[dpdk-dev] [RFC PATCH v4 2/4] eventtimer: add common code

[Erik Gabriel Carrillo <erik.g.carrillo@intel.com>]

This commit adds the logic that is shared by all event timer adapter
drivers; the common code handles instance allocation and some
initialization.

Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
---
 drivers/event/sw/sw_evdev.c                        |  16 +
 lib/librte_eventdev/Makefile                       |   2 +
 lib/librte_eventdev/rte_event_timer_adapter.c      | 414 +++++++++++++++++++++
 .../rte_event_timer_adapter_driver.h               | 159 ++++++++
 lib/librte_eventdev/rte_eventdev.h                 |   3 +
 lib/librte_eventdev/rte_eventdev_pmd.h             |   7 +
 lib/librte_eventdev/rte_eventdev_version.map       |  15 +-
 7 files changed, 615 insertions(+), 1 deletion(-)
 create mode 100644 lib/librte_eventdev/rte_event_timer_adapter.c
 create mode 100644 lib/librte_eventdev/rte_event_timer_adapter_driver.h

diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
index fd11079..cba8c8c 100644
--- a/drivers/event/sw/sw_evdev.c
+++ b/drivers/event/sw/sw_evdev.c
@@ -435,6 +435,20 @@ sw_eth_rx_adapter_caps_get(const struct rte_eventdev *dev,
 	return 0;
 }
 
+static int
+sw_timer_adapter_caps_get(const struct rte_eventdev *dev,
+			  uint32_t *caps,
+			  const struct rte_event_timer_adapter_ops **ops)
+{
+	RTE_SET_USED(dev);
+	*caps = 0;
+
+	/* Use default SW ops */
+	*ops = NULL;
+
+	return 0;
+}
+
 static void
 sw_info_get(struct rte_eventdev *dev, struct rte_event_dev_info *info)
 {
@@ -755,6 +769,8 @@ sw_probe(struct rte_vdev_device *vdev)
 
 			.eth_rx_adapter_caps_get = sw_eth_rx_adapter_caps_get,
 
+			.timer_adapter_caps_get = sw_timer_adapter_caps_get,
+
 			.xstats_get = sw_xstats_get,
 			.xstats_get_names = sw_xstats_get_names,
 			.xstats_get_by_name = sw_xstats_get_by_name,
diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index 6ef7c1c..ad1a5db 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -45,6 +45,7 @@ LDLIBS += -lrte_eal -lrte_ring -lrte_ethdev -lrte_hash
 SRCS-y += rte_eventdev.c
 SRCS-y += rte_event_ring.c
 SRCS-y += rte_event_eth_rx_adapter.c
+SRCS-y += rte_event_timer_adapter.c
 
 # export include files
 SYMLINK-y-include += rte_eventdev.h
@@ -54,6 +55,7 @@ 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_timer_adapter.h
+SYMLINK-y-include += rte_event_timer_adapter_driver.h
 
