drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.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/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/kthread.h>
  20 #include <linux/slab.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/mmc/sdio_func.h>
  25 #include <linux/random.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/ethtool.h>
  28 #include <linux/fcntl.h>
  29 #include <linux/fs.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/hardirq.h>
  32 #include <linux/mutex.h>
  33 #include <linux/wait.h>
  34 #include <linux/module.h>
  35 #include <net/cfg80211.h>
  36 #include <net/rtnetlink.h>
  37 #include <defs.h>
  38 #include <brcmu_utils.h>
  39 #include <brcmu_wifi.h>
  40
  41 #include "dhd.h"
  42 #include "dhd_bus.h"
  43 #include "dhd_proto.h"
  44 #include "dhd_dbg.h"
  45 #include "wl_cfg80211.h"
  46
  47 MODULE_AUTHOR("Broadcom Corporation");
  48 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN fullmac driver.");
  49 MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN fullmac cards");
  50 MODULE_LICENSE("Dual BSD/GPL");
  51
  52
  53 /* Interface control information */
  54 struct brcmf_if {
  55         struct brcmf_info *info;        /* back pointer to brcmf_info */
  56         /* OS/stack specifics */
  57         struct net_device *ndev;
  58         struct net_device_stats stats;
  59         int idx;                /* iface idx in dongle */
  60         u8 mac_addr[ETH_ALEN];  /* assigned MAC address */
  61 };
  62
  63 /* Local private structure (extension of pub) */
  64 struct brcmf_info {
  65         struct brcmf_pub pub;
  66
  67         /* OS/stack specifics */
  68         struct brcmf_if *iflist[BRCMF_MAX_IFS];
  69
  70         struct mutex proto_block;
  71
  72         struct work_struct setmacaddr_work;
  73         struct work_struct multicast_work;
  74         u8 macvalue[ETH_ALEN];
  75         atomic_t pend_8021x_cnt;
  76 };
  77
  78 /* Error bits */
  79 int brcmf_msg_level = BRCMF_ERROR_VAL;
  80 module_param(brcmf_msg_level, int, 0);
  81
  82 int brcmf_ifname2idx(struct brcmf_info *drvr_priv, char *name)
  83 {
  84         int i = BRCMF_MAX_IFS;
  85         struct brcmf_if *ifp;
  86
  87         if (name == NULL || *name == '\0')
  88                 return 0;
  89
  90         while (--i > 0) {
  91                 ifp = drvr_priv->iflist[i];
  92                 if (ifp && !strncmp(ifp->ndev->name, name, IFNAMSIZ))
  93                         break;
  94         }
  95
  96         brcmf_dbg(TRACE, "return idx %d for \"%s\"\n", i, name);
  97
  98         return i;               /* default - the primary interface */
  99 }
 100
 101 char *brcmf_ifname(struct brcmf_pub *drvr, int ifidx)
 102 {
 103         struct brcmf_info *drvr_priv = drvr->info;
 104
 105         if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) {
 106                 brcmf_dbg(ERROR, "ifidx %d out of range\n", ifidx);
 107                 return "<if_bad>";
 108         }
 109
 110         if (drvr_priv->iflist[ifidx] == NULL) {
 111                 brcmf_dbg(ERROR, "null i/f %d\n", ifidx);
 112                 return "<if_null>";
 113         }
 114
 115         if (drvr_priv->iflist[ifidx]->ndev)
 116                 return drvr_priv->iflist[ifidx]->ndev->name;
 117
 118         return "<if_none>";
 119 }
 120
 121 static void _brcmf_set_multicast_list(struct work_struct *work)
 122 {
 123         struct net_device *ndev;
 124         struct netdev_hw_addr *ha;
 125         u32 dcmd_value, cnt;
 126         __le32 cnt_le;
 127         __le32 dcmd_le_value;
 128
 129         struct brcmf_dcmd dcmd;
 130         char *buf, *bufp;
 131         uint buflen;
 132         int ret;
 133
 134         struct brcmf_info *drvr_priv = container_of(work, struct brcmf_info,
 135                                                     multicast_work);
 136
 137         ndev = drvr_priv->iflist[0]->ndev;
 138         cnt = netdev_mc_count(ndev);
 139
 140         /* Determine initial value of allmulti flag */
 141         dcmd_value = (ndev->flags & IFF_ALLMULTI) ? true : false;
 142
 143         /* Send down the multicast list first. */
 144
 145         buflen = sizeof("mcast_list") + sizeof(cnt) + (cnt * ETH_ALEN);
 146         bufp = buf = kmalloc(buflen, GFP_ATOMIC);
 147         if (!bufp)
 148                 return;
 149
 150         strcpy(bufp, "mcast_list");
 151         bufp += strlen("mcast_list") + 1;
 152
 153         cnt_le = cpu_to_le32(cnt);
 154         memcpy(bufp, &cnt_le, sizeof(cnt));
 155         bufp += sizeof(cnt_le);
 156
 157         netdev_for_each_mc_addr(ha, ndev) {
 158                 if (!cnt)
 159                         break;
 160                 memcpy(bufp, ha->addr, ETH_ALEN);
 161                 bufp += ETH_ALEN;
 162                 cnt--;
 163         }
 164
 165         memset(&dcmd, 0, sizeof(dcmd));
 166         dcmd.cmd = BRCMF_C_SET_VAR;
 167         dcmd.buf = buf;
 168         dcmd.len = buflen;
 169         dcmd.set = true;
 170
 171         ret = brcmf_proto_dcmd(&drvr_priv->pub, 0, &dcmd, dcmd.len);
 172         if (ret < 0) {
 173                 brcmf_dbg(ERROR, "%s: set mcast_list failed, cnt %d\n",
 174                           brcmf_ifname(&drvr_priv->pub, 0), cnt);
 175                 dcmd_value = cnt ? true : dcmd_value;
 176         }
 177
 178         kfree(buf);
 179
 180         /* Now send the allmulti setting.  This is based on the setting in the
 181          * net_device flags, but might be modified above to be turned on if we
 182          * were trying to set some addresses and dongle rejected it...
