[deliverable/linux.git] / drivers / crypto / qce / ablkcipher.c

/*
 * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <crypto/des.h>

#include "cipher.h"

static LIST_HEAD(ablkcipher_algs);

static void qce_ablkcipher_done(void *data)
{
	struct crypto_async_request *async_req = data;
	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
	struct qce_device *qce = tmpl->qce;
	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, "ablkcipher dma termination error (%d)\n",
			error);

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

	sg_free_table(&rctx->dst_tbl);

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

	qce->async_req_done(tmpl->qce, error);
}

static int
qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req)
{
	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
	struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
	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->info;
	rctx->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
	rctx->cryptlen = req->nbytes;

	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 = qce_countsg(req->src, req->nbytes,
				      &rctx->src_chained);
	if (diff_dst) {
		rctx->dst_nents = qce_countsg(req->dst, req->nbytes,
					      &rctx->dst_chained);
	} else {
		rctx->dst_nents = rctx->src_nents;
		rctx->dst_chained = rctx->src_chained;
	}

	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);
	if (IS_ERR(sg)) {
		ret = PTR_ERR(sg);
		goto error_free;
	}

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

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

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

	if (diff_dst) {
		ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, dir_src,
				rctx->src_chained);
		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_ablkcipher_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->nbytes, 0);
	if (ret)
		goto error_terminate;

	return 0;

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

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

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

	if (IS_AES(flags)) {
		switch (keylen) {
		case AES_KEYSIZE_128:
		case AES_KEYSIZE_256:
			break;
		default:
			goto fallback;
		}
	} else if (IS_DES(flags)) {
		u32 tmp[DES_EXPKEY_WORDS];

		ret = des_ekey(tmp, key);
		if (!ret && crypto_ablkcipher_get_flags(ablk) &
		    CRYPTO_TFM_REQ_WEAK_KEY)
			goto weakkey;
	}

	ctx->enc_keylen = keylen;
	memcpy(ctx->enc_key, key, keylen);
	return 0;
fallback:
	ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen);
	if (!ret)
		ctx->enc_keylen = keylen;
	return ret;
weakkey:
	crypto_ablkcipher_set_flags(ablk, CRYPTO_TFM_RES_WEAK_KEY);
	return -EINVAL;
}

static int qce_ablkcipher_crypt(struct ablkcipher_request *req, int encrypt)
{
	struct crypto_tfm *tfm =
			crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
	struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
	int ret;

	rctx->flags = tmpl->alg_flags;
	rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;

	if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 &&
	    ctx->enc_keylen != AES_KEYSIZE_256) {
		ablkcipher_request_set_tfm(req, ctx->fallback);
		ret = encrypt ? crypto_ablkcipher_encrypt(req) :
				crypto_ablkcipher_decrypt(req);
		ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
		return ret;
	}

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

static int qce_ablkcipher_encrypt(struct ablkcipher_request *req)
{
	return qce_ablkcipher_crypt(req, 1);
}

static int qce_ablkcipher_decrypt(struct ablkcipher_request *req)
{
	return qce_ablkcipher_crypt(req, 0);
}

static int qce_ablkcipher_init(struct crypto_tfm *tfm)
{
	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);

	memset(ctx, 0, sizeof(*ctx));
	tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);

	ctx->fallback = crypto_alloc_ablkcipher(crypto_tfm_alg_name(tfm),
						CRYPTO_ALG_TYPE_ABLKCIPHER,
						CRYPTO_ALG_ASYNC |
						CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(ctx->fallback))
		return PTR_ERR(ctx->fallback);

	return 0;
}

static void qce_ablkcipher_exit(struct crypto_tfm *tfm)
{
	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);

	crypto_free_ablkcipher(ctx->fallback);
}

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

static const struct qce_ablkcipher_def ablkcipher_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	= 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,
		.max_keysize	= AES_MAX_KEY_SIZE,
	},
	{
		.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_ablkcipher_register_one(const struct qce_ablkcipher_def *def,
				       struct qce_device *qce)
{
	struct qce_alg_template *tmpl;
	struct crypto_alg *alg;
	int ret;

