[linux-2.6-block.git] / drivers / crypto / qce / skcipher.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
 */

#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <crypto/aes.h>
#include <crypto/internal/des.h>
#include <crypto/internal/skcipher.h>

#include "cipher.h"

static unsigned int aes_sw_max_len = CONFIG_CRYPTO_DEV_QCE_SW_MAX_LEN;
module_param(aes_sw_max_len, uint, 0644);
MODULE_PARM_DESC(aes_sw_max_len,
		 "Only use hardware for AES requests larger than this "
		 "[0=always use hardware; anything <16 breaks AES-GCM; default="
		 __stringify(CONFIG_CRYPTO_DEV_QCE_SW_MAX_LEN)"]");

static LIST_HEAD(skcipher_algs);

static void qce_skcipher_done(void *data)
{
	struct crypto_async_request *async_req = data;
	struct skcipher_request *req = skcipher_request_cast(async_req);
	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
	struct qce_device *qce = tmpl->qce;
	struct qce_result_dump *result_buf = qce->dma.result_buf;
	enum dma_data_direction dir_src, dir_dst;
	u32 status;
	int error;
	bool diff_dst;

	diff_dst = (req->src != req->dst) ? true : false;
	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;

	error = qce_dma_terminate_all(&qce->dma);
	if (error)
		dev_dbg(qce->dev, "skcipher dma termination error (%d)\n",
			error);

	if (diff_dst)
		dma_unmap_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src);
	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);

	sg_free_table(&rctx->dst_tbl);

	error = qce_check_status(qce, &status);
	if (error < 0)
		dev_dbg(qce->dev, "skcipher operation error (%x)\n", status);

	memcpy(rctx->iv, result_buf->encr_cntr_iv, rctx->ivsize);
	qce->async_req_done(tmpl->qce, error);
}

static int
qce_skcipher_async_req_handle(struct crypto_async_request *async_req)
{
	struct skcipher_request *req = skcipher_request_cast(async_req);
	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
	struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
	struct qce_device *qce = tmpl->qce;
	enum dma_data_direction dir_src, dir_dst;
	struct scatterlist *sg;
	bool diff_dst;
	gfp_t gfp;
	int ret;

	rctx->iv = req->iv;
	rctx->ivsize = crypto_skcipher_ivsize(skcipher);
	rctx->cryptlen = req->cryptlen;

	diff_dst = (req->src != req->dst) ? true : false;
	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;

	rctx->src_nents = sg_nents_for_len(req->src, req->cryptlen);
	if (diff_dst)
		rctx->dst_nents = sg_nents_for_len(req->dst, req->cryptlen);
	else
		rctx->dst_nents = rctx->src_nents;
	if (rctx->src_nents < 0) {
		dev_err(qce->dev, "Invalid numbers of src SG.\n");
		return rctx->src_nents;
	}
	if (rctx->dst_nents < 0) {
		dev_err(qce->dev, "Invalid numbers of dst SG.\n");
		return -rctx->dst_nents;
	}

	rctx->dst_nents += 1;

	gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
						GFP_KERNEL : GFP_ATOMIC;

	ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
	if (ret)
		return ret;

	sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);

	sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, req->cryptlen);
	if (IS_ERR(sg)) {
		ret = PTR_ERR(sg);
		goto error_free;
	}

	sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg,
			     QCE_RESULT_BUF_SZ);
	if (IS_ERR(sg)) {
		ret = PTR_ERR(sg);
		goto error_free;
	}

	sg_mark_end(sg);
	rctx->dst_sg = rctx->dst_tbl.sgl;

	ret = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
	if (ret < 0)
		goto error_free;

	if (diff_dst) {
		ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, dir_src);
		if (ret < 0)
			goto error_unmap_dst;
		rctx->src_sg = req->src;
	} else {
		rctx->src_sg = rctx->dst_sg;
	}

	ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, rctx->src_nents,
			       rctx->dst_sg, rctx->dst_nents,
			       qce_skcipher_done, async_req);
	if (ret)
		goto error_unmap_src;

	qce_dma_issue_pending(&qce->dma);

	ret = qce_start(async_req, tmpl->crypto_alg_type, req->cryptlen, 0);
	if (ret)
		goto error_terminate;

	return 0;

error_terminate:
	qce_dma_terminate_all(&qce->dma);
error_unmap_src:
	if (diff_dst)
		dma_unmap_sg(qce->dev, req->src, rctx->src_nents, dir_src);
error_unmap_dst:
	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
error_free:
	sg_free_table(&rctx->dst_tbl);
	return ret;
}

static int qce_skcipher_setkey(struct crypto_skcipher *ablk, const u8 *key,
				 unsigned int keylen)
{
	struct crypto_tfm *tfm = crypto_skcipher_tfm(ablk);
	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
	unsigned long flags = to_cipher_tmpl(ablk)->alg_flags;
	int ret;

	if (!key || !keylen)
		return -EINVAL;

	switch (IS_XTS(flags) ? keylen >> 1 : keylen) {
	case AES_KEYSIZE_128:
	case AES_KEYSIZE_256:
		memcpy(ctx->enc_key, key, keylen);
		break;
	}

	ret = crypto_skcipher_setkey(ctx->fallback, key, keylen);
	if (!ret)
		ctx->enc_keylen = keylen;
	return ret;
}

static int qce_des_setkey(struct crypto_skcipher *ablk, const u8 *key,
			  unsigned int keylen)
{
	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
	int err;

	err = verify_skcipher_des_key(ablk, key);
	if (err)
		return err;

	ctx->enc_keylen = keylen;
	memcpy(ctx->enc_key, key, keylen);
	return 0;
}

static int qce_des3_setkey(struct crypto_skcipher *ablk, const u8 *key,
			   unsigned int keylen)
{
	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
	int err;

	err = verify_skcipher_des3_key(ablk, key);
	if (err)
		return err;

	ctx->enc_keylen = keylen;
	memcpy(ctx->enc_key, key, keylen);
	return 0;
}

static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
	int keylen;
	int ret;

	rctx->flags = tmpl->alg_flags;
	rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
	keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;

	/* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and
	 * is not a multiple of it; pass such requests to the fallback
	 */
	if (IS_AES(rctx->flags) &&
	    (((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) ||
	      req->cryptlen <= aes_sw_max_len) ||
	     (IS_XTS(rctx->flags) && req->cryptlen > QCE_SECTOR_SIZE &&
	      req->cryptlen % QCE_SECTOR_SIZE))) {
		skcipher_request_set_tfm(&rctx->fallback_req, ctx->fallback);
		skcipher_request_set_callback(&rctx->fallback_req,
					      req->base.flags,
					      req->base.complete,
					      req->base.data);
		skcipher_request_set_crypt(&rctx->fallback_req, req->src,
					   req->dst, req->cryptlen, req->iv);
		ret = encrypt ? crypto_skcipher_encrypt(&rctx->fallback_req) :
				crypto_skcipher_decrypt(&rctx->fallback_req);
		return ret;
	}

	return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
}

static int qce_skcipher_encrypt(struct skcipher_request *req)
{
	return qce_skcipher_crypt(req, 1);
}

static int qce_skcipher_decrypt(struct skcipher_request *req)
{
	return qce_skcipher_crypt(req, 0);
}

static int qce_skcipher_init(struct crypto_skcipher *tfm)
{
	/* take the size without the fallback skcipher_request at the end */
	crypto_skcipher_set_reqsize(tfm, offsetof(struct qce_cipher_reqctx,
						  fallback_req));
	return 0;
}

static int qce_skcipher_init_fallback(struct crypto_skcipher *tfm)
{
	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);

	ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(&tfm->base),
					      0, CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(ctx->fallback))
		return PTR_ERR(ctx->fallback);

	crypto_skcipher_set_reqsize(tfm, sizeof(struct qce_cipher_reqctx) +
					 crypto_skcipher_reqsize(ctx->fallback));
	return 0;
}

static void qce_skcipher_exit(struct crypto_skcipher *tfm)
{
	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);

	crypto_free_skcipher(ctx->fallback);
}

struct qce_skcipher_def {
	unsigned long flags;
	const char *name;
	const char *drv_name;
	unsigned int blocksize;
	unsigned int chunksize;
	unsigned int ivsize;
	unsigned int min_keysize;
	unsigned int max_keysize;
};

