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Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuil...
[net-next-2.6.git] / drivers / net / wireless / hostap / hostap_hw.c
CommitLineData
ff1d2767
JM		 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
85d32e7b
JM		 6 * <j@w1.fi>
7 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
ff1d2767
JM		 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
ff1d2767
JM		 33
34#include <asm/delay.h>
35#include <asm/uaccess.h>
36
37#include <linux/slab.h>
38#include <linux/netdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/proc_fs.h>
41#include <linux/if_arp.h>
42#include <linux/delay.h>
43#include <linux/random.h>
44#include <linux/wait.h>
45#include <linux/sched.h>
46#include <linux/rtnetlink.h>
47#include <linux/wireless.h>
48#include <net/iw_handler.h>
274bfb8d 49#include <net/lib80211.h>
ff1d2767
JM		 50#include <asm/irq.h>
51
ff1d2767
JM		 52#include "hostap_80211.h"
53#include "hostap.h"
54#include "hostap_ap.h"
55
56
57/* #define final_version */
58
59static int mtu = 1500;
60module_param(mtu, int, 0444);
61MODULE_PARM_DESC(mtu, "Maximum transfer unit");
62
63static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
64module_param_array(channel, int, NULL, 0444);
65MODULE_PARM_DESC(channel, "Initial channel");
66
67static char essid[33] = "test";
68module_param_string(essid, essid, sizeof(essid), 0444);
69MODULE_PARM_DESC(essid, "Host AP's ESSID");
70
71static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
72module_param_array(iw_mode, int, NULL, 0444);
73MODULE_PARM_DESC(iw_mode, "Initial operation mode");
74
75static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
76module_param_array(beacon_int, int, NULL, 0444);
77MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
78
79static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
80module_param_array(dtim_period, int, NULL, 0444);
81MODULE_PARM_DESC(dtim_period, "DTIM period");
82
ff1d2767
JM		 83static char dev_template[16] = "wlan%d";
84module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
85MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
86 "wlan%d)");
87
88#ifdef final_version
89#define EXTRA_EVENTS_WTERR 0
90#else
91/* check WTERR events (Wait Time-out) in development versions */
92#define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
93#endif
94
ff1d2767
JM		 95/* Events that will be using BAP0 */
96#define HFA384X_BAP0_EVENTS \
97 (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
98
99/* event mask, i.e., events that will result in an interrupt */
100#define HFA384X_EVENT_MASK \
101 (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
102 HFA384X_EV_CMD | HFA384X_EV_TICK | \
ea3f1865 103 EXTRA_EVENTS_WTERR)
ff1d2767
JM		 104
105/* Default TX control flags: use 802.11 headers and request interrupt for
106 * failed transmits. Frames that request ACK callback, will add
107 * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
108 */
109#define HFA384X_TX_CTRL_FLAGS \
110 (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
111
112
113/* ca. 1 usec */
114#define HFA384X_CMD_BUSY_TIMEOUT 5000
115#define HFA384X_BAP_BUSY_TIMEOUT 50000
116
117/* ca. 10 usec */
118#define HFA384X_CMD_COMPL_TIMEOUT 20000
119#define HFA384X_DL_COMPL_TIMEOUT 1000000
120
121/* Wait times for initialization; yield to other processes to avoid busy
122 * waiting for long time. */
123#define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
124#define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
125
126
127static void prism2_hw_reset(struct net_device *dev);
128static void prism2_check_sta_fw_version(local_info_t *local);
129
130#ifdef PRISM2_DOWNLOAD_SUPPORT
131/* hostap_download.c */
132static int prism2_download_aux_dump(struct net_device *dev,
133 unsigned int addr, int len, u8 *buf);
134static u8 * prism2_read_pda(struct net_device *dev);
135static int prism2_download(local_info_t *local,
136 struct prism2_download_param *param);
137static void prism2_download_free_data(struct prism2_download_data *dl);
138static int prism2_download_volatile(local_info_t *local,
139 struct prism2_download_data *param);
140static int prism2_download_genesis(local_info_t *local,
141 struct prism2_download_data *param);
142static int prism2_get_ram_size(local_info_t *local);
143#endif /* PRISM2_DOWNLOAD_SUPPORT */
144
145
146
147
148#ifndef final_version
149/* magic value written to SWSUPPORT0 reg. for detecting whether card is still
150 * present */
151#define HFA384X_MAGIC 0x8A32
152#endif
153
154
155static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
156{
157 return HFA384X_INW(reg);
158}
159
160
161static void hfa384x_read_regs(struct net_device *dev,
162 struct hfa384x_regs *regs)
163{
164 regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
165 regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
166 regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
167 regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
168 regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
169}
170
171
172/**
173 * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
174 * @local: pointer to private Host AP driver data
175 * @entry: Prism2 command queue entry to be freed
176 * @del_req: request the entry to be removed
177 *
178 * Internal helper function for freeing Prism2 command queue entries.
179 * Caller must have acquired local->cmdlock before calling this function.
180 */
181static inline void __hostap_cmd_queue_free(local_info_t *local,
182 struct hostap_cmd_queue *entry,
183 int del_req)
184{
185 if (del_req) {
186 entry->del_req = 1;
187 if (!list_empty(&entry->list)) {
188 list_del_init(&entry->list);
189 local->cmd_queue_len--;
190 }
191 }
192
193 if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
194 kfree(entry);
195}
196
197
198/**
199 * hostap_cmd_queue_free - Free Prism2 command queue entry
200 * @local: pointer to private Host AP driver data
201 * @entry: Prism2 command queue entry to be freed
202 * @del_req: request the entry to be removed
203 *
204 * Free a Prism2 command queue entry.
205 */
206static inline void hostap_cmd_queue_free(local_info_t *local,
207 struct hostap_cmd_queue *entry,
208 int del_req)
209{
210 unsigned long flags;
211
212 spin_lock_irqsave(&local->cmdlock, flags);
213 __hostap_cmd_queue_free(local, entry, del_req);
214 spin_unlock_irqrestore(&local->cmdlock, flags);
215}
216
217
218/**
219 * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
220 * @local: pointer to private Host AP driver data
221 */
222static void prism2_clear_cmd_queue(local_info_t *local)
223{
224 struct list_head *ptr, *n;
225 unsigned long flags;
226 struct hostap_cmd_queue *entry;
227
228 spin_lock_irqsave(&local->cmdlock, flags);
229 list_for_each_safe(ptr, n, &local->cmd_queue) {
230 entry = list_entry(ptr, struct hostap_cmd_queue, list);
231 atomic_inc(&entry->usecnt);
232 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
233 "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
234 local->dev->name, entry->type, entry->cmd,
235 entry->param0);
236 __hostap_cmd_queue_free(local, entry, 1);
237 }
238 if (local->cmd_queue_len) {
239 /* This should not happen; print debug message and clear
240 * queue length. */
241 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
242 "flush\n", local->dev->name, local->cmd_queue_len);
243 local->cmd_queue_len = 0;
244 }
245 spin_unlock_irqrestore(&local->cmdlock, flags);
246}
247
248
249/**
250 * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
251 * @dev: pointer to net_device
252 * @entry: Prism2 command queue entry to be issued
253 */
858119e1 254static int hfa384x_cmd_issue(struct net_device *dev,
ff1d2767
JM		 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
b0471bb7 349 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
ff1d2767
JM		 350 if (entry == NULL) {
351 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
352 dev->name);
353 return -ENOMEM;
354 }
ff1d2767
JM		 355 atomic_set(&entry->usecnt, 1);
356 entry->type = CMD_SLEEP;
357 entry->cmd = cmd;
358 entry->param0 = param0;
359 if (param1)
360 entry->param1 = *param1;
361 init_waitqueue_head(&entry->compl);
362
363 /* prepare to wait for command completion event, but do not sleep yet
364 */
365 add_wait_queue(&entry->compl, &wait);
366 set_current_state(TASK_INTERRUPTIBLE);
367
368 spin_lock_irqsave(&local->cmdlock, flags);
369 issue = list_empty(&local->cmd_queue);
370 if (issue)
371 entry->issuing = 1;
372 list_add_tail(&entry->list, &local->cmd_queue);
373 local->cmd_queue_len++;
374 spin_unlock_irqrestore(&local->cmdlock, flags);
375
376 err = 0;
377 if (!issue)
378 goto wait_completion;
379
380 if (signal_pending(current))
381 err = -EINTR;
382
383 if (!err) {
384 if (hfa384x_cmd_issue(dev, entry))
385 err = -ETIMEDOUT;
386 else
387 issued = 1;
388 }
389
390 wait_completion:
391 if (!err && entry->type != CMD_COMPLETED) {
392 /* sleep until command is completed or timed out */
393 res = schedule_timeout(2 * HZ);
394 } else
395 res = -1;
396
397 if (!err && signal_pending(current))
398 err = -EINTR;
399
400 if (err && issued) {
401 /* the command was issued, so a CmdCompl event should occur
402 * soon; however, there's a pending signal and
403 * schedule_timeout() would be interrupted; wait a short period
404 * of time to avoid removing entry from the list before
405 * CmdCompl event */
406 udelay(300);
407 }
408
409 set_current_state(TASK_RUNNING);
410 remove_wait_queue(&entry->compl, &wait);
411
412 /* If entry->list is still in the list, it must be removed
413 * first and in this case prism2_cmd_ev() does not yet have
414 * local reference to it, and the data can be kfree()'d
415 * here. If the command completion event is still generated,
416 * it will be assigned to next (possibly) pending command, but
417 * the driver will reset the card anyway due to timeout
418 *
419 * If the entry is not in the list prism2_cmd_ev() has a local
420 * reference to it, but keeps cmdlock as long as the data is
421 * needed, so the data can be kfree()'d here. */
422
423 /* FIX: if the entry->list is in the list, it has not been completed
424 * yet, so removing it here is somewhat wrong.. this could cause
425 * references to freed memory and next list_del() causing NULL pointer
426 * dereference.. it would probably be better to leave the entry in the
427 * list and the list should be emptied during hw reset */
428
429 spin_lock_irqsave(&local->cmdlock, flags);
430 if (!list_empty(&entry->list)) {
431 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
432 "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
433 entry->type, res);
434 list_del_init(&entry->list);
435 local->cmd_queue_len--;
436 }
437 spin_unlock_irqrestore(&local->cmdlock, flags);
438
439 if (err) {
440 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
441 dev->name, err);
442 res = err;
443 goto done;
444 }
445
446 if (entry->type != CMD_COMPLETED) {
447 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
448 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
449 "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
450 "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
451 res, entry, entry->type, entry->cmd, entry->param0, reg,
452 HFA384X_INW(HFA384X_INTEN_OFF));
453 if (reg & HFA384X_EV_CMD) {
454 /* Command completion event is pending, but the
455 * interrupt was not delivered - probably an issue
456 * with pcmcia-cs configuration. */
457 printk(KERN_WARNING "%s: interrupt delivery does not "
458 "seem to work\n", dev->name);
459 }
460 prism2_io_debug_error(dev, 3);
461 res = -ETIMEDOUT;
462 goto done;
463 }
464
465 if (resp0 != NULL)
466 *resp0 = entry->resp0;
467#ifndef final_version
468 if (entry->res) {
469 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
470 "resp0=0x%04x\n",
471 dev->name, cmd, entry->res, entry->resp0);
472 }
473#endif /* final_version */
474
475 res = entry->res;
476 done:
477 hostap_cmd_queue_free(local, entry, 1);
478 return res;
479}
480
481
482/**
483 * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
484 * @dev: pointer to net_device
485 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
486 * @param0: value for Param0 register
487 * @callback: command completion callback function (%NULL = no callback)
b15eff26 488 * @context: context data to be given to the callback function
ff1d2767
JM		 489 *
490 * Issue given command (possibly after waiting in command queue) and use
491 * callback function to indicate command completion. This can be called both
492 * from user and interrupt context. The callback function will be called in
493 * hardware IRQ context. It can be %NULL, when no function is called when
494 * command is completed.
