WorkStruct: make allyesconfig
[linux-3.10.git] / drivers / net / wireless / hostap / hostap_hw.c
1 /*
2  * Host AP (software wireless LAN access point) driver for
3  * Intersil Prism2/2.5/3.
4  *
5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6  * <jkmaline@cc.hut.fi>
7  * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation. See README and COPYING for
12  * more details.
13  *
14  * FIX:
15  * - there is currently no way of associating TX packets to correct wds device
16  *   when TX Exc/OK event occurs, so all tx_packets and some
17  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
18  *   field in txdesc might be used to fix this (using Alloc event to increment
19  *   tx_packets would need some further info in txfid table)
20  *
21  * Buffer Access Path (BAP) usage:
22  *   Prism2 cards have two separate BAPs for accessing the card memory. These
23  *   should allow concurrent access to two different frames and the driver
24  *   previously used BAP0 for sending data and BAP1 for receiving data.
25  *   However, there seems to be number of issues with concurrent access and at
26  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
27  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
28  *   host and card memories. BAP0 accesses are protected with local->baplock
29  *   (spin_lock_bh) to prevent concurrent use.
30  */
31
32
33
34 #include <asm/delay.h>
35 #include <asm/uaccess.h>
36
37 #include <linux/slab.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/proc_fs.h>
41 #include <linux/if_arp.h>
42 #include <linux/delay.h>
43 #include <linux/random.h>
44 #include <linux/wait.h>
45 #include <linux/sched.h>
46 #include <linux/rtnetlink.h>
47 #include <linux/wireless.h>
48 #include <net/iw_handler.h>
49 #include <net/ieee80211.h>
50 #include <net/ieee80211_crypt.h>
51 #include <asm/irq.h>
52
53 #include "hostap_80211.h"
54 #include "hostap.h"
55 #include "hostap_ap.h"
56
57
58 /* #define final_version */
59
60 static int mtu = 1500;
61 module_param(mtu, int, 0444);
62 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
63
64 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
65 module_param_array(channel, int, NULL, 0444);
66 MODULE_PARM_DESC(channel, "Initial channel");
67
68 static char essid[33] = "test";
69 module_param_string(essid, essid, sizeof(essid), 0444);
70 MODULE_PARM_DESC(essid, "Host AP's ESSID");
71
72 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
73 module_param_array(iw_mode, int, NULL, 0444);
74 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
75
76 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
77 module_param_array(beacon_int, int, NULL, 0444);
78 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
79
80 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
81 module_param_array(dtim_period, int, NULL, 0444);
82 MODULE_PARM_DESC(dtim_period, "DTIM period");
83
84 static char dev_template[16] = "wlan%d";
85 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
86 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
87                  "wlan%d)");
88
89 #ifdef final_version
90 #define EXTRA_EVENTS_WTERR 0
91 #else
92 /* check WTERR events (Wait Time-out) in development versions */
93 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
94 #endif
95
96 /* Events that will be using BAP0 */
97 #define HFA384X_BAP0_EVENTS \
98         (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
99
100 /* event mask, i.e., events that will result in an interrupt */
101 #define HFA384X_EVENT_MASK \
102         (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
103         HFA384X_EV_CMD | HFA384X_EV_TICK | \
104         EXTRA_EVENTS_WTERR)
105
106 /* Default TX control flags: use 802.11 headers and request interrupt for
107  * failed transmits. Frames that request ACK callback, will add
108  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
109  */
110 #define HFA384X_TX_CTRL_FLAGS \
111         (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
112
113
114 /* ca. 1 usec */
115 #define HFA384X_CMD_BUSY_TIMEOUT 5000
116 #define HFA384X_BAP_BUSY_TIMEOUT 50000
117
118 /* ca. 10 usec */
119 #define HFA384X_CMD_COMPL_TIMEOUT 20000
120 #define HFA384X_DL_COMPL_TIMEOUT 1000000
121
122 /* Wait times for initialization; yield to other processes to avoid busy
123  * waiting for long time. */
124 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
125 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
126
127
128 static void prism2_hw_reset(struct net_device *dev);
129 static void prism2_check_sta_fw_version(local_info_t *local);
130
131 #ifdef PRISM2_DOWNLOAD_SUPPORT
132 /* hostap_download.c */
133 static int prism2_download_aux_dump(struct net_device *dev,
134                                     unsigned int addr, int len, u8 *buf);
135 static u8 * prism2_read_pda(struct net_device *dev);
136 static int prism2_download(local_info_t *local,
137                            struct prism2_download_param *param);
138 static void prism2_download_free_data(struct prism2_download_data *dl);
139 static int prism2_download_volatile(local_info_t *local,
140                                     struct prism2_download_data *param);
141 static int prism2_download_genesis(local_info_t *local,
142                                    struct prism2_download_data *param);
143 static int prism2_get_ram_size(local_info_t *local);
144 #endif /* PRISM2_DOWNLOAD_SUPPORT */
145
146
147
148
149 #ifndef final_version
150 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
151  * present */
152 #define HFA384X_MAGIC 0x8A32
153 #endif
154
155
156 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
157 {
158         return HFA384X_INW(reg);
159 }
160
161
162 static void hfa384x_read_regs(struct net_device *dev,
163                               struct hfa384x_regs *regs)
164 {
165         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
166         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
167         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
168         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
169         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
170 }
171
172
173 /**
174  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
175  * @local: pointer to private Host AP driver data
176  * @entry: Prism2 command queue entry to be freed
177  * @del_req: request the entry to be removed
178  *
179  * Internal helper function for freeing Prism2 command queue entries.
180  * Caller must have acquired local->cmdlock before calling this function.
181  */
182 static inline void __hostap_cmd_queue_free(local_info_t *local,
183                                            struct hostap_cmd_queue *entry,
184                                            int del_req)
185 {
186         if (del_req) {
187                 entry->del_req = 1;
188                 if (!list_empty(&entry->list)) {
189                         list_del_init(&entry->list);
190                         local->cmd_queue_len--;
191                 }
192         }
193
194         if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
195                 kfree(entry);
196 }
197
198
199 /**
200  * hostap_cmd_queue_free - Free Prism2 command queue entry
201  * @local: pointer to private Host AP driver data
202  * @entry: Prism2 command queue entry to be freed
203  * @del_req: request the entry to be removed
204  *
205  * Free a Prism2 command queue entry.
206  */
207 static inline void hostap_cmd_queue_free(local_info_t *local,
208                                          struct hostap_cmd_queue *entry,
209                                          int del_req)
210 {
211         unsigned long flags;
212
213         spin_lock_irqsave(&local->cmdlock, flags);
214         __hostap_cmd_queue_free(local, entry, del_req);
215         spin_unlock_irqrestore(&local->cmdlock, flags);
216 }
217
218
219 /**
220  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
221  * @local: pointer to private Host AP driver data
222  */
223 static void prism2_clear_cmd_queue(local_info_t *local)
224 {
225         struct list_head *ptr, *n;
226         unsigned long flags;
227         struct hostap_cmd_queue *entry;
228
229         spin_lock_irqsave(&local->cmdlock, flags);
230         list_for_each_safe(ptr, n, &local->cmd_queue) {
231                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
232                 atomic_inc(&entry->usecnt);
233                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
234                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
235                        local->dev->name, entry->type, entry->cmd,
236                        entry->param0);
237                 __hostap_cmd_queue_free(local, entry, 1);
238         }
239         if (local->cmd_queue_len) {
240                 /* This should not happen; print debug message and clear
241                  * queue length. */
242                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
243                        "flush\n", local->dev->name, local->cmd_queue_len);
244                 local->cmd_queue_len = 0;
245         }
246         spin_unlock_irqrestore(&local->cmdlock, flags);
247 }
248
249
250 /**
251  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
252  * @dev: pointer to net_device
253  * @entry: Prism2 command queue entry to be issued
254  */
255 static int hfa384x_cmd_issue(struct net_device *dev,
256                                     struct hostap_cmd_queue *entry)
257 {
258         struct hostap_interface *iface;
259         local_info_t *local;
260         int tries;
261         u16 reg;
262         unsigned long flags;
263
264         iface = netdev_priv(dev);
265         local = iface->local;
266
267         if (local->func->card_present && !local->func->card_present(local))
268                 return -ENODEV;
269
270         if (entry->issued) {
271                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
272                        dev->name, entry);
273         }
274
275         /* wait until busy bit is clear; this should always be clear since the
276          * commands are serialized */
277         tries = HFA384X_CMD_BUSY_TIMEOUT;
278         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
279                 tries--;
280                 udelay(1);
281         }
282 #ifndef final_version
283         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
284                 prism2_io_debug_error(dev, 1);
285                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
286                        "for %d usec\n", dev->name,
287                        HFA384X_CMD_BUSY_TIMEOUT - tries);
288         }
289 #endif
290         if (tries == 0) {
291                 reg = HFA384X_INW(HFA384X_CMD_OFF);
292                 prism2_io_debug_error(dev, 2);
293                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
294                        "reg=0x%04x\n", dev->name, reg);
295                 return -ETIMEDOUT;
296         }
297
298         /* write command */
299         spin_lock_irqsave(&local->cmdlock, flags);
300         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
301         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
302         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
303         entry->issued = 1;
304         spin_unlock_irqrestore(&local->cmdlock, flags);
305
306         return 0;
307 }
308
309
310 /**
311  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
312  * @dev: pointer to net_device
313  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
314  * @param0: value for Param0 register
315  * @param1: value for Param1 register (pointer; %NULL if not used)
316  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
317  *
318  * Issue given command (possibly after waiting in command queue) and sleep
319  * until the command is completed (or timed out or interrupted). This can be
320  * called only from user process context.
321  */
322 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
323                        u16 *param1, u16 *resp0)
324 {
325         struct hostap_interface *iface;
326         local_info_t *local;
327         int err, res, issue, issued = 0;
328         unsigned long flags;
329         struct hostap_cmd_queue *entry;
330         DECLARE_WAITQUEUE(wait, current);
331
332         iface = netdev_priv(dev);
333         local = iface->local;
334
335         if (in_interrupt()) {
336                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
337                        "context\n", dev->name);
338                 return -1;
339         }
340
341         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
342                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
343                        dev->name);
344                 return -1;
345         }
346
347         if (signal_pending(current))
348                 return -EINTR;
349
350         entry = (struct hostap_cmd_queue *)
351                 kmalloc(sizeof(*entry), GFP_ATOMIC);
352         if (entry == NULL) {
353                 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
354                        dev->name);
355                 return -ENOMEM;
356         }
357         memset(entry, 0, sizeof(*entry));
358         atomic_set(&entry->usecnt, 1);
359         entry->type = CMD_SLEEP;
360         entry->cmd = cmd;
361         entry->param0 = param0;
362         if (param1)
363                 entry->param1 = *param1;
364         init_waitqueue_head(&entry->compl);
365
366         /* prepare to wait for command completion event, but do not sleep yet
367          */
368         add_wait_queue(&entry->compl, &wait);
369         set_current_state(TASK_INTERRUPTIBLE);
370
371         spin_lock_irqsave(&local->cmdlock, flags);
372         issue = list_empty(&local->cmd_queue);
373         if (issue)
374                 entry->issuing = 1;
375         list_add_tail(&entry->list, &local->cmd_queue);
376         local->cmd_queue_len++;
377         spin_unlock_irqrestore(&local->cmdlock, flags);
378
379         err = 0;
380         if (!issue)
381                 goto wait_completion;
382
383         if (signal_pending(current))
384                 err = -EINTR;
385
386         if (!err) {
387                 if (hfa384x_cmd_issue(dev, entry))
388                         err = -ETIMEDOUT;
389                 else
390                         issued = 1;
391         }
392
393  wait_completion:
394         if (!err && entry->type != CMD_COMPLETED) {
395                 /* sleep until command is completed or timed out */
396                 res = schedule_timeout(2 * HZ);
397         } else
398                 res = -1;
399
400         if (!err && signal_pending(current))
401                 err = -EINTR;
402
403         if (err && issued) {
404                 /* the command was issued, so a CmdCompl event should occur
405                  * soon; however, there's a pending signal and
406                  * schedule_timeout() would be interrupted; wait a short period
407                  * of time to avoid removing entry from the list before
408                  * CmdCompl event */
409                 udelay(300);
410         }
411
412         set_current_state(TASK_RUNNING);
413         remove_wait_queue(&entry->compl, &wait);
414
415         /* If entry->list is still in the list, it must be removed
416          * first and in this case prism2_cmd_ev() does not yet have
417          * local reference to it, and the data can be kfree()'d
418          * here. If the command completion event is still generated,
419          * it will be assigned to next (possibly) pending command, but
420          * the driver will reset the card anyway due to timeout
421          *
422          * If the entry is not in the list prism2_cmd_ev() has a local
423          * reference to it, but keeps cmdlock as long as the data is
424          * needed, so the data can be kfree()'d here. */
425
426         /* FIX: if the entry->list is in the list, it has not been completed
427          * yet, so removing it here is somewhat wrong.. this could cause
428          * references to freed memory and next list_del() causing NULL pointer
429          * dereference.. it would probably be better to leave the entry in the
430          * list and the list should be emptied during hw reset */
431
432         spin_lock_irqsave(&local->cmdlock, flags);
433         if (!list_empty(&entry->list)) {
434                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
435                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
436                        entry->type, res);
437                 list_del_init(&entry->list);
438                 local->cmd_queue_len--;
439         }
440         spin_unlock_irqrestore(&local->cmdlock, flags);
441
442         if (err) {
443                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
444                        dev->name, err);
445                 res = err;
446                 goto done;
447         }
448
449         if (entry->type != CMD_COMPLETED) {
450                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
451                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
452                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
453                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
454                        res, entry, entry->type, entry->cmd, entry->param0, reg,
455                        HFA384X_INW(HFA384X_INTEN_OFF));
456                 if (reg & HFA384X_EV_CMD) {
457                         /* Command completion event is pending, but the
458                          * interrupt was not delivered - probably an issue
459                          * with pcmcia-cs configuration. */
460                         printk(KERN_WARNING "%s: interrupt delivery does not "
461                                "seem to work\n", dev->name);
462                 }
463                 prism2_io_debug_error(dev, 3);
464                 res = -ETIMEDOUT;
465                 goto done;
466         }
467
468         if (resp0 != NULL)
469                 *resp0 = entry->resp0;
470 #ifndef final_version
471         if (entry->res) {
472                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
473                        "resp0=0x%04x\n",
474                        dev->name, cmd, entry->res, entry->resp0);
475         }
476 #endif /* final_version */
477
478         res = entry->res;
479  done:
480         hostap_cmd_queue_free(local, entry, 1);
481         return res;
482 }
483
484
485 /**
486  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
487  * @dev: pointer to net_device
488  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
489  * @param0: value for Param0 register
490  * @callback: command completion callback function (%NULL = no callback)
491  * @context: context data to be given to the callback function
492  *
493  * Issue given command (possibly after waiting in command queue) and use
494  * callback function to indicate command completion. This can be called both
495  * from user and interrupt context. The callback function will be called in
496  * hardware IRQ context. It can be %NULL, when no function is called when
497  * command is completed.
