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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl4965-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 4965
60
61 #include "iwlwifi.h"
62 #include "iwl-4965.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 "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
90
91 #ifdef CONFIG_IWLWIFI_DEBUG
92 #define VD "d"
93 #else
94 #define VD
95 #endif
96
97 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
98 #define VS "s"
99 #else
100 #define VS
101 #endif
102
103 #define IWLWIFI_VERSION "1.1.17k" VD VS
104 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
105 #define DRV_VERSION IWLWIFI_VERSION
106
107 /* Change firmware file name, using "-" and incrementing number,
108 * *only* when uCode interface or architecture changes so that it
109 * is not compatible with earlier drivers.
110 * This number will also appear in << 8 position of 1st dword of uCode file */
111 #define IWL4965_UCODE_API "-1"
112
113 MODULE_DESCRIPTION(DRV_DESCRIPTION);
114 MODULE_VERSION(DRV_VERSION);
115 MODULE_AUTHOR(DRV_COPYRIGHT);
116 MODULE_LICENSE("GPL");
117
118 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
119 {
120 u16 fc = le16_to_cpu(hdr->frame_control);
121 int hdr_len = ieee80211_get_hdrlen(fc);
122
123 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
124 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
125 return NULL;
126 }
127
128 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
129 struct iwl_priv *priv, int mode)
130 {
131 int i;
132
133 for (i = 0; i < 3; i++)
134 if (priv->modes[i].mode == mode)
135 return &priv->modes[i];
136
137 return NULL;
138 }
139
140 static int iwl_is_empty_essid(const char *essid, int essid_len)
141 {
142 /* Single white space is for Linksys APs */
143 if (essid_len == 1 && essid[0] == ' ')
144 return 1;
145
146 /* Otherwise, if the entire essid is 0, we assume it is hidden */
147 while (essid_len) {
148 essid_len--;
149 if (essid[essid_len] != '\0')
150 return 0;
151 }
152
153 return 1;
154 }
155
156 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
157 {
158 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
159 const char *s = essid;
160 char *d = escaped;
161
162 if (iwl_is_empty_essid(essid, essid_len)) {
163 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
164 return escaped;
165 }
166
167 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
168 while (essid_len--) {
169 if (*s == '\0') {
170 *d++ = '\\';
171 *d++ = '0';
172 s++;
173 } else
174 *d++ = *s++;
175 }
176 *d = '\0';
177 return escaped;
178 }
179
180 static void iwl_print_hex_dump(int level, void *p, u32 len)
181 {
182 #ifdef CONFIG_IWLWIFI_DEBUG
183 if (!(iwl_debug_level & level))
184 return;
185
186 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
187 p, len, 1);
188 #endif
189 }
190
191 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
192 * DMA services
193 *
194 * Theory of operation
195 *
196 * A queue is a circular buffers with 'Read' and 'Write' pointers.
197 * 2 empty entries always kept in the buffer to protect from overflow.
198 *
199 * For Tx queue, there are low mark and high mark limits. If, after queuing
200 * the packet for Tx, free space become < low mark, Tx queue stopped. When
201 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
202 * Tx queue resumed.
203 *
204 * The IWL operates with six queues, one receive queue in the device's
205 * sram, one transmit queue for sending commands to the device firmware,
206 * and four transmit queues for data.
207 ***************************************************/
208
209 static int iwl_queue_space(const struct iwl_queue *q)
210 {
211 int s = q->last_used - q->first_empty;
212
213 if (q->last_used > q->first_empty)
214 s -= q->n_bd;
215
216 if (s <= 0)
217 s += q->n_window;
218 /* keep some reserve to not confuse empty and full situations */
219 s -= 2;
220 if (s < 0)
221 s = 0;
222 return s;
223 }
224
225 /* XXX: n_bd must be power-of-two size */
226 static inline int iwl_queue_inc_wrap(int index, int n_bd)
227 {
228 return ++index & (n_bd - 1);
229 }
230
231 /* XXX: n_bd must be power-of-two size */
232 static inline int iwl_queue_dec_wrap(int index, int n_bd)
233 {
234 return --index & (n_bd - 1);
235 }
236
237 static inline int x2_queue_used(const struct iwl_queue *q, int i)
238 {
239 return q->first_empty > q->last_used ?
240 (i >= q->last_used && i < q->first_empty) :
241 !(i < q->last_used && i >= q->first_empty);
242 }
243
244 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
245 {
246 if (is_huge)
247 return q->n_window;
248
249 return index & (q->n_window - 1);
250 }
251
252 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
253 int count, int slots_num, u32 id)
254 {
255 q->n_bd = count;
256 q->n_window = slots_num;
257 q->id = id;
258
259 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
260 * and iwl_queue_dec_wrap are broken. */
261 BUG_ON(!is_power_of_2(count));
262
263 /* slots_num must be power-of-two size, otherwise
264 * get_cmd_index is broken. */
265 BUG_ON(!is_power_of_2(slots_num));
266
267 q->low_mark = q->n_window / 4;
268 if (q->low_mark < 4)
269 q->low_mark = 4;
270
271 q->high_mark = q->n_window / 8;
272 if (q->high_mark < 2)
273 q->high_mark = 2;
274
275 q->first_empty = q->last_used = 0;
276
277 return 0;
278 }
279
280 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
281 struct iwl_tx_queue *txq, u32 id)
282 {
283 struct pci_dev *dev = priv->pci_dev;
284
285 if (id != IWL_CMD_QUEUE_NUM) {
286 txq->txb = kmalloc(sizeof(txq->txb[0]) *
287 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
288 if (!txq->txb) {
289 IWL_ERROR("kmalloc for auxilary BD "
290 "structures failed\n");
291 goto error;
292 }
293 } else
294 txq->txb = NULL;
295
296 txq->bd = pci_alloc_consistent(dev,
297 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
298 &txq->q.dma_addr);
299
300 if (!txq->bd) {
301 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
302 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
303 goto error;
304 }
305 txq->q.id = id;
306
307 return 0;
308
309 error:
310 if (txq->txb) {
311 kfree(txq->txb);
312 txq->txb = NULL;
313 }
314
315 return -ENOMEM;
316 }
317
318 int iwl_tx_queue_init(struct iwl_priv *priv,
319 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
320 {
321 struct pci_dev *dev = priv->pci_dev;
322 int len;
323 int rc = 0;
324
325 /* alocate command space + one big command for scan since scan
326 * command is very huge the system will not have two scan at the
327 * same time */
328 len = sizeof(struct iwl_cmd) * slots_num;
329 if (txq_id == IWL_CMD_QUEUE_NUM)
330 len += IWL_MAX_SCAN_SIZE;
331 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
332 if (!txq->cmd)
333 return -ENOMEM;
334
335 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
336 if (rc) {
337 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
338
339 return -ENOMEM;
340 }
341 txq->need_update = 0;
342
343 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
344 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
345 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
346 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
347
348 iwl_hw_tx_queue_init(priv, txq);
349
350 return 0;
351 }
352
353 /**
354 * iwl_tx_queue_free - Deallocate DMA queue.
355 * @txq: Transmit queue to deallocate.
356 *
357 * Empty queue by removing and destroying all BD's.
358 * Free all buffers. txq itself is not freed.
359 *
360 */
361 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
362 {
363 struct iwl_queue *q = &txq->q;
364 struct pci_dev *dev = priv->pci_dev;
365 int len;
366
367 if (q->n_bd == 0)
368 return;
369
370 /* first, empty all BD's */
371 for (; q->first_empty != q->last_used;
372 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
373 iwl_hw_txq_free_tfd(priv, txq);
374
375 len = sizeof(struct iwl_cmd) * q->n_window;
376 if (q->id == IWL_CMD_QUEUE_NUM)
377 len += IWL_MAX_SCAN_SIZE;
378
379 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
380
381 /* free buffers belonging to queue itself */
382 if (txq->q.n_bd)
383 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
384 txq->q.n_bd, txq->bd, txq->q.dma_addr);
385
386 if (txq->txb) {
387 kfree(txq->txb);
388 txq->txb = NULL;
389 }
390
391 /* 0 fill whole structure */
392 memset(txq, 0, sizeof(*txq));
393 }
394
395 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
396
397 /*************** STATION TABLE MANAGEMENT ****
398 *
399 * NOTE: This needs to be overhauled to better synchronize between
400 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
401 *
402 * mac80211 should also be examined to determine if sta_info is duplicating
403 * the functionality provided here
404 */
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
446 static void iwl_clear_stations_table(struct iwl_priv *priv)
447 {
448 unsigned long flags;
449
450 spin_lock_irqsave(&priv->sta_lock, flags);
451
452 priv->num_stations = 0;
453 memset(priv->stations, 0, sizeof(priv->stations));
454
455 spin_unlock_irqrestore(&priv->sta_lock, flags);
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
466 spin_lock_irqsave(&priv->sta_lock, flags_spin);
467 if (is_ap)
468 index = IWL_AP_ID;
469 else if (is_broadcast_ether_addr(addr))
470 index = priv->hw_setting.bcast_sta_id;
471 else
472 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
473 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
474 addr)) {
475 index = i;
476 break;
477 }
478
479 if (!priv->stations[i].used &&
480 index == IWL_INVALID_STATION)
481 index = i;
482 }
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
499 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
500 station = &priv->stations[index];
501 station->used = 1;
502 priv->num_stations++;
503
504 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
505 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
506 station->sta.mode = 0;
507 station->sta.sta.sta_id = index;
508 station->sta.station_flags = 0;
509
510 #ifdef CONFIG_IWLWIFI_HT
511 /* BCAST station and IBSS stations do not work in HT mode */
512 if (index != priv->hw_setting.bcast_sta_id &&
513 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
514 iwl4965_set_ht_add_station(priv, index);
515 #endif /*CONFIG_IWLWIFI_HT*/
516
517 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
518 iwl_send_add_station(priv, &station->sta, flags);
519 return index;
520
521 }
522
523 /*************** DRIVER STATUS FUNCTIONS *****/
524
525 static inline int iwl_is_ready(struct iwl_priv *priv)
526 {
527 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
528 * set but EXIT_PENDING is not */
529 return test_bit(STATUS_READY, &priv->status) &&
530 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
531 !test_bit(STATUS_EXIT_PENDING, &priv->status);
532 }
533
534 static inline int iwl_is_alive(struct iwl_priv *priv)
535 {
536 return test_bit(STATUS_ALIVE, &priv->status);
537 }
538
539 static inline int iwl_is_init(struct iwl_priv *priv)
540 {
541 return test_bit(STATUS_INIT, &priv->status);
542 }
543
544 static inline int iwl_is_rfkill(struct iwl_priv *priv)
545 {
546 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
547 test_bit(STATUS_RF_KILL_SW, &priv->status);
548 }
549
550 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
551 {
552
553 if (iwl_is_rfkill(priv))
554 return 0;
555
556 return iwl_is_ready(priv);
557 }
558
559 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
560
561 #define IWL_CMD(x) case x : return #x
562
563 static const char *get_cmd_string(u8 cmd)
564 {
565 switch (cmd) {
566 IWL_CMD(REPLY_ALIVE);
567 IWL_CMD(REPLY_ERROR);
568 IWL_CMD(REPLY_RXON);
569 IWL_CMD(REPLY_RXON_ASSOC);
570 IWL_CMD(REPLY_QOS_PARAM);
571 IWL_CMD(REPLY_RXON_TIMING);
572 IWL_CMD(REPLY_ADD_STA);
573 IWL_CMD(REPLY_REMOVE_STA);
574 IWL_CMD(REPLY_REMOVE_ALL_STA);
575 IWL_CMD(REPLY_TX);
576 IWL_CMD(REPLY_RATE_SCALE);
577 IWL_CMD(REPLY_LEDS_CMD);
578 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
579 IWL_CMD(RADAR_NOTIFICATION);
580 IWL_CMD(REPLY_QUIET_CMD);
581 IWL_CMD(REPLY_CHANNEL_SWITCH);
582 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
583 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
584 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
585 IWL_CMD(POWER_TABLE_CMD);
586 IWL_CMD(PM_SLEEP_NOTIFICATION);
587 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
588 IWL_CMD(REPLY_SCAN_CMD);
589 IWL_CMD(REPLY_SCAN_ABORT_CMD);
590 IWL_CMD(SCAN_START_NOTIFICATION);
591 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
592 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
593 IWL_CMD(BEACON_NOTIFICATION);
594 IWL_CMD(REPLY_TX_BEACON);
595 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
596 IWL_CMD(QUIET_NOTIFICATION);
597 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
598 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
599 IWL_CMD(REPLY_BT_CONFIG);
600 IWL_CMD(REPLY_STATISTICS_CMD);
601 IWL_CMD(STATISTICS_NOTIFICATION);
602 IWL_CMD(REPLY_CARD_STATE_CMD);
603 IWL_CMD(CARD_STATE_NOTIFICATION);
604 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
605 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
606 IWL_CMD(SENSITIVITY_CMD);
607 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
608 IWL_CMD(REPLY_RX_PHY_CMD);
609 IWL_CMD(REPLY_RX_MPDU_CMD);
610 IWL_CMD(REPLY_4965_RX);
611 IWL_CMD(REPLY_COMPRESSED_BA);
612 default:
613 return "UNKNOWN";
614
615 }
616 }
617
618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
619
620 /**
621 * iwl_enqueue_hcmd - enqueue a uCode command
622 * @priv: device private data point
623 * @cmd: a point to the ucode command structure
624 *
625 * The function returns < 0 values to indicate the operation is
626 * failed. On success, it turns the index (> 0) of command in the
627 * command queue.
628 */
629 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
630 {
631 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
632 struct iwl_queue *q = &txq->q;
633 struct iwl_tfd_frame *tfd;
634 u32 *control_flags;
635 struct iwl_cmd *out_cmd;
636 u32 idx;
637 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
638 dma_addr_t phys_addr;
639 int ret;
640 unsigned long flags;
641
642 /* If any of the command structures end up being larger than
643 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
644 * we will need to increase the size of the TFD entries */
645 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
646 !(cmd->meta.flags & CMD_SIZE_HUGE));
647
648 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
649 IWL_ERROR("No space for Tx\n");
650 return -ENOSPC;
651 }
652
653 spin_lock_irqsave(&priv->hcmd_lock, flags);
654
655 tfd = &txq->bd[q->first_empty];
656 memset(tfd, 0, sizeof(*tfd));
657
658 control_flags = (u32 *) tfd;
659
660 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
661 out_cmd = &txq->cmd[idx];
662
663 out_cmd->hdr.cmd = cmd->id;
664 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
665 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
666
667 /* At this point, the out_cmd now has all of the incoming cmd
668 * information */
669
670 out_cmd->hdr.flags = 0;
671 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
672 INDEX_TO_SEQ(q->first_empty));
673 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
674 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
675
676 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
677 offsetof(struct iwl_cmd, hdr);
678 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
679
680 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
681 "%d bytes at %d[%d]:%d\n",
682 get_cmd_string(out_cmd->hdr.cmd),
683 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
684 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
685
686 txq->need_update = 1;
687 ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
688 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
689 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_rxon_add_station - add station into station table.
848 *
849 * there is only one AP station with id= IWL_AP_ID
850 * NOTE: mutex must be held before calling the this fnction
851 */
852 static int iwl_rxon_add_station(struct iwl_priv *priv,
853 const u8 *addr, int is_ap)
854 {
855 u8 sta_id;
856
857 sta_id = iwl_add_station(priv, addr, is_ap, 0);
858 iwl4965_add_station(priv, addr, is_ap);
859
860 return sta_id;
861 }
862
863 /**
864 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
865 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
866 * @channel: Any channel valid for the requested phymode
867
868 * In addition to setting the staging RXON, priv->phymode is also set.
869 *
870 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
871 * in the staging RXON flag structure based on the phymode
872 */
873 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
874 {
875 if (!iwl_get_channel_info(priv, phymode, channel)) {
876 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
877 channel, phymode);
878 return -EINVAL;
879 }
880
881 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
882 (priv->phymode == phymode))
883 return 0;
884
885 priv->staging_rxon.channel = cpu_to_le16(channel);
886 if (phymode == MODE_IEEE80211A)
887 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
888 else
889 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
890
891 priv->phymode = phymode;
892
893 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
894
895 return 0;
896 }
897
898 /**
899 * iwl_check_rxon_cmd - validate RXON structure is valid
900 *
901 * NOTE: This is really only useful during development and can eventually
902 * be #ifdef'd out once the driver is stable and folks aren't actively
903 * making changes
904 */
905 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
906 {
907 int error = 0;
908 int counter = 1;
909
910 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
911 error |= le32_to_cpu(rxon->flags &
912 (RXON_FLG_TGJ_NARROW_BAND_MSK |
913 RXON_FLG_RADAR_DETECT_MSK));
914 if (error)
915 IWL_WARNING("check 24G fields %d | %d\n",
916 counter++, error);
917 } else {
918 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
919 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
920 if (error)
921 IWL_WARNING("check 52 fields %d | %d\n",
922 counter++, error);
923 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
924 if (error)
925 IWL_WARNING("check 52 CCK %d | %d\n",
926 counter++, error);
927 }
928 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
929 if (error)
930 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
931
932 /* make sure basic rates 6Mbps and 1Mbps are supported */
933 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
934 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
935 if (error)
936 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
937
938 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
939 if (error)
940 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
941
942 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
943 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
944 if (error)
945 IWL_WARNING("check CCK and short slot %d | %d\n",
946 counter++, error);
947
948 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
949 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
950 if (error)
951 IWL_WARNING("check CCK & auto detect %d | %d\n",
952 counter++, error);
953
954 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
955 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
956 if (error)
957 IWL_WARNING("check TGG and auto detect %d | %d\n",
958 counter++, error);
959
960 if (error)
961 IWL_WARNING("Tuning to channel %d\n",
962 le16_to_cpu(rxon->channel));
963
964 if (error) {
965 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
966 return -1;
967 }
968 return 0;
969 }
970
971 /**
972 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
973 * @priv: staging_rxon is comapred to active_rxon
974 *
975 * If the RXON structure is changing sufficient to require a new
976 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
977 * to indicate a new tune is required.
978 */
979 static int iwl_full_rxon_required(struct iwl_priv *priv)
980 {
981
982 /* These items are only settable from the full RXON command */
983 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
984 compare_ether_addr(priv->staging_rxon.bssid_addr,
985 priv->active_rxon.bssid_addr) ||
986 compare_ether_addr(priv->staging_rxon.node_addr,
987 priv->active_rxon.node_addr) ||
988 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
989 priv->active_rxon.wlap_bssid_addr) ||
990 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
991 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
992 (priv->staging_rxon.air_propagation !=
993 priv->active_rxon.air_propagation) ||
994 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
995 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
996 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
997 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
998 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
999 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1000 return 1;
1001
1002 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1003 * be updated with the RXON_ASSOC command -- however only some
1004 * flag transitions are allowed using RXON_ASSOC */
1005
1006 /* Check if we are not switching bands */
1007 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1008 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1009 return 1;
1010
1011 /* Check if we are switching association toggle */
1012 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1013 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1014 return 1;
1015
1016 return 0;
1017 }
1018
1019 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1020 {
1021 int rc = 0;
1022 struct iwl_rx_packet *res = NULL;
1023 struct iwl_rxon_assoc_cmd rxon_assoc;
1024 struct iwl_host_cmd cmd = {
1025 .id = REPLY_RXON_ASSOC,
1026 .len = sizeof(rxon_assoc),
1027 .meta.flags = CMD_WANT_SKB,
1028 .data = &rxon_assoc,
1029 };
1030 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1031 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1032
1033 if ((rxon1->flags == rxon2->flags) &&
1034 (rxon1->filter_flags == rxon2->filter_flags) &&
1035 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1036 (rxon1->ofdm_ht_single_stream_basic_rates ==
1037 rxon2->ofdm_ht_single_stream_basic_rates) &&
1038 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1039 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1040 (rxon1->rx_chain == rxon2->rx_chain) &&
1041 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1042 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1043 return 0;
1044 }
1045
1046 rxon_assoc.flags = priv->staging_rxon.flags;
1047 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1048 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1049 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1050 rxon_assoc.reserved = 0;
1051 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1052 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1053 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1054 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1055 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1056
1057 rc = iwl_send_cmd_sync(priv, &cmd);
1058 if (rc)
1059 return rc;
1060
1061 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1062 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1063 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1064 rc = -EIO;
1065 }
1066
1067 priv->alloc_rxb_skb--;
1068 dev_kfree_skb_any(cmd.meta.u.skb);
1069
1070 return rc;
1071 }
1072
1073 /**
1074 * iwl_commit_rxon - commit staging_rxon to hardware
1075 *
1076 * The RXON command in staging_rxon is commited to the hardware and
1077 * the active_rxon structure is updated with the new data. This
1078 * function correctly transitions out of the RXON_ASSOC_MSK state if
1079 * a HW tune is required based on the RXON structure changes.
1080 */
1081 static int iwl_commit_rxon(struct iwl_priv *priv)
1082 {
1083 /* cast away the const for active_rxon in this function */
1084 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1085 DECLARE_MAC_BUF(mac);
1086 int rc = 0;
1087
1088 if (!iwl_is_alive(priv))
1089 return -1;
1090
1091 /* always get timestamp with Rx frame */
1092 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1093
1094 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1095 if (rc) {
1096 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1097 return -EINVAL;
1098 }
1099
1100 /* If we don't need to send a full RXON, we can use
1101 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1102 * and other flags for the current radio configuration. */
1103 if (!iwl_full_rxon_required(priv)) {
1104 rc = iwl_send_rxon_assoc(priv);
1105 if (rc) {
1106 IWL_ERROR("Error setting RXON_ASSOC "
1107 "configuration (%d).\n", rc);
1108 return rc;
1109 }
1110
1111 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1112
1113 return 0;
1114 }
1115
1116 /* station table will be cleared */
1117 priv->assoc_station_added = 0;
1118
1119 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1120 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1121 if (!priv->error_recovering)
1122 priv->start_calib = 0;
1123
1124 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1125 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1126
1127 /* If we are currently associated and the new config requires
1128 * an RXON_ASSOC and the new config wants the associated mask enabled,
1129 * we must clear the associated from the active configuration
1130 * before we apply the new config */
1131 if (iwl_is_associated(priv) &&
1132 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1133 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1134 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1135
1136 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1137 sizeof(struct iwl_rxon_cmd),
1138 &priv->active_rxon);
1139
1140 /* If the mask clearing failed then we set
1141 * active_rxon back to what it was previously */
1142 if (rc) {
1143 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1144 IWL_ERROR("Error clearing ASSOC_MSK on current "
1145 "configuration (%d).\n", rc);
1146 return rc;
1147 }
1148 }
1149
1150 IWL_DEBUG_INFO("Sending RXON\n"
1151 "* with%s RXON_FILTER_ASSOC_MSK\n"
1152 "* channel = %d\n"
1153 "* bssid = %s\n",
1154 ((priv->staging_rxon.filter_flags &
1155 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1156 le16_to_cpu(priv->staging_rxon.channel),
1157 print_mac(mac, priv->staging_rxon.bssid_addr));
1158
1159 /* Apply the new configuration */
1160 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1161 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1162 if (rc) {
1163 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1164 return rc;
1165 }
1166
1167 iwl_clear_stations_table(priv);
1168
1169 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1170 if (!priv->error_recovering)
1171 priv->start_calib = 0;
1172
1173 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1174 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1175 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1176
1177 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1178
1179 /* If we issue a new RXON command which required a tune then we must
1180 * send a new TXPOWER command or we won't be able to Tx any frames */
1181 rc = iwl_hw_reg_send_txpower(priv);
1182 if (rc) {
1183 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1184 return rc;
1185 }
1186
1187 /* Add the broadcast address so we can send broadcast frames */
1188 if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1189 IWL_INVALID_STATION) {
1190 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1191 return -EIO;
1192 }
1193
1194 /* If we have set the ASSOC_MSK and we are in BSS mode then
1195 * add the IWL_AP_ID to the station rate table */
1196 if (iwl_is_associated(priv) &&
1197 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1198 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1199 == IWL_INVALID_STATION) {
1200 IWL_ERROR("Error adding AP address for transmit.\n");
1201 return -EIO;
1202 }
1203 priv->assoc_station_added = 1;
1204 }
1205
1206 return 0;
1207 }
1208
1209 static int iwl_send_bt_config(struct iwl_priv *priv)
1210 {
1211 struct iwl_bt_cmd bt_cmd = {
1212 .flags = 3,
1213 .lead_time = 0xAA,
1214 .max_kill = 1,
1215 .kill_ack_mask = 0,
1216 .kill_cts_mask = 0,
1217 };
1218
1219 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1220 sizeof(struct iwl_bt_cmd), &bt_cmd);
1221 }
1222
1223 static int iwl_send_scan_abort(struct iwl_priv *priv)
1224 {
1225 int rc = 0;
1226 struct iwl_rx_packet *res;
1227 struct iwl_host_cmd cmd = {
1228 .id = REPLY_SCAN_ABORT_CMD,
1229 .meta.flags = CMD_WANT_SKB,
1230 };
1231
1232 /* If there isn't a scan actively going on in the hardware
1233 * then we are in between scan bands and not actually
1234 * actively scanning, so don't send the abort command */
1235 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1236 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1237 return 0;
1238 }
1239
1240 rc = iwl_send_cmd_sync(priv, &cmd);
1241 if (rc) {
1242 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1243 return rc;
1244 }
1245
1246 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1247 if (res->u.status != CAN_ABORT_STATUS) {
1248 /* The scan abort will return 1 for success or
1249 * 2 for "failure". A failure condition can be
1250 * due to simply not being in an active scan which
1251 * can occur if we send the scan abort before we
1252 * the microcode has notified us that a scan is
1253 * completed. */
1254 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1255 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1256 clear_bit(STATUS_SCAN_HW, &priv->status);
1257 }
1258
1259 dev_kfree_skb_any(cmd.meta.u.skb);
1260
1261 return rc;
1262 }
1263
1264 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1265 struct iwl_cmd *cmd,
1266 struct sk_buff *skb)
1267 {
1268 return 1;
1269 }
1270
1271 /*
1272 * CARD_STATE_CMD
1273 *
1274 * Use: Sets the internal card state to enable, disable, or halt
1275 *
1276 * When in the 'enable' state the card operates as normal.
1277 * When in the 'disable' state, the card enters into a low power mode.
1278 * When in the 'halt' state, the card is shut down and must be fully
1279 * restarted to come back on.
1280 */
1281 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1282 {
1283 struct iwl_host_cmd cmd = {
1284 .id = REPLY_CARD_STATE_CMD,
1285 .len = sizeof(u32),
1286 .data = &flags,
1287 .meta.flags = meta_flag,
1288 };
1289
1290 if (meta_flag & CMD_ASYNC)
1291 cmd.meta.u.callback = iwl_card_state_sync_callback;
1292
1293 return iwl_send_cmd(priv, &cmd);
1294 }
1295
1296 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1297 struct iwl_cmd *cmd, struct sk_buff *skb)
1298 {
1299 struct iwl_rx_packet *res = NULL;
1300
1301 if (!skb) {
1302 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1303 return 1;
1304 }
1305
1306 res = (struct iwl_rx_packet *)skb->data;
1307 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1308 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1309 res->hdr.flags);
1310 return 1;
1311 }
1312
1313 switch (res->u.add_sta.status) {
1314 case ADD_STA_SUCCESS_MSK:
1315 break;
1316 default:
1317 break;
1318 }
1319
1320 /* We didn't cache the SKB; let the caller free it */
1321 return 1;
1322 }
1323
1324 int iwl_send_add_station(struct iwl_priv *priv,
1325 struct iwl_addsta_cmd *sta, u8 flags)
1326 {
1327 struct iwl_rx_packet *res = NULL;
1328 int rc = 0;
1329 struct iwl_host_cmd cmd = {
1330 .id = REPLY_ADD_STA,
1331 .len = sizeof(struct iwl_addsta_cmd),
1332 .meta.flags = flags,
1333 .data = sta,
1334 };
1335
1336 if (flags & CMD_ASYNC)
1337 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1338 else
1339 cmd.meta.flags |= CMD_WANT_SKB;
1340
1341 rc = iwl_send_cmd(priv, &cmd);
1342
1343 if (rc || (flags & CMD_ASYNC))
1344 return rc;
1345
1346 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1347 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1348 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1349 res->hdr.flags);
1350 rc = -EIO;
1351 }
1352
1353 if (rc == 0) {
1354 switch (res->u.add_sta.status) {
1355 case ADD_STA_SUCCESS_MSK:
1356 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1357 break;
1358 default:
1359 rc = -EIO;
1360 IWL_WARNING("REPLY_ADD_STA failed\n");
1361 break;
1362 }
1363 }
1364
1365 priv->alloc_rxb_skb--;
1366 dev_kfree_skb_any(cmd.meta.u.skb);
1367
1368 return rc;
1369 }
1370
1371 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1372 struct ieee80211_key_conf *keyconf,
1373 u8 sta_id)
1374 {
1375 unsigned long flags;
1376 __le16 key_flags = 0;
1377
1378 switch (keyconf->alg) {
1379 case ALG_CCMP:
1380 key_flags |= STA_KEY_FLG_CCMP;
1381 key_flags |= cpu_to_le16(
1382 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1383 key_flags &= ~STA_KEY_FLG_INVALID;
1384 break;
1385 case ALG_TKIP:
1386 case ALG_WEP:
1387 return -EINVAL;
1388 default:
1389 return -EINVAL;
1390 }
1391 spin_lock_irqsave(&priv->sta_lock, flags);
1392 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1393 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1394 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1395 keyconf->keylen);
1396
1397 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1398 keyconf->keylen);
1399 priv->stations[sta_id].sta.key.key_flags = key_flags;
1400 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1401 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1402
1403 spin_unlock_irqrestore(&priv->sta_lock, flags);
1404
1405 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1406 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1407 return 0;
1408 }
1409
1410 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1411 {
1412 unsigned long flags;
1413
1414 spin_lock_irqsave(&priv->sta_lock, flags);
1415 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1416 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1417 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1418 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1419 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1420 spin_unlock_irqrestore(&priv->sta_lock, flags);
1421
1422 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1423 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1424 return 0;
1425 }
1426
1427 static void iwl_clear_free_frames(struct iwl_priv *priv)
1428 {
1429 struct list_head *element;
1430
1431 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1432 priv->frames_count);
1433
1434 while (!list_empty(&priv->free_frames)) {
1435 element = priv->free_frames.next;
1436 list_del(element);
1437 kfree(list_entry(element, struct iwl_frame, list));
1438 priv->frames_count--;
1439 }
1440
1441 if (priv->frames_count) {
1442 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1443 priv->frames_count);
1444 priv->frames_count = 0;
1445 }
1446 }
1447
1448 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1449 {
1450 struct iwl_frame *frame;
1451 struct list_head *element;
1452 if (list_empty(&priv->free_frames)) {
1453 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1454 if (!frame) {
1455 IWL_ERROR("Could not allocate frame!\n");
1456 return NULL;
1457 }
1458
1459 priv->frames_count++;
1460 return frame;
1461 }
1462
1463 element = priv->free_frames.next;
1464 list_del(element);
1465 return list_entry(element, struct iwl_frame, list);
1466 }
1467
1468 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1469 {
1470 memset(frame, 0, sizeof(*frame));
1471 list_add(&frame->list, &priv->free_frames);
1472 }
1473
1474 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1475 struct ieee80211_hdr *hdr,
1476 const u8 *dest, int left)
1477 {
1478
1479 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1480 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1481 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1482 return 0;
1483
1484 if (priv->ibss_beacon->len > left)
1485 return 0;
1486
1487 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1488
1489 return priv->ibss_beacon->len;
1490 }
1491
1492 int iwl_rate_index_from_plcp(int plcp)
1493 {
1494 int i = 0;
1495
1496 if (plcp & RATE_MCS_HT_MSK) {
1497 i = (plcp & 0xff);
1498
1499 if (i >= IWL_RATE_MIMO_6M_PLCP)
1500 i = i - IWL_RATE_MIMO_6M_PLCP;
1501
1502 i += IWL_FIRST_OFDM_RATE;
1503 /* skip 9M not supported in ht*/
1504 if (i >= IWL_RATE_9M_INDEX)
1505 i += 1;
1506 if ((i >= IWL_FIRST_OFDM_RATE) &&
1507 (i <= IWL_LAST_OFDM_RATE))
1508 return i;
1509 } else {
1510 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1511 if (iwl_rates[i].plcp == (plcp &0xFF))
1512 return i;
1513 }
1514 return -1;
1515 }
1516
1517 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1518 {
1519 u8 i;
1520
1521 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1522 i = iwl_rates[i].next_ieee) {
1523 if (rate_mask & (1 << i))
1524 return iwl_rates[i].plcp;
1525 }
1526
1527 return IWL_RATE_INVALID;
1528 }
1529
1530 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1531 {
1532 struct iwl_frame *frame;
1533 unsigned int frame_size;
1534 int rc;
1535 u8 rate;
1536
1537 frame = iwl_get_free_frame(priv);
1538
1539 if (!frame) {
1540 IWL_ERROR("Could not obtain free frame buffer for beacon "
1541 "command.\n");
1542 return -ENOMEM;
1543 }
1544
1545 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1546 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1547 0xFF0);
1548 if (rate == IWL_INVALID_RATE)
1549 rate = IWL_RATE_6M_PLCP;
1550 } else {
1551 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1552 if (rate == IWL_INVALID_RATE)
1553 rate = IWL_RATE_1M_PLCP;
1554 }
1555
1556 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1557
1558 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1559 &frame->u.cmd[0]);
1560
1561 iwl_free_frame(priv, frame);
1562
1563 return rc;
1564 }
1565
1566 /******************************************************************************
1567 *
1568 * EEPROM related functions
1569 *
1570 ******************************************************************************/
1571
1572 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1573 {
1574 memcpy(mac, priv->eeprom.mac_address, 6);
1575 }
1576
1577 /**
1578 * iwl_eeprom_init - read EEPROM contents
1579 *
1580 * Load the EEPROM from adapter into priv->eeprom
1581 *
1582 * NOTE: This routine uses the non-debug IO access functions.
