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vr_dpdk_ethdev.c
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vr_dpdk_ethdev.c
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/*
* Copyright (C) 2014 Semihalf.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* vr_dpdk_ethdev.c -- DPDK ethernet device
*
*/
#include "vr_dpdk.h"
#include <vr_mpls.h>
#include <rte_eth_bond.h>
#include <rte_errno.h>
#include <rte_ethdev.h>
#include <rte_hash_crc.h>
#include <rte_ip.h>
#include <rte_port_ethdev.h>
#include <rte_udp.h>
static struct rte_eth_conf ethdev_conf = {
.link_speed = 0, /* ETH_LINK_SPEED_10[0|00|000], or 0 for autonegotation */
.link_duplex = 0, /* ETH_LINK_[HALF_DUPLEX|FULL_DUPLEX], or 0 for autonegotation */
.rxmode = { /* Port RX configuration. */
/* The multi-queue packet distribution mode to be used, e.g. RSS. */
.mq_mode = ETH_MQ_RX_RSS,
.max_rx_pkt_len = ETHER_MAX_LEN, /* Only used if jumbo_frame enabled */
.header_split = 0, /* Disable Header Split */
.hw_ip_checksum = 1, /* Enable IP/UDP/TCP checksum offload */
.hw_vlan_filter = 0, /* Disabel VLAN filter */
.hw_vlan_strip = 0, /* Disable VLAN strip (might be enabled with --vlan argument) */
.hw_vlan_extend = 0, /* Disable Extended VLAN */
.jumbo_frame = 0, /* Disable Jumbo Frame Receipt */
.hw_strip_crc = 1, /* Enable CRC stripping by hardware */
.enable_scatter = 0, /* Disable scatter packets rx handler */
},
.rx_adv_conf = {
.rss_conf = { /* Port RSS configuration */
.rss_key = NULL, /* If not NULL, 40-byte hash key */
.rss_key_len = 0, /* Hash key length in bytes */
/* Hash functions to apply */
.rss_hf = ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP,
},
},
.txmode = { /* Port TX configuration. */
.mq_mode = ETH_MQ_TX_NONE, /* TX multi-queues mode */
/* For i40e specifically */
.pvid = 0,
.hw_vlan_reject_tagged = 0, /* If set, reject sending out tagged pkts */
.hw_vlan_reject_untagged = 0, /* If set, reject sending out untagged pkts */
.hw_vlan_insert_pvid = 0, /* If set, enable port based VLAN insertion */
},
.fdir_conf = {
#if VR_DPDK_USE_HW_FILTERING
.mode = RTE_FDIR_MODE_PERFECT, /* Flow Director mode. */
.status = RTE_FDIR_REPORT_STATUS, /* How to report FDIR hash. */
#else
.mode = RTE_FDIR_MODE_NONE,
.status = RTE_FDIR_NO_REPORT_STATUS,
#endif
.pballoc = RTE_FDIR_PBALLOC_64K, /* Space for FDIR filters. */
/* Offset of flexbytes field in RX packets (in 16-bit word units). */
/* TODO: flow director API has changed since DPDK 1.7 */
// .flexbytes_offset = VR_DPDK_MPLS_OFFSET,
/* RX queue of packets matching a "drop" filter in perfect mode. */
.drop_queue = 0,
.flex_conf = {
},
},
};
/* RX and TX Prefetch, Host, and Write-back threshold values should be
* carefully set for optimal performance. Consult the network
* controller's datasheet and supporting DPDK documentation for guidance
* on how these parameters should be set.
*/
/* RX ring configuration */
static const struct rte_eth_rxconf rx_queue_conf = {
.rx_thresh = {
.pthresh = 8, /* Ring prefetch threshold */
.hthresh = 8, /* Ring host threshold */
.wthresh = 4, /* Ring writeback threshold */
},
/* Do not immediately free RX descriptors */
.rx_free_thresh = VR_DPDK_RX_BURST_SZ,
};
/*
* These default values are optimized for use with the Intel(R) 82599 10 GbE
* Controller and the DPDK ixgbe PMD. Consider using other values for other
* network controllers and/or network drivers.
