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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / intersil / hostap / hostap_hw.c
blobad1aa65fee7f7c4515dba38291c0503a647a3152
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 <linux/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/seq_file.h>
42 #include <linux/if_arp.h>
43 #include <linux/delay.h>
44 #include <linux/random.h>
45 #include <linux/wait.h>
46 #include <linux/sched/signal.h>
47 #include <linux/rtnetlink.h>
48 #include <linux/wireless.h>
49 #include <net/iw_handler.h>
50 #include <net/lib80211.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 const struct file_operations prism2_download_aux_dump_proc_fops;
134 static u8 * prism2_read_pda(struct net_device *dev);
135 static int prism2_download(local_info_t *local,
136 struct prism2_download_param *param);
137 static void prism2_download_free_data(struct prism2_download_data *dl);
138 static int prism2_download_volatile(local_info_t *local,
139 struct prism2_download_data *param);
140 static int prism2_download_genesis(local_info_t *local,
141 struct prism2_download_data *param);
142 static int prism2_get_ram_size(local_info_t *local);
143 #endif /* PRISM2_DOWNLOAD_SUPPORT */
144
145
146
147
148 #ifndef final_version
149 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
150 * present */
151 #define HFA384X_MAGIC 0x8A32
152 #endif
153
154 static void hfa384x_read_regs(struct net_device *dev,
155 struct hfa384x_regs *regs)
156 {
157 regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
158 regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
159 regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
160 regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
161 regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
162 }
163
164
165 /**
166 * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
167 * @local: pointer to private Host AP driver data
168 * @entry: Prism2 command queue entry to be freed
169 * @del_req: request the entry to be removed
170 *
171 * Internal helper function for freeing Prism2 command queue entries.
172 * Caller must have acquired local->cmdlock before calling this function.
173 */
174 static inline void __hostap_cmd_queue_free(local_info_t *local,
175 struct hostap_cmd_queue *entry,
176 int del_req)
177 {
178 if (del_req) {
179 entry->del_req = 1;
180 if (!list_empty(&entry->list)) {
181 list_del_init(&entry->list);
182 local->cmd_queue_len--;
183 }
184 }
185
186 if (refcount_dec_and_test(&entry->usecnt) && entry->del_req)
187 kfree(entry);
188 }
189
190
191 /**
192 * hostap_cmd_queue_free - Free Prism2 command queue entry
193 * @local: pointer to private Host AP driver data
194 * @entry: Prism2 command queue entry to be freed
195 * @del_req: request the entry to be removed
196 *
197 * Free a Prism2 command queue entry.
198 */
199 static inline void hostap_cmd_queue_free(local_info_t *local,
200 struct hostap_cmd_queue *entry,
201 int del_req)
202 {
203 unsigned long flags;
204
205 spin_lock_irqsave(&local->cmdlock, flags);
206 __hostap_cmd_queue_free(local, entry, del_req);
207 spin_unlock_irqrestore(&local->cmdlock, flags);
208 }
209
210
211 /**
212 * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
213 * @local: pointer to private Host AP driver data
214 */
215 static void prism2_clear_cmd_queue(local_info_t *local)
216 {
217 struct list_head *ptr, *n;
218 unsigned long flags;
219 struct hostap_cmd_queue *entry;
220
221 spin_lock_irqsave(&local->cmdlock, flags);
222 list_for_each_safe(ptr, n, &local->cmd_queue) {
223 entry = list_entry(ptr, struct hostap_cmd_queue, list);
224 refcount_inc(&entry->usecnt);
225 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
226 "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
227 local->dev->name, entry->type, entry->cmd,
228 entry->param0);
229 __hostap_cmd_queue_free(local, entry, 1);
230 }
231 if (local->cmd_queue_len) {
232 /* This should not happen; print debug message and clear
233 * queue length. */
234 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
235 "flush\n", local->dev->name, local->cmd_queue_len);
236 local->cmd_queue_len = 0;
237 }
238 spin_unlock_irqrestore(&local->cmdlock, flags);
239 }
240
241
242 /**
243 * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
244 * @dev: pointer to net_device
245 * @entry: Prism2 command queue entry to be issued
246 */
247 static int hfa384x_cmd_issue(struct net_device *dev,
248 struct hostap_cmd_queue *entry)
249 {
250 struct hostap_interface *iface;
251 local_info_t *local;
252 int tries;
253 u16 reg;
254 unsigned long flags;
255
256 iface = netdev_priv(dev);
257 local = iface->local;
258
259 if (local->func->card_present && !local->func->card_present(local))
260 return -ENODEV;
261
262 if (entry->issued) {
263 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
264 dev->name, entry);
265 }
266
267 /* wait until busy bit is clear; this should always be clear since the
268 * commands are serialized */
269 tries = HFA384X_CMD_BUSY_TIMEOUT;
270 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
271 tries--;
272 udelay(1);
273 }
274 #ifndef final_version
275 if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
276 prism2_io_debug_error(dev, 1);
277 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
278 "for %d usec\n", dev->name,
279 HFA384X_CMD_BUSY_TIMEOUT - tries);
280 }
281 #endif
282 if (tries == 0) {
283 reg = HFA384X_INW(HFA384X_CMD_OFF);
284 prism2_io_debug_error(dev, 2);
285 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
286 "reg=0x%04x\n", dev->name, reg);
287 return -ETIMEDOUT;
288 }
289
290 /* write command */
291 spin_lock_irqsave(&local->cmdlock, flags);
292 HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
293 HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
294 HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
295 entry->issued = 1;
296 spin_unlock_irqrestore(&local->cmdlock, flags);
297
298 return 0;
299 }
300
301
302 /**
303 * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
304 * @dev: pointer to net_device
305 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
306 * @param0: value for Param0 register
307 * @param1: value for Param1 register (pointer; %NULL if not used)
308 * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
309 *
310 * Issue given command (possibly after waiting in command queue) and sleep
311 * until the command is completed (or timed out or interrupted). This can be
312 * called only from user process context.
313 */
314 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
315 u16 *param1, u16 *resp0)
316 {
317 struct hostap_interface *iface;
318 local_info_t *local;
319 int err, res, issue, issued = 0;
320 unsigned long flags;
321 struct hostap_cmd_queue *entry;
322 DECLARE_WAITQUEUE(wait, current);
323
324 iface = netdev_priv(dev);
325 local = iface->local;
326
327 if (in_interrupt()) {
328 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
329 "context\n", dev->name);
330 return -1;
331 }
332
333 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
334 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
335 dev->name);
336 return -1;
337 }
338
339 if (signal_pending(current))
340 return -EINTR;
341
342 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
343 if (entry == NULL)
344 return -ENOMEM;
345
346 refcount_set(&entry->usecnt, 1);
347 entry->type = CMD_SLEEP;
348 entry->cmd = cmd;
349 entry->param0 = param0;
350 if (param1)
351 entry->param1 = *param1;
352 init_waitqueue_head(&entry->compl);
353
354 /* prepare to wait for command completion event, but do not sleep yet
355 */
356 add_wait_queue(&entry->compl, &wait);
357 set_current_state(TASK_INTERRUPTIBLE);
358
359 spin_lock_irqsave(&local->cmdlock, flags);
360 issue = list_empty(&local->cmd_queue);
361 if (issue)
362 entry->issuing = 1;
363 list_add_tail(&entry->list, &local->cmd_queue);
364 local->cmd_queue_len++;
365 spin_unlock_irqrestore(&local->cmdlock, flags);
366
367 err = 0;
368 if (!issue)
369 goto wait_completion;
370
371 if (signal_pending(current))
372 err = -EINTR;
373
374 if (!err) {
375 if (hfa384x_cmd_issue(dev, entry))
376 err = -ETIMEDOUT;
377 else
378 issued = 1;
379 }
380
381 wait_completion:
382 if (!err && entry->type != CMD_COMPLETED) {
383 /* sleep until command is completed or timed out */
384 res = schedule_timeout(2 * HZ);
385 } else
386 res = -1;
387
388 if (!err && signal_pending(current))
389 err = -EINTR;
390
391 if (err && issued) {
392 /* the command was issued, so a CmdCompl event should occur
393 * soon; however, there's a pending signal and
394 * schedule_timeout() would be interrupted; wait a short period
395 * of time to avoid removing entry from the list before
396 * CmdCompl event */
397 udelay(300);
398 }
399
400 set_current_state(TASK_RUNNING);
401 remove_wait_queue(&entry->compl, &wait);
402
403 /* If entry->list is still in the list, it must be removed
404 * first and in this case prism2_cmd_ev() does not yet have
405 * local reference to it, and the data can be kfree()'d
406 * here. If the command completion event is still generated,
407 * it will be assigned to next (possibly) pending command, but
408 * the driver will reset the card anyway due to timeout
409 *
410 * If the entry is not in the list prism2_cmd_ev() has a local
411 * reference to it, but keeps cmdlock as long as the data is
412 * needed, so the data can be kfree()'d here. */
413
414 /* FIX: if the entry->list is in the list, it has not been completed
415 * yet, so removing it here is somewhat wrong.. this could cause
416 * references to freed memory and next list_del() causing NULL pointer
417 * dereference.. it would probably be better to leave the entry in the
418 * list and the list should be emptied during hw reset */
419
420 spin_lock_irqsave(&local->cmdlock, flags);
421 if (!list_empty(&entry->list)) {
422 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
423 "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
424 entry->type, res);
425 list_del_init(&entry->list);
426 local->cmd_queue_len--;
427 }
428 spin_unlock_irqrestore(&local->cmdlock, flags);
429
430 if (err) {
431 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
432 dev->name, err);
433 res = err;
434 goto done;
435 }
436
437 if (entry->type != CMD_COMPLETED) {
438 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
439 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
440 "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
441 "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
442 res, entry, entry->type, entry->cmd, entry->param0, reg,
443 HFA384X_INW(HFA384X_INTEN_OFF));
444 if (reg & HFA384X_EV_CMD) {
445 /* Command completion event is pending, but the
446 * interrupt was not delivered - probably an issue
447 * with pcmcia-cs configuration. */
448 printk(KERN_WARNING "%s: interrupt delivery does not "
449 "seem to work\n", dev->name);
450 }
451 prism2_io_debug_error(dev, 3);
452 res = -ETIMEDOUT;
453 goto done;
454 }
455
456 if (resp0 != NULL)
457 *resp0 = entry->resp0;
458 #ifndef final_version
459 if (entry->res) {
460 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
461 "resp0=0x%04x\n",
462 dev->name, cmd, entry->res, entry->resp0);
463 }
464 #endif /* final_version */
465
466 res = entry->res;
467 done:
468 hostap_cmd_queue_free(local, entry, 1);
469 return res;
470 }
471
472
473 /**
474 * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
475 * @dev: pointer to net_device
476 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
477 * @param0: value for Param0 register
478 * @callback: command completion callback function (%NULL = no callback)
479 * @context: context data to be given to the callback function
480 *
481 * Issue given command (possibly after waiting in command queue) and use
482 * callback function to indicate command completion. This can be called both
483 * from user and interrupt context. The callback function will be called in
484 * hardware IRQ context. It can be %NULL, when no function is called when
485 * command is completed.
