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 "fwsignal.h"
  36 #include "feature.h"
  37 #include "proto.h"
  38 #include "pcie.h"
  39 #include "common.h"
  40
  41 #define MAX_WAIT_FOR_8021X_TX                   msecs_to_jiffies(950)
  42
  43 #define BRCMF_BSSIDX_INVALID                    -1
  44
  45 char *brcmf_ifname(struct brcmf_if *ifp)
  46 {
  47         if (!ifp)
  48                 return "<if_null>";
  49
  50         if (ifp->ndev)
  51                 return ifp->ndev->name;
  52
  53         return "<if_none>";
  54 }
  55
  56 struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx)
  57 {
  58         struct brcmf_if *ifp;
  59         s32 bsscfgidx;
  60
  61         if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) {
  62                 brcmf_err("ifidx %d out of range\n", ifidx);
  63                 return NULL;
  64         }
  65
  66         ifp = NULL;
  67         bsscfgidx = drvr->if2bss[ifidx];
  68         if (bsscfgidx >= 0)
  69                 ifp = drvr->iflist[bsscfgidx];
  70
  71         return ifp;
  72 }
  73
  74 static void _brcmf_set_multicast_list(struct work_struct *work)
  75 {
  76         struct brcmf_if *ifp;
  77         struct net_device *ndev;
  78         struct netdev_hw_addr *ha;
  79         u32 cmd_value, cnt;
  80         __le32 cnt_le;
  81         char *buf, *bufp;
  82         u32 buflen;
  83         s32 err;
  84
  85         ifp = container_of(work, struct brcmf_if, multicast_work);
  86
  87         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
  88
  89         ndev = ifp->ndev;
  90
  91         /* Determine initial value of allmulti flag */
  92         cmd_value = (ndev->flags & IFF_ALLMULTI) ? true : false;
  93
  94         /* Send down the multicast list first. */
  95         cnt = netdev_mc_count(ndev);
  96         buflen = sizeof(cnt) + (cnt * ETH_ALEN);
  97         buf = kmalloc(buflen, GFP_ATOMIC);
  98         if (!buf)
  99                 return;
 100         bufp = buf;
 101
 102         cnt_le = cpu_to_le32(cnt);
 103         memcpy(bufp, &cnt_le, sizeof(cnt_le));
 104         bufp += sizeof(cnt_le);
 105
 106         netdev_for_each_mc_addr(ha, ndev) {
 107                 if (!cnt)
 108                         break;
 109                 memcpy(bufp, ha->addr, ETH_ALEN);
 110                 bufp += ETH_ALEN;
 111                 cnt--;
 112         }
 113
 114         err = brcmf_fil_iovar_data_set(ifp, "mcast_list", buf, buflen);
 115         if (err < 0) {
 116                 brcmf_err("Setting mcast_list failed, %d\n", err);
 117                 cmd_value = cnt ? true : cmd_value;
 118         }
 119
 120         kfree(buf);
 121
 122         /*
 123          * Now send the allmulti setting.  This is based on the setting in the
 124          * net_device flags, but might be modified above to be turned on if we
 125          * were trying to set some addresses and dongle rejected it...
 126          */
 127         err = brcmf_fil_iovar_int_set(ifp, "allmulti", cmd_value);
 128         if (err < 0)
 129                 brcmf_err("Setting allmulti failed, %d\n", err);
 130
 131         /*Finally, pick up the PROMISC flag */
 132         cmd_value = (ndev->flags & IFF_PROMISC) ? true : false;
 133         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PROMISC, cmd_value);
 134         if (err < 0)
 135                 brcmf_err("Setting BRCMF_C_SET_PROMISC failed, %d\n",
 136                           err);
 137 }
 138
 139 #if IS_ENABLED(CONFIG_IPV6)
 140 static void _brcmf_update_ndtable(struct work_struct *work)
 141 {
 142         struct brcmf_if *ifp;
 143         int i, ret;
 144
 145         ifp = container_of(work, struct brcmf_if, ndoffload_work);
 146
 147         /* clear the table in firmware */
 148         ret = brcmf_fil_iovar_data_set(ifp, "nd_hostip_clear", NULL, 0);
 149         if (ret) {
 150                 brcmf_dbg(TRACE, "fail to clear nd ip table err:%d\n", ret);
 151                 return;
 152         }
 153
 154         for (i = 0; i < ifp->ipv6addr_idx; i++) {
 155                 ret = brcmf_fil_iovar_data_set(ifp, "nd_hostip",
 156                                                &ifp->ipv6_addr_tbl[i],
 157                                                sizeof(struct in6_addr));
 158                 if (ret)
 159                         brcmf_err("add nd ip err %d\n", ret);
 160         }
 161 }
 162 #else
 163 static void _brcmf_update_ndtable(struct work_struct *work)
 164 {
 165 }
 166 #endif
 167
 168 static int brcmf_netdev_set_mac_address(struct net_device *ndev, void *addr)
 169 {
 170         struct brcmf_if *ifp = netdev_priv(ndev);
 171         struct sockaddr *sa = (struct sockaddr *)addr;
 172         int err;
 173
 174         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 175
 176         err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", sa->sa_data,
 177                                        ETH_ALEN);
 178         if (err < 0) {
 179                 brcmf_err("Setting cur_etheraddr failed, %d\n", err);
