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numam-dpdk/examples/vhost/main.c
Josh Soref 7be78d0279 fix spelling in comments and strings 
The tool comes from https://github.com/jsoref

Signed-off-by: Josh Soref <jsoref@gmail.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
2022-01-11 12:16:53 +01:00

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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2017 Intel Corporation
*/
#include <arpa/inet.h>
#include <getopt.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/virtio_net.h>
#include <linux/virtio_ring.h>
#include <signal.h>
#include <stdint.h>
#include <sys/eventfd.h>
#include <sys/param.h>
#include <unistd.h>
#include <rte_cycles.h>
#include <rte_ethdev.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_malloc.h>
#include <rte_net.h>
#include <rte_vhost.h>
#include <rte_ip.h>
#include <rte_tcp.h>
#include <rte_pause.h>
#include "ioat.h"
#include "main.h"
#ifndef MAX_QUEUES
#define MAX_QUEUES 128
#endif
/* the maximum number of external ports supported */
#define MAX_SUP_PORTS 1
#define MBUF_CACHE_SIZE 128
#define MBUF_DATA_SIZE RTE_MBUF_DEFAULT_BUF_SIZE
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
#define BURST_RX_WAIT_US 15 /* Defines how long we wait between retries on RX */
#define BURST_RX_RETRIES 4 /* Number of retries on RX. */
#define JUMBO_FRAME_MAX_SIZE 0x2600
#define MAX_MTU (JUMBO_FRAME_MAX_SIZE - (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN))
/* State of virtio device. */
#define DEVICE_MAC_LEARNING 0
#define DEVICE_RX 1
#define DEVICE_SAFE_REMOVE 2
/* Configurable number of RX/TX ring descriptors */
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 512
#define INVALID_PORT_ID 0xFF
/* mask of enabled ports */
static uint32_t enabled_port_mask = 0;
/* Promiscuous mode */
static uint32_t promiscuous;
/* number of devices/queues to support*/
static uint32_t num_queues = 0;
static uint32_t num_devices;
static struct rte_mempool *mbuf_pool;
static int mergeable;
/* Enable VM2VM communications. If this is disabled then the MAC address compare is skipped. */
typedef enum {
VM2VM_DISABLED = 0,
VM2VM_SOFTWARE = 1,
VM2VM_HARDWARE = 2,
VM2VM_LAST
} vm2vm_type;
static vm2vm_type vm2vm_mode = VM2VM_SOFTWARE;
/* Enable stats. */
static uint32_t enable_stats = 0;
/* Enable retries on RX. */
static uint32_t enable_retry = 1;
/* Disable TX checksum offload */
static uint32_t enable_tx_csum;
/* Disable TSO offload */
static uint32_t enable_tso;
static int client_mode;
static int builtin_net_driver;
static int async_vhost_driver;
static char *dma_type;
/* Specify timeout (in useconds) between retries on RX. */
static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
/* Specify the number of retries on RX. */
static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
/* Socket file paths. Can be set by user */
static char *socket_files;
static int nb_sockets;
/* empty VMDq configuration structure. Filled in programmatically */
static struct rte_eth_conf vmdq_conf_default = {
.rxmode = {
.mq_mode = RTE_ETH_MQ_RX_VMDQ_ONLY,
.split_hdr_size = 0,
/*
* VLAN strip is necessary for 1G NIC such as I350,
* this fixes bug of ipv4 forwarding in guest can't
* forward packets from one virtio dev to another virtio dev.
*/
.offloads = RTE_ETH_RX_OFFLOAD_VLAN_STRIP,
},
.txmode = {
.mq_mode = RTE_ETH_MQ_TX_NONE,
.offloads = (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |
RTE_ETH_TX_OFFLOAD_TCP_CKSUM |
RTE_ETH_TX_OFFLOAD_VLAN_INSERT |
RTE_ETH_TX_OFFLOAD_MULTI_SEGS |
RTE_ETH_TX_OFFLOAD_TCP_TSO),
},
.rx_adv_conf = {
/*
* should be overridden separately in code with
* appropriate values
*/
.vmdq_rx_conf = {
.nb_queue_pools = RTE_ETH_8_POOLS,
.enable_default_pool = 0,
.default_pool = 0,
.nb_pool_maps = 0,
.pool_map = {{0, 0},},
},
},
};
static unsigned lcore_ids[RTE_MAX_LCORE];
static uint16_t ports[RTE_MAX_ETHPORTS];
static unsigned num_ports = 0; /**< The number of ports specified in command line */
static uint16_t num_pf_queues, num_vmdq_queues;
static uint16_t vmdq_pool_base, vmdq_queue_base;
static uint16_t queues_per_pool;
const uint16_t vlan_tags[] = {
1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007,
1008, 1009, 1010, 1011, 1012, 1013, 1014, 1015,
1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023,
1024, 1025, 1026, 1027, 1028, 1029, 1030, 1031,
1032, 1033, 1034, 1035, 1036, 1037, 1038, 1039,
1040, 1041, 1042, 1043, 1044, 1045, 1046, 1047,
1048, 1049, 1050, 1051, 1052, 1053, 1054, 1055,
1056, 1057, 1058, 1059, 1060, 1061, 1062, 1063,
};
/* ethernet addresses of ports */
static struct rte_ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS];
static struct vhost_dev_tailq_list vhost_dev_list =
TAILQ_HEAD_INITIALIZER(vhost_dev_list);
static struct lcore_info lcore_info[RTE_MAX_LCORE];
/* Used for queueing bursts of TX packets. */
struct mbuf_table {
unsigned len;
unsigned txq_id;
struct rte_mbuf *m_table[MAX_PKT_BURST];
};
struct vhost_bufftable {
uint32_t len;
uint64_t pre_tsc;
struct rte_mbuf *m_table[MAX_PKT_BURST];
};
/* TX queue for each data core. */
struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
/*
* Vhost TX buffer for each data core.
* Every data core maintains a TX buffer for every vhost device,
* which is used for batch pkts enqueue for higher performance.
*/
struct vhost_bufftable *vhost_txbuff[RTE_MAX_LCORE * MAX_VHOST_DEVICE];
#define MBUF_TABLE_DRAIN_TSC ((rte_get_tsc_hz() + US_PER_S - 1) \
/ US_PER_S * BURST_TX_DRAIN_US)
static inline int
open_dma(const char *value)
{
if (dma_type != NULL && strncmp(dma_type, "ioat", 4) == 0)
return open_ioat(value);
return -1;
}
/*
* Builds up the correct configuration for VMDQ VLAN pool map
* according to the pool & queue limits.
