1 /*
2  * Host AP (software wireless LAN access point) driver for
3  * Intersil Prism2/2.5/3.
4  *
5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6  * <j@w1.fi>
7  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation. See README and COPYING for
12  * more details.
13  *
14  * FIX:
15  * - there is currently no way of associating TX packets to correct wds device
16  *   when TX Exc/OK event occurs, so all tx_packets and some
17  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
18  *   field in txdesc might be used to fix this (using Alloc event to increment
19  *   tx_packets would need some further info in txfid table)
20  *
21  * Buffer Access Path (BAP) usage:
22  *   Prism2 cards have two separate BAPs for accessing the card memory. These
23  *   should allow concurrent access to two different frames and the driver
24  *   previously used BAP0 for sending data and BAP1 for receiving data.
25  *   However, there seems to be number of issues with concurrent access and at
26  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
27  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
28  *   host and card memories. BAP0 accesses are protected with local->baplock
29  *   (spin_lock_bh) to prevent concurrent use.
30  */
31 
32 
33 
34 #include <asm/delay.h>
35 #include <linux/uaccess.h>
36 
37 #include <linux/slab.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/proc_fs.h>
41 #include <linux/seq_file.h>
42 #include <linux/if_arp.h>
43 #include <linux/delay.h>
44 #include <linux/random.h>
45 #include <linux/wait.h>
46 #include <linux/sched/signal.h>
47 #include <linux/rtnetlink.h>
48 #include <linux/wireless.h>
49 #include <net/iw_handler.h>
50 #include <net/lib80211.h>
51 #include <asm/irq.h>
52 
53 #include "hostap_80211.h"
54 #include "hostap.h"
55 #include "hostap_ap.h"
56 
57 
58 /* #define final_version */
59 
60 static int mtu = 1500;
61 module_param(mtu, int, 0444);
62 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
63 
64 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
65 module_param_array(channel, int, NULL, 0444);
66 MODULE_PARM_DESC(channel, "Initial channel");
67 
68 static char essid[33] = "test";
69 module_param_string(essid, essid, sizeof(essid), 0444);
70 MODULE_PARM_DESC(essid, "Host AP's ESSID");
71 
72 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
73 module_param_array(iw_mode, int, NULL, 0444);
74 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
75 
76 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
77 module_param_array(beacon_int, int, NULL, 0444);
78 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
79 
80 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
81 module_param_array(dtim_period, int, NULL, 0444);
82 MODULE_PARM_DESC(dtim_period, "DTIM period");
83 
84 static char dev_template[16] = "wlan%d";
85 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
86 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
87 		 "wlan%d)");
88 
89 #ifdef final_version
90 #define EXTRA_EVENTS_WTERR 0
91 #else
92 /* check WTERR events (Wait Time-out) in development versions */
93 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
94 #endif
95 
96 /* Events that will be using BAP0 */
97 #define HFA384X_BAP0_EVENTS \
98 	(HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
99 
100 /* event mask, i.e., events that will result in an interrupt */
101 #define HFA384X_EVENT_MASK \
102 	(HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
103 	HFA384X_EV_CMD | HFA384X_EV_TICK | \
104 	EXTRA_EVENTS_WTERR)
105 
106 /* Default TX control flags: use 802.11 headers and request interrupt for
107  * failed transmits. Frames that request ACK callback, will add
108  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
109  */
110 #define HFA384X_TX_CTRL_FLAGS \
111 	(HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
112 
113 
114 /* ca. 1 usec */
115 #define HFA384X_CMD_BUSY_TIMEOUT 5000
116 #define HFA384X_BAP_BUSY_TIMEOUT 50000
117 
118 /* ca. 10 usec */
119 #define HFA384X_CMD_COMPL_TIMEOUT 20000
120 #define HFA384X_DL_COMPL_TIMEOUT 1000000
121 
122 /* Wait times for initialization; yield to other processes to avoid busy
123  * waiting for long time. */
124 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
125 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
126 
127 
128 static void prism2_hw_reset(struct net_device *dev);
129 static void prism2_check_sta_fw_version(local_info_t *local);
130 
131 #ifdef PRISM2_DOWNLOAD_SUPPORT
132 /* hostap_download.c */
133 static const struct file_operations prism2_download_aux_dump_proc_fops;
134 static u8 * prism2_read_pda(struct net_device *dev);
135 static int prism2_download(local_info_t *local,
136 			   struct prism2_download_param *param);
137 static void prism2_download_free_data(struct prism2_download_data *dl);
138 static int prism2_download_volatile(local_info_t *local,
139 				    struct prism2_download_data *param);
140 static int prism2_download_genesis(local_info_t *local,
141 				   struct prism2_download_data *param);
142 static int prism2_get_ram_size(local_info_t *local);
143 #endif /* PRISM2_DOWNLOAD_SUPPORT */
144 
145 
146 
147 
148 #ifndef final_version
149 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
150  * present */
151 #define HFA384X_MAGIC 0x8A32
152 #endif
153 
154 
155 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
156 {
157 	return HFA384X_INW(reg);
158 }
159 
160 
161 static 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  */
181 static inline void __hostap_cmd_queue_free(local_info_t *local,
182 					   struct hostap_cmd_queue *entry,
183 					   int del_req)
184 {
185 	if (del_req) {
186 		entry->del_req = 1;
187 		if (!list_empty(&entry->list)) {
188 			list_del_init(&entry->list);
189 			local->cmd_queue_len--;
190 		}
191 	}
192 
193 	if (refcount_dec_and_test(&entry->usecnt) && entry->del_req)
194 		kfree(entry);
195 }
196 
197 
198 /**
199  * hostap_cmd_queue_free - Free Prism2 command queue entry
200  * @local: pointer to private Host AP driver data
201  * @entry: Prism2 command queue entry to be freed
202  * @del_req: request the entry to be removed
203  *
204  * Free a Prism2 command queue entry.
205  */
206 static 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  */
222 static void prism2_clear_cmd_queue(local_info_t *local)
223 {
224 	struct list_head *ptr, *n;
225 	unsigned long flags;
226 	struct hostap_cmd_queue *entry;
227 
228 	spin_lock_irqsave(&local->cmdlock, flags);
229 	list_for_each_safe(ptr, n, &local->cmd_queue) {
230 		entry = list_entry(ptr, struct hostap_cmd_queue, list);
231 		refcount_inc(&entry->usecnt);
232 		printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
233 		       "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
234 		       local->dev->name, entry->type, entry->cmd,
235 		       entry->param0);
236 		__hostap_cmd_queue_free(local, entry, 1);
237 	}
238 	if (local->cmd_queue_len) {
239 		/* This should not happen; print debug message and clear
240 		 * queue length. */
241 		printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
242 		       "flush\n", local->dev->name, local->cmd_queue_len);
243 		local->cmd_queue_len = 0;
244 	}
245 	spin_unlock_irqrestore(&local->cmdlock, flags);
246 }
247 
248 
249 /**
250  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
251  * @dev: pointer to net_device
252  * @entry: Prism2 command queue entry to be issued
253  */
254 static int hfa384x_cmd_issue(struct net_device *dev,
255 				    struct hostap_cmd_queue *entry)
256 {
257 	struct hostap_interface *iface;
258 	local_info_t *local;
259 	int tries;
260 	u16 reg;
261 	unsigned long flags;
262 
263 	iface = netdev_priv(dev);
264 	local = iface->local;
265 
266 	if (local->func->card_present && !local->func->card_present(local))
267 		return -ENODEV;
268 
269 	if (entry->issued) {
270 		printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
271 		       dev->name, entry);
272 	}
273 
274 	/* wait until busy bit is clear; this should always be clear since the
275 	 * commands are serialized */
276 	tries = HFA384X_CMD_BUSY_TIMEOUT;
277 	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
278 		tries--;
279 		udelay(1);
280 	}
281 #ifndef final_version
282 	if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
283 		prism2_io_debug_error(dev, 1);
284 		printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
285 		       "for %d usec\n", dev->name,
286 		       HFA384X_CMD_BUSY_TIMEOUT - tries);
287 	}
288 #endif
289 	if (tries == 0) {
290 		reg = HFA384X_INW(HFA384X_CMD_OFF);
291 		prism2_io_debug_error(dev, 2);
292 		printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
293 		       "reg=0x%04x\n", dev->name, reg);
294 		return -ETIMEDOUT;
295 	}
296 
297 	/* write command */
298 	spin_lock_irqsave(&local->cmdlock, flags);
299 	HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
300 	HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
301 	HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
302 	entry->issued = 1;
303 	spin_unlock_irqrestore(&local->cmdlock, flags);
304 
305 	return 0;
306 }
307 
308 
309 /**
310  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
311  * @dev: pointer to net_device
312  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
313  * @param0: value for Param0 register
314  * @param1: value for Param1 register (pointer; %NULL if not used)
315  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
316  *
317  * Issue given command (possibly after waiting in command queue) and sleep
318  * until the command is completed (or timed out or interrupted). This can be
319  * called only from user process context.
320  */
321 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
322 		       u16 *param1, u16 *resp0)
323 {
324 	struct hostap_interface *iface;
325 	local_info_t *local;
326 	int err, res, issue, issued = 0;
327 	unsigned long flags;
328 	struct hostap_cmd_queue *entry;
329 	DECLARE_WAITQUEUE(wait, current);
330 
331 	iface = netdev_priv(dev);
332 	local = iface->local;
333 
334 	if (in_interrupt()) {
335 		printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
336 		       "context\n", dev->name);
337 		return -1;
338 	}
339 
340 	if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
341 		printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
342 		       dev->name);
343 		return -1;
344 	}
345 
346 	if (signal_pending(current))
347 		return -EINTR;
348 
349 	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
350 	if (entry == NULL)
351 		return -ENOMEM;
352 
353 	refcount_set(&entry->usecnt, 1);
354 	entry->type = CMD_SLEEP;
355 	entry->cmd = cmd;
356 	entry->param0 = param0;
357 	if (param1)
358 		entry->param1 = *param1;
359 	init_waitqueue_head(&entry->compl);
360 
361 	/* prepare to wait for command completion event, but do not sleep yet
362 	 */
363 	add_wait_queue(&entry->compl, &wait);
364 	set_current_state(TASK_INTERRUPTIBLE);
365 
366 	spin_lock_irqsave(&local->cmdlock, flags);
367 	issue = list_empty(&local->cmd_queue);
368 	if (issue)
369 		entry->issuing = 1;
370 	list_add_tail(&entry->list, &local->cmd_queue);
371 	local->cmd_queue_len++;
372 	spin_unlock_irqrestore(&local->cmdlock, flags);
373 
374 	err = 0;
375 	if (!issue)
376 		goto wait_completion;
377 
378 	if (signal_pending(current))
379 		err = -EINTR;
380 
381 	if (!err) {
382 		if (hfa384x_cmd_issue(dev, entry))
383 			err = -ETIMEDOUT;
384 		else
385 			issued = 1;
386 	}
387 
388  wait_completion:
389 	if (!err && entry->type != CMD_COMPLETED) {
390 		/* sleep until command is completed or timed out */
391 		res = schedule_timeout(2 * HZ);
392 	} else
393 		res = -1;
394 
395 	if (!err && signal_pending(current))
396 		err = -EINTR;
397 
398 	if (err && issued) {
399 		/* the command was issued, so a CmdCompl event should occur
400 		 * soon; however, there's a pending signal and
401 		 * schedule_timeout() would be interrupted; wait a short period
402 		 * of time to avoid removing entry from the list before
403 		 * CmdCompl event */
404 		udelay(300);
405 	}
406 
407 	set_current_state(TASK_RUNNING);
408 	remove_wait_queue(&entry->compl, &wait);
409 
410 	/* If entry->list is still in the list, it must be removed
411 	 * first and in this case prism2_cmd_ev() does not yet have
412 	 * local reference to it, and the data can be kfree()'d
413 	 * here. If the command completion event is still generated,
414 	 * it will be assigned to next (possibly) pending command, but
415 	 * the driver will reset the card anyway due to timeout
416 	 *
417 	 * If the entry is not in the list prism2_cmd_ev() has a local
418 	 * reference to it, but keeps cmdlock as long as the data is
419 	 * needed, so the data can be kfree()'d here. */
420 
421 	/* FIX: if the entry->list is in the list, it has not been completed
422 	 * yet, so removing it here is somewhat wrong.. this could cause
423 	 * references to freed memory and next list_del() causing NULL pointer
424 	 * dereference.. it would probably be better to leave the entry in the
425 	 * list and the list should be emptied during hw reset */
426 
427 	spin_lock_irqsave(&local->cmdlock, flags);
428 	if (!list_empty(&entry->list)) {
429 		printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
430 		       "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
431 		       entry->type, res);
432 		list_del_init(&entry->list);
433 		local->cmd_queue_len--;
434 	}
435 	spin_unlock_irqrestore(&local->cmdlock, flags);
436 
437 	if (err) {
438 		printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
439 		       dev->name, err);
440 		res = err;
441 		goto done;
442 	}
443 
444 	if (entry->type != CMD_COMPLETED) {
445 		u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
446 		printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
447 		       "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
448 		       "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
449 		       res, entry, entry->type, entry->cmd, entry->param0, reg,
450 		       HFA384X_INW(HFA384X_INTEN_OFF));
451 		if (reg & HFA384X_EV_CMD) {
452 			/* Command completion event is pending, but the
453 			 * interrupt was not delivered - probably an issue
454 			 * with pcmcia-cs configuration. */
455 			printk(KERN_WARNING "%s: interrupt delivery does not "
456 			       "seem to work\n", dev->name);
457 		}
458 		prism2_io_debug_error(dev, 3);
459 		res = -ETIMEDOUT;
460 		goto done;
461 	}
462 
463 	if (resp0 != NULL)
464 		*resp0 = entry->resp0;
465 #ifndef final_version
466 	if (entry->res) {
467 		printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
468 		       "resp0=0x%04x\n",
469 		       dev->name, cmd, entry->res, entry->resp0);
470 	}
471 #endif /* final_version */
472 
473 	res = entry->res;
474  done:
475 	hostap_cmd_queue_free(local, entry, 1);
476 	return res;
477 }
478 
479 
480 /**
481  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
482  * @dev: pointer to net_device
483  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
484  * @param0: value for Param0 register
485  * @callback: command completion callback function (%NULL = no callback)
486  * @context: context data to be given to the callback function
487  *
488  * Issue given command (possibly after waiting in command queue) and use
489  * callback function to indicate command completion. This can be called both
490  * from user and interrupt context. The callback function will be called in
491  * hardware IRQ context. It can be %NULL, when no function is called when
492  * command is completed.