static const struct qce_skcipher_def skcipher_def[] = {
	{
		.flags		= QCE_ALG_AES | QCE_MODE_ECB,
		.name		= "ecb(aes)",
		.drv_name	= "ecb-aes-qce",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.min_keysize	= AES_MIN_KEY_SIZE,
		.max_keysize	= AES_MAX_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_AES | QCE_MODE_CBC,
		.name		= "cbc(aes)",
		.drv_name	= "cbc-aes-qce",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.min_keysize	= AES_MIN_KEY_SIZE,
		.max_keysize	= AES_MAX_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_AES | QCE_MODE_CTR,
		.name		= "ctr(aes)",
		.drv_name	= "ctr-aes-qce",
		.blocksize	= 1,
		.chunksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.min_keysize	= AES_MIN_KEY_SIZE,
		.max_keysize	= AES_MAX_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_AES | QCE_MODE_XTS,
		.name		= "xts(aes)",
		.drv_name	= "xts-aes-qce",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.min_keysize	= AES_MIN_KEY_SIZE * 2,
		.max_keysize	= AES_MAX_KEY_SIZE * 2,
	},
	{
		.flags		= QCE_ALG_DES | QCE_MODE_ECB,
		.name		= "ecb(des)",
		.drv_name	= "ecb-des-qce",
		.blocksize	= DES_BLOCK_SIZE,
		.ivsize		= 0,
		.min_keysize	= DES_KEY_SIZE,
		.max_keysize	= DES_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_DES | QCE_MODE_CBC,
		.name		= "cbc(des)",
		.drv_name	= "cbc-des-qce",
		.blocksize	= DES_BLOCK_SIZE,
		.ivsize		= DES_BLOCK_SIZE,
		.min_keysize	= DES_KEY_SIZE,
		.max_keysize	= DES_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_3DES | QCE_MODE_ECB,
		.name		= "ecb(des3_ede)",
		.drv_name	= "ecb-3des-qce",
		.blocksize	= DES3_EDE_BLOCK_SIZE,
		.ivsize		= 0,
		.min_keysize	= DES3_EDE_KEY_SIZE,
		.max_keysize	= DES3_EDE_KEY_SIZE,
	},
	{
		.flags		= QCE_ALG_3DES | QCE_MODE_CBC,
		.name		= "cbc(des3_ede)",
		.drv_name	= "cbc-3des-qce",
		.blocksize	= DES3_EDE_BLOCK_SIZE,
		.ivsize		= DES3_EDE_BLOCK_SIZE,
		.min_keysize	= DES3_EDE_KEY_SIZE,
		.max_keysize	= DES3_EDE_KEY_SIZE,
	},
};

static int qce_skcipher_register_one(const struct qce_skcipher_def *def,
				       struct qce_device *qce)
{
	struct qce_alg_template *tmpl;
	struct skcipher_alg *alg;
	int ret;

	tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
	if (!tmpl)
		return -ENOMEM;

	alg = &tmpl->alg.skcipher;

	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		 def->drv_name);

	alg->base.cra_blocksize		= def->blocksize;
	alg->chunksize			= def->chunksize;
	alg->ivsize			= def->ivsize;
	alg->min_keysize		= def->min_keysize;
	alg->max_keysize		= def->max_keysize;
	alg->setkey			= IS_3DES(def->flags) ? qce_des3_setkey :
					  IS_DES(def->flags) ? qce_des_setkey :
					  qce_skcipher_setkey;
	alg->encrypt			= qce_skcipher_encrypt;
	alg->decrypt			= qce_skcipher_decrypt;

	alg->base.cra_priority		= 300;
	alg->base.cra_flags		= CRYPTO_ALG_ASYNC |
					  CRYPTO_ALG_ALLOCATES_MEMORY |
					  CRYPTO_ALG_KERN_DRIVER_ONLY;
	alg->base.cra_ctxsize		= sizeof(struct qce_cipher_ctx);
	alg->base.cra_alignmask		= 0;
	alg->base.cra_module		= THIS_MODULE;

	if (IS_AES(def->flags)) {
		alg->base.cra_flags    |= CRYPTO_ALG_NEED_FALLBACK;
		alg->init		= qce_skcipher_init_fallback;
		alg->exit		= qce_skcipher_exit;
	} else {
		alg->init		= qce_skcipher_init;
	}

	INIT_LIST_HEAD(&tmpl->entry);
	tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_SKCIPHER;
	tmpl->alg_flags = def->flags;
	tmpl->qce = qce;

	ret = crypto_register_skcipher(alg);
	if (ret) {
		kfree(tmpl);
		dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name);
		return ret;
	}

	list_add_tail(&tmpl->entry, &skcipher_algs);
	dev_dbg(qce->dev, "%s is registered\n", alg->base.cra_name);
	return 0;
}

static void qce_skcipher_unregister(struct qce_device *qce)
{
	struct qce_alg_template *tmpl, *n;

	list_for_each_entry_safe(tmpl, n, &skcipher_algs, entry) {
		crypto_unregister_skcipher(&tmpl->alg.skcipher);
		list_del(&tmpl->entry);
		kfree(tmpl);
	}
}

