[linux-block.git] / drivers / crypto / allwinner / sun8i-ce / sun8i-ce-cipher.c

// SPDX-License-Identifier: GPL-2.0
/*
 * sun8i-ce-cipher.c - hardware cryptographic offloader for
 * Allwinner H3/A64/H5/H2+/H6/R40 SoC
 *
 * Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com>
 *
 * This file add support for AES cipher with 128,192,256 bits keysize in
 * CBC and ECB mode.
 *
 * You could find a link for the datasheet in Documentation/arch/arm/sunxi.rst
 */

#include <linux/bottom_half.h>
#include <linux/crypto.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <crypto/scatterwalk.h>
#include <crypto/internal/des.h>
#include <crypto/internal/skcipher.h>
#include "sun8i-ce.h"

static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct scatterlist *sg;
	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
	struct sun8i_ce_alg_template *algt;
	unsigned int todo, len;

	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);

	if (sg_nents_for_len(areq->src, areq->cryptlen) > MAX_SG ||
	    sg_nents_for_len(areq->dst, areq->cryptlen) > MAX_SG) {
		algt->stat_fb_maxsg++;
		return true;
	}

	if (areq->cryptlen < crypto_skcipher_ivsize(tfm)) {
		algt->stat_fb_leniv++;
		return true;
	}

	if (areq->cryptlen == 0) {
		algt->stat_fb_len0++;
		return true;
	}

	if (areq->cryptlen % 16) {
		algt->stat_fb_mod16++;
		return true;
	}

	len = areq->cryptlen;
	sg = areq->src;
	while (sg) {
		if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
			algt->stat_fb_srcali++;
			return true;
		}
		todo = min(len, sg->length);
		if (todo % 4) {
			algt->stat_fb_srclen++;
			return true;
		}
		len -= todo;
		sg = sg_next(sg);
	}

	len = areq->cryptlen;
	sg = areq->dst;
	while (sg) {
		if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
			algt->stat_fb_dstali++;
			return true;
		}
		todo = min(len, sg->length);
		if (todo % 4) {
			algt->stat_fb_dstlen++;
			return true;
		}
		len -= todo;
		sg = sg_next(sg);
	}
	return false;
}

static int sun8i_ce_cipher_fallback(struct skcipher_request *areq)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	int err;

	if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG)) {
		struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
		struct sun8i_ce_alg_template *algt __maybe_unused;

		algt = container_of(alg, struct sun8i_ce_alg_template,
				    alg.skcipher.base);

#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
		algt->stat_fb++;
#endif
	}

	skcipher_request_set_tfm(&rctx->fallback_req, op->fallback_tfm);
	skcipher_request_set_callback(&rctx->fallback_req, areq->base.flags,
				      areq->base.complete, areq->base.data);
	skcipher_request_set_crypt(&rctx->fallback_req, areq->src, areq->dst,
				   areq->cryptlen, areq->iv);
	if (rctx->op_dir & CE_DECRYPTION)
		err = crypto_skcipher_decrypt(&rctx->fallback_req);
	else
		err = crypto_skcipher_encrypt(&rctx->fallback_req);
	return err;
}

static int sun8i_ce_cipher_prepare(struct crypto_engine *engine, void *async_req)
{
	struct skcipher_request *areq = container_of(async_req, struct skcipher_request, base);
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_ce_dev *ce = op->ce;
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
	struct sun8i_ce_alg_template *algt;
	struct sun8i_ce_flow *chan;
	struct ce_task *cet;
	struct scatterlist *sg;
	unsigned int todo, len, offset, ivsize;
	u32 common, sym;
	int flow, i;
	int nr_sgs = 0;
	int nr_sgd = 0;
	int err = 0;
	int ns = sg_nents_for_len(areq->src, areq->cryptlen);
	int nd = sg_nents_for_len(areq->dst, areq->cryptlen);

	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);

	dev_dbg(ce->dev, "%s %s %u %x IV(%p %u) key=%u\n", __func__,
		crypto_tfm_alg_name(areq->base.tfm),
		areq->cryptlen,
		rctx->op_dir, areq->iv, crypto_skcipher_ivsize(tfm),
		op->keylen);

