Copy Marek who is the author of the driver.
Shawn
On Mon, Oct 14, 2019 at 02:19:01PM +0200, Ard Biesheuvel wrote:
> Commit 7a7ffe65c8c5 ("crypto: skcipher - Add top-level skcipher interface")
> dated 20 august 2015 introduced the new skcipher API which is supposed to
> replace both blkcipher and ablkcipher. While all consumers of the API have
> been converted long ago, some producers of the ablkcipher remain, forcing
> us to keep the ablkcipher support routines alive, along with the matching
> code to expose [a]blkciphers via the skcipher API.
>
> So switch this driver to the skcipher API, allowing us to finally drop the
> blkcipher code in the near future.
>
> Cc: Shawn Guo <shawn...@kernel.org>
> Cc: Sascha Hauer <s.ha...@pengutronix.de>
> Cc: Pengutronix Kernel Team <ker...@pengutronix.de>
> Cc: Fabio Estevam <feste...@gmail.com>
> Cc: NXP Linux Team <linux-...@nxp.com>
> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
> ---
> drivers/crypto/mxs-dcp.c | 140 +++++++++-----------
> 1 file changed, 65 insertions(+), 75 deletions(-)
>
> diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c
> index bf8d2197bc11..f438b425c655 100644
> --- a/drivers/crypto/mxs-dcp.c
> +++ b/drivers/crypto/mxs-dcp.c
> @@ -211,11 +211,11 @@ static int mxs_dcp_start_dma(struct dcp_async_ctx *actx)
> * Encryption (AES128)
> */
> static int mxs_dcp_run_aes(struct dcp_async_ctx *actx,
> - struct ablkcipher_request *req, int init)
> + struct skcipher_request *req, int init)
> {
> struct dcp *sdcp = global_sdcp;
> struct dcp_dma_desc *desc = &sdcp->coh->desc[actx->chan];
> - struct dcp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
> + struct dcp_aes_req_ctx *rctx = skcipher_request_ctx(req);
> int ret;
>
> dma_addr_t key_phys = dma_map_single(sdcp->dev, sdcp->coh->aes_key,
> @@ -274,9 +274,9 @@ static int mxs_dcp_aes_block_crypt(struct
> crypto_async_request *arq)
> {
> struct dcp *sdcp = global_sdcp;
>
> - struct ablkcipher_request *req = ablkcipher_request_cast(arq);
> + struct skcipher_request *req = skcipher_request_cast(arq);
> struct dcp_async_ctx *actx = crypto_tfm_ctx(arq->tfm);
> - struct dcp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
> + struct dcp_aes_req_ctx *rctx = skcipher_request_ctx(req);
>
> struct scatterlist *dst = req->dst;
> struct scatterlist *src = req->src;
> @@ -305,7 +305,7 @@ static int mxs_dcp_aes_block_crypt(struct
> crypto_async_request *arq)
>
> if (!rctx->ecb) {
> /* Copy the CBC IV just past the key. */
> - memcpy(key + AES_KEYSIZE_128, req->info, AES_KEYSIZE_128);
> + memcpy(key + AES_KEYSIZE_128, req->iv, AES_KEYSIZE_128);
> /* CBC needs the INIT set. */
> init = 1;
> } else {
> @@ -316,10 +316,10 @@ static int mxs_dcp_aes_block_crypt(struct
> crypto_async_request *arq)
> src_buf = sg_virt(src);
> len = sg_dma_len(src);
> tlen += len;
> - limit_hit = tlen > req->nbytes;
> + limit_hit = tlen > req->cryptlen;