486 */
487 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
488 void (*callback)(struct net_device *dev,
489 long context, u16 resp0,
490 u16 status),
491 long context)
492 {
493 struct hostap_interface *iface;
494 local_info_t *local;
495 int issue, ret;
496 unsigned long flags;
497 struct hostap_cmd_queue *entry;
498
499 iface = netdev_priv(dev);
500 local = iface->local;
501
502 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
503 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
504 dev->name);
505 return -1;
506 }
507
508 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
509 if (entry == NULL)
510 return -ENOMEM;
511
512 refcount_set(&entry->usecnt, 1);
513 entry->type = CMD_CALLBACK;
514 entry->cmd = cmd;
515 entry->param0 = param0;
516 entry->callback = callback;
517 entry->context = context;
518
519 spin_lock_irqsave(&local->cmdlock, flags);
520 issue = list_empty(&local->cmd_queue);
521 if (issue)
522 entry->issuing = 1;
523 list_add_tail(&entry->list, &local->cmd_queue);
524 local->cmd_queue_len++;
525 spin_unlock_irqrestore(&local->cmdlock, flags);
526
527 if (issue && hfa384x_cmd_issue(dev, entry))
528 ret = -ETIMEDOUT;
529 else
530 ret = 0;
531
532 hostap_cmd_queue_free(local, entry, ret);
533
534 return ret;
535 }
536
537
538 /**
539 * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
540 * @dev: pointer to net_device
541 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
542 * @param0: value for Param0 register
543 * @io_debug_num: I/O debug error number
544 *
545 * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
546 */
547 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
548 int io_debug_num)
549 {
550 int tries;
551 u16 reg;
552
553 /* wait until busy bit is clear; this should always be clear since the
554 * commands are serialized */
555 tries = HFA384X_CMD_BUSY_TIMEOUT;
556 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
557 tries--;
558 udelay(1);
559 }
560 if (tries == 0) {
561 reg = HFA384X_INW(HFA384X_CMD_OFF);
562 prism2_io_debug_error(dev, io_debug_num);
563 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
564 "reg=0x%04x\n", dev->name, io_debug_num, reg);
565 return -ETIMEDOUT;
566 }
567
568 /* write command */
569 HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
570 HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
571
572 return 0;
573 }
574
575
576 /**
577 * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
578 * @dev: pointer to net_device
579 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
580 * @param0: value for Param0 register
581 */
582 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
583 {
584 int res, tries;
585 u16 reg;
586
587 res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
588 if (res)
589 return res;
590
591 /* wait for command completion */
592 if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
593 tries = HFA384X_DL_COMPL_TIMEOUT;
594 else
595 tries = HFA384X_CMD_COMPL_TIMEOUT;
596
597 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
598 tries > 0) {
599 tries--;
600 udelay(10);
601 }
602 if (tries == 0) {
603 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
604 prism2_io_debug_error(dev, 5);
605 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
606 "reg=0x%04x\n", dev->name, reg);
607 return -ETIMEDOUT;
608 }
609
610 res = (HFA384X_INW(HFA384X_STATUS_OFF) &
611 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
612 BIT(8))) >> 8;
613 #ifndef final_version
614 if (res) {
615 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
616 dev->name, cmd, res);
617 }
618 #endif
619
620 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
621
622 return res;
623 }
624
625
626 /**
627 * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
628 * @dev: pointer to net_device
629 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
630 * @param0: value for Param0 register
631 */
632 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
633 u16 param0)
634 {
635 return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
636 }
637
638
639 /**
640 * prism2_cmd_ev - Prism2 command completion event handler
641 * @dev: pointer to net_device
642 *
643 * Interrupt handler for command completion events. Called by the main
644 * interrupt handler in hardware IRQ context. Read Resp0 and status registers
645 * from the hardware and ACK the event. Depending on the issued command type
646 * either wake up the sleeping process that is waiting for command completion
647 * or call the callback function. Issue the next command, if one is pending.
648 */
649 static void prism2_cmd_ev(struct net_device *dev)
650 {
651 struct hostap_interface *iface;
652 local_info_t *local;
653 struct hostap_cmd_queue *entry = NULL;
654
655 iface = netdev_priv(dev);
656 local = iface->local;
657
658 spin_lock(&local->cmdlock);
659 if (!list_empty(&local->cmd_queue)) {
660 entry = list_entry(local->cmd_queue.next,
661 struct hostap_cmd_queue, list);
662 refcount_inc(&entry->usecnt);
663 list_del_init(&entry->list);
664 local->cmd_queue_len--;
665
666 if (!entry->issued) {
667 printk(KERN_DEBUG "%s: Command completion event, but "
668 "cmd not issued\n", dev->name);
669 __hostap_cmd_queue_free(local, entry, 1);
670 entry = NULL;
671 }
672 }
673 spin_unlock(&local->cmdlock);
674
675 if (!entry) {
676 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
677 printk(KERN_DEBUG "%s: Command completion event, but no "
678 "pending commands\n", dev->name);
679 return;
680 }
681
682 entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
683 entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
684 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
685 BIT(9) | BIT(8))) >> 8;
686 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
687
688 /* TODO: rest of the CmdEv handling could be moved to tasklet */
689 if (entry->type == CMD_SLEEP) {
690 entry->type = CMD_COMPLETED;
691 wake_up_interruptible(&entry->compl);
692 } else if (entry->type == CMD_CALLBACK) {
693 if (entry->callback)
694 entry->callback(dev, entry->context, entry->resp0,
695 entry->res);
696 } else {
697 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
698 dev->name, entry->type);
699 }
700 hostap_cmd_queue_free(local, entry, 1);
701
702 /* issue next command, if pending */
703 entry = NULL;
704 spin_lock(&local->cmdlock);
705 if (!list_empty(&local->cmd_queue)) {
706 entry = list_entry(local->cmd_queue.next,
707 struct hostap_cmd_queue, list);
708 if (entry->issuing) {
709 /* hfa384x_cmd() has already started issuing this
710 * command, so do not start here */
711 entry = NULL;
712 }
713 if (entry)
714 refcount_inc(&entry->usecnt);
715 }
716 spin_unlock(&local->cmdlock);
717
718 if (entry) {
719 /* issue next command; if command issuing fails, remove the
720 * entry from cmd_queue */
721 int res = hfa384x_cmd_issue(dev, entry);
722 spin_lock(&local->cmdlock);
723 __hostap_cmd_queue_free(local, entry, res);
724 spin_unlock(&local->cmdlock);
725 }
726 }
727
728
729 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
730 {
731 int tries = HFA384X_BAP_BUSY_TIMEOUT;
732 int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
733
734 while (res && tries > 0) {
735 tries--;
736 udelay(1);
737 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
738 }
739 return res;
740 }
741
742
743 /* Offset must be even */
744 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
745 int offset)
746 {
747 u16 o_off, s_off;
748 int ret = 0;
749
750 if (offset % 2 || bap > 1)
751 return -EINVAL;
752
753 if (bap == BAP1) {
754 o_off = HFA384X_OFFSET1_OFF;
755 s_off = HFA384X_SELECT1_OFF;
756 } else {
757 o_off = HFA384X_OFFSET0_OFF;
758 s_off = HFA384X_SELECT0_OFF;
759 }
760
761 if (hfa384x_wait_offset(dev, o_off)) {
762 prism2_io_debug_error(dev, 7);
763 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
764 dev->name);
765 ret = -ETIMEDOUT;
766 goto out;
767 }
768
769 HFA384X_OUTW(id, s_off);
770 HFA384X_OUTW(offset, o_off);
771
772 if (hfa384x_wait_offset(dev, o_off)) {
773 prism2_io_debug_error(dev, 8);
774 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
775 dev->name);
776 ret = -ETIMEDOUT;
777 goto out;
778 }
779 #ifndef final_version
780 if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
781 prism2_io_debug_error(dev, 9);
782 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
783 "(%d,0x04%x,%d); reg=0x%04x\n",
784 dev->name, bap, id, offset, HFA384X_INW(o_off));
785 ret = -EINVAL;
786 }
787 #endif
788
789 out:
790 return ret;
791 }
792
793
794 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
795 int exact_len)
796 {
797 struct hostap_interface *iface;
798 local_info_t *local;
799 int res, rlen = 0;
800 struct hfa384x_rid_hdr rec;
801
802 iface = netdev_priv(dev);
803 local = iface->local;
804
805 if (local->no_pri) {
806 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
807 "f/w\n", dev->name, rid, len);
808 return -ENOTTY; /* Well.. not really correct, but return
809 * something unique enough.. */
810 }
811
812 if ((local->func->card_present && !local->func->card_present(local)) ||
813 local->hw_downloading)
814 return -ENODEV;
815
816 res = mutex_lock_interruptible(&local->rid_bap_mtx);
817 if (res)
818 return res;
819
820 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
821 if (res) {
822 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
823 "(res=%d, rid=%04x, len=%d)\n",
824 dev->name, res, rid, len);
825 mutex_unlock(&local->rid_bap_mtx);
826 return res;
827 }
828
829 spin_lock_bh(&local->baplock);
830
831 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
832 if (res)
833 goto unlock;
834
835 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
836 if (res)
837 goto unlock;
838
839 if (le16_to_cpu(rec.len) == 0) {
840 /* RID not available */
841 res = -ENODATA;
842 goto unlock;
843 }
844
845 rlen = (le16_to_cpu(rec.len) - 1) * 2;
846 if (exact_len && rlen != len) {
847 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
848 "rid=0x%04x, len=%d (expected %d)\n",
849 dev->name, rid, rlen, len);
850 res = -ENODATA;
851 }
852
853 res = hfa384x_from_bap(dev, BAP0, buf, len);
854
855 unlock:
856 spin_unlock_bh(&local->baplock);
857 mutex_unlock(&local->rid_bap_mtx);
858
859 if (res) {
860 if (res != -ENODATA)
861 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
862 "len=%d) - failed - res=%d\n", dev->name, rid,
863 len, res);
864 if (res == -ETIMEDOUT)
865 prism2_hw_reset(dev);
866 return res;
867 }
868
869 return rlen;
870 }
871
872
873 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
874 {
875 struct hostap_interface *iface;
876 local_info_t *local;
877 struct hfa384x_rid_hdr rec;
878 int res;
879
880 iface = netdev_priv(dev);
881 local = iface->local;
882
883 if (local->no_pri) {
884 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
885 "f/w\n", dev->name, rid, len);
886 return -ENOTTY; /* Well.. not really correct, but return
887 * something unique enough.. */
888 }
889
890 if ((local->func->card_present && !local->func->card_present(local)) ||
891 local->hw_downloading)
892 return -ENODEV;
893
894 rec.rid = cpu_to_le16(rid);
895 /* RID len in words and +1 for rec.rid */
896 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
897
898 res = mutex_lock_interruptible(&local->rid_bap_mtx);
899 if (res)
900 return res;
901
902 spin_lock_bh(&local->baplock);
903 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
904 if (!res)
905 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
906 if (!res)
907 res = hfa384x_to_bap(dev, BAP0, buf, len);
908 spin_unlock_bh(&local->baplock);
909
910 if (res) {
911 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
912 "failed - res=%d\n", dev->name, rid, len, res);
913 mutex_unlock(&local->rid_bap_mtx);
914 return res;
915 }
916
917 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
918 mutex_unlock(&local->rid_bap_mtx);
919
920 if (res) {
921 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
922 "failed (res=%d, rid=%04x, len=%d)\n",
923 dev->name, res, rid, len);
924
925 if (res == -ETIMEDOUT)
926 prism2_hw_reset(dev);
927 }
928
929 return res;
930 }
931
932
933 static void hfa384x_disable_interrupts(struct net_device *dev)
934 {
935 /* disable interrupts and clear event status */
936 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
937 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
938 }
939
940
941 static void hfa384x_enable_interrupts(struct net_device *dev)
942 {
943 /* ack pending events and enable interrupts from selected events */
944 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
945 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
946 }
947
948
949 static void hfa384x_events_no_bap0(struct net_device *dev)
950 {
951 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
952 HFA384X_INTEN_OFF);
953 }
954
955
956 static void hfa384x_events_all(struct net_device *dev)
957 {
958 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
959 }
960
961
962 static void hfa384x_events_only_cmd(struct net_device *dev)
963 {
964 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
965 }
966
967
968 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
969 {
970 u16 fid;
971 unsigned long delay;
972
973 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
974 * below would be handled like CmdCompl event (sleep here, wake up from
975 * interrupt handler */
976 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
977 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
978 dev->name, len);
979 return 0xffff;
980 }
981
