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Chinese: add translation of oops-tracing.txt
[pv_ops_mirror.git] / drivers / net / wireless / hostap / hostap_hw.c
blobc592641e914e695d99aa1e408acae2501ca03496
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 * <j@w1.fi>
7 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.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 = kzalloc(sizeof(*entry), GFP_ATOMIC);
351 if (entry == NULL) {
352 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
353 dev->name);
354 return -ENOMEM;
355 }
356 atomic_set(&entry->usecnt, 1);
357 entry->type = CMD_SLEEP;
358 entry->cmd = cmd;
359 entry->param0 = param0;
360 if (param1)
361 entry->param1 = *param1;
362 init_waitqueue_head(&entry->compl);
363
364 /* prepare to wait for command completion event, but do not sleep yet
365 */
366 add_wait_queue(&entry->compl, &wait);
367 set_current_state(TASK_INTERRUPTIBLE);
368
369 spin_lock_irqsave(&local->cmdlock, flags);
370 issue = list_empty(&local->cmd_queue);
371 if (issue)
372 entry->issuing = 1;
373 list_add_tail(&entry->list, &local->cmd_queue);
374 local->cmd_queue_len++;
375 spin_unlock_irqrestore(&local->cmdlock, flags);
376
377 err = 0;
378 if (!issue)
379 goto wait_completion;
380
381 if (signal_pending(current))
382 err = -EINTR;
383
384 if (!err) {
385 if (hfa384x_cmd_issue(dev, entry))
386 err = -ETIMEDOUT;
387 else
388 issued = 1;
389 }
390
391 wait_completion:
392 if (!err && entry->type != CMD_COMPLETED) {
393 /* sleep until command is completed or timed out */
394 res = schedule_timeout(2 * HZ);
395 } else
396 res = -1;
397
398 if (!err && signal_pending(current))
399 err = -EINTR;
400
401 if (err && issued) {
402 /* the command was issued, so a CmdCompl event should occur
403 * soon; however, there's a pending signal and
404 * schedule_timeout() would be interrupted; wait a short period
405 * of time to avoid removing entry from the list before
406 * CmdCompl event */
407 udelay(300);
408 }
409
410 set_current_state(TASK_RUNNING);
411 remove_wait_queue(&entry->compl, &wait);
412
413 /* If entry->list is still in the list, it must be removed
414 * first and in this case prism2_cmd_ev() does not yet have
415 * local reference to it, and the data can be kfree()'d
416 * here. If the command completion event is still generated,
417 * it will be assigned to next (possibly) pending command, but
418 * the driver will reset the card anyway due to timeout
419 *
420 * If the entry is not in the list prism2_cmd_ev() has a local
421 * reference to it, but keeps cmdlock as long as the data is
422 * needed, so the data can be kfree()'d here. */
423
424 /* FIX: if the entry->list is in the list, it has not been completed
425 * yet, so removing it here is somewhat wrong.. this could cause
426 * references to freed memory and next list_del() causing NULL pointer
427 * dereference.. it would probably be better to leave the entry in the
428 * list and the list should be emptied during hw reset */
429
430 spin_lock_irqsave(&local->cmdlock, flags);
431 if (!list_empty(&entry->list)) {
432 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
433 "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
434 entry->type, res);
435 list_del_init(&entry->list);
436 local->cmd_queue_len--;
437 }
438 spin_unlock_irqrestore(&local->cmdlock, flags);
439
440 if (err) {
441 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
442 dev->name, err);
443 res = err;
444 goto done;
445 }
446
447 if (entry->type != CMD_COMPLETED) {
448 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
449 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
450 "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
451 "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
452 res, entry, entry->type, entry->cmd, entry->param0, reg,
453 HFA384X_INW(HFA384X_INTEN_OFF));
454 if (reg & HFA384X_EV_CMD) {
455 /* Command completion event is pending, but the
456 * interrupt was not delivered - probably an issue
457 * with pcmcia-cs configuration. */
458 printk(KERN_WARNING "%s: interrupt delivery does not "
459 "seem to work\n", dev->name);
460 }
461 prism2_io_debug_error(dev, 3);
462 res = -ETIMEDOUT;
463 goto done;
464 }
465
466 if (resp0 != NULL)
467 *resp0 = entry->resp0;
468 #ifndef final_version
469 if (entry->res) {
470 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
471 "resp0=0x%04x\n",
472 dev->name, cmd, entry->res, entry->resp0);
473 }
474 #endif /* final_version */
475
476 res = entry->res;
477 done:
478 hostap_cmd_queue_free(local, entry, 1);
479 return res;
480 }
481
482
483 /**
484 * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
485 * @dev: pointer to net_device
486 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
487 * @param0: value for Param0 register
488 * @callback: command completion callback function (%NULL = no callback)
489 * @context: context data to be given to the callback function
490 *
491 * Issue given command (possibly after waiting in command queue) and use
492 * callback function to indicate command completion. This can be called both
493 * from user and interrupt context. The callback function will be called in
494 * hardware IRQ context. It can be %NULL, when no function is called when
495 * command is completed.
496 */
497 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
498 void (*callback)(struct net_device *dev,
499 long context, u16 resp0,
500 u16 status),
501 long context)
502 {
503 struct hostap_interface *iface;
504 local_info_t *local;
505 int issue, ret;
506 unsigned long flags;
507 struct hostap_cmd_queue *entry;
508
509 iface = netdev_priv(dev);
510 local = iface->local;
511
512 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
513 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
514 dev->name);
515 return -1;
516 }
517
518 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
519 if (entry == NULL) {
520 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
521 "failed\n", dev->name);
522 return -ENOMEM;
523 }
524 atomic_set(&entry->usecnt, 1);
525 entry->type = CMD_CALLBACK;
526 entry->cmd = cmd;
527 entry->param0 = param0;
528 entry->callback = callback;
529 entry->context = context;
530
531 spin_lock_irqsave(&local->cmdlock, flags);
532 issue = list_empty(&local->cmd_queue);
533 if (issue)
534 entry->issuing = 1;
535 list_add_tail(&entry->list, &local->cmd_queue);
536 local->cmd_queue_len++;
537 spin_unlock_irqrestore(&local->cmdlock, flags);
538
539 if (issue && hfa384x_cmd_issue(dev, entry))
540 ret = -ETIMEDOUT;
541 else
542 ret = 0;
543
544 hostap_cmd_queue_free(local, entry, ret);
545
546 return ret;
547 }
548
549
550 /**
551 * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
552 * @dev: pointer to net_device
553 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
554 * @param0: value for Param0 register
555 * @io_debug_num: I/O debug error number
556 *
557 * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
558 */
559 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
560 int io_debug_num)
561 {
562 int tries;
563 u16 reg;
564
565 /* wait until busy bit is clear; this should always be clear since the
566 * commands are serialized */
567 tries = HFA384X_CMD_BUSY_TIMEOUT;
568 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
569 tries--;
570 udelay(1);
571 }
572 if (tries == 0) {
573 reg = HFA384X_INW(HFA384X_CMD_OFF);
574 prism2_io_debug_error(dev, io_debug_num);
575 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
576 "reg=0x%04x\n", dev->name, io_debug_num, reg);
577 return -ETIMEDOUT;
578 }
579
580 /* write command */
581 HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
582 HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
583
584 return 0;
585 }
586
587
588 /**
589 * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
590 * @dev: pointer to net_device
591 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
592 * @param0: value for Param0 register
593 */
594 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
595 {
596 int res, tries;
597 u16 reg;
598
599 res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
600 if (res)
601 return res;
602
603 /* wait for command completion */
604 if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
605 tries = HFA384X_DL_COMPL_TIMEOUT;
606 else
607 tries = HFA384X_CMD_COMPL_TIMEOUT;
608
609 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
610 tries > 0) {
611 tries--;
612 udelay(10);
613 }
614 if (tries == 0) {
615 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
616 prism2_io_debug_error(dev, 5);
617 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
618 "reg=0x%04x\n", dev->name, reg);
619 return -ETIMEDOUT;
620 }
621
622 res = (HFA384X_INW(HFA384X_STATUS_OFF) &
623 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
624 BIT(8))) >> 8;
625 #ifndef final_version
626 if (res) {
627 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
628 dev->name, cmd, res);
629 }
630 #endif
631
632 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
633
634 return res;
635 }
636
637
638 /**
639 * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
640 * @dev: pointer to net_device
641 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
642 * @param0: value for Param0 register
643 */
644 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
645 u16 param0)
646 {
647 return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
648 }
649
650
651 /**
652 * prism2_cmd_ev - Prism2 command completion event handler
653 * @dev: pointer to net_device
654 *
655 * Interrupt handler for command completion events. Called by the main
656 * interrupt handler in hardware IRQ context. Read Resp0 and status registers
657 * from the hardware and ACK the event. Depending on the issued command type
658 * either wake up the sleeping process that is waiting for command completion
659 * or call the callback function. Issue the next command, if one is pending.