#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
	algt->stat_req++;
#endif

	flow = rctx->flow;

	chan = &ce->chanlist[flow];

	cet = chan->tl;
	memset(cet, 0, sizeof(struct ce_task));

	cet->t_id = cpu_to_le32(flow);
	common = ce->variant->alg_cipher[algt->ce_algo_id];
	common |= rctx->op_dir | CE_COMM_INT;
	cet->t_common_ctl = cpu_to_le32(common);
	/* CTS and recent CE (H6) need length in bytes, in word otherwise */
	if (ce->variant->cipher_t_dlen_in_bytes)
		cet->t_dlen = cpu_to_le32(areq->cryptlen);
	else
		cet->t_dlen = cpu_to_le32(areq->cryptlen / 4);

	sym = ce->variant->op_mode[algt->ce_blockmode];
	len = op->keylen;
	switch (len) {
	case 128 / 8:
		sym |= CE_AES_128BITS;
		break;
	case 192 / 8:
		sym |= CE_AES_192BITS;
		break;
	case 256 / 8:
		sym |= CE_AES_256BITS;
		break;
	}

	cet->t_sym_ctl = cpu_to_le32(sym);
	cet->t_asym_ctl = 0;

	rctx->addr_key = dma_map_single(ce->dev, op->key, op->keylen, DMA_TO_DEVICE);
	if (dma_mapping_error(ce->dev, rctx->addr_key)) {
		dev_err(ce->dev, "Cannot DMA MAP KEY\n");
		err = -EFAULT;
		goto theend;
	}
	cet->t_key = cpu_to_le32(rctx->addr_key);

	ivsize = crypto_skcipher_ivsize(tfm);
	if (areq->iv && crypto_skcipher_ivsize(tfm) > 0) {
		rctx->ivlen = ivsize;
		if (rctx->op_dir & CE_DECRYPTION) {
			offset = areq->cryptlen - ivsize;
			scatterwalk_map_and_copy(chan->backup_iv, areq->src,
						 offset, ivsize, 0);
		}
		memcpy(chan->bounce_iv, areq->iv, ivsize);
		rctx->addr_iv = dma_map_single(ce->dev, chan->bounce_iv, rctx->ivlen,
					       DMA_TO_DEVICE);
		if (dma_mapping_error(ce->dev, rctx->addr_iv)) {
			dev_err(ce->dev, "Cannot DMA MAP IV\n");
			err = -ENOMEM;
			goto theend_iv;
		}
		cet->t_iv = cpu_to_le32(rctx->addr_iv);
	}

	if (areq->src == areq->dst) {
		nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_BIDIRECTIONAL);
		if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
			dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
			err = -EINVAL;
			goto theend_iv;
		}
		nr_sgd = nr_sgs;
	} else {
		nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
		if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
			dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
			err = -EINVAL;
			goto theend_iv;
		}
		nr_sgd = dma_map_sg(ce->dev, areq->dst, nd, DMA_FROM_DEVICE);
		if (nr_sgd <= 0 || nr_sgd > MAX_SG) {
			dev_err(ce->dev, "Invalid sg number %d\n", nr_sgd);
			err = -EINVAL;
			goto theend_sgs;
		}
	}

	len = areq->cryptlen;
	for_each_sg(areq->src, sg, nr_sgs, i) {
		cet->t_src[i].addr = cpu_to_le32(sg_dma_address(sg));
		todo = min(len, sg_dma_len(sg));
		cet->t_src[i].len = cpu_to_le32(todo / 4);
		dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
			areq->cryptlen, i, cet->t_src[i].len, sg->offset, todo);
		len -= todo;
	}
	if (len > 0) {
		dev_err(ce->dev, "remaining len %d\n", len);
		err = -EINVAL;
		goto theend_sgs;
	}

	len = areq->cryptlen;
	for_each_sg(areq->dst, sg, nr_sgd, i) {
		cet->t_dst[i].addr = cpu_to_le32(sg_dma_address(sg));
		todo = min(len, sg_dma_len(sg));
		cet->t_dst[i].len = cpu_to_le32(todo / 4);
		dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
			areq->cryptlen, i, cet->t_dst[i].len, sg->offset, todo);
		len -= todo;
	}
	if (len > 0) {
		dev_err(ce->dev, "remaining len %d\n", len);
		err = -EINVAL;
		goto theend_sgs;
	}

	chan->timeout = areq->cryptlen;
	rctx->nr_sgs = nr_sgs;
	rctx->nr_sgd = nr_sgd;
	return 0;

theend_sgs:
	if (areq->src == areq->dst) {
		dma_unmap_sg(ce->dev, areq->src, ns, DMA_BIDIRECTIONAL);
	} else {
		if (nr_sgs > 0)
			dma_unmap_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
		dma_unmap_sg(ce->dev, areq->dst, nd, DMA_FROM_DEVICE);
	}

theend_iv:
	if (areq->iv && ivsize > 0) {
		if (rctx->addr_iv)
			dma_unmap_single(ce->dev, rctx->addr_iv, rctx->ivlen, DMA_TO_DEVICE);
		offset = areq->cryptlen - ivsize;
		if (rctx->op_dir & CE_DECRYPTION) {
			memcpy(areq->iv, chan->backup_iv, ivsize);
			memzero_explicit(chan->backup_iv, ivsize);
		} else {
			scatterwalk_map_and_copy(areq->iv, areq->dst, offset,
						 ivsize, 0);
		}
		memzero_explicit(chan->bounce_iv, ivsize);
	}

	dma_unmap_single(ce->dev, rctx->addr_key, op->keylen, DMA_TO_DEVICE);

