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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 <linux/uaccess.h>
36
37#include <linux/slab.h>
38#include <linux/netdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/proc_fs.h>
41#include <linux/seq_file.h>
42#include <linux/if_arp.h>
43#include <linux/delay.h>
44#include <linux/random.h>
45#include <linux/wait.h>
46#include <linux/sched/signal.h>
47#include <linux/rtnetlink.h>
48#include <linux/wireless.h>
49#include <net/iw_handler.h>
50#include <net/lib80211.h>
51#include <asm/irq.h>
52
53#include "hostap_80211.h"
54#include "hostap.h"
55#include "hostap_ap.h"
56
57
58/* #define final_version */
59
60static int mtu = 1500;
61module_param(mtu, int, 0444);
62MODULE_PARM_DESC(mtu, "Maximum transfer unit");
63
64static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
65module_param_array(channel, int, NULL, 0444);
66MODULE_PARM_DESC(channel, "Initial channel");
67
68static char essid[33] = "test";
69module_param_string(essid, essid, sizeof(essid), 0444);
70MODULE_PARM_DESC(essid, "Host AP's ESSID");
71
72static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
73module_param_array(iw_mode, int, NULL, 0444);
74MODULE_PARM_DESC(iw_mode, "Initial operation mode");
75
76static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
77module_param_array(beacon_int, int, NULL, 0444);
78MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
79
80static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
81module_param_array(dtim_period, int, NULL, 0444);
82MODULE_PARM_DESC(dtim_period, "DTIM period");
83
84static char dev_template[16] = "wlan%d";
85module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
86MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
87 "wlan%d)");
88
89#ifdef final_version
90#define EXTRA_EVENTS_WTERR 0
91#else
92/* check WTERR events (Wait Time-out) in development versions */
93#define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
94#endif
95
96/* Events that will be using BAP0 */
97#define HFA384X_BAP0_EVENTS \
98 (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
99
100/* event mask, i.e., events that will result in an interrupt */
101#define HFA384X_EVENT_MASK \
102 (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
103 HFA384X_EV_CMD | HFA384X_EV_TICK | \
104 EXTRA_EVENTS_WTERR)
105
106/* Default TX control flags: use 802.11 headers and request interrupt for
107 * failed transmits. Frames that request ACK callback, will add
108 * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
109 */
110#define HFA384X_TX_CTRL_FLAGS \
111 (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
112
113
114/* ca. 1 usec */
115#define HFA384X_CMD_BUSY_TIMEOUT 5000
116#define HFA384X_BAP_BUSY_TIMEOUT 50000
117
118/* ca. 10 usec */
119#define HFA384X_CMD_COMPL_TIMEOUT 20000
120#define HFA384X_DL_COMPL_TIMEOUT 1000000
121
122/* Wait times for initialization; yield to other processes to avoid busy
123 * waiting for long time. */
124#define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
125#define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
126
127
128static void prism2_hw_reset(struct net_device *dev);
129static void prism2_check_sta_fw_version(local_info_t *local);
130
131#ifdef PRISM2_DOWNLOAD_SUPPORT
132/* hostap_download.c */
133static const struct file_operations prism2_download_aux_dump_proc_fops;
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 (refcount_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 refcount_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 refcount_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 refcount_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 refcount_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 refcount_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 goto unlock;
841
842 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
843 if (res)
844 goto unlock;
845
846 if (le16_to_cpu(rec.len) == 0) {
847 /* RID not available */
848 res = -ENODATA;
849 goto unlock;
850 }
851
852 rlen = (le16_to_cpu(rec.len) - 1) * 2;
853 if (exact_len && rlen != len) {
854 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
855 "rid=0x%04x, len=%d (expected %d)\n",
856 dev->name, rid, rlen, len);
857 res = -ENODATA;
858 }
859
860 res = hfa384x_from_bap(dev, BAP0, buf, len);
861
862unlock:
863 spin_unlock_bh(&local->baplock);
864 mutex_unlock(&local->rid_bap_mtx);
865
866 if (res) {
867 if (res != -ENODATA)
868 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
869 "len=%d) - failed - res=%d\n", dev->name, rid,
870 len, res);
871 if (res == -ETIMEDOUT)
872 prism2_hw_reset(dev);
873 return res;
874 }
875
876 return rlen;
877}
878
879
880static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
881{
882 struct hostap_interface *iface;
883 local_info_t *local;
884 struct hfa384x_rid_hdr rec;
885 int res;
886
887 iface = netdev_priv(dev);
888 local = iface->local;
889
890 if (local->no_pri) {
891 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
892 "f/w\n", dev->name, rid, len);
893 return -ENOTTY; /* Well.. not really correct, but return
894 * something unique enough.. */
895 }
896
897 if ((local->func->card_present && !local->func->card_present(local)) ||
898 local->hw_downloading)
899 return -ENODEV;
900
901 rec.rid = cpu_to_le16(rid);
902 /* RID len in words and +1 for rec.rid */
903 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
904
905 res = mutex_lock_interruptible(&local->rid_bap_mtx);
906 if (res)
907 return res;
908
909 spin_lock_bh(&local->baplock);
910 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
911 if (!res)
912 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
913 if (!res)
914 res = hfa384x_to_bap(dev, BAP0, buf, len);
915 spin_unlock_bh(&local->baplock);
916
917 if (res) {
918 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
919 "failed - res=%d\n", dev->name, rid, len, res);
920 mutex_unlock(&local->rid_bap_mtx);
921 return res;
922 }
923
924 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
925 mutex_unlock(&local->rid_bap_mtx);
926
927 if (res) {
928 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
929 "failed (res=%d, rid=%04x, len=%d)\n",
930 dev->name, res, rid, len);
931
932 if (res == -ETIMEDOUT)
933 prism2_hw_reset(dev);
934 }
935
936 return res;
937}
938
939
940static void hfa384x_disable_interrupts(struct net_device *dev)
941{
942 /* disable interrupts and clear event status */
943 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
944 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
945}
946
947
948static void hfa384x_enable_interrupts(struct net_device *dev)
949{
950 /* ack pending events and enable interrupts from selected events */
951 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
952 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
953}
954
955
956static void hfa384x_events_no_bap0(struct net_device *dev)
957{
958 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
959 HFA384X_INTEN_OFF);
960}
961
962
963static void hfa384x_events_all(struct net_device *dev)
964{
965 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
966}
967
968
969static void hfa384x_events_only_cmd(struct net_device *dev)
970{
971 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
972}
973
974
975static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
976{
977 u16 fid;
978 unsigned long delay;
979
980 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
981 * below would be handled like CmdCompl event (sleep here, wake up from
982 * interrupt handler */
983 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
984 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
985 dev->name, len);
986 return 0xffff;
987 }
988
989 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
990 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
991 time_before(jiffies, delay))
992 yield();
993 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
994 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
995 return 0xffff;
996 }
997
998 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
999 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1000
1001 return fid;
1002}
1003
1004
1005static int prism2_reset_port(struct net_device *dev)
1006{
1007 struct hostap_interface *iface;
1008 local_info_t *local;
1009 int res;
1010
1011 iface = netdev_priv(dev);
1012 local = iface->local;
1013
1014 if (!local->dev_enabled)
1015 return 0;
1016
1017 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1018 NULL, NULL);
1019 if (res)
1020 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1021 dev->name);
1022 else {
1023 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1024 NULL, NULL);
1025 if (res)
1026 printk(KERN_DEBUG "%s: reset port failed to enable "
1027 "port\n", dev->name);
1028 }
1029
1030 /* It looks like at least some STA firmware versions reset
1031 * fragmentation threshold back to 2346 after enable command. Restore
1032 * the configured value, if it differs from this default. */
1033 if (local->fragm_threshold != 2346 &&
1034 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1035 local->fragm_threshold)) {
1036 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1037 "threshold (%d) after Port0 enable\n",
1038 dev->name, local->fragm_threshold);
1039 }
1040
1041 /* Some firmwares lose antenna selection settings on reset */
1042 (void) hostap_set_antsel(local);
1043
1044 return res;
1045}
1046
1047
1048static int prism2_get_version_info(struct net_device *dev, u16 rid,
1049 const char *txt)
1050{
1051 struct hfa384x_comp_ident comp;
1052 struct hostap_interface *iface;
1053 local_info_t *local;
1054
1055 iface = netdev_priv(dev);
1056 local = iface->local;
1057
1058 if (local->no_pri) {
1059 /* PRI f/w not yet available - cannot read RIDs */
1060 return -1;
1061 }
1062 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1063 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1064 return -1;
1065 }
1066
1067 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1068 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1069 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1070 return 0;
1071}
1072
1073
1074static int prism2_setup_rids(struct net_device *dev)
1075{
1076 struct hostap_interface *iface;
1077 local_info_t *local;
1078 __le16 tmp;
1079 int ret = 0;
1080
1081 iface = netdev_priv(dev);
1082 local = iface->local;
1083
1084 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1085
1086 if (!local->fw_ap) {
1087 u16 tmp1 = hostap_get_porttype(local);
1088 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1089 if (ret) {
1090 printk("%s: Port type setting to %d failed\n",
1091 dev->name, tmp1);
1092 goto fail;
1093 }
1094 }
1095
1096 /* Setting SSID to empty string seems to kill the card in Host AP mode
1097 */
1098 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1099 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1100 local->essid);
1101 if (ret) {
1102 printk("%s: AP own SSID setting failed\n", dev->name);
1103 goto fail;
1104 }
1105 }
1106
1107 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1108 PRISM2_DATA_MAXLEN);
1109 if (ret) {
1110 printk("%s: MAC data length setting to %d failed\n",
1111 dev->name, PRISM2_DATA_MAXLEN);
1112 goto fail;
1113 }
1114
1115 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1116 printk("%s: Channel list read failed\n", dev->name);
1117 ret = -EINVAL;
1118 goto fail;
1119 }
1120 local->channel_mask = le16_to_cpu(tmp);
1121
1122 if (local->channel < 1 || local->channel > 14 ||
1123 !(local->channel_mask & (1 << (local->channel - 1)))) {
1124 printk(KERN_WARNING "%s: Channel setting out of range "
1125 "(%d)!\n", dev->name, local->channel);
1126 ret = -EBUSY;
1127 goto fail;
1128 }
1129
1130 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1131 if (ret) {
1132 printk("%s: Channel setting to %d failed\n",
1133 dev->name, local->channel);
1134 goto fail;
1135 }
1136
1137 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1138 local->beacon_int);
1139 if (ret) {
1140 printk("%s: Beacon interval setting to %d failed\n",
1141 dev->name, local->beacon_int);
1142 /* this may fail with Symbol/Lucent firmware */
1143 if (ret == -ETIMEDOUT)
1144 goto fail;
1145 }
1146
1147 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1148 local->dtim_period);
1149 if (ret) {
1150 printk("%s: DTIM period setting to %d failed\n",
1151 dev->name, local->dtim_period);
1152 /* this may fail with Symbol/Lucent firmware */
1153 if (ret == -ETIMEDOUT)
1154 goto fail;
1155 }
1156
1157 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1158 local->is_promisc);
1159 if (ret)
1160 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1161 dev->name, local->is_promisc);
1162
1163 if (!local->fw_ap) {
1164 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1165 local->essid);
1166 if (ret) {
1167 printk("%s: Desired SSID setting failed\n", dev->name);
1168 goto fail;
1169 }
1170 }
1171
1172 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1173 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1174 * rates */
1175 if (local->tx_rate_control == 0) {
1176 local->tx_rate_control =
1177 HFA384X_RATES_1MBPS |
1178 HFA384X_RATES_2MBPS |
1179 HFA384X_RATES_5MBPS |
1180 HFA384X_RATES_11MBPS;
1181 }
1182 if (local->basic_rates == 0)
1183 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1184
1185 if (!local->fw_ap) {
1186 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1187 local->tx_rate_control);
1188 if (ret) {
1189 printk("%s: TXRateControl setting to %d failed\n",
1190 dev->name, local->tx_rate_control);
1191 goto fail;
1192 }
1193
1194 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1195 local->tx_rate_control);
1196 if (ret) {
1197 printk("%s: cnfSupportedRates setting to %d failed\n",
1198 dev->name, local->tx_rate_control);
1199 }
1200
1201 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1202 local->basic_rates);
1203 if (ret) {
1204 printk("%s: cnfBasicRates setting to %d failed\n",
1205 dev->name, local->basic_rates);
1206 }
1207
1208 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1209 if (ret) {
1210 printk("%s: Create IBSS setting to 1 failed\n",
1211 dev->name);
1212 }
1213 }
1214
1215 if (local->name_set)
1216 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1217 local->name);
1218
1219 if (hostap_set_encryption(local)) {
1220 printk(KERN_INFO "%s: could not configure encryption\n",
1221 dev->name);
1222 }
1223
1224 (void) hostap_set_antsel(local);
1225
1226 if (hostap_set_roaming(local)) {
1227 printk(KERN_INFO "%s: could not set host roaming\n",
1228 dev->name);
1229 }
1230
1231 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1232 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1233 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1234 dev->name, local->enh_sec);
1235
1236 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1237 * not working correctly (last seven counters report bogus values).
1238 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1239 * beginning with that firmware version. Another bug fix for 32-bit
1240 * tallies in 1.4.0; should 16-bit tallies be used for some other
1241 * versions, too? */
1242 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1243 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1244 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1245 "failed\n", dev->name);
1246 local->tallies32 = 0;
1247 } else
1248 local->tallies32 = 1;
1249 } else
1250 local->tallies32 = 0;
1251
1252 hostap_set_auth_algs(local);
1253
1254 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1255 local->fragm_threshold)) {
1256 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1257 "failed\n", dev->name, local->fragm_threshold);
1258 }
1259
1260 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1261 local->rts_threshold)) {
1262 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1263 dev->name, local->rts_threshold);
1264 }
1265
1266 if (local->manual_retry_count >= 0 &&
1267 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1268 local->manual_retry_count)) {
1269 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1270 dev->name, local->manual_retry_count);
1271 }
1272
1273 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1274 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1275 local->rssi_to_dBm = le16_to_cpu(tmp);
1276 }
1277
1278 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1279 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1280 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1281 dev->name);
1282 }
1283
1284 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1285 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1286 local->generic_elem, local->generic_elem_len)) {
1287 printk(KERN_INFO "%s: setting genericElement failed\n",
1288 dev->name);
1289 }
1290
1291 fail:
1292 return ret;
1293}
1294
1295
1296static int prism2_hw_init(struct net_device *dev, int initial)
1297{
1298 struct hostap_interface *iface;
1299 local_info_t *local;
1300 int ret, first = 1;
1301 unsigned long start, delay;
1302
1303 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1304
1305 iface = netdev_priv(dev);
1306 local = iface->local;
1307
1308 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1309
1310 init:
1311 /* initialize HFA 384x */
1312 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1313 if (ret) {
1314 printk(KERN_INFO "%s: first command failed - assuming card "
1315 "does not have primary firmware\n", dev_info);
1316 }
1317
1318 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1319 /* EvStat has Cmd bit set in some cases, so retry once if no
1320 * wait was needed */
1321 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1322 printk(KERN_DEBUG "%s: init command completed too quickly - "
1323 "retrying\n", dev->name);
1324 first = 0;
1325 goto init;
1326 }
1327
1328 start = jiffies;
1329 delay = jiffies + HFA384X_INIT_TIMEOUT;
1330 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1331 time_before(jiffies, delay))
1332 yield();
1333 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1334 printk(KERN_DEBUG "%s: assuming no Primary image in "
1335 "flash - card initialization not completed\n",
1336 dev_info);
1337 local->no_pri = 1;
1338#ifdef PRISM2_DOWNLOAD_SUPPORT
1339 if (local->sram_type == -1)
1340 local->sram_type = prism2_get_ram_size(local);
1341#endif /* PRISM2_DOWNLOAD_SUPPORT */
1342 return 1;
1343 }
1344 local->no_pri = 0;
1345 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1346 (jiffies - start) * 1000 / HZ);
1347 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1348 return 0;
1349}
1350
1351
1352static int prism2_hw_init2(struct net_device *dev, int initial)
1353{
1354 struct hostap_interface *iface;
1355 local_info_t *local;
1356 int i;
1357
1358 iface = netdev_priv(dev);
1359 local = iface->local;
1360
1361#ifdef PRISM2_DOWNLOAD_SUPPORT
1362 kfree(local->pda);
1363 if (local->no_pri)
1364 local->pda = NULL;
1365 else
1366 local->pda = prism2_read_pda(dev);
1367#endif /* PRISM2_DOWNLOAD_SUPPORT */
1368
1369 hfa384x_disable_interrupts(dev);
1370
1371#ifndef final_version
1372 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1373 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1374 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1375 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1376 goto failed;
1377 }
1378#endif
1379
1380 if (initial || local->pri_only) {
1381 hfa384x_events_only_cmd(dev);
1382 /* get card version information */
1383 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1384 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1385 hfa384x_disable_interrupts(dev);
1386 goto failed;
1387 }
1388
1389 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1390 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1391 "- only Primary f/w present\n", dev->name);
1392 local->pri_only = 1;
1393 return 0;
1394 }
1395 local->pri_only = 0;
1396 hfa384x_disable_interrupts(dev);
1397 }
1398
1399 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1400 * enable interrupts before this. This would also require some sort of
1401 * sleeping AllocEv waiting */
1402
1403 /* allocate TX FIDs */
1404 local->txfid_len = PRISM2_TXFID_LEN;
1405 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1406 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1407 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1408 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1409 if (local->txfid[i] != 0xffff) {
1410 printk(KERN_DEBUG "%s: Using shorter TX FID "
1411 "(1600 bytes)\n", dev->name);
1412 local->txfid_len = 1600;
1413 }
1414 }
1415 if (local->txfid[i] == 0xffff)
1416 goto failed;
1417 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1418 }
1419
1420 hfa384x_events_only_cmd(dev);
1421
1422 if (initial) {
1423 struct list_head *ptr;
1424 prism2_check_sta_fw_version(local);
1425
1426 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1427 dev->dev_addr, 6, 1) < 0) {
1428 printk("%s: could not get own MAC address\n",
1429 dev->name);
1430 }
1431 list_for_each(ptr, &local->hostap_interfaces) {
1432 iface = list_entry(ptr, struct hostap_interface, list);
1433 eth_hw_addr_inherit(iface->dev, dev);
1434 }
1435 } else if (local->fw_ap)
1436 prism2_check_sta_fw_version(local);
1437
1438 prism2_setup_rids(dev);
1439
1440 /* MAC is now configured, but port 0 is not yet enabled */
1441 return 0;
1442
1443 failed:
1444 if (!local->no_pri)
1445 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1446 return 1;
1447}
1448
1449
1450static int prism2_hw_enable(struct net_device *dev, int initial)
1451{
1452 struct hostap_interface *iface;
1453 local_info_t *local;
1454 int was_resetting;
1455
1456 iface = netdev_priv(dev);
1457 local = iface->local;
1458 was_resetting = local->hw_resetting;
1459
1460 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1461 printk("%s: MAC port 0 enabling failed\n", dev->name);
1462 return 1;
1463 }
1464
1465 local->hw_ready = 1;
1466 local->hw_reset_tries = 0;
1467 local->hw_resetting = 0;
1468 hfa384x_enable_interrupts(dev);
1469
1470 /* at least D-Link DWL-650 seems to require additional port reset
1471 * before it starts acting as an AP, so reset port automatically
1472 * here just in case */
1473 if (initial && prism2_reset_port(dev)) {
1474 printk("%s: MAC port 0 resetting failed\n", dev->name);
1475 return 1;
1476 }
1477
1478 if (was_resetting && netif_queue_stopped(dev)) {
1479 /* If hw_reset() was called during pending transmit, netif
1480 * queue was stopped. Wake it up now since the wlan card has
1481 * been resetted. */
1482 netif_wake_queue(dev);
1483 }
1484
1485 return 0;
1486}
1487
1488
1489static int prism2_hw_config(struct net_device *dev, int initial)
1490{
1491 struct hostap_interface *iface;
1492 local_info_t *local;
1493
1494 iface = netdev_priv(dev);
1495 local = iface->local;
1496
1497 if (local->hw_downloading)
1498 return 1;
1499
1500 if (prism2_hw_init(dev, initial)) {
1501 return local->no_pri ? 0 : 1;
1502 }
1503
1504 if (prism2_hw_init2(dev, initial))
1505 return 1;
1506
1507 /* Enable firmware if secondary image is loaded and at least one of the
1508 * netdevices is up. */
1509 if (!local->pri_only &&
1510 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1511 if (!local->dev_enabled)
1512 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1513 local->dev_enabled = 1;
1514 return prism2_hw_enable(dev, initial);
1515 }
1516
1517 return 0;
1518}
1519
1520
1521static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1522{
1523 struct hostap_interface *iface;
1524 local_info_t *local;
1525
1526 iface = netdev_priv(dev);
1527 local = iface->local;
1528
1529 /* Allow only command completion events during disable */
1530 hfa384x_events_only_cmd(dev);
1531
1532 local->hw_ready = 0;
1533 if (local->dev_enabled)
