diff options
| author |   C.J. Collier <cjcollier@linuxfoundation.org> | 2016-06-14 07:50:17 -0700 |
|---|---|---|
| committer | C.J. Collier <cjcollier@linuxfoundation.org> | 2016-06-14 12:17:54 -0700 |
| commit | 97f17497d162afdb82c8704bf097f0fee3724b2e (patch) | |
| tree | 1c6269614c0c15ffef8451c58ae8f8b30a1bc804 /examples/vhost/main.c | |
| parent | e04be89c2409570e0055b2cda60bd11395bb93b0 (diff) | |
Imported Upstream version 16.04
Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>
Diffstat (limited to 'examples/vhost/main.c')
| -rw-r--r-- | examples/vhost/main.c | 3157 |
1 files changed, 3157 insertions, 0 deletions
diff --git a/examples/vhost/main.c b/examples/vhost/main.c new file mode 100644 index 00000000..28c17afd --- /dev/null +++ b/examples/vhost/main.c @@ -0,0 +1,3157 @@ +/*- + * 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 <rte_ip.h> +#include <rte_tcp.h> + +#include "main.h" + +#ifndef MAX_QUEUES +#define MAX_QUEUES 128 +#endif + +/* 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) + \ + (num_switching_cores*MAX_PKT_BURST) + \ + (num_switching_cores*RTE_TEST_TX_DESC_DEFAULT) +\ + ((num_switching_cores+1)*MBUF_CACHE_SIZE)) + +#define MBUF_CACHE_SIZE 128 +#define MBUF_DATA_SIZE RTE_MBUF_DEFAULT_BUF_SIZE + +/* + * No frame data buffer allocated from host are required for zero copy + * implementation, guest will allocate the frame data buffer, and vhost + * directly use it. + */ +#define VIRTIO_DESCRIPTOR_LEN_ZCP RTE_MBUF_DEFAULT_DATAROOM +#define MBUF_DATA_SIZE_ZCP RTE_MBUF_DEFAULT_BUF_SIZE +#define MBUF_CACHE_SIZE_ZCP 0 + +#define MAX_PKT_BURST 32 /* Max burst size for RX/TX */ +#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 + +/* 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 + +/* + * Need refine these 2 macros for legacy and DPDK based front end: + * Max vring avail descriptor/entries from guest - MAX_PKT_BURST + * And then adjust power 2. + */ +/* + * For legacy front end, 128 descriptors, + * half for virtio header, another half for mbuf. + */ +#define RTE_TEST_RX_DESC_DEFAULT_ZCP 32 /* legacy: 32, DPDK virt FE: 128. */ +#define RTE_TEST_TX_DESC_DEFAULT_ZCP 64 /* legacy: 64, DPDK virt FE: 64. */ + +/* Get first 4 bytes in mbuf headroom. */ +#define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \ + + sizeof(struct rte_mbuf))) + +/* true if x is a power of 2 */ +#define POWEROF2(x) ((((x)-1) & (x)) == 0) + +#define INVALID_PORT_ID 0xFF + +/* Max number of devices. Limited by vmdq. */ +#define MAX_DEVICES 64 + +/* Size of buffers used for snprintfs. */ +#define MAX_PRINT_BUFF 6072 + +/* Maximum character device basename size. */ +#define MAX_BASENAME_SZ 10 + +/* Maximum long option length for option parsing. */ +#define MAX_LONG_OPT_SZ 64 + +/* Used to compare MAC addresses. */ +#define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL + +/* Number of descriptors per cacheline. */ +#define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc)) + +#define MBUF_EXT_MEM(mb) (rte_mbuf_from_indirect(mb) != (mb)) + +/* mask of enabled ports */ +static uint32_t enabled_port_mask = 0; + +/* Promiscuous mode */ +static uint32_t promiscuous; + +/*Number of switching cores enabled*/ +static uint32_t num_switching_cores = 0; + +/* number of devices/queues to support*/ +static uint32_t num_queues = 0; +static uint32_t num_devices; + +/* + * Enable zero copy, pkts buffer will directly dma to hw descriptor, + * disabled on default. + */ +static uint32_t zero_copy; +static int mergeable; + +/* Do vlan strip on host, enabled on default */ +static uint32_t vlan_strip = 1; + +/* number of descriptors to apply*/ +static uint32_t num_rx_descriptor = RTE_TEST_RX_DESC_DEFAULT_ZCP; +static uint32_t num_tx_descriptor = RTE_TEST_TX_DESC_DEFAULT_ZCP; + +/* 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 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; + +/* The type of host physical address translated from guest physical address. */ +typedef enum { + PHYS_ADDR_CONTINUOUS = 0, + PHYS_ADDR_CROSS_SUBREG = 1, + PHYS_ADDR_INVALID = 2, + PHYS_ADDR_LAST +} hpa_type; + +/* 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; + +/* 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"; + +/* empty vmdq configuration structure. Filled in programatically */ +static struct rte_eth_conf vmdq_conf_default = { + .rxmode = { + .mq_mode = ETH_MQ_RX_VMDQ_ONLY, + .split_hdr_size = 0, + .header_split = 0, /**< Header Split disabled */ + .hw_ip_checksum = 0, /**< IP checksum offload disabled */ + .hw_vlan_filter = 0, /**< VLAN filtering disabled */ + /* + * It is necessary for 1G NIC such as I350, + * this fixes bug of ipv4 forwarding in guest can't + * forward pakets from one virtio dev to another virtio dev. + */ + .hw_vlan_strip = 1, /**< VLAN strip enabled. */ + .jumbo_frame = 0, /**< Jumbo Frame Support disabled */ + .hw_strip_crc = 0, /**< CRC stripped by hardware */ + }, + + .txmode = { + .mq_mode = ETH_MQ_TX_NONE, + }, + .rx_adv_conf = { + /* + * should be overridden separately in code with + * appropriate values + */ + .vmdq_rx_conf = { + .nb_queue_pools = 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 uint8_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; + +static const uint16_t external_pkt_default_vlan_tag = 2000; +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 ether_addr vmdq_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 = NULL; +static struct virtio_net_data_ll *ll_root_free = NULL; + +/* 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]; + +/* TX queue fori each virtio device for zero copy. */ +struct mbuf_table tx_queue_zcp[MAX_QUEUES]; + +/* Vlan header struct used to insert vlan tags on TX. */ +struct vlan_ethhdr { + unsigned char h_dest[ETH_ALEN]; + unsigned char h_source[ETH_ALEN]; + __be16 h_vlan_proto; + __be16 h_vlan_TCI; + __be16 h_vlan_encapsulated_proto; +}; + +/* Header lengths. */ +#define VLAN_HLEN 4 +#define VLAN_ETH_HLEN 18 + +/* Per-device statistics struct */ +struct device_statistics { + uint64_t tx_total; + rte_atomic64_t rx_total_atomic; + uint64_t rx_total; + uint64_t tx; + rte_atomic64_t rx_atomic; + uint64_t rx; +} __rte_cache_aligned; +struct device_statistics dev_statistics[MAX_DEVICES]; + +/* + * 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(ð_conf->rx_adv_conf.vmdq_rx_conf, &conf, + sizeof(eth_conf->rx_adv_conf.vmdq_rx_conf))); + return 0; +} + +/* + * Validate the device number according to the max pool number gotten form + * dev_info. If the device number is invalid, give the error message and + * return -1. Each device must have its own pool. + */ +static inline int +validate_num_devices(uint32_t max_nb_devices) +{ + if (num_devices > max_nb_devices) { + RTE_LOG(ERR, VHOST_PORT, "invalid number of devices\n"); + return -1; + } + 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(uint8_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 */ + rte_eth_dev_info_get (port, &dev_info); + + if (dev_info.max_rx_queues > MAX_QUEUES) { + rte_exit(EXIT_FAILURE, + "please define MAX_QUEUES no less than %u in %s\n", + dev_info.max_rx_queues, __FILE__); + } + + rxconf = &dev_info.default_rxconf; + txconf = &dev_info.default_txconf; + rxconf->rx_drop_en = 1; + + /* Enable vlan offload */ + txconf->txq_flags &= ~ETH_TXQ_FLAGS_NOVLANOFFL; + + /* + * Zero copy defers queue RX/TX start to the time when guest + * finishes its startup and packet buffers from that guest are + * available. + */ + if (zero_copy) { + rxconf->rx_deferred_start = 1; + rxconf->rx_drop_en = 0; + txconf->tx_deferred_start = 1; + } + + /*configure the number of supported virtio devices based on VMDQ limits */ + num_devices = dev_info.max_vmdq_pools; + + if (zero_copy) { + rx_ring_size = num_rx_descriptor; + tx_ring_size = num_tx_descriptor; + tx_rings = dev_info.max_tx_queues; + } else { + rx_ring_size = RTE_TEST_RX_DESC_DEFAULT; + tx_ring_size = RTE_TEST_TX_DESC_DEFAULT; + tx_rings = (uint16_t)rte_lcore_count(); + } + + retval = validate_num_devices(MAX_DEVICES); + if (retval < 0) + return retval; + + /* 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 (port >= rte_eth_dev_count()) return -1; + + if (enable_tx_csum == 0) + rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_CSUM); + + if (enable_tso == 0) { + rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_HOST_TSO4); + rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_HOST_TSO6); + } + + rx_rings = (uint16_t)dev_info.max_rx_queues; + /* Configure ethernet device. */ + retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); + if (retval != 0) + return retval; + + /* Setup the queues. */ + 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, + vpool_array[q].pool); + if (retval < 0) + return retval; + } + 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) + return retval; + } + + /* Start the device. */ + retval = rte_eth_dev_start(port); + if (retval < 0) { + RTE_LOG(ERR, VHOST_DATA, "Failed to start the device.