linux/drivers/net/wireless/intersil/orinoco/main.c
<<
>>
Prefs
   1/* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c)
   2 *
   3 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
   4 * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
   5 *
   6 * Current maintainers (as of 29 September 2003) are:
   7 *      Pavel Roskin <proski AT gnu.org>
   8 * and  David Gibson <hermes AT gibson.dropbear.id.au>
   9 *
  10 * (C) Copyright David Gibson, IBM Corporation 2001-2003.
  11 * Copyright (C) 2000 David Gibson, Linuxcare Australia.
  12 *      With some help from :
  13 * Copyright (C) 2001 Jean Tourrilhes, HP Labs
  14 * Copyright (C) 2001 Benjamin Herrenschmidt
  15 *
  16 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
  17 *
  18 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
  19 * AT fasta.fh-dortmund.de>
  20 *      http://www.stud.fh-dortmund.de/~andy/wvlan/
  21 *
  22 * The contents of this file are subject to the Mozilla Public License
  23 * Version 1.1 (the "License"); you may not use this file except in
  24 * compliance with the License. You may obtain a copy of the License
  25 * at http://www.mozilla.org/MPL/
  26 *
  27 * Software distributed under the License is distributed on an "AS IS"
  28 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  29 * the License for the specific language governing rights and
  30 * limitations under the License.
  31 *
  32 * The initial developer of the original code is David A. Hinds
  33 * <dahinds AT users.sourceforge.net>.  Portions created by David
  34 * A. Hinds are Copyright (C) 1999 David A. Hinds.  All Rights
  35 * Reserved.
  36 *
  37 * Alternatively, the contents of this file may be used under the
  38 * terms of the GNU General Public License version 2 (the "GPL"), in
  39 * which case the provisions of the GPL are applicable instead of the
  40 * above.  If you wish to allow the use of your version of this file
  41 * only under the terms of the GPL and not to allow others to use your
  42 * version of this file under the MPL, indicate your decision by
  43 * deleting the provisions above and replace them with the notice and
  44 * other provisions required by the GPL.  If you do not delete the
  45 * provisions above, a recipient may use your version of this file
  46 * under either the MPL or the GPL.  */
  47
  48/*
  49 * TODO
  50 *      o Handle de-encapsulation within network layer, provide 802.11
  51 *        headers (patch from Thomas 'Dent' Mirlacher)
  52 *      o Fix possible races in SPY handling.
  53 *      o Disconnect wireless extensions from fundamental configuration.
  54 *      o (maybe) Software WEP support (patch from Stano Meduna).
  55 *      o (maybe) Use multiple Tx buffers - driver handling queue
  56 *        rather than firmware.
  57 */
  58
  59/* Locking and synchronization:
  60 *
  61 * The basic principle is that everything is serialized through a
  62 * single spinlock, priv->lock.  The lock is used in user, bh and irq
  63 * context, so when taken outside hardirq context it should always be
  64 * taken with interrupts disabled.  The lock protects both the
  65 * hardware and the struct orinoco_private.
  66 *
  67 * Another flag, priv->hw_unavailable indicates that the hardware is
  68 * unavailable for an extended period of time (e.g. suspended, or in
  69 * the middle of a hard reset).  This flag is protected by the
  70 * spinlock.  All code which touches the hardware should check the
  71 * flag after taking the lock, and if it is set, give up on whatever
  72 * they are doing and drop the lock again.  The orinoco_lock()
  73 * function handles this (it unlocks and returns -EBUSY if
  74 * hw_unavailable is non-zero).
  75 */
  76
  77#define DRIVER_NAME "orinoco"
  78
  79#include <linux/module.h>
  80#include <linux/kernel.h>
  81#include <linux/slab.h>
  82#include <linux/init.h>
  83#include <linux/delay.h>
  84#include <linux/device.h>
  85#include <linux/netdevice.h>
  86#include <linux/etherdevice.h>
  87#include <linux/suspend.h>
  88#include <linux/if_arp.h>
  89#include <linux/wireless.h>
  90#include <linux/ieee80211.h>
  91#include <net/iw_handler.h>
  92#include <net/cfg80211.h>
  93
  94#include "hermes_rid.h"
  95#include "hermes_dld.h"
  96#include "hw.h"
  97#include "scan.h"
  98#include "mic.h"
  99#include "fw.h"
 100#include "wext.h"
 101#include "cfg.h"
 102#include "main.h"
 103
 104#include "orinoco.h"
 105
 106/********************************************************************/
 107/* Module information                                               */
 108/********************************************************************/
 109
 110MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
 111              "David Gibson <hermes@gibson.dropbear.id.au>");
 112MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
 113                   "and similar wireless cards");
 114MODULE_LICENSE("Dual MPL/GPL");
 115
 116/* Level of debugging. Used in the macros in orinoco.h */
 117#ifdef ORINOCO_DEBUG
 118int orinoco_debug = ORINOCO_DEBUG;
 119EXPORT_SYMBOL(orinoco_debug);
 120module_param(orinoco_debug, int, 0644);
 121MODULE_PARM_DESC(orinoco_debug, "Debug level");
 122#endif
 123
 124static bool suppress_linkstatus; /* = 0 */
 125module_param(suppress_linkstatus, bool, 0644);
 126MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
 127
 128static int ignore_disconnect; /* = 0 */
 129module_param(ignore_disconnect, int, 0644);
 130MODULE_PARM_DESC(ignore_disconnect,
 131                 "Don't report lost link to the network layer");
 132
 133int force_monitor; /* = 0 */
 134module_param(force_monitor, int, 0644);
 135MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");
 136
 137/********************************************************************/
 138/* Internal constants                                               */
 139/********************************************************************/
 140
 141/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
 142static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
 143#define ENCAPS_OVERHEAD         (sizeof(encaps_hdr) + 2)
 144
 145#define ORINOCO_MIN_MTU         256
 146#define ORINOCO_MAX_MTU         (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD)
 147
 148#define MAX_IRQLOOPS_PER_IRQ    10
 149#define MAX_IRQLOOPS_PER_JIFFY  (20000 / HZ)    /* Based on a guestimate of
 150                                                 * how many events the
 151                                                 * device could
 152                                                 * legitimately generate */
 153
 154#define DUMMY_FID               0xFFFF
 155
 156/*#define MAX_MULTICAST(priv)   (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
 157  HERMES_MAX_MULTICAST : 0)*/
 158#define MAX_MULTICAST(priv)     (HERMES_MAX_MULTICAST)
 159
 160#define ORINOCO_INTEN           (HERMES_EV_RX | HERMES_EV_ALLOC \
 161                                 | HERMES_EV_TX | HERMES_EV_TXEXC \
 162                                 | HERMES_EV_WTERR | HERMES_EV_INFO \
 163                                 | HERMES_EV_INFDROP)
 164
 165/********************************************************************/
 166/* Data types                                                       */
 167/********************************************************************/
 168
 169/* Beginning of the Tx descriptor, used in TxExc handling */
 170struct hermes_txexc_data {
 171        struct hermes_tx_descriptor desc;
 172        __le16 frame_ctl;
 173        __le16 duration_id;
 174        u8 addr1[ETH_ALEN];
 175} __packed;
 176
 177/* Rx frame header except compatibility 802.3 header */
 178struct hermes_rx_descriptor {
 179        /* Control */
 180        __le16 status;
 181        __le32 time;
 182        u8 silence;
 183        u8 signal;
 184        u8 rate;
 185        u8 rxflow;
 186        __le32 reserved;
 187
 188        /* 802.11 header */
 189        __le16 frame_ctl;
 190        __le16 duration_id;
 191        u8 addr1[ETH_ALEN];
 192        u8 addr2[ETH_ALEN];
 193        u8 addr3[ETH_ALEN];
 194        __le16 seq_ctl;
 195        u8 addr4[ETH_ALEN];
 196
 197        /* Data length */
 198        __le16 data_len;
 199} __packed;
 200
 201struct orinoco_rx_data {
 202        struct hermes_rx_descriptor *desc;
 203        struct sk_buff *skb;
 204        struct list_head list;
 205};
 206
 207struct orinoco_scan_data {
 208        void *buf;
 209        size_t len;
 210        int type;
 211        struct list_head list;
 212};
 213
 214/********************************************************************/
 215/* Function prototypes                                              */
 216/********************************************************************/
 217
 218static int __orinoco_set_multicast_list(struct net_device *dev);
 219static int __orinoco_up(struct orinoco_private *priv);
 220static int __orinoco_down(struct orinoco_private *priv);
 221static int __orinoco_commit(struct orinoco_private *priv);
 222
 223/********************************************************************/
 224/* Internal helper functions                                        */
 225/********************************************************************/
 226
 227void set_port_type(struct orinoco_private *priv)
 228{
 229        switch (priv->iw_mode) {
 230        case NL80211_IFTYPE_STATION:
 231                priv->port_type = 1;
 232                priv->createibss = 0;
 233                break;
 234        case NL80211_IFTYPE_ADHOC:
 235                if (priv->prefer_port3) {
 236                        priv->port_type = 3;
 237                        priv->createibss = 0;
 238                } else {
 239                        priv->port_type = priv->ibss_port;
 240                        priv->createibss = 1;
 241                }
 242                break;
 243        case NL80211_IFTYPE_MONITOR:
 244                priv->port_type = 3;
 245                priv->createibss = 0;
 246                break;
 247        default:
 248                printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
 249                       priv->ndev->name);
 250        }
 251}
 252
 253/********************************************************************/
 254/* Device methods                                                   */
 255/********************************************************************/
 256
 257int orinoco_open(struct net_device *dev)
 258{
 259        struct orinoco_private *priv = ndev_priv(dev);
 260        unsigned long flags;
 261        int err;
 262
 263        if (orinoco_lock(priv, &flags) != 0)
 264                return -EBUSY;
 265
 266        err = __orinoco_up(priv);
 267
 268        if (!err)
 269                priv->open = 1;
 270
 271        orinoco_unlock(priv, &flags);
 272
 273        return err;
 274}
 275EXPORT_SYMBOL(orinoco_open);
 276
 277int orinoco_stop(struct net_device *dev)
 278{
 279        struct orinoco_private *priv = ndev_priv(dev);
 280        int err = 0;
 281
 282        /* We mustn't use orinoco_lock() here, because we need to be
 283           able to close the interface even if hw_unavailable is set
 284           (e.g. as we're released after a PC Card removal) */
 285        orinoco_lock_irq(priv);
 286
 287        priv->open = 0;
 288
 289        err = __orinoco_down(priv);
 290
 291        orinoco_unlock_irq(priv);
 292
 293        return err;
 294}
 295EXPORT_SYMBOL(orinoco_stop);
 296
 297void orinoco_set_multicast_list(struct net_device *dev)
 298{
 299        struct orinoco_private *priv = ndev_priv(dev);
 300        unsigned long flags;
 301
 302        if (orinoco_lock(priv, &flags) != 0) {
 303                printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
 304                       "called when hw_unavailable\n", dev->name);
 305                return;
 306        }
 307
 308        __orinoco_set_multicast_list(dev);
 309        orinoco_unlock(priv, &flags);
 310}
 311EXPORT_SYMBOL(orinoco_set_multicast_list);
 312
 313int orinoco_change_mtu(struct net_device *dev, int new_mtu)
 314{
 315        struct orinoco_private *priv = ndev_priv(dev);
 316
 317        /* MTU + encapsulation + header length */
 318        if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
 319             (priv->nicbuf_size - ETH_HLEN))
 320                return -EINVAL;
 321
 322        dev->mtu = new_mtu;
 323
 324        return 0;
 325}
 326EXPORT_SYMBOL(orinoco_change_mtu);
 327
 328/********************************************************************/
 329/* Tx path                                                          */
 330/********************************************************************/
 331
 332/* Add encapsulation and MIC to the existing SKB.
