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/*
* Copyright (c) 2018 Ant Financial Services Group.
* 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.
*/
#include <sys/eventfd.h>
#include <unistd.h>
#include <rte_ethdev.h>
#include <rte_eth_ring.h>
#include "log.h"
#include "ctx.h"
#include "config.h"
#include "internal.h"
int stopped;
static struct rte_mempool *mpool[RTE_MAX_NUMA_NODES];
struct rte_mempool *
get_mempool_by_socket(int32_t socket_id)
{
struct rte_mempool *mp;
char name[RTE_MEMPOOL_NAMESIZE];
if (socket_id == SOCKET_ID_ANY)
socket_id = 0;
if (mpool[socket_id])
return mpool[socket_id];
snprintf(name, sizeof(name), "MP%u", socket_id);
mp = rte_pktmbuf_dynamic_pool_create(name, MAX_MBUFS - 1,
MBUF_PERCORE_CACHE, 0,
RTE_MBUF_DEFAULT_BUF_SIZE,
socket_id, MBUF_DYNAMIC_SIZE);
if (mp == NULL)
rte_panic("Failed to create mbuf mempool");
mpool[socket_id] = mp;
return mp;
}
static void
update_rss_conf(uint16_t port_id)
{
struct rte_eth_rss_conf rss_conf = {
.rss_key = NULL,
.rss_key_len = 0,
.rss_hf = ETH_RSS_IP | ETH_RSS_TCP | ETH_RSS_UDP,
};
if (rte_eth_dev_rss_hash_update(port_id, &rss_conf) < 0)
rte_panic("Failed to update rss hash");
}
static void
queue_init(uint16_t port_id, uint16_t nb_queues,
struct rte_eth_dev_info *dev_info,
struct rte_eth_conf *port_conf)
{
uint16_t q;
int32_t socket_id, rc;
uint16_t nb_rxd = 1024, nb_txd = 1024;
struct rte_mempool *mp;
struct rte_eth_txconf txq_conf = dev_info->default_txconf;
struct rte_eth_rxconf rxq_conf = dev_info->default_rxconf;
socket_id = rte_eth_dev_socket_id(port_id);
mp = get_mempool_by_socket(socket_id);
dev_info->default_rxconf.rx_drop_en = 1;
rc = rte_eth_dev_adjust_nb_rx_tx_desc(port_id, &nb_rxd, &nb_txd);
if (rc < 0)
rte_panic("Cannot adjust number of desc");
rxq_conf.offloads = port_conf->rxmode.offloads;
txq_conf.offloads = port_conf->txmode.offloads;
/* faster free of tx entries */
txq_conf.tx_free_thresh = nb_txd - 64;
for (q = 0; q < nb_queues; q++) {
rc = rte_eth_rx_queue_setup(port_id, q, nb_rxd,
socket_id, &rxq_conf, mp);
if (rc < 0)
rte_panic("rx queue=%u setup failed: %d", q, rc);
rc = setup_rx_cb(port_id, q);
if (rc < 0)
rte_panic("rx queue=%u rx setup failed: %d", q, rc);
}
for (q = 0; q < nb_queues; q++) {
rc = rte_eth_tx_queue_setup(port_id, q, nb_txd,
socket_id, &txq_conf);
if (rc < 0)
rte_panic("tx queue=%u setup failed: %d", q, rc);
}
}
uint64_t rx_offload =
DEV_RX_OFFLOAD_IPV4_CKSUM |
DEV_RX_OFFLOAD_UDP_CKSUM |
DEV_RX_OFFLOAD_TCP_CKSUM;
/* nice to have:
DEV_RX_OFFLOAD_CRC_STRIP |
DEV_RX_OFFLOAD_TCP_LRO |
DEV_RX_OFFLOAD_HEADER_SPLIT |
DEV_RX_OFFLOAD_SCATTER |
DEV_RX_OFFLOAD_TIMESTAMP
*/
uint64_t tx_offload =
DEV_TX_OFFLOAD_UDP_CKSUM |
DEV_TX_OFFLOAD_TCP_CKSUM |
DEV_TX_OFFLOAD_TCP_TSO |
DEV_TX_OFFLOAD_MULTI_SEGS;
int
dev_rxq_wakeup(uint16_t port_id)
{
int fd;
uint16_t qid;
uint32_t vec, efd_idx;
struct rte_eth_dev *dev;
struct rte_intr_handle *intr_handle;
RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
dev = &rte_eth_devices[port_id];
intr_handle = dev->intr_handle;
if (!intr_handle)
return -ENOTSUP;
if (!intr_handle->intr_vec)
return -EPERM;
for (qid = 0; qid < dev->data->nb_rx_queues; qid++) {
vec = intr_handle->intr_vec[qid];
efd_idx = (vec >= RTE_INTR_VEC_RXTX_OFFSET) ?
(vec - RTE_INTR_VEC_RXTX_OFFSET) : vec;
fd = intr_handle->efds[efd_idx];
if (eventfd_write(fd, (eventfd_t) 1) < 0)
return -errno;
}
return 0;
}
void
port_reconfig(void)
{
int32_t rc;
struct rte_eth_dev_info dev_info;
uint16_t port_id = 0; /* We use and only use port 0 */
uint16_t nb_port;
uint16_t nb_queues = nb_ctx;
struct rte_eth_conf port_conf = {
.intr_conf = {
.rxq = 1,
},
};
/* 0. dev number check */
nb_port = rte_eth_dev_count_avail();
if (nb_port < 1 || nb_port >2)
rte_panic("One port is mandatory with an optional loopback device\n");
stopped = 1;
rte_wmb();
/* wake up all rxqs */
if (nb_ctx > 1)
dev_rxq_wakeup(port_id);
usleep(1); /* fix me: this cannot gurantee correctness */
rte_eth_dev_stop(port_id);
/* 1. offloading check and set*/
rte_eth_dev_info_get(port_id, &dev_info);
rx_offload &= dev_info.rx_offload_capa;
port_conf.rxmode.offloads = rx_offload;
tx_offload &= dev_info.tx_offload_capa;
port_conf.txmode.offloads = tx_offload;
GLUE_LOG(INFO, "configure queues = %d, offloads: rx = %"PRIx64", tx = %"PRIx64,
nb_queues, rx_offload, tx_offload);
/* 2. dev configure */
rc = rte_eth_dev_configure(port_id, nb_queues, nb_queues, &port_conf);
if (rc != 0)
rte_panic("Failed to configure device, %d", rc);
/* 3. queue setup */
queue_init(port_id, nb_queues, &dev_info, &port_conf);
/* 4. rss conf */
if (nb_queues > 1)
update_rss_conf(port_id);
/* 5. dev start */
if (rte_eth_dev_start(port_id) < 0)
rte_panic("Failed to start device");
stopped = 0;
}
uint16_t
create_loopback(uint32_t socket_id)
{
int ret;
struct rte_ring* lb_queue;
static uint16_t lb_port_id = 0xFFFF;
const char *ring_name = "loopback-ring";
if (lb_port_id != 0xFFFF)
return lb_port_id;
lb_queue = rte_ring_create(ring_name, MAX_PKTS_BURST * 8, socket_id,
RING_F_SP_ENQ | RING_F_SC_DEQ);
if (!lb_queue)
rte_panic("Failed to create ring for loopback\n");
ret = rte_eth_from_ring(lb_queue);
if (ret < 0)
rte_panic("Failed to create ethdev from ring\n");
lb_port_id = ret;
if (setup_rx_cb(lb_port_id, 0) < 0)
rte_panic("Failed to set up rx cb for loopback\n");
return lb_port_id;
}
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