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[~shefty/rdma-dev.git] / drivers / net / wireless / orinoco / main.c
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
110 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
111               "David Gibson <hermes@gibson.dropbear.id.au>");
112 MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
113                    "and similar wireless cards");
114 MODULE_LICENSE("Dual MPL/GPL");
115
116 /* Level of debugging. Used in the macros in orinoco.h */
117 #ifdef ORINOCO_DEBUG
118 int orinoco_debug = ORINOCO_DEBUG;
119 EXPORT_SYMBOL(orinoco_debug);
120 module_param(orinoco_debug, int, 0644);
121 MODULE_PARM_DESC(orinoco_debug, "Debug level");
122 #endif
123
124 static int suppress_linkstatus; /* = 0 */
125 module_param(suppress_linkstatus, bool, 0644);
126 MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
127
128 static int ignore_disconnect; /* = 0 */
129 module_param(ignore_disconnect, int, 0644);
130 MODULE_PARM_DESC(ignore_disconnect,
131                  "Don't report lost link to the network layer");
132
133 int force_monitor; /* = 0 */
134 module_param(force_monitor, int, 0644);
135 MODULE_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 */
142 static 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 */
170 struct 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 */
178 struct 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
201 struct orinoco_rx_data {
202         struct hermes_rx_descriptor *desc;
203         struct sk_buff *skb;
204         struct list_head list;
205 };
206
207 struct 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
218 static int __orinoco_set_multicast_list(struct net_device *dev);
219 static int __orinoco_up(struct orinoco_private *priv);
220 static int __orinoco_down(struct orinoco_private *priv);
221 static int __orinoco_commit(struct orinoco_private *priv);
222
223 /********************************************************************/
224 /* Internal helper functions                                        */
225 /********************************************************************/
226
227 void 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
257 int 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 }
275 EXPORT_SYMBOL(orinoco_open);
276
277 int 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 }
295 EXPORT_SYMBOL(orinoco_stop);
296
297 struct net_device_stats *orinoco_get_stats(struct net_device *dev)
298 {
299         struct orinoco_private *priv = ndev_priv(dev);
300
301         return &priv->stats;
302 }
303 EXPORT_SYMBOL(orinoco_get_stats);
304
305 void orinoco_set_multicast_list(struct net_device *dev)
306 {
307         struct orinoco_private *priv = ndev_priv(dev);
308         unsigned long flags;
309
310         if (orinoco_lock(priv, &flags) != 0) {
311                 printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
312                        "called when hw_unavailable\n", dev->name);
313                 return;
314         }
315
316         __orinoco_set_multicast_list(dev);
317         orinoco_unlock(priv, &flags);
318 }
319 EXPORT_SYMBOL(orinoco_set_multicast_list);
320
321 int orinoco_change_mtu(struct net_device *dev, int new_mtu)
322 {
323         struct orinoco_private *priv = ndev_priv(dev);
324
325         if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU))
326                 return -EINVAL;
327
328         /* MTU + encapsulation + header length */
329         if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
330              (priv->nicbuf_size - ETH_HLEN))
331                 return -EINVAL;
332
333         dev->mtu = new_mtu;
334
335         return 0;
336 }
337 EXPORT_SYMBOL(orinoco_change_mtu);
338
339 /********************************************************************/
340 /* Tx path                                                          */
341 /********************************************************************/
342
343 /* Add encapsulation and MIC to the existing SKB.
344  * The main xmit routine will then send the whole lot to the card.
345  * Need 8 bytes headroom
346  * Need 8 bytes tailroom
347  *
348  *                          With encapsulated ethernet II frame
349  *                          --------
350  *                          803.3 header (14 bytes)
351  *                           dst[6]
352  * --------                  src[6]
353  * 803.3 header (14 bytes)   len[2]
354  *  dst[6]                  803.2 header (8 bytes)
355  *  src[6]                   encaps[6]
356  *  len[2] <- leave alone -> len[2]
357  * --------                 -------- <-- 0
358  * Payload                  Payload
359  * ...                      ...
360  *
361  * --------                 --------
362  *                          MIC (8 bytes)
363  *                          --------
364  *
365  * returns 0 on success, -ENOMEM on error.
366  */
367 int orinoco_process_xmit_skb(struct sk_buff *skb,
368                              struct net_device *dev,
369                              struct orinoco_private *priv,
370                              int *tx_control,
371                              u8 *mic_buf)
372 {
373         struct orinoco_tkip_key *key;
374         struct ethhdr *eh;
375         int do_mic;
376
377         key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key;
378
379         do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) &&
380                   (key != NULL));
381
382         if (do_mic)
383                 *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
384                         HERMES_TXCTRL_MIC;
385
386         eh = (struct ethhdr *)skb->data;
387
388         /* Encapsulate Ethernet-II frames */
389         if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
390                 struct header_struct {
391                         struct ethhdr eth;      /* 802.3 header */
392                         u8 encap[6];            /* 802.2 header */
393                 } __packed hdr;
394                 int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN);
395
396                 if (skb_headroom(skb) < ENCAPS_OVERHEAD) {
397                         if (net_ratelimit())
398                                 printk(KERN_ERR
399                                        "%s: Not enough headroom for 802.2 headers %d\n",
400                                        dev->name, skb_headroom(skb));
401                         return -ENOMEM;
402                 }
403
404                 /* Fill in new header */
405                 memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
406                 hdr.eth.h_proto = htons(len);
407                 memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
408
409                 /* Make room for the new header, and copy it in */
410                 eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD);
411                 memcpy(eh, &hdr, sizeof(hdr));
412         }
413
414         /* Calculate Michael MIC */
415         if (do_mic) {
416                 size_t len = skb->len - ETH_HLEN;
417                 u8 *mic = &mic_buf[0];
418
419                 /* Have to write to an even address, so copy the spare
420                  * byte across */
421                 if (skb->len % 2) {
422                         *mic = skb->data[skb->len - 1];
423                         mic++;
424                 }
425
426                 orinoco_mic(priv->tx_tfm_mic, key->tx_mic,
427                             eh->h_dest, eh->h_source, 0 /* priority */,
428                             skb->data + ETH_HLEN,
429                             len, mic);
430         }
431
432         return 0;
433 }
434 EXPORT_SYMBOL(orinoco_process_xmit_skb);
435
436 static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
437 {
438         struct orinoco_private *priv = ndev_priv(dev);
439         struct net_device_stats *stats = &priv->stats;
440         hermes_t *hw = &priv->hw;
441         int err = 0;
442         u16 txfid = priv->txfid;
443         int tx_control;
444         unsigned long flags;
445         u8 mic_buf[MICHAEL_MIC_LEN+1];
446
447         if (!netif_running(dev)) {
448                 printk(KERN_ERR "%s: Tx on stopped device!\n",
449                        dev->name);
450                 return NETDEV_TX_BUSY;
451         }
452
453         if (netif_queue_stopped(dev)) {
454                 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
455                        dev->name);
456                 return NETDEV_TX_BUSY;
457         }
458
459         if (orinoco_lock(priv, &flags) != 0) {
460                 printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
461                        dev->name);
462                 return NETDEV_TX_BUSY;
463         }
464
465         if (!netif_carrier_ok(dev) ||
466             (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
467                 /* Oops, the firmware hasn't established a connection,
468                    silently drop the packet (this seems to be the
469                    safest approach). */
470                 goto drop;
471         }
472
473         /* Check packet length */
474         if (skb->len < ETH_HLEN)
475                 goto drop;
476
477         tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;
478
479         err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
480                                        &mic_buf[0]);
481         if (err)
482                 goto drop;
483
484         if (priv->has_alt_txcntl) {
485                 /* WPA enabled firmwares have tx_cntl at the end of
486                  * the 802.11 header.  So write zeroed descriptor and
487                  * 802.11 header at the same time
488                  */
489                 char desc[HERMES_802_3_OFFSET];
490                 __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];
491
492                 memset(&desc, 0, sizeof(desc));
493