982 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
983 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
984 time_before(jiffies, delay))
985 yield();
986 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
987 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
988 return 0xffff;
989 }
990
991 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
992 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
993
994 return fid;
995 }
996
997
998 static int prism2_reset_port(struct net_device *dev)
999 {
1000 struct hostap_interface *iface;
1001 local_info_t *local;
1002 int res;
1003
1004 iface = netdev_priv(dev);
1005 local = iface->local;
1006
1007 if (!local->dev_enabled)
1008 return 0;
1009
1010 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1011 NULL, NULL);
1012 if (res)
1013 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1014 dev->name);
1015 else {
1016 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1017 NULL, NULL);
1018 if (res)
1019 printk(KERN_DEBUG "%s: reset port failed to enable "
1020 "port\n", dev->name);
1021 }
1022
1023 /* It looks like at least some STA firmware versions reset
1024 * fragmentation threshold back to 2346 after enable command. Restore
1025 * the configured value, if it differs from this default. */
1026 if (local->fragm_threshold != 2346 &&
1027 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1028 local->fragm_threshold)) {
1029 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1030 "threshold (%d) after Port0 enable\n",
1031 dev->name, local->fragm_threshold);
1032 }
1033
1034 /* Some firmwares lose antenna selection settings on reset */
1035 (void) hostap_set_antsel(local);
1036
1037 return res;
1038 }
1039
1040
1041 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1042 const char *txt)
1043 {
1044 struct hfa384x_comp_ident comp;
1045 struct hostap_interface *iface;
1046 local_info_t *local;
1047
1048 iface = netdev_priv(dev);
1049 local = iface->local;
1050
1051 if (local->no_pri) {
1052 /* PRI f/w not yet available - cannot read RIDs */
1053 return -1;
1054 }
1055 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1056 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1057 return -1;
1058 }
1059
1060 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1061 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1062 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1063 return 0;
1064 }
1065
1066
1067 static int prism2_setup_rids(struct net_device *dev)
1068 {
1069 struct hostap_interface *iface;
1070 local_info_t *local;
1071 __le16 tmp;
1072 int ret = 0;
1073
1074 iface = netdev_priv(dev);
1075 local = iface->local;
1076
1077 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1078
1079 if (!local->fw_ap) {
1080 u16 tmp1 = hostap_get_porttype(local);
1081 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1082 if (ret) {
1083 printk("%s: Port type setting to %d failed\n",
1084 dev->name, tmp1);
1085 goto fail;
1086 }
1087 }
1088
1089 /* Setting SSID to empty string seems to kill the card in Host AP mode
1090 */
1091 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1092 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1093 local->essid);
1094 if (ret) {
1095 printk("%s: AP own SSID setting failed\n", dev->name);
1096 goto fail;
1097 }
1098 }
1099
1100 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1101 PRISM2_DATA_MAXLEN);
1102 if (ret) {
1103 printk("%s: MAC data length setting to %d failed\n",
1104 dev->name, PRISM2_DATA_MAXLEN);
1105 goto fail;
1106 }
1107
1108 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1109 printk("%s: Channel list read failed\n", dev->name);
1110 ret = -EINVAL;
1111 goto fail;
1112 }
1113 local->channel_mask = le16_to_cpu(tmp);
1114
1115 if (local->channel < 1 || local->channel > 14 ||
1116 !(local->channel_mask & (1 << (local->channel - 1)))) {
1117 printk(KERN_WARNING "%s: Channel setting out of range "
1118 "(%d)!\n", dev->name, local->channel);
1119 ret = -EBUSY;
1120 goto fail;
1121 }
1122
1123 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1124 if (ret) {
1125 printk("%s: Channel setting to %d failed\n",
1126 dev->name, local->channel);
1127 goto fail;
1128 }
1129
1130 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1131 local->beacon_int);
1132 if (ret) {
1133 printk("%s: Beacon interval setting to %d failed\n",
1134 dev->name, local->beacon_int);
1135 /* this may fail with Symbol/Lucent firmware */
1136 if (ret == -ETIMEDOUT)
1137 goto fail;
1138 }
1139
1140 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1141 local->dtim_period);
1142 if (ret) {
1143 printk("%s: DTIM period setting to %d failed\n",
1144 dev->name, local->dtim_period);
1145 /* this may fail with Symbol/Lucent firmware */
1146 if (ret == -ETIMEDOUT)
1147 goto fail;
1148 }
1149
1150 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1151 local->is_promisc);
1152 if (ret)
1153 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1154 dev->name, local->is_promisc);
1155
1156 if (!local->fw_ap) {
1157 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1158 local->essid);
1159 if (ret) {
1160 printk("%s: Desired SSID setting failed\n", dev->name);
1161 goto fail;
1162 }
1163 }
1164
1165 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1166 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1167 * rates */
1168 if (local->tx_rate_control == 0) {
1169 local->tx_rate_control =
1170 HFA384X_RATES_1MBPS |
1171 HFA384X_RATES_2MBPS |
1172 HFA384X_RATES_5MBPS |
1173 HFA384X_RATES_11MBPS;
1174 }
1175 if (local->basic_rates == 0)
1176 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1177
1178 if (!local->fw_ap) {
1179 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1180 local->tx_rate_control);
1181 if (ret) {
1182 printk("%s: TXRateControl setting to %d failed\n",
1183 dev->name, local->tx_rate_control);
1184 goto fail;
1185 }
1186
1187 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1188 local->tx_rate_control);
1189 if (ret) {
1190 printk("%s: cnfSupportedRates setting to %d failed\n",
1191 dev->name, local->tx_rate_control);
1192 }
1193
1194 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1195 local->basic_rates);
1196 if (ret) {
1197 printk("%s: cnfBasicRates setting to %d failed\n",
1198 dev->name, local->basic_rates);
1199 }
1200
1201 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1202 if (ret) {
1203 printk("%s: Create IBSS setting to 1 failed\n",
1204 dev->name);
1205 }
1206 }
1207
1208 if (local->name_set)
1209 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1210 local->name);
1211
1212 if (hostap_set_encryption(local)) {
1213 printk(KERN_INFO "%s: could not configure encryption\n",
1214 dev->name);
1215 }
1216
1217 (void) hostap_set_antsel(local);
1218
1219 if (hostap_set_roaming(local)) {
1220 printk(KERN_INFO "%s: could not set host roaming\n",
1221 dev->name);
1222 }
1223
1224 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1225 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1226 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1227 dev->name, local->enh_sec);
1228
1229 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1230 * not working correctly (last seven counters report bogus values).
1231 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1232 * beginning with that firmware version. Another bug fix for 32-bit
1233 * tallies in 1.4.0; should 16-bit tallies be used for some other
1234 * versions, too? */
1235 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1236 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1237 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1238 "failed\n", dev->name);
1239 local->tallies32 = 0;
1240 } else
1241 local->tallies32 = 1;
1242 } else
1243 local->tallies32 = 0;
1244
1245 hostap_set_auth_algs(local);
1246
1247 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1248 local->fragm_threshold)) {
1249 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1250 "failed\n", dev->name, local->fragm_threshold);
1251 }
1252
1253 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1254 local->rts_threshold)) {
1255 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1256 dev->name, local->rts_threshold);
1257 }
1258
1259 if (local->manual_retry_count >= 0 &&
1260 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1261 local->manual_retry_count)) {
1262 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1263 dev->name, local->manual_retry_count);
1264 }
1265
1266 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1267 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1268 local->rssi_to_dBm = le16_to_cpu(tmp);
1269 }
1270
1271 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1272 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1273 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1274 dev->name);
1275 }
1276
1277 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1278 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1279 local->generic_elem, local->generic_elem_len)) {
1280 printk(KERN_INFO "%s: setting genericElement failed\n",
1281 dev->name);
1282 }
1283
1284 fail:
1285 return ret;
1286 }
1287
1288
1289 static int prism2_hw_init(struct net_device *dev, int initial)
1290 {
1291 struct hostap_interface *iface;
1292 local_info_t *local;
1293 int ret, first = 1;
1294 unsigned long start, delay;
1295
1296 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1297
1298 iface = netdev_priv(dev);
1299 local = iface->local;
1300
1301 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1302
1303 init:
1304 /* initialize HFA 384x */
1305 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1306 if (ret) {
1307 printk(KERN_INFO "%s: first command failed - assuming card "
1308 "does not have primary firmware\n", dev_info);
1309 }
1310
1311 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1312 /* EvStat has Cmd bit set in some cases, so retry once if no
1313 * wait was needed */
1314 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1315 printk(KERN_DEBUG "%s: init command completed too quickly - "
1316 "retrying\n", dev->name);
1317 first = 0;
1318 goto init;
1319 }
1320
1321 start = jiffies;
1322 delay = jiffies + HFA384X_INIT_TIMEOUT;
1323 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1324 time_before(jiffies, delay))
1325 yield();
1326 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1327 printk(KERN_DEBUG "%s: assuming no Primary image in "
1328 "flash - card initialization not completed\n",
1329 dev_info);
1330 local->no_pri = 1;
1331 #ifdef PRISM2_DOWNLOAD_SUPPORT
1332 if (local->sram_type == -1)
1333 local->sram_type = prism2_get_ram_size(local);
1334 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1335 return 1;
1336 }
1337 local->no_pri = 0;
1338 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1339 (jiffies - start) * 1000 / HZ);
1340 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1341 return 0;
1342 }
1343
1344
1345 static int prism2_hw_init2(struct net_device *dev, int initial)
1346 {
1347 struct hostap_interface *iface;
1348 local_info_t *local;
1349 int i;
1350
1351 iface = netdev_priv(dev);
1352 local = iface->local;
1353
1354 #ifdef PRISM2_DOWNLOAD_SUPPORT
1355 kfree(local->pda);
1356 if (local->no_pri)
1357 local->pda = NULL;
1358 else
1359 local->pda = prism2_read_pda(dev);
1360 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1361
1362 hfa384x_disable_interrupts(dev);
1363
1364 #ifndef final_version
1365 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1366 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1367 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1368 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1369 goto failed;
1370 }
1371 #endif
1372
1373 if (initial || local->pri_only) {
1374 hfa384x_events_only_cmd(dev);
1375 /* get card version information */
1376 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1377 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1378 hfa384x_disable_interrupts(dev);
1379 goto failed;
1380 }
1381
1382 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1383 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1384 "- only Primary f/w present\n", dev->name);
1385 local->pri_only = 1;
1386 return 0;
1387 }
1388 local->pri_only = 0;
1389 hfa384x_disable_interrupts(dev);
1390 }
1391
1392 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1393 * enable interrupts before this. This would also require some sort of
1394 * sleeping AllocEv waiting */
1395
1396 /* allocate TX FIDs */
1397 local->txfid_len = PRISM2_TXFID_LEN;
1398 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1399 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1400 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1401 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1402 if (local->txfid[i] != 0xffff) {
1403 printk(KERN_DEBUG "%s: Using shorter TX FID "
1404 "(1600 bytes)\n", dev->name);
1405 local->txfid_len = 1600;
1406 }
1407 }
1408 if (local->txfid[i] == 0xffff)
1409 goto failed;
1410 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1411 }
1412
1413 hfa384x_events_only_cmd(dev);
1414
1415 if (initial) {
1416 struct list_head *ptr;
1417 prism2_check_sta_fw_version(local);
1418
1419 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1420 dev->dev_addr, 6, 1) < 0) {
1421 printk("%s: could not get own MAC address\n",
1422 dev->name);
1423 }
1424 list_for_each(ptr, &local->hostap_interfaces) {
1425 iface = list_entry(ptr, struct hostap_interface, list);
1426 eth_hw_addr_inherit(iface->dev, dev);
