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1/*
2 * Host AP (software wireless LAN access point) driver for
3 * Intersil Prism2/2.5/3.
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <j@w1.fi>
7 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation. See README and COPYING for
12 * more details.
13 *
14 * FIX:
15 * - there is currently no way of associating TX packets to correct wds device
16 * when TX Exc/OK event occurs, so all tx_packets and some
17 * tx_errors/tx_dropped are added to the main netdevice; using sw_support
18 * field in txdesc might be used to fix this (using Alloc event to increment
19 * tx_packets would need some further info in txfid table)
20 *
21 * Buffer Access Path (BAP) usage:
22 * Prism2 cards have two separate BAPs for accessing the card memory. These
23 * should allow concurrent access to two different frames and the driver
24 * previously used BAP0 for sending data and BAP1 for receiving data.
25 * However, there seems to be number of issues with concurrent access and at
26 * least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
27 * Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
28 * host and card memories. BAP0 accesses are protected with local->baplock
29 * (spin_lock_bh) to prevent concurrent use.
30 */
31
32
33
34#include <asm/delay.h>
35#include <asm/uaccess.h>
36
37#include <linux/slab.h>
38#include <linux/netdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/proc_fs.h>
41#include <linux/if_arp.h>
42#include <linux/delay.h>
43#include <linux/random.h>
44#include <linux/wait.h>
45#include <linux/sched.h>
46#include <linux/rtnetlink.h>
47#include <linux/wireless.h>
48#include <net/iw_handler.h>
49#include <net/lib80211.h>
50#include <asm/irq.h>
51
52#include "hostap_80211.h"
53#include "hostap.h"
54#include "hostap_ap.h"
55
56
57/* #define final_version */
58
59static int mtu = 1500;
60module_param(mtu, int, 0444);
61MODULE_PARM_DESC(mtu, "Maximum transfer unit");
62
63static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
64module_param_array(channel, int, NULL, 0444);
65MODULE_PARM_DESC(channel, "Initial channel");
66
67static char essid[33] = "test";
68module_param_string(essid, essid, sizeof(essid), 0444);
69MODULE_PARM_DESC(essid, "Host AP's ESSID");
70
71static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
72module_param_array(iw_mode, int, NULL, 0444);
73MODULE_PARM_DESC(iw_mode, "Initial operation mode");
74
75static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
76module_param_array(beacon_int, int, NULL, 0444);
77MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
78
79static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
80module_param_array(dtim_period, int, NULL, 0444);
81MODULE_PARM_DESC(dtim_period, "DTIM period");
82
83static char dev_template[16] = "wlan%d";
84module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
85MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
86 "wlan%d)");
87
88#ifdef final_version
89#define EXTRA_EVENTS_WTERR 0
90#else
91/* check WTERR events (Wait Time-out) in development versions */
92#define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
93#endif
94
95/* Events that will be using BAP0 */
96#define HFA384X_BAP0_EVENTS \
97 (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
98
99/* event mask, i.e., events that will result in an interrupt */
100#define HFA384X_EVENT_MASK \
101 (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
102 HFA384X_EV_CMD | HFA384X_EV_TICK | \
103 EXTRA_EVENTS_WTERR)
104
105/* Default TX control flags: use 802.11 headers and request interrupt for
106 * failed transmits. Frames that request ACK callback, will add
107 * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
108 */
109#define HFA384X_TX_CTRL_FLAGS \
110 (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
111
112
113/* ca. 1 usec */
114#define HFA384X_CMD_BUSY_TIMEOUT 5000
115#define HFA384X_BAP_BUSY_TIMEOUT 50000
116
117/* ca. 10 usec */
118#define HFA384X_CMD_COMPL_TIMEOUT 20000
119#define HFA384X_DL_COMPL_TIMEOUT 1000000
120
121/* Wait times for initialization; yield to other processes to avoid busy
122 * waiting for long time. */
123#define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
124#define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
125
126
127static void prism2_hw_reset(struct net_device *dev);
128static void prism2_check_sta_fw_version(local_info_t *local);
129
130#ifdef PRISM2_DOWNLOAD_SUPPORT
131/* hostap_download.c */
132static int prism2_download_aux_dump(struct net_device *dev,
133 unsigned int addr, int len, u8 *buf);
134static u8 * prism2_read_pda(struct net_device *dev);
135static int prism2_download(local_info_t *local,
136 struct prism2_download_param *param);
137static void prism2_download_free_data(struct prism2_download_data *dl);
138static int prism2_download_volatile(local_info_t *local,
139 struct prism2_download_data *param);
140static int prism2_download_genesis(local_info_t *local,
141 struct prism2_download_data *param);
142static 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
155static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
156{
157 return HFA384X_INW(reg);
158}
159
160
161static void hfa384x_read_regs(struct net_device *dev,
162 struct hfa384x_regs *regs)
163{
164 regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
165 regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
166 regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
167 regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
168 regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
169}
170
171
172/**
173 * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
174 * @local: pointer to private Host AP driver data
175 * @entry: Prism2 command queue entry to be freed
176 * @del_req: request the entry to be removed
177 *
178 * Internal helper function for freeing Prism2 command queue entries.
179 * Caller must have acquired local->cmdlock before calling this function.
180 */
181static inline void __hostap_cmd_queue_free(local_info_t *local,
182 struct hostap_cmd_queue *entry,
183 int del_req)
184{
185 if (del_req) {
186 entry->del_req = 1;
187 if (!list_empty(&entry->list)) {
188 list_del_init(&entry->list);
189 local->cmd_queue_len--;
190 }
191 }
192
193 if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
194 kfree(entry);
195}
196
197
198/**
199 * hostap_cmd_queue_free - Free Prism2 command queue entry
200 * @local: pointer to private Host AP driver data
201 * @entry: Prism2 command queue entry to be freed
202 * @del_req: request the entry to be removed
203 *
204 * Free a Prism2 command queue entry.
205 */
206static inline void hostap_cmd_queue_free(local_info_t *local,
207 struct hostap_cmd_queue *entry,
208 int del_req)
209{
210 unsigned long flags;
211
212 spin_lock_irqsave(&local->cmdlock, flags);
213 __hostap_cmd_queue_free(local, entry, del_req);
214 spin_unlock_irqrestore(&local->cmdlock, flags);
215}
216
217
218/**
219 * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
220 * @local: pointer to private Host AP driver data
221 */
222static void prism2_clear_cmd_queue(local_info_t *local)
223{
224 struct list_head *ptr, *n;
225 unsigned long flags;
226 struct hostap_cmd_queue *entry;
227
228 spin_lock_irqsave(&local->cmdlock, flags);
229 list_for_each_safe(ptr, n, &local->cmd_queue) {
230 entry = list_entry(ptr, struct hostap_cmd_queue, list);
231 atomic_inc(&entry->usecnt);
232 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
233 "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
234 local->dev->name, entry->type, entry->cmd,
235 entry->param0);
236 __hostap_cmd_queue_free(local, entry, 1);
237 }
238 if (local->cmd_queue_len) {
239 /* This should not happen; print debug message and clear
240 * queue length. */
241 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
242 "flush\n", local->dev->name, local->cmd_queue_len);
243 local->cmd_queue_len = 0;
244 }
245 spin_unlock_irqrestore(&local->cmdlock, flags);
246}
247
248
249/**
250 * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
251 * @dev: pointer to net_device
252 * @entry: Prism2 command queue entry to be issued
253 */
254static int hfa384x_cmd_issue(struct net_device *dev,
255 struct hostap_cmd_queue *entry)
256{
257 struct hostap_interface *iface;
258 local_info_t *local;
259 int tries;
260 u16 reg;
261 unsigned long flags;
262
263 iface = netdev_priv(dev);
264 local = iface->local;
265
266 if (local->func->card_present && !local->func->card_present(local))
267 return -ENODEV;
268
269 if (entry->issued) {
270 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
271 dev->name, entry);
272 }
273
274 /* wait until busy bit is clear; this should always be clear since the
275 * commands are serialized */
276 tries = HFA384X_CMD_BUSY_TIMEOUT;
277 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
278 tries--;
279 udelay(1);
280 }
281#ifndef final_version
282 if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
283 prism2_io_debug_error(dev, 1);
284 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
285 "for %d usec\n", dev->name,
286 HFA384X_CMD_BUSY_TIMEOUT - tries);
287 }
288#endif
289 if (tries == 0) {
290 reg = HFA384X_INW(HFA384X_CMD_OFF);
291 prism2_io_debug_error(dev, 2);
292 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
293 "reg=0x%04x\n", dev->name, reg);
294 return -ETIMEDOUT;
295 }
296
297 /* write command */
298 spin_lock_irqsave(&local->cmdlock, flags);
299 HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
300 HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
301 HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
302 entry->issued = 1;
303 spin_unlock_irqrestore(&local->cmdlock, flags);
304
305 return 0;
306}
307
308
309/**
310 * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
311 * @dev: pointer to net_device
312 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
313 * @param0: value for Param0 register
314 * @param1: value for Param1 register (pointer; %NULL if not used)
315 * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
316 *
317 * Issue given command (possibly after waiting in command queue) and sleep
318 * until the command is completed (or timed out or interrupted). This can be
319 * called only from user process context.
320 */
321static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
322 u16 *param1, u16 *resp0)
323{
324 struct hostap_interface *iface;
325 local_info_t *local;
326 int err, res, issue, issued = 0;
327 unsigned long flags;
328 struct hostap_cmd_queue *entry;
329 DECLARE_WAITQUEUE(wait, current);
330
331 iface = netdev_priv(dev);
332 local = iface->local;
333
334 if (in_interrupt()) {
335 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
336 "context\n", dev->name);
337 return -1;
338 }
339
340 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
341 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
342 dev->name);
343 return -1;
344 }
345
346 if (signal_pending(current))
347 return -EINTR;
348
349 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
350 if (entry == NULL)
351 return -ENOMEM;
352
353 atomic_set(&entry->usecnt, 1);
354 entry->type = CMD_SLEEP;
355 entry->cmd = cmd;
356 entry->param0 = param0;
357 if (param1)
358 entry->param1 = *param1;
359 init_waitqueue_head(&entry->compl);
360
361 /* prepare to wait for command completion event, but do not sleep yet
362 */
363 add_wait_queue(&entry->compl, &wait);
364 set_current_state(TASK_INTERRUPTIBLE);
365
366 spin_lock_irqsave(&local->cmdlock, flags);
367 issue = list_empty(&local->cmd_queue);
368 if (issue)
369 entry->issuing = 1;
370 list_add_tail(&entry->list, &local->cmd_queue);
371 local->cmd_queue_len++;
372 spin_unlock_irqrestore(&local->cmdlock, flags);
373
374 err = 0;
375 if (!issue)
376 goto wait_completion;
377
378 if (signal_pending(current))
379 err = -EINTR;
380
381 if (!err) {
382 if (hfa384x_cmd_issue(dev, entry))
383 err = -ETIMEDOUT;
384 else
385 issued = 1;
386 }
387
388 wait_completion:
389 if (!err && entry->type != CMD_COMPLETED) {
390 /* sleep until command is completed or timed out */
391 res = schedule_timeout(2 * HZ);
392 } else
393 res = -1;
394
395 if (!err && signal_pending(current))
396 err = -EINTR;
397
398 if (err && issued) {
399 /* the command was issued, so a CmdCompl event should occur
400 * soon; however, there's a pending signal and
401 * schedule_timeout() would be interrupted; wait a short period
402 * of time to avoid removing entry from the list before
403 * CmdCompl event */
404 udelay(300);
405 }
406
407 set_current_state(TASK_RUNNING);
408 remove_wait_queue(&entry->compl, &wait);
409
410 /* If entry->list is still in the list, it must be removed
411 * first and in this case prism2_cmd_ev() does not yet have
412 * local reference to it, and the data can be kfree()'d
413 * here. If the command completion event is still generated,
414 * it will be assigned to next (possibly) pending command, but
415 * the driver will reset the card anyway due to timeout
416 *
417 * If the entry is not in the list prism2_cmd_ev() has a local
418 * reference to it, but keeps cmdlock as long as the data is
419 * needed, so the data can be kfree()'d here. */
420
421 /* FIX: if the entry->list is in the list, it has not been completed
422 * yet, so removing it here is somewhat wrong.. this could cause
423 * references to freed memory and next list_del() causing NULL pointer
424 * dereference.. it would probably be better to leave the entry in the
425 * list and the list should be emptied during hw reset */
426
427 spin_lock_irqsave(&local->cmdlock, flags);
428 if (!list_empty(&entry->list)) {
429 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
430 "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
431 entry->type, res);
432 list_del_init(&entry->list);
433 local->cmd_queue_len--;
434 }
435 spin_unlock_irqrestore(&local->cmdlock, flags);
436
437 if (err) {
438 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
439 dev->name, err);
440 res = err;
441 goto done;
442 }
443
444 if (entry->type != CMD_COMPLETED) {
445 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
446 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
447 "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
448 "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
449 res, entry, entry->type, entry->cmd, entry->param0, reg,
450 HFA384X_INW(HFA384X_INTEN_OFF));
451 if (reg & HFA384X_EV_CMD) {
452 /* Command completion event is pending, but the
453 * interrupt was not delivered - probably an issue
454 * with pcmcia-cs configuration. */
455 printk(KERN_WARNING "%s: interrupt delivery does not "
456 "seem to work\n", dev->name);
457 }
458 prism2_io_debug_error(dev, 3);
459 res = -ETIMEDOUT;
460 goto done;
461 }
462
463 if (resp0 != NULL)
464 *resp0 = entry->resp0;
465#ifndef final_version
466 if (entry->res) {
467 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
468 "resp0=0x%04x\n",
469 dev->name, cmd, entry->res, entry->resp0);
470 }
471#endif /* final_version */
472
473 res = entry->res;
474 done:
475 hostap_cmd_queue_free(local, entry, 1);
476 return res;
477}
478
479
480/**
481 * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
482 * @dev: pointer to net_device
483 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
484 * @param0: value for Param0 register
485 * @callback: command completion callback function (%NULL = no callback)
486 * @context: context data to be given to the callback function
487 *
488 * Issue given command (possibly after waiting in command queue) and use
489 * callback function to indicate command completion. This can be called both
490 * from user and interrupt context. The callback function will be called in
491 * hardware IRQ context. It can be %NULL, when no function is called when
492 * command is completed.