660 */
661 static void prism2_cmd_ev(struct net_device *dev)
662 {
663 struct hostap_interface *iface;
664 local_info_t *local;
665 struct hostap_cmd_queue *entry = NULL;
666
667 iface = netdev_priv(dev);
668 local = iface->local;
669
670 spin_lock(&local->cmdlock);
671 if (!list_empty(&local->cmd_queue)) {
672 entry = list_entry(local->cmd_queue.next,
673 struct hostap_cmd_queue, list);
674 atomic_inc(&entry->usecnt);
675 list_del_init(&entry->list);
676 local->cmd_queue_len--;
677
678 if (!entry->issued) {
679 printk(KERN_DEBUG "%s: Command completion event, but "
680 "cmd not issued\n", dev->name);
681 __hostap_cmd_queue_free(local, entry, 1);
682 entry = NULL;
683 }
684 }
685 spin_unlock(&local->cmdlock);
686
687 if (!entry) {
688 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
689 printk(KERN_DEBUG "%s: Command completion event, but no "
690 "pending commands\n", dev->name);
691 return;
692 }
693
694 entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
695 entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
696 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
697 BIT(9) | BIT(8))) >> 8;
698 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
699
700 /* TODO: rest of the CmdEv handling could be moved to tasklet */
701 if (entry->type == CMD_SLEEP) {
702 entry->type = CMD_COMPLETED;
703 wake_up_interruptible(&entry->compl);
704 } else if (entry->type == CMD_CALLBACK) {
705 if (entry->callback)
706 entry->callback(dev, entry->context, entry->resp0,
707 entry->res);
708 } else {
709 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
710 dev->name, entry->type);
711 }
712 hostap_cmd_queue_free(local, entry, 1);
713
714 /* issue next command, if pending */
715 entry = NULL;
716 spin_lock(&local->cmdlock);
717 if (!list_empty(&local->cmd_queue)) {
718 entry = list_entry(local->cmd_queue.next,
719 struct hostap_cmd_queue, list);
720 if (entry->issuing) {
721 /* hfa384x_cmd() has already started issuing this
722 * command, so do not start here */
723 entry = NULL;
724 }
725 if (entry)
726 atomic_inc(&entry->usecnt);
727 }
728 spin_unlock(&local->cmdlock);
729
730 if (entry) {
731 /* issue next command; if command issuing fails, remove the
732 * entry from cmd_queue */
733 int res = hfa384x_cmd_issue(dev, entry);
734 spin_lock(&local->cmdlock);
735 __hostap_cmd_queue_free(local, entry, res);
736 spin_unlock(&local->cmdlock);
737 }
738 }
739
740
741 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
742 {
743 int tries = HFA384X_BAP_BUSY_TIMEOUT;
744 int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
745
746 while (res && tries > 0) {
747 tries--;
748 udelay(1);
749 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
750 }
751 return res;
752 }
753
754
755 /* Offset must be even */
756 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
757 int offset)
758 {
759 u16 o_off, s_off;
760 int ret = 0;
761
762 if (offset % 2 || bap > 1)
763 return -EINVAL;
764
765 if (bap == BAP1) {
766 o_off = HFA384X_OFFSET1_OFF;
767 s_off = HFA384X_SELECT1_OFF;
768 } else {
769 o_off = HFA384X_OFFSET0_OFF;
770 s_off = HFA384X_SELECT0_OFF;
771 }
772
773 if (hfa384x_wait_offset(dev, o_off)) {
774 prism2_io_debug_error(dev, 7);
775 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
776 dev->name);
777 ret = -ETIMEDOUT;
778 goto out;
779 }
780
781 HFA384X_OUTW(id, s_off);
782 HFA384X_OUTW(offset, o_off);
783
784 if (hfa384x_wait_offset(dev, o_off)) {
785 prism2_io_debug_error(dev, 8);
786 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
787 dev->name);
788 ret = -ETIMEDOUT;
789 goto out;
790 }
791 #ifndef final_version
792 if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
793 prism2_io_debug_error(dev, 9);
794 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
795 "(%d,0x04%x,%d); reg=0x%04x\n",
796 dev->name, bap, id, offset, HFA384X_INW(o_off));
797 ret = -EINVAL;
798 }
799 #endif
800
801 out:
802 return ret;
803 }
804
805
806 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
807 int exact_len)
808 {
809 struct hostap_interface *iface;
810 local_info_t *local;
811 int res, rlen = 0;
812 struct hfa384x_rid_hdr rec;
813
814 iface = netdev_priv(dev);
815 local = iface->local;
816
817 if (local->no_pri) {
818 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
819 "f/w\n", dev->name, rid, len);
820 return -ENOTTY; /* Well.. not really correct, but return
821 * something unique enough.. */
822 }
823
824 if ((local->func->card_present && !local->func->card_present(local)) ||
825 local->hw_downloading)
826 return -ENODEV;
827
828 res = mutex_lock_interruptible(&local->rid_bap_mtx);
829 if (res)
830 return res;
831
832 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
833 if (res) {
834 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
835 "(res=%d, rid=%04x, len=%d)\n",
836 dev->name, res, rid, len);
837 mutex_unlock(&local->rid_bap_mtx);
838 return res;
839 }
840
841 spin_lock_bh(&local->baplock);
842
843 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
844 if (!res)
845 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
846
847 if (le16_to_cpu(rec.len) == 0) {
848 /* RID not available */
849 res = -ENODATA;
850 }
851
852 rlen = (le16_to_cpu(rec.len) - 1) * 2;
853 if (!res && exact_len && rlen != len) {
854 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
855 "rid=0x%04x, len=%d (expected %d)\n",
856 dev->name, rid, rlen, len);
857 res = -ENODATA;
858 }
859
860 if (!res)
861 res = hfa384x_from_bap(dev, BAP0, buf, len);
862
863 spin_unlock_bh(&local->baplock);
864 mutex_unlock(&local->rid_bap_mtx);
865
866 if (res) {
867 if (res != -ENODATA)
868 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
869 "len=%d) - failed - res=%d\n", dev->name, rid,
870 len, res);
871 if (res == -ETIMEDOUT)
872 prism2_hw_reset(dev);
873 return res;
874 }
875
876 return rlen;
877 }
878
879
880 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
881 {
882 struct hostap_interface *iface;
883 local_info_t *local;
884 struct hfa384x_rid_hdr rec;
885 int res;
886
887 iface = netdev_priv(dev);
888 local = iface->local;
889
890 if (local->no_pri) {
891 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
892 "f/w\n", dev->name, rid, len);
893 return -ENOTTY; /* Well.. not really correct, but return
894 * something unique enough.. */
895 }
896
897 if ((local->func->card_present && !local->func->card_present(local)) ||
898 local->hw_downloading)
899 return -ENODEV;
900
901 rec.rid = cpu_to_le16(rid);
902 /* RID len in words and +1 for rec.rid */
903 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
904
905 res = mutex_lock_interruptible(&local->rid_bap_mtx);
906 if (res)
907 return res;
908
909 spin_lock_bh(&local->baplock);
910 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
911 if (!res)
912 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
913 if (!res)
914 res = hfa384x_to_bap(dev, BAP0, buf, len);
915 spin_unlock_bh(&local->baplock);
916
917 if (res) {
918 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
919 "failed - res=%d\n", dev->name, rid, len, res);
920 mutex_unlock(&local->rid_bap_mtx);
921 return res;
922 }
923
924 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
925 mutex_unlock(&local->rid_bap_mtx);
926
927 if (res) {
928 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
929 "failed (res=%d, rid=%04x, len=%d)\n",
930 dev->name, res, rid, len);
931
932 if (res == -ETIMEDOUT)
933 prism2_hw_reset(dev);
934 }
935
936 return res;
937 }
938
939
940 static void hfa384x_disable_interrupts(struct net_device *dev)
941 {
942 /* disable interrupts and clear event status */
943 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
944 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
945 }
946
947
948 static void hfa384x_enable_interrupts(struct net_device *dev)
949 {
950 /* ack pending events and enable interrupts from selected events */
951 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
952 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
953 }
954
955
956 static void hfa384x_events_no_bap0(struct net_device *dev)
957 {
958 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
959 HFA384X_INTEN_OFF);
960 }
961
962
963 static void hfa384x_events_all(struct net_device *dev)
964 {
965 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
966 }
967
968
969 static void hfa384x_events_only_cmd(struct net_device *dev)
970 {
971 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
972 }
973
974
975 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
976 {
977 u16 fid;
978 unsigned long delay;
979
980 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
981 * below would be handled like CmdCompl event (sleep here, wake up from
982 * interrupt handler */
983 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
984 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
985 dev->name, len);
986 return 0xffff;
987 }
988
989 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
990 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
