From: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
To: pbhagavatula@caviumnetworks.com
Cc: dev@dpdk.org, jerin.jacob@caviumnetworks.com,
nipun.gupta@nxp.com, hemant.agrawal@nxp.com,
nikhil.rao@intel.com
Subject: [dpdk-dev] [RFC PATCH v4 1/4] eventtimer: introduce event timer adapter
Date: Tue, 28 Nov 2017 11:40:05 -0600 [thread overview]
Message-ID: <1511890808-6072-2-git-send-email-erik.g.carrillo@intel.com> (raw)
In-Reply-To: <1511890808-6072-1-git-send-email-erik.g.carrillo@intel.com>
Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
---
doc/api/doxy-api-index.md | 1 +
lib/librte_eventdev/Makefile | 1 +
lib/librte_eventdev/rte_event_timer_adapter.h | 427 ++++++++++++++++++++++++++
lib/librte_eventdev/rte_eventdev.h | 4 +-
4 files changed, 431 insertions(+), 2 deletions(-)
create mode 100644 lib/librte_eventdev/rte_event_timer_adapter.h
diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index 3492702..3110658 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -46,6 +46,7 @@ The public API headers are grouped by topics:
[security] (@ref rte_security.h),
[eventdev] (@ref rte_eventdev.h),
[event_eth_rx_adapter] (@ref rte_event_eth_rx_adapter.h),
+ [event_timer_adapter] (@ref rte_event_timer_adapter.h),
[metrics] (@ref rte_metrics.h),
[bitrate] (@ref rte_bitrate.h),
[latency] (@ref rte_latencystats.h),
diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index 5ac22cd..6ef7c1c 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -53,6 +53,7 @@ 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_timer_adapter.h
# versioning export map
EXPORT_MAP := rte_eventdev_version.map
diff --git a/lib/librte_eventdev/rte_event_timer_adapter.h b/lib/librte_eventdev/rte_event_timer_adapter.h
new file mode 100644
index 0000000..14661b5
--- /dev/null
+++ b/lib/librte_eventdev/rte_event_timer_adapter.h
@@ -0,0 +1,427 @@
+/*-
+ * 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_H__
+#define __RTE_EVENT_TIMER_ADAPTER_H__
+
+/**
+ * @file
+ *
+ * RTE Event Timer Adapter
+ *
+ * TODO: description
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_spinlock.h>
+#include <rte_memory.h>
+
+#include "rte_eventdev.h"
+
+#define RTE_EVENT_TIMER_ADAPTER_NUM_MAX 64
+
+/**
+ * Timer adapter clock source
+ */
+enum rte_event_timer_adapter_clk_src {
+ RTE_EVENT_TIMER_ADAPTER_CPU_CLK,
+ /**< Use CPU clock as the clock source. */
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK0,
+ /**< Platform dependent external clock source 0. */
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK1,
+ /**< Platform dependent external clock source 1. */
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK2,
+ /**< Platform dependent external clock source 2. */
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK3,
+ /**< Platform dependent external clock source 3. */
+};
+
+#define RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES (1ULL << 0)
+/**< The event timer adapter implementation may have constraints on the
+ * resolution (timer_tick_ns) and maximum timer expiry timeout(max_tmo_ns)
+ * based on the given timer adapter or system. If this flag is set, the
+ * implementation adjusts the resolution and maximum timeout to the best
+ * possible configuration. On successful timer adapter creation, the
+ * application can get the configured resolution and max timeout with
+ * ``rte_event_timer_adapter_get_info()``.
+ */
+#define RTE_EVENT_TIMER_ADAPTER_F_SP_PUT (1ULL << 1)
+/**< ``rte_event_timer_arm_burst()`` API to be used in single producer mode.
