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 struct list_head *ptr;
1407 prism2_check_sta_fw_version(local);
1408
1409 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1410 dev->dev_addr, 6, 1) < 0) {
1411 printk("%s: could not get own MAC address\n",
1412 dev->name);
1413 }
1414 list_for_each(ptr, &local->hostap_interfaces) {
1415 iface = list_entry(ptr, struct hostap_interface, list);
1416 eth_hw_addr_inherit(iface->dev, dev);
1417 }
1418 } else if (local->fw_ap)
1419 prism2_check_sta_fw_version(local);
1420
1421 prism2_setup_rids(dev);
1422
1423 /* MAC is now configured, but port 0 is not yet enabled */
1424 return 0;
1425
1426 failed:
1427 if (!local->no_pri)
1428 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1429 return 1;
1430 }
1431
1432
prism2_hw_enable(struct net_device * dev,int initial)1433 static int prism2_hw_enable(struct net_device *dev, int initial)
1434 {
1435 struct hostap_interface *iface;
1436 local_info_t *local;
1437 int was_resetting;
1438
1439 iface = netdev_priv(dev);
1440 local = iface->local;
1441 was_resetting = local->hw_resetting;
1442
1443 if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1444 printk("%s: MAC port 0 enabling failed\n", dev->name);
1445 return 1;
1446 }
1447
1448 local->hw_ready = 1;
1449 local->hw_reset_tries = 0;
1450 local->hw_resetting = 0;
1451 hfa384x_enable_interrupts(dev);
1452
1453 /* at least D-Link DWL-650 seems to require additional port reset
1454 * before it starts acting as an AP, so reset port automatically
1455 * here just in case */
1456 if (initial && prism2_reset_port(dev)) {
1457 printk("%s: MAC port 0 resetting failed\n", dev->name);
1458 return 1;
1459 }
1460
1461 if (was_resetting && netif_queue_stopped(dev)) {
1462 /* If hw_reset() was called during pending transmit, netif
1463 * queue was stopped. Wake it up now since the wlan card has
1464 * been resetted. */
1465 netif_wake_queue(dev);
1466 }
1467
1468 return 0;
1469 }
1470
1471
prism2_hw_config(struct net_device * dev,int initial)1472 static int prism2_hw_config(struct net_device *dev, int initial)
1473 {
1474 struct hostap_interface *iface;
1475 local_info_t *local;
1476
1477 iface = netdev_priv(dev);
1478 local = iface->local;
1479
1480 if (local->hw_downloading)
1481 return 1;
1482
1483 if (prism2_hw_init(dev, initial)) {
1484 return local->no_pri ? 0 : 1;
1485 }
1486
1487 if (prism2_hw_init2(dev, initial))
1488 return 1;
1489
1490 /* Enable firmware if secondary image is loaded and at least one of the
1491 * netdevices is up. */
1492 if (!local->pri_only &&
1493 (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1494 if (!local->dev_enabled)
1495 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1496 local->dev_enabled = 1;
1497 return prism2_hw_enable(dev, initial);
1498 }
1499
1500 return 0;
1501 }
1502
1503
prism2_hw_shutdown(struct net_device * dev,int no_disable)1504 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1505 {
1506 struct hostap_interface *iface;
1507 local_info_t *local;
1508
1509 iface = netdev_priv(dev);
1510 local = iface->local;
1511
1512 /* Allow only command completion events during disable */
1513 hfa384x_events_only_cmd(dev);
1514
1515 local->hw_ready = 0;
1516 if (local->dev_enabled)
1517 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1518 local->dev_enabled = 0;
1519
1520 if (local->func->card_present && !local->func->card_present(local)) {
1521 printk(KERN_DEBUG "%s: card already removed or not configured "
1522 "during shutdown\n", dev->name);
1523 return;
1524 }
1525
1526 if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1527 hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1528 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1529
1530 hfa384x_disable_interrupts(dev);
1531
1532 if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1533 hfa384x_events_only_cmd(dev);
1534 else
1535 prism2_clear_cmd_queue(local);
1536 }
1537
1538
prism2_hw_reset(struct net_device * dev)1539 static void prism2_hw_reset(struct net_device *dev)
1540 {
1541 struct hostap_interface *iface;
1542 local_info_t *local;
1543
1544 #if 0
1545 static long last_reset = 0;
1546
1547 /* do not reset card more than once per second to avoid ending up in a
1548 * busy loop resetting the card */
1549 if (time_before_eq(jiffies, last_reset + HZ))
1550 return;
1551 last_reset = jiffies;
1552 #endif
1553
1554 iface = netdev_priv(dev);
1555 local = iface->local;
1556
1557 if (local->hw_downloading)
1558 return;
1559
1560 if (local->hw_resetting) {
1561 printk(KERN_WARNING "%s: %s: already resetting card - "
1562 "ignoring reset request\n", dev_info, dev->name);
1563 return;
1564 }
1565
1566 local->hw_reset_tries++;
1567 if (local->hw_reset_tries > 10) {
1568 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1569 dev->name);
1570 return;
1571 }
1572
1573 printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1574 hfa384x_disable_interrupts(dev);
1575 local->hw_resetting = 1;
1576 if (local->func->cor_sreset) {
1577 /* Host system seems to hang in some cases with high traffic
1578 * load or shared interrupts during COR sreset. Disable shared
1579 * interrupts during reset to avoid these crashes. COS sreset
1580 * takes quite a long time, so it is unfortunate that this
1581 * seems to be needed. Anyway, I do not know of any better way
1582 * of avoiding the crash. */
1583 disable_irq(dev->irq);
1584 local->func->cor_sreset(local);
1585 enable_irq(dev->irq);
1586 }
1587 prism2_hw_shutdown(dev, 1);
1588 prism2_hw_config(dev, 0);
1589 local->hw_resetting = 0;
1590
1591 #ifdef PRISM2_DOWNLOAD_SUPPORT
1592 if (local->dl_pri) {
1593 printk(KERN_DEBUG "%s: persistent download of primary "
1594 "firmware\n", dev->name);
1595 if (prism2_download_genesis(local, local->dl_pri) < 0)
1596 printk(KERN_WARNING "%s: download (PRI) failed\n",
1597 dev->name);
1598 }
1599
1600 if (local->dl_sec) {
1601 printk(KERN_DEBUG "%s: persistent download of secondary "
1602 "firmware\n", dev->name);
1603 if (prism2_download_volatile(local, local->dl_sec) < 0)
1604 printk(KERN_WARNING "%s: download (SEC) failed\n",
1605 dev->name);
1606 }
1607 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1608
1609 /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1610 }
1611
1612
prism2_schedule_reset(local_info_t * local)1613 static void prism2_schedule_reset(local_info_t *local)
1614 {
1615 schedule_work(&local->reset_queue);
1616 }
1617
1618
1619 /* Called only as scheduled task after noticing card timeout in interrupt
1620 * context */
handle_reset_queue(struct work_struct * work)1621 static void handle_reset_queue(struct work_struct *work)
1622 {
1623 local_info_t *local = container_of(work, local_info_t, reset_queue);
1624
1625 printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1626 prism2_hw_reset(local->dev);
1627
1628 if (netif_queue_stopped(local->dev)) {
1629 int i;
1630
1631 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1632 if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1633 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1634 "wake up queue\n");
1635 netif_wake_queue(local->dev);
1636 break;
1637 }