*/
/* TX ring configuration */
static const struct rte_eth_txconf tx_queue_conf = {
.tx_thresh = {
.pthresh = 36, /* Ring prefetch threshold */
.hthresh = 0, /* Ring host threshold */
.wthresh = 0, /* Ring writeback threshold */
},
.tx_free_thresh = 0, /* Use PMD default values */
.tx_rs_thresh = 0, /* Use PMD default values */
.txq_flags = 0 /* Set flags for the Tx queue */
};
/* Add hardware filter */
int
vr_dpdk_ethdev_filter_add(struct vr_interface *vif, uint16_t queue_id,
unsigned dst_ip, unsigned mpls_label)
{
struct vr_dpdk_ethdev *ethdev = (struct vr_dpdk_ethdev *)vif->vif_os;
uint8_t port_id = ethdev->ethdev_port_id;
struct rte_fdir_filter filter;
int ret;
/* accept 2-byte labels only */
if (mpls_label > 0xffff)
return -EINVAL;
if (queue_id > VR_DPDK_MAX_NB_RX_QUEUES)
return -EINVAL;
memset(&filter, 0, sizeof(filter));
filter.iptype = RTE_FDIR_IPTYPE_IPV4;
filter.l4type = RTE_FDIR_L4TYPE_UDP;
filter.ip_dst.ipv4_addr = dst_ip;
filter.port_dst = rte_cpu_to_be_16((uint16_t)VR_MPLS_OVER_UDP_DST_PORT);
filter.flex_bytes = rte_cpu_to_be_16((uint16_t)mpls_label);
RTE_LOG(DEBUG, VROUTER, "%s: ip_dst=0x%x port_dst=%d flex_bytes=%d\n", __func__,
(unsigned)dst_ip, (unsigned)VR_MPLS_OVER_UDP_DST_PORT, (unsigned)mpls_label);
if (queue_id >= 0xFF) {
RTE_LOG(ERR, VROUTER, " error adding perfect filter for eth device %"
PRIu8 ": queue ID %" PRIu16 " is out of range\n",
port_id, queue_id);
return -EINVAL;
}
ret = rte_eth_dev_fdir_add_perfect_filter(port_id, &filter, (uint16_t)mpls_label,
(uint8_t)queue_id, 0);
if (ret == 0)
ethdev->ethdev_queue_states[queue_id] = VR_DPDK_QUEUE_FILTERING_STATE;
return ret;
}
/* Get a ready queue ID */
uint16_t
vr_dpdk_ethdev_ready_queue_id_get(struct vr_interface *vif)
{
uint16_t i;
struct vr_dpdk_ethdev *ethdev = (struct vr_dpdk_ethdev *)vif->vif_os;
for (i = ethdev->ethdev_nb_rss_queues; i < ethdev->ethdev_nb_rx_queues; i++) {
if (ethdev->ethdev_queue_states[i] == VR_DPDK_QUEUE_READY_STATE) {
return i;
}
}
return VR_DPDK_INVALID_QUEUE_ID;
}
/* Release ethdev RX queue */
static void
dpdk_ethdev_rx_queue_release(unsigned lcore_id, struct vr_interface *vif)
{
struct vr_dpdk_lcore *lcore = vr_dpdk.lcores[lcore_id];
struct vr_dpdk_queue *rx_queue = &lcore->lcore_rx_queues[vif->vif_idx];
struct vr_dpdk_queue_params *rx_queue_params
= &lcore->lcore_rx_queue_params[vif->vif_idx];
/* free the queue */
if (rx_queue->rxq_ops.f_free(rx_queue->q_queue_h)) {
RTE_LOG(ERR, VROUTER, " error freeing lcore %u eth device RX queue\n",
lcore_id);
}
/* reset the queue */
vrouter_put_interface(rx_queue->q_vif);
memset(rx_queue, 0, sizeof(*rx_queue));
memset(rx_queue_params, 0, sizeof(*rx_queue_params));
}
/* Init eth RX queue */
struct vr_dpdk_queue *
vr_dpdk_ethdev_rx_queue_init(unsigned lcore_id, struct vr_interface *vif,
unsigned queue_or_lcore_id)
{
uint16_t rx_queue_id = queue_or_lcore_id;
uint8_t port_id;
unsigned int vif_idx = vif->vif_idx;
const unsigned int socket_id = rte_lcore_to_socket_id(lcore_id);
struct vr_dpdk_ethdev *ethdev;
struct vr_dpdk_lcore *lcore = vr_dpdk.lcores[lcore_id];
struct vr_dpdk_queue *rx_queue = &lcore->lcore_rx_queues[vif_idx];
struct vr_dpdk_queue_params *rx_queue_params
= &lcore->lcore_rx_queue_params[vif_idx];
ethdev = (struct vr_dpdk_ethdev *)vif->vif_os;
port_id = ethdev->ethdev_port_id;
/* init queue */
rx_queue->rxq_ops = rte_port_ethdev_reader_ops;
rx_queue->q_queue_h = NULL;
rx_queue->q_vif = vrouter_get_interface(vif->vif_rid, vif_idx);
/* create the queue */
struct rte_port_ethdev_reader_params reader_params = {
.port_id = port_id,
.queue_id = rx_queue_id,
};
rx_queue->q_queue_h = rx_queue->rxq_ops.f_create(&reader_params, socket_id);
if (rx_queue->q_queue_h == NULL) {
RTE_LOG(ERR, VROUTER, " error creating eth device %" PRIu8
" RX queue %" PRIu16 "\n", port_id, rx_queue_id);
return NULL;
}
/* store queue params */
rx_queue_params->qp_release_op = &dpdk_ethdev_rx_queue_release;
rx_queue_params->qp_ethdev.queue_id = rx_queue_id;
