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libertas: let more than one MAC event through
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
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/etherdevice.h>
52 #include <linux/if_arp.h>
53
54 #include <net/ieee80211_radiotap.h>
55 #include <net/mac80211.h>
56
57 #include <asm/div64.h>
58
59 #define IWL 3945
60
61 #include "iwlwifi.h"
62 #include "iwl-3945.h"
63 #include "iwl-helpers.h"
64
65 #ifdef CONFIG_IWLWIFI_DEBUG
66 u32 iwl_debug_level;
67 #endif
68
69 /******************************************************************************
70 *
71 * module boiler plate
72 *
73 ******************************************************************************/
74
75 /* module parameters */
76 int iwl_param_disable_hw_scan;
77 int iwl_param_debug;
78 int iwl_param_disable; /* def: enable radio */
79 int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
80 int iwl_param_hwcrypto; /* def: using software encryption */
81 int iwl_param_qos_enable = 1;
82 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
83
84 /*
85 * module name, copyright, version, etc.
86 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
87 */
88
89 #define DRV_DESCRIPTION \
90 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
91
92 #ifdef CONFIG_IWLWIFI_DEBUG
93 #define VD "d"
94 #else
95 #define VD
96 #endif
97
98 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
99 #define VS "s"
100 #else
101 #define VS
102 #endif
103
104 #define IWLWIFI_VERSION "1.1.17k" VD VS
105 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
106 #define DRV_VERSION IWLWIFI_VERSION
107
108 /* Change firmware file name, using "-" and incrementing number,
109 * *only* when uCode interface or architecture changes so that it
110 * is not compatible with earlier drivers.
111 * This number will also appear in << 8 position of 1st dword of uCode file */
112 #define IWL3945_UCODE_API "-1"
113
114 MODULE_DESCRIPTION(DRV_DESCRIPTION);
115 MODULE_VERSION(DRV_VERSION);
116 MODULE_AUTHOR(DRV_COPYRIGHT);
117 MODULE_LICENSE("GPL");
118
119 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
120 {
121 u16 fc = le16_to_cpu(hdr->frame_control);
122 int hdr_len = ieee80211_get_hdrlen(fc);
123
124 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
125 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
126 return NULL;
127 }
128
129 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
130 struct iwl_priv *priv, int mode)
131 {
132 int i;
133
134 for (i = 0; i < 3; i++)
135 if (priv->modes[i].mode == mode)
136 return &priv->modes[i];
137
138 return NULL;
139 }
140
141 static int iwl_is_empty_essid(const char *essid, int essid_len)
142 {
143 /* Single white space is for Linksys APs */
144 if (essid_len == 1 && essid[0] == ' ')
145 return 1;
146
147 /* Otherwise, if the entire essid is 0, we assume it is hidden */
148 while (essid_len) {
149 essid_len--;
150 if (essid[essid_len] != '\0')
151 return 0;
152 }
153
154 return 1;
155 }
156
157 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
158 {
159 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
160 const char *s = essid;
161 char *d = escaped;
162
163 if (iwl_is_empty_essid(essid, essid_len)) {
164 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
165 return escaped;
166 }
167
168 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
169 while (essid_len--) {
170 if (*s == '\0') {
171 *d++ = '\\';
172 *d++ = '0';
173 s++;
174 } else
175 *d++ = *s++;
176 }
177 *d = '\0';
178 return escaped;
179 }
180
181 static void iwl_print_hex_dump(int level, void *p, u32 len)
182 {
183 #ifdef CONFIG_IWLWIFI_DEBUG
184 if (!(iwl_debug_level & level))
185 return;
186
187 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
188 p, len, 1);
189 #endif
190 }
191
192 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
193 * DMA services
194 *
195 * Theory of operation
196 *
197 * A queue is a circular buffers with 'Read' and 'Write' pointers.
198 * 2 empty entries always kept in the buffer to protect from overflow.
199 *
200 * For Tx queue, there are low mark and high mark limits. If, after queuing
201 * the packet for Tx, free space become < low mark, Tx queue stopped. When
202 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
203 * Tx queue resumed.
204 *
205 * The IWL operates with six queues, one receive queue in the device's
206 * sram, one transmit queue for sending commands to the device firmware,
207 * and four transmit queues for data.
208 ***************************************************/
209
210 static int iwl_queue_space(const struct iwl_queue *q)
211 {
212 int s = q->last_used - q->first_empty;
213
214 if (q->last_used > q->first_empty)
215 s -= q->n_bd;
216
217 if (s <= 0)
218 s += q->n_window;
219 /* keep some reserve to not confuse empty and full situations */
220 s -= 2;
221 if (s < 0)
222 s = 0;
223 return s;
224 }
225
226 /* XXX: n_bd must be power-of-two size */
227 static inline int iwl_queue_inc_wrap(int index, int n_bd)
228 {
229 return ++index & (n_bd - 1);
230 }
231
232 /* XXX: n_bd must be power-of-two size */
233 static inline int iwl_queue_dec_wrap(int index, int n_bd)
234 {
235 return --index & (n_bd - 1);
236 }
237
238 static inline int x2_queue_used(const struct iwl_queue *q, int i)
239 {
240 return q->first_empty > q->last_used ?
241 (i >= q->last_used && i < q->first_empty) :
242 !(i < q->last_used && i >= q->first_empty);
243 }
244
245 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
246 {
247 if (is_huge)
248 return q->n_window;
249
250 return index & (q->n_window - 1);
251 }
252
253 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
254 int count, int slots_num, u32 id)
255 {
256 q->n_bd = count;
257 q->n_window = slots_num;
258 q->id = id;
259
260 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
261 * and iwl_queue_dec_wrap are broken. */
262 BUG_ON(!is_power_of_2(count));
263
264 /* slots_num must be power-of-two size, otherwise
265 * get_cmd_index is broken. */
266 BUG_ON(!is_power_of_2(slots_num));
267
268 q->low_mark = q->n_window / 4;
269 if (q->low_mark < 4)
270 q->low_mark = 4;
271
272 q->high_mark = q->n_window / 8;
273 if (q->high_mark < 2)
274 q->high_mark = 2;
275
276 q->first_empty = q->last_used = 0;
277
278 return 0;
279 }
280
281 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
282 struct iwl_tx_queue *txq, u32 id)
283 {
284 struct pci_dev *dev = priv->pci_dev;
285
286 if (id != IWL_CMD_QUEUE_NUM) {
287 txq->txb = kmalloc(sizeof(txq->txb[0]) *
288 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
289 if (!txq->txb) {
290 IWL_ERROR("kmalloc for auxilary BD "
291 "structures failed\n");
292 goto error;
293 }
294 } else
295 txq->txb = NULL;
296
297 txq->bd = pci_alloc_consistent(dev,
298 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
299 &txq->q.dma_addr);
300
301 if (!txq->bd) {
302 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
303 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
304 goto error;
305 }
306 txq->q.id = id;
307
308 return 0;
309
310 error:
311 if (txq->txb) {
312 kfree(txq->txb);
313 txq->txb = NULL;
314 }
315
316 return -ENOMEM;
317 }
318
319 int iwl_tx_queue_init(struct iwl_priv *priv,
320 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
321 {
322 struct pci_dev *dev = priv->pci_dev;
323 int len;
324 int rc = 0;
325
326 /* alocate command space + one big command for scan since scan
327 * command is very huge the system will not have two scan at the
328 * same time */
329 len = sizeof(struct iwl_cmd) * slots_num;
330 if (txq_id == IWL_CMD_QUEUE_NUM)
331 len += IWL_MAX_SCAN_SIZE;
332 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
333 if (!txq->cmd)
334 return -ENOMEM;
335
336 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
337 if (rc) {
338 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
339
340 return -ENOMEM;
341 }
342 txq->need_update = 0;
343
344 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
345 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
346 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
347 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
348
349 iwl_hw_tx_queue_init(priv, txq);
350
351 return 0;
352 }
353
354 /**
355 * iwl_tx_queue_free - Deallocate DMA queue.
356 * @txq: Transmit queue to deallocate.
357 *
358 * Empty queue by removing and destroying all BD's.
359 * Free all buffers. txq itself is not freed.
360 *
361 */
362 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
363 {
364 struct iwl_queue *q = &txq->q;
365 struct pci_dev *dev = priv->pci_dev;
366 int len;
367
368 if (q->n_bd == 0)
369 return;
370
371 /* first, empty all BD's */
372 for (; q->first_empty != q->last_used;
373 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
374 iwl_hw_txq_free_tfd(priv, txq);
375
376 len = sizeof(struct iwl_cmd) * q->n_window;
377 if (q->id == IWL_CMD_QUEUE_NUM)
378 len += IWL_MAX_SCAN_SIZE;
379
380 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
381
382 /* free buffers belonging to queue itself */
383 if (txq->q.n_bd)
384 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
385 txq->q.n_bd, txq->bd, txq->q.dma_addr);
386
387 if (txq->txb) {
388 kfree(txq->txb);
389 txq->txb = NULL;
390 }
391
392 /* 0 fill whole structure */
393 memset(txq, 0, sizeof(*txq));
394 }
395
396 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
397
398 /*************** STATION TABLE MANAGEMENT ****
399 *
400 * NOTE: This needs to be overhauled to better synchronize between
401 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
402 *
403 * mac80211 should also be examined to determine if sta_info is duplicating
404 * the functionality provided here
405 */
406
407 /**************************************************************/
408 #if 0 /* temparary disable till we add real remove station */
409 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
410 {
411 int index = IWL_INVALID_STATION;
412 int i;
413 unsigned long flags;
414
415 spin_lock_irqsave(&priv->sta_lock, flags);
416
417 if (is_ap)
418 index = IWL_AP_ID;
419 else if (is_broadcast_ether_addr(addr))
420 index = priv->hw_setting.bcast_sta_id;
421 else
422 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
423 if (priv->stations[i].used &&
424 !compare_ether_addr(priv->stations[i].sta.sta.addr,
425 addr)) {
426 index = i;
427 break;
428 }
429
430 if (unlikely(index == IWL_INVALID_STATION))
431 goto out;
432
433 if (priv->stations[index].used) {
434 priv->stations[index].used = 0;
435 priv->num_stations--;
436 }
437
438 BUG_ON(priv->num_stations < 0);
439
440 out:
441 spin_unlock_irqrestore(&priv->sta_lock, flags);
442 return 0;
443 }
444 #endif
445 static void iwl_clear_stations_table(struct iwl_priv *priv)
446 {
447 unsigned long flags;
448
449 spin_lock_irqsave(&priv->sta_lock, flags);
450
451 priv->num_stations = 0;
452 memset(priv->stations, 0, sizeof(priv->stations));
453
454 spin_unlock_irqrestore(&priv->sta_lock, flags);
455 }
456
457
458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
459 {
460 int i;
461 int index = IWL_INVALID_STATION;
462 struct iwl_station_entry *station;
463 unsigned long flags_spin;
464 DECLARE_MAC_BUF(mac);
465 u8 rate;
466
467 spin_lock_irqsave(&priv->sta_lock, flags_spin);
468 if (is_ap)
469 index = IWL_AP_ID;
470 else if (is_broadcast_ether_addr(addr))
471 index = priv->hw_setting.bcast_sta_id;
472 else
473 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
474 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
475 addr)) {
476 index = i;
477 break;
478 }
479
480 if (!priv->stations[i].used &&
481 index == IWL_INVALID_STATION)
482 index = i;
483 }
484
485 /* These twh conditions has the same outcome but keep them separate
486 since they have different meaning */
487 if (unlikely(index == IWL_INVALID_STATION)) {
488 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
489 return index;
490 }
491
492 if (priv->stations[index].used &&
493 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
494 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
495 return index;
496 }
497
498 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
499 station = &priv->stations[index];
500 station->used = 1;
501 priv->num_stations++;
502
503 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
504 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
505 station->sta.mode = 0;
506 station->sta.sta.sta_id = index;
507 station->sta.station_flags = 0;
508
509 rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
510 IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
511
512 /* Turn on both antennas for the station... */
513 station->sta.rate_n_flags =
514 iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
515 station->current_rate.rate_n_flags =
516 le16_to_cpu(station->sta.rate_n_flags);
517
518 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
519 iwl_send_add_station(priv, &station->sta, flags);
520 return index;
521
522 }
523
524 /*************** DRIVER STATUS FUNCTIONS *****/
525
526 static inline int iwl_is_ready(struct iwl_priv *priv)
527 {
528 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
529 * set but EXIT_PENDING is not */
530 return test_bit(STATUS_READY, &priv->status) &&
531 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
532 !test_bit(STATUS_EXIT_PENDING, &priv->status);
533 }
534
535 static inline int iwl_is_alive(struct iwl_priv *priv)
536 {
537 return test_bit(STATUS_ALIVE, &priv->status);
538 }
539
540 static inline int iwl_is_init(struct iwl_priv *priv)
541 {
542 return test_bit(STATUS_INIT, &priv->status);
543 }
544
545 static inline int iwl_is_rfkill(struct iwl_priv *priv)
546 {
547 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
548 test_bit(STATUS_RF_KILL_SW, &priv->status);
549 }
550
551 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
552 {
553
554 if (iwl_is_rfkill(priv))
555 return 0;
556
557 return iwl_is_ready(priv);
558 }
559
560 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
561
562 #define IWL_CMD(x) case x : return #x
563
564 static const char *get_cmd_string(u8 cmd)
565 {
566 switch (cmd) {
567 IWL_CMD(REPLY_ALIVE);
568 IWL_CMD(REPLY_ERROR);
569 IWL_CMD(REPLY_RXON);
570 IWL_CMD(REPLY_RXON_ASSOC);
571 IWL_CMD(REPLY_QOS_PARAM);
572 IWL_CMD(REPLY_RXON_TIMING);
573 IWL_CMD(REPLY_ADD_STA);
574 IWL_CMD(REPLY_REMOVE_STA);
575 IWL_CMD(REPLY_REMOVE_ALL_STA);
576 IWL_CMD(REPLY_3945_RX);
577 IWL_CMD(REPLY_TX);
578 IWL_CMD(REPLY_RATE_SCALE);
579 IWL_CMD(REPLY_LEDS_CMD);
580 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
581 IWL_CMD(RADAR_NOTIFICATION);
582 IWL_CMD(REPLY_QUIET_CMD);
583 IWL_CMD(REPLY_CHANNEL_SWITCH);
584 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
585 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
586 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
587 IWL_CMD(POWER_TABLE_CMD);
588 IWL_CMD(PM_SLEEP_NOTIFICATION);
589 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
590 IWL_CMD(REPLY_SCAN_CMD);
591 IWL_CMD(REPLY_SCAN_ABORT_CMD);
592 IWL_CMD(SCAN_START_NOTIFICATION);
593 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
594 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
595 IWL_CMD(BEACON_NOTIFICATION);
596 IWL_CMD(REPLY_TX_BEACON);
597 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
598 IWL_CMD(QUIET_NOTIFICATION);
599 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
600 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
601 IWL_CMD(REPLY_BT_CONFIG);
602 IWL_CMD(REPLY_STATISTICS_CMD);
603 IWL_CMD(STATISTICS_NOTIFICATION);
604 IWL_CMD(REPLY_CARD_STATE_CMD);
605 IWL_CMD(CARD_STATE_NOTIFICATION);
606 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
607 default:
608 return "UNKNOWN";
609
610 }
611 }
612
613 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
614
615 /**
616 * iwl_enqueue_hcmd - enqueue a uCode command
617 * @priv: device private data point
618 * @cmd: a point to the ucode command structure
619 *
620 * The function returns < 0 values to indicate the operation is
621 * failed. On success, it turns the index (> 0) of command in the
622 * command queue.
623 */
624 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
625 {
626 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
627 struct iwl_queue *q = &txq->q;
628 struct iwl_tfd_frame *tfd;
629 u32 *control_flags;
630 struct iwl_cmd *out_cmd;
631 u32 idx;
632 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
633 dma_addr_t phys_addr;
634 int pad;
635 u16 count;
636 int ret;
637 unsigned long flags;
638
639 /* If any of the command structures end up being larger than
640 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
641 * we will need to increase the size of the TFD entries */
642 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
643 !(cmd->meta.flags & CMD_SIZE_HUGE));
644
645 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
646 IWL_ERROR("No space for Tx\n");
647 return -ENOSPC;
648 }
649
650 spin_lock_irqsave(&priv->hcmd_lock, flags);
651
652 tfd = &txq->bd[q->first_empty];
653 memset(tfd, 0, sizeof(*tfd));
654
655 control_flags = (u32 *) tfd;
656
657 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
658 out_cmd = &txq->cmd[idx];
659
660 out_cmd->hdr.cmd = cmd->id;
661 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
662 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
663
664 /* At this point, the out_cmd now has all of the incoming cmd
665 * information */
666
667 out_cmd->hdr.flags = 0;
668 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
669 INDEX_TO_SEQ(q->first_empty));
670 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
671 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
672
673 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
674 offsetof(struct iwl_cmd, hdr);
675 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
676
677 pad = U32_PAD(cmd->len);
678 count = TFD_CTL_COUNT_GET(*control_flags);
679 *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
680
681 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
682 "%d bytes at %d[%d]:%d\n",
683 get_cmd_string(out_cmd->hdr.cmd),
684 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
685 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
686
687 txq->need_update = 1;
688 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
689 ret = iwl_tx_queue_update_write_ptr(priv, txq);
690
691 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
692 return ret ? ret : idx;
693 }
694
695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
696 {
697 int ret;
698
699 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
700
701 /* An asynchronous command can not expect an SKB to be set. */
702 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
703
704 /* An asynchronous command MUST have a callback. */
705 BUG_ON(!cmd->meta.u.callback);
706
707 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
708 return -EBUSY;
709
710 ret = iwl_enqueue_hcmd(priv, cmd);
711 if (ret < 0) {
712 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
713 get_cmd_string(cmd->id), ret);
714 return ret;
715 }
716 return 0;
717 }
718
719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
720 {
721 int cmd_idx;
722 int ret;
723 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
724
725 BUG_ON(cmd->meta.flags & CMD_ASYNC);
726
727 /* A synchronous command can not have a callback set. */
728 BUG_ON(cmd->meta.u.callback != NULL);
729
730 if (atomic_xchg(&entry, 1)) {
731 IWL_ERROR("Error sending %s: Already sending a host command\n",
732 get_cmd_string(cmd->id));
733 return -EBUSY;
734 }
735
736 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
737
738 if (cmd->meta.flags & CMD_WANT_SKB)
739 cmd->meta.source = &cmd->meta;
740
741 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
742 if (cmd_idx < 0) {
743 ret = cmd_idx;
744 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
745 get_cmd_string(cmd->id), ret);
746 goto out;
747 }
748
749 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
750 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
751 HOST_COMPLETE_TIMEOUT);
752 if (!ret) {
753 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
754 IWL_ERROR("Error sending %s: time out after %dms.\n",
755 get_cmd_string(cmd->id),
756 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
757
758 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
759 ret = -ETIMEDOUT;
760 goto cancel;
761 }
762 }
763
764 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
765 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
766 get_cmd_string(cmd->id));
767 ret = -ECANCELED;
768 goto fail;
769 }
770 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
771 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
772 get_cmd_string(cmd->id));
773 ret = -EIO;
774 goto fail;
775 }
776 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
777 IWL_ERROR("Error: Response NULL in '%s'\n",
778 get_cmd_string(cmd->id));
779 ret = -EIO;
780 goto out;
781 }
782
783 ret = 0;
784 goto out;
785
786 cancel:
787 if (cmd->meta.flags & CMD_WANT_SKB) {
788 struct iwl_cmd *qcmd;
789
790 /* Cancel the CMD_WANT_SKB flag for the cmd in the
791 * TX cmd queue. Otherwise in case the cmd comes
792 * in later, it will possibly set an invalid
793 * address (cmd->meta.source). */
794 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
795 qcmd->meta.flags &= ~CMD_WANT_SKB;
796 }
797 fail:
798 if (cmd->meta.u.skb) {
799 dev_kfree_skb_any(cmd->meta.u.skb);
800 cmd->meta.u.skb = NULL;
801 }
802 out:
803 atomic_set(&entry, 0);
804 return ret;
805 }
806
807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
808 {
809 /* A command can not be asynchronous AND expect an SKB to be set. */
810 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
811 (cmd->meta.flags & CMD_WANT_SKB));
812
813 if (cmd->meta.flags & CMD_ASYNC)
814 return iwl_send_cmd_async(priv, cmd);
815
816 return iwl_send_cmd_sync(priv, cmd);
817 }
818
819 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
820 {
821 struct iwl_host_cmd cmd = {
822 .id = id,
823 .len = len,
824 .data = data,
825 };
826
827 return iwl_send_cmd_sync(priv, &cmd);
828 }
829
830 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
831 {
832 struct iwl_host_cmd cmd = {
833 .id = id,
834 .len = sizeof(val),
835 .data = &val,
836 };
837
838 return iwl_send_cmd_sync(priv, &cmd);
839 }
840
841 int iwl_send_statistics_request(struct iwl_priv *priv)
842 {
843 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
844 }
845
846 /**
847 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
848 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
849 * @channel: Any channel valid for the requested phymode
850
851 * In addition to setting the staging RXON, priv->phymode is also set.
852 *
853 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
854 * in the staging RXON flag structure based on the phymode
855 */
856 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
857 {
858 if (!iwl_get_channel_info(priv, phymode, channel)) {
859 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
860 channel, phymode);
861 return -EINVAL;
862 }
863
864 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
865 (priv->phymode == phymode))
866 return 0;
867
868 priv->staging_rxon.channel = cpu_to_le16(channel);
869 if (phymode == MODE_IEEE80211A)
870 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
871 else
872 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
873
874 priv->phymode = phymode;
875
876 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
877
878 return 0;
879 }
880
881 /**
882 * iwl_check_rxon_cmd - validate RXON structure is valid
883 *
884 * NOTE: This is really only useful during development and can eventually
885 * be #ifdef'd out once the driver is stable and folks aren't actively
886 * making changes
887 */
888 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
889 {
890 int error = 0;
891 int counter = 1;
892
893 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
894 error |= le32_to_cpu(rxon->flags &
895 (RXON_FLG_TGJ_NARROW_BAND_MSK |
896 RXON_FLG_RADAR_DETECT_MSK));
897 if (error)
898 IWL_WARNING("check 24G fields %d | %d\n",
899 counter++, error);
900 } else {
901 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
902 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
903 if (error)
904 IWL_WARNING("check 52 fields %d | %d\n",
905 counter++, error);
906 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
907 if (error)
908 IWL_WARNING("check 52 CCK %d | %d\n",
909 counter++, error);
910 }
911 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
912 if (error)
913 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
914
915 /* make sure basic rates 6Mbps and 1Mbps are supported */
916 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
917 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
918 if (error)
919 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
920
921 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
922 if (error)
923 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
924
925 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
926 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
927 if (error)
928 IWL_WARNING("check CCK and short slot %d | %d\n",
929 counter++, error);
930
931 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
932 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
933 if (error)
934 IWL_WARNING("check CCK & auto detect %d | %d\n",
935 counter++, error);
936
937 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
938 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
939 if (error)
940 IWL_WARNING("check TGG and auto detect %d | %d\n",
941 counter++, error);
942
943 if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
944 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
945 RXON_FLG_ANT_A_MSK)) == 0);
946 if (error)
947 IWL_WARNING("check antenna %d %d\n", counter++, error);
948
949 if (error)
950 IWL_WARNING("Tuning to channel %d\n",
951 le16_to_cpu(rxon->channel));
952
953 if (error) {
954 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
955 return -1;
956 }
957 return 0;
958 }
959
960 /**
961 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
962 * @priv: staging_rxon is comapred to active_rxon
963 *
964 * If the RXON structure is changing sufficient to require a new
965 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
966 * to indicate a new tune is required.
967 */
968 static int iwl_full_rxon_required(struct iwl_priv *priv)
969 {
970
971 /* These items are only settable from the full RXON command */
972 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
973 compare_ether_addr(priv->staging_rxon.bssid_addr,
974 priv->active_rxon.bssid_addr) ||
975 compare_ether_addr(priv->staging_rxon.node_addr,
976 priv->active_rxon.node_addr) ||
977 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
978 priv->active_rxon.wlap_bssid_addr) ||
979 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
980 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
981 (priv->staging_rxon.air_propagation !=
982 priv->active_rxon.air_propagation) ||
983 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
984 return 1;
985
986 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
987 * be updated with the RXON_ASSOC command -- however only some
988 * flag transitions are allowed using RXON_ASSOC */
989
990 /* Check if we are not switching bands */
991 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
992 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
993 return 1;
994
995 /* Check if we are switching association toggle */
996 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
997 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
998 return 1;
999
1000 return 0;
1001 }
1002
1003 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1004 {
1005 int rc = 0;
1006 struct iwl_rx_packet *res = NULL;
1007 struct iwl_rxon_assoc_cmd rxon_assoc;
1008 struct iwl_host_cmd cmd = {
1009 .id = REPLY_RXON_ASSOC,
1010 .len = sizeof(rxon_assoc),
1011 .meta.flags = CMD_WANT_SKB,
1012 .data = &rxon_assoc,
1013 };
1014 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1015 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1016
1017 if ((rxon1->flags == rxon2->flags) &&
1018 (rxon1->filter_flags == rxon2->filter_flags) &&
1019 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1020 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1021 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1022 return 0;
1023 }
1024
1025 rxon_assoc.flags = priv->staging_rxon.flags;
1026 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1027 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1028 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1029 rxon_assoc.reserved = 0;
1030
1031 rc = iwl_send_cmd_sync(priv, &cmd);
1032 if (rc)
1033 return rc;
1034
1035 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1036 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1037 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1038 rc = -EIO;
1039 }
1040
1041 priv->alloc_rxb_skb--;
1042 dev_kfree_skb_any(cmd.meta.u.skb);
1043
1044 return rc;
1045 }
1046
1047 /**
1048 * iwl_commit_rxon - commit staging_rxon to hardware
1049 *
1050 * The RXON command in staging_rxon is commited to the hardware and
1051 * the active_rxon structure is updated with the new data. This
1052 * function correctly transitions out of the RXON_ASSOC_MSK state if
1053 * a HW tune is required based on the RXON structure changes.
1054 */
1055 static int iwl_commit_rxon(struct iwl_priv *priv)
1056 {
1057 /* cast away the const for active_rxon in this function */
1058 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1059 int rc = 0;
1060 DECLARE_MAC_BUF(mac);
1061
1062 if (!iwl_is_alive(priv))
1063 return -1;
1064
1065 /* always get timestamp with Rx frame */
1066 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1067
1068 /* select antenna */
1069 priv->staging_rxon.flags &=
1070 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1071 priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1072
1073 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1074 if (rc) {
1075 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1076 return -EINVAL;
1077 }
1078
1079 /* If we don't need to send a full RXON, we can use
1080 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1081 * and other flags for the current radio configuration. */
1082 if (!iwl_full_rxon_required(priv)) {
1083 rc = iwl_send_rxon_assoc(priv);
1084 if (rc) {
1085 IWL_ERROR("Error setting RXON_ASSOC "
1086 "configuration (%d).\n", rc);
1087 return rc;
1088 }
1089
1090 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1091
1092 return 0;
1093 }
1094
1095 /* If we are currently associated and the new config requires
1096 * an RXON_ASSOC and the new config wants the associated mask enabled,
1097 * we must clear the associated from the active configuration
1098 * before we apply the new config */
1099 if (iwl_is_associated(priv) &&
1100 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1101 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1102 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1103
1104 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1105 sizeof(struct iwl_rxon_cmd),
1106 &priv->active_rxon);
1107
1108 /* If the mask clearing failed then we set
1109 * active_rxon back to what it was previously */
1110 if (rc) {
1111 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1112 IWL_ERROR("Error clearing ASSOC_MSK on current "
1113 "configuration (%d).\n", rc);
1114 return rc;
1115 }
1116 }
1117
1118 IWL_DEBUG_INFO("Sending RXON\n"
1119 "* with%s RXON_FILTER_ASSOC_MSK\n"
1120 "* channel = %d\n"
1121 "* bssid = %s\n",
1122 ((priv->staging_rxon.filter_flags &
1123 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1124 le16_to_cpu(priv->staging_rxon.channel),
1125 print_mac(mac, priv->staging_rxon.bssid_addr));
1126
1127 /* Apply the new configuration */
1128 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1129 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1130 if (rc) {
1131 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1132 return rc;
1133 }
1134
1135 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1136
1137 iwl_clear_stations_table(priv);
1138
1139 /* If we issue a new RXON command which required a tune then we must
1140 * send a new TXPOWER command or we won't be able to Tx any frames */
1141 rc = iwl_hw_reg_send_txpower(priv);
1142 if (rc) {
1143 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1144 return rc;
1145 }
1146
1147 /* Add the broadcast address so we can send broadcast frames */
1148 if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
1149 IWL_INVALID_STATION) {
1150 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1151 return -EIO;
1152 }
1153
1154 /* If we have set the ASSOC_MSK and we are in BSS mode then
1155 * add the IWL_AP_ID to the station rate table */
1156 if (iwl_is_associated(priv) &&
1157 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1158 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1159 == IWL_INVALID_STATION) {
1160 IWL_ERROR("Error adding AP address for transmit.\n");
1161 return -EIO;
1162 }
1163
1164 /* Init the hardware's rate fallback order based on the
1165 * phymode */
1166 rc = iwl3945_init_hw_rate_table(priv);
1167 if (rc) {
1168 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1169 return -EIO;
1170 }
1171
1172 return 0;
1173 }
1174
1175 static int iwl_send_bt_config(struct iwl_priv *priv)
1176 {
1177 struct iwl_bt_cmd bt_cmd = {
1178 .flags = 3,
1179 .lead_time = 0xAA,
1180 .max_kill = 1,
1181 .kill_ack_mask = 0,
1182 .kill_cts_mask = 0,
1183 };
1184
1185 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1186 sizeof(struct iwl_bt_cmd), &bt_cmd);
1187 }
1188
1189 static int iwl_send_scan_abort(struct iwl_priv *priv)
1190 {
1191 int rc = 0;
1192 struct iwl_rx_packet *res;
1193 struct iwl_host_cmd cmd = {
1194 .id = REPLY_SCAN_ABORT_CMD,
1195 .meta.flags = CMD_WANT_SKB,
1196 };
1197
1198 /* If there isn't a scan actively going on in the hardware
1199 * then we are in between scan bands and not actually
1200 * actively scanning, so don't send the abort command */
1201 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1202 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1203 return 0;
1204 }
1205
1206 rc = iwl_send_cmd_sync(priv, &cmd);
1207 if (rc) {
1208 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1209 return rc;
1210 }
1211
1212 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1213 if (res->u.status != CAN_ABORT_STATUS) {
1214 /* The scan abort will return 1 for success or
1215 * 2 for "failure". A failure condition can be
1216 * due to simply not being in an active scan which
1217 * can occur if we send the scan abort before we
1218 * the microcode has notified us that a scan is
1219 * completed. */
1220 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1221 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1222 clear_bit(STATUS_SCAN_HW, &priv->status);
1223 }
1224
1225 dev_kfree_skb_any(cmd.meta.u.skb);
1226
1227 return rc;
1228 }
1229
1230 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1231 struct iwl_cmd *cmd,
1232 struct sk_buff *skb)
1233 {
1234 return 1;
1235 }
1236
1237 /*
1238 * CARD_STATE_CMD
1239 *
1240 * Use: Sets the internal card state to enable, disable, or halt
1241 *
1242 * When in the 'enable' state the card operates as normal.