 180         } else {
 181                 brcmf_dbg(TRACE, "updated to %pM\n", sa->sa_data);
 182                 memcpy(ifp->mac_addr, sa->sa_data, ETH_ALEN);
 183                 memcpy(ifp->ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 184         }
 185         return err;
 186 }
 187
 188 static void brcmf_netdev_set_multicast_list(struct net_device *ndev)
 189 {
 190         struct brcmf_if *ifp = netdev_priv(ndev);
 191
 192         schedule_work(&ifp->multicast_work);
 193 }
 194
 195 static netdev_tx_t brcmf_netdev_start_xmit(struct sk_buff *skb,
 196                                            struct net_device *ndev)
 197 {
 198         int ret;
 199         struct brcmf_if *ifp = netdev_priv(ndev);
 200         struct brcmf_pub *drvr = ifp->drvr;
 201         struct ethhdr *eh = (struct ethhdr *)(skb->data);
 202
 203         brcmf_dbg(DATA, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 204
 205         /* Can the device send data? */
 206         if (drvr->bus_if->state != BRCMF_BUS_UP) {
 207                 brcmf_err("xmit rejected state=%d\n", drvr->bus_if->state);
 208                 netif_stop_queue(ndev);
 209                 dev_kfree_skb(skb);
 210                 ret = -ENODEV;
 211                 goto done;
 212         }
 213
 214         /* Make sure there's enough room for any header */
 215         if (skb_headroom(skb) < drvr->hdrlen) {
 216                 struct sk_buff *skb2;
 217
 218                 brcmf_dbg(INFO, "%s: insufficient headroom\n",
 219                           brcmf_ifname(ifp));
 220                 drvr->bus_if->tx_realloc++;
 221                 skb2 = skb_realloc_headroom(skb, drvr->hdrlen);
 222                 dev_kfree_skb(skb);
 223                 skb = skb2;
 224                 if (skb == NULL) {
 225                         brcmf_err("%s: skb_realloc_headroom failed\n",
 226                                   brcmf_ifname(ifp));
 227                         ret = -ENOMEM;
 228                         goto done;
 229                 }
 230         }
 231
 232         /* validate length for ether packet */
 233         if (skb->len < sizeof(*eh)) {
 234                 ret = -EINVAL;
 235                 dev_kfree_skb(skb);
 236                 goto done;
 237         }
 238
 239         if (eh->h_proto == htons(ETH_P_PAE))
 240                 atomic_inc(&ifp->pend_8021x_cnt);
 241
 242         /* determine the priority */
 243         if ((skb->priority == 0) || (skb->priority > 7))
 244                 skb->priority = cfg80211_classify8021d(skb, NULL);
 245
 246         ret = brcmf_proto_tx_queue_data(drvr, ifp->ifidx, skb);
 247         if (ret < 0)
 248                 brcmf_txfinalize(ifp, skb, false);
 249
 250 done:
 251         if (ret) {
 252                 ndev->stats.tx_dropped++;
 253         } else {
 254                 ndev->stats.tx_packets++;
 255                 ndev->stats.tx_bytes += skb->len;
 256         }
 257
 258         /* Return ok: we always eat the packet */
 259         return NETDEV_TX_OK;
 260 }
 261
 262 void brcmf_txflowblock_if(struct brcmf_if *ifp,
 263                           enum brcmf_netif_stop_reason reason, bool state)
 264 {
 265         unsigned long flags;
 266
 267         if (!ifp || !ifp->ndev)
 268                 return;
 269
 270         brcmf_dbg(TRACE, "enter: bsscfgidx=%d stop=0x%X reason=%d state=%d\n",
 271                   ifp->bsscfgidx, ifp->netif_stop, reason, state);
 272
 273         spin_lock_irqsave(&ifp->netif_stop_lock, flags);
 274         if (state) {
 275                 if (!ifp->netif_stop)
 276                         netif_stop_queue(ifp->ndev);
 277                 ifp->netif_stop |= reason;
 278         } else {
 279                 ifp->netif_stop &= ~reason;
 280                 if (!ifp->netif_stop)
 281                         netif_wake_queue(ifp->ndev);
 282         }
 283         spin_unlock_irqrestore(&ifp->netif_stop_lock, flags);
 284 }
 285
 286 void brcmf_txflowblock(struct device *dev, bool state)
 287 {
 288         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 289         struct brcmf_pub *drvr = bus_if->drvr;
 290
 291         brcmf_dbg(TRACE, "Enter\n");
 292
 293         brcmf_fws_bus_blocked(drvr, state);
 294 }
 295
 296 void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb)
 297 {
 298         if (skb->pkt_type == PACKET_MULTICAST)
 299                 ifp->ndev->stats.multicast++;
 300
 301         if (!(ifp->ndev->flags & IFF_UP)) {
 302                 brcmu_pkt_buf_free_skb(skb);
 303                 return;
 304         }
 305
 306         ifp->ndev->stats.rx_bytes += skb->len;
 307         ifp->ndev->stats.rx_packets++;
 308
 309         brcmf_dbg(DATA, "rx proto=0x%X\n", ntohs(skb->protocol));
 310         if (in_interrupt())
 311                 netif_rx(skb);
 312         else
 313                 /* If the receive is not processed inside an ISR,
 314                  * the softirqd must be woken explicitly to service
 315                  * the NET_RX_SOFTIRQ.  This is handled by netif_rx_ni().
