--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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_atomic.h>
+#include <rte_cycles.h>
+#include <rte_ethdev.h>
+#include <rte_log.h>
+#include <rte_string_fns.h>
+#include <rte_malloc.h>
+#include <rte_virtio_net.h>
+
+#include "main.h"
+
+/* the maximum number of external ports supported */
+#define MAX_SUP_PORTS 1
+
+/**
+ * Calculate the number of buffers needed per port
+ */
+#define NUM_MBUFS_PER_PORT ((MAX_QUEUES * RTE_TEST_RX_DESC_DEFAULT) +\
+ (nb_switching_cores * MAX_PKT_BURST) +\
+ (nb_switching_cores * \
+ RTE_TEST_TX_DESC_DEFAULT) +\
+ (nb_switching_cores * MBUF_CACHE_SIZE))
+
+#define MBUF_CACHE_SIZE 128
+#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
+
+#define MAX_PKT_BURST 32 /* Max burst size for RX/TX */
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+
+/* Defines how long we wait between retries on RX */
+#define BURST_RX_WAIT_US 15
+
+#define BURST_RX_RETRIES 4 /* Number of retries on RX. */
+
+#define JUMBO_FRAME_MAX_SIZE 0x2600
+
+/* State of virtio device. */
+#define DEVICE_MAC_LEARNING 0
+#define DEVICE_RX 1
+#define DEVICE_SAFE_REMOVE 2
+
+/* Config_core_flag status definitions. */
+#define REQUEST_DEV_REMOVAL 1
+#define ACK_DEV_REMOVAL 0
+
+/* Configurable number of RX/TX ring descriptors */
+#define RTE_TEST_RX_DESC_DEFAULT 1024
+#define RTE_TEST_TX_DESC_DEFAULT 512
+
+/* Get first 4 bytes in mbuf headroom. */
+#define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
+ + sizeof(struct rte_mbuf)))
+
+#define INVALID_PORT_ID 0xFF
+
+/* Size of buffers used for snprintfs. */
+#define MAX_PRINT_BUFF 6072
+
+/* Maximum character device basename size. */
+#define MAX_BASENAME_SZ 20
+
+/* Maximum long option length for option parsing. */
+#define MAX_LONG_OPT_SZ 64
+
+/* Used to compare MAC addresses. */
+#define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
+
+#define CMD_LINE_OPT_NB_DEVICES "nb-devices"
+#define CMD_LINE_OPT_RX_RETRY "rx-retry"
+#define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
+#define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
+#define CMD_LINE_OPT_STATS "stats"
+#define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
+
+/* mask of enabled ports */
+static uint32_t enabled_port_mask;
+
+/*Number of switching cores enabled*/
+static uint32_t nb_switching_cores;
+
+/* number of devices/queues to support*/
+uint32_t nb_devices;
+
+/* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
+#define MAX_RING_DESC 4096
+
+struct vpool {
+ struct rte_mempool *pool;
+ struct rte_ring *ring;
+ uint32_t buf_size;
+} vpool_array[MAX_QUEUES+MAX_QUEUES];
+
+/* Enable stats. */
+uint32_t enable_stats = 0;
+/* Enable retries on RX. */
+static uint32_t enable_retry = 1;
+/* 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;
+
+/* Character device basename. Can be set by user. */
+static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
+
+static unsigned lcore_ids[RTE_MAX_LCORE];
+uint8_t ports[RTE_MAX_ETHPORTS];
+
+static unsigned nb_ports; /**< The number of ports specified in command line */
+
+/* ethernet addresses of ports */
+struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
+
+/* heads for the main used and free linked lists for the data path. */
+static struct virtio_net_data_ll *ll_root_used;
+static struct virtio_net_data_ll *ll_root_free;
+
+/**
+ * Array of data core structures containing information on
+ * individual core linked lists.
+ */
+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];
+};
+
+/* TX queue for each data core. */
+struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
+
+struct device_statistics dev_statistics[MAX_DEVICES];
+
+/**
+ * Set character device basename.
+ */
+static int
+us_vhost_parse_basename(const char *q_arg)
+{
+ /* parse number string */
+ if (strlen(q_arg) >= MAX_BASENAME_SZ)
+ return -1;
+ else
+ snprintf((char *)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg);
+
+ return 0;
+}
+
+/**
+ * Parse the portmask provided at run time.
