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pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
blob75e3b5c3f1558bce3ffc32cc99e172f6d2fa7bc4
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 /*
31 * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
32 * by defining IWL to either 3945 or 4965. The Makefile used when building
33 * the base targets will create base-3945.o and base-4965.o
34 *
35 * The eventual goal is to move as many of the #if IWL / #endif blocks out of
36 * this file and into the hardware specific implementation files (iwl-XXXX.c)
37 * and leave only the common (non #ifdef sprinkled) code in this file
38 */
39
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/version.h>
43 #include <linux/init.h>
44 #include <linux/pci.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/delay.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/wireless.h>
50 #include <linux/firmware.h>
51 #include <linux/skbuff.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/if_arp.h>
55
56 #include <net/ieee80211_radiotap.h>
57 #include <net/mac80211.h>
58
59 #include <asm/div64.h>
60
61 #define IWL 3945
62
63 #include "iwlwifi.h"
64 #include "iwl-3945.h"
65 #include "iwl-helpers.h"
66
67 #ifdef CONFIG_IWLWIFI_DEBUG
68 u32 iwl_debug_level;
69 #endif
70
71 /******************************************************************************
72 *
73 * module boiler plate
74 *
75 ******************************************************************************/
76
77 /* module parameters */
78 int iwl_param_disable_hw_scan;
79 int iwl_param_debug;
80 int iwl_param_disable; /* def: enable radio */
81 int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
82 int iwl_param_hwcrypto; /* def: using software encryption */
83 int iwl_param_qos_enable = 1;
84 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
85
86 /*
87 * module name, copyright, version, etc.
88 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
89 */
90
91 #define DRV_DESCRIPTION \
92 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
93
94 #ifdef CONFIG_IWLWIFI_DEBUG
95 #define VD "d"
96 #else
97 #define VD
98 #endif
99
100 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
101 #define VS "s"
102 #else
103 #define VS
104 #endif
105
106 #define IWLWIFI_VERSION "1.1.17k" VD VS
107 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
108 #define DRV_VERSION IWLWIFI_VERSION
109
110 /* Change firmware file name, using "-" and incrementing number,
111 * *only* when uCode interface or architecture changes so that it
112 * is not compatible with earlier drivers.
113 * This number will also appear in << 8 position of 1st dword of uCode file */
114 #define IWL3945_UCODE_API "-1"
115
116 MODULE_DESCRIPTION(DRV_DESCRIPTION);
117 MODULE_VERSION(DRV_VERSION);
118 MODULE_AUTHOR(DRV_COPYRIGHT);
119 MODULE_LICENSE("GPL");
120
121 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
122 {
123 u16 fc = le16_to_cpu(hdr->frame_control);
124 int hdr_len = ieee80211_get_hdrlen(fc);
125
126 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
127 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
128 return NULL;
129 }
130
131 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
132 struct iwl_priv *priv, int mode)
133 {
134 int i;
135
136 for (i = 0; i < 3; i++)
137 if (priv->modes[i].mode == mode)
138 return &priv->modes[i];
139
140 return NULL;
141 }
142
143 static int iwl_is_empty_essid(const char *essid, int essid_len)
144 {
145 /* Single white space is for Linksys APs */
146 if (essid_len == 1 && essid[0] == ' ')
147 return 1;
148
149 /* Otherwise, if the entire essid is 0, we assume it is hidden */
150 while (essid_len) {
151 essid_len--;
152 if (essid[essid_len] != '\0')
153 return 0;
154 }
155
156 return 1;
157 }
158
159 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
160 {
161 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
162 const char *s = essid;
163 char *d = escaped;
164
165 if (iwl_is_empty_essid(essid, essid_len)) {
166 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
167 return escaped;
168 }
169
170 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
171 while (essid_len--) {
172 if (*s == '\0') {
173 *d++ = '\\';
174 *d++ = '0';
175 s++;
176 } else
177 *d++ = *s++;
178 }
179 *d = '\0';
180 return escaped;
181 }
182
183 static void iwl_print_hex_dump(int level, void *p, u32 len)
184 {
185 #ifdef CONFIG_IWLWIFI_DEBUG
186 if (!(iwl_debug_level & level))
187 return;
188
189 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
190 p, len, 1);
191 #endif
192 }
193
194 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
195 * DMA services
196 *
197 * Theory of operation
198 *
199 * A queue is a circular buffers with 'Read' and 'Write' pointers.
200 * 2 empty entries always kept in the buffer to protect from overflow.
201 *
202 * For Tx queue, there are low mark and high mark limits. If, after queuing
203 * the packet for Tx, free space become < low mark, Tx queue stopped. When
204 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
205 * Tx queue resumed.
206 *
207 * The IWL operates with six queues, one receive queue in the device's
208 * sram, one transmit queue for sending commands to the device firmware,
209 * and four transmit queues for data.
210 ***************************************************/
211
212 static int iwl_queue_space(const struct iwl_queue *q)
213 {
214 int s = q->last_used - q->first_empty;
215
216 if (q->last_used > q->first_empty)
217 s -= q->n_bd;
218
219 if (s <= 0)
220 s += q->n_window;
221 /* keep some reserve to not confuse empty and full situations */
222 s -= 2;
223 if (s < 0)
224 s = 0;
225 return s;
226 }
227
228 /* XXX: n_bd must be power-of-two size */
229 static inline int iwl_queue_inc_wrap(int index, int n_bd)
230 {
231 return ++index & (n_bd - 1);
232 }
233
234 /* XXX: n_bd must be power-of-two size */
235 static inline int iwl_queue_dec_wrap(int index, int n_bd)
236 {
237 return --index & (n_bd - 1);
238 }
239
240 static inline int x2_queue_used(const struct iwl_queue *q, int i)
241 {
242 return q->first_empty > q->last_used ?
243 (i >= q->last_used && i < q->first_empty) :
244 !(i < q->last_used && i >= q->first_empty);
245 }
246
247 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
248 {
249 if (is_huge)
250 return q->n_window;
251
252 return index & (q->n_window - 1);
253 }
254
255 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
256 int count, int slots_num, u32 id)
257 {
258 q->n_bd = count;
259 q->n_window = slots_num;
260 q->id = id;
261
262 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
263 * and iwl_queue_dec_wrap are broken. */
264 BUG_ON(!is_power_of_2(count));
265
266 /* slots_num must be power-of-two size, otherwise
267 * get_cmd_index is broken. */
268 BUG_ON(!is_power_of_2(slots_num));
269
270 q->low_mark = q->n_window / 4;
271 if (q->low_mark < 4)
272 q->low_mark = 4;
273
274 q->high_mark = q->n_window / 8;
275 if (q->high_mark < 2)
276 q->high_mark = 2;
277
278 q->first_empty = q->last_used = 0;
279
280 return 0;
281 }
282
283 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
284 struct iwl_tx_queue *txq, u32 id)
285 {
286 struct pci_dev *dev = priv->pci_dev;
287
288 if (id != IWL_CMD_QUEUE_NUM) {
289 txq->txb = kmalloc(sizeof(txq->txb[0]) *
290 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
291 if (!txq->txb) {
292 IWL_ERROR("kmalloc for auxilary BD "
293 "structures failed\n");
294 goto error;
295 }
296 } else
297 txq->txb = NULL;
298
299 txq->bd = pci_alloc_consistent(dev,
300 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
301 &txq->q.dma_addr);
302
303 if (!txq->bd) {
304 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
305 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
306 goto error;
307 }
308 txq->q.id = id;
309
310 return 0;
311
312 error:
313 if (txq->txb) {
314 kfree(txq->txb);
315 txq->txb = NULL;
316 }
317
318 return -ENOMEM;
319 }
320
321 int iwl_tx_queue_init(struct iwl_priv *priv,
322 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
323 {
324 struct pci_dev *dev = priv->pci_dev;
325 int len;
326 int rc = 0;
327
328 /* alocate command space + one big command for scan since scan
329 * command is very huge the system will not have two scan at the
330 * same time */
331 len = sizeof(struct iwl_cmd) * slots_num;
332 if (txq_id == IWL_CMD_QUEUE_NUM)
333 len += IWL_MAX_SCAN_SIZE;
334 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
335 if (!txq->cmd)
336 return -ENOMEM;
337
338 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
339 if (rc) {
340 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
341
342 return -ENOMEM;
343 }
344 txq->need_update = 0;
345
346 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
347 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
348 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
349 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
350
351 iwl_hw_tx_queue_init(priv, txq);
352
353 return 0;
354 }
355
356 /**
357 * iwl_tx_queue_free - Deallocate DMA queue.
358 * @txq: Transmit queue to deallocate.
359 *
360 * Empty queue by removing and destroying all BD's.
361 * Free all buffers. txq itself is not freed.
362 *
363 */
364 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
365 {
366 struct iwl_queue *q = &txq->q;
367 struct pci_dev *dev = priv->pci_dev;
368 int len;
369
370 if (q->n_bd == 0)
371 return;
372
373 /* first, empty all BD's */
374 for (; q->first_empty != q->last_used;
375 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
376 iwl_hw_txq_free_tfd(priv, txq);
377
378 len = sizeof(struct iwl_cmd) * q->n_window;
379 if (q->id == IWL_CMD_QUEUE_NUM)
380 len += IWL_MAX_SCAN_SIZE;
381
382 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
383
384 /* free buffers belonging to queue itself */
385 if (txq->q.n_bd)
386 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
387 txq->q.n_bd, txq->bd, txq->q.dma_addr);
388
389 if (txq->txb) {
390 kfree(txq->txb);
391 txq->txb = NULL;
392 }
393
394 /* 0 fill whole structure */
395 memset(txq, 0, sizeof(*txq));
396 }
397
398 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
399
400 /*************** STATION TABLE MANAGEMENT ****
401 *
402 * NOTE: This needs to be overhauled to better synchronize between
403 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
404 *
405 * mac80211 should also be examined to determine if sta_info is duplicating
406 * the functionality provided here
407 */
408
409 /**************************************************************/
410 #if 0 /* temparary disable till we add real remove station */
411 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
412 {
413 int index = IWL_INVALID_STATION;
414 int i;
415 unsigned long flags;
416
417 spin_lock_irqsave(&priv->sta_lock, flags);
418
419 if (is_ap)
420 index = IWL_AP_ID;
421 else if (is_broadcast_ether_addr(addr))
422 index = priv->hw_setting.bcast_sta_id;
423 else
424 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
425 if (priv->stations[i].used &&
426 !compare_ether_addr(priv->stations[i].sta.sta.addr,
427 addr)) {
428 index = i;
429 break;
430 }
431
432 if (unlikely(index == IWL_INVALID_STATION))
433 goto out;
434
435 if (priv->stations[index].used) {
436 priv->stations[index].used = 0;
437 priv->num_stations--;
438 }
439
440 BUG_ON(priv->num_stations < 0);
441
442 out:
443 spin_unlock_irqrestore(&priv->sta_lock, flags);
444 return 0;
445 }
446 #endif
447 static void iwl_clear_stations_table(struct iwl_priv *priv)
448 {
449 unsigned long flags;
450
451 spin_lock_irqsave(&priv->sta_lock, flags);
452
453 priv->num_stations = 0;
454 memset(priv->stations, 0, sizeof(priv->stations));
455
456 spin_unlock_irqrestore(&priv->sta_lock, flags);
457 }
458
459
460 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
461 {
462 int i;
463 int index = IWL_INVALID_STATION;
464 struct iwl_station_entry *station;
465 unsigned long flags_spin;
466 DECLARE_MAC_BUF(mac);
467 u8 rate;
468
469 spin_lock_irqsave(&priv->sta_lock, flags_spin);
470 if (is_ap)
471 index = IWL_AP_ID;
472 else if (is_broadcast_ether_addr(addr))
473 index = priv->hw_setting.bcast_sta_id;
474 else
475 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
476 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
477 addr)) {
478 index = i;
479 break;
480 }
481
482 if (!priv->stations[i].used &&
483 index == IWL_INVALID_STATION)
484 index = i;
485 }
486
487 /* These twh conditions has the same outcome but keep them separate
488 since they have different meaning */
489 if (unlikely(index == IWL_INVALID_STATION)) {
490 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
491 return index;
492 }
493
494 if (priv->stations[index].used &&
495 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
496 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
497 return index;
498 }
499
500 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
501 station = &priv->stations[index];
502 station->used = 1;
503 priv->num_stations++;
504
505 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
506 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
507 station->sta.mode = 0;
508 station->sta.sta.sta_id = index;
509 station->sta.station_flags = 0;
510
511 rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
512 IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
513
514 /* Turn on both antennas for the station... */
515 station->sta.rate_n_flags =
516 iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
517 station->current_rate.rate_n_flags =
518 le16_to_cpu(station->sta.rate_n_flags);
519
520 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
521 iwl_send_add_station(priv, &station->sta, flags);
522 return index;
523
524 }
525
526 /*************** DRIVER STATUS FUNCTIONS *****/
527
528 static inline int iwl_is_ready(struct iwl_priv *priv)
529 {
530 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
531 * set but EXIT_PENDING is not */
532 return test_bit(STATUS_READY, &priv->status) &&
533 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
534 !test_bit(STATUS_EXIT_PENDING, &priv->status);
535 }
536
537 static inline int iwl_is_alive(struct iwl_priv *priv)
538 {
539 return test_bit(STATUS_ALIVE, &priv->status);
540 }
541
542 static inline int iwl_is_init(struct iwl_priv *priv)
543 {
544 return test_bit(STATUS_INIT, &priv->status);
545 }
546
547 static inline int iwl_is_rfkill(struct iwl_priv *priv)
548 {
549 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
550 test_bit(STATUS_RF_KILL_SW, &priv->status);
551 }
552
553 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
554 {
555
556 if (iwl_is_rfkill(priv))
557 return 0;
558
559 return iwl_is_ready(priv);
560 }
561
562 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
563
564 #define IWL_CMD(x) case x : return #x
565
566 static const char *get_cmd_string(u8 cmd)
567 {
568 switch (cmd) {
569 IWL_CMD(REPLY_ALIVE);
570 IWL_CMD(REPLY_ERROR);
571 IWL_CMD(REPLY_RXON);
572 IWL_CMD(REPLY_RXON_ASSOC);
573 IWL_CMD(REPLY_QOS_PARAM);
574 IWL_CMD(REPLY_RXON_TIMING);
575 IWL_CMD(REPLY_ADD_STA);
576 IWL_CMD(REPLY_REMOVE_STA);
577 IWL_CMD(REPLY_REMOVE_ALL_STA);
578 IWL_CMD(REPLY_3945_RX);
579 IWL_CMD(REPLY_TX);
580 IWL_CMD(REPLY_RATE_SCALE);
581 IWL_CMD(REPLY_LEDS_CMD);
582 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
583 IWL_CMD(RADAR_NOTIFICATION);
584 IWL_CMD(REPLY_QUIET_CMD);
585 IWL_CMD(REPLY_CHANNEL_SWITCH);
586 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
587 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
588 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
589 IWL_CMD(POWER_TABLE_CMD);
590 IWL_CMD(PM_SLEEP_NOTIFICATION);
591 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
592 IWL_CMD(REPLY_SCAN_CMD);
593 IWL_CMD(REPLY_SCAN_ABORT_CMD);
594 IWL_CMD(SCAN_START_NOTIFICATION);
595 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
596 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
597 IWL_CMD(BEACON_NOTIFICATION);
598 IWL_CMD(REPLY_TX_BEACON);
599 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
600 IWL_CMD(QUIET_NOTIFICATION);
601 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
602 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
603 IWL_CMD(REPLY_BT_CONFIG);
604 IWL_CMD(REPLY_STATISTICS_CMD);
605 IWL_CMD(STATISTICS_NOTIFICATION);
606 IWL_CMD(REPLY_CARD_STATE_CMD);
607 IWL_CMD(CARD_STATE_NOTIFICATION);
608 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
609 default:
610 return "UNKNOWN";
611
612 }
613 }
614
615 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
616
617 /**
618 * iwl_enqueue_hcmd - enqueue a uCode command
619 * @priv: device private data point
620 * @cmd: a point to the ucode command structure
621 *
622 * The function returns < 0 values to indicate the operation is
623 * failed. On success, it turns the index (> 0) of command in the
624 * command queue.
625 */
626 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
627 {
628 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
629 struct iwl_queue *q = &txq->q;
630 struct iwl_tfd_frame *tfd;
631 u32 *control_flags;
632 struct iwl_cmd *out_cmd;
633 u32 idx;
634 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
635 dma_addr_t phys_addr;
636 int pad;
637 u16 count;
638 int ret;
639 unsigned long flags;
640
641 /* If any of the command structures end up being larger than
642 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
643 * we will need to increase the size of the TFD entries */
644 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
645 !(cmd->meta.flags & CMD_SIZE_HUGE));
646
647 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
648 IWL_ERROR("No space for Tx\n");
649 return -ENOSPC;
650 }
651
652 spin_lock_irqsave(&priv->hcmd_lock, flags);
653
654 tfd = &txq->bd[q->first_empty];
655 memset(tfd, 0, sizeof(*tfd));
656
657 control_flags = (u32 *) tfd;
658
659 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
660 out_cmd = &txq->cmd[idx];
661
662 out_cmd->hdr.cmd = cmd->id;
663 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
664 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
665
666 /* At this point, the out_cmd now has all of the incoming cmd
667 * information */
668
669 out_cmd->hdr.flags = 0;
670 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
671 INDEX_TO_SEQ(q->first_empty));
672 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
673 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
674
675 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
676 offsetof(struct iwl_cmd, hdr);
677 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
678
679 pad = U32_PAD(cmd->len);
680 count = TFD_CTL_COUNT_GET(*control_flags);
681 *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
682
683 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
684 "%d bytes at %d[%d]:%d\n",
685 get_cmd_string(out_cmd->hdr.cmd),
686 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
687 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
688
689 txq->need_update = 1;
690 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
691 ret = iwl_tx_queue_update_write_ptr(priv, txq);
692
693 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
694 return ret ? ret : idx;
695 }
696
697 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
698 {
699 int ret;
700
701 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
702
703 /* An asynchronous command can not expect an SKB to be set. */
704 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
705
706 /* An asynchronous command MUST have a callback. */
707 BUG_ON(!cmd->meta.u.callback);
708
709 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
710 return -EBUSY;
711
712 ret = iwl_enqueue_hcmd(priv, cmd);
713 if (ret < 0) {
714 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
715 get_cmd_string(cmd->id), ret);
716 return ret;
717 }
718 return 0;
719 }
720
721 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
722 {
723 int cmd_idx;
724 int ret;
725 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
726
727 BUG_ON(cmd->meta.flags & CMD_ASYNC);
728
729 /* A synchronous command can not have a callback set. */
730 BUG_ON(cmd->meta.u.callback != NULL);
731
732 if (atomic_xchg(&entry, 1)) {
733 IWL_ERROR("Error sending %s: Already sending a host command\n",
734 get_cmd_string(cmd->id));
735 return -EBUSY;
736 }
737
738 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
739
740 if (cmd->meta.flags & CMD_WANT_SKB)
741 cmd->meta.source = &cmd->meta;
742
743 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
744 if (cmd_idx < 0) {
745 ret = cmd_idx;
746 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
747 get_cmd_string(cmd->id), ret);
748 goto out;
749 }
750
751 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
752 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
753 HOST_COMPLETE_TIMEOUT);
754 if (!ret) {
755 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
756 IWL_ERROR("Error sending %s: time out after %dms.\n",
757 get_cmd_string(cmd->id),
758 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
759
760 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
761 ret = -ETIMEDOUT;
762 goto cancel;
763 }
764 }
765
766 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
767 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
768 get_cmd_string(cmd->id));
769 ret = -ECANCELED;
770 goto fail;
771 }
772 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
773 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
774 get_cmd_string(cmd->id));
775 ret = -EIO;
776 goto fail;
777 }
778 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
779 IWL_ERROR("Error: Response NULL in '%s'\n",
780 get_cmd_string(cmd->id));
781 ret = -EIO;
782 goto out;
783 }
784
785 ret = 0;
786 goto out;
787
788 cancel:
789 if (cmd->meta.flags & CMD_WANT_SKB) {
790 struct iwl_cmd *qcmd;
791
792 /* Cancel the CMD_WANT_SKB flag for the cmd in the
793 * TX cmd queue. Otherwise in case the cmd comes
794 * in later, it will possibly set an invalid
795 * address (cmd->meta.source). */
796 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
797 qcmd->meta.flags &= ~CMD_WANT_SKB;
798 }
799 fail:
800 if (cmd->meta.u.skb) {
801 dev_kfree_skb_any(cmd->meta.u.skb);
802 cmd->meta.u.skb = NULL;
803 }
804 out:
805 atomic_set(&entry, 0);
806 return ret;
807 }
808
809 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
810 {
811 /* A command can not be asynchronous AND expect an SKB to be set. */
812 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
813 (cmd->meta.flags & CMD_WANT_SKB));
814
815 if (cmd->meta.flags & CMD_ASYNC)
816 return iwl_send_cmd_async(priv, cmd);
817
818 return iwl_send_cmd_sync(priv, cmd);
819 }
820
821 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
822 {
823 struct iwl_host_cmd cmd = {
824 .id = id,
825 .len = len,
826 .data = data,
827 };
828
829 return iwl_send_cmd_sync(priv, &cmd);
830 }
831
832 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
833 {
834 struct iwl_host_cmd cmd = {
835 .id = id,
836 .len = sizeof(val),
837 .data = &val,
838 };
839
840 return iwl_send_cmd_sync(priv, &cmd);
841 }
842
843 int iwl_send_statistics_request(struct iwl_priv *priv)
844 {
845 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
846 }
847
848 /**
849 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
850 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
851 * @channel: Any channel valid for the requested phymode
852
853 * In addition to setting the staging RXON, priv->phymode is also set.
854 *
855 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
856 * in the staging RXON flag structure based on the phymode
857 */
858 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
859 {
860 if (!iwl_get_channel_info(priv, phymode, channel)) {
861 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
862 channel, phymode);
863 return -EINVAL;
864 }
865
866 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
867 (priv->phymode == phymode))
868 return 0;
869
870 priv->staging_rxon.channel = cpu_to_le16(channel);
871 if (phymode == MODE_IEEE80211A)
872 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
873 else
874 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
875
876 priv->phymode = phymode;
877
878 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
879
880 return 0;
881 }
882
883 /**
884 * iwl_check_rxon_cmd - validate RXON structure is valid
885 *
886 * NOTE: This is really only useful during development and can eventually
887 * be #ifdef'd out once the driver is stable and folks aren't actively
888 * making changes
889 */
890 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
891 {
892 int error = 0;
893 int counter = 1;
894
895 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
896 error |= le32_to_cpu(rxon->flags &
897 (RXON_FLG_TGJ_NARROW_BAND_MSK |
898 RXON_FLG_RADAR_DETECT_MSK));
899 if (error)
900 IWL_WARNING("check 24G fields %d | %d\n",
901 counter++, error);
902 } else {
903 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
904 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
905 if (error)
906 IWL_WARNING("check 52 fields %d | %d\n",
907 counter++, error);
908 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
909 if (error)
910 IWL_WARNING("check 52 CCK %d | %d\n",
911 counter++, error);
912 }
913 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
914 if (error)
915 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
916
917 /* make sure basic rates 6Mbps and 1Mbps are supported */
918 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
919 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
920 if (error)
921 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
922
923 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
924 if (error)
925 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
926
927 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
928 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
929 if (error)
930 IWL_WARNING("check CCK and short slot %d | %d\n",
931 counter++, error);
932
933 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
934 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
935 if (error)
936 IWL_WARNING("check CCK & auto detect %d | %d\n",
937 counter++, error);
938
939 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
940 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
941 if (error)
942 IWL_WARNING("check TGG and auto detect %d | %d\n",
943 counter++, error);
944
945 if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
946 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
947 RXON_FLG_ANT_A_MSK)) == 0);
948 if (error)
949 IWL_WARNING("check antenna %d %d\n", counter++, error);
950
951 if (error)
952 IWL_WARNING("Tuning to channel %d\n",
953 le16_to_cpu(rxon->channel));
954
955 if (error) {
956 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
957 return -1;
958 }
959 return 0;
960 }
961
962 /**
963 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
964 * @priv: staging_rxon is comapred to active_rxon
965 *
966 * If the RXON structure is changing sufficient to require a new
967 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
968 * to indicate a new tune is required.
969 */
970 static int iwl_full_rxon_required(struct iwl_priv *priv)
971 {
972
973 /* These items are only settable from the full RXON command */
974 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
975 compare_ether_addr(priv->staging_rxon.bssid_addr,
976 priv->active_rxon.bssid_addr) ||
977 compare_ether_addr(priv->staging_rxon.node_addr,
978 priv->active_rxon.node_addr) ||
979 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
980 priv->active_rxon.wlap_bssid_addr) ||
981 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
982 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
983 (priv->staging_rxon.air_propagation !=
984 priv->active_rxon.air_propagation) ||
985 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
986 return 1;
987
988 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
989 * be updated with the RXON_ASSOC command -- however only some
990 * flag transitions are allowed using RXON_ASSOC */
991
992 /* Check if we are not switching bands */
993 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
994 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
995 return 1;
996
997 /* Check if we are switching association toggle */
998 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
999 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1000 return 1;
1001
1002 return 0;
1003 }
1004
1005 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1006 {
1007 int rc = 0;
1008 struct iwl_rx_packet *res = NULL;
1009 struct iwl_rxon_assoc_cmd rxon_assoc;
1010 struct iwl_host_cmd cmd = {
1011 .id = REPLY_RXON_ASSOC,
1012 .len = sizeof(rxon_assoc),
1013 .meta.flags = CMD_WANT_SKB,
1014 .data = &rxon_assoc,
1015 };
1016 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1017 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1018
1019 if ((rxon1->flags == rxon2->flags) &&
1020 (rxon1->filter_flags == rxon2->filter_flags) &&
1021 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1022 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1023 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1024 return 0;
1025 }
1026
1027 rxon_assoc.flags = priv->staging_rxon.flags;
1028 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1029 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1030 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1031 rxon_assoc.reserved = 0;
1032
1033 rc = iwl_send_cmd_sync(priv, &cmd);
1034 if (rc)
1035 return rc;
1036
1037 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1038 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1039 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1040 rc = -EIO;
1041 }
1042
1043 priv->alloc_rxb_skb--;
1044 dev_kfree_skb_any(cmd.meta.u.skb);
1045
1046 return rc;
1047 }
1048
1049 /**
1050 * iwl_commit_rxon - commit staging_rxon to hardware
1051 *
1052 * The RXON command in staging_rxon is commited to the hardware and
1053 * the active_rxon structure is updated with the new data. This
1054 * function correctly transitions out of the RXON_ASSOC_MSK state if
1055 * a HW tune is required based on the RXON structure changes.
1056 */
1057 static int iwl_commit_rxon(struct iwl_priv *priv)
1058 {
1059 /* cast away the const for active_rxon in this function */
1060 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1061 int rc = 0;
1062 DECLARE_MAC_BUF(mac);
1063
1064 if (!iwl_is_alive(priv))
1065 return -1;
1066
1067 /* always get timestamp with Rx frame */
1068 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1069
1070 /* select antenna */
1071 priv->staging_rxon.flags &=
1072 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1073 priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1074
1075 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1076 if (rc) {
1077 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1078 return -EINVAL;
1079 }
1080
1081 /* If we don't need to send a full RXON, we can use
1082 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1083 * and other flags for the current radio configuration. */
1084 if (!iwl_full_rxon_required(priv)) {
1085 rc = iwl_send_rxon_assoc(priv);
1086 if (rc) {
1087 IWL_ERROR("Error setting RXON_ASSOC "
1088 "configuration (%d).\n", rc);
1089 return rc;
1090 }
1091
1092 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1093
1094 return 0;
1095 }
1096
1097 /* If we are currently associated and the new config requires
1098 * an RXON_ASSOC and the new config wants the associated mask enabled,
1099 * we must clear the associated from the active configuration
1100 * before we apply the new config */
1101 if (iwl_is_associated(priv) &&
1102 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1103 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1104 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1105
1106 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1107 sizeof(struct iwl_rxon_cmd),
1108 &priv->active_rxon);
1109
1110 /* If the mask clearing failed then we set
1111 * active_rxon back to what it was previously */
1112 if (rc) {
1113 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1114 IWL_ERROR("Error clearing ASSOC_MSK on current "
1115 "configuration (%d).\n", rc);
1116 return rc;
1117 }
1118 }
1119
1120 IWL_DEBUG_INFO("Sending RXON\n"
1121 "* with%s RXON_FILTER_ASSOC_MSK\n"
1122 "* channel = %d\n"
1123 "* bssid = %s\n",
1124 ((priv->staging_rxon.filter_flags &
1125 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1126 le16_to_cpu(priv->staging_rxon.channel),
1127 print_mac(mac, priv->staging_rxon.bssid_addr));
1128
1129 /* Apply the new configuration */
1130 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1131 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1132 if (rc) {
1133 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1134 return rc;
1135 }
1136
1137 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1138
1139 iwl_clear_stations_table(priv);
1140
1141 /* If we issue a new RXON command which required a tune then we must
1142 * send a new TXPOWER command or we won't be able to Tx any frames */
1143 rc = iwl_hw_reg_send_txpower(priv);
1144 if (rc) {
1145 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1146 return rc;
1147 }
1148
1149 /* Add the broadcast address so we can send broadcast frames */
1150 if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
1151 IWL_INVALID_STATION) {
1152 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1153 return -EIO;
1154 }
1155
1156 /* If we have set the ASSOC_MSK and we are in BSS mode then
1157 * add the IWL_AP_ID to the station rate table */
1158 if (iwl_is_associated(priv) &&
1159 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1160 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1161 == IWL_INVALID_STATION) {
1162 IWL_ERROR("Error adding AP address for transmit.\n");
1163 return -EIO;
1164 }
1165
1166 /* Init the hardware's rate fallback order based on the
1167 * phymode */
1168 rc = iwl3945_init_hw_rate_table(priv);
1169 if (rc) {
1170 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1171 return -EIO;
1172 }
1173
1174 return 0;
1175 }
1176
1177 static int iwl_send_bt_config(struct iwl_priv *priv)
1178 {
1179 struct iwl_bt_cmd bt_cmd = {
1180 .flags = 3,
1181 .lead_time = 0xAA,
1182 .max_kill = 1,
1183 .kill_ack_mask = 0,
1184 .kill_cts_mask = 0,
1185 };
1186
1187 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1188 sizeof(struct iwl_bt_cmd), &bt_cmd);
1189 }
1190
1191 static int iwl_send_scan_abort(struct iwl_priv *priv)
1192 {
1193 int rc = 0;
1194 struct iwl_rx_packet *res;
1195 struct iwl_host_cmd cmd = {
1196 .id = REPLY_SCAN_ABORT_CMD,
1197 .meta.flags = CMD_WANT_SKB,
1198 };
1199
1200 /* If there isn't a scan actively going on in the hardware
1201 * then we are in between scan bands and not actually
1202 * actively scanning, so don't send the abort command */
1203 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1204 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1205 return 0;
1206 }
1207
1208 rc = iwl_send_cmd_sync(priv, &cmd);
1209 if (rc) {
1210 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1211 return rc;
1212 }
1213
1214 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1215 if (res->u.status != CAN_ABORT_STATUS) {
1216 /* The scan abort will return 1 for success or
1217 * 2 for "failure". A failure condition can be
1218 * due to simply not being in an active scan which
1219 * can occur if we send the scan abort before we
1220 * the microcode has notified us that a scan is
1221 * completed. */
1222 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1223 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1224 clear_bit(STATUS_SCAN_HW, &priv->status);
1225 }
1226
1227 dev_kfree_skb_any(cmd.meta.u.skb);
1228
1229 return rc;
1230 }
1231
1232 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1233 struct iwl_cmd *cmd,
1234 struct sk_buff *skb)
1235 {
1236 return 1;
1237 }
1238
1239 /*
1240 * CARD_STATE_CMD
1241 *
1242 * Use: Sets the internal card state to enable, disable, or halt
1243 *
1244 * When in the 'enable' state the card operates as normal.