1638 }
1639 }
1640
1641
prism2_get_txfid_idx(local_info_t * local)1642 static int prism2_get_txfid_idx(local_info_t *local)
1643 {
1644 int idx, end;
1645 unsigned long flags;
1646
1647 spin_lock_irqsave(&local->txfidlock, flags);
1648 end = idx = local->next_txfid;
1649 do {
1650 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1651 local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1652 spin_unlock_irqrestore(&local->txfidlock, flags);
1653 return idx;
1654 }
1655 idx++;
1656 if (idx >= PRISM2_TXFID_COUNT)
1657 idx = 0;
1658 } while (idx != end);
1659 spin_unlock_irqrestore(&local->txfidlock, flags);
1660
1661 PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1662 "packet dropped\n");
1663 local->dev->stats.tx_dropped++;
1664
1665 return -1;
1666 }
1667
1668
1669 /* Called only from hardware IRQ */
prism2_transmit_cb(struct net_device * dev,long context,u16 resp0,u16 res)1670 static void prism2_transmit_cb(struct net_device *dev, long context,
1671 u16 resp0, u16 res)
1672 {
1673 struct hostap_interface *iface;
1674 local_info_t *local;
1675 int idx = (int) context;
1676
1677 iface = netdev_priv(dev);
1678 local = iface->local;
1679
1680 if (res) {
1681 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1682 dev->name, res);
1683 return;
1684 }
1685
1686 if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1687 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1688 "idx=%d\n", dev->name, idx);
1689 return;
1690 }
1691
1692 if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1693 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1694 "with no pending transmit\n", dev->name);
1695 }
1696
1697 if (netif_queue_stopped(dev)) {
1698 /* ready for next TX, so wake up queue that was stopped in
1699 * prism2_transmit() */
1700 netif_wake_queue(dev);
1701 }
1702
1703 spin_lock(&local->txfidlock);
1704
1705 /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1706 * will be automatically allocated for the next TX frame */
1707 local->intransmitfid[idx] = resp0;
1708
1709 PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1710 "resp0=0x%04x, transmit_txfid=0x%04x\n",
1711 dev->name, idx, local->txfid[idx],
1712 resp0, local->intransmitfid[local->next_txfid]);
1713
1714 idx++;
1715 if (idx >= PRISM2_TXFID_COUNT)
1716 idx = 0;
1717 local->next_txfid = idx;
1718
1719 /* check if all TX buffers are occupied */
1720 do {
1721 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1722 spin_unlock(&local->txfidlock);
1723 return;
1724 }
1725 idx++;
1726 if (idx >= PRISM2_TXFID_COUNT)
1727 idx = 0;
1728 } while (idx != local->next_txfid);
1729 spin_unlock(&local->txfidlock);
1730
1731 /* no empty TX buffers, stop queue */
1732 netif_stop_queue(dev);
1733 }
1734
1735
1736 /* Called only from software IRQ if PCI bus master is not used (with bus master
1737 * this can be called both from software and hardware IRQ) */
prism2_transmit(struct net_device * dev,int idx)1738 static int prism2_transmit(struct net_device *dev, int idx)
1739 {
1740 struct hostap_interface *iface;
1741 local_info_t *local;
1742 int res;
1743
1744 iface = netdev_priv(dev);
1745 local = iface->local;
1746
1747 /* The driver tries to stop netif queue so that there would not be
1748 * more than one attempt to transmit frames going on; check that this
1749 * is really the case */
1750
1751 if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1752 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1753 "when previous TX was pending\n", dev->name);
1754 return -1;
1755 }
1756
1757 /* stop the queue for the time that transmit is pending */
1758 netif_stop_queue(dev);
1759
1760 /* transmit packet */
1761 res = hfa384x_cmd_callback(
1762 dev,
1763 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1764 local->txfid[idx],
1765 prism2_transmit_cb, (long) idx);
1766
1767 if (res) {
1768 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1769 "failed (res=%d)\n", dev->name, res);
1770 dev->stats.tx_dropped++;
1771 netif_wake_queue(dev);
1772 return -1;
1773 }
1774 netif_trans_update(dev);
1775
1776 /* Since we did not wait for command completion, the card continues
1777 * to process on the background and we will finish handling when
1778 * command completion event is handled (prism2_cmd_ev() function) */
1779
1780 return 0;
1781 }
1782
1783
1784 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1785 * send the payload with this descriptor) */
1786 /* Called only from software IRQ */
prism2_tx_80211(struct sk_buff * skb,struct net_device * dev)1787 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1788 {
1789 struct hostap_interface *iface;
1790 local_info_t *local;
1791 struct hfa384x_tx_frame txdesc;
1792 struct hostap_skb_tx_data *meta;
1793 int hdr_len, data_len, idx, res, ret = -1;
1794 u16 tx_control;
1795
1796 iface = netdev_priv(dev);
1797 local = iface->local;
1798
1799 meta = (struct hostap_skb_tx_data *) skb->cb;
1800
1801 prism2_callback(local, PRISM2_CALLBACK_TX_START);
1802
1803 if ((local->func->card_present && !local->func->card_present(local)) ||
1804 !local->hw_ready || local->hw_downloading || local->pri_only) {
1805 if (net_ratelimit()) {
1806 printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1807 " skipping\n", dev->name);
1808 }
1809 goto fail;
1810 }
1811
1812 memset(&txdesc, 0, sizeof(txdesc));
1813
1814 /* skb->data starts with txdesc->frame_control */
1815 hdr_len = 24;
1816 skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1817 if (ieee80211_is_data(txdesc.frame_control) &&
1818 ieee80211_has_a4(txdesc.frame_control) &&
1819 skb->len >= 30) {
1820 /* Addr4 */
1821 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1822 ETH_ALEN);
1823 hdr_len += ETH_ALEN;
1824 }
1825
1826 tx_control = local->tx_control;
1827 if (meta->tx_cb_idx) {
1828 tx_control |= HFA384X_TX_CTRL_TX_OK;
1829 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1830 }
1831 txdesc.tx_control = cpu_to_le16(tx_control);
1832 txdesc.tx_rate = meta->rate;
1833
1834 data_len = skb->len - hdr_len;
1835 txdesc.data_len = cpu_to_le16(data_len);
1836 txdesc.len = cpu_to_be16(data_len);
1837
1838 idx = prism2_get_txfid_idx(local);
1839 if (idx < 0)
1840 goto fail;
1841
1842 if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1843 hostap_dump_tx_header(dev->name, &txdesc);
1844
1845 spin_lock(&local->baplock);
1846 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1847
1848 if (!res)
1849 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1850 if (!res)
1851 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1852 skb->len - hdr_len);
1853 spin_unlock(&local->baplock);
1854
1855 if (!res)
1856 res = prism2_transmit(dev, idx);
1857 if (res) {
1858 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1859 dev->name);
1860 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1861 schedule_work(&local->reset_queue);
1862 goto fail;
1863 }
1864
1865 ret = 0;
1866
1867 fail:
1868 prism2_callback(local, PRISM2_CALLBACK_TX_END);
1869 return ret;
1870 }
1871
1872
1873 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1874 * register has changed values between consecutive reads for an unknown reason.
