drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/module.h>
  20 #include <linux/inetdevice.h>
  21 #include <net/cfg80211.h>
  22 #include <net/rtnetlink.h>
  23 #include <net/addrconf.h>
  24 #include <net/ipv6.h>
  25 #include <brcmu_utils.h>
  26 #include <brcmu_wifi.h>
  27
  28 #include "core.h"
  29 #include "bus.h"
  30 #include "debug.h"
  31 #include "fwil_types.h"
  32 #include "p2p.h"
  33 #include "cfg80211.h"
  34 #include "fwil.h"
  35 #include "feature.h"
  36 #include "proto.h"
  37 #include "pcie.h"
  38 #include "common.h"
  39
  40 #define MAX_WAIT_FOR_8021X_TX                   msecs_to_jiffies(950)
  41
  42 #define BRCMF_BSSIDX_INVALID                    -1
  43
  44 char *brcmf_ifname(struct brcmf_if *ifp)
  45 {
  46         if (!ifp)
  47                 return "<if_null>";
  48
  49         if (ifp->ndev)
  50                 return ifp->ndev->name;
  51
  52         return "<if_none>";
  53 }
  54
  55 struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx)
  56 {
  57         struct brcmf_if *ifp;
  58         s32 bsscfgidx;
  59
  60         if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) {
  61                 brcmf_err("ifidx %d out of range\n", ifidx);
  62                 return NULL;
  63         }
  64
  65         ifp = NULL;
  66         bsscfgidx = drvr->if2bss[ifidx];
  67         if (bsscfgidx >= 0)
  68                 ifp = drvr->iflist[bsscfgidx];
  69
  70         return ifp;
  71 }
  72
  73 static void _brcmf_set_multicast_list(struct work_struct *work)
  74 {
  75         struct brcmf_if *ifp;
  76         struct net_device *ndev;
  77         struct netdev_hw_addr *ha;
  78         u32 cmd_value, cnt;
  79         __le32 cnt_le;
  80         char *buf, *bufp;
  81         u32 buflen;
  82         s32 err;
  83
  84         ifp = container_of(work, struct brcmf_if, multicast_work);
  85
  86         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
  87
  88         ndev = ifp->ndev;
  89
  90         /* Determine initial value of allmulti flag */
  91         cmd_value = (ndev->flags & IFF_ALLMULTI) ? true : false;
  92
  93         /* Send down the multicast list first. */
  94         cnt = netdev_mc_count(ndev);
  95         buflen = sizeof(cnt) + (cnt * ETH_ALEN);
  96         buf = kmalloc(buflen, GFP_ATOMIC);
  97         if (!buf)
  98                 return;
  99         bufp = buf;
 100
 101         cnt_le = cpu_to_le32(cnt);
 102         memcpy(bufp, &cnt_le, sizeof(cnt_le));
 103         bufp += sizeof(cnt_le);
 104
 105         netdev_for_each_mc_addr(ha, ndev) {
 106                 if (!cnt)
 107                         break;
 108                 memcpy(bufp, ha->addr, ETH_ALEN);
 109                 bufp += ETH_ALEN;
 110                 cnt--;
 111         }
 112
 113         err = brcmf_fil_iovar_data_set(ifp, "mcast_list", buf, buflen);
 114         if (err < 0) {
 115                 brcmf_err("Setting mcast_list failed, %d\n", err);
 116                 cmd_value = cnt ? true : cmd_value;
 117         }
 118
 119         kfree(buf);
 120
 121         /*
 122          * Now send the allmulti setting.  This is based on the setting in the
 123          * net_device flags, but might be modified above to be turned on if we
 124          * were trying to set some addresses and dongle rejected it...
 125          */
 126         err = brcmf_fil_iovar_int_set(ifp, "allmulti", cmd_value);
 127         if (err < 0)
 128                 brcmf_err("Setting allmulti failed, %d\n", err);
 129
 130         /*Finally, pick up the PROMISC flag */
 131         cmd_value = (ndev->flags & IFF_PROMISC) ? true : false;
 132         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PROMISC, cmd_value);
 133         if (err < 0)
 134                 brcmf_err("Setting BRCMF_C_SET_PROMISC failed, %d\n",
 135                           err);
 136 }
 137
 138 #if IS_ENABLED(CONFIG_IPV6)
 139 static void _brcmf_update_ndtable(struct work_struct *work)
 140 {
 141         struct brcmf_if *ifp;
 142         int i, ret;
 143
 144         ifp = container_of(work, struct brcmf_if, ndoffload_work);
 145
 146         /* clear the table in firmware */
 147         ret = brcmf_fil_iovar_data_set(ifp, "nd_hostip_clear", NULL, 0);
 148         if (ret) {
 149                 brcmf_dbg(TRACE, "fail to clear nd ip table err:%d\n", ret);
 150                 return;
 151         }
 152
 153         for (i = 0; i < ifp->ipv6addr_idx; i++) {
 154                 ret = brcmf_fil_iovar_data_set(ifp, "nd_hostip",
 155                                                &ifp->ipv6_addr_tbl[i],
 156                                                sizeof(struct in6_addr));
 157                 if (ret)
 158                         brcmf_err("add nd ip err %d\n", ret);
 159         }
 160 }
 161 #else
 162 static void _brcmf_update_ndtable(struct work_struct *work)
 163 {
 164 }
 165 #endif
 166
