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![Michael Scott](/assets/img/avatar_default.png)
Implement an alias name check for devices where GPT limitations prevent user-friendly partition names such as "boot", "system" and "cache". Or, where the actual partition name doesn't match a standard partition name used commonly with fastboot. To set an alias, add an environment setting as follows: fastboot_partition_alias_<alias partition name>=<actual partition name> Example: fastboot_partition_alias_boot=LNX Signed-off-by: Michael Scott <michael.scott@linaro.org> Acked-by: Steve Rae <srae@broadcom.com> Cc: Steve Rae <srae@broadcom.com> Cc: Lukasz Majewski <l.majewski@samsung.com>
191 lines
5.0 KiB
C
191 lines
5.0 KiB
C
/*
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* Copyright 2014 Broadcom Corporation.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <common.h>
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#include <fb_mmc.h>
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#include <part.h>
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#include <aboot.h>
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#include <sparse_format.h>
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#include <mmc.h>
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#ifndef CONFIG_FASTBOOT_GPT_NAME
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#define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
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#endif
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/* The 64 defined bytes plus the '\0' */
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#define RESPONSE_LEN (64 + 1)
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static char *response_str;
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void fastboot_fail(const char *s)
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{
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strncpy(response_str, "FAIL\0", 5);
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strncat(response_str, s, RESPONSE_LEN - 4 - 1);
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}
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void fastboot_okay(const char *s)
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{
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strncpy(response_str, "OKAY\0", 5);
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strncat(response_str, s, RESPONSE_LEN - 4 - 1);
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}
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static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc,
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const char *name, disk_partition_t *info)
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{
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int ret;
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ret = get_partition_info_efi_by_name(dev_desc, name, info);
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if (ret) {
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/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
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char env_alias_name[25 + 32 + 1];
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char *aliased_part_name;
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/* check for alias */
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strcpy(env_alias_name, "fastboot_partition_alias_");
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strncat(env_alias_name, name, 32);
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aliased_part_name = getenv(env_alias_name);
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if (aliased_part_name != NULL)
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ret = get_partition_info_efi_by_name(dev_desc,
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aliased_part_name, info);
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}
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return ret;
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}
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static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
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const char *part_name, void *buffer,
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unsigned int download_bytes)
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{
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lbaint_t blkcnt;
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lbaint_t blks;
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/* determine number of blocks to write */
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blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
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blkcnt = blkcnt / info->blksz;
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if (blkcnt > info->size) {
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error("too large for partition: '%s'\n", part_name);
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fastboot_fail("too large for partition");
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return;
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}
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puts("Flashing Raw Image\n");
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blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt,
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buffer);
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if (blks != blkcnt) {
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error("failed writing to device %d\n", dev_desc->dev);
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fastboot_fail("failed writing to device");
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return;
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}
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printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
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part_name);
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fastboot_okay("");
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}
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void fb_mmc_flash_write(const char *cmd, void *download_buffer,
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unsigned int download_bytes, char *response)
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{
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block_dev_desc_t *dev_desc;
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disk_partition_t info;
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/* initialize the response buffer */
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response_str = response;
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dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
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error("invalid mmc device\n");
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fastboot_fail("invalid mmc device");
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return;
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}
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if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
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printf("%s: updating MBR, Primary and Backup GPT(s)\n",
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__func__);
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if (is_valid_gpt_buf(dev_desc, download_buffer)) {
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printf("%s: invalid GPT - refusing to write to flash\n",
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__func__);
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fastboot_fail("invalid GPT partition");
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return;
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}
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if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
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printf("%s: writing GPT partitions failed\n", __func__);
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fastboot_fail("writing GPT partitions failed");
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return;
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}
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printf("........ success\n");
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fastboot_okay("");
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return;
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} else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
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error("cannot find partition: '%s'\n", cmd);
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fastboot_fail("cannot find partition");
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return;
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}
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if (is_sparse_image(download_buffer))
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write_sparse_image(dev_desc, &info, cmd, download_buffer,
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download_bytes);
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else
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write_raw_image(dev_desc, &info, cmd, download_buffer,
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download_bytes);
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}
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void fb_mmc_erase(const char *cmd, char *response)
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{
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int ret;
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block_dev_desc_t *dev_desc;
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disk_partition_t info;
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lbaint_t blks, blks_start, blks_size, grp_size;
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struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (mmc == NULL) {
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error("invalid mmc device");
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fastboot_fail("invalid mmc device");
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return;
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}
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/* initialize the response buffer */
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response_str = response;
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dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
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error("invalid mmc device");
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fastboot_fail("invalid mmc device");
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return;
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}
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ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info);
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if (ret) {
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error("cannot find partition: '%s'", cmd);
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fastboot_fail("cannot find partition");
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return;
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}
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/* Align blocks to erase group size to avoid erasing other partitions */
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grp_size = mmc->erase_grp_size;
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blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
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if (info.size >= grp_size)
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blks_size = (info.size - (blks_start - info.start)) &
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(~(grp_size - 1));
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else
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blks_size = 0;
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printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
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blks_start, blks_start + blks_size);
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blks = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size);
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if (blks != blks_size) {
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error("failed erasing from device %d", dev_desc->dev);
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fastboot_fail("failed erasing from device");
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return;
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}
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printf("........ erased " LBAFU " bytes from '%s'\n",
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blks_size * info.blksz, cmd);
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fastboot_okay("");
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}
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