493  */
494 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
495 				void (*callback)(struct net_device *dev,
496 						 long context, u16 resp0,
497 						 u16 status),
498 				long context)
499 {
500 	struct hostap_interface *iface;
501 	local_info_t *local;
502 	int issue, ret;
503 	unsigned long flags;
504 	struct hostap_cmd_queue *entry;
505 
506 	iface = netdev_priv(dev);
507 	local = iface->local;
508 
509 	if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
510 		printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
511 		       dev->name);
512 		return -1;
513 	}
514 
515 	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
516 	if (entry == NULL)
517 		return -ENOMEM;
518 
519 	refcount_set(&entry->usecnt, 1);
520 	entry->type = CMD_CALLBACK;
521 	entry->cmd = cmd;
522 	entry->param0 = param0;
523 	entry->callback = callback;
524 	entry->context = context;
525 
526 	spin_lock_irqsave(&local->cmdlock, flags);
527 	issue = list_empty(&local->cmd_queue);
528 	if (issue)
529 		entry->issuing = 1;
530 	list_add_tail(&entry->list, &local->cmd_queue);
531 	local->cmd_queue_len++;
532 	spin_unlock_irqrestore(&local->cmdlock, flags);
533 
534 	if (issue && hfa384x_cmd_issue(dev, entry))
535 		ret = -ETIMEDOUT;
536 	else
537 		ret = 0;
538 
539 	hostap_cmd_queue_free(local, entry, ret);
540 
541 	return ret;
542 }
543 
544 
545 /**
546  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
547  * @dev: pointer to net_device
548  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
549  * @param0: value for Param0 register
550  * @io_debug_num: I/O debug error number
551  *
552  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
553  */
554 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
555 				 int io_debug_num)
556 {
557 	int tries;
558 	u16 reg;
559 
560 	/* wait until busy bit is clear; this should always be clear since the
561 	 * commands are serialized */
562 	tries = HFA384X_CMD_BUSY_TIMEOUT;
563 	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
564 		tries--;
565 		udelay(1);
566 	}
567 	if (tries == 0) {
568 		reg = HFA384X_INW(HFA384X_CMD_OFF);
569 		prism2_io_debug_error(dev, io_debug_num);
570 		printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
571 		       "reg=0x%04x\n", dev->name, io_debug_num, reg);
572 		return -ETIMEDOUT;
573 	}
574 
575 	/* write command */
576 	HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
577 	HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
578 
579 	return 0;
580 }
581 
582 
583 /**
584  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
585  * @dev: pointer to net_device
586  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
587  * @param0: value for Param0 register
588  */
589 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
590 {
591 	int res, tries;
592 	u16 reg;
593 
594 	res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
595 	if (res)
596 		return res;
597 
598         /* wait for command completion */
599 	if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
600 		tries = HFA384X_DL_COMPL_TIMEOUT;
601 	else
602 		tries = HFA384X_CMD_COMPL_TIMEOUT;
603 
604         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
605                tries > 0) {
606                 tries--;
607                 udelay(10);
608         }
609         if (tries == 0) {
610                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
611 		prism2_io_debug_error(dev, 5);
612                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
613 		       "reg=0x%04x\n", dev->name, reg);
614                 return -ETIMEDOUT;
615         }
616 
617         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
618                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
619                 BIT(8))) >> 8;
620 #ifndef final_version
621 	if (res) {
622 		printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
623 		       dev->name, cmd, res);
624 	}
625 #endif
626 
627 	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
628 
629 	return res;
630 }
631 
632 
633 /**
634  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
635  * @dev: pointer to net_device
636  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
637  * @param0: value for Param0 register
638  */
639 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
640 				      u16 param0)
641 {
642 	return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
643 }
644 
645 
646 /**
647  * prism2_cmd_ev - Prism2 command completion event handler
648  * @dev: pointer to net_device
649  *
650  * Interrupt handler for command completion events. Called by the main
651  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
652  * from the hardware and ACK the event. Depending on the issued command type
653  * either wake up the sleeping process that is waiting for command completion
654  * or call the callback function. Issue the next command, if one is pending.
655  */
656 static void prism2_cmd_ev(struct net_device *dev)
657 {
658 	struct hostap_interface *iface;
659 	local_info_t *local;
660 	struct hostap_cmd_queue *entry = NULL;
661 
662 	iface = netdev_priv(dev);
663 	local = iface->local;
664 
665 	spin_lock(&local->cmdlock);
666 	if (!list_empty(&local->cmd_queue)) {
667 		entry = list_entry(local->cmd_queue.next,
668 				   struct hostap_cmd_queue, list);
669 		refcount_inc(&entry->usecnt);
670 		list_del_init(&entry->list);
671 		local->cmd_queue_len--;
672 
673 		if (!entry->issued) {
674 			printk(KERN_DEBUG "%s: Command completion event, but "
675 			       "cmd not issued\n", dev->name);
676 			__hostap_cmd_queue_free(local, entry, 1);
677 			entry = NULL;
678 		}
679 	}
680 	spin_unlock(&local->cmdlock);
681 
682 	if (!entry) {
683 		HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
684 		printk(KERN_DEBUG "%s: Command completion event, but no "
685 		       "pending commands\n", dev->name);
686 		return;
687 	}
688 
689 	entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
690 	entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
691 		      (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
692 		       BIT(9) | BIT(8))) >> 8;
693 	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
694 
695 	/* TODO: rest of the CmdEv handling could be moved to tasklet */
696 	if (entry->type == CMD_SLEEP) {
697 		entry->type = CMD_COMPLETED;
698 		wake_up_interruptible(&entry->compl);
699 	} else if (entry->type == CMD_CALLBACK) {
700 		if (entry->callback)
701 			entry->callback(dev, entry->context, entry->resp0,
702 					entry->res);
703 	} else {
704 		printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
705 		       dev->name, entry->type);
706 	}
707 	hostap_cmd_queue_free(local, entry, 1);
708 
709 	/* issue next command, if pending */
710 	entry = NULL;
711 	spin_lock(&local->cmdlock);
712 	if (!list_empty(&local->cmd_queue)) {
713 		entry = list_entry(local->cmd_queue.next,
714 				   struct hostap_cmd_queue, list);
715 		if (entry->issuing) {
716 			/* hfa384x_cmd() has already started issuing this
717 			 * command, so do not start here */
718 			entry = NULL;
719 		}
720 		if (entry)
721 			refcount_inc(&entry->usecnt);
722 	}
723 	spin_unlock(&local->cmdlock);
724 
725 	if (entry) {
726 		/* issue next command; if command issuing fails, remove the
727 		 * entry from cmd_queue */
728 		int res = hfa384x_cmd_issue(dev, entry);
729 		spin_lock(&local->cmdlock);
730 		__hostap_cmd_queue_free(local, entry, res);
731 		spin_unlock(&local->cmdlock);
732 	}
733 }
734 
735 
736 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
737 {
738 	int tries = HFA384X_BAP_BUSY_TIMEOUT;
739 	int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
740 
741 	while (res && tries > 0) {
742 		tries--;
743 		udelay(1);
744 		res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
745 	}
746 	return res;
747 }
748 
749 
750 /* Offset must be even */
751 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
752 			     int offset)
753 {
754 	u16 o_off, s_off;
755 	int ret = 0;
756 
757 	if (offset % 2 || bap > 1)
758 		return -EINVAL;
759 
760 	if (bap == BAP1) {
761 		o_off = HFA384X_OFFSET1_OFF;
762 		s_off = HFA384X_SELECT1_OFF;
763 	} else {
764 		o_off = HFA384X_OFFSET0_OFF;
765 		s_off = HFA384X_SELECT0_OFF;
766 	}
767 
768 	if (hfa384x_wait_offset(dev, o_off)) {
769 		prism2_io_debug_error(dev, 7);
770 		printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
771 		       dev->name);
772 		ret = -ETIMEDOUT;
773 		goto out;
774 	}
775 
776 	HFA384X_OUTW(id, s_off);
777 	HFA384X_OUTW(offset, o_off);
778 
779 	if (hfa384x_wait_offset(dev, o_off)) {
780 		prism2_io_debug_error(dev, 8);
781 		printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
782 		       dev->name);
783 		ret = -ETIMEDOUT;
784 		goto out;
785 	}
786 #ifndef final_version
787 	if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
788 		prism2_io_debug_error(dev, 9);
789 		printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
790 		       "(%d,0x04%x,%d); reg=0x%04x\n",
791 		       dev->name, bap, id, offset, HFA384X_INW(o_off));
792 		ret = -EINVAL;
793 	}
794 #endif
795 
796  out:
797 	return ret;
798 }
799 
800 
801 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
802 			   int exact_len)
803 {
804 	struct hostap_interface *iface;
805 	local_info_t *local;
806 	int res, rlen = 0;
807 	struct hfa384x_rid_hdr rec;
808 
809 	iface = netdev_priv(dev);
810 	local = iface->local;
811 
812 	if (local->no_pri) {
813 		printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
814 		       "f/w\n", dev->name, rid, len);
815 		return -ENOTTY; /* Well.. not really correct, but return
816 				 * something unique enough.. */
817 	}
818 
819 	if ((local->func->card_present && !local->func->card_present(local)) ||
820 	    local->hw_downloading)
821 		return -ENODEV;
822 
823 	res = mutex_lock_interruptible(&local->rid_bap_mtx);
824 	if (res)
825 		return res;
826 
827 	res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
828 	if (res) {
829 		printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
830 		       "(res=%d, rid=%04x, len=%d)\n",
831 		       dev->name, res, rid, len);
832 		mutex_unlock(&local->rid_bap_mtx);
833 		return res;
834 	}
835 
836 	spin_lock_bh(&local->baplock);
837 
838 	res = hfa384x_setup_bap(dev, BAP0, rid, 0);
839 	if (res)
840 		goto unlock;
841 
842 	res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
843 	if (res)
844 		goto unlock;
845 
846 	if (le16_to_cpu(rec.len) == 0) {
847 		/* RID not available */
848 		res = -ENODATA;
849 		goto unlock;
850 	}
851 
852 	rlen = (le16_to_cpu(rec.len) - 1) * 2;
853 	if (exact_len && rlen != len) {
854 		printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
855 		       "rid=0x%04x, len=%d (expected %d)\n",
856 		       dev->name, rid, rlen, len);
857 		res = -ENODATA;
858 	}
859 
860 	res = hfa384x_from_bap(dev, BAP0, buf, len);
861 
862 unlock:
863 	spin_unlock_bh(&local->baplock);
864 	mutex_unlock(&local->rid_bap_mtx);
865 
866 	if (res) {
867 		if (res != -ENODATA)
868 			printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
869 			       "len=%d) - failed - res=%d\n", dev->name, rid,
870 			       len, res);
871 		if (res == -ETIMEDOUT)
872 			prism2_hw_reset(dev);
873 		return res;
874 	}
875 
876 	return rlen;
877 }
878 
879 
880 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
881 {
882 	struct hostap_interface *iface;
883 	local_info_t *local;
884 	struct hfa384x_rid_hdr rec;
885 	int res;
886 
887 	iface = netdev_priv(dev);
888 	local = iface->local;
889 
890 	if (local->no_pri) {
891 		printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
892 		       "f/w\n", dev->name, rid, len);
893 		return -ENOTTY; /* Well.. not really correct, but return
894 				 * something unique enough.. */
895 	}
896 
897 	if ((local->func->card_present && !local->func->card_present(local)) ||
898 	    local->hw_downloading)
899 		return -ENODEV;
900 
901 	rec.rid = cpu_to_le16(rid);
902 	/* RID len in words and +1 for rec.rid */
903 	rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
904 
905 	res = mutex_lock_interruptible(&local->rid_bap_mtx);
906 	if (res)
907 		return res;
908 
909 	spin_lock_bh(&local->baplock);
910 	res = hfa384x_setup_bap(dev, BAP0, rid, 0);
911 	if (!res)
912 		res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
913 	if (!res)
914 		res = hfa384x_to_bap(dev, BAP0, buf, len);
915 	spin_unlock_bh(&local->baplock);
916 
917 	if (res) {
918 		printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
919 		       "failed - res=%d\n", dev->name, rid, len, res);
920 		mutex_unlock(&local->rid_bap_mtx);
921 		return res;
922 	}
923 
924 	res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
925 	mutex_unlock(&local->rid_bap_mtx);
926 
927 	if (res) {
928 		printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
929 		       "failed (res=%d, rid=%04x, len=%d)\n",
930 		       dev->name, res, rid, len);
931 
932 		if (res == -ETIMEDOUT)
933 			prism2_hw_reset(dev);
934 	}
935 
936 	return res;
937 }
938 
939 
940 static void hfa384x_disable_interrupts(struct net_device *dev)
941 {
942 	/* disable interrupts and clear event status */
943 	HFA384X_OUTW(0, HFA384X_INTEN_OFF);
944 	HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
945 }
946 
947 
948 static void hfa384x_enable_interrupts(struct net_device *dev)
949 {
950 	/* ack pending events and enable interrupts from selected events */
951 	HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
952 	HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
953 }
954 
955 
956 static void hfa384x_events_no_bap0(struct net_device *dev)
957 {
958 	HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
959 		     HFA384X_INTEN_OFF);
960 }
961 
962 
963 static void hfa384x_events_all(struct net_device *dev)
964 {
965 	HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
966 }
967 
968 
969 static void hfa384x_events_only_cmd(struct net_device *dev)
970 {
971 	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
972 }
973 
974 
975 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
976 {
977 	u16 fid;
978 	unsigned long delay;
979 
980 	/* FIX: this could be replace with hfa384x_cmd() if the Alloc event
981 	 * below would be handled like CmdCompl event (sleep here, wake up from
982 	 * interrupt handler */
983 	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
984 		printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
985 		       dev->name, len);
986 		return 0xffff;
987 	}
988 