+ *
+ * @see struct rte_event_timer_adapter_conf::flags
+ */
+
+/*
+ * Timer adapter configuration structure
+ */
+struct rte_event_timer_adapter_conf {
+ uint8_t event_dev_id;
+ /**< Event device identifier */
+ uint16_t timer_adapter_id;
+ /**< Event timer adapter identifier */
+ uint32_t socket_id;
+ /**< Identifer of socket from which to allocate memory for adapter */
+ enum rte_event_timer_adapter_clk_src clk_src;
+ /**< Clock source for timer adapter */
+ uint64_t timer_tick_ns;
+ /**< Timer adapter resolution in ns */
+ uint64_t max_tmo_ns;
+ /**< Maximum timer timeout(expiry) in ns */
+ uint64_t nb_timers;
+ /**< Total number of timers per adapter */
+ uint64_t flags;
+ /**< Timer adapter config flags (RTE_EVENT_TIMER_ADAPTER_F_*) */
+};
+
+struct rte_event_timer_adapter;
+
+/*
+ * Callback function type for producer port creation.
+ */
+typedef int (*rte_event_timer_adapter_port_conf_cb_t)(uint16_t id,
+ uint8_t event_dev_id,
+ uint8_t *event_port_id,
+ void *conf_arg);
+
+/*
+ * Create an event timer adapter.
+ *
+ * This function must be invoked first before any other function in the API.
+ *
+ * @param conf
+ * The event timer adapter configuration structure.
+ *
+ * @return
+ * A pointer to the new allocated event timer adapter on success.
+ * NULL on error with rte_errno set appropriately.
+ * Possible rte_errno values include:
+ * - ERANGE: timer_tick_ns is not in supported range.
+ */
+struct rte_event_timer_adapter *rte_event_timer_adapter_create(
+ const struct rte_event_timer_adapter_conf *conf);
+
+/*
+ * Create a timer adapter with the supplied callback.
+ *
+ * This function can be used to have a more granular control over the timer
+ * adapter creation. If a built-in port is absent, then the function uses the
+ * callback provided to create and get the port id to be used as a producer
+ * port.
+ *
+ * @param conf
+ * The timer adapter configuration structure
+ * @param conf_cb
+ * The port config callback function.
+ * @param conf_arg
+ * Opaque pointer to the argument for the callback function
+ * @param id_ptr[out]
+ * Address of variable to store adapter identifier in
+ *
+ * @return
+ * A pointer to the new allocated event timer adapter on success.
+ * NULL on error with rte_errno set appropriately.
+ * Possible rte_errno values include:
+ * - ERANGE: timer_tick_ns is not in supported range.
+ * - ENOMEM: unable to allocate sufficient memory for adapter instances
+ * - EINVAL: invalid event device identifier specified in config
+ * - ENOSPC: maximum number of adapters already created
+ */
+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);
+
+/*
+ * Timer adapter info structure.
+ */
+struct rte_event_timer_adapter_info {
+ uint64_t min_resolution_ns;
+ /**< Minimum timer adapter resolution in ns */
+ uint64_t max_tmo_ns;
+ /**< Maximum timer timeout(expire) in ns */
+ struct rte_event_timer_adapter_conf conf;
+ /**< Configured timer adapter attributes */
+ uint32_t caps;
+ /**< Event timer adapter capabilities */
+ int16_t event_dev_port_id;
+ /**< Event device port ID, if applicable */
+ int32_t service_id;
+ /**< Service ID, if applicable */
+};
+
+/**
+ * Retrieve the contextual information of an event timer adapter.
+ *
+ * @param adapter
+ * A pointer to the event timer adapter structure.
+ *
+ * @param[out] adapter_info
+ * A pointer to a structure of type *rte_event_timer_adapter_info* to be
+ * filled with the contextual information of the adapter.
+ *
+ * @return
+ * - 0: Success, driver updates the contextual information of the
+ * timer adapter
+ * - <0: Error code returned by the driver info get function.
+ * - -EINVAL if adapter identifier invalid
+ *
+ * @see RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES,
+ * struct rte_event_timer_adapter_info
+ *
+ */
+int rte_event_timer_adapter_get_info(
+ const struct rte_event_timer_adapter *adapter,
+ struct rte_event_timer_adapter_info *adapter_info);
+
+/**
+ * Start a timer adapter.
+ *
+ * The adapter start step is the last one and consists of setting the timer
+ * adapter to start accepting the timers and schedules to event queues.
