Initial import

1 files changed, 431 insertions, 0 deletions

diff --git a/drivers/crypto/qce/ablkcipher.c b/drivers/crypto/qce/ablkcipher.c
new file mode 100644
index 000000000..ad592de47
--- /dev/null
+++ b/drivers/crypto/qce/ablkcipher.c
@@ -0,0 +1,431 @@
+/*
+ * 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,
+};