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

	alg = &tmpl->alg.crypto;

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

	alg->cra_blocksize = def->blocksize;
	alg->cra_ablkcipher.ivsize = def->ivsize;
	alg->cra_ablkcipher.min_keysize = def->min_keysize;
	alg->cra_ablkcipher.max_keysize = def->max_keysize;
	alg->cra_ablkcipher.setkey = qce_ablkcipher_setkey;
	alg->cra_ablkcipher.encrypt = qce_ablkcipher_encrypt;
	alg->cra_ablkcipher.decrypt = qce_ablkcipher_decrypt;

	alg->cra_priority = 300;
	alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC |
			 CRYPTO_ALG_NEED_FALLBACK;
	alg->cra_ctxsize = sizeof(struct qce_cipher_ctx);
	alg->cra_alignmask = 0;
	alg->cra_type = &crypto_ablkcipher_type;
	alg->cra_module = THIS_MODULE;
	alg->cra_init = qce_ablkcipher_init;
	alg->cra_exit = qce_ablkcipher_exit;
	INIT_LIST_HEAD(&alg->cra_list);

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

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

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

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

	list_for_each_entry_safe(tmpl, n, &ablkcipher_algs, entry) {
		crypto_unregister_alg(&tmpl->alg.crypto);
		list_del(&tmpl->entry);
		kfree(tmpl);
	}
}