 316                  */
 317                 netif_rx_ni(skb);
 318 }
 319
 320 static int brcmf_rx_hdrpull(struct brcmf_pub *drvr, struct sk_buff *skb,
 321                             struct brcmf_if **ifp)
 322 {
 323         int ret;
 324
 325         /* process and remove protocol-specific header */
 326         ret = brcmf_proto_hdrpull(drvr, true, skb, ifp);
 327
 328         if (ret || !(*ifp) || !(*ifp)->ndev) {
 329                 if (ret != -ENODATA && *ifp)
 330                         (*ifp)->ndev->stats.rx_errors++;
 331                 brcmu_pkt_buf_free_skb(skb);
 332                 return -ENODATA;
 333         }
 334
 335         skb->protocol = eth_type_trans(skb, (*ifp)->ndev);
 336         return 0;
 337 }
 338
 339 void brcmf_rx_frame(struct device *dev, struct sk_buff *skb, bool handle_event)
 340 {
 341         struct brcmf_if *ifp;
 342         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 343         struct brcmf_pub *drvr = bus_if->drvr;
 344
 345         brcmf_dbg(DATA, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 346
 347         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 348                 return;
 349
 350         if (brcmf_proto_is_reorder_skb(skb)) {
 351                 brcmf_proto_rxreorder(ifp, skb);
 352         } else {
 353                 /* Process special event packets */
 354                 if (handle_event)
 355                         brcmf_fweh_process_skb(ifp->drvr, skb);
 356
 357                 brcmf_netif_rx(ifp, skb);
 358         }
 359 }
 360
 361 void brcmf_rx_event(struct device *dev, struct sk_buff *skb)
 362 {
 363         struct brcmf_if *ifp;
 364         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 365         struct brcmf_pub *drvr = bus_if->drvr;
 366
 367         brcmf_dbg(EVENT, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 368
 369         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 370                 return;
 371
 372         brcmf_fweh_process_skb(ifp->drvr, skb);
 373         brcmu_pkt_buf_free_skb(skb);
 374 }
 375
 376 void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success)
 377 {
 378         struct ethhdr *eh;
 379         u16 type;
 380
 381         eh = (struct ethhdr *)(txp->data);
 382         type = ntohs(eh->h_proto);
 383
 384         if (type == ETH_P_PAE) {
 385                 atomic_dec(&ifp->pend_8021x_cnt);
 386                 if (waitqueue_active(&ifp->pend_8021x_wait))
 387                         wake_up(&ifp->pend_8021x_wait);
 388         }
 389
 390         if (!success)
 391                 ifp->ndev->stats.tx_errors++;
 392
 393         brcmu_pkt_buf_free_skb(txp);
 394 }
 395
 396 void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success)
 397 {
 398         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 399         struct brcmf_pub *drvr = bus_if->drvr;
 400         struct brcmf_if *ifp;
 401
 402         /* await txstatus signal for firmware if active */
 403         if (brcmf_fws_fc_active(drvr->fws)) {
 404                 if (!success)
 405                         brcmf_fws_bustxfail(drvr->fws, txp);
 406         } else {
 407                 if (brcmf_proto_hdrpull(drvr, false, txp, &ifp))
 408                         brcmu_pkt_buf_free_skb(txp);
 409                 else
 410                         brcmf_txfinalize(ifp, txp, success);
 411         }
 412 }
 413
 414 static void brcmf_ethtool_get_drvinfo(struct net_device *ndev,
 415                                     struct ethtool_drvinfo *info)
 416 {
 417         struct brcmf_if *ifp = netdev_priv(ndev);
 418         struct brcmf_pub *drvr = ifp->drvr;
 419         char drev[BRCMU_DOTREV_LEN] = "n/a";
 420
 421         if (drvr->revinfo.result == 0)
 422                 brcmu_dotrev_str(drvr->revinfo.driverrev, drev);
 423         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 424         strlcpy(info->version, drev, sizeof(info->version));
 425         strlcpy(info->fw_version, drvr->fwver, sizeof(info->fw_version));
 426         strlcpy(info->bus_info, dev_name(drvr->bus_if->dev),
 427                 sizeof(info->bus_info));
 428 }
 429
 430 static const struct ethtool_ops brcmf_ethtool_ops = {
 431         .get_drvinfo = brcmf_ethtool_get_drvinfo,
 432 };
 433
 434 static int brcmf_netdev_stop(struct net_device *ndev)
 435 {
 436         struct brcmf_if *ifp = netdev_priv(ndev);
 437
 438         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 439
 440         brcmf_cfg80211_down(ndev);
 441
 442         brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear", NULL, 0);
 443
 444         brcmf_net_setcarrier(ifp, false);
 445
 446         return 0;
 447 }
 448
 449 static int brcmf_netdev_open(struct net_device *ndev)
 450 {
 451         struct brcmf_if *ifp = netdev_priv(ndev);
 452         struct brcmf_pub *drvr = ifp->drvr;
 453         struct brcmf_bus *bus_if = drvr->bus_if;
 454         u32 toe_ol;
 455
 456         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 457
 458         /* If bus is not ready, can't continue */
 459         if (bus_if->state != BRCMF_BUS_UP) {
 460                 brcmf_err("failed bus is not ready\n");
 461                 return -EAGAIN;
 462         }
 463
 464         atomic_set(&ifp->pend_8021x_cnt, 0);
 465
 466         /* Get current TOE mode from dongle */
 467         if (brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_ol) >= 0
 468             && (toe_ol & TOE_TX_CSUM_OL) != 0)