static int qce_skcipher_register(struct qce_device *qce)
{
	int ret, i;

	for (i = 0; i < ARRAY_SIZE(skcipher_def); i++) {
		ret = qce_skcipher_register_one(&skcipher_def[i], qce);
		if (ret)
			goto err;
	}

	return 0;
err:
	qce_skcipher_unregister(qce);
	return ret;
}

const struct qce_algo_ops skcipher_ops = {
	.type = CRYPTO_ALG_TYPE_SKCIPHER,
	.register_algs = qce_skcipher_register,
	.unregister_algs = qce_skcipher_unregister,
	.async_req_handle = qce_skcipher_async_req_handle,
};
Commit	Line	Data
97fb5e8d	1	// SPDX-License-Identifier: GPL-2.0-only
ec8f5d8f SV	2	/*
ec8f5d8f SV	3	* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
ec8f5d8f SV	4	*/
	5
	6	#include <linux/device.h>
0c3dc787	7	#include <linux/dma-mapping.h>
ec8f5d8f	8	#include <linux/interrupt.h>
ce163ba0	9	#include <linux/moduleparam.h>
ec8f5d8f SV	10	#include <linux/types.h>
ec8f5d8f SV	11	#include <crypto/aes.h>
f96c897c	12	#include <crypto/internal/des.h>
2d20ce07	13	#include <crypto/internal/skcipher.h>
ec8f5d8f SV	14
	15	#include "cipher.h"
	16
ce163ba0 EQ	17	static unsigned int aes_sw_max_len = CONFIG_CRYPTO_DEV_QCE_SW_MAX_LEN;
	18	module_param(aes_sw_max_len, uint, 0644);
	19	MODULE_PARM_DESC(aes_sw_max_len,
	20	"Only use hardware for AES requests larger than this "
	21	"[0=always use hardware; anything <16 breaks AES-GCM; default="
d069b204	22	__stringify(CONFIG_CRYPTO_DEV_QCE_SW_MAX_LEN)"]");
ce163ba0	23
8bf08715	24	static LIST_HEAD(skcipher_algs);
ec8f5d8f	25
8bf08715	26	static void qce_skcipher_done(void *data)
ec8f5d8f SV	27	{
ec8f5d8f SV	28	struct crypto_async_request *async_req = data;
8bf08715 AB	29	struct skcipher_request *req = skcipher_request_cast(async_req);
	30	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
	31	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
ec8f5d8f	32	struct qce_device *qce = tmpl->qce;
3e806a12	33	struct qce_result_dump *result_buf = qce->dma.result_buf;
ec8f5d8f SV	34	enum dma_data_direction dir_src, dir_dst;
	35	u32 status;
	36	int error;
	37	bool diff_dst;
	38
	39	diff_dst = (req->src != req->dst) ? true : false;
	40	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
	41	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
	42
	43	error = qce_dma_terminate_all(&qce->dma);
	44	if (error)
8bf08715	45	dev_dbg(qce->dev, "skcipher dma termination error (%d)\n",
ec8f5d8f SV	46	error);
	47
	48	if (diff_dst)
fea40451 LC	49	dma_unmap_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src);
fea40451 LC	50	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
ec8f5d8f SV	51
	52	sg_free_table(&rctx->dst_tbl);
	53
	54	error = qce_check_status(qce, &status);
	55	if (error < 0)
8bf08715	56	dev_dbg(qce->dev, "skcipher operation error (%x)\n", status);
ec8f5d8f	57
3e806a12	58	memcpy(rctx->iv, result_buf->encr_cntr_iv, rctx->ivsize);
ec8f5d8f SV	59	qce->async_req_done(tmpl->qce, error);
	60	}
	61
	62	static int
8bf08715	63	qce_skcipher_async_req_handle(struct crypto_async_request *async_req)
ec8f5d8f	64	{
8bf08715 AB	65	struct skcipher_request *req = skcipher_request_cast(async_req);
	66	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
	67	struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
	68	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
ec8f5d8f SV	69	struct qce_device *qce = tmpl->qce;
	70	enum dma_data_direction dir_src, dir_dst;