 167 static int brcmf_netdev_set_mac_address(struct net_device *ndev, void *addr)
 168 {
 169         struct brcmf_if *ifp = netdev_priv(ndev);
 170         struct sockaddr *sa = (struct sockaddr *)addr;
 171         int err;
 172
 173         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 174
 175         err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", sa->sa_data,
 176                                        ETH_ALEN);
 177         if (err < 0) {
 178                 brcmf_err("Setting cur_etheraddr failed, %d\n", err);
 179         } else {
 180                 brcmf_dbg(TRACE, "updated to %pM\n", sa->sa_data);
 181                 memcpy(ifp->mac_addr, sa->sa_data, ETH_ALEN);
 182                 memcpy(ifp->ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 183         }
 184         return err;
 185 }
 186
 187 static void brcmf_netdev_set_multicast_list(struct net_device *ndev)
 188 {
 189         struct brcmf_if *ifp = netdev_priv(ndev);
 190
 191         schedule_work(&ifp->multicast_work);
 192 }
 193
 194 static netdev_tx_t brcmf_netdev_start_xmit(struct sk_buff *skb,
 195                                            struct net_device *ndev)
 196 {
 197         int ret;
 198         struct brcmf_if *ifp = netdev_priv(ndev);
 199         struct brcmf_pub *drvr = ifp->drvr;
 200         struct ethhdr *eh;
 201
 202         brcmf_dbg(DATA, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 203
 204         /* Can the device send data? */
 205         if (drvr->bus_if->state != BRCMF_BUS_UP) {
 206                 brcmf_err("xmit rejected state=%d\n", drvr->bus_if->state);
 207                 netif_stop_queue(ndev);
 208                 dev_kfree_skb(skb);
 209                 ret = -ENODEV;
 210                 goto done;
 211         }
 212
 213         /* Make sure there's enough writable headroom*/
 214         ret = skb_cow_head(skb, drvr->hdrlen);
 215         if (ret < 0) {
 216                 brcmf_err("%s: skb_cow_head failed\n",
 217                           brcmf_ifname(ifp));
 218                 dev_kfree_skb(skb);
 219                 goto done;
 220         }
 221
 222         /* validate length for ether packet */
 223         if (skb->len < sizeof(*eh)) {
 224                 ret = -EINVAL;
 225                 dev_kfree_skb(skb);
 226                 goto done;
 227         }
 228
 229         eh = (struct ethhdr *)(skb->data);
 230
 231         if (eh->h_proto == htons(ETH_P_PAE))
 232                 atomic_inc(&ifp->pend_8021x_cnt);
 233
 234         /* determine the priority */
 235         if ((skb->priority == 0) || (skb->priority > 7))
 236                 skb->priority = cfg80211_classify8021d(skb, NULL);
 237
 238         ret = brcmf_proto_tx_queue_data(drvr, ifp->ifidx, skb);
 239         if (ret < 0)
 240                 brcmf_txfinalize(ifp, skb, false);
 241
 242 done:
 243         if (ret) {
 244                 ndev->stats.tx_dropped++;
 245         } else {
 246                 ndev->stats.tx_packets++;
 247                 ndev->stats.tx_bytes += skb->len;
 248         }
 249
 250         /* Return ok: we always eat the packet */
 251         return NETDEV_TX_OK;
 252 }
 253
 254 void brcmf_txflowblock_if(struct brcmf_if *ifp,
 255                           enum brcmf_netif_stop_reason reason, bool state)
 256 {
 257         unsigned long flags;
 258
 259         if (!ifp || !ifp->ndev)
 260                 return;
 261
 262         brcmf_dbg(TRACE, "enter: bsscfgidx=%d stop=0x%X reason=%d state=%d\n",
 263                   ifp->bsscfgidx, ifp->netif_stop, reason, state);
 264
 265         spin_lock_irqsave(&ifp->netif_stop_lock, flags);
 266         if (state) {
 267                 if (!ifp->netif_stop)
 268                         netif_stop_queue(ifp->ndev);
 269                 ifp->netif_stop |= reason;
 270         } else {
 271                 ifp->netif_stop &= ~reason;
 272                 if (!ifp->netif_stop)
 273                         netif_wake_queue(ifp->ndev);
 274         }
 275         spin_unlock_irqrestore(&ifp->netif_stop_lock, flags);
 276 }
 277
 278 void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb)
 279 {
 280         if (skb->pkt_type == PACKET_MULTICAST)
 281                 ifp->ndev->stats.multicast++;
 282
 283         if (!(ifp->ndev->flags & IFF_UP)) {
 284                 brcmu_pkt_buf_free_skb(skb);
 285                 return;
 286         }
 287
 288         ifp->ndev->stats.rx_bytes += skb->len;
 289         ifp->ndev->stats.rx_packets++;
 290
 291         brcmf_dbg(DATA, "rx proto=0x%X\n", ntohs(skb->protocol));
 292         if (in_interrupt())
 293                 netif_rx(skb);
 294         else
 295                 /* If the receive is not processed inside an ISR,
 296                  * the softirqd must be woken explicitly to service
 297                  * the NET_RX_SOFTIRQ.  This is handled by netif_rx_ni().