+ */
+static int
+parse_portmask(const char *portmask)
+{
+ char *end = NULL;
+ unsigned long pm;
+
+ /* parse hexadecimal string */
+ pm = strtoul(portmask, &end, 16);
+ if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+ return -1;
+
+ if (pm == 0)
+ return -1;
+
+ 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;
+
+ /* parse unsigned int string */
+ num = strtoul(q_arg, &end, 10);
+ if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+ return -1;
+
+ if (num > max_valid_value)
+ return -1;
+
+ return num;
+}
+
+/**
+ * Display usage
+ */
+static void
+tep_termination_usage(const char *prgname)
+{
+ RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
+ " --nb-devices[1-64]: The number of virtIO device\n"
+ " -p PORTMASK: Set mask for ports to be used by application\n"
+ " --rx-retry [0|1]: disable/enable(default) retries on rx."
+ " Enable retry if destintation 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"
+ " --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
+ " --dev-basename: The basename to be used for the character device.\n",
+ prgname);
+}
+
+/**
+ * Parse the arguments given in the command line of the application.
+ */
+static int
+tep_termination_parse_args(int argc, char **argv)
+{
+ int opt, ret;
+ int option_index;
+ unsigned i;
+ const char *prgname = argv[0];
+ static struct option long_option[] = {
+ {CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
+ {CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
+ {CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
+ {CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
+ {CMD_LINE_OPT_STATS, required_argument, NULL, 0},
+ {CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
+ {NULL, 0, 0, 0},
+ };
+
+ /* Parse command line */
+ while ((opt = getopt_long(argc, argv, "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");
+ tep_termination_usage(prgname);
+ return -1;
+ }
+ break;
+ case 0:
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_NB_DEVICES,
+ sizeof(CMD_LINE_OPT_NB_DEVICES))) {
+ ret = parse_num_opt(optarg, MAX_DEVICES);
+ if (ret == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Invalid argument for nb-devices [0-%d]\n",
+ MAX_DEVICES);
+ tep_termination_usage(prgname);
+ return -1;
+ } else
+ nb_devices = ret;
+ }
+
+ /* Enable/disable retries on RX. */
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_RX_RETRY,
+ sizeof(CMD_LINE_OPT_RX_RETRY))) {
+ ret = parse_num_opt(optarg, 1);
+ if (ret == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Invalid argument for rx-retry [0|1]\n");
+ tep_termination_usage(prgname);
+ return -1;
+ } else {
+ enable_retry = ret;
+ }
+ }
+
+ /* Specify the retries delay time (in useconds) on RX.*/
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_RX_RETRY_DELAY,
+ sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
+ ret = parse_num_opt(optarg, INT32_MAX);
+ if (ret == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Invalid argument for rx-retry-delay [0-N]\n");
+ tep_termination_usage(prgname);
+ return -1;
+ } else {
+ burst_rx_delay_time = ret;
+ }
+ }
+
+ /* Specify the retries number on RX. */
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_RX_RETRY_NUM,
+ sizeof(CMD_LINE_OPT_RX_RETRY_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");
+ tep_termination_usage(prgname);
+ return -1;
+ } else {
+ burst_rx_retry_num = ret;
+ }
+ }
+
+ /* Enable/disable stats. */
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_STATS,
+ sizeof(CMD_LINE_OPT_STATS))) {
+ ret = parse_num_opt(optarg, INT32_MAX);
+ if (ret == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Invalid argument for stats [0..N]\n");
+ tep_termination_usage(prgname);
+ return -1;
+ } else {
+ enable_stats = ret;
+ }
+ }
+
+ /* Set character device basename. */
+ if (!strncmp(long_option[option_index].name,
+ CMD_LINE_OPT_DEV_BASENAME,
+ sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
+ if (us_vhost_parse_basename(optarg) == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Invalid argument for character "
+ "device basename (Max %d characters)\n",
+ MAX_BASENAME_SZ);
+ tep_termination_usage(prgname);
+ return -1;
+ }
+ }
+
+ break;
+
+ /* Invalid option - print options. */
+ default:
+ tep_termination_usage(prgname);
+ return -1;
+ }
+ }
+
+ for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
+ if (enabled_port_mask & (1 << i))
+ ports[nb_ports++] = (uint8_t)i;
+ }
+
+ if ((nb_ports == 0) || (nb_ports > MAX_SUP_PORTS)) {
+ RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
+ "but only %u port can be enabled\n", nb_ports,
+ MAX_SUP_PORTS);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * Update the global var NB_PORTS and array PORTS
+ * according to system ports number and return valid ports number
+ */
+static unsigned
+check_ports_num(unsigned max_nb_ports)
+{
+ unsigned valid_nb_ports = nb_ports;
+ unsigned portid;
+
+ if (nb_ports > max_nb_ports) {
+ RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
+ " exceeds total system port number(%u)\n",
+ nb_ports, max_nb_ports);
+ nb_ports = max_nb_ports;
+ }
+
+ for (portid = 0; portid < nb_ports; portid++) {
+ if (ports[portid] >= max_nb_ports) {
+ RTE_LOG(INFO, VHOST_PORT,
+ "\nSpecified port ID(%u) exceeds max "
+ " system port ID(%u)\n",
+ ports[portid], (max_nb_ports - 1));
+ ports[portid] = INVALID_PORT_ID;
+ valid_nb_ports--;
+ }
+ }
+ return valid_nb_ports;
+}
+
+/**
+ * This function routes the TX packet to the correct interface. This may be a local device
+ * or the physical port.