1427 }
1428 } else if (local->fw_ap)
1429 prism2_check_sta_fw_version(local);
1430
1431 prism2_setup_rids(dev);
1432
1433 /* MAC is now configured, but port 0 is not yet enabled */
1434 return 0;
1435
1436 failed:
1437 if (!local->no_pri)
1438 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1439 return 1;
1440 }
1441
1442
1443 static int prism2_hw_enable(struct net_device *dev, int initial)
1444 {
1445 struct hostap_interface *iface;
1446 local_info_t *local;
1447 int was_resetting;
1448
1449 iface = netdev_priv(dev);
1450 local = iface->local;
1451 was_resetting = local->hw_resetting;
1452
1453 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1454 printk("%s: MAC port 0 enabling failed\n", dev->name);
1455 return 1;
1456 }
1457
1458 local->hw_ready = 1;
1459 local->hw_reset_tries = 0;
1460 local->hw_resetting = 0;
1461 hfa384x_enable_interrupts(dev);
1462
1463 /* at least D-Link DWL-650 seems to require additional port reset
1464 * before it starts acting as an AP, so reset port automatically
1465 * here just in case */
1466 if (initial && prism2_reset_port(dev)) {
1467 printk("%s: MAC port 0 resetting failed\n", dev->name);
1468 return 1;
1469 }
1470
1471 if (was_resetting && netif_queue_stopped(dev)) {
1472 /* If hw_reset() was called during pending transmit, netif
1473 * queue was stopped. Wake it up now since the wlan card has
1474 * been resetted. */
1475 netif_wake_queue(dev);
1476 }
1477
1478 return 0;
1479 }
1480
1481
1482 static int prism2_hw_config(struct net_device *dev, int initial)
1483 {
1484 struct hostap_interface *iface;
1485 local_info_t *local;
1486
1487 iface = netdev_priv(dev);
1488 local = iface->local;
1489
1490 if (local->hw_downloading)
1491 return 1;
1492
1493 if (prism2_hw_init(dev, initial)) {
1494 return local->no_pri ? 0 : 1;
1495 }
1496
1497 if (prism2_hw_init2(dev, initial))
1498 return 1;
1499
1500 /* Enable firmware if secondary image is loaded and at least one of the
1501 * netdevices is up. */
1502 if (!local->pri_only &&
1503 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1504 if (!local->dev_enabled)
1505 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1506 local->dev_enabled = 1;
1507 return prism2_hw_enable(dev, initial);
1508 }
1509
1510 return 0;
1511 }
1512
1513
1514 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1515 {
1516 struct hostap_interface *iface;
1517 local_info_t *local;
1518
1519 iface = netdev_priv(dev);
1520 local = iface->local;
1521
1522 /* Allow only command completion events during disable */
1523 hfa384x_events_only_cmd(dev);
1524
1525 local->hw_ready = 0;
1526 if (local->dev_enabled)
1527 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1528 local->dev_enabled = 0;
1529
1530 if (local->func->card_present && !local->func->card_present(local)) {
1531 printk(KERN_DEBUG "%s: card already removed or not configured "
1532 "during shutdown\n", dev->name);
1533 return;
1534 }
1535
1536 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1537 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1538 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1539
1540 hfa384x_disable_interrupts(dev);
1541
1542 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1543 hfa384x_events_only_cmd(dev);
1544 else
1545 prism2_clear_cmd_queue(local);
1546 }
1547
1548
1549 static void prism2_hw_reset(struct net_device *dev)
1550 {
1551 struct hostap_interface *iface;
1552 local_info_t *local;
1553
1554 #if 0
1555 static long last_reset = 0;
1556
1557 /* do not reset card more than once per second to avoid ending up in a
1558 * busy loop resetting the card */
1559 if (time_before_eq(jiffies, last_reset + HZ))
1560 return;
1561 last_reset = jiffies;
1562 #endif
1563
1564 iface = netdev_priv(dev);
1565 local = iface->local;
1566
1567 if (in_interrupt()) {
1568 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1569 "in interrupt context\n", dev->name);
1570 return;
1571 }
1572
1573 if (local->hw_downloading)
1574 return;
1575
1576 if (local->hw_resetting) {
1577 printk(KERN_WARNING "%s: %s: already resetting card - "
1578 "ignoring reset request\n", dev_info, dev->name);
1579 return;
1580 }
1581
1582 local->hw_reset_tries++;
1583 if (local->hw_reset_tries > 10) {
1584 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1585 dev->name);
1586 return;
1587 }
1588
1589 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1590 hfa384x_disable_interrupts(dev);
1591 local->hw_resetting = 1;
1592 if (local->func->cor_sreset) {
1593 /* Host system seems to hang in some cases with high traffic
1594 * load or shared interrupts during COR sreset. Disable shared
1595 * interrupts during reset to avoid these crashes. COS sreset
1596 * takes quite a long time, so it is unfortunate that this
1597 * seems to be needed. Anyway, I do not know of any better way
1598 * of avoiding the crash. */
1599 disable_irq(dev->irq);
1600 local->func->cor_sreset(local);
1601 enable_irq(dev->irq);
1602 }
1603 prism2_hw_shutdown(dev, 1);
1604 prism2_hw_config(dev, 0);
1605 local->hw_resetting = 0;
1606
1607 #ifdef PRISM2_DOWNLOAD_SUPPORT
1608 if (local->dl_pri) {
1609 printk(KERN_DEBUG "%s: persistent download of primary "
1610 "firmware\n", dev->name);
1611 if (prism2_download_genesis(local, local->dl_pri) < 0)
1612 printk(KERN_WARNING "%s: download (PRI) failed\n",
1613 dev->name);
1614 }
1615
1616 if (local->dl_sec) {
1617 printk(KERN_DEBUG "%s: persistent download of secondary "
1618 "firmware\n", dev->name);
1619 if (prism2_download_volatile(local, local->dl_sec) < 0)
1620 printk(KERN_WARNING "%s: download (SEC) failed\n",
1621 dev->name);
1622 }
1623 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1624
1625 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1626 }
1627
1628
1629 static void prism2_schedule_reset(local_info_t *local)
1630 {
1631 schedule_work(&local->reset_queue);
1632 }
1633
1634
1635 /* Called only as scheduled task after noticing card timeout in interrupt
1636 * context */
1637 static void handle_reset_queue(struct work_struct *work)
1638 {
1639 local_info_t *local = container_of(work, local_info_t, reset_queue);
1640
1641 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1642 prism2_hw_reset(local->dev);
1643
1644 if (netif_queue_stopped(local->dev)) {
1645 int i;
1646
1647 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1648 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1649 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1650 "wake up queue\n");
1651 netif_wake_queue(local->dev);
1652 break;
1653 }
1654 }
1655 }
1656
1657
1658 static int prism2_get_txfid_idx(local_info_t *local)
1659 {
1660 int idx, end;
1661 unsigned long flags;
1662
1663 spin_lock_irqsave(&local->txfidlock, flags);
1664 end = idx = local->next_txfid;
1665 do {
1666 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1667 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1668 spin_unlock_irqrestore(&local->txfidlock, flags);
1669 return idx;
1670 }
1671 idx++;
1672 if (idx >= PRISM2_TXFID_COUNT)
1673 idx = 0;
1674 } while (idx != end);
1675 spin_unlock_irqrestore(&local->txfidlock, flags);
1676
1677 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1678 "packet dropped\n");
1679 local->dev->stats.tx_dropped++;
1680
1681 return -1;
1682 }
1683
1684
1685 /* Called only from hardware IRQ */
1686 static void prism2_transmit_cb(struct net_device *dev, long context,
1687 u16 resp0, u16 res)
1688 {
1689 struct hostap_interface *iface;
1690 local_info_t *local;
1691 int idx = (int) context;
1692
1693 iface = netdev_priv(dev);
1694 local = iface->local;
1695
1696 if (res) {
1697 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1698 dev->name, res);
1699 return;
1700 }
1701
1702 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1703 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1704 "idx=%d\n", dev->name, idx);
1705 return;
1706 }
1707
1708 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1709 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1710 "with no pending transmit\n", dev->name);
1711 }
1712
1713 if (netif_queue_stopped(dev)) {
1714 /* ready for next TX, so wake up queue that was stopped in
1715 * prism2_transmit() */
1716 netif_wake_queue(dev);
1717 }
1718
1719 spin_lock(&local->txfidlock);
1720
1721 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1722 * will be automatically allocated for the next TX frame */
1723 local->intransmitfid[idx] = resp0;
1724
1725 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1726 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1727 dev->name, idx, local->txfid[idx],
1728 resp0, local->intransmitfid[local->next_txfid]);
1729
1730 idx++;
1731 if (idx >= PRISM2_TXFID_COUNT)
1732 idx = 0;
1733 local->next_txfid = idx;
1734
1735 /* check if all TX buffers are occupied */
1736 do {
1737 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1738 spin_unlock(&local->txfidlock);
1739 return;
1740 }
1741 idx++;
1742 if (idx >= PRISM2_TXFID_COUNT)
1743 idx = 0;
1744 } while (idx != local->next_txfid);
1745 spin_unlock(&local->txfidlock);
1746
1747 /* no empty TX buffers, stop queue */
1748 netif_stop_queue(dev);
1749 }
1750
1751
1752 /* Called only from software IRQ if PCI bus master is not used (with bus master
1753 * this can be called both from software and hardware IRQ) */
1754 static int prism2_transmit(struct net_device *dev, int idx)
1755 {
1756 struct hostap_interface *iface;
1757 local_info_t *local;
1758 int res;
1759
1760 iface = netdev_priv(dev);
1761 local = iface->local;
1762
1763 /* The driver tries to stop netif queue so that there would not be
1764 * more than one attempt to transmit frames going on; check that this
1765 * is really the case */
1766
1767 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1768 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1769 "when previous TX was pending\n", dev->name);
1770 return -1;
1771 }
1772
1773 /* stop the queue for the time that transmit is pending */
1774 netif_stop_queue(dev);
1775
1776 /* transmit packet */
1777 res = hfa384x_cmd_callback(
1778 dev,
1779 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1780 local->txfid[idx],
1781 prism2_transmit_cb, (long) idx);
1782
1783 if (res) {
1784 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1785 "failed (res=%d)\n", dev->name, res);
1786 dev->stats.tx_dropped++;
1787 netif_wake_queue(dev);
1788 return -1;
1789 }
1790 netif_trans_update(dev);
1791
1792 /* Since we did not wait for command completion, the card continues
1793 * to process on the background and we will finish handling when
1794 * command completion event is handled (prism2_cmd_ev() function) */
1795
1796 return 0;
1797 }
1798
1799
1800 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1801 * send the payload with this descriptor) */
1802 /* Called only from software IRQ */
1803 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1804 {
1805 struct hostap_interface *iface;
1806 local_info_t *local;
1807 struct hfa384x_tx_frame txdesc;
1808 struct hostap_skb_tx_data *meta;
1809 int hdr_len, data_len, idx, res, ret = -1;
1810 u16 tx_control, fc;
1811
1812 iface = netdev_priv(dev);
1813 local = iface->local;
1814
1815 meta = (struct hostap_skb_tx_data *) skb->cb;
1816
1817 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1818
1819 if ((local->func->card_present && !local->func->card_present(local)) ||
1820 !local->hw_ready || local->hw_downloading || local->pri_only) {
1821 if (net_ratelimit()) {
1822 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1823 " skipping\n", dev->name);
1824 }
1825 goto fail;
1826 }
1827
1828 memset(&txdesc, 0, sizeof(txdesc));
1829
1830 /* skb->data starts with txdesc->frame_control */
1831 hdr_len = 24;
1832 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1833 fc = le16_to_cpu(txdesc.frame_control);
1834 if (ieee80211_is_data(txdesc.frame_control) &&
1835 ieee80211_has_a4(txdesc.frame_control) &&
1836 skb->len >= 30) {
1837 /* Addr4 */
1838 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1839 ETH_ALEN);
1840 hdr_len += ETH_ALEN;
1841 }
1842
1843 tx_control = local->tx_control;
1844 if (meta->tx_cb_idx) {
1845 tx_control |= HFA384X_TX_CTRL_TX_OK;
1846 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1847 }
1848 txdesc.tx_control = cpu_to_le16(tx_control);
1849 txdesc.tx_rate = meta->rate;
1850
1851 data_len = skb->len - hdr_len;
1852 txdesc.data_len = cpu_to_le16(data_len);
1853 txdesc.len = cpu_to_be16(data_len);
1854
1855 idx = prism2_get_txfid_idx(local);
1856 if (idx < 0)
1857 goto fail;
1858
1859 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1860 hostap_dump_tx_header(dev->name, &txdesc);
1861
1862 spin_lock(&local->baplock);
1863 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1864
1865 if (!res)
1866 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1867 if (!res)
1868 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1869 skb->len - hdr_len);
1870 spin_unlock(&local->baplock);
1871
1872 if (!res)
1873 res = prism2_transmit(dev, idx);
1874 if (res) {
1875 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1876 dev->name);
1877 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1878 schedule_work(&local->reset_queue);
1879 goto fail;
1880 }
1881
1882 ret = 0;
1883
1884 fail:
1885 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1886 return ret;
1887 }
1888
1889
1890 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1891 * register has changed values between consecutive reads for an unknown reason.