989 	delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
990 	while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
991 	       time_before(jiffies, delay))
992 		yield();
993 	if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
994 		printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
995 		return 0xffff;
996 	}
997 
998 	fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
999 	HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1000 
1001 	return fid;
1002 }
1003 
1004 
1005 static int prism2_reset_port(struct net_device *dev)
1006 {
1007 	struct hostap_interface *iface;
1008 	local_info_t *local;
1009 	int res;
1010 
1011 	iface = netdev_priv(dev);
1012 	local = iface->local;
1013 
1014 	if (!local->dev_enabled)
1015 		return 0;
1016 
1017 	res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1018 			  NULL, NULL);
1019 	if (res)
1020 		printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1021 		       dev->name);
1022 	else {
1023 		res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1024 				  NULL, NULL);
1025 		if (res)
1026 			printk(KERN_DEBUG "%s: reset port failed to enable "
1027 			       "port\n", dev->name);
1028 	}
1029 
1030 	/* It looks like at least some STA firmware versions reset
1031 	 * fragmentation threshold back to 2346 after enable command. Restore
1032 	 * the configured value, if it differs from this default. */
1033 	if (local->fragm_threshold != 2346 &&
1034 	    hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1035 			    local->fragm_threshold)) {
1036 		printk(KERN_DEBUG "%s: failed to restore fragmentation "
1037 		       "threshold (%d) after Port0 enable\n",
1038 		       dev->name, local->fragm_threshold);
1039 	}
1040 
1041 	/* Some firmwares lose antenna selection settings on reset */
1042 	(void) hostap_set_antsel(local);
1043 
1044 	return res;
1045 }
1046 
1047 
1048 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1049 				   const char *txt)
1050 {
1051 	struct hfa384x_comp_ident comp;
1052 	struct hostap_interface *iface;
1053 	local_info_t *local;
1054 
1055 	iface = netdev_priv(dev);
1056 	local = iface->local;
1057 
1058 	if (local->no_pri) {
1059 		/* PRI f/w not yet available - cannot read RIDs */
1060 		return -1;
1061 	}
1062 	if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1063 		printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1064 		return -1;
1065 	}
1066 
1067 	printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1068 	       __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1069 	       __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1070 	return 0;
1071 }
1072 
1073 
1074 static int prism2_setup_rids(struct net_device *dev)
1075 {
1076 	struct hostap_interface *iface;
1077 	local_info_t *local;
1078 	__le16 tmp;
1079 	int ret = 0;
1080 
1081 	iface = netdev_priv(dev);
1082 	local = iface->local;
1083 
1084 	hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1085 
1086 	if (!local->fw_ap) {
1087 		u16 tmp1 = hostap_get_porttype(local);
1088 		ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1089 		if (ret) {
1090 			printk("%s: Port type setting to %d failed\n",
1091 			       dev->name, tmp1);
1092 			goto fail;
1093 		}
1094 	}
1095 
1096 	/* Setting SSID to empty string seems to kill the card in Host AP mode
1097 	 */
1098 	if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1099 		ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1100 					local->essid);
1101 		if (ret) {
1102 			printk("%s: AP own SSID setting failed\n", dev->name);
1103 			goto fail;
1104 		}
1105 	}
1106 
1107 	ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1108 			      PRISM2_DATA_MAXLEN);
1109 	if (ret) {
1110 		printk("%s: MAC data length setting to %d failed\n",
1111 		       dev->name, PRISM2_DATA_MAXLEN);
1112 		goto fail;
1113 	}
1114 
1115 	if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1116 		printk("%s: Channel list read failed\n", dev->name);
1117 		ret = -EINVAL;
1118 		goto fail;
1119 	}
1120 	local->channel_mask = le16_to_cpu(tmp);
1121 
1122 	if (local->channel < 1 || local->channel > 14 ||
1123 	    !(local->channel_mask & (1 << (local->channel - 1)))) {
1124 		printk(KERN_WARNING "%s: Channel setting out of range "
1125 		       "(%d)!\n", dev->name, local->channel);
1126 		ret = -EBUSY;
1127 		goto fail;
1128 	}
1129 
1130 	ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1131 	if (ret) {
1132 		printk("%s: Channel setting to %d failed\n",
1133 		       dev->name, local->channel);
1134 		goto fail;
1135 	}
1136 
1137 	ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1138 			      local->beacon_int);
1139 	if (ret) {
1140 		printk("%s: Beacon interval setting to %d failed\n",
1141 		       dev->name, local->beacon_int);
1142 		/* this may fail with Symbol/Lucent firmware */
1143 		if (ret == -ETIMEDOUT)
1144 			goto fail;
1145 	}
1146 
1147 	ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1148 			      local->dtim_period);
1149 	if (ret) {
1150 		printk("%s: DTIM period setting to %d failed\n",
1151 		       dev->name, local->dtim_period);
1152 		/* this may fail with Symbol/Lucent firmware */
1153 		if (ret == -ETIMEDOUT)
1154 			goto fail;
1155 	}
1156 
1157 	ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1158 			      local->is_promisc);
1159 	if (ret)
1160 		printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1161 		       dev->name, local->is_promisc);
1162 
1163 	if (!local->fw_ap) {
1164 		ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1165 					local->essid);
1166 		if (ret) {
1167 			printk("%s: Desired SSID setting failed\n", dev->name);
1168 			goto fail;
1169 		}
1170 	}
1171 
1172 	/* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1173 	 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1174 	 * rates */
1175 	if (local->tx_rate_control == 0) {
1176 		local->tx_rate_control =
1177 			HFA384X_RATES_1MBPS |
1178 			HFA384X_RATES_2MBPS |
1179 			HFA384X_RATES_5MBPS |
1180 			HFA384X_RATES_11MBPS;
1181 	}
1182 	if (local->basic_rates == 0)
1183 		local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1184 
1185 	if (!local->fw_ap) {
1186 		ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1187 				      local->tx_rate_control);
1188 		if (ret) {
1189 			printk("%s: TXRateControl setting to %d failed\n",
1190 			       dev->name, local->tx_rate_control);
1191 			goto fail;
1192 		}
1193 
1194 		ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1195 				      local->tx_rate_control);
1196 		if (ret) {
1197 			printk("%s: cnfSupportedRates setting to %d failed\n",
1198 			       dev->name, local->tx_rate_control);
1199 		}
1200 
1201 		ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1202 				      local->basic_rates);
1203 		if (ret) {
1204 			printk("%s: cnfBasicRates setting to %d failed\n",
1205 			       dev->name, local->basic_rates);
1206 		}
1207 
1208 		ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1209 		if (ret) {
1210 			printk("%s: Create IBSS setting to 1 failed\n",
1211 			       dev->name);
1212 		}
1213 	}
1214 
1215 	if (local->name_set)
1216 		(void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1217 					 local->name);
1218 
1219 	if (hostap_set_encryption(local)) {
1220 		printk(KERN_INFO "%s: could not configure encryption\n",
1221 		       dev->name);
1222 	}
1223 
1224 	(void) hostap_set_antsel(local);
1225 
1226 	if (hostap_set_roaming(local)) {
1227 		printk(KERN_INFO "%s: could not set host roaming\n",
1228 		       dev->name);
1229 	}
1230 
1231 	if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1232 	    hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1233 		printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1234 		       dev->name, local->enh_sec);
1235 
1236 	/* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1237 	 * not working correctly (last seven counters report bogus values).
1238 	 * This has been fixed in 0.8.2, so enable 32-bit tallies only
1239 	 * beginning with that firmware version. Another bug fix for 32-bit
1240 	 * tallies in 1.4.0; should 16-bit tallies be used for some other
1241 	 * versions, too? */
1242 	if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1243 		if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1244 			printk(KERN_INFO "%s: cnfThirty2Tally setting "
1245 			       "failed\n", dev->name);
1246 			local->tallies32 = 0;
1247 		} else
1248 			local->tallies32 = 1;
1249 	} else
1250 		local->tallies32 = 0;
1251 
1252 	hostap_set_auth_algs(local);
1253 
1254 	if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1255 			    local->fragm_threshold)) {
1256 		printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1257 		       "failed\n", dev->name, local->fragm_threshold);
1258 	}
1259 
1260 	if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1261 			    local->rts_threshold)) {
1262 		printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1263 		       dev->name, local->rts_threshold);
1264 	}
1265 
1266 	if (local->manual_retry_count >= 0 &&
1267 	    hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1268 			    local->manual_retry_count)) {
1269 		printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1270 		       dev->name, local->manual_retry_count);
1271 	}
1272 
1273 	if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1274 	    hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1275 		local->rssi_to_dBm = le16_to_cpu(tmp);
1276 	}
1277 
1278 	if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1279 	    hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1280 		printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1281 		       dev->name);
1282 	}
1283 
1284 	if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1285 	    hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1286 			    local->generic_elem, local->generic_elem_len)) {
1287 		printk(KERN_INFO "%s: setting genericElement failed\n",
1288 		       dev->name);
1289 	}
1290 
1291  fail:
1292 	return ret;
1293 }
1294 
1295 
1296 static int prism2_hw_init(struct net_device *dev, int initial)
1297 {
1298 	struct hostap_interface *iface;
1299 	local_info_t *local;
1300 	int ret, first = 1;
1301 	unsigned long start, delay;
1302 
1303 	PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1304 
1305 	iface = netdev_priv(dev);
1306 	local = iface->local;
1307 
1308 	clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1309 
1310  init:
1311 	/* initialize HFA 384x */
1312 	ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1313 	if (ret) {
1314 		printk(KERN_INFO "%s: first command failed - assuming card "
1315 		       "does not have primary firmware\n", dev_info);
1316 	}
1317 
1318 	if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1319 		/* EvStat has Cmd bit set in some cases, so retry once if no
1320 		 * wait was needed */
1321 		HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1322 		printk(KERN_DEBUG "%s: init command completed too quickly - "
1323 		       "retrying\n", dev->name);
1324 		first = 0;
1325 		goto init;
1326 	}
1327 
1328 	start = jiffies;
1329 	delay = jiffies + HFA384X_INIT_TIMEOUT;
1330 	while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1331 	       time_before(jiffies, delay))
1332 		yield();
1333 	if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1334 		printk(KERN_DEBUG "%s: assuming no Primary image in "
1335 		       "flash - card initialization not completed\n",
1336 		       dev_info);
1337 		local->no_pri = 1;
1338 #ifdef PRISM2_DOWNLOAD_SUPPORT
1339 			if (local->sram_type == -1)
1340 				local->sram_type = prism2_get_ram_size(local);
1341 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1342 		return 1;
1343 	}
1344 	local->no_pri = 0;
1345 	printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1346 	       (jiffies - start) * 1000 / HZ);
1347 	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1348 	return 0;
1349 }
1350 
1351 
1352 static int prism2_hw_init2(struct net_device *dev, int initial)
1353 {
1354 	struct hostap_interface *iface;
1355 	local_info_t *local;
1356 	int i;
1357 
1358 	iface = netdev_priv(dev);
1359 	local = iface->local;
1360 
1361 #ifdef PRISM2_DOWNLOAD_SUPPORT
1362 	kfree(local->pda);
1363 	if (local->no_pri)
1364 		local->pda = NULL;
1365 	else
1366 		local->pda = prism2_read_pda(dev);
1367 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1368 
1369 	hfa384x_disable_interrupts(dev);
1370 
1371 #ifndef final_version
1372 	HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1373 	if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1374 		printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1375 		       HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1376 		goto failed;
1377 	}
1378 #endif
1379 
1380 	if (initial || local->pri_only) {
1381 		hfa384x_events_only_cmd(dev);
1382 		/* get card version information */
1383 		if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1384 		    prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1385 			hfa384x_disable_interrupts(dev);
1386 			goto failed;
1387 		}
1388 
1389 		if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1390 			printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1391 			       "- only Primary f/w present\n", dev->name);
1392 			local->pri_only = 1;
1393 			return 0;
1394 		}
1395 		local->pri_only = 0;
1396 		hfa384x_disable_interrupts(dev);
1397 	}
1398 
1399 	/* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1400 	 * enable interrupts before this. This would also require some sort of
1401 	 * sleeping AllocEv waiting */
1402 
1403 	/* allocate TX FIDs */
1404 	local->txfid_len = PRISM2_TXFID_LEN;
1405 	for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1406 		local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1407 		if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1408 			local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1409 			if (local->txfid[i] != 0xffff) {
1410 				printk(KERN_DEBUG "%s: Using shorter TX FID "
1411 				       "(1600 bytes)\n", dev->name);
1412 				local->txfid_len = 1600;
1413 			}
1414 		}
1415 		if (local->txfid[i] == 0xffff)
1416 			goto failed;
1417 		local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1418 	}
1419 
1420 	hfa384x_events_only_cmd(dev);
1421 
1422 	if (initial) {
1423 		struct list_head *ptr;
1424 		prism2_check_sta_fw_version(local);
1425 
1426 		if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1427 				    dev->dev_addr, 6, 1) < 0) {
1428 			printk("%s: could not get own MAC address\n",