+ */
+static inline void __attribute__((always_inline))
+virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
+{
+ struct mbuf_table *tx_q;
+ struct rte_mbuf **m_table;
+ unsigned len, ret = 0;
+ const uint16_t lcore_id = rte_lcore_id();
+ struct virtio_net *dev = vdev->dev;
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is external\n",
+ dev->device_fh);
+
+ /* Add packet to the port tx queue */
+ tx_q = &lcore_tx_queue[lcore_id];
+ len = tx_q->len;
+
+ tx_q->m_table[len] = m;
+ len++;
+ if (enable_stats) {
+ dev_statistics[dev->device_fh].tx_total++;
+ dev_statistics[dev->device_fh].tx++;
+ }
+
+ if (unlikely(len == MAX_PKT_BURST)) {
+ m_table = (struct rte_mbuf **)tx_q->m_table;
+ /* Free any buffers not handled by TX and update
+ * the port stats.
+ */
+ if (unlikely(ret < len)) {
+ do {
+ rte_pktmbuf_free(m_table[ret]);
+ } while (++ret < len);
+ }
+
+ len = 0;
+ }
+
+ tx_q->len = len;
+ return;
+}
+
+/**
+ * This function is called by each data core. It handles all
+ * RX/TX registered with the core. For TX the specific lcore
+ * linked list is used. For RX, MAC addresses are compared
+ * with all devices in the main linked list.
+ */
+static int
+switch_worker(__rte_unused void *arg)
+{
+ struct rte_mempool *mbuf_pool = arg;
+ struct virtio_net *dev = NULL;
+ struct vhost_dev *vdev = NULL;
+ struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+ struct virtio_net_data_ll *dev_ll;
+ struct mbuf_table *tx_q;
+ volatile struct lcore_ll_info *lcore_ll;
+ const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
+ / US_PER_S * BURST_TX_DRAIN_US;
+ uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
+ unsigned i, ret = 0;
+ const uint16_t lcore_id = rte_lcore_id();
+ const uint16_t num_cores = (uint16_t)rte_lcore_count();
+ uint16_t rx_count = 0;
+ uint16_t tx_count;
+ uint32_t retry = 0;
+
+ RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
+ lcore_ll = lcore_info[lcore_id].lcore_ll;
+ prev_tsc = 0;
+
+ tx_q = &lcore_tx_queue[lcore_id];
+ for (i = 0; i < num_cores; i++) {
+ if (lcore_ids[i] == lcore_id) {
+ tx_q->txq_id = i;
+ break;
+ }
+ }
+
+ while (1) {
+ cur_tsc = rte_rdtsc();
+ /*
+ * TX burst queue drain
+ */
+ diff_tsc = cur_tsc - prev_tsc;
+ if (unlikely(diff_tsc > drain_tsc)) {
+
+ if (tx_q->len) {
+ LOG_DEBUG(VHOST_DATA, "TX queue drained after "
+ "timeout with burst size %u\n",
+ tx_q->len);
+ if (unlikely(ret < tx_q->len)) {
+ do {
+ rte_pktmbuf_free(tx_q->m_table[ret]);
+ } while (++ret < tx_q->len);
+ }
+
+ tx_q->len = 0;
+ }
+
+ prev_tsc = cur_tsc;
+
+ }
+
+ rte_prefetch0(lcore_ll->ll_root_used);
+
+ /**
+ * Inform the configuration core that we have exited
+ * the linked list and that no devices are
+ * in use if requested.