rx_queue_params->qp_ethdev.port_id = port_id;
return rx_queue;
}
/* Release ethdev TX queue */
static void
dpdk_ethdev_tx_queue_release(unsigned lcore_id, struct vr_interface *vif)
{
int i;
struct vr_dpdk_lcore *lcore = vr_dpdk.lcores[lcore_id];
struct vr_dpdk_queue *tx_queue = &lcore->lcore_tx_queues[vif->vif_idx];
struct vr_dpdk_queue_params *tx_queue_params
= &lcore->lcore_tx_queue_params[vif->vif_idx];
/* remove queue params from the list of bonds to TX */
for (i = 0; i < lcore->lcore_nb_bonds_to_tx; i++) {
if (likely(lcore->lcore_bonds_to_tx[i] == tx_queue_params)) {
lcore->lcore_bonds_to_tx[i] = NULL;
lcore->lcore_nb_bonds_to_tx--;
RTE_VERIFY(lcore->lcore_nb_bonds_to_tx <= VR_DPDK_MAX_BONDS);
/* copy the last element to the empty spot */
lcore->lcore_bonds_to_tx[i] = lcore->lcore_bonds_to_tx[lcore->lcore_nb_bonds_to_tx];
break;
}
}
tx_queue->txq_ops.f_tx = NULL;
rte_wmb();
/* flush and free the queue */
if (tx_queue->txq_ops.f_free(tx_queue->q_queue_h)) {
RTE_LOG(ERR, VROUTER, " error freeing lcore %u eth device TX queue\n",
lcore_id);
}
/* reset the queue */
vrouter_put_interface(tx_queue->q_vif);
memset(tx_queue, 0, sizeof(*tx_queue));
memset(tx_queue_params, 0, sizeof(*tx_queue_params));
}
/* Init eth TX queue */
struct vr_dpdk_queue *
vr_dpdk_ethdev_tx_queue_init(unsigned lcore_id, struct vr_interface *vif,
unsigned queue_or_lcore_id)
{
uint16_t tx_queue_id = queue_or_lcore_id;
uint8_t port_id;
unsigned int vif_idx = vif->vif_idx;
const unsigned int socket_id = rte_lcore_to_socket_id(lcore_id);
struct vr_dpdk_ethdev *ethdev;
struct vr_dpdk_lcore *lcore = vr_dpdk.lcores[lcore_id];
struct vr_dpdk_queue *tx_queue = &lcore->lcore_tx_queues[vif_idx];
struct vr_dpdk_queue_params *tx_queue_params
= &lcore->lcore_tx_queue_params[vif_idx];
ethdev = (struct vr_dpdk_ethdev *)vif->vif_os;
port_id = ethdev->ethdev_port_id;
/* init queue */
tx_queue->txq_ops = rte_port_ethdev_writer_ops;
tx_queue->q_queue_h = NULL;
tx_queue->q_vif = vrouter_get_interface(vif->vif_rid, vif_idx);
/* create the queue */
struct rte_port_ethdev_writer_params writer_params = {
.port_id = port_id,
.queue_id = tx_queue_id,
.tx_burst_sz = VR_DPDK_TX_BURST_SZ,
};
tx_queue->q_queue_h = tx_queue->txq_ops.f_create(&writer_params, socket_id);
if (tx_queue->q_queue_h == NULL) {
RTE_LOG(ERR, VROUTER, " error creating eth device %" PRIu8
" TX queue %" PRIu16 "\n", port_id, tx_queue_id);
return NULL;
}
/* store queue params */
tx_queue_params->qp_release_op = &dpdk_ethdev_tx_queue_release;
tx_queue_params->qp_ethdev.queue_id = tx_queue_id;
tx_queue_params->qp_ethdev.port_id = port_id;
/* for the queue 0 add queue params to the list of bonds to TX */
if (ethdev->ethdev_nb_slaves > 0 && tx_queue_id == 0) {
/* make sure queue params have been stored */
rte_wmb();
lcore->lcore_bonds_to_tx[lcore->lcore_nb_bonds_to_tx++] = tx_queue_params;
RTE_VERIFY(lcore->lcore_nb_bonds_to_tx <= VR_DPDK_MAX_BONDS);
}
return tx_queue;
}
/* Update device info */
static void
dpdk_ethdev_info_update(struct vr_dpdk_ethdev *ethdev)
{
struct rte_eth_dev_info dev_info;
rte_eth_dev_info_get(ethdev->ethdev_port_id, &dev_info);
ethdev->ethdev_nb_rx_queues = RTE_MIN(dev_info.max_rx_queues,
VR_DPDK_MAX_NB_RX_QUEUES);
/* [PAKCET_ID..FWD_ID) lcores have just TX queues, so we increase
* the number of TX queues here */
ethdev->ethdev_nb_tx_queues = RTE_MIN(RTE_MIN(dev_info.max_tx_queues,
vr_dpdk.nb_fwd_lcores + (VR_DPDK_FWD_LCORE_ID - VR_DPDK_PACKET_LCORE_ID)),
VR_DPDK_MAX_NB_TX_QUEUES);
/* Check if we have dedicated an lcore for SR-IOV VF IO. */
if (vr_dpdk.vf_lcore_id) {
ethdev->ethdev_nb_rx_queues = ethdev->ethdev_nb_tx_queues = 1;
}
ethdev->ethdev_nb_rss_queues = RTE_MIN(RTE_MIN(ethdev->ethdev_nb_rx_queues,
vr_dpdk.nb_fwd_lcores), VR_DPDK_MAX_NB_RSS_QUEUES);
ethdev->ethdev_reta_size = RTE_MIN(dev_info.reta_size,
VR_DPDK_MAX_RETA_SIZE);
RTE_LOG(DEBUG, VROUTER, "dev_info: driver_name=%s if_index=%u"
" max_rx_queues=%" PRIu16 " max_tx_queues=%" PRIu16
" max_vfs=%" PRIu16 " max_vmdq_pools=%" PRIu16
