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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 /*
31 * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
32 * by defining IWL to either 3945 or 4965. The Makefile used when building
33 * the base targets will create base-3945.o and base-4965.o
34 *
35 * The eventual goal is to move as many of the #if IWL / #endif blocks out of
36 * this file and into the hardware specific implementation files (iwl-XXXX.c)
37 * and leave only the common (non #ifdef sprinkled) code in this file
38 */
39
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/version.h>
43 #include <linux/init.h>
44 #include <linux/pci.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/delay.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/wireless.h>
50 #include <linux/firmware.h>
51 #include <linux/skbuff.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/if_arp.h>
55
56 #include <net/ieee80211_radiotap.h>
57 #include <net/mac80211.h>
58
59 #include <asm/div64.h>
60
61 #define IWL 3945
62
63 #include "iwlwifi.h"
64 #include "iwl-3945.h"
65 #include "iwl-helpers.h"
66
67 #ifdef CONFIG_IWLWIFI_DEBUG
68 u32 iwl_debug_level;
69 #endif
70
71 /******************************************************************************
72 *
73 * module boiler plate
74 *
75 ******************************************************************************/
76
77 /* module parameters */
78 int iwl_param_disable_hw_scan;
79 int iwl_param_debug;
80 int iwl_param_disable; /* def: enable radio */
81 int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
82 int iwl_param_hwcrypto; /* def: using software encryption */
83 int iwl_param_qos_enable = 1;
84 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
85
86 /*
87 * module name, copyright, version, etc.
88 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
89 */
90
91 #define DRV_DESCRIPTION \
92 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
93
94 #ifdef CONFIG_IWLWIFI_DEBUG
95 #define VD "d"
96 #else
97 #define VD
98 #endif
99
100 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
101 #define VS "s"
102 #else
103 #define VS
104 #endif
105
106 #define IWLWIFI_VERSION "0.1.15k" VD VS
107 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
108 #define DRV_VERSION IWLWIFI_VERSION
109
110 /* Change firmware file name, using "-" and incrementing number,
111 * *only* when uCode interface or architecture changes so that it
112 * is not compatible with earlier drivers.
113 * This number will also appear in << 8 position of 1st dword of uCode file */
114 #define IWL3945_UCODE_API "-1"
115
116 MODULE_DESCRIPTION(DRV_DESCRIPTION);
117 MODULE_VERSION(DRV_VERSION);
118 MODULE_AUTHOR(DRV_COPYRIGHT);
119 MODULE_LICENSE("GPL");
120
121 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
122 {
123 u16 fc = le16_to_cpu(hdr->frame_control);
124 int hdr_len = ieee80211_get_hdrlen(fc);
125
126 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
127 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
128 return NULL;
129 }
130
131 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
132 struct iwl_priv *priv, int mode)
133 {
134 int i;
135
136 for (i = 0; i < 3; i++)
137 if (priv->modes[i].mode == mode)
138 return &priv->modes[i];
139
140 return NULL;
141 }
142
143 static int iwl_is_empty_essid(const char *essid, int essid_len)
144 {
145 /* Single white space is for Linksys APs */
146 if (essid_len == 1 && essid[0] == ' ')
147 return 1;
148
149 /* Otherwise, if the entire essid is 0, we assume it is hidden */
150 while (essid_len) {
151 essid_len--;
152 if (essid[essid_len] != '\0')
153 return 0;
154 }
155
156 return 1;
157 }
158
159 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
160 {
161 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
162 const char *s = essid;
163 char *d = escaped;
164
165 if (iwl_is_empty_essid(essid, essid_len)) {
166 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
167 return escaped;
168 }
169
170 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
171 while (essid_len--) {
172 if (*s == '\0') {
173 *d++ = '\\';
174 *d++ = '0';
175 s++;
176 } else
177 *d++ = *s++;
178 }
179 *d = '\0';
180 return escaped;
181 }
182
183 static void iwl_print_hex_dump(int level, void *p, u32 len)
184 {
185 #ifdef CONFIG_IWLWIFI_DEBUG
186 if (!(iwl_debug_level & level))
187 return;
188
189 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
190 p, len, 1);
191 #endif
192 }
193
194 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
195 * DMA services
196 *
197 * Theory of operation
198 *
199 * A queue is a circular buffers with 'Read' and 'Write' pointers.
200 * 2 empty entries always kept in the buffer to protect from overflow.
201 *
202 * For Tx queue, there are low mark and high mark limits. If, after queuing
203 * the packet for Tx, free space become < low mark, Tx queue stopped. When
204 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
205 * Tx queue resumed.
206 *
207 * The IWL operates with six queues, one receive queue in the device's
208 * sram, one transmit queue for sending commands to the device firmware,
209 * and four transmit queues for data.
210 ***************************************************/
211
212 static int iwl_queue_space(const struct iwl_queue *q)
213 {
214 int s = q->last_used - q->first_empty;
215
216 if (q->last_used > q->first_empty)
217 s -= q->n_bd;
218
219 if (s <= 0)
220 s += q->n_window;
221 /* keep some reserve to not confuse empty and full situations */
222 s -= 2;
223 if (s < 0)
224 s = 0;
225 return s;
226 }
227
228 /* XXX: n_bd must be power-of-two size */
229 static inline int iwl_queue_inc_wrap(int index, int n_bd)
230 {
231 return ++index & (n_bd - 1);
232 }
233
234 /* XXX: n_bd must be power-of-two size */
235 static inline int iwl_queue_dec_wrap(int index, int n_bd)
236 {
237 return --index & (n_bd - 1);
238 }
239
240 static inline int x2_queue_used(const struct iwl_queue *q, int i)
241 {
242 return q->first_empty > q->last_used ?
243 (i >= q->last_used && i < q->first_empty) :
244 !(i < q->last_used && i >= q->first_empty);
245 }
246
247 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
248 {
249 if (is_huge)
250 return q->n_window;
251
252 return index & (q->n_window - 1);
253 }
254
255 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
256 int count, int slots_num, u32 id)
257 {
258 q->n_bd = count;
259 q->n_window = slots_num;
260 q->id = id;
261
262 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
263 * and iwl_queue_dec_wrap are broken. */
264 BUG_ON(!is_power_of_2(count));
265
266 /* slots_num must be power-of-two size, otherwise
267 * get_cmd_index is broken. */
268 BUG_ON(!is_power_of_2(slots_num));
269
270 q->low_mark = q->n_window / 4;
271 if (q->low_mark < 4)
272 q->low_mark = 4;
273
274 q->high_mark = q->n_window / 8;
275 if (q->high_mark < 2)
276 q->high_mark = 2;
277
278 q->first_empty = q->last_used = 0;
279
280 return 0;
281 }
282
283 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
284 struct iwl_tx_queue *txq, u32 id)
285 {
286 struct pci_dev *dev = priv->pci_dev;
287
288 if (id != IWL_CMD_QUEUE_NUM) {
289 txq->txb = kmalloc(sizeof(txq->txb[0]) *
290 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
291 if (!txq->txb) {
292 IWL_ERROR("kmalloc for auxilary BD "
293 "structures failed\n");
294 goto error;
295 }
296 } else
297 txq->txb = NULL;
298
299 txq->bd = pci_alloc_consistent(dev,
300 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
301 &txq->q.dma_addr);
302
303 if (!txq->bd) {
304 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
305 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
306 goto error;
307 }
308 txq->q.id = id;
309
310 return 0;
311
312 error:
313 if (txq->txb) {
314 kfree(txq->txb);
315 txq->txb = NULL;
316 }
317
318 return -ENOMEM;
319 }
320
321 int iwl_tx_queue_init(struct iwl_priv *priv,
322 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
323 {
324 struct pci_dev *dev = priv->pci_dev;
325 int len;
326 int rc = 0;
327
328 /* alocate command space + one big command for scan since scan
329 * command is very huge the system will not have two scan at the
330 * same time */
331 len = sizeof(struct iwl_cmd) * slots_num;
332 if (txq_id == IWL_CMD_QUEUE_NUM)
333 len += IWL_MAX_SCAN_SIZE;
334 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
335 if (!txq->cmd)
336 return -ENOMEM;
337
338 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
339 if (rc) {
340 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
341
342 return -ENOMEM;
343 }
344 txq->need_update = 0;
345
346 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
347 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
348 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
349 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
350
351 iwl_hw_tx_queue_init(priv, txq);
352
353 return 0;
354 }
355
356 /**
357 * iwl_tx_queue_free - Deallocate DMA queue.
358 * @txq: Transmit queue to deallocate.
359 *
360 * Empty queue by removing and destroying all BD's.
361 * Free all buffers. txq itself is not freed.
362 *
363 */
364 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
365 {
366 struct iwl_queue *q = &txq->q;
367 struct pci_dev *dev = priv->pci_dev;
368 int len;
369
370 if (q->n_bd == 0)
371 return;
372
373 /* first, empty all BD's */
374 for (; q->first_empty != q->last_used;
375 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
376 iwl_hw_txq_free_tfd(priv, txq);
377
378 len = sizeof(struct iwl_cmd) * q->n_window;
379 if (q->id == IWL_CMD_QUEUE_NUM)
380 len += IWL_MAX_SCAN_SIZE;
381
382 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
383
384 /* free buffers belonging to queue itself */
385 if (txq->q.n_bd)
386 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
387 txq->q.n_bd, txq->bd, txq->q.dma_addr);
388
389 if (txq->txb) {
390 kfree(txq->txb);
391 txq->txb = NULL;
392 }
393
394 /* 0 fill whole structure */
395 memset(txq, 0, sizeof(*txq));
396 }
397
398 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
399
400 /*************** STATION TABLE MANAGEMENT ****
401 *
402 * NOTE: This needs to be overhauled to better synchronize between
403 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
404 *
405 * mac80211 should also be examined to determine if sta_info is duplicating
406 * the functionality provided here
407 */
408
409 /**************************************************************/
410 #if 0 /* temparary disable till we add real remove station */
411 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
412 {
413 int index = IWL_INVALID_STATION;
414 int i;
415 unsigned long flags;
416
417 spin_lock_irqsave(&priv->sta_lock, flags);
418
419 if (is_ap)
420 index = IWL_AP_ID;
421 else if (is_broadcast_ether_addr(addr))
422 index = priv->hw_setting.bcast_sta_id;
423 else
424 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
425 if (priv->stations[i].used &&
426 !compare_ether_addr(priv->stations[i].sta.sta.addr,
427 addr)) {
428 index = i;
429 break;
430 }
431
432 if (unlikely(index == IWL_INVALID_STATION))
433 goto out;
434
435 if (priv->stations[index].used) {
436 priv->stations[index].used = 0;
437 priv->num_stations--;
438 }
439
440 BUG_ON(priv->num_stations < 0);
441
442 out:
443 spin_unlock_irqrestore(&priv->sta_lock, flags);
444 return 0;
445 }
446 #endif
447 static void iwl_clear_stations_table(struct iwl_priv *priv)
448 {
449 unsigned long flags;
450
451 spin_lock_irqsave(&priv->sta_lock, flags);
452
453 priv->num_stations = 0;
454 memset(priv->stations, 0, sizeof(priv->stations));
455
456 spin_unlock_irqrestore(&priv->sta_lock, flags);
457 }
458
459
460 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
461 {
462 int i;
463 int index = IWL_INVALID_STATION;
464 struct iwl_station_entry *station;
465 unsigned long flags_spin;
466 DECLARE_MAC_BUF(mac);
467 u8 rate;
468
469 spin_lock_irqsave(&priv->sta_lock, flags_spin);
470 if (is_ap)
471 index = IWL_AP_ID;
472 else if (is_broadcast_ether_addr(addr))
473 index = priv->hw_setting.bcast_sta_id;
474 else
475 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
476 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
477 addr)) {
478 index = i;
479 break;
480 }
481
482 if (!priv->stations[i].used &&
483 index == IWL_INVALID_STATION)
484 index = i;
485 }
486
487 /* These twh conditions has the same outcome but keep them separate
488 since they have different meaning */
489 if (unlikely(index == IWL_INVALID_STATION)) {
490 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
491 return index;
492 }
493
494 if (priv->stations[index].used &&
495 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
496 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
497 return index;
498 }
499
500 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
501 station = &priv->stations[index];
502 station->used = 1;
503 priv->num_stations++;
504
505 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
506 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
507 station->sta.mode = 0;
508 station->sta.sta.sta_id = index;
509 station->sta.station_flags = 0;
510
511 rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
512 IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
513
514 /* Turn on both antennas for the station... */
515 station->sta.rate_n_flags =
516 iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
517 station->current_rate.rate_n_flags =
518 le16_to_cpu(station->sta.rate_n_flags);
519
520 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
521 iwl_send_add_station(priv, &station->sta, flags);
522 return index;
523
524 }
525
526 /*************** DRIVER STATUS FUNCTIONS *****/
527
528 static inline int iwl_is_ready(struct iwl_priv *priv)
529 {
530 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
531 * set but EXIT_PENDING is not */
532 return test_bit(STATUS_READY, &priv->status) &&
533 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
534 !test_bit(STATUS_EXIT_PENDING, &priv->status);
535 }
536
537 static inline int iwl_is_alive(struct iwl_priv *priv)
538 {
539 return test_bit(STATUS_ALIVE, &priv->status);
540 }
541
542 static inline int iwl_is_init(struct iwl_priv *priv)
543 {
544 return test_bit(STATUS_INIT, &priv->status);
545 }
546
547 static inline int iwl_is_rfkill(struct iwl_priv *priv)
548 {
549 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
550 test_bit(STATUS_RF_KILL_SW, &priv->status);
551 }
552
553 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
554 {
555
556 if (iwl_is_rfkill(priv))
557 return 0;
558
559 return iwl_is_ready(priv);
560 }
561
562 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
563
564 #define IWL_CMD(x) case x : return #x
565
566 static const char *get_cmd_string(u8 cmd)
567 {
568 switch (cmd) {
569 IWL_CMD(REPLY_ALIVE);
570 IWL_CMD(REPLY_ERROR);
571 IWL_CMD(REPLY_RXON);
572 IWL_CMD(REPLY_RXON_ASSOC);
573 IWL_CMD(REPLY_QOS_PARAM);
574 IWL_CMD(REPLY_RXON_TIMING);
575 IWL_CMD(REPLY_ADD_STA);
576 IWL_CMD(REPLY_REMOVE_STA);
577 IWL_CMD(REPLY_REMOVE_ALL_STA);
578 IWL_CMD(REPLY_3945_RX);
579 IWL_CMD(REPLY_TX);
580 IWL_CMD(REPLY_RATE_SCALE);
581 IWL_CMD(REPLY_LEDS_CMD);
582 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
583 IWL_CMD(RADAR_NOTIFICATION);
584 IWL_CMD(REPLY_QUIET_CMD);
585 IWL_CMD(REPLY_CHANNEL_SWITCH);
586 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
587 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
588 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
589 IWL_CMD(POWER_TABLE_CMD);
590 IWL_CMD(PM_SLEEP_NOTIFICATION);
591 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
592 IWL_CMD(REPLY_SCAN_CMD);
593 IWL_CMD(REPLY_SCAN_ABORT_CMD);
594 IWL_CMD(SCAN_START_NOTIFICATION);
595 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
596 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
597 IWL_CMD(BEACON_NOTIFICATION);
598 IWL_CMD(REPLY_TX_BEACON);
599 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
600 IWL_CMD(QUIET_NOTIFICATION);
601 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
602 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
603 IWL_CMD(REPLY_BT_CONFIG);
604 IWL_CMD(REPLY_STATISTICS_CMD);
605 IWL_CMD(STATISTICS_NOTIFICATION);
606 IWL_CMD(REPLY_CARD_STATE_CMD);
607 IWL_CMD(CARD_STATE_NOTIFICATION);
608 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
609 default:
610 return "UNKNOWN";
611
612 }
613 }
614
615 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
616
617 /**
618 * iwl_enqueue_hcmd - enqueue a uCode command
619 * @priv: device private data point
620 * @cmd: a point to the ucode command structure
621 *
622 * The function returns < 0 values to indicate the operation is
623 * failed. On success, it turns the index (> 0) of command in the
624 * command queue.
