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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * CQHCI crypto engine (inline encryption) support4 *5 * Copyright 2020 Google LLC6 */7 8#ifndef LINUX_MMC_CQHCI_CRYPTO_H9#define LINUX_MMC_CQHCI_CRYPTO_H10 11#include <linux/mmc/host.h>12 13#include "cqhci.h"14 15#ifdef CONFIG_MMC_CRYPTO16 17int cqhci_crypto_init(struct cqhci_host *host);18 19/*20 * Returns the crypto bits that should be set in bits 64-127 of the21 * task descriptor.22 */23static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)24{25 if (!mrq->crypto_ctx)26 return 0;27 28 /* We set max_dun_bytes_supported=4, so all DUNs should be 32-bit. */29 WARN_ON_ONCE(mrq->crypto_ctx->bc_dun[0] > U32_MAX);30 31 return CQHCI_CRYPTO_ENABLE_BIT |32 CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) |33 mrq->crypto_ctx->bc_dun[0];34}35 36#else /* CONFIG_MMC_CRYPTO */37 38static inline int cqhci_crypto_init(struct cqhci_host *host)39{40 return 0;41}42 43static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)44{45 return 0;46}47 48#endif /* !CONFIG_MMC_CRYPTO */49 50#endif /* LINUX_MMC_CQHCI_CRYPTO_H */51