*/
static inline int
get_eth_conf(struct rte_eth_conf *eth_conf, uint32_t num_devices)
{
struct rte_eth_vmdq_rx_conf conf;
struct rte_eth_vmdq_rx_conf *def_conf =
&vmdq_conf_default.rx_adv_conf.vmdq_rx_conf;
unsigned i;
memset(&conf, 0, sizeof(conf));
conf.nb_queue_pools = (enum rte_eth_nb_pools)num_devices;
conf.nb_pool_maps = num_devices;
conf.enable_loop_back = def_conf->enable_loop_back;
conf.rx_mode = def_conf->rx_mode;
for (i = 0; i < conf.nb_pool_maps; i++) {
conf.pool_map[i].vlan_id = vlan_tags[ i ];
conf.pool_map[i].pools = (1UL << i);
}
(void)(rte_memcpy(eth_conf, &vmdq_conf_default, sizeof(*eth_conf)));
(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &conf,
sizeof(eth_conf->rx_adv_conf.vmdq_rx_conf)));
return 0;
}
/*
* Initialises a given port using global settings and with the rx buffers
* coming from the mbuf_pool passed as parameter
*/
static inline int
port_init(uint16_t port)
{
struct rte_eth_dev_info dev_info;
struct rte_eth_conf port_conf;
struct rte_eth_rxconf *rxconf;
struct rte_eth_txconf *txconf;
int16_t rx_rings, tx_rings;
uint16_t rx_ring_size, tx_ring_size;
int retval;
uint16_t q;
/* The max pool number from dev_info will be used to validate the pool number specified in cmd line */
retval = rte_eth_dev_info_get(port, &dev_info);
if (retval != 0) {
RTE_LOG(ERR, VHOST_PORT,
"Error during getting device (port %u) info: %s\n",
port, strerror(-retval));
return retval;
}
rxconf = &dev_info.default_rxconf;
txconf = &dev_info.default_txconf;
rxconf->rx_drop_en = 1;
/*configure the number of supported virtio devices based on VMDQ limits */
num_devices = dev_info.max_vmdq_pools;
rx_ring_size = RTE_TEST_RX_DESC_DEFAULT;
tx_ring_size = RTE_TEST_TX_DESC_DEFAULT;
tx_rings = (uint16_t)rte_lcore_count();
if (mergeable) {
if (dev_info.max_mtu != UINT16_MAX && dev_info.max_rx_pktlen > dev_info.max_mtu)
vmdq_conf_default.rxmode.mtu = dev_info.max_mtu;
else
vmdq_conf_default.rxmode.mtu = MAX_MTU;
}
/* Get port configuration. */
retval = get_eth_conf(&port_conf, num_devices);
if (retval < 0)
return retval;
/* NIC queues are divided into pf queues and vmdq queues. */
num_pf_queues = dev_info.max_rx_queues - dev_info.vmdq_queue_num;
queues_per_pool = dev_info.vmdq_queue_num / dev_info.max_vmdq_pools;
num_vmdq_queues = num_devices * queues_per_pool;
num_queues = num_pf_queues + num_vmdq_queues;
vmdq_queue_base = dev_info.vmdq_queue_base;
vmdq_pool_base = dev_info.vmdq_pool_base;
printf("pf queue num: %u, configured vmdq pool num: %u, each vmdq pool has %u queues\n",
num_pf_queues, num_devices, queues_per_pool);
if (!rte_eth_dev_is_valid_port(port))
return -1;
rx_rings = (uint16_t)dev_info.max_rx_queues;
if (dev_info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
port_conf.txmode.offloads |=
RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
/* Configure ethernet device. */
retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
if (retval != 0) {
RTE_LOG(ERR, VHOST_PORT, "Failed to configure port %u: %s.\n",
port, strerror(-retval));
return retval;
}
retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &rx_ring_size,
&tx_ring_size);
if (retval != 0) {
RTE_LOG(ERR, VHOST_PORT, "Failed to adjust number of descriptors "
"for port %u: %s.\n", port, strerror(-retval));
return retval;
}
if (rx_ring_size > RTE_TEST_RX_DESC_DEFAULT) {
RTE_LOG(ERR, VHOST_PORT, "Mbuf pool has an insufficient size "
"for Rx queues on port %u.\n", port);
return -1;
}
/* Setup the queues. */
rxconf->offloads = port_conf.rxmode.offloads;
for (q = 0; q < rx_rings; q ++) {
retval = rte_eth_rx_queue_setup(port, q, rx_ring_size,
rte_eth_dev_socket_id(port),
rxconf,
mbuf_pool);
if (retval < 0) {
RTE_LOG(ERR, VHOST_PORT,
"Failed to setup rx queue %u of port %u: %s.\n",
q, port, strerror(-retval));
return retval;
}
}
txconf->offloads = port_conf.txmode.offloads;
for (q = 0; q < tx_rings; q ++) {
retval = rte_eth_tx_queue_setup(port, q, tx_ring_size,
rte_eth_dev_socket_id(port),
txconf);
if (retval < 0) {
RTE_LOG(ERR, VHOST_PORT,
"Failed to setup tx queue %u of port %u: %s.\n",
q, port, strerror(-retval));
return retval;
}
}
/* Start the device. */
retval = rte_eth_dev_start(port);
if (retval < 0) {
RTE_LOG(ERR, VHOST_PORT, "Failed to start port %u: %s\n",
port, strerror(-retval));
return retval;
}
if (promiscuous) {
retval = rte_eth_promiscuous_enable(port);
if (retval != 0) {
RTE_LOG(ERR, VHOST_PORT,
"Failed to enable promiscuous mode on port %u: %s\n",
port, rte_strerror(-retval));
return retval;
}
}
retval = rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
if (retval < 0) {
RTE_LOG(ERR, VHOST_PORT,
"Failed to get MAC address on port %u: %s\n",
port, rte_strerror(-retval));
return retval;
}
RTE_LOG(INFO, VHOST_PORT, "Max virtio devices supported: %u\n", num_devices);
RTE_LOG(INFO, VHOST_PORT, "Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
port, RTE_ETHER_ADDR_BYTES(&vmdq_ports_eth_addr[port]));
return 0;
}
/*
* Set socket file path.
*/
static int
us_vhost_parse_socket_path(const char *q_arg)
{
char *old;
/* parse number string */
if (strnlen(q_arg, PATH_MAX) == PATH_MAX)
return -1;
old = socket_files;
socket_files = realloc(socket_files, PATH_MAX * (nb_sockets + 1));
if (socket_files == NULL) {
free(old);
return -1;
}
strlcpy(socket_files + nb_sockets * PATH_MAX, q_arg, PATH_MAX);
nb_sockets++;
return 0;
}
/*
* Parse the portmask provided at run time.
*/
static int
parse_portmask(const char *portmask)
{
char *end = NULL;
unsigned long pm;
errno = 0;
/* parse hexadecimal string */
pm = strtoul(portmask, &end, 16);
if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0))
return 0;
return pm;
}
/*
* Parse num options at run time.