 469                 ndev->features |= NETIF_F_IP_CSUM;
 470         else
 471                 ndev->features &= ~NETIF_F_IP_CSUM;
 472
 473         if (brcmf_cfg80211_up(ndev)) {
 474                 brcmf_err("failed to bring up cfg80211\n");
 475                 return -EIO;
 476         }
 477
 478         /* Clear, carrier, set when connected or AP mode. */
 479         netif_carrier_off(ndev);
 480         return 0;
 481 }
 482
 483 static const struct net_device_ops brcmf_netdev_ops_pri = {
 484         .ndo_open = brcmf_netdev_open,
 485         .ndo_stop = brcmf_netdev_stop,
 486         .ndo_start_xmit = brcmf_netdev_start_xmit,
 487         .ndo_set_mac_address = brcmf_netdev_set_mac_address,
 488         .ndo_set_rx_mode = brcmf_netdev_set_multicast_list
 489 };
 490
 491 int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked)
 492 {
 493         struct brcmf_pub *drvr = ifp->drvr;
 494         struct net_device *ndev;
 495         s32 err;
 496
 497         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 498                   ifp->mac_addr);
 499         ndev = ifp->ndev;
 500
 501         /* set appropriate operations */
 502         ndev->netdev_ops = &brcmf_netdev_ops_pri;
 503
 504         ndev->needed_headroom += drvr->hdrlen;
 505         ndev->ethtool_ops = &brcmf_ethtool_ops;
 506
 507         /* set the mac address */
 508         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 509
 510         INIT_WORK(&ifp->multicast_work, _brcmf_set_multicast_list);
 511         INIT_WORK(&ifp->ndoffload_work, _brcmf_update_ndtable);
 512
 513         if (rtnl_locked)
 514                 err = register_netdevice(ndev);
 515         else
 516                 err = register_netdev(ndev);
 517         if (err != 0) {
 518                 brcmf_err("couldn't register the net device\n");
 519                 goto fail;
 520         }
 521
 522         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 523         return 0;
 524
 525 fail:
 526         drvr->iflist[ifp->bsscfgidx] = NULL;
 527         ndev->netdev_ops = NULL;
 528         free_netdev(ndev);
 529         return -EBADE;
 530 }
 531
 532 static void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked)
 533 {
 534         if (ndev->reg_state == NETREG_REGISTERED) {
 535                 if (rtnl_locked)
 536                         unregister_netdevice(ndev);
 537                 else
 538                         unregister_netdev(ndev);
 539         } else {
 540                 brcmf_cfg80211_free_netdev(ndev);
 541         }
 542 }
 543
 544 void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on)
 545 {
 546         struct net_device *ndev;
 547
 548         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d carrier=%d\n", ifp->bsscfgidx,
 549                   on);
 550
 551         ndev = ifp->ndev;
 552         brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_DISCONNECTED, !on);
 553         if (on) {
 554                 if (!netif_carrier_ok(ndev))
 555                         netif_carrier_on(ndev);
 556
 557         } else {
 558                 if (netif_carrier_ok(ndev))
 559                         netif_carrier_off(ndev);
 560         }
 561 }
 562
 563 static int brcmf_net_p2p_open(struct net_device *ndev)
 564 {
 565         brcmf_dbg(TRACE, "Enter\n");
 566
 567         return brcmf_cfg80211_up(ndev);
 568 }
 569
 570 static int brcmf_net_p2p_stop(struct net_device *ndev)
 571 {
 572         brcmf_dbg(TRACE, "Enter\n");
 573
 574         return brcmf_cfg80211_down(ndev);
 575 }
 576
 577 static netdev_tx_t brcmf_net_p2p_start_xmit(struct sk_buff *skb,
 578                                             struct net_device *ndev)
 579 {
 580         if (skb)
 581                 dev_kfree_skb_any(skb);
 582
 583         return NETDEV_TX_OK;
 584 }
 585
 586 static const struct net_device_ops brcmf_netdev_ops_p2p = {
 587         .ndo_open = brcmf_net_p2p_open,
 588         .ndo_stop = brcmf_net_p2p_stop,
 589         .ndo_start_xmit = brcmf_net_p2p_start_xmit
 590 };
 591
 592 static int brcmf_net_p2p_attach(struct brcmf_if *ifp)
 593 {
 594         struct net_device *ndev;
 595
 596         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 597                   ifp->mac_addr);
 598         ndev = ifp->ndev;
 599
 600         ndev->netdev_ops = &brcmf_netdev_ops_p2p;
 601
 602         /* set the mac address */
 603         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 604
 605         if (register_netdev(ndev) != 0) {
 606                 brcmf_err("couldn't register the p2p net device\n");
 607                 goto fail;
 608         }
 609
 610         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 611
 612         return 0;
 613
 614 fail:
 615         ifp->drvr->iflist[ifp->bsscfgidx] = NULL;
 616         ndev->netdev_ops = NULL;
 617         free_netdev(ndev);
 618         return -EBADE;
 619 }
 620
 621 struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bsscfgidx, s32 ifidx,
 622                               bool is_p2pdev, const char *name, u8 *mac_addr)
 623 {
 624         struct brcmf_if *ifp;
 625         struct net_device *ndev;
 626
 627         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx, ifidx);
 628
 629         ifp = drvr->iflist[bsscfgidx];
 630         /*
 631          * Delete the existing interface before overwriting it
 632          * in case we missed the BRCMF_E_IF_DEL event.