 # versioning export map
 EXPORT_MAP := rte_eventdev_version.map
diff --git a/lib/librte_eventdev/rte_event_timer_adapter.c b/lib/librte_eventdev/rte_event_timer_adapter.c
new file mode 100644
index 0000000..7708e2b
--- /dev/null
+++ b/lib/librte_eventdev/rte_event_timer_adapter.c
@@ -0,0 +1,414 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. 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.
+ */
+
+#include <string.h>
+
+#include <rte_memzone.h>
+#include <rte_memory.h>
+#include <rte_dev.h>
+#include <rte_errno.h>
+
+#include "rte_eventdev.h"
+#include "rte_eventdev_pmd.h"
+#include "rte_event_timer_adapter.h"
+#include "rte_event_timer_adapter_driver.h"
+
+#define MAX_EVENT_TIMER_ADAPTERS 64
+#define DATA_MZ_NAME_MAX_LEN 64
+#define DATA_MZ_NAME_FORMAT "rte_event_timer_adapter_data_%d"
+
+static struct rte_event_timer_adapter adapters[MAX_EVENT_TIMER_ADAPTERS];
+
+static inline int
+adapter_valid(const struct rte_event_timer_adapter *adapter)
+{
+	return adapter != NULL && adapter->allocated == 1;
+}
+
+#define ADAPTER_VALID_OR_ERR_RET(adapter, retval) do { \
+	if (!adapter_valid(adapter))		       \
+		return retval;			       \
+} while (0)
+
+#define FUNC_PTR_OR_ERR_RET(func, errval) do { \
+	if ((func) == NULL)		       \
+		return errval;		       \
+} while (0)
+
+#define FUNC_PTR_OR_NULL_RET_WITH_ERRNO(func, errval) do { \
+	if ((func) == NULL) {				   \
+		rte_errno = errval;			   \
+		return NULL;				   \
+	}						   \
+} while (0)
+
+static int
+default_port_conf_cb(uint16_t id, uint8_t event_dev_id, uint8_t *event_port_id,
+		     void *conf_arg)
+{
+	struct rte_event_timer_adapter *adapter;
+	struct rte_eventdev *dev;
+	struct rte_event_dev_config dev_conf;
+	struct rte_event_port_conf *port_conf = conf_arg;
+	int started;
+	uint8_t port_id;
+	uint8_t dev_id;
+	int ret;
+
+	RTE_SET_USED(event_dev_id);
+
+	adapter = &adapters[id];
+	dev = &rte_eventdevs[adapter->data->event_dev_id];
+	dev_id = dev->data->dev_id;
+	dev_conf = dev->data->dev_conf;
+
+	started = dev->data->dev_started;
+	if (started)
+		rte_event_dev_stop(dev_id);
+
+	port_id = dev_conf.nb_event_ports;
+	dev_conf.nb_event_ports += 1;
+	ret = rte_event_dev_configure(dev_id, &dev_conf);
+	if (ret < 0) {
+		if (started)
+			rte_event_dev_start(dev_id);
+
+		return ret;
+	}
+
+	ret = rte_event_port_setup(dev_id, port_id, port_conf);
+	if (ret < 0)
+		return ret;
+
+	*event_port_id = port_id;
+
+	if (started)
+		rte_event_dev_start(dev_id);
+
+	return 0;
+}
+
+struct rte_event_timer_adapter *
+rte_event_timer_adapter_create(const struct rte_event_timer_adapter_conf *conf)
+{
+	/* default port conf values */
+	struct rte_event_port_conf port_conf = {
+		.new_event_threshold = 128,
+		.dequeue_depth = 32,
+		.enqueue_depth = 32
+	};
+
+	return rte_event_timer_adapter_create_ext(conf, default_port_conf_cb,
+						  &port_conf);
+}
+
+struct rte_event_timer_adapter *
+rte_event_timer_adapter_create_ext(
+		const struct rte_event_timer_adapter_conf *conf,
+		rte_event_timer_adapter_port_conf_cb_t conf_cb,
+		void *conf_arg)
+{
+	uint16_t adapter_id;
+	struct rte_event_timer_adapter *adapter;
+	const struct rte_memzone *mz;
+	char mz_name[DATA_MZ_NAME_MAX_LEN];
+	int n, ret;
+	struct rte_eventdev *dev;
+
+	if (conf == NULL) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+
+	/* Check eventdev ID */
+	if (!rte_event_pmd_is_valid_dev(conf->event_dev_id)) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+	dev = &rte_eventdevs[conf->event_dev_id];
+
+	adapter_id = conf->timer_adapter_id;
+
+	/* Check adapter ID not already allocated */
+	adapter = &adapters[adapter_id];
+	if (adapter->allocated) {
+		rte_errno = -EEXIST;
+		return NULL;
+	}
+
+	/* Create shared data area. */
+	n = snprintf(mz_name, sizeof(mz_name), DATA_MZ_NAME_FORMAT, adapter_id);
+	if (n >= (int)sizeof(mz_name)) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+	mz = rte_memzone_reserve(mz_name,
+				 sizeof(struct rte_event_timer_adapter_data),
+				 conf->socket_id, 0);
+	if (mz == NULL)
+		/* rte_errno set by rte_memzone_reserve */
+		return NULL;
+
+	adapter->data = mz->addr;
+	memset(adapter->data, 0, sizeof(struct rte_event_timer_adapter_data));
+
+	adapter->data->mz = mz;
+	adapter->data->event_dev_id = conf->event_dev_id;
+	adapter->data->id = adapter_id;
+	adapter->data->socket_id = conf->socket_id;
+	adapter->data->conf = *conf;  /* copy conf structure */
+
+	/* Query eventdev PMD for timer adapter capabilities and ops */
+	ret = dev->dev_ops->timer_adapter_caps_get(dev,
+						   &adapter->data->caps,
+						   &adapter->ops);
+	if (ret < 0) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+
+	if (!(adapter->data->caps &
+	      RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT)) {
+		FUNC_PTR_OR_NULL_RET_WITH_ERRNO(conf_cb, -EINVAL);
+		ret = conf_cb(adapter->data->id, adapter->data->event_dev_id,