" rx_offload_capa=%" PRIx32 " tx_offload_capa=%" PRIx32 "\n",
dev_info.driver_name, dev_info.if_index,
dev_info.max_rx_queues, dev_info.max_tx_queues,
dev_info.max_vfs, dev_info.max_vmdq_pools,
dev_info.rx_offload_capa, dev_info.tx_offload_capa);
#if !VR_DPDK_USE_HW_FILTERING
/* use RSS queues only */
ethdev->ethdev_nb_rx_queues = ethdev->ethdev_nb_rss_queues;
#else
/* we use just RSS queues if the device does not support RETA */
if (ethdev->ethdev_reta_size == 0)
ethdev->ethdev_nb_rx_queues = ethdev->ethdev_nb_rss_queues;
#endif
return;
}
/* Setup ethdev hardware queues */
static int
dpdk_ethdev_queues_setup(struct vr_dpdk_ethdev *ethdev)
{
int ret, i;
uint8_t port_id = ethdev->ethdev_port_id;
struct rte_mempool *mempool;
/* configure RX queues */
RTE_LOG(DEBUG, VROUTER, "%s: nb_rx_queues=%u nb_tx_queues=%u\n",
__func__, (unsigned)ethdev->ethdev_nb_rx_queues,
(unsigned)ethdev->ethdev_nb_tx_queues);
for (i = 0; i < VR_DPDK_MAX_NB_RX_QUEUES; i++) {
if (i < ethdev->ethdev_nb_rss_queues) {
mempool = vr_dpdk.rss_mempool;
ethdev->ethdev_queue_states[i] = VR_DPDK_QUEUE_RSS_STATE;
} else if (i < ethdev->ethdev_nb_rx_queues) {
if (vr_dpdk.nb_free_mempools == 0) {
RTE_LOG(ERR, VROUTER, " error assigning mempool to eth device %"
PRIu8 " RX queue %d\n", port_id, i);
return -ENOMEM;
}
vr_dpdk.nb_free_mempools--;
mempool = vr_dpdk.free_mempools[vr_dpdk.nb_free_mempools];
ethdev->ethdev_queue_states[i] = VR_DPDK_QUEUE_READY_STATE;
} else {
ethdev->ethdev_queue_states[i] = VR_DPDK_QUEUE_NONE;
continue;
}
ret = rte_eth_rx_queue_setup(port_id, i, VR_DPDK_NB_RXD,
SOCKET_ID_ANY, &rx_queue_conf, mempool);
if (ret < 0) {
/* return mempool to the list */
if (mempool != vr_dpdk.rss_mempool)
vr_dpdk.nb_free_mempools++;
RTE_LOG(ERR, VROUTER, " error setting up eth device %" PRIu8 " RX queue %d"
": %s (%d)\n", port_id, i, rte_strerror(-ret), -ret);
return ret;
}
/* map RX queue to stats counter ignoring any errors */
rte_eth_dev_set_rx_queue_stats_mapping(port_id, i, i);
/* save queue mempool pointer */
ethdev->ethdev_mempools[i] = mempool;
}
i = ethdev->ethdev_nb_rx_queues - ethdev->ethdev_nb_rss_queues;
RTE_LOG(INFO, VROUTER, " setup %d RSS queue(s) and %d filtering queue(s)\n",
(int)ethdev->ethdev_nb_rss_queues, i);
/* configure TX queues */
for (i = 0; i < ethdev->ethdev_nb_tx_queues; i++) {
ret = rte_eth_tx_queue_setup(port_id, i, VR_DPDK_NB_TXD,
SOCKET_ID_ANY, &tx_queue_conf);
if (ret < 0) {
RTE_LOG(ERR, VROUTER, " error setting up eth device %" PRIu8 " TX queue %d"
": %s (%d)\n", port_id, i, rte_strerror(-ret), -ret);
return ret;
}
/* map TX queue to stats counter ignoring any errors */
rte_eth_dev_set_tx_queue_stats_mapping(port_id, i, i);
}
return 0;
}
static void
dpdk_ethdev_reta_show(uint8_t port_id, uint16_t reta_size)
{
int nb_entries = reta_size/RTE_RETA_GROUP_SIZE;
struct rte_eth_rss_reta_entry64 reta_entries[nb_entries];
struct rte_eth_rss_reta_entry64 *reta;
uint16_t i, idx, shift;
int ret, entry;
for (entry = 0; entry < nb_entries; entry++) {
reta = &reta_entries[entry];
/* reset RSS redirection table */
memset(reta, 0, sizeof(*reta));
reta->mask = 0xffffffffffffffffULL;
}
ret = rte_eth_dev_rss_reta_query(port_id, reta_entries, reta_size);
if (ret != 0) {
RTE_LOG(ERR, VROUTER, "Error getting RSS RETA info: %s (%d)\n",
rte_strerror(ret), ret);
return;
}
for (i = 0; i < reta_size; i++) {
idx = i / RTE_RETA_GROUP_SIZE;
shift = i % RTE_RETA_GROUP_SIZE;
if (!(reta_entries[idx].mask & (1ULL << shift)))
continue;
RTE_LOG(DEBUG, VROUTER, " hash index=%u, queue=%u\n",
i, reta_entries[idx].reta[shift]);
}
}
/* Init RSS */
int
vr_dpdk_ethdev_rss_init(struct vr_dpdk_ethdev *ethdev)
{
int ret, i, j, entry;
uint8_t port_id = ethdev->ethdev_port_id;
int nb_entries = ethdev->ethdev_reta_size/RTE_RETA_GROUP_SIZE;
struct rte_eth_rss_reta_entry64 reta_entries[VR_DPDK_MAX_RETA_ENTRIES];
struct rte_eth_rss_reta_entry64 *reta;
/* There is nothing to configure if the device does not support RETA.
