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mmc: core: Add open-ended Ext memory addressing

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For open-ended read/write - just send CMD22 before issuing the command.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20241006051148.160278-5-avri.altman@wdc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Avri Altman 2024-10-06 08:11:42 +03:00 • committed by Ulf Hansson
parent 933873852c
commit 403a0293f1
3 changed files with 12 additions and 0 deletions
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5
drivers/mmc/core/block.c
View file

@ -1759,6 +1759,11 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
brq->mrq.sbc = &brq->sbc;
}
if (mmc_card_ult_capacity(card)) {
brq->cmd.ext_addr = blk_rq_pos(req) >> 32;
brq->cmd.has_ext_addr = true;
}
}
#define MMC_MAX_RETRIES 5

3
drivers/mmc/core/core.c
View file

@ -336,6 +336,9 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
int err;
if (mrq->cmd && mrq->cmd->has_ext_addr)
mmc_send_ext_addr(host, mrq->cmd->ext_addr);
init_completion(&mrq->cmd_completion);
mmc_retune_hold(host);

4
include/linux/mmc/core.h
View file

@ -96,6 +96,10 @@ struct mmc_command {
unsigned int busy_timeout; /* busy detect timeout in ms */
struct mmc_data *data; /* data segment associated with cmd */
struct mmc_request *mrq; /* associated request */
/* for SDUC */
bool has_ext_addr;
u8 ext_addr;
};
struct mmc_data {