493 */
494static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
495 void (*callback)(struct net_device *dev,
496 long context, u16 resp0,
497 u16 status),
498 long context)
499{
500 struct hostap_interface *iface;
501 local_info_t *local;
502 int issue, ret;
503 unsigned long flags;
504 struct hostap_cmd_queue *entry;
505
506 iface = netdev_priv(dev);
507 local = iface->local;
508
509 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
510 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
511 dev->name);
512 return -1;
513 }
514
515 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
516 if (entry == NULL)
517 return -ENOMEM;
518
519 atomic_set(&entry->usecnt, 1);
520 entry->type = CMD_CALLBACK;
521 entry->cmd = cmd;
522 entry->param0 = param0;
523 entry->callback = callback;
524 entry->context = context;
525
526 spin_lock_irqsave(&local->cmdlock, flags);
527 issue = list_empty(&local->cmd_queue);
528 if (issue)
529 entry->issuing = 1;
530 list_add_tail(&entry->list, &local->cmd_queue);
531 local->cmd_queue_len++;
532 spin_unlock_irqrestore(&local->cmdlock, flags);
533
534 if (issue && hfa384x_cmd_issue(dev, entry))
535 ret = -ETIMEDOUT;
536 else
537 ret = 0;
538
539 hostap_cmd_queue_free(local, entry, ret);
540
541 return ret;
542}
543
544
545/**
546 * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
547 * @dev: pointer to net_device
548 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
549 * @param0: value for Param0 register
550 * @io_debug_num: I/O debug error number
551 *
552 * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
553 */
554static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
555 int io_debug_num)
556{
557 int tries;
558 u16 reg;
559
560 /* wait until busy bit is clear; this should always be clear since the
561 * commands are serialized */
562 tries = HFA384X_CMD_BUSY_TIMEOUT;
563 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
564 tries--;
565 udelay(1);
566 }
567 if (tries == 0) {
568 reg = HFA384X_INW(HFA384X_CMD_OFF);
569 prism2_io_debug_error(dev, io_debug_num);
570 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
571 "reg=0x%04x\n", dev->name, io_debug_num, reg);
572 return -ETIMEDOUT;
573 }
574
575 /* write command */
576 HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
577 HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
578
579 return 0;
580}
581
582
583/**
584 * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
585 * @dev: pointer to net_device
586 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
587 * @param0: value for Param0 register
588 */
589static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
590{
591 int res, tries;
592 u16 reg;
593
594 res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
595 if (res)
596 return res;
597
598 /* wait for command completion */
599 if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
600 tries = HFA384X_DL_COMPL_TIMEOUT;
601 else
602 tries = HFA384X_CMD_COMPL_TIMEOUT;
603
604 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
605 tries > 0) {
606 tries--;
607 udelay(10);
608 }
609 if (tries == 0) {
610 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
611 prism2_io_debug_error(dev, 5);
612 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
613 "reg=0x%04x\n", dev->name, reg);
614 return -ETIMEDOUT;
615 }
616
617 res = (HFA384X_INW(HFA384X_STATUS_OFF) &
618 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
619 BIT(8))) >> 8;
620#ifndef final_version
621 if (res) {
622 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
623 dev->name, cmd, res);
624 }
625#endif
626
627 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
628
629 return res;
630}
631
632
633/**
634 * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
635 * @dev: pointer to net_device
636 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
637 * @param0: value for Param0 register
638 */
639static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
640 u16 param0)
641{
642 return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
643}
644
645
646/**
647 * prism2_cmd_ev - Prism2 command completion event handler
648 * @dev: pointer to net_device
649 *
650 * Interrupt handler for command completion events. Called by the main
651 * interrupt handler in hardware IRQ context. Read Resp0 and status registers
652 * from the hardware and ACK the event. Depending on the issued command type
653 * either wake up the sleeping process that is waiting for command completion
654 * or call the callback function. Issue the next command, if one is pending.
655 */
656static void prism2_cmd_ev(struct net_device *dev)
657{
658 struct hostap_interface *iface;
659 local_info_t *local;
660 struct hostap_cmd_queue *entry = NULL;
661
662 iface = netdev_priv(dev);
663 local = iface->local;
664
665 spin_lock(&local->cmdlock);
666 if (!list_empty(&local->cmd_queue)) {
667 entry = list_entry(local->cmd_queue.next,
668 struct hostap_cmd_queue, list);
669 atomic_inc(&entry->usecnt);
670 list_del_init(&entry->list);
671 local->cmd_queue_len--;
672
673 if (!entry->issued) {
674 printk(KERN_DEBUG "%s: Command completion event, but "
675 "cmd not issued\n", dev->name);
676 __hostap_cmd_queue_free(local, entry, 1);
677 entry = NULL;
678 }
679 }
680 spin_unlock(&local->cmdlock);
681
682 if (!entry) {
683 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
684 printk(KERN_DEBUG "%s: Command completion event, but no "
685 "pending commands\n", dev->name);
686 return;
687 }
688
689 entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
690 entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
691 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
692 BIT(9) | BIT(8))) >> 8;
693 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
694
695 /* TODO: rest of the CmdEv handling could be moved to tasklet */
696 if (entry->type == CMD_SLEEP) {
697 entry->type = CMD_COMPLETED;
698 wake_up_interruptible(&entry->compl);
699 } else if (entry->type == CMD_CALLBACK) {
700 if (entry->callback)
701 entry->callback(dev, entry->context, entry->resp0,
702 entry->res);
703 } else {
704 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
705 dev->name, entry->type);
706 }
707 hostap_cmd_queue_free(local, entry, 1);
708
709 /* issue next command, if pending */
710 entry = NULL;
711 spin_lock(&local->cmdlock);
712 if (!list_empty(&local->cmd_queue)) {
713 entry = list_entry(local->cmd_queue.next,
714 struct hostap_cmd_queue, list);
715 if (entry->issuing) {
716 /* hfa384x_cmd() has already started issuing this
717 * command, so do not start here */
718 entry = NULL;
719 }
720 if (entry)
721 atomic_inc(&entry->usecnt);
722 }
723 spin_unlock(&local->cmdlock);
724
725 if (entry) {
726 /* issue next command; if command issuing fails, remove the
727 * entry from cmd_queue */
728 int res = hfa384x_cmd_issue(dev, entry);
729 spin_lock(&local->cmdlock);
730 __hostap_cmd_queue_free(local, entry, res);
731 spin_unlock(&local->cmdlock);
732 }
733}
734
735
736static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
737{
738 int tries = HFA384X_BAP_BUSY_TIMEOUT;
739 int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
740
741 while (res && tries > 0) {
742 tries--;
743 udelay(1);
744 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
745 }
746 return res;
747}
748
749
750/* Offset must be even */
751static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
752 int offset)
753{
754 u16 o_off, s_off;
755 int ret = 0;
756
757 if (offset % 2 || bap > 1)
758 return -EINVAL;
759
760 if (bap == BAP1) {
761 o_off = HFA384X_OFFSET1_OFF;
762 s_off = HFA384X_SELECT1_OFF;
763 } else {
764 o_off = HFA384X_OFFSET0_OFF;
765 s_off = HFA384X_SELECT0_OFF;
766 }
767
768 if (hfa384x_wait_offset(dev, o_off)) {
769 prism2_io_debug_error(dev, 7);
770 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
771 dev->name);
772 ret = -ETIMEDOUT;
773 goto out;
774 }
775
776 HFA384X_OUTW(id, s_off);
777 HFA384X_OUTW(offset, o_off);
778
779 if (hfa384x_wait_offset(dev, o_off)) {
780 prism2_io_debug_error(dev, 8);
781 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
782 dev->name);
783 ret = -ETIMEDOUT;
784 goto out;
785 }
786#ifndef final_version
787 if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
788 prism2_io_debug_error(dev, 9);
789 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
790 "(%d,0x04%x,%d); reg=0x%04x\n",
791 dev->name, bap, id, offset, HFA384X_INW(o_off));
792 ret = -EINVAL;
793 }
794#endif
795
796 out:
797 return ret;
798}
799
800
801static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
802 int exact_len)
803{
804 struct hostap_interface *iface;
805 local_info_t *local;
806 int res, rlen = 0;
807 struct hfa384x_rid_hdr rec;
808
809 iface = netdev_priv(dev);
810 local = iface->local;
811
812 if (local->no_pri) {
813 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
814 "f/w\n", dev->name, rid, len);
815 return -ENOTTY; /* Well.. not really correct, but return
816 * something unique enough.. */
817 }
818
819 if ((local->func->card_present && !local->func->card_present(local)) ||
820 local->hw_downloading)
821 return -ENODEV;
822
823 res = mutex_lock_interruptible(&local->rid_bap_mtx);
824 if (res)
825 return res;
826
827 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
828 if (res) {
829 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
830 "(res=%d, rid=%04x, len=%d)\n",
831 dev->name, res, rid, len);
832 mutex_unlock(&local->rid_bap_mtx);
833 return res;
834 }
835
836 spin_lock_bh(&local->baplock);
837
838 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
839 if (!res)
840 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
841
842 if (le16_to_cpu(rec.len) == 0) {
843 /* RID not available */
844 res = -ENODATA;
845 }
846
847 rlen = (le16_to_cpu(rec.len) - 1) * 2;
848 if (!res && exact_len && rlen != len) {
849 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
850 "rid=0x%04x, len=%d (expected %d)\n",
851 dev->name, rid, rlen, len);
852 res = -ENODATA;
853 }
854
855 if (!res)
856 res = hfa384x_from_bap(dev, BAP0, buf, len);
857
858 spin_unlock_bh(&local->baplock);
859 mutex_unlock(&local->rid_bap_mtx);
860
861 if (res) {
862 if (res != -ENODATA)
863 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
864 "len=%d) - failed - res=%d\n", dev->name, rid,
865 len, res);
866 if (res == -ETIMEDOUT)
867 prism2_hw_reset(dev);
868 return res;
869 }
870
871 return rlen;
872}
873
874
875static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
876{
877 struct hostap_interface *iface;
878 local_info_t *local;
879 struct hfa384x_rid_hdr rec;
880 int res;
881
882 iface = netdev_priv(dev);
883 local = iface->local;
884
885 if (local->no_pri) {
886 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
887 "f/w\n", dev->name, rid, len);
888 return -ENOTTY; /* Well.. not really correct, but return
889 * something unique enough.. */
890 }
891
892 if ((local->func->card_present && !local->func->card_present(local)) ||
893 local->hw_downloading)
894 return -ENODEV;
895
896 rec.rid = cpu_to_le16(rid);
897 /* RID len in words and +1 for rec.rid */
898 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
899
900 res = mutex_lock_interruptible(&local->rid_bap_mtx);
901 if (res)
902 return res;
903
904 spin_lock_bh(&local->baplock);
905 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
906 if (!res)
907 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
908 if (!res)
909 res = hfa384x_to_bap(dev, BAP0, buf, len);
910 spin_unlock_bh(&local->baplock);
911
912 if (res) {
913 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
914 "failed - res=%d\n", dev->name, rid, len, res);
915 mutex_unlock(&local->rid_bap_mtx);
916 return res;
917 }
918
919 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
920 mutex_unlock(&local->rid_bap_mtx);
921
922 if (res) {
923 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
924 "failed (res=%d, rid=%04x, len=%d)\n",
925 dev->name, res, rid, len);
926
927 if (res == -ETIMEDOUT)
928 prism2_hw_reset(dev);
929 }
930
931 return res;
932}
933
934
935static void hfa384x_disable_interrupts(struct net_device *dev)
936{
937 /* disable interrupts and clear event status */
938 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
939 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
940}
941
942
943static void hfa384x_enable_interrupts(struct net_device *dev)
944{
945 /* ack pending events and enable interrupts from selected events */
946 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
947 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
948}
949
950
951static void hfa384x_events_no_bap0(struct net_device *dev)
952{
953 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
954 HFA384X_INTEN_OFF);
955}
956
957
958static void hfa384x_events_all(struct net_device *dev)
959{
960 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
961}
962
963
964static void hfa384x_events_only_cmd(struct net_device *dev)
965{
966 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
967}
968
969
970static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
971{
972 u16 fid;
973 unsigned long delay;
974
975 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
976 * below would be handled like CmdCompl event (sleep here, wake up from
977 * interrupt handler */
978 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
979 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
980 dev->name, len);
981 return 0xffff;
982 }
983
984 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
