Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1122 insertions, 0 deletions

diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c
new file mode 100644
index 000000000..3e3cc28d5
--- /dev/null
+++ b/drivers/crypto/hisilicon/sec/sec_algs.c
@@ -0,0 +1,1122 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2016-2017 Hisilicon Limited. */
+#include <linux/crypto.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <crypto/des.h>
+#include <crypto/skcipher.h>
+#include <crypto/xts.h>
+#include <crypto/internal/skcipher.h>
+
+#include "sec_drv.h"
+
+#define SEC_MAX_CIPHER_KEY		64
+#define SEC_REQ_LIMIT SZ_32M
+
+struct sec_c_alg_cfg {
+	unsigned c_alg		: 3;
+	unsigned c_mode		: 3;
+	unsigned key_len	: 2;
+	unsigned c_width	: 2;
+};
+
+static const struct sec_c_alg_cfg sec_c_alg_cfgs[] =  {
+	[SEC_C_DES_ECB_64] = {
+		.c_alg = SEC_C_ALG_DES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_DES,
+	},
+	[SEC_C_DES_CBC_64] = {
+		.c_alg = SEC_C_ALG_DES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_DES,
+	},
+	[SEC_C_3DES_ECB_192_3KEY] = {
+		.c_alg = SEC_C_ALG_3DES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_3DES_3_KEY,
+	},
+	[SEC_C_3DES_ECB_192_2KEY] = {
+		.c_alg = SEC_C_ALG_3DES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_3DES_2_KEY,
+	},
+	[SEC_C_3DES_CBC_192_3KEY] = {
+		.c_alg = SEC_C_ALG_3DES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_3DES_3_KEY,
+	},
+	[SEC_C_3DES_CBC_192_2KEY] = {
+		.c_alg = SEC_C_ALG_3DES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_3DES_2_KEY,
+	},
+	[SEC_C_AES_ECB_128] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_AES_128,
+	},
+	[SEC_C_AES_ECB_192] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_AES_192,
+	},
+	[SEC_C_AES_ECB_256] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_ECB,
+		.key_len = SEC_KEY_LEN_AES_256,
+	},
+	[SEC_C_AES_CBC_128] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_AES_128,
+	},
+	[SEC_C_AES_CBC_192] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_AES_192,
+	},
+	[SEC_C_AES_CBC_256] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CBC,
+		.key_len = SEC_KEY_LEN_AES_256,
+	},
+	[SEC_C_AES_CTR_128] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CTR,
+		.key_len = SEC_KEY_LEN_AES_128,
+	},
+	[SEC_C_AES_CTR_192] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CTR,
+		.key_len = SEC_KEY_LEN_AES_192,
+	},
+	[SEC_C_AES_CTR_256] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_CTR,
+		.key_len = SEC_KEY_LEN_AES_256,
+	},
+	[SEC_C_AES_XTS_128] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_XTS,
+		.key_len = SEC_KEY_LEN_AES_128,
+	},
+	[SEC_C_AES_XTS_256] = {
+		.c_alg = SEC_C_ALG_AES,
+		.c_mode = SEC_C_MODE_XTS,
+		.key_len = SEC_KEY_LEN_AES_256,
+	},
+	[SEC_C_NULL] = {
+	},
+};
+
+/*
+ * Mutex used to ensure safe operation of reference count of
+ * alg providers
+ */
+static DEFINE_MUTEX(algs_lock);
+static unsigned int active_devs;
+
+static void sec_alg_skcipher_init_template(struct sec_alg_tfm_ctx *ctx,
+					   struct sec_bd_info *req,
+					   enum sec_cipher_alg alg)
+{
+	const struct sec_c_alg_cfg *cfg = &sec_c_alg_cfgs[alg];
+
+	memset(req, 0, sizeof(*req));
+	req->w0 |= cfg->c_mode << SEC_BD_W0_C_MODE_S;
+	req->w1 |= cfg->c_alg << SEC_BD_W1_C_ALG_S;
+	req->w3 |= cfg->key_len << SEC_BD_W3_C_KEY_LEN_S;
+	req->w0 |= cfg->c_width << SEC_BD_W0_C_WIDTH_S;
+
+	req->cipher_key_addr_lo = lower_32_bits(ctx->pkey);
+	req->cipher_key_addr_hi = upper_32_bits(ctx->pkey);
+}
+
+static void sec_alg_skcipher_init_context(struct crypto_skcipher *atfm,
+					  const u8 *key,
+					  unsigned int keylen,
+					  enum sec_cipher_alg alg)
+{
+	struct crypto_tfm *tfm = crypto_skcipher_tfm(atfm);
+	struct sec_alg_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	ctx->cipher_alg = alg;
+	memcpy(ctx->key, key, keylen);
