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iwlwifi: mark more functions/variables static
[mirror_ubuntu-artful-kernel.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 static int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
70 struct iwl_tx_queue *txq);
71
72 /******************************************************************************
73 *
74 * module boiler plate
75 *
76 ******************************************************************************/
77
78 /* module parameters */
79 static int iwl_param_disable_hw_scan;
80 static int iwl_param_debug;
81 static int iwl_param_disable; /* def: enable radio */
82 static int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
83 int iwl_param_hwcrypto; /* def: using software encryption */
84 static int iwl_param_qos_enable = 1;
85 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
86
87 /*
88 * module name, copyright, version, etc.
89 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
90 */
91
92 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
93
94 #ifdef CONFIG_IWLWIFI_DEBUG
95 #define VD "d"
96 #else
97 #define VD
98 #endif
99
100 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
101 #define VS "s"
102 #else
103 #define VS
104 #endif
105
106 #define IWLWIFI_VERSION "1.1.19k" VD VS
107 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
108 #define DRV_VERSION IWLWIFI_VERSION
109
110 /* Change firmware file name, using "-" and incrementing number,
111 * *only* when uCode interface or architecture changes so that it
112 * is not compatible with earlier drivers.
113 * This number will also appear in << 8 position of 1st dword of uCode file */
114 #define IWL4965_UCODE_API "-1"
115
116 MODULE_DESCRIPTION(DRV_DESCRIPTION);
117 MODULE_VERSION(DRV_VERSION);
118 MODULE_AUTHOR(DRV_COPYRIGHT);
119 MODULE_LICENSE("GPL");
120
121 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
122 {
123 u16 fc = le16_to_cpu(hdr->frame_control);
124 int hdr_len = ieee80211_get_hdrlen(fc);
125
126 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
127 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
128 return NULL;
129 }
130
131 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
132 struct iwl_priv *priv, int mode)
133 {
134 int i;
135
136 for (i = 0; i < 3; i++)
137 if (priv->modes[i].mode == mode)
138 return &priv->modes[i];
139
140 return NULL;
141 }
142
143 static int iwl_is_empty_essid(const char *essid, int essid_len)
144 {
145 /* Single white space is for Linksys APs */
146 if (essid_len == 1 && essid[0] == ' ')
147 return 1;
148
149 /* Otherwise, if the entire essid is 0, we assume it is hidden */
150 while (essid_len) {
151 essid_len--;
152 if (essid[essid_len] != '\0')
153 return 0;
154 }
155
156 return 1;
157 }
158
159 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
160 {
161 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
162 const char *s = essid;
163 char *d = escaped;
164
165 if (iwl_is_empty_essid(essid, essid_len)) {
166 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
167 return escaped;
168 }
169
170 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
171 while (essid_len--) {
172 if (*s == '\0') {
173 *d++ = '\\';
174 *d++ = '0';
175 s++;
176 } else
177 *d++ = *s++;
178 }
179 *d = '\0';
180 return escaped;
181 }
182
183 static void iwl_print_hex_dump(int level, void *p, u32 len)
184 {
185 #ifdef CONFIG_IWLWIFI_DEBUG
186 if (!(iwl_debug_level & level))
187 return;
188
189 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
190 p, len, 1);
191 #endif
192 }
193
194 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
195 * DMA services
196 *
197 * Theory of operation
198 *
199 * A queue is a circular buffers with 'Read' and 'Write' pointers.
200 * 2 empty entries always kept in the buffer to protect from overflow.
201 *
202 * For Tx queue, there are low mark and high mark limits. If, after queuing
203 * the packet for Tx, free space become < low mark, Tx queue stopped. When
204 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
205 * Tx queue resumed.
206 *
207 * The IWL operates with six queues, one receive queue in the device's
208 * sram, one transmit queue for sending commands to the device firmware,
209 * and four transmit queues for data.
210 ***************************************************/
211
212 static int iwl_queue_space(const struct iwl_queue *q)
213 {
214 int s = q->read_ptr - q->write_ptr;
215
216 if (q->read_ptr > q->write_ptr)
217 s -= q->n_bd;
218
219 if (s <= 0)
220 s += q->n_window;
221 /* keep some reserve to not confuse empty and full situations */
222 s -= 2;
223 if (s < 0)
224 s = 0;
225 return s;
226 }
227
228 /* XXX: n_bd must be power-of-two size */
229 static inline int iwl_queue_inc_wrap(int index, int n_bd)
230 {
231 return ++index & (n_bd - 1);
232 }
233
234 /* XXX: n_bd must be power-of-two size */
235 static inline int iwl_queue_dec_wrap(int index, int n_bd)
236 {
237 return --index & (n_bd - 1);
238 }
239
240 static inline int x2_queue_used(const struct iwl_queue *q, int i)
241 {
242 return q->write_ptr > q->read_ptr ?
243 (i >= q->read_ptr && i < q->write_ptr) :
244 !(i < q->read_ptr && i >= q->write_ptr);
245 }
246
247 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
248 {
249 if (is_huge)
250 return q->n_window;
251
252 return index & (q->n_window - 1);
253 }
254
255 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
256 int count, int slots_num, u32 id)
257 {
258 q->n_bd = count;
259 q->n_window = slots_num;
260 q->id = id;
261
262 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
263 * and iwl_queue_dec_wrap are broken. */
264 BUG_ON(!is_power_of_2(count));
265
266 /* slots_num must be power-of-two size, otherwise
267 * get_cmd_index is broken. */
268 BUG_ON(!is_power_of_2(slots_num));
269
270 q->low_mark = q->n_window / 4;
271 if (q->low_mark < 4)
272 q->low_mark = 4;
273
274 q->high_mark = q->n_window / 8;
275 if (q->high_mark < 2)
276 q->high_mark = 2;
277
278 q->write_ptr = q->read_ptr = 0;
279
280 return 0;
281 }
282
283 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
284 struct iwl_tx_queue *txq, u32 id)
285 {
286 struct pci_dev *dev = priv->pci_dev;
287
288 if (id != IWL_CMD_QUEUE_NUM) {
289 txq->txb = kmalloc(sizeof(txq->txb[0]) *
290 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
291 if (!txq->txb) {
292 IWL_ERROR("kmalloc for auxiliary BD "
293 "structures failed\n");
294 goto error;
295 }
296 } else
297 txq->txb = NULL;
298
299 txq->bd = pci_alloc_consistent(dev,
300 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
301 &txq->q.dma_addr);
302
303 if (!txq->bd) {
304 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
305 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
306 goto error;
307 }
308 txq->q.id = id;
309
310 return 0;
311
312 error:
313 if (txq->txb) {
314 kfree(txq->txb);
315 txq->txb = NULL;
316 }
317
318 return -ENOMEM;
319 }
320
321 int iwl_tx_queue_init(struct iwl_priv *priv,
322 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
323 {
324 struct pci_dev *dev = priv->pci_dev;
325 int len;
326 int rc = 0;
327
328 /* allocate command space + one big command for scan since scan
329 * command is very huge the system will not have two scan at the
330 * same time */
331 len = sizeof(struct iwl_cmd) * slots_num;
332 if (txq_id == IWL_CMD_QUEUE_NUM)
333 len += IWL_MAX_SCAN_SIZE;
334 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
335 if (!txq->cmd)
336 return -ENOMEM;
337
338 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
339 if (rc) {
340 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
341
342 return -ENOMEM;
343 }
344 txq->need_update = 0;
345
346 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
347 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
348 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
349 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
350
351 iwl_hw_tx_queue_init(priv, txq);
352
353 return 0;
354 }
355
356 /**
357 * iwl_tx_queue_free - Deallocate DMA queue.
358 * @txq: Transmit queue to deallocate.
359 *
360 * Empty queue by removing and destroying all BD's.
361 * Free all buffers. txq itself is not freed.
362 *
363 */
364 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
365 {
366 struct iwl_queue *q = &txq->q;
367 struct pci_dev *dev = priv->pci_dev;
368 int len;
369
370 if (q->n_bd == 0)
371 return;
372
373 /* first, empty all BD's */
374 for (; q->write_ptr != q->read_ptr;
375 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
376 iwl_hw_txq_free_tfd(priv, txq);
377
378 len = sizeof(struct iwl_cmd) * q->n_window;
379 if (q->id == IWL_CMD_QUEUE_NUM)
380 len += IWL_MAX_SCAN_SIZE;
381
382 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
383
384 /* free buffers belonging to queue itself */
385 if (txq->q.n_bd)
386 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
387 txq->q.n_bd, txq->bd, txq->q.dma_addr);
388
389 if (txq->txb) {
390 kfree(txq->txb);
391 txq->txb = NULL;
392 }
393
394 /* 0 fill whole structure */
395 memset(txq, 0, sizeof(*txq));
396 }
397
398 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
399
400 /*************** STATION TABLE MANAGEMENT ****
401 *
402 * NOTE: This needs to be overhauled to better synchronize between
403 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
404 *
405 * mac80211 should also be examined to determine if sta_info is duplicating
406 * the functionality provided here
407 */
408
409 /**************************************************************/
410
411 #if 0 /* temporary disable till we add real remove station */
412 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
413 {
414 int index = IWL_INVALID_STATION;
415 int i;
416 unsigned long flags;
417
418 spin_lock_irqsave(&priv->sta_lock, flags);
419
420 if (is_ap)
421 index = IWL_AP_ID;
422 else if (is_broadcast_ether_addr(addr))
423 index = priv->hw_setting.bcast_sta_id;
424 else
425 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
426 if (priv->stations[i].used &&
427 !compare_ether_addr(priv->stations[i].sta.sta.addr,
428 addr)) {
429 index = i;
430 break;
431 }
432
433 if (unlikely(index == IWL_INVALID_STATION))
434 goto out;
435
436 if (priv->stations[index].used) {
437 priv->stations[index].used = 0;
438 priv->num_stations--;
439 }
440
441 BUG_ON(priv->num_stations < 0);
442
443 out:
444 spin_unlock_irqrestore(&priv->sta_lock, flags);
445 return 0;
446 }
447 #endif
448
449 static void iwl_clear_stations_table(struct iwl_priv *priv)
450 {
451 unsigned long flags;
452
453 spin_lock_irqsave(&priv->sta_lock, flags);
454
455 priv->num_stations = 0;
456 memset(priv->stations, 0, sizeof(priv->stations));
457
458 spin_unlock_irqrestore(&priv->sta_lock, flags);
459 }
460
461 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
462 {
463 int i;
464 int index = IWL_INVALID_STATION;
465 struct iwl_station_entry *station;
466 unsigned long flags_spin;
467 DECLARE_MAC_BUF(mac);
468
469 spin_lock_irqsave(&priv->sta_lock, flags_spin);
470 if (is_ap)
471 index = IWL_AP_ID;
472 else if (is_broadcast_ether_addr(addr))
473 index = priv->hw_setting.bcast_sta_id;
474 else
475 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
476 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
477 addr)) {
478 index = i;
479 break;
480 }
481
482 if (!priv->stations[i].used &&
483 index == IWL_INVALID_STATION)
484 index = i;
485 }
486
487
488 /* These two conditions has the same outcome but keep them separate
489 since they have different meaning */
490 if (unlikely(index == IWL_INVALID_STATION)) {
491 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
492 return index;
493 }
494
495 if (priv->stations[index].used &&
496 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
497 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
498 return index;
499 }
500
501
502 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
503 station = &priv->stations[index];
504 station->used = 1;
505 priv->num_stations++;
506
507 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
508 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
509 station->sta.mode = 0;
510 station->sta.sta.sta_id = index;
511 station->sta.station_flags = 0;
512
513 #ifdef CONFIG_IWLWIFI_HT
514 /* BCAST station and IBSS stations do not work in HT mode */
515 if (index != priv->hw_setting.bcast_sta_id &&
516 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
517 iwl4965_set_ht_add_station(priv, index);
518 #endif /*CONFIG_IWLWIFI_HT*/
519
520 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
521 iwl_send_add_station(priv, &station->sta, flags);
522 return index;
523
524 }
525
526 /*************** DRIVER STATUS FUNCTIONS *****/
527
528 static inline int iwl_is_ready(struct iwl_priv *priv)
529 {
530 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
531 * set but EXIT_PENDING is not */
532 return test_bit(STATUS_READY, &priv->status) &&
533 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
534 !test_bit(STATUS_EXIT_PENDING, &priv->status);
535 }
536
537 static inline int iwl_is_alive(struct iwl_priv *priv)
538 {
539 return test_bit(STATUS_ALIVE, &priv->status);
540 }
541
542 static inline int iwl_is_init(struct iwl_priv *priv)
543 {
544 return test_bit(STATUS_INIT, &priv->status);
545 }
546
547 static inline int iwl_is_rfkill(struct iwl_priv *priv)
548 {
549 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
550 test_bit(STATUS_RF_KILL_SW, &priv->status);
551 }
552
553 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
554 {
555
556 if (iwl_is_rfkill(priv))
557 return 0;
558
559 return iwl_is_ready(priv);
560 }
561
562 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
563
564 #define IWL_CMD(x) case x : return #x
565
566 static const char *get_cmd_string(u8 cmd)
567 {
568 switch (cmd) {
569 IWL_CMD(REPLY_ALIVE);
570 IWL_CMD(REPLY_ERROR);
571 IWL_CMD(REPLY_RXON);
572 IWL_CMD(REPLY_RXON_ASSOC);
573 IWL_CMD(REPLY_QOS_PARAM);
574 IWL_CMD(REPLY_RXON_TIMING);
575 IWL_CMD(REPLY_ADD_STA);
576 IWL_CMD(REPLY_REMOVE_STA);
577 IWL_CMD(REPLY_REMOVE_ALL_STA);
578 IWL_CMD(REPLY_TX);
579 IWL_CMD(REPLY_RATE_SCALE);
580 IWL_CMD(REPLY_LEDS_CMD);
581 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
582 IWL_CMD(RADAR_NOTIFICATION);
583 IWL_CMD(REPLY_QUIET_CMD);
584 IWL_CMD(REPLY_CHANNEL_SWITCH);
585 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
586 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
587 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
588 IWL_CMD(POWER_TABLE_CMD);
589 IWL_CMD(PM_SLEEP_NOTIFICATION);
590 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
591 IWL_CMD(REPLY_SCAN_CMD);
592 IWL_CMD(REPLY_SCAN_ABORT_CMD);
593 IWL_CMD(SCAN_START_NOTIFICATION);
594 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
595 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
596 IWL_CMD(BEACON_NOTIFICATION);
597 IWL_CMD(REPLY_TX_BEACON);
598 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
599 IWL_CMD(QUIET_NOTIFICATION);
600 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
601 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
602 IWL_CMD(REPLY_BT_CONFIG);
603 IWL_CMD(REPLY_STATISTICS_CMD);
604 IWL_CMD(STATISTICS_NOTIFICATION);
605 IWL_CMD(REPLY_CARD_STATE_CMD);
606 IWL_CMD(CARD_STATE_NOTIFICATION);
607 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
608 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
609 IWL_CMD(SENSITIVITY_CMD);
610 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
611 IWL_CMD(REPLY_RX_PHY_CMD);
612 IWL_CMD(REPLY_RX_MPDU_CMD);
613 IWL_CMD(REPLY_4965_RX);
614 IWL_CMD(REPLY_COMPRESSED_BA);
615 default:
616 return "UNKNOWN";
617
618 }
619 }
620
621 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
622
623 /**
624 * iwl_enqueue_hcmd - enqueue a uCode command
625 * @priv: device private data point
626 * @cmd: a point to the ucode command structure
627 *
628 * The function returns < 0 values to indicate the operation is
629 * failed. On success, it turns the index (> 0) of command in the
630 * command queue.
631 */
632 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
633 {
634 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
635 struct iwl_queue *q = &txq->q;
636 struct iwl_tfd_frame *tfd;
637 u32 *control_flags;
638 struct iwl_cmd *out_cmd;
639 u32 idx;
640 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
641 dma_addr_t phys_addr;
642 int ret;
643 unsigned long flags;
644
645 /* If any of the command structures end up being larger than
646 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
647 * we will need to increase the size of the TFD entries */
648 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
649 !(cmd->meta.flags & CMD_SIZE_HUGE));
650
651 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
652 IWL_ERROR("No space for Tx\n");
653 return -ENOSPC;
654 }
655
656 spin_lock_irqsave(&priv->hcmd_lock, flags);
657
658 tfd = &txq->bd[q->write_ptr];
659 memset(tfd, 0, sizeof(*tfd));
660
661 control_flags = (u32 *) tfd;
662
663 idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
664 out_cmd = &txq->cmd[idx];
665
666 out_cmd->hdr.cmd = cmd->id;
667 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
668 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
669
670 /* At this point, the out_cmd now has all of the incoming cmd
671 * information */
672
673 out_cmd->hdr.flags = 0;
674 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
675 INDEX_TO_SEQ(q->write_ptr));
676 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
677 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
678
679 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
680 offsetof(struct iwl_cmd, hdr);
681 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
682
683 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
684 "%d bytes at %d[%d]:%d\n",
685 get_cmd_string(out_cmd->hdr.cmd),
686 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
687 fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
688
689 txq->need_update = 1;
690 ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
691 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
692 iwl_tx_queue_update_write_ptr(priv, txq);
693
694 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
695 return ret ? ret : idx;
696 }
697
698 static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
699 {
700 int ret;
701
702 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
703
704 /* An asynchronous command can not expect an SKB to be set. */
705 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
706
707 /* An asynchronous command MUST have a callback. */
708 BUG_ON(!cmd->meta.u.callback);
709
710 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
711 return -EBUSY;
712
713 ret = iwl_enqueue_hcmd(priv, cmd);
714 if (ret < 0) {
715 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
716 get_cmd_string(cmd->id), ret);
717 return ret;
718 }
719 return 0;
720 }
721
722 static int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
723 {
724 int cmd_idx;
725 int ret;
726 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
727
728 BUG_ON(cmd->meta.flags & CMD_ASYNC);
729
730 /* A synchronous command can not have a callback set. */
731 BUG_ON(cmd->meta.u.callback != NULL);
732
733 if (atomic_xchg(&entry, 1)) {
734 IWL_ERROR("Error sending %s: Already sending a host command\n",
735 get_cmd_string(cmd->id));
736 return -EBUSY;
737 }
738
739 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
740
741 if (cmd->meta.flags & CMD_WANT_SKB)
742 cmd->meta.source = &cmd->meta;
743
744 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
745 if (cmd_idx < 0) {
746 ret = cmd_idx;
747 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
748 get_cmd_string(cmd->id), ret);
749 goto out;
750 }
751
752 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
753 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
754 HOST_COMPLETE_TIMEOUT);
755 if (!ret) {
756 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
757 IWL_ERROR("Error sending %s: time out after %dms.\n",
758 get_cmd_string(cmd->id),
759 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
760
761 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
762 ret = -ETIMEDOUT;
763 goto cancel;
764 }
765 }
766
767 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
768 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
769 get_cmd_string(cmd->id));
770 ret = -ECANCELED;
771 goto fail;
772 }
773 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
774 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
775 get_cmd_string(cmd->id));
776 ret = -EIO;
777 goto fail;
778 }
779 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
780 IWL_ERROR("Error: Response NULL in '%s'\n",
781 get_cmd_string(cmd->id));
782 ret = -EIO;
783 goto out;
784 }
785
786 ret = 0;
787 goto out;
788
789 cancel:
790 if (cmd->meta.flags & CMD_WANT_SKB) {
791 struct iwl_cmd *qcmd;
792
793 /* Cancel the CMD_WANT_SKB flag for the cmd in the
794 * TX cmd queue. Otherwise in case the cmd comes
795 * in later, it will possibly set an invalid
796 * address (cmd->meta.source). */
797 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
798 qcmd->meta.flags &= ~CMD_WANT_SKB;
799 }
800 fail:
801 if (cmd->meta.u.skb) {
802 dev_kfree_skb_any(cmd->meta.u.skb);
803 cmd->meta.u.skb = NULL;
804 }
805 out:
806 atomic_set(&entry, 0);
807 return ret;
808 }
809
810 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
811 {
812 if (cmd->meta.flags & CMD_ASYNC)
813 return iwl_send_cmd_async(priv, cmd);
814
815 return iwl_send_cmd_sync(priv, cmd);
816 }
817
818 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
819 {
820 struct iwl_host_cmd cmd = {
821 .id = id,
822 .len = len,
823 .data = data,
824 };
825
826 return iwl_send_cmd_sync(priv, &cmd);
827 }
828
829 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
830 {
831 struct iwl_host_cmd cmd = {
832 .id = id,
833 .len = sizeof(val),
834 .data = &val,
835 };
836
837 return iwl_send_cmd_sync(priv, &cmd);
838 }
839
840 int iwl_send_statistics_request(struct iwl_priv *priv)
841 {
842 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
843 }
844
845 /**
846 * iwl_rxon_add_station - add station into station table.
847 *
848 * there is only one AP station with id= IWL_AP_ID
849 * NOTE: mutex must be held before calling the this fnction
850 */
851 static int iwl_rxon_add_station(struct iwl_priv *priv,
852 const u8 *addr, int is_ap)
853 {
854 u8 sta_id;
855
856 sta_id = iwl_add_station(priv, addr, is_ap, 0);
857 iwl4965_add_station(priv, addr, is_ap);
858
859 return sta_id;
860 }
861
862 /**
863 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
864 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
865 * @channel: Any channel valid for the requested phymode
866
867 * In addition to setting the staging RXON, priv->phymode is also set.
868 *
869 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
870 * in the staging RXON flag structure based on the phymode
871 */
872 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
873 {
874 if (!iwl_get_channel_info(priv, phymode, channel)) {
875 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
876 channel, phymode);
877 return -EINVAL;
878 }
879
880 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
881 (priv->phymode == phymode))
882 return 0;
883
884 priv->staging_rxon.channel = cpu_to_le16(channel);
885 if (phymode == MODE_IEEE80211A)
886 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
887 else
888 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
889
890 priv->phymode = phymode;
891
892 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
893
894 return 0;
895 }
896
897 /**
898 * iwl_check_rxon_cmd - validate RXON structure is valid
899 *
900 * NOTE: This is really only useful during development and can eventually
901 * be #ifdef'd out once the driver is stable and folks aren't actively
902 * making changes
903 */
904 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
905 {
906 int error = 0;
907 int counter = 1;
908
909 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
910 error |= le32_to_cpu(rxon->flags &
911 (RXON_FLG_TGJ_NARROW_BAND_MSK |
912 RXON_FLG_RADAR_DETECT_MSK));
913 if (error)
914 IWL_WARNING("check 24G fields %d | %d\n",
915 counter++, error);
916 } else {
917 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
918 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
919 if (error)
920 IWL_WARNING("check 52 fields %d | %d\n",
921 counter++, error);
922 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
923 if (error)
924 IWL_WARNING("check 52 CCK %d | %d\n",
925 counter++, error);
926 }
927 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
928 if (error)
929 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
930
931 /* make sure basic rates 6Mbps and 1Mbps are supported */
932 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
933 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
934 if (error)
935 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
936
937 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
938 if (error)
939 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
940
941 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
942 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
943 if (error)
944 IWL_WARNING("check CCK and short slot %d | %d\n",
945 counter++, error);
946
947 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
948 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
949 if (error)
950 IWL_WARNING("check CCK & auto detect %d | %d\n",
951 counter++, error);
952
953 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
954 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
955 if (error)
956 IWL_WARNING("check TGG and auto detect %d | %d\n",
957 counter++, error);
958
959 if (error)
960 IWL_WARNING("Tuning to channel %d\n",
961 le16_to_cpu(rxon->channel));
962
963 if (error) {
964 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
965 return -1;
966 }
967 return 0;
968 }
969
970 /**
971 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
972 * @priv: staging_rxon is compared to active_rxon
973 *
974 * If the RXON structure is changing sufficient to require a new
975 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
976 * to indicate a new tune is required.
977 */
978 static int iwl_full_rxon_required(struct iwl_priv *priv)
979 {
980
981 /* These items are only settable from the full RXON command */
982 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
983 compare_ether_addr(priv->staging_rxon.bssid_addr,
984 priv->active_rxon.bssid_addr) ||
985 compare_ether_addr(priv->staging_rxon.node_addr,
986 priv->active_rxon.node_addr) ||
987 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
988 priv->active_rxon.wlap_bssid_addr) ||
989 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
990 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
991 (priv->staging_rxon.air_propagation !=
992 priv->active_rxon.air_propagation) ||
993 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
994 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
995 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
996 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
997 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
998 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
999 return 1;
1000
1001 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1002 * be updated with the RXON_ASSOC command -- however only some
1003 * flag transitions are allowed using RXON_ASSOC */
1004
1005 /* Check if we are not switching bands */
1006 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1007 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1008 return 1;
1009
1010 /* Check if we are switching association toggle */
1011 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1012 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1013 return 1;
1014
1015 return 0;
1016 }
1017
1018 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1019 {
1020 int rc = 0;
1021 struct iwl_rx_packet *res = NULL;
1022 struct iwl_rxon_assoc_cmd rxon_assoc;
1023 struct iwl_host_cmd cmd = {
1024 .id = REPLY_RXON_ASSOC,
1025 .len = sizeof(rxon_assoc),
1026 .meta.flags = CMD_WANT_SKB,
1027 .data = &rxon_assoc,
1028 };
1029 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1030 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1031
1032 if ((rxon1->flags == rxon2->flags) &&
1033 (rxon1->filter_flags == rxon2->filter_flags) &&
1034 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1035 (rxon1->ofdm_ht_single_stream_basic_rates ==
1036 rxon2->ofdm_ht_single_stream_basic_rates) &&
1037 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1038 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1039 (rxon1->rx_chain == rxon2->rx_chain) &&
1040 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1041 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1042 return 0;
1043 }
1044
1045 rxon_assoc.flags = priv->staging_rxon.flags;
1046 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1047 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1048 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1049 rxon_assoc.reserved = 0;
1050 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1051 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1052 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1053 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1054 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1055
1056 rc = iwl_send_cmd_sync(priv, &cmd);
1057 if (rc)
1058 return rc;
1059
1060 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1061 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1062 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1063 rc = -EIO;
1064 }
1065
1066 priv->alloc_rxb_skb--;
1067 dev_kfree_skb_any(cmd.meta.u.skb);
1068
1069 return rc;
1070 }
1071
1072 /**
1073 * iwl_commit_rxon - commit staging_rxon to hardware
1074 *
1075 * The RXON command in staging_rxon is committed to the hardware and
1076 * the active_rxon structure is updated with the new data. This
1077 * function correctly transitions out of the RXON_ASSOC_MSK state if
1078 * a HW tune is required based on the RXON structure changes.
1079 */
1080 static int iwl_commit_rxon(struct iwl_priv *priv)
1081 {
1082 /* cast away the const for active_rxon in this function */
1083 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1084 DECLARE_MAC_BUF(mac);
1085 int rc = 0;
1086
1087 if (!iwl_is_alive(priv))
1088 return -1;
1089
1090 /* always get timestamp with Rx frame */
1091 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1092
1093 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1094 if (rc) {
1095 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1096 return -EINVAL;
1097 }
1098
1099 /* If we don't need to send a full RXON, we can use
1100 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1101 * and other flags for the current radio configuration. */
1102 if (!iwl_full_rxon_required(priv)) {
1103 rc = iwl_send_rxon_assoc(priv);
1104 if (rc) {
1105 IWL_ERROR("Error setting RXON_ASSOC "
1106 "configuration (%d).\n", rc);
1107 return rc;
1108 }
1109
1110 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1111
1112 return 0;
1113 }
1114
1115 /* station table will be cleared */
1116 priv->assoc_station_added = 0;
1117
1118 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1119 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1120 if (!priv->error_recovering)
1121 priv->start_calib = 0;
1122
1123 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1124 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1125
1126 /* If we are currently associated and the new config requires
1127 * an RXON_ASSOC and the new config wants the associated mask enabled,
1128 * we must clear the associated from the active configuration
1129 * before we apply the new config */
1130 if (iwl_is_associated(priv) &&
1131 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1132 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1133 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1134
1135 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1136 sizeof(struct iwl_rxon_cmd),
1137 &priv->active_rxon);
1138
1139 /* If the mask clearing failed then we set
1140 * active_rxon back to what it was previously */
1141 if (rc) {
1142 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1143 IWL_ERROR("Error clearing ASSOC_MSK on current "
1144 "configuration (%d).\n", rc);
1145 return rc;
1146 }
1147 }
1148
1149 IWL_DEBUG_INFO("Sending RXON\n"
1150 "* with%s RXON_FILTER_ASSOC_MSK\n"
1151 "* channel = %d\n"
1152 "* bssid = %s\n",
1153 ((priv->staging_rxon.filter_flags &
1154 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1155 le16_to_cpu(priv->staging_rxon.channel),
1156 print_mac(mac, priv->staging_rxon.bssid_addr));
1157
1158 /* Apply the new configuration */
1159 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1160 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1161 if (rc) {
1162 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1163 return rc;
1164 }
1165
1166 iwl_clear_stations_table(priv);
1167
1168 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1169 if (!priv->error_recovering)
1170 priv->start_calib = 0;
1171
1172 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1173 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1174 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1175
1176 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1177
1178 /* If we issue a new RXON command which required a tune then we must
1179 * send a new TXPOWER command or we won't be able to Tx any frames */
1180 rc = iwl_hw_reg_send_txpower(priv);
1181 if (rc) {
1182 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1183 return rc;
1184 }
1185
1186 /* Add the broadcast address so we can send broadcast frames */
1187 if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1188 IWL_INVALID_STATION) {
1189 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1190 return -EIO;
1191 }
1192
1193 /* If we have set the ASSOC_MSK and we are in BSS mode then
1194 * add the IWL_AP_ID to the station rate table */
1195 if (iwl_is_associated(priv) &&
1196 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1197 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1198 == IWL_INVALID_STATION) {
1199 IWL_ERROR("Error adding AP address for transmit.\n");
1200 return -EIO;
1201 }
1202 priv->assoc_station_added = 1;
1203 }
1204
1205 return 0;
1206 }
1207
1208 static int iwl_send_bt_config(struct iwl_priv *priv)
1209 {
1210 struct iwl_bt_cmd bt_cmd = {
1211 .flags = 3,
1212 .lead_time = 0xAA,
1213 .max_kill = 1,
1214 .kill_ack_mask = 0,
1215 .kill_cts_mask = 0,
1216 };
1217
1218 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1219 sizeof(struct iwl_bt_cmd), &bt_cmd);
1220 }
1221
1222 static int iwl_send_scan_abort(struct iwl_priv *priv)
1223 {
1224 int rc = 0;
1225 struct iwl_rx_packet *res;
1226 struct iwl_host_cmd cmd = {
1227 .id = REPLY_SCAN_ABORT_CMD,
1228 .meta.flags = CMD_WANT_SKB,
1229 };
1230
1231 /* If there isn't a scan actively going on in the hardware
1232 * then we are in between scan bands and not actually
1233 * actively scanning, so don't send the abort command */
1234 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1235 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1236 return 0;
1237 }
1238
1239 rc = iwl_send_cmd_sync(priv, &cmd);
1240 if (rc) {
1241 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1242 return rc;
1243 }
1244
1245 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1246 if (res->u.status != CAN_ABORT_STATUS) {
1247 /* The scan abort will return 1 for success or
1248 * 2 for "failure". A failure condition can be
1249 * due to simply not being in an active scan which
1250 * can occur if we send the scan abort before we
1251 * the microcode has notified us that a scan is
1252 * completed. */
1253 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1254 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1255 clear_bit(STATUS_SCAN_HW, &priv->status);
1256 }
1257
1258 dev_kfree_skb_any(cmd.meta.u.skb);
1259
1260 return rc;
1261 }
1262
1263 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1264 struct iwl_cmd *cmd,
1265 struct sk_buff *skb)
1266 {
1267 return 1;
1268 }
1269
1270 /*
1271 * CARD_STATE_CMD
1272 *
1273 * Use: Sets the internal card state to enable, disable, or halt
1274 *
1275 * When in the 'enable' state the card operates as normal.