985 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
986 time_before(jiffies, delay))
987 yield();
988 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
989 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
990 return 0xffff;
991 }
992
993 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
994 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
995
996 return fid;
997}
998
999
1000static int prism2_reset_port(struct net_device *dev)
1001{
1002 struct hostap_interface *iface;
1003 local_info_t *local;
1004 int res;
1005
1006 iface = netdev_priv(dev);
1007 local = iface->local;
1008
1009 if (!local->dev_enabled)
1010 return 0;
1011
1012 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1013 NULL, NULL);
1014 if (res)
1015 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1016 dev->name);
1017 else {
1018 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1019 NULL, NULL);
1020 if (res)
1021 printk(KERN_DEBUG "%s: reset port failed to enable "
1022 "port\n", dev->name);
1023 }
1024
1025 /* It looks like at least some STA firmware versions reset
1026 * fragmentation threshold back to 2346 after enable command. Restore
1027 * the configured value, if it differs from this default. */
1028 if (local->fragm_threshold != 2346 &&
1029 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1030 local->fragm_threshold)) {
1031 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1032 "threshold (%d) after Port0 enable\n",
1033 dev->name, local->fragm_threshold);
1034 }
1035
1036 /* Some firmwares lose antenna selection settings on reset */
1037 (void) hostap_set_antsel(local);
1038
1039 return res;
1040}
1041
1042
1043static int prism2_get_version_info(struct net_device *dev, u16 rid,
1044 const char *txt)
1045{
1046 struct hfa384x_comp_ident comp;
1047 struct hostap_interface *iface;
1048 local_info_t *local;
1049
1050 iface = netdev_priv(dev);
1051 local = iface->local;
1052
1053 if (local->no_pri) {
1054 /* PRI f/w not yet available - cannot read RIDs */
1055 return -1;
1056 }
1057 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1058 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1059 return -1;
1060 }
1061
1062 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1063 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1064 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1065 return 0;
1066}
1067
1068
1069static int prism2_setup_rids(struct net_device *dev)
1070{
1071 struct hostap_interface *iface;
1072 local_info_t *local;
1073 __le16 tmp;
1074 int ret = 0;
1075
1076 iface = netdev_priv(dev);
1077 local = iface->local;
1078
1079 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1080
1081 if (!local->fw_ap) {
1082 u16 tmp1 = hostap_get_porttype(local);
1083 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1084 if (ret) {
1085 printk("%s: Port type setting to %d failed\n",
1086 dev->name, tmp1);
1087 goto fail;
1088 }
1089 }
1090
1091 /* Setting SSID to empty string seems to kill the card in Host AP mode
1092 */
1093 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1094 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1095 local->essid);
1096 if (ret) {
1097 printk("%s: AP own SSID setting failed\n", dev->name);
1098 goto fail;
1099 }
1100 }
1101
1102 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1103 PRISM2_DATA_MAXLEN);
1104 if (ret) {
1105 printk("%s: MAC data length setting to %d failed\n",
1106 dev->name, PRISM2_DATA_MAXLEN);
1107 goto fail;
1108 }
1109
1110 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1111 printk("%s: Channel list read failed\n", dev->name);
1112 ret = -EINVAL;
1113 goto fail;
1114 }
1115 local->channel_mask = le16_to_cpu(tmp);
1116
1117 if (local->channel < 1 || local->channel > 14 ||
1118 !(local->channel_mask & (1 << (local->channel - 1)))) {
1119 printk(KERN_WARNING "%s: Channel setting out of range "
1120 "(%d)!\n", dev->name, local->channel);
1121 ret = -EBUSY;
1122 goto fail;
1123 }
1124
1125 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1126 if (ret) {
1127 printk("%s: Channel setting to %d failed\n",
1128 dev->name, local->channel);
1129 goto fail;
1130 }
1131
1132 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1133 local->beacon_int);
1134 if (ret) {
1135 printk("%s: Beacon interval setting to %d failed\n",
1136 dev->name, local->beacon_int);
1137 /* this may fail with Symbol/Lucent firmware */
1138 if (ret == -ETIMEDOUT)
1139 goto fail;
1140 }
1141
1142 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1143 local->dtim_period);
1144 if (ret) {
1145 printk("%s: DTIM period setting to %d failed\n",
1146 dev->name, local->dtim_period);
1147 /* this may fail with Symbol/Lucent firmware */
1148 if (ret == -ETIMEDOUT)
1149 goto fail;
1150 }
1151
1152 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1153 local->is_promisc);
1154 if (ret)
1155 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1156 dev->name, local->is_promisc);
1157
1158 if (!local->fw_ap) {
1159 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1160 local->essid);
1161 if (ret) {
1162 printk("%s: Desired SSID setting failed\n", dev->name);
1163 goto fail;
1164 }
1165 }
1166
1167 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1168 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1169 * rates */
1170 if (local->tx_rate_control == 0) {
1171 local->tx_rate_control =
1172 HFA384X_RATES_1MBPS |
1173 HFA384X_RATES_2MBPS |
1174 HFA384X_RATES_5MBPS |
1175 HFA384X_RATES_11MBPS;
1176 }
1177 if (local->basic_rates == 0)
1178 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1179
1180 if (!local->fw_ap) {
1181 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1182 local->tx_rate_control);
1183 if (ret) {
1184 printk("%s: TXRateControl setting to %d failed\n",
1185 dev->name, local->tx_rate_control);
1186 goto fail;
1187 }
1188
1189 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1190 local->tx_rate_control);
1191 if (ret) {
1192 printk("%s: cnfSupportedRates setting to %d failed\n",
1193 dev->name, local->tx_rate_control);
1194 }
1195
1196 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1197 local->basic_rates);
1198 if (ret) {
1199 printk("%s: cnfBasicRates setting to %d failed\n",
1200 dev->name, local->basic_rates);
1201 }
1202
1203 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1204 if (ret) {
1205 printk("%s: Create IBSS setting to 1 failed\n",
1206 dev->name);
1207 }
1208 }
1209
1210 if (local->name_set)
1211 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1212 local->name);
1213
1214 if (hostap_set_encryption(local)) {
1215 printk(KERN_INFO "%s: could not configure encryption\n",
1216 dev->name);
1217 }
1218
1219 (void) hostap_set_antsel(local);
1220
1221 if (hostap_set_roaming(local)) {
1222 printk(KERN_INFO "%s: could not set host roaming\n",
1223 dev->name);
1224 }
1225
1226 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1227 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1228 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1229 dev->name, local->enh_sec);
1230
1231 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1232 * not working correctly (last seven counters report bogus values).
1233 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1234 * beginning with that firmware version. Another bug fix for 32-bit
1235 * tallies in 1.4.0; should 16-bit tallies be used for some other
1236 * versions, too? */
1237 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1238 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1239 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1240 "failed\n", dev->name);
1241 local->tallies32 = 0;
1242 } else
1243 local->tallies32 = 1;
1244 } else
1245 local->tallies32 = 0;
1246
1247 hostap_set_auth_algs(local);
1248
1249 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1250 local->fragm_threshold)) {
1251 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1252 "failed\n", dev->name, local->fragm_threshold);
1253 }
1254
1255 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1256 local->rts_threshold)) {
1257 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1258 dev->name, local->rts_threshold);
1259 }
1260
1261 if (local->manual_retry_count >= 0 &&
1262 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1263 local->manual_retry_count)) {
1264 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1265 dev->name, local->manual_retry_count);
1266 }
1267
1268 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1269 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1270 local->rssi_to_dBm = le16_to_cpu(tmp);
1271 }
1272
1273 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1274 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1275 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1276 dev->name);
1277 }
1278
1279 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1280 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1281 local->generic_elem, local->generic_elem_len)) {
1282 printk(KERN_INFO "%s: setting genericElement failed\n",
1283 dev->name);
1284 }
1285
1286 fail:
1287 return ret;
1288}
1289
1290
1291static int prism2_hw_init(struct net_device *dev, int initial)
1292{
1293 struct hostap_interface *iface;
1294 local_info_t *local;
1295 int ret, first = 1;
1296 unsigned long start, delay;
1297
1298 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1299
1300 iface = netdev_priv(dev);
1301 local = iface->local;
1302
1303 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1304
1305 init:
1306 /* initialize HFA 384x */
1307 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1308 if (ret) {
1309 printk(KERN_INFO "%s: first command failed - assuming card "
1310 "does not have primary firmware\n", dev_info);
1311 }
1312
1313 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1314 /* EvStat has Cmd bit set in some cases, so retry once if no
1315 * wait was needed */
1316 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1317 printk(KERN_DEBUG "%s: init command completed too quickly - "
1318 "retrying\n", dev->name);
1319 first = 0;
1320 goto init;
1321 }
1322
1323 start = jiffies;
1324 delay = jiffies + HFA384X_INIT_TIMEOUT;
1325 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1326 time_before(jiffies, delay))
1327 yield();
1328 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1329 printk(KERN_DEBUG "%s: assuming no Primary image in "
1330 "flash - card initialization not completed\n",
1331 dev_info);
1332 local->no_pri = 1;
1333#ifdef PRISM2_DOWNLOAD_SUPPORT
1334 if (local->sram_type == -1)
1335 local->sram_type = prism2_get_ram_size(local);
1336#endif /* PRISM2_DOWNLOAD_SUPPORT */
1337 return 1;
1338 }
1339 local->no_pri = 0;
1340 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1341 (jiffies - start) * 1000 / HZ);
1342 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1343 return 0;
1344}
1345
1346
1347static int prism2_hw_init2(struct net_device *dev, int initial)
1348{
1349 struct hostap_interface *iface;
1350 local_info_t *local;
1351 int i;
1352
1353 iface = netdev_priv(dev);
1354 local = iface->local;
1355
1356#ifdef PRISM2_DOWNLOAD_SUPPORT
1357 kfree(local->pda);
1358 if (local->no_pri)
1359 local->pda = NULL;
1360 else
1361 local->pda = prism2_read_pda(dev);
1362#endif /* PRISM2_DOWNLOAD_SUPPORT */
1363
1364 hfa384x_disable_interrupts(dev);
1365
1366#ifndef final_version
1367 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1368 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1369 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1370 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1371 goto failed;
1372 }
1373#endif
1374
1375 if (initial || local->pri_only) {
1376 hfa384x_events_only_cmd(dev);
1377 /* get card version information */
1378 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1379 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1380 hfa384x_disable_interrupts(dev);
1381 goto failed;
1382 }
1383
1384 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1385 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1386 "- only Primary f/w present\n", dev->name);
1387 local->pri_only = 1;
1388 return 0;
1389 }
1390 local->pri_only = 0;
1391 hfa384x_disable_interrupts(dev);
1392 }
1393
1394 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1395 * enable interrupts before this. This would also require some sort of
1396 * sleeping AllocEv waiting */
1397
1398 /* allocate TX FIDs */
1399 local->txfid_len = PRISM2_TXFID_LEN;
1400 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1401 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1402 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1403 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1404 if (local->txfid[i] != 0xffff) {
1405 printk(KERN_DEBUG "%s: Using shorter TX FID "
1406 "(1600 bytes)\n", dev->name);
1407 local->txfid_len = 1600;
1408 }
1409 }
1410 if (local->txfid[i] == 0xffff)
1411 goto failed;
1412 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1413 }
1414
1415 hfa384x_events_only_cmd(dev);
1416
1417 if (initial) {
1418 struct list_head *ptr;
1419 prism2_check_sta_fw_version(local);
1420
1421 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1422 dev->dev_addr, 6, 1) < 0) {
1423 printk("%s: could not get own MAC address\n",
1424 dev->name);
1425 }
1426 list_for_each(ptr, &local->hostap_interfaces) {
1427 iface = list_entry(ptr, struct hostap_interface, list);
1428 memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1429 }