1534 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1535 local->dev_enabled = 0;
1536
1537 if (local->func->card_present && !local->func->card_present(local)) {
1538 printk(KERN_DEBUG "%s: card already removed or not configured "
1539 "during shutdown\n", dev->name);
1540 return;
1541 }
1542
1543 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1544 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1545 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1546
1547 hfa384x_disable_interrupts(dev);
1548
1549 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1550 hfa384x_events_only_cmd(dev);
1551 else
1552 prism2_clear_cmd_queue(local);
1553}
1554
1555
1556static void prism2_hw_reset(struct net_device *dev)
1557{
1558 struct hostap_interface *iface;
1559 local_info_t *local;
1560
1561#if 0
1562 static long last_reset = 0;
1563
1564 /* do not reset card more than once per second to avoid ending up in a
1565 * busy loop resetting the card */
1566 if (time_before_eq(jiffies, last_reset + HZ))
1567 return;
1568 last_reset = jiffies;
1569#endif
1570
1571 iface = netdev_priv(dev);
1572 local = iface->local;
1573
1574 if (in_interrupt()) {
1575 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1576 "in interrupt context\n", dev->name);
1577 return;
1578 }
1579
1580 if (local->hw_downloading)
1581 return;
1582
1583 if (local->hw_resetting) {
1584 printk(KERN_WARNING "%s: %s: already resetting card - "
1585 "ignoring reset request\n", dev_info, dev->name);
1586 return;
1587 }
1588
1589 local->hw_reset_tries++;
1590 if (local->hw_reset_tries > 10) {
1591 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1592 dev->name);
1593 return;
1594 }
1595
1596 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1597 hfa384x_disable_interrupts(dev);
1598 local->hw_resetting = 1;
1599 if (local->func->cor_sreset) {
1600 /* Host system seems to hang in some cases with high traffic
1601 * load or shared interrupts during COR sreset. Disable shared
1602 * interrupts during reset to avoid these crashes. COS sreset
1603 * takes quite a long time, so it is unfortunate that this
1604 * seems to be needed. Anyway, I do not know of any better way
1605 * of avoiding the crash. */
1606 disable_irq(dev->irq);
1607 local->func->cor_sreset(local);
1608 enable_irq(dev->irq);
1609 }
1610 prism2_hw_shutdown(dev, 1);
1611 prism2_hw_config(dev, 0);
1612 local->hw_resetting = 0;
1613
1614#ifdef PRISM2_DOWNLOAD_SUPPORT
1615 if (local->dl_pri) {
1616 printk(KERN_DEBUG "%s: persistent download of primary "
1617 "firmware\n", dev->name);
1618 if (prism2_download_genesis(local, local->dl_pri) < 0)
1619 printk(KERN_WARNING "%s: download (PRI) failed\n",
1620 dev->name);
1621 }
1622
1623 if (local->dl_sec) {
1624 printk(KERN_DEBUG "%s: persistent download of secondary "
1625 "firmware\n", dev->name);
1626 if (prism2_download_volatile(local, local->dl_sec) < 0)
1627 printk(KERN_WARNING "%s: download (SEC) failed\n",
1628 dev->name);
1629 }
1630#endif /* PRISM2_DOWNLOAD_SUPPORT */
1631
1632 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1633}
1634
1635
1636static void prism2_schedule_reset(local_info_t *local)
1637{
1638 schedule_work(&local->reset_queue);
1639}
1640
1641
1642/* Called only as scheduled task after noticing card timeout in interrupt
1643 * context */
1644static void handle_reset_queue(struct work_struct *work)
1645{
1646 local_info_t *local = container_of(work, local_info_t, reset_queue);
1647
1648 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1649 prism2_hw_reset(local->dev);
1650
1651 if (netif_queue_stopped(local->dev)) {
1652 int i;
1653
1654 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1655 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1656 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1657 "wake up queue\n");
1658 netif_wake_queue(local->dev);
1659 break;
1660 }
1661 }
1662}
1663
1664
1665static int prism2_get_txfid_idx(local_info_t *local)
1666{
1667 int idx, end;
1668 unsigned long flags;
1669
1670 spin_lock_irqsave(&local->txfidlock, flags);
1671 end = idx = local->next_txfid;
1672 do {
1673 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1674 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1675 spin_unlock_irqrestore(&local->txfidlock, flags);
1676 return idx;
1677 }
1678 idx++;
1679 if (idx >= PRISM2_TXFID_COUNT)
1680 idx = 0;
1681 } while (idx != end);
1682 spin_unlock_irqrestore(&local->txfidlock, flags);
1683
1684 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1685 "packet dropped\n");
1686 local->dev->stats.tx_dropped++;
1687
1688 return -1;
1689}
1690
1691
1692/* Called only from hardware IRQ */
1693static void prism2_transmit_cb(struct net_device *dev, long context,
1694 u16 resp0, u16 res)
1695{
1696 struct hostap_interface *iface;
1697 local_info_t *local;
1698 int idx = (int) context;
1699
1700 iface = netdev_priv(dev);
1701 local = iface->local;
1702
1703 if (res) {
1704 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1705 dev->name, res);
1706 return;
1707 }
1708
1709 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1710 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1711 "idx=%d\n", dev->name, idx);
1712 return;
1713 }
1714
1715 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1716 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1717 "with no pending transmit\n", dev->name);
1718 }
1719
1720 if (netif_queue_stopped(dev)) {
1721 /* ready for next TX, so wake up queue that was stopped in
1722 * prism2_transmit() */
1723 netif_wake_queue(dev);
1724 }
1725
1726 spin_lock(&local->txfidlock);
1727
1728 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1729 * will be automatically allocated for the next TX frame */
1730 local->intransmitfid[idx] = resp0;
1731
1732 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1733 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1734 dev->name, idx, local->txfid[idx],
1735 resp0, local->intransmitfid[local->next_txfid]);
1736
1737 idx++;
1738 if (idx >= PRISM2_TXFID_COUNT)
1739 idx = 0;
1740 local->next_txfid = idx;
1741
1742 /* check if all TX buffers are occupied */
1743 do {
1744 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1745 spin_unlock(&local->txfidlock);
1746 return;
1747 }
1748 idx++;
1749 if (idx >= PRISM2_TXFID_COUNT)
1750 idx = 0;
1751 } while (idx != local->next_txfid);
1752 spin_unlock(&local->txfidlock);
1753
1754 /* no empty TX buffers, stop queue */
1755 netif_stop_queue(dev);
1756}
1757
1758
1759/* Called only from software IRQ if PCI bus master is not used (with bus master
1760 * this can be called both from software and hardware IRQ) */
1761static int prism2_transmit(struct net_device *dev, int idx)
1762{
1763 struct hostap_interface *iface;
1764 local_info_t *local;
1765 int res;
1766
1767 iface = netdev_priv(dev);
1768 local = iface->local;
1769
1770 /* The driver tries to stop netif queue so that there would not be
1771 * more than one attempt to transmit frames going on; check that this
1772 * is really the case */
1773
1774 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1775 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1776 "when previous TX was pending\n", dev->name);
1777 return -1;
1778 }
1779
1780 /* stop the queue for the time that transmit is pending */
1781 netif_stop_queue(dev);
1782
1783 /* transmit packet */
1784 res = hfa384x_cmd_callback(
1785 dev,
1786 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1787 local->txfid[idx],
1788 prism2_transmit_cb, (long) idx);
1789
1790 if (res) {
1791 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1792 "failed (res=%d)\n", dev->name, res);
1793 dev->stats.tx_dropped++;
1794 netif_wake_queue(dev);
1795 return -1;
1796 }
1797 netif_trans_update(dev);
1798
1799 /* Since we did not wait for command completion, the card continues
1800 * to process on the background and we will finish handling when
1801 * command completion event is handled (prism2_cmd_ev() function) */
1802
1803 return 0;
1804}
1805
1806
1807/* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1808 * send the payload with this descriptor) */
1809/* Called only from software IRQ */
1810static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1811{
1812 struct hostap_interface *iface;
1813 local_info_t *local;
1814 struct hfa384x_tx_frame txdesc;
1815 struct hostap_skb_tx_data *meta;
1816 int hdr_len, data_len, idx, res, ret = -1;
1817 u16 tx_control, fc;
1818
1819 iface = netdev_priv(dev);
1820 local = iface->local;
1821
1822 meta = (struct hostap_skb_tx_data *) skb->cb;
1823
1824 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1825
1826 if ((local->func->card_present && !local->func->card_present(local)) ||
1827 !local->hw_ready || local->hw_downloading || local->pri_only) {
1828 if (net_ratelimit()) {
1829 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1830 " skipping\n", dev->name);
1831 }
1832 goto fail;
1833 }
1834
1835 memset(&txdesc, 0, sizeof(txdesc));
1836
1837 /* skb->data starts with txdesc->frame_control */
1838 hdr_len = 24;
1839 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1840 fc = le16_to_cpu(txdesc.frame_control);
1841 if (ieee80211_is_data(txdesc.frame_control) &&
1842 ieee80211_has_a4(txdesc.frame_control) &&
1843 skb->len >= 30) {
1844 /* Addr4 */
1845 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1846 ETH_ALEN);
1847 hdr_len += ETH_ALEN;
1848 }
1849
1850 tx_control = local->tx_control;
1851 if (meta->tx_cb_idx) {
1852 tx_control |= HFA384X_TX_CTRL_TX_OK;
1853 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1854 }
1855 txdesc.tx_control = cpu_to_le16(tx_control);
1856 txdesc.tx_rate = meta->rate;
1857
1858 data_len = skb->len - hdr_len;
1859 txdesc.data_len = cpu_to_le16(data_len);
1860 txdesc.len = cpu_to_be16(data_len);
1861
1862 idx = prism2_get_txfid_idx(local);
1863 if (idx < 0)
1864 goto fail;
1865
1866 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1867 hostap_dump_tx_header(dev->name, &txdesc);
1868
1869 spin_lock(&local->baplock);
1870 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1871
1872 if (!res)
1873 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1874 if (!res)
1875 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1876 skb->len - hdr_len);
1877 spin_unlock(&local->baplock);
1878
1879 if (!res)
1880 res = prism2_transmit(dev, idx);
1881 if (res) {
1882 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1883 dev->name);
1884 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1885 schedule_work(&local->reset_queue);
1886 goto fail;
1887 }
1888
1889 ret = 0;
1890
1891fail:
1892 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1893 return ret;
1894}
1895
1896
1897/* Some SMP systems have reported number of odd errors with hostap_pci. fid
1898 * register has changed values between consecutive reads for an unknown reason.
1899 * This should really not happen, so more debugging is needed. This test
1900 * version is a bit slower, but it will detect most of such register changes
1901 * and will try to get the correct fid eventually. */
1902#define EXTRA_FID_READ_TESTS
1903
1904static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1905{
1906#ifdef EXTRA_FID_READ_TESTS
1907 u16 val, val2, val3;
1908 int i;
1909
1910 for (i = 0; i < 10; i++) {
1911 val = HFA384X_INW(reg);
1912 val2 = HFA384X_INW(reg);
1913 val3 = HFA384X_INW(reg);
1914
1915 if (val == val2 && val == val3)
1916 return val;
1917
1918 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1919 " %04x %04x %04x\n",
1920 dev->name, i, reg, val, val2, val3);
1921 if ((val == val2 || val == val3) && val != 0)
1922 return val;
1923 if (val2 == val3 && val2 != 0)
1924 return val2;
1925 }
1926 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1927 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1928 return val;
1929#else /* EXTRA_FID_READ_TESTS */
1930 return HFA384X_INW(reg);
1931#endif /* EXTRA_FID_READ_TESTS */
1932}
1933
1934
1935/* Called only as a tasklet (software IRQ) */
1936static void prism2_rx(local_info_t *local)
1937{
1938 struct net_device *dev = local->dev;
1939 int res, rx_pending = 0;
1940 u16 len, hdr_len, rxfid, status, macport;
1941 struct hfa384x_rx_frame rxdesc;
1942 struct sk_buff *skb = NULL;
1943
1944 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1945
1946 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1947#ifndef final_version
1948 if (rxfid == 0) {
1949 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1950 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1951 rxfid);
1952 if (rxfid == 0) {
1953 schedule_work(&local->reset_queue);
1954 goto rx_dropped;
1955 }
1956 /* try to continue with the new rxfid value */
1957 }
1958#endif
1959
1960 spin_lock(&local->baplock);
1961 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1962 if (!res)
1963 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1964
1965 if (res) {
1966 spin_unlock(&local->baplock);
1967 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1968 res);
1969 if (res == -ETIMEDOUT) {
1970 schedule_work(&local->reset_queue);
1971 }
1972 goto rx_dropped;
1973 }
1974
1975 len = le16_to_cpu(rxdesc.data_len);
1976 hdr_len = sizeof(rxdesc);
1977 status = le16_to_cpu(rxdesc.status);
1978 macport = (status >> 8) & 0x07;
1979
1980 /* Drop frames with too large reported payload length. Monitor mode
1981 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1982 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1983 * macport 7 */
1984 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1985 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1986 if (len >= (u16) -14) {
1987 hdr_len -= 65535 - len;
1988 hdr_len--;
1989 }
1990 len = 0;
1991 } else {
1992 spin_unlock(&local->baplock);
1993 printk(KERN_DEBUG "%s: Received frame with invalid "
1994 "length 0x%04x\n", dev->name, len);
1995 hostap_dump_rx_header(dev->name, &rxdesc);
1996 goto rx_dropped;
1997 }
1998 }
1999
2000 skb = dev_alloc_skb(len + hdr_len);
2001 if (!skb) {
2002 spin_unlock(&local->baplock);
2003 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2004 dev->name);
2005 goto rx_dropped;
2006 }
2007 skb->dev = dev;
2008 skb_put_data(skb, &rxdesc, hdr_len);
2009
2010 if (len > 0)
2011 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2012 spin_unlock(&local->baplock);
2013 if (res) {
2014 printk(KERN_DEBUG "%s: RX failed to read "
2015 "frame data\n", dev->name);
2016 goto rx_dropped;
2017 }
2018
2019 skb_queue_tail(&local->rx_list, skb);
2020 tasklet_schedule(&local->rx_tasklet);
2021
2022 rx_exit:
2023 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2024 if (!rx_pending) {
2025 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2026 }
2027
2028 return;
2029
2030 rx_dropped:
2031 dev->stats.rx_dropped++;
2032 if (skb)
2033 dev_kfree_skb(skb);
2034 goto rx_exit;
2035}
2036
2037
2038/* Called only as a tasklet (software IRQ) */
2039static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2040{
2041 struct hfa384x_rx_frame *rxdesc;
2042 struct net_device *dev = skb->dev;
2043 struct hostap_80211_rx_status stats;
2044 int hdrlen, rx_hdrlen;
2045
2046 rx_hdrlen = sizeof(*rxdesc);
2047 if (skb->len < sizeof(*rxdesc)) {
2048 /* Allow monitor mode to receive shorter frames */
2049 if (local->iw_mode == IW_MODE_MONITOR &&
2050 skb->len >= sizeof(*rxdesc) - 30) {
2051 rx_hdrlen = skb->len;
2052 } else {
2053 dev_kfree_skb(skb);
2054 return;
2055 }
2056 }
2057
2058 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2059
2060 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2061 skb->len >= sizeof(*rxdesc))
2062 hostap_dump_rx_header(dev->name, rxdesc);
2063
2064 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2065 (!local->monitor_allow_fcserr ||
2066 local->iw_mode != IW_MODE_MONITOR))
2067 goto drop;
2068
2069 if (skb->len > PRISM2_DATA_MAXLEN) {
2070 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2071 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2072 goto drop;
2073 }
2074
2075 stats.mac_time = le32_to_cpu(rxdesc->time);
2076 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2077 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2078 stats.rate = rxdesc->rate;
2079
2080 /* Convert Prism2 RX structure into IEEE 802.11 header */
2081 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2082 if (hdrlen > rx_hdrlen)
2083 hdrlen = rx_hdrlen;
2084
2085 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2086 &rxdesc->frame_control, hdrlen);
2087
2088 hostap_80211_rx(dev, skb, &stats);
2089 return;
2090
2091 drop:
2092 dev_kfree_skb(skb);
2093}
2094
2095
2096/* Called only as a tasklet (software IRQ) */
2097static void hostap_rx_tasklet(unsigned long data)
2098{
2099 local_info_t *local = (local_info_t *) data;
2100 struct sk_buff *skb;
2101
2102 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2103 hostap_rx_skb(local, skb);
2104}
2105
2106
2107/* Called only from hardware IRQ */
2108static void prism2_alloc_ev(struct net_device *dev)
2109{
2110 struct hostap_interface *iface;
2111 local_info_t *local;
2112 int idx;
2113 u16 fid;
2114
2115 iface = netdev_priv(dev);
2116 local = iface->local;
2117
2118 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2119
2120 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2121
2122 spin_lock(&local->txfidlock);
2123 idx = local->next_alloc;
2124
2125 do {
2126 if (local->txfid[idx] == fid) {
2127 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2128 idx);
2129
2130#ifndef final_version
2131 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2132 printk("Already released txfid found at idx "
2133 "%d\n", idx);
2134 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2135 printk("Already reserved txfid found at idx "
2136 "%d\n", idx);
2137#endif
2138 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2139 idx++;
2140 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2141 idx;
2142
2143 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2144 netif_queue_stopped(dev))
2145 netif_wake_queue(dev);
2146
2147 spin_unlock(&local->txfidlock);
2148 return;
2149 }
2150
2151 idx++;
2152 if (idx >= PRISM2_TXFID_COUNT)
2153 idx = 0;
2154 } while (idx != local->next_alloc);
2155
2156 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2157 "read 0x%04x) for alloc event\n", dev->name, fid,
2158 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2159 printk(KERN_DEBUG "TXFIDs:");
2160 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2161 printk(" %04x[%04x]", local->txfid[idx],
2162 local->intransmitfid[idx]);
2163 printk("\n");
2164 spin_unlock(&local->txfidlock);
2165
2166 /* FIX: should probably schedule reset; reference to one txfid was lost
2167 * completely.. Bad things will happen if we run out of txfids
2168 * Actually, this will cause netdev watchdog to notice TX timeout and
2169 * then card reset after all txfids have been leaked. */
2170}
2171
2172
2173/* Called only as a tasklet (software IRQ) */
2174static void hostap_tx_callback(local_info_t *local,
2175 struct hfa384x_tx_frame *txdesc, int ok,
2176 char *payload)
2177{
2178 u16 sw_support, hdrlen, len;
2179 struct sk_buff *skb;
2180 struct hostap_tx_callback_info *cb;
2181
2182 /* Make sure that frame was from us. */
2183 if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2184 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2185 local->dev->name);
2186 return;
2187 }
2188
2189 sw_support = le32_to_cpu(txdesc->sw_support);
2190
2191 spin_lock(&local->lock);
2192 cb = local->tx_callback;
2193 while (cb != NULL && cb->idx != sw_support)
2194 cb = cb->next;
2195 spin_unlock(&local->lock);
2196
2197 if (cb == NULL) {
2198 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2199 local->dev->name, sw_support);
2200 return;
2201 }
2202
2203 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2204 len = le16_to_cpu(txdesc->data_len);
2205 skb = dev_alloc_skb(hdrlen + len);
2206 if (skb == NULL) {
2207 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2208 "skb\n", local->dev->name);
2209 return;
2210 }
2211
2212 skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2213 if (payload)
2214 skb_put_data(skb, payload, len);
2215
2216 skb->dev = local->dev;
2217 skb_reset_mac_header(skb);
2218
2219 cb->func(skb, ok, cb->data);
2220}
2221
2222
2223/* Called only as a tasklet (software IRQ) */
2224static int hostap_tx_compl_read(local_info_t *local, int error,
2225 struct hfa384x_tx_frame *txdesc,
2226 char **payload)
2227{
2228 u16 fid, len;
2229 int res, ret = 0;
2230 struct net_device *dev = local->dev;
2231
2232 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2233
2234 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2235
2236 spin_lock(&local->baplock);
2237 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2238 if (!res)
2239 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2240 if (res) {
2241 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2242 "read txdesc\n", dev->name, error, fid);
2243 if (res == -ETIMEDOUT) {
2244 schedule_work(&local->reset_queue);
2245 }
2246 ret = -1;
2247 goto fail;
2248 }
2249 if (txdesc->sw_support) {
2250 len = le16_to_cpu(txdesc->data_len);
2251 if (len < PRISM2_DATA_MAXLEN) {
2252 *payload = kmalloc(len, GFP_ATOMIC);
2253 if (*payload == NULL ||
2254 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2255 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2256 "frame payload\n", dev->name);
2257 kfree(*payload);
2258 *payload = NULL;
2259 ret = -1;
2260 goto fail;
2261 }
2262 }
2263 }
2264
2265 fail:
2266 spin_unlock(&local->baplock);
2267
2268 return ret;
2269}
2270
2271
2272/* Called only as a tasklet (software IRQ) */
2273static void prism2_tx_ev(local_info_t *local)
2274{
2275 struct net_device *dev = local->dev;
2276 char *payload = NULL;
2277 struct hfa384x_tx_frame txdesc;
2278
2279 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2280 goto fail;
2281
2282 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2283 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2284 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2285 "duration_id=%d\n",
2286 dev->name, le16_to_cpu(txdesc.status),
2287 txdesc.retry_count, txdesc.tx_rate,
2288 le16_to_cpu(txdesc.seq_ctrl),
2289 le16_to_cpu(txdesc.duration_id));
2290 }
2291
2292 if (txdesc.sw_support)
2293 hostap_tx_callback(local, &txdesc, 1, payload);
2294 kfree(payload);
2295
2296 fail:
2297 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2298}
2299
2300
2301/* Called only as a tasklet (software IRQ) */
2302static void hostap_sta_tx_exc_tasklet(unsigned long data)
2303{
2304 local_info_t *local = (local_info_t *) data;
2305 struct sk_buff *skb;
2306
2307 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2308 struct hfa384x_tx_frame *txdesc =
2309 (struct hfa384x_tx_frame *) skb->data;
2310
2311 if (skb->len >= sizeof(*txdesc)) {
2312 /* Convert Prism2 RX structure into IEEE 802.11 header
2313 */
2314 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2315 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2316 &txdesc->frame_control, hdrlen);
2317
2318 hostap_handle_sta_tx_exc(local, skb);
2319 }
2320 dev_kfree_skb(skb);
2321 }
2322}
2323
2324
2325/* Called only as a tasklet (software IRQ) */
2326static void prism2_txexc(local_info_t *local)
2327{
2328 struct net_device *dev = local->dev;
2329 u16 status, fc;
2330 int show_dump, res;
2331 char *payload = NULL;
2332 struct hfa384x_tx_frame txdesc;
2333
2334 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2335 dev->stats.tx_errors++;
2336
2337 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2338 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2339 if (res)
2340 return;
2341
2342 status = le16_to_cpu(txdesc.status);
2343
2344 /* We produce a TXDROP event only for retry or lifetime
2345 * exceeded, because that's the only status that really mean
2346 * that this particular node went away.
