T Pratham <t-pratham@xxxxxx> writes:
> Add support for MD5 algorithm of the hashing engine of DTHE V2 crypto
> accelerator driver.
>
> Signed-off-by: T Pratham <t-pratham@xxxxxx>
> ---
> drivers/crypto/ti/Kconfig | 1 +
> drivers/crypto/ti/dthev2.c | 56 ++++++++++++++++++++++++++++++++++++++
> 2 files changed, 57 insertions(+)
>
> diff --git a/drivers/crypto/ti/Kconfig b/drivers/crypto/ti/Kconfig
> index 39d9d8cb6b78..ab4da73dffc4 100644
> --- a/drivers/crypto/ti/Kconfig
> +++ b/drivers/crypto/ti/Kconfig
> @@ -6,6 +6,7 @@ config CRYPTO_DEV_TI_DTHE_V2
> select CRYPTO_SKCIPHER
> select CRYPTO_SHA256
> select CRYPTO_SHA512
> + select CRYPTO_MD5
> help
> This enables support for the TI DTHE V2 hw crypto accelerator
> which can be found on TI K3 SOCs. Selecting this enables use
> diff --git a/drivers/crypto/ti/dthev2.c b/drivers/crypto/ti/dthev2.c
> index d5ed0f4621f5..ff2d5ef47c2a 100644
> --- a/drivers/crypto/ti/dthev2.c
> +++ b/drivers/crypto/ti/dthev2.c
> @@ -25,6 +25,7 @@
> #include <crypto/internal/aead.h>
> #include <crypto/internal/hash.h>
> #include <crypto/internal/skcipher.h>
> +#include <crypto/md5.h>
> #include <crypto/sha2.h>
>
> #include <linux/delay.h>
> @@ -363,6 +364,25 @@ static int dthe_sha224_cra_init(struct crypto_tfm *tfm)
> return 0;
> }
>
> +static int dthe_md5_cra_init(struct crypto_tfm *tfm)
> +{
> + struct dthe_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
> + struct dthe_data *dev_data = dthe_get_dev(ctx);
> +
> + if (!dev_data)
> + return -ENODEV;
> +
> + ctx->ctx_info.hash_ctx = kzalloc(sizeof(*ctx->ctx_info.hash_ctx), GFP_KERNEL);
> + if (!ctx->ctx_info.hash_ctx)
> + return -ENOMEM;
> +
> + ctx->ctx_info.hash_ctx->mode = DTHE_HASH_MD5;
> + ctx->ctx_info.hash_ctx->block_size = MD5_BLOCK_WORDS * 4;
Assign a meaningful macro
> + ctx->ctx_info.hash_ctx->digest_size = MD5_DIGEST_SIZE;
> + ctx->ctx_info.hash_ctx->phash_size = MD5_DIGEST_SIZE;
> + return 0;
> +}
> +
> static void dthe_hash_cra_exit(struct crypto_tfm *tfm)
> {
> struct dthe_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
> @@ -602,6 +622,8 @@ static int dthe_hash_update(struct ahash_request *req)
> memcpy(sctx->phash, sha256_zero_message_hash, sctx->digest_size);
> else if (sctx->mode == DTHE_HASH_SHA224)
> memcpy(sctx->phash, sha224_zero_message_hash, sctx->digest_size);
> + else if (sctx->mode == DTHE_HASH_MD5)
> + memcpy(sctx->phash, md5_zero_message_hash, sctx->digest_size);
> }
>
> return 0;
> @@ -736,6 +758,8 @@ static int dthe_hash_final(struct ahash_request *req)
> memcpy(req->result, sha256_zero_message_hash, sctx->digest_size);
> else if (sctx->mode == DTHE_HASH_SHA224)
> memcpy(req->result, sha224_zero_message_hash, sctx->digest_size);
> + else if (sctx->mode == DTHE_HASH_MD5)
> + memcpy(req->result, md5_zero_message_hash, sctx->digest_size);
> }
>
> memcpy(req->result, sctx->phash, sctx->digest_size);
> @@ -774,6 +798,8 @@ static int dthe_hash_finup(struct ahash_request *req)
> memcpy(req->result, sha256_zero_message_hash, sctx->digest_size);
> else if (sctx->mode == DTHE_HASH_SHA224)
> memcpy(req->result, sha224_zero_message_hash, sctx->digest_size);
> + else if (sctx->mode == DTHE_HASH_MD5)
> + memcpy(req->result, md5_zero_message_hash, sctx->digest_size);
> }
> return 0;
> }
> @@ -870,6 +896,8 @@ static int dthe_hash_digest(struct ahash_request *req)
> memcpy(req->result, sha256_zero_message_hash, sctx->digest_size);
> else if (sctx->mode == DTHE_HASH_SHA224)
> memcpy(req->result, sha224_zero_message_hash, sctx->digest_size);
> + else if (sctx->mode == DTHE_HASH_MD5)
> + memcpy(req->result, md5_zero_message_hash,
> sctx->digest_size);
Better to use Switch as it will give more readability and
mainitainability. As number of cases are 5 with this patch, both will
probably give same performance.
Kamlesh
> return 0;
> }
>
> @@ -1366,6 +1394,34 @@ static struct ahash_alg hash_algs[] = {
> }
> }
> },
> + {
> + .init = dthe_hash_init,
> + .update = dthe_hash_update,
> + .final = dthe_hash_final,
> + .finup = dthe_hash_finup,
> + .digest = dthe_hash_digest,
> + .export = dthe_hash_export,
> + .import = dthe_hash_import,
> + .halg = {
> + .digestsize = MD5_DIGEST_SIZE,
> + .statesize = sizeof(struct dthe_hash_ctx),
> + .base = {
> + .cra_name = "md5",
> + .cra_driver_name = "md5-dthe_v2",
> + .cra_priority = 400,
> + .cra_flags = CRYPTO_ALG_TYPE_AHASH |
> + CRYPTO_ALG_ASYNC |
> + CRYPTO_ALG_OPTIONAL_KEY |
> + CRYPTO_ALG_KERN_DRIVER_ONLY |
> + CRYPTO_ALG_ALLOCATES_MEMORY,
> + .cra_blocksize = MD5_BLOCK_WORDS * 4,
> + .cra_ctxsize = sizeof(struct dthe_tfm_ctx),
> + .cra_module = THIS_MODULE,
> + .cra_init = dthe_md5_cra_init,
> + .cra_exit = dthe_hash_cra_exit,
> + }
> + }
> + },
> };
>
> static struct skcipher_alg cipher_algs[] = {
> --
> 2.34.1