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

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

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

const struct qce_algo_ops ablkcipher_ops = {
	.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
	.register_algs = qce_ablkcipher_register,
	.unregister_algs = qce_ablkcipher_unregister,
	.async_req_handle = qce_ablkcipher_async_req_handle,
};
Commit	Line	Data
ec8f5d8f SV	1	/*
	2	* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 and
	6	* only version 2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#include <linux/device.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/types.h>
	17	#include <crypto/aes.h>
	18	#include <crypto/algapi.h>
	19	#include <crypto/des.h>
	20
	21	#include "cipher.h"
	22
	23	static LIST_HEAD(ablkcipher_algs);
	24
	25	static void qce_ablkcipher_done(void *data)
	26	{
	27	struct crypto_async_request *async_req = data;
	28	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	29	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
	30	struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
	31	struct qce_device *qce = tmpl->qce;
	32	enum dma_data_direction dir_src, dir_dst;
	33	u32 status;
	34	int error;
	35	bool diff_dst;
	36
	37	diff_dst = (req->src != req->dst) ? true : false;
	38	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
	39	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
	40
	41	error = qce_dma_terminate_all(&qce->dma);
	42	if (error)
	43	dev_dbg(qce->dev, "ablkcipher dma termination error (%d)\n",
	44	error);
	45
	46	if (diff_dst)
	47	qce_unmapsg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src,
	48	rctx->dst_chained);
	49	qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
	50	rctx->dst_chained);
	51
	52	sg_free_table(&rctx->dst_tbl);
	53
	54	error = qce_check_status(qce, &status);
	55	if (error < 0)
	56	dev_dbg(qce->dev, "ablkcipher operation error (%x)\n", status);
	57
	58	qce->async_req_done(tmpl->qce, error);
	59	}
	60
	61	static int
	62	qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req)
	63	{
	64	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
65	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
66	struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
67	struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
68	struct qce_device *qce = tmpl->qce;
69	enum dma_data_direction dir_src, dir_dst;
70	struct scatterlist *sg;
71	bool diff_dst;
72	gfp_t gfp;
73	int ret;
74
75	rctx->iv = req->info;
76	rctx->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
77	rctx->cryptlen = req->nbytes;
78
79	diff_dst = (req->src != req->dst) ? true : false;
80	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
81	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
82
83	rctx->src_nents = qce_countsg(req->src, req->nbytes,
84	&rctx->src_chained);
85	if (diff_dst) {
86	rctx->dst_nents = qce_countsg(req->dst, req->nbytes,
87	&rctx->dst_chained);
88	} else {
89	rctx->dst_nents = rctx->src_nents;
90	rctx->dst_chained = rctx->src_chained;
91	}
92
93	rctx->dst_nents += 1;
94
95	gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
96	GFP_KERNEL : GFP_ATOMIC;
97
98	ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
99	if (ret)
100	return ret;
101
102	sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
103
104	sg = qce_sgtable_add(&rctx->dst_tbl, req->dst);
105	if (IS_ERR(sg)) {
106	ret = PTR_ERR(sg);
107	goto error_free;
108	}
109
110	sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg);
111	if (IS_ERR(sg)) {
112	ret = PTR_ERR(sg);
113	goto error_free;
114	}
115
116	sg_mark_end(sg);
117	rctx->dst_sg = rctx->dst_tbl.sgl;
118
119	ret = qce_mapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
120	rctx->dst_chained);
121	if (ret < 0)
122	goto error_free;
123
124	if (diff_dst) {
125	ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, dir_src,
126	rctx->src_chained);
127	if (ret < 0)
128	goto error_unmap_dst;
129	rctx->src_sg = req->src;
130	} else {
131	rctx->src_sg = rctx->dst_sg;
132	}
133
134	ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, rctx->src_nents,
135	rctx->dst_sg, rctx->dst_nents,
