | "failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ), |
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| 52 | PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ), |
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| 53 | efi_strerror ( efirc ) ); |
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| 54 | return -EIO; |
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| 55 | } |
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| 56 | |
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| 57 | return 0; |
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| 58 | } |
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| 59 | |
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| 60 | int efipci_write ( struct pci_device *pci, unsigned long location, |
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| 61 | unsigned long value ) { |
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| 62 | EFI_STATUS efirc; |
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| 63 | |
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| 64 | if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ), |
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| 65 | efipci_address ( pci, location ), 1, |
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| 66 | &value ) ) != 0 ) { |
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| 67 | DBG ( "EFIPCI config write to %02x:%02x.%x offset %02lx " |
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| 68 | "failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ), |
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| 69 | PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ), |
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| 70 | efi_strerror ( efirc ) ); |
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| 71 | return -EIO; |
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| 72 | } |
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| 73 | |
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| 74 | return 0; |
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| 75 | } |
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| 76 | |
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| 77 | PROVIDE_PCIAPI_INLINE ( efi, pci_max_bus ); |
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| 78 | PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_byte ); |
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| 79 | PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_word ); |
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| 80 | PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_dword ); |
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| 81 | PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_byte ); |
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| 82 | PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_word ); |
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| 83 | PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_dword ); |
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