494                 *txcntl = cpu_to_le16(tx_control);
495                 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
496                                           txfid, 0);
497                 if (err) {
498                         if (net_ratelimit())
499                                 printk(KERN_ERR "%s: Error %d writing Tx "
500                                        "descriptor to BAP\n", dev->name, err);
501                         goto busy;
502                 }
503         } else {
504                 struct hermes_tx_descriptor desc;
505
506                 memset(&desc, 0, sizeof(desc));
507
508                 desc.tx_control = cpu_to_le16(tx_control);
509                 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
510                                           txfid, 0);
511                 if (err) {
512                         if (net_ratelimit())
513                                 printk(KERN_ERR "%s: Error %d writing Tx "
514                                        "descriptor to BAP\n", dev->name, err);
515                         goto busy;
516                 }
517
518                 /* Clear the 802.11 header and data length fields - some
519                  * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
520                  * if this isn't done. */
521                 hermes_clear_words(hw, HERMES_DATA0,
522                                    HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
523         }
524
525         err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len,
526                                   txfid, HERMES_802_3_OFFSET);
527         if (err) {
528                 printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
529                        dev->name, err);
530                 goto busy;
531         }
532
533         if (tx_control & HERMES_TXCTRL_MIC) {
534                 size_t offset = HERMES_802_3_OFFSET + skb->len;
535                 size_t len = MICHAEL_MIC_LEN;
536
537                 if (offset % 2) {
538                         offset--;
539                         len++;
540                 }
541                 err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
542                                           txfid, offset);
543                 if (err) {
544                         printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
545                                dev->name, err);
546                         goto busy;
547                 }
548         }
549
550         /* Finally, we actually initiate the send */
551         netif_stop_queue(dev);
552
553         err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
554                                 txfid, NULL);
555         if (err) {
556                 netif_start_queue(dev);
557                 if (net_ratelimit())
558                         printk(KERN_ERR "%s: Error %d transmitting packet\n",
559                                 dev->name, err);
560                 goto busy;
561         }
562
563         stats->tx_bytes += HERMES_802_3_OFFSET + skb->len;
564         goto ok;
565
566  drop:
567         stats->tx_errors++;
568         stats->tx_dropped++;
569
570  ok:
571         orinoco_unlock(priv, &flags);
572         dev_kfree_skb(skb);
573         return NETDEV_TX_OK;
574
575  busy:
576         if (err == -EIO)
577                 schedule_work(&priv->reset_work);
578         orinoco_unlock(priv, &flags);
579         return NETDEV_TX_BUSY;
580 }
581
582 static void __orinoco_ev_alloc(struct net_device *dev, hermes_t *hw)
583 {
584         struct orinoco_private *priv = ndev_priv(dev);
585         u16 fid = hermes_read_regn(hw, ALLOCFID);
586
587         if (fid != priv->txfid) {
588                 if (fid != DUMMY_FID)
589                         printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
590                                dev->name, fid);
591                 return;
592         }
593
594         hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
595 }
596
597 static void __orinoco_ev_tx(struct net_device *dev, hermes_t *hw)
598 {
599         struct orinoco_private *priv = ndev_priv(dev);
600         struct net_device_stats *stats = &priv->stats;
601
602         stats->tx_packets++;
603
604         netif_wake_queue(dev);
605
606         hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
607 }
608
609 static void __orinoco_ev_txexc(struct net_device *dev, hermes_t *hw)
610 {
611         struct orinoco_private *priv = ndev_priv(dev);
612         struct net_device_stats *stats = &priv->stats;
613         u16 fid = hermes_read_regn(hw, TXCOMPLFID);
614         u16 status;
615         struct hermes_txexc_data hdr;
616         int err = 0;
617
618         if (fid == DUMMY_FID)
619                 return; /* Nothing's really happened */
620
621         /* Read part of the frame header - we need status and addr1 */
622         err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr,
623                                  sizeof(struct hermes_txexc_data),
624                                  fid, 0);
625
626         hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
627         stats->tx_errors++;
628
629         if (err) {
630                 printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
631                        "(FID=%04X error %d)\n",
632                        dev->name, fid, err);
633                 return;
634         }
635
636         DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
637               err, fid);
638
639         /* We produce a TXDROP event only for retry or lifetime
640          * exceeded, because that's the only status that really mean
641          * that this particular node went away.
642          * Other errors means that *we* screwed up. - Jean II */
643         status = le16_to_cpu(hdr.desc.status);
644         if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
645                 union iwreq_data        wrqu;
646
647                 /* Copy 802.11 dest address.
648                  * We use the 802.11 header because the frame may
649                  * not be 802.3 or may be mangled...
650                  * In Ad-Hoc mode, it will be the node address.
651                  * In managed mode, it will be most likely the AP addr
652                  * User space will figure out how to convert it to
653                  * whatever it needs (IP address or else).
654                  * - Jean II */
655                 memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
656                 wrqu.addr.sa_family = ARPHRD_ETHER;
657
658                 /* Send event to user space */
659                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
660         }
661
662         netif_wake_queue(dev);
663 }
664
665 void orinoco_tx_timeout(struct net_device *dev)
666 {
667         struct orinoco_private *priv = ndev_priv(dev);
668         struct net_device_stats *stats = &priv->stats;
669         struct hermes *hw = &priv->hw;
670
671         printk(KERN_WARNING "%s: Tx timeout! "
672                "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
673                dev->name, hermes_read_regn(hw, ALLOCFID),
674                hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));
675
676         stats->tx_errors++;
677
678         schedule_work(&priv->reset_work);
679 }
680 EXPORT_SYMBOL(orinoco_tx_timeout);
681
682 /********************************************************************/
683 /* Rx path (data frames)                                            */
684 /********************************************************************/
685
686 /* Does the frame have a SNAP header indicating it should be
687  * de-encapsulated to Ethernet-II? */
688 static inline int is_ethersnap(void *_hdr)
689 {
690         u8 *hdr = _hdr;
691
692         /* We de-encapsulate all packets which, a) have SNAP headers
693          * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
694          * and where b) the OUI of the SNAP header is 00:00:00 or
695          * 00:00:f8 - we need both because different APs appear to use
696          * different OUIs for some reason */
697         return (memcmp(hdr, &encaps_hdr, 5) == 0)
698                 && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
699 }
700
701 static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
702                                       int level, int noise)
703 {
704         struct iw_quality wstats;
705         wstats.level = level - 0x95;
706         wstats.noise = noise - 0x95;
707         wstats.qual = (level > noise) ? (level - noise) : 0;
708         wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
709         /* Update spy records */
710         wireless_spy_update(dev, mac, &wstats);
711 }
712
713 static void orinoco_stat_gather(struct net_device *dev,
714                                 struct sk_buff *skb,
715                                 struct hermes_rx_descriptor *desc)
716 {
717         struct orinoco_private *priv = ndev_priv(dev);
718
719         /* Using spy support with lots of Rx packets, like in an
720          * infrastructure (AP), will really slow down everything, because
721          * the MAC address must be compared to each entry of the spy list.
722          * If the user really asks for it (set some address in the
723          * spy list), we do it, but he will pay the price.
724          * Note that to get here, you need both WIRELESS_SPY
725          * compiled in AND some addresses in the list !!!
726          */
727         /* Note : gcc will optimise the whole section away if
728          * WIRELESS_SPY is not defined... - Jean II */
729         if (SPY_NUMBER(priv)) {
730                 orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
731                                    desc->signal, desc->silence);
732         }
733 }
734
735 /*
736  * orinoco_rx_monitor - handle received monitor frames.
