DPDK  19.11.10
examples/vdpa/main.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Intel Corporation
*/
#include <getopt.h>
#include <signal.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_vhost.h>
#include <rte_vdpa.h>
#include <rte_pci.h>
#include <rte_string_fns.h>
#include <cmdline_parse.h>
#include <cmdline_socket.h>
#include <cmdline_parse_string.h>
#include <cmdline.h>
#define MAX_PATH_LEN 128
#define MAX_VDPA_SAMPLE_PORTS 1024
#define RTE_LOGTYPE_VDPA RTE_LOGTYPE_USER1
struct vdpa_port {
char ifname[MAX_PATH_LEN];
int did;
int vid;
uint64_t flags;
};
static struct vdpa_port vports[MAX_VDPA_SAMPLE_PORTS];
static char iface[MAX_PATH_LEN];
static int dev_total;
static int devcnt;
static int interactive;
static int client_mode;
/* display usage */
static void
vdpa_usage(const char *prgname)
{
printf("Usage: %s [EAL options] -- "
" --interactive|-i: run in interactive mode.\n"
" --iface <path>: specify the path prefix of the socket files, e.g. /tmp/vhost-user-.\n"
" --client: register a vhost-user socket as client mode.\n",
prgname);
}
static int
parse_args(int argc, char **argv)
{
static const char *short_option = "i";
static struct option long_option[] = {
{"iface", required_argument, NULL, 0},
{"interactive", no_argument, &interactive, 1},
{"client", no_argument, &client_mode, 1},
{NULL, 0, 0, 0},
};
int opt, idx;
char *prgname = argv[0];
while ((opt = getopt_long(argc, argv, short_option, long_option, &idx))
!= EOF) {
switch (opt) {
case 'i':
printf("Interactive-mode selected\n");
interactive = 1;
break;
/* long options */
case 0:
if (strncmp(long_option[idx].name, "iface",
MAX_PATH_LEN) == 0) {
rte_strscpy(iface, optarg, MAX_PATH_LEN);
printf("iface %s\n", iface);
}
if (!strcmp(long_option[idx].name, "interactive")) {
printf("Interactive-mode selected\n");
interactive = 1;
}
break;
default:
vdpa_usage(prgname);
return -1;
}
}
if (iface[0] == '\0' && interactive == 0) {
vdpa_usage(prgname);
return -1;
}
return 0;
}
static int
new_device(int vid)
{
char ifname[MAX_PATH_LEN];
int i;
rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
for (i = 0; i < MAX_VDPA_SAMPLE_PORTS; i++) {
if (strncmp(ifname, vports[i].ifname, MAX_PATH_LEN) == 0) {
printf("\nnew port %s, did: %d\n",
ifname, vports[i].did);
vports[i].vid = vid;
break;
}
}
if (i >= MAX_VDPA_SAMPLE_PORTS)
return -1;
return 0;
}
static void
destroy_device(int vid)
{
char ifname[MAX_PATH_LEN];
int i;
rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
for (i = 0; i < MAX_VDPA_SAMPLE_PORTS; i++) {
if (strcmp(ifname, vports[i].ifname) == 0) {
printf("\ndestroy port %s, did: %d\n",
ifname, vports[i].did);
break;
}
}
}
static const struct vhost_device_ops vdpa_sample_devops = {
.destroy_device = destroy_device,
};
static int
start_vdpa(struct vdpa_port *vport)
{
int ret;
char *socket_path = vport->ifname;
int did = vport->did;
if (client_mode)
vport->flags |= RTE_VHOST_USER_CLIENT;
if (access(socket_path, F_OK) != -1 && !client_mode) {
RTE_LOG(ERR, VDPA,
"%s exists, please remove it or specify another file and try again.\n",
socket_path);
return -1;
}
ret = rte_vhost_driver_register(socket_path, vport->flags);
if (ret != 0)
rte_exit(EXIT_FAILURE,