\n"); + return retval; + } + + if (promiscuous) + rte_eth_promiscuous_enable(port); + + rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]); + 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", + (unsigned)port, + vmdq_ports_eth_addr[port].addr_bytes[0], + vmdq_ports_eth_addr[port].addr_bytes[1], + vmdq_ports_eth_addr[port].addr_bytes[2], + vmdq_ports_eth_addr[port].addr_bytes[3], + vmdq_ports_eth_addr[port].addr_bytes[4], + vmdq_ports_eth_addr[port].addr_bytes[5]); + + return 0; +} + +/* + * Set character device basename. + */ +static int +us_vhost_parse_basename(const char *q_arg) +{ + /* parse number string */ + + if (strnlen(q_arg, MAX_BASENAME_SZ) > 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; + + errno = 0; + + /* parse hexadecimal string */ + pm = strtoul(portmask, &end, 16); + if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 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; + + 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" + " --dev-basename <name>\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 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" + " --mergeable [0|1]: disable(default)/enable RX mergeable buffers\n" + " --vlan-strip [0|1]: disable/enable(default) RX VLAN strip on host\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" + " --zero-copy [0|1]: disable(default)/enable rx/tx " + "zero copy\n" + " --rx-desc-num [0-N]: the number of descriptors on rx, " + "used only when zero copy is enabled.\n" + " --tx-desc-num [0-N]: the number of descriptors on tx, " + "used only when zero copy is enabled.\n" + " --tx-csum [0|1] disable/enable TX checksum offload.\n" + " --tso [0|1] disable/enable TCP segment offload.\n", + prgname); +} + +/* + * 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[] = { + {"vm2vm", required_argument, NULL, 0}, + {"rx-retry", required_argument, NULL, 0}, + {"rx-retry-delay", required_argument, NULL, 0}, + {"rx-retry-num", required_argument, NULL, 0}, + {"mergeable", required_argument, NULL, 0}, + {"vlan-strip", required_argument, NULL, 0}, + {"stats", required_argument, NULL, 0}, + {"dev-basename", required_argument, NULL, 0}, + {"zero-copy", required_argument, NULL, 0}, + {"rx-desc-num", required_argument, NULL, 0}, + {"tx-desc-num", required_argument, NULL, 0}, + {"tx-csum", required_argument, NULL, 0}, + {"tso", required_argument, NULL, 0}, + {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 = + ETH_VMDQ_ACCEPT_BROADCAST | + ETH_VMDQ_ACCEPT_MULTICAST; + rte_vhost_feature_enable(1ULL << VIRTIO_NET_F_CTRL_RX); + + break; + + case 0: + /* Enable/disable vm2vm comms. */ + if (!strncmp(long_option[option_index].name, "vm2vm", + MAX_LONG_OPT_SZ)) { + 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; + } else { + vm2vm_mode = (vm2vm_type)ret; + } + } + + /* Enable/disable retries on RX. */ + if (!strncmp(long_option[option_index].name, "rx-retry", MAX_LONG_OPT_SZ)) { + 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; + } else { + enable_retry = ret; + } + } + + /* Enable/disable TX checksum offload. */ + if (!strncmp(long_option[option_index].name, "tx-csum", MAX_LONG_OPT_SZ)) { + 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; + } else + enable_tx_csum = ret; + } + + /* Enable/disable TSO offload. */ + if (!strncmp(long_option[option_index].name, "tso", MAX_LONG_OPT_SZ)) { + 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; + } else + enable_tso = ret; + } + + /* Specify the retries delay time (in useconds) on RX. */ + if (!strncmp(long_option[option_index].name, "rx-retry-delay", MAX_LONG_OPT_SZ)) { + 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; + } else { + burst_rx_delay_time = ret; + } + } + + /* Specify the retries number on RX. */ + if (!strncmp(long_option[option_index].name, "rx-retry-num", MAX_LONG_OPT_SZ)) { + 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; + } else { + burst_rx_retry_num = ret; + } + } + + /* Enable/disable RX mergeable buffers. */ + if (!strncmp(long_option[option_index].name, "mergeable", MAX_LONG_OPT_SZ)) { + 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; + } else { + mergeable = !!ret; + if (ret) { + vmdq_conf_default.rxmode.jumbo_frame = 1; + vmdq_conf_default.rxmode.max_rx_pkt_len + = JUMBO_FRAME_MAX_SIZE; + } + } + } + + /* Enable/disable RX VLAN strip on host. */ + if (!strncmp(long_option[option_index].name, + "vlan-strip", MAX_LONG_OPT_SZ)) { + ret = parse_num_opt(optarg, 1); + if (ret == -1) { + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument for VLAN strip [0|1]\n"); + us_vhost_usage(prgname); + return -1; + } else { + vlan_strip = !!ret; + vmdq_conf_default.rxmode.hw_vlan_strip = + vlan_strip; + } + } + + /* Enable/disable stats. */ + if (!strncmp(long_option[option_index].name, "stats", MAX_LONG_OPT_SZ)) { + 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; + } else { + enable_stats = ret; + } + } + + /* Set character device basename. */ + if (!strncmp(long_option[option_index].name, "dev-basename", MAX_LONG_OPT_SZ)) { + 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); + us_vhost_usage(prgname); + return -1; + } + } + + /* Enable/disable rx/tx zero copy. */ + if (!strncmp(long_option[option_index].name, + "zero-copy", MAX_LONG_OPT_SZ)) { + ret = parse_num_opt(optarg, 1); + if (ret == -1) { + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument" + " for zero-copy [0|1]\n"); + us_vhost_usage(prgname); + return -1; + } else + zero_copy = ret; + } + + /* Specify the descriptor number on RX. */ + if (!strncmp(long_option[option_index].name, + "rx-desc-num", MAX_LONG_OPT_SZ)) { + ret = parse_num_opt(optarg, MAX_RING_DESC); + if ((ret == -1) || (!POWEROF2(ret))) { + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument for rx-desc-num[0-N]," + "power of 2 required.\n"); + us_vhost_usage(prgname); + return -1; + } else { + num_rx_descriptor = ret; + } + } + + /* Specify the descriptor number on TX. */ + if (!strncmp(long_option[option_index].name, + "tx-desc-num", MAX_LONG_OPT_SZ)) { + ret = parse_num_opt(optarg, MAX_RING_DESC); + if ((ret == -1) || (!POWEROF2(ret))) { + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument for tx-desc-num [0-N]," + "power of 2 required.\n"); + us_vhost_usage(prgname); + return -1; + } else { + num_tx_descriptor = ret; + } + } + + 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++] = (uint8_t)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; + } + + if ((zero_copy == 1) && (vm2vm_mode == VM2VM_SOFTWARE)) { + RTE_LOG(INFO, VHOST_PORT, + "Vhost zero copy doesn't support software vm2vm," + "please specify 'vm2vm 2' to use hardware vm2vm.\n"); + return -1; + } + + if ((zero_copy == 1) && (vmdq_conf_default.rxmode.jumbo_frame == 1)) { + RTE_LOG(INFO, VHOST_PORT, + "Vhost zero copy doesn't support jumbo frame," + "please specify '--mergeable 0' to disable the " + "mergeable feature.