1892 * This should really not happen, so more debugging is needed. This test
1893 * version is a bit slower, but it will detect most of such register changes
1894 * and will try to get the correct fid eventually. */
1895 #define EXTRA_FID_READ_TESTS
1896
1897 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1898 {
1899 #ifdef EXTRA_FID_READ_TESTS
1900 u16 val, val2, val3;
1901 int i;
1902
1903 for (i = 0; i < 10; i++) {
1904 val = HFA384X_INW(reg);
1905 val2 = HFA384X_INW(reg);
1906 val3 = HFA384X_INW(reg);
1907
1908 if (val == val2 && val == val3)
1909 return val;
1910
1911 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1912 " %04x %04x %04x\n",
1913 dev->name, i, reg, val, val2, val3);
1914 if ((val == val2 || val == val3) && val != 0)
1915 return val;
1916 if (val2 == val3 && val2 != 0)
1917 return val2;
1918 }
1919 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1920 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1921 return val;
1922 #else /* EXTRA_FID_READ_TESTS */
1923 return HFA384X_INW(reg);
1924 #endif /* EXTRA_FID_READ_TESTS */
1925 }
1926
1927
1928 /* Called only as a tasklet (software IRQ) */
1929 static void prism2_rx(local_info_t *local)
1930 {
1931 struct net_device *dev = local->dev;
1932 int res, rx_pending = 0;
1933 u16 len, hdr_len, rxfid, status, macport;
1934 struct hfa384x_rx_frame rxdesc;
1935 struct sk_buff *skb = NULL;
1936
1937 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1938
1939 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1940 #ifndef final_version
1941 if (rxfid == 0) {
1942 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1943 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1944 rxfid);
1945 if (rxfid == 0) {
1946 schedule_work(&local->reset_queue);
1947 goto rx_dropped;
1948 }
1949 /* try to continue with the new rxfid value */
1950 }
1951 #endif
1952
1953 spin_lock(&local->baplock);
1954 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1955 if (!res)
1956 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1957
1958 if (res) {
1959 spin_unlock(&local->baplock);
1960 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1961 res);
1962 if (res == -ETIMEDOUT) {
1963 schedule_work(&local->reset_queue);
1964 }
1965 goto rx_dropped;
1966 }
1967
1968 len = le16_to_cpu(rxdesc.data_len);
1969 hdr_len = sizeof(rxdesc);
1970 status = le16_to_cpu(rxdesc.status);
1971 macport = (status >> 8) & 0x07;
1972
1973 /* Drop frames with too large reported payload length. Monitor mode
1974 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1975 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1976 * macport 7 */
1977 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1978 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1979 if (len >= (u16) -14) {
1980 hdr_len -= 65535 - len;
1981 hdr_len--;
1982 }
1983 len = 0;
1984 } else {
1985 spin_unlock(&local->baplock);
1986 printk(KERN_DEBUG "%s: Received frame with invalid "
1987 "length 0x%04x\n", dev->name, len);
1988 hostap_dump_rx_header(dev->name, &rxdesc);
1989 goto rx_dropped;
1990 }
1991 }
1992
1993 skb = dev_alloc_skb(len + hdr_len);
1994 if (!skb) {
1995 spin_unlock(&local->baplock);
1996 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1997 dev->name);
1998 goto rx_dropped;
1999 }
2000 skb->dev = dev;
2001 skb_put_data(skb, &rxdesc, hdr_len);
2002
2003 if (len > 0)
2004 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2005 spin_unlock(&local->baplock);
2006 if (res) {
2007 printk(KERN_DEBUG "%s: RX failed to read "
2008 "frame data\n", dev->name);
2009 goto rx_dropped;
2010 }
2011
2012 skb_queue_tail(&local->rx_list, skb);
2013 tasklet_schedule(&local->rx_tasklet);
2014
2015 rx_exit:
2016 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2017 if (!rx_pending) {
2018 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2019 }
2020
2021 return;
2022
2023 rx_dropped:
2024 dev->stats.rx_dropped++;
2025 if (skb)
2026 dev_kfree_skb(skb);
2027 goto rx_exit;
2028 }
2029
2030
2031 /* Called only as a tasklet (software IRQ) */
2032 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2033 {
2034 struct hfa384x_rx_frame *rxdesc;
2035 struct net_device *dev = skb->dev;
2036 struct hostap_80211_rx_status stats;
2037 int hdrlen, rx_hdrlen;
2038
2039 rx_hdrlen = sizeof(*rxdesc);
2040 if (skb->len < sizeof(*rxdesc)) {
2041 /* Allow monitor mode to receive shorter frames */
2042 if (local->iw_mode == IW_MODE_MONITOR &&
2043 skb->len >= sizeof(*rxdesc) - 30) {
2044 rx_hdrlen = skb->len;
2045 } else {
2046 dev_kfree_skb(skb);
2047 return;
2048 }
2049 }
2050
2051 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2052
2053 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2054 skb->len >= sizeof(*rxdesc))
2055 hostap_dump_rx_header(dev->name, rxdesc);
2056
2057 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2058 (!local->monitor_allow_fcserr ||
2059 local->iw_mode != IW_MODE_MONITOR))
2060 goto drop;
2061
2062 if (skb->len > PRISM2_DATA_MAXLEN) {
2063 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2064 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2065 goto drop;
2066 }
2067
2068 stats.mac_time = le32_to_cpu(rxdesc->time);
2069 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2070 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2071 stats.rate = rxdesc->rate;
2072
2073 /* Convert Prism2 RX structure into IEEE 802.11 header */
2074 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2075 if (hdrlen > rx_hdrlen)
2076 hdrlen = rx_hdrlen;
2077
2078 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2079 &rxdesc->frame_control, hdrlen);
2080
2081 hostap_80211_rx(dev, skb, &stats);
2082 return;
2083
2084 drop:
2085 dev_kfree_skb(skb);
2086 }
2087
2088
2089 /* Called only as a tasklet (software IRQ) */
2090 static void hostap_rx_tasklet(unsigned long data)
2091 {
2092 local_info_t *local = (local_info_t *) data;
2093 struct sk_buff *skb;
2094
2095 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2096 hostap_rx_skb(local, skb);
2097 }
2098
2099
2100 /* Called only from hardware IRQ */
2101 static void prism2_alloc_ev(struct net_device *dev)
2102 {
2103 struct hostap_interface *iface;
2104 local_info_t *local;
2105 int idx;
2106 u16 fid;
2107
2108 iface = netdev_priv(dev);
2109 local = iface->local;
2110
2111 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2112
2113 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2114
2115 spin_lock(&local->txfidlock);
2116 idx = local->next_alloc;
2117
2118 do {
2119 if (local->txfid[idx] == fid) {
2120 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2121 idx);
2122
2123 #ifndef final_version
2124 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2125 printk("Already released txfid found at idx "
2126 "%d\n", idx);
2127 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2128 printk("Already reserved txfid found at idx "
2129 "%d\n", idx);
2130 #endif
2131 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2132 idx++;
2133 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2134 idx;
2135
2136 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2137 netif_queue_stopped(dev))
2138 netif_wake_queue(dev);
2139
2140 spin_unlock(&local->txfidlock);
2141 return;
2142 }
2143
2144 idx++;
2145 if (idx >= PRISM2_TXFID_COUNT)
2146 idx = 0;
2147 } while (idx != local->next_alloc);
2148
2149 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2150 "read 0x%04x) for alloc event\n", dev->name, fid,
2151 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2152 printk(KERN_DEBUG "TXFIDs:");
2153 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2154 printk(" %04x[%04x]", local->txfid[idx],
2155 local->intransmitfid[idx]);
2156 printk("\n");
2157 spin_unlock(&local->txfidlock);
2158
2159 /* FIX: should probably schedule reset; reference to one txfid was lost
2160 * completely.. Bad things will happen if we run out of txfids
2161 * Actually, this will cause netdev watchdog to notice TX timeout and
2162 * then card reset after all txfids have been leaked. */
2163 }
2164
2165
2166 /* Called only as a tasklet (software IRQ) */
2167 static void hostap_tx_callback(local_info_t *local,
2168 struct hfa384x_tx_frame *txdesc, int ok,
2169 char *payload)
2170 {
2171 u16 sw_support, hdrlen, len;
2172 struct sk_buff *skb;
2173 struct hostap_tx_callback_info *cb;
2174
2175 /* Make sure that frame was from us. */
2176 if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2177 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2178 local->dev->name);
2179 return;
2180 }
2181
2182 sw_support = le32_to_cpu(txdesc->sw_support);
2183
2184 spin_lock(&local->lock);
2185 cb = local->tx_callback;
2186 while (cb != NULL && cb->idx != sw_support)
2187 cb = cb->next;
2188 spin_unlock(&local->lock);
2189
2190 if (cb == NULL) {
2191 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2192 local->dev->name, sw_support);
2193 return;
2194 }
2195
2196 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2197 len = le16_to_cpu(txdesc->data_len);
2198 skb = dev_alloc_skb(hdrlen + len);
2199 if (skb == NULL) {
2200 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2201 "skb\n", local->dev->name);
2202 return;
2203 }
2204
2205 skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2206 if (payload)
2207 skb_put_data(skb, payload, len);
2208
2209 skb->dev = local->dev;
2210 skb_reset_mac_header(skb);
2211
2212 cb->func(skb, ok, cb->data);
2213 }
2214
2215
2216 /* Called only as a tasklet (software IRQ) */
2217 static int hostap_tx_compl_read(local_info_t *local, int error,
2218 struct hfa384x_tx_frame *txdesc,
2219 char **payload)
2220 {
2221 u16 fid, len;
2222 int res, ret = 0;
2223 struct net_device *dev = local->dev;
2224
2225 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2226
2227 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2228
2229 spin_lock(&local->baplock);
2230 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2231 if (!res)
2232 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2233 if (res) {
2234 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2235 "read txdesc\n", dev->name, error, fid);
2236 if (res == -ETIMEDOUT) {
2237 schedule_work(&local->reset_queue);
2238 }
2239 ret = -1;
2240 goto fail;
2241 }
2242 if (txdesc->sw_support) {
2243 len = le16_to_cpu(txdesc->data_len);
2244 if (len < PRISM2_DATA_MAXLEN) {
2245 *payload = kmalloc(len, GFP_ATOMIC);
2246 if (*payload == NULL ||
2247 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2248 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2249 "frame payload\n", dev->name);
2250 kfree(*payload);
2251 *payload = NULL;
2252 ret = -1;
2253 goto fail;
2254 }
2255 }
2256 }
2257
2258 fail:
2259 spin_unlock(&local->baplock);
2260
2261 return ret;
2262 }
2263
2264
2265 /* Called only as a tasklet (software IRQ) */
2266 static void prism2_tx_ev(local_info_t *local)
2267 {
2268 struct net_device *dev = local->dev;
2269 char *payload = NULL;
2270 struct hfa384x_tx_frame txdesc;
2271
2272 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2273 goto fail;
2274
2275 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2276 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2277 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2278 "duration_id=%d\n",
2279 dev->name, le16_to_cpu(txdesc.status),
2280 txdesc.retry_count, txdesc.tx_rate,
2281 le16_to_cpu(txdesc.seq_ctrl),
2282 le16_to_cpu(txdesc.duration_id));
2283 }
2284
2285 if (txdesc.sw_support)
2286 hostap_tx_callback(local, &txdesc, 1, payload);
2287 kfree(payload);
2288
2289 fail:
2290 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2291 }
2292
2293
2294 /* Called only as a tasklet (software IRQ) */
2295 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2296 {
2297 local_info_t *local = (local_info_t *) data;
2298 struct sk_buff *skb;
2299
2300 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2301 struct hfa384x_tx_frame *txdesc =
2302 (struct hfa384x_tx_frame *) skb->data;
2303
2304 if (skb->len >= sizeof(*txdesc)) {
2305 /* Convert Prism2 RX structure into IEEE 802.11 header
2306 */
2307 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2308 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2309 &txdesc->frame_control, hdrlen);
2310
2311 hostap_handle_sta_tx_exc(local, skb);
2312 }
2313 dev_kfree_skb(skb);
2314 }
2315 }
2316
2317
2318 /* Called only as a tasklet (software IRQ) */
2319 static void prism2_txexc(local_info_t *local)
2320 {
2321 struct net_device *dev = local->dev;
2322 u16 status, fc;
2323 int show_dump, res;
2324 char *payload = NULL;
2325 struct hfa384x_tx_frame txdesc;
2326
2327 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2328 dev->stats.tx_errors++;
2329
2330 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2331 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2332 if (res)
2333 return;
2334
2335 status = le16_to_cpu(txdesc.status);
2336
2337 /* We produce a TXDROP event only for retry or lifetime
2338 * exceeded, because that's the only status that really mean
2339 * that this particular node went away.
