apm821xx: backport crypto4xx patches from 4.15

This patch backports changes to crypto4xx in order
to get the crypto4xx operational.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 209 insertions, 0 deletions

diff --git a/target/linux/apm821xx/patches-4.14/020-0022-crypto-crypto4xx-simplify-sa-and-state-context-acqui.patch b/target/linux/apm821xx/patches-4.14/020-0022-crypto-crypto4xx-simplify-sa-and-state-context-acqui.patch
new file mode 100644
index 0000000..06ab798
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.14/020-0022-crypto-crypto4xx-simplify-sa-and-state-context-acqui.patch
@@ -0,0 +1,209 @@
+From 2f77690dcb96e525bc6b57bce4a0eaecaa2878d1 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Wed, 4 Oct 2017 01:00:14 +0200
+Subject: [PATCH 22/25] crypto: crypto4xx - simplify sa and state context
+ acquisition
+
+Thanks to the big overhaul of crypto4xx_build_pd(), the request-local
+sa_in, sa_out and state_record allocation can be simplified.
+
+There's no need to setup any dma coherent memory anymore and
+much of the support code can be removed.
+
+Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
+Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
+---
+ drivers/crypto/amcc/crypto4xx_alg.c  | 27 +++++--------------
+ drivers/crypto/amcc/crypto4xx_core.c | 50 ++++++------------------------------
+ drivers/crypto/amcc/crypto4xx_core.h |  6 +----
+ 3 files changed, 15 insertions(+), 68 deletions(-)
+
+--- a/drivers/crypto/amcc/crypto4xx_alg.c
++++ b/drivers/crypto/amcc/crypto4xx_alg.c
+@@ -122,20 +122,13 @@ static int crypto4xx_setkey_aes(struct c
+ 	}
+ 
+ 	/* Create SA */
+-	if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
++	if (ctx->sa_in || ctx->sa_out)
+ 		crypto4xx_free_sa(ctx);
+ 
+ 	rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
+ 	if (rc)
+ 		return rc;
+ 
+-	if (ctx->state_record_dma_addr == 0) {
+-		rc = crypto4xx_alloc_state_record(ctx);
+-		if (rc) {
+-			crypto4xx_free_sa(ctx);
+-			return rc;
+-		}
+-	}
+ 	/* Setup SA */
+ 	sa = ctx->sa_in;
+ 
+@@ -203,8 +196,8 @@ int crypto4xx_setkey_rfc3686(struct cryp
+ 	if (rc)
+ 		return rc;
+ 
+-	crypto4xx_memcpy_to_le32(ctx->state_record->save_iv,
+-		key + keylen - CTR_RFC3686_NONCE_SIZE, CTR_RFC3686_NONCE_SIZE);
++	ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
++						 CTR_RFC3686_NONCE_SIZE]);
+ 
+ 	return 0;
+ }
+@@ -213,7 +206,7 @@ int crypto4xx_rfc3686_encrypt(struct abl
+ {
+ 	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ 	__le32 iv[AES_IV_SIZE / 4] = {
+-		ctx->state_record->save_iv[0],
++		ctx->iv_nonce,
+ 		cpu_to_le32p((u32 *) req->info),
+ 		cpu_to_le32p((u32 *) (req->info + 4)),
+ 		cpu_to_le32(1) };
+@@ -227,7 +220,7 @@ int crypto4xx_rfc3686_decrypt(struct abl
+ {
+ 	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ 	__le32 iv[AES_IV_SIZE / 4] = {
+-		ctx->state_record->save_iv[0],
++		ctx->iv_nonce,
+ 		cpu_to_le32p((u32 *) req->info),
+ 		cpu_to_le32p((u32 *) (req->info + 4)),
+ 		cpu_to_le32(1) };
+@@ -254,21 +247,13 @@ static int crypto4xx_hash_alg_init(struc
+ 	ctx->dev   = my_alg->dev;
+ 
+ 	/* Create SA */
+-	if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
++	if (ctx->sa_in || ctx->sa_out)
+ 		crypto4xx_free_sa(ctx);
+ 
+ 	rc = crypto4xx_alloc_sa(ctx, sa_len);
+ 	if (rc)
+ 		return rc;
+ 
+-	if (ctx->state_record_dma_addr == 0) {
+-		crypto4xx_alloc_state_record(ctx);
+-		if (!ctx->state_record_dma_addr) {
+-			crypto4xx_free_sa(ctx);
+-			return -ENOMEM;
+-		}
+-	}
+-
+ 	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ 				 sizeof(struct crypto4xx_ctx));
+ 	sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
