[dpdk-dev] [RFC v2, 2/2] eventdev: add crypto adapter API header

[Abhinandan Gujjar <abhinandan.gujjar@intel.com>]

Add crypto event adapter APIs to support packet transfer
mechanism between cryptodev and event device.

Signed-off-by: Abhinandan Gujjar <abhinandan.gujjar@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Gage Eads <gage.eads@intel.com>
---
Notes:
	V2:
	1. Updated type as ENQ-DEQ in rte_event_crypto_adapter_type
	2. Removed enum rte_event_crypto_conf_type
	3. Updated struct rte_event_crypto_metadata
	4. Removed struct rte_event_crypto_queue_pair_conf
	5. Updated rte_event_crypto_adapter_queue_pair_add() API

 lib/librte_eventdev/Makefile                   |   1 +
 lib/librte_eventdev/rte_event_crypto_adapter.h | 452 +++++++++++++++++++++++++
 2 files changed, 453 insertions(+)
 create mode 100644 lib/librte_eventdev/rte_event_crypto_adapter.h

diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index 7fd78c7..a5a6214 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -27,6 +27,7 @@ SYMLINK-y-include += rte_eventdev_pmd_pci.h
 SYMLINK-y-include += rte_eventdev_pmd_vdev.h
 SYMLINK-y-include += rte_event_ring.h
 SYMLINK-y-include += rte_event_eth_rx_adapter.h
+SYMLINK-y-include += rte_event_crypto_adapter.h
 