1875 * This should really not happen, so more debugging is needed. This test
1876 * version is a bit slower, but it will detect most of such register changes
1877 * and will try to get the correct fid eventually. */
1878 #define EXTRA_FID_READ_TESTS
1879
prism2_read_fid_reg(struct net_device * dev,u16 reg)1880 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1881 {
1882 #ifdef EXTRA_FID_READ_TESTS
1883 u16 val, val2, val3;
1884 int i;
1885
1886 for (i = 0; i < 10; i++) {
1887 val = HFA384X_INW(reg);
1888 val2 = HFA384X_INW(reg);
1889 val3 = HFA384X_INW(reg);
1890
1891 if (val == val2 && val == val3)
1892 return val;
1893
1894 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1895 " %04x %04x %04x\n",
1896 dev->name, i, reg, val, val2, val3);
1897 if ((val == val2 || val == val3) && val != 0)
1898 return val;
1899 if (val2 == val3 && val2 != 0)
1900 return val2;
1901 }
1902 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1903 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1904 return val;
1905 #else /* EXTRA_FID_READ_TESTS */
1906 return HFA384X_INW(reg);
1907 #endif /* EXTRA_FID_READ_TESTS */
1908 }
1909
1910
1911 /* Called only as a tasklet (software IRQ) */
prism2_rx(local_info_t * local)1912 static void prism2_rx(local_info_t *local)
1913 {
1914 struct net_device *dev = local->dev;
1915 int res, rx_pending = 0;
1916 u16 len, hdr_len, rxfid, status, macport;
1917 struct hfa384x_rx_frame rxdesc;
1918 struct sk_buff *skb = NULL;
1919
1920 prism2_callback(local, PRISM2_CALLBACK_RX_START);
1921
1922 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1923 #ifndef final_version
1924 if (rxfid == 0) {
1925 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1926 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1927 rxfid);
1928 if (rxfid == 0) {
1929 schedule_work(&local->reset_queue);
1930 goto rx_dropped;
1931 }
1932 /* try to continue with the new rxfid value */
1933 }
1934 #endif
1935
1936 spin_lock(&local->baplock);
1937 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1938 if (!res)
1939 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1940
1941 if (res) {
1942 spin_unlock(&local->baplock);
1943 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1944 res);
1945 if (res == -ETIMEDOUT) {
1946 schedule_work(&local->reset_queue);
1947 }
1948 goto rx_dropped;
1949 }
1950
1951 len = le16_to_cpu(rxdesc.data_len);
1952 hdr_len = sizeof(rxdesc);
1953 status = le16_to_cpu(rxdesc.status);
1954 macport = (status >> 8) & 0x07;
1955
1956 /* Drop frames with too large reported payload length. Monitor mode
1957 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1958 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1959 * macport 7 */
1960 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1961 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1962 if (len >= (u16) -14) {
1963 hdr_len -= 65535 - len;
1964 hdr_len--;
1965 }
1966 len = 0;
1967 } else {
1968 spin_unlock(&local->baplock);
1969 printk(KERN_DEBUG "%s: Received frame with invalid "
1970 "length 0x%04x\n", dev->name, len);
1971 hostap_dump_rx_header(dev->name, &rxdesc);
1972 goto rx_dropped;
1973 }
1974 }
1975
1976 skb = dev_alloc_skb(len + hdr_len);
1977 if (!skb) {
1978 spin_unlock(&local->baplock);
1979 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1980 dev->name);
1981 goto rx_dropped;
1982 }
1983 skb->dev = dev;
1984 skb_put_data(skb, &rxdesc, hdr_len);
1985
1986 if (len > 0)
1987 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
1988 spin_unlock(&local->baplock);
1989 if (res) {
1990 printk(KERN_DEBUG "%s: RX failed to read "
1991 "frame data\n", dev->name);
1992 goto rx_dropped;
1993 }
1994
1995 skb_queue_tail(&local->rx_list, skb);
1996 tasklet_schedule(&local->rx_tasklet);
1997
1998 rx_exit:
1999 prism2_callback(local, PRISM2_CALLBACK_RX_END);
2000 if (!rx_pending) {
2001 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2002 }
2003
2004 return;
2005
2006 rx_dropped:
2007 dev->stats.rx_dropped++;
2008 if (skb)
2009 dev_kfree_skb(skb);
2010 goto rx_exit;
2011 }
2012
2013
2014 /* Called only as a tasklet (software IRQ) */
hostap_rx_skb(local_info_t * local,struct sk_buff * skb)2015 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2016 {
2017 struct hfa384x_rx_frame *rxdesc;
2018 struct net_device *dev = skb->dev;
2019 struct hostap_80211_rx_status stats;
2020 int hdrlen, rx_hdrlen;
2021
2022 rx_hdrlen = sizeof(*rxdesc);
2023 if (skb->len < sizeof(*rxdesc)) {
2024 /* Allow monitor mode to receive shorter frames */
2025 if (local->iw_mode == IW_MODE_MONITOR &&
2026 skb->len >= sizeof(*rxdesc) - 30) {
2027 rx_hdrlen = skb->len;
2028 } else {
2029 dev_kfree_skb(skb);
2030 return;
2031 }
2032 }
2033
2034 rxdesc = (struct hfa384x_rx_frame *) skb->data;
2035
2036 if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2037 skb->len >= sizeof(*rxdesc))
2038 hostap_dump_rx_header(dev->name, rxdesc);
2039
2040 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2041 (!local->monitor_allow_fcserr ||
2042 local->iw_mode != IW_MODE_MONITOR))
2043 goto drop;
2044
2045 if (skb->len > PRISM2_DATA_MAXLEN) {
2046 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2047 dev->name, skb->len, PRISM2_DATA_MAXLEN);
2048 goto drop;
2049 }
2050
2051 stats.mac_time = le32_to_cpu(rxdesc->time);
2052 stats.signal = rxdesc->signal - local->rssi_to_dBm;
2053 stats.noise = rxdesc->silence - local->rssi_to_dBm;
2054 stats.rate = rxdesc->rate;
2055
2056 /* Convert Prism2 RX structure into IEEE 802.11 header */
2057 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2058 if (hdrlen > rx_hdrlen)
2059 hdrlen = rx_hdrlen;
2060
2061 memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2062 &rxdesc->frame_control, hdrlen);
2063
2064 hostap_80211_rx(dev, skb, &stats);
2065 return;
2066
2067 drop:
2068 dev_kfree_skb(skb);
2069 }
2070
2071
2072 /* Called only as a tasklet (software IRQ) */
hostap_rx_tasklet(struct tasklet_struct * t)2073 static void hostap_rx_tasklet(struct tasklet_struct *t)
2074 {
2075 local_info_t *local = from_tasklet(local, t, rx_tasklet);
2076 struct sk_buff *skb;
2077
2078 while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2079 hostap_rx_skb(local, skb);
2080 }
2081
2082
2083 /* Called only from hardware IRQ */
prism2_alloc_ev(struct net_device * dev)2084 static void prism2_alloc_ev(struct net_device *dev)
2085 {
2086 struct hostap_interface *iface;
2087 local_info_t *local;
2088 int idx;
2089 u16 fid;
2090
2091 iface = netdev_priv(dev);
2092 local = iface->local;
2093
2094 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2095
2096 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2097
2098 spin_lock(&local->txfidlock);
2099 idx = local->next_alloc;
2100
2101 do {
2102 if (local->txfid[idx] == fid) {
2103 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2104 idx);
2105
2106 #ifndef final_version
2107 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2108 printk("Already released txfid found at idx "
2109 "%d\n", idx);
2110 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2111 printk("Already reserved txfid found at idx "
2112 "%d\n", idx);
2113 #endif
2114 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2115 idx++;
2116 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2117 idx;
2118
2119 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2120 netif_queue_stopped(dev))
2121 netif_wake_queue(dev);
2122
2123 spin_unlock(&local->txfidlock);
2124 return;
2125 }
2126
2127 idx++;
2128 if (idx >= PRISM2_TXFID_COUNT)
2129 idx = 0;
2130 } while (idx != local->next_alloc);
2131
2132 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2133 "read 0x%04x) for alloc event\n", dev->name, fid,
2134 HFA384X_INW(HFA384X_ALLOCFID_OFF));
2135 printk(KERN_DEBUG "TXFIDs:");
2136 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2137 printk(" %04x[%04x]", local->txfid[idx],
2138 local->intransmitfid[idx]);
2139 printk("\n");
2140 spin_unlock(&local->txfidlock);
2141
2142 /* FIX: should probably schedule reset; reference to one txfid was lost
2143 * completely.. Bad things will happen if we run out of txfids
2144 * Actually, this will cause netdev watchdog to notice TX timeout and
2145 * then card reset after all txfids have been leaked. */
2146 }
2147
2148
2149 /* Called only as a tasklet (software IRQ) */