991 time_before(jiffies, delay))
992 yield();
993 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
994 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
995 return 0xffff;
996 }
997
998 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
999 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1000
1001 return fid;
1002 }
1003
1004
1005 static int prism2_reset_port(struct net_device *dev)
1006 {
1007 struct hostap_interface *iface;
1008 local_info_t *local;
1009 int res;
1010
1011 iface = netdev_priv(dev);
1012 local = iface->local;
1013
1014 if (!local->dev_enabled)
1015 return 0;
1016
1017 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1018 NULL, NULL);
1019 if (res)
1020 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1021 dev->name);
1022 else {
1023 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1024 NULL, NULL);
1025 if (res)
1026 printk(KERN_DEBUG "%s: reset port failed to enable "
1027 "port\n", dev->name);
1028 }
1029
1030 /* It looks like at least some STA firmware versions reset
1031 * fragmentation threshold back to 2346 after enable command. Restore
1032 * the configured value, if it differs from this default. */
1033 if (local->fragm_threshold != 2346 &&
1034 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1035 local->fragm_threshold)) {
1036 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1037 "threshold (%d) after Port0 enable\n",
1038 dev->name, local->fragm_threshold);
1039 }
1040
1041 /* Some firmwares lose antenna selection settings on reset */
1042 (void) hostap_set_antsel(local);
1043
1044 return res;
1045 }
1046
1047
1048 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1049 const char *txt)
1050 {
1051 struct hfa384x_comp_ident comp;
1052 struct hostap_interface *iface;
1053 local_info_t *local;
1054
1055 iface = netdev_priv(dev);
1056 local = iface->local;
1057
1058 if (local->no_pri) {
1059 /* PRI f/w not yet available - cannot read RIDs */
1060 return -1;
1061 }
1062 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1063 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1064 return -1;
1065 }
1066
1067 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1068 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1069 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1070 return 0;
1071 }
1072
1073
1074 static int prism2_setup_rids(struct net_device *dev)
1075 {
1076 struct hostap_interface *iface;
1077 local_info_t *local;
1078 u16 tmp;
1079 int ret = 0;
1080
1081 iface = netdev_priv(dev);
1082 local = iface->local;
1083
1084 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1085
1086 if (!local->fw_ap) {
1087 tmp = hostap_get_porttype(local);
1088 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
1089 if (ret) {
1090 printk("%s: Port type setting to %d failed\n",
1091 dev->name, tmp);
1092 goto fail;
1093 }
1094 }
1095
1096 /* Setting SSID to empty string seems to kill the card in Host AP mode
1097 */
1098 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1099 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1100 local->essid);
1101 if (ret) {
1102 printk("%s: AP own SSID setting failed\n", dev->name);
1103 goto fail;
1104 }
1105 }
1106
1107 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1108 PRISM2_DATA_MAXLEN);
1109 if (ret) {
1110 printk("%s: MAC data length setting to %d failed\n",
1111 dev->name, PRISM2_DATA_MAXLEN);
1112 goto fail;
1113 }
1114
1115 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1116 printk("%s: Channel list read failed\n", dev->name);
1117 ret = -EINVAL;
1118 goto fail;
1119 }
1120 local->channel_mask = __le16_to_cpu(tmp);
1121
1122 if (local->channel < 1 || local->channel > 14 ||
1123 !(local->channel_mask & (1 << (local->channel - 1)))) {
1124 printk(KERN_WARNING "%s: Channel setting out of range "
1125 "(%d)!\n", dev->name, local->channel);
1126 ret = -EBUSY;
1127 goto fail;
1128 }
1129
1130 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1131 if (ret) {
1132 printk("%s: Channel setting to %d failed\n",
1133 dev->name, local->channel);
1134 goto fail;
1135 }
1136
1137 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1138 local->beacon_int);
1139 if (ret) {
1140 printk("%s: Beacon interval setting to %d failed\n",
1141 dev->name, local->beacon_int);
1142 /* this may fail with Symbol/Lucent firmware */
1143 if (ret == -ETIMEDOUT)
1144 goto fail;
1145 }
1146
1147 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1148 local->dtim_period);
1149 if (ret) {
1150 printk("%s: DTIM period setting to %d failed\n",
1151 dev->name, local->dtim_period);
1152 /* this may fail with Symbol/Lucent firmware */
1153 if (ret == -ETIMEDOUT)
1154 goto fail;
1155 }
1156
1157 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1158 local->is_promisc);
1159 if (ret)
1160 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1161 dev->name, local->is_promisc);
1162
1163 if (!local->fw_ap) {
1164 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1165 local->essid);
1166 if (ret) {
1167 printk("%s: Desired SSID setting failed\n", dev->name);
1168 goto fail;
1169 }
1170 }
1171
1172 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1173 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1174 * rates */
1175 if (local->tx_rate_control == 0) {
1176 local->tx_rate_control =
1177 HFA384X_RATES_1MBPS |
1178 HFA384X_RATES_2MBPS |
1179 HFA384X_RATES_5MBPS |
1180 HFA384X_RATES_11MBPS;
1181 }
1182 if (local->basic_rates == 0)
1183 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1184
1185 if (!local->fw_ap) {
1186 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1187 local->tx_rate_control);
1188 if (ret) {
1189 printk("%s: TXRateControl setting to %d failed\n",
1190 dev->name, local->tx_rate_control);
1191 goto fail;
1192 }
1193
1194 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1195 local->tx_rate_control);
1196 if (ret) {
1197 printk("%s: cnfSupportedRates setting to %d failed\n",
1198 dev->name, local->tx_rate_control);
1199 }
1200
1201 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1202 local->basic_rates);
1203 if (ret) {
1204 printk("%s: cnfBasicRates setting to %d failed\n",
1205 dev->name, local->basic_rates);
1206 }
1207
1208 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1209 if (ret) {
1210 printk("%s: Create IBSS setting to 1 failed\n",
1211 dev->name);
1212 }
1213 }
1214
1215 if (local->name_set)
1216 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1217 local->name);
1218
1219 if (hostap_set_encryption(local)) {
1220 printk(KERN_INFO "%s: could not configure encryption\n",
1221 dev->name);
1222 }
1223
1224 (void) hostap_set_antsel(local);
1225
1226 if (hostap_set_roaming(local)) {
1227 printk(KERN_INFO "%s: could not set host roaming\n",
1228 dev->name);
1229 }
1230
1231 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1232 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1233 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1234 dev->name, local->enh_sec);
1235
1236 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1237 * not working correctly (last seven counters report bogus values).
1238 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1239 * beginning with that firmware version. Another bug fix for 32-bit
1240 * tallies in 1.4.0; should 16-bit tallies be used for some other
1241 * versions, too? */
1242 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1243 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1244 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1245 "failed\n", dev->name);
1246 local->tallies32 = 0;
1247 } else
1248 local->tallies32 = 1;
1249 } else
1250 local->tallies32 = 0;
1251
1252 hostap_set_auth_algs(local);
1253
1254 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1255 local->fragm_threshold)) {
1256 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1257 "failed\n", dev->name, local->fragm_threshold);
1258 }
1259
1260 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1261 local->rts_threshold)) {
1262 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1263 dev->name, local->rts_threshold);
1264 }
1265
1266 if (local->manual_retry_count >= 0 &&
1267 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1268 local->manual_retry_count)) {
1269 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1270 dev->name, local->manual_retry_count);
1271 }
1272
1273 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1274 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1275 local->rssi_to_dBm = le16_to_cpu(tmp);
1276 }
1277
1278 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1279 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1280 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1281 dev->name);
1282 }
1283
1284 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1285 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1286 local->generic_elem, local->generic_elem_len)) {
1287 printk(KERN_INFO "%s: setting genericElement failed\n",
1288 dev->name);
1289 }
1290
1291 fail:
1292 return ret;