2347 * Other errors means that *we* screwed up. - Jean II */
2348 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2349 {
2350 union iwreq_data wrqu;
2351
2352 /* Copy 802.11 dest address. */
2353 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2354 wrqu.addr.sa_family = ARPHRD_ETHER;
2355 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2356 } else
2357 show_dump = 1;
2358
2359 if (local->iw_mode == IW_MODE_MASTER ||
2360 local->iw_mode == IW_MODE_REPEAT ||
2361 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2362 struct sk_buff *skb;
2363 skb = dev_alloc_skb(sizeof(txdesc));
2364 if (skb) {
2365 skb_put_data(skb, &txdesc, sizeof(txdesc));
2366 skb_queue_tail(&local->sta_tx_exc_list, skb);
2367 tasklet_schedule(&local->sta_tx_exc_tasklet);
2368 }
2369 }
2370
2371 if (txdesc.sw_support)
2372 hostap_tx_callback(local, &txdesc, 0, payload);
2373 kfree(payload);
2374
2375 if (!show_dump)
2376 return;
2377
2378 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2379 " tx_control=%04x\n",
2380 dev->name, status,
2381 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2382 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2383 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2384 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2385 le16_to_cpu(txdesc.tx_control));
2386
2387 fc = le16_to_cpu(txdesc.frame_control);
2388 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2389 "(%s%s%s::%d%s%s)\n",
2390 txdesc.retry_count, txdesc.tx_rate, fc,
2391 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2392 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2393 ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2394 (fc & IEEE80211_FCTL_STYPE) >> 4,
2395 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2396 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2397 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2398 txdesc.addr1, txdesc.addr2,
2399 txdesc.addr3, txdesc.addr4);
2400}
2401
2402
2403/* Called only as a tasklet (software IRQ) */
2404static void hostap_info_tasklet(unsigned long data)
2405{
2406 local_info_t *local = (local_info_t *) data;
2407 struct sk_buff *skb;
2408
2409 while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2410 hostap_info_process(local, skb);
2411 dev_kfree_skb(skb);
2412 }
2413}
2414
2415
2416/* Called only as a tasklet (software IRQ) */
2417static void prism2_info(local_info_t *local)
2418{
2419 struct net_device *dev = local->dev;
2420 u16 fid;
2421 int res, left;
2422 struct hfa384x_info_frame info;
2423 struct sk_buff *skb;
2424
2425 fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2426
2427 spin_lock(&local->baplock);
2428 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2429 if (!res)
2430 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2431 if (res) {
2432 spin_unlock(&local->baplock);
2433 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2434 fid);
2435 if (res == -ETIMEDOUT) {
2436 schedule_work(&local->reset_queue);
2437 }
2438 goto out;
2439 }
2440
2441 left = (le16_to_cpu(info.len) - 1) * 2;
2442
2443 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2444 /* data register seems to give 0x8000 in some error cases even
2445 * though busy bit is not set in offset register;
2446 * in addition, length must be at least 1 due to type field */
2447 spin_unlock(&local->baplock);
2448 printk(KERN_DEBUG "%s: Received info frame with invalid "
2449 "length 0x%04x (type 0x%04x)\n", dev->name,
2450 le16_to_cpu(info.len), le16_to_cpu(info.type));
2451 goto out;
2452 }
2453
2454 skb = dev_alloc_skb(sizeof(info) + left);
2455 if (skb == NULL) {
2456 spin_unlock(&local->baplock);
2457 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2458 "frame\n", dev->name);
2459 goto out;
2460 }
2461
2462 skb_put_data(skb, &info, sizeof(info));
2463 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2464 {
2465 spin_unlock(&local->baplock);
2466 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2467 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2468 le16_to_cpu(info.len), le16_to_cpu(info.type));
2469 dev_kfree_skb(skb);
2470 goto out;
2471 }
2472 spin_unlock(&local->baplock);
2473
2474 skb_queue_tail(&local->info_list, skb);
2475 tasklet_schedule(&local->info_tasklet);
2476
2477 out:
2478 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2479}
2480
2481
2482/* Called only as a tasklet (software IRQ) */
2483static void hostap_bap_tasklet(unsigned long data)
2484{
2485 local_info_t *local = (local_info_t *) data;
2486 struct net_device *dev = local->dev;
2487 u16 ev;
2488 int frames = 30;
2489
2490 if (local->func->card_present && !local->func->card_present(local))
2491 return;
2492
2493 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2494
2495 /* Process all pending BAP events without generating new interrupts
2496 * for them */
2497 while (frames-- > 0) {
2498 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2499 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2500 break;
2501 if (ev & HFA384X_EV_RX)
2502 prism2_rx(local);
2503 if (ev & HFA384X_EV_INFO)
2504 prism2_info(local);
2505 if (ev & HFA384X_EV_TX)
2506 prism2_tx_ev(local);
2507 if (ev & HFA384X_EV_TXEXC)
2508 prism2_txexc(local);
2509 }
2510
2511 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2512 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2513
2514 /* Enable interrupts for new BAP events */
2515 hfa384x_events_all(dev);
2516 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2517}
2518
2519
2520/* Called only from hardware IRQ */
2521static void prism2_infdrop(struct net_device *dev)
2522{
2523 static unsigned long last_inquire = 0;
2524
2525 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2526
2527 /* some firmware versions seem to get stuck with
2528 * full CommTallies in high traffic load cases; every
2529 * packet will then cause INFDROP event and CommTallies
2530 * info frame will not be sent automatically. Try to
2531 * get out of this state by inquiring CommTallies. */
2532 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2533 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2534 HFA384X_INFO_COMMTALLIES, NULL, 0);
2535 last_inquire = jiffies;
2536 }
2537}
2538
2539
2540/* Called only from hardware IRQ */
2541static void prism2_ev_tick(struct net_device *dev)
2542{
2543 struct hostap_interface *iface;
2544 local_info_t *local;
2545 u16 evstat, inten;
2546 static int prev_stuck = 0;
2547
2548 iface = netdev_priv(dev);
2549 local = iface->local;
2550
2551 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2552 local->last_tick_timer) {
2553 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2554 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2555 if (!prev_stuck) {
2556 printk(KERN_INFO "%s: SW TICK stuck? "
2557 "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2558 dev->name, local->bits, evstat, inten);
2559 }
2560 local->sw_tick_stuck++;
2561 if ((evstat & HFA384X_BAP0_EVENTS) &&
2562 (inten & HFA384X_BAP0_EVENTS)) {
2563 printk(KERN_INFO "%s: trying to recover from IRQ "
2564 "hang\n", dev->name);
2565 hfa384x_events_no_bap0(dev);
2566 }
2567 prev_stuck = 1;
2568 } else
2569 prev_stuck = 0;
2570}
2571
2572
2573/* Called only from hardware IRQ */
2574static void prism2_check_magic(local_info_t *local)
2575{
2576 /* at least PCI Prism2.5 with bus mastering seems to sometimes
2577 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2578 * register once or twice seems to get the correct value.. PCI cards
2579 * cannot anyway be removed during normal operation, so there is not
2580 * really any need for this verification with them. */
2581
2582#ifndef PRISM2_PCI
2583#ifndef final_version
2584 static unsigned long last_magic_err = 0;
2585 struct net_device *dev = local->dev;
2586
2587 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2588 if (!local->hw_ready)
2589 return;
2590 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2591 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2592 printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2593 "%04X != %04X - card removed?\n", dev->name,
2594 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2595 HFA384X_MAGIC);
2596 last_magic_err = jiffies;
2597 } else if (net_ratelimit()) {
2598 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2599 "MAGIC=%04x\n", dev->name,
2600 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2601 HFA384X_MAGIC);
2602 }
2603 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2604 schedule_work(&local->reset_queue);
2605 return;
2606 }
2607#endif /* final_version */
2608#endif /* !PRISM2_PCI */
2609}
2610
2611
2612/* Called only from hardware IRQ */
2613static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2614{
2615 struct net_device *dev = dev_id;
2616 struct hostap_interface *iface;
2617 local_info_t *local;
2618 int events = 0;
2619 u16 ev;
2620
2621 iface = netdev_priv(dev);
2622 local = iface->local;
2623
2624 /* Detect early interrupt before driver is fully configured */
2625 spin_lock(&local->irq_init_lock);
2626 if (!dev->base_addr) {
2627 if (net_ratelimit()) {
2628 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2629 dev->name);
2630 }
2631 spin_unlock(&local->irq_init_lock);
2632 return IRQ_HANDLED;
2633 }
2634 spin_unlock(&local->irq_init_lock);
2635
2636 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2637
2638 if (local->func->card_present && !local->func->card_present(local)) {
2639 if (net_ratelimit()) {
2640 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2641 dev->name);
2642 }
2643 return IRQ_HANDLED;
2644 }
2645
2646 prism2_check_magic(local);
2647
2648 for (;;) {
2649 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2650 if (ev == 0xffff) {
2651 if (local->shutdown)
2652 return IRQ_HANDLED;
2653 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2654 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2655 dev->name);
2656 return IRQ_HANDLED;
2657 }
2658
2659 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2660 if (ev == 0)
2661 break;
2662
2663 if (ev & HFA384X_EV_CMD) {
2664 prism2_cmd_ev(dev);
2665 }
2666
2667 /* Above events are needed even before hw is ready, but other
2668 * events should be skipped during initialization. This may
2669 * change for AllocEv if allocate_fid is implemented without
2670 * busy waiting. */
2671 if (!local->hw_ready || local->hw_resetting ||
2672 !local->dev_enabled) {
2673 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2674 if (ev & HFA384X_EV_CMD)
2675 goto next_event;
2676 if ((ev & HFA384X_EVENT_MASK) == 0)
2677 return IRQ_HANDLED;
2678 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2679 net_ratelimit()) {
2680 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2681 "not ready; skipping events 0x%04x "
2682 "(IntEn=0x%04x)%s%s%s\n",
2683 dev->name, ev,
2684 HFA384X_INW(HFA384X_INTEN_OFF),
2685 !local->hw_ready ? " (!hw_ready)" : "",
2686 local->hw_resetting ?
2687 " (hw_resetting)" : "",
2688 !local->dev_enabled ?
2689 " (!dev_enabled)" : "");
2690 }
2691 HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2692 return IRQ_HANDLED;
2693 }
2694
2695 if (ev & HFA384X_EV_TICK) {
2696 prism2_ev_tick(dev);
2697 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2698 }
2699
2700 if (ev & HFA384X_EV_ALLOC) {
2701 prism2_alloc_ev(dev);
2702 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2703 }
2704
2705 /* Reading data from the card is quite time consuming, so do it
2706 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2707 * and unmasked after needed data has been read completely. */
2708 if (ev & HFA384X_BAP0_EVENTS) {
2709 hfa384x_events_no_bap0(dev);
2710 tasklet_schedule(&local->bap_tasklet);
2711 }
2712
2713#ifndef final_version
2714 if (ev & HFA384X_EV_WTERR) {
2715 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2716 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2717 }
2718#endif /* final_version */
2719
2720 if (ev & HFA384X_EV_INFDROP) {
2721 prism2_infdrop(dev);
2722 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2723 }
2724
2725 next_event:
2726 events++;
2727 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2728 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2729 "(EvStat=0x%04x)\n",
2730 PRISM2_MAX_INTERRUPT_EVENTS,
2731 HFA384X_INW(HFA384X_EVSTAT_OFF));
2732 break;
2733 }
2734 }
2735 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2736 return IRQ_RETVAL(events);
2737}
2738
2739
2740static void prism2_check_sta_fw_version(local_info_t *local)
2741{
2742 struct hfa384x_comp_ident comp;
2743 int id, variant, major, minor;
2744
2745 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2746 &comp, sizeof(comp), 1) < 0)
2747 return;
2748
2749 local->fw_ap = 0;
2750 id = le16_to_cpu(comp.id);
2751 if (id != HFA384X_COMP_ID_STA) {
2752 if (id == HFA384X_COMP_ID_FW_AP)
2753 local->fw_ap = 1;
2754 return;
2755 }
2756
2757 major = __le16_to_cpu(comp.major);
2758 minor = __le16_to_cpu(comp.minor);
2759 variant = __le16_to_cpu(comp.variant);
2760 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2761
2762 /* Station firmware versions before 1.4.x seem to have a bug in
2763 * firmware-based WEP encryption when using Host AP mode, so use
2764 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2765 * first one that has been seen to produce correct encryption, but the
2766 * bug might be fixed before that (although, at least 1.4.2 is broken).
2767 */
2768 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2769
2770 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2771 !local->fw_encrypt_ok) {
2772 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2773 "a workaround for firmware bug in Host AP mode WEP\n",
2774 local->dev->name);
2775 local->host_encrypt = 1;
2776 }
2777
2778 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2779 * in station firmware versions before 1.5.x. With these versions, the
2780 * driver uses a workaround with bogus frame format (4th address after
2781 * the payload). This is not compatible with other AP devices. Since
2782 * the firmware bug is fixed in the latest station firmware versions,
2783 * automatically enable standard compliant mode for cards using station
2784 * firmware version 1.5.0 or newer. */
2785 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2786 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2787 else {
2788 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2789 "workaround for firmware bug in Host AP mode WDS\n",
2790 local->dev->name);
2791 }
2792
2793 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2794}
2795
2796
2797static void hostap_passive_scan(struct timer_list *t)
2798{
2799 local_info_t *local = from_timer(local, t, passive_scan_timer);
2800 struct net_device *dev = local->dev;
2801 u16 chan;
2802
2803 if (local->passive_scan_interval <= 0)
2804 return;
2805
2806 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2807 int max_tries = 16;
2808
2809 /* Even though host system does not really know when the WLAN
2810 * MAC is sending frames, try to avoid changing channels for
2811 * passive scanning when a host-generated frame is being
2812 * transmitted */
2813 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2814 printk(KERN_DEBUG "%s: passive scan detected pending "
2815 "TX - delaying\n", dev->name);
2816 local->passive_scan_timer.expires = jiffies + HZ / 10;
2817 add_timer(&local->passive_scan_timer);
2818 return;
2819 }
2820
2821 do {
2822 local->passive_scan_channel++;
2823 if (local->passive_scan_channel > 14)
2824 local->passive_scan_channel = 1;
2825 max_tries--;
2826 } while (!(local->channel_mask &
2827 (1 << (local->passive_scan_channel - 1))) &&
2828 max_tries > 0);
2829
2830 if (max_tries == 0) {
2831 printk(KERN_INFO "%s: no allowed passive scan channels"
2832 " found\n", dev->name);
2833 return;
2834 }
2835
2836 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2837 dev->name, local->passive_scan_channel);
2838 chan = local->passive_scan_channel;
2839 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2840 local->passive_scan_timer.expires = jiffies + HZ / 10;
2841 } else {
2842 chan = local->channel;
2843 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2844 local->passive_scan_timer.expires = jiffies +
2845 local->passive_scan_interval * HZ;
2846 }
2847
2848 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2849 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2850 chan, NULL, 0))
2851 printk(KERN_ERR "%s: passive scan channel set %d "
2852 "failed\n", dev->name, chan);
2853
2854 add_timer(&local->passive_scan_timer);
2855}
2856
2857
2858/* Called only as a scheduled task when communications quality values should
2859 * be updated. */
2860static void handle_comms_qual_update(struct work_struct *work)
2861{
2862 local_info_t *local =
2863 container_of(work, local_info_t, comms_qual_update);
2864 prism2_update_comms_qual(local->dev);
2865}
2866
2867
2868/* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2869 * used to monitor that local->last_tick_timer is being updated. If not,
2870 * interrupt busy-loop is assumed and driver tries to recover by masking out
2871 * some events. */
2872static void hostap_tick_timer(struct timer_list *t)
2873{
2874 static unsigned long last_inquire = 0;
2875 local_info_t *local = from_timer(local, t, tick_timer);
2876 local->last_tick_timer = jiffies;
2877
2878 /* Inquire CommTallies every 10 seconds to keep the statistics updated
2879 * more often during low load and when using 32-bit tallies. */
2880 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2881 !local->hw_downloading && local->hw_ready &&
2882 !local->hw_resetting && local->dev_enabled) {
2883 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2884 HFA384X_INFO_COMMTALLIES, NULL, 0);
2885 last_inquire = jiffies;
2886 }
2887
2888 if ((local->last_comms_qual_update == 0 ||
2889 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2890 (local->iw_mode == IW_MODE_INFRA ||
2891 local->iw_mode == IW_MODE_ADHOC)) {
2892 schedule_work(&local->comms_qual_update);
2893 }
2894
2895 local->tick_timer.expires = jiffies + 2 * HZ;
2896 add_timer(&local->tick_timer);
2897}
2898
2899
2900#ifndef PRISM2_NO_PROCFS_DEBUG
2901static int prism2_registers_proc_show(struct seq_file *m, void *v)
2902{
2903 local_info_t *local = m->private;
2904
2905#define SHOW_REG(n) \
2906 seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2907
2908 SHOW_REG(CMD);
2909 SHOW_REG(PARAM0);
2910 SHOW_REG(PARAM1);
2911 SHOW_REG(PARAM2);
2912 SHOW_REG(STATUS);
2913 SHOW_REG(RESP0);
2914 SHOW_REG(RESP1);
2915 SHOW_REG(RESP2);
2916 SHOW_REG(INFOFID);
2917 SHOW_REG(CONTROL);
2918 SHOW_REG(SELECT0);
2919 SHOW_REG(SELECT1);
2920 SHOW_REG(OFFSET0);
2921 SHOW_REG(OFFSET1);
2922 SHOW_REG(RXFID);
2923 SHOW_REG(ALLOCFID);
2924 SHOW_REG(TXCOMPLFID);
2925 SHOW_REG(SWSUPPORT0);
2926 SHOW_REG(SWSUPPORT1);
2927 SHOW_REG(SWSUPPORT2);
2928 SHOW_REG(EVSTAT);
2929 SHOW_REG(INTEN);
2930 SHOW_REG(EVACK);
2931 /* Do not read data registers, because they change the state of the
2932 * MAC (offset += 2) */
2933 /* SHOW_REG(DATA0); */
2934 /* SHOW_REG(DATA1); */
2935 SHOW_REG(AUXPAGE);
2936 SHOW_REG(AUXOFFSET);
2937 /* SHOW_REG(AUXDATA); */
2938#ifdef PRISM2_PCI
2939 SHOW_REG(PCICOR);
2940 SHOW_REG(PCIHCR);
2941 SHOW_REG(PCI_M0_ADDRH);
2942 SHOW_REG(PCI_M0_ADDRL);
2943 SHOW_REG(PCI_M0_LEN);
2944 SHOW_REG(PCI_M0_CTL);
2945 SHOW_REG(PCI_STATUS);
2946 SHOW_REG(PCI_M1_ADDRH);
2947 SHOW_REG(PCI_M1_ADDRL);
2948 SHOW_REG(PCI_M1_LEN);
2949 SHOW_REG(PCI_M1_CTL);
2950#endif /* PRISM2_PCI */
2951
2952 return 0;
2953}
2954
2955static int prism2_registers_proc_open(struct inode *inode, struct file *file)
2956{
2957 return single_open(file, prism2_registers_proc_show, PDE_DATA(inode));
2958}
2959
2960static const struct file_operations prism2_registers_proc_fops = {
2961 .open = prism2_registers_proc_open,
2962 .read = seq_read,
2963 .llseek = seq_lseek,
2964 .release = single_release,
2965};
2966
2967#endif /* PRISM2_NO_PROCFS_DEBUG */
2968
2969
2970struct set_tim_data {
2971 struct list_head list;
2972 int aid;
2973 int set;
2974};
2975
2976static int prism2_set_tim(struct net_device *dev, int aid, int set)
2977{
2978 struct list_head *ptr;
2979 struct set_tim_data *new_entry;
2980 struct hostap_interface *iface;
2981 local_info_t *local;
2982
2983 iface = netdev_priv(dev);
2984 local = iface->local;
2985
2986 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2987 if (new_entry == NULL)
2988 return -ENOMEM;
2989
2990 new_entry->aid = aid;
2991 new_entry->set = set;
2992
2993 spin_lock_bh(&local->set_tim_lock);
2994 list_for_each(ptr, &local->set_tim_list) {
2995 struct set_tim_data *entry =
2996 list_entry(ptr, struct set_tim_data, list);
2997 if (entry->aid == aid) {
2998 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2999 "set=%d ==> %d\n",
3000 local->dev->name, aid, entry->set, set);
3001 entry->set = set;
3002 kfree(new_entry);
3003 new_entry = NULL;
3004 break;
3005 }
3006 }
3007 if (new_entry)
3008 list_add_tail(&new_entry->list, &local->set_tim_list);
3009 spin_unlock_bh(&local->set_tim_lock);
3010
3011 schedule_work(&local->set_tim_queue);
3012
3013 return 0;
3014}
3015
3016
3017static void handle_set_tim_queue(struct work_struct *work)
3018{
3019 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3020 struct set_tim_data *entry;
3021 u16 val;
3022
3023 for (;;) {
3024 entry = NULL;
3025 spin_lock_bh(&local->set_tim_lock);
3026 if (!list_empty(&local->set_tim_list)) {
3027 entry = list_entry(local->set_tim_list.next,
3028 struct set_tim_data, list);
3029 list_del(&entry->list);
3030 }
3031 spin_unlock_bh(&local->set_tim_lock);
3032 if (!entry)
3033 break;
3034
3035 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3036 local->dev->name, entry->aid, entry->set);
3037
3038 val = entry->aid;
3039 if (entry->set)
3040 val |= 0x8000;
3041 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3042 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3043 "set=%d)\n",
3044 local->dev->name, entry->aid, entry->set);
3045 }
3046
3047 kfree(entry);
3048 }
3049}
3050
3051
3052static void prism2_clear_set_tim_queue(local_info_t *local)
3053{
3054 struct list_head *ptr, *n;
3055
3056 list_for_each_safe(ptr, n, &local->set_tim_list) {
3057 struct set_tim_data *entry;
3058 entry = list_entry(ptr, struct set_tim_data, list);
3059 list_del(&entry->list);
3060 kfree(entry);
3061 }
3062}
3063
3064
3065/*
3066 * HostAP uses two layers of net devices, where the inner
3067 * layer gets called all the time from the outer layer.