 298                  */
 299                 netif_rx_ni(skb);
 300 }
 301
 302 static int brcmf_rx_hdrpull(struct brcmf_pub *drvr, struct sk_buff *skb,
 303                             struct brcmf_if **ifp)
 304 {
 305         int ret;
 306
 307         /* process and remove protocol-specific header */
 308         ret = brcmf_proto_hdrpull(drvr, true, skb, ifp);
 309
 310         if (ret || !(*ifp) || !(*ifp)->ndev) {
 311                 if (ret != -ENODATA && *ifp)
 312                         (*ifp)->ndev->stats.rx_errors++;
 313                 brcmu_pkt_buf_free_skb(skb);
 314                 return -ENODATA;
 315         }
 316
 317         skb->protocol = eth_type_trans(skb, (*ifp)->ndev);
 318         return 0;
 319 }
 320
 321 void brcmf_rx_frame(struct device *dev, struct sk_buff *skb, bool handle_event)
 322 {
 323         struct brcmf_if *ifp;
 324         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 325         struct brcmf_pub *drvr = bus_if->drvr;
 326
 327         brcmf_dbg(DATA, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 328
 329         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 330                 return;
 331
 332         if (brcmf_proto_is_reorder_skb(skb)) {
 333                 brcmf_proto_rxreorder(ifp, skb);
 334         } else {
 335                 /* Process special event packets */
 336                 if (handle_event)
 337                         brcmf_fweh_process_skb(ifp->drvr, skb);
 338
 339                 brcmf_netif_rx(ifp, skb);
 340         }
 341 }
 342
 343 void brcmf_rx_event(struct device *dev, struct sk_buff *skb)
 344 {
 345         struct brcmf_if *ifp;
 346         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 347         struct brcmf_pub *drvr = bus_if->drvr;
 348
 349         brcmf_dbg(EVENT, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 350
 351         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 352                 return;
 353
 354         brcmf_fweh_process_skb(ifp->drvr, skb);
 355         brcmu_pkt_buf_free_skb(skb);
 356 }
 357
 358 void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success)
 359 {
 360         struct ethhdr *eh;
 361         u16 type;
 362
 363         eh = (struct ethhdr *)(txp->data);
 364         type = ntohs(eh->h_proto);
 365
 366         if (type == ETH_P_PAE) {
 367                 atomic_dec(&ifp->pend_8021x_cnt);
 368                 if (waitqueue_active(&ifp->pend_8021x_wait))
 369                         wake_up(&ifp->pend_8021x_wait);
 370         }
 371
 372         if (!success)
 373                 ifp->ndev->stats.tx_errors++;
 374
 375         brcmu_pkt_buf_free_skb(txp);
 376 }
 377
 378 static void brcmf_ethtool_get_drvinfo(struct net_device *ndev,
 379                                     struct ethtool_drvinfo *info)
 380 {
 381         struct brcmf_if *ifp = netdev_priv(ndev);
 382         struct brcmf_pub *drvr = ifp->drvr;
 383         char drev[BRCMU_DOTREV_LEN] = "n/a";
 384
 385         if (drvr->revinfo.result == 0)
 386                 brcmu_dotrev_str(drvr->revinfo.driverrev, drev);
 387         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 388         strlcpy(info->version, drev, sizeof(info->version));
 389         strlcpy(info->fw_version, drvr->fwver, sizeof(info->fw_version));
 390         strlcpy(info->bus_info, dev_name(drvr->bus_if->dev),
 391                 sizeof(info->bus_info));
 392 }
 393
 394 static const struct ethtool_ops brcmf_ethtool_ops = {
 395         .get_drvinfo = brcmf_ethtool_get_drvinfo,
 396 };
 397
 398 static int brcmf_netdev_stop(struct net_device *ndev)
 399 {
 400         struct brcmf_if *ifp = netdev_priv(ndev);
 401
 402         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 403
 404         brcmf_cfg80211_down(ndev);
 405
 406         brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear", NULL, 0);
 407
 408         brcmf_net_setcarrier(ifp, false);
 409
 410         return 0;
 411 }
 412
 413 static int brcmf_netdev_open(struct net_device *ndev)
 414 {
 415         struct brcmf_if *ifp = netdev_priv(ndev);
 416         struct brcmf_pub *drvr = ifp->drvr;
 417         struct brcmf_bus *bus_if = drvr->bus_if;
 418         u32 toe_ol;
 419
 420         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 421
 422         /* If bus is not ready, can't continue */
 423         if (bus_if->state != BRCMF_BUS_UP) {
 424                 brcmf_err("failed bus is not ready\n");
 425                 return -EAGAIN;
 426         }
 427
 428         atomic_set(&ifp->pend_8021x_cnt, 0);
 429
 430         /* Get current TOE mode from dongle */
 431         if (brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_ol) >= 0
 432             && (toe_ol & TOE_TX_CSUM_OL) != 0)
 433                 ndev->features |= NETIF_F_IP_CSUM;
 434         else
 435                 ndev->features &= ~NETIF_F_IP_CSUM;
 436
 437         if (brcmf_cfg80211_up(ndev)) {
 438                 brcmf_err("failed to bring up cfg80211\n");
 439                 return -EIO;
 440         }
 441
 442         /* Clear, carrier, set when connected or AP mode. */
