1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * MMC crypto engine (inline encryption) support 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright 2020 Google LLC 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <linux/blk-crypto.h> 9*4882a593Smuzhiyun #include <linux/mmc/host.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include "core.h" 12*4882a593Smuzhiyun #include "crypto.h" 13*4882a593Smuzhiyun #include "queue.h" 14*4882a593Smuzhiyun mmc_crypto_set_initial_state(struct mmc_host * host)15*4882a593Smuzhiyunvoid mmc_crypto_set_initial_state(struct mmc_host *host) 16*4882a593Smuzhiyun { 17*4882a593Smuzhiyun /* Reset might clear all keys, so reprogram all the keys. */ 18*4882a593Smuzhiyun if (host->caps2 & MMC_CAP2_CRYPTO) 19*4882a593Smuzhiyun blk_ksm_reprogram_all_keys(&host->ksm); 20*4882a593Smuzhiyun } 21*4882a593Smuzhiyun mmc_crypto_setup_queue(struct request_queue * q,struct mmc_host * host)22*4882a593Smuzhiyunvoid mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host) 23*4882a593Smuzhiyun { 24*4882a593Smuzhiyun if (host->caps2 & MMC_CAP2_CRYPTO) 25*4882a593Smuzhiyun blk_ksm_register(&host->ksm, q); 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue); 28*4882a593Smuzhiyun mmc_crypto_prepare_req(struct mmc_queue_req * mqrq)29*4882a593Smuzhiyunvoid mmc_crypto_prepare_req(struct mmc_queue_req *mqrq) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun struct request *req = mmc_queue_req_to_req(mqrq); 32*4882a593Smuzhiyun struct mmc_request *mrq = &mqrq->brq.mrq; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun if (!req->crypt_ctx) 35*4882a593Smuzhiyun return; 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun mrq->crypto_ctx = req->crypt_ctx; 38*4882a593Smuzhiyun if (req->crypt_keyslot) 39*4882a593Smuzhiyun mrq->crypto_key_slot = blk_ksm_get_slot_idx(req->crypt_keyslot); 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req); 42