>
> if (limit_hit)
> - len = req->nbytes - (tlen - len);
> + len = req->cryptlen - (tlen - len);
>
> do {
> if (actx->fill + len > out_off)
> @@ -375,10 +375,10 @@ static int mxs_dcp_aes_block_crypt(struct
> crypto_async_request *arq)
> /* Copy the IV for CBC for chaining */
> if (!rctx->ecb) {
> if (rctx->enc)
> - memcpy(req->info, out_buf+(last_out_len-AES_BLOCK_SIZE),
> + memcpy(req->iv, out_buf+(last_out_len-AES_BLOCK_SIZE),
> AES_BLOCK_SIZE);
> else
> - memcpy(req->info, in_buf+(last_out_len-AES_BLOCK_SIZE),
> + memcpy(req->iv, in_buf+(last_out_len-AES_BLOCK_SIZE),
> AES_BLOCK_SIZE);
> }
>
> @@ -422,17 +422,17 @@ static int dcp_chan_thread_aes(void *data)
> return 0;
> }
>
> -static int mxs_dcp_block_fallback(struct ablkcipher_request *req, int enc)
> +static int mxs_dcp_block_fallback(struct skcipher_request *req, int enc)
> {
> - struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
> - struct dcp_async_ctx *ctx = crypto_ablkcipher_ctx(tfm);
> + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
> + struct dcp_async_ctx *ctx = crypto_skcipher_ctx(tfm);
> SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
> int ret;
>
> skcipher_request_set_sync_tfm(subreq, ctx->fallback);
> skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL);
> skcipher_request_set_crypt(subreq, req->src, req->dst,
> - req->nbytes, req->info);
> + req->cryptlen, req->iv);
>
> if (enc)
> ret = crypto_skcipher_encrypt(subreq);
> @@ -444,12 +444,12 @@ static int mxs_dcp_block_fallback(struct
> ablkcipher_request *req, int enc)
> return ret;
> }
>
> -static int mxs_dcp_aes_enqueue(struct ablkcipher_request *req, int enc, int
> ecb)
> +static int mxs_dcp_aes_enqueue(struct skcipher_request *req, int enc, int
> ecb)
> {
> struct dcp *sdcp = global_sdcp;
> struct crypto_async_request *arq = &req->base;
> struct dcp_async_ctx *actx = crypto_tfm_ctx(arq->tfm);
> - struct dcp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
> + struct dcp_aes_req_ctx *rctx = skcipher_request_ctx(req);
> int ret;
>
> if (unlikely(actx->key_len != AES_KEYSIZE_128))
> @@ -468,30 +468,30 @@ static int mxs_dcp_aes_enqueue(struct
> ablkcipher_request *req, int enc, int ecb)
> return ret;
> }
>
> -static int mxs_dcp_aes_ecb_decrypt(struct ablkcipher_request *req)
> +static int mxs_dcp_aes_ecb_decrypt(struct skcipher_request *req)
> {
> return mxs_dcp_aes_enqueue(req, 0, 1);
> }
>
> -static int mxs_dcp_aes_ecb_encrypt(struct ablkcipher_request *req)
> +static int mxs_dcp_aes_ecb_encrypt(struct skcipher_request *req)
> {
> return mxs_dcp_aes_enqueue(req, 1, 1);
> }
>
> -static int mxs_dcp_aes_cbc_decrypt(struct ablkcipher_request *req)
> +static int mxs_dcp_aes_cbc_decrypt(struct skcipher_request *req)
> {
> return mxs_dcp_aes_enqueue(req, 0, 0);
> }
>
> -static int mxs_dcp_aes_cbc_encrypt(struct ablkcipher_request *req)