+	sec_alg_skcipher_init_template(ctx, &ctx->req_template,
+				       ctx->cipher_alg);
+}
+
+static void sec_free_hw_sgl(struct sec_hw_sgl *hw_sgl,
+			    dma_addr_t psec_sgl, struct sec_dev_info *info)
+{
+	struct sec_hw_sgl *sgl_current, *sgl_next;
+	dma_addr_t sgl_next_dma;
+
+	sgl_current = hw_sgl;
+	while (sgl_current) {
+		sgl_next = sgl_current->next;
+		sgl_next_dma = sgl_current->next_sgl;
+
+		dma_pool_free(info->hw_sgl_pool, sgl_current, psec_sgl);
+
+		sgl_current = sgl_next;
+		psec_sgl = sgl_next_dma;
+	}
+}
+
+static int sec_alloc_and_fill_hw_sgl(struct sec_hw_sgl **sec_sgl,
+				     dma_addr_t *psec_sgl,
+				     struct scatterlist *sgl,
+				     int count,
+				     struct sec_dev_info *info,
+				     gfp_t gfp)
+{
+	struct sec_hw_sgl *sgl_current = NULL;
+	struct sec_hw_sgl *sgl_next;
+	dma_addr_t sgl_next_dma;
+	struct scatterlist *sg;
+	int ret, sge_index, i;
+
+	if (!count)
+		return -EINVAL;
+
+	for_each_sg(sgl, sg, count, i) {
+		sge_index = i % SEC_MAX_SGE_NUM;
+		if (sge_index == 0) {
+			sgl_next = dma_pool_zalloc(info->hw_sgl_pool,
+						   gfp, &sgl_next_dma);
+			if (!sgl_next) {
+				ret = -ENOMEM;
+				goto err_free_hw_sgls;
+			}
+
+			if (!sgl_current) { /* First one */
+				*psec_sgl = sgl_next_dma;
+				*sec_sgl = sgl_next;
+			} else { /* Chained */
+				sgl_current->entry_sum_in_sgl = SEC_MAX_SGE_NUM;
+				sgl_current->next_sgl = sgl_next_dma;
+				sgl_current->next = sgl_next;
+			}
+			sgl_current = sgl_next;
+		}
+		sgl_current->sge_entries[sge_index].buf = sg_dma_address(sg);
+		sgl_current->sge_entries[sge_index].len = sg_dma_len(sg);
+		sgl_current->data_bytes_in_sgl += sg_dma_len(sg);
+	}
+	sgl_current->entry_sum_in_sgl = count % SEC_MAX_SGE_NUM;
+	sgl_current->next_sgl = 0;
+	(*sec_sgl)->entry_sum_in_chain = count;
+
+	return 0;
+
+err_free_hw_sgls:
+	sec_free_hw_sgl(*sec_sgl, *psec_sgl, info);
+	*psec_sgl = 0;
+
+	return ret;
+}
+
+static int sec_alg_skcipher_setkey(struct crypto_skcipher *tfm,
+				   const u8 *key, unsigned int keylen,
+				   enum sec_cipher_alg alg)
+{
+	struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct device *dev = ctx->queue->dev_info->dev;
+
+	mutex_lock(&ctx->lock);
+	if (ctx->key) {
+		/* rekeying */
+		memset(ctx->key, 0, SEC_MAX_CIPHER_KEY);
+	} else {
+		/* new key */
+		ctx->key = dma_zalloc_coherent(dev, SEC_MAX_CIPHER_KEY,
+					       &ctx->pkey, GFP_KERNEL);
+		if (!ctx->key) {
+			mutex_unlock(&ctx->lock);
+			return -ENOMEM;
+		}
+	}
+	mutex_unlock(&ctx->lock);
+	sec_alg_skcipher_init_context(tfm, key, keylen, alg);
+
+	return 0;
+}
+
+static int sec_alg_skcipher_setkey_aes_ecb(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	enum sec_cipher_alg alg;
+
+	switch (keylen) {
+	case AES_KEYSIZE_128:
+		alg = SEC_C_AES_ECB_128;
+		break;
+	case AES_KEYSIZE_192:
+		alg = SEC_C_AES_ECB_192;
+		break;
+	case AES_KEYSIZE_256:
+		alg = SEC_C_AES_ECB_256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, alg);
+}
+
+static int sec_alg_skcipher_setkey_aes_cbc(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	enum sec_cipher_alg alg;
+
+	switch (keylen) {
+	case AES_KEYSIZE_128:
+		alg = SEC_C_AES_CBC_128;
+		break;
+	case AES_KEYSIZE_192:
+		alg = SEC_C_AES_CBC_192;
+		break;
+	case AES_KEYSIZE_256:
+		alg = SEC_C_AES_CBC_256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, alg);
+}
+
+static int sec_alg_skcipher_setkey_aes_ctr(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	enum sec_cipher_alg alg;
+
+	switch (keylen) {
+	case AES_KEYSIZE_128:
+		alg = SEC_C_AES_CTR_128;
+		break;
+	case AES_KEYSIZE_192:
+		alg = SEC_C_AES_CTR_192;
+		break;
+	case AES_KEYSIZE_256:
+		alg = SEC_C_AES_CTR_256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, alg);
+}
+
+static int sec_alg_skcipher_setkey_aes_xts(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	enum sec_cipher_alg alg;
+	int ret;