2340 * Other errors means that *we* screwed up. - Jean II */
2341 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2342 {
2343 union iwreq_data wrqu;
2344
2345 /* Copy 802.11 dest address. */
2346 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2347 wrqu.addr.sa_family = ARPHRD_ETHER;
2348 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2349 } else
2350 show_dump = 1;
2351
2352 if (local->iw_mode == IW_MODE_MASTER ||
2353 local->iw_mode == IW_MODE_REPEAT ||
2354 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2355 struct sk_buff *skb;
2356 skb = dev_alloc_skb(sizeof(txdesc));
2357 if (skb) {
2358 skb_put_data(skb, &txdesc, sizeof(txdesc));
2359 skb_queue_tail(&local->sta_tx_exc_list, skb);
2360 tasklet_schedule(&local->sta_tx_exc_tasklet);
2361 }
2362 }
2363
2364 if (txdesc.sw_support)
2365 hostap_tx_callback(local, &txdesc, 0, payload);
2366 kfree(payload);
2367
2368 if (!show_dump)
2369 return;
2370
2371 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2372 " tx_control=%04x\n",
2373 dev->name, status,
2374 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2375 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2376 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2377 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2378 le16_to_cpu(txdesc.tx_control));
2379
2380 fc = le16_to_cpu(txdesc.frame_control);
2381 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2382 "(%s%s%s::%d%s%s)\n",
2383 txdesc.retry_count, txdesc.tx_rate, fc,
2384 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2385 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2386 ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2387 (fc & IEEE80211_FCTL_STYPE) >> 4,
2388 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2389 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2390 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2391 txdesc.addr1, txdesc.addr2,
2392 txdesc.addr3, txdesc.addr4);
2393 }
2394
2395
2396 /* Called only as a tasklet (software IRQ) */
2397 static void hostap_info_tasklet(unsigned long data)
2398 {
2399 local_info_t *local = (local_info_t *) data;
2400 struct sk_buff *skb;
2401
2402 while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2403 hostap_info_process(local, skb);
2404 dev_kfree_skb(skb);
2405 }
2406 }
2407
2408
2409 /* Called only as a tasklet (software IRQ) */
2410 static void prism2_info(local_info_t *local)
2411 {
2412 struct net_device *dev = local->dev;
2413 u16 fid;
2414 int res, left;
2415 struct hfa384x_info_frame info;
2416 struct sk_buff *skb;
2417
2418 fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2419
2420 spin_lock(&local->baplock);
2421 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2422 if (!res)
2423 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2424 if (res) {
2425 spin_unlock(&local->baplock);
2426 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2427 fid);
2428 if (res == -ETIMEDOUT) {
2429 schedule_work(&local->reset_queue);
2430 }
2431 goto out;
2432 }
2433
2434 left = (le16_to_cpu(info.len) - 1) * 2;
2435
2436 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2437 /* data register seems to give 0x8000 in some error cases even
2438 * though busy bit is not set in offset register;
2439 * in addition, length must be at least 1 due to type field */
2440 spin_unlock(&local->baplock);
2441 printk(KERN_DEBUG "%s: Received info frame with invalid "
2442 "length 0x%04x (type 0x%04x)\n", dev->name,
2443 le16_to_cpu(info.len), le16_to_cpu(info.type));
2444 goto out;
2445 }
2446
2447 skb = dev_alloc_skb(sizeof(info) + left);
2448 if (skb == NULL) {
2449 spin_unlock(&local->baplock);
2450 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2451 "frame\n", dev->name);
2452 goto out;
2453 }
2454
2455 skb_put_data(skb, &info, sizeof(info));
2456 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2457 {
2458 spin_unlock(&local->baplock);
2459 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2460 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2461 le16_to_cpu(info.len), le16_to_cpu(info.type));
2462 dev_kfree_skb(skb);
2463 goto out;
2464 }
2465 spin_unlock(&local->baplock);
2466
2467 skb_queue_tail(&local->info_list, skb);
2468 tasklet_schedule(&local->info_tasklet);
2469
2470 out:
2471 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2472 }
2473
2474
2475 /* Called only as a tasklet (software IRQ) */
2476 static void hostap_bap_tasklet(unsigned long data)
2477 {
2478 local_info_t *local = (local_info_t *) data;
2479 struct net_device *dev = local->dev;
2480 u16 ev;
2481 int frames = 30;
2482
2483 if (local->func->card_present && !local->func->card_present(local))
2484 return;
2485
2486 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2487
2488 /* Process all pending BAP events without generating new interrupts
2489 * for them */
2490 while (frames-- > 0) {
2491 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2492 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2493 break;
2494 if (ev & HFA384X_EV_RX)
2495 prism2_rx(local);
2496 if (ev & HFA384X_EV_INFO)
2497 prism2_info(local);
2498 if (ev & HFA384X_EV_TX)
2499 prism2_tx_ev(local);
2500 if (ev & HFA384X_EV_TXEXC)
2501 prism2_txexc(local);
2502 }
2503
2504 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2505 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2506
2507 /* Enable interrupts for new BAP events */
2508 hfa384x_events_all(dev);
2509 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2510 }
2511
2512
2513 /* Called only from hardware IRQ */
2514 static void prism2_infdrop(struct net_device *dev)
2515 {
2516 static unsigned long last_inquire = 0;
2517
2518 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2519
2520 /* some firmware versions seem to get stuck with
2521 * full CommTallies in high traffic load cases; every
2522 * packet will then cause INFDROP event and CommTallies
2523 * info frame will not be sent automatically. Try to
2524 * get out of this state by inquiring CommTallies. */
2525 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2526 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2527 HFA384X_INFO_COMMTALLIES, NULL, 0);
2528 last_inquire = jiffies;
2529 }
2530 }
2531
2532
2533 /* Called only from hardware IRQ */
2534 static void prism2_ev_tick(struct net_device *dev)
2535 {
2536 struct hostap_interface *iface;
2537 local_info_t *local;
2538 u16 evstat, inten;
2539 static int prev_stuck = 0;
2540
2541 iface = netdev_priv(dev);
2542 local = iface->local;
2543
2544 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2545 local->last_tick_timer) {
2546 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2547 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2548 if (!prev_stuck) {
2549 printk(KERN_INFO "%s: SW TICK stuck? "
2550 "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2551 dev->name, local->bits, evstat, inten);
2552 }
2553 local->sw_tick_stuck++;
2554 if ((evstat & HFA384X_BAP0_EVENTS) &&
2555 (inten & HFA384X_BAP0_EVENTS)) {
2556 printk(KERN_INFO "%s: trying to recover from IRQ "
2557 "hang\n", dev->name);
2558 hfa384x_events_no_bap0(dev);
2559 }
2560 prev_stuck = 1;
2561 } else
2562 prev_stuck = 0;
2563 }
2564
2565
2566 /* Called only from hardware IRQ */
2567 static void prism2_check_magic(local_info_t *local)
2568 {
2569 /* at least PCI Prism2.5 with bus mastering seems to sometimes
2570 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2571 * register once or twice seems to get the correct value.. PCI cards
2572 * cannot anyway be removed during normal operation, so there is not
2573 * really any need for this verification with them. */
2574
2575 #ifndef PRISM2_PCI
2576 #ifndef final_version
2577 static unsigned long last_magic_err = 0;
2578 struct net_device *dev = local->dev;
2579
2580 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2581 if (!local->hw_ready)
2582 return;
2583 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2584 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2585 printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2586 "%04X != %04X - card removed?\n", dev->name,
2587 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2588 HFA384X_MAGIC);
2589 last_magic_err = jiffies;
2590 } else if (net_ratelimit()) {
2591 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2592 "MAGIC=%04x\n", dev->name,
2593 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2594 HFA384X_MAGIC);
2595 }
2596 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2597 schedule_work(&local->reset_queue);
2598 return;
2599 }
2600 #endif /* final_version */
2601 #endif /* !PRISM2_PCI */
2602 }
2603
2604
2605 /* Called only from hardware IRQ */
2606 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2607 {
2608 struct net_device *dev = dev_id;
2609 struct hostap_interface *iface;
2610 local_info_t *local;
2611 int events = 0;
2612 u16 ev;
2613
2614 iface = netdev_priv(dev);
2615 local = iface->local;
2616
2617 /* Detect early interrupt before driver is fully configured */
2618 spin_lock(&local->irq_init_lock);
2619 if (!dev->base_addr) {
2620 if (net_ratelimit()) {
2621 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2622 dev->name);
2623 }
2624 spin_unlock(&local->irq_init_lock);
2625 return IRQ_HANDLED;
2626 }
2627 spin_unlock(&local->irq_init_lock);
2628
2629 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2630
2631 if (local->func->card_present && !local->func->card_present(local)) {
2632 if (net_ratelimit()) {
2633 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2634 dev->name);
2635 }
2636 return IRQ_HANDLED;
2637 }
2638
2639 prism2_check_magic(local);
2640
2641 for (;;) {
2642 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2643 if (ev == 0xffff) {
2644 if (local->shutdown)
2645 return IRQ_HANDLED;
2646 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2647 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2648 dev->name);
2649 return IRQ_HANDLED;
2650 }
2651
2652 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2653 if (ev == 0)
2654 break;
2655
2656 if (ev & HFA384X_EV_CMD) {
2657 prism2_cmd_ev(dev);
2658 }
2659
2660 /* Above events are needed even before hw is ready, but other
2661 * events should be skipped during initialization. This may
2662 * change for AllocEv if allocate_fid is implemented without
2663 * busy waiting. */
2664 if (!local->hw_ready || local->hw_resetting ||
2665 !local->dev_enabled) {
2666 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2667 if (ev & HFA384X_EV_CMD)
2668 goto next_event;
2669 if ((ev & HFA384X_EVENT_MASK) == 0)
2670 return IRQ_HANDLED;
2671 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2672 net_ratelimit()) {
2673 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2674 "not ready; skipping events 0x%04x "
2675 "(IntEn=0x%04x)%s%s%s\n",
2676 dev->name, ev,
2677 HFA384X_INW(HFA384X_INTEN_OFF),
2678 !local->hw_ready ? " (!hw_ready)" : "",
2679 local->hw_resetting ?