136	qce_ablkcipher_done, async_req);
137	if (ret)
138	goto error_unmap_src;
139
140	qce_dma_issue_pending(&qce->dma);
141
142	ret = qce_start(async_req, tmpl->crypto_alg_type, req->nbytes, 0);
143	if (ret)
144	goto error_terminate;
145
146	return 0;
147
148	error_terminate:
149	qce_dma_terminate_all(&qce->dma);
150	error_unmap_src:
151	if (diff_dst)
152	qce_unmapsg(qce->dev, req->src, rctx->src_nents, dir_src,
153	rctx->src_chained);
154	error_unmap_dst:
155	qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
156	rctx->dst_chained);
157	error_free:
158	sg_free_table(&rctx->dst_tbl);
159	return ret;
160	}
161
162	static int qce_ablkcipher_setkey(struct crypto_ablkcipher ablk, const u8 key,
163	unsigned int keylen)
164	{
165	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(ablk);
166	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
167	unsigned long flags = to_cipher_tmpl(tfm)->alg_flags;
168	int ret;
169
170	if (!key \|\| !keylen)
171	return -EINVAL;
172
173	if (IS_AES(flags)) {
174	switch (keylen) {
175	case AES_KEYSIZE_128:
176	case AES_KEYSIZE_256:
177	break;
178	default:
179	goto fallback;
180	}
181	} else if (IS_DES(flags)) {
182	u32 tmp[DES_EXPKEY_WORDS];
183
184	ret = des_ekey(tmp, key);
185	if (!ret && crypto_ablkcipher_get_flags(ablk) &
186	CRYPTO_TFM_REQ_WEAK_KEY)
187	goto weakkey;
188	}
189
190	ctx->enc_keylen = keylen;
191	memcpy(ctx->enc_key, key, keylen);
192	return 0;
193	fallback:
194	ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen);
195	if (!ret)
196	ctx->enc_keylen = keylen;
197	return ret;
198	weakkey:
199	crypto_ablkcipher_set_flags(ablk, CRYPTO_TFM_RES_WEAK_KEY);
200	return -EINVAL;
201	}
202
203	static int qce_ablkcipher_crypt(struct ablkcipher_request *req, int encrypt)
204	{
205	struct crypto_tfm *tfm =
206	crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
207	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
208	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
209	struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
210	int ret;
211
212	rctx->flags = tmpl->alg_flags;
213	rctx->flags \|= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
214
215	if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 &&
216	ctx->enc_keylen != AES_KEYSIZE_256) {
217	ablkcipher_request_set_tfm(req, ctx->fallback);
218	ret = encrypt ? crypto_ablkcipher_encrypt(req) :
219	crypto_ablkcipher_decrypt(req);
220	ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
221	return ret;
222	}
223
224	return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
225	}
226
227	static int qce_ablkcipher_encrypt(struct ablkcipher_request *req)
228	{
229	return qce_ablkcipher_crypt(req, 1);
230	}
231
232	static int qce_ablkcipher_decrypt(struct ablkcipher_request *req)
233	{
234	return qce_ablkcipher_crypt(req, 0);
235	}
236
237	static int qce_ablkcipher_init(struct crypto_tfm *tfm)
238	{
239	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
240
241	memset(ctx, 0, sizeof(*ctx));
242	tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);
243
244	ctx->fallback = crypto_alloc_ablkcipher(crypto_tfm_alg_name(tfm),
245	CRYPTO_ALG_TYPE_ABLKCIPHER,
246	CRYPTO_ALG_ASYNC \|
247	CRYPTO_ALG_NEED_FALLBACK);
248	if (IS_ERR(ctx->fallback))
249	return PTR_ERR(ctx->fallback);
250
251	return 0;
252	}
253
254	static void qce_ablkcipher_exit(struct crypto_tfm *tfm)
255	{
256	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
257
258	crypto_free_ablkcipher(ctx->fallback);
259	}
260
261	struct qce_ablkcipher_def {
262	unsigned long flags;
263	const char *name;
264	const char *drv_name;
265	unsigned int blocksize;
266	unsigned int ivsize;
267	unsigned int min_keysize;
268	unsigned int max_keysize;
269	};
270
271	static const struct qce_ablkcipher_def ablkcipher_def[] = {
272	{
273	.flags = QCE_ALG_AES \| QCE_MODE_ECB,
274	.name = "ecb(aes)",
275	.drv_name = "ecb-aes-qce",
276	.blocksize = AES_BLOCK_SIZE,
277	.ivsize = AES_BLOCK_SIZE,
278	.min_keysize = AES_MIN_KEY_SIZE,
279	.max_keysize = AES_MAX_KEY_SIZE,
280	},
281	{
282	.flags = QCE_ALG_AES \| QCE_MODE_CBC,
283	.name = "cbc(aes)",
284	.drv_name = "cbc-aes-qce",
285	.blocksize = AES_BLOCK_SIZE,
286	.ivsize = AES_BLOCK_SIZE,