+
+	ret = xts_verify_key(tfm, key, keylen);
+	if (ret)
+		return ret;
+
+	switch (keylen) {
+	case AES_KEYSIZE_128 * 2:
+		alg = SEC_C_AES_XTS_128;
+		break;
+	case AES_KEYSIZE_256 * 2:
+		alg = SEC_C_AES_XTS_256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, alg);
+}
+
+static int sec_alg_skcipher_setkey_des_ecb(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	if (keylen != DES_KEY_SIZE)
+		return -EINVAL;
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, SEC_C_DES_ECB_64);
+}
+
+static int sec_alg_skcipher_setkey_des_cbc(struct crypto_skcipher *tfm,
+					   const u8 *key, unsigned int keylen)
+{
+	if (keylen != DES_KEY_SIZE)
+		return -EINVAL;
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen, SEC_C_DES_CBC_64);
+}
+
+static int sec_alg_skcipher_setkey_3des_ecb(struct crypto_skcipher *tfm,
+					    const u8 *key, unsigned int keylen)
+{
+	if (keylen != DES_KEY_SIZE * 3)
+		return -EINVAL;
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen,
+				       SEC_C_3DES_ECB_192_3KEY);
+}
+
+static int sec_alg_skcipher_setkey_3des_cbc(struct crypto_skcipher *tfm,
+					    const u8 *key, unsigned int keylen)
+{
+	if (keylen != DES3_EDE_KEY_SIZE)
+		return -EINVAL;
+
+	return sec_alg_skcipher_setkey(tfm, key, keylen,
+				       SEC_C_3DES_CBC_192_3KEY);
+}
+
+static void sec_alg_free_el(struct sec_request_el *el,
+			    struct sec_dev_info *info)
+{
+	sec_free_hw_sgl(el->out, el->dma_out, info);
+	sec_free_hw_sgl(el->in, el->dma_in, info);
+	kfree(el->sgl_in);
+	kfree(el->sgl_out);
+	kfree(el);
+}
+
+/* queuelock must be held */
+static int sec_send_request(struct sec_request *sec_req, struct sec_queue *queue)
+{
+	struct sec_request_el *el, *temp;
+	int ret = 0;
+
+	mutex_lock(&sec_req->lock);
+	list_for_each_entry_safe(el, temp, &sec_req->elements, head) {
+		/*
+		 * Add to hardware queue only under following circumstances
+		 * 1) Software and hardware queue empty so no chain dependencies
+		 * 2) No dependencies as new IV - (check software queue empty
+		 *    to maintain order)
+		 * 3) No dependencies because the mode does no chaining.
+		 *
+		 * In other cases first insert onto the software queue which
+		 * is then emptied as requests complete
+		 */
+		if (!queue->havesoftqueue ||
+		    (kfifo_is_empty(&queue->softqueue) &&
+		     sec_queue_empty(queue))) {
+			ret = sec_queue_send(queue, &el->req, sec_req);
+			if (ret == -EAGAIN) {
+				/* Wait unti we can send then try again */
+				/* DEAD if here - should not happen */
+				ret = -EBUSY;
+				goto err_unlock;
+			}
+		} else {
+			kfifo_put(&queue->softqueue, el);
+		}
+	}
+err_unlock:
+	mutex_unlock(&sec_req->lock);
+
+	return ret;
+}
+
+static void sec_skcipher_alg_callback(struct sec_bd_info *sec_resp,
+				      struct crypto_async_request *req_base)
+{
+	struct skcipher_request *skreq = container_of(req_base,
+						      struct skcipher_request,
+						      base);
+	struct sec_request *sec_req = skcipher_request_ctx(skreq);
+	struct sec_request *backlog_req;
+	struct sec_request_el *sec_req_el, *nextrequest;
+	struct sec_alg_tfm_ctx *ctx = sec_req->tfm_ctx;
+	struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(skreq);
+	struct device *dev = ctx->queue->dev_info->dev;
+	int icv_or_skey_en, ret;
+	bool done;
+
+	sec_req_el = list_first_entry(&sec_req->elements, struct sec_request_el,
+				      head);
+	icv_or_skey_en = (sec_resp->w0 & SEC_BD_W0_ICV_OR_SKEY_EN_M) >>
+		SEC_BD_W0_ICV_OR_SKEY_EN_S;
+	if (sec_resp->w1 & SEC_BD_W1_BD_INVALID || icv_or_skey_en == 3) {
+		dev_err(dev, "Got an invalid answer %lu %d\n",
+			sec_resp->w1 & SEC_BD_W1_BD_INVALID,
+			icv_or_skey_en);
+		sec_req->err = -EINVAL;
+		/*
+		 * We need to muddle on to avoid getting stuck with elements
+		 * on the queue. Error will be reported so requester so
+		 * it should be able to handle appropriately.