625 */
626 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
627 {
628 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
629 struct iwl_queue *q = &txq->q;
630 struct iwl_tfd_frame *tfd;
631 u32 *control_flags;
632 struct iwl_cmd *out_cmd;
633 u32 idx;
634 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
635 dma_addr_t phys_addr;
636 int pad;
637 u16 count;
638 int ret;
639 unsigned long flags;
640
641 /* If any of the command structures end up being larger than
642 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
643 * we will need to increase the size of the TFD entries */
644 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
645 !(cmd->meta.flags & CMD_SIZE_HUGE));
646
647 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
648 IWL_ERROR("No space for Tx\n");
649 return -ENOSPC;
650 }
651
652 spin_lock_irqsave(&priv->hcmd_lock, flags);
653
654 tfd = &txq->bd[q->first_empty];
655 memset(tfd, 0, sizeof(*tfd));
656
657 control_flags = (u32 *) tfd;
658
659 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
660 out_cmd = &txq->cmd[idx];
661
662 out_cmd->hdr.cmd = cmd->id;
663 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
664 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
665
666 /* At this point, the out_cmd now has all of the incoming cmd
667 * information */
668
669 out_cmd->hdr.flags = 0;
670 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
671 INDEX_TO_SEQ(q->first_empty));
672 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
673 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
674
675 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
676 offsetof(struct iwl_cmd, hdr);
677 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
678
679 pad = U32_PAD(cmd->len);
680 count = TFD_CTL_COUNT_GET(*control_flags);
681 *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
682
683 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
684 "%d bytes at %d[%d]:%d\n",
685 get_cmd_string(out_cmd->hdr.cmd),
686 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
687 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
688
689 txq->need_update = 1;
690 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
691 ret = iwl_tx_queue_update_write_ptr(priv, txq);
692
693 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
694 return ret ? ret : idx;
695 }
696
697 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
698 {
699 int ret;
700
701 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
702
703 /* An asynchronous command can not expect an SKB to be set. */
704 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
705
706 /* An asynchronous command MUST have a callback. */
707 BUG_ON(!cmd->meta.u.callback);
708
709 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
710 return -EBUSY;
711
712 ret = iwl_enqueue_hcmd(priv, cmd);
713 if (ret < 0) {
714 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
715 get_cmd_string(cmd->id), ret);
716 return ret;
717 }
718 return 0;
719 }
720
721 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
722 {
723 int cmd_idx;
724 int ret;
725 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
726
727 BUG_ON(cmd->meta.flags & CMD_ASYNC);
728
729 /* A synchronous command can not have a callback set. */
730 BUG_ON(cmd->meta.u.callback != NULL);
731
732 if (atomic_xchg(&entry, 1)) {
733 IWL_ERROR("Error sending %s: Already sending a host command\n",
734 get_cmd_string(cmd->id));
735 return -EBUSY;
736 }
737
738 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
739
740 if (cmd->meta.flags & CMD_WANT_SKB)
741 cmd->meta.source = &cmd->meta;
742
743 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
744 if (cmd_idx < 0) {
745 ret = cmd_idx;
746 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
747 get_cmd_string(cmd->id), ret);
748 goto out;
749 }
750
751 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
752 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
753 HOST_COMPLETE_TIMEOUT);
754 if (!ret) {
755 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
756 IWL_ERROR("Error sending %s: time out after %dms.\n",
757 get_cmd_string(cmd->id),
758 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
759
760 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
761 ret = -ETIMEDOUT;
762 goto cancel;
763 }
764 }
765
766 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
767 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
768 get_cmd_string(cmd->id));
769 ret = -ECANCELED;
770 goto fail;
771 }
772 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
773 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
774 get_cmd_string(cmd->id));
775 ret = -EIO;
776 goto fail;
777 }
778 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
779 IWL_ERROR("Error: Response NULL in '%s'\n",
780 get_cmd_string(cmd->id));
781 ret = -EIO;
782 goto out;
783 }
784
785 ret = 0;
786 goto out;
787
788 cancel:
789 if (cmd->meta.flags & CMD_WANT_SKB) {
790 struct iwl_cmd *qcmd;
791
792 /* Cancel the CMD_WANT_SKB flag for the cmd in the
793 * TX cmd queue. Otherwise in case the cmd comes
794 * in later, it will possibly set an invalid
795 * address (cmd->meta.source). */
796 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
797 qcmd->meta.flags &= ~CMD_WANT_SKB;
798 }
799 fail:
800 if (cmd->meta.u.skb) {
801 dev_kfree_skb_any(cmd->meta.u.skb);
802 cmd->meta.u.skb = NULL;
803 }
804 out:
805 atomic_set(&entry, 0);
806 return ret;
807 }
808
809 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
810 {
811 /* A command can not be asynchronous AND expect an SKB to be set. */
812 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
813 (cmd->meta.flags & CMD_WANT_SKB));
814
815 if (cmd->meta.flags & CMD_ASYNC)
816 return iwl_send_cmd_async(priv, cmd);
817
818 return iwl_send_cmd_sync(priv, cmd);
819 }
820
821 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
822 {
823 struct iwl_host_cmd cmd = {
824 .id = id,
825 .len = len,
826 .data = data,
827 };
828
829 return iwl_send_cmd_sync(priv, &cmd);
830 }
831
832 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
833 {
834 struct iwl_host_cmd cmd = {
835 .id = id,
836 .len = sizeof(val),
837 .data = &val,
838 };
839
840 return iwl_send_cmd_sync(priv, &cmd);
841 }
842
843 int iwl_send_statistics_request(struct iwl_priv *priv)
844 {
845 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
846 }
847
848 /**
849 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
850 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
851 * @channel: Any channel valid for the requested phymode
852
853 * In addition to setting the staging RXON, priv->phymode is also set.
854 *
855 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
856 * in the staging RXON flag structure based on the phymode
857 */
858 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
859 {
860 if (!iwl_get_channel_info(priv, phymode, channel)) {
861 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
862 channel, phymode);
863 return -EINVAL;
864 }
865
866 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
867 (priv->phymode == phymode))
868 return 0;
869
870 priv->staging_rxon.channel = cpu_to_le16(channel);
871 if (phymode == MODE_IEEE80211A)
872 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
873 else
874 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
875
876 priv->phymode = phymode;
877
878 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
879
880 return 0;
881 }
882
883 /**
884 * iwl_check_rxon_cmd - validate RXON structure is valid
885 *
886 * NOTE: This is really only useful during development and can eventually
887 * be #ifdef'd out once the driver is stable and folks aren't actively
888 * making changes
889 */
890 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
891 {
892 int error = 0;
893 int counter = 1;
894
895 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
896 error |= le32_to_cpu(rxon->flags &
897 (RXON_FLG_TGJ_NARROW_BAND_MSK |
898 RXON_FLG_RADAR_DETECT_MSK));
899 if (error)
900 IWL_WARNING("check 24G fields %d | %d\n",
901 counter++, error);
902 } else {
903 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
904 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
905 if (error)
906 IWL_WARNING("check 52 fields %d | %d\n",
907 counter++, error);
908 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
909 if (error)
910 IWL_WARNING("check 52 CCK %d | %d\n",
911 counter++, error);
912 }
913 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
914 if (error)
915 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
916
917 /* make sure basic rates 6Mbps and 1Mbps are supported */
918 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
919 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
920 if (error)
921 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
922
923 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
924 if (error)
925 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
926
927 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
928 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
929 if (error)
930 IWL_WARNING("check CCK and short slot %d | %d\n",
931 counter++, error);
932
933 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
934 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
935 if (error)
936 IWL_WARNING("check CCK & auto detect %d | %d\n",
937 counter++, error);
938
939 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
940 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
941 if (error)
942 IWL_WARNING("check TGG and auto detect %d | %d\n",
943 counter++, error);
944
945 if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
946 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
947 RXON_FLG_ANT_A_MSK)) == 0);
948 if (error)
949 IWL_WARNING("check antenna %d %d\n", counter++, error);
950
951 if (error)
952 IWL_WARNING("Tuning to channel %d\n",
953 le16_to_cpu(rxon->channel));
954
955 if (error) {
956 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
957 return -1;
958 }
959 return 0;
960 }
961
962 /**
963 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
964 * @priv: staging_rxon is comapred to active_rxon
965 *
966 * If the RXON structure is changing sufficient to require a new
967 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
968 * to indicate a new tune is required.
969 */
970 static int iwl_full_rxon_required(struct iwl_priv *priv)
971 {
972
973 /* These items are only settable from the full RXON command */
974 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
975 compare_ether_addr(priv->staging_rxon.bssid_addr,
976 priv->active_rxon.bssid_addr) ||
977 compare_ether_addr(priv->staging_rxon.node_addr,
978 priv->active_rxon.node_addr) ||
979 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
980 priv->active_rxon.wlap_bssid_addr) ||
981 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
982 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
983 (priv->staging_rxon.air_propagation !=
984 priv->active_rxon.air_propagation) ||
985 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
986 return 1;
987
988 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
989 * be updated with the RXON_ASSOC command -- however only some
990 * flag transitions are allowed using RXON_ASSOC */
991
992 /* Check if we are not switching bands */
993 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
994 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
995 return 1;
996
997 /* Check if we are switching association toggle */
998 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
999 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1000 return 1;
1001
1002 return 0;
1003 }
1004
1005 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1006 {
1007 int rc = 0;
1008 struct iwl_rx_packet *res = NULL;
1009 struct iwl_rxon_assoc_cmd rxon_assoc;
1010 struct iwl_host_cmd cmd = {
1011 .id = REPLY_RXON_ASSOC,
1012 .len = sizeof(rxon_assoc),
1013 .meta.flags = CMD_WANT_SKB,
1014 .data = &rxon_assoc,
1015 };
1016 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1017 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1018
1019 if ((rxon1->flags == rxon2->flags) &&
1020 (rxon1->filter_flags == rxon2->filter_flags) &&
1021 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1022 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1023 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1024 return 0;
1025 }
1026
1027 rxon_assoc.flags = priv->staging_rxon.flags;
1028 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1029 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1030 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1031 rxon_assoc.reserved = 0;
1032
1033 rc = iwl_send_cmd_sync(priv, &cmd);
1034 if (rc)
1035 return rc;
1036
1037 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1038 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1039 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1040 rc = -EIO;
1041 }
1042
1043 priv->alloc_rxb_skb--;
1044 dev_kfree_skb_any(cmd.meta.u.skb);
1045
1046 return rc;
1047 }
1048
1049 /**
1050 * iwl_commit_rxon - commit staging_rxon to hardware
1051 *
1052 * The RXON command in staging_rxon is commited to the hardware and
1053 * the active_rxon structure is updated with the new data. This
1054 * function correctly transitions out of the RXON_ASSOC_MSK state if
1055 * a HW tune is required based on the RXON structure changes.