	71	struct scatterlist *sg;
	72	bool diff_dst;
	73	gfp_t gfp;
	74	int ret;
	75
8bf08715 AB	76	rctx->iv = req->iv;
	77	rctx->ivsize = crypto_skcipher_ivsize(skcipher);
	78	rctx->cryptlen = req->cryptlen;
ec8f5d8f SV	79
	80	diff_dst = (req->src != req->dst) ? true : false;
	81	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
	82	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
	83
8bf08715	84	rctx->src_nents = sg_nents_for_len(req->src, req->cryptlen);
fea40451	85	if (diff_dst)
8bf08715	86	rctx->dst_nents = sg_nents_for_len(req->dst, req->cryptlen);
fea40451	87	else
ec8f5d8f	88	rctx->dst_nents = rctx->src_nents;
4fa9948c LC	89	if (rctx->src_nents < 0) {
	90	dev_err(qce->dev, "Invalid numbers of src SG.\n");
	91	return rctx->src_nents;
	92	}
	93	if (rctx->dst_nents < 0) {
	94	dev_err(qce->dev, "Invalid numbers of dst SG.\n");
	95	return -rctx->dst_nents;
	96	}
ec8f5d8f SV	97
	98	rctx->dst_nents += 1;
	99
	100	gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
	101	GFP_KERNEL : GFP_ATOMIC;
	102
	103	ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
	104	if (ret)
	105	return ret;
	106
	107	sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
	108
d6364b81	109	sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, req->cryptlen);
ec8f5d8f SV	110	if (IS_ERR(sg)) {
	111	ret = PTR_ERR(sg);
	112	goto error_free;
	113	}
	114
d6364b81 EQ	115	sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg,
d6364b81 EQ	116	QCE_RESULT_BUF_SZ);
ec8f5d8f SV	117	if (IS_ERR(sg)) {
	118	ret = PTR_ERR(sg);
	119	goto error_free;
	120	}
	121
	122	sg_mark_end(sg);
	123	rctx->dst_sg = rctx->dst_tbl.sgl;
	124
fea40451	125	ret = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
ec8f5d8f SV	126	if (ret < 0)
	127	goto error_free;
	128
	129	if (diff_dst) {
fea40451	130	ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, dir_src);
ec8f5d8f SV	131	if (ret < 0)
	132	goto error_unmap_dst;
	133	rctx->src_sg = req->src;
	134	} else {
	135	rctx->src_sg = rctx->dst_sg;
	136	}
	137
	138	ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, rctx->src_nents,
	139	rctx->dst_sg, rctx->dst_nents,
8bf08715	140	qce_skcipher_done, async_req);
ec8f5d8f SV	141	if (ret)
	142	goto error_unmap_src;
	143
	144	qce_dma_issue_pending(&qce->dma);
	145
8bf08715	146	ret = qce_start(async_req, tmpl->crypto_alg_type, req->cryptlen, 0);
ec8f5d8f SV	147	if (ret)
	148	goto error_terminate;
	149
	150	return 0;
	151
	152	error_terminate:
	153	qce_dma_terminate_all(&qce->dma);
	154	error_unmap_src:
	155	if (diff_dst)
fea40451	156	dma_unmap_sg(qce->dev, req->src, rctx->src_nents, dir_src);
ec8f5d8f	157	error_unmap_dst:
fea40451	158	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
ec8f5d8f SV	159	error_free:
	160	sg_free_table(&rctx->dst_tbl);
	161	return ret;
	162	}
	163
8bf08715	164	static int qce_skcipher_setkey(struct crypto_skcipher ablk, const u8 key,
ec8f5d8f SV	165	unsigned int keylen)
ec8f5d8f SV	166	{
8bf08715	167	struct crypto_tfm *tfm = crypto_skcipher_tfm(ablk);
ec8f5d8f	168	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
7de4c2bd	169	unsigned long flags = to_cipher_tmpl(ablk)->alg_flags;
ec8f5d8f SV	170	int ret;
	171
	172	if (!key \|\| !keylen)
	173	return -EINVAL;
	174
7de4c2bd	175	switch (IS_XTS(flags) ? keylen >> 1 : keylen) {
f96c897c AB	176	case AES_KEYSIZE_128:
