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fastboot: Allow u-boot-style partitions 

This adds support for partitions of the form "dev.hwpart:part" and
"dev#partname". This allows one to flash to eMMC boot partitions without
having to use CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT. It also allows one to
flash to an entire device without needing CONFIG_FASTBOOT_MMC_USER_NAME.
Lastly, one can also flash MMC devices other than
CONFIG_FASTBOOT_FLASH_MMC_DEV.

Because devices can be specified explicitly, CONFIG_FASTBOOT_FLASH_MMC_DEV
is used only when necessary for existing functionality. For those cases,
fastboot_mmc_get_dev has been added as a helper function. This allows

There should be no conflicts with the existing system, but just in case, I
have ordered detection of these names after all existing names.

The fastboot_mmc_part test has been updated for these new names.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sean Anderson 2021-02-05 09:39:00 -05:00 committed by Marek Vasut
parent ae5e6b4e8f
commit de1728ce4c
2 changed files with 132 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

157
drivers/fastboot/fb_mmc.c
View File

@ -76,12 +76,37 @@ static int raw_part_get_info_by_name(struct blk_desc *dev_desc,
return 0;
}
static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
const char *name, struct disk_partition *info)
static int do_get_part_info(struct blk_desc **dev_desc, const char *name,
struct disk_partition *info)
{
int ret;
ret = part_get_info_by_name(dev_desc, name, info);
/* First try partition names on the default device */
*dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (*dev_desc) {
ret = part_get_info_by_name(*dev_desc, name, info);
if (ret >= 0)
return ret;
/* Then try raw partitions */
ret = raw_part_get_info_by_name(*dev_desc, name, info);
if (ret >= 0)
return ret;
}
/* Then try dev.hwpart:part */
ret = part_get_info_by_dev_and_name_or_num("mmc", name, dev_desc,
info, true);
return ret;
}
static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc,
const char *name,
struct disk_partition *info)
{
int ret;
ret = do_get_part_info(dev_desc, name, info);
if (ret < 0) {
/* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
char env_alias_name[25 + PART_NAME_LEN + 1];
@ -92,8 +117,8 @@ static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
strncat(env_alias_name, name, PART_NAME_LEN);
aliased_part_name = env_get(env_alias_name);
if (aliased_part_name != NULL)
ret = part_get_info_by_name(dev_desc,
aliased_part_name, info);
ret = do_get_part_info(dev_desc, aliased_part_name,
info);
}
return ret;
}
@ -430,27 +455,49 @@ int fastboot_mmc_get_part_info(const char *part_name,
struct blk_desc **dev_desc,
struct disk_partition *part_info, char *response)
{
int r = 0;
int ret;
*dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (!*dev_desc) {
fastboot_fail("block device not found", response);
return -ENOENT;
}
if (!part_name || !strcmp(part_name, "")) {
fastboot_fail("partition not given", response);
return -ENOENT;
}
if (raw_part_get_info_by_name(*dev_desc, part_name, part_info) < 0) {
r = part_get_info_by_name_or_alias(*dev_desc, part_name, part_info);
if (r < 0) {
fastboot_fail("partition not found", response);
return r;
ret = part_get_info_by_name_or_alias(dev_desc, part_name, part_info);
if (ret < 0) {
switch (ret) {
case -ENOSYS:
case -EINVAL:
fastboot_fail("invalid partition or device", response);
break;
case -ENODEV:
fastboot_fail("no such device", response);
break;
case -ENOENT:
fastboot_fail("no such partition", response);
break;
case -EPROTONOSUPPORT:
fastboot_fail("unknown partition table type", response);
break;
default:
fastboot_fail("unanticipated error", response);
break;
}
}
return r;
return ret;
}
static struct blk_desc *fastboot_mmc_get_dev(char *response)
{
struct blk_desc *ret = blk_get_dev("mmc",
CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (!ret || ret->type == DEV_TYPE_UNKNOWN) {
pr_err("invalid mmc device\n");
fastboot_fail("invalid mmc device", response);
return NULL;
}
return ret;
}
/**
@ -467,22 +514,19 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
struct blk_desc *dev_desc;
struct disk_partition info;
dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
pr_err("invalid mmc device\n");
fastboot_fail("invalid mmc device", response);
return;
}
#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
fb_mmc_boot_ops(dev_desc, download_buffer, 1,
download_bytes, response);
dev_desc = fastboot_mmc_get_dev(response);
if (dev_desc)
fb_mmc_boot_ops(dev_desc, download_buffer, 1,
download_bytes, response);
return;
}
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) {
fb_mmc_boot_ops(dev_desc, download_buffer, 2,
download_bytes, response);
dev_desc = fastboot_mmc_get_dev(response);
if (dev_desc)
fb_mmc_boot_ops(dev_desc, download_buffer, 1,
download_bytes, response);
return;
}
#endif
@ -494,6 +538,10 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0 ||
strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
#endif
dev_desc = fastboot_mmc_get_dev(response);
if (!dev_desc)
return;
printf("%s: updating MBR, Primary and Backup GPT(s)\n",
__func__);
if (is_valid_gpt_buf(dev_desc, download_buffer)) {
@ -517,6 +565,10 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
#if CONFIG_IS_ENABLED(DOS_PARTITION)
if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
dev_desc = fastboot_mmc_get_dev(response);
if (!dev_desc)
return;
printf("%s: updating MBR\n", __func__);
if (is_valid_dos_buf(download_buffer)) {
printf("%s: invalid MBR - refusing to write to flash\n",
@ -539,19 +591,16 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
#ifdef CONFIG_ANDROID_BOOT_IMAGE
if (strncasecmp(cmd, "zimage", 6) == 0) {
fb_mmc_update_zimage(dev_desc, download_buffer,
download_bytes, response);
dev_desc = fastboot_mmc_get_dev(response);
if (dev_desc)
fb_mmc_update_zimage(dev_desc, download_buffer,
download_bytes, response);
return;
}
#endif
if (raw_part_get_info_by_name(dev_desc, cmd, &info) != 0) {
if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
pr_err("cannot find partition: '%s'\n", cmd);
fastboot_fail("cannot find partition", response);
return;
}
}
if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
return;
if (is_sparse_image(download_buffer)) {
struct fb_mmc_sparse sparse_priv;
@ -594,28 +643,19 @@ void fastboot_mmc_erase(const char *cmd, char *response)
lbaint_t blks, blks_start, blks_size, grp_size;
struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (mmc == NULL) {
pr_err("invalid mmc device\n");
fastboot_fail("invalid mmc device", response);
return;
}
dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
pr_err("invalid mmc device\n");
fastboot_fail("invalid mmc device", response);
return;
}
#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
/* erase EMMC boot1 */
fb_mmc_boot_ops(dev_desc, NULL, 1, 0, response);
dev_desc = fastboot_mmc_get_dev(response);
if (dev_desc)
fb_mmc_boot_ops(dev_desc, NULL, 1, 0, response);
return;
}
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) {
/* erase EMMC boot2 */
fb_mmc_boot_ops(dev_desc, NULL, 2, 0, response);
dev_desc = fastboot_mmc_get_dev(response);
if (dev_desc)
fb_mmc_boot_ops(dev_desc, NULL, 1, 0, response);
return;
}
#endif
@ -623,6 +663,10 @@ void fastboot_mmc_erase(const char *cmd, char *response)
#ifdef CONFIG_FASTBOOT_MMC_USER_SUPPORT
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
/* erase EMMC userdata */
dev_desc = fastboot_mmc_get_dev(response);
if (!dev_desc)
return;
if (fb_mmc_erase_mmc_hwpart(dev_desc))
fastboot_fail("Failed to erase EMMC_USER", response);
else
@ -631,13 +675,8 @@ void fastboot_mmc_erase(const char *cmd, char *response)
}
#endif
if (raw_part_get_info_by_name(dev_desc, cmd, &info) != 0) {
if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
pr_err("cannot find partition: '%s'\n", cmd);
fastboot_fail("cannot find partition", response);
return;
}
}
if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
return;
/* Align blocks to erase group size to avoid erasing other partitions */
grp_size = mmc->erase_grp_size;