1243 * When in the 'disable' state, the card enters into a low power mode.
1244 * When in the 'halt' state, the card is shut down and must be fully
1245 * restarted to come back on.
1246 */
1247 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1248 {
1249 struct iwl_host_cmd cmd = {
1250 .id = REPLY_CARD_STATE_CMD,
1251 .len = sizeof(u32),
1252 .data = &flags,
1253 .meta.flags = meta_flag,
1254 };
1255
1256 if (meta_flag & CMD_ASYNC)
1257 cmd.meta.u.callback = iwl_card_state_sync_callback;
1258
1259 return iwl_send_cmd(priv, &cmd);
1260 }
1261
1262 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1263 struct iwl_cmd *cmd, struct sk_buff *skb)
1264 {
1265 struct iwl_rx_packet *res = NULL;
1266
1267 if (!skb) {
1268 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1269 return 1;
1270 }
1271
1272 res = (struct iwl_rx_packet *)skb->data;
1273 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1274 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1275 res->hdr.flags);
1276 return 1;
1277 }
1278
1279 switch (res->u.add_sta.status) {
1280 case ADD_STA_SUCCESS_MSK:
1281 break;
1282 default:
1283 break;
1284 }
1285
1286 /* We didn't cache the SKB; let the caller free it */
1287 return 1;
1288 }
1289
1290 int iwl_send_add_station(struct iwl_priv *priv,
1291 struct iwl_addsta_cmd *sta, u8 flags)
1292 {
1293 struct iwl_rx_packet *res = NULL;
1294 int rc = 0;
1295 struct iwl_host_cmd cmd = {
1296 .id = REPLY_ADD_STA,
1297 .len = sizeof(struct iwl_addsta_cmd),
1298 .meta.flags = flags,
1299 .data = sta,
1300 };
1301
1302 if (flags & CMD_ASYNC)
1303 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1304 else
1305 cmd.meta.flags |= CMD_WANT_SKB;
1306
1307 rc = iwl_send_cmd(priv, &cmd);
1308
1309 if (rc || (flags & CMD_ASYNC))
1310 return rc;
1311
1312 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1313 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1314 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1315 res->hdr.flags);
1316 rc = -EIO;
1317 }
1318
1319 if (rc == 0) {
1320 switch (res->u.add_sta.status) {
1321 case ADD_STA_SUCCESS_MSK:
1322 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1323 break;
1324 default:
1325 rc = -EIO;
1326 IWL_WARNING("REPLY_ADD_STA failed\n");
1327 break;
1328 }
1329 }
1330
1331 priv->alloc_rxb_skb--;
1332 dev_kfree_skb_any(cmd.meta.u.skb);
1333
1334 return rc;
1335 }
1336
1337 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1338 struct ieee80211_key_conf *keyconf,
1339 u8 sta_id)
1340 {
1341 unsigned long flags;
1342 __le16 key_flags = 0;
1343
1344 switch (keyconf->alg) {
1345 case ALG_CCMP:
1346 key_flags |= STA_KEY_FLG_CCMP;
1347 key_flags |= cpu_to_le16(
1348 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1349 key_flags &= ~STA_KEY_FLG_INVALID;
1350 break;
1351 case ALG_TKIP:
1352 case ALG_WEP:
1353 return -EINVAL;
1354 default:
1355 return -EINVAL;
1356 }
1357 spin_lock_irqsave(&priv->sta_lock, flags);
1358 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1359 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1360 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1361 keyconf->keylen);
1362
1363 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1364 keyconf->keylen);
1365 priv->stations[sta_id].sta.key.key_flags = key_flags;
1366 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1367 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1368
1369 spin_unlock_irqrestore(&priv->sta_lock, flags);
1370
1371 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1372 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1373 return 0;
1374 }
1375
1376 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1377 {
1378 unsigned long flags;
1379
1380 spin_lock_irqsave(&priv->sta_lock, flags);
1381 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1382 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1383 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1384 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1385 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1386 spin_unlock_irqrestore(&priv->sta_lock, flags);
1387
1388 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1389 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1390 return 0;
1391 }
1392
1393 static void iwl_clear_free_frames(struct iwl_priv *priv)
1394 {
1395 struct list_head *element;
1396
1397 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1398 priv->frames_count);
1399
1400 while (!list_empty(&priv->free_frames)) {
1401 element = priv->free_frames.next;
1402 list_del(element);
1403 kfree(list_entry(element, struct iwl_frame, list));
1404 priv->frames_count--;
1405 }
1406
1407 if (priv->frames_count) {
1408 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1409 priv->frames_count);
1410 priv->frames_count = 0;
1411 }
1412 }
1413
1414 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1415 {
1416 struct iwl_frame *frame;
1417 struct list_head *element;
1418 if (list_empty(&priv->free_frames)) {
1419 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1420 if (!frame) {
1421 IWL_ERROR("Could not allocate frame!\n");
1422 return NULL;
1423 }
1424
1425 priv->frames_count++;
1426 return frame;
1427 }
1428
1429 element = priv->free_frames.next;
1430 list_del(element);
1431 return list_entry(element, struct iwl_frame, list);
1432 }
1433
1434 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1435 {
1436 memset(frame, 0, sizeof(*frame));
1437 list_add(&frame->list, &priv->free_frames);
1438 }
1439
1440 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1441 struct ieee80211_hdr *hdr,
1442 const u8 *dest, int left)
1443 {
1444
1445 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1446 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1447 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1448 return 0;
1449
1450 if (priv->ibss_beacon->len > left)
1451 return 0;
1452
1453 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1454
1455 return priv->ibss_beacon->len;
1456 }
1457
1458 static int iwl_rate_index_from_plcp(int plcp)
1459 {
1460 int i = 0;
1461
1462 for (i = 0; i < IWL_RATE_COUNT; i++)
1463 if (iwl_rates[i].plcp == plcp)
1464 return i;
1465 return -1;
1466 }
1467
1468 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1469 {
1470 u8 i;
1471
1472 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1473 i = iwl_rates[i].next_ieee) {
1474 if (rate_mask & (1 << i))
1475 return iwl_rates[i].plcp;
1476 }
1477
1478 return IWL_RATE_INVALID;
1479 }
1480
1481 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1482 {
1483 struct iwl_frame *frame;
1484 unsigned int frame_size;
1485 int rc;
1486 u8 rate;
1487
1488 frame = iwl_get_free_frame(priv);
1489
1490 if (!frame) {
1491 IWL_ERROR("Could not obtain free frame buffer for beacon "
1492 "command.\n");
1493 return -ENOMEM;
1494 }
1495
1496 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1497 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1498 0xFF0);
1499 if (rate == IWL_INVALID_RATE)
1500 rate = IWL_RATE_6M_PLCP;
1501 } else {
1502 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1503 if (rate == IWL_INVALID_RATE)
1504 rate = IWL_RATE_1M_PLCP;
1505 }
1506
1507 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1508
1509 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1510 &frame->u.cmd[0]);
1511
1512 iwl_free_frame(priv, frame);
1513
1514 return rc;
1515 }
1516
1517 /******************************************************************************
1518 *
1519 * EEPROM related functions
1520 *
1521 ******************************************************************************/
1522
1523 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1524 {
1525 memcpy(mac, priv->eeprom.mac_address, 6);
1526 }
1527
1528 /**
1529 * iwl_eeprom_init - read EEPROM contents
1530 *
1531 * Load the EEPROM from adapter into priv->eeprom
1532 *
1533 * NOTE: This routine uses the non-debug IO access functions.
1534 */
1535 int iwl_eeprom_init(struct iwl_priv *priv)
1536 {
1537 u16 *e = (u16 *)&priv->eeprom;
1538 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1539 u32 r;
1540 int sz = sizeof(priv->eeprom);
1541 int rc;
1542 int i;
1543 u16 addr;
1544
1545 /* The EEPROM structure has several padding buffers within it
1546 * and when adding new EEPROM maps is subject to programmer errors
1547 * which may be very difficult to identify without explicitly
1548 * checking the resulting size of the eeprom map. */
1549 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1550
1551 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1552 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1553 return -ENOENT;
1554 }
1555
1556 rc = iwl_eeprom_aqcuire_semaphore(priv);
1557 if (rc < 0) {
1558 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1559 return -ENOENT;
1560 }
1561
1562 /* eeprom is an array of 16bit values */
1563 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1564 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1565 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1566
1567 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1568 i += IWL_EEPROM_ACCESS_DELAY) {
1569 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1570 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1571 break;
1572 udelay(IWL_EEPROM_ACCESS_DELAY);
1573 }
1574
1575 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1576 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1577 return -ETIMEDOUT;
1578 }
1579 e[addr / 2] = le16_to_cpu(r >> 16);
1580 }
1581
1582 return 0;
1583 }
1584
1585 /******************************************************************************
1586 *
1587 * Misc. internal state and helper functions
1588 *
1589 ******************************************************************************/
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591
1592 /**
1593 * iwl_report_frame - dump frame to syslog during debug sessions
1594 *
1595 * hack this function to show different aspects of received frames,
1596 * including selective frame dumps.
1597 * group100 parameter selects whether to show 1 out of 100 good frames.
1598 *
1599 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1600 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1601 * is 3945-specific and gives bad output for 4965. Need to split the
1602 * functionality, keep common stuff here.
1603 */
1604 void iwl_report_frame(struct iwl_priv *priv,
1605 struct iwl_rx_packet *pkt,
1606 struct ieee80211_hdr *header, int group100)
1607 {
1608 u32 to_us;
1609 u32 print_summary = 0;
1610 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1611 u32 hundred = 0;
1612 u32 dataframe = 0;
1613 u16 fc;
1614 u16 seq_ctl;
1615 u16 channel;
1616 u16 phy_flags;
1617 int rate_sym;
1618 u16 length;
1619 u16 status;
1620 u16 bcn_tmr;
1621 u32 tsf_low;
1622 u64 tsf;
1623 u8 rssi;
1624 u8 agc;
1625 u16 sig_avg;
1626 u16 noise_diff;
1627 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1628 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1629 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1630 u8 *data = IWL_RX_DATA(pkt);
1631
1632 /* MAC header */
1633 fc = le16_to_cpu(header->frame_control);
1634 seq_ctl = le16_to_cpu(header->seq_ctrl);
1635
1636 /* metadata */
1637 channel = le16_to_cpu(rx_hdr->channel);
1638 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1639 rate_sym = rx_hdr->rate;
1640 length = le16_to_cpu(rx_hdr->len);
1641
1642 /* end-of-frame status and timestamp */
1643 status = le32_to_cpu(rx_end->status);
1644 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1645 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1646 tsf = le64_to_cpu(rx_end->timestamp);
1647
1648 /* signal statistics */
1649 rssi = rx_stats->rssi;
1650 agc = rx_stats->agc;
1651 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1652 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1653
1654 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1655
1656 /* if data frame is to us and all is good,
1657 * (optionally) print summary for only 1 out of every 100 */
1658 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1659 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1660 dataframe = 1;
1661 if (!group100)
1662 print_summary = 1; /* print each frame */
1663 else if (priv->framecnt_to_us < 100) {
1664 priv->framecnt_to_us++;
1665 print_summary = 0;
1666 } else {
1667 priv->framecnt_to_us = 0;
1668 print_summary = 1;
1669 hundred = 1;
1670 }
1671 } else {
1672 /* print summary for all other frames */
1673 print_summary = 1;
1674 }
1675
1676 if (print_summary) {
1677 char *title;
1678 u32 rate;
1679
1680 if (hundred)
1681 title = "100Frames";
1682 else if (fc & IEEE80211_FCTL_RETRY)
1683 title = "Retry";
1684 else if (ieee80211_is_assoc_response(fc))
1685 title = "AscRsp";
1686 else if (ieee80211_is_reassoc_response(fc))
1687 title = "RasRsp";
1688 else if (ieee80211_is_probe_response(fc)) {
1689 title = "PrbRsp";
1690 print_dump = 1; /* dump frame contents */
1691 } else if (ieee80211_is_beacon(fc)) {
1692 title = "Beacon";
1693 print_dump = 1; /* dump frame contents */
1694 } else if (ieee80211_is_atim(fc))
1695 title = "ATIM";
1696 else if (ieee80211_is_auth(fc))
1697 title = "Auth";
1698 else if (ieee80211_is_deauth(fc))
1699 title = "DeAuth";
1700 else if (ieee80211_is_disassoc(fc))
1701 title = "DisAssoc";
1702 else
1703 title = "Frame";
1704
1705 rate = iwl_rate_index_from_plcp(rate_sym);
1706 if (rate == -1)
1707 rate = 0;
1708 else
1709 rate = iwl_rates[rate].ieee / 2;
1710
1711 /* print frame summary.
1712 * MAC addresses show just the last byte (for brevity),
1713 * but you can hack it to show more, if you'd like to. */
1714 if (dataframe)
1715 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1716 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1717 title, fc, header->addr1[5],
1718 length, rssi, channel, rate);
1719 else {
1720 /* src/dst addresses assume managed mode */
1721 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1722 "src=0x%02x, rssi=%u, tim=%lu usec, "
1723 "phy=0x%02x, chnl=%d\n",
1724 title, fc, header->addr1[5],
1725 header->addr3[5], rssi,
1726 tsf_low - priv->scan_start_tsf,
1727 phy_flags, channel);
1728 }
1729 }
1730 if (print_dump)
1731 iwl_print_hex_dump(IWL_DL_RX, data, length);
1732 }
1733 #endif
1734
1735 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1736 {
1737 if (priv->hw_setting.shared_virt)
1738 pci_free_consistent(priv->pci_dev,
1739 sizeof(struct iwl_shared),
1740 priv->hw_setting.shared_virt,
1741 priv->hw_setting.shared_phys);
1742 }
1743
1744 /**
1745 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1746 *
1747 * return : set the bit for each supported rate insert in ie
1748 */
1749 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1750 u16 basic_rate, int *left)
1751 {
1752 u16 ret_rates = 0, bit;
1753 int i;
1754 u8 *cnt = ie;
1755 u8 *rates = ie + 1;
1756
1757 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1758 if (bit & supported_rate) {
1759 ret_rates |= bit;
1760 rates[*cnt] = iwl_rates[i].ieee |
1761 ((bit & basic_rate) ? 0x80 : 0x00);
1762 (*cnt)++;
1763 (*left)--;
1764 if ((*left <= 0) ||
1765 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1766 break;
1767 }
1768 }
1769
1770 return ret_rates;
1771 }
1772
1773 /**
1774 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1775 */
1776 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1777 struct ieee80211_mgmt *frame,
1778 int left, int is_direct)
1779 {
1780 int len = 0;
1781 u8 *pos = NULL;
1782 u16 active_rates, ret_rates, cck_rates;
1783
1784 /* Make sure there is enough space for the probe request,
1785 * two mandatory IEs and the data */
1786 left -= 24;
1787 if (left < 0)
1788 return 0;
1789 len += 24;
1790
1791 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1792 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1793 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1794 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1795 frame->seq_ctrl = 0;
1796
1797 /* fill in our indirect SSID IE */
1798 /* ...next IE... */
1799
1800 left -= 2;
1801 if (left < 0)
1802 return 0;
1803 len += 2;
1804 pos = &(frame->u.probe_req.variable[0]);
1805 *pos++ = WLAN_EID_SSID;
1806 *pos++ = 0;
1807
1808 /* fill in our direct SSID IE... */
1809 if (is_direct) {
1810 /* ...next IE... */
1811 left -= 2 + priv->essid_len;
1812 if (left < 0)
1813 return 0;
1814 /* ... fill it in... */
1815 *pos++ = WLAN_EID_SSID;
1816 *pos++ = priv->essid_len;
1817 memcpy(pos, priv->essid, priv->essid_len);
1818 pos += priv->essid_len;
1819 len += 2 + priv->essid_len;
1820 }
1821
1822 /* fill in supported rate */
1823 /* ...next IE... */
1824 left -= 2;
1825 if (left < 0)
1826 return 0;
1827
1828 /* ... fill it in... */
1829 *pos++ = WLAN_EID_SUPP_RATES;
1830 *pos = 0;
1831
1832 priv->active_rate = priv->rates_mask;
1833 active_rates = priv->active_rate;
1834 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1835
1836 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1837 ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1838 priv->active_rate_basic, &left);
1839 active_rates &= ~ret_rates;
1840
1841 ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1842 priv->active_rate_basic, &left);
1843 active_rates &= ~ret_rates;
1844
1845 len += 2 + *pos;
1846 pos += (*pos) + 1;
1847 if (active_rates == 0)
1848 goto fill_end;
1849
1850 /* fill in supported extended rate */
1851 /* ...next IE... */
1852 left -= 2;
1853 if (left < 0)
1854 return 0;
1855 /* ... fill it in... */
1856 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1857 *pos = 0;
1858 iwl_supported_rate_to_ie(pos, active_rates,
1859 priv->active_rate_basic, &left);
1860 if (*pos > 0)
1861 len += 2 + *pos;
1862
1863 fill_end:
1864 return (u16)len;
1865 }
1866
1867 /*
1868 * QoS support
1869 */
1870 #ifdef CONFIG_IWLWIFI_QOS
1871 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1872 struct iwl_qosparam_cmd *qos)
1873 {
1874
1875 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1876 sizeof(struct iwl_qosparam_cmd), qos);
1877 }
1878
1879 static void iwl_reset_qos(struct iwl_priv *priv)
1880 {
1881 u16 cw_min = 15;
1882 u16 cw_max = 1023;
1883 u8 aifs = 2;
1884 u8 is_legacy = 0;
1885 unsigned long flags;
1886 int i;
1887
1888 spin_lock_irqsave(&priv->lock, flags);
1889 priv->qos_data.qos_active = 0;
1890
1891 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1892 if (priv->qos_data.qos_enable)
1893 priv->qos_data.qos_active = 1;
1894 if (!(priv->active_rate & 0xfff0)) {
1895 cw_min = 31;
1896 is_legacy = 1;
1897 }
1898 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1899 if (priv->qos_data.qos_enable)
1900 priv->qos_data.qos_active = 1;
1901 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1902 cw_min = 31;
1903 is_legacy = 1;
1904 }
1905
1906 if (priv->qos_data.qos_active)
1907 aifs = 3;
1908
1909 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1910 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1911 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1912 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1913 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1914
1915 if (priv->qos_data.qos_active) {
1916 i = 1;
1917 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1918 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1919 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1920 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1921 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1922
1923 i = 2;
1924 priv->qos_data.def_qos_parm.ac[i].cw_min =
1925 cpu_to_le16((cw_min + 1) / 2 - 1);
1926 priv->qos_data.def_qos_parm.ac[i].cw_max =
1927 cpu_to_le16(cw_max);
1928 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1929 if (is_legacy)
1930 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1931 cpu_to_le16(6016);
1932 else
1933 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1934 cpu_to_le16(3008);
1935 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1936
1937 i = 3;
1938 priv->qos_data.def_qos_parm.ac[i].cw_min =
1939 cpu_to_le16((cw_min + 1) / 4 - 1);
1940 priv->qos_data.def_qos_parm.ac[i].cw_max =
1941 cpu_to_le16((cw_max + 1) / 2 - 1);
1942 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1943 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1944 if (is_legacy)
1945 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1946 cpu_to_le16(3264);
1947 else
1948 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1949 cpu_to_le16(1504);
1950 } else {
1951 for (i = 1; i < 4; i++) {
1952 priv->qos_data.def_qos_parm.ac[i].cw_min =
1953 cpu_to_le16(cw_min);
1954 priv->qos_data.def_qos_parm.ac[i].cw_max =
1955 cpu_to_le16(cw_max);
1956 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1957 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1958 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1959 }
1960 }
1961 IWL_DEBUG_QOS("set QoS to default \n");
1962
1963 spin_unlock_irqrestore(&priv->lock, flags);
1964 }
1965
1966 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1967 {
1968 unsigned long flags;
1969
1970 if (priv == NULL)
1971 return;
1972
1973 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1974 return;
1975
1976 if (!priv->qos_data.qos_enable)
1977 return;
1978
1979 spin_lock_irqsave(&priv->lock, flags);
1980 priv->qos_data.def_qos_parm.qos_flags = 0;
1981
1982 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1983 !priv->qos_data.qos_cap.q_AP.txop_request)
1984 priv->qos_data.def_qos_parm.qos_flags |=
1985 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1986
1987 if (priv->qos_data.qos_active)
1988 priv->qos_data.def_qos_parm.qos_flags |=
1989 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1990
1991 spin_unlock_irqrestore(&priv->lock, flags);
1992
1993 if (force || iwl_is_associated(priv)) {
1994 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1995 priv->qos_data.qos_active);
1996
1997 iwl_send_qos_params_command(priv,
1998 &(priv->qos_data.def_qos_parm));
1999 }
2000 }
2001
2002 #endif /* CONFIG_IWLWIFI_QOS */
2003 /*
2004 * Power management (not Tx power!) functions
2005 */
2006 #define MSEC_TO_USEC 1024
2007
2008 #define NOSLP __constant_cpu_to_le32(0)
2009 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2010 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2011 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2012 __constant_cpu_to_le32(X1), \
2013 __constant_cpu_to_le32(X2), \
2014 __constant_cpu_to_le32(X3), \
2015 __constant_cpu_to_le32(X4)}
2016
2017
2018 /* default power management (not Tx power) table values */
2019 /* for tim 0-10 */
2020 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2021 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2022 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2023 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2024 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2025 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2026 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2027 };
2028
2029 /* for tim > 10 */
2030 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2031 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2032 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2033 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2034 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2035 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2036 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2037 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2038 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2039 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2040 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2041 };
2042
2043 int iwl_power_init_handle(struct iwl_priv *priv)
2044 {
2045 int rc = 0, i;
2046 struct iwl_power_mgr *pow_data;
2047 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2048 u16 pci_pm;
2049
2050 IWL_DEBUG_POWER("Initialize power \n");
2051
2052 pow_data = &(priv->power_data);
2053
2054 memset(pow_data, 0, sizeof(*pow_data));
2055
2056 pow_data->active_index = IWL_POWER_RANGE_0;
2057 pow_data->dtim_val = 0xffff;
2058
2059 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2060 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2061
2062 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2063 if (rc != 0)
2064 return 0;
2065 else {
2066 struct iwl_powertable_cmd *cmd;
2067
2068 IWL_DEBUG_POWER("adjust power command flags\n");
2069
2070 for (i = 0; i < IWL_POWER_AC; i++) {
2071 cmd = &pow_data->pwr_range_0[i].cmd;
2072
2073 if (pci_pm & 0x1)
2074 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2075 else
2076 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2077 }
2078 }
2079 return rc;
2080 }
2081
2082 static int iwl_update_power_cmd(struct iwl_priv *priv,
2083 struct iwl_powertable_cmd *cmd, u32 mode)
2084 {
2085 int rc = 0, i;
2086 u8 skip;
2087 u32 max_sleep = 0;
2088 struct iwl_power_vec_entry *range;
2089 u8 period = 0;
2090 struct iwl_power_mgr *pow_data;
2091
2092 if (mode > IWL_POWER_INDEX_5) {
2093 IWL_DEBUG_POWER("Error invalid power mode \n");
2094 return -1;
2095 }
2096 pow_data = &(priv->power_data);
2097
2098 if (pow_data->active_index == IWL_POWER_RANGE_0)
2099 range = &pow_data->pwr_range_0[0];
2100 else
2101 range = &pow_data->pwr_range_1[1];
2102
2103 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2104
2105 #ifdef IWL_MAC80211_DISABLE
2106 if (priv->assoc_network != NULL) {
2107 unsigned long flags;
2108
2109 period = priv->assoc_network->tim.tim_period;
2110 }
2111 #endif /*IWL_MAC80211_DISABLE */
2112 skip = range[mode].no_dtim;
2113
2114 if (period == 0) {
2115 period = 1;
2116 skip = 0;
2117 }
2118
2119 if (skip == 0) {
2120 max_sleep = period;
2121 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2122 } else {
2123 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2124 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2125 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2126 }
2127
2128 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2129 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2130 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2131 }
2132
2133 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2134 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2135 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2136 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2137 le32_to_cpu(cmd->sleep_interval[0]),
2138 le32_to_cpu(cmd->sleep_interval[1]),
2139 le32_to_cpu(cmd->sleep_interval[2]),
2140 le32_to_cpu(cmd->sleep_interval[3]),
2141 le32_to_cpu(cmd->sleep_interval[4]));
2142
2143 return rc;
2144 }
2145
2146 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2147 {
2148 u32 final_mode = mode;
2149 int rc;
2150 struct iwl_powertable_cmd cmd;
2151
2152 /* If on battery, set to 3,
2153 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2154 * else user level */
2155 switch (mode) {
2156 case IWL_POWER_BATTERY:
2157 final_mode = IWL_POWER_INDEX_3;
2158 break;
2159 case IWL_POWER_AC:
2160 final_mode = IWL_POWER_MODE_CAM;
2161 break;
2162 default:
2163 final_mode = mode;
2164 break;
2165 }
2166
2167 iwl_update_power_cmd(priv, &cmd, final_mode);
2168
2169 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2170
2171 if (final_mode == IWL_POWER_MODE_CAM)
2172 clear_bit(STATUS_POWER_PMI, &priv->status);
2173 else
2174 set_bit(STATUS_POWER_PMI, &priv->status);
2175
2176 return rc;
2177 }
2178
2179 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2180 {
2181 /* Filter incoming packets to determine if they are targeted toward
2182 * this network, discarding packets coming from ourselves */
2183 switch (priv->iw_mode) {
2184 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2185 /* packets from our adapter are dropped (echo) */
2186 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2187 return 0;
2188 /* {broad,multi}cast packets to our IBSS go through */
2189 if (is_multicast_ether_addr(header->addr1))
2190 return !compare_ether_addr(header->addr3, priv->bssid);
2191 /* packets to our adapter go through */
2192 return !compare_ether_addr(header->addr1, priv->mac_addr);
2193 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2194 /* packets from our adapter are dropped (echo) */
2195 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2196 return 0;
2197 /* {broad,multi}cast packets to our BSS go through */
2198 if (is_multicast_ether_addr(header->addr1))
2199 return !compare_ether_addr(header->addr2, priv->bssid);
2200 /* packets to our adapter go through */
2201 return !compare_ether_addr(header->addr1, priv->mac_addr);
2202 }
2203
2204 return 1;
2205 }
2206
2207 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2208
2209 const char *iwl_get_tx_fail_reason(u32 status)
2210 {
2211 switch (status & TX_STATUS_MSK) {
2212 case TX_STATUS_SUCCESS:
2213 return "SUCCESS";
2214 TX_STATUS_ENTRY(SHORT_LIMIT);
2215 TX_STATUS_ENTRY(LONG_LIMIT);
2216 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2217 TX_STATUS_ENTRY(MGMNT_ABORT);
2218 TX_STATUS_ENTRY(NEXT_FRAG);
2219 TX_STATUS_ENTRY(LIFE_EXPIRE);
2220 TX_STATUS_ENTRY(DEST_PS);
2221 TX_STATUS_ENTRY(ABORTED);
2222 TX_STATUS_ENTRY(BT_RETRY);
2223 TX_STATUS_ENTRY(STA_INVALID);
2224 TX_STATUS_ENTRY(FRAG_DROPPED);
2225 TX_STATUS_ENTRY(TID_DISABLE);
2226 TX_STATUS_ENTRY(FRAME_FLUSHED);
2227 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2228 TX_STATUS_ENTRY(TX_LOCKED);
2229 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2230 }
2231
2232 return "UNKNOWN";
2233 }
2234
2235 /**
2236 * iwl_scan_cancel - Cancel any currently executing HW scan
2237 *
2238 * NOTE: priv->mutex is not required before calling this function
2239 */
2240 static int iwl_scan_cancel(struct iwl_priv *priv)
2241 {
2242 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2243 clear_bit(STATUS_SCANNING, &priv->status);
2244 return 0;
2245 }
2246
2247 if (test_bit(STATUS_SCANNING, &priv->status)) {
2248 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2249 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2250 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2251 queue_work(priv->workqueue, &priv->abort_scan);
2252
2253 } else
2254 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2255
2256 return test_bit(STATUS_SCANNING, &priv->status);
2257 }
2258
2259 return 0;
2260 }
2261
2262 /**
2263 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2264 * @ms: amount of time to wait (in milliseconds) for scan to abort
2265 *
2266 * NOTE: priv->mutex must be held before calling this function
2267 */
2268 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2269 {
2270 unsigned long now = jiffies;
2271 int ret;
2272
2273 ret = iwl_scan_cancel(priv);
2274 if (ret && ms) {
2275 mutex_unlock(&priv->mutex);
2276 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2277 test_bit(STATUS_SCANNING, &priv->status))
2278 msleep(1);
2279 mutex_lock(&priv->mutex);
2280
2281 return test_bit(STATUS_SCANNING, &priv->status);
2282 }
2283
2284 return ret;
2285 }
2286
2287 static void iwl_sequence_reset(struct iwl_priv *priv)
2288 {
2289 /* Reset ieee stats */
2290
2291 /* We don't reset the net_device_stats (ieee->stats) on
2292 * re-association */
2293
2294 priv->last_seq_num = -1;
2295 priv->last_frag_num = -1;
2296 priv->last_packet_time = 0;
2297
2298 iwl_scan_cancel(priv);
2299 }
2300
2301 #define MAX_UCODE_BEACON_INTERVAL 1024
2302 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2303
2304 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2305 {
2306 u16 new_val = 0;
2307 u16 beacon_factor = 0;
2308
2309 beacon_factor =
2310 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2311 / MAX_UCODE_BEACON_INTERVAL;
2312 new_val = beacon_val / beacon_factor;
2313
2314 return cpu_to_le16(new_val);
2315 }
2316
2317 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2318 {
2319 u64 interval_tm_unit;
2320 u64 tsf, result;
2321 unsigned long flags;
2322 struct ieee80211_conf *conf = NULL;
2323 u16 beacon_int = 0;
2324
2325 conf = ieee80211_get_hw_conf(priv->hw);
2326
2327 spin_lock_irqsave(&priv->lock, flags);
2328 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2329 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2330
2331 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2332
2333 tsf = priv->timestamp1;
2334 tsf = ((tsf << 32) | priv->timestamp0);
2335
2336 beacon_int = priv->beacon_int;
2337 spin_unlock_irqrestore(&priv->lock, flags);
2338
2339 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2340 if (beacon_int == 0) {
2341 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2342 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2343 } else {
2344 priv->rxon_timing.beacon_interval =
2345 cpu_to_le16(beacon_int);
2346 priv->rxon_timing.beacon_interval =
2347 iwl_adjust_beacon_interval(
2348 le16_to_cpu(priv->rxon_timing.beacon_interval));
2349 }
2350
2351 priv->rxon_timing.atim_window = 0;
2352 } else {
2353 priv->rxon_timing.beacon_interval =
2354 iwl_adjust_beacon_interval(conf->beacon_int);
2355 /* TODO: we need to get atim_window from upper stack
2356 * for now we set to 0 */
2357 priv->rxon_timing.atim_window = 0;
2358 }
2359
2360 interval_tm_unit =
2361 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2362 result = do_div(tsf, interval_tm_unit);
2363 priv->rxon_timing.beacon_init_val =
2364 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2365
2366 IWL_DEBUG_ASSOC
2367 ("beacon interval %d beacon timer %d beacon tim %d\n",
2368 le16_to_cpu(priv->rxon_timing.beacon_interval),
2369 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2370 le16_to_cpu(priv->rxon_timing.atim_window));
2371 }
2372
2373 static int iwl_scan_initiate(struct iwl_priv *priv)
2374 {
2375 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2376 IWL_ERROR("APs don't scan.\n");
2377 return 0;
2378 }
2379
2380 if (!iwl_is_ready_rf(priv)) {
2381 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2382 return -EIO;
2383 }
2384
2385 if (test_bit(STATUS_SCANNING, &priv->status)) {
2386 IWL_DEBUG_SCAN("Scan already in progress.\n");
2387 return -EAGAIN;
2388 }
2389
2390 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2391 IWL_DEBUG_SCAN("Scan request while abort pending. "
2392 "Queuing.\n");
2393 return -EAGAIN;
2394 }
2395
2396 IWL_DEBUG_INFO("Starting scan...\n");
2397 priv->scan_bands = 2;
2398 set_bit(STATUS_SCANNING, &priv->status);
2399 priv->scan_start = jiffies;
2400 priv->scan_pass_start = priv->scan_start;
2401
2402 queue_work(priv->workqueue, &priv->request_scan);
2403
2404 return 0;
2405 }
2406
2407 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2408 {
2409 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2410
2411 if (hw_decrypt)
2412 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2413 else
2414 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2415
2416 return 0;
2417 }
2418
2419 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2420 {
2421 if (phymode == MODE_IEEE80211A) {
2422 priv->staging_rxon.flags &=
2423 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2424 | RXON_FLG_CCK_MSK);
2425 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2426 } else {
2427 /* Copied from iwl_bg_post_associate() */
2428 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2429 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2430 else
2431 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2432
2433 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2434 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2435
2436 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2437 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2438 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2439 }
2440 }
2441
2442 /*
2443 * initilize rxon structure with default values fromm eeprom
2444 */
2445 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2446 {
2447 const struct iwl_channel_info *ch_info;
2448
2449 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2450
2451 switch (priv->iw_mode) {
2452 case IEEE80211_IF_TYPE_AP:
2453 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2454 break;
2455
2456 case IEEE80211_IF_TYPE_STA:
2457 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2458 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2459 break;
2460
2461 case IEEE80211_IF_TYPE_IBSS:
2462 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2463 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2464 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2465 RXON_FILTER_ACCEPT_GRP_MSK;
2466 break;
2467
2468 case IEEE80211_IF_TYPE_MNTR:
2469 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2470 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2471 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2472 break;
2473 }
2474
2475 #if 0
2476 /* TODO: Figure out when short_preamble would be set and cache from
2477 * that */
2478 if (!hw_to_local(priv->hw)->short_preamble)
2479 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2480 else
2481 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2482 #endif
2483
2484 ch_info = iwl_get_channel_info(priv, priv->phymode,
2485 le16_to_cpu(priv->staging_rxon.channel));
2486
2487 if (!ch_info)
2488 ch_info = &priv->channel_info[0];
2489
2490 /*
2491 * in some case A channels are all non IBSS
2492 * in this case force B/G channel
2493 */
2494 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2495 !(is_channel_ibss(ch_info)))
2496 ch_info = &priv->channel_info[0];
2497
2498 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2499 if (is_channel_a_band(ch_info))
2500 priv->phymode = MODE_IEEE80211A;
2501 else
2502 priv->phymode = MODE_IEEE80211G;
2503
2504 iwl_set_flags_for_phymode(priv, priv->phymode);
2505
2506 priv->staging_rxon.ofdm_basic_rates =
2507 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2508 priv->staging_rxon.cck_basic_rates =
2509 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2510 }
2511
2512 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2513 {
2514 if (!iwl_is_ready_rf(priv))
2515 return -EAGAIN;
2516
2517 if (mode == IEEE80211_IF_TYPE_IBSS) {
2518 const struct iwl_channel_info *ch_info;
2519
2520 ch_info = iwl_get_channel_info(priv,
2521 priv->phymode,
2522 le16_to_cpu(priv->staging_rxon.channel));
2523
2524 if (!ch_info || !is_channel_ibss(ch_info)) {
2525 IWL_ERROR("channel %d not IBSS channel\n",
2526 le16_to_cpu(priv->staging_rxon.channel));
2527 return -EINVAL;
2528 }
2529 }
2530
2531 cancel_delayed_work(&priv->scan_check);
2532 if (iwl_scan_cancel_timeout(priv, 100)) {
2533 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2534 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2535 return -EAGAIN;
2536 }
2537
2538 priv->iw_mode = mode;
2539
2540 iwl_connection_init_rx_config(priv);
2541 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2542
2543 iwl_clear_stations_table(priv);
2544
2545 iwl_commit_rxon(priv);
2546
2547 return 0;
2548 }
2549
2550 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2551 struct ieee80211_tx_control *ctl,
2552 struct iwl_cmd *cmd,
2553 struct sk_buff *skb_frag,
2554 int last_frag)
2555 {
2556 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2557
2558 switch (keyinfo->alg) {
2559 case ALG_CCMP:
2560 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2561 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2562 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2563 break;
2564
2565 case ALG_TKIP:
2566 #if 0
2567 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2568
2569 if (last_frag)
2570 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2571 8);
2572 else
2573 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2574 #endif
2575 break;
2576
2577 case ALG_WEP:
2578 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2579 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2580
2581 if (keyinfo->keylen == 13)
2582 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2583
2584 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2585
2586 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2587 "with key %d\n", ctl->key_idx);
2588 break;
2589
2590 default:
2591 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2592 break;
2593 }
2594 }
2595
2596 /*
2597 * handle build REPLY_TX command notification.