f96c897c AB	177	case AES_KEYSIZE_256:
ce163ba0	178	memcpy(ctx->enc_key, key, keylen);
f96c897c	179	break;
ec8f5d8f SV	180	}
ec8f5d8f SV	181
90e2f782	182	ret = crypto_skcipher_setkey(ctx->fallback, key, keylen);
ec8f5d8f SV	183	if (!ret)
	184	ctx->enc_keylen = keylen;
	185	return ret;
f96c897c AB	186	}
f96c897c AB	187
8bf08715	188	static int qce_des_setkey(struct crypto_skcipher ablk, const u8 key,
f96c897c AB	189	unsigned int keylen)
f96c897c AB	190	{
8bf08715	191	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
f96c897c AB	192	int err;
f96c897c AB	193
8bf08715	194	err = verify_skcipher_des_key(ablk, key);
f96c897c AB	195	if (err)
	196	return err;
	197
	198	ctx->enc_keylen = keylen;
	199	memcpy(ctx->enc_key, key, keylen);
	200	return 0;
ec8f5d8f SV	201	}
ec8f5d8f SV	202
8bf08715	203	static int qce_des3_setkey(struct crypto_skcipher ablk, const u8 key,
5feaaae1 HX	204	unsigned int keylen)
5feaaae1 HX	205	{
8bf08715	206	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
5feaaae1 HX	207	int err;
5feaaae1 HX	208
8bf08715	209	err = verify_skcipher_des3_key(ablk, key);
f96c897c	210	if (err)
5feaaae1	211	return err;
5feaaae1 HX	212
	213	ctx->enc_keylen = keylen;
	214	memcpy(ctx->enc_key, key, keylen);
	215	return 0;
	216	}
	217
8bf08715	218	static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
ec8f5d8f	219	{
8bf08715 AB	220	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	221	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	222	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
ec8f5d8f	223	struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
7de4c2bd	224	int keylen;
ec8f5d8f SV	225	int ret;
	226
	227	rctx->flags = tmpl->alg_flags;
	228	rctx->flags \|= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
7de4c2bd	229	keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;
ec8f5d8f	230
7f19380b EQ	231	/* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and
	232	* is not a multiple of it; pass such requests to the fallback
	233	*/
ce163ba0	234	if (IS_AES(rctx->flags) &&
7f19380b EQ	235	(((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) \|\|
	236	req->cryptlen <= aes_sw_max_len) \|\|
	237	(IS_XTS(rctx->flags) && req->cryptlen > QCE_SECTOR_SIZE &&
	238	req->cryptlen % QCE_SECTOR_SIZE))) {
90e2f782 AB	239	skcipher_request_set_tfm(&rctx->fallback_req, ctx->fallback);
	240	skcipher_request_set_callback(&rctx->fallback_req,
	241	req->base.flags,
	242	req->base.complete,
	243	req->base.data);
	244	skcipher_request_set_crypt(&rctx->fallback_req, req->src,
	245	req->dst, req->cryptlen, req->iv);
	246	ret = encrypt ? crypto_skcipher_encrypt(&rctx->fallback_req) :
	247	crypto_skcipher_decrypt(&rctx->fallback_req);
ec8f5d8f SV	248	return ret;
	249	}
	250
	251	return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
	252	}
	253
8bf08715	254	static int qce_skcipher_encrypt(struct skcipher_request *req)
ec8f5d8f	255	{
8bf08715	256	return qce_skcipher_crypt(req, 1);
ec8f5d8f SV	257	}
ec8f5d8f SV	258
8bf08715	259	static int qce_skcipher_decrypt(struct skcipher_request *req)
ec8f5d8f	260	{
8bf08715	261	return qce_skcipher_crypt(req, 0);
ec8f5d8f SV	262	}
ec8f5d8f SV	263
8bf08715	264	static int qce_skcipher_init(struct crypto_skcipher *tfm)
ec8f5d8f	265	{
90e2f782 AB	266	/* take the size without the fallback skcipher_request at the end */