 183          */
 184
 185         buflen = sizeof("allmulti") + sizeof(dcmd_value);
 186         buf = kmalloc(buflen, GFP_ATOMIC);
 187         if (!buf)
 188                 return;
 189
 190         dcmd_le_value = cpu_to_le32(dcmd_value);
 191
 192         if (!brcmf_c_mkiovar
 193             ("allmulti", (void *)&dcmd_le_value,
 194             sizeof(dcmd_le_value), buf, buflen)) {
 195                 brcmf_dbg(ERROR, "%s: mkiovar failed for allmulti, datalen %d buflen %u\n",
 196                           brcmf_ifname(&drvr_priv->pub, 0),
 197                           (int)sizeof(dcmd_value), buflen);
 198                 kfree(buf);
 199                 return;
 200         }
 201
 202         memset(&dcmd, 0, sizeof(dcmd));
 203         dcmd.cmd = BRCMF_C_SET_VAR;
 204         dcmd.buf = buf;
 205         dcmd.len = buflen;
 206         dcmd.set = true;
 207
 208         ret = brcmf_proto_dcmd(&drvr_priv->pub, 0, &dcmd, dcmd.len);
 209         if (ret < 0) {
 210                 brcmf_dbg(ERROR, "%s: set allmulti %d failed\n",
 211                           brcmf_ifname(&drvr_priv->pub, 0),
 212                           le32_to_cpu(dcmd_le_value));
 213         }
 214
 215         kfree(buf);
 216
 217         /* Finally, pick up the PROMISC flag as well, like the NIC
 218                  driver does */
 219
 220         dcmd_value = (ndev->flags & IFF_PROMISC) ? true : false;
 221         dcmd_le_value = cpu_to_le32(dcmd_value);
 222
 223         memset(&dcmd, 0, sizeof(dcmd));
 224         dcmd.cmd = BRCMF_C_SET_PROMISC;
 225         dcmd.buf = &dcmd_le_value;
 226         dcmd.len = sizeof(dcmd_le_value);
 227         dcmd.set = true;
 228
 229         ret = brcmf_proto_dcmd(&drvr_priv->pub, 0, &dcmd, dcmd.len);
 230         if (ret < 0) {
 231                 brcmf_dbg(ERROR, "%s: set promisc %d failed\n",
 232                           brcmf_ifname(&drvr_priv->pub, 0),
 233                           le32_to_cpu(dcmd_le_value));
 234         }
 235 }
 236
 237 static void
 238 _brcmf_set_mac_address(struct work_struct *work)
 239 {
 240         char buf[32];
 241         struct brcmf_dcmd dcmd;
 242         int ret;
 243
 244         struct brcmf_info *drvr_priv = container_of(work, struct brcmf_info,
 245                                                     setmacaddr_work);
 246
 247         brcmf_dbg(TRACE, "enter\n");
 248         if (!brcmf_c_mkiovar("cur_etheraddr", (char *)drvr_priv->macvalue,
 249                            ETH_ALEN, buf, 32)) {
 250                 brcmf_dbg(ERROR, "%s: mkiovar failed for cur_etheraddr\n",
 251                           brcmf_ifname(&drvr_priv->pub, 0));
 252                 return;
 253         }
 254         memset(&dcmd, 0, sizeof(dcmd));
 255         dcmd.cmd = BRCMF_C_SET_VAR;
 256         dcmd.buf = buf;
 257         dcmd.len = 32;
 258         dcmd.set = true;
 259
 260         ret = brcmf_proto_dcmd(&drvr_priv->pub, 0, &dcmd, dcmd.len);
 261         if (ret < 0)
 262                 brcmf_dbg(ERROR, "%s: set cur_etheraddr failed\n",
 263                           brcmf_ifname(&drvr_priv->pub, 0));
 264         else
 265                 memcpy(drvr_priv->iflist[0]->ndev->dev_addr,
 266                        drvr_priv->macvalue, ETH_ALEN);
 267
 268         return;
 269 }
 270
 271 static int brcmf_netdev_set_mac_address(struct net_device *ndev, void *addr)
 272 {
 273         struct brcmf_if *ifp = netdev_priv(ndev);
 274         struct brcmf_info *drvr_priv = ifp->info;
 275         struct sockaddr *sa = (struct sockaddr *)addr;
 276
 277         memcpy(&drvr_priv->macvalue, sa->sa_data, ETH_ALEN);
 278         schedule_work(&drvr_priv->setmacaddr_work);
 279         return 0;
 280 }
 281
 282 static void brcmf_netdev_set_multicast_list(struct net_device *ndev)
 283 {
 284         struct brcmf_if *ifp = netdev_priv(ndev);
 285         struct brcmf_info *drvr_priv = ifp->info;
 286
 287         schedule_work(&drvr_priv->multicast_work);
 288 }
 289
 290 int brcmf_sendpkt(struct brcmf_pub *drvr, int ifidx, struct sk_buff *pktbuf)
 291 {
 292         struct brcmf_info *drvr_priv = drvr->info;
 293
 294         /* Reject if down */
 295         if (!drvr->up || (drvr->bus_if->state == BRCMF_BUS_DOWN))
 296                 return -ENODEV;
 297
 298         /* Update multicast statistic */
 299         if (pktbuf->len >= ETH_ALEN) {
 300                 u8 *pktdata = (u8 *) (pktbuf->data);
 301                 struct ethhdr *eh = (struct ethhdr *)pktdata;
 302
 303                 if (is_multicast_ether_addr(eh->h_dest))
 304                         drvr->tx_multicast++;
 305                 if (ntohs(eh->h_proto) == ETH_P_PAE)
 306                         atomic_inc(&drvr_priv->pend_8021x_cnt);
 307         }
 308
 309         /* If the protocol uses a data header, apply it */
 310         brcmf_proto_hdrpush(drvr, ifidx, pktbuf);
 311
 312         /* Use bus module to send data frame */
 313         return brcmf_sdbrcm_bus_txdata(drvr->dev, pktbuf);
 314 }
 315
 316 static int brcmf_netdev_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 317 {
 318         int ret;
 319         struct brcmf_if *ifp = netdev_priv(ndev);
 320         struct brcmf_info *drvr_priv = ifp->info;
 321
 322         brcmf_dbg(TRACE, "Enter\n");
 323
 324         /* Reject if down */
 325         if (!drvr_priv->pub.up ||
 326             (drvr_priv->pub.bus_if->state == BRCMF_BUS_DOWN)) {
 327                 brcmf_dbg(ERROR, "xmit rejected pub.up=%d state=%d\n",
 328                           drvr_priv->pub.up,
 329                           drvr_priv->pub.bus_if->state);
 330                 netif_stop_queue(ndev);
 331                 return -ENODEV;
 332         }
 333
 334         if (!drvr_priv->iflist[ifp->idx]) {
