drivers/net/virtio/virtio_rxtx_simple.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #ifndef _VIRTIO_RXTX_SIMPLE_H_
   6 #define _VIRTIO_RXTX_SIMPLE_H_
   7
   8 #include <stdint.h>
   9
  10 #include "virtio_logs.h"
  11 #include "virtio_ethdev.h"
  12 #include "virtqueue.h"
  13 #include "virtio_rxtx.h"
  14
  15 #define RTE_VIRTIO_VPMD_RX_BURST 32
  16 #define RTE_VIRTIO_VPMD_RX_REARM_THRESH RTE_VIRTIO_VPMD_RX_BURST
  17
  18 static inline void
  19 virtio_rxq_rearm_vec(struct virtnet_rx *rxvq)
  20 {
  21         int i;
  22         uint16_t desc_idx;
  23         struct rte_mbuf **sw_ring;
  24         struct vring_desc *start_dp;
  25         int ret;
  26         struct virtqueue *vq = rxvq->vq;
  27
  28         desc_idx = vq->vq_avail_idx & (vq->vq_nentries - 1);
  29         sw_ring = &vq->sw_ring[desc_idx];
  30         start_dp = &vq->vq_ring.desc[desc_idx];
  31
  32         ret = rte_mempool_get_bulk(rxvq->mpool, (void **)sw_ring,
  33                 RTE_VIRTIO_VPMD_RX_REARM_THRESH);
  34         if (unlikely(ret)) {
  35                 rte_eth_devices[rxvq->port_id].data->rx_mbuf_alloc_failed +=
  36                         RTE_VIRTIO_VPMD_RX_REARM_THRESH;
  37                 return;
  38         }
  39
  40         for (i = 0; i < RTE_VIRTIO_VPMD_RX_REARM_THRESH; i++) {
  41                 uintptr_t p;
  42
  43                 p = (uintptr_t)&sw_ring[i]->rearm_data;
  44                 *(uint64_t *)p = rxvq->mbuf_initializer;
  45
  46                 start_dp[i].addr =
  47                         VIRTIO_MBUF_ADDR(sw_ring[i], vq) +
  48                         RTE_PKTMBUF_HEADROOM - vq->hw->vtnet_hdr_size;
  49                 start_dp[i].len = sw_ring[i]->buf_len -
  50                         RTE_PKTMBUF_HEADROOM + vq->hw->vtnet_hdr_size;
  51         }
  52
  53         vq->vq_avail_idx += RTE_VIRTIO_VPMD_RX_REARM_THRESH;
  54         vq->vq_free_cnt -= RTE_VIRTIO_VPMD_RX_REARM_THRESH;
  55         vq_update_avail_idx(vq);
  56 }
  57
  58 #endif /* _VIRTIO_RXTX_SIMPLE_H_ */