*/
static int
parse_num_opt(const char *q_arg, uint32_t max_valid_value)
{
char *end = NULL;
unsigned long num;
errno = 0;
/* parse unsigned int string */
num = strtoul(q_arg, &end, 10);
if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0))
return -1;
if (num > max_valid_value)
return -1;
return num;
}
/*
* Display usage
*/
static void
us_vhost_usage(const char *prgname)
{
RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
" --vm2vm [0|1|2]\n"
" --rx_retry [0|1] --mergeable [0|1] --stats [0-N]\n"
" --socket-file <path>\n"
" --nb-devices ND\n"
" -p PORTMASK: Set mask for ports to be used by application\n"
" --vm2vm [0|1|2]: disable/software(default)/hardware vm2vm comms\n"
" --rx-retry [0|1]: disable/enable(default) retries on Rx. Enable retry if destination queue is full\n"
" --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX. This makes effect only if retries on rx enabled\n"
" --rx-retry-num [0-N]: the number of retries on rx. This makes effect only if retries on rx enabled\n"
" --mergeable [0|1]: disable(default)/enable RX mergeable buffers\n"
" --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
" --socket-file: The path of the socket file.\n"
" --tx-csum [0|1] disable/enable TX checksum offload.\n"
" --tso [0|1] disable/enable TCP segment offload.\n"
" --client register a vhost-user socket as client mode.\n"
" --dma-type register dma type for your vhost async driver. For example \"ioat\" for now.\n"
" --dmas register dma channel for specific vhost device.\n",
prgname);
}
enum {
#define OPT_VM2VM "vm2vm"
OPT_VM2VM_NUM = 256,
#define OPT_RX_RETRY "rx-retry"
OPT_RX_RETRY_NUM,
#define OPT_RX_RETRY_DELAY "rx-retry-delay"
OPT_RX_RETRY_DELAY_NUM,
#define OPT_RX_RETRY_NUMB "rx-retry-num"
OPT_RX_RETRY_NUMB_NUM,
#define OPT_MERGEABLE "mergeable"
OPT_MERGEABLE_NUM,
#define OPT_STATS "stats"
OPT_STATS_NUM,
#define OPT_SOCKET_FILE "socket-file"
OPT_SOCKET_FILE_NUM,
#define OPT_TX_CSUM "tx-csum"
OPT_TX_CSUM_NUM,
#define OPT_TSO "tso"
OPT_TSO_NUM,
#define OPT_CLIENT "client"
OPT_CLIENT_NUM,
#define OPT_BUILTIN_NET_DRIVER "builtin-net-driver"
OPT_BUILTIN_NET_DRIVER_NUM,
#define OPT_DMA_TYPE "dma-type"
OPT_DMA_TYPE_NUM,
#define OPT_DMAS "dmas"
OPT_DMAS_NUM,
};
/*
* Parse the arguments given in the command line of the application.
*/
static int
us_vhost_parse_args(int argc, char **argv)
{
int opt, ret;
int option_index;
unsigned i;
const char *prgname = argv[0];
static struct option long_option[] = {
{OPT_VM2VM, required_argument,
NULL, OPT_VM2VM_NUM},
{OPT_RX_RETRY, required_argument,
NULL, OPT_RX_RETRY_NUM},
{OPT_RX_RETRY_DELAY, required_argument,
NULL, OPT_RX_RETRY_DELAY_NUM},
{OPT_RX_RETRY_NUMB, required_argument,
NULL, OPT_RX_RETRY_NUMB_NUM},
{OPT_MERGEABLE, required_argument,
NULL, OPT_MERGEABLE_NUM},
{OPT_STATS, required_argument,
NULL, OPT_STATS_NUM},
{OPT_SOCKET_FILE, required_argument,
NULL, OPT_SOCKET_FILE_NUM},
{OPT_TX_CSUM, required_argument,
NULL, OPT_TX_CSUM_NUM},
{OPT_TSO, required_argument,
NULL, OPT_TSO_NUM},
{OPT_CLIENT, no_argument,
NULL, OPT_CLIENT_NUM},
{OPT_BUILTIN_NET_DRIVER, no_argument,
NULL, OPT_BUILTIN_NET_DRIVER_NUM},
{OPT_DMA_TYPE, required_argument,
NULL, OPT_DMA_TYPE_NUM},
{OPT_DMAS, required_argument,
NULL, OPT_DMAS_NUM},
{NULL, 0, 0, 0},
};
/* Parse command line */
while ((opt = getopt_long(argc, argv, "p:P",
long_option, &option_index)) != EOF) {
switch (opt) {
/* Portmask */
case 'p':
enabled_port_mask = parse_portmask(optarg);
if (enabled_port_mask == 0) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid portmask\n");
us_vhost_usage(prgname);
return -1;
}
break;
case 'P':
promiscuous = 1;
vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.rx_mode =
RTE_ETH_VMDQ_ACCEPT_BROADCAST |
RTE_ETH_VMDQ_ACCEPT_MULTICAST;
break;
case OPT_VM2VM_NUM:
ret = parse_num_opt(optarg, (VM2VM_LAST - 1));
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for "
"vm2vm [0|1|2]\n");
us_vhost_usage(prgname);
return -1;
}
vm2vm_mode = (vm2vm_type)ret;
break;
case OPT_RX_RETRY_NUM:
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry [0|1]\n");
us_vhost_usage(prgname);
return -1;
}
enable_retry = ret;
break;
case OPT_TX_CSUM_NUM:
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for tx-csum [0|1]\n");
us_vhost_usage(prgname);
return -1;
}
enable_tx_csum = ret;
break;
case OPT_TSO_NUM:
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for tso [0|1]\n");
us_vhost_usage(prgname);
return -1;
}
enable_tso = ret;
break;
case OPT_RX_RETRY_DELAY_NUM:
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry-delay [0-N]\n");
us_vhost_usage(prgname);
return -1;
}
burst_rx_delay_time = ret;
break;
case OPT_RX_RETRY_NUMB_NUM:
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry-num [0-N]\n");
us_vhost_usage(prgname);
return -1;
}
burst_rx_retry_num = ret;
break;
case OPT_MERGEABLE_NUM:
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for mergeable [0|1]\n");
us_vhost_usage(prgname);
return -1;
}
mergeable = !!ret;
break;
case OPT_STATS_NUM:
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for stats [0..N]\n");
us_vhost_usage(prgname);
return -1;
}
enable_stats = ret;
break;
/* Set socket file path. */
case OPT_SOCKET_FILE_NUM:
if (us_vhost_parse_socket_path(optarg) == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for socket name (Max %d characters)\n",
PATH_MAX);
us_vhost_usage(prgname);
return -1;
}
break;
case OPT_DMA_TYPE_NUM:
dma_type = optarg;
break;
case OPT_DMAS_NUM:
if (open_dma(optarg) == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Wrong DMA args\n");
us_vhost_usage(prgname);
return -1;
}
async_vhost_driver = 1;
break;
case OPT_CLIENT_NUM:
client_mode = 1;
break;
case OPT_BUILTIN_NET_DRIVER_NUM:
builtin_net_driver = 1;
break;
/* Invalid option - print options. */
default:
us_vhost_usage(prgname);
return -1;
}
}
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (enabled_port_mask & (1 << i))
ports[num_ports++] = i;
}
if ((num_ports == 0) || (num_ports > MAX_SUP_PORTS)) {
RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
"but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS);
return -1;
}
return 0;
}
/*
* Update the global var NUM_PORTS and array PORTS according to system ports number
* and return valid ports number
*/
static unsigned check_ports_num(unsigned nb_ports)
{
unsigned valid_num_ports = num_ports;
unsigned portid;
if (num_ports > nb_ports) {
RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) exceeds total system port number(%u)\n",
num_ports, nb_ports);
num_ports = nb_ports;
}
for (portid = 0; portid < num_ports; portid ++) {
if (!rte_eth_dev_is_valid_port(ports[portid])) {
RTE_LOG(INFO, VHOST_PORT,
"\nSpecified port ID(%u) is not valid\n",
ports[portid]);
ports[portid] = INVALID_PORT_ID;
valid_num_ports--;
}
}
return valid_num_ports;
}
static __rte_always_inline struct vhost_dev *
find_vhost_dev(struct rte_ether_addr *mac)
{
struct vhost_dev *vdev;
TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) {
if (vdev->ready == DEVICE_RX &&
rte_is_same_ether_addr(mac, &vdev->mac_address))
return vdev;
}
return NULL;
}
/*
* This function learns the MAC address of the device and registers this along with a
* vlan tag to a VMDQ.