\n"); + 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 (ports[portid] >= nb_ports) { + RTE_LOG(INFO, VHOST_PORT, "\nSpecified port ID(%u) exceeds max system port ID(%u)\n", + ports[portid], (nb_ports - 1)); + ports[portid] = INVALID_PORT_ID; + valid_num_ports--; + } + } + return valid_num_ports; +} + +/* + * Macro to print out packet contents. Wrapped in debug define so that the + * data path is not effected when debug is disabled. + */ +#ifdef DEBUG +#define PRINT_PACKET(device, addr, size, header) do { \ + char *pkt_addr = (char*)(addr); \ + unsigned int index; \ + char packet[MAX_PRINT_BUFF]; \ + \ + if ((header)) \ + snprintf(packet, MAX_PRINT_BUFF, "(%"PRIu64") Header size %d: ", (device->device_fh), (size)); \ + else \ + snprintf(packet, MAX_PRINT_BUFF, "(%"PRIu64") Packet size %d: ", (device->device_fh), (size)); \ + for (index = 0; index < (size); index++) { \ + snprintf(packet + strnlen(packet, MAX_PRINT_BUFF), MAX_PRINT_BUFF - strnlen(packet, MAX_PRINT_BUFF), \ + "%02hhx ", pkt_addr[index]); \ + } \ + snprintf(packet + strnlen(packet, MAX_PRINT_BUFF), MAX_PRINT_BUFF - strnlen(packet, MAX_PRINT_BUFF), "\n"); \ + \ + LOG_DEBUG(VHOST_DATA, "%s", packet); \ +} while(0) +#else +#define PRINT_PACKET(device, addr, size, header) do{} while(0) +#endif + +/* + * Function to convert guest physical addresses to vhost physical addresses. + * This is used to convert virtio buffer addresses. + */ +static inline uint64_t __attribute__((always_inline)) +gpa_to_hpa(struct vhost_dev *vdev, uint64_t guest_pa, + uint32_t buf_len, hpa_type *addr_type) +{ + struct virtio_memory_regions_hpa *region; + uint32_t regionidx; + uint64_t vhost_pa = 0; + + *addr_type = PHYS_ADDR_INVALID; + + for (regionidx = 0; regionidx < vdev->nregions_hpa; regionidx++) { + region = &vdev->regions_hpa[regionidx]; + if ((guest_pa >= region->guest_phys_address) && + (guest_pa <= region->guest_phys_address_end)) { + vhost_pa = region->host_phys_addr_offset + guest_pa; + if (likely((guest_pa + buf_len - 1) + <= region->guest_phys_address_end)) + *addr_type = PHYS_ADDR_CONTINUOUS; + else + *addr_type = PHYS_ADDR_CROSS_SUBREG; + break; + } + } + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") GPA %p| HPA %p\n", + vdev->dev->device_fh, (void *)(uintptr_t)guest_pa, + (void *)(uintptr_t)vhost_pa); + + return vhost_pa; +} + +/* + * Compares a packet destination MAC address to a device MAC address. + */ +static inline int __attribute__((always_inline)) +ether_addr_cmp(struct ether_addr *ea, struct ether_addr *eb) +{ + return ((*(uint64_t *)ea ^ *(uint64_t *)eb) & MAC_ADDR_CMP) == 0; +} + +/* + * 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 ether_hdr *pkt_hdr; + struct virtio_net_data_ll *dev_ll; + struct virtio_net *dev = vdev->dev; + int i, ret; + + /* Learn MAC address of guest device from packet */ + pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + + dev_ll = ll_root_used; + + while (dev_ll != NULL) { + if (ether_addr_cmp(&(pkt_hdr->s_addr), &dev_ll->vdev->mac_address)) { + RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") WARNING: This device is using an existing MAC address and has not been registered.\n", dev->device_fh); + return -1; + } + dev_ll = dev_ll->next; + } + + for (i = 0; i < ETHER_ADDR_LEN; i++) + vdev->mac_address.addr_bytes[i] = pkt_hdr->s_addr.addr_bytes[i]; + + /* vlan_tag currently uses the device_id. */ + vdev->vlan_tag = vlan_tags[dev->device_fh]; + + /* Print out VMDQ registration info. */ + RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") MAC_ADDRESS %02x:%02x:%02x:%02x:%02x:%02x and VLAN_TAG %d registered\n", + dev->device_fh, + vdev->mac_address.addr_bytes[0], vdev->mac_address.addr_bytes[1], + vdev->mac_address.addr_bytes[2], vdev->mac_address.addr_bytes[3], + vdev->mac_address.addr_bytes[4], vdev->mac_address.addr_bytes[5], + vdev->vlan_tag); + + /* Register the MAC address. */ + ret = rte_eth_dev_mac_addr_add(ports[0], &vdev->mac_address, + (uint32_t)dev->device_fh + vmdq_pool_base); + if (ret) + RTE_LOG(ERR, VHOST_DATA, "(%"PRIu64") Failed to add device MAC address to VMDQ\n", + dev->device_fh); + + /* Enable stripping of the vlan tag as we handle routing. */ + if (vlan_strip) + rte_eth_dev_set_vlan_strip_on_queue(ports[0], + (uint16_t)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; + } +} + +/* + * 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 inline int __attribute__((always_inline)) +virtio_tx_local(struct vhost_dev *vdev, struct rte_mbuf *m) +{ + struct virtio_net_data_ll *dev_ll; + struct ether_hdr *pkt_hdr; + uint64_t ret = 0; + struct virtio_net *dev = vdev->dev; + struct virtio_net *tdev; /* destination virito device */ + + pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + + /*get the used devices list*/ + dev_ll = ll_root_used; + + while (dev_ll != NULL) { + if ((dev_ll->vdev->ready == DEVICE_RX) && ether_addr_cmp(&(pkt_hdr->d_addr), + &dev_ll->vdev->mac_address)) { + + /* Drop the packet if the TX packet is destined for the TX device. */ + if (dev_ll->vdev->dev->device_fh == dev->device_fh) { + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: Source and destination MAC addresses are the same. Dropping packet.\n", + dev->device_fh); + return 0; + } + tdev = dev_ll->vdev->dev; + + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is local\n", tdev->device_fh); + + if (unlikely(dev_ll->vdev->remove)) { + /*drop the packet if the device is marked for removal*/ + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Device is marked for removal\n", tdev->device_fh); + } else { + /*send the packet to the local virtio device*/ + ret = rte_vhost_enqueue_burst(tdev, VIRTIO_RXQ, &m, 1); + if (enable_stats) { + rte_atomic64_add( + &dev_statistics[tdev->device_fh].rx_total_atomic, + 1); + rte_atomic64_add( + &dev_statistics[tdev->device_fh].rx_atomic, + ret); + dev_statistics[dev->device_fh].tx_total++; + dev_statistics[dev->device_fh].tx += ret; + } + } + + return 0; + } + dev_ll = dev_ll->next; + } + + return -1; +} + +/* + * Check if the destination MAC of a packet is one local VM, + * and get its vlan tag, and offset if it is. + */ +static inline int __attribute__((always_inline)) +find_local_dest(struct virtio_net *dev, struct rte_mbuf *m, + uint32_t *offset, uint16_t *vlan_tag) +{ + struct virtio_net_data_ll *dev_ll = ll_root_used; + struct ether_hdr *pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + + while (dev_ll != NULL) { + if ((dev_ll->vdev->ready == DEVICE_RX) + && ether_addr_cmp(&(pkt_hdr->d_addr), + &dev_ll->vdev->mac_address)) { + /* + * Drop the packet if the TX packet is + * destined for the TX device. + */ + if (dev_ll->vdev->dev->device_fh == dev->device_fh) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") TX: Source and destination" + " MAC addresses are the same. Dropping " + "packet.\n", + dev_ll->vdev->dev->device_fh); + 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 = VLAN_HLEN; + *vlan_tag = + (uint16_t) + vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh]; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") TX: pkt to local VM device id:" + "(%"PRIu64") vlan tag: %d.