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;
 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 writable headroom*/
 215         ret = skb_cow_head(skb, drvr->hdrlen);
 216         if (ret < 0) {
 217                 brcmf_err("%s: skb_cow_head failed\n",
 218                           brcmf_ifname(ifp));
 219                 dev_kfree_skb(skb);
 220                 goto done;
 221         }
 222
 223         /* validate length for ether packet */
 224         if (skb->len < sizeof(*eh)) {
 225                 ret = -EINVAL;
 226                 dev_kfree_skb(skb);
 227                 goto done;
 228         }
 229
 230         eh = (struct ethhdr *)(skb->data);
 231
 232         if (eh->h_proto == htons(ETH_P_PAE))
 233                 atomic_inc(&ifp->pend_8021x_cnt);
 234
 235         ret = brcmf_fws_process_skb(ifp, skb);
 236
 237 done:
 238         if (ret) {
 239                 ifp->stats.tx_dropped++;
 240         } else {
 241                 ifp->stats.tx_packets++;
 242                 ifp->stats.tx_bytes += skb->len;
 243         }
 244
 245         /* Return ok: we always eat the packet */
 246         return NETDEV_TX_OK;
 247 }
 248
 249 void brcmf_txflowblock_if(struct brcmf_if *ifp,
 250                           enum brcmf_netif_stop_reason reason, bool state)
 251 {
 252         unsigned long flags;
 253
 254         if (!ifp || !ifp->ndev)
 255                 return;
 256
 257         brcmf_dbg(TRACE, "enter: bsscfgidx=%d stop=0x%X reason=%d state=%d\n",
 258                   ifp->bsscfgidx, ifp->netif_stop, reason, state);
 259
 260         spin_lock_irqsave(&ifp->netif_stop_lock, flags);
 261         if (state) {
 262                 if (!ifp->netif_stop)
 263                         netif_stop_queue(ifp->ndev);
 264                 ifp->netif_stop |= reason;
 265         } else {
 266                 ifp->netif_stop &= ~reason;
 267                 if (!ifp->netif_stop)
 268                         netif_wake_queue(ifp->ndev);
 269         }
 270         spin_unlock_irqrestore(&ifp->netif_stop_lock, flags);
 271 }
 272
 273 void brcmf_txflowblock(struct device *dev, bool state)
 274 {
 275         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 276         struct brcmf_pub *drvr = bus_if->drvr;
 277
 278         brcmf_dbg(TRACE, "Enter\n");
 279
 280         brcmf_fws_bus_blocked(drvr, state);
 281 }
 282
 283 void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb)
 284 {
 285         if (skb->pkt_type == PACKET_MULTICAST)
 286                 ifp->stats.multicast++;
 287
 288         if (!(ifp->ndev->flags & IFF_UP)) {
 289                 brcmu_pkt_buf_free_skb(skb);
 290                 return;
 291         }
 292
 293         ifp->stats.rx_bytes += skb->len;
 294         ifp->stats.rx_packets++;
 295
 296         brcmf_dbg(DATA, "rx proto=0x%X\n", ntohs(skb->protocol));
 297         if (in_interrupt())
 298                 netif_rx(skb);
 299         else
 300                 /* If the receive is not processed inside an ISR,
 301                  * the softirqd must be woken explicitly to service
 302                  * the NET_RX_SOFTIRQ.  This is handled by netif_rx_ni().