 333 * The main xmit routine will then send the whole lot to the card.
 334 * Need 8 bytes headroom
 335 * Need 8 bytes tailroom
 336 *
 337 *                          With encapsulated ethernet II frame
 338 *                          --------
 339 *                          803.3 header (14 bytes)
 340 *                           dst[6]
 341 * --------                  src[6]
 342 * 803.3 header (14 bytes)   len[2]
 343 *  dst[6]                  803.2 header (8 bytes)
 344 *  src[6]                   encaps[6]
 345 *  len[2] <- leave alone -> len[2]
 346 * --------                 -------- <-- 0
 347 * Payload                  Payload
 348 * ...                      ...
 349 *
 350 * --------                 --------
 351 *                          MIC (8 bytes)
 352 *                          --------
 353 *
 354 * returns 0 on success, -ENOMEM on error.
 355 */
 356int orinoco_process_xmit_skb(struct sk_buff *skb,
 357                             struct net_device *dev,
 358                             struct orinoco_private *priv,
 359                             int *tx_control,
 360                             u8 *mic_buf)
 361{
 362        struct orinoco_tkip_key *key;
 363        struct ethhdr *eh;
 364        int do_mic;
 365
 366        key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key;
 367
 368        do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) &&
 369                  (key != NULL));
 370
 371        if (do_mic)
 372                *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
 373                        HERMES_TXCTRL_MIC;
 374
 375        eh = (struct ethhdr *)skb->data;
 376
 377        /* Encapsulate Ethernet-II frames */
 378        if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
 379                struct header_struct {
 380                        struct ethhdr eth;      /* 802.3 header */
 381                        u8 encap[6];            /* 802.2 header */
 382                } __packed hdr;
 383                int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN);
 384
 385                if (skb_headroom(skb) < ENCAPS_OVERHEAD) {
 386                        if (net_ratelimit())
 387                                printk(KERN_ERR
 388                                       "%s: Not enough headroom for 802.2 headers %d\n",
 389                                       dev->name, skb_headroom(skb));
 390                        return -ENOMEM;
 391                }
 392
 393                /* Fill in new header */
 394                memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
 395                hdr.eth.h_proto = htons(len);
 396                memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
 397
 398                /* Make room for the new header, and copy it in */
 399                eh = skb_push(skb, ENCAPS_OVERHEAD);
 400                memcpy(eh, &hdr, sizeof(hdr));
 401        }
 402
 403        /* Calculate Michael MIC */
 404        if (do_mic) {
 405                size_t len = skb->len - ETH_HLEN;
 406                u8 *mic = &mic_buf[0];
 407
 408                /* Have to write to an even address, so copy the spare
 409                 * byte across */
 410                if (skb->len % 2) {
 411                        *mic = skb->data[skb->len - 1];
 412                        mic++;
 413                }
 414
 415                orinoco_mic(priv->tx_tfm_mic, key->tx_mic,
 416                            eh->h_dest, eh->h_source, 0 /* priority */,
 417                            skb->data + ETH_HLEN,
 418                            len, mic);
 419        }
 420
 421        return 0;
 422}
 423EXPORT_SYMBOL(orinoco_process_xmit_skb);
 424
 425static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
 426{
 427        struct orinoco_private *priv = ndev_priv(dev);
 428        struct net_device_stats *stats = &dev->stats;
 429        struct hermes *hw = &priv->hw;
 430        int err = 0;
 431        u16 txfid = priv->txfid;
 432        int tx_control;
 433        unsigned long flags;
 434        u8 mic_buf[MICHAEL_MIC_LEN + 1];
 435
 436        if (!netif_running(dev)) {
 437                printk(KERN_ERR "%s: Tx on stopped device!\n",
 438                       dev->name);
 439                return NETDEV_TX_BUSY;
 440        }
 441
 442        if (netif_queue_stopped(dev)) {
 443                printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
 444                       dev->name);
 445                return NETDEV_TX_BUSY;
 446        }
 447
 448        if (orinoco_lock(priv, &flags) != 0) {
 449                printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
 450                       dev->name);
 451                return NETDEV_TX_BUSY;
 452        }
 453
 454        if (!netif_carrier_ok(dev) ||
 455            (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
 456                /* Oops, the firmware hasn't established a connection,
 457                   silently drop the packet (this seems to be the
 458                   safest approach). */
 459                goto drop;
 460        }
 461
 462        /* Check packet length */
 463        if (skb->len < ETH_HLEN)
 464                goto drop;
 465
 466        tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;
 467
 468        err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
 469                                       &mic_buf[0]);
 470        if (err)
 471                goto drop;
 472
 473        if (priv->has_alt_txcntl) {
 474                /* WPA enabled firmwares have tx_cntl at the end of
 475                 * the 802.11 header.  So write zeroed descriptor and
 476                 * 802.11 header at the same time
 477                 */
 478                char desc[HERMES_802_3_OFFSET];
 479                __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];
 480
 481                memset(&desc, 0, sizeof(desc));
 482
 483                *txcntl = cpu_to_le16(tx_control);
 484                err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
 485                                          txfid, 0);
 486                if (err) {
 487                        if (net_ratelimit())
 488                                printk(KERN_ERR "%s: Error %d writing Tx "
 489                                       "descriptor to BAP\n", dev->name, err);
 490                        goto busy;
 491                }
 492        } else {
 493                struct hermes_tx_descriptor desc;
 494
 495                memset(&desc, 0, sizeof(desc));
 496
 497                desc.tx_control = cpu_to_le16(tx_control);
 498                err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
 499                                          txfid, 0);
 500                if (err) {
 501                        if (net_ratelimit())
 502                                printk(KERN_ERR "%s: Error %d writing Tx "
 503                                       "descriptor to BAP\n", dev->name, err);
 504                        goto busy;
 505                }
 506
 507                /* Clear the 802.11 header and data length fields - some
 508                 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
 509                 * if this isn't done. */
 510                hermes_clear_words(hw, HERMES_DATA0,
 511                                   HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
 512        }
 513
 514        err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len,
 515                                  txfid, HERMES_802_3_OFFSET);
 516        if (err) {
 517                printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
 518                       dev->name, err);
 519                goto busy;
 520        }
 521
 522        if (tx_control & HERMES_TXCTRL_MIC) {
 523                size_t offset = HERMES_802_3_OFFSET + skb->len;
 524                size_t len = MICHAEL_MIC_LEN;
 525
 526                if (offset % 2) {
 527                        offset--;
 528                        len++;
 529                }
 530                err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
 531                                          txfid, offset);
 532                if (err) {
 533                        printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
 534                               dev->name, err);
 535                        goto busy;
 536                }
 537        }
 538
 539        /* Finally, we actually initiate the send */
 540        netif_stop_queue(dev);
 541
 542        err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
 543                                txfid, NULL);
 544        if (err) {
 545                netif_start_queue(dev);
 546                if (net_ratelimit())
 547                        printk(KERN_ERR "%s: Error %d transmitting packet\n",
 548                                dev->name, err);
 549                goto busy;
 550        }
 551
 552        stats->tx_bytes += HERMES_802_3_OFFSET + skb->len;
 553        goto ok;
 554
 555 drop:
 556        stats->tx_errors++;
 557        stats->tx_dropped++;
 558
 559 ok:
 560        orinoco_unlock(priv, &flags);
 561        dev_kfree_skb(skb);
 562        return NETDEV_TX_OK;
 563
 564 busy:
 565        if (err == -EIO)
 566                schedule_work(&priv->reset_work);
 567        orinoco_unlock(priv, &flags);
 568        return NETDEV_TX_BUSY;
 569}
 570
 571static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw)
 572{
 573        struct orinoco_private *priv = ndev_priv(dev);
 574        u16 fid = hermes_read_regn(hw, ALLOCFID);
 575
 576        if (fid != priv->txfid) {
 577                if (fid != DUMMY_FID)
 578                        printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
 579                               dev->name, fid);
 580                return;
 581        }
 582
 583        hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
 584}
 585
 586static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw)
 587{
 588        dev->stats.tx_packets++;
 589
 590        netif_wake_queue(dev);
 591
 592        hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
 593}
 594
 595static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw)
 596{
 597        struct net_device_stats *stats = &dev->stats;
 598        u16 fid = hermes_read_regn(hw, TXCOMPLFID);
 599        u16 status;
 600        struct hermes_txexc_data hdr;
 601        int err = 0;
 602
 603        if (fid == DUMMY_FID)
 604                return; /* Nothing's really happened */
 605
 606        /* Read part of the frame header - we need status and addr1 */
 607        err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr,
 608                                 sizeof(struct hermes_txexc_data),
 609                                 fid, 0);
 610
 611        hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
 612        stats->tx_errors++;
 613
 614        if (err) {
 615                printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
 616                       "(FID=%04X error %d)\n",
 617                       dev->name, fid, err);
 618                return;
 619        }
 620
 621        DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
 622              err, fid);
 623
 624        /* We produce a TXDROP event only for retry or lifetime
 625         * exceeded, because that's the only status that really mean
 626         * that this particular node went away.