hostap_tx_callback(local_info_t * local,struct hfa384x_tx_frame * txdesc,int ok,char * payload)2150 static void hostap_tx_callback(local_info_t *local,
2151 struct hfa384x_tx_frame *txdesc, int ok,
2152 char *payload)
2153 {
2154 u16 sw_support, hdrlen, len;
2155 struct sk_buff *skb;
2156 struct hostap_tx_callback_info *cb;
2157
2158 /* Make sure that frame was from us. */
2159 if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2160 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2161 local->dev->name);
2162 return;
2163 }
2164
2165 sw_support = le32_to_cpu(txdesc->sw_support);
2166
2167 spin_lock(&local->lock);
2168 cb = local->tx_callback;
2169 while (cb != NULL && cb->idx != sw_support)
2170 cb = cb->next;
2171 spin_unlock(&local->lock);
2172
2173 if (cb == NULL) {
2174 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2175 local->dev->name, sw_support);
2176 return;
2177 }
2178
2179 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2180 len = le16_to_cpu(txdesc->data_len);
2181 skb = dev_alloc_skb(hdrlen + len);
2182 if (skb == NULL) {
2183 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2184 "skb\n", local->dev->name);
2185 return;
2186 }
2187
2188 skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2189 if (payload)
2190 skb_put_data(skb, payload, len);
2191
2192 skb->dev = local->dev;
2193 skb_reset_mac_header(skb);
2194
2195 cb->func(skb, ok, cb->data);
2196 }
2197
2198
2199 /* Called only as a tasklet (software IRQ) */
hostap_tx_compl_read(local_info_t * local,int error,struct hfa384x_tx_frame * txdesc,char ** payload)2200 static int hostap_tx_compl_read(local_info_t *local, int error,
2201 struct hfa384x_tx_frame *txdesc,
2202 char **payload)
2203 {
2204 u16 fid, len;
2205 int res, ret = 0;
2206 struct net_device *dev = local->dev;
2207
2208 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2209
2210 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2211
2212 spin_lock(&local->baplock);
2213 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2214 if (!res)
2215 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2216 if (res) {
2217 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2218 "read txdesc\n", dev->name, error, fid);
2219 if (res == -ETIMEDOUT) {
2220 schedule_work(&local->reset_queue);
2221 }
2222 ret = -1;
2223 goto fail;
2224 }
2225 if (txdesc->sw_support) {
2226 len = le16_to_cpu(txdesc->data_len);
2227 if (len < PRISM2_DATA_MAXLEN) {
2228 *payload = kmalloc(len, GFP_ATOMIC);
2229 if (*payload == NULL ||
2230 hfa384x_from_bap(dev, BAP0, *payload, len)) {
2231 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2232 "frame payload\n", dev->name);
2233 kfree(*payload);
2234 *payload = NULL;
2235 ret = -1;
2236 goto fail;
2237 }
2238 }
2239 }
2240
2241 fail:
2242 spin_unlock(&local->baplock);
2243
2244 return ret;
2245 }
2246
2247
2248 /* Called only as a tasklet (software IRQ) */
prism2_tx_ev(local_info_t * local)2249 static void prism2_tx_ev(local_info_t *local)
2250 {
2251 struct net_device *dev = local->dev;
2252 char *payload = NULL;
2253 struct hfa384x_tx_frame txdesc;
2254
2255 if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2256 goto fail;
2257
2258 if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2259 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2260 "retry_count=%d tx_rate=%d seq_ctrl=%d "
2261 "duration_id=%d\n",
2262 dev->name, le16_to_cpu(txdesc.status),
2263 txdesc.retry_count, txdesc.tx_rate,
2264 le16_to_cpu(txdesc.seq_ctrl),
2265 le16_to_cpu(txdesc.duration_id));
2266 }
2267
2268 if (txdesc.sw_support)
2269 hostap_tx_callback(local, &txdesc, 1, payload);
2270 kfree(payload);
2271
2272 fail:
2273 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2274 }
2275
2276
2277 /* Called only as a tasklet (software IRQ) */
hostap_sta_tx_exc_tasklet(struct tasklet_struct * t)2278 static void hostap_sta_tx_exc_tasklet(struct tasklet_struct *t)
2279 {
2280 local_info_t *local = from_tasklet(local, t, sta_tx_exc_tasklet);
2281 struct sk_buff *skb;
2282
2283 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2284 struct hfa384x_tx_frame *txdesc =
2285 (struct hfa384x_tx_frame *) skb->data;
2286
2287 if (skb->len >= sizeof(*txdesc)) {
2288 /* Convert Prism2 RX structure into IEEE 802.11 header
2289 */
2290 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2291 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2292 &txdesc->frame_control, hdrlen);
2293
2294 hostap_handle_sta_tx_exc(local, skb);
2295 }
2296 dev_kfree_skb(skb);
2297 }
2298 }
2299
2300
2301 /* Called only as a tasklet (software IRQ) */
prism2_txexc(local_info_t * local)2302 static void prism2_txexc(local_info_t *local)
2303 {
2304 struct net_device *dev = local->dev;
2305 u16 status, fc;
2306 int show_dump, res;
2307 char *payload = NULL;
2308 struct hfa384x_tx_frame txdesc;
2309
2310 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2311 dev->stats.tx_errors++;
2312
2313 res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2314 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2315 if (res)
2316 return;
2317
2318 status = le16_to_cpu(txdesc.status);
2319
2320 /* We produce a TXDROP event only for retry or lifetime
2321 * exceeded, because that's the only status that really mean
2322 * that this particular node went away.
2323 * Other errors means that *we* screwed up. - Jean II */
2324 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2325 {
2326 union iwreq_data wrqu;
2327
2328 /* Copy 802.11 dest address. */
2329 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2330 wrqu.addr.sa_family = ARPHRD_ETHER;
2331 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2332 } else
2333 show_dump = 1;
2334
2335 if (local->iw_mode == IW_MODE_MASTER ||
2336 local->iw_mode == IW_MODE_REPEAT ||
2337 local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2338 struct sk_buff *skb;
2339 skb = dev_alloc_skb(sizeof(txdesc));
2340 if (skb) {
2341 skb_put_data(skb, &txdesc, sizeof(txdesc));
2342 skb_queue_tail(&local->sta_tx_exc_list, skb);
2343 tasklet_schedule(&local->sta_tx_exc_tasklet);
2344 }
2345 }
2346
2347 if (txdesc.sw_support)
2348 hostap_tx_callback(local, &txdesc, 0, payload);
2349 kfree(payload);
2350
2351 if (!show_dump)
2352 return;
2353
2354 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2355 " tx_control=%04x\n",
2356 dev->name, status,
2357 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2358 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2359 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2360 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2361 le16_to_cpu(txdesc.tx_control));
2362
2363 fc = le16_to_cpu(txdesc.frame_control);
2364 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
2365 "(%s%s%s::%d%s%s)\n",
2366 txdesc.retry_count, txdesc.tx_rate, fc,
2367 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2368 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2369 ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2370 (fc & IEEE80211_FCTL_STYPE) >> 4,
2371 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2372 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2373 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n",
2374 txdesc.addr1, txdesc.addr2,
2375 txdesc.addr3, txdesc.addr4);
2376 }
2377
2378
2379 /* Called only as a tasklet (software IRQ) */
hostap_info_tasklet(struct tasklet_struct * t)2380 static void hostap_info_tasklet(struct tasklet_struct *t)
2381 {
2382 local_info_t *local = from_tasklet(local, t, info_tasklet);
2383 struct sk_buff *skb;
2384
2385 while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2386 hostap_info_process(local, skb);
2387 dev_kfree_skb(skb);
2388 }
2389 }
2390
2391
2392 /* Called only as a tasklet (software IRQ) */
prism2_info(local_info_t * local)2393 static void prism2_info(local_info_t *local)
2394 {
2395 struct net_device *dev = local->dev;
2396 u16 fid;
2397 int res, left;
2398 struct hfa384x_info_frame info;
2399 struct sk_buff *skb;
2400
2401 fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2402
2403 spin_lock(&local->baplock);
2404 res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2405 if (!res)
2406 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2407 if (res) {
2408 spin_unlock(&local->baplock);
2409 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2410 fid);
