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/*
* Copyright (c) 2016 Intel Corporation.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _TCP_TXQ_H_
#define _TCP_TXQ_H_
#ifdef __cplusplus
extern "C" {
#endif
static inline struct rte_mbuf **
tcp_txq_get_nxt_objs(const struct tle_tcp_stream *s, uint32_t *num)
{
uint32_t cnt, head, mask, sz, tail;
struct rte_ring *r;
r = s->tx.q;
sz = _rte_ring_get_size(r);
mask = _rte_ring_get_mask(r);
head = r->cons.head & mask;
tail = r->prod.tail & mask;
cnt = (tail >= head) ? tail - head : sz - head;
*num = cnt;
return (struct rte_mbuf **)(_rte_ring_get_data(r) + head);
}
static inline struct rte_mbuf **
tcp_txq_get_una_objs(const struct tle_tcp_stream *s, uint32_t *num)
{
uint32_t cnt, head, mask, sz, tail;
struct rte_ring *r;
r = s->tx.q;
sz = _rte_ring_get_size(r);
mask = _rte_ring_get_mask(r);
head = r->prod.tail & mask;
tail = r->cons.tail & mask;
cnt = (head >= tail) ? head - tail : sz - tail;
*num = cnt;
return (struct rte_mbuf **)(_rte_ring_get_data(r) + tail);
}
static inline void
tcp_txq_set_nxt_head(struct tle_tcp_stream *s, uint32_t num)
{
struct rte_ring *r;
r = s->tx.q;
r->cons.head += num;
}
static inline void
tcp_txq_rst_nxt_head(struct tle_tcp_stream *s)
{
struct rte_ring *r;
r = s->tx.q;
r->cons.head = r->cons.tail;
}
static inline void
tcp_txq_set_una_tail(struct tle_tcp_stream *s, uint32_t num)
{
struct rte_ring *r;
r = s->tx.q;
rte_smp_rmb();
r->cons.tail += num;
}
static inline uint32_t
tcp_txq_nxt_cnt(struct tle_tcp_stream *s)
{
struct rte_ring *r;
r = s->tx.q;
return (r->prod.tail - r->cons.head) & _rte_ring_get_mask(r);
}
static inline void
txs_enqueue(struct tle_ctx *ctx, struct tle_tcp_stream *s)
{
struct rte_ring *r;
uint32_t n;
if (rte_atomic32_add_return(&s->tx.arm, 1) == 1) {
r = CTX_TCP_TSQ(ctx);
n = _rte_ring_enqueue_burst(r, (void * const *)&s, 1);
RTE_VERIFY(n == 1);
}
}
static inline uint32_t
txs_dequeue_bulk(struct tle_ctx *ctx, struct tle_tcp_stream *s[], uint32_t num)
{
struct rte_ring *r;
r = CTX_TCP_TSQ(ctx);
return _rte_ring_dequeue_burst(r, (void **)s, num);
}
#ifdef __cplusplus
}
#endif
#endif /* _TCP_TXQ_H_ */
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