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