+--- a/drivers/crypto/amcc/crypto4xx_core.c
++++ b/drivers/crypto/amcc/crypto4xx_core.c
+@@ -130,21 +130,17 @@ static void crypto4xx_hw_init(struct cry
+ 
+ int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
+ {
+-	ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
+-					&ctx->sa_in_dma_addr, GFP_ATOMIC);
++	ctx->sa_in = kzalloc(size * 4, GFP_ATOMIC);
+ 	if (ctx->sa_in == NULL)
+ 		return -ENOMEM;
+ 
+-	ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
+-					 &ctx->sa_out_dma_addr, GFP_ATOMIC);
++	ctx->sa_out = kzalloc(size * 4, GFP_ATOMIC);
+ 	if (ctx->sa_out == NULL) {
+-		dma_free_coherent(ctx->dev->core_dev->device, size * 4,
+-				  ctx->sa_in, ctx->sa_in_dma_addr);
++		kfree(ctx->sa_in);
++		ctx->sa_in = NULL;
+ 		return -ENOMEM;
+ 	}
+ 
+-	memset(ctx->sa_in, 0, size * 4);
+-	memset(ctx->sa_out, 0, size * 4);
+ 	ctx->sa_len = size;
+ 
+ 	return 0;
+@@ -152,40 +148,13 @@ int crypto4xx_alloc_sa(struct crypto4xx_
+ 
+ void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
+ {
+-	if (ctx->sa_in != NULL)
+-		dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
+-				  ctx->sa_in, ctx->sa_in_dma_addr);
+-	if (ctx->sa_out != NULL)
+-		dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
+-				  ctx->sa_out, ctx->sa_out_dma_addr);
+-
+-	ctx->sa_in_dma_addr = 0;
+-	ctx->sa_out_dma_addr = 0;
++	kfree(ctx->sa_in);
++	ctx->sa_in = NULL;
++	kfree(ctx->sa_out);
++	ctx->sa_out = NULL;
+ 	ctx->sa_len = 0;
+ }
+ 
+-u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
+-{
+-	ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
+-				sizeof(struct sa_state_record),
+-				&ctx->state_record_dma_addr, GFP_ATOMIC);
+-	if (!ctx->state_record_dma_addr)
+-		return -ENOMEM;
+-	memset(ctx->state_record, 0, sizeof(struct sa_state_record));
+-
+-	return 0;
+-}
+-
+-static void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
+-{
+-	if (ctx->state_record != NULL)
+-		dma_free_coherent(ctx->dev->core_dev->device,
+-				  sizeof(struct sa_state_record),
+-				  ctx->state_record,
+-				  ctx->state_record_dma_addr);
+-	ctx->state_record_dma_addr = 0;
+-}
+-
+ /**
+  * alloc memory for the gather ring
+  * no need to alloc buf for the ring
+@@ -883,8 +852,6 @@ static int crypto4xx_alg_init(struct cry
+ 	ctx->dev = amcc_alg->dev;
+ 	ctx->sa_in = NULL;
+ 	ctx->sa_out = NULL;
+-	ctx->sa_in_dma_addr = 0;
+-	ctx->sa_out_dma_addr = 0;
+ 	ctx->sa_len = 0;
+ 
+ 	switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
+@@ -905,7 +872,6 @@ static void crypto4xx_alg_exit(struct cr
+ 	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+ 
+ 	crypto4xx_free_sa(ctx);
+-	crypto4xx_free_state_record(ctx);
+ }
+ 
+ int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,
+--- a/drivers/crypto/amcc/crypto4xx_core.h
++++ b/drivers/crypto/amcc/crypto4xx_core.h
+@@ -122,11 +122,8 @@ struct crypto4xx_core_device {
+ struct crypto4xx_ctx {
+ 	struct crypto4xx_device *dev;
+ 	struct dynamic_sa_ctl *sa_in;
+-	dma_addr_t sa_in_dma_addr;
+ 	struct dynamic_sa_ctl *sa_out;
+-	dma_addr_t sa_out_dma_addr;
+-	struct sa_state_record *state_record;
+-	dma_addr_t state_record_dma_addr;
++	__le32 iv_nonce;
+ 	u32 sa_len;
+ };
+ 
+@@ -159,7 +156,6 @@ static inline struct crypto4xx_alg *cryp
+ int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
+ void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
+ void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
+-u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
+ int crypto4xx_build_pd(struct crypto_async_request *req,
+ 		       struct crypto4xx_ctx *ctx,
+ 		       struct scatterlist *src,