2598 */
2599 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2600 struct iwl_cmd *cmd,
2601 struct ieee80211_tx_control *ctrl,
2602 struct ieee80211_hdr *hdr,
2603 int is_unicast, u8 std_id)
2604 {
2605 __le16 *qc;
2606 u16 fc = le16_to_cpu(hdr->frame_control);
2607 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2608
2609 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2610 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2611 tx_flags |= TX_CMD_FLG_ACK_MSK;
2612 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2613 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2614 if (ieee80211_is_probe_response(fc) &&
2615 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2616 tx_flags |= TX_CMD_FLG_TSF_MSK;
2617 } else {
2618 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2619 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2620 }
2621
2622 cmd->cmd.tx.sta_id = std_id;
2623 if (ieee80211_get_morefrag(hdr))
2624 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2625
2626 qc = ieee80211_get_qos_ctrl(hdr);
2627 if (qc) {
2628 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2629 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2630 } else
2631 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2632
2633 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2634 tx_flags |= TX_CMD_FLG_RTS_MSK;
2635 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2636 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2637 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2638 tx_flags |= TX_CMD_FLG_CTS_MSK;
2639 }
2640
2641 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2642 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2643
2644 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2645 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2646 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2647 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2648 cmd->cmd.tx.timeout.pm_frame_timeout =
2649 cpu_to_le16(3);
2650 else
2651 cmd->cmd.tx.timeout.pm_frame_timeout =
2652 cpu_to_le16(2);
2653 } else
2654 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2655
2656 cmd->cmd.tx.driver_txop = 0;
2657 cmd->cmd.tx.tx_flags = tx_flags;
2658 cmd->cmd.tx.next_frame_len = 0;
2659 }
2660
2661 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2662 {
2663 int sta_id;
2664 u16 fc = le16_to_cpu(hdr->frame_control);
2665
2666 /* If this frame is broadcast or not data then use the broadcast
2667 * station id */
2668 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2669 is_multicast_ether_addr(hdr->addr1))
2670 return priv->hw_setting.bcast_sta_id;
2671
2672 switch (priv->iw_mode) {
2673
2674 /* If this frame is part of a BSS network (we're a station), then
2675 * we use the AP's station id */
2676 case IEEE80211_IF_TYPE_STA:
2677 return IWL_AP_ID;
2678
2679 /* If we are an AP, then find the station, or use BCAST */
2680 case IEEE80211_IF_TYPE_AP:
2681 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2682 if (sta_id != IWL_INVALID_STATION)
2683 return sta_id;
2684 return priv->hw_setting.bcast_sta_id;
2685
2686 /* If this frame is part of a IBSS network, then we use the
2687 * target specific station id */
2688 case IEEE80211_IF_TYPE_IBSS: {
2689 DECLARE_MAC_BUF(mac);
2690
2691 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2692 if (sta_id != IWL_INVALID_STATION)
2693 return sta_id;
2694
2695 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2696
2697 if (sta_id != IWL_INVALID_STATION)
2698 return sta_id;
2699
2700 IWL_DEBUG_DROP("Station %s not in station map. "
2701 "Defaulting to broadcast...\n",
2702 print_mac(mac, hdr->addr1));
2703 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2704 return priv->hw_setting.bcast_sta_id;
2705 }
2706 default:
2707 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2708 return priv->hw_setting.bcast_sta_id;
2709 }
2710 }
2711
2712 /*
2713 * start REPLY_TX command process
2714 */
2715 static int iwl_tx_skb(struct iwl_priv *priv,
2716 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2717 {
2718 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2719 struct iwl_tfd_frame *tfd;
2720 u32 *control_flags;
2721 int txq_id = ctl->queue;
2722 struct iwl_tx_queue *txq = NULL;
2723 struct iwl_queue *q = NULL;
2724 dma_addr_t phys_addr;
2725 dma_addr_t txcmd_phys;
2726 struct iwl_cmd *out_cmd = NULL;
2727 u16 len, idx, len_org;
2728 u8 id, hdr_len, unicast;
2729 u8 sta_id;
2730 u16 seq_number = 0;
2731 u16 fc;
2732 __le16 *qc;
2733 u8 wait_write_ptr = 0;
2734 unsigned long flags;
2735 int rc;
2736
2737 spin_lock_irqsave(&priv->lock, flags);
2738 if (iwl_is_rfkill(priv)) {
2739 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2740 goto drop_unlock;
2741 }
2742
2743 if (!priv->interface_id) {
2744 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2745 goto drop_unlock;
2746 }
2747
2748 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2749 IWL_ERROR("ERROR: No TX rate available.\n");
2750 goto drop_unlock;
2751 }
2752
2753 unicast = !is_multicast_ether_addr(hdr->addr1);
2754 id = 0;
2755
2756 fc = le16_to_cpu(hdr->frame_control);
2757
2758 #ifdef CONFIG_IWLWIFI_DEBUG
2759 if (ieee80211_is_auth(fc))
2760 IWL_DEBUG_TX("Sending AUTH frame\n");
2761 else if (ieee80211_is_assoc_request(fc))
2762 IWL_DEBUG_TX("Sending ASSOC frame\n");
2763 else if (ieee80211_is_reassoc_request(fc))
2764 IWL_DEBUG_TX("Sending REASSOC frame\n");
2765 #endif
2766
2767 if (!iwl_is_associated(priv) &&
2768 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2769 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2770 goto drop_unlock;
2771 }
2772
2773 spin_unlock_irqrestore(&priv->lock, flags);
2774
2775 hdr_len = ieee80211_get_hdrlen(fc);
2776 sta_id = iwl_get_sta_id(priv, hdr);
2777 if (sta_id == IWL_INVALID_STATION) {
2778 DECLARE_MAC_BUF(mac);
2779
2780 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2781 print_mac(mac, hdr->addr1));
2782 goto drop;
2783 }
2784
2785 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2786
2787 qc = ieee80211_get_qos_ctrl(hdr);
2788 if (qc) {
2789 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2790 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2791 IEEE80211_SCTL_SEQ;
2792 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2793 (hdr->seq_ctrl &
2794 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2795 seq_number += 0x10;
2796 }
2797 txq = &priv->txq[txq_id];
2798 q = &txq->q;
2799
2800 spin_lock_irqsave(&priv->lock, flags);
2801
2802 tfd = &txq->bd[q->first_empty];
2803 memset(tfd, 0, sizeof(*tfd));
2804 control_flags = (u32 *) tfd;
2805 idx = get_cmd_index(q, q->first_empty, 0);
2806
2807 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2808 txq->txb[q->first_empty].skb[0] = skb;
2809 memcpy(&(txq->txb[q->first_empty].status.control),
2810 ctl, sizeof(struct ieee80211_tx_control));
2811 out_cmd = &txq->cmd[idx];
2812 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2813 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2814 out_cmd->hdr.cmd = REPLY_TX;
2815 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2816 INDEX_TO_SEQ(q->first_empty)));
2817 /* copy frags header */
2818 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2819
2820 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2821 len = priv->hw_setting.tx_cmd_len +
2822 sizeof(struct iwl_cmd_header) + hdr_len;
2823
2824 len_org = len;
2825 len = (len + 3) & ~3;
2826
2827 if (len_org != len)
2828 len_org = 1;
2829 else
2830 len_org = 0;
2831
2832 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2833 offsetof(struct iwl_cmd, hdr);
2834
2835 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2836
2837 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2838 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2839
2840 /* 802.11 null functions have no payload... */
2841 len = skb->len - hdr_len;
2842 if (len) {
2843 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2844 len, PCI_DMA_TODEVICE);
2845 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2846 }
2847
2848 /* If there is no payload, then only one TFD is used */
2849 if (!len)
2850 *control_flags = TFD_CTL_COUNT_SET(1);
2851 else
2852 *control_flags = TFD_CTL_COUNT_SET(2) |
2853 TFD_CTL_PAD_SET(U32_PAD(len));
2854
2855 len = (u16)skb->len;
2856 out_cmd->cmd.tx.len = cpu_to_le16(len);
2857
2858 /* TODO need this for burst mode later on */
2859 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2860
2861 /* set is_hcca to 0; it probably will never be implemented */
2862 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2863
2864 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2865 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2866
2867 if (!ieee80211_get_morefrag(hdr)) {
2868 txq->need_update = 1;
2869 if (qc) {
2870 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2871 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2872 }
2873 } else {
2874 wait_write_ptr = 1;
2875 txq->need_update = 0;
2876 }
2877
2878 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2879 sizeof(out_cmd->cmd.tx));
2880
2881 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2882 ieee80211_get_hdrlen(fc));
2883
2884 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2885 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2886 spin_unlock_irqrestore(&priv->lock, flags);
2887
2888 if (rc)
2889 return rc;
2890
2891 if ((iwl_queue_space(q) < q->high_mark)
2892 && priv->mac80211_registered) {
2893 if (wait_write_ptr) {
2894 spin_lock_irqsave(&priv->lock, flags);
2895 txq->need_update = 1;
2896 iwl_tx_queue_update_write_ptr(priv, txq);
2897 spin_unlock_irqrestore(&priv->lock, flags);
2898 }
2899
2900 ieee80211_stop_queue(priv->hw, ctl->queue);
2901 }
2902
2903 return 0;
2904
2905 drop_unlock:
2906 spin_unlock_irqrestore(&priv->lock, flags);
2907 drop:
2908 return -1;
2909 }
2910
2911 static void iwl_set_rate(struct iwl_priv *priv)
2912 {
2913 const struct ieee80211_hw_mode *hw = NULL;
2914 struct ieee80211_rate *rate;
2915 int i;
2916
2917 hw = iwl_get_hw_mode(priv, priv->phymode);
2918 if (!hw) {
2919 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2920 return;
2921 }
2922
2923 priv->active_rate = 0;
2924 priv->active_rate_basic = 0;
2925
2926 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2927 hw->mode == MODE_IEEE80211A ?
2928 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2929
2930 for (i = 0; i < hw->num_rates; i++) {
2931 rate = &(hw->rates[i]);
2932 if ((rate->val < IWL_RATE_COUNT) &&
2933 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2934 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2935 rate->val, iwl_rates[rate->val].plcp,
2936 (rate->flags & IEEE80211_RATE_BASIC) ?
2937 "*" : "");
2938 priv->active_rate |= (1 << rate->val);
2939 if (rate->flags & IEEE80211_RATE_BASIC)
2940 priv->active_rate_basic |= (1 << rate->val);
2941 } else
2942 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2943 rate->val, iwl_rates[rate->val].plcp);
2944 }
2945
2946 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2947 priv->active_rate, priv->active_rate_basic);
2948
2949 /*
2950 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2951 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2952 * OFDM
2953 */
2954 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2955 priv->staging_rxon.cck_basic_rates =
2956 ((priv->active_rate_basic &
2957 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2958 else
2959 priv->staging_rxon.cck_basic_rates =
2960 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2961
2962 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2963 priv->staging_rxon.ofdm_basic_rates =
2964 ((priv->active_rate_basic &
2965 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2966 IWL_FIRST_OFDM_RATE) & 0xFF;
2967 else
2968 priv->staging_rxon.ofdm_basic_rates =
2969 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2970 }
2971
2972 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2973 {
2974 unsigned long flags;
2975
2976 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2977 return;
2978
2979 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2980 disable_radio ? "OFF" : "ON");
2981
2982 if (disable_radio) {
2983 iwl_scan_cancel(priv);
2984 /* FIXME: This is a workaround for AP */
2985 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2986 spin_lock_irqsave(&priv->lock, flags);
2987 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2988 CSR_UCODE_SW_BIT_RFKILL);
2989 spin_unlock_irqrestore(&priv->lock, flags);
2990 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2991 set_bit(STATUS_RF_KILL_SW, &priv->status);
2992 }
2993 return;
2994 }
2995
2996 spin_lock_irqsave(&priv->lock, flags);
2997 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2998
2999 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3000 spin_unlock_irqrestore(&priv->lock, flags);
3001
3002 /* wake up ucode */
3003 msleep(10);
3004
3005 spin_lock_irqsave(&priv->lock, flags);
3006 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3007 if (!iwl_grab_restricted_access(priv))
3008 iwl_release_restricted_access(priv);
3009 spin_unlock_irqrestore(&priv->lock, flags);
3010
3011 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3012 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3013 "disabled by HW switch\n");
3014 return;
3015 }
3016
3017 queue_work(priv->workqueue, &priv->restart);
3018 return;
3019 }
3020
3021 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3022 u32 decrypt_res, struct ieee80211_rx_status *stats)
3023 {
3024 u16 fc =
3025 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3026
3027 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3028 return;
3029
3030 if (!(fc & IEEE80211_FCTL_PROTECTED))
3031 return;
3032
3033 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3034 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3035 case RX_RES_STATUS_SEC_TYPE_TKIP:
3036 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3037 RX_RES_STATUS_BAD_ICV_MIC)
3038 stats->flag |= RX_FLAG_MMIC_ERROR;
3039 case RX_RES_STATUS_SEC_TYPE_WEP:
3040 case RX_RES_STATUS_SEC_TYPE_CCMP:
3041 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3042 RX_RES_STATUS_DECRYPT_OK) {
3043 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3044 stats->flag |= RX_FLAG_DECRYPTED;
3045 }
3046 break;
3047
3048 default:
3049 break;
3050 }
3051 }
3052
3053 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3054 struct iwl_rx_mem_buffer *rxb,
3055 void *data, short len,
3056 struct ieee80211_rx_status *stats,
3057 u16 phy_flags)
3058 {
3059 struct iwl_rt_rx_hdr *iwl_rt;
3060
3061 /* First cache any information we need before we overwrite
3062 * the information provided in the skb from the hardware */
3063 s8 signal = stats->ssi;
3064 s8 noise = 0;
3065 int rate = stats->rate;
3066 u64 tsf = stats->mactime;
3067 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3068
3069 /* We received data from the HW, so stop the watchdog */
3070 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3071 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3072 return;
3073 }
3074
3075 /* copy the frame data to write after where the radiotap header goes */
3076 iwl_rt = (void *)rxb->skb->data;
3077 memmove(iwl_rt->payload, data, len);
3078
3079 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3080 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3081
3082 /* total header + data */
3083 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3084
3085 /* Set the size of the skb to the size of the frame */
3086 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3087
3088 /* Big bitfield of all the fields we provide in radiotap */
3089 iwl_rt->rt_hdr.it_present =
3090 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3091 (1 << IEEE80211_RADIOTAP_FLAGS) |
3092 (1 << IEEE80211_RADIOTAP_RATE) |
3093 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3094 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3095 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3096 (1 << IEEE80211_RADIOTAP_ANTENNA));
3097
3098 /* Zero the flags, we'll add to them as we go */
3099 iwl_rt->rt_flags = 0;
3100
3101 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3102
3103 /* Convert to dBm */
3104 iwl_rt->rt_dbmsignal = signal;
3105 iwl_rt->rt_dbmnoise = noise;
3106
3107 /* Convert the channel frequency and set the flags */
3108 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3109 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3110 iwl_rt->rt_chbitmask =
3111 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3112 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3113 iwl_rt->rt_chbitmask =
3114 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3115 else /* 802.11g */
3116 iwl_rt->rt_chbitmask =
3117 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3118
3119 rate = iwl_rate_index_from_plcp(rate);
3120 if (rate == -1)
3121 iwl_rt->rt_rate = 0;
3122 else
3123 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3124
3125 /* antenna number */
3126 iwl_rt->rt_antenna =
3127 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3128
3129 /* set the preamble flag if we have it */
3130 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3131 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3132
3133 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3134
3135 stats->flag |= RX_FLAG_RADIOTAP;
3136 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3137 rxb->skb = NULL;
3138 }
3139
3140
3141 #define IWL_PACKET_RETRY_TIME HZ
3142
3143 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3144 {
3145 u16 sc = le16_to_cpu(header->seq_ctrl);
3146 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3147 u16 frag = sc & IEEE80211_SCTL_FRAG;
3148 u16 *last_seq, *last_frag;
3149 unsigned long *last_time;
3150
3151 switch (priv->iw_mode) {
3152 case IEEE80211_IF_TYPE_IBSS:{
3153 struct list_head *p;
3154 struct iwl_ibss_seq *entry = NULL;
3155 u8 *mac = header->addr2;
3156 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3157
3158 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3159 entry =
3160 list_entry(p, struct iwl_ibss_seq, list);
3161 if (!compare_ether_addr(entry->mac, mac))
3162 break;
3163 }
3164 if (p == &priv->ibss_mac_hash[index]) {
3165 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3166 if (!entry) {
3167 IWL_ERROR
3168 ("Cannot malloc new mac entry\n");
3169 return 0;
3170 }
3171 memcpy(entry->mac, mac, ETH_ALEN);
3172 entry->seq_num = seq;
3173 entry->frag_num = frag;
3174 entry->packet_time = jiffies;
3175 list_add(&entry->list,
3176 &priv->ibss_mac_hash[index]);
3177 return 0;
3178 }
3179 last_seq = &entry->seq_num;
3180 last_frag = &entry->frag_num;
3181 last_time = &entry->packet_time;
3182 break;
3183 }
3184 case IEEE80211_IF_TYPE_STA:
3185 last_seq = &priv->last_seq_num;
3186 last_frag = &priv->last_frag_num;
3187 last_time = &priv->last_packet_time;
3188 break;
3189 default:
3190 return 0;
3191 }
3192 if ((*last_seq == seq) &&
3193 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3194 if (*last_frag == frag)
3195 goto drop;
3196 if (*last_frag + 1 != frag)
3197 /* out-of-order fragment */
3198 goto drop;
3199 } else
3200 *last_seq = seq;
3201
3202 *last_frag = frag;
3203 *last_time = jiffies;
3204 return 0;
3205
3206 drop:
3207 return 1;
3208 }
3209
3210 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3211
3212 #include "iwl-spectrum.h"
3213
3214 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3215 #define BEACON_TIME_MASK_HIGH 0xFF000000
3216 #define TIME_UNIT 1024
3217
3218 /*
3219 * extended beacon time format
3220 * time in usec will be changed into a 32-bit value in 8:24 format
3221 * the high 1 byte is the beacon counts
3222 * the lower 3 bytes is the time in usec within one beacon interval
3223 */
3224
3225 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3226 {
3227 u32 quot;
3228 u32 rem;
3229 u32 interval = beacon_interval * 1024;
3230
3231 if (!interval || !usec)
3232 return 0;
3233
3234 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3235 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3236
3237 return (quot << 24) + rem;
3238 }
3239
3240 /* base is usually what we get from ucode with each received frame,
3241 * the same as HW timer counter counting down
3242 */
3243
3244 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3245 {
3246 u32 base_low = base & BEACON_TIME_MASK_LOW;
3247 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3248 u32 interval = beacon_interval * TIME_UNIT;
3249 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3250 (addon & BEACON_TIME_MASK_HIGH);
3251
3252 if (base_low > addon_low)
3253 res += base_low - addon_low;
3254 else if (base_low < addon_low) {
3255 res += interval + base_low - addon_low;
3256 res += (1 << 24);
3257 } else
3258 res += (1 << 24);
3259
3260 return cpu_to_le32(res);
3261 }
3262
3263 static int iwl_get_measurement(struct iwl_priv *priv,
3264 struct ieee80211_measurement_params *params,
3265 u8 type)
3266 {
3267 struct iwl_spectrum_cmd spectrum;
3268 struct iwl_rx_packet *res;
3269 struct iwl_host_cmd cmd = {
3270 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3271 .data = (void *)&spectrum,
3272 .meta.flags = CMD_WANT_SKB,
3273 };
3274 u32 add_time = le64_to_cpu(params->start_time);
3275 int rc;
3276 int spectrum_resp_status;
3277 int duration = le16_to_cpu(params->duration);
3278
3279 if (iwl_is_associated(priv))
3280 add_time =
3281 iwl_usecs_to_beacons(
3282 le64_to_cpu(params->start_time) - priv->last_tsf,
3283 le16_to_cpu(priv->rxon_timing.beacon_interval));
3284
3285 memset(&spectrum, 0, sizeof(spectrum));
3286
3287 spectrum.channel_count = cpu_to_le16(1);
3288 spectrum.flags =
3289 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3290 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3291 cmd.len = sizeof(spectrum);
3292 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3293
3294 if (iwl_is_associated(priv))
3295 spectrum.start_time =
3296 iwl_add_beacon_time(priv->last_beacon_time,
3297 add_time,
3298 le16_to_cpu(priv->rxon_timing.beacon_interval));
3299 else
3300 spectrum.start_time = 0;
3301
3302 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3303 spectrum.channels[0].channel = params->channel;
3304 spectrum.channels[0].type = type;
3305 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3306 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3307 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3308
3309 rc = iwl_send_cmd_sync(priv, &cmd);
3310 if (rc)
3311 return rc;
3312
3313 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3314 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3315 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3316 rc = -EIO;
3317 }
3318
3319 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3320 switch (spectrum_resp_status) {
3321 case 0: /* Command will be handled */
3322 if (res->u.spectrum.id != 0xff) {
3323 IWL_DEBUG_INFO
3324 ("Replaced existing measurement: %d\n",
3325 res->u.spectrum.id);
3326 priv->measurement_status &= ~MEASUREMENT_READY;
3327 }
3328 priv->measurement_status |= MEASUREMENT_ACTIVE;
3329 rc = 0;
3330 break;
3331
3332 case 1: /* Command will not be handled */
3333 rc = -EAGAIN;
3334 break;
3335 }
3336
3337 dev_kfree_skb_any(cmd.meta.u.skb);
3338
3339 return rc;
3340 }
3341 #endif
3342
3343 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3344 struct iwl_tx_info *tx_sta)
3345 {
3346
3347 tx_sta->status.ack_signal = 0;
3348 tx_sta->status.excessive_retries = 0;
3349 tx_sta->status.queue_length = 0;
3350 tx_sta->status.queue_number = 0;
3351
3352 if (in_interrupt())
3353 ieee80211_tx_status_irqsafe(priv->hw,
3354 tx_sta->skb[0], &(tx_sta->status));
3355 else
3356 ieee80211_tx_status(priv->hw,
3357 tx_sta->skb[0], &(tx_sta->status));
3358
3359 tx_sta->skb[0] = NULL;
3360 }
3361
3362 /**
3363 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3364 *
3365 * When FW advances 'R' index, all entries between old and
3366 * new 'R' index need to be reclaimed. As result, some free space
3367 * forms. If there is enough free space (> low mark), wake Tx queue.