 633          */
 634         if (ifp) {
 635                 if (ifidx) {
 636                         brcmf_err("ERROR: netdev:%s already exists\n",
 637                                   ifp->ndev->name);
 638                         netif_stop_queue(ifp->ndev);
 639                         brcmf_net_detach(ifp->ndev, false);
 640                         drvr->iflist[bsscfgidx] = NULL;
 641                 } else {
 642                         brcmf_dbg(INFO, "netdev:%s ignore IF event\n",
 643                                   ifp->ndev->name);
 644                         return ERR_PTR(-EINVAL);
 645                 }
 646         }
 647
 648         if (!drvr->settings->p2p_enable && is_p2pdev) {
 649                 /* this is P2P_DEVICE interface */
 650                 brcmf_dbg(INFO, "allocate non-netdev interface\n");
 651                 ifp = kzalloc(sizeof(*ifp), GFP_KERNEL);
 652                 if (!ifp)
 653                         return ERR_PTR(-ENOMEM);
 654         } else {
 655                 brcmf_dbg(INFO, "allocate netdev interface\n");
 656                 /* Allocate netdev, including space for private structure */
 657                 ndev = alloc_netdev(sizeof(*ifp), is_p2pdev ? "p2p%d" : name,
 658                                     NET_NAME_UNKNOWN, ether_setup);
 659                 if (!ndev)
 660                         return ERR_PTR(-ENOMEM);
 661
 662                 ndev->destructor = brcmf_cfg80211_free_netdev;
 663                 ifp = netdev_priv(ndev);
 664                 ifp->ndev = ndev;
 665                 /* store mapping ifidx to bsscfgidx */
 666                 if (drvr->if2bss[ifidx] == BRCMF_BSSIDX_INVALID)
 667                         drvr->if2bss[ifidx] = bsscfgidx;
 668         }
 669
 670         ifp->drvr = drvr;
 671         drvr->iflist[bsscfgidx] = ifp;
 672         ifp->ifidx = ifidx;
 673         ifp->bsscfgidx = bsscfgidx;
 674
 675         init_waitqueue_head(&ifp->pend_8021x_wait);
 676         spin_lock_init(&ifp->netif_stop_lock);
 677
 678         if (mac_addr != NULL)
 679                 memcpy(ifp->mac_addr, mac_addr, ETH_ALEN);
 680
 681         brcmf_dbg(TRACE, " ==== pid:%x, if:%s (%pM) created ===\n",
 682                   current->pid, name, ifp->mac_addr);
 683
 684         return ifp;
 685 }
 686
 687 static void brcmf_del_if(struct brcmf_pub *drvr, s32 bsscfgidx,
 688                          bool rtnl_locked)
 689 {
 690         struct brcmf_if *ifp;
 691
 692         ifp = drvr->iflist[bsscfgidx];
 693         drvr->iflist[bsscfgidx] = NULL;
 694         if (!ifp) {
 695                 brcmf_err("Null interface, bsscfgidx=%d\n", bsscfgidx);
 696                 return;
 697         }
 698         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx,
 699                   ifp->ifidx);
 700         if (drvr->if2bss[ifp->ifidx] == bsscfgidx)
 701                 drvr->if2bss[ifp->ifidx] = BRCMF_BSSIDX_INVALID;
 702         if (ifp->ndev) {
 703                 if (bsscfgidx == 0) {
 704                         if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 705                                 rtnl_lock();
 706                                 brcmf_netdev_stop(ifp->ndev);
 707                                 rtnl_unlock();
 708                         }
 709                 } else {
 710                         netif_stop_queue(ifp->ndev);
 711                 }
 712
 713                 if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 714                         cancel_work_sync(&ifp->multicast_work);
 715                         cancel_work_sync(&ifp->ndoffload_work);
 716                 }
 717                 brcmf_net_detach(ifp->ndev, rtnl_locked);
 718         } else {
 719                 /* Only p2p device interfaces which get dynamically created
 720                  * end up here. In this case the p2p module should be informed
 721                  * about the removal of the interface within the firmware. If
 722                  * not then p2p commands towards the firmware will cause some
 723                  * serious troublesome side effects. The p2p module will clean
 724                  * up the ifp if needed.
 725                  */
 726                 brcmf_p2p_ifp_removed(ifp, rtnl_locked);
 727                 kfree(ifp);
 728         }
 729 }
 730
 731 void brcmf_remove_interface(struct brcmf_if *ifp, bool rtnl_locked)
 732 {
 733         if (!ifp || WARN_ON(ifp->drvr->iflist[ifp->bsscfgidx] != ifp))
 734                 return;
 735         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", ifp->bsscfgidx,
 736                   ifp->ifidx);
 737         brcmf_fws_del_interface(ifp);
 738         brcmf_del_if(ifp->drvr, ifp->bsscfgidx, rtnl_locked);
 739 }
 740
 741 #ifdef CONFIG_INET
 742 #define ARPOL_MAX_ENTRIES       8
 743 static int brcmf_inetaddr_changed(struct notifier_block *nb,
 744                                   unsigned long action, void *data)
 745 {
 746         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 747                                               inetaddr_notifier);
 748         struct in_ifaddr *ifa = data;
 749         struct net_device *ndev = ifa->ifa_dev->dev;
 750         struct brcmf_if *ifp;
 751         int idx, i, ret;
 752         u32 val;
 753         __be32 addr_table[ARPOL_MAX_ENTRIES] = {0};
 754
 755         /* Find out if the notification is meant for us */
