[dpdk-dev] [PATCH] crypto/virtio: fix iv physical address

[Fan Zhang <roy.fan.zhang@intel.com>]

The physical address of IV required by Virtio was computed using
crypto operations' physical address plus the offset. However not
all crypto ops will have physical address field initialized and
compute it runtimely is costly. This patch fixes this problem by
adding iv field in virtio_crypto_op_cookie and does a memcpy of
iv instead.

Fixes: 82adb12a1fce ("crypto/virtio: support burst enqueue/dequeue")
Cc: stable@dpdk.org

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 drivers/crypto/virtio/virtio_cryptodev.c | 6 ++++++
 drivers/crypto/virtio/virtio_cryptodev.h | 3 +++
 drivers/crypto/virtio/virtio_rxtx.c      | 8 +++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/virtio/virtio_cryptodev.c b/drivers/crypto/virtio/virtio_cryptodev.c
index df88953f6..6ffa7619c 100644
--- a/drivers/crypto/virtio/virtio_cryptodev.c
+++ b/drivers/crypto/virtio/virtio_cryptodev.c
@@ -1223,6 +1223,12 @@ virtio_crypto_sym_pad_op_ctrl_req(
 	/* Get cipher xform from crypto xform chain */
 	cipher_xform = virtio_crypto_get_cipher_xform(xform);
 	if (cipher_xform) {
+		if (cipher_xform->iv.length > VIRTIO_CRYPTO_MAX_IV_SIZE) {
+			VIRTIO_CRYPTO_SESSION_LOG_ERR(
+				"cipher IV cannot longer than %u",
+				VIRTIO_CRYPTO_MAX_IV_SIZE);
+			return -1;
+		}
 		if (is_chainned)
 			ret = virtio_crypto_sym_pad_cipher_param(
 				&ctrl->u.sym_create_session.u.chain.para
diff --git a/drivers/crypto/virtio/virtio_cryptodev.h b/drivers/crypto/virtio/virtio_cryptodev.h
index e402c0309..676e008d9 100644
--- a/drivers/crypto/virtio/virtio_cryptodev.h
+++ b/drivers/crypto/virtio/virtio_cryptodev.h
@@ -16,6 +16,8 @@
 
 #define NUM_ENTRY_VIRTIO_CRYPTO_OP 7
 
+#define VIRTIO_CRYPTO_MAX_IV_SIZE 32
+
 extern uint8_t cryptodev_virtio_driver_id;
 
 enum virtio_crypto_cmd_id {
@@ -29,6 +31,7 @@ struct virtio_crypto_op_cookie {
 	struct virtio_crypto_op_data_req data_req;
 	struct virtio_crypto_inhdr inhdr;
 	struct vring_desc desc[NUM_ENTRY_VIRTIO_CRYPTO_OP];
+	uint8_t iv[VIRTIO_CRYPTO_MAX_IV_SIZE];
 };
 
 /*
diff --git a/drivers/crypto/virtio/virtio_rxtx.c b/drivers/crypto/virtio/virtio_rxtx.c
index 450392843..1b16221d0 100644
--- a/drivers/crypto/virtio/virtio_rxtx.c
+++ b/drivers/crypto/virtio/virtio_rxtx.c
@@ -203,6 +203,8 @@ virtqueue_crypto_sym_enqueue_xmit(
 	uint16_t req_data_len = sizeof(struct virtio_crypto_op_data_req);
 	uint32_t indirect_vring_addr_offset = req_data_len +
 		sizeof(struct virtio_crypto_inhdr);
+	uint32_t indirect_iv_addr_offset = indirect_vring_addr_offset +
+			sizeof(struct vring_desc) * NUM_ENTRY_VIRTIO_CRYPTO_OP;
 	struct rte_crypto_sym_op *sym_op = cop->sym;
 	struct virtio_crypto_session *session =
 		(struct virtio_crypto_session *)get_session_private_data(
@@ -259,7 +261,11 @@ virtqueue_crypto_sym_enqueue_xmit(
 
 	/* indirect vring: iv of cipher */
 	if (session->iv.length) {
-		desc[idx].addr = cop->phys_addr + session->iv.offset;
+		rte_memcpy(crypto_op_cookie->iv, rte_crypto_op_ctod_offset(cop,
+				uint8_t *, session->iv.offset),
+				session->iv.length);
+		desc[idx].addr = indirect_op_data_req_phys_addr +
+				indirect_iv_addr_offset;
 		desc[idx].len = session->iv.length;
 		desc[idx++].flags = VRING_DESC_F_NEXT;
 	}
-- 
2.13.6