495 */
496static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
497 void (*callback)(struct net_device *dev,
b15eff26 498 long context, u16 resp0,
ff1d2767 499 u16 status),
b15eff26 500 long context)
ff1d2767
JM		 501{
502 struct hostap_interface *iface;
503 local_info_t *local;
504 int issue, ret;
505 unsigned long flags;
506 struct hostap_cmd_queue *entry;
507
508 iface = netdev_priv(dev);
509 local = iface->local;
510
511 if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
512 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
513 dev->name);
514 return -1;
515 }
516
b0471bb7 517 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
ff1d2767
JM		 518 if (entry == NULL) {
519 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
520 "failed\n", dev->name);
521 return -ENOMEM;
522 }
ff1d2767
JM		 523 atomic_set(&entry->usecnt, 1);
524 entry->type = CMD_CALLBACK;
525 entry->cmd = cmd;
526 entry->param0 = param0;
527 entry->callback = callback;
528 entry->context = context;
529
530 spin_lock_irqsave(&local->cmdlock, flags);
531 issue = list_empty(&local->cmd_queue);
532 if (issue)
533 entry->issuing = 1;
534 list_add_tail(&entry->list, &local->cmd_queue);
535 local->cmd_queue_len++;
536 spin_unlock_irqrestore(&local->cmdlock, flags);
537
538 if (issue && hfa384x_cmd_issue(dev, entry))
539 ret = -ETIMEDOUT;
540 else
541 ret = 0;
542
543 hostap_cmd_queue_free(local, entry, ret);
544
545 return ret;
546}
547
548
549/**
550 * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
551 * @dev: pointer to net_device
552 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
553 * @param0: value for Param0 register
554 * @io_debug_num: I/O debug error number
555 *
556 * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
557 */
558static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
559 int io_debug_num)
560{
561 int tries;
562 u16 reg;
563
564 /* wait until busy bit is clear; this should always be clear since the
565 * commands are serialized */
566 tries = HFA384X_CMD_BUSY_TIMEOUT;
567 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
568 tries--;
569 udelay(1);
570 }
571 if (tries == 0) {
572 reg = HFA384X_INW(HFA384X_CMD_OFF);
573 prism2_io_debug_error(dev, io_debug_num);
574 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
575 "reg=0x%04x\n", dev->name, io_debug_num, reg);
576 return -ETIMEDOUT;
577 }
578
579 /* write command */
580 HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
581 HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
582
583 return 0;
584}
585
586
587/**
588 * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
589 * @dev: pointer to net_device
590 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
591 * @param0: value for Param0 register
592 */
593static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
594{
595 int res, tries;
596 u16 reg;
597
598 res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
599 if (res)
600 return res;
601
602 /* wait for command completion */
603 if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
604 tries = HFA384X_DL_COMPL_TIMEOUT;
605 else
606 tries = HFA384X_CMD_COMPL_TIMEOUT;
607
608 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
609 tries > 0) {
610 tries--;
611 udelay(10);
612 }
613 if (tries == 0) {
614 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
615 prism2_io_debug_error(dev, 5);
616 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
617 "reg=0x%04x\n", dev->name, reg);
618 return -ETIMEDOUT;
619 }
620
621 res = (HFA384X_INW(HFA384X_STATUS_OFF) &
622 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
623 BIT(8))) >> 8;
624#ifndef final_version
625 if (res) {
626 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
627 dev->name, cmd, res);
628 }
629#endif
630
631 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
632
633 return res;
634}
635
636
637/**
638 * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
639 * @dev: pointer to net_device
640 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
641 * @param0: value for Param0 register
642 */
643static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
644 u16 param0)
645{
646 return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
647}
648
649
650/**
651 * prism2_cmd_ev - Prism2 command completion event handler
652 * @dev: pointer to net_device
653 *
654 * Interrupt handler for command completion events. Called by the main
655 * interrupt handler in hardware IRQ context. Read Resp0 and status registers
656 * from the hardware and ACK the event. Depending on the issued command type
657 * either wake up the sleeping process that is waiting for command completion
658 * or call the callback function. Issue the next command, if one is pending.
659 */
660static void prism2_cmd_ev(struct net_device *dev)
661{
662 struct hostap_interface *iface;
663 local_info_t *local;
664 struct hostap_cmd_queue *entry = NULL;
665
666 iface = netdev_priv(dev);
667 local = iface->local;
668
669 spin_lock(&local->cmdlock);
670 if (!list_empty(&local->cmd_queue)) {
671 entry = list_entry(local->cmd_queue.next,
672 struct hostap_cmd_queue, list);
673 atomic_inc(&entry->usecnt);
674 list_del_init(&entry->list);
675 local->cmd_queue_len--;
676
677 if (!entry->issued) {
678 printk(KERN_DEBUG "%s: Command completion event, but "
679 "cmd not issued\n", dev->name);
680 __hostap_cmd_queue_free(local, entry, 1);
681 entry = NULL;
682 }
683 }
684 spin_unlock(&local->cmdlock);
685
686 if (!entry) {
687 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
688 printk(KERN_DEBUG "%s: Command completion event, but no "
689 "pending commands\n", dev->name);
690 return;
691 }
692
693 entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
694 entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
695 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
696 BIT(9) | BIT(8))) >> 8;
697 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
698
699 /* TODO: rest of the CmdEv handling could be moved to tasklet */
700 if (entry->type == CMD_SLEEP) {
701 entry->type = CMD_COMPLETED;
702 wake_up_interruptible(&entry->compl);
703 } else if (entry->type == CMD_CALLBACK) {
704 if (entry->callback)
705 entry->callback(dev, entry->context, entry->resp0,
706 entry->res);
707 } else {
708 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
709 dev->name, entry->type);
710 }
711 hostap_cmd_queue_free(local, entry, 1);
712
713 /* issue next command, if pending */
714 entry = NULL;
715 spin_lock(&local->cmdlock);
716 if (!list_empty(&local->cmd_queue)) {
717 entry = list_entry(local->cmd_queue.next,
718 struct hostap_cmd_queue, list);
719 if (entry->issuing) {
720 /* hfa384x_cmd() has already started issuing this
721 * command, so do not start here */
722 entry = NULL;
723 }
724 if (entry)
725 atomic_inc(&entry->usecnt);
726 }
727 spin_unlock(&local->cmdlock);
728
729 if (entry) {
730 /* issue next command; if command issuing fails, remove the
731 * entry from cmd_queue */
732 int res = hfa384x_cmd_issue(dev, entry);
733 spin_lock(&local->cmdlock);
734 __hostap_cmd_queue_free(local, entry, res);
735 spin_unlock(&local->cmdlock);
736 }
737}
738
739
858119e1 740static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
ff1d2767
JM		 741{
742 int tries = HFA384X_BAP_BUSY_TIMEOUT;
743 int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
744
745 while (res && tries > 0) {
746 tries--;
747 udelay(1);
748 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
749 }
750 return res;
751}
752
753
754/* Offset must be even */
755static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
756 int offset)
757{
758 u16 o_off, s_off;
759 int ret = 0;
760
761 if (offset % 2 || bap > 1)
762 return -EINVAL;
763
764 if (bap == BAP1) {
765 o_off = HFA384X_OFFSET1_OFF;
766 s_off = HFA384X_SELECT1_OFF;
767 } else {
768 o_off = HFA384X_OFFSET0_OFF;
769 s_off = HFA384X_SELECT0_OFF;
770 }
771
772 if (hfa384x_wait_offset(dev, o_off)) {
773 prism2_io_debug_error(dev, 7);
774 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
775 dev->name);
776 ret = -ETIMEDOUT;
777 goto out;
778 }
779
780 HFA384X_OUTW(id, s_off);
781 HFA384X_OUTW(offset, o_off);
782
783 if (hfa384x_wait_offset(dev, o_off)) {
784 prism2_io_debug_error(dev, 8);
785 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
786 dev->name);
787 ret = -ETIMEDOUT;
788 goto out;
789 }
790#ifndef final_version
791 if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
792 prism2_io_debug_error(dev, 9);
793 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
794 "(%d,0x04%x,%d); reg=0x%04x\n",
795 dev->name, bap, id, offset, HFA384X_INW(o_off));
796 ret = -EINVAL;
797 }
798#endif
799
800 out:
801 return ret;
802}
803
804
805static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
806 int exact_len)
807{
808 struct hostap_interface *iface;
809 local_info_t *local;
810 int res, rlen = 0;
811 struct hfa384x_rid_hdr rec;
812
813 iface = netdev_priv(dev);
814 local = iface->local;
815
816 if (local->no_pri) {
817 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
818 "f/w\n", dev->name, rid, len);
819 return -ENOTTY; /* Well.. not really correct, but return
820 * something unique enough.. */
821 }
822
823 if ((local->func->card_present && !local->func->card_present(local)) ||
824 local->hw_downloading)
825 return -ENODEV;
826
3623060a 827 res = mutex_lock_interruptible(&local->rid_bap_mtx);
ff1d2767
JM		 828 if (res)
829 return res;
830
831 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
832 if (res) {
833 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
834 "(res=%d, rid=%04x, len=%d)\n",
835 dev->name, res, rid, len);
3623060a 836 mutex_unlock(&local->rid_bap_mtx);
ff1d2767
JM		 837 return res;
838 }
839
840 spin_lock_bh(&local->baplock);
841
842 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
843 if (!res)
844 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
845
846 if (le16_to_cpu(rec.len) == 0) {
847 /* RID not available */
848 res = -ENODATA;
849 }
850
851 rlen = (le16_to_cpu(rec.len) - 1) * 2;
852 if (!res && exact_len && rlen != len) {
853 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
854 "rid=0x%04x, len=%d (expected %d)\n",
855 dev->name, rid, rlen, len);
856 res = -ENODATA;
857 }
858
859 if (!res)
860 res = hfa384x_from_bap(dev, BAP0, buf, len);
861
862 spin_unlock_bh(&local->baplock);
3623060a 863 mutex_unlock(&local->rid_bap_mtx);
ff1d2767
JM		 864
865 if (res) {
866 if (res != -ENODATA)
867 printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
868 "len=%d) - failed - res=%d\n", dev->name, rid,
869 len, res);
870 if (res == -ETIMEDOUT)