 303                  */
 304                 netif_rx_ni(skb);
 305 }
 306
 307 static int brcmf_rx_hdrpull(struct brcmf_pub *drvr, struct sk_buff *skb,
 308                             struct brcmf_if **ifp)
 309 {
 310         int ret;
 311
 312         /* process and remove protocol-specific header */
 313         ret = brcmf_proto_hdrpull(drvr, true, skb, ifp);
 314
 315         if (ret || !(*ifp) || !(*ifp)->ndev) {
 316                 if (ret != -ENODATA && *ifp)
 317                         (*ifp)->stats.rx_errors++;
 318                 brcmu_pkt_buf_free_skb(skb);
 319                 return -ENODATA;
 320         }
 321
 322         skb->protocol = eth_type_trans(skb, (*ifp)->ndev);
 323         return 0;
 324 }
 325
 326 void brcmf_rx_frame(struct device *dev, struct sk_buff *skb, bool handle_event)
 327 {
 328         struct brcmf_if *ifp;
 329         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 330         struct brcmf_pub *drvr = bus_if->drvr;
 331
 332         brcmf_dbg(DATA, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 333
 334         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 335                 return;
 336
 337         if (brcmf_proto_is_reorder_skb(skb)) {
 338                 brcmf_proto_rxreorder(ifp, skb);
 339         } else {
 340                 /* Process special event packets */
 341                 if (handle_event)
 342                         brcmf_fweh_process_skb(ifp->drvr, skb,
 343                                                BCMILCP_SUBTYPE_VENDOR_LONG);
 344
 345                 brcmf_netif_rx(ifp, skb);
 346         }
 347 }
 348
 349 void brcmf_rx_event(struct device *dev, struct sk_buff *skb)
 350 {
 351         struct brcmf_if *ifp;
 352         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 353         struct brcmf_pub *drvr = bus_if->drvr;
 354
 355         brcmf_dbg(EVENT, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 356
 357         if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 358                 return;
 359
 360         brcmf_fweh_process_skb(ifp->drvr, skb, 0);
 361         brcmu_pkt_buf_free_skb(skb);
 362 }
 363
 364 void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success)
 365 {
 366         struct ethhdr *eh;
 367         u16 type;
 368
 369         eh = (struct ethhdr *)(txp->data);
 370         type = ntohs(eh->h_proto);
 371
 372         if (type == ETH_P_PAE) {
 373                 atomic_dec(&ifp->pend_8021x_cnt);
 374                 if (waitqueue_active(&ifp->pend_8021x_wait))
 375                         wake_up(&ifp->pend_8021x_wait);
 376         }
 377
 378         if (!success)
 379                 ifp->stats.tx_errors++;
 380
 381         brcmu_pkt_buf_free_skb(txp);
 382 }
 383
 384 void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success)
 385 {
 386         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 387         struct brcmf_pub *drvr = bus_if->drvr;
 388         struct brcmf_if *ifp;
 389
 390         /* await txstatus signal for firmware if active */
 391         if (brcmf_fws_fc_active(drvr->fws)) {
 392                 if (!success)
 393                         brcmf_fws_bustxfail(drvr->fws, txp);
 394         } else {
 395                 if (brcmf_proto_hdrpull(drvr, false, txp, &ifp))
 396                         brcmu_pkt_buf_free_skb(txp);
 397                 else
 398                         brcmf_txfinalize(ifp, txp, success);
 399         }
 400 }
 401
 402 static struct net_device_stats *brcmf_netdev_get_stats(struct net_device *ndev)
 403 {
 404         struct brcmf_if *ifp = netdev_priv(ndev);
 405
 406         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 407
 408         return &ifp->stats;
 409 }
 410
 411 static void brcmf_ethtool_get_drvinfo(struct net_device *ndev,
 412                                     struct ethtool_drvinfo *info)
 413 {
 414         struct brcmf_if *ifp = netdev_priv(ndev);
 415         struct brcmf_pub *drvr = ifp->drvr;
 416         char drev[BRCMU_DOTREV_LEN] = "n/a";
 417
 418         if (drvr->revinfo.result == 0)
 419                 brcmu_dotrev_str(drvr->revinfo.driverrev, drev);
 420         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 421         strlcpy(info->version, drev, sizeof(info->version));
 422         strlcpy(info->fw_version, drvr->fwver, sizeof(info->fw_version));
 423         strlcpy(info->bus_info, dev_name(drvr->bus_if->dev),
 424                 sizeof(info->bus_info));
 425 }
 426
 427 static const struct ethtool_ops brcmf_ethtool_ops = {
 428         .get_drvinfo = brcmf_ethtool_get_drvinfo,
 429 };
 430
 431 static int brcmf_netdev_stop(struct net_device *ndev)
 432 {
 433         struct brcmf_if *ifp = netdev_priv(ndev);
 434
 435         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 436
 437         brcmf_cfg80211_down(ndev);
 438
 439         brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear", NULL, 0);
 440
 441         brcmf_net_setcarrier(ifp, false);
 442
 443         return 0;
 444 }
 445
 446 static int brcmf_netdev_open(struct net_device *ndev)
 447 {
 448         struct brcmf_if *ifp = netdev_priv(ndev);
 449         struct brcmf_pub *drvr = ifp->drvr;
 450         struct brcmf_bus *bus_if = drvr->bus_if;
 451         u32 toe_ol;
 452
 453         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx);
 454
 455         /* If bus is not ready, can't continue */
 456         if (bus_if->state != BRCMF_BUS_UP) {
 457                 brcmf_err("failed bus is not ready\n");
 458                 return -EAGAIN;
 459         }
 460
 461         atomic_set(&ifp->pend_8021x_cnt, 0);
 462
 463         /* Get current TOE mode from dongle */