> +static int mxs_dcp_aes_cbc_encrypt(struct skcipher_request *req)
> {
> return mxs_dcp_aes_enqueue(req, 1, 0);
> }
>
> -static int mxs_dcp_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
> +static int mxs_dcp_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
> unsigned int len)
> {
> - struct dcp_async_ctx *actx = crypto_ablkcipher_ctx(tfm);
> + struct dcp_async_ctx *actx = crypto_skcipher_ctx(tfm);
> unsigned int ret;
>
> /*
> @@ -525,10 +525,10 @@ static int mxs_dcp_aes_setkey(struct crypto_ablkcipher
> *tfm, const u8 *key,
> return ret;
> }
>
> -static int mxs_dcp_aes_fallback_init(struct crypto_tfm *tfm)
> +static int mxs_dcp_aes_fallback_init_tfm(struct crypto_skcipher *tfm)
> {
> - const char *name = crypto_tfm_alg_name(tfm);
> - struct dcp_async_ctx *actx = crypto_tfm_ctx(tfm);
> + const char *name = crypto_tfm_alg_name(crypto_skcipher_tfm(tfm));
> + struct dcp_async_ctx *actx = crypto_skcipher_ctx(tfm);
> struct crypto_sync_skcipher *blk;
>
> blk = crypto_alloc_sync_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
> @@ -536,13 +536,13 @@ static int mxs_dcp_aes_fallback_init(struct crypto_tfm
> *tfm)
> return PTR_ERR(blk);
>
> actx->fallback = blk;
> - tfm->crt_ablkcipher.reqsize = sizeof(struct dcp_aes_req_ctx);
> + crypto_skcipher_set_reqsize(tfm, sizeof(struct dcp_aes_req_ctx));
> return 0;
> }
>
> -static void mxs_dcp_aes_fallback_exit(struct crypto_tfm *tfm)
> +static void mxs_dcp_aes_fallback_exit_tfm(struct crypto_skcipher *tfm)
> {
> - struct dcp_async_ctx *actx = crypto_tfm_ctx(tfm);
> + struct dcp_async_ctx *actx = crypto_skcipher_ctx(tfm);
>
> crypto_free_sync_skcipher(actx->fallback);
> }
> @@ -854,54 +854,44 @@ static void dcp_sha_cra_exit(struct crypto_tfm *tfm)
> }
>
> /* AES 128 ECB and AES 128 CBC */
> -static struct crypto_alg dcp_aes_algs[] = {
> +static struct skcipher_alg dcp_aes_algs[] = {
> {
> - .cra_name = "ecb(aes)",
> - .cra_driver_name = "ecb-aes-dcp",
> - .cra_priority = 400,
> - .cra_alignmask = 15,
> - .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
> - CRYPTO_ALG_ASYNC |
> + .base.cra_name = "ecb(aes)",
> + .base.cra_driver_name = "ecb-aes-dcp",
> + .base.cra_priority = 400,
> + .base.cra_alignmask = 15,
> + .base.cra_flags = CRYPTO_ALG_ASYNC |
> CRYPTO_ALG_NEED_FALLBACK,
> - .cra_init = mxs_dcp_aes_fallback_init,
> - .cra_exit = mxs_dcp_aes_fallback_exit,
> - .cra_blocksize = AES_BLOCK_SIZE,
> - .cra_ctxsize = sizeof(struct dcp_async_ctx),
> - .cra_type = &crypto_ablkcipher_type,
> - .cra_module = THIS_MODULE,
> - .cra_u = {
> - .ablkcipher = {
> - .min_keysize = AES_MIN_KEY_SIZE,
> - .max_keysize = AES_MAX_KEY_SIZE,
> - .setkey = mxs_dcp_aes_setkey,
> - .encrypt = mxs_dcp_aes_ecb_encrypt,
> - .decrypt = mxs_dcp_aes_ecb_decrypt
> - },
> - },
> + .base.cra_blocksize = AES_BLOCK_SIZE,
> + .base.cra_ctxsize = sizeof(struct dcp_async_ctx),
> + .base.cra_module = THIS_MODULE,
> +