871 prism2_hw_reset(dev);
872 return res;
873 }
874
875 return rlen;
876}
877
878
879static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
880{
881 struct hostap_interface *iface;
882 local_info_t *local;
883 struct hfa384x_rid_hdr rec;
884 int res;
885
886 iface = netdev_priv(dev);
887 local = iface->local;
888
889 if (local->no_pri) {
890 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
891 "f/w\n", dev->name, rid, len);
892 return -ENOTTY; /* Well.. not really correct, but return
893 * something unique enough.. */
894 }
895
896 if ((local->func->card_present && !local->func->card_present(local)) ||
897 local->hw_downloading)
898 return -ENODEV;
899
900 rec.rid = cpu_to_le16(rid);
901 /* RID len in words and +1 for rec.rid */
902 rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
903
3623060a 904 res = mutex_lock_interruptible(&local->rid_bap_mtx);
ff1d2767
JM		 905 if (res)
906 return res;
907
908 spin_lock_bh(&local->baplock);
909 res = hfa384x_setup_bap(dev, BAP0, rid, 0);
910 if (!res)
911 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
912 if (!res)
913 res = hfa384x_to_bap(dev, BAP0, buf, len);
914 spin_unlock_bh(&local->baplock);
915
916 if (res) {
917 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
918 "failed - res=%d\n", dev->name, rid, len, res);
3623060a 919 mutex_unlock(&local->rid_bap_mtx);
ff1d2767
JM		 920 return res;
921 }
922
923 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
3623060a 924 mutex_unlock(&local->rid_bap_mtx);
971d1e69 925
ff1d2767
JM		 926 if (res) {
927 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
928 "failed (res=%d, rid=%04x, len=%d)\n",
929 dev->name, res, rid, len);
ff1d2767 930
971d1e69
AB		 931 if (res == -ETIMEDOUT)
932 prism2_hw_reset(dev);
933 }
ff1d2767
JM		 934
935 return res;
936}
937
938
939static void hfa384x_disable_interrupts(struct net_device *dev)
940{
941 /* disable interrupts and clear event status */
942 HFA384X_OUTW(0, HFA384X_INTEN_OFF);
943 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
944}
945
946
947static void hfa384x_enable_interrupts(struct net_device *dev)
948{
949 /* ack pending events and enable interrupts from selected events */
950 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
951 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
952}
953
954
955static void hfa384x_events_no_bap0(struct net_device *dev)
956{
957 HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
958 HFA384X_INTEN_OFF);
959}
960
961
962static void hfa384x_events_all(struct net_device *dev)
963{
964 HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
965}
966
967
968static void hfa384x_events_only_cmd(struct net_device *dev)
969{
970 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
971}
972
973
974static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
975{
976 u16 fid;
977 unsigned long delay;
978
979 /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
980 * below would be handled like CmdCompl event (sleep here, wake up from
981 * interrupt handler */
982 if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
983 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
984 dev->name, len);
985 return 0xffff;
986 }
987
988 delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
989 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
990 time_before(jiffies, delay))
991 yield();
992 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
993 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
994 return 0xffff;
995 }
996
997 fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
998 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
999
1000 return fid;
1001}
1002
1003
1004static int prism2_reset_port(struct net_device *dev)
1005{
1006 struct hostap_interface *iface;
1007 local_info_t *local;
1008 int res;
1009
1010 iface = netdev_priv(dev);
1011 local = iface->local;
1012
1013 if (!local->dev_enabled)
1014 return 0;
1015
1016 res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1017 NULL, NULL);
1018 if (res)
1019 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1020 dev->name);
1021 else {
1022 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1023 NULL, NULL);
1024 if (res)
1025 printk(KERN_DEBUG "%s: reset port failed to enable "
1026 "port\n", dev->name);
1027 }
1028
1029 /* It looks like at least some STA firmware versions reset
1030 * fragmentation threshold back to 2346 after enable command. Restore
1031 * the configured value, if it differs from this default. */
1032 if (local->fragm_threshold != 2346 &&
1033 hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1034 local->fragm_threshold)) {
1035 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1036 "threshold (%d) after Port0 enable\n",
1037 dev->name, local->fragm_threshold);
1038 }
1039
9b5cce07
PR		 1040 /* Some firmwares lose antenna selection settings on reset */
1041 (void) hostap_set_antsel(local);
1042
ff1d2767
JM		 1043 return res;
1044}
1045
1046
1047static int prism2_get_version_info(struct net_device *dev, u16 rid,
1048 const char *txt)
1049{
1050 struct hfa384x_comp_ident comp;
1051 struct hostap_interface *iface;
1052 local_info_t *local;
1053
1054 iface = netdev_priv(dev);
1055 local = iface->local;
1056
1057 if (local->no_pri) {
1058 /* PRI f/w not yet available - cannot read RIDs */
1059 return -1;
1060 }
1061 if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1062 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1063 return -1;
1064 }
1065
1066 printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1067 __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1068 __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1069 return 0;
1070}
1071
1072
1073static int prism2_setup_rids(struct net_device *dev)
1074{
1075 struct hostap_interface *iface;
1076 local_info_t *local;
8a9faf3c 1077 __le16 tmp;
ff1d2767
JM		 1078 int ret = 0;
1079
1080 iface = netdev_priv(dev);
1081 local = iface->local;
1082
1083 hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1084
1085 if (!local->fw_ap) {
8a9faf3c
AV		 1086 u16 tmp1 = hostap_get_porttype(local);
1087 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
ff1d2767
JM		 1088 if (ret) {
1089 printk("%s: Port type setting to %d failed\n",
8a9faf3c 1090 dev->name, tmp1);
ff1d2767
JM		 1091 goto fail;
1092 }
1093 }
1094
1095 /* Setting SSID to empty string seems to kill the card in Host AP mode
1096 */
1097 if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1098 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1099 local->essid);
1100 if (ret) {
1101 printk("%s: AP own SSID setting failed\n", dev->name);
1102 goto fail;
1103 }
1104 }
1105
1106 ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1107 PRISM2_DATA_MAXLEN);
1108 if (ret) {
1109 printk("%s: MAC data length setting to %d failed\n",
1110 dev->name, PRISM2_DATA_MAXLEN);
1111 goto fail;
1112 }
1113
1114 if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1115 printk("%s: Channel list read failed\n", dev->name);
1116 ret = -EINVAL;
1117 goto fail;
1118 }
8a9faf3c 1119 local->channel_mask = le16_to_cpu(tmp);
ff1d2767
JM		 1120
1121 if (local->channel < 1 || local->channel > 14 ||
1122 !(local->channel_mask & (1 << (local->channel - 1)))) {
1123 printk(KERN_WARNING "%s: Channel setting out of range "
1124 "(%d)!\n", dev->name, local->channel);
1125 ret = -EBUSY;
1126 goto fail;
1127 }
1128
1129 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1130 if (ret) {
1131 printk("%s: Channel setting to %d failed\n",
1132 dev->name, local->channel);
1133 goto fail;
1134 }
1135
1136 ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1137 local->beacon_int);
1138 if (ret) {
1139 printk("%s: Beacon interval setting to %d failed\n",
1140 dev->name, local->beacon_int);
1141 /* this may fail with Symbol/Lucent firmware */
1142 if (ret == -ETIMEDOUT)
1143 goto fail;
1144 }
1145
1146 ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1147 local->dtim_period);
1148 if (ret) {
1149 printk("%s: DTIM period setting to %d failed\n",
1150 dev->name, local->dtim_period);
1151 /* this may fail with Symbol/Lucent firmware */
1152 if (ret == -ETIMEDOUT)
1153 goto fail;
1154 }
1155
1156 ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1157 local->is_promisc);
1158 if (ret)
1159 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1160 dev->name, local->is_promisc);
1161
1162 if (!local->fw_ap) {
1163 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1164 local->essid);
1165 if (ret) {
1166 printk("%s: Desired SSID setting failed\n", dev->name);
1167 goto fail;
1168 }
1169 }
1170
1171 /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1172 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1173 * rates */
1174 if (local->tx_rate_control == 0) {
1175 local->tx_rate_control =
1176 HFA384X_RATES_1MBPS |
1177 HFA384X_RATES_2MBPS |
1178 HFA384X_RATES_5MBPS |
1179 HFA384X_RATES_11MBPS;
1180 }
1181 if (local->basic_rates == 0)
1182 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1183
1184 if (!local->fw_ap) {
1185 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1186 local->tx_rate_control);
1187 if (ret) {
1188 printk("%s: TXRateControl setting to %d failed\n",
1189 dev->name, local->tx_rate_control);
1190 goto fail;
1191 }
1192
1193 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1194 local->tx_rate_control);
1195 if (ret) {
1196 printk("%s: cnfSupportedRates setting to %d failed\n",
1197 dev->name, local->tx_rate_control);
1198 }
1199
1200 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1201 local->basic_rates);
1202 if (ret) {
1203 printk("%s: cnfBasicRates setting to %d failed\n",
1204 dev->name, local->basic_rates);
1205 }
1206
1207 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1208 if (ret) {
1209 printk("%s: Create IBSS setting to 1 failed\n",
1210 dev->name);
1211 }
1212 }
1213
1214 if (local->name_set)
1215 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1216 local->name);
1217
1218 if (hostap_set_encryption(local)) {
1219 printk(KERN_INFO "%s: could not configure encryption\n",
1220 dev->name);
1221 }
1222
1223 (void) hostap_set_antsel(local);
1224
1225 if (hostap_set_roaming(local)) {
1226 printk(KERN_INFO "%s: could not set host roaming\n",
1227 dev->name);
1228 }
1229
1230 if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1231 hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1232 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1233 dev->name, local->enh_sec);
1234
1235 /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1236 * not working correctly (last seven counters report bogus values).
