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In preparation for adding CQHCI crypto engine (inline encryption) support, add the code required to make mmc_core and mmc_block aware of inline encryption. Specifically: - Add a capability flag MMC_CAP2_CRYPTO to struct mmc_host. Drivers will set this if the host and driver support inline encryption. - Embed a blk_keyslot_manager in struct mmc_host. Drivers will initialize this (as a device-managed resource) if the host and driver support inline encryption. mmc_block registers this keyslot manager with the request_queue of any MMC card attached to the host. - Make mmc_block copy the crypto keyslot and crypto data unit number from struct request to struct mmc_request, so that drivers will have access to them. - If the MMC host is reset, reprogram all the keyslots to ensure that the software state stays in sync with the hardware state. Co-developed-by: Satya Tangirala <satyat@google.com> Signed-off-by: Satya Tangirala <satyat@google.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Satya Tangirala <satyat@google.com> Reviewed-and-tested-by: Peng Zhou <peng.zhou@mediatek.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20210126001456.382989-2-ebiggers@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
40 lines
820 B
C
40 lines
820 B
C
/* 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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#ifndef _MMC_CORE_CRYPTO_H
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#define _MMC_CORE_CRYPTO_H
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struct mmc_host;
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struct mmc_queue_req;
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struct request_queue;
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#ifdef CONFIG_MMC_CRYPTO
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void mmc_crypto_set_initial_state(struct mmc_host *host);
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void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host);
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void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq);
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#else /* CONFIG_MMC_CRYPTO */
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static inline void mmc_crypto_set_initial_state(struct mmc_host *host)
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{
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}
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static inline void mmc_crypto_setup_queue(struct request_queue *q,
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struct mmc_host *host)
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{
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}
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static inline void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq)
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{
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}
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#endif /* !CONFIG_MMC_CRYPTO */
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#endif /* _MMC_CORE_CRYPTO_H */
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