3368 */
3369 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3370 {
3371 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3372 struct iwl_queue *q = &txq->q;
3373 int nfreed = 0;
3374
3375 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3376 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3377 "is out of range [0-%d] %d %d.\n", txq_id,
3378 index, q->n_bd, q->first_empty, q->last_used);
3379 return 0;
3380 }
3381
3382 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3383 q->last_used != index;
3384 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3385 if (txq_id != IWL_CMD_QUEUE_NUM) {
3386 iwl_txstatus_to_ieee(priv,
3387 &(txq->txb[txq->q.last_used]));
3388 iwl_hw_txq_free_tfd(priv, txq);
3389 } else if (nfreed > 1) {
3390 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3391 q->first_empty, q->last_used);
3392 queue_work(priv->workqueue, &priv->restart);
3393 }
3394 nfreed++;
3395 }
3396
3397 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3398 (txq_id != IWL_CMD_QUEUE_NUM) &&
3399 priv->mac80211_registered)
3400 ieee80211_wake_queue(priv->hw, txq_id);
3401
3402
3403 return nfreed;
3404 }
3405
3406 static int iwl_is_tx_success(u32 status)
3407 {
3408 return (status & 0xFF) == 0x1;
3409 }
3410
3411 /******************************************************************************
3412 *
3413 * Generic RX handler implementations
3414 *
3415 ******************************************************************************/
3416 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3417 struct iwl_rx_mem_buffer *rxb)
3418 {
3419 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3420 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3421 int txq_id = SEQ_TO_QUEUE(sequence);
3422 int index = SEQ_TO_INDEX(sequence);
3423 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3424 struct ieee80211_tx_status *tx_status;
3425 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3426 u32 status = le32_to_cpu(tx_resp->status);
3427
3428 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3429 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3430 "is out of range [0-%d] %d %d\n", txq_id,
3431 index, txq->q.n_bd, txq->q.first_empty,
3432 txq->q.last_used);
3433 return;
3434 }
3435
3436 tx_status = &(txq->txb[txq->q.last_used].status);
3437
3438 tx_status->retry_count = tx_resp->failure_frame;
3439 tx_status->queue_number = status;
3440 tx_status->queue_length = tx_resp->bt_kill_count;
3441 tx_status->queue_length |= tx_resp->failure_rts;
3442
3443 tx_status->flags =
3444 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3445
3446 tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3447
3448 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3449 txq_id, iwl_get_tx_fail_reason(status), status,
3450 tx_resp->rate, tx_resp->failure_frame);
3451
3452 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3453 if (index != -1)
3454 iwl_tx_queue_reclaim(priv, txq_id, index);
3455
3456 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3457 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3458 }
3459
3460
3461 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3462 struct iwl_rx_mem_buffer *rxb)
3463 {
3464 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3465 struct iwl_alive_resp *palive;
3466 struct delayed_work *pwork;
3467
3468 palive = &pkt->u.alive_frame;
3469
3470 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3471 "0x%01X 0x%01X\n",
3472 palive->is_valid, palive->ver_type,
3473 palive->ver_subtype);
3474
3475 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3476 IWL_DEBUG_INFO("Initialization Alive received.\n");
3477 memcpy(&priv->card_alive_init,
3478 &pkt->u.alive_frame,
3479 sizeof(struct iwl_init_alive_resp));
3480 pwork = &priv->init_alive_start;
3481 } else {
3482 IWL_DEBUG_INFO("Runtime Alive received.\n");
3483 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3484 sizeof(struct iwl_alive_resp));
3485 pwork = &priv->alive_start;
3486 iwl_disable_events(priv);
3487 }
3488
3489 /* We delay the ALIVE response by 5ms to
3490 * give the HW RF Kill time to activate... */
3491 if (palive->is_valid == UCODE_VALID_OK)
3492 queue_delayed_work(priv->workqueue, pwork,
3493 msecs_to_jiffies(5));
3494 else
3495 IWL_WARNING("uCode did not respond OK.\n");
3496 }
3497
3498 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3499 struct iwl_rx_mem_buffer *rxb)
3500 {
3501 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3502
3503 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3504 return;
3505 }
3506
3507 static void iwl_rx_reply_error(struct iwl_priv *priv,
3508 struct iwl_rx_mem_buffer *rxb)
3509 {
3510 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3511
3512 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3513 "seq 0x%04X ser 0x%08X\n",
3514 le32_to_cpu(pkt->u.err_resp.error_type),
3515 get_cmd_string(pkt->u.err_resp.cmd_id),
3516 pkt->u.err_resp.cmd_id,
3517 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3518 le32_to_cpu(pkt->u.err_resp.error_info));
3519 }
3520
3521 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3522
3523 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3524 {
3525 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3526 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3527 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3528 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3529 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3530 rxon->channel = csa->channel;
3531 priv->staging_rxon.channel = csa->channel;
3532 }
3533
3534 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3535 struct iwl_rx_mem_buffer *rxb)
3536 {
3537 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3538 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3539 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3540
3541 if (!report->state) {
3542 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3543 "Spectrum Measure Notification: Start\n");
3544 return;
3545 }
3546
3547 memcpy(&priv->measure_report, report, sizeof(*report));
3548 priv->measurement_status |= MEASUREMENT_READY;
3549 #endif
3550 }
3551
3552 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3553 struct iwl_rx_mem_buffer *rxb)
3554 {
3555 #ifdef CONFIG_IWLWIFI_DEBUG
3556 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3557 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3558 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3559 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3560 #endif
3561 }
3562
3563 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3564 struct iwl_rx_mem_buffer *rxb)
3565 {
3566 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3567 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3568 "notification for %s:\n",
3569 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3570 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3571 }
3572
3573 static void iwl_bg_beacon_update(struct work_struct *work)
3574 {
3575 struct iwl_priv *priv =
3576 container_of(work, struct iwl_priv, beacon_update);
3577 struct sk_buff *beacon;
3578
3579 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3580 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3581
3582 if (!beacon) {
3583 IWL_ERROR("update beacon failed\n");
3584 return;
3585 }
3586
3587 mutex_lock(&priv->mutex);
3588 /* new beacon skb is allocated every time; dispose previous.*/
3589 if (priv->ibss_beacon)
3590 dev_kfree_skb(priv->ibss_beacon);
3591
3592 priv->ibss_beacon = beacon;
3593 mutex_unlock(&priv->mutex);
3594
3595 iwl_send_beacon_cmd(priv);
3596 }
3597
3598 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3599 struct iwl_rx_mem_buffer *rxb)
3600 {
3601 #ifdef CONFIG_IWLWIFI_DEBUG
3602 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3603 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3604 u8 rate = beacon->beacon_notify_hdr.rate;
3605
3606 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3607 "tsf %d %d rate %d\n",
3608 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3609 beacon->beacon_notify_hdr.failure_frame,
3610 le32_to_cpu(beacon->ibss_mgr_status),
3611 le32_to_cpu(beacon->high_tsf),
3612 le32_to_cpu(beacon->low_tsf), rate);
3613 #endif
3614
3615 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3616 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3617 queue_work(priv->workqueue, &priv->beacon_update);
3618 }
3619
3620 /* Service response to REPLY_SCAN_CMD (0x80) */
3621 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3622 struct iwl_rx_mem_buffer *rxb)
3623 {
3624 #ifdef CONFIG_IWLWIFI_DEBUG
3625 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3626 struct iwl_scanreq_notification *notif =
3627 (struct iwl_scanreq_notification *)pkt->u.raw;
3628
3629 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3630 #endif
3631 }
3632
3633 /* Service SCAN_START_NOTIFICATION (0x82) */
3634 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3635 struct iwl_rx_mem_buffer *rxb)
3636 {
3637 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3638 struct iwl_scanstart_notification *notif =
3639 (struct iwl_scanstart_notification *)pkt->u.raw;
3640 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3641 IWL_DEBUG_SCAN("Scan start: "
3642 "%d [802.11%s] "
3643 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3644 notif->channel,
3645 notif->band ? "bg" : "a",
3646 notif->tsf_high,
3647 notif->tsf_low, notif->status, notif->beacon_timer);
3648 }
3649
3650 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3651 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3652 struct iwl_rx_mem_buffer *rxb)
3653 {
3654 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3655 struct iwl_scanresults_notification *notif =
3656 (struct iwl_scanresults_notification *)pkt->u.raw;
3657
3658 IWL_DEBUG_SCAN("Scan ch.res: "
3659 "%d [802.11%s] "
3660 "(TSF: 0x%08X:%08X) - %d "
3661 "elapsed=%lu usec (%dms since last)\n",
3662 notif->channel,
3663 notif->band ? "bg" : "a",
3664 le32_to_cpu(notif->tsf_high),
3665 le32_to_cpu(notif->tsf_low),
3666 le32_to_cpu(notif->statistics[0]),
3667 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3668 jiffies_to_msecs(elapsed_jiffies
3669 (priv->last_scan_jiffies, jiffies)));
3670
3671 priv->last_scan_jiffies = jiffies;
3672 }
3673
3674 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3675 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3676 struct iwl_rx_mem_buffer *rxb)
3677 {
3678 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3679 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3680
3681 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3682 scan_notif->scanned_channels,
3683 scan_notif->tsf_low,
3684 scan_notif->tsf_high, scan_notif->status);
3685
3686 /* The HW is no longer scanning */
3687 clear_bit(STATUS_SCAN_HW, &priv->status);
3688
3689 /* The scan completion notification came in, so kill that timer... */
3690 cancel_delayed_work(&priv->scan_check);
3691
3692 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3693 (priv->scan_bands == 2) ? "2.4" : "5.2",
3694 jiffies_to_msecs(elapsed_jiffies
3695 (priv->scan_pass_start, jiffies)));
3696
3697 /* Remove this scanned band from the list
3698 * of pending bands to scan */
3699 priv->scan_bands--;
3700
3701 /* If a request to abort was given, or the scan did not succeed
3702 * then we reset the scan state machine and terminate,
3703 * re-queuing another scan if one has been requested */
3704 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3705 IWL_DEBUG_INFO("Aborted scan completed.\n");
3706 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3707 } else {
3708 /* If there are more bands on this scan pass reschedule */
3709 if (priv->scan_bands > 0)
3710 goto reschedule;
3711 }
3712
3713 priv->last_scan_jiffies = jiffies;
3714 IWL_DEBUG_INFO("Setting scan to off\n");
3715
3716 clear_bit(STATUS_SCANNING, &priv->status);
3717
3718 IWL_DEBUG_INFO("Scan took %dms\n",
3719 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3720
3721 queue_work(priv->workqueue, &priv->scan_completed);
3722
3723 return;
3724
3725 reschedule:
3726 priv->scan_pass_start = jiffies;
3727 queue_work(priv->workqueue, &priv->request_scan);
3728 }
3729
3730 /* Handle notification from uCode that card's power state is changing
3731 * due to software, hardware, or critical temperature RFKILL */
3732 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3733 struct iwl_rx_mem_buffer *rxb)
3734 {
3735 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3736 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3737 unsigned long status = priv->status;
3738
3739 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3740 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3741 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3742
3743 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3744 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3745
3746 if (flags & HW_CARD_DISABLED)
3747 set_bit(STATUS_RF_KILL_HW, &priv->status);
3748 else
3749 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3750
3751
3752 if (flags & SW_CARD_DISABLED)
3753 set_bit(STATUS_RF_KILL_SW, &priv->status);
3754 else
3755 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3756
3757 iwl_scan_cancel(priv);
3758
3759 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3760 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3761 (test_bit(STATUS_RF_KILL_SW, &status) !=
3762 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3763 queue_work(priv->workqueue, &priv->rf_kill);
3764 else
3765 wake_up_interruptible(&priv->wait_command_queue);
3766 }
3767
3768 /**
3769 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3770 *
3771 * Setup the RX handlers for each of the reply types sent from the uCode
3772 * to the host.
3773 *
3774 * This function chains into the hardware specific files for them to setup
3775 * any hardware specific handlers as well.
3776 */
3777 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3778 {
3779 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3780 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3781 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3782 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3783 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3784 iwl_rx_spectrum_measure_notif;
3785 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3786 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3787 iwl_rx_pm_debug_statistics_notif;
3788 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3789
3790 /* NOTE: iwl_rx_statistics is different based on whether
3791 * the build is for the 3945 or the 4965. See the
3792 * corresponding implementation in iwl-XXXX.c
3793 *
3794 * The same handler is used for both the REPLY to a
3795 * discrete statistics request from the host as well as
3796 * for the periodic statistics notification from the uCode
3797 */
3798 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3799 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3800
3801 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3802 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3803 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3804 iwl_rx_scan_results_notif;
3805 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3806 iwl_rx_scan_complete_notif;
3807 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3808 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3809
3810 /* Setup hardware specific Rx handlers */
3811 iwl_hw_rx_handler_setup(priv);
3812 }
3813
3814 /**
3815 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3816 * @rxb: Rx buffer to reclaim
3817 *
3818 * If an Rx buffer has an async callback associated with it the callback
3819 * will be executed. The attached skb (if present) will only be freed
3820 * if the callback returns 1
3821 */
3822 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3823 struct iwl_rx_mem_buffer *rxb)
3824 {
3825 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3826 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3827 int txq_id = SEQ_TO_QUEUE(sequence);
3828 int index = SEQ_TO_INDEX(sequence);
3829 int huge = sequence & SEQ_HUGE_FRAME;
3830 int cmd_index;
3831 struct iwl_cmd *cmd;
3832
3833 /* If a Tx command is being handled and it isn't in the actual
3834 * command queue then there a command routing bug has been introduced
3835 * in the queue management code. */
3836 if (txq_id != IWL_CMD_QUEUE_NUM)
3837 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3838 txq_id, pkt->hdr.cmd);
3839 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3840
3841 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3842 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3843
3844 /* Input error checking is done when commands are added to queue. */
3845 if (cmd->meta.flags & CMD_WANT_SKB) {
3846 cmd->meta.source->u.skb = rxb->skb;
3847 rxb->skb = NULL;
3848 } else if (cmd->meta.u.callback &&
3849 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3850 rxb->skb = NULL;
3851
3852 iwl_tx_queue_reclaim(priv, txq_id, index);
3853
3854 if (!(cmd->meta.flags & CMD_ASYNC)) {
3855 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3856 wake_up_interruptible(&priv->wait_command_queue);
3857 }
3858 }
3859
3860 /************************** RX-FUNCTIONS ****************************/
3861 /*
3862 * Rx theory of operation
3863 *
3864 * The host allocates 32 DMA target addresses and passes the host address
3865 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3866 * 0 to 31
3867 *
3868 * Rx Queue Indexes
3869 * The host/firmware share two index registers for managing the Rx buffers.
3870 *
3871 * The READ index maps to the first position that the firmware may be writing
3872 * to -- the driver can read up to (but not including) this position and get
3873 * good data.
3874 * The READ index is managed by the firmware once the card is enabled.
3875 *
3876 * The WRITE index maps to the last position the driver has read from -- the
3877 * position preceding WRITE is the last slot the firmware can place a packet.
3878 *
3879 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3880 * WRITE = READ.
3881 *
3882 * During initialization the host sets up the READ queue position to the first
3883 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3884 *
3885 * When the firmware places a packet in a buffer it will advance the READ index
3886 * and fire the RX interrupt. The driver can then query the READ index and
3887 * process as many packets as possible, moving the WRITE index forward as it
3888 * resets the Rx queue buffers with new memory.
3889 *
3890 * The management in the driver is as follows:
3891 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3892 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3893 * to replensish the iwl->rxq->rx_free.
3894 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3895 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3896 * 'processed' and 'read' driver indexes as well)
3897 * + A received packet is processed and handed to the kernel network stack,
3898 * detached from the iwl->rxq. The driver 'processed' index is updated.
3899 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3900 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3901 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3902 * were enough free buffers and RX_STALLED is set it is cleared.
3903 *
3904 *
3905 * Driver sequence:
3906 *
3907 * iwl_rx_queue_alloc() Allocates rx_free
3908 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
3909 * iwl_rx_queue_restock
3910 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
3911 * queue, updates firmware pointers, and updates
3912 * the WRITE index. If insufficient rx_free buffers
3913 * are available, schedules iwl_rx_replenish
3914 *
3915 * -- enable interrupts --
3916 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
3917 * READ INDEX, detaching the SKB from the pool.
3918 * Moves the packet buffer from queue to rx_used.
3919 * Calls iwl_rx_queue_restock to refill any empty
3920 * slots.
3921 * ...
3922 *
3923 */
3924
3925 /**
3926 * iwl_rx_queue_space - Return number of free slots available in queue.
3927 */
3928 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3929 {
3930 int s = q->read - q->write;
3931 if (s <= 0)
3932 s += RX_QUEUE_SIZE;
3933 /* keep some buffer to not confuse full and empty queue */
3934 s -= 2;
3935 if (s < 0)
3936 s = 0;
3937 return s;
3938 }
3939
3940 /**
3941 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3942 *
3943 * NOTE: This function has 3945 and 4965 specific code sections
3944 * but is declared in base due to the majority of the
3945 * implementation being the same (only a numeric constant is
3946 * different)
3947 *
3948 */
3949 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3950 {
3951 u32 reg = 0;
3952 int rc = 0;
3953 unsigned long flags;
3954
3955 spin_lock_irqsave(&q->lock, flags);
3956
3957 if (q->need_update == 0)
3958 goto exit_unlock;
3959
3960 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3961 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3962
3963 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3964 iwl_set_bit(priv, CSR_GP_CNTRL,
3965 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3966 goto exit_unlock;
3967 }
3968
3969 rc = iwl_grab_restricted_access(priv);
3970 if (rc)
3971 goto exit_unlock;
3972
3973 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3974 q->write & ~0x7);
3975 iwl_release_restricted_access(priv);
3976 } else
3977 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3978
3979
3980 q->need_update = 0;
3981
3982 exit_unlock:
3983 spin_unlock_irqrestore(&q->lock, flags);
3984 return rc;
3985 }
3986
3987 /**
3988 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3989 *
3990 * NOTE: This function has 3945 and 4965 specific code paths in it.
3991 */
3992 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3993 dma_addr_t dma_addr)
3994 {
3995 return cpu_to_le32((u32)dma_addr);
3996 }
3997
3998 /**
3999 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4000 *
4001 * If there are slots in the RX queue that need to be restocked,
4002 * and we have free pre-allocated buffers, fill the ranks as much
4003 * as we can pulling from rx_free.
4004 *
4005 * This moves the 'write' index forward to catch up with 'processed', and
4006 * also updates the memory address in the firmware to reference the new
4007 * target buffer.
4008 */
4009 int iwl_rx_queue_restock(struct iwl_priv *priv)
4010 {
4011 struct iwl_rx_queue *rxq = &priv->rxq;
4012 struct list_head *element;
4013 struct iwl_rx_mem_buffer *rxb;
4014 unsigned long flags;
4015 int write, rc;
4016
4017 spin_lock_irqsave(&rxq->lock, flags);
4018 write = rxq->write & ~0x7;
4019 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4020 element = rxq->rx_free.next;
4021 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4022 list_del(element);
4023 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4024 rxq->queue[rxq->write] = rxb;
4025 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4026 rxq->free_count--;
4027 }
4028 spin_unlock_irqrestore(&rxq->lock, flags);
4029 /* If the pre-allocated buffer pool is dropping low, schedule to
4030 * refill it */
4031 if (rxq->free_count <= RX_LOW_WATERMARK)
4032 queue_work(priv->workqueue, &priv->rx_replenish);
4033
4034
4035 /* If we've added more space for the firmware to place data, tell it */
4036 if ((write != (rxq->write & ~0x7))
4037 || (abs(rxq->write - rxq->read) > 7)) {
4038 spin_lock_irqsave(&rxq->lock, flags);
4039 rxq->need_update = 1;
4040 spin_unlock_irqrestore(&rxq->lock, flags);
4041 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4042 if (rc)
4043 return rc;
4044 }
4045
4046 return 0;
4047 }
4048
4049 /**
4050 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4051 *
4052 * When moving to rx_free an SKB is allocated for the slot.
4053 *
4054 * Also restock the Rx queue via iwl_rx_queue_restock.
4055 * This is called as a scheduled work item (except for during intialization)
4056 */
4057 void iwl_rx_replenish(void *data)
4058 {
4059 struct iwl_priv *priv = data;
4060 struct iwl_rx_queue *rxq = &priv->rxq;
4061 struct list_head *element;
4062 struct iwl_rx_mem_buffer *rxb;
4063 unsigned long flags;
4064 spin_lock_irqsave(&rxq->lock, flags);
4065 while (!list_empty(&rxq->rx_used)) {
4066 element = rxq->rx_used.next;
4067 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4068 rxb->skb =
4069 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4070 if (!rxb->skb) {
4071 if (net_ratelimit())
4072 printk(KERN_CRIT DRV_NAME
4073 ": Can not allocate SKB buffers\n");
4074 /* We don't reschedule replenish work here -- we will
4075 * call the restock method and if it still needs
4076 * more buffers it will schedule replenish */
4077 break;
4078 }
4079 priv->alloc_rxb_skb++;
4080 list_del(element);
4081 rxb->dma_addr =
4082 pci_map_single(priv->pci_dev, rxb->skb->data,
4083 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4084 list_add_tail(&rxb->list, &rxq->rx_free);
4085 rxq->free_count++;
4086 }
4087 spin_unlock_irqrestore(&rxq->lock, flags);
4088
4089 spin_lock_irqsave(&priv->lock, flags);
4090 iwl_rx_queue_restock(priv);
4091 spin_unlock_irqrestore(&priv->lock, flags);
4092 }
4093
4094 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4095 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4096 * This free routine walks the list of POOL entries and if SKB is set to
4097 * non NULL it is unmapped and freed
4098 */
4099 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4100 {
4101 int i;
4102 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4103 if (rxq->pool[i].skb != NULL) {
4104 pci_unmap_single(priv->pci_dev,
4105 rxq->pool[i].dma_addr,
4106 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4107 dev_kfree_skb(rxq->pool[i].skb);
4108 }
4109 }
4110
4111 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4112 rxq->dma_addr);
4113 rxq->bd = NULL;
4114 }
4115
4116 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4117 {
4118 struct iwl_rx_queue *rxq = &priv->rxq;
4119 struct pci_dev *dev = priv->pci_dev;
4120 int i;
4121
4122 spin_lock_init(&rxq->lock);
4123 INIT_LIST_HEAD(&rxq->rx_free);
4124 INIT_LIST_HEAD(&rxq->rx_used);
4125 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4126 if (!rxq->bd)
4127 return -ENOMEM;
4128 /* Fill the rx_used queue with _all_ of the Rx buffers */
4129 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4130 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4131 /* Set us so that we have processed and used all buffers, but have
4132 * not restocked the Rx queue with fresh buffers */
4133 rxq->read = rxq->write = 0;
4134 rxq->free_count = 0;
4135 rxq->need_update = 0;
4136 return 0;
4137 }
4138
4139 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4140 {
4141 unsigned long flags;
4142 int i;
4143 spin_lock_irqsave(&rxq->lock, flags);
4144 INIT_LIST_HEAD(&rxq->rx_free);
4145 INIT_LIST_HEAD(&rxq->rx_used);
4146 /* Fill the rx_used queue with _all_ of the Rx buffers */
4147 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4148 /* In the reset function, these buffers may have been allocated
4149 * to an SKB, so we need to unmap and free potential storage */
4150 if (rxq->pool[i].skb != NULL) {
4151 pci_unmap_single(priv->pci_dev,
4152 rxq->pool[i].dma_addr,
4153 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4154 priv->alloc_rxb_skb--;
4155 dev_kfree_skb(rxq->pool[i].skb);
4156 rxq->pool[i].skb = NULL;
4157 }
4158 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4159 }
4160
4161 /* Set us so that we have processed and used all buffers, but have
4162 * not restocked the Rx queue with fresh buffers */
4163 rxq->read = rxq->write = 0;
4164 rxq->free_count = 0;
4165 spin_unlock_irqrestore(&rxq->lock, flags);
4166 }
4167
4168 /* Convert linear signal-to-noise ratio into dB */
4169 static u8 ratio2dB[100] = {
4170 /* 0 1 2 3 4 5 6 7 8 9 */
4171 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4172 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4173 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4174 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4175 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4176 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4177 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4178 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4179 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4180 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4181 };
4182
4183 /* Calculates a relative dB value from a ratio of linear
4184 * (i.e. not dB) signal levels.
4185 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4186 int iwl_calc_db_from_ratio(int sig_ratio)
4187 {
4188 /* Anything above 1000:1 just report as 60 dB */
4189 if (sig_ratio > 1000)
4190 return 60;
4191
4192 /* Above 100:1, divide by 10 and use table,
4193 * add 20 dB to make up for divide by 10 */
4194 if (sig_ratio > 100)
4195 return (20 + (int)ratio2dB[sig_ratio/10]);
4196
4197 /* We shouldn't see this */
4198 if (sig_ratio < 1)
4199 return 0;
4200
4201 /* Use table for ratios 1:1 - 99:1 */
4202 return (int)ratio2dB[sig_ratio];
4203 }
4204
4205 #define PERFECT_RSSI (-20) /* dBm */
4206 #define WORST_RSSI (-95) /* dBm */
4207 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4208
4209 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4210 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4211 * about formulas used below. */
4212 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4213 {
4214 int sig_qual;
4215 int degradation = PERFECT_RSSI - rssi_dbm;
4216
4217 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4218 * as indicator; formula is (signal dbm - noise dbm).
4219 * SNR at or above 40 is a great signal (100%).
4220 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4221 * Weakest usable signal is usually 10 - 15 dB SNR. */
4222 if (noise_dbm) {
4223 if (rssi_dbm - noise_dbm >= 40)
4224 return 100;
4225 else if (rssi_dbm < noise_dbm)
4226 return 0;
4227 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4228
4229 /* Else use just the signal level.
4230 * This formula is a least squares fit of data points collected and
4231 * compared with a reference system that had a percentage (%) display
4232 * for signal quality. */
4233 } else
4234 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4235 (15 * RSSI_RANGE + 62 * degradation)) /
4236 (RSSI_RANGE * RSSI_RANGE);
4237
4238 if (sig_qual > 100)
4239 sig_qual = 100;
4240 else if (sig_qual < 1)
4241 sig_qual = 0;
4242
4243 return sig_qual;
4244 }
4245
4246 /**
4247 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4248 *
4249 * Uses the priv->rx_handlers callback function array to invoke
4250 * the appropriate handlers, including command responses,
4251 * frame-received notifications, and other notifications.
4252 */
4253 static void iwl_rx_handle(struct iwl_priv *priv)
4254 {
4255 struct iwl_rx_mem_buffer *rxb;
4256 struct iwl_rx_packet *pkt;
4257 struct iwl_rx_queue *rxq = &priv->rxq;
4258 u32 r, i;
4259 int reclaim;
4260 unsigned long flags;
4261
4262 r = iwl_hw_get_rx_read(priv);
4263 i = rxq->read;
4264
4265 /* Rx interrupt, but nothing sent from uCode */
4266 if (i == r)
4267 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4268
4269 while (i != r) {
4270 rxb = rxq->queue[i];
4271
4272 /* If an RXB doesn't have a queue slot associated with it
4273 * then a bug has been introduced in the queue refilling
4274 * routines -- catch it here */
4275 BUG_ON(rxb == NULL);
4276
4277 rxq->queue[i] = NULL;
4278
4279 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4280 IWL_RX_BUF_SIZE,
4281 PCI_DMA_FROMDEVICE);
4282 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4283
4284 /* Reclaim a command buffer only if this packet is a response
4285 * to a (driver-originated) command.
4286 * If the packet (e.g. Rx frame) originated from uCode,
4287 * there is no command buffer to reclaim.
4288 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4289 * but apparently a few don't get set; catch them here. */
4290 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4291 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4292 (pkt->hdr.cmd != REPLY_TX);
4293
4294 /* Based on type of command response or notification,
4295 * handle those that need handling via function in
4296 * rx_handlers table. See iwl_setup_rx_handlers() */
4297 if (priv->rx_handlers[pkt->hdr.cmd]) {
4298 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4299 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4300 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4301 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4302 } else {
4303 /* No handling needed */
4304 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4305 "r %d i %d No handler needed for %s, 0x%02x\n",
4306 r, i, get_cmd_string(pkt->hdr.cmd),
4307 pkt->hdr.cmd);
4308 }
4309
4310 if (reclaim) {
4311 /* Invoke any callbacks, transfer the skb to caller,
4312 * and fire off the (possibly) blocking iwl_send_cmd()
4313 * as we reclaim the driver command queue */
4314 if (rxb && rxb->skb)
4315 iwl_tx_cmd_complete(priv, rxb);
4316 else
4317 IWL_WARNING("Claim null rxb?\n");
4318 }
4319
4320 /* For now we just don't re-use anything. We can tweak this
4321 * later to try and re-use notification packets and SKBs that
4322 * fail to Rx correctly */
4323 if (rxb->skb != NULL) {
4324 priv->alloc_rxb_skb--;
4325 dev_kfree_skb_any(rxb->skb);
4326 rxb->skb = NULL;
4327 }
4328
4329 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4330 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4331 spin_lock_irqsave(&rxq->lock, flags);
4332 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4333 spin_unlock_irqrestore(&rxq->lock, flags);
4334 i = (i + 1) & RX_QUEUE_MASK;
4335 }
4336
4337 /* Backtrack one entry */
4338 priv->rxq.read = i;
4339 iwl_rx_queue_restock(priv);
4340 }
4341
4342 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4343 struct iwl_tx_queue *txq)
4344 {
4345 u32 reg = 0;
4346 int rc = 0;
4347 int txq_id = txq->q.id;
4348
4349 if (txq->need_update == 0)
4350 return rc;
4351
4352 /* if we're trying to save power */
4353 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4354 /* wake up nic if it's powered down ...
4355 * uCode will wake up, and interrupt us again, so next
4356 * time we'll skip this part. */
4357 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4358
4359 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4360 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4361 iwl_set_bit(priv, CSR_GP_CNTRL,
4362 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4363 return rc;
4364 }
4365
4366 /* restore this queue's parameters in nic hardware. */
4367 rc = iwl_grab_restricted_access(priv);
4368 if (rc)
4369 return rc;
4370 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4371 txq->q.first_empty | (txq_id << 8));
4372 iwl_release_restricted_access(priv);
4373
4374 /* else not in power-save mode, uCode will never sleep when we're
4375 * trying to tx (during RFKILL, we're not trying to tx). */
4376 } else
4377 iwl_write32(priv, HBUS_TARG_WRPTR,
4378 txq->q.first_empty | (txq_id << 8));
4379
4380 txq->need_update = 0;
4381
4382 return rc;
4383 }
4384
4385 #ifdef CONFIG_IWLWIFI_DEBUG
4386 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4387 {
4388 DECLARE_MAC_BUF(mac);
4389
4390 IWL_DEBUG_RADIO("RX CONFIG:\n");
4391 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4392 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4393 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4394 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4395 le32_to_cpu(rxon->filter_flags));
4396 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4397 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4398 rxon->ofdm_basic_rates);
4399 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4400 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4401 print_mac(mac, rxon->node_addr));
4402 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4403 print_mac(mac, rxon->bssid_addr));
4404 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4405 }
4406 #endif
4407
4408 static void iwl_enable_interrupts(struct iwl_priv *priv)
4409 {
4410 IWL_DEBUG_ISR("Enabling interrupts\n");
4411 set_bit(STATUS_INT_ENABLED, &priv->status);
4412 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4413 }
4414
4415 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4416 {
4417 clear_bit(STATUS_INT_ENABLED, &priv->status);
4418
4419 /* disable interrupts from uCode/NIC to host */
4420 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4421
4422 /* acknowledge/clear/reset any interrupts still pending
4423 * from uCode or flow handler (Rx/Tx DMA) */
4424 iwl_write32(priv, CSR_INT, 0xffffffff);
4425 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4426 IWL_DEBUG_ISR("Disabled interrupts\n");
4427 }
4428
4429 static const char *desc_lookup(int i)
4430 {
4431 switch (i) {
4432 case 1:
4433 return "FAIL";
4434 case 2:
4435 return "BAD_PARAM";
4436 case 3:
4437 return "BAD_CHECKSUM";
4438 case 4:
4439 return "NMI_INTERRUPT";
4440 case 5:
4441 return "SYSASSERT";
4442 case 6:
4443 return "FATAL_ERROR";
4444 }
4445
4446 return "UNKNOWN";
4447 }
4448
4449 #define ERROR_START_OFFSET (1 * sizeof(u32))
4450 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4451
4452 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4453 {
4454 u32 i;
4455 u32 desc, time, count, base, data1;
4456 u32 blink1, blink2, ilink1, ilink2;
4457 int rc;
4458
4459 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4460
4461 if (!iwl_hw_valid_rtc_data_addr(base)) {
4462 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4463 return;
4464 }
4465
4466 rc = iwl_grab_restricted_access(priv);
4467 if (rc) {
4468 IWL_WARNING("Can not read from adapter at this time.\n");
4469 return;
4470 }
4471
4472 count = iwl_read_restricted_mem(priv, base);
4473
4474 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4475 IWL_ERROR("Start IWL Error Log Dump:\n");
4476 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4477 priv->status, priv->config, count);
4478 }
4479
4480 IWL_ERROR("Desc Time asrtPC blink2 "
4481 "ilink1 nmiPC Line\n");
4482 for (i = ERROR_START_OFFSET;
4483 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4484 i += ERROR_ELEM_SIZE) {
4485 desc = iwl_read_restricted_mem(priv, base + i);
4486 time =
4487 iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4488 blink1 =
4489 iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4490 blink2 =
4491 iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4492 ilink1 =
4493 iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4494 ilink2 =
4495 iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4496 data1 =
4497 iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4498
4499 IWL_ERROR
4500 ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4501 desc_lookup(desc), desc, time, blink1, blink2,
4502 ilink1, ilink2, data1);
4503 }
4504
4505 iwl_release_restricted_access(priv);
4506
4507 }
4508
4509 #define EVENT_START_OFFSET (4 * sizeof(u32))
4510
4511 /**
4512 * iwl_print_event_log - Dump error event log to syslog
4513 *
4514 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4515 */
4516 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4517 u32 num_events, u32 mode)
4518 {
4519 u32 i;
4520 u32 base; /* SRAM byte address of event log header */
4521 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4522 u32 ptr; /* SRAM byte address of log data */
4523 u32 ev, time, data; /* event log data */
4524
4525 if (num_events == 0)
4526 return;
4527
4528 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4529
4530 if (mode == 0)
4531 event_size = 2 * sizeof(u32);
4532 else
4533 event_size = 3 * sizeof(u32);
4534
4535 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4536
4537 /* "time" is actually "data" for mode 0 (no timestamp).