1429 			       dev->name);
1430 		}
1431 		list_for_each(ptr, &local->hostap_interfaces) {
1432 			iface = list_entry(ptr, struct hostap_interface, list);
1433 			eth_hw_addr_inherit(iface->dev, dev);
1434 		}
1435 	} else if (local->fw_ap)
1436 		prism2_check_sta_fw_version(local);
1437 
1438 	prism2_setup_rids(dev);
1439 
1440 	/* MAC is now configured, but port 0 is not yet enabled */
1441 	return 0;
1442 
1443  failed:
1444 	if (!local->no_pri)
1445 		printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1446 	return 1;
1447 }
1448 
1449 
1450 static int prism2_hw_enable(struct net_device *dev, int initial)
1451 {
1452 	struct hostap_interface *iface;
1453 	local_info_t *local;
1454 	int was_resetting;
1455 
1456 	iface = netdev_priv(dev);
1457 	local = iface->local;
1458 	was_resetting = local->hw_resetting;
1459 
1460 	if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1461 		printk("%s: MAC port 0 enabling failed\n", dev->name);
1462 		return 1;
1463 	}
1464 
1465 	local->hw_ready = 1;
1466 	local->hw_reset_tries = 0;
1467 	local->hw_resetting = 0;
1468 	hfa384x_enable_interrupts(dev);
1469 
1470 	/* at least D-Link DWL-650 seems to require additional port reset
1471 	 * before it starts acting as an AP, so reset port automatically
1472 	 * here just in case */
1473 	if (initial && prism2_reset_port(dev)) {
1474 		printk("%s: MAC port 0 resetting failed\n", dev->name);
1475 		return 1;
1476 	}
1477 
1478 	if (was_resetting && netif_queue_stopped(dev)) {
1479 		/* If hw_reset() was called during pending transmit, netif
1480 		 * queue was stopped. Wake it up now since the wlan card has
1481 		 * been resetted. */
1482 		netif_wake_queue(dev);
1483 	}
1484 
1485 	return 0;
1486 }
1487 
1488 
1489 static int prism2_hw_config(struct net_device *dev, int initial)
1490 {
1491 	struct hostap_interface *iface;
1492 	local_info_t *local;
1493 
1494 	iface = netdev_priv(dev);
1495 	local = iface->local;
1496 
1497 	if (local->hw_downloading)
1498 		return 1;
1499 
1500 	if (prism2_hw_init(dev, initial)) {
1501 		return local->no_pri ? 0 : 1;
1502 	}
1503 
1504 	if (prism2_hw_init2(dev, initial))
1505 		return 1;
1506 
1507 	/* Enable firmware if secondary image is loaded and at least one of the
1508 	 * netdevices is up. */
1509 	if (!local->pri_only &&
1510 	    (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1511 		if (!local->dev_enabled)
1512 			prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1513 		local->dev_enabled = 1;
1514 		return prism2_hw_enable(dev, initial);
1515 	}
1516 
1517 	return 0;
1518 }
1519 
1520 
1521 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1522 {
1523 	struct hostap_interface *iface;
1524 	local_info_t *local;
1525 
1526 	iface = netdev_priv(dev);
1527 	local = iface->local;
1528 
1529 	/* Allow only command completion events during disable */
1530 	hfa384x_events_only_cmd(dev);
1531 
1532 	local->hw_ready = 0;
1533 	if (local->dev_enabled)
1534 		prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1535 	local->dev_enabled = 0;
1536 
1537 	if (local->func->card_present && !local->func->card_present(local)) {
1538 		printk(KERN_DEBUG "%s: card already removed or not configured "
1539 		       "during shutdown\n", dev->name);
1540 		return;
1541 	}
1542 
1543 	if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1544 	    hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1545 		printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1546 
1547 	hfa384x_disable_interrupts(dev);
1548 
1549 	if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1550 		hfa384x_events_only_cmd(dev);
1551 	else
1552 		prism2_clear_cmd_queue(local);
1553 }
1554 
1555 
1556 static void prism2_hw_reset(struct net_device *dev)
1557 {
1558 	struct hostap_interface *iface;
1559 	local_info_t *local;
1560 
1561 #if 0
1562 	static long last_reset = 0;
1563 
1564 	/* do not reset card more than once per second to avoid ending up in a
1565 	 * busy loop resetting the card */
1566 	if (time_before_eq(jiffies, last_reset + HZ))
1567 		return;
1568 	last_reset = jiffies;
1569 #endif
1570 
1571 	iface = netdev_priv(dev);
1572 	local = iface->local;
1573 
1574 	if (in_interrupt()) {
1575 		printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1576 		       "in interrupt context\n", dev->name);
1577 		return;
1578 	}
1579 
1580 	if (local->hw_downloading)
1581 		return;
1582 
1583 	if (local->hw_resetting) {
1584 		printk(KERN_WARNING "%s: %s: already resetting card - "
1585 		       "ignoring reset request\n", dev_info, dev->name);
1586 		return;
1587 	}
1588 
1589 	local->hw_reset_tries++;
1590 	if (local->hw_reset_tries > 10) {
1591 		printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1592 		       dev->name);
1593 		return;
1594 	}
1595 
1596 	printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1597 	hfa384x_disable_interrupts(dev);
1598 	local->hw_resetting = 1;
1599 	if (local->func->cor_sreset) {
1600 		/* Host system seems to hang in some cases with high traffic
1601 		 * load or shared interrupts during COR sreset. Disable shared
1602 		 * interrupts during reset to avoid these crashes. COS sreset
1603 		 * takes quite a long time, so it is unfortunate that this
1604 		 * seems to be needed. Anyway, I do not know of any better way
1605 		 * of avoiding the crash. */
1606 		disable_irq(dev->irq);
1607 		local->func->cor_sreset(local);
1608 		enable_irq(dev->irq);
1609 	}
1610 	prism2_hw_shutdown(dev, 1);
1611 	prism2_hw_config(dev, 0);
1612 	local->hw_resetting = 0;
1613 
1614 #ifdef PRISM2_DOWNLOAD_SUPPORT
1615 	if (local->dl_pri) {
1616 		printk(KERN_DEBUG "%s: persistent download of primary "
1617 		       "firmware\n", dev->name);
1618 		if (prism2_download_genesis(local, local->dl_pri) < 0)
1619 			printk(KERN_WARNING "%s: download (PRI) failed\n",
1620 			       dev->name);
1621 	}
1622 
1623 	if (local->dl_sec) {
1624 		printk(KERN_DEBUG "%s: persistent download of secondary "
1625 		       "firmware\n", dev->name);
1626 		if (prism2_download_volatile(local, local->dl_sec) < 0)
1627 			printk(KERN_WARNING "%s: download (SEC) failed\n",
1628 			       dev->name);
1629 	}
1630 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1631 
1632 	/* TODO: restore beacon TIM bits for STAs that have buffered frames */
1633 }
1634 
1635 
1636 static void prism2_schedule_reset(local_info_t *local)
1637 {
1638 	schedule_work(&local->reset_queue);
1639 }
1640 
1641 
1642 /* Called only as scheduled task after noticing card timeout in interrupt
1643  * context */
1644 static void handle_reset_queue(struct work_struct *work)
1645 {
1646 	local_info_t *local = container_of(work, local_info_t, reset_queue);
1647 
1648 	printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1649 	prism2_hw_reset(local->dev);
1650 
1651 	if (netif_queue_stopped(local->dev)) {
1652 		int i;
1653 
1654 		for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1655 			if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1656 				PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1657 				       "wake up queue\n");
1658 				netif_wake_queue(local->dev);
1659 				break;
1660 			}
1661 	}
1662 }
1663 
1664 
1665 static int prism2_get_txfid_idx(local_info_t *local)
1666 {
1667 	int idx, end;
1668 	unsigned long flags;
1669 
1670 	spin_lock_irqsave(&local->txfidlock, flags);
1671 	end = idx = local->next_txfid;
1672 	do {
1673 		if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1674 			local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1675 			spin_unlock_irqrestore(&local->txfidlock, flags);
1676 			return idx;
1677 		}
1678 		idx++;
1679 		if (idx >= PRISM2_TXFID_COUNT)
1680 			idx = 0;
1681 	} while (idx != end);
1682 	spin_unlock_irqrestore(&local->txfidlock, flags);
1683 
1684 	PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1685 	       "packet dropped\n");
1686 	local->dev->stats.tx_dropped++;
1687 
1688 	return -1;
1689 }
1690 
1691 
1692 /* Called only from hardware IRQ */
1693 static void prism2_transmit_cb(struct net_device *dev, long context,
1694 			       u16 resp0, u16 res)
1695 {
1696 	struct hostap_interface *iface;
1697 	local_info_t *local;
1698 	int idx = (int) context;
1699 
1700 	iface = netdev_priv(dev);
1701 	local = iface->local;
1702 
1703 	if (res) {
1704 		printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1705 		       dev->name, res);
1706 		return;
1707 	}
1708 
1709 	if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1710 		printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1711 		       "idx=%d\n", dev->name, idx);
1712 		return;
1713 	}
1714 
1715 	if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1716 		printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1717 		       "with no pending transmit\n", dev->name);
1718 	}
1719 
1720 	if (netif_queue_stopped(dev)) {
1721 		/* ready for next TX, so wake up queue that was stopped in
1722 		 * prism2_transmit() */
1723 		netif_wake_queue(dev);
1724 	}
1725 
1726 	spin_lock(&local->txfidlock);
1727 
1728 	/* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1729 	 * will be automatically allocated for the next TX frame */
1730 	local->intransmitfid[idx] = resp0;
1731 
1732 	PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1733 	       "resp0=0x%04x, transmit_txfid=0x%04x\n",
1734 	       dev->name, idx, local->txfid[idx],
1735 	       resp0, local->intransmitfid[local->next_txfid]);
1736 
1737 	idx++;
1738 	if (idx >= PRISM2_TXFID_COUNT)
1739 		idx = 0;
1740 	local->next_txfid = idx;
1741 
1742 	/* check if all TX buffers are occupied */
1743 	do {
1744 		if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1745 			spin_unlock(&local->txfidlock);
1746 			return;
1747 		}
1748 		idx++;
1749 		if (idx >= PRISM2_TXFID_COUNT)
1750 			idx = 0;
1751 	} while (idx != local->next_txfid);
1752 	spin_unlock(&local->txfidlock);
1753 
1754 	/* no empty TX buffers, stop queue */
1755 	netif_stop_queue(dev);
1756 }
1757 
1758 
1759 /* Called only from software IRQ if PCI bus master is not used (with bus master
1760  * this can be called both from software and hardware IRQ) */
1761 static int prism2_transmit(struct net_device *dev, int idx)
1762 {
1763 	struct hostap_interface *iface;
1764 	local_info_t *local;
1765 	int res;
1766 
1767 	iface = netdev_priv(dev);
1768 	local = iface->local;
1769 
1770 	/* The driver tries to stop netif queue so that there would not be
1771 	 * more than one attempt to transmit frames going on; check that this
1772 	 * is really the case */
1773 
1774 	if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1775 		printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1776 		       "when previous TX was pending\n", dev->name);
1777 		return -1;
1778 	}
1779 
1780 	/* stop the queue for the time that transmit is pending */
1781 	netif_stop_queue(dev);
1782 
1783 	/* transmit packet */
1784 	res = hfa384x_cmd_callback(
1785 		dev,
1786 		HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1787 		local->txfid[idx],
1788 		prism2_transmit_cb, (long) idx);
1789 
1790 	if (res) {
1791 		printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1792 		       "failed (res=%d)\n", dev->name, res);
1793 		dev->stats.tx_dropped++;
1794 		netif_wake_queue(dev);
1795 		return -1;
1796 	}
1797 	netif_trans_update(dev);
1798 
1799 	/* Since we did not wait for command completion, the card continues
1800 	 * to process on the background and we will finish handling when
1801 	 * command completion event is handled (prism2_cmd_ev() function) */
1802 
1803 	return 0;
1804 }
1805 
1806 
1807 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1808  * send the payload with this descriptor) */
1809 /* Called only from software IRQ */
1810 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1811 {
1812 	struct hostap_interface *iface;
1813 	local_info_t *local;
1814 	struct hfa384x_tx_frame txdesc;
1815 	struct hostap_skb_tx_data *meta;
1816 	int hdr_len, data_len, idx, res, ret = -1;
1817 	u16 tx_control, fc;
1818 
1819 	iface = netdev_priv(dev);
1820 	local = iface->local;
1821 
1822 	meta = (struct hostap_skb_tx_data *) skb->cb;
1823 
1824 	prism2_callback(local, PRISM2_CALLBACK_TX_START);
1825 
1826 	if ((local->func->card_present && !local->func->card_present(local)) ||
1827 	    !local->hw_ready || local->hw_downloading || local->pri_only) {
1828 		if (net_ratelimit()) {
1829 			printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1830 			       " skipping\n", dev->name);
1831 		}
1832 		goto fail;
1833 	}
1834 
1835 	memset(&txdesc, 0, sizeof(txdesc));
1836 
1837 	/* skb->data starts with txdesc->frame_control */
1838 	hdr_len = 24;
1839 	skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1840  	fc = le16_to_cpu(txdesc.frame_control);
1841 	if (ieee80211_is_data(txdesc.frame_control) &&
1842 	    ieee80211_has_a4(txdesc.frame_control) &&
1843 	    skb->len >= 30) {
1844 		/* Addr4 */
1845 		skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1846 						 ETH_ALEN);
1847 		hdr_len += ETH_ALEN;
1848 	}
1849 
1850 	tx_control = local->tx_control;
1851 	if (meta->tx_cb_idx) {
1852 		tx_control |= HFA384X_TX_CTRL_TX_OK;
1853 		txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1854 	}
1855 	txdesc.tx_control = cpu_to_le16(tx_control);
1856 	txdesc.tx_rate = meta->rate;
1857 
1858 	data_len = skb->len - hdr_len;
1859 	txdesc.data_len = cpu_to_le16(data_len);
1860 	txdesc.len = cpu_to_be16(data_len);
1861 
1862 	idx = prism2_get_txfid_idx(local);
1863 	if (idx < 0)
1864 		goto fail;
1865 
1866 	if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1867 		hostap_dump_tx_header(dev->name, &txdesc);
1868 
1869 	spin_lock(&local->baplock);
1870 	res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1871 
1872 	if (!res)
1873 		res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1874 	if (!res)
1875 		res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1876 				     skb->len - hdr_len);
1877 	spin_unlock(&local->baplock);
1878 
1879 	if (!res)
1880 		res = prism2_transmit(dev, idx);
1881 	if (res) {
1882 		printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1883 		       dev->name);
1884 		local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1885 		schedule_work(&local->reset_queue);
1886 		goto fail;
1887 	}
1888 
1889 	ret = 0;
1890 
1891 fail:
1892 	prism2_callback(local, PRISM2_CALLBACK_TX_END);
1893 	return ret;
1894 }
1895 
1896 
1897 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1898  * register has changed values between consecutive reads for an unknown reason.