 443         netif_carrier_off(ndev);
 444         return 0;
 445 }
 446
 447 static const struct net_device_ops brcmf_netdev_ops_pri = {
 448         .ndo_open = brcmf_netdev_open,
 449         .ndo_stop = brcmf_netdev_stop,
 450         .ndo_start_xmit = brcmf_netdev_start_xmit,
 451         .ndo_set_mac_address = brcmf_netdev_set_mac_address,
 452         .ndo_set_rx_mode = brcmf_netdev_set_multicast_list
 453 };
 454
 455 int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked)
 456 {
 457         struct brcmf_pub *drvr = ifp->drvr;
 458         struct net_device *ndev;
 459         s32 err;
 460
 461         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 462                   ifp->mac_addr);
 463         ndev = ifp->ndev;
 464
 465         /* set appropriate operations */
 466         ndev->netdev_ops = &brcmf_netdev_ops_pri;
 467
 468         ndev->needed_headroom += drvr->hdrlen;
 469         ndev->ethtool_ops = &brcmf_ethtool_ops;
 470
 471         /* set the mac address & netns */
 472         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 473         dev_net_set(ndev, wiphy_net(cfg_to_wiphy(drvr->config)));
 474
 475         INIT_WORK(&ifp->multicast_work, _brcmf_set_multicast_list);
 476         INIT_WORK(&ifp->ndoffload_work, _brcmf_update_ndtable);
 477
 478         if (rtnl_locked)
 479                 err = register_netdevice(ndev);
 480         else
 481                 err = register_netdev(ndev);
 482         if (err != 0) {
 483                 brcmf_err("couldn't register the net device\n");
 484                 goto fail;
 485         }
 486
 487         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 488         return 0;
 489
 490 fail:
 491         drvr->iflist[ifp->bsscfgidx] = NULL;
 492         ndev->netdev_ops = NULL;
 493         free_netdev(ndev);
 494         return -EBADE;
 495 }
 496
 497 static void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked)
 498 {
 499         if (ndev->reg_state == NETREG_REGISTERED) {
 500                 if (rtnl_locked)
 501                         unregister_netdevice(ndev);
 502                 else
 503                         unregister_netdev(ndev);
 504         } else {
 505                 brcmf_cfg80211_free_netdev(ndev);
 506         }
 507 }
 508
 509 void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on)
 510 {
 511         struct net_device *ndev;
 512
 513         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d carrier=%d\n", ifp->bsscfgidx,
 514                   on);
 515
 516         ndev = ifp->ndev;
 517         brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_DISCONNECTED, !on);
 518         if (on) {
 519                 if (!netif_carrier_ok(ndev))
 520                         netif_carrier_on(ndev);
 521
 522         } else {
 523                 if (netif_carrier_ok(ndev))
 524                         netif_carrier_off(ndev);
 525         }
 526 }
 527
 528 static int brcmf_net_p2p_open(struct net_device *ndev)
 529 {
 530         brcmf_dbg(TRACE, "Enter\n");
 531
 532         return brcmf_cfg80211_up(ndev);
 533 }
 534
 535 static int brcmf_net_p2p_stop(struct net_device *ndev)
 536 {
 537         brcmf_dbg(TRACE, "Enter\n");
 538
 539         return brcmf_cfg80211_down(ndev);
 540 }
 541
 542 static netdev_tx_t brcmf_net_p2p_start_xmit(struct sk_buff *skb,
 543                                             struct net_device *ndev)
 544 {
 545         if (skb)
 546                 dev_kfree_skb_any(skb);
 547
 548         return NETDEV_TX_OK;
 549 }
 550
 551 static const struct net_device_ops brcmf_netdev_ops_p2p = {
 552         .ndo_open = brcmf_net_p2p_open,
 553         .ndo_stop = brcmf_net_p2p_stop,
 554         .ndo_start_xmit = brcmf_net_p2p_start_xmit
 555 };
 556
 557 static int brcmf_net_p2p_attach(struct brcmf_if *ifp)
 558 {
 559         struct net_device *ndev;
 560
 561         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 562                   ifp->mac_addr);
 563         ndev = ifp->ndev;
 564
 565         ndev->netdev_ops = &brcmf_netdev_ops_p2p;
 566
 567         /* set the mac address */
 568         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 569
 570         if (register_netdev(ndev) != 0) {
 571                 brcmf_err("couldn't register the p2p net device\n");
 572                 goto fail;
 573         }
 574
 575         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 576
 577         return 0;
 578
 579 fail:
 580         ifp->drvr->iflist[ifp->bsscfgidx] = NULL;
 581         ndev->netdev_ops = NULL;
 582         free_netdev(ndev);
 583         return -EBADE;
 584 }
 585
 586 struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bsscfgidx, s32 ifidx,
 587                               bool is_p2pdev, const char *name, u8 *mac_addr)
 588 {
 589         struct brcmf_if *ifp;
 590         struct net_device *ndev;
 591
 592         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx, ifidx);
 593
 594         ifp = drvr->iflist[bsscfgidx];
 595         /*
 596          * Delete the existing interface before overwriting it
 597          * in case we missed the BRCMF_E_IF_DEL event.
