| 1 | /* |
| 2 | * QEMU rocker switch emulation - front-panel ports |
| 3 | * |
| 4 | * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include "qemu/osdep.h" |
| 18 | #include "qapi/qapi-types-rocker.h" |
| 19 | #include "rocker.h" |
| 20 | #include "rocker_hw.h" |
| 21 | #include "rocker_fp.h" |
| 22 | #include "rocker_world.h" |
| 23 | |
| 24 | enum duplex { |
| 25 | DUPLEX_HALF = 0, |
| 26 | DUPLEX_FULL |
| 27 | }; |
| 28 | |
| 29 | struct fp_port { |
| 30 | Rocker *r; |
| 31 | World *world; |
| 32 | unsigned int index; |
| 33 | char *name; |
| 34 | uint32_t pport; |
| 35 | bool enabled; |
| 36 | uint32_t speed; |
| 37 | uint8_t duplex; |
| 38 | uint8_t autoneg; |
| 39 | uint8_t learning; |
| 40 | NICState *nic; |
| 41 | NICConf conf; |
| 42 | }; |
| 43 | |
| 44 | char *fp_port_get_name(FpPort *port) |
| 45 | { |
| 46 | return port->name; |
| 47 | } |
| 48 | |
| 49 | bool fp_port_get_link_up(FpPort *port) |
| 50 | { |
| 51 | return !qemu_get_queue(port->nic)->link_down; |
| 52 | } |
| 53 | |
| 54 | RockerPort *fp_port_get_info(FpPort *port) |
| 55 | { |
| 56 | RockerPort *value = g_malloc0(sizeof(*value)); |
| 57 | |
| 58 | value->name = g_strdup(port->name); |
| 59 | value->enabled = port->enabled; |
| 60 | value->link_up = fp_port_get_link_up(port); |
| 61 | value->speed = port->speed; |
| 62 | value->duplex = port->duplex; |
| 63 | value->autoneg = port->autoneg; |
| 64 | return value; |
| 65 | } |
| 66 | |
| 67 | void fp_port_get_macaddr(FpPort *port, MACAddr *macaddr) |
| 68 | { |
| 69 | memcpy(macaddr->a, port->conf.macaddr.a, sizeof(macaddr->a)); |
| 70 | } |
| 71 | |
| 72 | void fp_port_set_macaddr(FpPort *port, MACAddr *macaddr) |
| 73 | { |
| 74 | /* XXX TODO implement and test setting mac addr |
| 75 | * XXX memcpy(port->conf.macaddr.a, macaddr.a, sizeof(port->conf.macaddr.a)); |
| 76 | */ |
| 77 | } |
| 78 | |
| 79 | uint8_t fp_port_get_learning(FpPort *port) |
| 80 | { |
| 81 | return port->learning; |
| 82 | } |
| 83 | |
| 84 | void fp_port_set_learning(FpPort *port, uint8_t learning) |
| 85 | { |
| 86 | port->learning = learning; |
| 87 | } |
| 88 | |
| 89 | int fp_port_get_settings(FpPort *port, uint32_t *speed, |
| 90 | uint8_t *duplex, uint8_t *autoneg) |
| 91 | { |
| 92 | *speed = port->speed; |
| 93 | *duplex = port->duplex; |
| 94 | *autoneg = port->autoneg; |
| 95 | |
| 96 | return ROCKER_OK; |
| 97 | } |
| 98 | |
| 99 | int fp_port_set_settings(FpPort *port, uint32_t speed, |
| 100 | uint8_t duplex, uint8_t autoneg) |
| 101 | { |
| 102 | /* XXX validate inputs */ |
| 103 | |
| 104 | port->speed = speed; |
| 105 | port->duplex = duplex; |
| 106 | port->autoneg = autoneg; |
| 107 | |
| 108 | return ROCKER_OK; |
| 109 | } |
| 110 | |
| 111 | bool fp_port_from_pport(uint32_t pport, uint32_t *port) |
| 112 | { |
| 113 | if (pport < 1 || pport > ROCKER_FP_PORTS_MAX) { |
| 114 | return false; |
| 115 | } |
| 116 | *port = pport - 1; |
| 117 | return true; |
| 118 | } |
| 119 | |
| 120 | int fp_port_eg(FpPort *port, const struct iovec *iov, int iovcnt) |
| 121 | { |
| 122 | NetClientState *nc = qemu_get_queue(port->nic); |
| 123 | |
| 124 | if (port->enabled) { |
| 125 | qemu_sendv_packet(nc, iov, iovcnt); |
| 126 | } |
| 127 | |
| 128 | return ROCKER_OK; |
| 129 | } |
| 130 | |
| 131 | static ssize_t fp_port_receive_iov(NetClientState *nc, const struct iovec *iov, |
| 132 | int iovcnt) |
| 133 | { |
| 134 | FpPort *port = qemu_get_nic_opaque(nc); |
| 135 | |
| 136 | /* If the port is disabled, we want to drop this pkt |
| 137 | * now rather than queueing it for later. We don't want |
| 138 | * any stale pkts getting into the device when the port |
| 139 | * transitions to enabled. |
| 140 | */ |
| 141 | |
| 142 | if (!port->enabled) { |