\n", + dev->device_fh, dev_ll->vdev->dev->device_fh, + (int)*vlan_tag); + + break; + } + dev_ll = dev_ll->next; + } + return 0; +} + +static uint16_t +get_psd_sum(void *l3_hdr, uint64_t ol_flags) +{ + if (ol_flags & PKT_TX_IPV4) + return rte_ipv4_phdr_cksum(l3_hdr, ol_flags); + else /* assume ethertype == ETHER_TYPE_IPv6 */ + return rte_ipv6_phdr_cksum(l3_hdr, ol_flags); +} + +static void virtio_tx_offload(struct rte_mbuf *m) +{ + void *l3_hdr; + struct ipv4_hdr *ipv4_hdr = NULL; + struct tcp_hdr *tcp_hdr = NULL; + struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + + l3_hdr = (char *)eth_hdr + m->l2_len; + + if (m->ol_flags & PKT_TX_IPV4) { + ipv4_hdr = l3_hdr; + ipv4_hdr->hdr_checksum = 0; + m->ol_flags |= PKT_TX_IP_CKSUM; + } + + tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + m->l3_len); + tcp_hdr->cksum = get_psd_sum(l3_hdr, m->ol_flags); +} + +/* + * 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, uint16_t vlan_tag) +{ + struct mbuf_table *tx_q; + struct rte_mbuf **m_table; + unsigned len, ret, offset = 0; + const uint16_t lcore_id = rte_lcore_id(); + struct virtio_net *dev = vdev->dev; + struct ether_hdr *nh; + + /*check if destination is local VM*/ + if ((vm2vm_mode == VM2VM_SOFTWARE) && (virtio_tx_local(vdev, m) == 0)) { + rte_pktmbuf_free(m); + return; + } + + if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) { + if (unlikely(find_local_dest(dev, m, &offset, &vlan_tag) != 0)) { + rte_pktmbuf_free(m); + return; + } + } + + 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; + + nh = rte_pktmbuf_mtod(m, struct ether_hdr *); + if (unlikely(nh->ether_type == rte_cpu_to_be_16(ETHER_TYPE_VLAN))) { + /* Guest has inserted the vlan tag. */ + struct vlan_hdr *vh = (struct 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 |= PKT_TX_VLAN_PKT; + + /* + * 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 & PKT_TX_TCP_SEG) + virtio_tx_offload(m); + + 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; + ret = rte_eth_tx_burst(ports[0], (uint16_t)tx_q->txq_id, m_table, (uint16_t) len); + /* 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(__attribute__((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 ret, i; + 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); + + /*Tx any packets in the queue*/ + ret = rte_eth_tx_burst(ports[0], (uint16_t)tx_q->txq_id, + (struct rte_mbuf **)tx_q->m_table, + (uint16_t)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) { + /*get virtio device ID*/ + vdev = dev_ll->vdev; + dev = vdev->dev; + + if (unlikely(vdev->remove)) { + dev_ll = dev_ll->next; + unlink_vmdq(vdev); + vdev->ready = DEVICE_SAFE_REMOVE; + continue; + } + if (likely(vdev->ready == DEVICE_RX)) { + /*Handle guest RX*/ + rx_count = rte_eth_rx_burst(ports[0], + vdev->vmdq_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; + } + } + ret_count = rte_vhost_enqueue_burst(dev, VIRTIO_RXQ, pkts_burst, rx_count); + if (enable_stats) { + rte_atomic64_add( + &dev_statistics[dev_ll->vdev->dev->device_fh].rx_total_atomic, + rx_count); + rte_atomic64_add( + &dev_statistics[dev_ll->vdev->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 and setup VMDQ */ + if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) { + if (vdev->remove || (link_vmdq(vdev, pkts_burst[0]) == -1)) { + while (tx_count) + rte_pktmbuf_free(pkts_burst[--tx_count]); + } + } + for (i = 0; i < tx_count; ++i) { + virtio_tx_route(vdev, pkts_burst[i], + vlan_tags[(uint16_t)dev->device_fh]); + } + } + + /*move to the next device in the list*/ + dev_ll = dev_ll->next; + } + } + + return 0; +} + +/* + * This function gets available ring number for zero copy rx. + * Only one thread will call this funciton for a paticular virtio device, + * so, it is designed as non-thread-safe function. + */ +static inline uint32_t __attribute__((always_inline)) +get_available_ring_num_zcp(struct virtio_net *dev) +{ + struct vhost_virtqueue *vq = dev->virtqueue[VIRTIO_RXQ]; + uint16_t avail_idx; + + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + return (uint32_t)(avail_idx - vq->last_used_idx_res); +} + +/* + * This function gets available ring index for zero copy rx, + * it will retry 'burst_rx_retry_num' times till it get enough ring index. + * Only one thread will call this funciton for a paticular virtio device, + * so, it is designed as non-thread-safe function. + */ +static inline uint32_t __attribute__((always_inline)) +get_available_ring_index_zcp(struct virtio_net *dev, + uint16_t *res_base_idx, uint32_t count) +{ + struct vhost_virtqueue *vq = dev->virtqueue[VIRTIO_RXQ]; + uint16_t avail_idx; + uint32_t retry = 0; + uint16_t free_entries; + + *res_base_idx = vq->last_used_idx_res; + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + free_entries = (avail_idx - *res_base_idx); + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") in get_available_ring_index_zcp: " + "avail idx: %d, " + "res base idx:%d, free entries:%d\n", + dev->device_fh, avail_idx, *res_base_idx, + free_entries); + + /* + * If retry is enabled and the queue is full then we wait + * and retry to avoid packet loss. + */ + if (enable_retry && unlikely(count > free_entries)) { + for (retry = 0; retry < burst_rx_retry_num; retry++) { + rte_delay_us(burst_rx_delay_time); + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + free_entries = (avail_idx - *res_base_idx); + if (count <= free_entries) + break; + } + } + + /*check that we have enough buffers*/ + if (unlikely(count > free_entries)) + count = free_entries; + + if (unlikely(count == 0)) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") Fail in get_available_ring_index_zcp: " + "avail idx: %d, res base idx:%d, free entries:%d\n", + dev->device_fh, avail_idx, + *res_base_idx, free_entries); + return 0; + } + + vq->last_used_idx_res = *res_base_idx + count; + + return count; +} + +/* + * This function put descriptor back to used list. + */ +static inline void __attribute__((always_inline)) +put_desc_to_used_list_zcp(struct vhost_virtqueue *vq, uint16_t desc_idx) +{ + uint16_t res_cur_idx = vq->last_used_idx; + vq->used->ring[res_cur_idx & (vq->size - 1)].id = (uint32_t)desc_idx; + vq->used->ring[res_cur_idx & (vq->size - 1)].len = 0; + rte_compiler_barrier(); + *(volatile uint16_t *)&vq->used->idx += 1; + vq->last_used_idx += 1; + + /* Kick the guest if necessary. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write(vq->callfd, (eventfd_t)1); +} + +/* + * This function get available descriptor from vitio vring and un-attached mbuf + * from vpool->ring, and then attach them together. It needs adjust the offset + * for buff_addr and phys_addr accroding to PMD implementation, otherwise the + * frame data may be put to wrong location in mbuf. + */ +static inline void __attribute__((always_inline)) +attach_rxmbuf_zcp(struct virtio_net *dev) +{ + uint16_t res_base_idx, desc_idx; + uint64_t buff_addr, phys_addr; + struct vhost_virtqueue *vq; + struct vring_desc *desc; + void *obj = NULL; + struct rte_mbuf *mbuf; + struct vpool *vpool; + hpa_type addr_type; + struct vhost_dev *vdev = (struct vhost_dev *)dev->priv; + + vpool = &vpool_array[vdev->vmdq_rx_q]; + vq = dev->virtqueue[VIRTIO_RXQ]; + + do { + if (unlikely(get_available_ring_index_zcp(vdev->dev, &res_base_idx, + 1) != 1)) + return; + desc_idx = vq->avail->ring[(res_base_idx) & (vq->size - 1)]; + + desc = &vq->desc[desc_idx]; + if (desc->flags & VRING_DESC_F_NEXT) { + desc = &vq->desc[desc->next]; + buff_addr = gpa_to_vva(dev, desc->addr); + phys_addr = gpa_to_hpa(vdev, desc->addr, desc->len, + &addr_type); + } else { + buff_addr = gpa_to_vva(dev, + desc->addr + vq->vhost_hlen); + phys_addr = gpa_to_hpa(vdev, + desc->addr + vq->vhost_hlen, + desc->len, &addr_type); + } + + if (unlikely(addr_type == PHYS_ADDR_INVALID)) { + RTE_LOG(ERR, VHOST_DATA, "(%"PRIu64") Invalid frame buffer" + " address found when attaching RX frame buffer" + " address!\n", dev->device_fh); + put_desc_to_used_list_zcp(vq, desc_idx); + continue; + } + + /* + * Check if the frame buffer address from guest crosses + * sub-region or not. + */ + if (unlikely(addr_type == PHYS_ADDR_CROSS_SUBREG)) { + RTE_LOG(ERR, VHOST_DATA, + "(%"PRIu64") Frame buffer address cross " + "sub-regioin found when attaching RX frame " + "buffer address!\n", + dev->device_fh); + put_desc_to_used_list_zcp(vq, desc_idx); + continue; + } + } while (unlikely(phys_addr == 0)); + + rte_ring_sc_dequeue(vpool->ring, &obj); + mbuf = obj; + if (unlikely(mbuf == NULL)) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in attach_rxmbuf_zcp: " + "ring_sc_dequeue fail.