crypto: cavium/nitrox - Added AEAD cipher support

Added support to offload AEAD ciphers to NITROX. Currently supported
AEAD cipher is 'gcm(aes)'.

Signed-off-by: Nagadheeraj Rottela <rnagadheeraj@marvell.com>
Reviewed-by: Srikanth Jampala <jsrikanth@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 11 insertions, 548 deletions

diff --git a/drivers/crypto/cavium/nitrox/nitrox_algs.c b/drivers/crypto/cavium/nitrox/nitrox_algs.c
index 10075a97ff0d..d646ae5f29b0 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_algs.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_algs.c
@@ -1,561 +1,24 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/crypto.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-
-#include <crypto/aes.h>
-#include <crypto/skcipher.h>
-#include <crypto/ctr.h>
-#include <crypto/des.h>
-#include <crypto/xts.h>
-
-#include "nitrox_dev.h"
 #include "nitrox_common.h"
-#include "nitrox_req.h"
-
-#define PRIO 4001
-
-struct nitrox_cipher {
-	const char *name;
-	enum flexi_cipher value;
-};
-
-/**
- * supported cipher list
- */
-static const struct nitrox_cipher flexi_cipher_table[] = {
-	{ "null",		CIPHER_NULL },
-	{ "cbc(des3_ede)",	CIPHER_3DES_CBC },
-	{ "ecb(des3_ede)",	CIPHER_3DES_ECB },
-	{ "cbc(aes)",		CIPHER_AES_CBC },
-	{ "ecb(aes)",		CIPHER_AES_ECB },
-	{ "cfb(aes)",		CIPHER_AES_CFB },
-	{ "rfc3686(ctr(aes))",	CIPHER_AES_CTR },
-	{ "xts(aes)",		CIPHER_AES_XTS },
-	{ "cts(cbc(aes))",	CIPHER_AES_CBC_CTS },
-	{ NULL,			CIPHER_INVALID }
-};
-
-static enum flexi_cipher flexi_cipher_type(const char *name)
-{
-	const struct nitrox_cipher *cipher = flexi_cipher_table;
-
-	while (cipher->name) {
-		if (!strcmp(cipher->name, name))
-			break;
-		cipher++;
-	}
-	return cipher->value;
-}
-
-static int flexi_aes_keylen(int keylen)
-{
-	int aes_keylen;
-
-	switch (keylen) {
-	case AES_KEYSIZE_128:
-		aes_keylen = 1;
-		break;
-	case AES_KEYSIZE_192:
-		aes_keylen = 2;
-		break;
-	case AES_KEYSIZE_256:
-		aes_keylen = 3;
-		break;
-	default:
-		aes_keylen = -EINVAL;
-		break;
-	}
-	return aes_keylen;
-}
-
-static int nitrox_skcipher_init(struct crypto_skcipher *tfm)
-{
-	struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(tfm);
-	struct crypto_ctx_hdr *chdr;
-
-	/* get the first device */
-	nctx->ndev = nitrox_get_first_device();
-	if (!nctx->ndev)
-		return -ENODEV;
-
-	/* allocate nitrox crypto context */
-	chdr = crypto_alloc_context(nctx->ndev);
-	if (!chdr) {
-		nitrox_put_device(nctx->ndev);
-		return -ENOMEM;
-	}
-	nctx->chdr = chdr;
-	nctx->u.ctx_handle = (uintptr_t)((u8 *)chdr->vaddr +
-					 sizeof(struct ctx_hdr));
-	crypto_skcipher_set_reqsize(tfm, crypto_skcipher_reqsize(tfm) +
-				    sizeof(struct nitrox_kcrypt_request));
-	return 0;
-}
-
-static void nitrox_skcipher_exit(struct crypto_skcipher *tfm)
-{
-	struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(tfm);
-
-	/* free the nitrox crypto context */
-	if (nctx->u.ctx_handle) {
-		struct flexi_crypto_context *fctx = nctx->u.fctx;
-
-		memset(&fctx->crypto, 0, sizeof(struct crypto_keys));
-		memset(&fctx->auth, 0, sizeof(struct auth_keys));
-		crypto_free_context((void *)nctx->chdr);
-	}
-	nitrox_put_device(nctx->ndev);
-
-	nctx->u.ctx_handle = 0;
-	nctx->ndev = NULL;
-}
-
-static inline int nitrox_skcipher_setkey(struct crypto_skcipher *cipher,
-					 int aes_keylen, const u8 *key,
-					 unsigned int keylen)
-{
-	struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