1899  * This should really not happen, so more debugging is needed. This test
1900  * version is a bit slower, but it will detect most of such register changes
1901  * and will try to get the correct fid eventually. */
1902 #define EXTRA_FID_READ_TESTS
1903 
1904 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1905 {
1906 #ifdef EXTRA_FID_READ_TESTS
1907 	u16 val, val2, val3;
1908 	int i;
1909 
1910 	for (i = 0; i < 10; i++) {
1911 		val = HFA384X_INW(reg);
1912 		val2 = HFA384X_INW(reg);
1913 		val3 = HFA384X_INW(reg);
1914 
1915 		if (val == val2 && val == val3)
1916 			return val;
1917 
1918 		printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1919 		       " %04x %04x %04x\n",
1920 		       dev->name, i, reg, val, val2, val3);
1921 		if ((val == val2 || val == val3) && val != 0)
1922 			return val;
1923 		if (val2 == val3 && val2 != 0)
1924 			return val2;
1925 	}
1926 	printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1927 	       "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1928 	return val;
1929 #else /* EXTRA_FID_READ_TESTS */
1930 	return HFA384X_INW(reg);
1931 #endif /* EXTRA_FID_READ_TESTS */
1932 }
1933 
1934 
1935 /* Called only as a tasklet (software IRQ) */
1936 static void prism2_rx(local_info_t *local)
1937 {
1938 	struct net_device *dev = local->dev;
1939 	int res, rx_pending = 0;
1940 	u16 len, hdr_len, rxfid, status, macport;
1941 	struct hfa384x_rx_frame rxdesc;
1942 	struct sk_buff *skb = NULL;
1943 
1944 	prism2_callback(local, PRISM2_CALLBACK_RX_START);
1945 
1946 	rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1947 #ifndef final_version
1948 	if (rxfid == 0) {
1949 		rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1950 		printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1951 		       rxfid);
1952 		if (rxfid == 0) {
1953 			schedule_work(&local->reset_queue);
1954 			goto rx_dropped;
1955 		}
1956 		/* try to continue with the new rxfid value */
1957 	}
1958 #endif
1959 
1960 	spin_lock(&local->baplock);
1961 	res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1962 	if (!res)
1963 		res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1964 
1965 	if (res) {
1966 		spin_unlock(&local->baplock);
1967 		printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1968 		       res);
1969 		if (res == -ETIMEDOUT) {
1970 			schedule_work(&local->reset_queue);
1971 		}
1972 		goto rx_dropped;
1973 	}
1974 
1975 	len = le16_to_cpu(rxdesc.data_len);
1976 	hdr_len = sizeof(rxdesc);
1977 	status = le16_to_cpu(rxdesc.status);
1978 	macport = (status >> 8) & 0x07;
1979 
1980 	/* Drop frames with too large reported payload length. Monitor mode
1981 	 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1982 	 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1983 	 * macport 7 */
1984 	if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1985 		if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1986 			if (len >= (u16) -14) {
1987 				hdr_len -= 65535 - len;
1988 				hdr_len--;
1989 			}
1990 			len = 0;
1991 		} else {
1992 			spin_unlock(&local->baplock);
1993 			printk(KERN_DEBUG "%s: Received frame with invalid "
1994 			       "length 0x%04x\n", dev->name, len);
1995 			hostap_dump_rx_header(dev->name, &rxdesc);
1996 			goto rx_dropped;
1997 		}
1998 	}
1999 
2000 	skb = dev_alloc_skb(len + hdr_len);
2001 	if (!skb) {
2002 		spin_unlock(&local->baplock);
2003 		printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2004 		       dev->name);
2005 		goto rx_dropped;
2006 	}
2007 	skb->dev = dev;
2008 	skb_put_data(skb, &rxdesc, hdr_len);
2009 
2010 	if (len > 0)
2011 		res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2012 	spin_unlock(&local->baplock);
2013 	if (res) {
2014 		printk(KERN_DEBUG "%s: RX failed to read "
2015 		       "frame data\n", dev->name);
2016 		goto rx_dropped;
2017 	}
2018 
2019 	skb_queue_tail(&local->rx_list, skb);
2020 	tasklet_schedule(&local->rx_tasklet);
2021 
2022  rx_exit:
2023 	prism2_callback(local, PRISM2_CALLBACK_RX_END);
2024 	if (!rx_pending) {
2025 		HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2026 	}
2027 
2028 	return;
2029 
2030  rx_dropped:
2031 	dev->stats.rx_dropped++;
2032 	if (skb)
2033 		dev_kfree_skb(skb);
2034 	goto rx_exit;
2035 }
2036 
2037 
2038 /* Called only as a tasklet (software IRQ) */
2039 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2040 {
2041 	struct hfa384x_rx_frame *rxdesc;
2042 	struct net_device *dev = skb->dev;
2043 	struct hostap_80211_rx_status stats;
2044 	int hdrlen, rx_hdrlen;
2045 
2046 	rx_hdrlen = sizeof(*rxdesc);
2047 	if (skb->len < sizeof(*rxdesc)) {
2048 		/* Allow monitor mode to receive shorter frames */
2049 		if (local->iw_mode == IW_MODE_MONITOR &&
2050 		    skb->len >= sizeof(*rxdesc) - 30) {
2051 			rx_hdrlen = skb->len;
2052 		} else {
2053 			dev_kfree_skb(skb);
2054 			return;
2055 		}
2056 	}
2057 
2058 	rxdesc = (struct hfa384x_rx_frame *) skb->data;
2059 
2060 	if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2061 	    skb->len >= sizeof(*rxdesc))
2062 		hostap_dump_rx_header(dev->name, rxdesc);
2063 
2064 	if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2065 	    (!local->monitor_allow_fcserr ||
2066 	     local->iw_mode != IW_MODE_MONITOR))
2067 		goto drop;
2068 
2069 	if (skb->len > PRISM2_DATA_MAXLEN) {
2070 		printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2071 		       dev->name, skb->len, PRISM2_DATA_MAXLEN);
2072 		goto drop;
2073 	}
2074 
2075 	stats.mac_time = le32_to_cpu(rxdesc->time);
2076 	stats.signal = rxdesc->signal - local->rssi_to_dBm;
2077 	stats.noise = rxdesc->silence - local->rssi_to_dBm;
2078 	stats.rate = rxdesc->rate;
2079 
2080 	/* Convert Prism2 RX structure into IEEE 802.11 header */
2081 	hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2082 	if (hdrlen > rx_hdrlen)
2083 		hdrlen = rx_hdrlen;
2084 
2085 	memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2086 		&rxdesc->frame_control, hdrlen);
2087 
2088 	hostap_80211_rx(dev, skb, &stats);
2089 	return;
2090 
2091  drop:
2092 	dev_kfree_skb(skb);
2093 }
2094 
2095 
2096 /* Called only as a tasklet (software IRQ) */
2097 static void hostap_rx_tasklet(unsigned long data)
2098 {
2099 	local_info_t *local = (local_info_t *) data;
2100 	struct sk_buff *skb;
2101 
2102 	while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2103 		hostap_rx_skb(local, skb);
2104 }
2105 
2106 
2107 /* Called only from hardware IRQ */
2108 static void prism2_alloc_ev(struct net_device *dev)
2109 {
2110 	struct hostap_interface *iface;
2111 	local_info_t *local;
2112 	int idx;
2113 	u16 fid;
2114 
2115 	iface = netdev_priv(dev);
2116 	local = iface->local;
2117 
2118 	fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2119 
2120 	PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2121 
2122 	spin_lock(&local->txfidlock);
2123 	idx = local->next_alloc;
2124 
2125 	do {
2126 		if (local->txfid[idx] == fid) {
2127 			PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2128 			       idx);
2129 
2130 #ifndef final_version
2131 			if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2132 				printk("Already released txfid found at idx "
2133 				       "%d\n", idx);
2134 			if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2135 				printk("Already reserved txfid found at idx "
2136 				       "%d\n", idx);
2137 #endif
2138 			local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2139 			idx++;
2140 			local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2141 				idx;
2142 
2143 			if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2144 			    netif_queue_stopped(dev))
2145 				netif_wake_queue(dev);
2146 
2147 			spin_unlock(&local->txfidlock);
2148 			return;
2149 		}
2150 
2151 		idx++;
2152 		if (idx >= PRISM2_TXFID_COUNT)
2153 			idx = 0;
2154 	} while (idx != local->next_alloc);
2155 
2156 	printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2157 	       "read 0x%04x) for alloc event\n", dev->name, fid,
2158 	       HFA384X_INW(HFA384X_ALLOCFID_OFF));
2159 	printk(KERN_DEBUG "TXFIDs:");
2160 	for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2161 		printk(" %04x[%04x]", local->txfid[idx],
2162 		       local->intransmitfid[idx]);
2163 	printk("\n");
2164 	spin_unlock(&local->txfidlock);
2165 
2166 	/* FIX: should probably schedule reset; reference to one txfid was lost
2167 	 * completely.. Bad things will happen if we run out of txfids
2168 	 * Actually, this will cause netdev watchdog to notice TX timeout and
2169 	 * then card reset after all txfids have been leaked. */
2170 }
2171 
2172 
2173 /* Called only as a tasklet (software IRQ) */
2174 static void hostap_tx_callback(local_info_t *local,
2175 			       struct hfa384x_tx_frame *txdesc, int ok,
2176 			       char *payload)
2177 {
2178 	u16 sw_support, hdrlen, len;
2179 	struct sk_buff *skb;
2180 	struct hostap_tx_callback_info *cb;
2181 
2182 	/* Make sure that frame was from us. */
2183 	if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2184 		printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2185 		       local->dev->name);
2186 		return;
2187 	}
2188 
2189 	sw_support = le32_to_cpu(txdesc->sw_support);
2190 
2191 	spin_lock(&local->lock);
2192 	cb = local->tx_callback;
2193 	while (cb != NULL && cb->idx != sw_support)
2194 		cb = cb->next;
2195 	spin_unlock(&local->lock);
2196 
2197 	if (cb == NULL) {
2198 		printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2199 		       local->dev->name, sw_support);
2200 		return;
2201 	}
2202 
2203 	hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2204 	len = le16_to_cpu(txdesc->data_len);
2205 	skb = dev_alloc_skb(hdrlen + len);
2206 	if (skb == NULL) {
2207 		printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2208 		       "skb\n", local->dev->name);
2209 		return;
2210 	}
2211 
2212 	skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2213 	if (payload)
2214 		skb_put_data(skb, payload, len);
2215 
2216 	skb->dev = local->dev;
2217 	skb_reset_mac_header(skb);
2218 
2219 	cb->func(skb, ok, cb->data);
2220 }
2221 
2222 
2223 /* Called only as a tasklet (software IRQ) */
2224 static int hostap_tx_compl_read(local_info_t *local, int error,
2225 				struct hfa384x_tx_frame *txdesc,
2226 				char **payload)
2227 {
2228 	u16 fid, len;
2229 	int res, ret = 0;
2230 	struct net_device *dev = local->dev;
2231 
2232 	fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2233 
2234 	PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2235 
2236 	spin_lock(&local->baplock);
2237 	res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2238 	if (!res)
2239 		res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2240 	if (res) {
2241 		PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2242 		       "read txdesc\n", dev->name, error, fid);
2243 		if (res == -ETIMEDOUT) {
2244 			schedule_work(&local->reset_queue);
2245 		}
2246 		ret = -1;
2247 		goto fail;
2248 	}
2249 	if (txdesc->sw_support) {
2250 		len = le16_to_cpu(txdesc->data_len);
2251 		if (len < PRISM2_DATA_MAXLEN) {
2252 			*payload = kmalloc(len, GFP_ATOMIC);
2253 			if (*payload == NULL ||
2254 			    hfa384x_from_bap(dev, BAP0, *payload, len)) {
2255 				PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2256 				       "frame payload\n", dev->name);
2257 				kfree(*payload);
2258 				*payload = NULL;
2259 				ret = -1;
2260 				goto fail;
2261 			}
2262 		}
2263 	}
2264 
2265  fail:
2266 	spin_unlock(&local->baplock);
2267 
2268 	return ret;
2269 }
2270 
2271 
2272 /* Called only as a tasklet (software IRQ) */
2273 static void prism2_tx_ev(local_info_t *local)
2274 {
2275 	struct net_device *dev = local->dev;
2276 	char *payload = NULL;
2277 	struct hfa384x_tx_frame txdesc;
2278 
2279 	if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2280 		goto fail;
2281 
2282 	if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2283 		PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2284 		       "retry_count=%d tx_rate=%d seq_ctrl=%d "
2285 		       "duration_id=%d\n",
2286 		       dev->name, le16_to_cpu(txdesc.status),
2287 		       txdesc.retry_count, txdesc.tx_rate,
2288 		       le16_to_cpu(txdesc.seq_ctrl),
2289 		       le16_to_cpu(txdesc.duration_id));
2290 	}
2291 
2292 	if (txdesc.sw_support)
