Commit 403a0293 authored Oct 06, 2024 by Avri Altman Committed by Ulf Hansson Oct 14, 2024

mmc: core: Add open-ended Ext memory addressing



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>

parent 93387385

drivers/mmc/core/block.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/mmc/core/core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);

include/linux/mmc/core.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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 {