+		 */
+	}
+
+	mutex_lock(&ctx->queue->queuelock);
+	/* Put the IV in place for chained cases */
+	switch (ctx->cipher_alg) {
+	case SEC_C_AES_CBC_128:
+	case SEC_C_AES_CBC_192:
+	case SEC_C_AES_CBC_256:
+		if (sec_req_el->req.w0 & SEC_BD_W0_DE)
+			sg_pcopy_to_buffer(sec_req_el->sgl_out,
+					   sg_nents(sec_req_el->sgl_out),
+					   skreq->iv,
+					   crypto_skcipher_ivsize(atfm),
+					   sec_req_el->el_length -
+					   crypto_skcipher_ivsize(atfm));
+		else
+			sg_pcopy_to_buffer(sec_req_el->sgl_in,
+					   sg_nents(sec_req_el->sgl_in),
+					   skreq->iv,
+					   crypto_skcipher_ivsize(atfm),
+					   sec_req_el->el_length -
+					   crypto_skcipher_ivsize(atfm));
+		/* No need to sync to the device as coherent DMA */
+		break;
+	case SEC_C_AES_CTR_128:
+	case SEC_C_AES_CTR_192:
+	case SEC_C_AES_CTR_256:
+		crypto_inc(skreq->iv, 16);
+		break;
+	default:
+		/* Do not update */
+		break;
+	}
+
+	if (ctx->queue->havesoftqueue &&
+	    !kfifo_is_empty(&ctx->queue->softqueue) &&
+	    sec_queue_empty(ctx->queue)) {
+		ret = kfifo_get(&ctx->queue->softqueue, &nextrequest);
+		if (ret <= 0)
+			dev_err(dev,
+				"Error getting next element from kfifo %d\n",
+				ret);
+		else
+			/* We know there is space so this cannot fail */
+			sec_queue_send(ctx->queue, &nextrequest->req,
+				       nextrequest->sec_req);
+	} else if (!list_empty(&ctx->backlog)) {
+		/* Need to verify there is room first */
+		backlog_req = list_first_entry(&ctx->backlog,
+					       typeof(*backlog_req),
+					       backlog_head);
+		if (sec_queue_can_enqueue(ctx->queue,
+		    backlog_req->num_elements) ||
+		    (ctx->queue->havesoftqueue &&
+		     kfifo_avail(&ctx->queue->softqueue) >
+		     backlog_req->num_elements)) {
+			sec_send_request(backlog_req, ctx->queue);
+			backlog_req->req_base->complete(backlog_req->req_base,
+							-EINPROGRESS);
+			list_del(&backlog_req->backlog_head);
+		}
+	}
+	mutex_unlock(&ctx->queue->queuelock);
+
+	mutex_lock(&sec_req->lock);
+	list_del(&sec_req_el->head);
+	mutex_unlock(&sec_req->lock);
+	sec_alg_free_el(sec_req_el, ctx->queue->dev_info);
+
+	/*
+	 * Request is done.