4538 * place event id # at far right for easier visual parsing. */
4539 for (i = 0; i < num_events; i++) {
4540 ev = iwl_read_restricted_mem(priv, ptr);
4541 ptr += sizeof(u32);
4542 time = iwl_read_restricted_mem(priv, ptr);
4543 ptr += sizeof(u32);
4544 if (mode == 0)
4545 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4546 else {
4547 data = iwl_read_restricted_mem(priv, ptr);
4548 ptr += sizeof(u32);
4549 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4550 }
4551 }
4552 }
4553
4554 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4555 {
4556 int rc;
4557 u32 base; /* SRAM byte address of event log header */
4558 u32 capacity; /* event log capacity in # entries */
4559 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4560 u32 num_wraps; /* # times uCode wrapped to top of log */
4561 u32 next_entry; /* index of next entry to be written by uCode */
4562 u32 size; /* # entries that we'll print */
4563
4564 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4565 if (!iwl_hw_valid_rtc_data_addr(base)) {
4566 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4567 return;
4568 }
4569
4570 rc = iwl_grab_restricted_access(priv);
4571 if (rc) {
4572 IWL_WARNING("Can not read from adapter at this time.\n");
4573 return;
4574 }
4575
4576 /* event log header */
4577 capacity = iwl_read_restricted_mem(priv, base);
4578 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4579 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4580 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4581
4582 size = num_wraps ? capacity : next_entry;
4583
4584 /* bail out if nothing in log */
4585 if (size == 0) {
4586 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4587 iwl_release_restricted_access(priv);
4588 return;
4589 }
4590
4591 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4592 size, num_wraps);
4593
4594 /* if uCode has wrapped back to top of log, start at the oldest entry,
4595 * i.e the next one that uCode would fill. */
4596 if (num_wraps)
4597 iwl_print_event_log(priv, next_entry,
4598 capacity - next_entry, mode);
4599
4600 /* (then/else) start at top of log */
4601 iwl_print_event_log(priv, 0, next_entry, mode);
4602
4603 iwl_release_restricted_access(priv);
4604 }
4605
4606 /**
4607 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4608 */
4609 static void iwl_irq_handle_error(struct iwl_priv *priv)
4610 {
4611 /* Set the FW error flag -- cleared on iwl_down */
4612 set_bit(STATUS_FW_ERROR, &priv->status);
4613
4614 /* Cancel currently queued command. */
4615 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4616
4617 #ifdef CONFIG_IWLWIFI_DEBUG
4618 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4619 iwl_dump_nic_error_log(priv);
4620 iwl_dump_nic_event_log(priv);
4621 iwl_print_rx_config_cmd(&priv->staging_rxon);
4622 }
4623 #endif
4624
4625 wake_up_interruptible(&priv->wait_command_queue);
4626
4627 /* Keep the restart process from trying to send host
4628 * commands by clearing the INIT status bit */
4629 clear_bit(STATUS_READY, &priv->status);
4630
4631 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4632 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4633 "Restarting adapter due to uCode error.\n");
4634
4635 if (iwl_is_associated(priv)) {
4636 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4637 sizeof(priv->recovery_rxon));
4638 priv->error_recovering = 1;
4639 }
4640 queue_work(priv->workqueue, &priv->restart);
4641 }
4642 }
4643
4644 static void iwl_error_recovery(struct iwl_priv *priv)
4645 {
4646 unsigned long flags;
4647
4648 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4649 sizeof(priv->staging_rxon));
4650 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4651 iwl_commit_rxon(priv);
4652
4653 iwl_add_station(priv, priv->bssid, 1, 0);
4654
4655 spin_lock_irqsave(&priv->lock, flags);
4656 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4657 priv->error_recovering = 0;
4658 spin_unlock_irqrestore(&priv->lock, flags);
4659 }
4660
4661 static void iwl_irq_tasklet(struct iwl_priv *priv)
4662 {
4663 u32 inta, handled = 0;
4664 u32 inta_fh;
4665 unsigned long flags;
4666 #ifdef CONFIG_IWLWIFI_DEBUG
4667 u32 inta_mask;
4668 #endif
4669
4670 spin_lock_irqsave(&priv->lock, flags);
4671
4672 /* Ack/clear/reset pending uCode interrupts.
4673 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4674 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4675 inta = iwl_read32(priv, CSR_INT);
4676 iwl_write32(priv, CSR_INT, inta);
4677
4678 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4679 * Any new interrupts that happen after this, either while we're
4680 * in this tasklet, or later, will show up in next ISR/tasklet. */
4681 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4682 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4683
4684 #ifdef CONFIG_IWLWIFI_DEBUG
4685 if (iwl_debug_level & IWL_DL_ISR) {
4686 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4687 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4688 inta, inta_mask, inta_fh);
4689 }
4690 #endif
4691
4692 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4693 * atomic, make sure that inta covers all the interrupts that
4694 * we've discovered, even if FH interrupt came in just after
4695 * reading CSR_INT. */
4696 if (inta_fh & CSR_FH_INT_RX_MASK)
4697 inta |= CSR_INT_BIT_FH_RX;
4698 if (inta_fh & CSR_FH_INT_TX_MASK)
4699 inta |= CSR_INT_BIT_FH_TX;
4700
4701 /* Now service all interrupt bits discovered above. */
4702 if (inta & CSR_INT_BIT_HW_ERR) {
4703 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4704
4705 /* Tell the device to stop sending interrupts */
4706 iwl_disable_interrupts(priv);
4707
4708 iwl_irq_handle_error(priv);
4709
4710 handled |= CSR_INT_BIT_HW_ERR;
4711
4712 spin_unlock_irqrestore(&priv->lock, flags);
4713
4714 return;
4715 }
4716
4717 #ifdef CONFIG_IWLWIFI_DEBUG
4718 if (iwl_debug_level & (IWL_DL_ISR)) {
4719 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4720 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4721 IWL_DEBUG_ISR("Microcode started or stopped.\n");
4722
4723 /* Alive notification via Rx interrupt will do the real work */
4724 if (inta & CSR_INT_BIT_ALIVE)
4725 IWL_DEBUG_ISR("Alive interrupt\n");
4726 }
4727 #endif
4728 /* Safely ignore these bits for debug checks below */
4729 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4730
4731 /* HW RF KILL switch toggled (4965 only) */
4732 if (inta & CSR_INT_BIT_RF_KILL) {
4733 int hw_rf_kill = 0;
4734 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4735 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4736 hw_rf_kill = 1;
4737
4738 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4739 "RF_KILL bit toggled to %s.\n",
4740 hw_rf_kill ? "disable radio":"enable radio");
4741
4742 /* Queue restart only if RF_KILL switch was set to "kill"
4743 * when we loaded driver, and is now set to "enable".
4744 * After we're Alive, RF_KILL gets handled by
4745 * iwl_rx_card_state_notif() */
4746 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4747 queue_work(priv->workqueue, &priv->restart);
4748
4749 handled |= CSR_INT_BIT_RF_KILL;
4750 }
4751
4752 /* Chip got too hot and stopped itself (4965 only) */
4753 if (inta & CSR_INT_BIT_CT_KILL) {
4754 IWL_ERROR("Microcode CT kill error detected.\n");
4755 handled |= CSR_INT_BIT_CT_KILL;
4756 }
4757
4758 /* Error detected by uCode */
4759 if (inta & CSR_INT_BIT_SW_ERR) {
4760 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4761 inta);
4762 iwl_irq_handle_error(priv);
4763 handled |= CSR_INT_BIT_SW_ERR;
4764 }
4765
4766 /* uCode wakes up after power-down sleep */
4767 if (inta & CSR_INT_BIT_WAKEUP) {
4768 IWL_DEBUG_ISR("Wakeup interrupt\n");
4769 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4770 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4771 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4772 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4773 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4774 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4775 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4776
4777 handled |= CSR_INT_BIT_WAKEUP;
4778 }
4779
4780 /* All uCode command responses, including Tx command responses,
4781 * Rx "responses" (frame-received notification), and other
4782 * notifications from uCode come through here*/
4783 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4784 iwl_rx_handle(priv);
4785 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4786 }
4787
4788 if (inta & CSR_INT_BIT_FH_TX) {
4789 IWL_DEBUG_ISR("Tx interrupt\n");
4790
4791 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4792 if (!iwl_grab_restricted_access(priv)) {
4793 iwl_write_restricted(priv,
4794 FH_TCSR_CREDIT
4795 (ALM_FH_SRVC_CHNL), 0x0);
4796 iwl_release_restricted_access(priv);
4797 }
4798 handled |= CSR_INT_BIT_FH_TX;
4799 }
4800
4801 if (inta & ~handled)
4802 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4803
4804 if (inta & ~CSR_INI_SET_MASK) {
4805 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4806 inta & ~CSR_INI_SET_MASK);
4807 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4808 }
4809
4810 /* Re-enable all interrupts */
4811 iwl_enable_interrupts(priv);
4812
4813 #ifdef CONFIG_IWLWIFI_DEBUG
4814 if (iwl_debug_level & (IWL_DL_ISR)) {
4815 inta = iwl_read32(priv, CSR_INT);
4816 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4817 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4818 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4819 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4820 }
4821 #endif
4822 spin_unlock_irqrestore(&priv->lock, flags);
4823 }
4824
4825 static irqreturn_t iwl_isr(int irq, void *data)
4826 {
4827 struct iwl_priv *priv = data;
4828 u32 inta, inta_mask;
4829 u32 inta_fh;
4830 if (!priv)
4831 return IRQ_NONE;
4832
4833 spin_lock(&priv->lock);
4834
4835 /* Disable (but don't clear!) interrupts here to avoid
4836 * back-to-back ISRs and sporadic interrupts from our NIC.
4837 * If we have something to service, the tasklet will re-enable ints.
4838 * If we *don't* have something, we'll re-enable before leaving here. */
4839 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4840 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4841
4842 /* Discover which interrupts are active/pending */
4843 inta = iwl_read32(priv, CSR_INT);
4844 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4845
4846 /* Ignore interrupt if there's nothing in NIC to service.
4847 * This may be due to IRQ shared with another device,
4848 * or due to sporadic interrupts thrown from our NIC. */
4849 if (!inta && !inta_fh) {
4850 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4851 goto none;
4852 }
4853
4854 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4855 /* Hardware disappeared */
4856 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4857 goto unplugged;
4858 }
4859
4860 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4861 inta, inta_mask, inta_fh);
4862
4863 /* iwl_irq_tasklet() will service interrupts and re-enable them */
4864 tasklet_schedule(&priv->irq_tasklet);
4865 unplugged:
4866 spin_unlock(&priv->lock);
4867
4868 return IRQ_HANDLED;
4869
4870 none:
4871 /* re-enable interrupts here since we don't have anything to service. */
4872 iwl_enable_interrupts(priv);
4873 spin_unlock(&priv->lock);
4874 return IRQ_NONE;
4875 }
4876
4877 /************************** EEPROM BANDS ****************************
4878 *
4879 * The iwl_eeprom_band definitions below provide the mapping from the
4880 * EEPROM contents to the specific channel number supported for each
4881 * band.
4882 *
4883 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4884 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4885 * The specific geography and calibration information for that channel
4886 * is contained in the eeprom map itself.
4887 *
4888 * During init, we copy the eeprom information and channel map
4889 * information into priv->channel_info_24/52 and priv->channel_map_24/52
4890 *
4891 * channel_map_24/52 provides the index in the channel_info array for a
4892 * given channel. We have to have two separate maps as there is channel
4893 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4894 * band_2
4895 *
4896 * A value of 0xff stored in the channel_map indicates that the channel
4897 * is not supported by the hardware at all.
4898 *
4899 * A value of 0xfe in the channel_map indicates that the channel is not
4900 * valid for Tx with the current hardware. This means that
4901 * while the system can tune and receive on a given channel, it may not
4902 * be able to associate or transmit any frames on that
4903 * channel. There is no corresponding channel information for that
4904 * entry.
4905 *
4906 *********************************************************************/
4907
4908 /* 2.4 GHz */
4909 static const u8 iwl_eeprom_band_1[14] = {
4910 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4911 };
4912
4913 /* 5.2 GHz bands */
4914 static const u8 iwl_eeprom_band_2[] = {
4915 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4916 };
4917
4918 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4919 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4920 };
4921
4922 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4923 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4924 };
4925
4926 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4927 145, 149, 153, 157, 161, 165
4928 };
4929
4930 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4931 int *eeprom_ch_count,
4932 const struct iwl_eeprom_channel
4933 **eeprom_ch_info,
4934 const u8 **eeprom_ch_index)
4935 {
4936 switch (band) {
4937 case 1: /* 2.4GHz band */
4938 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4939 *eeprom_ch_info = priv->eeprom.band_1_channels;
4940 *eeprom_ch_index = iwl_eeprom_band_1;
4941 break;
4942 case 2: /* 5.2GHz band */
4943 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4944 *eeprom_ch_info = priv->eeprom.band_2_channels;
4945 *eeprom_ch_index = iwl_eeprom_band_2;
4946 break;
4947 case 3: /* 5.2GHz band */
4948 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4949 *eeprom_ch_info = priv->eeprom.band_3_channels;
4950 *eeprom_ch_index = iwl_eeprom_band_3;
4951 break;
4952 case 4: /* 5.2GHz band */
4953 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4954 *eeprom_ch_info = priv->eeprom.band_4_channels;
4955 *eeprom_ch_index = iwl_eeprom_band_4;
4956 break;
4957 case 5: /* 5.2GHz band */
4958 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4959 *eeprom_ch_info = priv->eeprom.band_5_channels;
4960 *eeprom_ch_index = iwl_eeprom_band_5;
4961 break;
4962 default:
4963 BUG();
4964 return;
4965 }
4966 }
4967
4968 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4969 int phymode, u16 channel)
4970 {
4971 int i;
4972
4973 switch (phymode) {
4974 case MODE_IEEE80211A:
4975 for (i = 14; i < priv->channel_count; i++) {
4976 if (priv->channel_info[i].channel == channel)
4977 return &priv->channel_info[i];
4978 }
4979 break;
4980
4981 case MODE_IEEE80211B:
4982 case MODE_IEEE80211G:
4983 if (channel >= 1 && channel <= 14)
4984 return &priv->channel_info[channel - 1];
4985 break;
4986
4987 }
4988
4989 return NULL;
4990 }
4991
4992 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4993 ? # x " " : "")
4994
4995 static int iwl_init_channel_map(struct iwl_priv *priv)
4996 {
4997 int eeprom_ch_count = 0;
4998 const u8 *eeprom_ch_index = NULL;
4999 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5000 int band, ch;
5001 struct iwl_channel_info *ch_info;
5002
5003 if (priv->channel_count) {
5004 IWL_DEBUG_INFO("Channel map already initialized.\n");
5005 return 0;
5006 }
5007
5008 if (priv->eeprom.version < 0x2f) {
5009 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5010 priv->eeprom.version);
5011 return -EINVAL;
5012 }
5013
5014 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5015
5016 priv->channel_count =
5017 ARRAY_SIZE(iwl_eeprom_band_1) +
5018 ARRAY_SIZE(iwl_eeprom_band_2) +
5019 ARRAY_SIZE(iwl_eeprom_band_3) +
5020 ARRAY_SIZE(iwl_eeprom_band_4) +
5021 ARRAY_SIZE(iwl_eeprom_band_5);
5022
5023 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5024
5025 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5026 priv->channel_count, GFP_KERNEL);
5027 if (!priv->channel_info) {
5028 IWL_ERROR("Could not allocate channel_info\n");
5029 priv->channel_count = 0;
5030 return -ENOMEM;
5031 }
5032
5033 ch_info = priv->channel_info;
5034
5035 /* Loop through the 5 EEPROM bands adding them in order to the
5036 * channel map we maintain (that contains additional information than
5037 * what just in the EEPROM) */
5038 for (band = 1; band <= 5; band++) {
5039
5040 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5041 &eeprom_ch_info, &eeprom_ch_index);
5042
5043 /* Loop through each band adding each of the channels */
5044 for (ch = 0; ch < eeprom_ch_count; ch++) {
5045 ch_info->channel = eeprom_ch_index[ch];
5046 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5047 MODE_IEEE80211A;
5048
5049 /* permanently store EEPROM's channel regulatory flags
5050 * and max power in channel info database. */
5051 ch_info->eeprom = eeprom_ch_info[ch];
5052
5053 /* Copy the run-time flags so they are there even on
5054 * invalid channels */
5055 ch_info->flags = eeprom_ch_info[ch].flags;
5056
5057 if (!(is_channel_valid(ch_info))) {
5058 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5059 "No traffic\n",
5060 ch_info->channel,
5061 ch_info->flags,
5062 is_channel_a_band(ch_info) ?
5063 "5.2" : "2.4");
5064 ch_info++;
5065 continue;
5066 }
5067
5068 /* Initialize regulatory-based run-time data */
5069 ch_info->max_power_avg = ch_info->curr_txpow =
5070 eeprom_ch_info[ch].max_power_avg;
5071 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5072 ch_info->min_power = 0;
5073
5074 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5075 " %ddBm): Ad-Hoc %ssupported\n",
5076 ch_info->channel,
5077 is_channel_a_band(ch_info) ?
5078 "5.2" : "2.4",
5079 CHECK_AND_PRINT(IBSS),
5080 CHECK_AND_PRINT(ACTIVE),
5081 CHECK_AND_PRINT(RADAR),
5082 CHECK_AND_PRINT(WIDE),
5083 CHECK_AND_PRINT(NARROW),
5084 CHECK_AND_PRINT(DFS),
5085 eeprom_ch_info[ch].flags,
5086 eeprom_ch_info[ch].max_power_avg,
5087 ((eeprom_ch_info[ch].
5088 flags & EEPROM_CHANNEL_IBSS)
5089 && !(eeprom_ch_info[ch].
5090 flags & EEPROM_CHANNEL_RADAR))
5091 ? "" : "not ");
5092
5093 /* Set the user_txpower_limit to the highest power
5094 * supported by any channel */
5095 if (eeprom_ch_info[ch].max_power_avg >
5096 priv->user_txpower_limit)
5097 priv->user_txpower_limit =
5098 eeprom_ch_info[ch].max_power_avg;
5099
5100 ch_info++;
5101 }
5102 }
5103
5104 if (iwl3945_txpower_set_from_eeprom(priv))
5105 return -EIO;
5106
5107 return 0;
5108 }
5109
5110 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5111 * sending probe req. This should be set long enough to hear probe responses
5112 * from more than one AP. */
5113 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5114 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5115
5116 /* For faster active scanning, scan will move to the next channel if fewer than
5117 * PLCP_QUIET_THRESH packets are heard on this channel within
5118 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5119 * time if it's a quiet channel (nothing responded to our probe, and there's
5120 * no other traffic).
5121 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5122 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5123 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5124
5125 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5126 * Must be set longer than active dwell time.
5127 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5128 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5129 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5130 #define IWL_PASSIVE_DWELL_BASE (100)
5131 #define IWL_CHANNEL_TUNE_TIME 5
5132
5133 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5134 {
5135 if (phymode == MODE_IEEE80211A)
5136 return IWL_ACTIVE_DWELL_TIME_52;
5137 else
5138 return IWL_ACTIVE_DWELL_TIME_24;
5139 }
5140
5141 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5142 {
5143 u16 active = iwl_get_active_dwell_time(priv, phymode);
5144 u16 passive = (phymode != MODE_IEEE80211A) ?
5145 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5146 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5147
5148 if (iwl_is_associated(priv)) {
5149 /* If we're associated, we clamp the maximum passive
5150 * dwell time to be 98% of the beacon interval (minus
5151 * 2 * channel tune time) */
5152 passive = priv->beacon_int;
5153 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5154 passive = IWL_PASSIVE_DWELL_BASE;
5155 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5156 }
5157
5158 if (passive <= active)
5159 passive = active + 1;
5160
5161 return passive;
5162 }
5163
5164 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5165 u8 is_active, u8 direct_mask,
5166 struct iwl_scan_channel *scan_ch)
5167 {
5168 const struct ieee80211_channel *channels = NULL;
5169 const struct ieee80211_hw_mode *hw_mode;
5170 const struct iwl_channel_info *ch_info;
5171 u16 passive_dwell = 0;
5172 u16 active_dwell = 0;
5173 int added, i;
5174
5175 hw_mode = iwl_get_hw_mode(priv, phymode);
5176 if (!hw_mode)
5177 return 0;
5178
5179 channels = hw_mode->channels;
5180
5181 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5182 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5183
5184 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5185 if (channels[i].chan ==
5186 le16_to_cpu(priv->active_rxon.channel)) {
5187 if (iwl_is_associated(priv)) {
5188 IWL_DEBUG_SCAN
5189 ("Skipping current channel %d\n",
5190 le16_to_cpu(priv->active_rxon.channel));
5191 continue;
5192 }
5193 } else if (priv->only_active_channel)
5194 continue;
5195
5196 scan_ch->channel = channels[i].chan;
5197
5198 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5199 if (!is_channel_valid(ch_info)) {
5200 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5201 scan_ch->channel);
5202 continue;
5203 }
5204
5205 if (!is_active || is_channel_passive(ch_info) ||
5206 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5207 scan_ch->type = 0; /* passive */
5208 else
5209 scan_ch->type = 1; /* active */
5210
5211 if (scan_ch->type & 1)
5212 scan_ch->type |= (direct_mask << 1);
5213
5214 if (is_channel_narrow(ch_info))
5215 scan_ch->type |= (1 << 7);
5216
5217 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5218 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5219
5220 /* Set power levels to defaults */
5221 scan_ch->tpc.dsp_atten = 110;
5222 /* scan_pwr_info->tpc.dsp_atten; */
5223
5224 /*scan_pwr_info->tpc.tx_gain; */
5225 if (phymode == MODE_IEEE80211A)
5226 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5227 else {
5228 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5229 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5230 * power level
5231 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5232 */
5233 }
5234
5235 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5236 scan_ch->channel,
5237 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5238 (scan_ch->type & 1) ?
5239 active_dwell : passive_dwell);
5240
5241 scan_ch++;
5242 added++;
5243 }
5244
5245 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5246 return added;
5247 }
5248
5249 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5250 {
5251 int i, j;
5252 for (i = 0; i < 3; i++) {
5253 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5254 for (j = 0; j < hw_mode->num_channels; j++)
5255 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5256 }
5257 }
5258
5259 static void iwl_init_hw_rates(struct iwl_priv *priv,
5260 struct ieee80211_rate *rates)
5261 {
5262 int i;
5263
5264 for (i = 0; i < IWL_RATE_COUNT; i++) {
5265 rates[i].rate = iwl_rates[i].ieee * 5;
5266 rates[i].val = i; /* Rate scaling will work on indexes */
5267 rates[i].val2 = i;
5268 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5269 /* Only OFDM have the bits-per-symbol set */
5270 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5271 rates[i].flags |= IEEE80211_RATE_OFDM;
5272 else {
5273 /*
5274 * If CCK 1M then set rate flag to CCK else CCK_2
5275 * which is CCK | PREAMBLE2
5276 */
5277 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5278 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5279 }
5280
5281 /* Set up which ones are basic rates... */
5282 if (IWL_BASIC_RATES_MASK & (1 << i))
5283 rates[i].flags |= IEEE80211_RATE_BASIC;
5284 }
5285 }
5286
5287 /**
5288 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5289 */
5290 static int iwl_init_geos(struct iwl_priv *priv)
5291 {
5292 struct iwl_channel_info *ch;
5293 struct ieee80211_hw_mode *modes;
5294 struct ieee80211_channel *channels;
5295 struct ieee80211_channel *geo_ch;
5296 struct ieee80211_rate *rates;
5297 int i = 0;
5298 enum {
5299 A = 0,
5300 B = 1,
5301 G = 2,
5302 };
5303 int mode_count = 3;
5304
5305 if (priv->modes) {
5306 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5307 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5308 return 0;
5309 }
5310
5311 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5312 GFP_KERNEL);
5313 if (!modes)
5314 return -ENOMEM;
5315
5316 channels = kzalloc(sizeof(struct ieee80211_channel) *
5317 priv->channel_count, GFP_KERNEL);
5318 if (!channels) {
5319 kfree(modes);
5320 return -ENOMEM;
5321 }
5322
5323 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5324 GFP_KERNEL);
5325 if (!rates) {
5326 kfree(modes);
5327 kfree(channels);
5328 return -ENOMEM;
5329 }
5330
5331 /* 0 = 802.11a
5332 * 1 = 802.11b
5333 * 2 = 802.11g
5334 */
5335
5336 /* 5.2GHz channels start after the 2.4GHz channels */
5337 modes[A].mode = MODE_IEEE80211A;
5338 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5339 modes[A].rates = &rates[4];
5340 modes[A].num_rates = 8; /* just OFDM */
5341 modes[A].num_channels = 0;
5342
5343 modes[B].mode = MODE_IEEE80211B;
5344 modes[B].channels = channels;
5345 modes[B].rates = rates;
5346 modes[B].num_rates = 4; /* just CCK */
5347 modes[B].num_channels = 0;
5348
5349 modes[G].mode = MODE_IEEE80211G;
5350 modes[G].channels = channels;
5351 modes[G].rates = rates;
5352 modes[G].num_rates = 12; /* OFDM & CCK */
5353 modes[G].num_channels = 0;
5354
5355 priv->ieee_channels = channels;
5356 priv->ieee_rates = rates;
5357
5358 iwl_init_hw_rates(priv, rates);
5359
5360 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5361 ch = &priv->channel_info[i];
5362
5363 if (!is_channel_valid(ch)) {
5364 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5365 "skipping.\n",
5366 ch->channel, is_channel_a_band(ch) ?
5367 "5.2" : "2.4");
5368 continue;
5369 }
5370
5371 if (is_channel_a_band(ch))
5372 geo_ch = &modes[A].channels[modes[A].num_channels++];
5373 else {
5374 geo_ch = &modes[B].channels[modes[B].num_channels++];
5375 modes[G].num_channels++;
5376 }
5377
5378 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5379 geo_ch->chan = ch->channel;
5380 geo_ch->power_level = ch->max_power_avg;
5381 geo_ch->antenna_max = 0xff;
5382
5383 if (is_channel_valid(ch)) {
5384 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5385 if (ch->flags & EEPROM_CHANNEL_IBSS)
5386 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5387
5388 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5389 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5390
5391 if (ch->flags & EEPROM_CHANNEL_RADAR)
5392 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5393
5394 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5395 priv->max_channel_txpower_limit =
5396 ch->max_power_avg;
5397 }
5398
5399 geo_ch->val = geo_ch->flag;
5400 }
5401
5402 if ((modes[A].num_channels == 0) && priv->is_abg) {
5403 printk(KERN_INFO DRV_NAME
5404 ": Incorrectly detected BG card as ABG. Please send "
5405 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5406 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5407 priv->is_abg = 0;
5408 }
5409
5410 printk(KERN_INFO DRV_NAME
5411 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5412 modes[G].num_channels, modes[A].num_channels);
5413
5414 /*
5415 * NOTE: We register these in preference of order -- the
5416 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5417 * a phymode based on rates or AP capabilities but seems to
5418 * configure it purely on if the channel being configured
5419 * is supported by a mode -- and the first match is taken
5420 */
5421
5422 if (modes[G].num_channels)
5423 ieee80211_register_hwmode(priv->hw, &modes[G]);
5424 if (modes[B].num_channels)
5425 ieee80211_register_hwmode(priv->hw, &modes[B]);
5426 if (modes[A].num_channels)
5427 ieee80211_register_hwmode(priv->hw, &modes[A]);
5428
5429 priv->modes = modes;
5430 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5431
5432 return 0;
5433 }
5434
5435 /******************************************************************************
5436 *
5437 * uCode download functions
5438 *
5439 ******************************************************************************/
5440
5441 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5442 {
5443 if (priv->ucode_code.v_addr != NULL) {
5444 pci_free_consistent(priv->pci_dev,
5445 priv->ucode_code.len,
5446 priv->ucode_code.v_addr,
5447 priv->ucode_code.p_addr);
5448 priv->ucode_code.v_addr = NULL;
5449 }
5450 if (priv->ucode_data.v_addr != NULL) {
5451 pci_free_consistent(priv->pci_dev,
5452 priv->ucode_data.len,
5453 priv->ucode_data.v_addr,
5454 priv->ucode_data.p_addr);
5455 priv->ucode_data.v_addr = NULL;
5456 }
5457 if (priv->ucode_data_backup.v_addr != NULL) {
5458 pci_free_consistent(priv->pci_dev,
5459 priv->ucode_data_backup.len,
5460 priv->ucode_data_backup.v_addr,
5461 priv->ucode_data_backup.p_addr);
5462 priv->ucode_data_backup.v_addr = NULL;
5463 }
5464 if (priv->ucode_init.v_addr != NULL) {
5465 pci_free_consistent(priv->pci_dev,
5466 priv->ucode_init.len,
5467 priv->ucode_init.v_addr,
5468 priv->ucode_init.p_addr);
5469 priv->ucode_init.v_addr = NULL;
5470 }
5471 if (priv->ucode_init_data.v_addr != NULL) {
5472 pci_free_consistent(priv->pci_dev,
5473 priv->ucode_init_data.len,
5474 priv->ucode_init_data.v_addr,
5475 priv->ucode_init_data.p_addr);
5476 priv->ucode_init_data.v_addr = NULL;
5477 }
5478 if (priv->ucode_boot.v_addr != NULL) {
5479 pci_free_consistent(priv->pci_dev,
5480 priv->ucode_boot.len,
5481 priv->ucode_boot.v_addr,
5482 priv->ucode_boot.p_addr);
5483 priv->ucode_boot.v_addr = NULL;
5484 }
5485 }
5486
5487 /**
5488 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5489 * looking at all data.
5490 */
5491 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5492 {
5493 u32 val;
5494 u32 save_len = len;
5495 int rc = 0;
5496 u32 errcnt;
5497
5498 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5499
5500 rc = iwl_grab_restricted_access(priv);
5501 if (rc)
5502 return rc;
5503
5504 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5505
5506 errcnt = 0;
5507 for (; len > 0; len -= sizeof(u32), image++) {
5508 /* read data comes through single port, auto-incr addr */
5509 /* NOTE: Use the debugless read so we don't flood kernel log
5510 * if IWL_DL_IO is set */
5511 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5512 if (val != le32_to_cpu(*image)) {
5513 IWL_ERROR("uCode INST section is invalid at "
5514 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5515 save_len - len, val, le32_to_cpu(*image));
5516 rc = -EIO;
5517 errcnt++;
5518 if (errcnt >= 20)
5519 break;
5520 }
5521 }
5522
5523 iwl_release_restricted_access(priv);
5524
5525 if (!errcnt)
5526 IWL_DEBUG_INFO
5527 ("ucode image in INSTRUCTION memory is good\n");
5528
5529 return rc;
5530 }
5531
5532
5533 /**
5534 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5535 * using sample data 100 bytes apart. If these sample points are good,
5536 * it's a pretty good bet that everything between them is good, too.