1056 */
1057 static int iwl_commit_rxon(struct iwl_priv *priv)
1058 {
1059 /* cast away the const for active_rxon in this function */
1060 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1061 int rc = 0;
1062 DECLARE_MAC_BUF(mac);
1063
1064 if (!iwl_is_alive(priv))
1065 return -1;
1066
1067 /* always get timestamp with Rx frame */
1068 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1069
1070 /* select antenna */
1071 priv->staging_rxon.flags &=
1072 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1073 priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1074
1075 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1076 if (rc) {
1077 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1078 return -EINVAL;
1079 }
1080
1081 /* If we don't need to send a full RXON, we can use
1082 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1083 * and other flags for the current radio configuration. */
1084 if (!iwl_full_rxon_required(priv)) {
1085 rc = iwl_send_rxon_assoc(priv);
1086 if (rc) {
1087 IWL_ERROR("Error setting RXON_ASSOC "
1088 "configuration (%d).\n", rc);
1089 return rc;
1090 }
1091
1092 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1093
1094 return 0;
1095 }
1096
1097 /* If we are currently associated and the new config requires
1098 * an RXON_ASSOC and the new config wants the associated mask enabled,
1099 * we must clear the associated from the active configuration
1100 * before we apply the new config */
1101 if (iwl_is_associated(priv) &&
1102 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1103 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1104 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1105
1106 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1107 sizeof(struct iwl_rxon_cmd),
1108 &priv->active_rxon);
1109
1110 /* If the mask clearing failed then we set
1111 * active_rxon back to what it was previously */
1112 if (rc) {
1113 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1114 IWL_ERROR("Error clearing ASSOC_MSK on current "
1115 "configuration (%d).\n", rc);
1116 return rc;
1117 }
1118 }
1119
1120 IWL_DEBUG_INFO("Sending RXON\n"
1121 "* with%s RXON_FILTER_ASSOC_MSK\n"
1122 "* channel = %d\n"
1123 "* bssid = %s\n",
1124 ((priv->staging_rxon.filter_flags &
1125 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1126 le16_to_cpu(priv->staging_rxon.channel),
1127 print_mac(mac, priv->staging_rxon.bssid_addr));
1128
1129 /* Apply the new configuration */
1130 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1131 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1132 if (rc) {
1133 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1134 return rc;
1135 }
1136
1137 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1138
1139 iwl_clear_stations_table(priv);
1140
1141 /* If we issue a new RXON command which required a tune then we must
1142 * send a new TXPOWER command or we won't be able to Tx any frames */
1143 rc = iwl_hw_reg_send_txpower(priv);
1144 if (rc) {
1145 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1146 return rc;
1147 }
1148
1149 /* Add the broadcast address so we can send broadcast frames */
1150 if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
1151 IWL_INVALID_STATION) {
1152 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1153 return -EIO;
1154 }
1155
1156 /* If we have set the ASSOC_MSK and we are in BSS mode then
1157 * add the IWL_AP_ID to the station rate table */
1158 if (iwl_is_associated(priv) &&
1159 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1160 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1161 == IWL_INVALID_STATION) {
1162 IWL_ERROR("Error adding AP address for transmit.\n");
1163 return -EIO;
1164 }
1165
1166 /* Init the hardware's rate fallback order based on the
1167 * phymode */
1168 rc = iwl3945_init_hw_rate_table(priv);
1169 if (rc) {
1170 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1171 return -EIO;
1172 }
1173
1174 return 0;
1175 }
1176
1177 static int iwl_send_bt_config(struct iwl_priv *priv)
1178 {
1179 struct iwl_bt_cmd bt_cmd = {
1180 .flags = 3,
1181 .lead_time = 0xAA,
1182 .max_kill = 1,
1183 .kill_ack_mask = 0,
1184 .kill_cts_mask = 0,
1185 };
1186
1187 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1188 sizeof(struct iwl_bt_cmd), &bt_cmd);
1189 }
1190
1191 static int iwl_send_scan_abort(struct iwl_priv *priv)
1192 {
1193 int rc = 0;
1194 struct iwl_rx_packet *res;
1195 struct iwl_host_cmd cmd = {
1196 .id = REPLY_SCAN_ABORT_CMD,
1197 .meta.flags = CMD_WANT_SKB,
1198 };
1199
1200 /* If there isn't a scan actively going on in the hardware
1201 * then we are in between scan bands and not actually
1202 * actively scanning, so don't send the abort command */
1203 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1204 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1205 return 0;
1206 }
1207
1208 rc = iwl_send_cmd_sync(priv, &cmd);
1209 if (rc) {
1210 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1211 return rc;
1212 }
1213
1214 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1215 if (res->u.status != CAN_ABORT_STATUS) {
1216 /* The scan abort will return 1 for success or
1217 * 2 for "failure". A failure condition can be
1218 * due to simply not being in an active scan which
1219 * can occur if we send the scan abort before we
1220 * the microcode has notified us that a scan is
1221 * completed. */
1222 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1223 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1224 clear_bit(STATUS_SCAN_HW, &priv->status);
1225 }
1226
1227 dev_kfree_skb_any(cmd.meta.u.skb);
1228
1229 return rc;
1230 }
1231
1232 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1233 struct iwl_cmd *cmd,
1234 struct sk_buff *skb)
1235 {
1236 return 1;
1237 }
1238
1239 /*
1240 * CARD_STATE_CMD
1241 *
1242 * Use: Sets the internal card state to enable, disable, or halt
1243 *
1244 * When in the 'enable' state the card operates as normal.
1245 * When in the 'disable' state, the card enters into a low power mode.
1246 * When in the 'halt' state, the card is shut down and must be fully
1247 * restarted to come back on.
1248 */
1249 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1250 {
1251 struct iwl_host_cmd cmd = {
1252 .id = REPLY_CARD_STATE_CMD,
1253 .len = sizeof(u32),
1254 .data = &flags,
1255 .meta.flags = meta_flag,
1256 };
1257
1258 if (meta_flag & CMD_ASYNC)
1259 cmd.meta.u.callback = iwl_card_state_sync_callback;
1260
1261 return iwl_send_cmd(priv, &cmd);
1262 }
1263
1264 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1265 struct iwl_cmd *cmd, struct sk_buff *skb)
1266 {
1267 struct iwl_rx_packet *res = NULL;
1268
1269 if (!skb) {
1270 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1271 return 1;
1272 }
1273
1274 res = (struct iwl_rx_packet *)skb->data;
1275 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1276 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1277 res->hdr.flags);
1278 return 1;
1279 }
1280
1281 switch (res->u.add_sta.status) {
1282 case ADD_STA_SUCCESS_MSK:
1283 break;
1284 default:
1285 break;
1286 }
1287
1288 /* We didn't cache the SKB; let the caller free it */
1289 return 1;
1290 }
1291
1292 int iwl_send_add_station(struct iwl_priv *priv,
1293 struct iwl_addsta_cmd *sta, u8 flags)
1294 {
1295 struct iwl_rx_packet *res = NULL;
1296 int rc = 0;
1297 struct iwl_host_cmd cmd = {
1298 .id = REPLY_ADD_STA,
1299 .len = sizeof(struct iwl_addsta_cmd),
1300 .meta.flags = flags,
1301 .data = sta,
1302 };
1303
1304 if (flags & CMD_ASYNC)
1305 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1306 else
1307 cmd.meta.flags |= CMD_WANT_SKB;
1308
1309 rc = iwl_send_cmd(priv, &cmd);
1310
1311 if (rc || (flags & CMD_ASYNC))
1312 return rc;
1313
1314 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1315 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1316 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1317 res->hdr.flags);
1318 rc = -EIO;
1319 }
1320
1321 if (rc == 0) {
1322 switch (res->u.add_sta.status) {
1323 case ADD_STA_SUCCESS_MSK:
1324 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1325 break;
1326 default:
1327 rc = -EIO;
1328 IWL_WARNING("REPLY_ADD_STA failed\n");
1329 break;
1330 }
1331 }
1332
1333 priv->alloc_rxb_skb--;
1334 dev_kfree_skb_any(cmd.meta.u.skb);
1335
1336 return rc;
1337 }
1338
1339 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1340 struct ieee80211_key_conf *keyconf,
1341 u8 sta_id)
1342 {
1343 unsigned long flags;
1344 __le16 key_flags = 0;
1345
1346 switch (keyconf->alg) {
1347 case ALG_CCMP:
1348 key_flags |= STA_KEY_FLG_CCMP;
1349 key_flags |= cpu_to_le16(
1350 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1351 key_flags &= ~STA_KEY_FLG_INVALID;
1352 break;
1353 case ALG_TKIP:
1354 case ALG_WEP:
1355 return -EINVAL;
1356 default:
1357 return -EINVAL;
1358 }
1359 spin_lock_irqsave(&priv->sta_lock, flags);
1360 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1361 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1362 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1363 keyconf->keylen);
1364
1365 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1366 keyconf->keylen);
1367 priv->stations[sta_id].sta.key.key_flags = key_flags;
1368 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1369 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1370
1371 spin_unlock_irqrestore(&priv->sta_lock, flags);
1372
1373 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1374 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1375 return 0;
1376 }
1377
1378 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1379 {
1380 unsigned long flags;
1381
1382 spin_lock_irqsave(&priv->sta_lock, flags);
1383 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1384 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1385 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1386 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1387 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1388 spin_unlock_irqrestore(&priv->sta_lock, flags);
1389
1390 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1391 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1392 return 0;
1393 }
1394
1395 static void iwl_clear_free_frames(struct iwl_priv *priv)
1396 {
1397 struct list_head *element;
1398
1399 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1400 priv->frames_count);
1401
1402 while (!list_empty(&priv->free_frames)) {
1403 element = priv->free_frames.next;
1404 list_del(element);
1405 kfree(list_entry(element, struct iwl_frame, list));
1406 priv->frames_count--;
1407 }
1408
1409 if (priv->frames_count) {
1410 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1411 priv->frames_count);
1412 priv->frames_count = 0;
1413 }
1414 }
1415
1416 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1417 {
1418 struct iwl_frame *frame;
1419 struct list_head *element;
1420 if (list_empty(&priv->free_frames)) {
1421 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1422 if (!frame) {
1423 IWL_ERROR("Could not allocate frame!\n");
1424 return NULL;
1425 }
1426
1427 priv->frames_count++;
1428 return frame;
1429 }
1430
1431 element = priv->free_frames.next;
1432 list_del(element);
1433 return list_entry(element, struct iwl_frame, list);
1434 }
1435
1436 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1437 {
1438 memset(frame, 0, sizeof(*frame));
1439 list_add(&frame->list, &priv->free_frames);
1440 }
1441
1442 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1443 struct ieee80211_hdr *hdr,
1444 const u8 *dest, int left)
1445 {
1446
1447 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1448 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1449 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1450 return 0;
1451
1452 if (priv->ibss_beacon->len > left)
1453 return 0;
1454
1455 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1456
1457 return priv->ibss_beacon->len;
1458 }
1459
1460 static int iwl_rate_index_from_plcp(int plcp)
1461 {
1462 int i = 0;
1463
1464 for (i = 0; i < IWL_RATE_COUNT; i++)
1465 if (iwl_rates[i].plcp == plcp)
1466 return i;
1467 return -1;
1468 }
1469
1470 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1471 {
1472 u8 i;
1473
1474 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1475 i = iwl_rates[i].next_ieee) {
1476 if (rate_mask & (1 << i))
1477 return iwl_rates[i].plcp;
1478 }
1479
1480 return IWL_RATE_INVALID;
1481 }
1482
1483 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1484 {
1485 struct iwl_frame *frame;
1486 unsigned int frame_size;
1487 int rc;
1488 u8 rate;
1489
1490 frame = iwl_get_free_frame(priv);
1491
1492 if (!frame) {
1493 IWL_ERROR("Could not obtain free frame buffer for beacon "
1494 "command.\n");
1495 return -ENOMEM;
1496 }
1497
1498 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1499 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1500 0xFF0);
1501 if (rate == IWL_INVALID_RATE)
1502 rate = IWL_RATE_6M_PLCP;
1503 } else {
1504 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1505 if (rate == IWL_INVALID_RATE)
1506 rate = IWL_RATE_1M_PLCP;
1507 }
1508
1509 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1510
1511 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1512 &frame->u.cmd[0]);
1513
1514 iwl_free_frame(priv, frame);
1515
1516 return rc;
1517 }
1518
1519 /******************************************************************************
1520 *
1521 * EEPROM related functions
1522 *
1523 ******************************************************************************/
1524
1525 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1526 {
1527 memcpy(mac, priv->eeprom.mac_address, 6);
1528 }
1529
1530 /**
1531 * iwl_eeprom_init - read EEPROM contents
1532 *
1533 * Load the EEPROM from adapter into priv->eeprom
1534 *
1535 * NOTE: This routine uses the non-debug IO access functions.
1536 */
1537 int iwl_eeprom_init(struct iwl_priv *priv)
1538 {
1539 u16 *e = (u16 *)&priv->eeprom;
1540 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1541 u32 r;
1542 int sz = sizeof(priv->eeprom);
1543 int rc;
1544 int i;
1545 u16 addr;
1546
1547 /* The EEPROM structure has several padding buffers within it
1548 * and when adding new EEPROM maps is subject to programmer errors
1549 * which may be very difficult to identify without explicitly
1550 * checking the resulting size of the eeprom map. */
1551 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1552
1553 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1554 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1555 return -ENOENT;
1556 }
1557
1558 rc = iwl_eeprom_aqcuire_semaphore(priv);
1559 if (rc < 0) {
1560 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1561 return -ENOENT;
1562 }
1563
1564 /* eeprom is an array of 16bit values */
1565 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1566 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1567 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1568
1569 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1570 i += IWL_EEPROM_ACCESS_DELAY) {
1571 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1572 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1573 break;
1574 udelay(IWL_EEPROM_ACCESS_DELAY);
1575 }
1576
1577 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1578 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1579 return -ETIMEDOUT;
1580 }
1581 e[addr / 2] = le16_to_cpu(r >> 16);
1582 }
1583
1584 return 0;
1585 }
1586
1587 /******************************************************************************
1588 *
1589 * Misc. internal state and helper functions
1590 *
1591 ******************************************************************************/
1592 #ifdef CONFIG_IWLWIFI_DEBUG
1593
1594 /**
1595 * iwl_report_frame - dump frame to syslog during debug sessions
1596 *
1597 * hack this function to show different aspects of received frames,
1598 * including selective frame dumps.