1276 * When in the 'disable' state, the card enters into a low power mode.
1277 * When in the 'halt' state, the card is shut down and must be fully
1278 * restarted to come back on.
1279 */
1280 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1281 {
1282 struct iwl_host_cmd cmd = {
1283 .id = REPLY_CARD_STATE_CMD,
1284 .len = sizeof(u32),
1285 .data = &flags,
1286 .meta.flags = meta_flag,
1287 };
1288
1289 if (meta_flag & CMD_ASYNC)
1290 cmd.meta.u.callback = iwl_card_state_sync_callback;
1291
1292 return iwl_send_cmd(priv, &cmd);
1293 }
1294
1295 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1296 struct iwl_cmd *cmd, struct sk_buff *skb)
1297 {
1298 struct iwl_rx_packet *res = NULL;
1299
1300 if (!skb) {
1301 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1302 return 1;
1303 }
1304
1305 res = (struct iwl_rx_packet *)skb->data;
1306 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1307 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1308 res->hdr.flags);
1309 return 1;
1310 }
1311
1312 switch (res->u.add_sta.status) {
1313 case ADD_STA_SUCCESS_MSK:
1314 break;
1315 default:
1316 break;
1317 }
1318
1319 /* We didn't cache the SKB; let the caller free it */
1320 return 1;
1321 }
1322
1323 int iwl_send_add_station(struct iwl_priv *priv,
1324 struct iwl_addsta_cmd *sta, u8 flags)
1325 {
1326 struct iwl_rx_packet *res = NULL;
1327 int rc = 0;
1328 struct iwl_host_cmd cmd = {
1329 .id = REPLY_ADD_STA,
1330 .len = sizeof(struct iwl_addsta_cmd),
1331 .meta.flags = flags,
1332 .data = sta,
1333 };
1334
1335 if (flags & CMD_ASYNC)
1336 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1337 else
1338 cmd.meta.flags |= CMD_WANT_SKB;
1339
1340 rc = iwl_send_cmd(priv, &cmd);
1341
1342 if (rc || (flags & CMD_ASYNC))
1343 return rc;
1344
1345 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1346 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1347 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1348 res->hdr.flags);
1349 rc = -EIO;
1350 }
1351
1352 if (rc == 0) {
1353 switch (res->u.add_sta.status) {
1354 case ADD_STA_SUCCESS_MSK:
1355 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1356 break;
1357 default:
1358 rc = -EIO;
1359 IWL_WARNING("REPLY_ADD_STA failed\n");
1360 break;
1361 }
1362 }
1363
1364 priv->alloc_rxb_skb--;
1365 dev_kfree_skb_any(cmd.meta.u.skb);
1366
1367 return rc;
1368 }
1369
1370 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1371 struct ieee80211_key_conf *keyconf,
1372 u8 sta_id)
1373 {
1374 unsigned long flags;
1375 __le16 key_flags = 0;
1376
1377 switch (keyconf->alg) {
1378 case ALG_CCMP:
1379 key_flags |= STA_KEY_FLG_CCMP;
1380 key_flags |= cpu_to_le16(
1381 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1382 key_flags &= ~STA_KEY_FLG_INVALID;
1383 break;
1384 case ALG_TKIP:
1385 case ALG_WEP:
1386 default:
1387 return -EINVAL;
1388 }
1389 spin_lock_irqsave(&priv->sta_lock, flags);
1390 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1391 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1392 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1393 keyconf->keylen);
1394
1395 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1396 keyconf->keylen);
1397 priv->stations[sta_id].sta.key.key_flags = key_flags;
1398 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1399 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1400
1401 spin_unlock_irqrestore(&priv->sta_lock, flags);
1402
1403 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1404 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1405 return 0;
1406 }
1407
1408 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1409 {
1410 unsigned long flags;
1411
1412 spin_lock_irqsave(&priv->sta_lock, flags);
1413 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1414 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1415 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1416 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1417 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1418 spin_unlock_irqrestore(&priv->sta_lock, flags);
1419
1420 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1421 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1422 return 0;
1423 }
1424
1425 static void iwl_clear_free_frames(struct iwl_priv *priv)
1426 {
1427 struct list_head *element;
1428
1429 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1430 priv->frames_count);
1431
1432 while (!list_empty(&priv->free_frames)) {
1433 element = priv->free_frames.next;
1434 list_del(element);
1435 kfree(list_entry(element, struct iwl_frame, list));
1436 priv->frames_count--;
1437 }
1438
1439 if (priv->frames_count) {
1440 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1441 priv->frames_count);
1442 priv->frames_count = 0;
1443 }
1444 }
1445
1446 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1447 {
1448 struct iwl_frame *frame;
1449 struct list_head *element;
1450 if (list_empty(&priv->free_frames)) {
1451 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1452 if (!frame) {
1453 IWL_ERROR("Could not allocate frame!\n");
1454 return NULL;
1455 }
1456
1457 priv->frames_count++;
1458 return frame;
1459 }
1460
1461 element = priv->free_frames.next;
1462 list_del(element);
1463 return list_entry(element, struct iwl_frame, list);
1464 }
1465
1466 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1467 {
1468 memset(frame, 0, sizeof(*frame));
1469 list_add(&frame->list, &priv->free_frames);
1470 }
1471
1472 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1473 struct ieee80211_hdr *hdr,
1474 const u8 *dest, int left)
1475 {
1476
1477 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1478 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1479 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1480 return 0;
1481
1482 if (priv->ibss_beacon->len > left)
1483 return 0;
1484
1485 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1486
1487 return priv->ibss_beacon->len;
1488 }
1489
1490 int iwl_rate_index_from_plcp(int plcp)
1491 {
1492 int i = 0;
1493
1494 if (plcp & RATE_MCS_HT_MSK) {
1495 i = (plcp & 0xff);
1496
1497 if (i >= IWL_RATE_MIMO_6M_PLCP)
1498 i = i - IWL_RATE_MIMO_6M_PLCP;
1499
1500 i += IWL_FIRST_OFDM_RATE;
1501 /* skip 9M not supported in ht*/
1502 if (i >= IWL_RATE_9M_INDEX)
1503 i += 1;
1504 if ((i >= IWL_FIRST_OFDM_RATE) &&
1505 (i <= IWL_LAST_OFDM_RATE))
1506 return i;
1507 } else {
1508 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1509 if (iwl_rates[i].plcp == (plcp &0xFF))
1510 return i;
1511 }
1512 return -1;
1513 }
1514
1515 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1516 {
1517 u8 i;
1518
1519 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1520 i = iwl_rates[i].next_ieee) {
1521 if (rate_mask & (1 << i))
1522 return iwl_rates[i].plcp;
1523 }
1524
1525 return IWL_RATE_INVALID;
1526 }
1527
1528 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1529 {
1530 struct iwl_frame *frame;
1531 unsigned int frame_size;
1532 int rc;
1533 u8 rate;
1534
1535 frame = iwl_get_free_frame(priv);
1536
1537 if (!frame) {
1538 IWL_ERROR("Could not obtain free frame buffer for beacon "
1539 "command.\n");
1540 return -ENOMEM;
1541 }
1542
1543 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1544 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1545 0xFF0);
1546 if (rate == IWL_INVALID_RATE)
1547 rate = IWL_RATE_6M_PLCP;
1548 } else {
1549 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1550 if (rate == IWL_INVALID_RATE)
1551 rate = IWL_RATE_1M_PLCP;
1552 }
1553
1554 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1555
1556 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1557 &frame->u.cmd[0]);
1558
1559 iwl_free_frame(priv, frame);
1560
1561 return rc;
1562 }
1563
1564 /******************************************************************************
1565 *
1566 * EEPROM related functions
1567 *
1568 ******************************************************************************/
1569
1570 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1571 {
1572 memcpy(mac, priv->eeprom.mac_address, 6);
1573 }
1574
1575 /**
1576 * iwl_eeprom_init - read EEPROM contents
1577 *
1578 * Load the EEPROM from adapter into priv->eeprom
1579 *
1580 * NOTE: This routine uses the non-debug IO access functions.
1581 */
1582 int iwl_eeprom_init(struct iwl_priv *priv)
1583 {
1584 u16 *e = (u16 *)&priv->eeprom;
1585 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1586 u32 r;
1587 int sz = sizeof(priv->eeprom);
1588 int rc;
1589 int i;
1590 u16 addr;
1591
1592 /* The EEPROM structure has several padding buffers within it
1593 * and when adding new EEPROM maps is subject to programmer errors
1594 * which may be very difficult to identify without explicitly
1595 * checking the resulting size of the eeprom map. */
1596 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1597
1598 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1599 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1600 return -ENOENT;
1601 }
1602
1603 rc = iwl_eeprom_acquire_semaphore(priv);
1604 if (rc < 0) {
1605 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1606 return -ENOENT;
1607 }
1608
1609 /* eeprom is an array of 16bit values */
1610 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1611 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1612 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1613
1614 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1615 i += IWL_EEPROM_ACCESS_DELAY) {
1616 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
1617 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1618 break;
1619 udelay(IWL_EEPROM_ACCESS_DELAY);
1620 }
1621
1622 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1623 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1624 rc = -ETIMEDOUT;
1625 goto done;
1626 }
1627 e[addr / 2] = le16_to_cpu(r >> 16);
1628 }
1629 rc = 0;
1630
1631 done:
1632 iwl_eeprom_release_semaphore(priv);
1633 return rc;
1634 }
1635
1636 /******************************************************************************
1637 *
1638 * Misc. internal state and helper functions
1639 *
1640 ******************************************************************************/
1641 #ifdef CONFIG_IWLWIFI_DEBUG
1642
1643 /**
1644 * iwl_report_frame - dump frame to syslog during debug sessions
1645 *
1646 * hack this function to show different aspects of received frames,
1647 * including selective frame dumps.
1648 * group100 parameter selects whether to show 1 out of 100 good frames.
1649 *
1650 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1651 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1652 * is 3945-specific and gives bad output for 4965. Need to split the
1653 * functionality, keep common stuff here.
1654 */
1655 void iwl_report_frame(struct iwl_priv *priv,
1656 struct iwl_rx_packet *pkt,
1657 struct ieee80211_hdr *header, int group100)
1658 {
1659 u32 to_us;
1660 u32 print_summary = 0;
1661 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1662 u32 hundred = 0;
1663 u32 dataframe = 0;
1664 u16 fc;
1665 u16 seq_ctl;
1666 u16 channel;
1667 u16 phy_flags;
1668 int rate_sym;
1669 u16 length;
1670 u16 status;
1671 u16 bcn_tmr;
1672 u32 tsf_low;
1673 u64 tsf;
1674 u8 rssi;
1675 u8 agc;
1676 u16 sig_avg;
1677 u16 noise_diff;
1678 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1679 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1680 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1681 u8 *data = IWL_RX_DATA(pkt);
1682
1683 /* MAC header */
1684 fc = le16_to_cpu(header->frame_control);
1685 seq_ctl = le16_to_cpu(header->seq_ctrl);
1686
1687 /* metadata */
1688 channel = le16_to_cpu(rx_hdr->channel);
1689 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1690 rate_sym = rx_hdr->rate;
1691 length = le16_to_cpu(rx_hdr->len);
1692
1693 /* end-of-frame status and timestamp */
1694 status = le32_to_cpu(rx_end->status);
1695 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1696 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1697 tsf = le64_to_cpu(rx_end->timestamp);
1698
1699 /* signal statistics */
1700 rssi = rx_stats->rssi;
1701 agc = rx_stats->agc;
1702 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1703 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1704
1705 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1706
1707 /* if data frame is to us and all is good,
1708 * (optionally) print summary for only 1 out of every 100 */
1709 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1710 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1711 dataframe = 1;
1712 if (!group100)
1713 print_summary = 1; /* print each frame */
1714 else if (priv->framecnt_to_us < 100) {
1715 priv->framecnt_to_us++;
1716 print_summary = 0;
1717 } else {
1718 priv->framecnt_to_us = 0;
1719 print_summary = 1;
1720 hundred = 1;
1721 }
1722 } else {
1723 /* print summary for all other frames */
1724 print_summary = 1;
1725 }
1726
1727 if (print_summary) {
1728 char *title;
1729 u32 rate;
1730
1731 if (hundred)
1732 title = "100Frames";
1733 else if (fc & IEEE80211_FCTL_RETRY)
1734 title = "Retry";
1735 else if (ieee80211_is_assoc_response(fc))
1736 title = "AscRsp";
1737 else if (ieee80211_is_reassoc_response(fc))
1738 title = "RasRsp";
1739 else if (ieee80211_is_probe_response(fc)) {
1740 title = "PrbRsp";
1741 print_dump = 1; /* dump frame contents */
1742 } else if (ieee80211_is_beacon(fc)) {
1743 title = "Beacon";
1744 print_dump = 1; /* dump frame contents */
1745 } else if (ieee80211_is_atim(fc))
1746 title = "ATIM";
1747 else if (ieee80211_is_auth(fc))
1748 title = "Auth";
1749 else if (ieee80211_is_deauth(fc))
1750 title = "DeAuth";
1751 else if (ieee80211_is_disassoc(fc))
1752 title = "DisAssoc";
1753 else
1754 title = "Frame";
1755
1756 rate = iwl_rate_index_from_plcp(rate_sym);
1757 if (rate == -1)
1758 rate = 0;
1759 else
1760 rate = iwl_rates[rate].ieee / 2;
1761
1762 /* print frame summary.
1763 * MAC addresses show just the last byte (for brevity),
1764 * but you can hack it to show more, if you'd like to. */
1765 if (dataframe)
1766 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1767 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1768 title, fc, header->addr1[5],
1769 length, rssi, channel, rate);
1770 else {
1771 /* src/dst addresses assume managed mode */
1772 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1773 "src=0x%02x, rssi=%u, tim=%lu usec, "
1774 "phy=0x%02x, chnl=%d\n",
1775 title, fc, header->addr1[5],
1776 header->addr3[5], rssi,
1777 tsf_low - priv->scan_start_tsf,
1778 phy_flags, channel);
1779 }
1780 }
1781 if (print_dump)
1782 iwl_print_hex_dump(IWL_DL_RX, data, length);
1783 }
1784 #endif
1785
1786 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1787 {
1788 if (priv->hw_setting.shared_virt)
1789 pci_free_consistent(priv->pci_dev,
1790 sizeof(struct iwl_shared),
1791 priv->hw_setting.shared_virt,
1792 priv->hw_setting.shared_phys);
1793 }
1794
1795 /**
1796 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1797 *
1798 * return : set the bit for each supported rate insert in ie
1799 */
1800 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1801 u16 basic_rate, int *left)
1802 {
1803 u16 ret_rates = 0, bit;
1804 int i;
1805 u8 *cnt = ie;
1806 u8 *rates = ie + 1;
1807
1808 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1809 if (bit & supported_rate) {
1810 ret_rates |= bit;
1811 rates[*cnt] = iwl_rates[i].ieee |
1812 ((bit & basic_rate) ? 0x80 : 0x00);
1813 (*cnt)++;
1814 (*left)--;
1815 if ((*left <= 0) ||
1816 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1817 break;
1818 }
1819 }
1820
1821 return ret_rates;
1822 }
1823
1824 #ifdef CONFIG_IWLWIFI_HT
1825 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1826 struct ieee80211_ht_capability *ht_cap,
1827 u8 use_wide_chan);
1828 #endif
1829
1830 /**
1831 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1832 */
1833 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1834 struct ieee80211_mgmt *frame,
1835 int left, int is_direct)
1836 {
1837 int len = 0;
1838 u8 *pos = NULL;
1839 u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1840
1841 /* Make sure there is enough space for the probe request,
1842 * two mandatory IEs and the data */
1843 left -= 24;
1844 if (left < 0)
1845 return 0;
1846 len += 24;
1847
1848 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1849 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1850 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1851 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1852 frame->seq_ctrl = 0;
1853
1854 /* fill in our indirect SSID IE */
1855 /* ...next IE... */
1856
1857 left -= 2;
1858 if (left < 0)
1859 return 0;
1860 len += 2;
1861 pos = &(frame->u.probe_req.variable[0]);
1862 *pos++ = WLAN_EID_SSID;
1863 *pos++ = 0;
1864
1865 /* fill in our direct SSID IE... */
1866 if (is_direct) {
1867 /* ...next IE... */
1868 left -= 2 + priv->essid_len;
1869 if (left < 0)
1870 return 0;
1871 /* ... fill it in... */
1872 *pos++ = WLAN_EID_SSID;
1873 *pos++ = priv->essid_len;
1874 memcpy(pos, priv->essid, priv->essid_len);
1875 pos += priv->essid_len;
1876 len += 2 + priv->essid_len;
1877 }
1878
1879 /* fill in supported rate */
1880 /* ...next IE... */
1881 left -= 2;
1882 if (left < 0)
1883 return 0;
1884
1885 /* ... fill it in... */
1886 *pos++ = WLAN_EID_SUPP_RATES;
1887 *pos = 0;
1888
1889 /* exclude 60M rate */
1890 active_rates = priv->rates_mask;
1891 active_rates &= ~IWL_RATE_60M_MASK;
1892
1893 active_rate_basic = active_rates & 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 active_rate_basic, &left);
1898 active_rates &= ~ret_rates;
1899
1900 ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1901 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 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 (test_bit(STATUS_EXIT_PENDING, &priv->status))
2045 return;
2046
2047 if (!priv->qos_data.qos_enable)
2048 return;
2049
2050 spin_lock_irqsave(&priv->lock, flags);
2051 priv->qos_data.def_qos_parm.qos_flags = 0;
2052
2053 if (priv->qos_data.qos_cap.q_AP.queue_request &&
2054 !priv->qos_data.qos_cap.q_AP.txop_request)
2055 priv->qos_data.def_qos_parm.qos_flags |=
2056 QOS_PARAM_FLG_TXOP_TYPE_MSK;
2057 if (priv->qos_data.qos_active)
2058 priv->qos_data.def_qos_parm.qos_flags |=
2059 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2060
2061 #ifdef CONFIG_IWLWIFI_HT
2062 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
2063 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2064 #endif /* CONFIG_IWLWIFI_HT */
2065
2066 spin_unlock_irqrestore(&priv->lock, flags);
2067
2068 if (force || iwl_is_associated(priv)) {
2069 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2070 priv->qos_data.qos_active,
2071 priv->qos_data.def_qos_parm.qos_flags);
2072
2073 iwl_send_qos_params_command(priv,
2074 &(priv->qos_data.def_qos_parm));
2075 }
2076 }
2077
2078 #endif /* CONFIG_IWLWIFI_QOS */
2079 /*
2080 * Power management (not Tx power!) functions
2081 */
2082 #define MSEC_TO_USEC 1024
2083
2084 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2085 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2086 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2087 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2088 __constant_cpu_to_le32(X1), \
2089 __constant_cpu_to_le32(X2), \
2090 __constant_cpu_to_le32(X3), \
2091 __constant_cpu_to_le32(X4)}
2092
2093
2094 /* default power management (not Tx power) table values */
2095 /* for tim 0-10 */
2096 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2097 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2098 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2099 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2100 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2101 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2102 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2103 };
2104
2105 /* for tim > 10 */
2106 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2107 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2108 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2109 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2110 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2111 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2112 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2113 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2114 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2115 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2116 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2117 };
2118
2119 int iwl_power_init_handle(struct iwl_priv *priv)
2120 {
2121 int rc = 0, i;
2122 struct iwl_power_mgr *pow_data;
2123 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2124 u16 pci_pm;
2125
2126 IWL_DEBUG_POWER("Initialize power \n");
2127
2128 pow_data = &(priv->power_data);
2129
2130 memset(pow_data, 0, sizeof(*pow_data));
2131
2132 pow_data->active_index = IWL_POWER_RANGE_0;
2133 pow_data->dtim_val = 0xffff;
2134
2135 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2136 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2137
2138 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2139 if (rc != 0)
2140 return 0;
2141 else {
2142 struct iwl_powertable_cmd *cmd;
2143
2144 IWL_DEBUG_POWER("adjust power command flags\n");
2145
2146 for (i = 0; i < IWL_POWER_AC; i++) {
2147 cmd = &pow_data->pwr_range_0[i].cmd;
2148
2149 if (pci_pm & 0x1)
2150 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2151 else
2152 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2153 }
2154 }
2155 return rc;
2156 }
2157
2158 static int iwl_update_power_cmd(struct iwl_priv *priv,
2159 struct iwl_powertable_cmd *cmd, u32 mode)
2160 {
2161 int rc = 0, i;
2162 u8 skip;
2163 u32 max_sleep = 0;
2164 struct iwl_power_vec_entry *range;
2165 u8 period = 0;
2166 struct iwl_power_mgr *pow_data;
2167
2168 if (mode > IWL_POWER_INDEX_5) {
2169 IWL_DEBUG_POWER("Error invalid power mode \n");
2170 return -1;
2171 }
2172 pow_data = &(priv->power_data);
2173
2174 if (pow_data->active_index == IWL_POWER_RANGE_0)
2175 range = &pow_data->pwr_range_0[0];
2176 else
2177 range = &pow_data->pwr_range_1[1];
2178
2179 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2180
2181 #ifdef IWL_MAC80211_DISABLE
2182 if (priv->assoc_network != NULL) {
2183 unsigned long flags;
2184
2185 period = priv->assoc_network->tim.tim_period;
2186 }
2187 #endif /*IWL_MAC80211_DISABLE */
2188 skip = range[mode].no_dtim;
2189
2190 if (period == 0) {
2191 period = 1;
2192 skip = 0;
2193 }
2194
2195 if (skip == 0) {
2196 max_sleep = period;
2197 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2198 } else {
2199 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2200 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2201 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2202 }
2203
2204 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2205 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2206 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2207 }
2208
2209 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2210 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2211 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2212 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2213 le32_to_cpu(cmd->sleep_interval[0]),
2214 le32_to_cpu(cmd->sleep_interval[1]),
2215 le32_to_cpu(cmd->sleep_interval[2]),
2216 le32_to_cpu(cmd->sleep_interval[3]),
2217 le32_to_cpu(cmd->sleep_interval[4]));
2218
2219 return rc;
2220 }
2221
2222 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2223 {
2224 u32 final_mode = mode;
2225 int rc;
2226 struct iwl_powertable_cmd cmd;
2227
2228 /* If on battery, set to 3,
2229 * if plugged into AC power, set to CAM ("continuously aware mode"),
2230 * else user level */
2231 switch (mode) {
2232 case IWL_POWER_BATTERY:
2233 final_mode = IWL_POWER_INDEX_3;
2234 break;
2235 case IWL_POWER_AC:
2236 final_mode = IWL_POWER_MODE_CAM;
2237 break;
2238 default:
2239 final_mode = mode;
2240 break;
2241 }
2242
2243 cmd.keep_alive_beacons = 0;
2244
2245 iwl_update_power_cmd(priv, &cmd, final_mode);
2246
2247 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2248
2249 if (final_mode == IWL_POWER_MODE_CAM)
2250 clear_bit(STATUS_POWER_PMI, &priv->status);
2251 else
2252 set_bit(STATUS_POWER_PMI, &priv->status);
2253
2254 return rc;
2255 }
2256
2257 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2258 {
2259 /* Filter incoming packets to determine if they are targeted toward
2260 * this network, discarding packets coming from ourselves */
2261 switch (priv->iw_mode) {
2262 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2263 /* packets from our adapter are dropped (echo) */
2264 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2265 return 0;
2266 /* {broad,multi}cast packets to our IBSS go through */
2267 if (is_multicast_ether_addr(header->addr1))
2268 return !compare_ether_addr(header->addr3, priv->bssid);
2269 /* packets to our adapter go through */
2270 return !compare_ether_addr(header->addr1, priv->mac_addr);
2271 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2272 /* packets from our adapter are dropped (echo) */
2273 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2274 return 0;
2275 /* {broad,multi}cast packets to our BSS go through */
2276 if (is_multicast_ether_addr(header->addr1))
2277 return !compare_ether_addr(header->addr2, priv->bssid);
2278 /* packets to our adapter go through */
2279 return !compare_ether_addr(header->addr1, priv->mac_addr);
2280 }
2281
2282 return 1;
2283 }
2284
2285 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2286
2287 static const char *iwl_get_tx_fail_reason(u32 status)
2288 {
2289 switch (status & TX_STATUS_MSK) {
2290 case TX_STATUS_SUCCESS:
2291 return "SUCCESS";
2292 TX_STATUS_ENTRY(SHORT_LIMIT);
2293 TX_STATUS_ENTRY(LONG_LIMIT);
2294 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2295 TX_STATUS_ENTRY(MGMNT_ABORT);
2296 TX_STATUS_ENTRY(NEXT_FRAG);
2297 TX_STATUS_ENTRY(LIFE_EXPIRE);
2298 TX_STATUS_ENTRY(DEST_PS);
2299 TX_STATUS_ENTRY(ABORTED);
2300 TX_STATUS_ENTRY(BT_RETRY);
2301 TX_STATUS_ENTRY(STA_INVALID);
2302 TX_STATUS_ENTRY(FRAG_DROPPED);
2303 TX_STATUS_ENTRY(TID_DISABLE);
2304 TX_STATUS_ENTRY(FRAME_FLUSHED);
2305 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2306 TX_STATUS_ENTRY(TX_LOCKED);
2307 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2308 }
2309
2310 return "UNKNOWN";
2311 }
2312
2313 /**
2314 * iwl_scan_cancel - Cancel any currently executing HW scan
2315 *
2316 * NOTE: priv->mutex is not required before calling this function
2317 */
2318 static int iwl_scan_cancel(struct iwl_priv *priv)
2319 {
2320 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2321 clear_bit(STATUS_SCANNING, &priv->status);
2322 return 0;
2323 }
2324
2325 if (test_bit(STATUS_SCANNING, &priv->status)) {
2326 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2327 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2328 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2329 queue_work(priv->workqueue, &priv->abort_scan);
2330
2331 } else
2332 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2333
2334 return test_bit(STATUS_SCANNING, &priv->status);
2335 }
2336
2337 return 0;
2338 }
2339
2340 /**
2341 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2342 * @ms: amount of time to wait (in milliseconds) for scan to abort
2343 *
2344 * NOTE: priv->mutex must be held before calling this function
2345 */
2346 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2347 {
2348 unsigned long now = jiffies;
2349 int ret;
2350
2351 ret = iwl_scan_cancel(priv);
2352 if (ret && ms) {
2353 mutex_unlock(&priv->mutex);
2354 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2355 test_bit(STATUS_SCANNING, &priv->status))
2356 msleep(1);
2357 mutex_lock(&priv->mutex);
2358
2359 return test_bit(STATUS_SCANNING, &priv->status);
2360 }
2361
2362 return ret;
2363 }
2364
2365 static void iwl_sequence_reset(struct iwl_priv *priv)
2366 {
2367 /* Reset ieee stats */
2368
2369 /* We don't reset the net_device_stats (ieee->stats) on
2370 * re-association */
2371
2372 priv->last_seq_num = -1;
2373 priv->last_frag_num = -1;
2374 priv->last_packet_time = 0;
2375
2376 iwl_scan_cancel(priv);
2377 }
2378
2379 #define MAX_UCODE_BEACON_INTERVAL 4096
2380 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2381
2382 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2383 {
2384 u16 new_val = 0;
2385 u16 beacon_factor = 0;
2386
2387 beacon_factor =
2388 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2389 / MAX_UCODE_BEACON_INTERVAL;
2390 new_val = beacon_val / beacon_factor;
2391
2392 return cpu_to_le16(new_val);
2393 }
2394
2395 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2396 {
2397 u64 interval_tm_unit;
2398 u64 tsf, result;
2399 unsigned long flags;
2400 struct ieee80211_conf *conf = NULL;
2401 u16 beacon_int = 0;
2402
2403 conf = ieee80211_get_hw_conf(priv->hw);
2404
2405 spin_lock_irqsave(&priv->lock, flags);
2406 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2407 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2408
2409 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2410
2411 tsf = priv->timestamp1;
2412 tsf = ((tsf << 32) | priv->timestamp0);
2413
2414 beacon_int = priv->beacon_int;
2415 spin_unlock_irqrestore(&priv->lock, flags);
2416
2417 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2418 if (beacon_int == 0) {
2419 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2420 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2421 } else {
2422 priv->rxon_timing.beacon_interval =
2423 cpu_to_le16(beacon_int);
2424 priv->rxon_timing.beacon_interval =
2425 iwl_adjust_beacon_interval(
2426 le16_to_cpu(priv->rxon_timing.beacon_interval));
2427 }
2428
2429 priv->rxon_timing.atim_window = 0;
2430 } else {
2431 priv->rxon_timing.beacon_interval =
2432 iwl_adjust_beacon_interval(conf->beacon_int);
2433 /* TODO: we need to get atim_window from upper stack
2434 * for now we set to 0 */
2435 priv->rxon_timing.atim_window = 0;
2436 }
2437
2438 interval_tm_unit =
2439 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2440 result = do_div(tsf, interval_tm_unit);
2441 priv->rxon_timing.beacon_init_val =
2442 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2443
2444 IWL_DEBUG_ASSOC
2445 ("beacon interval %d beacon timer %d beacon tim %d\n",
2446 le16_to_cpu(priv->rxon_timing.beacon_interval),
2447 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2448 le16_to_cpu(priv->rxon_timing.atim_window));
2449 }
2450
2451 static int iwl_scan_initiate(struct iwl_priv *priv)
2452 {
2453 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2454 IWL_ERROR("APs don't scan.\n");
2455 return 0;
2456 }
2457
2458 if (!iwl_is_ready_rf(priv)) {
2459 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2460 return -EIO;
2461 }
2462
2463 if (test_bit(STATUS_SCANNING, &priv->status)) {
2464 IWL_DEBUG_SCAN("Scan already in progress.\n");
2465 return -EAGAIN;
2466 }
2467
2468 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2469 IWL_DEBUG_SCAN("Scan request while abort pending. "
2470 "Queuing.\n");
2471 return -EAGAIN;
2472 }
2473
2474 IWL_DEBUG_INFO("Starting scan...\n");
2475 priv->scan_bands = 2;
2476 set_bit(STATUS_SCANNING, &priv->status);
2477 priv->scan_start = jiffies;
2478 priv->scan_pass_start = priv->scan_start;
2479
2480 queue_work(priv->workqueue, &priv->request_scan);
2481
2482 return 0;
2483 }
2484
2485 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2486 {
2487 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2488
2489 if (hw_decrypt)
2490 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2491 else
2492 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2493
2494 return 0;
2495 }
2496
2497 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2498 {
2499 if (phymode == MODE_IEEE80211A) {
2500 priv->staging_rxon.flags &=
2501 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2502 | RXON_FLG_CCK_MSK);
2503 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2504 } else {
2505 /* Copied from iwl_bg_post_associate() */
2506 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2507 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2508 else
2509 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2510
2511 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2512 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2513
2514 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2515 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2516 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2517 }
2518 }
2519
2520 /*
2521 * initialize rxon structure with default values from eeprom
2522 */
2523 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2524 {
2525 const struct iwl_channel_info *ch_info;
2526
2527 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2528
2529 switch (priv->iw_mode) {
2530 case IEEE80211_IF_TYPE_AP:
2531 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2532 break;
2533
2534 case IEEE80211_IF_TYPE_STA:
2535 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2536 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2537 break;
2538
2539 case IEEE80211_IF_TYPE_IBSS:
2540 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2541 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2542 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2543 RXON_FILTER_ACCEPT_GRP_MSK;
2544 break;
2545
2546 case IEEE80211_IF_TYPE_MNTR:
2547 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2548 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2549 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2550 break;
2551 }
2552
2553 #if 0
2554 /* TODO: Figure out when short_preamble would be set and cache from
2555 * that */
2556 if (!hw_to_local(priv->hw)->short_preamble)
2557 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2558 else
2559 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2560 #endif
2561
2562 ch_info = iwl_get_channel_info(priv, priv->phymode,
2563 le16_to_cpu(priv->staging_rxon.channel));
2564
2565 if (!ch_info)
2566 ch_info = &priv->channel_info[0];
2567
2568 /*
2569 * in some case A channels are all non IBSS
2570 * in this case force B/G channel
2571 */
2572 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2573 !(is_channel_ibss(ch_info)))
2574 ch_info = &priv->channel_info[0];
2575
2576 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2577 if (is_channel_a_band(ch_info))
2578 priv->phymode = MODE_IEEE80211A;
2579 else
2580 priv->phymode = MODE_IEEE80211G;
2581
2582 iwl_set_flags_for_phymode(priv, priv->phymode);
2583
2584 priv->staging_rxon.ofdm_basic_rates =
2585 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2586 priv->staging_rxon.cck_basic_rates =
2587 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2588
2589 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2590 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2591 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2592 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2593 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2594 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2595 iwl4965_set_rxon_chain(priv);
2596 }
2597
2598 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2599 {
2600 if (!iwl_is_ready_rf(priv))
2601 return -EAGAIN;
2602
2603 if (mode == IEEE80211_IF_TYPE_IBSS) {
2604 const struct iwl_channel_info *ch_info;
2605
2606 ch_info = iwl_get_channel_info(priv,
2607 priv->phymode,
2608 le16_to_cpu(priv->staging_rxon.channel));
2609
2610 if (!ch_info || !is_channel_ibss(ch_info)) {
2611 IWL_ERROR("channel %d not IBSS channel\n",
2612 le16_to_cpu(priv->staging_rxon.channel));
2613 return -EINVAL;
2614 }
2615 }
2616
2617 cancel_delayed_work(&priv->scan_check);
2618 if (iwl_scan_cancel_timeout(priv, 100)) {
2619 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2620 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2621 return -EAGAIN;
2622 }
2623
2624 priv->iw_mode = mode;
2625
2626 iwl_connection_init_rx_config(priv);
2627 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2628
2629 iwl_clear_stations_table(priv);
2630
2631 iwl_commit_rxon(priv);
2632
2633 return 0;
2634 }
2635
2636 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2637 struct ieee80211_tx_control *ctl,
2638 struct iwl_cmd *cmd,
2639 struct sk_buff *skb_frag,
2640 int last_frag)
2641 {
2642 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2643
2644 switch (keyinfo->alg) {
2645 case ALG_CCMP:
2646 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2647 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2648 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2649 break;
2650
2651 case ALG_TKIP:
2652 #if 0
2653 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2654
2655 if (last_frag)
2656 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2657 8);
2658 else
2659 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2660 #endif
2661 break;
2662
2663 case ALG_WEP:
2664 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2665 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2666
2667 if (keyinfo->keylen == 13)
2668 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2669
2670 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2671
2672 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2673 "with key %d\n", ctl->key_idx);
2674 break;
2675
2676 default:
2677 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2678 break;
2679 }
2680 }
2681
2682 /*
2683 * handle build REPLY_TX command notification.
