projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1e80709b EB |
1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* | |
| 3 | * CQHCI crypto engine (inline encryption) support | |
| 4 | * | |
| 5 | * Copyright 2020 Google LLC | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef LINUX_MMC_CQHCI_CRYPTO_H | |
| 9 | #define LINUX_MMC_CQHCI_CRYPTO_H | |
| 10 | ||
| 11 | #include <linux/mmc/host.h> | |
| 12 | ||
| 13 | #include "cqhci.h" | |
| 14 | ||
| 15 | #ifdef CONFIG_MMC_CRYPTO | |
| 16 | ||
| 17 | int cqhci_crypto_init(struct cqhci_host *host); | |
| 18 | ||
| 19 | /* | |
| 20 | * Returns the crypto bits that should be set in bits 64-127 of the | |
| 21 | * task descriptor. | |
| 22 | */ | |
| 23 | static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq) | |
| 24 | { | |
| 86c639ce | 25 | if (!mrq->crypto_ctx) |
| 1e80709b EB |
26 | return 0; |
| 27 | ||
| 86c639ce EB |
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 | ||
| 1e80709b EB |
31 | return CQHCI_CRYPTO_ENABLE_BIT | |
| 32 | CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) | | |
| 86c639ce | 33 | mrq->crypto_ctx->bc_dun[0]; |
| 1e80709b EB |
34 | } |
| 35 | ||
| 36 | #else /* CONFIG_MMC_CRYPTO */ | |
| 37 | ||
| 38 | static inline int cqhci_crypto_init(struct cqhci_host *host) | |
| 39 | { | |
| 40 | return 0; | |
| 41 | } | |
| 42 | ||
| 43 | static 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 */ |