+			      &adapter->data->event_port_id, conf_arg);
+		if (ret < 0) {
+			rte_errno = -EINVAL;
+			return NULL;
+		}
+	}
+
+	/* Allow driver to do some setup */
+	FUNC_PTR_OR_NULL_RET_WITH_ERRNO(adapter->ops->init, -ENOTSUP);
+	ret = adapter->ops->init(adapter);
+	if (ret < 0) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+
+	/* Set fast-path function pointers */
+	adapter->arm_burst = adapter->ops->arm_burst;
+	adapter->arm_tmo_tick_burst = adapter->ops->arm_tmo_tick_burst;
+	adapter->cancel_burst = adapter->ops->cancel_burst;
+
+	adapter->allocated = 1;
+
+	return adapter;
+}
+
+int
+rte_event_timer_adapter_get_info(const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer_adapter_info *adapter_info)
+{
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+
+	if (adapter->ops->get_info)
+		/* let driver set values it knows */
+		adapter->ops->get_info(adapter, adapter_info);
+
+	/* Set common values */
+	adapter_info->conf = adapter->data->conf;
+	adapter_info->event_dev_port_id = adapter->data->event_port_id;
+	adapter_info->caps = adapter->data->caps;
+
+	return 0;
+}
+
+int
+rte_event_timer_adapter_start(const struct rte_event_timer_adapter *adapter)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->ops->start, -EINVAL);
+
+	ret = adapter->ops->start(adapter);
+	if (ret < 0)
+		return ret;
+
+	adapter->data->started = 1;
+
+	return 0;
+}
+
+int
+rte_event_timer_adapter_stop(const struct rte_event_timer_adapter *adapter)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->ops->stop, -EINVAL);
+
+	ret = adapter->ops->stop(adapter);
+	if (ret < 0)
+		return ret;
+
+	adapter->data->started = 0;
+
+	return 0;
+}
+
+struct rte_event_timer_adapter *
+rte_event_timer_adapter_lookup(uint16_t adapter_id)
+{
+	char name[DATA_MZ_NAME_MAX_LEN];
+	const struct rte_memzone *mz;
+	struct rte_event_timer_adapter_data *data;
+	struct rte_event_timer_adapter *adapter;
+	int ret;
+	struct rte_eventdev *dev;
+
+	if (adapters[adapter_id].allocated)
+		return &adapters[adapter_id]; /* Adapter is already loaded */
+
+	snprintf(name, DATA_MZ_NAME_MAX_LEN, DATA_MZ_NAME_FORMAT, adapter_id);
+	mz = rte_memzone_lookup(name);
+	if (mz == NULL) {
+		rte_errno = -ENOENT;
+		return NULL;
+	}
+
+	data = mz->addr;
+
+	adapter = &adapters[data->id];
+	adapter->data = data;
+
+	dev = &rte_eventdevs[adapter->data->event_dev_id];
+
+	/* Query eventdev PMD for timer adapter capabilities and ops */
+	ret = dev->dev_ops->timer_adapter_caps_get(dev,
+						   &adapter->data->caps,
+						   &adapter->ops);
+	if (ret < 0) {
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+
+	/* Set fast-path function pointers */
+	adapter->arm_burst = adapter->ops->arm_burst;
+	adapter->arm_tmo_tick_burst = adapter->ops->arm_tmo_tick_burst;
+	adapter->cancel_burst = adapter->ops->cancel_burst;
+
+	adapter->allocated = 1;
+
+	return adapter;
+}
+
+int
+rte_event_timer_adapter_free(struct rte_event_timer_adapter *adapter)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->ops->uninit, -EINVAL);
+
+	/* free impl priv data */
+	ret = adapter->ops->uninit(adapter);
+	if (ret < 0)
+		return ret;
+
+	/* free shared data area */
+	ret = rte_memzone_free(adapter->data->mz);
+	if (ret < 0)
+		return ret;
+
+	adapter->data = NULL;
+	adapter->allocated = 0;
+
+	return 0;
+}
+
+int
+rte_event_timer_arm_burst(const struct rte_event_timer_adapter *adapter,
+			  struct rte_event_timer **event_timers,
+			  uint16_t nb_event_timers)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->arm_burst, -EINVAL);
+
+	if (!adapter->data->started)
+		return -EAGAIN;
+
+	ret = adapter->arm_burst(adapter, event_timers, nb_event_timers);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int
+rte_event_timer_arm_tmo_tick_burst(
+			const struct rte_event_timer_adapter *adapter,
+			struct rte_event_timer **event_timers,
+			const uint64_t timeout_ticks,
+			const uint16_t nb_event_timers)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->arm_tmo_tick_burst, -EINVAL);
+
+	if (!adapter->data->started)
+		return -EAGAIN;
+
+	for (int i = 0; i < nb_event_timers; i++)
+		event_timers[i]->timeout_ticks = timeout_ticks;
+
+	ret = adapter->arm_tmo_tick_burst(adapter, event_timers, timeout_ticks,
+					  nb_event_timers);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int
+rte_event_timer_cancel_burst(const struct rte_event_timer_adapter *adapter,
+			     struct rte_event_timer **event_timers,
+			     uint16_t nb_event_timers)
+{
+	int ret;
+
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+	FUNC_PTR_OR_ERR_RET(adapter->cancel_burst, -EINVAL);
+
+	if (!adapter->data->started)
+		return -EAGAIN;
+
+	ret = adapter->cancel_burst(adapter, event_timers, nb_event_timers);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
diff --git a/lib/librte_eventdev/rte_event_timer_adapter_driver.h b/lib/librte_eventdev/rte_event_timer_adapter_driver.h