* If the device reported few RX queues earlier, we assume those
* queues are preconfigured for RSS by default.
*/
if (ethdev->ethdev_reta_size == 0)
return 0;
RTE_LOG(DEBUG, VROUTER, "%s: RSS RETA BEFORE:\n", __func__);
dpdk_ethdev_reta_show(port_id, ethdev->ethdev_reta_size);
for (entry = 0; entry < nb_entries; entry++) {
reta = &reta_entries[entry];
/* create new RSS redirection table */
memset(reta, 0, sizeof(*reta));
reta->mask = 0xffffffffffffffffULL;
for (i = j = 0; i < RTE_RETA_GROUP_SIZE; i++) {
reta->reta[i] = j++;
if (ethdev->ethdev_queue_states[j] != VR_DPDK_QUEUE_RSS_STATE)
j = 0;
}
}
/* update RSS redirection table */
ret = rte_eth_dev_rss_reta_update(port_id, reta_entries,
ethdev->ethdev_reta_size);
/* no error if the device does not support RETA configuration */
if (ret == -ENOTSUP)
return 0;
if (ret < 0) {
RTE_LOG(ERR, VROUTER, " error initializing ethdev %" PRIu8 " RSS: %s (%d)\n",
port_id, rte_strerror(-ret), -ret);
}
RTE_LOG(DEBUG, VROUTER, "%s: RSS RETA AFTER:\n", __func__);
dpdk_ethdev_reta_show(port_id, ethdev->ethdev_reta_size);
return ret;
}
/* Init hardware filtering */
static void
dpdk_ethdev_mempools_free(struct vr_dpdk_ethdev *ethdev)
{
int i;
for (i = ethdev->ethdev_nb_rss_queues; i < ethdev->ethdev_nb_rx_queues; i++) {
if (ethdev->ethdev_mempools[i] != NULL
&& ethdev->ethdev_mempools[i] != vr_dpdk.rss_mempool) {
vr_dpdk.free_mempools[vr_dpdk.nb_free_mempools++] =
ethdev->ethdev_mempools[i];
ethdev->ethdev_mempools[i] = NULL;
ethdev->ethdev_queue_states[i] = VR_DPDK_QUEUE_READY_STATE;
}
}
}
/* Init hardware filtering */
int
vr_dpdk_ethdev_filtering_init(struct vr_interface *vif,
struct vr_dpdk_ethdev *ethdev)
{
int ret;
uint8_t port_id = ethdev->ethdev_port_id;
struct rte_fdir_masks masks;
struct rte_eth_fdir fdir_info;
/* probe Flow Director */
memset(&fdir_info, 0, sizeof(fdir_info));
ret = rte_eth_dev_fdir_get_infos(port_id, &fdir_info);
if (ret == 0) {
/* enable hardware filtering */
RTE_LOG(INFO, VROUTER, " enable hardware filtering for ethdev %"
PRIu8 "\n", port_id);
vif->vif_flags |= VIF_FLAG_FILTERING_OFFLOAD;
} else {
vif->vif_flags &= ~VIF_FLAG_FILTERING_OFFLOAD;
/* free filtering mempools */
dpdk_ethdev_mempools_free(ethdev);
/* the ethdev does not support hardware filtering - it's not an error */
return 0;
}
memset(&masks, 0, sizeof(masks));
masks.dst_ipv4_mask = 0xffffffff;
masks.dst_port_mask = 0xffff;
masks.flexbytes = 1;
ret = rte_eth_dev_fdir_set_masks(port_id, &masks);
if (ret < 0) {
RTE_LOG(ERR, VROUTER, " error setting ethdev %" PRIu8
" Flow Director masks: %s (%d)\n", port_id, rte_strerror(-ret), -ret);
}
return ret;
}
/* Update device bond info */
static void
dpdk_ethdev_bond_info_update(struct vr_dpdk_ethdev *ethdev)
{
int i, slave_port_id;
int port_id = ethdev->ethdev_port_id;
uint16_t mtu = 0;
struct rte_pci_addr *pci_addr;
struct ether_addr bond_mac, mac_addr;
struct ether_addr lacp_mac = { .addr_bytes = {0x01, 0x80, 0xc2, 0, 0, 0x02} };
if (rte_eth_bond_mode_get(port_id) == -1) {
ethdev->ethdev_nb_slaves = -1;
} else {
ethdev->ethdev_nb_slaves = rte_eth_bond_slaves_get(port_id,
ethdev->ethdev_slaves, sizeof(ethdev->ethdev_slaves));
memset(&mac_addr, 0, sizeof(bond_mac));
rte_eth_macaddr_get(port_id, &bond_mac);
RTE_LOG(INFO, VROUTER, " bond eth device %" PRIu8
" configured MAC " MAC_FORMAT "\n",
port_id, MAC_VALUE(bond_mac.addr_bytes));
/* log out and configure bond members */
for (i = 0; i < ethdev->ethdev_nb_slaves; i++) {
slave_port_id = ethdev->ethdev_slaves[i];
if (!rte_eth_devices[port_id].data->mtu) {
rte_eth_dev_get_mtu(slave_port_id, &mtu);
rte_eth_devices[port_id].data->mtu = mtu;
}
memset(&mac_addr, 0, sizeof(mac_addr));
rte_eth_macaddr_get(slave_port_id, &mac_addr);
pci_addr = &rte_eth_devices[slave_port_id].pci_dev->addr;
RTE_LOG(INFO, VROUTER, " bond member eth device %" PRIu8
" PCI " PCI_PRI_FMT " MAC " MAC_FORMAT "\n",
slave_port_id, pci_addr->domain, pci_addr->bus,
pci_addr->devid, pci_addr->function,
MAC_VALUE(mac_addr.addr_bytes));
/* try to add bond mac and LACP multicast MACs */
if (rte_eth_dev_mac_addr_add(slave_port_id, &bond_mac, 0) == 0
&& rte_eth_dev_mac_addr_add(slave_port_id, &lacp_mac, 0) == 0) {
/* disable the promisc mode enabled by default */
rte_eth_promiscuous_disable(ethdev->ethdev_port_id);
RTE_LOG(INFO, VROUTER, " bond member eth device %" PRIu8
" promisc mode disabled\n", slave_port_id);
} else {
RTE_LOG(INFO, VROUTER, " bond member eth device %" PRIu8
": unable to add MAC addresses\n", slave_port_id);
}
}
/* In LACP mode all the bond members are in the promisc mode
* by default (see bond_mode_8023ad_activate_slave()
* But we need also to put the bond interface in promisc to get
* the broadcasts. Seems to be a bug in bond_ethdev_rx_burst_8023ad()?