 # versioning export map
 EXPORT_MAP := rte_eventdev_version.map
diff --git a/lib/librte_eventdev/rte_event_crypto_adapter.h b/lib/librte_eventdev/rte_event_crypto_adapter.h
new file mode 100644
index 0000000..e90b57e
--- /dev/null
+++ b/lib/librte_eventdev/rte_event_crypto_adapter.h
@@ -0,0 +1,452 @@
+/*
+ *   Copyright(c) 2018 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_EVENT_CRYPTO_ADAPTER_
+#define _RTE_EVENT_CRYPTO_ADAPTER_
+
+/**
+ * This adapter adds support to enqueue crypto completions to event device.
+ * The packet flow from cryptodev to the event device can be accomplished
+ * using both SW and HW based transfer mechanisms.
+ * The adapter uses a EAL service core function for SW based packet transfer
+ * and uses the eventdev PMD functions to configure HW based packet transfer
+ * between the cryptodev and the event device.
+ *
+ * In the case of SW based transfers, application can choose to submit a
+ * crypto operation directly to cryptodev or send it  to the cryptodev
+ * adapter via eventdev, the cryptodev adapter then submits the crypto
+ * operation to the crypto device. The first mode is known as the
+ * dequeue only (DEQ) mode  and the second as the enqueue - dequeue
+ * (ENQ_DEQ) mode. The choice of mode can be specified when creating
+ * the adapter.
+ * In the latter choice, the cryptodev adapter is able to use
+ * RTE_OP_FORWARD as the event dev enqueue type, this has a performance
+ * advantage in "closed system" eventdevs like the eventdev SW PMD and
+ * also, the event cannot be dropped.
+ *
+ * In the ENQ_DEQ mode the application needs to specify the cryptodev ID
+ * and queue pair ID (request information) in addition to the event
+ * information (response information) needed to enqueue an event after
+ * the crypto operation has completed. The request and response information
+ * are specified in the rte_crypto_op private_data. In the DEQ mode the
+ * the application is required to provide only the response information.
+ *
+ * In the ENQ_DEQ mode, application sends crypto operations as events to
+ * the adapter which dequeues events and programs cryptodev operations.
+ * The adapter then dequeues crypto completions from cryptodev and
+ * enqueue events to the event device.
+ *
+ * In the case of HW based transfers, the cryptodev PMD callback invoked
+ * from rte_cryptodev_enqueue_burst() uses the response information to
+ * setup the event for the cryptodev completion.
+ *
+ * The event crypto adapter provides common APIs to configure the packet flow
+ * from the cryptodev to event devices across both SW and HW based transfers.
+ * The crypto event adapter's functions are:
+ *  - rte_event_crypto_adapter_create_ext()
+ *  - rte_event_crypto_adapter_create()
+ *  - rte_event_crypto_adapter_free()
+ *  - rte_event_crypto_adapter_queue_pair_add()
+ *  - rte_event_crypto_adapter_queue_pair_del()
+ *  - rte_event_crypto_adapter_start()
+ *  - rte_event_crypto_adapter_stop()
+ *  - rte_event_crypto_adapter_stats_get()
+ *  - rte_event_crypto_adapter_stats_reset()
+
+ * The applicaton creates an instance using rte_event_crypto_adapter_create()
+ * or rte_event_crypto_adapter_create_ext().
+ *
+ * Cryptodev queue pair addition/deletion is done
+ * using the rte_event_crypto_adapter_queue_pair_xxx() APIs.
+ *
+ * The SW adapter or HW PMD uses rte_crypto_op::private_data_type to decide
+ * whether request/response data is located in the crypto session/crypto
+ * security session or at an offset in the rte_crypto_op.
+ * rte_crypto_op::private_data_offset is used to locate the request/response
+ * in the rte_crypto_op. If the rte_crypto_op::private_data_type
+ * indicates that the data is in the crypto session/crypto security session
+ * then the rte_crypto_op::sess_type is used to decide whether the private
+ * data is in the session or security session.
+ *
+ * For session-less it is mandatory to place the request/response data with
+ * the rte_crypto_op where as with crypto session/security session it can be
+ * placed with the rte_crypto_op or in the session/security session.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <rte_service.h>
+
+#include "rte_eventdev.h"
+
+#define RTE_EVENT_CRYPTO_ADAPTER_MAX_INSTANCE 32
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this enum may change without prior notice
+ *
+ * Crypto event adapter type
+ */
+enum rte_event_crypto_adapter_type {
+	RTE_EVENT_CRYPTO_ADAPTER_DEQ_ONLY = 1,
+	/**< Start only dequeue part of crypto adapter.
+	 * Packets dequeued from cryptodev are enqueued to eventdev
+	 * as new events and events will be treated as RTE_EVENT_OP_NEW. */
+	RTE_EVENT_CRYPTO_ADAPTER_ENQ_DEQ,
+	/**< Start both enqueue & dequeue part of crypto adapter.
+	 * Packet's event context will be retained and
+	 * event will be treated as RTE_EVENT_OP_FORWARD. */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * Crypto event request structure will be fill by application to
+ * provide event request information to the adapter.
+ */
+struct rte_event_crypto_request {
+	uint8_t resv[8];
+	/**< Overlaps with first 8 bytes of struct rte_event
+	 * that encode the response event information
+	 */
+	uint16_t cdev_id;
+	/**< cryptodev ID to be used */
+	uint16_t queue_pair_id;
+	/**< cryptodev queue pair ID to be used */
+	uint32_t resv1;
+	/**< Reserved bits */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * Crypto event metadata structure will be filled by application
+ * to provide crypto request and event response information.
+ *
+ * If crypto events are enqueued using a HW mechanism, the cryptodev
+ * PMD will use the event response information to set up the event
+ * that is enqueued back to eventdev after completion of the crypto
+ * operation. If the transfer is done by SW, it will be used by the
+ * adapter.
+ */
+union rte_event_crypto_metadata {
+	struct rte_event_crypto_request request_info;
+	struct rte_event response_info;
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * Adapter configuration structure that the adapter configuration callback
+ * function is expected to fill out
+ * @see rte_event_crypto_adapter_conf_cb
+ */
+struct rte_event_crypto_adapter_conf {
+	uint8_t event_port_id;
+	/**< Event port identifier, the adapter enqueues mbuf events to this
+	 * port.
+	 */
+	uint32_t max_nb;
+	/**< The adapter can return early if it has processed at least
+	 * max_nb crypto ops. This isn't treated as a requirement; batching may
+	 * cause the adapter to process more than max_nb crypto ops.