1293 }
1294
1295
1296 static int prism2_hw_init(struct net_device *dev, int initial)
1297 {
1298 struct hostap_interface *iface;
1299 local_info_t *local;
1300 int ret, first = 1;
1301 unsigned long start, delay;
1302
1303 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1304
1305 iface = netdev_priv(dev);
1306 local = iface->local;
1307
1308 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1309
1310 init:
1311 /* initialize HFA 384x */
1312 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1313 if (ret) {
1314 printk(KERN_INFO "%s: first command failed - assuming card "
1315 "does not have primary firmware\n", dev_info);
1316 }
1317
1318 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1319 /* EvStat has Cmd bit set in some cases, so retry once if no
1320 * wait was needed */
1321 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1322 printk(KERN_DEBUG "%s: init command completed too quickly - "
1323 "retrying\n", dev->name);
1324 first = 0;
1325 goto init;
1326 }
1327
1328 start = jiffies;
1329 delay = jiffies + HFA384X_INIT_TIMEOUT;
1330 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1331 time_before(jiffies, delay))
1332 yield();
1333 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1334 printk(KERN_DEBUG "%s: assuming no Primary image in "
1335 "flash - card initialization not completed\n",
1336 dev_info);
1337 local->no_pri = 1;
1338 #ifdef PRISM2_DOWNLOAD_SUPPORT
1339 if (local->sram_type == -1)
1340 local->sram_type = prism2_get_ram_size(local);
1341 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1342 return 1;
1343 }
1344 local->no_pri = 0;
1345 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1346 (jiffies - start) * 1000 / HZ);
1347 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1348 return 0;
1349 }
1350
1351
1352 static int prism2_hw_init2(struct net_device *dev, int initial)
1353 {
1354 struct hostap_interface *iface;
1355 local_info_t *local;
1356 int i;
1357
1358 iface = netdev_priv(dev);
1359 local = iface->local;
1360
1361 #ifdef PRISM2_DOWNLOAD_SUPPORT
1362 kfree(local->pda);
1363 if (local->no_pri)
1364 local->pda = NULL;
1365 else
1366 local->pda = prism2_read_pda(dev);
1367 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1368
1369 hfa384x_disable_interrupts(dev);
1370
1371 #ifndef final_version
1372 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1373 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1374 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1375 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1376 goto failed;
1377 }
1378 #endif
1379
1380 if (initial || local->pri_only) {
1381 hfa384x_events_only_cmd(dev);
1382 /* get card version information */
1383 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1384 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1385 hfa384x_disable_interrupts(dev);
1386 goto failed;
1387 }
1388
1389 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1390 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1391 "- only Primary f/w present\n", dev->name);
1392 local->pri_only = 1;
1393 return 0;
1394 }
1395 local->pri_only = 0;
1396 hfa384x_disable_interrupts(dev);
1397 }
1398
1399 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1400 * enable interrupts before this. This would also require some sort of
1401 * sleeping AllocEv waiting */
1402
1403 /* allocate TX FIDs */
1404 local->txfid_len = PRISM2_TXFID_LEN;
1405 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1406 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1407 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1408 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1409 if (local->txfid[i] != 0xffff) {
1410 printk(KERN_DEBUG "%s: Using shorter TX FID "
1411 "(1600 bytes)\n", dev->name);
1412 local->txfid_len = 1600;
1413 }
1414 }
1415 if (local->txfid[i] == 0xffff)
1416 goto failed;
1417 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1418 }
1419
1420 hfa384x_events_only_cmd(dev);
1421
1422 if (initial) {
1423 struct list_head *ptr;
1424 prism2_check_sta_fw_version(local);
1425
1426 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1427 &dev->dev_addr, 6, 1) < 0) {
1428 printk("%s: could not get own MAC address\n",
1429 dev->name);
1430 }
1431 list_for_each(ptr, &local->hostap_interfaces) {
1432 iface = list_entry(ptr, struct hostap_interface, list);
1433 memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1434 }
1435 } else if (local->fw_ap)
1436 prism2_check_sta_fw_version(local);
1437
1438 prism2_setup_rids(dev);
1439
1440 /* MAC is now configured, but port 0 is not yet enabled */
1441 return 0;
1442
1443 failed:
1444 if (!local->no_pri)
1445 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1446 return 1;
1447 }
1448
1449
1450 static int prism2_hw_enable(struct net_device *dev, int initial)
1451 {
1452 struct hostap_interface *iface;
1453 local_info_t *local;
1454 int was_resetting;
1455
1456 iface = netdev_priv(dev);
1457 local = iface->local;
1458 was_resetting = local->hw_resetting;
1459
1460 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1461 printk("%s: MAC port 0 enabling failed\n", dev->name);
1462 return 1;
1463 }
1464
1465 local->hw_ready = 1;
1466 local->hw_reset_tries = 0;
1467 local->hw_resetting = 0;
1468 hfa384x_enable_interrupts(dev);
1469
1470 /* at least D-Link DWL-650 seems to require additional port reset
1471 * before it starts acting as an AP, so reset port automatically
1472 * here just in case */
1473 if (initial && prism2_reset_port(dev)) {
1474 printk("%s: MAC port 0 reseting failed\n", dev->name);
1475 return 1;
1476 }
1477
1478 if (was_resetting && netif_queue_stopped(dev)) {
1479 /* If hw_reset() was called during pending transmit, netif
1480 * queue was stopped. Wake it up now since the wlan card has
1481 * been resetted. */
1482 netif_wake_queue(dev);
1483 }
1484
1485 return 0;
1486 }
1487
1488
1489 static int prism2_hw_config(struct net_device *dev, int initial)
1490 {
1491 struct hostap_interface *iface;
1492 local_info_t *local;
1493
1494 iface = netdev_priv(dev);
1495 local = iface->local;
1496
1497 if (local->hw_downloading)
1498 return 1;
1499
1500 if (prism2_hw_init(dev, initial)) {
1501 return local->no_pri ? 0 : 1;
1502 }
1503
1504 if (prism2_hw_init2(dev, initial))
1505 return 1;
1506
1507 /* Enable firmware if secondary image is loaded and at least one of the
1508 * netdevices is up. */
1509 if (!local->pri_only &&
1510 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1511 if (!local->dev_enabled)
1512 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1513 local->dev_enabled = 1;
1514 return prism2_hw_enable(dev, initial);
1515 }
1516
1517 return 0;
1518 }
1519
1520
1521 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1522 {
1523 struct hostap_interface *iface;
1524 local_info_t *local;
1525
1526 iface = netdev_priv(dev);
1527 local = iface->local;
1528
1529 /* Allow only command completion events during disable */
1530 hfa384x_events_only_cmd(dev);
1531
1532 local->hw_ready = 0;
1533 if (local->dev_enabled)
1534 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1535 local->dev_enabled = 0;
1536
1537 if (local->func->card_present && !local->func->card_present(local)) {
1538 printk(KERN_DEBUG "%s: card already removed or not configured "
1539 "during shutdown\n", dev->name);
1540 return;
1541 }
1542
1543 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1544 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1545 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1546
1547 hfa384x_disable_interrupts(dev);
1548
1549 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1550 hfa384x_events_only_cmd(dev);
1551 else
1552 prism2_clear_cmd_queue(local);
1553 }
1554
1555
1556 static void prism2_hw_reset(struct net_device *dev)
1557 {
1558 struct hostap_interface *iface;
1559 local_info_t *local;
1560
1561 #if 0
1562 static long last_reset = 0;
1563
1564 /* do not reset card more than once per second to avoid ending up in a
1565 * busy loop reseting the card */
1566 if (time_before_eq(jiffies, last_reset + HZ))
1567 return;
1568 last_reset = jiffies;
1569 #endif
1570
1571 iface = netdev_priv(dev);
1572 local = iface->local;
1573
1574 if (in_interrupt()) {
1575 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1576 "in interrupt context\n", dev->name);
1577 return;
1578 }
1579
1580 if (local->hw_downloading)
1581 return;
1582
1583 if (local->hw_resetting) {
1584 printk(KERN_WARNING "%s: %s: already resetting card - "
1585 "ignoring reset request\n", dev_info, dev->name);
1586 return;
1587 }
1588
1589 local->hw_reset_tries++;
1590 if (local->hw_reset_tries > 10) {
1591 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1592 dev->name);
1593 return;
1594 }
1595
1596 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1597 hfa384x_disable_interrupts(dev);
1598 local->hw_resetting = 1;
1599 if (local->func->cor_sreset) {
1600 /* Host system seems to hang in some cases with high traffic