-	struct nitrox_crypto_ctx *nctx = crypto_tfm_ctx(tfm);
-	struct flexi_crypto_context *fctx;
-	enum flexi_cipher cipher_type;
-	const char *name;
-
-	name = crypto_tfm_alg_name(tfm);
-	cipher_type = flexi_cipher_type(name);
-	if (unlikely(cipher_type == CIPHER_INVALID)) {
-		pr_err("unsupported cipher: %s\n", name);
-		return -EINVAL;
-	}
-
-	/* fill crypto context */
-	fctx = nctx->u.fctx;
-	fctx->flags = 0;
-	fctx->w0.cipher_type = cipher_type;
-	fctx->w0.aes_keylen = aes_keylen;
-	fctx->w0.iv_source = IV_FROM_DPTR;
-	fctx->flags = cpu_to_be64(*(u64 *)&fctx->w0);
-	/* copy the key to context */
-	memcpy(fctx->crypto.u.key, key, keylen);
-
-	return 0;
-}
-
-static int nitrox_aes_setkey(struct crypto_skcipher *cipher, const u8 *key,
-			     unsigned int keylen)
-{
-	int aes_keylen;
-
-	aes_keylen = flexi_aes_keylen(keylen);
-	if (aes_keylen < 0) {
-		crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-	return nitrox_skcipher_setkey(cipher, aes_keylen, key, keylen);
-}
-
-static int alloc_src_sglist(struct skcipher_request *skreq, int ivsize)
-{
-	struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
-	int nents = sg_nents(skreq->src) + 1;
-	struct se_crypto_request *creq = &nkreq->creq;
-	char *iv;
-	struct scatterlist *sg;
-
-	/* Allocate buffer to hold IV and input scatterlist array */
-	nkreq->src = alloc_req_buf(nents, ivsize, creq->gfp);
-	if (!nkreq->src)
-		return -ENOMEM;
-
-	/* copy iv */
-	iv = nkreq->src;
-	memcpy(iv, skreq->iv, ivsize);
-
-	sg = (struct scatterlist *)(iv + ivsize);
-	creq->src = sg;
-	sg_init_table(sg, nents);
-
-	/* Input format:
-	 * +----+----------------+
-	 * | IV | SRC sg entries |
-	 * +----+----------------+
-	 */
-
-	/* IV */
-	sg = create_single_sg(sg, iv, ivsize);
-	/* SRC entries */
-	create_multi_sg(sg, skreq->src);
-
-	return 0;
-}
-
-static int alloc_dst_sglist(struct skcipher_request *skreq, int ivsize)
-{
-	struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
-	int nents = sg_nents(skreq->dst) + 3;
-	int extralen = ORH_HLEN + COMP_HLEN;
-	struct se_crypto_request *creq = &nkreq->creq;
-	struct scatterlist *sg;
-	char *iv = nkreq->src;
-
-	/* Allocate buffer to hold ORH, COMPLETION and output scatterlist
-	 * array
-	 */
-	nkreq->dst = alloc_req_buf(nents, extralen, creq->gfp);
-	if (!nkreq->dst)
-		return -ENOMEM;
-
-	creq->orh = (u64 *)(nkreq->dst);
-	set_orh_value(creq->orh);
-
-	creq->comp = (u64 *)(nkreq->dst + ORH_HLEN);
-	set_comp_value(creq->comp);
-
-	sg = (struct scatterlist *)(nkreq->dst + ORH_HLEN + COMP_HLEN);
-	creq->dst = sg;
-	sg_init_table(sg, nents);
-
-	/* Output format:
-	 * +-----+----+----------------+-----------------+
-	 * | ORH | IV | DST sg entries | COMPLETION Bytes|
-	 * +-----+----+----------------+-----------------+
-	 */
-
-	/* ORH */
-	sg = create_single_sg(sg, creq->orh, ORH_HLEN);
-	/* IV */
-	sg = create_single_sg(sg, iv, ivsize);
-	/* DST entries */
-	sg = create_multi_sg(sg, skreq->dst);
-	/* COMPLETION Bytes */
-	create_single_sg(sg, creq->comp, COMP_HLEN);
-
-	return 0;
-}
-
-static void free_src_sglist(struct skcipher_request *skreq)
-{
-	struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
-
-	kfree(nkreq->src);
-}
 
-static void free_dst_sglist(struct skcipher_request *skreq)
+int nitrox_crypto_register(void)
 {
-	struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
+	int err;
 
-	kfree(nkreq->dst);
-}
+	err = nitrox_register_skciphers();
+	if (err)
+		return err;
 