+	 */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Function type used for adapter configuration callback. The callback is
+ * used to fill in members of the struct rte_event_crypto_adapter_conf, this
+ * callback is invoked when creating a SW service for packet transfer from
+ * cryptodev queue pair to the event device. The SW service is created within
+ * the rte_event_crypto_adapter_queue_add() function if SW based packet
+ * transfers from cryptodev queue pair to the event device are required.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param dev_id
+ *  Crypto device identifier.
+ *
+ * @param [out] conf
+ *  Structure that needs to be populated by this callback.
+ *
+ * @param arg
+ *  Argument to the callback. This is the same as the conf_arg passed to the
+ *  rte_event_crypto_adapter_create_ext().
+ */
+typedef int (*rte_event_crypto_adapter_conf_cb) (uint8_t id, uint8_t cdev_id,
+			struct rte_event_crypto_adapter_conf *conf,
+			void *arg);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * A structure used to retrieve statistics for an event crypto adapter
+ * instance.
+ */
+
+struct rte_event_crypto_adapter_stats {
+	uint64_t event_poll_count;
+	/**< Event port poll count */
+	uint64_t event_dequeue_count;
+	/**< Event dequeue count */
+	uint64_t crypto_enq_fail;
+	/**< Cryptodev enqueue failed count */
+	uint64_t crypto_deq_count;
+	/**< Cryptodev dequeue count */
+	uint64_t event_enq_retry_count;
+	/**< Event enqueue retry count */
+	uint64_t event_enq_fail_count;
+	/**< Event enqueue fail count */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Create a new event crypto adapter with the specified identifier.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param cdev_id
+ *  Crypto device identifier.
+ *
+ * @param conf_cb
+ *  Callback function that fills in members of a
+ *  struct rte_event_crypto_adapter_conf struct passed into
+ *  it.
+ *
+ * @param conf_arg
+ *  Argument that is passed to the conf_cb function.
+ *
+ * @return
+ *   - 0: Success
+ *   - <0: Error code on failure
+ */
+int rte_event_crypto_adapter_create_ext(uint8_t id, uint8_t cdev_id,
+				rte_event_crypto_adapter_conf_cb conf_cb,
+				void *conf_arg);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Create a new event crypto adapter with the specified identifier.
+ * This function uses an internal configuration function that creates an event
+ * port. This default function reconfigures the event device with an
+ * additional event port and setups up the event port using the port_config
+ * parameter passed into this function. In case the application needs more
+ * control in configuration of the service, it should use the
+ * rte_event_crypto_adapter_create_ext() version.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param cdev_id
+ *  Crypto device identifier.
+ *
+ * @param port_config
+ *  Argument of type *rte_event_port_conf* that is passed to the conf_cb
+ *  function.
+ *
+ * @return
+ *   - 0: Success
+ *   - <0: Error code on failure
+ */
+int rte_event_crypto_adapter_create(uint8_t id, uint8_t cdev_id,
+				    struct rte_event_port_conf *port_config);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Free an event crypto adapter
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @return
+ *   - 0: Success
+ *   - <0: Error code on failure, If the adapter still has queue pairs
+ *      added to it, the function returns -EBUSY.
+ */
+int rte_event_crypto_adapter_free(uint8_t id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Add a queue pair to an event crypto adapter.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param cdev_id
+ *  Cryptodev identifier.
+ *
+ * @param queue_pair_id
+ *  Cryptodev queue pair identifier. If queue_pair_id is set -1,
+ *  adapter adds all the pre configured queue pairs to the instance.
+ *
+ *
+ * @return
+ *  - 0: Success, Receive queue pair added correctly.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_queue_pair_add(uint8_t id,
+			uint8_t cdev_id,
+			int32_t queue_pair_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Delete a queue pair from an event crypto adapter.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param cdev_id
+ *  Cryptodev identifier.
+ *
+ * @param queue_pair_id
+ *  Cryptodev queue pair identifier.
+ *
+ * @return
+ *  - 0: Success, queue pair deleted successfully.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_queue_pair_del(uint8_t id, uint8_t cdev_id,
+					    int32_t queue_pair_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Start event crypto adapter
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param type
+ *  Flag to indicate to start dequeue only or both enqueue & dequeue.
+ *
+ * @return
+ *  - 0: Success, Adapter started successfully.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_start(uint8_t id,
+				   enum rte_event_crypto_adapter_type type);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Stop event crypto adapter
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @return
+ *  - 0: Success, Adapter stopped successfully.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_stop(uint8_t id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Retrieve statistics for an adapter
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param [out] stats
+ *  A pointer to structure used to retrieve statistics for an adapter.
+ *
+ * @return
+ *  - 0: Success, retrieved successfully.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_stats_get(uint8_t id,
+				struct rte_event_crypto_adapter_stats *stats);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Reset statistics for an adapter.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @return
+ *  - 0: Success, statistics reset successfully.
+ *  - <0: Error code on failure.
+ */
+int rte_event_crypto_adapter_stats_reset(uint8_t id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Retrieve the service ID of an adapter. If the adapter doesn't use
+ * a rte_service function, this function returns -ESRCH.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param [out] service_id
+ *  A pointer to a uint32_t, to be filled in with the service id.
+ *
+ * @return
+ *  - 0: Success
+ *  - <0: Error code on failure, if the adapter doesn't use a rte_service
+ * function, this function returns -ESRCH.
+ */
+int rte_event_crypto_adapter_service_id_get(uint8_t id, uint32_t *service_id);
+
+#ifdef __cplusplus
+}
+#endif
+#endif	/* _RTE_EVENT_CRYPTO_ADAPTER_ */
-- 
1.9.1