 598          */
 599         if (ifp) {
 600                 if (ifidx) {
 601                         brcmf_err("ERROR: netdev:%s already exists\n",
 602                                   ifp->ndev->name);
 603                         netif_stop_queue(ifp->ndev);
 604                         brcmf_net_detach(ifp->ndev, false);
 605                         drvr->iflist[bsscfgidx] = NULL;
 606                 } else {
 607                         brcmf_dbg(INFO, "netdev:%s ignore IF event\n",
 608                                   ifp->ndev->name);
 609                         return ERR_PTR(-EINVAL);
 610                 }
 611         }
 612
 613         if (!drvr->settings->p2p_enable && is_p2pdev) {
 614                 /* this is P2P_DEVICE interface */
 615                 brcmf_dbg(INFO, "allocate non-netdev interface\n");
 616                 ifp = kzalloc(sizeof(*ifp), GFP_KERNEL);
 617                 if (!ifp)
 618                         return ERR_PTR(-ENOMEM);
 619         } else {
 620                 brcmf_dbg(INFO, "allocate netdev interface\n");
 621                 /* Allocate netdev, including space for private structure */
 622                 ndev = alloc_netdev(sizeof(*ifp), is_p2pdev ? "p2p%d" : name,
 623                                     NET_NAME_UNKNOWN, ether_setup);
 624                 if (!ndev)
 625                         return ERR_PTR(-ENOMEM);
 626
 627                 ndev->needs_free_netdev = true;
 628                 ndev->priv_destructor = brcmf_cfg80211_free_netdev;
 629                 ifp = netdev_priv(ndev);
 630                 ifp->ndev = ndev;
 631                 /* store mapping ifidx to bsscfgidx */
 632                 if (drvr->if2bss[ifidx] == BRCMF_BSSIDX_INVALID)
 633                         drvr->if2bss[ifidx] = bsscfgidx;
 634         }
 635
 636         ifp->drvr = drvr;
 637         drvr->iflist[bsscfgidx] = ifp;
 638         ifp->ifidx = ifidx;
 639         ifp->bsscfgidx = bsscfgidx;
 640
 641         init_waitqueue_head(&ifp->pend_8021x_wait);
 642         spin_lock_init(&ifp->netif_stop_lock);
 643
 644         if (mac_addr != NULL)
 645                 memcpy(ifp->mac_addr, mac_addr, ETH_ALEN);
 646
 647         brcmf_dbg(TRACE, " ==== pid:%x, if:%s (%pM) created ===\n",
 648                   current->pid, name, ifp->mac_addr);
 649
 650         return ifp;
 651 }
 652
 653 static void brcmf_del_if(struct brcmf_pub *drvr, s32 bsscfgidx,
 654                          bool rtnl_locked)
 655 {
 656         struct brcmf_if *ifp;
 657
 658         ifp = drvr->iflist[bsscfgidx];
 659         drvr->iflist[bsscfgidx] = NULL;
 660         if (!ifp) {
 661                 brcmf_err("Null interface, bsscfgidx=%d\n", bsscfgidx);
 662                 return;
 663         }
 664         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx,
 665                   ifp->ifidx);
 666         if (drvr->if2bss[ifp->ifidx] == bsscfgidx)
 667                 drvr->if2bss[ifp->ifidx] = BRCMF_BSSIDX_INVALID;
 668         if (ifp->ndev) {
 669                 if (bsscfgidx == 0) {
 670                         if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 671                                 rtnl_lock();
 672                                 brcmf_netdev_stop(ifp->ndev);
 673                                 rtnl_unlock();
 674                         }
 675                 } else {
 676                         netif_stop_queue(ifp->ndev);
 677                 }
 678
 679                 if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 680                         cancel_work_sync(&ifp->multicast_work);
 681                         cancel_work_sync(&ifp->ndoffload_work);
 682                 }
 683                 brcmf_net_detach(ifp->ndev, rtnl_locked);
 684         } else {
 685                 /* Only p2p device interfaces which get dynamically created
 686                  * end up here. In this case the p2p module should be informed
 687                  * about the removal of the interface within the firmware. If
 688                  * not then p2p commands towards the firmware will cause some
 689                  * serious troublesome side effects. The p2p module will clean
 690                  * up the ifp if needed.
 691                  */
 692                 brcmf_p2p_ifp_removed(ifp, rtnl_locked);
 693                 kfree(ifp);
 694         }
 695 }
 696
 697 void brcmf_remove_interface(struct brcmf_if *ifp, bool rtnl_locked)
 698 {
 699         if (!ifp || WARN_ON(ifp->drvr->iflist[ifp->bsscfgidx] != ifp))
 700                 return;
 701         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", ifp->bsscfgidx,
 702                   ifp->ifidx);
 703         brcmf_proto_del_if(ifp->drvr, ifp);
 704         brcmf_del_if(ifp->drvr, ifp->bsscfgidx, rtnl_locked);
 705 }
 706
 707 static int brcmf_psm_watchdog_notify(struct brcmf_if *ifp,
 708                                      const struct brcmf_event_msg *evtmsg,
 709                                      void *data)
 710 {
 711         int err;
 712
 713         brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
 714
 715         brcmf_err("PSM's watchdog has fired!\n");
 716
 717         err = brcmf_debug_create_memdump(ifp->drvr->bus_if, data,
 718                                          evtmsg->datalen);
 719         if (err)
 720                 brcmf_err("Failed to get memory dump, %d\n", err);
 721
 722         return err;
 723 }
 724
 725 #ifdef CONFIG_INET
 726 #define ARPOL_MAX_ENTRIES       8
 727 static int brcmf_inetaddr_changed(struct notifier_block *nb,