498  */
499 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
500                                 void (*callback)(struct net_device *dev,
501                                                  long context, u16 resp0,
502                                                  u16 status),
503                                 long context)
504 {
505         struct hostap_interface *iface;
506         local_info_t *local;
507         int issue, ret;
508         unsigned long flags;
509         struct hostap_cmd_queue *entry;
510
511         iface = netdev_priv(dev);
512         local = iface->local;
513
514         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
515                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
516                        dev->name);
517                 return -1;
518         }
519
520         entry = (struct hostap_cmd_queue *)
521                 kmalloc(sizeof(*entry), GFP_ATOMIC);
522         if (entry == NULL) {
523                 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
524                        "failed\n", dev->name);
525                 return -ENOMEM;
526         }
527         memset(entry, 0, sizeof(*entry));
528         atomic_set(&entry->usecnt, 1);
529         entry->type = CMD_CALLBACK;
530         entry->cmd = cmd;
531         entry->param0 = param0;
532         entry->callback = callback;
533         entry->context = context;
534
535         spin_lock_irqsave(&local->cmdlock, flags);
536         issue = list_empty(&local->cmd_queue);
537         if (issue)
538                 entry->issuing = 1;
539         list_add_tail(&entry->list, &local->cmd_queue);
540         local->cmd_queue_len++;
541         spin_unlock_irqrestore(&local->cmdlock, flags);
542
543         if (issue && hfa384x_cmd_issue(dev, entry))
544                 ret = -ETIMEDOUT;
545         else
546                 ret = 0;
547
548         hostap_cmd_queue_free(local, entry, ret);
549
550         return ret;
551 }
552
553
554 /**
555  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
556  * @dev: pointer to net_device
557  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
558  * @param0: value for Param0 register
559  * @io_debug_num: I/O debug error number
560  *
561  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
562  */
563 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
564                                  int io_debug_num)
565 {
566         int tries;
567         u16 reg;
568
569         /* wait until busy bit is clear; this should always be clear since the
570          * commands are serialized */
571         tries = HFA384X_CMD_BUSY_TIMEOUT;
572         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
573                 tries--;
574                 udelay(1);
575         }
576         if (tries == 0) {
577                 reg = HFA384X_INW(HFA384X_CMD_OFF);
578                 prism2_io_debug_error(dev, io_debug_num);
579                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
580                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
581                 return -ETIMEDOUT;
582         }
583
584         /* write command */
585         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
586         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
587
588         return 0;
589 }
590
591
592 /**
593  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
594  * @dev: pointer to net_device
595  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
596  * @param0: value for Param0 register
597  */
598 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
599 {
600         int res, tries;
601         u16 reg;
602
603         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
604         if (res)
605                 return res;
606
607         /* wait for command completion */
608         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
609                 tries = HFA384X_DL_COMPL_TIMEOUT;
610         else
611                 tries = HFA384X_CMD_COMPL_TIMEOUT;
612
613         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
614                tries > 0) {
615                 tries--;
616                 udelay(10);
617         }
618         if (tries == 0) {
619                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
620                 prism2_io_debug_error(dev, 5);
621                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
622                        "reg=0x%04x\n", dev->name, reg);
623                 return -ETIMEDOUT;
624         }
625
626         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
627                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
628                 BIT(8))) >> 8;
629 #ifndef final_version
630         if (res) {
631                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
632                        dev->name, cmd, res);
633         }
634 #endif
635
636         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
637
638         return res;
639 }
640
641
642 /**
643  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
644  * @dev: pointer to net_device
645  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
646  * @param0: value for Param0 register
647  */
648 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
649                                       u16 param0)
650 {
651         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
652 }
653
654
655 /**
656  * prism2_cmd_ev - Prism2 command completion event handler
657  * @dev: pointer to net_device
658  *
659  * Interrupt handler for command completion events. Called by the main
660  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
661  * from the hardware and ACK the event. Depending on the issued command type
662  * either wake up the sleeping process that is waiting for command completion
663  * or call the callback function. Issue the next command, if one is pending.
664  */
665 static void prism2_cmd_ev(struct net_device *dev)
666 {
667         struct hostap_interface *iface;
668         local_info_t *local;
669         struct hostap_cmd_queue *entry = NULL;
670
671         iface = netdev_priv(dev);
672         local = iface->local;
673
674         spin_lock(&local->cmdlock);
675         if (!list_empty(&local->cmd_queue)) {
676                 entry = list_entry(local->cmd_queue.next,
677                                    struct hostap_cmd_queue, list);
678                 atomic_inc(&entry->usecnt);
679                 list_del_init(&entry->list);
680                 local->cmd_queue_len--;
681
682                 if (!entry->issued) {
683                         printk(KERN_DEBUG "%s: Command completion event, but "
684                                "cmd not issued\n", dev->name);
685                         __hostap_cmd_queue_free(local, entry, 1);
686                         entry = NULL;
687                 }
688         }
689         spin_unlock(&local->cmdlock);
690
691         if (!entry) {
692                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
693                 printk(KERN_DEBUG "%s: Command completion event, but no "
694                        "pending commands\n", dev->name);
695                 return;
696         }
697
698         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
699         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
700                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
701                        BIT(9) | BIT(8))) >> 8;
702         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
703
704         /* TODO: rest of the CmdEv handling could be moved to tasklet */
705         if (entry->type == CMD_SLEEP) {
706                 entry->type = CMD_COMPLETED;
707                 wake_up_interruptible(&entry->compl);
708         } else if (entry->type == CMD_CALLBACK) {
709                 if (entry->callback)
710                         entry->callback(dev, entry->context, entry->resp0,
711                                         entry->res);
712         } else {
713                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
714                        dev->name, entry->type);
715         }
716         hostap_cmd_queue_free(local, entry, 1);
717
718         /* issue next command, if pending */
719         entry = NULL;
720         spin_lock(&local->cmdlock);
721         if (!list_empty(&local->cmd_queue)) {
722                 entry = list_entry(local->cmd_queue.next,
723                                    struct hostap_cmd_queue, list);
724                 if (entry->issuing) {
725                         /* hfa384x_cmd() has already started issuing this
726                          * command, so do not start here */
727                         entry = NULL;
728                 }
729                 if (entry)
730                         atomic_inc(&entry->usecnt);
731         }
732         spin_unlock(&local->cmdlock);
733
734         if (entry) {
735                 /* issue next command; if command issuing fails, remove the
736                  * entry from cmd_queue */
737                 int res = hfa384x_cmd_issue(dev, entry);
738                 spin_lock(&local->cmdlock);
739                 __hostap_cmd_queue_free(local, entry, res);
740                 spin_unlock(&local->cmdlock);
741         }
742 }
743
744
745 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
746 {
747         int tries = HFA384X_BAP_BUSY_TIMEOUT;
748         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
749
750         while (res && tries > 0) {
751                 tries--;
752                 udelay(1);
753                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
754         }
755         return res;
756 }
757
758
759 /* Offset must be even */
760 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
761                              int offset)
762 {
763         u16 o_off, s_off;
764         int ret = 0;
765
766         if (offset % 2 || bap > 1)
767                 return -EINVAL;
768
769         if (bap == BAP1) {
770                 o_off = HFA384X_OFFSET1_OFF;
771                 s_off = HFA384X_SELECT1_OFF;
772         } else {
773                 o_off = HFA384X_OFFSET0_OFF;
774                 s_off = HFA384X_SELECT0_OFF;
775         }
776
777         if (hfa384x_wait_offset(dev, o_off)) {
778                 prism2_io_debug_error(dev, 7);
779                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
780                        dev->name);
781                 ret = -ETIMEDOUT;
782                 goto out;
783         }
784
785         HFA384X_OUTW(id, s_off);
786         HFA384X_OUTW(offset, o_off);
787
788         if (hfa384x_wait_offset(dev, o_off)) {
789                 prism2_io_debug_error(dev, 8);
790                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
791                        dev->name);
792                 ret = -ETIMEDOUT;
793                 goto out;
794         }
795 #ifndef final_version
796         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
797                 prism2_io_debug_error(dev, 9);
798                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
799                        "(%d,0x04%x,%d); reg=0x%04x\n",
800                        dev->name, bap, id, offset, HFA384X_INW(o_off));
801                 ret = -EINVAL;
802         }
803 #endif
804
805  out:
806         return ret;
807 }
808
809
810 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
811                            int exact_len)
812 {
813         struct hostap_interface *iface;
814         local_info_t *local;
815         int res, rlen = 0;
816         struct hfa384x_rid_hdr rec;
817
818         iface = netdev_priv(dev);
819         local = iface->local;
820
821         if (local->no_pri) {
822                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
823                        "f/w\n", dev->name, rid, len);
824                 return -ENOTTY; /* Well.. not really correct, but return
825                                  * something unique enough.. */
826         }
827
828         if ((local->func->card_present && !local->func->card_present(local)) ||
829             local->hw_downloading)
830                 return -ENODEV;
831
832         res = down_interruptible(&local->rid_bap_sem);
833         if (res)
834                 return res;
835
836         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
837         if (res) {
838                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
839                        "(res=%d, rid=%04x, len=%d)\n",
840                        dev->name, res, rid, len);
841                 up(&local->rid_bap_sem);
842                 return res;
843         }
844
845         spin_lock_bh(&local->baplock);
846
847         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
848         if (!res)
849                 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
850
851         if (le16_to_cpu(rec.len) == 0) {
852                 /* RID not available */
853                 res = -ENODATA;
854         }
855
856         rlen = (le16_to_cpu(rec.len) - 1) * 2;
857         if (!res && exact_len && rlen != len) {
858                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
859                        "rid=0x%04x, len=%d (expected %d)\n",
860                        dev->name, rid, rlen, len);
861                 res = -ENODATA;
862         }
863
864         if (!res)
865                 res = hfa384x_from_bap(dev, BAP0, buf, len);
866
867         spin_unlock_bh(&local->baplock);
868         up(&local->rid_bap_sem);
869
870         if (res) {
871                 if (res != -ENODATA)
872                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
873                                "len=%d) - failed - res=%d\n", dev->name, rid,
874                                len, res);
875                 if (res == -ETIMEDOUT)
876                         prism2_hw_reset(dev);
877                 return res;
878         }
879
880         return rlen;
881 }
882
883
884 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
885 {
886         struct hostap_interface *iface;
887         local_info_t *local;
888         struct hfa384x_rid_hdr rec;
889         int res;
890
891         iface = netdev_priv(dev);
892         local = iface->local;
893
894         if (local->no_pri) {
895                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
896                        "f/w\n", dev->name, rid, len);
897                 return -ENOTTY; /* Well.. not really correct, but return
898                                  * something unique enough.. */
899         }
900
901         if ((local->func->card_present && !local->func->card_present(local)) ||
902             local->hw_downloading)
903                 return -ENODEV;
904
905         rec.rid = cpu_to_le16(rid);
906         /* RID len in words and +1 for rec.rid */
907         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
908
909         res = down_interruptible(&local->rid_bap_sem);
910         if (res)
911                 return res;
912
913         spin_lock_bh(&local->baplock);
914         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
915         if (!res)
916                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
917         if (!res)
918                 res = hfa384x_to_bap(dev, BAP0, buf, len);
919         spin_unlock_bh(&local->baplock);
920
921         if (res) {
922                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
923                        "failed - res=%d\n", dev->name, rid, len, res);
924                 up(&local->rid_bap_sem);
925                 return res;
926         }
927
928         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
929         up(&local->rid_bap_sem);
930
931         if (res) {
932                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
933                        "failed (res=%d, rid=%04x, len=%d)\n",
934                        dev->name, res, rid, len);
935
936                 if (res == -ETIMEDOUT)
937                         prism2_hw_reset(dev);
938         }
939
940         return res;
941 }
942
943
944 static void hfa384x_disable_interrupts(struct net_device *dev)
945 {
946         /* disable interrupts and clear event status */
947         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
948         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
949 }
950
951
952 static void hfa384x_enable_interrupts(struct net_device *dev)
953 {
954         /* ack pending events and enable interrupts from selected events */
955         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
956         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
957 }
958
959
960 static void hfa384x_events_no_bap0(struct net_device *dev)
961 {
962         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
963                      HFA384X_INTEN_OFF);
964 }
965
966
967 static void hfa384x_events_all(struct net_device *dev)
968 {
969         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
970 }
971
972
973 static void hfa384x_events_only_cmd(struct net_device *dev)
974 {
975         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
976 }
977
978
979 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
980 {
981         u16 fid;
982         unsigned long delay;
983
984         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
985          * below would be handled like CmdCompl event (sleep here, wake up from
986          * interrupt handler */
987         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
988                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
989                        dev->name, len);
990                 return 0xffff;
991         }
992
993         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
994         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
995                time_before(jiffies, delay))
996                 yield();