1237 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1238 * beginning with that firmware version. Another bug fix for 32-bit
1239 * tallies in 1.4.0; should 16-bit tallies be used for some other
1240 * versions, too? */
1241 if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1242 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1243 printk(KERN_INFO "%s: cnfThirty2Tally setting "
1244 "failed\n", dev->name);
1245 local->tallies32 = 0;
1246 } else
1247 local->tallies32 = 1;
1248 } else
1249 local->tallies32 = 0;
1250
1251 hostap_set_auth_algs(local);
1252
1253 if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1254 local->fragm_threshold)) {
1255 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1256 "failed\n", dev->name, local->fragm_threshold);
1257 }
1258
1259 if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1260 local->rts_threshold)) {
1261 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1262 dev->name, local->rts_threshold);
1263 }
1264
1265 if (local->manual_retry_count >= 0 &&
1266 hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1267 local->manual_retry_count)) {
1268 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1269 dev->name, local->manual_retry_count);
1270 }
1271
1272 if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1273 hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1274 local->rssi_to_dBm = le16_to_cpu(tmp);
1275 }
1276
1277 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1278 hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1279 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1280 dev->name);
1281 }
1282
1283 if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1284 hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1285 local->generic_elem, local->generic_elem_len)) {
1286 printk(KERN_INFO "%s: setting genericElement failed\n",
1287 dev->name);
1288 }
1289
1290 fail:
1291 return ret;
1292}
1293
1294
1295static int prism2_hw_init(struct net_device *dev, int initial)
1296{
1297 struct hostap_interface *iface;
1298 local_info_t *local;
1299 int ret, first = 1;
1300 unsigned long start, delay;
1301
1302 PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1303
1304 iface = netdev_priv(dev);
1305 local = iface->local;
1306
1307 clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1308
1309 init:
1310 /* initialize HFA 384x */
1311 ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1312 if (ret) {
1313 printk(KERN_INFO "%s: first command failed - assuming card "
1314 "does not have primary firmware\n", dev_info);
1315 }
1316
1317 if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1318 /* EvStat has Cmd bit set in some cases, so retry once if no
1319 * wait was needed */
1320 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1321 printk(KERN_DEBUG "%s: init command completed too quickly - "
1322 "retrying\n", dev->name);
1323 first = 0;
1324 goto init;
1325 }
1326
1327 start = jiffies;
1328 delay = jiffies + HFA384X_INIT_TIMEOUT;
1329 while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1330 time_before(jiffies, delay))
1331 yield();
1332 if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1333 printk(KERN_DEBUG "%s: assuming no Primary image in "
1334 "flash - card initialization not completed\n",
1335 dev_info);
1336 local->no_pri = 1;
1337#ifdef PRISM2_DOWNLOAD_SUPPORT
1338 if (local->sram_type == -1)
1339 local->sram_type = prism2_get_ram_size(local);
1340#endif /* PRISM2_DOWNLOAD_SUPPORT */
1341 return 1;
1342 }
1343 local->no_pri = 0;
1344 printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1345 (jiffies - start) * 1000 / HZ);
1346 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1347 return 0;
1348}
1349
1350
1351static int prism2_hw_init2(struct net_device *dev, int initial)
1352{
1353 struct hostap_interface *iface;
1354 local_info_t *local;
1355 int i;
1356
1357 iface = netdev_priv(dev);
1358 local = iface->local;
1359
1360#ifdef PRISM2_DOWNLOAD_SUPPORT
1361 kfree(local->pda);
1362 if (local->no_pri)
1363 local->pda = NULL;
1364 else
1365 local->pda = prism2_read_pda(dev);
1366#endif /* PRISM2_DOWNLOAD_SUPPORT */
1367
1368 hfa384x_disable_interrupts(dev);
1369
1370#ifndef final_version
1371 HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1372 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1373 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1374 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1375 goto failed;
1376 }
1377#endif
1378
1379 if (initial || local->pri_only) {
1380 hfa384x_events_only_cmd(dev);
1381 /* get card version information */
1382 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1383 prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1384 hfa384x_disable_interrupts(dev);
1385 goto failed;
1386 }
1387
1388 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1389 printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1390 "- only Primary f/w present\n", dev->name);
1391 local->pri_only = 1;
1392 return 0;
1393 }
1394 local->pri_only = 0;
1395 hfa384x_disable_interrupts(dev);
1396 }
1397
1398 /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1399 * enable interrupts before this. This would also require some sort of
1400 * sleeping AllocEv waiting */
1401
1402 /* allocate TX FIDs */
1403 local->txfid_len = PRISM2_TXFID_LEN;
1404 for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1405 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1406 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1407 local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1408 if (local->txfid[i] != 0xffff) {
1409 printk(KERN_DEBUG "%s: Using shorter TX FID "
1410 "(1600 bytes)\n", dev->name);
1411 local->txfid_len = 1600;
1412 }
1413 }
1414 if (local->txfid[i] == 0xffff)
1415 goto failed;
1416 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1417 }
1418
1419 hfa384x_events_only_cmd(dev);
1420
1421 if (initial) {
1422 struct list_head *ptr;
1423 prism2_check_sta_fw_version(local);
1424
1425 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
3a6d54c5 1426 dev->dev_addr, 6, 1) < 0) {
ff1d2767
JM		 1427 printk("%s: could not get own MAC address\n",
1428 dev->name);
1429 }
1430 list_for_each(ptr, &local->hostap_interfaces) {
1431 iface = list_entry(ptr, struct hostap_interface, list);
1432 memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1433 }
1434 } else if (local->fw_ap)
1435 prism2_check_sta_fw_version(local);
1436
1437 prism2_setup_rids(dev);
1438
1439 /* MAC is now configured, but port 0 is not yet enabled */
1440 return 0;
1441
1442 failed:
1443 if (!local->no_pri)
1444 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1445 return 1;
1446}
1447
1448
1449static int prism2_hw_enable(struct net_device *dev, int initial)
1450{
1451 struct hostap_interface *iface;
1452 local_info_t *local;
1453 int was_resetting;
1454
1455 iface = netdev_priv(dev);
1456 local = iface->local;
1457 was_resetting = local->hw_resetting;
1458
1459 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1460 printk("%s: MAC port 0 enabling failed\n", dev->name);
1461 return 1;
1462 }
1463
1464 local->hw_ready = 1;
1465 local->hw_reset_tries = 0;
1466 local->hw_resetting = 0;
1467 hfa384x_enable_interrupts(dev);
1468
1469 /* at least D-Link DWL-650 seems to require additional port reset
1470 * before it starts acting as an AP, so reset port automatically
1471 * here just in case */
1472 if (initial && prism2_reset_port(dev)) {
1473 printk("%s: MAC port 0 reseting failed\n", dev->name);
1474 return 1;
1475 }
1476
1477 if (was_resetting && netif_queue_stopped(dev)) {
1478 /* If hw_reset() was called during pending transmit, netif
1479 * queue was stopped. Wake it up now since the wlan card has
1480 * been resetted. */
1481 netif_wake_queue(dev);
1482 }
1483
1484 return 0;
1485}
1486
1487
1488static int prism2_hw_config(struct net_device *dev, int initial)
1489{
1490 struct hostap_interface *iface;
1491 local_info_t *local;
1492
1493 iface = netdev_priv(dev);
1494 local = iface->local;
1495
1496 if (local->hw_downloading)
1497 return 1;
1498
1499 if (prism2_hw_init(dev, initial)) {
1500 return local->no_pri ? 0 : 1;
1501 }
1502
1503 if (prism2_hw_init2(dev, initial))
1504 return 1;
1505
1506 /* Enable firmware if secondary image is loaded and at least one of the
1507 * netdevices is up. */
1508 if (!local->pri_only &&
1509 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1510 if (!local->dev_enabled)
1511 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1512 local->dev_enabled = 1;
1513 return prism2_hw_enable(dev, initial);
1514 }
1515
1516 return 0;
1517}
1518
1519
1520static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1521{
1522 struct hostap_interface *iface;
1523 local_info_t *local;
1524
1525 iface = netdev_priv(dev);
1526 local = iface->local;
1527
1528 /* Allow only command completion events during disable */
1529 hfa384x_events_only_cmd(dev);
1530
1531 local->hw_ready = 0;
1532 if (local->dev_enabled)
1533 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1534 local->dev_enabled = 0;
1535
1536 if (local->func->card_present && !local->func->card_present(local)) {
1537 printk(KERN_DEBUG "%s: card already removed or not configured "
1538 "during shutdown\n", dev->name);
1539 return;
1540 }
1541
1542 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1543 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1544 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1545
1546 hfa384x_disable_interrupts(dev);
1547
1548 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1549 hfa384x_events_only_cmd(dev);
1550 else
1551 prism2_clear_cmd_queue(local);
1552}
1553
1554
1555static void prism2_hw_reset(struct net_device *dev)
1556{
1557 struct hostap_interface *iface;
1558 local_info_t *local;
1559
1560#if 0
1561 static long last_reset = 0;
1562
1563 /* do not reset card more than once per second to avoid ending up in a
1564 * busy loop reseting the card */
1565 if (time_before_eq(jiffies, last_reset + HZ))
1566 return;
1567 last_reset = jiffies;
1568#endif
1569