 728                                   unsigned long action, void *data)
 729 {
 730         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 731                                               inetaddr_notifier);
 732         struct in_ifaddr *ifa = data;
 733         struct net_device *ndev = ifa->ifa_dev->dev;
 734         struct brcmf_if *ifp;
 735         int idx, i, ret;
 736         u32 val;
 737         __be32 addr_table[ARPOL_MAX_ENTRIES] = {0};
 738
 739         /* Find out if the notification is meant for us */
 740         for (idx = 0; idx < BRCMF_MAX_IFS; idx++) {
 741                 ifp = drvr->iflist[idx];
 742                 if (ifp && ifp->ndev == ndev)
 743                         break;
 744                 if (idx == BRCMF_MAX_IFS - 1)
 745                         return NOTIFY_DONE;
 746         }
 747
 748         /* check if arp offload is supported */
 749         ret = brcmf_fil_iovar_int_get(ifp, "arpoe", &val);
 750         if (ret)
 751                 return NOTIFY_OK;
 752
 753         /* old version only support primary index */
 754         ret = brcmf_fil_iovar_int_get(ifp, "arp_version", &val);
 755         if (ret)
 756                 val = 1;
 757         if (val == 1)
 758                 ifp = drvr->iflist[0];
 759
 760         /* retrieve the table from firmware */
 761         ret = brcmf_fil_iovar_data_get(ifp, "arp_hostip", addr_table,
 762                                        sizeof(addr_table));
 763         if (ret) {
 764                 brcmf_err("fail to get arp ip table err:%d\n", ret);
 765                 return NOTIFY_OK;
 766         }
 767
 768         for (i = 0; i < ARPOL_MAX_ENTRIES; i++)
 769                 if (ifa->ifa_address == addr_table[i])
 770                         break;
 771
 772         switch (action) {
 773         case NETDEV_UP:
 774                 if (i == ARPOL_MAX_ENTRIES) {
 775                         brcmf_dbg(TRACE, "add %pI4 to arp table\n",
 776                                   &ifa->ifa_address);
 777                         /* set it directly */
 778                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 779                                 &ifa->ifa_address, sizeof(ifa->ifa_address));
 780                         if (ret)
 781                                 brcmf_err("add arp ip err %d\n", ret);
 782                 }
 783                 break;
 784         case NETDEV_DOWN:
 785                 if (i < ARPOL_MAX_ENTRIES) {
 786                         addr_table[i] = 0;
 787                         brcmf_dbg(TRACE, "remove %pI4 from arp table\n",
 788                                   &ifa->ifa_address);
 789                         /* clear the table in firmware */
 790                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear",
 791                                                        NULL, 0);
 792                         if (ret) {
 793                                 brcmf_err("fail to clear arp ip table err:%d\n",
 794                                           ret);
 795                                 return NOTIFY_OK;
 796                         }
 797                         for (i = 0; i < ARPOL_MAX_ENTRIES; i++) {
 798                                 if (addr_table[i] == 0)
 799                                         continue;
 800                                 ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 801                                                                &addr_table[i],
 802                                                                sizeof(addr_table[i]));
 803                                 if (ret)
 804                                         brcmf_err("add arp ip err %d\n",
 805                                                   ret);
 806                         }
 807                 }
 808                 break;
 809         default:
 810                 break;
 811         }
 812
 813         return NOTIFY_OK;
 814 }
 815 #endif
 816
 817 #if IS_ENABLED(CONFIG_IPV6)
 818 static int brcmf_inet6addr_changed(struct notifier_block *nb,
 819                                    unsigned long action, void *data)
 820 {
 821         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 822                                               inet6addr_notifier);
 823         struct inet6_ifaddr *ifa = data;
 824         struct brcmf_if *ifp;
 825         int i;
 826         struct in6_addr *table;
 827
 828         /* Only handle primary interface */
 829         ifp = drvr->iflist[0];
 830         if (!ifp)
 831                 return NOTIFY_DONE;
 832         if (ifp->ndev != ifa->idev->dev)
 833                 return NOTIFY_DONE;
 834
 835         table = ifp->ipv6_addr_tbl;
 836         for (i = 0; i < NDOL_MAX_ENTRIES; i++)
 837                 if (ipv6_addr_equal(&ifa->addr, &table[i]))
 838                         break;
 839
 840         switch (action) {
 841         case NETDEV_UP:
 842                 if (i == NDOL_MAX_ENTRIES) {
 843                         if (ifp->ipv6addr_idx < NDOL_MAX_ENTRIES) {
 844                                 table[ifp->ipv6addr_idx++] = ifa->addr;
 845                         } else {
 846                                 for (i = 0; i < NDOL_MAX_ENTRIES - 1; i++)
 847                                         table[i] = table[i + 1];
 848                                 table[NDOL_MAX_ENTRIES - 1] = ifa->addr;
 849                         }
 850                 }
 851                 break;
 852         case NETDEV_DOWN:
 853                 if (i < NDOL_MAX_ENTRIES) {