	267	crypto_skcipher_set_reqsize(tfm, offsetof(struct qce_cipher_reqctx,
	268	fallback_req));
8ceda883 EQ	269	return 0;
8ceda883 EQ	270	}
ec8f5d8f	271
8ceda883 EQ	272	static int qce_skcipher_init_fallback(struct crypto_skcipher *tfm)
	273	{
	274	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	275
90e2f782 AB	276	ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(&tfm->base),
	277	0, CRYPTO_ALG_NEED_FALLBACK);
	278	if (IS_ERR(ctx->fallback))
	279	return PTR_ERR(ctx->fallback);
	280
	281	crypto_skcipher_set_reqsize(tfm, sizeof(struct qce_cipher_reqctx) +
	282	crypto_skcipher_reqsize(ctx->fallback));
	283	return 0;
ec8f5d8f SV	284	}
ec8f5d8f SV	285
8bf08715	286	static void qce_skcipher_exit(struct crypto_skcipher *tfm)
ec8f5d8f	287	{
8bf08715	288	struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
ec8f5d8f	289
90e2f782	290	crypto_free_skcipher(ctx->fallback);
ec8f5d8f SV	291	}
ec8f5d8f SV	292
8bf08715	293	struct qce_skcipher_def {
ec8f5d8f SV	294	unsigned long flags;
	295	const char *name;
	296	const char *drv_name;
	297	unsigned int blocksize;
bb5c863b	298	unsigned int chunksize;
ec8f5d8f SV	299	unsigned int ivsize;
	300	unsigned int min_keysize;
	301	unsigned int max_keysize;
	302	};
	303
8bf08715	304	static const struct qce_skcipher_def skcipher_def[] = {
ec8f5d8f SV	305	{
	306	.flags = QCE_ALG_AES \| QCE_MODE_ECB,
	307	.name = "ecb(aes)",
	308	.drv_name = "ecb-aes-qce",
	309	.blocksize = AES_BLOCK_SIZE,
	310	.ivsize = AES_BLOCK_SIZE,
	311	.min_keysize = AES_MIN_KEY_SIZE,
	312	.max_keysize = AES_MAX_KEY_SIZE,
	313	},
	314	{
	315	.flags = QCE_ALG_AES \| QCE_MODE_CBC,
	316	.name = "cbc(aes)",
	317	.drv_name = "cbc-aes-qce",
	318	.blocksize = AES_BLOCK_SIZE,
	319	.ivsize = AES_BLOCK_SIZE,
	320	.min_keysize = AES_MIN_KEY_SIZE,
	321	.max_keysize = AES_MAX_KEY_SIZE,
	322	},
	323	{
	324	.flags = QCE_ALG_AES \| QCE_MODE_CTR,
	325	.name = "ctr(aes)",
	326	.drv_name = "ctr-aes-qce",
bb5c863b EQ	327	.blocksize = 1,
bb5c863b EQ	328	.chunksize = AES_BLOCK_SIZE,
ec8f5d8f SV	329	.ivsize = AES_BLOCK_SIZE,
	330	.min_keysize = AES_MIN_KEY_SIZE,
	331	.max_keysize = AES_MAX_KEY_SIZE,
	332	},
	333	{
	334	.flags = QCE_ALG_AES \| QCE_MODE_XTS,
	335	.name = "xts(aes)",
	336	.drv_name = "xts-aes-qce",
	337	.blocksize = AES_BLOCK_SIZE,
	338	.ivsize = AES_BLOCK_SIZE,
7de4c2bd EQ	339	.min_keysize = AES_MIN_KEY_SIZE * 2,
7de4c2bd EQ	340	.max_keysize = AES_MAX_KEY_SIZE * 2,
ec8f5d8f SV	341	},
	342	{
	343	.flags = QCE_ALG_DES \| QCE_MODE_ECB,
	344	.name = "ecb(des)",
	345	.drv_name = "ecb-des-qce",
	346	.blocksize = DES_BLOCK_SIZE,
	347	.ivsize = 0,
	348	.min_keysize = DES_KEY_SIZE,
	349	.max_keysize = DES_KEY_SIZE,
	350	},
	351	{
	352	.flags = QCE_ALG_DES \| QCE_MODE_CBC,
	353	.name = "cbc(des)",
	354	.drv_name = "cbc-des-qce",
	355	.blocksize = DES_BLOCK_SIZE,
	356	.ivsize = DES_BLOCK_SIZE,
	357	.min_keysize = DES_KEY_SIZE,
	358	.max_keysize = DES_KEY_SIZE,
	359	},
	360	{
	361	.flags = QCE_ALG_3DES \| QCE_MODE_ECB,
	362	.name = "ecb(des3_ede)",
	363	.drv_name = "ecb-3des-qce",
	364	.blocksize = DES3_EDE_BLOCK_SIZE,
	365	.ivsize = 0,
	366	.min_keysize = DES3_EDE_KEY_SIZE,
	367	.max_keysize = DES3_EDE_KEY_SIZE,
	368	},
	369	{
	370	.flags = QCE_ALG_3DES \| QCE_MODE_CBC,
	371	.name = "cbc(des3_ede)",
	372	.drv_name = "cbc-3des-qce",
	373	.blocksize = DES3_EDE_BLOCK_SIZE,