theend:
	return err;
}

static void sun8i_ce_cipher_unprepare(struct crypto_engine *engine,
				      void *async_req)
{
	struct skcipher_request *areq = container_of(async_req, struct skcipher_request, base);
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_ce_dev *ce = op->ce;
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	struct sun8i_ce_flow *chan;
	struct ce_task *cet;
	unsigned int ivsize, offset;
	int nr_sgs = rctx->nr_sgs;
	int nr_sgd = rctx->nr_sgd;
	int flow;

	flow = rctx->flow;
	chan = &ce->chanlist[flow];
	cet = chan->tl;
	ivsize = crypto_skcipher_ivsize(tfm);

	if (areq->src == areq->dst) {
		dma_unmap_sg(ce->dev, areq->src, nr_sgs, DMA_BIDIRECTIONAL);
	} else {
		if (nr_sgs > 0)
			dma_unmap_sg(ce->dev, areq->src, nr_sgs, DMA_TO_DEVICE);
		dma_unmap_sg(ce->dev, areq->dst, nr_sgd, DMA_FROM_DEVICE);
	}

	if (areq->iv && ivsize > 0) {
		if (cet->t_iv)
			dma_unmap_single(ce->dev, rctx->addr_iv, rctx->ivlen, DMA_TO_DEVICE);
		offset = areq->cryptlen - ivsize;
		if (rctx->op_dir & CE_DECRYPTION) {
			memcpy(areq->iv, chan->backup_iv, ivsize);
			memzero_explicit(chan->backup_iv, ivsize);
		} else {
			scatterwalk_map_and_copy(areq->iv, areq->dst, offset,
						 ivsize, 0);
		}
		memzero_explicit(chan->bounce_iv, ivsize);
	}

	dma_unmap_single(ce->dev, rctx->addr_key, op->keylen, DMA_TO_DEVICE);
}

static void sun8i_ce_cipher_run(struct crypto_engine *engine, void *areq)
{
	struct skcipher_request *breq = container_of(areq, struct skcipher_request, base);
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(breq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_ce_dev *ce = op->ce;
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(breq);
	int flow, err;

	flow = rctx->flow;
	err = sun8i_ce_run_task(ce, flow, crypto_tfm_alg_name(breq->base.tfm));
	sun8i_ce_cipher_unprepare(engine, areq);
	local_bh_disable();
	crypto_finalize_skcipher_request(engine, breq, err);
	local_bh_enable();
}

int sun8i_ce_cipher_do_one(struct crypto_engine *engine, void *areq)
{
	int err = sun8i_ce_cipher_prepare(engine, areq);

	if (err)
		return err;

	sun8i_ce_cipher_run(engine, areq);
	return 0;
}

int sun8i_ce_skdecrypt(struct skcipher_request *areq)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	struct crypto_engine *engine;
	int e;

	rctx->op_dir = CE_DECRYPTION;
	if (sun8i_ce_cipher_need_fallback(areq))
		return sun8i_ce_cipher_fallback(areq);

	e = sun8i_ce_get_engine_number(op->ce);
	rctx->flow = e;
	engine = op->ce->chanlist[e].engine;

	return crypto_transfer_skcipher_request_to_engine(engine, areq);
}

int sun8i_ce_skencrypt(struct skcipher_request *areq)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	struct crypto_engine *engine;
	int e;

	rctx->op_dir = CE_ENCRYPTION;
	if (sun8i_ce_cipher_need_fallback(areq))
		return sun8i_ce_cipher_fallback(areq);

	e = sun8i_ce_get_engine_number(op->ce);
	rctx->flow = e;
	engine = op->ce->chanlist[e].engine;

	return crypto_transfer_skcipher_request_to_engine(engine, areq);
}

int sun8i_ce_cipher_init(struct crypto_tfm *tfm)
{
	struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
	struct sun8i_ce_alg_template *algt;
	const char *name = crypto_tfm_alg_name(tfm);
	struct crypto_skcipher *sktfm = __crypto_skcipher_cast(tfm);
	struct skcipher_alg *alg = crypto_skcipher_alg(sktfm);
	int err;

	memset(op, 0, sizeof(struct sun8i_cipher_tfm_ctx));