+ */
+ if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
+ lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
+
+ /*
+ * Process devices
+ */
+ dev_ll = lcore_ll->ll_root_used;
+
+ while (dev_ll != NULL) {
+ vdev = dev_ll->vdev;
+ dev = vdev->dev;
+
+ if (unlikely(vdev->remove)) {
+ dev_ll = dev_ll->next;
+ vdev->ready = DEVICE_SAFE_REMOVE;
+ continue;
+ }
+ if (likely(vdev->ready == DEVICE_RX)) {
+ /* Handle guest RX */
+ rx_count = rte_eth_rx_burst(ports[0],
+ vdev->rx_q, pkts_burst, MAX_PKT_BURST);
+
+ if (rx_count) {
+ /*
+ * Retry is enabled and the queue is
+ * full then we wait and retry to
+ * avoid packet loss. Here MAX_PKT_BURST
+ * must be less than virtio queue size
+ */
+ if (enable_retry && unlikely(rx_count >
+ rte_vring_available_entries(dev, VIRTIO_RXQ))) {
+ for (retry = 0; retry < burst_rx_retry_num;
+ retry++) {
+ rte_delay_us(burst_rx_delay_time);
+ if (rx_count <= rte_vring_available_entries(dev, VIRTIO_RXQ))
+ break;
+ }
+ }
+
+ if (enable_stats) {
+ rte_atomic64_add(
+ &dev_statistics[dev->device_fh].rx_total_atomic,
+ rx_count);
+ rte_atomic64_add(
+ &dev_statistics[dev->device_fh].rx_atomic, ret_count);
+ }
+ while (likely(rx_count)) {
+ rx_count--;
+ rte_pktmbuf_free(pkts_burst[rx_count]);
+ }
+
+ }
+ }
+
+ if (likely(!vdev->remove)) {
+ /* Handle guest TX*/
+ tx_count = rte_vhost_dequeue_burst(dev,
+ VIRTIO_TXQ, mbuf_pool,
+ pkts_burst, MAX_PKT_BURST);
+ /* If this is the first received packet we need to learn the MAC */
+ if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
+ if (vdev->remove) {
+ while (tx_count)
+ rte_pktmbuf_free(pkts_burst[--tx_count]);
+ }
+ }
+ while (tx_count)
+ virtio_tx_route(vdev, pkts_burst[--tx_count]);
+ }
+
+ /* move to the next device in the list */
+ dev_ll = dev_ll->next;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * Add an entry to a used linked list. A free entry must first be found
+ * in the free linked list using get_data_ll_free_entry();
+ */
+static void
+add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
+ struct virtio_net_data_ll *ll_dev)
+{
+ struct virtio_net_data_ll *ll = *ll_root_addr;
+
+ /* Set next as NULL and use a compiler barrier to avoid reordering. */
+ ll_dev->next = NULL;
+ rte_compiler_barrier();
+
+ /* If ll == NULL then this is the first device. */
+ if (ll) {
+ /* Increment to the tail of the linked list. */
+ while (ll->next != NULL)
+ ll = ll->next;
+
+ ll->next = ll_dev;
+ } else {
+ *ll_root_addr = ll_dev;
+ }
+}
+
+/**
+ * Remove an entry from a used linked list. The entry must then be added to
+ * the free linked list using put_data_ll_free_entry().
+ */
+static void
+rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
+ struct virtio_net_data_ll *ll_dev,
+ struct virtio_net_data_ll *ll_dev_last)
+{
+ struct virtio_net_data_ll *ll = *ll_root_addr;
+
+ if (unlikely((ll == NULL) || (ll_dev == NULL)))
+ return;
+
+ if (ll_dev == ll)
+ *ll_root_addr = ll_dev->next;
+ else
+ if (likely(ll_dev_last != NULL))
+ ll_dev_last->next = ll_dev->next;
+ else
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Remove entry form ll failed.\n");
+}
+
+/**
+ * Find and return an entry from the free linked list.