2293 		hostap_tx_callback(local, &txdesc, 1, payload);
2294 	kfree(payload);
2295 
2296  fail:
2297 	HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2298 }
2299 
2300 
2301 /* Called only as a tasklet (software IRQ) */
2302 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2303 {
2304 	local_info_t *local = (local_info_t *) data;
2305 	struct sk_buff *skb;
2306 
2307 	while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2308 		struct hfa384x_tx_frame *txdesc =
2309 			(struct hfa384x_tx_frame *) skb->data;
2310 
2311 		if (skb->len >= sizeof(*txdesc)) {
2312 			/* Convert Prism2 RX structure into IEEE 802.11 header
2313 			 */
2314 			int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2315 			memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2316 				&txdesc->frame_control, hdrlen);
2317 
2318 			hostap_handle_sta_tx_exc(local, skb);
2319 		}
2320 		dev_kfree_skb(skb);
2321 	}
2322 }
2323 
2324 
2325 /* Called only as a tasklet (software IRQ) */
2326 static void prism2_txexc(local_info_t *local)
2327 {
2328 	struct net_device *dev = local->dev;
2329 	u16 status, fc;
2330 	int show_dump, res;
2331 	char *payload = NULL;
2332 	struct hfa384x_tx_frame txdesc;
2333 
2334 	show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2335 	dev->stats.tx_errors++;
2336 
2337 	res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2338 	HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2339 	if (res)
2340 		return;
2341 
2342 	status = le16_to_cpu(txdesc.status);
2343 
2344 	/* We produce a TXDROP event only for retry or lifetime
2345 	 * exceeded, because that's the only status that really mean
2346 	 * that this particular node went away.
2347 	 * Other errors means that *we* screwed up. - Jean II */
2348 	if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2349 	{
2350 		union iwreq_data wrqu;
2351 
2352 		/* Copy 802.11 dest address. */
2353 		memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2354 		wrqu.addr.sa_family = ARPHRD_ETHER;
2355 		wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2356 	} else
2357 		show_dump = 1;
2358 
2359 	if (local->iw_mode == IW_MODE_MASTER ||
2360 	    local->iw_mode == IW_MODE_REPEAT ||
2361 	    local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2362 		struct sk_buff *skb;
2363 		skb = dev_alloc_skb(sizeof(txdesc));
2364 		if (skb) {
2365 			skb_put_data(skb, &txdesc, sizeof(txdesc));
2366 			skb_queue_tail(&local->sta_tx_exc_list, skb);
2367 			tasklet_schedule(&local->sta_tx_exc_tasklet);
2368 		}
2369 	}
2370 
2371 	if (txdesc.sw_support)
2372 		hostap_tx_callback(local, &txdesc, 0, payload);
2373 	kfree(payload);
2374 
2375 	if (!show_dump)
2376 		return;
2377 
2378 	PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2379 	       " tx_control=%04x\n",
2380 	       dev->name, status,
2381 	       status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2382 	       status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2383 	       status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2384 	       status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2385 	       le16_to_cpu(txdesc.tx_control));
2386 
2387 	fc = le16_to_cpu(txdesc.frame_control);
2388 	PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2389 	       "(%s%s%s::%d%s%s)\n",
2390 	       txdesc.retry_count, txdesc.tx_rate, fc,
2391 	       ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2392 	       ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2393 	       ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2394 	       (fc & IEEE80211_FCTL_STYPE) >> 4,
2395 	       ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2396 	       ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2397 	PDEBUG(DEBUG_EXTRA, "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
2398 	       txdesc.addr1, txdesc.addr2,
2399 	       txdesc.addr3, txdesc.addr4);
2400 }
2401 
2402 
2403 /* Called only as a tasklet (software IRQ) */
2404 static 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) */
2417 static void prism2_info(local_info_t *local)
2418 {
2419 	struct net_device *dev = local->dev;
2420 	u16 fid;
2421 	int res, left;
2422 	struct hfa384x_info_frame info;
2423 	struct sk_buff *skb;
2424 
2425 	fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2426 
2427 	spin_lock(&local->baplock);
2428 	res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2429 	if (!res)
2430 		res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2431 	if (res) {
2432 		spin_unlock(&local->baplock);
2433 		printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2434 		       fid);
2435 		if (res == -ETIMEDOUT) {
2436 			schedule_work(&local->reset_queue);
2437 		}
2438 		goto out;
2439 	}
2440 
2441 	left = (le16_to_cpu(info.len) - 1) * 2;
2442 
2443 	if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2444 		/* data register seems to give 0x8000 in some error cases even
2445 		 * though busy bit is not set in offset register;
2446 		 * in addition, length must be at least 1 due to type field */
2447 		spin_unlock(&local->baplock);
2448 		printk(KERN_DEBUG "%s: Received info frame with invalid "
2449 		       "length 0x%04x (type 0x%04x)\n", dev->name,
2450 		       le16_to_cpu(info.len), le16_to_cpu(info.type));
2451 		goto out;
2452 	}
2453 
2454 	skb = dev_alloc_skb(sizeof(info) + left);
2455 	if (skb == NULL) {
2456 		spin_unlock(&local->baplock);
2457 		printk(KERN_DEBUG "%s: Could not allocate skb for info "
2458 		       "frame\n", dev->name);
2459 		goto out;
2460 	}
2461 
2462 	skb_put_data(skb, &info, sizeof(info));
2463 	if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2464 	{
2465 		spin_unlock(&local->baplock);
2466 		printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2467 		       "len=0x%04x, type=0x%04x\n", dev->name, fid,
2468 		       le16_to_cpu(info.len), le16_to_cpu(info.type));
2469 		dev_kfree_skb(skb);
2470 		goto out;
2471 	}
2472 	spin_unlock(&local->baplock);
2473 
2474 	skb_queue_tail(&local->info_list, skb);
2475 	tasklet_schedule(&local->info_tasklet);
2476 
2477  out:
2478 	HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2479 }
2480 
2481 
2482 /* Called only as a tasklet (software IRQ) */
2483 static void hostap_bap_tasklet(unsigned long data)
2484 {
2485 	local_info_t *local = (local_info_t *) data;
2486 	struct net_device *dev = local->dev;
2487 	u16 ev;
2488 	int frames = 30;
2489 
2490 	if (local->func->card_present && !local->func->card_present(local))
2491 		return;
2492 
2493 	set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2494 
2495 	/* Process all pending BAP events without generating new interrupts
2496 	 * for them */
2497 	while (frames-- > 0) {
2498 		ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2499 		if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2500 			break;
2501 		if (ev & HFA384X_EV_RX)
2502 			prism2_rx(local);
2503 		if (ev & HFA384X_EV_INFO)
2504 			prism2_info(local);
2505 		if (ev & HFA384X_EV_TX)
2506 			prism2_tx_ev(local);
2507 		if (ev & HFA384X_EV_TXEXC)
2508 			prism2_txexc(local);
2509 	}
2510 
2511 	set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2512 	clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2513 
2514 	/* Enable interrupts for new BAP events */
2515 	hfa384x_events_all(dev);
2516 	clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2517 }
2518 
2519 
2520 /* Called only from hardware IRQ */
2521 static void prism2_infdrop(struct net_device *dev)
2522 {
2523 	static unsigned long last_inquire = 0;
2524 
2525 	PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2526 
2527 	/* some firmware versions seem to get stuck with
2528 	 * full CommTallies in high traffic load cases; every
2529 	 * packet will then cause INFDROP event and CommTallies
2530 	 * info frame will not be sent automatically. Try to
2531 	 * get out of this state by inquiring CommTallies. */
2532 	if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2533 		hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2534 				     HFA384X_INFO_COMMTALLIES, NULL, 0);
2535 		last_inquire = jiffies;
2536 	}
2537 }
2538 
2539 
2540 /* Called only from hardware IRQ */
2541 static 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 */
2574 static void prism2_check_magic(local_info_t *local)
2575 {
2576 	/* at least PCI Prism2.5 with bus mastering seems to sometimes
2577 	 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2578 	 * register once or twice seems to get the correct value.. PCI cards
2579 	 * cannot anyway be removed during normal operation, so there is not
2580 	 * really any need for this verification with them. */
2581 
2582 #ifndef PRISM2_PCI
2583 #ifndef final_version
2584 	static unsigned long last_magic_err = 0;
2585 	struct net_device *dev = local->dev;
2586 
2587 	if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2588 		if (!local->hw_ready)
2589 			return;
2590 		HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2591 		if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2592 			printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2593 			       "%04X != %04X - card removed?\n", dev->name,
2594 			       HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2595 			       HFA384X_MAGIC);
2596 			last_magic_err = jiffies;
2597 		} else if (net_ratelimit()) {
2598 			printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2599 			       "MAGIC=%04x\n", dev->name,
2600 			       HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2601 			       HFA384X_MAGIC);
2602 		}
2603 		if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2604 			schedule_work(&local->reset_queue);
2605 		return;
2606 	}
2607 #endif /* final_version */
2608 #endif /* !PRISM2_PCI */
2609 }
2610 
2611 
2612 /* Called only from hardware IRQ */
2613 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2614 {
2615 	struct net_device *dev = dev_id;
2616 	struct hostap_interface *iface;
2617 	local_info_t *local;
2618 	int events = 0;
2619 	u16 ev;
2620 
2621 	iface = netdev_priv(dev);
2622 	local = iface->local;
2623 
2624 	/* Detect early interrupt before driver is fully configured */
2625 	spin_lock(&local->irq_init_lock);
2626 	if (!dev->base_addr) {
2627 		if (net_ratelimit()) {
2628 			printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2629 			       dev->name);
2630 		}
2631 		spin_unlock(&local->irq_init_lock);
2632 		return IRQ_HANDLED;
2633 	}
2634 	spin_unlock(&local->irq_init_lock);
2635 
2636 	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2637 
2638 	if (local->func->card_present && !local->func->card_present(local)) {
2639 		if (net_ratelimit()) {
2640 			printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2641 			       dev->name);
2642 		}
2643 		return IRQ_HANDLED;
2644 	}
2645 
2646 	prism2_check_magic(local);
2647 
2648 	for (;;) {
2649 		ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2650 		if (ev == 0xffff) {
2651 			if (local->shutdown)
2652 				return IRQ_HANDLED;
2653 			HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2654 			printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2655 			       dev->name);
2656 			return IRQ_HANDLED;
2657 		}
2658 
2659 		ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2660 		if (ev == 0)
2661 			break;
2662 
2663 		if (ev & HFA384X_EV_CMD) {
2664 			prism2_cmd_ev(dev);
2665 		}
2666 
2667 		/* Above events are needed even before hw is ready, but other
2668 		 * events should be skipped during initialization. This may
2669 		 * change for AllocEv if allocate_fid is implemented without
2670 		 * busy waiting. */
2671 		if (!local->hw_ready || local->hw_resetting ||
2672 		    !local->dev_enabled) {
2673 			ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2674 			if (ev & HFA384X_EV_CMD)
2675 				goto next_event;
2676 			if ((ev & HFA384X_EVENT_MASK) == 0)
2677 				return IRQ_HANDLED;
2678 			if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2679 			    net_ratelimit()) {
2680 				printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2681 				       "not ready; skipping events 0x%04x "
2682 				       "(IntEn=0x%04x)%s%s%s\n",
2683 				       dev->name, ev,
2684 				       HFA384X_INW(HFA384X_INTEN_OFF),
2685 				       !local->hw_ready ? " (!hw_ready)" : "",
2686 				       local->hw_resetting ?