 464         if (brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_ol) >= 0
 465             && (toe_ol & TOE_TX_CSUM_OL) != 0)
 466                 ndev->features |= NETIF_F_IP_CSUM;
 467         else
 468                 ndev->features &= ~NETIF_F_IP_CSUM;
 469
 470         if (brcmf_cfg80211_up(ndev)) {
 471                 brcmf_err("failed to bring up cfg80211\n");
 472                 return -EIO;
 473         }
 474
 475         /* Clear, carrier, set when connected or AP mode. */
 476         netif_carrier_off(ndev);
 477         return 0;
 478 }
 479
 480 static const struct net_device_ops brcmf_netdev_ops_pri = {
 481         .ndo_open = brcmf_netdev_open,
 482         .ndo_stop = brcmf_netdev_stop,
 483         .ndo_get_stats = brcmf_netdev_get_stats,
 484         .ndo_start_xmit = brcmf_netdev_start_xmit,
 485         .ndo_set_mac_address = brcmf_netdev_set_mac_address,
 486         .ndo_set_rx_mode = brcmf_netdev_set_multicast_list
 487 };
 488
 489 int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked)
 490 {
 491         struct brcmf_pub *drvr = ifp->drvr;
 492         struct net_device *ndev;
 493         s32 err;
 494
 495         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 496                   ifp->mac_addr);
 497         ndev = ifp->ndev;
 498
 499         /* set appropriate operations */
 500         ndev->netdev_ops = &brcmf_netdev_ops_pri;
 501
 502         ndev->needed_headroom += drvr->hdrlen;
 503         ndev->ethtool_ops = &brcmf_ethtool_ops;
 504
 505         /* set the mac address */
 506         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 507
 508         INIT_WORK(&ifp->multicast_work, _brcmf_set_multicast_list);
 509         INIT_WORK(&ifp->ndoffload_work, _brcmf_update_ndtable);
 510
 511         if (rtnl_locked)
 512                 err = register_netdevice(ndev);
 513         else
 514                 err = register_netdev(ndev);
 515         if (err != 0) {
 516                 brcmf_err("couldn't register the net device\n");
 517                 goto fail;
 518         }
 519
 520         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 521         return 0;
 522
 523 fail:
 524         drvr->iflist[ifp->bsscfgidx] = NULL;
 525         ndev->netdev_ops = NULL;
 526         free_netdev(ndev);
 527         return -EBADE;
 528 }
 529
 530 static void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked)
 531 {
 532         if (ndev->reg_state == NETREG_REGISTERED) {
 533                 if (rtnl_locked)
 534                         unregister_netdevice(ndev);
 535                 else
 536                         unregister_netdev(ndev);
 537         } else {
 538                 brcmf_cfg80211_free_netdev(ndev);
 539         }
 540 }
 541
 542 void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on)
 543 {
 544         struct net_device *ndev;
 545
 546         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d carrier=%d\n", ifp->bsscfgidx,
 547                   on);
 548
 549         ndev = ifp->ndev;
 550         brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_DISCONNECTED, !on);
 551         if (on) {
 552                 if (!netif_carrier_ok(ndev))
 553                         netif_carrier_on(ndev);
 554
 555         } else {
 556                 if (netif_carrier_ok(ndev))
 557                         netif_carrier_off(ndev);
 558         }
 559 }
 560
 561 static int brcmf_net_p2p_open(struct net_device *ndev)
 562 {
 563         brcmf_dbg(TRACE, "Enter\n");
 564
 565         return brcmf_cfg80211_up(ndev);
 566 }
 567
 568 static int brcmf_net_p2p_stop(struct net_device *ndev)
 569 {
 570         brcmf_dbg(TRACE, "Enter\n");
 571
 572         return brcmf_cfg80211_down(ndev);
 573 }
 574
 575 static netdev_tx_t brcmf_net_p2p_start_xmit(struct sk_buff *skb,
 576                                             struct net_device *ndev)
 577 {
 578         if (skb)
 579                 dev_kfree_skb_any(skb);
 580
 581         return NETDEV_TX_OK;
 582 }
 583
 584 static const struct net_device_ops brcmf_netdev_ops_p2p = {
 585         .ndo_open = brcmf_net_p2p_open,
 586         .ndo_stop = brcmf_net_p2p_stop,
 587         .ndo_start_xmit = brcmf_net_p2p_start_xmit
 588 };
 589
 590 static int brcmf_net_p2p_attach(struct brcmf_if *ifp)
 591 {
 592         struct net_device *ndev;
 593
 594         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d mac=%pM\n", ifp->bsscfgidx,
 595                   ifp->mac_addr);
 596         ndev = ifp->ndev;
 597
 598         ndev->netdev_ops = &brcmf_netdev_ops_p2p;
 599
 600         /* set the mac address */
 601         memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
 602
 603         if (register_netdev(ndev) != 0) {
 604                 brcmf_err("couldn't register the p2p net device\n");
 605                 goto fail;
 606         }
 607
 608         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
 609
 610         return 0;
 611
 612 fail:
 613         ifp->drvr->iflist[ifp->bsscfgidx] = NULL;
 614         ndev->netdev_ops = NULL;
 615         free_netdev(ndev);
 616         return -EBADE;
 617 }
 618
 619 struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bsscfgidx, s32 ifidx,
 620                               bool is_p2pdev, const char *name, u8 *mac_addr)
 621 {
 622         struct brcmf_if *ifp;
 623         struct net_device *ndev;
 624
 625         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx, ifidx);
 626
 627         ifp = drvr->iflist[bsscfgidx];
 628         /*
 629          * Delete the existing interface before overwriting it
 630          * in case we missed the BRCMF_E_IF_DEL event.