-static void nitrox_skcipher_callback(struct skcipher_request *skreq,
-				     int err)
-{
-	free_src_sglist(skreq);
-	free_dst_sglist(skreq);
+	err = nitrox_register_aeads();
 	if (err) {
-		pr_err_ratelimited("request failed status 0x%0x\n", err);
-		err = -EINVAL;
-	}
-
-	skcipher_request_complete(skreq, err);
-}
-
-static int nitrox_skcipher_crypt(struct skcipher_request *skreq, bool enc)
-{
-	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(skreq);
-	struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(cipher);
-	struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
-	int ivsize = crypto_skcipher_ivsize(cipher);
-	struct se_crypto_request *creq;
-	int ret;
-
-	creq = &nkreq->creq;
-	creq->flags = skreq->base.flags;
-	creq->gfp = (skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
-		     GFP_KERNEL : GFP_ATOMIC;
-
-	/* fill the request */
-	creq->ctrl.value = 0;
-	creq->opcode = FLEXI_CRYPTO_ENCRYPT_HMAC;
-	creq->ctrl.s.arg = (enc ? ENCRYPT : DECRYPT);
-	/* param0: length of the data to be encrypted */
-	creq->gph.param0 = cpu_to_be16(skreq->cryptlen);
-	creq->gph.param1 = 0;
-	/* param2: encryption data offset */
-	creq->gph.param2 = cpu_to_be16(ivsize);
-	creq->gph.param3 = 0;
-
-	creq->ctx_handle = nctx->u.ctx_handle;
-	creq->ctrl.s.ctxl = sizeof(struct flexi_crypto_context);
-
-	ret = alloc_src_sglist(skreq, ivsize);
-	if (ret)
-		return ret;
-
-	ret = alloc_dst_sglist(skreq, ivsize);
-	if (ret) {
-		free_src_sglist(skreq);
-		return ret;
-	}
-
-	nkreq->nctx = nctx;
-	nkreq->skreq = skreq;
-
-	/* send the crypto request */
-	return nitrox_process_se_request(nctx->ndev, creq,
-					 nitrox_skcipher_callback, skreq);
-}
-
-static int nitrox_aes_encrypt(struct skcipher_request *skreq)
-{
-	return nitrox_skcipher_crypt(skreq, true);
-}
-
-static int nitrox_aes_decrypt(struct skcipher_request *skreq)
-{
-	return nitrox_skcipher_crypt(skreq, false);
-}
-
-static int nitrox_3des_setkey(struct crypto_skcipher *cipher,
-			      const u8 *key, unsigned int keylen)
-{
-	if (keylen != DES3_EDE_KEY_SIZE) {
-		crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-
-	return nitrox_skcipher_setkey(cipher, 0, key, keylen);
-}
-
-static int nitrox_3des_encrypt(struct skcipher_request *skreq)
-{
-	return nitrox_skcipher_crypt(skreq, true);
-}
-
-static int nitrox_3des_decrypt(struct skcipher_request *skreq)
-{
-	return nitrox_skcipher_crypt(skreq, false);
-}
-
-static int nitrox_aes_xts_setkey(struct crypto_skcipher *cipher,
-				 const u8 *key, unsigned int keylen)
-{
-	struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
-	struct nitrox_crypto_ctx *nctx = crypto_tfm_ctx(tfm);
-	struct flexi_crypto_context *fctx;
-	int aes_keylen, ret;
-
-	ret = xts_check_key(tfm, key, keylen);
-	if (ret)
-		return ret;
-
-	keylen /= 2;
-
-	aes_keylen = flexi_aes_keylen(keylen);
-	if (aes_keylen < 0) {
-		crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
+		nitrox_unregister_skciphers();
+		return err;
 	}
 