 854                         for (; i < ifp->ipv6addr_idx - 1; i++)
 855                                 table[i] = table[i + 1];
 856                         memset(&table[i], 0, sizeof(table[i]));
 857                         ifp->ipv6addr_idx--;
 858                 }
 859                 break;
 860         default:
 861                 break;
 862         }
 863
 864         schedule_work(&ifp->ndoffload_work);
 865
 866         return NOTIFY_OK;
 867 }
 868 #endif
 869
 870 int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 871 {
 872         struct brcmf_pub *drvr = NULL;
 873         int ret = 0;
 874         int i;
 875
 876         brcmf_dbg(TRACE, "Enter\n");
 877
 878         /* Allocate primary brcmf_info */
 879         drvr = kzalloc(sizeof(struct brcmf_pub), GFP_ATOMIC);
 880         if (!drvr)
 881                 return -ENOMEM;
 882
 883         for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
 884                 drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
 885
 886         mutex_init(&drvr->proto_block);
 887
 888         /* Link to bus module */
 889         drvr->hdrlen = 0;
 890         drvr->bus_if = dev_get_drvdata(dev);
 891         drvr->bus_if->drvr = drvr;
 892         drvr->settings = settings;
 893
 894         /* attach debug facilities */
 895         brcmf_debug_attach(drvr);
 896
 897         /* Attach and link in the protocol */
 898         ret = brcmf_proto_attach(drvr);
 899         if (ret != 0) {
 900                 brcmf_err("brcmf_prot_attach failed\n");
 901                 goto fail;
 902         }
 903
 904         /* Attach to events important for core code */
 905         brcmf_fweh_register(drvr, BRCMF_E_PSM_WATCHDOG,
 906                             brcmf_psm_watchdog_notify);
 907
 908         /* attach firmware event handler */
 909         brcmf_fweh_attach(drvr);
 910
 911         return ret;
 912
 913 fail:
 914         brcmf_detach(dev);
 915
 916         return ret;
 917 }
 918
 919 static int brcmf_revinfo_read(struct seq_file *s, void *data)
 920 {
 921         struct brcmf_bus *bus_if = dev_get_drvdata(s->private);
 922         struct brcmf_rev_info *ri = &bus_if->drvr->revinfo;
 923         char drev[BRCMU_DOTREV_LEN];
 924         char brev[BRCMU_BOARDREV_LEN];
 925
 926         seq_printf(s, "vendorid: 0x%04x\n", ri->vendorid);
 927         seq_printf(s, "deviceid: 0x%04x\n", ri->deviceid);
 928         seq_printf(s, "radiorev: %s\n", brcmu_dotrev_str(ri->radiorev, drev));
 929         seq_printf(s, "chipnum: %u (%x)\n", ri->chipnum, ri->chipnum);
 930         seq_printf(s, "chiprev: %u\n", ri->chiprev);
 931         seq_printf(s, "chippkg: %u\n", ri->chippkg);
 932         seq_printf(s, "corerev: %u\n", ri->corerev);
 933         seq_printf(s, "boardid: 0x%04x\n", ri->boardid);
 934         seq_printf(s, "boardvendor: 0x%04x\n", ri->boardvendor);
 935         seq_printf(s, "boardrev: %s\n", brcmu_boardrev_str(ri->boardrev, brev));
 936         seq_printf(s, "driverrev: %s\n", brcmu_dotrev_str(ri->driverrev, drev));
 937         seq_printf(s, "ucoderev: %u\n", ri->ucoderev);
 938         seq_printf(s, "bus: %u\n", ri->bus);
 939         seq_printf(s, "phytype: %u\n", ri->phytype);
 940         seq_printf(s, "phyrev: %u\n", ri->phyrev);
 941         seq_printf(s, "anarev: %u\n", ri->anarev);
 942         seq_printf(s, "nvramrev: %08x\n", ri->nvramrev);
 943
 944         return 0;
 945 }
 946
 947 int brcmf_bus_started(struct device *dev)
 948 {
 949         int ret = -1;
 950         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 951         struct brcmf_pub *drvr = bus_if->drvr;
 952         struct brcmf_if *ifp;
 953         struct brcmf_if *p2p_ifp;
 954
 955         brcmf_dbg(TRACE, "\n");
 956
 957         /* add primary networking interface */
 958         ifp = brcmf_add_if(drvr, 0, 0, false, "wlan%d", NULL);
 959         if (IS_ERR(ifp))
 960                 return PTR_ERR(ifp);
 961
 962         p2p_ifp = NULL;
 963
 964         /* signal bus ready */
 965         brcmf_bus_change_state(bus_if, BRCMF_BUS_UP);
 966
 967         /* Bus is ready, do any initialization */
 968         ret = brcmf_c_preinit_dcmds(ifp);
 969         if (ret < 0)
 970                 goto fail;
 971
 972         brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
 973
 974         /* assure we have chipid before feature attach */
 975         if (!bus_if->chip) {
 976                 bus_if->chip = drvr->revinfo.chipnum;
 977                 bus_if->chiprev = drvr->revinfo.chiprev;
 978                 brcmf_dbg(INFO, "firmware revinfo: chip %x (%d) rev %d\n",
 979                           bus_if->chip, bus_if->chip, bus_if->chiprev);
 980         }
 981         brcmf_feat_attach(drvr);
 982
 983         ret = brcmf_proto_init_done(drvr);
 984         if (ret < 0)
 985                 goto fail;
 986
 987         brcmf_proto_add_if(drvr, ifp);
 988
 989         drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev,
 990                                              drvr->settings->p2p_enable);
 991         if (drvr->config == NULL) {
 992                 ret = -ENOMEM;
 993                 goto fail;
 994         }
 995
 996         ret = brcmf_net_attach(ifp, false);
 997
 998         if ((!ret) && (drvr->settings->p2p_enable)) {
 999                 p2p_ifp = drvr->iflist[1];
1000                 if (p2p_ifp)
1001                         ret = brcmf_net_p2p_attach(p2p_ifp);
1002         }
1003
1004         if (ret)
1005                 goto fail;
1006
1007 #ifdef CONFIG_INET
