From: Avri Altman <avri.altman@wdc.com>
Date: Sun, 6 Oct 2024 05:11:42 +0000 (+0300)
Subject: mmc: core: Add open-ended Ext memory addressing
X-Git-Tag: v6.13-rc1~153^2~71
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=403a0293f1c230524e0185b31f69c02a6aed12c7;p=linux-block.git

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>
---

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index f4817ea3017b..c9325febc31a 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -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
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index d6c819dd68ed..a0b2999684b3 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -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);
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index f0ac2e469b32..a890a71288ef 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -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 {