1245 * When in the 'disable' state, the card enters into a low power mode.
1246 * When in the 'halt' state, the card is shut down and must be fully
1247 * restarted to come back on.
1248 */
1249 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1250 {
1251 struct iwl_host_cmd cmd = {
1252 .id = REPLY_CARD_STATE_CMD,
1253 .len = sizeof(u32),
1254 .data = &flags,
1255 .meta.flags = meta_flag,
1256 };
1257
1258 if (meta_flag & CMD_ASYNC)
1259 cmd.meta.u.callback = iwl_card_state_sync_callback;
1260
1261 return iwl_send_cmd(priv, &cmd);
1262 }
1263
1264 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1265 struct iwl_cmd *cmd, struct sk_buff *skb)
1266 {
1267 struct iwl_rx_packet *res = NULL;
1268
1269 if (!skb) {
1270 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1271 return 1;
1272 }
1273
1274 res = (struct iwl_rx_packet *)skb->data;
1275 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1276 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1277 res->hdr.flags);
1278 return 1;
1279 }
1280
1281 switch (res->u.add_sta.status) {
1282 case ADD_STA_SUCCESS_MSK:
1283 break;
1284 default:
1285 break;
1286 }
1287
1288 /* We didn't cache the SKB; let the caller free it */
1289 return 1;
1290 }
1291
1292 int iwl_send_add_station(struct iwl_priv *priv,
1293 struct iwl_addsta_cmd *sta, u8 flags)
1294 {
1295 struct iwl_rx_packet *res = NULL;
1296 int rc = 0;
1297 struct iwl_host_cmd cmd = {
1298 .id = REPLY_ADD_STA,
1299 .len = sizeof(struct iwl_addsta_cmd),
1300 .meta.flags = flags,
1301 .data = sta,
1302 };
1303
1304 if (flags & CMD_ASYNC)
1305 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1306 else
1307 cmd.meta.flags |= CMD_WANT_SKB;
1308
1309 rc = iwl_send_cmd(priv, &cmd);
1310
1311 if (rc || (flags & CMD_ASYNC))
1312 return rc;
1313
1314 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1315 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1316 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1317 res->hdr.flags);
1318 rc = -EIO;
1319 }
1320
1321 if (rc == 0) {
1322 switch (res->u.add_sta.status) {
1323 case ADD_STA_SUCCESS_MSK:
1324 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1325 break;
1326 default:
1327 rc = -EIO;
1328 IWL_WARNING("REPLY_ADD_STA failed\n");
1329 break;
1330 }
1331 }
1332
1333 priv->alloc_rxb_skb--;
1334 dev_kfree_skb_any(cmd.meta.u.skb);
1335
1336 return rc;
1337 }
1338
1339 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1340 struct ieee80211_key_conf *keyconf,
1341 u8 sta_id)
1342 {
1343 unsigned long flags;
1344 __le16 key_flags = 0;
1345
1346 switch (keyconf->alg) {
1347 case ALG_CCMP:
1348 key_flags |= STA_KEY_FLG_CCMP;
1349 key_flags |= cpu_to_le16(
1350 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1351 key_flags &= ~STA_KEY_FLG_INVALID;
1352 break;
1353 case ALG_TKIP:
1354 case ALG_WEP:
1355 return -EINVAL;
1356 default:
1357 return -EINVAL;
1358 }
1359 spin_lock_irqsave(&priv->sta_lock, flags);
1360 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1361 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1362 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1363 keyconf->keylen);
1364
1365 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1366 keyconf->keylen);
1367 priv->stations[sta_id].sta.key.key_flags = key_flags;
1368 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1369 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1370
1371 spin_unlock_irqrestore(&priv->sta_lock, flags);
1372
1373 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1374 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1375 return 0;
1376 }
1377
1378 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1379 {
1380 unsigned long flags;
1381
1382 spin_lock_irqsave(&priv->sta_lock, flags);
1383 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1384 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1385 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1386 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1387 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1388 spin_unlock_irqrestore(&priv->sta_lock, flags);
1389
1390 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1391 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1392 return 0;
1393 }
1394
1395 static void iwl_clear_free_frames(struct iwl_priv *priv)
1396 {
1397 struct list_head *element;
1398
1399 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1400 priv->frames_count);
1401
1402 while (!list_empty(&priv->free_frames)) {
1403 element = priv->free_frames.next;
1404 list_del(element);
1405 kfree(list_entry(element, struct iwl_frame, list));
1406 priv->frames_count--;
1407 }
1408
1409 if (priv->frames_count) {
1410 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1411 priv->frames_count);
1412 priv->frames_count = 0;
1413 }
1414 }
1415
1416 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1417 {
1418 struct iwl_frame *frame;
1419 struct list_head *element;
1420 if (list_empty(&priv->free_frames)) {
1421 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1422 if (!frame) {
1423 IWL_ERROR("Could not allocate frame!\n");
1424 return NULL;
1425 }
1426
1427 priv->frames_count++;
1428 return frame;
1429 }
1430
1431 element = priv->free_frames.next;
1432 list_del(element);
1433 return list_entry(element, struct iwl_frame, list);
1434 }
1435
1436 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1437 {
1438 memset(frame, 0, sizeof(*frame));
1439 list_add(&frame->list, &priv->free_frames);
1440 }
1441
1442 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1443 struct ieee80211_hdr *hdr,
1444 const u8 *dest, int left)
1445 {
1446
1447 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1448 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1449 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1450 return 0;
1451
1452 if (priv->ibss_beacon->len > left)
1453 return 0;
1454
1455 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1456
1457 return priv->ibss_beacon->len;
1458 }
1459
1460 static int iwl_rate_index_from_plcp(int plcp)
1461 {
1462 int i = 0;
1463
1464 for (i = 0; i < IWL_RATE_COUNT; i++)
1465 if (iwl_rates[i].plcp == plcp)
1466 return i;
1467 return -1;
1468 }
1469
1470 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1471 {
1472 u8 i;
1473
1474 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1475 i = iwl_rates[i].next_ieee) {
1476 if (rate_mask & (1 << i))
1477 return iwl_rates[i].plcp;
1478 }
1479
1480 return IWL_RATE_INVALID;
1481 }
1482
1483 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1484 {
1485 struct iwl_frame *frame;
1486 unsigned int frame_size;
1487 int rc;
1488 u8 rate;
1489
1490 frame = iwl_get_free_frame(priv);
1491
1492 if (!frame) {
1493 IWL_ERROR("Could not obtain free frame buffer for beacon "
1494 "command.\n");
1495 return -ENOMEM;
1496 }
1497
1498 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1499 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1500 0xFF0);
1501 if (rate == IWL_INVALID_RATE)
1502 rate = IWL_RATE_6M_PLCP;
1503 } else {
1504 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1505 if (rate == IWL_INVALID_RATE)
1506 rate = IWL_RATE_1M_PLCP;
1507 }
1508
1509 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1510
1511 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1512 &frame->u.cmd[0]);
1513
1514 iwl_free_frame(priv, frame);
1515
1516 return rc;
1517 }
1518
1519 /******************************************************************************
1520 *
1521 * EEPROM related functions
1522 *
1523 ******************************************************************************/
1524
1525 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1526 {
1527 memcpy(mac, priv->eeprom.mac_address, 6);
1528 }
1529
1530 /**
1531 * iwl_eeprom_init - read EEPROM contents
1532 *
1533 * Load the EEPROM from adapter into priv->eeprom
1534 *
1535 * NOTE: This routine uses the non-debug IO access functions.
1536 */
1537 int iwl_eeprom_init(struct iwl_priv *priv)
1538 {
1539 u16 *e = (u16 *)&priv->eeprom;
1540 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1541 u32 r;
1542 int sz = sizeof(priv->eeprom);
1543 int rc;
1544 int i;
1545 u16 addr;
1546
1547 /* The EEPROM structure has several padding buffers within it
1548 * and when adding new EEPROM maps is subject to programmer errors
1549 * which may be very difficult to identify without explicitly
1550 * checking the resulting size of the eeprom map. */
1551 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1552
1553 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1554 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1555 return -ENOENT;
1556 }
1557
1558 rc = iwl_eeprom_aqcuire_semaphore(priv);
1559 if (rc < 0) {
1560 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1561 return -ENOENT;
1562 }
1563
1564 /* eeprom is an array of 16bit values */
1565 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1566 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1567 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1568
1569 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1570 i += IWL_EEPROM_ACCESS_DELAY) {
1571 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1572 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1573 break;
1574 udelay(IWL_EEPROM_ACCESS_DELAY);
1575 }
1576
1577 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1578 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1579 return -ETIMEDOUT;
1580 }
1581 e[addr / 2] = le16_to_cpu(r >> 16);
1582 }
1583
1584 return 0;
1585 }
1586
1587 /******************************************************************************
1588 *
1589 * Misc. internal state and helper functions
1590 *
1591 ******************************************************************************/
1592 #ifdef CONFIG_IWLWIFI_DEBUG
1593
1594 /**
1595 * iwl_report_frame - dump frame to syslog during debug sessions
1596 *
1597 * hack this function to show different aspects of received frames,
1598 * including selective frame dumps.
1599 * group100 parameter selects whether to show 1 out of 100 good frames.
1600 *
1601 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1602 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1603 * is 3945-specific and gives bad output for 4965. Need to split the
1604 * functionality, keep common stuff here.
1605 */
1606 void iwl_report_frame(struct iwl_priv *priv,
1607 struct iwl_rx_packet *pkt,
1608 struct ieee80211_hdr *header, int group100)
1609 {
1610 u32 to_us;
1611 u32 print_summary = 0;
1612 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1613 u32 hundred = 0;
1614 u32 dataframe = 0;
1615 u16 fc;
1616 u16 seq_ctl;
1617 u16 channel;
1618 u16 phy_flags;
1619 int rate_sym;
1620 u16 length;
1621 u16 status;
1622 u16 bcn_tmr;
1623 u32 tsf_low;
1624 u64 tsf;
1625 u8 rssi;
1626 u8 agc;
1627 u16 sig_avg;
1628 u16 noise_diff;
1629 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1630 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1631 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1632 u8 *data = IWL_RX_DATA(pkt);
1633
1634 /* MAC header */
1635 fc = le16_to_cpu(header->frame_control);
1636 seq_ctl = le16_to_cpu(header->seq_ctrl);
1637
1638 /* metadata */
1639 channel = le16_to_cpu(rx_hdr->channel);
1640 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1641 rate_sym = rx_hdr->rate;
1642 length = le16_to_cpu(rx_hdr->len);
1643
1644 /* end-of-frame status and timestamp */
1645 status = le32_to_cpu(rx_end->status);
1646 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1647 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1648 tsf = le64_to_cpu(rx_end->timestamp);
1649
1650 /* signal statistics */
1651 rssi = rx_stats->rssi;
1652 agc = rx_stats->agc;
1653 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1654 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1655
1656 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1657
1658 /* if data frame is to us and all is good,
1659 * (optionally) print summary for only 1 out of every 100 */
1660 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1661 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1662 dataframe = 1;
1663 if (!group100)
1664 print_summary = 1; /* print each frame */
1665 else if (priv->framecnt_to_us < 100) {
1666 priv->framecnt_to_us++;
1667 print_summary = 0;
1668 } else {
1669 priv->framecnt_to_us = 0;
1670 print_summary = 1;
1671 hundred = 1;
1672 }
1673 } else {
1674 /* print summary for all other frames */
1675 print_summary = 1;
1676 }
1677
1678 if (print_summary) {
1679 char *title;
1680 u32 rate;
1681
1682 if (hundred)
1683 title = "100Frames";
1684 else if (fc & IEEE80211_FCTL_RETRY)
1685 title = "Retry";
1686 else if (ieee80211_is_assoc_response(fc))
1687 title = "AscRsp";
1688 else if (ieee80211_is_reassoc_response(fc))
1689 title = "RasRsp";
1690 else if (ieee80211_is_probe_response(fc)) {
1691 title = "PrbRsp";
1692 print_dump = 1; /* dump frame contents */
1693 } else if (ieee80211_is_beacon(fc)) {
1694 title = "Beacon";
1695 print_dump = 1; /* dump frame contents */
1696 } else if (ieee80211_is_atim(fc))
1697 title = "ATIM";
1698 else if (ieee80211_is_auth(fc))
1699 title = "Auth";
1700 else if (ieee80211_is_deauth(fc))
1701 title = "DeAuth";
1702 else if (ieee80211_is_disassoc(fc))
1703 title = "DisAssoc";
1704 else
1705 title = "Frame";
1706
1707 rate = iwl_rate_index_from_plcp(rate_sym);
1708 if (rate == -1)
1709 rate = 0;
1710 else
1711 rate = iwl_rates[rate].ieee / 2;
1712
1713 /* print frame summary.
1714 * MAC addresses show just the last byte (for brevity),
1715 * but you can hack it to show more, if you'd like to. */
1716 if (dataframe)
1717 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1718 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1719 title, fc, header->addr1[5],
1720 length, rssi, channel, rate);
1721 else {
1722 /* src/dst addresses assume managed mode */
1723 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1724 "src=0x%02x, rssi=%u, tim=%lu usec, "
1725 "phy=0x%02x, chnl=%d\n",
1726 title, fc, header->addr1[5],
1727 header->addr3[5], rssi,
1728 tsf_low - priv->scan_start_tsf,
1729 phy_flags, channel);
1730 }
1731 }
1732 if (print_dump)
1733 iwl_print_hex_dump(IWL_DL_RX, data, length);
1734 }
1735 #endif
1736
1737 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1738 {
1739 if (priv->hw_setting.shared_virt)
1740 pci_free_consistent(priv->pci_dev,
1741 sizeof(struct iwl_shared),
1742 priv->hw_setting.shared_virt,
1743 priv->hw_setting.shared_phys);
1744 }
1745
1746 /**
1747 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1748 *
1749 * return : set the bit for each supported rate insert in ie
1750 */
1751 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1752 u16 basic_rate, int max_count)
1753 {
1754 u16 ret_rates = 0, bit;
1755 int i;
1756 u8 *rates;
1757
1758 rates = &(ie[1]);
1759
1760 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1761 if (bit & supported_rate) {
1762 ret_rates |= bit;
1763 rates[*ie] = iwl_rates[i].ieee |
1764 ((bit & basic_rate) ? 0x80 : 0x00);
1765 *ie = *ie + 1;
1766 if (*ie >= max_count)
1767 break;
1768 }
1769 }
1770
1771 return ret_rates;
1772 }
1773
1774 /**
1775 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1776 */
1777 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1778 struct ieee80211_mgmt *frame,
1779 int left, int is_direct)
1780 {
1781 int len = 0;
1782 u8 *pos = NULL;
1783 u16 ret_rates;
1784
1785 /* Make sure there is enough space for the probe request,
1786 * two mandatory IEs and the data */
1787 left -= 24;
1788 if (left < 0)
1789 return 0;
1790 len += 24;
1791
1792 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1793 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1794 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1795 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1796 frame->seq_ctrl = 0;
1797
1798 /* fill in our indirect SSID IE */
1799 /* ...next IE... */
1800
1801 left -= 2;
1802 if (left < 0)
1803 return 0;
1804 len += 2;
1805 pos = &(frame->u.probe_req.variable[0]);
1806 *pos++ = WLAN_EID_SSID;
1807 *pos++ = 0;
1808
1809 /* fill in our direct SSID IE... */
1810 if (is_direct) {
1811 /* ...next IE... */
1812 left -= 2 + priv->essid_len;
1813 if (left < 0)
1814 return 0;
1815 /* ... fill it in... */
1816 *pos++ = WLAN_EID_SSID;
1817 *pos++ = priv->essid_len;
1818 memcpy(pos, priv->essid, priv->essid_len);
1819 pos += priv->essid_len;
1820 len += 2 + priv->essid_len;
1821 }
1822
1823 /* fill in supported rate */
1824 /* ...next IE... */
1825 left -= 2;
1826 if (left < 0)
1827 return 0;
1828 /* ... fill it in... */
1829 *pos++ = WLAN_EID_SUPP_RATES;
1830 *pos = 0;
1831 ret_rates = priv->active_rate = priv->rates_mask;
1832 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1833
1834 iwl_supported_rate_to_ie(pos, priv->active_rate,
1835 priv->active_rate_basic, left);
1836 len += 2 + *pos;
1837 pos += (*pos) + 1;
1838 ret_rates = ~ret_rates & priv->active_rate;
1839
1840 if (ret_rates == 0)
1841 goto fill_end;
1842
1843 /* fill in supported extended rate */
1844 /* ...next IE... */
1845 left -= 2;
1846 if (left < 0)
1847 return 0;
1848 /* ... fill it in... */
1849 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1850 *pos = 0;
1851 iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1852 if (*pos > 0)
1853 len += 2 + *pos;
1854
1855 fill_end:
1856 return (u16)len;
1857 }
1858
1859 /*
1860 * QoS support
1861 */
1862 #ifdef CONFIG_IWLWIFI_QOS
1863 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1864 struct iwl_qosparam_cmd *qos)
1865 {
1866
1867 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1868 sizeof(struct iwl_qosparam_cmd), qos);
1869 }
1870
1871 static void iwl_reset_qos(struct iwl_priv *priv)
1872 {
1873 u16 cw_min = 15;
1874 u16 cw_max = 1023;
1875 u8 aifs = 2;
1876 u8 is_legacy = 0;
1877 unsigned long flags;
1878 int i;
1879
1880 spin_lock_irqsave(&priv->lock, flags);
1881 priv->qos_data.qos_active = 0;
1882
1883 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1884 if (priv->qos_data.qos_enable)
1885 priv->qos_data.qos_active = 1;
1886 if (!(priv->active_rate & 0xfff0)) {
1887 cw_min = 31;
1888 is_legacy = 1;
1889 }
1890 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1891 if (priv->qos_data.qos_enable)
1892 priv->qos_data.qos_active = 1;
1893 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1894 cw_min = 31;
1895 is_legacy = 1;
1896 }
1897
1898 if (priv->qos_data.qos_active)
1899 aifs = 3;
1900
1901 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1902 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1903 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1904 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1905 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1906
1907 if (priv->qos_data.qos_active) {
1908 i = 1;
1909 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1910 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1911 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1912 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1913 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1914
1915 i = 2;
1916 priv->qos_data.def_qos_parm.ac[i].cw_min =
1917 cpu_to_le16((cw_min + 1) / 2 - 1);
1918 priv->qos_data.def_qos_parm.ac[i].cw_max =
1919 cpu_to_le16(cw_max);
1920 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1921 if (is_legacy)
1922 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1923 cpu_to_le16(6016);
1924 else
1925 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1926 cpu_to_le16(3008);
1927 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1928
1929 i = 3;
1930 priv->qos_data.def_qos_parm.ac[i].cw_min =
1931 cpu_to_le16((cw_min + 1) / 4 - 1);
1932 priv->qos_data.def_qos_parm.ac[i].cw_max =
1933 cpu_to_le16((cw_max + 1) / 2 - 1);
1934 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1935 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1936 if (is_legacy)
1937 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1938 cpu_to_le16(3264);
1939 else
1940 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1941 cpu_to_le16(1504);
1942 } else {
1943 for (i = 1; i < 4; i++) {
1944 priv->qos_data.def_qos_parm.ac[i].cw_min =
1945 cpu_to_le16(cw_min);
1946 priv->qos_data.def_qos_parm.ac[i].cw_max =
1947 cpu_to_le16(cw_max);
1948 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1949 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1950 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1951 }
1952 }
1953 IWL_DEBUG_QOS("set QoS to default \n");
1954
1955 spin_unlock_irqrestore(&priv->lock, flags);
1956 }
1957
1958 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1959 {
1960 unsigned long flags;
1961
1962 if (priv == NULL)
1963 return;
1964
1965 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1966 return;
1967
1968 if (!priv->qos_data.qos_enable)
1969 return;
1970
1971 spin_lock_irqsave(&priv->lock, flags);
1972 priv->qos_data.def_qos_parm.qos_flags = 0;
1973
1974 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1975 !priv->qos_data.qos_cap.q_AP.txop_request)
1976 priv->qos_data.def_qos_parm.qos_flags |=
1977 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1978
1979 if (priv->qos_data.qos_active)
1980 priv->qos_data.def_qos_parm.qos_flags |=
1981 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1982
1983 spin_unlock_irqrestore(&priv->lock, flags);
1984
1985 if (force || iwl_is_associated(priv)) {
1986 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1987 priv->qos_data.qos_active);
1988
1989 iwl_send_qos_params_command(priv,
1990 &(priv->qos_data.def_qos_parm));
1991 }
1992 }
1993
1994 #endif /* CONFIG_IWLWIFI_QOS */
1995 /*
1996 * Power management (not Tx power!) functions
1997 */
1998 #define MSEC_TO_USEC 1024
1999
2000 #define NOSLP __constant_cpu_to_le32(0)
2001 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2002 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2003 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2004 __constant_cpu_to_le32(X1), \
2005 __constant_cpu_to_le32(X2), \
2006 __constant_cpu_to_le32(X3), \
2007 __constant_cpu_to_le32(X4)}
2008
2009
2010 /* default power management (not Tx power) table values */
2011 /* for tim 0-10 */
2012 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2013 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2014 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2015 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2016 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2017 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2018 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2019 };
2020
2021 /* for tim > 10 */
2022 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2023 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2024 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2025 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2026 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2027 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2028 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2029 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2030 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2031 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2032 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2033 };
2034
2035 int iwl_power_init_handle(struct iwl_priv *priv)
2036 {
2037 int rc = 0, i;
2038 struct iwl_power_mgr *pow_data;
2039 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2040 u16 pci_pm;
2041
2042 IWL_DEBUG_POWER("Initialize power \n");
2043
2044 pow_data = &(priv->power_data);
2045
2046 memset(pow_data, 0, sizeof(*pow_data));
2047
2048 pow_data->active_index = IWL_POWER_RANGE_0;
2049 pow_data->dtim_val = 0xffff;
2050
2051 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2052 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2053
2054 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2055 if (rc != 0)
2056 return 0;
2057 else {
2058 struct iwl_powertable_cmd *cmd;
2059
2060 IWL_DEBUG_POWER("adjust power command flags\n");
2061
2062 for (i = 0; i < IWL_POWER_AC; i++) {
2063 cmd = &pow_data->pwr_range_0[i].cmd;
2064
2065 if (pci_pm & 0x1)
2066 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2067 else
2068 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2069 }
2070 }
2071 return rc;
2072 }
2073
2074 static int iwl_update_power_cmd(struct iwl_priv *priv,
2075 struct iwl_powertable_cmd *cmd, u32 mode)
2076 {
2077 int rc = 0, i;
2078 u8 skip;
2079 u32 max_sleep = 0;
2080 struct iwl_power_vec_entry *range;
2081 u8 period = 0;
2082 struct iwl_power_mgr *pow_data;
2083
2084 if (mode > IWL_POWER_INDEX_5) {
2085 IWL_DEBUG_POWER("Error invalid power mode \n");
2086 return -1;
2087 }
2088 pow_data = &(priv->power_data);
2089
2090 if (pow_data->active_index == IWL_POWER_RANGE_0)
2091 range = &pow_data->pwr_range_0[0];
2092 else
2093 range = &pow_data->pwr_range_1[1];
2094
2095 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2096
2097 #ifdef IWL_MAC80211_DISABLE
2098 if (priv->assoc_network != NULL) {
2099 unsigned long flags;
2100
2101 period = priv->assoc_network->tim.tim_period;
2102 }
2103 #endif /*IWL_MAC80211_DISABLE */
2104 skip = range[mode].no_dtim;
2105
2106 if (period == 0) {
2107 period = 1;
2108 skip = 0;
2109 }
2110
2111 if (skip == 0) {
2112 max_sleep = period;
2113 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2114 } else {
2115 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2116 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2117 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2118 }
2119
2120 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2121 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2122 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2123 }
2124
2125 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2126 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2127 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2128 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2129 le32_to_cpu(cmd->sleep_interval[0]),
2130 le32_to_cpu(cmd->sleep_interval[1]),
2131 le32_to_cpu(cmd->sleep_interval[2]),
2132 le32_to_cpu(cmd->sleep_interval[3]),
2133 le32_to_cpu(cmd->sleep_interval[4]));
2134
2135 return rc;
2136 }
2137
2138 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2139 {
2140 u32 final_mode = mode;
2141 int rc;
2142 struct iwl_powertable_cmd cmd;
2143
2144 /* If on battery, set to 3,
2145 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2146 * else user level */
2147 switch (mode) {
2148 case IWL_POWER_BATTERY:
2149 final_mode = IWL_POWER_INDEX_3;
2150 break;
2151 case IWL_POWER_AC:
2152 final_mode = IWL_POWER_MODE_CAM;
2153 break;
2154 default:
2155 final_mode = mode;
2156 break;
2157 }
2158
2159 iwl_update_power_cmd(priv, &cmd, final_mode);
2160
2161 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2162
2163 if (final_mode == IWL_POWER_MODE_CAM)
2164 clear_bit(STATUS_POWER_PMI, &priv->status);
2165 else
2166 set_bit(STATUS_POWER_PMI, &priv->status);
2167
2168 return rc;
2169 }
2170
2171 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2172 {
2173 /* Filter incoming packets to determine if they are targeted toward
2174 * this network, discarding packets coming from ourselves */
2175 switch (priv->iw_mode) {
2176 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2177 /* packets from our adapter are dropped (echo) */
2178 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2179 return 0;
2180 /* {broad,multi}cast packets to our IBSS go through */
2181 if (is_multicast_ether_addr(header->addr1))
2182 return !compare_ether_addr(header->addr3, priv->bssid);
2183 /* packets to our adapter go through */
2184 return !compare_ether_addr(header->addr1, priv->mac_addr);
2185 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2186 /* packets from our adapter are dropped (echo) */
2187 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2188 return 0;
2189 /* {broad,multi}cast packets to our BSS go through */
2190 if (is_multicast_ether_addr(header->addr1))
2191 return !compare_ether_addr(header->addr2, priv->bssid);
2192 /* packets to our adapter go through */
2193 return !compare_ether_addr(header->addr1, priv->mac_addr);
2194 }
2195
2196 return 1;
2197 }
2198
2199 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2200
2201 const char *iwl_get_tx_fail_reason(u32 status)
2202 {
2203 switch (status & TX_STATUS_MSK) {
2204 case TX_STATUS_SUCCESS:
2205 return "SUCCESS";
2206 TX_STATUS_ENTRY(SHORT_LIMIT);
2207 TX_STATUS_ENTRY(LONG_LIMIT);
2208 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2209 TX_STATUS_ENTRY(MGMNT_ABORT);
2210 TX_STATUS_ENTRY(NEXT_FRAG);
2211 TX_STATUS_ENTRY(LIFE_EXPIRE);
2212 TX_STATUS_ENTRY(DEST_PS);
2213 TX_STATUS_ENTRY(ABORTED);
2214 TX_STATUS_ENTRY(BT_RETRY);
2215 TX_STATUS_ENTRY(STA_INVALID);
2216 TX_STATUS_ENTRY(FRAG_DROPPED);
2217 TX_STATUS_ENTRY(TID_DISABLE);
2218 TX_STATUS_ENTRY(FRAME_FLUSHED);
2219 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2220 TX_STATUS_ENTRY(TX_LOCKED);
2221 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2222 }
2223
2224 return "UNKNOWN";
2225 }
2226
2227 /**
2228 * iwl_scan_cancel - Cancel any currently executing HW scan
2229 *
2230 * NOTE: priv->mutex is not required before calling this function
2231 */
2232 static int iwl_scan_cancel(struct iwl_priv *priv)
2233 {
2234 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2235 clear_bit(STATUS_SCANNING, &priv->status);
2236 return 0;
2237 }
2238
2239 if (test_bit(STATUS_SCANNING, &priv->status)) {
2240 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2241 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2242 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2243 queue_work(priv->workqueue, &priv->abort_scan);
2244
2245 } else
2246 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2247
2248 return test_bit(STATUS_SCANNING, &priv->status);
2249 }
2250
2251 return 0;
2252 }
2253
2254 /**
2255 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2256 * @ms: amount of time to wait (in milliseconds) for scan to abort
2257 *
2258 * NOTE: priv->mutex must be held before calling this function
2259 */
2260 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2261 {
2262 unsigned long now = jiffies;
2263 int ret;
2264
2265 ret = iwl_scan_cancel(priv);
2266 if (ret && ms) {
2267 mutex_unlock(&priv->mutex);
2268 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2269 test_bit(STATUS_SCANNING, &priv->status))
2270 msleep(1);
2271 mutex_lock(&priv->mutex);
2272
2273 return test_bit(STATUS_SCANNING, &priv->status);
2274 }
2275
2276 return ret;
2277 }
2278
2279 static void iwl_sequence_reset(struct iwl_priv *priv)
2280 {
2281 /* Reset ieee stats */
2282
2283 /* We don't reset the net_device_stats (ieee->stats) on
2284 * re-association */
2285
2286 priv->last_seq_num = -1;
2287 priv->last_frag_num = -1;
2288 priv->last_packet_time = 0;
2289
2290 iwl_scan_cancel(priv);
2291 }
2292
2293 #define MAX_UCODE_BEACON_INTERVAL 1024
2294 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2295
2296 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2297 {
2298 u16 new_val = 0;
2299 u16 beacon_factor = 0;
2300
2301 beacon_factor =
2302 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2303 / MAX_UCODE_BEACON_INTERVAL;
2304 new_val = beacon_val / beacon_factor;
2305
2306 return cpu_to_le16(new_val);
2307 }
2308
2309 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2310 {
2311 u64 interval_tm_unit;
2312 u64 tsf, result;
2313 unsigned long flags;
2314 struct ieee80211_conf *conf = NULL;
2315 u16 beacon_int = 0;
2316
2317 conf = ieee80211_get_hw_conf(priv->hw);
2318
2319 spin_lock_irqsave(&priv->lock, flags);
2320 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2321 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2322
2323 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2324
2325 tsf = priv->timestamp1;
2326 tsf = ((tsf << 32) | priv->timestamp0);
2327
2328 beacon_int = priv->beacon_int;
2329 spin_unlock_irqrestore(&priv->lock, flags);
2330
2331 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2332 if (beacon_int == 0) {
2333 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2334 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2335 } else {
2336 priv->rxon_timing.beacon_interval =
2337 cpu_to_le16(beacon_int);
2338 priv->rxon_timing.beacon_interval =
2339 iwl_adjust_beacon_interval(
2340 le16_to_cpu(priv->rxon_timing.beacon_interval));
2341 }
2342
2343 priv->rxon_timing.atim_window = 0;
2344 } else {
2345 priv->rxon_timing.beacon_interval =
2346 iwl_adjust_beacon_interval(conf->beacon_int);
2347 /* TODO: we need to get atim_window from upper stack
2348 * for now we set to 0 */
2349 priv->rxon_timing.atim_window = 0;
2350 }
2351
2352 interval_tm_unit =
2353 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2354 result = do_div(tsf, interval_tm_unit);
2355 priv->rxon_timing.beacon_init_val =
2356 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2357
2358 IWL_DEBUG_ASSOC
2359 ("beacon interval %d beacon timer %d beacon tim %d\n",
2360 le16_to_cpu(priv->rxon_timing.beacon_interval),
2361 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2362 le16_to_cpu(priv->rxon_timing.atim_window));
2363 }
2364
2365 static int iwl_scan_initiate(struct iwl_priv *priv)
2366 {
2367 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2368 IWL_ERROR("APs don't scan.\n");
2369 return 0;
2370 }
2371
2372 if (!iwl_is_ready_rf(priv)) {
2373 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2374 return -EIO;
2375 }
2376
2377 if (test_bit(STATUS_SCANNING, &priv->status)) {
2378 IWL_DEBUG_SCAN("Scan already in progress.\n");
2379 return -EAGAIN;
2380 }
2381
2382 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2383 IWL_DEBUG_SCAN("Scan request while abort pending. "
2384 "Queuing.\n");
2385 return -EAGAIN;
2386 }
2387
2388 IWL_DEBUG_INFO("Starting scan...\n");
2389 priv->scan_bands = 2;
2390 set_bit(STATUS_SCANNING, &priv->status);
2391 priv->scan_start = jiffies;
2392 priv->scan_pass_start = priv->scan_start;
2393
2394 queue_work(priv->workqueue, &priv->request_scan);
2395
2396 return 0;
2397 }
2398
2399 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2400 {
2401 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2402
2403 if (hw_decrypt)
2404 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2405 else
2406 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2407
2408 return 0;
2409 }
2410
2411 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2412 {
2413 if (phymode == MODE_IEEE80211A) {
2414 priv->staging_rxon.flags &=
2415 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2416 | RXON_FLG_CCK_MSK);
2417 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2418 } else {
2419 /* Copied from iwl_bg_post_associate() */
2420 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2421 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2422 else
2423 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2424
2425 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2426 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2427
2428 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2429 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2430 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2431 }
2432 }
2433
2434 /*
2435 * initilize rxon structure with default values fromm eeprom
2436 */
2437 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2438 {
2439 const struct iwl_channel_info *ch_info;
2440
2441 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2442
2443 switch (priv->iw_mode) {
2444 case IEEE80211_IF_TYPE_AP:
2445 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2446 break;
2447
2448 case IEEE80211_IF_TYPE_STA:
2449 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2450 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2451 break;
2452
2453 case IEEE80211_IF_TYPE_IBSS:
2454 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2455 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2456 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2457 RXON_FILTER_ACCEPT_GRP_MSK;
2458 break;
2459
2460 case IEEE80211_IF_TYPE_MNTR:
2461 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2462 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2463 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2464 break;
2465 }
2466
2467 #if 0
2468 /* TODO: Figure out when short_preamble would be set and cache from
2469 * that */
2470 if (!hw_to_local(priv->hw)->short_preamble)
2471 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2472 else
2473 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2474 #endif
2475
2476 ch_info = iwl_get_channel_info(priv, priv->phymode,
2477 le16_to_cpu(priv->staging_rxon.channel));
2478
2479 if (!ch_info)
2480 ch_info = &priv->channel_info[0];
2481
2482 /*
2483 * in some case A channels are all non IBSS
2484 * in this case force B/G channel
2485 */
2486 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2487 !(is_channel_ibss(ch_info)))
2488 ch_info = &priv->channel_info[0];
2489
2490 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2491 if (is_channel_a_band(ch_info))
2492 priv->phymode = MODE_IEEE80211A;
2493 else
2494 priv->phymode = MODE_IEEE80211G;
2495
2496 iwl_set_flags_for_phymode(priv, priv->phymode);
2497
2498 priv->staging_rxon.ofdm_basic_rates =
2499 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2500 priv->staging_rxon.cck_basic_rates =
2501 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2502 }
2503
2504 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2505 {
2506 if (!iwl_is_ready_rf(priv))
2507 return -EAGAIN;
2508
2509 if (mode == IEEE80211_IF_TYPE_IBSS) {
2510 const struct iwl_channel_info *ch_info;
2511
2512 ch_info = iwl_get_channel_info(priv,
2513 priv->phymode,
2514 le16_to_cpu(priv->staging_rxon.channel));
2515
2516 if (!ch_info || !is_channel_ibss(ch_info)) {
2517 IWL_ERROR("channel %d not IBSS channel\n",
2518 le16_to_cpu(priv->staging_rxon.channel));
2519 return -EINVAL;
2520 }
2521 }
2522
2523 cancel_delayed_work(&priv->scan_check);
2524 if (iwl_scan_cancel_timeout(priv, 100)) {
2525 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2526 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2527 return -EAGAIN;
2528 }
2529
2530 priv->iw_mode = mode;
2531
2532 iwl_connection_init_rx_config(priv);
2533 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2534
2535 iwl_clear_stations_table(priv);
2536
2537 iwl_commit_rxon(priv);
2538
2539 return 0;
2540 }
2541
2542 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2543 struct ieee80211_tx_control *ctl,
2544 struct iwl_cmd *cmd,
2545 struct sk_buff *skb_frag,
2546 int last_frag)
2547 {
2548 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2549
2550 switch (keyinfo->alg) {
2551 case ALG_CCMP:
2552 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2553 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2554 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2555 break;
2556
2557 case ALG_TKIP:
2558 #if 0
2559 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2560
2561 if (last_frag)
2562 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2563 8);
2564 else
2565 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2566 #endif
2567 break;
2568
2569 case ALG_WEP:
2570 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2571 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2572
2573 if (keyinfo->keylen == 13)
2574 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2575
2576 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2577
2578 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2579 "with key %d\n", ctl->key_idx);
2580 break;
2581
2582 default:
2583 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2584 break;
2585 }
2586 }
2587
2588 /*
2589 * handle build REPLY_TX command notification.