3068 * This is a natural nesting, which needs a split lock type.
3069 */
3070static struct lock_class_key hostap_netdev_xmit_lock_key;
3071static struct lock_class_key hostap_netdev_addr_lock_key;
3072
3073static void prism2_set_lockdep_class_one(struct net_device *dev,
3074 struct netdev_queue *txq,
3075 void *_unused)
3076{
3077 lockdep_set_class(&txq->_xmit_lock,
3078 &hostap_netdev_xmit_lock_key);
3079}
3080
3081static void prism2_set_lockdep_class(struct net_device *dev)
3082{
3083 lockdep_set_class(&dev->addr_list_lock,
3084 &hostap_netdev_addr_lock_key);
3085 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3086}
3087
3088static struct net_device *
3089prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3090 struct device *sdev)
3091{
3092 struct net_device *dev;
3093 struct hostap_interface *iface;
3094 struct local_info *local;
3095 int len, i, ret;
3096
3097 if (funcs == NULL)
3098 return NULL;
3099
3100 len = strlen(dev_template);
3101 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3102 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3103 dev_template);
3104 return NULL;
3105 }
3106
3107 len = sizeof(struct hostap_interface) +
3108 3 + sizeof(struct local_info) +
3109 3 + sizeof(struct ap_data);
3110
3111 dev = alloc_etherdev(len);
3112 if (dev == NULL)
3113 return NULL;
3114
3115 iface = netdev_priv(dev);
3116 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3117 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3118 local->dev = iface->dev = dev;
3119 iface->local = local;
3120 iface->type = HOSTAP_INTERFACE_MASTER;
3121 INIT_LIST_HEAD(&local->hostap_interfaces);
3122
3123 local->hw_module = THIS_MODULE;
3124
3125#ifdef PRISM2_IO_DEBUG
3126 local->io_debug_enabled = 1;
3127#endif /* PRISM2_IO_DEBUG */
3128
3129 local->func = funcs;
3130 local->func->cmd = hfa384x_cmd;
3131 local->func->read_regs = hfa384x_read_regs;
3132 local->func->get_rid = hfa384x_get_rid;
3133 local->func->set_rid = hfa384x_set_rid;
3134 local->func->hw_enable = prism2_hw_enable;
3135 local->func->hw_config = prism2_hw_config;
3136 local->func->hw_reset = prism2_hw_reset;
3137 local->func->hw_shutdown = prism2_hw_shutdown;
3138 local->func->reset_port = prism2_reset_port;
3139 local->func->schedule_reset = prism2_schedule_reset;
3140#ifdef PRISM2_DOWNLOAD_SUPPORT
3141 local->func->read_aux_fops = &prism2_download_aux_dump_proc_fops;
3142 local->func->download = prism2_download;
3143#endif /* PRISM2_DOWNLOAD_SUPPORT */
3144 local->func->tx = prism2_tx_80211;
3145 local->func->set_tim = prism2_set_tim;
3146 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3147 * skb->data (FIX: maybe for DMA bus
3148 * mastering? */
3149
3150 local->mtu = mtu;
3151
3152 rwlock_init(&local->iface_lock);
3153 spin_lock_init(&local->txfidlock);
3154 spin_lock_init(&local->cmdlock);
3155 spin_lock_init(&local->baplock);
3156 spin_lock_init(&local->lock);
3157 spin_lock_init(&local->irq_init_lock);
3158 mutex_init(&local->rid_bap_mtx);
3159
3160 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3161 card_idx = 0;
3162 local->card_idx = card_idx;
3163
3164 len = strlen(essid);
3165 memcpy(local->essid, essid,
3166 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3167 local->essid[MAX_SSID_LEN] = '\0';
3168 i = GET_INT_PARM(iw_mode, card_idx);
3169 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3170 i == IW_MODE_MONITOR) {
3171 local->iw_mode = i;
3172 } else {
3173 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3174 "IW_MODE_MASTER\n", i);
3175 local->iw_mode = IW_MODE_MASTER;
3176 }
3177 local->channel = GET_INT_PARM(channel, card_idx);
3178 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3179 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3180 local->wds_max_connections = 16;
3181 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3182 local->manual_retry_count = -1;
3183 local->rts_threshold = 2347;
3184 local->fragm_threshold = 2346;
3185 local->rssi_to_dBm = 100; /* default; to be overriden by
3186 * cnfDbmAdjust, if available */
3187 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3188 local->sram_type = -1;
3189 local->scan_channel_mask = 0xffff;
3190 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3191
3192 /* Initialize task queue structures */
3193 INIT_WORK(&local->reset_queue, handle_reset_queue);
3194 INIT_WORK(&local->set_multicast_list_queue,
3195 hostap_set_multicast_list_queue);
3196
3197 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3198 INIT_LIST_HEAD(&local->set_tim_list);
3199 spin_lock_init(&local->set_tim_lock);
3200
3201 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3202
3203 /* Initialize tasklets for handling hardware IRQ related operations
3204 * outside hw IRQ handler */
3205#define HOSTAP_TASKLET_INIT(q, f, d) \
3206do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3207while (0)
3208 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3209 (unsigned long) local);
3210
3211 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3212 (unsigned long) local);
3213 hostap_info_init(local);
3214
3215 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3216 hostap_rx_tasklet, (unsigned long) local);
3217 skb_queue_head_init(&local->rx_list);
3218
3219 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3220 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3221 skb_queue_head_init(&local->sta_tx_exc_list);
3222
3223 INIT_LIST_HEAD(&local->cmd_queue);
3224 init_waitqueue_head(&local->hostscan_wq);
3225
3226 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3227
3228 timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3229 timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3230 local->tick_timer.expires = jiffies + 2 * HZ;
3231 add_timer(&local->tick_timer);
3232
3233 INIT_LIST_HEAD(&local->bss_list);
3234
3235 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3236
3237 dev->type = ARPHRD_IEEE80211;
3238 dev->header_ops = &hostap_80211_ops;
3239
3240 rtnl_lock();
3241 ret = dev_alloc_name(dev, "wifi%d");
3242 SET_NETDEV_DEV(dev, sdev);
3243 if (ret >= 0)
3244 ret = register_netdevice(dev);
3245
3246 prism2_set_lockdep_class(dev);
3247 rtnl_unlock();
3248 if (ret < 0) {
3249 printk(KERN_WARNING "%s: register netdevice failed!\n",
3250 dev_info);
3251 goto fail;
3252 }
3253 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3254
3255 hostap_init_data(local);
3256 return dev;
3257
3258 fail:
3259 free_netdev(dev);
3260 return NULL;
3261}
3262
3263
3264static int hostap_hw_ready(struct net_device *dev)
3265{
3266 struct hostap_interface *iface;
3267 struct local_info *local;
3268
3269 iface = netdev_priv(dev);
3270 local = iface->local;
3271 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3272 "", dev_template);
3273
3274 if (local->ddev) {
3275 if (local->iw_mode == IW_MODE_INFRA ||
3276 local->iw_mode == IW_MODE_ADHOC) {
3277 netif_carrier_off(local->dev);
3278 netif_carrier_off(local->ddev);
3279 }
3280 hostap_init_proc(local);
3281#ifndef PRISM2_NO_PROCFS_DEBUG
3282 proc_create_data("registers", 0, local->proc,
3283 &prism2_registers_proc_fops, local);
3284#endif /* PRISM2_NO_PROCFS_DEBUG */
3285 hostap_init_ap_proc(local);
3286 return 0;
3287 }
3288
3289 return -1;
3290}
3291
3292
3293static void prism2_free_local_data(struct net_device *dev)
3294{
3295 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3296 int i;
3297 struct hostap_interface *iface;
3298 struct local_info *local;
3299 struct list_head *ptr, *n;
3300
3301 if (dev == NULL)
3302 return;
3303
3304 iface = netdev_priv(dev);
3305 local = iface->local;
3306
3307 /* Unregister all netdevs before freeing local data. */
3308 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3309 iface = list_entry(ptr, struct hostap_interface, list);
3310 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3311 /* special handling for this interface below */
3312 continue;
3313 }
3314 hostap_remove_interface(iface->dev, 0, 1);
3315 }
3316
3317 unregister_netdev(local->dev);
3318
3319 flush_work(&local->reset_queue);
3320 flush_work(&local->set_multicast_list_queue);
3321 flush_work(&local->set_tim_queue);
3322#ifndef PRISM2_NO_STATION_MODES
3323 flush_work(&local->info_queue);
3324#endif
3325 flush_work(&local->comms_qual_update);
3326
3327 lib80211_crypt_info_free(&local->crypt_info);
3328
3329 if (timer_pending(&local->passive_scan_timer))
3330 del_timer(&local->passive_scan_timer);
3331
3332 if (timer_pending(&local->tick_timer))
3333 del_timer(&local->tick_timer);
3334
3335 prism2_clear_cmd_queue(local);
3336
3337 skb_queue_purge(&local->info_list);
3338 skb_queue_purge(&local->rx_list);
3339 skb_queue_purge(&local->sta_tx_exc_list);
3340
3341 if (local->dev_enabled)
3342 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3343
3344 if (local->ap != NULL)
3345 hostap_free_data(local->ap);
3346
3347#ifndef PRISM2_NO_PROCFS_DEBUG
3348 if (local->proc != NULL)
3349 remove_proc_entry("registers", local->proc);
3350#endif /* PRISM2_NO_PROCFS_DEBUG */
3351 hostap_remove_proc(local);
3352
3353 tx_cb = local->tx_callback;
3354 while (tx_cb != NULL) {
3355 tx_cb_prev = tx_cb;
3356 tx_cb = tx_cb->next;
3357 kfree(tx_cb_prev);
3358 }
3359
3360 hostap_set_hostapd(local, 0, 0);
3361 hostap_set_hostapd_sta(local, 0, 0);
3362
3363 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3364 if (local->frag_cache[i].skb != NULL)
3365 dev_kfree_skb(local->frag_cache[i].skb);
3366 }
3367
3368#ifdef PRISM2_DOWNLOAD_SUPPORT
3369 prism2_download_free_data(local->dl_pri);
3370 prism2_download_free_data(local->dl_sec);
3371#endif /* PRISM2_DOWNLOAD_SUPPORT */
3372
3373 prism2_clear_set_tim_queue(local);
3374
3375 list_for_each_safe(ptr, n, &local->bss_list) {
3376 struct hostap_bss_info *bss =
3377 list_entry(ptr, struct hostap_bss_info, list);
3378 kfree(bss);
3379 }
3380
3381 kfree(local->pda);
3382 kfree(local->last_scan_results);
3383 kfree(local->generic_elem);
3384
3385 free_netdev(local->dev);
3386}
3387
3388
3389#if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3390static void prism2_suspend(struct net_device *dev)
3391{
3392 struct hostap_interface *iface;
3393 struct local_info *local;
3394 union iwreq_data wrqu;
3395
3396 iface = netdev_priv(dev);
3397 local = iface->local;
3398
3399 /* Send disconnect event, e.g., to trigger reassociation after resume
3400 * if wpa_supplicant is used. */
3401 memset(&wrqu, 0, sizeof(wrqu));
3402 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3403 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3404
3405 /* Disable hardware and firmware */
3406 prism2_hw_shutdown(dev, 0);
3407}
3408#endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3409
3410
3411/* These might at some point be compiled separately and used as separate
3412 * kernel modules or linked into one */
3413#ifdef PRISM2_DOWNLOAD_SUPPORT
3414#include "hostap_download.c"
3415#endif /* PRISM2_DOWNLOAD_SUPPORT */
3416
3417#ifdef PRISM2_CALLBACK
3418/* External hostap_callback.c file can be used to, e.g., blink activity led.
3419 * This can use platform specific code and must define prism2_callback()
3420 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3421 * used. */
3422#include "hostap_callback.c"
3423#endif /* PRISM2_CALLBACK */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Host AP (software wireless LAN access point) driver for
4 * Intersil Prism2/2.5/3.
5 *
6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * <j@w1.fi>
8 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
9 *
10 * FIX:
11 * - there is currently no way of associating TX packets to correct wds device
12 * when TX Exc/OK event occurs, so all tx_packets and some
13 * tx_errors/tx_dropped are added to the main netdevice; using sw_support
14 * field in txdesc might be used to fix this (using Alloc event to increment
15 * tx_packets would need some further info in txfid table)
16 *
17 * Buffer Access Path (BAP) usage:
18 * Prism2 cards have two separate BAPs for accessing the card memory. These
19 * should allow concurrent access to two different frames and the driver
20 * previously used BAP0 for sending data and BAP1 for receiving data.
21 * However, there seems to be number of issues with concurrent access and at
22 * least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
23 * Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
24 * host and card memories. BAP0 accesses are protected with local->baplock
25 * (spin_lock_bh) to prevent concurrent use.
26 */
27
28
29
30#include <asm/delay.h>
31#include <linux/uaccess.h>
32
33#include <linux/slab.h>
34#include <linux/netdevice.h>
35#include <linux/etherdevice.h>
36#include <linux/proc_fs.h>
37#include <linux/seq_file.h>
38#include <linux/if_arp.h>
39#include <linux/delay.h>
40#include <linux/random.h>
41#include <linux/wait.h>
42#include <linux/sched/signal.h>
43#include <linux/rtnetlink.h>
44#include <linux/wireless.h>
45#include <net/iw_handler.h>
46#include <net/lib80211.h>
47#include <asm/irq.h>
48
49#include "hostap_80211.h"
50#include "hostap.h"
51#include "hostap_ap.h"
52
53
54/* #define final_version */
55
56static int mtu = 1500;
57module_param(mtu, int, 0444);
58MODULE_PARM_DESC(mtu, "Maximum transfer unit");
59
60static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
61module_param_array(channel, int, NULL, 0444);
62MODULE_PARM_DESC(channel, "Initial channel");
63
64static char essid[33] = "test";
65module_param_string(essid, essid, sizeof(essid), 0444);
66MODULE_PARM_DESC(essid, "Host AP's ESSID");
67
68static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
69module_param_array(iw_mode, int, NULL, 0444);
70MODULE_PARM_DESC(iw_mode, "Initial operation mode");
71
72static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
73module_param_array(beacon_int, int, NULL, 0444);
74MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
75
76static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
77module_param_array(dtim_period, int, NULL, 0444);
78MODULE_PARM_DESC(dtim_period, "DTIM period");
79
80static char dev_template[16] = "wlan%d";
81module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
82MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
83 "wlan%d)");
84
85#ifdef final_version
86#define EXTRA_EVENTS_WTERR 0
87#else
88/* check WTERR events (Wait Time-out) in development versions */
89#define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
90#endif
91
92/* Events that will be using BAP0 */
93#define HFA384X_BAP0_EVENTS \
94 (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
95
96/* event mask, i.e., events that will result in an interrupt */
97#define HFA384X_EVENT_MASK \
98 (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
99 HFA384X_EV_CMD | HFA384X_EV_TICK | \
100 EXTRA_EVENTS_WTERR)
101
102/* Default TX control flags: use 802.11 headers and request interrupt for
103 * failed transmits. Frames that request ACK callback, will add
104 * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
105 */
106#define HFA384X_TX_CTRL_FLAGS \
107 (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
108
109
110/* ca. 1 usec */
111#define HFA384X_CMD_BUSY_TIMEOUT 5000
112#define HFA384X_BAP_BUSY_TIMEOUT 50000
113
114/* ca. 10 usec */
115#define HFA384X_CMD_COMPL_TIMEOUT 20000
116#define HFA384X_DL_COMPL_TIMEOUT 1000000
117
118/* Wait times for initialization; yield to other processes to avoid busy
119 * waiting for long time. */
120#define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
121#define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
122
123
124static void prism2_hw_reset(struct net_device *dev);
125static void prism2_check_sta_fw_version(local_info_t *local);
126
127#ifdef PRISM2_DOWNLOAD_SUPPORT
128/* hostap_download.c */
129static const struct proc_ops prism2_download_aux_dump_proc_ops;
130static u8 * prism2_read_pda(struct net_device *dev);
131static int prism2_download(local_info_t *local,
132 struct prism2_download_param *param);
133static void prism2_download_free_data(struct prism2_download_data *dl);
134static int prism2_download_volatile(local_info_t *local,
135 struct prism2_download_data *param);
136static int prism2_download_genesis(local_info_t *local,
137 struct prism2_download_data *param);
138static int prism2_get_ram_size(local_info_t *local);
139#endif /* PRISM2_DOWNLOAD_SUPPORT */
140
141
142
143
144#ifndef final_version
145/* magic value written to SWSUPPORT0 reg. for detecting whether card is still
146 * present */
147#define HFA384X_MAGIC 0x8A32
148#endif
149
150static void hfa384x_read_regs(struct net_device *dev,
151 struct hfa384x_regs *regs)
152{
153 regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
154 regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
155 regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
156 regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
157 regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
158}
159
160
161/**
162 * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
163 * @local: pointer to private Host AP driver data
164 * @entry: Prism2 command queue entry to be freed
165 * @del_req: request the entry to be removed
166 *
167 * Internal helper function for freeing Prism2 command queue entries.
168 * Caller must have acquired local->cmdlock before calling this function.
169 */
170static inline void __hostap_cmd_queue_free(local_info_t *local,
171 struct hostap_cmd_queue *entry,
172 int del_req)
173{
174 if (del_req) {
175 entry->del_req = 1;
176 if (!list_empty(&entry->list)) {
177 list_del_init(&entry->list);
178 local->cmd_queue_len--;
179 }
180 }
181
182 if (refcount_dec_and_test(&entry->usecnt) && entry->del_req)
183 kfree(entry);
184}
185
186
187/**
188 * hostap_cmd_queue_free - Free Prism2 command queue entry
189 * @local: pointer to private Host AP driver data
190 * @entry: Prism2 command queue entry to be freed
191 * @del_req: request the entry to be removed
192 *
193 * Free a Prism2 command queue entry.
194 */
195static inline void hostap_cmd_queue_free(local_info_t *local,
196 struct hostap_cmd_queue *entry,
197 int del_req)
198{
199 unsigned long flags;
200
201 spin_lock_irqsave(&local->cmdlock, flags);
202 __hostap_cmd_queue_free(local, entry, del_req);
203 spin_unlock_irqrestore(&local->cmdlock, flags);
204}
205
206
207/**
208 * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
209 * @local: pointer to private Host AP driver data
210 */
211static void prism2_clear_cmd_queue(local_info_t *local)
212{
213 struct list_head *ptr, *n;
214 unsigned long flags;
215 struct hostap_cmd_queue *entry;
216
217 spin_lock_irqsave(&local->cmdlock, flags);
218 list_for_each_safe(ptr, n, &local->cmd_queue) {
219 entry = list_entry(ptr, struct hostap_cmd_queue, list);
220 refcount_inc(&entry->usecnt);
221 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
222 "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
223 local->dev->name, entry->type, entry->cmd,
224 entry->param0);
225 __hostap_cmd_queue_free(local, entry, 1);
226 }
227 if (local->cmd_queue_len) {
228 /* This should not happen; print debug message and clear
229 * queue length. */
230 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
231 "flush\n", local->dev->name, local->cmd_queue_len);
232 local->cmd_queue_len = 0;
233 }
234 spin_unlock_irqrestore(&local->cmdlock, flags);
235}
236
237
238/**
239 * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
240 * @dev: pointer to net_device
241 * @entry: Prism2 command queue entry to be issued
242 */
243static int hfa384x_cmd_issue(struct net_device *dev,
244 struct hostap_cmd_queue *entry)
245{
246 struct hostap_interface *iface;
247 local_info_t *local;
248 int tries;
249 u16 reg;
250 unsigned long flags;
251
252 iface = netdev_priv(dev);
253 local = iface->local;
254
255 if (local->func->card_present && !local->func->card_present(local))
256 return -ENODEV;
257
258 if (entry->issued) {
259 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
260 dev->name, entry);
261 }
262
263 /* wait until busy bit is clear; this should always be clear since the
264 * commands are serialized */
265 tries = HFA384X_CMD_BUSY_TIMEOUT;
266 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
267 tries--;
268 udelay(1);
269 }
270#ifndef final_version
271 if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
272 prism2_io_debug_error(dev, 1);
273 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
274 "for %d usec\n", dev->name,
275 HFA384X_CMD_BUSY_TIMEOUT - tries);
276 }
277#endif
278 if (tries == 0) {
279 reg = HFA384X_INW(HFA384X_CMD_OFF);
280 prism2_io_debug_error(dev, 2);
281 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
282 "reg=0x%04x\n", dev->name, reg);
283 return -ETIMEDOUT;
284 }
285
286 /* write command */
287 spin_lock_irqsave(&local->cmdlock, flags);
288 HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
289 HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
290 HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
291 entry->issued = 1;
292 spin_unlock_irqrestore(&local->cmdlock, flags);
293
294 return 0;
295}
296
297
298/**
299 * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
300 * @dev: pointer to net_device
301 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
302 * @param0: value for Param0 register
303 * @param1: value for Param1 register (pointer; %NULL if not used)
304 * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
305 *
306 * Issue given command (possibly after waiting in command queue) and sleep
307 * until the command is completed (or timed out or interrupted). This can be
308 * called only from user process context.