 627         * Other errors means that *we* screwed up. - Jean II */
 628        status = le16_to_cpu(hdr.desc.status);
 629        if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
 630                union iwreq_data        wrqu;
 631
 632                /* Copy 802.11 dest address.
 633                 * We use the 802.11 header because the frame may
 634                 * not be 802.3 or may be mangled...
 635                 * In Ad-Hoc mode, it will be the node address.
 636                 * In managed mode, it will be most likely the AP addr
 637                 * User space will figure out how to convert it to
 638                 * whatever it needs (IP address or else).
 639                 * - Jean II */
 640                memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
 641                wrqu.addr.sa_family = ARPHRD_ETHER;
 642
 643                /* Send event to user space */
 644                wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
 645        }
 646
 647        netif_wake_queue(dev);
 648}
 649
 650void orinoco_tx_timeout(struct net_device *dev, unsigned int txqueue)
 651{
 652        struct orinoco_private *priv = ndev_priv(dev);
 653        struct net_device_stats *stats = &dev->stats;
 654        struct hermes *hw = &priv->hw;
 655
 656        printk(KERN_WARNING "%s: Tx timeout! "
 657               "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
 658               dev->name, hermes_read_regn(hw, ALLOCFID),
 659               hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));
 660
 661        stats->tx_errors++;
 662
 663        schedule_work(&priv->reset_work);
 664}
 665EXPORT_SYMBOL(orinoco_tx_timeout);
 666
 667/********************************************************************/
 668/* Rx path (data frames)                                            */
 669/********************************************************************/
 670
 671/* Does the frame have a SNAP header indicating it should be
 672 * de-encapsulated to Ethernet-II? */
 673static inline int is_ethersnap(void *_hdr)
 674{
 675        u8 *hdr = _hdr;
 676
 677        /* We de-encapsulate all packets which, a) have SNAP headers
 678         * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
 679         * and where b) the OUI of the SNAP header is 00:00:00 or
 680         * 00:00:f8 - we need both because different APs appear to use
 681         * different OUIs for some reason */
 682        return (memcmp(hdr, &encaps_hdr, 5) == 0)
 683                && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
 684}
 685
 686static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
 687                                      int level, int noise)
 688{
 689        struct iw_quality wstats;
 690        wstats.level = level - 0x95;
 691        wstats.noise = noise - 0x95;
 692        wstats.qual = (level > noise) ? (level - noise) : 0;
 693        wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
 694        /* Update spy records */
 695        wireless_spy_update(dev, mac, &wstats);
 696}
 697
 698static void orinoco_stat_gather(struct net_device *dev,
 699                                struct sk_buff *skb,
 700                                struct hermes_rx_descriptor *desc)
 701{
 702        struct orinoco_private *priv = ndev_priv(dev);
 703
 704        /* Using spy support with lots of Rx packets, like in an
 705         * infrastructure (AP), will really slow down everything, because
 706         * the MAC address must be compared to each entry of the spy list.
 707         * If the user really asks for it (set some address in the
 708         * spy list), we do it, but he will pay the price.
 709         * Note that to get here, you need both WIRELESS_SPY
 710         * compiled in AND some addresses in the list !!!
 711         */
 712        /* Note : gcc will optimise the whole section away if
 713         * WIRELESS_SPY is not defined... - Jean II */
 714        if (SPY_NUMBER(priv)) {
 715                orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
 716                                   desc->signal, desc->silence);
 717        }
 718}
 719
 720/*
 721 * orinoco_rx_monitor - handle received monitor frames.
 722 *
 723 * Arguments:
 724 *      dev             network device
 725 *      rxfid           received FID
 726 *      desc            rx descriptor of the frame
 727 *
 728 * Call context: interrupt
 729 */
 730static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
 731                               struct hermes_rx_descriptor *desc)
 732{
 733        u32 hdrlen = 30;        /* return full header by default */
 734        u32 datalen = 0;
 735        u16 fc;
 736        int err;
 737        int len;
 738        struct sk_buff *skb;
 739        struct orinoco_private *priv = ndev_priv(dev);
 740        struct net_device_stats *stats = &dev->stats;
 741        struct hermes *hw = &priv->hw;
 742
 743        len = le16_to_cpu(desc->data_len);
 744
 745        /* Determine the size of the header and the data */
 746        fc = le16_to_cpu(desc->frame_ctl);
 747        switch (fc & IEEE80211_FCTL_FTYPE) {
 748        case IEEE80211_FTYPE_DATA:
 749                if ((fc & IEEE80211_FCTL_TODS)
 750                    && (fc & IEEE80211_FCTL_FROMDS))
 751                        hdrlen = 30;
 752                else
 753                        hdrlen = 24;
 754                datalen = len;
 755                break;
 756        case IEEE80211_FTYPE_MGMT:
 757                hdrlen = 24;
 758                datalen = len;
 759                break;
 760        case IEEE80211_FTYPE_CTL:
 761                switch (fc & IEEE80211_FCTL_STYPE) {
 762                case IEEE80211_STYPE_PSPOLL:
 763                case IEEE80211_STYPE_RTS:
 764                case IEEE80211_STYPE_CFEND:
 765                case IEEE80211_STYPE_CFENDACK:
 766                        hdrlen = 16;
 767                        break;
 768                case IEEE80211_STYPE_CTS:
 769                case IEEE80211_STYPE_ACK:
 770                        hdrlen = 10;
 771                        break;
 772                }
 773                break;
 774        default:
 775                /* Unknown frame type */
 776                break;
 777        }
 778
 779        /* sanity check the length */
 780        if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
 781                printk(KERN_DEBUG "%s: oversized monitor frame, "
 782                       "data length = %d\n", dev->name, datalen);
 783                stats->rx_length_errors++;
 784                goto update_stats;
 785        }
 786
 787        skb = dev_alloc_skb(hdrlen + datalen);
 788        if (!skb) {
 789                printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
 790                       dev->name);
 791                goto update_stats;
 792        }
 793
 794        /* Copy the 802.11 header to the skb */
 795        skb_put_data(skb, &(desc->frame_ctl), hdrlen);
 796        skb_reset_mac_header(skb);
 797
 798        /* If any, copy the data from the card to the skb */
 799        if (datalen > 0) {
 800                err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
 801                                         ALIGN(datalen, 2), rxfid,
 802                                         HERMES_802_2_OFFSET);
 803                if (err) {
 804                        printk(KERN_ERR "%s: error %d reading monitor frame\n",
 805                               dev->name, err);
 806                        goto drop;
 807                }
 808        }
 809
 810        skb->dev = dev;
 811        skb->ip_summed = CHECKSUM_NONE;
 812        skb->pkt_type = PACKET_OTHERHOST;
 813        skb->protocol = cpu_to_be16(ETH_P_802_2);
 814
 815        stats->rx_packets++;
 816        stats->rx_bytes += skb->len;
 817
 818        netif_rx(skb);
 819        return;
 820
 821 drop:
 822        dev_kfree_skb_irq(skb);
 823 update_stats:
 824        stats->rx_errors++;
 825        stats->rx_dropped++;
 826}
 827
 828void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw)
 829{
 830        struct orinoco_private *priv = ndev_priv(dev);
 831        struct net_device_stats *stats = &dev->stats;
 832        struct iw_statistics *wstats = &priv->wstats;
 833        struct sk_buff *skb = NULL;
 834        u16 rxfid, status;
 835        int length;
 836        struct hermes_rx_descriptor *desc;
 837        struct orinoco_rx_data *rx_data;
 838        int err;
 839
 840        desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
 841        if (!desc)
 842                goto update_stats;
 843
 844        rxfid = hermes_read_regn(hw, RXFID);
 845
 846        err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
 847                                 rxfid, 0);
 848        if (err) {
 849                printk(KERN_ERR "%s: error %d reading Rx descriptor. "
 850                       "Frame dropped.\n", dev->name, err);
 851                goto update_stats;
 852        }
 853
 854        status = le16_to_cpu(desc->status);
 855
 856        if (status & HERMES_RXSTAT_BADCRC) {
 857                DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
 858                      dev->name);
 859                stats->rx_crc_errors++;
 860                goto update_stats;
 861        }
 862
 863        /* Handle frames in monitor mode */
 864        if (priv->iw_mode == NL80211_IFTYPE_MONITOR) {
 865                orinoco_rx_monitor(dev, rxfid, desc);
 866                goto out;
 867        }
 868
 869        if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
 870                DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
 871                      dev->name);
 872                wstats->discard.code++;
 873                goto update_stats;
 874        }
 875
 876        length = le16_to_cpu(desc->data_len);
 877
 878        /* Sanity checks */
 879        if (length < 3) { /* No for even an 802.2 LLC header */
 880                /* At least on Symbol firmware with PCF we get quite a
 881                   lot of these legitimately - Poll frames with no
 882                   data. */
 883                goto out;
 884        }
 885        if (length > IEEE80211_MAX_DATA_LEN) {
 886                printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
 887                       dev->name, length);
 888                stats->rx_length_errors++;
 889                goto update_stats;
 890        }
 891
 892        /* Payload size does not include Michael MIC. Increase payload
 893         * size to read it together with the data. */
 894        if (status & HERMES_RXSTAT_MIC)
 895                length += MICHAEL_MIC_LEN;
 896
 897        /* We need space for the packet data itself, plus an ethernet
 898           header, plus 2 bytes so we can align the IP header on a
 899           32bit boundary, plus 1 byte so we can read in odd length
 900           packets from the card, which has an IO granularity of 16
 901           bits */
 902        skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1);
 903        if (!skb) {
 904                printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
 905                       dev->name);
 906                goto update_stats;
 907        }
 908
 909        /* We'll prepend the header, so reserve space for it.  The worst