1430 } else if (local->fw_ap)
1431 prism2_check_sta_fw_version(local);
1432
1433 prism2_setup_rids(dev);
1434
1435 /* MAC is now configured, but port 0 is not yet enabled */
1436 return 0;
1437
1438 failed:
1439 if (!local->no_pri)
1440 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1441 return 1;
1442}
1443
1444
1445static int prism2_hw_enable(struct net_device *dev, int initial)
1446{
1447 struct hostap_interface *iface;
1448 local_info_t *local;
1449 int was_resetting;
1450
1451 iface = netdev_priv(dev);
1452 local = iface->local;
1453 was_resetting = local->hw_resetting;
1454
1455 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1456 printk("%s: MAC port 0 enabling failed\n", dev->name);
1457 return 1;
1458 }
1459
1460 local->hw_ready = 1;
1461 local->hw_reset_tries = 0;
1462 local->hw_resetting = 0;
1463 hfa384x_enable_interrupts(dev);
1464
1465 /* at least D-Link DWL-650 seems to require additional port reset
1466 * before it starts acting as an AP, so reset port automatically
1467 * here just in case */
1468 if (initial && prism2_reset_port(dev)) {
1469 printk("%s: MAC port 0 resetting failed\n", dev->name);
1470 return 1;
1471 }
1472
1473 if (was_resetting && netif_queue_stopped(dev)) {
1474 /* If hw_reset() was called during pending transmit, netif
1475 * queue was stopped. Wake it up now since the wlan card has
1476 * been resetted. */
1477 netif_wake_queue(dev);
1478 }
1479
1480 return 0;
1481}
1482
1483
1484static int prism2_hw_config(struct net_device *dev, int initial)
1485{
1486 struct hostap_interface *iface;
1487 local_info_t *local;
1488
1489 iface = netdev_priv(dev);
1490 local = iface->local;
1491
1492 if (local->hw_downloading)
1493 return 1;
1494
1495 if (prism2_hw_init(dev, initial)) {
1496 return local->no_pri ? 0 : 1;
1497 }
1498
1499 if (prism2_hw_init2(dev, initial))
1500 return 1;
1501
1502 /* Enable firmware if secondary image is loaded and at least one of the
1503 * netdevices is up. */
1504 if (!local->pri_only &&
1505 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1506 if (!local->dev_enabled)
1507 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1508 local->dev_enabled = 1;
1509 return prism2_hw_enable(dev, initial);
1510 }
1511
1512 return 0;
1513}
1514
1515
1516static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1517{
1518 struct hostap_interface *iface;
1519 local_info_t *local;
1520
1521 iface = netdev_priv(dev);
1522 local = iface->local;
1523
1524 /* Allow only command completion events during disable */
1525 hfa384x_events_only_cmd(dev);
1526
1527 local->hw_ready = 0;
1528 if (local->dev_enabled)
1529 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1530 local->dev_enabled = 0;
1531
1532 if (local->func->card_present && !local->func->card_present(local)) {
1533 printk(KERN_DEBUG "%s: card already removed or not configured "
1534 "during shutdown\n", dev->name);
1535 return;
1536 }
1537
1538 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1539 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1540 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1541
1542 hfa384x_disable_interrupts(dev);
1543
1544 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1545 hfa384x_events_only_cmd(dev);
1546 else
1547 prism2_clear_cmd_queue(local);
1548}
1549
1550
1551static void prism2_hw_reset(struct net_device *dev)
1552{
1553 struct hostap_interface *iface;
1554 local_info_t *local;
1555
1556#if 0
1557 static long last_reset = 0;
1558
1559 /* do not reset card more than once per second to avoid ending up in a
1560 * busy loop resetting the card */
1561 if (time_before_eq(jiffies, last_reset + HZ))
1562 return;
1563 last_reset = jiffies;
1564#endif
1565
1566 iface = netdev_priv(dev);
1567 local = iface->local;
1568
1569 if (in_interrupt()) {
1570 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1571 "in interrupt context\n", dev->name);
1572 return;
1573 }
1574
1575 if (local->hw_downloading)
1576 return;
1577
1578 if (local->hw_resetting) {
1579 printk(KERN_WARNING "%s: %s: already resetting card - "
1580 "ignoring reset request\n", dev_info, dev->name);
1581 return;
1582 }
1583
1584 local->hw_reset_tries++;
1585 if (local->hw_reset_tries > 10) {
1586 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1587 dev->name);
1588 return;
1589 }
1590
1591 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1592 hfa384x_disable_interrupts(dev);
1593 local->hw_resetting = 1;
1594 if (local->func->cor_sreset) {
1595 /* Host system seems to hang in some cases with high traffic
1596 * load or shared interrupts during COR sreset. Disable shared
1597 * interrupts during reset to avoid these crashes. COS sreset
1598 * takes quite a long time, so it is unfortunate that this
1599 * seems to be needed. Anyway, I do not know of any better way
1600 * of avoiding the crash. */
1601 disable_irq(dev->irq);
1602 local->func->cor_sreset(local);
1603 enable_irq(dev->irq);
1604 }
1605 prism2_hw_shutdown(dev, 1);
1606 prism2_hw_config(dev, 0);
1607 local->hw_resetting = 0;
1608
1609#ifdef PRISM2_DOWNLOAD_SUPPORT
1610 if (local->dl_pri) {
1611 printk(KERN_DEBUG "%s: persistent download of primary "
1612 "firmware\n", dev->name);
1613 if (prism2_download_genesis(local, local->dl_pri) < 0)
1614 printk(KERN_WARNING "%s: download (PRI) failed\n",
1615 dev->name);
1616 }
1617
1618 if (local->dl_sec) {
1619 printk(KERN_DEBUG "%s: persistent download of secondary "
1620 "firmware\n", dev->name);
1621 if (prism2_download_volatile(local, local->dl_sec) < 0)
1622 printk(KERN_WARNING "%s: download (SEC) failed\n",
1623 dev->name);
1624 }
1625#endif /* PRISM2_DOWNLOAD_SUPPORT */
1626
1627 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1628}
1629
1630
1631static void prism2_schedule_reset(local_info_t *local)
1632{
1633 schedule_work(&local->reset_queue);
1634}
1635
1636
1637/* Called only as scheduled task after noticing card timeout in interrupt
1638 * context */
1639static void handle_reset_queue(struct work_struct *work)
1640{
1641 local_info_t *local = container_of(work, local_info_t, reset_queue);
1642
1643 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1644 prism2_hw_reset(local->dev);
1645
1646 if (netif_queue_stopped(local->dev)) {
1647 int i;
1648
1649 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1650 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1651 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1652 "wake up queue\n");
1653 netif_wake_queue(local->dev);
1654 break;
1655 }
1656 }
1657}
1658
1659
1660static int prism2_get_txfid_idx(local_info_t *local)
1661{
1662 int idx, end;
1663 unsigned long flags;
1664
1665 spin_lock_irqsave(&local->txfidlock, flags);
1666 end = idx = local->next_txfid;
1667 do {
1668 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1669 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1670 spin_unlock_irqrestore(&local->txfidlock, flags);
1671 return idx;
1672 }
1673 idx++;
1674 if (idx >= PRISM2_TXFID_COUNT)
1675 idx = 0;
1676 } while (idx != end);
1677 spin_unlock_irqrestore(&local->txfidlock, flags);
1678
1679 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1680 "packet dropped\n");
1681 local->dev->stats.tx_dropped++;
1682
1683 return -1;
1684}
1685
1686
1687/* Called only from hardware IRQ */
1688static void prism2_transmit_cb(struct net_device *dev, long context,
1689 u16 resp0, u16 res)
1690{
1691 struct hostap_interface *iface;
1692 local_info_t *local;
1693 int idx = (int) context;
1694
1695 iface = netdev_priv(dev);
1696 local = iface->local;
1697
1698 if (res) {
1699 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1700 dev->name, res);
1701 return;
1702 }
1703
1704 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1705 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1706 "idx=%d\n", dev->name, idx);
1707 return;
1708 }
1709
1710 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1711 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1712 "with no pending transmit\n", dev->name);
1713 }
1714
1715 if (netif_queue_stopped(dev)) {
1716 /* ready for next TX, so wake up queue that was stopped in
1717 * prism2_transmit() */
1718 netif_wake_queue(dev);
1719 }
1720
1721 spin_lock(&local->txfidlock);
1722
1723 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1724 * will be automatically allocated for the next TX frame */
1725 local->intransmitfid[idx] = resp0;
1726
1727 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1728 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1729 dev->name, idx, local->txfid[idx],
1730 resp0, local->intransmitfid[local->next_txfid]);
1731
1732 idx++;
1733 if (idx >= PRISM2_TXFID_COUNT)
1734 idx = 0;
1735 local->next_txfid = idx;
1736
1737 /* check if all TX buffers are occupied */
1738 do {
1739 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1740 spin_unlock(&local->txfidlock);
1741 return;
1742 }
1743 idx++;
1744 if (idx >= PRISM2_TXFID_COUNT)
1745 idx = 0;
1746 } while (idx != local->next_txfid);
1747 spin_unlock(&local->txfidlock);
1748
1749 /* no empty TX buffers, stop queue */
1750 netif_stop_queue(dev);
1751}
1752
1753
1754/* Called only from software IRQ if PCI bus master is not used (with bus master
1755 * this can be called both from software and hardware IRQ) */
1756static int prism2_transmit(struct net_device *dev, int idx)
1757{
1758 struct hostap_interface *iface;
1759 local_info_t *local;
1760 int res;
1761
1762 iface = netdev_priv(dev);
1763 local = iface->local;
1764
1765 /* The driver tries to stop netif queue so that there would not be
1766 * more than one attempt to transmit frames going on; check that this
1767 * is really the case */
1768
1769 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1770 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1771 "when previous TX was pending\n", dev->name);
1772 return -1;
1773 }
1774
1775 /* stop the queue for the time that transmit is pending */
1776 netif_stop_queue(dev);
1777
1778 /* transmit packet */
1779 res = hfa384x_cmd_callback(
1780 dev,
1781 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1782 local->txfid[idx],
1783 prism2_transmit_cb, (long) idx);
1784
1785 if (res) {
1786 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1787 "failed (res=%d)\n", dev->name, res);
1788 dev->stats.tx_dropped++;
1789 netif_wake_queue(dev);
1790 return -1;
1791 }
1792 dev->trans_start = jiffies;
1793
1794 /* Since we did not wait for command completion, the card continues
1795 * to process on the background and we will finish handling when
1796 * command completion event is handled (prism2_cmd_ev() function) */
1797
1798 return 0;
1799}
1800
1801
1802/* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1803 * send the payload with this descriptor) */
1804/* Called only from software IRQ */
1805static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1806{
1807 struct hostap_interface *iface;
1808 local_info_t *local;
1809 struct hfa384x_tx_frame txdesc;
1810 struct hostap_skb_tx_data *meta;
1811 int hdr_len, data_len, idx, res, ret = -1;
1812 u16 tx_control, fc;
1813
1814 iface = netdev_priv(dev);
1815 local = iface->local;
1816
1817 meta = (struct hostap_skb_tx_data *) skb->cb;
1818
1819 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1820
1821 if ((local->func->card_present && !local->func->card_present(local)) ||
1822 !local->hw_ready || local->hw_downloading || local->pri_only) {
1823 if (net_ratelimit()) {
1824 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1825 " skipping\n", dev->name);
1826 }
1827 goto fail;
1828 }
1829
1830 memset(&txdesc, 0, sizeof(txdesc));
1831
1832 /* skb->data starts with txdesc->frame_control */
1833 hdr_len = 24;
1834 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1835 fc = le16_to_cpu(txdesc.frame_control);
1836 if (ieee80211_is_data(txdesc.frame_control) &&
1837 ieee80211_has_a4(txdesc.frame_control) &&
1838 skb->len >= 30) {
1839 /* Addr4 */
1840 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1841 ETH_ALEN);
1842 hdr_len += ETH_ALEN;
1843 }
1844
1845 tx_control = local->tx_control;
1846 if (meta->tx_cb_idx) {
1847 tx_control |= HFA384X_TX_CTRL_TX_OK;
1848 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1849 }
1850 txdesc.tx_control = cpu_to_le16(tx_control);
1851 txdesc.tx_rate = meta->rate;
1852
1853 data_len = skb->len - hdr_len;
1854 txdesc.data_len = cpu_to_le16(data_len);
1855 txdesc.len = cpu_to_be16(data_len);
1856
1857 idx = prism2_get_txfid_idx(local);
1858 if (idx < 0)
1859 goto fail;
1860
1861 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1862 hostap_dump_tx_header(dev->name, &txdesc);
1863
1864 spin_lock(&local->baplock);
1865 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1866
1867 if (!res)
1868 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1869 if (!res)
1870 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1871 skb->len - hdr_len);
1872 spin_unlock(&local->baplock);
1873
1874 if (!res)
1875 res = prism2_transmit(dev, idx);
1876 if (res) {
1877 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1878 dev->name);
1879 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1880 schedule_work(&local->reset_queue);
1881 goto fail;
1882 }
1883
1884 ret = 0;
1885
1886fail:
1887 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1888 return ret;
1889}
1890
1891
1892/* Some SMP systems have reported number of odd errors with hostap_pci. fid
1893 * register has changed values between consecutive reads for an unknown reason.