	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);
	op->ce = algt->ce;

	op->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(op->fallback_tfm)) {
		dev_err(op->ce->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
			name, PTR_ERR(op->fallback_tfm));
		return PTR_ERR(op->fallback_tfm);
	}

	crypto_skcipher_set_reqsize(sktfm, sizeof(struct sun8i_cipher_req_ctx) +
				    crypto_skcipher_reqsize(op->fallback_tfm));

	memcpy(algt->fbname,
	       crypto_tfm_alg_driver_name(crypto_skcipher_tfm(op->fallback_tfm)),
	       CRYPTO_MAX_ALG_NAME);

	err = pm_runtime_get_sync(op->ce->dev);
	if (err < 0)
		goto error_pm;

	return 0;
error_pm:
	pm_runtime_put_noidle(op->ce->dev);
	crypto_free_skcipher(op->fallback_tfm);
	return err;
}

void sun8i_ce_cipher_exit(struct crypto_tfm *tfm)
{
	struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);

	kfree_sensitive(op->key);
	crypto_free_skcipher(op->fallback_tfm);
	pm_runtime_put_sync_suspend(op->ce->dev);
}

int sun8i_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
			unsigned int keylen)
{
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	struct sun8i_ce_dev *ce = op->ce;

	switch (keylen) {
	case 128 / 8:
		break;
	case 192 / 8:
		break;
	case 256 / 8:
		break;
	default:
		dev_dbg(ce->dev, "ERROR: Invalid keylen %u\n", keylen);
		return -EINVAL;
	}
	kfree_sensitive(op->key);
	op->keylen = keylen;
	op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA);
	if (!op->key)
		return -ENOMEM;

	crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
	crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);

	return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
}

int sun8i_ce_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
			 unsigned int keylen)
{
	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	int err;

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

	kfree_sensitive(op->key);
	op->keylen = keylen;
	op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA);
	if (!op->key)
		return -ENOMEM;

	crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
	crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);