2684 */
2685 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2686 struct iwl_cmd *cmd,
2687 struct ieee80211_tx_control *ctrl,
2688 struct ieee80211_hdr *hdr,
2689 int is_unicast, u8 std_id)
2690 {
2691 __le16 *qc;
2692 u16 fc = le16_to_cpu(hdr->frame_control);
2693 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2694
2695 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2696 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2697 tx_flags |= TX_CMD_FLG_ACK_MSK;
2698 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2699 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2700 if (ieee80211_is_probe_response(fc) &&
2701 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2702 tx_flags |= TX_CMD_FLG_TSF_MSK;
2703 } else {
2704 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2705 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2706 }
2707
2708 cmd->cmd.tx.sta_id = std_id;
2709 if (ieee80211_get_morefrag(hdr))
2710 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2711
2712 qc = ieee80211_get_qos_ctrl(hdr);
2713 if (qc) {
2714 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2715 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2716 } else
2717 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2718
2719 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2720 tx_flags |= TX_CMD_FLG_RTS_MSK;
2721 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2722 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2723 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2724 tx_flags |= TX_CMD_FLG_CTS_MSK;
2725 }
2726
2727 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2728 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2729
2730 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2731 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2732 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2733 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2734 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2735 else
2736 cmd->cmd.tx.timeout.pm_frame_timeout = 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("Unknown 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->write_ptr];
2893 memset(tfd, 0, sizeof(*tfd));
2894 control_flags = (u32 *) tfd;
2895 idx = get_cmd_index(q, q->write_ptr, 0);
2896
2897 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
2898 txq->txb[q->write_ptr].skb[0] = skb;
2899 memcpy(&(txq->txb[q->write_ptr].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->write_ptr)));
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->write_ptr = iwl_queue_inc_wrap(q->write_ptr, 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_nic_access(priv))
3096 iwl_release_nic_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 = list_entry(p, struct iwl_ibss_seq, list);
3248 if (!compare_ether_addr(entry->mac, mac))
3249 break;
3250 }
3251 if (p == &priv->ibss_mac_hash[index]) {
3252 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3253 if (!entry) {
3254 IWL_ERROR("Cannot malloc new mac entry\n");
3255 return 0;
3256 }
3257 memcpy(entry->mac, mac, ETH_ALEN);
3258 entry->seq_num = seq;
3259 entry->frag_num = frag;
3260 entry->packet_time = jiffies;
3261 list_add(&entry->list, &priv->ibss_mac_hash[index]);
3262 return 0;
3263 }
3264 last_seq = &entry->seq_num;
3265 last_frag = &entry->frag_num;
3266 last_time = &entry->packet_time;
3267 break;
3268 }
3269 case IEEE80211_IF_TYPE_STA:
3270 last_seq = &priv->last_seq_num;
3271 last_frag = &priv->last_frag_num;
3272 last_time = &priv->last_packet_time;
3273 break;
3274 default:
3275 return 0;
3276 }
3277 if ((*last_seq == seq) &&
3278 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3279 if (*last_frag == frag)
3280 goto drop;
3281 if (*last_frag + 1 != frag)
3282 /* out-of-order fragment */
3283 goto drop;
3284 } else
3285 *last_seq = seq;
3286
3287 *last_frag = frag;
3288 *last_time = jiffies;
3289 return 0;
3290
3291 drop:
3292 return 1;
3293 }
3294
3295 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3296
3297 #include "iwl-spectrum.h"
3298
3299 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3300 #define BEACON_TIME_MASK_HIGH 0xFF000000
3301 #define TIME_UNIT 1024
3302
3303 /*
3304 * extended beacon time format
3305 * time in usec will be changed into a 32-bit value in 8:24 format
3306 * the high 1 byte is the beacon counts
3307 * the lower 3 bytes is the time in usec within one beacon interval
3308 */
3309
3310 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3311 {
3312 u32 quot;
3313 u32 rem;
3314 u32 interval = beacon_interval * 1024;
3315
3316 if (!interval || !usec)
3317 return 0;
3318
3319 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3320 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3321
3322 return (quot << 24) + rem;
3323 }
3324
3325 /* base is usually what we get from ucode with each received frame,
3326 * the same as HW timer counter counting down
3327 */
3328
3329 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3330 {
3331 u32 base_low = base & BEACON_TIME_MASK_LOW;
3332 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3333 u32 interval = beacon_interval * TIME_UNIT;
3334 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3335 (addon & BEACON_TIME_MASK_HIGH);
3336
3337 if (base_low > addon_low)
3338 res += base_low - addon_low;
3339 else if (base_low < addon_low) {
3340 res += interval + base_low - addon_low;
3341 res += (1 << 24);
3342 } else
3343 res += (1 << 24);
3344
3345 return cpu_to_le32(res);
3346 }
3347
3348 static int iwl_get_measurement(struct iwl_priv *priv,
3349 struct ieee80211_measurement_params *params,
3350 u8 type)
3351 {
3352 struct iwl_spectrum_cmd spectrum;
3353 struct iwl_rx_packet *res;
3354 struct iwl_host_cmd cmd = {
3355 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3356 .data = (void *)&spectrum,
3357 .meta.flags = CMD_WANT_SKB,
3358 };
3359 u32 add_time = le64_to_cpu(params->start_time);
3360 int rc;
3361 int spectrum_resp_status;
3362 int duration = le16_to_cpu(params->duration);
3363
3364 if (iwl_is_associated(priv))
3365 add_time =
3366 iwl_usecs_to_beacons(
3367 le64_to_cpu(params->start_time) - priv->last_tsf,
3368 le16_to_cpu(priv->rxon_timing.beacon_interval));
3369
3370 memset(&spectrum, 0, sizeof(spectrum));
3371
3372 spectrum.channel_count = cpu_to_le16(1);
3373 spectrum.flags =
3374 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3375 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3376 cmd.len = sizeof(spectrum);
3377 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3378
3379 if (iwl_is_associated(priv))
3380 spectrum.start_time =
3381 iwl_add_beacon_time(priv->last_beacon_time,
3382 add_time,
3383 le16_to_cpu(priv->rxon_timing.beacon_interval));
3384 else
3385 spectrum.start_time = 0;
3386
3387 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3388 spectrum.channels[0].channel = params->channel;
3389 spectrum.channels[0].type = type;
3390 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3391 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3392 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3393
3394 rc = iwl_send_cmd_sync(priv, &cmd);
3395 if (rc)
3396 return rc;
3397
3398 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3399 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3400 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3401 rc = -EIO;
3402 }
3403
3404 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3405 switch (spectrum_resp_status) {
3406 case 0: /* Command will be handled */
3407 if (res->u.spectrum.id != 0xff) {
3408 IWL_DEBUG_INFO
3409 ("Replaced existing measurement: %d\n",
3410 res->u.spectrum.id);
3411 priv->measurement_status &= ~MEASUREMENT_READY;
3412 }
3413 priv->measurement_status |= MEASUREMENT_ACTIVE;
3414 rc = 0;
3415 break;
3416
3417 case 1: /* Command will not be handled */
3418 rc = -EAGAIN;
3419 break;
3420 }
3421
3422 dev_kfree_skb_any(cmd.meta.u.skb);
3423
3424 return rc;
3425 }
3426 #endif
3427
3428 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3429 struct iwl_tx_info *tx_sta)
3430 {
3431
3432 tx_sta->status.ack_signal = 0;
3433 tx_sta->status.excessive_retries = 0;
3434 tx_sta->status.queue_length = 0;
3435 tx_sta->status.queue_number = 0;
3436
3437 if (in_interrupt())
3438 ieee80211_tx_status_irqsafe(priv->hw,
3439 tx_sta->skb[0], &(tx_sta->status));
3440 else
3441 ieee80211_tx_status(priv->hw,
3442 tx_sta->skb[0], &(tx_sta->status));
3443
3444 tx_sta->skb[0] = NULL;
3445 }
3446
3447 /**
3448 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3449 *
3450 * When FW advances 'R' index, all entries between old and
3451 * new 'R' index need to be reclaimed. As result, some free space
3452 * forms. If there is enough free space (> low mark), wake Tx queue.
3453 */
3454 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3455 {
3456 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3457 struct iwl_queue *q = &txq->q;
3458 int nfreed = 0;
3459
3460 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3461 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3462 "is out of range [0-%d] %d %d.\n", txq_id,
3463 index, q->n_bd, q->write_ptr, q->read_ptr);
3464 return 0;
3465 }
3466
3467 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3468 q->read_ptr != index;
3469 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3470 if (txq_id != IWL_CMD_QUEUE_NUM) {
3471 iwl_txstatus_to_ieee(priv,
3472 &(txq->txb[txq->q.read_ptr]));
3473 iwl_hw_txq_free_tfd(priv, txq);
3474 } else if (nfreed > 1) {
3475 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3476 q->write_ptr, q->read_ptr);
3477 queue_work(priv->workqueue, &priv->restart);
3478 }
3479 nfreed++;
3480 }
3481
3482 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3483 (txq_id != IWL_CMD_QUEUE_NUM) &&
3484 priv->mac80211_registered)
3485 ieee80211_wake_queue(priv->hw, txq_id);
3486
3487
3488 return nfreed;
3489 }
3490
3491 static int iwl_is_tx_success(u32 status)
3492 {
3493 status &= TX_STATUS_MSK;
3494 return (status == TX_STATUS_SUCCESS)
3495 || (status == TX_STATUS_DIRECT_DONE);
3496 }
3497
3498 /******************************************************************************
3499 *
3500 * Generic RX handler implementations
3501 *
3502 ******************************************************************************/
3503 #ifdef CONFIG_IWLWIFI_HT
3504 #ifdef CONFIG_IWLWIFI_HT_AGG
3505
3506 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3507 struct ieee80211_hdr *hdr)
3508 {
3509 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3510 return IWL_AP_ID;
3511 else {
3512 u8 *da = ieee80211_get_DA(hdr);
3513 return iwl_hw_find_station(priv, da);
3514 }
3515 }
3516
3517 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3518 struct iwl_priv *priv, int txq_id, int idx)
3519 {
3520 if (priv->txq[txq_id].txb[idx].skb[0])
3521 return (struct ieee80211_hdr *)priv->txq[txq_id].
3522 txb[idx].skb[0]->data;
3523 return NULL;
3524 }
3525
3526 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3527 {
3528 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3529 tx_resp->frame_count);
3530 return le32_to_cpu(*scd_ssn) & MAX_SN;
3531
3532 }
3533 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3534 struct iwl_ht_agg *agg,
3535 struct iwl_tx_resp *tx_resp,
3536 u16 start_idx)
3537 {
3538 u32 status;
3539 __le32 *frame_status = &tx_resp->status;
3540 struct ieee80211_tx_status *tx_status = NULL;
3541 struct ieee80211_hdr *hdr = NULL;
3542 int i, sh;
3543 int txq_id, idx;
3544 u16 seq;
3545
3546 if (agg->wait_for_ba)
3547 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3548
3549 agg->frame_count = tx_resp->frame_count;
3550 agg->start_idx = start_idx;
3551 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3552 agg->bitmap0 = agg->bitmap1 = 0;
3553
3554 if (agg->frame_count == 1) {
3555 struct iwl_tx_queue *txq ;
3556 status = le32_to_cpu(frame_status[0]);
3557
3558 txq_id = agg->txq_id;
3559 txq = &priv->txq[txq_id];
3560 /* FIXME: code repetition */
3561 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3562 agg->frame_count, agg->start_idx);
3563
3564 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3565 tx_status->retry_count = tx_resp->failure_frame;
3566 tx_status->queue_number = status & 0xff;
3567 tx_status->queue_length = tx_resp->bt_kill_count;
3568 tx_status->queue_length |= tx_resp->failure_rts;
3569
3570 tx_status->flags = iwl_is_tx_success(status)?
3571 IEEE80211_TX_STATUS_ACK : 0;
3572 tx_status->control.tx_rate =
3573 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3574 /* FIXME: code repetition end */
3575
3576 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3577 status & 0xff, tx_resp->failure_frame);
3578 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3579 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3580
3581 agg->wait_for_ba = 0;
3582 } else {
3583 u64 bitmap = 0;
3584 int start = agg->start_idx;
3585
3586 for (i = 0; i < agg->frame_count; i++) {
3587 u16 sc;
3588 status = le32_to_cpu(frame_status[i]);
3589 seq = status >> 16;
3590 idx = SEQ_TO_INDEX(seq);
3591 txq_id = SEQ_TO_QUEUE(seq);
3592
3593 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3594 AGG_TX_STATE_ABORT_MSK))
3595 continue;
3596
3597 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3598 agg->frame_count, txq_id, idx);
3599
3600 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3601
3602 sc = le16_to_cpu(hdr->seq_ctrl);
3603 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3604 IWL_ERROR("BUG_ON idx doesn't match seq control"
3605 " idx=%d, seq_idx=%d, seq=%d\n",
3606 idx, SEQ_TO_SN(sc),
3607 hdr->seq_ctrl);
3608 return -1;
3609 }
3610
3611 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3612 i, idx, SEQ_TO_SN(sc));
3613
3614 sh = idx - start;
3615 if (sh > 64) {
3616 sh = (start - idx) + 0xff;
3617 bitmap = bitmap << sh;
3618 sh = 0;
3619 start = idx;
3620 } else if (sh < -64)
3621 sh = 0xff - (start - idx);
3622 else if (sh < 0) {
3623 sh = start - idx;
3624 start = idx;
3625 bitmap = bitmap << sh;
3626 sh = 0;
3627 }
3628 bitmap |= (1 << sh);
3629 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3630 start, (u32)(bitmap & 0xFFFFFFFF));
3631 }
3632
3633 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3634 agg->bitmap1 = bitmap >> 32;
3635 agg->start_idx = start;
3636 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3637 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3638 agg->frame_count, agg->start_idx,
3639 agg->bitmap0);
3640
3641 if (bitmap)
3642 agg->wait_for_ba = 1;
3643 }
3644 return 0;
3645 }
3646 #endif
3647 #endif
3648
3649 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3650 struct iwl_rx_mem_buffer *rxb)
3651 {
3652 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3653 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3654 int txq_id = SEQ_TO_QUEUE(sequence);
3655 int index = SEQ_TO_INDEX(sequence);
3656 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3657 struct ieee80211_tx_status *tx_status;
3658 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3659 u32 status = le32_to_cpu(tx_resp->status);
3660 #ifdef CONFIG_IWLWIFI_HT
3661 #ifdef CONFIG_IWLWIFI_HT_AGG
3662 int tid, sta_id;
3663 #endif
3664 #endif
3665
3666 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3667 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3668 "is out of range [0-%d] %d %d\n", txq_id,
3669 index, txq->q.n_bd, txq->q.write_ptr,
3670 txq->q.read_ptr);
3671 return;
3672 }
3673
3674 #ifdef CONFIG_IWLWIFI_HT
3675 #ifdef CONFIG_IWLWIFI_HT_AGG
3676 if (txq->sched_retry) {
3677 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3678 struct ieee80211_hdr *hdr =
3679 iwl_tx_queue_get_hdr(priv, txq_id, index);
3680 struct iwl_ht_agg *agg = NULL;
3681 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3682
3683 if (qc == NULL) {
3684 IWL_ERROR("BUG_ON qc is null!!!!\n");
3685 return;
3686 }
3687
3688 tid = le16_to_cpu(*qc) & 0xf;
3689
3690 sta_id = iwl_get_ra_sta_id(priv, hdr);
3691 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3692 IWL_ERROR("Station not known for\n");
3693 return;
3694 }
3695
3696 agg = &priv->stations[sta_id].tid[tid].agg;
3697
3698 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3699
3700 if ((tx_resp->frame_count == 1) &&
3701 !iwl_is_tx_success(status)) {
3702 /* TODO: send BAR */
3703 }
3704
3705 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3706 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3707 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3708 "%d index %d\n", scd_ssn , index);
3709 iwl_tx_queue_reclaim(priv, txq_id, index);
3710 }
3711 } else {
3712 #endif /* CONFIG_IWLWIFI_HT_AGG */
3713 #endif /* CONFIG_IWLWIFI_HT */
3714 tx_status = &(txq->txb[txq->q.read_ptr].status);
3715
3716 tx_status->retry_count = tx_resp->failure_frame;
3717 tx_status->queue_number = status;
3718 tx_status->queue_length = tx_resp->bt_kill_count;
3719 tx_status->queue_length |= tx_resp->failure_rts;
3720
3721 tx_status->flags =
3722 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3723
3724 tx_status->control.tx_rate =
3725 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3726
3727 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3728 "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3729 status, le32_to_cpu(tx_resp->rate_n_flags),
3730 tx_resp->failure_frame);
3731
3732 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3733 if (index != -1)
3734 iwl_tx_queue_reclaim(priv, txq_id, index);
3735 #ifdef CONFIG_IWLWIFI_HT
3736 #ifdef CONFIG_IWLWIFI_HT_AGG
3737 }
3738 #endif /* CONFIG_IWLWIFI_HT_AGG */
3739 #endif /* CONFIG_IWLWIFI_HT */
3740
3741 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3742 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3743 }
3744
3745
3746 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3747 struct iwl_rx_mem_buffer *rxb)
3748 {
3749 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3750 struct iwl_alive_resp *palive;
3751 struct delayed_work *pwork;
3752
3753 palive = &pkt->u.alive_frame;
3754
3755 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3756 "0x%01X 0x%01X\n",
3757 palive->is_valid, palive->ver_type,
3758 palive->ver_subtype);
3759
3760 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3761 IWL_DEBUG_INFO("Initialization Alive received.\n");
3762 memcpy(&priv->card_alive_init,
3763 &pkt->u.alive_frame,
3764 sizeof(struct iwl_init_alive_resp));
3765 pwork = &priv->init_alive_start;
3766 } else {
3767 IWL_DEBUG_INFO("Runtime Alive received.\n");
3768 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3769 sizeof(struct iwl_alive_resp));
3770 pwork = &priv->alive_start;
3771 }
3772
3773 /* We delay the ALIVE response by 5ms to
3774 * give the HW RF Kill time to activate... */
3775 if (palive->is_valid == UCODE_VALID_OK)
3776 queue_delayed_work(priv->workqueue, pwork,
3777 msecs_to_jiffies(5));
3778 else
3779 IWL_WARNING("uCode did not respond OK.\n");
3780 }
3781
3782 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3783 struct iwl_rx_mem_buffer *rxb)
3784 {
3785 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3786
3787 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3788 return;
3789 }
3790
3791 static void iwl_rx_reply_error(struct iwl_priv *priv,
3792 struct iwl_rx_mem_buffer *rxb)
3793 {
3794 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3795
3796 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3797 "seq 0x%04X ser 0x%08X\n",
3798 le32_to_cpu(pkt->u.err_resp.error_type),
3799 get_cmd_string(pkt->u.err_resp.cmd_id),
3800 pkt->u.err_resp.cmd_id,
3801 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3802 le32_to_cpu(pkt->u.err_resp.error_info));
3803 }
3804
3805 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3806
3807 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3808 {
3809 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3810 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3811 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3812 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3813 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3814 rxon->channel = csa->channel;
3815 priv->staging_rxon.channel = csa->channel;
3816 }
3817
3818 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3819 struct iwl_rx_mem_buffer *rxb)
3820 {
3821 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3822 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3823 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3824
3825 if (!report->state) {
3826 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3827 "Spectrum Measure Notification: Start\n");
3828 return;
3829 }
3830
3831 memcpy(&priv->measure_report, report, sizeof(*report));
3832 priv->measurement_status |= MEASUREMENT_READY;
3833 #endif
3834 }
3835
3836 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3837 struct iwl_rx_mem_buffer *rxb)
3838 {
3839 #ifdef CONFIG_IWLWIFI_DEBUG
3840 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3841 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3842 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3843 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3844 #endif
3845 }
3846
3847 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3848 struct iwl_rx_mem_buffer *rxb)
3849 {
3850 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3851 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3852 "notification for %s:\n",
3853 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3854 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3855 }
3856
3857 static void iwl_bg_beacon_update(struct work_struct *work)
3858 {
3859 struct iwl_priv *priv =
3860 container_of(work, struct iwl_priv, beacon_update);
3861 struct sk_buff *beacon;
3862
3863 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3864 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3865
3866 if (!beacon) {
3867 IWL_ERROR("update beacon failed\n");
3868 return;
3869 }
3870
3871 mutex_lock(&priv->mutex);
3872 /* new beacon skb is allocated every time; dispose previous.*/
3873 if (priv->ibss_beacon)
3874 dev_kfree_skb(priv->ibss_beacon);
3875
3876 priv->ibss_beacon = beacon;
3877 mutex_unlock(&priv->mutex);
3878
3879 iwl_send_beacon_cmd(priv);
3880 }
3881
3882 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3883 struct iwl_rx_mem_buffer *rxb)
3884 {
3885 #ifdef CONFIG_IWLWIFI_DEBUG
3886 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3887 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3888 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3889
3890 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3891 "tsf %d %d rate %d\n",
3892 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3893 beacon->beacon_notify_hdr.failure_frame,
3894 le32_to_cpu(beacon->ibss_mgr_status),
3895 le32_to_cpu(beacon->high_tsf),
3896 le32_to_cpu(beacon->low_tsf), rate);
3897 #endif
3898
3899 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3900 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3901 queue_work(priv->workqueue, &priv->beacon_update);
3902 }
3903
3904 /* Service response to REPLY_SCAN_CMD (0x80) */
3905 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3906 struct iwl_rx_mem_buffer *rxb)
3907 {
3908 #ifdef CONFIG_IWLWIFI_DEBUG
3909 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3910 struct iwl_scanreq_notification *notif =
3911 (struct iwl_scanreq_notification *)pkt->u.raw;
3912
3913 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3914 #endif
3915 }
3916
3917 /* Service SCAN_START_NOTIFICATION (0x82) */
3918 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3919 struct iwl_rx_mem_buffer *rxb)
3920 {
3921 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3922 struct iwl_scanstart_notification *notif =
3923 (struct iwl_scanstart_notification *)pkt->u.raw;
3924 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3925 IWL_DEBUG_SCAN("Scan start: "
3926 "%d [802.11%s] "
3927 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3928 notif->channel,
3929 notif->band ? "bg" : "a",
3930 notif->tsf_high,
3931 notif->tsf_low, notif->status, notif->beacon_timer);
3932 }
3933
3934 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3935 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3936 struct iwl_rx_mem_buffer *rxb)
3937 {
3938 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3939 struct iwl_scanresults_notification *notif =
3940 (struct iwl_scanresults_notification *)pkt->u.raw;
3941
3942 IWL_DEBUG_SCAN("Scan ch.res: "
3943 "%d [802.11%s] "
3944 "(TSF: 0x%08X:%08X) - %d "
3945 "elapsed=%lu usec (%dms since last)\n",
3946 notif->channel,
3947 notif->band ? "bg" : "a",
3948 le32_to_cpu(notif->tsf_high),
3949 le32_to_cpu(notif->tsf_low),
3950 le32_to_cpu(notif->statistics[0]),
3951 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3952 jiffies_to_msecs(elapsed_jiffies
3953 (priv->last_scan_jiffies, jiffies)));
3954
3955 priv->last_scan_jiffies = jiffies;
3956 }
3957
3958 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3959 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3960 struct iwl_rx_mem_buffer *rxb)
3961 {
3962 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3963 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3964
3965 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3966 scan_notif->scanned_channels,
3967 scan_notif->tsf_low,
3968 scan_notif->tsf_high, scan_notif->status);
3969
3970 /* The HW is no longer scanning */
3971 clear_bit(STATUS_SCAN_HW, &priv->status);
3972
3973 /* The scan completion notification came in, so kill that timer... */
3974 cancel_delayed_work(&priv->scan_check);
3975
3976 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3977 (priv->scan_bands == 2) ? "2.4" : "5.2",
3978 jiffies_to_msecs(elapsed_jiffies
3979 (priv->scan_pass_start, jiffies)));
3980
3981 /* Remove this scanned band from the list
3982 * of pending bands to scan */
3983 priv->scan_bands--;
3984
3985 /* If a request to abort was given, or the scan did not succeed
3986 * then we reset the scan state machine and terminate,
3987 * re-queuing another scan if one has been requested */
3988 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3989 IWL_DEBUG_INFO("Aborted scan completed.\n");
3990 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3991 } else {
3992 /* If there are more bands on this scan pass reschedule */
3993 if (priv->scan_bands > 0)
3994 goto reschedule;
3995 }
3996
3997 priv->last_scan_jiffies = jiffies;
3998 IWL_DEBUG_INFO("Setting scan to off\n");
3999
4000 clear_bit(STATUS_SCANNING, &priv->status);
4001
4002 IWL_DEBUG_INFO("Scan took %dms\n",
4003 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4004
4005 queue_work(priv->workqueue, &priv->scan_completed);
4006
4007 return;
4008
4009 reschedule:
4010 priv->scan_pass_start = jiffies;
4011 queue_work(priv->workqueue, &priv->request_scan);
4012 }
4013
4014 /* Handle notification from uCode that card's power state is changing
4015 * due to software, hardware, or critical temperature RFKILL */
4016 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4017 struct iwl_rx_mem_buffer *rxb)
4018 {
4019 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4020 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4021 unsigned long status = priv->status;
4022
4023 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4024 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4025 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4026
4027 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4028 RF_CARD_DISABLED)) {
4029
4030 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4031 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4032
4033 if (!iwl_grab_nic_access(priv)) {
4034 iwl_write_direct32(
4035 priv, HBUS_TARG_MBX_C,
4036 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4037
4038 iwl_release_nic_access(priv);
4039 }
4040
4041 if (!(flags & RXON_CARD_DISABLED)) {
4042 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4043 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4044 if (!iwl_grab_nic_access(priv)) {
4045 iwl_write_direct32(
4046 priv, HBUS_TARG_MBX_C,
4047 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4048
4049 iwl_release_nic_access(priv);
4050 }
4051 }
4052
4053 if (flags & RF_CARD_DISABLED) {
4054 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4055 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4056 iwl_read32(priv, CSR_UCODE_DRV_GP1);
4057 if (!iwl_grab_nic_access(priv))
4058 iwl_release_nic_access(priv);
4059 }
4060 }
4061
4062 if (flags & HW_CARD_DISABLED)
4063 set_bit(STATUS_RF_KILL_HW, &priv->status);
4064 else
4065 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4066
4067
4068 if (flags & SW_CARD_DISABLED)
4069 set_bit(STATUS_RF_KILL_SW, &priv->status);
4070 else
4071 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4072
4073 if (!(flags & RXON_CARD_DISABLED))
4074 iwl_scan_cancel(priv);
4075
4076 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4077 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4078 (test_bit(STATUS_RF_KILL_SW, &status) !=
4079 test_bit(STATUS_RF_KILL_SW, &priv->status)))
4080 queue_work(priv->workqueue, &priv->rf_kill);
4081 else
4082 wake_up_interruptible(&priv->wait_command_queue);
4083 }
4084
4085 /**
4086 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4087 *
4088 * Setup the RX handlers for each of the reply types sent from the uCode
4089 * to the host.
4090 *
4091 * This function chains into the hardware specific files for them to setup
4092 * any hardware specific handlers as well.
4093 */
4094 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4095 {
4096 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4097 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4098 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4099 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4100 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4101 iwl_rx_spectrum_measure_notif;
4102 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4103 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4104 iwl_rx_pm_debug_statistics_notif;
4105 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4106
4107 /* NOTE: iwl_rx_statistics is different based on whether
4108 * the build is for the 3945 or the 4965. See the
4109 * corresponding implementation in iwl-XXXX.c
4110 *
4111 * The same handler is used for both the REPLY to a
4112 * discrete statistics request from the host as well as
4113 * for the periodic statistics notification from the uCode
4114 */
4115 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4116 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4117
4118 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4119 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4120 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4121 iwl_rx_scan_results_notif;
4122 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4123 iwl_rx_scan_complete_notif;
4124 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4125 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4126
4127 /* Setup hardware specific Rx handlers */
4128 iwl_hw_rx_handler_setup(priv);
4129 }
4130
4131 /**
4132 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4133 * @rxb: Rx buffer to reclaim
4134 *
4135 * If an Rx buffer has an async callback associated with it the callback
4136 * will be executed. The attached skb (if present) will only be freed
4137 * if the callback returns 1
4138 */
4139 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4140 struct iwl_rx_mem_buffer *rxb)
4141 {
4142 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4143 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4144 int txq_id = SEQ_TO_QUEUE(sequence);
4145 int index = SEQ_TO_INDEX(sequence);
4146 int huge = sequence & SEQ_HUGE_FRAME;
4147 int cmd_index;
4148 struct iwl_cmd *cmd;
4149
4150 /* If a Tx command is being handled and it isn't in the actual
4151 * command queue then there a command routing bug has been introduced
4152 * in the queue management code. */
4153 if (txq_id != IWL_CMD_QUEUE_NUM)
4154 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4155 txq_id, pkt->hdr.cmd);
4156 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4157
4158 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4159 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4160
4161 /* Input error checking is done when commands are added to queue. */
4162 if (cmd->meta.flags & CMD_WANT_SKB) {
4163 cmd->meta.source->u.skb = rxb->skb;
4164 rxb->skb = NULL;
4165 } else if (cmd->meta.u.callback &&
4166 !cmd->meta.u.callback(priv, cmd, rxb->skb))
4167 rxb->skb = NULL;
4168
4169 iwl_tx_queue_reclaim(priv, txq_id, index);
4170
4171 if (!(cmd->meta.flags & CMD_ASYNC)) {
4172 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4173 wake_up_interruptible(&priv->wait_command_queue);
4174 }
4175 }
4176
4177 /************************** RX-FUNCTIONS ****************************/
4178 /*
4179 * Rx theory of operation
4180 *
4181 * The host allocates 32 DMA target addresses and passes the host address
4182 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4183 * 0 to 31
4184 *
4185 * Rx Queue Indexes
4186 * The host/firmware share two index registers for managing the Rx buffers.