\n", + dev->device_fh); + put_desc_to_used_list_zcp(vq, desc_idx); + return; + } + + if (unlikely(vpool->buf_size > desc->len)) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in attach_rxmbuf_zcp: frame buffer " + "length(%d) of descriptor idx: %d less than room " + "size required: %d\n", + dev->device_fh, desc->len, desc_idx, vpool->buf_size); + put_desc_to_used_list_zcp(vq, desc_idx); + rte_ring_sp_enqueue(vpool->ring, obj); + return; + } + + mbuf->buf_addr = (void *)(uintptr_t)(buff_addr - RTE_PKTMBUF_HEADROOM); + mbuf->data_off = RTE_PKTMBUF_HEADROOM; + mbuf->buf_physaddr = phys_addr - RTE_PKTMBUF_HEADROOM; + mbuf->data_len = desc->len; + MBUF_HEADROOM_UINT32(mbuf) = (uint32_t)desc_idx; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in attach_rxmbuf_zcp: res base idx:%d, " + "descriptor idx:%d\n", + dev->device_fh, res_base_idx, desc_idx); + + __rte_mbuf_raw_free(mbuf); + + return; +} + +/* + * Detach an attched packet mbuf - + * - restore original mbuf address and length values. + * - reset pktmbuf data and data_len to their default values. + * All other fields of the given packet mbuf will be left intact. + * + * @param m + * The attached packet mbuf. + */ +static inline void pktmbuf_detach_zcp(struct rte_mbuf *m) +{ + const struct rte_mempool *mp = m->pool; + void *buf = rte_mbuf_to_baddr(m); + uint32_t buf_ofs; + uint32_t buf_len = mp->elt_size - sizeof(*m); + m->buf_physaddr = rte_mempool_virt2phy(mp, m) + sizeof(*m); + + m->buf_addr = buf; + m->buf_len = (uint16_t)buf_len; + + buf_ofs = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ? + RTE_PKTMBUF_HEADROOM : m->buf_len; + m->data_off = buf_ofs; + + m->data_len = 0; +} + +/* + * This function is called after packets have been transimited. It fetchs mbuf + * from vpool->pool, detached it and put into vpool->ring. It also update the + * used index and kick the guest if necessary. + */ +static inline uint32_t __attribute__((always_inline)) +txmbuf_clean_zcp(struct virtio_net *dev, struct vpool *vpool) +{ + struct rte_mbuf *mbuf; + struct vhost_virtqueue *vq = dev->virtqueue[VIRTIO_TXQ]; + uint32_t used_idx = vq->last_used_idx & (vq->size - 1); + uint32_t index = 0; + uint32_t mbuf_count = rte_mempool_count(vpool->pool); + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: mbuf count in mempool before " + "clean is: %d\n", + dev->device_fh, mbuf_count); + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: mbuf count in ring before " + "clean is : %d\n", + dev->device_fh, rte_ring_count(vpool->ring)); + + for (index = 0; index < mbuf_count; index++) { + mbuf = __rte_mbuf_raw_alloc(vpool->pool); + if (likely(MBUF_EXT_MEM(mbuf))) + pktmbuf_detach_zcp(mbuf); + rte_ring_sp_enqueue(vpool->ring, mbuf); + + /* Update used index buffer information. */ + vq->used->ring[used_idx].id = MBUF_HEADROOM_UINT32(mbuf); + vq->used->ring[used_idx].len = 0; + + used_idx = (used_idx + 1) & (vq->size - 1); + } + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: mbuf count in mempool after " + "clean is: %d\n", + dev->device_fh, rte_mempool_count(vpool->pool)); + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: mbuf count in ring after " + "clean is : %d\n", + dev->device_fh, rte_ring_count(vpool->ring)); + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: before updated " + "vq->last_used_idx:%d\n", + dev->device_fh, vq->last_used_idx); + + vq->last_used_idx += mbuf_count; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in txmbuf_clean_zcp: after updated " + "vq->last_used_idx:%d\n", + dev->device_fh, vq->last_used_idx); + + rte_compiler_barrier(); + + *(volatile uint16_t *)&vq->used->idx += mbuf_count; + + /* Kick guest if required. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write(vq->callfd, (eventfd_t)1); + + return 0; +} + +/* + * This function is called when a virtio device is destroy. + * It fetchs mbuf from vpool->pool, and detached it, and put into vpool->ring. + */ +static void mbuf_destroy_zcp(struct vpool *vpool) +{ + struct rte_mbuf *mbuf = NULL; + uint32_t index, mbuf_count = rte_mempool_count(vpool->pool); + + LOG_DEBUG(VHOST_CONFIG, + "in mbuf_destroy_zcp: mbuf count in mempool before " + "mbuf_destroy_zcp is: %d\n", + mbuf_count); + LOG_DEBUG(VHOST_CONFIG, + "in mbuf_destroy_zcp: mbuf count in ring before " + "mbuf_destroy_zcp is : %d\n", + rte_ring_count(vpool->ring)); + + for (index = 0; index < mbuf_count; index++) { + mbuf = __rte_mbuf_raw_alloc(vpool->pool); + if (likely(mbuf != NULL)) { + if (likely(MBUF_EXT_MEM(mbuf))) + pktmbuf_detach_zcp(mbuf); + rte_ring_sp_enqueue(vpool->ring, (void *)mbuf); + } + } + + LOG_DEBUG(VHOST_CONFIG, + "in mbuf_destroy_zcp: mbuf count in mempool after " + "mbuf_destroy_zcp is: %d\n", + rte_mempool_count(vpool->pool)); + LOG_DEBUG(VHOST_CONFIG, + "in mbuf_destroy_zcp: mbuf count in ring after " + "mbuf_destroy_zcp is : %d\n", + rte_ring_count(vpool->ring)); +} + +/* + * This function update the use flag and counter. + */ +static inline uint32_t __attribute__((always_inline)) +virtio_dev_rx_zcp(struct virtio_net *dev, struct rte_mbuf **pkts, + uint32_t count) +{ + struct vhost_virtqueue *vq; + struct vring_desc *desc; + struct rte_mbuf *buff; + /* The virtio_hdr is initialised to 0. */ + struct virtio_net_hdr_mrg_rxbuf virtio_hdr + = {{0, 0, 0, 0, 0, 0}, 0}; + uint64_t buff_hdr_addr = 0; + uint32_t head[MAX_PKT_BURST], packet_len = 0; + uint32_t head_idx, packet_success = 0; + uint16_t res_cur_idx; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_rx()\n", dev->device_fh); + + if (count == 0) + return 0; + + vq = dev->virtqueue[VIRTIO_RXQ]; + count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count; + + res_cur_idx = vq->last_used_idx; + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| End Index %d\n", + dev->device_fh, res_cur_idx, res_cur_idx + count); + + /* Retrieve all of the head indexes first to avoid caching issues. */ + for (head_idx = 0; head_idx < count; head_idx++) + head[head_idx] = MBUF_HEADROOM_UINT32(pkts[head_idx]); + + /*Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success]]); + + while (packet_success != count) { + /* Get descriptor from available ring */ + desc = &vq->desc[head[packet_success]]; + + buff = pkts[packet_success]; + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in dev_rx_zcp: update the used idx for " + "pkt[%d] descriptor idx: %d\n", + dev->device_fh, packet_success, + MBUF_HEADROOM_UINT32(buff)); + + PRINT_PACKET(dev, + (uintptr_t)(((uint64_t)(uintptr_t)buff->buf_addr) + + RTE_PKTMBUF_HEADROOM), + rte_pktmbuf_data_len(buff), 0); + + /* Buffer address translation for virtio header. */ + buff_hdr_addr = gpa_to_vva(dev, desc->addr); + packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen; + + /* + * If the descriptors are chained the header and data are + * placed in separate buffers. + */ + if (desc->flags & VRING_DESC_F_NEXT) { + desc->len = vq->vhost_hlen; + desc = &vq->desc[desc->next]; + desc->len = rte_pktmbuf_data_len(buff); + } else { + desc->len = packet_len; + } + + /* Update used ring with desc information */ + vq->used->ring[res_cur_idx & (vq->size - 1)].id + = head[packet_success]; + vq->used->ring[res_cur_idx & (vq->size - 1)].len + = packet_len; + res_cur_idx++; + packet_success++; + + /* A header is required per buffer. */ + rte_memcpy((void *)(uintptr_t)buff_hdr_addr, + (const void *)&virtio_hdr, vq->vhost_hlen); + + PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1); + + if (likely(packet_success < count)) { + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success]]); + } + } + + rte_compiler_barrier(); + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in dev_rx_zcp: before update used idx: " + "vq.last_used_idx: %d, vq->used->idx: %d\n", + dev->device_fh, vq->last_used_idx, vq->used->idx); + + *(volatile uint16_t *)&vq->used->idx += count; + vq->last_used_idx += count; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in dev_rx_zcp: after update used idx: " + "vq.last_used_idx: %d, vq->used->idx: %d\n", + dev->device_fh, vq->last_used_idx, vq->used->idx); + + /* Kick the guest if necessary. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write(vq->callfd, (eventfd_t)1); + + return count; +} + +/* + * 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_zcp(struct virtio_net *dev, struct rte_mbuf *m, + uint32_t desc_idx, uint8_t need_copy) +{ + struct mbuf_table *tx_q; + struct rte_mbuf **m_table; + void *obj = NULL; + struct rte_mbuf *mbuf; + unsigned len, ret, offset = 0; + struct vpool *vpool; + uint16_t vlan_tag = (uint16_t)vlan_tags[(uint16_t)dev->device_fh]; + uint16_t vmdq_rx_q = ((struct vhost_dev *)dev->priv)->vmdq_rx_q; + + /*Add packet to the port tx queue*/ + tx_q = &tx_queue_zcp[vmdq_rx_q]; + len = tx_q->len; + + /* Allocate an mbuf and populate the structure. */ + vpool = &vpool_array[MAX_QUEUES + vmdq_rx_q]; + rte_ring_sc_dequeue(vpool->ring, &obj); + mbuf = obj; + if (unlikely(mbuf == NULL)) { + struct vhost_virtqueue *vq = dev->virtqueue[VIRTIO_TXQ]; + RTE_LOG(ERR, VHOST_DATA, + "(%"PRIu64") Failed to allocate memory for mbuf.