5537 */
5538 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5539 {
5540 u32 val;
5541 int rc = 0;
5542 u32 errcnt = 0;
5543 u32 i;
5544
5545 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5546
5547 rc = iwl_grab_restricted_access(priv);
5548 if (rc)
5549 return rc;
5550
5551 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5552 /* read data comes through single port, auto-incr addr */
5553 /* NOTE: Use the debugless read so we don't flood kernel log
5554 * if IWL_DL_IO is set */
5555 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5556 i + RTC_INST_LOWER_BOUND);
5557 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5558 if (val != le32_to_cpu(*image)) {
5559 #if 0 /* Enable this if you want to see details */
5560 IWL_ERROR("uCode INST section is invalid at "
5561 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5562 i, val, *image);
5563 #endif
5564 rc = -EIO;
5565 errcnt++;
5566 if (errcnt >= 3)
5567 break;
5568 }
5569 }
5570
5571 iwl_release_restricted_access(priv);
5572
5573 return rc;
5574 }
5575
5576
5577 /**
5578 * iwl_verify_ucode - determine which instruction image is in SRAM,
5579 * and verify its contents
5580 */
5581 static int iwl_verify_ucode(struct iwl_priv *priv)
5582 {
5583 __le32 *image;
5584 u32 len;
5585 int rc = 0;
5586
5587 /* Try bootstrap */
5588 image = (__le32 *)priv->ucode_boot.v_addr;
5589 len = priv->ucode_boot.len;
5590 rc = iwl_verify_inst_sparse(priv, image, len);
5591 if (rc == 0) {
5592 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5593 return 0;
5594 }
5595
5596 /* Try initialize */
5597 image = (__le32 *)priv->ucode_init.v_addr;
5598 len = priv->ucode_init.len;
5599 rc = iwl_verify_inst_sparse(priv, image, len);
5600 if (rc == 0) {
5601 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5602 return 0;
5603 }
5604
5605 /* Try runtime/protocol */
5606 image = (__le32 *)priv->ucode_code.v_addr;
5607 len = priv->ucode_code.len;
5608 rc = iwl_verify_inst_sparse(priv, image, len);
5609 if (rc == 0) {
5610 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5611 return 0;
5612 }
5613
5614 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5615
5616 /* Show first several data entries in instruction SRAM.
5617 * Selection of bootstrap image is arbitrary. */
5618 image = (__le32 *)priv->ucode_boot.v_addr;
5619 len = priv->ucode_boot.len;
5620 rc = iwl_verify_inst_full(priv, image, len);
5621
5622 return rc;
5623 }
5624
5625
5626 /* check contents of special bootstrap uCode SRAM */
5627 static int iwl_verify_bsm(struct iwl_priv *priv)
5628 {
5629 __le32 *image = priv->ucode_boot.v_addr;
5630 u32 len = priv->ucode_boot.len;
5631 u32 reg;
5632 u32 val;
5633
5634 IWL_DEBUG_INFO("Begin verify bsm\n");
5635
5636 /* verify BSM SRAM contents */
5637 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5638 for (reg = BSM_SRAM_LOWER_BOUND;
5639 reg < BSM_SRAM_LOWER_BOUND + len;
5640 reg += sizeof(u32), image ++) {
5641 val = iwl_read_restricted_reg(priv, reg);
5642 if (val != le32_to_cpu(*image)) {
5643 IWL_ERROR("BSM uCode verification failed at "
5644 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5645 BSM_SRAM_LOWER_BOUND,
5646 reg - BSM_SRAM_LOWER_BOUND, len,
5647 val, le32_to_cpu(*image));
5648 return -EIO;
5649 }
5650 }
5651
5652 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5653
5654 return 0;
5655 }
5656
5657 /**
5658 * iwl_load_bsm - Load bootstrap instructions
5659 *
5660 * BSM operation:
5661 *
5662 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5663 * in special SRAM that does not power down during RFKILL. When powering back
5664 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5665 * the bootstrap program into the on-board processor, and starts it.
5666 *
5667 * The bootstrap program loads (via DMA) instructions and data for a new
5668 * program from host DRAM locations indicated by the host driver in the
5669 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5670 * automatically.
5671 *
5672 * When initializing the NIC, the host driver points the BSM to the
5673 * "initialize" uCode image. This uCode sets up some internal data, then
5674 * notifies host via "initialize alive" that it is complete.
5675 *
5676 * The host then replaces the BSM_DRAM_* pointer values to point to the
5677 * normal runtime uCode instructions and a backup uCode data cache buffer
5678 * (filled initially with starting data values for the on-board processor),
5679 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5680 * which begins normal operation.
5681 *
5682 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5683 * the backup data cache in DRAM before SRAM is powered down.
5684 *
5685 * When powering back up, the BSM loads the bootstrap program. This reloads
5686 * the runtime uCode instructions and the backup data cache into SRAM,
5687 * and re-launches the runtime uCode from where it left off.
5688 */
5689 static int iwl_load_bsm(struct iwl_priv *priv)
5690 {
5691 __le32 *image = priv->ucode_boot.v_addr;
5692 u32 len = priv->ucode_boot.len;
5693 dma_addr_t pinst;
5694 dma_addr_t pdata;
5695 u32 inst_len;
5696 u32 data_len;
5697 int rc;
5698 int i;
5699 u32 done;
5700 u32 reg_offset;
5701
5702 IWL_DEBUG_INFO("Begin load bsm\n");
5703
5704 /* make sure bootstrap program is no larger than BSM's SRAM size */
5705 if (len > IWL_MAX_BSM_SIZE)
5706 return -EINVAL;
5707
5708 /* Tell bootstrap uCode where to find the "Initialize" uCode
5709 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5710 * NOTE: iwl_initialize_alive_start() will replace these values,
5711 * after the "initialize" uCode has run, to point to
5712 * runtime/protocol instructions and backup data cache. */
5713 pinst = priv->ucode_init.p_addr;
5714 pdata = priv->ucode_init_data.p_addr;
5715 inst_len = priv->ucode_init.len;
5716 data_len = priv->ucode_init_data.len;
5717
5718 rc = iwl_grab_restricted_access(priv);
5719 if (rc)
5720 return rc;
5721
5722 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5723 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5724 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5725 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5726
5727 /* Fill BSM memory with bootstrap instructions */
5728 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5729 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5730 reg_offset += sizeof(u32), image++)
5731 _iwl_write_restricted_reg(priv, reg_offset,
5732 le32_to_cpu(*image));
5733
5734 rc = iwl_verify_bsm(priv);
5735 if (rc) {
5736 iwl_release_restricted_access(priv);
5737 return rc;
5738 }
5739
5740 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5741 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5742 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5743 RTC_INST_LOWER_BOUND);
5744 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5745
5746 /* Load bootstrap code into instruction SRAM now,
5747 * to prepare to load "initialize" uCode */
5748 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5749 BSM_WR_CTRL_REG_BIT_START);
5750
5751 /* Wait for load of bootstrap uCode to finish */
5752 for (i = 0; i < 100; i++) {
5753 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5754 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5755 break;
5756 udelay(10);
5757 }
5758 if (i < 100)
5759 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5760 else {
5761 IWL_ERROR("BSM write did not complete!\n");
5762 return -EIO;
5763 }
5764
5765 /* Enable future boot loads whenever power management unit triggers it
5766 * (e.g. when powering back up after power-save shutdown) */
5767 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5768 BSM_WR_CTRL_REG_BIT_START_EN);
5769
5770 iwl_release_restricted_access(priv);
5771
5772 return 0;
5773 }
5774
5775 static void iwl_nic_start(struct iwl_priv *priv)
5776 {
5777 /* Remove all resets to allow NIC to operate */
5778 iwl_write32(priv, CSR_RESET, 0);
5779 }
5780
5781 /**
5782 * iwl_read_ucode - Read uCode images from disk file.
5783 *
5784 * Copy into buffers for card to fetch via bus-mastering
5785 */
5786 static int iwl_read_ucode(struct iwl_priv *priv)
5787 {
5788 struct iwl_ucode *ucode;
5789 int rc = 0;
5790 const struct firmware *ucode_raw;
5791 /* firmware file name contains uCode/driver compatibility version */
5792 const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5793 u8 *src;
5794 size_t len;
5795 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5796
5797 /* Ask kernel firmware_class module to get the boot firmware off disk.
5798 * request_firmware() is synchronous, file is in memory on return. */
5799 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5800 if (rc < 0) {
5801 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5802 goto error;
5803 }
5804
5805 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5806 name, ucode_raw->size);
5807
5808 /* Make sure that we got at least our header! */
5809 if (ucode_raw->size < sizeof(*ucode)) {
5810 IWL_ERROR("File size way too small!\n");
5811 rc = -EINVAL;
5812 goto err_release;
5813 }
5814
5815 /* Data from ucode file: header followed by uCode images */
5816 ucode = (void *)ucode_raw->data;
5817
5818 ver = le32_to_cpu(ucode->ver);
5819 inst_size = le32_to_cpu(ucode->inst_size);
5820 data_size = le32_to_cpu(ucode->data_size);
5821 init_size = le32_to_cpu(ucode->init_size);
5822 init_data_size = le32_to_cpu(ucode->init_data_size);
5823 boot_size = le32_to_cpu(ucode->boot_size);
5824
5825 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5826 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5827 inst_size);
5828 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5829 data_size);
5830 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5831 init_size);
5832 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5833 init_data_size);
5834 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5835 boot_size);
5836
5837 /* Verify size of file vs. image size info in file's header */
5838 if (ucode_raw->size < sizeof(*ucode) +
5839 inst_size + data_size + init_size +
5840 init_data_size + boot_size) {
5841
5842 IWL_DEBUG_INFO("uCode file size %d too small\n",
5843 (int)ucode_raw->size);
5844 rc = -EINVAL;
5845 goto err_release;
5846 }
5847
5848 /* Verify that uCode images will fit in card's SRAM */
5849 if (inst_size > IWL_MAX_INST_SIZE) {
5850 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5851 (int)inst_size);
5852 rc = -EINVAL;
5853 goto err_release;
5854 }
5855
5856 if (data_size > IWL_MAX_DATA_SIZE) {
5857 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5858 (int)data_size);
5859 rc = -EINVAL;
5860 goto err_release;
5861 }
5862 if (init_size > IWL_MAX_INST_SIZE) {
5863 IWL_DEBUG_INFO
5864 ("uCode init instr len %d too large to fit in card\n",
5865 (int)init_size);
5866 rc = -EINVAL;
5867 goto err_release;
5868 }
5869 if (init_data_size > IWL_MAX_DATA_SIZE) {
5870 IWL_DEBUG_INFO
5871 ("uCode init data len %d too large to fit in card\n",
5872 (int)init_data_size);
5873 rc = -EINVAL;
5874 goto err_release;
5875 }
5876 if (boot_size > IWL_MAX_BSM_SIZE) {
5877 IWL_DEBUG_INFO
5878 ("uCode boot instr len %d too large to fit in bsm\n",
5879 (int)boot_size);
5880 rc = -EINVAL;
5881 goto err_release;
5882 }
5883
5884 /* Allocate ucode buffers for card's bus-master loading ... */
5885
5886 /* Runtime instructions and 2 copies of data:
5887 * 1) unmodified from disk
5888 * 2) backup cache for save/restore during power-downs */
5889 priv->ucode_code.len = inst_size;
5890 priv->ucode_code.v_addr =
5891 pci_alloc_consistent(priv->pci_dev,
5892 priv->ucode_code.len,
5893 &(priv->ucode_code.p_addr));
5894
5895 priv->ucode_data.len = data_size;
5896 priv->ucode_data.v_addr =
5897 pci_alloc_consistent(priv->pci_dev,
5898 priv->ucode_data.len,
5899 &(priv->ucode_data.p_addr));
5900
5901 priv->ucode_data_backup.len = data_size;
5902 priv->ucode_data_backup.v_addr =
5903 pci_alloc_consistent(priv->pci_dev,
5904 priv->ucode_data_backup.len,
5905 &(priv->ucode_data_backup.p_addr));
5906
5907
5908 /* Initialization instructions and data */
5909 priv->ucode_init.len = init_size;
5910 priv->ucode_init.v_addr =
5911 pci_alloc_consistent(priv->pci_dev,
5912 priv->ucode_init.len,
5913 &(priv->ucode_init.p_addr));
5914
5915 priv->ucode_init_data.len = init_data_size;
5916 priv->ucode_init_data.v_addr =
5917 pci_alloc_consistent(priv->pci_dev,
5918 priv->ucode_init_data.len,
5919 &(priv->ucode_init_data.p_addr));
5920
5921 /* Bootstrap (instructions only, no data) */
5922 priv->ucode_boot.len = boot_size;
5923 priv->ucode_boot.v_addr =
5924 pci_alloc_consistent(priv->pci_dev,
5925 priv->ucode_boot.len,
5926 &(priv->ucode_boot.p_addr));
5927
5928 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5929 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5930 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5931 goto err_pci_alloc;
5932
5933 /* Copy images into buffers for card's bus-master reads ... */
5934
5935 /* Runtime instructions (first block of data in file) */
5936 src = &ucode->data[0];
5937 len = priv->ucode_code.len;
5938 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5939 (int)len);
5940 memcpy(priv->ucode_code.v_addr, src, len);
5941 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5942 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5943
5944 /* Runtime data (2nd block)
5945 * NOTE: Copy into backup buffer will be done in iwl_up() */
5946 src = &ucode->data[inst_size];
5947 len = priv->ucode_data.len;
5948 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5949 (int)len);
5950 memcpy(priv->ucode_data.v_addr, src, len);
5951 memcpy(priv->ucode_data_backup.v_addr, src, len);
5952
5953 /* Initialization instructions (3rd block) */
5954 if (init_size) {
5955 src = &ucode->data[inst_size + data_size];
5956 len = priv->ucode_init.len;
5957 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5958 (int)len);
5959 memcpy(priv->ucode_init.v_addr, src, len);
5960 }
5961
5962 /* Initialization data (4th block) */
5963 if (init_data_size) {
5964 src = &ucode->data[inst_size + data_size + init_size];
5965 len = priv->ucode_init_data.len;
5966 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5967 (int)len);
5968 memcpy(priv->ucode_init_data.v_addr, src, len);
5969 }
5970
5971 /* Bootstrap instructions (5th block) */
5972 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5973 len = priv->ucode_boot.len;
5974 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5975 (int)len);
5976 memcpy(priv->ucode_boot.v_addr, src, len);
5977
5978 /* We have our copies now, allow OS release its copies */
5979 release_firmware(ucode_raw);
5980 return 0;
5981
5982 err_pci_alloc:
5983 IWL_ERROR("failed to allocate pci memory\n");
5984 rc = -ENOMEM;
5985 iwl_dealloc_ucode_pci(priv);
5986
5987 err_release:
5988 release_firmware(ucode_raw);
5989
5990 error:
5991 return rc;
5992 }
5993
5994
5995 /**
5996 * iwl_set_ucode_ptrs - Set uCode address location
5997 *
5998 * Tell initialization uCode where to find runtime uCode.
5999 *
6000 * BSM registers initially contain pointers to initialization uCode.
6001 * We need to replace them to load runtime uCode inst and data,
6002 * and to save runtime data when powering down.
6003 */
6004 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6005 {
6006 dma_addr_t pinst;
6007 dma_addr_t pdata;
6008 int rc = 0;
6009 unsigned long flags;
6010
6011 /* bits 31:0 for 3945 */
6012 pinst = priv->ucode_code.p_addr;
6013 pdata = priv->ucode_data_backup.p_addr;
6014
6015 spin_lock_irqsave(&priv->lock, flags);
6016 rc = iwl_grab_restricted_access(priv);
6017 if (rc) {
6018 spin_unlock_irqrestore(&priv->lock, flags);
6019 return rc;
6020 }
6021
6022 /* Tell bootstrap uCode where to find image to load */
6023 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6024 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6025 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6026 priv->ucode_data.len);
6027
6028 /* Inst bytecount must be last to set up, bit 31 signals uCode
6029 * that all new ptr/size info is in place */
6030 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6031 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6032
6033 iwl_release_restricted_access(priv);
6034
6035 spin_unlock_irqrestore(&priv->lock, flags);
6036
6037 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6038
6039 return rc;
6040 }
6041
6042 /**
6043 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6044 *
6045 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6046 *
6047 * The 4965 "initialize" ALIVE reply contains calibration data for:
6048 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6049 * (3945 does not contain this data).
6050 *
6051 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6052 */
6053 static void iwl_init_alive_start(struct iwl_priv *priv)
6054 {
6055 /* Check alive response for "valid" sign from uCode */
6056 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6057 /* We had an error bringing up the hardware, so take it
6058 * all the way back down so we can try again */
6059 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6060 goto restart;
6061 }
6062
6063 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6064 * This is a paranoid check, because we would not have gotten the
6065 * "initialize" alive if code weren't properly loaded. */
6066 if (iwl_verify_ucode(priv)) {
6067 /* Runtime instruction load was bad;
6068 * take it all the way back down so we can try again */
6069 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6070 goto restart;
6071 }
6072
6073 /* Send pointers to protocol/runtime uCode image ... init code will
6074 * load and launch runtime uCode, which will send us another "Alive"
6075 * notification. */
6076 IWL_DEBUG_INFO("Initialization Alive received.\n");
6077 if (iwl_set_ucode_ptrs(priv)) {
6078 /* Runtime instruction load won't happen;
6079 * take it all the way back down so we can try again */
6080 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6081 goto restart;
6082 }
6083 return;
6084
6085 restart:
6086 queue_work(priv->workqueue, &priv->restart);
6087 }
6088
6089
6090 /**
6091 * iwl_alive_start - called after REPLY_ALIVE notification received
6092 * from protocol/runtime uCode (initialization uCode's
6093 * Alive gets handled by iwl_init_alive_start()).
6094 */
6095 static void iwl_alive_start(struct iwl_priv *priv)
6096 {
6097 int rc = 0;
6098 int thermal_spin = 0;
6099 u32 rfkill;
6100
6101 IWL_DEBUG_INFO("Runtime Alive received.\n");
6102
6103 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6104 /* We had an error bringing up the hardware, so take it
6105 * all the way back down so we can try again */
6106 IWL_DEBUG_INFO("Alive failed.\n");
6107 goto restart;
6108 }
6109
6110 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6111 * This is a paranoid check, because we would not have gotten the
6112 * "runtime" alive if code weren't properly loaded. */
6113 if (iwl_verify_ucode(priv)) {
6114 /* Runtime instruction load was bad;
6115 * take it all the way back down so we can try again */
6116 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6117 goto restart;
6118 }
6119
6120 iwl_clear_stations_table(priv);
6121
6122 rc = iwl_grab_restricted_access(priv);
6123 if (rc) {
6124 IWL_WARNING("Can not read rfkill status from adapter\n");
6125 return;
6126 }
6127
6128 rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6129 IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6130 iwl_release_restricted_access(priv);
6131
6132 if (rfkill & 0x1) {
6133 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6134 /* if rfkill is not on, then wait for thermal
6135 * sensor in adapter to kick in */
6136 while (iwl_hw_get_temperature(priv) == 0) {
6137 thermal_spin++;
6138 udelay(10);
6139 }
6140
6141 if (thermal_spin)
6142 IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6143 thermal_spin * 10);
6144 } else
6145 set_bit(STATUS_RF_KILL_HW, &priv->status);
6146
6147 /* After the ALIVE response, we can process host commands */
6148 set_bit(STATUS_ALIVE, &priv->status);
6149
6150 /* Clear out the uCode error bit if it is set */
6151 clear_bit(STATUS_FW_ERROR, &priv->status);
6152
6153 rc = iwl_init_channel_map(priv);
6154 if (rc) {
6155 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6156 return;
6157 }
6158
6159 iwl_init_geos(priv);
6160
6161 if (iwl_is_rfkill(priv))
6162 return;
6163
6164 if (!priv->mac80211_registered) {
6165 /* Unlock so any user space entry points can call back into
6166 * the driver without a deadlock... */
6167 mutex_unlock(&priv->mutex);
6168 iwl_rate_control_register(priv->hw);
6169 rc = ieee80211_register_hw(priv->hw);
6170 priv->hw->conf.beacon_int = 100;
6171 mutex_lock(&priv->mutex);
6172
6173 if (rc) {
6174 IWL_ERROR("Failed to register network "
6175 "device (error %d)\n", rc);
6176 return;
6177 }
6178
6179 priv->mac80211_registered = 1;
6180
6181 iwl_reset_channel_flag(priv);
6182 } else
6183 ieee80211_start_queues(priv->hw);
6184
6185 priv->active_rate = priv->rates_mask;
6186 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6187
6188 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6189
6190 if (iwl_is_associated(priv)) {
6191 struct iwl_rxon_cmd *active_rxon =
6192 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6193
6194 memcpy(&priv->staging_rxon, &priv->active_rxon,
6195 sizeof(priv->staging_rxon));
6196 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6197 } else {
6198 /* Initialize our rx_config data */
6199 iwl_connection_init_rx_config(priv);
6200 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6201 }
6202
6203 /* Configure BT coexistence */
6204 iwl_send_bt_config(priv);
6205
6206 /* Configure the adapter for unassociated operation */
6207 iwl_commit_rxon(priv);
6208
6209 /* At this point, the NIC is initialized and operational */
6210 priv->notif_missed_beacons = 0;
6211 set_bit(STATUS_READY, &priv->status);
6212
6213 iwl3945_reg_txpower_periodic(priv);
6214
6215 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6216
6217 if (priv->error_recovering)
6218 iwl_error_recovery(priv);
6219
6220 return;
6221
6222 restart:
6223 queue_work(priv->workqueue, &priv->restart);
6224 }
6225
6226 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6227
6228 static void __iwl_down(struct iwl_priv *priv)
6229 {
6230 unsigned long flags;
6231 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6232 struct ieee80211_conf *conf = NULL;
6233
6234 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6235
6236 conf = ieee80211_get_hw_conf(priv->hw);
6237
6238 if (!exit_pending)
6239 set_bit(STATUS_EXIT_PENDING, &priv->status);
6240
6241 iwl_clear_stations_table(priv);
6242
6243 /* Unblock any waiting calls */
6244 wake_up_interruptible_all(&priv->wait_command_queue);
6245
6246 iwl_cancel_deferred_work(priv);
6247
6248 /* Wipe out the EXIT_PENDING status bit if we are not actually
6249 * exiting the module */
6250 if (!exit_pending)
6251 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6252
6253 /* stop and reset the on-board processor */
6254 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6255
6256 /* tell the device to stop sending interrupts */
6257 iwl_disable_interrupts(priv);
6258
6259 if (priv->mac80211_registered)
6260 ieee80211_stop_queues(priv->hw);
6261
6262 /* If we have not previously called iwl_init() then
6263 * clear all bits but the RF Kill and SUSPEND bits and return */
6264 if (!iwl_is_init(priv)) {
6265 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6266 STATUS_RF_KILL_HW |
6267 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6268 STATUS_RF_KILL_SW |
6269 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6270 STATUS_IN_SUSPEND;
6271 goto exit;
6272 }
6273
6274 /* ...otherwise clear out all the status bits but the RF Kill and
6275 * SUSPEND bits and continue taking the NIC down. */
6276 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6277 STATUS_RF_KILL_HW |
6278 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6279 STATUS_RF_KILL_SW |
6280 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6281 STATUS_IN_SUSPEND |
6282 test_bit(STATUS_FW_ERROR, &priv->status) <<
6283 STATUS_FW_ERROR;
6284
6285 spin_lock_irqsave(&priv->lock, flags);
6286 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6287 spin_unlock_irqrestore(&priv->lock, flags);
6288
6289 iwl_hw_txq_ctx_stop(priv);
6290 iwl_hw_rxq_stop(priv);
6291
6292 spin_lock_irqsave(&priv->lock, flags);
6293 if (!iwl_grab_restricted_access(priv)) {
6294 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6295 APMG_CLK_VAL_DMA_CLK_RQT);
6296 iwl_release_restricted_access(priv);
6297 }
6298 spin_unlock_irqrestore(&priv->lock, flags);
6299
6300 udelay(5);
6301
6302 iwl_hw_nic_stop_master(priv);
6303 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6304 iwl_hw_nic_reset(priv);
6305
6306 exit:
6307 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6308
6309 if (priv->ibss_beacon)
6310 dev_kfree_skb(priv->ibss_beacon);
6311 priv->ibss_beacon = NULL;
6312
6313 /* clear out any free frames */
6314 iwl_clear_free_frames(priv);
6315 }
6316
6317 static void iwl_down(struct iwl_priv *priv)
6318 {
6319 mutex_lock(&priv->mutex);
6320 __iwl_down(priv);
6321 mutex_unlock(&priv->mutex);
6322 }
6323
6324 #define MAX_HW_RESTARTS 5
6325
6326 static int __iwl_up(struct iwl_priv *priv)
6327 {
6328 DECLARE_MAC_BUF(mac);
6329 int rc, i;
6330
6331 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6332 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6333 return -EIO;
6334 }
6335
6336 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6337 IWL_WARNING("Radio disabled by SW RF kill (module "
6338 "parameter)\n");
6339 return 0;
6340 }
6341
6342 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6343
6344 rc = iwl_hw_nic_init(priv);
6345 if (rc) {
6346 IWL_ERROR("Unable to int nic\n");
6347 return rc;
6348 }
6349
6350 /* make sure rfkill handshake bits are cleared */
6351 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6352 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6353 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6354
6355 /* clear (again), then enable host interrupts */
6356 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6357 iwl_enable_interrupts(priv);
6358
6359 /* really make sure rfkill handshake bits are cleared */
6360 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6361 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6362
6363 /* Copy original ucode data image from disk into backup cache.
6364 * This will be used to initialize the on-board processor's
6365 * data SRAM for a clean start when the runtime program first loads. */
6366 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6367 priv->ucode_data.len);
6368
6369 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6370
6371 iwl_clear_stations_table(priv);
6372
6373 /* load bootstrap state machine,
6374 * load bootstrap program into processor's memory,
6375 * prepare to load the "initialize" uCode */
6376 rc = iwl_load_bsm(priv);
6377
6378 if (rc) {
6379 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6380 continue;
6381 }
6382
6383 /* start card; "initialize" will load runtime ucode */
6384 iwl_nic_start(priv);
6385
6386 /* MAC Address location in EEPROM same for 3945/4965 */
6387 get_eeprom_mac(priv, priv->mac_addr);
6388 IWL_DEBUG_INFO("MAC address: %s\n",
6389 print_mac(mac, priv->mac_addr));
6390
6391 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6392
6393 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6394
6395 return 0;
6396 }
6397
6398 set_bit(STATUS_EXIT_PENDING, &priv->status);
6399 __iwl_down(priv);
6400
6401 /* tried to restart and config the device for as long as our
6402 * patience could withstand */
6403 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6404 return -EIO;
6405 }
6406
6407
6408 /*****************************************************************************
6409 *
6410 * Workqueue callbacks
6411 *
6412 *****************************************************************************/
6413
6414 static void iwl_bg_init_alive_start(struct work_struct *data)
6415 {
6416 struct iwl_priv *priv =
6417 container_of(data, struct iwl_priv, init_alive_start.work);
6418
6419 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6420 return;
6421
6422 mutex_lock(&priv->mutex);
6423 iwl_init_alive_start(priv);
6424 mutex_unlock(&priv->mutex);
6425 }
6426
6427 static void iwl_bg_alive_start(struct work_struct *data)
6428 {
6429 struct iwl_priv *priv =
6430 container_of(data, struct iwl_priv, alive_start.work);
6431
6432 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6433 return;
6434
6435 mutex_lock(&priv->mutex);
6436 iwl_alive_start(priv);
6437 mutex_unlock(&priv->mutex);
6438 }
6439
6440 static void iwl_bg_rf_kill(struct work_struct *work)
6441 {
6442 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6443
6444 wake_up_interruptible(&priv->wait_command_queue);
6445
6446 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6447 return;
6448
6449 mutex_lock(&priv->mutex);
6450
6451 if (!iwl_is_rfkill(priv)) {
6452 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6453 "HW and/or SW RF Kill no longer active, restarting "
6454 "device\n");
6455 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6456 queue_work(priv->workqueue, &priv->restart);
6457 } else {
6458
6459 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6460 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6461 "disabled by SW switch\n");
6462 else
6463 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6464 "Kill switch must be turned off for "
6465 "wireless networking to work.\n");
6466 }
6467 mutex_unlock(&priv->mutex);
6468 }
6469
6470 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6471
6472 static void iwl_bg_scan_check(struct work_struct *data)
6473 {
6474 struct iwl_priv *priv =
6475 container_of(data, struct iwl_priv, scan_check.work);
6476
6477 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6478 return;
6479
6480 mutex_lock(&priv->mutex);
6481 if (test_bit(STATUS_SCANNING, &priv->status) ||
6482 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6483 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6484 "Scan completion watchdog resetting adapter (%dms)\n",
6485 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6486
6487 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6488 iwl_send_scan_abort(priv);
6489 }
6490 mutex_unlock(&priv->mutex);
6491 }
6492
6493 static void iwl_bg_request_scan(struct work_struct *data)
6494 {
6495 struct iwl_priv *priv =
6496 container_of(data, struct iwl_priv, request_scan);
6497 struct iwl_host_cmd cmd = {
6498 .id = REPLY_SCAN_CMD,
6499 .len = sizeof(struct iwl_scan_cmd),
6500 .meta.flags = CMD_SIZE_HUGE,
6501 };
6502 int rc = 0;
6503 struct iwl_scan_cmd *scan;
6504 struct ieee80211_conf *conf = NULL;
6505 u8 direct_mask;
6506 int phymode;
6507
6508 conf = ieee80211_get_hw_conf(priv->hw);
6509
6510 mutex_lock(&priv->mutex);
6511
6512 if (!iwl_is_ready(priv)) {
6513 IWL_WARNING("request scan called when driver not ready.\n");
6514 goto done;
6515 }
6516
6517 /* Make sure the scan wasn't cancelled before this queued work
6518 * was given the chance to run... */
6519 if (!test_bit(STATUS_SCANNING, &priv->status))
6520 goto done;
6521
6522 /* This should never be called or scheduled if there is currently
6523 * a scan active in the hardware. */
6524 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6525 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6526 "Ignoring second request.\n");
6527 rc = -EIO;
6528 goto done;
6529 }
6530
6531 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6532 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6533 goto done;
6534 }
6535
6536 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6537 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6538 goto done;
6539 }
6540
6541 if (iwl_is_rfkill(priv)) {
6542 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6543 goto done;
6544 }
6545
6546 if (!test_bit(STATUS_READY, &priv->status)) {
6547 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6548 goto done;
6549 }
6550
6551 if (!priv->scan_bands) {
6552 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6553 goto done;
6554 }
6555
6556 if (!priv->scan) {
6557 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6558 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6559 if (!priv->scan) {
6560 rc = -ENOMEM;
6561 goto done;
6562 }
6563 }
6564 scan = priv->scan;
6565 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6566
6567 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6568 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6569
6570 if (iwl_is_associated(priv)) {
6571 u16 interval = 0;
6572 u32 extra;
6573 u32 suspend_time = 100;
6574 u32 scan_suspend_time = 100;
6575 unsigned long flags;
6576
6577 IWL_DEBUG_INFO("Scanning while associated...\n");
6578
6579 spin_lock_irqsave(&priv->lock, flags);
6580 interval = priv->beacon_int;
6581 spin_unlock_irqrestore(&priv->lock, flags);
6582
6583 scan->suspend_time = 0;
6584 scan->max_out_time = cpu_to_le32(200 * 1024);
6585 if (!interval)
6586 interval = suspend_time;
6587 /*
6588 * suspend time format:
6589 * 0-19: beacon interval in usec (time before exec.)