 335                 brcmf_dbg(ERROR, "bad ifidx %d\n", ifp->idx);
 336                 netif_stop_queue(ndev);
 337                 return -ENODEV;
 338         }
 339
 340         /* Make sure there's enough room for any header */
 341         if (skb_headroom(skb) < drvr_priv->pub.hdrlen) {
 342                 struct sk_buff *skb2;
 343
 344                 brcmf_dbg(INFO, "%s: insufficient headroom\n",
 345                           brcmf_ifname(&drvr_priv->pub, ifp->idx));
 346                 drvr_priv->pub.tx_realloc++;
 347                 skb2 = skb_realloc_headroom(skb, drvr_priv->pub.hdrlen);
 348                 dev_kfree_skb(skb);
 349                 skb = skb2;
 350                 if (skb == NULL) {
 351                         brcmf_dbg(ERROR, "%s: skb_realloc_headroom failed\n",
 352                                   brcmf_ifname(&drvr_priv->pub, ifp->idx));
 353                         ret = -ENOMEM;
 354                         goto done;
 355                 }
 356         }
 357
 358         ret = brcmf_sendpkt(&drvr_priv->pub, ifp->idx, skb);
 359
 360 done:
 361         if (ret)
 362                 drvr_priv->pub.dstats.tx_dropped++;
 363         else
 364                 drvr_priv->pub.tx_packets++;
 365
 366         /* Return ok: we always eat the packet */
 367         return 0;
 368 }
 369
 370 void brcmf_txflowcontrol(struct brcmf_pub *drvr, int ifidx, bool state)
 371 {
 372         struct net_device *ndev;
 373         struct brcmf_info *drvr_priv = drvr->info;
 374
 375         brcmf_dbg(TRACE, "Enter\n");
 376
 377         drvr->txoff = state;
 378         ndev = drvr_priv->iflist[ifidx]->ndev;
 379         if (state == ON)
 380                 netif_stop_queue(ndev);
 381         else
 382                 netif_wake_queue(ndev);
 383 }
 384
 385 static int brcmf_host_event(struct brcmf_info *drvr_priv, int *ifidx,
 386                             void *pktdata, struct brcmf_event_msg *event,
 387                             void **data)
 388 {
 389         int bcmerror = 0;
 390
 391         bcmerror = brcmf_c_host_event(drvr_priv, ifidx, pktdata, event, data);
 392         if (bcmerror != 0)
 393                 return bcmerror;
 394
 395         if (drvr_priv->iflist[*ifidx]->ndev)
 396                 brcmf_cfg80211_event(drvr_priv->iflist[*ifidx]->ndev,
 397                                      event, *data);
 398
 399         return bcmerror;
 400 }
 401
 402 void brcmf_rx_frame(struct brcmf_pub *drvr, int ifidx,
 403                     struct sk_buff_head *skb_list)
 404 {
 405         struct brcmf_info *drvr_priv = drvr->info;
 406         unsigned char *eth;
 407         uint len;
 408         void *data;
 409         struct sk_buff *skb, *pnext;
 410         struct brcmf_if *ifp;
 411         struct brcmf_event_msg event;
 412
 413         brcmf_dbg(TRACE, "Enter\n");
 414
 415         skb_queue_walk_safe(skb_list, skb, pnext) {
 416                 skb_unlink(skb, skb_list);
 417
 418                 /* Get the protocol, maintain skb around eth_type_trans()
 419                  * The main reason for this hack is for the limitation of
 420                  * Linux 2.4 where 'eth_type_trans' uses the
 421                  * 'net->hard_header_len'
 422                  * to perform skb_pull inside vs ETH_HLEN. Since to avoid
 423                  * coping of the packet coming from the network stack to add
 424                  * BDC, Hardware header etc, during network interface
 425                  * registration
 426                  * we set the 'net->hard_header_len' to ETH_HLEN + extra space
 427                  * required
 428                  * for BDC, Hardware header etc. and not just the ETH_HLEN
 429                  */
 430                 eth = skb->data;
 431                 len = skb->len;
 432
 433                 ifp = drvr_priv->iflist[ifidx];
 434                 if (ifp == NULL)
 435                         ifp = drvr_priv->iflist[0];
 436
 437                 if (!ifp || !ifp->ndev ||
 438                     ifp->ndev->reg_state != NETREG_REGISTERED) {
 439                         brcmu_pkt_buf_free_skb(skb);
 440                         continue;
 441                 }
 442
 443                 skb->dev = ifp->ndev;
 444                 skb->protocol = eth_type_trans(skb, skb->dev);
 445
 446                 if (skb->pkt_type == PACKET_MULTICAST)
 447                         drvr_priv->pub.rx_multicast++;
 448
 449                 skb->data = eth;
 450                 skb->len = len;
 451
 452                 /* Strip header, count, deliver upward */
 453                 skb_pull(skb, ETH_HLEN);
 454
 455                 /* Process special event packets and then discard them */
 456                 if (ntohs(skb->protocol) == ETH_P_LINK_CTL)
 457                         brcmf_host_event(drvr_priv, &ifidx,
 458                                           skb_mac_header(skb),
 459                                           &event, &data);
 460
 461                 if (drvr_priv->iflist[ifidx]) {
 462                         ifp = drvr_priv->iflist[ifidx];
 463                         ifp->ndev->last_rx = jiffies;
 464                 }
 465
 466                 drvr->dstats.rx_bytes += skb->len;
 467                 drvr->rx_packets++;     /* Local count */
 468
 469                 if (in_interrupt())
 470                         netif_rx(skb);
 471                 else
 472                         /* If the receive is not processed inside an ISR,
 473                          * the softirqd must be woken explicitly to service
 474                          * the NET_RX_SOFTIRQ.  In 2.6 kernels, this is handled
 475                          * by netif_rx_ni(), but in earlier kernels, we need
 476                          * to do it manually.
