[PATCH 18/26] staging: ccree: allocate hash bufs inside req ctx

[Gilad Ben-Yossef]

Move to allocating the buffers needed for requests as part of
the request structure instead of malloc'ing each one on it's
own, making for simpler (and more efficient) code.

Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
---
 drivers/staging/ccree/ssi_hash.c | 68 ++++------------------------------------
 drivers/staging/ccree/ssi_hash.h | 12 +++----
 2 files changed, 12 insertions(+), 68 deletions(-)

diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c
index 183b6cd..a244d35 100644
--- a/drivers/staging/ccree/ssi_hash.c
+++ b/drivers/staging/ccree/ssi_hash.c
@@ -108,7 +108,7 @@ static int cc_map_result(struct device *dev, struct ahash_req_ctx *state,
 			 unsigned int digestsize)
 {
 	state->digest_result_dma_addr =
-		dma_map_single(dev, (void *)state->digest_result_buff,
+		dma_map_single(dev, state->digest_result_buff,
 			       digestsize,
 			       DMA_BIDIRECTIONAL);
 	if (dma_mapping_error(dev, state->digest_result_dma_addr)) {
@@ -129,49 +129,15 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
 	bool is_hmac = ctx->is_hmac;
 	int rc = -ENOMEM;
 
-	state->buffers[0] = kzalloc(CC_MAX_HASH_BLCK_SIZE, flags);
-	if (!state->buffers[0])
-		goto fail0;
-
-	state->buffers[1] = kzalloc(CC_MAX_HASH_BLCK_SIZE, flags);
-	if (!state->buffers[1])
-		goto fail_buff0;
-
-	state->digest_result_buff = kzalloc(CC_MAX_HASH_DIGEST_SIZE, flags);
-	if (!state->digest_result_buff)
-		goto fail_buff1;
-
-	state->digest_buff = kzalloc(ctx->inter_digestsize, flags);
-	if (!state->digest_buff)
-		goto fail_digest_result_buff;
-
-	dev_dbg(dev, "Allocated digest-buffer in context ctx->digest_buff=@%p\n",
-		state->digest_buff);
-	if (ctx->hw_mode != DRV_CIPHER_XCBC_MAC) {
-		state->digest_bytes_len = kzalloc(HASH_LEN_SIZE, flags);
-		if (!state->digest_bytes_len)
-			goto fail1;
-
-		dev_dbg(dev, "Allocated digest-bytes-len in context state->>digest_bytes_len=@%p\n",
-			state->digest_bytes_len);
-	} else {
-		state->digest_bytes_len = NULL;
-	}
-
-	state->opad_digest_buff = kzalloc(ctx->inter_digestsize, flags);
-	if (!state->opad_digest_buff)
-		goto fail2;
-
-	dev_dbg(dev, "Allocated opad-digest-buffer in context state->digest_bytes_len=@%p\n",
-		state->opad_digest_buff);
+	memset(state, 0, sizeof(*state));
 
 	state->digest_buff_dma_addr =
-		dma_map_single(dev, (void *)state->digest_buff,
+		dma_map_single(dev, state->digest_buff,
 			       ctx->inter_digestsize, DMA_BIDIRECTIONAL);
 	if (dma_mapping_error(dev, state->digest_buff_dma_addr)) {
 		dev_err(dev, "Mapping digest len %d B at va=%pK for DMA failed\n",
 			ctx->inter_digestsize, state->digest_buff);
-		goto fail3;
+		goto fail0;
 	}
 	dev_dbg(dev, "Mapped digest %d B at va=%pK to dma=%pad\n",
 		ctx->inter_digestsize, state->digest_buff,
@@ -221,7 +187,7 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
 
 	if (ctx->hw_mode != DRV_CIPHER_XCBC_MAC) {
 		state->digest_bytes_len_dma_addr =
-			dma_map_single(dev, (void *)state->digest_bytes_len,
+			dma_map_single(dev, state->digest_bytes_len,
 				       HASH_LEN_SIZE, DMA_BIDIRECTIONAL);
 		if (dma_mapping_error(dev, state->digest_bytes_len_dma_addr)) {
 			dev_err(dev, "Mapping digest len %u B at va=%pK for DMA failed\n",
@@ -237,7 +203,7 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
 
 	if (is_hmac && ctx->hash_mode != DRV_HASH_NULL) {
 		state->opad_digest_dma_addr =
-			dma_map_single(dev, (void *)state->opad_digest_buff,
+			dma_map_single(dev, state->opad_digest_buff,
 				       ctx->inter_digestsize,
 				       DMA_BIDIRECTIONAL);
 		if (dma_mapping_error(dev, state->opad_digest_dma_addr)) {
@@ -271,21 +237,6 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
 				 ctx->inter_digestsize, DMA_BIDIRECTIONAL);
 		state->digest_buff_dma_addr = 0;
 	}
-fail3:
-	kfree(state->opad_digest_buff);
-fail2:
-	kfree(state->digest_bytes_len);
-fail1:
-	 kfree(state->digest_buff);
-fail_digest_result_buff:
-	kfree(state->digest_result_buff);
-	state->digest_result_buff = NULL;
-fail_buff1:
-	kfree(state->buffers[1]);
-	state->buffers[1] = NULL;
-fail_buff0:
-	kfree(state->buffers[0]);
-	state->buffers[0] = NULL;
 fail0:
 	return rc;
 }
@@ -314,13 +265,6 @@ static void cc_unmap_req(struct device *dev, struct ahash_req_ctx *state,
 			&state->opad_digest_dma_addr);
 		state->opad_digest_dma_addr = 0;
 	}
-
-	kfree(state->opad_digest_buff);
-	kfree(state->digest_bytes_len);
-	kfree(state->digest_buff);
-	kfree(state->digest_result_buff);
-	kfree(state->buffers[1]);
-	kfree(state->buffers[0]);
 }
 
 static void cc_unmap_result(struct device *dev, struct ahash_req_ctx *state,
diff --git a/drivers/staging/ccree/ssi_hash.h b/drivers/staging/ccree/ssi_hash.h
index 18924d3..faa9583 100644
--- a/drivers/staging/ccree/ssi_hash.h
+++ b/drivers/staging/ccree/ssi_hash.h
@@ -39,13 +39,13 @@ struct aeshash_state {
 
 /* ahash state */
 struct ahash_req_ctx {
-	u8 *buffers[2];
-	u8 *digest_result_buff;
-	struct async_gen_req_ctx gen_ctx;
+	u8 buffers[2][CC_MAX_HASH_BLCK_SIZE] ____cacheline_aligned;
+	u8 digest_result_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
+	u8 digest_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
+	u8 opad_digest_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
+	u8 digest_bytes_len[HASH_LEN_SIZE] ____cacheline_aligned;
+	struct async_gen_req_ctx gen_ctx ____cacheline_aligned;
 	enum cc_req_dma_buf_type data_dma_buf_type;
-	u8 *digest_buff;
-	u8 *opad_digest_buff;
-	u8 *digest_bytes_len;
 	dma_addr_t opad_digest_dma_addr;
 	dma_addr_t digest_buff_dma_addr;
 	dma_addr_t digest_bytes_len_dma_addr;
-- 
2.7.4