"register driver failed: %s\n",
socket_path);
ret = rte_vhost_driver_callback_register(socket_path,
&vdpa_sample_devops);
if (ret != 0)
rte_exit(EXIT_FAILURE,
"register driver ops failed: %s\n",
socket_path);
ret = rte_vhost_driver_attach_vdpa_device(socket_path, did);
if (ret != 0)
rte_exit(EXIT_FAILURE,
"attach vdpa device failed: %s\n",
socket_path);
if (rte_vhost_driver_start(socket_path) < 0)
rte_exit(EXIT_FAILURE,
"start vhost driver failed: %s\n",
socket_path);
return 0;
}
static void
close_vdpa(struct vdpa_port *vport)
{
int ret;
char *socket_path = vport->ifname;
if (ret != 0)
RTE_LOG(ERR, VDPA,
"detach vdpa device failed: %s\n",
socket_path);
ret = rte_vhost_driver_unregister(socket_path);
if (ret != 0)
RTE_LOG(ERR, VDPA,
"Fail to unregister vhost driver for %s.\n",
socket_path);
}
static void
vdpa_sample_quit(void)
{
int i;
for (i = 0; i < RTE_MIN(MAX_VDPA_SAMPLE_PORTS, dev_total); i++) {
if (vports[i].ifname[0] != '\0')
close_vdpa(&vports[i]);
}
}
static void
signal_handler(int signum)
{
if (signum == SIGINT || signum == SIGTERM) {
printf("\nSignal %d received, preparing to exit...\n", signum);
vdpa_sample_quit();
exit(0);
}
}
/* interactive cmds */
/* *** Help command with introduction. *** */
struct cmd_help_result {
cmdline_fixed_string_t help;
};
static void cmd_help_parsed(__attribute__((unused)) void *parsed_result,
struct cmdline *cl,
__attribute__((unused)) void *data)
{
cmdline_printf(
cl,
"\n"
"The following commands are currently available:\n\n"
"Control:\n"
" help : Show interactive instructions.\n"
" list : list all available vdpa devices.\n"
" create <socket file> <vdev addr> : create a new vdpa port.\n"
" quit : exit vdpa sample app.\n"
);
}
cmdline_parse_token_string_t cmd_help_help =
TOKEN_STRING_INITIALIZER(struct cmd_help_result, help, "help");
cmdline_parse_inst_t cmd_help = {
.f = cmd_help_parsed,
.data = NULL,
.help_str = "show help",
.tokens = {
(void *)&cmd_help_help,
NULL,
},
};
/* *** List all available vdpa devices *** */
struct cmd_list_result {
cmdline_fixed_string_t action;
};
static void cmd_list_vdpa_devices_parsed(
__attribute__((unused)) void *parsed_result,
struct cmdline *cl,
__attribute__((unused)) void *data)
{
int did;
uint32_t queue_num;
uint64_t features;
struct rte_vdpa_device *vdev;
struct rte_pci_addr addr;
cmdline_printf(cl, "device id\tdevice address\tqueue num\tsupported features\n");
for (did = 0; did < dev_total; did++) {
vdev = rte_vdpa_get_device(did);
if (!vdev)
continue;
if (vdev->ops->get_queue_num(did, &queue_num) < 0) {
RTE_LOG(ERR, VDPA,
"failed to get vdpa queue number "
"for device id %d.\n", did);
continue;
}
if (vdev->ops->get_features(did, &features) < 0) {
RTE_LOG(ERR, VDPA,
"failed to get vdpa features "
"for device id %d.\n", did);
continue;
}
addr = vdev->addr.pci_addr;
cmdline_printf(cl,
"%d\t\t" PCI_PRI_FMT "\t%" PRIu32 "\t\t0x%" PRIx64 "\n",
did, addr.domain, addr.bus, addr.devid,
addr.function, queue_num, features);
}
}
cmdline_parse_token_string_t cmd_action_list =
TOKEN_STRING_INITIALIZER(struct cmd_list_result, action, "list");
cmdline_parse_inst_t cmd_list_vdpa_devices = {
.f = cmd_list_vdpa_devices_parsed,
