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| author | Dmitry Osipenko <digetx@gmail.com> | 2021-08-20 03:45:35 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-08-24 19:09:06 +0300 |
| commit | dc913385dd74e625271482c30aefedd1e5af7b8c (patch) | |
| tree | 4e9a7960d600179c7799501d4f89de4ebea2c9e1 /drivers/mmc/core/block.c | |
| parent | 466d9c4904deb25e2e8dcd29d3a998f4e3fa7c17 (diff) | |
| download | linux-dc913385dd74e625271482c30aefedd1e5af7b8c.tar.xz | |
mmc: block: Support alternative_gpt_sector() operation
Support generic alternative_gpt_sector() block device operation.
It calculates location of GPT entry for eMMC of NVIDIA Tegra Android
devices. Add new MMC_CAP2_ALT_GPT_TEGRA flag that enables scanning of
alternative GPT sector and add raw_boot_mult field to mmc_ext_csd
which allows to get size of the boot partitions that is needed for
the calculation.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210820004536.15791-4-digetx@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/mmc/core/block.c')
| -rw-r--r-- | drivers/mmc/core/block.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 4c11f171e56d..6a15fdf6e5f2 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -831,6 +831,26 @@ static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, } #endif +static int mmc_blk_alternative_gpt_sector(struct gendisk *disk, + sector_t *sector) +{ + struct mmc_blk_data *md; + int ret; + + md = mmc_blk_get(disk); + if (!md) + return -EINVAL; + + if (md->queue.card) + ret = mmc_card_alternative_gpt_sector(md->queue.card, sector); + else + ret = -ENODEV; + + mmc_blk_put(md); + + return ret; +} + static const struct block_device_operations mmc_bdops = { .open = mmc_blk_open, .release = mmc_blk_release, @@ -840,6 +860,7 @@ static const struct block_device_operations mmc_bdops = { #ifdef CONFIG_COMPAT .compat_ioctl = mmc_blk_compat_ioctl, #endif + .alternative_gpt_sector = mmc_blk_alternative_gpt_sector, }; static int mmc_blk_part_switch_pre(struct mmc_card *card, |