*/
static int
link_vmdq(struct vhost_dev *vdev, struct rte_mbuf *m)
{
struct rte_ether_hdr *pkt_hdr;
int i, ret;
/* Learn MAC address of guest device from packet */
pkt_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
if (find_vhost_dev(&pkt_hdr->src_addr)) {
RTE_LOG(ERR, VHOST_DATA,
"(%d) device is using a registered MAC!\n",
vdev->vid);
return -1;
}
for (i = 0; i < RTE_ETHER_ADDR_LEN; i++)
vdev->mac_address.addr_bytes[i] =
pkt_hdr->src_addr.addr_bytes[i];
/* vlan_tag currently uses the device_id. */
vdev->vlan_tag = vlan_tags[vdev->vid];
/* Print out VMDQ registration info. */
RTE_LOG(INFO, VHOST_DATA,
"(%d) mac " RTE_ETHER_ADDR_PRT_FMT " and vlan %d registered\n",
vdev->vid, RTE_ETHER_ADDR_BYTES(&vdev->mac_address),
vdev->vlan_tag);
/* Register the MAC address. */
ret = rte_eth_dev_mac_addr_add(ports[0], &vdev->mac_address,
(uint32_t)vdev->vid + vmdq_pool_base);
if (ret)
RTE_LOG(ERR, VHOST_DATA,
"(%d) failed to add device MAC address to VMDQ\n",
vdev->vid);
rte_eth_dev_set_vlan_strip_on_queue(ports[0], vdev->vmdq_rx_q, 1);
/* Set device as ready for RX. */
vdev->ready = DEVICE_RX;
return 0;
}
/*
* Removes MAC address and vlan tag from VMDQ. Ensures that nothing is adding buffers to the RX
* queue before disabling RX on the device.
*/
static inline void
unlink_vmdq(struct vhost_dev *vdev)
{
unsigned i = 0;
unsigned rx_count;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
if (vdev->ready == DEVICE_RX) {
/*clear MAC and VLAN settings*/
rte_eth_dev_mac_addr_remove(ports[0], &vdev->mac_address);
for (i = 0; i < 6; i++)
vdev->mac_address.addr_bytes[i] = 0;
vdev->vlan_tag = 0;
/*Clear out the receive buffers*/
rx_count = rte_eth_rx_burst(ports[0],
(uint16_t)vdev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
while (rx_count) {
for (i = 0; i < rx_count; i++)
rte_pktmbuf_free(pkts_burst[i]);
rx_count = rte_eth_rx_burst(ports[0],
(uint16_t)vdev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
}
vdev->ready = DEVICE_MAC_LEARNING;
}
}
static inline void
free_pkts(struct rte_mbuf **pkts, uint16_t n)
{
while (n--)
rte_pktmbuf_free(pkts[n]);
}
static __rte_always_inline void
complete_async_pkts(struct vhost_dev *vdev)
{
struct rte_mbuf *p_cpl[MAX_PKT_BURST];
uint16_t complete_count;
complete_count = rte_vhost_poll_enqueue_completed(vdev->vid,
VIRTIO_RXQ, p_cpl, MAX_PKT_BURST);
if (complete_count) {
free_pkts(p_cpl, complete_count);
__atomic_sub_fetch(&vdev->pkts_inflight, complete_count, __ATOMIC_SEQ_CST);
}
}
static __rte_always_inline void
sync_virtio_xmit(struct vhost_dev *dst_vdev, struct vhost_dev *src_vdev,
struct rte_mbuf *m)
{
uint16_t ret;
if (builtin_net_driver) {
ret = vs_enqueue_pkts(dst_vdev, VIRTIO_RXQ, &m, 1);
} else {
ret = rte_vhost_enqueue_burst(dst_vdev->vid, VIRTIO_RXQ, &m, 1);
}
if (enable_stats) {
__atomic_add_fetch(&dst_vdev->stats.rx_total_atomic, 1,
__ATOMIC_SEQ_CST);
__atomic_add_fetch(&dst_vdev->stats.rx_atomic, ret,
__ATOMIC_SEQ_CST);
src_vdev->stats.tx_total++;
src_vdev->stats.tx += ret;
}
}
static __rte_always_inline void
drain_vhost(struct vhost_dev *vdev)
{
uint16_t ret;
uint32_t buff_idx = rte_lcore_id() * MAX_VHOST_DEVICE + vdev->vid;
uint16_t nr_xmit = vhost_txbuff[buff_idx]->len;
struct rte_mbuf **m = vhost_txbuff[buff_idx]->m_table;
if (builtin_net_driver) {
ret = vs_enqueue_pkts(vdev, VIRTIO_RXQ, m, nr_xmit);
} else if (async_vhost_driver) {
uint16_t enqueue_fail = 0;
complete_async_pkts(vdev);
ret = rte_vhost_submit_enqueue_burst(vdev->vid, VIRTIO_RXQ, m, nr_xmit);
__atomic_add_fetch(&vdev->pkts_inflight, ret, __ATOMIC_SEQ_CST);
enqueue_fail = nr_xmit - ret;
if (enqueue_fail)
free_pkts(&m[ret], nr_xmit - ret);
} else {
ret = rte_vhost_enqueue_burst(vdev->vid, VIRTIO_RXQ,
m, nr_xmit);
}
if (enable_stats) {
__atomic_add_fetch(&vdev->stats.rx_total_atomic, nr_xmit,
__ATOMIC_SEQ_CST);
__atomic_add_fetch(&vdev->stats.rx_atomic, ret,
__ATOMIC_SEQ_CST);
}
if (!async_vhost_driver)
free_pkts(m, nr_xmit);
}
static __rte_always_inline void
drain_vhost_table(void)
{
uint16_t lcore_id = rte_lcore_id();
struct vhost_bufftable *vhost_txq;
struct vhost_dev *vdev;
uint64_t cur_tsc;
TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) {
if (unlikely(vdev->remove == 1))
continue;
vhost_txq = vhost_txbuff[lcore_id * MAX_VHOST_DEVICE
+ vdev->vid];
cur_tsc = rte_rdtsc();
if (unlikely(cur_tsc - vhost_txq->pre_tsc
> MBUF_TABLE_DRAIN_TSC)) {
RTE_LOG_DP(DEBUG, VHOST_DATA,
"Vhost TX queue drained after timeout with burst size %u\n",
vhost_txq->len);
drain_vhost(vdev);
vhost_txq->len = 0;
vhost_txq->pre_tsc = cur_tsc;
}
}
}
/*
* Check if the packet destination MAC address is for a local device. If so then put
* the packet on that devices RX queue. If not then return.