1601 * load or shared interrupts during COR sreset. Disable shared
1602 * interrupts during reset to avoid these crashes. COS sreset
1603 * takes quite a long time, so it is unfortunate that this
1604 * seems to be needed. Anyway, I do not know of any better way
1605 * of avoiding the crash. */
1606 disable_irq(dev->irq);
1607 local->func->cor_sreset(local);
1608 enable_irq(dev->irq);
1609 }
1610 prism2_hw_shutdown(dev, 1);
1611 prism2_hw_config(dev, 0);
1612 local->hw_resetting = 0;
1613
1614 #ifdef PRISM2_DOWNLOAD_SUPPORT
1615 if (local->dl_pri) {
1616 printk(KERN_DEBUG "%s: persistent download of primary "
1617 "firmware\n", dev->name);
1618 if (prism2_download_genesis(local, local->dl_pri) < 0)
1619 printk(KERN_WARNING "%s: download (PRI) failed\n",
1620 dev->name);
1621 }
1622
1623 if (local->dl_sec) {
1624 printk(KERN_DEBUG "%s: persistent download of secondary "
1625 "firmware\n", dev->name);
1626 if (prism2_download_volatile(local, local->dl_sec) < 0)
1627 printk(KERN_WARNING "%s: download (SEC) failed\n",
1628 dev->name);
1629 }
1630 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1631
1632 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1633 }
1634
1635
1636 static void prism2_schedule_reset(local_info_t *local)
1637 {
1638 schedule_work(&local->reset_queue);
1639 }
1640
1641
1642 /* Called only as scheduled task after noticing card timeout in interrupt
1643 * context */
1644 static void handle_reset_queue(struct work_struct *work)
1645 {
1646 local_info_t *local = container_of(work, local_info_t, reset_queue);
1647
1648 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1649 prism2_hw_reset(local->dev);
1650
1651 if (netif_queue_stopped(local->dev)) {
1652 int i;
1653
1654 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1655 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1656 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1657 "wake up queue\n");
1658 netif_wake_queue(local->dev);
1659 break;
1660 }
1661 }
1662 }
1663
1664
1665 static int prism2_get_txfid_idx(local_info_t *local)
1666 {
1667 int idx, end;
1668 unsigned long flags;
1669
1670 spin_lock_irqsave(&local->txfidlock, flags);
1671 end = idx = local->next_txfid;
1672 do {
1673 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1674 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1675 spin_unlock_irqrestore(&local->txfidlock, flags);
1676 return idx;
1677 }
1678 idx++;
1679 if (idx >= PRISM2_TXFID_COUNT)
1680 idx = 0;
1681 } while (idx != end);
1682 spin_unlock_irqrestore(&local->txfidlock, flags);
1683
1684 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1685 "packet dropped\n");
1686 local->stats.tx_dropped++;
1687
1688 return -1;
1689 }
1690
1691
1692 /* Called only from hardware IRQ */
1693 static void prism2_transmit_cb(struct net_device *dev, long context,
1694 u16 resp0, u16 res)
1695 {
1696 struct hostap_interface *iface;
1697 local_info_t *local;
1698 int idx = (int) context;
1699
1700 iface = netdev_priv(dev);
1701 local = iface->local;
1702
1703 if (res) {
1704 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1705 dev->name, res);
1706 return;
1707 }
1708
1709 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1710 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1711 "idx=%d\n", dev->name, idx);
1712 return;
1713 }
1714
1715 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1716 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1717 "with no pending transmit\n", dev->name);
1718 }
1719
1720 if (netif_queue_stopped(dev)) {
1721 /* ready for next TX, so wake up queue that was stopped in
1722 * prism2_transmit() */
1723 netif_wake_queue(dev);
1724 }
1725
1726 spin_lock(&local->txfidlock);
1727
1728 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1729 * will be automatically allocated for the next TX frame */
1730 local->intransmitfid[idx] = resp0;
1731
1732 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1733 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1734 dev->name, idx, local->txfid[idx],
1735 resp0, local->intransmitfid[local->next_txfid]);
1736
1737 idx++;
1738 if (idx >= PRISM2_TXFID_COUNT)
1739 idx = 0;
1740 local->next_txfid = idx;
1741
1742 /* check if all TX buffers are occupied */
1743 do {
1744 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1745 spin_unlock(&local->txfidlock);
1746 return;
1747 }
1748 idx++;
1749 if (idx >= PRISM2_TXFID_COUNT)
1750 idx = 0;
1751 } while (idx != local->next_txfid);
1752 spin_unlock(&local->txfidlock);
1753
1754 /* no empty TX buffers, stop queue */
1755 netif_stop_queue(dev);
1756 }
1757
1758
1759 /* Called only from software IRQ if PCI bus master is not used (with bus master
1760 * this can be called both from software and hardware IRQ) */
1761 static int prism2_transmit(struct net_device *dev, int idx)
1762 {
1763 struct hostap_interface *iface;
1764 local_info_t *local;
1765 int res;
1766
1767 iface = netdev_priv(dev);
1768 local = iface->local;
1769
1770 /* The driver tries to stop netif queue so that there would not be
1771 * more than one attempt to transmit frames going on; check that this
1772 * is really the case */
1773
1774 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1775 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1776 "when previous TX was pending\n", dev->name);
1777 return -1;
1778 }
1779
1780 /* stop the queue for the time that transmit is pending */
1781 netif_stop_queue(dev);
1782
1783 /* transmit packet */
1784 res = hfa384x_cmd_callback(
1785 dev,
1786 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1787 local->txfid[idx],
1788 prism2_transmit_cb, (long) idx);
1789
1790 if (res) {
1791 struct net_device_stats *stats;
1792 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1793 "failed (res=%d)\n", dev->name, res);
1794 stats = hostap_get_stats(dev);
1795 stats->tx_dropped++;
1796 netif_wake_queue(dev);
1797 return -1;
1798 }
1799 dev->trans_start = jiffies;
1800
1801 /* Since we did not wait for command completion, the card continues
1802 * to process on the background and we will finish handling when
1803 * command completion event is handled (prism2_cmd_ev() function) */
1804
1805 return 0;
1806 }
1807
1808
1809 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1810 * send the payload with this descriptor) */
1811 /* Called only from software IRQ */
1812 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1813 {
1814 struct hostap_interface *iface;
1815 local_info_t *local;
1816 struct hfa384x_tx_frame txdesc;
1817 struct hostap_skb_tx_data *meta;
1818 int hdr_len, data_len, idx, res, ret = -1;
1819 u16 tx_control, fc;
1820
1821 iface = netdev_priv(dev);
1822 local = iface->local;
1823
1824 meta = (struct hostap_skb_tx_data *) skb->cb;
1825
1826 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1827
1828 if ((local->func->card_present && !local->func->card_present(local)) ||
1829 !local->hw_ready || local->hw_downloading || local->pri_only) {
1830 if (net_ratelimit()) {
1831 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1832 " skipping\n", dev->name);
1833 }
1834 goto fail;
1835 }
1836
1837 memset(&txdesc, 0, sizeof(txdesc));
1838
1839 /* skb->data starts with txdesc->frame_control */
1840 hdr_len = 24;
1841 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1842 fc = le16_to_cpu(txdesc.frame_control);
1843 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
1844 (fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS) &&
1845 skb->len >= 30) {
1846 /* Addr4 */
1847 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1848 ETH_ALEN);
1849 hdr_len += ETH_ALEN;
1850 }
1851
1852 tx_control = local->tx_control;
1853 if (meta->tx_cb_idx) {
1854 tx_control |= HFA384X_TX_CTRL_TX_OK;
1855 txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
1856 }
1857 txdesc.tx_control = cpu_to_le16(tx_control);
1858 txdesc.tx_rate = meta->rate;
1859
1860 data_len = skb->len - hdr_len;
1861 txdesc.data_len = cpu_to_le16(data_len);
1862 txdesc.len = cpu_to_be16(data_len);
1863
1864 idx = prism2_get_txfid_idx(local);
1865 if (idx < 0)
1866 goto fail;
1867
1868 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1869 hostap_dump_tx_header(dev->name, &txdesc);
1870
1871 spin_lock(&local->baplock);
1872 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1873
1874 if (!res)
1875 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1876 if (!res)
1877 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1878 skb->len - hdr_len);
1879 spin_unlock(&local->baplock);
1880
1881 if (!res)
1882 res = prism2_transmit(dev, idx);
1883 if (res) {
1884 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1885 dev->name);
1886 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1887 schedule_work(&local->reset_queue);
1888 goto fail;
1889 }
1890
1891 ret = 0;
1892
1893 fail:
1894 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1895 return ret;
1896 }
1897
1898
1899 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1900 * register has changed values between consecutive reads for an unknown reason.
