[PATCH v7 1/2] mmc: Allow host driver to control the re-programming of crypto keys

[Neeraj Soni]

The register context for the crypto profile belongs to the
sdhci/cqhci host and not the mmc card, hence re-programming should be
managed by the host driver itself.

Add the flag MMC_CAP2_CRYPTO_NO_REPROG as part of host->caps2 to control
reprogramming keys to crypto engine for SoCs which do not require this
feature.

Signed-off-by: Seshu Madhavi Puppala <quic_spuppala@xxxxxxxxxxx>
Co-developed-by: Ram Prakash Gupta <quic_rampraka@xxxxxxxxxxx>
Signed-off-by: Ram Prakash Gupta <quic_rampraka@xxxxxxxxxxx>
Co-developed-by: Sarthak Garg <quic_sartgarg@xxxxxxxxxxx>
Signed-off-by: Sarthak Garg <quic_sartgarg@xxxxxxxxxxx>
Signed-off-by: Debraj Mukhopadhyay <quic_dmukhopa@xxxxxxxxxxx>
Reviewed-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Neeraj Soni <neeraj.soni@xxxxxxxxxxxxxxxx>
---
 drivers/mmc/core/crypto.c | 2 +-
 include/linux/mmc/host.h  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/crypto.c b/drivers/mmc/core/crypto.c
index fec4fbf16a5b..a5a90bfc634e 100644
--- a/drivers/mmc/core/crypto.c
+++ b/drivers/mmc/core/crypto.c
@@ -15,7 +15,7 @@
 void mmc_crypto_set_initial_state(struct mmc_host *host)
 {
 	/* Reset might clear all keys, so reprogram all the keys. */
-	if (host->caps2 & MMC_CAP2_CRYPTO)
+	if ((host->caps2 & MMC_CAP2_CRYPTO) && !(host->caps2 & MMC_CAP2_CRYPTO_NO_REPROG))
 		blk_crypto_reprogram_all_keys(&host->crypto_profile);
 }
 
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ba84f02c2a10..3c3c45fdf39b 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -463,6 +463,7 @@ struct mmc_host {
 #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 */
+#define MMC_CAP2_CRYPTO_NO_REPROG (1 << 29)	/* Host handles inline crypto key reprogramming */
 
 	bool			uhs2_sd_tran;	/* UHS-II flag for SD_TRAN state */
 	bool			uhs2_app_cmd;	/* UHS-II flag for APP command */
-- 
2.34.1