hw/net/rocker/rocker_fp.c

   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 "net/clients.h"
  18
  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 void fp_port_get_info(FpPort *port, RockerPortList *info)
  55 {
  56     info->value->name = g_strdup(port->name);
  57     info->value->enabled = port->enabled;
  58     info->value->link_up = fp_port_get_link_up(port);
  59     info->value->speed = port->speed;
  60     info->value->duplex = port->duplex;
  61     info->value->autoneg = port->autoneg;
  62 }
  63
  64 void fp_port_get_macaddr(FpPort *port, MACAddr *macaddr)
  65 {
  66     memcpy(macaddr->a, port->conf.macaddr.a, sizeof(macaddr->a));
  67 }
  68
  69 void fp_port_set_macaddr(FpPort *port, MACAddr *macaddr)
  70 {
  71 /* XXX TODO implement and test setting mac addr
  72  * XXX memcpy(port->conf.macaddr.a, macaddr.a, sizeof(port->conf.macaddr.a));
  73  */
  74 }
  75
  76 uint8_t fp_port_get_learning(FpPort *port)
  77 {
  78     return port->learning;
  79 }
  80
  81 void fp_port_set_learning(FpPort *port, uint8_t learning)
  82 {
  83     port->learning = learning;
  84 }
  85
  86 int fp_port_get_settings(FpPort *port, uint32_t *speed,
  87                          uint8_t *duplex, uint8_t *autoneg)
  88 {
  89     *speed = port->speed;
  90     *duplex = port->duplex;
  91     *autoneg = port->autoneg;
  92
  93     return ROCKER_OK;
  94 }
  95
  96 int fp_port_set_settings(FpPort *port, uint32_t speed,
  97                          uint8_t duplex, uint8_t autoneg)
  98 {
  99     /* XXX validate inputs */
 100
 101     port->speed = speed;
 102     port->duplex = duplex;
 103     port->autoneg = autoneg;
 104
 105     return ROCKER_OK;
 106 }
 107
 108 bool fp_port_from_pport(uint32_t pport, uint32_t *port)
 109 {
 110     if (pport < 1 || pport > ROCKER_FP_PORTS_MAX) {
 111         return false;
 112     }
 113     *port = pport - 1;
 114     return true;
 115 }
 116
 117 int fp_port_eg(FpPort *port, const struct iovec *iov, int iovcnt)
 118 {
 119     NetClientState *nc = qemu_get_queue(port->nic);
 120
 121     if (port->enabled) {
 122         qemu_sendv_packet(nc, iov, iovcnt);
 123     }
 124
 125     return ROCKER_OK;
 126 }
 127
 128 static ssize_t fp_port_receive_iov(NetClientState *nc, const struct iovec *iov,
 129                                    int iovcnt)
 130 {
 131     FpPort *port = qemu_get_nic_opaque(nc);
 132
 133     /* If the port is disabled, we want to drop this pkt
 134      * now rather than queing it for later.  We don't want
 135      * any stale pkts getting into the device when the port
 136      * transitions to enabled.
 137      */
 138
 139     if (!port->enabled) {
 140         return -1;
 141     }
 142
 143     return world_ingress(port->world, port->pport, iov, iovcnt);
 144 }
 145
 146 static ssize_t fp_port_receive(NetClientState *nc, const uint8_t *buf,
 147                                size_t size)
 148 {
 149     const struct iovec iov = {
 150         .iov_base = (uint8_t *)buf,
 151         .iov_len = size
 152     };
 153
 154     return fp_port_receive_iov(nc, &iov, 1);
 155 }
 156
 157 static void fp_port_cleanup(NetClientState *nc)
 158 {
 159 }
 160
 161 static void fp_port_set_link_status(NetClientState *nc)
 162 {
 163     FpPort *port = qemu_get_nic_opaque(nc);
 164
 165     rocker_event_link_changed(port->r, port->pport, !nc->link_down);
 166 }
 167
 168 static NetClientInfo fp_port_info = {
 169     .type = NET_CLIENT_OPTIONS_KIND_NIC,
 170     .size = sizeof(NICState),
 171     .receive = fp_port_receive,
 172     .receive_iov = fp_port_receive_iov,
 173     .cleanup = fp_port_cleanup,
 174     .link_status_changed = fp_port_set_link_status,
 175 };
 176
 177 World *fp_port_get_world(FpPort *port)
 178 {
 179     return port->world;
 180 }
 181
 182 void fp_port_set_world(FpPort *port, World *world)
 183 {
 184     DPRINTF("port %d setting world \"%s\"\n", port->index, world_name(world));
 185     port->world = world;
 186 }
 187
 188 bool fp_port_enabled(FpPort *port)
 189 {
 190     return port->enabled;
 191 }
 192
 193 static void fp_port_set_link(FpPort *port, bool up)
 194 {
 195     NetClientState *nc = qemu_get_queue(port->nic);
 196
 197     if (up == nc->link_down) {
 198         nc->link_down = !up;
 199         nc->info->link_status_changed(nc);
 200     }
 201 }
 202
 203 void fp_port_enable(FpPort *port)
 204 {
 205     fp_port_set_link(port, true);
 206     port->enabled = true;
 207     DPRINTF("port %d enabled\n", port->index);
 208 }
 209
 210 void fp_port_disable(FpPort *port)
 211 {
 212     port->enabled = false;
 213     fp_port_set_link(port, false);
 214     DPRINTF("port %d disabled\n", port->index);
 215 }
 216
 217 FpPort *fp_port_alloc(Rocker *r, char *sw_name,
 218                       MACAddr *start_mac, unsigned int index,
 219                       NICPeers *peers)
 220 {
 221     FpPort *port = g_new0(FpPort, 1);
 222
 223     if (!port) {
 224         return NULL;
 225     }
 226
 227     port->r = r;
 228     port->index = index;
 229     port->pport = index + 1;
 230
 231     /* front-panel switch port names are 1-based */
 232
 233     port->name = g_strdup_printf("%sp%d", sw_name, port->pport);
 234
 235     memcpy(port->conf.macaddr.a, start_mac, sizeof(port->conf.macaddr.a));
 236     port->conf.macaddr.a[5] += index;
 237     port->conf.bootindex = -1;
 238     port->conf.peers = *peers;
 239
 240     port->nic = qemu_new_nic(&fp_port_info, &port->conf,
 241                              sw_name, NULL, port);
 242     qemu_format_nic_info_str(qemu_get_queue(port->nic),
 243                              port->conf.macaddr.a);
 244
 245     fp_port_reset(port);
 246
 247     return port;
 248 }
 249
 250 void fp_port_free(FpPort *port)
 251 {
 252     qemu_del_nic(port->nic);
 253     g_free(port->name);
 254     g_free(port);
 255 }
 256
 257 void fp_port_reset(FpPort *port)
 258 {
 259     fp_port_disable(port);
 260     port->speed = 10000;   /* 10Gbps */
 261     port->duplex = DUPLEX_FULL;
 262     port->autoneg = 0;
 263 }