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, gfp_t flag) 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, flag); 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 GFP_KERNEL); 83 if (!skb) 84 return NULL; 85 86 msg = nfp_flower_cmsg_get_data(skb); 87 memset(msg->reserved, 0, sizeof(msg->reserved)); 88 msg->num_ports = num_ports; 89 90 return skb; 91 } 92 93 void 94 nfp_flower_cmsg_mac_repr_add(struct sk_buff *skb, unsigned int idx, 95 unsigned int nbi, unsigned int nbi_port, 96 unsigned int phys_port) 97 { 98 struct nfp_flower_cmsg_mac_repr *msg; 99 100 msg = nfp_flower_cmsg_get_data(skb); 101 msg->ports[idx].idx = idx; 102 msg->ports[idx].info = nbi & NFP_FLOWER_CMSG_MAC_REPR_NBI; 103 msg->ports[idx].nbi_port = nbi_port; 104 msg->ports[idx].phys_port = phys_port; 105 } 106 107 int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok) 108 { 109 struct nfp_flower_cmsg_portmod *msg; 110 struct sk_buff *skb; 111 112 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg), 113 NFP_FLOWER_CMSG_TYPE_PORT_MOD, GFP_KERNEL); 114 if (!skb) 115 return -ENOMEM; 116 117 msg = nfp_flower_cmsg_get_data(skb); 118 msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id); 119 msg->reserved = 0; 120 msg->info = carrier_ok; 121 msg->mtu = cpu_to_be16(repr->netdev->mtu); 122 123 nfp_ctrl_tx(repr->app->ctrl, skb); 124 125 return 0; 126 } 127 128 int nfp_flower_cmsg_portreify(struct nfp_repr *repr, bool exists) 129 { 130 struct nfp_flower_cmsg_portreify *msg; 131 struct sk_buff *skb; 132 133 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg), 134 NFP_FLOWER_CMSG_TYPE_PORT_REIFY, 135 GFP_KERNEL); 136 if (!skb) 137 return -ENOMEM; 138 139 msg = nfp_flower_cmsg_get_data(skb); 140 msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id); 141 msg->reserved = 0; 142 msg->info = cpu_to_be16(exists); 143 144 nfp_ctrl_tx(repr->app->ctrl, skb); 145 146 return 0; 147 } 148 149 static void 150 nfp_flower_cmsg_portmod_rx(struct nfp_app *app, struct sk_buff *skb) 151 { 152 struct nfp_flower_cmsg_portmod *msg; 153 struct net_device *netdev; 154 bool link; 155 156 msg = nfp_flower_cmsg_get_data(skb); 157 link = msg->info & NFP_FLOWER_CMSG_PORTMOD_INFO_LINK; 158 159 rtnl_lock(); 160 rcu_read_lock(); 161 netdev = nfp_app_repr_get(app, be32_to_cpu(msg->portnum)); 162 rcu_read_unlock(); 163 if (!netdev) { 164 nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n", 165 be32_to_cpu(msg->portnum)); 166 rtnl_unlock(); 167 return; 168 } 169 170 if (link) { 171 u16 mtu = be16_to_cpu(msg->mtu); 172 173 netif_carrier_on(netdev); 174 175 /* An MTU of 0 from the firmware should be ignored */ 176 if (mtu) 177 dev_set_mtu(netdev, mtu); 178 } else { 179 netif_carrier_off(netdev); 180 } 181 rtnl_unlock(); 182 } 183 184 static void 185 nfp_flower_cmsg_portreify_rx(struct nfp_app *app, struct sk_buff *skb) 186 { 187 struct nfp_flower_priv *priv = app->priv; 188 struct nfp_flower_cmsg_portreify *msg; 189 bool exists; 190 191 msg = nfp_flower_cmsg_get_data(skb); 192 193 rcu_read_lock(); 194 exists = !!nfp_app_repr_get(app, be32_to_cpu(msg->portnum)); 195 rcu_read_unlock(); 196 if (!exists) { 197 nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n", 198 be32_to_cpu(msg->portnum)); 199 return; 200 } 201 202 atomic_inc(&priv->reify_replies); 203 wake_up_interruptible(&priv->reify_wait_queue); 204 } 205 206 static void 207 nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb) 208 { 209 struct nfp_flower_cmsg_hdr *cmsg_hdr; 210 enum nfp_flower_cmsg_type_port type; 211 212 cmsg_hdr = nfp_flower_cmsg_get_hdr(skb); 213 214 type = cmsg_hdr->type; 215 switch (type) { 216 case NFP_FLOWER_CMSG_TYPE_PORT_REIFY: 217 nfp_flower_cmsg_portreify_rx(app, skb); 218 break; 219 case NFP_FLOWER_CMSG_TYPE_PORT_MOD: 220 nfp_flower_cmsg_portmod_rx(app, skb); 221 break; 222 case NFP_FLOWER_CMSG_TYPE_NO_NEIGH: 223 nfp_tunnel_request_route(app, skb); 224 break; 225 case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS: 226 nfp_tunnel_keep_alive(app, skb); 227 break; 228 case NFP_FLOWER_CMSG_TYPE_TUN_NEIGH: 229 /* Acks from the NFP that the route is added - ignore. */ 230 break; 231 default: 232 nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n", 233 type); 234 goto out; 235 } 236 237 dev_consume_skb_any(skb); 238 return; 239 out: 240 dev_kfree_skb_any(skb); 241 } 242 243 void nfp_flower_cmsg_process_rx(struct work_struct *work) 244 { 245 struct nfp_flower_priv *priv; 246 struct sk_buff *skb; 247 248 priv = container_of(work, struct nfp_flower_priv, cmsg_work); 249 250 while ((skb = skb_dequeue(&priv->cmsg_skbs))) 251 nfp_flower_cmsg_process_one_rx(priv->app, skb); 252 } 253 254 void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb) 255 { 256 struct nfp_flower_priv *priv = app->priv; 257 struct nfp_flower_cmsg_hdr *cmsg_hdr; 258 259 cmsg_hdr = nfp_flower_cmsg_get_hdr(skb); 260 261 if (unlikely(cmsg_hdr->version != NFP_FLOWER_CMSG_VER1)) { 262 nfp_flower_cmsg_warn(app, "Cannot handle repr control version %u\n", 263 cmsg_hdr->version); 264 dev_kfree_skb_any(skb); 265 return; 266 } 267 268 if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_FLOW_STATS) { 269 /* We need to deal with stats updates from HW asap */ 270 nfp_flower_rx_flow_stats(app, skb); 271 dev_consume_skb_any(skb); 272 } else { 273 skb_queue_tail(&priv->cmsg_skbs, skb); 274 schedule_work(&priv->cmsg_work); 275 } 276 } 277