*/
static __rte_always_inline int
virtio_tx_local(struct vhost_dev *vdev, struct rte_mbuf *m)
{
struct rte_ether_hdr *pkt_hdr;
struct vhost_dev *dst_vdev;
struct vhost_bufftable *vhost_txq;
uint16_t lcore_id = rte_lcore_id();
pkt_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
dst_vdev = find_vhost_dev(&pkt_hdr->dst_addr);
if (!dst_vdev)
return -1;
if (vdev->vid == dst_vdev->vid) {
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) TX: src and dst MAC is same. Dropping packet.\n",
vdev->vid);
return 0;
}
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) TX: MAC address is local\n", dst_vdev->vid);
if (unlikely(dst_vdev->remove)) {
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) device is marked for removal\n", dst_vdev->vid);
return 0;
}
vhost_txq = vhost_txbuff[lcore_id * MAX_VHOST_DEVICE + dst_vdev->vid];
vhost_txq->m_table[vhost_txq->len++] = m;
if (enable_stats) {
vdev->stats.tx_total++;
vdev->stats.tx++;
}
if (unlikely(vhost_txq->len == MAX_PKT_BURST)) {
drain_vhost(dst_vdev);
vhost_txq->len = 0;
vhost_txq->pre_tsc = rte_rdtsc();
}
return 0;
}
/*
* Check if the destination MAC of a packet is one local VM,
* and get its vlan tag, and offset if it is.
*/
static __rte_always_inline int
find_local_dest(struct vhost_dev *vdev, struct rte_mbuf *m,
uint32_t *offset, uint16_t *vlan_tag)
{
struct vhost_dev *dst_vdev;
struct rte_ether_hdr *pkt_hdr =
rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
dst_vdev = find_vhost_dev(&pkt_hdr->dst_addr);
if (!dst_vdev)
return 0;
if (vdev->vid == dst_vdev->vid) {
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) TX: src and dst MAC is same. Dropping packet.\n",
vdev->vid);
return -1;
}
/*
* HW vlan strip will reduce the packet length
* by minus length of vlan tag, so need restore
* the packet length by plus it.
*/
*offset = RTE_VLAN_HLEN;
*vlan_tag = vlan_tags[vdev->vid];
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) TX: pkt to local VM device id: (%d), vlan tag: %u.\n",
vdev->vid, dst_vdev->vid, *vlan_tag);
return 0;
}
static void virtio_tx_offload(struct rte_mbuf *m)
{
struct rte_net_hdr_lens hdr_lens;
struct rte_ipv4_hdr *ipv4_hdr;
struct rte_tcp_hdr *tcp_hdr;
uint32_t ptype;
void *l3_hdr;
ptype = rte_net_get_ptype(m, &hdr_lens, RTE_PTYPE_ALL_MASK);
m->l2_len = hdr_lens.l2_len;
m->l3_len = hdr_lens.l3_len;
m->l4_len = hdr_lens.l4_len;
l3_hdr = rte_pktmbuf_mtod_offset(m, void *, m->l2_len);
tcp_hdr = rte_pktmbuf_mtod_offset(m, struct rte_tcp_hdr *,
m->l2_len + m->l3_len);
m->ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
if ((ptype & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV4) {
m->ol_flags |= RTE_MBUF_F_TX_IPV4;
m->ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
ipv4_hdr = l3_hdr;
ipv4_hdr->hdr_checksum = 0;
tcp_hdr->cksum = rte_ipv4_phdr_cksum(l3_hdr, m->ol_flags);
} else { /* assume ethertype == RTE_ETHER_TYPE_IPV6 */
m->ol_flags |= RTE_MBUF_F_TX_IPV6;
tcp_hdr->cksum = rte_ipv6_phdr_cksum(l3_hdr, m->ol_flags);
}
}
static __rte_always_inline void
do_drain_mbuf_table(struct mbuf_table *tx_q)
{
uint16_t count;
count = rte_eth_tx_burst(ports[0], tx_q->txq_id,
tx_q->m_table, tx_q->len);
if (unlikely(count < tx_q->len))
free_pkts(&tx_q->m_table[count], tx_q->len - count);
tx_q->len = 0;
}
/*
* This function routes the TX packet to the correct interface. This
* may be a local device or the physical port.
*/
static __rte_always_inline void
virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag)
{
struct mbuf_table *tx_q;
unsigned offset = 0;
const uint16_t lcore_id = rte_lcore_id();
struct rte_ether_hdr *nh;
nh = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
if (unlikely(rte_is_broadcast_ether_addr(&nh->dst_addr))) {
struct vhost_dev *vdev2;
TAILQ_FOREACH(vdev2, &vhost_dev_list, global_vdev_entry) {
if (vdev2 != vdev)
sync_virtio_xmit(vdev2, vdev, m);
}
goto queue2nic;
}
/*check if destination is local VM*/
if ((vm2vm_mode == VM2VM_SOFTWARE) && (virtio_tx_local(vdev, m) == 0))
return;
if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) {
if (unlikely(find_local_dest(vdev, m, &offset,
&vlan_tag) != 0)) {
rte_pktmbuf_free(m);
return;
}
}
RTE_LOG_DP(DEBUG, VHOST_DATA,
"(%d) TX: MAC address is external\n", vdev->vid);
queue2nic:
/*Add packet to the port tx queue*/
tx_q = &lcore_tx_queue[lcore_id];
nh = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
if (unlikely(nh->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN))) {
/* Guest has inserted the vlan tag. */
struct rte_vlan_hdr *vh = (struct rte_vlan_hdr *) (nh + 1);
uint16_t vlan_tag_be = rte_cpu_to_be_16(vlan_tag);
if ((vm2vm_mode == VM2VM_HARDWARE) &&
(vh->vlan_tci != vlan_tag_be))
vh->vlan_tci = vlan_tag_be;
} else {
m->ol_flags |= RTE_MBUF_F_TX_VLAN;
/*
* Find the right seg to adjust the data len when offset is
* bigger than tail room size.