309 */
310static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
311 u16 *param1, u16 *resp0)
312{
313 struct hostap_interface *iface;
314 local_info_t *local;
315 int err, res, issue, issued = 0;
316 unsigned long flags;
317 struct hostap_cmd_queue *entry;
318 DECLARE_WAITQUEUE(wait, current);
319
320 iface = netdev_priv(dev);
321 local = iface->local;
322
323 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
324 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
325 dev->name);
326 return -1;
327 }
328
329 if (signal_pending(current))
330 return -EINTR;
331
332 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
333 if (entry == NULL)
334 return -ENOMEM;
335
336 refcount_set(&entry->usecnt, 1);
337 entry->type = CMD_SLEEP;
338 entry->cmd = cmd;
339 entry->param0 = param0;
340 if (param1)
341 entry->param1 = *param1;
342 init_waitqueue_head(&entry->compl);
343
344 /* prepare to wait for command completion event, but do not sleep yet
345 */
346 add_wait_queue(&entry->compl, &wait);
347 set_current_state(TASK_INTERRUPTIBLE);
348
349 spin_lock_irqsave(&local->cmdlock, flags);
350 issue = list_empty(&local->cmd_queue);
351 if (issue)
352 entry->issuing = 1;
353 list_add_tail(&entry->list, &local->cmd_queue);
354 local->cmd_queue_len++;
355 spin_unlock_irqrestore(&local->cmdlock, flags);
356
357 err = 0;
358 if (!issue)
359 goto wait_completion;
360
361 if (signal_pending(current))
362 err = -EINTR;
363
364 if (!err) {
365 if (hfa384x_cmd_issue(dev, entry))
366 err = -ETIMEDOUT;
367 else
368 issued = 1;
369 }
370
371 wait_completion:
372 if (!err && entry->type != CMD_COMPLETED) {
373 /* sleep until command is completed or timed out */
374 res = schedule_timeout(2 * HZ);
375 } else
376 res = -1;
377
378 if (!err && signal_pending(current))
379 err = -EINTR;
380
381 if (err && issued) {
382 /* the command was issued, so a CmdCompl event should occur
383 * soon; however, there's a pending signal and
384 * schedule_timeout() would be interrupted; wait a short period
385 * of time to avoid removing entry from the list before
386 * CmdCompl event */
387 udelay(300);
388 }
389
390 set_current_state(TASK_RUNNING);
391 remove_wait_queue(&entry->compl, &wait);
392
393 /* If entry->list is still in the list, it must be removed
394 * first and in this case prism2_cmd_ev() does not yet have
395 * local reference to it, and the data can be kfree()'d
396 * here. If the command completion event is still generated,
397 * it will be assigned to next (possibly) pending command, but
398 * the driver will reset the card anyway due to timeout
399 *
400 * If the entry is not in the list prism2_cmd_ev() has a local
401 * reference to it, but keeps cmdlock as long as the data is
402 * needed, so the data can be kfree()'d here. */
403
404 /* FIX: if the entry->list is in the list, it has not been completed
405 * yet, so removing it here is somewhat wrong.. this could cause
406 * references to freed memory and next list_del() causing NULL pointer
407 * dereference.. it would probably be better to leave the entry in the
408 * list and the list should be emptied during hw reset */
409
410 spin_lock_irqsave(&local->cmdlock, flags);
411 if (!list_empty(&entry->list)) {
412 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
413 "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
414 entry->type, res);
415 list_del_init(&entry->list);
416 local->cmd_queue_len--;
417 }
418 spin_unlock_irqrestore(&local->cmdlock, flags);
419
420 if (err) {
421 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
422 dev->name, err);
423 res = err;
424 goto done;
425 }
426
427 if (entry->type != CMD_COMPLETED) {
428 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
429 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
430 "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
431 "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
432 res, entry, entry->type, entry->cmd, entry->param0, reg,
433 HFA384X_INW(HFA384X_INTEN_OFF));
434 if (reg & HFA384X_EV_CMD) {
435 /* Command completion event is pending, but the
436 * interrupt was not delivered - probably an issue
437 * with pcmcia-cs configuration. */
438 printk(KERN_WARNING "%s: interrupt delivery does not "
439 "seem to work\n", dev->name);
440 }
441 prism2_io_debug_error(dev, 3);
442 res = -ETIMEDOUT;
443 goto done;
444 }
445
446 if (resp0 != NULL)
447 *resp0 = entry->resp0;
448#ifndef final_version
449 if (entry->res) {
450 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
451 "resp0=0x%04x\n",
452 dev->name, cmd, entry->res, entry->resp0);
453 }
454#endif /* final_version */
455
456 res = entry->res;
457 done:
458 hostap_cmd_queue_free(local, entry, 1);
459 return res;
460}
461
462
463/**
464 * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
465 * @dev: pointer to net_device
466 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
467 * @param0: value for Param0 register
468 * @callback: command completion callback function (%NULL = no callback)
469 * @context: context data to be given to the callback function
470 *
471 * Issue given command (possibly after waiting in command queue) and use
472 * callback function to indicate command completion. This can be called both
473 * from user and interrupt context. The callback function will be called in
474 * hardware IRQ context. It can be %NULL, when no function is called when
475 * command is completed.
476 */
477static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
478 void (*callback)(struct net_device *dev,
479 long context, u16 resp0,
480 u16 status),
481 long context)
482{
483 struct hostap_interface *iface;
484 local_info_t *local;
485 int issue, ret;
486 unsigned long flags;
487 struct hostap_cmd_queue *entry;
488
489 iface = netdev_priv(dev);
490 local = iface->local;
491
492 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
493 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
494 dev->name);
495 return -1;
496 }
497
498 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
499 if (entry == NULL)
500 return -ENOMEM;
501
502 refcount_set(&entry->usecnt, 1);
503 entry->type = CMD_CALLBACK;
504 entry->cmd = cmd;
505 entry->param0 = param0;
506 entry->callback = callback;
507 entry->context = context;
508
509 spin_lock_irqsave(&local->cmdlock, flags);
510 issue = list_empty(&local->cmd_queue);
511 if (issue)
512 entry->issuing = 1;
513 list_add_tail(&entry->list, &local->cmd_queue);
514 local->cmd_queue_len++;
515 spin_unlock_irqrestore(&local->cmdlock, flags);
516
517 if (issue && hfa384x_cmd_issue(dev, entry))
518 ret = -ETIMEDOUT;
519 else
520 ret = 0;
521
522 hostap_cmd_queue_free(local, entry, ret);
523
524 return ret;
525}
526
527
528/**
529 * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
530 * @dev: pointer to net_device
531 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
532 * @param0: value for Param0 register
533 * @io_debug_num: I/O debug error number
534 *
535 * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
536 */
537static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
538 int io_debug_num)
539{
540 int tries;
541 u16 reg;
542
543 /* wait until busy bit is clear; this should always be clear since the
544 * commands are serialized */
545 tries = HFA384X_CMD_BUSY_TIMEOUT;
546 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
547 tries--;
548 udelay(1);
549 }
550 if (tries == 0) {
551 reg = HFA384X_INW(HFA384X_CMD_OFF);
552 prism2_io_debug_error(dev, io_debug_num);
553 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
554 "reg=0x%04x\n", dev->name, io_debug_num, reg);
555 return -ETIMEDOUT;
556 }
557
558 /* write command */
559 HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
560 HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
561
562 return 0;
563}
564
565
566/**
567 * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
568 * @dev: pointer to net_device
569 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
570 * @param0: value for Param0 register
571 */
572static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
573{
574 int res, tries;
575 u16 reg;
576
577 res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
578 if (res)
579 return res;
580
581 /* wait for command completion */
582 if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
583 tries = HFA384X_DL_COMPL_TIMEOUT;
584 else
585 tries = HFA384X_CMD_COMPL_TIMEOUT;
586
587 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
588 tries > 0) {
589 tries--;
590 udelay(10);
591 }
592 if (tries == 0) {
593 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
594 prism2_io_debug_error(dev, 5);
595 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
596 "reg=0x%04x\n", dev->name, reg);
597 return -ETIMEDOUT;
598 }
599
600 res = (HFA384X_INW(HFA384X_STATUS_OFF) &
601 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
602 BIT(8))) >> 8;
603#ifndef final_version
604 if (res) {
605 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
606 dev->name, cmd, res);
607 }
608#endif
609
610 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
611
612 return res;
613}
614
615
616/**
617 * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
618 * @dev: pointer to net_device
619 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
620 * @param0: value for Param0 register
621 */
622static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
623 u16 param0)
624{
625 return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
626}
627
628
629/**
630 * prism2_cmd_ev - Prism2 command completion event handler
631 * @dev: pointer to net_device
632 *
633 * Interrupt handler for command completion events. Called by the main
634 * interrupt handler in hardware IRQ context. Read Resp0 and status registers
635 * from the hardware and ACK the event. Depending on the issued command type
636 * either wake up the sleeping process that is waiting for command completion
637 * or call the callback function. Issue the next command, if one is pending.
638 */
639static void prism2_cmd_ev(struct net_device *dev)
640{
641 struct hostap_interface *iface;
642 local_info_t *local;
643 struct hostap_cmd_queue *entry = NULL;
644
645 iface = netdev_priv(dev);
646 local = iface->local;
647
648 spin_lock(&local->cmdlock);
649 if (!list_empty(&local->cmd_queue)) {
650 entry = list_entry(local->cmd_queue.next,
651 struct hostap_cmd_queue, list);
652 refcount_inc(&entry->usecnt);
653 list_del_init(&entry->list);
654 local->cmd_queue_len--;
655
656 if (!entry->issued) {
657 printk(KERN_DEBUG "%s: Command completion event, but "
658 "cmd not issued\n", dev->name);
659 __hostap_cmd_queue_free(local, entry, 1);
660 entry = NULL;
661 }
662 }
663 spin_unlock(&local->cmdlock);
664
665 if (!entry) {
666 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
667 printk(KERN_DEBUG "%s: Command completion event, but no "
668 "pending commands\n", dev->name);
669 return;
670 }
671
672 entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
673 entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
674 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
675 BIT(9) | BIT(8))) >> 8;
676 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
677
678 /* TODO: rest of the CmdEv handling could be moved to tasklet */
679 if (entry->type == CMD_SLEEP) {
680 entry->type = CMD_COMPLETED;
681 wake_up_interruptible(&entry->compl);
682 } else if (entry->type == CMD_CALLBACK) {
683 if (entry->callback)
684 entry->callback(dev, entry->context, entry->resp0,
685 entry->res);
686 } else {
687 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
688 dev->name, entry->type);
689 }
690 hostap_cmd_queue_free(local, entry, 1);
691
692 /* issue next command, if pending */
693 entry = NULL;
694 spin_lock(&local->cmdlock);
695 if (!list_empty(&local->cmd_queue)) {
696 entry = list_entry(local->cmd_queue.next,
697 struct hostap_cmd_queue, list);
698 if (entry->issuing) {
699 /* hfa384x_cmd() has already started issuing this
700 * command, so do not start here */
701 entry = NULL;
702 }
703 if (entry)
704 refcount_inc(&entry->usecnt);
705 }
706 spin_unlock(&local->cmdlock);
707
708 if (entry) {
709 /* issue next command; if command issuing fails, remove the
710 * entry from cmd_queue */
711 int res = hfa384x_cmd_issue(dev, entry);
712 spin_lock(&local->cmdlock);
713 __hostap_cmd_queue_free(local, entry, res);
714 spin_unlock(&local->cmdlock);
715 }
716}
717
718
719static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
720{
721 int tries = HFA384X_BAP_BUSY_TIMEOUT;
722 int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
723
724 while (res && tries > 0) {
725 tries--;
726 udelay(1);
727 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
728 }
729 return res;
730}
731
732
733/* Offset must be even */
734static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
735 int offset)
736{
737 u16 o_off, s_off;
738 int ret = 0;
739
740 if (offset % 2 || bap > 1)
741 return -EINVAL;
742
743 if (bap == BAP1) {
744 o_off = HFA384X_OFFSET1_OFF;
745 s_off = HFA384X_SELECT1_OFF;
746 } else {
747 o_off = HFA384X_OFFSET0_OFF;
748 s_off = HFA384X_SELECT0_OFF;
749 }
750
751 if (hfa384x_wait_offset(dev, o_off)) {
752 prism2_io_debug_error(dev, 7);
753 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
754 dev->name);
755 ret = -ETIMEDOUT;
756 goto out;
757 }
758
759 HFA384X_OUTW(id, s_off);
760 HFA384X_OUTW(offset, o_off);
761
762 if (hfa384x_wait_offset(dev, o_off)) {
763 prism2_io_debug_error(dev, 8);
764 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
765 dev->name);
766 ret = -ETIMEDOUT;
767 goto out;
768 }
769#ifndef final_version
770 if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
771 prism2_io_debug_error(dev, 9);
772 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
773 "(%d,0x04%x,%d); reg=0x%04x\n",
774 dev->name, bap, id, offset, HFA384X_INW(o_off));
775 ret = -EINVAL;
776 }
777#endif
778
779 out:
780 return ret;
781}
782
783
784static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
785 int exact_len)
786{
787 struct hostap_interface *iface;
788 local_info_t *local;
789 int res, rlen = 0;
790 struct hfa384x_rid_hdr rec;
791
792 iface = netdev_priv(dev);
793 local = iface->local;
794
795 if (local->no_pri) {
796 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
797 "f/w\n", dev->name, rid, len);
798 return -ENOTTY; /* Well.. not really correct, but return
799 * something unique enough.. */
800 }
801
802 if ((local->func->card_present && !local->func->card_present(local)) ||
803 local->hw_downloading)
804 return -ENODEV;
805
806 res = mutex_lock_interruptible(&local->rid_bap_mtx);
807 if (res)
808 return res;
809
810 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
811 if (res) {
812 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
813 "(res=%d, rid=%04x, len=%d)\n",
814 dev->name, res, rid, len);
815 mutex_unlock(&local->rid_bap_mtx);
816 return res;
817 }
818
819 spin_lock_bh(&local->baplock);
820
821 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
822 if (res)
823 goto unlock;
824
825 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
826 if (res)
827 goto unlock;
828
829 if (le16_to_cpu(rec.len) == 0) {
830 /* RID not available */
831 res = -ENODATA;
832 goto unlock;
833 }
834
835 rlen = (le16_to_cpu(rec.len) - 1) * 2;
836 if (exact_len && rlen != len) {
837 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
838 "rid=0x%04x, len=%d (expected %d)\n",
839 dev->name, rid, rlen, len);
840 res = -ENODATA;
841 }
842
843 res = hfa384x_from_bap(dev, BAP0, buf, len);
844
845unlock:
846 spin_unlock_bh(&local->baplock);
847 mutex_unlock(&local->rid_bap_mtx);
848
849 if (res) {
850 if (res != -ENODATA)
851 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
852 "len=%d) - failed - res=%d\n", dev->name, rid,
853 len, res);
854 if (res == -ETIMEDOUT)
855 prism2_hw_reset(dev);
856 return res;
857 }
858
859 return rlen;
860}
861
862
863static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
864{
865 struct hostap_interface *iface;
866 local_info_t *local;
867 struct hfa384x_rid_hdr rec;
868 int res;
869
870 iface = netdev_priv(dev);
871 local = iface->local;
872
873 if (local->no_pri) {
874 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
875 "f/w\n", dev->name, rid, len);
876 return -ENOTTY; /* Well.. not really correct, but return
877 * something unique enough.. */
878 }
879
880 if ((local->func->card_present && !local->func->card_present(local)) ||
881 local->hw_downloading)
882 return -ENODEV;
883
884 rec.rid = cpu_to_le16(rid);
885 /* RID len in words and +1 for rec.rid */
886 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
887
888 res = mutex_lock_interruptible(&local->rid_bap_mtx);
889 if (res)
890 return res;
891
892 spin_lock_bh(&local->baplock);
893 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
894 if (!res)
895 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
896 if (!res)
897 res = hfa384x_to_bap(dev, BAP0, buf, len);
898 spin_unlock_bh(&local->baplock);
899
900 if (res) {
901 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
902 "failed - res=%d\n", dev->name, rid, len, res);
903 mutex_unlock(&local->rid_bap_mtx);
904 return res;
905 }
906
907 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
908 mutex_unlock(&local->rid_bap_mtx);
909
910 if (res) {
911 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
912 "failed (res=%d, rid=%04x, len=%d)\n",
913 dev->name, res, rid, len);
914
915 if (res == -ETIMEDOUT)
916 prism2_hw_reset(dev);
917 }
918
919 return res;
920}
921
922
923static void hfa384x_disable_interrupts(struct net_device *dev)
924{
925 /* disable interrupts and clear event status */
926 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
927 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
928}
929
930
931static void hfa384x_enable_interrupts(struct net_device *dev)
932{
933 /* ack pending events and enable interrupts from selected events */
934 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
935 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
936}
937
938
939static void hfa384x_events_no_bap0(struct net_device *dev)
940{
941 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
942 HFA384X_INTEN_OFF);
943}
944
945
946static void hfa384x_events_all(struct net_device *dev)
947{
948 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
949}
950
951
952static void hfa384x_events_only_cmd(struct net_device *dev)
953{
954 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
955}
956
957
958static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
959{
960 u16 fid;
961 unsigned long delay;
962
963 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
964 * below would be handled like CmdCompl event (sleep here, wake up from
965 * interrupt handler */
966 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
967 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
968 dev->name, len);
969 return 0xffff;
970 }
971
972 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
973 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
974 time_before(jiffies, delay))
975 yield();
976 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
977 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
978 return 0xffff;
979 }
980
981 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
982 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
983
984 return fid;
985}
986
987
988static int prism2_reset_port(struct net_device *dev)
989{
990 struct hostap_interface *iface;
991 local_info_t *local;
992 int res;
993
994 iface = netdev_priv(dev);
995 local = iface->local;
996
997 if (!local->dev_enabled)
998 return 0;
999
1000 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1001 NULL, NULL);
1002 if (res)
1003 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1004 dev->name);
1005 else {
1006 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1007 NULL, NULL);
1008 if (res)
1009 printk(KERN_DEBUG "%s: reset port failed to enable "
1010 "port\n", dev->name);
1011 }
1012
1013 /* It looks like at least some STA firmware versions reset
1014 * fragmentation threshold back to 2346 after enable command. Restore
1015 * the configured value, if it differs from this default. */
1016 if (local->fragm_threshold != 2346 &&
1017 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1018 local->fragm_threshold)) {
1019 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1020 "threshold (%d) after Port0 enable\n",
1021 dev->name, local->fragm_threshold);
1022 }
1023
1024 /* Some firmwares lose antenna selection settings on reset */
1025 (void) hostap_set_antsel(local);
1026
1027 return res;
1028}
1029
1030
1031static int prism2_get_version_info(struct net_device *dev, u16 rid,
1032 const char *txt)
1033{
1034 struct hfa384x_comp_ident comp;
1035 struct hostap_interface *iface;
1036 local_info_t *local;
1037
1038 iface = netdev_priv(dev);
1039 local = iface->local;
1040
1041 if (local->no_pri) {
1042 /* PRI f/w not yet available - cannot read RIDs */
1043 return -1;
1044 }
1045 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1046 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1047 return -1;
1048 }
1049
1050 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1051 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1052 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1053 return 0;
1054}
1055
1056
1057static int prism2_setup_rids(struct net_device *dev)
1058{
1059 struct hostap_interface *iface;
1060 local_info_t *local;
1061 __le16 tmp;
1062 int ret = 0;
1063
1064 iface = netdev_priv(dev);
1065 local = iface->local;
1066
1067 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1068
1069 if (!local->fw_ap) {
1070 u16 tmp1 = hostap_get_porttype(local);
1071 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1072 if (ret) {
1073 printk("%s: Port type setting to %d failed\n",
1074 dev->name, tmp1);
1075 goto fail;
1076 }
1077 }
1078
1079 /* Setting SSID to empty string seems to kill the card in Host AP mode
1080 */
1081 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1082 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1083 local->essid);
1084 if (ret) {
1085 printk("%s: AP own SSID setting failed\n", dev->name);
1086 goto fail;
1087 }
1088 }
1089
1090 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1091 PRISM2_DATA_MAXLEN);
1092 if (ret) {
1093 printk("%s: MAC data length setting to %d failed\n",
1094 dev->name, PRISM2_DATA_MAXLEN);
1095 goto fail;
1096 }
1097
1098 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1099 printk("%s: Channel list read failed\n", dev->name);
1100 ret = -EINVAL;
1101 goto fail;
1102 }
1103 local->channel_mask = le16_to_cpu(tmp);
1104
1105 if (local->channel < 1 || local->channel > 14 ||
1106 !(local->channel_mask & (1 << (local->channel - 1)))) {
1107 printk(KERN_WARNING "%s: Channel setting out of range "
1108 "(%d)!\n", dev->name, local->channel);
1109 ret = -EBUSY;
1110 goto fail;
1111 }
1112
1113 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1114 if (ret) {
1115 printk("%s: Channel setting to %d failed\n",
1116 dev->name, local->channel);
1117 goto fail;
1118 }
1119
1120 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1121 local->beacon_int);
1122 if (ret) {
1123 printk("%s: Beacon interval setting to %d failed\n",
1124 dev->name, local->beacon_int);
1125 /* this may fail with Symbol/Lucent firmware */
1126 if (ret == -ETIMEDOUT)
1127 goto fail;
1128 }
1129
1130 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1131 local->dtim_period);
1132 if (ret) {
1133 printk("%s: DTIM period setting to %d failed\n",
1134 dev->name, local->dtim_period);
1135 /* this may fail with Symbol/Lucent firmware */
1136 if (ret == -ETIMEDOUT)
1137 goto fail;
1138 }
1139
1140 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1141 local->is_promisc);
1142 if (ret)
1143 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1144 dev->name, local->is_promisc);
1145
1146 if (!local->fw_ap) {
1147 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1148 local->essid);
1149 if (ret) {
1150 printk("%s: Desired SSID setting failed\n", dev->name);
1151 goto fail;
1152 }
1153 }
1154
1155 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1156 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1157 * rates */
1158 if (local->tx_rate_control == 0) {
1159 local->tx_rate_control =
1160 HFA384X_RATES_1MBPS |
1161 HFA384X_RATES_2MBPS |
1162 HFA384X_RATES_5MBPS |
1163 HFA384X_RATES_11MBPS;
1164 }
1165 if (local->basic_rates == 0)
1166 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1167
1168 if (!local->fw_ap) {
1169 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1170 local->tx_rate_control);
1171 if (ret) {
1172 printk("%s: TXRateControl setting to %d failed\n",
1173 dev->name, local->tx_rate_control);
1174 goto fail;
1175 }
1176
1177 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1178 local->tx_rate_control);
1179 if (ret) {
1180 printk("%s: cnfSupportedRates setting to %d failed\n",
1181 dev->name, local->tx_rate_control);
1182 }
1183
1184 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1185 local->basic_rates);
1186 if (ret) {
1187 printk("%s: cnfBasicRates setting to %d failed\n",
1188 dev->name, local->basic_rates);
1189 }
1190
1191 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1192 if (ret) {
1193 printk("%s: Create IBSS setting to 1 failed\n",
1194 dev->name);
1195 }
1196 }
1197
1198 if (local->name_set)
1199 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1200 local->name);
1201
1202 if (hostap_set_encryption(local)) {
1203 printk(KERN_INFO "%s: could not configure encryption\n",
1204 dev->name);
1205 }
1206
1207 (void) hostap_set_antsel(local);
1208
1209 if (hostap_set_roaming(local)) {
1210 printk(KERN_INFO "%s: could not set host roaming\n",
1211 dev->name);
1212 }
1213
1214 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1215 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1216 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1217 dev->name, local->enh_sec);
1218
1219 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1220 * not working correctly (last seven counters report bogus values).