\n", + dev->device_fh); + put_desc_to_used_list_zcp(vq, desc_idx); + return; + } + + if (vm2vm_mode == VM2VM_HARDWARE) { + /* Avoid using a vlan tag from any vm for external pkt, such as + * vlan_tags[dev->device_fh], oterwise, it conflicts when pool + * selection, MAC address determines it as an external pkt + * which should go to network, while vlan tag determine it as + * a vm2vm pkt should forward to another vm. Hardware confuse + * such a ambiguous situation, so pkt will lost. + */ + vlan_tag = external_pkt_default_vlan_tag; + if (find_local_dest(dev, m, &offset, &vlan_tag) != 0) { + MBUF_HEADROOM_UINT32(mbuf) = (uint32_t)desc_idx; + __rte_mbuf_raw_free(mbuf); + return; + } + } + + mbuf->nb_segs = m->nb_segs; + mbuf->next = m->next; + mbuf->data_len = m->data_len + offset; + mbuf->pkt_len = mbuf->data_len; + if (unlikely(need_copy)) { + /* Copy the packet contents to the mbuf. */ + rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), + rte_pktmbuf_mtod(m, void *), + m->data_len); + } else { + mbuf->data_off = m->data_off; + mbuf->buf_physaddr = m->buf_physaddr; + mbuf->buf_addr = m->buf_addr; + } + mbuf->ol_flags |= PKT_TX_VLAN_PKT; + mbuf->vlan_tci = vlan_tag; + mbuf->l2_len = sizeof(struct ether_hdr); + mbuf->l3_len = sizeof(struct ipv4_hdr); + MBUF_HEADROOM_UINT32(mbuf) = (uint32_t)desc_idx; + + tx_q->m_table[len] = mbuf; + len++; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") in tx_route_zcp: pkt: nb_seg: %d, next:%s\n", + dev->device_fh, + mbuf->nb_segs, + (mbuf->next == NULL) ? "null" : "non-null"); + + 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; + ret = rte_eth_tx_burst(ports[0], + (uint16_t)tx_q->txq_id, m_table, (uint16_t) len); + + /* + * 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; + txmbuf_clean_zcp(dev, vpool); + } + + tx_q->len = len; + + return; +} + +/* + * This function TX all available packets in virtio TX queue for one + * virtio-net device. If it is first packet, it learns MAC address and + * setup VMDQ. + */ +static inline void __attribute__((always_inline)) +virtio_dev_tx_zcp(struct virtio_net *dev) +{ + struct rte_mbuf m; + struct vhost_virtqueue *vq; + struct vring_desc *desc; + uint64_t buff_addr = 0, phys_addr; + uint32_t head[MAX_PKT_BURST]; + uint32_t i; + uint16_t free_entries, packet_success = 0; + uint16_t avail_idx; + uint8_t need_copy = 0; + hpa_type addr_type; + struct vhost_dev *vdev = (struct vhost_dev *)dev->priv; + + vq = dev->virtqueue[VIRTIO_TXQ]; + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + + /* If there are no available buffers then return. */ + if (vq->last_used_idx_res == avail_idx) + return; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_tx()\n", dev->device_fh); + + /* Prefetch available ring to retrieve head indexes. */ + rte_prefetch0(&vq->avail->ring[vq->last_used_idx_res & (vq->size - 1)]); + + /* Get the number of free entries in the ring */ + free_entries = (avail_idx - vq->last_used_idx_res); + + /* Limit to MAX_PKT_BURST. */ + free_entries + = (free_entries > MAX_PKT_BURST) ? MAX_PKT_BURST : free_entries; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n", + dev->device_fh, free_entries); + + /* Retrieve all of the head indexes first to avoid caching issues. */ + for (i = 0; i < free_entries; i++) + head[i] + = vq->avail->ring[(vq->last_used_idx_res + i) + & (vq->size - 1)]; + + vq->last_used_idx_res += free_entries; + + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success]]); + rte_prefetch0(&vq->used->ring[vq->last_used_idx & (vq->size - 1)]); + + while (packet_success < free_entries) { + desc = &vq->desc[head[packet_success]]; + + /* Discard first buffer as it is the virtio header */ + desc = &vq->desc[desc->next]; + + /* Buffer address translation. */ + buff_addr = gpa_to_vva(dev, desc->addr); + /* Need check extra VLAN_HLEN size for inserting VLAN tag */ + phys_addr = gpa_to_hpa(vdev, desc->addr, desc->len + VLAN_HLEN, + &addr_type); + + if (likely(packet_success < (free_entries - 1))) + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success + 1]]); + + if (unlikely(addr_type == PHYS_ADDR_INVALID)) { + RTE_LOG(ERR, VHOST_DATA, + "(%"PRIu64") Invalid frame buffer address found" + "when TX packets!\n", + dev->device_fh); + packet_success++; + continue; + } + + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)buff_addr); + + /* + * Setup dummy mbuf. This is copied to a real mbuf if + * transmitted out the physical port. + */ + m.data_len = desc->len; + m.nb_segs = 1; + m.next = NULL; + m.data_off = 0; + m.buf_addr = (void *)(uintptr_t)buff_addr; + m.buf_physaddr = phys_addr; + + /* + * Check if the frame buffer address from guest crosses + * sub-region or not. + */ + if (unlikely(addr_type == PHYS_ADDR_CROSS_SUBREG)) { + RTE_LOG(ERR, VHOST_DATA, + "(%"PRIu64") Frame buffer address cross " + "sub-regioin found when attaching TX frame " + "buffer address!\n", + dev->device_fh); + need_copy = 1; + } else + need_copy = 0; + + PRINT_PACKET(dev, (uintptr_t)buff_addr, desc->len, 0); + + /* + * If this is the first received packet we need to learn + * the MAC and setup VMDQ + */ + if (unlikely(vdev->ready == DEVICE_MAC_LEARNING)) { + if (vdev->remove || (link_vmdq(vdev, &m) == -1)) { + /* + * Discard frame if device is scheduled for + * removal or a duplicate MAC address is found. + */ + packet_success += free_entries; + vq->last_used_idx += packet_success; + break; + } + } + + virtio_tx_route_zcp(dev, &m, head[packet_success], need_copy); + packet_success++; + } +} + +/* + * 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_zcp(__attribute__((unused)) void *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 ret; + const uint16_t lcore_id = rte_lcore_id(); + uint16_t count_in_ring, rx_count = 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; + + while (1) { + cur_tsc = rte_rdtsc(); + + /* TX burst queue drain */ + diff_tsc = cur_tsc - prev_tsc; + if (unlikely(diff_tsc > drain_tsc)) { + /* + * Get mbuf from vpool.pool and detach mbuf and + * put back into vpool.ring. + */ + dev_ll = lcore_ll->ll_root_used; + while ((dev_ll != NULL) && (dev_ll->vdev != NULL)) { + /* Get virtio device ID */ + vdev = dev_ll->vdev; + dev = vdev->dev; + + if (likely(!vdev->remove)) { + tx_q = &tx_queue_zcp[(uint16_t)vdev->vmdq_rx_q]; + if (tx_q->len) { + LOG_DEBUG(VHOST_DATA, + "TX queue drained after timeout" + " with burst size %u\n", + tx_q->len); + + /* + * Tx any packets in the queue + */ + ret = rte_eth_tx_burst( + ports[0], + (uint16_t)tx_q->txq_id, + (struct rte_mbuf **) + tx_q->m_table, + (uint16_t)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; + + txmbuf_clean_zcp(dev, + &vpool_array[MAX_QUEUES+vdev->vmdq_rx_q]); + } + } + dev_ll = dev_ll->next; + } + 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) && (dev_ll->vdev != NULL)) { + vdev = dev_ll->vdev; + dev = vdev->dev; + if (unlikely(vdev->remove)) { + dev_ll = dev_ll->next; + unlink_vmdq(vdev); + vdev->ready = DEVICE_SAFE_REMOVE; + continue; + } + + if (likely(vdev->ready == DEVICE_RX)) { + uint32_t index = vdev->vmdq_rx_q; + uint16_t i; + count_in_ring + = rte_ring_count(vpool_array[index].ring); + uint16_t free_entries + = (uint16_t)get_available_ring_num_zcp(dev); + + /* + * Attach all mbufs in vpool.ring and put back + * into vpool.pool. + */ + for (i = 0; + i < RTE_MIN(free_entries, + RTE_MIN(count_in_ring, MAX_PKT_BURST)); + i++) + attach_rxmbuf_zcp(dev); + + /* Handle guest RX */ + rx_count = rte_eth_rx_burst(ports[0], + vdev->vmdq_rx_q, pkts_burst, + MAX_PKT_BURST); + + if (rx_count) { + ret_count = virtio_dev_rx_zcp(dev, + pkts_burst, rx_count); + if (enable_stats) { + dev_statistics[dev->device_fh].rx_total + += rx_count; + dev_statistics[dev->device_fh].rx + += ret_count; + } + while (likely(rx_count)) { + rx_count--; + pktmbuf_detach_zcp( + pkts_burst[rx_count]); + rte_ring_sp_enqueue( + vpool_array[index].ring, + (void *)pkts_burst[rx_count]); + } + } + } + + if (likely(!vdev->remove)) + /* Handle guest TX */ + virtio_dev_tx_zcp(dev); + + /* 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 (num_devices % num_switching_cores) + lcore_info[lcore].lcore_ll->ll_root_free = alloc_data_ll((num_devices / num_switching_cores) + 1); + else + lcore_info[lcore].lcore_ll->ll_root_free = alloc_data_ll(num_devices / num_switching_cores); + } + + /* Allocate devices up to a maximum of MAX_DEVICES. */ + ll_root_free = alloc_data_ll(MIN((num_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); + + if (zero_copy) { + struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q]; + + /* Stop the RX queue. */ + if (rte_eth_dev_rx_queue_stop(ports[0], vdev->vmdq_rx_q) != 0) { + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") In destroy_device: Failed to stop " + "rx queue:%d\n", + dev->device_fh, + vdev->vmdq_rx_q); + } + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") in destroy_device: Start put mbuf in " + "mempool back to ring for RX queue: %d\n", + dev->device_fh, vdev->vmdq_rx_q); + + mbuf_destroy_zcp(vpool); + + /* Stop the TX queue. */ + if (rte_eth_dev_tx_queue_stop(ports[0], vdev->vmdq_rx_q) != 0) { + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") In destroy_device: Failed to " + "stop tx queue:%d\n", + dev->device_fh, vdev->vmdq_rx_q); + } + + vpool = &vpool_array[vdev->vmdq_rx_q + MAX_QUEUES]; + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") destroy_device: Start put mbuf in mempool " + "back to ring for TX queue: %d, dev:(%"PRIu64")\n", + dev->device_fh, (vdev->vmdq_rx_q + MAX_QUEUES), + dev->device_fh); + + mbuf_destroy_zcp(vpool); + rte_free(vdev->regions_hpa); + } + rte_free(vdev); + +} + +/* + * Calculate the region count of physical continous regions for one particular + * region of whose vhost virtual address is continous. The particular region + * start from vva_start, with size of 'size' in argument. + */ +static uint32_t +check_hpa_regions(uint64_t vva_start, uint64_t size) +{ + uint32_t i, nregions = 0, page_size = getpagesize(); + uint64_t cur_phys_addr = 0, next_phys_addr = 0; + if (vva_start % page_size) { + LOG_DEBUG(VHOST_CONFIG, + "in check_countinous: vva start(%p) mod page_size(%d) " + "has remainder\n", + (void *)(uintptr_t)vva_start, page_size); + return 0; + } + if (size % page_size) { + LOG_DEBUG(VHOST_CONFIG, + "in check_countinous: " + "size((%"PRIu64")) mod page_size(%d) has remainder\n", + size, page_size); + return 0; + } + for (i = 0; i < size - page_size; i = i + page_size) { + cur_phys_addr + = rte_mem_virt2phy((void *)(uintptr_t)(vva_start + i)); + next_phys_addr = rte_mem_virt2phy( + (void *)(uintptr_t)(vva_start + i + page_size)); + if ((cur_phys_addr + page_size) != next_phys_addr) { + ++nregions; + LOG_DEBUG(VHOST_CONFIG, + "in check_continuous: hva addr:(%p) is not " + "continuous with hva addr:(%p), diff:%d\n", + (void *)(uintptr_t)(vva_start + (uint64_t)i), + (void *)(uintptr_t)(vva_start + (uint64_t)i + + page_size), page_size); + LOG_DEBUG(VHOST_CONFIG, + "in check_continuous: hpa addr:(%p) is not " + "continuous with hpa addr:(%p), " + "diff:(%"PRIu64")\n", + (void *)(uintptr_t)cur_phys_addr, + (void *)(uintptr_t)next_phys_addr, + (next_phys_addr-cur_phys_addr)); + } + } + return nregions; +} + +/* + * Divide each region whose vhost virtual address is continous into a few + * sub-regions, make sure the physical address within each sub-region are + * continous. And fill offset(to GPA) and size etc. information of each + * sub-region into regions_hpa. + */ +static uint32_t +fill_hpa_memory_regions(struct virtio_memory_regions_hpa *mem_region_hpa, struct virtio_memory *virtio_memory) +{ + uint32_t regionidx, regionidx_hpa = 0, i, k, page_size = getpagesize(); + uint64_t cur_phys_addr = 0, next_phys_addr = 0, vva_start; + + if (mem_region_hpa == NULL) + return 0; + + for (regionidx = 0; regionidx < virtio_memory->nregions; regionidx++) { + vva_start = virtio_memory->regions[regionidx].guest_phys_address + + virtio_memory->regions[regionidx].address_offset; + mem_region_hpa[regionidx_hpa].guest_phys_address + = virtio_memory->regions[regionidx].guest_phys_address; + mem_region_hpa[regionidx_hpa].host_phys_addr_offset = + rte_mem_virt2phy((void *)(uintptr_t)(vva_start)) - + mem_region_hpa[regionidx_hpa].guest_phys_address; + LOG_DEBUG(VHOST_CONFIG, + "in fill_hpa_regions: guest phys addr start[%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].guest_phys_address)); + LOG_DEBUG(VHOST_CONFIG, + "in fill_hpa_regions: host phys addr start[%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].host_phys_addr_offset)); + for (i = 0, k = 0; + i < virtio_memory->regions[regionidx].memory_size - + page_size; + i += page_size) { + cur_phys_addr = rte_mem_virt2phy( + (void *)(uintptr_t)(vva_start + i)); + next_phys_addr = rte_mem_virt2phy( + (void *)(uintptr_t)(vva_start + + i + page_size)); + if ((cur_phys_addr + page_size) != next_phys_addr) { + mem_region_hpa[regionidx_hpa].guest_phys_address_end = + mem_region_hpa[regionidx_hpa].guest_phys_address + + k + page_size; + mem_region_hpa[regionidx_hpa].memory_size + = k + page_size; + LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest " + "phys addr end [%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].guest_phys_address_end)); + LOG_DEBUG(VHOST_CONFIG, + "in fill_hpa_regions: guest phys addr " + "size [%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].memory_size)); + mem_region_hpa[regionidx_hpa + 1].guest_phys_address + = mem_region_hpa[regionidx_hpa].guest_phys_address_end; + ++regionidx_hpa; + mem_region_hpa[regionidx_hpa].host_phys_addr_offset = + next_phys_addr - + mem_region_hpa[regionidx_hpa].guest_phys_address; + LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest" + " phys addr start[%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].guest_phys_address)); + LOG_DEBUG(VHOST_CONFIG, + "in fill_hpa_regions: host phys addr " + "start[%d]:(%p)\n", + regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].host_phys_addr_offset)); + k = 0; + } else { + k += page_size; + } + } + mem_region_hpa[regionidx_hpa].guest_phys_address_end + = mem_region_hpa[regionidx_hpa].guest_phys_address + + k + page_size; + mem_region_hpa[regionidx_hpa].memory_size = k + page_size; + LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr end " + "[%d]:(%p)\n", regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].guest_phys_address_end)); + LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr size " + "[%d]:(%p)\n", regionidx_hpa, + (void *)(uintptr_t) + (mem_region_hpa[regionidx_hpa].memory_size)); + ++regionidx_hpa; + } + return regionidx_hpa; +} + +/* + * 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 = num_devices; + struct vhost_dev *vdev; + uint32_t regionidx; + + 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; + + if (zero_copy) { + vdev->nregions_hpa = dev->mem->nregions; + for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) { + vdev->nregions_hpa + += check_hpa_regions( + dev->mem->regions[regionidx].guest_phys_address + + dev->mem->regions[regionidx].address_offset, + dev->mem->regions[regionidx].memory_size); + + } + + vdev->regions_hpa = rte_calloc("vhost hpa region", + vdev->nregions_hpa, + sizeof(struct virtio_memory_regions_hpa), + RTE_CACHE_LINE_SIZE); + if (vdev->regions_hpa == NULL) { + RTE_LOG(ERR, VHOST_CONFIG, "Cannot allocate memory for hpa region\n"); + rte_free(vdev); + return -1; + } + + + if (fill_hpa_memory_regions( + vdev->regions_hpa, dev->mem + ) != vdev->nregions_hpa) { + + RTE_LOG(ERR, VHOST_CONFIG, + "hpa memory regions number mismatch: " + "[%d]\n", vdev->nregions_hpa); + rte_free(vdev->regions_hpa); + rte_free(vdev); + return -1; + } + } + + + /* 