1894 * This should really not happen, so more debugging is needed. This test
1895 * version is a bit slower, but it will detect most of such register changes
1896 * and will try to get the correct fid eventually. */
1897#define EXTRA_FID_READ_TESTS
1898
1899static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1900{
1901#ifdef EXTRA_FID_READ_TESTS
1902 u16 val, val2, val3;
1903 int i;
1904
1905 for (i = 0; i < 10; i++) {
1906 val = HFA384X_INW(reg);
1907 val2 = HFA384X_INW(reg);
1908 val3 = HFA384X_INW(reg);
1909
1910 if (val == val2 && val == val3)
1911 return val;
1912
1913 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1914 " %04x %04x %04x\n",
1915 dev->name, i, reg, val, val2, val3);
1916 if ((val == val2 || val == val3) && val != 0)
1917 return val;
1918 if (val2 == val3 && val2 != 0)
1919 return val2;
1920 }
1921 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1922 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1923 return val;
1924#else /* EXTRA_FID_READ_TESTS */
1925 return HFA384X_INW(reg);
1926#endif /* EXTRA_FID_READ_TESTS */
1927}
1928
1929
1930/* Called only as a tasklet (software IRQ) */
1931static void prism2_rx(local_info_t *local)
1932{
1933 struct net_device *dev = local->dev;
1934 int res, rx_pending = 0;
1935 u16 len, hdr_len, rxfid, status, macport;
1936 struct hfa384x_rx_frame rxdesc;
1937 struct sk_buff *skb = NULL;
1938
1939 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1940
1941 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1942#ifndef final_version
1943 if (rxfid == 0) {
1944 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1945 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1946 rxfid);
1947 if (rxfid == 0) {
1948 schedule_work(&local->reset_queue);
1949 goto rx_dropped;
1950 }
1951 /* try to continue with the new rxfid value */
1952 }
1953#endif
1954
1955 spin_lock(&local->baplock);
1956 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1957 if (!res)
1958 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1959
1960 if (res) {
1961 spin_unlock(&local->baplock);
1962 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1963 res);
1964 if (res == -ETIMEDOUT) {
1965 schedule_work(&local->reset_queue);
1966 }
1967 goto rx_dropped;
1968 }
1969
1970 len = le16_to_cpu(rxdesc.data_len);
1971 hdr_len = sizeof(rxdesc);
1972 status = le16_to_cpu(rxdesc.status);
1973 macport = (status >> 8) & 0x07;
1974
1975 /* Drop frames with too large reported payload length. Monitor mode
1976 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1977 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1978 * macport 7 */
1979 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1980 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1981 if (len >= (u16) -14) {
1982 hdr_len -= 65535 - len;
1983 hdr_len--;
1984 }
1985 len = 0;
1986 } else {
1987 spin_unlock(&local->baplock);
1988 printk(KERN_DEBUG "%s: Received frame with invalid "
1989 "length 0x%04x\n", dev->name, len);
1990 hostap_dump_rx_header(dev->name, &rxdesc);
1991 goto rx_dropped;
1992 }
1993 }
1994
1995 skb = dev_alloc_skb(len + hdr_len);
1996 if (!skb) {
1997 spin_unlock(&local->baplock);
1998 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1999 dev->name);
2000 goto rx_dropped;
2001 }
2002 skb->dev = dev;
2003 memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2004
2005 if (len > 0)
2006 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2007 spin_unlock(&local->baplock);
2008 if (res) {
2009 printk(KERN_DEBUG "%s: RX failed to read "
2010 "frame data\n", dev->name);
2011 goto rx_dropped;
2012 }
2013
2014 skb_queue_tail(&local->rx_list, skb);
2015 tasklet_schedule(&local->rx_tasklet);
2016
2017 rx_exit:
2018 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2019 if (!rx_pending) {
2020 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2021 }
2022
2023 return;
2024
2025 rx_dropped:
2026 dev->stats.rx_dropped++;
2027 if (skb)
2028 dev_kfree_skb(skb);
2029 goto rx_exit;
2030}
2031
2032
2033/* Called only as a tasklet (software IRQ) */
2034static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2035{
2036 struct hfa384x_rx_frame *rxdesc;
2037 struct net_device *dev = skb->dev;
2038 struct hostap_80211_rx_status stats;
2039 int hdrlen, rx_hdrlen;
2040
2041 rx_hdrlen = sizeof(*rxdesc);
2042 if (skb->len < sizeof(*rxdesc)) {
2043 /* Allow monitor mode to receive shorter frames */
2044 if (local->iw_mode == IW_MODE_MONITOR &&
2045 skb->len >= sizeof(*rxdesc) - 30) {
2046 rx_hdrlen = skb->len;
2047 } else {
2048 dev_kfree_skb(skb);
2049 return;
2050 }
2051 }
2052
2053 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2054
2055 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2056 skb->len >= sizeof(*rxdesc))
2057 hostap_dump_rx_header(dev->name, rxdesc);
2058
2059 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2060 (!local->monitor_allow_fcserr ||
2061 local->iw_mode != IW_MODE_MONITOR))
2062 goto drop;
2063
2064 if (skb->len > PRISM2_DATA_MAXLEN) {
2065 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2066 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2067 goto drop;
2068 }
2069
2070 stats.mac_time = le32_to_cpu(rxdesc->time);
2071 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2072 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2073 stats.rate = rxdesc->rate;
2074
2075 /* Convert Prism2 RX structure into IEEE 802.11 header */
2076 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2077 if (hdrlen > rx_hdrlen)
2078 hdrlen = rx_hdrlen;
2079
2080 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2081 &rxdesc->frame_control, hdrlen);
2082
2083 hostap_80211_rx(dev, skb, &stats);
2084 return;
2085
2086 drop:
2087 dev_kfree_skb(skb);
2088}
2089
2090
2091/* Called only as a tasklet (software IRQ) */
2092static void hostap_rx_tasklet(unsigned long data)
2093{
2094 local_info_t *local = (local_info_t *) data;
2095 struct sk_buff *skb;
2096
2097 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2098 hostap_rx_skb(local, skb);
2099}
2100
2101
2102/* Called only from hardware IRQ */
2103static void prism2_alloc_ev(struct net_device *dev)
2104{
2105 struct hostap_interface *iface;
2106 local_info_t *local;
2107 int idx;
2108 u16 fid;
2109
2110 iface = netdev_priv(dev);
2111 local = iface->local;
2112
2113 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2114
2115 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2116
2117 spin_lock(&local->txfidlock);
2118 idx = local->next_alloc;
2119
2120 do {
2121 if (local->txfid[idx] == fid) {
2122 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2123 idx);
2124
2125#ifndef final_version
2126 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2127 printk("Already released txfid found at idx "
2128 "%d\n", idx);
2129 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2130 printk("Already reserved txfid found at idx "
2131 "%d\n", idx);
2132#endif
2133 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2134 idx++;
2135 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2136 idx;
2137
2138 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2139 netif_queue_stopped(dev))
2140 netif_wake_queue(dev);
2141
2142 spin_unlock(&local->txfidlock);
2143 return;
2144 }
2145
2146 idx++;
2147 if (idx >= PRISM2_TXFID_COUNT)
2148 idx = 0;
2149 } while (idx != local->next_alloc);
2150
2151 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2152 "read 0x%04x) for alloc event\n", dev->name, fid,
2153 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2154 printk(KERN_DEBUG "TXFIDs:");
2155 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2156 printk(" %04x[%04x]", local->txfid[idx],
2157 local->intransmitfid[idx]);
2158 printk("\n");
2159 spin_unlock(&local->txfidlock);
2160
2161 /* FIX: should probably schedule reset; reference to one txfid was lost
2162 * completely.. Bad things will happen if we run out of txfids
2163 * Actually, this will cause netdev watchdog to notice TX timeout and
2164 * then card reset after all txfids have been leaked. */
2165}
2166
2167
2168/* Called only as a tasklet (software IRQ) */
2169static void hostap_tx_callback(local_info_t *local,
2170 struct hfa384x_tx_frame *txdesc, int ok,
2171 char *payload)
2172{
2173 u16 sw_support, hdrlen, len;
2174 struct sk_buff *skb;
2175 struct hostap_tx_callback_info *cb;
2176
2177 /* Make sure that frame was from us. */
2178 if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2179 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2180 local->dev->name);
2181 return;
2182 }
2183
2184 sw_support = le32_to_cpu(txdesc->sw_support);
2185
2186 spin_lock(&local->lock);
2187 cb = local->tx_callback;
2188 while (cb != NULL && cb->idx != sw_support)
2189 cb = cb->next;
2190 spin_unlock(&local->lock);
2191
2192 if (cb == NULL) {
2193 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2194 local->dev->name, sw_support);
2195 return;
2196 }
2197
2198 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2199 len = le16_to_cpu(txdesc->data_len);
2200 skb = dev_alloc_skb(hdrlen + len);
2201 if (skb == NULL) {
2202 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2203 "skb\n", local->dev->name);
2204 return;
2205 }
2206
2207 memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2208 if (payload)
2209 memcpy(skb_put(skb, len), payload, len);
2210
2211 skb->dev = local->dev;
2212 skb_reset_mac_header(skb);
2213
2214 cb->func(skb, ok, cb->data);
2215}
2216
2217
2218/* Called only as a tasklet (software IRQ) */
2219static int hostap_tx_compl_read(local_info_t *local, int error,
2220 struct hfa384x_tx_frame *txdesc,
2221 char **payload)
2222{
2223 u16 fid, len;
2224 int res, ret = 0;
2225 struct net_device *dev = local->dev;
2226
2227 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2228
2229 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2230
2231 spin_lock(&local->baplock);
2232 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2233 if (!res)
2234 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2235 if (res) {
2236 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2237 "read txdesc\n", dev->name, error, fid);
2238 if (res == -ETIMEDOUT) {
2239 schedule_work(&local->reset_queue);
2240 }
2241 ret = -1;
2242 goto fail;
2243 }
2244 if (txdesc->sw_support) {
2245 len = le16_to_cpu(txdesc->data_len);
2246 if (len < PRISM2_DATA_MAXLEN) {
2247 *payload = kmalloc(len, GFP_ATOMIC);
2248 if (*payload == NULL ||
2249 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2250 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2251 "frame payload\n", dev->name);
2252 kfree(*payload);
2253 *payload = NULL;
2254 ret = -1;
2255 goto fail;
2256 }
2257 }
2258 }
2259
2260 fail:
2261 spin_unlock(&local->baplock);
2262
2263 return ret;
2264}
2265
2266
2267/* Called only as a tasklet (software IRQ) */
2268static void prism2_tx_ev(local_info_t *local)
2269{
2270 struct net_device *dev = local->dev;
2271 char *payload = NULL;
2272 struct hfa384x_tx_frame txdesc;
2273
2274 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2275 goto fail;
2276
2277 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2278 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2279 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2280 "duration_id=%d\n",
2281 dev->name, le16_to_cpu(txdesc.status),
2282 txdesc.retry_count, txdesc.tx_rate,
2283 le16_to_cpu(txdesc.seq_ctrl),
2284 le16_to_cpu(txdesc.duration_id));
2285 }
2286
2287 if (txdesc.sw_support)
2288 hostap_tx_callback(local, &txdesc, 1, payload);
2289 kfree(payload);
2290
2291 fail:
2292 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2293}
2294
2295
2296/* Called only as a tasklet (software IRQ) */
2297static void hostap_sta_tx_exc_tasklet(unsigned long data)
2298{
2299 local_info_t *local = (local_info_t *) data;
2300 struct sk_buff *skb;
2301
2302 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2303 struct hfa384x_tx_frame *txdesc =
2304 (struct hfa384x_tx_frame *) skb->data;
2305
2306 if (skb->len >= sizeof(*txdesc)) {
2307 /* Convert Prism2 RX structure into IEEE 802.11 header
2308 */
2309 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2310 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2311 &txdesc->frame_control, hdrlen);
2312
2313 hostap_handle_sta_tx_exc(local, skb);
2314 }
2315 dev_kfree_skb(skb);
2316 }
2317}
2318
2319
2320/* Called only as a tasklet (software IRQ) */
2321static void prism2_txexc(local_info_t *local)
2322{
2323 struct net_device *dev = local->dev;
2324 u16 status, fc;
2325 int show_dump, res;
2326 char *payload = NULL;
2327 struct hfa384x_tx_frame txdesc;
2328
2329 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2330 dev->stats.tx_errors++;
2331
2332 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2333 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2334 if (res)
2335 return;
2336
2337 status = le16_to_cpu(txdesc.status);
2338
2339 /* We produce a TXDROP event only for retry or lifetime
2340 * exceeded, because that's the only status that really mean
2341 * that this particular node went away.