737  *
738  * Arguments:
739  *      dev             network device
740  *      rxfid           received FID
741  *      desc            rx descriptor of the frame
742  *
743  * Call context: interrupt
744  */
745 static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
746                                struct hermes_rx_descriptor *desc)
747 {
748         u32 hdrlen = 30;        /* return full header by default */
749         u32 datalen = 0;
750         u16 fc;
751         int err;
752         int len;
753         struct sk_buff *skb;
754         struct orinoco_private *priv = ndev_priv(dev);
755         struct net_device_stats *stats = &priv->stats;
756         hermes_t *hw = &priv->hw;
757
758         len = le16_to_cpu(desc->data_len);
759
760         /* Determine the size of the header and the data */
761         fc = le16_to_cpu(desc->frame_ctl);
762         switch (fc & IEEE80211_FCTL_FTYPE) {
763         case IEEE80211_FTYPE_DATA:
764                 if ((fc & IEEE80211_FCTL_TODS)
765                     && (fc & IEEE80211_FCTL_FROMDS))
766                         hdrlen = 30;
767                 else
768                         hdrlen = 24;
769                 datalen = len;
770                 break;
771         case IEEE80211_FTYPE_MGMT:
772                 hdrlen = 24;
773                 datalen = len;
774                 break;
775         case IEEE80211_FTYPE_CTL:
776                 switch (fc & IEEE80211_FCTL_STYPE) {
777                 case IEEE80211_STYPE_PSPOLL:
778                 case IEEE80211_STYPE_RTS:
779                 case IEEE80211_STYPE_CFEND:
780                 case IEEE80211_STYPE_CFENDACK:
781                         hdrlen = 16;
782                         break;
783                 case IEEE80211_STYPE_CTS:
784                 case IEEE80211_STYPE_ACK:
785                         hdrlen = 10;
786                         break;
787                 }
788                 break;
789         default:
790                 /* Unknown frame type */
791                 break;
792         }
793
794         /* sanity check the length */
795         if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
796                 printk(KERN_DEBUG "%s: oversized monitor frame, "
797                        "data length = %d\n", dev->name, datalen);
798                 stats->rx_length_errors++;
799                 goto update_stats;
800         }
801
802         skb = dev_alloc_skb(hdrlen + datalen);
803         if (!skb) {
804                 printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
805                        dev->name);
806                 goto update_stats;
807         }
808
809         /* Copy the 802.11 header to the skb */
810         memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
811         skb_reset_mac_header(skb);
812
813         /* If any, copy the data from the card to the skb */
814         if (datalen > 0) {
815                 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
816                                          ALIGN(datalen, 2), rxfid,
817                                          HERMES_802_2_OFFSET);
818                 if (err) {
819                         printk(KERN_ERR "%s: error %d reading monitor frame\n",
820                                dev->name, err);
821                         goto drop;
822                 }
823         }
824
825         skb->dev = dev;
826         skb->ip_summed = CHECKSUM_NONE;
827         skb->pkt_type = PACKET_OTHERHOST;
828         skb->protocol = cpu_to_be16(ETH_P_802_2);
829
830         stats->rx_packets++;
831         stats->rx_bytes += skb->len;
832
833         netif_rx(skb);
834         return;
835
836  drop:
837         dev_kfree_skb_irq(skb);
838  update_stats:
839         stats->rx_errors++;
840         stats->rx_dropped++;
841 }
842
843 void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
844 {
845         struct orinoco_private *priv = ndev_priv(dev);
846         struct net_device_stats *stats = &priv->stats;
847         struct iw_statistics *wstats = &priv->wstats;
848         struct sk_buff *skb = NULL;
849         u16 rxfid, status;
850         int length;
851         struct hermes_rx_descriptor *desc;
852         struct orinoco_rx_data *rx_data;
853         int err;
854
855         desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
856         if (!desc) {
857                 printk(KERN_WARNING
858                        "%s: Can't allocate space for RX descriptor\n",
859                        dev->name);
860                 goto update_stats;
861         }
862
863         rxfid = hermes_read_regn(hw, RXFID);
864
865         err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
866                                  rxfid, 0);
867         if (err) {
868                 printk(KERN_ERR "%s: error %d reading Rx descriptor. "
869                        "Frame dropped.\n", dev->name, err);
870                 goto update_stats;
871         }
872
873         status = le16_to_cpu(desc->status);
874
875         if (status & HERMES_RXSTAT_BADCRC) {
876                 DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
877                       dev->name);
878                 stats->rx_crc_errors++;
879                 goto update_stats;
880         }
881
882         /* Handle frames in monitor mode */
883         if (priv->iw_mode == NL80211_IFTYPE_MONITOR) {
884                 orinoco_rx_monitor(dev, rxfid, desc);
885                 goto out;
886         }
887
888         if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
889                 DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
890                       dev->name);
891                 wstats->discard.code++;
892                 goto update_stats;
893         }
894
895         length = le16_to_cpu(desc->data_len);
896
897         /* Sanity checks */
898         if (length < 3) { /* No for even an 802.2 LLC header */
899                 /* At least on Symbol firmware with PCF we get quite a
900                    lot of these legitimately - Poll frames with no
901                    data. */
902                 goto out;
903         }
904         if (length > IEEE80211_MAX_DATA_LEN) {
905                 printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
906                        dev->name, length);
907                 stats->rx_length_errors++;
908                 goto update_stats;
909         }
910
911         /* Payload size does not include Michael MIC. Increase payload
912          * size to read it together with the data. */
913         if (status & HERMES_RXSTAT_MIC)
914                 length += MICHAEL_MIC_LEN;
915
916         /* We need space for the packet data itself, plus an ethernet
917            header, plus 2 bytes so we can align the IP header on a
918            32bit boundary, plus 1 byte so we can read in odd length
919            packets from the card, which has an IO granularity of 16
920            bits */
921         skb = dev_alloc_skb(length+ETH_HLEN+2+1);
922         if (!skb) {
923                 printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
924                        dev->name);
925                 goto update_stats;
926         }
927
928         /* We'll prepend the header, so reserve space for it.  The worst
929            case is no decapsulation, when 802.3 header is prepended and
930            nothing is removed.  2 is for aligning the IP header.  */
931         skb_reserve(skb, ETH_HLEN + 2);
932
933         err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length),
934                                  ALIGN(length, 2), rxfid,
935                                  HERMES_802_2_OFFSET);
936         if (err) {
937                 printk(KERN_ERR "%s: error %d reading frame. "
938                        "Frame dropped.\n", dev->name, err);
939                 goto drop;
940         }
941
942         /* Add desc and skb to rx queue */
943         rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
944         if (!rx_data) {
945                 printk(KERN_WARNING "%s: Can't allocate RX packet\n",
946                         dev->name);
947                 goto drop;
948         }
949         rx_data->desc = desc;
950         rx_data->skb = skb;
951         list_add_tail(&rx_data->list, &priv->rx_list);
952         tasklet_schedule(&priv->rx_tasklet);
953
954         return;
955
956 drop:
957         dev_kfree_skb_irq(skb);
958 update_stats:
959         stats->rx_errors++;
960         stats->rx_dropped++;
961 out:
962         kfree(desc);
963 }
964 EXPORT_SYMBOL(__orinoco_ev_rx);
965
966 static void orinoco_rx(struct net_device *dev,
967                        struct hermes_rx_descriptor *desc,
968                        struct sk_buff *skb)
969 {
970         struct orinoco_private *priv = ndev_priv(dev);
971         struct net_device_stats *stats = &priv->stats;
972         u16 status, fc;
973         int length;
974         struct ethhdr *hdr;
975
976         status = le16_to_cpu(desc->status);
977         length = le16_to_cpu(desc->data_len);
978         fc = le16_to_cpu(desc->frame_ctl);
979
980         /* Calculate and check MIC */
981         if (status & HERMES_RXSTAT_MIC) {
982                 struct orinoco_tkip_key *key;
983                 int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
984                               HERMES_MIC_KEY_ID_SHIFT);
985                 u8 mic[MICHAEL_MIC_LEN];
986                 u8 *rxmic;
987                 u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
988                         desc->addr3 : desc->addr2;
989
990                 /* Extract Michael MIC from payload */
991                 rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;
992
993                 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
994                 length -= MICHAEL_MIC_LEN;
995
996                 key = (struct orinoco_tkip_key *) priv->keys[key_id].key;
997
998                 if (!key) {
999                         printk(KERN_WARNING "%s: Received encrypted frame from "
1000                                "%pM using key %i, but key is not installed\n",
1001                                dev->name, src, key_id);
1002                         goto drop;
1003                 }
1004
1005                 orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src,
1006                             0, /* priority or QoS? */
1007                             skb->data, skb->len, &mic[0]);
1008
1009                 if (memcmp(mic, rxmic,
1010                            MICHAEL_MIC_LEN)) {
1011                         union iwreq_data wrqu;
1012                         struct iw_michaelmicfailure wxmic;
1013
1014                         printk(KERN_WARNING "%s: "
1015                                "Invalid Michael MIC in data frame from %pM, "
1016                                "using key %i\n",
1017                                dev->name, src, key_id);
1018
1019                         /* TODO: update stats */
1020
1021                         /* Notify userspace */
1022                         memset(&wxmic, 0, sizeof(wxmic));
1023                         wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
1024                         wxmic.flags |= (desc->addr1[0] & 1) ?
1025                                 IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
1026                         wxmic.src_addr.sa_family = ARPHRD_ETHER;
1027                         memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);
1028
1029                         (void) orinoco_hw_get_tkip_iv(priv, key_id,
1030                                                       &wxmic.tsc[0]);
1031
1032                         memset(&wrqu, 0, sizeof(wrqu));
1033                         wrqu.data.length = sizeof(wxmic);
1034                         wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
1035                                             (char *) &wxmic);
1036
1037                         goto drop;
1038                 }
1039         }
1040
1041         /* Handle decapsulation
1042          * In most cases, the firmware tell us about SNAP frames.
1043          * For some reason, the SNAP frames sent by LinkSys APs
1044          * are not properly recognised by most firmwares.
1045          * So, check ourselves */
1046         if (length >= ENCAPS_OVERHEAD &&
1047             (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
1048              ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
1049              is_ethersnap(skb->data))) {
1050                 /* These indicate a SNAP within 802.2 LLC within
1051                    802.11 frame which we'll need to de-encapsulate to
1052                    the original EthernetII frame. */
1053                 hdr = (struct ethhdr *)skb_push(skb,
1054                                                 ETH_HLEN - ENCAPS_OVERHEAD);
1055         } else {
1056                 /* 802.3 frame - prepend 802.3 header as is */
1057                 hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
1058                 hdr->h_proto = htons(length);
1059         }
1060         memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
1061         if (fc & IEEE80211_FCTL_FROMDS)
1062                 memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
1063         else
1064                 memcpy(hdr->h_source, desc->addr2, ETH_ALEN);
1065
1066         skb->protocol = eth_type_trans(skb, dev);
1067         skb->ip_summed = CHECKSUM_NONE;
1068         if (fc & IEEE80211_FCTL_TODS)
1069                 skb->pkt_type = PACKET_OTHERHOST;
1070
1071         /* Process the wireless stats if needed */
1072         orinoco_stat_gather(dev, skb, desc);
1073
1074         /* Pass the packet to the networking stack */
1075         netif_rx(skb);
1076         stats->rx_packets++;
1077         stats->rx_bytes += length;
1078
1079         return;
1080
1081  drop:
1082         dev_kfree_skb(skb);
1083         stats->rx_errors++;
1084         stats->rx_dropped++;
1085 }
1086
1087 static void orinoco_rx_isr_tasklet(unsigned long data)
1088 {
1089         struct orinoco_private *priv = (struct orinoco_private *) data;
1090         struct net_device *dev = priv->ndev;
1091         struct orinoco_rx_data *rx_data, *temp;
1092         struct hermes_rx_descriptor *desc;
1093         struct sk_buff *skb;
1094         unsigned long flags;
1095
1096         /* orinoco_rx requires the driver lock, and we also need to
1097          * protect priv->rx_list, so just hold the lock over the
1098          * lot.