.data = NULL,
.help_str = "list all available vdpa devices",
.tokens = {
(void *)&cmd_action_list,
NULL,
},
};
/* *** Create new vdpa port *** */
struct cmd_create_result {
cmdline_fixed_string_t action;
cmdline_fixed_string_t socket_path;
cmdline_fixed_string_t bdf;
};
static void cmd_create_vdpa_port_parsed(void *parsed_result,
struct cmdline *cl,
__attribute__((unused)) void *data)
{
int did;
struct cmd_create_result *res = parsed_result;
struct rte_vdpa_dev_addr addr;
rte_strscpy(vports[devcnt].ifname, res->socket_path, MAX_PATH_LEN);
if (rte_pci_addr_parse(res->bdf, &addr.pci_addr) != 0) {
cmdline_printf(cl, "Unable to parse the given bdf.\n");
return;
}
addr.type = PCI_ADDR;
if (did < 0) {
cmdline_printf(cl, "Unable to find vdpa device id.\n");
return;
}
vports[devcnt].did = did;
if (start_vdpa(&vports[devcnt]) == 0)
devcnt++;
}
cmdline_parse_token_string_t cmd_action_create =
TOKEN_STRING_INITIALIZER(struct cmd_create_result, action, "create");
cmdline_parse_token_string_t cmd_socket_path =
TOKEN_STRING_INITIALIZER(struct cmd_create_result, socket_path, NULL);
cmdline_parse_token_string_t cmd_bdf =
TOKEN_STRING_INITIALIZER(struct cmd_create_result, bdf, NULL);
cmdline_parse_inst_t cmd_create_vdpa_port = {
.f = cmd_create_vdpa_port_parsed,
.data = NULL,
.help_str = "create a new vdpa port",
.tokens = {
(void *)&cmd_action_create,
(void *)&cmd_socket_path,
(void *)&cmd_bdf,
NULL,
},
};
/* *** QUIT *** */
struct cmd_quit_result {
cmdline_fixed_string_t quit;
};
static void cmd_quit_parsed(__attribute__((unused)) void *parsed_result,
struct cmdline *cl,
__attribute__((unused)) void *data)
{
vdpa_sample_quit();
cmdline_quit(cl);
}
cmdline_parse_token_string_t cmd_quit_quit =
TOKEN_STRING_INITIALIZER(struct cmd_quit_result, quit, "quit");
cmdline_parse_inst_t cmd_quit = {
.f = cmd_quit_parsed,
.data = NULL,
.help_str = "quit: exit application",
.tokens = {
(void *)&cmd_quit_quit,
NULL,
},
};
cmdline_parse_ctx_t main_ctx[] = {
(cmdline_parse_inst_t *)&cmd_help,
(cmdline_parse_inst_t *)&cmd_list_vdpa_devices,
(cmdline_parse_inst_t *)&cmd_create_vdpa_port,
(cmdline_parse_inst_t *)&cmd_quit,
NULL,
};
int
main(int argc, char *argv[])
{
char ch;
int i;
int ret;
struct cmdline *cl;
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "eal init failed\n");
argc -= ret;
argv += ret;
dev_total = rte_vdpa_get_device_num();
if (dev_total <= 0)
rte_exit(EXIT_FAILURE, "No available vdpa device found\n");
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
ret = parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "invalid argument\n");
if (interactive == 1) {
cl = cmdline_stdin_new(main_ctx, "vdpa> ");
if (cl == NULL)
rte_panic("Cannot create cmdline instance\n");
cmdline_interact(cl);
cmdline_stdin_exit(cl);
} else {
for (i = 0; i < RTE_MIN(MAX_VDPA_SAMPLE_PORTS, dev_total);
i++) {
vports[i].did = i;
snprintf(vports[i].ifname, MAX_PATH_LEN, "%s%d",
iface, i);
start_vdpa(&vports[i]);
}
printf("enter \'q\' to quit\n");
while (scanf("%c", &ch)) {
if (ch == 'q')
break;
while (ch != '\n') {
if (scanf("%c", &ch))
printf("%c", ch);
}
printf("enter \'q\' to quit\n");
}
vdpa_sample_quit();
}
/* clean up the EAL */
return 0;
}