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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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1
include/linux/mmc/card.h
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@@ -109,6 +109,7 @@ struct mmc_ext_csd {
u8 raw_hc_erase_gap_size; /* 221 */
u8 raw_erase_timeout_mult; /* 223 */
u8 raw_hc_erase_grp_size; /* 224 */
u8 raw_boot_mult; /* 226 */
u8 raw_sec_trim_mult; /* 229 */
u8 raw_sec_erase_mult; /* 230 */
u8 raw_sec_feature_support;/* 231 */

1
include/linux/mmc/host.h
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@@ -398,6 +398,7 @@ struct mmc_host {
#else
#define MMC_CAP2_CRYPTO 0
#endif
#define MMC_CAP2_ALT_GPT_TEGRA (1 << 28) /* Host with eMMC that has GPT entry at a non-standard location */
int fixed_drv_type; /* fixed driver type for non-removable media */