1099          *
1100          * If orinoco_lock fails, we've unplugged the card. In this
1101          * case just abort. */
1102         if (orinoco_lock(priv, &flags) != 0)
1103                 return;
1104
1105         /* extract desc and skb from queue */
1106         list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
1107                 desc = rx_data->desc;
1108                 skb = rx_data->skb;
1109                 list_del(&rx_data->list);
1110                 kfree(rx_data);
1111
1112                 orinoco_rx(dev, desc, skb);
1113
1114                 kfree(desc);
1115         }
1116
1117         orinoco_unlock(priv, &flags);
1118 }
1119
1120 /********************************************************************/
1121 /* Rx path (info frames)                                            */
1122 /********************************************************************/
1123
1124 static void print_linkstatus(struct net_device *dev, u16 status)
1125 {
1126         char *s;
1127
1128         if (suppress_linkstatus)
1129                 return;
1130
1131         switch (status) {
1132         case HERMES_LINKSTATUS_NOT_CONNECTED:
1133                 s = "Not Connected";
1134                 break;
1135         case HERMES_LINKSTATUS_CONNECTED:
1136                 s = "Connected";
1137                 break;
1138         case HERMES_LINKSTATUS_DISCONNECTED:
1139                 s = "Disconnected";
1140                 break;
1141         case HERMES_LINKSTATUS_AP_CHANGE:
1142                 s = "AP Changed";
1143                 break;
1144         case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
1145                 s = "AP Out of Range";
1146                 break;
1147         case HERMES_LINKSTATUS_AP_IN_RANGE:
1148                 s = "AP In Range";
1149                 break;
1150         case HERMES_LINKSTATUS_ASSOC_FAILED:
1151                 s = "Association Failed";
1152                 break;
1153         default:
1154                 s = "UNKNOWN";
1155         }
1156
1157         printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
1158                dev->name, s, status);
1159 }
1160
1161 /* Search scan results for requested BSSID, join it if found */
1162 static void orinoco_join_ap(struct work_struct *work)
1163 {
1164         struct orinoco_private *priv =
1165                 container_of(work, struct orinoco_private, join_work);
1166         struct net_device *dev = priv->ndev;
1167         struct hermes *hw = &priv->hw;
1168         int err;
1169         unsigned long flags;
1170         struct join_req {
1171                 u8 bssid[ETH_ALEN];
1172                 __le16 channel;
1173         } __packed req;
1174         const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
1175         struct prism2_scan_apinfo *atom = NULL;
1176         int offset = 4;
1177         int found = 0;
1178         u8 *buf;
1179         u16 len;
1180
1181         /* Allocate buffer for scan results */
1182         buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
1183         if (!buf)
1184                 return;
1185
1186         if (orinoco_lock(priv, &flags) != 0)
1187                 goto fail_lock;
1188
1189         /* Sanity checks in case user changed something in the meantime */
1190         if (!priv->bssid_fixed)
1191                 goto out;
1192
1193         if (strlen(priv->desired_essid) == 0)
1194                 goto out;
1195
1196         /* Read scan results from the firmware */
1197         err = hw->ops->read_ltv(hw, USER_BAP,
1198                                 HERMES_RID_SCANRESULTSTABLE,
1199                                 MAX_SCAN_LEN, &len, buf);
1200         if (err) {
1201                 printk(KERN_ERR "%s: Cannot read scan results\n",
1202                        dev->name);
1203                 goto out;
1204         }
1205
1206         len = HERMES_RECLEN_TO_BYTES(len);
1207
1208         /* Go through the scan results looking for the channel of the AP
1209          * we were requested to join */
1210         for (; offset + atom_len <= len; offset += atom_len) {
1211                 atom = (struct prism2_scan_apinfo *) (buf + offset);
1212                 if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
1213                         found = 1;
1214                         break;
1215                 }
1216         }
1217
1218         if (!found) {
1219                 DEBUG(1, "%s: Requested AP not found in scan results\n",
1220                       dev->name);
1221                 goto out;
1222         }
1223
1224         memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
1225         req.channel = atom->channel;    /* both are little-endian */
1226         err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
1227                                   &req);
1228         if (err)
1229                 printk(KERN_ERR "%s: Error issuing join request\n", dev->name);
1230
1231  out:
1232         orinoco_unlock(priv, &flags);
1233
1234  fail_lock:
1235         kfree(buf);
1236 }
1237
1238 /* Send new BSSID to userspace */
1239 static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
1240 {
1241         struct net_device *dev = priv->ndev;
1242         struct hermes *hw = &priv->hw;
1243         union iwreq_data wrqu;
1244         int err;
1245
1246         err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
1247                                 ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
1248         if (err != 0)
1249                 return;
1250
1251         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1252
1253         /* Send event to user space */
1254         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1255 }
1256
1257 static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
1258 {
1259         struct net_device *dev = priv->ndev;
1260         struct hermes *hw = &priv->hw;
1261         union iwreq_data wrqu;
1262         int err;
1263         u8 buf[88];
1264         u8 *ie;
1265
1266         if (!priv->has_wpa)
1267                 return;
1268
1269         err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
1270                                 sizeof(buf), NULL, &buf);
1271         if (err != 0)
1272                 return;
1273
1274         ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1275         if (ie) {
1276                 int rem = sizeof(buf) - (ie - &buf[0]);
1277                 wrqu.data.length = ie[1] + 2;
1278                 if (wrqu.data.length > rem)
1279                         wrqu.data.length = rem;
1280
1281                 if (wrqu.data.length)
1282                         /* Send event to user space */
1283                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
1284         }
1285 }
1286
1287 static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
1288 {
1289         struct net_device *dev = priv->ndev;
1290         struct hermes *hw = &priv->hw;
1291         union iwreq_data wrqu;
1292         int err;
1293         u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
1294         u8 *ie;
1295
1296         if (!priv->has_wpa)
1297                 return;
1298
1299         err = hw->ops->read_ltv(hw, USER_BAP,
1300                                 HERMES_RID_CURRENT_ASSOC_RESP_INFO,
1301                                 sizeof(buf), NULL, &buf);
1302         if (err != 0)
1303                 return;
1304
1305         ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1306         if (ie) {
1307                 int rem = sizeof(buf) - (ie - &buf[0]);
1308                 wrqu.data.length = ie[1] + 2;
1309                 if (wrqu.data.length > rem)
1310                         wrqu.data.length = rem;
1311
1312                 if (wrqu.data.length)
1313                         /* Send event to user space */
1314                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
1315         }
1316 }
1317
1318 static void orinoco_send_wevents(struct work_struct *work)
1319 {
1320         struct orinoco_private *priv =
1321                 container_of(work, struct orinoco_private, wevent_work);
1322         unsigned long flags;
1323
1324         if (orinoco_lock(priv, &flags) != 0)
1325                 return;
1326
1327         orinoco_send_assocreqie_wevent(priv);
1328         orinoco_send_assocrespie_wevent(priv);
1329         orinoco_send_bssid_wevent(priv);
1330
1331         orinoco_unlock(priv, &flags);
1332 }
1333
1334 static void qbuf_scan(struct orinoco_private *priv, void *buf,
1335                       int len, int type)
1336 {
1337         struct orinoco_scan_data *sd;
1338         unsigned long flags;
1339
1340         sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1341         sd->buf = buf;
1342         sd->len = len;
1343         sd->type = type;
1344
1345         spin_lock_irqsave(&priv->scan_lock, flags);
1346         list_add_tail(&sd->list, &priv->scan_list);
1347         spin_unlock_irqrestore(&priv->scan_lock, flags);
1348
1349         schedule_work(&priv->process_scan);
1350 }
1351
1352 static void qabort_scan(struct orinoco_private *priv)
1353 {
1354         struct orinoco_scan_data *sd;
1355         unsigned long flags;
1356
1357         sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1358         sd->len = -1; /* Abort */
1359
1360         spin_lock_irqsave(&priv->scan_lock, flags);
1361         list_add_tail(&sd->list, &priv->scan_list);
1362         spin_unlock_irqrestore(&priv->scan_lock, flags);
1363
1364         schedule_work(&priv->process_scan);
1365 }
1366
1367 static void orinoco_process_scan_results(struct work_struct *work)
1368 {
1369         struct orinoco_private *priv =
1370                 container_of(work, struct orinoco_private, process_scan);
1371         struct orinoco_scan_data *sd, *temp;
1372         unsigned long flags;
1373         void *buf;
1374         int len;
1375         int type;
1376
1377         spin_lock_irqsave(&priv->scan_lock, flags);
1378         list_for_each_entry_safe(sd, temp, &priv->scan_list, list) {
1379                 spin_unlock_irqrestore(&priv->scan_lock, flags);
1380
