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eventdev: add errno-style return values

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This commit adds rte_errno return values to rte_event_enqueue_burst() and
rte_event_dequeue_burst().

These return values allows user software to differentiate between an
invalid argument (such as an invalid queue_id or sched_type in an enqueued
event) and backpressure from the event device.

The port and device ID checks are placed in RTE_LIBRTE_EVENTDEV_DEBUG
header guards to avoid the performance hit in non-debug execution.

Signed-off-by: Gage Eads <gage.eads@intel.com>
This commit is contained in:
Gage Eads 2017-04-03 18:05:51 +05:30 committed by Jerin Jacob
parent 3ed7fc039a
commit 406aed4e0d
1 changed files with 34 additions and 3 deletions
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37
lib/librte_eventdev/rte_eventdev.h
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@ -245,6 +245,7 @@ extern "C" {
#include <rte_common.h>
#include <rte_memory.h>
#include <rte_errno.h>
struct rte_mbuf; /* we just use mbuf pointers; no need to include rte_mbuf.h */
@ -1119,9 +1120,15 @@ rte_event_schedule(uint8_t dev_id)
* The number of event objects actually enqueued on the event device. The
* return value can be less than the value of the *nb_events* parameter when
* the event devices queue is full or if invalid parameters are specified in a
* *rte_event*. If return value is less than *nb_events*, the remaining events
* at the end of ev[] are not consumed,and the caller has to take care of them
*
* *rte_event*. If the return value is less than *nb_events*, the remaining
* events at the end of ev[] are not consumed and the caller has to take care
* of them, and rte_errno is set accordingly. Possible errno values include:
* - -EINVAL The port ID is invalid, device ID is invalid, an event's queue
* ID is invalid, or an event's sched type doesn't match the
* capabilities of the destination queue.
* - -ENOSPC The event port was backpressured and unable to enqueue
* one or more events. This error code is only applicable to
* closed systems.
* @see rte_event_port_enqueue_depth()
*/
static inline uint16_t
@ -1130,6 +1137,18 @@ rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id,
{
struct rte_eventdev *dev = &rte_eventdevs[dev_id];
#ifdef RTE_LIBRTE_EVENTDEV_DEBUG
if (dev_id >= RTE_EVENT_MAX_DEVS || !rte_eventdevs[dev_id].attached) {
rte_errno = -EINVAL;
return 0;
}
if (port_id >= dev->data->nb_ports) {
rte_errno = -EINVAL;
return 0;
}
#endif
/*
* Allow zero cost non burst mode routine invocation if application
* requests nb_events as const one
@ -1240,6 +1259,18 @@ rte_event_dequeue_burst(uint8_t dev_id, uint8_t port_id, struct rte_event ev[],
{
struct rte_eventdev *dev = &rte_eventdevs[dev_id];
#ifdef RTE_LIBRTE_EVENTDEV_DEBUG
if (dev_id >= RTE_EVENT_MAX_DEVS || !rte_eventdevs[dev_id].attached) {
rte_errno = -EINVAL;
return 0;
}
if (port_id >= dev->data->nb_ports) {
rte_errno = -EINVAL;
return 0;
}
#endif
/*
* Allow zero cost non burst mode routine invocation if application
* requests nb_events as const one