[PATCH] cmd: gpt: add eMMC and GPT support

[Rayagonda Kokatanur]

On Tue, May 5, 2020 at 5:43 PM Rayagonda Kokatanur
<rayagonda.kokatanur at broadcom.com> wrote:
>
> From: Corneliu Doban <cdoban at 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 at broadcom.com>
> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur at broadcom.com>
>
> diff --git a/cmd/gpt.c b/cmd/gpt.c
> index b8d11c167d..c32e272b25 100644
> --- a/cmd/gpt.c
> +++ b/cmd/gpt.c
> @@ -616,6 +616,87 @@ static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part)
>         return ret;
>  }
>
> +/*
> + * Enumerate partition names into environment variable.
> + */
> +static int gpt_enumerate(struct blk_desc *blk_dev_desc)
> +{
> +       disk_partition_t pinfo;
> +       struct part_driver *first_drv =
> +               ll_entry_start(struct part_driver, part_driver);
> +       const int n_drvs = ll_entry_count(struct part_driver, part_driver);
> +       struct part_driver *part_drv;
> +       char part_list[2048];
> +
> +       part_list[0] = 0;
> +
> +       for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) {
> +               int ret;
> +               int i;
> +
> +               for (i = 1; i < part_drv->max_entries; i++) {
> +                       ret = part_drv->get_info(blk_dev_desc, i, &pinfo);
> +                       if (ret != 0) {
> +                               /* no more entries in table */
> +                               break;
> +                       }
> +                       strcat(part_list, (const char *)pinfo.name);
> +                       strcat(part_list, " ");
> +               }
> +       }
> +       if (strlen(part_list) > 0)
> +               part_list[strlen(part_list) - 1] = 0;
> +       debug("setenv gpt_partition_list %s\n", part_list);
> +       env_set("gpt_partition_list", part_list);
> +       return 0;
> +}
> +
> +/*
> + * Dynamically setup environment variables for name, index, offset and size
> + * for partition in GPT table after running "gpt setenv" for a partition name.
> + * gpt_partition_name, gpt_partition_entry, gpt_partition_addr and
> + * gpt_partition_size environment variables will be set.
> + */
> +static int gpt_setenv(struct blk_desc *blk_dev_desc, const char *name)
> +{
> +       disk_partition_t pinfo;
> +       struct part_driver *first_drv =
> +               ll_entry_start(struct part_driver, part_driver);
> +       const int n_drvs = ll_entry_count(struct part_driver, part_driver);
> +       struct part_driver *part_drv;
> +       char buf[32];
> +
> +       for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) {
> +               int ret;
> +               int i;
> +
> +               for (i = 1; i < part_drv->max_entries; i++) {
> +                       ret = part_drv->get_info(blk_dev_desc, i, &pinfo);
> +                       if (ret != 0) {
> +                               /* no more entries in table */
> +                               break;
> +                       }
> +                       if (strcmp(name, (const char *)pinfo.name) == 0) {
> +                               /* match found, setup environment variables */
> +                               sprintf(buf, LBAF, pinfo.start);
> +                               debug("setenv gpt_partition_addr %s\n", buf);
> +                               env_set("gpt_partition_addr", buf);
> +                               sprintf(buf, LBAF, pinfo.size);
> +                               debug("setenv gpt_partition_size %s\n", buf);
> +                               env_set("gpt_partition_size", buf);
> +                               sprintf(buf, "%d", i);
> +                               debug("setenv gpt_partition_entry %s\n", buf);
> +                               env_set("gpt_partition_entry", buf);
> +                               sprintf(buf, "%s", pinfo.name);
> +                               debug("setenv gpt_partition_name %s\n", buf);
> +                               env_set("gpt_partition_name", buf);
> +                               return 0;
> +                       }
> +               }
> +       }
> +       return -1;
> +}
> +
>  static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr)
>  {
>         int ret;
> @@ -822,6 +903,10 @@ static int do_gpt(cmd_tbl_t *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
> @@ -852,7 +937,17 @@ 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"
> --
> 2.17.1
>

Please ignore this patch, forgot to add "PATCH v1" in the subject line.
Will send another  patch.