| 143 | return -1; |
| 144 | } |
| 145 | |
| 146 | return world_ingress(port->world, port->pport, iov, iovcnt); |
| 147 | } |
| 148 | |
| 149 | static ssize_t fp_port_receive(NetClientState *nc, const uint8_t *buf, |
| 150 | size_t size) |
| 151 | { |
| 152 | const struct iovec iov = { |
| 153 | .iov_base = (uint8_t *)buf, |
| 154 | .iov_len = size |
| 155 | }; |
| 156 | |
| 157 | return fp_port_receive_iov(nc, &iov, 1); |
| 158 | } |
| 159 | |
| 160 | static void fp_port_cleanup(NetClientState *nc) |
| 161 | { |
| 162 | } |
| 163 | |
| 164 | static void fp_port_set_link_status(NetClientState *nc) |
| 165 | { |
| 166 | FpPort *port = qemu_get_nic_opaque(nc); |
| 167 | |
| 168 | rocker_event_link_changed(port->r, port->pport, !nc->link_down); |
| 169 | } |
| 170 | |
| 171 | static NetClientInfo fp_port_info = { |
| 172 | .type = NET_CLIENT_DRIVER_NIC, |
| 173 | .size = sizeof(NICState), |
| 174 | .receive = fp_port_receive, |
| 175 | .receive_iov = fp_port_receive_iov, |
| 176 | .cleanup = fp_port_cleanup, |
| 177 | .link_status_changed = fp_port_set_link_status, |
| 178 | }; |
| 179 | |
| 180 | World *fp_port_get_world(FpPort *port) |
| 181 | { |
| 182 | return port->world; |
| 183 | } |
| 184 | |
| 185 | void fp_port_set_world(FpPort *port, World *world) |
| 186 | { |
| 187 | DPRINTF("port %d setting world \"%s\"\n", port->index, world_name(world)); |
| 188 | port->world = world; |
| 189 | } |
| 190 | |
| 191 | bool fp_port_check_world(FpPort *port, World *world) |
| 192 | { |
| 193 | return port->world == world; |
| 194 | } |
| 195 | |
| 196 | bool fp_port_enabled(FpPort *port) |
| 197 | { |
| 198 | return port->enabled; |
| 199 | } |
| 200 | |
| 201 | static void fp_port_set_link(FpPort *port, bool up) |
| 202 | { |
| 203 | NetClientState *nc = qemu_get_queue(port->nic); |
| 204 | |
| 205 | if (up == nc->link_down) { |
| 206 | nc->link_down = !up; |
| 207 | nc->info->link_status_changed(nc); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | void fp_port_enable(FpPort *port) |
| 212 | { |
| 213 | fp_port_set_link(port, true); |
| 214 | port->enabled = true; |
| 215 | DPRINTF("port %d enabled\n", port->index); |
| 216 | } |
| 217 | |
| 218 | void fp_port_disable(FpPort *port) |
| 219 | { |
| 220 | port->enabled = false; |
| 221 | fp_port_set_link(port, false); |
| 222 | DPRINTF("port %d disabled\n", port->index); |
| 223 | } |
| 224 | |
| 225 | FpPort *fp_port_alloc(Rocker *r, char *sw_name, |
| 226 | MACAddr *start_mac, unsigned int index, |
| 227 | NICPeers *peers) |
| 228 | { |
| 229 | FpPort *port = g_new0(FpPort, 1); |
| 230 | |
| 231 | port->r = r; |
| 232 | port->index = index; |
| 233 | port->pport = index + 1; |
| 234 | |
| 235 | /* front-panel switch port names are 1-based */ |
| 236 | |
| 237 | port->name = g_strdup_printf("%sp%d", sw_name, port->pport); |
| 238 | |
| 239 | memcpy(port->conf.macaddr.a, start_mac, sizeof(port->conf.macaddr.a)); |
| 240 | port->conf.macaddr.a[5] += index; |
| 241 | port->conf.bootindex = -1; |
| 242 | port->conf.peers = *peers; |
| 243 | |
| 244 | port->nic = qemu_new_nic(&fp_port_info, &port->conf, sw_name, NULL, |
| 245 | &DEVICE(r)->mem_reentrancy_guard, port); |
| 246 | qemu_format_nic_info_str(qemu_get_queue(port->nic), |
| 247 | port->conf.macaddr.a); |
| 248 | |
| 249 | fp_port_reset(port); |
| 250 | |
| 251 | return port; |
| 252 | } |
| 253 | |
| 254 | void fp_port_free(FpPort *port) |
| 255 | { |
| 256 | qemu_del_nic(port->nic); |
| 257 | g_free(port->name); |
| 258 | g_free(port); |
| 259 | } |
| 260 | |
| 261 | void fp_port_reset(FpPort *port) |
| 262 | { |
| 263 | fp_port_disable(port); |
| 264 | port->speed = 10000; /* 10Gbps */ |
| 265 | port->duplex = DUPLEX_FULL; |
| 266 | port->autoneg = 0; |
| 267 | } |