+	 * The dance is needed as the lock is freed in the completion
+	 */
+	mutex_lock(&sec_req->lock);
+	done = list_empty(&sec_req->elements);
+	mutex_unlock(&sec_req->lock);
+	if (done) {
+		if (crypto_skcipher_ivsize(atfm)) {
+			dma_unmap_single(dev, sec_req->dma_iv,
+					 crypto_skcipher_ivsize(atfm),
+					 DMA_TO_DEVICE);
+		}
+		dma_unmap_sg(dev, skreq->src, sec_req->len_in,
+			     DMA_BIDIRECTIONAL);
+		if (skreq->src != skreq->dst)
+			dma_unmap_sg(dev, skreq->dst, sec_req->len_out,
+				     DMA_BIDIRECTIONAL);
+		skreq->base.complete(&skreq->base, sec_req->err);
+	}
+}
+
+void sec_alg_callback(struct sec_bd_info *resp, void *shadow)
+{
+	struct sec_request *sec_req = shadow;
+
+	sec_req->cb(resp, sec_req->req_base);
+}
+
+static int sec_alg_alloc_and_calc_split_sizes(int length, size_t **split_sizes,
+					      int *steps, gfp_t gfp)
+{
+	size_t *sizes;
+	int i;
+
+	/* Split into suitable sized blocks */
+	*steps = roundup(length, SEC_REQ_LIMIT) / SEC_REQ_LIMIT;
+	sizes = kcalloc(*steps, sizeof(*sizes), gfp);
+	if (!sizes)
+		return -ENOMEM;
+
+	for (i = 0; i < *steps - 1; i++)
+		sizes[i] = SEC_REQ_LIMIT;
+	sizes[*steps - 1] = length - SEC_REQ_LIMIT * (*steps - 1);
+	*split_sizes = sizes;
+
+	return 0;
+}
+
+static int sec_map_and_split_sg(struct scatterlist *sgl, size_t *split_sizes,
+				int steps, struct scatterlist ***splits,
+				int **splits_nents,
+				int sgl_len_in,
+				struct device *dev, gfp_t gfp)
+{
+	int ret, count;
+
+	count = dma_map_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL);
+	if (!count)
+		return -EINVAL;
+
+	*splits = kcalloc(steps, sizeof(struct scatterlist *), gfp);
+	if (!*splits) {
+		ret = -ENOMEM;
+		goto err_unmap_sg;
+	}
+	*splits_nents = kcalloc(steps, sizeof(int), gfp);
+	if (!*splits_nents) {
+		ret = -ENOMEM;
+		goto err_free_splits;
+	}
+
+	/* output the scatter list before and after this */
+	ret = sg_split(sgl, count, 0, steps, split_sizes,
+		       *splits, *splits_nents, gfp);
+	if (ret) {
+		ret = -ENOMEM;
+		goto err_free_splits_nents;
+	}
+
+	return 0;
+
+err_free_splits_nents:
+	kfree(*splits_nents);
+err_free_splits:
+	kfree(*splits);
+err_unmap_sg:
+	dma_unmap_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL);
+
+	return ret;
+}
+
+/*
+ * Reverses the sec_map_and_split_sg call for messages not yet added to
+ * the queues.
+ */
+static void sec_unmap_sg_on_err(struct scatterlist *sgl, int steps,
+				struct scatterlist **splits, int *splits_nents,
+				int sgl_len_in, struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < steps; i++)
+		kfree(splits[i]);
+	kfree(splits_nents);
+	kfree(splits);
+
+	dma_unmap_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL);
+}
+
+static struct sec_request_el
+*sec_alg_alloc_and_fill_el(struct sec_bd_info *template, int encrypt,
+			   int el_size, bool different_dest,
+			   struct scatterlist *sgl_in, int n_ents_in,
+			   struct scatterlist *sgl_out, int n_ents_out,
+			   struct sec_dev_info *info, gfp_t gfp)
+{
+	struct sec_request_el *el;
+	struct sec_bd_info *req;
+	int ret;
+
+	el = kzalloc(sizeof(*el), gfp);
+	if (!el)
+		return ERR_PTR(-ENOMEM);
+	el->el_length = el_size;
+	req = &el->req;
+	memcpy(req, template, sizeof(*req));
+
+	req->w0 &= ~SEC_BD_W0_CIPHER_M;
+	if (encrypt)
+		req->w0 |= SEC_CIPHER_ENCRYPT << SEC_BD_W0_CIPHER_S;
+	else
+		req->w0 |= SEC_CIPHER_DECRYPT << SEC_BD_W0_CIPHER_S;
+
+	req->w0 &= ~SEC_BD_W0_C_GRAN_SIZE_19_16_M;
+	req->w0 |= ((el_size >> 16) << SEC_BD_W0_C_GRAN_SIZE_19_16_S) &
+		SEC_BD_W0_C_GRAN_SIZE_19_16_M;
+
+	req->w0 &= ~SEC_BD_W0_C_GRAN_SIZE_21_20_M;
+	req->w0 |= ((el_size >> 20) << SEC_BD_W0_C_GRAN_SIZE_21_20_S) &
+		SEC_BD_W0_C_GRAN_SIZE_21_20_M;
+
+	/* Writing whole u32 so no need to take care of masking */
+	req->w2 = ((1 << SEC_BD_W2_GRAN_NUM_S) & SEC_BD_W2_GRAN_NUM_M) |
+		((el_size << SEC_BD_W2_C_GRAN_SIZE_15_0_S) &
+		 SEC_BD_W2_C_GRAN_SIZE_15_0_M);
+
+	req->w3 &= ~SEC_BD_W3_CIPHER_LEN_OFFSET_M;
