Commit f2663872 authored by Srikanth Jampala's avatar Srikanth Jampala Committed by Herbert Xu
Browse files

crypto: cavium - Register the CNN55XX supported crypto algorithms. 



Register the Symmetric crypto algorithms supported by
CNN55XX driver with crypto subsystem.

The following Symmetric crypto algorithms are supported,
  - aes with cbc, ecb, cfb, xts, ctr and cts modes
  - des3_ede with cbc and ecb modes

Signed-off-by: default avatarSrikanth Jampala <Jampala.Srikanth@cavium.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 086eac9e

drivers/crypto/cavium/nitrox/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -4,4 +4,5 @@ n5pf-objs := nitrox_main.o \ 
	nitrox_isr.o \

	nitrox_lib.o \

	nitrox_hal.o \

	nitrox_reqmgr.o
 
	nitrox_reqmgr.o \

	nitrox_algs.o

drivers/crypto/cavium/nitrox/nitrox_algs.c

0 → 100644
+457 −0
Original line number Diff line number Diff line 
#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);

	void *fctx;



	/* get the first device */

	nctx->ndev = nitrox_get_first_device();

	if (!nctx->ndev)

		return -ENODEV;



	/* allocate nitrox crypto context */

	fctx = crypto_alloc_context(nctx->ndev);

	if (!fctx) {

		nitrox_put_device(nctx->ndev);

		return -ENOMEM;

	}

	nctx->u.ctx_handle = (uintptr_t)fctx;

	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 *)fctx);

	}

	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 void nitrox_skcipher_callback(struct skcipher_request *skreq,

				     int err)

{

	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;



	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);



	/* copy the iv */

	memcpy(creq->iv, skreq->iv, ivsize);

	creq->ivsize = ivsize;

	creq->src = skreq->src;

	creq->dst = skreq->dst;



	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;

	}



	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));

}



void nitrox_crypto_unregister(void)

{

	crypto_unregister_skciphers(nitrox_skciphers,

				    ARRAY_SIZE(nitrox_skciphers));

}

drivers/crypto/cavium/nitrox/nitrox_common.h

+7 −0
Original line number Diff line number Diff line
@@ -4,6 +4,13 @@ 
#include "nitrox_dev.h"

#include "nitrox_req.h"



int nitrox_crypto_register(void);

void nitrox_crypto_unregister(void);

void *crypto_alloc_context(struct nitrox_device *ndev);

void crypto_free_context(void *ctx);

struct nitrox_device *nitrox_get_first_device(void);

void nitrox_put_device(struct nitrox_device *ndev);



void nitrox_pf_cleanup_isr(struct nitrox_device *ndev);

int nitrox_pf_init_isr(struct nitrox_device *ndev);

drivers/crypto/cavium/nitrox/nitrox_lib.c

+38 −0
Original line number Diff line number Diff line
@@ -137,6 +137,44 @@ static void destroy_crypto_dma_pool(struct nitrox_device *ndev) 
	ndev->ctx_pool = NULL;

}



/*

 * crypto_alloc_context - Allocate crypto context from pool

 * @ndev: NITROX Device

 */

void *crypto_alloc_context(struct nitrox_device *ndev)

{

	struct ctx_hdr *ctx;

	void *vaddr;

	dma_addr_t dma;



	vaddr = dma_pool_alloc(ndev->ctx_pool, (GFP_ATOMIC | __GFP_ZERO), &dma);

	if (!vaddr)

		return NULL;



	/* fill meta data */

	ctx = vaddr;

	ctx->pool = ndev->ctx_pool;

	ctx->dma = dma;

	ctx->ctx_dma = dma + sizeof(struct ctx_hdr);



	return ((u8 *)vaddr + sizeof(struct ctx_hdr));

}



/**

 * crypto_free_context - Free crypto context to pool

 * @ctx: context to free

 */

void crypto_free_context(void *ctx)

{

	struct ctx_hdr *ctxp;



	if (!ctx)

		return;



	ctxp = (struct ctx_hdr *)((u8 *)ctx - sizeof(struct ctx_hdr));

	dma_pool_free(ctxp->pool, ctxp, ctxp->dma);

}



/**

 * nitrox_common_sw_init - allocate software resources.

 * @ndev: NITROX device

drivers/crypto/cavium/nitrox/nitrox_main.c

+40 −0
Original line number Diff line number Diff line
@@ -180,6 +180,35 @@ static void nitrox_remove_from_devlist(struct nitrox_device *ndev) 
	mutex_unlock(&devlist_lock);

}



struct nitrox_device *nitrox_get_first_device(void)

{

	struct nitrox_device *ndev = NULL;



	mutex_lock(&devlist_lock);

	list_for_each_entry(ndev, &ndevlist, list) {

		if (nitrox_ready(ndev))

			break;

	}

	mutex_unlock(&devlist_lock);

	if (!ndev)

		return NULL;



	refcount_inc(&ndev->refcnt);

	/* barrier to sync with other cpus */

	smp_mb__after_atomic();

	return ndev;

}



void nitrox_put_device(struct nitrox_device *ndev)

{

	if (!ndev)

		return;



	refcount_dec(&ndev->refcnt);

	/* barrier to sync with other cpus */

	smp_mb__after_atomic();

}



static int nitrox_reset_device(struct pci_dev *pdev)

{

	int pos = 0;
@@ -526,8 +555,18 @@ static int nitrox_probe(struct pci_dev *pdev, 
	set_bit(NITROX_READY, &ndev->status);

	/* barrier to sync with other cpus */

	smp_mb__after_atomic();



	err = nitrox_crypto_register();

	if (err)

		goto crypto_fail;



	return 0;



crypto_fail:

	nitrox_debugfs_exit(ndev);

	clear_bit(NITROX_READY, &ndev->status);

	/* barrier to sync with other cpus */

	smp_mb__after_atomic();

pf_hw_fail:

	nitrox_pf_sw_cleanup(ndev);

ioremap_err:
@@ -565,6 +604,7 @@ static void nitrox_remove(struct pci_dev *pdev) 
	smp_mb__after_atomic();



	nitrox_remove_from_devlist(ndev);

	nitrox_crypto_unregister();

	nitrox_debugfs_exit(ndev);

	nitrox_pf_sw_cleanup(ndev);

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