	return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
}
Commit	Line	Data
06f751b6 CL	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* sun8i-ce-cipher.c - hardware cryptographic offloader for
	4	* Allwinner H3/A64/H5/H2+/H6/R40 SoC
	5	*
	6	* Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com>
	7	*
	8	* This file add support for AES cipher with 128,192,256 bits keysize in
	9	* CBC and ECB mode.
	10	*
39db3f15	11	* You could find a link for the datasheet in Documentation/arch/arm/sunxi.rst
06f751b6 CL	12	*/
06f751b6 CL	13
f75a749b	14	#include <linux/bottom_half.h>
06f751b6 CL	15	#include <linux/crypto.h>
	16	#include <linux/dma-mapping.h>
	17	#include <linux/io.h>
	18	#include <linux/pm_runtime.h>
	19	#include <crypto/scatterwalk.h>
	20	#include <crypto/internal/des.h>
	21	#include <crypto/internal/skcipher.h>
	22	#include "sun8i-ce.h"
	23
	24	static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
	25	{
	26	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	27	struct scatterlist *sg;
aff388f7 CL	28	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
aff388f7 CL	29	struct sun8i_ce_alg_template *algt;
42a01af3	30	unsigned int todo, len;
aff388f7	31
07e34cd3	32	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);
06f751b6	33
6b8309fa	34	if (sg_nents_for_len(areq->src, areq->cryptlen) > MAX_SG \|\|
aff388f7 CL	35	sg_nents_for_len(areq->dst, areq->cryptlen) > MAX_SG) {
aff388f7 CL	36	algt->stat_fb_maxsg++;
06f751b6	37	return true;
aff388f7 CL	38	}
	39
	40	if (areq->cryptlen < crypto_skcipher_ivsize(tfm)) {
	41	algt->stat_fb_leniv++;
	42	return true;
	43	}
06f751b6	44
aff388f7 CL	45	if (areq->cryptlen == 0) {
aff388f7 CL	46	algt->stat_fb_len0++;
06f751b6	47	return true;
aff388f7	48	}
06f751b6	49
aff388f7 CL	50	if (areq->cryptlen % 16) {
aff388f7 CL	51	algt->stat_fb_mod16++;
06f751b6	52	return true;
aff388f7	53	}
06f751b6	54
42a01af3	55	len = areq->cryptlen;
06f751b6 CL	56	sg = areq->src;
06f751b6 CL	57	while (sg) {
aff388f7 CL	58	if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
	59	algt->stat_fb_srcali++;
	60	return true;
	61	}
42a01af3 CL	62	todo = min(len, sg->length);
42a01af3 CL	63	if (todo % 4) {
aff388f7	64	algt->stat_fb_srclen++;
06f751b6	65	return true;
aff388f7	66	}
42a01af3	67	len -= todo;
06f751b6 CL	68	sg = sg_next(sg);
06f751b6 CL	69	}
42a01af3 CL	70
42a01af3 CL	71	len = areq->cryptlen;
06f751b6 CL	72	sg = areq->dst;
06f751b6 CL	73	while (sg) {
aff388f7 CL	74	if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
	75	algt->stat_fb_dstali++;
	76	return true;
	77	}
42a01af3 CL	78	todo = min(len, sg->length);
42a01af3 CL	79	if (todo % 4) {
aff388f7	80	algt->stat_fb_dstlen++;
06f751b6	81	return true;
aff388f7	82	}
42a01af3	83	len -= todo;
06f751b6 CL	84	sg = sg_next(sg);
	85	}
	86	return false;
	87	}
	88
	89	static int sun8i_ce_cipher_fallback(struct skcipher_request *areq)
	90	{
	91	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	92	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	93	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	94	int err;
06f751b6	95
07e34cd3 HX	96	if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG)) {
	97	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
	98	struct sun8i_ce_alg_template *algt __maybe_unused;
	99
	100	algt = container_of(alg, struct sun8i_ce_alg_template,
	101	alg.skcipher.base);
	102
	103	#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
	104	algt->stat_fb++;
06f751b6	105	#endif
07e34cd3	106	}
06f751b6	107
31abd3eb AB	108	skcipher_request_set_tfm(&rctx->fallback_req, op->fallback_tfm);
	109	skcipher_request_set_callback(&rctx->fallback_req, areq->base.flags,
	110	areq->base.complete, areq->base.data);
	111	skcipher_request_set_crypt(&rctx->fallback_req, areq->src, areq->dst,
06f751b6 CL	112	areq->cryptlen, areq->iv);
06f751b6 CL	113	if (rctx->op_dir & CE_DECRYPTION)
31abd3eb	114	err = crypto_skcipher_decrypt(&rctx->fallback_req);
06f751b6	115	else
31abd3eb	116	err = crypto_skcipher_encrypt(&rctx->fallback_req);
06f751b6 CL	117	return err;
	118	}
	119
0605fa0f	120	static int sun8i_ce_cipher_prepare(struct crypto_engine engine, void async_req)
06f751b6	121	{
0605fa0f	122	struct skcipher_request *areq = container_of(async_req, struct skcipher_request, base);
06f751b6 CL	123	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	124	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	125	struct sun8i_ce_dev *ce = op->ce;