287	.min_keysize = AES_MIN_KEY_SIZE,
288	.max_keysize = AES_MAX_KEY_SIZE,
289	},
290	{
291	.flags = QCE_ALG_AES \| QCE_MODE_CTR,
292	.name = "ctr(aes)",
293	.drv_name = "ctr-aes-qce",
294	.blocksize = AES_BLOCK_SIZE,
295	.ivsize = AES_BLOCK_SIZE,
296	.min_keysize = AES_MIN_KEY_SIZE,
297	.max_keysize = AES_MAX_KEY_SIZE,
298	},
299	{
300	.flags = QCE_ALG_AES \| QCE_MODE_XTS,
301	.name = "xts(aes)",
302	.drv_name = "xts-aes-qce",
303	.blocksize = AES_BLOCK_SIZE,
304	.ivsize = AES_BLOCK_SIZE,
305	.min_keysize = AES_MIN_KEY_SIZE,
306	.max_keysize = AES_MAX_KEY_SIZE,
307	},
308	{
309	.flags = QCE_ALG_DES \| QCE_MODE_ECB,
310	.name = "ecb(des)",
311	.drv_name = "ecb-des-qce",
312	.blocksize = DES_BLOCK_SIZE,
313	.ivsize = 0,
314	.min_keysize = DES_KEY_SIZE,
315	.max_keysize = DES_KEY_SIZE,
316	},
317	{
318	.flags = QCE_ALG_DES \| QCE_MODE_CBC,
319	.name = "cbc(des)",
320	.drv_name = "cbc-des-qce",
321	.blocksize = DES_BLOCK_SIZE,
322	.ivsize = DES_BLOCK_SIZE,
323	.min_keysize = DES_KEY_SIZE,
324	.max_keysize = DES_KEY_SIZE,
325	},
326	{
327	.flags = QCE_ALG_3DES \| QCE_MODE_ECB,
328	.name = "ecb(des3_ede)",
329	.drv_name = "ecb-3des-qce",
330	.blocksize = DES3_EDE_BLOCK_SIZE,
331	.ivsize = 0,
332	.min_keysize = DES3_EDE_KEY_SIZE,
333	.max_keysize = DES3_EDE_KEY_SIZE,
334	},
335	{
336	.flags = QCE_ALG_3DES \| QCE_MODE_CBC,
337	.name = "cbc(des3_ede)",
338	.drv_name = "cbc-3des-qce",
339	.blocksize = DES3_EDE_BLOCK_SIZE,
340	.ivsize = DES3_EDE_BLOCK_SIZE,
341	.min_keysize = DES3_EDE_KEY_SIZE,
342	.max_keysize = DES3_EDE_KEY_SIZE,
343	},
344	};
345
346	static int qce_ablkcipher_register_one(const struct qce_ablkcipher_def *def,
347	struct qce_device *qce)
348	{
349	struct qce_alg_template *tmpl;
350	struct crypto_alg *alg;
351	int ret;
352
353	tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
354	if (!tmpl)
355	return -ENOMEM;
356
357	alg = &tmpl->alg.crypto;
358
359	snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
360	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
361	def->drv_name);
362
363	alg->cra_blocksize = def->blocksize;
364	alg->cra_ablkcipher.ivsize = def->ivsize;
365	alg->cra_ablkcipher.min_keysize = def->min_keysize;
366	alg->cra_ablkcipher.max_keysize = def->max_keysize;
367	alg->cra_ablkcipher.setkey = qce_ablkcipher_setkey;
368	alg->cra_ablkcipher.encrypt = qce_ablkcipher_encrypt;
369	alg->cra_ablkcipher.decrypt = qce_ablkcipher_decrypt;
370
371	alg->cra_priority = 300;
372	alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC \|
373	CRYPTO_ALG_NEED_FALLBACK;
374	alg->cra_ctxsize = sizeof(struct qce_cipher_ctx);
375	alg->cra_alignmask = 0;
376	alg->cra_type = &crypto_ablkcipher_type;
377	alg->cra_module = THIS_MODULE;
378	alg->cra_init = qce_ablkcipher_init;
379	alg->cra_exit = qce_ablkcipher_exit;
380	INIT_LIST_HEAD(&alg->cra_list);
381
382	INIT_LIST_HEAD(&tmpl->entry);
383	tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_ABLKCIPHER;
384	tmpl->alg_flags = def->flags;
385	tmpl->qce = qce;
386
387	ret = crypto_register_alg(alg);
388	if (ret) {
389	kfree(tmpl);
390	dev_err(qce->dev, "%s registration failed\n", alg->cra_name);
391	return ret;
392	}
393
394	list_add_tail(&tmpl->entry, &ablkcipher_algs);
395	dev_dbg(qce->dev, "%s is registered\n", alg->cra_name);
396	return 0;
397	}
398
399	static void qce_ablkcipher_unregister(struct qce_device *qce)
400	{
401	struct qce_alg_template tmpl, n;
402
403	list_for_each_entry_safe(tmpl, n, &ablkcipher_algs, entry) {
404	crypto_unregister_alg(&tmpl->alg.crypto);
405	list_del(&tmpl->entry);
406	kfree(tmpl);
407	}
408	}
409
410	static int qce_ablkcipher_register(struct qce_device *qce)
411	{
412	int ret, i;
413
414	for (i = 0; i < ARRAY_SIZE(ablkcipher_def); i++) {
415	ret = qce_ablkcipher_register_one(&ablkcipher_def[i], qce);
416	if (ret)
417	goto err;
418	}
419
420	return 0;
421	err:
422	qce_ablkcipher_unregister(qce);
423	return ret;
424	}
425
426	const struct qce_algo_ops ablkcipher_ops = {
427	.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
428	.register_algs = qce_ablkcipher_register,
429	.unregister_algs = qce_ablkcipher_unregister,
430	.async_req_handle = qce_ablkcipher_async_req_handle,
431	};