997         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
998                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
999                 return 0xffff;
1000         }
1001
1002         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
1003         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1004
1005         return fid;
1006 }
1007
1008
1009 static int prism2_reset_port(struct net_device *dev)
1010 {
1011         struct hostap_interface *iface;
1012         local_info_t *local;
1013         int res;
1014
1015         iface = netdev_priv(dev);
1016         local = iface->local;
1017
1018         if (!local->dev_enabled)
1019                 return 0;
1020
1021         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1022                           NULL, NULL);
1023         if (res)
1024                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1025                        dev->name);
1026         else {
1027                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1028                                   NULL, NULL);
1029                 if (res)
1030                         printk(KERN_DEBUG "%s: reset port failed to enable "
1031                                "port\n", dev->name);
1032         }
1033
1034         /* It looks like at least some STA firmware versions reset
1035          * fragmentation threshold back to 2346 after enable command. Restore
1036          * the configured value, if it differs from this default. */
1037         if (local->fragm_threshold != 2346 &&
1038             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1039                             local->fragm_threshold)) {
1040                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1041                        "threshold (%d) after Port0 enable\n",
1042                        dev->name, local->fragm_threshold);
1043         }
1044
1045         /* Some firmwares lose antenna selection settings on reset */
1046         (void) hostap_set_antsel(local);
1047
1048         return res;
1049 }
1050
1051
1052 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1053                                    const char *txt)
1054 {
1055         struct hfa384x_comp_ident comp;
1056         struct hostap_interface *iface;
1057         local_info_t *local;
1058
1059         iface = netdev_priv(dev);
1060         local = iface->local;
1061
1062         if (local->no_pri) {
1063                 /* PRI f/w not yet available - cannot read RIDs */
1064                 return -1;
1065         }
1066         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1067                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1068                 return -1;
1069         }
1070
1071         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1072                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1073                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1074         return 0;
1075 }
1076
1077
1078 static int prism2_setup_rids(struct net_device *dev)
1079 {
1080         struct hostap_interface *iface;
1081         local_info_t *local;
1082         u16 tmp;
1083         int ret = 0;
1084
1085         iface = netdev_priv(dev);
1086         local = iface->local;
1087
1088         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1089
1090         if (!local->fw_ap) {
1091                 tmp = hostap_get_porttype(local);
1092                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
1093                 if (ret) {
1094                         printk("%s: Port type setting to %d failed\n",
1095                                dev->name, tmp);
1096                         goto fail;
1097                 }
1098         }
1099
1100         /* Setting SSID to empty string seems to kill the card in Host AP mode
1101          */
1102         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1103                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1104                                         local->essid);
1105                 if (ret) {
1106                         printk("%s: AP own SSID setting failed\n", dev->name);
1107                         goto fail;
1108                 }
1109         }
1110
1111         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1112                               PRISM2_DATA_MAXLEN);
1113         if (ret) {
1114                 printk("%s: MAC data length setting to %d failed\n",
1115                        dev->name, PRISM2_DATA_MAXLEN);
1116                 goto fail;
1117         }
1118
1119         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1120                 printk("%s: Channel list read failed\n", dev->name);
1121                 ret = -EINVAL;
1122                 goto fail;
1123         }
1124         local->channel_mask = __le16_to_cpu(tmp);
1125
1126         if (local->channel < 1 || local->channel > 14 ||
1127             !(local->channel_mask & (1 << (local->channel - 1)))) {
1128                 printk(KERN_WARNING "%s: Channel setting out of range "
1129                        "(%d)!\n", dev->name, local->channel);
1130                 ret = -EBUSY;
1131                 goto fail;
1132         }
1133
1134         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1135         if (ret) {
1136                 printk("%s: Channel setting to %d failed\n",
1137                        dev->name, local->channel);
1138                 goto fail;
1139         }
1140
1141         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1142                               local->beacon_int);
1143         if (ret) {
1144                 printk("%s: Beacon interval setting to %d failed\n",
1145                        dev->name, local->beacon_int);
1146                 /* this may fail with Symbol/Lucent firmware */
1147                 if (ret == -ETIMEDOUT)
1148                         goto fail;
1149         }
1150
1151         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1152                               local->dtim_period);
1153         if (ret) {
1154                 printk("%s: DTIM period setting to %d failed\n",
1155                        dev->name, local->dtim_period);
1156                 /* this may fail with Symbol/Lucent firmware */
1157                 if (ret == -ETIMEDOUT)
1158                         goto fail;
1159         }
1160
1161         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1162                               local->is_promisc);
1163         if (ret)
1164                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1165                        dev->name, local->is_promisc);
1166
1167         if (!local->fw_ap) {
1168                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1169                                         local->essid);
1170                 if (ret) {
1171                         printk("%s: Desired SSID setting failed\n", dev->name);
1172                         goto fail;
1173                 }
1174         }
1175
1176         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1177          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1178          * rates */
1179         if (local->tx_rate_control == 0) {
1180                 local->tx_rate_control =
1181                         HFA384X_RATES_1MBPS |
1182                         HFA384X_RATES_2MBPS |
1183                         HFA384X_RATES_5MBPS |
1184                         HFA384X_RATES_11MBPS;
1185         }
1186         if (local->basic_rates == 0)
1187                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1188
1189         if (!local->fw_ap) {
1190                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1191                                       local->tx_rate_control);
1192                 if (ret) {
1193                         printk("%s: TXRateControl setting to %d failed\n",
1194                                dev->name, local->tx_rate_control);
1195                         goto fail;
1196                 }
1197
1198                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1199                                       local->tx_rate_control);
1200                 if (ret) {
1201                         printk("%s: cnfSupportedRates setting to %d failed\n",
1202                                dev->name, local->tx_rate_control);
1203                 }
1204
1205                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1206                                       local->basic_rates);
1207                 if (ret) {
1208                         printk("%s: cnfBasicRates setting to %d failed\n",
1209                                dev->name, local->basic_rates);
1210                 }
1211
1212                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1213                 if (ret) {
1214                         printk("%s: Create IBSS setting to 1 failed\n",
1215                                dev->name);
1216                 }
1217         }
1218
1219         if (local->name_set)
1220                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1221                                          local->name);
1222
1223         if (hostap_set_encryption(local)) {
1224                 printk(KERN_INFO "%s: could not configure encryption\n",
1225                        dev->name);
1226         }
1227
1228         (void) hostap_set_antsel(local);
1229
1230         if (hostap_set_roaming(local)) {
1231                 printk(KERN_INFO "%s: could not set host roaming\n",
1232                        dev->name);
1233         }
1234
1235         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1236             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1237                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1238                        dev->name, local->enh_sec);
1239
1240         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1241          * not working correctly (last seven counters report bogus values).
1242          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1243          * beginning with that firmware version. Another bug fix for 32-bit
1244          * tallies in 1.4.0; should 16-bit tallies be used for some other
1245          * versions, too? */
1246         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1247                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1248                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1249                                "failed\n", dev->name);
1250                         local->tallies32 = 0;
1251                 } else
1252                         local->tallies32 = 1;
1253         } else
1254                 local->tallies32 = 0;
1255
1256         hostap_set_auth_algs(local);
1257
1258         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1259                             local->fragm_threshold)) {
1260                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1261                        "failed\n", dev->name, local->fragm_threshold);
1262         }
1263
1264         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1265                             local->rts_threshold)) {
1266                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1267                        dev->name, local->rts_threshold);
1268         }
1269
1270         if (local->manual_retry_count >= 0 &&
1271             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1272                             local->manual_retry_count)) {
1273                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1274                        dev->name, local->manual_retry_count);
1275         }
1276
1277         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1278             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1279                 local->rssi_to_dBm = le16_to_cpu(tmp);
1280         }
1281
1282         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1283             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1284                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1285                        dev->name);
1286         }
1287
1288         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1289             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1290                             local->generic_elem, local->generic_elem_len)) {
1291                 printk(KERN_INFO "%s: setting genericElement failed\n",
1292                        dev->name);
1293         }
1294
1295  fail:
1296         return ret;
1297 }
1298
1299
1300 static int prism2_hw_init(struct net_device *dev, int initial)
1301 {
1302         struct hostap_interface *iface;
1303         local_info_t *local;
1304         int ret, first = 1;
1305         unsigned long start, delay;
1306
1307         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1308
1309         iface = netdev_priv(dev);
1310         local = iface->local;
1311
1312         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1313
1314  init:
1315         /* initialize HFA 384x */
1316         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1317         if (ret) {
1318                 printk(KERN_INFO "%s: first command failed - assuming card "
1319                        "does not have primary firmware\n", dev_info);
1320         }
1321
1322         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1323                 /* EvStat has Cmd bit set in some cases, so retry once if no
1324                  * wait was needed */
1325                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1326                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1327                        "retrying\n", dev->name);
1328                 first = 0;
1329                 goto init;
1330         }
1331
1332         start = jiffies;
1333         delay = jiffies + HFA384X_INIT_TIMEOUT;
1334         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1335                time_before(jiffies, delay))
1336                 yield();
1337         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1338                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1339                        "flash - card initialization not completed\n",
1340                        dev_info);
1341                 local->no_pri = 1;
1342 #ifdef PRISM2_DOWNLOAD_SUPPORT
1343                         if (local->sram_type == -1)
1344                                 local->sram_type = prism2_get_ram_size(local);
1345 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1346                 return 1;
1347         }
1348         local->no_pri = 0;
1349         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1350                (jiffies - start) * 1000 / HZ);
1351         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1352         return 0;
1353 }
1354
1355
1356 static int prism2_hw_init2(struct net_device *dev, int initial)
1357 {
1358         struct hostap_interface *iface;
1359         local_info_t *local;
1360         int i;
1361
1362         iface = netdev_priv(dev);
1363         local = iface->local;
1364
1365 #ifdef PRISM2_DOWNLOAD_SUPPORT
1366         kfree(local->pda);
1367         if (local->no_pri)
1368                 local->pda = NULL;
1369         else
1370                 local->pda = prism2_read_pda(dev);
1371 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1372
1373         hfa384x_disable_interrupts(dev);
1374
1375 #ifndef final_version
1376         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1377         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1378                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1379                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1380                 goto failed;
1381         }
1382 #endif
1383
1384         if (initial || local->pri_only) {
1385                 hfa384x_events_only_cmd(dev);
1386                 /* get card version information */
1387                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1388                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1389                         hfa384x_disable_interrupts(dev);
1390                         goto failed;
1391                 }
1392
1393                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1394                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1395                                "- only Primary f/w present\n", dev->name);
1396                         local->pri_only = 1;
1397                         return 0;
1398                 }
1399                 local->pri_only = 0;
1400                 hfa384x_disable_interrupts(dev);
1401         }
1402
1403         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1404          * enable interrupts before this. This would also require some sort of
1405          * sleeping AllocEv waiting */
1406
1407         /* allocate TX FIDs */
1408         local->txfid_len = PRISM2_TXFID_LEN;
1409         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1410                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1411                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1412                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1413                         if (local->txfid[i] != 0xffff) {
1414                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1415                                        "(1600 bytes)\n", dev->name);
1416                                 local->txfid_len = 1600;
1417                         }
1418                 }
1419                 if (local->txfid[i] == 0xffff)
1420                         goto failed;
1421                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1422         }
1423
1424         hfa384x_events_only_cmd(dev);
1425
1426         if (initial) {
1427                 struct list_head *ptr;
