Allow the user to specify two UBI volumes to use for the environment
Signed-off-by: Joe Hershberger joe.hershberger@ni.com --- Changes in v3: None Changes in v2: - Added curly braces on "multi-line" statements
README | 6 +++ common/env_ubi.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++ include/environment.h | 3 ++ tools/env/fw_env.c | 3 ++ 4 files changed, 129 insertions(+)
diff --git a/README b/README index 37ef694..598b674 100644 --- a/README +++ b/README @@ -3540,6 +3540,12 @@ but it can not erase, write this NOR flash by SRIO or PCIE interface. Define this to the name of the volume that you want to store the environment in.
+ - CONFIG_ENV_UBI_VOLUME_REDUND: + + Define this to the name of another volume to store a second copy of + the environment in. This will enable redundant environments in UBI. + It is assumed that both volumes are in the same MTD partition. + - CONFIG_UBI_SILENCE_MSG - CONFIG_UBIFS_SILENCE_MSG
diff --git a/common/env_ubi.c b/common/env_ubi.c index 0c592a6..1ed8b02 100644 --- a/common/env_ubi.c +++ b/common/env_ubi.c @@ -47,6 +47,58 @@ int env_init(void) }
#ifdef CONFIG_CMD_SAVEENV +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT +static unsigned char env_flags; + +int saveenv(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); + ssize_t len; + char *res; + + res = (char *)&env_new->data; + len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL); + if (len < 0) { + error("Cannot export environment: errno = %d\n", errno); + return 1; + } + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition "%s"\n", + CONFIG_ENV_UBI_PART); + return 1; + } + + env_new->crc = crc32(0, env_new->data, ENV_SIZE); + env_new->flags = ++env_flags; /* increase the serial */ + + if (gd->env_valid == 1) { + puts("Writing to redundant UBI... "); + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND, + (void *)env_new, CONFIG_ENV_SIZE)) { + printf("\n** Unable to write env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + CONFIG_ENV_UBI_VOLUME_REDUND); + return 1; + } + } else { + puts("Writing to UBI... "); + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, + (void *)env_new, CONFIG_ENV_SIZE)) { + printf("\n** Unable to write env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + CONFIG_ENV_UBI_VOLUME); + return 1; + } + } + + puts("done\n"); + + gd->env_valid = gd->env_valid == 2 ? 1 : 2; + + return 0; +} +#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ int saveenv(void) { ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); @@ -78,8 +130,72 @@ int saveenv(void) puts("done\n"); return 0; } +#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ #endif /* CONFIG_CMD_SAVEENV */
+#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT +void env_relocate_spec(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE); + ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE); + int crc1_ok = 0, crc2_ok = 0; + env_t *ep, *tmp_env1, *tmp_env2; + + tmp_env1 = (env_t *)env1_buf; + tmp_env2 = (env_t *)env2_buf; + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition "%s"\n", + CONFIG_ENV_UBI_PART); + set_default_env(NULL); + return; + } + + if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to read env from %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); + } + + if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to read redundant env from %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND); + } + + crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc; + crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc; + + if (!crc1_ok && !crc2_ok) { + set_default_env("!bad CRC"); + return; + } else if (crc1_ok && !crc2_ok) { + gd->env_valid = 1; + } else if (!crc1_ok && crc2_ok) { + gd->env_valid = 2; + } else { + /* both ok - check serial */ + if (tmp_env1->flags == 255 && tmp_env2->flags == 0) + gd->env_valid = 2; + else if (tmp_env2->flags == 255 && tmp_env1->flags == 0) + gd->env_valid = 1; + else if (tmp_env1->flags > tmp_env2->flags) + gd->env_valid = 1; + else if (tmp_env2->flags > tmp_env1->flags) + gd->env_valid = 2; + else /* flags are equal - almost impossible */ + gd->env_valid = 1; + } + + if (gd->env_valid == 1) + ep = tmp_env1; + else + ep = tmp_env2; + + env_flags = ep->flags; + env_import((char *)ep, 0); +} +#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ void env_relocate_spec(void) { ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); @@ -101,3 +217,4 @@ void env_relocate_spec(void)
env_import(buf, 1); } +#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ diff --git a/include/environment.h b/include/environment.h index ece073f..4c6a37b 100644 --- a/include/environment.h +++ b/include/environment.h @@ -103,6 +103,9 @@ extern unsigned long nand_env_oob_offset; # ifndef CONFIG_ENV_UBI_VOLUME # error "Need to define CONFIG_ENV_UBI_VOLUME when using CONFIG_ENV_IS_IN_UBI" # endif +# if defined(CONFIG_ENV_UBI_VOLUME_REDUND) +# define CONFIG_SYS_REDUNDAND_ENVIRONMENT +# endif # ifndef CONFIG_ENV_SIZE # error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_UBI" # endif diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c index 0dee682..01fc1d4 100644 --- a/tools/env/fw_env.c +++ b/tools/env/fw_env.c @@ -1149,6 +1149,9 @@ int fw_env_open(void) } else if (DEVTYPE(dev_current) == MTD_DATAFLASH && DEVTYPE(!dev_current) == MTD_DATAFLASH) { environment.flag_scheme = FLAG_BOOLEAN; + } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME && + DEVTYPE(!dev_current) == MTD_UBIVOLUME) { + environment.flag_scheme = FLAG_INCREMENTAL; } else { fprintf (stderr, "Incompatible flash types!\n"); return -1;