 477                          */
 478                         netif_rx_ni(skb);
 479         }
 480 }
 481
 482 void brcmf_txcomplete(struct brcmf_pub *drvr, struct sk_buff *txp, bool success)
 483 {
 484         uint ifidx;
 485         struct brcmf_info *drvr_priv = drvr->info;
 486         struct ethhdr *eh;
 487         u16 type;
 488
 489         brcmf_proto_hdrpull(drvr, &ifidx, txp);
 490
 491         eh = (struct ethhdr *)(txp->data);
 492         type = ntohs(eh->h_proto);
 493
 494         if (type == ETH_P_PAE)
 495                 atomic_dec(&drvr_priv->pend_8021x_cnt);
 496
 497 }
 498
 499 static struct net_device_stats *brcmf_netdev_get_stats(struct net_device *ndev)
 500 {
 501         struct brcmf_if *ifp = netdev_priv(ndev);
 502         struct brcmf_info *drvr_priv = ifp->info;
 503
 504         brcmf_dbg(TRACE, "Enter\n");
 505
 506         if (drvr_priv->pub.up)
 507                 /* Use the protocol to get dongle stats */
 508                 brcmf_proto_dstats(&drvr_priv->pub);
 509
 510         /* Copy dongle stats to net device stats */
 511         ifp->stats.rx_packets = drvr_priv->pub.dstats.rx_packets;
 512         ifp->stats.tx_packets = drvr_priv->pub.dstats.tx_packets;
 513         ifp->stats.rx_bytes = drvr_priv->pub.dstats.rx_bytes;
 514         ifp->stats.tx_bytes = drvr_priv->pub.dstats.tx_bytes;
 515         ifp->stats.rx_errors = drvr_priv->pub.dstats.rx_errors;
 516         ifp->stats.tx_errors = drvr_priv->pub.dstats.tx_errors;
 517         ifp->stats.rx_dropped = drvr_priv->pub.dstats.rx_dropped;
 518         ifp->stats.tx_dropped = drvr_priv->pub.dstats.tx_dropped;
 519         ifp->stats.multicast = drvr_priv->pub.dstats.multicast;
 520
 521         return &ifp->stats;
 522 }
 523
 524 /* Retrieve current toe component enables, which are kept
 525          as a bitmap in toe_ol iovar */
 526 static int brcmf_toe_get(struct brcmf_info *drvr_priv, int ifidx, u32 *toe_ol)
 527 {
 528         struct brcmf_dcmd dcmd;
 529         __le32 toe_le;
 530         char buf[32];
 531         int ret;
 532
 533         memset(&dcmd, 0, sizeof(dcmd));
 534
 535         dcmd.cmd = BRCMF_C_GET_VAR;
 536         dcmd.buf = buf;
 537         dcmd.len = (uint) sizeof(buf);
 538         dcmd.set = false;
 539
 540         strcpy(buf, "toe_ol");
 541         ret = brcmf_proto_dcmd(&drvr_priv->pub, ifidx, &dcmd, dcmd.len);
 542         if (ret < 0) {
 543                 /* Check for older dongle image that doesn't support toe_ol */
 544                 if (ret == -EIO) {
 545                         brcmf_dbg(ERROR, "%s: toe not supported by device\n",
 546                                   brcmf_ifname(&drvr_priv->pub, ifidx));
 547                         return -EOPNOTSUPP;
 548                 }
 549
 550                 brcmf_dbg(INFO, "%s: could not get toe_ol: ret=%d\n",
 551                           brcmf_ifname(&drvr_priv->pub, ifidx), ret);
 552                 return ret;
 553         }
 554
 555         memcpy(&toe_le, buf, sizeof(u32));
 556         *toe_ol = le32_to_cpu(toe_le);
 557         return 0;
 558 }
 559
 560 /* Set current toe component enables in toe_ol iovar,
 561          and set toe global enable iovar */
 562 static int brcmf_toe_set(struct brcmf_info *drvr_priv, int ifidx, u32 toe_ol)
 563 {
 564         struct brcmf_dcmd dcmd;
 565         char buf[32];
 566         int ret;
 567         __le32 toe_le = cpu_to_le32(toe_ol);
 568
 569         memset(&dcmd, 0, sizeof(dcmd));
 570
 571         dcmd.cmd = BRCMF_C_SET_VAR;
 572         dcmd.buf = buf;
 573         dcmd.len = (uint) sizeof(buf);
 574         dcmd.set = true;
 575
 576         /* Set toe_ol as requested */
 577         strcpy(buf, "toe_ol");
 578         memcpy(&buf[sizeof("toe_ol")], &toe_le, sizeof(u32));
 579
 580         ret = brcmf_proto_dcmd(&drvr_priv->pub, ifidx, &dcmd, dcmd.len);
 581         if (ret < 0) {
 582                 brcmf_dbg(ERROR, "%s: could not set toe_ol: ret=%d\n",
 583                           brcmf_ifname(&drvr_priv->pub, ifidx), ret);
 584                 return ret;
 585         }
 586
 587         /* Enable toe globally only if any components are enabled. */
 588         toe_le = cpu_to_le32(toe_ol != 0);
 589
 590         strcpy(buf, "toe");
 591         memcpy(&buf[sizeof("toe")], &toe_le, sizeof(u32));
 592
 593         ret = brcmf_proto_dcmd(&drvr_priv->pub, ifidx, &dcmd, dcmd.len);
 594         if (ret < 0) {
 595                 brcmf_dbg(ERROR, "%s: could not set toe: ret=%d\n",
 596                           brcmf_ifname(&drvr_priv->pub, ifidx), ret);
 597                 return ret;
 598         }
 599
 600         return 0;
 601 }
 602
 603 static void brcmf_ethtool_get_drvinfo(struct net_device *ndev,
 604                                     struct ethtool_drvinfo *info)
 605 {
 606         struct brcmf_if *ifp = netdev_priv(ndev);
 607         struct brcmf_info *drvr_priv = ifp->info;
 608
 609         sprintf(info->driver, KBUILD_MODNAME);
 610         sprintf(info->version, "%lu", drvr_priv->pub.drv_version);
 611         sprintf(info->bus_info, "%s",
 612                 dev_name(brcmf_bus_get_device(drvr_priv->pub.bus)));
 613 }
 614
 615 static struct ethtool_ops brcmf_ethtool_ops = {
 616         .get_drvinfo = brcmf_ethtool_get_drvinfo
 617 };
 618
 619 static int brcmf_ethtool(struct brcmf_info *drvr_priv, void __user *uaddr)
 620 {
 621         struct ethtool_drvinfo info;
 622         char drvname[sizeof(info.driver)];
 623         u32 cmd;
 624         struct ethtool_value edata;
 625         u32 toe_cmpnt, csum_dir;
 626         int ret;
 627
 628         brcmf_dbg(TRACE, "Enter\n");
 629
 630         /* all ethtool calls start with a cmd word */
 631         if (copy_from_user(&cmd, uaddr, sizeof(u32)))