4187 *
4188 * The READ index maps to the first position that the firmware may be writing
4189 * to -- the driver can read up to (but not including) this position and get
4190 * good data.
4191 * The READ index is managed by the firmware once the card is enabled.
4192 *
4193 * The WRITE index maps to the last position the driver has read from -- the
4194 * position preceding WRITE is the last slot the firmware can place a packet.
4195 *
4196 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4197 * WRITE = READ.
4198 *
4199 * During initialization the host sets up the READ queue position to the first
4200 * INDEX position, and WRITE to the last (READ - 1 wrapped)
4201 *
4202 * When the firmware places a packet in a buffer it will advance the READ index
4203 * and fire the RX interrupt. The driver can then query the READ index and
4204 * process as many packets as possible, moving the WRITE index forward as it
4205 * resets the Rx queue buffers with new memory.
4206 *
4207 * The management in the driver is as follows:
4208 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
4209 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4210 * to replenish the iwl->rxq->rx_free.
4211 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4212 * iwl->rxq is replenished and the READ INDEX is updated (updating the
4213 * 'processed' and 'read' driver indexes as well)
4214 * + A received packet is processed and handed to the kernel network stack,
4215 * detached from the iwl->rxq. The driver 'processed' index is updated.
4216 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4217 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4218 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
4219 * were enough free buffers and RX_STALLED is set it is cleared.
4220 *
4221 *
4222 * Driver sequence:
4223 *
4224 * iwl_rx_queue_alloc() Allocates rx_free
4225 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
4226 * iwl_rx_queue_restock
4227 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
4228 * queue, updates firmware pointers, and updates
4229 * the WRITE index. If insufficient rx_free buffers
4230 * are available, schedules iwl_rx_replenish
4231 *
4232 * -- enable interrupts --
4233 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
4234 * READ INDEX, detaching the SKB from the pool.
4235 * Moves the packet buffer from queue to rx_used.
4236 * Calls iwl_rx_queue_restock to refill any empty
4237 * slots.
4238 * ...
4239 *
4240 */
4241
4242 /**
4243 * iwl_rx_queue_space - Return number of free slots available in queue.
4244 */
4245 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4246 {
4247 int s = q->read - q->write;
4248 if (s <= 0)
4249 s += RX_QUEUE_SIZE;
4250 /* keep some buffer to not confuse full and empty queue */
4251 s -= 2;
4252 if (s < 0)
4253 s = 0;
4254 return s;
4255 }
4256
4257 /**
4258 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4259 *
4260 * NOTE: This function has 3945 and 4965 specific code sections
4261 * but is declared in base due to the majority of the
4262 * implementation being the same (only a numeric constant is
4263 * different)
4264 *
4265 */
4266 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4267 {
4268 u32 reg = 0;
4269 int rc = 0;
4270 unsigned long flags;
4271
4272 spin_lock_irqsave(&q->lock, flags);
4273
4274 if (q->need_update == 0)
4275 goto exit_unlock;
4276
4277 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4278 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4279
4280 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4281 iwl_set_bit(priv, CSR_GP_CNTRL,
4282 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4283 goto exit_unlock;
4284 }
4285
4286 rc = iwl_grab_nic_access(priv);
4287 if (rc)
4288 goto exit_unlock;
4289
4290 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4291 q->write & ~0x7);
4292 iwl_release_nic_access(priv);
4293 } else
4294 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4295
4296
4297 q->need_update = 0;
4298
4299 exit_unlock:
4300 spin_unlock_irqrestore(&q->lock, flags);
4301 return rc;
4302 }
4303
4304 /**
4305 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4306 *
4307 * NOTE: This function has 3945 and 4965 specific code paths in it.
4308 */
4309 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4310 dma_addr_t dma_addr)
4311 {
4312 return cpu_to_le32((u32)(dma_addr >> 8));
4313 }
4314
4315
4316 /**
4317 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4318 *
4319 * If there are slots in the RX queue that need to be restocked,
4320 * and we have free pre-allocated buffers, fill the ranks as much
4321 * as we can pulling from rx_free.
4322 *
4323 * This moves the 'write' index forward to catch up with 'processed', and
4324 * also updates the memory address in the firmware to reference the new
4325 * target buffer.
4326 */
4327 static int iwl_rx_queue_restock(struct iwl_priv *priv)
4328 {
4329 struct iwl_rx_queue *rxq = &priv->rxq;
4330 struct list_head *element;
4331 struct iwl_rx_mem_buffer *rxb;
4332 unsigned long flags;
4333 int write, rc;
4334
4335 spin_lock_irqsave(&rxq->lock, flags);
4336 write = rxq->write & ~0x7;
4337 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4338 element = rxq->rx_free.next;
4339 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4340 list_del(element);
4341 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4342 rxq->queue[rxq->write] = rxb;
4343 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4344 rxq->free_count--;
4345 }
4346 spin_unlock_irqrestore(&rxq->lock, flags);
4347 /* If the pre-allocated buffer pool is dropping low, schedule to
4348 * refill it */
4349 if (rxq->free_count <= RX_LOW_WATERMARK)
4350 queue_work(priv->workqueue, &priv->rx_replenish);
4351
4352
4353 /* If we've added more space for the firmware to place data, tell it */
4354 if ((write != (rxq->write & ~0x7))
4355 || (abs(rxq->write - rxq->read) > 7)) {
4356 spin_lock_irqsave(&rxq->lock, flags);
4357 rxq->need_update = 1;
4358 spin_unlock_irqrestore(&rxq->lock, flags);
4359 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4360 if (rc)
4361 return rc;
4362 }
4363
4364 return 0;
4365 }
4366
4367 /**
4368 * iwl_rx_replenish - Move all used packet from rx_used to rx_free
4369 *
4370 * When moving to rx_free an SKB is allocated for the slot.
4371 *
4372 * Also restock the Rx queue via iwl_rx_queue_restock.
4373 * This is called as a scheduled work item (except for during initialization)
4374 */
4375 void iwl_rx_replenish(void *data)
4376 {
4377 struct iwl_priv *priv = data;
4378 struct iwl_rx_queue *rxq = &priv->rxq;
4379 struct list_head *element;
4380 struct iwl_rx_mem_buffer *rxb;
4381 unsigned long flags;
4382 spin_lock_irqsave(&rxq->lock, flags);
4383 while (!list_empty(&rxq->rx_used)) {
4384 element = rxq->rx_used.next;
4385 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4386 rxb->skb =
4387 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4388 if (!rxb->skb) {
4389 if (net_ratelimit())
4390 printk(KERN_CRIT DRV_NAME
4391 ": Can not allocate SKB buffers\n");
4392 /* We don't reschedule replenish work here -- we will
4393 * call the restock method and if it still needs
4394 * more buffers it will schedule replenish */
4395 break;
4396 }
4397 priv->alloc_rxb_skb++;
4398 list_del(element);
4399 rxb->dma_addr =
4400 pci_map_single(priv->pci_dev, rxb->skb->data,
4401 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4402 list_add_tail(&rxb->list, &rxq->rx_free);
4403 rxq->free_count++;
4404 }
4405 spin_unlock_irqrestore(&rxq->lock, flags);
4406
4407 spin_lock_irqsave(&priv->lock, flags);
4408 iwl_rx_queue_restock(priv);
4409 spin_unlock_irqrestore(&priv->lock, flags);
4410 }
4411
4412 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4413 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4414 * This free routine walks the list of POOL entries and if SKB is set to
4415 * non NULL it is unmapped and freed
4416 */
4417 static void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4418 {
4419 int i;
4420 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4421 if (rxq->pool[i].skb != NULL) {
4422 pci_unmap_single(priv->pci_dev,
4423 rxq->pool[i].dma_addr,
4424 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4425 dev_kfree_skb(rxq->pool[i].skb);
4426 }
4427 }
4428
4429 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4430 rxq->dma_addr);
4431 rxq->bd = NULL;
4432 }
4433
4434 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4435 {
4436 struct iwl_rx_queue *rxq = &priv->rxq;
4437 struct pci_dev *dev = priv->pci_dev;
4438 int i;
4439
4440 spin_lock_init(&rxq->lock);
4441 INIT_LIST_HEAD(&rxq->rx_free);
4442 INIT_LIST_HEAD(&rxq->rx_used);
4443 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4444 if (!rxq->bd)
4445 return -ENOMEM;
4446 /* Fill the rx_used queue with _all_ of the Rx buffers */
4447 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4448 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4449 /* Set us so that we have processed and used all buffers, but have
4450 * not restocked the Rx queue with fresh buffers */
4451 rxq->read = rxq->write = 0;
4452 rxq->free_count = 0;
4453 rxq->need_update = 0;
4454 return 0;
4455 }
4456
4457 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4458 {
4459 unsigned long flags;
4460 int i;
4461 spin_lock_irqsave(&rxq->lock, flags);
4462 INIT_LIST_HEAD(&rxq->rx_free);
4463 INIT_LIST_HEAD(&rxq->rx_used);
4464 /* Fill the rx_used queue with _all_ of the Rx buffers */
4465 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4466 /* In the reset function, these buffers may have been allocated
4467 * to an SKB, so we need to unmap and free potential storage */
4468 if (rxq->pool[i].skb != NULL) {
4469 pci_unmap_single(priv->pci_dev,
4470 rxq->pool[i].dma_addr,
4471 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4472 priv->alloc_rxb_skb--;
4473 dev_kfree_skb(rxq->pool[i].skb);
4474 rxq->pool[i].skb = NULL;
4475 }
4476 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4477 }
4478
4479 /* Set us so that we have processed and used all buffers, but have
4480 * not restocked the Rx queue with fresh buffers */
4481 rxq->read = rxq->write = 0;
4482 rxq->free_count = 0;
4483 spin_unlock_irqrestore(&rxq->lock, flags);
4484 }
4485
4486 /* Convert linear signal-to-noise ratio into dB */
4487 static u8 ratio2dB[100] = {
4488 /* 0 1 2 3 4 5 6 7 8 9 */
4489 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4490 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4491 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4492 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4493 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4494 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4495 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4496 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4497 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4498 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4499 };
4500
4501 /* Calculates a relative dB value from a ratio of linear
4502 * (i.e. not dB) signal levels.
4503 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4504 int iwl_calc_db_from_ratio(int sig_ratio)
4505 {
4506 /* 1000:1 or higher just report as 60 dB */
4507 if (sig_ratio >= 1000)
4508 return 60;
4509
4510 /* 100:1 or higher, divide by 10 and use table,
4511 * add 20 dB to make up for divide by 10 */
4512 if (sig_ratio >= 100)
4513 return (20 + (int)ratio2dB[sig_ratio/10]);
4514
4515 /* We shouldn't see this */
4516 if (sig_ratio < 1)
4517 return 0;
4518
4519 /* Use table for ratios 1:1 - 99:1 */
4520 return (int)ratio2dB[sig_ratio];
4521 }
4522
4523 #define PERFECT_RSSI (-20) /* dBm */
4524 #define WORST_RSSI (-95) /* dBm */
4525 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4526
4527 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4528 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4529 * about formulas used below. */
4530 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4531 {
4532 int sig_qual;
4533 int degradation = PERFECT_RSSI - rssi_dbm;
4534
4535 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4536 * as indicator; formula is (signal dbm - noise dbm).
4537 * SNR at or above 40 is a great signal (100%).
4538 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4539 * Weakest usable signal is usually 10 - 15 dB SNR. */
4540 if (noise_dbm) {
4541 if (rssi_dbm - noise_dbm >= 40)
4542 return 100;
4543 else if (rssi_dbm < noise_dbm)
4544 return 0;
4545 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4546
4547 /* Else use just the signal level.
4548 * This formula is a least squares fit of data points collected and
4549 * compared with a reference system that had a percentage (%) display
4550 * for signal quality. */
4551 } else
4552 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4553 (15 * RSSI_RANGE + 62 * degradation)) /
4554 (RSSI_RANGE * RSSI_RANGE);
4555
4556 if (sig_qual > 100)
4557 sig_qual = 100;
4558 else if (sig_qual < 1)
4559 sig_qual = 0;
4560
4561 return sig_qual;
4562 }
4563
4564 /**
4565 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4566 *
4567 * Uses the priv->rx_handlers callback function array to invoke
4568 * the appropriate handlers, including command responses,
4569 * frame-received notifications, and other notifications.
4570 */
4571 static void iwl_rx_handle(struct iwl_priv *priv)
4572 {
4573 struct iwl_rx_mem_buffer *rxb;
4574 struct iwl_rx_packet *pkt;
4575 struct iwl_rx_queue *rxq = &priv->rxq;
4576 u32 r, i;
4577 int reclaim;
4578 unsigned long flags;
4579
4580 r = iwl_hw_get_rx_read(priv);
4581 i = rxq->read;
4582
4583 /* Rx interrupt, but nothing sent from uCode */
4584 if (i == r)
4585 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4586
4587 while (i != r) {
4588 rxb = rxq->queue[i];
4589
4590 /* If an RXB doesn't have a queue slot associated with it
4591 * then a bug has been introduced in the queue refilling
4592 * routines -- catch it here */
4593 BUG_ON(rxb == NULL);
4594
4595 rxq->queue[i] = NULL;
4596
4597 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4598 IWL_RX_BUF_SIZE,
4599 PCI_DMA_FROMDEVICE);
4600 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4601
4602 /* Reclaim a command buffer only if this packet is a response
4603 * to a (driver-originated) command.
4604 * If the packet (e.g. Rx frame) originated from uCode,
4605 * there is no command buffer to reclaim.
4606 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4607 * but apparently a few don't get set; catch them here. */
4608 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4609 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4610 (pkt->hdr.cmd != REPLY_4965_RX) &&
4611 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4612 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4613 (pkt->hdr.cmd != REPLY_TX);
4614
4615 /* Based on type of command response or notification,
4616 * handle those that need handling via function in
4617 * rx_handlers table. See iwl_setup_rx_handlers() */
4618 if (priv->rx_handlers[pkt->hdr.cmd]) {
4619 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4620 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4621 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4622 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4623 } else {
4624 /* No handling needed */
4625 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4626 "r %d i %d No handler needed for %s, 0x%02x\n",
4627 r, i, get_cmd_string(pkt->hdr.cmd),
4628 pkt->hdr.cmd);
4629 }
4630
4631 if (reclaim) {
4632 /* Invoke any callbacks, transfer the skb to caller,
4633 * and fire off the (possibly) blocking iwl_send_cmd()
4634 * as we reclaim the driver command queue */
4635 if (rxb && rxb->skb)
4636 iwl_tx_cmd_complete(priv, rxb);
4637 else
4638 IWL_WARNING("Claim null rxb?\n");
4639 }
4640
4641 /* For now we just don't re-use anything. We can tweak this
4642 * later to try and re-use notification packets and SKBs that
4643 * fail to Rx correctly */
4644 if (rxb->skb != NULL) {
4645 priv->alloc_rxb_skb--;
4646 dev_kfree_skb_any(rxb->skb);
4647 rxb->skb = NULL;
4648 }
4649
4650 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4651 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4652 spin_lock_irqsave(&rxq->lock, flags);
4653 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4654 spin_unlock_irqrestore(&rxq->lock, flags);
4655 i = (i + 1) & RX_QUEUE_MASK;
4656 }
4657
4658 /* Backtrack one entry */
4659 priv->rxq.read = i;
4660 iwl_rx_queue_restock(priv);
4661 }
4662
4663 static int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4664 struct iwl_tx_queue *txq)
4665 {
4666 u32 reg = 0;
4667 int rc = 0;
4668 int txq_id = txq->q.id;
4669
4670 if (txq->need_update == 0)
4671 return rc;
4672
4673 /* if we're trying to save power */
4674 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4675 /* wake up nic if it's powered down ...
4676 * uCode will wake up, and interrupt us again, so next
4677 * time we'll skip this part. */
4678 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4679
4680 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4681 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4682 iwl_set_bit(priv, CSR_GP_CNTRL,
4683 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4684 return rc;
4685 }
4686
4687 /* restore this queue's parameters in nic hardware. */
4688 rc = iwl_grab_nic_access(priv);
4689 if (rc)
4690 return rc;
4691 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4692 txq->q.write_ptr | (txq_id << 8));
4693 iwl_release_nic_access(priv);
4694
4695 /* else not in power-save mode, uCode will never sleep when we're
4696 * trying to tx (during RFKILL, we're not trying to tx). */
4697 } else
4698 iwl_write32(priv, HBUS_TARG_WRPTR,
4699 txq->q.write_ptr | (txq_id << 8));
4700
4701 txq->need_update = 0;
4702
4703 return rc;
4704 }
4705
4706 #ifdef CONFIG_IWLWIFI_DEBUG
4707 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4708 {
4709 DECLARE_MAC_BUF(mac);
4710
4711 IWL_DEBUG_RADIO("RX CONFIG:\n");
4712 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4713 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4714 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4715 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4716 le32_to_cpu(rxon->filter_flags));
4717 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4718 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4719 rxon->ofdm_basic_rates);
4720 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4721 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4722 print_mac(mac, rxon->node_addr));
4723 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4724 print_mac(mac, rxon->bssid_addr));
4725 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4726 }
4727 #endif
4728
4729 static void iwl_enable_interrupts(struct iwl_priv *priv)
4730 {
4731 IWL_DEBUG_ISR("Enabling interrupts\n");
4732 set_bit(STATUS_INT_ENABLED, &priv->status);
4733 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4734 }
4735
4736 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4737 {
4738 clear_bit(STATUS_INT_ENABLED, &priv->status);
4739
4740 /* disable interrupts from uCode/NIC to host */
4741 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4742
4743 /* acknowledge/clear/reset any interrupts still pending
4744 * from uCode or flow handler (Rx/Tx DMA) */
4745 iwl_write32(priv, CSR_INT, 0xffffffff);
4746 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4747 IWL_DEBUG_ISR("Disabled interrupts\n");
4748 }
4749
4750 static const char *desc_lookup(int i)
4751 {
4752 switch (i) {
4753 case 1:
4754 return "FAIL";
4755 case 2:
4756 return "BAD_PARAM";
4757 case 3:
4758 return "BAD_CHECKSUM";
4759 case 4:
4760 return "NMI_INTERRUPT";
4761 case 5:
4762 return "SYSASSERT";
4763 case 6:
4764 return "FATAL_ERROR";
4765 }
4766
4767 return "UNKNOWN";
4768 }
4769
4770 #define ERROR_START_OFFSET (1 * sizeof(u32))
4771 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4772
4773 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4774 {
4775 u32 data2, line;
4776 u32 desc, time, count, base, data1;
4777 u32 blink1, blink2, ilink1, ilink2;
4778 int rc;
4779
4780 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4781
4782 if (!iwl_hw_valid_rtc_data_addr(base)) {
4783 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4784 return;
4785 }
4786
4787 rc = iwl_grab_nic_access(priv);
4788 if (rc) {
4789 IWL_WARNING("Can not read from adapter at this time.\n");
4790 return;
4791 }
4792
4793 count = iwl_read_targ_mem(priv, base);
4794
4795 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4796 IWL_ERROR("Start IWL Error Log Dump:\n");
4797 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4798 priv->status, priv->config, count);
4799 }
4800
4801 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4802 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4803 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4804 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4805 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4806 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4807 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4808 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4809 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4810
4811 IWL_ERROR("Desc Time "
4812 "data1 data2 line\n");
4813 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4814 desc_lookup(desc), desc, time, data1, data2, line);
4815 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4816 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4817 ilink1, ilink2);
4818
4819 iwl_release_nic_access(priv);
4820 }
4821
4822 #define EVENT_START_OFFSET (4 * sizeof(u32))
4823
4824 /**
4825 * iwl_print_event_log - Dump error event log to syslog
4826 *
4827 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4828 */
4829 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4830 u32 num_events, u32 mode)
4831 {
4832 u32 i;
4833 u32 base; /* SRAM byte address of event log header */
4834 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4835 u32 ptr; /* SRAM byte address of log data */
4836 u32 ev, time, data; /* event log data */
4837
4838 if (num_events == 0)
4839 return;
4840
4841 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4842
4843 if (mode == 0)
4844 event_size = 2 * sizeof(u32);
4845 else
4846 event_size = 3 * sizeof(u32);
4847
4848 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4849
4850 /* "time" is actually "data" for mode 0 (no timestamp).
4851 * place event id # at far right for easier visual parsing. */
4852 for (i = 0; i < num_events; i++) {
4853 ev = iwl_read_targ_mem(priv, ptr);
4854 ptr += sizeof(u32);
4855 time = iwl_read_targ_mem(priv, ptr);
4856 ptr += sizeof(u32);
4857 if (mode == 0)
4858 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4859 else {
4860 data = iwl_read_targ_mem(priv, ptr);
4861 ptr += sizeof(u32);
4862 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4863 }
4864 }
4865 }
4866
4867 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4868 {
4869 int rc;
4870 u32 base; /* SRAM byte address of event log header */
4871 u32 capacity; /* event log capacity in # entries */
4872 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4873 u32 num_wraps; /* # times uCode wrapped to top of log */
4874 u32 next_entry; /* index of next entry to be written by uCode */
4875 u32 size; /* # entries that we'll print */
4876
4877 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4878 if (!iwl_hw_valid_rtc_data_addr(base)) {
4879 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4880 return;
4881 }
4882
4883 rc = iwl_grab_nic_access(priv);
4884 if (rc) {
4885 IWL_WARNING("Can not read from adapter at this time.\n");
4886 return;
4887 }
4888
4889 /* event log header */
4890 capacity = iwl_read_targ_mem(priv, base);
4891 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4892 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4893 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4894
4895 size = num_wraps ? capacity : next_entry;
4896
4897 /* bail out if nothing in log */
4898 if (size == 0) {
4899 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4900 iwl_release_nic_access(priv);
4901 return;
4902 }
4903
4904 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4905 size, num_wraps);
4906
4907 /* if uCode has wrapped back to top of log, start at the oldest entry,
4908 * i.e the next one that uCode would fill. */
4909 if (num_wraps)
4910 iwl_print_event_log(priv, next_entry,
4911 capacity - next_entry, mode);
4912
4913 /* (then/else) start at top of log */
4914 iwl_print_event_log(priv, 0, next_entry, mode);
4915
4916 iwl_release_nic_access(priv);
4917 }
4918
4919 /**
4920 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4921 */
4922 static void iwl_irq_handle_error(struct iwl_priv *priv)
4923 {
4924 /* Set the FW error flag -- cleared on iwl_down */
4925 set_bit(STATUS_FW_ERROR, &priv->status);
4926
4927 /* Cancel currently queued command. */
4928 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4929
4930 #ifdef CONFIG_IWLWIFI_DEBUG
4931 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4932 iwl_dump_nic_error_log(priv);
4933 iwl_dump_nic_event_log(priv);
4934 iwl_print_rx_config_cmd(&priv->staging_rxon);
4935 }
4936 #endif
4937
4938 wake_up_interruptible(&priv->wait_command_queue);
4939
4940 /* Keep the restart process from trying to send host
4941 * commands by clearing the INIT status bit */
4942 clear_bit(STATUS_READY, &priv->status);
4943
4944 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4945 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4946 "Restarting adapter due to uCode error.\n");
4947
4948 if (iwl_is_associated(priv)) {
4949 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4950 sizeof(priv->recovery_rxon));
4951 priv->error_recovering = 1;
4952 }
4953 queue_work(priv->workqueue, &priv->restart);
4954 }
4955 }
4956
4957 static void iwl_error_recovery(struct iwl_priv *priv)
4958 {
4959 unsigned long flags;
4960
4961 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4962 sizeof(priv->staging_rxon));
4963 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4964 iwl_commit_rxon(priv);
4965
4966 iwl_rxon_add_station(priv, priv->bssid, 1);
4967
4968 spin_lock_irqsave(&priv->lock, flags);
4969 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4970 priv->error_recovering = 0;
4971 spin_unlock_irqrestore(&priv->lock, flags);
4972 }
4973
4974 static void iwl_irq_tasklet(struct iwl_priv *priv)
4975 {
4976 u32 inta, handled = 0;
4977 u32 inta_fh;
4978 unsigned long flags;
4979 #ifdef CONFIG_IWLWIFI_DEBUG
4980 u32 inta_mask;
4981 #endif
4982
4983 spin_lock_irqsave(&priv->lock, flags);
4984
4985 /* Ack/clear/reset pending uCode interrupts.
4986 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4987 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4988 inta = iwl_read32(priv, CSR_INT);
4989 iwl_write32(priv, CSR_INT, inta);
4990
4991 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4992 * Any new interrupts that happen after this, either while we're
4993 * in this tasklet, or later, will show up in next ISR/tasklet. */
4994 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4995 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4996
4997 #ifdef CONFIG_IWLWIFI_DEBUG
4998 if (iwl_debug_level & IWL_DL_ISR) {
4999 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5000 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5001 inta, inta_mask, inta_fh);
5002 }
5003 #endif
5004
5005 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5006 * atomic, make sure that inta covers all the interrupts that
5007 * we've discovered, even if FH interrupt came in just after
5008 * reading CSR_INT. */
5009 if (inta_fh & CSR_FH_INT_RX_MASK)
5010 inta |= CSR_INT_BIT_FH_RX;
5011 if (inta_fh & CSR_FH_INT_TX_MASK)
5012 inta |= CSR_INT_BIT_FH_TX;
5013
5014 /* Now service all interrupt bits discovered above. */
5015 if (inta & CSR_INT_BIT_HW_ERR) {
5016 IWL_ERROR("Microcode HW error detected. Restarting.\n");
5017
5018 /* Tell the device to stop sending interrupts */
5019 iwl_disable_interrupts(priv);
5020
5021 iwl_irq_handle_error(priv);
5022
5023 handled |= CSR_INT_BIT_HW_ERR;
5024
5025 spin_unlock_irqrestore(&priv->lock, flags);
5026
5027 return;
5028 }
5029
5030 #ifdef CONFIG_IWLWIFI_DEBUG
5031 if (iwl_debug_level & (IWL_DL_ISR)) {
5032 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5033 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5034 IWL_DEBUG_ISR("Microcode started or stopped.\n");
5035
5036 /* Alive notification via Rx interrupt will do the real work */
5037 if (inta & CSR_INT_BIT_ALIVE)
5038 IWL_DEBUG_ISR("Alive interrupt\n");
5039 }
5040 #endif
5041 /* Safely ignore these bits for debug checks below */
5042 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5043
5044 /* HW RF KILL switch toggled (4965 only) */
5045 if (inta & CSR_INT_BIT_RF_KILL) {
5046 int hw_rf_kill = 0;
5047 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5048 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5049 hw_rf_kill = 1;
5050
5051 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5052 "RF_KILL bit toggled to %s.\n",
5053 hw_rf_kill ? "disable radio":"enable radio");
5054
5055 /* Queue restart only if RF_KILL switch was set to "kill"
5056 * when we loaded driver, and is now set to "enable".
5057 * After we're Alive, RF_KILL gets handled by
5058 * iwl_rx_card_state_notif() */
5059 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5060 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5061 queue_work(priv->workqueue, &priv->restart);
5062 }
5063
5064 handled |= CSR_INT_BIT_RF_KILL;
5065 }
5066
5067 /* Chip got too hot and stopped itself (4965 only) */
5068 if (inta & CSR_INT_BIT_CT_KILL) {
5069 IWL_ERROR("Microcode CT kill error detected.\n");
5070 handled |= CSR_INT_BIT_CT_KILL;
5071 }
5072
5073 /* Error detected by uCode */
5074 if (inta & CSR_INT_BIT_SW_ERR) {
5075 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
5076 inta);
5077 iwl_irq_handle_error(priv);
5078 handled |= CSR_INT_BIT_SW_ERR;
5079 }
5080
5081 /* uCode wakes up after power-down sleep */
5082 if (inta & CSR_INT_BIT_WAKEUP) {
5083 IWL_DEBUG_ISR("Wakeup interrupt\n");
5084 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5085 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5086 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5087 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5088 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5089 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5090 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5091
5092 handled |= CSR_INT_BIT_WAKEUP;
5093 }
5094
5095 /* All uCode command responses, including Tx command responses,
5096 * Rx "responses" (frame-received notification), and other
5097 * notifications from uCode come through here*/
5098 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5099 iwl_rx_handle(priv);
5100 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5101 }
5102
5103 if (inta & CSR_INT_BIT_FH_TX) {
5104 IWL_DEBUG_ISR("Tx interrupt\n");
5105 handled |= CSR_INT_BIT_FH_TX;
5106 }
5107
5108 if (inta & ~handled)
5109 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5110
5111 if (inta & ~CSR_INI_SET_MASK) {
5112 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5113 inta & ~CSR_INI_SET_MASK);
5114 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
5115 }
5116
5117 /* Re-enable all interrupts */
5118 iwl_enable_interrupts(priv);
5119
5120 #ifdef CONFIG_IWLWIFI_DEBUG
5121 if (iwl_debug_level & (IWL_DL_ISR)) {
5122 inta = iwl_read32(priv, CSR_INT);
5123 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5124 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5125 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5126 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5127 }
5128 #endif
5129 spin_unlock_irqrestore(&priv->lock, flags);
5130 }
5131
5132 static irqreturn_t iwl_isr(int irq, void *data)
5133 {
5134 struct iwl_priv *priv = data;
5135 u32 inta, inta_mask;
5136 u32 inta_fh;
5137 if (!priv)
5138 return IRQ_NONE;
5139
5140 spin_lock(&priv->lock);
5141
5142 /* Disable (but don't clear!) interrupts here to avoid
5143 * back-to-back ISRs and sporadic interrupts from our NIC.
5144 * If we have something to service, the tasklet will re-enable ints.
5145 * If we *don't* have something, we'll re-enable before leaving here. */
5146 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5147 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5148
5149 /* Discover which interrupts are active/pending */
5150 inta = iwl_read32(priv, CSR_INT);
5151 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5152
5153 /* Ignore interrupt if there's nothing in NIC to service.
5154 * This may be due to IRQ shared with another device,
5155 * or due to sporadic interrupts thrown from our NIC. */
5156 if (!inta && !inta_fh) {
5157 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5158 goto none;
5159 }
5160
5161 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5162 /* Hardware disappeared. It might have already raised
5163 * an interrupt */
5164 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5165 goto unplugged;
5166 }
5167
5168 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5169 inta, inta_mask, inta_fh);
5170
5171 /* iwl_irq_tasklet() will service interrupts and re-enable them */
5172 tasklet_schedule(&priv->irq_tasklet);
5173
5174 unplugged:
5175 spin_unlock(&priv->lock);
5176 return IRQ_HANDLED;
5177
5178 none:
5179 /* re-enable interrupts here since we don't have anything to service. */
5180 iwl_enable_interrupts(priv);
5181 spin_unlock(&priv->lock);
5182 return IRQ_NONE;
5183 }
5184
5185 /************************** EEPROM BANDS ****************************
5186 *
5187 * The iwl_eeprom_band definitions below provide the mapping from the
5188 * EEPROM contents to the specific channel number supported for each
5189 * band.
5190 *
5191 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5192 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5193 * The specific geography and calibration information for that channel
5194 * is contained in the eeprom map itself.