 631          */
 632         if (ifp) {
 633                 if (ifidx) {
 634                         brcmf_err("ERROR: netdev:%s already exists\n",
 635                                   ifp->ndev->name);
 636                         netif_stop_queue(ifp->ndev);
 637                         brcmf_net_detach(ifp->ndev, false);
 638                         drvr->iflist[bsscfgidx] = NULL;
 639                 } else {
 640                         brcmf_dbg(INFO, "netdev:%s ignore IF event\n",
 641                                   ifp->ndev->name);
 642                         return ERR_PTR(-EINVAL);
 643                 }
 644         }
 645
 646         if (!drvr->settings->p2p_enable && is_p2pdev) {
 647                 /* this is P2P_DEVICE interface */
 648                 brcmf_dbg(INFO, "allocate non-netdev interface\n");
 649                 ifp = kzalloc(sizeof(*ifp), GFP_KERNEL);
 650                 if (!ifp)
 651                         return ERR_PTR(-ENOMEM);
 652         } else {
 653                 brcmf_dbg(INFO, "allocate netdev interface\n");
 654                 /* Allocate netdev, including space for private structure */
 655                 ndev = alloc_netdev(sizeof(*ifp), is_p2pdev ? "p2p%d" : name,
 656                                     NET_NAME_UNKNOWN, ether_setup);
 657                 if (!ndev)
 658                         return ERR_PTR(-ENOMEM);
 659
 660                 ndev->destructor = brcmf_cfg80211_free_netdev;
 661                 ifp = netdev_priv(ndev);
 662                 ifp->ndev = ndev;
 663                 /* store mapping ifidx to bsscfgidx */
 664                 if (drvr->if2bss[ifidx] == BRCMF_BSSIDX_INVALID)
 665                         drvr->if2bss[ifidx] = bsscfgidx;
 666         }
 667
 668         ifp->drvr = drvr;
 669         drvr->iflist[bsscfgidx] = ifp;
 670         ifp->ifidx = ifidx;
 671         ifp->bsscfgidx = bsscfgidx;
 672
 673         init_waitqueue_head(&ifp->pend_8021x_wait);
 674         spin_lock_init(&ifp->netif_stop_lock);
 675
 676         if (mac_addr != NULL)
 677                 memcpy(ifp->mac_addr, mac_addr, ETH_ALEN);
 678
 679         brcmf_dbg(TRACE, " ==== pid:%x, if:%s (%pM) created ===\n",
 680                   current->pid, name, ifp->mac_addr);
 681
 682         return ifp;
 683 }
 684
 685 static void brcmf_del_if(struct brcmf_pub *drvr, s32 bsscfgidx,
 686                          bool rtnl_locked)
 687 {
 688         struct brcmf_if *ifp;
 689         int ifidx;
 690
 691         ifp = drvr->iflist[bsscfgidx];
 692         if (!ifp) {
 693                 brcmf_err("Null interface, bsscfgidx=%d\n", bsscfgidx);
 694                 return;
 695         }
 696         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", bsscfgidx,
 697                   ifp->ifidx);
 698         ifidx = ifp->ifidx;
 699
 700         if (ifp->ndev) {
 701                 if (bsscfgidx == 0) {
 702                         if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 703                                 rtnl_lock();
 704                                 brcmf_netdev_stop(ifp->ndev);
 705                                 rtnl_unlock();
 706                         }
 707                 } else {
 708                         netif_stop_queue(ifp->ndev);
 709                 }
 710
 711                 if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 712                         cancel_work_sync(&ifp->multicast_work);
 713                         cancel_work_sync(&ifp->ndoffload_work);
 714                 }
 715                 brcmf_net_detach(ifp->ndev, rtnl_locked);
 716         } else {
 717                 /* Only p2p device interfaces which get dynamically created
 718                  * end up here. In this case the p2p module should be informed
 719                  * about the removal of the interface within the firmware. If
 720                  * not then p2p commands towards the firmware will cause some
 721                  * serious troublesome side effects. The p2p module will clean
 722                  * up the ifp if needed.
