vdpa/mlx5: support queue update
[dpdk.git] / 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_split.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_ */