MLK-12312: CAAM hash algorithms fail registration during initialization

Fix cherry-picked from 5ec908319ab53072d3a2188e62ed2e5d7b846951

crypto: caam - only export the state we really need to export

Avoid exporting lots of state by only exporting what we really require,
which is the buffer containing the set of pending bytes to be hashed,
number of pending bytes, the context buffer, and the function pointer
state.  This reduces down the exported state size to 216 bytes from
576 bytes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 43 insertions, 10 deletions

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 4a8f7c0d3c6c..b1bbe2bbd222 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -136,6 +136,15 @@ struct caam_hash_state {
 	int current_buf;
 };
 
+struct caam_export_state {
+	u8 buf[CAAM_MAX_HASH_BLOCK_SIZE];
+	u8 caam_ctx[MAX_CTX_LEN];
+	int buflen;
+	int (*update)(struct ahash_request *req);
+	int (*final)(struct ahash_request *req);
+	int (*finup)(struct ahash_request *req);
+};
+
 /* Common job descriptor seq in/out ptr routines */
 
 /* Map state->caam_ctx, and append seq_out_ptr command that points to it */
@@ -1839,25 +1848,42 @@ static int ahash_final(struct ahash_request *req)
 
 static int ahash_export(struct ahash_request *req, void *out)
 {
-	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
-	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
 	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct caam_export_state *export = out;
+	int len;
+	u8 *buf;
+
+	if (state->current_buf) {
+		buf = state->buf_1;
+		len = state->buflen_1;
+	} else {
+		buf = state->buf_0;
+		len = state->buflen_1;
+	}
+
+	memcpy(export->buf, buf, len);
+	memcpy(export->caam_ctx, state->caam_ctx, sizeof(export->caam_ctx));
+	export->buflen = len;
+	export->update = state->update;
+	export->final = state->final;
+	export->finup = state->finup;
 
-	memcpy(out, ctx, sizeof(struct caam_hash_ctx));
-	memcpy(out + sizeof(struct caam_hash_ctx), state,
-	       sizeof(struct caam_hash_state));
 	return 0;
 }
 
 static int ahash_import(struct ahash_request *req, const void *in)
 {
-	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
-	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
 	struct caam_hash_state *state = ahash_request_ctx(req);
+	const struct caam_export_state *export = in;
+
+	memset(state, 0, sizeof(*state));
+	memcpy(state->buf_0, export->buf, export->buflen);
+	memcpy(state->caam_ctx, export->caam_ctx, sizeof(state->caam_ctx));
+	state->buflen_0 = export->buflen;
+	state->update = export->update;
+	state->final = export->final;
+	state->finup = export->finup;
 
-	memcpy(ctx, in, sizeof(struct caam_hash_ctx));
-	memcpy(state, in + sizeof(struct caam_hash_ctx),
-	       sizeof(struct caam_hash_state));
 	return 0;
 }
 
@@ -1891,6 +1917,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = SHA1_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_SHA1,
@@ -1912,6 +1939,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = SHA224_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_SHA224,
@@ -1933,6 +1961,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = SHA256_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_SHA256,
@@ -1954,6 +1983,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = SHA384_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_SHA384,
@@ -1975,6 +2005,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = SHA512_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_SHA512,
@@ -1996,6 +2027,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = ahash_setkey,
 			.halg = {
 				.digestsize = MD5_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_MD5,
@@ -2018,6 +2050,7 @@ static struct caam_hash_template driver_hash[] = {
 			.setkey = axcbc_setkey,
 			.halg = {
 				.digestsize = XCBC_MAC_DIGEST_SIZE,
+				.statesize = sizeof(struct caam_export_state),
 				},
 			},
 		.alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_XCBC_MAC,