add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mmc/core/crypto.c
..
..
@@ -1,40 +1,41 @@
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-// SPDX-License-Identifier: GPL-2.0
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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+ * MMC crypto engine (inline encryption) support
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+ *
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  * Copyright 2020 Google LLC
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  */
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 #include <linux/blk-crypto.h>
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-#include <linux/blkdev.h>
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-#include <linux/keyslot-manager.h>
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 #include <linux/mmc/host.h>
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 #include "core.h"
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+#include "crypto.h"
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 #include "queue.h"
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-void mmc_crypto_setup_queue(struct mmc_host *host, struct request_queue *q)
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+void mmc_crypto_set_initial_state(struct mmc_host *host)
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+{
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+	/* Reset might clear all keys, so reprogram all the keys. */
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+	if (host->caps2 & MMC_CAP2_CRYPTO)
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+		blk_ksm_reprogram_all_keys(&host->ksm);
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+}
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+
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+void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host)
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 {
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 	if (host->caps2 & MMC_CAP2_CRYPTO)
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-		q->ksm = host->ksm;
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+		blk_ksm_register(&host->ksm, q);
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 }
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 EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
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-
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-void mmc_crypto_free_host(struct mmc_host *host)
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-{
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-	keyslot_manager_destroy(host->ksm);
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-}
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 void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq)
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 {
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 	struct request *req = mmc_queue_req_to_req(mqrq);
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 	struct mmc_request *mrq = &mqrq->brq.mrq;
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-	const struct bio_crypt_ctx *bc;
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-	if (!bio_crypt_should_process(req))
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+	if (!req->crypt_ctx)
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 		return;
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-	bc = req->bio->bi_crypt_context;
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-	mrq->crypto_key_slot = bc->bc_keyslot;
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-	mrq->data_unit_num = bc->bc_dun[0];
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-	mrq->crypto_key = bc->bc_key;
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+	mrq->crypto_ctx = req->crypt_ctx;
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+	if (req->crypt_keyslot)
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+		mrq->crypto_key_slot = blk_ksm_get_slot_idx(req->crypt_keyslot);
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 }
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 EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);