1428                 prism2_check_sta_fw_version(local);
1429
1430                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1431                                     &dev->dev_addr, 6, 1) < 0) {
1432                         printk("%s: could not get own MAC address\n",
1433                                dev->name);
1434                 }
1435                 list_for_each(ptr, &local->hostap_interfaces) {
1436                         iface = list_entry(ptr, struct hostap_interface, list);
1437                         memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1438                 }
1439         } else if (local->fw_ap)
1440                 prism2_check_sta_fw_version(local);
1441
1442         prism2_setup_rids(dev);
1443
1444         /* MAC is now configured, but port 0 is not yet enabled */
1445         return 0;
1446
1447  failed:
1448         if (!local->no_pri)
1449                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1450         return 1;
1451 }
1452
1453
1454 static int prism2_hw_enable(struct net_device *dev, int initial)
1455 {
1456         struct hostap_interface *iface;
1457         local_info_t *local;
1458         int was_resetting;
1459
1460         iface = netdev_priv(dev);
1461         local = iface->local;
1462         was_resetting = local->hw_resetting;
1463
1464         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1465                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1466                 return 1;
1467         }
1468
1469         local->hw_ready = 1;
1470         local->hw_reset_tries = 0;
1471         local->hw_resetting = 0;
1472         hfa384x_enable_interrupts(dev);
1473
1474         /* at least D-Link DWL-650 seems to require additional port reset
1475          * before it starts acting as an AP, so reset port automatically
1476          * here just in case */
1477         if (initial && prism2_reset_port(dev)) {
1478                 printk("%s: MAC port 0 reseting failed\n", dev->name);
1479                 return 1;
1480         }
1481
1482         if (was_resetting && netif_queue_stopped(dev)) {
1483                 /* If hw_reset() was called during pending transmit, netif
1484                  * queue was stopped. Wake it up now since the wlan card has
1485                  * been resetted. */
1486                 netif_wake_queue(dev);
1487         }
1488
1489         return 0;
1490 }
1491
1492
1493 static int prism2_hw_config(struct net_device *dev, int initial)
1494 {
1495         struct hostap_interface *iface;
1496         local_info_t *local;
1497
1498         iface = netdev_priv(dev);
1499         local = iface->local;
1500
1501         if (local->hw_downloading)
1502                 return 1;
1503
1504         if (prism2_hw_init(dev, initial)) {
1505                 return local->no_pri ? 0 : 1;
1506         }
1507
1508         if (prism2_hw_init2(dev, initial))
1509                 return 1;
1510
1511         /* Enable firmware if secondary image is loaded and at least one of the
1512          * netdevices is up. */
1513         if (!local->pri_only &&
1514             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1515                 if (!local->dev_enabled)
1516                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1517                 local->dev_enabled = 1;
1518                 return prism2_hw_enable(dev, initial);
1519         }
1520
1521         return 0;
1522 }
1523
1524
1525 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1526 {
1527         struct hostap_interface *iface;
1528         local_info_t *local;
1529
1530         iface = netdev_priv(dev);
1531         local = iface->local;
1532
1533         /* Allow only command completion events during disable */
1534         hfa384x_events_only_cmd(dev);
1535
1536         local->hw_ready = 0;
1537         if (local->dev_enabled)
1538                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1539         local->dev_enabled = 0;
1540
1541         if (local->func->card_present && !local->func->card_present(local)) {
1542                 printk(KERN_DEBUG "%s: card already removed or not configured "
1543                        "during shutdown\n", dev->name);
1544                 return;
1545         }
1546
1547         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1548             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1549                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1550
1551         hfa384x_disable_interrupts(dev);
1552
1553         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1554                 hfa384x_events_only_cmd(dev);
1555         else
1556                 prism2_clear_cmd_queue(local);
1557 }
1558
1559
1560 static void prism2_hw_reset(struct net_device *dev)
1561 {
1562         struct hostap_interface *iface;
1563         local_info_t *local;
1564
1565 #if 0
1566         static long last_reset = 0;
1567
1568         /* do not reset card more than once per second to avoid ending up in a
1569          * busy loop reseting the card */
1570         if (time_before_eq(jiffies, last_reset + HZ))
1571                 return;
1572         last_reset = jiffies;
1573 #endif
1574
1575         iface = netdev_priv(dev);
1576         local = iface->local;
1577
1578         if (in_interrupt()) {
1579                 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1580                        "in interrupt context\n", dev->name);
1581                 return;
1582         }
1583
1584         if (local->hw_downloading)
1585                 return;
1586
1587         if (local->hw_resetting) {
1588                 printk(KERN_WARNING "%s: %s: already resetting card - "
1589                        "ignoring reset request\n", dev_info, dev->name);
1590                 return;
1591         }
1592
1593         local->hw_reset_tries++;
1594         if (local->hw_reset_tries > 10) {
1595                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1596                        dev->name);
1597                 return;
1598         }
1599
1600         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1601         hfa384x_disable_interrupts(dev);
1602         local->hw_resetting = 1;
1603         if (local->func->cor_sreset) {
1604                 /* Host system seems to hang in some cases with high traffic
1605                  * load or shared interrupts during COR sreset. Disable shared
1606                  * interrupts during reset to avoid these crashes. COS sreset
1607                  * takes quite a long time, so it is unfortunate that this
1608                  * seems to be needed. Anyway, I do not know of any better way
1609                  * of avoiding the crash. */
1610                 disable_irq(dev->irq);
1611                 local->func->cor_sreset(local);
1612                 enable_irq(dev->irq);
1613         }
1614         prism2_hw_shutdown(dev, 1);
1615         prism2_hw_config(dev, 0);
1616         local->hw_resetting = 0;
1617
1618 #ifdef PRISM2_DOWNLOAD_SUPPORT
1619         if (local->dl_pri) {
1620                 printk(KERN_DEBUG "%s: persistent download of primary "
1621                        "firmware\n", dev->name);
1622                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1623                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1624                                dev->name);
1625         }
1626
1627         if (local->dl_sec) {
1628                 printk(KERN_DEBUG "%s: persistent download of secondary "
1629                        "firmware\n", dev->name);
1630                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1631                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1632                                dev->name);
1633         }
1634 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1635
1636         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1637 }
1638
1639
1640 static void prism2_schedule_reset(local_info_t *local)
1641 {
1642         schedule_work(&local->reset_queue);
1643 }
1644
1645
1646 /* Called only as scheduled task after noticing card timeout in interrupt
1647  * context */
1648 static void handle_reset_queue(struct work_struct *work)
1649 {
1650         local_info_t *local = container_of(work, local_info_t, reset_queue);
1651
1652         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1653         prism2_hw_reset(local->dev);
1654
1655         if (netif_queue_stopped(local->dev)) {
1656                 int i;
1657
1658                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1659                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1660                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1661                                        "wake up queue\n");
1662                                 netif_wake_queue(local->dev);
1663                                 break;
1664                         }
1665         }
1666 }
1667
1668
1669 static int prism2_get_txfid_idx(local_info_t *local)
1670 {
1671         int idx, end;
1672         unsigned long flags;
1673
1674         spin_lock_irqsave(&local->txfidlock, flags);
1675         end = idx = local->next_txfid;
1676         do {
1677                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1678                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1679                         spin_unlock_irqrestore(&local->txfidlock, flags);
1680                         return idx;
1681                 }
1682                 idx++;
1683                 if (idx >= PRISM2_TXFID_COUNT)
1684                         idx = 0;
1685         } while (idx != end);
1686         spin_unlock_irqrestore(&local->txfidlock, flags);
1687
1688         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1689                "packet dropped\n");
1690         local->stats.tx_dropped++;
1691
1692         return -1;
1693 }
1694
1695
1696 /* Called only from hardware IRQ */
1697 static void prism2_transmit_cb(struct net_device *dev, long context,
1698                                u16 resp0, u16 res)
1699 {
1700         struct hostap_interface *iface;
1701         local_info_t *local;
1702         int idx = (int) context;
1703
1704         iface = netdev_priv(dev);
1705         local = iface->local;
1706
1707         if (res) {
1708                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1709                        dev->name, res);
1710                 return;
1711         }
1712
1713         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1714                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1715                        "idx=%d\n", dev->name, idx);
1716                 return;
1717         }
1718
1719         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1720                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1721                        "with no pending transmit\n", dev->name);
1722         }
1723
1724         if (netif_queue_stopped(dev)) {
1725                 /* ready for next TX, so wake up queue that was stopped in
1726                  * prism2_transmit() */
1727                 netif_wake_queue(dev);
1728         }
1729
1730         spin_lock(&local->txfidlock);
1731
1732         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1733          * will be automatically allocated for the next TX frame */
1734         local->intransmitfid[idx] = resp0;
1735
1736         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1737                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1738                dev->name, idx, local->txfid[idx],
1739                resp0, local->intransmitfid[local->next_txfid]);
1740
1741         idx++;
1742         if (idx >= PRISM2_TXFID_COUNT)
1743                 idx = 0;
1744         local->next_txfid = idx;
1745
1746         /* check if all TX buffers are occupied */
1747         do {
1748                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1749                         spin_unlock(&local->txfidlock);
1750                         return;
1751                 }
1752                 idx++;
1753                 if (idx >= PRISM2_TXFID_COUNT)
1754                         idx = 0;
1755         } while (idx != local->next_txfid);
1756         spin_unlock(&local->txfidlock);
1757
1758         /* no empty TX buffers, stop queue */
1759         netif_stop_queue(dev);
1760 }
1761
1762
1763 /* Called only from software IRQ if PCI bus master is not used (with bus master
1764  * this can be called both from software and hardware IRQ) */
1765 static int prism2_transmit(struct net_device *dev, int idx)
1766 {
1767         struct hostap_interface *iface;
1768         local_info_t *local;
1769         int res;
1770
1771         iface = netdev_priv(dev);
1772         local = iface->local;
1773
1774         /* The driver tries to stop netif queue so that there would not be
1775          * more than one attempt to transmit frames going on; check that this
1776          * is really the case */
1777
1778         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1779                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1780                        "when previous TX was pending\n", dev->name);
1781                 return -1;
1782         }
1783
1784         /* stop the queue for the time that transmit is pending */
1785         netif_stop_queue(dev);
1786
1787         /* transmit packet */
1788         res = hfa384x_cmd_callback(
1789                 dev,
1790                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1791                 local->txfid[idx],
1792                 prism2_transmit_cb, (long) idx);
1793
1794         if (res) {
1795                 struct net_device_stats *stats;
1796                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1797                        "failed (res=%d)\n", dev->name, res);
1798                 stats = hostap_get_stats(dev);
1799                 stats->tx_dropped++;
1800                 netif_wake_queue(dev);
1801                 return -1;
1802         }
1803         dev->trans_start = jiffies;
1804
1805         /* Since we did not wait for command completion, the card continues
1806          * to process on the background and we will finish handling when
1807          * command completion event is handled (prism2_cmd_ev() function) */
1808
1809         return 0;
1810 }
1811
1812
1813 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1814  * send the payload with this descriptor) */
1815 /* Called only from software IRQ */
1816 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1817 {
1818         struct hostap_interface *iface;
1819         local_info_t *local;
1820         struct hfa384x_tx_frame txdesc;
1821         struct hostap_skb_tx_data *meta;
1822         int hdr_len, data_len, idx, res, ret = -1;
1823         u16 tx_control, fc;
1824
1825         iface = netdev_priv(dev);
1826         local = iface->local;
1827
1828         meta = (struct hostap_skb_tx_data *) skb->cb;
1829
1830         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1831
1832         if ((local->func->card_present && !local->func->card_present(local)) ||
1833             !local->hw_ready || local->hw_downloading || local->pri_only) {
1834                 if (net_ratelimit()) {
1835                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1836                                " skipping\n", dev->name);
1837                 }
1838                 goto fail;
1839         }
1840
1841         memset(&txdesc, 0, sizeof(txdesc));
1842
1843         /* skb->data starts with txdesc->frame_control */
1844         hdr_len = 24;
1845         memcpy(&txdesc.frame_control, skb->data, hdr_len);
1846         fc = le16_to_cpu(txdesc.frame_control);
1847         if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
1848             (fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS) &&
1849             skb->len >= 30) {
1850                 /* Addr4 */
1851                 memcpy(txdesc.addr4, skb->data + hdr_len, ETH_ALEN);
1852                 hdr_len += ETH_ALEN;
1853         }
1854
1855         tx_control = local->tx_control;
1856         if (meta->tx_cb_idx) {
1857                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1858                 txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
1859         }
1860         txdesc.tx_control = cpu_to_le16(tx_control);
1861         txdesc.tx_rate = meta->rate;
1862
1863         data_len = skb->len - hdr_len;
1864         txdesc.data_len = cpu_to_le16(data_len);
1865         txdesc.len = cpu_to_be16(data_len);
1866
1867         idx = prism2_get_txfid_idx(local);
1868         if (idx < 0)
1869                 goto fail;
1870
1871         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1872                 hostap_dump_tx_header(dev->name, &txdesc);
1873
1874         spin_lock(&local->baplock);
1875         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1876
1877         if (!res)
1878                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1879         if (!res)
1880                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1881                                      skb->len - hdr_len);
1882         spin_unlock(&local->baplock);
1883
1884         if (!res)
1885                 res = prism2_transmit(dev, idx);
1886         if (res) {
1887                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1888                        dev->name);
1889                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1890                 schedule_work(&local->reset_queue);
1891                 goto fail;
1892         }
1893
1894         ret = 0;
1895
1896 fail:
1897         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1898         return ret;
1899 }
1900
1901
1902 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1903  * register has changed values between consecutive reads for an unknown reason.