	374	.ivsize = DES3_EDE_BLOCK_SIZE,
	375	.min_keysize = DES3_EDE_KEY_SIZE,
	376	.max_keysize = DES3_EDE_KEY_SIZE,
	377	},
	378	};
	379
8bf08715	380	static int qce_skcipher_register_one(const struct qce_skcipher_def *def,
ec8f5d8f SV	381	struct qce_device *qce)
	382	{
	383	struct qce_alg_template *tmpl;
8bf08715	384	struct skcipher_alg *alg;
ec8f5d8f SV	385	int ret;
	386
	387	tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
	388	if (!tmpl)
	389	return -ENOMEM;
	390
8bf08715	391	alg = &tmpl->alg.skcipher;
ec8f5d8f	392
8bf08715 AB	393	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
8bf08715 AB	394	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
ec8f5d8f SV	395	def->drv_name);
ec8f5d8f SV	396
8bf08715	397	alg->base.cra_blocksize = def->blocksize;
bb5c863b	398	alg->chunksize = def->chunksize;
8bf08715 AB	399	alg->ivsize = def->ivsize;
	400	alg->min_keysize = def->min_keysize;
	401	alg->max_keysize = def->max_keysize;
	402	alg->setkey = IS_3DES(def->flags) ? qce_des3_setkey :
	403	IS_DES(def->flags) ? qce_des_setkey :
	404	qce_skcipher_setkey;
	405	alg->encrypt = qce_skcipher_encrypt;
	406	alg->decrypt = qce_skcipher_decrypt;
	407
	408	alg->base.cra_priority = 300;
	409	alg->base.cra_flags = CRYPTO_ALG_ASYNC \|
b8aa7dc5	410	CRYPTO_ALG_ALLOCATES_MEMORY \|
8bf08715 AB	411	CRYPTO_ALG_KERN_DRIVER_ONLY;
	412	alg->base.cra_ctxsize = sizeof(struct qce_cipher_ctx);
	413	alg->base.cra_alignmask = 0;
	414	alg->base.cra_module = THIS_MODULE;
	415
8ceda883 EQ	416	if (IS_AES(def->flags)) {
	417	alg->base.cra_flags \|= CRYPTO_ALG_NEED_FALLBACK;
	418	alg->init = qce_skcipher_init_fallback;
	419	alg->exit = qce_skcipher_exit;
	420	} else {
	421	alg->init = qce_skcipher_init;
	422	}
ec8f5d8f SV	423
ec8f5d8f SV	424	INIT_LIST_HEAD(&tmpl->entry);
8bf08715	425	tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_SKCIPHER;
ec8f5d8f SV	426	tmpl->alg_flags = def->flags;
	427	tmpl->qce = qce;
	428
8bf08715	429	ret = crypto_register_skcipher(alg);
ec8f5d8f SV	430	if (ret) {
ec8f5d8f SV	431	kfree(tmpl);
8bf08715	432	dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name);
ec8f5d8f SV	433	return ret;
	434	}
	435
8bf08715 AB	436	list_add_tail(&tmpl->entry, &skcipher_algs);
8bf08715 AB	437	dev_dbg(qce->dev, "%s is registered\n", alg->base.cra_name);
ec8f5d8f SV	438	return 0;
	439	}
	440
8bf08715	441	static void qce_skcipher_unregister(struct qce_device *qce)
ec8f5d8f SV	442	{
	443	struct qce_alg_template tmpl, n;
	444
8bf08715 AB	445	list_for_each_entry_safe(tmpl, n, &skcipher_algs, entry) {
8bf08715 AB	446	crypto_unregister_skcipher(&tmpl->alg.skcipher);
ec8f5d8f SV	447	list_del(&tmpl->entry);
	448	kfree(tmpl);
	449	}
	450	}
	451
8bf08715	452	static int qce_skcipher_register(struct qce_device *qce)
ec8f5d8f SV	453	{
	454	int ret, i;
	455
8bf08715 AB	456	for (i = 0; i < ARRAY_SIZE(skcipher_def); i++) {
8bf08715 AB	457	ret = qce_skcipher_register_one(&skcipher_def[i], qce);
ec8f5d8f SV	458	if (ret)
	459	goto err;
	460	}
	461
	462	return 0;
	463	err:
8bf08715	464	qce_skcipher_unregister(qce);
ec8f5d8f SV	465	return ret;
	466	}
	467
8bf08715 AB	468	const struct qce_algo_ops skcipher_ops = {
	469	.type = CRYPTO_ALG_TYPE_SKCIPHER,
	470	.register_algs = qce_skcipher_register,
	471	.unregister_algs = qce_skcipher_unregister,
	472	.async_req_handle = qce_skcipher_async_req_handle,
ec8f5d8f	473	};