37
test/dm/fastboot.c
View File

@ -35,9 +35,12 @@ static int dm_test_fastboot_mmc_part(struct unit_test_state *uts)
},
};
ut_assertok(blk_get_device_by_str("mmc",
__stringify(CONFIG_FASTBOOT_FLASH_MMC_DEV),
&mmc_dev_desc));
/*
* There are a lot of literal 0s I don't want to have to construct from
* MMC_DEV.
*/
ut_asserteq(0, CONFIG_FASTBOOT_FLASH_MMC_DEV);
ut_assertok(blk_get_device_by_str("mmc", "0", &mmc_dev_desc));
if (CONFIG_IS_ENABLED(RANDOM_UUID)) {
gen_rand_uuid_str(parts[0].uuid, UUID_STR_FORMAT_STD);
gen_rand_uuid_str(parts[1].uuid, UUID_STR_FORMAT_STD);
@ -59,6 +62,34 @@ static int dm_test_fastboot_mmc_part(struct unit_test_state *uts)
&part_info, response));
ut_assertok(env_set(FB_ALIAS_PREFIX "test3", NULL));
/* "New" partition labels */
ut_asserteq(1, fastboot_mmc_get_part_info("#test1", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0#test1", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0.0#test1", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0:1", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0.0:1", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info("0.0", &fb_dev_desc,
&part_info, response));
ut_asserteq(0, fastboot_mmc_get_part_info("0:0", &fb_dev_desc,
&part_info, response));
ut_asserteq(0, fastboot_mmc_get_part_info("0.0:0", &fb_dev_desc,
&part_info, response));
ut_asserteq(0, fastboot_mmc_get_part_info("1", &fb_dev_desc,
&part_info, response));
ut_asserteq(0, fastboot_mmc_get_part_info("1.0", &fb_dev_desc,
&part_info, response));
ut_asserteq(1, fastboot_mmc_get_part_info(":1", &fb_dev_desc,
&part_info, response));
ut_asserteq(0, fastboot_mmc_get_part_info(":0", &fb_dev_desc,
&part_info, response));
return 0;
}
DM_TEST(dm_test_fastboot_mmc_part, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);