2680 " (hw_resetting)" : "",
2681 !local->dev_enabled ?
2682 " (!dev_enabled)" : "");
2683 }
2684 HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2685 return IRQ_HANDLED;
2686 }
2687
2688 if (ev & HFA384X_EV_TICK) {
2689 prism2_ev_tick(dev);
2690 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2691 }
2692
2693 if (ev & HFA384X_EV_ALLOC) {
2694 prism2_alloc_ev(dev);
2695 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2696 }
2697
2698 /* Reading data from the card is quite time consuming, so do it
2699 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2700 * and unmasked after needed data has been read completely. */
2701 if (ev & HFA384X_BAP0_EVENTS) {
2702 hfa384x_events_no_bap0(dev);
2703 tasklet_schedule(&local->bap_tasklet);
2704 }
2705
2706 #ifndef final_version
2707 if (ev & HFA384X_EV_WTERR) {
2708 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2709 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2710 }
2711 #endif /* final_version */
2712
2713 if (ev & HFA384X_EV_INFDROP) {
2714 prism2_infdrop(dev);
2715 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2716 }
2717
2718 next_event:
2719 events++;
2720 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2721 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2722 "(EvStat=0x%04x)\n",
2723 PRISM2_MAX_INTERRUPT_EVENTS,
2724 HFA384X_INW(HFA384X_EVSTAT_OFF));
2725 break;
2726 }
2727 }
2728 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2729 return IRQ_RETVAL(events);
2730 }
2731
2732
2733 static void prism2_check_sta_fw_version(local_info_t *local)
2734 {
2735 struct hfa384x_comp_ident comp;
2736 int id, variant, major, minor;
2737
2738 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2739 &comp, sizeof(comp), 1) < 0)
2740 return;
2741
2742 local->fw_ap = 0;
2743 id = le16_to_cpu(comp.id);
2744 if (id != HFA384X_COMP_ID_STA) {
2745 if (id == HFA384X_COMP_ID_FW_AP)
2746 local->fw_ap = 1;
2747 return;
2748 }
2749
2750 major = __le16_to_cpu(comp.major);
2751 minor = __le16_to_cpu(comp.minor);
2752 variant = __le16_to_cpu(comp.variant);
2753 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2754
2755 /* Station firmware versions before 1.4.x seem to have a bug in
2756 * firmware-based WEP encryption when using Host AP mode, so use
2757 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2758 * first one that has been seen to produce correct encryption, but the
2759 * bug might be fixed before that (although, at least 1.4.2 is broken).
2760 */
2761 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2762
2763 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2764 !local->fw_encrypt_ok) {
2765 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2766 "a workaround for firmware bug in Host AP mode WEP\n",
2767 local->dev->name);
2768 local->host_encrypt = 1;
2769 }
2770
2771 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2772 * in station firmware versions before 1.5.x. With these versions, the
2773 * driver uses a workaround with bogus frame format (4th address after
2774 * the payload). This is not compatible with other AP devices. Since
2775 * the firmware bug is fixed in the latest station firmware versions,
2776 * automatically enable standard compliant mode for cards using station
2777 * firmware version 1.5.0 or newer. */
2778 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2779 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2780 else {
2781 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2782 "workaround for firmware bug in Host AP mode WDS\n",
2783 local->dev->name);
2784 }
2785
2786 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2787 }
2788
2789
2790 static void hostap_passive_scan(struct timer_list *t)
2791 {
2792 local_info_t *local = from_timer(local, t, passive_scan_timer);
2793 struct net_device *dev = local->dev;
2794 u16 chan;
2795
2796 if (local->passive_scan_interval <= 0)
2797 return;
2798
2799 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2800 int max_tries = 16;
2801
2802 /* Even though host system does not really know when the WLAN
2803 * MAC is sending frames, try to avoid changing channels for
2804 * passive scanning when a host-generated frame is being
2805 * transmitted */
2806 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2807 printk(KERN_DEBUG "%s: passive scan detected pending "
2808 "TX - delaying\n", dev->name);
2809 local->passive_scan_timer.expires = jiffies + HZ / 10;
2810 add_timer(&local->passive_scan_timer);
2811 return;
2812 }
2813
2814 do {
2815 local->passive_scan_channel++;
2816 if (local->passive_scan_channel > 14)
2817 local->passive_scan_channel = 1;
2818 max_tries--;
2819 } while (!(local->channel_mask &
2820 (1 << (local->passive_scan_channel - 1))) &&
2821 max_tries > 0);
2822
2823 if (max_tries == 0) {
2824 printk(KERN_INFO "%s: no allowed passive scan channels"
2825 " found\n", dev->name);
2826 return;
2827 }
2828
2829 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2830 dev->name, local->passive_scan_channel);
2831 chan = local->passive_scan_channel;
2832 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2833 local->passive_scan_timer.expires = jiffies + HZ / 10;
2834 } else {
2835 chan = local->channel;
2836 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2837 local->passive_scan_timer.expires = jiffies +
2838 local->passive_scan_interval * HZ;
2839 }
2840
2841 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2842 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2843 chan, NULL, 0))
2844 printk(KERN_ERR "%s: passive scan channel set %d "
2845 "failed\n", dev->name, chan);
2846
2847 add_timer(&local->passive_scan_timer);
2848 }
2849
2850
2851 /* Called only as a scheduled task when communications quality values should
2852 * be updated. */
2853 static void handle_comms_qual_update(struct work_struct *work)
2854 {
2855 local_info_t *local =
2856 container_of(work, local_info_t, comms_qual_update);
2857 prism2_update_comms_qual(local->dev);
2858 }
2859
2860
2861 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2862 * used to monitor that local->last_tick_timer is being updated. If not,
2863 * interrupt busy-loop is assumed and driver tries to recover by masking out
2864 * some events. */
2865 static void hostap_tick_timer(struct timer_list *t)
2866 {
2867 static unsigned long last_inquire = 0;
2868 local_info_t *local = from_timer(local, t, tick_timer);
2869 local->last_tick_timer = jiffies;
2870
2871 /* Inquire CommTallies every 10 seconds to keep the statistics updated
2872 * more often during low load and when using 32-bit tallies. */
2873 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2874 !local->hw_downloading && local->hw_ready &&
2875 !local->hw_resetting && local->dev_enabled) {
2876 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2877 HFA384X_INFO_COMMTALLIES, NULL, 0);
2878 last_inquire = jiffies;
2879 }
2880
2881 if ((local->last_comms_qual_update == 0 ||
2882 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2883 (local->iw_mode == IW_MODE_INFRA ||
2884 local->iw_mode == IW_MODE_ADHOC)) {
2885 schedule_work(&local->comms_qual_update);
2886 }
2887
2888 local->tick_timer.expires = jiffies + 2 * HZ;
2889 add_timer(&local->tick_timer);
2890 }
2891
2892
2893 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
2894 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
2895 {
2896 return HFA384X_INW(reg);
2897 }
2898
2899 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2900 {
2901 local_info_t *local = m->private;
2902
2903 #define SHOW_REG(n) \
2904 seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2905
2906 SHOW_REG(CMD);
2907 SHOW_REG(PARAM0);
2908 SHOW_REG(PARAM1);
2909 SHOW_REG(PARAM2);
2910 SHOW_REG(STATUS);
2911 SHOW_REG(RESP0);
2912 SHOW_REG(RESP1);
2913 SHOW_REG(RESP2);
2914 SHOW_REG(INFOFID);
2915 SHOW_REG(CONTROL);
2916 SHOW_REG(SELECT0);
2917 SHOW_REG(SELECT1);
2918 SHOW_REG(OFFSET0);
2919 SHOW_REG(OFFSET1);
2920 SHOW_REG(RXFID);
2921 SHOW_REG(ALLOCFID);
2922 SHOW_REG(TXCOMPLFID);
2923 SHOW_REG(SWSUPPORT0);
2924 SHOW_REG(SWSUPPORT1);
2925 SHOW_REG(SWSUPPORT2);
2926 SHOW_REG(EVSTAT);
2927 SHOW_REG(INTEN);
2928 SHOW_REG(EVACK);
2929 /* Do not read data registers, because they change the state of the
2930 * MAC (offset += 2) */
2931 /* SHOW_REG(DATA0); */
2932 /* SHOW_REG(DATA1); */
2933 SHOW_REG(AUXPAGE);
2934 SHOW_REG(AUXOFFSET);
2935 /* SHOW_REG(AUXDATA); */
2936 #ifdef PRISM2_PCI
2937 SHOW_REG(PCICOR);
2938 SHOW_REG(PCIHCR);
2939 SHOW_REG(PCI_M0_ADDRH);
2940 SHOW_REG(PCI_M0_ADDRL);
2941 SHOW_REG(PCI_M0_LEN);
2942 SHOW_REG(PCI_M0_CTL);
2943 SHOW_REG(PCI_STATUS);
2944 SHOW_REG(PCI_M1_ADDRH);
2945 SHOW_REG(PCI_M1_ADDRL);
2946 SHOW_REG(PCI_M1_LEN);
2947 SHOW_REG(PCI_M1_CTL);
2948 #endif /* PRISM2_PCI */
2949
2950 return 0;
2951 }
2952 #endif
2953
2954 struct set_tim_data {
2955 struct list_head list;
2956 int aid;
2957 int set;
2958 };
2959
2960 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2961 {
2962 struct list_head *ptr;
2963 struct set_tim_data *new_entry;
2964 struct hostap_interface *iface;
2965 local_info_t *local;
2966
2967 iface = netdev_priv(dev);
2968 local = iface->local;
2969
2970 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2971 if (new_entry == NULL)
2972 return -ENOMEM;
2973
2974 new_entry->aid = aid;
2975 new_entry->set = set;
2976
2977 spin_lock_bh(&local->set_tim_lock);
2978 list_for_each(ptr, &local->set_tim_list) {
2979 struct set_tim_data *entry =
2980 list_entry(ptr, struct set_tim_data, list);
2981 if (entry->aid == aid) {
2982 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2983 "set=%d ==> %d\n",
2984 local->dev->name, aid, entry->set, set);
2985 entry->set = set;
2986 kfree(new_entry);
2987 new_entry = NULL;
2988 break;
2989 }
2990 }
2991 if (new_entry)
2992 list_add_tail(&new_entry->list, &local->set_tim_list);
2993 spin_unlock_bh(&local->set_tim_lock);
2994
2995 schedule_work(&local->set_tim_queue);
2996
2997 return 0;
2998 }
2999
3000
3001 static void handle_set_tim_queue(struct work_struct *work)
3002 {
3003 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3004 struct set_tim_data *entry;
3005 u16 val;
3006
3007 for (;;) {
3008 entry = NULL;
3009 spin_lock_bh(&local->set_tim_lock);
3010 if (!list_empty(&local->set_tim_list)) {
3011 entry = list_entry(local->set_tim_list.next,
3012 struct set_tim_data, list);
3013 list_del(&entry->list);
3014 }
3015 spin_unlock_bh(&local->set_tim_lock);
3016 if (!entry)
3017 break;
3018
3019 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3020 local->dev->name, entry->aid, entry->set);
3021
3022 val = entry->aid;
3023 if (entry->set)
3024 val |= 0x8000;
3025 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3026 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3027 "set=%d)\n",
3028 local->dev->name, entry->aid, entry->set);
3029 }
3030
3031 kfree(entry);
3032 }
3033 }
3034
3035
3036 static void prism2_clear_set_tim_queue(local_info_t *local)
3037 {
3038 struct list_head *ptr, *n;
3039
3040 list_for_each_safe(ptr, n, &local->set_tim_list) {
3041 struct set_tim_data *entry;
3042 entry = list_entry(ptr, struct set_tim_data, list);
3043 list_del(&entry->list);
3044 kfree(entry);
3045 }
3046 }
3047
3048
3049 /*
3050 * HostAP uses two layers of net devices, where the inner
3051 * layer gets called all the time from the outer layer.