2590 */
2591 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2592 struct iwl_cmd *cmd,
2593 struct ieee80211_tx_control *ctrl,
2594 struct ieee80211_hdr *hdr,
2595 int is_unicast, u8 std_id)
2596 {
2597 __le16 *qc;
2598 u16 fc = le16_to_cpu(hdr->frame_control);
2599 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2600
2601 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2602 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2603 tx_flags |= TX_CMD_FLG_ACK_MSK;
2604 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2605 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2606 if (ieee80211_is_probe_response(fc) &&
2607 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2608 tx_flags |= TX_CMD_FLG_TSF_MSK;
2609 } else {
2610 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2611 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2612 }
2613
2614 cmd->cmd.tx.sta_id = std_id;
2615 if (ieee80211_get_morefrag(hdr))
2616 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2617
2618 qc = ieee80211_get_qos_ctrl(hdr);
2619 if (qc) {
2620 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2621 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2622 } else
2623 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2624
2625 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2626 tx_flags |= TX_CMD_FLG_RTS_MSK;
2627 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2628 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2629 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2630 tx_flags |= TX_CMD_FLG_CTS_MSK;
2631 }
2632
2633 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2634 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2635
2636 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2637 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2638 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2639 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2640 cmd->cmd.tx.timeout.pm_frame_timeout =
2641 cpu_to_le16(3);
2642 else
2643 cmd->cmd.tx.timeout.pm_frame_timeout =
2644 cpu_to_le16(2);
2645 } else
2646 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2647
2648 cmd->cmd.tx.driver_txop = 0;
2649 cmd->cmd.tx.tx_flags = tx_flags;
2650 cmd->cmd.tx.next_frame_len = 0;
2651 }
2652
2653 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2654 {
2655 int sta_id;
2656 u16 fc = le16_to_cpu(hdr->frame_control);
2657
2658 /* If this frame is broadcast or not data then use the broadcast
2659 * station id */
2660 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2661 is_multicast_ether_addr(hdr->addr1))
2662 return priv->hw_setting.bcast_sta_id;
2663
2664 switch (priv->iw_mode) {
2665
2666 /* If this frame is part of a BSS network (we're a station), then
2667 * we use the AP's station id */
2668 case IEEE80211_IF_TYPE_STA:
2669 return IWL_AP_ID;
2670
2671 /* If we are an AP, then find the station, or use BCAST */
2672 case IEEE80211_IF_TYPE_AP:
2673 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2674 if (sta_id != IWL_INVALID_STATION)
2675 return sta_id;
2676 return priv->hw_setting.bcast_sta_id;
2677
2678 /* If this frame is part of a IBSS network, then we use the
2679 * target specific station id */
2680 case IEEE80211_IF_TYPE_IBSS: {
2681 DECLARE_MAC_BUF(mac);
2682
2683 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2684 if (sta_id != IWL_INVALID_STATION)
2685 return sta_id;
2686
2687 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2688
2689 if (sta_id != IWL_INVALID_STATION)
2690 return sta_id;
2691
2692 IWL_DEBUG_DROP("Station %s not in station map. "
2693 "Defaulting to broadcast...\n",
2694 print_mac(mac, hdr->addr1));
2695 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2696 return priv->hw_setting.bcast_sta_id;
2697 }
2698 default:
2699 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2700 return priv->hw_setting.bcast_sta_id;
2701 }
2702 }
2703
2704 /*
2705 * start REPLY_TX command process
2706 */
2707 static int iwl_tx_skb(struct iwl_priv *priv,
2708 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2709 {
2710 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2711 struct iwl_tfd_frame *tfd;
2712 u32 *control_flags;
2713 int txq_id = ctl->queue;
2714 struct iwl_tx_queue *txq = NULL;
2715 struct iwl_queue *q = NULL;
2716 dma_addr_t phys_addr;
2717 dma_addr_t txcmd_phys;
2718 struct iwl_cmd *out_cmd = NULL;
2719 u16 len, idx, len_org;
2720 u8 id, hdr_len, unicast;
2721 u8 sta_id;
2722 u16 seq_number = 0;
2723 u16 fc;
2724 __le16 *qc;
2725 u8 wait_write_ptr = 0;
2726 unsigned long flags;
2727 int rc;
2728
2729 spin_lock_irqsave(&priv->lock, flags);
2730 if (iwl_is_rfkill(priv)) {
2731 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2732 goto drop_unlock;
2733 }
2734
2735 if (!priv->interface_id) {
2736 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2737 goto drop_unlock;
2738 }
2739
2740 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2741 IWL_ERROR("ERROR: No TX rate available.\n");
2742 goto drop_unlock;
2743 }
2744
2745 unicast = !is_multicast_ether_addr(hdr->addr1);
2746 id = 0;
2747
2748 fc = le16_to_cpu(hdr->frame_control);
2749
2750 #ifdef CONFIG_IWLWIFI_DEBUG
2751 if (ieee80211_is_auth(fc))
2752 IWL_DEBUG_TX("Sending AUTH frame\n");
2753 else if (ieee80211_is_assoc_request(fc))
2754 IWL_DEBUG_TX("Sending ASSOC frame\n");
2755 else if (ieee80211_is_reassoc_request(fc))
2756 IWL_DEBUG_TX("Sending REASSOC frame\n");
2757 #endif
2758
2759 if (!iwl_is_associated(priv) &&
2760 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2761 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2762 goto drop_unlock;
2763 }
2764
2765 spin_unlock_irqrestore(&priv->lock, flags);
2766
2767 hdr_len = ieee80211_get_hdrlen(fc);
2768 sta_id = iwl_get_sta_id(priv, hdr);
2769 if (sta_id == IWL_INVALID_STATION) {
2770 DECLARE_MAC_BUF(mac);
2771
2772 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2773 print_mac(mac, hdr->addr1));
2774 goto drop;
2775 }
2776
2777 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2778
2779 qc = ieee80211_get_qos_ctrl(hdr);
2780 if (qc) {
2781 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2782 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2783 IEEE80211_SCTL_SEQ;
2784 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2785 (hdr->seq_ctrl &
2786 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2787 seq_number += 0x10;
2788 }
2789 txq = &priv->txq[txq_id];
2790 q = &txq->q;
2791
2792 spin_lock_irqsave(&priv->lock, flags);
2793
2794 tfd = &txq->bd[q->first_empty];
2795 memset(tfd, 0, sizeof(*tfd));
2796 control_flags = (u32 *) tfd;
2797 idx = get_cmd_index(q, q->first_empty, 0);
2798
2799 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2800 txq->txb[q->first_empty].skb[0] = skb;
2801 memcpy(&(txq->txb[q->first_empty].status.control),
2802 ctl, sizeof(struct ieee80211_tx_control));
2803 out_cmd = &txq->cmd[idx];
2804 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2805 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2806 out_cmd->hdr.cmd = REPLY_TX;
2807 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2808 INDEX_TO_SEQ(q->first_empty)));
2809 /* copy frags header */
2810 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2811
2812 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2813 len = priv->hw_setting.tx_cmd_len +
2814 sizeof(struct iwl_cmd_header) + hdr_len;
2815
2816 len_org = len;
2817 len = (len + 3) & ~3;
2818
2819 if (len_org != len)
2820 len_org = 1;
2821 else
2822 len_org = 0;
2823
2824 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2825 offsetof(struct iwl_cmd, hdr);
2826
2827 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2828
2829 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2830 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2831
2832 /* 802.11 null functions have no payload... */
2833 len = skb->len - hdr_len;
2834 if (len) {
2835 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2836 len, PCI_DMA_TODEVICE);
2837 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2838 }
2839
2840 /* If there is no payload, then only one TFD is used */
2841 if (!len)
2842 *control_flags = TFD_CTL_COUNT_SET(1);
2843 else
2844 *control_flags = TFD_CTL_COUNT_SET(2) |
2845 TFD_CTL_PAD_SET(U32_PAD(len));
2846
2847 len = (u16)skb->len;
2848 out_cmd->cmd.tx.len = cpu_to_le16(len);
2849
2850 /* TODO need this for burst mode later on */
2851 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2852
2853 /* set is_hcca to 0; it probably will never be implemented */
2854 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2855
2856 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2857 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2858
2859 if (!ieee80211_get_morefrag(hdr)) {
2860 txq->need_update = 1;
2861 if (qc) {
2862 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2863 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2864 }
2865 } else {
2866 wait_write_ptr = 1;
2867 txq->need_update = 0;
2868 }
2869
2870 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2871 sizeof(out_cmd->cmd.tx));
2872
2873 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2874 ieee80211_get_hdrlen(fc));
2875
2876 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2877 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2878 spin_unlock_irqrestore(&priv->lock, flags);
2879
2880 if (rc)
2881 return rc;
2882
2883 if ((iwl_queue_space(q) < q->high_mark)
2884 && priv->mac80211_registered) {
2885 if (wait_write_ptr) {
2886 spin_lock_irqsave(&priv->lock, flags);
2887 txq->need_update = 1;
2888 iwl_tx_queue_update_write_ptr(priv, txq);
2889 spin_unlock_irqrestore(&priv->lock, flags);
2890 }
2891
2892 ieee80211_stop_queue(priv->hw, ctl->queue);
2893 }
2894
2895 return 0;
2896
2897 drop_unlock:
2898 spin_unlock_irqrestore(&priv->lock, flags);
2899 drop:
2900 return -1;
2901 }
2902
2903 static void iwl_set_rate(struct iwl_priv *priv)
2904 {
2905 const struct ieee80211_hw_mode *hw = NULL;
2906 struct ieee80211_rate *rate;
2907 int i;
2908
2909 hw = iwl_get_hw_mode(priv, priv->phymode);
2910
2911 priv->active_rate = 0;
2912 priv->active_rate_basic = 0;
2913
2914 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2915 hw->mode == MODE_IEEE80211A ?
2916 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2917
2918 for (i = 0; i < hw->num_rates; i++) {
2919 rate = &(hw->rates[i]);
2920 if ((rate->val < IWL_RATE_COUNT) &&
2921 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2922 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2923 rate->val, iwl_rates[rate->val].plcp,
2924 (rate->flags & IEEE80211_RATE_BASIC) ?
2925 "*" : "");
2926 priv->active_rate |= (1 << rate->val);
2927 if (rate->flags & IEEE80211_RATE_BASIC)
2928 priv->active_rate_basic |= (1 << rate->val);
2929 } else
2930 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2931 rate->val, iwl_rates[rate->val].plcp);
2932 }
2933
2934 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2935 priv->active_rate, priv->active_rate_basic);
2936
2937 /*
2938 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2939 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2940 * OFDM
2941 */
2942 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2943 priv->staging_rxon.cck_basic_rates =
2944 ((priv->active_rate_basic &
2945 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2946 else
2947 priv->staging_rxon.cck_basic_rates =
2948 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2949
2950 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2951 priv->staging_rxon.ofdm_basic_rates =
2952 ((priv->active_rate_basic &
2953 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2954 IWL_FIRST_OFDM_RATE) & 0xFF;
2955 else
2956 priv->staging_rxon.ofdm_basic_rates =
2957 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2958 }
2959
2960 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2961 {
2962 unsigned long flags;
2963
2964 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2965 return;
2966
2967 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2968 disable_radio ? "OFF" : "ON");
2969
2970 if (disable_radio) {
2971 iwl_scan_cancel(priv);
2972 /* FIXME: This is a workaround for AP */
2973 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2974 spin_lock_irqsave(&priv->lock, flags);
2975 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2976 CSR_UCODE_SW_BIT_RFKILL);
2977 spin_unlock_irqrestore(&priv->lock, flags);
2978 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2979 set_bit(STATUS_RF_KILL_SW, &priv->status);
2980 }
2981 return;
2982 }
2983
2984 spin_lock_irqsave(&priv->lock, flags);
2985 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2986
2987 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2988 spin_unlock_irqrestore(&priv->lock, flags);
2989
2990 /* wake up ucode */
2991 msleep(10);
2992
2993 spin_lock_irqsave(&priv->lock, flags);
2994 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2995 if (!iwl_grab_restricted_access(priv))
2996 iwl_release_restricted_access(priv);
2997 spin_unlock_irqrestore(&priv->lock, flags);
2998
2999 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3000 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3001 "disabled by HW switch\n");
3002 return;
3003 }
3004
3005 queue_work(priv->workqueue, &priv->restart);
3006 return;
3007 }
3008
3009 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3010 u32 decrypt_res, struct ieee80211_rx_status *stats)
3011 {
3012 u16 fc =
3013 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3014
3015 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3016 return;
3017
3018 if (!(fc & IEEE80211_FCTL_PROTECTED))
3019 return;
3020
3021 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3022 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3023 case RX_RES_STATUS_SEC_TYPE_TKIP:
3024 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3025 RX_RES_STATUS_BAD_ICV_MIC)
3026 stats->flag |= RX_FLAG_MMIC_ERROR;
3027 case RX_RES_STATUS_SEC_TYPE_WEP:
3028 case RX_RES_STATUS_SEC_TYPE_CCMP:
3029 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3030 RX_RES_STATUS_DECRYPT_OK) {
3031 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3032 stats->flag |= RX_FLAG_DECRYPTED;
3033 }
3034 break;
3035
3036 default:
3037 break;
3038 }
3039 }
3040
3041 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3042 struct iwl_rx_mem_buffer *rxb,
3043 void *data, short len,
3044 struct ieee80211_rx_status *stats,
3045 u16 phy_flags)
3046 {
3047 struct iwl_rt_rx_hdr *iwl_rt;
3048
3049 /* First cache any information we need before we overwrite
3050 * the information provided in the skb from the hardware */
3051 s8 signal = stats->ssi;
3052 s8 noise = 0;
3053 int rate = stats->rate;
3054 u64 tsf = stats->mactime;
3055 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3056
3057 /* We received data from the HW, so stop the watchdog */
3058 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3059 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3060 return;
3061 }
3062
3063 /* copy the frame data to write after where the radiotap header goes */
3064 iwl_rt = (void *)rxb->skb->data;
3065 memmove(iwl_rt->payload, data, len);
3066
3067 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3068 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3069
3070 /* total header + data */
3071 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3072
3073 /* Set the size of the skb to the size of the frame */
3074 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3075
3076 /* Big bitfield of all the fields we provide in radiotap */
3077 iwl_rt->rt_hdr.it_present =
3078 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3079 (1 << IEEE80211_RADIOTAP_FLAGS) |
3080 (1 << IEEE80211_RADIOTAP_RATE) |
3081 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3082 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3083 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3084 (1 << IEEE80211_RADIOTAP_ANTENNA));
3085
3086 /* Zero the flags, we'll add to them as we go */
3087 iwl_rt->rt_flags = 0;
3088
3089 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3090
3091 /* Convert to dBm */
3092 iwl_rt->rt_dbmsignal = signal;
3093 iwl_rt->rt_dbmnoise = noise;
3094
3095 /* Convert the channel frequency and set the flags */
3096 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3097 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3098 iwl_rt->rt_chbitmask =
3099 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3100 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3101 iwl_rt->rt_chbitmask =
3102 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3103 else /* 802.11g */
3104 iwl_rt->rt_chbitmask =
3105 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3106
3107 rate = iwl_rate_index_from_plcp(rate);
3108 if (rate == -1)
3109 iwl_rt->rt_rate = 0;
3110 else
3111 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3112
3113 /* antenna number */
3114 iwl_rt->rt_antenna =
3115 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3116
3117 /* set the preamble flag if we have it */
3118 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3119 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3120
3121 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3122
3123 stats->flag |= RX_FLAG_RADIOTAP;
3124 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3125 rxb->skb = NULL;
3126 }
3127
3128
3129 #define IWL_PACKET_RETRY_TIME HZ
3130
3131 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3132 {
3133 u16 sc = le16_to_cpu(header->seq_ctrl);
3134 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3135 u16 frag = sc & IEEE80211_SCTL_FRAG;
3136 u16 *last_seq, *last_frag;
3137 unsigned long *last_time;
3138
3139 switch (priv->iw_mode) {
3140 case IEEE80211_IF_TYPE_IBSS:{
3141 struct list_head *p;
3142 struct iwl_ibss_seq *entry = NULL;
3143 u8 *mac = header->addr2;
3144 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3145
3146 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3147 entry =
3148 list_entry(p, struct iwl_ibss_seq, list);
3149 if (!compare_ether_addr(entry->mac, mac))
3150 break;
3151 }
3152 if (p == &priv->ibss_mac_hash[index]) {
3153 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3154 if (!entry) {
3155 IWL_ERROR
3156 ("Cannot malloc new mac entry\n");
3157 return 0;
3158 }
3159 memcpy(entry->mac, mac, ETH_ALEN);
3160 entry->seq_num = seq;
3161 entry->frag_num = frag;
3162 entry->packet_time = jiffies;
3163 list_add(&entry->list,
3164 &priv->ibss_mac_hash[index]);
3165 return 0;
3166 }
3167 last_seq = &entry->seq_num;
3168 last_frag = &entry->frag_num;
3169 last_time = &entry->packet_time;
3170 break;
3171 }
3172 case IEEE80211_IF_TYPE_STA:
3173 last_seq = &priv->last_seq_num;
3174 last_frag = &priv->last_frag_num;
3175 last_time = &priv->last_packet_time;
3176 break;
3177 default:
3178 return 0;
3179 }
3180 if ((*last_seq == seq) &&
3181 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3182 if (*last_frag == frag)
3183 goto drop;
3184 if (*last_frag + 1 != frag)
3185 /* out-of-order fragment */
3186 goto drop;
3187 } else
3188 *last_seq = seq;
3189
3190 *last_frag = frag;
3191 *last_time = jiffies;
3192 return 0;
3193
3194 drop:
3195 return 1;
3196 }
3197
3198 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3199
3200 #include "iwl-spectrum.h"
3201
3202 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3203 #define BEACON_TIME_MASK_HIGH 0xFF000000
3204 #define TIME_UNIT 1024
3205
3206 /*
3207 * extended beacon time format
3208 * time in usec will be changed into a 32-bit value in 8:24 format
3209 * the high 1 byte is the beacon counts
3210 * the lower 3 bytes is the time in usec within one beacon interval
3211 */
3212
3213 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3214 {
3215 u32 quot;
3216 u32 rem;
3217 u32 interval = beacon_interval * 1024;
3218
3219 if (!interval || !usec)
3220 return 0;
3221
3222 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3223 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3224
3225 return (quot << 24) + rem;
3226 }
3227
3228 /* base is usually what we get from ucode with each received frame,
3229 * the same as HW timer counter counting down
3230 */
3231
3232 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3233 {
3234 u32 base_low = base & BEACON_TIME_MASK_LOW;
3235 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3236 u32 interval = beacon_interval * TIME_UNIT;
3237 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3238 (addon & BEACON_TIME_MASK_HIGH);
3239
3240 if (base_low > addon_low)
3241 res += base_low - addon_low;
3242 else if (base_low < addon_low) {
3243 res += interval + base_low - addon_low;
3244 res += (1 << 24);
3245 } else
3246 res += (1 << 24);
3247
3248 return cpu_to_le32(res);
3249 }
3250
3251 static int iwl_get_measurement(struct iwl_priv *priv,
3252 struct ieee80211_measurement_params *params,
3253 u8 type)
3254 {
3255 struct iwl_spectrum_cmd spectrum;
3256 struct iwl_rx_packet *res;
3257 struct iwl_host_cmd cmd = {
3258 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3259 .data = (void *)&spectrum,
3260 .meta.flags = CMD_WANT_SKB,
3261 };
3262 u32 add_time = le64_to_cpu(params->start_time);
3263 int rc;
3264 int spectrum_resp_status;
3265 int duration = le16_to_cpu(params->duration);
3266
3267 if (iwl_is_associated(priv))
3268 add_time =
3269 iwl_usecs_to_beacons(
3270 le64_to_cpu(params->start_time) - priv->last_tsf,
3271 le16_to_cpu(priv->rxon_timing.beacon_interval));
3272
3273 memset(&spectrum, 0, sizeof(spectrum));
3274
3275 spectrum.channel_count = cpu_to_le16(1);
3276 spectrum.flags =
3277 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3278 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3279 cmd.len = sizeof(spectrum);
3280 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3281
3282 if (iwl_is_associated(priv))
3283 spectrum.start_time =
3284 iwl_add_beacon_time(priv->last_beacon_time,
3285 add_time,
3286 le16_to_cpu(priv->rxon_timing.beacon_interval));
3287 else
3288 spectrum.start_time = 0;
3289
3290 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3291 spectrum.channels[0].channel = params->channel;
3292 spectrum.channels[0].type = type;
3293 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3294 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3295 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3296
3297 rc = iwl_send_cmd_sync(priv, &cmd);
3298 if (rc)
3299 return rc;
3300
3301 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3302 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3303 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3304 rc = -EIO;
3305 }
3306
3307 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3308 switch (spectrum_resp_status) {
3309 case 0: /* Command will be handled */
3310 if (res->u.spectrum.id != 0xff) {
3311 IWL_DEBUG_INFO
3312 ("Replaced existing measurement: %d\n",
3313 res->u.spectrum.id);
3314 priv->measurement_status &= ~MEASUREMENT_READY;
3315 }
3316 priv->measurement_status |= MEASUREMENT_ACTIVE;
3317 rc = 0;
3318 break;
3319
3320 case 1: /* Command will not be handled */
3321 rc = -EAGAIN;
3322 break;
3323 }
3324
3325 dev_kfree_skb_any(cmd.meta.u.skb);
3326
3327 return rc;
3328 }
3329 #endif
3330
3331 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3332 struct iwl_tx_info *tx_sta)
3333 {
3334
3335 tx_sta->status.ack_signal = 0;
3336 tx_sta->status.excessive_retries = 0;
3337 tx_sta->status.queue_length = 0;
3338 tx_sta->status.queue_number = 0;
3339
3340 if (in_interrupt())
3341 ieee80211_tx_status_irqsafe(priv->hw,
3342 tx_sta->skb[0], &(tx_sta->status));
3343 else
3344 ieee80211_tx_status(priv->hw,
3345 tx_sta->skb[0], &(tx_sta->status));
3346
3347 tx_sta->skb[0] = NULL;
3348 }
3349
3350 /**
3351 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3352 *
3353 * When FW advances 'R' index, all entries between old and
3354 * new 'R' index need to be reclaimed. As result, some free space
3355 * forms. If there is enough free space (> low mark), wake Tx queue.