2411 if (res == -ETIMEDOUT) {
2412 schedule_work(&local->reset_queue);
2413 }
2414 goto out;
2415 }
2416
2417 left = (le16_to_cpu(info.len) - 1) * 2;
2418
2419 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2420 /* data register seems to give 0x8000 in some error cases even
2421 * though busy bit is not set in offset register;
2422 * in addition, length must be at least 1 due to type field */
2423 spin_unlock(&local->baplock);
2424 printk(KERN_DEBUG "%s: Received info frame with invalid "
2425 "length 0x%04x (type 0x%04x)\n", dev->name,
2426 le16_to_cpu(info.len), le16_to_cpu(info.type));
2427 goto out;
2428 }
2429
2430 skb = dev_alloc_skb(sizeof(info) + left);
2431 if (skb == NULL) {
2432 spin_unlock(&local->baplock);
2433 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2434 "frame\n", dev->name);
2435 goto out;
2436 }
2437
2438 skb_put_data(skb, &info, sizeof(info));
2439 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2440 {
2441 spin_unlock(&local->baplock);
2442 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2443 "len=0x%04x, type=0x%04x\n", dev->name, fid,
2444 le16_to_cpu(info.len), le16_to_cpu(info.type));
2445 dev_kfree_skb(skb);
2446 goto out;
2447 }
2448 spin_unlock(&local->baplock);
2449
2450 skb_queue_tail(&local->info_list, skb);
2451 tasklet_schedule(&local->info_tasklet);
2452
2453 out:
2454 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2455 }
2456
2457
2458 /* Called only as a tasklet (software IRQ) */
hostap_bap_tasklet(struct tasklet_struct * t)2459 static void hostap_bap_tasklet(struct tasklet_struct *t)
2460 {
2461 local_info_t *local = from_tasklet(local, t, bap_tasklet);
2462 struct net_device *dev = local->dev;
2463 u16 ev;
2464 int frames = 30;
2465
2466 if (local->func->card_present && !local->func->card_present(local))
2467 return;
2468
2469 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2470
2471 /* Process all pending BAP events without generating new interrupts
2472 * for them */
2473 while (frames-- > 0) {
2474 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2475 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2476 break;
2477 if (ev & HFA384X_EV_RX)
2478 prism2_rx(local);
2479 if (ev & HFA384X_EV_INFO)
2480 prism2_info(local);
2481 if (ev & HFA384X_EV_TX)
2482 prism2_tx_ev(local);
2483 if (ev & HFA384X_EV_TXEXC)
2484 prism2_txexc(local);
2485 }
2486
2487 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2488 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2489
2490 /* Enable interrupts for new BAP events */
2491 hfa384x_events_all(dev);
2492 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2493 }
2494
2495
2496 /* Called only from hardware IRQ */
prism2_infdrop(struct net_device * dev)2497 static void prism2_infdrop(struct net_device *dev)
2498 {
2499 static unsigned long last_inquire = 0;
2500
2501 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2502
2503 /* some firmware versions seem to get stuck with
2504 * full CommTallies in high traffic load cases; every
2505 * packet will then cause INFDROP event and CommTallies
2506 * info frame will not be sent automatically. Try to
2507 * get out of this state by inquiring CommTallies. */
2508 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2509 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2510 HFA384X_INFO_COMMTALLIES, NULL, 0);
2511 last_inquire = jiffies;
2512 }
2513 }
2514
2515
2516 /* Called only from hardware IRQ */
prism2_ev_tick(struct net_device * dev)2517 static void prism2_ev_tick(struct net_device *dev)
2518 {
2519 struct hostap_interface *iface;
2520 local_info_t *local;
2521 u16 evstat, inten;
2522 static int prev_stuck = 0;
2523
2524 iface = netdev_priv(dev);
2525 local = iface->local;
2526
2527 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2528 local->last_tick_timer) {
2529 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2530 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2531 if (!prev_stuck) {
2532 printk(KERN_INFO "%s: SW TICK stuck? "
2533 "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2534 dev->name, local->bits, evstat, inten);
2535 }
2536 local->sw_tick_stuck++;
2537 if ((evstat & HFA384X_BAP0_EVENTS) &&
2538 (inten & HFA384X_BAP0_EVENTS)) {
2539 printk(KERN_INFO "%s: trying to recover from IRQ "
2540 "hang\n", dev->name);
2541 hfa384x_events_no_bap0(dev);
2542 }
2543 prev_stuck = 1;
2544 } else
2545 prev_stuck = 0;
2546 }
2547
2548
2549 /* Called only from hardware IRQ */
prism2_check_magic(local_info_t * local)2550 static void prism2_check_magic(local_info_t *local)
2551 {
2552 /* at least PCI Prism2.5 with bus mastering seems to sometimes
2553 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2554 * register once or twice seems to get the correct value.. PCI cards
2555 * cannot anyway be removed during normal operation, so there is not
2556 * really any need for this verification with them. */
2557
2558 #ifndef PRISM2_PCI
2559 #ifndef final_version
2560 static unsigned long last_magic_err = 0;
2561 struct net_device *dev = local->dev;
2562
2563 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2564 if (!local->hw_ready)
2565 return;
2566 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2567 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2568 printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2569 "%04X != %04X - card removed?\n", dev->name,
2570 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2571 HFA384X_MAGIC);
2572 last_magic_err = jiffies;
2573 } else if (net_ratelimit()) {
2574 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2575 "MAGIC=%04x\n", dev->name,
2576 HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2577 HFA384X_MAGIC);
2578 }
2579 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2580 schedule_work(&local->reset_queue);
2581 return;
2582 }
2583 #endif /* final_version */
2584 #endif /* !PRISM2_PCI */
2585 }
2586
2587
2588 /* Called only from hardware IRQ */
prism2_interrupt(int irq,void * dev_id)2589 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2590 {
2591 struct net_device *dev = dev_id;
2592 struct hostap_interface *iface;
2593 local_info_t *local;
2594 int events = 0;
2595 u16 ev;
2596
2597 iface = netdev_priv(dev);
2598 local = iface->local;
2599
2600 /* Detect early interrupt before driver is fully configured */
2601 spin_lock(&local->irq_init_lock);
2602 if (!dev->base_addr) {
2603 if (net_ratelimit()) {
2604 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2605 dev->name);
2606 }
2607 spin_unlock(&local->irq_init_lock);
2608 return IRQ_HANDLED;
2609 }
2610 spin_unlock(&local->irq_init_lock);
2611
2612 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2613
2614 if (local->func->card_present && !local->func->card_present(local)) {
2615 if (net_ratelimit()) {
2616 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2617 dev->name);
2618 }
2619 return IRQ_HANDLED;
2620 }
2621
2622 prism2_check_magic(local);
2623
2624 for (;;) {
2625 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2626 if (ev == 0xffff) {
2627 if (local->shutdown)
2628 return IRQ_HANDLED;
2629 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2630 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2631 dev->name);
2632 return IRQ_HANDLED;
2633 }
2634
2635 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2636 if (ev == 0)
2637 break;
2638
2639 if (ev & HFA384X_EV_CMD) {
2640 prism2_cmd_ev(dev);
2641 }
2642
2643 /* Above events are needed even before hw is ready, but other
2644 * events should be skipped during initialization. This may
2645 * change for AllocEv if allocate_fid is implemented without
2646 * busy waiting. */
2647 if (!local->hw_ready || local->hw_resetting ||
2648 !local->dev_enabled) {
2649 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2650 if (ev & HFA384X_EV_CMD)
2651 goto next_event;
2652 if ((ev & HFA384X_EVENT_MASK) == 0)
2653 return IRQ_HANDLED;
2654 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2655 net_ratelimit()) {
2656 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2657 "not ready; skipping events 0x%04x "
2658 "(IntEn=0x%04x)%s%s%s\n",
2659 dev->name, ev,
2660 HFA384X_INW(HFA384X_INTEN_OFF),
2661 !local->hw_ready ? " (!hw_ready)" : "",
2662 local->hw_resetting ?
2663 " (hw_resetting)" : "",
2664 !local->dev_enabled ?
