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mmc: block: Support alternative_gpt_sector() operation

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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>
This commit is contained in:
Dmitry Osipenko
2021-08-20 03:45:35 +03:00
committed by Jens Axboe
parent 466d9c4904
commit dc913385dd
6 changed files with 62 additions and 0 deletions
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drivers/mmc/core/core.h
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@@ -119,6 +119,8 @@ void mmc_release_host(struct mmc_host *host);
void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx);
void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx);
int mmc_card_alternative_gpt_sector(struct mmc_card *card, sector_t *sector);
/**
* mmc_claim_host - exclusively claim a host
* @host: mmc host to claim