3356 */
3357 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3358 {
3359 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3360 struct iwl_queue *q = &txq->q;
3361 int nfreed = 0;
3362
3363 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3364 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3365 "is out of range [0-%d] %d %d.\n", txq_id,
3366 index, q->n_bd, q->first_empty, q->last_used);
3367 return 0;
3368 }
3369
3370 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3371 q->last_used != index;
3372 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3373 if (txq_id != IWL_CMD_QUEUE_NUM) {
3374 iwl_txstatus_to_ieee(priv,
3375 &(txq->txb[txq->q.last_used]));
3376 iwl_hw_txq_free_tfd(priv, txq);
3377 } else if (nfreed > 1) {
3378 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3379 q->first_empty, q->last_used);
3380 queue_work(priv->workqueue, &priv->restart);
3381 }
3382 nfreed++;
3383 }
3384
3385 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3386 (txq_id != IWL_CMD_QUEUE_NUM) &&
3387 priv->mac80211_registered)
3388 ieee80211_wake_queue(priv->hw, txq_id);
3389
3390
3391 return nfreed;
3392 }
3393
3394 static int iwl_is_tx_success(u32 status)
3395 {
3396 return (status & 0xFF) == 0x1;
3397 }
3398
3399 /******************************************************************************
3400 *
3401 * Generic RX handler implementations
3402 *
3403 ******************************************************************************/
3404 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3405 struct iwl_rx_mem_buffer *rxb)
3406 {
3407 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3408 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3409 int txq_id = SEQ_TO_QUEUE(sequence);
3410 int index = SEQ_TO_INDEX(sequence);
3411 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3412 struct ieee80211_tx_status *tx_status;
3413 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3414 u32 status = le32_to_cpu(tx_resp->status);
3415
3416 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3417 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3418 "is out of range [0-%d] %d %d\n", txq_id,
3419 index, txq->q.n_bd, txq->q.first_empty,
3420 txq->q.last_used);
3421 return;
3422 }
3423
3424 tx_status = &(txq->txb[txq->q.last_used].status);
3425
3426 tx_status->retry_count = tx_resp->failure_frame;
3427 tx_status->queue_number = status;
3428 tx_status->queue_length = tx_resp->bt_kill_count;
3429 tx_status->queue_length |= tx_resp->failure_rts;
3430
3431 tx_status->flags =
3432 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3433
3434 tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3435
3436 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3437 txq_id, iwl_get_tx_fail_reason(status), status,
3438 tx_resp->rate, tx_resp->failure_frame);
3439
3440 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3441 if (index != -1)
3442 iwl_tx_queue_reclaim(priv, txq_id, index);
3443
3444 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3445 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3446 }
3447
3448
3449 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3450 struct iwl_rx_mem_buffer *rxb)
3451 {
3452 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3453 struct iwl_alive_resp *palive;
3454 struct delayed_work *pwork;
3455
3456 palive = &pkt->u.alive_frame;
3457
3458 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3459 "0x%01X 0x%01X\n",
3460 palive->is_valid, palive->ver_type,
3461 palive->ver_subtype);
3462
3463 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3464 IWL_DEBUG_INFO("Initialization Alive received.\n");
3465 memcpy(&priv->card_alive_init,
3466 &pkt->u.alive_frame,
3467 sizeof(struct iwl_init_alive_resp));
3468 pwork = &priv->init_alive_start;
3469 } else {
3470 IWL_DEBUG_INFO("Runtime Alive received.\n");
3471 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3472 sizeof(struct iwl_alive_resp));
3473 pwork = &priv->alive_start;
3474 iwl_disable_events(priv);
3475 }
3476
3477 /* We delay the ALIVE response by 5ms to
3478 * give the HW RF Kill time to activate... */
3479 if (palive->is_valid == UCODE_VALID_OK)
3480 queue_delayed_work(priv->workqueue, pwork,
3481 msecs_to_jiffies(5));
3482 else
3483 IWL_WARNING("uCode did not respond OK.\n");
3484 }
3485
3486 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3487 struct iwl_rx_mem_buffer *rxb)
3488 {
3489 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3490
3491 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3492 return;
3493 }
3494
3495 static void iwl_rx_reply_error(struct iwl_priv *priv,
3496 struct iwl_rx_mem_buffer *rxb)
3497 {
3498 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3499
3500 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3501 "seq 0x%04X ser 0x%08X\n",
3502 le32_to_cpu(pkt->u.err_resp.error_type),
3503 get_cmd_string(pkt->u.err_resp.cmd_id),
3504 pkt->u.err_resp.cmd_id,
3505 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3506 le32_to_cpu(pkt->u.err_resp.error_info));
3507 }
3508
3509 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3510
3511 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3512 {
3513 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3514 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3515 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3516 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3517 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3518 rxon->channel = csa->channel;
3519 priv->staging_rxon.channel = csa->channel;
3520 }
3521
3522 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3523 struct iwl_rx_mem_buffer *rxb)
3524 {
3525 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3526 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3527 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3528
3529 if (!report->state) {
3530 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3531 "Spectrum Measure Notification: Start\n");
3532 return;
3533 }
3534
3535 memcpy(&priv->measure_report, report, sizeof(*report));
3536 priv->measurement_status |= MEASUREMENT_READY;
3537 #endif
3538 }
3539
3540 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3541 struct iwl_rx_mem_buffer *rxb)
3542 {
3543 #ifdef CONFIG_IWLWIFI_DEBUG
3544 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3545 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3546 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3547 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3548 #endif
3549 }
3550
3551 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3552 struct iwl_rx_mem_buffer *rxb)
3553 {
3554 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3555 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3556 "notification for %s:\n",
3557 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3558 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3559 }
3560
3561 static void iwl_bg_beacon_update(struct work_struct *work)
3562 {
3563 struct iwl_priv *priv =
3564 container_of(work, struct iwl_priv, beacon_update);
3565 struct sk_buff *beacon;
3566
3567 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3568 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3569
3570 if (!beacon) {
3571 IWL_ERROR("update beacon failed\n");
3572 return;
3573 }
3574
3575 mutex_lock(&priv->mutex);
3576 /* new beacon skb is allocated every time; dispose previous.*/
3577 if (priv->ibss_beacon)
3578 dev_kfree_skb(priv->ibss_beacon);
3579
3580 priv->ibss_beacon = beacon;
3581 mutex_unlock(&priv->mutex);
3582
3583 iwl_send_beacon_cmd(priv);
3584 }
3585
3586 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3587 struct iwl_rx_mem_buffer *rxb)
3588 {
3589 #ifdef CONFIG_IWLWIFI_DEBUG
3590 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3591 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3592 u8 rate = beacon->beacon_notify_hdr.rate;
3593
3594 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3595 "tsf %d %d rate %d\n",
3596 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3597 beacon->beacon_notify_hdr.failure_frame,
3598 le32_to_cpu(beacon->ibss_mgr_status),
3599 le32_to_cpu(beacon->high_tsf),
3600 le32_to_cpu(beacon->low_tsf), rate);
3601 #endif
3602
3603 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3604 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3605 queue_work(priv->workqueue, &priv->beacon_update);
3606 }
3607
3608 /* Service response to REPLY_SCAN_CMD (0x80) */
3609 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3610 struct iwl_rx_mem_buffer *rxb)
3611 {
3612 #ifdef CONFIG_IWLWIFI_DEBUG
3613 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3614 struct iwl_scanreq_notification *notif =
3615 (struct iwl_scanreq_notification *)pkt->u.raw;
3616
3617 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3618 #endif
3619 }
3620
3621 /* Service SCAN_START_NOTIFICATION (0x82) */
3622 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3623 struct iwl_rx_mem_buffer *rxb)
3624 {
3625 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3626 struct iwl_scanstart_notification *notif =
3627 (struct iwl_scanstart_notification *)pkt->u.raw;
3628 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3629 IWL_DEBUG_SCAN("Scan start: "
3630 "%d [802.11%s] "
3631 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3632 notif->channel,
3633 notif->band ? "bg" : "a",
3634 notif->tsf_high,
3635 notif->tsf_low, notif->status, notif->beacon_timer);
3636 }
3637
3638 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3639 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3640 struct iwl_rx_mem_buffer *rxb)
3641 {
3642 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3643 struct iwl_scanresults_notification *notif =
3644 (struct iwl_scanresults_notification *)pkt->u.raw;
3645
3646 IWL_DEBUG_SCAN("Scan ch.res: "
3647 "%d [802.11%s] "
3648 "(TSF: 0x%08X:%08X) - %d "
3649 "elapsed=%lu usec (%dms since last)\n",
3650 notif->channel,
3651 notif->band ? "bg" : "a",
3652 le32_to_cpu(notif->tsf_high),
3653 le32_to_cpu(notif->tsf_low),
3654 le32_to_cpu(notif->statistics[0]),
3655 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3656 jiffies_to_msecs(elapsed_jiffies
3657 (priv->last_scan_jiffies, jiffies)));
3658
3659 priv->last_scan_jiffies = jiffies;
3660 }
3661
3662 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3663 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3664 struct iwl_rx_mem_buffer *rxb)
3665 {
3666 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3667 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3668
3669 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3670 scan_notif->scanned_channels,
3671 scan_notif->tsf_low,
3672 scan_notif->tsf_high, scan_notif->status);
3673
3674 /* The HW is no longer scanning */
3675 clear_bit(STATUS_SCAN_HW, &priv->status);
3676
3677 /* The scan completion notification came in, so kill that timer... */
3678 cancel_delayed_work(&priv->scan_check);
3679
3680 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3681 (priv->scan_bands == 2) ? "2.4" : "5.2",
3682 jiffies_to_msecs(elapsed_jiffies
3683 (priv->scan_pass_start, jiffies)));
3684
3685 /* Remove this scanned band from the list
3686 * of pending bands to scan */
3687 priv->scan_bands--;
3688
3689 /* If a request to abort was given, or the scan did not succeed
3690 * then we reset the scan state machine and terminate,
3691 * re-queuing another scan if one has been requested */
3692 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3693 IWL_DEBUG_INFO("Aborted scan completed.\n");
3694 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3695 } else {
3696 /* If there are more bands on this scan pass reschedule */
3697 if (priv->scan_bands > 0)
3698 goto reschedule;
3699 }
3700
3701 priv->last_scan_jiffies = jiffies;
3702 IWL_DEBUG_INFO("Setting scan to off\n");
3703
3704 clear_bit(STATUS_SCANNING, &priv->status);
3705
3706 IWL_DEBUG_INFO("Scan took %dms\n",
3707 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3708
3709 queue_work(priv->workqueue, &priv->scan_completed);
3710
3711 return;
3712
3713 reschedule:
3714 priv->scan_pass_start = jiffies;
3715 queue_work(priv->workqueue, &priv->request_scan);
3716 }
3717
3718 /* Handle notification from uCode that card's power state is changing
3719 * due to software, hardware, or critical temperature RFKILL */
3720 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3721 struct iwl_rx_mem_buffer *rxb)
3722 {
3723 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3724 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3725 unsigned long status = priv->status;
3726
3727 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3728 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3729 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3730
3731 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3732 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3733
3734 if (flags & HW_CARD_DISABLED)
3735 set_bit(STATUS_RF_KILL_HW, &priv->status);
3736 else
3737 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3738
3739
3740 if (flags & SW_CARD_DISABLED)
3741 set_bit(STATUS_RF_KILL_SW, &priv->status);
3742 else
3743 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3744
3745 iwl_scan_cancel(priv);
3746
3747 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3748 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3749 (test_bit(STATUS_RF_KILL_SW, &status) !=
3750 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3751 queue_work(priv->workqueue, &priv->rf_kill);
3752 else
3753 wake_up_interruptible(&priv->wait_command_queue);
3754 }
3755
3756 /**
3757 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3758 *
3759 * Setup the RX handlers for each of the reply types sent from the uCode
3760 * to the host.
3761 *
3762 * This function chains into the hardware specific files for them to setup
3763 * any hardware specific handlers as well.
3764 */
3765 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3766 {
3767 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3768 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3769 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3770 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3771 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3772 iwl_rx_spectrum_measure_notif;
3773 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3774 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3775 iwl_rx_pm_debug_statistics_notif;
3776 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3777
3778 /* NOTE: iwl_rx_statistics is different based on whether
3779 * the build is for the 3945 or the 4965. See the
3780 * corresponding implementation in iwl-XXXX.c
3781 *
3782 * The same handler is used for both the REPLY to a
3783 * discrete statistics request from the host as well as
3784 * for the periodic statistics notification from the uCode
3785 */
3786 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3787 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3788
3789 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3790 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3791 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3792 iwl_rx_scan_results_notif;
3793 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3794 iwl_rx_scan_complete_notif;
3795 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3796 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3797
3798 /* Setup hardware specific Rx handlers */
3799 iwl_hw_rx_handler_setup(priv);
3800 }
3801
3802 /**
3803 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3804 * @rxb: Rx buffer to reclaim
3805 *
3806 * If an Rx buffer has an async callback associated with it the callback
3807 * will be executed. The attached skb (if present) will only be freed
3808 * if the callback returns 1
3809 */
3810 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3811 struct iwl_rx_mem_buffer *rxb)
3812 {
3813 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3814 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3815 int txq_id = SEQ_TO_QUEUE(sequence);
3816 int index = SEQ_TO_INDEX(sequence);
3817 int huge = sequence & SEQ_HUGE_FRAME;
3818 int cmd_index;
3819 struct iwl_cmd *cmd;
3820
3821 /* If a Tx command is being handled and it isn't in the actual
3822 * command queue then there a command routing bug has been introduced
3823 * in the queue management code. */
3824 if (txq_id != IWL_CMD_QUEUE_NUM)
3825 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3826 txq_id, pkt->hdr.cmd);
3827 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3828
3829 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3830 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3831
3832 /* Input error checking is done when commands are added to queue. */
3833 if (cmd->meta.flags & CMD_WANT_SKB) {
3834 cmd->meta.source->u.skb = rxb->skb;
3835 rxb->skb = NULL;
3836 } else if (cmd->meta.u.callback &&
3837 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3838 rxb->skb = NULL;
3839
3840 iwl_tx_queue_reclaim(priv, txq_id, index);
3841
3842 if (!(cmd->meta.flags & CMD_ASYNC)) {
3843 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3844 wake_up_interruptible(&priv->wait_command_queue);
3845 }
3846 }
3847
3848 /************************** RX-FUNCTIONS ****************************/
3849 /*
3850 * Rx theory of operation
3851 *
3852 * The host allocates 32 DMA target addresses and passes the host address
3853 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3854 * 0 to 31
3855 *
3856 * Rx Queue Indexes
3857 * The host/firmware share two index registers for managing the Rx buffers.
3858 *
3859 * The READ index maps to the first position that the firmware may be writing
3860 * to -- the driver can read up to (but not including) this position and get
3861 * good data.
3862 * The READ index is managed by the firmware once the card is enabled.
3863 *
3864 * The WRITE index maps to the last position the driver has read from -- the
3865 * position preceding WRITE is the last slot the firmware can place a packet.
3866 *
3867 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3868 * WRITE = READ.
3869 *
3870 * During initialization the host sets up the READ queue position to the first
3871 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3872 *
3873 * When the firmware places a packet in a buffer it will advance the READ index
3874 * and fire the RX interrupt. The driver can then query the READ index and
3875 * process as many packets as possible, moving the WRITE index forward as it
3876 * resets the Rx queue buffers with new memory.
3877 *
3878 * The management in the driver is as follows:
3879 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3880 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3881 * to replensish the iwl->rxq->rx_free.
3882 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3883 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3884 * 'processed' and 'read' driver indexes as well)
3885 * + A received packet is processed and handed to the kernel network stack,
3886 * detached from the iwl->rxq. The driver 'processed' index is updated.
3887 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3888 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3889 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3890 * were enough free buffers and RX_STALLED is set it is cleared.
3891 *
3892 *
3893 * Driver sequence:
3894 *
3895 * iwl_rx_queue_alloc() Allocates rx_free
3896 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
3897 * iwl_rx_queue_restock
3898 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
3899 * queue, updates firmware pointers, and updates
3900 * the WRITE index. If insufficient rx_free buffers
3901 * are available, schedules iwl_rx_replenish
3902 *
3903 * -- enable interrupts --
3904 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
3905 * READ INDEX, detaching the SKB from the pool.
3906 * Moves the packet buffer from queue to rx_used.
3907 * Calls iwl_rx_queue_restock to refill any empty
3908 * slots.
3909 * ...
3910 *
3911 */
3912
3913 /**
3914 * iwl_rx_queue_space - Return number of free slots available in queue.
3915 */
3916 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3917 {
3918 int s = q->read - q->write;
3919 if (s <= 0)
3920 s += RX_QUEUE_SIZE;
3921 /* keep some buffer to not confuse full and empty queue */
3922 s -= 2;
3923 if (s < 0)
3924 s = 0;
3925 return s;
3926 }
3927
3928 /**
3929 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3930 *
3931 * NOTE: This function has 3945 and 4965 specific code sections
3932 * but is declared in base due to the majority of the
3933 * implementation being the same (only a numeric constant is
3934 * different)
3935 *
3936 */
3937 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3938 {
3939 u32 reg = 0;
3940 int rc = 0;
3941 unsigned long flags;
3942
3943 spin_lock_irqsave(&q->lock, flags);
3944
3945 if (q->need_update == 0)
3946 goto exit_unlock;
3947
3948 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3949 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3950
3951 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3952 iwl_set_bit(priv, CSR_GP_CNTRL,
3953 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3954 goto exit_unlock;
3955 }
3956
3957 rc = iwl_grab_restricted_access(priv);
3958 if (rc)
3959 goto exit_unlock;
3960
3961 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3962 q->write & ~0x7);
3963 iwl_release_restricted_access(priv);
3964 } else
3965 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3966
3967
3968 q->need_update = 0;
3969
3970 exit_unlock:
3971 spin_unlock_irqrestore(&q->lock, flags);
3972 return rc;
3973 }
3974
3975 /**
3976 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3977 *
3978 * NOTE: This function has 3945 and 4965 specific code paths in it.
3979 */
3980 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3981 dma_addr_t dma_addr)
3982 {
3983 return cpu_to_le32((u32)dma_addr);
3984 }
3985
3986 /**
3987 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
3988 *
3989 * If there are slots in the RX queue that need to be restocked,
3990 * and we have free pre-allocated buffers, fill the ranks as much
3991 * as we can pulling from rx_free.
3992 *
3993 * This moves the 'write' index forward to catch up with 'processed', and
3994 * also updates the memory address in the firmware to reference the new
3995 * target buffer.
3996 */
3997 int iwl_rx_queue_restock(struct iwl_priv *priv)
3998 {
3999 struct iwl_rx_queue *rxq = &priv->rxq;
4000 struct list_head *element;
4001 struct iwl_rx_mem_buffer *rxb;
4002 unsigned long flags;
4003 int write, rc;
4004
4005 spin_lock_irqsave(&rxq->lock, flags);
4006 write = rxq->write & ~0x7;
4007 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4008 element = rxq->rx_free.next;
4009 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4010 list_del(element);
4011 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4012 rxq->queue[rxq->write] = rxb;
4013 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4014 rxq->free_count--;
4015 }
4016 spin_unlock_irqrestore(&rxq->lock, flags);
4017 /* If the pre-allocated buffer pool is dropping low, schedule to
4018 * refill it */
4019 if (rxq->free_count <= RX_LOW_WATERMARK)
4020 queue_work(priv->workqueue, &priv->rx_replenish);
4021
4022
4023 /* If we've added more space for the firmware to place data, tell it */
4024 if ((write != (rxq->write & ~0x7))
4025 || (abs(rxq->write - rxq->read) > 7)) {
4026 spin_lock_irqsave(&rxq->lock, flags);
4027 rxq->need_update = 1;
4028 spin_unlock_irqrestore(&rxq->lock, flags);
4029 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4030 if (rc)
4031 return rc;
4032 }
4033
4034 return 0;
4035 }
4036
4037 /**
4038 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4039 *
4040 * When moving to rx_free an SKB is allocated for the slot.
4041 *
4042 * Also restock the Rx queue via iwl_rx_queue_restock.
4043 * This is called as a scheduled work item (except for during intialization)
4044 */
4045 void iwl_rx_replenish(void *data)
4046 {
4047 struct iwl_priv *priv = data;
4048 struct iwl_rx_queue *rxq = &priv->rxq;
4049 struct list_head *element;
4050 struct iwl_rx_mem_buffer *rxb;
4051 unsigned long flags;
4052 spin_lock_irqsave(&rxq->lock, flags);
4053 while (!list_empty(&rxq->rx_used)) {
4054 element = rxq->rx_used.next;
4055 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4056 rxb->skb =
4057 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4058 if (!rxb->skb) {
4059 if (net_ratelimit())
4060 printk(KERN_CRIT DRV_NAME
4061 ": Can not allocate SKB buffers\n");
4062 /* We don't reschedule replenish work here -- we will
4063 * call the restock method and if it still needs
4064 * more buffers it will schedule replenish */
4065 break;
4066 }
4067 priv->alloc_rxb_skb++;
4068 list_del(element);
4069 rxb->dma_addr =
4070 pci_map_single(priv->pci_dev, rxb->skb->data,
4071 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4072 list_add_tail(&rxb->list, &rxq->rx_free);
4073 rxq->free_count++;
4074 }
4075 spin_unlock_irqrestore(&rxq->lock, flags);
4076
4077 spin_lock_irqsave(&priv->lock, flags);
4078 iwl_rx_queue_restock(priv);
4079 spin_unlock_irqrestore(&priv->lock, flags);
4080 }
4081
4082 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4083 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4084 * This free routine walks the list of POOL entries and if SKB is set to
4085 * non NULL it is unmapped and freed
4086 */
4087 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4088 {
4089 int i;
4090 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4091 if (rxq->pool[i].skb != NULL) {
4092 pci_unmap_single(priv->pci_dev,
4093 rxq->pool[i].dma_addr,
4094 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4095 dev_kfree_skb(rxq->pool[i].skb);
4096 }
4097 }
4098
4099 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4100 rxq->dma_addr);
4101 rxq->bd = NULL;
4102 }
4103
4104 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4105 {
4106 struct iwl_rx_queue *rxq = &priv->rxq;
4107 struct pci_dev *dev = priv->pci_dev;
4108 int i;
4109
4110 spin_lock_init(&rxq->lock);
4111 INIT_LIST_HEAD(&rxq->rx_free);
4112 INIT_LIST_HEAD(&rxq->rx_used);
4113 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4114 if (!rxq->bd)
4115 return -ENOMEM;
4116 /* Fill the rx_used queue with _all_ of the Rx buffers */
4117 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4118 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4119 /* Set us so that we have processed and used all buffers, but have
4120 * not restocked the Rx queue with fresh buffers */
4121 rxq->read = rxq->write = 0;
4122 rxq->free_count = 0;
4123 rxq->need_update = 0;
4124 return 0;
4125 }
4126
4127 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4128 {
4129 unsigned long flags;
4130 int i;
4131 spin_lock_irqsave(&rxq->lock, flags);
4132 INIT_LIST_HEAD(&rxq->rx_free);
4133 INIT_LIST_HEAD(&rxq->rx_used);
4134 /* Fill the rx_used queue with _all_ of the Rx buffers */
4135 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4136 /* In the reset function, these buffers may have been allocated
4137 * to an SKB, so we need to unmap and free potential storage */
4138 if (rxq->pool[i].skb != NULL) {
4139 pci_unmap_single(priv->pci_dev,
4140 rxq->pool[i].dma_addr,
4141 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4142 priv->alloc_rxb_skb--;
4143 dev_kfree_skb(rxq->pool[i].skb);
4144 rxq->pool[i].skb = NULL;
4145 }
4146 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4147 }
4148
4149 /* Set us so that we have processed and used all buffers, but have
4150 * not restocked the Rx queue with fresh buffers */
4151 rxq->read = rxq->write = 0;
4152 rxq->free_count = 0;
4153 spin_unlock_irqrestore(&rxq->lock, flags);
4154 }
4155
4156 /* Convert linear signal-to-noise ratio into dB */
4157 static u8 ratio2dB[100] = {
4158 /* 0 1 2 3 4 5 6 7 8 9 */
4159 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4160 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4161 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4162 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4163 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4164 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4165 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4166 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4167 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4168 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4169 };
4170
4171 /* Calculates a relative dB value from a ratio of linear
4172 * (i.e. not dB) signal levels.
4173 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4174 int iwl_calc_db_from_ratio(int sig_ratio)
4175 {
4176 /* Anything above 1000:1 just report as 60 dB */
4177 if (sig_ratio > 1000)
4178 return 60;
4179
4180 /* Above 100:1, divide by 10 and use table,
4181 * add 20 dB to make up for divide by 10 */
4182 if (sig_ratio > 100)
4183 return (20 + (int)ratio2dB[sig_ratio/10]);
4184
4185 /* We shouldn't see this */
4186 if (sig_ratio < 1)
4187 return 0;
4188
4189 /* Use table for ratios 1:1 - 99:1 */
4190 return (int)ratio2dB[sig_ratio];
4191 }
4192
4193 #define PERFECT_RSSI (-20) /* dBm */
4194 #define WORST_RSSI (-95) /* dBm */
4195 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4196
4197 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4198 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4199 * about formulas used below. */
4200 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4201 {
4202 int sig_qual;
4203 int degradation = PERFECT_RSSI - rssi_dbm;
4204
4205 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4206 * as indicator; formula is (signal dbm - noise dbm).
4207 * SNR at or above 40 is a great signal (100%).
4208 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4209 * Weakest usable signal is usually 10 - 15 dB SNR. */
4210 if (noise_dbm) {
4211 if (rssi_dbm - noise_dbm >= 40)
4212 return 100;
4213 else if (rssi_dbm < noise_dbm)
4214 return 0;
4215 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4216
4217 /* Else use just the signal level.
4218 * This formula is a least squares fit of data points collected and
4219 * compared with a reference system that had a percentage (%) display
4220 * for signal quality. */
4221 } else
4222 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4223 (15 * RSSI_RANGE + 62 * degradation)) /
4224 (RSSI_RANGE * RSSI_RANGE);
4225
4226 if (sig_qual > 100)
4227 sig_qual = 100;
4228 else if (sig_qual < 1)
4229 sig_qual = 0;
4230
4231 return sig_qual;
4232 }
4233
4234 /**
4235 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4236 *
4237 * Uses the priv->rx_handlers callback function array to invoke
4238 * the appropriate handlers, including command responses,
4239 * frame-received notifications, and other notifications.
4240 */
4241 static void iwl_rx_handle(struct iwl_priv *priv)
4242 {
4243 struct iwl_rx_mem_buffer *rxb;
4244 struct iwl_rx_packet *pkt;
4245 struct iwl_rx_queue *rxq = &priv->rxq;
4246 u32 r, i;
4247 int reclaim;
4248 unsigned long flags;
4249
4250 r = iwl_hw_get_rx_read(priv);
4251 i = rxq->read;
4252
4253 /* Rx interrupt, but nothing sent from uCode */
4254 if (i == r)
4255 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4256
4257 while (i != r) {
4258 rxb = rxq->queue[i];
4259
4260 /* If an RXB doesn't have a queue slot associated with it
4261 * then a bug has been introduced in the queue refilling
4262 * routines -- catch it here */
4263 BUG_ON(rxb == NULL);
4264
4265 rxq->queue[i] = NULL;
4266
4267 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4268 IWL_RX_BUF_SIZE,
4269 PCI_DMA_FROMDEVICE);
4270 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4271
4272 /* Reclaim a command buffer only if this packet is a response
4273 * to a (driver-originated) command.
4274 * If the packet (e.g. Rx frame) originated from uCode,
4275 * there is no command buffer to reclaim.
4276 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4277 * but apparently a few don't get set; catch them here. */
4278 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4279 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4280 (pkt->hdr.cmd != REPLY_TX);
4281
4282 /* Based on type of command response or notification,
4283 * handle those that need handling via function in
4284 * rx_handlers table. See iwl_setup_rx_handlers() */
4285 if (priv->rx_handlers[pkt->hdr.cmd]) {
4286 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4287 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4288 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4289 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4290 } else {
4291 /* No handling needed */
4292 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4293 "r %d i %d No handler needed for %s, 0x%02x\n",
4294 r, i, get_cmd_string(pkt->hdr.cmd),
4295 pkt->hdr.cmd);
4296 }
4297
4298 if (reclaim) {
4299 /* Invoke any callbacks, transfer the skb to caller,
4300 * and fire off the (possibly) blocking iwl_send_cmd()
4301 * as we reclaim the driver command queue */
4302 if (rxb && rxb->skb)
4303 iwl_tx_cmd_complete(priv, rxb);
4304 else
4305 IWL_WARNING("Claim null rxb?\n");
4306 }
4307
4308 /* For now we just don't re-use anything. We can tweak this
4309 * later to try and re-use notification packets and SKBs that
4310 * fail to Rx correctly */
4311 if (rxb->skb != NULL) {
4312 priv->alloc_rxb_skb--;
4313 dev_kfree_skb_any(rxb->skb);
4314 rxb->skb = NULL;
4315 }
4316
4317 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4318 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4319 spin_lock_irqsave(&rxq->lock, flags);
4320 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4321 spin_unlock_irqrestore(&rxq->lock, flags);
4322 i = (i + 1) & RX_QUEUE_MASK;
4323 }
4324
4325 /* Backtrack one entry */
4326 priv->rxq.read = i;
4327 iwl_rx_queue_restock(priv);
4328 }
4329
4330 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4331 struct iwl_tx_queue *txq)
4332 {
4333 u32 reg = 0;
4334 int rc = 0;
4335 int txq_id = txq->q.id;
4336
4337 if (txq->need_update == 0)
4338 return rc;
4339
4340 /* if we're trying to save power */
4341 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4342 /* wake up nic if it's powered down ...
4343 * uCode will wake up, and interrupt us again, so next
4344 * time we'll skip this part. */
4345 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4346
4347 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4348 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4349 iwl_set_bit(priv, CSR_GP_CNTRL,
4350 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4351 return rc;
4352 }
4353
4354 /* restore this queue's parameters in nic hardware. */
4355 rc = iwl_grab_restricted_access(priv);
4356 if (rc)
4357 return rc;
4358 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4359 txq->q.first_empty | (txq_id << 8));
4360 iwl_release_restricted_access(priv);
4361
4362 /* else not in power-save mode, uCode will never sleep when we're
4363 * trying to tx (during RFKILL, we're not trying to tx). */
4364 } else
4365 iwl_write32(priv, HBUS_TARG_WRPTR,
4366 txq->q.first_empty | (txq_id << 8));
4367
4368 txq->need_update = 0;
4369
4370 return rc;
4371 }
4372
4373 #ifdef CONFIG_IWLWIFI_DEBUG
4374 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4375 {
4376 DECLARE_MAC_BUF(mac);
4377
4378 IWL_DEBUG_RADIO("RX CONFIG:\n");
4379 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4380 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4381 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4382 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4383 le32_to_cpu(rxon->filter_flags));
4384 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4385 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4386 rxon->ofdm_basic_rates);
4387 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4388 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4389 print_mac(mac, rxon->node_addr));
4390 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4391 print_mac(mac, rxon->bssid_addr));
4392 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4393 }
4394 #endif
4395
4396 static void iwl_enable_interrupts(struct iwl_priv *priv)
4397 {
4398 IWL_DEBUG_ISR("Enabling interrupts\n");
4399 set_bit(STATUS_INT_ENABLED, &priv->status);
4400 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4401 }
4402
4403 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4404 {
4405 clear_bit(STATUS_INT_ENABLED, &priv->status);
4406
4407 /* disable interrupts from uCode/NIC to host */
4408 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4409
4410 /* acknowledge/clear/reset any interrupts still pending
4411 * from uCode or flow handler (Rx/Tx DMA) */
4412 iwl_write32(priv, CSR_INT, 0xffffffff);
4413 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4414 IWL_DEBUG_ISR("Disabled interrupts\n");
4415 }
4416
4417 static const char *desc_lookup(int i)
4418 {
4419 switch (i) {
4420 case 1:
4421 return "FAIL";
4422 case 2:
4423 return "BAD_PARAM";
4424 case 3:
4425 return "BAD_CHECKSUM";
4426 case 4:
4427 return "NMI_INTERRUPT";
4428 case 5:
4429 return "SYSASSERT";
4430 case 6:
4431 return "FATAL_ERROR";
4432 }
4433
4434 return "UNKNOWN";
4435 }
4436
4437 #define ERROR_START_OFFSET (1 * sizeof(u32))
4438 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4439
4440 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4441 {
4442 u32 i;
4443 u32 desc, time, count, base, data1;
4444 u32 blink1, blink2, ilink1, ilink2;
4445 int rc;
4446
4447 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4448
4449 if (!iwl_hw_valid_rtc_data_addr(base)) {
4450 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4451 return;
4452 }
4453
4454 rc = iwl_grab_restricted_access(priv);
4455 if (rc) {
4456 IWL_WARNING("Can not read from adapter at this time.\n");
4457 return;
4458 }
4459
4460 count = iwl_read_restricted_mem(priv, base);
4461
4462 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4463 IWL_ERROR("Start IWL Error Log Dump:\n");
4464 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4465 priv->status, priv->config, count);
4466 }
4467
4468 IWL_ERROR("Desc Time asrtPC blink2 "
4469 "ilink1 nmiPC Line\n");
4470 for (i = ERROR_START_OFFSET;
4471 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4472 i += ERROR_ELEM_SIZE) {
4473 desc = iwl_read_restricted_mem(priv, base + i);
4474 time =
4475 iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4476 blink1 =
4477 iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4478 blink2 =
4479 iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4480 ilink1 =
4481 iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4482 ilink2 =
4483 iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4484 data1 =
4485 iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4486
4487 IWL_ERROR
4488 ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4489 desc_lookup(desc), desc, time, blink1, blink2,
4490 ilink1, ilink2, data1);
4491 }
4492
4493 iwl_release_restricted_access(priv);
4494
4495 }
4496
4497 #define EVENT_START_OFFSET (4 * sizeof(u32))
4498
4499 /**
4500 * iwl_print_event_log - Dump error event log to syslog
4501 *
4502 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4503 */
4504 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4505 u32 num_events, u32 mode)
4506 {
4507 u32 i;
4508 u32 base; /* SRAM byte address of event log header */
4509 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4510 u32 ptr; /* SRAM byte address of log data */
4511 u32 ev, time, data; /* event log data */
4512
4513 if (num_events == 0)
4514 return;
4515
4516 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4517
4518 if (mode == 0)
4519 event_size = 2 * sizeof(u32);
4520 else
4521 event_size = 3 * sizeof(u32);
4522
4523 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4524
4525 /* "time" is actually "data" for mode 0 (no timestamp).