+ */
+static struct virtio_net_data_ll *
+get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
+{
+ struct virtio_net_data_ll *ll_free = *ll_root_addr;
+ struct virtio_net_data_ll *ll_dev;
+
+ if (ll_free == NULL)
+ return NULL;
+
+ ll_dev = ll_free;
+ *ll_root_addr = ll_free->next;
+
+ return ll_dev;
+}
+
+/**
+ * Place an entry back on to the free linked list.
+ */
+static void
+put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
+ struct virtio_net_data_ll *ll_dev)
+{
+ struct virtio_net_data_ll *ll_free = *ll_root_addr;
+
+ if (ll_dev == NULL)
+ return;
+
+ ll_dev->next = ll_free;
+ *ll_root_addr = ll_dev;
+}
+
+/**
+ * Creates a linked list of a given size.
+ */
+static struct virtio_net_data_ll *
+alloc_data_ll(uint32_t size)
+{
+ struct virtio_net_data_ll *ll_new;
+ uint32_t i;
+
+ /* Malloc and then chain the linked list. */
+ ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
+ if (ll_new == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to allocate memory for ll_new.\n");
+ return NULL;
+ }
+
+ for (i = 0; i < size - 1; i++) {
+ ll_new[i].vdev = NULL;
+ ll_new[i].next = &ll_new[i+1];
+ }
+ ll_new[i].next = NULL;
+
+ return ll_new;
+}
+
+/**
+ * Create the main linked list along with each individual cores
+ * linked list. A used and a free list are created to manage entries.
+ */
+static int
+init_data_ll(void)
+{
+ int lcore;
+
+ RTE_LCORE_FOREACH_SLAVE(lcore) {
+ lcore_info[lcore].lcore_ll =
+ malloc(sizeof(struct lcore_ll_info));
+ if (lcore_info[lcore].lcore_ll == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to allocate memory for lcore_ll.\n");
+ return -1;
+ }
+
+ lcore_info[lcore].lcore_ll->device_num = 0;
+ lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
+ lcore_info[lcore].lcore_ll->ll_root_used = NULL;
+ if (nb_devices % nb_switching_cores)
+ lcore_info[lcore].lcore_ll->ll_root_free =
+ alloc_data_ll((nb_devices / nb_switching_cores)
+ + 1);
+ else
+ lcore_info[lcore].lcore_ll->ll_root_free =
+ alloc_data_ll(nb_devices / nb_switching_cores);
+ }
+
+ /* Allocate devices up to a maximum of MAX_DEVICES. */
+ ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
+
+ return 0;
+}
+
+/**
+ * Remove a device from the specific data core linked list and
+ * from the main linked list. Synchonization 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(volatile struct virtio_net *dev)
+{
+ struct virtio_net_data_ll *ll_lcore_dev_cur;
+ struct virtio_net_data_ll *ll_main_dev_cur;
+ struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
+ struct virtio_net_data_ll *ll_main_dev_last = NULL;
+ struct vhost_dev *vdev;
+ int lcore;
+
+ dev->flags &= ~VIRTIO_DEV_RUNNING;
+
+ vdev = (struct vhost_dev *)dev->priv;
+
+ /* set the remove flag. */
+ vdev->remove = 1;
+ while (vdev->ready != DEVICE_SAFE_REMOVE)
+ rte_pause();
+
+ /* Search for entry to be removed from lcore ll */
+ ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
+ while (ll_lcore_dev_cur != NULL) {
+ if (ll_lcore_dev_cur->vdev == vdev) {
+ break;
+ } else {
+ ll_lcore_dev_last = ll_lcore_dev_cur;
+ ll_lcore_dev_cur = ll_lcore_dev_cur->next;
+ }
+ }
+
+ if (ll_lcore_dev_cur == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find the dev to be destroy.\n",
+ dev->device_fh);
+ return;
+ }
+
+ /* Search for entry to be removed from main ll */
+ ll_main_dev_cur = ll_root_used;
+ ll_main_dev_last = NULL;
+ while (ll_main_dev_cur != NULL) {
+ if (ll_main_dev_cur->vdev == vdev) {
+ break;
+ } else {
+ ll_main_dev_last = ll_main_dev_cur;
+ ll_main_dev_cur = ll_main_dev_cur->next;
+ }
+ }
+
+ /* Remove entries from the lcore and main ll. */
+ rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
+ ll_lcore_dev_cur, ll_lcore_dev_last);
+ rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
+
+ /* Set the dev_removal_flag on each lcore. */
+ RTE_LCORE_FOREACH_SLAVE(lcore) {
+ lcore_info[lcore].lcore_ll->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_SLAVE(lcore) {
+ while (lcore_info[lcore].lcore_ll->dev_removal_flag
+ != ACK_DEV_REMOVAL)
+ rte_pause();
+ }
+
+ /* Add the entries back to the lcore and main free ll.*/
+ put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
+ ll_lcore_dev_cur);
+ put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
+
+ /* Decrement number of device on the lcore. */
+ lcore_info[vdev->coreid].lcore_ll->device_num--;
+
+ RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been removed "
+ "from data core\n", dev->device_fh);
+
+ rte_free(vdev);
+
+}
+
+/**
+ * A new device is added to a data core. First the device is added
+ * to the main linked list and the allocated to a specific data core.