1221 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1222 * beginning with that firmware version. Another bug fix for 32-bit
1223 * tallies in 1.4.0; should 16-bit tallies be used for some other
1224 * versions, too? */
1225 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1226 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1227 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1228 "failed\n", dev->name);
1229 local->tallies32 = 0;
1230 } else
1231 local->tallies32 = 1;
1232 } else
1233 local->tallies32 = 0;
1234
1235 hostap_set_auth_algs(local);
1236
1237 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1238 local->fragm_threshold)) {
1239 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1240 "failed\n", dev->name, local->fragm_threshold);
1241 }
1242
1243 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1244 local->rts_threshold)) {
1245 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1246 dev->name, local->rts_threshold);
1247 }
1248
1249 if (local->manual_retry_count >= 0 &&
1250 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1251 local->manual_retry_count)) {
1252 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1253 dev->name, local->manual_retry_count);
1254 }
1255
1256 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1257 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1258 local->rssi_to_dBm = le16_to_cpu(tmp);
1259 }
1260
1261 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1262 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1263 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1264 dev->name);
1265 }
1266
1267 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1268 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1269 local->generic_elem, local->generic_elem_len)) {
1270 printk(KERN_INFO "%s: setting genericElement failed\n",
1271 dev->name);
1272 }
1273
1274 fail:
1275 return ret;
1276}
1277
1278
1279static int prism2_hw_init(struct net_device *dev, int initial)
1280{
1281 struct hostap_interface *iface;
1282 local_info_t *local;
1283 int ret, first = 1;
1284 unsigned long start, delay;
1285
1286 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1287
1288 iface = netdev_priv(dev);
1289 local = iface->local;
1290
1291 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1292
1293 init:
1294 /* initialize HFA 384x */
1295 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1296 if (ret) {
1297 printk(KERN_INFO "%s: first command failed - assuming card "
1298 "does not have primary firmware\n", dev_info);
1299 }
1300
1301 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1302 /* EvStat has Cmd bit set in some cases, so retry once if no
1303 * wait was needed */
1304 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1305 printk(KERN_DEBUG "%s: init command completed too quickly - "
1306 "retrying\n", dev->name);
1307 first = 0;
1308 goto init;
1309 }
1310
1311 start = jiffies;
1312 delay = jiffies + HFA384X_INIT_TIMEOUT;
1313 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1314 time_before(jiffies, delay))
1315 yield();
1316 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1317 printk(KERN_DEBUG "%s: assuming no Primary image in "
1318 "flash - card initialization not completed\n",
1319 dev_info);
1320 local->no_pri = 1;
1321#ifdef PRISM2_DOWNLOAD_SUPPORT
1322 if (local->sram_type == -1)
1323 local->sram_type = prism2_get_ram_size(local);
1324#endif /* PRISM2_DOWNLOAD_SUPPORT */
1325 return 1;
1326 }
1327 local->no_pri = 0;
1328 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1329 (jiffies - start) * 1000 / HZ);
1330 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1331 return 0;
1332}
1333
1334
1335static int prism2_hw_init2(struct net_device *dev, int initial)
1336{
1337 struct hostap_interface *iface;
1338 local_info_t *local;
1339 int i;
1340
1341 iface = netdev_priv(dev);
1342 local = iface->local;
1343
1344#ifdef PRISM2_DOWNLOAD_SUPPORT
1345 kfree(local->pda);
1346 if (local->no_pri)
1347 local->pda = NULL;
1348 else
1349 local->pda = prism2_read_pda(dev);
1350#endif /* PRISM2_DOWNLOAD_SUPPORT */
1351
1352 hfa384x_disable_interrupts(dev);
1353
1354#ifndef final_version
1355 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1356 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1357 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1358 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1359 goto failed;
1360 }
1361#endif
1362
1363 if (initial || local->pri_only) {
1364 hfa384x_events_only_cmd(dev);
1365 /* get card version information */
1366 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1367 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1368 hfa384x_disable_interrupts(dev);
1369 goto failed;
1370 }
1371
1372 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1373 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1374 "- only Primary f/w present\n", dev->name);
1375 local->pri_only = 1;
1376 return 0;
1377 }
1378 local->pri_only = 0;
1379 hfa384x_disable_interrupts(dev);
1380 }
1381
1382 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1383 * enable interrupts before this. This would also require some sort of
1384 * sleeping AllocEv waiting */
1385
1386 /* allocate TX FIDs */
1387 local->txfid_len = PRISM2_TXFID_LEN;
1388 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1389 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1390 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1391 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1392 if (local->txfid[i] != 0xffff) {
1393 printk(KERN_DEBUG "%s: Using shorter TX FID "
1394 "(1600 bytes)\n", dev->name);
1395 local->txfid_len = 1600;
1396 }
1397 }
1398 if (local->txfid[i] == 0xffff)
1399 goto failed;
1400 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1401 }
1402
1403 hfa384x_events_only_cmd(dev);
1404
1405 if (initial) {
1406 u8 addr[ETH_ALEN] = {};
1407 struct list_head *ptr;
1408
1409 prism2_check_sta_fw_version(local);
1410
1411 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1412 addr, ETH_ALEN, 1) < 0) {
1413 printk("%s: could not get own MAC address\n",
1414 dev->name);
1415 }
1416 eth_hw_addr_set(dev, addr);
1417 list_for_each(ptr, &local->hostap_interfaces) {
1418 iface = list_entry(ptr, struct hostap_interface, list);
1419 eth_hw_addr_inherit(iface->dev, dev);
1420 }
1421 } else if (local->fw_ap)
1422 prism2_check_sta_fw_version(local);
1423
1424 prism2_setup_rids(dev);
1425
1426 /* MAC is now configured, but port 0 is not yet enabled */
1427 return 0;
1428
1429 failed:
1430 if (!local->no_pri)
1431 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1432 return 1;
1433}
1434
1435
1436static int prism2_hw_enable(struct net_device *dev, int initial)
1437{
1438 struct hostap_interface *iface;
1439 local_info_t *local;
1440 int was_resetting;
1441
1442 iface = netdev_priv(dev);
1443 local = iface->local;
1444 was_resetting = local->hw_resetting;
1445
1446 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1447 printk("%s: MAC port 0 enabling failed\n", dev->name);
1448 return 1;
1449 }
1450
1451 local->hw_ready = 1;
1452 local->hw_reset_tries = 0;
1453 local->hw_resetting = 0;
1454 hfa384x_enable_interrupts(dev);
1455
1456 /* at least D-Link DWL-650 seems to require additional port reset
1457 * before it starts acting as an AP, so reset port automatically
1458 * here just in case */
1459 if (initial && prism2_reset_port(dev)) {
1460 printk("%s: MAC port 0 resetting failed\n", dev->name);
1461 return 1;
1462 }
1463
1464 if (was_resetting && netif_queue_stopped(dev)) {
1465 /* If hw_reset() was called during pending transmit, netif
1466 * queue was stopped. Wake it up now since the wlan card has
1467 * been resetted. */
1468 netif_wake_queue(dev);
1469 }
1470
1471 return 0;
1472}
1473
1474
1475static int prism2_hw_config(struct net_device *dev, int initial)
1476{
1477 struct hostap_interface *iface;
1478 local_info_t *local;
1479
1480 iface = netdev_priv(dev);
1481 local = iface->local;
1482
1483 if (local->hw_downloading)
1484 return 1;
1485
1486 if (prism2_hw_init(dev, initial)) {
1487 return local->no_pri ? 0 : 1;
1488 }
1489
1490 if (prism2_hw_init2(dev, initial))
1491 return 1;
1492
1493 /* Enable firmware if secondary image is loaded and at least one of the
1494 * netdevices is up. */
1495 if (!local->pri_only &&
1496 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1497 if (!local->dev_enabled)
1498 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1499 local->dev_enabled = 1;
1500 return prism2_hw_enable(dev, initial);
1501 }
1502
1503 return 0;
1504}
1505
1506
1507static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1508{
1509 struct hostap_interface *iface;
1510 local_info_t *local;
1511
1512 iface = netdev_priv(dev);
1513 local = iface->local;
1514
1515 /* Allow only command completion events during disable */
1516 hfa384x_events_only_cmd(dev);
1517
1518 local->hw_ready = 0;
1519 if (local->dev_enabled)
1520 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1521 local->dev_enabled = 0;
1522
1523 if (local->func->card_present && !local->func->card_present(local)) {
1524 printk(KERN_DEBUG "%s: card already removed or not configured "
1525 "during shutdown\n", dev->name);
1526 return;
1527 }
1528
1529 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1530 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1531 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1532
1533 hfa384x_disable_interrupts(dev);
1534
1535 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1536 hfa384x_events_only_cmd(dev);
1537 else
1538 prism2_clear_cmd_queue(local);
1539}
1540
1541
1542static void prism2_hw_reset(struct net_device *dev)
1543{
1544 struct hostap_interface *iface;
1545 local_info_t *local;
1546
1547#if 0
1548 static long last_reset = 0;
1549
1550 /* do not reset card more than once per second to avoid ending up in a
1551 * busy loop resetting the card */
1552 if (time_before_eq(jiffies, last_reset + HZ))
1553 return;
1554 last_reset = jiffies;
1555#endif
1556
1557 iface = netdev_priv(dev);
1558 local = iface->local;
1559
1560 if (local->hw_downloading)
1561 return;
1562
1563 if (local->hw_resetting) {
1564 printk(KERN_WARNING "%s: %s: already resetting card - "
1565 "ignoring reset request\n", dev_info, dev->name);
1566 return;
1567 }
1568
1569 local->hw_reset_tries++;
1570 if (local->hw_reset_tries > 10) {
1571 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1572 dev->name);
1573 return;
1574 }
1575
1576 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1577 hfa384x_disable_interrupts(dev);
1578 local->hw_resetting = 1;
1579 if (local->func->cor_sreset) {
1580 /* Host system seems to hang in some cases with high traffic
1581 * load or shared interrupts during COR sreset. Disable shared
1582 * interrupts during reset to avoid these crashes. COS sreset
1583 * takes quite a long time, so it is unfortunate that this
1584 * seems to be needed. Anyway, I do not know of any better way
1585 * of avoiding the crash. */
1586 disable_irq(dev->irq);
1587 local->func->cor_sreset(local);
1588 enable_irq(dev->irq);
1589 }
1590 prism2_hw_shutdown(dev, 1);
1591 prism2_hw_config(dev, 0);
1592 local->hw_resetting = 0;
1593
1594#ifdef PRISM2_DOWNLOAD_SUPPORT
1595 if (local->dl_pri) {
1596 printk(KERN_DEBUG "%s: persistent download of primary "
1597 "firmware\n", dev->name);
1598 if (prism2_download_genesis(local, local->dl_pri) < 0)
1599 printk(KERN_WARNING "%s: download (PRI) failed\n",
1600 dev->name);
1601 }
1602
1603 if (local->dl_sec) {
1604 printk(KERN_DEBUG "%s: persistent download of secondary "
1605 "firmware\n", dev->name);
1606 if (prism2_download_volatile(local, local->dl_sec) < 0)
1607 printk(KERN_WARNING "%s: download (SEC) failed\n",
1608 dev->name);
1609 }
1610#endif /* PRISM2_DOWNLOAD_SUPPORT */
1611
1612 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1613}
1614
1615
1616static void prism2_schedule_reset(local_info_t *local)
1617{
1618 schedule_work(&local->reset_queue);
1619}
1620
1621
1622/* Called only as scheduled task after noticing card timeout in interrupt
1623 * context */
1624static void handle_reset_queue(struct work_struct *work)
1625{
1626 local_info_t *local = container_of(work, local_info_t, reset_queue);
1627
1628 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1629 prism2_hw_reset(local->dev);
1630
1631 if (netif_queue_stopped(local->dev)) {
1632 int i;
1633
1634 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1635 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1636 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1637 "wake up queue\n");
1638 netif_wake_queue(local->dev);
1639 break;
1640 }
1641 }
1642}
1643
1644
1645static int prism2_get_txfid_idx(local_info_t *local)
1646{
1647 int idx, end;
1648 unsigned long flags;
1649
1650 spin_lock_irqsave(&local->txfidlock, flags);
1651 end = idx = local->next_txfid;
1652 do {
1653 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1654 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1655 spin_unlock_irqrestore(&local->txfidlock, flags);
1656 return idx;
1657 }
1658 idx++;
1659 if (idx >= PRISM2_TXFID_COUNT)
1660 idx = 0;
1661 } while (idx != end);
1662 spin_unlock_irqrestore(&local->txfidlock, flags);
1663
1664 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1665 "packet dropped\n");
1666 local->dev->stats.tx_dropped++;
1667
1668 return -1;
1669}
1670
1671
1672/* Called only from hardware IRQ */
1673static void prism2_transmit_cb(struct net_device *dev, long context,
1674 u16 resp0, u16 res)
1675{
1676 struct hostap_interface *iface;
1677 local_info_t *local;
1678 int idx = (int) context;
1679
1680 iface = netdev_priv(dev);
1681 local = iface->local;
1682
1683 if (res) {
1684 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1685 dev->name, res);
1686 return;
1687 }
1688
1689 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1690 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1691 "idx=%d\n", dev->name, idx);
1692 return;
1693 }
1694
1695 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1696 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1697 "with no pending transmit\n", dev->name);
1698 }
1699
1700 if (netif_queue_stopped(dev)) {
1701 /* ready for next TX, so wake up queue that was stopped in
1702 * prism2_transmit() */
1703 netif_wake_queue(dev);
1704 }
1705
1706 spin_lock(&local->txfidlock);
1707
1708 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1709 * will be automatically allocated for the next TX frame */
1710 local->intransmitfid[idx] = resp0;
1711
1712 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1713 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1714 dev->name, idx, local->txfid[idx],
1715 resp0, local->intransmitfid[local->next_txfid]);
1716
1717 idx++;
1718 if (idx >= PRISM2_TXFID_COUNT)
1719 idx = 0;
1720 local->next_txfid = idx;
1721
1722 /* check if all TX buffers are occupied */
1723 do {
1724 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1725 spin_unlock(&local->txfidlock);
1726 return;
1727 }
1728 idx++;
1729 if (idx >= PRISM2_TXFID_COUNT)
1730 idx = 0;
1731 } while (idx != local->next_txfid);
1732 spin_unlock(&local->txfidlock);
1733
1734 /* no empty TX buffers, stop queue */
1735 netif_stop_queue(dev);
1736}
1737
1738
1739/* Called only from software IRQ if PCI bus master is not used (with bus master
1740 * this can be called both from software and hardware IRQ) */
1741static int prism2_transmit(struct net_device *dev, int idx)
1742{
1743 struct hostap_interface *iface;
1744 local_info_t *local;
1745 int res;
1746
1747 iface = netdev_priv(dev);
1748 local = iface->local;
1749
1750 /* The driver tries to stop netif queue so that there would not be
1751 * more than one attempt to transmit frames going on; check that this
1752 * is really the case */
1753
1754 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1755 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1756 "when previous TX was pending\n", dev->name);
1757 return -1;
1758 }
1759
1760 /* stop the queue for the time that transmit is pending */
1761 netif_stop_queue(dev);
1762
1763 /* transmit packet */
1764 res = hfa384x_cmd_callback(
1765 dev,
1766 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1767 local->txfid[idx],
1768 prism2_transmit_cb, (long) idx);
1769
1770 if (res) {
1771 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1772 "failed (res=%d)\n", dev->name, res);
1773 dev->stats.tx_dropped++;
1774 netif_wake_queue(dev);
1775 return -1;
1776 }
1777 netif_trans_update(dev);
1778
1779 /* Since we did not wait for command completion, the card continues
1780 * to process on the background and we will finish handling when
1781 * command completion event is handled (prism2_cmd_ev() function) */
1782
1783 return 0;
1784}
1785
1786
1787/* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1788 * send the payload with this descriptor) */
1789/* Called only from software IRQ */
1790static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1791{
1792 struct hostap_interface *iface;
1793 local_info_t *local;
1794 struct hfa384x_tx_frame txdesc;
1795 struct hostap_skb_tx_data *meta;
1796 int hdr_len, data_len, idx, res, ret = -1;
1797 u16 tx_control;
1798
1799 iface = netdev_priv(dev);
1800 local = iface->local;
1801
1802 meta = (struct hostap_skb_tx_data *) skb->cb;
1803
1804 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1805
1806 if ((local->func->card_present && !local->func->card_present(local)) ||
1807 !local->hw_ready || local->hw_downloading || local->pri_only) {
1808 if (net_ratelimit()) {
1809 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1810 " skipping\n", dev->name);
1811 }
1812 goto fail;
1813 }
1814
1815 memset(&txdesc, 0, sizeof(txdesc));
1816
1817 /* skb->data starts with txdesc->frame_control */
1818 hdr_len = sizeof(txdesc.header);
1819 BUILD_BUG_ON(hdr_len != 24);
1820 skb_copy_from_linear_data(skb, &txdesc.header, hdr_len);
1821 if (ieee80211_is_data(txdesc.frame_control) &&
1822 ieee80211_has_a4(txdesc.frame_control) &&
1823 skb->len >= 30) {
1824 /* Addr4 */
1825 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1826 ETH_ALEN);
1827 hdr_len += ETH_ALEN;
1828 }
1829
1830 tx_control = local->tx_control;
1831 if (meta->tx_cb_idx) {
1832 tx_control |= HFA384X_TX_CTRL_TX_OK;
1833 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1834 }
1835 txdesc.tx_control = cpu_to_le16(tx_control);
1836 txdesc.tx_rate = meta->rate;
1837
1838 data_len = skb->len - hdr_len;
1839 txdesc.data_len = cpu_to_le16(data_len);
1840 txdesc.len = cpu_to_be16(data_len);
1841
1842 idx = prism2_get_txfid_idx(local);
1843 if (idx < 0)
1844 goto fail;
1845
1846 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1847 hostap_dump_tx_header(dev->name, &txdesc);
1848
1849 spin_lock(&local->baplock);
1850 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1851
1852 if (!res)
1853 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1854 if (!res)
1855 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1856 skb->len - hdr_len);
1857 spin_unlock(&local->baplock);
1858
1859 if (!res)
1860 res = prism2_transmit(dev, idx);
1861 if (res) {
1862 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1863 dev->name);
1864 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1865 schedule_work(&local->reset_queue);
1866 goto fail;
1867 }
1868
1869 ret = 0;
1870
1871fail:
1872 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1873 return ret;
1874}
1875
1876
1877/* Some SMP systems have reported number of odd errors with hostap_pci. fid
1878 * register has changed values between consecutive reads for an unknown reason.
