diff options
Diffstat (limited to 'drivers/event/sw/iq_ring.h')
| -rw-r--r-- | drivers/event/sw/iq_ring.h | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/drivers/event/sw/iq_ring.h b/drivers/event/sw/iq_ring.h deleted file mode 100644 index 64cf6784..00000000 --- a/drivers/event/sw/iq_ring.h +++ /dev/null @@ -1,172 +0,0 @@ -/*- - * 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 |