1901 * This should really not happen, so more debugging is needed. This test
1902 * version is a big slower, but it will detect most of such register changes
1903 * and will try to get the correct fid eventually. */
1904 #define EXTRA_FID_READ_TESTS
1905
1906 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1907 {
1908 #ifdef EXTRA_FID_READ_TESTS
1909 u16 val, val2, val3;
1910 int i;
1911
1912 for (i = 0; i < 10; i++) {
1913 val = HFA384X_INW(reg);
1914 val2 = HFA384X_INW(reg);
1915 val3 = HFA384X_INW(reg);
1916
1917 if (val == val2 && val == val3)
1918 return val;
1919
1920 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1921 " %04x %04x %04x\n",
1922 dev->name, i, reg, val, val2, val3);
1923 if ((val == val2 || val == val3) && val != 0)
1924 return val;
1925 if (val2 == val3 && val2 != 0)
1926 return val2;
1927 }
1928 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1929 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1930 return val;
1931 #else /* EXTRA_FID_READ_TESTS */
1932 return HFA384X_INW(reg);
1933 #endif /* EXTRA_FID_READ_TESTS */
1934 }
1935
1936
1937 /* Called only as a tasklet (software IRQ) */
1938 static void prism2_rx(local_info_t *local)
1939 {
1940 struct net_device *dev = local->dev;
1941 int res, rx_pending = 0;
1942 u16 len, hdr_len, rxfid, status, macport;
1943 struct net_device_stats *stats;
1944 struct hfa384x_rx_frame rxdesc;
1945 struct sk_buff *skb = NULL;
1946
1947 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1948 stats = hostap_get_stats(dev);
1949
1950 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1951 #ifndef final_version
1952 if (rxfid == 0) {
1953 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1954 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1955 rxfid);
1956 if (rxfid == 0) {
1957 schedule_work(&local->reset_queue);
1958 goto rx_dropped;
1959 }
1960 /* try to continue with the new rxfid value */
1961 }
1962 #endif
1963
1964 spin_lock(&local->baplock);
1965 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1966 if (!res)
1967 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1968
1969 if (res) {
1970 spin_unlock(&local->baplock);
1971 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1972 res);
1973 if (res == -ETIMEDOUT) {
1974 schedule_work(&local->reset_queue);
1975 }
1976 goto rx_dropped;
1977 }
1978
1979 len = le16_to_cpu(rxdesc.data_len);
1980 hdr_len = sizeof(rxdesc);
1981 status = le16_to_cpu(rxdesc.status);
1982 macport = (status >> 8) & 0x07;
1983
1984 /* Drop frames with too large reported payload length. Monitor mode
1985 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1986 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1987 * macport 7 */
1988 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1989 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1990 if (len >= (u16) -14) {
1991 hdr_len -= 65535 - len;
1992 hdr_len--;
1993 }
1994 len = 0;
1995 } else {
1996 spin_unlock(&local->baplock);
1997 printk(KERN_DEBUG "%s: Received frame with invalid "
1998 "length 0x%04x\n", dev->name, len);
1999 hostap_dump_rx_header(dev->name, &rxdesc);
2000 goto rx_dropped;
2001 }
2002 }
2003
2004 skb = dev_alloc_skb(len + hdr_len);
2005 if (!skb) {
2006 spin_unlock(&local->baplock);
2007 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2008 dev->name);
2009 goto rx_dropped;
2010 }
2011 skb->dev = dev;
2012 memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2013
2014 if (len > 0)
2015 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2016 spin_unlock(&local->baplock);
2017 if (res) {
2018 printk(KERN_DEBUG "%s: RX failed to read "
2019 "frame data\n", dev->name);
2020 goto rx_dropped;
2021 }
2022
2023 skb_queue_tail(&local->rx_list, skb);
2024 tasklet_schedule(&local->rx_tasklet);
2025
2026 rx_exit:
2027 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2028 if (!rx_pending) {
2029 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2030 }
2031
2032 return;
2033
2034 rx_dropped:
2035 stats->rx_dropped++;
2036 if (skb)
2037 dev_kfree_skb(skb);
2038 goto rx_exit;
2039 }
2040
2041
2042 /* Called only as a tasklet (software IRQ) */
2043 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2044 {
2045 struct hfa384x_rx_frame *rxdesc;
2046 struct net_device *dev = skb->dev;
2047 struct hostap_80211_rx_status stats;
2048 int hdrlen, rx_hdrlen;
2049
2050 rx_hdrlen = sizeof(*rxdesc);
2051 if (skb->len < sizeof(*rxdesc)) {
2052 /* Allow monitor mode to receive shorter frames */
2053 if (local->iw_mode == IW_MODE_MONITOR &&
2054 skb->len >= sizeof(*rxdesc) - 30) {
2055 rx_hdrlen = skb->len;
2056 } else {
2057 dev_kfree_skb(skb);
2058 return;
2059 }
2060 }
2061
2062 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2063
2064 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2065 skb->len >= sizeof(*rxdesc))
2066 hostap_dump_rx_header(dev->name, rxdesc);
2067
2068 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2069 (!local->monitor_allow_fcserr ||
2070 local->iw_mode != IW_MODE_MONITOR))
2071 goto drop;
2072
2073 if (skb->len > PRISM2_DATA_MAXLEN) {
2074 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2075 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2076 goto drop;
2077 }
2078
2079 stats.mac_time = le32_to_cpu(rxdesc->time);
2080 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2081 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2082 stats.rate = rxdesc->rate;
2083
2084 /* Convert Prism2 RX structure into IEEE 802.11 header */
2085 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
2086 if (hdrlen > rx_hdrlen)
2087 hdrlen = rx_hdrlen;
2088
2089 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2090 &rxdesc->frame_control, hdrlen);
2091
2092 hostap_80211_rx(dev, skb, &stats);
2093 return;
2094
2095 drop:
2096 dev_kfree_skb(skb);
2097 }
2098
2099
2100 /* Called only as a tasklet (software IRQ) */
2101 static void hostap_rx_tasklet(unsigned long data)
2102 {
2103 local_info_t *local = (local_info_t *) data;
2104 struct sk_buff *skb;
2105
2106 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2107 hostap_rx_skb(local, skb);
2108 }
2109
2110
2111 /* Called only from hardware IRQ */
2112 static void prism2_alloc_ev(struct net_device *dev)
2113 {
2114 struct hostap_interface *iface;
2115 local_info_t *local;
2116 int idx;
2117 u16 fid;
2118
2119 iface = netdev_priv(dev);
2120 local = iface->local;
2121
2122 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2123
2124 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2125
2126 spin_lock(&local->txfidlock);
2127 idx = local->next_alloc;
2128
2129 do {
2130 if (local->txfid[idx] == fid) {
2131 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2132 idx);
2133
2134 #ifndef final_version
2135 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2136 printk("Already released txfid found at idx "
2137 "%d\n", idx);
2138 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2139 printk("Already reserved txfid found at idx "
2140 "%d\n", idx);
2141 #endif
2142 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2143 idx++;
2144 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2145 idx;
2146
2147 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2148 netif_queue_stopped(dev))
2149 netif_wake_queue(dev);
2150
2151 spin_unlock(&local->txfidlock);
2152 return;
2153 }
2154
2155 idx++;
2156 if (idx >= PRISM2_TXFID_COUNT)
2157 idx = 0;
2158 } while (idx != local->next_alloc);
2159
2160 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2161 "read 0x%04x) for alloc event\n", dev->name, fid,
2162 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2163 printk(KERN_DEBUG "TXFIDs:");
2164 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2165 printk(" %04x[%04x]", local->txfid[idx],
2166 local->intransmitfid[idx]);
2167 printk("\n");
2168 spin_unlock(&local->txfidlock);
2169
2170 /* FIX: should probably schedule reset; reference to one txfid was lost
2171 * completely.. Bad things will happen if we run out of txfids
2172 * Actually, this will cause netdev watchdog to notice TX timeout and
2173 * then card reset after all txfids have been leaked. */
2174 }
2175
2176
2177 /* Called only as a tasklet (software IRQ) */
2178 static void hostap_tx_callback(local_info_t *local,
2179 struct hfa384x_tx_frame *txdesc, int ok,
2180 char *payload)
2181 {
2182 u16 sw_support, hdrlen, len;
2183 struct sk_buff *skb;
2184 struct hostap_tx_callback_info *cb;
2185
2186 /* Make sure that frame was from us. */
2187 if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2188 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2189 local->dev->name);
2190 return;
2191 }
2192
2193 sw_support = le16_to_cpu(txdesc->sw_support);
2194
2195 spin_lock(&local->lock);
2196 cb = local->tx_callback;
2197 while (cb != NULL && cb->idx != sw_support)
2198 cb = cb->next;
2199 spin_unlock(&local->lock);
2200
2201 if (cb == NULL) {
2202 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2203 local->dev->name, sw_support);
2204 return;
2205 }
2206
2207 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
2208 len = le16_to_cpu(txdesc->data_len);
2209 skb = dev_alloc_skb(hdrlen + len);
2210 if (skb == NULL) {
2211 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2212 "skb\n", local->dev->name);
2213 return;
2214 }
2215
2216 memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2217 if (payload)
2218 memcpy(skb_put(skb, len), payload, len);
2219
2220 skb->dev = local->dev;
2221 skb_reset_mac_header(skb);
2222
2223 cb->func(skb, ok, cb->data);
2224 }
2225
2226
2227 /* Called only as a tasklet (software IRQ) */
2228 static int hostap_tx_compl_read(local_info_t *local, int error,
2229 struct hfa384x_tx_frame *txdesc,
2230 char **payload)
2231 {
2232 u16 fid, len;
2233 int res, ret = 0;
2234 struct net_device *dev = local->dev;
2235
2236 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2237
2238 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2239
2240 spin_lock(&local->baplock);
2241 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2242 if (!res)
2243 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2244 if (res) {
2245 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2246 "read txdesc\n", dev->name, error, fid);
2247 if (res == -ETIMEDOUT) {
2248 schedule_work(&local->reset_queue);
2249 }
2250 ret = -1;
2251 goto fail;
2252 }
2253 if (txdesc->sw_support) {
2254 len = le16_to_cpu(txdesc->data_len);
2255 if (len < PRISM2_DATA_MAXLEN) {
2256 *payload = kmalloc(len, GFP_ATOMIC);
2257 if (*payload == NULL ||
2258 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2259 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2260 "frame payload\n", dev->name);
2261 kfree(*payload);
2262 *payload = NULL;
2263 ret = -1;
2264 goto fail;
2265 }
2266 }
2267 }
2268
2269 fail:
2270 spin_unlock(&local->baplock);
2271
2272 return ret;
2273 }
2274
2275
2276 /* Called only as a tasklet (software IRQ) */
2277 static void prism2_tx_ev(local_info_t *local)
2278 {
2279 struct net_device *dev = local->dev;
2280 char *payload = NULL;
2281 struct hfa384x_tx_frame txdesc;
2282
2283 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2284 goto fail;
2285
2286 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2287 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2288 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2289 "duration_id=%d\n",
2290 dev->name, le16_to_cpu(txdesc.status),
2291 txdesc.retry_count, txdesc.tx_rate,
2292 le16_to_cpu(txdesc.seq_ctrl),
2293 le16_to_cpu(txdesc.duration_id));
2294 }
2295
2296 if (txdesc.sw_support)
2297 hostap_tx_callback(local, &txdesc, 1, payload);
2298 kfree(payload);
2299
2300 fail:
2301 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2302 }
2303
2304
2305 /* Called only as a tasklet (software IRQ) */
2306 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2307 {
2308 local_info_t *local = (local_info_t *) data;
2309 struct sk_buff *skb;
2310
2311 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2312 struct hfa384x_tx_frame *txdesc =
2313 (struct hfa384x_tx_frame *) skb->data;
2314
2315 if (skb->len >= sizeof(*txdesc)) {
2316 /* Convert Prism2 RX structure into IEEE 802.11 header
2317 */
2318 u16 fc = le16_to_cpu(txdesc->frame_control);
2319 int hdrlen = hostap_80211_get_hdrlen(fc);
2320 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2321 &txdesc->frame_control, hdrlen);
2322
2323 hostap_handle_sta_tx_exc(local, skb);
2324 }
2325 dev_kfree_skb(skb);
2326 }
2327 }
2328
2329
2330 /* Called only as a tasklet (software IRQ) */
2331 static void prism2_txexc(local_info_t *local)
2332 {
2333 struct net_device *dev = local->dev;
2334 u16 status, fc;
2335 int show_dump, res;
2336 char *payload = NULL;
2337 struct hfa384x_tx_frame txdesc;
2338 DECLARE_MAC_BUF(mac);
2339 DECLARE_MAC_BUF(mac2);
2340 DECLARE_MAC_BUF(mac3);
2341 DECLARE_MAC_BUF(mac4);
2342
2343 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2344 local->stats.tx_errors++;
2345
2346 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2347 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2348 if (res)
2349 return;
2350
2351 status = le16_to_cpu(txdesc.status);
2352
2353 /* We produce a TXDROP event only for retry or lifetime
2354 * exceeded, because that's the only status that really mean
2355 * that this particular node went away.