1583 */
1584 int iwl_eeprom_init(struct iwl_priv *priv)
1585 {
1586 u16 *e = (u16 *)&priv->eeprom;
1587 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1588 u32 r;
1589 int sz = sizeof(priv->eeprom);
1590 int rc;
1591 int i;
1592 u16 addr;
1593
1594 /* The EEPROM structure has several padding buffers within it
1595 * and when adding new EEPROM maps is subject to programmer errors
1596 * which may be very difficult to identify without explicitly
1597 * checking the resulting size of the eeprom map. */
1598 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1599
1600 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1601 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1602 return -ENOENT;
1603 }
1604
1605 rc = iwl_eeprom_aqcuire_semaphore(priv);
1606 if (rc < 0) {
1607 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1608 return -ENOENT;
1609 }
1610
1611 /* eeprom is an array of 16bit values */
1612 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1613 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1614 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1615
1616 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1617 i += IWL_EEPROM_ACCESS_DELAY) {
1618 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1619 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1620 break;
1621 udelay(IWL_EEPROM_ACCESS_DELAY);
1622 }
1623
1624 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1625 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1626 rc = -ETIMEDOUT;
1627 goto done;
1628 }
1629 e[addr / 2] = le16_to_cpu(r >> 16);
1630 }
1631 rc = 0;
1632
1633 done:
1634 iwl_eeprom_release_semaphore(priv);
1635 return rc;
1636 }
1637
1638 /******************************************************************************
1639 *
1640 * Misc. internal state and helper functions
1641 *
1642 ******************************************************************************/
1643 #ifdef CONFIG_IWLWIFI_DEBUG
1644
1645 /**
1646 * iwl_report_frame - dump frame to syslog during debug sessions
1647 *
1648 * hack this function to show different aspects of received frames,
1649 * including selective frame dumps.
1650 * group100 parameter selects whether to show 1 out of 100 good frames.
1651 *
1652 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1653 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1654 * is 3945-specific and gives bad output for 4965. Need to split the
1655 * functionality, keep common stuff here.
1656 */
1657 void iwl_report_frame(struct iwl_priv *priv,
1658 struct iwl_rx_packet *pkt,
1659 struct ieee80211_hdr *header, int group100)
1660 {
1661 u32 to_us;
1662 u32 print_summary = 0;
1663 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1664 u32 hundred = 0;
1665 u32 dataframe = 0;
1666 u16 fc;
1667 u16 seq_ctl;
1668 u16 channel;
1669 u16 phy_flags;
1670 int rate_sym;
1671 u16 length;
1672 u16 status;
1673 u16 bcn_tmr;
1674 u32 tsf_low;
1675 u64 tsf;
1676 u8 rssi;
1677 u8 agc;
1678 u16 sig_avg;
1679 u16 noise_diff;
1680 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1681 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1682 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1683 u8 *data = IWL_RX_DATA(pkt);
1684
1685 /* MAC header */
1686 fc = le16_to_cpu(header->frame_control);
1687 seq_ctl = le16_to_cpu(header->seq_ctrl);
1688
1689 /* metadata */
1690 channel = le16_to_cpu(rx_hdr->channel);
1691 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1692 rate_sym = rx_hdr->rate;
1693 length = le16_to_cpu(rx_hdr->len);
1694
1695 /* end-of-frame status and timestamp */
1696 status = le32_to_cpu(rx_end->status);
1697 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1698 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1699 tsf = le64_to_cpu(rx_end->timestamp);
1700
1701 /* signal statistics */
1702 rssi = rx_stats->rssi;
1703 agc = rx_stats->agc;
1704 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1705 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1706
1707 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1708
1709 /* if data frame is to us and all is good,
1710 * (optionally) print summary for only 1 out of every 100 */
1711 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1712 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1713 dataframe = 1;
1714 if (!group100)
1715 print_summary = 1; /* print each frame */
1716 else if (priv->framecnt_to_us < 100) {
1717 priv->framecnt_to_us++;
1718 print_summary = 0;
1719 } else {
1720 priv->framecnt_to_us = 0;
1721 print_summary = 1;
1722 hundred = 1;
1723 }
1724 } else {
1725 /* print summary for all other frames */
1726 print_summary = 1;
1727 }
1728
1729 if (print_summary) {
1730 char *title;
1731 u32 rate;
1732
1733 if (hundred)
1734 title = "100Frames";
1735 else if (fc & IEEE80211_FCTL_RETRY)
1736 title = "Retry";
1737 else if (ieee80211_is_assoc_response(fc))
1738 title = "AscRsp";
1739 else if (ieee80211_is_reassoc_response(fc))
1740 title = "RasRsp";
1741 else if (ieee80211_is_probe_response(fc)) {
1742 title = "PrbRsp";
1743 print_dump = 1; /* dump frame contents */
1744 } else if (ieee80211_is_beacon(fc)) {
1745 title = "Beacon";
1746 print_dump = 1; /* dump frame contents */
1747 } else if (ieee80211_is_atim(fc))
1748 title = "ATIM";
1749 else if (ieee80211_is_auth(fc))
1750 title = "Auth";
1751 else if (ieee80211_is_deauth(fc))
1752 title = "DeAuth";
1753 else if (ieee80211_is_disassoc(fc))
1754 title = "DisAssoc";
1755 else
1756 title = "Frame";
1757
1758 rate = iwl_rate_index_from_plcp(rate_sym);
1759 if (rate == -1)
1760 rate = 0;
1761 else
1762 rate = iwl_rates[rate].ieee / 2;
1763
1764 /* print frame summary.
1765 * MAC addresses show just the last byte (for brevity),
1766 * but you can hack it to show more, if you'd like to. */
1767 if (dataframe)
1768 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1769 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1770 title, fc, header->addr1[5],
1771 length, rssi, channel, rate);
1772 else {
1773 /* src/dst addresses assume managed mode */
1774 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1775 "src=0x%02x, rssi=%u, tim=%lu usec, "
1776 "phy=0x%02x, chnl=%d\n",
1777 title, fc, header->addr1[5],
1778 header->addr3[5], rssi,
1779 tsf_low - priv->scan_start_tsf,
1780 phy_flags, channel);
1781 }
1782 }
1783 if (print_dump)
1784 iwl_print_hex_dump(IWL_DL_RX, data, length);
1785 }
1786 #endif
1787
1788 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1789 {
1790 if (priv->hw_setting.shared_virt)
1791 pci_free_consistent(priv->pci_dev,
1792 sizeof(struct iwl_shared),
1793 priv->hw_setting.shared_virt,
1794 priv->hw_setting.shared_phys);
1795 }
1796
1797 /**
1798 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1799 *
1800 * return : set the bit for each supported rate insert in ie
1801 */
1802 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1803 u16 basic_rate, int *left)
1804 {
1805 u16 ret_rates = 0, bit;
1806 int i;
1807 u8 *cnt = ie;
1808 u8 *rates = ie + 1;
1809
1810 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1811 if (bit & supported_rate) {
1812 ret_rates |= bit;
1813 rates[*cnt] = iwl_rates[i].ieee |
1814 ((bit & basic_rate) ? 0x80 : 0x00);
1815 (*cnt)++;
1816 (*left)--;
1817 if ((*left <= 0) ||
1818 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1819 break;
1820 }
1821 }
1822
1823 return ret_rates;
1824 }
1825
1826 #ifdef CONFIG_IWLWIFI_HT
1827 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1828 struct ieee80211_ht_capability *ht_cap,
1829 u8 use_wide_chan);
1830 #endif
1831
1832 /**
1833 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1834 */
1835 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1836 struct ieee80211_mgmt *frame,
1837 int left, int is_direct)
1838 {
1839 int len = 0;
1840 u8 *pos = NULL;
1841 u16 active_rates, ret_rates, cck_rates;
1842
1843 /* Make sure there is enough space for the probe request,
1844 * two mandatory IEs and the data */
1845 left -= 24;
1846 if (left < 0)
1847 return 0;
1848 len += 24;
1849
1850 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1851 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1852 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1853 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1854 frame->seq_ctrl = 0;
1855
1856 /* fill in our indirect SSID IE */
1857 /* ...next IE... */
1858
1859 left -= 2;
1860 if (left < 0)
1861 return 0;
1862 len += 2;
1863 pos = &(frame->u.probe_req.variable[0]);
1864 *pos++ = WLAN_EID_SSID;
1865 *pos++ = 0;
1866
1867 /* fill in our direct SSID IE... */
1868 if (is_direct) {
1869 /* ...next IE... */
1870 left -= 2 + priv->essid_len;
1871 if (left < 0)
1872 return 0;
1873 /* ... fill it in... */
1874 *pos++ = WLAN_EID_SSID;
1875 *pos++ = priv->essid_len;
1876 memcpy(pos, priv->essid, priv->essid_len);
1877 pos += priv->essid_len;
1878 len += 2 + priv->essid_len;
1879 }
1880
1881 /* fill in supported rate */
1882 /* ...next IE... */
1883 left -= 2;
1884 if (left < 0)
1885 return 0;
1886
1887 /* ... fill it in... */
1888 *pos++ = WLAN_EID_SUPP_RATES;
1889 *pos = 0;
1890
1891 priv->active_rate = priv->rates_mask;
1892 active_rates = priv->active_rate;
1893 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1894
1895 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1896 ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1897 priv->active_rate_basic, &left);
1898 active_rates &= ~ret_rates;
1899
1900 ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1901 priv->active_rate_basic, &left);
1902 active_rates &= ~ret_rates;
1903
1904 len += 2 + *pos;
1905 pos += (*pos) + 1;
1906 if (active_rates == 0)
1907 goto fill_end;
1908
1909 /* fill in supported extended rate */
1910 /* ...next IE... */
1911 left -= 2;
1912 if (left < 0)
1913 return 0;
1914 /* ... fill it in... */
1915 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1916 *pos = 0;
1917 iwl_supported_rate_to_ie(pos, active_rates,
1918 priv->active_rate_basic, &left);
1919 if (*pos > 0)
1920 len += 2 + *pos;
1921
1922 #ifdef CONFIG_IWLWIFI_HT
1923 if (is_direct && priv->is_ht_enabled) {
1924 u8 use_wide_chan = 1;
1925
1926 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1927 use_wide_chan = 0;
1928 pos += (*pos) + 1;
1929 *pos++ = WLAN_EID_HT_CAPABILITY;
1930 *pos++ = sizeof(struct ieee80211_ht_capability);
1931 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1932 use_wide_chan);
1933 len += 2 + sizeof(struct ieee80211_ht_capability);
1934 }
1935 #endif /*CONFIG_IWLWIFI_HT */
1936
1937 fill_end:
1938 return (u16)len;
1939 }
1940
1941 /*
1942 * QoS support
1943 */
1944 #ifdef CONFIG_IWLWIFI_QOS
1945 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1946 struct iwl_qosparam_cmd *qos)
1947 {
1948
1949 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1950 sizeof(struct iwl_qosparam_cmd), qos);
1951 }
1952
1953 static void iwl_reset_qos(struct iwl_priv *priv)
1954 {
1955 u16 cw_min = 15;
1956 u16 cw_max = 1023;
1957 u8 aifs = 2;
1958 u8 is_legacy = 0;
1959 unsigned long flags;
1960 int i;
1961
1962 spin_lock_irqsave(&priv->lock, flags);
1963 priv->qos_data.qos_active = 0;
1964
1965 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1966 if (priv->qos_data.qos_enable)
1967 priv->qos_data.qos_active = 1;
1968 if (!(priv->active_rate & 0xfff0)) {
1969 cw_min = 31;
1970 is_legacy = 1;
1971 }
1972 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1973 if (priv->qos_data.qos_enable)
1974 priv->qos_data.qos_active = 1;
1975 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1976 cw_min = 31;
1977 is_legacy = 1;
1978 }
1979
1980 if (priv->qos_data.qos_active)
1981 aifs = 3;
1982
1983 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1984 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1985 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1986 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1987 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1988
1989 if (priv->qos_data.qos_active) {
1990 i = 1;
1991 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1992 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1993 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1994 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1995 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1996
1997 i = 2;
1998 priv->qos_data.def_qos_parm.ac[i].cw_min =
1999 cpu_to_le16((cw_min + 1) / 2 - 1);
2000 priv->qos_data.def_qos_parm.ac[i].cw_max =
2001 cpu_to_le16(cw_max);
2002 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2003 if (is_legacy)
2004 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2005 cpu_to_le16(6016);
2006 else
2007 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2008 cpu_to_le16(3008);
2009 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2010
2011 i = 3;
2012 priv->qos_data.def_qos_parm.ac[i].cw_min =
2013 cpu_to_le16((cw_min + 1) / 4 - 1);
2014 priv->qos_data.def_qos_parm.ac[i].cw_max =
2015 cpu_to_le16((cw_max + 1) / 2 - 1);
2016 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2017 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2018 if (is_legacy)
2019 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2020 cpu_to_le16(3264);
2021 else
2022 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2023 cpu_to_le16(1504);
2024 } else {
2025 for (i = 1; i < 4; i++) {
2026 priv->qos_data.def_qos_parm.ac[i].cw_min =
2027 cpu_to_le16(cw_min);
2028 priv->qos_data.def_qos_parm.ac[i].cw_max =
2029 cpu_to_le16(cw_max);
2030 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2031 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2032 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2033 }
2034 }
2035 IWL_DEBUG_QOS("set QoS to default \n");
2036
2037 spin_unlock_irqrestore(&priv->lock, flags);
2038 }
2039
2040 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2041 {
2042 unsigned long flags;
2043
2044 if (priv == NULL)
2045 return;
2046
2047 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2048 return;
2049
2050 if (!priv->qos_data.qos_enable)
2051 return;
2052
2053 spin_lock_irqsave(&priv->lock, flags);
2054 priv->qos_data.def_qos_parm.qos_flags = 0;
2055
2056 if (priv->qos_data.qos_cap.q_AP.queue_request &&
2057 !priv->qos_data.qos_cap.q_AP.txop_request)
2058 priv->qos_data.def_qos_parm.qos_flags |=
2059 QOS_PARAM_FLG_TXOP_TYPE_MSK;
2060
2061 if (priv->qos_data.qos_active)
2062 priv->qos_data.def_qos_parm.qos_flags |=
2063 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2064
2065 spin_unlock_irqrestore(&priv->lock, flags);
2066
2067 if (force || iwl_is_associated(priv)) {
2068 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2069 priv->qos_data.qos_active);
2070
2071 iwl_send_qos_params_command(priv,
2072 &(priv->qos_data.def_qos_parm));
2073 }
2074 }
2075
2076 #endif /* CONFIG_IWLWIFI_QOS */
2077 /*
2078 * Power management (not Tx power!) functions
2079 */
2080 #define MSEC_TO_USEC 1024
2081
2082 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2083 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2084 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2085 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2086 __constant_cpu_to_le32(X1), \
2087 __constant_cpu_to_le32(X2), \
2088 __constant_cpu_to_le32(X3), \
2089 __constant_cpu_to_le32(X4)}
2090
2091
2092 /* default power management (not Tx power) table values */
2093 /* for tim 0-10 */
2094 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2095 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2096 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2097 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2098 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2099 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2100 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2101 };
2102
2103 /* for tim > 10 */
2104 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2105 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2106 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2107 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2108 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2109 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2110 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2111 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2112 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2113 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2114 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2115 };
2116
2117 int iwl_power_init_handle(struct iwl_priv *priv)
2118 {
2119 int rc = 0, i;
2120 struct iwl_power_mgr *pow_data;
2121 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2122 u16 pci_pm;
2123
2124 IWL_DEBUG_POWER("Initialize power \n");
2125
2126 pow_data = &(priv->power_data);
2127
2128 memset(pow_data, 0, sizeof(*pow_data));
2129
2130 pow_data->active_index = IWL_POWER_RANGE_0;
2131 pow_data->dtim_val = 0xffff;
2132
2133 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2134 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2135
2136 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2137 if (rc != 0)
2138 return 0;
2139 else {
2140 struct iwl_powertable_cmd *cmd;
2141
2142 IWL_DEBUG_POWER("adjust power command flags\n");
2143
2144 for (i = 0; i < IWL_POWER_AC; i++) {
2145 cmd = &pow_data->pwr_range_0[i].cmd;
2146
2147 if (pci_pm & 0x1)
2148 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2149 else
2150 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2151 }
2152 }
2153 return rc;
2154 }
2155
2156 static int iwl_update_power_cmd(struct iwl_priv *priv,
2157 struct iwl_powertable_cmd *cmd, u32 mode)
2158 {
2159 int rc = 0, i;
2160 u8 skip;
2161 u32 max_sleep = 0;
2162 struct iwl_power_vec_entry *range;
2163 u8 period = 0;
2164 struct iwl_power_mgr *pow_data;
2165
2166 if (mode > IWL_POWER_INDEX_5) {
2167 IWL_DEBUG_POWER("Error invalid power mode \n");
2168 return -1;
2169 }
2170 pow_data = &(priv->power_data);
2171
2172 if (pow_data->active_index == IWL_POWER_RANGE_0)
2173 range = &pow_data->pwr_range_0[0];
2174 else
2175 range = &pow_data->pwr_range_1[1];
2176
2177 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2178
2179 #ifdef IWL_MAC80211_DISABLE
2180 if (priv->assoc_network != NULL) {
2181 unsigned long flags;
2182
2183 period = priv->assoc_network->tim.tim_period;
2184 }
2185 #endif /*IWL_MAC80211_DISABLE */
2186 skip = range[mode].no_dtim;
2187
2188 if (period == 0) {
2189 period = 1;
2190 skip = 0;
2191 }
2192
2193 if (skip == 0) {
2194 max_sleep = period;
2195 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2196 } else {
2197 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2198 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2199 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2200 }
2201
2202 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2203 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2204 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2205 }
2206
2207 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2208 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2209 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2210 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2211 le32_to_cpu(cmd->sleep_interval[0]),
2212 le32_to_cpu(cmd->sleep_interval[1]),
2213 le32_to_cpu(cmd->sleep_interval[2]),
2214 le32_to_cpu(cmd->sleep_interval[3]),
2215 le32_to_cpu(cmd->sleep_interval[4]));
2216
2217 return rc;
2218 }
2219
2220 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2221 {
2222 u32 final_mode = mode;
2223 int rc;
2224 struct iwl_powertable_cmd cmd;
2225
2226 /* If on battery, set to 3,
2227 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2228 * else user level */
2229 switch (mode) {
2230 case IWL_POWER_BATTERY:
2231 final_mode = IWL_POWER_INDEX_3;
2232 break;
2233 case IWL_POWER_AC:
2234 final_mode = IWL_POWER_MODE_CAM;
2235 break;
2236 default:
2237 final_mode = mode;
2238 break;
2239 }
2240
2241 cmd.keep_alive_beacons = 0;
2242
2243 iwl_update_power_cmd(priv, &cmd, final_mode);
2244
2245 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2246
2247 if (final_mode == IWL_POWER_MODE_CAM)
2248 clear_bit(STATUS_POWER_PMI, &priv->status);
2249 else
2250 set_bit(STATUS_POWER_PMI, &priv->status);
2251
2252 return rc;
2253 }
2254
2255 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2256 {
2257 /* Filter incoming packets to determine if they are targeted toward
2258 * this network, discarding packets coming from ourselves */
2259 switch (priv->iw_mode) {
2260 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2261 /* packets from our adapter are dropped (echo) */
2262 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2263 return 0;
2264 /* {broad,multi}cast packets to our IBSS go through */
2265 if (is_multicast_ether_addr(header->addr1))
2266 return !compare_ether_addr(header->addr3, priv->bssid);
2267 /* packets to our adapter go through */
2268 return !compare_ether_addr(header->addr1, priv->mac_addr);
2269 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2270 /* packets from our adapter are dropped (echo) */
2271 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2272 return 0;
2273 /* {broad,multi}cast packets to our BSS go through */
2274 if (is_multicast_ether_addr(header->addr1))
2275 return !compare_ether_addr(header->addr2, priv->bssid);
2276 /* packets to our adapter go through */
2277 return !compare_ether_addr(header->addr1, priv->mac_addr);
2278 }
2279
2280 return 1;
2281 }
2282
2283 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2284
2285 const char *iwl_get_tx_fail_reason(u32 status)
2286 {
2287 switch (status & TX_STATUS_MSK) {
2288 case TX_STATUS_SUCCESS:
2289 return "SUCCESS";
2290 TX_STATUS_ENTRY(SHORT_LIMIT);
2291 TX_STATUS_ENTRY(LONG_LIMIT);
2292 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2293 TX_STATUS_ENTRY(MGMNT_ABORT);
2294 TX_STATUS_ENTRY(NEXT_FRAG);
2295 TX_STATUS_ENTRY(LIFE_EXPIRE);
2296 TX_STATUS_ENTRY(DEST_PS);
2297 TX_STATUS_ENTRY(ABORTED);
2298 TX_STATUS_ENTRY(BT_RETRY);
2299 TX_STATUS_ENTRY(STA_INVALID);
2300 TX_STATUS_ENTRY(FRAG_DROPPED);
2301 TX_STATUS_ENTRY(TID_DISABLE);
2302 TX_STATUS_ENTRY(FRAME_FLUSHED);
2303 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2304 TX_STATUS_ENTRY(TX_LOCKED);
2305 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2306 }
2307
2308 return "UNKNOWN";
2309 }
2310
2311 /**
2312 * iwl_scan_cancel - Cancel any currently executing HW scan
2313 *
2314 * NOTE: priv->mutex is not required before calling this function
2315 */
2316 static int iwl_scan_cancel(struct iwl_priv *priv)
2317 {
2318 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2319 clear_bit(STATUS_SCANNING, &priv->status);
2320 return 0;
2321 }
2322
2323 if (test_bit(STATUS_SCANNING, &priv->status)) {
2324 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2325 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2326 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2327 queue_work(priv->workqueue, &priv->abort_scan);
2328
2329 } else
2330 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2331
2332 return test_bit(STATUS_SCANNING, &priv->status);
2333 }
2334
2335 return 0;
2336 }
2337
2338 /**
2339 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2340 * @ms: amount of time to wait (in milliseconds) for scan to abort
2341 *
2342 * NOTE: priv->mutex must be held before calling this function
2343 */
2344 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2345 {
2346 unsigned long now = jiffies;
2347 int ret;
2348
2349 ret = iwl_scan_cancel(priv);
2350 if (ret && ms) {
2351 mutex_unlock(&priv->mutex);
2352 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2353 test_bit(STATUS_SCANNING, &priv->status))
2354 msleep(1);
2355 mutex_lock(&priv->mutex);
2356
2357 return test_bit(STATUS_SCANNING, &priv->status);
2358 }
2359
2360 return ret;
2361 }
2362
2363 static void iwl_sequence_reset(struct iwl_priv *priv)
2364 {
2365 /* Reset ieee stats */
2366
2367 /* We don't reset the net_device_stats (ieee->stats) on
2368 * re-association */
2369
2370 priv->last_seq_num = -1;
2371 priv->last_frag_num = -1;
2372 priv->last_packet_time = 0;
2373
2374 iwl_scan_cancel(priv);
2375 }
2376
2377 #define MAX_UCODE_BEACON_INTERVAL 4096
2378 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2379
2380 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2381 {
2382 u16 new_val = 0;
2383 u16 beacon_factor = 0;
2384
2385 beacon_factor =
2386 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2387 / MAX_UCODE_BEACON_INTERVAL;
2388 new_val = beacon_val / beacon_factor;
2389
2390 return cpu_to_le16(new_val);
2391 }
2392
2393 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2394 {
2395 u64 interval_tm_unit;
2396 u64 tsf, result;
2397 unsigned long flags;
2398 struct ieee80211_conf *conf = NULL;
2399 u16 beacon_int = 0;
2400
2401 conf = ieee80211_get_hw_conf(priv->hw);
2402
2403 spin_lock_irqsave(&priv->lock, flags);
2404 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2405 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2406
2407 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2408
2409 tsf = priv->timestamp1;
2410 tsf = ((tsf << 32) | priv->timestamp0);
2411
2412 beacon_int = priv->beacon_int;
2413 spin_unlock_irqrestore(&priv->lock, flags);
2414
2415 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2416 if (beacon_int == 0) {
2417 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2418 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2419 } else {
2420 priv->rxon_timing.beacon_interval =
2421 cpu_to_le16(beacon_int);
2422 priv->rxon_timing.beacon_interval =
2423 iwl_adjust_beacon_interval(
2424 le16_to_cpu(priv->rxon_timing.beacon_interval));
2425 }
2426
2427 priv->rxon_timing.atim_window = 0;
2428 } else {
2429 priv->rxon_timing.beacon_interval =
2430 iwl_adjust_beacon_interval(conf->beacon_int);
2431 /* TODO: we need to get atim_window from upper stack
2432 * for now we set to 0 */
2433 priv->rxon_timing.atim_window = 0;
2434 }
2435
2436 interval_tm_unit =
2437 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2438 result = do_div(tsf, interval_tm_unit);
2439 priv->rxon_timing.beacon_init_val =
2440 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2441
2442 IWL_DEBUG_ASSOC
2443 ("beacon interval %d beacon timer %d beacon tim %d\n",
2444 le16_to_cpu(priv->rxon_timing.beacon_interval),
2445 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2446 le16_to_cpu(priv->rxon_timing.atim_window));
2447 }
2448
2449 static int iwl_scan_initiate(struct iwl_priv *priv)
2450 {
2451 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2452 IWL_ERROR("APs don't scan.\n");
2453 return 0;
2454 }
2455
2456 if (!iwl_is_ready_rf(priv)) {
2457 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2458 return -EIO;
2459 }
2460
2461 if (test_bit(STATUS_SCANNING, &priv->status)) {
2462 IWL_DEBUG_SCAN("Scan already in progress.\n");
2463 return -EAGAIN;
2464 }
2465
2466 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2467 IWL_DEBUG_SCAN("Scan request while abort pending. "
2468 "Queuing.\n");
2469 return -EAGAIN;
2470 }
2471
2472 IWL_DEBUG_INFO("Starting scan...\n");
2473 priv->scan_bands = 2;
2474 set_bit(STATUS_SCANNING, &priv->status);
2475 priv->scan_start = jiffies;
2476 priv->scan_pass_start = priv->scan_start;
2477
2478 queue_work(priv->workqueue, &priv->request_scan);
2479
2480 return 0;
2481 }
2482
2483 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2484 {
2485 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2486
2487 if (hw_decrypt)
2488 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2489 else
2490 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2491
2492 return 0;
2493 }
2494
2495 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2496 {
2497 if (phymode == MODE_IEEE80211A) {
2498 priv->staging_rxon.flags &=
2499 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2500 | RXON_FLG_CCK_MSK);
2501 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2502 } else {
2503 /* Copied from iwl_bg_post_associate() */
2504 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2505 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2506 else
2507 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2508
2509 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2510 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2511
2512 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2513 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2514 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2515 }
2516 }
2517
2518 /*
2519 * initilize rxon structure with default values fromm eeprom
2520 */
2521 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2522 {
2523 const struct iwl_channel_info *ch_info;
2524
2525 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2526
2527 switch (priv->iw_mode) {
2528 case IEEE80211_IF_TYPE_AP:
2529 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2530 break;
2531
2532 case IEEE80211_IF_TYPE_STA:
2533 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2534 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2535 break;
2536
2537 case IEEE80211_IF_TYPE_IBSS:
2538 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2539 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2540 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2541 RXON_FILTER_ACCEPT_GRP_MSK;
2542 break;
2543
2544 case IEEE80211_IF_TYPE_MNTR:
2545 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2546 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2547 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2548 break;
2549 }
2550
2551 #if 0
2552 /* TODO: Figure out when short_preamble would be set and cache from
2553 * that */
2554 if (!hw_to_local(priv->hw)->short_preamble)
2555 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2556 else
2557 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2558 #endif
2559
2560 ch_info = iwl_get_channel_info(priv, priv->phymode,
2561 le16_to_cpu(priv->staging_rxon.channel));
2562
2563 if (!ch_info)
2564 ch_info = &priv->channel_info[0];
2565
2566 /*
2567 * in some case A channels are all non IBSS
2568 * in this case force B/G channel
2569 */
2570 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2571 !(is_channel_ibss(ch_info)))
2572 ch_info = &priv->channel_info[0];
2573
2574 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2575 if (is_channel_a_band(ch_info))
2576 priv->phymode = MODE_IEEE80211A;
2577 else
2578 priv->phymode = MODE_IEEE80211G;
2579
2580 iwl_set_flags_for_phymode(priv, priv->phymode);
2581
2582 priv->staging_rxon.ofdm_basic_rates =
2583 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2584 priv->staging_rxon.cck_basic_rates =
2585 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2586
2587 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2588 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2589 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2590 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2591 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2592 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2593 iwl4965_set_rxon_chain(priv);
2594 }
2595
2596 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2597 {
2598 if (!iwl_is_ready_rf(priv))
2599 return -EAGAIN;
2600
2601 if (mode == IEEE80211_IF_TYPE_IBSS) {
2602 const struct iwl_channel_info *ch_info;
2603
2604 ch_info = iwl_get_channel_info(priv,
2605 priv->phymode,
2606 le16_to_cpu(priv->staging_rxon.channel));
2607
2608 if (!ch_info || !is_channel_ibss(ch_info)) {
2609 IWL_ERROR("channel %d not IBSS channel\n",
2610 le16_to_cpu(priv->staging_rxon.channel));
2611 return -EINVAL;
2612 }
2613 }
2614
2615 cancel_delayed_work(&priv->scan_check);
2616 if (iwl_scan_cancel_timeout(priv, 100)) {
2617 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2618 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2619 return -EAGAIN;
2620 }
2621
2622 priv->iw_mode = mode;
2623
2624 iwl_connection_init_rx_config(priv);
2625 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2626
2627 iwl_clear_stations_table(priv);
2628
2629 iwl_commit_rxon(priv);
2630
2631 return 0;
2632 }
2633
2634 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2635 struct ieee80211_tx_control *ctl,
2636 struct iwl_cmd *cmd,
2637 struct sk_buff *skb_frag,
2638 int last_frag)
2639 {
2640 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2641
2642 switch (keyinfo->alg) {
2643 case ALG_CCMP:
2644 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2645 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2646 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2647 break;
2648
2649 case ALG_TKIP:
2650 #if 0
2651 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2652
2653 if (last_frag)
2654 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2655 8);
2656 else
2657 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2658 #endif
2659 break;
2660
2661 case ALG_WEP:
2662 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2663 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2664
2665 if (keyinfo->keylen == 13)
2666 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2667
2668 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2669
2670 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2671 "with key %d\n", ctl->key_idx);
2672 break;
2673
2674 default:
2675 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2676 break;
2677 }
2678 }
2679
2680 /*
2681 * handle build REPLY_TX command notification.