 632                 return -EFAULT;
 633
 634         switch (cmd) {
 635         case ETHTOOL_GDRVINFO:
 636                 /* Copy out any request driver name */
 637                 if (copy_from_user(&info, uaddr, sizeof(info)))
 638                         return -EFAULT;
 639                 strncpy(drvname, info.driver, sizeof(info.driver));
 640                 drvname[sizeof(info.driver) - 1] = '\0';
 641
 642                 /* clear struct for return */
 643                 memset(&info, 0, sizeof(info));
 644                 info.cmd = cmd;
 645
 646                 /* if requested, identify ourselves */
 647                 if (strcmp(drvname, "?dhd") == 0) {
 648                         sprintf(info.driver, "dhd");
 649                         strcpy(info.version, BRCMF_VERSION_STR);
 650                 }
 651
 652                 /* otherwise, require dongle to be up */
 653                 else if (!drvr_priv->pub.up) {
 654                         brcmf_dbg(ERROR, "dongle is not up\n");
 655                         return -ENODEV;
 656                 }
 657
 658                 /* finally, report dongle driver type */
 659                 else if (drvr_priv->pub.iswl)
 660                         sprintf(info.driver, "wl");
 661                 else
 662                         sprintf(info.driver, "xx");
 663
 664                 sprintf(info.version, "%lu", drvr_priv->pub.drv_version);
 665                 if (copy_to_user(uaddr, &info, sizeof(info)))
 666                         return -EFAULT;
 667                 brcmf_dbg(CTL, "given %*s, returning %s\n",
 668                           (int)sizeof(drvname), drvname, info.driver);
 669                 break;
 670
 671                 /* Get toe offload components from dongle */
 672         case ETHTOOL_GRXCSUM:
 673         case ETHTOOL_GTXCSUM:
 674                 ret = brcmf_toe_get(drvr_priv, 0, &toe_cmpnt);
 675                 if (ret < 0)
 676                         return ret;
 677
 678                 csum_dir =
 679                     (cmd == ETHTOOL_GTXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;
 680
 681                 edata.cmd = cmd;
 682                 edata.data = (toe_cmpnt & csum_dir) ? 1 : 0;
 683
 684                 if (copy_to_user(uaddr, &edata, sizeof(edata)))
 685                         return -EFAULT;
 686                 break;
 687
 688                 /* Set toe offload components in dongle */
 689         case ETHTOOL_SRXCSUM:
 690         case ETHTOOL_STXCSUM:
 691                 if (copy_from_user(&edata, uaddr, sizeof(edata)))
 692                         return -EFAULT;
 693
 694                 /* Read the current settings, update and write back */
 695                 ret = brcmf_toe_get(drvr_priv, 0, &toe_cmpnt);
 696                 if (ret < 0)
 697                         return ret;
 698
 699                 csum_dir =
 700                     (cmd == ETHTOOL_STXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;
 701
 702                 if (edata.data != 0)
 703                         toe_cmpnt |= csum_dir;
 704                 else
 705                         toe_cmpnt &= ~csum_dir;
 706
 707                 ret = brcmf_toe_set(drvr_priv, 0, toe_cmpnt);
 708                 if (ret < 0)
 709                         return ret;
 710
 711                 /* If setting TX checksum mode, tell Linux the new mode */
 712                 if (cmd == ETHTOOL_STXCSUM) {
 713                         if (edata.data)
 714                                 drvr_priv->iflist[0]->ndev->features |=
 715                                     NETIF_F_IP_CSUM;
 716                         else
 717                                 drvr_priv->iflist[0]->ndev->features &=
 718                                     ~NETIF_F_IP_CSUM;
 719                 }
 720
 721                 break;
 722
 723         default:
 724                 return -EOPNOTSUPP;
 725         }
 726
 727         return 0;
 728 }
 729
 730 static int brcmf_netdev_ioctl_entry(struct net_device *ndev, struct ifreq *ifr,
 731                                     int cmd)
 732 {
 733         struct brcmf_if *ifp = netdev_priv(ndev);
 734         struct brcmf_info *drvr_priv = ifp->info;
 735
 736         brcmf_dbg(TRACE, "ifidx %d, cmd 0x%04x\n", ifp->idx, cmd);
 737
 738         if (!drvr_priv->iflist[ifp->idx])
 739                 return -1;
 740
 741         if (cmd == SIOCETHTOOL)
 742                 return brcmf_ethtool(drvr_priv, ifr->ifr_data);
 743
 744         return -EOPNOTSUPP;
 745 }
 746
 747 /* called only from within this driver. Sends a command to the dongle. */
 748 s32 brcmf_exec_dcmd(struct net_device *ndev, u32 cmd, void *arg, u32 len)
 749 {
 750         struct brcmf_dcmd dcmd;
 751         s32 err = 0;
 752         int buflen = 0;
 753         bool is_set_key_cmd;
 754         struct brcmf_if *ifp = netdev_priv(ndev);
 755         struct brcmf_info *drvr_priv = ifp->info;
 756
 757         memset(&dcmd, 0, sizeof(dcmd));
 758         dcmd.cmd = cmd;
 759         dcmd.buf = arg;
 760         dcmd.len = len;
 761
 762         if (dcmd.buf != NULL)
 763                 buflen = min_t(uint, dcmd.len, BRCMF_DCMD_MAXLEN);
 764
 765         /* send to dongle (must be up, and wl) */
 766         if ((drvr_priv->pub.bus_if->state != BRCMF_BUS_DATA)) {
 767                 brcmf_dbg(ERROR, "DONGLE_DOWN\n");
 768                 err = -EIO;
 769                 goto done;
 770         }
 771
 772         if (!drvr_priv->pub.iswl) {
 773                 err = -EIO;
 774                 goto done;
 775         }
 776
 777         /*
 778          * Intercept BRCMF_C_SET_KEY CMD - serialize M4 send and
 779          * set key CMD to prevent M4 encryption.
