[dpdk-dev] [PATCH v2 05/10] lib/librte_vhost: add head file

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

This patch adds public head file API for vhost crypto

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 lib/librte_vhost/rte_vhost_crypto.h | 122 ++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 lib/librte_vhost/rte_vhost_crypto.h

diff --git a/lib/librte_vhost/rte_vhost_crypto.h b/lib/librte_vhost/rte_vhost_crypto.h
new file mode 100644
index 000000000..1560fcc12
--- /dev/null
+++ b/lib/librte_vhost/rte_vhost_crypto.h
@@ -0,0 +1,122 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2017-2018 Intel Corporation
+ */
+
+#ifndef _VHOST_CRYPTO_H_
+#define _VHOST_CRYPTO_H_
+
+#include <linux/virtio_crypto.h>
+#include <rte_cryptodev.h>
+#include <rte_hash.h>
+#include <rte_pause.h>
+#include "rte_vhost.h"
+
+#ifndef MAX_DATA_QUEUES
+#define MAX_DATA_QUEUES	(1)
+#endif
+
+#define VIRTIO_CRYPTO_CTRL_QUEUE	(0)
+#define VIRTIO_CRYPTO_MAX_NUM_DEVS	(64)
+#define VIRTIO_CRYPTO_MAX_NUM_BURST_VQS	(64)
+
+/** Feature bits */
+#define VIRTIO_CRYPTO_F_CIPHER_SESSION_MODE	(1)
+#define VIRTIO_CRYPTO_F_HASH_SESSION_MODE	(2)
+#define VIRTIO_CRYPTO_F_MAC_SESSION_MODE	(3)
+#define VIRTIO_CRYPTO_F_AEAD_SESSION_MODE	(4)
+
+#define VHOST_CRYPTO_MBUF_POOL_SIZE		(8192)
+#define VHOST_CRYPTO_MAX_BURST_SIZE		(64)
+
+/**
+ *  Create Vhost-crypto instance
+ *
+ * @param vid
+ *  The identifier of the vhost device.
+ * @param cryptodev_id
+ *  The identifier of DPDK Cryptodev, the same cryptodev_id can be assigned to
+ *  multiple Vhost-crypto devices.
+ * @param sess_pool
+ *  The pointer to the created cryptodev session pool with the private data size
+ *  matches the target DPDK Cryptodev.
+ * @param socket_id
+ *  NUMA Socket ID to allocate resources on. *
+ * @return
+ *  0 if the Vhost Crypto Instance is created successfully.
+ *  Negative integer if otherwise
+ */
+int
+rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
+		struct rte_mempool *sess_pool, int socket_id);
+
+/**
+ *  Free the Vhost-crypto instance
+ *
+ * @param vid
+ *  The identifier of the vhost device.
+ * @return
+ *  0 if the Vhost Crypto Instance is created successfully.
+ *  Negative integer if otherwise.
+ */
+int
+rte_vhost_crypto_free(int vid);
+
+/**
+ *  Enable or disable zero copy feature
+ *
+ * @param vid
+ *  The identifier of the vhost device.
+ * @param enable_zc
+ *  Flag of zero copy feature, set 1 to enable or 0 to disable.
+ * @return
+ *  0 if completed successfully.
+ *  Negative integer if otherwise.
+ */
+int
+rte_vhost_crypto_set_zero_copy(int vid, uint32_t enable_zc);
+
+/**
+ * Fetch a number of vring descriptors from virt-queue and convert to DPDK
+ * crypto operations. After this function is executed, the user can enqueue
+ * the processed ops to the target cryptodev.
+ *
+ * @param vid
+ *  The identifier of the vhost device.
+ * @param qid
+ *  Virtio queue index.
+ * @param ops
+ *  The address of an array of pointers to *rte_crypto_op* structures.
+ * @param nb_ops
+ *  The maximum number of operations to be fetched and translated.
+ * @return
+ *  The number of fetched and processed vhost crypto request operations.
+ */
+uint16_t
+rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
+		struct rte_crypto_op **ops, uint16_t nb_ops);
+/**
+ * Finalize the dequeued crypto ops. After the converted crypto ops are
+ * dequeued from the cryptodev, this function shall be called to update the
+ * used-ring indexes and write the processed data back to the vring descriptor
+ * (if zero-copy is disabled).
+ *
+ * @param ops
+ *  The address of an array of *rte_crypto_op* structure that was dequeued
+ *  from cryptodev.
+ * @param nb_ops
+ *  The number of operations contained in the array.
+ * @callfds
+ *  The pointer to the array that the owner callfd number(s) of the
+ *  virtio-crypto requests contained in the cryptodev operations finalized to
+ *  be written back. The size of the array shall be no less than the number
+ *  of total virtual devices possible.
+ * @nb_callfds
+ *  The number of call_fd numbers contained in the callfds array.
+ * @return
+ *  The number of ops processed.
+ */
+uint16_t
+rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
+		uint16_t nb_ops, int *callfds, uint16_t *nb_callfds);
+
+#endif /**< _VHOST_CRYPTO_H_ */
-- 
2.13.6