 910           case is no decapsulation, when 802.3 header is prepended and
 911           nothing is removed.  2 is for aligning the IP header.  */
 912        skb_reserve(skb, ETH_HLEN + 2);
 913
 914        err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length),
 915                                 ALIGN(length, 2), rxfid,
 916                                 HERMES_802_2_OFFSET);
 917        if (err) {
 918                printk(KERN_ERR "%s: error %d reading frame. "
 919                       "Frame dropped.\n", dev->name, err);
 920                goto drop;
 921        }
 922
 923        /* Add desc and skb to rx queue */
 924        rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
 925        if (!rx_data)
 926                goto drop;
 927
 928        rx_data->desc = desc;
 929        rx_data->skb = skb;
 930        list_add_tail(&rx_data->list, &priv->rx_list);
 931        tasklet_schedule(&priv->rx_tasklet);
 932
 933        return;
 934
 935drop:
 936        dev_kfree_skb_irq(skb);
 937update_stats:
 938        stats->rx_errors++;
 939        stats->rx_dropped++;
 940out:
 941        kfree(desc);
 942}
 943EXPORT_SYMBOL(__orinoco_ev_rx);
 944
 945static void orinoco_rx(struct net_device *dev,
 946                       struct hermes_rx_descriptor *desc,
 947                       struct sk_buff *skb)
 948{
 949        struct orinoco_private *priv = ndev_priv(dev);
 950        struct net_device_stats *stats = &dev->stats;
 951        u16 status, fc;
 952        int length;
 953        struct ethhdr *hdr;
 954
 955        status = le16_to_cpu(desc->status);
 956        length = le16_to_cpu(desc->data_len);
 957        fc = le16_to_cpu(desc->frame_ctl);
 958
 959        /* Calculate and check MIC */
 960        if (status & HERMES_RXSTAT_MIC) {
 961                struct orinoco_tkip_key *key;
 962                int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
 963                              HERMES_MIC_KEY_ID_SHIFT);
 964                u8 mic[MICHAEL_MIC_LEN];
 965                u8 *rxmic;
 966                u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
 967                        desc->addr3 : desc->addr2;
 968
 969                /* Extract Michael MIC from payload */
 970                rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;
 971
 972                skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
 973                length -= MICHAEL_MIC_LEN;
 974
 975                key = (struct orinoco_tkip_key *) priv->keys[key_id].key;
 976
 977                if (!key) {
 978                        printk(KERN_WARNING "%s: Received encrypted frame from "
 979                               "%pM using key %i, but key is not installed\n",
 980                               dev->name, src, key_id);
 981                        goto drop;
 982                }
 983
 984                orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src,
 985                            0, /* priority or QoS? */
 986                            skb->data, skb->len, &mic[0]);
 987
 988                if (memcmp(mic, rxmic,
 989                           MICHAEL_MIC_LEN)) {
 990                        union iwreq_data wrqu;
 991                        struct iw_michaelmicfailure wxmic;
 992
 993                        printk(KERN_WARNING "%s: "
 994                               "Invalid Michael MIC in data frame from %pM, "
 995                               "using key %i\n",
 996                               dev->name, src, key_id);
 997
 998                        /* TODO: update stats */
 999
1000                        /* Notify userspace */
1001                        memset(&wxmic, 0, sizeof(wxmic));
1002                        wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
1003                        wxmic.flags |= (desc->addr1[0] & 1) ?
1004                                IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
1005                        wxmic.src_addr.sa_family = ARPHRD_ETHER;
1006                        memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);
1007
1008                        (void) orinoco_hw_get_tkip_iv(priv, key_id,
1009                                                      &wxmic.tsc[0]);
1010
1011                        memset(&wrqu, 0, sizeof(wrqu));
1012                        wrqu.data.length = sizeof(wxmic);
1013                        wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
1014                                            (char *) &wxmic);
1015
1016                        goto drop;
1017                }
1018        }
1019
1020        /* Handle decapsulation
1021         * In most cases, the firmware tell us about SNAP frames.
1022         * For some reason, the SNAP frames sent by LinkSys APs
1023         * are not properly recognised by most firmwares.
1024         * So, check ourselves */
1025        if (length >= ENCAPS_OVERHEAD &&
1026            (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
1027             ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
1028             is_ethersnap(skb->data))) {
1029                /* These indicate a SNAP within 802.2 LLC within
1030                   802.11 frame which we'll need to de-encapsulate to
1031                   the original EthernetII frame. */
1032                hdr = skb_push(skb, ETH_HLEN - ENCAPS_OVERHEAD);
1033        } else {
1034                /* 802.3 frame - prepend 802.3 header as is */
1035                hdr = skb_push(skb, ETH_HLEN);
1036                hdr->h_proto = htons(length);
1037        }
1038        memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
1039        if (fc & IEEE80211_FCTL_FROMDS)
1040                memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
1041        else
1042                memcpy(hdr->h_source, desc->addr2, ETH_ALEN);
1043
1044        skb->protocol = eth_type_trans(skb, dev);
1045        skb->ip_summed = CHECKSUM_NONE;
1046        if (fc & IEEE80211_FCTL_TODS)
1047                skb->pkt_type = PACKET_OTHERHOST;
1048
1049        /* Process the wireless stats if needed */
1050        orinoco_stat_gather(dev, skb, desc);
1051
1052        /* Pass the packet to the networking stack */
1053        netif_rx(skb);
1054        stats->rx_packets++;
1055        stats->rx_bytes += length;
1056
1057        return;
1058
1059 drop:
1060        dev_kfree_skb(skb);
1061        stats->rx_errors++;
1062        stats->rx_dropped++;
1063}
1064
1065static void orinoco_rx_isr_tasklet(struct tasklet_struct *t)
1066{
1067        struct orinoco_private *priv = from_tasklet(priv, t, rx_tasklet);
1068        struct net_device *dev = priv->ndev;
1069        struct orinoco_rx_data *rx_data, *temp;
1070        struct hermes_rx_descriptor *desc;
1071        struct sk_buff *skb;
1072        unsigned long flags;
1073
1074        /* orinoco_rx requires the driver lock, and we also need to
1075         * protect priv->rx_list, so just hold the lock over the
1076         * lot.
1077         *
1078         * If orinoco_lock fails, we've unplugged the card. In this
1079         * case just abort. */
1080        if (orinoco_lock(priv, &flags) != 0)
1081                return;
1082
1083        /* extract desc and skb from queue */
1084        list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
1085                desc = rx_data->desc;
1086                skb = rx_data->skb;
1087                list_del(&rx_data->list);
1088                kfree(rx_data);
1089
1090                orinoco_rx(dev, desc, skb);
1091
1092                kfree(desc);
1093        }
1094
1095        orinoco_unlock(priv, &flags);
1096}
1097
1098/********************************************************************/
1099/* Rx path (info frames)                                            */
1100/********************************************************************/
1101
1102static void print_linkstatus(struct net_device *dev, u16 status)
1103{
1104        char *s;
1105
1106        if (suppress_linkstatus)
1107                return;
1108
1109        switch (status) {
1110        case HERMES_LINKSTATUS_NOT_CONNECTED:
1111                s = "Not Connected";
1112                break;
1113        case HERMES_LINKSTATUS_CONNECTED:
1114                s = "Connected";
1115                break;
1116        case HERMES_LINKSTATUS_DISCONNECTED:
1117                s = "Disconnected";
1118                break;
1119        case HERMES_LINKSTATUS_AP_CHANGE:
1120                s = "AP Changed";
1121                break;
1122        case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
1123                s = "AP Out of Range";
1124                break;
1125        case HERMES_LINKSTATUS_AP_IN_RANGE:
1126                s = "AP In Range";
1127                break;
1128        case HERMES_LINKSTATUS_ASSOC_FAILED:
1129                s = "Association Failed";
1130                break;
1131        default:
1132                s = "UNKNOWN";
1133        }
1134
1135        printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
1136               dev->name, s, status);
1137}
1138
1139/* Search scan results for requested BSSID, join it if found */
1140static void orinoco_join_ap(struct work_struct *work)
1141{
1142        struct orinoco_private *priv =
1143                container_of(work, struct orinoco_private, join_work);
1144        struct net_device *dev = priv->ndev;
1145        struct hermes *hw = &priv->hw;
1146        int err;
1147        unsigned long flags;
1148        struct join_req {
1149                u8 bssid[ETH_ALEN];
1150                __le16 channel;
1151        } __packed req;
1152        const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
1153        struct prism2_scan_apinfo *atom = NULL;
1154        int offset = 4;
1155        int found = 0;
1156        u8 *buf;
1157        u16 len;
1158
1159        /* Allocate buffer for scan results */
1160        buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
1161        if (!buf)
1162                return;
1163
1164        if (orinoco_lock(priv, &flags) != 0)
1165                goto fail_lock;
1166
1167        /* Sanity checks in case user changed something in the meantime */
1168        if (!priv->bssid_fixed)
1169                goto out;
1170
1171        if (strlen(priv->desired_essid) == 0)
1172                goto out;
1173
1174        /* Read scan results from the firmware */
1175        err = hw->ops->read_ltv(hw, USER_BAP,
1176                                HERMES_RID_SCANRESULTSTABLE,
1177                                MAX_SCAN_LEN, &len, buf);
1178        if (err) {
1179                printk(KERN_ERR "%s: Cannot read scan results\n",
1180                       dev->name);
1181                goto out;
1182        }
1183
1184        len = HERMES_RECLEN_TO_BYTES(len);
1185
1186        /* Go through the scan results looking for the channel of the AP
1187         * we were requested to join */
1188        for (; offset + atom_len <= len; offset += atom_len) {
1189                atom = (struct prism2_scan_apinfo *) (buf + offset);
1190                if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
1191                        found = 1;
1192                        break;
1193                }
1194        }
1195
1196        if (!found) {
1197                DEBUG(1, "%s: Requested AP not found in scan results\n",
1198                      dev->name);
1199                goto out;