1570 iface = netdev_priv(dev);
1571 local = iface->local;
1572
1573 if (in_interrupt()) {
1574 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1575 "in interrupt context\n", dev->name);
1576 return;
1577 }
1578
1579 if (local->hw_downloading)
1580 return;
1581
1582 if (local->hw_resetting) {
1583 printk(KERN_WARNING "%s: %s: already resetting card - "
1584 "ignoring reset request\n", dev_info, dev->name);
1585 return;
1586 }
1587
1588 local->hw_reset_tries++;
1589 if (local->hw_reset_tries > 10) {
1590 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1591 dev->name);
1592 return;
1593 }
1594
1595 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1596 hfa384x_disable_interrupts(dev);
1597 local->hw_resetting = 1;
1598 if (local->func->cor_sreset) {
1599 /* Host system seems to hang in some cases with high traffic
1600 * load or shared interrupts during COR sreset. Disable shared
1601 * interrupts during reset to avoid these crashes. COS sreset
1602 * takes quite a long time, so it is unfortunate that this
1603 * seems to be needed. Anyway, I do not know of any better way
1604 * of avoiding the crash. */
1605 disable_irq(dev->irq);
1606 local->func->cor_sreset(local);
1607 enable_irq(dev->irq);
1608 }
1609 prism2_hw_shutdown(dev, 1);
1610 prism2_hw_config(dev, 0);
1611 local->hw_resetting = 0;
1612
1613#ifdef PRISM2_DOWNLOAD_SUPPORT
1614 if (local->dl_pri) {
1615 printk(KERN_DEBUG "%s: persistent download of primary "
1616 "firmware\n", dev->name);
1617 if (prism2_download_genesis(local, local->dl_pri) < 0)
1618 printk(KERN_WARNING "%s: download (PRI) failed\n",
1619 dev->name);
1620 }
1621
1622 if (local->dl_sec) {
1623 printk(KERN_DEBUG "%s: persistent download of secondary "
1624 "firmware\n", dev->name);
1625 if (prism2_download_volatile(local, local->dl_sec) < 0)
1626 printk(KERN_WARNING "%s: download (SEC) failed\n",
1627 dev->name);
1628 }
1629#endif /* PRISM2_DOWNLOAD_SUPPORT */
1630
1631 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1632}
1633
1634
1635static void prism2_schedule_reset(local_info_t *local)
1636{
1637 schedule_work(&local->reset_queue);
1638}
1639
1640
1641/* Called only as scheduled task after noticing card timeout in interrupt
1642 * context */
c4028958 1643static void handle_reset_queue(struct work_struct *work)
ff1d2767 1644{
c4028958 1645 local_info_t *local = container_of(work, local_info_t, reset_queue);
ff1d2767
JM		 1646
1647 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1648 prism2_hw_reset(local->dev);
1649
1650 if (netif_queue_stopped(local->dev)) {
1651 int i;
1652
1653 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1654 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1655 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1656 "wake up queue\n");
1657 netif_wake_queue(local->dev);
1658 break;
1659 }
1660 }
1661}
1662
1663
1664static int prism2_get_txfid_idx(local_info_t *local)
1665{
1666 int idx, end;
1667 unsigned long flags;
1668
1669 spin_lock_irqsave(&local->txfidlock, flags);
1670 end = idx = local->next_txfid;
1671 do {
1672 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1673 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1674 spin_unlock_irqrestore(&local->txfidlock, flags);
1675 return idx;
1676 }
1677 idx++;
1678 if (idx >= PRISM2_TXFID_COUNT)
1679 idx = 0;
1680 } while (idx != end);
1681 spin_unlock_irqrestore(&local->txfidlock, flags);
1682
1683 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1684 "packet dropped\n");
4cfa8e45 1685 local->dev->stats.tx_dropped++;
ff1d2767
JM		 1686
1687 return -1;
1688}
1689
1690
1691/* Called only from hardware IRQ */
b15eff26 1692static void prism2_transmit_cb(struct net_device *dev, long context,
ff1d2767
JM		 1693 u16 resp0, u16 res)
1694{
1695 struct hostap_interface *iface;
1696 local_info_t *local;
1697 int idx = (int) context;
1698
1699 iface = netdev_priv(dev);
1700 local = iface->local;
1701
1702 if (res) {
1703 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1704 dev->name, res);
1705 return;
1706 }
1707
1708 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1709 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1710 "idx=%d\n", dev->name, idx);
1711 return;
1712 }
1713
1714 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1715 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1716 "with no pending transmit\n", dev->name);
1717 }
1718
1719 if (netif_queue_stopped(dev)) {
1720 /* ready for next TX, so wake up queue that was stopped in
1721 * prism2_transmit() */
1722 netif_wake_queue(dev);
1723 }
1724
1725 spin_lock(&local->txfidlock);
1726
1727 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1728 * will be automatically allocated for the next TX frame */
1729 local->intransmitfid[idx] = resp0;
1730
1731 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1732 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1733 dev->name, idx, local->txfid[idx],
1734 resp0, local->intransmitfid[local->next_txfid]);
1735
1736 idx++;
1737 if (idx >= PRISM2_TXFID_COUNT)
1738 idx = 0;
1739 local->next_txfid = idx;
1740
1741 /* check if all TX buffers are occupied */
1742 do {
1743 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1744 spin_unlock(&local->txfidlock);
1745 return;
1746 }
1747 idx++;
1748 if (idx >= PRISM2_TXFID_COUNT)
1749 idx = 0;
1750 } while (idx != local->next_txfid);
1751 spin_unlock(&local->txfidlock);
1752
1753 /* no empty TX buffers, stop queue */
1754 netif_stop_queue(dev);
1755}
1756
1757
1758/* Called only from software IRQ if PCI bus master is not used (with bus master
1759 * this can be called both from software and hardware IRQ) */
1760static int prism2_transmit(struct net_device *dev, int idx)
1761{
1762 struct hostap_interface *iface;
1763 local_info_t *local;
1764 int res;
1765
1766 iface = netdev_priv(dev);
1767 local = iface->local;
1768
1769 /* The driver tries to stop netif queue so that there would not be
1770 * more than one attempt to transmit frames going on; check that this
1771 * is really the case */
1772
1773 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1774 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1775 "when previous TX was pending\n", dev->name);
1776 return -1;
1777 }
1778
1779 /* stop the queue for the time that transmit is pending */
1780 netif_stop_queue(dev);
1781
1782 /* transmit packet */
1783 res = hfa384x_cmd_callback(
1784 dev,
1785 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1786 local->txfid[idx],
b15eff26 1787 prism2_transmit_cb, (long) idx);
ff1d2767
JM		 1788
1789 if (res) {
ff1d2767
JM		 1790 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1791 "failed (res=%d)\n", dev->name, res);
4cfa8e45 1792 dev->stats.tx_dropped++;
ff1d2767
JM		 1793 netif_wake_queue(dev);
1794 return -1;
1795 }
1796 dev->trans_start = jiffies;
1797
1798 /* Since we did not wait for command completion, the card continues
1799 * to process on the background and we will finish handling when
1800 * command completion event is handled (prism2_cmd_ev() function) */
1801
1802 return 0;
1803}
1804
1805
ff1d2767
JM		 1806/* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1807 * send the payload with this descriptor) */
1808/* Called only from software IRQ */
1809static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1810{
1811 struct hostap_interface *iface;
1812 local_info_t *local;
1813 struct hfa384x_tx_frame txdesc;
ff1d2767
JM		 1814 struct hostap_skb_tx_data *meta;
1815 int hdr_len, data_len, idx, res, ret = -1;
1816 u16 tx_control, fc;
1817
1818 iface = netdev_priv(dev);
1819 local = iface->local;
1820
1821 meta = (struct hostap_skb_tx_data *) skb->cb;
ff1d2767
JM		 1822
1823 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1824
1825 if ((local->func->card_present && !local->func->card_present(local)) ||
1826 !local->hw_ready || local->hw_downloading || local->pri_only) {
1827 if (net_ratelimit()) {
1828 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1829 " skipping\n", dev->name);
1830 }
1831 goto fail;
1832 }
1833
1834 memset(&txdesc, 0, sizeof(txdesc));
1835
1836 /* skb->data starts with txdesc->frame_control */
1837 hdr_len = 24;
d626f62b 1838 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
ff1d2767 1839 fc = le16_to_cpu(txdesc.frame_control);
1ea893fd
DW		 1840 if (ieee80211_is_data(txdesc.frame_control) &&
1841 ieee80211_has_a4(txdesc.frame_control) &&
b2f4a2e3 1842 skb->len >= 30) {
ff1d2767 1843 /* Addr4 */
d626f62b
ACM		 1844 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1845 ETH_ALEN);
ff1d2767
JM		 1846 hdr_len += ETH_ALEN;
1847 }
1848
1849 tx_control = local->tx_control;
1850 if (meta->tx_cb_idx) {
1851 tx_control |= HFA384X_TX_CTRL_TX_OK;
e0c0056c 1852 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
ff1d2767
JM		 1853 }
1854 txdesc.tx_control = cpu_to_le16(tx_control);
1855 txdesc.tx_rate = meta->rate;
1856
1857 data_len = skb->len - hdr_len;
1858 txdesc.data_len = cpu_to_le16(data_len);
1859 txdesc.len = cpu_to_be16(data_len);
1860
1861 idx = prism2_get_txfid_idx(local);
1862 if (idx < 0)
1863 goto fail;
1864
1865 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1866 hostap_dump_tx_header(dev->name, &txdesc);
1867
1868 spin_lock(&local->baplock);
1869 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1870
ff1d2767
JM		 1871 if (!res)
1872 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1873 if (!res)
1874 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1875 skb->len - hdr_len);
1876 spin_unlock(&local->baplock);
1877
1878 if (!res)
1879 res = prism2_transmit(dev, idx);
1880 if (res) {
1881 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1882 dev->name);
1883 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1884 schedule_work(&local->reset_queue);
1885 goto fail;
1886 }
1887
1888 ret = 0;
1889
1890fail:
1891 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1892 return ret;
1893}
1894
1895
1896/* Some SMP systems have reported number of odd errors with hostap_pci. fid
1897 * register has changed values between consecutive reads for an unknown reason.
