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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 _STREAM_H_
#define _STREAM_H_
#include "ctx.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Common structure that must be present as first field in all partcular
* L4 (UDP/TCP, etc.) stream implementations.
*/
struct tle_stream {
STAILQ_ENTRY(tle_stream) link;
struct tle_ctx *ctx;
uint8_t type; /* TLE_V4 or TLE_V6 */
/* Stream address information. */
union l4_ports port;
union l4_ports pmsk;
union {
struct {
union ipv4_addrs addr;
union ipv4_addrs mask;
} ipv4;
struct {
union ipv6_addrs addr;
union ipv6_addrs mask;
} ipv6;
};
};
static inline uint32_t
get_streams(struct tle_ctx *ctx, struct tle_stream *s[], uint32_t num)
{
struct tle_stream *p;
uint32_t i, n;
rte_spinlock_lock(&ctx->streams.lock);
n = RTE_MIN(ctx->streams.nb_free, num);
for (i = 0, p = STAILQ_FIRST(&ctx->streams.free);
i != n;
i++, p = STAILQ_NEXT(p, link))
s[i] = p;
if (p == NULL)
/* we retrieved all free entries */
STAILQ_INIT(&ctx->streams.free);
else
STAILQ_FIRST(&ctx->streams.free) = p;
ctx->streams.nb_free -= n;
rte_spinlock_unlock(&ctx->streams.lock);
return n;
}
static inline struct tle_stream *
get_stream(struct tle_ctx *ctx)
{
struct tle_stream *s;
s = NULL;
if (ctx->streams.nb_free == 0)
return s;
get_streams(ctx, &s, 1);
return s;
}
static inline void
put_stream(struct tle_ctx *ctx, struct tle_stream *s, int32_t head)
{
s->type = TLE_VNUM;
rte_spinlock_lock(&ctx->streams.lock);
if (head != 0)
STAILQ_INSERT_HEAD(&ctx->streams.free, s, link);
else
STAILQ_INSERT_TAIL(&ctx->streams.free, s, link);
ctx->streams.nb_free++;
rte_spinlock_unlock(&ctx->streams.lock);
}
/* calculate number of drbs per stream. */
static inline uint32_t
calc_stream_drb_num(const struct tle_ctx *ctx, uint32_t obj_num)
{
uint32_t num;
num = (ctx->prm.max_stream_sbufs + obj_num - 1) / obj_num;
num = num + num / 2;
num = RTE_MAX(num, RTE_DIM(ctx->dev) + 1);
return num;
}
static inline uint32_t
drb_nb_elem(const struct tle_ctx *ctx)
{
return (ctx->prm.send_bulk_size != 0) ?
ctx->prm.send_bulk_size : MAX_PKT_BURST;
}
static inline int32_t
stream_get_dest(struct tle_stream *s, const void *dst_addr,
struct tle_dest *dst)
{
int32_t rc;
const struct in_addr *d4;
const struct in6_addr *d6;
struct tle_ctx *ctx;
struct tle_dev *dev;
ctx = s->ctx;
/* it is here just to keep gcc happy. */
d4 = NULL;
if (s->type == TLE_V4) {
d4 = dst_addr;
rc = ctx->prm.lookup4(ctx->prm.lookup4_data, d4, dst);
} else if (s->type == TLE_V6) {
d6 = dst_addr;
rc = ctx->prm.lookup6(ctx->prm.lookup6_data, d6, dst);
} else
rc = -ENOENT;
if (rc < 0 || dst->dev == NULL || dst->dev->ctx != ctx)
return -ENOENT;
dev = dst->dev;
if (s->type == TLE_V4) {
struct ipv4_hdr *l3h;
l3h = (struct ipv4_hdr *)(dst->hdr + dst->l2_len);
l3h->src_addr = dev->prm.local_addr4.s_addr;
l3h->dst_addr = d4->s_addr;
} else {
struct ipv6_hdr *l3h;
l3h = (struct ipv6_hdr *)(dst->hdr + dst->l2_len);
rte_memcpy(l3h->src_addr, &dev->prm.local_addr6,
sizeof(l3h->src_addr));
rte_memcpy(l3h->dst_addr, d6, sizeof(l3h->dst_addr));
}
return dev - ctx->dev;
}
#ifdef __cplusplus
}
#endif
#endif /* _STREAM_H_ */
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