1599 * group100 parameter selects whether to show 1 out of 100 good frames.
1600 *
1601 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1602 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1603 * is 3945-specific and gives bad output for 4965. Need to split the
1604 * functionality, keep common stuff here.
1605 */
1606 void iwl_report_frame(struct iwl_priv *priv,
1607 struct iwl_rx_packet *pkt,
1608 struct ieee80211_hdr *header, int group100)
1609 {
1610 u32 to_us;
1611 u32 print_summary = 0;
1612 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1613 u32 hundred = 0;
1614 u32 dataframe = 0;
1615 u16 fc;
1616 u16 seq_ctl;
1617 u16 channel;
1618 u16 phy_flags;
1619 int rate_sym;
1620 u16 length;
1621 u16 status;
1622 u16 bcn_tmr;
1623 u32 tsf_low;
1624 u64 tsf;
1625 u8 rssi;
1626 u8 agc;
1627 u16 sig_avg;
1628 u16 noise_diff;
1629 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1630 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1631 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1632 u8 *data = IWL_RX_DATA(pkt);
1633
1634 /* MAC header */
1635 fc = le16_to_cpu(header->frame_control);
1636 seq_ctl = le16_to_cpu(header->seq_ctrl);
1637
1638 /* metadata */
1639 channel = le16_to_cpu(rx_hdr->channel);
1640 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1641 rate_sym = rx_hdr->rate;
1642 length = le16_to_cpu(rx_hdr->len);
1643
1644 /* end-of-frame status and timestamp */
1645 status = le32_to_cpu(rx_end->status);
1646 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1647 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1648 tsf = le64_to_cpu(rx_end->timestamp);
1649
1650 /* signal statistics */
1651 rssi = rx_stats->rssi;
1652 agc = rx_stats->agc;
1653 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1654 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1655
1656 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1657
1658 /* if data frame is to us and all is good,
1659 * (optionally) print summary for only 1 out of every 100 */
1660 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1661 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1662 dataframe = 1;
1663 if (!group100)
1664 print_summary = 1; /* print each frame */
1665 else if (priv->framecnt_to_us < 100) {
1666 priv->framecnt_to_us++;
1667 print_summary = 0;
1668 } else {
1669 priv->framecnt_to_us = 0;
1670 print_summary = 1;
1671 hundred = 1;
1672 }
1673 } else {
1674 /* print summary for all other frames */
1675 print_summary = 1;
1676 }
1677
1678 if (print_summary) {
1679 char *title;
1680 u32 rate;
1681
1682 if (hundred)
1683 title = "100Frames";
1684 else if (fc & IEEE80211_FCTL_RETRY)
1685 title = "Retry";
1686 else if (ieee80211_is_assoc_response(fc))
1687 title = "AscRsp";
1688 else if (ieee80211_is_reassoc_response(fc))
1689 title = "RasRsp";
1690 else if (ieee80211_is_probe_response(fc)) {
1691 title = "PrbRsp";
1692 print_dump = 1; /* dump frame contents */
1693 } else if (ieee80211_is_beacon(fc)) {
1694 title = "Beacon";
1695 print_dump = 1; /* dump frame contents */
1696 } else if (ieee80211_is_atim(fc))
1697 title = "ATIM";
1698 else if (ieee80211_is_auth(fc))
1699 title = "Auth";
1700 else if (ieee80211_is_deauth(fc))
1701 title = "DeAuth";
1702 else if (ieee80211_is_disassoc(fc))
1703 title = "DisAssoc";
1704 else
1705 title = "Frame";
1706
1707 rate = iwl_rate_index_from_plcp(rate_sym);
1708 if (rate == -1)
1709 rate = 0;
1710 else
1711 rate = iwl_rates[rate].ieee / 2;
1712
1713 /* print frame summary.
1714 * MAC addresses show just the last byte (for brevity),
1715 * but you can hack it to show more, if you'd like to. */
1716 if (dataframe)
1717 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1718 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1719 title, fc, header->addr1[5],
1720 length, rssi, channel, rate);
1721 else {
1722 /* src/dst addresses assume managed mode */
1723 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1724 "src=0x%02x, rssi=%u, tim=%lu usec, "
1725 "phy=0x%02x, chnl=%d\n",
1726 title, fc, header->addr1[5],
1727 header->addr3[5], rssi,
1728 tsf_low - priv->scan_start_tsf,
1729 phy_flags, channel);
1730 }
1731 }
1732 if (print_dump)
1733 iwl_print_hex_dump(IWL_DL_RX, data, length);
1734 }
1735 #endif
1736
1737 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1738 {
1739 if (priv->hw_setting.shared_virt)
1740 pci_free_consistent(priv->pci_dev,
1741 sizeof(struct iwl_shared),
1742 priv->hw_setting.shared_virt,
1743 priv->hw_setting.shared_phys);
1744 }
1745
1746 /**
1747 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1748 *
1749 * return : set the bit for each supported rate insert in ie
1750 */
1751 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1752 u16 basic_rate, int max_count)
1753 {
1754 u16 ret_rates = 0, bit;
1755 int i;
1756 u8 *rates;
1757
1758 rates = &(ie[1]);
1759
1760 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1761 if (bit & supported_rate) {
1762 ret_rates |= bit;
1763 rates[*ie] = iwl_rates[i].ieee |
1764 ((bit & basic_rate) ? 0x80 : 0x00);
1765 *ie = *ie + 1;
1766 if (*ie >= max_count)
1767 break;
1768 }
1769 }
1770
1771 return ret_rates;
1772 }
1773
1774 /**
1775 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1776 */
1777 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1778 struct ieee80211_mgmt *frame,
1779 int left, int is_direct)
1780 {
1781 int len = 0;
1782 u8 *pos = NULL;
1783 u16 ret_rates;
1784
1785 /* Make sure there is enough space for the probe request,
1786 * two mandatory IEs and the data */
1787 left -= 24;
1788 if (left < 0)
1789 return 0;
1790 len += 24;
1791
1792 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1793 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1794 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1795 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1796 frame->seq_ctrl = 0;
1797
1798 /* fill in our indirect SSID IE */
1799 /* ...next IE... */
1800
1801 left -= 2;
1802 if (left < 0)
1803 return 0;
1804 len += 2;
1805 pos = &(frame->u.probe_req.variable[0]);
1806 *pos++ = WLAN_EID_SSID;
1807 *pos++ = 0;
1808
1809 /* fill in our direct SSID IE... */
1810 if (is_direct) {
1811 /* ...next IE... */
1812 left -= 2 + priv->essid_len;
1813 if (left < 0)
1814 return 0;
1815 /* ... fill it in... */
1816 *pos++ = WLAN_EID_SSID;
1817 *pos++ = priv->essid_len;
1818 memcpy(pos, priv->essid, priv->essid_len);
1819 pos += priv->essid_len;
1820 len += 2 + priv->essid_len;
1821 }
1822
1823 /* fill in supported rate */
1824 /* ...next IE... */
1825 left -= 2;
1826 if (left < 0)
1827 return 0;
1828 /* ... fill it in... */
1829 *pos++ = WLAN_EID_SUPP_RATES;
1830 *pos = 0;
1831 ret_rates = priv->active_rate = priv->rates_mask;
1832 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1833
1834 iwl_supported_rate_to_ie(pos, priv->active_rate,
1835 priv->active_rate_basic, left);
1836 len += 2 + *pos;
1837 pos += (*pos) + 1;
1838 ret_rates = ~ret_rates & priv->active_rate;
1839
1840 if (ret_rates == 0)
1841 goto fill_end;
1842
1843 /* fill in supported extended rate */
1844 /* ...next IE... */
1845 left -= 2;
1846 if (left < 0)
1847 return 0;
1848 /* ... fill it in... */
1849 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1850 *pos = 0;
1851 iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1852 if (*pos > 0)
1853 len += 2 + *pos;
1854
1855 fill_end:
1856 return (u16)len;
1857 }
1858
1859 /*
1860 * QoS support
1861 */
1862 #ifdef CONFIG_IWLWIFI_QOS
1863 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1864 struct iwl_qosparam_cmd *qos)
1865 {
1866
1867 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1868 sizeof(struct iwl_qosparam_cmd), qos);
1869 }
1870
1871 static void iwl_reset_qos(struct iwl_priv *priv)
1872 {
1873 u16 cw_min = 15;
1874 u16 cw_max = 1023;
1875 u8 aifs = 2;
1876 u8 is_legacy = 0;
1877 unsigned long flags;
1878 int i;
1879
1880 spin_lock_irqsave(&priv->lock, flags);
1881 priv->qos_data.qos_active = 0;
1882
1883 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1884 if (priv->qos_data.qos_enable)
1885 priv->qos_data.qos_active = 1;
1886 if (!(priv->active_rate & 0xfff0)) {
1887 cw_min = 31;
1888 is_legacy = 1;
1889 }
1890 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1891 if (priv->qos_data.qos_enable)
1892 priv->qos_data.qos_active = 1;
1893 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1894 cw_min = 31;
1895 is_legacy = 1;
1896 }
1897
1898 if (priv->qos_data.qos_active)
1899 aifs = 3;
1900
1901 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1902 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1903 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1904 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1905 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1906
1907 if (priv->qos_data.qos_active) {
1908 i = 1;
1909 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1910 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1911 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1912 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1913 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1914
1915 i = 2;
1916 priv->qos_data.def_qos_parm.ac[i].cw_min =
1917 cpu_to_le16((cw_min + 1) / 2 - 1);
1918 priv->qos_data.def_qos_parm.ac[i].cw_max =
1919 cpu_to_le16(cw_max);
1920 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1921 if (is_legacy)
1922 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1923 cpu_to_le16(6016);
1924 else
1925 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1926 cpu_to_le16(3008);
1927 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1928
1929 i = 3;
1930 priv->qos_data.def_qos_parm.ac[i].cw_min =
1931 cpu_to_le16((cw_min + 1) / 4 - 1);
1932 priv->qos_data.def_qos_parm.ac[i].cw_max =
1933 cpu_to_le16((cw_max + 1) / 2 - 1);
1934 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1935 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1936 if (is_legacy)
1937 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1938 cpu_to_le16(3264);
1939 else
1940 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1941 cpu_to_le16(1504);
1942 } else {
1943 for (i = 1; i < 4; i++) {
1944 priv->qos_data.def_qos_parm.ac[i].cw_min =
1945 cpu_to_le16(cw_min);
1946 priv->qos_data.def_qos_parm.ac[i].cw_max =
1947 cpu_to_le16(cw_max);
1948 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1949 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1950 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1951 }
1952 }
1953 IWL_DEBUG_QOS("set QoS to default \n");
1954
1955 spin_unlock_irqrestore(&priv->lock, flags);
1956 }
1957
1958 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1959 {
1960 unsigned long flags;
1961
1962 if (priv == NULL)
1963 return;
1964
1965 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1966 return;
1967
1968 if (!priv->qos_data.qos_enable)
1969 return;
1970
1971 spin_lock_irqsave(&priv->lock, flags);
1972 priv->qos_data.def_qos_parm.qos_flags = 0;
1973
1974 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1975 !priv->qos_data.qos_cap.q_AP.txop_request)
1976 priv->qos_data.def_qos_parm.qos_flags |=
1977 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1978
1979 if (priv->qos_data.qos_active)
1980 priv->qos_data.def_qos_parm.qos_flags |=
1981 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1982
1983 spin_unlock_irqrestore(&priv->lock, flags);
1984
1985 if (force || iwl_is_associated(priv)) {
1986 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1987 priv->qos_data.qos_active);
1988
1989 iwl_send_qos_params_command(priv,
1990 &(priv->qos_data.def_qos_parm));
1991 }
1992 }
1993
1994 #endif /* CONFIG_IWLWIFI_QOS */
1995 /*
1996 * Power management (not Tx power!) functions
1997 */
1998 #define MSEC_TO_USEC 1024
1999
2000 #define NOSLP __constant_cpu_to_le32(0)
2001 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2002 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2003 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2004 __constant_cpu_to_le32(X1), \
2005 __constant_cpu_to_le32(X2), \
2006 __constant_cpu_to_le32(X3), \
2007 __constant_cpu_to_le32(X4)}
2008
2009
2010 /* default power management (not Tx power) table values */
2011 /* for tim 0-10 */
2012 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2013 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2014 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2015 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2016 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2017 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2018 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2019 };
2020
2021 /* for tim > 10 */
2022 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2023 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2024 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2025 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2026 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2027 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2028 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2029 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2030 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2031 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2032 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2033 };
2034
2035 int iwl_power_init_handle(struct iwl_priv *priv)
2036 {
2037 int rc = 0, i;
2038 struct iwl_power_mgr *pow_data;
2039 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2040 u16 pci_pm;
2041
2042 IWL_DEBUG_POWER("Initialize power \n");
2043
2044 pow_data = &(priv->power_data);
2045
2046 memset(pow_data, 0, sizeof(*pow_data));
2047
2048 pow_data->active_index = IWL_POWER_RANGE_0;
2049 pow_data->dtim_val = 0xffff;
2050
2051 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2052 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2053
2054 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2055 if (rc != 0)
2056 return 0;
2057 else {
2058 struct iwl_powertable_cmd *cmd;
2059
2060 IWL_DEBUG_POWER("adjust power command flags\n");
2061
2062 for (i = 0; i < IWL_POWER_AC; i++) {
2063 cmd = &pow_data->pwr_range_0[i].cmd;
2064
2065 if (pci_pm & 0x1)
2066 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2067 else
2068 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2069 }
2070 }
2071 return rc;
2072 }
2073
2074 static int iwl_update_power_cmd(struct iwl_priv *priv,
2075 struct iwl_powertable_cmd *cmd, u32 mode)
2076 {
2077 int rc = 0, i;
2078 u8 skip;
2079 u32 max_sleep = 0;
2080 struct iwl_power_vec_entry *range;
2081 u8 period = 0;
2082 struct iwl_power_mgr *pow_data;
2083
2084 if (mode > IWL_POWER_INDEX_5) {
2085 IWL_DEBUG_POWER("Error invalid power mode \n");
2086 return -1;
2087 }
2088 pow_data = &(priv->power_data);
2089
2090 if (pow_data->active_index == IWL_POWER_RANGE_0)
2091 range = &pow_data->pwr_range_0[0];
2092 else
2093 range = &pow_data->pwr_range_1[1];
2094
2095 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2096