	126	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	127	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
	128	struct sun8i_ce_alg_template *algt;
	129	struct sun8i_ce_flow *chan;
	130	struct ce_task *cet;
	131	struct scatterlist *sg;
	132	unsigned int todo, len, offset, ivsize;
93c7f4d3	133	u32 common, sym;
06f751b6 CL	134	int flow, i;
	135	int nr_sgs = 0;
	136	int nr_sgd = 0;
	137	int err = 0;
6b8309fa CL	138	int ns = sg_nents_for_len(areq->src, areq->cryptlen);
6b8309fa CL	139	int nd = sg_nents_for_len(areq->dst, areq->cryptlen);
06f751b6	140
07e34cd3	141	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);
06f751b6 CL	142
	143	dev_dbg(ce->dev, "%s %s %u %x IV(%p %u) key=%u\n", __func__,
	144	crypto_tfm_alg_name(areq->base.tfm),
	145	areq->cryptlen,
	146	rctx->op_dir, areq->iv, crypto_skcipher_ivsize(tfm),
	147	op->keylen);
	148
	149	#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
	150	algt->stat_req++;
	151	#endif
	152
	153	flow = rctx->flow;
	154
	155	chan = &ce->chanlist[flow];
	156
	157	cet = chan->tl;
	158	memset(cet, 0, sizeof(struct ce_task));
	159
93c7f4d3 CL	160	cet->t_id = cpu_to_le32(flow);
	161	common = ce->variant->alg_cipher[algt->ce_algo_id];
	162	common \|= rctx->op_dir \| CE_COMM_INT;
	163	cet->t_common_ctl = cpu_to_le32(common);
06f751b6	164	/* CTS and recent CE (H6) need length in bytes, in word otherwise */
6b4f76c2	165	if (ce->variant->cipher_t_dlen_in_bytes)
93c7f4d3 CL	166	cet->t_dlen = cpu_to_le32(areq->cryptlen);
	167	else
	168	cet->t_dlen = cpu_to_le32(areq->cryptlen / 4);
06f751b6	169
93c7f4d3	170	sym = ce->variant->op_mode[algt->ce_blockmode];
06f751b6 CL	171	len = op->keylen;
	172	switch (len) {
	173	case 128 / 8:
93c7f4d3	174	sym \|= CE_AES_128BITS;
06f751b6 CL	175	break;
06f751b6 CL	176	case 192 / 8:
93c7f4d3	177	sym \|= CE_AES_192BITS;
06f751b6 CL	178	break;
06f751b6 CL	179	case 256 / 8:
93c7f4d3	180	sym \|= CE_AES_256BITS;
06f751b6 CL	181	break;
	182	}
	183
93c7f4d3	184	cet->t_sym_ctl = cpu_to_le32(sym);
06f751b6 CL	185	cet->t_asym_ctl = 0;
06f751b6 CL	186
0605fa0f CL	187	rctx->addr_key = dma_map_single(ce->dev, op->key, op->keylen, DMA_TO_DEVICE);
0605fa0f CL	188	if (dma_mapping_error(ce->dev, rctx->addr_key)) {
06f751b6 CL	189	dev_err(ce->dev, "Cannot DMA MAP KEY\n");
	190	err = -EFAULT;
	191	goto theend;
	192	}
0605fa0f	193	cet->t_key = cpu_to_le32(rctx->addr_key);
06f751b6 CL	194
	195	ivsize = crypto_skcipher_ivsize(tfm);
	196	if (areq->iv && crypto_skcipher_ivsize(tfm) > 0) {
a216f8d5	197	rctx->ivlen = ivsize;
06f751b6	198	if (rctx->op_dir & CE_DECRYPTION) {
06f751b6	199	offset = areq->cryptlen - ivsize;
22f7c2f8	200	scatterwalk_map_and_copy(chan->backup_iv, areq->src,
a216f8d5	201	offset, ivsize, 0);
06f751b6	202	}
22f7c2f8 CL	203	memcpy(chan->bounce_iv, areq->iv, ivsize);
22f7c2f8 CL	204	rctx->addr_iv = dma_map_single(ce->dev, chan->bounce_iv, rctx->ivlen,
0605fa0f CL	205	DMA_TO_DEVICE);
0605fa0f CL	206	if (dma_mapping_error(ce->dev, rctx->addr_iv)) {
06f751b6 CL	207	dev_err(ce->dev, "Cannot DMA MAP IV\n");
	208	err = -ENOMEM;
	209	goto theend_iv;
	210	}
0605fa0f	211	cet->t_iv = cpu_to_le32(rctx->addr_iv);
06f751b6 CL	212	}
	213
	214	if (areq->src == areq->dst) {
6b8309fa	215	nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_BIDIRECTIONAL);
06f751b6 CL	216	if (nr_sgs <= 0 \|\| nr_sgs > MAX_SG) {
	217	dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
	218	err = -EINVAL;
	219	goto theend_iv;
	220	}
	221	nr_sgd = nr_sgs;
	222	} else {
6b8309fa	223	nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
06f751b6 CL	224	if (nr_sgs <= 0 \|\| nr_sgs > MAX_SG) {
	225	dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
	226	err = -EINVAL;
	227	goto theend_iv;
	228	}
6b8309fa	229	nr_sgd = dma_map_sg(ce->dev, areq->dst, nd, DMA_FROM_DEVICE);
06f751b6 CL	230	if (nr_sgd <= 0 \|\| nr_sgd > MAX_SG) {
	231	dev_err(ce->dev, "Invalid sg number %d\n", nr_sgd);
	232	err = -EINVAL;
	233	goto theend_sgs;
	234	}
	235	}
	236
	237	len = areq->cryptlen;
	238	for_each_sg(areq->src, sg, nr_sgs, i) {
93c7f4d3	239	cet->t_src[i].addr = cpu_to_le32(sg_dma_address(sg));
06f751b6	240	todo = min(len, sg_dma_len(sg));
93c7f4d3	241	cet->t_src[i].len = cpu_to_le32(todo / 4);
06f751b6 CL	242	dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
	243	areq->cryptlen, i, cet->t_src[i].len, sg->offset, todo);
	244	len -= todo;
	245	}
	246	if (len > 0) {
	247	dev_err(ce->dev, "remaining len %d\n", len);
	248	err = -EINVAL;
	249	goto theend_sgs;
	250	}
	251
	252	len = areq->cryptlen;
	253	for_each_sg(areq->dst, sg, nr_sgd, i) {
