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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* 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.
*/
#define DPDK_NB_RX_DESC_DEFAULT 512
#define DPDK_NB_TX_DESC_DEFAULT 512
#define DPDK_NB_RX_DESC_VIRTIO 256
#define DPDK_NB_TX_DESC_VIRTIO 256
#define DPDK_NB_RX_DESC_10GE 2048
#define DPDK_NB_TX_DESC_10GE 2048
#define DPDK_NB_RX_DESC_40GE (4096-128)
#define DPDK_NB_TX_DESC_40GE 2048
/* These args appear by themselves */
#define foreach_eal_double_hyphen_predicate_arg \
_(no-shconf) \
_(no-hpet) \
_(no-pci) \
_(no-huge) \
_(vmware-tsc-map) \
_(virtio-vhost)
#define foreach_eal_single_hyphen_mandatory_arg \
_(coremask, c) \
_(nchannels, n) \
#define foreach_eal_single_hyphen_arg \
_(blacklist, b) \
_(mem-alloc-request, m) \
_(force-ranks, r)
/* These args are preceeded by "--" and followed by a single string */
#define foreach_eal_double_hyphen_arg \
_(huge-dir) \
_(proc-type) \
_(file-prefix) \
_(vdev)
static inline u32
dpdk_rx_burst ( dpdk_main_t * dm, dpdk_device_t * xd, u16 queue_id)
{
u32 n_buffers;
u32 n_left;
u32 n_this_chunk;
n_left = VLIB_FRAME_SIZE;
n_buffers = 0;
if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
{
while (n_left)
{
n_this_chunk = rte_eth_rx_burst (xd->device_index, queue_id,
xd->rx_vectors[queue_id] + n_buffers, n_left);
n_buffers += n_this_chunk;
n_left -= n_this_chunk;
/* Empirically, DPDK r1.8 produces vectors w/ 32 or fewer elts */
if (n_this_chunk < 32)
break;
}
}
else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
{
vlib_main_t * vm = vlib_get_main();
vlib_buffer_main_t * bm = vm->buffer_main;
unsigned socket_id = rte_socket_id();
u32 offset = 0;
#if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
offset = queue_id * VIRTIO_QNUM;
struct vhost_virtqueue *vq =
xd->vu_vhost_dev.virtqueue[offset + VIRTIO_TXQ];
if (PREDICT_FALSE(!vq->enabled))
return 0;
#else
if (PREDICT_FALSE(!xd->vu_is_running))
return 0;
#endif
n_buffers = rte_vhost_dequeue_burst(&xd->vu_vhost_dev, offset + VIRTIO_TXQ,
bm->pktmbuf_pools[socket_id],
xd->rx_vectors[queue_id], VLIB_FRAME_SIZE);
int i; u32 bytes = 0;
struct rte_mbuf **pkts = xd->rx_vectors[queue_id];
for (i = 0; i < n_buffers; i++) {
struct rte_mbuf *buff = pkts[i];
bytes += rte_pktmbuf_data_len(buff);
}
f64 now = vlib_time_now (vm);
dpdk_vu_vring *vring = NULL;
/* send pending interrupts if needed */
if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_TXQ)) {
vring = &(xd->vu_intf->vrings[offset + VIRTIO_TXQ]);
vring->n_since_last_int += n_buffers;
if ((vring->n_since_last_int && (vring->int_deadline < now))
|| (vring->n_since_last_int > dm->vhost_coalesce_frames))
dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_TXQ);
}
vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
vring->packets += n_buffers;
vring->bytes += bytes;
if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
if (vring->n_since_last_int && (vring->int_deadline < now))
dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
}
}
#ifdef RTE_LIBRTE_KNI
else if (xd->dev_type == VNET_DPDK_DEV_KNI)
{
n_buffers = rte_kni_rx_burst(xd->kni, xd->rx_vectors[queue_id], VLIB_FRAME_SIZE);
rte_kni_handle_request(xd->kni);
}
#endif
else
{
ASSERT(0);
}
return n_buffers;
}
static inline void
dpdk_get_xstats (dpdk_device_t * xd)
{
int len;
if ((len = rte_eth_xstats_get(xd->device_index, NULL, 0)) > 0)
{
vec_validate(xd->xstats, len - 1);
vec_validate(xd->last_cleared_xstats, len - 1);
len = rte_eth_xstats_get(xd->device_index, xd->xstats, vec_len(xd->xstats));
ASSERT(vec_len(xd->xstats) == len);
ASSERT(vec_len(xd->last_cleared_xstats) == len);
_vec_len(xd->xstats) = len;
_vec_len(xd->last_cleared_xstats) = len;
}
}
static inline void
dpdk_update_counters (dpdk_device_t * xd, f64 now)
{
vlib_simple_counter_main_t * cm;
vnet_main_t * vnm = vnet_get_main();
u32 my_cpu = os_get_cpu_number();
u64 rxerrors, last_rxerrors;
/* only update counters for PMD interfaces */
if (xd->dev_type != VNET_DPDK_DEV_ETH)
return;
/*
* DAW-FIXME: VMXNET3 device stop/start doesn't work,
* therefore fake the stop in the dpdk driver by
* silently dropping all of the incoming pkts instead of
* stopping the driver / hardware.
*/
if (xd->admin_up != 0xff)
{
xd->time_last_stats_update = now ? now : xd->time_last_stats_update;
clib_memcpy (&xd->last_stats, &xd->stats, sizeof (xd->last_stats));
rte_eth_stats_get (xd->device_index, &xd->stats);
/* maybe bump interface rx no buffer counter */
if (PREDICT_FALSE (xd->stats.rx_nombuf != xd->last_stats.rx_nombuf))
{
cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
VNET_INTERFACE_COUNTER_RX_NO_BUF);
vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
xd->stats.rx_nombuf -
xd->last_stats.rx_nombuf);
}
/* missed pkt counter */
if (PREDICT_FALSE (xd->stats.imissed != xd->last_stats.imissed))
{
cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
VNET_INTERFACE_COUNTER_RX_MISS);
vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
xd->stats.imissed -
xd->last_stats.imissed);
}
#if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
rxerrors = xd->stats.ierrors;
last_rxerrors = xd->last_stats.ierrors;
#else
rxerrors = xd->stats.ibadcrc
+ xd->stats.ibadlen + xd->stats.ierrors;
last_rxerrors = xd->last_stats.ibadcrc
+ xd->last_stats.ibadlen + xd->last_stats.ierrors;
#endif
if (PREDICT_FALSE (rxerrors != last_rxerrors))
{
cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
VNET_INTERFACE_COUNTER_RX_ERROR);
vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
rxerrors - last_rxerrors);
}
}
dpdk_get_xstats(xd);
}
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