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_ksm_reprogram_all_keys(&host->ksm); 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_ksm_register(&host->ksm, 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(mqrq); 32 struct mmc_request *mrq = &mqrq->brq.mrq; 33 34 if (!req->crypt_ctx) 35 return; 36 37 mrq->crypto_ctx = req->crypt_ctx; 38 if (req->crypt_keyslot) 39 mrq->crypto_key_slot = blk_ksm_get_slot_idx(req->crypt_keyslot); 40 } 41 EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req); 42