1381                 buf = sd->buf;
1382                 len = sd->len;
1383                 type = sd->type;
1384
1385                 list_del(&sd->list);
1386                 kfree(sd);
1387
1388                 if (len > 0) {
1389                         if (type == HERMES_INQ_CHANNELINFO)
1390                                 orinoco_add_extscan_result(priv, buf, len);
1391                         else
1392                                 orinoco_add_hostscan_results(priv, buf, len);
1393
1394                         kfree(buf);
1395                 } else {
1396                         /* Either abort or complete the scan */
1397                         orinoco_scan_done(priv, (len < 0));
1398                 }
1399
1400                 spin_lock_irqsave(&priv->scan_lock, flags);
1401         }
1402         spin_unlock_irqrestore(&priv->scan_lock, flags);
1403 }
1404
1405 void __orinoco_ev_info(struct net_device *dev, hermes_t *hw)
1406 {
1407         struct orinoco_private *priv = ndev_priv(dev);
1408         u16 infofid;
1409         struct {
1410                 __le16 len;
1411                 __le16 type;
1412         } __packed info;
1413         int len, type;
1414         int err;
1415
1416         /* This is an answer to an INQUIRE command that we did earlier,
1417          * or an information "event" generated by the card
1418          * The controller return to us a pseudo frame containing
1419          * the information in question - Jean II */
1420         infofid = hermes_read_regn(hw, INFOFID);
1421
1422         /* Read the info frame header - don't try too hard */
1423         err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info),
1424                                  infofid, 0);
1425         if (err) {
1426                 printk(KERN_ERR "%s: error %d reading info frame. "
1427                        "Frame dropped.\n", dev->name, err);
1428                 return;
1429         }
1430
1431         len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
1432         type = le16_to_cpu(info.type);
1433
1434         switch (type) {
1435         case HERMES_INQ_TALLIES: {
1436                 struct hermes_tallies_frame tallies;
1437                 struct iw_statistics *wstats = &priv->wstats;
1438
1439                 if (len > sizeof(tallies)) {
1440                         printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
1441                                dev->name, len);
1442                         len = sizeof(tallies);
1443                 }
1444
1445                 err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len,
1446                                          infofid, sizeof(info));
1447                 if (err)
1448                         break;
1449
1450                 /* Increment our various counters */
1451                 /* wstats->discard.nwid - no wrong BSSID stuff */
1452                 wstats->discard.code +=
1453                         le16_to_cpu(tallies.RxWEPUndecryptable);
1454                 if (len == sizeof(tallies))
1455                         wstats->discard.code +=
1456                                 le16_to_cpu(tallies.RxDiscards_WEPICVError) +
1457                                 le16_to_cpu(tallies.RxDiscards_WEPExcluded);
1458                 wstats->discard.misc +=
1459                         le16_to_cpu(tallies.TxDiscardsWrongSA);
1460                 wstats->discard.fragment +=
1461                         le16_to_cpu(tallies.RxMsgInBadMsgFragments);
1462                 wstats->discard.retries +=
1463                         le16_to_cpu(tallies.TxRetryLimitExceeded);
1464                 /* wstats->miss.beacon - no match */
1465         }
1466         break;
1467         case HERMES_INQ_LINKSTATUS: {
1468                 struct hermes_linkstatus linkstatus;
1469                 u16 newstatus;
1470                 int connected;
1471
1472                 if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
1473                         break;
1474
1475                 if (len != sizeof(linkstatus)) {
1476                         printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
1477                                dev->name, len);
1478                         break;
1479                 }
1480
1481                 err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len,
1482                                          infofid, sizeof(info));
1483                 if (err)
1484                         break;
1485                 newstatus = le16_to_cpu(linkstatus.linkstatus);
1486
1487                 /* Symbol firmware uses "out of range" to signal that
1488                  * the hostscan frame can be requested.  */
1489                 if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
1490                     priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
1491                     priv->has_hostscan && priv->scan_request) {
1492                         hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
1493                         break;
1494                 }
1495
1496                 connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
1497                         || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
1498                         || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);
1499
1500                 if (connected)
1501                         netif_carrier_on(dev);
1502                 else if (!ignore_disconnect)
1503                         netif_carrier_off(dev);
1504
1505                 if (newstatus != priv->last_linkstatus) {
1506                         priv->last_linkstatus = newstatus;
1507                         print_linkstatus(dev, newstatus);
1508                         /* The info frame contains only one word which is the
1509                          * status (see hermes.h). The status is pretty boring
1510                          * in itself, that's why we export the new BSSID...
1511                          * Jean II */
1512                         schedule_work(&priv->wevent_work);
1513                 }
1514         }
1515         break;
1516         case HERMES_INQ_SCAN:
1517                 if (!priv->scan_request && priv->bssid_fixed &&
1518                     priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
1519                         schedule_work(&priv->join_work);
1520                         break;
1521                 }
1522                 /* fall through */
1523         case HERMES_INQ_HOSTSCAN:
1524         case HERMES_INQ_HOSTSCAN_SYMBOL: {
1525                 /* Result of a scanning. Contains information about
1526                  * cells in the vicinity - Jean II */
1527                 unsigned char *buf;
1528
1529                 /* Sanity check */
1530                 if (len > 4096) {
1531                         printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
1532                                dev->name, len);
1533                         qabort_scan(priv);
1534                         break;
1535                 }
1536
1537                 /* Allocate buffer for results */
1538                 buf = kmalloc(len, GFP_ATOMIC);
1539                 if (buf == NULL) {
1540                         /* No memory, so can't printk()... */
1541                         qabort_scan(priv);
1542                         break;
1543                 }
1544
1545                 /* Read scan data */
1546                 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len,
1547                                          infofid, sizeof(info));
1548                 if (err) {
1549                         kfree(buf);
1550                         qabort_scan(priv);
1551                         break;
1552                 }
1553
1554 #ifdef ORINOCO_DEBUG
1555                 {
1556                         int     i;
1557                         printk(KERN_DEBUG "Scan result [%02X", buf[0]);
1558                         for (i = 1; i < (len * 2); i++)
1559                                 printk(":%02X", buf[i]);
1560                         printk("]\n");
1561                 }
1562 #endif  /* ORINOCO_DEBUG */
1563
1564                 qbuf_scan(priv, buf, len, type);
1565         }
1566         break;
1567         case HERMES_INQ_CHANNELINFO:
1568         {
1569                 struct agere_ext_scan_info *bss;
1570
1571                 if (!priv->scan_request) {
1572                         printk(KERN_DEBUG "%s: Got chaninfo without scan, "
1573                                "len=%d\n", dev->name, len);
1574                         break;
1575                 }
1576
1577                 /* An empty result indicates that the scan is complete */
1578                 if (len == 0) {
1579                         qbuf_scan(priv, NULL, len, type);
1580                         break;
1581                 }
1582
1583                 /* Sanity check */
1584                 else if (len < (offsetof(struct agere_ext_scan_info,
1585                                            data) + 2)) {
1586                         /* Drop this result now so we don't have to
1587                          * keep checking later */
1588                         printk(KERN_WARNING
1589                                "%s: Ext scan results too short (%d bytes)\n",
1590                                dev->name, len);
1591                         break;
1592                 }
1593
1594                 bss = kmalloc(len, GFP_ATOMIC);
1595                 if (bss == NULL)
1596                         break;
1597
1598                 /* Read scan data */
1599                 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len,
1600                                          infofid, sizeof(info));
1601                 if (err)
1602                         kfree(bss);
1603                 else
1604                         qbuf_scan(priv, bss, len, type);
1605
1606                 break;
1607         }
1608         case HERMES_INQ_SEC_STAT_AGERE:
1609                 /* Security status (Agere specific) */
1610                 /* Ignore this frame for now */