2665 " (!dev_enabled)" : "");
2666 }
2667 HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2668 return IRQ_HANDLED;
2669 }
2670
2671 if (ev & HFA384X_EV_TICK) {
2672 prism2_ev_tick(dev);
2673 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2674 }
2675
2676 if (ev & HFA384X_EV_ALLOC) {
2677 prism2_alloc_ev(dev);
2678 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2679 }
2680
2681 /* Reading data from the card is quite time consuming, so do it
2682 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2683 * and unmasked after needed data has been read completely. */
2684 if (ev & HFA384X_BAP0_EVENTS) {
2685 hfa384x_events_no_bap0(dev);
2686 tasklet_schedule(&local->bap_tasklet);
2687 }
2688
2689 #ifndef final_version
2690 if (ev & HFA384X_EV_WTERR) {
2691 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2692 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2693 }
2694 #endif /* final_version */
2695
2696 if (ev & HFA384X_EV_INFDROP) {
2697 prism2_infdrop(dev);
2698 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2699 }
2700
2701 next_event:
2702 events++;
2703 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2704 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2705 "(EvStat=0x%04x)\n",
2706 PRISM2_MAX_INTERRUPT_EVENTS,
2707 HFA384X_INW(HFA384X_EVSTAT_OFF));
2708 break;
2709 }
2710 }
2711 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2712 return IRQ_RETVAL(events);
2713 }
2714
2715
prism2_check_sta_fw_version(local_info_t * local)2716 static void prism2_check_sta_fw_version(local_info_t *local)
2717 {
2718 struct hfa384x_comp_ident comp;
2719 int id, variant, major, minor;
2720
2721 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2722 &comp, sizeof(comp), 1) < 0)
2723 return;
2724
2725 local->fw_ap = 0;
2726 id = le16_to_cpu(comp.id);
2727 if (id != HFA384X_COMP_ID_STA) {
2728 if (id == HFA384X_COMP_ID_FW_AP)
2729 local->fw_ap = 1;
2730 return;
2731 }
2732
2733 major = __le16_to_cpu(comp.major);
2734 minor = __le16_to_cpu(comp.minor);
2735 variant = __le16_to_cpu(comp.variant);
2736 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2737
2738 /* Station firmware versions before 1.4.x seem to have a bug in
2739 * firmware-based WEP encryption when using Host AP mode, so use
2740 * host_encrypt as a default for them. Firmware version 1.4.9 is the
2741 * first one that has been seen to produce correct encryption, but the
2742 * bug might be fixed before that (although, at least 1.4.2 is broken).
2743 */
2744 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2745
2746 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2747 !local->fw_encrypt_ok) {
2748 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2749 "a workaround for firmware bug in Host AP mode WEP\n",
2750 local->dev->name);
2751 local->host_encrypt = 1;
2752 }
2753
2754 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2755 * in station firmware versions before 1.5.x. With these versions, the
2756 * driver uses a workaround with bogus frame format (4th address after
2757 * the payload). This is not compatible with other AP devices. Since
2758 * the firmware bug is fixed in the latest station firmware versions,
2759 * automatically enable standard compliant mode for cards using station
2760 * firmware version 1.5.0 or newer. */
2761 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2762 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2763 else {
2764 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2765 "workaround for firmware bug in Host AP mode WDS\n",
2766 local->dev->name);
2767 }
2768
2769 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2770 }
2771
2772
hostap_passive_scan(struct timer_list * t)2773 static void hostap_passive_scan(struct timer_list *t)
2774 {
2775 local_info_t *local = from_timer(local, t, passive_scan_timer);
2776 struct net_device *dev = local->dev;
2777 u16 chan;
2778
2779 if (local->passive_scan_interval <= 0)
2780 return;
2781
2782 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2783 int max_tries = 16;
2784
2785 /* Even though host system does not really know when the WLAN
2786 * MAC is sending frames, try to avoid changing channels for
2787 * passive scanning when a host-generated frame is being
2788 * transmitted */
2789 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2790 printk(KERN_DEBUG "%s: passive scan detected pending "
2791 "TX - delaying\n", dev->name);
2792 local->passive_scan_timer.expires = jiffies + HZ / 10;
2793 add_timer(&local->passive_scan_timer);
2794 return;
2795 }
2796
2797 do {
2798 local->passive_scan_channel++;
2799 if (local->passive_scan_channel > 14)
2800 local->passive_scan_channel = 1;
2801 max_tries--;
2802 } while (!(local->channel_mask &
2803 (1 << (local->passive_scan_channel - 1))) &&
2804 max_tries > 0);
2805
2806 if (max_tries == 0) {
2807 printk(KERN_INFO "%s: no allowed passive scan channels"
2808 " found\n", dev->name);
2809 return;
2810 }
2811
2812 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2813 dev->name, local->passive_scan_channel);
2814 chan = local->passive_scan_channel;
2815 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2816 local->passive_scan_timer.expires = jiffies + HZ / 10;
2817 } else {
2818 chan = local->channel;
2819 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2820 local->passive_scan_timer.expires = jiffies +
2821 local->passive_scan_interval * HZ;
2822 }
2823
2824 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2825 (HFA384X_TEST_CHANGE_CHANNEL << 8),
2826 chan, NULL, 0))
2827 printk(KERN_ERR "%s: passive scan channel set %d "
2828 "failed\n", dev->name, chan);
2829
2830 add_timer(&local->passive_scan_timer);
2831 }
2832
2833
2834 /* Called only as a scheduled task when communications quality values should
2835 * be updated. */
handle_comms_qual_update(struct work_struct * work)2836 static void handle_comms_qual_update(struct work_struct *work)
2837 {
2838 local_info_t *local =
2839 container_of(work, local_info_t, comms_qual_update);
2840 prism2_update_comms_qual(local->dev);
2841 }
2842
2843
2844 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2845 * used to monitor that local->last_tick_timer is being updated. If not,
2846 * interrupt busy-loop is assumed and driver tries to recover by masking out
2847 * some events. */
hostap_tick_timer(struct timer_list * t)2848 static void hostap_tick_timer(struct timer_list *t)
2849 {
2850 static unsigned long last_inquire = 0;
2851 local_info_t *local = from_timer(local, t, tick_timer);
2852 local->last_tick_timer = jiffies;
2853
2854 /* Inquire CommTallies every 10 seconds to keep the statistics updated
2855 * more often during low load and when using 32-bit tallies. */
2856 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2857 !local->hw_downloading && local->hw_ready &&
2858 !local->hw_resetting && local->dev_enabled) {
2859 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2860 HFA384X_INFO_COMMTALLIES, NULL, 0);
2861 last_inquire = jiffies;
2862 }
2863
2864 if ((local->last_comms_qual_update == 0 ||
2865 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2866 (local->iw_mode == IW_MODE_INFRA ||
2867 local->iw_mode == IW_MODE_ADHOC)) {
2868 schedule_work(&local->comms_qual_update);
2869 }
2870
2871 local->tick_timer.expires = jiffies + 2 * HZ;
2872 add_timer(&local->tick_timer);
2873 }
2874
2875
2876 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
hfa384x_read_reg(struct net_device * dev,u16 reg)2877 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
2878 {
2879 return HFA384X_INW(reg);
2880 }
2881
prism2_registers_proc_show(struct seq_file * m,void * v)2882 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2883 {
2884 local_info_t *local = m->private;
2885
2886 #define SHOW_REG(n) \
2887 seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2888