1898 * This should really not happen, so more debugging is needed. This test
1899 * version is a big slower, but it will detect most of such register changes
1900 * and will try to get the correct fid eventually. */
1901#define EXTRA_FID_READ_TESTS
1902
858119e1 1903static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
ff1d2767
JM		 1904{
1905#ifdef EXTRA_FID_READ_TESTS
1906 u16 val, val2, val3;
1907 int i;
1908
1909 for (i = 0; i < 10; i++) {
1910 val = HFA384X_INW(reg);
1911 val2 = HFA384X_INW(reg);
1912 val3 = HFA384X_INW(reg);
1913
1914 if (val == val2 && val == val3)
1915 return val;
1916
1917 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1918 " %04x %04x %04x\n",
1919 dev->name, i, reg, val, val2, val3);
1920 if ((val == val2 || val == val3) && val != 0)
1921 return val;
1922 if (val2 == val3 && val2 != 0)
1923 return val2;
1924 }
1925 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1926 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1927 return val;
1928#else /* EXTRA_FID_READ_TESTS */
1929 return HFA384X_INW(reg);
1930#endif /* EXTRA_FID_READ_TESTS */
1931}
1932
1933
1934/* Called only as a tasklet (software IRQ) */
1935static void prism2_rx(local_info_t *local)
1936{
1937 struct net_device *dev = local->dev;
1938 int res, rx_pending = 0;
1939 u16 len, hdr_len, rxfid, status, macport;
ff1d2767
JM		 1940 struct hfa384x_rx_frame rxdesc;
1941 struct sk_buff *skb = NULL;
1942
1943 prism2_callback(local, PRISM2_CALLBACK_RX_START);
ff1d2767
JM		 1944
1945 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1946#ifndef final_version
1947 if (rxfid == 0) {
1948 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1949 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1950 rxfid);
1951 if (rxfid == 0) {
1952 schedule_work(&local->reset_queue);
1953 goto rx_dropped;
1954 }
1955 /* try to continue with the new rxfid value */
1956 }
1957#endif
1958
1959 spin_lock(&local->baplock);
1960 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1961 if (!res)
1962 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1963
1964 if (res) {
1965 spin_unlock(&local->baplock);
1966 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1967 res);
1968 if (res == -ETIMEDOUT) {
1969 schedule_work(&local->reset_queue);
1970 }
1971 goto rx_dropped;
1972 }
1973
1974 len = le16_to_cpu(rxdesc.data_len);
1975 hdr_len = sizeof(rxdesc);
1976 status = le16_to_cpu(rxdesc.status);
1977 macport = (status >> 8) & 0x07;
1978
1979 /* Drop frames with too large reported payload length. Monitor mode
1980 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1981 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1982 * macport 7 */
1983 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1984 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1985 if (len >= (u16) -14) {
1986 hdr_len -= 65535 - len;
1987 hdr_len--;
1988 }
1989 len = 0;
1990 } else {
1991 spin_unlock(&local->baplock);
1992 printk(KERN_DEBUG "%s: Received frame with invalid "
1993 "length 0x%04x\n", dev->name, len);
1994 hostap_dump_rx_header(dev->name, &rxdesc);
1995 goto rx_dropped;
1996 }
1997 }
1998
1999 skb = dev_alloc_skb(len + hdr_len);
2000 if (!skb) {
2001 spin_unlock(&local->baplock);
2002 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2003 dev->name);
2004 goto rx_dropped;
2005 }
2006 skb->dev = dev;
2007 memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2008
ea3f1865
JM		 2009 if (len > 0)
2010 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2011 spin_unlock(&local->baplock);
2012 if (res) {
2013 printk(KERN_DEBUG "%s: RX failed to read "
2014 "frame data\n", dev->name);
2015 goto rx_dropped;
ff1d2767
JM		 2016 }
2017
ea3f1865
JM		 2018 skb_queue_tail(&local->rx_list, skb);
2019 tasklet_schedule(&local->rx_tasklet);
2020
ff1d2767
JM		 2021 rx_exit:
2022 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2023 if (!rx_pending) {
2024 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2025 }
2026
2027 return;
2028
2029 rx_dropped:
4cfa8e45 2030 dev->stats.rx_dropped++;
ff1d2767
JM		 2031 if (skb)
2032 dev_kfree_skb(skb);
2033 goto rx_exit;
2034}
2035
2036
2037/* Called only as a tasklet (software IRQ) */
2038static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2039{
2040 struct hfa384x_rx_frame *rxdesc;
2041 struct net_device *dev = skb->dev;
2042 struct hostap_80211_rx_status stats;
2043 int hdrlen, rx_hdrlen;
2044
2045 rx_hdrlen = sizeof(*rxdesc);
2046 if (skb->len < sizeof(*rxdesc)) {
2047 /* Allow monitor mode to receive shorter frames */
2048 if (local->iw_mode == IW_MODE_MONITOR &&
2049 skb->len >= sizeof(*rxdesc) - 30) {
2050 rx_hdrlen = skb->len;
2051 } else {
2052 dev_kfree_skb(skb);
2053 return;
2054 }
2055 }
2056
2057 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2058
2059 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2060 skb->len >= sizeof(*rxdesc))
2061 hostap_dump_rx_header(dev->name, rxdesc);
2062
2063 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2064 (!local->monitor_allow_fcserr ||
2065 local->iw_mode != IW_MODE_MONITOR))
2066 goto drop;
2067
2068 if (skb->len > PRISM2_DATA_MAXLEN) {
2069 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2070 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2071 goto drop;
2072 }
2073
2074 stats.mac_time = le32_to_cpu(rxdesc->time);
2075 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2076 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2077 stats.rate = rxdesc->rate;
2078
2079 /* Convert Prism2 RX structure into IEEE 802.11 header */
1ea893fd 2080 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
ff1d2767
JM		 2081 if (hdrlen > rx_hdrlen)
2082 hdrlen = rx_hdrlen;
2083
2084 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2085 &rxdesc->frame_control, hdrlen);
2086
2087 hostap_80211_rx(dev, skb, &stats);
2088 return;
2089
2090 drop:
2091 dev_kfree_skb(skb);
2092}
2093
2094
2095/* Called only as a tasklet (software IRQ) */
2096static void hostap_rx_tasklet(unsigned long data)
2097{
2098 local_info_t *local = (local_info_t *) data;
2099 struct sk_buff *skb;
2100
2101 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2102 hostap_rx_skb(local, skb);
2103}
2104
2105
2106/* Called only from hardware IRQ */
2107static void prism2_alloc_ev(struct net_device *dev)
2108{
2109 struct hostap_interface *iface;
2110 local_info_t *local;
2111 int idx;
2112 u16 fid;
2113
2114 iface = netdev_priv(dev);
2115 local = iface->local;
2116
2117 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2118
2119 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2120
2121 spin_lock(&local->txfidlock);
2122 idx = local->next_alloc;
2123
2124 do {
2125 if (local->txfid[idx] == fid) {
2126 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2127 idx);
2128
2129#ifndef final_version
2130 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2131 printk("Already released txfid found at idx "
2132 "%d\n", idx);
2133 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2134 printk("Already reserved txfid found at idx "
2135 "%d\n", idx);
2136#endif
2137 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2138 idx++;
2139 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2140 idx;
2141
2142 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2143 netif_queue_stopped(dev))
2144 netif_wake_queue(dev);
2145
2146 spin_unlock(&local->txfidlock);
2147 return;
2148 }
2149
2150 idx++;
2151 if (idx >= PRISM2_TXFID_COUNT)
2152 idx = 0;
2153 } while (idx != local->next_alloc);
2154
2155 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2156 "read 0x%04x) for alloc event\n", dev->name, fid,
2157 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2158 printk(KERN_DEBUG "TXFIDs:");
2159 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2160 printk(" %04x[%04x]", local->txfid[idx],
2161 local->intransmitfid[idx]);
2162 printk("\n");
2163 spin_unlock(&local->txfidlock);
2164
2165 /* FIX: should probably schedule reset; reference to one txfid was lost
2166 * completely.. Bad things will happen if we run out of txfids
2167 * Actually, this will cause netdev watchdog to notice TX timeout and
2168 * then card reset after all txfids have been leaked. */
2169}
2170
2171
2172/* Called only as a tasklet (software IRQ) */
2173static void hostap_tx_callback(local_info_t *local,
2174 struct hfa384x_tx_frame *txdesc, int ok,
2175 char *payload)
2176{
2177 u16 sw_support, hdrlen, len;
2178 struct sk_buff *skb;
2179 struct hostap_tx_callback_info *cb;
2180
2181 /* Make sure that frame was from us. */
2182 if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2183 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2184 local->dev->name);
2185 return;
2186 }
2187
e0c0056c 2188 sw_support = le32_to_cpu(txdesc->sw_support);
ff1d2767
JM		 2189
2190 spin_lock(&local->lock);
2191 cb = local->tx_callback;
2192 while (cb != NULL && cb->idx != sw_support)
2193 cb = cb->next;
2194 spin_unlock(&local->lock);
2195
2196 if (cb == NULL) {
2197 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2198 local->dev->name, sw_support);
2199 return;
2200 }
2201
1ea893fd 2202 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
ff1d2767
JM		 2203 len = le16_to_cpu(txdesc->data_len);
2204 skb = dev_alloc_skb(hdrlen + len);
2205 if (skb == NULL) {
2206 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2207 "skb\n", local->dev->name);
2208 return;
2209 }
2210
2211 memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2212 if (payload)
2213 memcpy(skb_put(skb, len), payload, len);
2214
2215 skb->dev = local->dev;
459a98ed 2216 skb_reset_mac_header(skb);
ff1d2767
JM		 2217
2218 cb->func(skb, ok, cb->data);
2219}
2220
2221
2222/* Called only as a tasklet (software IRQ) */
2223static int hostap_tx_compl_read(local_info_t *local, int error,
2224 struct hfa384x_tx_frame *txdesc,
2225 char **payload)
2226{
2227 u16 fid, len;
2228 int res, ret = 0;
2229 struct net_device *dev = local->dev;
2230
2231 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2232
2233 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2234
2235 spin_lock(&local->baplock);
2236 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2237 if (!res)
2238 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2239 if (res) {
2240 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2241 "read txdesc\n", dev->name, error, fid);
2242 if (res == -ETIMEDOUT) {
2243 schedule_work(&local->reset_queue);
2244 }
2245 ret = -1;
2246 goto fail;
2247 }
2248 if (txdesc->sw_support) {
2249 len = le16_to_cpu(txdesc->data_len);
2250 if (len < PRISM2_DATA_MAXLEN) {
5cbded58 2251 *payload = kmalloc(len, GFP_ATOMIC);
ff1d2767
JM		 2252 if (*payload == NULL ||
2253 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2254 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2255 "frame payload\n", dev->name);
2256 kfree(*payload);
2257 *payload = NULL;
2258 ret = -1;
2259 goto fail;
2260 }
2261 }
2262 }
2263
2264 fail:
2265 spin_unlock(&local->baplock);
2266
2267 return ret;
2268}
2269
2270
2271/* Called only as a tasklet (software IRQ) */
2272static void prism2_tx_ev(local_info_t *local)
2273{
2274 struct net_device *dev = local->dev;
2275 char *payload = NULL;
2276 struct hfa384x_tx_frame txdesc;
2277
2278 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2279 goto fail;
2280
2281 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2282 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2283 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2284 "duration_id=%d\n",
2285 dev->name, le16_to_cpu(txdesc.status),
2286 txdesc.retry_count, txdesc.tx_rate,
2287 le16_to_cpu(txdesc.seq_ctrl),
2288 le16_to_cpu(txdesc.duration_id));
2289 }
2290
2291 if (txdesc.sw_support)
2292 hostap_tx_callback(local, &txdesc, 1, payload);
2293 kfree(payload);
2294
2295 fail:
2296 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2297}
2298
2299
2300/* Called only as a tasklet (software IRQ) */
2301static void hostap_sta_tx_exc_tasklet(unsigned long data)
2302{
2303 local_info_t *local = (local_info_t *) data;
2304 struct sk_buff *skb;
2305
2306 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2307 struct hfa384x_tx_frame *txdesc =
2308 (struct hfa384x_tx_frame *) skb->data;
2309
2310 if (skb->len >= sizeof(*txdesc)) {
2311 /* Convert Prism2 RX structure into IEEE 802.11 header
2312 */
1ea893fd 2313 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
ff1d2767
JM		 2314 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2315 &txdesc->frame_control, hdrlen);
2316
2317 hostap_handle_sta_tx_exc(local, skb);
2318 }
2319 dev_kfree_skb(skb);
2320 }
2321}
2322
2323
2324/* Called only as a tasklet (software IRQ) */
2325static void prism2_txexc(local_info_t *local)
2326{
2327 struct net_device *dev = local->dev;
2328 u16 status, fc;
2329 int show_dump, res;
2330 char *payload = NULL;
2331 struct hfa384x_tx_frame txdesc;
2332
2333 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
4cfa8e45 2334 dev->stats.tx_errors++;
ff1d2767
JM		 2335
2336 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2337 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2338 if (res)
2339 return;
2340
2341 status = le16_to_cpu(txdesc.status);
2342
2343 /* We produce a TXDROP event only for retry or lifetime
2344 * exceeded, because that's the only status that really mean
2345 * that this particular node went away.
