tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
17int 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 */
23static 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
35static inline int cqhci_crypto_init(struct cqhci_host *host)
36{
37 return 0;
38}
39
40static 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 */