2687 				       " (hw_resetting)" : "",
2688 				       !local->dev_enabled ?
2689 				       " (!dev_enabled)" : "");
2690 			}
2691 			HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2692 			return IRQ_HANDLED;
2693 		}
2694 
2695 		if (ev & HFA384X_EV_TICK) {
2696 			prism2_ev_tick(dev);
2697 			HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2698 		}
2699 
2700 		if (ev & HFA384X_EV_ALLOC) {
2701 			prism2_alloc_ev(dev);
2702 			HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2703 		}
2704 
2705 		/* Reading data from the card is quite time consuming, so do it
2706 		 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2707 		 * and unmasked after needed data has been read completely. */
2708 		if (ev & HFA384X_BAP0_EVENTS) {
2709 			hfa384x_events_no_bap0(dev);
2710 			tasklet_schedule(&local->bap_tasklet);
2711 		}
2712 
2713 #ifndef final_version
2714 		if (ev & HFA384X_EV_WTERR) {
2715 			PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2716 			HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2717 		}
2718 #endif /* final_version */
2719 
2720 		if (ev & HFA384X_EV_INFDROP) {
2721 			prism2_infdrop(dev);
2722 			HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2723 		}
2724 
2725 	next_event:
2726 		events++;
2727 		if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2728 			PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2729 			       "(EvStat=0x%04x)\n",
2730 			       PRISM2_MAX_INTERRUPT_EVENTS,
2731 			       HFA384X_INW(HFA384X_EVSTAT_OFF));
2732 			break;
2733 		}
2734 	}
2735 	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2736 	return IRQ_RETVAL(events);
2737 }
2738 
2739 
2740 static void prism2_check_sta_fw_version(local_info_t *local)
2741 {
2742 	struct hfa384x_comp_ident comp;
2743 	int id, variant, major, minor;
2744 
2745 	if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2746 			    &comp, sizeof(comp), 1) < 0)
2747 		return;
2748 
2749 	local->fw_ap = 0;
2750 	id = le16_to_cpu(comp.id);
2751 	if (id != HFA384X_COMP_ID_STA) {
2752 		if (id == HFA384X_COMP_ID_FW_AP)
2753 			local->fw_ap = 1;
2754 		return;
2755 	}
2756 
2757 	major = __le16_to_cpu(comp.major);
2758 	minor = __le16_to_cpu(comp.minor);
2759 	variant = __le16_to_cpu(comp.variant);
2760 	local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2761 
2762 	/* Station firmware versions before 1.4.x seem to have a bug in
2763 	 * firmware-based WEP encryption when using Host AP mode, so use
2764 	 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2765 	 * first one that has been seen to produce correct encryption, but the
2766 	 * bug might be fixed before that (although, at least 1.4.2 is broken).
2767 	 */
2768 	local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2769 
2770 	if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2771 	    !local->fw_encrypt_ok) {
2772 		printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2773 		       "a workaround for firmware bug in Host AP mode WEP\n",
2774 		       local->dev->name);
2775 		local->host_encrypt = 1;
2776 	}
2777 
2778 	/* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2779 	 * in station firmware versions before 1.5.x. With these versions, the
2780 	 * driver uses a workaround with bogus frame format (4th address after
2781 	 * the payload). This is not compatible with other AP devices. Since
2782 	 * the firmware bug is fixed in the latest station firmware versions,
2783 	 * automatically enable standard compliant mode for cards using station
2784 	 * firmware version 1.5.0 or newer. */
2785 	if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2786 		local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2787 	else {
2788 		printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2789 		       "workaround for firmware bug in Host AP mode WDS\n",
2790 		       local->dev->name);
2791 	}
2792 
2793 	hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2794 }
2795 
2796 
2797 static void hostap_passive_scan(unsigned long data)
2798 {
2799 	local_info_t *local = (local_info_t *) data;
2800 	struct net_device *dev = local->dev;
2801 	u16 chan;
2802 
2803 	if (local->passive_scan_interval <= 0)
2804 		return;
2805 
2806 	if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2807 		int max_tries = 16;
2808 
2809 		/* Even though host system does not really know when the WLAN
2810 		 * MAC is sending frames, try to avoid changing channels for
2811 		 * passive scanning when a host-generated frame is being
2812 		 * transmitted */
2813 		if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2814 			printk(KERN_DEBUG "%s: passive scan detected pending "
2815 			       "TX - delaying\n", dev->name);
2816 			local->passive_scan_timer.expires = jiffies + HZ / 10;
2817 			add_timer(&local->passive_scan_timer);
2818 			return;
2819 		}
2820 
2821 		do {
2822 			local->passive_scan_channel++;
2823 			if (local->passive_scan_channel > 14)
2824 				local->passive_scan_channel = 1;
2825 			max_tries--;
2826 		} while (!(local->channel_mask &
2827 			   (1 << (local->passive_scan_channel - 1))) &&
2828 			 max_tries > 0);
2829 
2830 		if (max_tries == 0) {
2831 			printk(KERN_INFO "%s: no allowed passive scan channels"
2832 			       " found\n", dev->name);
2833 			return;
2834 		}
2835 
2836 		printk(KERN_DEBUG "%s: passive scan channel %d\n",
2837 		       dev->name, local->passive_scan_channel);
2838 		chan = local->passive_scan_channel;
2839 		local->passive_scan_state = PASSIVE_SCAN_WAIT;
2840 		local->passive_scan_timer.expires = jiffies + HZ / 10;
2841 	} else {
2842 		chan = local->channel;
2843 		local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2844 		local->passive_scan_timer.expires = jiffies +
2845 			local->passive_scan_interval * HZ;
2846 	}
2847 
2848 	if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2849 				 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2850 				 chan, NULL, 0))
2851 		printk(KERN_ERR "%s: passive scan channel set %d "
2852 		       "failed\n", dev->name, chan);
2853 
2854 	add_timer(&local->passive_scan_timer);
2855 }
2856 
2857 
2858 /* Called only as a scheduled task when communications quality values should
2859  * be updated. */
2860 static void handle_comms_qual_update(struct work_struct *work)
2861 {
2862 	local_info_t *local =
2863 		container_of(work, local_info_t, comms_qual_update);
2864 	prism2_update_comms_qual(local->dev);
2865 }
2866 
2867 
2868 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2869  * used to monitor that local->last_tick_timer is being updated. If not,
2870  * interrupt busy-loop is assumed and driver tries to recover by masking out
2871  * some events. */
2872 static 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,
2884 				     HFA384X_INFO_COMMTALLIES, NULL, 0);
2885 		last_inquire = jiffies;
2886 	}
2887 
2888 	if ((local->last_comms_qual_update == 0 ||
2889 	     time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2890 	    (local->iw_mode == IW_MODE_INFRA ||
2891 	     local->iw_mode == IW_MODE_ADHOC)) {
2892 		schedule_work(&local->comms_qual_update);
2893 	}
2894 
2895 	local->tick_timer.expires = jiffies + 2 * HZ;
2896 	add_timer(&local->tick_timer);
2897 }
2898 
2899 
2900 #ifndef PRISM2_NO_PROCFS_DEBUG
2901 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2902 {
2903 	local_info_t *local = m->private;
2904 
2905 #define SHOW_REG(n) \
2906   seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2907 
2908 	SHOW_REG(CMD);
2909 	SHOW_REG(PARAM0);
2910 	SHOW_REG(PARAM1);
2911 	SHOW_REG(PARAM2);
2912 	SHOW_REG(STATUS);
2913 	SHOW_REG(RESP0);
2914 	SHOW_REG(RESP1);
2915 	SHOW_REG(RESP2);
2916 	SHOW_REG(INFOFID);
2917 	SHOW_REG(CONTROL);
2918 	SHOW_REG(SELECT0);
2919 	SHOW_REG(SELECT1);
2920 	SHOW_REG(OFFSET0);
2921 	SHOW_REG(OFFSET1);
2922 	SHOW_REG(RXFID);
2923 	SHOW_REG(ALLOCFID);
2924 	SHOW_REG(TXCOMPLFID);
2925 	SHOW_REG(SWSUPPORT0);
2926 	SHOW_REG(SWSUPPORT1);
2927 	SHOW_REG(SWSUPPORT2);
2928 	SHOW_REG(EVSTAT);
2929 	SHOW_REG(INTEN);
2930 	SHOW_REG(EVACK);
2931 	/* Do not read data registers, because they change the state of the
2932 	 * MAC (offset += 2) */
2933 	/* SHOW_REG(DATA0); */
2934 	/* SHOW_REG(DATA1); */
2935 	SHOW_REG(AUXPAGE);
2936 	SHOW_REG(AUXOFFSET);
2937 	/* SHOW_REG(AUXDATA); */
2938 #ifdef PRISM2_PCI
2939 	SHOW_REG(PCICOR);
2940 	SHOW_REG(PCIHCR);
2941 	SHOW_REG(PCI_M0_ADDRH);
2942 	SHOW_REG(PCI_M0_ADDRL);
2943 	SHOW_REG(PCI_M0_LEN);
2944 	SHOW_REG(PCI_M0_CTL);
2945 	SHOW_REG(PCI_STATUS);
2946 	SHOW_REG(PCI_M1_ADDRH);
2947 	SHOW_REG(PCI_M1_ADDRL);
2948 	SHOW_REG(PCI_M1_LEN);
2949 	SHOW_REG(PCI_M1_CTL);
2950 #endif /* PRISM2_PCI */
2951 
2952 	return 0;
2953 }
2954 
2955 static int prism2_registers_proc_open(struct inode *inode, struct file *file)
2956 {
2957 	return single_open(file, prism2_registers_proc_show, PDE_DATA(inode));
2958 }
2959 
2960 static const struct file_operations prism2_registers_proc_fops = {
2961 	.open		= prism2_registers_proc_open,
2962 	.read		= seq_read,
2963 	.llseek		= seq_lseek,
2964 	.release	= single_release,
2965 };
2966 
2967 #endif /* PRISM2_NO_PROCFS_DEBUG */
2968 
2969 
2970 struct set_tim_data {
2971 	struct list_head list;
2972 	int aid;
2973 	int set;
2974 };
2975 
2976 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2977 {
2978 	struct list_head *ptr;
2979 	struct set_tim_data *new_entry;
2980 	struct hostap_interface *iface;
2981 	local_info_t *local;
2982 
2983 	iface = netdev_priv(dev);
2984 	local = iface->local;
2985 
2986 	new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2987 	if (new_entry == NULL)
2988 		return -ENOMEM;
2989 
2990 	new_entry->aid = aid;
2991 	new_entry->set = set;
2992 
2993 	spin_lock_bh(&local->set_tim_lock);
2994 	list_for_each(ptr, &local->set_tim_list) {
2995 		struct set_tim_data *entry =
2996 			list_entry(ptr, struct set_tim_data, list);
2997 		if (entry->aid == aid) {
2998 			PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2999 			       "set=%d ==> %d\n",
3000 			       local->dev->name, aid, entry->set, set);
3001 			entry->set = set;
3002 			kfree(new_entry);
3003 			new_entry = NULL;
3004 			break;
3005 		}
3006 	}
3007 	if (new_entry)
3008 		list_add_tail(&new_entry->list, &local->set_tim_list);
3009 	spin_unlock_bh(&local->set_tim_lock);
3010 
3011 	schedule_work(&local->set_tim_queue);
3012 
3013 	return 0;
3014 }
3015 
3016 
3017 static void handle_set_tim_queue(struct work_struct *work)
3018 {
3019 	local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3020 	struct set_tim_data *entry;
3021 	u16 val;
3022 
3023 	for (;;) {
3024 		entry = NULL;
3025 		spin_lock_bh(&local->set_tim_lock);
3026 		if (!list_empty(&local->set_tim_list)) {
3027 			entry = list_entry(local->set_tim_list.next,
3028 					   struct set_tim_data, list);
3029 			list_del(&entry->list);
3030 		}
3031 		spin_unlock_bh(&local->set_tim_lock);
3032 		if (!entry)
3033 			break;
3034 
3035 		PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3036 		       local->dev->name, entry->aid, entry->set);
3037 
3038 		val = entry->aid;
3039 		if (entry->set)
3040 			val |= 0x8000;
3041 		if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3042 			printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3043 			       "set=%d)\n",
3044 			       local->dev->name, entry->aid, entry->set);
3045 		}
3046 
3047 		kfree(entry);
3048 	}
3049 }
3050 
3051 
3052 static void prism2_clear_set_tim_queue(local_info_t *local)
3053 {
3054 	struct list_head *ptr, *n;
3055 
3056 	list_for_each_safe(ptr, n, &local->set_tim_list) {
3057 		struct set_tim_data *entry;
3058 		entry = list_entry(ptr, struct set_tim_data, list);
3059 		list_del(&entry->list);
3060 		kfree(entry);
3061 	}
3062 }
3063 
3064 
3065 /*
3066  * HostAP uses two layers of net devices, where the inner
3067  * layer gets called all the time from the outer layer.
