1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/mmc/core/crypto.c b/drivers/mmc/core/crypto.c
new file mode 100644
index 000000000..fec4fbf16
--- /dev/null
+++ b/drivers/mmc/core/crypto.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MMC crypto engine (inline encryption) support
+ *
+ * Copyright 2020 Google LLC
+ */
+
+#include <linux/blk-crypto.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "crypto.h"
+#include "queue.h"
+
+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)
+		blk_crypto_reprogram_all_keys(&host->crypto_profile);
+}
+
+void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host)
+{
+	if (host->caps2 & MMC_CAP2_CRYPTO)
+		blk_crypto_register(&host->crypto_profile, q);
+}
+EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
+
+void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq)
+{
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	struct mmc_request *mrq = &mqrq->brq.mrq;
+	struct blk_crypto_keyslot *keyslot;
+
+	if (!req->crypt_ctx)
+		return;
+
+	mrq->crypto_ctx = req->crypt_ctx;
+
+	keyslot = req->crypt_keyslot;
+	if (keyslot)
+		mrq->crypto_key_slot = blk_crypto_keyslot_index(keyslot);
+}
+EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);