2682 */
2683 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2684 struct iwl_cmd *cmd,
2685 struct ieee80211_tx_control *ctrl,
2686 struct ieee80211_hdr *hdr,
2687 int is_unicast, u8 std_id)
2688 {
2689 __le16 *qc;
2690 u16 fc = le16_to_cpu(hdr->frame_control);
2691 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2692
2693 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2694 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2695 tx_flags |= TX_CMD_FLG_ACK_MSK;
2696 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2697 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2698 if (ieee80211_is_probe_response(fc) &&
2699 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2700 tx_flags |= TX_CMD_FLG_TSF_MSK;
2701 } else {
2702 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2703 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2704 }
2705
2706 cmd->cmd.tx.sta_id = std_id;
2707 if (ieee80211_get_morefrag(hdr))
2708 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2709
2710 qc = ieee80211_get_qos_ctrl(hdr);
2711 if (qc) {
2712 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2713 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2714 } else
2715 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2716
2717 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2718 tx_flags |= TX_CMD_FLG_RTS_MSK;
2719 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2720 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2721 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2722 tx_flags |= TX_CMD_FLG_CTS_MSK;
2723 }
2724
2725 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2726 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2727
2728 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2729 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2730 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2731 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2732 cmd->cmd.tx.timeout.pm_frame_timeout =
2733 cpu_to_le16(3);
2734 else
2735 cmd->cmd.tx.timeout.pm_frame_timeout =
2736 cpu_to_le16(2);
2737 } else
2738 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2739
2740 cmd->cmd.tx.driver_txop = 0;
2741 cmd->cmd.tx.tx_flags = tx_flags;
2742 cmd->cmd.tx.next_frame_len = 0;
2743 }
2744
2745 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2746 {
2747 int sta_id;
2748 u16 fc = le16_to_cpu(hdr->frame_control);
2749 DECLARE_MAC_BUF(mac);
2750
2751 /* If this frame is broadcast or not data then use the broadcast
2752 * station id */
2753 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2754 is_multicast_ether_addr(hdr->addr1))
2755 return priv->hw_setting.bcast_sta_id;
2756
2757 switch (priv->iw_mode) {
2758
2759 /* If this frame is part of a BSS network (we're a station), then
2760 * we use the AP's station id */
2761 case IEEE80211_IF_TYPE_STA:
2762 return IWL_AP_ID;
2763
2764 /* If we are an AP, then find the station, or use BCAST */
2765 case IEEE80211_IF_TYPE_AP:
2766 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2767 if (sta_id != IWL_INVALID_STATION)
2768 return sta_id;
2769 return priv->hw_setting.bcast_sta_id;
2770
2771 /* If this frame is part of a IBSS network, then we use the
2772 * target specific station id */
2773 case IEEE80211_IF_TYPE_IBSS:
2774 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2775 if (sta_id != IWL_INVALID_STATION)
2776 return sta_id;
2777
2778 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2779
2780 if (sta_id != IWL_INVALID_STATION)
2781 return sta_id;
2782
2783 IWL_DEBUG_DROP("Station %s not in station map. "
2784 "Defaulting to broadcast...\n",
2785 print_mac(mac, hdr->addr1));
2786 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2787 return priv->hw_setting.bcast_sta_id;
2788
2789 default:
2790 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2791 return priv->hw_setting.bcast_sta_id;
2792 }
2793 }
2794
2795 /*
2796 * start REPLY_TX command process
2797 */
2798 static int iwl_tx_skb(struct iwl_priv *priv,
2799 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2800 {
2801 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2802 struct iwl_tfd_frame *tfd;
2803 u32 *control_flags;
2804 int txq_id = ctl->queue;
2805 struct iwl_tx_queue *txq = NULL;
2806 struct iwl_queue *q = NULL;
2807 dma_addr_t phys_addr;
2808 dma_addr_t txcmd_phys;
2809 struct iwl_cmd *out_cmd = NULL;
2810 u16 len, idx, len_org;
2811 u8 id, hdr_len, unicast;
2812 u8 sta_id;
2813 u16 seq_number = 0;
2814 u16 fc;
2815 __le16 *qc;
2816 u8 wait_write_ptr = 0;
2817 unsigned long flags;
2818 int rc;
2819
2820 spin_lock_irqsave(&priv->lock, flags);
2821 if (iwl_is_rfkill(priv)) {
2822 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2823 goto drop_unlock;
2824 }
2825
2826 if (!priv->interface_id) {
2827 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2828 goto drop_unlock;
2829 }
2830
2831 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2832 IWL_ERROR("ERROR: No TX rate available.\n");
2833 goto drop_unlock;
2834 }
2835
2836 unicast = !is_multicast_ether_addr(hdr->addr1);
2837 id = 0;
2838
2839 fc = le16_to_cpu(hdr->frame_control);
2840
2841 #ifdef CONFIG_IWLWIFI_DEBUG
2842 if (ieee80211_is_auth(fc))
2843 IWL_DEBUG_TX("Sending AUTH frame\n");
2844 else if (ieee80211_is_assoc_request(fc))
2845 IWL_DEBUG_TX("Sending ASSOC frame\n");
2846 else if (ieee80211_is_reassoc_request(fc))
2847 IWL_DEBUG_TX("Sending REASSOC frame\n");
2848 #endif
2849
2850 if (!iwl_is_associated(priv) &&
2851 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2852 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2853 goto drop_unlock;
2854 }
2855
2856 spin_unlock_irqrestore(&priv->lock, flags);
2857
2858 hdr_len = ieee80211_get_hdrlen(fc);
2859 sta_id = iwl_get_sta_id(priv, hdr);
2860 if (sta_id == IWL_INVALID_STATION) {
2861 DECLARE_MAC_BUF(mac);
2862
2863 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2864 print_mac(mac, hdr->addr1));
2865 goto drop;
2866 }
2867
2868 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2869
2870 qc = ieee80211_get_qos_ctrl(hdr);
2871 if (qc) {
2872 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2873 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2874 IEEE80211_SCTL_SEQ;
2875 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2876 (hdr->seq_ctrl &
2877 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2878 seq_number += 0x10;
2879 #ifdef CONFIG_IWLWIFI_HT
2880 #ifdef CONFIG_IWLWIFI_HT_AGG
2881 /* aggregation is on for this <sta,tid> */
2882 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2883 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2884 #endif /* CONFIG_IWLWIFI_HT_AGG */
2885 #endif /* CONFIG_IWLWIFI_HT */
2886 }
2887 txq = &priv->txq[txq_id];
2888 q = &txq->q;
2889
2890 spin_lock_irqsave(&priv->lock, flags);
2891
2892 tfd = &txq->bd[q->first_empty];
2893 memset(tfd, 0, sizeof(*tfd));
2894 control_flags = (u32 *) tfd;
2895 idx = get_cmd_index(q, q->first_empty, 0);
2896
2897 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2898 txq->txb[q->first_empty].skb[0] = skb;
2899 memcpy(&(txq->txb[q->first_empty].status.control),
2900 ctl, sizeof(struct ieee80211_tx_control));
2901 out_cmd = &txq->cmd[idx];
2902 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2903 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2904 out_cmd->hdr.cmd = REPLY_TX;
2905 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2906 INDEX_TO_SEQ(q->first_empty)));
2907 /* copy frags header */
2908 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2909
2910 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2911 len = priv->hw_setting.tx_cmd_len +
2912 sizeof(struct iwl_cmd_header) + hdr_len;
2913
2914 len_org = len;
2915 len = (len + 3) & ~3;
2916
2917 if (len_org != len)
2918 len_org = 1;
2919 else
2920 len_org = 0;
2921
2922 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2923 offsetof(struct iwl_cmd, hdr);
2924
2925 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2926
2927 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2928 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2929
2930 /* 802.11 null functions have no payload... */
2931 len = skb->len - hdr_len;
2932 if (len) {
2933 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2934 len, PCI_DMA_TODEVICE);
2935 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2936 }
2937
2938 if (len_org)
2939 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2940
2941 len = (u16)skb->len;
2942 out_cmd->cmd.tx.len = cpu_to_le16(len);
2943
2944 /* TODO need this for burst mode later on */
2945 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2946
2947 /* set is_hcca to 0; it probably will never be implemented */
2948 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2949
2950 iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2951 hdr, hdr_len, ctl, NULL);
2952
2953 if (!ieee80211_get_morefrag(hdr)) {
2954 txq->need_update = 1;
2955 if (qc) {
2956 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2957 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2958 }
2959 } else {
2960 wait_write_ptr = 1;
2961 txq->need_update = 0;
2962 }
2963
2964 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2965 sizeof(out_cmd->cmd.tx));
2966
2967 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2968 ieee80211_get_hdrlen(fc));
2969
2970 iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2971
2972 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2973 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2974 spin_unlock_irqrestore(&priv->lock, flags);
2975
2976 if (rc)
2977 return rc;
2978
2979 if ((iwl_queue_space(q) < q->high_mark)
2980 && priv->mac80211_registered) {
2981 if (wait_write_ptr) {
2982 spin_lock_irqsave(&priv->lock, flags);
2983 txq->need_update = 1;
2984 iwl_tx_queue_update_write_ptr(priv, txq);
2985 spin_unlock_irqrestore(&priv->lock, flags);
2986 }
2987
2988 ieee80211_stop_queue(priv->hw, ctl->queue);
2989 }
2990
2991 return 0;
2992
2993 drop_unlock:
2994 spin_unlock_irqrestore(&priv->lock, flags);
2995 drop:
2996 return -1;
2997 }
2998
2999 static void iwl_set_rate(struct iwl_priv *priv)
3000 {
3001 const struct ieee80211_hw_mode *hw = NULL;
3002 struct ieee80211_rate *rate;
3003 int i;
3004
3005 hw = iwl_get_hw_mode(priv, priv->phymode);
3006 if (!hw) {
3007 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3008 return;
3009 }
3010
3011 priv->active_rate = 0;
3012 priv->active_rate_basic = 0;
3013
3014 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3015 hw->mode == MODE_IEEE80211A ?
3016 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3017
3018 for (i = 0; i < hw->num_rates; i++) {
3019 rate = &(hw->rates[i]);
3020 if ((rate->val < IWL_RATE_COUNT) &&
3021 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3022 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3023 rate->val, iwl_rates[rate->val].plcp,
3024 (rate->flags & IEEE80211_RATE_BASIC) ?
3025 "*" : "");
3026 priv->active_rate |= (1 << rate->val);
3027 if (rate->flags & IEEE80211_RATE_BASIC)
3028 priv->active_rate_basic |= (1 << rate->val);
3029 } else
3030 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3031 rate->val, iwl_rates[rate->val].plcp);
3032 }
3033
3034 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3035 priv->active_rate, priv->active_rate_basic);
3036
3037 /*
3038 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3039 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3040 * OFDM
3041 */
3042 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3043 priv->staging_rxon.cck_basic_rates =
3044 ((priv->active_rate_basic &
3045 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3046 else
3047 priv->staging_rxon.cck_basic_rates =
3048 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3049
3050 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3051 priv->staging_rxon.ofdm_basic_rates =
3052 ((priv->active_rate_basic &
3053 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3054 IWL_FIRST_OFDM_RATE) & 0xFF;
3055 else
3056 priv->staging_rxon.ofdm_basic_rates =
3057 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3058 }
3059
3060 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3061 {
3062 unsigned long flags;
3063
3064 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3065 return;
3066
3067 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3068 disable_radio ? "OFF" : "ON");
3069
3070 if (disable_radio) {
3071 iwl_scan_cancel(priv);
3072 /* FIXME: This is a workaround for AP */
3073 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3074 spin_lock_irqsave(&priv->lock, flags);
3075 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3076 CSR_UCODE_SW_BIT_RFKILL);
3077 spin_unlock_irqrestore(&priv->lock, flags);
3078 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3079 set_bit(STATUS_RF_KILL_SW, &priv->status);
3080 }
3081 return;
3082 }
3083
3084 spin_lock_irqsave(&priv->lock, flags);
3085 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3086
3087 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3088 spin_unlock_irqrestore(&priv->lock, flags);
3089
3090 /* wake up ucode */
3091 msleep(10);
3092
3093 spin_lock_irqsave(&priv->lock, flags);
3094 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3095 if (!iwl_grab_restricted_access(priv))
3096 iwl_release_restricted_access(priv);
3097 spin_unlock_irqrestore(&priv->lock, flags);
3098
3099 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3100 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3101 "disabled by HW switch\n");
3102 return;
3103 }
3104
3105 queue_work(priv->workqueue, &priv->restart);
3106 return;
3107 }
3108
3109 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3110 u32 decrypt_res, struct ieee80211_rx_status *stats)
3111 {
3112 u16 fc =
3113 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3114
3115 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3116 return;
3117
3118 if (!(fc & IEEE80211_FCTL_PROTECTED))
3119 return;
3120
3121 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3122 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3123 case RX_RES_STATUS_SEC_TYPE_TKIP:
3124 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3125 RX_RES_STATUS_BAD_ICV_MIC)
3126 stats->flag |= RX_FLAG_MMIC_ERROR;
3127 case RX_RES_STATUS_SEC_TYPE_WEP:
3128 case RX_RES_STATUS_SEC_TYPE_CCMP:
3129 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3130 RX_RES_STATUS_DECRYPT_OK) {
3131 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3132 stats->flag |= RX_FLAG_DECRYPTED;
3133 }
3134 break;
3135
3136 default:
3137 break;
3138 }
3139 }
3140
3141 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3142 struct iwl_rx_mem_buffer *rxb,
3143 void *data, short len,
3144 struct ieee80211_rx_status *stats,
3145 u16 phy_flags)
3146 {
3147 struct iwl_rt_rx_hdr *iwl_rt;
3148
3149 /* First cache any information we need before we overwrite
3150 * the information provided in the skb from the hardware */
3151 s8 signal = stats->ssi;
3152 s8 noise = 0;
3153 int rate = stats->rate;
3154 u64 tsf = stats->mactime;
3155 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3156
3157 /* We received data from the HW, so stop the watchdog */
3158 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3159 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3160 return;
3161 }
3162
3163 /* copy the frame data to write after where the radiotap header goes */
3164 iwl_rt = (void *)rxb->skb->data;
3165 memmove(iwl_rt->payload, data, len);
3166
3167 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3168 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3169
3170 /* total header + data */
3171 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3172
3173 /* Set the size of the skb to the size of the frame */
3174 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3175
3176 /* Big bitfield of all the fields we provide in radiotap */
3177 iwl_rt->rt_hdr.it_present =
3178 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3179 (1 << IEEE80211_RADIOTAP_FLAGS) |
3180 (1 << IEEE80211_RADIOTAP_RATE) |
3181 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3182 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3183 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3184 (1 << IEEE80211_RADIOTAP_ANTENNA));
3185
3186 /* Zero the flags, we'll add to them as we go */
3187 iwl_rt->rt_flags = 0;
3188
3189 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3190
3191 /* Convert to dBm */
3192 iwl_rt->rt_dbmsignal = signal;
3193 iwl_rt->rt_dbmnoise = noise;
3194
3195 /* Convert the channel frequency and set the flags */
3196 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3197 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3198 iwl_rt->rt_chbitmask =
3199 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3200 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3201 iwl_rt->rt_chbitmask =
3202 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3203 else /* 802.11g */
3204 iwl_rt->rt_chbitmask =
3205 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3206
3207 rate = iwl_rate_index_from_plcp(rate);
3208 if (rate == -1)
3209 iwl_rt->rt_rate = 0;
3210 else
3211 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3212
3213 /* antenna number */
3214 iwl_rt->rt_antenna =
3215 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3216
3217 /* set the preamble flag if we have it */
3218 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3219 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3220
3221 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3222
3223 stats->flag |= RX_FLAG_RADIOTAP;
3224 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3225 rxb->skb = NULL;
3226 }
3227
3228
3229 #define IWL_PACKET_RETRY_TIME HZ
3230
3231 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3232 {
3233 u16 sc = le16_to_cpu(header->seq_ctrl);
3234 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3235 u16 frag = sc & IEEE80211_SCTL_FRAG;
3236 u16 *last_seq, *last_frag;
3237 unsigned long *last_time;
3238
3239 switch (priv->iw_mode) {
3240 case IEEE80211_IF_TYPE_IBSS:{
3241 struct list_head *p;
3242 struct iwl_ibss_seq *entry = NULL;
3243 u8 *mac = header->addr2;
3244 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3245
3246 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3247 entry =
3248 list_entry(p, struct iwl_ibss_seq, list);
3249 if (!compare_ether_addr(entry->mac, mac))
3250 break;
3251 }
3252 if (p == &priv->ibss_mac_hash[index]) {
3253 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3254 if (!entry) {
3255 IWL_ERROR
3256 ("Cannot malloc new mac entry\n");
3257 return 0;
3258 }
3259 memcpy(entry->mac, mac, ETH_ALEN);
3260 entry->seq_num = seq;
3261 entry->frag_num = frag;
3262 entry->packet_time = jiffies;
3263 list_add(&entry->list,
3264 &priv->ibss_mac_hash[index]);
3265 return 0;
3266 }
3267 last_seq = &entry->seq_num;
3268 last_frag = &entry->frag_num;
3269 last_time = &entry->packet_time;
3270 break;
3271 }
3272 case IEEE80211_IF_TYPE_STA:
3273 last_seq = &priv->last_seq_num;
3274 last_frag = &priv->last_frag_num;
3275 last_time = &priv->last_packet_time;
3276 break;
3277 default:
3278 return 0;
3279 }
3280 if ((*last_seq == seq) &&
3281 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3282 if (*last_frag == frag)
3283 goto drop;
3284 if (*last_frag + 1 != frag)
3285 /* out-of-order fragment */
3286 goto drop;
3287 } else
3288 *last_seq = seq;
3289
3290 *last_frag = frag;
3291 *last_time = jiffies;
3292 return 0;
3293
3294 drop:
3295 return 1;
3296 }
3297
3298 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3299
3300 #include "iwl-spectrum.h"
3301
3302 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3303 #define BEACON_TIME_MASK_HIGH 0xFF000000
3304 #define TIME_UNIT 1024
3305
3306 /*
3307 * extended beacon time format
3308 * time in usec will be changed into a 32-bit value in 8:24 format
3309 * the high 1 byte is the beacon counts
3310 * the lower 3 bytes is the time in usec within one beacon interval
3311 */
3312
3313 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3314 {
3315 u32 quot;
3316 u32 rem;
3317 u32 interval = beacon_interval * 1024;
3318
3319 if (!interval || !usec)
3320 return 0;
3321
3322 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3323 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3324
3325 return (quot << 24) + rem;
3326 }
3327
3328 /* base is usually what we get from ucode with each received frame,
3329 * the same as HW timer counter counting down
3330 */
3331
3332 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3333 {
3334 u32 base_low = base & BEACON_TIME_MASK_LOW;
3335 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3336 u32 interval = beacon_interval * TIME_UNIT;
3337 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3338 (addon & BEACON_TIME_MASK_HIGH);
3339
3340 if (base_low > addon_low)
3341 res += base_low - addon_low;
3342 else if (base_low < addon_low) {
3343 res += interval + base_low - addon_low;
3344 res += (1 << 24);
3345 } else
3346 res += (1 << 24);
3347
3348 return cpu_to_le32(res);
3349 }
3350
3351 static int iwl_get_measurement(struct iwl_priv *priv,
3352 struct ieee80211_measurement_params *params,
3353 u8 type)
3354 {
3355 struct iwl_spectrum_cmd spectrum;
3356 struct iwl_rx_packet *res;
3357 struct iwl_host_cmd cmd = {
3358 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3359 .data = (void *)&spectrum,
3360 .meta.flags = CMD_WANT_SKB,
3361 };
3362 u32 add_time = le64_to_cpu(params->start_time);
3363 int rc;
3364 int spectrum_resp_status;
3365 int duration = le16_to_cpu(params->duration);
3366
3367 if (iwl_is_associated(priv))
3368 add_time =
3369 iwl_usecs_to_beacons(
3370 le64_to_cpu(params->start_time) - priv->last_tsf,
3371 le16_to_cpu(priv->rxon_timing.beacon_interval));
3372
3373 memset(&spectrum, 0, sizeof(spectrum));
3374
3375 spectrum.channel_count = cpu_to_le16(1);
3376 spectrum.flags =
3377 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3378 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3379 cmd.len = sizeof(spectrum);
3380 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3381
3382 if (iwl_is_associated(priv))
3383 spectrum.start_time =
3384 iwl_add_beacon_time(priv->last_beacon_time,
3385 add_time,
3386 le16_to_cpu(priv->rxon_timing.beacon_interval));
3387 else
3388 spectrum.start_time = 0;
3389
3390 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3391 spectrum.channels[0].channel = params->channel;
3392 spectrum.channels[0].type = type;
3393 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3394 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3395 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3396
3397 rc = iwl_send_cmd_sync(priv, &cmd);
3398 if (rc)
3399 return rc;
3400
3401 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3402 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3403 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3404 rc = -EIO;
3405 }
3406
3407 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3408 switch (spectrum_resp_status) {
3409 case 0: /* Command will be handled */
3410 if (res->u.spectrum.id != 0xff) {
3411 IWL_DEBUG_INFO
3412 ("Replaced existing measurement: %d\n",
3413 res->u.spectrum.id);
3414 priv->measurement_status &= ~MEASUREMENT_READY;
3415 }
3416 priv->measurement_status |= MEASUREMENT_ACTIVE;
3417 rc = 0;
3418 break;
3419
3420 case 1: /* Command will not be handled */
3421 rc = -EAGAIN;
3422 break;
3423 }
3424
3425 dev_kfree_skb_any(cmd.meta.u.skb);
3426
3427 return rc;
3428 }
3429 #endif
3430
3431 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3432 struct iwl_tx_info *tx_sta)
3433 {
3434
3435 tx_sta->status.ack_signal = 0;
3436 tx_sta->status.excessive_retries = 0;
3437 tx_sta->status.queue_length = 0;
3438 tx_sta->status.queue_number = 0;
3439
3440 if (in_interrupt())
3441 ieee80211_tx_status_irqsafe(priv->hw,
3442 tx_sta->skb[0], &(tx_sta->status));
3443 else
3444 ieee80211_tx_status(priv->hw,
3445 tx_sta->skb[0], &(tx_sta->status));
3446
3447 tx_sta->skb[0] = NULL;
3448 }
3449
3450 /**
3451 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3452 *
3453 * When FW advances 'R' index, all entries between old and
3454 * new 'R' index need to be reclaimed. As result, some free space
3455 * forms. If there is enough free space (> low mark), wake Tx queue.
3456 */
3457 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3458 {
3459 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3460 struct iwl_queue *q = &txq->q;
3461 int nfreed = 0;
3462
3463 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3464 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3465 "is out of range [0-%d] %d %d.\n", txq_id,
3466 index, q->n_bd, q->first_empty, q->last_used);
3467 return 0;
3468 }
3469
3470 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3471 q->last_used != index;
3472 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3473 if (txq_id != IWL_CMD_QUEUE_NUM) {
3474 iwl_txstatus_to_ieee(priv,
3475 &(txq->txb[txq->q.last_used]));
3476 iwl_hw_txq_free_tfd(priv, txq);
3477 } else if (nfreed > 1) {
3478 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3479 q->first_empty, q->last_used);
3480 queue_work(priv->workqueue, &priv->restart);
3481 }
3482 nfreed++;
3483 }
3484
3485 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3486 (txq_id != IWL_CMD_QUEUE_NUM) &&
3487 priv->mac80211_registered)
3488 ieee80211_wake_queue(priv->hw, txq_id);
3489
3490
3491 return nfreed;
3492 }
3493
3494 static int iwl_is_tx_success(u32 status)
3495 {
3496 status &= TX_STATUS_MSK;
3497 return (status == TX_STATUS_SUCCESS)
3498 || (status == TX_STATUS_DIRECT_DONE);
3499 }
3500
3501 /******************************************************************************
3502 *
3503 * Generic RX handler implementations
3504 *
3505 ******************************************************************************/
3506 #ifdef CONFIG_IWLWIFI_HT
3507 #ifdef CONFIG_IWLWIFI_HT_AGG
3508
3509 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3510 struct ieee80211_hdr *hdr)
3511 {
3512 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3513 return IWL_AP_ID;
3514 else {
3515 u8 *da = ieee80211_get_DA(hdr);
3516 return iwl_hw_find_station(priv, da);
3517 }
3518 }
3519
3520 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3521 struct iwl_priv *priv, int txq_id, int idx)
3522 {
3523 if (priv->txq[txq_id].txb[idx].skb[0])
3524 return (struct ieee80211_hdr *)priv->txq[txq_id].
3525 txb[idx].skb[0]->data;
3526 return NULL;
3527 }
3528
3529 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3530 {
3531 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3532 tx_resp->frame_count);
3533 return le32_to_cpu(*scd_ssn) & MAX_SN;
3534
3535 }
3536 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3537 struct iwl_ht_agg *agg,
3538 struct iwl_tx_resp *tx_resp,
3539 u16 start_idx)
3540 {
3541 u32 status;
3542 __le32 *frame_status = &tx_resp->status;
3543 struct ieee80211_tx_status *tx_status = NULL;
3544 struct ieee80211_hdr *hdr = NULL;
3545 int i, sh;
3546 int txq_id, idx;
3547 u16 seq;
3548
3549 if (agg->wait_for_ba)
3550 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3551
3552 agg->frame_count = tx_resp->frame_count;
3553 agg->start_idx = start_idx;
3554 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3555 agg->bitmap0 = agg->bitmap1 = 0;
3556
3557 if (agg->frame_count == 1) {
3558 struct iwl_tx_queue *txq ;
3559 status = le32_to_cpu(frame_status[0]);
3560
3561 txq_id = agg->txq_id;
3562 txq = &priv->txq[txq_id];
3563 /* FIXME: code repetition */
3564 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3565 agg->frame_count, agg->start_idx);
3566
3567 tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
3568 tx_status->retry_count = tx_resp->failure_frame;
3569 tx_status->queue_number = status & 0xff;
3570 tx_status->queue_length = tx_resp->bt_kill_count;
3571 tx_status->queue_length |= tx_resp->failure_rts;
3572
3573 tx_status->flags = iwl_is_tx_success(status)?
3574 IEEE80211_TX_STATUS_ACK : 0;
3575 tx_status->control.tx_rate =
3576 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3577 /* FIXME: code repetition end */
3578
3579 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3580 status & 0xff, tx_resp->failure_frame);
3581 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3582 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3583
3584 agg->wait_for_ba = 0;
3585 } else {
3586 u64 bitmap = 0;
3587 int start = agg->start_idx;
3588
3589 for (i = 0; i < agg->frame_count; i++) {
3590 u16 sc;
3591 status = le32_to_cpu(frame_status[i]);
3592 seq = status >> 16;
3593 idx = SEQ_TO_INDEX(seq);
3594 txq_id = SEQ_TO_QUEUE(seq);
3595
3596 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3597 AGG_TX_STATE_ABORT_MSK))
3598 continue;
3599
3600 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3601 agg->frame_count, txq_id, idx);
3602
3603 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3604
3605 sc = le16_to_cpu(hdr->seq_ctrl);
3606 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3607 IWL_ERROR("BUG_ON idx doesn't match seq control"
3608 " idx=%d, seq_idx=%d, seq=%d\n",
3609 idx, SEQ_TO_SN(sc),
3610 hdr->seq_ctrl);
3611 return -1;
3612 }
3613
3614 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3615 i, idx, SEQ_TO_SN(sc));
3616
3617 sh = idx - start;
3618 if (sh > 64) {
3619 sh = (start - idx) + 0xff;
3620 bitmap = bitmap << sh;
3621 sh = 0;
3622 start = idx;
3623 } else if (sh < -64)
3624 sh = 0xff - (start - idx);
3625 else if (sh < 0) {
3626 sh = start - idx;
3627 start = idx;
3628 bitmap = bitmap << sh;
3629 sh = 0;
3630 }
3631 bitmap |= (1 << sh);
3632 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3633 start, (u32)(bitmap & 0xFFFFFFFF));
3634 }
3635
3636 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3637 agg->bitmap1 = bitmap >> 32;
3638 agg->start_idx = start;
3639 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3640 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3641 agg->frame_count, agg->start_idx,
3642 agg->bitmap0);
3643
3644 if (bitmap)
3645 agg->wait_for_ba = 1;
3646 }
3647 return 0;
3648 }
3649 #endif
3650 #endif
3651
3652 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3653 struct iwl_rx_mem_buffer *rxb)
3654 {
3655 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3656 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3657 int txq_id = SEQ_TO_QUEUE(sequence);
3658 int index = SEQ_TO_INDEX(sequence);
3659 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3660 struct ieee80211_tx_status *tx_status;
3661 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3662 u32 status = le32_to_cpu(tx_resp->status);
3663 #ifdef CONFIG_IWLWIFI_HT
3664 #ifdef CONFIG_IWLWIFI_HT_AGG
3665 int tid, sta_id;
3666 #endif
3667 #endif
3668
3669 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3670 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3671 "is out of range [0-%d] %d %d\n", txq_id,
3672 index, txq->q.n_bd, txq->q.first_empty,
3673 txq->q.last_used);
3674 return;
3675 }
3676
3677 #ifdef CONFIG_IWLWIFI_HT
3678 #ifdef CONFIG_IWLWIFI_HT_AGG
3679 if (txq->sched_retry) {
3680 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3681 struct ieee80211_hdr *hdr =
3682 iwl_tx_queue_get_hdr(priv, txq_id, index);
3683 struct iwl_ht_agg *agg = NULL;
3684 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3685
3686 if (qc == NULL) {
3687 IWL_ERROR("BUG_ON qc is null!!!!\n");
3688 return;
3689 }
3690
3691 tid = le16_to_cpu(*qc) & 0xf;
3692
3693 sta_id = iwl_get_ra_sta_id(priv, hdr);
3694 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3695 IWL_ERROR("Station not known for\n");
3696 return;
3697 }
3698
3699 agg = &priv->stations[sta_id].tid[tid].agg;
3700
3701 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3702
3703 if ((tx_resp->frame_count == 1) &&
3704 !iwl_is_tx_success(status)) {
3705 /* TODO: send BAR */
3706 }
3707
3708 if ((txq->q.last_used != (scd_ssn & 0xff))) {
3709 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3710 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3711 "%d index %d\n", scd_ssn , index);
3712 iwl_tx_queue_reclaim(priv, txq_id, index);
3713 }
3714 } else {
3715 #endif /* CONFIG_IWLWIFI_HT_AGG */
3716 #endif /* CONFIG_IWLWIFI_HT */
3717 tx_status = &(txq->txb[txq->q.last_used].status);
3718
3719 tx_status->retry_count = tx_resp->failure_frame;
3720 tx_status->queue_number = status;
3721 tx_status->queue_length = tx_resp->bt_kill_count;
3722 tx_status->queue_length |= tx_resp->failure_rts;
3723
3724 tx_status->flags =
3725 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3726
3727 tx_status->control.tx_rate =
3728 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3729
3730 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3731 "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3732 status, le32_to_cpu(tx_resp->rate_n_flags),
3733 tx_resp->failure_frame);
3734
3735 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3736 if (index != -1)
3737 iwl_tx_queue_reclaim(priv, txq_id, index);
3738 #ifdef CONFIG_IWLWIFI_HT
3739 #ifdef CONFIG_IWLWIFI_HT_AGG
3740 }
3741 #endif /* CONFIG_IWLWIFI_HT_AGG */
3742 #endif /* CONFIG_IWLWIFI_HT */
3743
3744 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3745 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3746 }
3747
3748
3749 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3750 struct iwl_rx_mem_buffer *rxb)
3751 {
3752 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3753 struct iwl_alive_resp *palive;
3754 struct delayed_work *pwork;
3755
3756 palive = &pkt->u.alive_frame;
3757
3758 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3759 "0x%01X 0x%01X\n",
3760 palive->is_valid, palive->ver_type,
3761 palive->ver_subtype);
3762
3763 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3764 IWL_DEBUG_INFO("Initialization Alive received.\n");
3765 memcpy(&priv->card_alive_init,
3766 &pkt->u.alive_frame,
3767 sizeof(struct iwl_init_alive_resp));
3768 pwork = &priv->init_alive_start;
3769 } else {
3770 IWL_DEBUG_INFO("Runtime Alive received.\n");
3771 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3772 sizeof(struct iwl_alive_resp));
3773 pwork = &priv->alive_start;
3774 }
3775
3776 /* We delay the ALIVE response by 5ms to
3777 * give the HW RF Kill time to activate... */
3778 if (palive->is_valid == UCODE_VALID_OK)
3779 queue_delayed_work(priv->workqueue, pwork,
3780 msecs_to_jiffies(5));
3781 else
3782 IWL_WARNING("uCode did not respond OK.\n");
3783 }
3784
3785 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3786 struct iwl_rx_mem_buffer *rxb)
3787 {
3788 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3789
3790 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3791 return;
3792 }
3793
3794 static void iwl_rx_reply_error(struct iwl_priv *priv,
3795 struct iwl_rx_mem_buffer *rxb)
3796 {
3797 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3798
3799 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3800 "seq 0x%04X ser 0x%08X\n",
3801 le32_to_cpu(pkt->u.err_resp.error_type),
3802 get_cmd_string(pkt->u.err_resp.cmd_id),
3803 pkt->u.err_resp.cmd_id,
3804 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3805 le32_to_cpu(pkt->u.err_resp.error_info));
3806 }
3807
3808 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3809
3810 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3811 {
3812 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3813 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3814 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3815 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3816 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3817 rxon->channel = csa->channel;
3818 priv->staging_rxon.channel = csa->channel;
3819 }
3820
3821 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3822 struct iwl_rx_mem_buffer *rxb)
3823 {
3824 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3825 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3826 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3827
3828 if (!report->state) {
3829 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3830 "Spectrum Measure Notification: Start\n");
3831 return;
3832 }
3833
3834 memcpy(&priv->measure_report, report, sizeof(*report));
3835 priv->measurement_status |= MEASUREMENT_READY;
3836 #endif
3837 }
3838
3839 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3840 struct iwl_rx_mem_buffer *rxb)
3841 {
3842 #ifdef CONFIG_IWLWIFI_DEBUG
3843 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3844 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3845 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3846 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3847 #endif
3848 }
3849
3850 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3851 struct iwl_rx_mem_buffer *rxb)
3852 {
3853 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3854 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3855 "notification for %s:\n",
3856 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3857 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3858 }
3859
3860 static void iwl_bg_beacon_update(struct work_struct *work)
3861 {
3862 struct iwl_priv *priv =
3863 container_of(work, struct iwl_priv, beacon_update);
3864 struct sk_buff *beacon;
3865
3866 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3867 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3868
3869 if (!beacon) {
3870 IWL_ERROR("update beacon failed\n");
3871 return;
3872 }
3873
3874 mutex_lock(&priv->mutex);
3875 /* new beacon skb is allocated every time; dispose previous.*/
3876 if (priv->ibss_beacon)
3877 dev_kfree_skb(priv->ibss_beacon);
3878
3879 priv->ibss_beacon = beacon;
3880 mutex_unlock(&priv->mutex);
3881
3882 iwl_send_beacon_cmd(priv);
3883 }
3884
3885 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3886 struct iwl_rx_mem_buffer *rxb)
3887 {
3888 #ifdef CONFIG_IWLWIFI_DEBUG
3889 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3890 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3891 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3892
3893 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3894 "tsf %d %d rate %d\n",
3895 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3896 beacon->beacon_notify_hdr.failure_frame,
3897 le32_to_cpu(beacon->ibss_mgr_status),
3898 le32_to_cpu(beacon->high_tsf),
3899 le32_to_cpu(beacon->low_tsf), rate);
3900 #endif
3901
3902 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3903 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3904 queue_work(priv->workqueue, &priv->beacon_update);
3905 }
3906
3907 /* Service response to REPLY_SCAN_CMD (0x80) */
3908 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3909 struct iwl_rx_mem_buffer *rxb)
3910 {
3911 #ifdef CONFIG_IWLWIFI_DEBUG
3912 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3913 struct iwl_scanreq_notification *notif =
3914 (struct iwl_scanreq_notification *)pkt->u.raw;
3915
3916 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3917 #endif
3918 }
3919
3920 /* Service SCAN_START_NOTIFICATION (0x82) */
3921 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3922 struct iwl_rx_mem_buffer *rxb)
3923 {
3924 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3925 struct iwl_scanstart_notification *notif =
3926 (struct iwl_scanstart_notification *)pkt->u.raw;
3927 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3928 IWL_DEBUG_SCAN("Scan start: "
3929 "%d [802.11%s] "
3930 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3931 notif->channel,
3932 notif->band ? "bg" : "a",
3933 notif->tsf_high,
3934 notif->tsf_low, notif->status, notif->beacon_timer);
3935 }
3936
3937 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3938 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3939 struct iwl_rx_mem_buffer *rxb)
3940 {
3941 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3942 struct iwl_scanresults_notification *notif =
3943 (struct iwl_scanresults_notification *)pkt->u.raw;
3944
3945 IWL_DEBUG_SCAN("Scan ch.res: "
3946 "%d [802.11%s] "
3947 "(TSF: 0x%08X:%08X) - %d "
3948 "elapsed=%lu usec (%dms since last)\n",
3949 notif->channel,
3950 notif->band ? "bg" : "a",
3951 le32_to_cpu(notif->tsf_high),
3952 le32_to_cpu(notif->tsf_low),
3953 le32_to_cpu(notif->statistics[0]),
3954 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3955 jiffies_to_msecs(elapsed_jiffies
3956 (priv->last_scan_jiffies, jiffies)));
3957
3958 priv->last_scan_jiffies = jiffies;
3959 }
3960
3961 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3962 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3963 struct iwl_rx_mem_buffer *rxb)
3964 {
3965 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3966 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3967
3968 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3969 scan_notif->scanned_channels,
3970 scan_notif->tsf_low,
3971 scan_notif->tsf_high, scan_notif->status);
3972
3973 /* The HW is no longer scanning */
3974 clear_bit(STATUS_SCAN_HW, &priv->status);
3975
3976 /* The scan completion notification came in, so kill that timer... */
3977 cancel_delayed_work(&priv->scan_check);
3978
3979 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3980 (priv->scan_bands == 2) ? "2.4" : "5.2",
3981 jiffies_to_msecs(elapsed_jiffies
3982 (priv->scan_pass_start, jiffies)));
3983
3984 /* Remove this scanned band from the list
3985 * of pending bands to scan */
3986 priv->scan_bands--;
3987
3988 /* If a request to abort was given, or the scan did not succeed
3989 * then we reset the scan state machine and terminate,
3990 * re-queuing another scan if one has been requested */
3991 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3992 IWL_DEBUG_INFO("Aborted scan completed.\n");
3993 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3994 } else {
3995 /* If there are more bands on this scan pass reschedule */
3996 if (priv->scan_bands > 0)
3997 goto reschedule;
3998 }
3999
4000 priv->last_scan_jiffies = jiffies;
4001 IWL_DEBUG_INFO("Setting scan to off\n");
4002
4003 clear_bit(STATUS_SCANNING, &priv->status);
4004
4005 IWL_DEBUG_INFO("Scan took %dms\n",
4006 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4007
4008 queue_work(priv->workqueue, &priv->scan_completed);
4009
4010 return;
4011
4012 reschedule:
4013 priv->scan_pass_start = jiffies;
4014 queue_work(priv->workqueue, &priv->request_scan);
4015 }
4016
4017 /* Handle notification from uCode that card's power state is changing
4018 * due to software, hardware, or critical temperature RFKILL */
4019 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4020 struct iwl_rx_mem_buffer *rxb)
4021 {
4022 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4023 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4024 unsigned long status = priv->status;
4025
4026 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4027 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4028 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4029
4030 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4031 RF_CARD_DISABLED)) {
4032
4033 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4034 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4035
4036 if (!iwl_grab_restricted_access(priv)) {
4037 iwl_write_restricted(
4038 priv, HBUS_TARG_MBX_C,
4039 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4040
4041 iwl_release_restricted_access(priv);
4042 }
4043
4044 if (!(flags & RXON_CARD_DISABLED)) {
4045 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4046 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4047 if (!iwl_grab_restricted_access(priv)) {
4048 iwl_write_restricted(
4049 priv, HBUS_TARG_MBX_C,
4050 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4051
4052 iwl_release_restricted_access(priv);
4053 }
4054 }
4055
4056 if (flags & RF_CARD_DISABLED) {
4057 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4058 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4059 iwl_read32(priv, CSR_UCODE_DRV_GP1);
4060 if (!iwl_grab_restricted_access(priv))
4061 iwl_release_restricted_access(priv);
4062 }
4063 }
4064
4065 if (flags & HW_CARD_DISABLED)
4066 set_bit(STATUS_RF_KILL_HW, &priv->status);
4067 else
4068 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4069
4070
4071 if (flags & SW_CARD_DISABLED)
4072 set_bit(STATUS_RF_KILL_SW, &priv->status);
4073 else
4074 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4075
4076 if (!(flags & RXON_CARD_DISABLED))
4077 iwl_scan_cancel(priv);
4078
4079 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4080 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4081 (test_bit(STATUS_RF_KILL_SW, &status) !=
4082 test_bit(STATUS_RF_KILL_SW, &priv->status)))
4083 queue_work(priv->workqueue, &priv->rf_kill);
4084 else
4085 wake_up_interruptible(&priv->wait_command_queue);
4086 }
4087
4088 /**
4089 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4090 *
4091 * Setup the RX handlers for each of the reply types sent from the uCode
4092 * to the host.