 780          */
 781         is_set_key_cmd = ((dcmd.cmd == BRCMF_C_SET_KEY) ||
 782                           ((dcmd.cmd == BRCMF_C_SET_VAR) &&
 783                            !(strncmp("wsec_key", dcmd.buf, 9))) ||
 784                           ((dcmd.cmd == BRCMF_C_SET_VAR) &&
 785                            !(strncmp("bsscfg:wsec_key", dcmd.buf, 15))));
 786         if (is_set_key_cmd)
 787                 brcmf_netdev_wait_pend8021x(ndev);
 788
 789         err = brcmf_proto_dcmd(&drvr_priv->pub, ifp->idx, &dcmd, buflen);
 790
 791 done:
 792         if (err > 0)
 793                 err = 0;
 794
 795         return err;
 796 }
 797
 798 static int brcmf_netdev_stop(struct net_device *ndev)
 799 {
 800         struct brcmf_if *ifp = netdev_priv(ndev);
 801         struct brcmf_pub *drvr = &ifp->info->pub;
 802
 803         brcmf_dbg(TRACE, "Enter\n");
 804         brcmf_cfg80211_down(drvr->config);
 805         if (drvr->up == 0)
 806                 return 0;
 807
 808         /* Set state and stop OS transmissions */
 809         drvr->up = 0;
 810         netif_stop_queue(ndev);
 811
 812         return 0;
 813 }
 814
 815 static int brcmf_netdev_open(struct net_device *ndev)
 816 {
 817         struct brcmf_if *ifp = netdev_priv(ndev);
 818         struct brcmf_info *drvr_priv = ifp->info;
 819         u32 toe_ol;
 820         s32 ret = 0;
 821
 822         brcmf_dbg(TRACE, "ifidx %d\n", ifp->idx);
 823
 824         if (ifp->idx == 0) {    /* do it only for primary eth0 */
 825                 /* try to bring up bus */
 826                 ret = brcmf_bus_start(&drvr_priv->pub);
 827                 if (ret != 0) {
 828                         brcmf_dbg(ERROR, "failed with code %d\n", ret);
 829                         return -1;
 830                 }
 831                 atomic_set(&drvr_priv->pend_8021x_cnt, 0);
 832
 833                 memcpy(ndev->dev_addr, drvr_priv->pub.mac, ETH_ALEN);
 834
 835                 /* Get current TOE mode from dongle */
 836                 if (brcmf_toe_get(drvr_priv, ifp->idx, &toe_ol) >= 0
 837                     && (toe_ol & TOE_TX_CSUM_OL) != 0)
 838                         drvr_priv->iflist[ifp->idx]->ndev->features |=
 839                                 NETIF_F_IP_CSUM;
 840                 else
 841                         drvr_priv->iflist[ifp->idx]->ndev->features &=
 842                                 ~NETIF_F_IP_CSUM;
 843         }
 844         /* Allow transmit calls */
 845         netif_start_queue(ndev);
 846         drvr_priv->pub.up = 1;
 847         if (brcmf_cfg80211_up(drvr_priv->pub.config)) {
 848                 brcmf_dbg(ERROR, "failed to bring up cfg80211\n");
 849                 return -1;
 850         }
 851
 852         return ret;
 853 }
 854
 855 static const struct net_device_ops brcmf_netdev_ops_pri = {
 856         .ndo_open = brcmf_netdev_open,
 857         .ndo_stop = brcmf_netdev_stop,
 858         .ndo_get_stats = brcmf_netdev_get_stats,
 859         .ndo_do_ioctl = brcmf_netdev_ioctl_entry,
 860         .ndo_start_xmit = brcmf_netdev_start_xmit,
 861         .ndo_set_mac_address = brcmf_netdev_set_mac_address,
 862         .ndo_set_rx_mode = brcmf_netdev_set_multicast_list
 863 };
 864
 865 int
 866 brcmf_add_if(struct brcmf_info *drvr_priv, int ifidx, char *name, u8 *mac_addr)
 867 {
 868         struct brcmf_if *ifp;
 869         struct net_device *ndev;
 870
 871         brcmf_dbg(TRACE, "idx %d\n", ifidx);
 872
 873         ifp = drvr_priv->iflist[ifidx];
 874         /*
 875          * Delete the existing interface before overwriting it
 876          * in case we missed the BRCMF_E_IF_DEL event.
 877          */
 878         if (ifp) {
 879                 brcmf_dbg(ERROR, "ERROR: netdev:%s already exists, try free & unregister\n",
 880                           ifp->ndev->name);
 881                 netif_stop_queue(ifp->ndev);
 882                 unregister_netdev(ifp->ndev);
 883                 free_netdev(ifp->ndev);
 884                 drvr_priv->iflist[ifidx] = NULL;
 885         }
 886
 887         /* Allocate netdev, including space for private structure */
 888         ndev = alloc_netdev(sizeof(struct brcmf_if), name, ether_setup);
 889         if (!ndev) {
 890                 brcmf_dbg(ERROR, "OOM - alloc_netdev\n");
 891                 return -ENOMEM;
 892         }
 893
 894         ifp = netdev_priv(ndev);
 895         ifp->ndev = ndev;
 896         ifp->info = drvr_priv;
 897         drvr_priv->iflist[ifidx] = ifp;
 898         ifp->idx = ifidx;
 899         if (mac_addr != NULL)
 900                 memcpy(&ifp->mac_addr, mac_addr, ETH_ALEN);
 901
 902         if (brcmf_net_attach(&drvr_priv->pub, ifp->idx)) {
 903                 brcmf_dbg(ERROR, "brcmf_net_attach failed");
 904                 free_netdev(ifp->ndev);
 905                 drvr_priv->iflist[ifidx] = NULL;
 906                 return -EOPNOTSUPP;
 907         }
 908
 909         brcmf_dbg(TRACE, " ==== pid:%x, net_device for if:%s created ===\n",
 910                   current->pid, ifp->ndev->name);
 911
 912         return 0;
 913 }
 914
 915 void brcmf_del_if(struct brcmf_info *drvr_priv, int ifidx)
 916 {
 917         struct brcmf_if *ifp;
 918
 919         brcmf_dbg(TRACE, "idx %d\n", ifidx);
 920
 921         ifp = drvr_priv->iflist[ifidx];
 922         if (!ifp) {
 923                 brcmf_dbg(ERROR, "Null interface\n");
 924                 return;
 925         }
 926         if (ifp->ndev) {
 927                 if (ifidx == 0) {