1904  * This should really not happen, so more debugging is needed. This test
1905  * version is a big slower, but it will detect most of such register changes
1906  * and will try to get the correct fid eventually. */
1907 #define EXTRA_FID_READ_TESTS
1908
1909 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1910 {
1911 #ifdef EXTRA_FID_READ_TESTS
1912         u16 val, val2, val3;
1913         int i;
1914
1915         for (i = 0; i < 10; i++) {
1916                 val = HFA384X_INW(reg);
1917                 val2 = HFA384X_INW(reg);
1918                 val3 = HFA384X_INW(reg);
1919
1920                 if (val == val2 && val == val3)
1921                         return val;
1922
1923                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1924                        " %04x %04x %04x\n",
1925                        dev->name, i, reg, val, val2, val3);
1926                 if ((val == val2 || val == val3) && val != 0)
1927                         return val;
1928                 if (val2 == val3 && val2 != 0)
1929                         return val2;
1930         }
1931         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1932                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1933         return val;
1934 #else /* EXTRA_FID_READ_TESTS */
1935         return HFA384X_INW(reg);
1936 #endif /* EXTRA_FID_READ_TESTS */
1937 }
1938
1939
1940 /* Called only as a tasklet (software IRQ) */
1941 static void prism2_rx(local_info_t *local)
1942 {
1943         struct net_device *dev = local->dev;
1944         int res, rx_pending = 0;
1945         u16 len, hdr_len, rxfid, status, macport;
1946         struct net_device_stats *stats;
1947         struct hfa384x_rx_frame rxdesc;
1948         struct sk_buff *skb = NULL;
1949
1950         prism2_callback(local, PRISM2_CALLBACK_RX_START);
1951         stats = hostap_get_stats(dev);
1952
1953         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1954 #ifndef final_version
1955         if (rxfid == 0) {
1956                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1957                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1958                        rxfid);
1959                 if (rxfid == 0) {
1960                         schedule_work(&local->reset_queue);
1961                         goto rx_dropped;
1962                 }
1963                 /* try to continue with the new rxfid value */
1964         }
1965 #endif
1966
1967         spin_lock(&local->baplock);
1968         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1969         if (!res)
1970                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1971
1972         if (res) {
1973                 spin_unlock(&local->baplock);
1974                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1975                        res);
1976                 if (res == -ETIMEDOUT) {
1977                         schedule_work(&local->reset_queue);
1978                 }
1979                 goto rx_dropped;
1980         }
1981
1982         len = le16_to_cpu(rxdesc.data_len);
1983         hdr_len = sizeof(rxdesc);
1984         status = le16_to_cpu(rxdesc.status);
1985         macport = (status >> 8) & 0x07;
1986
1987         /* Drop frames with too large reported payload length. Monitor mode
1988          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1989          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1990          * macport 7 */
1991         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1992                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1993                         if (len >= (u16) -14) {
1994                                 hdr_len -= 65535 - len;
1995                                 hdr_len--;
1996                         }
1997                         len = 0;
1998                 } else {
1999                         spin_unlock(&local->baplock);
2000                         printk(KERN_DEBUG "%s: Received frame with invalid "
2001                                "length 0x%04x\n", dev->name, len);
2002                         hostap_dump_rx_header(dev->name, &rxdesc);
2003                         goto rx_dropped;
2004                 }
2005         }
2006
2007         skb = dev_alloc_skb(len + hdr_len);
2008         if (!skb) {
2009                 spin_unlock(&local->baplock);
2010                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2011                        dev->name);
2012                 goto rx_dropped;
2013         }
2014         skb->dev = dev;
2015         memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2016
2017         if (len > 0)
2018                 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2019         spin_unlock(&local->baplock);
2020         if (res) {
2021                 printk(KERN_DEBUG "%s: RX failed to read "
2022                        "frame data\n", dev->name);
2023                 goto rx_dropped;
2024         }
2025
2026         skb_queue_tail(&local->rx_list, skb);
2027         tasklet_schedule(&local->rx_tasklet);
2028
2029  rx_exit:
2030         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2031         if (!rx_pending) {
2032                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2033         }
2034
2035         return;
2036
2037  rx_dropped:
2038         stats->rx_dropped++;
2039         if (skb)
2040                 dev_kfree_skb(skb);
2041         goto rx_exit;
2042 }
2043
2044
2045 /* Called only as a tasklet (software IRQ) */
2046 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2047 {
2048         struct hfa384x_rx_frame *rxdesc;
2049         struct net_device *dev = skb->dev;
2050         struct hostap_80211_rx_status stats;
2051         int hdrlen, rx_hdrlen;
2052
2053         rx_hdrlen = sizeof(*rxdesc);
2054         if (skb->len < sizeof(*rxdesc)) {
2055                 /* Allow monitor mode to receive shorter frames */
2056                 if (local->iw_mode == IW_MODE_MONITOR &&
2057                     skb->len >= sizeof(*rxdesc) - 30) {
2058                         rx_hdrlen = skb->len;
2059                 } else {
2060                         dev_kfree_skb(skb);
2061                         return;
2062                 }
2063         }
2064
2065         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2066
2067         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2068             skb->len >= sizeof(*rxdesc))
2069                 hostap_dump_rx_header(dev->name, rxdesc);
2070
2071         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2072             (!local->monitor_allow_fcserr ||
2073              local->iw_mode != IW_MODE_MONITOR))
2074                 goto drop;
2075
2076         if (skb->len > PRISM2_DATA_MAXLEN) {
2077                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2078                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2079                 goto drop;
2080         }
2081
2082         stats.mac_time = le32_to_cpu(rxdesc->time);
2083         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2084         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2085         stats.rate = rxdesc->rate;
2086
2087         /* Convert Prism2 RX structure into IEEE 802.11 header */
2088         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
2089         if (hdrlen > rx_hdrlen)
2090                 hdrlen = rx_hdrlen;
2091
2092         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2093                 &rxdesc->frame_control, hdrlen);
2094
2095         hostap_80211_rx(dev, skb, &stats);
2096         return;
2097
2098  drop:
2099         dev_kfree_skb(skb);
2100 }
2101
2102
2103 /* Called only as a tasklet (software IRQ) */
2104 static void hostap_rx_tasklet(unsigned long data)
2105 {
2106         local_info_t *local = (local_info_t *) data;
2107         struct sk_buff *skb;
2108
2109         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2110                 hostap_rx_skb(local, skb);
2111 }
2112
2113
2114 /* Called only from hardware IRQ */
2115 static void prism2_alloc_ev(struct net_device *dev)
2116 {
2117         struct hostap_interface *iface;
2118         local_info_t *local;
2119         int idx;
2120         u16 fid;
2121
2122         iface = netdev_priv(dev);
2123         local = iface->local;
2124
2125         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2126
2127         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2128
2129         spin_lock(&local->txfidlock);
2130         idx = local->next_alloc;
2131
2132         do {
2133                 if (local->txfid[idx] == fid) {
2134                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2135                                idx);
2136
2137 #ifndef final_version
2138                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2139                                 printk("Already released txfid found at idx "
2140                                        "%d\n", idx);
2141                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2142                                 printk("Already reserved txfid found at idx "
2143                                        "%d\n", idx);
2144 #endif
2145                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2146                         idx++;
2147                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2148                                 idx;
2149
2150                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2151                             netif_queue_stopped(dev))
2152                                 netif_wake_queue(dev);
2153
2154                         spin_unlock(&local->txfidlock);
2155                         return;
2156                 }
2157
2158                 idx++;
2159                 if (idx >= PRISM2_TXFID_COUNT)
2160                         idx = 0;
2161         } while (idx != local->next_alloc);
2162
2163         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2164                "read 0x%04x) for alloc event\n", dev->name, fid,
2165                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2166         printk(KERN_DEBUG "TXFIDs:");
2167         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2168                 printk(" %04x[%04x]", local->txfid[idx],
2169                        local->intransmitfid[idx]);
2170         printk("\n");
2171         spin_unlock(&local->txfidlock);
2172
2173         /* FIX: should probably schedule reset; reference to one txfid was lost
2174          * completely.. Bad things will happen if we run out of txfids
2175          * Actually, this will cause netdev watchdog to notice TX timeout and
2176          * then card reset after all txfids have been leaked. */
2177 }
2178
2179
2180 /* Called only as a tasklet (software IRQ) */
2181 static void hostap_tx_callback(local_info_t *local,
2182                                struct hfa384x_tx_frame *txdesc, int ok,
2183                                char *payload)
2184 {
2185         u16 sw_support, hdrlen, len;
2186         struct sk_buff *skb;
2187         struct hostap_tx_callback_info *cb;
2188
2189         /* Make sure that frame was from us. */
2190         if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2191                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2192                        local->dev->name);
2193                 return;
2194         }
2195
2196         sw_support = le16_to_cpu(txdesc->sw_support);
2197
2198         spin_lock(&local->lock);
2199         cb = local->tx_callback;
2200         while (cb != NULL && cb->idx != sw_support)
2201                 cb = cb->next;
2202         spin_unlock(&local->lock);
2203
2204         if (cb == NULL) {
2205                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2206                        local->dev->name, sw_support);
2207                 return;
2208         }
2209
2210         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
2211         len = le16_to_cpu(txdesc->data_len);
2212         skb = dev_alloc_skb(hdrlen + len);
2213         if (skb == NULL) {
2214                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2215                        "skb\n", local->dev->name);
2216                 return;
2217         }
2218
2219         memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2220         if (payload)
2221                 memcpy(skb_put(skb, len), payload, len);
2222
2223         skb->dev = local->dev;
2224         skb->mac.raw = skb->data;
2225
2226         cb->func(skb, ok, cb->data);
2227 }
2228
2229
2230 /* Called only as a tasklet (software IRQ) */
2231 static int hostap_tx_compl_read(local_info_t *local, int error,
2232                                 struct hfa384x_tx_frame *txdesc,
2233                                 char **payload)
2234 {
2235         u16 fid, len;
2236         int res, ret = 0;
2237         struct net_device *dev = local->dev;
2238
2239         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2240
2241         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2242
2243         spin_lock(&local->baplock);
2244         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2245         if (!res)
2246                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2247         if (res) {
2248                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2249                        "read txdesc\n", dev->name, error, fid);
2250                 if (res == -ETIMEDOUT) {
2251                         schedule_work(&local->reset_queue);
2252                 }
2253                 ret = -1;
2254                 goto fail;
2255         }
2256         if (txdesc->sw_support) {
2257                 len = le16_to_cpu(txdesc->data_len);
2258                 if (len < PRISM2_DATA_MAXLEN) {
2259                         *payload = (char *) kmalloc(len, GFP_ATOMIC);
2260                         if (*payload == NULL ||
2261                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2262                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2263                                        "frame payload\n", dev->name);
2264                                 kfree(*payload);
2265                                 *payload = NULL;
2266                                 ret = -1;
2267                                 goto fail;
2268                         }
2269                 }
2270         }
2271
2272  fail:
2273         spin_unlock(&local->baplock);
2274
2275         return ret;
2276 }
2277
2278
2279 /* Called only as a tasklet (software IRQ) */
2280 static void prism2_tx_ev(local_info_t *local)
2281 {
2282         struct net_device *dev = local->dev;
2283         char *payload = NULL;
2284         struct hfa384x_tx_frame txdesc;
2285
2286         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2287                 goto fail;
2288
2289         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2290                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2291                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2292                        "duration_id=%d\n",
2293                        dev->name, le16_to_cpu(txdesc.status),
2294                        txdesc.retry_count, txdesc.tx_rate,
2295                        le16_to_cpu(txdesc.seq_ctrl),
2296                        le16_to_cpu(txdesc.duration_id));
2297         }
2298
2299         if (txdesc.sw_support)
2300                 hostap_tx_callback(local, &txdesc, 1, payload);
2301         kfree(payload);
2302
2303  fail:
2304         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2305 }
2306
2307
2308 /* Called only as a tasklet (software IRQ) */
2309 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2310 {
2311         local_info_t *local = (local_info_t *) data;
2312         struct sk_buff *skb;
2313
2314         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2315                 struct hfa384x_tx_frame *txdesc =
2316                         (struct hfa384x_tx_frame *) skb->data;
2317
2318                 if (skb->len >= sizeof(*txdesc)) {
2319                         /* Convert Prism2 RX structure into IEEE 802.11 header
2320                          */
2321                         u16 fc = le16_to_cpu(txdesc->frame_control);
2322                         int hdrlen = hostap_80211_get_hdrlen(fc);
2323                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2324                                 &txdesc->frame_control, hdrlen);
2325
2326                         hostap_handle_sta_tx_exc(local, skb);
2327                 }
2328                 dev_kfree_skb(skb);
2329         }
2330 }
2331
2332
2333 /* Called only as a tasklet (software IRQ) */
2334 static void prism2_txexc(local_info_t *local)
2335 {
2336         struct net_device *dev = local->dev;
2337         u16 status, fc;
2338         int show_dump, res;
2339         char *payload = NULL;
2340         struct hfa384x_tx_frame txdesc;
2341
2342         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2343         local->stats.tx_errors++;
2344
2345         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2346         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2347         if (res)
2348                 return;
2349
2350         status = le16_to_cpu(txdesc.status);
2351
2352         /* We produce a TXDROP event only for retry or lifetime
2353          * exceeded, because that's the only status that really mean
2354          * that this particular node went away.