2889 SHOW_REG(CMD);
2890 SHOW_REG(PARAM0);
2891 SHOW_REG(PARAM1);
2892 SHOW_REG(PARAM2);
2893 SHOW_REG(STATUS);
2894 SHOW_REG(RESP0);
2895 SHOW_REG(RESP1);
2896 SHOW_REG(RESP2);
2897 SHOW_REG(INFOFID);
2898 SHOW_REG(CONTROL);
2899 SHOW_REG(SELECT0);
2900 SHOW_REG(SELECT1);
2901 SHOW_REG(OFFSET0);
2902 SHOW_REG(OFFSET1);
2903 SHOW_REG(RXFID);
2904 SHOW_REG(ALLOCFID);
2905 SHOW_REG(TXCOMPLFID);
2906 SHOW_REG(SWSUPPORT0);
2907 SHOW_REG(SWSUPPORT1);
2908 SHOW_REG(SWSUPPORT2);
2909 SHOW_REG(EVSTAT);
2910 SHOW_REG(INTEN);
2911 SHOW_REG(EVACK);
2912 /* Do not read data registers, because they change the state of the
2913 * MAC (offset += 2) */
2914 /* SHOW_REG(DATA0); */
2915 /* SHOW_REG(DATA1); */
2916 SHOW_REG(AUXPAGE);
2917 SHOW_REG(AUXOFFSET);
2918 /* SHOW_REG(AUXDATA); */
2919 #ifdef PRISM2_PCI
2920 SHOW_REG(PCICOR);
2921 SHOW_REG(PCIHCR);
2922 SHOW_REG(PCI_M0_ADDRH);
2923 SHOW_REG(PCI_M0_ADDRL);
2924 SHOW_REG(PCI_M0_LEN);
2925 SHOW_REG(PCI_M0_CTL);
2926 SHOW_REG(PCI_STATUS);
2927 SHOW_REG(PCI_M1_ADDRH);
2928 SHOW_REG(PCI_M1_ADDRL);
2929 SHOW_REG(PCI_M1_LEN);
2930 SHOW_REG(PCI_M1_CTL);
2931 #endif /* PRISM2_PCI */
2932
2933 return 0;
2934 }
2935 #endif
2936
2937 struct set_tim_data {
2938 struct list_head list;
2939 int aid;
2940 int set;
2941 };
2942
prism2_set_tim(struct net_device * dev,int aid,int set)2943 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2944 {
2945 struct list_head *ptr;
2946 struct set_tim_data *new_entry;
2947 struct hostap_interface *iface;
2948 local_info_t *local;
2949
2950 iface = netdev_priv(dev);
2951 local = iface->local;
2952
2953 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2954 if (new_entry == NULL)
2955 return -ENOMEM;
2956
2957 new_entry->aid = aid;
2958 new_entry->set = set;
2959
2960 spin_lock_bh(&local->set_tim_lock);
2961 list_for_each(ptr, &local->set_tim_list) {
2962 struct set_tim_data *entry =
2963 list_entry(ptr, struct set_tim_data, list);
2964 if (entry->aid == aid) {
2965 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2966 "set=%d ==> %d\n",
2967 local->dev->name, aid, entry->set, set);
2968 entry->set = set;
2969 kfree(new_entry);
2970 new_entry = NULL;
2971 break;
2972 }
2973 }
2974 if (new_entry)
2975 list_add_tail(&new_entry->list, &local->set_tim_list);
2976 spin_unlock_bh(&local->set_tim_lock);
2977
2978 schedule_work(&local->set_tim_queue);
2979
2980 return 0;
2981 }
2982
2983
handle_set_tim_queue(struct work_struct * work)2984 static void handle_set_tim_queue(struct work_struct *work)
2985 {
2986 local_info_t *local = container_of(work, local_info_t, set_tim_queue);
2987 struct set_tim_data *entry;
2988 u16 val;
2989
2990 for (;;) {
2991 entry = NULL;
2992 spin_lock_bh(&local->set_tim_lock);
2993 if (!list_empty(&local->set_tim_list)) {
2994 entry = list_entry(local->set_tim_list.next,
2995 struct set_tim_data, list);
2996 list_del(&entry->list);
2997 }
2998 spin_unlock_bh(&local->set_tim_lock);
2999 if (!entry)
3000 break;
3001
3002 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3003 local->dev->name, entry->aid, entry->set);
3004
3005 val = entry->aid;
3006 if (entry->set)
3007 val |= 0x8000;
3008 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3009 printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3010 "set=%d)\n",
3011 local->dev->name, entry->aid, entry->set);
3012 }
3013
3014 kfree(entry);
3015 }
3016 }
3017
3018
prism2_clear_set_tim_queue(local_info_t * local)3019 static void prism2_clear_set_tim_queue(local_info_t *local)
3020 {
3021 struct list_head *ptr, *n;
3022
3023 list_for_each_safe(ptr, n, &local->set_tim_list) {
3024 struct set_tim_data *entry;
3025 entry = list_entry(ptr, struct set_tim_data, list);
3026 list_del(&entry->list);
3027 kfree(entry);
3028 }
3029 }
3030
3031
3032 /*
3033 * HostAP uses two layers of net devices, where the inner
3034 * layer gets called all the time from the outer layer.
3035 * This is a natural nesting, which needs a split lock type.
3036 */
3037 static struct lock_class_key hostap_netdev_xmit_lock_key;
3038 static struct lock_class_key hostap_netdev_addr_lock_key;
3039
prism2_set_lockdep_class_one(struct net_device * dev,struct netdev_queue * txq,void * _unused)3040 static void prism2_set_lockdep_class_one(struct net_device *dev,
3041 struct netdev_queue *txq,
3042 void *_unused)
3043 {
3044 lockdep_set_class(&txq->_xmit_lock,
3045 &hostap_netdev_xmit_lock_key);
3046 }
3047
prism2_set_lockdep_class(struct net_device * dev)3048 static void prism2_set_lockdep_class(struct net_device *dev)
3049 {
3050 lockdep_set_class(&dev->addr_list_lock,
3051 &hostap_netdev_addr_lock_key);
3052 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3053 }
3054
3055 static struct net_device *
prism2_init_local_data(struct prism2_helper_functions * funcs,int card_idx,struct device * sdev)3056 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3057 struct device *sdev)
3058 {
3059 struct net_device *dev;
3060 struct hostap_interface *iface;
3061 struct local_info *local;
3062 int len, i, ret;
3063
3064 if (funcs == NULL)
3065 return NULL;
3066
3067 len = strlen(dev_template);
3068 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3069 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3070 dev_template);
3071 return NULL;
3072 }
3073
3074 len = sizeof(struct hostap_interface) +
3075 3 + sizeof(struct local_info) +
3076 3 + sizeof(struct ap_data);
3077
3078 dev = alloc_etherdev(len);
3079 if (dev == NULL)
3080 return NULL;
3081
3082 iface = netdev_priv(dev);
3083 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3084 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3085 local->dev = iface->dev = dev;
3086 iface->local = local;
3087 iface->type = HOSTAP_INTERFACE_MASTER;
3088 INIT_LIST_HEAD(&local->hostap_interfaces);
3089
3090 local->hw_module = THIS_MODULE;
3091
3092 #ifdef PRISM2_IO_DEBUG
3093 local->io_debug_enabled = 1;
3094 #endif /* PRISM2_IO_DEBUG */
3095
3096 local->func = funcs;
3097 local->func->cmd = hfa384x_cmd;
3098 local->func->read_regs = hfa384x_read_regs;
3099 local->func->get_rid = hfa384x_get_rid;
3100 local->func->set_rid = hfa384x_set_rid;
3101 local->func->hw_enable = prism2_hw_enable;
3102 local->func->hw_config = prism2_hw_config;
3103 local->func->hw_reset = prism2_hw_reset;
3104 local->func->hw_shutdown = prism2_hw_shutdown;
3105 local->func->reset_port = prism2_reset_port;
3106 local->func->schedule_reset = prism2_schedule_reset;
3107 #ifdef PRISM2_DOWNLOAD_SUPPORT
3108 local->func->read_aux_proc_ops = &prism2_download_aux_dump_proc_ops;
3109 local->func->download = prism2_download;
3110 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3111 local->func->tx = prism2_tx_80211;
3112 local->func->set_tim = prism2_set_tim;
3113 local->func->need_tx_headroom = 0; /* no need to add txdesc in
3114 * skb->data (FIX: maybe for DMA bus
3115 * mastering? */
3116
3117 local->mtu = mtu;
3118
3119 rwlock_init(&local->iface_lock);
3120 spin_lock_init(&local->txfidlock);
3121 spin_lock_init(&local->cmdlock);
3122 spin_lock_init(&local->baplock);
3123 spin_lock_init(&local->lock);
3124 spin_lock_init(&local->irq_init_lock);
3125 mutex_init(&local->rid_bap_mtx);
3126
3127 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3128 card_idx = 0;
3129 local->card_idx = card_idx;
3130
3131 len = strlen(essid);
3132 memcpy(local->essid, essid,
3133 len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3134 local->essid[MAX_SSID_LEN] = '\0';
3135 i = GET_INT_PARM(iw_mode, card_idx);
3136 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3137 i == IW_MODE_MONITOR) {
3138 local->iw_mode = i;
3139 } else {
3140 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3141 "IW_MODE_MASTER\n", i);
3142 local->iw_mode = IW_MODE_MASTER;
3143 }
3144 local->channel = GET_INT_PARM(channel, card_idx);