1611                 if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
1612                         break;
1613                 /* fall through */
1614         default:
1615                 printk(KERN_DEBUG "%s: Unknown information frame received: "
1616                        "type 0x%04x, length %d\n", dev->name, type, len);
1617                 /* We don't actually do anything about it */
1618                 break;
1619         }
1620 }
1621 EXPORT_SYMBOL(__orinoco_ev_info);
1622
1623 static void __orinoco_ev_infdrop(struct net_device *dev, hermes_t *hw)
1624 {
1625         if (net_ratelimit())
1626                 printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
1627 }
1628
1629 /********************************************************************/
1630 /* Internal hardware control routines                               */
1631 /********************************************************************/
1632
1633 static int __orinoco_up(struct orinoco_private *priv)
1634 {
1635         struct net_device *dev = priv->ndev;
1636         struct hermes *hw = &priv->hw;
1637         int err;
1638
1639         netif_carrier_off(dev); /* just to make sure */
1640
1641         err = __orinoco_commit(priv);
1642         if (err) {
1643                 printk(KERN_ERR "%s: Error %d configuring card\n",
1644                        dev->name, err);
1645                 return err;
1646         }
1647
1648         /* Fire things up again */
1649         hermes_set_irqmask(hw, ORINOCO_INTEN);
1650         err = hermes_enable_port(hw, 0);
1651         if (err) {
1652                 printk(KERN_ERR "%s: Error %d enabling MAC port\n",
1653                        dev->name, err);
1654                 return err;
1655         }
1656
1657         netif_start_queue(dev);
1658
1659         return 0;
1660 }
1661
1662 static int __orinoco_down(struct orinoco_private *priv)
1663 {
1664         struct net_device *dev = priv->ndev;
1665         struct hermes *hw = &priv->hw;
1666         int err;
1667
1668         netif_stop_queue(dev);
1669
1670         if (!priv->hw_unavailable) {
1671                 if (!priv->broken_disableport) {
1672                         err = hermes_disable_port(hw, 0);
1673                         if (err) {
1674                                 /* Some firmwares (e.g. Intersil 1.3.x) seem
1675                                  * to have problems disabling the port, oh
1676                                  * well, too bad. */
1677                                 printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
1678                                        dev->name, err);
1679                                 priv->broken_disableport = 1;
1680                         }
1681                 }
1682                 hermes_set_irqmask(hw, 0);
1683                 hermes_write_regn(hw, EVACK, 0xffff);
1684         }
1685
1686         orinoco_scan_done(priv, true);
1687
1688         /* firmware will have to reassociate */
1689         netif_carrier_off(dev);
1690         priv->last_linkstatus = 0xffff;
1691
1692         return 0;
1693 }
1694
1695 static int orinoco_reinit_firmware(struct orinoco_private *priv)
1696 {
1697         struct hermes *hw = &priv->hw;
1698         int err;
1699
1700         err = hw->ops->init(hw);
1701         if (priv->do_fw_download && !err) {
1702                 err = orinoco_download(priv);
1703                 if (err)
1704                         priv->do_fw_download = 0;
1705         }
1706         if (!err)
1707                 err = orinoco_hw_allocate_fid(priv);
1708
1709         return err;
1710 }
1711
1712 static int
1713 __orinoco_set_multicast_list(struct net_device *dev)
1714 {
1715         struct orinoco_private *priv = ndev_priv(dev);
1716         int err = 0;
1717         int promisc, mc_count;
1718
1719         /* The Hermes doesn't seem to have an allmulti mode, so we go
1720          * into promiscuous mode and let the upper levels deal. */
1721         if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
1722             (netdev_mc_count(dev) > MAX_MULTICAST(priv))) {
1723                 promisc = 1;
1724                 mc_count = 0;
1725         } else {
1726                 promisc = 0;
1727                 mc_count = netdev_mc_count(dev);
1728         }
1729
1730         err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc);
1731
1732         return err;
1733 }
1734
1735 /* This must be called from user context, without locks held - use
1736  * schedule_work() */
1737 void orinoco_reset(struct work_struct *work)
1738 {
1739         struct orinoco_private *priv =
1740                 container_of(work, struct orinoco_private, reset_work);
1741         struct net_device *dev = priv->ndev;
1742         struct hermes *hw = &priv->hw;
1743         int err;
1744         unsigned long flags;
1745
1746         if (orinoco_lock(priv, &flags) != 0)
1747                 /* When the hardware becomes available again, whatever
1748                  * detects that is responsible for re-initializing
1749                  * it. So no need for anything further */
1750                 return;
1751
1752         netif_stop_queue(dev);
1753
1754         /* Shut off interrupts.  Depending on what state the hardware
1755          * is in, this might not work, but we'll try anyway */
1756         hermes_set_irqmask(hw, 0);
1757         hermes_write_regn(hw, EVACK, 0xffff);
1758
1759         priv->hw_unavailable++;
1760         priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
1761         netif_carrier_off(dev);
1762
1763         orinoco_unlock(priv, &flags);
1764
1765         /* Scanning support: Notify scan cancellation */
1766         orinoco_scan_done(priv, true);
1767
1768         if (priv->hard_reset) {
1769                 err = (*priv->hard_reset)(priv);
1770                 if (err) {
1771                         printk(KERN_ERR "%s: orinoco_reset: Error %d "
1772                                "performing hard reset\n", dev->name, err);
1773                         goto disable;
1774                 }
1775         }
1776
1777         err = orinoco_reinit_firmware(priv);
1778         if (err) {
1779                 printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
1780                        dev->name, err);
1781                 goto disable;
1782         }
1783
1784         /* This has to be called from user context */
1785         orinoco_lock_irq(priv);
1786
1787         priv->hw_unavailable--;
1788
1789         /* priv->open or priv->hw_unavailable might have changed while
1790          * we dropped the lock */
1791         if (priv->open && (!priv->hw_unavailable)) {
1792                 err = __orinoco_up(priv);
1793                 if (err) {
1794                         printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
1795                                dev->name, err);
1796                 } else
1797                         dev->trans_start = jiffies;
1798         }
1799
1800         orinoco_unlock_irq(priv);
1801
1802         return;
1803  disable:
1804         hermes_set_irqmask(hw, 0);
1805         netif_device_detach(dev);
1806         printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
1807 }
1808
1809 static int __orinoco_commit(struct orinoco_private *priv)
1810 {
1811         struct net_device *dev = priv->ndev;
1812         int err = 0;
1813
1814         err = orinoco_hw_program_rids(priv);
1815
1816         /* FIXME: what about netif_tx_lock */
1817         (void) __orinoco_set_multicast_list(dev);
1818
1819         return err;
1820 }
1821
1822 /* Ensures configuration changes are applied. May result in a reset.
1823  * The caller should hold priv->lock
1824  */
1825 int orinoco_commit(struct orinoco_private *priv)
1826 {
1827         struct net_device *dev = priv->ndev;
1828         hermes_t *hw = &priv->hw;
1829         int err;
1830
1831         if (priv->broken_disableport) {
1832                 schedule_work(&priv->reset_work);
1833                 return 0;
1834         }
1835
1836         err = hermes_disable_port(hw, 0);
1837         if (err) {
1838                 printk(KERN_WARNING "%s: Unable to disable port "
1839                        "while reconfiguring card\n", dev->name);
1840                 priv->broken_disableport = 1;
1841                 goto out;
1842         }
1843
1844         err = __orinoco_commit(priv);
1845         if (err) {
1846                 printk(KERN_WARNING "%s: Unable to reconfigure card\n",
1847                        dev->name);
1848                 goto out;
1849         }
1850
1851         err = hermes_enable_port(hw, 0);
1852         if (err) {
1853                 printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
1854                        dev->name);
1855                 goto out;
1856         }
1857
1858  out:
1859         if (err) {
1860                 printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
1861                 schedule_work(&priv->reset_work);
1862                 err = 0;
1863         }
1864         return err;
1865 }
1866
1867 /********************************************************************/
1868 /* Interrupt handler                                                */
1869 /********************************************************************/
1870
1871 static void __orinoco_ev_tick(struct net_device *dev, hermes_t *hw)
1872 {
1873         printk(KERN_DEBUG "%s: TICK\n", dev->name);
1874 }
1875
1876 static void __orinoco_ev_wterr(struct net_device *dev, hermes_t *hw)
1877 {
1878         /* This seems to happen a fair bit under load, but ignoring it
1879            seems to work fine...*/
1880         printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
1881                dev->name);
1882 }
1883
1884 irqreturn_t orinoco_interrupt(int irq, void *dev_id)
1885 {
1886         struct orinoco_private *priv = dev_id;
1887         struct net_device *dev = priv->ndev;
1888         hermes_t *hw = &priv->hw;
1889         int count = MAX_IRQLOOPS_PER_IRQ;
1890         u16 evstat, events;
1891         /* These are used to detect a runaway interrupt situation.