2097 #ifdef IWL_MAC80211_DISABLE
2098 if (priv->assoc_network != NULL) {
2099 unsigned long flags;
2100
2101 period = priv->assoc_network->tim.tim_period;
2102 }
2103 #endif /*IWL_MAC80211_DISABLE */
2104 skip = range[mode].no_dtim;
2105
2106 if (period == 0) {
2107 period = 1;
2108 skip = 0;
2109 }
2110
2111 if (skip == 0) {
2112 max_sleep = period;
2113 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2114 } else {
2115 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2116 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2117 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2118 }
2119
2120 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2121 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2122 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2123 }
2124
2125 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2126 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2127 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2128 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2129 le32_to_cpu(cmd->sleep_interval[0]),
2130 le32_to_cpu(cmd->sleep_interval[1]),
2131 le32_to_cpu(cmd->sleep_interval[2]),
2132 le32_to_cpu(cmd->sleep_interval[3]),
2133 le32_to_cpu(cmd->sleep_interval[4]));
2134
2135 return rc;
2136 }
2137
2138 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2139 {
2140 u32 final_mode = mode;
2141 int rc;
2142 struct iwl_powertable_cmd cmd;
2143
2144 /* If on battery, set to 3,
2145 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2146 * else user level */
2147 switch (mode) {
2148 case IWL_POWER_BATTERY:
2149 final_mode = IWL_POWER_INDEX_3;
2150 break;
2151 case IWL_POWER_AC:
2152 final_mode = IWL_POWER_MODE_CAM;
2153 break;
2154 default:
2155 final_mode = mode;
2156 break;
2157 }
2158
2159 iwl_update_power_cmd(priv, &cmd, final_mode);
2160
2161 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2162
2163 if (final_mode == IWL_POWER_MODE_CAM)
2164 clear_bit(STATUS_POWER_PMI, &priv->status);
2165 else
2166 set_bit(STATUS_POWER_PMI, &priv->status);
2167
2168 return rc;
2169 }
2170
2171 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2172 {
2173 /* Filter incoming packets to determine if they are targeted toward
2174 * this network, discarding packets coming from ourselves */
2175 switch (priv->iw_mode) {
2176 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2177 /* packets from our adapter are dropped (echo) */
2178 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2179 return 0;
2180 /* {broad,multi}cast packets to our IBSS go through */
2181 if (is_multicast_ether_addr(header->addr1))
2182 return !compare_ether_addr(header->addr3, priv->bssid);
2183 /* packets to our adapter go through */
2184 return !compare_ether_addr(header->addr1, priv->mac_addr);
2185 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2186 /* packets from our adapter are dropped (echo) */
2187 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2188 return 0;
2189 /* {broad,multi}cast packets to our BSS go through */
2190 if (is_multicast_ether_addr(header->addr1))
2191 return !compare_ether_addr(header->addr2, priv->bssid);
2192 /* packets to our adapter go through */
2193 return !compare_ether_addr(header->addr1, priv->mac_addr);
2194 }
2195
2196 return 1;
2197 }
2198
2199 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2200
2201 const char *iwl_get_tx_fail_reason(u32 status)
2202 {
2203 switch (status & TX_STATUS_MSK) {
2204 case TX_STATUS_SUCCESS:
2205 return "SUCCESS";
2206 TX_STATUS_ENTRY(SHORT_LIMIT);
2207 TX_STATUS_ENTRY(LONG_LIMIT);
2208 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2209 TX_STATUS_ENTRY(MGMNT_ABORT);
2210 TX_STATUS_ENTRY(NEXT_FRAG);
2211 TX_STATUS_ENTRY(LIFE_EXPIRE);
2212 TX_STATUS_ENTRY(DEST_PS);
2213 TX_STATUS_ENTRY(ABORTED);
2214 TX_STATUS_ENTRY(BT_RETRY);
2215 TX_STATUS_ENTRY(STA_INVALID);
2216 TX_STATUS_ENTRY(FRAG_DROPPED);
2217 TX_STATUS_ENTRY(TID_DISABLE);
2218 TX_STATUS_ENTRY(FRAME_FLUSHED);
2219 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2220 TX_STATUS_ENTRY(TX_LOCKED);
2221 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2222 }
2223
2224 return "UNKNOWN";
2225 }
2226
2227 /**
2228 * iwl_scan_cancel - Cancel any currently executing HW scan
2229 *
2230 * NOTE: priv->mutex is not required before calling this function
2231 */
2232 static int iwl_scan_cancel(struct iwl_priv *priv)
2233 {
2234 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2235 clear_bit(STATUS_SCANNING, &priv->status);
2236 return 0;
2237 }
2238
2239 if (test_bit(STATUS_SCANNING, &priv->status)) {
2240 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2241 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2242 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2243 queue_work(priv->workqueue, &priv->abort_scan);
2244
2245 } else
2246 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2247
2248 return test_bit(STATUS_SCANNING, &priv->status);
2249 }
2250
2251 return 0;
2252 }
2253
2254 /**
2255 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2256 * @ms: amount of time to wait (in milliseconds) for scan to abort
2257 *
2258 * NOTE: priv->mutex must be held before calling this function
2259 */
2260 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2261 {
2262 unsigned long now = jiffies;
2263 int ret;
2264
2265 ret = iwl_scan_cancel(priv);
2266 if (ret && ms) {
2267 mutex_unlock(&priv->mutex);
2268 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2269 test_bit(STATUS_SCANNING, &priv->status))
2270 msleep(1);
2271 mutex_lock(&priv->mutex);
2272
2273 return test_bit(STATUS_SCANNING, &priv->status);
2274 }
2275
2276 return ret;
2277 }
2278
2279 static void iwl_sequence_reset(struct iwl_priv *priv)
2280 {
2281 /* Reset ieee stats */
2282
2283 /* We don't reset the net_device_stats (ieee->stats) on
2284 * re-association */
2285
2286 priv->last_seq_num = -1;
2287 priv->last_frag_num = -1;
2288 priv->last_packet_time = 0;
2289
2290 iwl_scan_cancel(priv);
2291 }
2292
2293 #define MAX_UCODE_BEACON_INTERVAL 1024
2294 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2295
2296 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2297 {
2298 u16 new_val = 0;
2299 u16 beacon_factor = 0;
2300
2301 beacon_factor =
2302 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2303 / MAX_UCODE_BEACON_INTERVAL;
2304 new_val = beacon_val / beacon_factor;
2305
2306 return cpu_to_le16(new_val);
2307 }
2308
2309 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2310 {
2311 u64 interval_tm_unit;
2312 u64 tsf, result;
2313 unsigned long flags;
2314 struct ieee80211_conf *conf = NULL;
2315 u16 beacon_int = 0;
2316
2317 conf = ieee80211_get_hw_conf(priv->hw);
2318
2319 spin_lock_irqsave(&priv->lock, flags);
2320 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2321 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2322
2323 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2324
2325 tsf = priv->timestamp1;
2326 tsf = ((tsf << 32) | priv->timestamp0);
2327
2328 beacon_int = priv->beacon_int;
2329 spin_unlock_irqrestore(&priv->lock, flags);
2330
2331 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2332 if (beacon_int == 0) {
2333 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2334 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2335 } else {
2336 priv->rxon_timing.beacon_interval =
2337 cpu_to_le16(beacon_int);
2338 priv->rxon_timing.beacon_interval =
2339 iwl_adjust_beacon_interval(
2340 le16_to_cpu(priv->rxon_timing.beacon_interval));
2341 }
2342
2343 priv->rxon_timing.atim_window = 0;
2344 } else {
2345 priv->rxon_timing.beacon_interval =
2346 iwl_adjust_beacon_interval(conf->beacon_int);
2347 /* TODO: we need to get atim_window from upper stack
2348 * for now we set to 0 */
2349 priv->rxon_timing.atim_window = 0;
2350 }
2351
2352 interval_tm_unit =
2353 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2354 result = do_div(tsf, interval_tm_unit);
2355 priv->rxon_timing.beacon_init_val =
2356 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2357
2358 IWL_DEBUG_ASSOC
2359 ("beacon interval %d beacon timer %d beacon tim %d\n",
2360 le16_to_cpu(priv->rxon_timing.beacon_interval),
2361 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2362 le16_to_cpu(priv->rxon_timing.atim_window));
2363 }
2364
2365 static int iwl_scan_initiate(struct iwl_priv *priv)
2366 {
2367 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2368 IWL_ERROR("APs don't scan.\n");
2369 return 0;
2370 }
2371
2372 if (!iwl_is_ready_rf(priv)) {
2373 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2374 return -EIO;
2375 }
2376
2377 if (test_bit(STATUS_SCANNING, &priv->status)) {
2378 IWL_DEBUG_SCAN("Scan already in progress.\n");
2379 return -EAGAIN;
2380 }
2381
2382 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2383 IWL_DEBUG_SCAN("Scan request while abort pending. "
2384 "Queuing.\n");
2385 return -EAGAIN;
2386 }
2387
2388 IWL_DEBUG_INFO("Starting scan...\n");
2389 priv->scan_bands = 2;
2390 set_bit(STATUS_SCANNING, &priv->status);
2391 priv->scan_start = jiffies;
2392 priv->scan_pass_start = priv->scan_start;
2393
2394 queue_work(priv->workqueue, &priv->request_scan);
2395
2396 return 0;
2397 }
2398
2399 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2400 {
2401 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2402
2403 if (hw_decrypt)
2404 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2405 else
2406 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2407
2408 return 0;
2409 }
2410
2411 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2412 {
2413 if (phymode == MODE_IEEE80211A) {
2414 priv->staging_rxon.flags &=
2415 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2416 | RXON_FLG_CCK_MSK);
2417 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2418 } else {
2419 /* Copied from iwl_bg_post_associate() */
2420 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2421 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2422 else
2423 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2424
2425 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2426 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2427
2428 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2429 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2430 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2431 }
2432 }
2433
2434 /*
2435 * initilize rxon structure with default values fromm eeprom
2436 */
2437 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2438 {
2439 const struct iwl_channel_info *ch_info;
2440
2441 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2442
2443 switch (priv->iw_mode) {
2444 case IEEE80211_IF_TYPE_AP:
2445 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2446 break;
2447
2448 case IEEE80211_IF_TYPE_STA:
2449 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2450 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2451 break;
2452
2453 case IEEE80211_IF_TYPE_IBSS:
2454 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2455 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2456 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2457 RXON_FILTER_ACCEPT_GRP_MSK;
2458 break;
2459
2460 case IEEE80211_IF_TYPE_MNTR:
2461 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2462 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2463 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2464 break;
2465 }
2466
2467 #if 0
2468 /* TODO: Figure out when short_preamble would be set and cache from
2469 * that */
2470 if (!hw_to_local(priv->hw)->short_preamble)
2471 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2472 else
2473 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2474 #endif
2475
2476 ch_info = iwl_get_channel_info(priv, priv->phymode,
2477 le16_to_cpu(priv->staging_rxon.channel));
2478
2479 if (!ch_info)
2480 ch_info = &priv->channel_info[0];
2481
2482 /*
2483 * in some case A channels are all non IBSS
2484 * in this case force B/G channel
2485 */
2486 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2487 !(is_channel_ibss(ch_info)))
2488 ch_info = &priv->channel_info[0];
2489
2490 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2491 if (is_channel_a_band(ch_info))
2492 priv->phymode = MODE_IEEE80211A;
2493 else
2494 priv->phymode = MODE_IEEE80211G;
2495
2496 iwl_set_flags_for_phymode(priv, priv->phymode);
2497
2498 priv->staging_rxon.ofdm_basic_rates =
2499 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2500 priv->staging_rxon.cck_basic_rates =
2501 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2502 }
2503
2504 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2505 {
2506 if (!iwl_is_ready_rf(priv))
2507 return -EAGAIN;
2508
2509 if (mode == IEEE80211_IF_TYPE_IBSS) {
2510 const struct iwl_channel_info *ch_info;
2511
2512 ch_info = iwl_get_channel_info(priv,
2513 priv->phymode,
2514 le16_to_cpu(priv->staging_rxon.channel));
2515
2516 if (!ch_info || !is_channel_ibss(ch_info)) {
2517 IWL_ERROR("channel %d not IBSS channel\n",
2518 le16_to_cpu(priv->staging_rxon.channel));
2519 return -EINVAL;
2520 }
2521 }
2522
2523 cancel_delayed_work(&priv->scan_check);
2524 if (iwl_scan_cancel_timeout(priv, 100)) {
2525 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2526 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2527 return -EAGAIN;
2528 }
2529
2530 priv->iw_mode = mode;
2531
2532 iwl_connection_init_rx_config(priv);
2533 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2534
2535 iwl_clear_stations_table(priv);
2536
2537 iwl_commit_rxon(priv);
2538
2539 return 0;
2540 }
2541
2542 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2543 struct ieee80211_tx_control *ctl,
2544 struct iwl_cmd *cmd,
2545 struct sk_buff *skb_frag,
2546 int last_frag)
2547 {
2548 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2549
2550 switch (keyinfo->alg) {
2551 case ALG_CCMP:
2552 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2553 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2554 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2555 break;
2556
2557 case ALG_TKIP:
2558 #if 0
2559 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2560
2561 if (last_frag)
2562 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2563 8);
2564 else
2565 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2566 #endif
2567 break;
2568
2569 case ALG_WEP:
2570 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2571 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2572
2573 if (keyinfo->keylen == 13)
2574 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2575
2576 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2577
2578 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2579 "with key %d\n", ctl->key_idx);
2580 break;
2581
2582 case ALG_NONE:
2583 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2584 break;
2585
2586 default:
2587 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2588 break;
2589 }
2590 }
2591
2592 /*
2593 * handle build REPLY_TX command notification.
