| /* |
| * Copyright (C) 2017 Netronome Systems, Inc. |
| * |
| * This software is licensed under the GNU General License Version 2, |
| * June 1991 as shown in the file COPYING in the top-level directory of this |
| * source tree. |
| * |
| * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" |
| * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE |
| * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME |
| * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/etherdevice.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/netdevice.h> |
| #include <linux/slab.h> |
| #include <net/netlink.h> |
| #include <net/pkt_cls.h> |
| #include <net/rtnetlink.h> |
| |
| #include "netdevsim.h" |
| |
| static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| |
| if (!nsim_ipsec_tx(ns, skb)) |
| goto out; |
| |
| u64_stats_update_begin(&ns->syncp); |
| ns->tx_packets++; |
| ns->tx_bytes += skb->len; |
| u64_stats_update_end(&ns->syncp); |
| |
| out: |
| dev_kfree_skb(skb); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static void nsim_set_rx_mode(struct net_device *dev) |
| { |
| } |
| |
| static int nsim_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| |
| if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU) |
| return -EBUSY; |
| |
| dev->mtu = new_mtu; |
| |
| return 0; |
| } |
| |
| static void |
| nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| unsigned int start; |
| |
| do { |
| start = u64_stats_fetch_begin(&ns->syncp); |
| stats->tx_bytes = ns->tx_bytes; |
| stats->tx_packets = ns->tx_packets; |
| } while (u64_stats_fetch_retry(&ns->syncp, start)); |
| } |
| |
| static int |
| nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) |
| { |
| return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv); |
| } |
| |
| static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| /* Only refuse multicast addresses, zero address can mean unset/any. */ |
| if (vf >= nsim_bus_dev->num_vfs || is_multicast_ether_addr(mac)) |
| return -EINVAL; |
| memcpy(nsim_bus_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN); |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_vlan(struct net_device *dev, int vf, |
| u16 vlan, u8 qos, __be16 vlan_proto) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs || vlan > 4095 || qos > 7) |
| return -EINVAL; |
| |
| nsim_bus_dev->vfconfigs[vf].vlan = vlan; |
| nsim_bus_dev->vfconfigs[vf].qos = qos; |
| nsim_bus_dev->vfconfigs[vf].vlan_proto = vlan_proto; |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| |
| nsim_bus_dev->vfconfigs[vf].min_tx_rate = min; |
| nsim_bus_dev->vfconfigs[vf].max_tx_rate = max; |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| nsim_bus_dev->vfconfigs[vf].spoofchk_enabled = val; |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| nsim_bus_dev->vfconfigs[vf].rss_query_enabled = val; |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| nsim_bus_dev->vfconfigs[vf].trusted = val; |
| |
| return 0; |
| } |
| |
| static int |
| nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| |
| ivi->vf = vf; |
| ivi->linkstate = nsim_bus_dev->vfconfigs[vf].link_state; |
| ivi->min_tx_rate = nsim_bus_dev->vfconfigs[vf].min_tx_rate; |
| ivi->max_tx_rate = nsim_bus_dev->vfconfigs[vf].max_tx_rate; |
| ivi->vlan = nsim_bus_dev->vfconfigs[vf].vlan; |
| ivi->vlan_proto = nsim_bus_dev->vfconfigs[vf].vlan_proto; |
| ivi->qos = nsim_bus_dev->vfconfigs[vf].qos; |
| memcpy(&ivi->mac, nsim_bus_dev->vfconfigs[vf].vf_mac, ETH_ALEN); |
| ivi->spoofchk = nsim_bus_dev->vfconfigs[vf].spoofchk_enabled; |
| ivi->trusted = nsim_bus_dev->vfconfigs[vf].trusted; |
| ivi->rss_query_en = nsim_bus_dev->vfconfigs[vf].rss_query_enabled; |
| |
| return 0; |
| } |
| |
| static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; |
| |
| if (vf >= nsim_bus_dev->num_vfs) |
| return -EINVAL; |
| |
| switch (state) { |
| case IFLA_VF_LINK_STATE_AUTO: |
| case IFLA_VF_LINK_STATE_ENABLE: |
| case IFLA_VF_LINK_STATE_DISABLE: |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| nsim_bus_dev->vfconfigs[vf].link_state = state; |
| |
| return 0; |
| } |
| |
| static LIST_HEAD(nsim_block_cb_list); |
| |
| static int |
| nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| |
| switch (type) { |
| case TC_SETUP_BLOCK: |
| return flow_block_cb_setup_simple(type_data, |
