| 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 | |
| 15 | void 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(profile: &host->crypto_profile); |
| 20 | } |
| 21 | |
| 22 | void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host) |
| 23 | { |
| 24 | if (host->caps2 & MMC_CAP2_CRYPTO) |
| 25 | blk_crypto_register(profile: &host->crypto_profile, q); |
| 26 | } |
| 27 | EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue); |
| 28 | |
| 29 | void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq) |
| 30 | { |
| 31 | struct request *req = mmc_queue_req_to_req(mqr: 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(slot: keyslot); |
| 43 | } |
| 44 | EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req); |
| 45 |