linux-imx

// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)

/*

 * caam - Freescale FSL CAAM support for Public Key Cryptography

 *

 * Copyright 2016 Freescale Semiconductor, Inc.

 * Copyright 2018 NXP

 *

 * There is no Shared Descriptor for PKC so that the Job Descriptor must carry

 * all the desired key parameters, input and output pointers.

 */

#include "compat.h"

#include "regs.h"

#include "intern.h"

#include "jr.h"

#include "error.h"

#include "desc_constr.h"

#include "sg_sw_sec4.h"

#include "caampkc.h"

​

#define DESC_RSA_PUB_LEN    (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb))

#define DESC_RSA_PRIV_F1_LEN    (2 * CAAM_CMD_SZ + \

                 sizeof(struct rsa_priv_f1_pdb))

#define DESC_RSA_PRIV_F2_LEN    (2 * CAAM_CMD_SZ + \

                 sizeof(struct rsa_priv_f2_pdb))

#define DESC_RSA_PRIV_F3_LEN    (2 * CAAM_CMD_SZ + \

                 sizeof(struct rsa_priv_f3_pdb))

​

static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc,

             struct akcipher_request *req)

{

    dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE);

    dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE);

​

    if (edesc->sec4_sg_bytes)

        dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes,

                 DMA_TO_DEVICE);

}

​

static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc,

              struct akcipher_request *req)

{

    struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);

    struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);

    struct caam_rsa_key *key = &ctx->key;

    struct rsa_pub_pdb *pdb = &edesc->pdb.pub;

​

    dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);

    dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE);

}

​

static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc,

                  struct akcipher_request *req)

{

    struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);

    struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);

    struct caam_rsa_key *key = &ctx->key;

    struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1;

​

    dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);

    dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);

}

​

static void rsa_priv_f2_unmap(struct device *dev, struct rsa_edesc *edesc,