 723                  */
 724                 brcmf_p2p_ifp_removed(ifp, rtnl_locked);
 725                 kfree(ifp);
 726         }
 727
 728         drvr->iflist[bsscfgidx] = NULL;
 729         if (drvr->if2bss[ifidx] == bsscfgidx)
 730                 drvr->if2bss[ifidx] = BRCMF_BSSIDX_INVALID;
 731 }
 732
 733 void brcmf_remove_interface(struct brcmf_if *ifp, bool rtnl_locked)
 734 {
 735         if (!ifp || WARN_ON(ifp->drvr->iflist[ifp->bsscfgidx] != ifp))
 736                 return;
 737         brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, ifidx=%d\n", ifp->bsscfgidx,
 738                   ifp->ifidx);
 739         brcmf_fws_del_interface(ifp);
 740         brcmf_del_if(ifp->drvr, ifp->bsscfgidx, rtnl_locked);
 741 }
 742
 743 #ifdef CONFIG_INET
 744 #define ARPOL_MAX_ENTRIES       8
 745 static int brcmf_inetaddr_changed(struct notifier_block *nb,
 746                                   unsigned long action, void *data)
 747 {
 748         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 749                                               inetaddr_notifier);
 750         struct in_ifaddr *ifa = data;
 751         struct net_device *ndev = ifa->ifa_dev->dev;
 752         struct brcmf_if *ifp;
 753         int idx, i, ret;
 754         u32 val;
 755         __be32 addr_table[ARPOL_MAX_ENTRIES] = {0};
 756
 757         /* Find out if the notification is meant for us */
 758         for (idx = 0; idx < BRCMF_MAX_IFS; idx++) {
 759                 ifp = drvr->iflist[idx];
 760                 if (ifp && ifp->ndev == ndev)
 761                         break;
 762                 if (idx == BRCMF_MAX_IFS - 1)
 763                         return NOTIFY_DONE;
 764         }
 765
 766         /* check if arp offload is supported */
 767         ret = brcmf_fil_iovar_int_get(ifp, "arpoe", &val);
 768         if (ret)
 769                 return NOTIFY_OK;
 770
 771         /* old version only support primary index */
 772         ret = brcmf_fil_iovar_int_get(ifp, "arp_version", &val);
 773         if (ret)
 774                 val = 1;
 775         if (val == 1)
 776                 ifp = drvr->iflist[0];
 777
 778         /* retrieve the table from firmware */
 779         ret = brcmf_fil_iovar_data_get(ifp, "arp_hostip", addr_table,
 780                                        sizeof(addr_table));
 781         if (ret) {
 782                 brcmf_err("fail to get arp ip table err:%d\n", ret);
 783                 return NOTIFY_OK;
 784         }
 785
 786         for (i = 0; i < ARPOL_MAX_ENTRIES; i++)
 787                 if (ifa->ifa_address == addr_table[i])
 788                         break;
 789
 790         switch (action) {
 791         case NETDEV_UP:
 792                 if (i == ARPOL_MAX_ENTRIES) {
 793                         brcmf_dbg(TRACE, "add %pI4 to arp table\n",
 794                                   &ifa->ifa_address);
 795                         /* set it directly */
 796                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 797                                 &ifa->ifa_address, sizeof(ifa->ifa_address));
 798                         if (ret)
 799                                 brcmf_err("add arp ip err %d\n", ret);
 800                 }
 801                 break;
 802         case NETDEV_DOWN:
 803                 if (i < ARPOL_MAX_ENTRIES) {
 804                         addr_table[i] = 0;
 805                         brcmf_dbg(TRACE, "remove %pI4 from arp table\n",
 806                                   &ifa->ifa_address);
 807                         /* clear the table in firmware */
 808                         ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear",
 809                                                        NULL, 0);
 810                         if (ret) {
 811                                 brcmf_err("fail to clear arp ip table err:%d\n",
 812                                           ret);
 813                                 return NOTIFY_OK;
 814                         }
 815                         for (i = 0; i < ARPOL_MAX_ENTRIES; i++) {
 816                                 if (addr_table[i] == 0)
 817                                         continue;
 818                                 ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",
 819                                                                &addr_table[i],
 820                                                                sizeof(addr_table[i]));
