| /* 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 */ |