4526 * place event id # at far right for easier visual parsing. */
4527 for (i = 0; i < num_events; i++) {
4528 ev = iwl_read_restricted_mem(priv, ptr);
4529 ptr += sizeof(u32);
4530 time = iwl_read_restricted_mem(priv, ptr);
4531 ptr += sizeof(u32);
4532 if (mode == 0)
4533 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4534 else {
4535 data = iwl_read_restricted_mem(priv, ptr);
4536 ptr += sizeof(u32);
4537 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4538 }
4539 }
4540 }
4541
4542 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4543 {
4544 int rc;
4545 u32 base; /* SRAM byte address of event log header */
4546 u32 capacity; /* event log capacity in # entries */
4547 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4548 u32 num_wraps; /* # times uCode wrapped to top of log */
4549 u32 next_entry; /* index of next entry to be written by uCode */
4550 u32 size; /* # entries that we'll print */
4551
4552 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4553 if (!iwl_hw_valid_rtc_data_addr(base)) {
4554 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4555 return;
4556 }
4557
4558 rc = iwl_grab_restricted_access(priv);
4559 if (rc) {
4560 IWL_WARNING("Can not read from adapter at this time.\n");
4561 return;
4562 }
4563
4564 /* event log header */
4565 capacity = iwl_read_restricted_mem(priv, base);
4566 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4567 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4568 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4569
4570 size = num_wraps ? capacity : next_entry;
4571
4572 /* bail out if nothing in log */
4573 if (size == 0) {
4574 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4575 iwl_release_restricted_access(priv);
4576 return;
4577 }
4578
4579 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4580 size, num_wraps);
4581
4582 /* if uCode has wrapped back to top of log, start at the oldest entry,
4583 * i.e the next one that uCode would fill. */
4584 if (num_wraps)
4585 iwl_print_event_log(priv, next_entry,
4586 capacity - next_entry, mode);
4587
4588 /* (then/else) start at top of log */
4589 iwl_print_event_log(priv, 0, next_entry, mode);
4590
4591 iwl_release_restricted_access(priv);
4592 }
4593
4594 /**
4595 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4596 */
4597 static void iwl_irq_handle_error(struct iwl_priv *priv)
4598 {
4599 /* Set the FW error flag -- cleared on iwl_down */
4600 set_bit(STATUS_FW_ERROR, &priv->status);
4601
4602 /* Cancel currently queued command. */
4603 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4604
4605 #ifdef CONFIG_IWLWIFI_DEBUG
4606 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4607 iwl_dump_nic_error_log(priv);
4608 iwl_dump_nic_event_log(priv);
4609 iwl_print_rx_config_cmd(&priv->staging_rxon);
4610 }
4611 #endif
4612
4613 wake_up_interruptible(&priv->wait_command_queue);
4614
4615 /* Keep the restart process from trying to send host
4616 * commands by clearing the INIT status bit */
4617 clear_bit(STATUS_READY, &priv->status);
4618
4619 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4620 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4621 "Restarting adapter due to uCode error.\n");
4622
4623 if (iwl_is_associated(priv)) {
4624 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4625 sizeof(priv->recovery_rxon));
4626 priv->error_recovering = 1;
4627 }
4628 queue_work(priv->workqueue, &priv->restart);
4629 }
4630 }
4631
4632 static void iwl_error_recovery(struct iwl_priv *priv)
4633 {
4634 unsigned long flags;
4635
4636 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4637 sizeof(priv->staging_rxon));
4638 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4639 iwl_commit_rxon(priv);
4640
4641 iwl_add_station(priv, priv->bssid, 1, 0);
4642
4643 spin_lock_irqsave(&priv->lock, flags);
4644 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4645 priv->error_recovering = 0;
4646 spin_unlock_irqrestore(&priv->lock, flags);
4647 }
4648
4649 static void iwl_irq_tasklet(struct iwl_priv *priv)
4650 {
4651 u32 inta, handled = 0;
4652 u32 inta_fh;
4653 unsigned long flags;
4654 #ifdef CONFIG_IWLWIFI_DEBUG
4655 u32 inta_mask;
4656 #endif
4657
4658 spin_lock_irqsave(&priv->lock, flags);
4659
4660 /* Ack/clear/reset pending uCode interrupts.
4661 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4662 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4663 inta = iwl_read32(priv, CSR_INT);
4664 iwl_write32(priv, CSR_INT, inta);
4665
4666 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4667 * Any new interrupts that happen after this, either while we're
4668 * in this tasklet, or later, will show up in next ISR/tasklet. */
4669 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4670 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4671
4672 #ifdef CONFIG_IWLWIFI_DEBUG
4673 if (iwl_debug_level & IWL_DL_ISR) {
4674 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4675 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4676 inta, inta_mask, inta_fh);
4677 }
4678 #endif
4679
4680 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4681 * atomic, make sure that inta covers all the interrupts that
4682 * we've discovered, even if FH interrupt came in just after
4683 * reading CSR_INT. */
4684 if (inta_fh & CSR_FH_INT_RX_MASK)
4685 inta |= CSR_INT_BIT_FH_RX;
4686 if (inta_fh & CSR_FH_INT_TX_MASK)
4687 inta |= CSR_INT_BIT_FH_TX;
4688
4689 /* Now service all interrupt bits discovered above. */
4690 if (inta & CSR_INT_BIT_HW_ERR) {
4691 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4692
4693 /* Tell the device to stop sending interrupts */
4694 iwl_disable_interrupts(priv);
4695
4696 iwl_irq_handle_error(priv);
4697
4698 handled |= CSR_INT_BIT_HW_ERR;
4699
4700 spin_unlock_irqrestore(&priv->lock, flags);
4701
4702 return;
4703 }
4704
4705 #ifdef CONFIG_IWLWIFI_DEBUG
4706 if (iwl_debug_level & (IWL_DL_ISR)) {
4707 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4708 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4709 IWL_DEBUG_ISR("Microcode started or stopped.\n");
4710
4711 /* Alive notification via Rx interrupt will do the real work */
4712 if (inta & CSR_INT_BIT_ALIVE)
4713 IWL_DEBUG_ISR("Alive interrupt\n");
4714 }
4715 #endif
4716 /* Safely ignore these bits for debug checks below */
4717 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4718
4719 /* HW RF KILL switch toggled (4965 only) */
4720 if (inta & CSR_INT_BIT_RF_KILL) {
4721 int hw_rf_kill = 0;
4722 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4723 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4724 hw_rf_kill = 1;
4725
4726 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4727 "RF_KILL bit toggled to %s.\n",
4728 hw_rf_kill ? "disable radio":"enable radio");
4729
4730 /* Queue restart only if RF_KILL switch was set to "kill"
4731 * when we loaded driver, and is now set to "enable".
4732 * After we're Alive, RF_KILL gets handled by
4733 * iwl_rx_card_state_notif() */
4734 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4735 queue_work(priv->workqueue, &priv->restart);
4736
4737 handled |= CSR_INT_BIT_RF_KILL;
4738 }
4739
4740 /* Chip got too hot and stopped itself (4965 only) */
4741 if (inta & CSR_INT_BIT_CT_KILL) {
4742 IWL_ERROR("Microcode CT kill error detected.\n");
4743 handled |= CSR_INT_BIT_CT_KILL;
4744 }
4745
4746 /* Error detected by uCode */
4747 if (inta & CSR_INT_BIT_SW_ERR) {
4748 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4749 inta);
4750 iwl_irq_handle_error(priv);
4751 handled |= CSR_INT_BIT_SW_ERR;
4752 }
4753
4754 /* uCode wakes up after power-down sleep */
4755 if (inta & CSR_INT_BIT_WAKEUP) {
4756 IWL_DEBUG_ISR("Wakeup interrupt\n");
4757 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4758 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4759 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4760 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4761 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4762 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4763 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4764
4765 handled |= CSR_INT_BIT_WAKEUP;
4766 }
4767
4768 /* All uCode command responses, including Tx command responses,
4769 * Rx "responses" (frame-received notification), and other
4770 * notifications from uCode come through here*/
4771 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4772 iwl_rx_handle(priv);
4773 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4774 }
4775
4776 if (inta & CSR_INT_BIT_FH_TX) {
4777 IWL_DEBUG_ISR("Tx interrupt\n");
4778
4779 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4780 if (!iwl_grab_restricted_access(priv)) {
4781 iwl_write_restricted(priv,
4782 FH_TCSR_CREDIT
4783 (ALM_FH_SRVC_CHNL), 0x0);
4784 iwl_release_restricted_access(priv);
4785 }
4786 handled |= CSR_INT_BIT_FH_TX;
4787 }
4788
4789 if (inta & ~handled)
4790 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4791
4792 if (inta & ~CSR_INI_SET_MASK) {
4793 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4794 inta & ~CSR_INI_SET_MASK);
4795 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4796 }
4797
4798 /* Re-enable all interrupts */
4799 iwl_enable_interrupts(priv);
4800
4801 #ifdef CONFIG_IWLWIFI_DEBUG
4802 if (iwl_debug_level & (IWL_DL_ISR)) {
4803 inta = iwl_read32(priv, CSR_INT);
4804 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4805 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4806 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4807 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4808 }
4809 #endif
4810 spin_unlock_irqrestore(&priv->lock, flags);
4811 }
4812
4813 static irqreturn_t iwl_isr(int irq, void *data)
4814 {
4815 struct iwl_priv *priv = data;
4816 u32 inta, inta_mask;
4817 u32 inta_fh;
4818 if (!priv)
4819 return IRQ_NONE;
4820
4821 spin_lock(&priv->lock);
4822
4823 /* Disable (but don't clear!) interrupts here to avoid
4824 * back-to-back ISRs and sporadic interrupts from our NIC.
4825 * If we have something to service, the tasklet will re-enable ints.
4826 * If we *don't* have something, we'll re-enable before leaving here. */
4827 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4828 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4829
4830 /* Discover which interrupts are active/pending */
4831 inta = iwl_read32(priv, CSR_INT);
4832 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4833
4834 /* Ignore interrupt if there's nothing in NIC to service.
4835 * This may be due to IRQ shared with another device,
4836 * or due to sporadic interrupts thrown from our NIC. */
4837 if (!inta && !inta_fh) {
4838 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4839 goto none;
4840 }
4841
4842 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4843 /* Hardware disappeared */
4844 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4845 goto none;
4846 }
4847
4848 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4849 inta, inta_mask, inta_fh);
4850
4851 /* iwl_irq_tasklet() will service interrupts and re-enable them */
4852 tasklet_schedule(&priv->irq_tasklet);
4853 spin_unlock(&priv->lock);
4854
4855 return IRQ_HANDLED;
4856
4857 none:
4858 /* re-enable interrupts here since we don't have anything to service. */
4859 iwl_enable_interrupts(priv);
4860 spin_unlock(&priv->lock);
4861 return IRQ_NONE;
4862 }
4863
4864 /************************** EEPROM BANDS ****************************
4865 *
4866 * The iwl_eeprom_band definitions below provide the mapping from the
4867 * EEPROM contents to the specific channel number supported for each
4868 * band.
4869 *
4870 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4871 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4872 * The specific geography and calibration information for that channel
4873 * is contained in the eeprom map itself.
4874 *
4875 * During init, we copy the eeprom information and channel map
4876 * information into priv->channel_info_24/52 and priv->channel_map_24/52
4877 *
4878 * channel_map_24/52 provides the index in the channel_info array for a
4879 * given channel. We have to have two separate maps as there is channel
4880 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4881 * band_2
4882 *
4883 * A value of 0xff stored in the channel_map indicates that the channel
4884 * is not supported by the hardware at all.
4885 *
4886 * A value of 0xfe in the channel_map indicates that the channel is not
4887 * valid for Tx with the current hardware. This means that
4888 * while the system can tune and receive on a given channel, it may not
4889 * be able to associate or transmit any frames on that
4890 * channel. There is no corresponding channel information for that
4891 * entry.
4892 *
4893 *********************************************************************/
4894
4895 /* 2.4 GHz */
4896 static const u8 iwl_eeprom_band_1[14] = {
4897 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4898 };
4899
4900 /* 5.2 GHz bands */
4901 static const u8 iwl_eeprom_band_2[] = {
4902 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4903 };
4904
4905 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4906 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4907 };
4908
4909 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4910 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4911 };
4912
4913 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4914 145, 149, 153, 157, 161, 165
4915 };
4916
4917 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4918 int *eeprom_ch_count,
4919 const struct iwl_eeprom_channel
4920 **eeprom_ch_info,
4921 const u8 **eeprom_ch_index)
4922 {
4923 switch (band) {
4924 case 1: /* 2.4GHz band */
4925 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4926 *eeprom_ch_info = priv->eeprom.band_1_channels;
4927 *eeprom_ch_index = iwl_eeprom_band_1;
4928 break;
4929 case 2: /* 5.2GHz band */
4930 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4931 *eeprom_ch_info = priv->eeprom.band_2_channels;
4932 *eeprom_ch_index = iwl_eeprom_band_2;
4933 break;
4934 case 3: /* 5.2GHz band */
4935 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4936 *eeprom_ch_info = priv->eeprom.band_3_channels;
4937 *eeprom_ch_index = iwl_eeprom_band_3;
4938 break;
4939 case 4: /* 5.2GHz band */
4940 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4941 *eeprom_ch_info = priv->eeprom.band_4_channels;
4942 *eeprom_ch_index = iwl_eeprom_band_4;
4943 break;
4944 case 5: /* 5.2GHz band */
4945 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4946 *eeprom_ch_info = priv->eeprom.band_5_channels;
4947 *eeprom_ch_index = iwl_eeprom_band_5;
4948 break;
4949 default:
4950 BUG();
4951 return;
4952 }
4953 }
4954
4955 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4956 int phymode, u16 channel)
4957 {
4958 int i;
4959
4960 switch (phymode) {
4961 case MODE_IEEE80211A:
4962 for (i = 14; i < priv->channel_count; i++) {
4963 if (priv->channel_info[i].channel == channel)
4964 return &priv->channel_info[i];
4965 }
4966 break;
4967
4968 case MODE_IEEE80211B:
4969 case MODE_IEEE80211G:
4970 if (channel >= 1 && channel <= 14)
4971 return &priv->channel_info[channel - 1];
4972 break;
4973
4974 }
4975
4976 return NULL;
4977 }
4978
4979 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4980 ? # x " " : "")
4981
4982 static int iwl_init_channel_map(struct iwl_priv *priv)
4983 {
4984 int eeprom_ch_count = 0;
4985 const u8 *eeprom_ch_index = NULL;
4986 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4987 int band, ch;
4988 struct iwl_channel_info *ch_info;
4989
4990 if (priv->channel_count) {
4991 IWL_DEBUG_INFO("Channel map already initialized.\n");
4992 return 0;
4993 }
4994
4995 if (priv->eeprom.version < 0x2f) {
4996 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4997 priv->eeprom.version);
4998 return -EINVAL;
4999 }
5000
5001 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5002
5003 priv->channel_count =
5004 ARRAY_SIZE(iwl_eeprom_band_1) +
5005 ARRAY_SIZE(iwl_eeprom_band_2) +
5006 ARRAY_SIZE(iwl_eeprom_band_3) +
5007 ARRAY_SIZE(iwl_eeprom_band_4) +
5008 ARRAY_SIZE(iwl_eeprom_band_5);
5009
5010 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5011
5012 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5013 priv->channel_count, GFP_KERNEL);
5014 if (!priv->channel_info) {
5015 IWL_ERROR("Could not allocate channel_info\n");
5016 priv->channel_count = 0;
5017 return -ENOMEM;
5018 }
5019
5020 ch_info = priv->channel_info;
5021
5022 /* Loop through the 5 EEPROM bands adding them in order to the
5023 * channel map we maintain (that contains additional information than
5024 * what just in the EEPROM) */
5025 for (band = 1; band <= 5; band++) {
5026
5027 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5028 &eeprom_ch_info, &eeprom_ch_index);
5029
5030 /* Loop through each band adding each of the channels */
5031 for (ch = 0; ch < eeprom_ch_count; ch++) {
5032 ch_info->channel = eeprom_ch_index[ch];
5033 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5034 MODE_IEEE80211A;
5035
5036 /* permanently store EEPROM's channel regulatory flags
5037 * and max power in channel info database. */
5038 ch_info->eeprom = eeprom_ch_info[ch];
5039
5040 /* Copy the run-time flags so they are there even on
5041 * invalid channels */
5042 ch_info->flags = eeprom_ch_info[ch].flags;
5043
5044 if (!(is_channel_valid(ch_info))) {
5045 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5046 "No traffic\n",
5047 ch_info->channel,
5048 ch_info->flags,
5049 is_channel_a_band(ch_info) ?
5050 "5.2" : "2.4");
5051 ch_info++;
5052 continue;
5053 }
5054
5055 /* Initialize regulatory-based run-time data */
5056 ch_info->max_power_avg = ch_info->curr_txpow =
5057 eeprom_ch_info[ch].max_power_avg;
5058 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5059 ch_info->min_power = 0;
5060
5061 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5062 " %ddBm): Ad-Hoc %ssupported\n",
5063 ch_info->channel,
5064 is_channel_a_band(ch_info) ?
5065 "5.2" : "2.4",
5066 CHECK_AND_PRINT(IBSS),
5067 CHECK_AND_PRINT(ACTIVE),
5068 CHECK_AND_PRINT(RADAR),
5069 CHECK_AND_PRINT(WIDE),
5070 CHECK_AND_PRINT(NARROW),
5071 CHECK_AND_PRINT(DFS),
5072 eeprom_ch_info[ch].flags,
5073 eeprom_ch_info[ch].max_power_avg,
5074 ((eeprom_ch_info[ch].
5075 flags & EEPROM_CHANNEL_IBSS)
5076 && !(eeprom_ch_info[ch].
5077 flags & EEPROM_CHANNEL_RADAR))
5078 ? "" : "not ");
5079
5080 /* Set the user_txpower_limit to the highest power
5081 * supported by any channel */
5082 if (eeprom_ch_info[ch].max_power_avg >
5083 priv->user_txpower_limit)
5084 priv->user_txpower_limit =
5085 eeprom_ch_info[ch].max_power_avg;
5086
5087 ch_info++;
5088 }
5089 }
5090
5091 if (iwl3945_txpower_set_from_eeprom(priv))
5092 return -EIO;
5093
5094 return 0;
5095 }
5096
5097 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5098 * sending probe req. This should be set long enough to hear probe responses
5099 * from more than one AP. */
5100 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5101 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5102
5103 /* For faster active scanning, scan will move to the next channel if fewer than
5104 * PLCP_QUIET_THRESH packets are heard on this channel within
5105 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5106 * time if it's a quiet channel (nothing responded to our probe, and there's
5107 * no other traffic).
5108 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5109 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5110 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5111
5112 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5113 * Must be set longer than active dwell time.
5114 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5115 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5116 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5117 #define IWL_PASSIVE_DWELL_BASE (100)
5118 #define IWL_CHANNEL_TUNE_TIME 5
5119
5120 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5121 {
5122 if (phymode == MODE_IEEE80211A)
5123 return IWL_ACTIVE_DWELL_TIME_52;
5124 else
5125 return IWL_ACTIVE_DWELL_TIME_24;
5126 }
5127
5128 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5129 {
5130 u16 active = iwl_get_active_dwell_time(priv, phymode);
5131 u16 passive = (phymode != MODE_IEEE80211A) ?
5132 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5133 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5134
5135 if (iwl_is_associated(priv)) {
5136 /* If we're associated, we clamp the maximum passive
5137 * dwell time to be 98% of the beacon interval (minus
5138 * 2 * channel tune time) */
5139 passive = priv->beacon_int;
5140 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5141 passive = IWL_PASSIVE_DWELL_BASE;
5142 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5143 }
5144
5145 if (passive <= active)
5146 passive = active + 1;
5147
5148 return passive;
5149 }
5150
5151 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5152 u8 is_active, u8 direct_mask,
5153 struct iwl_scan_channel *scan_ch)
5154 {
5155 const struct ieee80211_channel *channels = NULL;
5156 const struct ieee80211_hw_mode *hw_mode;
5157 const struct iwl_channel_info *ch_info;
5158 u16 passive_dwell = 0;
5159 u16 active_dwell = 0;
5160 int added, i;
5161
5162 hw_mode = iwl_get_hw_mode(priv, phymode);
5163 if (!hw_mode)
5164 return 0;
5165
5166 channels = hw_mode->channels;
5167
5168 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5169 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5170
5171 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5172 if (channels[i].chan ==
5173 le16_to_cpu(priv->active_rxon.channel)) {
5174 if (iwl_is_associated(priv)) {
5175 IWL_DEBUG_SCAN
5176 ("Skipping current channel %d\n",
5177 le16_to_cpu(priv->active_rxon.channel));
5178 continue;
5179 }
5180 } else if (priv->only_active_channel)
5181 continue;
5182
5183 scan_ch->channel = channels[i].chan;
5184
5185 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5186 if (!is_channel_valid(ch_info)) {
5187 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5188 scan_ch->channel);
5189 continue;
5190 }
5191
5192 if (!is_active || is_channel_passive(ch_info) ||
5193 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5194 scan_ch->type = 0; /* passive */
5195 else
5196 scan_ch->type = 1; /* active */
5197
5198 if (scan_ch->type & 1)
5199 scan_ch->type |= (direct_mask << 1);
5200
5201 if (is_channel_narrow(ch_info))
5202 scan_ch->type |= (1 << 7);
5203
5204 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5205 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5206
5207 /* Set power levels to defaults */
5208 scan_ch->tpc.dsp_atten = 110;
5209 /* scan_pwr_info->tpc.dsp_atten; */
5210
5211 /*scan_pwr_info->tpc.tx_gain; */
5212 if (phymode == MODE_IEEE80211A)
5213 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5214 else {
5215 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5216 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5217 * power level
5218 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5219 */
5220 }
5221
5222 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5223 scan_ch->channel,
5224 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5225 (scan_ch->type & 1) ?
5226 active_dwell : passive_dwell);
5227
5228 scan_ch++;
5229 added++;
5230 }
5231
5232 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5233 return added;
5234 }
5235
5236 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5237 {
5238 int i, j;
5239 for (i = 0; i < 3; i++) {
5240 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5241 for (j = 0; j < hw_mode->num_channels; j++)
5242 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5243 }
5244 }
5245
5246 static void iwl_init_hw_rates(struct iwl_priv *priv,
5247 struct ieee80211_rate *rates)
5248 {
5249 int i;
5250
5251 for (i = 0; i < IWL_RATE_COUNT; i++) {
5252 rates[i].rate = iwl_rates[i].ieee * 5;
5253 rates[i].val = i; /* Rate scaling will work on indexes */
5254 rates[i].val2 = i;
5255 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5256 /* Only OFDM have the bits-per-symbol set */
5257 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5258 rates[i].flags |= IEEE80211_RATE_OFDM;
5259 else {
5260 /*
5261 * If CCK 1M then set rate flag to CCK else CCK_2
5262 * which is CCK | PREAMBLE2
5263 */
5264 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5265 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5266 }
5267
5268 /* Set up which ones are basic rates... */
5269 if (IWL_BASIC_RATES_MASK & (1 << i))
5270 rates[i].flags |= IEEE80211_RATE_BASIC;
5271 }
5272 }
5273
5274 /**
5275 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5276 */
5277 static int iwl_init_geos(struct iwl_priv *priv)
5278 {
5279 struct iwl_channel_info *ch;
5280 struct ieee80211_hw_mode *modes;
5281 struct ieee80211_channel *channels;
5282 struct ieee80211_channel *geo_ch;
5283 struct ieee80211_rate *rates;
5284 int i = 0;
5285 enum {
5286 A = 0,
5287 B = 1,
5288 G = 2,
5289 };
5290 int mode_count = 3;
5291
5292 if (priv->modes) {
5293 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5294 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5295 return 0;
5296 }
5297
5298 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5299 GFP_KERNEL);
5300 if (!modes)
5301 return -ENOMEM;
5302
5303 channels = kzalloc(sizeof(struct ieee80211_channel) *
5304 priv->channel_count, GFP_KERNEL);
5305 if (!channels) {
5306 kfree(modes);
5307 return -ENOMEM;
5308 }
5309
5310 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5311 GFP_KERNEL);
5312 if (!rates) {
5313 kfree(modes);
5314 kfree(channels);
5315 return -ENOMEM;
5316 }
5317
5318 /* 0 = 802.11a
5319 * 1 = 802.11b
5320 * 2 = 802.11g
5321 */
5322
5323 /* 5.2GHz channels start after the 2.4GHz channels */
5324 modes[A].mode = MODE_IEEE80211A;
5325 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5326 modes[A].rates = rates;
5327 modes[A].num_rates = 8; /* just OFDM */
5328 modes[A].num_channels = 0;
5329
5330 modes[B].mode = MODE_IEEE80211B;
5331 modes[B].channels = channels;
5332 modes[B].rates = &rates[8];
5333 modes[B].num_rates = 4; /* just CCK */
5334 modes[B].num_channels = 0;
5335
5336 modes[G].mode = MODE_IEEE80211G;
5337 modes[G].channels = channels;
5338 modes[G].rates = rates;
5339 modes[G].num_rates = 12; /* OFDM & CCK */
5340 modes[G].num_channels = 0;
5341
5342 priv->ieee_channels = channels;
5343 priv->ieee_rates = rates;
5344
5345 iwl_init_hw_rates(priv, rates);
5346
5347 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5348 ch = &priv->channel_info[i];
5349
5350 if (!is_channel_valid(ch)) {
5351 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5352 "skipping.\n",
5353 ch->channel, is_channel_a_band(ch) ?
5354 "5.2" : "2.4");
5355 continue;
5356 }
5357
5358 if (is_channel_a_band(ch))
5359 geo_ch = &modes[A].channels[modes[A].num_channels++];
5360 else {
5361 geo_ch = &modes[B].channels[modes[B].num_channels++];
5362 modes[G].num_channels++;
5363 }
5364
5365 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5366 geo_ch->chan = ch->channel;
5367 geo_ch->power_level = ch->max_power_avg;
5368 geo_ch->antenna_max = 0xff;
5369
5370 if (is_channel_valid(ch)) {
5371 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5372 if (ch->flags & EEPROM_CHANNEL_IBSS)
5373 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5374
5375 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5376 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5377
5378 if (ch->flags & EEPROM_CHANNEL_RADAR)
5379 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5380
5381 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5382 priv->max_channel_txpower_limit =
5383 ch->max_power_avg;
5384 }
5385
5386 geo_ch->val = geo_ch->flag;
5387 }
5388
5389 if ((modes[A].num_channels == 0) && priv->is_abg) {
5390 printk(KERN_INFO DRV_NAME
5391 ": Incorrectly detected BG card as ABG. Please send "
5392 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5393 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5394 priv->is_abg = 0;
5395 }
5396
5397 printk(KERN_INFO DRV_NAME
5398 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5399 modes[G].num_channels, modes[A].num_channels);
5400
5401 /*
5402 * NOTE: We register these in preference of order -- the
5403 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5404 * a phymode based on rates or AP capabilities but seems to
5405 * configure it purely on if the channel being configured
5406 * is supported by a mode -- and the first match is taken
5407 */
5408
5409 if (modes[G].num_channels)
5410 ieee80211_register_hwmode(priv->hw, &modes[G]);
5411 if (modes[B].num_channels)
5412 ieee80211_register_hwmode(priv->hw, &modes[B]);
5413 if (modes[A].num_channels)
5414 ieee80211_register_hwmode(priv->hw, &modes[A]);
5415
5416 priv->modes = modes;
5417 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5418
5419 return 0;
5420 }
5421
5422 /******************************************************************************
5423 *
5424 * uCode download functions
5425 *
5426 ******************************************************************************/
5427
5428 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5429 {
5430 if (priv->ucode_code.v_addr != NULL) {
5431 pci_free_consistent(priv->pci_dev,
5432 priv->ucode_code.len,
5433 priv->ucode_code.v_addr,
5434 priv->ucode_code.p_addr);
5435 priv->ucode_code.v_addr = NULL;
5436 }
5437 if (priv->ucode_data.v_addr != NULL) {
5438 pci_free_consistent(priv->pci_dev,
5439 priv->ucode_data.len,
5440 priv->ucode_data.v_addr,
5441 priv->ucode_data.p_addr);
5442 priv->ucode_data.v_addr = NULL;
5443 }
5444 if (priv->ucode_data_backup.v_addr != NULL) {
5445 pci_free_consistent(priv->pci_dev,
5446 priv->ucode_data_backup.len,
5447 priv->ucode_data_backup.v_addr,
5448 priv->ucode_data_backup.p_addr);
5449 priv->ucode_data_backup.v_addr = NULL;
5450 }
5451 if (priv->ucode_init.v_addr != NULL) {
5452 pci_free_consistent(priv->pci_dev,
5453 priv->ucode_init.len,
5454 priv->ucode_init.v_addr,
5455 priv->ucode_init.p_addr);
5456 priv->ucode_init.v_addr = NULL;
5457 }
5458 if (priv->ucode_init_data.v_addr != NULL) {
5459 pci_free_consistent(priv->pci_dev,
5460 priv->ucode_init_data.len,
5461 priv->ucode_init_data.v_addr,
5462 priv->ucode_init_data.p_addr);
5463 priv->ucode_init_data.v_addr = NULL;
5464 }
5465 if (priv->ucode_boot.v_addr != NULL) {
5466 pci_free_consistent(priv->pci_dev,
5467 priv->ucode_boot.len,
5468 priv->ucode_boot.v_addr,
5469 priv->ucode_boot.p_addr);
5470 priv->ucode_boot.v_addr = NULL;
5471 }
5472 }
5473
5474 /**
5475 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5476 * looking at all data.
5477 */
5478 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5479 {
5480 u32 val;
5481 u32 save_len = len;
5482 int rc = 0;
5483 u32 errcnt;
5484
5485 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5486
5487 rc = iwl_grab_restricted_access(priv);
5488 if (rc)
5489 return rc;
5490
5491 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5492
5493 errcnt = 0;
5494 for (; len > 0; len -= sizeof(u32), image++) {
5495 /* read data comes through single port, auto-incr addr */
5496 /* NOTE: Use the debugless read so we don't flood kernel log
5497 * if IWL_DL_IO is set */
5498 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5499 if (val != le32_to_cpu(*image)) {
5500 IWL_ERROR("uCode INST section is invalid at "
5501 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5502 save_len - len, val, le32_to_cpu(*image));
5503 rc = -EIO;
5504 errcnt++;
5505 if (errcnt >= 20)
5506 break;
5507 }
5508 }
5509
5510 iwl_release_restricted_access(priv);
5511
5512 if (!errcnt)
5513 IWL_DEBUG_INFO
5514 ("ucode image in INSTRUCTION memory is good\n");
5515
5516 return rc;
5517 }
5518
5519
5520 /**
5521 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5522 * using sample data 100 bytes apart. If these sample points are good,
5523 * it's a pretty good bet that everything between them is good, too.