*/
if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) {
if (likely(offset <= rte_pktmbuf_tailroom(m)))
m->data_len += offset;
else {
struct rte_mbuf *seg = m;
while ((seg->next != NULL) &&
(offset > rte_pktmbuf_tailroom(seg)))
seg = seg->next;
seg->data_len += offset;
}
m->pkt_len += offset;
}
m->vlan_tci = vlan_tag;
}
if (m->ol_flags & RTE_MBUF_F_RX_LRO)
virtio_tx_offload(m);
tx_q->m_table[tx_q->len++] = m;
if (enable_stats) {
vdev->stats.tx_total++;
vdev->stats.tx++;
}
if (unlikely(tx_q->len == MAX_PKT_BURST))
do_drain_mbuf_table(tx_q);
}
static __rte_always_inline void
drain_mbuf_table(struct mbuf_table *tx_q)
{
static uint64_t prev_tsc;
uint64_t cur_tsc;
if (tx_q->len == 0)
return;
cur_tsc = rte_rdtsc();
if (unlikely(cur_tsc - prev_tsc > MBUF_TABLE_DRAIN_TSC)) {
prev_tsc = cur_tsc;
RTE_LOG_DP(DEBUG, VHOST_DATA,
"TX queue drained after timeout with burst size %u\n",
tx_q->len);
do_drain_mbuf_table(tx_q);
}
}
static __rte_always_inline void
drain_eth_rx(struct vhost_dev *vdev)
{
uint16_t rx_count, enqueue_count;
struct rte_mbuf *pkts[MAX_PKT_BURST];
rx_count = rte_eth_rx_burst(ports[0], vdev->vmdq_rx_q,
pkts, MAX_PKT_BURST);
if (!rx_count)
return;
/*
* When "enable_retry" is set, here we wait and retry when there
* is no enough free slots in the queue to hold @rx_count packets,
* to diminish packet loss.
*/
if (enable_retry &&
unlikely(rx_count > rte_vhost_avail_entries(vdev->vid,
VIRTIO_RXQ))) {
uint32_t retry;
for (retry = 0; retry < burst_rx_retry_num; retry++) {
rte_delay_us(burst_rx_delay_time);
if (rx_count <= rte_vhost_avail_entries(vdev->vid,
VIRTIO_RXQ))
break;
}
}
if (builtin_net_driver) {
enqueue_count = vs_enqueue_pkts(vdev, VIRTIO_RXQ,
pkts, rx_count);
} else if (async_vhost_driver) {
uint16_t enqueue_fail = 0;
complete_async_pkts(vdev);
enqueue_count = rte_vhost_submit_enqueue_burst(vdev->vid,
VIRTIO_RXQ, pkts, rx_count);
__atomic_add_fetch(&vdev->pkts_inflight, enqueue_count, __ATOMIC_SEQ_CST);
enqueue_fail = rx_count - enqueue_count;
if (enqueue_fail)
free_pkts(&pkts[enqueue_count], enqueue_fail);
} else {
enqueue_count = rte_vhost_enqueue_burst(vdev->vid, VIRTIO_RXQ,
pkts, rx_count);
}
if (enable_stats) {
__atomic_add_fetch(&vdev->stats.rx_total_atomic, rx_count,
__ATOMIC_SEQ_CST);
__atomic_add_fetch(&vdev->stats.rx_atomic, enqueue_count,
__ATOMIC_SEQ_CST);
}
if (!async_vhost_driver)
free_pkts(pkts, rx_count);
}
static __rte_always_inline void
drain_virtio_tx(struct vhost_dev *vdev)
{
struct rte_mbuf *pkts[MAX_PKT_BURST];
uint16_t count;
uint16_t i;
if (builtin_net_driver) {
count = vs_dequeue_pkts(vdev, VIRTIO_TXQ, mbuf_pool,
pkts, MAX_PKT_BURST);
} else {
count = rte_vhost_dequeue_burst(vdev->vid, VIRTIO_TXQ,
mbuf_pool, pkts, MAX_PKT_BURST);
}
/* setup VMDq for the first packet */
if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && count) {
if (vdev->remove || link_vmdq(vdev, pkts[0]) == -1)
free_pkts(pkts, count);
}
for (i = 0; i < count; ++i)
virtio_tx_route(vdev, pkts[i], vlan_tags[vdev->vid]);
}
/*
* Main function of vhost-switch. It basically does:
*
* for each vhost device {
* - drain_eth_rx()
*
* Which drains the host eth Rx queue linked to the vhost device,
* and deliver all of them to guest virito Rx ring associated with
* this vhost device.
*
* - drain_virtio_tx()
*
* Which drains the guest virtio Tx queue and deliver all of them
* to the target, which could be another vhost device, or the
* physical eth dev. The route is done in function "virtio_tx_route".
* }
*/
static int
switch_worker(void *arg __rte_unused)
{
unsigned i;
unsigned lcore_id = rte_lcore_id();
struct vhost_dev *vdev;
struct mbuf_table *tx_q;
RTE_LOG(INFO, VHOST_DATA, "Processing on Core %u started\n", lcore_id);
tx_q = &lcore_tx_queue[lcore_id];
for (i = 0; i < rte_lcore_count(); i++) {
if (lcore_ids[i] == lcore_id) {
tx_q->txq_id = i;
break;
}
}
while(1) {
drain_mbuf_table(tx_q);
drain_vhost_table();
/*
* Inform the configuration core that we have exited the
* linked list and that no devices are in use if requested.
*/
if (lcore_info[lcore_id].dev_removal_flag == REQUEST_DEV_REMOVAL)
lcore_info[lcore_id].dev_removal_flag = ACK_DEV_REMOVAL;
/*
* Process vhost devices
*/
TAILQ_FOREACH(vdev, &lcore_info[lcore_id].vdev_list,
lcore_vdev_entry) {
if (unlikely(vdev->remove)) {
unlink_vmdq(vdev);
vdev->ready = DEVICE_SAFE_REMOVE;
continue;
}
if (likely(vdev->ready == DEVICE_RX))
drain_eth_rx(vdev);
if (likely(!vdev->remove))
drain_virtio_tx(vdev);
}
}
return 0;
}
/*
* Remove a device from the specific data core linked list and from the
* main linked list. Synchronization occurs through the use of the
* lcore dev_removal_flag. Device is made volatile here to avoid re-ordering
* of dev->remove=1 which can cause an infinite loop in the rte_pause loop.