4093 *
4094 * This function chains into the hardware specific files for them to setup
4095 * any hardware specific handlers as well.
4096 */
4097 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4098 {
4099 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4100 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4101 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4102 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4103 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4104 iwl_rx_spectrum_measure_notif;
4105 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4106 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4107 iwl_rx_pm_debug_statistics_notif;
4108 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4109
4110 /* NOTE: iwl_rx_statistics is different based on whether
4111 * the build is for the 3945 or the 4965. See the
4112 * corresponding implementation in iwl-XXXX.c
4113 *
4114 * The same handler is used for both the REPLY to a
4115 * discrete statistics request from the host as well as
4116 * for the periodic statistics notification from the uCode
4117 */
4118 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4119 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4120
4121 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4122 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4123 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4124 iwl_rx_scan_results_notif;
4125 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4126 iwl_rx_scan_complete_notif;
4127 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4128 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4129
4130 /* Setup hardware specific Rx handlers */
4131 iwl_hw_rx_handler_setup(priv);
4132 }
4133
4134 /**
4135 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4136 * @rxb: Rx buffer to reclaim
4137 *
4138 * If an Rx buffer has an async callback associated with it the callback
4139 * will be executed. The attached skb (if present) will only be freed
4140 * if the callback returns 1
4141 */
4142 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4143 struct iwl_rx_mem_buffer *rxb)
4144 {
4145 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4146 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4147 int txq_id = SEQ_TO_QUEUE(sequence);
4148 int index = SEQ_TO_INDEX(sequence);
4149 int huge = sequence & SEQ_HUGE_FRAME;
4150 int cmd_index;
4151 struct iwl_cmd *cmd;
4152
4153 /* If a Tx command is being handled and it isn't in the actual
4154 * command queue then there a command routing bug has been introduced
4155 * in the queue management code. */
4156 if (txq_id != IWL_CMD_QUEUE_NUM)
4157 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4158 txq_id, pkt->hdr.cmd);
4159 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4160
4161 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4162 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4163
4164 /* Input error checking is done when commands are added to queue. */
4165 if (cmd->meta.flags & CMD_WANT_SKB) {
4166 cmd->meta.source->u.skb = rxb->skb;
4167 rxb->skb = NULL;
4168 } else if (cmd->meta.u.callback &&
4169 !cmd->meta.u.callback(priv, cmd, rxb->skb))
4170 rxb->skb = NULL;
4171
4172 iwl_tx_queue_reclaim(priv, txq_id, index);
4173
4174 if (!(cmd->meta.flags & CMD_ASYNC)) {
4175 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4176 wake_up_interruptible(&priv->wait_command_queue);
4177 }
4178 }
4179
4180 /************************** RX-FUNCTIONS ****************************/
4181 /*
4182 * Rx theory of operation
4183 *
4184 * The host allocates 32 DMA target addresses and passes the host address
4185 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4186 * 0 to 31
4187 *
4188 * Rx Queue Indexes
4189 * The host/firmware share two index registers for managing the Rx buffers.
4190 *
4191 * The READ index maps to the first position that the firmware may be writing
4192 * to -- the driver can read up to (but not including) this position and get
4193 * good data.
4194 * The READ index is managed by the firmware once the card is enabled.
4195 *
4196 * The WRITE index maps to the last position the driver has read from -- the
4197 * position preceding WRITE is the last slot the firmware can place a packet.
4198 *
4199 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4200 * WRITE = READ.
4201 *
4202 * During initialization the host sets up the READ queue position to the first
4203 * INDEX position, and WRITE to the last (READ - 1 wrapped)
4204 *
4205 * When the firmware places a packet in a buffer it will advance the READ index
4206 * and fire the RX interrupt. The driver can then query the READ index and
4207 * process as many packets as possible, moving the WRITE index forward as it
4208 * resets the Rx queue buffers with new memory.
4209 *
4210 * The management in the driver is as follows:
4211 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
4212 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4213 * to replensish the iwl->rxq->rx_free.
4214 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4215 * iwl->rxq is replenished and the READ INDEX is updated (updating the
4216 * 'processed' and 'read' driver indexes as well)
4217 * + A received packet is processed and handed to the kernel network stack,
4218 * detached from the iwl->rxq. The driver 'processed' index is updated.
4219 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4220 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4221 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
4222 * were enough free buffers and RX_STALLED is set it is cleared.
4223 *
4224 *
4225 * Driver sequence:
4226 *
4227 * iwl_rx_queue_alloc() Allocates rx_free
4228 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
4229 * iwl_rx_queue_restock
4230 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
4231 * queue, updates firmware pointers, and updates
4232 * the WRITE index. If insufficient rx_free buffers
4233 * are available, schedules iwl_rx_replenish
4234 *
4235 * -- enable interrupts --
4236 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
4237 * READ INDEX, detaching the SKB from the pool.
4238 * Moves the packet buffer from queue to rx_used.
4239 * Calls iwl_rx_queue_restock to refill any empty
4240 * slots.
4241 * ...
4242 *
4243 */
4244
4245 /**
4246 * iwl_rx_queue_space - Return number of free slots available in queue.
4247 */
4248 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4249 {
4250 int s = q->read - q->write;
4251 if (s <= 0)
4252 s += RX_QUEUE_SIZE;
4253 /* keep some buffer to not confuse full and empty queue */
4254 s -= 2;
4255 if (s < 0)
4256 s = 0;
4257 return s;
4258 }
4259
4260 /**
4261 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4262 *
4263 * NOTE: This function has 3945 and 4965 specific code sections
4264 * but is declared in base due to the majority of the
4265 * implementation being the same (only a numeric constant is
4266 * different)
4267 *
4268 */
4269 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4270 {
4271 u32 reg = 0;
4272 int rc = 0;
4273 unsigned long flags;
4274
4275 spin_lock_irqsave(&q->lock, flags);
4276
4277 if (q->need_update == 0)
4278 goto exit_unlock;
4279
4280 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4281 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4282
4283 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4284 iwl_set_bit(priv, CSR_GP_CNTRL,
4285 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4286 goto exit_unlock;
4287 }
4288
4289 rc = iwl_grab_restricted_access(priv);
4290 if (rc)
4291 goto exit_unlock;
4292
4293 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4294 q->write & ~0x7);
4295 iwl_release_restricted_access(priv);
4296 } else
4297 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4298
4299
4300 q->need_update = 0;
4301
4302 exit_unlock:
4303 spin_unlock_irqrestore(&q->lock, flags);
4304 return rc;
4305 }
4306
4307 /**
4308 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4309 *
4310 * NOTE: This function has 3945 and 4965 specific code paths in it.
4311 */
4312 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4313 dma_addr_t dma_addr)
4314 {
4315 return cpu_to_le32((u32)(dma_addr >> 8));
4316 }
4317
4318
4319 /**
4320 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4321 *
4322 * If there are slots in the RX queue that need to be restocked,
4323 * and we have free pre-allocated buffers, fill the ranks as much
4324 * as we can pulling from rx_free.
4325 *
4326 * This moves the 'write' index forward to catch up with 'processed', and
4327 * also updates the memory address in the firmware to reference the new
4328 * target buffer.
4329 */
4330 int iwl_rx_queue_restock(struct iwl_priv *priv)
4331 {
4332 struct iwl_rx_queue *rxq = &priv->rxq;
4333 struct list_head *element;
4334 struct iwl_rx_mem_buffer *rxb;
4335 unsigned long flags;
4336 int write, rc;
4337
4338 spin_lock_irqsave(&rxq->lock, flags);
4339 write = rxq->write & ~0x7;
4340 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4341 element = rxq->rx_free.next;
4342 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4343 list_del(element);
4344 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4345 rxq->queue[rxq->write] = rxb;
4346 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4347 rxq->free_count--;
4348 }
4349 spin_unlock_irqrestore(&rxq->lock, flags);
4350 /* If the pre-allocated buffer pool is dropping low, schedule to
4351 * refill it */
4352 if (rxq->free_count <= RX_LOW_WATERMARK)
4353 queue_work(priv->workqueue, &priv->rx_replenish);
4354
4355
4356 /* If we've added more space for the firmware to place data, tell it */
4357 if ((write != (rxq->write & ~0x7))
4358 || (abs(rxq->write - rxq->read) > 7)) {
4359 spin_lock_irqsave(&rxq->lock, flags);
4360 rxq->need_update = 1;
4361 spin_unlock_irqrestore(&rxq->lock, flags);
4362 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4363 if (rc)
4364 return rc;
4365 }
4366
4367 return 0;
4368 }
4369
4370 /**
4371 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4372 *
4373 * When moving to rx_free an SKB is allocated for the slot.
4374 *
4375 * Also restock the Rx queue via iwl_rx_queue_restock.
4376 * This is called as a scheduled work item (except for during intialization)
4377 */
4378 void iwl_rx_replenish(void *data)
4379 {
4380 struct iwl_priv *priv = data;
4381 struct iwl_rx_queue *rxq = &priv->rxq;
4382 struct list_head *element;
4383 struct iwl_rx_mem_buffer *rxb;
4384 unsigned long flags;
4385 spin_lock_irqsave(&rxq->lock, flags);
4386 while (!list_empty(&rxq->rx_used)) {
4387 element = rxq->rx_used.next;
4388 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4389 rxb->skb =
4390 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4391 if (!rxb->skb) {
4392 if (net_ratelimit())
4393 printk(KERN_CRIT DRV_NAME
4394 ": Can not allocate SKB buffers\n");
4395 /* We don't reschedule replenish work here -- we will
4396 * call the restock method and if it still needs
4397 * more buffers it will schedule replenish */
4398 break;
4399 }
4400 priv->alloc_rxb_skb++;
4401 list_del(element);
4402 rxb->dma_addr =
4403 pci_map_single(priv->pci_dev, rxb->skb->data,
4404 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4405 list_add_tail(&rxb->list, &rxq->rx_free);
4406 rxq->free_count++;
4407 }
4408 spin_unlock_irqrestore(&rxq->lock, flags);
4409
4410 spin_lock_irqsave(&priv->lock, flags);
4411 iwl_rx_queue_restock(priv);
4412 spin_unlock_irqrestore(&priv->lock, flags);
4413 }
4414
4415 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4416 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4417 * This free routine walks the list of POOL entries and if SKB is set to
4418 * non NULL it is unmapped and freed
4419 */
4420 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4421 {
4422 int i;
4423 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4424 if (rxq->pool[i].skb != NULL) {
4425 pci_unmap_single(priv->pci_dev,
4426 rxq->pool[i].dma_addr,
4427 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4428 dev_kfree_skb(rxq->pool[i].skb);
4429 }
4430 }
4431
4432 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4433 rxq->dma_addr);
4434 rxq->bd = NULL;
4435 }
4436
4437 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4438 {
4439 struct iwl_rx_queue *rxq = &priv->rxq;
4440 struct pci_dev *dev = priv->pci_dev;
4441 int i;
4442
4443 spin_lock_init(&rxq->lock);
4444 INIT_LIST_HEAD(&rxq->rx_free);
4445 INIT_LIST_HEAD(&rxq->rx_used);
4446 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4447 if (!rxq->bd)
4448 return -ENOMEM;
4449 /* Fill the rx_used queue with _all_ of the Rx buffers */
4450 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4451 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4452 /* Set us so that we have processed and used all buffers, but have
4453 * not restocked the Rx queue with fresh buffers */
4454 rxq->read = rxq->write = 0;
4455 rxq->free_count = 0;
4456 rxq->need_update = 0;
4457 return 0;
4458 }
4459
4460 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4461 {
4462 unsigned long flags;
4463 int i;
4464 spin_lock_irqsave(&rxq->lock, flags);
4465 INIT_LIST_HEAD(&rxq->rx_free);
4466 INIT_LIST_HEAD(&rxq->rx_used);
4467 /* Fill the rx_used queue with _all_ of the Rx buffers */
4468 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4469 /* In the reset function, these buffers may have been allocated
4470 * to an SKB, so we need to unmap and free potential storage */
4471 if (rxq->pool[i].skb != NULL) {
4472 pci_unmap_single(priv->pci_dev,
4473 rxq->pool[i].dma_addr,
4474 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4475 priv->alloc_rxb_skb--;
4476 dev_kfree_skb(rxq->pool[i].skb);
4477 rxq->pool[i].skb = NULL;
4478 }
4479 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4480 }
4481
4482 /* Set us so that we have processed and used all buffers, but have
4483 * not restocked the Rx queue with fresh buffers */
4484 rxq->read = rxq->write = 0;
4485 rxq->free_count = 0;
4486 spin_unlock_irqrestore(&rxq->lock, flags);
4487 }
4488
4489 /* Convert linear signal-to-noise ratio into dB */
4490 static u8 ratio2dB[100] = {
4491 /* 0 1 2 3 4 5 6 7 8 9 */
4492 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4493 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4494 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4495 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4496 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4497 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4498 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4499 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4500 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4501 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4502 };
4503
4504 /* Calculates a relative dB value from a ratio of linear
4505 * (i.e. not dB) signal levels.
4506 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4507 int iwl_calc_db_from_ratio(int sig_ratio)
4508 {
4509 /* 1000:1 or higher just report as 60 dB */
4510 if (sig_ratio >= 1000)
4511 return 60;
4512
4513 /* 100:1 or higher, divide by 10 and use table,
4514 * add 20 dB to make up for divide by 10 */
4515 if (sig_ratio >= 100)
4516 return (20 + (int)ratio2dB[sig_ratio/10]);
4517
4518 /* We shouldn't see this */
4519 if (sig_ratio < 1)
4520 return 0;
4521
4522 /* Use table for ratios 1:1 - 99:1 */
4523 return (int)ratio2dB[sig_ratio];
4524 }
4525
4526 #define PERFECT_RSSI (-20) /* dBm */
4527 #define WORST_RSSI (-95) /* dBm */
4528 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4529
4530 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4531 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4532 * about formulas used below. */
4533 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4534 {
4535 int sig_qual;
4536 int degradation = PERFECT_RSSI - rssi_dbm;
4537
4538 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4539 * as indicator; formula is (signal dbm - noise dbm).
4540 * SNR at or above 40 is a great signal (100%).
4541 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4542 * Weakest usable signal is usually 10 - 15 dB SNR. */
4543 if (noise_dbm) {
4544 if (rssi_dbm - noise_dbm >= 40)
4545 return 100;
4546 else if (rssi_dbm < noise_dbm)
4547 return 0;
4548 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4549
4550 /* Else use just the signal level.
4551 * This formula is a least squares fit of data points collected and
4552 * compared with a reference system that had a percentage (%) display
4553 * for signal quality. */
4554 } else
4555 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4556 (15 * RSSI_RANGE + 62 * degradation)) /
4557 (RSSI_RANGE * RSSI_RANGE);
4558
4559 if (sig_qual > 100)
4560 sig_qual = 100;
4561 else if (sig_qual < 1)
4562 sig_qual = 0;
4563
4564 return sig_qual;
4565 }
4566
4567 /**
4568 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4569 *
4570 * Uses the priv->rx_handlers callback function array to invoke
4571 * the appropriate handlers, including command responses,
4572 * frame-received notifications, and other notifications.
4573 */
4574 static void iwl_rx_handle(struct iwl_priv *priv)
4575 {
4576 struct iwl_rx_mem_buffer *rxb;
4577 struct iwl_rx_packet *pkt;
4578 struct iwl_rx_queue *rxq = &priv->rxq;
4579 u32 r, i;
4580 int reclaim;
4581 unsigned long flags;
4582
4583 r = iwl_hw_get_rx_read(priv);
4584 i = rxq->read;
4585
4586 /* Rx interrupt, but nothing sent from uCode */
4587 if (i == r)
4588 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4589
4590 while (i != r) {
4591 rxb = rxq->queue[i];
4592
4593 /* If an RXB doesn't have a queue slot associated with it
4594 * then a bug has been introduced in the queue refilling
4595 * routines -- catch it here */
4596 BUG_ON(rxb == NULL);
4597
4598 rxq->queue[i] = NULL;
4599
4600 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4601 IWL_RX_BUF_SIZE,
4602 PCI_DMA_FROMDEVICE);
4603 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4604
4605 /* Reclaim a command buffer only if this packet is a response
4606 * to a (driver-originated) command.
4607 * If the packet (e.g. Rx frame) originated from uCode,
4608 * there is no command buffer to reclaim.
4609 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4610 * but apparently a few don't get set; catch them here. */
4611 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4612 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4613 (pkt->hdr.cmd != REPLY_4965_RX) &&
4614 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4615 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4616 (pkt->hdr.cmd != REPLY_TX);
4617
4618 /* Based on type of command response or notification,
4619 * handle those that need handling via function in
4620 * rx_handlers table. See iwl_setup_rx_handlers() */
4621 if (priv->rx_handlers[pkt->hdr.cmd]) {
4622 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4623 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4624 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4625 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4626 } else {
4627 /* No handling needed */
4628 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4629 "r %d i %d No handler needed for %s, 0x%02x\n",
4630 r, i, get_cmd_string(pkt->hdr.cmd),
4631 pkt->hdr.cmd);
4632 }
4633
4634 if (reclaim) {
4635 /* Invoke any callbacks, transfer the skb to caller,
4636 * and fire off the (possibly) blocking iwl_send_cmd()
4637 * as we reclaim the driver command queue */
4638 if (rxb && rxb->skb)
4639 iwl_tx_cmd_complete(priv, rxb);
4640 else
4641 IWL_WARNING("Claim null rxb?\n");
4642 }
4643
4644 /* For now we just don't re-use anything. We can tweak this
4645 * later to try and re-use notification packets and SKBs that
4646 * fail to Rx correctly */
4647 if (rxb->skb != NULL) {
4648 priv->alloc_rxb_skb--;
4649 dev_kfree_skb_any(rxb->skb);
4650 rxb->skb = NULL;
4651 }
4652
4653 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4654 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4655 spin_lock_irqsave(&rxq->lock, flags);
4656 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4657 spin_unlock_irqrestore(&rxq->lock, flags);
4658 i = (i + 1) & RX_QUEUE_MASK;
4659 }
4660
4661 /* Backtrack one entry */
4662 priv->rxq.read = i;
4663 iwl_rx_queue_restock(priv);
4664 }
4665
4666 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4667 struct iwl_tx_queue *txq)
4668 {
4669 u32 reg = 0;
4670 int rc = 0;
4671 int txq_id = txq->q.id;
4672
4673 if (txq->need_update == 0)
4674 return rc;
4675
4676 /* if we're trying to save power */
4677 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4678 /* wake up nic if it's powered down ...
4679 * uCode will wake up, and interrupt us again, so next
4680 * time we'll skip this part. */
4681 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4682
4683 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4684 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4685 iwl_set_bit(priv, CSR_GP_CNTRL,
4686 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4687 return rc;
4688 }
4689
4690 /* restore this queue's parameters in nic hardware. */
4691 rc = iwl_grab_restricted_access(priv);
4692 if (rc)
4693 return rc;
4694 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4695 txq->q.first_empty | (txq_id << 8));
4696 iwl_release_restricted_access(priv);
4697
4698 /* else not in power-save mode, uCode will never sleep when we're
4699 * trying to tx (during RFKILL, we're not trying to tx). */
4700 } else
4701 iwl_write32(priv, HBUS_TARG_WRPTR,
4702 txq->q.first_empty | (txq_id << 8));
4703
4704 txq->need_update = 0;
4705
4706 return rc;
4707 }
4708
4709 #ifdef CONFIG_IWLWIFI_DEBUG
4710 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4711 {
4712 DECLARE_MAC_BUF(mac);
4713
4714 IWL_DEBUG_RADIO("RX CONFIG:\n");
4715 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4716 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4717 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4718 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4719 le32_to_cpu(rxon->filter_flags));
4720 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4721 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4722 rxon->ofdm_basic_rates);
4723 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4724 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4725 print_mac(mac, rxon->node_addr));
4726 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4727 print_mac(mac, rxon->bssid_addr));
4728 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4729 }
4730 #endif
4731
4732 static void iwl_enable_interrupts(struct iwl_priv *priv)
4733 {
4734 IWL_DEBUG_ISR("Enabling interrupts\n");
4735 set_bit(STATUS_INT_ENABLED, &priv->status);
4736 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4737 }
4738
4739 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4740 {
4741 clear_bit(STATUS_INT_ENABLED, &priv->status);
4742
4743 /* disable interrupts from uCode/NIC to host */
4744 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4745
4746 /* acknowledge/clear/reset any interrupts still pending
4747 * from uCode or flow handler (Rx/Tx DMA) */
4748 iwl_write32(priv, CSR_INT, 0xffffffff);
4749 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4750 IWL_DEBUG_ISR("Disabled interrupts\n");
4751 }
4752
4753 static const char *desc_lookup(int i)
4754 {
4755 switch (i) {
4756 case 1:
4757 return "FAIL";
4758 case 2:
4759 return "BAD_PARAM";
4760 case 3:
4761 return "BAD_CHECKSUM";
4762 case 4:
4763 return "NMI_INTERRUPT";
4764 case 5:
4765 return "SYSASSERT";
4766 case 6:
4767 return "FATAL_ERROR";
4768 }
4769
4770 return "UNKNOWN";
4771 }
4772
4773 #define ERROR_START_OFFSET (1 * sizeof(u32))
4774 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4775
4776 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4777 {
4778 u32 data2, line;
4779 u32 desc, time, count, base, data1;
4780 u32 blink1, blink2, ilink1, ilink2;
4781 int rc;
4782
4783 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4784
4785 if (!iwl_hw_valid_rtc_data_addr(base)) {
4786 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4787 return;
4788 }
4789
4790 rc = iwl_grab_restricted_access(priv);
4791 if (rc) {
4792 IWL_WARNING("Can not read from adapter at this time.\n");
4793 return;
4794 }
4795
4796 count = iwl_read_restricted_mem(priv, base);
4797
4798 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4799 IWL_ERROR("Start IWL Error Log Dump:\n");
4800 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4801 priv->status, priv->config, count);
4802 }
4803
4804 desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4805 blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4806 blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4807 ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4808 ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4809 data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4810 data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4811 line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4812 time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4813
4814 IWL_ERROR("Desc Time "
4815 "data1 data2 line\n");
4816 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4817 desc_lookup(desc), desc, time, data1, data2, line);
4818 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4819 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4820 ilink1, ilink2);
4821
4822 iwl_release_restricted_access(priv);
4823 }
4824
4825 #define EVENT_START_OFFSET (4 * sizeof(u32))
4826
4827 /**
4828 * iwl_print_event_log - Dump error event log to syslog
4829 *
4830 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4831 */
4832 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4833 u32 num_events, u32 mode)
4834 {
4835 u32 i;
4836 u32 base; /* SRAM byte address of event log header */
4837 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4838 u32 ptr; /* SRAM byte address of log data */
4839 u32 ev, time, data; /* event log data */
4840
4841 if (num_events == 0)
4842 return;
4843
4844 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4845
4846 if (mode == 0)
4847 event_size = 2 * sizeof(u32);
4848 else
4849 event_size = 3 * sizeof(u32);
4850
4851 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4852
4853 /* "time" is actually "data" for mode 0 (no timestamp).
4854 * place event id # at far right for easier visual parsing. */
4855 for (i = 0; i < num_events; i++) {
4856 ev = iwl_read_restricted_mem(priv, ptr);
4857 ptr += sizeof(u32);
4858 time = iwl_read_restricted_mem(priv, ptr);
4859 ptr += sizeof(u32);
4860 if (mode == 0)
4861 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4862 else {
4863 data = iwl_read_restricted_mem(priv, ptr);
4864 ptr += sizeof(u32);
4865 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4866 }
4867 }
4868 }
4869
4870 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4871 {
4872 int rc;
4873 u32 base; /* SRAM byte address of event log header */
4874 u32 capacity; /* event log capacity in # entries */
4875 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4876 u32 num_wraps; /* # times uCode wrapped to top of log */
4877 u32 next_entry; /* index of next entry to be written by uCode */
4878 u32 size; /* # entries that we'll print */
4879
4880 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4881 if (!iwl_hw_valid_rtc_data_addr(base)) {
4882 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4883 return;
4884 }
4885
4886 rc = iwl_grab_restricted_access(priv);
4887 if (rc) {
4888 IWL_WARNING("Can not read from adapter at this time.\n");
4889 return;
4890 }
4891
4892 /* event log header */
4893 capacity = iwl_read_restricted_mem(priv, base);
4894 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4895 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4896 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4897
4898 size = num_wraps ? capacity : next_entry;
4899
4900 /* bail out if nothing in log */
4901 if (size == 0) {
4902 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4903 iwl_release_restricted_access(priv);
4904 return;
4905 }
4906
4907 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4908 size, num_wraps);
4909
4910 /* if uCode has wrapped back to top of log, start at the oldest entry,
4911 * i.e the next one that uCode would fill. */
4912 if (num_wraps)
4913 iwl_print_event_log(priv, next_entry,
4914 capacity - next_entry, mode);
4915
4916 /* (then/else) start at top of log */
4917 iwl_print_event_log(priv, 0, next_entry, mode);
4918
4919 iwl_release_restricted_access(priv);
4920 }
4921
4922 /**
4923 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4924 */
4925 static void iwl_irq_handle_error(struct iwl_priv *priv)
4926 {
4927 /* Set the FW error flag -- cleared on iwl_down */
4928 set_bit(STATUS_FW_ERROR, &priv->status);
4929
4930 /* Cancel currently queued command. */
4931 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4932
4933 #ifdef CONFIG_IWLWIFI_DEBUG
4934 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4935 iwl_dump_nic_error_log(priv);
4936 iwl_dump_nic_event_log(priv);
4937 iwl_print_rx_config_cmd(&priv->staging_rxon);
4938 }
4939 #endif
4940
4941 wake_up_interruptible(&priv->wait_command_queue);
4942
4943 /* Keep the restart process from trying to send host
4944 * commands by clearing the INIT status bit */
4945 clear_bit(STATUS_READY, &priv->status);
4946
4947 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4948 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4949 "Restarting adapter due to uCode error.\n");
4950
4951 if (iwl_is_associated(priv)) {
4952 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4953 sizeof(priv->recovery_rxon));
4954 priv->error_recovering = 1;
4955 }
4956 queue_work(priv->workqueue, &priv->restart);
4957 }
4958 }
4959
4960 static void iwl_error_recovery(struct iwl_priv *priv)
4961 {
4962 unsigned long flags;
4963
4964 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4965 sizeof(priv->staging_rxon));
4966 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4967 iwl_commit_rxon(priv);
4968
4969 iwl_rxon_add_station(priv, priv->bssid, 1);
4970
4971 spin_lock_irqsave(&priv->lock, flags);
4972 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4973 priv->error_recovering = 0;
4974 spin_unlock_irqrestore(&priv->lock, flags);
4975 }
4976
4977 static void iwl_irq_tasklet(struct iwl_priv *priv)
4978 {
4979 u32 inta, handled = 0;
4980 u32 inta_fh;
4981 unsigned long flags;
4982 #ifdef CONFIG_IWLWIFI_DEBUG
4983 u32 inta_mask;
4984 #endif
4985
4986 spin_lock_irqsave(&priv->lock, flags);
4987
4988 /* Ack/clear/reset pending uCode interrupts.
