From: Corneliu Doban cdoban@broadcom.com
Add eMMC and GPT support. - GPT partition list and command to create the GPT added to u-boot environment - eMMC boot commands added to u-boot environment - new gpt commands (enumarate and setenv) that are used by broadcom update scripts and boot commands - eMMC specific u-boot configurations with environment saved in eMMC and GPT support
Signed-off-by: Corneliu Doban cdoban@broadcom.com Signed-off-by: Rayagonda Kokatanur rayagonda.kokatanur@broadcom.com --- Changes from v3: -Address review comments from Simon Glass, Return -ve number instead of 1 upon failure, Use shorter variable name, Modified code to avoid buffer overflow, Use if (!strcmp(...)) instead of if (strcmp(...) == 0)
Changes from v2: -Address review comments from Simon Glass, Check for return value of part_driver_get_count(), Don't check return value of part_driver_get(), Rewrite part_driver_get() and rename to part_driver_get_first(), Use env_set_ulong() whereever applicable,
-Address review comments from Michael Nazzareno Trimarchi, Add new function to set all env vriables,
Changes from v1: -Address review comments from Simon Glass, Correct function comments, Check for return value, Add helper function in part.h
cmd/gpt.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++++ include/part.h | 29 +++++++++ 2 files changed, 190 insertions(+)
diff --git a/cmd/gpt.c b/cmd/gpt.c index df759416c8..2626992e59 100644 --- a/cmd/gpt.c +++ b/cmd/gpt.c @@ -18,6 +18,7 @@ #include <command.h> #include <part.h> #include <part_efi.h> +#include <part.h> #include <exports.h> #include <uuid.h> #include <linux/ctype.h> @@ -621,6 +622,152 @@ static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part) return ret; }
+/** + * gpt_enumerate() - Enumerate partition names into environment variable. + * + * Enumerate partition names. Partition names are stored in gpt_partition_list + * environment variable. Each partition name is delimited by space. + * + * @desc: block device descriptor + * + * @Return: '0' on success and -ve error on failure + */ +static int gpt_enumerate(struct blk_desc *desc) +{ + struct part_driver *first_drv, *part_drv; + int str_len = 0, tmp_len; + char part_list[2048]; + int n_drvs; + char *ptr; + + part_list[0] = 0; + n_drvs = part_driver_get_count(); + if (!n_drvs) { + printf("Failed to get partition driver count\n"); + return -ENOENT; + } + + first_drv = part_driver_get_first(); + for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) { + struct disk_partition pinfo; + int ret; + int i; + + for (i = 1; i < part_drv->max_entries; i++) { + ret = part_drv->get_info(desc, i, &pinfo); + if (ret) { + /* no more entries in table */ + break; + } + + ptr = &part_list[str_len]; + tmp_len = strlen((const char *)pinfo.name); + str_len += tmp_len; + /* +1 for space */ + str_len++; + if (str_len > sizeof(part_list)) { + printf("Error insufficient memory\n"); + return -ENOMEM; + } + strcpy(ptr, (const char *)pinfo.name); + /* One byte for space(" ") delimiter */ + ptr[tmp_len] = ' '; + } + } + if (*part_list) + part_list[strlen(part_list) - 1] = 0; + debug("setenv gpt_partition_list %s\n", part_list); + + return env_set("gpt_partition_list", part_list); +} + +/** + * gpt_setenv_part_variables() - setup partition environmental variables + * + * Setup the gpt_partition_name, gpt_partition_entry, gpt_partition_addr + * and gpt_partition_size environment variables. + * + * @pinfo: pointer to disk partition + * @i: partition entry + * + * @Return: '0' on success and -ENOENT on failure + */ +static int gpt_setenv_part_variables(struct disk_partition *pinfo, int i) +{ + int ret; + + ret = env_set_ulong("gpt_partition_addr", pinfo->start); + if (ret) + goto fail; + + ret = env_set_ulong("gpt_partition_size", pinfo->size); + if (ret) + goto fail; + + ret = env_set_ulong("gpt_partition_entry", i); + if (ret) + goto fail; + + ret = env_set("gpt_partition_name", (const char *)pinfo->name); + if (ret) + goto fail; + + return 0; + +fail: + return -ENOENT; +} + +/** + * gpt_setenv() - Dynamically setup environment variables. + * + * Dynamically setup environment variables for name, index, offset and size + * for partition in GPT table after running "gpt setenv" for a partition name. + * + * @desc: block device descriptor + * @name: partition name + * + * @Return: '0' on success and -ve err on failure + */ +static int gpt_setenv(struct blk_desc *desc, const char *name) +{ + struct part_driver *first_drv, *part_drv; + int n_drvs; + int ret; + + n_drvs = part_driver_get_count(); + if (!n_drvs) { + printf("Failed to get partition driver count\n"); + goto fail; + } + + first_drv = part_driver_get_first(); + for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) { + struct disk_partition pinfo; + int i; + + for (i = 1; i < part_drv->max_entries; i++) { + ret = part_drv->get_info(desc, i, &pinfo); + if (ret) { + /* no more entries in table */ + break; + } + + if (!strcmp(name, (const char *)pinfo.name)) { + /* match found, setup environment variables */ + ret = gpt_setenv_part_variables(&pinfo, i); + if (ret) + goto fail; + + return 0; + } + } + } + +fail: + return ret; +} + static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr) { int ret; @@ -827,6 +974,10 @@ static int do_gpt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) } else if ((strcmp(argv[1], "verify") == 0)) { ret = gpt_verify(blk_dev_desc, argv[4]); printf("Verify GPT: "); + } else if ((strcmp(argv[1], "setenv") == 0)) { + ret = gpt_setenv(blk_dev_desc, argv[4]); + } else if ((strcmp(argv[1], "enumerate") == 0)) { + ret = gpt_enumerate(blk_dev_desc); } else if (strcmp(argv[1], "guid") == 0) { ret = do_disk_guid(blk_dev_desc, argv[4]); #ifdef CONFIG_CMD_GPT_RENAME @@ -857,7 +1008,17 @@ U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, " to interface\n" " Example usage:\n" " gpt write mmc 0 $partitions\n" + " - write the GPT to device\n" " gpt verify mmc 0 $partitions\n" + " - verify the GPT on device against $partitions\n" + " gpt setenv mmc 0 $name\n" + " - setup environment variables for partition $name:\n" + " gpt_partition_addr, gpt_partition_size,\n" + " gpt_partition_name, gpt_partition_entry\n" + " gpt enumerate mmc 0\n" + " - store list of partitions to gpt_partition_list environment variable\n" + " read <interface> <dev>\n" + " - read GPT into a data structure for manipulation\n" " gpt guid <interface> <dev>\n" " - print disk GUID\n" " gpt guid <interface> <dev> <varname>\n" diff --git a/include/part.h b/include/part.h index 55be724d20..31a130311a 100644 --- a/include/part.h +++ b/include/part.h @@ -9,6 +9,7 @@ #include <blk.h> #include <ide.h> #include <uuid.h> +#include <linker_lists.h> #include <linux/list.h>
struct block_drvr { @@ -476,5 +477,33 @@ int write_mbr_partition(struct blk_desc *dev_desc, void *buf);
#endif
+#ifdef CONFIG_PARTITIONS +/** + * part_driver_get_count() - get partition driver count + * + * @return - number of partition drivers + */ +static inline int part_driver_get_count(void) +{ + return ll_entry_count(struct part_driver, part_driver); +} + +/** + * part_driver_get_first() - get first partition driver + * + * @return - pointer to first partition driver on success, otherwise NULL + */ +static inline struct part_driver *part_driver_get_first(void) +{ + return ll_entry_start(struct part_driver, part_driver); +} + +#else +static inline int part_driver_get_count(void) +{ return 0; } + +static inline struct part_driver *part_driver_get_first(void) +{ return NULL; } +#endif /* CONFIG_PARTITIONS */
#endif /* _PART_H */