new file mode 100644
index 0000000..485fad1
--- /dev/null
+++ b/lib/librte_eventdev/rte_event_timer_adapter_driver.h
@@ -0,0 +1,159 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. 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_TIMER_ADAPTER_DRIVER_H__
+#define __RTE_EVENT_TIMER_ADAPTER_DRIVER_H__
+
+/**
+ * @file
+ *
+ * Description
+ *
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "rte_event_timer_adapter.h"
+
+/*
+ * Definitions of functions exported by an event timer adapter implementation
+ * through *rte_event_timer_adapter_ops* structure supplied in the
+ * *rte_event_timer_adapter* structure associated with an event timer adapter.
+ */
+
+typedef int (*rte_event_timer_adapter_init_t)(
+		struct rte_event_timer_adapter *adapter);
+/**< @internal Event timer adapter implementation setup */
+typedef int (*rte_event_timer_adapter_uninit_t)(
+		struct rte_event_timer_adapter *adapter);
+/**< @internal Event timer adapter implementation teardown */
+typedef int (*rte_event_timer_adapter_start_t)(
+		const struct rte_event_timer_adapter *adapter);
+/**< @internal Start running event timer adapter */
+typedef int (*rte_event_timer_adapter_stop_t)(
+		const struct rte_event_timer_adapter *adapter);
+/**< @internal Stop running event timer adapter */
+typedef void (*rte_event_timer_adapter_get_info_t)(
+		const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer_adapter_info *adapter_info);
+/**< @internal Get contextual information for event timer adapter */
+typedef int (*rte_event_timer_arm_burst_t)(
+		const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer **tims,
+		uint16_t nb_tims);
+/**< @internal Enable event timers to enqueue timer events upon expiry */
+typedef int (*rte_event_timer_arm_tmo_tick_burst_t)(
+		const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer **tims,
+		uint64_t timeout_tick,
+		uint16_t nb_tims);
+/**< @internal Enable event timers with common expiration time */
+typedef int (*rte_event_timer_cancel_burst_t)(
+		const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer **tims,
+		uint16_t nb_tims);
+/**< @internal Prevent event timers from enqueuing timer events */
+
+/**
+ * @internal Structure containing the functions exported by an event timer
+ * adapter implementation.
+ */
+struct rte_event_timer_adapter_ops {
+	rte_event_timer_adapter_init_t		init;  /**< Set up adapter */
+	rte_event_timer_adapter_uninit_t	uninit;/**< Tear down adapter */
+	rte_event_timer_adapter_start_t		start; /**< Start adapter */
+	rte_event_timer_adapter_stop_t		stop;  /**< Stop adapter */
+	rte_event_timer_adapter_get_info_t	get_info;
+	/**< Get info from driver */
+	rte_event_timer_arm_burst_t		arm_burst;
+	/**< Arm one or more event timers */
+	rte_event_timer_arm_tmo_tick_burst_t	arm_tmo_tick_burst;
+	/**< Arm event timers with same expiration time */
+	rte_event_timer_cancel_burst_t		cancel_burst;
+	/**< Cancel one or more event timers */
+};
+
+/**
+ * @internal Adapter data; structure to be placed in shared memory to be
+ * accessible by various processes in a multi-process configuration.
+ */
+struct rte_event_timer_adapter_data {
+	uint8_t id;
+	/**< Event timer adapter ID */
+	uint8_t event_dev_id;
+	/**< Event device ID */
+	uint32_t socket_id;
+	/**< Socket ID where memory is allocated */
+	uint8_t event_port_id;
+	/**< Optional: event port ID used when the inbuilt port is absent */
+	const struct rte_memzone *mz;
+	/**< Event timer adapter memzone pointer */
+	struct rte_event_timer_adapter_conf conf;
+	/**< Configuration used to configure the adapter. */
+	uint32_t caps;
+	/**< Adapter capabilities */
+	void *adapter_priv;
+	/**< Timer adapter private data*/
+
+	RTE_STD_C11
+	uint8_t started : 1;
+	/**< Flag to indicate adapter started. */
+} __rte_cache_aligned;
+
+/**
+ * @internal Data structure associated with each event timer adapter.
+ */
+struct rte_event_timer_adapter {
+	rte_event_timer_arm_burst_t arm_burst;
+	/**< Pointer to driver arm_burst function. */
+	rte_event_timer_arm_tmo_tick_burst_t arm_tmo_tick_burst;
+	/**< Pointer to driver arm_tmo_tick_burst function. */
+	rte_event_timer_cancel_burst_t cancel_burst;
+	/**< Pointer to driver cancel function. */
+
+	struct rte_event_timer_adapter_data *data;
+	/**< Pointer to shared adapter data */
+	const struct rte_event_timer_adapter_ops *ops;
+	/**< Functions exported by adapter driver */
+
+	RTE_STD_C11
+	uint8_t allocated : 1;
+	/**< Flag to indicate that this adapter has been allocated */
+} __rte_cache_aligned;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __RTE_EVENT_TIMER_ADAPTER_DRIVER_H__ */
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index a650f7a..e72da76 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -1025,6 +1025,9 @@ struct rte_event {
  * @see struct rte_event_eth_rx_adapter_queue_conf::rx_queue_flags
  */
 