 756         for (idx = 0; idx < BRCMF_MAX_IFS; idx++) {
 757                 ifp = drvr->iflist[idx];
 758                 if (ifp && ifp->ndev == ndev)
 759                         break;
 760                 if (idx == BRCMF_MAX_IFS - 1)
 761                         return NOTIFY_DONE;
 762         }
 763
 764         /* check if arp offload is supported */
 765         ret = brcmf_fil_iovar_int_get(ifp, "arpoe", &val);
 766         if (ret)
 767                 return NOTIFY_OK;
 768
 769         /* old version only support primary index */
 770         ret = brcmf_fil_iovar_int_get(ifp, "arp_version", &val);
 771         if (ret)
 772                 val = 1;
 773         if (val == 1)
 774                 ifp = drvr->iflist[0];
 775
 776         /* retrieve the table from firmware */
 777         ret = brcmf_fil_iovar_data_get(ifp, "arp_hostip", addr_table,
 778                                        sizeof(addr_table));
 779         if (ret) {
 780                 brcmf_err("fail to get arp ip table err:%d\n", ret);
 781                 return NOTIFY_OK;
 782         }
 783
 784         for (i = 0; i < ARPOL_MAX_ENTRIES; i++)
 785                 if (ifa->ifa_address == addr_table[i])
 786                         break;
 787
 788         switch (action) {
 789         case NETDEV_UP:
 790                 if (i == ARPOL_MAX_ENTRIES) {
 791                         brcmf_dbg(TRACE, "add %pI4 to arp table\n",
 792                                   &ifa->ifa_address);
 793                         /* set it directly */
 794                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 795                                 &ifa->ifa_address, sizeof(ifa->ifa_address));
 796                         if (ret)
 797                                 brcmf_err("add arp ip err %d\n", ret);
 798                 }
 799                 break;
 800         case NETDEV_DOWN:
 801                 if (i < ARPOL_MAX_ENTRIES) {
 802                         addr_table[i] = 0;
 803                         brcmf_dbg(TRACE, "remove %pI4 from arp table\n",
 804                                   &ifa->ifa_address);
 805                         /* clear the table in firmware */
 806                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear",
 807                                                        NULL, 0);
 808                         if (ret) {
 809                                 brcmf_err("fail to clear arp ip table err:%d\n",
 810                                           ret);
 811                                 return NOTIFY_OK;
 812                         }
 813                         for (i = 0; i < ARPOL_MAX_ENTRIES; i++) {
 814                                 if (addr_table[i] == 0)
 815                                         continue;
 816                                 ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 817                                                                &addr_table[i],
 818                                                                sizeof(addr_table[i]));
 819                                 if (ret)
 820                                         brcmf_err("add arp ip err %d\n",
 821                                                   ret);
 822                         }
 823                 }
 824                 break;
 825         default:
 826                 break;
 827         }
 828
 829         return NOTIFY_OK;
 830 }
 831 #endif
 832
 833 #if IS_ENABLED(CONFIG_IPV6)
 834 static int brcmf_inet6addr_changed(struct notifier_block *nb,
 835                                    unsigned long action, void *data)
 836 {
 837         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 838                                               inet6addr_notifier);
 839         struct inet6_ifaddr *ifa = data;
 840         struct brcmf_if *ifp;
 841         int i;
 842         struct in6_addr *table;
 843
 844         /* Only handle primary interface */
 845         ifp = drvr->iflist[0];
 846         if (!ifp)
 847                 return NOTIFY_DONE;
 848         if (ifp->ndev != ifa->idev->dev)
 849                 return NOTIFY_DONE;
 850
 851         table = ifp->ipv6_addr_tbl;
 852         for (i = 0; i < NDOL_MAX_ENTRIES; i++)
 853                 if (ipv6_addr_equal(&ifa->addr, &table[i]))
 854                         break;
 855
 856         switch (action) {
 857         case NETDEV_UP:
 858                 if (i == NDOL_MAX_ENTRIES) {
 859                         if (ifp->ipv6addr_idx < NDOL_MAX_ENTRIES) {
 860                                 table[ifp->ipv6addr_idx++] = ifa->addr;
 861                         } else {
 862                                 for (i = 0; i < NDOL_MAX_ENTRIES - 1; i++)
 863                                         table[i] = table[i + 1];
 864                                 table[NDOL_MAX_ENTRIES - 1] = ifa->addr;
 865                         }
 866                 }
 867                 break;
 868         case NETDEV_DOWN:
 869                 if (i < NDOL_MAX_ENTRIES) {
 870                         for (; i < ifp->ipv6addr_idx - 1; i++)
 871                                 table[i] = table[i + 1];
 872                         memset(&table[i], 0, sizeof(table[i]));
 873                         ifp->ipv6addr_idx--;
 874                 }
 875                 break;
 876         default:
 877                 break;