+	req->w1 |= SEC_BD_W1_ADDR_TYPE;
+
+	el->sgl_in = sgl_in;
+
+	ret = sec_alloc_and_fill_hw_sgl(&el->in, &el->dma_in, el->sgl_in,
+					n_ents_in, info, gfp);
+	if (ret)
+		goto err_free_el;
+
+	req->data_addr_lo = lower_32_bits(el->dma_in);
+	req->data_addr_hi = upper_32_bits(el->dma_in);
+
+	if (different_dest) {
+		el->sgl_out = sgl_out;
+		ret = sec_alloc_and_fill_hw_sgl(&el->out, &el->dma_out,
+						el->sgl_out,
+						n_ents_out, info, gfp);
+		if (ret)
+			goto err_free_hw_sgl_in;
+
+		req->w0 |= SEC_BD_W0_DE;
+		req->cipher_destin_addr_lo = lower_32_bits(el->dma_out);
+		req->cipher_destin_addr_hi = upper_32_bits(el->dma_out);
+
+	} else {
+		req->w0 &= ~SEC_BD_W0_DE;
+		req->cipher_destin_addr_lo = lower_32_bits(el->dma_in);
+		req->cipher_destin_addr_hi = upper_32_bits(el->dma_in);
+	}
+
+	return el;
+
+err_free_hw_sgl_in:
+	sec_free_hw_sgl(el->in, el->dma_in, info);
+err_free_el:
+	kfree(el);
+
+	return ERR_PTR(ret);
+}
+
+static int sec_alg_skcipher_crypto(struct skcipher_request *skreq,
+				   bool encrypt)
+{
+	struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(skreq);
+	struct crypto_tfm *tfm = crypto_skcipher_tfm(atfm);
+	struct sec_alg_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct sec_queue *queue = ctx->queue;
+	struct sec_request *sec_req = skcipher_request_ctx(skreq);
+	struct sec_dev_info *info = queue->dev_info;
+	int i, ret, steps;
+	size_t *split_sizes;
+	struct scatterlist **splits_in;
+	struct scatterlist **splits_out = NULL;
+	int *splits_in_nents;
+	int *splits_out_nents = NULL;
+	struct sec_request_el *el, *temp;
+	bool split = skreq->src != skreq->dst;
+	gfp_t gfp = skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
+
+	mutex_init(&sec_req->lock);
+	sec_req->req_base = &skreq->base;
+	sec_req->err = 0;
+	/* SGL mapping out here to allow us to break it up as necessary */
+	sec_req->len_in = sg_nents(skreq->src);
+
+	ret = sec_alg_alloc_and_calc_split_sizes(skreq->cryptlen, &split_sizes,
+						 &steps, gfp);
+	if (ret)
+		return ret;
+	sec_req->num_elements = steps;
+	ret = sec_map_and_split_sg(skreq->src, split_sizes, steps, &splits_in,
+				   &splits_in_nents, sec_req->len_in,
+				   info->dev, gfp);
+	if (ret)
+		goto err_free_split_sizes;
+
+	if (split) {
+		sec_req->len_out = sg_nents(skreq->dst);
+		ret = sec_map_and_split_sg(skreq->dst, split_sizes, steps,
+					   &splits_out, &splits_out_nents,
+					   sec_req->len_out, info->dev, gfp);
+		if (ret)
+			goto err_unmap_in_sg;
+	}
+	/* Shared info stored in seq_req - applies to all BDs */
+	sec_req->tfm_ctx = ctx;
+	sec_req->cb = sec_skcipher_alg_callback;
+	INIT_LIST_HEAD(&sec_req->elements);
+
+	/*
+	 * Future optimization.
+	 * In the chaining case we can't use a dma pool bounce buffer
+	 * but in the case where we know there is no chaining we can
+	 */
+	if (crypto_skcipher_ivsize(atfm)) {
+		sec_req->dma_iv = dma_map_single(info->dev, skreq->iv,
+						 crypto_skcipher_ivsize(atfm),
+						 DMA_TO_DEVICE);
+		if (dma_mapping_error(info->dev, sec_req->dma_iv)) {
+			ret = -ENOMEM;
+			goto err_unmap_out_sg;
+		}
+	}
+
+	/* Set them all up then queue - cleaner error handling. */
+	for (i = 0; i < steps; i++) {
+		el = sec_alg_alloc_and_fill_el(&ctx->req_template,
+					       encrypt ? 1 : 0,
+					       split_sizes[i],
+					       skreq->src != skreq->dst,
+					       splits_in[i], splits_in_nents[i],
+					       split ? splits_out[i] : NULL,
+					       split ? splits_out_nents[i] : 0,
+					       info, gfp);
+		if (IS_ERR(el)) {
+			ret = PTR_ERR(el);
+			goto err_free_elements;
+		}
+		el->req.cipher_iv_addr_lo = lower_32_bits(sec_req->dma_iv);
+		el->req.cipher_iv_addr_hi = upper_32_bits(sec_req->dma_iv);
+		el->sec_req = sec_req;
+		list_add_tail(&el->head, &sec_req->elements);
+	}
+
+	/*
+	 * Only attempt to queue if the whole lot can fit in the queue -
+	 * we can't successfully cleanup after a partial queing so this
+	 * must succeed or fail atomically.