*/
static void
destroy_device(int vid)
{
struct vhost_dev *vdev = NULL;
int lcore;
uint16_t i;
TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) {
if (vdev->vid == vid)
break;
}
if (!vdev)
return;
/*set the remove flag. */
vdev->remove = 1;
while(vdev->ready != DEVICE_SAFE_REMOVE) {
rte_pause();
}
for (i = 0; i < RTE_MAX_LCORE; i++)
rte_free(vhost_txbuff[i * MAX_VHOST_DEVICE + vid]);
if (builtin_net_driver)
vs_vhost_net_remove(vdev);
TAILQ_REMOVE(&lcore_info[vdev->coreid].vdev_list, vdev,
lcore_vdev_entry);
TAILQ_REMOVE(&vhost_dev_list, vdev, global_vdev_entry);
/* Set the dev_removal_flag on each lcore. */
RTE_LCORE_FOREACH_WORKER(lcore)
lcore_info[lcore].dev_removal_flag = REQUEST_DEV_REMOVAL;
/*
* Once each core has set the dev_removal_flag to ACK_DEV_REMOVAL
* we can be sure that they can no longer access the device removed
* from the linked lists and that the devices are no longer in use.
*/
RTE_LCORE_FOREACH_WORKER(lcore) {
while (lcore_info[lcore].dev_removal_flag != ACK_DEV_REMOVAL)
rte_pause();
}
lcore_info[vdev->coreid].device_num--;
RTE_LOG(INFO, VHOST_DATA,
"(%d) device has been removed from data core\n",
vdev->vid);
if (async_vhost_driver) {
uint16_t n_pkt = 0;
struct rte_mbuf *m_cpl[vdev->pkts_inflight];
while (vdev->pkts_inflight) {
n_pkt = rte_vhost_clear_queue_thread_unsafe(vid, VIRTIO_RXQ,
m_cpl, vdev->pkts_inflight);
free_pkts(m_cpl, n_pkt);
__atomic_sub_fetch(&vdev->pkts_inflight, n_pkt, __ATOMIC_SEQ_CST);
}
rte_vhost_async_channel_unregister(vid, VIRTIO_RXQ);
}
rte_free(vdev);
}
/*
* A new device is added to a data core. First the device is added to the main linked list
* and then allocated to a specific data core.
*/
static int
new_device(int vid)
{
int lcore, core_add = 0;
uint16_t i;
uint32_t device_num_min = num_devices;
struct vhost_dev *vdev;
vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
if (vdev == NULL) {
RTE_LOG(INFO, VHOST_DATA,
"(%d) couldn't allocate memory for vhost dev\n",
vid);
return -1;
}
vdev->vid = vid;
for (i = 0; i < RTE_MAX_LCORE; i++) {
vhost_txbuff[i * MAX_VHOST_DEVICE + vid]
= rte_zmalloc("vhost bufftable",
sizeof(struct vhost_bufftable),
RTE_CACHE_LINE_SIZE);
if (vhost_txbuff[i * MAX_VHOST_DEVICE + vid] == NULL) {
RTE_LOG(INFO, VHOST_DATA,
"(%d) couldn't allocate memory for vhost TX\n", vid);
return -1;
}
}
if (builtin_net_driver)
vs_vhost_net_setup(vdev);
TAILQ_INSERT_TAIL(&vhost_dev_list, vdev, global_vdev_entry);
vdev->vmdq_rx_q = vid * queues_per_pool + vmdq_queue_base;
/*reset ready flag*/
vdev->ready = DEVICE_MAC_LEARNING;
vdev->remove = 0;
/* Find a suitable lcore to add the device. */
RTE_LCORE_FOREACH_WORKER(lcore) {
if (lcore_info[lcore].device_num < device_num_min) {
device_num_min = lcore_info[lcore].device_num;
core_add = lcore;
}
}
vdev->coreid = core_add;
TAILQ_INSERT_TAIL(&lcore_info[vdev->coreid].vdev_list, vdev,
lcore_vdev_entry);
lcore_info[vdev->coreid].device_num++;
/* Disable notifications. */
rte_vhost_enable_guest_notification(vid, VIRTIO_RXQ, 0);
rte_vhost_enable_guest_notification(vid, VIRTIO_TXQ, 0);
RTE_LOG(INFO, VHOST_DATA,
"(%d) device has been added to data core %d\n",
vid, vdev->coreid);
if (async_vhost_driver) {
struct rte_vhost_async_config config = {0};
struct rte_vhost_async_channel_ops channel_ops;
if (dma_type != NULL && strncmp(dma_type, "ioat", 4) == 0) {
channel_ops.transfer_data = ioat_transfer_data_cb;
channel_ops.check_completed_copies =
ioat_check_completed_copies_cb;
config.features = RTE_VHOST_ASYNC_INORDER;
return rte_vhost_async_channel_register(vid, VIRTIO_RXQ,
config, &channel_ops);
}
}
return 0;
}
static int
vring_state_changed(int vid, uint16_t queue_id, int enable)
{
struct vhost_dev *vdev = NULL;
TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) {
if (vdev->vid == vid)
break;
}
if (!vdev)
return -1;
if (queue_id != VIRTIO_RXQ)
return 0;
if (async_vhost_driver) {
if (!enable) {
uint16_t n_pkt = 0;
struct rte_mbuf *m_cpl[vdev->pkts_inflight];
while (vdev->pkts_inflight) {
n_pkt = rte_vhost_clear_queue_thread_unsafe(vid, queue_id,
m_cpl, vdev->pkts_inflight);
free_pkts(m_cpl, n_pkt);
__atomic_sub_fetch(&vdev->pkts_inflight, n_pkt, __ATOMIC_SEQ_CST);
}
}
}
return 0;
}
/*
* These callback allow devices to be added to the data core when configuration
* has been fully complete.
*/
static const struct rte_vhost_device_ops virtio_net_device_ops =
{
.new_device = new_device,
.destroy_device = destroy_device,
.vring_state_changed = vring_state_changed,
};
/*
* This is a thread will wake up after a period to print stats if the user has
* enabled them.
*/
static void *
print_stats(__rte_unused void *arg)
{
struct vhost_dev *vdev;
uint64_t tx_dropped, rx_dropped;
uint64_t tx, tx_total, rx, rx_total;
const char clr[] = { 27, '[', '2', 'J', '\0' };
const char top_left[] = { 27, '[', '1', ';', '1', 'H','\0' };
while(1) {
sleep(enable_stats);
/* Clear screen and move to top left */
printf("%s%s\n", clr, top_left);
printf("Device statistics =================================\n");
TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) {
tx_total = vdev->stats.tx_total;
tx = vdev->stats.tx;
tx_dropped = tx_total - tx;
rx_total = __atomic_load_n(&vdev->stats.rx_total_atomic,
__ATOMIC_SEQ_CST);
rx = __atomic_load_n(&vdev->stats.rx_atomic,
__ATOMIC_SEQ_CST);
rx_dropped = rx_total - rx;
printf("Statistics for device %d\n"
"-----------------------\n"
"TX total: %" PRIu64 "\n"
"TX dropped: %" PRIu64 "\n"
"TX successful: %" PRIu64 "\n"
"RX total: %" PRIu64 "\n"
"RX dropped: %" PRIu64 "\n"
"RX successful: %" PRIu64 "\n",
vdev->vid,
tx_total, tx_dropped, tx,
rx_total, rx_dropped, rx);
}
printf("===================================================\n");
fflush(stdout);
}
return NULL;
}
static void
unregister_drivers(int socket_num)
{
int i, ret;
for (i = 0; i < socket_num; i++) {
ret = rte_vhost_driver_unregister(socket_files + i * PATH_MAX);
if (ret != 0)
RTE_LOG(ERR, VHOST_CONFIG,
"Fail to unregister vhost driver for %s.\n",
socket_files + i * PATH_MAX);
}
}
/* When we receive a INT signal, unregister vhost driver */
static void
sigint_handler(__rte_unused int signum)
{
/* Unregister vhost driver. */
unregister_drivers(nb_sockets);
exit(0);
}
/*
* While creating an mbuf pool, one key thing is to figure out how
* many mbuf entries is enough for our use. FYI, here are some
* guidelines:
*
* - Each rx queue would reserve @nr_rx_desc mbufs at queue setup stage
*
* - For each switch core (A CPU core does the packet switch), we need
* also make some reservation for receiving the packets from virtio
* Tx queue. How many is enough depends on the usage. It's normally
* a simple calculation like following:
*
* MAX_PKT_BURST * max packet size / mbuf size
*
* So, we definitely need allocate more mbufs when TSO is enabled.