3068  * This is a natural nesting, which needs a split lock type.
3069  */
3070 static struct lock_class_key hostap_netdev_xmit_lock_key;
3071 static struct lock_class_key hostap_netdev_addr_lock_key;
3072 
3073 static void prism2_set_lockdep_class_one(struct net_device *dev,
3074 					 struct netdev_queue *txq,
3075 					 void *_unused)
3076 {
3077 	lockdep_set_class(&txq->_xmit_lock,
3078 			  &hostap_netdev_xmit_lock_key);
3079 }
3080 
3081 static void prism2_set_lockdep_class(struct net_device *dev)
3082 {
3083 	lockdep_set_class(&dev->addr_list_lock,
3084 			  &hostap_netdev_addr_lock_key);
3085 	netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3086 }
3087 
3088 static struct net_device *
3089 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3090 		       struct device *sdev)
3091 {
3092 	struct net_device *dev;
3093 	struct hostap_interface *iface;
3094 	struct local_info *local;
3095 	int len, i, ret;
3096 
3097 	if (funcs == NULL)
3098 		return NULL;
3099 
3100 	len = strlen(dev_template);
3101 	if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3102 		printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3103 		       dev_template);
3104 		return NULL;
3105 	}
3106 
3107 	len = sizeof(struct hostap_interface) +
3108 		3 + sizeof(struct local_info) +
3109 		3 + sizeof(struct ap_data);
3110 
3111 	dev = alloc_etherdev(len);
3112 	if (dev == NULL)
3113 		return NULL;
3114 
3115 	iface = netdev_priv(dev);
3116 	local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3117 	local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3118 	local->dev = iface->dev = dev;
3119 	iface->local = local;
3120 	iface->type = HOSTAP_INTERFACE_MASTER;
3121 	INIT_LIST_HEAD(&local->hostap_interfaces);
3122 
3123 	local->hw_module = THIS_MODULE;
3124 
3125 #ifdef PRISM2_IO_DEBUG
3126 	local->io_debug_enabled = 1;
3127 #endif /* PRISM2_IO_DEBUG */
3128 
3129 	local->func = funcs;
3130 	local->func->cmd = hfa384x_cmd;
3131 	local->func->read_regs = hfa384x_read_regs;
3132 	local->func->get_rid = hfa384x_get_rid;
3133 	local->func->set_rid = hfa384x_set_rid;
3134 	local->func->hw_enable = prism2_hw_enable;
3135 	local->func->hw_config = prism2_hw_config;
3136 	local->func->hw_reset = prism2_hw_reset;
3137 	local->func->hw_shutdown = prism2_hw_shutdown;
3138 	local->func->reset_port = prism2_reset_port;
3139 	local->func->schedule_reset = prism2_schedule_reset;
3140 #ifdef PRISM2_DOWNLOAD_SUPPORT
3141 	local->func->read_aux_fops = &prism2_download_aux_dump_proc_fops;
3142 	local->func->download = prism2_download;
3143 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3144 	local->func->tx = prism2_tx_80211;
3145 	local->func->set_tim = prism2_set_tim;
3146 	local->func->need_tx_headroom = 0; /* no need to add txdesc in
3147 					    * skb->data (FIX: maybe for DMA bus
3148 					    * mastering? */
3149 
3150 	local->mtu = mtu;
3151 
3152 	rwlock_init(&local->iface_lock);
3153 	spin_lock_init(&local->txfidlock);
3154 	spin_lock_init(&local->cmdlock);
3155 	spin_lock_init(&local->baplock);
3156 	spin_lock_init(&local->lock);
3157 	spin_lock_init(&local->irq_init_lock);
3158 	mutex_init(&local->rid_bap_mtx);
3159 
3160 	if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3161 		card_idx = 0;
3162 	local->card_idx = card_idx;
3163 
3164 	len = strlen(essid);
3165 	memcpy(local->essid, essid,
3166 	       len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3167 	local->essid[MAX_SSID_LEN] = '\0';
3168 	i = GET_INT_PARM(iw_mode, card_idx);
3169 	if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3170 	    i == IW_MODE_MONITOR) {
3171 		local->iw_mode = i;
3172 	} else {
3173 		printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3174 		       "IW_MODE_MASTER\n", i);
3175 		local->iw_mode = IW_MODE_MASTER;
3176 	}
3177 	local->channel = GET_INT_PARM(channel, card_idx);
3178 	local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3179 	local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3180 	local->wds_max_connections = 16;
3181 	local->tx_control = HFA384X_TX_CTRL_FLAGS;
3182 	local->manual_retry_count = -1;
3183 	local->rts_threshold = 2347;
3184 	local->fragm_threshold = 2346;
3185 	local->rssi_to_dBm = 100; /* default; to be overriden by
3186 				   * cnfDbmAdjust, if available */
3187 	local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3188 	local->sram_type = -1;
3189 	local->scan_channel_mask = 0xffff;
3190 	local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3191 
3192 	/* Initialize task queue structures */
3193 	INIT_WORK(&local->reset_queue, handle_reset_queue);
3194 	INIT_WORK(&local->set_multicast_list_queue,
3195 		  hostap_set_multicast_list_queue);
3196 
3197 	INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3198 	INIT_LIST_HEAD(&local->set_tim_list);
3199 	spin_lock_init(&local->set_tim_lock);
3200 
3201 	INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3202 
3203 	/* Initialize tasklets for handling hardware IRQ related operations
3204 	 * outside hw IRQ handler */
3205 #define HOSTAP_TASKLET_INIT(q, f, d) \
3206 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3207 while (0)
3208 	HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3209 			    (unsigned long) local);
3210 
3211 	HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3212 			    (unsigned long) local);
3213 	hostap_info_init(local);
3214 
3215 	HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3216 			    hostap_rx_tasklet, (unsigned long) local);
3217 	skb_queue_head_init(&local->rx_list);
3218 
3219 	HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3220 			    hostap_sta_tx_exc_tasklet, (unsigned long) local);
3221 	skb_queue_head_init(&local->sta_tx_exc_list);
3222 
3223 	INIT_LIST_HEAD(&local->cmd_queue);
3224 	init_waitqueue_head(&local->hostscan_wq);
3225 
3226 	lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3227 
3228 	init_timer(&local->passive_scan_timer);
3229 	local->passive_scan_timer.data = (unsigned long) local;
3230 	local->passive_scan_timer.function = hostap_passive_scan;
3231 
3232 	init_timer(&local->tick_timer);
3233 	local->tick_timer.data = (unsigned long) local;
3234 	local->tick_timer.function = hostap_tick_timer;
3235 	local->tick_timer.expires = jiffies + 2 * HZ;
3236 	add_timer(&local->tick_timer);
3237 
3238 	INIT_LIST_HEAD(&local->bss_list);
3239 
3240 	hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3241 
3242 	dev->type = ARPHRD_IEEE80211;
3243 	dev->header_ops = &hostap_80211_ops;
3244 
3245 	rtnl_lock();
3246 	ret = dev_alloc_name(dev, "wifi%d");
3247 	SET_NETDEV_DEV(dev, sdev);
3248 	if (ret >= 0)
3249 		ret = register_netdevice(dev);
3250 
3251 	prism2_set_lockdep_class(dev);
3252 	rtnl_unlock();
3253 	if (ret < 0) {
3254 		printk(KERN_WARNING "%s: register netdevice failed!\n",
3255 		       dev_info);
3256 		goto fail;
3257 	}
3258 	printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3259 
3260 	hostap_init_data(local);
3261 	return dev;
3262 
3263  fail:
3264 	free_netdev(dev);
3265 	return NULL;
3266 }
3267 
3268 
3269 static int hostap_hw_ready(struct net_device *dev)
3270 {
3271 	struct hostap_interface *iface;
3272 	struct local_info *local;
3273 
3274 	iface = netdev_priv(dev);
3275 	local = iface->local;
3276 	local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3277 					   "", dev_template);
3278 
3279 	if (local->ddev) {
3280 		if (local->iw_mode == IW_MODE_INFRA ||
3281 		    local->iw_mode == IW_MODE_ADHOC) {
3282 			netif_carrier_off(local->dev);
3283 			netif_carrier_off(local->ddev);
3284 		}
3285 		hostap_init_proc(local);
3286 #ifndef PRISM2_NO_PROCFS_DEBUG
3287 		proc_create_data("registers", 0, local->proc,
3288 				 &prism2_registers_proc_fops, local);
3289 #endif /* PRISM2_NO_PROCFS_DEBUG */
3290 		hostap_init_ap_proc(local);
3291 		return 0;
3292 	}
3293 
3294 	return -1;
3295 }
3296 
3297 
3298 static void prism2_free_local_data(struct net_device *dev)
3299 {
3300 	struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3301 	int i;
3302 	struct hostap_interface *iface;
3303 	struct local_info *local;
3304 	struct list_head *ptr, *n;
3305 
3306 	if (dev == NULL)
3307 		return;
3308 
3309 	iface = netdev_priv(dev);
3310 	local = iface->local;
3311 
3312 	/* Unregister all netdevs before freeing local data. */
3313 	list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3314 		iface = list_entry(ptr, struct hostap_interface, list);
3315 		if (iface->type == HOSTAP_INTERFACE_MASTER) {
3316 			/* special handling for this interface below */
3317 			continue;
3318 		}
3319 		hostap_remove_interface(iface->dev, 0, 1);
3320 	}
3321 
3322 	unregister_netdev(local->dev);
3323 
3324 	flush_work(&local->reset_queue);
3325 	flush_work(&local->set_multicast_list_queue);
3326 	flush_work(&local->set_tim_queue);
3327 #ifndef PRISM2_NO_STATION_MODES
3328 	flush_work(&local->info_queue);
3329 #endif
3330 	flush_work(&local->comms_qual_update);
3331 
3332 	lib80211_crypt_info_free(&local->crypt_info);
3333 
3334 	if (timer_pending(&local->passive_scan_timer))
3335 		del_timer(&local->passive_scan_timer);
3336 
3337 	if (timer_pending(&local->tick_timer))
3338 		del_timer(&local->tick_timer);
3339 
3340 	prism2_clear_cmd_queue(local);
3341 
3342 	skb_queue_purge(&local->info_list);
3343 	skb_queue_purge(&local->rx_list);
3344 	skb_queue_purge(&local->sta_tx_exc_list);
3345 
3346 	if (local->dev_enabled)
3347 		prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3348 
3349 	if (local->ap != NULL)
3350 		hostap_free_data(local->ap);
3351 
3352 #ifndef PRISM2_NO_PROCFS_DEBUG
3353 	if (local->proc != NULL)
3354 		remove_proc_entry("registers", local->proc);
3355 #endif /* PRISM2_NO_PROCFS_DEBUG */
3356 	hostap_remove_proc(local);
3357 
3358 	tx_cb = local->tx_callback;
3359 	while (tx_cb != NULL) {
3360 		tx_cb_prev = tx_cb;
3361 		tx_cb = tx_cb->next;
3362 		kfree(tx_cb_prev);
3363 	}
3364 
3365 	hostap_set_hostapd(local, 0, 0);
3366 	hostap_set_hostapd_sta(local, 0, 0);
3367 
3368 	for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3369 		if (local->frag_cache[i].skb != NULL)
3370 			dev_kfree_skb(local->frag_cache[i].skb);
3371 	}
3372 
3373 #ifdef PRISM2_DOWNLOAD_SUPPORT
3374 	prism2_download_free_data(local->dl_pri);
3375 	prism2_download_free_data(local->dl_sec);
3376 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3377 
3378 	prism2_clear_set_tim_queue(local);
3379 
3380 	list_for_each_safe(ptr, n, &local->bss_list) {
3381 		struct hostap_bss_info *bss =
3382 			list_entry(ptr, struct hostap_bss_info, list);
3383 		kfree(bss);
3384 	}
3385 
3386 	kfree(local->pda);
3387 	kfree(local->last_scan_results);
3388 	kfree(local->generic_elem);
3389 
3390 	free_netdev(local->dev);
3391 }
3392 
3393 
3394 #if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3395 static void prism2_suspend(struct net_device *dev)
3396 {
3397 	struct hostap_interface *iface;
3398 	struct local_info *local;
3399 	union iwreq_data wrqu;
3400 
3401 	iface = netdev_priv(dev);
3402 	local = iface->local;
3403 
3404 	/* Send disconnect event, e.g., to trigger reassociation after resume
3405 	 * if wpa_supplicant is used. */
3406 	memset(&wrqu, 0, sizeof(wrqu));
3407 	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3408 	wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3409 
3410 	/* Disable hardware and firmware */
3411 	prism2_hw_shutdown(dev, 0);
3412 }
3413 #endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3414 
3415 
3416 /* These might at some point be compiled separately and used as separate
3417  * kernel modules or linked into one */
3418 #ifdef PRISM2_DOWNLOAD_SUPPORT
3419 #include "hostap_download.c"
3420 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3421 
3422 #ifdef PRISM2_CALLBACK
3423 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3424  * This can use platform specific code and must define prism2_callback()
3425  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3426  * used. */
3427 #include "hostap_callback.c"
3428 #endif /* PRISM2_CALLBACK */
3429