1892          *
1893          * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
1894          * we panic and shut down the hardware
1895          */
1896         /* jiffies value the last time we were called */
1897         static int last_irq_jiffy; /* = 0 */
1898         static int loops_this_jiffy; /* = 0 */
1899         unsigned long flags;
1900
1901         if (orinoco_lock(priv, &flags) != 0) {
1902                 /* If hw is unavailable - we don't know if the irq was
1903                  * for us or not */
1904                 return IRQ_HANDLED;
1905         }
1906
1907         evstat = hermes_read_regn(hw, EVSTAT);
1908         events = evstat & hw->inten;
1909         if (!events) {
1910                 orinoco_unlock(priv, &flags);
1911                 return IRQ_NONE;
1912         }
1913
1914         if (jiffies != last_irq_jiffy)
1915                 loops_this_jiffy = 0;
1916         last_irq_jiffy = jiffies;
1917
1918         while (events && count--) {
1919                 if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
1920                         printk(KERN_WARNING "%s: IRQ handler is looping too "
1921                                "much! Resetting.\n", dev->name);
1922                         /* Disable interrupts for now */
1923                         hermes_set_irqmask(hw, 0);
1924                         schedule_work(&priv->reset_work);
1925                         break;
1926                 }
1927
1928                 /* Check the card hasn't been removed */
1929                 if (!hermes_present(hw)) {
1930                         DEBUG(0, "orinoco_interrupt(): card removed\n");
1931                         break;
1932                 }
1933
1934                 if (events & HERMES_EV_TICK)
1935                         __orinoco_ev_tick(dev, hw);
1936                 if (events & HERMES_EV_WTERR)
1937                         __orinoco_ev_wterr(dev, hw);
1938                 if (events & HERMES_EV_INFDROP)
1939                         __orinoco_ev_infdrop(dev, hw);
1940                 if (events & HERMES_EV_INFO)
1941                         __orinoco_ev_info(dev, hw);
1942                 if (events & HERMES_EV_RX)
1943                         __orinoco_ev_rx(dev, hw);
1944                 if (events & HERMES_EV_TXEXC)
1945                         __orinoco_ev_txexc(dev, hw);
1946                 if (events & HERMES_EV_TX)
1947                         __orinoco_ev_tx(dev, hw);
1948                 if (events & HERMES_EV_ALLOC)
1949                         __orinoco_ev_alloc(dev, hw);
1950
1951                 hermes_write_regn(hw, EVACK, evstat);
1952
1953                 evstat = hermes_read_regn(hw, EVSTAT);
1954                 events = evstat & hw->inten;
1955         };
1956
1957         orinoco_unlock(priv, &flags);
1958         return IRQ_HANDLED;
1959 }
1960 EXPORT_SYMBOL(orinoco_interrupt);
1961
1962 /********************************************************************/
1963 /* Power management                                                 */
1964 /********************************************************************/
1965 #if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
1966 static int orinoco_pm_notifier(struct notifier_block *notifier,
1967                                unsigned long pm_event,
1968                                void *unused)
1969 {
1970         struct orinoco_private *priv = container_of(notifier,
1971                                                     struct orinoco_private,
1972                                                     pm_notifier);
1973
1974         /* All we need to do is cache the firmware before suspend, and
1975          * release it when we come out.
1976          *
1977          * Only need to do this if we're downloading firmware. */
1978         if (!priv->do_fw_download)
1979                 return NOTIFY_DONE;
1980
1981         switch (pm_event) {
1982         case PM_HIBERNATION_PREPARE:
1983         case PM_SUSPEND_PREPARE:
1984                 orinoco_cache_fw(priv, 0);
1985                 break;
1986
1987         case PM_POST_RESTORE:
1988                 /* Restore from hibernation failed. We need to clean
1989                  * up in exactly the same way, so fall through. */
1990         case PM_POST_HIBERNATION:
1991         case PM_POST_SUSPEND:
1992                 orinoco_uncache_fw(priv);
1993                 break;
1994
1995         case PM_RESTORE_PREPARE:
1996         default:
1997                 break;
1998         }
1999
2000         return NOTIFY_DONE;
2001 }
2002
2003 static void orinoco_register_pm_notifier(struct orinoco_private *priv)
2004 {
2005         priv->pm_notifier.notifier_call = orinoco_pm_notifier;
2006         register_pm_notifier(&priv->pm_notifier);
2007 }
2008
2009 static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
2010 {
2011         unregister_pm_notifier(&priv->pm_notifier);
2012 }
2013 #else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
2014 #define orinoco_register_pm_notifier(priv) do { } while(0)
2015 #define orinoco_unregister_pm_notifier(priv) do { } while(0)
2016 #endif
2017
2018 /********************************************************************/
2019 /* Initialization                                                   */
2020 /********************************************************************/
2021
2022 int orinoco_init(struct orinoco_private *priv)
2023 {
2024         struct device *dev = priv->dev;
2025         struct wiphy *wiphy = priv_to_wiphy(priv);
2026         hermes_t *hw = &priv->hw;
2027         int err = 0;
2028
2029         /* No need to lock, the hw_unavailable flag is already set in
2030          * alloc_orinocodev() */
2031         priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;
2032
2033         /* Initialize the firmware */
2034         err = hw->ops->init(hw);
2035         if (err != 0) {
2036                 dev_err(dev, "Failed to initialize firmware (err = %d)\n",
2037                         err);
2038                 goto out;
2039         }
2040
2041         err = determine_fw_capabilities(priv, wiphy->fw_version,
2042                                         sizeof(wiphy->fw_version),
2043                                         &wiphy->hw_version);
2044         if (err != 0) {
2045                 dev_err(dev, "Incompatible firmware, aborting\n");
2046                 goto out;
2047         }
2048
2049         if (priv->do_fw_download) {
2050 #ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
2051                 orinoco_cache_fw(priv, 0);
2052 #endif
2053
2054                 err = orinoco_download(priv);
2055                 if (err)
2056                         priv->do_fw_download = 0;
2057
2058                 /* Check firmware version again */
2059                 err = determine_fw_capabilities(priv, wiphy->fw_version,
2060                                                 sizeof(wiphy->fw_version),
2061                                                 &wiphy->hw_version);
2062                 if (err != 0) {
2063                         dev_err(dev, "Incompatible firmware, aborting\n");
2064                         goto out;
2065                 }
2066         }
2067
2068         if (priv->has_port3)
2069                 dev_info(dev, "Ad-hoc demo mode supported\n");
2070         if (priv->has_ibss)
2071                 dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n");
2072         if (priv->has_wep)
2073                 dev_info(dev, "WEP supported, %s-bit key\n",
2074                          priv->has_big_wep ? "104" : "40");
2075         if (priv->has_wpa) {
2076                 dev_info(dev, "WPA-PSK supported\n");
2077                 if (orinoco_mic_init(priv)) {
2078                         dev_err(dev, "Failed to setup MIC crypto algorithm. "
2079                                 "Disabling WPA support\n");
2080                         priv->has_wpa = 0;
2081                 }
2082         }
2083
2084         err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr);
2085         if (err)
2086                 goto out;
2087
2088         err = orinoco_hw_allocate_fid(priv);
2089         if (err) {
2090                 dev_err(dev, "Failed to allocate NIC buffer!\n");
2091                 goto out;
2092         }
2093
2094         /* Set up the default configuration */
2095         priv->iw_mode = NL80211_IFTYPE_STATION;
2096         /* By default use IEEE/IBSS ad-hoc mode if we have it */
2097         priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
2098         set_port_type(priv);
2099         priv->channel = 0; /* use firmware default */
2100
2101         priv->promiscuous = 0;
2102         priv->encode_alg = ORINOCO_ALG_NONE;
2103         priv->tx_key = 0;
2104         priv->wpa_enabled = 0;
2105         priv->tkip_cm_active = 0;
2106         priv->key_mgmt = 0;
2107         priv->wpa_ie_len = 0;
2108         priv->wpa_ie = NULL;
2109
2110         if (orinoco_wiphy_register(wiphy)) {
2111                 err = -ENODEV;
2112                 goto out;
2113         }
2114
2115         /* Make the hardware available, as long as it hasn't been
2116          * removed elsewhere (e.g. by PCMCIA hot unplug) */
2117         orinoco_lock_irq(priv);
2118         priv->hw_unavailable--;
2119         orinoco_unlock_irq(priv);
2120
2121         dev_dbg(dev, "Ready\n");
2122
2123  out:
2124         return err;
2125 }
2126 EXPORT_SYMBOL(orinoco_init);
2127
2128 static const struct net_device_ops orinoco_netdev_ops = {
2129         .ndo_open               = orinoco_open,
2130         .ndo_stop               = orinoco_stop,
2131         .ndo_start_xmit         = orinoco_xmit,
2132         .ndo_set_multicast_list = orinoco_set_multicast_list,
2133         .ndo_change_mtu         = orinoco_change_mtu,
2134         .ndo_set_mac_address    = eth_mac_addr,
2135         .ndo_validate_addr      = eth_validate_addr,
2136         .ndo_tx_timeout         = orinoco_tx_timeout,
2137         .ndo_get_stats          = orinoco_get_stats,
2138 };
2139
2140 /* Allocate private data.