2355          * Other errors means that *we* screwed up. - Jean II */
2356         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2357         {
2358                 union iwreq_data wrqu;
2359
2360                 /* Copy 802.11 dest address. */
2361                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2362                 wrqu.addr.sa_family = ARPHRD_ETHER;
2363                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2364         } else
2365                 show_dump = 1;
2366
2367         if (local->iw_mode == IW_MODE_MASTER ||
2368             local->iw_mode == IW_MODE_REPEAT ||
2369             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2370                 struct sk_buff *skb;
2371                 skb = dev_alloc_skb(sizeof(txdesc));
2372                 if (skb) {
2373                         memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2374                                sizeof(txdesc));
2375                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2376                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2377                 }
2378         }
2379
2380         if (txdesc.sw_support)
2381                 hostap_tx_callback(local, &txdesc, 0, payload);
2382         kfree(payload);
2383
2384         if (!show_dump)
2385                 return;
2386
2387         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2388                " tx_control=%04x\n",
2389                dev->name, status,
2390                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2391                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2392                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2393                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2394                le16_to_cpu(txdesc.tx_control));
2395
2396         fc = le16_to_cpu(txdesc.frame_control);
2397         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2398                "(%s%s%s::%d%s%s)\n",
2399                txdesc.retry_count, txdesc.tx_rate, fc,
2400                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT ? "Mgmt" : "",
2401                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL ? "Ctrl" : "",
2402                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA ? "Data" : "",
2403                WLAN_FC_GET_STYPE(fc) >> 4,
2404                fc & IEEE80211_FCTL_TODS ? " ToDS" : "",
2405                fc & IEEE80211_FCTL_FROMDS ? " FromDS" : "");
2406         PDEBUG(DEBUG_EXTRA, "   A1=" MACSTR " A2=" MACSTR " A3="
2407                MACSTR " A4=" MACSTR "\n",
2408                MAC2STR(txdesc.addr1), MAC2STR(txdesc.addr2),
2409                MAC2STR(txdesc.addr3), MAC2STR(txdesc.addr4));
2410 }
2411
2412
2413 /* Called only as a tasklet (software IRQ) */
2414 static void hostap_info_tasklet(unsigned long data)
2415 {
2416         local_info_t *local = (local_info_t *) data;
2417         struct sk_buff *skb;
2418
2419         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2420                 hostap_info_process(local, skb);
2421                 dev_kfree_skb(skb);
2422         }
2423 }
2424
2425
2426 /* Called only as a tasklet (software IRQ) */
2427 static void prism2_info(local_info_t *local)
2428 {
2429         struct net_device *dev = local->dev;
2430         u16 fid;
2431         int res, left;
2432         struct hfa384x_info_frame info;
2433         struct sk_buff *skb;
2434
2435         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2436
2437         spin_lock(&local->baplock);
2438         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2439         if (!res)
2440                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2441         if (res) {
2442                 spin_unlock(&local->baplock);
2443                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2444                        fid);
2445                 if (res == -ETIMEDOUT) {
2446                         schedule_work(&local->reset_queue);
2447                 }
2448                 goto out;
2449         }
2450
2451         le16_to_cpus(&info.len);
2452         le16_to_cpus(&info.type);
2453         left = (info.len - 1) * 2;
2454
2455         if (info.len & 0x8000 || info.len == 0 || left > 2060) {
2456                 /* data register seems to give 0x8000 in some error cases even
2457                  * though busy bit is not set in offset register;
2458                  * in addition, length must be at least 1 due to type field */
2459                 spin_unlock(&local->baplock);
2460                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2461                        "length 0x%04x (type 0x%04x)\n", dev->name, info.len,
2462                        info.type);
2463                 goto out;
2464         }
2465
2466         skb = dev_alloc_skb(sizeof(info) + left);
2467         if (skb == NULL) {
2468                 spin_unlock(&local->baplock);
2469                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2470                        "frame\n", dev->name);
2471                 goto out;
2472         }
2473
2474         memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2475         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2476         {
2477                 spin_unlock(&local->baplock);
2478                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2479                        "len=0x%04x, type=0x%04x\n",
2480                        dev->name, fid, info.len, info.type);
2481                 dev_kfree_skb(skb);
2482                 goto out;
2483         }
2484         spin_unlock(&local->baplock);
2485
2486         skb_queue_tail(&local->info_list, skb);
2487         tasklet_schedule(&local->info_tasklet);
2488
2489  out:
2490         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2491 }
2492
2493
2494 /* Called only as a tasklet (software IRQ) */
2495 static void hostap_bap_tasklet(unsigned long data)
2496 {
2497         local_info_t *local = (local_info_t *) data;
2498         struct net_device *dev = local->dev;
2499         u16 ev;
2500         int frames = 30;
2501
2502         if (local->func->card_present && !local->func->card_present(local))
2503                 return;
2504
2505         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2506
2507         /* Process all pending BAP events without generating new interrupts
2508          * for them */
2509         while (frames-- > 0) {
2510                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2511                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2512                         break;
2513                 if (ev & HFA384X_EV_RX)
2514                         prism2_rx(local);
2515                 if (ev & HFA384X_EV_INFO)
2516                         prism2_info(local);
2517                 if (ev & HFA384X_EV_TX)
2518                         prism2_tx_ev(local);
2519                 if (ev & HFA384X_EV_TXEXC)
2520                         prism2_txexc(local);
2521         }
2522
2523         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2524         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2525
2526         /* Enable interrupts for new BAP events */
2527         hfa384x_events_all(dev);
2528         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2529 }
2530
2531
2532 /* Called only from hardware IRQ */
2533 static void prism2_infdrop(struct net_device *dev)
2534 {
2535         static unsigned long last_inquire = 0;
2536
2537         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2538
2539         /* some firmware versions seem to get stuck with
2540          * full CommTallies in high traffic load cases; every
2541          * packet will then cause INFDROP event and CommTallies
2542          * info frame will not be sent automatically. Try to
2543          * get out of this state by inquiring CommTallies. */
2544         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2545                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2546                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2547                 last_inquire = jiffies;
2548         }
2549 }
2550
2551
2552 /* Called only from hardware IRQ */
2553 static void prism2_ev_tick(struct net_device *dev)
2554 {
2555         struct hostap_interface *iface;
2556         local_info_t *local;
2557         u16 evstat, inten;
2558         static int prev_stuck = 0;
2559
2560         iface = netdev_priv(dev);
2561         local = iface->local;
2562
2563         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2564             local->last_tick_timer) {
2565                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2566                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2567                 if (!prev_stuck) {
2568                         printk(KERN_INFO "%s: SW TICK stuck? "
2569                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2570                                dev->name, local->bits, evstat, inten);
2571                 }
2572                 local->sw_tick_stuck++;
2573                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2574                     (inten & HFA384X_BAP0_EVENTS)) {
2575                         printk(KERN_INFO "%s: trying to recover from IRQ "
2576                                "hang\n", dev->name);
2577                         hfa384x_events_no_bap0(dev);
2578                 }
2579                 prev_stuck = 1;
2580         } else
2581                 prev_stuck = 0;
2582 }
2583
2584
2585 /* Called only from hardware IRQ */
2586 static void prism2_check_magic(local_info_t *local)
2587 {
2588         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2589          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2590          * register once or twice seems to get the correct value.. PCI cards
2591          * cannot anyway be removed during normal operation, so there is not
2592          * really any need for this verification with them. */
2593
2594 #ifndef PRISM2_PCI
2595 #ifndef final_version
2596         static unsigned long last_magic_err = 0;
2597         struct net_device *dev = local->dev;
2598
2599         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2600                 if (!local->hw_ready)
2601                         return;
2602                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2603                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2604                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2605                                "%04X != %04X - card removed?\n", dev->name,
2606                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2607                                HFA384X_MAGIC);
2608                         last_magic_err = jiffies;
2609                 } else if (net_ratelimit()) {
2610                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2611                                "MAGIC=%04x\n", dev->name,
2612                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2613                                HFA384X_MAGIC);
2614                 }
2615                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2616                         schedule_work(&local->reset_queue);
2617                 return;
2618         }
2619 #endif /* final_version */
2620 #endif /* !PRISM2_PCI */
2621 }
2622
2623
2624 /* Called only from hardware IRQ */
2625 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2626 {
2627         struct net_device *dev = (struct net_device *) dev_id;
2628         struct hostap_interface *iface;
2629         local_info_t *local;
2630         int events = 0;
2631         u16 ev;
2632
2633         iface = netdev_priv(dev);
2634         local = iface->local;
2635
2636         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2637
2638         if (local->func->card_present && !local->func->card_present(local)) {
2639                 if (net_ratelimit()) {
2640                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2641                                dev->name);
2642                 }
2643                 return IRQ_HANDLED;
2644         }
2645
2646         prism2_check_magic(local);
2647
2648         for (;;) {
2649                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2650                 if (ev == 0xffff) {
2651                         if (local->shutdown)
2652                                 return IRQ_HANDLED;
2653                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2654                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2655                                dev->name);
2656                         return IRQ_HANDLED;
2657                 }
2658
2659                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2660                 if (ev == 0)
2661                         break;
2662
2663                 if (ev & HFA384X_EV_CMD) {
2664                         prism2_cmd_ev(dev);
2665                 }
2666
2667                 /* Above events are needed even before hw is ready, but other
2668                  * events should be skipped during initialization. This may
2669                  * change for AllocEv if allocate_fid is implemented without
2670                  * busy waiting. */
2671                 if (!local->hw_ready || local->hw_resetting ||
2672                     !local->dev_enabled) {
2673                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2674                         if (ev & HFA384X_EV_CMD)
2675                                 goto next_event;
2676                         if ((ev & HFA384X_EVENT_MASK) == 0)
2677                                 return IRQ_HANDLED;
2678                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2679                             net_ratelimit()) {
2680                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2681                                        "not ready; skipping events 0x%04x "
2682                                        "(IntEn=0x%04x)%s%s%s\n",
2683                                        dev->name, ev,
2684                                        HFA384X_INW(HFA384X_INTEN_OFF),
2685                                        !local->hw_ready ? " (!hw_ready)" : "",
2686                                        local->hw_resetting ?
2687                                        " (hw_resetting)" : "",
2688                                        !local->dev_enabled ?