6590 * 20-23: 0
6591 * 24-31: number of beacons (suspend between channels)
6592 */
6593
6594 extra = (suspend_time / interval) << 24;
6595 scan_suspend_time = 0xFF0FFFFF &
6596 (extra | ((suspend_time % interval) * 1024));
6597
6598 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6599 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6600 scan_suspend_time, interval);
6601 }
6602
6603 /* We should add the ability for user to lock to PASSIVE ONLY */
6604 if (priv->one_direct_scan) {
6605 IWL_DEBUG_SCAN
6606 ("Kicking off one direct scan for '%s'\n",
6607 iwl_escape_essid(priv->direct_ssid,
6608 priv->direct_ssid_len));
6609 scan->direct_scan[0].id = WLAN_EID_SSID;
6610 scan->direct_scan[0].len = priv->direct_ssid_len;
6611 memcpy(scan->direct_scan[0].ssid,
6612 priv->direct_ssid, priv->direct_ssid_len);
6613 direct_mask = 1;
6614 } else if (!iwl_is_associated(priv) && priv->essid_len) {
6615 scan->direct_scan[0].id = WLAN_EID_SSID;
6616 scan->direct_scan[0].len = priv->essid_len;
6617 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6618 direct_mask = 1;
6619 } else
6620 direct_mask = 0;
6621
6622 /* We don't build a direct scan probe request; the uCode will do
6623 * that based on the direct_mask added to each channel entry */
6624 scan->tx_cmd.len = cpu_to_le16(
6625 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6626 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6627 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6628 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6629 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6630
6631 /* flags + rate selection */
6632
6633 switch (priv->scan_bands) {
6634 case 2:
6635 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6636 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6637 scan->good_CRC_th = 0;
6638 phymode = MODE_IEEE80211G;
6639 break;
6640
6641 case 1:
6642 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6643 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6644 phymode = MODE_IEEE80211A;
6645 break;
6646
6647 default:
6648 IWL_WARNING("Invalid scan band count\n");
6649 goto done;
6650 }
6651
6652 /* select Rx antennas */
6653 scan->flags |= iwl3945_get_antenna_flags(priv);
6654
6655 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6656 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6657
6658 if (direct_mask)
6659 IWL_DEBUG_SCAN
6660 ("Initiating direct scan for %s.\n",
6661 iwl_escape_essid(priv->essid, priv->essid_len));
6662 else
6663 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6664
6665 scan->channel_count =
6666 iwl_get_channels_for_scan(
6667 priv, phymode, 1, /* active */
6668 direct_mask,
6669 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6670
6671 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6672 scan->channel_count * sizeof(struct iwl_scan_channel);
6673 cmd.data = scan;
6674 scan->len = cpu_to_le16(cmd.len);
6675
6676 set_bit(STATUS_SCAN_HW, &priv->status);
6677 rc = iwl_send_cmd_sync(priv, &cmd);
6678 if (rc)
6679 goto done;
6680
6681 queue_delayed_work(priv->workqueue, &priv->scan_check,
6682 IWL_SCAN_CHECK_WATCHDOG);
6683
6684 mutex_unlock(&priv->mutex);
6685 return;
6686
6687 done:
6688 /* inform mac80211 sacn aborted */
6689 queue_work(priv->workqueue, &priv->scan_completed);
6690 mutex_unlock(&priv->mutex);
6691 }
6692
6693 static void iwl_bg_up(struct work_struct *data)
6694 {
6695 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6696
6697 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6698 return;
6699
6700 mutex_lock(&priv->mutex);
6701 __iwl_up(priv);
6702 mutex_unlock(&priv->mutex);
6703 }
6704
6705 static void iwl_bg_restart(struct work_struct *data)
6706 {
6707 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6708
6709 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6710 return;
6711
6712 iwl_down(priv);
6713 queue_work(priv->workqueue, &priv->up);
6714 }
6715
6716 static void iwl_bg_rx_replenish(struct work_struct *data)
6717 {
6718 struct iwl_priv *priv =
6719 container_of(data, struct iwl_priv, rx_replenish);
6720
6721 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6722 return;
6723
6724 mutex_lock(&priv->mutex);
6725 iwl_rx_replenish(priv);
6726 mutex_unlock(&priv->mutex);
6727 }
6728
6729 static void iwl_bg_post_associate(struct work_struct *data)
6730 {
6731 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6732 post_associate.work);
6733
6734 int rc = 0;
6735 struct ieee80211_conf *conf = NULL;
6736 DECLARE_MAC_BUF(mac);
6737
6738 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6739 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6740 return;
6741 }
6742
6743
6744 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6745 priv->assoc_id,
6746 print_mac(mac, priv->active_rxon.bssid_addr));
6747
6748 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6749 return;
6750
6751 mutex_lock(&priv->mutex);
6752
6753 if (!priv->interface_id || !priv->is_open) {
6754 mutex_unlock(&priv->mutex);
6755 return;
6756 }
6757 iwl_scan_cancel_timeout(priv, 200);
6758
6759 conf = ieee80211_get_hw_conf(priv->hw);
6760
6761 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6762 iwl_commit_rxon(priv);
6763
6764 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6765 iwl_setup_rxon_timing(priv);
6766 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6767 sizeof(priv->rxon_timing), &priv->rxon_timing);
6768 if (rc)
6769 IWL_WARNING("REPLY_RXON_TIMING failed - "
6770 "Attempting to continue.\n");
6771
6772 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6773
6774 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6775
6776 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6777 priv->assoc_id, priv->beacon_int);
6778
6779 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6780 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6781 else
6782 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6783
6784 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6785 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6786 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6787 else
6788 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6789
6790 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6791 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6792
6793 }
6794
6795 iwl_commit_rxon(priv);
6796
6797 switch (priv->iw_mode) {
6798 case IEEE80211_IF_TYPE_STA:
6799 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6800 break;
6801
6802 case IEEE80211_IF_TYPE_IBSS:
6803
6804 /* clear out the station table */
6805 iwl_clear_stations_table(priv);
6806
6807 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6808 iwl_add_station(priv, priv->bssid, 0, 0);
6809 iwl3945_sync_sta(priv, IWL_STA_ID,
6810 (priv->phymode == MODE_IEEE80211A)?
6811 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6812 CMD_ASYNC);
6813 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6814 iwl_send_beacon_cmd(priv);
6815
6816 break;
6817
6818 default:
6819 IWL_ERROR("%s Should not be called in %d mode\n",
6820 __FUNCTION__, priv->iw_mode);
6821 break;
6822 }
6823
6824 iwl_sequence_reset(priv);
6825
6826 #ifdef CONFIG_IWLWIFI_QOS
6827 iwl_activate_qos(priv, 0);
6828 #endif /* CONFIG_IWLWIFI_QOS */
6829 mutex_unlock(&priv->mutex);
6830 }
6831
6832 static void iwl_bg_abort_scan(struct work_struct *work)
6833 {
6834 struct iwl_priv *priv = container_of(work, struct iwl_priv,
6835 abort_scan);
6836
6837 if (!iwl_is_ready(priv))
6838 return;
6839
6840 mutex_lock(&priv->mutex);
6841
6842 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6843 iwl_send_scan_abort(priv);
6844
6845 mutex_unlock(&priv->mutex);
6846 }
6847
6848 static void iwl_bg_scan_completed(struct work_struct *work)
6849 {
6850 struct iwl_priv *priv =
6851 container_of(work, struct iwl_priv, scan_completed);
6852
6853 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6854
6855 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6856 return;
6857
6858 ieee80211_scan_completed(priv->hw);
6859
6860 /* Since setting the TXPOWER may have been deferred while
6861 * performing the scan, fire one off */
6862 mutex_lock(&priv->mutex);
6863 iwl_hw_reg_send_txpower(priv);
6864 mutex_unlock(&priv->mutex);
6865 }
6866
6867 /*****************************************************************************
6868 *
6869 * mac80211 entry point functions
6870 *
6871 *****************************************************************************/
6872
6873 static int iwl_mac_start(struct ieee80211_hw *hw)
6874 {
6875 struct iwl_priv *priv = hw->priv;
6876
6877 IWL_DEBUG_MAC80211("enter\n");
6878
6879 /* we should be verifying the device is ready to be opened */
6880 mutex_lock(&priv->mutex);
6881
6882 priv->is_open = 1;
6883
6884 if (!iwl_is_rfkill(priv))
6885 ieee80211_start_queues(priv->hw);
6886
6887 mutex_unlock(&priv->mutex);
6888 IWL_DEBUG_MAC80211("leave\n");
6889 return 0;
6890 }
6891
6892 static void iwl_mac_stop(struct ieee80211_hw *hw)
6893 {
6894 struct iwl_priv *priv = hw->priv;
6895
6896 IWL_DEBUG_MAC80211("enter\n");
6897
6898
6899 mutex_lock(&priv->mutex);
6900 /* stop mac, cancel any scan request and clear
6901 * RXON_FILTER_ASSOC_MSK BIT
6902 */
6903 priv->is_open = 0;
6904 iwl_scan_cancel_timeout(priv, 100);
6905 cancel_delayed_work(&priv->post_associate);
6906 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6907 iwl_commit_rxon(priv);
6908 mutex_unlock(&priv->mutex);
6909
6910 IWL_DEBUG_MAC80211("leave\n");
6911 }
6912
6913 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6914 struct ieee80211_tx_control *ctl)
6915 {
6916 struct iwl_priv *priv = hw->priv;
6917
6918 IWL_DEBUG_MAC80211("enter\n");
6919
6920 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6921 IWL_DEBUG_MAC80211("leave - monitor\n");
6922 return -1;
6923 }
6924
6925 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6926 ctl->tx_rate);
6927
6928 if (iwl_tx_skb(priv, skb, ctl))
6929 dev_kfree_skb_any(skb);
6930
6931 IWL_DEBUG_MAC80211("leave\n");
6932 return 0;
6933 }
6934
6935 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6936 struct ieee80211_if_init_conf *conf)
6937 {
6938 struct iwl_priv *priv = hw->priv;
6939 unsigned long flags;
6940 DECLARE_MAC_BUF(mac);
6941
6942 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6943 if (conf->mac_addr)
6944 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6945 print_mac(mac, conf->mac_addr));
6946
6947 if (priv->interface_id) {
6948 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6949 return 0;
6950 }
6951
6952 spin_lock_irqsave(&priv->lock, flags);
6953 priv->interface_id = conf->if_id;
6954
6955 spin_unlock_irqrestore(&priv->lock, flags);
6956
6957 mutex_lock(&priv->mutex);
6958 iwl_set_mode(priv, conf->type);
6959
6960 IWL_DEBUG_MAC80211("leave\n");
6961 mutex_unlock(&priv->mutex);
6962
6963 return 0;
6964 }
6965
6966 /**
6967 * iwl_mac_config - mac80211 config callback
6968 *
6969 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6970 * be set inappropriately and the driver currently sets the hardware up to
6971 * use it whenever needed.
6972 */
6973 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6974 {
6975 struct iwl_priv *priv = hw->priv;
6976 const struct iwl_channel_info *ch_info;
6977 unsigned long flags;
6978
6979 mutex_lock(&priv->mutex);
6980 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6981
6982 if (!iwl_is_ready(priv)) {
6983 IWL_DEBUG_MAC80211("leave - not ready\n");
6984 mutex_unlock(&priv->mutex);
6985 return -EIO;
6986 }
6987
6988 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6989 * what is exposed through include/ declrations */
6990 if (unlikely(!iwl_param_disable_hw_scan &&
6991 test_bit(STATUS_SCANNING, &priv->status))) {
6992 IWL_DEBUG_MAC80211("leave - scanning\n");
6993 mutex_unlock(&priv->mutex);
6994 return 0;
6995 }
6996
6997 spin_lock_irqsave(&priv->lock, flags);
6998
6999 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7000 if (!is_channel_valid(ch_info)) {
7001 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7002 conf->channel, conf->phymode);
7003 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7004 spin_unlock_irqrestore(&priv->lock, flags);
7005 mutex_unlock(&priv->mutex);
7006 return -EINVAL;
7007 }
7008
7009 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7010
7011 iwl_set_flags_for_phymode(priv, conf->phymode);
7012
7013 /* The list of supported rates and rate mask can be different
7014 * for each phymode; since the phymode may have changed, reset
7015 * the rate mask to what mac80211 lists */
7016 iwl_set_rate(priv);
7017
7018 spin_unlock_irqrestore(&priv->lock, flags);
7019
7020 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7021 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7022 iwl_hw_channel_switch(priv, conf->channel);
7023 mutex_unlock(&priv->mutex);
7024 return 0;
7025 }
7026 #endif
7027
7028 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7029
7030 if (!conf->radio_enabled) {
7031 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7032 mutex_unlock(&priv->mutex);
7033 return 0;
7034 }
7035
7036 if (iwl_is_rfkill(priv)) {
7037 IWL_DEBUG_MAC80211("leave - RF kill\n");
7038 mutex_unlock(&priv->mutex);
7039 return -EIO;
7040 }
7041
7042 iwl_set_rate(priv);
7043
7044 if (memcmp(&priv->active_rxon,
7045 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7046 iwl_commit_rxon(priv);
7047 else
7048 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7049
7050 IWL_DEBUG_MAC80211("leave\n");
7051
7052 mutex_unlock(&priv->mutex);
7053
7054 return 0;
7055 }
7056
7057 static void iwl_config_ap(struct iwl_priv *priv)
7058 {
7059 int rc = 0;
7060
7061 if (priv->status & STATUS_EXIT_PENDING)
7062 return;
7063
7064 /* The following should be done only at AP bring up */
7065 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7066
7067 /* RXON - unassoc (to set timing command) */
7068 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7069 iwl_commit_rxon(priv);
7070
7071 /* RXON Timing */
7072 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7073 iwl_setup_rxon_timing(priv);
7074 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7075 sizeof(priv->rxon_timing), &priv->rxon_timing);
7076 if (rc)
7077 IWL_WARNING("REPLY_RXON_TIMING failed - "
7078 "Attempting to continue.\n");
7079
7080 /* FIXME: what should be the assoc_id for AP? */
7081 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7082 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7083 priv->staging_rxon.flags |=
7084 RXON_FLG_SHORT_PREAMBLE_MSK;
7085 else
7086 priv->staging_rxon.flags &=
7087 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7088
7089 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7090 if (priv->assoc_capability &
7091 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7092 priv->staging_rxon.flags |=
7093 RXON_FLG_SHORT_SLOT_MSK;
7094 else
7095 priv->staging_rxon.flags &=
7096 ~RXON_FLG_SHORT_SLOT_MSK;
7097
7098 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7099 priv->staging_rxon.flags &=
7100 ~RXON_FLG_SHORT_SLOT_MSK;
7101 }
7102 /* restore RXON assoc */
7103 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7104 iwl_commit_rxon(priv);
7105 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7106 }
7107 iwl_send_beacon_cmd(priv);
7108
7109 /* FIXME - we need to add code here to detect a totally new
7110 * configuration, reset the AP, unassoc, rxon timing, assoc,
7111 * clear sta table, add BCAST sta... */
7112 }
7113
7114 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7115 struct ieee80211_if_conf *conf)
7116 {
7117 struct iwl_priv *priv = hw->priv;
7118 DECLARE_MAC_BUF(mac);
7119 unsigned long flags;
7120 int rc;
7121
7122 if (conf == NULL)
7123 return -EIO;
7124
7125 /* XXX: this MUST use conf->mac_addr */
7126
7127 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7128 (!conf->beacon || !conf->ssid_len)) {
7129 IWL_DEBUG_MAC80211
7130 ("Leaving in AP mode because HostAPD is not ready.\n");
7131 return 0;
7132 }
7133
7134 mutex_lock(&priv->mutex);
7135
7136 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7137 if (conf->bssid)
7138 IWL_DEBUG_MAC80211("bssid: %s\n",
7139 print_mac(mac, conf->bssid));
7140
7141 /*
7142 * very dubious code was here; the probe filtering flag is never set:
7143 *
7144 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7145 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7146 */
7147 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7148 IWL_DEBUG_MAC80211("leave - scanning\n");
7149 mutex_unlock(&priv->mutex);
7150 return 0;
7151 }
7152
7153 if (priv->interface_id != if_id) {
7154 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7155 mutex_unlock(&priv->mutex);
7156 return 0;
7157 }
7158
7159 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7160 if (!conf->bssid) {
7161 conf->bssid = priv->mac_addr;
7162 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7163 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7164 print_mac(mac, conf->bssid));
7165 }
7166 if (priv->ibss_beacon)
7167 dev_kfree_skb(priv->ibss_beacon);
7168
7169 priv->ibss_beacon = conf->beacon;
7170 }
7171
7172 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7173 !is_multicast_ether_addr(conf->bssid)) {
7174 /* If there is currently a HW scan going on in the background
7175 * then we need to cancel it else the RXON below will fail. */
7176 if (iwl_scan_cancel_timeout(priv, 100)) {
7177 IWL_WARNING("Aborted scan still in progress "
7178 "after 100ms\n");
7179 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7180 mutex_unlock(&priv->mutex);
7181 return -EAGAIN;
7182 }
7183 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7184
7185 /* TODO: Audit driver for usage of these members and see
7186 * if mac80211 deprecates them (priv->bssid looks like it
7187 * shouldn't be there, but I haven't scanned the IBSS code
7188 * to verify) - jpk */
7189 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7190
7191 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7192 iwl_config_ap(priv);
7193 else {
7194 rc = iwl_commit_rxon(priv);
7195 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7196 iwl_add_station(priv,
7197 priv->active_rxon.bssid_addr, 1, 0);
7198 }
7199
7200 } else {
7201 iwl_scan_cancel_timeout(priv, 100);
7202 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7203 iwl_commit_rxon(priv);
7204 }
7205
7206 spin_lock_irqsave(&priv->lock, flags);
7207 if (!conf->ssid_len)
7208 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7209 else
7210 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7211
7212 priv->essid_len = conf->ssid_len;
7213 spin_unlock_irqrestore(&priv->lock, flags);
7214
7215 IWL_DEBUG_MAC80211("leave\n");
7216 mutex_unlock(&priv->mutex);
7217
7218 return 0;
7219 }
7220
7221 static void iwl_configure_filter(struct ieee80211_hw *hw,
7222 unsigned int changed_flags,
7223 unsigned int *total_flags,
7224 int mc_count, struct dev_addr_list *mc_list)
7225 {
7226 /*
7227 * XXX: dummy
7228 * see also iwl_connection_init_rx_config
7229 */
7230 *total_flags = 0;
7231 }
7232
7233 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7234 struct ieee80211_if_init_conf *conf)
7235 {
7236 struct iwl_priv *priv = hw->priv;
7237
7238 IWL_DEBUG_MAC80211("enter\n");
7239
7240 mutex_lock(&priv->mutex);
7241
7242 iwl_scan_cancel_timeout(priv, 100);
7243 cancel_delayed_work(&priv->post_associate);
7244 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7245 iwl_commit_rxon(priv);
7246
7247 if (priv->interface_id == conf->if_id) {
7248 priv->interface_id = 0;
7249 memset(priv->bssid, 0, ETH_ALEN);
7250 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7251 priv->essid_len = 0;
7252 }
7253 mutex_unlock(&priv->mutex);
7254
7255 IWL_DEBUG_MAC80211("leave\n");
7256
7257 }
7258
7259 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7260 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7261 {
7262 int rc = 0;
7263 unsigned long flags;
7264 struct iwl_priv *priv = hw->priv;
7265
7266 IWL_DEBUG_MAC80211("enter\n");
7267
7268 mutex_lock(&priv->mutex);
7269 spin_lock_irqsave(&priv->lock, flags);
7270
7271 if (!iwl_is_ready_rf(priv)) {
7272 rc = -EIO;
7273 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7274 goto out_unlock;
7275 }
7276
7277 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7278 rc = -EIO;
7279 IWL_ERROR("ERROR: APs don't scan\n");
7280 goto out_unlock;
7281 }
7282
7283 /* if we just finished scan ask for delay */
7284 if (priv->last_scan_jiffies &&
7285 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7286 jiffies)) {
7287 rc = -EAGAIN;
7288 goto out_unlock;
7289 }
7290 if (len) {
7291 IWL_DEBUG_SCAN("direct scan for "
7292 "%s [%d]\n ",
7293 iwl_escape_essid(ssid, len), (int)len);
7294
7295 priv->one_direct_scan = 1;
7296 priv->direct_ssid_len = (u8)
7297 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7298 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7299 } else
7300 priv->one_direct_scan = 0;
7301
7302 rc = iwl_scan_initiate(priv);
7303
7304 IWL_DEBUG_MAC80211("leave\n");
7305
7306 out_unlock:
7307 spin_unlock_irqrestore(&priv->lock, flags);
7308 mutex_unlock(&priv->mutex);
7309
7310 return rc;
7311 }
7312
7313 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7314 const u8 *local_addr, const u8 *addr,
7315 struct ieee80211_key_conf *key)
7316 {
7317 struct iwl_priv *priv = hw->priv;
7318 int rc = 0;
7319 u8 sta_id;
7320
7321 IWL_DEBUG_MAC80211("enter\n");
7322
7323 if (!iwl_param_hwcrypto) {
7324 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7325 return -EOPNOTSUPP;
7326 }
7327
7328 if (is_zero_ether_addr(addr))
7329 /* only support pairwise keys */
7330 return -EOPNOTSUPP;
7331
7332 sta_id = iwl_hw_find_station(priv, addr);
7333 if (sta_id == IWL_INVALID_STATION) {
7334 DECLARE_MAC_BUF(mac);
7335
7336 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7337 print_mac(mac, addr));
7338 return -EINVAL;
7339 }
7340
7341 mutex_lock(&priv->mutex);
7342
7343 iwl_scan_cancel_timeout(priv, 100);
7344
7345 switch (cmd) {
7346 case SET_KEY:
7347 rc = iwl_update_sta_key_info(priv, key, sta_id);
7348 if (!rc) {
7349 iwl_set_rxon_hwcrypto(priv, 1);
7350 iwl_commit_rxon(priv);
7351 key->hw_key_idx = sta_id;
7352 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7353 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7354 }
7355 break;
7356 case DISABLE_KEY:
7357 rc = iwl_clear_sta_key_info(priv, sta_id);
7358 if (!rc) {
7359 iwl_set_rxon_hwcrypto(priv, 0);
7360 iwl_commit_rxon(priv);
7361 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7362 }
7363 break;
7364 default:
7365 rc = -EINVAL;
7366 }
7367
7368 IWL_DEBUG_MAC80211("leave\n");
7369 mutex_unlock(&priv->mutex);
7370
7371 return rc;
7372 }
7373
7374 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7375 const struct ieee80211_tx_queue_params *params)
7376 {
7377 struct iwl_priv *priv = hw->priv;
7378 #ifdef CONFIG_IWLWIFI_QOS
7379 unsigned long flags;
7380 int q;
7381 #endif /* CONFIG_IWL_QOS */
7382
7383 IWL_DEBUG_MAC80211("enter\n");
7384
7385 if (!iwl_is_ready_rf(priv)) {
7386 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7387 return -EIO;
7388 }
7389
7390 if (queue >= AC_NUM) {
7391 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7392 return 0;
7393 }
7394
7395 #ifdef CONFIG_IWLWIFI_QOS
7396 if (!priv->qos_data.qos_enable) {
7397 priv->qos_data.qos_active = 0;
7398 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7399 return 0;
7400 }
7401 q = AC_NUM - 1 - queue;
7402
7403 spin_lock_irqsave(&priv->lock, flags);
7404
7405 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7406 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7407 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7408 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7409 cpu_to_le16((params->burst_time * 100));
7410
7411 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7412 priv->qos_data.qos_active = 1;
7413
7414 spin_unlock_irqrestore(&priv->lock, flags);
7415
7416 mutex_lock(&priv->mutex);
7417 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7418 iwl_activate_qos(priv, 1);
7419 else if (priv->assoc_id && iwl_is_associated(priv))
7420 iwl_activate_qos(priv, 0);
7421
7422 mutex_unlock(&priv->mutex);
7423
7424 #endif /*CONFIG_IWLWIFI_QOS */
7425
7426 IWL_DEBUG_MAC80211("leave\n");
7427 return 0;
7428 }
7429
7430 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7431 struct ieee80211_tx_queue_stats *stats)
7432 {
7433 struct iwl_priv *priv = hw->priv;
7434 int i, avail;
7435 struct iwl_tx_queue *txq;
7436 struct iwl_queue *q;
7437 unsigned long flags;
7438
7439 IWL_DEBUG_MAC80211("enter\n");
7440
7441 if (!iwl_is_ready_rf(priv)) {
7442 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7443 return -EIO;
7444 }
7445
7446 spin_lock_irqsave(&priv->lock, flags);
7447
7448 for (i = 0; i < AC_NUM; i++) {
7449 txq = &priv->txq[i];
7450 q = &txq->q;
7451 avail = iwl_queue_space(q);
7452
7453 stats->data[i].len = q->n_window - avail;
7454 stats->data[i].limit = q->n_window - q->high_mark;
7455 stats->data[i].count = q->n_window;
7456
7457 }
7458 spin_unlock_irqrestore(&priv->lock, flags);
7459
7460 IWL_DEBUG_MAC80211("leave\n");
7461
7462 return 0;
7463 }
7464
7465 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7466 struct ieee80211_low_level_stats *stats)
7467 {
7468 IWL_DEBUG_MAC80211("enter\n");
7469 IWL_DEBUG_MAC80211("leave\n");
7470
7471 return 0;
7472 }
7473
7474 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7475 {
7476 IWL_DEBUG_MAC80211("enter\n");
7477 IWL_DEBUG_MAC80211("leave\n");
7478
7479 return 0;
7480 }
7481
7482 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7483 {
7484 struct iwl_priv *priv = hw->priv;
7485 unsigned long flags;
7486
7487 mutex_lock(&priv->mutex);
7488 IWL_DEBUG_MAC80211("enter\n");
7489
7490 #ifdef CONFIG_IWLWIFI_QOS
7491 iwl_reset_qos(priv);
7492 #endif
7493 cancel_delayed_work(&priv->post_associate);
7494
7495 spin_lock_irqsave(&priv->lock, flags);
7496 priv->assoc_id = 0;
7497 priv->assoc_capability = 0;
7498 priv->call_post_assoc_from_beacon = 0;
7499
7500 /* new association get rid of ibss beacon skb */
7501 if (priv->ibss_beacon)
7502 dev_kfree_skb(priv->ibss_beacon);
7503
7504 priv->ibss_beacon = NULL;
7505
7506 priv->beacon_int = priv->hw->conf.beacon_int;
7507 priv->timestamp1 = 0;
7508 priv->timestamp0 = 0;
7509 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7510 priv->beacon_int = 0;
7511
7512 spin_unlock_irqrestore(&priv->lock, flags);
7513
7514 /* we are restarting association process
7515 * clear RXON_FILTER_ASSOC_MSK bit
7516 */
7517 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7518 iwl_scan_cancel_timeout(priv, 100);
7519 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7520 iwl_commit_rxon(priv);
7521 }
7522
7523 /* Per mac80211.h: This is only used in IBSS mode... */
7524 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7525
7526 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7527 mutex_unlock(&priv->mutex);
7528 return;
7529 }
7530
7531 if (!iwl_is_ready_rf(priv)) {
7532 IWL_DEBUG_MAC80211("leave - not ready\n");
7533 mutex_unlock(&priv->mutex);
7534 return;
7535 }
7536
7537 priv->only_active_channel = 0;
7538
7539 iwl_set_rate(priv);
7540
7541 mutex_unlock(&priv->mutex);
7542
7543 IWL_DEBUG_MAC80211("leave\n");
7544
7545 }
7546
7547 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7548 struct ieee80211_tx_control *control)
7549 {
7550 struct iwl_priv *priv = hw->priv;
7551 unsigned long flags;
7552
7553 mutex_lock(&priv->mutex);
7554 IWL_DEBUG_MAC80211("enter\n");
7555
7556 if (!iwl_is_ready_rf(priv)) {
7557 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7558 mutex_unlock(&priv->mutex);
7559 return -EIO;
7560 }
7561
7562 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7563 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7564 mutex_unlock(&priv->mutex);
7565 return -EIO;
7566 }
7567
7568 spin_lock_irqsave(&priv->lock, flags);
7569
7570 if (priv->ibss_beacon)
7571 dev_kfree_skb(priv->ibss_beacon);
7572
7573 priv->ibss_beacon = skb;
7574
7575 priv->assoc_id = 0;
7576
7577 IWL_DEBUG_MAC80211("leave\n");
7578 spin_unlock_irqrestore(&priv->lock, flags);
7579
7580 #ifdef CONFIG_IWLWIFI_QOS
7581 iwl_reset_qos(priv);
7582 #endif
7583
7584 queue_work(priv->workqueue, &priv->post_associate.work);
7585
7586 mutex_unlock(&priv->mutex);
7587
7588 return 0;
7589 }
7590
7591 /*****************************************************************************
7592 *
7593 * sysfs attributes
7594 *
7595 *****************************************************************************/
7596
7597 #ifdef CONFIG_IWLWIFI_DEBUG
7598
7599 /*
7600 * The following adds a new attribute to the sysfs representation
7601 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7602 * used for controlling the debug level.
7603 *
7604 * See the level definitions in iwl for details.