2141  *
2142  * This driver has a number of structures associated with it
2143  *  netdev - Net device structure for each network interface
2144  *  wiphy - structure associated with wireless phy
2145  *  wireless_dev (wdev) - structure for each wireless interface
2146  *  hw - structure for hermes chip info
2147  *  card - card specific structure for use by the card driver
2148  *         (airport, orinoco_cs)
2149  *  priv - orinoco private data
2150  *  device - generic linux device structure
2151  *
2152  *  +---------+    +---------+
2153  *  |  wiphy  |    | netdev  |
2154  *  | +-------+    | +-------+
2155  *  | | priv  |    | | wdev  |
2156  *  | | +-----+    +-+-------+
2157  *  | | | hw  |
2158  *  | +-+-----+
2159  *  | | card  |
2160  *  +-+-------+
2161  *
2162  * priv has a link to netdev and device
2163  * wdev has a link to wiphy
2164  */
2165 struct orinoco_private
2166 *alloc_orinocodev(int sizeof_card,
2167                   struct device *device,
2168                   int (*hard_reset)(struct orinoco_private *),
2169                   int (*stop_fw)(struct orinoco_private *, int))
2170 {
2171         struct orinoco_private *priv;
2172         struct wiphy *wiphy;
2173
2174         /* allocate wiphy
2175          * NOTE: We only support a single virtual interface
2176          *       but this may change when monitor mode is added
2177          */
2178         wiphy = wiphy_new(&orinoco_cfg_ops,
2179                           sizeof(struct orinoco_private) + sizeof_card);
2180         if (!wiphy)
2181                 return NULL;
2182
2183         priv = wiphy_priv(wiphy);
2184         priv->dev = device;
2185
2186         if (sizeof_card)
2187                 priv->card = (void *)((unsigned long)priv
2188                                       + sizeof(struct orinoco_private));
2189         else
2190                 priv->card = NULL;
2191
2192         orinoco_wiphy_init(wiphy);
2193
2194 #ifdef WIRELESS_SPY
2195         priv->wireless_data.spy_data = &priv->spy_data;
2196 #endif
2197
2198         /* Set up default callbacks */
2199         priv->hard_reset = hard_reset;
2200         priv->stop_fw = stop_fw;
2201
2202         spin_lock_init(&priv->lock);
2203         priv->open = 0;
2204         priv->hw_unavailable = 1; /* orinoco_init() must clear this
2205                                    * before anything else touches the
2206                                    * hardware */
2207         INIT_WORK(&priv->reset_work, orinoco_reset);
2208         INIT_WORK(&priv->join_work, orinoco_join_ap);
2209         INIT_WORK(&priv->wevent_work, orinoco_send_wevents);
2210
2211         INIT_LIST_HEAD(&priv->rx_list);
2212         tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet,
2213                      (unsigned long) priv);
2214
2215         spin_lock_init(&priv->scan_lock);
2216         INIT_LIST_HEAD(&priv->scan_list);
2217         INIT_WORK(&priv->process_scan, orinoco_process_scan_results);
2218
2219         priv->last_linkstatus = 0xffff;
2220
2221 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
2222         priv->cached_pri_fw = NULL;
2223         priv->cached_fw = NULL;
2224 #endif
2225
2226         /* Register PM notifiers */
2227         orinoco_register_pm_notifier(priv);
2228
2229         return priv;
2230 }
2231 EXPORT_SYMBOL(alloc_orinocodev);
2232
2233 /* We can only support a single interface. We provide a separate
2234  * function to set it up to distinguish between hardware
2235  * initialisation and interface setup.
2236  *
2237  * The base_addr and irq parameters are passed on to netdev for use
2238  * with SIOCGIFMAP.
2239  */
2240 int orinoco_if_add(struct orinoco_private *priv,
2241                    unsigned long base_addr,
2242                    unsigned int irq,
2243                    const struct net_device_ops *ops)
2244 {
2245         struct wiphy *wiphy = priv_to_wiphy(priv);
2246         struct wireless_dev *wdev;
2247         struct net_device *dev;
2248         int ret;
2249
2250         dev = alloc_etherdev(sizeof(struct wireless_dev));
2251
2252         if (!dev)
2253                 return -ENOMEM;
2254
2255         /* Initialise wireless_dev */
2256         wdev = netdev_priv(dev);
2257         wdev->wiphy = wiphy;
2258         wdev->iftype = NL80211_IFTYPE_STATION;
2259
2260         /* Setup / override net_device fields */
2261         dev->ieee80211_ptr = wdev;
2262         dev->watchdog_timeo = HZ; /* 1 second timeout */
2263         dev->wireless_handlers = &orinoco_handler_def;
2264 #ifdef WIRELESS_SPY
2265         dev->wireless_data = &priv->wireless_data;
2266 #endif
2267         /* Default to standard ops if not set */
2268         if (ops)
2269                 dev->netdev_ops = ops;
2270         else
2271                 dev->netdev_ops = &orinoco_netdev_ops;
2272
2273         /* we use the default eth_mac_addr for setting the MAC addr */
2274
2275         /* Reserve space in skb for the SNAP header */
2276         dev->needed_headroom = ENCAPS_OVERHEAD;
2277
2278         netif_carrier_off(dev);
2279
2280         memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
2281         memcpy(dev->perm_addr, wiphy->perm_addr, ETH_ALEN);
2282
2283         dev->base_addr = base_addr;
2284         dev->irq = irq;
2285
2286         SET_NETDEV_DEV(dev, priv->dev);
2287         ret = register_netdev(dev);
2288         if (ret)
2289                 goto fail;
2290
2291         priv->ndev = dev;
2292
2293         /* Report what we've done */
2294         dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name);
2295
2296         return 0;
2297
2298  fail:
2299         free_netdev(dev);
2300         return ret;
2301 }
2302 EXPORT_SYMBOL(orinoco_if_add);
2303
2304 void orinoco_if_del(struct orinoco_private *priv)
2305 {
2306         struct net_device *dev = priv->ndev;
2307
2308         unregister_netdev(dev);
2309         free_netdev(dev);
2310 }
2311 EXPORT_SYMBOL(orinoco_if_del);
2312
2313 void free_orinocodev(struct orinoco_private *priv)
2314 {
2315         struct wiphy *wiphy = priv_to_wiphy(priv);
2316         struct orinoco_rx_data *rx_data, *temp;
2317         struct orinoco_scan_data *sd, *sdtemp;
2318
2319         wiphy_unregister(wiphy);
2320
2321         /* If the tasklet is scheduled when we call tasklet_kill it
2322          * will run one final time. However the tasklet will only
2323          * drain priv->rx_list if the hw is still available. */
2324         tasklet_kill(&priv->rx_tasklet);
2325
2326         /* Explicitly drain priv->rx_list */
2327         list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
2328                 list_del(&rx_data->list);
2329
2330                 dev_kfree_skb(rx_data->skb);
2331                 kfree(rx_data->desc);
2332                 kfree(rx_data);
2333         }
2334
2335         cancel_work_sync(&priv->process_scan);
2336         /* Explicitly drain priv->scan_list */
2337         list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) {
2338                 list_del(&sd->list);
2339
2340                 if ((sd->len > 0) && sd->buf)
2341                         kfree(sd->buf);
2342                 kfree(sd);
2343         }
2344
2345         orinoco_unregister_pm_notifier(priv);
2346         orinoco_uncache_fw(priv);
2347
2348         priv->wpa_ie_len = 0;
2349         kfree(priv->wpa_ie);
2350         orinoco_mic_free(priv);
2351         wiphy_free(wiphy);
2352 }
2353 EXPORT_SYMBOL(free_orinocodev);
2354
2355 int orinoco_up(struct orinoco_private *priv)
2356 {
2357         struct net_device *dev = priv->ndev;
2358         unsigned long flags;
2359         int err;
2360
2361         priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2362
2363         err = orinoco_reinit_firmware(priv);
2364         if (err) {
2365                 printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
2366                        dev->name, err);
2367                 goto exit;
2368         }
2369
2370         netif_device_attach(dev);
2371         priv->hw_unavailable--;
2372
2373         if (priv->open && !priv->hw_unavailable) {
2374                 err = __orinoco_up(priv);
2375                 if (err)
2376                         printk(KERN_ERR "%s: Error %d restarting card\n",
2377                                dev->name, err);
2378         }
2379
2380 exit:
2381         priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2382
2383         return 0;
2384 }
2385 EXPORT_SYMBOL(orinoco_up);
2386
2387 void orinoco_down(struct orinoco_private *priv)
2388 {
2389         struct net_device *dev = priv->ndev;
2390         unsigned long flags;
2391         int err;
2392
2393         priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2394         err = __orinoco_down(priv);
2395         if (err)
2396                 printk(KERN_WARNING "%s: Error %d downing interface\n",
2397                        dev->name, err);
2398
2399         netif_device_detach(dev);
2400         priv->hw_unavailable++;
2401         priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2402 }
2403 EXPORT_SYMBOL(orinoco_down);
2404
2405 /********************************************************************/
2406 /* Module initialization                                            */
2407 /********************************************************************/
2408
2409 /* Can't be declared "const" or the whole __initdata section will
2410  * become const */
2411 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
2412         " (David Gibson <hermes@gibson.dropbear.id.au>, "
2413         "Pavel Roskin <proski@gnu.org>, et al)";
2414
2415 static int __init init_orinoco(void)
2416 {
2417         printk(KERN_DEBUG "%s\n", version);
2418         return 0;
2419 }
2420
2421 static void __exit exit_orinoco(void)
2422 {
2423 }
2424
2425 module_init(init_orinoco);
2426 module_exit(exit_orinoco);