LXR linux/drivers/mmc/core/crypto.c

   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
  15void 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
  22void 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}
  27EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
  28
  29void 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}
  41EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req);
  42