-	fctx = nctx->u.fctx;
-	/* copy KEY2 */
-	memcpy(fctx->auth.u.key2, (key + keylen), keylen);
-
-	return nitrox_skcipher_setkey(cipher, aes_keylen, key, keylen);
-}
-
-static int nitrox_aes_ctr_rfc3686_setkey(struct crypto_skcipher *cipher,
-					 const u8 *key, unsigned int keylen)
-{
-	struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
-	struct nitrox_crypto_ctx *nctx = crypto_tfm_ctx(tfm);
-	struct flexi_crypto_context *fctx;
-	int aes_keylen;
-
-	if (keylen < CTR_RFC3686_NONCE_SIZE)
-		return -EINVAL;
-
-	fctx = nctx->u.fctx;
-
-	memcpy(fctx->crypto.iv, key + (keylen - CTR_RFC3686_NONCE_SIZE),
-	       CTR_RFC3686_NONCE_SIZE);
-
-	keylen -= CTR_RFC3686_NONCE_SIZE;
-
-	aes_keylen = flexi_aes_keylen(keylen);
-	if (aes_keylen < 0) {
-		crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-	return nitrox_skcipher_setkey(cipher, aes_keylen, key, keylen);
-}
-
-static struct skcipher_alg nitrox_skciphers[] = { {
-	.base = {
-		.cra_name = "cbc(aes)",
-		.cra_driver_name = "n5_cbc(aes)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = AES_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = AES_MIN_KEY_SIZE,
-	.max_keysize = AES_MAX_KEY_SIZE,
-	.ivsize = AES_BLOCK_SIZE,
-	.setkey = nitrox_aes_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "ecb(aes)",
-		.cra_driver_name = "n5_ecb(aes)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = AES_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = AES_MIN_KEY_SIZE,
-	.max_keysize = AES_MAX_KEY_SIZE,
-	.ivsize = AES_BLOCK_SIZE,
-	.setkey = nitrox_aes_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "cfb(aes)",
-		.cra_driver_name = "n5_cfb(aes)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = AES_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = AES_MIN_KEY_SIZE,
-	.max_keysize = AES_MAX_KEY_SIZE,
-	.ivsize = AES_BLOCK_SIZE,
-	.setkey = nitrox_aes_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "xts(aes)",
-		.cra_driver_name = "n5_xts(aes)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = AES_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = 2 * AES_MIN_KEY_SIZE,
-	.max_keysize = 2 * AES_MAX_KEY_SIZE,
-	.ivsize = AES_BLOCK_SIZE,
-	.setkey = nitrox_aes_xts_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "rfc3686(ctr(aes))",
-		.cra_driver_name = "n5_rfc3686(ctr(aes))",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = 1,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
-	.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
-	.ivsize = CTR_RFC3686_IV_SIZE,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-	.setkey = nitrox_aes_ctr_rfc3686_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-}, {
-	.base = {
-		.cra_name = "cts(cbc(aes))",
-		.cra_driver_name = "n5_cts(cbc(aes))",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = AES_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_type = &crypto_ablkcipher_type,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = AES_MIN_KEY_SIZE,
-	.max_keysize = AES_MAX_KEY_SIZE,
-	.ivsize = AES_BLOCK_SIZE,
-	.setkey = nitrox_aes_setkey,
-	.encrypt = nitrox_aes_encrypt,
-	.decrypt = nitrox_aes_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "cbc(des3_ede)",
-		.cra_driver_name = "n5_cbc(des3_ede)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = DES3_EDE_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = DES3_EDE_KEY_SIZE,
-	.max_keysize = DES3_EDE_KEY_SIZE,
-	.ivsize = DES3_EDE_BLOCK_SIZE,
-	.setkey = nitrox_3des_setkey,
-	.encrypt = nitrox_3des_encrypt,
-	.decrypt = nitrox_3des_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}, {
-	.base = {
-		.cra_name = "ecb(des3_ede)",
-		.cra_driver_name = "n5_ecb(des3_ede)",
-		.cra_priority = PRIO,
-		.cra_flags = CRYPTO_ALG_ASYNC,
-		.cra_blocksize = DES3_EDE_BLOCK_SIZE,
-		.cra_ctxsize = sizeof(struct nitrox_crypto_ctx),
-		.cra_alignmask = 0,
-		.cra_module = THIS_MODULE,
-	},
-	.min_keysize = DES3_EDE_KEY_SIZE,
-	.max_keysize = DES3_EDE_KEY_SIZE,
-	.ivsize = DES3_EDE_BLOCK_SIZE,
-	.setkey = nitrox_3des_setkey,
-	.encrypt = nitrox_3des_encrypt,
-	.decrypt = nitrox_3des_decrypt,
-	.init = nitrox_skcipher_init,
-	.exit = nitrox_skcipher_exit,
-}
-
-};
-
-int nitrox_crypto_register(void)
-{
-	return crypto_register_skciphers(nitrox_skciphers,
-					 ARRAY_SIZE(nitrox_skciphers));
+	return 0;
 }
 
 void nitrox_crypto_unregister(void)
 {
-	crypto_unregister_skciphers(nitrox_skciphers,
-				    ARRAY_SIZE(nitrox_skciphers));
+	nitrox_unregister_aeads();
+	nitrox_unregister_skciphers();
 }