4989 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4990 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4991 inta = iwl_read32(priv, CSR_INT);
4992 iwl_write32(priv, CSR_INT, inta);
4993
4994 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4995 * Any new interrupts that happen after this, either while we're
4996 * in this tasklet, or later, will show up in next ISR/tasklet. */
4997 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4998 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4999
5000 #ifdef CONFIG_IWLWIFI_DEBUG
5001 if (iwl_debug_level & IWL_DL_ISR) {
5002 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5003 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5004 inta, inta_mask, inta_fh);
5005 }
5006 #endif
5007
5008 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5009 * atomic, make sure that inta covers all the interrupts that
5010 * we've discovered, even if FH interrupt came in just after
5011 * reading CSR_INT. */
5012 if (inta_fh & CSR_FH_INT_RX_MASK)
5013 inta |= CSR_INT_BIT_FH_RX;
5014 if (inta_fh & CSR_FH_INT_TX_MASK)
5015 inta |= CSR_INT_BIT_FH_TX;
5016
5017 /* Now service all interrupt bits discovered above. */
5018 if (inta & CSR_INT_BIT_HW_ERR) {
5019 IWL_ERROR("Microcode HW error detected. Restarting.\n");
5020
5021 /* Tell the device to stop sending interrupts */
5022 iwl_disable_interrupts(priv);
5023
5024 iwl_irq_handle_error(priv);
5025
5026 handled |= CSR_INT_BIT_HW_ERR;
5027
5028 spin_unlock_irqrestore(&priv->lock, flags);
5029
5030 return;
5031 }
5032
5033 #ifdef CONFIG_IWLWIFI_DEBUG
5034 if (iwl_debug_level & (IWL_DL_ISR)) {
5035 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5036 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5037 IWL_DEBUG_ISR("Microcode started or stopped.\n");
5038
5039 /* Alive notification via Rx interrupt will do the real work */
5040 if (inta & CSR_INT_BIT_ALIVE)
5041 IWL_DEBUG_ISR("Alive interrupt\n");
5042 }
5043 #endif
5044 /* Safely ignore these bits for debug checks below */
5045 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5046
5047 /* HW RF KILL switch toggled (4965 only) */
5048 if (inta & CSR_INT_BIT_RF_KILL) {
5049 int hw_rf_kill = 0;
5050 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5051 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5052 hw_rf_kill = 1;
5053
5054 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5055 "RF_KILL bit toggled to %s.\n",
5056 hw_rf_kill ? "disable radio":"enable radio");
5057
5058 /* Queue restart only if RF_KILL switch was set to "kill"
5059 * when we loaded driver, and is now set to "enable".
5060 * After we're Alive, RF_KILL gets handled by
5061 * iwl_rx_card_state_notif() */
5062 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5063 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5064 queue_work(priv->workqueue, &priv->restart);
5065 }
5066
5067 handled |= CSR_INT_BIT_RF_KILL;
5068 }
5069
5070 /* Chip got too hot and stopped itself (4965 only) */
5071 if (inta & CSR_INT_BIT_CT_KILL) {
5072 IWL_ERROR("Microcode CT kill error detected.\n");
5073 handled |= CSR_INT_BIT_CT_KILL;
5074 }
5075
5076 /* Error detected by uCode */
5077 if (inta & CSR_INT_BIT_SW_ERR) {
5078 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
5079 inta);
5080 iwl_irq_handle_error(priv);
5081 handled |= CSR_INT_BIT_SW_ERR;
5082 }
5083
5084 /* uCode wakes up after power-down sleep */
5085 if (inta & CSR_INT_BIT_WAKEUP) {
5086 IWL_DEBUG_ISR("Wakeup interrupt\n");
5087 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5088 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5089 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5090 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5091 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5092 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5093 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5094
5095 handled |= CSR_INT_BIT_WAKEUP;
5096 }
5097
5098 /* All uCode command responses, including Tx command responses,
5099 * Rx "responses" (frame-received notification), and other
5100 * notifications from uCode come through here*/
5101 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5102 iwl_rx_handle(priv);
5103 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5104 }
5105
5106 if (inta & CSR_INT_BIT_FH_TX) {
5107 IWL_DEBUG_ISR("Tx interrupt\n");
5108 handled |= CSR_INT_BIT_FH_TX;
5109 }
5110
5111 if (inta & ~handled)
5112 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5113
5114 if (inta & ~CSR_INI_SET_MASK) {
5115 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5116 inta & ~CSR_INI_SET_MASK);
5117 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
5118 }
5119
5120 /* Re-enable all interrupts */
5121 iwl_enable_interrupts(priv);
5122
5123 #ifdef CONFIG_IWLWIFI_DEBUG
5124 if (iwl_debug_level & (IWL_DL_ISR)) {
5125 inta = iwl_read32(priv, CSR_INT);
5126 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5127 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5128 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5129 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5130 }
5131 #endif
5132 spin_unlock_irqrestore(&priv->lock, flags);
5133 }
5134
5135 static irqreturn_t iwl_isr(int irq, void *data)
5136 {
5137 struct iwl_priv *priv = data;
5138 u32 inta, inta_mask;
5139 u32 inta_fh;
5140 if (!priv)
5141 return IRQ_NONE;
5142
5143 spin_lock(&priv->lock);
5144
5145 /* Disable (but don't clear!) interrupts here to avoid
5146 * back-to-back ISRs and sporadic interrupts from our NIC.
5147 * If we have something to service, the tasklet will re-enable ints.
5148 * If we *don't* have something, we'll re-enable before leaving here. */
5149 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5150 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5151
5152 /* Discover which interrupts are active/pending */
5153 inta = iwl_read32(priv, CSR_INT);
5154 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5155
5156 /* Ignore interrupt if there's nothing in NIC to service.
5157 * This may be due to IRQ shared with another device,
5158 * or due to sporadic interrupts thrown from our NIC. */
5159 if (!inta && !inta_fh) {
5160 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5161 goto none;
5162 }
5163
5164 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5165 /* Hardware disappeared. It might have already raised
5166 * an interrupt */
5167 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5168 goto unplugged;
5169 }
5170
5171 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5172 inta, inta_mask, inta_fh);
5173
5174 /* iwl_irq_tasklet() will service interrupts and re-enable them */
5175 tasklet_schedule(&priv->irq_tasklet);
5176
5177 unplugged:
5178 spin_unlock(&priv->lock);
5179 return IRQ_HANDLED;
5180
5181 none:
5182 /* re-enable interrupts here since we don't have anything to service. */
5183 iwl_enable_interrupts(priv);
5184 spin_unlock(&priv->lock);
5185 return IRQ_NONE;
5186 }
5187
5188 /************************** EEPROM BANDS ****************************
5189 *
5190 * The iwl_eeprom_band definitions below provide the mapping from the
5191 * EEPROM contents to the specific channel number supported for each
5192 * band.
5193 *
5194 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5195 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5196 * The specific geography and calibration information for that channel
5197 * is contained in the eeprom map itself.
5198 *
5199 * During init, we copy the eeprom information and channel map
5200 * information into priv->channel_info_24/52 and priv->channel_map_24/52
5201 *
5202 * channel_map_24/52 provides the index in the channel_info array for a
5203 * given channel. We have to have two separate maps as there is channel
5204 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5205 * band_2
5206 *
5207 * A value of 0xff stored in the channel_map indicates that the channel
5208 * is not supported by the hardware at all.
5209 *
5210 * A value of 0xfe in the channel_map indicates that the channel is not
5211 * valid for Tx with the current hardware. This means that
5212 * while the system can tune and receive on a given channel, it may not
5213 * be able to associate or transmit any frames on that
5214 * channel. There is no corresponding channel information for that
5215 * entry.
5216 *
5217 *********************************************************************/
5218
5219 /* 2.4 GHz */
5220 static const u8 iwl_eeprom_band_1[14] = {
5221 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5222 };
5223
5224 /* 5.2 GHz bands */
5225 static const u8 iwl_eeprom_band_2[] = {
5226 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5227 };
5228
5229 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5230 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5231 };
5232
5233 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5234 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5235 };
5236
5237 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5238 145, 149, 153, 157, 161, 165
5239 };
5240
5241 static u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
5242 1, 2, 3, 4, 5, 6, 7
5243 };
5244
5245 static u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
5246 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5247 };
5248
5249 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5250 int *eeprom_ch_count,
5251 const struct iwl_eeprom_channel
5252 **eeprom_ch_info,
5253 const u8 **eeprom_ch_index)
5254 {
5255 switch (band) {
5256 case 1: /* 2.4GHz band */
5257 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5258 *eeprom_ch_info = priv->eeprom.band_1_channels;
5259 *eeprom_ch_index = iwl_eeprom_band_1;
5260 break;
5261 case 2: /* 5.2GHz band */
5262 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5263 *eeprom_ch_info = priv->eeprom.band_2_channels;
5264 *eeprom_ch_index = iwl_eeprom_band_2;
5265 break;
5266 case 3: /* 5.2GHz band */
5267 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5268 *eeprom_ch_info = priv->eeprom.band_3_channels;
5269 *eeprom_ch_index = iwl_eeprom_band_3;
5270 break;
5271 case 4: /* 5.2GHz band */
5272 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5273 *eeprom_ch_info = priv->eeprom.band_4_channels;
5274 *eeprom_ch_index = iwl_eeprom_band_4;
5275 break;
5276 case 5: /* 5.2GHz band */
5277 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5278 *eeprom_ch_info = priv->eeprom.band_5_channels;
5279 *eeprom_ch_index = iwl_eeprom_band_5;
5280 break;
5281 case 6:
5282 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5283 *eeprom_ch_info = priv->eeprom.band_24_channels;
5284 *eeprom_ch_index = iwl_eeprom_band_6;
5285 break;
5286 case 7:
5287 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5288 *eeprom_ch_info = priv->eeprom.band_52_channels;
5289 *eeprom_ch_index = iwl_eeprom_band_7;
5290 break;
5291 default:
5292 BUG();
5293 return;
5294 }
5295 }
5296
5297 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5298 int phymode, u16 channel)
5299 {
5300 int i;
5301
5302 switch (phymode) {
5303 case MODE_IEEE80211A:
5304 for (i = 14; i < priv->channel_count; i++) {
5305 if (priv->channel_info[i].channel == channel)
5306 return &priv->channel_info[i];
5307 }
5308 break;
5309
5310 case MODE_IEEE80211B:
5311 case MODE_IEEE80211G:
5312 if (channel >= 1 && channel <= 14)
5313 return &priv->channel_info[channel - 1];
5314 break;
5315
5316 }
5317
5318 return NULL;
5319 }
5320
5321 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5322 ? # x " " : "")
5323
5324 static int iwl_init_channel_map(struct iwl_priv *priv)
5325 {
5326 int eeprom_ch_count = 0;
5327 const u8 *eeprom_ch_index = NULL;
5328 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5329 int band, ch;
5330 struct iwl_channel_info *ch_info;
5331
5332 if (priv->channel_count) {
5333 IWL_DEBUG_INFO("Channel map already initialized.\n");
5334 return 0;
5335 }
5336
5337 if (priv->eeprom.version < 0x2f) {
5338 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5339 priv->eeprom.version);
5340 return -EINVAL;
5341 }
5342
5343 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5344
5345 priv->channel_count =
5346 ARRAY_SIZE(iwl_eeprom_band_1) +
5347 ARRAY_SIZE(iwl_eeprom_band_2) +
5348 ARRAY_SIZE(iwl_eeprom_band_3) +
5349 ARRAY_SIZE(iwl_eeprom_band_4) +
5350 ARRAY_SIZE(iwl_eeprom_band_5);
5351
5352 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5353
5354 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5355 priv->channel_count, GFP_KERNEL);
5356 if (!priv->channel_info) {
5357 IWL_ERROR("Could not allocate channel_info\n");
5358 priv->channel_count = 0;
5359 return -ENOMEM;
5360 }
5361
5362 ch_info = priv->channel_info;
5363
5364 /* Loop through the 5 EEPROM bands adding them in order to the
5365 * channel map we maintain (that contains additional information than
5366 * what just in the EEPROM) */
5367 for (band = 1; band <= 5; band++) {
5368
5369 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5370 &eeprom_ch_info, &eeprom_ch_index);
5371
5372 /* Loop through each band adding each of the channels */
5373 for (ch = 0; ch < eeprom_ch_count; ch++) {
5374 ch_info->channel = eeprom_ch_index[ch];
5375 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5376 MODE_IEEE80211A;
5377
5378 /* permanently store EEPROM's channel regulatory flags
5379 * and max power in channel info database. */
5380 ch_info->eeprom = eeprom_ch_info[ch];
5381
5382 /* Copy the run-time flags so they are there even on
5383 * invalid channels */
5384 ch_info->flags = eeprom_ch_info[ch].flags;
5385
5386 if (!(is_channel_valid(ch_info))) {
5387 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5388 "No traffic\n",
5389 ch_info->channel,
5390 ch_info->flags,
5391 is_channel_a_band(ch_info) ?
5392 "5.2" : "2.4");
5393 ch_info++;
5394 continue;
5395 }
5396
5397 /* Initialize regulatory-based run-time data */
5398 ch_info->max_power_avg = ch_info->curr_txpow =
5399 eeprom_ch_info[ch].max_power_avg;
5400 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5401 ch_info->min_power = 0;
5402
5403 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5404 " %ddBm): Ad-Hoc %ssupported\n",
5405 ch_info->channel,
5406 is_channel_a_band(ch_info) ?
5407 "5.2" : "2.4",
5408 CHECK_AND_PRINT(IBSS),
5409 CHECK_AND_PRINT(ACTIVE),
5410 CHECK_AND_PRINT(RADAR),
5411 CHECK_AND_PRINT(WIDE),
5412 CHECK_AND_PRINT(NARROW),
5413 CHECK_AND_PRINT(DFS),
5414 eeprom_ch_info[ch].flags,
5415 eeprom_ch_info[ch].max_power_avg,
5416 ((eeprom_ch_info[ch].
5417 flags & EEPROM_CHANNEL_IBSS)
5418 && !(eeprom_ch_info[ch].
5419 flags & EEPROM_CHANNEL_RADAR))
5420 ? "" : "not ");
5421
5422 /* Set the user_txpower_limit to the highest power
5423 * supported by any channel */
5424 if (eeprom_ch_info[ch].max_power_avg >
5425 priv->user_txpower_limit)
5426 priv->user_txpower_limit =
5427 eeprom_ch_info[ch].max_power_avg;
5428
5429 ch_info++;
5430 }
5431 }
5432
5433 for (band = 6; band <= 7; band++) {
5434 int phymode;
5435 u8 fat_extension_chan;
5436
5437 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5438 &eeprom_ch_info, &eeprom_ch_index);
5439
5440 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5441 /* Loop through each band adding each of the channels */
5442 for (ch = 0; ch < eeprom_ch_count; ch++) {
5443
5444 if ((band == 6) &&
5445 ((eeprom_ch_index[ch] == 5) ||
5446 (eeprom_ch_index[ch] == 6) ||
5447 (eeprom_ch_index[ch] == 7)))
5448 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5449 else
5450 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5451
5452 iwl4965_set_fat_chan_info(priv, phymode,
5453 eeprom_ch_index[ch],
5454 &(eeprom_ch_info[ch]),
5455 fat_extension_chan);
5456
5457 iwl4965_set_fat_chan_info(priv, phymode,
5458 (eeprom_ch_index[ch] + 4),
5459 &(eeprom_ch_info[ch]),
5460 HT_IE_EXT_CHANNEL_BELOW);
5461 }
5462 }
5463
5464 return 0;
5465 }
5466
5467 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5468 * sending probe req. This should be set long enough to hear probe responses
5469 * from more than one AP. */
5470 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5471 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5472
5473 /* For faster active scanning, scan will move to the next channel if fewer than
5474 * PLCP_QUIET_THRESH packets are heard on this channel within
5475 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5476 * time if it's a quiet channel (nothing responded to our probe, and there's
5477 * no other traffic).
5478 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5479 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5480 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5481
5482 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5483 * Must be set longer than active dwell time.
5484 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5485 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5486 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5487 #define IWL_PASSIVE_DWELL_BASE (100)
5488 #define IWL_CHANNEL_TUNE_TIME 5
5489
5490 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5491 {
5492 if (phymode == MODE_IEEE80211A)
5493 return IWL_ACTIVE_DWELL_TIME_52;
5494 else
5495 return IWL_ACTIVE_DWELL_TIME_24;
5496 }
5497
5498 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5499 {
5500 u16 active = iwl_get_active_dwell_time(priv, phymode);
5501 u16 passive = (phymode != MODE_IEEE80211A) ?
5502 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5503 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5504
5505 if (iwl_is_associated(priv)) {
5506 /* If we're associated, we clamp the maximum passive
5507 * dwell time to be 98% of the beacon interval (minus
5508 * 2 * channel tune time) */
5509 passive = priv->beacon_int;
5510 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5511 passive = IWL_PASSIVE_DWELL_BASE;
5512 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5513 }
5514
5515 if (passive <= active)
5516 passive = active + 1;
5517
5518 return passive;
5519 }
5520
5521 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5522 u8 is_active, u8 direct_mask,
5523 struct iwl_scan_channel *scan_ch)
5524 {
5525 const struct ieee80211_channel *channels = NULL;
5526 const struct ieee80211_hw_mode *hw_mode;
5527 const struct iwl_channel_info *ch_info;
5528 u16 passive_dwell = 0;
5529 u16 active_dwell = 0;
5530 int added, i;
5531
5532 hw_mode = iwl_get_hw_mode(priv, phymode);
5533 if (!hw_mode)
5534 return 0;
5535
5536 channels = hw_mode->channels;
5537
5538 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5539 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5540
5541 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5542 if (channels[i].chan ==
5543 le16_to_cpu(priv->active_rxon.channel)) {
5544 if (iwl_is_associated(priv)) {
5545 IWL_DEBUG_SCAN
5546 ("Skipping current channel %d\n",
5547 le16_to_cpu(priv->active_rxon.channel));
5548 continue;
5549 }
5550 } else if (priv->only_active_channel)
5551 continue;
5552
5553 scan_ch->channel = channels[i].chan;
5554
5555 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5556 if (!is_channel_valid(ch_info)) {
5557 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5558 scan_ch->channel);
5559 continue;
5560 }
5561
5562 if (!is_active || is_channel_passive(ch_info) ||
5563 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5564 scan_ch->type = 0; /* passive */
5565 else
5566 scan_ch->type = 1; /* active */
5567
5568 if (scan_ch->type & 1)
5569 scan_ch->type |= (direct_mask << 1);
5570
5571 if (is_channel_narrow(ch_info))
5572 scan_ch->type |= (1 << 7);
5573
5574 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5575 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5576
5577 /* Set power levels to defaults */
5578 scan_ch->tpc.dsp_atten = 110;
5579 /* scan_pwr_info->tpc.dsp_atten; */
5580
5581 /*scan_pwr_info->tpc.tx_gain; */
5582 if (phymode == MODE_IEEE80211A)
5583 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5584 else {
5585 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5586 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5587 * power level
5588 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5589 */
5590 }
5591
5592 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5593 scan_ch->channel,
5594 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5595 (scan_ch->type & 1) ?
5596 active_dwell : passive_dwell);
5597
5598 scan_ch++;
5599 added++;
5600 }
5601
5602 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5603 return added;
5604 }
5605
5606 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5607 {
5608 int i, j;
5609 for (i = 0; i < 3; i++) {
5610 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5611 for (j = 0; j < hw_mode->num_channels; j++)
5612 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5613 }
5614 }
5615
5616 static void iwl_init_hw_rates(struct iwl_priv *priv,
5617 struct ieee80211_rate *rates)
5618 {
5619 int i;
5620
5621 for (i = 0; i < IWL_RATE_COUNT; i++) {
5622 rates[i].rate = iwl_rates[i].ieee * 5;
5623 rates[i].val = i; /* Rate scaling will work on indexes */
5624 rates[i].val2 = i;
5625 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5626 /* Only OFDM have the bits-per-symbol set */
5627 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5628 rates[i].flags |= IEEE80211_RATE_OFDM;
5629 else {
5630 /*
5631 * If CCK 1M then set rate flag to CCK else CCK_2
5632 * which is CCK | PREAMBLE2
5633 */
5634 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5635 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5636 }
5637
5638 /* Set up which ones are basic rates... */
5639 if (IWL_BASIC_RATES_MASK & (1 << i))
5640 rates[i].flags |= IEEE80211_RATE_BASIC;
5641 }
5642
5643 iwl4965_init_hw_rates(priv, rates);
5644 }
5645
5646 /**
5647 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5648 */
5649 static int iwl_init_geos(struct iwl_priv *priv)
5650 {
5651 struct iwl_channel_info *ch;
5652 struct ieee80211_hw_mode *modes;
5653 struct ieee80211_channel *channels;
5654 struct ieee80211_channel *geo_ch;
5655 struct ieee80211_rate *rates;
5656 int i = 0;
5657 enum {
5658 A = 0,
5659 B = 1,
5660 G = 2,
5661 A_11N = 3,
5662 G_11N = 4,
5663 };
5664 int mode_count = 5;
5665
5666 if (priv->modes) {
5667 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5668 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5669 return 0;
5670 }
5671
5672 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5673 GFP_KERNEL);
5674 if (!modes)
5675 return -ENOMEM;
5676
5677 channels = kzalloc(sizeof(struct ieee80211_channel) *
5678 priv->channel_count, GFP_KERNEL);
5679 if (!channels) {
5680 kfree(modes);
5681 return -ENOMEM;
5682 }
5683
5684 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5685 GFP_KERNEL);
5686 if (!rates) {
5687 kfree(modes);
5688 kfree(channels);
5689 return -ENOMEM;
5690 }
5691
5692 /* 0 = 802.11a
5693 * 1 = 802.11b
5694 * 2 = 802.11g
5695 */
5696
5697 /* 5.2GHz channels start after the 2.4GHz channels */
5698 modes[A].mode = MODE_IEEE80211A;
5699 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5700 modes[A].rates = rates;
5701 modes[A].num_rates = 8; /* just OFDM */
5702 modes[A].rates = &rates[4];
5703 modes[A].num_channels = 0;
5704
5705 modes[B].mode = MODE_IEEE80211B;
5706 modes[B].channels = channels;
5707 modes[B].rates = rates;
5708 modes[B].num_rates = 4; /* just CCK */
5709 modes[B].num_channels = 0;
5710
5711 modes[G].mode = MODE_IEEE80211G;
5712 modes[G].channels = channels;
5713 modes[G].rates = rates;
5714 modes[G].num_rates = 12; /* OFDM & CCK */
5715 modes[G].num_channels = 0;
5716
5717 modes[G_11N].mode = MODE_IEEE80211G;
5718 modes[G_11N].channels = channels;
5719 modes[G_11N].num_rates = 13; /* OFDM & CCK */
5720 modes[G_11N].rates = rates;
5721 modes[G_11N].num_channels = 0;
5722
5723 modes[A_11N].mode = MODE_IEEE80211A;
5724 modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5725 modes[A_11N].rates = &rates[4];
5726 modes[A_11N].num_rates = 9; /* just OFDM */
5727 modes[A_11N].num_channels = 0;
5728
5729 priv->ieee_channels = channels;
5730 priv->ieee_rates = rates;
5731
5732 iwl_init_hw_rates(priv, rates);
5733
5734 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5735 ch = &priv->channel_info[i];
5736
5737 if (!is_channel_valid(ch)) {
5738 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5739 "skipping.\n",
5740 ch->channel, is_channel_a_band(ch) ?
5741 "5.2" : "2.4");
5742 continue;
5743 }
5744
5745 if (is_channel_a_band(ch)) {
5746 geo_ch = &modes[A].channels[modes[A].num_channels++];
5747 modes[A_11N].num_channels++;
5748 } else {
5749 geo_ch = &modes[B].channels[modes[B].num_channels++];
5750 modes[G].num_channels++;
5751 modes[G_11N].num_channels++;
5752 }
5753
5754 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5755 geo_ch->chan = ch->channel;
5756 geo_ch->power_level = ch->max_power_avg;
5757 geo_ch->antenna_max = 0xff;
5758
5759 if (is_channel_valid(ch)) {
5760 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5761 if (ch->flags & EEPROM_CHANNEL_IBSS)
5762 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5763
5764 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5765 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5766
5767 if (ch->flags & EEPROM_CHANNEL_RADAR)
5768 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5769
5770 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5771 priv->max_channel_txpower_limit =
5772 ch->max_power_avg;
5773 }
5774
5775 geo_ch->val = geo_ch->flag;
5776 }
5777
5778 if ((modes[A].num_channels == 0) && priv->is_abg) {
5779 printk(KERN_INFO DRV_NAME
5780 ": Incorrectly detected BG card as ABG. Please send "
5781 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5782 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5783 priv->is_abg = 0;
5784 }
5785
5786 printk(KERN_INFO DRV_NAME
5787 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5788 modes[G].num_channels, modes[A].num_channels);
5789
5790 /*
5791 * NOTE: We register these in preference of order -- the
5792 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5793 * a phymode based on rates or AP capabilities but seems to
5794 * configure it purely on if the channel being configured
5795 * is supported by a mode -- and the first match is taken
5796 */
5797
5798 if (modes[G].num_channels)
5799 ieee80211_register_hwmode(priv->hw, &modes[G]);
5800 if (modes[B].num_channels)
5801 ieee80211_register_hwmode(priv->hw, &modes[B]);
5802 if (modes[A].num_channels)
5803 ieee80211_register_hwmode(priv->hw, &modes[A]);
5804
5805 priv->modes = modes;
5806 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5807
5808 return 0;
5809 }
5810
5811 /******************************************************************************
5812 *
5813 * uCode download functions
5814 *
5815 ******************************************************************************/
5816
5817 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5818 {
5819 if (priv->ucode_code.v_addr != NULL) {
5820 pci_free_consistent(priv->pci_dev,
5821 priv->ucode_code.len,
5822 priv->ucode_code.v_addr,
5823 priv->ucode_code.p_addr);
5824 priv->ucode_code.v_addr = NULL;
5825 }
5826 if (priv->ucode_data.v_addr != NULL) {
5827 pci_free_consistent(priv->pci_dev,
5828 priv->ucode_data.len,
5829 priv->ucode_data.v_addr,
5830 priv->ucode_data.p_addr);
5831 priv->ucode_data.v_addr = NULL;
5832 }
5833 if (priv->ucode_data_backup.v_addr != NULL) {
5834 pci_free_consistent(priv->pci_dev,
5835 priv->ucode_data_backup.len,
5836 priv->ucode_data_backup.v_addr,
5837 priv->ucode_data_backup.p_addr);
5838 priv->ucode_data_backup.v_addr = NULL;
5839 }
5840 if (priv->ucode_init.v_addr != NULL) {
5841 pci_free_consistent(priv->pci_dev,
5842 priv->ucode_init.len,
5843 priv->ucode_init.v_addr,
5844 priv->ucode_init.p_addr);
5845 priv->ucode_init.v_addr = NULL;
5846 }
5847 if (priv->ucode_init_data.v_addr != NULL) {
5848 pci_free_consistent(priv->pci_dev,
5849 priv->ucode_init_data.len,
5850 priv->ucode_init_data.v_addr,
5851 priv->ucode_init_data.p_addr);
5852 priv->ucode_init_data.v_addr = NULL;
5853 }
5854 if (priv->ucode_boot.v_addr != NULL) {
5855 pci_free_consistent(priv->pci_dev,
5856 priv->ucode_boot.len,
5857 priv->ucode_boot.v_addr,
5858 priv->ucode_boot.p_addr);
5859 priv->ucode_boot.v_addr = NULL;
5860 }
5861 }
5862
5863 /**
5864 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5865 * looking at all data.
5866 */
5867 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5868 {
5869 u32 val;
5870 u32 save_len = len;
5871 int rc = 0;
5872 u32 errcnt;
5873
5874 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5875
5876 rc = iwl_grab_restricted_access(priv);
5877 if (rc)
5878 return rc;
5879
5880 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5881
5882 errcnt = 0;
5883 for (; len > 0; len -= sizeof(u32), image++) {
5884 /* read data comes through single port, auto-incr addr */
5885 /* NOTE: Use the debugless read so we don't flood kernel log
5886 * if IWL_DL_IO is set */
5887 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5888 if (val != le32_to_cpu(*image)) {
5889 IWL_ERROR("uCode INST section is invalid at "
5890 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5891 save_len - len, val, le32_to_cpu(*image));
5892 rc = -EIO;
5893 errcnt++;
5894 if (errcnt >= 20)
5895 break;
5896 }
5897 }
5898
5899 iwl_release_restricted_access(priv);
5900
5901 if (!errcnt)
5902 IWL_DEBUG_INFO
5903 ("ucode image in INSTRUCTION memory is good\n");
5904
5905 return rc;
5906 }
5907
5908
5909 /**
5910 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5911 * using sample data 100 bytes apart. If these sample points are good,
5912 * it's a pretty good bet that everything between them is good, too.
5913 */
5914 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5915 {
5916 u32 val;
5917 int rc = 0;
5918 u32 errcnt = 0;
5919 u32 i;
5920
5921 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5922
5923 rc = iwl_grab_restricted_access(priv);
5924 if (rc)
5925 return rc;
5926
5927 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5928 /* read data comes through single port, auto-incr addr */
5929 /* NOTE: Use the debugless read so we don't flood kernel log
5930 * if IWL_DL_IO is set */
5931 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5932 i + RTC_INST_LOWER_BOUND);
5933 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5934 if (val != le32_to_cpu(*image)) {
5935 #if 0 /* Enable this if you want to see details */
5936 IWL_ERROR("uCode INST section is invalid at "
5937 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5938 i, val, *image);
5939 #endif
5940 rc = -EIO;
5941 errcnt++;
5942 if (errcnt >= 3)
5943 break;
5944 }
5945 }
5946
5947 iwl_release_restricted_access(priv);
5948
5949 return rc;
5950 }
5951
5952
5953 /**
5954 * iwl_verify_ucode - determine which instruction image is in SRAM,
5955 * and verify its contents
5956 */
5957 static int iwl_verify_ucode(struct iwl_priv *priv)
5958 {
5959 __le32 *image;
5960 u32 len;
5961 int rc = 0;
5962
5963 /* Try bootstrap */
5964 image = (__le32 *)priv->ucode_boot.v_addr;
5965 len = priv->ucode_boot.len;
5966 rc = iwl_verify_inst_sparse(priv, image, len);
5967 if (rc == 0) {
5968 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5969 return 0;
5970 }
5971
5972 /* Try initialize */
5973 image = (__le32 *)priv->ucode_init.v_addr;
5974 len = priv->ucode_init.len;
5975 rc = iwl_verify_inst_sparse(priv, image, len);
5976 if (rc == 0) {
5977 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5978 return 0;
5979 }
5980
5981 /* Try runtime/protocol */
5982 image = (__le32 *)priv->ucode_code.v_addr;
5983 len = priv->ucode_code.len;
5984 rc = iwl_verify_inst_sparse(priv, image, len);
5985 if (rc == 0) {
5986 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5987 return 0;
5988 }
5989
5990 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5991
5992 /* Show first several data entries in instruction SRAM.
5993 * Selection of bootstrap image is arbitrary. */
5994 image = (__le32 *)priv->ucode_boot.v_addr;
5995 len = priv->ucode_boot.len;
5996 rc = iwl_verify_inst_full(priv, image, len);
5997
5998 return rc;
5999 }
6000
6001
6002 /* check contents of special bootstrap uCode SRAM */
6003 static int iwl_verify_bsm(struct iwl_priv *priv)
6004 {
6005 __le32 *image = priv->ucode_boot.v_addr;
6006 u32 len = priv->ucode_boot.len;
6007 u32 reg;
6008 u32 val;
6009
6010 IWL_DEBUG_INFO("Begin verify bsm\n");
6011
6012 /* verify BSM SRAM contents */
6013 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6014 for (reg = BSM_SRAM_LOWER_BOUND;
6015 reg < BSM_SRAM_LOWER_BOUND + len;
6016 reg += sizeof(u32), image ++) {
6017 val = iwl_read_restricted_reg(priv, reg);
6018 if (val != le32_to_cpu(*image)) {
6019 IWL_ERROR("BSM uCode verification failed at "
6020 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6021 BSM_SRAM_LOWER_BOUND,
6022 reg - BSM_SRAM_LOWER_BOUND, len,
6023 val, le32_to_cpu(*image));
6024 return -EIO;
6025 }
6026 }
6027
6028 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6029
6030 return 0;
6031 }
6032
6033 /**
6034 * iwl_load_bsm - Load bootstrap instructions
6035 *
6036 * BSM operation:
6037 *
6038 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6039 * in special SRAM that does not power down during RFKILL. When powering back
6040 * up after power-saving sleeps (or during initial uCode load), the BSM loads
6041 * the bootstrap program into the on-board processor, and starts it.
6042 *
6043 * The bootstrap program loads (via DMA) instructions and data for a new
6044 * program from host DRAM locations indicated by the host driver in the
6045 * BSM_DRAM_* registers. Once the new program is loaded, it starts
6046 * automatically.
6047 *
6048 * When initializing the NIC, the host driver points the BSM to the
6049 * "initialize" uCode image. This uCode sets up some internal data, then
6050 * notifies host via "initialize alive" that it is complete.