3145 local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3146 local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3147 local->wds_max_connections = 16;
3148 local->tx_control = HFA384X_TX_CTRL_FLAGS;
3149 local->manual_retry_count = -1;
3150 local->rts_threshold = 2347;
3151 local->fragm_threshold = 2346;
3152 local->rssi_to_dBm = 100; /* default; to be overriden by
3153 * cnfDbmAdjust, if available */
3154 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3155 local->sram_type = -1;
3156 local->scan_channel_mask = 0xffff;
3157 local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3158
3159 /* Initialize task queue structures */
3160 INIT_WORK(&local->reset_queue, handle_reset_queue);
3161 INIT_WORK(&local->set_multicast_list_queue,
3162 hostap_set_multicast_list_queue);
3163
3164 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3165 INIT_LIST_HEAD(&local->set_tim_list);
3166 spin_lock_init(&local->set_tim_lock);
3167
3168 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3169
3170 /* Initialize tasklets for handling hardware IRQ related operations
3171 * outside hw IRQ handler */
3172 #define HOSTAP_TASKLET_INIT(q, f, d) \
3173 do { memset((q), 0, sizeof(*(q))); (q)->func = (void(*)(unsigned long))(f); } \
3174 while (0)
3175 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3176 (unsigned long) local);
3177
3178 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3179 (unsigned long) local);
3180 hostap_info_init(local);
3181
3182 HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3183 hostap_rx_tasklet, (unsigned long) local);
3184 skb_queue_head_init(&local->rx_list);
3185
3186 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3187 hostap_sta_tx_exc_tasklet, (unsigned long) local);
3188 skb_queue_head_init(&local->sta_tx_exc_list);
3189
3190 INIT_LIST_HEAD(&local->cmd_queue);
3191 init_waitqueue_head(&local->hostscan_wq);
3192
3193 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3194
3195 timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3196 timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3197 local->tick_timer.expires = jiffies + 2 * HZ;
3198 add_timer(&local->tick_timer);
3199
3200 INIT_LIST_HEAD(&local->bss_list);
3201
3202 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3203
3204 dev->type = ARPHRD_IEEE80211;
3205 dev->header_ops = &hostap_80211_ops;
3206
3207 rtnl_lock();
3208 ret = dev_alloc_name(dev, "wifi%d");
3209 SET_NETDEV_DEV(dev, sdev);
3210 if (ret >= 0)
3211 ret = register_netdevice(dev);
3212
3213 prism2_set_lockdep_class(dev);
3214 rtnl_unlock();
3215 if (ret < 0) {
3216 printk(KERN_WARNING "%s: register netdevice failed!\n",
3217 dev_info);
3218 goto fail;
3219 }
3220 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3221
3222 hostap_init_data(local);
3223 return dev;
3224
3225 fail:
3226 free_netdev(dev);
3227 return NULL;
3228 }
3229
3230
hostap_hw_ready(struct net_device * dev)3231 static int hostap_hw_ready(struct net_device *dev)
3232 {
3233 struct hostap_interface *iface;
3234 struct local_info *local;
3235
3236 iface = netdev_priv(dev);
3237 local = iface->local;
3238 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3239 "", dev_template);
3240
3241 if (local->ddev) {
3242 if (local->iw_mode == IW_MODE_INFRA ||
3243 local->iw_mode == IW_MODE_ADHOC) {
3244 netif_carrier_off(local->dev);
3245 netif_carrier_off(local->ddev);
3246 }
3247 hostap_init_proc(local);
3248 #ifndef PRISM2_NO_PROCFS_DEBUG
3249 proc_create_single_data("registers", 0, local->proc,
3250 prism2_registers_proc_show, local);
3251 #endif /* PRISM2_NO_PROCFS_DEBUG */
3252 hostap_init_ap_proc(local);
3253 return 0;
3254 }
3255
3256 return -1;
3257 }
3258
3259
prism2_free_local_data(struct net_device * dev)3260 static void prism2_free_local_data(struct net_device *dev)
3261 {
3262 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3263 int i;
3264 struct hostap_interface *iface;
3265 struct local_info *local;
3266 struct list_head *ptr, *n;
3267
3268 if (dev == NULL)
3269 return;
3270
3271 iface = netdev_priv(dev);
3272 local = iface->local;
3273
3274 /* Unregister all netdevs before freeing local data. */
3275 list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3276 iface = list_entry(ptr, struct hostap_interface, list);
3277 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3278 /* special handling for this interface below */
3279 continue;
3280 }
3281 hostap_remove_interface(iface->dev, 0, 1);
3282 }
3283
3284 unregister_netdev(local->dev);
3285
3286 flush_work(&local->reset_queue);
3287 flush_work(&local->set_multicast_list_queue);
3288 flush_work(&local->set_tim_queue);
3289 #ifndef PRISM2_NO_STATION_MODES
3290 flush_work(&local->info_queue);
3291 #endif
3292 flush_work(&local->comms_qual_update);
3293
3294 lib80211_crypt_info_free(&local->crypt_info);
3295
3296 if (timer_pending(&local->passive_scan_timer))
3297 del_timer(&local->passive_scan_timer);
3298
3299 if (timer_pending(&local->tick_timer))
3300 del_timer(&local->tick_timer);
3301
3302 prism2_clear_cmd_queue(local);
3303
3304 skb_queue_purge(&local->info_list);
3305 skb_queue_purge(&local->rx_list);
3306 skb_queue_purge(&local->sta_tx_exc_list);
3307
3308 if (local->dev_enabled)
3309 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3310
3311 if (local->ap != NULL)
3312 hostap_free_data(local->ap);
3313
3314 #ifndef PRISM2_NO_PROCFS_DEBUG
3315 if (local->proc != NULL)
3316 remove_proc_entry("registers", local->proc);
3317 #endif /* PRISM2_NO_PROCFS_DEBUG */
3318 hostap_remove_proc(local);
3319
3320 tx_cb = local->tx_callback;
3321 while (tx_cb != NULL) {
3322 tx_cb_prev = tx_cb;
3323 tx_cb = tx_cb->next;
3324 kfree(tx_cb_prev);
3325 }
3326
3327 hostap_set_hostapd(local, 0, 0);
3328 hostap_set_hostapd_sta(local, 0, 0);
3329
3330 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3331 if (local->frag_cache[i].skb != NULL)
3332 dev_kfree_skb(local->frag_cache[i].skb);
3333 }
3334
3335 #ifdef PRISM2_DOWNLOAD_SUPPORT
3336 prism2_download_free_data(local->dl_pri);
3337 prism2_download_free_data(local->dl_sec);
3338 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3339
3340 prism2_clear_set_tim_queue(local);
3341
3342 list_for_each_safe(ptr, n, &local->bss_list) {
3343 struct hostap_bss_info *bss =
3344 list_entry(ptr, struct hostap_bss_info, list);
3345 kfree(bss);
3346 }
3347
3348 kfree(local->pda);
3349 kfree(local->last_scan_results);
3350 kfree(local->generic_elem);
3351
3352 free_netdev(local->dev);
3353 }
3354
3355
3356 #if defined(PRISM2_PCI) || defined(PRISM2_PCCARD)
prism2_suspend(struct net_device * dev)3357 static void __maybe_unused prism2_suspend(struct net_device *dev)
3358 {
3359 struct hostap_interface *iface;
3360 struct local_info *local;
3361 union iwreq_data wrqu;
3362
3363 iface = netdev_priv(dev);
3364 local = iface->local;
3365
3366 /* Send disconnect event, e.g., to trigger reassociation after resume
3367 * if wpa_supplicant is used. */
3368 memset(&wrqu, 0, sizeof(wrqu));
3369 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3370 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3371
3372 /* Disable hardware and firmware */
3373 prism2_hw_shutdown(dev, 0);
3374 }
3375 #endif /* PRISM2_PCI || PRISM2_PCCARD */
3376
3377
3378 /* These might at some point be compiled separately and used as separate
3379 * kernel modules or linked into one */
3380 #ifdef PRISM2_DOWNLOAD_SUPPORT
3381 #include "hostap_download.c"
3382 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3383
3384 #ifdef PRISM2_CALLBACK
3385 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3386 * This can use platform specific code and must define prism2_callback()
3387 * function (if PRISM2_CALLBACK is not defined, these function calls are not
3388 * used. */
3389 #include "hostap_callback.c"
3390 #endif /* PRISM2_CALLBACK */
3391