+ */
+static int
+new_device(struct virtio_net *dev)
+{
+ struct virtio_net_data_ll *ll_dev;
+ int lcore, core_add = 0;
+ uint32_t device_num_min = nb_devices;
+ struct vhost_dev *vdev;
+
+ vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
+ if (vdev == NULL) {
+ RTE_LOG(INFO, VHOST_DATA,
+ "(%"PRIu64") Couldn't allocate memory for vhost dev\n",
+ dev->device_fh);
+ return -1;
+ }
+ vdev->dev = dev;
+ dev->priv = vdev;
+ /* Add device to main ll */
+ ll_dev = get_data_ll_free_entry(&ll_root_free);
+ if (ll_dev == NULL) {
+ RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in"
+ " linked list Device limit of %d devices per core"
+ " has been reached\n", dev->device_fh, nb_devices);
+ if (vdev->regions_hpa)
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
+ return -1;
+ }
+ ll_dev->vdev = vdev;
+ add_data_ll_entry(&ll_root_used, ll_dev);
+ vdev->rx_q = dev->device_fh;
+
+ /* reset ready flag */
+ vdev->ready = DEVICE_MAC_LEARNING;
+ vdev->remove = 0;
+
+ /* Find a suitable lcore to add the device. */
+ RTE_LCORE_FOREACH_SLAVE(lcore) {
+ if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
+ device_num_min = lcore_info[lcore].lcore_ll->device_num;
+ core_add = lcore;
+ }
+ }
+ /* Add device to lcore ll */
+ ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
+ if (ll_dev == NULL) {
+ RTE_LOG(INFO, VHOST_DATA,
+ "(%"PRIu64") Failed to add device to data core\n",
+ dev->device_fh);
+ vdev->ready = DEVICE_SAFE_REMOVE;
+ destroy_device(dev);
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
+ return -1;
+ }
+ ll_dev->vdev = vdev;
+ vdev->coreid = core_add;
+
+ add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
+ ll_dev);
+
+ /* Initialize device stats */
+ memset(&dev_statistics[dev->device_fh], 0,
+ sizeof(struct device_statistics));
+
+ /* Disable notifications. */
+ rte_vhost_enable_guest_notification(dev, VIRTIO_RXQ, 0);
+ rte_vhost_enable_guest_notification(dev, VIRTIO_TXQ, 0);
+ lcore_info[vdev->coreid].lcore_ll->device_num++;
+ dev->flags |= VIRTIO_DEV_RUNNING;
+
+ RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data core %d\n",
+ dev->device_fh, vdev->coreid);
+
+ return 0;
+}
+
+/**
+ * These callback allow devices to be added to the data core when configuration
+ * has been fully complete.
+ */
+static const struct virtio_net_device_ops virtio_net_device_ops = {
+ .new_device = new_device,
+ .destroy_device = destroy_device,
+};
+
+/**
+ * This is a thread will wake up after a period to print stats if the user has
+ * enabled them.