93c7f4d3	254	cet->t_dst[i].addr = cpu_to_le32(sg_dma_address(sg));
06f751b6	255	todo = min(len, sg_dma_len(sg));
93c7f4d3	256	cet->t_dst[i].len = cpu_to_le32(todo / 4);
06f751b6 CL	257	dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
	258	areq->cryptlen, i, cet->t_dst[i].len, sg->offset, todo);
	259	len -= todo;
	260	}
	261	if (len > 0) {
	262	dev_err(ce->dev, "remaining len %d\n", len);
	263	err = -EINVAL;
	264	goto theend_sgs;
	265	}
	266
	267	chan->timeout = areq->cryptlen;
0605fa0f CL	268	rctx->nr_sgs = nr_sgs;
	269	rctx->nr_sgd = nr_sgd;
	270	return 0;
06f751b6 CL	271
	272	theend_sgs:
	273	if (areq->src == areq->dst) {
6b8309fa	274	dma_unmap_sg(ce->dev, areq->src, ns, DMA_BIDIRECTIONAL);
06f751b6 CL	275	} else {
06f751b6 CL	276	if (nr_sgs > 0)
6b8309fa CL	277	dma_unmap_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
6b8309fa CL	278	dma_unmap_sg(ce->dev, areq->dst, nd, DMA_FROM_DEVICE);
06f751b6 CL	279	}
	280
	281	theend_iv:
	282	if (areq->iv && ivsize > 0) {
0605fa0f CL	283	if (rctx->addr_iv)
0605fa0f CL	284	dma_unmap_single(ce->dev, rctx->addr_iv, rctx->ivlen, DMA_TO_DEVICE);
06f751b6 CL	285	offset = areq->cryptlen - ivsize;
06f751b6 CL	286	if (rctx->op_dir & CE_DECRYPTION) {
22f7c2f8 CL	287	memcpy(areq->iv, chan->backup_iv, ivsize);
22f7c2f8 CL	288	memzero_explicit(chan->backup_iv, ivsize);
06f751b6 CL	289	} else {
	290	scatterwalk_map_and_copy(areq->iv, areq->dst, offset,
	291	ivsize, 0);
	292	}
22f7c2f8	293	memzero_explicit(chan->bounce_iv, ivsize);
06f751b6 CL	294	}
06f751b6 CL	295
0605fa0f	296	dma_unmap_single(ce->dev, rctx->addr_key, op->keylen, DMA_TO_DEVICE);
06f751b6 CL	297
	298	theend:
	299	return err;
	300	}
	301
4136212a HX	302	static void sun8i_ce_cipher_unprepare(struct crypto_engine *engine,
4136212a HX	303	void *async_req)
0605fa0f CL	304	{
	305	struct skcipher_request *areq = container_of(async_req, struct skcipher_request, base);
	306	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	307	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	308	struct sun8i_ce_dev *ce = op->ce;
	309	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	310	struct sun8i_ce_flow *chan;
	311	struct ce_task *cet;
	312	unsigned int ivsize, offset;
	313	int nr_sgs = rctx->nr_sgs;
	314	int nr_sgd = rctx->nr_sgd;
	315	int flow;
	316
	317	flow = rctx->flow;
	318	chan = &ce->chanlist[flow];
	319	cet = chan->tl;
	320	ivsize = crypto_skcipher_ivsize(tfm);
	321
	322	if (areq->src == areq->dst) {
	323	dma_unmap_sg(ce->dev, areq->src, nr_sgs, DMA_BIDIRECTIONAL);
	324	} else {
	325	if (nr_sgs > 0)
	326	dma_unmap_sg(ce->dev, areq->src, nr_sgs, DMA_TO_DEVICE);
	327	dma_unmap_sg(ce->dev, areq->dst, nr_sgd, DMA_FROM_DEVICE);
	328	}
	329
	330	if (areq->iv && ivsize > 0) {
	331	if (cet->t_iv)
	332	dma_unmap_single(ce->dev, rctx->addr_iv, rctx->ivlen, DMA_TO_DEVICE);
	333	offset = areq->cryptlen - ivsize;
	334	if (rctx->op_dir & CE_DECRYPTION) {
22f7c2f8 CL	335	memcpy(areq->iv, chan->backup_iv, ivsize);
22f7c2f8 CL	336	memzero_explicit(chan->backup_iv, ivsize);
0605fa0f CL	337	} else {
	338	scatterwalk_map_and_copy(areq->iv, areq->dst, offset,
	339	ivsize, 0);
	340	}
22f7c2f8	341	memzero_explicit(chan->bounce_iv, ivsize);
0605fa0f CL	342	}
	343
	344	dma_unmap_single(ce->dev, rctx->addr_key, op->keylen, DMA_TO_DEVICE);
4136212a HX	345	}
4136212a HX	346
18342003 AS	347	static void sun8i_ce_cipher_run(struct crypto_engine engine, void areq)
	348	{
	349	struct skcipher_request *breq = container_of(areq, struct skcipher_request, base);
	350	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(breq);
	351	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	352	struct sun8i_ce_dev *ce = op->ce;
	353	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(breq);
	354	int flow, err;
	355
	356	flow = rctx->flow;
	357	err = sun8i_ce_run_task(ce, flow, crypto_tfm_alg_name(breq->base.tfm));
	358	sun8i_ce_cipher_unprepare(engine, areq);
	359	local_bh_disable();
	360	crypto_finalize_skcipher_request(engine, breq, err);
	361	local_bh_enable();
	362	}
	363
07e34cd3	364	int sun8i_ce_cipher_do_one(struct crypto_engine engine, void areq)
4136212a HX	365	{
	366	int err = sun8i_ce_cipher_prepare(engine, areq);
	367
	368	if (err)
	369	return err;
06f751b6	370
4136212a	371	sun8i_ce_cipher_run(engine, areq);
06f751b6 CL	372	return 0;
	373	}
	374
	375	int sun8i_ce_skdecrypt(struct skcipher_request *areq)
	376	{