> + .min_keysize = AES_MIN_KEY_SIZE,
> + .max_keysize = AES_MAX_KEY_SIZE,
> + .setkey = mxs_dcp_aes_setkey,
> + .encrypt = mxs_dcp_aes_ecb_encrypt,
> + .decrypt = mxs_dcp_aes_ecb_decrypt,
> + .init = mxs_dcp_aes_fallback_init_tfm,
> + .exit = mxs_dcp_aes_fallback_exit_tfm,
> }, {
> - .cra_name = "cbc(aes)",
> - .cra_driver_name = "cbc-aes-dcp",
> - .cra_priority = 400,
> - .cra_alignmask = 15,
> - .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
> - CRYPTO_ALG_ASYNC |
> + .base.cra_name = "cbc(aes)",
> + .base.cra_driver_name = "cbc-aes-dcp",
> + .base.cra_priority = 400,
> + .base.cra_alignmask = 15,
> + .base.cra_flags = CRYPTO_ALG_ASYNC |
> CRYPTO_ALG_NEED_FALLBACK,
> - .cra_init = mxs_dcp_aes_fallback_init,
> - .cra_exit = mxs_dcp_aes_fallback_exit,
> - .cra_blocksize = AES_BLOCK_SIZE,
> - .cra_ctxsize = sizeof(struct dcp_async_ctx),
> - .cra_type = &crypto_ablkcipher_type,
> - .cra_module = THIS_MODULE,
> - .cra_u = {
> - .ablkcipher = {
> - .min_keysize = AES_MIN_KEY_SIZE,
> - .max_keysize = AES_MAX_KEY_SIZE,
> - .setkey = mxs_dcp_aes_setkey,
> - .encrypt = mxs_dcp_aes_cbc_encrypt,
> - .decrypt = mxs_dcp_aes_cbc_decrypt,
> - .ivsize = AES_BLOCK_SIZE,
> - },
> - },
> + .base.cra_blocksize = AES_BLOCK_SIZE,
> + .base.cra_ctxsize = sizeof(struct dcp_async_ctx),
> + .base.cra_module = THIS_MODULE,
> +
> + .min_keysize = AES_MIN_KEY_SIZE,
> + .max_keysize = AES_MAX_KEY_SIZE,
> + .setkey = mxs_dcp_aes_setkey,
> + .encrypt = mxs_dcp_aes_cbc_encrypt,
> + .decrypt = mxs_dcp_aes_cbc_decrypt,
> + .ivsize = AES_BLOCK_SIZE,
> + .init = mxs_dcp_aes_fallback_init_tfm,
> + .exit = mxs_dcp_aes_fallback_exit_tfm,
> },
> };
>
> @@ -1104,8 +1094,8 @@ static int mxs_dcp_probe(struct platform_device *pdev)
> sdcp->caps = readl(sdcp->base + MXS_DCP_CAPABILITY1);
>
> if (sdcp->caps & MXS_DCP_CAPABILITY1_AES128) {
> - ret = crypto_register_algs(dcp_aes_algs,
> - ARRAY_SIZE(dcp_aes_algs));
> + ret = crypto_register_skciphers(dcp_aes_algs,
> + ARRAY_SIZE(dcp_aes_algs));
> if (ret) {
> /* Failed to register algorithm. */
> dev_err(dev, "Failed to register AES crypto!\n");
> @@ -1139,7 +1129,7 @@ static int mxs_dcp_probe(struct platform_device *pdev)
>
> err_unregister_aes:
> if (sdcp->caps & MXS_DCP_CAPABILITY1_AES128)
> - crypto_unregister_algs(dcp_aes_algs, ARRAY_SIZE(dcp_aes_algs));
> + crypto_unregister_skciphers(dcp_aes_algs,
> ARRAY_SIZE(dcp_aes_algs));
>
> err_destroy_aes_thread:
> kthread_stop(sdcp->thread[DCP_CHAN_CRYPTO]);
> @@ -1164,7 +1154,7 @@ static int mxs_dcp_remove(struct platform_device *pdev)
> crypto_unregister_ahash(&dcp_sha1_alg);
>
> if (sdcp->caps & MXS_DCP_CAPABILITY1_AES128)
> - crypto_unregister_algs(dcp_aes_algs, ARRAY_SIZE(dcp_aes_algs));
> + crypto_unregister_skciphers(dcp_aes_algs,
> ARRAY_SIZE(dcp_aes_algs));
>
> kthread_stop(sdcp->thread[DCP_CHAN_HASH_SHA]);
> kthread_stop(sdcp->thread[DCP_CHAN_CRYPTO]);
> --
> 2.20.1
>
