1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MMC crypto engine (inline encryption) support
4 *
5 * Copyright 2020 Google LLC
6 */
7
8#include <linux/blk-crypto.h>
9#include <linux/mmc/host.h>
10
11#include "core.h"
12#include "crypto.h"
13#include "queue.h"
14
15void mmc_crypto_set_initial_state(struct mmc_host *host)
16{
17	/* Reset might clear all keys, so reprogram all the keys. */
18	if (host->caps2 & MMC_CAP2_CRYPTO)
19		blk_crypto_reprogram_all_keys(&host->crypto_profile);
20}
21
22void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host)
23{
24	if (host->caps2 & MMC_CAP2_CRYPTO)
25		blk_crypto_register(&host->crypto_profile, q);
26}
27EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
28
29void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq)
30{
31	struct request *req = mmc_queue_req_to_req(mqrq);
32	struct mmc_request *mrq = &mqrq->brq.mrq;
33	struct blk_crypto_keyslot *keyslot;
34
35	if (!req->crypt_ctx)
36		return;
37
38	mrq->crypto_ctx = req->crypt_ctx;
39
40	keyslot = req->crypt_keyslot;
41	if (keyslot)
42		mrq->crypto_key_slot = blk_crypto_keyslot_index(keyslot);
43}
44EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);
45