5524 */
5525 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5526 {
5527 u32 val;
5528 int rc = 0;
5529 u32 errcnt = 0;
5530 u32 i;
5531
5532 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5533
5534 rc = iwl_grab_restricted_access(priv);
5535 if (rc)
5536 return rc;
5537
5538 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5539 /* read data comes through single port, auto-incr addr */
5540 /* NOTE: Use the debugless read so we don't flood kernel log
5541 * if IWL_DL_IO is set */
5542 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5543 i + RTC_INST_LOWER_BOUND);
5544 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5545 if (val != le32_to_cpu(*image)) {
5546 #if 0 /* Enable this if you want to see details */
5547 IWL_ERROR("uCode INST section is invalid at "
5548 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5549 i, val, *image);
5550 #endif
5551 rc = -EIO;
5552 errcnt++;
5553 if (errcnt >= 3)
5554 break;
5555 }
5556 }
5557
5558 iwl_release_restricted_access(priv);
5559
5560 return rc;
5561 }
5562
5563
5564 /**
5565 * iwl_verify_ucode - determine which instruction image is in SRAM,
5566 * and verify its contents
5567 */
5568 static int iwl_verify_ucode(struct iwl_priv *priv)
5569 {
5570 __le32 *image;
5571 u32 len;
5572 int rc = 0;
5573
5574 /* Try bootstrap */
5575 image = (__le32 *)priv->ucode_boot.v_addr;
5576 len = priv->ucode_boot.len;
5577 rc = iwl_verify_inst_sparse(priv, image, len);
5578 if (rc == 0) {
5579 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5580 return 0;
5581 }
5582
5583 /* Try initialize */
5584 image = (__le32 *)priv->ucode_init.v_addr;
5585 len = priv->ucode_init.len;
5586 rc = iwl_verify_inst_sparse(priv, image, len);
5587 if (rc == 0) {
5588 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5589 return 0;
5590 }
5591
5592 /* Try runtime/protocol */
5593 image = (__le32 *)priv->ucode_code.v_addr;
5594 len = priv->ucode_code.len;
5595 rc = iwl_verify_inst_sparse(priv, image, len);
5596 if (rc == 0) {
5597 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5598 return 0;
5599 }
5600
5601 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5602
5603 /* Show first several data entries in instruction SRAM.
5604 * Selection of bootstrap image is arbitrary. */
5605 image = (__le32 *)priv->ucode_boot.v_addr;
5606 len = priv->ucode_boot.len;
5607 rc = iwl_verify_inst_full(priv, image, len);
5608
5609 return rc;
5610 }
5611
5612
5613 /* check contents of special bootstrap uCode SRAM */
5614 static int iwl_verify_bsm(struct iwl_priv *priv)
5615 {
5616 __le32 *image = priv->ucode_boot.v_addr;
5617 u32 len = priv->ucode_boot.len;
5618 u32 reg;
5619 u32 val;
5620
5621 IWL_DEBUG_INFO("Begin verify bsm\n");
5622
5623 /* verify BSM SRAM contents */
5624 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5625 for (reg = BSM_SRAM_LOWER_BOUND;
5626 reg < BSM_SRAM_LOWER_BOUND + len;
5627 reg += sizeof(u32), image ++) {
5628 val = iwl_read_restricted_reg(priv, reg);
5629 if (val != le32_to_cpu(*image)) {
5630 IWL_ERROR("BSM uCode verification failed at "
5631 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5632 BSM_SRAM_LOWER_BOUND,
5633 reg - BSM_SRAM_LOWER_BOUND, len,
5634 val, le32_to_cpu(*image));
5635 return -EIO;
5636 }
5637 }
5638
5639 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5640
5641 return 0;
5642 }
5643
5644 /**
5645 * iwl_load_bsm - Load bootstrap instructions
5646 *
5647 * BSM operation:
5648 *
5649 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5650 * in special SRAM that does not power down during RFKILL. When powering back
5651 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5652 * the bootstrap program into the on-board processor, and starts it.
5653 *
5654 * The bootstrap program loads (via DMA) instructions and data for a new
5655 * program from host DRAM locations indicated by the host driver in the
5656 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5657 * automatically.
5658 *
5659 * When initializing the NIC, the host driver points the BSM to the
5660 * "initialize" uCode image. This uCode sets up some internal data, then
5661 * notifies host via "initialize alive" that it is complete.
5662 *
5663 * The host then replaces the BSM_DRAM_* pointer values to point to the
5664 * normal runtime uCode instructions and a backup uCode data cache buffer
5665 * (filled initially with starting data values for the on-board processor),
5666 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5667 * which begins normal operation.
5668 *
5669 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5670 * the backup data cache in DRAM before SRAM is powered down.
5671 *
5672 * When powering back up, the BSM loads the bootstrap program. This reloads
5673 * the runtime uCode instructions and the backup data cache into SRAM,
5674 * and re-launches the runtime uCode from where it left off.
5675 */
5676 static int iwl_load_bsm(struct iwl_priv *priv)
5677 {
5678 __le32 *image = priv->ucode_boot.v_addr;
5679 u32 len = priv->ucode_boot.len;
5680 dma_addr_t pinst;
5681 dma_addr_t pdata;
5682 u32 inst_len;
5683 u32 data_len;
5684 int rc;
5685 int i;
5686 u32 done;
5687 u32 reg_offset;
5688
5689 IWL_DEBUG_INFO("Begin load bsm\n");
5690
5691 /* make sure bootstrap program is no larger than BSM's SRAM size */
5692 if (len > IWL_MAX_BSM_SIZE)
5693 return -EINVAL;
5694
5695 /* Tell bootstrap uCode where to find the "Initialize" uCode
5696 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5697 * NOTE: iwl_initialize_alive_start() will replace these values,
5698 * after the "initialize" uCode has run, to point to
5699 * runtime/protocol instructions and backup data cache. */
5700 pinst = priv->ucode_init.p_addr;
5701 pdata = priv->ucode_init_data.p_addr;
5702 inst_len = priv->ucode_init.len;
5703 data_len = priv->ucode_init_data.len;
5704
5705 rc = iwl_grab_restricted_access(priv);
5706 if (rc)
5707 return rc;
5708
5709 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5710 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5711 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5712 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5713
5714 /* Fill BSM memory with bootstrap instructions */
5715 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5716 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5717 reg_offset += sizeof(u32), image++)
5718 _iwl_write_restricted_reg(priv, reg_offset,
5719 le32_to_cpu(*image));
5720
5721 rc = iwl_verify_bsm(priv);
5722 if (rc) {
5723 iwl_release_restricted_access(priv);
5724 return rc;
5725 }
5726
5727 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5728 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5729 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5730 RTC_INST_LOWER_BOUND);
5731 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5732
5733 /* Load bootstrap code into instruction SRAM now,
5734 * to prepare to load "initialize" uCode */
5735 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5736 BSM_WR_CTRL_REG_BIT_START);
5737
5738 /* Wait for load of bootstrap uCode to finish */
5739 for (i = 0; i < 100; i++) {
5740 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5741 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5742 break;
5743 udelay(10);
5744 }
5745 if (i < 100)
5746 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5747 else {
5748 IWL_ERROR("BSM write did not complete!\n");
5749 return -EIO;
5750 }
5751
5752 /* Enable future boot loads whenever power management unit triggers it
5753 * (e.g. when powering back up after power-save shutdown) */
5754 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5755 BSM_WR_CTRL_REG_BIT_START_EN);
5756
5757 iwl_release_restricted_access(priv);
5758
5759 return 0;
5760 }
5761
5762 static void iwl_nic_start(struct iwl_priv *priv)
5763 {
5764 /* Remove all resets to allow NIC to operate */
5765 iwl_write32(priv, CSR_RESET, 0);
5766 }
5767
5768 /**
5769 * iwl_read_ucode - Read uCode images from disk file.
5770 *
5771 * Copy into buffers for card to fetch via bus-mastering
5772 */
5773 static int iwl_read_ucode(struct iwl_priv *priv)
5774 {
5775 struct iwl_ucode *ucode;
5776 int rc = 0;
5777 const struct firmware *ucode_raw;
5778 /* firmware file name contains uCode/driver compatibility version */
5779 const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5780 u8 *src;
5781 size_t len;
5782 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5783
5784 /* Ask kernel firmware_class module to get the boot firmware off disk.
5785 * request_firmware() is synchronous, file is in memory on return. */
5786 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5787 if (rc < 0) {
5788 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5789 goto error;
5790 }
5791
5792 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5793 name, ucode_raw->size);
5794
5795 /* Make sure that we got at least our header! */
5796 if (ucode_raw->size < sizeof(*ucode)) {
5797 IWL_ERROR("File size way too small!\n");
5798 rc = -EINVAL;
5799 goto err_release;
5800 }
5801
5802 /* Data from ucode file: header followed by uCode images */
5803 ucode = (void *)ucode_raw->data;
5804
5805 ver = le32_to_cpu(ucode->ver);
5806 inst_size = le32_to_cpu(ucode->inst_size);
5807 data_size = le32_to_cpu(ucode->data_size);
5808 init_size = le32_to_cpu(ucode->init_size);
5809 init_data_size = le32_to_cpu(ucode->init_data_size);
5810 boot_size = le32_to_cpu(ucode->boot_size);
5811
5812 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5813 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5814 inst_size);
5815 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5816 data_size);
5817 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5818 init_size);
5819 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5820 init_data_size);
5821 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5822 boot_size);
5823
5824 /* Verify size of file vs. image size info in file's header */
5825 if (ucode_raw->size < sizeof(*ucode) +
5826 inst_size + data_size + init_size +
5827 init_data_size + boot_size) {
5828
5829 IWL_DEBUG_INFO("uCode file size %d too small\n",
5830 (int)ucode_raw->size);
5831 rc = -EINVAL;
5832 goto err_release;
5833 }
5834
5835 /* Verify that uCode images will fit in card's SRAM */
5836 if (inst_size > IWL_MAX_INST_SIZE) {
5837 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5838 (int)inst_size);
5839 rc = -EINVAL;
5840 goto err_release;
5841 }
5842
5843 if (data_size > IWL_MAX_DATA_SIZE) {
5844 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5845 (int)data_size);
5846 rc = -EINVAL;
5847 goto err_release;
5848 }
5849 if (init_size > IWL_MAX_INST_SIZE) {
5850 IWL_DEBUG_INFO
5851 ("uCode init instr len %d too large to fit in card\n",
5852 (int)init_size);
5853 rc = -EINVAL;
5854 goto err_release;
5855 }
5856 if (init_data_size > IWL_MAX_DATA_SIZE) {
5857 IWL_DEBUG_INFO
5858 ("uCode init data len %d too large to fit in card\n",
5859 (int)init_data_size);
5860 rc = -EINVAL;
5861 goto err_release;
5862 }
5863 if (boot_size > IWL_MAX_BSM_SIZE) {
5864 IWL_DEBUG_INFO
5865 ("uCode boot instr len %d too large to fit in bsm\n",
5866 (int)boot_size);
5867 rc = -EINVAL;
5868 goto err_release;
5869 }
5870
5871 /* Allocate ucode buffers for card's bus-master loading ... */
5872
5873 /* Runtime instructions and 2 copies of data:
5874 * 1) unmodified from disk
5875 * 2) backup cache for save/restore during power-downs */
5876 priv->ucode_code.len = inst_size;
5877 priv->ucode_code.v_addr =
5878 pci_alloc_consistent(priv->pci_dev,
5879 priv->ucode_code.len,
5880 &(priv->ucode_code.p_addr));
5881
5882 priv->ucode_data.len = data_size;
5883 priv->ucode_data.v_addr =
5884 pci_alloc_consistent(priv->pci_dev,
5885 priv->ucode_data.len,
5886 &(priv->ucode_data.p_addr));
5887
5888 priv->ucode_data_backup.len = data_size;
5889 priv->ucode_data_backup.v_addr =
5890 pci_alloc_consistent(priv->pci_dev,
5891 priv->ucode_data_backup.len,
5892 &(priv->ucode_data_backup.p_addr));
5893
5894
5895 /* Initialization instructions and data */
5896 priv->ucode_init.len = init_size;
5897 priv->ucode_init.v_addr =
5898 pci_alloc_consistent(priv->pci_dev,
5899 priv->ucode_init.len,
5900 &(priv->ucode_init.p_addr));
5901
5902 priv->ucode_init_data.len = init_data_size;
5903 priv->ucode_init_data.v_addr =
5904 pci_alloc_consistent(priv->pci_dev,
5905 priv->ucode_init_data.len,
5906 &(priv->ucode_init_data.p_addr));
5907
5908 /* Bootstrap (instructions only, no data) */
5909 priv->ucode_boot.len = boot_size;
5910 priv->ucode_boot.v_addr =
5911 pci_alloc_consistent(priv->pci_dev,
5912 priv->ucode_boot.len,
5913 &(priv->ucode_boot.p_addr));
5914
5915 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5916 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5917 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5918 goto err_pci_alloc;
5919
5920 /* Copy images into buffers for card's bus-master reads ... */
5921
5922 /* Runtime instructions (first block of data in file) */
5923 src = &ucode->data[0];
5924 len = priv->ucode_code.len;
5925 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5926 (int)len);
5927 memcpy(priv->ucode_code.v_addr, src, len);
5928 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5929 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5930
5931 /* Runtime data (2nd block)
5932 * NOTE: Copy into backup buffer will be done in iwl_up() */
5933 src = &ucode->data[inst_size];
5934 len = priv->ucode_data.len;
5935 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5936 (int)len);
5937 memcpy(priv->ucode_data.v_addr, src, len);
5938 memcpy(priv->ucode_data_backup.v_addr, src, len);
5939
5940 /* Initialization instructions (3rd block) */
5941 if (init_size) {
5942 src = &ucode->data[inst_size + data_size];
5943 len = priv->ucode_init.len;
5944 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5945 (int)len);
5946 memcpy(priv->ucode_init.v_addr, src, len);
5947 }
5948
5949 /* Initialization data (4th block) */
5950 if (init_data_size) {
5951 src = &ucode->data[inst_size + data_size + init_size];
5952 len = priv->ucode_init_data.len;
5953 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5954 (int)len);
5955 memcpy(priv->ucode_init_data.v_addr, src, len);
5956 }
5957
5958 /* Bootstrap instructions (5th block) */
5959 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5960 len = priv->ucode_boot.len;
5961 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5962 (int)len);
5963 memcpy(priv->ucode_boot.v_addr, src, len);
5964
5965 /* We have our copies now, allow OS release its copies */
5966 release_firmware(ucode_raw);
5967 return 0;
5968
5969 err_pci_alloc:
5970 IWL_ERROR("failed to allocate pci memory\n");
5971 rc = -ENOMEM;
5972 iwl_dealloc_ucode_pci(priv);
5973
5974 err_release:
5975 release_firmware(ucode_raw);
5976
5977 error:
5978 return rc;
5979 }
5980
5981
5982 /**
5983 * iwl_set_ucode_ptrs - Set uCode address location
5984 *
5985 * Tell initialization uCode where to find runtime uCode.
5986 *
5987 * BSM registers initially contain pointers to initialization uCode.
5988 * We need to replace them to load runtime uCode inst and data,
5989 * and to save runtime data when powering down.
5990 */
5991 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
5992 {
5993 dma_addr_t pinst;
5994 dma_addr_t pdata;
5995 int rc = 0;
5996 unsigned long flags;
5997
5998 /* bits 31:0 for 3945 */
5999 pinst = priv->ucode_code.p_addr;
6000 pdata = priv->ucode_data_backup.p_addr;
6001
6002 spin_lock_irqsave(&priv->lock, flags);
6003 rc = iwl_grab_restricted_access(priv);
6004 if (rc) {
6005 spin_unlock_irqrestore(&priv->lock, flags);
6006 return rc;
6007 }
6008
6009 /* Tell bootstrap uCode where to find image to load */
6010 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6011 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6012 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6013 priv->ucode_data.len);
6014
6015 /* Inst bytecount must be last to set up, bit 31 signals uCode
6016 * that all new ptr/size info is in place */
6017 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6018 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6019
6020 iwl_release_restricted_access(priv);
6021
6022 spin_unlock_irqrestore(&priv->lock, flags);
6023
6024 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6025
6026 return rc;
6027 }
6028
6029 /**
6030 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6031 *
6032 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6033 *
6034 * The 4965 "initialize" ALIVE reply contains calibration data for:
6035 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6036 * (3945 does not contain this data).
6037 *
6038 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6039 */
6040 static void iwl_init_alive_start(struct iwl_priv *priv)
6041 {
6042 /* Check alive response for "valid" sign from uCode */
6043 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6044 /* We had an error bringing up the hardware, so take it
6045 * all the way back down so we can try again */
6046 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6047 goto restart;
6048 }
6049
6050 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6051 * This is a paranoid check, because we would not have gotten the
6052 * "initialize" alive if code weren't properly loaded. */
6053 if (iwl_verify_ucode(priv)) {
6054 /* Runtime instruction load was bad;
6055 * take it all the way back down so we can try again */
6056 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6057 goto restart;
6058 }
6059
6060 /* Send pointers to protocol/runtime uCode image ... init code will
6061 * load and launch runtime uCode, which will send us another "Alive"
6062 * notification. */
6063 IWL_DEBUG_INFO("Initialization Alive received.\n");
6064 if (iwl_set_ucode_ptrs(priv)) {
6065 /* Runtime instruction load won't happen;
6066 * take it all the way back down so we can try again */
6067 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6068 goto restart;
6069 }
6070 return;
6071
6072 restart:
6073 queue_work(priv->workqueue, &priv->restart);
6074 }
6075
6076
6077 /**
6078 * iwl_alive_start - called after REPLY_ALIVE notification received
6079 * from protocol/runtime uCode (initialization uCode's
6080 * Alive gets handled by iwl_init_alive_start()).
6081 */
6082 static void iwl_alive_start(struct iwl_priv *priv)
6083 {
6084 int rc = 0;
6085 int thermal_spin = 0;
6086 u32 rfkill;
6087
6088 IWL_DEBUG_INFO("Runtime Alive received.\n");
6089
6090 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6091 /* We had an error bringing up the hardware, so take it
6092 * all the way back down so we can try again */
6093 IWL_DEBUG_INFO("Alive failed.\n");
6094 goto restart;
6095 }
6096
6097 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6098 * This is a paranoid check, because we would not have gotten the
6099 * "runtime" alive if code weren't properly loaded. */
6100 if (iwl_verify_ucode(priv)) {
6101 /* Runtime instruction load was bad;
6102 * take it all the way back down so we can try again */
6103 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6104 goto restart;
6105 }
6106
6107 iwl_clear_stations_table(priv);
6108
6109 rc = iwl_grab_restricted_access(priv);
6110 if (rc) {
6111 IWL_WARNING("Can not read rfkill status from adapter\n");
6112 return;
6113 }
6114
6115 rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6116 IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6117 iwl_release_restricted_access(priv);
6118
6119 if (rfkill & 0x1) {
6120 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6121 /* if rfkill is not on, then wait for thermal
6122 * sensor in adapter to kick in */
6123 while (iwl_hw_get_temperature(priv) == 0) {
6124 thermal_spin++;
6125 udelay(10);
6126 }
6127
6128 if (thermal_spin)
6129 IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6130 thermal_spin * 10);
6131 } else
6132 set_bit(STATUS_RF_KILL_HW, &priv->status);
6133
6134 /* After the ALIVE response, we can process host commands */
6135 set_bit(STATUS_ALIVE, &priv->status);
6136
6137 /* Clear out the uCode error bit if it is set */
6138 clear_bit(STATUS_FW_ERROR, &priv->status);
6139
6140 rc = iwl_init_channel_map(priv);
6141 if (rc) {
6142 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6143 return;
6144 }
6145
6146 iwl_init_geos(priv);
6147
6148 if (iwl_is_rfkill(priv))
6149 return;
6150
6151 if (!priv->mac80211_registered) {
6152 /* Unlock so any user space entry points can call back into
6153 * the driver without a deadlock... */
6154 mutex_unlock(&priv->mutex);
6155 iwl_rate_control_register(priv->hw);
6156 rc = ieee80211_register_hw(priv->hw);
6157 priv->hw->conf.beacon_int = 100;
6158 mutex_lock(&priv->mutex);
6159
6160 if (rc) {
6161 IWL_ERROR("Failed to register network "
6162 "device (error %d)\n", rc);
6163 return;
6164 }
6165
6166 priv->mac80211_registered = 1;
6167
6168 iwl_reset_channel_flag(priv);
6169 } else
6170 ieee80211_start_queues(priv->hw);
6171
6172 priv->active_rate = priv->rates_mask;
6173 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6174
6175 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6176
6177 if (iwl_is_associated(priv)) {
6178 struct iwl_rxon_cmd *active_rxon =
6179 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6180
6181 memcpy(&priv->staging_rxon, &priv->active_rxon,
6182 sizeof(priv->staging_rxon));
6183 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6184 } else {
6185 /* Initialize our rx_config data */
6186 iwl_connection_init_rx_config(priv);
6187 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6188 }
6189
6190 /* Configure BT coexistence */
6191 iwl_send_bt_config(priv);
6192
6193 /* Configure the adapter for unassociated operation */
6194 iwl_commit_rxon(priv);
6195
6196 /* At this point, the NIC is initialized and operational */
6197 priv->notif_missed_beacons = 0;
6198 set_bit(STATUS_READY, &priv->status);
6199
6200 iwl3945_reg_txpower_periodic(priv);
6201
6202 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6203
6204 if (priv->error_recovering)
6205 iwl_error_recovery(priv);
6206
6207 return;
6208
6209 restart:
6210 queue_work(priv->workqueue, &priv->restart);
6211 }
6212
6213 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6214
6215 static void __iwl_down(struct iwl_priv *priv)
6216 {
6217 unsigned long flags;
6218 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6219 struct ieee80211_conf *conf = NULL;
6220
6221 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6222
6223 conf = ieee80211_get_hw_conf(priv->hw);
6224
6225 if (!exit_pending)
6226 set_bit(STATUS_EXIT_PENDING, &priv->status);
6227
6228 iwl_clear_stations_table(priv);
6229
6230 /* Unblock any waiting calls */
6231 wake_up_interruptible_all(&priv->wait_command_queue);
6232
6233 iwl_cancel_deferred_work(priv);
6234
6235 /* Wipe out the EXIT_PENDING status bit if we are not actually
6236 * exiting the module */
6237 if (!exit_pending)
6238 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6239
6240 /* stop and reset the on-board processor */
6241 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6242
6243 /* tell the device to stop sending interrupts */
6244 iwl_disable_interrupts(priv);
6245
6246 if (priv->mac80211_registered)
6247 ieee80211_stop_queues(priv->hw);
6248
6249 /* If we have not previously called iwl_init() then
6250 * clear all bits but the RF Kill and SUSPEND bits and return */
6251 if (!iwl_is_init(priv)) {
6252 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6253 STATUS_RF_KILL_HW |
6254 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6255 STATUS_RF_KILL_SW |
6256 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6257 STATUS_IN_SUSPEND;
6258 goto exit;
6259 }
6260
6261 /* ...otherwise clear out all the status bits but the RF Kill and
6262 * SUSPEND bits and continue taking the NIC down. */
6263 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6264 STATUS_RF_KILL_HW |
6265 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6266 STATUS_RF_KILL_SW |
6267 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6268 STATUS_IN_SUSPEND |
6269 test_bit(STATUS_FW_ERROR, &priv->status) <<
6270 STATUS_FW_ERROR;
6271
6272 spin_lock_irqsave(&priv->lock, flags);
6273 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6274 spin_unlock_irqrestore(&priv->lock, flags);
6275
6276 iwl_hw_txq_ctx_stop(priv);
6277 iwl_hw_rxq_stop(priv);
6278
6279 spin_lock_irqsave(&priv->lock, flags);
6280 if (!iwl_grab_restricted_access(priv)) {
6281 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6282 APMG_CLK_VAL_DMA_CLK_RQT);
6283 iwl_release_restricted_access(priv);
6284 }
6285 spin_unlock_irqrestore(&priv->lock, flags);
6286
6287 udelay(5);
6288
6289 iwl_hw_nic_stop_master(priv);
6290 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6291 iwl_hw_nic_reset(priv);
6292
6293 exit:
6294 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6295
6296 if (priv->ibss_beacon)
6297 dev_kfree_skb(priv->ibss_beacon);
6298 priv->ibss_beacon = NULL;
6299
6300 /* clear out any free frames */
6301 iwl_clear_free_frames(priv);
6302 }
6303
6304 static void iwl_down(struct iwl_priv *priv)
6305 {
6306 mutex_lock(&priv->mutex);
6307 __iwl_down(priv);
6308 mutex_unlock(&priv->mutex);
6309 }
6310
6311 #define MAX_HW_RESTARTS 5
6312
6313 static int __iwl_up(struct iwl_priv *priv)
6314 {
6315 DECLARE_MAC_BUF(mac);
6316 int rc, i;
6317
6318 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6319 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6320 return -EIO;
6321 }
6322
6323 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6324 IWL_WARNING("Radio disabled by SW RF kill (module "
6325 "parameter)\n");
6326 return 0;
6327 }
6328
6329 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6330
6331 rc = iwl_hw_nic_init(priv);
6332 if (rc) {
6333 IWL_ERROR("Unable to int nic\n");
6334 return rc;
6335 }
6336
6337 /* make sure rfkill handshake bits are cleared */
6338 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6339 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6340 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6341
6342 /* clear (again), then enable host interrupts */
6343 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6344 iwl_enable_interrupts(priv);
6345
6346 /* really make sure rfkill handshake bits are cleared */
6347 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6348 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6349
6350 /* Copy original ucode data image from disk into backup cache.
6351 * This will be used to initialize the on-board processor's
6352 * data SRAM for a clean start when the runtime program first loads. */
6353 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6354 priv->ucode_data.len);
6355
6356 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6357
6358 iwl_clear_stations_table(priv);
6359
6360 /* load bootstrap state machine,
6361 * load bootstrap program into processor's memory,
6362 * prepare to load the "initialize" uCode */
6363 rc = iwl_load_bsm(priv);
6364
6365 if (rc) {
6366 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6367 continue;
6368 }
6369
6370 /* start card; "initialize" will load runtime ucode */
6371 iwl_nic_start(priv);
6372
6373 /* MAC Address location in EEPROM same for 3945/4965 */
6374 get_eeprom_mac(priv, priv->mac_addr);
6375 IWL_DEBUG_INFO("MAC address: %s\n",
6376 print_mac(mac, priv->mac_addr));
6377
6378 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6379
6380 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6381
6382 return 0;
6383 }
6384
6385 set_bit(STATUS_EXIT_PENDING, &priv->status);
6386 __iwl_down(priv);
6387
6388 /* tried to restart and config the device for as long as our
6389 * patience could withstand */
6390 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6391 return -EIO;
6392 }
6393
6394
6395 /*****************************************************************************
6396 *
6397 * Workqueue callbacks
6398 *
6399 *****************************************************************************/
6400
6401 static void iwl_bg_init_alive_start(struct work_struct *data)
6402 {
6403 struct iwl_priv *priv =
6404 container_of(data, struct iwl_priv, init_alive_start.work);
6405
6406 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6407 return;
6408
6409 mutex_lock(&priv->mutex);
6410 iwl_init_alive_start(priv);
6411 mutex_unlock(&priv->mutex);
6412 }
6413
6414 static void iwl_bg_alive_start(struct work_struct *data)
6415 {
6416 struct iwl_priv *priv =
6417 container_of(data, struct iwl_priv, alive_start.work);
6418
6419 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6420 return;
6421
6422 mutex_lock(&priv->mutex);
6423 iwl_alive_start(priv);
6424 mutex_unlock(&priv->mutex);
6425 }
6426
6427 static void iwl_bg_rf_kill(struct work_struct *work)
6428 {
6429 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6430
6431 wake_up_interruptible(&priv->wait_command_queue);
6432
6433 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6434 return;
6435
6436 mutex_lock(&priv->mutex);
6437
6438 if (!iwl_is_rfkill(priv)) {
6439 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6440 "HW and/or SW RF Kill no longer active, restarting "
6441 "device\n");
6442 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6443 queue_work(priv->workqueue, &priv->restart);
6444 } else {
6445
6446 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6447 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6448 "disabled by SW switch\n");
6449 else
6450 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6451 "Kill switch must be turned off for "
6452 "wireless networking to work.\n");
6453 }
6454 mutex_unlock(&priv->mutex);
6455 }
6456
6457 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6458
6459 static void iwl_bg_scan_check(struct work_struct *data)
6460 {
6461 struct iwl_priv *priv =
6462 container_of(data, struct iwl_priv, scan_check.work);
6463
6464 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6465 return;
6466
6467 mutex_lock(&priv->mutex);
6468 if (test_bit(STATUS_SCANNING, &priv->status) ||
6469 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6470 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6471 "Scan completion watchdog resetting adapter (%dms)\n",
6472 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6473 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6474 queue_work(priv->workqueue, &priv->restart);
6475 }
6476 mutex_unlock(&priv->mutex);
6477 }
6478
6479 static void iwl_bg_request_scan(struct work_struct *data)
6480 {
6481 struct iwl_priv *priv =
6482 container_of(data, struct iwl_priv, request_scan);
6483 struct iwl_host_cmd cmd = {
6484 .id = REPLY_SCAN_CMD,
6485 .len = sizeof(struct iwl_scan_cmd),
6486 .meta.flags = CMD_SIZE_HUGE,
6487 };
6488 int rc = 0;
6489 struct iwl_scan_cmd *scan;
6490 struct ieee80211_conf *conf = NULL;
6491 u8 direct_mask;
6492 int phymode;
6493
6494 conf = ieee80211_get_hw_conf(priv->hw);
6495
6496 mutex_lock(&priv->mutex);
6497
6498 if (!iwl_is_ready(priv)) {
6499 IWL_WARNING("request scan called when driver not ready.\n");
6500 goto done;
6501 }
6502
6503 /* Make sure the scan wasn't cancelled before this queued work
6504 * was given the chance to run... */
6505 if (!test_bit(STATUS_SCANNING, &priv->status))
6506 goto done;
6507
6508 /* This should never be called or scheduled if there is currently
6509 * a scan active in the hardware. */
6510 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6511 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6512 "Ignoring second request.\n");
6513 rc = -EIO;
6514 goto done;
6515 }
6516
6517 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6518 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6519 goto done;
6520 }
6521
6522 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6523 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6524 goto done;
6525 }
6526
6527 if (iwl_is_rfkill(priv)) {
6528 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6529 goto done;
6530 }
6531
6532 if (!test_bit(STATUS_READY, &priv->status)) {
6533 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6534 goto done;
6535 }
6536
6537 if (!priv->scan_bands) {
6538 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6539 goto done;
6540 }
6541
6542 if (!priv->scan) {
6543 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6544 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6545 if (!priv->scan) {
6546 rc = -ENOMEM;
6547 goto done;
6548 }
6549 }
6550 scan = priv->scan;
6551 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6552
6553 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6554 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6555
6556 if (iwl_is_associated(priv)) {
6557 u16 interval = 0;
6558 u32 extra;
6559 u32 suspend_time = 100;
6560 u32 scan_suspend_time = 100;
6561 unsigned long flags;
6562
6563 IWL_DEBUG_INFO("Scanning while associated...\n");
6564
6565 spin_lock_irqsave(&priv->lock, flags);
6566 interval = priv->beacon_int;
6567 spin_unlock_irqrestore(&priv->lock, flags);
6568
6569 scan->suspend_time = 0;
6570 scan->max_out_time = cpu_to_le32(600 * 1024);
6571 if (!interval)
6572 interval = suspend_time;
6573 /*
6574 * suspend time format:
6575 * 0-19: beacon interval in usec (time before exec.)
