void
attach_port(char *identifier)
{
portid_t pi = 0;
unsigned int socket_id;
printf("Attaching a new port...\n");
if (identifier == NULL) {
printf("Invalid parameters are specified\n");
return;
}
if (rte_eth_dev_attach(identifier, &pi))
return;
ports[pi].enabled = 1;
socket_id = (unsigned)rte_eth_dev_socket_id(pi);
/* if socket_id is invalid, set to 0 */
if (check_socket_id(socket_id) < 0)
socket_id = 0;
reconfig(pi, socket_id);
rte_eth_promiscuous_enable(pi);
nb_ports = rte_eth_dev_count();
ports[pi].port_status = RTE_PORT_STOPPED;
printf("Port %d is attached. Now total ports is %d\n", pi, nb_ports);
printf("Done\n");
}
http://dpdk.org/doc/guides/prog_guide/port_hotplug_framework.html
To attach new physical device ports, the device will be recognized by userspace driver I/O framework in kernel at first. Then DPDK applications can call the Port Hotplug functions to attach the ports. For detaching, steps are vice versa.
typedef uint8_t portid_t;
| int rte_eth_dev_attach | ( | const char * | devargs, |
| uint8_t * | port_id | ||
| ) |
Attach a new Ethernet device specified by aruguments.
- Parameters
devargs A pointer to a strings array describing the new device to be attached. The strings should be a pci address like '0000:01:00.0' or virtual device name like 'net_pcap0'. port_id A pointer to a port identifier actually attached.
- Returns
- 0 on success and port_id is filled, negative on error
| int rte_eth_dev_detach | ( | uint8_t | port_id, |
| char * | devname | ||
| ) |
Detach a Ethernet device specified by port identifier. This function must be called when the device is in the closed state.
- Parameters
port_id The port identifier of the device to detach. devname A pointer to a device name actually detached.
- Returns
- 0 on success and devname is filled, negative on error
plugins/dpdk/device/init.c