 928                         if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
 929                                 rtnl_lock();
 930                                 brcmf_netdev_stop(ifp->ndev);
 931                                 rtnl_unlock();
 932                         }
 933                 } else {
 934                         netif_stop_queue(ifp->ndev);
 935                 }
 936
 937                 unregister_netdev(ifp->ndev);
 938                 drvr_priv->iflist[ifidx] = NULL;
 939                 if (ifidx == 0)
 940                         brcmf_cfg80211_detach(drvr_priv->pub.config);
 941                 free_netdev(ifp->ndev);
 942         }
 943 }
 944
 945 struct brcmf_pub *brcmf_attach(struct brcmf_sdio *bus, uint bus_hdrlen,
 946                                struct device *dev)
 947 {
 948         struct brcmf_info *drvr_priv = NULL;
 949
 950         brcmf_dbg(TRACE, "Enter\n");
 951
 952         /* Allocate primary brcmf_info */
 953         drvr_priv = kzalloc(sizeof(struct brcmf_info), GFP_ATOMIC);
 954         if (!drvr_priv)
 955                 goto fail;
 956
 957         mutex_init(&drvr_priv->proto_block);
 958
 959         /* Link to info module */
 960         drvr_priv->pub.info = drvr_priv;
 961
 962         /* Link to bus module */
 963         drvr_priv->pub.bus = bus;
 964         drvr_priv->pub.hdrlen = bus_hdrlen;
 965         drvr_priv->pub.bus_if = dev_get_drvdata(dev);
 966         drvr_priv->pub.dev = dev;
 967
 968         /* Attach and link in the protocol */
 969         if (brcmf_proto_attach(&drvr_priv->pub) != 0) {
 970                 brcmf_dbg(ERROR, "brcmf_prot_attach failed\n");
 971                 goto fail;
 972         }
 973
 974         INIT_WORK(&drvr_priv->setmacaddr_work, _brcmf_set_mac_address);
 975         INIT_WORK(&drvr_priv->multicast_work, _brcmf_set_multicast_list);
 976
 977         return &drvr_priv->pub;
 978
 979 fail:
 980         if (drvr_priv)
 981                 brcmf_detach(&drvr_priv->pub);
 982
 983         return NULL;
 984 }
 985
 986 int brcmf_bus_start(struct brcmf_pub *drvr)
 987 {
 988         int ret = -1;
 989         struct brcmf_info *drvr_priv = drvr->info;
 990         /* Room for "event_msgs" + '\0' + bitvec */
 991         char iovbuf[BRCMF_EVENTING_MASK_LEN + 12];
 992
 993         brcmf_dbg(TRACE, "\n");
 994
 995         /* Bring up the bus */
 996         ret = brcmf_sdbrcm_bus_init(drvr_priv->pub.dev);
 997         if (ret != 0) {
 998                 brcmf_dbg(ERROR, "brcmf_sdbrcm_bus_init failed %d\n", ret);
 999                 return ret;
1000         }
1001
1002         /* If bus is not ready, can't come up */
1003         if (drvr_priv->pub.bus_if->state != BRCMF_BUS_DATA) {
1004                 brcmf_dbg(ERROR, "failed bus is not ready\n");
1005                 return -ENODEV;
1006         }
1007
1008         brcmf_c_mkiovar("event_msgs", drvr->eventmask, BRCMF_EVENTING_MASK_LEN,
1009                       iovbuf, sizeof(iovbuf));
1010         brcmf_proto_cdc_query_dcmd(drvr, 0, BRCMF_C_GET_VAR, iovbuf,
1011                                     sizeof(iovbuf));
1012         memcpy(drvr->eventmask, iovbuf, BRCMF_EVENTING_MASK_LEN);
1013
1014         setbit(drvr->eventmask, BRCMF_E_SET_SSID);
1015         setbit(drvr->eventmask, BRCMF_E_PRUNE);
1016         setbit(drvr->eventmask, BRCMF_E_AUTH);
1017         setbit(drvr->eventmask, BRCMF_E_REASSOC);
1018         setbit(drvr->eventmask, BRCMF_E_REASSOC_IND);
1019         setbit(drvr->eventmask, BRCMF_E_DEAUTH_IND);
1020         setbit(drvr->eventmask, BRCMF_E_DISASSOC_IND);
1021         setbit(drvr->eventmask, BRCMF_E_DISASSOC);
1022         setbit(drvr->eventmask, BRCMF_E_JOIN);
1023         setbit(drvr->eventmask, BRCMF_E_ASSOC_IND);
1024         setbit(drvr->eventmask, BRCMF_E_PSK_SUP);
1025         setbit(drvr->eventmask, BRCMF_E_LINK);
1026         setbit(drvr->eventmask, BRCMF_E_NDIS_LINK);
1027         setbit(drvr->eventmask, BRCMF_E_MIC_ERROR);
1028         setbit(drvr->eventmask, BRCMF_E_PMKID_CACHE);
1029         setbit(drvr->eventmask, BRCMF_E_TXFAIL);
1030         setbit(drvr->eventmask, BRCMF_E_JOIN_START);
1031         setbit(drvr->eventmask, BRCMF_E_SCAN_COMPLETE);
1032
1033 /* enable dongle roaming event */
1034
1035         drvr->pktfilter_count = 1;
1036         /* Setup filter to allow only unicast */
1037         drvr->pktfilter[0] = "100 0 0 0 0x01 0x00";
1038
1039         /* Bus is ready, do any protocol initialization */
1040         ret = brcmf_proto_init(&drvr_priv->pub);
1041         if (ret < 0)
1042                 return ret;
1043
1044         return 0;
1045 }
1046
1047 int brcmf_net_attach(struct brcmf_pub *drvr, int ifidx)
1048 {
1049         struct brcmf_info *drvr_priv = drvr->info;
1050         struct net_device *ndev;
1051         u8 temp_addr[ETH_ALEN] = {
1052                 0x00, 0x90, 0x4c, 0x11, 0x22, 0x33};
1053
1054         brcmf_dbg(TRACE, "ifidx %d\n", ifidx);
1055
1056         ndev = drvr_priv->iflist[ifidx]->ndev;
1057         ndev->netdev_ops = &brcmf_netdev_ops_pri;
1058
1059         /*
1060          * We have to use the primary MAC for virtual interfaces
1061          */
1062         if (ifidx != 0) {
1063                 /* for virtual interfaces use the primary MAC  */
1064                 memcpy(temp_addr, drvr_priv->pub.mac, ETH_ALEN);
1065
1066         }
1067
1068         if (ifidx == 1) {
1069                 brcmf_dbg(TRACE, "ACCESS POINT MAC:\n");
1070                 /*  ACCESSPOINT INTERFACE CASE */
1071                 temp_addr[0] |= 0X02;   /* set bit 2 ,