 878         }
 879
 880         schedule_work(&ifp->ndoffload_work);
 881
 882         return NOTIFY_OK;
 883 }
 884 #endif
 885
 886 int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 887 {
 888         struct brcmf_pub *drvr = NULL;
 889         int ret = 0;
 890         int i;
 891
 892         brcmf_dbg(TRACE, "Enter\n");
 893
 894         /* Allocate primary brcmf_info */
 895         drvr = kzalloc(sizeof(struct brcmf_pub), GFP_ATOMIC);
 896         if (!drvr)
 897                 return -ENOMEM;
 898
 899         for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
 900                 drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
 901
 902         mutex_init(&drvr->proto_block);
 903
 904         /* Link to bus module */
 905         drvr->hdrlen = 0;
 906         drvr->bus_if = dev_get_drvdata(dev);
 907         drvr->bus_if->drvr = drvr;
 908         drvr->settings = settings;
 909
 910         /* attach debug facilities */
 911         brcmf_debug_attach(drvr);
 912
 913         /* Attach and link in the protocol */
 914         ret = brcmf_proto_attach(drvr);
 915         if (ret != 0) {
 916                 brcmf_err("brcmf_prot_attach failed\n");
 917                 goto fail;
 918         }
 919
 920         /* attach firmware event handler */
 921         brcmf_fweh_attach(drvr);
 922
 923         return ret;
 924
 925 fail:
 926         brcmf_detach(dev);
 927
 928         return ret;
 929 }
 930
 931 static int brcmf_revinfo_read(struct seq_file *s, void *data)
 932 {
 933         struct brcmf_bus *bus_if = dev_get_drvdata(s->private);
 934         struct brcmf_rev_info *ri = &bus_if->drvr->revinfo;
 935         char drev[BRCMU_DOTREV_LEN];
 936         char brev[BRCMU_BOARDREV_LEN];
 937
 938         seq_printf(s, "vendorid: 0x%04x\n", ri->vendorid);
 939         seq_printf(s, "deviceid: 0x%04x\n", ri->deviceid);
 940         seq_printf(s, "radiorev: %s\n", brcmu_dotrev_str(ri->radiorev, drev));
 941         seq_printf(s, "chipnum: %u (%x)\n", ri->chipnum, ri->chipnum);
 942         seq_printf(s, "chiprev: %u\n", ri->chiprev);
 943         seq_printf(s, "chippkg: %u\n", ri->chippkg);
 944         seq_printf(s, "corerev: %u\n", ri->corerev);
 945         seq_printf(s, "boardid: 0x%04x\n", ri->boardid);
 946         seq_printf(s, "boardvendor: 0x%04x\n", ri->boardvendor);
 947         seq_printf(s, "boardrev: %s\n", brcmu_boardrev_str(ri->boardrev, brev));
 948         seq_printf(s, "driverrev: %s\n", brcmu_dotrev_str(ri->driverrev, drev));
 949         seq_printf(s, "ucoderev: %u\n", ri->ucoderev);
 950         seq_printf(s, "bus: %u\n", ri->bus);
 951         seq_printf(s, "phytype: %u\n", ri->phytype);
 952         seq_printf(s, "phyrev: %u\n", ri->phyrev);
 953         seq_printf(s, "anarev: %u\n", ri->anarev);
 954         seq_printf(s, "nvramrev: %08x\n", ri->nvramrev);
 955
 956         return 0;
 957 }
 958
 959 int brcmf_bus_started(struct device *dev)
 960 {
 961         int ret = -1;
 962         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 963         struct brcmf_pub *drvr = bus_if->drvr;
 964         struct brcmf_if *ifp;
 965         struct brcmf_if *p2p_ifp;
 966
 967         brcmf_dbg(TRACE, "\n");
 968
 969         /* add primary networking interface */
 970         ifp = brcmf_add_if(drvr, 0, 0, false, "wlan%d", NULL);
 971         if (IS_ERR(ifp))
 972                 return PTR_ERR(ifp);
 973
 974         p2p_ifp = NULL;
 975
 976         /* signal bus ready */
 977         brcmf_bus_change_state(bus_if, BRCMF_BUS_UP);
 978
 979         /* Bus is ready, do any initialization */
 980         ret = brcmf_c_preinit_dcmds(ifp);
 981         if (ret < 0)
 982                 goto fail;
 983
 984         brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
 985
 986         /* assure we have chipid before feature attach */
 987         if (!bus_if->chip) {
 988                 bus_if->chip = drvr->revinfo.chipnum;
 989                 bus_if->chiprev = drvr->revinfo.chiprev;
 990                 brcmf_dbg(INFO, "firmware revinfo: chip %x (%d) rev %d\n",
 991                           bus_if->chip, bus_if->chip, bus_if->chiprev);
 992         }
 993         brcmf_feat_attach(drvr);
 994
 995         ret = brcmf_fws_init(drvr);
 996         if (ret < 0)
 997                 goto fail;
 998
 999         brcmf_fws_add_interface(ifp);
1000
1001         drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev,
1002                                              drvr->settings->p2p_enable);
1003         if (drvr->config == NULL) {
1004                 ret = -ENOMEM;
1005                 goto fail;
1006         }
1007
1008         ret = brcmf_net_attach(ifp, false);
1009
1010         if ((!ret) && (drvr->settings->p2p_enable)) {
1011                 p2p_ifp = drvr->iflist[1];
1012                 if (p2p_ifp)
1013                         ret = brcmf_net_p2p_attach(p2p_ifp);
1014         }
1015
1016         if (ret)
1017                 goto fail;
1018
1019 #ifdef CONFIG_INET
1020         drvr->inetaddr_notifier.notifier_call = brcmf_inetaddr_changed;
1021         ret = register_inetaddr_notifier(&drvr->inetaddr_notifier);
1022         if (ret)
1023                 goto fail;
1024
1025 #if IS_ENABLED(CONFIG_IPV6)
1026         drvr->inet6addr_notifier.notifier_call = brcmf_inet6addr_changed;
1027         ret = register_inet6addr_notifier(&drvr->inet6addr_notifier);