| &nsim_block_cb_list, |
| nsim_setup_tc_block_cb, |
| ns, ns, true); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static int |
| nsim_set_features(struct net_device *dev, netdev_features_t features) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| |
| if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC)) |
| return nsim_bpf_disable_tc(ns); |
| |
| return 0; |
| } |
| |
| static struct devlink_port *nsim_get_devlink_port(struct net_device *dev) |
| { |
| struct netdevsim *ns = netdev_priv(dev); |
| |
| return &ns->nsim_dev_port->devlink_port; |
| } |
| |
| static const struct net_device_ops nsim_netdev_ops = { |
| .ndo_start_xmit = nsim_start_xmit, |
| .ndo_set_rx_mode = nsim_set_rx_mode, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_change_mtu = nsim_change_mtu, |
| .ndo_get_stats64 = nsim_get_stats64, |
| .ndo_set_vf_mac = nsim_set_vf_mac, |
| .ndo_set_vf_vlan = nsim_set_vf_vlan, |
| .ndo_set_vf_rate = nsim_set_vf_rate, |
| .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk, |
| .ndo_set_vf_trust = nsim_set_vf_trust, |
| .ndo_get_vf_config = nsim_get_vf_config, |
| .ndo_set_vf_link_state = nsim_set_vf_link_state, |
| .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en, |
| .ndo_setup_tc = nsim_setup_tc, |
| .ndo_set_features = nsim_set_features, |
| .ndo_bpf = nsim_bpf, |
| .ndo_get_devlink_port = nsim_get_devlink_port, |
| }; |
| |
| static void nsim_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| eth_hw_addr_random(dev); |
| |
| dev->tx_queue_len = 0; |
| dev->flags |= IFF_NOARP; |
| dev->flags &= ~IFF_MULTICAST; |
| dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | |
| IFF_NO_QUEUE; |
| dev->features |= NETIF_F_HIGHDMA | |
| NETIF_F_SG | |
| NETIF_F_FRAGLIST | |
| NETIF_F_HW_CSUM | |
| NETIF_F_TSO; |
| dev->hw_features |= NETIF_F_HW_TC; |
| dev->max_mtu = ETH_MAX_MTU; |
| } |
| |
| struct netdevsim * |
| nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port) |
| { |
| struct net_device *dev; |
| struct netdevsim *ns; |
| int err; |
| |
| dev = alloc_netdev(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup); |
| if (!dev) |
| return ERR_PTR(-ENOMEM); |
| |
| ns = netdev_priv(dev); |
| ns->netdev = dev; |
| u64_stats_init(&ns->syncp); |
| ns->nsim_dev = nsim_dev; |
| ns->nsim_dev_port = nsim_dev_port; |
| ns->nsim_bus_dev = nsim_dev->nsim_bus_dev; |
| SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev); |
| dev->netdev_ops = &nsim_netdev_ops; |
| |
| rtnl_lock(); |
| err = nsim_bpf_init(ns); |
| if (err) |
| goto err_rtnl_unlock; |
| |
| nsim_ipsec_init(ns); |
| |
| err = register_netdevice(dev); |
| if (err) |
| goto err_ipsec_teardown; |
| rtnl_unlock(); |
| |
| return ns; |
| |
| err_ipsec_teardown: |
| nsim_ipsec_teardown(ns); |
| nsim_bpf_uninit(ns); |
| err_rtnl_unlock: |
| rtnl_unlock(); |
| free_netdev(dev); |
| return ERR_PTR(err); |
| } |
| |
| void nsim_destroy(struct netdevsim *ns) |
| { |
| struct net_device *dev = ns->netdev; |
| |
| rtnl_lock(); |
| unregister_netdevice(dev); |
| nsim_ipsec_teardown(ns); |
| nsim_bpf_uninit(ns); |
| rtnl_unlock(); |
| free_netdev(dev); |
| } |
| |
| static int nsim_validate(struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| NL_SET_ERR_MSG_MOD(extack, "Please use: echo \"[ID] [PORT_COUNT]\" > /sys/bus/netdevsim/new_device"); |
| return -EOPNOTSUPP; |
| } |
| |
| static struct rtnl_link_ops nsim_link_ops __read_mostly = { |
| .kind = DRV_NAME, |
| .validate = nsim_validate, |
| }; |
| |
| static int __init nsim_module_init(void) |
| { |
| int err; |
| |
| err = nsim_dev_init(); |
| if (err) |
| return err; |
| |
| err = nsim_bus_init(); |
| if (err) |
| goto err_dev_exit; |
| |
| err = nsim_fib_init(); |
| if (err) |
| goto err_bus_exit; |
| |
| err = rtnl_link_register(&nsim_link_ops); |
| if (err) |
| goto err_fib_exit; |
| |
| return 0; |
| |
| err_fib_exit: |
| nsim_fib_exit(); |
| err_bus_exit: |
| nsim_bus_exit(); |
| err_dev_exit: |
| nsim_dev_exit(); |
| return err; |
| } |
| |
| static void __exit nsim_module_exit(void) |
| { |
| rtnl_link_unregister(&nsim_link_ops); |
| nsim_fib_exit(); |
| nsim_bus_exit(); |
| nsim_dev_exit(); |
| } |
| |
| module_init(nsim_module_init); |
| module_exit(nsim_module_exit); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_RTNL_LINK(DRV_NAME); |