5195 *
5196 * During init, we copy the eeprom information and channel map
5197 * information into priv->channel_info_24/52 and priv->channel_map_24/52
5198 *
5199 * channel_map_24/52 provides the index in the channel_info array for a
5200 * given channel. We have to have two separate maps as there is channel
5201 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5202 * band_2
5203 *
5204 * A value of 0xff stored in the channel_map indicates that the channel
5205 * is not supported by the hardware at all.
5206 *
5207 * A value of 0xfe in the channel_map indicates that the channel is not
5208 * valid for Tx with the current hardware. This means that
5209 * while the system can tune and receive on a given channel, it may not
5210 * be able to associate or transmit any frames on that
5211 * channel. There is no corresponding channel information for that
5212 * entry.
5213 *
5214 *********************************************************************/
5215
5216 /* 2.4 GHz */
5217 static const u8 iwl_eeprom_band_1[14] = {
5218 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5219 };
5220
5221 /* 5.2 GHz bands */
5222 static const u8 iwl_eeprom_band_2[] = {
5223 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5224 };
5225
5226 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5227 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5228 };
5229
5230 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5231 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5232 };
5233
5234 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5235 145, 149, 153, 157, 161, 165
5236 };
5237
5238 static u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
5239 1, 2, 3, 4, 5, 6, 7
5240 };
5241
5242 static u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
5243 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5244 };
5245
5246 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5247 int *eeprom_ch_count,
5248 const struct iwl_eeprom_channel
5249 **eeprom_ch_info,
5250 const u8 **eeprom_ch_index)
5251 {
5252 switch (band) {
5253 case 1: /* 2.4GHz band */
5254 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5255 *eeprom_ch_info = priv->eeprom.band_1_channels;
5256 *eeprom_ch_index = iwl_eeprom_band_1;
5257 break;
5258 case 2: /* 5.2GHz band */
5259 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5260 *eeprom_ch_info = priv->eeprom.band_2_channels;
5261 *eeprom_ch_index = iwl_eeprom_band_2;
5262 break;
5263 case 3: /* 5.2GHz band */
5264 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5265 *eeprom_ch_info = priv->eeprom.band_3_channels;
5266 *eeprom_ch_index = iwl_eeprom_band_3;
5267 break;
5268 case 4: /* 5.2GHz band */
5269 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5270 *eeprom_ch_info = priv->eeprom.band_4_channels;
5271 *eeprom_ch_index = iwl_eeprom_band_4;
5272 break;
5273 case 5: /* 5.2GHz band */
5274 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5275 *eeprom_ch_info = priv->eeprom.band_5_channels;
5276 *eeprom_ch_index = iwl_eeprom_band_5;
5277 break;
5278 case 6:
5279 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5280 *eeprom_ch_info = priv->eeprom.band_24_channels;
5281 *eeprom_ch_index = iwl_eeprom_band_6;
5282 break;
5283 case 7:
5284 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5285 *eeprom_ch_info = priv->eeprom.band_52_channels;
5286 *eeprom_ch_index = iwl_eeprom_band_7;
5287 break;
5288 default:
5289 BUG();
5290 return;
5291 }
5292 }
5293
5294 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5295 int phymode, u16 channel)
5296 {
5297 int i;
5298
5299 switch (phymode) {
5300 case MODE_IEEE80211A:
5301 for (i = 14; i < priv->channel_count; i++) {
5302 if (priv->channel_info[i].channel == channel)
5303 return &priv->channel_info[i];
5304 }
5305 break;
5306
5307 case MODE_IEEE80211B:
5308 case MODE_IEEE80211G:
5309 if (channel >= 1 && channel <= 14)
5310 return &priv->channel_info[channel - 1];
5311 break;
5312
5313 }
5314
5315 return NULL;
5316 }
5317
5318 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5319 ? # x " " : "")
5320
5321 static int iwl_init_channel_map(struct iwl_priv *priv)
5322 {
5323 int eeprom_ch_count = 0;
5324 const u8 *eeprom_ch_index = NULL;
5325 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5326 int band, ch;
5327 struct iwl_channel_info *ch_info;
5328
5329 if (priv->channel_count) {
5330 IWL_DEBUG_INFO("Channel map already initialized.\n");
5331 return 0;
5332 }
5333
5334 if (priv->eeprom.version < 0x2f) {
5335 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5336 priv->eeprom.version);
5337 return -EINVAL;
5338 }
5339
5340 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5341
5342 priv->channel_count =
5343 ARRAY_SIZE(iwl_eeprom_band_1) +
5344 ARRAY_SIZE(iwl_eeprom_band_2) +
5345 ARRAY_SIZE(iwl_eeprom_band_3) +
5346 ARRAY_SIZE(iwl_eeprom_band_4) +
5347 ARRAY_SIZE(iwl_eeprom_band_5);
5348
5349 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5350
5351 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5352 priv->channel_count, GFP_KERNEL);
5353 if (!priv->channel_info) {
5354 IWL_ERROR("Could not allocate channel_info\n");
5355 priv->channel_count = 0;
5356 return -ENOMEM;
5357 }
5358
5359 ch_info = priv->channel_info;
5360
5361 /* Loop through the 5 EEPROM bands adding them in order to the
5362 * channel map we maintain (that contains additional information than
5363 * what just in the EEPROM) */
5364 for (band = 1; band <= 5; band++) {
5365
5366 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5367 &eeprom_ch_info, &eeprom_ch_index);
5368
5369 /* Loop through each band adding each of the channels */
5370 for (ch = 0; ch < eeprom_ch_count; ch++) {
5371 ch_info->channel = eeprom_ch_index[ch];
5372 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5373 MODE_IEEE80211A;
5374
5375 /* permanently store EEPROM's channel regulatory flags
5376 * and max power in channel info database. */
5377 ch_info->eeprom = eeprom_ch_info[ch];
5378
5379 /* Copy the run-time flags so they are there even on
5380 * invalid channels */
5381 ch_info->flags = eeprom_ch_info[ch].flags;
5382
5383 if (!(is_channel_valid(ch_info))) {
5384 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5385 "No traffic\n",
5386 ch_info->channel,
5387 ch_info->flags,
5388 is_channel_a_band(ch_info) ?
5389 "5.2" : "2.4");
5390 ch_info++;
5391 continue;
5392 }
5393
5394 /* Initialize regulatory-based run-time data */
5395 ch_info->max_power_avg = ch_info->curr_txpow =
5396 eeprom_ch_info[ch].max_power_avg;
5397 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5398 ch_info->min_power = 0;
5399
5400 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5401 " %ddBm): Ad-Hoc %ssupported\n",
5402 ch_info->channel,
5403 is_channel_a_band(ch_info) ?
5404 "5.2" : "2.4",
5405 CHECK_AND_PRINT(IBSS),
5406 CHECK_AND_PRINT(ACTIVE),
5407 CHECK_AND_PRINT(RADAR),
5408 CHECK_AND_PRINT(WIDE),
5409 CHECK_AND_PRINT(NARROW),
5410 CHECK_AND_PRINT(DFS),
5411 eeprom_ch_info[ch].flags,
5412 eeprom_ch_info[ch].max_power_avg,
5413 ((eeprom_ch_info[ch].
5414 flags & EEPROM_CHANNEL_IBSS)
5415 && !(eeprom_ch_info[ch].
5416 flags & EEPROM_CHANNEL_RADAR))
5417 ? "" : "not ");
5418
5419 /* Set the user_txpower_limit to the highest power
5420 * supported by any channel */
5421 if (eeprom_ch_info[ch].max_power_avg >
5422 priv->user_txpower_limit)
5423 priv->user_txpower_limit =
5424 eeprom_ch_info[ch].max_power_avg;
5425
5426 ch_info++;
5427 }
5428 }
5429
5430 for (band = 6; band <= 7; band++) {
5431 int phymode;
5432 u8 fat_extension_chan;
5433
5434 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5435 &eeprom_ch_info, &eeprom_ch_index);
5436
5437 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5438 /* Loop through each band adding each of the channels */
5439 for (ch = 0; ch < eeprom_ch_count; ch++) {
5440
5441 if ((band == 6) &&
5442 ((eeprom_ch_index[ch] == 5) ||
5443 (eeprom_ch_index[ch] == 6) ||
5444 (eeprom_ch_index[ch] == 7)))
5445 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5446 else
5447 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5448
5449 iwl4965_set_fat_chan_info(priv, phymode,
5450 eeprom_ch_index[ch],
5451 &(eeprom_ch_info[ch]),
5452 fat_extension_chan);
5453
5454 iwl4965_set_fat_chan_info(priv, phymode,
5455 (eeprom_ch_index[ch] + 4),
5456 &(eeprom_ch_info[ch]),
5457 HT_IE_EXT_CHANNEL_BELOW);
5458 }
5459 }
5460
5461 return 0;
5462 }
5463
5464 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5465 * sending probe req. This should be set long enough to hear probe responses
5466 * from more than one AP. */
5467 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5468 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5469
5470 /* For faster active scanning, scan will move to the next channel if fewer than
5471 * PLCP_QUIET_THRESH packets are heard on this channel within
5472 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5473 * time if it's a quiet channel (nothing responded to our probe, and there's
5474 * no other traffic).
5475 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5476 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5477 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5478
5479 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5480 * Must be set longer than active dwell time.
5481 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5482 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5483 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5484 #define IWL_PASSIVE_DWELL_BASE (100)
5485 #define IWL_CHANNEL_TUNE_TIME 5
5486
5487 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5488 {
5489 if (phymode == MODE_IEEE80211A)
5490 return IWL_ACTIVE_DWELL_TIME_52;
5491 else
5492 return IWL_ACTIVE_DWELL_TIME_24;
5493 }
5494
5495 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5496 {
5497 u16 active = iwl_get_active_dwell_time(priv, phymode);
5498 u16 passive = (phymode != MODE_IEEE80211A) ?
5499 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5500 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5501
5502 if (iwl_is_associated(priv)) {
5503 /* If we're associated, we clamp the maximum passive
5504 * dwell time to be 98% of the beacon interval (minus
5505 * 2 * channel tune time) */
5506 passive = priv->beacon_int;
5507 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5508 passive = IWL_PASSIVE_DWELL_BASE;
5509 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5510 }
5511
5512 if (passive <= active)
5513 passive = active + 1;
5514
5515 return passive;
5516 }
5517
5518 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5519 u8 is_active, u8 direct_mask,
5520 struct iwl_scan_channel *scan_ch)
5521 {
5522 const struct ieee80211_channel *channels = NULL;
5523 const struct ieee80211_hw_mode *hw_mode;
5524 const struct iwl_channel_info *ch_info;
5525 u16 passive_dwell = 0;
5526 u16 active_dwell = 0;
5527 int added, i;
5528
5529 hw_mode = iwl_get_hw_mode(priv, phymode);
5530 if (!hw_mode)
5531 return 0;
5532
5533 channels = hw_mode->channels;
5534
5535 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5536 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5537
5538 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5539 if (channels[i].chan ==
5540 le16_to_cpu(priv->active_rxon.channel)) {
5541 if (iwl_is_associated(priv)) {
5542 IWL_DEBUG_SCAN
5543 ("Skipping current channel %d\n",
5544 le16_to_cpu(priv->active_rxon.channel));
5545 continue;
5546 }
5547 } else if (priv->only_active_channel)
5548 continue;
5549
5550 scan_ch->channel = channels[i].chan;
5551
5552 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5553 if (!is_channel_valid(ch_info)) {
5554 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5555 scan_ch->channel);
5556 continue;
5557 }
5558
5559 if (!is_active || is_channel_passive(ch_info) ||
5560 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5561 scan_ch->type = 0; /* passive */
5562 else
5563 scan_ch->type = 1; /* active */
5564
5565 if (scan_ch->type & 1)
5566 scan_ch->type |= (direct_mask << 1);
5567
5568 if (is_channel_narrow(ch_info))
5569 scan_ch->type |= (1 << 7);
5570
5571 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5572 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5573
5574 /* Set power levels to defaults */
5575 scan_ch->tpc.dsp_atten = 110;
5576 /* scan_pwr_info->tpc.dsp_atten; */
5577
5578 /*scan_pwr_info->tpc.tx_gain; */
5579 if (phymode == MODE_IEEE80211A)
5580 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5581 else {
5582 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5583 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5584 * power level
5585 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5586 */
5587 }
5588
5589 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5590 scan_ch->channel,
5591 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5592 (scan_ch->type & 1) ?
5593 active_dwell : passive_dwell);
5594
5595 scan_ch++;
5596 added++;
5597 }
5598
5599 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5600 return added;
5601 }
5602
5603 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5604 {
5605 int i, j;
5606 for (i = 0; i < 3; i++) {
5607 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5608 for (j = 0; j < hw_mode->num_channels; j++)
5609 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5610 }
5611 }
5612
5613 static void iwl_init_hw_rates(struct iwl_priv *priv,
5614 struct ieee80211_rate *rates)
5615 {
5616 int i;
5617
5618 for (i = 0; i < IWL_RATE_COUNT; i++) {
5619 rates[i].rate = iwl_rates[i].ieee * 5;
5620 rates[i].val = i; /* Rate scaling will work on indexes */
5621 rates[i].val2 = i;
5622 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5623 /* Only OFDM have the bits-per-symbol set */
5624 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5625 rates[i].flags |= IEEE80211_RATE_OFDM;
5626 else {
5627 /*
5628 * If CCK 1M then set rate flag to CCK else CCK_2
5629 * which is CCK | PREAMBLE2
5630 */
5631 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5632 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5633 }
5634
5635 /* Set up which ones are basic rates... */
5636 if (IWL_BASIC_RATES_MASK & (1 << i))
5637 rates[i].flags |= IEEE80211_RATE_BASIC;
5638 }
5639
5640 iwl4965_init_hw_rates(priv, rates);
5641 }
5642
5643 /**
5644 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5645 */
5646 static int iwl_init_geos(struct iwl_priv *priv)
5647 {
5648 struct iwl_channel_info *ch;
5649 struct ieee80211_hw_mode *modes;
5650 struct ieee80211_channel *channels;
5651 struct ieee80211_channel *geo_ch;
5652 struct ieee80211_rate *rates;
5653 int i = 0;
5654 enum {
5655 A = 0,
5656 B = 1,
5657 G = 2,
5658 A_11N = 3,
5659 G_11N = 4,
5660 };
5661 int mode_count = 5;
5662
5663 if (priv->modes) {
5664 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5665 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5666 return 0;
5667 }
5668
5669 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5670 GFP_KERNEL);
5671 if (!modes)
5672 return -ENOMEM;
5673
5674 channels = kzalloc(sizeof(struct ieee80211_channel) *
5675 priv->channel_count, GFP_KERNEL);
5676 if (!channels) {
5677 kfree(modes);
5678 return -ENOMEM;
5679 }
5680
5681 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5682 GFP_KERNEL);
5683 if (!rates) {
5684 kfree(modes);
5685 kfree(channels);
5686 return -ENOMEM;
5687 }
5688
5689 /* 0 = 802.11a
5690 * 1 = 802.11b
5691 * 2 = 802.11g
5692 */
5693
5694 /* 5.2GHz channels start after the 2.4GHz channels */
5695 modes[A].mode = MODE_IEEE80211A;
5696 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5697 modes[A].rates = rates;
5698 modes[A].num_rates = 8; /* just OFDM */
5699 modes[A].rates = &rates[4];
5700 modes[A].num_channels = 0;
5701
5702 modes[B].mode = MODE_IEEE80211B;
5703 modes[B].channels = channels;
5704 modes[B].rates = rates;
5705 modes[B].num_rates = 4; /* just CCK */
5706 modes[B].num_channels = 0;
5707
5708 modes[G].mode = MODE_IEEE80211G;
5709 modes[G].channels = channels;
5710 modes[G].rates = rates;
5711 modes[G].num_rates = 12; /* OFDM & CCK */
5712 modes[G].num_channels = 0;
5713
5714 modes[G_11N].mode = MODE_IEEE80211G;
5715 modes[G_11N].channels = channels;
5716 modes[G_11N].num_rates = 13; /* OFDM & CCK */
5717 modes[G_11N].rates = rates;
5718 modes[G_11N].num_channels = 0;
5719
5720 modes[A_11N].mode = MODE_IEEE80211A;
5721 modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5722 modes[A_11N].rates = &rates[4];
5723 modes[A_11N].num_rates = 9; /* just OFDM */
5724 modes[A_11N].num_channels = 0;
5725
5726 priv->ieee_channels = channels;
5727 priv->ieee_rates = rates;
5728
5729 iwl_init_hw_rates(priv, rates);
5730
5731 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5732 ch = &priv->channel_info[i];
5733
5734 if (!is_channel_valid(ch)) {
5735 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5736 "skipping.\n",
5737 ch->channel, is_channel_a_band(ch) ?
5738 "5.2" : "2.4");
5739 continue;
5740 }
5741
5742 if (is_channel_a_band(ch)) {
5743 geo_ch = &modes[A].channels[modes[A].num_channels++];
5744 modes[A_11N].num_channels++;
5745 } else {
5746 geo_ch = &modes[B].channels[modes[B].num_channels++];
5747 modes[G].num_channels++;
5748 modes[G_11N].num_channels++;
5749 }
5750
5751 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5752 geo_ch->chan = ch->channel;
5753 geo_ch->power_level = ch->max_power_avg;
5754 geo_ch->antenna_max = 0xff;
5755
5756 if (is_channel_valid(ch)) {
5757 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5758 if (ch->flags & EEPROM_CHANNEL_IBSS)
5759 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5760
5761 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5762 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5763
5764 if (ch->flags & EEPROM_CHANNEL_RADAR)
5765 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5766
5767 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5768 priv->max_channel_txpower_limit =
5769 ch->max_power_avg;
5770 }
5771
5772 geo_ch->val = geo_ch->flag;
5773 }
5774
5775 if ((modes[A].num_channels == 0) && priv->is_abg) {
5776 printk(KERN_INFO DRV_NAME
5777 ": Incorrectly detected BG card as ABG. Please send "
5778 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5779 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5780 priv->is_abg = 0;
5781 }
5782
5783 printk(KERN_INFO DRV_NAME
5784 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5785 modes[G].num_channels, modes[A].num_channels);
5786
5787 /*
5788 * NOTE: We register these in preference of order -- the
5789 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5790 * a phymode based on rates or AP capabilities but seems to
5791 * configure it purely on if the channel being configured
5792 * is supported by a mode -- and the first match is taken
5793 */
5794
5795 if (modes[G].num_channels)
5796 ieee80211_register_hwmode(priv->hw, &modes[G]);
5797 if (modes[B].num_channels)
5798 ieee80211_register_hwmode(priv->hw, &modes[B]);
5799 if (modes[A].num_channels)
5800 ieee80211_register_hwmode(priv->hw, &modes[A]);
5801
5802 priv->modes = modes;
5803 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5804
5805 return 0;
5806 }
5807
5808 /******************************************************************************
5809 *
5810 * uCode download functions
5811 *
5812 ******************************************************************************/
5813
5814 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5815 {
5816 if (priv->ucode_code.v_addr != NULL) {
5817 pci_free_consistent(priv->pci_dev,
5818 priv->ucode_code.len,
5819 priv->ucode_code.v_addr,
5820 priv->ucode_code.p_addr);
5821 priv->ucode_code.v_addr = NULL;
5822 }
5823 if (priv->ucode_data.v_addr != NULL) {
5824 pci_free_consistent(priv->pci_dev,
5825 priv->ucode_data.len,
5826 priv->ucode_data.v_addr,
5827 priv->ucode_data.p_addr);
5828 priv->ucode_data.v_addr = NULL;
5829 }
5830 if (priv->ucode_data_backup.v_addr != NULL) {
5831 pci_free_consistent(priv->pci_dev,
5832 priv->ucode_data_backup.len,
5833 priv->ucode_data_backup.v_addr,
5834 priv->ucode_data_backup.p_addr);
5835 priv->ucode_data_backup.v_addr = NULL;
5836 }
5837 if (priv->ucode_init.v_addr != NULL) {
5838 pci_free_consistent(priv->pci_dev,
5839 priv->ucode_init.len,
5840 priv->ucode_init.v_addr,
5841 priv->ucode_init.p_addr);
5842 priv->ucode_init.v_addr = NULL;
5843 }
5844 if (priv->ucode_init_data.v_addr != NULL) {
5845 pci_free_consistent(priv->pci_dev,
5846 priv->ucode_init_data.len,
5847 priv->ucode_init_data.v_addr,
5848 priv->ucode_init_data.p_addr);
5849 priv->ucode_init_data.v_addr = NULL;
5850 }
5851 if (priv->ucode_boot.v_addr != NULL) {
5852 pci_free_consistent(priv->pci_dev,
5853 priv->ucode_boot.len,
5854 priv->ucode_boot.v_addr,
5855 priv->ucode_boot.p_addr);
5856 priv->ucode_boot.v_addr = NULL;
5857 }
5858 }
5859
5860 /**
5861 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5862 * looking at all data.
5863 */
5864 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5865 {
5866 u32 val;
5867 u32 save_len = len;
5868 int rc = 0;
5869 u32 errcnt;
5870
5871 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5872
5873 rc = iwl_grab_nic_access(priv);
5874 if (rc)
5875 return rc;
5876
5877 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5878
5879 errcnt = 0;
5880 for (; len > 0; len -= sizeof(u32), image++) {
5881 /* read data comes through single port, auto-incr addr */
5882 /* NOTE: Use the debugless read so we don't flood kernel log
5883 * if IWL_DL_IO is set */
5884 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5885 if (val != le32_to_cpu(*image)) {
5886 IWL_ERROR("uCode INST section is invalid at "
5887 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5888 save_len - len, val, le32_to_cpu(*image));
5889 rc = -EIO;
5890 errcnt++;
5891 if (errcnt >= 20)
5892 break;
5893 }
5894 }
5895
5896 iwl_release_nic_access(priv);
5897
5898 if (!errcnt)
5899 IWL_DEBUG_INFO
5900 ("ucode image in INSTRUCTION memory is good\n");
5901
5902 return rc;
5903 }
5904
5905
5906 /**
5907 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5908 * using sample data 100 bytes apart. If these sample points are good,
5909 * it's a pretty good bet that everything between them is good, too.
5910 */
5911 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5912 {
5913 u32 val;
5914 int rc = 0;
5915 u32 errcnt = 0;
5916 u32 i;
5917
5918 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5919
5920 rc = iwl_grab_nic_access(priv);
5921 if (rc)
5922 return rc;
5923
5924 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5925 /* read data comes through single port, auto-incr addr */
5926 /* NOTE: Use the debugless read so we don't flood kernel log
5927 * if IWL_DL_IO is set */
5928 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5929 i + RTC_INST_LOWER_BOUND);
5930 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5931 if (val != le32_to_cpu(*image)) {
5932 #if 0 /* Enable this if you want to see details */
5933 IWL_ERROR("uCode INST section is invalid at "
5934 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5935 i, val, *image);
5936 #endif
5937 rc = -EIO;
5938 errcnt++;
5939 if (errcnt >= 3)
5940 break;
5941 }
5942 }
5943
5944 iwl_release_nic_access(priv);
5945
5946 return rc;
5947 }
5948
5949
5950 /**
5951 * iwl_verify_ucode - determine which instruction image is in SRAM,
5952 * and verify its contents
5953 */
5954 static int iwl_verify_ucode(struct iwl_priv *priv)
5955 {
5956 __le32 *image;
5957 u32 len;
5958 int rc = 0;
5959
5960 /* Try bootstrap */
5961 image = (__le32 *)priv->ucode_boot.v_addr;
5962 len = priv->ucode_boot.len;
5963 rc = iwl_verify_inst_sparse(priv, image, len);
5964 if (rc == 0) {
5965 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5966 return 0;
5967 }
5968
5969 /* Try initialize */
5970 image = (__le32 *)priv->ucode_init.v_addr;
5971 len = priv->ucode_init.len;
5972 rc = iwl_verify_inst_sparse(priv, image, len);
5973 if (rc == 0) {
5974 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5975 return 0;
5976 }
5977
5978 /* Try runtime/protocol */
5979 image = (__le32 *)priv->ucode_code.v_addr;
5980 len = priv->ucode_code.len;
5981 rc = iwl_verify_inst_sparse(priv, image, len);
5982 if (rc == 0) {
5983 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5984 return 0;
5985 }
5986
5987 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5988
5989 /* Show first several data entries in instruction SRAM.
5990 * Selection of bootstrap image is arbitrary. */
5991 image = (__le32 *)priv->ucode_boot.v_addr;
5992 len = priv->ucode_boot.len;
5993 rc = iwl_verify_inst_full(priv, image, len);
5994
5995 return rc;
5996 }
5997
5998
5999 /* check contents of special bootstrap uCode SRAM */
6000 static int iwl_verify_bsm(struct iwl_priv *priv)
6001 {
6002 __le32 *image = priv->ucode_boot.v_addr;
6003 u32 len = priv->ucode_boot.len;
6004 u32 reg;
6005 u32 val;
6006
6007 IWL_DEBUG_INFO("Begin verify bsm\n");
6008
6009 /* verify BSM SRAM contents */
6010 val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
6011 for (reg = BSM_SRAM_LOWER_BOUND;
6012 reg < BSM_SRAM_LOWER_BOUND + len;
6013 reg += sizeof(u32), image ++) {
6014 val = iwl_read_prph(priv, reg);
6015 if (val != le32_to_cpu(*image)) {
6016 IWL_ERROR("BSM uCode verification failed at "
6017 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6018 BSM_SRAM_LOWER_BOUND,
6019 reg - BSM_SRAM_LOWER_BOUND, len,
6020 val, le32_to_cpu(*image));
6021 return -EIO;
6022 }
6023 }
6024
6025 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6026
6027 return 0;
6028 }
6029
6030 /**
6031 * iwl_load_bsm - Load bootstrap instructions
6032 *
6033 * BSM operation:
6034 *
6035 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6036 * in special SRAM that does not power down during RFKILL. When powering back
6037 * up after power-saving sleeps (or during initial uCode load), the BSM loads
6038 * the bootstrap program into the on-board processor, and starts it.
6039 *
6040 * The bootstrap program loads (via DMA) instructions and data for a new
6041 * program from host DRAM locations indicated by the host driver in the
6042 * BSM_DRAM_* registers. Once the new program is loaded, it starts
6043 * automatically.
6044 *
6045 * When initializing the NIC, the host driver points the BSM to the
6046 * "initialize" uCode image. This uCode sets up some internal data, then
6047 * notifies host via "initialize alive" that it is complete.
6048 *
6049 * The host then replaces the BSM_DRAM_* pointer values to point to the
6050 * normal runtime uCode instructions and a backup uCode data cache buffer
6051 * (filled initially with starting data values for the on-board processor),
6052 * then triggers the "initialize" uCode to load and launch the runtime uCode,
6053 * which begins normal operation.
6054 *
6055 * When doing a power-save shutdown, runtime uCode saves data SRAM into
6056 * the backup data cache in DRAM before SRAM is powered down.
6057 *
6058 * When powering back up, the BSM loads the bootstrap program. This reloads
6059 * the runtime uCode instructions and the backup data cache into SRAM,
6060 * and re-launches the runtime uCode from where it left off.
6061 */
6062 static int iwl_load_bsm(struct iwl_priv *priv)
6063 {
6064 __le32 *image = priv->ucode_boot.v_addr;
6065 u32 len = priv->ucode_boot.len;
6066 dma_addr_t pinst;
6067 dma_addr_t pdata;
6068 u32 inst_len;
6069 u32 data_len;
6070 int rc;
6071 int i;
6072 u32 done;
6073 u32 reg_offset;
6074
6075 IWL_DEBUG_INFO("Begin load bsm\n");
6076
6077 /* make sure bootstrap program is no larger than BSM's SRAM size */
6078 if (len > IWL_MAX_BSM_SIZE)
6079 return -EINVAL;
6080
6081 /* Tell bootstrap uCode where to find the "Initialize" uCode
6082 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6083 * NOTE: iwl_initialize_alive_start() will replace these values,
6084 * after the "initialize" uCode has run, to point to
6085 * runtime/protocol instructions and backup data cache. */
6086 pinst = priv->ucode_init.p_addr >> 4;
6087 pdata = priv->ucode_init_data.p_addr >> 4;
6088 inst_len = priv->ucode_init.len;
6089 data_len = priv->ucode_init_data.len;
6090
6091 rc = iwl_grab_nic_access(priv);
6092 if (rc)
6093 return rc;
6094
6095 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6096 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6097 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6098 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6099
6100 /* Fill BSM memory with bootstrap instructions */
6101 for (reg_offset = BSM_SRAM_LOWER_BOUND;
6102 reg_offset < BSM_SRAM_LOWER_BOUND + len;
6103 reg_offset += sizeof(u32), image++)
6104 _iwl_write_prph(priv, reg_offset,
6105 le32_to_cpu(*image));
6106
6107 rc = iwl_verify_bsm(priv);
6108 if (rc) {
6109 iwl_release_nic_access(priv);
6110 return rc;
6111 }
6112
6113 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6114 iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6115 iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
6116 RTC_INST_LOWER_BOUND);
6117 iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6118
6119 /* Load bootstrap code into instruction SRAM now,
6120 * to prepare to load "initialize" uCode */
6121 iwl_write_prph(priv, BSM_WR_CTRL_REG,
6122 BSM_WR_CTRL_REG_BIT_START);
6123
6124 /* Wait for load of bootstrap uCode to finish */
6125 for (i = 0; i < 100; i++) {
6126 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
6127 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6128 break;
6129 udelay(10);
6130 }
6131 if (i < 100)
6132 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6133 else {
6134 IWL_ERROR("BSM write did not complete!\n");
6135 return -EIO;
6136 }
6137
6138 /* Enable future boot loads whenever power management unit triggers it
6139 * (e.g. when powering back up after power-save shutdown) */
6140 iwl_write_prph(priv, BSM_WR_CTRL_REG,
6141 BSM_WR_CTRL_REG_BIT_START_EN);
6142
6143 iwl_release_nic_access(priv);
6144
6145 return 0;
6146 }
6147
6148 static void iwl_nic_start(struct iwl_priv *priv)
6149 {
6150 /* Remove all resets to allow NIC to operate */
6151 iwl_write32(priv, CSR_RESET, 0);
6152 }
6153
6154 /**
6155 * iwl_read_ucode - Read uCode images from disk file.
6156 *
6157 * Copy into buffers for card to fetch via bus-mastering
6158 */
6159 static int iwl_read_ucode(struct iwl_priv *priv)
6160 {
6161 struct iwl_ucode *ucode;
6162 int rc = 0;
6163 const struct firmware *ucode_raw;
6164 const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6165 u8 *src;
6166 size_t len;
6167 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6168
6169 /* Ask kernel firmware_class module to get the boot firmware off disk.