1072                          - Locally Administered address  */
1073
1074         }
1075         ndev->hard_header_len = ETH_HLEN + drvr_priv->pub.hdrlen;
1076         ndev->ethtool_ops = &brcmf_ethtool_ops;
1077
1078         drvr_priv->pub.rxsz = ndev->mtu + ndev->hard_header_len +
1079                               drvr_priv->pub.hdrlen;
1080
1081         memcpy(ndev->dev_addr, temp_addr, ETH_ALEN);
1082
1083         /* attach to cfg80211 for primary interface */
1084         if (!ifidx) {
1085                 drvr->config =
1086                         brcmf_cfg80211_attach(ndev,
1087                                               brcmf_bus_get_device(drvr->bus),
1088                                               drvr);
1089                 if (drvr->config == NULL) {
1090                         brcmf_dbg(ERROR, "wl_cfg80211_attach failed\n");
1091                         goto fail;
1092                 }
1093         }
1094
1095         if (register_netdev(ndev) != 0) {
1096                 brcmf_dbg(ERROR, "couldn't register the net device\n");
1097                 goto fail;
1098         }
1099
1100         brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
1101
1102         return 0;
1103
1104 fail:
1105         ndev->netdev_ops = NULL;
1106         return -EBADE;
1107 }
1108
1109 static void brcmf_bus_detach(struct brcmf_pub *drvr)
1110 {
1111         struct brcmf_info *drvr_priv;
1112
1113         brcmf_dbg(TRACE, "Enter\n");
1114
1115         if (drvr) {
1116                 drvr_priv = drvr->info;
1117                 if (drvr_priv) {
1118                         /* Stop the protocol module */
1119                         brcmf_proto_stop(&drvr_priv->pub);
1120
1121                         /* Stop the bus module */
1122                         brcmf_sdbrcm_bus_stop(drvr_priv->pub.bus);
1123                 }
1124         }
1125 }
1126
1127 void brcmf_detach(struct brcmf_pub *drvr)
1128 {
1129         struct brcmf_info *drvr_priv;
1130
1131         brcmf_dbg(TRACE, "Enter\n");
1132
1133         if (drvr) {
1134                 drvr_priv = drvr->info;
1135                 if (drvr_priv) {
1136                         int i;
1137
1138                         /* make sure primary interface removed last */
1139                         for (i = BRCMF_MAX_IFS-1; i > -1; i--)
1140                                 if (drvr_priv->iflist[i])
1141                                         brcmf_del_if(drvr_priv, i);
1142
1143                         cancel_work_sync(&drvr_priv->setmacaddr_work);
1144                         cancel_work_sync(&drvr_priv->multicast_work);
1145
1146                         brcmf_bus_detach(drvr);
1147
1148                         if (drvr->prot)
1149                                 brcmf_proto_detach(drvr);
1150
1151                         kfree(drvr_priv);
1152                 }
1153         }
1154 }
1155
1156 int brcmf_os_proto_block(struct brcmf_pub *drvr)
1157 {
1158         struct brcmf_info *drvr_priv = drvr->info;
1159
1160         if (drvr_priv) {
1161                 mutex_lock(&drvr_priv->proto_block);
1162                 return 1;
1163         }
1164         return 0;
1165 }
1166
1167 int brcmf_os_proto_unblock(struct brcmf_pub *drvr)
1168 {
1169         struct brcmf_info *drvr_priv = drvr->info;
1170
1171         if (drvr_priv) {
1172                 mutex_unlock(&drvr_priv->proto_block);
1173                 return 1;
1174         }
1175
1176         return 0;
1177 }
1178
1179 static int brcmf_get_pend_8021x_cnt(struct brcmf_info *drvr_priv)
1180 {
1181         return atomic_read(&drvr_priv->pend_8021x_cnt);
1182 }
1183
1184 #define MAX_WAIT_FOR_8021X_TX   10
1185
1186 int brcmf_netdev_wait_pend8021x(struct net_device *ndev)
1187 {
1188         struct brcmf_if *ifp = netdev_priv(ndev);
1189         struct brcmf_info *drvr_priv = ifp->info;
1190         int timeout = 10 * HZ / 1000;
1191         int ntimes = MAX_WAIT_FOR_8021X_TX;
1192         int pend = brcmf_get_pend_8021x_cnt(drvr_priv);
1193
1194         while (ntimes && pend) {
1195                 if (pend) {
1196                         set_current_state(TASK_INTERRUPTIBLE);
1197                         schedule_timeout(timeout);
1198                         set_current_state(TASK_RUNNING);
1199                         ntimes--;
1200                 }
1201                 pend = brcmf_get_pend_8021x_cnt(drvr_priv);
1202         }
1203         return pend;
1204 }
1205
1206 #ifdef BCMDBG
1207 int brcmf_write_to_file(struct brcmf_pub *drvr, const u8 *buf, int size)
1208 {
1209         int ret = 0;
1210         struct file *fp;
1211         mm_segment_t old_fs;
1212         loff_t pos = 0;
1213
1214         /* change to KERNEL_DS address limit */
1215         old_fs = get_fs();
1216         set_fs(KERNEL_DS);
1217
1218         /* open file to write */
1219         fp = filp_open("/tmp/mem_dump", O_WRONLY | O_CREAT, 0640);
1220         if (!fp) {
1221                 brcmf_dbg(ERROR, "open file error\n");
1222                 ret = -1;
1223                 goto exit;
1224         }
1225
1226         /* Write buf to file */
1227         fp->f_op->write(fp, (char __user *)buf, size, &pos);
1228
1229 exit:
1230         /* free buf before return */
1231         kfree(buf);
1232         /* close file before return */
1233         if (fp)
1234                 filp_close(fp, current->files);
1235         /* restore previous address limit */
1236         set_fs(old_fs);
1237
1238         return ret;
1239 }
1240 #endif                          /* BCMDBG */