2356 * Other errors means that *we* screwed up. - Jean II */
2357 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2358 {
2359 union iwreq_data wrqu;
2360
2361 /* Copy 802.11 dest address. */
2362 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2363 wrqu.addr.sa_family = ARPHRD_ETHER;
2364 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2365 } else
2366 show_dump = 1;
2367
2368 if (local->iw_mode == IW_MODE_MASTER ||
2369 local->iw_mode == IW_MODE_REPEAT ||
2370 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2371 struct sk_buff *skb;
2372 skb = dev_alloc_skb(sizeof(txdesc));
2373 if (skb) {
2374 memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2375 sizeof(txdesc));
2376 skb_queue_tail(&local->sta_tx_exc_list, skb);
2377 tasklet_schedule(&local->sta_tx_exc_tasklet);
2378 }
2379 }
2380
2381 if (txdesc.sw_support)
2382 hostap_tx_callback(local, &txdesc, 0, payload);
2383 kfree(payload);
2384
2385 if (!show_dump)
2386 return;
2387
2388 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2389 " tx_control=%04x\n",
2390 dev->name, status,
2391 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2392 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2393 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2394 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2395 le16_to_cpu(txdesc.tx_control));
2396
2397 fc = le16_to_cpu(txdesc.frame_control);
2398 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2399 "(%s%s%s::%d%s%s)\n",
2400 txdesc.retry_count, txdesc.tx_rate, fc,
2401 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT ? "Mgmt" : "",
2402 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL ? "Ctrl" : "",
2403 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA ? "Data" : "",
2404 WLAN_FC_GET_STYPE(fc) >> 4,
2405 fc & IEEE80211_FCTL_TODS ? " ToDS" : "",
2406 fc & IEEE80211_FCTL_FROMDS ? " FromDS" : "");
2407 PDEBUG(DEBUG_EXTRA, " A1=%s A2=%s A3=%s A4=%s\n",
2408 print_mac(mac, txdesc.addr1), print_mac(mac2, txdesc.addr2),
2409 print_mac(mac3, txdesc.addr3), print_mac(mac4, 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 = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
3020 if (new_entry == NULL) {
3021 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
3022 local->dev->name);
3023 return -ENOMEM;
3024 }
3025 new_entry->aid = aid;
3026 new_entry->set = set;
3027
3028 spin_lock_bh(&local->set_tim_lock);
3029 list_for_each(ptr, &local->set_tim_list) {
3030 struct set_tim_data *entry =
3031 list_entry(ptr, struct set_tim_data, list);
3032 if (entry->aid == aid) {
3033 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3034 "set=%d ==> %d\n",
3035 local->dev->name, aid, entry->set, set);
3036 entry->set = set;
3037 kfree(new_entry);
3038 new_entry = NULL;
3039 break;
3040 }
3041 }
3042 if (new_entry)
3043 list_add_tail(&new_entry->list, &local->set_tim_list);
3044 spin_unlock_bh(&local->set_tim_lock);
3045
3046 schedule_work(&local->set_tim_queue);
3047
3048 return 0;
3049 }
3050
3051
3052 static void handle_set_tim_queue(struct work_struct *work)
3053 {
3054 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3055 struct set_tim_data *entry;
3056 u16 val;
3057
3058 for (;;) {
3059 entry = NULL;
3060 spin_lock_bh(&local->set_tim_lock);
3061 if (!list_empty(&local->set_tim_list)) {
3062 entry = list_entry(local->set_tim_list.next,
3063 struct set_tim_data, list);
3064 list_del(&entry->list);
3065 }
3066 spin_unlock_bh(&local->set_tim_lock);
3067 if (!entry)
3068 break;
3069
3070 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3071 local->dev->name, entry->aid, entry->set);
3072
3073 val = entry->aid;
3074 if (entry->set)
3075 val |= 0x8000;
3076 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3077 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3078 "set=%d)\n",
3079 local->dev->name, entry->aid, entry->set);
3080 }
3081
3082 kfree(entry);
3083 }
3084 }
3085
3086
3087 static void prism2_clear_set_tim_queue(local_info_t *local)
3088 {
3089 struct list_head *ptr, *n;
3090
3091 list_for_each_safe(ptr, n, &local->set_tim_list) {
3092 struct set_tim_data *entry;
3093 entry = list_entry(ptr, struct set_tim_data, list);
3094 list_del(&entry->list);
3095 kfree(entry);
3096 }
3097 }
3098
3099
3100 /*
3101 * HostAP uses two layers of net devices, where the inner
3102 * layer gets called all the time from the outer layer.
3103 * This is a natural nesting, which needs a split lock type.
3104 */
3105 static struct lock_class_key hostap_netdev_xmit_lock_key;
3106
3107
3108 static struct net_device *
3109 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3110 struct device *sdev)
3111 {
3112 struct net_device *dev;
3113 struct hostap_interface *iface;
3114 struct local_info *local;
3115 int len, i, ret;
3116
3117 if (funcs == NULL)
3118 return NULL;
3119
3120 len = strlen(dev_template);
3121 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3122 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3123 dev_template);
3124 return NULL;
3125 }
3126
3127 len = sizeof(struct hostap_interface) +
3128 3 + sizeof(struct local_info) +
3129 3 + sizeof(struct ap_data);
3130
3131 dev = alloc_etherdev(len);
3132 if (dev == NULL)
3133 return NULL;
3134
3135 iface = netdev_priv(dev);
3136 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3137 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3138 local->dev = iface->dev = dev;
3139 iface->local = local;
3140 iface->type = HOSTAP_INTERFACE_MASTER;
3141 INIT_LIST_HEAD(&local->hostap_interfaces);
3142
3143 local->hw_module = THIS_MODULE;
3144
3145 #ifdef PRISM2_IO_DEBUG
3146 local->io_debug_enabled = 1;
3147 #endif /* PRISM2_IO_DEBUG */
3148
3149 local->func = funcs;
3150 local->func->cmd = hfa384x_cmd;
3151 local->func->read_regs = hfa384x_read_regs;
3152 local->func->get_rid = hfa384x_get_rid;
3153 local->func->set_rid = hfa384x_set_rid;
3154 local->func->hw_enable = prism2_hw_enable;
3155 local->func->hw_config = prism2_hw_config;
3156 local->func->hw_reset = prism2_hw_reset;
3157 local->func->hw_shutdown = prism2_hw_shutdown;
3158 local->func->reset_port = prism2_reset_port;
3159 local->func->schedule_reset = prism2_schedule_reset;
3160 #ifdef PRISM2_DOWNLOAD_SUPPORT
3161 local->func->read_aux = prism2_download_aux_dump;
3162 local->func->download = prism2_download;
3163 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3164 local->func->tx = prism2_tx_80211;
3165 local->func->set_tim = prism2_set_tim;
3166 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3167 * skb->data (FIX: maybe for DMA bus
3168 * mastering? */
3169
3170 local->mtu = mtu;
3171
3172 rwlock_init(&local->iface_lock);
3173 spin_lock_init(&local->txfidlock);
3174 spin_lock_init(&local->cmdlock);
3175 spin_lock_init(&local->baplock);
3176 spin_lock_init(&local->lock);
3177 mutex_init(&local->rid_bap_mtx);
3178
3179 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3180 card_idx = 0;
3181 local->card_idx = card_idx;
3182
3183 len = strlen(essid);
3184 memcpy(local->essid, essid,
3185 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3186 local->essid[MAX_SSID_LEN] = '\0';
3187 i = GET_INT_PARM(iw_mode, card_idx);
3188 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3189 i == IW_MODE_MONITOR) {
3190 local->iw_mode = i;
3191 } else {
3192 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3193 "IW_MODE_MASTER\n", i);
3194 local->iw_mode = IW_MODE_MASTER;
3195 }
3196 local->channel = GET_INT_PARM(channel, card_idx);
3197 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3198 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3199 local->wds_max_connections = 16;
3200 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3201 local->manual_retry_count = -1;
3202 local->rts_threshold = 2347;
3203 local->fragm_threshold = 2346;
