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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
* 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.
*/
#ifndef _VIRTIO_RXTX_SIMPLE_H_
#define _VIRTIO_RXTX_SIMPLE_H_
#include <stdint.h>
#include "virtio_logs.h"
#include "virtio_ethdev.h"
#include "virtqueue.h"
#include "virtio_rxtx.h"
#define RTE_VIRTIO_VPMD_RX_BURST 32
#define RTE_VIRTIO_VPMD_RX_REARM_THRESH RTE_VIRTIO_VPMD_RX_BURST
static inline void
virtio_rxq_rearm_vec(struct virtnet_rx *rxvq)
{
int i;
uint16_t desc_idx;
struct rte_mbuf **sw_ring;
struct vring_desc *start_dp;
int ret;
struct virtqueue *vq = rxvq->vq;
desc_idx = vq->vq_avail_idx & (vq->vq_nentries - 1);
sw_ring = &vq->sw_ring[desc_idx];
start_dp = &vq->vq_ring.desc[desc_idx];
ret = rte_mempool_get_bulk(rxvq->mpool, (void **)sw_ring,
RTE_VIRTIO_VPMD_RX_REARM_THRESH);
if (unlikely(ret)) {
rte_eth_devices[rxvq->port_id].data->rx_mbuf_alloc_failed +=
RTE_VIRTIO_VPMD_RX_REARM_THRESH;
return;
}
for (i = 0; i < RTE_VIRTIO_VPMD_RX_REARM_THRESH; i++) {
uintptr_t p;
p = (uintptr_t)&sw_ring[i]->rearm_data;
*(uint64_t *)p = rxvq->mbuf_initializer;
start_dp[i].addr =
VIRTIO_MBUF_ADDR(sw_ring[i], vq) +
RTE_PKTMBUF_HEADROOM - vq->hw->vtnet_hdr_size;
start_dp[i].len = sw_ring[i]->buf_len -
RTE_PKTMBUF_HEADROOM + vq->hw->vtnet_hdr_size;
}
vq->vq_avail_idx += RTE_VIRTIO_VPMD_RX_REARM_THRESH;
vq->vq_free_cnt -= RTE_VIRTIO_VPMD_RX_REARM_THRESH;
vq_update_avail_idx(vq);
}
#define VIRTIO_TX_FREE_THRESH 32
#define VIRTIO_TX_MAX_FREE_BUF_SZ 32
#define VIRTIO_TX_FREE_NR 32
/* TODO: vq->tx_free_cnt could mean num of free slots so we could avoid shift */
static inline void
virtio_xmit_cleanup(struct virtqueue *vq)
{
uint16_t i, desc_idx;
uint32_t nb_free = 0;
struct rte_mbuf *m, *free[VIRTIO_TX_MAX_FREE_BUF_SZ];
desc_idx = (uint16_t)(vq->vq_used_cons_idx &
((vq->vq_nentries >> 1) - 1));
m = (struct rte_mbuf *)vq->vq_descx[desc_idx++].cookie;
m = rte_pktmbuf_prefree_seg(m);
if (likely(m != NULL)) {
free[0] = m;
nb_free = 1;
for (i = 1; i < VIRTIO_TX_FREE_NR; i++) {
m = (struct rte_mbuf *)vq->vq_descx[desc_idx++].cookie;
m = rte_pktmbuf_prefree_seg(m);
if (likely(m != NULL)) {
if (likely(m->pool == free[0]->pool))
free[nb_free++] = m;
else {
rte_mempool_put_bulk(free[0]->pool,
(void **)free,
RTE_MIN(RTE_DIM(free),
nb_free));
free[0] = m;
nb_free = 1;
}
}
}
rte_mempool_put_bulk(free[0]->pool, (void **)free,
RTE_MIN(RTE_DIM(free), nb_free));
} else {
for (i = 1; i < VIRTIO_TX_FREE_NR; i++) {
m = (struct rte_mbuf *)vq->vq_descx[desc_idx++].cookie;
m = rte_pktmbuf_prefree_seg(m);
if (m != NULL)
rte_mempool_put(m->pool, m);
}
}
vq->vq_used_cons_idx += VIRTIO_TX_FREE_NR;
vq->vq_free_cnt += (VIRTIO_TX_FREE_NR << 1);
}
#endif /* _VIRTIO_RXTX_SIMPLE_H_ */
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