*/
rte_eth_promiscuous_enable(port_id);
}
}
/* Check if port_id is a bond slave. */
bool
vr_dpdk_ethdev_bond_port_match(uint8_t port_id, struct vr_dpdk_ethdev *ethdev)
{
int i;
if (ethdev->ethdev_nb_slaves > 0) {
for (i = 0; i < ethdev->ethdev_nb_slaves; i++) {
if (port_id == ethdev->ethdev_slaves[i])
break;
}
if (i < ethdev->ethdev_nb_slaves)
return true;
}
return false;
}
/* Init ethernet device */
int
vr_dpdk_ethdev_init(struct vr_dpdk_ethdev *ethdev)
{
uint8_t port_id;
int ret;
port_id = ethdev->ethdev_port_id;
ethdev->ethdev_ptr = &rte_eth_devices[port_id];
dpdk_ethdev_info_update(ethdev);
ret = rte_eth_dev_configure(port_id, ethdev->ethdev_nb_rx_queues,
ethdev->ethdev_nb_tx_queues, ðdev_conf);
if (ret < 0) {
RTE_LOG(ERR, VROUTER, " error configuring eth dev %" PRIu8
": %s (%d)\n",
port_id, rte_strerror(-ret), -ret);
return ret;
}
/* update device bond information after the device has been configured */
if (ethdev->ethdev_ptr->driver) /* af_packet has no driver and no bond info */
dpdk_ethdev_bond_info_update(ethdev);
ret = dpdk_ethdev_queues_setup(ethdev);
if (ret < 0)
return ret;
/* Promisc mode
* KNI generates random MACs for e1000e NICs, so we need this
* option enabled for the development on servers with those NICs
*/
#if VR_DPDK_ENABLE_PROMISC
rte_eth_promiscuous_enable(port_id);
#endif
return 0;
}
/* Release ethernet device */
int
vr_dpdk_ethdev_release(struct vr_dpdk_ethdev *ethdev)
{
ethdev->ethdev_ptr = NULL;
dpdk_ethdev_mempools_free(ethdev);
return 0;
}
/*
* dpdk_mbuf_rss_hash - emulate RSS hash for the mbuf.
*
* Returns:
* 0 if hash was not calculated
* 1 if hash was calculated.
*/
static inline int
dpdk_mbuf_rss_hash(struct rte_mbuf *mbuf, struct vr_ip *ipv4_hdr,
struct vr_ip6 *ipv6_hdr)
{
uint64_t *ip_addr_ptr;
uint32_t *l4_ptr = NULL;
uint32_t hash = 0;
unsigned char ip_proto, i;
if (likely(ipv4_hdr != NULL)) {
/**
* Both source and destination IPv4 addresses are 4-bytes long,
* so they can be hashed at once with single 8-byte hashing funcion.
*
* We use SSE4.2 CRC hash. No need to match NIC's Toeplitz hash ATM.
*/
ip_addr_ptr = (uint64_t *)((uintptr_t)ipv4_hdr +
offsetof(struct vr_ip, ip_saddr));
hash = rte_hash_crc_8byte(*ip_addr_ptr, hash);
if (likely(!vr_ip_fragment(ipv4_hdr))) {
ip_proto = ipv4_hdr->ip_proto;
l4_ptr = (uint32_t *)((uintptr_t)ipv4_hdr + (ipv4_hdr->ip_hl) * IPV4_IHL_MULTIPLIER);
} else {
ip_proto = 0;
}
} else if (ipv6_hdr != NULL) {
/**
* Both source and destination IPv6 addresses are 16-bytes long,
* and DPDK hashing functions can calculate 8-bytes at once, so hashing
* has to be done in four steps, each address hashed from the beginning
* to the middle, and from the middle to the end. In the header, first
* comes source address, which is followed by destination address. This
* lets us to set the pointer to the beginning of source address and
* move it by 64 bits after hash is calculated.