+ *
+ * On success, all basic functions exported by the API (timer arm,
+ * timer cancel and so on) can be invoked.
+ *
+ * @param adapter
+ * A pointer to the event timer adapter structure.
+ *
+ * @return
+ * - 0: Success, adapter started.
+ * - <0: Error code returned by the driver start function.
+ * - -EINVAL if adapter identifier invalid
+ */
+int rte_event_timer_adapter_start(
+ const struct rte_event_timer_adapter *adapter);
+
+/**
+ * Stop an event timer adapter.
+ *
+ * The adapter can be restarted with a call to
+ * ``rte_event_timer_adapter_start()``.
+ *
+ * @param adapter
+ * A pointer to the event timer adapter structure.
+ *
+ * @return
+ * - 0: Success, adapter stopped.
+ * - <0: Error code returned by the driver stop function.
+ * - -EINVAL if adapter identifier invalid
+ */
+int rte_event_timer_adapter_stop(const struct rte_event_timer_adapter *adapter);
+
+/*
+ * Lookup an event timer adapter using its identifier.
+ *
+ * If an event timer adapter was created in another process with the same
+ * identifier, this function will locate its state and set up access to it
+ * so that it can be used in this process.
+ *
+ * @param adapter_id
+ * The event timer adapter identifier.
+ *
+ * @return
+ * A pointer to the event timer adapter matching the identifier on success.
+ * NULL on error with rte_errno set appropriately.
+ * Possible rte_errno values include:
+ * - ENOENT - required entry not available to return.
+ */
+struct rte_event_timer_adapter *rte_event_timer_adapter_lookup(
+ uint16_t adapter_id);
+
+/*
+ * Free an event timer adapter.
+ *
+ * Destroy an event timer adapter, freeing all resources.
+ *
+ * Before invoking this function, the application must wait for all the
+ * armed timers to expire or cancel the outstanding armed timers.
+ *
+ * @param adapter
+ * A pointer to an event timer adapter structure.
+ *
+ * @return
+ * - 0: Successfully freed the event timer adapter resources.
+ * - <0: Failed to free the event timer adapter resources.
+ * - -EAGAIN: adapter is busy; timers outstanding
+ * - -EBUSY: stop hasn't been called for this adapter yet
+ * - -EINVAL: adapter id invalid, or adapter invalid
+ */
+int rte_event_timer_adapter_free(struct rte_event_timer_adapter *adapter);
+
+/**
+ * Event timer state.
+ */
+enum rte_event_timer_state {
+ RTE_EVENT_TIMER_NOT_ARMED = 0,
+ /**< Event timer is in not armed state.*/
+ RTE_EVENT_TIMER_ARMED = 1,
+ /**< Event timer successfully armed.*/
+ RTE_EVENT_TIMER_ERROR = -1,
+ /**< Generic event timer error.*/
+ RTE_EVENT_TIMER_ERROR_TOOEARLY = -2,
+ /**< Event timer timeout tick is too little to add to the adapter. */
+ RTE_EVENT_TIMER_ERROR_TOOLATE = -3,
+ /**< Event timer timeout tick is greater than the maximum timeout.*/
+};
+
+/**
+ * The generic *rte_event_timer* structure to hold the event timer attributes
+ * for arm and cancel operations.
+ */
+RTE_STD_C11
+struct rte_event_timer {
+ struct rte_event ev;
+ /**<
+ * Expiry event attributes. On successful event timer timeout,
+ * the following attributes will be used to inject the expiry event to
+ * the eventdev:
+ * - event_queue_id: Targeted event queue id for expiry events.
+ * - event_priority: Event priority of the event expiry event in the
+ * event queue relative to other events.
+ * - sched_type: Scheduling type of the expiry event.
+ * - flow_id: Flow id of the expiry event.
+ * - op: RTE_EVENT_OP_NEW
+ * - event_type: RTE_EVENT_TYPE_TIMER
+ */
+ enum rte_event_timer_state state;
+ /**< State of the event timer. */
+ uint64_t timeout_ticks;
+ /**< Expiry timer ticks expressed in number of *timer_ticks_ns* from
+ * now.