2346 * Other errors means that *we* screwed up. - Jean II */
2347 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2348 {
2349 union iwreq_data wrqu;
2350
2351 /* Copy 802.11 dest address. */
2352 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2353 wrqu.addr.sa_family = ARPHRD_ETHER;
2354 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2355 } else
2356 show_dump = 1;
2357
2358 if (local->iw_mode == IW_MODE_MASTER ||
2359 local->iw_mode == IW_MODE_REPEAT ||
2360 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2361 struct sk_buff *skb;
2362 skb = dev_alloc_skb(sizeof(txdesc));
2363 if (skb) {
2364 memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2365 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,
1ea893fd
DW		 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" : "");
e174961c
JB		 2397 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2398 txdesc.addr1, txdesc.addr2,
2399 txdesc.addr3, txdesc.addr4);
ff1d2767
JM		 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
184a3b2c 2441 left = (le16_to_cpu(info.len) - 1) * 2;
ff1d2767 2442
184a3b2c 2443 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
ff1d2767
JM		 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 "
184a3b2c
AV		 2449 "length 0x%04x (type 0x%04x)\n", dev->name,
2450 le16_to_cpu(info.len), le16_to_cpu(info.type));
ff1d2767
JM		 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 memcpy(skb_put(skb, sizeof(info)), &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, "
184a3b2c
AV		 2467 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2468 le16_to_cpu(info.len), le16_to_cpu(info.type));
ff1d2767
JM		 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
ff1d2767
JM		 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,
b15eff26 2534 HFA384X_INFO_COMMTALLIES, NULL, 0);
ff1d2767
JM		 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 */
858119e1 2574static void prism2_check_magic(local_info_t *local)
ff1d2767
JM		 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 */
7d12e780 2613static irqreturn_t prism2_interrupt(int irq, void *dev_id)
ff1d2767 2614{
28fc1f5a 2615 struct net_device *dev = dev_id;
ff1d2767
JM		 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
d6a574ff
TG		 2624 /* Detect early interrupt before driver is fully configued */
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
ff1d2767
JM		 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
ff1d2767
JM		 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
ff1d2767
JM		 2797static void hostap_passive_scan(unsigned long data)
2798{
2799 local_info_t *local = (local_info_t *) data;
2800 struct net_device *dev = local->dev;
1bcca3c4 2801 u16 chan;
ff1d2767
JM		 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);
1bcca3c4 2838 chan = local->passive_scan_channel;
ff1d2767
JM		 2839 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2840 local->passive_scan_timer.expires = jiffies + HZ / 10;
2841 } else {
1bcca3c4 2842 chan = local->channel;
ff1d2767
JM		 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),
1bcca3c4 2850 chan, NULL, 0))
ff1d2767 2851 printk(KERN_ERR "%s: passive scan channel set %d "
1bcca3c4 2852 "failed\n", dev->name, chan);
ff1d2767
JM		 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. */
c4028958 2860static void handle_comms_qual_update(struct work_struct *work)
ff1d2767 2861{
c4028958
DH		 2862 local_info_t *local =
2863 container_of(work, local_info_t, comms_qual_update);
ff1d2767
JM		 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(unsigned long data)
2873{
2874 static unsigned long last_inquire = 0;
2875 local_info_t *local = (local_info_t *) data;
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,
b15eff26 2884 HFA384X_INFO_COMMTALLIES, NULL, 0);
ff1d2767
JM		 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_read(char *page, char **start, off_t off,
2902 int count, int *eof, void *data)
2903{
2904 char *p = page;
2905 local_info_t *local = (local_info_t *) data;
2906
2907 if (off != 0) {
2908 *eof = 1;
2909 return 0;
2910 }
2911
2912#define SHOW_REG(n) \
2913p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2914
2915 SHOW_REG(CMD);
2916 SHOW_REG(PARAM0);
2917 SHOW_REG(PARAM1);
2918 SHOW_REG(PARAM2);
2919 SHOW_REG(STATUS);
2920 SHOW_REG(RESP0);
2921 SHOW_REG(RESP1);
2922 SHOW_REG(RESP2);
2923 SHOW_REG(INFOFID);
2924 SHOW_REG(CONTROL);
2925 SHOW_REG(SELECT0);
2926 SHOW_REG(SELECT1);
2927 SHOW_REG(OFFSET0);
2928 SHOW_REG(OFFSET1);
2929 SHOW_REG(RXFID);
2930 SHOW_REG(ALLOCFID);
2931 SHOW_REG(TXCOMPLFID);
2932 SHOW_REG(SWSUPPORT0);
2933 SHOW_REG(SWSUPPORT1);
2934 SHOW_REG(SWSUPPORT2);
2935 SHOW_REG(EVSTAT);
2936 SHOW_REG(INTEN);
2937 SHOW_REG(EVACK);
2938 /* Do not read data registers, because they change the state of the
2939 * MAC (offset += 2) */
2940 /* SHOW_REG(DATA0); */
2941 /* SHOW_REG(DATA1); */
2942 SHOW_REG(AUXPAGE);
2943 SHOW_REG(AUXOFFSET);
2944 /* SHOW_REG(AUXDATA); */
2945#ifdef PRISM2_PCI
2946 SHOW_REG(PCICOR);
2947 SHOW_REG(PCIHCR);
2948 SHOW_REG(PCI_M0_ADDRH);
2949 SHOW_REG(PCI_M0_ADDRL);
2950 SHOW_REG(PCI_M0_LEN);
2951 SHOW_REG(PCI_M0_CTL);
2952 SHOW_REG(PCI_STATUS);
2953 SHOW_REG(PCI_M1_ADDRH);
2954 SHOW_REG(PCI_M1_ADDRL);
2955 SHOW_REG(PCI_M1_LEN);
2956 SHOW_REG(PCI_M1_CTL);
2957#endif /* PRISM2_PCI */
2958
2959 return (p - page);
2960}
2961#endif /* PRISM2_NO_PROCFS_DEBUG */
2962
2963
2964struct set_tim_data {
2965 struct list_head list;
2966 int aid;
2967 int set;
2968};
2969
2970static int prism2_set_tim(struct net_device *dev, int aid, int set)
2971{
2972 struct list_head *ptr;
2973 struct set_tim_data *new_entry;
2974 struct hostap_interface *iface;
2975 local_info_t *local;
2976
2977 iface = netdev_priv(dev);
2978 local = iface->local;
2979
b0471bb7 2980 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
ff1d2767
JM		 2981 if (new_entry == NULL) {
2982 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
2983 local->dev->name);
2984 return -ENOMEM;
2985 }
ff1d2767
JM		 2986 new_entry->aid = aid;
2987 new_entry->set = set;
2988
2989 spin_lock_bh(&local->set_tim_lock);
2990 list_for_each(ptr, &local->set_tim_list) {
2991 struct set_tim_data *entry =
2992 list_entry(ptr, struct set_tim_data, list);
2993 if (entry->aid == aid) {
2994 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2995 "set=%d ==> %d\n",
2996 local->dev->name, aid, entry->set, set);
2997 entry->set = set;
2998 kfree(new_entry);
2999 new_entry = NULL;
3000 break;
3001 }
3002 }
3003 if (new_entry)
3004 list_add_tail(&new_entry->list, &local->set_tim_list);
3005 spin_unlock_bh(&local->set_tim_lock);
3006
3007 schedule_work(&local->set_tim_queue);
3008
3009 return 0;
3010}
3011
3012
c4028958 3013static void handle_set_tim_queue(struct work_struct *work)
ff1d2767 3014{
c4028958 3015 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
ff1d2767
JM		 3016 struct set_tim_data *entry;
3017 u16 val;
3018
3019 for (;;) {
3020 entry = NULL;
3021 spin_lock_bh(&local->set_tim_lock);
3022 if (!list_empty(&local->set_tim_list)) {
3023 entry = list_entry(local->set_tim_list.next,
3024 struct set_tim_data, list);
3025 list_del(&entry->list);
3026 }
3027 spin_unlock_bh(&local->set_tim_lock);
3028 if (!entry)
3029 break;
3030
3031 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3032 local->dev->name, entry->aid, entry->set);
3033
3034 val = entry->aid;
3035 if (entry->set)
3036 val |= 0x8000;
3037 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3038 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3039 "set=%d)\n",
3040 local->dev->name, entry->aid, entry->set);
3041 }
3042
3043 kfree(entry);
3044 }
3045}
3046
3047
3048static void prism2_clear_set_tim_queue(local_info_t *local)
3049{
3050 struct list_head *ptr, *n;
3051
3052 list_for_each_safe(ptr, n, &local->set_tim_list) {
3053 struct set_tim_data *entry;
3054 entry = list_entry(ptr, struct set_tim_data, list);
3055 list_del(&entry->list);
3056 kfree(entry);
3057 }
3058}
3059
3060
cd11acdd
AV		 3061/*
3062 * HostAP uses two layers of net devices, where the inner
3063 * layer gets called all the time from the outer layer.
3064 * This is a natural nesting, which needs a split lock type.