*/
for (i = 0; i < 4; i++) {
ip_addr_ptr = (uint64_t *)((uintptr_t)ipv6_hdr +
offsetof(struct ipv6_hdr, src_addr) + 8*i);
hash = rte_hash_crc_8byte(*ip_addr_ptr, hash);
}
ip_proto = ipv6_hdr->ip6_nxt;
/* In case of extended header L4 is not hashed. */
l4_ptr = (uint32_t *)((uintptr_t)ipv6_hdr + sizeof(struct ipv6_hdr));
} else {
return 0;
}
switch (ip_proto) {
case VR_IP_PROTO_TCP:
hash = rte_hash_crc_4byte(*l4_ptr, hash);
break;
case VR_IP_PROTO_UDP:
hash = rte_hash_crc_4byte(*l4_ptr, hash);
break;
}
mbuf->ol_flags |= PKT_RX_RSS_HASH;
mbuf->hash.rss = hash;
RTE_LOG(DEBUG, VROUTER, "%s: RSS hash: 0x%x (emulated)\n",
__func__, mbuf->hash.rss);
return 1;
}
/* dpdk_mbuf_parse_and_hash_packets
*
* Parse incoming packet. Check L2, L3 headers, encapsulation type, perform
* TCP MSS adjust if needed, then call hashing function to.
*
* Return:
* -1 if packet length is too short to contain valid header
* 0 if there is no need to perform hashing (ie. unsupported encap type,
* packet already hashed)
* dpdk_mbuf_rss_hash() if hashing is needed. dpdk_mbuf_rss_hash() returns 1
* if hash was calculated, 0 if not.
*
* TODO: if we ever need to set L4 lengths or packet type flags, or other info
* about received packets, this is a good place to do it.
*/
static int
dpdk_mbuf_parse_and_hash_packets(struct rte_mbuf *mbuf)
{
struct vr_eth *eth_hdr = rte_pktmbuf_mtod(mbuf, struct vr_eth *);
struct vr_ip *ipv4_hdr = NULL;
struct vr_ip *ipv4_inner_hdr = NULL;
struct vr_ip6 *ipv6_hdr = NULL;
struct vr_ip6 *ipv6_inner_hdr = NULL;
struct vr_udp *udp_hdr = NULL;
struct vr_gre *gre_hdr = NULL;
struct vlan_hdr *vlan_hdr;
unsigned int pull_len = VR_ETHER_HLEN, ipv4_len;
int encap_type, helper_ret;
unsigned short gre_udp_encap = 0, gre_hdr_len = VR_GRE_BASIC_HDR_LEN,
eth_proto, udp_port;
uint16_t mbuf_data_len = rte_pktmbuf_data_len(mbuf);
if (unlikely(mbuf_data_len < pull_len))
return -1;
eth_proto = eth_hdr->eth_proto;
/* Skip VLAN tag. It may be present if we handle tagged packet from VM. */
while (eth_proto == rte_cpu_to_be_16(VR_ETH_PROTO_VLAN)) {
if (unlikely(mbuf_data_len < pull_len + VR_VLAN_HLEN))
return -1;
/* Store the first VLAN TCI for further use. */
if (likely((mbuf->ol_flags & PKT_RX_VLAN_PKT) == 0)) {
vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
mbuf->ol_flags |= PKT_RX_VLAN_PKT;
mbuf->vlan_tci = rte_be_to_cpu_16(vlan_hdr->vlan_tci);
}
eth_proto = ((struct vr_vlan_hdr *)((uintptr_t)eth_hdr + pull_len))->vlan_proto;
pull_len += VR_VLAN_HLEN;
}
if (likely(eth_proto == rte_cpu_to_be_16(VR_ETH_PROTO_IP))) {
ipv4_hdr = (struct vr_ip *)((uintptr_t)eth_hdr + pull_len);
if (unlikely(mbuf_data_len < pull_len + sizeof(struct vr_ip)))
return -1;
ipv4_len = (ipv4_hdr->ip_hl) * IPV4_IHL_MULTIPLIER;
pull_len += ipv4_len;
if (ipv4_hdr->ip_proto == VR_IP_PROTO_GRE) {
gre_hdr = (struct vr_gre *)((uintptr_t)ipv4_hdr + ipv4_len);
if (unlikely(mbuf_data_len < pull_len + VR_GRE_BASIC_HDR_LEN))
return -1;
if (likely(gre_hdr->gre_proto == VR_GRE_PROTO_MPLS_NO)) {
/* We are not RFC 1701 compliant receiver. */
if (unlikely(gre_hdr->gre_flags & (~(VR_GRE_FLAG_CSUM |
VR_GRE_FLAG_KEY))))
return 0;
if (gre_hdr->gre_flags & VR_GRE_FLAG_CSUM) {
gre_hdr_len += (VR_GRE_CKSUM_HDR_LEN -
VR_GRE_BASIC_HDR_LEN);
}
if (gre_hdr->gre_flags & VR_GRE_FLAG_KEY) {
gre_hdr_len += (VR_GRE_KEY_HDR_LEN -
VR_GRE_BASIC_HDR_LEN);
}
pull_len += gre_hdr_len;
gre_udp_encap = gre_hdr->gre_proto;
/*
* mbuf->ol_flags & PKT_RX_RSS_HASH is mistakenly set
* by the NIC driver for MPLS over GRE packets. It is
* removed here and will be set after we perform hashing.
