49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2020 Google LLC
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*/
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#include <linux/blk-crypto.h>
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#include <linux/blkdev.h>
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#include <linux/keyslot-manager.h>
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#include <linux/mmc/host.h>
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#include "core.h"
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#include "queue.h"
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void mmc_crypto_setup_queue(struct mmc_host *host, struct request_queue *q)
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{
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if (host->caps2 & MMC_CAP2_CRYPTO)
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q->ksm = host->ksm;
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}
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EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
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void mmc_crypto_free_host(struct mmc_host *host)
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{
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keyslot_manager_destroy(host->ksm);
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}
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void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq)
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{
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struct request *req = mmc_queue_req_to_req(mqrq);
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struct mmc_request *mrq = &mqrq->brq.mrq;
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const struct bio_crypt_ctx *bc;
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if (!bio_crypt_should_process(req))
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return;
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bc = req->bio->bi_crypt_context;
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mrq->crypto_key_slot = bc->bc_keyslot;
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/*
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* OTA with ext4 (dun is 512 bytes) used LBA,
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* with F2FS (dun is 512 bytes), the dun[0] had
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* multiplied by 8.
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*/
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if (bc->hie_ext4 == true)
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mrq->data_unit_num = blk_rq_pos(req);
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else
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mrq->data_unit_num = lower_32_bits(bc->bc_dun[0]);
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mrq->crypto_key = bc->bc_key;
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}
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EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);
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