1// Copyright 2016 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#pragma once
6
7#include <efi/types.h>
8#include <efi/boot-services.h>
9#include <efi/runtime-services.h>
10
11#define EFI_BLOCK_IO_PROTOCOL_GUID \
12    {0x964e5b21, 0x6459, 0x11d2, {0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b}}
13
14extern efi_guid BlockIoProtocol;
15
16#define EFI_BLOCK_IO_PROTOCOL_REVISION2 0x00020001
17#define EFI_BLOCK_IO_PROTOCOL_REVISION3 0x00020031
18
19typedef struct efi_block_io_media efi_block_io_media;
20typedef struct efi_block_io_protocol efi_block_io_protocol;
21
22struct efi_block_io_protocol {
23    uint64_t Revision;
24    efi_block_io_media* Media;
25    efi_status (*Reset)(efi_block_io_protocol* self,
26                        bool ExtendedVerification) EFIAPI;
27    efi_status (*ReadBlocks)(efi_block_io_protocol* self,
28                             uint32_t MediaId, uint64_t LBA,
29                             size_t BufferSize, void* Buffer) EFIAPI;
30    efi_status (*WriteBlocks)(efi_block_io_protocol* self,
31                              uint32_t MediaId, uint64_t LBA,
32                              size_t BufferSize, const void* Buffer) EFIAPI;
33    efi_status (*FlushBlocks)(efi_block_io_protocol* self);
34
35
36};
37
38struct efi_block_io_media {
39    // present in rev1
40    uint32_t MediaId;
41    bool RemovableMedia;
42    bool MediaPresent;
43    bool LogicalPartition;
44    bool ReadOnly;
45    bool WriteCaching;
46    uint8_t pad1[3];
47    uint32_t BlockSize;
48    uint32_t IoAlign;
49    uint8_t pad2[4];
50    uint64_t LastBlock;
51
52    // present in rev2
53    uint64_t LowestAlignedLba;
54    uint32_t LogicalBlocksPerPhysicalBlock;
55
56    // present in rev3
57    uint32_t OptimalTransferLengthGranularity;
58};
59