 821                                 if (ret)
 822                                         brcmf_err("add arp ip err %d\n",
 823                                                   ret);
 824                         }
 825                 }
 826                 break;
 827         default:
 828                 break;
 829         }
 830
 831         return NOTIFY_OK;
 832 }
 833 #endif
 834
 835 #if IS_ENABLED(CONFIG_IPV6)
 836 static int brcmf_inet6addr_changed(struct notifier_block *nb,
 837                                    unsigned long action, void *data)
 838 {
 839         struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,
 840                                               inet6addr_notifier);
 841         struct inet6_ifaddr *ifa = data;
 842         struct brcmf_if *ifp;
 843         int i;
 844         struct in6_addr *table;
 845
 846         /* Only handle primary interface */
 847         ifp = drvr->iflist[0];
 848         if (!ifp)
 849                 return NOTIFY_DONE;
 850         if (ifp->ndev != ifa->idev->dev)
 851                 return NOTIFY_DONE;
 852
 853         table = ifp->ipv6_addr_tbl;
 854         for (i = 0; i < NDOL_MAX_ENTRIES; i++)
 855                 if (ipv6_addr_equal(&ifa->addr, &table[i]))
 856                         break;
 857
 858         switch (action) {
 859         case NETDEV_UP:
 860                 if (i == NDOL_MAX_ENTRIES) {
 861                         if (ifp->ipv6addr_idx < NDOL_MAX_ENTRIES) {
 862                                 table[ifp->ipv6addr_idx++] = ifa->addr;
 863                         } else {
 864                                 for (i = 0; i < NDOL_MAX_ENTRIES - 1; i++)
 865                                         table[i] = table[i + 1];
 866                                 table[NDOL_MAX_ENTRIES - 1] = ifa->addr;
 867                         }
 868                 }
 869                 break;
 870         case NETDEV_DOWN:
 871                 if (i < NDOL_MAX_ENTRIES) {
 872                         for (; i < ifp->ipv6addr_idx - 1; i++)
 873                                 table[i] = table[i + 1];
 874                         memset(&table[i], 0, sizeof(table[i]));
 875                         ifp->ipv6addr_idx--;
 876                 }
 877                 break;
 878         default:
 879                 break;
 880         }
 881
 882         schedule_work(&ifp->ndoffload_work);
 883
 884         return NOTIFY_OK;
 885 }
 886 #endif
 887
 888 int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 889 {
 890         struct brcmf_pub *drvr = NULL;
 891         int ret = 0;
 892         int i;
 893
 894         brcmf_dbg(TRACE, "Enter\n");
 895
 896         /* Allocate primary brcmf_info */
 897         drvr = kzalloc(sizeof(struct brcmf_pub), GFP_ATOMIC);
 898         if (!drvr)
 899                 return -ENOMEM;
 900
 901         for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
 902                 drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
 903
 904         mutex_init(&drvr->proto_block);
 905
 906         /* Link to bus module */
 907         drvr->hdrlen = 0;
 908         drvr->bus_if = dev_get_drvdata(dev);
 909         drvr->bus_if->drvr = drvr;
 910         drvr->settings = settings;
 911
 912         /* attach debug facilities */
 913         brcmf_debug_attach(drvr);
 914
 915         /* Attach and link in the protocol */
 916         ret = brcmf_proto_attach(drvr);
 917         if (ret != 0) {
 918                 brcmf_err("brcmf_prot_attach failed\n");
 919                 goto fail;
 920         }
 921
 922         /* attach firmware event handler */
 923         brcmf_fweh_attach(drvr);
 924
 925         return ret;
 926
 927 fail:
 928         brcmf_detach(dev);
 929
 930         return ret;
 931 }
 932
 933 static int brcmf_revinfo_read(struct seq_file *s, void *data)
 934 {
 935         struct brcmf_bus *bus_if = dev_get_drvdata(s->private);
 936         struct brcmf_rev_info *ri = &bus_if->drvr->revinfo;
 937         char drev[BRCMU_DOTREV_LEN];
 938         char brev[BRCMU_BOARDREV_LEN];
 939
 940         seq_printf(s, "vendorid: 0x%04x\n", ri->vendorid);
 941         seq_printf(s, "deviceid: 0x%04x\n", ri->deviceid);
 942         seq_printf(s, "radiorev: %s\n", brcmu_dotrev_str(ri->radiorev, drev));
 943         seq_printf(s, "chipnum: %u (%x)\n", ri->chipnum, ri->chipnum);
 944         seq_printf(s, "chiprev: %u\n", ri->chiprev);