6170 * request_firmware() is synchronous, file is in memory on return. */
6171 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6172 if (rc < 0) {
6173 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6174 goto error;
6175 }
6176
6177 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6178 name, ucode_raw->size);
6179
6180 /* Make sure that we got at least our header! */
6181 if (ucode_raw->size < sizeof(*ucode)) {
6182 IWL_ERROR("File size way too small!\n");
6183 rc = -EINVAL;
6184 goto err_release;
6185 }
6186
6187 /* Data from ucode file: header followed by uCode images */
6188 ucode = (void *)ucode_raw->data;
6189
6190 ver = le32_to_cpu(ucode->ver);
6191 inst_size = le32_to_cpu(ucode->inst_size);
6192 data_size = le32_to_cpu(ucode->data_size);
6193 init_size = le32_to_cpu(ucode->init_size);
6194 init_data_size = le32_to_cpu(ucode->init_data_size);
6195 boot_size = le32_to_cpu(ucode->boot_size);
6196
6197 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6198 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6199 inst_size);
6200 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6201 data_size);
6202 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6203 init_size);
6204 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6205 init_data_size);
6206 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6207 boot_size);
6208
6209 /* Verify size of file vs. image size info in file's header */
6210 if (ucode_raw->size < sizeof(*ucode) +
6211 inst_size + data_size + init_size +
6212 init_data_size + boot_size) {
6213
6214 IWL_DEBUG_INFO("uCode file size %d too small\n",
6215 (int)ucode_raw->size);
6216 rc = -EINVAL;
6217 goto err_release;
6218 }
6219
6220 /* Verify that uCode images will fit in card's SRAM */
6221 if (inst_size > IWL_MAX_INST_SIZE) {
6222 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6223 (int)inst_size);
6224 rc = -EINVAL;
6225 goto err_release;
6226 }
6227
6228 if (data_size > IWL_MAX_DATA_SIZE) {
6229 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6230 (int)data_size);
6231 rc = -EINVAL;
6232 goto err_release;
6233 }
6234 if (init_size > IWL_MAX_INST_SIZE) {
6235 IWL_DEBUG_INFO
6236 ("uCode init instr len %d too large to fit in card\n",
6237 (int)init_size);
6238 rc = -EINVAL;
6239 goto err_release;
6240 }
6241 if (init_data_size > IWL_MAX_DATA_SIZE) {
6242 IWL_DEBUG_INFO
6243 ("uCode init data len %d too large to fit in card\n",
6244 (int)init_data_size);
6245 rc = -EINVAL;
6246 goto err_release;
6247 }
6248 if (boot_size > IWL_MAX_BSM_SIZE) {
6249 IWL_DEBUG_INFO
6250 ("uCode boot instr len %d too large to fit in bsm\n",
6251 (int)boot_size);
6252 rc = -EINVAL;
6253 goto err_release;
6254 }
6255
6256 /* Allocate ucode buffers for card's bus-master loading ... */
6257
6258 /* Runtime instructions and 2 copies of data:
6259 * 1) unmodified from disk
6260 * 2) backup cache for save/restore during power-downs */
6261 priv->ucode_code.len = inst_size;
6262 priv->ucode_code.v_addr =
6263 pci_alloc_consistent(priv->pci_dev,
6264 priv->ucode_code.len,
6265 &(priv->ucode_code.p_addr));
6266
6267 priv->ucode_data.len = data_size;
6268 priv->ucode_data.v_addr =
6269 pci_alloc_consistent(priv->pci_dev,
6270 priv->ucode_data.len,
6271 &(priv->ucode_data.p_addr));
6272
6273 priv->ucode_data_backup.len = data_size;
6274 priv->ucode_data_backup.v_addr =
6275 pci_alloc_consistent(priv->pci_dev,
6276 priv->ucode_data_backup.len,
6277 &(priv->ucode_data_backup.p_addr));
6278
6279
6280 /* Initialization instructions and data */
6281 priv->ucode_init.len = init_size;
6282 priv->ucode_init.v_addr =
6283 pci_alloc_consistent(priv->pci_dev,
6284 priv->ucode_init.len,
6285 &(priv->ucode_init.p_addr));
6286
6287 priv->ucode_init_data.len = init_data_size;
6288 priv->ucode_init_data.v_addr =
6289 pci_alloc_consistent(priv->pci_dev,
6290 priv->ucode_init_data.len,
6291 &(priv->ucode_init_data.p_addr));
6292
6293 /* Bootstrap (instructions only, no data) */
6294 priv->ucode_boot.len = boot_size;
6295 priv->ucode_boot.v_addr =
6296 pci_alloc_consistent(priv->pci_dev,
6297 priv->ucode_boot.len,
6298 &(priv->ucode_boot.p_addr));
6299
6300 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6301 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6302 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6303 goto err_pci_alloc;
6304
6305 /* Copy images into buffers for card's bus-master reads ... */
6306
6307 /* Runtime instructions (first block of data in file) */
6308 src = &ucode->data[0];
6309 len = priv->ucode_code.len;
6310 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6311 (int)len);
6312 memcpy(priv->ucode_code.v_addr, src, len);
6313 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6314 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6315
6316 /* Runtime data (2nd block)
6317 * NOTE: Copy into backup buffer will be done in iwl_up() */
6318 src = &ucode->data[inst_size];
6319 len = priv->ucode_data.len;
6320 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6321 (int)len);
6322 memcpy(priv->ucode_data.v_addr, src, len);
6323 memcpy(priv->ucode_data_backup.v_addr, src, len);
6324
6325 /* Initialization instructions (3rd block) */
6326 if (init_size) {
6327 src = &ucode->data[inst_size + data_size];
6328 len = priv->ucode_init.len;
6329 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6330 (int)len);
6331 memcpy(priv->ucode_init.v_addr, src, len);
6332 }
6333
6334 /* Initialization data (4th block) */
6335 if (init_data_size) {
6336 src = &ucode->data[inst_size + data_size + init_size];
6337 len = priv->ucode_init_data.len;
6338 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6339 (int)len);
6340 memcpy(priv->ucode_init_data.v_addr, src, len);
6341 }
6342
6343 /* Bootstrap instructions (5th block) */
6344 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6345 len = priv->ucode_boot.len;
6346 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6347 (int)len);
6348 memcpy(priv->ucode_boot.v_addr, src, len);
6349
6350 /* We have our copies now, allow OS release its copies */
6351 release_firmware(ucode_raw);
6352 return 0;
6353
6354 err_pci_alloc:
6355 IWL_ERROR("failed to allocate pci memory\n");
6356 rc = -ENOMEM;
6357 iwl_dealloc_ucode_pci(priv);
6358
6359 err_release:
6360 release_firmware(ucode_raw);
6361
6362 error:
6363 return rc;
6364 }
6365
6366
6367 /**
6368 * iwl_set_ucode_ptrs - Set uCode address location
6369 *
6370 * Tell initialization uCode where to find runtime uCode.
6371 *
6372 * BSM registers initially contain pointers to initialization uCode.
6373 * We need to replace them to load runtime uCode inst and data,
6374 * and to save runtime data when powering down.
6375 */
6376 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6377 {
6378 dma_addr_t pinst;
6379 dma_addr_t pdata;
6380 int rc = 0;
6381 unsigned long flags;
6382
6383 /* bits 35:4 for 4965 */
6384 pinst = priv->ucode_code.p_addr >> 4;
6385 pdata = priv->ucode_data_backup.p_addr >> 4;
6386
6387 spin_lock_irqsave(&priv->lock, flags);
6388 rc = iwl_grab_nic_access(priv);
6389 if (rc) {
6390 spin_unlock_irqrestore(&priv->lock, flags);
6391 return rc;
6392 }
6393
6394 /* Tell bootstrap uCode where to find image to load */
6395 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6396 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6397 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6398 priv->ucode_data.len);
6399
6400 /* Inst bytecount must be last to set up, bit 31 signals uCode
6401 * that all new ptr/size info is in place */
6402 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6403 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6404
6405 iwl_release_nic_access(priv);
6406
6407 spin_unlock_irqrestore(&priv->lock, flags);
6408
6409 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6410
6411 return rc;
6412 }
6413
6414 /**
6415 * iwl_init_alive_start - Called after REPLY_ALIVE notification received
6416 *
6417 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6418 *
6419 * The 4965 "initialize" ALIVE reply contains calibration data for:
6420 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6421 * (3945 does not contain this data).
6422 *
6423 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6424 */
6425 static void iwl_init_alive_start(struct iwl_priv *priv)
6426 {
6427 /* Check alive response for "valid" sign from uCode */
6428 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6429 /* We had an error bringing up the hardware, so take it
6430 * all the way back down so we can try again */
6431 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6432 goto restart;
6433 }
6434
6435 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6436 * This is a paranoid check, because we would not have gotten the
6437 * "initialize" alive if code weren't properly loaded. */
6438 if (iwl_verify_ucode(priv)) {
6439 /* Runtime instruction load was bad;
6440 * take it all the way back down so we can try again */
6441 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6442 goto restart;
6443 }
6444
6445 /* Calculate temperature */
6446 priv->temperature = iwl4965_get_temperature(priv);
6447
6448 /* Send pointers to protocol/runtime uCode image ... init code will
6449 * load and launch runtime uCode, which will send us another "Alive"
6450 * notification. */
6451 IWL_DEBUG_INFO("Initialization Alive received.\n");
6452 if (iwl_set_ucode_ptrs(priv)) {
6453 /* Runtime instruction load won't happen;
6454 * take it all the way back down so we can try again */
6455 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6456 goto restart;
6457 }
6458 return;
6459
6460 restart:
6461 queue_work(priv->workqueue, &priv->restart);
6462 }
6463
6464
6465 /**
6466 * iwl_alive_start - called after REPLY_ALIVE notification received
6467 * from protocol/runtime uCode (initialization uCode's
6468 * Alive gets handled by iwl_init_alive_start()).
6469 */
6470 static void iwl_alive_start(struct iwl_priv *priv)
6471 {
6472 int rc = 0;
6473
6474 IWL_DEBUG_INFO("Runtime Alive received.\n");
6475
6476 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6477 /* We had an error bringing up the hardware, so take it
6478 * all the way back down so we can try again */
6479 IWL_DEBUG_INFO("Alive failed.\n");
6480 goto restart;
6481 }
6482
6483 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6484 * This is a paranoid check, because we would not have gotten the
6485 * "runtime" alive if code weren't properly loaded. */
6486 if (iwl_verify_ucode(priv)) {
6487 /* Runtime instruction load was bad;
6488 * take it all the way back down so we can try again */
6489 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6490 goto restart;
6491 }
6492
6493 iwl_clear_stations_table(priv);
6494
6495 rc = iwl4965_alive_notify(priv);
6496 if (rc) {
6497 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6498 rc);
6499 goto restart;
6500 }
6501
6502 /* After the ALIVE response, we can process host commands */
6503 set_bit(STATUS_ALIVE, &priv->status);
6504
6505 /* Clear out the uCode error bit if it is set */
6506 clear_bit(STATUS_FW_ERROR, &priv->status);
6507
6508 rc = iwl_init_channel_map(priv);
6509 if (rc) {
6510 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6511 return;
6512 }
6513
6514 iwl_init_geos(priv);
6515
6516 if (iwl_is_rfkill(priv))
6517 return;
6518
6519 if (!priv->mac80211_registered) {
6520 /* Unlock so any user space entry points can call back into
6521 * the driver without a deadlock... */
6522 mutex_unlock(&priv->mutex);
6523 iwl_rate_control_register(priv->hw);
6524 rc = ieee80211_register_hw(priv->hw);
6525 priv->hw->conf.beacon_int = 100;
6526 mutex_lock(&priv->mutex);
6527
6528 if (rc) {
6529 iwl_rate_control_unregister(priv->hw);
6530 IWL_ERROR("Failed to register network "
6531 "device (error %d)\n", rc);
6532 return;
6533 }
6534
6535 priv->mac80211_registered = 1;
6536
6537 iwl_reset_channel_flag(priv);
6538 } else
6539 ieee80211_start_queues(priv->hw);
6540
6541 priv->active_rate = priv->rates_mask;
6542 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6543
6544 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6545
6546 if (iwl_is_associated(priv)) {
6547 struct iwl_rxon_cmd *active_rxon =
6548 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6549
6550 memcpy(&priv->staging_rxon, &priv->active_rxon,
6551 sizeof(priv->staging_rxon));
6552 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6553 } else {
6554 /* Initialize our rx_config data */
6555 iwl_connection_init_rx_config(priv);
6556 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6557 }
6558
6559 /* Configure BT coexistence */
6560 iwl_send_bt_config(priv);
6561
6562 /* Configure the adapter for unassociated operation */
6563 iwl_commit_rxon(priv);
6564
6565 /* At this point, the NIC is initialized and operational */
6566 priv->notif_missed_beacons = 0;
6567 set_bit(STATUS_READY, &priv->status);
6568
6569 iwl4965_rf_kill_ct_config(priv);
6570 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6571
6572 if (priv->error_recovering)
6573 iwl_error_recovery(priv);
6574
6575 return;
6576
6577 restart:
6578 queue_work(priv->workqueue, &priv->restart);
6579 }
6580
6581 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6582
6583 static void __iwl_down(struct iwl_priv *priv)
6584 {
6585 unsigned long flags;
6586 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6587 struct ieee80211_conf *conf = NULL;
6588
6589 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6590
6591 conf = ieee80211_get_hw_conf(priv->hw);
6592
6593 if (!exit_pending)
6594 set_bit(STATUS_EXIT_PENDING, &priv->status);
6595
6596 iwl_clear_stations_table(priv);
6597
6598 /* Unblock any waiting calls */
6599 wake_up_interruptible_all(&priv->wait_command_queue);
6600
6601 /* Wipe out the EXIT_PENDING status bit if we are not actually
6602 * exiting the module */
6603 if (!exit_pending)
6604 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6605
6606 /* stop and reset the on-board processor */
6607 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6608
6609 /* tell the device to stop sending interrupts */
6610 iwl_disable_interrupts(priv);
6611
6612 if (priv->mac80211_registered)
6613 ieee80211_stop_queues(priv->hw);
6614
6615 /* If we have not previously called iwl_init() then
6616 * clear all bits but the RF Kill and SUSPEND bits and return */
6617 if (!iwl_is_init(priv)) {
6618 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6619 STATUS_RF_KILL_HW |
6620 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6621 STATUS_RF_KILL_SW |
6622 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6623 STATUS_IN_SUSPEND;
6624 goto exit;
6625 }
6626
6627 /* ...otherwise clear out all the status bits but the RF Kill and
6628 * SUSPEND bits and continue taking the NIC down. */
6629 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6630 STATUS_RF_KILL_HW |
6631 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6632 STATUS_RF_KILL_SW |
6633 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6634 STATUS_IN_SUSPEND |
6635 test_bit(STATUS_FW_ERROR, &priv->status) <<
6636 STATUS_FW_ERROR;
6637
6638 spin_lock_irqsave(&priv->lock, flags);
6639 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6640 spin_unlock_irqrestore(&priv->lock, flags);
6641
6642 iwl_hw_txq_ctx_stop(priv);
6643 iwl_hw_rxq_stop(priv);
6644
6645 spin_lock_irqsave(&priv->lock, flags);
6646 if (!iwl_grab_nic_access(priv)) {
6647 iwl_write_prph(priv, APMG_CLK_DIS_REG,
6648 APMG_CLK_VAL_DMA_CLK_RQT);
6649 iwl_release_nic_access(priv);
6650 }
6651 spin_unlock_irqrestore(&priv->lock, flags);
6652
6653 udelay(5);
6654
6655 iwl_hw_nic_stop_master(priv);
6656 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6657 iwl_hw_nic_reset(priv);
6658
6659 exit:
6660 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6661
6662 if (priv->ibss_beacon)
6663 dev_kfree_skb(priv->ibss_beacon);
6664 priv->ibss_beacon = NULL;
6665
6666 /* clear out any free frames */
6667 iwl_clear_free_frames(priv);
6668 }
6669
6670 static void iwl_down(struct iwl_priv *priv)
6671 {
6672 mutex_lock(&priv->mutex);
6673 __iwl_down(priv);
6674 mutex_unlock(&priv->mutex);
6675
6676 iwl_cancel_deferred_work(priv);
6677 }
6678
6679 #define MAX_HW_RESTARTS 5
6680
6681 static int __iwl_up(struct iwl_priv *priv)
6682 {
6683 DECLARE_MAC_BUF(mac);
6684 int rc, i;
6685 u32 hw_rf_kill = 0;
6686
6687 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6688 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6689 return -EIO;
6690 }
6691
6692 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6693 IWL_WARNING("Radio disabled by SW RF kill (module "
6694 "parameter)\n");
6695 return 0;
6696 }
6697
6698 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6699 IWL_ERROR("ucode not available for device bringup\n");
6700 return -EIO;
6701 }
6702
6703 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6704
6705 rc = iwl_hw_nic_init(priv);
6706 if (rc) {
6707 IWL_ERROR("Unable to int nic\n");
6708 return rc;
6709 }
6710
6711 /* make sure rfkill handshake bits are cleared */
6712 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6713 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6714 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6715
6716 /* clear (again), then enable host interrupts */
6717 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6718 iwl_enable_interrupts(priv);
6719
6720 /* really make sure rfkill handshake bits are cleared */
6721 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6722 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6723
6724 /* Copy original ucode data image from disk into backup cache.
6725 * This will be used to initialize the on-board processor's
6726 * data SRAM for a clean start when the runtime program first loads. */
6727 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6728 priv->ucode_data.len);
6729
6730 /* If platform's RF_KILL switch is set to KILL,
6731 * wait for BIT_INT_RF_KILL interrupt before loading uCode
6732 * and getting things started */
6733 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6734 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6735 hw_rf_kill = 1;
6736
6737 if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6738 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6739 return 0;
6740 }
6741
6742 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6743
6744 iwl_clear_stations_table(priv);
6745
6746 /* load bootstrap state machine,
6747 * load bootstrap program into processor's memory,
6748 * prepare to load the "initialize" uCode */
6749 rc = iwl_load_bsm(priv);
6750
6751 if (rc) {
6752 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6753 continue;
6754 }
6755
6756 /* start card; "initialize" will load runtime ucode */
6757 iwl_nic_start(priv);
6758
6759 /* MAC Address location in EEPROM same for 3945/4965 */
6760 get_eeprom_mac(priv, priv->mac_addr);
6761 IWL_DEBUG_INFO("MAC address: %s\n",
6762 print_mac(mac, priv->mac_addr));
6763
6764 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6765
6766 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6767
6768 return 0;
6769 }
6770
6771 set_bit(STATUS_EXIT_PENDING, &priv->status);
6772 __iwl_down(priv);
6773
6774 /* tried to restart and config the device for as long as our
6775 * patience could withstand */
6776 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6777 return -EIO;
6778 }
6779
6780
6781 /*****************************************************************************
6782 *
6783 * Workqueue callbacks
6784 *
6785 *****************************************************************************/
6786
6787 static void iwl_bg_init_alive_start(struct work_struct *data)
6788 {
6789 struct iwl_priv *priv =
6790 container_of(data, struct iwl_priv, init_alive_start.work);
6791
6792 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6793 return;
6794
6795 mutex_lock(&priv->mutex);
6796 iwl_init_alive_start(priv);
6797 mutex_unlock(&priv->mutex);
6798 }
6799
6800 static void iwl_bg_alive_start(struct work_struct *data)
6801 {
6802 struct iwl_priv *priv =
6803 container_of(data, struct iwl_priv, alive_start.work);
6804
6805 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6806 return;
6807
6808 mutex_lock(&priv->mutex);
6809 iwl_alive_start(priv);
6810 mutex_unlock(&priv->mutex);
6811 }
6812
6813 static void iwl_bg_rf_kill(struct work_struct *work)
6814 {
6815 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6816
6817 wake_up_interruptible(&priv->wait_command_queue);
6818
6819 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6820 return;
6821
6822 mutex_lock(&priv->mutex);
6823
6824 if (!iwl_is_rfkill(priv)) {
6825 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6826 "HW and/or SW RF Kill no longer active, restarting "
6827 "device\n");
6828 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6829 queue_work(priv->workqueue, &priv->restart);
6830 } else {
6831
6832 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6833 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6834 "disabled by SW switch\n");
6835 else
6836 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6837 "Kill switch must be turned off for "
6838 "wireless networking to work.\n");
6839 }
6840 mutex_unlock(&priv->mutex);
6841 }
6842
6843 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6844
6845 static void iwl_bg_scan_check(struct work_struct *data)
6846 {
6847 struct iwl_priv *priv =
6848 container_of(data, struct iwl_priv, scan_check.work);
6849
6850 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6851 return;
6852
6853 mutex_lock(&priv->mutex);
6854 if (test_bit(STATUS_SCANNING, &priv->status) ||
6855 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6856 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6857 "Scan completion watchdog resetting adapter (%dms)\n",
6858 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6859
6860 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6861 iwl_send_scan_abort(priv);
6862 }
6863 mutex_unlock(&priv->mutex);
6864 }
6865
6866 static void iwl_bg_request_scan(struct work_struct *data)
6867 {
6868 struct iwl_priv *priv =
6869 container_of(data, struct iwl_priv, request_scan);
6870 struct iwl_host_cmd cmd = {
6871 .id = REPLY_SCAN_CMD,
6872 .len = sizeof(struct iwl_scan_cmd),
6873 .meta.flags = CMD_SIZE_HUGE,
6874 };
6875 int rc = 0;
6876 struct iwl_scan_cmd *scan;
6877 struct ieee80211_conf *conf = NULL;
6878 u8 direct_mask;
6879 int phymode;
6880
6881 conf = ieee80211_get_hw_conf(priv->hw);
6882
6883 mutex_lock(&priv->mutex);
6884
6885 if (!iwl_is_ready(priv)) {
6886 IWL_WARNING("request scan called when driver not ready.\n");
6887 goto done;
6888 }
6889
6890 /* Make sure the scan wasn't cancelled before this queued work
6891 * was given the chance to run... */
6892 if (!test_bit(STATUS_SCANNING, &priv->status))
6893 goto done;
6894
6895 /* This should never be called or scheduled if there is currently
6896 * a scan active in the hardware. */
6897 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6898 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6899 "Ignoring second request.\n");
6900 rc = -EIO;
6901 goto done;
6902 }
6903
6904 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6905 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6906 goto done;
6907 }
6908
6909 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6910 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6911 goto done;
6912 }
6913
6914 if (iwl_is_rfkill(priv)) {
6915 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6916 goto done;
6917 }
6918
6919 if (!test_bit(STATUS_READY, &priv->status)) {
6920 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6921 goto done;
6922 }
6923
6924 if (!priv->scan_bands) {
6925 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6926 goto done;
6927 }
6928
6929 if (!priv->scan) {
6930 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6931 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6932 if (!priv->scan) {
6933 rc = -ENOMEM;
6934 goto done;
6935 }
6936 }
6937 scan = priv->scan;
6938 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6939
6940 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6941 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6942
6943 if (iwl_is_associated(priv)) {
6944 u16 interval = 0;
6945 u32 extra;
6946 u32 suspend_time = 100;
6947 u32 scan_suspend_time = 100;
6948 unsigned long flags;
6949
6950 IWL_DEBUG_INFO("Scanning while associated...\n");
6951
6952 spin_lock_irqsave(&priv->lock, flags);
6953 interval = priv->beacon_int;
6954 spin_unlock_irqrestore(&priv->lock, flags);
6955
6956 scan->suspend_time = 0;
6957 scan->max_out_time = cpu_to_le32(200 * 1024);
6958 if (!interval)
6959 interval = suspend_time;
6960
6961 extra = (suspend_time / interval) << 22;
6962 scan_suspend_time = (extra |
6963 ((suspend_time % interval) * 1024));
6964 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6965 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6966 scan_suspend_time, interval);
6967 }
6968
6969 /* We should add the ability for user to lock to PASSIVE ONLY */
6970 if (priv->one_direct_scan) {
6971 IWL_DEBUG_SCAN
6972 ("Kicking off one direct scan for '%s'\n",
6973 iwl_escape_essid(priv->direct_ssid,
6974 priv->direct_ssid_len));
6975 scan->direct_scan[0].id = WLAN_EID_SSID;
6976 scan->direct_scan[0].len = priv->direct_ssid_len;
6977 memcpy(scan->direct_scan[0].ssid,
6978 priv->direct_ssid, priv->direct_ssid_len);
6979 direct_mask = 1;
6980 } else if (!iwl_is_associated(priv) && priv->essid_len) {
6981 scan->direct_scan[0].id = WLAN_EID_SSID;
6982 scan->direct_scan[0].len = priv->essid_len;
6983 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6984 direct_mask = 1;
6985 } else
6986 direct_mask = 0;
6987
6988 /* We don't build a direct scan probe request; the uCode will do
6989 * that based on the direct_mask added to each channel entry */
6990 scan->tx_cmd.len = cpu_to_le16(
6991 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6992 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6993 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6994 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6995 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6996
6997 /* flags + rate selection */
6998
6999 scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7000
7001 switch (priv->scan_bands) {
7002 case 2:
7003 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7004 scan->tx_cmd.rate_n_flags =
7005 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7006 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7007
7008 scan->good_CRC_th = 0;
7009 phymode = MODE_IEEE80211G;
7010 break;
7011
7012 case 1:
7013 scan->tx_cmd.rate_n_flags =
7014 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7015 RATE_MCS_ANT_B_MSK);
7016 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7017 phymode = MODE_IEEE80211A;
7018 break;
7019
7020 default:
7021 IWL_WARNING("Invalid scan band count\n");
7022 goto done;
7023 }
7024
7025 /* select Rx chains */
7026
7027 /* Force use of chains B and C (0x6) for scan Rx.
7028 * Avoid A (0x1) because of its off-channel reception on A-band.
7029 * MIMO is not used here, but value is required to make uCode happy. */
7030 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7031 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7032 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7033 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7034
7035 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7036 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7037
7038 if (direct_mask)
7039 IWL_DEBUG_SCAN
7040 ("Initiating direct scan for %s.\n",
7041 iwl_escape_essid(priv->essid, priv->essid_len));
7042 else
7043 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7044
7045 scan->channel_count =
7046 iwl_get_channels_for_scan(
7047 priv, phymode, 1, /* active */
7048 direct_mask,
7049 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7050
7051 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7052 scan->channel_count * sizeof(struct iwl_scan_channel);
7053 cmd.data = scan;
7054 scan->len = cpu_to_le16(cmd.len);
7055
7056 set_bit(STATUS_SCAN_HW, &priv->status);
7057 rc = iwl_send_cmd_sync(priv, &cmd);
7058 if (rc)
7059 goto done;
7060
7061 queue_delayed_work(priv->workqueue, &priv->scan_check,
7062 IWL_SCAN_CHECK_WATCHDOG);
7063
7064 mutex_unlock(&priv->mutex);
7065 return;
7066
7067 done:
7068 /* inform mac80211 scan aborted */
7069 queue_work(priv->workqueue, &priv->scan_completed);
7070 mutex_unlock(&priv->mutex);
7071 }
7072
7073 static void iwl_bg_up(struct work_struct *data)
7074 {
7075 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7076
7077 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7078 return;
7079
7080 mutex_lock(&priv->mutex);
7081 __iwl_up(priv);
7082 mutex_unlock(&priv->mutex);
7083 }
7084
7085 static void iwl_bg_restart(struct work_struct *data)
7086 {
7087 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7088
7089 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7090 return;
7091
7092 iwl_down(priv);
7093 queue_work(priv->workqueue, &priv->up);
7094 }
7095
7096 static void iwl_bg_rx_replenish(struct work_struct *data)
7097 {
7098 struct iwl_priv *priv =
7099 container_of(data, struct iwl_priv, rx_replenish);
7100
7101 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7102 return;
7103
7104 mutex_lock(&priv->mutex);
7105 iwl_rx_replenish(priv);
7106 mutex_unlock(&priv->mutex);
7107 }
7108
7109 static void iwl_bg_post_associate(struct work_struct *data)
7110 {
7111 struct iwl_priv *priv = container_of(data, struct iwl_priv,
7112 post_associate.work);
7113
7114 int rc = 0;
7115 struct ieee80211_conf *conf = NULL;
7116 DECLARE_MAC_BUF(mac);
7117
7118 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7119 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7120 return;
7121 }
7122
7123 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7124 priv->assoc_id,
7125 print_mac(mac, priv->active_rxon.bssid_addr));
7126
7127
7128 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7129 return;
7130
7131 mutex_lock(&priv->mutex);
7132
7133 if (!priv->interface_id || !priv->is_open) {
7134 mutex_unlock(&priv->mutex);
7135 return;
7136 }
7137 iwl_scan_cancel_timeout(priv, 200);
7138
7139 conf = ieee80211_get_hw_conf(priv->hw);
7140
7141 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7142 iwl_commit_rxon(priv);
7143
7144 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7145 iwl_setup_rxon_timing(priv);
7146 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7147 sizeof(priv->rxon_timing), &priv->rxon_timing);
7148 if (rc)
7149 IWL_WARNING("REPLY_RXON_TIMING failed - "
7150 "Attempting to continue.\n");
7151
7152 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7153
7154 #ifdef CONFIG_IWLWIFI_HT
7155 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7156 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7157 else {
7158 priv->active_rate_ht[0] = 0;
7159 priv->active_rate_ht[1] = 0;
7160 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7161 }
7162 #endif /* CONFIG_IWLWIFI_HT*/
7163 iwl4965_set_rxon_chain(priv);
7164 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7165
7166 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7167 priv->assoc_id, priv->beacon_int);
7168
7169 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7170 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7171 else
7172 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7173
7174 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7175 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7176 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7177 else
7178 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7179
7180 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7181 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7182
7183 }
7184
7185 iwl_commit_rxon(priv);
7186
7187 switch (priv->iw_mode) {
7188 case IEEE80211_IF_TYPE_STA:
7189 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7190 break;
7191
7192 case IEEE80211_IF_TYPE_IBSS:
7193
7194 /* clear out the station table */
7195 iwl_clear_stations_table(priv);
7196
7197 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7198 iwl_rxon_add_station(priv, priv->bssid, 0);
7199 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7200 iwl_send_beacon_cmd(priv);
7201
7202 break;
7203
7204 default:
7205 IWL_ERROR("%s Should not be called in %d mode\n",
7206 __FUNCTION__, priv->iw_mode);
7207 break;
7208 }
7209
7210 iwl_sequence_reset(priv);
7211
7212 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7213 /* Enable Rx differential gain and sensitivity calibrations */
7214 iwl4965_chain_noise_reset(priv);
7215 priv->start_calib = 1;
7216 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7217
7218 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7219 priv->assoc_station_added = 1;
7220
7221 #ifdef CONFIG_IWLWIFI_QOS
7222 iwl_activate_qos(priv, 0);
7223 #endif /* CONFIG_IWLWIFI_QOS */
7224 mutex_unlock(&priv->mutex);
7225 }
7226
7227 static void iwl_bg_abort_scan(struct work_struct *work)
7228 {
7229 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
7230
7231 if (!iwl_is_ready(priv))
7232 return;
7233
7234 mutex_lock(&priv->mutex);
7235
7236 set_bit(STATUS_SCAN_ABORTING, &priv->status);
7237 iwl_send_scan_abort(priv);
7238
7239 mutex_unlock(&priv->mutex);
7240 }
7241
7242 static void iwl_bg_scan_completed(struct work_struct *work)
7243 {
7244 struct iwl_priv *priv =
7245 container_of(work, struct iwl_priv, scan_completed);
7246
7247 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7248
7249 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7250 return;
7251
7252 ieee80211_scan_completed(priv->hw);
7253
7254 /* Since setting the TXPOWER may have been deferred while
7255 * performing the scan, fire one off */
7256 mutex_lock(&priv->mutex);
7257 iwl_hw_reg_send_txpower(priv);
7258 mutex_unlock(&priv->mutex);
7259 }
7260
7261 /*****************************************************************************
7262 *
7263 * mac80211 entry point functions
7264 *
7265 *****************************************************************************/
7266
7267 static int iwl_mac_start(struct ieee80211_hw *hw)
7268 {
7269 struct iwl_priv *priv = hw->priv;
7270
7271 IWL_DEBUG_MAC80211("enter\n");
7272
7273 /* we should be verifying the device is ready to be opened */
7274 mutex_lock(&priv->mutex);
7275
7276 priv->is_open = 1;
7277
7278 if (!iwl_is_rfkill(priv))
7279 ieee80211_start_queues(priv->hw);
7280
7281 mutex_unlock(&priv->mutex);
7282 IWL_DEBUG_MAC80211("leave\n");
7283 return 0;
7284 }
7285
7286 static void iwl_mac_stop(struct ieee80211_hw *hw)
7287 {
7288 struct iwl_priv *priv = hw->priv;
7289
7290 IWL_DEBUG_MAC80211("enter\n");
7291
7292
7293 mutex_lock(&priv->mutex);
7294 /* stop mac, cancel any scan request and clear
7295 * RXON_FILTER_ASSOC_MSK BIT
7296 */
7297 priv->is_open = 0;
7298 iwl_scan_cancel_timeout(priv, 100);
7299 cancel_delayed_work(&priv->post_associate);
7300 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7301 iwl_commit_rxon(priv);
7302 mutex_unlock(&priv->mutex);
7303
7304 IWL_DEBUG_MAC80211("leave\n");
7305 }
7306
7307 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7308 struct ieee80211_tx_control *ctl)
7309 {
7310 struct iwl_priv *priv = hw->priv;
7311
7312 IWL_DEBUG_MAC80211("enter\n");
7313
7314 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7315 IWL_DEBUG_MAC80211("leave - monitor\n");
7316 return -1;
7317 }
7318
7319 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7320 ctl->tx_rate);
7321
7322 if (iwl_tx_skb(priv, skb, ctl))
7323 dev_kfree_skb_any(skb);
7324
7325 IWL_DEBUG_MAC80211("leave\n");
7326 return 0;
7327 }
7328
7329 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7330 struct ieee80211_if_init_conf *conf)
7331 {
7332 struct iwl_priv *priv = hw->priv;
7333 unsigned long flags;
7334 DECLARE_MAC_BUF(mac);
7335
7336 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7337
7338 if (priv->interface_id) {
7339 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7340 return 0;
7341 }
7342
7343 spin_lock_irqsave(&priv->lock, flags);
7344 priv->interface_id = conf->if_id;
7345
7346 spin_unlock_irqrestore(&priv->lock, flags);
7347
7348 mutex_lock(&priv->mutex);
7349
7350 if (conf->mac_addr) {
7351 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7352 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7353 }
7354 iwl_set_mode(priv, conf->type);
7355
7356 IWL_DEBUG_MAC80211("leave\n");
7357 mutex_unlock(&priv->mutex);
7358
7359 return 0;
7360 }
7361
7362 /**
7363 * iwl_mac_config - mac80211 config callback
7364 *
7365 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7366 * be set inappropriately and the driver currently sets the hardware up to
7367 * use it whenever needed.