3065 */
3066static struct lock_class_key hostap_netdev_xmit_lock_key;
cf508b12 3067static struct lock_class_key hostap_netdev_addr_lock_key;
cd11acdd 3068
e8a0464c
DM		 3069static void prism2_set_lockdep_class_one(struct net_device *dev,
3070 struct netdev_queue *txq,
3071 void *_unused)
c773e847
DM		 3072{
3073 lockdep_set_class(&txq->_xmit_lock,
3074 &hostap_netdev_xmit_lock_key);
3075}
3076
3077static void prism2_set_lockdep_class(struct net_device *dev)
3078{
cf508b12
DM		 3079 lockdep_set_class(&dev->addr_list_lock,
3080 &hostap_netdev_addr_lock_key);
e8a0464c 3081 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
c773e847 3082}
cd11acdd 3083
ff1d2767 3084static struct net_device *
0cd545d6
DH		 3085prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3086 struct device *sdev)
ff1d2767
JM		 3087{
3088 struct net_device *dev;
3089 struct hostap_interface *iface;
3090 struct local_info *local;
3091 int len, i, ret;
3092
3093 if (funcs == NULL)
3094 return NULL;
3095
3096 len = strlen(dev_template);
3097 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3098 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3099 dev_template);
3100 return NULL;
3101 }
3102
3103 len = sizeof(struct hostap_interface) +
3104 3 + sizeof(struct local_info) +
3105 3 + sizeof(struct ap_data);
3106
3107 dev = alloc_etherdev(len);
3108 if (dev == NULL)
3109 return NULL;
3110
3111 iface = netdev_priv(dev);
3112 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3113 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3114 local->dev = iface->dev = dev;
3115 iface->local = local;
3116 iface->type = HOSTAP_INTERFACE_MASTER;
3117 INIT_LIST_HEAD(&local->hostap_interfaces);
3118
3119 local->hw_module = THIS_MODULE;
3120
3121#ifdef PRISM2_IO_DEBUG
3122 local->io_debug_enabled = 1;
3123#endif /* PRISM2_IO_DEBUG */
3124
ff1d2767
JM		 3125 local->func = funcs;
3126 local->func->cmd = hfa384x_cmd;
3127 local->func->read_regs = hfa384x_read_regs;
3128 local->func->get_rid = hfa384x_get_rid;
3129 local->func->set_rid = hfa384x_set_rid;
3130 local->func->hw_enable = prism2_hw_enable;
3131 local->func->hw_config = prism2_hw_config;
3132 local->func->hw_reset = prism2_hw_reset;
3133 local->func->hw_shutdown = prism2_hw_shutdown;
3134 local->func->reset_port = prism2_reset_port;
3135 local->func->schedule_reset = prism2_schedule_reset;
3136#ifdef PRISM2_DOWNLOAD_SUPPORT
3137 local->func->read_aux = prism2_download_aux_dump;
3138 local->func->download = prism2_download;
3139#endif /* PRISM2_DOWNLOAD_SUPPORT */
3140 local->func->tx = prism2_tx_80211;
3141 local->func->set_tim = prism2_set_tim;
3142 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3143 * skb->data (FIX: maybe for DMA bus
3144 * mastering? */
3145
3146 local->mtu = mtu;
3147
3148 rwlock_init(&local->iface_lock);
3149 spin_lock_init(&local->txfidlock);
3150 spin_lock_init(&local->cmdlock);
3151 spin_lock_init(&local->baplock);
3152 spin_lock_init(&local->lock);
d6a574ff 3153 spin_lock_init(&local->irq_init_lock);
3623060a 3154 mutex_init(&local->rid_bap_mtx);
ff1d2767
JM		 3155
3156 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3157 card_idx = 0;
3158 local->card_idx = card_idx;
3159
3160 len = strlen(essid);
3161 memcpy(local->essid, essid,
3162 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3163 local->essid[MAX_SSID_LEN] = '\0';
3164 i = GET_INT_PARM(iw_mode, card_idx);
3165 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3166 i == IW_MODE_MONITOR) {
3167 local->iw_mode = i;
3168 } else {
3169 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3170 "IW_MODE_MASTER\n", i);
3171 local->iw_mode = IW_MODE_MASTER;
3172 }
3173 local->channel = GET_INT_PARM(channel, card_idx);
3174 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3175 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3176 local->wds_max_connections = 16;
3177 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3178 local->manual_retry_count = -1;
3179 local->rts_threshold = 2347;
3180 local->fragm_threshold = 2346;
3181 local->rssi_to_dBm = 100; /* default; to be overriden by
3182 * cnfDbmAdjust, if available */
3183 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3184 local->sram_type = -1;
72ca9c61 3185 local->scan_channel_mask = 0xffff;
7cd8d3ea 3186 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
ff1d2767
JM		 3187
3188 /* Initialize task queue structures */
c4028958 3189 INIT_WORK(&local->reset_queue, handle_reset_queue);
ff1d2767 3190 INIT_WORK(&local->set_multicast_list_queue,
c4028958 3191 hostap_set_multicast_list_queue);
ff1d2767 3192
c4028958 3193 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
ff1d2767
JM		 3194 INIT_LIST_HEAD(&local->set_tim_list);
3195 spin_lock_init(&local->set_tim_lock);
3196
c4028958 3197 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
ff1d2767
JM		 3198
3199 /* Initialize tasklets for handling hardware IRQ related operations
3200 * outside hw IRQ handler */
3201#define HOSTAP_TASKLET_INIT(q, f, d) \
3202do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3203while (0)
3204 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3205 (unsigned long) local);
3206
3207 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3208 (unsigned long) local);
3209 hostap_info_init(local);
3210
3211 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3212 hostap_rx_tasklet, (unsigned long) local);
3213 skb_queue_head_init(&local->rx_list);
3214
3215 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3216 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3217 skb_queue_head_init(&local->sta_tx_exc_list);
3218
3219 INIT_LIST_HEAD(&local->cmd_queue);
3220 init_waitqueue_head(&local->hostscan_wq);
274bfb8d 3221
2ba4b32e 3222 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
ff1d2767
JM		 3223
3224 init_timer(&local->passive_scan_timer);
3225 local->passive_scan_timer.data = (unsigned long) local;
3226 local->passive_scan_timer.function = hostap_passive_scan;
3227
3228 init_timer(&local->tick_timer);
3229 local->tick_timer.data = (unsigned long) local;
3230 local->tick_timer.function = hostap_tick_timer;
3231 local->tick_timer.expires = jiffies + 2 * HZ;
3232 add_timer(&local->tick_timer);
3233
3234 INIT_LIST_HEAD(&local->bss_list);
3235
09703f5e 3236 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
ff1d2767 3237
ff1d2767 3238 dev->type = ARPHRD_IEEE80211;
3b04ddde 3239 dev->header_ops = &hostap_80211_ops;
ff1d2767
JM		 3240
3241 rtnl_lock();
3242 ret = dev_alloc_name(dev, "wifi%d");
0cd545d6 3243 SET_NETDEV_DEV(dev, sdev);
ff1d2767
JM		 3244 if (ret >= 0)
3245 ret = register_netdevice(dev);
cd11acdd 3246
c773e847 3247 prism2_set_lockdep_class(dev);
ff1d2767
JM		 3248 rtnl_unlock();
3249 if (ret < 0) {
3250 printk(KERN_WARNING "%s: register netdevice failed!\n",
3251 dev_info);
3252 goto fail;
3253 }
3254 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3255
ff1d2767
JM		 3256 hostap_init_data(local);
3257 return dev;
3258
3259 fail:
ff1d2767
JM		 3260 free_netdev(dev);
3261 return NULL;
3262}
3263
3264
3265static int hostap_hw_ready(struct net_device *dev)
3266{
3267 struct hostap_interface *iface;
3268 struct local_info *local;
3269
3270 iface = netdev_priv(dev);
3271 local = iface->local;
3272 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3273 "", dev_template);
3274
3275 if (local->ddev) {
3276 if (local->iw_mode == IW_MODE_INFRA ||
3277 local->iw_mode == IW_MODE_ADHOC) {
3278 netif_carrier_off(local->dev);
3279 netif_carrier_off(local->ddev);
3280 }
3281 hostap_init_proc(local);
23f40dc6
MCS		 3282#ifndef PRISM2_NO_PROCFS_DEBUG
3283 create_proc_read_entry("registers", 0, local->proc,
3284 prism2_registers_proc_read, local);
3285#endif /* PRISM2_NO_PROCFS_DEBUG */
ff1d2767
JM		 3286 hostap_init_ap_proc(local);
3287 return 0;
3288 }
3289
3290 return -1;
3291}
3292
3293
3294static void prism2_free_local_data(struct net_device *dev)
3295{
3296 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3297 int i;
3298 struct hostap_interface *iface;
3299 struct local_info *local;
3300 struct list_head *ptr, *n;
3301
3302 if (dev == NULL)
3303 return;
3304
3305 iface = netdev_priv(dev);
3306 local = iface->local;
3307
7cb3cd09
JM		 3308 /* Unregister all netdevs before freeing local data. */
3309 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3310 iface = list_entry(ptr, struct hostap_interface, list);
3311 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3312 /* special handling for this interface below */
3313 continue;
3314 }
3315 hostap_remove_interface(iface->dev, 0, 1);
3316 }
3317
3318 unregister_netdev(local->dev);
3319
ff1d2767
JM		 3320 flush_scheduled_work();
3321
2ba4b32e 3322 lib80211_crypt_info_free(&local->crypt_info);
ff1d2767
JM		 3323
3324 if (timer_pending(&local->passive_scan_timer))
3325 del_timer(&local->passive_scan_timer);
3326
3327 if (timer_pending(&local->tick_timer))
3328 del_timer(&local->tick_timer);
3329
3330 prism2_clear_cmd_queue(local);
3331
3332 skb_queue_purge(&local->info_list);
3333 skb_queue_purge(&local->rx_list);
3334 skb_queue_purge(&local->sta_tx_exc_list);
3335
3336 if (local->dev_enabled)
3337 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3338
ff1d2767
JM		 3339 if (local->ap != NULL)
3340 hostap_free_data(local->ap);
3341
3342#ifndef PRISM2_NO_PROCFS_DEBUG
3343 if (local->proc != NULL)
3344 remove_proc_entry("registers", local->proc);
3345#endif /* PRISM2_NO_PROCFS_DEBUG */
3346 hostap_remove_proc(local);
3347
3348 tx_cb = local->tx_callback;
3349 while (tx_cb != NULL) {
3350 tx_cb_prev = tx_cb;
3351 tx_cb = tx_cb->next;
3352 kfree(tx_cb_prev);
3353 }
3354
3355 hostap_set_hostapd(local, 0, 0);
3356 hostap_set_hostapd_sta(local, 0, 0);
3357
3358 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3359 if (local->frag_cache[i].skb != NULL)
3360 dev_kfree_skb(local->frag_cache[i].skb);
3361 }
3362
3363#ifdef PRISM2_DOWNLOAD_SUPPORT
3364 prism2_download_free_data(local->dl_pri);
3365 prism2_download_free_data(local->dl_sec);
3366#endif /* PRISM2_DOWNLOAD_SUPPORT */
3367
ff1d2767
JM		 3368 prism2_clear_set_tim_queue(local);
3369
3370 list_for_each_safe(ptr, n, &local->bss_list) {
3371 struct hostap_bss_info *bss =
3372 list_entry(ptr, struct hostap_bss_info, list);
3373 kfree(bss);
3374 }
3375
ff1d2767
JM		 3376 kfree(local->pda);
3377 kfree(local->last_scan_results);
3378 kfree(local->generic_elem);
3379
ff1d2767
JM		 3380 free_netdev(local->dev);
3381}
3382
3383
0ac2a00c 3384#if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
ff1d2767
JM		 3385static void prism2_suspend(struct net_device *dev)
3386{
3387 struct hostap_interface *iface;
3388 struct local_info *local;
3389 union iwreq_data wrqu;
3390
6dbc9c89 3391 iface = netdev_priv(dev);
ff1d2767
JM		 3392 local = iface->local;
3393
3394 /* Send disconnect event, e.g., to trigger reassociation after resume
3395 * if wpa_supplicant is used. */
3396 memset(&wrqu, 0, sizeof(wrqu));
3397 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3398 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3399
3400 /* Disable hardware and firmware */
3401 prism2_hw_shutdown(dev, 0);
3402}
0ac2a00c 3403#endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
ff1d2767
JM		 3404
3405
3406/* These might at some point be compiled separately and used as separate
3407 * kernel modules or linked into one */
3408#ifdef PRISM2_DOWNLOAD_SUPPORT
3409#include "hostap_download.c"
3410#endif /* PRISM2_DOWNLOAD_SUPPORT */
3411
3412#ifdef PRISM2_CALLBACK
3413/* External hostap_callback.c file can be used to, e.g., blink activity led.
3414 * This can use platform specific code and must define prism2_callback()
3415 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3416 * used. */
3417#include "hostap_callback.c"
3418#endif /* PRISM2_CALLBACK */
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