2342 * Other errors means that *we* screwed up. - Jean II */
2343 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2344 {
2345 union iwreq_data wrqu;
2346
2347 /* Copy 802.11 dest address. */
2348 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2349 wrqu.addr.sa_family = ARPHRD_ETHER;
2350 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2351 } else
2352 show_dump = 1;
2353
2354 if (local->iw_mode == IW_MODE_MASTER ||
2355 local->iw_mode == IW_MODE_REPEAT ||
2356 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2357 struct sk_buff *skb;
2358 skb = dev_alloc_skb(sizeof(txdesc));
2359 if (skb) {
2360 memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2361 sizeof(txdesc));
2362 skb_queue_tail(&local->sta_tx_exc_list, skb);
2363 tasklet_schedule(&local->sta_tx_exc_tasklet);
2364 }
2365 }
2366
2367 if (txdesc.sw_support)
2368 hostap_tx_callback(local, &txdesc, 0, payload);
2369 kfree(payload);
2370
2371 if (!show_dump)
2372 return;
2373
2374 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2375 " tx_control=%04x\n",
2376 dev->name, status,
2377 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2378 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2379 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2380 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2381 le16_to_cpu(txdesc.tx_control));
2382
2383 fc = le16_to_cpu(txdesc.frame_control);
2384 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2385 "(%s%s%s::%d%s%s)\n",
2386 txdesc.retry_count, txdesc.tx_rate, fc,
2387 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2388 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2389 ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2390 (fc & IEEE80211_FCTL_STYPE) >> 4,
2391 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2392 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2393 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2394 txdesc.addr1, txdesc.addr2,
2395 txdesc.addr3, txdesc.addr4);
2396}
2397
2398
2399/* Called only as a tasklet (software IRQ) */
2400static void hostap_info_tasklet(unsigned long data)
2401{
2402 local_info_t *local = (local_info_t *) data;
2403 struct sk_buff *skb;
2404
2405 while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2406 hostap_info_process(local, skb);
2407 dev_kfree_skb(skb);
2408 }
2409}
2410
2411
2412/* Called only as a tasklet (software IRQ) */
2413static void prism2_info(local_info_t *local)
2414{
2415 struct net_device *dev = local->dev;
2416 u16 fid;
2417 int res, left;
2418 struct hfa384x_info_frame info;
2419 struct sk_buff *skb;
2420
2421 fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2422
2423 spin_lock(&local->baplock);
2424 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2425 if (!res)
2426 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2427 if (res) {
2428 spin_unlock(&local->baplock);
2429 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2430 fid);
2431 if (res == -ETIMEDOUT) {
2432 schedule_work(&local->reset_queue);
2433 }
2434 goto out;
2435 }
2436
2437 left = (le16_to_cpu(info.len) - 1) * 2;
2438
2439 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2440 /* data register seems to give 0x8000 in some error cases even
2441 * though busy bit is not set in offset register;
2442 * in addition, length must be at least 1 due to type field */
2443 spin_unlock(&local->baplock);
2444 printk(KERN_DEBUG "%s: Received info frame with invalid "
2445 "length 0x%04x (type 0x%04x)\n", dev->name,
2446 le16_to_cpu(info.len), le16_to_cpu(info.type));
2447 goto out;
2448 }
2449
2450 skb = dev_alloc_skb(sizeof(info) + left);
2451 if (skb == NULL) {
2452 spin_unlock(&local->baplock);
2453 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2454 "frame\n", dev->name);
2455 goto out;
2456 }
2457
2458 memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2459 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2460 {
2461 spin_unlock(&local->baplock);
2462 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2463 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2464 le16_to_cpu(info.len), le16_to_cpu(info.type));
2465 dev_kfree_skb(skb);
2466 goto out;
2467 }
2468 spin_unlock(&local->baplock);
2469
2470 skb_queue_tail(&local->info_list, skb);
2471 tasklet_schedule(&local->info_tasklet);
2472
2473 out:
2474 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2475}
2476
2477
2478/* Called only as a tasklet (software IRQ) */
2479static void hostap_bap_tasklet(unsigned long data)
2480{
2481 local_info_t *local = (local_info_t *) data;
2482 struct net_device *dev = local->dev;
2483 u16 ev;
2484 int frames = 30;
2485
2486 if (local->func->card_present && !local->func->card_present(local))
2487 return;
2488
2489 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2490
2491 /* Process all pending BAP events without generating new interrupts
2492 * for them */
2493 while (frames-- > 0) {
2494 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2495 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2496 break;
2497 if (ev & HFA384X_EV_RX)
2498 prism2_rx(local);
2499 if (ev & HFA384X_EV_INFO)
2500 prism2_info(local);
2501 if (ev & HFA384X_EV_TX)
2502 prism2_tx_ev(local);
2503 if (ev & HFA384X_EV_TXEXC)
2504 prism2_txexc(local);
2505 }
2506
2507 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2508 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2509
2510 /* Enable interrupts for new BAP events */
2511 hfa384x_events_all(dev);
2512 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2513}
2514
2515
2516/* Called only from hardware IRQ */
2517static void prism2_infdrop(struct net_device *dev)
2518{
2519 static unsigned long last_inquire = 0;
2520
2521 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2522
2523 /* some firmware versions seem to get stuck with
2524 * full CommTallies in high traffic load cases; every
2525 * packet will then cause INFDROP event and CommTallies
2526 * info frame will not be sent automatically. Try to
2527 * get out of this state by inquiring CommTallies. */
2528 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2529 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2530 HFA384X_INFO_COMMTALLIES, NULL, 0);
2531 last_inquire = jiffies;
2532 }
2533}
2534
2535
2536/* Called only from hardware IRQ */
2537static void prism2_ev_tick(struct net_device *dev)
2538{
2539 struct hostap_interface *iface;
2540 local_info_t *local;
2541 u16 evstat, inten;
2542 static int prev_stuck = 0;
2543
2544 iface = netdev_priv(dev);
2545 local = iface->local;
2546
2547 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2548 local->last_tick_timer) {
2549 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2550 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2551 if (!prev_stuck) {
2552 printk(KERN_INFO "%s: SW TICK stuck? "
2553 "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2554 dev->name, local->bits, evstat, inten);
2555 }
2556 local->sw_tick_stuck++;
2557 if ((evstat & HFA384X_BAP0_EVENTS) &&
2558 (inten & HFA384X_BAP0_EVENTS)) {
2559 printk(KERN_INFO "%s: trying to recover from IRQ "
2560 "hang\n", dev->name);
2561 hfa384x_events_no_bap0(dev);
2562 }
2563 prev_stuck = 1;
2564 } else
2565 prev_stuck = 0;
2566}
2567
2568
2569/* Called only from hardware IRQ */
2570static void prism2_check_magic(local_info_t *local)
2571{
2572 /* at least PCI Prism2.5 with bus mastering seems to sometimes
2573 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2574 * register once or twice seems to get the correct value.. PCI cards
2575 * cannot anyway be removed during normal operation, so there is not
2576 * really any need for this verification with them. */
2577
2578#ifndef PRISM2_PCI
2579#ifndef final_version
2580 static unsigned long last_magic_err = 0;
2581 struct net_device *dev = local->dev;
2582
2583 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2584 if (!local->hw_ready)
2585 return;
2586 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2587 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2588 printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2589 "%04X != %04X - card removed?\n", dev->name,
2590 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2591 HFA384X_MAGIC);
2592 last_magic_err = jiffies;
2593 } else if (net_ratelimit()) {
2594 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2595 "MAGIC=%04x\n", dev->name,
2596 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2597 HFA384X_MAGIC);
2598 }
2599 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2600 schedule_work(&local->reset_queue);
2601 return;
2602 }
2603#endif /* final_version */
2604#endif /* !PRISM2_PCI */
2605}
2606
2607
2608/* Called only from hardware IRQ */
2609static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2610{
2611 struct net_device *dev = dev_id;
2612 struct hostap_interface *iface;
2613 local_info_t *local;
2614 int events = 0;
2615 u16 ev;
2616
2617 iface = netdev_priv(dev);
2618 local = iface->local;
2619
2620 /* Detect early interrupt before driver is fully configured */
2621 spin_lock(&local->irq_init_lock);
2622 if (!dev->base_addr) {
2623 if (net_ratelimit()) {
2624 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2625 dev->name);
2626 }
2627 spin_unlock(&local->irq_init_lock);
2628 return IRQ_HANDLED;
2629 }
2630 spin_unlock(&local->irq_init_lock);
2631
2632 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2633
2634 if (local->func->card_present && !local->func->card_present(local)) {
2635 if (net_ratelimit()) {
2636 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2637 dev->name);
2638 }
2639 return IRQ_HANDLED;
2640 }
2641
2642 prism2_check_magic(local);
2643
2644 for (;;) {
2645 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2646 if (ev == 0xffff) {
2647 if (local->shutdown)
2648 return IRQ_HANDLED;
2649 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2650 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2651 dev->name);
2652 return IRQ_HANDLED;
2653 }
2654
2655 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2656 if (ev == 0)
2657 break;
2658
2659 if (ev & HFA384X_EV_CMD) {
2660 prism2_cmd_ev(dev);
2661 }
2662
2663 /* Above events are needed even before hw is ready, but other
2664 * events should be skipped during initialization. This may
2665 * change for AllocEv if allocate_fid is implemented without
2666 * busy waiting. */
2667 if (!local->hw_ready || local->hw_resetting ||
2668 !local->dev_enabled) {
2669 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2670 if (ev & HFA384X_EV_CMD)
2671 goto next_event;
2672 if ((ev & HFA384X_EVENT_MASK) == 0)
2673 return IRQ_HANDLED;
2674 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2675 net_ratelimit()) {
2676 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2677 "not ready; skipping events 0x%04x "
2678 "(IntEn=0x%04x)%s%s%s\n",
2679 dev->name, ev,
2680 HFA384X_INW(HFA384X_INTEN_OFF),
2681 !local->hw_ready ? " (!hw_ready)" : "",
2682 local->hw_resetting ?