7368 */
7369 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7370 {
7371 struct iwl_priv *priv = hw->priv;
7372 const struct iwl_channel_info *ch_info;
7373 unsigned long flags;
7374
7375 mutex_lock(&priv->mutex);
7376 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7377
7378 if (!iwl_is_ready(priv)) {
7379 IWL_DEBUG_MAC80211("leave - not ready\n");
7380 mutex_unlock(&priv->mutex);
7381 return -EIO;
7382 }
7383
7384 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7385 * what is exposed through include/ declarations */
7386 if (unlikely(!iwl_param_disable_hw_scan &&
7387 test_bit(STATUS_SCANNING, &priv->status))) {
7388 IWL_DEBUG_MAC80211("leave - scanning\n");
7389 mutex_unlock(&priv->mutex);
7390 return 0;
7391 }
7392
7393 spin_lock_irqsave(&priv->lock, flags);
7394
7395 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7396 if (!is_channel_valid(ch_info)) {
7397 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7398 conf->channel, conf->phymode);
7399 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7400 spin_unlock_irqrestore(&priv->lock, flags);
7401 mutex_unlock(&priv->mutex);
7402 return -EINVAL;
7403 }
7404
7405 #ifdef CONFIG_IWLWIFI_HT
7406 /* if we are switching fron ht to 2.4 clear flags
7407 * from any ht related info since 2.4 does not
7408 * support ht */
7409 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7410 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7411 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7412 #endif
7413 )
7414 priv->staging_rxon.flags = 0;
7415 #endif /* CONFIG_IWLWIFI_HT */
7416
7417 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7418
7419 iwl_set_flags_for_phymode(priv, conf->phymode);
7420
7421 /* The list of supported rates and rate mask can be different
7422 * for each phymode; since the phymode may have changed, reset
7423 * the rate mask to what mac80211 lists */
7424 iwl_set_rate(priv);
7425
7426 spin_unlock_irqrestore(&priv->lock, flags);
7427
7428 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7429 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7430 iwl_hw_channel_switch(priv, conf->channel);
7431 mutex_unlock(&priv->mutex);
7432 return 0;
7433 }
7434 #endif
7435
7436 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7437
7438 if (!conf->radio_enabled) {
7439 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7440 mutex_unlock(&priv->mutex);
7441 return 0;
7442 }
7443
7444 if (iwl_is_rfkill(priv)) {
7445 IWL_DEBUG_MAC80211("leave - RF kill\n");
7446 mutex_unlock(&priv->mutex);
7447 return -EIO;
7448 }
7449
7450 iwl_set_rate(priv);
7451
7452 if (memcmp(&priv->active_rxon,
7453 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7454 iwl_commit_rxon(priv);
7455 else
7456 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7457
7458 IWL_DEBUG_MAC80211("leave\n");
7459
7460 mutex_unlock(&priv->mutex);
7461
7462 return 0;
7463 }
7464
7465 static void iwl_config_ap(struct iwl_priv *priv)
7466 {
7467 int rc = 0;
7468
7469 if (priv->status & STATUS_EXIT_PENDING)
7470 return;
7471
7472 /* The following should be done only at AP bring up */
7473 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7474
7475 /* RXON - unassoc (to set timing command) */
7476 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7477 iwl_commit_rxon(priv);
7478
7479 /* RXON Timing */
7480 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7481 iwl_setup_rxon_timing(priv);
7482 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7483 sizeof(priv->rxon_timing), &priv->rxon_timing);
7484 if (rc)
7485 IWL_WARNING("REPLY_RXON_TIMING failed - "
7486 "Attempting to continue.\n");
7487
7488 iwl4965_set_rxon_chain(priv);
7489
7490 /* FIXME: what should be the assoc_id for AP? */
7491 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7492 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7493 priv->staging_rxon.flags |=
7494 RXON_FLG_SHORT_PREAMBLE_MSK;
7495 else
7496 priv->staging_rxon.flags &=
7497 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7498
7499 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7500 if (priv->assoc_capability &
7501 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7502 priv->staging_rxon.flags |=
7503 RXON_FLG_SHORT_SLOT_MSK;
7504 else
7505 priv->staging_rxon.flags &=
7506 ~RXON_FLG_SHORT_SLOT_MSK;
7507
7508 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7509 priv->staging_rxon.flags &=
7510 ~RXON_FLG_SHORT_SLOT_MSK;
7511 }
7512 /* restore RXON assoc */
7513 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7514 iwl_commit_rxon(priv);
7515 #ifdef CONFIG_IWLWIFI_QOS
7516 iwl_activate_qos(priv, 1);
7517 #endif
7518 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7519 }
7520 iwl_send_beacon_cmd(priv);
7521
7522 /* FIXME - we need to add code here to detect a totally new
7523 * configuration, reset the AP, unassoc, rxon timing, assoc,
7524 * clear sta table, add BCAST sta... */
7525 }
7526
7527 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7528 struct ieee80211_if_conf *conf)
7529 {
7530 struct iwl_priv *priv = hw->priv;
7531 DECLARE_MAC_BUF(mac);
7532 unsigned long flags;
7533 int rc;
7534
7535 if (conf == NULL)
7536 return -EIO;
7537
7538 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7539 (!conf->beacon || !conf->ssid_len)) {
7540 IWL_DEBUG_MAC80211
7541 ("Leaving in AP mode because HostAPD is not ready.\n");
7542 return 0;
7543 }
7544
7545 mutex_lock(&priv->mutex);
7546
7547 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7548 if (conf->bssid)
7549 IWL_DEBUG_MAC80211("bssid: %s\n",
7550 print_mac(mac, conf->bssid));
7551
7552 /*
7553 * very dubious code was here; the probe filtering flag is never set:
7554 *
7555 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7556 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7557 */
7558 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7559 IWL_DEBUG_MAC80211("leave - scanning\n");
7560 mutex_unlock(&priv->mutex);
7561 return 0;
7562 }
7563
7564 if (priv->interface_id != if_id) {
7565 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7566 mutex_unlock(&priv->mutex);
7567 return 0;
7568 }
7569
7570 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7571 if (!conf->bssid) {
7572 conf->bssid = priv->mac_addr;
7573 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7574 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7575 print_mac(mac, conf->bssid));
7576 }
7577 if (priv->ibss_beacon)
7578 dev_kfree_skb(priv->ibss_beacon);
7579
7580 priv->ibss_beacon = conf->beacon;
7581 }
7582
7583 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7584 !is_multicast_ether_addr(conf->bssid)) {
7585 /* If there is currently a HW scan going on in the background
7586 * then we need to cancel it else the RXON below will fail. */
7587 if (iwl_scan_cancel_timeout(priv, 100)) {
7588 IWL_WARNING("Aborted scan still in progress "
7589 "after 100ms\n");
7590 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7591 mutex_unlock(&priv->mutex);
7592 return -EAGAIN;
7593 }
7594 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7595
7596 /* TODO: Audit driver for usage of these members and see
7597 * if mac80211 deprecates them (priv->bssid looks like it
7598 * shouldn't be there, but I haven't scanned the IBSS code
7599 * to verify) - jpk */
7600 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7601
7602 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7603 iwl_config_ap(priv);
7604 else {
7605 rc = iwl_commit_rxon(priv);
7606 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7607 iwl_rxon_add_station(
7608 priv, priv->active_rxon.bssid_addr, 1);
7609 }
7610
7611 } else {
7612 iwl_scan_cancel_timeout(priv, 100);
7613 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7614 iwl_commit_rxon(priv);
7615 }
7616
7617 spin_lock_irqsave(&priv->lock, flags);
7618 if (!conf->ssid_len)
7619 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7620 else
7621 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7622
7623 priv->essid_len = conf->ssid_len;
7624 spin_unlock_irqrestore(&priv->lock, flags);
7625
7626 IWL_DEBUG_MAC80211("leave\n");
7627 mutex_unlock(&priv->mutex);
7628
7629 return 0;
7630 }
7631
7632 static void iwl_configure_filter(struct ieee80211_hw *hw,
7633 unsigned int changed_flags,
7634 unsigned int *total_flags,
7635 int mc_count, struct dev_addr_list *mc_list)
7636 {
7637 /*
7638 * XXX: dummy
7639 * see also iwl_connection_init_rx_config
7640 */
7641 *total_flags = 0;
7642 }
7643
7644 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7645 struct ieee80211_if_init_conf *conf)
7646 {
7647 struct iwl_priv *priv = hw->priv;
7648
7649 IWL_DEBUG_MAC80211("enter\n");
7650
7651 mutex_lock(&priv->mutex);
7652
7653 iwl_scan_cancel_timeout(priv, 100);
7654 cancel_delayed_work(&priv->post_associate);
7655 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7656 iwl_commit_rxon(priv);
7657
7658 if (priv->interface_id == conf->if_id) {
7659 priv->interface_id = 0;
7660 memset(priv->bssid, 0, ETH_ALEN);
7661 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7662 priv->essid_len = 0;
7663 }
7664 mutex_unlock(&priv->mutex);
7665
7666 IWL_DEBUG_MAC80211("leave\n");
7667
7668 }
7669 static void iwl_mac_erp_ie_changed(struct ieee80211_hw *hw,
7670 u8 changes, int cts_protection, int preamble)
7671 {
7672
7673 struct iwl_priv *priv = hw->priv;
7674
7675 if (changes & IEEE80211_ERP_CHANGE_PREAMBLE) {
7676 if (preamble == WLAN_ERP_PREAMBLE_SHORT)
7677 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7678 else
7679 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7680 }
7681
7682 if (changes & IEEE80211_ERP_CHANGE_PROTECTION) {
7683 if (cts_protection)
7684 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7685 else
7686 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7687 }
7688
7689 if (iwl_is_associated(priv))
7690 iwl_send_rxon_assoc(priv);
7691 }
7692
7693 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7694 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7695 {
7696 int rc = 0;
7697 unsigned long flags;
7698 struct iwl_priv *priv = hw->priv;
7699
7700 IWL_DEBUG_MAC80211("enter\n");
7701
7702 mutex_lock(&priv->mutex);
7703 spin_lock_irqsave(&priv->lock, flags);
7704
7705 if (!iwl_is_ready_rf(priv)) {
7706 rc = -EIO;
7707 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7708 goto out_unlock;
7709 }
7710
7711 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7712 rc = -EIO;
7713 IWL_ERROR("ERROR: APs don't scan\n");
7714 goto out_unlock;
7715 }
7716
7717 /* if we just finished scan ask for delay */
7718 if (priv->last_scan_jiffies &&
7719 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7720 jiffies)) {
7721 rc = -EAGAIN;
7722 goto out_unlock;
7723 }
7724 if (len) {
7725 IWL_DEBUG_SCAN("direct scan for "
7726 "%s [%d]\n ",
7727 iwl_escape_essid(ssid, len), (int)len);
7728
7729 priv->one_direct_scan = 1;
7730 priv->direct_ssid_len = (u8)
7731 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7732 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7733 } else
7734 priv->one_direct_scan = 0;
7735
7736 rc = iwl_scan_initiate(priv);
7737
7738 IWL_DEBUG_MAC80211("leave\n");
7739
7740 out_unlock:
7741 spin_unlock_irqrestore(&priv->lock, flags);
7742 mutex_unlock(&priv->mutex);
7743
7744 return rc;
7745 }
7746
7747 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7748 const u8 *local_addr, const u8 *addr,
7749 struct ieee80211_key_conf *key)
7750 {
7751 struct iwl_priv *priv = hw->priv;
7752 DECLARE_MAC_BUF(mac);
7753 int rc = 0;
7754 u8 sta_id;
7755
7756 IWL_DEBUG_MAC80211("enter\n");
7757
7758 if (!iwl_param_hwcrypto) {
7759 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7760 return -EOPNOTSUPP;
7761 }
7762
7763 if (is_zero_ether_addr(addr))
7764 /* only support pairwise keys */
7765 return -EOPNOTSUPP;
7766
7767 sta_id = iwl_hw_find_station(priv, addr);
7768 if (sta_id == IWL_INVALID_STATION) {
7769 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7770 print_mac(mac, addr));
7771 return -EINVAL;
7772 }
7773
7774 mutex_lock(&priv->mutex);
7775
7776 iwl_scan_cancel_timeout(priv, 100);
7777
7778 switch (cmd) {
7779 case SET_KEY:
7780 rc = iwl_update_sta_key_info(priv, key, sta_id);
7781 if (!rc) {
7782 iwl_set_rxon_hwcrypto(priv, 1);
7783 iwl_commit_rxon(priv);
7784 key->hw_key_idx = sta_id;
7785 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7786 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7787 }
7788 break;
7789 case DISABLE_KEY:
7790 rc = iwl_clear_sta_key_info(priv, sta_id);
7791 if (!rc) {
7792 iwl_set_rxon_hwcrypto(priv, 0);
7793 iwl_commit_rxon(priv);
7794 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7795 }
7796 break;
7797 default:
7798 rc = -EINVAL;
7799 }
7800
7801 IWL_DEBUG_MAC80211("leave\n");
7802 mutex_unlock(&priv->mutex);
7803
7804 return rc;
7805 }
7806
7807 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7808 const struct ieee80211_tx_queue_params *params)
7809 {
7810 struct iwl_priv *priv = hw->priv;
7811 #ifdef CONFIG_IWLWIFI_QOS
7812 unsigned long flags;
7813 int q;
7814 #endif /* CONFIG_IWL_QOS */
7815
7816 IWL_DEBUG_MAC80211("enter\n");
7817
7818 if (!iwl_is_ready_rf(priv)) {
7819 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7820 return -EIO;
7821 }
7822
7823 if (queue >= AC_NUM) {
7824 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7825 return 0;
7826 }
7827
7828 #ifdef CONFIG_IWLWIFI_QOS
7829 if (!priv->qos_data.qos_enable) {
7830 priv->qos_data.qos_active = 0;
7831 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7832 return 0;
7833 }
7834 q = AC_NUM - 1 - queue;
7835
7836 spin_lock_irqsave(&priv->lock, flags);
7837
7838 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7839 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7840 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7841 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7842 cpu_to_le16((params->burst_time * 100));
7843
7844 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7845 priv->qos_data.qos_active = 1;
7846
7847 spin_unlock_irqrestore(&priv->lock, flags);
7848
7849 mutex_lock(&priv->mutex);
7850 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7851 iwl_activate_qos(priv, 1);
7852 else if (priv->assoc_id && iwl_is_associated(priv))
7853 iwl_activate_qos(priv, 0);
7854
7855 mutex_unlock(&priv->mutex);
7856
7857 #endif /*CONFIG_IWLWIFI_QOS */
7858
7859 IWL_DEBUG_MAC80211("leave\n");
7860 return 0;
7861 }
7862
7863 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7864 struct ieee80211_tx_queue_stats *stats)
7865 {
7866 struct iwl_priv *priv = hw->priv;
7867 int i, avail;
7868 struct iwl_tx_queue *txq;
7869 struct iwl_queue *q;
7870 unsigned long flags;
7871
7872 IWL_DEBUG_MAC80211("enter\n");
7873
7874 if (!iwl_is_ready_rf(priv)) {
7875 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7876 return -EIO;
7877 }
7878
7879 spin_lock_irqsave(&priv->lock, flags);
7880
7881 for (i = 0; i < AC_NUM; i++) {
7882 txq = &priv->txq[i];
7883 q = &txq->q;
7884 avail = iwl_queue_space(q);
7885
7886 stats->data[i].len = q->n_window - avail;
7887 stats->data[i].limit = q->n_window - q->high_mark;
7888 stats->data[i].count = q->n_window;
7889
7890 }
7891 spin_unlock_irqrestore(&priv->lock, flags);
7892
7893 IWL_DEBUG_MAC80211("leave\n");
7894
7895 return 0;
7896 }
7897
7898 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7899 struct ieee80211_low_level_stats *stats)
7900 {
7901 IWL_DEBUG_MAC80211("enter\n");
7902 IWL_DEBUG_MAC80211("leave\n");
7903
7904 return 0;
7905 }
7906
7907 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7908 {
7909 IWL_DEBUG_MAC80211("enter\n");
7910 IWL_DEBUG_MAC80211("leave\n");
7911
7912 return 0;
7913 }
7914
7915 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7916 {
7917 struct iwl_priv *priv = hw->priv;
7918 unsigned long flags;
7919
7920 mutex_lock(&priv->mutex);
7921 IWL_DEBUG_MAC80211("enter\n");
7922
7923 priv->lq_mngr.lq_ready = 0;
7924 #ifdef CONFIG_IWLWIFI_HT
7925 spin_lock_irqsave(&priv->lock, flags);
7926 memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7927 spin_unlock_irqrestore(&priv->lock, flags);
7928 #ifdef CONFIG_IWLWIFI_HT_AGG
7929 /* if (priv->lq_mngr.agg_ctrl.granted_ba)
7930 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7931
7932 memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7933 priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7934 priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7935 priv->lq_mngr.agg_ctrl.auto_agg = 1;
7936
7937 if (priv->lq_mngr.agg_ctrl.auto_agg)
7938 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7939 #endif /*CONFIG_IWLWIFI_HT_AGG */
7940 #endif /* CONFIG_IWLWIFI_HT */
7941
7942 #ifdef CONFIG_IWLWIFI_QOS
7943 iwl_reset_qos(priv);
7944 #endif
7945
7946 cancel_delayed_work(&priv->post_associate);
7947
7948 spin_lock_irqsave(&priv->lock, flags);
7949 priv->assoc_id = 0;
7950 priv->assoc_capability = 0;
7951 priv->call_post_assoc_from_beacon = 0;
7952 priv->assoc_station_added = 0;
7953
7954 /* new association get rid of ibss beacon skb */
7955 if (priv->ibss_beacon)
7956 dev_kfree_skb(priv->ibss_beacon);
7957
7958 priv->ibss_beacon = NULL;
7959
7960 priv->beacon_int = priv->hw->conf.beacon_int;
7961 priv->timestamp1 = 0;
7962 priv->timestamp0 = 0;
7963 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7964 priv->beacon_int = 0;
7965
7966 spin_unlock_irqrestore(&priv->lock, flags);
7967
7968 /* we are restarting association process
7969 * clear RXON_FILTER_ASSOC_MSK bit
7970 */
7971 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7972 iwl_scan_cancel_timeout(priv, 100);
7973 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7974 iwl_commit_rxon(priv);
7975 }
7976
7977 /* Per mac80211.h: This is only used in IBSS mode... */
7978 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7979
7980 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7981 mutex_unlock(&priv->mutex);
7982 return;
7983 }
7984
7985 if (!iwl_is_ready_rf(priv)) {
7986 IWL_DEBUG_MAC80211("leave - not ready\n");
7987 mutex_unlock(&priv->mutex);
7988 return;
7989 }
7990
7991 priv->only_active_channel = 0;
7992
7993 iwl_set_rate(priv);
7994
7995 mutex_unlock(&priv->mutex);
7996
7997 IWL_DEBUG_MAC80211("leave\n");
7998
7999 }
8000
8001 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8002 struct ieee80211_tx_control *control)
8003 {
8004 struct iwl_priv *priv = hw->priv;
8005 unsigned long flags;
8006
8007 mutex_lock(&priv->mutex);
8008 IWL_DEBUG_MAC80211("enter\n");
8009
8010 if (!iwl_is_ready_rf(priv)) {
8011 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8012 mutex_unlock(&priv->mutex);
8013 return -EIO;
8014 }
8015
8016 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8017 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8018 mutex_unlock(&priv->mutex);
8019 return -EIO;
8020 }
8021
8022 spin_lock_irqsave(&priv->lock, flags);
8023
8024 if (priv->ibss_beacon)
8025 dev_kfree_skb(priv->ibss_beacon);
8026
8027 priv->ibss_beacon = skb;
8028
8029 priv->assoc_id = 0;
8030
8031 IWL_DEBUG_MAC80211("leave\n");
8032 spin_unlock_irqrestore(&priv->lock, flags);
8033
8034 #ifdef CONFIG_IWLWIFI_QOS
8035 iwl_reset_qos(priv);
8036 #endif
8037
8038 queue_work(priv->workqueue, &priv->post_associate.work);
8039
8040 mutex_unlock(&priv->mutex);
8041
8042 return 0;
8043 }
8044
8045 #ifdef CONFIG_IWLWIFI_HT
8046 union ht_cap_info {
8047 struct {
8048 u16 advanced_coding_cap :1;
8049 u16 supported_chan_width_set :1;
8050 u16 mimo_power_save_mode :2;
8051 u16 green_field :1;
8052 u16 short_GI20 :1;
8053 u16 short_GI40 :1;
8054 u16 tx_stbc :1;
8055 u16 rx_stbc :1;
8056 u16 beam_forming :1;
8057 u16 delayed_ba :1;
8058 u16 maximal_amsdu_size :1;
8059 u16 cck_mode_at_40MHz :1;
8060 u16 psmp_support :1;
8061 u16 stbc_ctrl_frame_support :1;
8062 u16 sig_txop_protection_support :1;
8063 };
8064 u16 val;
8065 } __attribute__ ((packed));
8066
8067 union ht_param_info{
8068 struct {
8069 u8 max_rx_ampdu_factor :2;
8070 u8 mpdu_density :3;
8071 u8 reserved :3;
8072 };
8073 u8 val;
8074 } __attribute__ ((packed));
8075
8076 union ht_exra_param_info {
8077 struct {
8078 u8 ext_chan_offset :2;
8079 u8 tx_chan_width :1;
8080 u8 rifs_mode :1;
8081 u8 controlled_access_only :1;
8082 u8 service_interval_granularity :3;
8083 };
8084 u8 val;
8085 } __attribute__ ((packed));
8086
8087 union ht_operation_mode{
8088 struct {
8089 u16 op_mode :2;
8090 u16 non_GF :1;
8091 u16 reserved :13;
8092 };
8093 u16 val;
8094 } __attribute__ ((packed));
8095
8096
8097 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8098 struct ieee80211_ht_additional_info *ht_extra,
8099 struct sta_ht_info *ht_info_ap,
8100 struct sta_ht_info *ht_info)
8101 {
8102 union ht_cap_info cap;
8103 union ht_operation_mode op_mode;
8104 union ht_param_info param_info;
8105 union ht_exra_param_info extra_param_info;
8106
8107 IWL_DEBUG_MAC80211("enter: \n");
8108
8109 if (!ht_info) {
8110 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8111 return -1;
8112 }
8113
8114 if (ht_cap) {
8115 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8116 param_info.val = ht_cap->mac_ht_params_info;
8117 ht_info->is_ht = 1;
8118 if (cap.short_GI20)
8119 ht_info->sgf |= 0x1;
8120 if (cap.short_GI40)
8121 ht_info->sgf |= 0x2;
8122 ht_info->is_green_field = cap.green_field;
8123 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8124 ht_info->supported_chan_width = cap.supported_chan_width_set;
8125 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8126 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8127
8128 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8129 ht_info->mpdu_density = param_info.mpdu_density;
8130
8131 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8132 ht_cap->supported_mcs_set[0],
8133 ht_cap->supported_mcs_set[1]);
8134
8135 if (ht_info_ap) {
8136 ht_info->control_channel = ht_info_ap->control_channel;
8137 ht_info->extension_chan_offset =
8138 ht_info_ap->extension_chan_offset;
8139 ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8140 ht_info->operating_mode = ht_info_ap->operating_mode;
8141 }
8142
8143 if (ht_extra) {
8144 extra_param_info.val = ht_extra->ht_param;
8145 ht_info->control_channel = ht_extra->control_chan;
8146 ht_info->extension_chan_offset =
8147 extra_param_info.ext_chan_offset;
8148 ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8149 op_mode.val = (u16)
8150 le16_to_cpu(ht_extra->operation_mode);
8151 ht_info->operating_mode = op_mode.op_mode;
8152 IWL_DEBUG_MAC80211("control channel %d\n",
8153 ht_extra->control_chan);
8154 }
8155 } else
8156 ht_info->is_ht = 0;
8157
8158 IWL_DEBUG_MAC80211("leave\n");
8159 return 0;
8160 }
8161
8162 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8163 struct ieee80211_ht_capability *ht_cap,
8164 struct ieee80211_ht_additional_info *ht_extra)
8165 {
8166 struct iwl_priv *priv = hw->priv;
8167 int rs;
8168
8169 IWL_DEBUG_MAC80211("enter: \n");
8170
8171 rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8172 iwl4965_set_rxon_chain(priv);
8173
8174 if (priv && priv->assoc_id &&
8175 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8176 unsigned long flags;
8177
8178 spin_lock_irqsave(&priv->lock, flags);
8179 if (priv->beacon_int)
8180 queue_work(priv->workqueue, &priv->post_associate.work);
8181 else
8182 priv->call_post_assoc_from_beacon = 1;
8183 spin_unlock_irqrestore(&priv->lock, flags);
8184 }
8185
8186 IWL_DEBUG_MAC80211("leave: control channel %d\n",
8187 ht_extra->control_chan);
8188 return rs;
8189
8190 }
8191
8192 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8193 struct ieee80211_ht_capability *ht_cap,
8194 u8 use_wide_chan)
8195 {
8196 union ht_cap_info cap;
8197 union ht_param_info param_info;
8198
8199 memset(&cap, 0, sizeof(union ht_cap_info));
8200 memset(&param_info, 0, sizeof(union ht_param_info));
8201
8202 cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8203 cap.green_field = 1;
8204 cap.short_GI20 = 1;
8205 cap.short_GI40 = 1;
8206 cap.supported_chan_width_set = use_wide_chan;
8207 cap.mimo_power_save_mode = 0x3;
8208
8209 param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8210 param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8211 ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8212 ht_cap->mac_ht_params_info = (u8) param_info.val;
8213
8214 ht_cap->supported_mcs_set[0] = 0xff;
8215 ht_cap->supported_mcs_set[1] = 0xff;
8216 ht_cap->supported_mcs_set[4] =
8217 (cap.supported_chan_width_set) ? 0x1: 0x0;
8218 }
8219
8220 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8221 struct ieee80211_ht_capability *ht_cap)
8222 {
8223 u8 use_wide_channel = 1;
8224 struct iwl_priv *priv = hw->priv;
8225
8226 IWL_DEBUG_MAC80211("enter: \n");
8227 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8228 use_wide_channel = 0;
8229
8230 /* no fat tx allowed on 2.4GHZ */
8231 if (priv->phymode != MODE_IEEE80211A)
8232 use_wide_channel = 0;
8233
8234 iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8235 IWL_DEBUG_MAC80211("leave: \n");
8236 }
8237 #endif /*CONFIG_IWLWIFI_HT*/
8238
8239 /*****************************************************************************
8240 *
8241 * sysfs attributes
8242 *
8243 *****************************************************************************/
8244
8245 #ifdef CONFIG_IWLWIFI_DEBUG
8246
8247 /*
8248 * The following adds a new attribute to the sysfs representation
8249 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8250 * used for controlling the debug level.
8251 *
8252 * See the level definitions in iwl for details.