2594 */
2595 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2596 struct iwl_cmd *cmd,
2597 struct ieee80211_tx_control *ctrl,
2598 struct ieee80211_hdr *hdr,
2599 int is_unicast, u8 std_id)
2600 {
2601 __le16 *qc;
2602 u16 fc = le16_to_cpu(hdr->frame_control);
2603 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2604
2605 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2606 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2607 tx_flags |= TX_CMD_FLG_ACK_MSK;
2608 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2609 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2610 if (ieee80211_is_probe_response(fc) &&
2611 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2612 tx_flags |= TX_CMD_FLG_TSF_MSK;
2613 } else {
2614 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2615 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2616 }
2617
2618 cmd->cmd.tx.sta_id = std_id;
2619 if (ieee80211_get_morefrag(hdr))
2620 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2621
2622 qc = ieee80211_get_qos_ctrl(hdr);
2623 if (qc) {
2624 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2625 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2626 } else
2627 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2628
2629 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2630 tx_flags |= TX_CMD_FLG_RTS_MSK;
2631 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2632 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2633 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2634 tx_flags |= TX_CMD_FLG_CTS_MSK;
2635 }
2636
2637 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2638 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2639
2640 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2641 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2642 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2643 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2644 cmd->cmd.tx.timeout.pm_frame_timeout =
2645 cpu_to_le16(3);
2646 else
2647 cmd->cmd.tx.timeout.pm_frame_timeout =
2648 cpu_to_le16(2);
2649 } else
2650 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2651
2652 cmd->cmd.tx.driver_txop = 0;
2653 cmd->cmd.tx.tx_flags = tx_flags;
2654 cmd->cmd.tx.next_frame_len = 0;
2655 }
2656
2657 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2658 {
2659 int sta_id;
2660 u16 fc = le16_to_cpu(hdr->frame_control);
2661
2662 /* If this frame is broadcast or not data then use the broadcast
2663 * station id */
2664 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2665 is_multicast_ether_addr(hdr->addr1))
2666 return priv->hw_setting.bcast_sta_id;
2667
2668 switch (priv->iw_mode) {
2669
2670 /* If this frame is part of a BSS network (we're a station), then
2671 * we use the AP's station id */
2672 case IEEE80211_IF_TYPE_STA:
2673 return IWL_AP_ID;
2674
2675 /* If we are an AP, then find the station, or use BCAST */
2676 case IEEE80211_IF_TYPE_AP:
2677 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2678 if (sta_id != IWL_INVALID_STATION)
2679 return sta_id;
2680 return priv->hw_setting.bcast_sta_id;
2681
2682 /* If this frame is part of a IBSS network, then we use the
2683 * target specific station id */
2684 case IEEE80211_IF_TYPE_IBSS: {
2685 DECLARE_MAC_BUF(mac);
2686
2687 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2688 if (sta_id != IWL_INVALID_STATION)
2689 return sta_id;
2690
2691 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2692
2693 if (sta_id != IWL_INVALID_STATION)
2694 return sta_id;
2695
2696 IWL_DEBUG_DROP("Station %s not in station map. "
2697 "Defaulting to broadcast...\n",
2698 print_mac(mac, hdr->addr1));
2699 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2700 return priv->hw_setting.bcast_sta_id;
2701 }
2702 default:
2703 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2704 return priv->hw_setting.bcast_sta_id;
2705 }
2706 }
2707
2708 /*
2709 * start REPLY_TX command process
2710 */
2711 static int iwl_tx_skb(struct iwl_priv *priv,
2712 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2713 {
2714 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2715 struct iwl_tfd_frame *tfd;
2716 u32 *control_flags;
2717 int txq_id = ctl->queue;
2718 struct iwl_tx_queue *txq = NULL;
2719 struct iwl_queue *q = NULL;
2720 dma_addr_t phys_addr;
2721 dma_addr_t txcmd_phys;
2722 struct iwl_cmd *out_cmd = NULL;
2723 u16 len, idx, len_org;
2724 u8 id, hdr_len, unicast;
2725 u8 sta_id;
2726 u16 seq_number = 0;
2727 u16 fc;
2728 __le16 *qc;
2729 u8 wait_write_ptr = 0;
2730 unsigned long flags;
2731 int rc;
2732
2733 spin_lock_irqsave(&priv->lock, flags);
2734 if (iwl_is_rfkill(priv)) {
2735 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2736 goto drop_unlock;
2737 }
2738
2739 if (!priv->interface_id) {
2740 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2741 goto drop_unlock;
2742 }
2743
2744 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2745 IWL_ERROR("ERROR: No TX rate available.\n");
2746 goto drop_unlock;
2747 }
2748
2749 unicast = !is_multicast_ether_addr(hdr->addr1);
2750 id = 0;
2751
2752 fc = le16_to_cpu(hdr->frame_control);
2753
2754 #ifdef CONFIG_IWLWIFI_DEBUG
2755 if (ieee80211_is_auth(fc))
2756 IWL_DEBUG_TX("Sending AUTH frame\n");
2757 else if (ieee80211_is_assoc_request(fc))
2758 IWL_DEBUG_TX("Sending ASSOC frame\n");
2759 else if (ieee80211_is_reassoc_request(fc))
2760 IWL_DEBUG_TX("Sending REASSOC frame\n");
2761 #endif
2762
2763 if (!iwl_is_associated(priv) &&
2764 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2765 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2766 goto drop_unlock;
2767 }
2768
2769 spin_unlock_irqrestore(&priv->lock, flags);
2770
2771 hdr_len = ieee80211_get_hdrlen(fc);
2772 sta_id = iwl_get_sta_id(priv, hdr);
2773 if (sta_id == IWL_INVALID_STATION) {
2774 DECLARE_MAC_BUF(mac);
2775
2776 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2777 print_mac(mac, hdr->addr1));
2778 goto drop;
2779 }
2780
2781 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2782
2783 qc = ieee80211_get_qos_ctrl(hdr);
2784 if (qc) {
2785 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2786 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2787 IEEE80211_SCTL_SEQ;
2788 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2789 (hdr->seq_ctrl &
2790 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2791 seq_number += 0x10;
2792 }
2793 txq = &priv->txq[txq_id];
2794 q = &txq->q;
2795
2796 spin_lock_irqsave(&priv->lock, flags);
2797
2798 tfd = &txq->bd[q->first_empty];
2799 memset(tfd, 0, sizeof(*tfd));
2800 control_flags = (u32 *) tfd;
2801 idx = get_cmd_index(q, q->first_empty, 0);
2802
2803 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2804 txq->txb[q->first_empty].skb[0] = skb;
2805 memcpy(&(txq->txb[q->first_empty].status.control),
2806 ctl, sizeof(struct ieee80211_tx_control));
2807 out_cmd = &txq->cmd[idx];
2808 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2809 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2810 out_cmd->hdr.cmd = REPLY_TX;
2811 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2812 INDEX_TO_SEQ(q->first_empty)));
2813 /* copy frags header */
2814 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2815
2816 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2817 len = priv->hw_setting.tx_cmd_len +
2818 sizeof(struct iwl_cmd_header) + hdr_len;
2819
2820 len_org = len;
2821 len = (len + 3) & ~3;
2822
2823 if (len_org != len)
2824 len_org = 1;
2825 else
2826 len_org = 0;
2827
2828 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2829 offsetof(struct iwl_cmd, hdr);
2830
2831 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2832
2833 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2834 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2835
2836 /* 802.11 null functions have no payload... */
2837 len = skb->len - hdr_len;
2838 if (len) {
2839 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2840 len, PCI_DMA_TODEVICE);
2841 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2842 }
2843
2844 /* If there is no payload, then only one TFD is used */
2845 if (!len)
2846 *control_flags = TFD_CTL_COUNT_SET(1);
2847 else
2848 *control_flags = TFD_CTL_COUNT_SET(2) |
2849 TFD_CTL_PAD_SET(U32_PAD(len));
2850
2851 len = (u16)skb->len;
2852 out_cmd->cmd.tx.len = cpu_to_le16(len);
2853
2854 /* TODO need this for burst mode later on */
2855 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2856
2857 /* set is_hcca to 0; it probably will never be implemented */
2858 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2859
2860 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2861 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2862
2863 if (!ieee80211_get_morefrag(hdr)) {
2864 txq->need_update = 1;
2865 if (qc) {
2866 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2867 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2868 }
2869 } else {
2870 wait_write_ptr = 1;
2871 txq->need_update = 0;
2872 }
2873
2874 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2875 sizeof(out_cmd->cmd.tx));
2876
2877 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2878 ieee80211_get_hdrlen(fc));
2879
2880 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2881 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2882 spin_unlock_irqrestore(&priv->lock, flags);
2883
2884 if (rc)
2885 return rc;
2886
2887 if ((iwl_queue_space(q) < q->high_mark)
2888 && priv->mac80211_registered) {
2889 if (wait_write_ptr) {
2890 spin_lock_irqsave(&priv->lock, flags);
2891 txq->need_update = 1;
2892 iwl_tx_queue_update_write_ptr(priv, txq);
2893 spin_unlock_irqrestore(&priv->lock, flags);
2894 }
2895
2896 ieee80211_stop_queue(priv->hw, ctl->queue);
2897 }
2898
2899 return 0;
2900
2901 drop_unlock:
2902 spin_unlock_irqrestore(&priv->lock, flags);
2903 drop:
2904 return -1;
2905 }
2906
2907 static void iwl_set_rate(struct iwl_priv *priv)
2908 {
2909 const struct ieee80211_hw_mode *hw = NULL;
2910 struct ieee80211_rate *rate;
2911 int i;
2912
2913 hw = iwl_get_hw_mode(priv, priv->phymode);
2914
2915 priv->active_rate = 0;
2916 priv->active_rate_basic = 0;
2917
2918 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2919 hw->mode == MODE_IEEE80211A ?
2920 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2921
2922 for (i = 0; i < hw->num_rates; i++) {
2923 rate = &(hw->rates[i]);
2924 if ((rate->val < IWL_RATE_COUNT) &&
2925 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2926 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2927 rate->val, iwl_rates[rate->val].plcp,
2928 (rate->flags & IEEE80211_RATE_BASIC) ?