6051 *
6052 * The host then replaces the BSM_DRAM_* pointer values to point to the
6053 * normal runtime uCode instructions and a backup uCode data cache buffer
6054 * (filled initially with starting data values for the on-board processor),
6055 * then triggers the "initialize" uCode to load and launch the runtime uCode,
6056 * which begins normal operation.
6057 *
6058 * When doing a power-save shutdown, runtime uCode saves data SRAM into
6059 * the backup data cache in DRAM before SRAM is powered down.
6060 *
6061 * When powering back up, the BSM loads the bootstrap program. This reloads
6062 * the runtime uCode instructions and the backup data cache into SRAM,
6063 * and re-launches the runtime uCode from where it left off.
6064 */
6065 static int iwl_load_bsm(struct iwl_priv *priv)
6066 {
6067 __le32 *image = priv->ucode_boot.v_addr;
6068 u32 len = priv->ucode_boot.len;
6069 dma_addr_t pinst;
6070 dma_addr_t pdata;
6071 u32 inst_len;
6072 u32 data_len;
6073 int rc;
6074 int i;
6075 u32 done;
6076 u32 reg_offset;
6077
6078 IWL_DEBUG_INFO("Begin load bsm\n");
6079
6080 /* make sure bootstrap program is no larger than BSM's SRAM size */
6081 if (len > IWL_MAX_BSM_SIZE)
6082 return -EINVAL;
6083
6084 /* Tell bootstrap uCode where to find the "Initialize" uCode
6085 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6086 * NOTE: iwl_initialize_alive_start() will replace these values,
6087 * after the "initialize" uCode has run, to point to
6088 * runtime/protocol instructions and backup data cache. */
6089 pinst = priv->ucode_init.p_addr >> 4;
6090 pdata = priv->ucode_init_data.p_addr >> 4;
6091 inst_len = priv->ucode_init.len;
6092 data_len = priv->ucode_init_data.len;
6093
6094 rc = iwl_grab_restricted_access(priv);
6095 if (rc)
6096 return rc;
6097
6098 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6099 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6100 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6101 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6102
6103 /* Fill BSM memory with bootstrap instructions */
6104 for (reg_offset = BSM_SRAM_LOWER_BOUND;
6105 reg_offset < BSM_SRAM_LOWER_BOUND + len;
6106 reg_offset += sizeof(u32), image++)
6107 _iwl_write_restricted_reg(priv, reg_offset,
6108 le32_to_cpu(*image));
6109
6110 rc = iwl_verify_bsm(priv);
6111 if (rc) {
6112 iwl_release_restricted_access(priv);
6113 return rc;
6114 }
6115
6116 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6117 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6118 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6119 RTC_INST_LOWER_BOUND);
6120 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6121
6122 /* Load bootstrap code into instruction SRAM now,
6123 * to prepare to load "initialize" uCode */
6124 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6125 BSM_WR_CTRL_REG_BIT_START);
6126
6127 /* Wait for load of bootstrap uCode to finish */
6128 for (i = 0; i < 100; i++) {
6129 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6130 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6131 break;
6132 udelay(10);
6133 }
6134 if (i < 100)
6135 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6136 else {
6137 IWL_ERROR("BSM write did not complete!\n");
6138 return -EIO;
6139 }
6140
6141 /* Enable future boot loads whenever power management unit triggers it
6142 * (e.g. when powering back up after power-save shutdown) */
6143 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6144 BSM_WR_CTRL_REG_BIT_START_EN);
6145
6146 iwl_release_restricted_access(priv);
6147
6148 return 0;
6149 }
6150
6151 static void iwl_nic_start(struct iwl_priv *priv)
6152 {
6153 /* Remove all resets to allow NIC to operate */
6154 iwl_write32(priv, CSR_RESET, 0);
6155 }
6156
6157 /**
6158 * iwl_read_ucode - Read uCode images from disk file.
6159 *
6160 * Copy into buffers for card to fetch via bus-mastering
6161 */
6162 static int iwl_read_ucode(struct iwl_priv *priv)
6163 {
6164 struct iwl_ucode *ucode;
6165 int rc = 0;
6166 const struct firmware *ucode_raw;
6167 const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6168 u8 *src;
6169 size_t len;
6170 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6171
6172 /* Ask kernel firmware_class module to get the boot firmware off disk.
6173 * request_firmware() is synchronous, file is in memory on return. */
6174 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6175 if (rc < 0) {
6176 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6177 goto error;
6178 }
6179
6180 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6181 name, ucode_raw->size);
6182
6183 /* Make sure that we got at least our header! */
6184 if (ucode_raw->size < sizeof(*ucode)) {
6185 IWL_ERROR("File size way too small!\n");
6186 rc = -EINVAL;
6187 goto err_release;
6188 }
6189
6190 /* Data from ucode file: header followed by uCode images */
6191 ucode = (void *)ucode_raw->data;
6192
6193 ver = le32_to_cpu(ucode->ver);
6194 inst_size = le32_to_cpu(ucode->inst_size);
6195 data_size = le32_to_cpu(ucode->data_size);
6196 init_size = le32_to_cpu(ucode->init_size);
6197 init_data_size = le32_to_cpu(ucode->init_data_size);
6198 boot_size = le32_to_cpu(ucode->boot_size);
6199
6200 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6201 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6202 inst_size);
6203 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6204 data_size);
6205 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6206 init_size);
6207 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6208 init_data_size);
6209 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6210 boot_size);
6211
6212 /* Verify size of file vs. image size info in file's header */
6213 if (ucode_raw->size < sizeof(*ucode) +
6214 inst_size + data_size + init_size +
6215 init_data_size + boot_size) {
6216
6217 IWL_DEBUG_INFO("uCode file size %d too small\n",
6218 (int)ucode_raw->size);
6219 rc = -EINVAL;
6220 goto err_release;
6221 }
6222
6223 /* Verify that uCode images will fit in card's SRAM */
6224 if (inst_size > IWL_MAX_INST_SIZE) {
6225 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6226 (int)inst_size);
6227 rc = -EINVAL;
6228 goto err_release;
6229 }
6230
6231 if (data_size > IWL_MAX_DATA_SIZE) {
6232 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6233 (int)data_size);
6234 rc = -EINVAL;
6235 goto err_release;
6236 }
6237 if (init_size > IWL_MAX_INST_SIZE) {
6238 IWL_DEBUG_INFO
6239 ("uCode init instr len %d too large to fit in card\n",
6240 (int)init_size);
6241 rc = -EINVAL;
6242 goto err_release;
6243 }
6244 if (init_data_size > IWL_MAX_DATA_SIZE) {
6245 IWL_DEBUG_INFO
6246 ("uCode init data len %d too large to fit in card\n",
6247 (int)init_data_size);
6248 rc = -EINVAL;
6249 goto err_release;
6250 }
6251 if (boot_size > IWL_MAX_BSM_SIZE) {
6252 IWL_DEBUG_INFO
6253 ("uCode boot instr len %d too large to fit in bsm\n",
6254 (int)boot_size);
6255 rc = -EINVAL;
6256 goto err_release;
6257 }
6258
6259 /* Allocate ucode buffers for card's bus-master loading ... */
6260
6261 /* Runtime instructions and 2 copies of data:
6262 * 1) unmodified from disk
6263 * 2) backup cache for save/restore during power-downs */
6264 priv->ucode_code.len = inst_size;
6265 priv->ucode_code.v_addr =
6266 pci_alloc_consistent(priv->pci_dev,
6267 priv->ucode_code.len,
6268 &(priv->ucode_code.p_addr));
6269
6270 priv->ucode_data.len = data_size;
6271 priv->ucode_data.v_addr =
6272 pci_alloc_consistent(priv->pci_dev,
6273 priv->ucode_data.len,
6274 &(priv->ucode_data.p_addr));
6275
6276 priv->ucode_data_backup.len = data_size;
6277 priv->ucode_data_backup.v_addr =
6278 pci_alloc_consistent(priv->pci_dev,
6279 priv->ucode_data_backup.len,
6280 &(priv->ucode_data_backup.p_addr));
6281
6282
6283 /* Initialization instructions and data */
6284 priv->ucode_init.len = init_size;
6285 priv->ucode_init.v_addr =
6286 pci_alloc_consistent(priv->pci_dev,
6287 priv->ucode_init.len,
6288 &(priv->ucode_init.p_addr));
6289
6290 priv->ucode_init_data.len = init_data_size;
6291 priv->ucode_init_data.v_addr =
6292 pci_alloc_consistent(priv->pci_dev,
6293 priv->ucode_init_data.len,
6294 &(priv->ucode_init_data.p_addr));
6295
6296 /* Bootstrap (instructions only, no data) */
6297 priv->ucode_boot.len = boot_size;
6298 priv->ucode_boot.v_addr =
6299 pci_alloc_consistent(priv->pci_dev,
6300 priv->ucode_boot.len,
6301 &(priv->ucode_boot.p_addr));
6302
6303 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6304 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6305 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6306 goto err_pci_alloc;
6307
6308 /* Copy images into buffers for card's bus-master reads ... */
6309
6310 /* Runtime instructions (first block of data in file) */
6311 src = &ucode->data[0];
6312 len = priv->ucode_code.len;
6313 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6314 (int)len);
6315 memcpy(priv->ucode_code.v_addr, src, len);
6316 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6317 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6318
6319 /* Runtime data (2nd block)
6320 * NOTE: Copy into backup buffer will be done in iwl_up() */
6321 src = &ucode->data[inst_size];
6322 len = priv->ucode_data.len;
6323 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6324 (int)len);
6325 memcpy(priv->ucode_data.v_addr, src, len);
6326 memcpy(priv->ucode_data_backup.v_addr, src, len);
6327
6328 /* Initialization instructions (3rd block) */
6329 if (init_size) {
6330 src = &ucode->data[inst_size + data_size];
6331 len = priv->ucode_init.len;
6332 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6333 (int)len);
6334 memcpy(priv->ucode_init.v_addr, src, len);
6335 }
6336
6337 /* Initialization data (4th block) */
6338 if (init_data_size) {
6339 src = &ucode->data[inst_size + data_size + init_size];
6340 len = priv->ucode_init_data.len;
6341 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6342 (int)len);
6343 memcpy(priv->ucode_init_data.v_addr, src, len);
6344 }
6345
6346 /* Bootstrap instructions (5th block) */
6347 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6348 len = priv->ucode_boot.len;
6349 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6350 (int)len);
6351 memcpy(priv->ucode_boot.v_addr, src, len);
6352
6353 /* We have our copies now, allow OS release its copies */
6354 release_firmware(ucode_raw);
6355 return 0;
6356
6357 err_pci_alloc:
6358 IWL_ERROR("failed to allocate pci memory\n");
6359 rc = -ENOMEM;
6360 iwl_dealloc_ucode_pci(priv);
6361
6362 err_release:
6363 release_firmware(ucode_raw);
6364
6365 error:
6366 return rc;
6367 }
6368
6369
6370 /**
6371 * iwl_set_ucode_ptrs - Set uCode address location
6372 *
6373 * Tell initialization uCode where to find runtime uCode.
6374 *
6375 * BSM registers initially contain pointers to initialization uCode.
6376 * We need to replace them to load runtime uCode inst and data,
6377 * and to save runtime data when powering down.
6378 */
6379 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6380 {
6381 dma_addr_t pinst;
6382 dma_addr_t pdata;
6383 int rc = 0;
6384 unsigned long flags;
6385
6386 /* bits 35:4 for 4965 */
6387 pinst = priv->ucode_code.p_addr >> 4;
6388 pdata = priv->ucode_data_backup.p_addr >> 4;
6389
6390 spin_lock_irqsave(&priv->lock, flags);
6391 rc = iwl_grab_restricted_access(priv);
6392 if (rc) {
6393 spin_unlock_irqrestore(&priv->lock, flags);
6394 return rc;
6395 }
6396
6397 /* Tell bootstrap uCode where to find image to load */
6398 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6399 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6400 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6401 priv->ucode_data.len);
6402
6403 /* Inst bytecount must be last to set up, bit 31 signals uCode
6404 * that all new ptr/size info is in place */
6405 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6406 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6407
6408 iwl_release_restricted_access(priv);
6409
6410 spin_unlock_irqrestore(&priv->lock, flags);
6411
6412 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6413
6414 return rc;
6415 }
6416
6417 /**
6418 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6419 *
6420 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6421 *
6422 * The 4965 "initialize" ALIVE reply contains calibration data for:
6423 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6424 * (3945 does not contain this data).
6425 *
6426 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6427 */
6428 static void iwl_init_alive_start(struct iwl_priv *priv)
6429 {
6430 /* Check alive response for "valid" sign from uCode */
6431 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6432 /* We had an error bringing up the hardware, so take it
6433 * all the way back down so we can try again */
6434 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6435 goto restart;
6436 }
6437
6438 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6439 * This is a paranoid check, because we would not have gotten the
6440 * "initialize" alive if code weren't properly loaded. */
6441 if (iwl_verify_ucode(priv)) {
6442 /* Runtime instruction load was bad;
6443 * take it all the way back down so we can try again */
6444 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6445 goto restart;
6446 }
6447
6448 /* Calculate temperature */
6449 priv->temperature = iwl4965_get_temperature(priv);
6450
6451 /* Send pointers to protocol/runtime uCode image ... init code will
6452 * load and launch runtime uCode, which will send us another "Alive"
6453 * notification. */
6454 IWL_DEBUG_INFO("Initialization Alive received.\n");
6455 if (iwl_set_ucode_ptrs(priv)) {
6456 /* Runtime instruction load won't happen;
6457 * take it all the way back down so we can try again */
6458 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6459 goto restart;
6460 }
6461 return;
6462
6463 restart:
6464 queue_work(priv->workqueue, &priv->restart);
6465 }
6466
6467
6468 /**
6469 * iwl_alive_start - called after REPLY_ALIVE notification received
6470 * from protocol/runtime uCode (initialization uCode's
6471 * Alive gets handled by iwl_init_alive_start()).
6472 */
6473 static void iwl_alive_start(struct iwl_priv *priv)
6474 {
6475 int rc = 0;
6476
6477 IWL_DEBUG_INFO("Runtime Alive received.\n");
6478
6479 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6480 /* We had an error bringing up the hardware, so take it
6481 * all the way back down so we can try again */
6482 IWL_DEBUG_INFO("Alive failed.\n");
6483 goto restart;
6484 }
6485
6486 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6487 * This is a paranoid check, because we would not have gotten the
6488 * "runtime" alive if code weren't properly loaded. */
6489 if (iwl_verify_ucode(priv)) {
6490 /* Runtime instruction load was bad;
6491 * take it all the way back down so we can try again */
6492 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6493 goto restart;
6494 }
6495
6496 iwl_clear_stations_table(priv);
6497
6498 rc = iwl4965_alive_notify(priv);
6499 if (rc) {
6500 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6501 rc);
6502 goto restart;
6503 }
6504
6505 /* After the ALIVE response, we can process host commands */
6506 set_bit(STATUS_ALIVE, &priv->status);
6507
6508 /* Clear out the uCode error bit if it is set */
6509 clear_bit(STATUS_FW_ERROR, &priv->status);
6510
6511 rc = iwl_init_channel_map(priv);
6512 if (rc) {
6513 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6514 return;
6515 }
6516
6517 iwl_init_geos(priv);
6518
6519 if (iwl_is_rfkill(priv))
6520 return;
6521
6522 if (!priv->mac80211_registered) {
6523 /* Unlock so any user space entry points can call back into
6524 * the driver without a deadlock... */
6525 mutex_unlock(&priv->mutex);
6526 iwl_rate_control_register(priv->hw);
6527 rc = ieee80211_register_hw(priv->hw);
6528 priv->hw->conf.beacon_int = 100;
6529 mutex_lock(&priv->mutex);
6530
6531 if (rc) {
6532 iwl_rate_control_unregister(priv->hw);
6533 IWL_ERROR("Failed to register network "
6534 "device (error %d)\n", rc);
6535 return;
6536 }
6537
6538 priv->mac80211_registered = 1;
6539
6540 iwl_reset_channel_flag(priv);
6541 } else
6542 ieee80211_start_queues(priv->hw);
6543
6544 priv->active_rate = priv->rates_mask;
6545 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6546
6547 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6548
6549 if (iwl_is_associated(priv)) {
6550 struct iwl_rxon_cmd *active_rxon =
6551 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6552
6553 memcpy(&priv->staging_rxon, &priv->active_rxon,
6554 sizeof(priv->staging_rxon));
6555 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6556 } else {
6557 /* Initialize our rx_config data */
6558 iwl_connection_init_rx_config(priv);
6559 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6560 }
6561
6562 /* Configure BT coexistence */
6563 iwl_send_bt_config(priv);
6564
6565 /* Configure the adapter for unassociated operation */
6566 iwl_commit_rxon(priv);
6567
6568 /* At this point, the NIC is initialized and operational */
6569 priv->notif_missed_beacons = 0;
6570 set_bit(STATUS_READY, &priv->status);
6571
6572 iwl4965_rf_kill_ct_config(priv);
6573 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6574
6575 if (priv->error_recovering)
6576 iwl_error_recovery(priv);
6577
6578 return;
6579
6580 restart:
6581 queue_work(priv->workqueue, &priv->restart);
6582 }
6583
6584 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6585
6586 static void __iwl_down(struct iwl_priv *priv)
6587 {
6588 unsigned long flags;
6589 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6590 struct ieee80211_conf *conf = NULL;
6591
6592 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6593
6594 conf = ieee80211_get_hw_conf(priv->hw);
6595
6596 if (!exit_pending)
6597 set_bit(STATUS_EXIT_PENDING, &priv->status);
6598
6599 iwl_clear_stations_table(priv);
6600
6601 /* Unblock any waiting calls */
6602 wake_up_interruptible_all(&priv->wait_command_queue);
6603
6604 /* Wipe out the EXIT_PENDING status bit if we are not actually
6605 * exiting the module */
6606 if (!exit_pending)
6607 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6608
6609 /* stop and reset the on-board processor */
6610 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6611
6612 /* tell the device to stop sending interrupts */
6613 iwl_disable_interrupts(priv);
6614
6615 if (priv->mac80211_registered)
6616 ieee80211_stop_queues(priv->hw);
6617
6618 /* If we have not previously called iwl_init() then
6619 * clear all bits but the RF Kill and SUSPEND bits and return */
6620 if (!iwl_is_init(priv)) {
6621 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6622 STATUS_RF_KILL_HW |
6623 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6624 STATUS_RF_KILL_SW |
6625 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6626 STATUS_IN_SUSPEND;
6627 goto exit;
6628 }
6629
6630 /* ...otherwise clear out all the status bits but the RF Kill and
6631 * SUSPEND bits and continue taking the NIC down. */
6632 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6633 STATUS_RF_KILL_HW |
6634 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6635 STATUS_RF_KILL_SW |
6636 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6637 STATUS_IN_SUSPEND |
6638 test_bit(STATUS_FW_ERROR, &priv->status) <<
6639 STATUS_FW_ERROR;
6640
6641 spin_lock_irqsave(&priv->lock, flags);
6642 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6643 spin_unlock_irqrestore(&priv->lock, flags);
6644
6645 iwl_hw_txq_ctx_stop(priv);
6646 iwl_hw_rxq_stop(priv);
6647
6648 spin_lock_irqsave(&priv->lock, flags);
6649 if (!iwl_grab_restricted_access(priv)) {
6650 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6651 APMG_CLK_VAL_DMA_CLK_RQT);
6652 iwl_release_restricted_access(priv);
6653 }
6654 spin_unlock_irqrestore(&priv->lock, flags);
6655
6656 udelay(5);
6657
6658 iwl_hw_nic_stop_master(priv);
6659 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6660 iwl_hw_nic_reset(priv);
6661
6662 exit:
6663 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6664
6665 if (priv->ibss_beacon)
6666 dev_kfree_skb(priv->ibss_beacon);
6667 priv->ibss_beacon = NULL;
6668
6669 /* clear out any free frames */
6670 iwl_clear_free_frames(priv);
6671 }
6672
6673 static void iwl_down(struct iwl_priv *priv)
6674 {
6675 mutex_lock(&priv->mutex);
6676 __iwl_down(priv);
6677 mutex_unlock(&priv->mutex);
6678
6679 iwl_cancel_deferred_work(priv);
6680 }
6681
6682 #define MAX_HW_RESTARTS 5
6683
6684 static int __iwl_up(struct iwl_priv *priv)
6685 {
6686 DECLARE_MAC_BUF(mac);
6687 int rc, i;
6688 u32 hw_rf_kill = 0;
6689
6690 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6691 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6692 return -EIO;
6693 }
6694
6695 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6696 IWL_WARNING("Radio disabled by SW RF kill (module "
6697 "parameter)\n");
6698 return 0;
6699 }
6700
6701 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6702 IWL_ERROR("ucode not available for device bringup\n");
6703 return -EIO;
6704 }
6705
6706 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6707
6708 rc = iwl_hw_nic_init(priv);
6709 if (rc) {
6710 IWL_ERROR("Unable to int nic\n");
6711 return rc;
6712 }
6713
6714 /* make sure rfkill handshake bits are cleared */
6715 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6716 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6717 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6718
6719 /* clear (again), then enable host interrupts */
6720 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6721 iwl_enable_interrupts(priv);
6722
6723 /* really make sure rfkill handshake bits are cleared */
6724 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6725 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6726
6727 /* Copy original ucode data image from disk into backup cache.
6728 * This will be used to initialize the on-board processor's
6729 * data SRAM for a clean start when the runtime program first loads. */
6730 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6731 priv->ucode_data.len);
6732
6733 /* If platform's RF_KILL switch is set to KILL,
6734 * wait for BIT_INT_RF_KILL interrupt before loading uCode
6735 * and getting things started */
6736 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6737 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6738 hw_rf_kill = 1;
6739
6740 if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6741 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6742 return 0;
6743 }
6744
6745 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6746
6747 iwl_clear_stations_table(priv);
6748
6749 /* load bootstrap state machine,
6750 * load bootstrap program into processor's memory,
6751 * prepare to load the "initialize" uCode */
6752 rc = iwl_load_bsm(priv);
6753
6754 if (rc) {
6755 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6756 continue;
6757 }
6758
6759 /* start card; "initialize" will load runtime ucode */
6760 iwl_nic_start(priv);
6761
6762 /* MAC Address location in EEPROM same for 3945/4965 */
6763 get_eeprom_mac(priv, priv->mac_addr);
6764 IWL_DEBUG_INFO("MAC address: %s\n",
6765 print_mac(mac, priv->mac_addr));
6766
6767 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6768
6769 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6770
6771 return 0;
6772 }
6773
6774 set_bit(STATUS_EXIT_PENDING, &priv->status);
6775 __iwl_down(priv);
6776
6777 /* tried to restart and config the device for as long as our
6778 * patience could withstand */
6779 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6780 return -EIO;
6781 }
6782
6783
6784 /*****************************************************************************
6785 *
6786 * Workqueue callbacks
6787 *
6788 *****************************************************************************/
6789
6790 static void iwl_bg_init_alive_start(struct work_struct *data)
6791 {
6792 struct iwl_priv *priv =
6793 container_of(data, struct iwl_priv, init_alive_start.work);
6794
6795 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6796 return;
6797
6798 mutex_lock(&priv->mutex);
6799 iwl_init_alive_start(priv);
6800 mutex_unlock(&priv->mutex);
6801 }
6802
6803 static void iwl_bg_alive_start(struct work_struct *data)
6804 {
6805 struct iwl_priv *priv =
6806 container_of(data, struct iwl_priv, alive_start.work);
6807
6808 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6809 return;
6810
6811 mutex_lock(&priv->mutex);
6812 iwl_alive_start(priv);
6813 mutex_unlock(&priv->mutex);
6814 }
6815
6816 static void iwl_bg_rf_kill(struct work_struct *work)
6817 {
6818 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6819
6820 wake_up_interruptible(&priv->wait_command_queue);
6821
6822 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6823 return;
6824
6825 mutex_lock(&priv->mutex);
6826
6827 if (!iwl_is_rfkill(priv)) {
6828 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6829 "HW and/or SW RF Kill no longer active, restarting "
6830 "device\n");
6831 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6832 queue_work(priv->workqueue, &priv->restart);
6833 } else {
6834
6835 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6836 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6837 "disabled by SW switch\n");
6838 else
6839 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6840 "Kill switch must be turned off for "
6841 "wireless networking to work.\n");
6842 }
6843 mutex_unlock(&priv->mutex);
6844 }
6845
6846 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6847
6848 static void iwl_bg_scan_check(struct work_struct *data)
6849 {
6850 struct iwl_priv *priv =
6851 container_of(data, struct iwl_priv, scan_check.work);
6852
6853 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6854 return;
6855
6856 mutex_lock(&priv->mutex);
6857 if (test_bit(STATUS_SCANNING, &priv->status) ||
6858 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6859 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6860 "Scan completion watchdog resetting adapter (%dms)\n",
6861 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6862
6863 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6864 iwl_send_scan_abort(priv);
6865 }
6866 mutex_unlock(&priv->mutex);
6867 }
6868
6869 static void iwl_bg_request_scan(struct work_struct *data)
6870 {
6871 struct iwl_priv *priv =
6872 container_of(data, struct iwl_priv, request_scan);
6873 struct iwl_host_cmd cmd = {
6874 .id = REPLY_SCAN_CMD,
6875 .len = sizeof(struct iwl_scan_cmd),
6876 .meta.flags = CMD_SIZE_HUGE,
6877 };
6878 int rc = 0;
6879 struct iwl_scan_cmd *scan;
6880 struct ieee80211_conf *conf = NULL;
6881 u8 direct_mask;
6882 int phymode;
6883
6884 conf = ieee80211_get_hw_conf(priv->hw);
6885
6886 mutex_lock(&priv->mutex);
6887
6888 if (!iwl_is_ready(priv)) {
6889 IWL_WARNING("request scan called when driver not ready.\n");
6890 goto done;
6891 }
6892
6893 /* Make sure the scan wasn't cancelled before this queued work
6894 * was given the chance to run... */
6895 if (!test_bit(STATUS_SCANNING, &priv->status))
6896 goto done;
6897
6898 /* This should never be called or scheduled if there is currently
6899 * a scan active in the hardware. */
6900 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6901 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6902 "Ignoring second request.\n");
6903 rc = -EIO;
6904 goto done;
6905 }
6906
6907 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6908 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6909 goto done;
6910 }
6911
6912 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6913 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6914 goto done;
6915 }
6916
6917 if (iwl_is_rfkill(priv)) {
6918 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6919 goto done;
6920 }
6921
6922 if (!test_bit(STATUS_READY, &priv->status)) {
6923 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6924 goto done;
6925 }
6926
6927 if (!priv->scan_bands) {
6928 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6929 goto done;
6930 }
6931
6932 if (!priv->scan) {
6933 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6934 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6935 if (!priv->scan) {
6936 rc = -ENOMEM;
6937 goto done;
6938 }
6939 }
6940 scan = priv->scan;
6941 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6942
6943 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6944 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6945
6946 if (iwl_is_associated(priv)) {
6947 u16 interval = 0;
6948 u32 extra;
6949 u32 suspend_time = 100;
6950 u32 scan_suspend_time = 100;
6951 unsigned long flags;
6952
6953 IWL_DEBUG_INFO("Scanning while associated...\n");
6954
6955 spin_lock_irqsave(&priv->lock, flags);
6956 interval = priv->beacon_int;
6957 spin_unlock_irqrestore(&priv->lock, flags);
6958
6959 scan->suspend_time = 0;
6960 scan->max_out_time = cpu_to_le32(200 * 1024);
6961 if (!interval)
6962 interval = suspend_time;
6963
6964 extra = (suspend_time / interval) << 22;
6965 scan_suspend_time = (extra |
6966 ((suspend_time % interval) * 1024));
6967 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6968 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6969 scan_suspend_time, interval);
6970 }
6971
6972 /* We should add the ability for user to lock to PASSIVE ONLY */
6973 if (priv->one_direct_scan) {
6974 IWL_DEBUG_SCAN
6975 ("Kicking off one direct scan for '%s'\n",
6976 iwl_escape_essid(priv->direct_ssid,
6977 priv->direct_ssid_len));
6978 scan->direct_scan[0].id = WLAN_EID_SSID;
6979 scan->direct_scan[0].len = priv->direct_ssid_len;
6980 memcpy(scan->direct_scan[0].ssid,
6981 priv->direct_ssid, priv->direct_ssid_len);
6982 direct_mask = 1;
6983 } else if (!iwl_is_associated(priv) && priv->essid_len) {
6984 scan->direct_scan[0].id = WLAN_EID_SSID;
6985 scan->direct_scan[0].len = priv->essid_len;
6986 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6987 direct_mask = 1;
6988 } else
6989 direct_mask = 0;
6990
6991 /* We don't build a direct scan probe request; the uCode will do
6992 * that based on the direct_mask added to each channel entry */
6993 scan->tx_cmd.len = cpu_to_le16(
6994 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6995 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6996 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6997 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6998 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6999
7000 /* flags + rate selection */
7001
7002 scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7003
7004 switch (priv->scan_bands) {
7005 case 2:
7006 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7007 scan->tx_cmd.rate_n_flags =
7008 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7009 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7010
7011 scan->good_CRC_th = 0;
7012 phymode = MODE_IEEE80211G;
7013 break;
7014
7015 case 1:
7016 scan->tx_cmd.rate_n_flags =
7017 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7018 RATE_MCS_ANT_B_MSK);
7019 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7020 phymode = MODE_IEEE80211A;
7021 break;
7022
7023 default:
7024 IWL_WARNING("Invalid scan band count\n");
7025 goto done;
7026 }
7027
7028 /* select Rx chains */
7029
7030 /* Force use of chains B and C (0x6) for scan Rx.
7031 * Avoid A (0x1) because of its off-channel reception on A-band.