	377	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	378	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	379	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	380	struct crypto_engine *engine;
	381	int e;
	382
	383	rctx->op_dir = CE_DECRYPTION;
	384	if (sun8i_ce_cipher_need_fallback(areq))
	385	return sun8i_ce_cipher_fallback(areq);
	386
	387	e = sun8i_ce_get_engine_number(op->ce);
	388	rctx->flow = e;
	389	engine = op->ce->chanlist[e].engine;
	390
	391	return crypto_transfer_skcipher_request_to_engine(engine, areq);
	392	}
	393
	394	int sun8i_ce_skencrypt(struct skcipher_request *areq)
	395	{
	396	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
	397	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	398	struct sun8i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
	399	struct crypto_engine *engine;
	400	int e;
	401
	402	rctx->op_dir = CE_ENCRYPTION;
	403	if (sun8i_ce_cipher_need_fallback(areq))
	404	return sun8i_ce_cipher_fallback(areq);
	405
	406	e = sun8i_ce_get_engine_number(op->ce);
	407	rctx->flow = e;
	408	engine = op->ce->chanlist[e].engine;
	409
	410	return crypto_transfer_skcipher_request_to_engine(engine, areq);
	411	}
	412
	413	int sun8i_ce_cipher_init(struct crypto_tfm *tfm)
	414	{
	415	struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
	416	struct sun8i_ce_alg_template *algt;
	417	const char *name = crypto_tfm_alg_name(tfm);
	418	struct crypto_skcipher *sktfm = __crypto_skcipher_cast(tfm);
	419	struct skcipher_alg *alg = crypto_skcipher_alg(sktfm);
	420	int err;
	421
	422	memset(op, 0, sizeof(struct sun8i_cipher_tfm_ctx));
	423
07e34cd3	424	algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher.base);
06f751b6 CL	425	op->ce = algt->ce;
06f751b6 CL	426
31abd3eb	427	op->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
06f751b6 CL	428	if (IS_ERR(op->fallback_tfm)) {
	429	dev_err(op->ce->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
	430	name, PTR_ERR(op->fallback_tfm));
	431	return PTR_ERR(op->fallback_tfm);
	432	}
	433
e9b21862 OP	434	crypto_skcipher_set_reqsize(sktfm, sizeof(struct sun8i_cipher_req_ctx) +
e9b21862 OP	435	crypto_skcipher_reqsize(op->fallback_tfm));
31abd3eb	436
aff388f7 CL	437	memcpy(algt->fbname,
	438	crypto_tfm_alg_driver_name(crypto_skcipher_tfm(op->fallback_tfm)),
	439	CRYPTO_MAX_ALG_NAME);
06f751b6	440
06f751b6 CL	441	err = pm_runtime_get_sync(op->ce->dev);
	442	if (err < 0)
	443	goto error_pm;
	444
	445	return 0;
	446	error_pm:
5c3a8a66	447	pm_runtime_put_noidle(op->ce->dev);
31abd3eb	448	crypto_free_skcipher(op->fallback_tfm);
06f751b6 CL	449	return err;
	450	}
	451
	452	void sun8i_ce_cipher_exit(struct crypto_tfm *tfm)
	453	{
	454	struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
	455
712d8069	456	kfree_sensitive(op->key);
31abd3eb	457	crypto_free_skcipher(op->fallback_tfm);
06f751b6 CL	458	pm_runtime_put_sync_suspend(op->ce->dev);
	459	}
	460
	461	int sun8i_ce_aes_setkey(struct crypto_skcipher tfm, const u8 key,
	462	unsigned int keylen)
	463	{
	464	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	465	struct sun8i_ce_dev *ce = op->ce;
	466
	467	switch (keylen) {
	468	case 128 / 8:
	469	break;
	470	case 192 / 8:
	471	break;
	472	case 256 / 8:
	473	break;
	474	default:
	475	dev_dbg(ce->dev, "ERROR: Invalid keylen %u\n", keylen);
06f751b6 CL	476	return -EINVAL;
06f751b6 CL	477	}
712d8069	478	kfree_sensitive(op->key);
06f751b6	479	op->keylen = keylen;
c7351845	480	op->key = kmemdup(key, keylen, GFP_KERNEL \| GFP_DMA);
06f751b6 CL	481	if (!op->key)
06f751b6 CL	482	return -ENOMEM;
06f751b6	483
31abd3eb AB	484	crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
31abd3eb AB	485	crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
06f751b6	486
31abd3eb	487	return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
06f751b6 CL	488	}
	489
	490	int sun8i_ce_des3_setkey(struct crypto_skcipher tfm, const u8 key,
	491	unsigned int keylen)
	492	{
	493	struct sun8i_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
	494	int err;
	495
	496	err = verify_skcipher_des3_key(tfm, key);
	497	if (err)
	498	return err;
	499
712d8069	500	kfree_sensitive(op->key);
06f751b6	501	op->keylen = keylen;
c7351845	502	op->key = kmemdup(key, keylen, GFP_KERNEL \| GFP_DMA);
06f751b6 CL	503	if (!op->key)
06f751b6 CL	504	return -ENOMEM;
06f751b6	505
31abd3eb AB	506	crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
31abd3eb AB	507	crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
06f751b6	508
31abd3eb	509	return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
06f751b6	510	}