[dpdk-dev] [PATCH v3 2/6] crypto/aesni_gcm: cpu crypto support

[Marcin Smoczynski]

Add support for CPU crypto mode by introducing required handler.
Crypto mode (sync/async) is chosen during sym session create if an
appropriate flag is set in an xform type number.

Authenticated encryption and decryption are supported with tag
generation/verification.

Signed-off-by: Marcin Smoczynski <marcinx.smoczynski at intel.com>
---
 drivers/crypto/aesni_gcm/aesni_gcm_ops.h      |   9 ++
 drivers/crypto/aesni_gcm/aesni_gcm_pmd.c      | 149 +++++++++++++++++-
 drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c  |   3 +
 .../crypto/aesni_gcm/aesni_gcm_pmd_private.h  |  18 ++-
 4 files changed, 169 insertions(+), 10 deletions(-)

diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_ops.h b/drivers/crypto/aesni_gcm/aesni_gcm_ops.h
index e272f1067..404c0adff 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_ops.h
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_ops.h
@@ -65,4 +65,13 @@ struct aesni_gcm_ops {
 	aesni_gcm_finalize_t finalize_dec;
 };
 
+/** GCM per-session operation handlers */
+struct aesni_gcm_session_ops {
+	aesni_gcm_t cipher;
+	aesni_gcm_pre_t pre;
+	aesni_gcm_init_t init;
+	aesni_gcm_update_t update;
+	aesni_gcm_finalize_t finalize;
+};
+
 #endif /* _AESNI_GCM_OPS_H_ */
diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
index 1a03be31d..860e9b369 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
@@ -25,9 +25,16 @@ aesni_gcm_set_session_parameters(const struct aesni_gcm_ops *gcm_ops,
 	const struct rte_crypto_sym_xform *aead_xform;
 	uint8_t key_length;
 	const uint8_t *key;
+	uint32_t xform_type;
+
+	/* check for CPU-crypto mode */
+	xform_type = xform->type;
+	sess->mode = xform_type | RTE_CRYPTO_SYM_CPU_CRYPTO ?
+		AESNI_GCM_MODE_SYNC : AESNI_GCM_MODE_ASYNC;
+	xform_type &= RTE_CRYPTO_SYM_XFORM_TYPE_MASK;
 
 	/* AES-GMAC */
-	if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
+	if (xform_type == RTE_CRYPTO_SYM_XFORM_AUTH) {
 		auth_xform = xform;
 		if (auth_xform->auth.algo != RTE_CRYPTO_AUTH_AES_GMAC) {
 			AESNI_GCM_LOG(ERR, "Only AES GMAC is supported as an "
@@ -49,7 +56,7 @@ aesni_gcm_set_session_parameters(const struct aesni_gcm_ops *gcm_ops,
 		sess->req_digest_length = auth_xform->auth.digest_length;
 
 	/* AES-GCM */
-	} else if (xform->type == RTE_CRYPTO_SYM_XFORM_AEAD) {
+	} else if (xform_type == RTE_CRYPTO_SYM_XFORM_AEAD) {
 		aead_xform = xform;
 
 		if (aead_xform->aead.algo != RTE_CRYPTO_AEAD_AES_GCM) {
@@ -62,11 +69,24 @@ aesni_gcm_set_session_parameters(const struct aesni_gcm_ops *gcm_ops,
 		sess->iv.offset = aead_xform->aead.iv.offset;
 		sess->iv.length = aead_xform->aead.iv.length;
 
+		/* setup session handlers */
+		sess->ops.pre = gcm_ops->pre;
+		sess->ops.init = gcm_ops->init;
+
 		/* Select Crypto operation */
-		if (aead_xform->aead.op == RTE_CRYPTO_AEAD_OP_ENCRYPT)
+		if (aead_xform->aead.op == RTE_CRYPTO_AEAD_OP_ENCRYPT) {
 			sess->op = AESNI_GCM_OP_AUTHENTICATED_ENCRYPTION;
-		else
+			sess->ops.cipher = gcm_ops->enc;
+			sess->ops.update = gcm_ops->update_enc;
+			sess->ops.finalize = gcm_ops->finalize_enc;
+		}
+		/* op == RTE_CRYPTO_AEAD_OP_DECRYPT */
+		else {
 			sess->op = AESNI_GCM_OP_AUTHENTICATED_DECRYPTION;
+			sess->ops.cipher = gcm_ops->dec;
+			sess->ops.update = gcm_ops->update_dec;
+			sess->ops.finalize = gcm_ops->finalize_dec;
+		}
 
 		key_length = aead_xform->aead.key.length;
 		key = aead_xform->aead.key.data;
@@ -78,7 +98,6 @@ aesni_gcm_set_session_parameters(const struct aesni_gcm_ops *gcm_ops,
 		return -ENOTSUP;
 	}
 