7605 */
7606
7607 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7608 {
7609 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7610 }
7611 static ssize_t store_debug_level(struct device_driver *d,
7612 const char *buf, size_t count)
7613 {
7614 char *p = (char *)buf;
7615 u32 val;
7616
7617 val = simple_strtoul(p, &p, 0);
7618 if (p == buf)
7619 printk(KERN_INFO DRV_NAME
7620 ": %s is not in hex or decimal form.\n", buf);
7621 else
7622 iwl_debug_level = val;
7623
7624 return strnlen(buf, count);
7625 }
7626
7627 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7628 show_debug_level, store_debug_level);
7629
7630 #endif /* CONFIG_IWLWIFI_DEBUG */
7631
7632 static ssize_t show_rf_kill(struct device *d,
7633 struct device_attribute *attr, char *buf)
7634 {
7635 /*
7636 * 0 - RF kill not enabled
7637 * 1 - SW based RF kill active (sysfs)
7638 * 2 - HW based RF kill active
7639 * 3 - Both HW and SW based RF kill active
7640 */
7641 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7642 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7643 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7644
7645 return sprintf(buf, "%i\n", val);
7646 }
7647
7648 static ssize_t store_rf_kill(struct device *d,
7649 struct device_attribute *attr,
7650 const char *buf, size_t count)
7651 {
7652 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7653
7654 mutex_lock(&priv->mutex);
7655 iwl_radio_kill_sw(priv, buf[0] == '1');
7656 mutex_unlock(&priv->mutex);
7657
7658 return count;
7659 }
7660
7661 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7662
7663 static ssize_t show_temperature(struct device *d,
7664 struct device_attribute *attr, char *buf)
7665 {
7666 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7667
7668 if (!iwl_is_alive(priv))
7669 return -EAGAIN;
7670
7671 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7672 }
7673
7674 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7675
7676 static ssize_t show_rs_window(struct device *d,
7677 struct device_attribute *attr,
7678 char *buf)
7679 {
7680 struct iwl_priv *priv = d->driver_data;
7681 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7682 }
7683 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7684
7685 static ssize_t show_tx_power(struct device *d,
7686 struct device_attribute *attr, char *buf)
7687 {
7688 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7689 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7690 }
7691
7692 static ssize_t store_tx_power(struct device *d,
7693 struct device_attribute *attr,
7694 const char *buf, size_t count)
7695 {
7696 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7697 char *p = (char *)buf;
7698 u32 val;
7699
7700 val = simple_strtoul(p, &p, 10);
7701 if (p == buf)
7702 printk(KERN_INFO DRV_NAME
7703 ": %s is not in decimal form.\n", buf);
7704 else
7705 iwl_hw_reg_set_txpower(priv, val);
7706
7707 return count;
7708 }
7709
7710 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7711
7712 static ssize_t show_flags(struct device *d,
7713 struct device_attribute *attr, char *buf)
7714 {
7715 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7716
7717 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7718 }
7719
7720 static ssize_t store_flags(struct device *d,
7721 struct device_attribute *attr,
7722 const char *buf, size_t count)
7723 {
7724 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7725 u32 flags = simple_strtoul(buf, NULL, 0);
7726
7727 mutex_lock(&priv->mutex);
7728 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7729 /* Cancel any currently running scans... */
7730 if (iwl_scan_cancel_timeout(priv, 100))
7731 IWL_WARNING("Could not cancel scan.\n");
7732 else {
7733 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7734 flags);
7735 priv->staging_rxon.flags = cpu_to_le32(flags);
7736 iwl_commit_rxon(priv);
7737 }
7738 }
7739 mutex_unlock(&priv->mutex);
7740
7741 return count;
7742 }
7743
7744 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7745
7746 static ssize_t show_filter_flags(struct device *d,
7747 struct device_attribute *attr, char *buf)
7748 {
7749 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7750
7751 return sprintf(buf, "0x%04X\n",
7752 le32_to_cpu(priv->active_rxon.filter_flags));
7753 }
7754
7755 static ssize_t store_filter_flags(struct device *d,
7756 struct device_attribute *attr,
7757 const char *buf, size_t count)
7758 {
7759 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7760 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7761
7762 mutex_lock(&priv->mutex);
7763 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7764 /* Cancel any currently running scans... */
7765 if (iwl_scan_cancel_timeout(priv, 100))
7766 IWL_WARNING("Could not cancel scan.\n");
7767 else {
7768 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7769 "0x%04X\n", filter_flags);
7770 priv->staging_rxon.filter_flags =
7771 cpu_to_le32(filter_flags);
7772 iwl_commit_rxon(priv);
7773 }
7774 }
7775 mutex_unlock(&priv->mutex);
7776
7777 return count;
7778 }
7779
7780 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7781 store_filter_flags);
7782
7783 static ssize_t show_tune(struct device *d,
7784 struct device_attribute *attr, char *buf)
7785 {
7786 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7787
7788 return sprintf(buf, "0x%04X\n",
7789 (priv->phymode << 8) |
7790 le16_to_cpu(priv->active_rxon.channel));
7791 }
7792
7793 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7794
7795 static ssize_t store_tune(struct device *d,
7796 struct device_attribute *attr,
7797 const char *buf, size_t count)
7798 {
7799 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7800 char *p = (char *)buf;
7801 u16 tune = simple_strtoul(p, &p, 0);
7802 u8 phymode = (tune >> 8) & 0xff;
7803 u16 channel = tune & 0xff;
7804
7805 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7806
7807 mutex_lock(&priv->mutex);
7808 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7809 (priv->phymode != phymode)) {
7810 const struct iwl_channel_info *ch_info;
7811
7812 ch_info = iwl_get_channel_info(priv, phymode, channel);
7813 if (!ch_info) {
7814 IWL_WARNING("Requested invalid phymode/channel "
7815 "combination: %d %d\n", phymode, channel);
7816 mutex_unlock(&priv->mutex);
7817 return -EINVAL;
7818 }
7819
7820 /* Cancel any currently running scans... */
7821 if (iwl_scan_cancel_timeout(priv, 100))
7822 IWL_WARNING("Could not cancel scan.\n");
7823 else {
7824 IWL_DEBUG_INFO("Committing phymode and "
7825 "rxon.channel = %d %d\n",
7826 phymode, channel);
7827
7828 iwl_set_rxon_channel(priv, phymode, channel);
7829 iwl_set_flags_for_phymode(priv, phymode);
7830
7831 iwl_set_rate(priv);
7832 iwl_commit_rxon(priv);
7833 }
7834 }
7835 mutex_unlock(&priv->mutex);
7836
7837 return count;
7838 }
7839
7840 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7841
7842 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7843
7844 static ssize_t show_measurement(struct device *d,
7845 struct device_attribute *attr, char *buf)
7846 {
7847 struct iwl_priv *priv = dev_get_drvdata(d);
7848 struct iwl_spectrum_notification measure_report;
7849 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7850 u8 *data = (u8 *) & measure_report;
7851 unsigned long flags;
7852
7853 spin_lock_irqsave(&priv->lock, flags);
7854 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7855 spin_unlock_irqrestore(&priv->lock, flags);
7856 return 0;
7857 }
7858 memcpy(&measure_report, &priv->measure_report, size);
7859 priv->measurement_status = 0;
7860 spin_unlock_irqrestore(&priv->lock, flags);
7861
7862 while (size && (PAGE_SIZE - len)) {
7863 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7864 PAGE_SIZE - len, 1);
7865 len = strlen(buf);
7866 if (PAGE_SIZE - len)
7867 buf[len++] = '\n';
7868
7869 ofs += 16;
7870 size -= min(size, 16U);
7871 }
7872
7873 return len;
7874 }
7875
7876 static ssize_t store_measurement(struct device *d,
7877 struct device_attribute *attr,
7878 const char *buf, size_t count)
7879 {
7880 struct iwl_priv *priv = dev_get_drvdata(d);
7881 struct ieee80211_measurement_params params = {
7882 .channel = le16_to_cpu(priv->active_rxon.channel),
7883 .start_time = cpu_to_le64(priv->last_tsf),
7884 .duration = cpu_to_le16(1),
7885 };
7886 u8 type = IWL_MEASURE_BASIC;
7887 u8 buffer[32];
7888 u8 channel;
7889
7890 if (count) {
7891 char *p = buffer;
7892 strncpy(buffer, buf, min(sizeof(buffer), count));
7893 channel = simple_strtoul(p, NULL, 0);
7894 if (channel)
7895 params.channel = channel;
7896
7897 p = buffer;
7898 while (*p && *p != ' ')
7899 p++;
7900 if (*p)
7901 type = simple_strtoul(p + 1, NULL, 0);
7902 }
7903
7904 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7905 "channel %d (for '%s')\n", type, params.channel, buf);
7906 iwl_get_measurement(priv, &params, type);
7907
7908 return count;
7909 }
7910
7911 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7912 show_measurement, store_measurement);
7913 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7914
7915 static ssize_t show_rate(struct device *d,
7916 struct device_attribute *attr, char *buf)
7917 {
7918 struct iwl_priv *priv = dev_get_drvdata(d);
7919 unsigned long flags;
7920 int i;
7921
7922 spin_lock_irqsave(&priv->sta_lock, flags);
7923 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7924 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7925 else
7926 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7927 spin_unlock_irqrestore(&priv->sta_lock, flags);
7928
7929 i = iwl_rate_index_from_plcp(i);
7930 if (i == -1)
7931 return sprintf(buf, "0\n");
7932
7933 return sprintf(buf, "%d%s\n",
7934 (iwl_rates[i].ieee >> 1),
7935 (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7936 }
7937
7938 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7939
7940 static ssize_t store_retry_rate(struct device *d,
7941 struct device_attribute *attr,
7942 const char *buf, size_t count)
7943 {
7944 struct iwl_priv *priv = dev_get_drvdata(d);
7945
7946 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7947 if (priv->retry_rate <= 0)
7948 priv->retry_rate = 1;
7949
7950 return count;
7951 }
7952
7953 static ssize_t show_retry_rate(struct device *d,
7954 struct device_attribute *attr, char *buf)
7955 {
7956 struct iwl_priv *priv = dev_get_drvdata(d);
7957 return sprintf(buf, "%d", priv->retry_rate);
7958 }
7959
7960 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7961 store_retry_rate);
7962
7963 static ssize_t store_power_level(struct device *d,
7964 struct device_attribute *attr,
7965 const char *buf, size_t count)
7966 {
7967 struct iwl_priv *priv = dev_get_drvdata(d);
7968 int rc;
7969 int mode;
7970
7971 mode = simple_strtoul(buf, NULL, 0);
7972 mutex_lock(&priv->mutex);
7973
7974 if (!iwl_is_ready(priv)) {
7975 rc = -EAGAIN;
7976 goto out;
7977 }
7978
7979 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7980 mode = IWL_POWER_AC;
7981 else
7982 mode |= IWL_POWER_ENABLED;
7983
7984 if (mode != priv->power_mode) {
7985 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7986 if (rc) {
7987 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7988 goto out;
7989 }
7990 priv->power_mode = mode;
7991 }
7992
7993 rc = count;
7994
7995 out:
7996 mutex_unlock(&priv->mutex);
7997 return rc;
7998 }
7999
8000 #define MAX_WX_STRING 80
8001
8002 /* Values are in microsecond */
8003 static const s32 timeout_duration[] = {
8004 350000,
8005 250000,
8006 75000,
8007 37000,
8008 25000,
8009 };
8010 static const s32 period_duration[] = {
8011 400000,
8012 700000,
8013 1000000,
8014 1000000,
8015 1000000
8016 };
8017
8018 static ssize_t show_power_level(struct device *d,
8019 struct device_attribute *attr, char *buf)
8020 {
8021 struct iwl_priv *priv = dev_get_drvdata(d);
8022 int level = IWL_POWER_LEVEL(priv->power_mode);
8023 char *p = buf;
8024
8025 p += sprintf(p, "%d ", level);
8026 switch (level) {
8027 case IWL_POWER_MODE_CAM:
8028 case IWL_POWER_AC:
8029 p += sprintf(p, "(AC)");
8030 break;
8031 case IWL_POWER_BATTERY:
8032 p += sprintf(p, "(BATTERY)");
8033 break;
8034 default:
8035 p += sprintf(p,
8036 "(Timeout %dms, Period %dms)",
8037 timeout_duration[level - 1] / 1000,
8038 period_duration[level - 1] / 1000);
8039 }
8040
8041 if (!(priv->power_mode & IWL_POWER_ENABLED))
8042 p += sprintf(p, " OFF\n");
8043 else
8044 p += sprintf(p, " \n");
8045
8046 return (p - buf + 1);
8047
8048 }
8049
8050 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8051 store_power_level);
8052
8053 static ssize_t show_channels(struct device *d,
8054 struct device_attribute *attr, char *buf)
8055 {
8056 struct iwl_priv *priv = dev_get_drvdata(d);
8057 int len = 0, i;
8058 struct ieee80211_channel *channels = NULL;
8059 const struct ieee80211_hw_mode *hw_mode = NULL;
8060 int count = 0;
8061
8062 if (!iwl_is_ready(priv))
8063 return -EAGAIN;
8064
8065 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8066 if (!hw_mode)
8067 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8068 if (hw_mode) {
8069 channels = hw_mode->channels;
8070 count = hw_mode->num_channels;
8071 }
8072
8073 len +=
8074 sprintf(&buf[len],
8075 "Displaying %d channels in 2.4GHz band "
8076 "(802.11bg):\n", count);
8077
8078 for (i = 0; i < count; i++)
8079 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8080 channels[i].chan,
8081 channels[i].power_level,
8082 channels[i].
8083 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8084 " (IEEE 802.11h required)" : "",
8085 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8086 || (channels[i].
8087 flag &
8088 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8089 ", IBSS",
8090 channels[i].
8091 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8092 "active/passive" : "passive only");
8093
8094 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8095 if (hw_mode) {
8096 channels = hw_mode->channels;
8097 count = hw_mode->num_channels;
8098 } else {
8099 channels = NULL;
8100 count = 0;
8101 }
8102
8103 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8104 "(802.11a):\n", count);
8105
8106 for (i = 0; i < count; i++)
8107 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8108 channels[i].chan,
8109 channels[i].power_level,
8110 channels[i].
8111 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8112 " (IEEE 802.11h required)" : "",
8113 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8114 || (channels[i].
8115 flag &
8116 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8117 ", IBSS",
8118 channels[i].
8119 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8120 "active/passive" : "passive only");
8121
8122 return len;
8123 }
8124
8125 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8126
8127 static ssize_t show_statistics(struct device *d,
8128 struct device_attribute *attr, char *buf)
8129 {
8130 struct iwl_priv *priv = dev_get_drvdata(d);
8131 u32 size = sizeof(struct iwl_notif_statistics);
8132 u32 len = 0, ofs = 0;
8133 u8 *data = (u8 *) & priv->statistics;
8134 int rc = 0;
8135
8136 if (!iwl_is_alive(priv))
8137 return -EAGAIN;
8138
8139 mutex_lock(&priv->mutex);
8140 rc = iwl_send_statistics_request(priv);
8141 mutex_unlock(&priv->mutex);
8142
8143 if (rc) {
8144 len = sprintf(buf,
8145 "Error sending statistics request: 0x%08X\n", rc);
8146 return len;
8147 }
8148
8149 while (size && (PAGE_SIZE - len)) {
8150 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8151 PAGE_SIZE - len, 1);
8152 len = strlen(buf);
8153 if (PAGE_SIZE - len)
8154 buf[len++] = '\n';
8155
8156 ofs += 16;
8157 size -= min(size, 16U);
8158 }
8159
8160 return len;
8161 }
8162
8163 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8164
8165 static ssize_t show_antenna(struct device *d,
8166 struct device_attribute *attr, char *buf)
8167 {
8168 struct iwl_priv *priv = dev_get_drvdata(d);
8169
8170 if (!iwl_is_alive(priv))
8171 return -EAGAIN;
8172
8173 return sprintf(buf, "%d\n", priv->antenna);
8174 }
8175
8176 static ssize_t store_antenna(struct device *d,
8177 struct device_attribute *attr,
8178 const char *buf, size_t count)
8179 {
8180 int ant;
8181 struct iwl_priv *priv = dev_get_drvdata(d);
8182
8183 if (count == 0)
8184 return 0;
8185
8186 if (sscanf(buf, "%1i", &ant) != 1) {
8187 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8188 return count;
8189 }
8190
8191 if ((ant >= 0) && (ant <= 2)) {
8192 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8193 priv->antenna = (enum iwl_antenna)ant;
8194 } else
8195 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8196
8197
8198 return count;
8199 }
8200
8201 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8202
8203 static ssize_t show_status(struct device *d,
8204 struct device_attribute *attr, char *buf)
8205 {
8206 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8207 if (!iwl_is_alive(priv))
8208 return -EAGAIN;
8209 return sprintf(buf, "0x%08x\n", (int)priv->status);
8210 }
8211
8212 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8213
8214 static ssize_t dump_error_log(struct device *d,
8215 struct device_attribute *attr,
8216 const char *buf, size_t count)
8217 {
8218 char *p = (char *)buf;
8219
8220 if (p[0] == '1')
8221 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8222
8223 return strnlen(buf, count);
8224 }
8225
8226 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8227
8228 static ssize_t dump_event_log(struct device *d,
8229 struct device_attribute *attr,
8230 const char *buf, size_t count)
8231 {
8232 char *p = (char *)buf;
8233
8234 if (p[0] == '1')
8235 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8236
8237 return strnlen(buf, count);
8238 }
8239
8240 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8241
8242 /*****************************************************************************
8243 *
8244 * driver setup and teardown
8245 *
8246 *****************************************************************************/
8247
8248 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8249 {
8250 priv->workqueue = create_workqueue(DRV_NAME);
8251
8252 init_waitqueue_head(&priv->wait_command_queue);
8253
8254 INIT_WORK(&priv->up, iwl_bg_up);
8255 INIT_WORK(&priv->restart, iwl_bg_restart);
8256 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8257 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8258 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8259 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8260 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8261 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8262 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8263 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8264 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8265 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8266
8267 iwl_hw_setup_deferred_work(priv);
8268
8269 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8270 iwl_irq_tasklet, (unsigned long)priv);
8271 }
8272
8273 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8274 {
8275 iwl_hw_cancel_deferred_work(priv);
8276
8277 cancel_delayed_work(&priv->scan_check);
8278 cancel_delayed_work(&priv->alive_start);
8279 cancel_delayed_work(&priv->post_associate);
8280 cancel_work_sync(&priv->beacon_update);
8281 }
8282
8283 static struct attribute *iwl_sysfs_entries[] = {
8284 &dev_attr_antenna.attr,
8285 &dev_attr_channels.attr,
8286 &dev_attr_dump_errors.attr,
8287 &dev_attr_dump_events.attr,
8288 &dev_attr_flags.attr,
8289 &dev_attr_filter_flags.attr,
8290 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8291 &dev_attr_measurement.attr,
8292 #endif
8293 &dev_attr_power_level.attr,
8294 &dev_attr_rate.attr,
8295 &dev_attr_retry_rate.attr,
8296 &dev_attr_rf_kill.attr,
8297 &dev_attr_rs_window.attr,
8298 &dev_attr_statistics.attr,
8299 &dev_attr_status.attr,
8300 &dev_attr_temperature.attr,
8301 &dev_attr_tune.attr,
8302 &dev_attr_tx_power.attr,
8303
8304 NULL
8305 };
8306
8307 static struct attribute_group iwl_attribute_group = {
8308 .name = NULL, /* put in device directory */
8309 .attrs = iwl_sysfs_entries,
8310 };
8311
8312 static struct ieee80211_ops iwl_hw_ops = {
8313 .tx = iwl_mac_tx,
8314 .start = iwl_mac_start,
8315 .stop = iwl_mac_stop,
8316 .add_interface = iwl_mac_add_interface,
8317 .remove_interface = iwl_mac_remove_interface,
8318 .config = iwl_mac_config,
8319 .config_interface = iwl_mac_config_interface,
8320 .configure_filter = iwl_configure_filter,
8321 .set_key = iwl_mac_set_key,
8322 .get_stats = iwl_mac_get_stats,
8323 .get_tx_stats = iwl_mac_get_tx_stats,
8324 .conf_tx = iwl_mac_conf_tx,
8325 .get_tsf = iwl_mac_get_tsf,
8326 .reset_tsf = iwl_mac_reset_tsf,
8327 .beacon_update = iwl_mac_beacon_update,
8328 .hw_scan = iwl_mac_hw_scan
8329 };
8330
8331 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8332 {
8333 int err = 0;
8334 u32 pci_id;
8335 struct iwl_priv *priv;
8336 struct ieee80211_hw *hw;
8337 int i;
8338
8339 if (iwl_param_disable_hw_scan) {
8340 IWL_DEBUG_INFO("Disabling hw_scan\n");
8341 iwl_hw_ops.hw_scan = NULL;
8342 }
8343
8344 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8345 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8346 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8347 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8348 err = -EINVAL;
8349 goto out;
8350 }
8351
8352 /* mac80211 allocates memory for this device instance, including
8353 * space for this driver's private structure */
8354 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8355 if (hw == NULL) {
8356 IWL_ERROR("Can not allocate network device\n");
8357 err = -ENOMEM;
8358 goto out;
8359 }
8360 SET_IEEE80211_DEV(hw, &pdev->dev);
8361
8362 hw->rate_control_algorithm = "iwl-3945-rs";
8363
8364 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8365 priv = hw->priv;
8366 priv->hw = hw;
8367
8368 priv->pci_dev = pdev;
8369 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8370 #ifdef CONFIG_IWLWIFI_DEBUG
8371 iwl_debug_level = iwl_param_debug;
8372 atomic_set(&priv->restrict_refcnt, 0);
8373 #endif
8374 priv->retry_rate = 1;
8375
8376 priv->ibss_beacon = NULL;
8377
8378 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8379 * the range of signal quality values that we'll provide.
8380 * Negative values for level/noise indicate that we'll provide dBm.
8381 * For WE, at least, non-0 values here *enable* display of values
8382 * in app (iwconfig). */
8383 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8384 hw->max_noise = -20; /* noise level, negative indicates dBm */
8385 hw->max_signal = 100; /* link quality indication (%) */
8386
8387 /* Tell mac80211 our Tx characteristics */
8388 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8389
8390 hw->queues = 4;
8391
8392 spin_lock_init(&priv->lock);
8393 spin_lock_init(&priv->power_data.lock);
8394 spin_lock_init(&priv->sta_lock);
8395 spin_lock_init(&priv->hcmd_lock);
8396
8397 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8398 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8399
8400 INIT_LIST_HEAD(&priv->free_frames);
8401
8402 mutex_init(&priv->mutex);
8403 if (pci_enable_device(pdev)) {
8404 err = -ENODEV;
8405 goto out_ieee80211_free_hw;
8406 }
8407
8408 pci_set_master(pdev);
8409
8410 iwl_clear_stations_table(priv);
8411
8412 priv->data_retry_limit = -1;
8413 priv->ieee_channels = NULL;
8414 priv->ieee_rates = NULL;
8415 priv->phymode = -1;
8416
8417 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8418 if (!err)
8419 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8420 if (err) {
8421 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8422 goto out_pci_disable_device;
8423 }
8424
8425 pci_set_drvdata(pdev, priv);
8426 err = pci_request_regions(pdev, DRV_NAME);
8427 if (err)
8428 goto out_pci_disable_device;
8429 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8430 * PCI Tx retries from interfering with C3 CPU state */
8431 pci_write_config_byte(pdev, 0x41, 0x00);
8432 priv->hw_base = pci_iomap(pdev, 0, 0);
8433 if (!priv->hw_base) {
8434 err = -ENODEV;
8435 goto out_pci_release_regions;
8436 }
8437
8438 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8439 (unsigned long long) pci_resource_len(pdev, 0));
8440 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8441
8442 /* Initialize module parameter values here */
8443
8444 if (iwl_param_disable) {
8445 set_bit(STATUS_RF_KILL_SW, &priv->status);
8446 IWL_DEBUG_INFO("Radio disabled.\n");
8447 }
8448
8449 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8450
8451 pci_id =
8452 (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8453
8454 switch (pci_id) {
8455 case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
8456 case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
8457 case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
8458 case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
8459 priv->is_abg = 0;
8460 break;
8461
8462 /*
8463 * Rest are assumed ABG SKU -- if this is not the
8464 * case then the card will get the wrong 'Detected'
8465 * line in the kernel log however the code that
8466 * initializes the GEO table will detect no A-band
8467 * channels and remove the is_abg mask.
8468 */
8469 default:
8470 priv->is_abg = 1;
8471 break;
8472 }
8473
8474 printk(KERN_INFO DRV_NAME
8475 ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8476 priv->is_abg ? "A" : "");
8477
8478 /* Device-specific setup */
8479 if (iwl_hw_set_hw_setting(priv)) {
8480 IWL_ERROR("failed to set hw settings\n");
8481 mutex_unlock(&priv->mutex);
8482 goto out_iounmap;
8483 }
8484
8485 #ifdef CONFIG_IWLWIFI_QOS
8486 if (iwl_param_qos_enable)
8487 priv->qos_data.qos_enable = 1;
8488
8489 iwl_reset_qos(priv);
8490
8491 priv->qos_data.qos_active = 0;
8492 priv->qos_data.qos_cap.val = 0;
8493 #endif /* CONFIG_IWLWIFI_QOS */
8494
8495 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8496 iwl_setup_deferred_work(priv);
8497 iwl_setup_rx_handlers(priv);
8498
8499 priv->rates_mask = IWL_RATES_MASK;
8500 /* If power management is turned on, default to AC mode */
8501 priv->power_mode = IWL_POWER_AC;
8502 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8503
8504 pci_enable_msi(pdev);
8505
8506 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8507 if (err) {
8508 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8509 goto out_disable_msi;
8510 }
8511
8512 mutex_lock(&priv->mutex);
8513
8514 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8515 if (err) {
8516 IWL_ERROR("failed to create sysfs device attributes\n");
8517 mutex_unlock(&priv->mutex);
8518 goto out_release_irq;
8519 }
8520
8521 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8522 * ucode filename and max sizes are card-specific. */
8523 err = iwl_read_ucode(priv);
8524 if (err) {
8525 IWL_ERROR("Could not read microcode: %d\n", err);
8526 mutex_unlock(&priv->mutex);
8527 goto out_pci_alloc;
8528 }
8529
8530 mutex_unlock(&priv->mutex);
8531
8532 IWL_DEBUG_INFO("Queing UP work.\n");
8533
8534 queue_work(priv->workqueue, &priv->up);
8535
8536 return 0;
8537
8538 out_pci_alloc:
8539 iwl_dealloc_ucode_pci(priv);
8540
8541 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8542
8543 out_release_irq:
8544 free_irq(pdev->irq, priv);
8545
8546 out_disable_msi:
8547 pci_disable_msi(pdev);
8548 destroy_workqueue(priv->workqueue);
8549 priv->workqueue = NULL;
8550 iwl_unset_hw_setting(priv);
8551
8552 out_iounmap:
8553 pci_iounmap(pdev, priv->hw_base);
8554 out_pci_release_regions:
8555 pci_release_regions(pdev);
8556 out_pci_disable_device:
8557 pci_disable_device(pdev);
8558 pci_set_drvdata(pdev, NULL);
8559 out_ieee80211_free_hw:
8560 ieee80211_free_hw(priv->hw);
8561 out:
8562 return err;
8563 }
8564
8565 static void iwl_pci_remove(struct pci_dev *pdev)
8566 {
8567 struct iwl_priv *priv = pci_get_drvdata(pdev);
8568 struct list_head *p, *q;
8569 int i;
8570
8571 if (!priv)
8572 return;
8573
8574 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8575
8576 mutex_lock(&priv->mutex);
8577 set_bit(STATUS_EXIT_PENDING, &priv->status);
8578 __iwl_down(priv);
8579 mutex_unlock(&priv->mutex);
8580
8581 /* Free MAC hash list for ADHOC */
8582 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8583 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8584 list_del(p);
8585 kfree(list_entry(p, struct iwl_ibss_seq, list));
8586 }
8587 }
8588
8589 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8590
8591 iwl_dealloc_ucode_pci(priv);
8592
8593 if (priv->rxq.bd)
8594 iwl_rx_queue_free(priv, &priv->rxq);
8595 iwl_hw_txq_ctx_free(priv);
8596
8597 iwl_unset_hw_setting(priv);
8598 iwl_clear_stations_table(priv);
8599
8600 if (priv->mac80211_registered) {
8601 ieee80211_unregister_hw(priv->hw);
8602 iwl_rate_control_unregister(priv->hw);
8603 }
8604
8605 /*netif_stop_queue(dev); */
8606 flush_workqueue(priv->workqueue);
8607
8608 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8609 * priv->workqueue... so we can't take down the workqueue
8610 * until now... */
8611 destroy_workqueue(priv->workqueue);
8612 priv->workqueue = NULL;
8613
8614 free_irq(pdev->irq, priv);
8615 pci_disable_msi(pdev);
8616 pci_iounmap(pdev, priv->hw_base);
8617 pci_release_regions(pdev);
8618 pci_disable_device(pdev);
8619 pci_set_drvdata(pdev, NULL);
8620
8621 kfree(priv->channel_info);
8622
8623 kfree(priv->ieee_channels);
8624 kfree(priv->ieee_rates);
8625
8626 if (priv->ibss_beacon)
8627 dev_kfree_skb(priv->ibss_beacon);
8628
8629 ieee80211_free_hw(priv->hw);
8630 }
8631
8632 #ifdef CONFIG_PM
8633
8634 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8635 {
8636 struct iwl_priv *priv = pci_get_drvdata(pdev);
8637
8638 mutex_lock(&priv->mutex);
8639
8640 set_bit(STATUS_IN_SUSPEND, &priv->status);
8641
8642 /* Take down the device; powers it off, etc. */
8643 __iwl_down(priv);
8644
8645 if (priv->mac80211_registered)
8646 ieee80211_stop_queues(priv->hw);
8647
8648 pci_save_state(pdev);
8649 pci_disable_device(pdev);
8650 pci_set_power_state(pdev, PCI_D3hot);
8651
8652 mutex_unlock(&priv->mutex);
8653
8654 return 0;
8655 }
8656
8657 static void iwl_resume(struct iwl_priv *priv)
8658 {
8659 unsigned long flags;
8660
8661 /* The following it a temporary work around due to the
8662 * suspend / resume not fully initializing the NIC correctly.
8663 * Without all of the following, resume will not attempt to take
8664 * down the NIC (it shouldn't really need to) and will just try
8665 * and bring the NIC back up. However that fails during the
8666 * ucode verification process. This then causes iwl_down to be
8667 * called *after* iwl_hw_nic_init() has succeeded -- which
8668 * then lets the next init sequence succeed. So, we've
8669 * replicated all of that NIC init code here... */
8670
8671 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8672
8673 iwl_hw_nic_init(priv);
8674
8675 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8676 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8677 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8678 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8679 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8680 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8681
8682 /* tell the device to stop sending interrupts */
8683 iwl_disable_interrupts(priv);
8684
8685 spin_lock_irqsave(&priv->lock, flags);
8686 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8687
8688 if (!iwl_grab_restricted_access(priv)) {
8689 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8690 APMG_CLK_VAL_DMA_CLK_RQT);
8691 iwl_release_restricted_access(priv);
8692 }
8693 spin_unlock_irqrestore(&priv->lock, flags);
8694
8695 udelay(5);
8696
8697 iwl_hw_nic_reset(priv);
8698
8699 /* Bring the device back up */
8700 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8701 queue_work(priv->workqueue, &priv->up);
8702 }
8703
8704 static int iwl_pci_resume(struct pci_dev *pdev)
8705 {
8706 struct iwl_priv *priv = pci_get_drvdata(pdev);
8707 int err;
8708
8709 printk(KERN_INFO "Coming out of suspend...\n");
8710
8711 mutex_lock(&priv->mutex);
8712
8713 pci_set_power_state(pdev, PCI_D0);
8714 err = pci_enable_device(pdev);
8715 pci_restore_state(pdev);
8716
8717 /*
8718 * Suspend/Resume resets the PCI configuration space, so we have to
8719 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8720 * from interfering with C3 CPU state. pci_restore_state won't help
8721 * here since it only restores the first 64 bytes pci config header.
8722 */
8723 pci_write_config_byte(pdev, 0x41, 0x00);
8724
8725 iwl_resume(priv);
8726 mutex_unlock(&priv->mutex);
8727
8728 return 0;
8729 }
8730
8731 #endif /* CONFIG_PM */
8732
8733 /*****************************************************************************
8734 *
8735 * driver and module entry point
8736 *
8737 *****************************************************************************/
8738
8739 static struct pci_driver iwl_driver = {
8740 .name = DRV_NAME,
8741 .id_table = iwl_hw_card_ids,
8742 .probe = iwl_pci_probe,
8743 .remove = __devexit_p(iwl_pci_remove),
8744 #ifdef CONFIG_PM
8745 .suspend = iwl_pci_suspend,
8746 .resume = iwl_pci_resume,
8747 #endif
8748 };
8749
8750 static int __init iwl_init(void)
8751 {
8752
8753 int ret;
8754 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8755 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8756 ret = pci_register_driver(&iwl_driver);
8757 if (ret) {
8758 IWL_ERROR("Unable to initialize PCI module\n");
8759 return ret;
8760 }
8761 #ifdef CONFIG_IWLWIFI_DEBUG
8762 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8763 if (ret) {
8764 IWL_ERROR("Unable to create driver sysfs file\n");
8765 pci_unregister_driver(&iwl_driver);
8766 return ret;
8767 }
8768 #endif
8769
8770 return ret;
8771 }
8772
8773 static void __exit iwl_exit(void)
8774 {
8775 #ifdef CONFIG_IWLWIFI_DEBUG
8776 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8777 #endif
8778 pci_unregister_driver(&iwl_driver);
8779 }
8780
8781 module_param_named(antenna, iwl_param_antenna, int, 0444);
8782 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8783 module_param_named(disable, iwl_param_disable, int, 0444);
8784 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8785 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8786 MODULE_PARM_DESC(hwcrypto,
8787 "using hardware crypto engine (default 0 [software])\n");
8788 module_param_named(debug, iwl_param_debug, int, 0444);
8789 MODULE_PARM_DESC(debug, "debug output mask");
8790 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8791 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8792
8793 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8794 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8795
8796 /* QoS */
8797 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8798 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8799
8800 module_exit(iwl_exit);
8801 module_init(iwl_init);
kernel source for telekom puls (alcatel/mediatek)