1200        }
1201
1202        memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
1203        req.channel = atom->channel;    /* both are little-endian */
1204        err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
1205                                  &req);
1206        if (err)
1207                printk(KERN_ERR "%s: Error issuing join request\n", dev->name);
1208
1209 out:
1210        orinoco_unlock(priv, &flags);
1211
1212 fail_lock:
1213        kfree(buf);
1214}
1215
1216/* Send new BSSID to userspace */
1217static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
1218{
1219        struct net_device *dev = priv->ndev;
1220        struct hermes *hw = &priv->hw;
1221        union iwreq_data wrqu;
1222        int err;
1223
1224        err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
1225                                ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
1226        if (err != 0)
1227                return;
1228
1229        wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1230
1231        /* Send event to user space */
1232        wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1233}
1234
1235static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
1236{
1237        struct net_device *dev = priv->ndev;
1238        struct hermes *hw = &priv->hw;
1239        union iwreq_data wrqu;
1240        int err;
1241        u8 buf[88];
1242        u8 *ie;
1243
1244        if (!priv->has_wpa)
1245                return;
1246
1247        err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
1248                                sizeof(buf), NULL, &buf);
1249        if (err != 0)
1250                return;
1251
1252        ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1253        if (ie) {
1254                int rem = sizeof(buf) - (ie - &buf[0]);
1255                wrqu.data.length = ie[1] + 2;
1256                if (wrqu.data.length > rem)
1257                        wrqu.data.length = rem;
1258
1259                if (wrqu.data.length)
1260                        /* Send event to user space */
1261                        wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
1262        }
1263}
1264
1265static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
1266{
1267        struct net_device *dev = priv->ndev;
1268        struct hermes *hw = &priv->hw;
1269        union iwreq_data wrqu;
1270        int err;
1271        u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
1272        u8 *ie;
1273
1274        if (!priv->has_wpa)
1275                return;
1276
1277        err = hw->ops->read_ltv(hw, USER_BAP,
1278                                HERMES_RID_CURRENT_ASSOC_RESP_INFO,
1279                                sizeof(buf), NULL, &buf);
1280        if (err != 0)
1281                return;
1282
1283        ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1284        if (ie) {
1285                int rem = sizeof(buf) - (ie - &buf[0]);
1286                wrqu.data.length = ie[1] + 2;
1287                if (wrqu.data.length > rem)
1288                        wrqu.data.length = rem;
1289
1290                if (wrqu.data.length)
1291                        /* Send event to user space */
1292                        wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
1293        }
1294}
1295
1296static void orinoco_send_wevents(struct work_struct *work)
1297{
1298        struct orinoco_private *priv =
1299                container_of(work, struct orinoco_private, wevent_work);
1300        unsigned long flags;
1301
1302        if (orinoco_lock(priv, &flags) != 0)
1303                return;
1304
1305        orinoco_send_assocreqie_wevent(priv);
1306        orinoco_send_assocrespie_wevent(priv);
1307        orinoco_send_bssid_wevent(priv);
1308
1309        orinoco_unlock(priv, &flags);
1310}
1311
1312static void qbuf_scan(struct orinoco_private *priv, void *buf,
1313                      int len, int type)
1314{
1315        struct orinoco_scan_data *sd;
1316        unsigned long flags;
1317
1318        sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1319        if (!sd)
1320                return;
1321
1322        sd->buf = buf;
1323        sd->len = len;
1324        sd->type = type;
1325
1326        spin_lock_irqsave(&priv->scan_lock, flags);
1327        list_add_tail(&sd->list, &priv->scan_list);
1328        spin_unlock_irqrestore(&priv->scan_lock, flags);
1329
1330        schedule_work(&priv->process_scan);
1331}
1332
1333static void qabort_scan(struct orinoco_private *priv)
1334{
1335        struct orinoco_scan_data *sd;
1336        unsigned long flags;
1337
1338        sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1339        if (!sd)
1340                return;
1341
1342        sd->len = -1; /* Abort */
1343
1344        spin_lock_irqsave(&priv->scan_lock, flags);
1345        list_add_tail(&sd->list, &priv->scan_list);
1346        spin_unlock_irqrestore(&priv->scan_lock, flags);
1347
1348        schedule_work(&priv->process_scan);
1349}
1350
1351static void orinoco_process_scan_results(struct work_struct *work)
1352{
1353        struct orinoco_private *priv =
1354                container_of(work, struct orinoco_private, process_scan);
1355        struct orinoco_scan_data *sd, *temp;
1356        unsigned long flags;
1357        void *buf;
1358        int len;
1359        int type;
1360
1361        spin_lock_irqsave(&priv->scan_lock, flags);
1362        list_for_each_entry_safe(sd, temp, &priv->scan_list, list) {
1363
1364                buf = sd->buf;
1365                len = sd->len;
1366                type = sd->type;
1367
1368                list_del(&sd->list);
1369                spin_unlock_irqrestore(&priv->scan_lock, flags);
1370                kfree(sd);
1371
1372                if (len > 0) {
1373                        if (type == HERMES_INQ_CHANNELINFO)
1374                                orinoco_add_extscan_result(priv, buf, len);
1375                        else
1376                                orinoco_add_hostscan_results(priv, buf, len);
1377
1378                        kfree(buf);
1379                } else {
1380                        /* Either abort or complete the scan */
1381                        orinoco_scan_done(priv, (len < 0));
1382                }
1383
1384                spin_lock_irqsave(&priv->scan_lock, flags);
1385        }
1386        spin_unlock_irqrestore(&priv->scan_lock, flags);
1387}
1388
1389void __orinoco_ev_info(struct net_device *dev, struct hermes *hw)
1390{
1391        struct orinoco_private *priv = ndev_priv(dev);
1392        u16 infofid;
1393        struct {
1394                __le16 len;
1395                __le16 type;
1396        } __packed info;
1397        int len, type;
1398        int err;
1399
1400        /* This is an answer to an INQUIRE command that we did earlier,
1401         * or an information "event" generated by the card
1402         * The controller return to us a pseudo frame containing
1403         * the information in question - Jean II */
1404        infofid = hermes_read_regn(hw, INFOFID);
1405
1406        /* Read the info frame header - don't try too hard */
1407        err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info),
1408                                 infofid, 0);
1409        if (err) {
1410                printk(KERN_ERR "%s: error %d reading info frame. "
1411                       "Frame dropped.\n", dev->name, err);
1412                return;
1413        }
1414
1415        len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
1416        type = le16_to_cpu(info.type);
1417
1418        switch (type) {
1419        case HERMES_INQ_TALLIES: {
1420                struct hermes_tallies_frame tallies;
1421                struct iw_statistics *wstats = &priv->wstats;
1422
1423                if (len > sizeof(tallies)) {
1424                        printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
1425                               dev->name, len);
1426                        len = sizeof(tallies);
1427                }
1428
1429                err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len,
1430                                         infofid, sizeof(info));
1431                if (err)
1432                        break;
1433
1434                /* Increment our various counters */
1435                /* wstats->discard.nwid - no wrong BSSID stuff */
1436                wstats->discard.code +=
1437                        le16_to_cpu(tallies.RxWEPUndecryptable);
1438                if (len == sizeof(tallies))
1439                        wstats->discard.code +=
1440                                le16_to_cpu(tallies.RxDiscards_WEPICVError) +
1441                                le16_to_cpu(tallies.RxDiscards_WEPExcluded);
1442                wstats->discard.misc +=
1443                        le16_to_cpu(tallies.TxDiscardsWrongSA);
1444                wstats->discard.fragment +=
1445                        le16_to_cpu(tallies.RxMsgInBadMsgFragments);
1446                wstats->discard.retries +=
1447                        le16_to_cpu(tallies.TxRetryLimitExceeded);
1448                /* wstats->miss.beacon - no match */
1449        }
1450        break;
1451        case HERMES_INQ_LINKSTATUS: {
1452                struct hermes_linkstatus linkstatus;
1453                u16 newstatus;
1454                int connected;
1455
1456                if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
1457                        break;
1458
1459                if (len != sizeof(linkstatus)) {
1460                        printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
1461                               dev->name, len);
1462                        break;
1463                }
1464
1465                err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len,
1466                                         infofid, sizeof(info));
1467                if (err)
1468                        break;
1469                newstatus = le16_to_cpu(linkstatus.linkstatus);
1470
1471                /* Symbol firmware uses "out of range" to signal that
1472                 * the hostscan frame can be requested.  */
1473                if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
1474                    priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
1475                    priv->has_hostscan && priv->scan_request) {
1476                        hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
1477                        break;
1478                }
1479
1480                connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
1481                        || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
1482                        || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);
1483
1484                if (connected)
1485                        netif_carrier_on(dev);
1486                else if (!ignore_disconnect)
1487                        netif_carrier_off(dev);
1488
1489                if (newstatus != priv->last_linkstatus) {
1490                        priv->last_linkstatus = newstatus;
1491                        print_linkstatus(dev, newstatus);
1492                        /* The info frame contains only one word which is the
1493                         * status (see hermes.h). The status is pretty boring
1494                         * in itself, that's why we export the new BSSID...