3052 * This is a natural nesting, which needs a split lock type.
3053 */
3054 static struct lock_class_key hostap_netdev_xmit_lock_key;
3055 static struct lock_class_key hostap_netdev_addr_lock_key;
3056
3057 static void prism2_set_lockdep_class_one(struct net_device *dev,
3058 struct netdev_queue *txq,
3059 void *_unused)
3060 {
3061 lockdep_set_class(&txq->_xmit_lock,
3062 &hostap_netdev_xmit_lock_key);
3063 }
3064
3065 static void prism2_set_lockdep_class(struct net_device *dev)
3066 {
3067 lockdep_set_class(&dev->addr_list_lock,
3068 &hostap_netdev_addr_lock_key);
3069 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3070 }
3071
3072 static struct net_device *
3073 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3074 struct device *sdev)
3075 {
3076 struct net_device *dev;
3077 struct hostap_interface *iface;
3078 struct local_info *local;
3079 int len, i, ret;
3080
3081 if (funcs == NULL)
3082 return NULL;
3083
3084 len = strlen(dev_template);
3085 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3086 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3087 dev_template);
3088 return NULL;
3089 }
3090
3091 len = sizeof(struct hostap_interface) +
3092 3 + sizeof(struct local_info) +
3093 3 + sizeof(struct ap_data);
3094
3095 dev = alloc_etherdev(len);
3096 if (dev == NULL)
3097 return NULL;
3098
3099 iface = netdev_priv(dev);
3100 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3101 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3102 local->dev = iface->dev = dev;
3103 iface->local = local;
3104 iface->type = HOSTAP_INTERFACE_MASTER;
3105 INIT_LIST_HEAD(&local->hostap_interfaces);
3106
3107 local->hw_module = THIS_MODULE;
3108
3109 #ifdef PRISM2_IO_DEBUG
3110 local->io_debug_enabled = 1;
3111 #endif /* PRISM2_IO_DEBUG */
3112
3113 local->func = funcs;
3114 local->func->cmd = hfa384x_cmd;
3115 local->func->read_regs = hfa384x_read_regs;
3116 local->func->get_rid = hfa384x_get_rid;
3117 local->func->set_rid = hfa384x_set_rid;
3118 local->func->hw_enable = prism2_hw_enable;
3119 local->func->hw_config = prism2_hw_config;
3120 local->func->hw_reset = prism2_hw_reset;
3121 local->func->hw_shutdown = prism2_hw_shutdown;
3122 local->func->reset_port = prism2_reset_port;
3123 local->func->schedule_reset = prism2_schedule_reset;
3124 #ifdef PRISM2_DOWNLOAD_SUPPORT
3125 local->func->read_aux_fops = &prism2_download_aux_dump_proc_fops;
3126 local->func->download = prism2_download;
3127 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3128 local->func->tx = prism2_tx_80211;
3129 local->func->set_tim = prism2_set_tim;
3130 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3131 * skb->data (FIX: maybe for DMA bus
3132 * mastering? */
3133
3134 local->mtu = mtu;
3135
3136 rwlock_init(&local->iface_lock);
3137 spin_lock_init(&local->txfidlock);
3138 spin_lock_init(&local->cmdlock);
3139 spin_lock_init(&local->baplock);
3140 spin_lock_init(&local->lock);
3141 spin_lock_init(&local->irq_init_lock);
3142 mutex_init(&local->rid_bap_mtx);
3143
3144 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3145 card_idx = 0;
3146 local->card_idx = card_idx;
3147
3148 len = strlen(essid);
3149 memcpy(local->essid, essid,
3150 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3151 local->essid[MAX_SSID_LEN] = '\0';
3152 i = GET_INT_PARM(iw_mode, card_idx);
3153 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3154 i == IW_MODE_MONITOR) {
3155 local->iw_mode = i;
3156 } else {
3157 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3158 "IW_MODE_MASTER\n", i);
3159 local->iw_mode = IW_MODE_MASTER;
3160 }
3161 local->channel = GET_INT_PARM(channel, card_idx);
3162 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3163 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3164 local->wds_max_connections = 16;
3165 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3166 local->manual_retry_count = -1;
3167 local->rts_threshold = 2347;
3168 local->fragm_threshold = 2346;
3169 local->rssi_to_dBm = 100; /* default; to be overriden by
3170 * cnfDbmAdjust, if available */
3171 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3172 local->sram_type = -1;
3173 local->scan_channel_mask = 0xffff;
3174 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3175
3176 /* Initialize task queue structures */
3177 INIT_WORK(&local->reset_queue, handle_reset_queue);
3178 INIT_WORK(&local->set_multicast_list_queue,
3179 hostap_set_multicast_list_queue);
3180
3181 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3182 INIT_LIST_HEAD(&local->set_tim_list);
3183 spin_lock_init(&local->set_tim_lock);
3184
3185 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3186
3187 /* Initialize tasklets for handling hardware IRQ related operations
3188 * outside hw IRQ handler */
3189 #define HOSTAP_TASKLET_INIT(q, f, d) \
3190 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3191 while (0)
3192 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3193 (unsigned long) local);
3194
3195 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3196 (unsigned long) local);
3197 hostap_info_init(local);
3198
3199 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3200 hostap_rx_tasklet, (unsigned long) local);
3201 skb_queue_head_init(&local->rx_list);
3202
3203 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3204 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3205 skb_queue_head_init(&local->sta_tx_exc_list);
3206
3207 INIT_LIST_HEAD(&local->cmd_queue);
3208 init_waitqueue_head(&local->hostscan_wq);
3209
3210 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3211
3212 timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3213 timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3214 local->tick_timer.expires = jiffies + 2 * HZ;
3215 add_timer(&local->tick_timer);
3216
3217 INIT_LIST_HEAD(&local->bss_list);
3218
3219 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3220
3221 dev->type = ARPHRD_IEEE80211;
3222 dev->header_ops = &hostap_80211_ops;
3223
3224 rtnl_lock();
3225 ret = dev_alloc_name(dev, "wifi%d");
3226 SET_NETDEV_DEV(dev, sdev);
3227 if (ret >= 0)
3228 ret = register_netdevice(dev);
3229
3230 prism2_set_lockdep_class(dev);
3231 rtnl_unlock();
3232 if (ret < 0) {
3233 printk(KERN_WARNING "%s: register netdevice failed!\n",
3234 dev_info);
3235 goto fail;
3236 }
3237 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3238
3239 hostap_init_data(local);
3240 return dev;
3241
3242 fail:
3243 free_netdev(dev);
3244 return NULL;
3245 }
3246
3247
3248 static int hostap_hw_ready(struct net_device *dev)
3249 {
3250 struct hostap_interface *iface;
3251 struct local_info *local;
3252
3253 iface = netdev_priv(dev);
3254 local = iface->local;
3255 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3256 "", dev_template);
3257
3258 if (local->ddev) {
3259 if (local->iw_mode == IW_MODE_INFRA ||
3260 local->iw_mode == IW_MODE_ADHOC) {
3261 netif_carrier_off(local->dev);
3262 netif_carrier_off(local->ddev);
3263 }
3264 hostap_init_proc(local);
3265 #ifndef PRISM2_NO_PROCFS_DEBUG
3266 proc_create_single_data("registers", 0, local->proc,
3267 prism2_registers_proc_show, local);
3268 #endif /* PRISM2_NO_PROCFS_DEBUG */
3269 hostap_init_ap_proc(local);
3270 return 0;
3271 }
3272
3273 return -1;
3274 }
3275
3276
3277 static void prism2_free_local_data(struct net_device *dev)
3278 {
3279 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3280 int i;
3281 struct hostap_interface *iface;
3282 struct local_info *local;
3283 struct list_head *ptr, *n;
3284
3285 if (dev == NULL)
3286 return;
3287
3288 iface = netdev_priv(dev);
3289 local = iface->local;
3290
3291 /* Unregister all netdevs before freeing local data. */
3292 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3293 iface = list_entry(ptr, struct hostap_interface, list);
3294 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3295 /* special handling for this interface below */
3296 continue;
3297 }
3298 hostap_remove_interface(iface->dev, 0, 1);
3299 }
3300
3301 unregister_netdev(local->dev);
3302
3303 flush_work(&local->reset_queue);
3304 flush_work(&local->set_multicast_list_queue);
3305 flush_work(&local->set_tim_queue);
3306 #ifndef PRISM2_NO_STATION_MODES
3307 flush_work(&local->info_queue);
3308 #endif
3309 flush_work(&local->comms_qual_update);
3310
3311 lib80211_crypt_info_free(&local->crypt_info);
3312
3313 if (timer_pending(&local->passive_scan_timer))
3314 del_timer(&local->passive_scan_timer);
3315
3316 if (timer_pending(&local->tick_timer))
3317 del_timer(&local->tick_timer);
3318
3319 prism2_clear_cmd_queue(local);
3320
3321 skb_queue_purge(&local->info_list);
3322 skb_queue_purge(&local->rx_list);
3323 skb_queue_purge(&local->sta_tx_exc_list);
3324
3325 if (local->dev_enabled)
3326 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3327
3328 if (local->ap != NULL)
3329 hostap_free_data(local->ap);
3330
3331 #ifndef PRISM2_NO_PROCFS_DEBUG
3332 if (local->proc != NULL)
3333 remove_proc_entry("registers", local->proc);
3334 #endif /* PRISM2_NO_PROCFS_DEBUG */
3335 hostap_remove_proc(local);
3336
3337 tx_cb = local->tx_callback;
3338 while (tx_cb != NULL) {
3339 tx_cb_prev = tx_cb;
3340 tx_cb = tx_cb->next;
3341 kfree(tx_cb_prev);
3342 }
3343
3344 hostap_set_hostapd(local, 0, 0);
3345 hostap_set_hostapd_sta(local, 0, 0);
3346
3347 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3348 if (local->frag_cache[i].skb != NULL)
3349 dev_kfree_skb(local->frag_cache[i].skb);
3350 }
3351
3352 #ifdef PRISM2_DOWNLOAD_SUPPORT
3353 prism2_download_free_data(local->dl_pri);
3354 prism2_download_free_data(local->dl_sec);
3355 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3356
3357 prism2_clear_set_tim_queue(local);
3358
3359 list_for_each_safe(ptr, n, &local->bss_list) {
3360 struct hostap_bss_info *bss =
3361 list_entry(ptr, struct hostap_bss_info, list);
3362 kfree(bss);
3363 }
3364
3365 kfree(local->pda);
3366 kfree(local->last_scan_results);
3367 kfree(local->generic_elem);
3368
3369 free_netdev(local->dev);
3370 }
3371
3372
3373 #if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3374 static void prism2_suspend(struct net_device *dev)
3375 {
3376 struct hostap_interface *iface;
3377 struct local_info *local;
3378 union iwreq_data wrqu;
3379
3380 iface = netdev_priv(dev);
3381 local = iface->local;
3382
3383 /* Send disconnect event, e.g., to trigger reassociation after resume
3384 * if wpa_supplicant is used. */
3385 memset(&wrqu, 0, sizeof(wrqu));
3386 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3387 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3388
3389 /* Disable hardware and firmware */
3390 prism2_hw_shutdown(dev, 0);
3391 }
3392 #endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3393
3394
3395 /* These might at some point be compiled separately and used as separate
3396 * kernel modules or linked into one */
3397 #ifdef PRISM2_DOWNLOAD_SUPPORT
3398 #include "hostap_download.c"
3399 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3400
3401 #ifdef PRISM2_CALLBACK
3402 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3403 * This can use platform specific code and must define prism2_callback()
3404 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3405 * used. */
3406 #include "hostap_callback.c"
3407 #endif /* PRISM2_CALLBACK */
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