crypto: ccree - drop legacy ivgen support

ccree had a mechanism for IV generation which was not compatible
with the Linux seqiv or echainiv iv generator and was never used
in any of the upstream versions so drop all the code implementing it.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 8 insertions, 68 deletions

diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aead.c
index 7aa4cbe19a86..a9914ea6c95f 100644
--- a/drivers/crypto/ccree/cc_aead.c
+++ b/drivers/crypto/ccree/cc_aead.c
@@ -239,28 +239,13 @@ static void cc_aead_complete(struct device *dev, void *cc_req, int err)
 			cc_zero_sgl(areq->dst, areq_ctx->cryptlen);
 			err = -EBADMSG;
 		}
-	} else { /*ENCRYPT*/
-		if (areq_ctx->is_icv_fragmented) {
-			u32 skip = areq->cryptlen + areq_ctx->dst_offset;
-
-			cc_copy_sg_portion(dev, areq_ctx->mac_buf,
-					   areq_ctx->dst_sgl, skip,
-					   (skip + ctx->authsize),
-					   CC_SG_FROM_BUF);
-		}
+	/*ENCRYPT*/
+	} else if (areq_ctx->is_icv_fragmented) {
+		u32 skip = areq->cryptlen + areq_ctx->dst_offset;
 
-		/* If an IV was generated, copy it back to the user provided
-		 * buffer.
-		 */
-		if (areq_ctx->backup_giv) {
-			if (ctx->cipher_mode == DRV_CIPHER_CTR)
-				memcpy(areq_ctx->backup_giv, areq_ctx->ctr_iv +
-				       CTR_RFC3686_NONCE_SIZE,
-				       CTR_RFC3686_IV_SIZE);
-			else if (ctx->cipher_mode == DRV_CIPHER_CCM)
-				memcpy(areq_ctx->backup_giv, areq_ctx->ctr_iv +
-				       CCM_BLOCK_IV_OFFSET, CCM_BLOCK_IV_SIZE);
-		}
+		cc_copy_sg_portion(dev, areq_ctx->mac_buf, areq_ctx->dst_sgl,
+				   skip, (skip + ctx->authsize),
+				   CC_SG_FROM_BUF);
 	}
 done:
 	aead_request_complete(areq, err);
@@ -1975,9 +1960,8 @@ static int cc_proc_aead(struct aead_request *req,
 		 */
 		memcpy(areq_ctx->ctr_iv, ctx->ctr_nonce,
 		       CTR_RFC3686_NONCE_SIZE);
-		if (!areq_ctx->backup_giv) /*User none-generated IV*/
-			memcpy(areq_ctx->ctr_iv + CTR_RFC3686_NONCE_SIZE,
-			       req->iv, CTR_RFC3686_IV_SIZE);
+		memcpy(areq_ctx->ctr_iv + CTR_RFC3686_NONCE_SIZE, req->iv,
+		       CTR_RFC3686_IV_SIZE);
 		/* Initialize counter portion of counter block */
 		*(__be32 *)(areq_ctx->ctr_iv + CTR_RFC3686_NONCE_SIZE +
 			    CTR_RFC3686_IV_SIZE) = cpu_to_be32(1);
@@ -2023,40 +2007,6 @@ static int cc_proc_aead(struct aead_request *req,
 		goto exit;
 	}
 
-	/* do we need to generate IV? */
-	if (areq_ctx->backup_giv) {
-		/* set the DMA mapped IV address*/
-		if (ctx->cipher_mode == DRV_CIPHER_CTR) {
-			cc_req.ivgen_dma_addr[0] =
-				areq_ctx->gen_ctx.iv_dma_addr +
-				CTR_RFC3686_NONCE_SIZE;
-			cc_req.ivgen_dma_addr_len = 1;
-		} else if (ctx->cipher_mode == DRV_CIPHER_CCM) {
-			/* In ccm, the IV needs to exist both inside B0 and
-			 * inside the counter.It is also copied to iv_dma_addr
-			 * for other reasons (like returning it to the user).
-			 * So, using 3 (identical) IV outputs.
-			 */
-			cc_req.ivgen_dma_addr[0] =
-				areq_ctx->gen_ctx.iv_dma_addr +
-				CCM_BLOCK_IV_OFFSET;
-			cc_req.ivgen_dma_addr[1] =
-				sg_dma_address(&areq_ctx->ccm_adata_sg) +
-				CCM_B0_OFFSET + CCM_BLOCK_IV_OFFSET;
-			cc_req.ivgen_dma_addr[2] =
-				sg_dma_address(&areq_ctx->ccm_adata_sg) +
-				CCM_CTR_COUNT_0_OFFSET + CCM_BLOCK_IV_OFFSET;
-			cc_req.ivgen_dma_addr_len = 3;
-		} else {
-			cc_req.ivgen_dma_addr[0] =
-				areq_ctx->gen_ctx.iv_dma_addr;
-			cc_req.ivgen_dma_addr_len = 1;
-		}
-
-		/* set the IV size (8/16 B long)*/
-		cc_req.ivgen_size = crypto_aead_ivsize(tfm);
-	}
-
 	/* STAT_PHASE_2: Create sequence */
 
 	/* Load MLLI tables to SRAM if necessary */
@@ -2107,7 +2057,6 @@ static int cc_aead_encrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 	areq_ctx->is_gcm4543 = false;
 
 	areq_ctx->plaintext_authenticate_only = false;
@@ -2139,7 +2088,6 @@ static int cc_rfc4309_ccm_encrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 	areq_ctx->is_gcm4543 = true;
 
 	cc_proc_rfc4309_ccm(req);
@@ -2161,7 +2109,6 @@ static int cc_aead_decrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 	areq_ctx->is_gcm4543 = false;
 
 	areq_ctx->plaintext_authenticate_only = false;
@@ -2191,7 +2138,6 @@ static int cc_rfc4309_ccm_decrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 
 	areq_ctx->is_gcm4543 = true;
 	cc_proc_rfc4309_ccm(req);
@@ -2311,8 +2257,6 @@ static int cc_rfc4106_gcm_encrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
-
 	areq_ctx->plaintext_authenticate_only = false;
 
 	cc_proc_rfc4_gcm(req);
@@ -2340,7 +2284,6 @@ static int cc_rfc4543_gcm_encrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 
 	cc_proc_rfc4_gcm(req);
 	areq_ctx->is_gcm4543 = true;
@@ -2372,8 +2315,6 @@ static int cc_rfc4106_gcm_decrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
-
 	areq_ctx->plaintext_authenticate_only = false;
 
 	cc_proc_rfc4_gcm(req);
@@ -2401,7 +2342,6 @@ static int cc_rfc4543_gcm_decrypt(struct aead_request *req)
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->assoclen = req->assoclen;
-	areq_ctx->backup_giv = NULL;
 
 	cc_proc_rfc4_gcm(req);
 	areq_ctx->is_gcm4543 = true;