1495                         * Jean II */
1496                        schedule_work(&priv->wevent_work);
1497                }
1498        }
1499        break;
1500        case HERMES_INQ_SCAN:
1501                if (!priv->scan_request && priv->bssid_fixed &&
1502                    priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
1503                        schedule_work(&priv->join_work);
1504                        break;
1505                }
1506                fallthrough;
1507        case HERMES_INQ_HOSTSCAN:
1508        case HERMES_INQ_HOSTSCAN_SYMBOL: {
1509                /* Result of a scanning. Contains information about
1510                 * cells in the vicinity - Jean II */
1511                unsigned char *buf;
1512
1513                /* Sanity check */
1514                if (len > 4096) {
1515                        printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
1516                               dev->name, len);
1517                        qabort_scan(priv);
1518                        break;
1519                }
1520
1521                /* Allocate buffer for results */
1522                buf = kmalloc(len, GFP_ATOMIC);
1523                if (buf == NULL) {
1524                        /* No memory, so can't printk()... */
1525                        qabort_scan(priv);
1526                        break;
1527                }
1528
1529                /* Read scan data */
1530                err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len,
1531                                         infofid, sizeof(info));
1532                if (err) {
1533                        kfree(buf);
1534                        qabort_scan(priv);
1535                        break;
1536                }
1537
1538#ifdef ORINOCO_DEBUG
1539                {
1540                        int     i;
1541                        printk(KERN_DEBUG "Scan result [%02X", buf[0]);
1542                        for (i = 1; i < (len * 2); i++)
1543                                printk(":%02X", buf[i]);
1544                        printk("]\n");
1545                }
1546#endif  /* ORINOCO_DEBUG */
1547
1548                qbuf_scan(priv, buf, len, type);
1549        }
1550        break;
1551        case HERMES_INQ_CHANNELINFO:
1552        {
1553                struct agere_ext_scan_info *bss;
1554
1555                if (!priv->scan_request) {
1556                        printk(KERN_DEBUG "%s: Got chaninfo without scan, "
1557                               "len=%d\n", dev->name, len);
1558                        break;
1559                }
1560
1561                /* An empty result indicates that the scan is complete */
1562                if (len == 0) {
1563                        qbuf_scan(priv, NULL, len, type);
1564                        break;
1565                }
1566
1567                /* Sanity check */
1568                else if (len < (offsetof(struct agere_ext_scan_info,
1569                                           data) + 2)) {
1570                        /* Drop this result now so we don't have to
1571                         * keep checking later */
1572                        printk(KERN_WARNING
1573                               "%s: Ext scan results too short (%d bytes)\n",
1574                               dev->name, len);
1575                        break;
1576                }
1577
1578                bss = kmalloc(len, GFP_ATOMIC);
1579                if (bss == NULL)
1580                        break;
1581
1582                /* Read scan data */
1583                err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len,
1584                                         infofid, sizeof(info));
1585                if (err)
1586                        kfree(bss);
1587                else
1588                        qbuf_scan(priv, bss, len, type);
1589
1590                break;
1591        }
1592        case HERMES_INQ_SEC_STAT_AGERE:
1593                /* Security status (Agere specific) */
1594                /* Ignore this frame for now */
1595                if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
1596                        break;
1597                fallthrough;
1598        default:
1599                printk(KERN_DEBUG "%s: Unknown information frame received: "
1600                       "type 0x%04x, length %d\n", dev->name, type, len);
1601                /* We don't actually do anything about it */
1602                break;
1603        }
1604}
1605EXPORT_SYMBOL(__orinoco_ev_info);
1606
1607static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw)
1608{
1609        if (net_ratelimit())
1610                printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
1611}
1612
1613/********************************************************************/
1614/* Internal hardware control routines                               */
1615/********************************************************************/
1616
1617static int __orinoco_up(struct orinoco_private *priv)
1618{
1619        struct net_device *dev = priv->ndev;
1620        struct hermes *hw = &priv->hw;
1621        int err;
1622
1623        netif_carrier_off(dev); /* just to make sure */
1624
1625        err = __orinoco_commit(priv);
1626        if (err) {
1627                printk(KERN_ERR "%s: Error %d configuring card\n",
1628                       dev->name, err);
1629                return err;
1630        }
1631
1632        /* Fire things up again */
1633        hermes_set_irqmask(hw, ORINOCO_INTEN);
1634        err = hermes_enable_port(hw, 0);
1635        if (err) {
1636                printk(KERN_ERR "%s: Error %d enabling MAC port\n",
1637                       dev->name, err);
1638                return err;
1639        }
1640
1641        netif_start_queue(dev);
1642
1643        return 0;
1644}
1645
1646static int __orinoco_down(struct orinoco_private *priv)
1647{
1648        struct net_device *dev = priv->ndev;
1649        struct hermes *hw = &priv->hw;
1650        int err;
1651
1652        netif_stop_queue(dev);
1653
1654        if (!priv->hw_unavailable) {
1655                if (!priv->broken_disableport) {
1656                        err = hermes_disable_port(hw, 0);
1657                        if (err) {
1658                                /* Some firmwares (e.g. Intersil 1.3.x) seem
1659                                 * to have problems disabling the port, oh
1660                                 * well, too bad. */
1661                                printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
1662                                       dev->name, err);
1663                                priv->broken_disableport = 1;
1664                        }
1665                }
1666                hermes_set_irqmask(hw, 0);
1667                hermes_write_regn(hw, EVACK, 0xffff);
1668        }
1669
1670        orinoco_scan_done(priv, true);
1671
1672        /* firmware will have to reassociate */
1673        netif_carrier_off(dev);
1674        priv->last_linkstatus = 0xffff;
1675
1676        return 0;
1677}
1678
1679static int orinoco_reinit_firmware(struct orinoco_private *priv)
1680{
1681        struct hermes *hw = &priv->hw;
1682        int err;
1683
1684        err = hw->ops->init(hw);
1685        if (priv->do_fw_download && !err) {
1686                err = orinoco_download(priv);
1687                if (err)
1688                        priv->do_fw_download = 0;
1689        }
1690        if (!err)
1691                err = orinoco_hw_allocate_fid(priv);
1692
1693        return err;
1694}
1695
1696static int
1697__orinoco_set_multicast_list(struct net_device *dev)
1698{
1699        struct orinoco_private *priv = ndev_priv(dev);
1700        int err = 0;
1701        int promisc, mc_count;
1702
1703        /* The Hermes doesn't seem to have an allmulti mode, so we go
1704         * into promiscuous mode and let the upper levels deal. */
1705        if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
1706            (netdev_mc_count(dev) > MAX_MULTICAST(priv))) {
1707                promisc = 1;
1708                mc_count = 0;
1709        } else {
1710                promisc = 0;
1711                mc_count = netdev_mc_count(dev);
1712        }
1713
1714        err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc);
1715
1716        return err;
1717}
1718
1719/* This must be called from user context, without locks held - use
1720 * schedule_work() */
1721void orinoco_reset(struct work_struct *work)
1722{
1723        struct orinoco_private *priv =
1724                container_of(work, struct orinoco_private, reset_work);
1725        struct net_device *dev = priv->ndev;
1726        struct hermes *hw = &priv->hw;
1727        int err;
1728        unsigned long flags;
1729
1730        if (orinoco_lock(priv, &flags) != 0)
1731                /* When the hardware becomes available again, whatever
1732                 * detects that is responsible for re-initializing
1733                 * it. So no need for anything further */
1734                return;
1735
1736        netif_stop_queue(dev);
1737
1738        /* Shut off interrupts.  Depending on what state the hardware
1739         * is in, this might not work, but we'll try anyway */
1740        hermes_set_irqmask(hw, 0);
1741        hermes_write_regn(hw, EVACK, 0xffff);
1742
1743        priv->hw_unavailable++;
1744        priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
1745        netif_carrier_off(dev);
1746
1747        orinoco_unlock(priv, &flags);
1748
1749        /* Scanning support: Notify scan cancellation */
1750        orinoco_scan_done(priv, true);
1751
1752        if (priv->hard_reset) {
1753                err = (*priv->hard_reset)(priv);
1754                if (err) {
1755                        printk(KERN_ERR "%s: orinoco_reset: Error %d "
1756                               "performing hard reset\n", dev->name, err);
1757                        goto disable;
1758                }
1759        }
1760
1761        err = orinoco_reinit_firmware(priv);
1762        if (err) {
1763                printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
1764                       dev->name, err);
1765                goto disable;
1766        }
1767
1768        /* This has to be called from user context */
1769        orinoco_lock_irq(priv);
1770
1771        priv->hw_unavailable--;
1772
1773        /* priv->open or priv->hw_unavailable might have changed while
1774         * we dropped the lock */
1775        if (priv->open && (!priv->hw_unavailable)) {
1776                err = __orinoco_up(priv);
1777                if (err) {
1778                        printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
1779                               dev->name, err);
1780                } else
1781                        netif_trans_update(dev);
1782        }
1783
1784        orinoco_unlock_irq(priv);
1785
1786        return;
1787 disable:
1788        hermes_set_irqmask(hw, 0);
1789        netif_device_detach(dev);
1790        printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
1791}
1792
1793static int __orinoco_commit(struct orinoco_private *priv)
1794{
1795        struct net_device *dev = priv->ndev;
1796        int err = 0;
1797
1798        /* If we've called commit, we are reconfiguring or bringing the
1799         * interface up. Maintaining countermeasures across this would
1800         * be confusing, so note that we've disabled them. The port will
1801         * be enabled later in orinoco_commit or __orinoco_up. */
1802        priv->tkip_cm_active = 0;
1803
1804        err = orinoco_hw_program_rids(priv);
1805
1806        /* FIXME: what about netif_tx_lock */
1807        (void) __orinoco_set_multicast_list(dev);
1808
1809        return err;
1810}
1811
1812/* Ensures configuration changes are applied. May result in a reset.