+ * @see struct rte_event_timer_adapter_info::adapter_conf::timer_tick_ns
+ */
+ uint64_t impl_opaque[2];
+ /**< Implementation-specific opaque data.
+ * An event timer adapter implementation use this field to hold
+ * implementation specific values to share between the arm and cancel
+ * operations. The application should not modify this field.
+ */
+ uint8_t user_meta[];
+ /**< Memory to store user specific metadata.
+ * The event timer adapter implementation should not modify this area.
+ */
+} __rte_cache_aligned;
+
+/**
+ * Arm a burst of event timers with separate expiration timeout tick for each
+ * event timer.
+ *
+ * Before calling this function, the application allocates
+ * ``struct rte_event_timer`` objects from mempool or huge page backed
+ * application buffers of desired size. On successful allocation,
+ * application updates the `struct rte_event_timer`` attributes such as
+ * expiry event attributes, timeout ticks from now.
+ * This function submits the event timer arm requests to the event timer adapter
+ * and on expiry, the events will be injected to designated event queue.
+ *
+ * @param adapter
+ * A pointer to an event timer adapter structure.
+ * @param event_timers
+ * Pointer to an array of objects of type *rte_event_timer* structure.
+ * @param nb_event_timers
+ * Number of event timers in the supplied array.
+ *
+ * @return
+ * The number of successfully armed event timers. The return value can be less
+ * than the value of the *nb_timers* parameter. If the return value is less
+ * than *nb_events*, the remaining event timers at the end of *tim*
+ * are not consumed, and the caller has to take care of them, and rte_errno
+ * is set accordingly. Possible errno values include:
+ * - -EINVAL Invalid timer adapter identifier, expiry event queue ID is
+ * invalid, or an expiry event's sched type doesn't match the capabilities of
+ * the destination event queue.
+ * - -EAGAIN Specified timer adapter is not running
+ */
+int rte_event_timer_arm_burst(const struct rte_event_timer_adapter *adapter,
+ struct rte_event_timer **event_timers,
+ uint16_t nb_event_timers);
+
+/**
+ * Arm a burst of event timers with same expiration timeout tick.
+ *
+ * Provides the same functionality as ``rte_event_timer_arm_burst()``, except
+ * that application can use this API when all the event timers have the
+ * same timeout expiration tick. This specialized function can provide the
+ * additional hint to the adapter implementation and optimize if possible.
+ *
+ * @param adapter
+ * A pointer to an event timer adapter structure.
+ * @param event_timers
+ * Points to an array of objects of type *rte_event_timer* structure.
+ * @param timeout_ticks
+ * The number of ticks in which the timers should expire.
+ * @param nb_event_timers
+ * Number of event timers in the supplied array.
+ *
+ * @return
+ * The number of successfully armed event timers. The return value can be less
+ * than the value of the *nb_timers* parameter. If the return value is less
+ * than *nb_events*, the remaining event timers at the end of *tim*
+ * are not consumed, and the caller has to take care of them, and rte_errno
+ * is set accordingly. Possible errno values include:
+ * - -EINVAL Invalid timer adapter identifier, expiry event queue ID is
+ * invalid, or an expiry event's sched type doesn't match the capabilities of
+ * the destination event queue.
+ * - -EAGAIN Specified event timer adapter is not running
+ */
+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);
+
+/**
+ * Cancel a burst of event timer from being scheduled to the event device.
+ *
+ * @param adapter
+ * A pointer to an event timer adapter structure.
+ * @param event_timers
+ * Points to an array of objects of type *rte_event_timer* structure
+ * @param nb_event_timers
+ * Number of event timer instances in the supplied array.