*
* - Similarly, for each switching core, we should serve @nr_rx_desc
* mbufs for receiving the packets from physical NIC device.
*
* - We also need make sure, for each switch core, we have allocated
* enough mbufs to fill up the mbuf cache.
*/
static void
create_mbuf_pool(uint16_t nr_port, uint32_t nr_switch_core, uint32_t mbuf_size,
uint32_t nr_queues, uint32_t nr_rx_desc, uint32_t nr_mbuf_cache)
{
uint32_t nr_mbufs;
uint32_t nr_mbufs_per_core;
uint32_t mtu = 1500;
if (mergeable)
mtu = 9000;
if (enable_tso)
mtu = 64 * 1024;
nr_mbufs_per_core = (mtu + mbuf_size) * MAX_PKT_BURST /
(mbuf_size - RTE_PKTMBUF_HEADROOM);
nr_mbufs_per_core += nr_rx_desc;
nr_mbufs_per_core = RTE_MAX(nr_mbufs_per_core, nr_mbuf_cache);
nr_mbufs = nr_queues * nr_rx_desc;
nr_mbufs += nr_mbufs_per_core * nr_switch_core;
nr_mbufs *= nr_port;
mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", nr_mbufs,
nr_mbuf_cache, 0, mbuf_size,
rte_socket_id());
if (mbuf_pool == NULL)
rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
}
/*
* Main function, does initialisation and calls the per-lcore functions.
*/
int
main(int argc, char *argv[])
{
unsigned lcore_id, core_id = 0;
unsigned nb_ports, valid_num_ports;
int ret, i;
uint16_t portid;
static pthread_t tid;
uint64_t flags = RTE_VHOST_USER_NET_COMPLIANT_OL_FLAGS;
signal(SIGINT, sigint_handler);
/* init EAL */
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
argc -= ret;
argv += ret;
/* parse app arguments */
ret = us_vhost_parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Invalid argument\n");
for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
TAILQ_INIT(&lcore_info[lcore_id].vdev_list);
if (rte_lcore_is_enabled(lcore_id))
lcore_ids[core_id++] = lcore_id;
}
if (rte_lcore_count() > RTE_MAX_LCORE)
rte_exit(EXIT_FAILURE,"Not enough cores\n");
/* Get the number of physical ports. */
nb_ports = rte_eth_dev_count_avail();
/*
* Update the global var NUM_PORTS and global array PORTS
* and get value of var VALID_NUM_PORTS according to system ports number
*/
valid_num_ports = check_ports_num(nb_ports);
if ((valid_num_ports == 0) || (valid_num_ports > MAX_SUP_PORTS)) {
RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
"but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS);
return -1;
}
/*
* FIXME: here we are trying to allocate mbufs big enough for
* @MAX_QUEUES, but the truth is we're never going to use that
* many queues here. We probably should only do allocation for
* those queues we are going to use.
*/
create_mbuf_pool(valid_num_ports, rte_lcore_count() - 1, MBUF_DATA_SIZE,
MAX_QUEUES, RTE_TEST_RX_DESC_DEFAULT, MBUF_CACHE_SIZE);
if (vm2vm_mode == VM2VM_HARDWARE) {
/* Enable VT loop back to let L2 switch to do it. */
vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.enable_loop_back = 1;
RTE_LOG(DEBUG, VHOST_CONFIG,
"Enable loop back for L2 switch in vmdq.\n");
}
/* initialize all ports */
RTE_ETH_FOREACH_DEV(portid) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << portid)) == 0) {
RTE_LOG(INFO, VHOST_PORT,
"Skipping disabled port %d\n", portid);
continue;
}
if (port_init(portid) != 0)
rte_exit(EXIT_FAILURE,
"Cannot initialize network ports\n");
}
/* Enable stats if the user option is set. */
if (enable_stats) {
ret = rte_ctrl_thread_create(&tid, "print-stats", NULL,
print_stats, NULL);
if (ret < 0)
rte_exit(EXIT_FAILURE,
"Cannot create print-stats thread\n");
}
/* Launch all data cores. */
RTE_LCORE_FOREACH_WORKER(lcore_id)
rte_eal_remote_launch(switch_worker, NULL, lcore_id);
if (client_mode)
flags |= RTE_VHOST_USER_CLIENT;
/* Register vhost user driver to handle vhost messages. */
for (i = 0; i < nb_sockets; i++) {
char *file = socket_files + i * PATH_MAX;
if (async_vhost_driver)
flags = flags | RTE_VHOST_USER_ASYNC_COPY;
ret = rte_vhost_driver_register(file, flags);
if (ret != 0) {
unregister_drivers(i);
rte_exit(EXIT_FAILURE,
"vhost driver register failure.\n");
}
if (builtin_net_driver)
rte_vhost_driver_set_features(file, VIRTIO_NET_FEATURES);
if (mergeable == 0) {
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_MRG_RXBUF);
}
if (enable_tx_csum == 0) {
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_CSUM);
}
if (enable_tso == 0) {
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_HOST_TSO4);
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_HOST_TSO6);
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_GUEST_TSO4);
rte_vhost_driver_disable_features(file,
1ULL << VIRTIO_NET_F_GUEST_TSO6);
}
if (promiscuous) {
rte_vhost_driver_enable_features(file,
1ULL << VIRTIO_NET_F_CTRL_RX);
}
ret = rte_vhost_driver_callback_register(file,
&virtio_net_device_ops);
if (ret != 0) {
rte_exit(EXIT_FAILURE,
"failed to register vhost driver callbacks.\n");
}
if (rte_vhost_driver_start(file) < 0) {
rte_exit(EXIT_FAILURE,
"failed to start vhost driver.\n");
}
}
RTE_LCORE_FOREACH_WORKER(lcore_id)
rte_eal_wait_lcore(lcore_id);
/* clean up the EAL */
rte_eal_cleanup();
return 0;
}
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