1879 * This should really not happen, so more debugging is needed. This test
1880 * version is a bit slower, but it will detect most of such register changes
1881 * and will try to get the correct fid eventually. */
1882#define EXTRA_FID_READ_TESTS
1883
1884static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1885{
1886#ifdef EXTRA_FID_READ_TESTS
1887 u16 val, val2, val3;
1888 int i;
1889
1890 for (i = 0; i < 10; i++) {
1891 val = HFA384X_INW(reg);
1892 val2 = HFA384X_INW(reg);
1893 val3 = HFA384X_INW(reg);
1894
1895 if (val == val2 && val == val3)
1896 return val;
1897
1898 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1899 " %04x %04x %04x\n",
1900 dev->name, i, reg, val, val2, val3);
1901 if ((val == val2 || val == val3) && val != 0)
1902 return val;
1903 if (val2 == val3 && val2 != 0)
1904 return val2;
1905 }
1906 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1907 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1908 return val;
1909#else /* EXTRA_FID_READ_TESTS */
1910 return HFA384X_INW(reg);
1911#endif /* EXTRA_FID_READ_TESTS */
1912}
1913
1914
1915/* Called only as a tasklet (software IRQ) */
1916static void prism2_rx(local_info_t *local)
1917{
1918 struct net_device *dev = local->dev;
1919 int res, rx_pending = 0;
1920 u16 len, hdr_len, rxfid, status, macport;
1921 struct hfa384x_rx_frame rxdesc;
1922 struct sk_buff *skb = NULL;
1923
1924 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1925
1926 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1927#ifndef final_version
1928 if (rxfid == 0) {
1929 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1930 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1931 rxfid);
1932 if (rxfid == 0) {
1933 schedule_work(&local->reset_queue);
1934 goto rx_dropped;
1935 }
1936 /* try to continue with the new rxfid value */
1937 }
1938#endif
1939
1940 spin_lock(&local->baplock);
1941 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1942 if (!res)
1943 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1944
1945 if (res) {
1946 spin_unlock(&local->baplock);
1947 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1948 res);
1949 if (res == -ETIMEDOUT) {
1950 schedule_work(&local->reset_queue);
1951 }
1952 goto rx_dropped;
1953 }
1954
1955 len = le16_to_cpu(rxdesc.data_len);
1956 hdr_len = sizeof(rxdesc);
1957 status = le16_to_cpu(rxdesc.status);
1958 macport = (status >> 8) & 0x07;
1959
1960 /* Drop frames with too large reported payload length. Monitor mode
1961 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1962 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1963 * macport 7 */
1964 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1965 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1966 if (len >= (u16) -14) {
1967 hdr_len -= 65535 - len;
1968 hdr_len--;
1969 }
1970 len = 0;
1971 } else {
1972 spin_unlock(&local->baplock);
1973 printk(KERN_DEBUG "%s: Received frame with invalid "
1974 "length 0x%04x\n", dev->name, len);
1975 hostap_dump_rx_header(dev->name, &rxdesc);
1976 goto rx_dropped;
1977 }
1978 }
1979
1980 skb = dev_alloc_skb(len + hdr_len);
1981 if (!skb) {
1982 spin_unlock(&local->baplock);
1983 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1984 dev->name);
1985 goto rx_dropped;
1986 }
1987 skb->dev = dev;
1988 skb_put_data(skb, &rxdesc, hdr_len);
1989
1990 if (len > 0)
1991 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
1992 spin_unlock(&local->baplock);
1993 if (res) {
1994 printk(KERN_DEBUG "%s: RX failed to read "
1995 "frame data\n", dev->name);
1996 goto rx_dropped;
1997 }
1998
1999 skb_queue_tail(&local->rx_list, skb);
2000 tasklet_schedule(&local->rx_tasklet);
2001
2002 rx_exit:
2003 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2004 if (!rx_pending) {
2005 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2006 }
2007
2008 return;
2009
2010 rx_dropped:
2011 dev->stats.rx_dropped++;
2012 if (skb)
2013 dev_kfree_skb(skb);
2014 goto rx_exit;
2015}
2016
2017
2018/* Called only as a tasklet (software IRQ) */
2019static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2020{
2021 struct hfa384x_rx_frame *rxdesc;
2022 struct net_device *dev = skb->dev;
2023 struct hostap_80211_rx_status stats;
2024 int hdrlen, rx_hdrlen;
2025
2026 rx_hdrlen = sizeof(*rxdesc);
2027 if (skb->len < sizeof(*rxdesc)) {
2028 /* Allow monitor mode to receive shorter frames */
2029 if (local->iw_mode == IW_MODE_MONITOR &&
2030 skb->len >= sizeof(*rxdesc) - 30) {
2031 rx_hdrlen = skb->len;
2032 } else {
2033 dev_kfree_skb(skb);
2034 return;
2035 }
2036 }
2037
2038 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2039
2040 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2041 skb->len >= sizeof(*rxdesc))
2042 hostap_dump_rx_header(dev->name, rxdesc);
2043
2044 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2045 (!local->monitor_allow_fcserr ||
2046 local->iw_mode != IW_MODE_MONITOR))
2047 goto drop;
2048
2049 if (skb->len > PRISM2_DATA_MAXLEN) {
2050 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2051 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2052 goto drop;
2053 }
2054
2055 stats.mac_time = le32_to_cpu(rxdesc->time);
2056 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2057 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2058 stats.rate = rxdesc->rate;
2059
2060 /* Convert Prism2 RX structure into IEEE 802.11 header */
2061 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2062 if (hdrlen > rx_hdrlen)
2063 hdrlen = rx_hdrlen;
2064
2065 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2066 &rxdesc->frame_control, hdrlen);
2067
2068 hostap_80211_rx(dev, skb, &stats);
2069 return;
2070
2071 drop:
2072 dev_kfree_skb(skb);
2073}
2074
2075
2076/* Called only as a tasklet (software IRQ) */
2077static void hostap_rx_tasklet(struct tasklet_struct *t)
2078{
2079 local_info_t *local = from_tasklet(local, t, rx_tasklet);
2080 struct sk_buff *skb;
2081
2082 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2083 hostap_rx_skb(local, skb);
2084}
2085
2086
2087/* Called only from hardware IRQ */
2088static void prism2_alloc_ev(struct net_device *dev)
2089{
2090 struct hostap_interface *iface;
2091 local_info_t *local;
2092 int idx;
2093 u16 fid;
2094
2095 iface = netdev_priv(dev);
2096 local = iface->local;
2097
2098 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2099
2100 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2101
2102 spin_lock(&local->txfidlock);
2103 idx = local->next_alloc;
2104
2105 do {
2106 if (local->txfid[idx] == fid) {
2107 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2108 idx);
2109
2110#ifndef final_version
2111 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2112 printk("Already released txfid found at idx "
2113 "%d\n", idx);
2114 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2115 printk("Already reserved txfid found at idx "
2116 "%d\n", idx);
2117#endif
2118 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2119 idx++;
2120 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2121 idx;
2122
2123 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2124 netif_queue_stopped(dev))
2125 netif_wake_queue(dev);
2126
2127 spin_unlock(&local->txfidlock);
2128 return;
2129 }
2130
2131 idx++;
2132 if (idx >= PRISM2_TXFID_COUNT)
2133 idx = 0;
2134 } while (idx != local->next_alloc);
2135
2136 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2137 "read 0x%04x) for alloc event\n", dev->name, fid,
2138 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2139 printk(KERN_DEBUG "TXFIDs:");
2140 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2141 printk(" %04x[%04x]", local->txfid[idx],
2142 local->intransmitfid[idx]);
2143 printk("\n");
2144 spin_unlock(&local->txfidlock);
2145
2146 /* FIX: should probably schedule reset; reference to one txfid was lost
2147 * completely.. Bad things will happen if we run out of txfids
2148 * Actually, this will cause netdev watchdog to notice TX timeout and
2149 * then card reset after all txfids have been leaked. */
2150}
2151
2152
2153/* Called only as a tasklet (software IRQ) */
2154static void hostap_tx_callback(local_info_t *local,
2155 struct hfa384x_tx_frame *txdesc, int ok,
2156 char *payload)
2157{
2158 u16 sw_support, hdrlen, len;
2159 struct sk_buff *skb;
2160 struct hostap_tx_callback_info *cb;
2161
2162 /* Make sure that frame was from us. */
2163 if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2164 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2165 local->dev->name);
2166 return;
2167 }
2168
2169 sw_support = le32_to_cpu(txdesc->sw_support);
2170
2171 spin_lock(&local->lock);
2172 cb = local->tx_callback;
2173 while (cb != NULL && cb->idx != sw_support)
2174 cb = cb->next;
2175 spin_unlock(&local->lock);
2176
2177 if (cb == NULL) {
2178 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2179 local->dev->name, sw_support);
2180 return;
2181 }
2182
2183 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2184 len = le16_to_cpu(txdesc->data_len);
2185 skb = dev_alloc_skb(hdrlen + len);
2186 if (skb == NULL) {
2187 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2188 "skb\n", local->dev->name);
2189 return;
2190 }
2191
2192 skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2193 if (payload)
2194 skb_put_data(skb, payload, len);
2195
2196 skb->dev = local->dev;
2197 skb_reset_mac_header(skb);
2198
2199 cb->func(skb, ok, cb->data);
2200}
2201
2202
2203/* Called only as a tasklet (software IRQ) */
2204static int hostap_tx_compl_read(local_info_t *local, int error,
2205 struct hfa384x_tx_frame *txdesc,
2206 char **payload)
2207{
2208 u16 fid, len;
2209 int res, ret = 0;
2210 struct net_device *dev = local->dev;
2211
2212 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2213
2214 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2215
2216 spin_lock(&local->baplock);
2217 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2218 if (!res)
2219 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2220 if (res) {
2221 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2222 "read txdesc\n", dev->name, error, fid);
2223 if (res == -ETIMEDOUT) {
2224 schedule_work(&local->reset_queue);
2225 }
2226 ret = -1;
2227 goto fail;
2228 }
2229 if (txdesc->sw_support) {
2230 len = le16_to_cpu(txdesc->data_len);
2231 if (len < PRISM2_DATA_MAXLEN) {
2232 *payload = kmalloc(len, GFP_ATOMIC);
2233 if (*payload == NULL ||
2234 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2235 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2236 "frame payload\n", dev->name);
2237 kfree(*payload);
2238 *payload = NULL;
2239 ret = -1;
2240 goto fail;
2241 }
2242 }
2243 }
2244
2245 fail:
2246 spin_unlock(&local->baplock);
2247
2248 return ret;
2249}
2250
2251
2252/* Called only as a tasklet (software IRQ) */
2253static void prism2_tx_ev(local_info_t *local)
2254{
2255 struct net_device *dev = local->dev;
2256 char *payload = NULL;
2257 struct hfa384x_tx_frame txdesc;
2258
2259 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2260 goto fail;
2261
2262 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2263 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2264 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2265 "duration_id=%d\n",
2266 dev->name, le16_to_cpu(txdesc.status),
2267 txdesc.retry_count, txdesc.tx_rate,
2268 le16_to_cpu(txdesc.seq_ctrl),
2269 le16_to_cpu(txdesc.duration_id));
2270 }
2271
2272 if (txdesc.sw_support)
2273 hostap_tx_callback(local, &txdesc, 1, payload);
2274 kfree(payload);
2275
2276 fail:
2277 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2278}
2279
2280
2281/* Called only as a tasklet (software IRQ) */
2282static void hostap_sta_tx_exc_tasklet(struct tasklet_struct *t)
2283{
2284 local_info_t *local = from_tasklet(local, t, sta_tx_exc_tasklet);
2285 struct sk_buff *skb;
2286
2287 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2288 struct hfa384x_tx_frame *txdesc =
2289 (struct hfa384x_tx_frame *) skb->data;
2290
2291 if (skb->len >= sizeof(*txdesc)) {
2292 /* Convert Prism2 RX structure into IEEE 802.11 header
2293 */
2294 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2295 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2296 &txdesc->frame_control, hdrlen);
2297
2298 hostap_handle_sta_tx_exc(local, skb);
2299 }
2300 dev_kfree_skb(skb);
2301 }
2302}
2303
2304
2305/* Called only as a tasklet (software IRQ) */
2306static void prism2_txexc(local_info_t *local)
2307{
2308 struct net_device *dev = local->dev;
2309 u16 status, fc;
2310 int show_dump, res;
2311 char *payload = NULL;
2312 struct hfa384x_tx_frame txdesc;
2313
2314 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2315 dev->stats.tx_errors++;
2316
2317 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2318 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2319 if (res)
2320 return;
2321
2322 status = le16_to_cpu(txdesc.status);
2323
2324 /* We produce a TXDROP event only for retry or lifetime
2325 * exceeded, because that's the only status that really mean
2326 * that this particular node went away.
2327 * Other errors means that *we* screwed up. - Jean II */
2328 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2329 {
2330 union iwreq_data wrqu;
2331
2332 /* Copy 802.11 dest address. */
2333 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2334 wrqu.addr.sa_family = ARPHRD_ETHER;
2335 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2336 } else
2337 show_dump = 1;
2338
2339 if (local->iw_mode == IW_MODE_MASTER ||
2340 local->iw_mode == IW_MODE_REPEAT ||
2341 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2342 struct sk_buff *skb;
2343 skb = dev_alloc_skb(sizeof(txdesc));
2344 if (skb) {
2345 skb_put_data(skb, &txdesc, sizeof(txdesc));
2346 skb_queue_tail(&local->sta_tx_exc_list, skb);
2347 tasklet_schedule(&local->sta_tx_exc_tasklet);
2348 }
2349 }
2350
2351 if (txdesc.sw_support)
2352 hostap_tx_callback(local, &txdesc, 0, payload);
2353 kfree(payload);
2354
2355 if (!show_dump)
2356 return;
2357
2358 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2359 " tx_control=%04x\n",
2360 dev->name, status,
2361 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2362 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2363 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2364 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2365 le16_to_cpu(txdesc.tx_control));
2366
2367 fc = le16_to_cpu(txdesc.frame_control);
2368 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2369 "(%s%s%s::%d%s%s)\n",
2370 txdesc.retry_count, txdesc.tx_rate, fc,
2371 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2372 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2373 ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2374 (fc & IEEE80211_FCTL_STYPE) >> 4,
2375 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2376 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2377 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2378 txdesc.addr1, txdesc.addr2,
2379 txdesc.addr3, txdesc.addr4);
2380}
2381
2382
2383/* Called only as a tasklet (software IRQ) */
2384static void hostap_info_tasklet(struct tasklet_struct *t)
2385{
2386 local_info_t *local = from_tasklet(local, t, info_tasklet);
2387 struct sk_buff *skb;
2388
2389 while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2390 hostap_info_process(local, skb);
2391 dev_kfree_skb(skb);
2392 }
2393}
2394
2395
2396/* Called only as a tasklet (software IRQ) */
2397static void prism2_info(local_info_t *local)
2398{
2399 struct net_device *dev = local->dev;
2400 u16 fid;
2401 int res, left;
2402 struct hfa384x_info_frame info;
2403 struct sk_buff *skb;
2404
2405 fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2406
2407 spin_lock(&local->baplock);
2408 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2409 if (!res)
2410 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2411 if (res) {
2412 spin_unlock(&local->baplock);
2413 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2414 fid);
2415 if (res == -ETIMEDOUT) {
2416 schedule_work(&local->reset_queue);
2417 }
2418 goto out;
2419 }
2420
2421 left = (le16_to_cpu(info.len) - 1) * 2;
2422
2423 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2424 /* data register seems to give 0x8000 in some error cases even
2425 * though busy bit is not set in offset register;
2426 * in addition, length must be at least 1 due to type field */
2427 spin_unlock(&local->baplock);
2428 printk(KERN_DEBUG "%s: Received info frame with invalid "
2429 "length 0x%04x (type 0x%04x)\n", dev->name,
2430 le16_to_cpu(info.len), le16_to_cpu(info.type));
2431 goto out;
2432 }
2433
2434 skb = dev_alloc_skb(sizeof(info) + left);
2435 if (skb == NULL) {
2436 spin_unlock(&local->baplock);
2437 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2438 "frame\n", dev->name);
2439 goto out;
2440 }
2441
2442 skb_put_data(skb, &info, sizeof(info));
2443 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2444 {
2445 spin_unlock(&local->baplock);
2446 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2447 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2448 le16_to_cpu(info.len), le16_to_cpu(info.type));
2449 dev_kfree_skb(skb);
2450 goto out;
2451 }
2452 spin_unlock(&local->baplock);
2453
2454 skb_queue_tail(&local->info_list, skb);
2455 tasklet_schedule(&local->info_tasklet);
2456
2457 out:
2458 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2459}
2460
2461
2462/* Called only as a tasklet (software IRQ) */
2463static void hostap_bap_tasklet(struct tasklet_struct *t)
2464{
2465 local_info_t *local = from_tasklet(local, t, bap_tasklet);
2466 struct net_device *dev = local->dev;
2467 u16 ev;
2468 int frames = 30;
2469
2470 if (local->func->card_present && !local->func->card_present(local))
2471 return;
2472
2473 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2474
2475 /* Process all pending BAP events without generating new interrupts
2476 * for them */
2477 while (frames-- > 0) {
2478 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2479 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2480 break;
2481 if (ev & HFA384X_EV_RX)
2482 prism2_rx(local);
2483 if (ev & HFA384X_EV_INFO)
2484 prism2_info(local);
2485 if (ev & HFA384X_EV_TX)
2486 prism2_tx_ev(local);
2487 if (ev & HFA384X_EV_TXEXC)
2488 prism2_txexc(local);
2489 }
2490
2491 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2492 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2493
2494 /* Enable interrupts for new BAP events */
2495 hfa384x_events_all(dev);
2496 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2497}
2498
2499
2500/* Called only from hardware IRQ */
2501static void prism2_infdrop(struct net_device *dev)
2502{
2503 static unsigned long last_inquire = 0;
2504
2505 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2506
2507 /* some firmware versions seem to get stuck with
2508 * full CommTallies in high traffic load cases; every
2509 * packet will then cause INFDROP event and CommTallies
2510 * info frame will not be sent automatically. Try to
2511 * get out of this state by inquiring CommTallies. */
2512 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2513 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2514 HFA384X_INFO_COMMTALLIES, NULL, 0);
2515 last_inquire = jiffies;
2516 }
2517}
2518
2519
2520/* Called only from hardware IRQ */
2521static void prism2_ev_tick(struct net_device *dev)
2522{
2523 struct hostap_interface *iface;
2524 local_info_t *local;
2525 u16 evstat, inten;
2526 static int prev_stuck = 0;
2527
2528 iface = netdev_priv(dev);
2529 local = iface->local;
2530
2531 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2532 local->last_tick_timer) {
2533 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2534 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2535 if (!prev_stuck) {
2536 printk(KERN_INFO "%s: SW TICK stuck? "
2537 "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2538 dev->name, local->bits, evstat, inten);
2539 }
2540 local->sw_tick_stuck++;
2541 if ((evstat & HFA384X_BAP0_EVENTS) &&
2542 (inten & HFA384X_BAP0_EVENTS)) {
2543 printk(KERN_INFO "%s: trying to recover from IRQ "
2544 "hang\n", dev->name);
2545 hfa384x_events_no_bap0(dev);
2546 }
2547 prev_stuck = 1;
2548 } else
2549 prev_stuck = 0;
2550}
2551
2552
2553/* Called only from hardware IRQ */
2554static void prism2_check_magic(local_info_t *local)
2555{
2556 /* at least PCI Prism2.5 with bus mastering seems to sometimes
2557 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2558 * register once or twice seems to get the correct value.. PCI cards
2559 * cannot anyway be removed during normal operation, so there is not
2560 * really any need for this verification with them. */
2561
2562#ifndef PRISM2_PCI
2563#ifndef final_version
2564 static unsigned long last_magic_err = 0;
2565 struct net_device *dev = local->dev;
2566
2567 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2568 if (!local->hw_ready)
2569 return;
2570 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2571 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2572 printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2573 "%04X != %04X - card removed?\n", dev->name,
2574 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2575 HFA384X_MAGIC);
2576 last_magic_err = jiffies;
2577 } else if (net_ratelimit()) {
2578 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2579 "MAGIC=%04x\n", dev->name,
2580 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2581 HFA384X_MAGIC);
2582 }
2583 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2584 schedule_work(&local->reset_queue);
2585 return;
2586 }
2587#endif /* final_version */
2588#endif /* !PRISM2_PCI */
2589}
2590
2591
2592/* Called only from hardware IRQ */
2593static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2594{
2595 struct net_device *dev = dev_id;
2596 struct hostap_interface *iface;
2597 local_info_t *local;
2598 int events = 0;
2599 u16 ev;
2600
2601 iface = netdev_priv(dev);
2602 local = iface->local;
2603
2604 /* Detect early interrupt before driver is fully configured */
2605 spin_lock(&local->irq_init_lock);
2606 if (!dev->base_addr) {
2607 if (net_ratelimit()) {
2608 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2609 dev->name);
2610 }
2611 spin_unlock(&local->irq_init_lock);
2612 return IRQ_HANDLED;
2613 }
2614 spin_unlock(&local->irq_init_lock);
2615
2616 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2617
2618 if (local->func->card_present && !local->func->card_present(local)) {
2619 if (net_ratelimit()) {
2620 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2621 dev->name);
2622 }
2623 return IRQ_HANDLED;
2624 }
2625
2626 prism2_check_magic(local);
2627
2628 for (;;) {
2629 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2630 if (ev == 0xffff) {
2631 if (local->shutdown)
2632 return IRQ_HANDLED;
2633 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2634 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2635 dev->name);
2636 return IRQ_HANDLED;
2637 }
2638
2639 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2640 if (ev == 0)
2641 break;
2642
2643 if (ev & HFA384X_EV_CMD) {
2644 prism2_cmd_ev(dev);
2645 }
2646
2647 /* Above events are needed even before hw is ready, but other
2648 * events should be skipped during initialization. This may
2649 * change for AllocEv if allocate_fid is implemented without
2650 * busy waiting. */
2651 if (!local->hw_ready || local->hw_resetting ||
2652 !local->dev_enabled) {
2653 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2654 if (ev & HFA384X_EV_CMD)
2655 goto next_event;
2656 if ((ev & HFA384X_EVENT_MASK) == 0)
2657 return IRQ_HANDLED;
2658 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2659 net_ratelimit()) {
2660 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2661 "not ready; skipping events 0x%04x "
2662 "(IntEn=0x%04x)%s%s%s\n",
2663 dev->name, ev,
2664 HFA384X_INW(HFA384X_INTEN_OFF),
2665 !local->hw_ready ? " (!hw_ready)" : "",
2666 local->hw_resetting ?
2667 " (hw_resetting)" : "",
2668 !local->dev_enabled ?
2669 " (!dev_enabled)" : "");
2670 }
2671 HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2672 return IRQ_HANDLED;
2673 }
2674
2675 if (ev & HFA384X_EV_TICK) {
2676 prism2_ev_tick(dev);
2677 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2678 }
2679
2680 if (ev & HFA384X_EV_ALLOC) {
2681 prism2_alloc_ev(dev);
2682 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2683 }
2684
2685 /* Reading data from the card is quite time consuming, so do it
2686 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2687 * and unmasked after needed data has been read completely. */
2688 if (ev & HFA384X_BAP0_EVENTS) {
2689 hfa384x_events_no_bap0(dev);
2690 tasklet_schedule(&local->bap_tasklet);
2691 }
2692
2693#ifndef final_version
2694 if (ev & HFA384X_EV_WTERR) {
2695 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2696 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2697 }
2698#endif /* final_version */
2699
2700 if (ev & HFA384X_EV_INFDROP) {
2701 prism2_infdrop(dev);
2702 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2703 }
2704
2705 next_event:
2706 events++;
2707 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2708 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2709 "(EvStat=0x%04x)\n",
2710 PRISM2_MAX_INTERRUPT_EVENTS,
2711 HFA384X_INW(HFA384X_EVSTAT_OFF));
2712 break;
2713 }
2714 }
2715 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2716 return IRQ_RETVAL(events);
2717}
2718
2719
2720static void prism2_check_sta_fw_version(local_info_t *local)
2721{
2722 struct hfa384x_comp_ident comp;
2723 int id, variant, major, minor;
2724
2725 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2726 &comp, sizeof(comp), 1) < 0)
2727 return;
2728
2729 local->fw_ap = 0;
2730 id = le16_to_cpu(comp.id);
2731 if (id != HFA384X_COMP_ID_STA) {
2732 if (id == HFA384X_COMP_ID_FW_AP)
2733 local->fw_ap = 1;
2734 return;
2735 }
2736
2737 major = __le16_to_cpu(comp.major);
2738 minor = __le16_to_cpu(comp.minor);
2739 variant = __le16_to_cpu(comp.variant);
2740 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2741
2742 /* Station firmware versions before 1.4.x seem to have a bug in
2743 * firmware-based WEP encryption when using Host AP mode, so use
2744 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2745 * first one that has been seen to produce correct encryption, but the
2746 * bug might be fixed before that (although, at least 1.4.2 is broken).