2689                                        " (!dev_enabled)" : "");
2690                         }
2691                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2692                         return IRQ_HANDLED;
2693                 }
2694
2695                 if (ev & HFA384X_EV_TICK) {
2696                         prism2_ev_tick(dev);
2697                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2698                 }
2699
2700                 if (ev & HFA384X_EV_ALLOC) {
2701                         prism2_alloc_ev(dev);
2702                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2703                 }
2704
2705                 /* Reading data from the card is quite time consuming, so do it
2706                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2707                  * and unmasked after needed data has been read completely. */
2708                 if (ev & HFA384X_BAP0_EVENTS) {
2709                         hfa384x_events_no_bap0(dev);
2710                         tasklet_schedule(&local->bap_tasklet);
2711                 }
2712
2713 #ifndef final_version
2714                 if (ev & HFA384X_EV_WTERR) {
2715                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2716                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2717                 }
2718 #endif /* final_version */
2719
2720                 if (ev & HFA384X_EV_INFDROP) {
2721                         prism2_infdrop(dev);
2722                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2723                 }
2724
2725         next_event:
2726                 events++;
2727                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2728                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2729                                "(EvStat=0x%04x)\n",
2730                                PRISM2_MAX_INTERRUPT_EVENTS,
2731                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2732                         break;
2733                 }
2734         }
2735         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2736         return IRQ_RETVAL(events);
2737 }
2738
2739
2740 static void prism2_check_sta_fw_version(local_info_t *local)
2741 {
2742         struct hfa384x_comp_ident comp;
2743         int id, variant, major, minor;
2744
2745         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2746                             &comp, sizeof(comp), 1) < 0)
2747                 return;
2748
2749         local->fw_ap = 0;
2750         id = le16_to_cpu(comp.id);
2751         if (id != HFA384X_COMP_ID_STA) {
2752                 if (id == HFA384X_COMP_ID_FW_AP)
2753                         local->fw_ap = 1;
2754                 return;
2755         }
2756
2757         major = __le16_to_cpu(comp.major);
2758         minor = __le16_to_cpu(comp.minor);
2759         variant = __le16_to_cpu(comp.variant);
2760         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2761
2762         /* Station firmware versions before 1.4.x seem to have a bug in
2763          * firmware-based WEP encryption when using Host AP mode, so use
2764          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2765          * first one that has been seen to produce correct encryption, but the
2766          * bug might be fixed before that (although, at least 1.4.2 is broken).
2767          */
2768         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2769
2770         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2771             !local->fw_encrypt_ok) {
2772                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2773                        "a workaround for firmware bug in Host AP mode WEP\n",
2774                        local->dev->name);
2775                 local->host_encrypt = 1;
2776         }
2777
2778         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2779          * in station firmware versions before 1.5.x. With these versions, the
2780          * driver uses a workaround with bogus frame format (4th address after
2781          * the payload). This is not compatible with other AP devices. Since
2782          * the firmware bug is fixed in the latest station firmware versions,
2783          * automatically enable standard compliant mode for cards using station
2784          * firmware version 1.5.0 or newer. */
2785         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2786                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2787         else {
2788                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2789                        "workaround for firmware bug in Host AP mode WDS\n",
2790                        local->dev->name);
2791         }
2792
2793         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2794 }
2795
2796
2797 static void prism2_crypt_deinit_entries(local_info_t *local, int force)
2798 {
2799         struct list_head *ptr, *n;
2800         struct ieee80211_crypt_data *entry;
2801
2802         for (ptr = local->crypt_deinit_list.next, n = ptr->next;
2803              ptr != &local->crypt_deinit_list; ptr = n, n = ptr->next) {
2804                 entry = list_entry(ptr, struct ieee80211_crypt_data, list);
2805
2806                 if (atomic_read(&entry->refcnt) != 0 && !force)
2807                         continue;
2808
2809                 list_del(ptr);
2810
2811                 if (entry->ops)
2812                         entry->ops->deinit(entry->priv);
2813                 kfree(entry);
2814         }
2815 }
2816
2817
2818 static void prism2_crypt_deinit_handler(unsigned long data)
2819 {
2820         local_info_t *local = (local_info_t *) data;
2821         unsigned long flags;
2822
2823         spin_lock_irqsave(&local->lock, flags);
2824         prism2_crypt_deinit_entries(local, 0);
2825         if (!list_empty(&local->crypt_deinit_list)) {
2826                 printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
2827                        "deletion list\n", local->dev->name);
2828                 local->crypt_deinit_timer.expires = jiffies + HZ;
2829                 add_timer(&local->crypt_deinit_timer);
2830         }
2831         spin_unlock_irqrestore(&local->lock, flags);
2832
2833 }
2834
2835
2836 static void hostap_passive_scan(unsigned long data)
2837 {
2838         local_info_t *local = (local_info_t *) data;
2839         struct net_device *dev = local->dev;
2840         u16 channel;
2841
2842         if (local->passive_scan_interval <= 0)
2843                 return;
2844
2845         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2846                 int max_tries = 16;
2847
2848                 /* Even though host system does not really know when the WLAN
2849                  * MAC is sending frames, try to avoid changing channels for
2850                  * passive scanning when a host-generated frame is being
2851                  * transmitted */
2852                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2853                         printk(KERN_DEBUG "%s: passive scan detected pending "
2854                                "TX - delaying\n", dev->name);
2855                         local->passive_scan_timer.expires = jiffies + HZ / 10;
2856                         add_timer(&local->passive_scan_timer);
2857                         return;
2858                 }
2859
2860                 do {
2861                         local->passive_scan_channel++;
2862                         if (local->passive_scan_channel > 14)
2863                                 local->passive_scan_channel = 1;
2864                         max_tries--;
2865                 } while (!(local->channel_mask &
2866                            (1 << (local->passive_scan_channel - 1))) &&
2867                          max_tries > 0);
2868
2869                 if (max_tries == 0) {
2870                         printk(KERN_INFO "%s: no allowed passive scan channels"
2871                                " found\n", dev->name);
2872                         return;
2873                 }
2874
2875                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2876                        dev->name, local->passive_scan_channel);
2877                 channel = local->passive_scan_channel;
2878                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2879                 local->passive_scan_timer.expires = jiffies + HZ / 10;
2880         } else {
2881                 channel = local->channel;
2882                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2883                 local->passive_scan_timer.expires = jiffies +
2884                         local->passive_scan_interval * HZ;
2885         }
2886
2887         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2888                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
2889                                  channel, NULL, 0))
2890                 printk(KERN_ERR "%s: passive scan channel set %d "
2891                        "failed\n", dev->name, channel);
2892
2893         add_timer(&local->passive_scan_timer);
2894 }
2895
2896
2897 /* Called only as a scheduled task when communications quality values should
2898  * be updated. */
2899 static void handle_comms_qual_update(struct work_struct *work)
2900 {
2901         local_info_t *local =
2902                 container_of(work, local_info_t, comms_qual_update);
2903         prism2_update_comms_qual(local->dev);
2904 }
2905
2906
2907 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2908  * used to monitor that local->last_tick_timer is being updated. If not,
2909  * interrupt busy-loop is assumed and driver tries to recover by masking out
2910  * some events. */
2911 static void hostap_tick_timer(unsigned long data)
2912 {
2913         static unsigned long last_inquire = 0;
2914         local_info_t *local = (local_info_t *) data;
2915         local->last_tick_timer = jiffies;
2916
2917         /* Inquire CommTallies every 10 seconds to keep the statistics updated
2918          * more often during low load and when using 32-bit tallies. */
2919         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2920             !local->hw_downloading && local->hw_ready &&
2921             !local->hw_resetting && local->dev_enabled) {
2922                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2923                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2924                 last_inquire = jiffies;
2925         }
2926
2927         if ((local->last_comms_qual_update == 0 ||
2928              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2929             (local->iw_mode == IW_MODE_INFRA ||
2930              local->iw_mode == IW_MODE_ADHOC)) {
2931                 schedule_work(&local->comms_qual_update);
2932         }
2933
2934         local->tick_timer.expires = jiffies + 2 * HZ;
2935         add_timer(&local->tick_timer);
2936 }
2937
2938
2939 #ifndef PRISM2_NO_PROCFS_DEBUG
2940 static int prism2_registers_proc_read(char *page, char **start, off_t off,
2941                                       int count, int *eof, void *data)
2942 {
2943         char *p = page;
2944         local_info_t *local = (local_info_t *) data;
2945
2946         if (off != 0) {
2947                 *eof = 1;
2948                 return 0;
2949         }
2950
2951 #define SHOW_REG(n) \
2952 p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2953
2954         SHOW_REG(CMD);
2955         SHOW_REG(PARAM0);
2956         SHOW_REG(PARAM1);
2957         SHOW_REG(PARAM2);
2958         SHOW_REG(STATUS);
2959         SHOW_REG(RESP0);
2960         SHOW_REG(RESP1);
2961         SHOW_REG(RESP2);
2962         SHOW_REG(INFOFID);
2963         SHOW_REG(CONTROL);
2964         SHOW_REG(SELECT0);
2965         SHOW_REG(SELECT1);
2966         SHOW_REG(OFFSET0);
2967         SHOW_REG(OFFSET1);
2968         SHOW_REG(RXFID);
2969         SHOW_REG(ALLOCFID);
2970         SHOW_REG(TXCOMPLFID);
2971         SHOW_REG(SWSUPPORT0);
2972         SHOW_REG(SWSUPPORT1);
2973         SHOW_REG(SWSUPPORT2);
2974         SHOW_REG(EVSTAT);
2975         SHOW_REG(INTEN);
2976         SHOW_REG(EVACK);
2977         /* Do not read data registers, because they change the state of the
2978          * MAC (offset += 2) */
2979         /* SHOW_REG(DATA0); */
2980         /* SHOW_REG(DATA1); */
2981         SHOW_REG(AUXPAGE);
2982         SHOW_REG(AUXOFFSET);
2983         /* SHOW_REG(AUXDATA); */
2984 #ifdef PRISM2_PCI
2985         SHOW_REG(PCICOR);
2986         SHOW_REG(PCIHCR);
2987         SHOW_REG(PCI_M0_ADDRH);
2988         SHOW_REG(PCI_M0_ADDRL);
2989         SHOW_REG(PCI_M0_LEN);
2990         SHOW_REG(PCI_M0_CTL);
2991         SHOW_REG(PCI_STATUS);
2992         SHOW_REG(PCI_M1_ADDRH);
2993         SHOW_REG(PCI_M1_ADDRL);
2994         SHOW_REG(PCI_M1_LEN);
2995         SHOW_REG(PCI_M1_CTL);
2996 #endif /* PRISM2_PCI */
2997
2998         return (p - page);
2999 }
3000 #endif /* PRISM2_NO_PROCFS_DEBUG */
3001
3002
3003 struct set_tim_data {
3004         struct list_head list;
3005         int aid;
3006         int set;
3007 };
3008
3009 static int prism2_set_tim(struct net_device *dev, int aid, int set)
3010 {
3011         struct list_head *ptr;
3012         struct set_tim_data *new_entry;
3013         struct hostap_interface *iface;
3014         local_info_t *local;
3015
3016         iface = netdev_priv(dev);
3017         local = iface->local;
3018
3019         new_entry = (struct set_tim_data *)
3020                 kmalloc(sizeof(*new_entry), GFP_ATOMIC);
3021         if (new_entry == NULL) {
3022                 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
3023                        local->dev->name);
3024                 return -ENOMEM;
3025         }
3026         memset(new_entry, 0, sizeof(*new_entry));
3027         new_entry->aid = aid;
3028         new_entry->set = set;
3029
3030         spin_lock_bh(&local->set_tim_lock);
3031         list_for_each(ptr, &local->set_tim_list) {
3032                 struct set_tim_data *entry =
3033                         list_entry(ptr, struct set_tim_data, list);
3034                 if (entry->aid == aid) {
3035                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3036                                "set=%d ==> %d\n",
3037                                local->dev->name, aid, entry->set, set);
3038                         entry->set = set;
3039                         kfree(new_entry);
3040                         new_entry = NULL;
3041                         break;
3042                 }
3043         }
3044         if (new_entry)
3045                 list_add_tail(&new_entry->list, &local->set_tim_list);
3046         spin_unlock_bh(&local->set_tim_lock);
3047
3048         schedule_work(&local->set_tim_queue);
3049
3050         return 0;
3051 }
3052
3053
3054 static void handle_set_tim_queue(struct work_struct *work)
3055 {
3056         local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3057         struct set_tim_data *entry;
3058         u16 val;
3059
3060         for (;;) {
3061                 entry = NULL;
3062                 spin_lock_bh(&local->set_tim_lock);
3063                 if (!list_empty(&local->set_tim_list)) {
3064                         entry = list_entry(local->set_tim_list.next,
3065                                            struct set_tim_data, list);
3066                         list_del(&entry->list);
3067                 }
3068                 spin_unlock_bh(&local->set_tim_lock);
3069                 if (!entry)
3070                         break;
3071
3072                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3073                        local->dev->name, entry->aid, entry->set);
3074
3075                 val = entry->aid;
3076                 if (entry->set)
3077                         val |= 0x8000;
3078                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3079                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3080                                "set=%d)\n",
3081                                local->dev->name, entry->aid, entry->set);
3082                 }
3083
3084                 kfree(entry);
3085         }
3086 }
3087
3088
3089 static void prism2_clear_set_tim_queue(local_info_t *local)
3090 {
3091         struct list_head *ptr, *n;
3092
3093         list_for_each_safe(ptr, n, &local->set_tim_list) {
3094                 struct set_tim_data *entry;
3095                 entry = list_entry(ptr, struct set_tim_data, list);
3096                 list_del(&entry->list);
3097                 kfree(entry);
3098         }
3099 }
3100
3101
3102 /*
3103  * HostAP uses two layers of net devices, where the inner
3104  * layer gets called all the time from the outer layer.