1028         if (ret) {
1029                 unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1030                 goto fail;
1031         }
1032 #endif
1033 #endif /* CONFIG_INET */
1034
1035         return 0;
1036
1037 fail:
1038         brcmf_err("failed: %d\n", ret);
1039         if (drvr->config) {
1040                 brcmf_cfg80211_detach(drvr->config);
1041                 drvr->config = NULL;
1042         }
1043         if (drvr->fws) {
1044                 brcmf_fws_del_interface(ifp);
1045                 brcmf_fws_deinit(drvr);
1046         }
1047         brcmf_net_detach(ifp->ndev, false);
1048         if (p2p_ifp)
1049                 brcmf_net_detach(p2p_ifp->ndev, false);
1050         drvr->iflist[0] = NULL;
1051         drvr->iflist[1] = NULL;
1052         if (drvr->settings->ignore_probe_fail)
1053                 ret = 0;
1054
1055         return ret;
1056 }
1057
1058 void brcmf_bus_add_txhdrlen(struct device *dev, uint len)
1059 {
1060         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1061         struct brcmf_pub *drvr = bus_if->drvr;
1062
1063         if (drvr) {
1064                 drvr->hdrlen += len;
1065         }
1066 }
1067
1068 void brcmf_dev_reset(struct device *dev)
1069 {
1070         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1071         struct brcmf_pub *drvr = bus_if->drvr;
1072
1073         if (drvr == NULL)
1074                 return;
1075
1076         if (drvr->iflist[0])
1077                 brcmf_fil_cmd_int_set(drvr->iflist[0], BRCMF_C_TERMINATED, 1);
1078 }
1079
1080 void brcmf_detach(struct device *dev)
1081 {
1082         s32 i;
1083         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1084         struct brcmf_pub *drvr = bus_if->drvr;
1085
1086         brcmf_dbg(TRACE, "Enter\n");
1087
1088         if (drvr == NULL)
1089                 return;
1090
1091 #ifdef CONFIG_INET
1092         unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1093 #endif
1094
1095 #if IS_ENABLED(CONFIG_IPV6)
1096         unregister_inet6addr_notifier(&drvr->inet6addr_notifier);
1097 #endif
1098
1099         /* stop firmware event handling */
1100         brcmf_fweh_detach(drvr);
1101         if (drvr->config)
1102                 brcmf_p2p_detach(&drvr->config->p2p);
1103
1104         brcmf_bus_change_state(bus_if, BRCMF_BUS_DOWN);
1105
1106         /* make sure primary interface removed last */
1107         for (i = BRCMF_MAX_IFS-1; i > -1; i--)
1108                 brcmf_remove_interface(drvr->iflist[i], false);
1109
1110         brcmf_cfg80211_detach(drvr->config);
1111
1112         brcmf_fws_deinit(drvr);
1113
1114         brcmf_bus_stop(drvr->bus_if);
1115
1116         brcmf_proto_detach(drvr);
1117
1118         brcmf_debug_detach(drvr);
1119         bus_if->drvr = NULL;
1120         kfree(drvr);
1121 }
1122
1123 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len)
1124 {
1125         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1126         struct brcmf_if *ifp = bus_if->drvr->iflist[0];
1127
1128         return brcmf_fil_iovar_data_set(ifp, name, data, len);
1129 }
1130
1131 static int brcmf_get_pend_8021x_cnt(struct brcmf_if *ifp)
1132 {
1133         return atomic_read(&ifp->pend_8021x_cnt);
1134 }
1135
1136 int brcmf_netdev_wait_pend8021x(struct brcmf_if *ifp)
1137 {
1138         int err;
1139
1140         err = wait_event_timeout(ifp->pend_8021x_wait,
1141                                  !brcmf_get_pend_8021x_cnt(ifp),
1142                                  MAX_WAIT_FOR_8021X_TX);
1143
1144         if (!err)
1145                 brcmf_err("Timed out waiting for no pending 802.1x packets\n");
1146
1147         return !err;
1148 }
1149
1150 void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state)
1151 {
1152         struct brcmf_pub *drvr = bus->drvr;
1153         struct net_device *ndev;
1154         int ifidx;
1155
1156         brcmf_dbg(TRACE, "%d -> %d\n", bus->state, state);
1157         bus->state = state;
1158
1159         if (state == BRCMF_BUS_UP) {
1160                 for (ifidx = 0; ifidx < BRCMF_MAX_IFS; ifidx++) {
1161                         if ((drvr->iflist[ifidx]) &&
1162                             (drvr->iflist[ifidx]->ndev)) {
1163                                 ndev = drvr->iflist[ifidx]->ndev;
1164                                 if (netif_queue_stopped(ndev))
1165                                         netif_wake_queue(ndev);
1166                         }
1167                 }
1168         }
1169 }
1170
1171 static void brcmf_driver_register(struct work_struct *work)
1172 {
1173 #ifdef CONFIG_BRCMFMAC_SDIO
1174         brcmf_sdio_register();
1175 #endif
1176 #ifdef CONFIG_BRCMFMAC_USB
1177         brcmf_usb_register();
1178 #endif
1179 #ifdef CONFIG_BRCMFMAC_PCIE
1180         brcmf_pcie_register();
1181 #endif
1182 }
1183 static DECLARE_WORK(brcmf_driver_work, brcmf_driver_register);
1184
1185 int __init brcmf_core_init(void)
1186 {
1187         if (!schedule_work(&brcmf_driver_work))
1188                 return -EBUSY;
1189
1190         return 0;
1191 }
1192
1193 void __exit brcmf_core_exit(void)
1194 {
1195         cancel_work_sync(&brcmf_driver_work);
1196
1197 #ifdef CONFIG_BRCMFMAC_SDIO
1198         brcmf_sdio_exit();
1199 #endif
1200 #ifdef CONFIG_BRCMFMAC_USB
1201         brcmf_usb_exit();
1202 #endif
1203 #ifdef CONFIG_BRCMFMAC_PCIE
1204         brcmf_pcie_exit();
1205 #endif
1206 }
1207