*/
mbuf->ol_flags &= ~PKT_RX_RSS_HASH;
/* Go to parsing. */
} else {
return 0; /* Looks like GRE, but no MPLS. */
}
} else if (ipv4_hdr->ip_proto == VR_IP_PROTO_UDP) {
/* At this point the packet may be:
* IP with inner packet carried in MPLS-over-UDP, or
* IP with inner packet carried in VXLAN, or
* just regular UDP inside IP.
*/
udp_hdr = (struct vr_udp *)((uintptr_t)ipv4_hdr + ipv4_len);
if (unlikely(mbuf_data_len < pull_len + sizeof(struct vr_udp)))
return -1;
/*
* If it is a packet from VM, it for sure will not be MPLS-over-UDP,
* so go directly to hashing procedure.
*/
/*
* TODO: we can't rely on RSS_HASH flag here, since there might be
* NICs which does not set the flag yet carry MPLSoUDP packets.
*
* Instead we have to check the vif type to make sure the packet is
* from a VM.
*/
if (unlikely((mbuf->ol_flags & PKT_RX_RSS_HASH) == 0))
return dpdk_mbuf_rss_hash(mbuf, ipv4_hdr, ipv6_hdr);
if (likely(!vr_ip_fragment(ipv4_hdr))) {
udp_port = rte_be_to_cpu_16(udp_hdr->udp_dport);
if (likely(vr_mpls_udp_port(udp_port) || vr_vxlan_udp_port(udp_port))) {
pull_len += sizeof(struct vr_udp);
gre_udp_encap = udp_hdr->udp_dport;
/* Go to parsing. */
} else {
/* UDP from the wire, but not MPLS-over-UDP nor VXLAN. */
return 0;
}
}
} else if ((mbuf->ol_flags & PKT_RX_RSS_HASH) == 0) {
/* Looks like no tunneling, perhaps a packet from a VM. */
return dpdk_mbuf_rss_hash(mbuf, ipv4_hdr, ipv6_hdr);
} else {
RTE_LOG(DEBUG, VROUTER, "%s: RSS hash: 0x%x (from NIC)\n",
__func__, mbuf->hash.rss);
return 0; /* Not MPLS-over-GRE, not MPLS-over-UDP, not anything from VM. */
}
helper_ret = vr_inner_pkt_parse(rte_pktmbuf_mtod(mbuf, unsigned char *),
vr_mpls_tunnel_type, &encap_type,
NULL, &pull_len, mbuf->buf_len,
&ipv4_inner_hdr, &ipv6_inner_hdr,
gre_udp_encap, ipv4_hdr->ip_proto);
if (helper_ret == PKT_RET_SLOW_PATH)
return -1;
else if (helper_ret == PKT_RET_UNHANDLED)
return 0;
/* If not inner IPv4 nor IPv6 - nothing to do. */
if (unlikely(ipv4_inner_hdr == NULL))
return 0; /* Inner IPv6 packets have ipv4_inner_hdr != NULL */
helper_ret = vr_ip_transport_parse(ipv4_inner_hdr, ipv6_inner_hdr,
NULL, mbuf->buf_len,
dpdk_adjust_tcp_mss, NULL, NULL,
NULL, &pull_len);
if (unlikely(helper_ret == PKT_RET_SLOW_PATH))
return -1;
/* Packet may already be hashed by the NIC */
if (mbuf->ol_flags & PKT_RX_RSS_HASH) {
RTE_LOG(DEBUG, VROUTER, "%s: RSS hash: 0x%x (from NIC)\n",
__func__, mbuf->hash.rss);
return 0;
} else {
/* For GRE packets we need to hash inner packet */
if (gre_hdr) {
if (ipv6_inner_hdr) {
ipv6_hdr = ipv6_inner_hdr;
ipv4_hdr = NULL;
} else if (ipv4_inner_hdr) {
ipv4_hdr = ipv4_inner_hdr;
}
}
/* Go to hashing */
}
} else if (eth_proto == rte_cpu_to_be_16(VR_ETH_PROTO_IP6)) {
ipv6_hdr = (struct vr_ip6 *)((uintptr_t)eth_hdr + pull_len);
if (unlikely(mbuf_data_len < pull_len + sizeof(struct vr_ip6)))
return -1;
/**
* There's no IPv6 as a tunnel between nodes, so it is either a packet
* from VM, or some non-related IPv6 packet from the wire.
*/
if ((mbuf->ol_flags & PKT_RX_RSS_HASH) == 0) {
return dpdk_mbuf_rss_hash(mbuf, ipv4_hdr, ipv6_hdr);
} else {
RTE_LOG(DEBUG, VROUTER, "%s: RSS hash: 0x%x (from NIC)\n",
__func__, mbuf->hash.rss);
return 0;
}
} else {
return 0;
}
return dpdk_mbuf_rss_hash(mbuf, ipv4_hdr, ipv6_hdr);
}
/*
* vr_dpdk_ethdev_rx_emulate - emulate smart NIC RX:
* - strip VLAN tags for packets received from fabric interface
* - calculate RSS hash if not present
* - recalculate RSS hash for MPLSoGRE packets
*
* Returns 0 on no hash changes, otherwise a bitmask of mbufs to distribute.
*/
uint64_t
vr_dpdk_ethdev_rx_emulate(struct vr_interface *vif,
struct rte_mbuf *pkts[VR_DPDK_RX_BURST_SZ], uint32_t *nb_pkts)
{
uint64_t mask_to_distribute = 0, mask_to_distribute_ret = 0,
mask_to_drop = 0;
unsigned i, nb_pkts_ret = 0;
int ret;