include/avb_verify.h

   1
   2 /*
   3  * (C) Copyright 2018, Linaro Limited
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef _AVB_VERIFY_H
   9 #define _AVB_VERIFY_H
  10
  11 #include <../lib/libavb/libavb.h>
  12 #include <mapmem.h>
  13 #include <mmc.h>
  14
  15 #define AVB_MAX_ARGS                    1024
  16 #define VERITY_TABLE_OPT_RESTART        "restart_on_corruption"
  17 #define VERITY_TABLE_OPT_LOGGING        "ignore_corruption"
  18 #define ALLOWED_BUF_ALIGN               8
  19
  20 enum avb_boot_state {
  21         AVB_GREEN,
  22         AVB_YELLOW,
  23         AVB_ORANGE,
  24         AVB_RED,
  25 };
  26
  27 struct AvbOpsData {
  28         struct AvbOps ops;
  29         int mmc_dev;
  30         enum avb_boot_state boot_state;
  31 #ifdef CONFIG_OPTEE_TA_AVB
  32         struct udevice *tee;
  33         u32 session;
  34 #endif
  35 };
  36
  37 struct mmc_part {
  38         int dev_num;
  39         struct mmc *mmc;
  40         struct blk_desc *mmc_blk;
  41         disk_partition_t info;
  42 };
  43
  44 enum mmc_io_type {
  45         IO_READ,
  46         IO_WRITE
  47 };
  48
  49 AvbOps *avb_ops_alloc(int boot_device);
  50 void avb_ops_free(AvbOps *ops);
  51
  52 char *avb_set_state(AvbOps *ops, enum avb_boot_state boot_state);
  53 char *avb_set_enforce_verity(const char *cmdline);
  54 char *avb_set_ignore_corruption(const char *cmdline);
  55
  56 char *append_cmd_line(char *cmdline_orig, char *cmdline_new);
  57
  58 /**
  59  * ============================================================================
  60  * I/O helper inline functions
  61  * ============================================================================
  62  */
  63 static inline uint64_t calc_offset(struct mmc_part *part, int64_t offset)
  64 {
  65         u64 part_size = part->info.size * part->info.blksz;
  66
  67         if (offset < 0)
  68                 return part_size + offset;
  69
  70         return offset;
  71 }
  72
  73 static inline size_t get_sector_buf_size(void)
  74 {
  75         return (size_t)CONFIG_FASTBOOT_BUF_SIZE;
  76 }
  77
  78 static inline void *get_sector_buf(void)
  79 {
  80         return map_sysmem(CONFIG_FASTBOOT_BUF_ADDR, CONFIG_FASTBOOT_BUF_SIZE);
  81 }
  82
  83 static inline bool is_buf_unaligned(void *buffer)
  84 {
  85         return (bool)((uintptr_t)buffer % ALLOWED_BUF_ALIGN);
  86 }
  87
  88 static inline int get_boot_device(AvbOps *ops)
  89 {
  90         struct AvbOpsData *data;
  91
  92         if (ops) {
  93                 data = ops->user_data;
  94                 if (data)
  95                         return data->mmc_dev;
  96         }
  97
  98         return -1;
  99 }
 100
 101 #endif /* _AVB_VERIFY_H */