+ */
+static void
+print_stats(void)
+{
+ struct virtio_net_data_ll *dev_ll;
+ uint64_t tx_dropped, rx_dropped;
+ uint64_t tx, tx_total, rx, rx_total;
+ uint32_t device_fh;
+ 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", clr, top_left);
+
+ printf("\nDevice statistics ================================");
+
+ dev_ll = ll_root_used;
+ while (dev_ll != NULL) {
+ device_fh = (uint32_t)dev_ll->vdev->dev->device_fh;
+ tx_total = dev_statistics[device_fh].tx_total;
+ tx = dev_statistics[device_fh].tx;
+ tx_dropped = tx_total - tx;
+
+ rx_total = rte_atomic64_read(
+ &dev_statistics[device_fh].rx_total_atomic);
+ rx = rte_atomic64_read(
+ &dev_statistics[device_fh].rx_atomic);
+ rx_dropped = rx_total - rx;
+
+ printf("\nStatistics for device %"PRIu32" ----------"
+ "\nTX total: %"PRIu64""
+ "\nTX dropped: %"PRIu64""
+ "\nTX successful: %"PRIu64""
+ "\nRX total: %"PRIu64""
+ "\nRX dropped: %"PRIu64""
+ "\nRX successful: %"PRIu64"",
+ device_fh,
+ tx_total,
+ tx_dropped,
+ tx,
+ rx_total,
+ rx_dropped,
+ rx);
+
+ dev_ll = dev_ll->next;
+ }
+ printf("\n================================================\n");
+ }
+}
+
+/**
+ * Main function, does initialisation and calls the per-lcore functions. The CUSE
+ * device is also registered here to handle the IOCTLs.
+ */
+int
+main(int argc, char *argv[])
+{
+ struct rte_mempool *mbuf_pool = NULL;
+ unsigned lcore_id, core_id = 0;
+ unsigned nb_ports, valid_nb_ports;
+ int ret;
+ uint8_t portid;
+ uint16_t queue_id;
+ static pthread_t tid;
+
+ /* 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 = tep_termination_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++)
+ if (rte_lcore_is_enabled(lcore_id))
+ lcore_ids[core_id++] = lcore_id;
+
+ /* set the number of swithcing cores available */
+ nb_switching_cores = rte_lcore_count()-1;
+
+ /* Get the number of physical ports. */
+ nb_ports = rte_eth_dev_count();
+ if (nb_ports > RTE_MAX_ETHPORTS)
+ nb_ports = RTE_MAX_ETHPORTS;
+
+ /*
+ * Update the global var NB_PORTS and global array PORTS
+ * and get value of var VALID_NB_PORTS according to system ports number
+ */
+ valid_nb_ports = check_ports_num(nb_ports);
+
+ if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
+ rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
+ "but only %u port can be enabled\n", nb_ports,
+ MAX_SUP_PORTS);
+ }
+
+ /* Create the mbuf pool. */
+ mbuf_pool = rte_mempool_create(
+ "MBUF_POOL",
+ NUM_MBUFS_PER_PORT
+ * valid_nb_ports,
+ MBUF_SIZE, MBUF_CACHE_SIZE,
+ sizeof(struct rte_pktmbuf_pool_private),
+ rte_pktmbuf_pool_init, NULL,
+ rte_pktmbuf_init, NULL,
+ rte_socket_id(), 0);
+ if (mbuf_pool == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+
+ for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
+ vpool_array[queue_id].pool = mbuf_pool;
+
+ /* Set log level. */
+ rte_set_log_level(LOG_LEVEL);
+
+ /* initialize all ports */
+ for (portid = 0; portid < nb_ports; 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;
+ }
+ }
+
+ /* Initialise all linked lists. */
+ if (init_data_ll() == -1)
+ rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
+
+ /* Initialize device stats */
+ memset(&dev_statistics, 0, sizeof(dev_statistics));
+
+ /* Enable stats if the user option is set. */
+ if (enable_stats)
+ pthread_create(&tid, NULL, (void *)print_stats, NULL);
+
+ /* Launch all data cores. */
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ rte_eal_remote_launch(switch_worker,
+ mbuf_pool, lcore_id);
+ }
+
+ rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF);
+
+ /* Register CUSE device to handle IOCTLs. */
+ ret = rte_vhost_driver_register((char *)&dev_basename);
+ if (ret != 0)
+ rte_exit(EXIT_FAILURE, "CUSE device setup failure.\n");
+
+ rte_vhost_driver_callback_register(&virtio_net_device_ops);
+
+ /* Start CUSE session. */
+ rte_vhost_driver_session_start();
+
+ return 0;
+}
git.droids-corp.org / dpdk.git / commitdiff