+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2016-2017 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.
- */
-
-/*
- * Ring structure definitions used for the internal ring buffers of the
- * SW eventdev implementation. These are designed for single-core use only.
- */
-#ifndef _IQ_RING_
-#define _IQ_RING_
-
-#include <stdint.h>
-
-#include <rte_common.h>
-#include <rte_memory.h>
-#include <rte_malloc.h>
-#include <rte_eventdev.h>
-
-#define IQ_RING_NAMESIZE 12
-#define QID_IQ_DEPTH 512
-#define QID_IQ_MASK (uint16_t)(QID_IQ_DEPTH - 1)
-
-struct iq_ring {
- char name[IQ_RING_NAMESIZE] __rte_cache_aligned;
- uint16_t write_idx;
- uint16_t read_idx;
-
- struct rte_event ring[QID_IQ_DEPTH];
-};
-
-static inline struct iq_ring *
-iq_ring_create(const char *name, unsigned int socket_id)
-{
- struct iq_ring *retval;
-
- retval = rte_malloc_socket(NULL, sizeof(*retval), 0, socket_id);
- if (retval == NULL)
- goto end;
-
- snprintf(retval->name, sizeof(retval->name), "%s", name);
- retval->write_idx = retval->read_idx = 0;
-end:
- return retval;
-}
-
-static inline void
-iq_ring_destroy(struct iq_ring *r)
-{
- rte_free(r);
-}
-
-static __rte_always_inline uint16_t
-iq_ring_count(const struct iq_ring *r)
-{
- return r->write_idx - r->read_idx;
-}
-
-static __rte_always_inline uint16_t
-iq_ring_free_count(const struct iq_ring *r)
-{
- return QID_IQ_MASK - iq_ring_count(r);
-}
-
-static __rte_always_inline uint16_t
-iq_ring_enqueue_burst(struct iq_ring *r, struct rte_event *qes, uint16_t nb_qes)
-{
- const uint16_t read = r->read_idx;
- uint16_t write = r->write_idx;
- const uint16_t space = read + QID_IQ_MASK - write;
- uint16_t i;
-
- if (space < nb_qes)
- nb_qes = space;
-
- for (i = 0; i < nb_qes; i++, write++)
- r->ring[write & QID_IQ_MASK] = qes[i];
-
- r->write_idx = write;
-
- return nb_qes;
-}
-
-static __rte_always_inline uint16_t
-iq_ring_dequeue_burst(struct iq_ring *r, struct rte_event *qes, uint16_t nb_qes)
-{
- uint16_t read = r->read_idx;
- const uint16_t write = r->write_idx;
- const uint16_t items = write - read;
- uint16_t i;
-
- for (i = 0; i < nb_qes; i++, read++)
- qes[i] = r->ring[read & QID_IQ_MASK];
-
- if (items < nb_qes)
- nb_qes = items;
-
- r->read_idx += nb_qes;
-
- return nb_qes;
-}
-
-/* assumes there is space, from a previous dequeue_burst */
-static __rte_always_inline uint16_t
-iq_ring_put_back(struct iq_ring *r, struct rte_event *qes, uint16_t nb_qes)
-{
- uint16_t i, read = r->read_idx;
-
- for (i = nb_qes; i-- > 0; )
- r->ring[--read & QID_IQ_MASK] = qes[i];
-
- r->read_idx = read;
- return nb_qes;
-}
-
-static __rte_always_inline const struct rte_event *
-iq_ring_peek(const struct iq_ring *r)
-{
- return &r->ring[r->read_idx & QID_IQ_MASK];
-}
-
-static __rte_always_inline void
-iq_ring_pop(struct iq_ring *r)
-{
- r->read_idx++;
-}
-
-static __rte_always_inline int
-iq_ring_enqueue(struct iq_ring *r, const struct rte_event *qe)
-{
- const uint16_t read = r->read_idx;
- const uint16_t write = r->write_idx;
- const uint16_t space = read + QID_IQ_MASK - write;
-
- if (space == 0)
- return -1;
-
- r->ring[write & QID_IQ_MASK] = *qe;
-
- r->write_idx = write + 1;
-
- return 0;
-}
-
-#endif
Code Review / deb_dpdk.git / blobdiff