2747 */
2748 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2749
2750 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2751 !local->fw_encrypt_ok) {
2752 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2753 "a workaround for firmware bug in Host AP mode WEP\n",
2754 local->dev->name);
2755 local->host_encrypt = 1;
2756 }
2757
2758 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2759 * in station firmware versions before 1.5.x. With these versions, the
2760 * driver uses a workaround with bogus frame format (4th address after
2761 * the payload). This is not compatible with other AP devices. Since
2762 * the firmware bug is fixed in the latest station firmware versions,
2763 * automatically enable standard compliant mode for cards using station
2764 * firmware version 1.5.0 or newer. */
2765 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2766 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2767 else {
2768 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2769 "workaround for firmware bug in Host AP mode WDS\n",
2770 local->dev->name);
2771 }
2772
2773 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2774}
2775
2776
2777static void hostap_passive_scan(struct timer_list *t)
2778{
2779 local_info_t *local = from_timer(local, t, passive_scan_timer);
2780 struct net_device *dev = local->dev;
2781 u16 chan;
2782
2783 if (local->passive_scan_interval <= 0)
2784 return;
2785
2786 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2787 int max_tries = 16;
2788
2789 /* Even though host system does not really know when the WLAN
2790 * MAC is sending frames, try to avoid changing channels for
2791 * passive scanning when a host-generated frame is being
2792 * transmitted */
2793 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2794 printk(KERN_DEBUG "%s: passive scan detected pending "
2795 "TX - delaying\n", dev->name);
2796 local->passive_scan_timer.expires = jiffies + HZ / 10;
2797 add_timer(&local->passive_scan_timer);
2798 return;
2799 }
2800
2801 do {
2802 local->passive_scan_channel++;
2803 if (local->passive_scan_channel > 14)
2804 local->passive_scan_channel = 1;
2805 max_tries--;
2806 } while (!(local->channel_mask &
2807 (1 << (local->passive_scan_channel - 1))) &&
2808 max_tries > 0);
2809
2810 if (max_tries == 0) {
2811 printk(KERN_INFO "%s: no allowed passive scan channels"
2812 " found\n", dev->name);
2813 return;
2814 }
2815
2816 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2817 dev->name, local->passive_scan_channel);
2818 chan = local->passive_scan_channel;
2819 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2820 local->passive_scan_timer.expires = jiffies + HZ / 10;
2821 } else {
2822 chan = local->channel;
2823 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2824 local->passive_scan_timer.expires = jiffies +
2825 local->passive_scan_interval * HZ;
2826 }
2827
2828 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2829 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2830 chan, NULL, 0))
2831 printk(KERN_ERR "%s: passive scan channel set %d "
2832 "failed\n", dev->name, chan);
2833
2834 add_timer(&local->passive_scan_timer);
2835}
2836
2837
2838/* Called only as a scheduled task when communications quality values should
2839 * be updated. */
2840static void handle_comms_qual_update(struct work_struct *work)
2841{
2842 local_info_t *local =
2843 container_of(work, local_info_t, comms_qual_update);
2844 prism2_update_comms_qual(local->dev);
2845}
2846
2847
2848/* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2849 * used to monitor that local->last_tick_timer is being updated. If not,
2850 * interrupt busy-loop is assumed and driver tries to recover by masking out
2851 * some events. */
2852static void hostap_tick_timer(struct timer_list *t)
2853{
2854 static unsigned long last_inquire = 0;
2855 local_info_t *local = from_timer(local, t, tick_timer);
2856 local->last_tick_timer = jiffies;
2857
2858 /* Inquire CommTallies every 10 seconds to keep the statistics updated
2859 * more often during low load and when using 32-bit tallies. */
2860 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2861 !local->hw_downloading && local->hw_ready &&
2862 !local->hw_resetting && local->dev_enabled) {
2863 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2864 HFA384X_INFO_COMMTALLIES, NULL, 0);
2865 last_inquire = jiffies;
2866 }
2867
2868 if ((local->last_comms_qual_update == 0 ||
2869 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2870 (local->iw_mode == IW_MODE_INFRA ||
2871 local->iw_mode == IW_MODE_ADHOC)) {
2872 schedule_work(&local->comms_qual_update);
2873 }
2874
2875 local->tick_timer.expires = jiffies + 2 * HZ;
2876 add_timer(&local->tick_timer);
2877}
2878
2879
2880#if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
2881static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
2882{
2883 return HFA384X_INW(reg);
2884}
2885
2886static int prism2_registers_proc_show(struct seq_file *m, void *v)
2887{
2888 local_info_t *local = m->private;
2889
2890#define SHOW_REG(n) \
2891 seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2892
2893 SHOW_REG(CMD);
2894 SHOW_REG(PARAM0);
2895 SHOW_REG(PARAM1);
2896 SHOW_REG(PARAM2);
2897 SHOW_REG(STATUS);
2898 SHOW_REG(RESP0);
2899 SHOW_REG(RESP1);
2900 SHOW_REG(RESP2);
2901 SHOW_REG(INFOFID);
2902 SHOW_REG(CONTROL);
2903 SHOW_REG(SELECT0);
2904 SHOW_REG(SELECT1);
2905 SHOW_REG(OFFSET0);
2906 SHOW_REG(OFFSET1);
2907 SHOW_REG(RXFID);
2908 SHOW_REG(ALLOCFID);
2909 SHOW_REG(TXCOMPLFID);
2910 SHOW_REG(SWSUPPORT0);
2911 SHOW_REG(SWSUPPORT1);
2912 SHOW_REG(SWSUPPORT2);
2913 SHOW_REG(EVSTAT);
2914 SHOW_REG(INTEN);
2915 SHOW_REG(EVACK);
2916 /* Do not read data registers, because they change the state of the
2917 * MAC (offset += 2) */
2918 /* SHOW_REG(DATA0); */
2919 /* SHOW_REG(DATA1); */
2920 SHOW_REG(AUXPAGE);
2921 SHOW_REG(AUXOFFSET);
2922 /* SHOW_REG(AUXDATA); */
2923#ifdef PRISM2_PCI
2924 SHOW_REG(PCICOR);
2925 SHOW_REG(PCIHCR);
2926 SHOW_REG(PCI_M0_ADDRH);
2927 SHOW_REG(PCI_M0_ADDRL);
2928 SHOW_REG(PCI_M0_LEN);
2929 SHOW_REG(PCI_M0_CTL);
2930 SHOW_REG(PCI_STATUS);
2931 SHOW_REG(PCI_M1_ADDRH);
2932 SHOW_REG(PCI_M1_ADDRL);
2933 SHOW_REG(PCI_M1_LEN);
2934 SHOW_REG(PCI_M1_CTL);
2935#endif /* PRISM2_PCI */
2936
2937 return 0;
2938}
2939#endif
2940
2941struct set_tim_data {
2942 struct list_head list;
2943 int aid;
2944 int set;
2945};
2946
2947static int prism2_set_tim(struct net_device *dev, int aid, int set)
2948{
2949 struct list_head *ptr;
2950 struct set_tim_data *new_entry;
2951 struct hostap_interface *iface;
2952 local_info_t *local;
2953
2954 iface = netdev_priv(dev);
2955 local = iface->local;
2956
2957 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2958 if (new_entry == NULL)
2959 return -ENOMEM;
2960
2961 new_entry->aid = aid;
2962 new_entry->set = set;
2963
2964 spin_lock_bh(&local->set_tim_lock);
2965 list_for_each(ptr, &local->set_tim_list) {
2966 struct set_tim_data *entry =
2967 list_entry(ptr, struct set_tim_data, list);
2968 if (entry->aid == aid) {
2969 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2970 "set=%d ==> %d\n",
2971 local->dev->name, aid, entry->set, set);
2972 entry->set = set;
2973 kfree(new_entry);
2974 new_entry = NULL;
2975 break;
2976 }
2977 }
2978 if (new_entry)
2979 list_add_tail(&new_entry->list, &local->set_tim_list);
2980 spin_unlock_bh(&local->set_tim_lock);
2981
2982 schedule_work(&local->set_tim_queue);
2983
2984 return 0;
2985}
2986
2987
2988static void handle_set_tim_queue(struct work_struct *work)
2989{
2990 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
2991 struct set_tim_data *entry;
2992 u16 val;
2993
2994 for (;;) {
2995 entry = NULL;
2996 spin_lock_bh(&local->set_tim_lock);
2997 if (!list_empty(&local->set_tim_list)) {
2998 entry = list_entry(local->set_tim_list.next,
2999 struct set_tim_data, list);
3000 list_del(&entry->list);
3001 }
3002 spin_unlock_bh(&local->set_tim_lock);
3003 if (!entry)
3004 break;
3005
3006 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3007 local->dev->name, entry->aid, entry->set);
3008
3009 val = entry->aid;
3010 if (entry->set)
3011 val |= 0x8000;
3012 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3013 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3014 "set=%d)\n",
3015 local->dev->name, entry->aid, entry->set);
3016 }
3017
3018 kfree(entry);
3019 }
3020}
3021
3022
3023static void prism2_clear_set_tim_queue(local_info_t *local)
3024{
3025 struct list_head *ptr, *n;
3026
3027 list_for_each_safe(ptr, n, &local->set_tim_list) {
3028 struct set_tim_data *entry;
3029 entry = list_entry(ptr, struct set_tim_data, list);
3030 list_del(&entry->list);
3031 kfree(entry);
3032 }
3033}
3034
3035
3036/*
3037 * HostAP uses two layers of net devices, where the inner
3038 * layer gets called all the time from the outer layer.
3039 * This is a natural nesting, which needs a split lock type.
3040 */
3041static struct lock_class_key hostap_netdev_xmit_lock_key;
3042static struct lock_class_key hostap_netdev_addr_lock_key;
3043
3044static void prism2_set_lockdep_class_one(struct net_device *dev,
3045 struct netdev_queue *txq,
3046 void *_unused)
3047{
3048 lockdep_set_class(&txq->_xmit_lock,
3049 &hostap_netdev_xmit_lock_key);
3050}
3051
3052static void prism2_set_lockdep_class(struct net_device *dev)
3053{
3054 lockdep_set_class(&dev->addr_list_lock,
3055 &hostap_netdev_addr_lock_key);
3056 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3057}
3058
3059static struct net_device *
3060prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3061 struct device *sdev)
3062{
3063 struct net_device *dev;
3064 struct hostap_interface *iface;
3065 struct local_info *local;
3066 int len, i, ret;
3067
3068 if (funcs == NULL)
3069 return NULL;
3070
3071 len = strlen(dev_template);
3072 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3073 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3074 dev_template);
3075 return NULL;
3076 }
3077
3078 len = sizeof(struct hostap_interface) +
3079 3 + sizeof(struct local_info) +
3080 3 + sizeof(struct ap_data);
3081
3082 dev = alloc_etherdev(len);
3083 if (dev == NULL)
3084 return NULL;
3085
3086 iface = netdev_priv(dev);
3087 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3088 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3089 local->dev = iface->dev = dev;
3090 iface->local = local;
3091 iface->type = HOSTAP_INTERFACE_MASTER;
3092 INIT_LIST_HEAD(&local->hostap_interfaces);
3093
3094 local->hw_module = THIS_MODULE;
3095
3096#ifdef PRISM2_IO_DEBUG
3097 local->io_debug_enabled = 1;
3098#endif /* PRISM2_IO_DEBUG */
3099
3100 local->func = funcs;
3101 local->func->cmd = hfa384x_cmd;
3102 local->func->read_regs = hfa384x_read_regs;
3103 local->func->get_rid = hfa384x_get_rid;
3104 local->func->set_rid = hfa384x_set_rid;
3105 local->func->hw_enable = prism2_hw_enable;
3106 local->func->hw_config = prism2_hw_config;
3107 local->func->hw_reset = prism2_hw_reset;
3108 local->func->hw_shutdown = prism2_hw_shutdown;
3109 local->func->reset_port = prism2_reset_port;
3110 local->func->schedule_reset = prism2_schedule_reset;
3111#ifdef PRISM2_DOWNLOAD_SUPPORT
3112 local->func->read_aux_proc_ops = &prism2_download_aux_dump_proc_ops;
3113 local->func->download = prism2_download;
3114#endif /* PRISM2_DOWNLOAD_SUPPORT */
3115 local->func->tx = prism2_tx_80211;
3116 local->func->set_tim = prism2_set_tim;
3117 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3118 * skb->data (FIX: maybe for DMA bus
3119 * mastering? */
3120
3121 local->mtu = mtu;
3122
3123 rwlock_init(&local->iface_lock);
3124 spin_lock_init(&local->txfidlock);
3125 spin_lock_init(&local->cmdlock);
3126 spin_lock_init(&local->baplock);
3127 spin_lock_init(&local->lock);
3128 spin_lock_init(&local->irq_init_lock);
3129 mutex_init(&local->rid_bap_mtx);
3130
3131 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3132 card_idx = 0;
3133 local->card_idx = card_idx;
3134
3135 len = strlen(essid);
3136 memcpy(local->essid, essid,
3137 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3138 local->essid[MAX_SSID_LEN] = '\0';
3139 i = GET_INT_PARM(iw_mode, card_idx);
3140 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3141 i == IW_MODE_MONITOR) {
3142 local->iw_mode = i;
3143 } else {
3144 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3145 "IW_MODE_MASTER\n", i);
3146 local->iw_mode = IW_MODE_MASTER;
3147 }
3148 local->channel = GET_INT_PARM(channel, card_idx);
3149 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3150 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3151 local->wds_max_connections = 16;
3152 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3153 local->manual_retry_count = -1;
3154 local->rts_threshold = 2347;
3155 local->fragm_threshold = 2346;
3156 local->rssi_to_dBm = 100; /* default; to be overriden by
3157 * cnfDbmAdjust, if available */
3158 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3159 local->sram_type = -1;
3160 local->scan_channel_mask = 0xffff;
3161 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3162
3163 /* Initialize task queue structures */
3164 INIT_WORK(&local->reset_queue, handle_reset_queue);
3165 INIT_WORK(&local->set_multicast_list_queue,
3166 hostap_set_multicast_list_queue);
3167
3168 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3169 INIT_LIST_HEAD(&local->set_tim_list);
3170 spin_lock_init(&local->set_tim_lock);
3171
3172 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3173
3174 /* Initialize tasklets for handling hardware IRQ related operations
3175 * outside hw IRQ handler */
3176 tasklet_setup(&local->bap_tasklet, hostap_bap_tasklet);
3177 tasklet_setup(&local->info_tasklet, hostap_info_tasklet);
3178 hostap_info_init(local);
3179
3180 tasklet_setup(&local->rx_tasklet, hostap_rx_tasklet);
3181 skb_queue_head_init(&local->rx_list);
3182
3183 tasklet_setup(&local->sta_tx_exc_tasklet,
3184 hostap_sta_tx_exc_tasklet);
3185 skb_queue_head_init(&local->sta_tx_exc_list);
3186
3187 INIT_LIST_HEAD(&local->cmd_queue);
3188 init_waitqueue_head(&local->hostscan_wq);
3189
3190 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3191
3192 timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3193 timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3194 local->tick_timer.expires = jiffies + 2 * HZ;
3195 add_timer(&local->tick_timer);
3196
3197 INIT_LIST_HEAD(&local->bss_list);
3198
3199 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3200
3201 dev->type = ARPHRD_IEEE80211;
3202 dev->header_ops = &hostap_80211_ops;
3203
3204 rtnl_lock();
3205 ret = dev_alloc_name(dev, "wifi%d");
3206 SET_NETDEV_DEV(dev, sdev);
3207 if (ret >= 0)
3208 ret = register_netdevice(dev);
3209
3210 prism2_set_lockdep_class(dev);
3211 rtnl_unlock();
3212 if (ret < 0) {
3213 printk(KERN_WARNING "%s: register netdevice failed!\n",
3214 dev_info);
3215 goto fail;
3216 }
3217 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3218
3219 hostap_init_data(local);
3220 return dev;
3221
3222 fail:
3223 free_netdev(dev);
3224 return NULL;
3225}
3226
3227
3228static int hostap_hw_ready(struct net_device *dev)
3229{
3230 struct hostap_interface *iface;
3231 struct local_info *local;
3232
3233 iface = netdev_priv(dev);
3234 local = iface->local;
3235 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3236 "", dev_template);
3237
3238 if (local->ddev) {
3239 if (local->iw_mode == IW_MODE_INFRA ||
3240 local->iw_mode == IW_MODE_ADHOC) {
3241 netif_carrier_off(local->dev);
3242 netif_carrier_off(local->ddev);
3243 }
3244 hostap_init_proc(local);
3245#ifndef PRISM2_NO_PROCFS_DEBUG
3246 proc_create_single_data("registers", 0, local->proc,
3247 prism2_registers_proc_show, local);
3248#endif /* PRISM2_NO_PROCFS_DEBUG */
3249 hostap_init_ap_proc(local);
3250 return 0;
3251 }
3252
3253 return -1;
3254}
3255
3256
3257static void prism2_free_local_data(struct net_device *dev)
3258{
3259 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3260 int i;
3261 struct hostap_interface *iface;
3262 struct local_info *local;
3263 struct list_head *ptr, *n;
3264
3265 if (dev == NULL)
3266 return;
3267
3268 iface = netdev_priv(dev);
3269 local = iface->local;
3270
3271 /* Unregister all netdevs before freeing local data. */
3272 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3273 iface = list_entry(ptr, struct hostap_interface, list);
3274 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3275 /* special handling for this interface below */
3276 continue;
3277 }
3278 hostap_remove_interface(iface->dev, 0, 1);
3279 }
3280
3281 unregister_netdev(local->dev);
3282
3283 flush_work(&local->reset_queue);
3284 flush_work(&local->set_multicast_list_queue);
3285 flush_work(&local->set_tim_queue);
3286#ifndef PRISM2_NO_STATION_MODES
3287 flush_work(&local->info_queue);
3288#endif
3289 flush_work(&local->comms_qual_update);
3290
3291 lib80211_crypt_info_free(&local->crypt_info);
3292
3293 if (timer_pending(&local->passive_scan_timer))
3294 del_timer(&local->passive_scan_timer);
3295
3296 if (timer_pending(&local->tick_timer))
3297 del_timer(&local->tick_timer);
3298
3299 prism2_clear_cmd_queue(local);
3300
3301 skb_queue_purge(&local->info_list);
3302 skb_queue_purge(&local->rx_list);
3303 skb_queue_purge(&local->sta_tx_exc_list);
3304
3305 if (local->dev_enabled)
3306 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3307
3308 if (local->ap != NULL)
3309 hostap_free_data(local->ap);
3310
3311#ifndef PRISM2_NO_PROCFS_DEBUG
3312 if (local->proc != NULL)
3313 remove_proc_entry("registers", local->proc);
3314#endif /* PRISM2_NO_PROCFS_DEBUG */
3315 hostap_remove_proc(local);
3316
3317 tx_cb = local->tx_callback;
3318 while (tx_cb != NULL) {
3319 tx_cb_prev = tx_cb;
3320 tx_cb = tx_cb->next;
3321 kfree(tx_cb_prev);
3322 }
3323
3324 hostap_set_hostapd(local, 0, 0);
3325 hostap_set_hostapd_sta(local, 0, 0);
3326
3327 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3328 if (local->frag_cache[i].skb != NULL)
3329 dev_kfree_skb(local->frag_cache[i].skb);
3330 }
3331
3332#ifdef PRISM2_DOWNLOAD_SUPPORT
3333 prism2_download_free_data(local->dl_pri);
3334 prism2_download_free_data(local->dl_sec);
3335#endif /* PRISM2_DOWNLOAD_SUPPORT */
3336
3337 prism2_clear_set_tim_queue(local);
3338
3339 list_for_each_safe(ptr, n, &local->bss_list) {
3340 struct hostap_bss_info *bss =
3341 list_entry(ptr, struct hostap_bss_info, list);
3342 kfree(bss);
3343 }
3344
3345 kfree(local->pda);
3346 kfree(local->last_scan_results);
3347 kfree(local->generic_elem);
3348
3349 free_netdev(local->dev);
3350}
3351
3352
3353#if defined(PRISM2_PCI) || defined(PRISM2_PCCARD)
3354static void __maybe_unused prism2_suspend(struct net_device *dev)
3355{
3356 struct hostap_interface *iface;
3357 struct local_info *local;
3358 union iwreq_data wrqu;
3359
3360 iface = netdev_priv(dev);
3361 local = iface->local;
3362
3363 /* Send disconnect event, e.g., to trigger reassociation after resume
3364 * if wpa_supplicant is used. */
3365 memset(&wrqu, 0, sizeof(wrqu));
3366 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3367 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3368
3369 /* Disable hardware and firmware */
3370 prism2_hw_shutdown(dev, 0);
3371}
3372#endif /* PRISM2_PCI || PRISM2_PCCARD */
3373
3374
3375/* These might at some point be compiled separately and used as separate
3376 * kernel modules or linked into one */
3377#ifdef PRISM2_DOWNLOAD_SUPPORT
3378#include "hostap_download.c"
3379#endif /* PRISM2_DOWNLOAD_SUPPORT */
3380
3381#ifdef PRISM2_CALLBACK
3382/* External hostap_callback.c file can be used to, e.g., blink activity led.
3383 * This can use platform specific code and must define prism2_callback()
3384 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3385 * used. */
3386#include "hostap_callback.c"
3387#endif /* PRISM2_CALLBACK */