 945         seq_printf(s, "chippkg: %u\n", ri->chippkg);
 946         seq_printf(s, "corerev: %u\n", ri->corerev);
 947         seq_printf(s, "boardid: 0x%04x\n", ri->boardid);
 948         seq_printf(s, "boardvendor: 0x%04x\n", ri->boardvendor);
 949         seq_printf(s, "boardrev: %s\n", brcmu_boardrev_str(ri->boardrev, brev));
 950         seq_printf(s, "driverrev: %s\n", brcmu_dotrev_str(ri->driverrev, drev));
 951         seq_printf(s, "ucoderev: %u\n", ri->ucoderev);
 952         seq_printf(s, "bus: %u\n", ri->bus);
 953         seq_printf(s, "phytype: %u\n", ri->phytype);
 954         seq_printf(s, "phyrev: %u\n", ri->phyrev);
 955         seq_printf(s, "anarev: %u\n", ri->anarev);
 956         seq_printf(s, "nvramrev: %08x\n", ri->nvramrev);
 957
 958         return 0;
 959 }
 960
 961 int brcmf_bus_start(struct device *dev)
 962 {
 963         int ret = -1;
 964         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 965         struct brcmf_pub *drvr = bus_if->drvr;
 966         struct brcmf_if *ifp;
 967         struct brcmf_if *p2p_ifp;
 968
 969         brcmf_dbg(TRACE, "\n");
 970
 971         /* add primary networking interface */
 972         ifp = brcmf_add_if(drvr, 0, 0, false, "wlan%d", NULL);
 973         if (IS_ERR(ifp))
 974                 return PTR_ERR(ifp);
 975
 976         p2p_ifp = NULL;
 977
 978         /* signal bus ready */
 979         brcmf_bus_change_state(bus_if, BRCMF_BUS_UP);
 980
 981         /* Bus is ready, do any initialization */
 982         ret = brcmf_c_preinit_dcmds(ifp);
 983         if (ret < 0)
 984                 goto fail;
 985
 986         brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
 987
 988         /* assure we have chipid before feature attach */
 989         if (!bus_if->chip) {
 990                 bus_if->chip = drvr->revinfo.chipnum;
 991                 bus_if->chiprev = drvr->revinfo.chiprev;
 992                 brcmf_dbg(INFO, "firmware revinfo: chip %x (%d) rev %d\n",
 993                           bus_if->chip, bus_if->chip, bus_if->chiprev);
 994         }
 995         brcmf_feat_attach(drvr);
 996
 997         ret = brcmf_fws_init(drvr);
 998         if (ret < 0)
 999                 goto fail;
1000
1001         brcmf_fws_add_interface(ifp);
1002
1003         drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev,
1004                                              drvr->settings->p2p_enable);
1005         if (drvr->config == NULL) {
1006                 ret = -ENOMEM;
1007                 goto fail;
1008         }
1009
1010         ret = brcmf_net_attach(ifp, false);
1011
1012         if ((!ret) && (drvr->settings->p2p_enable)) {
1013                 p2p_ifp = drvr->iflist[1];
1014                 if (p2p_ifp)
1015                         ret = brcmf_net_p2p_attach(p2p_ifp);
1016         }
1017
1018         if (ret)
1019                 goto fail;
1020
1021 #ifdef CONFIG_INET
1022         drvr->inetaddr_notifier.notifier_call = brcmf_inetaddr_changed;
1023         ret = register_inetaddr_notifier(&drvr->inetaddr_notifier);
1024         if (ret)
1025                 goto fail;
1026
1027 #if IS_ENABLED(CONFIG_IPV6)
1028         drvr->inet6addr_notifier.notifier_call = brcmf_inet6addr_changed;
1029         ret = register_inet6addr_notifier(&drvr->inet6addr_notifier);
1030         if (ret) {
1031                 unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1032                 goto fail;
1033         }
1034 #endif
1035 #endif /* CONFIG_INET */
1036
1037         return 0;
1038
1039 fail:
1040         brcmf_err("failed: %d\n", ret);
1041         if (drvr->config) {
1042                 brcmf_cfg80211_detach(drvr->config);
1043                 drvr->config = NULL;
1044         }
1045         if (drvr->fws) {
1046                 brcmf_fws_del_interface(ifp);
1047                 brcmf_fws_deinit(drvr);
1048         }
1049         brcmf_net_detach(ifp->ndev, false);
1050         if (p2p_ifp)
1051                 brcmf_net_detach(p2p_ifp->ndev, false);
1052         drvr->iflist[0] = NULL;
1053         drvr->iflist[1] = NULL;
1054         if (drvr->settings->ignore_probe_fail)
1055                 ret = 0;
1056
1057         return ret;
1058 }
1059
1060 void brcmf_bus_add_txhdrlen(struct device *dev, uint len)
1061 {
1062         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1063         struct brcmf_pub *drvr = bus_if->drvr;
1064
1065         if (drvr) {
1066                 drvr->hdrlen += len;
1067         }
1068 }
1069