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, num_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->vmdq_rx_q + = dev->device_fh * queues_per_pool + vmdq_queue_base; + + if (zero_copy) { + uint32_t index = vdev->vmdq_rx_q; + uint32_t count_in_ring, i; + struct mbuf_table *tx_q; + + count_in_ring = rte_ring_count(vpool_array[index].ring); + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") in new_device: mbuf count in mempool " + "before attach is: %d\n", + dev->device_fh, + rte_mempool_count(vpool_array[index].pool)); + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") in new_device: mbuf count in ring " + "before attach is : %d\n", + dev->device_fh, count_in_ring); + + /* + * Attach all mbufs in vpool.ring and put back intovpool.pool. + */ + for (i = 0; i < count_in_ring; i++) + attach_rxmbuf_zcp(dev); + + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") in new_device: mbuf count in " + "mempool after attach is: %d\n", + dev->device_fh, + rte_mempool_count(vpool_array[index].pool)); + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") in new_device: mbuf count in " + "ring after attach is : %d\n", + dev->device_fh, + rte_ring_count(vpool_array[index].ring)); + + tx_q = &tx_queue_zcp[(uint16_t)vdev->vmdq_rx_q]; + tx_q->txq_id = vdev->vmdq_rx_q; + + if (rte_eth_dev_tx_queue_start(ports[0], vdev->vmdq_rx_q) != 0) { + struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q]; + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") In new_device: Failed to start " + "tx queue:%d\n", + dev->device_fh, vdev->vmdq_rx_q); + + mbuf_destroy_zcp(vpool); + rte_free(vdev->regions_hpa); + rte_free(vdev); + return -1; + } + + if (rte_eth_dev_rx_queue_start(ports[0], vdev->vmdq_rx_q) != 0) { + struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q]; + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") In new_device: Failed to start " + "rx queue:%d\n", + dev->device_fh, vdev->vmdq_rx_q); + + /* Stop the TX queue. */ + if (rte_eth_dev_tx_queue_stop(ports[0], + vdev->vmdq_rx_q) != 0) { + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") In new_device: Failed to " + "stop tx queue:%d\n", + dev->device_fh, vdev->vmdq_rx_q); + } + + mbuf_destroy_zcp(vpool); + rte_free(vdev->regions_hpa); + rte_free(vdev); + return -1; + } + + } + + /*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; + if (zero_copy == 0) { + rx_total = rte_atomic64_read( + &dev_statistics[device_fh].rx_total_atomic); + rx = rte_atomic64_read( + &dev_statistics[device_fh].rx_atomic); + } else { + rx_total = dev_statistics[device_fh].rx_total; + rx = dev_statistics[device_fh].rx; + } + 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"); + } +} + +static void +setup_mempool_tbl(int socket, uint32_t index, char *pool_name, + char *ring_name, uint32_t nb_mbuf) +{ + vpool_array[index].pool = rte_pktmbuf_pool_create(pool_name, nb_mbuf, + MBUF_CACHE_SIZE_ZCP, 0, MBUF_DATA_SIZE_ZCP, socket); + if (vpool_array[index].pool != NULL) { + vpool_array[index].ring + = rte_ring_create(ring_name, + rte_align32pow2(nb_mbuf + 1), + socket, RING_F_SP_ENQ | RING_F_SC_DEQ); + if (likely(vpool_array[index].ring != NULL)) { + LOG_DEBUG(VHOST_CONFIG, + "in setup_mempool_tbl: mbuf count in " + "mempool is: %d\n", + rte_mempool_count(vpool_array[index].pool)); + LOG_DEBUG(VHOST_CONFIG, + "in setup_mempool_tbl: mbuf count in " + "ring is: %d\n", + rte_ring_count(vpool_array[index].ring)); + } else { + rte_exit(EXIT_FAILURE, "ring_create(%s) failed", + ring_name); + } + + /* Need consider head room. */ + vpool_array[index].buf_size = VIRTIO_DESCRIPTOR_LEN_ZCP; + } else { + rte_exit(EXIT_FAILURE, "mempool_create(%s) failed", pool_name); + } +} + +/* When we receive a INT signal, unregister vhost driver */ +static void +sigint_handler(__rte_unused int signum) +{ + /* Unregister vhost driver. */ + int ret = rte_vhost_driver_unregister((char *)&dev_basename); + if (ret != 0) + rte_exit(EXIT_FAILURE, "vhost driver unregister failure.\n"); + exit(0); +} + +/* + * 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_num_ports; + int ret; + uint8_t portid; + uint16_t queue_id; + static pthread_t tid; + char thread_name[RTE_MAX_THREAD_NAME_LEN]; + + 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 ++) + 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"); + + /*set the number of swithcing cores available*/ + num_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 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; + } + + if (zero_copy == 0) { + /* Create the mbuf pool. */ + mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", + NUM_MBUFS_PER_PORT * valid_num_ports, MBUF_CACHE_SIZE, + 0, MBUF_DATA_SIZE, rte_socket_id()); + 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; + + 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; + LOG_DEBUG(VHOST_CONFIG, + "Enable loop back for L2 switch in vmdq.\n"); + } + } else { + uint32_t nb_mbuf; + char pool_name[RTE_MEMPOOL_NAMESIZE]; + char ring_name[RTE_MEMPOOL_NAMESIZE]; + + nb_mbuf = num_rx_descriptor + + num_switching_cores * MBUF_CACHE_SIZE_ZCP + + num_switching_cores * MAX_PKT_BURST; + + for (queue_id = 0; queue_id < MAX_QUEUES; queue_id++) { + snprintf(pool_name, sizeof(pool_name), + "rxmbuf_pool_%u", queue_id); + snprintf(ring_name, sizeof(ring_name), + "rxmbuf_ring_%u", queue_id); + setup_mempool_tbl(rte_socket_id(), queue_id, + pool_name, ring_name, nb_mbuf); + } + + nb_mbuf = num_tx_descriptor + + num_switching_cores * MBUF_CACHE_SIZE_ZCP + + num_switching_cores * MAX_PKT_BURST; + + for (queue_id = 0; queue_id < MAX_QUEUES; queue_id++) { + snprintf(pool_name, sizeof(pool_name), + "txmbuf_pool_%u", queue_id); + snprintf(ring_name, sizeof(ring_name), + "txmbuf_ring_%u", queue_id); + setup_mempool_tbl(rte_socket_id(), + (queue_id + MAX_QUEUES), + pool_name, ring_name, nb_mbuf); + } + + 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; + LOG_DEBUG(VHOST_CONFIG, + "Enable loop back for L2 switch in vmdq.\n"); + } + } + /* 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; + } + if (port_init(portid) != 0) + rte_exit(EXIT_FAILURE, + "Cannot initialize network ports\n"); + } + + /* 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) { + ret = pthread_create(&tid, NULL, (void *)print_stats, NULL); + if (ret != 0) + rte_exit(EXIT_FAILURE, + "Cannot create print-stats thread\n"); + + /* Set thread_name for aid in debugging. */ + snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "print-stats"); + ret = rte_thread_setname(tid, thread_name); + if (ret != 0) + RTE_LOG(ERR, VHOST_CONFIG, + "Cannot set print-stats name\n"); + } + + /* Launch all data cores. */ + if (zero_copy == 0) { + RTE_LCORE_FOREACH_SLAVE(lcore_id) { + rte_eal_remote_launch(switch_worker, + mbuf_pool, lcore_id); + } + } else { + uint32_t count_in_mempool, index, i; + for (index = 0; index < 2*MAX_QUEUES; index++) { + /* For all RX and TX queues. */ + count_in_mempool + = rte_mempool_count(vpool_array[index].pool); + + /* + * Transfer all un-attached mbufs from vpool.pool + * to vpoo.ring. + */ + for (i = 0; i < count_in_mempool; i++) { + struct rte_mbuf *mbuf + = __rte_mbuf_raw_alloc( + vpool_array[index].pool); + rte_ring_sp_enqueue(vpool_array[index].ring, + (void *)mbuf); + } + + LOG_DEBUG(VHOST_CONFIG, + "in main: mbuf count in mempool at initial " + "is: %d\n", count_in_mempool); + LOG_DEBUG(VHOST_CONFIG, + "in main: mbuf count in ring at initial is :" + " %d\n", + rte_ring_count(vpool_array[index].ring)); + } + + RTE_LCORE_FOREACH_SLAVE(lcore_id) + rte_eal_remote_launch(switch_worker_zcp, NULL, + lcore_id); + } + + if (mergeable == 0) + rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF); + + /* Register vhost(cuse or user) driver to handle vhost messages. */ + ret = rte_vhost_driver_register((char *)&dev_basename); + if (ret != 0) + rte_exit(EXIT_FAILURE, "vhost driver register failure.\n"); + + rte_vhost_driver_callback_register(&virtio_net_device_ops); + + /* Start CUSE session. */ + rte_vhost_driver_session_start(); + return 0; + +} |