6576 * 20-23: 0
6577 * 24-31: number of beacons (suspend between channels)
6578 */
6579
6580 extra = (suspend_time / interval) << 24;
6581 scan_suspend_time = 0xFF0FFFFF &
6582 (extra | ((suspend_time % interval) * 1024));
6583
6584 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6585 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6586 scan_suspend_time, interval);
6587 }
6588
6589 /* We should add the ability for user to lock to PASSIVE ONLY */
6590 if (priv->one_direct_scan) {
6591 IWL_DEBUG_SCAN
6592 ("Kicking off one direct scan for '%s'\n",
6593 iwl_escape_essid(priv->direct_ssid,
6594 priv->direct_ssid_len));
6595 scan->direct_scan[0].id = WLAN_EID_SSID;
6596 scan->direct_scan[0].len = priv->direct_ssid_len;
6597 memcpy(scan->direct_scan[0].ssid,
6598 priv->direct_ssid, priv->direct_ssid_len);
6599 direct_mask = 1;
6600 } else if (!iwl_is_associated(priv)) {
6601 scan->direct_scan[0].id = WLAN_EID_SSID;
6602 scan->direct_scan[0].len = priv->essid_len;
6603 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6604 direct_mask = 1;
6605 } else
6606 direct_mask = 0;
6607
6608 /* We don't build a direct scan probe request; the uCode will do
6609 * that based on the direct_mask added to each channel entry */
6610 scan->tx_cmd.len = cpu_to_le16(
6611 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6612 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6613 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6614 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6615 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6616
6617 /* flags + rate selection */
6618
6619 switch (priv->scan_bands) {
6620 case 2:
6621 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6622 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6623 scan->good_CRC_th = 0;
6624 phymode = MODE_IEEE80211G;
6625 break;
6626
6627 case 1:
6628 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6629 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6630 phymode = MODE_IEEE80211A;
6631 break;
6632
6633 default:
6634 IWL_WARNING("Invalid scan band count\n");
6635 goto done;
6636 }
6637
6638 /* select Rx antennas */
6639 scan->flags |= iwl3945_get_antenna_flags(priv);
6640
6641 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6642 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6643
6644 if (direct_mask)
6645 IWL_DEBUG_SCAN
6646 ("Initiating direct scan for %s.\n",
6647 iwl_escape_essid(priv->essid, priv->essid_len));
6648 else
6649 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6650
6651 scan->channel_count =
6652 iwl_get_channels_for_scan(
6653 priv, phymode, 1, /* active */
6654 direct_mask,
6655 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6656
6657 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6658 scan->channel_count * sizeof(struct iwl_scan_channel);
6659 cmd.data = scan;
6660 scan->len = cpu_to_le16(cmd.len);
6661
6662 set_bit(STATUS_SCAN_HW, &priv->status);
6663 rc = iwl_send_cmd_sync(priv, &cmd);
6664 if (rc)
6665 goto done;
6666
6667 queue_delayed_work(priv->workqueue, &priv->scan_check,
6668 IWL_SCAN_CHECK_WATCHDOG);
6669
6670 mutex_unlock(&priv->mutex);
6671 return;
6672
6673 done:
6674 /* inform mac80211 sacn aborted */
6675 queue_work(priv->workqueue, &priv->scan_completed);
6676 mutex_unlock(&priv->mutex);
6677 }
6678
6679 static void iwl_bg_up(struct work_struct *data)
6680 {
6681 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6682
6683 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6684 return;
6685
6686 mutex_lock(&priv->mutex);
6687 __iwl_up(priv);
6688 mutex_unlock(&priv->mutex);
6689 }
6690
6691 static void iwl_bg_restart(struct work_struct *data)
6692 {
6693 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6694
6695 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6696 return;
6697
6698 iwl_down(priv);
6699 queue_work(priv->workqueue, &priv->up);
6700 }
6701
6702 static void iwl_bg_rx_replenish(struct work_struct *data)
6703 {
6704 struct iwl_priv *priv =
6705 container_of(data, struct iwl_priv, rx_replenish);
6706
6707 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6708 return;
6709
6710 mutex_lock(&priv->mutex);
6711 iwl_rx_replenish(priv);
6712 mutex_unlock(&priv->mutex);
6713 }
6714
6715 static void iwl_bg_post_associate(struct work_struct *data)
6716 {
6717 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6718 post_associate.work);
6719
6720 int rc = 0;
6721 struct ieee80211_conf *conf = NULL;
6722 DECLARE_MAC_BUF(mac);
6723
6724 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6725 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6726 return;
6727 }
6728
6729
6730 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6731 priv->assoc_id,
6732 print_mac(mac, priv->active_rxon.bssid_addr));
6733
6734 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6735 return;
6736
6737 mutex_lock(&priv->mutex);
6738
6739 conf = ieee80211_get_hw_conf(priv->hw);
6740
6741 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6742 iwl_commit_rxon(priv);
6743
6744 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6745 iwl_setup_rxon_timing(priv);
6746 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6747 sizeof(priv->rxon_timing), &priv->rxon_timing);
6748 if (rc)
6749 IWL_WARNING("REPLY_RXON_TIMING failed - "
6750 "Attempting to continue.\n");
6751
6752 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6753
6754 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6755
6756 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6757 priv->assoc_id, priv->beacon_int);
6758
6759 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6760 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6761 else
6762 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6763
6764 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6765 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6766 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6767 else
6768 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6769
6770 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6771 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6772
6773 }
6774
6775 iwl_commit_rxon(priv);
6776
6777 switch (priv->iw_mode) {
6778 case IEEE80211_IF_TYPE_STA:
6779 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6780 break;
6781
6782 case IEEE80211_IF_TYPE_IBSS:
6783
6784 /* clear out the station table */
6785 iwl_clear_stations_table(priv);
6786
6787 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6788 iwl_add_station(priv, priv->bssid, 0, 0);
6789 iwl3945_sync_sta(priv, IWL_STA_ID,
6790 (priv->phymode == MODE_IEEE80211A)?
6791 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6792 CMD_ASYNC);
6793 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6794 iwl_send_beacon_cmd(priv);
6795
6796 break;
6797
6798 default:
6799 IWL_ERROR("%s Should not be called in %d mode\n",
6800 __FUNCTION__, priv->iw_mode);
6801 break;
6802 }
6803
6804 iwl_sequence_reset(priv);
6805
6806 #ifdef CONFIG_IWLWIFI_QOS
6807 iwl_activate_qos(priv, 0);
6808 #endif /* CONFIG_IWLWIFI_QOS */
6809 mutex_unlock(&priv->mutex);
6810 }
6811
6812 static void iwl_bg_abort_scan(struct work_struct *work)
6813 {
6814 struct iwl_priv *priv = container_of(work, struct iwl_priv,
6815 abort_scan);
6816
6817 if (!iwl_is_ready(priv))
6818 return;
6819
6820 mutex_lock(&priv->mutex);
6821
6822 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6823 iwl_send_scan_abort(priv);
6824
6825 mutex_unlock(&priv->mutex);
6826 }
6827
6828 static void iwl_bg_scan_completed(struct work_struct *work)
6829 {
6830 struct iwl_priv *priv =
6831 container_of(work, struct iwl_priv, scan_completed);
6832
6833 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6834
6835 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6836 return;
6837
6838 ieee80211_scan_completed(priv->hw);
6839
6840 /* Since setting the TXPOWER may have been deferred while
6841 * performing the scan, fire one off */
6842 mutex_lock(&priv->mutex);
6843 iwl_hw_reg_send_txpower(priv);
6844 mutex_unlock(&priv->mutex);
6845 }
6846
6847 /*****************************************************************************
6848 *
6849 * mac80211 entry point functions
6850 *
6851 *****************************************************************************/
6852
6853 static int iwl_mac_start(struct ieee80211_hw *hw)
6854 {
6855 struct iwl_priv *priv = hw->priv;
6856
6857 IWL_DEBUG_MAC80211("enter\n");
6858
6859 /* we should be verifying the device is ready to be opened */
6860 mutex_lock(&priv->mutex);
6861
6862 priv->is_open = 1;
6863
6864 if (!iwl_is_rfkill(priv))
6865 ieee80211_start_queues(priv->hw);
6866
6867 mutex_unlock(&priv->mutex);
6868 IWL_DEBUG_MAC80211("leave\n");
6869 return 0;
6870 }
6871
6872 static void iwl_mac_stop(struct ieee80211_hw *hw)
6873 {
6874 struct iwl_priv *priv = hw->priv;
6875
6876 IWL_DEBUG_MAC80211("enter\n");
6877 priv->is_open = 0;
6878 /*netif_stop_queue(dev); */
6879 flush_workqueue(priv->workqueue);
6880 IWL_DEBUG_MAC80211("leave\n");
6881 }
6882
6883 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6884 struct ieee80211_tx_control *ctl)
6885 {
6886 struct iwl_priv *priv = hw->priv;
6887
6888 IWL_DEBUG_MAC80211("enter\n");
6889
6890 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6891 IWL_DEBUG_MAC80211("leave - monitor\n");
6892 return -1;
6893 }
6894
6895 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6896 ctl->tx_rate);
6897
6898 if (iwl_tx_skb(priv, skb, ctl))
6899 dev_kfree_skb_any(skb);
6900
6901 IWL_DEBUG_MAC80211("leave\n");
6902 return 0;
6903 }
6904
6905 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6906 struct ieee80211_if_init_conf *conf)
6907 {
6908 struct iwl_priv *priv = hw->priv;
6909 unsigned long flags;
6910 DECLARE_MAC_BUF(mac);
6911
6912 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6913 if (conf->mac_addr)
6914 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6915 print_mac(mac, conf->mac_addr));
6916
6917 if (priv->interface_id) {
6918 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6919 return 0;
6920 }
6921
6922 spin_lock_irqsave(&priv->lock, flags);
6923 priv->interface_id = conf->if_id;
6924
6925 spin_unlock_irqrestore(&priv->lock, flags);
6926
6927 mutex_lock(&priv->mutex);
6928 iwl_set_mode(priv, conf->type);
6929
6930 IWL_DEBUG_MAC80211("leave\n");
6931 mutex_unlock(&priv->mutex);
6932
6933 return 0;
6934 }
6935
6936 /**
6937 * iwl_mac_config - mac80211 config callback
6938 *
6939 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6940 * be set inappropriately and the driver currently sets the hardware up to
6941 * use it whenever needed.
6942 */
6943 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6944 {
6945 struct iwl_priv *priv = hw->priv;
6946 const struct iwl_channel_info *ch_info;
6947 unsigned long flags;
6948
6949 mutex_lock(&priv->mutex);
6950 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6951
6952 if (!iwl_is_ready(priv)) {
6953 IWL_DEBUG_MAC80211("leave - not ready\n");
6954 mutex_unlock(&priv->mutex);
6955 return -EIO;
6956 }
6957
6958 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6959 * what is exposed through include/ declrations */
6960 if (unlikely(!iwl_param_disable_hw_scan &&
6961 test_bit(STATUS_SCANNING, &priv->status))) {
6962 IWL_DEBUG_MAC80211("leave - scanning\n");
6963 mutex_unlock(&priv->mutex);
6964 return 0;
6965 }
6966
6967 spin_lock_irqsave(&priv->lock, flags);
6968
6969 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6970 if (!is_channel_valid(ch_info)) {
6971 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6972 conf->channel, conf->phymode);
6973 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6974 spin_unlock_irqrestore(&priv->lock, flags);
6975 mutex_unlock(&priv->mutex);
6976 return -EINVAL;
6977 }
6978
6979 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6980
6981 iwl_set_flags_for_phymode(priv, conf->phymode);
6982
6983 /* The list of supported rates and rate mask can be different
6984 * for each phymode; since the phymode may have changed, reset
6985 * the rate mask to what mac80211 lists */
6986 iwl_set_rate(priv);
6987
6988 spin_unlock_irqrestore(&priv->lock, flags);
6989
6990 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6991 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6992 iwl_hw_channel_switch(priv, conf->channel);
6993 mutex_unlock(&priv->mutex);
6994 return 0;
6995 }
6996 #endif
6997
6998 iwl_radio_kill_sw(priv, !conf->radio_enabled);
6999
7000 if (!conf->radio_enabled) {
7001 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7002 mutex_unlock(&priv->mutex);
7003 return 0;
7004 }
7005
7006 if (iwl_is_rfkill(priv)) {
7007 IWL_DEBUG_MAC80211("leave - RF kill\n");
7008 mutex_unlock(&priv->mutex);
7009 return -EIO;
7010 }
7011
7012 iwl_set_rate(priv);
7013
7014 if (memcmp(&priv->active_rxon,
7015 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7016 iwl_commit_rxon(priv);
7017 else
7018 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7019
7020 IWL_DEBUG_MAC80211("leave\n");
7021
7022 mutex_unlock(&priv->mutex);
7023
7024 return 0;
7025 }
7026
7027 static void iwl_config_ap(struct iwl_priv *priv)
7028 {
7029 int rc = 0;
7030
7031 if (priv->status & STATUS_EXIT_PENDING)
7032 return;
7033
7034 /* The following should be done only at AP bring up */
7035 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7036
7037 /* RXON - unassoc (to set timing command) */
7038 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7039 iwl_commit_rxon(priv);
7040
7041 /* RXON Timing */
7042 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7043 iwl_setup_rxon_timing(priv);
7044 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7045 sizeof(priv->rxon_timing), &priv->rxon_timing);
7046 if (rc)
7047 IWL_WARNING("REPLY_RXON_TIMING failed - "
7048 "Attempting to continue.\n");
7049
7050 /* FIXME: what should be the assoc_id for AP? */
7051 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7052 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7053 priv->staging_rxon.flags |=
7054 RXON_FLG_SHORT_PREAMBLE_MSK;
7055 else
7056 priv->staging_rxon.flags &=
7057 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7058
7059 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7060 if (priv->assoc_capability &
7061 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7062 priv->staging_rxon.flags |=
7063 RXON_FLG_SHORT_SLOT_MSK;
7064 else
7065 priv->staging_rxon.flags &=
7066 ~RXON_FLG_SHORT_SLOT_MSK;
7067
7068 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7069 priv->staging_rxon.flags &=
7070 ~RXON_FLG_SHORT_SLOT_MSK;
7071 }
7072 /* restore RXON assoc */
7073 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7074 iwl_commit_rxon(priv);
7075 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7076 }
7077 iwl_send_beacon_cmd(priv);
7078
7079 /* FIXME - we need to add code here to detect a totally new
7080 * configuration, reset the AP, unassoc, rxon timing, assoc,
7081 * clear sta table, add BCAST sta... */
7082 }
7083
7084 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7085 struct ieee80211_if_conf *conf)
7086 {
7087 struct iwl_priv *priv = hw->priv;
7088 DECLARE_MAC_BUF(mac);
7089 unsigned long flags;
7090 int rc;
7091
7092 if (conf == NULL)
7093 return -EIO;
7094
7095 /* XXX: this MUST use conf->mac_addr */
7096
7097 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7098 (!conf->beacon || !conf->ssid_len)) {
7099 IWL_DEBUG_MAC80211
7100 ("Leaving in AP mode because HostAPD is not ready.\n");
7101 return 0;
7102 }
7103
7104 mutex_lock(&priv->mutex);
7105
7106 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7107 if (conf->bssid)
7108 IWL_DEBUG_MAC80211("bssid: %s\n",
7109 print_mac(mac, conf->bssid));
7110
7111 /*
7112 * very dubious code was here; the probe filtering flag is never set:
7113 *
7114 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7115 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7116 */
7117 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7118 IWL_DEBUG_MAC80211("leave - scanning\n");
7119 mutex_unlock(&priv->mutex);
7120 return 0;
7121 }
7122
7123 if (priv->interface_id != if_id) {
7124 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7125 mutex_unlock(&priv->mutex);
7126 return 0;
7127 }
7128
7129 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7130 if (!conf->bssid) {
7131 conf->bssid = priv->mac_addr;
7132 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7133 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7134 print_mac(mac, conf->bssid));
7135 }
7136 if (priv->ibss_beacon)
7137 dev_kfree_skb(priv->ibss_beacon);
7138
7139 priv->ibss_beacon = conf->beacon;
7140 }
7141
7142 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7143 !is_multicast_ether_addr(conf->bssid)) {
7144 /* If there is currently a HW scan going on in the background
7145 * then we need to cancel it else the RXON below will fail. */
7146 if (iwl_scan_cancel_timeout(priv, 100)) {
7147 IWL_WARNING("Aborted scan still in progress "
7148 "after 100ms\n");
7149 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7150 mutex_unlock(&priv->mutex);
7151 return -EAGAIN;
7152 }
7153 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7154
7155 /* TODO: Audit driver for usage of these members and see
7156 * if mac80211 deprecates them (priv->bssid looks like it
7157 * shouldn't be there, but I haven't scanned the IBSS code
7158 * to verify) - jpk */
7159 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7160
7161 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7162 iwl_config_ap(priv);
7163 else {
7164 priv->staging_rxon.filter_flags |=
7165 RXON_FILTER_ASSOC_MSK;
7166 rc = iwl_commit_rxon(priv);
7167 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7168 iwl_add_station(priv,
7169 priv->active_rxon.bssid_addr, 1, 0);
7170 }
7171
7172 } else {
7173 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7174 iwl_commit_rxon(priv);
7175 }
7176
7177 spin_lock_irqsave(&priv->lock, flags);
7178 if (!conf->ssid_len)
7179 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7180 else
7181 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7182
7183 priv->essid_len = conf->ssid_len;
7184 spin_unlock_irqrestore(&priv->lock, flags);
7185
7186 IWL_DEBUG_MAC80211("leave\n");
7187 mutex_unlock(&priv->mutex);
7188
7189 return 0;
7190 }
7191
7192 static void iwl_configure_filter(struct ieee80211_hw *hw,
7193 unsigned int changed_flags,
7194 unsigned int *total_flags,
7195 int mc_count, struct dev_addr_list *mc_list)
7196 {
7197 /*
7198 * XXX: dummy
7199 * see also iwl_connection_init_rx_config
7200 */
7201 *total_flags = 0;
7202 }
7203
7204 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7205 struct ieee80211_if_init_conf *conf)
7206 {
7207 struct iwl_priv *priv = hw->priv;
7208
7209 IWL_DEBUG_MAC80211("enter\n");
7210
7211 mutex_lock(&priv->mutex);
7212 if (priv->interface_id == conf->if_id) {
7213 priv->interface_id = 0;
7214 memset(priv->bssid, 0, ETH_ALEN);
7215 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7216 priv->essid_len = 0;
7217 }
7218 mutex_unlock(&priv->mutex);
7219
7220 IWL_DEBUG_MAC80211("leave\n");
7221
7222 }
7223
7224 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7225 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7226 {
7227 int rc = 0;
7228 unsigned long flags;
7229 struct iwl_priv *priv = hw->priv;
7230
7231 IWL_DEBUG_MAC80211("enter\n");
7232
7233 spin_lock_irqsave(&priv->lock, flags);
7234
7235 if (!iwl_is_ready_rf(priv)) {
7236 rc = -EIO;
7237 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7238 goto out_unlock;
7239 }
7240
7241 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7242 rc = -EIO;
7243 IWL_ERROR("ERROR: APs don't scan\n");
7244 goto out_unlock;
7245 }
7246
7247 /* if we just finished scan ask for delay */
7248 if (priv->last_scan_jiffies &&
7249 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7250 jiffies)) {
7251 rc = -EAGAIN;
7252 goto out_unlock;
7253 }
7254 if (len) {
7255 IWL_DEBUG_SCAN("direct scan for "
7256 "%s [%d]\n ",
7257 iwl_escape_essid(ssid, len), (int)len);
7258
7259 priv->one_direct_scan = 1;
7260 priv->direct_ssid_len = (u8)
7261 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7262 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7263 }
7264
7265 rc = iwl_scan_initiate(priv);
7266
7267 IWL_DEBUG_MAC80211("leave\n");
7268
7269 out_unlock:
7270 spin_unlock_irqrestore(&priv->lock, flags);
7271
7272 return rc;
7273 }
7274
7275 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7276 const u8 *local_addr, const u8 *addr,
7277 struct ieee80211_key_conf *key)
7278 {
7279 struct iwl_priv *priv = hw->priv;
7280 int rc = 0;
7281 u8 sta_id;
7282
7283 IWL_DEBUG_MAC80211("enter\n");
7284
7285 if (!iwl_param_hwcrypto) {
7286 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7287 return -EOPNOTSUPP;
7288 }
7289
7290 if (is_zero_ether_addr(addr))
7291 /* only support pairwise keys */
7292 return -EOPNOTSUPP;
7293
7294 sta_id = iwl_hw_find_station(priv, addr);
7295 if (sta_id == IWL_INVALID_STATION) {
7296 DECLARE_MAC_BUF(mac);
7297
7298 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7299 print_mac(mac, addr));
7300 return -EINVAL;
7301 }
7302
7303 mutex_lock(&priv->mutex);
7304
7305 switch (cmd) {
7306 case SET_KEY:
7307 rc = iwl_update_sta_key_info(priv, key, sta_id);
7308 if (!rc) {
7309 iwl_set_rxon_hwcrypto(priv, 1);
7310 iwl_commit_rxon(priv);
7311 key->hw_key_idx = sta_id;
7312 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7313 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7314 }
7315 break;
7316 case DISABLE_KEY:
7317 rc = iwl_clear_sta_key_info(priv, sta_id);
7318 if (!rc) {
7319 iwl_set_rxon_hwcrypto(priv, 0);
7320 iwl_commit_rxon(priv);
7321 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7322 }
7323 break;
7324 default:
7325 rc = -EINVAL;
7326 }
7327
7328 IWL_DEBUG_MAC80211("leave\n");
7329 mutex_unlock(&priv->mutex);
7330
7331 return rc;
7332 }
7333
7334 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7335 const struct ieee80211_tx_queue_params *params)
7336 {
7337 struct iwl_priv *priv = hw->priv;
7338 #ifdef CONFIG_IWLWIFI_QOS
7339 unsigned long flags;
7340 int q;
7341 #endif /* CONFIG_IWL_QOS */
7342
7343 IWL_DEBUG_MAC80211("enter\n");
7344
7345 if (!iwl_is_ready_rf(priv)) {
7346 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7347 return -EIO;
7348 }
7349
7350 if (queue >= AC_NUM) {
7351 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7352 return 0;
7353 }
7354
7355 #ifdef CONFIG_IWLWIFI_QOS
7356 if (!priv->qos_data.qos_enable) {
7357 priv->qos_data.qos_active = 0;
7358 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7359 return 0;
7360 }
7361 q = AC_NUM - 1 - queue;
7362
7363 spin_lock_irqsave(&priv->lock, flags);
7364
7365 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7366 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7367 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7368 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7369 cpu_to_le16((params->burst_time * 100));
7370
7371 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7372 priv->qos_data.qos_active = 1;
7373
7374 spin_unlock_irqrestore(&priv->lock, flags);
7375
7376 mutex_lock(&priv->mutex);
7377 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7378 iwl_activate_qos(priv, 1);
7379 else if (priv->assoc_id && iwl_is_associated(priv))
7380 iwl_activate_qos(priv, 0);
7381
7382 mutex_unlock(&priv->mutex);
7383
7384 #endif /*CONFIG_IWLWIFI_QOS */
7385
7386 IWL_DEBUG_MAC80211("leave\n");
7387 return 0;
7388 }
7389
7390 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7391 struct ieee80211_tx_queue_stats *stats)
7392 {
7393 struct iwl_priv *priv = hw->priv;
7394 int i, avail;
7395 struct iwl_tx_queue *txq;
7396 struct iwl_queue *q;
7397 unsigned long flags;
7398
7399 IWL_DEBUG_MAC80211("enter\n");
7400
7401 if (!iwl_is_ready_rf(priv)) {
7402 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7403 return -EIO;
7404 }
7405
7406 spin_lock_irqsave(&priv->lock, flags);
7407
7408 for (i = 0; i < AC_NUM; i++) {
7409 txq = &priv->txq[i];
7410 q = &txq->q;
7411 avail = iwl_queue_space(q);
7412
7413 stats->data[i].len = q->n_window - avail;
7414 stats->data[i].limit = q->n_window - q->high_mark;
7415 stats->data[i].count = q->n_window;
7416
7417 }
7418 spin_unlock_irqrestore(&priv->lock, flags);
7419
7420 IWL_DEBUG_MAC80211("leave\n");
7421
7422 return 0;
7423 }
7424
7425 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7426 struct ieee80211_low_level_stats *stats)
7427 {
7428 IWL_DEBUG_MAC80211("enter\n");
7429 IWL_DEBUG_MAC80211("leave\n");
7430
7431 return 0;
7432 }
7433
7434 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7435 {
7436 IWL_DEBUG_MAC80211("enter\n");
7437 IWL_DEBUG_MAC80211("leave\n");
7438
7439 return 0;
7440 }
7441
7442 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7443 {
7444 struct iwl_priv *priv = hw->priv;
7445 unsigned long flags;
7446
7447 mutex_lock(&priv->mutex);
7448 IWL_DEBUG_MAC80211("enter\n");
7449
7450 #ifdef CONFIG_IWLWIFI_QOS
7451 iwl_reset_qos(priv);
7452 #endif
7453 cancel_delayed_work(&priv->post_associate);
7454
7455 spin_lock_irqsave(&priv->lock, flags);
7456 priv->assoc_id = 0;
7457 priv->assoc_capability = 0;
7458 priv->call_post_assoc_from_beacon = 0;
7459
7460 /* new association get rid of ibss beacon skb */
7461 if (priv->ibss_beacon)
7462 dev_kfree_skb(priv->ibss_beacon);
7463
7464 priv->ibss_beacon = NULL;
7465
7466 priv->beacon_int = priv->hw->conf.beacon_int;
7467 priv->timestamp1 = 0;
7468 priv->timestamp0 = 0;
7469 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7470 priv->beacon_int = 0;
7471
7472 spin_unlock_irqrestore(&priv->lock, flags);
7473
7474 /* Per mac80211.h: This is only used in IBSS mode... */
7475 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7476 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7477 mutex_unlock(&priv->mutex);
7478 return;
7479 }
7480
7481 if (!iwl_is_ready_rf(priv)) {
7482 IWL_DEBUG_MAC80211("leave - not ready\n");
7483 mutex_unlock(&priv->mutex);
7484 return;
7485 }
7486
7487 priv->only_active_channel = 0;
7488
7489 iwl_set_rate(priv);
7490
7491 mutex_unlock(&priv->mutex);
7492
7493 IWL_DEBUG_MAC80211("leave\n");
7494
7495 }
7496
7497 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7498 struct ieee80211_tx_control *control)
7499 {
7500 struct iwl_priv *priv = hw->priv;
7501 unsigned long flags;
7502
7503 mutex_lock(&priv->mutex);
7504 IWL_DEBUG_MAC80211("enter\n");
7505
7506 if (!iwl_is_ready_rf(priv)) {
7507 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7508 mutex_unlock(&priv->mutex);
7509 return -EIO;
7510 }
7511
7512 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7513 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7514 mutex_unlock(&priv->mutex);
7515 return -EIO;
7516 }
7517
7518 spin_lock_irqsave(&priv->lock, flags);
7519
7520 if (priv->ibss_beacon)
7521 dev_kfree_skb(priv->ibss_beacon);
7522
7523 priv->ibss_beacon = skb;
7524
7525 priv->assoc_id = 0;
7526
7527 IWL_DEBUG_MAC80211("leave\n");
7528 spin_unlock_irqrestore(&priv->lock, flags);
7529
7530 #ifdef CONFIG_IWLWIFI_QOS
7531 iwl_reset_qos(priv);
7532 #endif
7533
7534 queue_work(priv->workqueue, &priv->post_associate.work);
7535
7536 mutex_unlock(&priv->mutex);
7537
7538 return 0;
7539 }
7540
7541 /*****************************************************************************
7542 *
7543 * sysfs attributes
7544 *
7545 *****************************************************************************/
7546
7547 #ifdef CONFIG_IWLWIFI_DEBUG
7548
7549 /*
7550 * The following adds a new attribute to the sysfs representation
7551 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7552 * used for controlling the debug level.
7553 *
7554 * See the level definitions in iwl for details.