7032 * MIMO is not used here, but value is required to make uCode happy. */
7033 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7034 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7035 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7036 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7037
7038 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7039 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7040
7041 if (direct_mask)
7042 IWL_DEBUG_SCAN
7043 ("Initiating direct scan for %s.\n",
7044 iwl_escape_essid(priv->essid, priv->essid_len));
7045 else
7046 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7047
7048 scan->channel_count =
7049 iwl_get_channels_for_scan(
7050 priv, phymode, 1, /* active */
7051 direct_mask,
7052 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7053
7054 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7055 scan->channel_count * sizeof(struct iwl_scan_channel);
7056 cmd.data = scan;
7057 scan->len = cpu_to_le16(cmd.len);
7058
7059 set_bit(STATUS_SCAN_HW, &priv->status);
7060 rc = iwl_send_cmd_sync(priv, &cmd);
7061 if (rc)
7062 goto done;
7063
7064 queue_delayed_work(priv->workqueue, &priv->scan_check,
7065 IWL_SCAN_CHECK_WATCHDOG);
7066
7067 mutex_unlock(&priv->mutex);
7068 return;
7069
7070 done:
7071 /* inform mac80211 sacn aborted */
7072 queue_work(priv->workqueue, &priv->scan_completed);
7073 mutex_unlock(&priv->mutex);
7074 }
7075
7076 static void iwl_bg_up(struct work_struct *data)
7077 {
7078 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7079
7080 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7081 return;
7082
7083 mutex_lock(&priv->mutex);
7084 __iwl_up(priv);
7085 mutex_unlock(&priv->mutex);
7086 }
7087
7088 static void iwl_bg_restart(struct work_struct *data)
7089 {
7090 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7091
7092 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7093 return;
7094
7095 iwl_down(priv);
7096 queue_work(priv->workqueue, &priv->up);
7097 }
7098
7099 static void iwl_bg_rx_replenish(struct work_struct *data)
7100 {
7101 struct iwl_priv *priv =
7102 container_of(data, struct iwl_priv, rx_replenish);
7103
7104 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7105 return;
7106
7107 mutex_lock(&priv->mutex);
7108 iwl_rx_replenish(priv);
7109 mutex_unlock(&priv->mutex);
7110 }
7111
7112 static void iwl_bg_post_associate(struct work_struct *data)
7113 {
7114 struct iwl_priv *priv = container_of(data, struct iwl_priv,
7115 post_associate.work);
7116
7117 int rc = 0;
7118 struct ieee80211_conf *conf = NULL;
7119 DECLARE_MAC_BUF(mac);
7120
7121 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7122 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7123 return;
7124 }
7125
7126 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7127 priv->assoc_id,
7128 print_mac(mac, priv->active_rxon.bssid_addr));
7129
7130
7131 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7132 return;
7133
7134 mutex_lock(&priv->mutex);
7135
7136 if (!priv->interface_id || !priv->is_open) {
7137 mutex_unlock(&priv->mutex);
7138 return;
7139 }
7140 iwl_scan_cancel_timeout(priv, 200);
7141
7142 conf = ieee80211_get_hw_conf(priv->hw);
7143
7144 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7145 iwl_commit_rxon(priv);
7146
7147 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7148 iwl_setup_rxon_timing(priv);
7149 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7150 sizeof(priv->rxon_timing), &priv->rxon_timing);
7151 if (rc)
7152 IWL_WARNING("REPLY_RXON_TIMING failed - "
7153 "Attempting to continue.\n");
7154
7155 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7156
7157 #ifdef CONFIG_IWLWIFI_HT
7158 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7159 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7160 else {
7161 priv->active_rate_ht[0] = 0;
7162 priv->active_rate_ht[1] = 0;
7163 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7164 }
7165 #endif /* CONFIG_IWLWIFI_HT*/
7166 iwl4965_set_rxon_chain(priv);
7167 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7168
7169 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7170 priv->assoc_id, priv->beacon_int);
7171
7172 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7173 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7174 else
7175 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7176
7177 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7178 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7179 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7180 else
7181 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7182
7183 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7184 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7185
7186 }
7187
7188 iwl_commit_rxon(priv);
7189
7190 switch (priv->iw_mode) {
7191 case IEEE80211_IF_TYPE_STA:
7192 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7193 break;
7194
7195 case IEEE80211_IF_TYPE_IBSS:
7196
7197 /* clear out the station table */
7198 iwl_clear_stations_table(priv);
7199
7200 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7201 iwl_rxon_add_station(priv, priv->bssid, 0);
7202 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7203 iwl_send_beacon_cmd(priv);
7204
7205 break;
7206
7207 default:
7208 IWL_ERROR("%s Should not be called in %d mode\n",
7209 __FUNCTION__, priv->iw_mode);
7210 break;
7211 }
7212
7213 iwl_sequence_reset(priv);
7214
7215 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7216 /* Enable Rx differential gain and sensitivity calibrations */
7217 iwl4965_chain_noise_reset(priv);
7218 priv->start_calib = 1;
7219 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7220
7221 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7222 priv->assoc_station_added = 1;
7223
7224 #ifdef CONFIG_IWLWIFI_QOS
7225 iwl_activate_qos(priv, 0);
7226 #endif /* CONFIG_IWLWIFI_QOS */
7227 mutex_unlock(&priv->mutex);
7228 }
7229
7230 static void iwl_bg_abort_scan(struct work_struct *work)
7231 {
7232 struct iwl_priv *priv = container_of(work, struct iwl_priv,
7233 abort_scan);
7234
7235 if (!iwl_is_ready(priv))
7236 return;
7237
7238 mutex_lock(&priv->mutex);
7239
7240 set_bit(STATUS_SCAN_ABORTING, &priv->status);
7241 iwl_send_scan_abort(priv);
7242
7243 mutex_unlock(&priv->mutex);
7244 }
7245
7246 static void iwl_bg_scan_completed(struct work_struct *work)
7247 {
7248 struct iwl_priv *priv =
7249 container_of(work, struct iwl_priv, scan_completed);
7250
7251 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7252
7253 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7254 return;
7255
7256 ieee80211_scan_completed(priv->hw);
7257
7258 /* Since setting the TXPOWER may have been deferred while
7259 * performing the scan, fire one off */
7260 mutex_lock(&priv->mutex);
7261 iwl_hw_reg_send_txpower(priv);
7262 mutex_unlock(&priv->mutex);
7263 }
7264
7265 /*****************************************************************************
7266 *
7267 * mac80211 entry point functions
7268 *
7269 *****************************************************************************/
7270
7271 static int iwl_mac_start(struct ieee80211_hw *hw)
7272 {
7273 struct iwl_priv *priv = hw->priv;
7274
7275 IWL_DEBUG_MAC80211("enter\n");
7276
7277 /* we should be verifying the device is ready to be opened */
7278 mutex_lock(&priv->mutex);
7279
7280 priv->is_open = 1;
7281
7282 if (!iwl_is_rfkill(priv))
7283 ieee80211_start_queues(priv->hw);
7284
7285 mutex_unlock(&priv->mutex);
7286 IWL_DEBUG_MAC80211("leave\n");
7287 return 0;
7288 }
7289
7290 static void iwl_mac_stop(struct ieee80211_hw *hw)
7291 {
7292 struct iwl_priv *priv = hw->priv;
7293
7294 IWL_DEBUG_MAC80211("enter\n");
7295
7296
7297 mutex_lock(&priv->mutex);
7298 /* stop mac, cancel any scan request and clear
7299 * RXON_FILTER_ASSOC_MSK BIT
7300 */
7301 priv->is_open = 0;
7302 iwl_scan_cancel_timeout(priv, 100);
7303 cancel_delayed_work(&priv->post_associate);
7304 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7305 iwl_commit_rxon(priv);
7306 mutex_unlock(&priv->mutex);
7307
7308 IWL_DEBUG_MAC80211("leave\n");
7309 }
7310
7311 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7312 struct ieee80211_tx_control *ctl)
7313 {
7314 struct iwl_priv *priv = hw->priv;
7315
7316 IWL_DEBUG_MAC80211("enter\n");
7317
7318 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7319 IWL_DEBUG_MAC80211("leave - monitor\n");
7320 return -1;
7321 }
7322
7323 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7324 ctl->tx_rate);
7325
7326 if (iwl_tx_skb(priv, skb, ctl))
7327 dev_kfree_skb_any(skb);
7328
7329 IWL_DEBUG_MAC80211("leave\n");
7330 return 0;
7331 }
7332
7333 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7334 struct ieee80211_if_init_conf *conf)
7335 {
7336 struct iwl_priv *priv = hw->priv;
7337 unsigned long flags;
7338 DECLARE_MAC_BUF(mac);
7339
7340 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7341
7342 if (priv->interface_id) {
7343 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7344 return 0;
7345 }
7346
7347 spin_lock_irqsave(&priv->lock, flags);
7348 priv->interface_id = conf->if_id;
7349
7350 spin_unlock_irqrestore(&priv->lock, flags);
7351
7352 mutex_lock(&priv->mutex);
7353
7354 if (conf->mac_addr) {
7355 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7356 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7357 }
7358 iwl_set_mode(priv, conf->type);
7359
7360 IWL_DEBUG_MAC80211("leave\n");
7361 mutex_unlock(&priv->mutex);
7362
7363 return 0;
7364 }
7365
7366 /**
7367 * iwl_mac_config - mac80211 config callback
7368 *
7369 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7370 * be set inappropriately and the driver currently sets the hardware up to
7371 * use it whenever needed.
7372 */
7373 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7374 {
7375 struct iwl_priv *priv = hw->priv;
7376 const struct iwl_channel_info *ch_info;
7377 unsigned long flags;
7378
7379 mutex_lock(&priv->mutex);
7380 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7381
7382 if (!iwl_is_ready(priv)) {
7383 IWL_DEBUG_MAC80211("leave - not ready\n");
7384 mutex_unlock(&priv->mutex);
7385 return -EIO;
7386 }
7387
7388 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7389 * what is exposed through include/ declrations */
7390 if (unlikely(!iwl_param_disable_hw_scan &&
7391 test_bit(STATUS_SCANNING, &priv->status))) {
7392 IWL_DEBUG_MAC80211("leave - scanning\n");
7393 mutex_unlock(&priv->mutex);
7394 return 0;
7395 }
7396
7397 spin_lock_irqsave(&priv->lock, flags);
7398
7399 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7400 if (!is_channel_valid(ch_info)) {
7401 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7402 conf->channel, conf->phymode);
7403 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7404 spin_unlock_irqrestore(&priv->lock, flags);
7405 mutex_unlock(&priv->mutex);
7406 return -EINVAL;
7407 }
7408
7409 #ifdef CONFIG_IWLWIFI_HT
7410 /* if we are switching fron ht to 2.4 clear flags
7411 * from any ht related info since 2.4 does not
7412 * support ht */
7413 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7414 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7415 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7416 #endif
7417 )
7418 priv->staging_rxon.flags = 0;
7419 #endif /* CONFIG_IWLWIFI_HT */
7420
7421 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7422
7423 iwl_set_flags_for_phymode(priv, conf->phymode);
7424
7425 /* The list of supported rates and rate mask can be different
7426 * for each phymode; since the phymode may have changed, reset
7427 * the rate mask to what mac80211 lists */
7428 iwl_set_rate(priv);
7429
7430 spin_unlock_irqrestore(&priv->lock, flags);
7431
7432 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7433 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7434 iwl_hw_channel_switch(priv, conf->channel);
7435 mutex_unlock(&priv->mutex);
7436 return 0;
7437 }
7438 #endif
7439
7440 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7441
7442 if (!conf->radio_enabled) {
7443 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7444 mutex_unlock(&priv->mutex);
7445 return 0;
7446 }
7447
7448 if (iwl_is_rfkill(priv)) {
7449 IWL_DEBUG_MAC80211("leave - RF kill\n");
7450 mutex_unlock(&priv->mutex);
7451 return -EIO;
7452 }
7453
7454 iwl_set_rate(priv);
7455
7456 if (memcmp(&priv->active_rxon,
7457 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7458 iwl_commit_rxon(priv);
7459 else
7460 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7461
7462 IWL_DEBUG_MAC80211("leave\n");
7463
7464 mutex_unlock(&priv->mutex);
7465
7466 return 0;
7467 }
7468
7469 static void iwl_config_ap(struct iwl_priv *priv)
7470 {
7471 int rc = 0;
7472
7473 if (priv->status & STATUS_EXIT_PENDING)
7474 return;
7475
7476 /* The following should be done only at AP bring up */
7477 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7478
7479 /* RXON - unassoc (to set timing command) */
7480 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7481 iwl_commit_rxon(priv);
7482
7483 /* RXON Timing */
7484 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7485 iwl_setup_rxon_timing(priv);
7486 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7487 sizeof(priv->rxon_timing), &priv->rxon_timing);
7488 if (rc)
7489 IWL_WARNING("REPLY_RXON_TIMING failed - "
7490 "Attempting to continue.\n");
7491
7492 iwl4965_set_rxon_chain(priv);
7493
7494 /* FIXME: what should be the assoc_id for AP? */
7495 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7496 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7497 priv->staging_rxon.flags |=
7498 RXON_FLG_SHORT_PREAMBLE_MSK;
7499 else
7500 priv->staging_rxon.flags &=
7501 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7502
7503 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7504 if (priv->assoc_capability &
7505 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7506 priv->staging_rxon.flags |=
7507 RXON_FLG_SHORT_SLOT_MSK;
7508 else
7509 priv->staging_rxon.flags &=
7510 ~RXON_FLG_SHORT_SLOT_MSK;
7511
7512 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7513 priv->staging_rxon.flags &=
7514 ~RXON_FLG_SHORT_SLOT_MSK;
7515 }
7516 /* restore RXON assoc */
7517 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7518 iwl_commit_rxon(priv);
7519 #ifdef CONFIG_IWLWIFI_QOS
7520 iwl_activate_qos(priv, 1);
7521 #endif
7522 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7523 }
7524 iwl_send_beacon_cmd(priv);
7525
7526 /* FIXME - we need to add code here to detect a totally new
7527 * configuration, reset the AP, unassoc, rxon timing, assoc,
7528 * clear sta table, add BCAST sta... */
7529 }
7530
7531 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7532 struct ieee80211_if_conf *conf)
7533 {
7534 struct iwl_priv *priv = hw->priv;
7535 DECLARE_MAC_BUF(mac);
7536 unsigned long flags;
7537 int rc;
7538
7539 if (conf == NULL)
7540 return -EIO;
7541
7542 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7543 (!conf->beacon || !conf->ssid_len)) {
7544 IWL_DEBUG_MAC80211
7545 ("Leaving in AP mode because HostAPD is not ready.\n");
7546 return 0;
7547 }
7548
7549 mutex_lock(&priv->mutex);
7550
7551 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7552 if (conf->bssid)
7553 IWL_DEBUG_MAC80211("bssid: %s\n",
7554 print_mac(mac, conf->bssid));
7555
7556 /*
7557 * very dubious code was here; the probe filtering flag is never set:
7558 *
7559 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7560 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7561 */
7562 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7563 IWL_DEBUG_MAC80211("leave - scanning\n");
7564 mutex_unlock(&priv->mutex);
7565 return 0;
7566 }
7567
7568 if (priv->interface_id != if_id) {
7569 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7570 mutex_unlock(&priv->mutex);
7571 return 0;
7572 }
7573
7574 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7575 if (!conf->bssid) {
7576 conf->bssid = priv->mac_addr;
7577 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7578 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7579 print_mac(mac, conf->bssid));
7580 }
7581 if (priv->ibss_beacon)
7582 dev_kfree_skb(priv->ibss_beacon);
7583
7584 priv->ibss_beacon = conf->beacon;
7585 }
7586
7587 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7588 !is_multicast_ether_addr(conf->bssid)) {
7589 /* If there is currently a HW scan going on in the background
7590 * then we need to cancel it else the RXON below will fail. */
7591 if (iwl_scan_cancel_timeout(priv, 100)) {
7592 IWL_WARNING("Aborted scan still in progress "
7593 "after 100ms\n");
7594 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7595 mutex_unlock(&priv->mutex);
7596 return -EAGAIN;
7597 }
7598 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7599
7600 /* TODO: Audit driver for usage of these members and see
7601 * if mac80211 deprecates them (priv->bssid looks like it
7602 * shouldn't be there, but I haven't scanned the IBSS code
7603 * to verify) - jpk */
7604 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7605
7606 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7607 iwl_config_ap(priv);
7608 else {
7609 rc = iwl_commit_rxon(priv);
7610 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7611 iwl_rxon_add_station(
7612 priv, priv->active_rxon.bssid_addr, 1);
7613 }
7614
7615 } else {
7616 iwl_scan_cancel_timeout(priv, 100);
7617 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7618 iwl_commit_rxon(priv);
7619 }
7620
7621 spin_lock_irqsave(&priv->lock, flags);
7622 if (!conf->ssid_len)
7623 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7624 else
7625 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7626
7627 priv->essid_len = conf->ssid_len;
7628 spin_unlock_irqrestore(&priv->lock, flags);
7629
7630 IWL_DEBUG_MAC80211("leave\n");
7631 mutex_unlock(&priv->mutex);
7632
7633 return 0;
7634 }
7635
7636 static void iwl_configure_filter(struct ieee80211_hw *hw,
7637 unsigned int changed_flags,
7638 unsigned int *total_flags,
7639 int mc_count, struct dev_addr_list *mc_list)
7640 {
7641 /*
7642 * XXX: dummy
7643 * see also iwl_connection_init_rx_config
7644 */
7645 *total_flags = 0;
7646 }
7647
7648 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7649 struct ieee80211_if_init_conf *conf)
7650 {
7651 struct iwl_priv *priv = hw->priv;
7652
7653 IWL_DEBUG_MAC80211("enter\n");
7654
7655 mutex_lock(&priv->mutex);
7656
7657 iwl_scan_cancel_timeout(priv, 100);
7658 cancel_delayed_work(&priv->post_associate);
7659 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7660 iwl_commit_rxon(priv);
7661
7662 if (priv->interface_id == conf->if_id) {
7663 priv->interface_id = 0;
7664 memset(priv->bssid, 0, ETH_ALEN);
7665 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7666 priv->essid_len = 0;
7667 }
7668 mutex_unlock(&priv->mutex);
7669
7670 IWL_DEBUG_MAC80211("leave\n");
7671
7672 }
7673
7674 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7675 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7676 {
7677 int rc = 0;
7678 unsigned long flags;
7679 struct iwl_priv *priv = hw->priv;
7680
7681 IWL_DEBUG_MAC80211("enter\n");
7682
7683 mutex_lock(&priv->mutex);
7684 spin_lock_irqsave(&priv->lock, flags);
7685
7686 if (!iwl_is_ready_rf(priv)) {
7687 rc = -EIO;
7688 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7689 goto out_unlock;
7690 }
7691
7692 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7693 rc = -EIO;
7694 IWL_ERROR("ERROR: APs don't scan\n");
7695 goto out_unlock;
7696 }
7697
7698 /* if we just finished scan ask for delay */
7699 if (priv->last_scan_jiffies &&
7700 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7701 jiffies)) {
7702 rc = -EAGAIN;
7703 goto out_unlock;
7704 }
7705 if (len) {
7706 IWL_DEBUG_SCAN("direct scan for "
7707 "%s [%d]\n ",
7708 iwl_escape_essid(ssid, len), (int)len);
7709
7710 priv->one_direct_scan = 1;
7711 priv->direct_ssid_len = (u8)
7712 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7713 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7714 } else
7715 priv->one_direct_scan = 0;
7716
7717 rc = iwl_scan_initiate(priv);
7718
7719 IWL_DEBUG_MAC80211("leave\n");
7720
7721 out_unlock:
7722 spin_unlock_irqrestore(&priv->lock, flags);
7723 mutex_unlock(&priv->mutex);
7724
7725 return rc;
7726 }
7727
7728 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7729 const u8 *local_addr, const u8 *addr,
7730 struct ieee80211_key_conf *key)
7731 {
7732 struct iwl_priv *priv = hw->priv;
7733 DECLARE_MAC_BUF(mac);
7734 int rc = 0;
7735 u8 sta_id;
7736
7737 IWL_DEBUG_MAC80211("enter\n");
7738
7739 if (!iwl_param_hwcrypto) {
7740 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7741 return -EOPNOTSUPP;
7742 }
7743
7744 if (is_zero_ether_addr(addr))
7745 /* only support pairwise keys */
7746 return -EOPNOTSUPP;
7747
7748 sta_id = iwl_hw_find_station(priv, addr);
7749 if (sta_id == IWL_INVALID_STATION) {
7750 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7751 print_mac(mac, addr));
7752 return -EINVAL;
7753 }
7754
7755 mutex_lock(&priv->mutex);
7756
7757 iwl_scan_cancel_timeout(priv, 100);
7758
7759 switch (cmd) {
7760 case SET_KEY:
7761 rc = iwl_update_sta_key_info(priv, key, sta_id);
7762 if (!rc) {
7763 iwl_set_rxon_hwcrypto(priv, 1);
7764 iwl_commit_rxon(priv);
7765 key->hw_key_idx = sta_id;
7766 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7767 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7768 }
7769 break;
7770 case DISABLE_KEY:
7771 rc = iwl_clear_sta_key_info(priv, sta_id);
7772 if (!rc) {
7773 iwl_set_rxon_hwcrypto(priv, 0);
7774 iwl_commit_rxon(priv);
7775 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7776 }
7777 break;
7778 default:
7779 rc = -EINVAL;
7780 }
7781
7782 IWL_DEBUG_MAC80211("leave\n");
7783 mutex_unlock(&priv->mutex);
7784
7785 return rc;
7786 }
7787
7788 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7789 const struct ieee80211_tx_queue_params *params)
7790 {
7791 struct iwl_priv *priv = hw->priv;
7792 #ifdef CONFIG_IWLWIFI_QOS
7793 unsigned long flags;
7794 int q;
7795 #endif /* CONFIG_IWL_QOS */
7796
7797 IWL_DEBUG_MAC80211("enter\n");
7798
7799 if (!iwl_is_ready_rf(priv)) {
7800 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7801 return -EIO;
7802 }
7803
7804 if (queue >= AC_NUM) {
7805 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7806 return 0;
7807 }
7808
7809 #ifdef CONFIG_IWLWIFI_QOS
7810 if (!priv->qos_data.qos_enable) {
7811 priv->qos_data.qos_active = 0;
7812 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7813 return 0;
7814 }
7815 q = AC_NUM - 1 - queue;
7816
7817 spin_lock_irqsave(&priv->lock, flags);
7818
7819 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7820 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7821 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7822 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7823 cpu_to_le16((params->burst_time * 100));
7824
7825 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7826 priv->qos_data.qos_active = 1;
7827
7828 spin_unlock_irqrestore(&priv->lock, flags);
7829
7830 mutex_lock(&priv->mutex);
7831 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7832 iwl_activate_qos(priv, 1);
7833 else if (priv->assoc_id && iwl_is_associated(priv))
7834 iwl_activate_qos(priv, 0);
7835
7836 mutex_unlock(&priv->mutex);
7837
7838 #endif /*CONFIG_IWLWIFI_QOS */
7839
7840 IWL_DEBUG_MAC80211("leave\n");
7841 return 0;
7842 }
7843
7844 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7845 struct ieee80211_tx_queue_stats *stats)
7846 {
7847 struct iwl_priv *priv = hw->priv;
7848 int i, avail;
7849 struct iwl_tx_queue *txq;
7850 struct iwl_queue *q;
7851 unsigned long flags;
7852
7853 IWL_DEBUG_MAC80211("enter\n");
7854
7855 if (!iwl_is_ready_rf(priv)) {
7856 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7857 return -EIO;
7858 }
7859
7860 spin_lock_irqsave(&priv->lock, flags);
7861
7862 for (i = 0; i < AC_NUM; i++) {
7863 txq = &priv->txq[i];
7864 q = &txq->q;
7865 avail = iwl_queue_space(q);
7866
7867 stats->data[i].len = q->n_window - avail;
7868 stats->data[i].limit = q->n_window - q->high_mark;
7869 stats->data[i].count = q->n_window;
7870
7871 }
7872 spin_unlock_irqrestore(&priv->lock, flags);
7873
7874 IWL_DEBUG_MAC80211("leave\n");
7875
7876 return 0;
7877 }
7878
7879 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7880 struct ieee80211_low_level_stats *stats)
7881 {
7882 IWL_DEBUG_MAC80211("enter\n");
7883 IWL_DEBUG_MAC80211("leave\n");
7884
7885 return 0;
7886 }
7887
7888 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7889 {
7890 IWL_DEBUG_MAC80211("enter\n");
7891 IWL_DEBUG_MAC80211("leave\n");
7892
7893 return 0;
7894 }
7895
7896 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7897 {
7898 struct iwl_priv *priv = hw->priv;
7899 unsigned long flags;
7900
7901 mutex_lock(&priv->mutex);
7902 IWL_DEBUG_MAC80211("enter\n");
7903
7904 priv->lq_mngr.lq_ready = 0;
7905 #ifdef CONFIG_IWLWIFI_HT
7906 spin_lock_irqsave(&priv->lock, flags);
7907 memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7908 spin_unlock_irqrestore(&priv->lock, flags);
7909 #ifdef CONFIG_IWLWIFI_HT_AGG
7910 /* if (priv->lq_mngr.agg_ctrl.granted_ba)
7911 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7912
7913 memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7914 priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7915 priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7916 priv->lq_mngr.agg_ctrl.auto_agg = 1;
7917
7918 if (priv->lq_mngr.agg_ctrl.auto_agg)
7919 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7920 #endif /*CONFIG_IWLWIFI_HT_AGG */
7921 #endif /* CONFIG_IWLWIFI_HT */
7922
7923 #ifdef CONFIG_IWLWIFI_QOS
7924 iwl_reset_qos(priv);
7925 #endif
7926
7927 cancel_delayed_work(&priv->post_associate);
7928
7929 spin_lock_irqsave(&priv->lock, flags);
7930 priv->assoc_id = 0;
7931 priv->assoc_capability = 0;
7932 priv->call_post_assoc_from_beacon = 0;
7933 priv->assoc_station_added = 0;
7934
7935 /* new association get rid of ibss beacon skb */
7936 if (priv->ibss_beacon)
7937 dev_kfree_skb(priv->ibss_beacon);
7938
7939 priv->ibss_beacon = NULL;
7940
7941 priv->beacon_int = priv->hw->conf.beacon_int;
7942 priv->timestamp1 = 0;
7943 priv->timestamp0 = 0;
7944 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7945 priv->beacon_int = 0;
7946
7947 spin_unlock_irqrestore(&priv->lock, flags);
7948
7949 /* we are restarting association process
7950 * clear RXON_FILTER_ASSOC_MSK bit
7951 */
7952 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7953 iwl_scan_cancel_timeout(priv, 100);
7954 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7955 iwl_commit_rxon(priv);
7956 }
7957
7958 /* Per mac80211.h: This is only used in IBSS mode... */
7959 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7960
7961 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7962 mutex_unlock(&priv->mutex);
7963 return;
7964 }
7965
7966 if (!iwl_is_ready_rf(priv)) {
7967 IWL_DEBUG_MAC80211("leave - not ready\n");
7968 mutex_unlock(&priv->mutex);
7969 return;
7970 }
7971
7972 priv->only_active_channel = 0;
7973
7974 iwl_set_rate(priv);
7975
7976 mutex_unlock(&priv->mutex);
7977
7978 IWL_DEBUG_MAC80211("leave\n");
7979
7980 }
7981
7982 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7983 struct ieee80211_tx_control *control)
7984 {
7985 struct iwl_priv *priv = hw->priv;
7986 unsigned long flags;
7987
7988 mutex_lock(&priv->mutex);
7989 IWL_DEBUG_MAC80211("enter\n");
7990
7991 if (!iwl_is_ready_rf(priv)) {
7992 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7993 mutex_unlock(&priv->mutex);
7994 return -EIO;
7995 }
7996
7997 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7998 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7999 mutex_unlock(&priv->mutex);
8000 return -EIO;
8001 }
8002
8003 spin_lock_irqsave(&priv->lock, flags);
8004
8005 if (priv->ibss_beacon)
8006 dev_kfree_skb(priv->ibss_beacon);
8007
8008 priv->ibss_beacon = skb;
8009
8010 priv->assoc_id = 0;
8011
8012 IWL_DEBUG_MAC80211("leave\n");
8013 spin_unlock_irqrestore(&priv->lock, flags);
8014
8015 #ifdef CONFIG_IWLWIFI_QOS
8016 iwl_reset_qos(priv);
8017 #endif
8018
8019 queue_work(priv->workqueue, &priv->post_associate.work);
8020
8021 mutex_unlock(&priv->mutex);
8022
8023 return 0;
8024 }
8025
8026 #ifdef CONFIG_IWLWIFI_HT
8027 union ht_cap_info {
8028 struct {
8029 u16 advanced_coding_cap :1;
8030 u16 supported_chan_width_set :1;
8031 u16 mimo_power_save_mode :2;
8032 u16 green_field :1;
8033 u16 short_GI20 :1;
8034 u16 short_GI40 :1;
8035 u16 tx_stbc :1;
8036 u16 rx_stbc :1;
8037 u16 beam_forming :1;
8038 u16 delayed_ba :1;
8039 u16 maximal_amsdu_size :1;
8040 u16 cck_mode_at_40MHz :1;
8041 u16 psmp_support :1;
8042 u16 stbc_ctrl_frame_support :1;
8043 u16 sig_txop_protection_support :1;
8044 };
8045 u16 val;
8046 } __attribute__ ((packed));
8047
8048 union ht_param_info{
8049 struct {
8050 u8 max_rx_ampdu_factor :2;
8051 u8 mpdu_density :3;
8052 u8 reserved :3;
8053 };
8054 u8 val;
8055 } __attribute__ ((packed));
8056
8057 union ht_exra_param_info {
8058 struct {
8059 u8 ext_chan_offset :2;
8060 u8 tx_chan_width :1;
8061 u8 rifs_mode :1;
8062 u8 controlled_access_only :1;
8063 u8 service_interval_granularity :3;
8064 };
8065 u8 val;
8066 } __attribute__ ((packed));
8067
8068 union ht_operation_mode{
8069 struct {
8070 u16 op_mode :2;
8071 u16 non_GF :1;
8072 u16 reserved :13;
8073 };
8074 u16 val;
8075 } __attribute__ ((packed));
8076
8077
8078 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8079 struct ieee80211_ht_additional_info *ht_extra,
8080 struct sta_ht_info *ht_info_ap,
8081 struct sta_ht_info *ht_info)
8082 {
8083 union ht_cap_info cap;
8084 union ht_operation_mode op_mode;
8085 union ht_param_info param_info;
8086 union ht_exra_param_info extra_param_info;
8087
8088 IWL_DEBUG_MAC80211("enter: \n");
8089
8090 if (!ht_info) {
8091 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8092 return -1;
8093 }
8094
8095 if (ht_cap) {
8096 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8097 param_info.val = ht_cap->mac_ht_params_info;
8098 ht_info->is_ht = 1;
8099 if (cap.short_GI20)
8100 ht_info->sgf |= 0x1;
8101 if (cap.short_GI40)
8102 ht_info->sgf |= 0x2;
8103 ht_info->is_green_field = cap.green_field;
8104 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8105 ht_info->supported_chan_width = cap.supported_chan_width_set;
8106 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8107 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8108
8109 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8110 ht_info->mpdu_density = param_info.mpdu_density;
8111
8112 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8113 ht_cap->supported_mcs_set[0],
8114 ht_cap->supported_mcs_set[1]);
8115
8116 if (ht_info_ap) {
8117 ht_info->control_channel = ht_info_ap->control_channel;
8118 ht_info->extension_chan_offset =
8119 ht_info_ap->extension_chan_offset;
8120 ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8121 ht_info->operating_mode = ht_info_ap->operating_mode;
8122 }
8123
8124 if (ht_extra) {
8125 extra_param_info.val = ht_extra->ht_param;
8126 ht_info->control_channel = ht_extra->control_chan;
8127 ht_info->extension_chan_offset =
8128 extra_param_info.ext_chan_offset;
8129 ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8130 op_mode.val = (u16)
8131 le16_to_cpu(ht_extra->operation_mode);
8132 ht_info->operating_mode = op_mode.op_mode;
8133 IWL_DEBUG_MAC80211("control channel %d\n",
8134 ht_extra->control_chan);
8135 }
8136 } else
8137 ht_info->is_ht = 0;
8138
8139 IWL_DEBUG_MAC80211("leave\n");
8140 return 0;
8141 }
8142
8143 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8144 struct ieee80211_ht_capability *ht_cap,
8145 struct ieee80211_ht_additional_info *ht_extra)
8146 {
8147 struct iwl_priv *priv = hw->priv;
8148 int rs;
8149
8150 IWL_DEBUG_MAC80211("enter: \n");
8151
8152 rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8153 iwl4965_set_rxon_chain(priv);
8154
8155 if (priv && priv->assoc_id &&
8156 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8157 unsigned long flags;
8158
8159 spin_lock_irqsave(&priv->lock, flags);
8160 if (priv->beacon_int)
8161 queue_work(priv->workqueue, &priv->post_associate.work);
8162 else
8163 priv->call_post_assoc_from_beacon = 1;
8164 spin_unlock_irqrestore(&priv->lock, flags);
8165 }
8166
8167 IWL_DEBUG_MAC80211("leave: control channel %d\n",
8168 ht_extra->control_chan);
8169 return rs;
8170
8171 }
8172
8173 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8174 struct ieee80211_ht_capability *ht_cap,
8175 u8 use_wide_chan)
8176 {
8177 union ht_cap_info cap;
8178 union ht_param_info param_info;
8179
8180 memset(&cap, 0, sizeof(union ht_cap_info));
8181 memset(&param_info, 0, sizeof(union ht_param_info));
8182
8183 cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8184 cap.green_field = 1;
8185 cap.short_GI20 = 1;
8186 cap.short_GI40 = 1;
8187 cap.supported_chan_width_set = use_wide_chan;
8188 cap.mimo_power_save_mode = 0x3;
8189
8190 param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8191 param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8192 ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8193 ht_cap->mac_ht_params_info = (u8) param_info.val;
8194
8195 ht_cap->supported_mcs_set[0] = 0xff;
8196 ht_cap->supported_mcs_set[1] = 0xff;
8197 ht_cap->supported_mcs_set[4] =
8198 (cap.supported_chan_width_set) ? 0x1: 0x0;
8199 }
8200
8201 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8202 struct ieee80211_ht_capability *ht_cap)
8203 {
8204 u8 use_wide_channel = 1;
8205 struct iwl_priv *priv = hw->priv;
8206
8207 IWL_DEBUG_MAC80211("enter: \n");
8208 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8209 use_wide_channel = 0;
8210
8211 /* no fat tx allowed on 2.4GHZ */
8212 if (priv->phymode != MODE_IEEE80211A)
8213 use_wide_channel = 0;
8214
8215 iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8216 IWL_DEBUG_MAC80211("leave: \n");
8217 }
8218 #endif /*CONFIG_IWLWIFI_HT*/
8219
8220 /*****************************************************************************
8221 *
8222 * sysfs attributes
8223 *
8224 *****************************************************************************/
8225
8226 #ifdef CONFIG_IWLWIFI_DEBUG
8227
8228 /*
8229 * The following adds a new attribute to the sysfs representation
8230 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8231 * used for controlling the debug level.
8232 *
8233 * See the level definitions in iwl for details.