3105  * This is a natural nesting, which needs a split lock type.
3106  */
3107 static struct lock_class_key hostap_netdev_xmit_lock_key;
3108
3109
3110 static struct net_device *
3111 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3112                        struct device *sdev)
3113 {
3114         struct net_device *dev;
3115         struct hostap_interface *iface;
3116         struct local_info *local;
3117         int len, i, ret;
3118
3119         if (funcs == NULL)
3120                 return NULL;
3121
3122         len = strlen(dev_template);
3123         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3124                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3125                        dev_template);
3126                 return NULL;
3127         }
3128
3129         len = sizeof(struct hostap_interface) +
3130                 3 + sizeof(struct local_info) +
3131                 3 + sizeof(struct ap_data);
3132
3133         dev = alloc_etherdev(len);
3134         if (dev == NULL)
3135                 return NULL;
3136
3137         iface = netdev_priv(dev);
3138         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3139         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3140         local->dev = iface->dev = dev;
3141         iface->local = local;
3142         iface->type = HOSTAP_INTERFACE_MASTER;
3143         INIT_LIST_HEAD(&local->hostap_interfaces);
3144
3145         local->hw_module = THIS_MODULE;
3146
3147 #ifdef PRISM2_IO_DEBUG
3148         local->io_debug_enabled = 1;
3149 #endif /* PRISM2_IO_DEBUG */
3150
3151         local->func = funcs;
3152         local->func->cmd = hfa384x_cmd;
3153         local->func->read_regs = hfa384x_read_regs;
3154         local->func->get_rid = hfa384x_get_rid;
3155         local->func->set_rid = hfa384x_set_rid;
3156         local->func->hw_enable = prism2_hw_enable;
3157         local->func->hw_config = prism2_hw_config;
3158         local->func->hw_reset = prism2_hw_reset;
3159         local->func->hw_shutdown = prism2_hw_shutdown;
3160         local->func->reset_port = prism2_reset_port;
3161         local->func->schedule_reset = prism2_schedule_reset;
3162 #ifdef PRISM2_DOWNLOAD_SUPPORT
3163         local->func->read_aux = prism2_download_aux_dump;
3164         local->func->download = prism2_download;
3165 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3166         local->func->tx = prism2_tx_80211;
3167         local->func->set_tim = prism2_set_tim;
3168         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3169                                             * skb->data (FIX: maybe for DMA bus
3170                                             * mastering? */
3171
3172         local->mtu = mtu;
3173
3174         rwlock_init(&local->iface_lock);
3175         spin_lock_init(&local->txfidlock);
3176         spin_lock_init(&local->cmdlock);
3177         spin_lock_init(&local->baplock);
3178         spin_lock_init(&local->lock);
3179         init_MUTEX(&local->rid_bap_sem);
3180
3181         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3182                 card_idx = 0;
3183         local->card_idx = card_idx;
3184
3185         len = strlen(essid);
3186         memcpy(local->essid, essid,
3187                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3188         local->essid[MAX_SSID_LEN] = '\0';
3189         i = GET_INT_PARM(iw_mode, card_idx);
3190         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3191             i == IW_MODE_MONITOR) {
3192                 local->iw_mode = i;
3193         } else {
3194                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3195                        "IW_MODE_MASTER\n", i);
3196                 local->iw_mode = IW_MODE_MASTER;
3197         }
3198         local->channel = GET_INT_PARM(channel, card_idx);
3199         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3200         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3201         local->wds_max_connections = 16;
3202         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3203         local->manual_retry_count = -1;
3204         local->rts_threshold = 2347;
3205         local->fragm_threshold = 2346;
3206         local->rssi_to_dBm = 100; /* default; to be overriden by
3207                                    * cnfDbmAdjust, if available */
3208         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3209         local->sram_type = -1;
3210         local->scan_channel_mask = 0xffff;
3211
3212         /* Initialize task queue structures */
3213         INIT_WORK(&local->reset_queue, handle_reset_queue);
3214         INIT_WORK(&local->set_multicast_list_queue,
3215                   hostap_set_multicast_list_queue);
3216
3217         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3218         INIT_LIST_HEAD(&local->set_tim_list);
3219         spin_lock_init(&local->set_tim_lock);
3220
3221         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3222
3223         /* Initialize tasklets for handling hardware IRQ related operations
3224          * outside hw IRQ handler */
3225 #define HOSTAP_TASKLET_INIT(q, f, d) \
3226 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3227 while (0)
3228         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3229                             (unsigned long) local);
3230
3231         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3232                             (unsigned long) local);
3233         hostap_info_init(local);
3234
3235         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3236                             hostap_rx_tasklet, (unsigned long) local);
3237         skb_queue_head_init(&local->rx_list);
3238
3239         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3240                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3241         skb_queue_head_init(&local->sta_tx_exc_list);
3242
3243         INIT_LIST_HEAD(&local->cmd_queue);
3244         init_waitqueue_head(&local->hostscan_wq);
3245         INIT_LIST_HEAD(&local->crypt_deinit_list);
3246         init_timer(&local->crypt_deinit_timer);
3247         local->crypt_deinit_timer.data = (unsigned long) local;
3248         local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
3249
3250         init_timer(&local->passive_scan_timer);
3251         local->passive_scan_timer.data = (unsigned long) local;
3252         local->passive_scan_timer.function = hostap_passive_scan;
3253
3254         init_timer(&local->tick_timer);
3255         local->tick_timer.data = (unsigned long) local;
3256         local->tick_timer.function = hostap_tick_timer;
3257         local->tick_timer.expires = jiffies + 2 * HZ;
3258         add_timer(&local->tick_timer);
3259
3260         INIT_LIST_HEAD(&local->bss_list);
3261
3262         hostap_setup_dev(dev, local, 1);
3263         local->saved_eth_header_parse = dev->hard_header_parse;
3264
3265         dev->hard_start_xmit = hostap_master_start_xmit;
3266         dev->type = ARPHRD_IEEE80211;
3267         dev->hard_header_parse = hostap_80211_header_parse;
3268
3269         rtnl_lock();
3270         ret = dev_alloc_name(dev, "wifi%d");
3271         SET_NETDEV_DEV(dev, sdev);
3272         if (ret >= 0)
3273                 ret = register_netdevice(dev);
3274
3275         lockdep_set_class(&dev->_xmit_lock, &hostap_netdev_xmit_lock_key);
3276         rtnl_unlock();
3277         if (ret < 0) {
3278                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3279                        dev_info);
3280                 goto fail;
3281         }
3282         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3283
3284 #ifndef PRISM2_NO_PROCFS_DEBUG
3285         create_proc_read_entry("registers", 0, local->proc,
3286                                prism2_registers_proc_read, local);
3287 #endif /* PRISM2_NO_PROCFS_DEBUG */
3288
3289         hostap_init_data(local);
3290         return dev;
3291
3292  fail:
3293         free_netdev(dev);
3294         return NULL;
3295 }
3296
3297
3298 static int hostap_hw_ready(struct net_device *dev)
3299 {
3300         struct hostap_interface *iface;
3301         struct local_info *local;
3302
3303         iface = netdev_priv(dev);
3304         local = iface->local;
3305         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3306                                            "", dev_template);
3307
3308         if (local->ddev) {
3309                 if (local->iw_mode == IW_MODE_INFRA ||
3310                     local->iw_mode == IW_MODE_ADHOC) {
3311                         netif_carrier_off(local->dev);
3312                         netif_carrier_off(local->ddev);
3313                 }
3314                 hostap_init_proc(local);
3315                 hostap_init_ap_proc(local);
3316                 return 0;
3317         }
3318
3319         return -1;
3320 }
3321
3322
3323 static void prism2_free_local_data(struct net_device *dev)
3324 {
3325         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3326         int i;
3327         struct hostap_interface *iface;
3328         struct local_info *local;
3329         struct list_head *ptr, *n;
3330
3331         if (dev == NULL)
3332                 return;
3333
3334         iface = netdev_priv(dev);
3335         local = iface->local;
3336
3337         /* Unregister all netdevs before freeing local data. */
3338         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3339                 iface = list_entry(ptr, struct hostap_interface, list);
3340                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3341                         /* special handling for this interface below */
3342                         continue;
3343                 }
3344                 hostap_remove_interface(iface->dev, 0, 1);
3345         }
3346
3347         unregister_netdev(local->dev);
3348
3349         flush_scheduled_work();
3350
3351         if (timer_pending(&local->crypt_deinit_timer))
3352                 del_timer(&local->crypt_deinit_timer);
3353         prism2_crypt_deinit_entries(local, 1);
3354
3355         if (timer_pending(&local->passive_scan_timer))
3356                 del_timer(&local->passive_scan_timer);
3357
3358         if (timer_pending(&local->tick_timer))
3359                 del_timer(&local->tick_timer);
3360
3361         prism2_clear_cmd_queue(local);
3362
3363         skb_queue_purge(&local->info_list);
3364         skb_queue_purge(&local->rx_list);
3365         skb_queue_purge(&local->sta_tx_exc_list);
3366
3367         if (local->dev_enabled)
3368                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3369
3370         for (i = 0; i < WEP_KEYS; i++) {
3371                 struct ieee80211_crypt_data *crypt = local->crypt[i];
3372                 if (crypt) {
3373                         if (crypt->ops)
3374                                 crypt->ops->deinit(crypt->priv);
3375                         kfree(crypt);
3376                         local->crypt[i] = NULL;
3377                 }
3378         }
3379
3380         if (local->ap != NULL)
3381                 hostap_free_data(local->ap);
3382
3383 #ifndef PRISM2_NO_PROCFS_DEBUG
3384         if (local->proc != NULL)
3385                 remove_proc_entry("registers", local->proc);
3386 #endif /* PRISM2_NO_PROCFS_DEBUG */
3387         hostap_remove_proc(local);
3388
3389         tx_cb = local->tx_callback;
3390         while (tx_cb != NULL) {
3391                 tx_cb_prev = tx_cb;
3392                 tx_cb = tx_cb->next;
3393                 kfree(tx_cb_prev);
3394         }
3395
3396         hostap_set_hostapd(local, 0, 0);
3397         hostap_set_hostapd_sta(local, 0, 0);
3398
3399         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3400                 if (local->frag_cache[i].skb != NULL)
3401                         dev_kfree_skb(local->frag_cache[i].skb);
3402         }
3403
3404 #ifdef PRISM2_DOWNLOAD_SUPPORT
3405         prism2_download_free_data(local->dl_pri);
3406         prism2_download_free_data(local->dl_sec);
3407 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3408
3409         prism2_clear_set_tim_queue(local);
3410
3411         list_for_each_safe(ptr, n, &local->bss_list) {
3412                 struct hostap_bss_info *bss =
3413                         list_entry(ptr, struct hostap_bss_info, list);
3414                 kfree(bss);
3415         }
3416
3417         kfree(local->pda);
3418         kfree(local->last_scan_results);
3419         kfree(local->generic_elem);
3420
3421         free_netdev(local->dev);
3422 }
3423
3424
3425 #ifndef PRISM2_PLX
3426 static void prism2_suspend(struct net_device *dev)
3427 {
3428         struct hostap_interface *iface;
3429         struct local_info *local;
3430         union iwreq_data wrqu;
3431
3432         iface = dev->priv;
3433         local = iface->local;
3434
3435         /* Send disconnect event, e.g., to trigger reassociation after resume
3436          * if wpa_supplicant is used. */
3437         memset(&wrqu, 0, sizeof(wrqu));
3438         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3439         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3440
3441         /* Disable hardware and firmware */
3442         prism2_hw_shutdown(dev, 0);
3443 }
3444 #endif /* PRISM2_PLX */
3445
3446
3447 /* These might at some point be compiled separately and used as separate
3448  * kernel modules or linked into one */
3449 #ifdef PRISM2_DOWNLOAD_SUPPORT
3450 #include "hostap_download.c"
3451 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3452
3453 #ifdef PRISM2_CALLBACK
3454 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3455  * This can use platform specific code and must define prism2_callback()
3456  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3457  * used. */
3458 #include "hostap_callback.c"
3459 #endif /* PRISM2_CALLBACK */