2929 "*" : "");
2930 priv->active_rate |= (1 << rate->val);
2931 if (rate->flags & IEEE80211_RATE_BASIC)
2932 priv->active_rate_basic |= (1 << rate->val);
2933 } else
2934 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2935 rate->val, iwl_rates[rate->val].plcp);
2936 }
2937
2938 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2939 priv->active_rate, priv->active_rate_basic);
2940
2941 /*
2942 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2943 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2944 * OFDM
2945 */
2946 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2947 priv->staging_rxon.cck_basic_rates =
2948 ((priv->active_rate_basic &
2949 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2950 else
2951 priv->staging_rxon.cck_basic_rates =
2952 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2953
2954 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2955 priv->staging_rxon.ofdm_basic_rates =
2956 ((priv->active_rate_basic &
2957 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2958 IWL_FIRST_OFDM_RATE) & 0xFF;
2959 else
2960 priv->staging_rxon.ofdm_basic_rates =
2961 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2962 }
2963
2964 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2965 {
2966 unsigned long flags;
2967
2968 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2969 return;
2970
2971 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2972 disable_radio ? "OFF" : "ON");
2973
2974 if (disable_radio) {
2975 iwl_scan_cancel(priv);
2976 /* FIXME: This is a workaround for AP */
2977 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2978 spin_lock_irqsave(&priv->lock, flags);
2979 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2980 CSR_UCODE_SW_BIT_RFKILL);
2981 spin_unlock_irqrestore(&priv->lock, flags);
2982 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2983 set_bit(STATUS_RF_KILL_SW, &priv->status);
2984 }
2985 return;
2986 }
2987
2988 spin_lock_irqsave(&priv->lock, flags);
2989 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2990
2991 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2992 spin_unlock_irqrestore(&priv->lock, flags);
2993
2994 /* wake up ucode */
2995 msleep(10);
2996
2997 spin_lock_irqsave(&priv->lock, flags);
2998 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2999 if (!iwl_grab_restricted_access(priv))
3000 iwl_release_restricted_access(priv);
3001 spin_unlock_irqrestore(&priv->lock, flags);
3002
3003 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3004 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3005 "disabled by HW switch\n");
3006 return;
3007 }
3008
3009 queue_work(priv->workqueue, &priv->restart);
3010 return;
3011 }
3012
3013 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3014 u32 decrypt_res, struct ieee80211_rx_status *stats)
3015 {
3016 u16 fc =
3017 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3018
3019 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3020 return;
3021
3022 if (!(fc & IEEE80211_FCTL_PROTECTED))
3023 return;
3024
3025 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3026 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3027 case RX_RES_STATUS_SEC_TYPE_TKIP:
3028 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3029 RX_RES_STATUS_BAD_ICV_MIC)
3030 stats->flag |= RX_FLAG_MMIC_ERROR;
3031 case RX_RES_STATUS_SEC_TYPE_WEP:
3032 case RX_RES_STATUS_SEC_TYPE_CCMP:
3033 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3034 RX_RES_STATUS_DECRYPT_OK) {
3035 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3036 stats->flag |= RX_FLAG_DECRYPTED;
3037 }
3038 break;
3039
3040 default:
3041 break;
3042 }
3043 }
3044
3045 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3046 struct iwl_rx_mem_buffer *rxb,
3047 void *data, short len,
3048 struct ieee80211_rx_status *stats,
3049 u16 phy_flags)
3050 {
3051 struct iwl_rt_rx_hdr *iwl_rt;
3052
3053 /* First cache any information we need before we overwrite
3054 * the information provided in the skb from the hardware */
3055 s8 signal = stats->ssi;
3056 s8 noise = 0;
3057 int rate = stats->rate;
3058 u64 tsf = stats->mactime;
3059 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3060
3061 /* We received data from the HW, so stop the watchdog */
3062 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3063 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3064 return;
3065 }
3066
3067 /* copy the frame data to write after where the radiotap header goes */
3068 iwl_rt = (void *)rxb->skb->data;
3069 memmove(iwl_rt->payload, data, len);
3070
3071 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3072 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3073
3074 /* total header + data */
3075 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3076
3077 /* Set the size of the skb to the size of the frame */
3078 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3079
3080 /* Big bitfield of all the fields we provide in radiotap */
3081 iwl_rt->rt_hdr.it_present =
3082 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3083 (1 << IEEE80211_RADIOTAP_FLAGS) |
3084 (1 << IEEE80211_RADIOTAP_RATE) |
3085 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3086 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3087 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3088 (1 << IEEE80211_RADIOTAP_ANTENNA));
3089
3090 /* Zero the flags, we'll add to them as we go */
3091 iwl_rt->rt_flags = 0;
3092
3093 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3094
3095 /* Convert to dBm */
3096 iwl_rt->rt_dbmsignal = signal;
3097 iwl_rt->rt_dbmnoise = noise;
3098
3099 /* Convert the channel frequency and set the flags */
3100 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3101 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3102 iwl_rt->rt_chbitmask =
3103 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3104 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3105 iwl_rt->rt_chbitmask =
3106 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3107 else /* 802.11g */
3108 iwl_rt->rt_chbitmask =
3109 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3110
3111 rate = iwl_rate_index_from_plcp(rate);
3112 if (rate == -1)
3113 iwl_rt->rt_rate = 0;
3114 else
3115 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3116
3117 /* antenna number */
3118 iwl_rt->rt_antenna =
3119 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3120
3121 /* set the preamble flag if we have it */
3122 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3123 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3124
3125 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3126
3127 stats->flag |= RX_FLAG_RADIOTAP;
3128 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3129 rxb->skb = NULL;
3130 }
3131
3132
3133 #define IWL_PACKET_RETRY_TIME HZ
3134
3135 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3136 {
3137 u16 sc = le16_to_cpu(header->seq_ctrl);
3138 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3139 u16 frag = sc & IEEE80211_SCTL_FRAG;
3140 u16 *last_seq, *last_frag;
3141 unsigned long *last_time;
3142
3143 switch (priv->iw_mode) {
3144 case IEEE80211_IF_TYPE_IBSS:{
3145 struct list_head *p;
3146 struct iwl_ibss_seq *entry = NULL;
3147 u8 *mac = header->addr2;
3148 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3149
3150 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3151 entry =
3152 list_entry(p, struct iwl_ibss_seq, list);
3153 if (!compare_ether_addr(entry->mac, mac))
3154 break;
3155 }
3156 if (p == &priv->ibss_mac_hash[index]) {
3157 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3158 if (!entry) {
3159 IWL_ERROR
3160 ("Cannot malloc new mac entry\n");
3161 return 0;
3162 }
3163 memcpy(entry->mac, mac, ETH_ALEN);
3164 entry->seq_num = seq;
3165 entry->frag_num = frag;
3166 entry->packet_time = jiffies;
3167 list_add(&entry->list,
3168 &priv->ibss_mac_hash[index]);
3169 return 0;
3170 }
3171 last_seq = &entry->seq_num;
3172 last_frag = &entry->frag_num;
3173 last_time = &entry->packet_time;
3174 break;
3175 }
3176 case IEEE80211_IF_TYPE_STA:
3177 last_seq = &priv->last_seq_num;
3178 last_frag = &priv->last_frag_num;
3179 last_time = &priv->last_packet_time;
3180 break;
3181 default:
3182 return 0;
3183 }
3184 if ((*last_seq == seq) &&
3185 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3186 if (*last_frag == frag)
3187 goto drop;
3188 if (*last_frag + 1 != frag)
3189 /* out-of-order fragment */
3190 goto drop;
3191 } else
3192 *last_seq = seq;
3193
3194 *last_frag = frag;
3195 *last_time = jiffies;
3196 return 0;
3197
3198 drop:
3199 return 1;
3200 }
3201
3202 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3203
3204 #include "iwl-spectrum.h"
3205
3206 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3207 #define BEACON_TIME_MASK_HIGH 0xFF000000
3208 #define TIME_UNIT 1024
3209
3210 /*
3211 * extended beacon time format
3212 * time in usec will be changed into a 32-bit value in 8:24 format
3213 * the high 1 byte is the beacon counts
3214 * the lower 3 bytes is the time in usec within one beacon interval
3215 */
3216
3217 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3218 {
3219 u32 quot;
3220 u32 rem;
3221 u32 interval = beacon_interval * 1024;
3222
3223 if (!interval || !usec)
3224 return 0;
3225
3226 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3227 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3228
3229 return (quot << 24) + rem;
3230 }
3231
3232 /* base is usually what we get from ucode with each received frame,
3233 * the same as HW timer counter counting down
3234 */
3235
3236 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3237 {
3238 u32 base_low = base & BEACON_TIME_MASK_LOW;
3239 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3240 u32 interval = beacon_interval * TIME_UNIT;
3241 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3242 (addon & BEACON_TIME_MASK_HIGH);
3243
3244 if (base_low > addon_low)
3245 res += base_low - addon_low;
3246 else if (base_low < addon_low) {
3247 res += interval + base_low - addon_low;
3248 res += (1 << 24);
3249 } else
3250 res += (1 << 24);
3251
3252 return cpu_to_le32(res);
3253 }
3254
3255 static int iwl_get_measurement(struct iwl_priv *priv,
3256 struct ieee80211_measurement_params *params,
3257 u8 type)
3258 {
3259 struct iwl_spectrum_cmd spectrum;
3260 struct iwl_rx_packet *res;
3261 struct iwl_host_cmd cmd = {
3262 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3263 .data = (void *)&spectrum,
3264 .meta.flags = CMD_WANT_SKB,
3265 };
3266 u32 add_time = le64_to_cpu(params->start_time);
3267 int rc;
3268 int spectrum_resp_status;
3269 int duration = le16_to_cpu(params->duration);
3270
3271 if (iwl_is_associated(priv))
3272 add_time =
3273 iwl_usecs_to_beacons(
3274 le64_to_cpu(params->start_time) - priv->last_tsf,
3275 le16_to_cpu(priv->rxon_timing.beacon_interval));
3276
3277 memset(&spectrum, 0, sizeof(spectrum));
3278
3279 spectrum.channel_count = cpu_to_le16(1);
3280 spectrum.flags =
3281 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3282 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3283 cmd.len = sizeof(spectrum);
3284 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3285
3286 if (iwl_is_associated(priv))
3287 spectrum.start_time =
3288 iwl_add_beacon_time(priv->last_beacon_time,
3289 add_time,
3290 le16_to_cpu(priv->rxon_timing.beacon_interval));
3291 else
3292 spectrum.start_time = 0;
3293
3294 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3295 spectrum.channels[0].channel = params->channel;
3296 spectrum.channels[0].type = type;
3297 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3298 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3299 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3300
3301 rc = iwl_send_cmd_sync(priv, &cmd);
3302 if (rc)
3303 return rc;
3304
3305 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3306 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3307 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3308 rc = -EIO;
3309 }
3310
3311 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3312 switch (spectrum_resp_status) {
3313 case 0: /* Command will be handled */
3314 if (res->u.spectrum.id != 0xff) {
3315 IWL_DEBUG_INFO
3316 ("Replaced existing measurement: %d\n",
3317 res->u.spectrum.id);
3318 priv->measurement_status &= ~MEASUREMENT_READY;
3319 }
3320 priv->measurement_status |= MEASUREMENT_ACTIVE;
3321 rc = 0;
3322 break;
3323
3324 case 1: /* Command will not be handled */
3325 rc = -EAGAIN;
3326 break;
3327 }
3328
3329 dev_kfree_skb_any(cmd.meta.u.skb);
3330
3331 return rc;
3332 }
3333 #endif
3334
3335 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3336 struct iwl_tx_info *tx_sta)
3337 {
3338
3339 tx_sta->status.ack_signal = 0;
3340 tx_sta->status.excessive_retries = 0;
3341 tx_sta->status.queue_length = 0;
3342 tx_sta->status.queue_number = 0;
3343
3344 if (in_interrupt())
3345 ieee80211_tx_status_irqsafe(priv->hw,
3346 tx_sta->skb[0], &(tx_sta->status));
3347 else
3348 ieee80211_tx_status(priv->hw,
3349 tx_sta->skb[0], &(tx_sta->status));
3350
3351 tx_sta->skb[0] = NULL;
3352 }
3353
3354 /**
3355 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3356 *
3357 * When FW advances 'R' index, all entries between old and
3358 * new 'R' index need to be reclaimed. As result, some free space
3359 * forms. If there is enough free space (> low mark), wake Tx queue.