7555 */
7556
7557 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7558 {
7559 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7560 }
7561 static ssize_t store_debug_level(struct device_driver *d,
7562 const char *buf, size_t count)
7563 {
7564 char *p = (char *)buf;
7565 u32 val;
7566
7567 val = simple_strtoul(p, &p, 0);
7568 if (p == buf)
7569 printk(KERN_INFO DRV_NAME
7570 ": %s is not in hex or decimal form.\n", buf);
7571 else
7572 iwl_debug_level = val;
7573
7574 return strnlen(buf, count);
7575 }
7576
7577 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7578 show_debug_level, store_debug_level);
7579
7580 #endif /* CONFIG_IWLWIFI_DEBUG */
7581
7582 static ssize_t show_rf_kill(struct device *d,
7583 struct device_attribute *attr, char *buf)
7584 {
7585 /*
7586 * 0 - RF kill not enabled
7587 * 1 - SW based RF kill active (sysfs)
7588 * 2 - HW based RF kill active
7589 * 3 - Both HW and SW based RF kill active
7590 */
7591 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7592 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7593 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7594
7595 return sprintf(buf, "%i\n", val);
7596 }
7597
7598 static ssize_t store_rf_kill(struct device *d,
7599 struct device_attribute *attr,
7600 const char *buf, size_t count)
7601 {
7602 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7603
7604 mutex_lock(&priv->mutex);
7605 iwl_radio_kill_sw(priv, buf[0] == '1');
7606 mutex_unlock(&priv->mutex);
7607
7608 return count;
7609 }
7610
7611 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7612
7613 static ssize_t show_temperature(struct device *d,
7614 struct device_attribute *attr, char *buf)
7615 {
7616 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7617
7618 if (!iwl_is_alive(priv))
7619 return -EAGAIN;
7620
7621 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7622 }
7623
7624 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7625
7626 static ssize_t show_rs_window(struct device *d,
7627 struct device_attribute *attr,
7628 char *buf)
7629 {
7630 struct iwl_priv *priv = d->driver_data;
7631 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7632 }
7633 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7634
7635 static ssize_t show_tx_power(struct device *d,
7636 struct device_attribute *attr, char *buf)
7637 {
7638 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7639 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7640 }
7641
7642 static ssize_t store_tx_power(struct device *d,
7643 struct device_attribute *attr,
7644 const char *buf, size_t count)
7645 {
7646 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7647 char *p = (char *)buf;
7648 u32 val;
7649
7650 val = simple_strtoul(p, &p, 10);
7651 if (p == buf)
7652 printk(KERN_INFO DRV_NAME
7653 ": %s is not in decimal form.\n", buf);
7654 else
7655 iwl_hw_reg_set_txpower(priv, val);
7656
7657 return count;
7658 }
7659
7660 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7661
7662 static ssize_t show_flags(struct device *d,
7663 struct device_attribute *attr, char *buf)
7664 {
7665 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7666
7667 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7668 }
7669
7670 static ssize_t store_flags(struct device *d,
7671 struct device_attribute *attr,
7672 const char *buf, size_t count)
7673 {
7674 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7675 u32 flags = simple_strtoul(buf, NULL, 0);
7676
7677 mutex_lock(&priv->mutex);
7678 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7679 /* Cancel any currently running scans... */
7680 if (iwl_scan_cancel_timeout(priv, 100))
7681 IWL_WARNING("Could not cancel scan.\n");
7682 else {
7683 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7684 flags);
7685 priv->staging_rxon.flags = cpu_to_le32(flags);
7686 iwl_commit_rxon(priv);
7687 }
7688 }
7689 mutex_unlock(&priv->mutex);
7690
7691 return count;
7692 }
7693
7694 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7695
7696 static ssize_t show_filter_flags(struct device *d,
7697 struct device_attribute *attr, char *buf)
7698 {
7699 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7700
7701 return sprintf(buf, "0x%04X\n",
7702 le32_to_cpu(priv->active_rxon.filter_flags));
7703 }
7704
7705 static ssize_t store_filter_flags(struct device *d,
7706 struct device_attribute *attr,
7707 const char *buf, size_t count)
7708 {
7709 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7710 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7711
7712 mutex_lock(&priv->mutex);
7713 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7714 /* Cancel any currently running scans... */
7715 if (iwl_scan_cancel_timeout(priv, 100))
7716 IWL_WARNING("Could not cancel scan.\n");
7717 else {
7718 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7719 "0x%04X\n", filter_flags);
7720 priv->staging_rxon.filter_flags =
7721 cpu_to_le32(filter_flags);
7722 iwl_commit_rxon(priv);
7723 }
7724 }
7725 mutex_unlock(&priv->mutex);
7726
7727 return count;
7728 }
7729
7730 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7731 store_filter_flags);
7732
7733 static ssize_t show_tune(struct device *d,
7734 struct device_attribute *attr, char *buf)
7735 {
7736 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7737
7738 return sprintf(buf, "0x%04X\n",
7739 (priv->phymode << 8) |
7740 le16_to_cpu(priv->active_rxon.channel));
7741 }
7742
7743 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7744
7745 static ssize_t store_tune(struct device *d,
7746 struct device_attribute *attr,
7747 const char *buf, size_t count)
7748 {
7749 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7750 char *p = (char *)buf;
7751 u16 tune = simple_strtoul(p, &p, 0);
7752 u8 phymode = (tune >> 8) & 0xff;
7753 u16 channel = tune & 0xff;
7754
7755 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7756
7757 mutex_lock(&priv->mutex);
7758 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7759 (priv->phymode != phymode)) {
7760 const struct iwl_channel_info *ch_info;
7761
7762 ch_info = iwl_get_channel_info(priv, phymode, channel);
7763 if (!ch_info) {
7764 IWL_WARNING("Requested invalid phymode/channel "
7765 "combination: %d %d\n", phymode, channel);
7766 mutex_unlock(&priv->mutex);
7767 return -EINVAL;
7768 }
7769
7770 /* Cancel any currently running scans... */
7771 if (iwl_scan_cancel_timeout(priv, 100))
7772 IWL_WARNING("Could not cancel scan.\n");
7773 else {
7774 IWL_DEBUG_INFO("Committing phymode and "
7775 "rxon.channel = %d %d\n",
7776 phymode, channel);
7777
7778 iwl_set_rxon_channel(priv, phymode, channel);
7779 iwl_set_flags_for_phymode(priv, phymode);
7780
7781 iwl_set_rate(priv);
7782 iwl_commit_rxon(priv);
7783 }
7784 }
7785 mutex_unlock(&priv->mutex);
7786
7787 return count;
7788 }
7789
7790 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7791
7792 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7793
7794 static ssize_t show_measurement(struct device *d,
7795 struct device_attribute *attr, char *buf)
7796 {
7797 struct iwl_priv *priv = dev_get_drvdata(d);
7798 struct iwl_spectrum_notification measure_report;
7799 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7800 u8 *data = (u8 *) & measure_report;
7801 unsigned long flags;
7802
7803 spin_lock_irqsave(&priv->lock, flags);
7804 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7805 spin_unlock_irqrestore(&priv->lock, flags);
7806 return 0;
7807 }
7808 memcpy(&measure_report, &priv->measure_report, size);
7809 priv->measurement_status = 0;
7810 spin_unlock_irqrestore(&priv->lock, flags);
7811
7812 while (size && (PAGE_SIZE - len)) {
7813 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7814 PAGE_SIZE - len, 1);
7815 len = strlen(buf);
7816 if (PAGE_SIZE - len)
7817 buf[len++] = '\n';
7818
7819 ofs += 16;
7820 size -= min(size, 16U);
7821 }
7822
7823 return len;
7824 }
7825
7826 static ssize_t store_measurement(struct device *d,
7827 struct device_attribute *attr,
7828 const char *buf, size_t count)
7829 {
7830 struct iwl_priv *priv = dev_get_drvdata(d);
7831 struct ieee80211_measurement_params params = {
7832 .channel = le16_to_cpu(priv->active_rxon.channel),
7833 .start_time = cpu_to_le64(priv->last_tsf),
7834 .duration = cpu_to_le16(1),
7835 };
7836 u8 type = IWL_MEASURE_BASIC;
7837 u8 buffer[32];
7838 u8 channel;
7839
7840 if (count) {
7841 char *p = buffer;
7842 strncpy(buffer, buf, min(sizeof(buffer), count));
7843 channel = simple_strtoul(p, NULL, 0);
7844 if (channel)
7845 params.channel = channel;
7846
7847 p = buffer;
7848 while (*p && *p != ' ')
7849 p++;
7850 if (*p)
7851 type = simple_strtoul(p + 1, NULL, 0);
7852 }
7853
7854 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7855 "channel %d (for '%s')\n", type, params.channel, buf);
7856 iwl_get_measurement(priv, &params, type);
7857
7858 return count;
7859 }
7860
7861 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7862 show_measurement, store_measurement);
7863 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7864
7865 static ssize_t show_rate(struct device *d,
7866 struct device_attribute *attr, char *buf)
7867 {
7868 struct iwl_priv *priv = dev_get_drvdata(d);
7869 unsigned long flags;
7870 int i;
7871
7872 spin_lock_irqsave(&priv->sta_lock, flags);
7873 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7874 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7875 else
7876 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7877 spin_unlock_irqrestore(&priv->sta_lock, flags);
7878
7879 i = iwl_rate_index_from_plcp(i);
7880 if (i == -1)
7881 return sprintf(buf, "0\n");
7882
7883 return sprintf(buf, "%d%s\n",
7884 (iwl_rates[i].ieee >> 1),
7885 (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7886 }
7887
7888 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7889
7890 static ssize_t store_retry_rate(struct device *d,
7891 struct device_attribute *attr,
7892 const char *buf, size_t count)
7893 {
7894 struct iwl_priv *priv = dev_get_drvdata(d);
7895
7896 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7897 if (priv->retry_rate <= 0)
7898 priv->retry_rate = 1;
7899
7900 return count;
7901 }
7902
7903 static ssize_t show_retry_rate(struct device *d,
7904 struct device_attribute *attr, char *buf)
7905 {
7906 struct iwl_priv *priv = dev_get_drvdata(d);
7907 return sprintf(buf, "%d", priv->retry_rate);
7908 }
7909
7910 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7911 store_retry_rate);
7912
7913 static ssize_t store_power_level(struct device *d,
7914 struct device_attribute *attr,
7915 const char *buf, size_t count)
7916 {
7917 struct iwl_priv *priv = dev_get_drvdata(d);
7918 int rc;
7919 int mode;
7920
7921 mode = simple_strtoul(buf, NULL, 0);
7922 mutex_lock(&priv->mutex);
7923
7924 if (!iwl_is_ready(priv)) {
7925 rc = -EAGAIN;
7926 goto out;
7927 }
7928
7929 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7930 mode = IWL_POWER_AC;
7931 else
7932 mode |= IWL_POWER_ENABLED;
7933
7934 if (mode != priv->power_mode) {
7935 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7936 if (rc) {
7937 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7938 goto out;
7939 }
7940 priv->power_mode = mode;
7941 }
7942
7943 rc = count;
7944
7945 out:
7946 mutex_unlock(&priv->mutex);
7947 return rc;
7948 }
7949
7950 #define MAX_WX_STRING 80
7951
7952 /* Values are in microsecond */
7953 static const s32 timeout_duration[] = {
7954 350000,
7955 250000,
7956 75000,
7957 37000,
7958 25000,
7959 };
7960 static const s32 period_duration[] = {
7961 400000,
7962 700000,
7963 1000000,
7964 1000000,
7965 1000000
7966 };
7967
7968 static ssize_t show_power_level(struct device *d,
7969 struct device_attribute *attr, char *buf)
7970 {
7971 struct iwl_priv *priv = dev_get_drvdata(d);
7972 int level = IWL_POWER_LEVEL(priv->power_mode);
7973 char *p = buf;
7974
7975 p += sprintf(p, "%d ", level);
7976 switch (level) {
7977 case IWL_POWER_MODE_CAM:
7978 case IWL_POWER_AC:
7979 p += sprintf(p, "(AC)");
7980 break;
7981 case IWL_POWER_BATTERY:
7982 p += sprintf(p, "(BATTERY)");
7983 break;
7984 default:
7985 p += sprintf(p,
7986 "(Timeout %dms, Period %dms)",
7987 timeout_duration[level - 1] / 1000,
7988 period_duration[level - 1] / 1000);
7989 }
7990
7991 if (!(priv->power_mode & IWL_POWER_ENABLED))
7992 p += sprintf(p, " OFF\n");
7993 else
7994 p += sprintf(p, " \n");
7995
7996 return (p - buf + 1);
7997
7998 }
7999
8000 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8001 store_power_level);
8002
8003 static ssize_t show_channels(struct device *d,
8004 struct device_attribute *attr, char *buf)
8005 {
8006 struct iwl_priv *priv = dev_get_drvdata(d);
8007 int len = 0, i;
8008 struct ieee80211_channel *channels = NULL;
8009 const struct ieee80211_hw_mode *hw_mode = NULL;
8010 int count = 0;
8011
8012 if (!iwl_is_ready(priv))
8013 return -EAGAIN;
8014
8015 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8016 if (!hw_mode)
8017 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8018 if (hw_mode) {
8019 channels = hw_mode->channels;
8020 count = hw_mode->num_channels;
8021 }
8022
8023 len +=
8024 sprintf(&buf[len],
8025 "Displaying %d channels in 2.4GHz band "
8026 "(802.11bg):\n", count);
8027
8028 for (i = 0; i < count; i++)
8029 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8030 channels[i].chan,
8031 channels[i].power_level,
8032 channels[i].
8033 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8034 " (IEEE 802.11h required)" : "",
8035 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8036 || (channels[i].
8037 flag &
8038 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8039 ", IBSS",
8040 channels[i].
8041 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8042 "active/passive" : "passive only");
8043
8044 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8045 if (hw_mode) {
8046 channels = hw_mode->channels;
8047 count = hw_mode->num_channels;
8048 } else {
8049 channels = NULL;
8050 count = 0;
8051 }
8052
8053 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8054 "(802.11a):\n", count);
8055
8056 for (i = 0; i < count; i++)
8057 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8058 channels[i].chan,
8059 channels[i].power_level,
8060 channels[i].
8061 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8062 " (IEEE 802.11h required)" : "",
8063 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8064 || (channels[i].
8065 flag &
8066 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8067 ", IBSS",
8068 channels[i].
8069 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8070 "active/passive" : "passive only");
8071
8072 return len;
8073 }
8074
8075 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8076
8077 static ssize_t show_statistics(struct device *d,
8078 struct device_attribute *attr, char *buf)
8079 {
8080 struct iwl_priv *priv = dev_get_drvdata(d);
8081 u32 size = sizeof(struct iwl_notif_statistics);
8082 u32 len = 0, ofs = 0;
8083 u8 *data = (u8 *) & priv->statistics;
8084 int rc = 0;
8085
8086 if (!iwl_is_alive(priv))
8087 return -EAGAIN;
8088
8089 mutex_lock(&priv->mutex);
8090 rc = iwl_send_statistics_request(priv);
8091 mutex_unlock(&priv->mutex);
8092
8093 if (rc) {
8094 len = sprintf(buf,
8095 "Error sending statistics request: 0x%08X\n", rc);
8096 return len;
8097 }
8098
8099 while (size && (PAGE_SIZE - len)) {
8100 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8101 PAGE_SIZE - len, 1);
8102 len = strlen(buf);
8103 if (PAGE_SIZE - len)
8104 buf[len++] = '\n';
8105
8106 ofs += 16;
8107 size -= min(size, 16U);
8108 }
8109
8110 return len;
8111 }
8112
8113 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8114
8115 static ssize_t show_antenna(struct device *d,
8116 struct device_attribute *attr, char *buf)
8117 {
8118 struct iwl_priv *priv = dev_get_drvdata(d);
8119
8120 if (!iwl_is_alive(priv))
8121 return -EAGAIN;
8122
8123 return sprintf(buf, "%d\n", priv->antenna);
8124 }
8125
8126 static ssize_t store_antenna(struct device *d,
8127 struct device_attribute *attr,
8128 const char *buf, size_t count)
8129 {
8130 int ant;
8131 struct iwl_priv *priv = dev_get_drvdata(d);
8132
8133 if (count == 0)
8134 return 0;
8135
8136 if (sscanf(buf, "%1i", &ant) != 1) {
8137 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8138 return count;
8139 }
8140
8141 if ((ant >= 0) && (ant <= 2)) {
8142 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8143 priv->antenna = (enum iwl_antenna)ant;
8144 } else
8145 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8146
8147
8148 return count;
8149 }
8150
8151 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8152
8153 static ssize_t show_status(struct device *d,
8154 struct device_attribute *attr, char *buf)
8155 {
8156 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8157 if (!iwl_is_alive(priv))
8158 return -EAGAIN;
8159 return sprintf(buf, "0x%08x\n", (int)priv->status);
8160 }
8161
8162 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8163
8164 static ssize_t dump_error_log(struct device *d,
8165 struct device_attribute *attr,
8166 const char *buf, size_t count)
8167 {
8168 char *p = (char *)buf;
8169
8170 if (p[0] == '1')
8171 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8172
8173 return strnlen(buf, count);
8174 }
8175
8176 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8177
8178 static ssize_t dump_event_log(struct device *d,
8179 struct device_attribute *attr,
8180 const char *buf, size_t count)
8181 {
8182 char *p = (char *)buf;
8183
8184 if (p[0] == '1')
8185 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8186
8187 return strnlen(buf, count);
8188 }
8189
8190 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8191
8192 /*****************************************************************************
8193 *
8194 * driver setup and teardown
8195 *
8196 *****************************************************************************/
8197
8198 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8199 {
8200 priv->workqueue = create_workqueue(DRV_NAME);
8201
8202 init_waitqueue_head(&priv->wait_command_queue);
8203
8204 INIT_WORK(&priv->up, iwl_bg_up);
8205 INIT_WORK(&priv->restart, iwl_bg_restart);
8206 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8207 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8208 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8209 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8210 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8211 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8212 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8213 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8214 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8215 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8216
8217 iwl_hw_setup_deferred_work(priv);
8218
8219 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8220 iwl_irq_tasklet, (unsigned long)priv);
8221 }
8222
8223 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8224 {
8225 iwl_hw_cancel_deferred_work(priv);
8226
8227 cancel_delayed_work(&priv->scan_check);
8228 cancel_delayed_work(&priv->alive_start);
8229 cancel_delayed_work(&priv->post_associate);
8230 cancel_work_sync(&priv->beacon_update);
8231 }
8232
8233 static struct attribute *iwl_sysfs_entries[] = {
8234 &dev_attr_antenna.attr,
8235 &dev_attr_channels.attr,
8236 &dev_attr_dump_errors.attr,
8237 &dev_attr_dump_events.attr,
8238 &dev_attr_flags.attr,
8239 &dev_attr_filter_flags.attr,
8240 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8241 &dev_attr_measurement.attr,
8242 #endif
8243 &dev_attr_power_level.attr,
8244 &dev_attr_rate.attr,
8245 &dev_attr_retry_rate.attr,
8246 &dev_attr_rf_kill.attr,
8247 &dev_attr_rs_window.attr,
8248 &dev_attr_statistics.attr,
8249 &dev_attr_status.attr,
8250 &dev_attr_temperature.attr,
8251 &dev_attr_tune.attr,
8252 &dev_attr_tx_power.attr,
8253
8254 NULL
8255 };
8256
8257 static struct attribute_group iwl_attribute_group = {
8258 .name = NULL, /* put in device directory */
8259 .attrs = iwl_sysfs_entries,
8260 };
8261
8262 static struct ieee80211_ops iwl_hw_ops = {
8263 .tx = iwl_mac_tx,
8264 .start = iwl_mac_start,
8265 .stop = iwl_mac_stop,
8266 .add_interface = iwl_mac_add_interface,
8267 .remove_interface = iwl_mac_remove_interface,
8268 .config = iwl_mac_config,
8269 .config_interface = iwl_mac_config_interface,
8270 .configure_filter = iwl_configure_filter,
8271 .set_key = iwl_mac_set_key,
8272 .get_stats = iwl_mac_get_stats,
8273 .get_tx_stats = iwl_mac_get_tx_stats,
8274 .conf_tx = iwl_mac_conf_tx,
8275 .get_tsf = iwl_mac_get_tsf,
8276 .reset_tsf = iwl_mac_reset_tsf,
8277 .beacon_update = iwl_mac_beacon_update,
8278 .hw_scan = iwl_mac_hw_scan
8279 };
8280
8281 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8282 {
8283 int err = 0;
8284 u32 pci_id;
8285 struct iwl_priv *priv;
8286 struct ieee80211_hw *hw;
8287 int i;
8288
8289 if (iwl_param_disable_hw_scan) {
8290 IWL_DEBUG_INFO("Disabling hw_scan\n");
8291 iwl_hw_ops.hw_scan = NULL;
8292 }
8293
8294 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8295 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8296 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8297 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8298 err = -EINVAL;
8299 goto out;
8300 }
8301
8302 /* mac80211 allocates memory for this device instance, including
8303 * space for this driver's private structure */
8304 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8305 if (hw == NULL) {
8306 IWL_ERROR("Can not allocate network device\n");
8307 err = -ENOMEM;
8308 goto out;
8309 }
8310 SET_IEEE80211_DEV(hw, &pdev->dev);
8311
8312 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8313 priv = hw->priv;
8314 priv->hw = hw;
8315
8316 priv->pci_dev = pdev;
8317 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8318 #ifdef CONFIG_IWLWIFI_DEBUG
8319 iwl_debug_level = iwl_param_debug;
8320 atomic_set(&priv->restrict_refcnt, 0);
8321 #endif
8322 priv->retry_rate = 1;
8323
8324 priv->ibss_beacon = NULL;
8325
8326 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8327 * the range of signal quality values that we'll provide.
8328 * Negative values for level/noise indicate that we'll provide dBm.
8329 * For WE, at least, non-0 values here *enable* display of values
8330 * in app (iwconfig). */
8331 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8332 hw->max_noise = -20; /* noise level, negative indicates dBm */
8333 hw->max_signal = 100; /* link quality indication (%) */
8334
8335 /* Tell mac80211 our Tx characteristics */
8336 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8337
8338 hw->queues = 4;
8339
8340 spin_lock_init(&priv->lock);
8341 spin_lock_init(&priv->power_data.lock);
8342 spin_lock_init(&priv->sta_lock);
8343 spin_lock_init(&priv->hcmd_lock);
8344
8345 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8346 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8347
8348 INIT_LIST_HEAD(&priv->free_frames);
8349
8350 mutex_init(&priv->mutex);
8351 if (pci_enable_device(pdev)) {
8352 err = -ENODEV;
8353 goto out_ieee80211_free_hw;
8354 }
8355
8356 pci_set_master(pdev);
8357
8358 iwl_clear_stations_table(priv);
8359
8360 priv->data_retry_limit = -1;
8361 priv->ieee_channels = NULL;
8362 priv->ieee_rates = NULL;
8363 priv->phymode = -1;
8364
8365 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8366 if (!err)
8367 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8368 if (err) {
8369 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8370 goto out_pci_disable_device;
8371 }
8372
8373 pci_set_drvdata(pdev, priv);
8374 err = pci_request_regions(pdev, DRV_NAME);
8375 if (err)
8376 goto out_pci_disable_device;
8377 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8378 * PCI Tx retries from interfering with C3 CPU state */
8379 pci_write_config_byte(pdev, 0x41, 0x00);
8380 priv->hw_base = pci_iomap(pdev, 0, 0);
8381 if (!priv->hw_base) {
8382 err = -ENODEV;
8383 goto out_pci_release_regions;
8384 }
8385
8386 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8387 (unsigned long long) pci_resource_len(pdev, 0));
8388 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8389
8390 /* Initialize module parameter values here */
8391
8392 if (iwl_param_disable) {
8393 set_bit(STATUS_RF_KILL_SW, &priv->status);
8394 IWL_DEBUG_INFO("Radio disabled.\n");
8395 }
8396
8397 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8398
8399 pci_id =
8400 (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8401
8402 switch (pci_id) {
8403 case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
8404 case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
8405 case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
8406 case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
8407 priv->is_abg = 0;
8408 break;
8409
8410 /*
8411 * Rest are assumed ABG SKU -- if this is not the
8412 * case then the card will get the wrong 'Detected'
8413 * line in the kernel log however the code that
8414 * initializes the GEO table will detect no A-band
8415 * channels and remove the is_abg mask.
8416 */
8417 default:
8418 priv->is_abg = 1;
8419 break;
8420 }
8421
8422 printk(KERN_INFO DRV_NAME
8423 ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8424 priv->is_abg ? "A" : "");
8425
8426 /* Device-specific setup */
8427 if (iwl_hw_set_hw_setting(priv)) {
8428 IWL_ERROR("failed to set hw settings\n");
8429 mutex_unlock(&priv->mutex);
8430 goto out_iounmap;
8431 }
8432
8433 #ifdef CONFIG_IWLWIFI_QOS
8434 if (iwl_param_qos_enable)
8435 priv->qos_data.qos_enable = 1;
8436
8437 iwl_reset_qos(priv);
8438
8439 priv->qos_data.qos_active = 0;
8440 priv->qos_data.qos_cap.val = 0;
8441 #endif /* CONFIG_IWLWIFI_QOS */
8442
8443 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8444 iwl_setup_deferred_work(priv);
8445 iwl_setup_rx_handlers(priv);
8446
8447 priv->rates_mask = IWL_RATES_MASK;
8448 /* If power management is turned on, default to AC mode */
8449 priv->power_mode = IWL_POWER_AC;
8450 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8451
8452 pci_enable_msi(pdev);
8453
8454 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8455 if (err) {
8456 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8457 goto out_disable_msi;
8458 }
8459
8460 mutex_lock(&priv->mutex);
8461
8462 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8463 if (err) {
8464 IWL_ERROR("failed to create sysfs device attributes\n");
8465 mutex_unlock(&priv->mutex);
8466 goto out_release_irq;
8467 }
8468
8469 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8470 * ucode filename and max sizes are card-specific. */
8471 err = iwl_read_ucode(priv);
8472 if (err) {
8473 IWL_ERROR("Could not read microcode: %d\n", err);
8474 mutex_unlock(&priv->mutex);
8475 goto out_pci_alloc;
8476 }
8477
8478 mutex_unlock(&priv->mutex);
8479
8480 IWL_DEBUG_INFO("Queing UP work.\n");
8481
8482 queue_work(priv->workqueue, &priv->up);
8483
8484 return 0;
8485
8486 out_pci_alloc:
8487 iwl_dealloc_ucode_pci(priv);
8488
8489 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8490
8491 out_release_irq:
8492 free_irq(pdev->irq, priv);
8493
8494 out_disable_msi:
8495 pci_disable_msi(pdev);
8496 destroy_workqueue(priv->workqueue);
8497 priv->workqueue = NULL;
8498 iwl_unset_hw_setting(priv);
8499
8500 out_iounmap:
8501 pci_iounmap(pdev, priv->hw_base);
8502 out_pci_release_regions:
8503 pci_release_regions(pdev);
8504 out_pci_disable_device:
8505 pci_disable_device(pdev);
8506 pci_set_drvdata(pdev, NULL);
8507 out_ieee80211_free_hw:
8508 ieee80211_free_hw(priv->hw);
8509 out:
8510 return err;
8511 }
8512
8513 static void iwl_pci_remove(struct pci_dev *pdev)
8514 {
8515 struct iwl_priv *priv = pci_get_drvdata(pdev);
8516 struct list_head *p, *q;
8517 int i;
8518
8519 if (!priv)
8520 return;
8521
8522 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8523
8524 mutex_lock(&priv->mutex);
8525 set_bit(STATUS_EXIT_PENDING, &priv->status);
8526 __iwl_down(priv);
8527 mutex_unlock(&priv->mutex);
8528
8529 /* Free MAC hash list for ADHOC */
8530 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8531 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8532 list_del(p);
8533 kfree(list_entry(p, struct iwl_ibss_seq, list));
8534 }
8535 }
8536
8537 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8538
8539 iwl_dealloc_ucode_pci(priv);
8540
8541 if (priv->rxq.bd)
8542 iwl_rx_queue_free(priv, &priv->rxq);
8543 iwl_hw_txq_ctx_free(priv);
8544
8545 iwl_unset_hw_setting(priv);
8546 iwl_clear_stations_table(priv);
8547
8548 if (priv->mac80211_registered) {
8549 ieee80211_unregister_hw(priv->hw);
8550 iwl_rate_control_unregister(priv->hw);
8551 }
8552
8553 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8554 * priv->workqueue... so we can't take down the workqueue
8555 * until now... */
8556 destroy_workqueue(priv->workqueue);
8557 priv->workqueue = NULL;
8558
8559 free_irq(pdev->irq, priv);
8560 pci_disable_msi(pdev);
8561 pci_iounmap(pdev, priv->hw_base);
8562 pci_release_regions(pdev);
8563 pci_disable_device(pdev);
8564 pci_set_drvdata(pdev, NULL);
8565
8566 kfree(priv->channel_info);
8567
8568 kfree(priv->ieee_channels);
8569 kfree(priv->ieee_rates);
8570
8571 if (priv->ibss_beacon)
8572 dev_kfree_skb(priv->ibss_beacon);
8573
8574 ieee80211_free_hw(priv->hw);
8575 }
8576
8577 #ifdef CONFIG_PM
8578
8579 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8580 {
8581 struct iwl_priv *priv = pci_get_drvdata(pdev);
8582
8583 mutex_lock(&priv->mutex);
8584
8585 set_bit(STATUS_IN_SUSPEND, &priv->status);
8586
8587 /* Take down the device; powers it off, etc. */
8588 __iwl_down(priv);
8589
8590 if (priv->mac80211_registered)
8591 ieee80211_stop_queues(priv->hw);
8592
8593 pci_save_state(pdev);
8594 pci_disable_device(pdev);
8595 pci_set_power_state(pdev, PCI_D3hot);
8596
8597 mutex_unlock(&priv->mutex);
8598
8599 return 0;
8600 }
8601
8602 static void iwl_resume(struct iwl_priv *priv)
8603 {
8604 unsigned long flags;
8605
8606 /* The following it a temporary work around due to the
8607 * suspend / resume not fully initializing the NIC correctly.
8608 * Without all of the following, resume will not attempt to take
8609 * down the NIC (it shouldn't really need to) and will just try
8610 * and bring the NIC back up. However that fails during the
8611 * ucode verification process. This then causes iwl_down to be
8612 * called *after* iwl_hw_nic_init() has succeeded -- which
8613 * then lets the next init sequence succeed. So, we've
8614 * replicated all of that NIC init code here... */
8615
8616 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8617
8618 iwl_hw_nic_init(priv);
8619
8620 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8621 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8622 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8623 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8624 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8625 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8626
8627 /* tell the device to stop sending interrupts */
8628 iwl_disable_interrupts(priv);
8629
8630 spin_lock_irqsave(&priv->lock, flags);
8631 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8632
8633 if (!iwl_grab_restricted_access(priv)) {
8634 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8635 APMG_CLK_VAL_DMA_CLK_RQT);
8636 iwl_release_restricted_access(priv);
8637 }
8638 spin_unlock_irqrestore(&priv->lock, flags);
8639
8640 udelay(5);
8641
8642 iwl_hw_nic_reset(priv);
8643
8644 /* Bring the device back up */
8645 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8646 queue_work(priv->workqueue, &priv->up);
8647 }
8648
8649 static int iwl_pci_resume(struct pci_dev *pdev)
8650 {
8651 struct iwl_priv *priv = pci_get_drvdata(pdev);
8652 int err;
8653
8654 printk(KERN_INFO "Coming out of suspend...\n");
8655
8656 mutex_lock(&priv->mutex);
8657
8658 pci_set_power_state(pdev, PCI_D0);
8659 err = pci_enable_device(pdev);
8660 pci_restore_state(pdev);
8661
8662 /*
8663 * Suspend/Resume resets the PCI configuration space, so we have to
8664 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8665 * from interfering with C3 CPU state. pci_restore_state won't help
8666 * here since it only restores the first 64 bytes pci config header.
8667 */
8668 pci_write_config_byte(pdev, 0x41, 0x00);
8669
8670 iwl_resume(priv);
8671 mutex_unlock(&priv->mutex);
8672
8673 return 0;
8674 }
8675
8676 #endif /* CONFIG_PM */
8677
8678 /*****************************************************************************
8679 *
8680 * driver and module entry point
8681 *
8682 *****************************************************************************/
8683
8684 static struct pci_driver iwl_driver = {
8685 .name = DRV_NAME,
8686 .id_table = iwl_hw_card_ids,
8687 .probe = iwl_pci_probe,
8688 .remove = __devexit_p(iwl_pci_remove),
8689 #ifdef CONFIG_PM
8690 .suspend = iwl_pci_suspend,
8691 .resume = iwl_pci_resume,
8692 #endif
8693 };
8694
8695 static int __init iwl_init(void)
8696 {
8697
8698 int ret;
8699 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8700 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8701 ret = pci_register_driver(&iwl_driver);
8702 if (ret) {
8703 IWL_ERROR("Unable to initialize PCI module\n");
8704 return ret;
8705 }
8706 #ifdef CONFIG_IWLWIFI_DEBUG
8707 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8708 if (ret) {
8709 IWL_ERROR("Unable to create driver sysfs file\n");
8710 pci_unregister_driver(&iwl_driver);
8711 return ret;
8712 }
8713 #endif
8714
8715 return ret;
8716 }
8717
8718 static void __exit iwl_exit(void)
8719 {
8720 #ifdef CONFIG_IWLWIFI_DEBUG
8721 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8722 #endif
8723 pci_unregister_driver(&iwl_driver);
8724 }
8725
8726 module_param_named(antenna, iwl_param_antenna, int, 0444);
8727 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8728 module_param_named(disable, iwl_param_disable, int, 0444);
8729 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8730 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8731 MODULE_PARM_DESC(hwcrypto,
8732 "using hardware crypto engine (default 0 [software])\n");
8733 module_param_named(debug, iwl_param_debug, int, 0444);
8734 MODULE_PARM_DESC(debug, "debug output mask");
8735 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8736 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8737
8738 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8739 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8740
8741 /* QoS */
8742 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8743 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8744
8745 module_exit(iwl_exit);
8746 module_init(iwl_init);
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