8253 */
8254
8255 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8256 {
8257 return sprintf(buf, "0x%08X\n", iwl_debug_level);
8258 }
8259 static ssize_t store_debug_level(struct device_driver *d,
8260 const char *buf, size_t count)
8261 {
8262 char *p = (char *)buf;
8263 u32 val;
8264
8265 val = simple_strtoul(p, &p, 0);
8266 if (p == buf)
8267 printk(KERN_INFO DRV_NAME
8268 ": %s is not in hex or decimal form.\n", buf);
8269 else
8270 iwl_debug_level = val;
8271
8272 return strnlen(buf, count);
8273 }
8274
8275 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8276 show_debug_level, store_debug_level);
8277
8278 #endif /* CONFIG_IWLWIFI_DEBUG */
8279
8280 static ssize_t show_rf_kill(struct device *d,
8281 struct device_attribute *attr, char *buf)
8282 {
8283 /*
8284 * 0 - RF kill not enabled
8285 * 1 - SW based RF kill active (sysfs)
8286 * 2 - HW based RF kill active
8287 * 3 - Both HW and SW based RF kill active
8288 */
8289 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8290 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8291 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8292
8293 return sprintf(buf, "%i\n", val);
8294 }
8295
8296 static ssize_t store_rf_kill(struct device *d,
8297 struct device_attribute *attr,
8298 const char *buf, size_t count)
8299 {
8300 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8301
8302 mutex_lock(&priv->mutex);
8303 iwl_radio_kill_sw(priv, buf[0] == '1');
8304 mutex_unlock(&priv->mutex);
8305
8306 return count;
8307 }
8308
8309 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8310
8311 static ssize_t show_temperature(struct device *d,
8312 struct device_attribute *attr, char *buf)
8313 {
8314 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8315
8316 if (!iwl_is_alive(priv))
8317 return -EAGAIN;
8318
8319 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8320 }
8321
8322 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8323
8324 static ssize_t show_rs_window(struct device *d,
8325 struct device_attribute *attr,
8326 char *buf)
8327 {
8328 struct iwl_priv *priv = d->driver_data;
8329 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8330 }
8331 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8332
8333 static ssize_t show_tx_power(struct device *d,
8334 struct device_attribute *attr, char *buf)
8335 {
8336 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8337 return sprintf(buf, "%d\n", priv->user_txpower_limit);
8338 }
8339
8340 static ssize_t store_tx_power(struct device *d,
8341 struct device_attribute *attr,
8342 const char *buf, size_t count)
8343 {
8344 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8345 char *p = (char *)buf;
8346 u32 val;
8347
8348 val = simple_strtoul(p, &p, 10);
8349 if (p == buf)
8350 printk(KERN_INFO DRV_NAME
8351 ": %s is not in decimal form.\n", buf);
8352 else
8353 iwl_hw_reg_set_txpower(priv, val);
8354
8355 return count;
8356 }
8357
8358 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8359
8360 static ssize_t show_flags(struct device *d,
8361 struct device_attribute *attr, char *buf)
8362 {
8363 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8364
8365 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8366 }
8367
8368 static ssize_t store_flags(struct device *d,
8369 struct device_attribute *attr,
8370 const char *buf, size_t count)
8371 {
8372 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8373 u32 flags = simple_strtoul(buf, NULL, 0);
8374
8375 mutex_lock(&priv->mutex);
8376 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8377 /* Cancel any currently running scans... */
8378 if (iwl_scan_cancel_timeout(priv, 100))
8379 IWL_WARNING("Could not cancel scan.\n");
8380 else {
8381 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8382 flags);
8383 priv->staging_rxon.flags = cpu_to_le32(flags);
8384 iwl_commit_rxon(priv);
8385 }
8386 }
8387 mutex_unlock(&priv->mutex);
8388
8389 return count;
8390 }
8391
8392 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8393
8394 static ssize_t show_filter_flags(struct device *d,
8395 struct device_attribute *attr, char *buf)
8396 {
8397 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8398
8399 return sprintf(buf, "0x%04X\n",
8400 le32_to_cpu(priv->active_rxon.filter_flags));
8401 }
8402
8403 static ssize_t store_filter_flags(struct device *d,
8404 struct device_attribute *attr,
8405 const char *buf, size_t count)
8406 {
8407 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8408 u32 filter_flags = simple_strtoul(buf, NULL, 0);
8409
8410 mutex_lock(&priv->mutex);
8411 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8412 /* Cancel any currently running scans... */
8413 if (iwl_scan_cancel_timeout(priv, 100))
8414 IWL_WARNING("Could not cancel scan.\n");
8415 else {
8416 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8417 "0x%04X\n", filter_flags);
8418 priv->staging_rxon.filter_flags =
8419 cpu_to_le32(filter_flags);
8420 iwl_commit_rxon(priv);
8421 }
8422 }
8423 mutex_unlock(&priv->mutex);
8424
8425 return count;
8426 }
8427
8428 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8429 store_filter_flags);
8430
8431 static ssize_t show_tune(struct device *d,
8432 struct device_attribute *attr, char *buf)
8433 {
8434 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8435
8436 return sprintf(buf, "0x%04X\n",
8437 (priv->phymode << 8) |
8438 le16_to_cpu(priv->active_rxon.channel));
8439 }
8440
8441 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8442
8443 static ssize_t store_tune(struct device *d,
8444 struct device_attribute *attr,
8445 const char *buf, size_t count)
8446 {
8447 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8448 char *p = (char *)buf;
8449 u16 tune = simple_strtoul(p, &p, 0);
8450 u8 phymode = (tune >> 8) & 0xff;
8451 u16 channel = tune & 0xff;
8452
8453 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8454
8455 mutex_lock(&priv->mutex);
8456 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8457 (priv->phymode != phymode)) {
8458 const struct iwl_channel_info *ch_info;
8459
8460 ch_info = iwl_get_channel_info(priv, phymode, channel);
8461 if (!ch_info) {
8462 IWL_WARNING("Requested invalid phymode/channel "
8463 "combination: %d %d\n", phymode, channel);
8464 mutex_unlock(&priv->mutex);
8465 return -EINVAL;
8466 }
8467
8468 /* Cancel any currently running scans... */
8469 if (iwl_scan_cancel_timeout(priv, 100))
8470 IWL_WARNING("Could not cancel scan.\n");
8471 else {
8472 IWL_DEBUG_INFO("Committing phymode and "
8473 "rxon.channel = %d %d\n",
8474 phymode, channel);
8475
8476 iwl_set_rxon_channel(priv, phymode, channel);
8477 iwl_set_flags_for_phymode(priv, phymode);
8478
8479 iwl_set_rate(priv);
8480 iwl_commit_rxon(priv);
8481 }
8482 }
8483 mutex_unlock(&priv->mutex);
8484
8485 return count;
8486 }
8487
8488 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8489
8490 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8491
8492 static ssize_t show_measurement(struct device *d,
8493 struct device_attribute *attr, char *buf)
8494 {
8495 struct iwl_priv *priv = dev_get_drvdata(d);
8496 struct iwl_spectrum_notification measure_report;
8497 u32 size = sizeof(measure_report), len = 0, ofs = 0;
8498 u8 *data = (u8 *) & measure_report;
8499 unsigned long flags;
8500
8501 spin_lock_irqsave(&priv->lock, flags);
8502 if (!(priv->measurement_status & MEASUREMENT_READY)) {
8503 spin_unlock_irqrestore(&priv->lock, flags);
8504 return 0;
8505 }
8506 memcpy(&measure_report, &priv->measure_report, size);
8507 priv->measurement_status = 0;
8508 spin_unlock_irqrestore(&priv->lock, flags);
8509
8510 while (size && (PAGE_SIZE - len)) {
8511 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8512 PAGE_SIZE - len, 1);
8513 len = strlen(buf);
8514 if (PAGE_SIZE - len)
8515 buf[len++] = '\n';
8516
8517 ofs += 16;
8518 size -= min(size, 16U);
8519 }
8520
8521 return len;
8522 }
8523
8524 static ssize_t store_measurement(struct device *d,
8525 struct device_attribute *attr,
8526 const char *buf, size_t count)
8527 {
8528 struct iwl_priv *priv = dev_get_drvdata(d);
8529 struct ieee80211_measurement_params params = {
8530 .channel = le16_to_cpu(priv->active_rxon.channel),
8531 .start_time = cpu_to_le64(priv->last_tsf),
8532 .duration = cpu_to_le16(1),
8533 };
8534 u8 type = IWL_MEASURE_BASIC;
8535 u8 buffer[32];
8536 u8 channel;
8537
8538 if (count) {
8539 char *p = buffer;
8540 strncpy(buffer, buf, min(sizeof(buffer), count));
8541 channel = simple_strtoul(p, NULL, 0);
8542 if (channel)
8543 params.channel = channel;
8544
8545 p = buffer;
8546 while (*p && *p != ' ')
8547 p++;
8548 if (*p)
8549 type = simple_strtoul(p + 1, NULL, 0);
8550 }
8551
8552 IWL_DEBUG_INFO("Invoking measurement of type %d on "
8553 "channel %d (for '%s')\n", type, params.channel, buf);
8554 iwl_get_measurement(priv, &params, type);
8555
8556 return count;
8557 }
8558
8559 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8560 show_measurement, store_measurement);
8561 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8562
8563 static ssize_t store_retry_rate(struct device *d,
8564 struct device_attribute *attr,
8565 const char *buf, size_t count)
8566 {
8567 struct iwl_priv *priv = dev_get_drvdata(d);
8568
8569 priv->retry_rate = simple_strtoul(buf, NULL, 0);
8570 if (priv->retry_rate <= 0)
8571 priv->retry_rate = 1;
8572
8573 return count;
8574 }
8575
8576 static ssize_t show_retry_rate(struct device *d,
8577 struct device_attribute *attr, char *buf)
8578 {
8579 struct iwl_priv *priv = dev_get_drvdata(d);
8580 return sprintf(buf, "%d", priv->retry_rate);
8581 }
8582
8583 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8584 store_retry_rate);
8585
8586 static ssize_t store_power_level(struct device *d,
8587 struct device_attribute *attr,
8588 const char *buf, size_t count)
8589 {
8590 struct iwl_priv *priv = dev_get_drvdata(d);
8591 int rc;
8592 int mode;
8593
8594 mode = simple_strtoul(buf, NULL, 0);
8595 mutex_lock(&priv->mutex);
8596
8597 if (!iwl_is_ready(priv)) {
8598 rc = -EAGAIN;
8599 goto out;
8600 }
8601
8602 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8603 mode = IWL_POWER_AC;
8604 else
8605 mode |= IWL_POWER_ENABLED;
8606
8607 if (mode != priv->power_mode) {
8608 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8609 if (rc) {
8610 IWL_DEBUG_MAC80211("failed setting power mode.\n");
8611 goto out;
8612 }
8613 priv->power_mode = mode;
8614 }
8615
8616 rc = count;
8617
8618 out:
8619 mutex_unlock(&priv->mutex);
8620 return rc;
8621 }
8622
8623 #define MAX_WX_STRING 80
8624
8625 /* Values are in microsecond */
8626 static const s32 timeout_duration[] = {
8627 350000,
8628 250000,
8629 75000,
8630 37000,
8631 25000,
8632 };
8633 static const s32 period_duration[] = {
8634 400000,
8635 700000,
8636 1000000,
8637 1000000,
8638 1000000
8639 };
8640
8641 static ssize_t show_power_level(struct device *d,
8642 struct device_attribute *attr, char *buf)
8643 {
8644 struct iwl_priv *priv = dev_get_drvdata(d);
8645 int level = IWL_POWER_LEVEL(priv->power_mode);
8646 char *p = buf;
8647
8648 p += sprintf(p, "%d ", level);
8649 switch (level) {
8650 case IWL_POWER_MODE_CAM:
8651 case IWL_POWER_AC:
8652 p += sprintf(p, "(AC)");
8653 break;
8654 case IWL_POWER_BATTERY:
8655 p += sprintf(p, "(BATTERY)");
8656 break;
8657 default:
8658 p += sprintf(p,
8659 "(Timeout %dms, Period %dms)",
8660 timeout_duration[level - 1] / 1000,
8661 period_duration[level - 1] / 1000);
8662 }
8663
8664 if (!(priv->power_mode & IWL_POWER_ENABLED))
8665 p += sprintf(p, " OFF\n");
8666 else
8667 p += sprintf(p, " \n");
8668
8669 return (p - buf + 1);
8670
8671 }
8672
8673 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8674 store_power_level);
8675
8676 static ssize_t show_channels(struct device *d,
8677 struct device_attribute *attr, char *buf)
8678 {
8679 struct iwl_priv *priv = dev_get_drvdata(d);
8680 int len = 0, i;
8681 struct ieee80211_channel *channels = NULL;
8682 const struct ieee80211_hw_mode *hw_mode = NULL;
8683 int count = 0;
8684
8685 if (!iwl_is_ready(priv))
8686 return -EAGAIN;
8687
8688 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8689 if (!hw_mode)
8690 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8691 if (hw_mode) {
8692 channels = hw_mode->channels;
8693 count = hw_mode->num_channels;
8694 }
8695
8696 len +=
8697 sprintf(&buf[len],
8698 "Displaying %d channels in 2.4GHz band "
8699 "(802.11bg):\n", count);
8700
8701 for (i = 0; i < count; i++)
8702 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8703 channels[i].chan,
8704 channels[i].power_level,
8705 channels[i].
8706 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8707 " (IEEE 802.11h required)" : "",
8708 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8709 || (channels[i].
8710 flag &
8711 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8712 ", IBSS",
8713 channels[i].
8714 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8715 "active/passive" : "passive only");
8716
8717 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8718 if (hw_mode) {
8719 channels = hw_mode->channels;
8720 count = hw_mode->num_channels;
8721 } else {
8722 channels = NULL;
8723 count = 0;
8724 }
8725
8726 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8727 "(802.11a):\n", count);
8728
8729 for (i = 0; i < count; i++)
8730 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8731 channels[i].chan,
8732 channels[i].power_level,
8733 channels[i].
8734 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8735 " (IEEE 802.11h required)" : "",
8736 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8737 || (channels[i].
8738 flag &
8739 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8740 ", IBSS",
8741 channels[i].
8742 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8743 "active/passive" : "passive only");
8744
8745 return len;
8746 }
8747
8748 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8749
8750 static ssize_t show_statistics(struct device *d,
8751 struct device_attribute *attr, char *buf)
8752 {
8753 struct iwl_priv *priv = dev_get_drvdata(d);
8754 u32 size = sizeof(struct iwl_notif_statistics);
8755 u32 len = 0, ofs = 0;
8756 u8 *data = (u8 *) & priv->statistics;
8757 int rc = 0;
8758
8759 if (!iwl_is_alive(priv))
8760 return -EAGAIN;
8761
8762 mutex_lock(&priv->mutex);
8763 rc = iwl_send_statistics_request(priv);
8764 mutex_unlock(&priv->mutex);
8765
8766 if (rc) {
8767 len = sprintf(buf,
8768 "Error sending statistics request: 0x%08X\n", rc);
8769 return len;
8770 }
8771
8772 while (size && (PAGE_SIZE - len)) {
8773 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8774 PAGE_SIZE - len, 1);
8775 len = strlen(buf);
8776 if (PAGE_SIZE - len)
8777 buf[len++] = '\n';
8778
8779 ofs += 16;
8780 size -= min(size, 16U);
8781 }
8782
8783 return len;
8784 }
8785
8786 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8787
8788 static ssize_t show_antenna(struct device *d,
8789 struct device_attribute *attr, char *buf)
8790 {
8791 struct iwl_priv *priv = dev_get_drvdata(d);
8792
8793 if (!iwl_is_alive(priv))
8794 return -EAGAIN;
8795
8796 return sprintf(buf, "%d\n", priv->antenna);
8797 }
8798
8799 static ssize_t store_antenna(struct device *d,
8800 struct device_attribute *attr,
8801 const char *buf, size_t count)
8802 {
8803 int ant;
8804 struct iwl_priv *priv = dev_get_drvdata(d);
8805
8806 if (count == 0)
8807 return 0;
8808
8809 if (sscanf(buf, "%1i", &ant) != 1) {
8810 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8811 return count;
8812 }
8813
8814 if ((ant >= 0) && (ant <= 2)) {
8815 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8816 priv->antenna = (enum iwl_antenna)ant;
8817 } else
8818 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8819
8820
8821 return count;
8822 }
8823
8824 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8825
8826 static ssize_t show_status(struct device *d,
8827 struct device_attribute *attr, char *buf)
8828 {
8829 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8830 if (!iwl_is_alive(priv))
8831 return -EAGAIN;
8832 return sprintf(buf, "0x%08x\n", (int)priv->status);
8833 }
8834
8835 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8836
8837 static ssize_t dump_error_log(struct device *d,
8838 struct device_attribute *attr,
8839 const char *buf, size_t count)
8840 {
8841 char *p = (char *)buf;
8842
8843 if (p[0] == '1')
8844 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8845
8846 return strnlen(buf, count);
8847 }
8848
8849 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8850
8851 static ssize_t dump_event_log(struct device *d,
8852 struct device_attribute *attr,
8853 const char *buf, size_t count)
8854 {
8855 char *p = (char *)buf;
8856
8857 if (p[0] == '1')
8858 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8859
8860 return strnlen(buf, count);
8861 }
8862
8863 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8864
8865 /*****************************************************************************
8866 *
8867 * driver setup and teardown
8868 *
8869 *****************************************************************************/
8870
8871 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8872 {
8873 priv->workqueue = create_workqueue(DRV_NAME);
8874
8875 init_waitqueue_head(&priv->wait_command_queue);
8876
8877 INIT_WORK(&priv->up, iwl_bg_up);
8878 INIT_WORK(&priv->restart, iwl_bg_restart);
8879 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8880 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8881 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8882 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8883 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8884 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8885 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8886 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8887 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8888 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8889
8890 iwl_hw_setup_deferred_work(priv);
8891
8892 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8893 iwl_irq_tasklet, (unsigned long)priv);
8894 }
8895
8896 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8897 {
8898 iwl_hw_cancel_deferred_work(priv);
8899
8900 cancel_delayed_work_sync(&priv->init_alive_start);
8901 cancel_delayed_work(&priv->scan_check);
8902 cancel_delayed_work(&priv->alive_start);
8903 cancel_delayed_work(&priv->post_associate);
8904 cancel_work_sync(&priv->beacon_update);
8905 }
8906
8907 static struct attribute *iwl_sysfs_entries[] = {
8908 &dev_attr_antenna.attr,
8909 &dev_attr_channels.attr,
8910 &dev_attr_dump_errors.attr,
8911 &dev_attr_dump_events.attr,
8912 &dev_attr_flags.attr,
8913 &dev_attr_filter_flags.attr,
8914 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8915 &dev_attr_measurement.attr,
8916 #endif
8917 &dev_attr_power_level.attr,
8918 &dev_attr_retry_rate.attr,
8919 &dev_attr_rf_kill.attr,
8920 &dev_attr_rs_window.attr,
8921 &dev_attr_statistics.attr,
8922 &dev_attr_status.attr,
8923 &dev_attr_temperature.attr,
8924 &dev_attr_tune.attr,
8925 &dev_attr_tx_power.attr,
8926
8927 NULL
8928 };
8929
8930 static struct attribute_group iwl_attribute_group = {
8931 .name = NULL, /* put in device directory */
8932 .attrs = iwl_sysfs_entries,
8933 };
8934
8935 static struct ieee80211_ops iwl_hw_ops = {
8936 .tx = iwl_mac_tx,
8937 .start = iwl_mac_start,
8938 .stop = iwl_mac_stop,
8939 .add_interface = iwl_mac_add_interface,
8940 .remove_interface = iwl_mac_remove_interface,
8941 .config = iwl_mac_config,
8942 .config_interface = iwl_mac_config_interface,
8943 .configure_filter = iwl_configure_filter,
8944 .set_key = iwl_mac_set_key,
8945 .get_stats = iwl_mac_get_stats,
8946 .get_tx_stats = iwl_mac_get_tx_stats,
8947 .conf_tx = iwl_mac_conf_tx,
8948 .get_tsf = iwl_mac_get_tsf,
8949 .reset_tsf = iwl_mac_reset_tsf,
8950 .beacon_update = iwl_mac_beacon_update,
8951 .erp_ie_changed = iwl_mac_erp_ie_changed,
8952 #ifdef CONFIG_IWLWIFI_HT
8953 .conf_ht = iwl_mac_conf_ht,
8954 .get_ht_capab = iwl_mac_get_ht_capab,
8955 #ifdef CONFIG_IWLWIFI_HT_AGG
8956 .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8957 .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8958 .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8959 .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8960 #endif /* CONFIG_IWLWIFI_HT_AGG */
8961 #endif /* CONFIG_IWLWIFI_HT */
8962 .hw_scan = iwl_mac_hw_scan
8963 };
8964
8965 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8966 {
8967 int err = 0;
8968 struct iwl_priv *priv;
8969 struct ieee80211_hw *hw;
8970 int i;
8971
8972 if (iwl_param_disable_hw_scan) {
8973 IWL_DEBUG_INFO("Disabling hw_scan\n");
8974 iwl_hw_ops.hw_scan = NULL;
8975 }
8976
8977 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8978 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8979 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8980 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8981 err = -EINVAL;
8982 goto out;
8983 }
8984
8985 /* mac80211 allocates memory for this device instance, including
8986 * space for this driver's private structure */
8987 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8988 if (hw == NULL) {
8989 IWL_ERROR("Can not allocate network device\n");
8990 err = -ENOMEM;
8991 goto out;
8992 }
8993 SET_IEEE80211_DEV(hw, &pdev->dev);
8994
8995 hw->rate_control_algorithm = "iwl-4965-rs";
8996
8997 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8998 priv = hw->priv;
8999 priv->hw = hw;
9000
9001 priv->pci_dev = pdev;
9002 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
9003 #ifdef CONFIG_IWLWIFI_DEBUG
9004 iwl_debug_level = iwl_param_debug;
9005 atomic_set(&priv->restrict_refcnt, 0);
9006 #endif
9007 priv->retry_rate = 1;
9008
9009 priv->ibss_beacon = NULL;
9010
9011 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9012 * the range of signal quality values that we'll provide.
9013 * Negative values for level/noise indicate that we'll provide dBm.
9014 * For WE, at least, non-0 values here *enable* display of values
9015 * in app (iwconfig). */
9016 hw->max_rssi = -20; /* signal level, negative indicates dBm */
9017 hw->max_noise = -20; /* noise level, negative indicates dBm */
9018 hw->max_signal = 100; /* link quality indication (%) */
9019
9020 /* Tell mac80211 our Tx characteristics */
9021 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9022
9023 hw->queues = 4;
9024 #ifdef CONFIG_IWLWIFI_HT
9025 #ifdef CONFIG_IWLWIFI_HT_AGG
9026 hw->queues = 16;
9027 #endif /* CONFIG_IWLWIFI_HT_AGG */
9028 #endif /* CONFIG_IWLWIFI_HT */
9029
9030 spin_lock_init(&priv->lock);
9031 spin_lock_init(&priv->power_data.lock);
9032 spin_lock_init(&priv->sta_lock);
9033 spin_lock_init(&priv->hcmd_lock);
9034 spin_lock_init(&priv->lq_mngr.lock);
9035
9036 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9037 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9038
9039 INIT_LIST_HEAD(&priv->free_frames);
9040
9041 mutex_init(&priv->mutex);
9042 if (pci_enable_device(pdev)) {
9043 err = -ENODEV;
9044 goto out_ieee80211_free_hw;
9045 }
9046
9047 pci_set_master(pdev);
9048
9049 iwl_clear_stations_table(priv);
9050
9051 priv->data_retry_limit = -1;
9052 priv->ieee_channels = NULL;
9053 priv->ieee_rates = NULL;
9054 priv->phymode = -1;
9055
9056 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9057 if (!err)
9058 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9059 if (err) {
9060 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9061 goto out_pci_disable_device;
9062 }
9063
9064 pci_set_drvdata(pdev, priv);
9065 err = pci_request_regions(pdev, DRV_NAME);
9066 if (err)
9067 goto out_pci_disable_device;
9068 /* We disable the RETRY_TIMEOUT register (0x41) to keep
9069 * PCI Tx retries from interfering with C3 CPU state */
9070 pci_write_config_byte(pdev, 0x41, 0x00);
9071 priv->hw_base = pci_iomap(pdev, 0, 0);
9072 if (!priv->hw_base) {
9073 err = -ENODEV;
9074 goto out_pci_release_regions;
9075 }
9076
9077 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9078 (unsigned long long) pci_resource_len(pdev, 0));
9079 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9080
9081 /* Initialize module parameter values here */
9082
9083 if (iwl_param_disable) {
9084 set_bit(STATUS_RF_KILL_SW, &priv->status);
9085 IWL_DEBUG_INFO("Radio disabled.\n");
9086 }
9087
9088 priv->iw_mode = IEEE80211_IF_TYPE_STA;
9089
9090 priv->ps_mode = 0;
9091 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9092 priv->is_ht_enabled = 1;
9093 priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9094 priv->valid_antenna = 0x7; /* assume all 3 connected */
9095 priv->ps_mode = IWL_MIMO_PS_NONE;
9096
9097 iwl4965_set_rxon_chain(priv);
9098
9099 printk(KERN_INFO DRV_NAME
9100 ": Detected Intel Wireless WiFi Link 4965AGN\n");
9101
9102 /* Device-specific setup */
9103 if (iwl_hw_set_hw_setting(priv)) {
9104 IWL_ERROR("failed to set hw settings\n");
9105 mutex_unlock(&priv->mutex);
9106 goto out_iounmap;
9107 }
9108
9109 #ifdef CONFIG_IWLWIFI_QOS
9110 if (iwl_param_qos_enable)
9111 priv->qos_data.qos_enable = 1;
9112
9113 iwl_reset_qos(priv);
9114
9115 priv->qos_data.qos_active = 0;
9116 priv->qos_data.qos_cap.val = 0;
9117 #endif /* CONFIG_IWLWIFI_QOS */
9118
9119 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9120 iwl_setup_deferred_work(priv);
9121 iwl_setup_rx_handlers(priv);
9122
9123 priv->rates_mask = IWL_RATES_MASK;
9124 /* If power management is turned on, default to AC mode */
9125 priv->power_mode = IWL_POWER_AC;
9126 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9127
9128 pci_enable_msi(pdev);
9129
9130 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9131 if (err) {
9132 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9133 goto out_disable_msi;
9134 }
9135
9136 mutex_lock(&priv->mutex);
9137
9138 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9139 if (err) {
9140 IWL_ERROR("failed to create sysfs device attributes\n");
9141 mutex_unlock(&priv->mutex);
9142 goto out_release_irq;
9143 }
9144
9145 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9146 * ucode filename and max sizes are card-specific. */
9147 err = iwl_read_ucode(priv);
9148 if (err) {
9149 IWL_ERROR("Could not read microcode: %d\n", err);
9150 mutex_unlock(&priv->mutex);
9151 goto out_pci_alloc;
9152 }
9153
9154 mutex_unlock(&priv->mutex);
9155
9156 IWL_DEBUG_INFO("Queueing UP work.\n");
9157
9158 queue_work(priv->workqueue, &priv->up);
9159
9160 return 0;
9161
9162 out_pci_alloc:
9163 iwl_dealloc_ucode_pci(priv);
9164
9165 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9166
9167 out_release_irq:
9168 free_irq(pdev->irq, priv);
9169
9170 out_disable_msi:
9171 pci_disable_msi(pdev);
9172 destroy_workqueue(priv->workqueue);
9173 priv->workqueue = NULL;
9174 iwl_unset_hw_setting(priv);
9175
9176 out_iounmap:
9177 pci_iounmap(pdev, priv->hw_base);
9178 out_pci_release_regions:
9179 pci_release_regions(pdev);
9180 out_pci_disable_device:
9181 pci_disable_device(pdev);
9182 pci_set_drvdata(pdev, NULL);
9183 out_ieee80211_free_hw:
9184 ieee80211_free_hw(priv->hw);
9185 out:
9186 return err;
9187 }
9188
9189 static void iwl_pci_remove(struct pci_dev *pdev)
9190 {
9191 struct iwl_priv *priv = pci_get_drvdata(pdev);
9192 struct list_head *p, *q;
9193 int i;
9194
9195 if (!priv)
9196 return;
9197
9198 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9199
9200 set_bit(STATUS_EXIT_PENDING, &priv->status);
9201
9202 iwl_down(priv);
9203
9204 /* Free MAC hash list for ADHOC */
9205 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9206 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9207 list_del(p);
9208 kfree(list_entry(p, struct iwl_ibss_seq, list));
9209 }
9210 }
9211
9212 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9213
9214 iwl_dealloc_ucode_pci(priv);
9215
9216 if (priv->rxq.bd)
9217 iwl_rx_queue_free(priv, &priv->rxq);
9218 iwl_hw_txq_ctx_free(priv);
9219
9220 iwl_unset_hw_setting(priv);
9221 iwl_clear_stations_table(priv);
9222
9223 if (priv->mac80211_registered) {
9224 ieee80211_unregister_hw(priv->hw);
9225 iwl_rate_control_unregister(priv->hw);
9226 }
9227
9228 /*netif_stop_queue(dev); */
9229 flush_workqueue(priv->workqueue);
9230
9231 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9232 * priv->workqueue... so we can't take down the workqueue
9233 * until now... */
9234 destroy_workqueue(priv->workqueue);
9235 priv->workqueue = NULL;
9236
9237 free_irq(pdev->irq, priv);
9238 pci_disable_msi(pdev);
9239 pci_iounmap(pdev, priv->hw_base);
9240 pci_release_regions(pdev);
9241 pci_disable_device(pdev);
9242 pci_set_drvdata(pdev, NULL);
9243
9244 kfree(priv->channel_info);
9245
9246 kfree(priv->ieee_channels);
9247 kfree(priv->ieee_rates);
9248
9249 if (priv->ibss_beacon)
9250 dev_kfree_skb(priv->ibss_beacon);
9251
9252 ieee80211_free_hw(priv->hw);
9253 }
9254
9255 #ifdef CONFIG_PM
9256
9257 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9258 {
9259 struct iwl_priv *priv = pci_get_drvdata(pdev);
9260
9261 set_bit(STATUS_IN_SUSPEND, &priv->status);
9262
9263 /* Take down the device; powers it off, etc. */
9264 iwl_down(priv);
9265
9266 if (priv->mac80211_registered)
9267 ieee80211_stop_queues(priv->hw);
9268
9269 pci_save_state(pdev);
9270 pci_disable_device(pdev);
9271 pci_set_power_state(pdev, PCI_D3hot);
9272
9273 return 0;
9274 }
9275
9276 static void iwl_resume(struct iwl_priv *priv)
9277 {
9278 unsigned long flags;
9279
9280 /* The following it a temporary work around due to the
9281 * suspend / resume not fully initializing the NIC correctly.
9282 * Without all of the following, resume will not attempt to take
9283 * down the NIC (it shouldn't really need to) and will just try
9284 * and bring the NIC back up. However that fails during the
9285 * ucode verification process. This then causes iwl_down to be
9286 * called *after* iwl_hw_nic_init() has succeeded -- which
9287 * then lets the next init sequence succeed. So, we've
9288 * replicated all of that NIC init code here... */
9289
9290 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9291
9292 iwl_hw_nic_init(priv);
9293
9294 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9295 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9296 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9297 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9298 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9299 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9300
9301 /* tell the device to stop sending interrupts */
9302 iwl_disable_interrupts(priv);
9303
9304 spin_lock_irqsave(&priv->lock, flags);
9305 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9306
9307 if (!iwl_grab_nic_access(priv)) {
9308 iwl_write_prph(priv, APMG_CLK_DIS_REG,
9309 APMG_CLK_VAL_DMA_CLK_RQT);
9310 iwl_release_nic_access(priv);
9311 }
9312 spin_unlock_irqrestore(&priv->lock, flags);
9313
9314 udelay(5);
9315
9316 iwl_hw_nic_reset(priv);
9317
9318 /* Bring the device back up */
9319 clear_bit(STATUS_IN_SUSPEND, &priv->status);
9320 queue_work(priv->workqueue, &priv->up);
9321 }
9322
9323 static int iwl_pci_resume(struct pci_dev *pdev)
9324 {
9325 struct iwl_priv *priv = pci_get_drvdata(pdev);
9326 int err;
9327
9328 printk(KERN_INFO "Coming out of suspend...\n");
9329
9330 pci_set_power_state(pdev, PCI_D0);
9331 err = pci_enable_device(pdev);
9332 pci_restore_state(pdev);
9333
9334 /*
9335 * Suspend/Resume resets the PCI configuration space, so we have to
9336 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9337 * from interfering with C3 CPU state. pci_restore_state won't help
9338 * here since it only restores the first 64 bytes pci config header.
9339 */
9340 pci_write_config_byte(pdev, 0x41, 0x00);
9341
9342 iwl_resume(priv);
9343
9344 return 0;
9345 }
9346
9347 #endif /* CONFIG_PM */
9348
9349 /*****************************************************************************
9350 *
9351 * driver and module entry point
9352 *
9353 *****************************************************************************/
9354
9355 static struct pci_driver iwl_driver = {
9356 .name = DRV_NAME,
9357 .id_table = iwl_hw_card_ids,
9358 .probe = iwl_pci_probe,
9359 .remove = __devexit_p(iwl_pci_remove),
9360 #ifdef CONFIG_PM
9361 .suspend = iwl_pci_suspend,
9362 .resume = iwl_pci_resume,
9363 #endif
9364 };
9365
9366 static int __init iwl_init(void)
9367 {
9368
9369 int ret;
9370 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9371 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9372 ret = pci_register_driver(&iwl_driver);
9373 if (ret) {
9374 IWL_ERROR("Unable to initialize PCI module\n");
9375 return ret;
9376 }
9377 #ifdef CONFIG_IWLWIFI_DEBUG
9378 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9379 if (ret) {
9380 IWL_ERROR("Unable to create driver sysfs file\n");
9381 pci_unregister_driver(&iwl_driver);
9382 return ret;
9383 }
9384 #endif
9385
9386 return ret;
9387 }
9388
9389 static void __exit iwl_exit(void)
9390 {
9391 #ifdef CONFIG_IWLWIFI_DEBUG
9392 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9393 #endif
9394 pci_unregister_driver(&iwl_driver);
9395 }
9396
9397 module_param_named(antenna, iwl_param_antenna, int, 0444);
9398 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9399 module_param_named(disable, iwl_param_disable, int, 0444);
9400 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9401 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9402 MODULE_PARM_DESC(hwcrypto,
9403 "using hardware crypto engine (default 0 [software])\n");
9404 module_param_named(debug, iwl_param_debug, int, 0444);
9405 MODULE_PARM_DESC(debug, "debug output mask");
9406 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9407 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9408
9409 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9410 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9411
9412 /* QoS */
9413 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9414 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9415
9416 module_exit(iwl_exit);
9417 module_init(iwl_init);
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