+#define RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT (1ULL << 1)
+/**< This flag is set when the timer mechanism is in HW. */
+
 /**
  * Retrieve the event device's ethdev Rx adapter capabilities for the
  * specified ethernet port
diff --git a/lib/librte_eventdev/rte_eventdev_pmd.h b/lib/librte_eventdev/rte_eventdev_pmd.h
index 7a206c5..719fde3 100644
--- a/lib/librte_eventdev/rte_eventdev_pmd.h
+++ b/lib/librte_eventdev/rte_eventdev_pmd.h
@@ -52,6 +52,7 @@ extern "C" {
 #include <rte_malloc.h>
 
 #include "rte_eventdev.h"
+#include "rte_event_timer_adapter_driver.h"
 
 /* Logging Macros */
 #define RTE_EDEV_LOG_ERR(...) \
@@ -466,6 +467,9 @@ typedef int (*eventdev_eth_rx_adapter_caps_get_t)
 
 struct rte_event_eth_rx_adapter_queue_conf *queue_conf;
 
+typedef int (*eventdev_timer_adapter_caps_get_t)(const struct rte_eventdev *dev,
+		uint32_t *caps, const struct rte_event_timer_adapter_ops **ops);
+
 /**
  * Add ethernet Rx queues to event device. This callback is invoked if
  * the caps returned from rte_eventdev_eth_rx_adapter_caps_get(, eth_port_id)
@@ -650,6 +654,9 @@ struct rte_eventdev_ops {
 	/**< Get ethernet Rx stats */
 	eventdev_eth_rx_adapter_stats_reset eth_rx_adapter_stats_reset;
 	/**< Reset ethernet Rx stats */
+
+	eventdev_timer_adapter_caps_get_t timer_adapter_caps_get;
+	/**< Get timer adapter capabilities */
 };
 
 /**
diff --git a/lib/librte_eventdev/rte_eventdev_version.map b/lib/librte_eventdev/rte_eventdev_version.map
index 108ae61..f56ca0f 100644
--- a/lib/librte_eventdev/rte_eventdev_version.map
+++ b/lib/librte_eventdev/rte_eventdev_version.map
@@ -66,5 +66,18 @@ DPDK_17.11 {
 	rte_event_eth_rx_adapter_stats_get;
 	rte_event_eth_rx_adapter_stats_reset;
 	rte_event_eth_rx_adapter_stop;
-
 } DPDK_17.08;
+
+DPDK_18.02 {
+	global:
+
+	rte_event_timer_adapter_create;
+	rte_event_timer_adapter_create_ext;
+	rte_event_timer_adapter_free;
+	rte_event_timer_adapter_get_info;
+	rte_event_timer_adapter_start;
+	rte_event_timer_adapter_stop;
+	rte_event_timer_arm_burst;
+	rte_event_timer_arm_tmo_tick_burst;
+	rte_event_timer_cancel_burst;
+} DPDK_17.11;
-- 
2.6.4