2683 " (hw_resetting)" : "",
2684 !local->dev_enabled ?
2685 " (!dev_enabled)" : "");
2686 }
2687 HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2688 return IRQ_HANDLED;
2689 }
2690
2691 if (ev & HFA384X_EV_TICK) {
2692 prism2_ev_tick(dev);
2693 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2694 }
2695
2696 if (ev & HFA384X_EV_ALLOC) {
2697 prism2_alloc_ev(dev);
2698 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2699 }
2700
2701 /* Reading data from the card is quite time consuming, so do it
2702 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2703 * and unmasked after needed data has been read completely. */
2704 if (ev & HFA384X_BAP0_EVENTS) {
2705 hfa384x_events_no_bap0(dev);
2706 tasklet_schedule(&local->bap_tasklet);
2707 }
2708
2709#ifndef final_version
2710 if (ev & HFA384X_EV_WTERR) {
2711 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2712 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2713 }
2714#endif /* final_version */
2715
2716 if (ev & HFA384X_EV_INFDROP) {
2717 prism2_infdrop(dev);
2718 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2719 }
2720
2721 next_event:
2722 events++;
2723 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2724 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2725 "(EvStat=0x%04x)\n",
2726 PRISM2_MAX_INTERRUPT_EVENTS,
2727 HFA384X_INW(HFA384X_EVSTAT_OFF));
2728 break;
2729 }
2730 }
2731 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2732 return IRQ_RETVAL(events);
2733}
2734
2735
2736static void prism2_check_sta_fw_version(local_info_t *local)
2737{
2738 struct hfa384x_comp_ident comp;
2739 int id, variant, major, minor;
2740
2741 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2742 &comp, sizeof(comp), 1) < 0)
2743 return;
2744
2745 local->fw_ap = 0;
2746 id = le16_to_cpu(comp.id);
2747 if (id != HFA384X_COMP_ID_STA) {
2748 if (id == HFA384X_COMP_ID_FW_AP)
2749 local->fw_ap = 1;
2750 return;
2751 }
2752
2753 major = __le16_to_cpu(comp.major);
2754 minor = __le16_to_cpu(comp.minor);
2755 variant = __le16_to_cpu(comp.variant);
2756 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2757
2758 /* Station firmware versions before 1.4.x seem to have a bug in
2759 * firmware-based WEP encryption when using Host AP mode, so use
2760 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2761 * first one that has been seen to produce correct encryption, but the
2762 * bug might be fixed before that (although, at least 1.4.2 is broken).
2763 */
2764 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2765
2766 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2767 !local->fw_encrypt_ok) {
2768 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2769 "a workaround for firmware bug in Host AP mode WEP\n",
2770 local->dev->name);
2771 local->host_encrypt = 1;
2772 }
2773
2774 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2775 * in station firmware versions before 1.5.x. With these versions, the
2776 * driver uses a workaround with bogus frame format (4th address after
2777 * the payload). This is not compatible with other AP devices. Since
2778 * the firmware bug is fixed in the latest station firmware versions,
2779 * automatically enable standard compliant mode for cards using station
2780 * firmware version 1.5.0 or newer. */
2781 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2782 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2783 else {
2784 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2785 "workaround for firmware bug in Host AP mode WDS\n",
2786 local->dev->name);
2787 }
2788
2789 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2790}
2791
2792
2793static void hostap_passive_scan(unsigned long data)
2794{
2795 local_info_t *local = (local_info_t *) data;
2796 struct net_device *dev = local->dev;
2797 u16 chan;
2798
2799 if (local->passive_scan_interval <= 0)
2800 return;
2801
2802 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2803 int max_tries = 16;
2804
2805 /* Even though host system does not really know when the WLAN
2806 * MAC is sending frames, try to avoid changing channels for
2807 * passive scanning when a host-generated frame is being
2808 * transmitted */
2809 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2810 printk(KERN_DEBUG "%s: passive scan detected pending "
2811 "TX - delaying\n", dev->name);
2812 local->passive_scan_timer.expires = jiffies + HZ / 10;
2813 add_timer(&local->passive_scan_timer);
2814 return;
2815 }
2816
2817 do {
2818 local->passive_scan_channel++;
2819 if (local->passive_scan_channel > 14)
2820 local->passive_scan_channel = 1;
2821 max_tries--;
2822 } while (!(local->channel_mask &
2823 (1 << (local->passive_scan_channel - 1))) &&
2824 max_tries > 0);
2825
2826 if (max_tries == 0) {
2827 printk(KERN_INFO "%s: no allowed passive scan channels"
2828 " found\n", dev->name);
2829 return;
2830 }
2831
2832 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2833 dev->name, local->passive_scan_channel);
2834 chan = local->passive_scan_channel;
2835 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2836 local->passive_scan_timer.expires = jiffies + HZ / 10;
2837 } else {
2838 chan = local->channel;
2839 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2840 local->passive_scan_timer.expires = jiffies +
2841 local->passive_scan_interval * HZ;
2842 }
2843
2844 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2845 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2846 chan, NULL, 0))
2847 printk(KERN_ERR "%s: passive scan channel set %d "
2848 "failed\n", dev->name, chan);
2849
2850 add_timer(&local->passive_scan_timer);
2851}
2852
2853
2854/* Called only as a scheduled task when communications quality values should
2855 * be updated. */
2856static void handle_comms_qual_update(struct work_struct *work)
2857{
2858 local_info_t *local =
2859 container_of(work, local_info_t, comms_qual_update);
2860 prism2_update_comms_qual(local->dev);
2861}
2862
2863
2864/* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2865 * used to monitor that local->last_tick_timer is being updated. If not,
2866 * interrupt busy-loop is assumed and driver tries to recover by masking out
2867 * some events. */
2868static void hostap_tick_timer(unsigned long data)
2869{
2870 static unsigned long last_inquire = 0;
2871 local_info_t *local = (local_info_t *) data;
2872 local->last_tick_timer = jiffies;
2873
2874 /* Inquire CommTallies every 10 seconds to keep the statistics updated
2875 * more often during low load and when using 32-bit tallies. */
2876 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2877 !local->hw_downloading && local->hw_ready &&
2878 !local->hw_resetting && local->dev_enabled) {
2879 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2880 HFA384X_INFO_COMMTALLIES, NULL, 0);
2881 last_inquire = jiffies;
2882 }
2883
2884 if ((local->last_comms_qual_update == 0 ||
2885 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2886 (local->iw_mode == IW_MODE_INFRA ||
2887 local->iw_mode == IW_MODE_ADHOC)) {
2888 schedule_work(&local->comms_qual_update);
2889 }
2890
2891 local->tick_timer.expires = jiffies + 2 * HZ;
2892 add_timer(&local->tick_timer);
2893}
2894
2895
2896#ifndef PRISM2_NO_PROCFS_DEBUG
2897static int prism2_registers_proc_read(char *page, char **start, off_t off,
2898 int count, int *eof, void *data)
2899{
2900 char *p = page;
2901 local_info_t *local = (local_info_t *) data;
2902
2903 if (off != 0) {
2904 *eof = 1;
2905 return 0;
2906 }
2907
2908#define SHOW_REG(n) \
2909p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2910
2911 SHOW_REG(CMD);
2912 SHOW_REG(PARAM0);
2913 SHOW_REG(PARAM1);
2914 SHOW_REG(PARAM2);
2915 SHOW_REG(STATUS);
2916 SHOW_REG(RESP0);
2917 SHOW_REG(RESP1);
2918 SHOW_REG(RESP2);
2919 SHOW_REG(INFOFID);
2920 SHOW_REG(CONTROL);
2921 SHOW_REG(SELECT0);
2922 SHOW_REG(SELECT1);
2923 SHOW_REG(OFFSET0);
2924 SHOW_REG(OFFSET1);
2925 SHOW_REG(RXFID);
2926 SHOW_REG(ALLOCFID);
2927 SHOW_REG(TXCOMPLFID);
2928 SHOW_REG(SWSUPPORT0);
2929 SHOW_REG(SWSUPPORT1);
2930 SHOW_REG(SWSUPPORT2);
2931 SHOW_REG(EVSTAT);
2932 SHOW_REG(INTEN);
2933 SHOW_REG(EVACK);
2934 /* Do not read data registers, because they change the state of the
2935 * MAC (offset += 2) */
2936 /* SHOW_REG(DATA0); */
2937 /* SHOW_REG(DATA1); */
2938 SHOW_REG(AUXPAGE);
2939 SHOW_REG(AUXOFFSET);
2940 /* SHOW_REG(AUXDATA); */
2941#ifdef PRISM2_PCI
2942 SHOW_REG(PCICOR);
2943 SHOW_REG(PCIHCR);
2944 SHOW_REG(PCI_M0_ADDRH);
2945 SHOW_REG(PCI_M0_ADDRL);
2946 SHOW_REG(PCI_M0_LEN);
2947 SHOW_REG(PCI_M0_CTL);
2948 SHOW_REG(PCI_STATUS);
2949 SHOW_REG(PCI_M1_ADDRH);
2950 SHOW_REG(PCI_M1_ADDRL);
2951 SHOW_REG(PCI_M1_LEN);
2952 SHOW_REG(PCI_M1_CTL);
2953#endif /* PRISM2_PCI */
2954
2955 return (p - page);
2956}
2957#endif /* PRISM2_NO_PROCFS_DEBUG */
2958
2959
2960struct set_tim_data {
2961 struct list_head list;
2962 int aid;
2963 int set;
2964};
2965
2966static int prism2_set_tim(struct net_device *dev, int aid, int set)
2967{
2968 struct list_head *ptr;
2969 struct set_tim_data *new_entry;
2970 struct hostap_interface *iface;
2971 local_info_t *local;
2972
2973 iface = netdev_priv(dev);
2974 local = iface->local;
2975
2976 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2977 if (new_entry == NULL)
2978 return -ENOMEM;
2979
2980 new_entry->aid = aid;
2981 new_entry->set = set;
2982
2983 spin_lock_bh(&local->set_tim_lock);
2984 list_for_each(ptr, &local->set_tim_list) {
2985 struct set_tim_data *entry =
2986 list_entry(ptr, struct set_tim_data, list);
2987 if (entry->aid == aid) {
2988 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2989 "set=%d ==> %d\n",
2990 local->dev->name, aid, entry->set, set);
2991 entry->set = set;
2992 kfree(new_entry);
2993 new_entry = NULL;
2994 break;
2995 }
2996 }
2997 if (new_entry)
2998 list_add_tail(&new_entry->list, &local->set_tim_list);
2999 spin_unlock_bh(&local->set_tim_lock);
3000
3001 schedule_work(&local->set_tim_queue);
3002
3003 return 0;
3004}
3005
3006
3007static void handle_set_tim_queue(struct work_struct *work)
3008{
3009 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3010 struct set_tim_data *entry;
3011 u16 val;
3012
3013 for (;;) {
3014 entry = NULL;
3015 spin_lock_bh(&local->set_tim_lock);
3016 if (!list_empty(&local->set_tim_list)) {
3017 entry = list_entry(local->set_tim_list.next,
3018 struct set_tim_data, list);
3019 list_del(&entry->list);
3020 }
3021 spin_unlock_bh(&local->set_tim_lock);
3022 if (!entry)
3023 break;
3024
3025 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3026 local->dev->name, entry->aid, entry->set);
3027
3028 val = entry->aid;
3029 if (entry->set)
3030 val |= 0x8000;
3031 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3032 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3033 "set=%d)\n",
3034 local->dev->name, entry->aid, entry->set);
3035 }
3036
3037 kfree(entry);
3038 }
3039}
3040
3041
3042static void prism2_clear_set_tim_queue(local_info_t *local)
3043{
3044 struct list_head *ptr, *n;
3045
3046 list_for_each_safe(ptr, n, &local->set_tim_list) {
3047 struct set_tim_data *entry;
3048 entry = list_entry(ptr, struct set_tim_data, list);
3049 list_del(&entry->list);
3050 kfree(entry);
3051 }
3052}
3053
3054
3055/*
3056 * HostAP uses two layers of net devices, where the inner
3057 * layer gets called all the time from the outer layer.
