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);

 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_ksm_reprogram_all_keys(&host->ksm);
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_ksm_register(&host->ksm, 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
34	if (!req->crypt_keyslot)
35		return;
36
37	mrq->crypto_enabled = true;
38	mrq->crypto_key_slot = blk_ksm_get_slot_idx(req->crypt_keyslot);
39
40	/*
41	 * For now we assume that all MMC drivers set max_dun_bytes_supported=4,
42	 * which is the limit for CQHCI crypto.  So all DUNs should be 32-bit.
43	 */
44	WARN_ON_ONCE(req->crypt_ctx->bc_dun[0] > U32_MAX);
45
46	mrq->data_unit_num = req->crypt_ctx->bc_dun[0];
47}
48EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);