1813 * The caller should hold priv->lock
1814 */
1815int orinoco_commit(struct orinoco_private *priv)
1816{
1817        struct net_device *dev = priv->ndev;
1818        struct hermes *hw = &priv->hw;
1819        int err;
1820
1821        if (priv->broken_disableport) {
1822                schedule_work(&priv->reset_work);
1823                return 0;
1824        }
1825
1826        err = hermes_disable_port(hw, 0);
1827        if (err) {
1828                printk(KERN_WARNING "%s: Unable to disable port "
1829                       "while reconfiguring card\n", dev->name);
1830                priv->broken_disableport = 1;
1831                goto out;
1832        }
1833
1834        err = __orinoco_commit(priv);
1835        if (err) {
1836                printk(KERN_WARNING "%s: Unable to reconfigure card\n",
1837                       dev->name);
1838                goto out;
1839        }
1840
1841        err = hermes_enable_port(hw, 0);
1842        if (err) {
1843                printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
1844                       dev->name);
1845                goto out;
1846        }
1847
1848 out:
1849        if (err) {
1850                printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
1851                schedule_work(&priv->reset_work);
1852                err = 0;
1853        }
1854        return err;
1855}
1856
1857/********************************************************************/
1858/* Interrupt handler                                                */
1859/********************************************************************/
1860
1861static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw)
1862{
1863        printk(KERN_DEBUG "%s: TICK\n", dev->name);
1864}
1865
1866static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw)
1867{
1868        /* This seems to happen a fair bit under load, but ignoring it
1869           seems to work fine...*/
1870        printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
1871               dev->name);
1872}
1873
1874irqreturn_t orinoco_interrupt(int irq, void *dev_id)
1875{
1876        struct orinoco_private *priv = dev_id;
1877        struct net_device *dev = priv->ndev;
1878        struct hermes *hw = &priv->hw;
1879        int count = MAX_IRQLOOPS_PER_IRQ;
1880        u16 evstat, events;
1881        /* These are used to detect a runaway interrupt situation.
1882         *
1883         * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
1884         * we panic and shut down the hardware
1885         */
1886        /* jiffies value the last time we were called */
1887        static int last_irq_jiffy; /* = 0 */
1888        static int loops_this_jiffy; /* = 0 */
1889        unsigned long flags;
1890
1891        if (orinoco_lock(priv, &flags) != 0) {
1892                /* If hw is unavailable - we don't know if the irq was
1893                 * for us or not */
1894                return IRQ_HANDLED;
1895        }
1896
1897        evstat = hermes_read_regn(hw, EVSTAT);
1898        events = evstat & hw->inten;
1899        if (!events) {
1900                orinoco_unlock(priv, &flags);
1901                return IRQ_NONE;
1902        }
1903
1904        if (jiffies != last_irq_jiffy)
1905                loops_this_jiffy = 0;
1906        last_irq_jiffy = jiffies;
1907
1908        while (events && count--) {
1909                if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
1910                        printk(KERN_WARNING "%s: IRQ handler is looping too "
1911                               "much! Resetting.\n", dev->name);
1912                        /* Disable interrupts for now */
1913                        hermes_set_irqmask(hw, 0);
1914                        schedule_work(&priv->reset_work);
1915                        break;
1916                }
1917
1918                /* Check the card hasn't been removed */
1919                if (!hermes_present(hw)) {
1920                        DEBUG(0, "orinoco_interrupt(): card removed\n");
1921                        break;
1922                }
1923
1924                if (events & HERMES_EV_TICK)
1925                        __orinoco_ev_tick(dev, hw);
1926                if (events & HERMES_EV_WTERR)
1927                        __orinoco_ev_wterr(dev, hw);
1928                if (events & HERMES_EV_INFDROP)
1929                        __orinoco_ev_infdrop(dev, hw);
1930                if (events & HERMES_EV_INFO)
1931                        __orinoco_ev_info(dev, hw);
1932                if (events & HERMES_EV_RX)
1933                        __orinoco_ev_rx(dev, hw);
1934                if (events & HERMES_EV_TXEXC)
1935                        __orinoco_ev_txexc(dev, hw);
1936                if (events & HERMES_EV_TX)
1937                        __orinoco_ev_tx(dev, hw);
1938                if (events & HERMES_EV_ALLOC)
1939                        __orinoco_ev_alloc(dev, hw);
1940
1941                hermes_write_regn(hw, EVACK, evstat);
1942
1943                evstat = hermes_read_regn(hw, EVSTAT);
1944                events = evstat & hw->inten;
1945        }
1946
1947        orinoco_unlock(priv, &flags);
1948        return IRQ_HANDLED;
1949}
1950EXPORT_SYMBOL(orinoco_interrupt);
1951
1952/********************************************************************/
1953/* Power management                                                 */
1954/********************************************************************/
1955#if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
1956static int orinoco_pm_notifier(struct notifier_block *notifier,
1957                               unsigned long pm_event,
1958                               void *unused)
1959{
1960        struct orinoco_private *priv = container_of(notifier,
1961                                                    struct orinoco_private,
1962                                                    pm_notifier);
1963
1964        /* All we need to do is cache the firmware before suspend, and
1965         * release it when we come out.
1966         *
1967         * Only need to do this if we're downloading firmware. */
1968        if (!priv->do_fw_download)
1969                return NOTIFY_DONE;
1970
1971        switch (pm_event) {
1972        case PM_HIBERNATION_PREPARE:
1973        case PM_SUSPEND_PREPARE:
1974                orinoco_cache_fw(priv, 0);
1975                break;
1976
1977        case PM_POST_RESTORE:
1978                /* Restore from hibernation failed. We need to clean
1979                 * up in exactly the same way, so fall through. */
1980        case PM_POST_HIBERNATION:
1981        case PM_POST_SUSPEND:
1982                orinoco_uncache_fw(priv);
1983                break;
1984
1985        case PM_RESTORE_PREPARE:
1986        default:
1987                break;
1988        }
1989
1990        return NOTIFY_DONE;
1991}
1992
1993static void orinoco_register_pm_notifier(struct orinoco_private *priv)
1994{
1995        priv->pm_notifier.notifier_call = orinoco_pm_notifier;
1996        register_pm_notifier(&priv->pm_notifier);
1997}
1998
1999static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
2000{
2001        unregister_pm_notifier(&priv->pm_notifier);
2002}
2003#else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
2004#define orinoco_register_pm_notifier(priv) do { } while (0)
2005#define orinoco_unregister_pm_notifier(priv) do { } while (0)
2006#endif
2007
2008/********************************************************************/
2009/* Initialization                                                   */
2010/********************************************************************/
2011
2012int orinoco_init(struct orinoco_private *priv)
2013{
2014        struct device *dev = priv->dev;
2015        struct wiphy *wiphy = priv_to_wiphy(priv);
2016        struct hermes *hw = &priv->hw;
2017        int err = 0;
2018
2019        /* No need to lock, the hw_unavailable flag is already set in
2020         * alloc_orinocodev() */
2021        priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;
2022
2023        /* Initialize the firmware */
2024        err = hw->ops->init(hw);
2025        if (err != 0) {
2026                dev_err(dev, "Failed to initialize firmware (err = %d)\n",
2027                        err);
2028                goto out;
2029        }
2030
2031        err = determine_fw_capabilities(priv, wiphy->fw_version,
2032                                        sizeof(wiphy->fw_version),
2033                                        &wiphy->hw_version);
2034        if (err != 0) {
2035                dev_err(dev, "Incompatible firmware, aborting\n");
2036                goto out;
2037        }
2038
2039        if (priv->do_fw_download) {
2040#ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
2041                orinoco_cache_fw(priv, 0);
2042#endif
2043
2044                err = orinoco_download(priv);
2045                if (err)
2046                        priv->do_fw_download = 0;
2047
2048                /* Check firmware version again */
2049                err = determine_fw_capabilities(priv, wiphy->fw_version,
2050                                                sizeof(wiphy->fw_version),
2051                                                &wiphy->hw_version);
2052                if (err != 0) {
2053                        dev_err(dev, "Incompatible firmware, aborting\n");
2054                        goto out;
2055                }
2056        }
2057
2058        if (priv->has_port3)
2059                dev_info(dev, "Ad-hoc demo mode supported\n");
2060        if (priv->has_ibss)
2061                dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n");
2062        if (priv->has_wep)
2063                dev_info(dev, "WEP supported, %s-bit key\n",
2064                         priv->has_big_wep ? "104" : "40");
2065        if (priv->has_wpa) {
2066                dev_info(dev, "WPA-PSK supported\n");
2067                if (orinoco_mic_init(priv)) {
2068                        dev_err(dev, "Failed to setup MIC crypto algorithm. "
2069                                "Disabling WPA support\n");
2070                        priv->has_wpa = 0;
2071                }
2072        }
2073
2074        err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr);
2075        if (err)
2076                goto out;
2077
2078        err = orinoco_hw_allocate_fid(priv);
2079        if (err) {
2080                dev_err(dev, "Failed to allocate NIC buffer!\n");
2081                goto out;
2082        }
2083
2084        /* Set up the default configuration */
2085        priv->iw_mode = NL80211_IFTYPE_STATION;
2086        /* By default use IEEE/IBSS ad-hoc mode if we have it */
2087        priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
2088        set_port_type(priv);
2089        priv->channel = 0; /* use firmware default */
2090
2091        priv->promiscuous = 0;
2092        priv->encode_alg = ORINOCO_ALG_NONE;
2093        priv->tx_key = 0;
2094        priv->wpa_enabled = 0;
2095        priv->tkip_cm_active = 0;
2096        priv->key_mgmt = 0;
2097        priv->wpa_ie_len = 0;
2098        priv->wpa_ie = NULL;
2099
2100        if (orinoco_wiphy_register(wiphy)) {
2101                err = -ENODEV;
2102                goto out;
2103        }
2104
2105        /* Make the hardware available, as long as it hasn't been
2106         * removed elsewhere (e.g. by PCMCIA hot unplug) */
2107        orinoco_lock_irq(priv);
2108        priv->hw_unavailable--;
2109        orinoco_unlock_irq(priv);
2110
2111        dev_dbg(dev, "Ready\n");
2112
2113 out:
2114        return err;
2115}
2116EXPORT_SYMBOL(orinoco_init);
2117
2118static const struct net_device_ops orinoco_netdev_ops = {
2119        .ndo_open               = orinoco_open,
2120        .ndo_stop               = orinoco_stop,
2121        .ndo_start_xmit         = orinoco_xmit,
2122        .ndo_set_rx_mode        = orinoco_set_multicast_list,
2123        .ndo_change_mtu         = orinoco_change_mtu,
2124        .ndo_set_mac_address    = eth_mac_addr,
2125        .ndo_validate_addr      = eth_validate_addr,
2126        .ndo_tx_timeout         = orinoco_tx_timeout,
2127};
2128
2129/* Allocate private data.