3058 * This is a natural nesting, which needs a split lock type.
3059 */
3060static struct lock_class_key hostap_netdev_xmit_lock_key;
3061static struct lock_class_key hostap_netdev_addr_lock_key;
3062
3063static void prism2_set_lockdep_class_one(struct net_device *dev,
3064 struct netdev_queue *txq,
3065 void *_unused)
3066{
3067 lockdep_set_class(&txq->_xmit_lock,
3068 &hostap_netdev_xmit_lock_key);
3069}
3070
3071static void prism2_set_lockdep_class(struct net_device *dev)
3072{
3073 lockdep_set_class(&dev->addr_list_lock,
3074 &hostap_netdev_addr_lock_key);
3075 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3076}
3077
3078static struct net_device *
3079prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3080 struct device *sdev)
3081{
3082 struct net_device *dev;
3083 struct hostap_interface *iface;
3084 struct local_info *local;
3085 int len, i, ret;
3086
3087 if (funcs == NULL)
3088 return NULL;
3089
3090 len = strlen(dev_template);
3091 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3092 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3093 dev_template);
3094 return NULL;
3095 }
3096
3097 len = sizeof(struct hostap_interface) +
3098 3 + sizeof(struct local_info) +
3099 3 + sizeof(struct ap_data);
3100
3101 dev = alloc_etherdev(len);
3102 if (dev == NULL)
3103 return NULL;
3104
3105 iface = netdev_priv(dev);
3106 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3107 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3108 local->dev = iface->dev = dev;
3109 iface->local = local;
3110 iface->type = HOSTAP_INTERFACE_MASTER;
3111 INIT_LIST_HEAD(&local->hostap_interfaces);
3112
3113 local->hw_module = THIS_MODULE;
3114
3115#ifdef PRISM2_IO_DEBUG
3116 local->io_debug_enabled = 1;
3117#endif /* PRISM2_IO_DEBUG */
3118
3119 local->func = funcs;
3120 local->func->cmd = hfa384x_cmd;
3121 local->func->read_regs = hfa384x_read_regs;
3122 local->func->get_rid = hfa384x_get_rid;
3123 local->func->set_rid = hfa384x_set_rid;
3124 local->func->hw_enable = prism2_hw_enable;
3125 local->func->hw_config = prism2_hw_config;
3126 local->func->hw_reset = prism2_hw_reset;
3127 local->func->hw_shutdown = prism2_hw_shutdown;
3128 local->func->reset_port = prism2_reset_port;
3129 local->func->schedule_reset = prism2_schedule_reset;
3130#ifdef PRISM2_DOWNLOAD_SUPPORT
3131 local->func->read_aux = prism2_download_aux_dump;
3132 local->func->download = prism2_download;
3133#endif /* PRISM2_DOWNLOAD_SUPPORT */
3134 local->func->tx = prism2_tx_80211;
3135 local->func->set_tim = prism2_set_tim;
3136 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3137 * skb->data (FIX: maybe for DMA bus
3138 * mastering? */
3139
3140 local->mtu = mtu;
3141
3142 rwlock_init(&local->iface_lock);
3143 spin_lock_init(&local->txfidlock);
3144 spin_lock_init(&local->cmdlock);
3145 spin_lock_init(&local->baplock);
3146 spin_lock_init(&local->lock);
3147 spin_lock_init(&local->irq_init_lock);
3148 mutex_init(&local->rid_bap_mtx);
3149
3150 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3151 card_idx = 0;
3152 local->card_idx = card_idx;
3153
3154 len = strlen(essid);
3155 memcpy(local->essid, essid,
3156 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3157 local->essid[MAX_SSID_LEN] = '\0';
3158 i = GET_INT_PARM(iw_mode, card_idx);
3159 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3160 i == IW_MODE_MONITOR) {
3161 local->iw_mode = i;
3162 } else {
3163 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3164 "IW_MODE_MASTER\n", i);
3165 local->iw_mode = IW_MODE_MASTER;
3166 }
3167 local->channel = GET_INT_PARM(channel, card_idx);
3168 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3169 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3170 local->wds_max_connections = 16;
3171 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3172 local->manual_retry_count = -1;
3173 local->rts_threshold = 2347;
3174 local->fragm_threshold = 2346;
3175 local->rssi_to_dBm = 100; /* default; to be overriden by
3176 * cnfDbmAdjust, if available */
3177 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3178 local->sram_type = -1;
3179 local->scan_channel_mask = 0xffff;
3180 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3181
3182 /* Initialize task queue structures */
3183 INIT_WORK(&local->reset_queue, handle_reset_queue);
3184 INIT_WORK(&local->set_multicast_list_queue,
3185 hostap_set_multicast_list_queue);
3186
3187 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3188 INIT_LIST_HEAD(&local->set_tim_list);
3189 spin_lock_init(&local->set_tim_lock);
3190
3191 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3192
3193 /* Initialize tasklets for handling hardware IRQ related operations
3194 * outside hw IRQ handler */
3195#define HOSTAP_TASKLET_INIT(q, f, d) \
3196do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3197while (0)
3198 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3199 (unsigned long) local);
3200
3201 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3202 (unsigned long) local);
3203 hostap_info_init(local);
3204
3205 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3206 hostap_rx_tasklet, (unsigned long) local);
3207 skb_queue_head_init(&local->rx_list);
3208
3209 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3210 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3211 skb_queue_head_init(&local->sta_tx_exc_list);
3212
3213 INIT_LIST_HEAD(&local->cmd_queue);
3214 init_waitqueue_head(&local->hostscan_wq);
3215
3216 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3217
3218 init_timer(&local->passive_scan_timer);
3219 local->passive_scan_timer.data = (unsigned long) local;
3220 local->passive_scan_timer.function = hostap_passive_scan;
3221
3222 init_timer(&local->tick_timer);
3223 local->tick_timer.data = (unsigned long) local;
3224 local->tick_timer.function = hostap_tick_timer;
3225 local->tick_timer.expires = jiffies + 2 * HZ;
3226 add_timer(&local->tick_timer);
3227
3228 INIT_LIST_HEAD(&local->bss_list);
3229
3230 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3231
3232 dev->type = ARPHRD_IEEE80211;
3233 dev->header_ops = &hostap_80211_ops;
3234
3235 rtnl_lock();
3236 ret = dev_alloc_name(dev, "wifi%d");
3237 SET_NETDEV_DEV(dev, sdev);
3238 if (ret >= 0)
3239 ret = register_netdevice(dev);
3240
3241 prism2_set_lockdep_class(dev);
3242 rtnl_unlock();
3243 if (ret < 0) {
3244 printk(KERN_WARNING "%s: register netdevice failed!\n",
3245 dev_info);
3246 goto fail;
3247 }
3248 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3249
3250 hostap_init_data(local);
3251 return dev;
3252
3253 fail:
3254 free_netdev(dev);
3255 return NULL;
3256}
3257
3258
3259static int hostap_hw_ready(struct net_device *dev)
3260{
3261 struct hostap_interface *iface;
3262 struct local_info *local;
3263
3264 iface = netdev_priv(dev);
3265 local = iface->local;
3266 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3267 "", dev_template);
3268
3269 if (local->ddev) {
3270 if (local->iw_mode == IW_MODE_INFRA ||
3271 local->iw_mode == IW_MODE_ADHOC) {
3272 netif_carrier_off(local->dev);
3273 netif_carrier_off(local->ddev);
3274 }
3275 hostap_init_proc(local);
3276#ifndef PRISM2_NO_PROCFS_DEBUG
3277 create_proc_read_entry("registers", 0, local->proc,
3278 prism2_registers_proc_read, local);
3279#endif /* PRISM2_NO_PROCFS_DEBUG */
3280 hostap_init_ap_proc(local);
3281 return 0;
3282 }
3283
3284 return -1;
3285}
3286
3287
3288static void prism2_free_local_data(struct net_device *dev)
3289{
3290 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3291 int i;
3292 struct hostap_interface *iface;
3293 struct local_info *local;
3294 struct list_head *ptr, *n;
3295
3296 if (dev == NULL)
3297 return;
3298
3299 iface = netdev_priv(dev);
3300 local = iface->local;
3301
3302 /* Unregister all netdevs before freeing local data. */
3303 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3304 iface = list_entry(ptr, struct hostap_interface, list);
3305 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3306 /* special handling for this interface below */
3307 continue;
3308 }
3309 hostap_remove_interface(iface->dev, 0, 1);
3310 }
3311
3312 unregister_netdev(local->dev);
3313
3314 flush_work_sync(&local->reset_queue);
3315 flush_work_sync(&local->set_multicast_list_queue);
3316 flush_work_sync(&local->set_tim_queue);
3317#ifndef PRISM2_NO_STATION_MODES
3318 flush_work_sync(&local->info_queue);
3319#endif
3320 flush_work_sync(&local->comms_qual_update);
3321
3322 lib80211_crypt_info_free(&local->crypt_info);
3323
3324 if (timer_pending(&local->passive_scan_timer))
3325 del_timer(&local->passive_scan_timer);
3326
3327 if (timer_pending(&local->tick_timer))
3328 del_timer(&local->tick_timer);
3329
3330 prism2_clear_cmd_queue(local);
3331
3332 skb_queue_purge(&local->info_list);
3333 skb_queue_purge(&local->rx_list);
3334 skb_queue_purge(&local->sta_tx_exc_list);
3335
3336 if (local->dev_enabled)
3337 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3338
3339 if (local->ap != NULL)
3340 hostap_free_data(local->ap);
3341
3342#ifndef PRISM2_NO_PROCFS_DEBUG
3343 if (local->proc != NULL)
3344 remove_proc_entry("registers", local->proc);
3345#endif /* PRISM2_NO_PROCFS_DEBUG */
3346 hostap_remove_proc(local);
3347
3348 tx_cb = local->tx_callback;
3349 while (tx_cb != NULL) {
3350 tx_cb_prev = tx_cb;
3351 tx_cb = tx_cb->next;
3352 kfree(tx_cb_prev);
3353 }
3354
3355 hostap_set_hostapd(local, 0, 0);
3356 hostap_set_hostapd_sta(local, 0, 0);
3357
3358 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3359 if (local->frag_cache[i].skb != NULL)
3360 dev_kfree_skb(local->frag_cache[i].skb);
3361 }
3362
3363#ifdef PRISM2_DOWNLOAD_SUPPORT
3364 prism2_download_free_data(local->dl_pri);
3365 prism2_download_free_data(local->dl_sec);
3366#endif /* PRISM2_DOWNLOAD_SUPPORT */
3367
3368 prism2_clear_set_tim_queue(local);
3369
3370 list_for_each_safe(ptr, n, &local->bss_list) {
3371 struct hostap_bss_info *bss =
3372 list_entry(ptr, struct hostap_bss_info, list);
3373 kfree(bss);
3374 }
3375
3376 kfree(local->pda);
3377 kfree(local->last_scan_results);
3378 kfree(local->generic_elem);
3379
3380 free_netdev(local->dev);
3381}
3382
3383
3384#if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3385static void prism2_suspend(struct net_device *dev)
3386{
3387 struct hostap_interface *iface;
3388 struct local_info *local;
3389 union iwreq_data wrqu;
3390
3391 iface = netdev_priv(dev);
3392 local = iface->local;
3393
3394 /* Send disconnect event, e.g., to trigger reassociation after resume
3395 * if wpa_supplicant is used. */
3396 memset(&wrqu, 0, sizeof(wrqu));
3397 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3398 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3399
3400 /* Disable hardware and firmware */
3401 prism2_hw_shutdown(dev, 0);
3402}
3403#endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3404
3405
3406/* These might at some point be compiled separately and used as separate
3407 * kernel modules or linked into one */
3408#ifdef PRISM2_DOWNLOAD_SUPPORT
3409#include "hostap_download.c"
3410#endif /* PRISM2_DOWNLOAD_SUPPORT */
3411
3412#ifdef PRISM2_CALLBACK
3413/* External hostap_callback.c file can be used to, e.g., blink activity led.
3414 * This can use platform specific code and must define prism2_callback()
3415 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3416 * used. */
3417#include "hostap_callback.c"
3418#endif /* PRISM2_CALLBACK */