+	 *
+	 * Big hammer test of both software and hardware queues - could be
+	 * more refined but this is unlikely to happen so no need.
+	 */
+
+	/* Grab a big lock for a long time to avoid concurrency issues */
+	mutex_lock(&queue->queuelock);
+
+	/*
+	 * Can go on to queue if we have space in either:
+	 * 1) The hardware queue and no software queue
+	 * 2) The software queue
+	 * AND there is nothing in the backlog.  If there is backlog we
+	 * have to only queue to the backlog queue and return busy.
+	 */
+	if ((!sec_queue_can_enqueue(queue, steps) &&
+	     (!queue->havesoftqueue ||
+	      kfifo_avail(&queue->softqueue) > steps)) ||
+	    !list_empty(&ctx->backlog)) {
+		ret = -EBUSY;
+		if ((skreq->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
+			list_add_tail(&sec_req->backlog_head, &ctx->backlog);
+			mutex_unlock(&queue->queuelock);
+			goto out;
+		}
+
+		mutex_unlock(&queue->queuelock);
+		goto err_free_elements;
+	}
+	ret = sec_send_request(sec_req, queue);
+	mutex_unlock(&queue->queuelock);
+	if (ret)
+		goto err_free_elements;
+
+	ret = -EINPROGRESS;
+out:
+	/* Cleanup - all elements in pointer arrays have been copied */
+	kfree(splits_in_nents);
+	kfree(splits_in);
+	kfree(splits_out_nents);
+	kfree(splits_out);
+	kfree(split_sizes);
+	return ret;
+
+err_free_elements:
+	list_for_each_entry_safe(el, temp, &sec_req->elements, head) {
+		list_del(&el->head);
+		sec_alg_free_el(el, info);
+	}
+	if (crypto_skcipher_ivsize(atfm))
+		dma_unmap_single(info->dev, sec_req->dma_iv,
+				 crypto_skcipher_ivsize(atfm),
+				 DMA_BIDIRECTIONAL);
+err_unmap_out_sg:
+	if (split)
+		sec_unmap_sg_on_err(skreq->dst, steps, splits_out,
+				    splits_out_nents, sec_req->len_out,
+				    info->dev);
+err_unmap_in_sg:
+	sec_unmap_sg_on_err(skreq->src, steps, splits_in, splits_in_nents,
+			    sec_req->len_in, info->dev);
+err_free_split_sizes:
+	kfree(split_sizes);
+
+	return ret;
+}
+
+static int sec_alg_skcipher_encrypt(struct skcipher_request *req)
+{
+	return sec_alg_skcipher_crypto(req, true);
+}
+
+static int sec_alg_skcipher_decrypt(struct skcipher_request *req)
+{
+	return sec_alg_skcipher_crypto(req, false);
+}
+
+static int sec_alg_skcipher_init(struct crypto_skcipher *tfm)
+{
+	struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	mutex_init(&ctx->lock);
+	INIT_LIST_HEAD(&ctx->backlog);
+	crypto_skcipher_set_reqsize(tfm, sizeof(struct sec_request));
+
+	ctx->queue = sec_queue_alloc_start_safe();
+	if (IS_ERR(ctx->queue))
+		return PTR_ERR(ctx->queue);
+
+	mutex_init(&ctx->queue->queuelock);
+	ctx->queue->havesoftqueue = false;
+
+	return 0;
+}
+
+static void sec_alg_skcipher_exit(struct crypto_skcipher *tfm)
+{
+	struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct device *dev = ctx->queue->dev_info->dev;
+
+	if (ctx->key) {
+		memzero_explicit(ctx->key, SEC_MAX_CIPHER_KEY);
+		dma_free_coherent(dev, SEC_MAX_CIPHER_KEY, ctx->key,
+				  ctx->pkey);
+	}
+	sec_queue_stop_release(ctx->queue);
+}
+
+static int sec_alg_skcipher_init_with_queue(struct crypto_skcipher *tfm)
+{
+	struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int ret;
+
+	ret = sec_alg_skcipher_init(tfm);
+	if (ret)
+		return ret;
+
+	INIT_KFIFO(ctx->queue->softqueue);
+	ret = kfifo_alloc(&ctx->queue->softqueue, 512, GFP_KERNEL);
+	if (ret) {
+		sec_alg_skcipher_exit(tfm);
+		return ret;
+	}
+	ctx->queue->havesoftqueue = true;
+
+	return 0;
+}
+
+static void sec_alg_skcipher_exit_with_queue(struct crypto_skcipher *tfm)
+{
+	struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	kfifo_free(&ctx->queue->softqueue);
+	sec_alg_skcipher_exit(tfm);
+}
+
+static struct skcipher_alg sec_algs[] = {
+	{
+		.base = {
+			.cra_name = "ecb(aes)",