2130 *
2131 * This driver has a number of structures associated with it
2132 *  netdev - Net device structure for each network interface
2133 *  wiphy - structure associated with wireless phy
2134 *  wireless_dev (wdev) - structure for each wireless interface
2135 *  hw - structure for hermes chip info
2136 *  card - card specific structure for use by the card driver
2137 *         (airport, orinoco_cs)
2138 *  priv - orinoco private data
2139 *  device - generic linux device structure
2140 *
2141 *  +---------+    +---------+
2142 *  |  wiphy  |    | netdev  |
2143 *  | +-------+    | +-------+
2144 *  | | priv  |    | | wdev  |
2145 *  | | +-----+    +-+-------+
2146 *  | | | hw  |
2147 *  | +-+-----+
2148 *  | | card  |
2149 *  +-+-------+
2150 *
2151 * priv has a link to netdev and device
2152 * wdev has a link to wiphy
2153 */
2154struct orinoco_private
2155*alloc_orinocodev(int sizeof_card,
2156                  struct device *device,
2157                  int (*hard_reset)(struct orinoco_private *),
2158                  int (*stop_fw)(struct orinoco_private *, int))
2159{
2160        struct orinoco_private *priv;
2161        struct wiphy *wiphy;
2162
2163        /* allocate wiphy
2164         * NOTE: We only support a single virtual interface
2165         *       but this may change when monitor mode is added
2166         */
2167        wiphy = wiphy_new(&orinoco_cfg_ops,
2168                          sizeof(struct orinoco_private) + sizeof_card);
2169        if (!wiphy)
2170                return NULL;
2171
2172        priv = wiphy_priv(wiphy);
2173        priv->dev = device;
2174
2175        if (sizeof_card)
2176                priv->card = (void *)((unsigned long)priv
2177                                      + sizeof(struct orinoco_private));
2178        else
2179                priv->card = NULL;
2180
2181        orinoco_wiphy_init(wiphy);
2182
2183#ifdef WIRELESS_SPY
2184        priv->wireless_data.spy_data = &priv->spy_data;
2185#endif
2186
2187        /* Set up default callbacks */
2188        priv->hard_reset = hard_reset;
2189        priv->stop_fw = stop_fw;
2190
2191        spin_lock_init(&priv->lock);
2192        priv->open = 0;
2193        priv->hw_unavailable = 1; /* orinoco_init() must clear this
2194                                   * before anything else touches the
2195                                   * hardware */
2196        INIT_WORK(&priv->reset_work, orinoco_reset);
2197        INIT_WORK(&priv->join_work, orinoco_join_ap);
2198        INIT_WORK(&priv->wevent_work, orinoco_send_wevents);
2199
2200        INIT_LIST_HEAD(&priv->rx_list);
2201        tasklet_setup(&priv->rx_tasklet, orinoco_rx_isr_tasklet);
2202
2203        spin_lock_init(&priv->scan_lock);
2204        INIT_LIST_HEAD(&priv->scan_list);
2205        INIT_WORK(&priv->process_scan, orinoco_process_scan_results);
2206
2207        priv->last_linkstatus = 0xffff;
2208
2209#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
2210        priv->cached_pri_fw = NULL;
2211        priv->cached_fw = NULL;
2212#endif
2213
2214        /* Register PM notifiers */
2215        orinoco_register_pm_notifier(priv);
2216
2217        return priv;
2218}
2219EXPORT_SYMBOL(alloc_orinocodev);
2220
2221/* We can only support a single interface. We provide a separate
2222 * function to set it up to distinguish between hardware
2223 * initialisation and interface setup.
2224 *
2225 * The base_addr and irq parameters are passed on to netdev for use
2226 * with SIOCGIFMAP.
2227 */
2228int orinoco_if_add(struct orinoco_private *priv,
2229                   unsigned long base_addr,
2230                   unsigned int irq,
2231                   const struct net_device_ops *ops)
2232{
2233        struct wiphy *wiphy = priv_to_wiphy(priv);
2234        struct wireless_dev *wdev;
2235        struct net_device *dev;
2236        int ret;
2237
2238        dev = alloc_etherdev(sizeof(struct wireless_dev));
2239
2240        if (!dev)
2241                return -ENOMEM;
2242
2243        /* Initialise wireless_dev */
2244        wdev = netdev_priv(dev);
2245        wdev->wiphy = wiphy;
2246        wdev->iftype = NL80211_IFTYPE_STATION;
2247
2248        /* Setup / override net_device fields */
2249        dev->ieee80211_ptr = wdev;
2250        dev->watchdog_timeo = HZ; /* 1 second timeout */
2251        dev->wireless_handlers = &orinoco_handler_def;
2252#ifdef WIRELESS_SPY
2253        dev->wireless_data = &priv->wireless_data;
2254#endif
2255        /* Default to standard ops if not set */
2256        if (ops)
2257                dev->netdev_ops = ops;
2258        else
2259                dev->netdev_ops = &orinoco_netdev_ops;
2260
2261        /* we use the default eth_mac_addr for setting the MAC addr */
2262
2263        /* Reserve space in skb for the SNAP header */
2264        dev->needed_headroom = ENCAPS_OVERHEAD;
2265
2266        netif_carrier_off(dev);
2267
2268        memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
2269
2270        dev->base_addr = base_addr;
2271        dev->irq = irq;
2272
2273        dev->min_mtu = ORINOCO_MIN_MTU;
2274        dev->max_mtu = ORINOCO_MAX_MTU;
2275
2276        SET_NETDEV_DEV(dev, priv->dev);
2277        ret = register_netdev(dev);
2278        if (ret)
2279                goto fail;
2280
2281        priv->ndev = dev;
2282
2283        /* Report what we've done */
2284        dev_dbg(priv->dev, "Registered interface %s.\n", dev->name);
2285
2286        return 0;
2287
2288 fail:
2289        free_netdev(dev);
2290        return ret;
2291}
2292EXPORT_SYMBOL(orinoco_if_add);
2293
2294void orinoco_if_del(struct orinoco_private *priv)
2295{
2296        struct net_device *dev = priv->ndev;
2297
2298        unregister_netdev(dev);
2299        free_netdev(dev);
2300}
2301EXPORT_SYMBOL(orinoco_if_del);
2302
2303void free_orinocodev(struct orinoco_private *priv)
2304{
2305        struct wiphy *wiphy = priv_to_wiphy(priv);
2306        struct orinoco_rx_data *rx_data, *temp;
2307        struct orinoco_scan_data *sd, *sdtemp;
2308
2309        /* If the tasklet is scheduled when we call tasklet_kill it
2310         * will run one final time. However the tasklet will only
2311         * drain priv->rx_list if the hw is still available. */
2312        tasklet_kill(&priv->rx_tasklet);
2313
2314        /* Explicitly drain priv->rx_list */
2315        list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
2316                list_del(&rx_data->list);
2317
2318                dev_kfree_skb(rx_data->skb);
2319                kfree(rx_data->desc);
2320                kfree(rx_data);
2321        }
2322
2323        cancel_work_sync(&priv->process_scan);
2324        /* Explicitly drain priv->scan_list */
2325        list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) {
2326                list_del(&sd->list);
2327
2328                if (sd->len > 0)
2329                        kfree(sd->buf);
2330                kfree(sd);
2331        }
2332
2333        orinoco_unregister_pm_notifier(priv);
2334        orinoco_uncache_fw(priv);
2335
2336        priv->wpa_ie_len = 0;
2337        kfree(priv->wpa_ie);
2338        orinoco_mic_free(priv);
2339        wiphy_free(wiphy);
2340}
2341EXPORT_SYMBOL(free_orinocodev);
2342
2343int orinoco_up(struct orinoco_private *priv)
2344{
2345        struct net_device *dev = priv->ndev;
2346        unsigned long flags;
2347        int err;
2348
2349        priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2350
2351        err = orinoco_reinit_firmware(priv);
2352        if (err) {
2353                printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
2354                       dev->name, err);
2355                goto exit;
2356        }
2357
2358        netif_device_attach(dev);
2359        priv->hw_unavailable--;
2360
2361        if (priv->open && !priv->hw_unavailable) {
2362                err = __orinoco_up(priv);
2363                if (err)
2364                        printk(KERN_ERR "%s: Error %d restarting card\n",
2365                               dev->name, err);
2366        }
2367
2368exit:
2369        priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2370
2371        return 0;
2372}
2373EXPORT_SYMBOL(orinoco_up);
2374
2375void orinoco_down(struct orinoco_private *priv)
2376{
2377        struct net_device *dev = priv->ndev;
2378        unsigned long flags;
2379        int err;
2380
2381        priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2382        err = __orinoco_down(priv);
2383        if (err)
2384                printk(KERN_WARNING "%s: Error %d downing interface\n",
2385                       dev->name, err);
2386
2387        netif_device_detach(dev);
2388        priv->hw_unavailable++;
2389        priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2390}
2391EXPORT_SYMBOL(orinoco_down);
2392
2393/********************************************************************/
2394/* Module initialization                                            */
2395/********************************************************************/
2396
2397/* Can't be declared "const" or the whole __initdata section will
2398 * become const */
2399static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
2400        " (David Gibson <hermes@gibson.dropbear.id.au>, "
2401        "Pavel Roskin <proski@gnu.org>, et al)";
2402
2403static int __init init_orinoco(void)
2404{
2405        printk(KERN_DEBUG "%s\n", version);
2406        return 0;
2407}
2408
2409static void __exit exit_orinoco(void)
2410{
2411}
2412
2413module_init(init_orinoco);
2414module_exit(exit_orinoco);
2415
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.