3204 local->rssi_to_dBm = 100; /* default; to be overriden by
3205 * cnfDbmAdjust, if available */
3206 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3207 local->sram_type = -1;
3208 local->scan_channel_mask = 0xffff;
3209
3210 /* Initialize task queue structures */
3211 INIT_WORK(&local->reset_queue, handle_reset_queue);
3212 INIT_WORK(&local->set_multicast_list_queue,
3213 hostap_set_multicast_list_queue);
3214
3215 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3216 INIT_LIST_HEAD(&local->set_tim_list);
3217 spin_lock_init(&local->set_tim_lock);
3218
3219 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3220
3221 /* Initialize tasklets for handling hardware IRQ related operations
3222 * outside hw IRQ handler */
3223 #define HOSTAP_TASKLET_INIT(q, f, d) \
3224 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3225 while (0)
3226 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3227 (unsigned long) local);
3228
3229 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3230 (unsigned long) local);
3231 hostap_info_init(local);
3232
3233 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3234 hostap_rx_tasklet, (unsigned long) local);
3235 skb_queue_head_init(&local->rx_list);
3236
3237 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3238 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3239 skb_queue_head_init(&local->sta_tx_exc_list);
3240
3241 INIT_LIST_HEAD(&local->cmd_queue);
3242 init_waitqueue_head(&local->hostscan_wq);
3243 INIT_LIST_HEAD(&local->crypt_deinit_list);
3244 init_timer(&local->crypt_deinit_timer);
3245 local->crypt_deinit_timer.data = (unsigned long) local;
3246 local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
3247
3248 init_timer(&local->passive_scan_timer);
3249 local->passive_scan_timer.data = (unsigned long) local;
3250 local->passive_scan_timer.function = hostap_passive_scan;
3251
3252 init_timer(&local->tick_timer);
3253 local->tick_timer.data = (unsigned long) local;
3254 local->tick_timer.function = hostap_tick_timer;
3255 local->tick_timer.expires = jiffies + 2 * HZ;
3256 add_timer(&local->tick_timer);
3257
3258 INIT_LIST_HEAD(&local->bss_list);
3259
3260 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3261
3262 dev->hard_start_xmit = hostap_master_start_xmit;
3263 dev->type = ARPHRD_IEEE80211;
3264 dev->header_ops = &hostap_80211_ops;
3265
3266 rtnl_lock();
3267 ret = dev_alloc_name(dev, "wifi%d");
3268 SET_NETDEV_DEV(dev, sdev);
3269 if (ret >= 0)
3270 ret = register_netdevice(dev);
3271
3272 lockdep_set_class(&dev->_xmit_lock, &hostap_netdev_xmit_lock_key);
3273 rtnl_unlock();
3274 if (ret < 0) {
3275 printk(KERN_WARNING "%s: register netdevice failed!\n",
3276 dev_info);
3277 goto fail;
3278 }
3279 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3280
3281 #ifndef PRISM2_NO_PROCFS_DEBUG
3282 create_proc_read_entry("registers", 0, local->proc,
3283 prism2_registers_proc_read, local);
3284 #endif /* PRISM2_NO_PROCFS_DEBUG */
3285
3286 hostap_init_data(local);
3287 return dev;
3288
3289 fail:
3290 free_netdev(dev);
3291 return NULL;
3292 }
3293
3294
3295 static int hostap_hw_ready(struct net_device *dev)
3296 {
3297 struct hostap_interface *iface;
3298 struct local_info *local;
3299
3300 iface = netdev_priv(dev);
3301 local = iface->local;
3302 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3303 "", dev_template);
3304
3305 if (local->ddev) {
3306 if (local->iw_mode == IW_MODE_INFRA ||
3307 local->iw_mode == IW_MODE_ADHOC) {
3308 netif_carrier_off(local->dev);
3309 netif_carrier_off(local->ddev);
3310 }
3311 hostap_init_proc(local);
3312 hostap_init_ap_proc(local);
3313 return 0;
3314 }
3315
3316 return -1;
3317 }
3318
3319
3320 static void prism2_free_local_data(struct net_device *dev)
3321 {
3322 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3323 int i;
3324 struct hostap_interface *iface;
3325 struct local_info *local;
3326 struct list_head *ptr, *n;
3327
3328 if (dev == NULL)
3329 return;
3330
3331 iface = netdev_priv(dev);
3332 local = iface->local;
3333
3334 /* Unregister all netdevs before freeing local data. */
3335 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3336 iface = list_entry(ptr, struct hostap_interface, list);
3337 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3338 /* special handling for this interface below */
3339 continue;
3340 }
3341 hostap_remove_interface(iface->dev, 0, 1);
3342 }
3343
3344 unregister_netdev(local->dev);
3345
3346 flush_scheduled_work();
3347
3348 if (timer_pending(&local->crypt_deinit_timer))
3349 del_timer(&local->crypt_deinit_timer);
3350 prism2_crypt_deinit_entries(local, 1);
3351
3352 if (timer_pending(&local->passive_scan_timer))
3353 del_timer(&local->passive_scan_timer);
3354
3355 if (timer_pending(&local->tick_timer))
3356 del_timer(&local->tick_timer);
3357
3358 prism2_clear_cmd_queue(local);
3359
3360 skb_queue_purge(&local->info_list);
3361 skb_queue_purge(&local->rx_list);
3362 skb_queue_purge(&local->sta_tx_exc_list);
3363
3364 if (local->dev_enabled)
3365 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3366
3367 for (i = 0; i < WEP_KEYS; i++) {
3368 struct ieee80211_crypt_data *crypt = local->crypt[i];
3369 if (crypt) {
3370 if (crypt->ops)
3371 crypt->ops->deinit(crypt->priv);
3372 kfree(crypt);
3373 local->crypt[i] = NULL;
3374 }
3375 }
3376
3377 if (local->ap != NULL)
3378 hostap_free_data(local->ap);
3379
3380 #ifndef PRISM2_NO_PROCFS_DEBUG
3381 if (local->proc != NULL)
3382 remove_proc_entry("registers", local->proc);
3383 #endif /* PRISM2_NO_PROCFS_DEBUG */
3384 hostap_remove_proc(local);
3385
3386 tx_cb = local->tx_callback;
3387 while (tx_cb != NULL) {
3388 tx_cb_prev = tx_cb;
3389 tx_cb = tx_cb->next;
3390 kfree(tx_cb_prev);
3391 }
3392
3393 hostap_set_hostapd(local, 0, 0);
3394 hostap_set_hostapd_sta(local, 0, 0);
3395
3396 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3397 if (local->frag_cache[i].skb != NULL)
3398 dev_kfree_skb(local->frag_cache[i].skb);
3399 }
3400
3401 #ifdef PRISM2_DOWNLOAD_SUPPORT
3402 prism2_download_free_data(local->dl_pri);
3403 prism2_download_free_data(local->dl_sec);
3404 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3405
3406 prism2_clear_set_tim_queue(local);
3407
3408 list_for_each_safe(ptr, n, &local->bss_list) {
3409 struct hostap_bss_info *bss =
3410 list_entry(ptr, struct hostap_bss_info, list);
3411 kfree(bss);
3412 }
3413
3414 kfree(local->pda);
3415 kfree(local->last_scan_results);
3416 kfree(local->generic_elem);
3417
3418 free_netdev(local->dev);
3419 }
3420
3421
3422 #ifndef PRISM2_PLX
3423 static void prism2_suspend(struct net_device *dev)
3424 {
3425 struct hostap_interface *iface;
3426 struct local_info *local;
3427 union iwreq_data wrqu;
3428
3429 iface = netdev_priv(dev);
3430 local = iface->local;
3431
3432 /* Send disconnect event, e.g., to trigger reassociation after resume
3433 * if wpa_supplicant is used. */
3434 memset(&wrqu, 0, sizeof(wrqu));
3435 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3436 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3437
3438 /* Disable hardware and firmware */
3439 prism2_hw_shutdown(dev, 0);
3440 }
3441 #endif /* PRISM2_PLX */
3442
3443
3444 /* These might at some point be compiled separately and used as separate
3445 * kernel modules or linked into one */
3446 #ifdef PRISM2_DOWNLOAD_SUPPORT
3447 #include "hostap_download.c"
3448 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3449
3450 #ifdef PRISM2_CALLBACK
3451 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3452 * This can use platform specific code and must define prism2_callback()
3453 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3454 * used. */
3455 #include "hostap_callback.c"
3456 #endif /* PRISM2_CALLBACK */
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