1008         drvr->inetaddr_notifier.notifier_call = brcmf_inetaddr_changed;
1009         ret = register_inetaddr_notifier(&drvr->inetaddr_notifier);
1010         if (ret)
1011                 goto fail;
1012
1013 #if IS_ENABLED(CONFIG_IPV6)
1014         drvr->inet6addr_notifier.notifier_call = brcmf_inet6addr_changed;
1015         ret = register_inet6addr_notifier(&drvr->inet6addr_notifier);
1016         if (ret) {
1017                 unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1018                 goto fail;
1019         }
1020 #endif
1021 #endif /* CONFIG_INET */
1022
1023         return 0;
1024
1025 fail:
1026         brcmf_err("failed: %d\n", ret);
1027         if (drvr->config) {
1028                 brcmf_cfg80211_detach(drvr->config);
1029                 drvr->config = NULL;
1030         }
1031         brcmf_net_detach(ifp->ndev, false);
1032         if (p2p_ifp)
1033                 brcmf_net_detach(p2p_ifp->ndev, false);
1034         drvr->iflist[0] = NULL;
1035         drvr->iflist[1] = NULL;
1036         if (drvr->settings->ignore_probe_fail)
1037                 ret = 0;
1038
1039         return ret;
1040 }
1041
1042 void brcmf_bus_add_txhdrlen(struct device *dev, uint len)
1043 {
1044         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1045         struct brcmf_pub *drvr = bus_if->drvr;
1046
1047         if (drvr) {
1048                 drvr->hdrlen += len;
1049         }
1050 }
1051
1052 void brcmf_dev_reset(struct device *dev)
1053 {
1054         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1055         struct brcmf_pub *drvr = bus_if->drvr;
1056
1057         if (drvr == NULL)
1058                 return;
1059
1060         if (drvr->iflist[0])
1061                 brcmf_fil_cmd_int_set(drvr->iflist[0], BRCMF_C_TERMINATED, 1);
1062 }
1063
1064 void brcmf_detach(struct device *dev)
1065 {
1066         s32 i;
1067         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1068         struct brcmf_pub *drvr = bus_if->drvr;
1069
1070         brcmf_dbg(TRACE, "Enter\n");
1071
1072         if (drvr == NULL)
1073                 return;
1074
1075 #ifdef CONFIG_INET
1076         unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1077 #endif
1078
1079 #if IS_ENABLED(CONFIG_IPV6)
1080         unregister_inet6addr_notifier(&drvr->inet6addr_notifier);
1081 #endif
1082
1083         /* stop firmware event handling */
1084         brcmf_fweh_detach(drvr);
1085         if (drvr->config)
1086                 brcmf_p2p_detach(&drvr->config->p2p);
1087
1088         brcmf_bus_change_state(bus_if, BRCMF_BUS_DOWN);
1089
1090         /* make sure primary interface removed last */
1091         for (i = BRCMF_MAX_IFS-1; i > -1; i--)
1092                 brcmf_remove_interface(drvr->iflist[i], false);
1093
1094         brcmf_cfg80211_detach(drvr->config);
1095
1096         brcmf_bus_stop(drvr->bus_if);
1097
1098         brcmf_proto_detach(drvr);
1099
1100         brcmf_debug_detach(drvr);
1101         bus_if->drvr = NULL;
1102         kfree(drvr);
1103 }
1104
1105 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len)
1106 {
1107         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1108         struct brcmf_if *ifp = bus_if->drvr->iflist[0];
1109
1110         return brcmf_fil_iovar_data_set(ifp, name, data, len);
1111 }
1112
1113 static int brcmf_get_pend_8021x_cnt(struct brcmf_if *ifp)
1114 {
1115         return atomic_read(&ifp->pend_8021x_cnt);
1116 }
1117
1118 int brcmf_netdev_wait_pend8021x(struct brcmf_if *ifp)
1119 {
1120         int err;
1121
1122         err = wait_event_timeout(ifp->pend_8021x_wait,
1123                                  !brcmf_get_pend_8021x_cnt(ifp),
1124                                  MAX_WAIT_FOR_8021X_TX);
1125
1126         if (!err)
1127                 brcmf_err("Timed out waiting for no pending 802.1x packets\n");
1128
1129         return !err;
1130 }
1131
1132 void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state)
1133 {
1134         struct brcmf_pub *drvr = bus->drvr;
1135         struct net_device *ndev;
1136         int ifidx;
1137
1138         brcmf_dbg(TRACE, "%d -> %d\n", bus->state, state);
1139         bus->state = state;
1140
1141         if (state == BRCMF_BUS_UP) {
1142                 for (ifidx = 0; ifidx < BRCMF_MAX_IFS; ifidx++) {
1143                         if ((drvr->iflist[ifidx]) &&
1144                             (drvr->iflist[ifidx]->ndev)) {
1145                                 ndev = drvr->iflist[ifidx]->ndev;
1146                                 if (netif_queue_stopped(ndev))
1147                                         netif_wake_queue(ndev);
1148                         }
1149                 }
1150         }
1151 }
1152
1153 static void brcmf_driver_register(struct work_struct *work)
1154 {
1155 #ifdef CONFIG_BRCMFMAC_SDIO
1156         brcmf_sdio_register();
1157 #endif
1158 #ifdef CONFIG_BRCMFMAC_USB
1159         brcmf_usb_register();
1160 #endif
1161 #ifdef CONFIG_BRCMFMAC_PCIE
1162         brcmf_pcie_register();
1163 #endif
1164 }
1165 static DECLARE_WORK(brcmf_driver_work, brcmf_driver_register);
1166
1167 int __init brcmf_core_init(void)
1168 {
1169         if (!schedule_work(&brcmf_driver_work))
1170                 return -EBUSY;
1171
1172         return 0;
1173 }
1174
1175 void __exit brcmf_core_exit(void)
1176 {
1177         cancel_work_sync(&brcmf_driver_work);
1178
1179 #ifdef CONFIG_BRCMFMAC_SDIO
1180         brcmf_sdio_exit();
1181 #endif
1182 #ifdef CONFIG_BRCMFMAC_USB
1183         brcmf_usb_exit();
1184 #endif
1185 #ifdef CONFIG_BRCMFMAC_PCIE
1186         brcmf_pcie_exit();
1187 #endif
1188 }
1189