8234 */
8235
8236 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8237 {
8238 return sprintf(buf, "0x%08X\n", iwl_debug_level);
8239 }
8240 static ssize_t store_debug_level(struct device_driver *d,
8241 const char *buf, size_t count)
8242 {
8243 char *p = (char *)buf;
8244 u32 val;
8245
8246 val = simple_strtoul(p, &p, 0);
8247 if (p == buf)
8248 printk(KERN_INFO DRV_NAME
8249 ": %s is not in hex or decimal form.\n", buf);
8250 else
8251 iwl_debug_level = val;
8252
8253 return strnlen(buf, count);
8254 }
8255
8256 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8257 show_debug_level, store_debug_level);
8258
8259 #endif /* CONFIG_IWLWIFI_DEBUG */
8260
8261 static ssize_t show_rf_kill(struct device *d,
8262 struct device_attribute *attr, char *buf)
8263 {
8264 /*
8265 * 0 - RF kill not enabled
8266 * 1 - SW based RF kill active (sysfs)
8267 * 2 - HW based RF kill active
8268 * 3 - Both HW and SW based RF kill active
8269 */
8270 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8271 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8272 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8273
8274 return sprintf(buf, "%i\n", val);
8275 }
8276
8277 static ssize_t store_rf_kill(struct device *d,
8278 struct device_attribute *attr,
8279 const char *buf, size_t count)
8280 {
8281 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8282
8283 mutex_lock(&priv->mutex);
8284 iwl_radio_kill_sw(priv, buf[0] == '1');
8285 mutex_unlock(&priv->mutex);
8286
8287 return count;
8288 }
8289
8290 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8291
8292 static ssize_t show_temperature(struct device *d,
8293 struct device_attribute *attr, char *buf)
8294 {
8295 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8296
8297 if (!iwl_is_alive(priv))
8298 return -EAGAIN;
8299
8300 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8301 }
8302
8303 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8304
8305 static ssize_t show_rs_window(struct device *d,
8306 struct device_attribute *attr,
8307 char *buf)
8308 {
8309 struct iwl_priv *priv = d->driver_data;
8310 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8311 }
8312 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8313
8314 static ssize_t show_tx_power(struct device *d,
8315 struct device_attribute *attr, char *buf)
8316 {
8317 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8318 return sprintf(buf, "%d\n", priv->user_txpower_limit);
8319 }
8320
8321 static ssize_t store_tx_power(struct device *d,
8322 struct device_attribute *attr,
8323 const char *buf, size_t count)
8324 {
8325 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8326 char *p = (char *)buf;
8327 u32 val;
8328
8329 val = simple_strtoul(p, &p, 10);
8330 if (p == buf)
8331 printk(KERN_INFO DRV_NAME
8332 ": %s is not in decimal form.\n", buf);
8333 else
8334 iwl_hw_reg_set_txpower(priv, val);
8335
8336 return count;
8337 }
8338
8339 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8340
8341 static ssize_t show_flags(struct device *d,
8342 struct device_attribute *attr, char *buf)
8343 {
8344 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8345
8346 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8347 }
8348
8349 static ssize_t store_flags(struct device *d,
8350 struct device_attribute *attr,
8351 const char *buf, size_t count)
8352 {
8353 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8354 u32 flags = simple_strtoul(buf, NULL, 0);
8355
8356 mutex_lock(&priv->mutex);
8357 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8358 /* Cancel any currently running scans... */
8359 if (iwl_scan_cancel_timeout(priv, 100))
8360 IWL_WARNING("Could not cancel scan.\n");
8361 else {
8362 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8363 flags);
8364 priv->staging_rxon.flags = cpu_to_le32(flags);
8365 iwl_commit_rxon(priv);
8366 }
8367 }
8368 mutex_unlock(&priv->mutex);
8369
8370 return count;
8371 }
8372
8373 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8374
8375 static ssize_t show_filter_flags(struct device *d,
8376 struct device_attribute *attr, char *buf)
8377 {
8378 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8379
8380 return sprintf(buf, "0x%04X\n",
8381 le32_to_cpu(priv->active_rxon.filter_flags));
8382 }
8383
8384 static ssize_t store_filter_flags(struct device *d,
8385 struct device_attribute *attr,
8386 const char *buf, size_t count)
8387 {
8388 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8389 u32 filter_flags = simple_strtoul(buf, NULL, 0);
8390
8391 mutex_lock(&priv->mutex);
8392 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8393 /* Cancel any currently running scans... */
8394 if (iwl_scan_cancel_timeout(priv, 100))
8395 IWL_WARNING("Could not cancel scan.\n");
8396 else {
8397 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8398 "0x%04X\n", filter_flags);
8399 priv->staging_rxon.filter_flags =
8400 cpu_to_le32(filter_flags);
8401 iwl_commit_rxon(priv);
8402 }
8403 }
8404 mutex_unlock(&priv->mutex);
8405
8406 return count;
8407 }
8408
8409 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8410 store_filter_flags);
8411
8412 static ssize_t show_tune(struct device *d,
8413 struct device_attribute *attr, char *buf)
8414 {
8415 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8416
8417 return sprintf(buf, "0x%04X\n",
8418 (priv->phymode << 8) |
8419 le16_to_cpu(priv->active_rxon.channel));
8420 }
8421
8422 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8423
8424 static ssize_t store_tune(struct device *d,
8425 struct device_attribute *attr,
8426 const char *buf, size_t count)
8427 {
8428 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8429 char *p = (char *)buf;
8430 u16 tune = simple_strtoul(p, &p, 0);
8431 u8 phymode = (tune >> 8) & 0xff;
8432 u16 channel = tune & 0xff;
8433
8434 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8435
8436 mutex_lock(&priv->mutex);
8437 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8438 (priv->phymode != phymode)) {
8439 const struct iwl_channel_info *ch_info;
8440
8441 ch_info = iwl_get_channel_info(priv, phymode, channel);
8442 if (!ch_info) {
8443 IWL_WARNING("Requested invalid phymode/channel "
8444 "combination: %d %d\n", phymode, channel);
8445 mutex_unlock(&priv->mutex);
8446 return -EINVAL;
8447 }
8448
8449 /* Cancel any currently running scans... */
8450 if (iwl_scan_cancel_timeout(priv, 100))
8451 IWL_WARNING("Could not cancel scan.\n");
8452 else {
8453 IWL_DEBUG_INFO("Committing phymode and "
8454 "rxon.channel = %d %d\n",
8455 phymode, channel);
8456
8457 iwl_set_rxon_channel(priv, phymode, channel);
8458 iwl_set_flags_for_phymode(priv, phymode);
8459
8460 iwl_set_rate(priv);
8461 iwl_commit_rxon(priv);
8462 }
8463 }
8464 mutex_unlock(&priv->mutex);
8465
8466 return count;
8467 }
8468
8469 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8470
8471 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8472
8473 static ssize_t show_measurement(struct device *d,
8474 struct device_attribute *attr, char *buf)
8475 {
8476 struct iwl_priv *priv = dev_get_drvdata(d);
8477 struct iwl_spectrum_notification measure_report;
8478 u32 size = sizeof(measure_report), len = 0, ofs = 0;
8479 u8 *data = (u8 *) & measure_report;
8480 unsigned long flags;
8481
8482 spin_lock_irqsave(&priv->lock, flags);
8483 if (!(priv->measurement_status & MEASUREMENT_READY)) {
8484 spin_unlock_irqrestore(&priv->lock, flags);
8485 return 0;
8486 }
8487 memcpy(&measure_report, &priv->measure_report, size);
8488 priv->measurement_status = 0;
8489 spin_unlock_irqrestore(&priv->lock, flags);
8490
8491 while (size && (PAGE_SIZE - len)) {
8492 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8493 PAGE_SIZE - len, 1);
8494 len = strlen(buf);
8495 if (PAGE_SIZE - len)
8496 buf[len++] = '\n';
8497
8498 ofs += 16;
8499 size -= min(size, 16U);
8500 }
8501
8502 return len;
8503 }
8504
8505 static ssize_t store_measurement(struct device *d,
8506 struct device_attribute *attr,
8507 const char *buf, size_t count)
8508 {
8509 struct iwl_priv *priv = dev_get_drvdata(d);
8510 struct ieee80211_measurement_params params = {
8511 .channel = le16_to_cpu(priv->active_rxon.channel),
8512 .start_time = cpu_to_le64(priv->last_tsf),
8513 .duration = cpu_to_le16(1),
8514 };
8515 u8 type = IWL_MEASURE_BASIC;
8516 u8 buffer[32];
8517 u8 channel;
8518
8519 if (count) {
8520 char *p = buffer;
8521 strncpy(buffer, buf, min(sizeof(buffer), count));
8522 channel = simple_strtoul(p, NULL, 0);
8523 if (channel)
8524 params.channel = channel;
8525
8526 p = buffer;
8527 while (*p && *p != ' ')
8528 p++;
8529 if (*p)
8530 type = simple_strtoul(p + 1, NULL, 0);
8531 }
8532
8533 IWL_DEBUG_INFO("Invoking measurement of type %d on "
8534 "channel %d (for '%s')\n", type, params.channel, buf);
8535 iwl_get_measurement(priv, &params, type);
8536
8537 return count;
8538 }
8539
8540 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8541 show_measurement, store_measurement);
8542 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8543
8544 static ssize_t store_retry_rate(struct device *d,
8545 struct device_attribute *attr,
8546 const char *buf, size_t count)
8547 {
8548 struct iwl_priv *priv = dev_get_drvdata(d);
8549
8550 priv->retry_rate = simple_strtoul(buf, NULL, 0);
8551 if (priv->retry_rate <= 0)
8552 priv->retry_rate = 1;
8553
8554 return count;
8555 }
8556
8557 static ssize_t show_retry_rate(struct device *d,
8558 struct device_attribute *attr, char *buf)
8559 {
8560 struct iwl_priv *priv = dev_get_drvdata(d);
8561 return sprintf(buf, "%d", priv->retry_rate);
8562 }
8563
8564 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8565 store_retry_rate);
8566
8567 static ssize_t store_power_level(struct device *d,
8568 struct device_attribute *attr,
8569 const char *buf, size_t count)
8570 {
8571 struct iwl_priv *priv = dev_get_drvdata(d);
8572 int rc;
8573 int mode;
8574
8575 mode = simple_strtoul(buf, NULL, 0);
8576 mutex_lock(&priv->mutex);
8577
8578 if (!iwl_is_ready(priv)) {
8579 rc = -EAGAIN;
8580 goto out;
8581 }
8582
8583 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8584 mode = IWL_POWER_AC;
8585 else
8586 mode |= IWL_POWER_ENABLED;
8587
8588 if (mode != priv->power_mode) {
8589 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8590 if (rc) {
8591 IWL_DEBUG_MAC80211("failed setting power mode.\n");
8592 goto out;
8593 }
8594 priv->power_mode = mode;
8595 }
8596
8597 rc = count;
8598
8599 out:
8600 mutex_unlock(&priv->mutex);
8601 return rc;
8602 }
8603
8604 #define MAX_WX_STRING 80
8605
8606 /* Values are in microsecond */
8607 static const s32 timeout_duration[] = {
8608 350000,
8609 250000,
8610 75000,
8611 37000,
8612 25000,
8613 };
8614 static const s32 period_duration[] = {
8615 400000,
8616 700000,
8617 1000000,
8618 1000000,
8619 1000000
8620 };
8621
8622 static ssize_t show_power_level(struct device *d,
8623 struct device_attribute *attr, char *buf)
8624 {
8625 struct iwl_priv *priv = dev_get_drvdata(d);
8626 int level = IWL_POWER_LEVEL(priv->power_mode);
8627 char *p = buf;
8628
8629 p += sprintf(p, "%d ", level);
8630 switch (level) {
8631 case IWL_POWER_MODE_CAM:
8632 case IWL_POWER_AC:
8633 p += sprintf(p, "(AC)");
8634 break;
8635 case IWL_POWER_BATTERY:
8636 p += sprintf(p, "(BATTERY)");
8637 break;
8638 default:
8639 p += sprintf(p,
8640 "(Timeout %dms, Period %dms)",
8641 timeout_duration[level - 1] / 1000,
8642 period_duration[level - 1] / 1000);
8643 }
8644
8645 if (!(priv->power_mode & IWL_POWER_ENABLED))
8646 p += sprintf(p, " OFF\n");
8647 else
8648 p += sprintf(p, " \n");
8649
8650 return (p - buf + 1);
8651
8652 }
8653
8654 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8655 store_power_level);
8656
8657 static ssize_t show_channels(struct device *d,
8658 struct device_attribute *attr, char *buf)
8659 {
8660 struct iwl_priv *priv = dev_get_drvdata(d);
8661 int len = 0, i;
8662 struct ieee80211_channel *channels = NULL;
8663 const struct ieee80211_hw_mode *hw_mode = NULL;
8664 int count = 0;
8665
8666 if (!iwl_is_ready(priv))
8667 return -EAGAIN;
8668
8669 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8670 if (!hw_mode)
8671 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8672 if (hw_mode) {
8673 channels = hw_mode->channels;
8674 count = hw_mode->num_channels;
8675 }
8676
8677 len +=
8678 sprintf(&buf[len],
8679 "Displaying %d channels in 2.4GHz band "
8680 "(802.11bg):\n", count);
8681
8682 for (i = 0; i < count; i++)
8683 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8684 channels[i].chan,
8685 channels[i].power_level,
8686 channels[i].
8687 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8688 " (IEEE 802.11h required)" : "",
8689 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8690 || (channels[i].
8691 flag &
8692 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8693 ", IBSS",
8694 channels[i].
8695 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8696 "active/passive" : "passive only");
8697
8698 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8699 if (hw_mode) {
8700 channels = hw_mode->channels;
8701 count = hw_mode->num_channels;
8702 } else {
8703 channels = NULL;
8704 count = 0;
8705 }
8706
8707 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8708 "(802.11a):\n", count);
8709
8710 for (i = 0; i < count; i++)
8711 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8712 channels[i].chan,
8713 channels[i].power_level,
8714 channels[i].
8715 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8716 " (IEEE 802.11h required)" : "",
8717 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8718 || (channels[i].
8719 flag &
8720 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8721 ", IBSS",
8722 channels[i].
8723 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8724 "active/passive" : "passive only");
8725
8726 return len;
8727 }
8728
8729 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8730
8731 static ssize_t show_statistics(struct device *d,
8732 struct device_attribute *attr, char *buf)
8733 {
8734 struct iwl_priv *priv = dev_get_drvdata(d);
8735 u32 size = sizeof(struct iwl_notif_statistics);
8736 u32 len = 0, ofs = 0;
8737 u8 *data = (u8 *) & priv->statistics;
8738 int rc = 0;
8739
8740 if (!iwl_is_alive(priv))
8741 return -EAGAIN;
8742
8743 mutex_lock(&priv->mutex);
8744 rc = iwl_send_statistics_request(priv);
8745 mutex_unlock(&priv->mutex);
8746
8747 if (rc) {
8748 len = sprintf(buf,
8749 "Error sending statistics request: 0x%08X\n", rc);
8750 return len;
8751 }
8752
8753 while (size && (PAGE_SIZE - len)) {
8754 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8755 PAGE_SIZE - len, 1);
8756 len = strlen(buf);
8757 if (PAGE_SIZE - len)
8758 buf[len++] = '\n';
8759
8760 ofs += 16;
8761 size -= min(size, 16U);
8762 }
8763
8764 return len;
8765 }
8766
8767 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8768
8769 static ssize_t show_antenna(struct device *d,
8770 struct device_attribute *attr, char *buf)
8771 {
8772 struct iwl_priv *priv = dev_get_drvdata(d);
8773
8774 if (!iwl_is_alive(priv))
8775 return -EAGAIN;
8776
8777 return sprintf(buf, "%d\n", priv->antenna);
8778 }
8779
8780 static ssize_t store_antenna(struct device *d,
8781 struct device_attribute *attr,
8782 const char *buf, size_t count)
8783 {
8784 int ant;
8785 struct iwl_priv *priv = dev_get_drvdata(d);
8786
8787 if (count == 0)
8788 return 0;
8789
8790 if (sscanf(buf, "%1i", &ant) != 1) {
8791 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8792 return count;
8793 }
8794
8795 if ((ant >= 0) && (ant <= 2)) {
8796 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8797 priv->antenna = (enum iwl_antenna)ant;
8798 } else
8799 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8800
8801
8802 return count;
8803 }
8804
8805 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8806
8807 static ssize_t show_status(struct device *d,
8808 struct device_attribute *attr, char *buf)
8809 {
8810 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8811 if (!iwl_is_alive(priv))
8812 return -EAGAIN;
8813 return sprintf(buf, "0x%08x\n", (int)priv->status);
8814 }
8815
8816 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8817
8818 static ssize_t dump_error_log(struct device *d,
8819 struct device_attribute *attr,
8820 const char *buf, size_t count)
8821 {
8822 char *p = (char *)buf;
8823
8824 if (p[0] == '1')
8825 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8826
8827 return strnlen(buf, count);
8828 }
8829
8830 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8831
8832 static ssize_t dump_event_log(struct device *d,
8833 struct device_attribute *attr,
8834 const char *buf, size_t count)
8835 {
8836 char *p = (char *)buf;
8837
8838 if (p[0] == '1')
8839 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8840
8841 return strnlen(buf, count);
8842 }
8843
8844 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8845
8846 /*****************************************************************************
8847 *
8848 * driver setup and teardown
8849 *
8850 *****************************************************************************/
8851
8852 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8853 {
8854 priv->workqueue = create_workqueue(DRV_NAME);
8855
8856 init_waitqueue_head(&priv->wait_command_queue);
8857
8858 INIT_WORK(&priv->up, iwl_bg_up);
8859 INIT_WORK(&priv->restart, iwl_bg_restart);
8860 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8861 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8862 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8863 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8864 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8865 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8866 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8867 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8868 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8869 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8870
8871 iwl_hw_setup_deferred_work(priv);
8872
8873 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8874 iwl_irq_tasklet, (unsigned long)priv);
8875 }
8876
8877 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8878 {
8879 iwl_hw_cancel_deferred_work(priv);
8880
8881 cancel_delayed_work_sync(&priv->init_alive_start);
8882 cancel_delayed_work(&priv->scan_check);
8883 cancel_delayed_work(&priv->alive_start);
8884 cancel_delayed_work(&priv->post_associate);
8885 cancel_work_sync(&priv->beacon_update);
8886 }
8887
8888 static struct attribute *iwl_sysfs_entries[] = {
8889 &dev_attr_antenna.attr,
8890 &dev_attr_channels.attr,
8891 &dev_attr_dump_errors.attr,
8892 &dev_attr_dump_events.attr,
8893 &dev_attr_flags.attr,
8894 &dev_attr_filter_flags.attr,
8895 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8896 &dev_attr_measurement.attr,
8897 #endif
8898 &dev_attr_power_level.attr,
8899 &dev_attr_retry_rate.attr,
8900 &dev_attr_rf_kill.attr,
8901 &dev_attr_rs_window.attr,
8902 &dev_attr_statistics.attr,
8903 &dev_attr_status.attr,
8904 &dev_attr_temperature.attr,
8905 &dev_attr_tune.attr,
8906 &dev_attr_tx_power.attr,
8907
8908 NULL
8909 };
8910
8911 static struct attribute_group iwl_attribute_group = {
8912 .name = NULL, /* put in device directory */
8913 .attrs = iwl_sysfs_entries,
8914 };
8915
8916 static struct ieee80211_ops iwl_hw_ops = {
8917 .tx = iwl_mac_tx,
8918 .start = iwl_mac_start,
8919 .stop = iwl_mac_stop,
8920 .add_interface = iwl_mac_add_interface,
8921 .remove_interface = iwl_mac_remove_interface,
8922 .config = iwl_mac_config,
8923 .config_interface = iwl_mac_config_interface,
8924 .configure_filter = iwl_configure_filter,
8925 .set_key = iwl_mac_set_key,
8926 .get_stats = iwl_mac_get_stats,
8927 .get_tx_stats = iwl_mac_get_tx_stats,
8928 .conf_tx = iwl_mac_conf_tx,
8929 .get_tsf = iwl_mac_get_tsf,
8930 .reset_tsf = iwl_mac_reset_tsf,
8931 .beacon_update = iwl_mac_beacon_update,
8932 #ifdef CONFIG_IWLWIFI_HT
8933 .conf_ht = iwl_mac_conf_ht,
8934 .get_ht_capab = iwl_mac_get_ht_capab,
8935 #ifdef CONFIG_IWLWIFI_HT_AGG
8936 .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8937 .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8938 .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8939 .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8940 #endif /* CONFIG_IWLWIFI_HT_AGG */
8941 #endif /* CONFIG_IWLWIFI_HT */
8942 .hw_scan = iwl_mac_hw_scan
8943 };
8944
8945 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8946 {
8947 int err = 0;
8948 struct iwl_priv *priv;
8949 struct ieee80211_hw *hw;
8950 int i;
8951
8952 if (iwl_param_disable_hw_scan) {
8953 IWL_DEBUG_INFO("Disabling hw_scan\n");
8954 iwl_hw_ops.hw_scan = NULL;
8955 }
8956
8957 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8958 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8959 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8960 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8961 err = -EINVAL;
8962 goto out;
8963 }
8964
8965 /* mac80211 allocates memory for this device instance, including
8966 * space for this driver's private structure */
8967 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8968 if (hw == NULL) {
8969 IWL_ERROR("Can not allocate network device\n");
8970 err = -ENOMEM;
8971 goto out;
8972 }
8973 SET_IEEE80211_DEV(hw, &pdev->dev);
8974
8975 hw->rate_control_algorithm = "iwl-4965-rs";
8976
8977 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8978 priv = hw->priv;
8979 priv->hw = hw;
8980
8981 priv->pci_dev = pdev;
8982 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8983 #ifdef CONFIG_IWLWIFI_DEBUG
8984 iwl_debug_level = iwl_param_debug;
8985 atomic_set(&priv->restrict_refcnt, 0);
8986 #endif
8987 priv->retry_rate = 1;
8988
8989 priv->ibss_beacon = NULL;
8990
8991 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8992 * the range of signal quality values that we'll provide.
8993 * Negative values for level/noise indicate that we'll provide dBm.
8994 * For WE, at least, non-0 values here *enable* display of values
8995 * in app (iwconfig). */
8996 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8997 hw->max_noise = -20; /* noise level, negative indicates dBm */
8998 hw->max_signal = 100; /* link quality indication (%) */
8999
9000 /* Tell mac80211 our Tx characteristics */
9001 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9002
9003 hw->queues = 4;
9004 #ifdef CONFIG_IWLWIFI_HT
9005 #ifdef CONFIG_IWLWIFI_HT_AGG
9006 hw->queues = 16;
9007 #endif /* CONFIG_IWLWIFI_HT_AGG */
9008 #endif /* CONFIG_IWLWIFI_HT */
9009
9010 spin_lock_init(&priv->lock);
9011 spin_lock_init(&priv->power_data.lock);
9012 spin_lock_init(&priv->sta_lock);
9013 spin_lock_init(&priv->hcmd_lock);
9014 spin_lock_init(&priv->lq_mngr.lock);
9015
9016 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9017 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9018
9019 INIT_LIST_HEAD(&priv->free_frames);
9020
9021 mutex_init(&priv->mutex);
9022 if (pci_enable_device(pdev)) {
9023 err = -ENODEV;
9024 goto out_ieee80211_free_hw;
9025 }
9026
9027 pci_set_master(pdev);
9028
9029 iwl_clear_stations_table(priv);
9030
9031 priv->data_retry_limit = -1;
9032 priv->ieee_channels = NULL;
9033 priv->ieee_rates = NULL;
9034 priv->phymode = -1;
9035
9036 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9037 if (!err)
9038 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9039 if (err) {
9040 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9041 goto out_pci_disable_device;
9042 }
9043
9044 pci_set_drvdata(pdev, priv);
9045 err = pci_request_regions(pdev, DRV_NAME);
9046 if (err)
9047 goto out_pci_disable_device;
9048 /* We disable the RETRY_TIMEOUT register (0x41) to keep
9049 * PCI Tx retries from interfering with C3 CPU state */
9050 pci_write_config_byte(pdev, 0x41, 0x00);
9051 priv->hw_base = pci_iomap(pdev, 0, 0);
9052 if (!priv->hw_base) {
9053 err = -ENODEV;
9054 goto out_pci_release_regions;
9055 }
9056
9057 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9058 (unsigned long long) pci_resource_len(pdev, 0));
9059 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9060
9061 /* Initialize module parameter values here */
9062
9063 if (iwl_param_disable) {
9064 set_bit(STATUS_RF_KILL_SW, &priv->status);
9065 IWL_DEBUG_INFO("Radio disabled.\n");
9066 }
9067
9068 priv->iw_mode = IEEE80211_IF_TYPE_STA;
9069
9070 priv->ps_mode = 0;
9071 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9072 priv->is_ht_enabled = 1;
9073 priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9074 priv->valid_antenna = 0x7; /* assume all 3 connected */
9075 priv->ps_mode = IWL_MIMO_PS_NONE;
9076 priv->cck_power_index_compensation = iwl_read32(
9077 priv, CSR_HW_REV_WA_REG);
9078
9079 iwl4965_set_rxon_chain(priv);
9080
9081 printk(KERN_INFO DRV_NAME
9082 ": Detected Intel Wireless WiFi Link 4965AGN\n");
9083
9084 /* Device-specific setup */
9085 if (iwl_hw_set_hw_setting(priv)) {
9086 IWL_ERROR("failed to set hw settings\n");
9087 mutex_unlock(&priv->mutex);
9088 goto out_iounmap;
9089 }
9090
9091 #ifdef CONFIG_IWLWIFI_QOS
9092 if (iwl_param_qos_enable)
9093 priv->qos_data.qos_enable = 1;
9094
9095 iwl_reset_qos(priv);
9096
9097 priv->qos_data.qos_active = 0;
9098 priv->qos_data.qos_cap.val = 0;
9099 #endif /* CONFIG_IWLWIFI_QOS */
9100
9101 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9102 iwl_setup_deferred_work(priv);
9103 iwl_setup_rx_handlers(priv);
9104
9105 priv->rates_mask = IWL_RATES_MASK;
9106 /* If power management is turned on, default to AC mode */
9107 priv->power_mode = IWL_POWER_AC;
9108 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9109
9110 pci_enable_msi(pdev);
9111
9112 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9113 if (err) {
9114 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9115 goto out_disable_msi;
9116 }
9117
9118 mutex_lock(&priv->mutex);
9119
9120 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9121 if (err) {
9122 IWL_ERROR("failed to create sysfs device attributes\n");
9123 mutex_unlock(&priv->mutex);
9124 goto out_release_irq;
9125 }
9126
9127 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9128 * ucode filename and max sizes are card-specific. */
9129 err = iwl_read_ucode(priv);
9130 if (err) {
9131 IWL_ERROR("Could not read microcode: %d\n", err);
9132 mutex_unlock(&priv->mutex);
9133 goto out_pci_alloc;
9134 }
9135
9136 mutex_unlock(&priv->mutex);
9137
9138 IWL_DEBUG_INFO("Queing UP work.\n");
9139
9140 queue_work(priv->workqueue, &priv->up);
9141
9142 return 0;
9143
9144 out_pci_alloc:
9145 iwl_dealloc_ucode_pci(priv);
9146
9147 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9148
9149 out_release_irq:
9150 free_irq(pdev->irq, priv);
9151
9152 out_disable_msi:
9153 pci_disable_msi(pdev);
9154 destroy_workqueue(priv->workqueue);
9155 priv->workqueue = NULL;
9156 iwl_unset_hw_setting(priv);
9157
9158 out_iounmap:
9159 pci_iounmap(pdev, priv->hw_base);
9160 out_pci_release_regions:
9161 pci_release_regions(pdev);
9162 out_pci_disable_device:
9163 pci_disable_device(pdev);
9164 pci_set_drvdata(pdev, NULL);
9165 out_ieee80211_free_hw:
9166 ieee80211_free_hw(priv->hw);
9167 out:
9168 return err;
9169 }
9170
9171 static void iwl_pci_remove(struct pci_dev *pdev)
9172 {
9173 struct iwl_priv *priv = pci_get_drvdata(pdev);
9174 struct list_head *p, *q;
9175 int i;
9176
9177 if (!priv)
9178 return;
9179
9180 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9181
9182 set_bit(STATUS_EXIT_PENDING, &priv->status);
9183
9184 iwl_down(priv);
9185
9186 /* Free MAC hash list for ADHOC */
9187 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9188 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9189 list_del(p);
9190 kfree(list_entry(p, struct iwl_ibss_seq, list));
9191 }
9192 }
9193
9194 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9195
9196 iwl_dealloc_ucode_pci(priv);
9197
9198 if (priv->rxq.bd)
9199 iwl_rx_queue_free(priv, &priv->rxq);
9200 iwl_hw_txq_ctx_free(priv);
9201
9202 iwl_unset_hw_setting(priv);
9203 iwl_clear_stations_table(priv);
9204
9205 if (priv->mac80211_registered) {
9206 ieee80211_unregister_hw(priv->hw);
9207 iwl_rate_control_unregister(priv->hw);
9208 }
9209
9210 /*netif_stop_queue(dev); */
9211 flush_workqueue(priv->workqueue);
9212
9213 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9214 * priv->workqueue... so we can't take down the workqueue
9215 * until now... */
9216 destroy_workqueue(priv->workqueue);
9217 priv->workqueue = NULL;
9218
9219 free_irq(pdev->irq, priv);
9220 pci_disable_msi(pdev);
9221 pci_iounmap(pdev, priv->hw_base);
9222 pci_release_regions(pdev);
9223 pci_disable_device(pdev);
9224 pci_set_drvdata(pdev, NULL);
9225
9226 kfree(priv->channel_info);
9227
9228 kfree(priv->ieee_channels);
9229 kfree(priv->ieee_rates);
9230
9231 if (priv->ibss_beacon)
9232 dev_kfree_skb(priv->ibss_beacon);
9233
9234 ieee80211_free_hw(priv->hw);
9235 }
9236
9237 #ifdef CONFIG_PM
9238
9239 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9240 {
9241 struct iwl_priv *priv = pci_get_drvdata(pdev);
9242
9243 set_bit(STATUS_IN_SUSPEND, &priv->status);
9244
9245 /* Take down the device; powers it off, etc. */
9246 iwl_down(priv);
9247
9248 if (priv->mac80211_registered)
9249 ieee80211_stop_queues(priv->hw);
9250
9251 pci_save_state(pdev);
9252 pci_disable_device(pdev);
9253 pci_set_power_state(pdev, PCI_D3hot);
9254
9255 return 0;
9256 }
9257
9258 static void iwl_resume(struct iwl_priv *priv)
9259 {
9260 unsigned long flags;
9261
9262 /* The following it a temporary work around due to the
9263 * suspend / resume not fully initializing the NIC correctly.
9264 * Without all of the following, resume will not attempt to take
9265 * down the NIC (it shouldn't really need to) and will just try
9266 * and bring the NIC back up. However that fails during the
9267 * ucode verification process. This then causes iwl_down to be
9268 * called *after* iwl_hw_nic_init() has succeeded -- which
9269 * then lets the next init sequence succeed. So, we've
9270 * replicated all of that NIC init code here... */
9271
9272 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9273
9274 iwl_hw_nic_init(priv);
9275
9276 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9277 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9278 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9279 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9280 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9281 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9282
9283 /* tell the device to stop sending interrupts */
9284 iwl_disable_interrupts(priv);
9285
9286 spin_lock_irqsave(&priv->lock, flags);
9287 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9288
9289 if (!iwl_grab_restricted_access(priv)) {
9290 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9291 APMG_CLK_VAL_DMA_CLK_RQT);
9292 iwl_release_restricted_access(priv);
9293 }
9294 spin_unlock_irqrestore(&priv->lock, flags);
9295
9296 udelay(5);
9297
9298 iwl_hw_nic_reset(priv);
9299
9300 /* Bring the device back up */
9301 clear_bit(STATUS_IN_SUSPEND, &priv->status);
9302 queue_work(priv->workqueue, &priv->up);
9303 }
9304
9305 static int iwl_pci_resume(struct pci_dev *pdev)
9306 {
9307 struct iwl_priv *priv = pci_get_drvdata(pdev);
9308 int err;
9309
9310 printk(KERN_INFO "Coming out of suspend...\n");
9311
9312 pci_set_power_state(pdev, PCI_D0);
9313 err = pci_enable_device(pdev);
9314 pci_restore_state(pdev);
9315
9316 /*
9317 * Suspend/Resume resets the PCI configuration space, so we have to
9318 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9319 * from interfering with C3 CPU state. pci_restore_state won't help
9320 * here since it only restores the first 64 bytes pci config header.
9321 */
9322 pci_write_config_byte(pdev, 0x41, 0x00);
9323
9324 iwl_resume(priv);
9325
9326 return 0;
9327 }
9328
9329 #endif /* CONFIG_PM */
9330
9331 /*****************************************************************************
9332 *
9333 * driver and module entry point
9334 *
9335 *****************************************************************************/
9336
9337 static struct pci_driver iwl_driver = {
9338 .name = DRV_NAME,
9339 .id_table = iwl_hw_card_ids,
9340 .probe = iwl_pci_probe,
9341 .remove = __devexit_p(iwl_pci_remove),
9342 #ifdef CONFIG_PM
9343 .suspend = iwl_pci_suspend,
9344 .resume = iwl_pci_resume,
9345 #endif
9346 };
9347
9348 static int __init iwl_init(void)
9349 {
9350
9351 int ret;
9352 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9353 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9354 ret = pci_register_driver(&iwl_driver);
9355 if (ret) {
9356 IWL_ERROR("Unable to initialize PCI module\n");
9357 return ret;
9358 }
9359 #ifdef CONFIG_IWLWIFI_DEBUG
9360 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9361 if (ret) {
9362 IWL_ERROR("Unable to create driver sysfs file\n");
9363 pci_unregister_driver(&iwl_driver);
9364 return ret;
9365 }
9366 #endif
9367
9368 return ret;
9369 }
9370
9371 static void __exit iwl_exit(void)
9372 {
9373 #ifdef CONFIG_IWLWIFI_DEBUG
9374 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9375 #endif
9376 pci_unregister_driver(&iwl_driver);
9377 }
9378
9379 module_param_named(antenna, iwl_param_antenna, int, 0444);
9380 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9381 module_param_named(disable, iwl_param_disable, int, 0444);
9382 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9383 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9384 MODULE_PARM_DESC(hwcrypto,
9385 "using hardware crypto engine (default 0 [software])\n");
9386 module_param_named(debug, iwl_param_debug, int, 0444);
9387 MODULE_PARM_DESC(debug, "debug output mask");
9388 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9389 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9390
9391 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9392 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9393
9394 /* QoS */
9395 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9396 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9397
9398 module_exit(iwl_exit);
9399 module_init(iwl_init);
Linux kernel - Deliverables
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