eb54e73236
Make mmc core able to use the blk-crypto framework for inline encryption. This patch introduces a pointer to struct keyslot_manager to struct mmc_host, and handles setting up the request_queue for devices using that keyslot_manager appropriately. It also inits struct mmc_request's inline encryption fields before it's passed to mmc_host::ops->request. Users of the core code in host/ (e.g. cqhci.c) should initialize the keyslot_manager in struct mmc_host appropriately, if they want to support inline encryption. They should also handle any inline encryption related work necessary when mmc_host::ops->request is called. This patch is only compile tested, as I don't have a device to actually test these patches. Enable CONFIG_MMC_CRYPTO to test Bug: 153512828 Bug: 144046242 Change-Id: I6f98ffadfa6e39d7fdc3752b069210ad97babd8b Co-developed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Satya Tangirala <satyat@google.com>
41 lines
925 B
C
41 lines
925 B
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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mrq->data_unit_num = 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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