+			.cra_driver_name = "hisi_sec_aes_ecb",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init,
+		.exit = sec_alg_skcipher_exit,
+		.setkey = sec_alg_skcipher_setkey_aes_ecb,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize = 0,
+	}, {
+		.base = {
+			.cra_name = "cbc(aes)",
+			.cra_driver_name = "hisi_sec_aes_cbc",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init_with_queue,
+		.exit = sec_alg_skcipher_exit_with_queue,
+		.setkey = sec_alg_skcipher_setkey_aes_cbc,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize = AES_BLOCK_SIZE,
+	}, {
+		.base = {
+			.cra_name = "ctr(aes)",
+			.cra_driver_name = "hisi_sec_aes_ctr",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init_with_queue,
+		.exit = sec_alg_skcipher_exit_with_queue,
+		.setkey = sec_alg_skcipher_setkey_aes_ctr,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize = AES_BLOCK_SIZE,
+	}, {
+		.base = {
+			.cra_name = "xts(aes)",
+			.cra_driver_name = "hisi_sec_aes_xts",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init,
+		.exit = sec_alg_skcipher_exit,
+		.setkey = sec_alg_skcipher_setkey_aes_xts,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = 2 * AES_MIN_KEY_SIZE,
+		.max_keysize = 2 * AES_MAX_KEY_SIZE,
+		.ivsize = AES_BLOCK_SIZE,
+	}, {
+	/* Unable to find any test vectors so untested */
+		.base = {
+			.cra_name = "ecb(des)",
+			.cra_driver_name = "hisi_sec_des_ecb",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = DES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init,
+		.exit = sec_alg_skcipher_exit,
+		.setkey = sec_alg_skcipher_setkey_des_ecb,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = DES_KEY_SIZE,
+		.max_keysize = DES_KEY_SIZE,
+		.ivsize = 0,
+	}, {
+		.base = {
+			.cra_name = "cbc(des)",
+			.cra_driver_name = "hisi_sec_des_cbc",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = DES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init_with_queue,
+		.exit = sec_alg_skcipher_exit_with_queue,
+		.setkey = sec_alg_skcipher_setkey_des_cbc,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = DES_KEY_SIZE,
+		.max_keysize = DES_KEY_SIZE,
+		.ivsize = DES_BLOCK_SIZE,
+	}, {
+		.base = {
+			.cra_name = "cbc(des3_ede)",
+			.cra_driver_name = "hisi_sec_3des_cbc",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = DES3_EDE_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init_with_queue,
+		.exit = sec_alg_skcipher_exit_with_queue,
+		.setkey = sec_alg_skcipher_setkey_3des_cbc,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = DES3_EDE_KEY_SIZE,
+		.max_keysize = DES3_EDE_KEY_SIZE,
+		.ivsize = DES3_EDE_BLOCK_SIZE,
+	}, {
+		.base = {
+			.cra_name = "ecb(des3_ede)",
+			.cra_driver_name = "hisi_sec_3des_ecb",
+			.cra_priority = 4001,
+			.cra_flags = CRYPTO_ALG_ASYNC,
+			.cra_blocksize = DES3_EDE_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct sec_alg_tfm_ctx),
+			.cra_alignmask = 0,
+			.cra_module = THIS_MODULE,
+		},
+		.init = sec_alg_skcipher_init,
+		.exit = sec_alg_skcipher_exit,
+		.setkey = sec_alg_skcipher_setkey_3des_ecb,
+		.decrypt = sec_alg_skcipher_decrypt,
+		.encrypt = sec_alg_skcipher_encrypt,
+		.min_keysize = DES3_EDE_KEY_SIZE,
+		.max_keysize = DES3_EDE_KEY_SIZE,
+		.ivsize = 0,
+	}
+};
+
+int sec_algs_register(void)
+{
+	int ret = 0;
+
+	mutex_lock(&algs_lock);
+	if (++active_devs != 1)
+		goto unlock;
+
+	ret = crypto_register_skciphers(sec_algs, ARRAY_SIZE(sec_algs));
+	if (ret)
+		--active_devs;
+unlock:
+	mutex_unlock(&algs_lock);
+
+	return ret;
+}
+
+void sec_algs_unregister(void)
+{
+	mutex_lock(&algs_lock);
+	if (--active_devs != 0)
+		goto unlock;
+	crypto_unregister_skciphers(sec_algs, ARRAY_SIZE(sec_algs));
+
+unlock:
+	mutex_unlock(&algs_lock);
+}