2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #define DPDK_NB_RX_DESC_DEFAULT 512
17 #define DPDK_NB_TX_DESC_DEFAULT 512
18 #define DPDK_NB_RX_DESC_VIRTIO 256
19 #define DPDK_NB_TX_DESC_VIRTIO 256
20 #define DPDK_NB_RX_DESC_10GE 2048
21 #define DPDK_NB_TX_DESC_10GE 2048
22 #define DPDK_NB_RX_DESC_40GE (4096-128)
23 #define DPDK_NB_TX_DESC_40GE 2048
25 /* These args appear by themselves */
26 #define foreach_eal_double_hyphen_predicate_arg \
34 #define foreach_eal_single_hyphen_mandatory_arg \
38 #define foreach_eal_single_hyphen_arg \
40 _(mem-alloc-request, m) \
43 /* These args are preceeded by "--" and followed by a single string */
44 #define foreach_eal_double_hyphen_arg \
51 dpdk_rx_burst ( dpdk_main_t * dm, dpdk_device_t * xd, u16 queue_id)
57 n_left = VLIB_FRAME_SIZE;
60 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
64 n_this_chunk = rte_eth_rx_burst (xd->device_index, queue_id,
65 xd->rx_vectors[queue_id] + n_buffers, n_left);
66 n_buffers += n_this_chunk;
67 n_left -= n_this_chunk;
69 /* Empirically, DPDK r1.8 produces vectors w/ 32 or fewer elts */
70 if (n_this_chunk < 32)
74 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
76 vlib_main_t * vm = vlib_get_main();
77 vlib_buffer_main_t * bm = vm->buffer_main;
78 unsigned socket_id = rte_socket_id();
81 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
82 offset = queue_id * VIRTIO_QNUM;
84 struct vhost_virtqueue *vq =
85 xd->vu_vhost_dev.virtqueue[offset + VIRTIO_TXQ];
87 if (PREDICT_FALSE(!vq->enabled))
90 if (PREDICT_FALSE(!xd->vu_is_running))
94 n_buffers = rte_vhost_dequeue_burst(&xd->vu_vhost_dev, offset + VIRTIO_TXQ,
95 bm->pktmbuf_pools[socket_id],
96 xd->rx_vectors[queue_id], VLIB_FRAME_SIZE);
99 struct rte_mbuf **pkts = xd->rx_vectors[queue_id];
100 for (i = 0; i < n_buffers; i++) {
101 struct rte_mbuf *buff = pkts[i];
102 bytes += rte_pktmbuf_data_len(buff);
105 f64 now = vlib_time_now (vm);
107 dpdk_vu_vring *vring = NULL;
108 /* send pending interrupts if needed */
109 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_TXQ)) {
110 vring = &(xd->vu_intf->vrings[offset + VIRTIO_TXQ]);
111 vring->n_since_last_int += n_buffers;
113 if ((vring->n_since_last_int && (vring->int_deadline < now))
114 || (vring->n_since_last_int > dm->vhost_coalesce_frames))
115 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_TXQ);
118 vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
119 vring->packets += n_buffers;
120 vring->bytes += bytes;
122 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
123 if (vring->n_since_last_int && (vring->int_deadline < now))
124 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
128 #ifdef RTE_LIBRTE_KNI
129 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
131 n_buffers = rte_kni_rx_burst(xd->kni, xd->rx_vectors[queue_id], VLIB_FRAME_SIZE);
132 rte_kni_handle_request(xd->kni);
145 dpdk_get_xstats (dpdk_device_t * xd)
148 if ((len = rte_eth_xstats_get(xd->device_index, NULL, 0)) > 0)
150 vec_validate(xd->xstats, len - 1);
151 vec_validate(xd->last_cleared_xstats, len - 1);
153 len = rte_eth_xstats_get(xd->device_index, xd->xstats, vec_len(xd->xstats));
155 ASSERT(vec_len(xd->xstats) == len);
156 ASSERT(vec_len(xd->last_cleared_xstats) == len);
158 _vec_len(xd->xstats) = len;
159 _vec_len(xd->last_cleared_xstats) = len;
166 dpdk_update_counters (dpdk_device_t * xd, f64 now)
168 vlib_simple_counter_main_t * cm;
169 vnet_main_t * vnm = vnet_get_main();
170 u32 my_cpu = os_get_cpu_number();
171 u64 rxerrors, last_rxerrors;
173 /* only update counters for PMD interfaces */
174 if (xd->dev_type != VNET_DPDK_DEV_ETH)
178 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
179 * therefore fake the stop in the dpdk driver by
180 * silently dropping all of the incoming pkts instead of
181 * stopping the driver / hardware.
183 if (xd->admin_up != 0xff)
185 xd->time_last_stats_update = now ? now : xd->time_last_stats_update;
186 clib_memcpy (&xd->last_stats, &xd->stats, sizeof (xd->last_stats));
187 rte_eth_stats_get (xd->device_index, &xd->stats);
189 /* maybe bump interface rx no buffer counter */
190 if (PREDICT_FALSE (xd->stats.rx_nombuf != xd->last_stats.rx_nombuf))
192 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
193 VNET_INTERFACE_COUNTER_RX_NO_BUF);
195 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
196 xd->stats.rx_nombuf -
197 xd->last_stats.rx_nombuf);
200 /* missed pkt counter */
201 if (PREDICT_FALSE (xd->stats.imissed != xd->last_stats.imissed))
203 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
204 VNET_INTERFACE_COUNTER_RX_MISS);
206 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
208 xd->last_stats.imissed);
210 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
211 rxerrors = xd->stats.ierrors;
212 last_rxerrors = xd->last_stats.ierrors;
214 rxerrors = xd->stats.ibadcrc
215 + xd->stats.ibadlen + xd->stats.ierrors;
216 last_rxerrors = xd->last_stats.ibadcrc
217 + xd->last_stats.ibadlen + xd->last_stats.ierrors;
220 if (PREDICT_FALSE (rxerrors != last_rxerrors))
222 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
223 VNET_INTERFACE_COUNTER_RX_ERROR);
225 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
226 rxerrors - last_rxerrors);