-
 	/* IV check */
 	if (sess->iv.length != 16 && sess->iv.length != 12 &&
 			sess->iv.length != 0) {
@@ -356,6 +375,122 @@ process_gcm_crypto_op(struct aesni_gcm_qp *qp, struct rte_crypto_op *op,
 	return 0;
 }
 
+static inline void
+aesni_gcm_fill_error_code(struct rte_crypto_sym_vec *vec, int32_t errnum)
+{
+	uint32_t i;
+
+	for (i = 0; i < vec->num; i++)
+		vec->status[i] = errnum;
+}
+
+
+static inline int32_t
+aesni_gcm_sgl_op_finalize_encryption(struct aesni_gcm_session *s,
+	struct gcm_context_data *gdata_ctx, uint8_t *digest)
+{
+	if (s->req_digest_length != s->gen_digest_length) {
+		uint8_t tmpdigest[s->gen_digest_length];
+
+		s->ops.finalize(&s->gdata_key, gdata_ctx, tmpdigest,
+			s->gen_digest_length);
+		memcpy(digest, tmpdigest, s->req_digest_length);
+	} else {
+		s->ops.finalize(&s->gdata_key, gdata_ctx, digest,
+			s->gen_digest_length);
+	}
+
+	return 0;
+}
+
+static inline int32_t
+aesni_gcm_sgl_op_finalize_decryption(struct aesni_gcm_session *s,
+	struct gcm_context_data *gdata_ctx, uint8_t *digest)
+{
+	uint8_t tmpdigest[s->gen_digest_length];
+
+	s->ops.finalize(&s->gdata_key, gdata_ctx, tmpdigest,
+		s->gen_digest_length);
+
+	return memcmp(digest, tmpdigest, s->req_digest_length) == 0 ? 0 :
+		EBADMSG;
+}
+
+static inline void
+aesni_gcm_process_gcm_sgl_op(struct aesni_gcm_session *s,
+	struct gcm_context_data *gdata_ctx, struct rte_crypto_sgl *sgl,
+	void *iv, void *aad)
+{
+	uint32_t i;
+
+	/* init crypto operation */
+	s->ops.init(&s->gdata_key, gdata_ctx, iv, aad,
+		(uint64_t)s->aad_length);
+
+	/* update with sgl data */
+	for (i = 0; i < sgl->num; i++) {
+		struct rte_crypto_vec *vec = &sgl->vec[i];
+
+		s->ops.update(&s->gdata_key, gdata_ctx, vec->base, vec->base,
+			vec->len);
+	}
+}
+
+/** Process CPU crypto bulk operations */
+uint32_t
+aesni_gcm_pmd_cpu_crypto_process(struct rte_cryptodev *dev,
+	struct rte_cryptodev_sym_session *sess,
+	__rte_unused union rte_crypto_sym_ofs ofs,
+	struct rte_crypto_sym_vec *vec)
+{
+	void *sess_priv;
+	struct aesni_gcm_session *s;
+	uint32_t processed;
+	uint32_t i;
+
+	sess_priv = get_sym_session_private_data(sess, dev->driver_id);
+	if (unlikely(sess_priv == NULL)) {
+		aesni_gcm_fill_error_code(vec, EINVAL);
+		return 0;
+	}
+
+	s = sess_priv;
+	if (unlikely(s->mode != AESNI_GCM_MODE_SYNC)) {
+		aesni_gcm_fill_error_code(vec, EINVAL);
+		return 0;
+	}
+
+	processed = 0;
+	for (i = 0; i < vec->num; ++i) {
+		struct gcm_context_data gdata_ctx;
+		int32_t status;
+
+		aesni_gcm_process_gcm_sgl_op(s, &gdata_ctx, &vec->sgl[i],
+			vec->iv[i], vec->aad[i]);
+
+		switch (s->op) {
+		case AESNI_GCM_OP_AUTHENTICATED_ENCRYPTION:
+			status = aesni_gcm_sgl_op_finalize_encryption(s,
+				&gdata_ctx, vec->digest[i]);
+			break;
+
+		case AESNI_GCM_OP_AUTHENTICATED_DECRYPTION:
+			status = aesni_gcm_sgl_op_finalize_decryption(s,
+				&gdata_ctx, vec->digest[i]);
+			break;
+
+		default:
+			status = EINVAL;
+		}
+
+		vec->status[i] = status;
+		if (status == 0)
+			processed++;
+	}
+
+	return processed;
+}
+
 /**
  * Process a completed job and return rte_mbuf which job processed
  *
@@ -527,7 +662,8 @@ aesni_gcm_create(const char *name,
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 			RTE_CRYPTODEV_FF_IN_PLACE_SGL |
 			RTE_CRYPTODEV_FF_OOP_SGL_IN_LB_OUT |
-			RTE_CRYPTODEV_FF_OOP_LB_IN_LB_OUT;
+			RTE_CRYPTODEV_FF_OOP_LB_IN_LB_OUT |
+			RTE_CRYPTODEV_FF_SYM_CPU_CRYPTO;
 
