1 /* 2 * Copyright (C) 2015-2017 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/bitfield.h> 35 #include <linux/netdevice.h> 36 #include <linux/skbuff.h> 37 #include <linux/workqueue.h> 38 #include <net/dst_metadata.h> 39 40 #include "main.h" 41 #include "../nfp_net.h" 42 #include "../nfp_net_repr.h" 43 #include "./cmsg.h" 44 45 static struct nfp_flower_cmsg_hdr * 46 nfp_flower_cmsg_get_hdr(struct sk_buff *skb) 47 { 48 return (struct nfp_flower_cmsg_hdr *)skb->data; 49 } 50 51 struct sk_buff * 52 nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size, 53 enum nfp_flower_cmsg_type_port type) 54 { 55 struct nfp_flower_cmsg_hdr *ch; 56 struct sk_buff *skb; 57 58 size += NFP_FLOWER_CMSG_HLEN; 59 60 skb = nfp_app_ctrl_msg_alloc(app, size, GFP_KERNEL); 61 if (!skb) 62 return NULL; 63 64 ch = nfp_flower_cmsg_get_hdr(skb); 65 ch->pad = 0; 66 ch->version = NFP_FLOWER_CMSG_VER1; 67 ch->type = type; 68 skb_put(skb, size); 69 70 return skb; 71 } 72 73 struct sk_buff * 74 nfp_flower_cmsg_mac_repr_start(struct nfp_app *app, unsigned int num_ports) 75 { 76 struct nfp_flower_cmsg_mac_repr *msg; 77 struct sk_buff *skb; 78 unsigned int size; 79 80 size = sizeof(*msg) + num_ports * sizeof(msg->ports[0]); 81 skb = nfp_flower_cmsg_alloc(app, size, NFP_FLOWER_CMSG_TYPE_MAC_REPR); 82 if (!skb) 83 return NULL; 84 85 msg = nfp_flower_cmsg_get_data(skb); 86 memset(msg->reserved, 0, sizeof(msg->reserved)); 87 msg->num_ports = num_ports; 88 89 return skb; 90 } 91 92 void 93 nfp_flower_cmsg_mac_repr_add(struct sk_buff *skb, unsigned int idx, 94 unsigned int nbi, unsigned int nbi_port, 95 unsigned int phys_port) 96 { 97 struct nfp_flower_cmsg_mac_repr *msg; 98 99 msg = nfp_flower_cmsg_get_data(skb); 100 msg->ports[idx].idx = idx; 101 msg->ports[idx].info = nbi & NFP_FLOWER_CMSG_MAC_REPR_NBI; 102 msg->ports[idx].nbi_port = nbi_port; 103 msg->ports[idx].phys_port = phys_port; 104 } 105 106 int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok) 107 { 108 struct nfp_flower_cmsg_portmod *msg; 109 struct sk_buff *skb; 110 111 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg), 112 NFP_FLOWER_CMSG_TYPE_PORT_MOD); 113 if (!skb) 114 return -ENOMEM; 115 116 msg = nfp_flower_cmsg_get_data(skb); 117 msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id); 118 msg->reserved = 0; 119 msg->info = carrier_ok; 120 msg->mtu = cpu_to_be16(repr->netdev->mtu); 121 122 nfp_ctrl_tx(repr->app->ctrl, skb); 123 124 return 0; 125 } 126 127 static void 128 nfp_flower_cmsg_portmod_rx(struct nfp_app *app, struct sk_buff *skb) 129 { 130 struct nfp_flower_cmsg_portmod *msg; 131 struct net_device *netdev; 132 bool link; 133 134 msg = nfp_flower_cmsg_get_data(skb); 135 link = msg->info & NFP_FLOWER_CMSG_PORTMOD_INFO_LINK; 136 137 rtnl_lock(); 138 rcu_read_lock(); 139 netdev = nfp_app_repr_get(app, be32_to_cpu(msg->portnum)); 140 rcu_read_unlock(); 141 if (!netdev) { 142 nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n", 143 be32_to_cpu(msg->portnum)); 144 rtnl_unlock(); 145 return; 146 } 147 148 if (link) { 149 u16 mtu = be16_to_cpu(msg->mtu); 150 151 netif_carrier_on(netdev); 152 153 /* An MTU of 0 from the firmware should be ignored */ 154 if (mtu) 155 dev_set_mtu(netdev, mtu); 156 } else { 157 netif_carrier_off(netdev); 158 } 159 rtnl_unlock(); 160 } 161 162 static void 163 nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb) 164 { 165 struct nfp_flower_cmsg_hdr *cmsg_hdr; 166 enum nfp_flower_cmsg_type_port type; 167 168 cmsg_hdr = nfp_flower_cmsg_get_hdr(skb); 169 170 if (unlikely(cmsg_hdr->version != NFP_FLOWER_CMSG_VER1)) { 171 nfp_flower_cmsg_warn(app, "Cannot handle repr control version %u\n", 172 cmsg_hdr->version); 173 goto out; 174 } 175 176 type = cmsg_hdr->type; 177 switch (type) { 178 case NFP_FLOWER_CMSG_TYPE_PORT_MOD: 179 nfp_flower_cmsg_portmod_rx(app, skb); 180 break; 181 case NFP_FLOWER_CMSG_TYPE_FLOW_STATS: 182 nfp_flower_rx_flow_stats(app, skb); 183 break; 184 case NFP_FLOWER_CMSG_TYPE_NO_NEIGH: 185 nfp_tunnel_request_route(app, skb); 186 break; 187 case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS: 188 nfp_tunnel_keep_alive(app, skb); 189 break; 190 case NFP_FLOWER_CMSG_TYPE_TUN_NEIGH: 191 /* Acks from the NFP that the route is added - ignore. */ 192 break; 193 default: 194 nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n", 195 type); 196 goto out; 197 } 198 199 dev_consume_skb_any(skb); 200 return; 201 out: 202 dev_kfree_skb_any(skb); 203 } 204 205 void nfp_flower_cmsg_process_rx(struct work_struct *work) 206 { 207 struct nfp_flower_priv *priv; 208 struct sk_buff *skb; 209 210 priv = container_of(work, struct nfp_flower_priv, cmsg_work); 211 212 while ((skb = skb_dequeue(&priv->cmsg_skbs))) 213 nfp_flower_cmsg_process_one_rx(priv->app, skb); 214 } 215 216 void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb) 217 { 218 struct nfp_flower_priv *priv = app->priv; 219 220 skb_queue_tail(&priv->cmsg_skbs, skb); 221 schedule_work(&priv->cmsg_work); 222 } 223