1070 static void brcmf_bus_detach(struct brcmf_pub *drvr)
1071 {
1072         brcmf_dbg(TRACE, "Enter\n");
1073
1074         if (drvr) {
1075                 /* Stop the bus module */
1076                 brcmf_bus_stop(drvr->bus_if);
1077         }
1078 }
1079
1080 void brcmf_dev_reset(struct device *dev)
1081 {
1082         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1083         struct brcmf_pub *drvr = bus_if->drvr;
1084
1085         if (drvr == NULL)
1086                 return;
1087
1088         if (drvr->iflist[0])
1089                 brcmf_fil_cmd_int_set(drvr->iflist[0], BRCMF_C_TERMINATED, 1);
1090 }
1091
1092 void brcmf_detach(struct device *dev)
1093 {
1094         s32 i;
1095         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1096         struct brcmf_pub *drvr = bus_if->drvr;
1097
1098         brcmf_dbg(TRACE, "Enter\n");
1099
1100         if (drvr == NULL)
1101                 return;
1102
1103 #ifdef CONFIG_INET
1104         unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
1105 #endif
1106
1107 #if IS_ENABLED(CONFIG_IPV6)
1108         unregister_inet6addr_notifier(&drvr->inet6addr_notifier);
1109 #endif
1110
1111         /* stop firmware event handling */
1112         brcmf_fweh_detach(drvr);
1113         if (drvr->config)
1114                 brcmf_p2p_detach(&drvr->config->p2p);
1115
1116         brcmf_bus_change_state(bus_if, BRCMF_BUS_DOWN);
1117
1118         /* make sure primary interface removed last */
1119         for (i = BRCMF_MAX_IFS-1; i > -1; i--)
1120                 brcmf_remove_interface(drvr->iflist[i], false);
1121
1122         brcmf_cfg80211_detach(drvr->config);
1123
1124         brcmf_fws_deinit(drvr);
1125
1126         brcmf_bus_detach(drvr);
1127
1128         brcmf_proto_detach(drvr);
1129
1130         brcmf_debug_detach(drvr);
1131         bus_if->drvr = NULL;
1132         kfree(drvr);
1133 }
1134
1135 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len)
1136 {
1137         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1138         struct brcmf_if *ifp = bus_if->drvr->iflist[0];
1139
1140         return brcmf_fil_iovar_data_set(ifp, name, data, len);
1141 }
1142
1143 static int brcmf_get_pend_8021x_cnt(struct brcmf_if *ifp)
1144 {
1145         return atomic_read(&ifp->pend_8021x_cnt);
1146 }
1147
1148 int brcmf_netdev_wait_pend8021x(struct brcmf_if *ifp)
1149 {
1150         int err;
1151
1152         err = wait_event_timeout(ifp->pend_8021x_wait,
1153                                  !brcmf_get_pend_8021x_cnt(ifp),
1154                                  MAX_WAIT_FOR_8021X_TX);
1155
1156         if (!err)
1157                 brcmf_err("Timed out waiting for no pending 802.1x packets\n");
1158
1159         return !err;
1160 }
1161
1162 void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state)
1163 {
1164         struct brcmf_pub *drvr = bus->drvr;
1165         struct net_device *ndev;
1166         int ifidx;
1167
1168         brcmf_dbg(TRACE, "%d -> %d\n", bus->state, state);
1169         bus->state = state;
1170
1171         if (state == BRCMF_BUS_UP) {
1172                 for (ifidx = 0; ifidx < BRCMF_MAX_IFS; ifidx++) {
1173                         if ((drvr->iflist[ifidx]) &&
1174                             (drvr->iflist[ifidx]->ndev)) {
1175                                 ndev = drvr->iflist[ifidx]->ndev;
1176                                 if (netif_queue_stopped(ndev))
1177                                         netif_wake_queue(ndev);
1178                         }
1179                 }
1180         }
1181 }
1182
1183 static void brcmf_driver_register(struct work_struct *work)
1184 {
1185 #ifdef CONFIG_BRCMFMAC_SDIO
1186         brcmf_sdio_register();
1187 #endif
1188 #ifdef CONFIG_BRCMFMAC_USB
1189         brcmf_usb_register();
1190 #endif
1191 #ifdef CONFIG_BRCMFMAC_PCIE
1192         brcmf_pcie_register();
1193 #endif
1194 }
1195 static DECLARE_WORK(brcmf_driver_work, brcmf_driver_register);
1196
1197 int __init brcmf_core_init(void)
1198 {
1199         if (!schedule_work(&brcmf_driver_work))
1200                 return -EBUSY;
1201
1202         return 0;
1203 }
1204
1205 void __exit brcmf_core_exit(void)
1206 {
1207         cancel_work_sync(&brcmf_driver_work);
1208
1209 #ifdef CONFIG_BRCMFMAC_SDIO
1210         brcmf_sdio_exit();
1211 #endif
1212 #ifdef CONFIG_BRCMFMAC_USB
1213         brcmf_usb_exit();
1214 #endif
1215 #ifdef CONFIG_BRCMFMAC_PCIE
1216         brcmf_pcie_exit();
1217 #endif
1218 }
1219