 	/* Check CPU for support for AES instruction set */
 	if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AES))
@@ -672,7 +808,6 @@ RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_AESNI_GCM_PMD,
 RTE_PMD_REGISTER_CRYPTO_DRIVER(aesni_gcm_crypto_drv, aesni_gcm_pmd_drv.driver,
 		cryptodev_driver_id);
 
-
 RTE_INIT(aesni_gcm_init_log)
 {
 	aesni_gcm_logtype_driver = rte_log_register("pmd.crypto.aesni_gcm");
diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c b/drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c
index 2f66c7c58..5228d98b1 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c
@@ -331,9 +331,12 @@ struct rte_cryptodev_ops aesni_gcm_pmd_ops = {
 		.queue_pair_release	= aesni_gcm_pmd_qp_release,
 		.queue_pair_count	= aesni_gcm_pmd_qp_count,
 
+		.sym_cpu_process        = aesni_gcm_pmd_cpu_crypto_process,
+
 		.sym_session_get_size	= aesni_gcm_pmd_sym_session_get_size,
 		.sym_session_configure	= aesni_gcm_pmd_sym_session_configure,
 		.sym_session_clear	= aesni_gcm_pmd_sym_session_clear
 };
 
 struct rte_cryptodev_ops *rte_aesni_gcm_pmd_ops = &aesni_gcm_pmd_ops;
+
diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_pmd_private.h b/drivers/crypto/aesni_gcm/aesni_gcm_pmd_private.h
index 2039adb53..dc8d3c653 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_pmd_private.h
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_pmd_private.h
@@ -73,6 +73,11 @@ enum aesni_gcm_operation {
 	AESNI_GMAC_OP_VERIFY
 };
 
+enum aesni_gcm_mode {
+	AESNI_GCM_MODE_ASYNC,
+	AESNI_GCM_MODE_SYNC
+};
+
 /** AESNI GCM private session structure */
 struct aesni_gcm_session {
 	struct {
@@ -90,8 +95,12 @@ struct aesni_gcm_session {
 	/**< GCM operation type */
 	enum aesni_gcm_key key;
 	/**< GCM key type */
+	enum aesni_gcm_mode mode;
+	/**< Sync/async mode */
 	struct gcm_key_data gdata_key;
 	/**< GCM parameters */
+	struct aesni_gcm_session_ops ops;
+	/**< Session handlers */
 };
 
 
@@ -109,10 +118,13 @@ aesni_gcm_set_session_parameters(const struct aesni_gcm_ops *ops,
 		struct aesni_gcm_session *sess,
 		const struct rte_crypto_sym_xform *xform);
 
-
-/**
- * Device specific operations function pointer structure */
+/* Device specific operations function pointer structure */
 extern struct rte_cryptodev_ops *rte_aesni_gcm_pmd_ops;
 
+/** CPU crypto bulk process handler */
+uint32_t
+aesni_gcm_pmd_cpu_crypto_process(struct rte_cryptodev *dev,
+	struct rte_cryptodev_sym_session *sess, union rte_crypto_sym_ofs ofs,
+	struct rte_crypto_sym_vec *vec);
 
 #endif /* _AESNI_GCM_PMD_PRIVATE_H_ */
-- 
2.17.1