/* SPDX-License-Identifier: GPL-2.0-only */ /* * CQHCI crypto engine (inline encryption) support * * Copyright 2020 Google LLC */ #ifndef LINUX_MMC_CQHCI_CRYPTO_H #define LINUX_MMC_CQHCI_CRYPTO_H #include <linux/mmc/host.h> #include "cqhci.h" #ifdef CONFIG_MMC_CRYPTO int cqhci_crypto_init(struct cqhci_host *host); /* * Returns the crypto bits that should be set in bits 64-127 of the * task descriptor. */ static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq) { if (!mrq->crypto_ctx) return 0; /* We set max_dun_bytes_supported=4, so all DUNs should be 32-bit. */ WARN_ON_ONCE(mrq->crypto_ctx->bc_dun[0] > U32_MAX); return CQHCI_CRYPTO_ENABLE_BIT | CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) | mrq->crypto_ctx->bc_dun[0]; } #else /* CONFIG_MMC_CRYPTO */ static inline int cqhci_crypto_init(struct cqhci_host *host) { return 0; } static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq) { return 0; } #endif /* !CONFIG_MMC_CRYPTO */ #endif /* LINUX_MMC_CQHCI_CRYPTO_H */