+ *
+ * @return
+ * The number of successfully canceled event timers. The return value can be
+ * less than the value of the *nb_timers* parameter. If the return value is
+ * less than *nb_events*, the remaining event timers at the end of *tim*
+ * are not consumed, and the caller has to take care of them, and rte_errno
+ * is set accordingly. Possible errno values include:
+ * - -EINVAL Invalid timer adapter identifier
+ * - -EAGAIN Specified timer adapter is not running
+ */
+int rte_event_timer_cancel_burst(const struct rte_event_timer_adapter *adapter,
+ struct rte_event_timer **event_timers,
+ uint16_t nb_event_timers);
+
+#endif /* __RTE_EVENT_TIMER_ADAPTER_H__ */
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index f1949ff..a650f7a 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -875,8 +875,8 @@ rte_event_dev_close(uint8_t dev_id);
/**< The event generated from ethdev subsystem */
#define RTE_EVENT_TYPE_CRYPTODEV 0x1
/**< The event generated from crypodev subsystem */
-#define RTE_EVENT_TYPE_TIMERDEV 0x2
-/**< The event generated from timerdev subsystem */
+#define RTE_EVENT_TYPE_TIMER 0x2
+/**< The event generated from event timer adapter */
#define RTE_EVENT_TYPE_CPU 0x3
/**< The event generated from cpu for pipelining.
* Application may use *sub_event_type* to further classify the event
--
2.6.4
next prev parent reply other threads:[~2017-11-28 17:40 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-17 16:11 [dpdk-dev] [RFC PATCH 0/1] eventtimer: introduce event timer wheel Jerin Jacob
2017-08-17 16:11 ` [dpdk-dev] [RFC PATCH 1/1] " Jerin Jacob
2017-08-23 22:57 ` [dpdk-dev] [RFC PATCH 0/1] " Carrillo, Erik G
2017-08-25 10:25 ` Jerin Jacob
2017-08-29 15:02 ` Thomas Monjalon
2017-08-29 15:41 ` Jerin Jacob
2017-08-29 15:48 ` Thomas Monjalon
2017-08-29 16:07 ` Jerin Jacob
2017-09-22 15:17 ` [dpdk-dev] [RFC PATCH v2 0/1] eventtimer: introduce event timer adapter Erik Gabriel Carrillo
2017-09-22 15:17 ` [dpdk-dev] [RFC PATCH v2 1/1] " Erik Gabriel Carrillo
2017-10-03 14:37 ` [dpdk-dev] [RFC PATCH v2 0/1] " Jerin Jacob
2017-10-09 20:30 ` Carrillo, Erik G
2017-10-16 12:04 ` Pavan Nikhilesh Bhagavatula
2017-10-16 12:37 ` Pavan Nikhilesh Bhagavatula
2017-10-18 21:48 ` Carrillo, Erik G
2017-10-26 15:45 ` Pavan Nikhilesh Bhagavatula
2017-11-20 22:35 ` [dpdk-dev] [RFC PATCH v3 " Erik Gabriel Carrillo
2017-11-20 22:35 ` [dpdk-dev] [RFC PATCH v3 1/1] " Erik Gabriel Carrillo
2017-11-23 4:37 ` Pavan Nikhilesh Bhagavatula
2017-11-27 14:47 ` Carrillo, Erik G
2017-11-28 17:40 ` [dpdk-dev] [RFC PATCH v4 0/4] " Erik Gabriel Carrillo
2017-11-28 17:40 ` Erik Gabriel Carrillo [this message]
2017-11-29 10:29 ` [dpdk-dev] [RFC PATCH v4 1/4] " Pavan Nikhilesh Bhagavatula
2017-11-28 17:40 ` [dpdk-dev] [RFC PATCH v4 2/4] eventtimer: add common code Erik Gabriel Carrillo
2017-11-29 5:19 ` Pavan Nikhilesh Bhagavatula
2017-11-30 20:59 ` Carrillo, Erik G
2017-12-01 5:13 ` Pavan Nikhilesh Bhagavatula
2017-12-01 20:19 ` Carrillo, Erik G
2017-11-28 17:40 ` [dpdk-dev] [RFC PATCH v4 3/4] eventtimer: add default software implementation stub Erik Gabriel Carrillo
2017-11-29 10:34 ` Pavan Nikhilesh Bhagavatula
2017-11-30 23:56 ` Carrillo, Erik G
2017-12-01 5:15 ` Pavan Nikhilesh Bhagavatula
2017-11-28 17:40 ` [dpdk-dev] [RFC PATCH v4 4/4] test: add event timer adapter auto-test Erik Gabriel Carrillo
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