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