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 { 25 if (!mrq->crypto_enabled) 26 return 0; 27 28 return CQHCI_CRYPTO_ENABLE_BIT | 29 CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) | 30 mrq->data_unit_num; 31 } 32 33 #else /* CONFIG_MMC_CRYPTO */ 34 35 static inline int cqhci_crypto_init(struct cqhci_host *host) 36 { 37 return 0; 38 } 39 40 static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq) 41 { 42 return 0; 43 } 44 45 #endif /* !CONFIG_MMC_CRYPTO */ 46 47 #endif /* LINUX_MMC_CQHCI_CRYPTO_H */ 48