3360 */
3361 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3362 {
3363 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3364 struct iwl_queue *q = &txq->q;
3365 int nfreed = 0;
3366
3367 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3368 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3369 "is out of range [0-%d] %d %d.\n", txq_id,
3370 index, q->n_bd, q->first_empty, q->last_used);
3371 return 0;
3372 }
3373
3374 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3375 q->last_used != index;
3376 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3377 if (txq_id != IWL_CMD_QUEUE_NUM) {
3378 iwl_txstatus_to_ieee(priv,
3379 &(txq->txb[txq->q.last_used]));
3380 iwl_hw_txq_free_tfd(priv, txq);
3381 } else if (nfreed > 1) {
3382 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3383 q->first_empty, q->last_used);
3384 queue_work(priv->workqueue, &priv->restart);
3385 }
3386 nfreed++;
3387 }
3388
3389 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3390 (txq_id != IWL_CMD_QUEUE_NUM) &&
3391 priv->mac80211_registered)
3392 ieee80211_wake_queue(priv->hw, txq_id);
3393
3394
3395 return nfreed;
3396 }
3397
3398 static int iwl_is_tx_success(u32 status)
3399 {
3400 return (status & 0xFF) == 0x1;
3401 }
3402
3403 /******************************************************************************
3404 *
3405 * Generic RX handler implementations
3406 *
3407 ******************************************************************************/
3408 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3409 struct iwl_rx_mem_buffer *rxb)
3410 {
3411 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3412 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3413 int txq_id = SEQ_TO_QUEUE(sequence);
3414 int index = SEQ_TO_INDEX(sequence);
3415 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3416 struct ieee80211_tx_status *tx_status;
3417 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3418 u32 status = le32_to_cpu(tx_resp->status);
3419
3420 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3421 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3422 "is out of range [0-%d] %d %d\n", txq_id,
3423 index, txq->q.n_bd, txq->q.first_empty,
3424 txq->q.last_used);
3425 return;
3426 }
3427
3428 tx_status = &(txq->txb[txq->q.last_used].status);
3429
3430 tx_status->retry_count = tx_resp->failure_frame;
3431 tx_status->queue_number = status;
3432 tx_status->queue_length = tx_resp->bt_kill_count;
3433 tx_status->queue_length |= tx_resp->failure_rts;
3434
3435 tx_status->flags =
3436 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3437
3438 tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3439
3440 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3441 txq_id, iwl_get_tx_fail_reason(status), status,
3442 tx_resp->rate, tx_resp->failure_frame);
3443
3444 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3445 if (index != -1)
3446 iwl_tx_queue_reclaim(priv, txq_id, index);
3447
3448 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3449 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3450 }
3451
3452
3453 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3454 struct iwl_rx_mem_buffer *rxb)
3455 {
3456 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3457 struct iwl_alive_resp *palive;
3458 struct delayed_work *pwork;
3459
3460 palive = &pkt->u.alive_frame;
3461
3462 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3463 "0x%01X 0x%01X\n",
3464 palive->is_valid, palive->ver_type,
3465 palive->ver_subtype);
3466
3467 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3468 IWL_DEBUG_INFO("Initialization Alive received.\n");
3469 memcpy(&priv->card_alive_init,
3470 &pkt->u.alive_frame,
3471 sizeof(struct iwl_init_alive_resp));
3472 pwork = &priv->init_alive_start;
3473 } else {
3474 IWL_DEBUG_INFO("Runtime Alive received.\n");
3475 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3476 sizeof(struct iwl_alive_resp));
3477 pwork = &priv->alive_start;
3478 iwl_disable_events(priv);
3479 }
3480
3481 /* We delay the ALIVE response by 5ms to
3482 * give the HW RF Kill time to activate... */
3483 if (palive->is_valid == UCODE_VALID_OK)
3484 queue_delayed_work(priv->workqueue, pwork,
3485 msecs_to_jiffies(5));
3486 else
3487 IWL_WARNING("uCode did not respond OK.\n");
3488 }
3489
3490 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3491 struct iwl_rx_mem_buffer *rxb)
3492 {
3493 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3494
3495 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3496 return;
3497 }
3498
3499 static void iwl_rx_reply_error(struct iwl_priv *priv,
3500 struct iwl_rx_mem_buffer *rxb)
3501 {
3502 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3503
3504 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3505 "seq 0x%04X ser 0x%08X\n",
3506 le32_to_cpu(pkt->u.err_resp.error_type),
3507 get_cmd_string(pkt->u.err_resp.cmd_id),
3508 pkt->u.err_resp.cmd_id,
3509 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3510 le32_to_cpu(pkt->u.err_resp.error_info));
3511 }
3512
3513 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3514
3515 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3516 {
3517 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3518 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3519 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3520 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3521 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3522 rxon->channel = csa->channel;
3523 priv->staging_rxon.channel = csa->channel;
3524 }
3525
3526 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3527 struct iwl_rx_mem_buffer *rxb)
3528 {
3529 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3530 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3531 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3532
3533 if (!report->state) {
3534 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3535 "Spectrum Measure Notification: Start\n");
3536 return;
3537 }
3538
3539 memcpy(&priv->measure_report, report, sizeof(*report));
3540 priv->measurement_status |= MEASUREMENT_READY;
3541 #endif
3542 }
3543
3544 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3545 struct iwl_rx_mem_buffer *rxb)
3546 {
3547 #ifdef CONFIG_IWLWIFI_DEBUG
3548 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3549 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3550 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3551 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3552 #endif
3553 }
3554
3555 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3556 struct iwl_rx_mem_buffer *rxb)
3557 {
3558 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3559 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3560 "notification for %s:\n",
3561 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3562 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3563 }
3564
3565 static void iwl_bg_beacon_update(struct work_struct *work)
3566 {
3567 struct iwl_priv *priv =
3568 container_of(work, struct iwl_priv, beacon_update);
3569 struct sk_buff *beacon;
3570
3571 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3572 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3573
3574 if (!beacon) {
3575 IWL_ERROR("update beacon failed\n");
3576 return;
3577 }
3578
3579 mutex_lock(&priv->mutex);
3580 /* new beacon skb is allocated every time; dispose previous.*/
3581 if (priv->ibss_beacon)
3582 dev_kfree_skb(priv->ibss_beacon);
3583
3584 priv->ibss_beacon = beacon;
3585 mutex_unlock(&priv->mutex);
3586
3587 iwl_send_beacon_cmd(priv);
3588 }
3589
3590 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3591 struct iwl_rx_mem_buffer *rxb)
3592 {
3593 #ifdef CONFIG_IWLWIFI_DEBUG
3594 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3595 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3596 u8 rate = beacon->beacon_notify_hdr.rate;
3597
3598 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3599 "tsf %d %d rate %d\n",
3600 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3601 beacon->beacon_notify_hdr.failure_frame,
3602 le32_to_cpu(beacon->ibss_mgr_status),
3603 le32_to_cpu(beacon->high_tsf),
3604 le32_to_cpu(beacon->low_tsf), rate);
3605 #endif
3606
3607 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3608 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3609 queue_work(priv->workqueue, &priv->beacon_update);
3610 }
3611
3612 /* Service response to REPLY_SCAN_CMD (0x80) */
3613 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3614 struct iwl_rx_mem_buffer *rxb)
3615 {
3616 #ifdef CONFIG_IWLWIFI_DEBUG
3617 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3618 struct iwl_scanreq_notification *notif =
3619 (struct iwl_scanreq_notification *)pkt->u.raw;
3620
3621 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3622 #endif
3623 }
3624
3625 /* Service SCAN_START_NOTIFICATION (0x82) */
3626 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3627 struct iwl_rx_mem_buffer *rxb)
3628 {
3629 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3630 struct iwl_scanstart_notification *notif =
3631 (struct iwl_scanstart_notification *)pkt->u.raw;
3632 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3633 IWL_DEBUG_SCAN("Scan start: "
3634 "%d [802.11%s] "
3635 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3636 notif->channel,
3637 notif->band ? "bg" : "a",
3638 notif->tsf_high,
3639 notif->tsf_low, notif->status, notif->beacon_timer);
3640 }
3641
3642 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3643 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3644 struct iwl_rx_mem_buffer *rxb)
3645 {
3646 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3647 struct iwl_scanresults_notification *notif =
3648 (struct iwl_scanresults_notification *)pkt->u.raw;
3649
3650 IWL_DEBUG_SCAN("Scan ch.res: "
3651 "%d [802.11%s] "
3652 "(TSF: 0x%08X:%08X) - %d "
3653 "elapsed=%lu usec (%dms since last)\n",
3654 notif->channel,
3655 notif->band ? "bg" : "a",
3656 le32_to_cpu(notif->tsf_high),
3657 le32_to_cpu(notif->tsf_low),
3658 le32_to_cpu(notif->statistics[0]),
3659 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3660 jiffies_to_msecs(elapsed_jiffies
3661 (priv->last_scan_jiffies, jiffies)));
3662
3663 priv->last_scan_jiffies = jiffies;
3664 }
3665
3666 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3667 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3668 struct iwl_rx_mem_buffer *rxb)
3669 {
3670 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3671 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3672
3673 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3674 scan_notif->scanned_channels,
3675 scan_notif->tsf_low,
3676 scan_notif->tsf_high, scan_notif->status);
3677
3678 /* The HW is no longer scanning */
3679 clear_bit(STATUS_SCAN_HW, &priv->status);
3680
3681 /* The scan completion notification came in, so kill that timer... */
3682 cancel_delayed_work(&priv->scan_check);
3683
3684 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3685 (priv->scan_bands == 2) ? "2.4" : "5.2",
3686 jiffies_to_msecs(elapsed_jiffies
3687 (priv->scan_pass_start, jiffies)));
3688
3689 /* Remove this scanned band from the list
3690 * of pending bands to scan */
3691 priv->scan_bands--;
3692
3693 /* If a request to abort was given, or the scan did not succeed
3694 * then we reset the scan state machine and terminate,
3695 * re-queuing another scan if one has been requested */
3696 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3697 IWL_DEBUG_INFO("Aborted scan completed.\n");
3698 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3699 } else {
3700 /* If there are more bands on this scan pass reschedule */
3701 if (priv->scan_bands > 0)
3702 goto reschedule;
3703 }
3704
3705 priv->last_scan_jiffies = jiffies;
3706 IWL_DEBUG_INFO("Setting scan to off\n");
3707
3708 clear_bit(STATUS_SCANNING, &priv->status);
3709
3710 IWL_DEBUG_INFO("Scan took %dms\n",
3711 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3712
3713 queue_work(priv->workqueue, &priv->scan_completed);
3714
3715 return;
3716
3717 reschedule:
3718 priv->scan_pass_start = jiffies;
3719 queue_work(priv->workqueue, &priv->request_scan);
3720 }
3721
3722 /* Handle notification from uCode that card's power state is changing
3723 * due to software, hardware, or critical temperature RFKILL */
3724 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3725 struct iwl_rx_mem_buffer *rxb)
3726 {
3727 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3728 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3729 unsigned long status = priv->status;
3730
3731 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3732 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3733 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3734
3735 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3736 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3737
3738 if (flags & HW_CARD_DISABLED)
3739 set_bit(STATUS_RF_KILL_HW, &priv->status);
3740 else
3741 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3742
3743
3744 if (flags & SW_CARD_DISABLED)
3745 set_bit(STATUS_RF_KILL_SW, &priv->status);
3746 else
3747 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3748
3749 iwl_scan_cancel(priv);
3750
3751 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3752 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3753 (test_bit(STATUS_RF_KILL_SW, &status) !=
3754 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3755 queue_work(priv->workqueue, &priv->rf_kill);
3756 else
3757 wake_up_interruptible(&priv->wait_command_queue);
3758 }
3759
3760 /**
3761 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3762 *
3763 * Setup the RX handlers for each of the reply types sent from the uCode
3764 * to the host.
3765 *
3766 * This function chains into the hardware specific files for them to setup
3767 * any hardware specific handlers as well.
3768 */
3769 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3770 {
3771 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3772 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3773 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3774 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3775 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3776 iwl_rx_spectrum_measure_notif;
3777 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3778 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3779 iwl_rx_pm_debug_statistics_notif;
3780 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3781
3782 /* NOTE: iwl_rx_statistics is different based on whether
3783 * the build is for the 3945 or the 4965. See the
3784 * corresponding implementation in iwl-XXXX.c
3785 *
3786 * The same handler is used for both the REPLY to a
3787 * discrete statistics request from the host as well as
3788 * for the periodic statistics notification from the uCode
3789 */
3790 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3791 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3792
3793 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3794 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3795 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3796 iwl_rx_scan_results_notif;
3797 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3798 iwl_rx_scan_complete_notif;
3799 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3800 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3801
3802 /* Setup hardware specific Rx handlers */
3803 iwl_hw_rx_handler_setup(priv);
3804 }
3805
3806 /**
3807 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3808 * @rxb: Rx buffer to reclaim
3809 *
3810 * If an Rx buffer has an async callback associated with it the callback
3811 * will be executed. The attached skb (if present) will only be freed
3812 * if the callback returns 1
3813 */
3814 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3815 struct iwl_rx_mem_buffer *rxb)
3816 {
3817 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3818 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3819 int txq_id = SEQ_TO_QUEUE(sequence);
3820 int index = SEQ_TO_INDEX(sequence);
3821 int huge = sequence & SEQ_HUGE_FRAME;
3822 int cmd_index;
3823 struct iwl_cmd *cmd;
3824
3825 /* If a Tx command is being handled and it isn't in the actual
3826 * command queue then there a command routing bug has been introduced
3827 * in the queue management code. */
3828 if (txq_id != IWL_CMD_QUEUE_NUM)
3829 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3830 txq_id, pkt->hdr.cmd);
3831 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3832
3833 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3834 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3835
3836 /* Input error checking is done when commands are added to queue. */
3837 if (cmd->meta.flags & CMD_WANT_SKB) {
3838 cmd->meta.source->u.skb = rxb->skb;
3839 rxb->skb = NULL;
3840 } else if (cmd->meta.u.callback &&
3841 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3842 rxb->skb = NULL;
3843
3844 iwl_tx_queue_reclaim(priv, txq_id, index);
3845
3846 if (!(cmd->meta.flags & CMD_ASYNC)) {
3847 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3848 wake_up_interruptible(&priv->wait_command_queue);
3849 }
3850 }
3851
3852 /************************** RX-FUNCTIONS ****************************/
3853 /*
3854 * Rx theory of operation
3855 *
3856 * The host allocates 32 DMA target addresses and passes the host address
3857 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3858 * 0 to 31
3859 *
3860 * Rx Queue Indexes
3861 * The host/firmware share two index registers for managing the Rx buffers.
3862 *
3863 * The READ index maps to the first position that the firmware may be writing
3864 * to -- the driver can read up to (but not including) this position and get
3865 * good data.
3866 * The READ index is managed by the firmware once the card is enabled.
3867 *
3868 * The WRITE index maps to the last position the driver has read from -- the
3869 * position preceding WRITE is the last slot the firmware can place a packet.
3870 *
3871 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3872 * WRITE = READ.
3873 *
3874 * During initialization the host sets up the READ queue position to the first
3875 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3876 *
3877 * When the firmware places a packet in a buffer it will advance the READ index
3878 * and fire the RX interrupt. The driver can then query the READ index and
3879 * process as many packets as possible, moving the WRITE index forward as it
3880 * resets the Rx queue buffers with new memory.
3881 *
3882 * The management in the driver is as follows:
3883 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3884 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3885 * to replensish the iwl->rxq->rx_free.
3886 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3887 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3888 * 'processed' and 'read' driver indexes as well)
3889 * + A received packet is processed and handed to the kernel network stack,
3890 * detached from the iwl->rxq. The driver 'processed' index is updated.
3891 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3892 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3893 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3894 * were enough free buffers and RX_STALLED is set it is cleared.
3895 *
3896 *
3897 * Driver sequence:
3898 *
3899 * iwl_rx_queue_alloc() Allocates rx_free
3900 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
3901 * iwl_rx_queue_restock
3902 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
3903 * queue, updates firmware pointers, and updates
3904 * the WRITE index. If insufficient rx_free buffers
3905 * are available, schedules iwl_rx_replenish
3906 *
3907 * -- enable interrupts --
3908 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
3909 * READ INDEX, detaching the SKB from the pool.
3910 * Moves the packet buffer from queue to rx_used.
3911 * Calls iwl_rx_queue_restock to refill any empty
3912 * slots.
3913 * ...
3914 *
3915 */
3916
3917 /**
3918 * iwl_rx_queue_space - Return number of free slots available in queue.
3919 */
3920 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3921 {
3922 int s = q->read - q->write;
3923 if (s <= 0)
3924 s += RX_QUEUE_SIZE;
3925 /* keep some buffer to not confuse full and empty queue */
3926 s -= 2;
3927 if (s < 0)
3928 s = 0;
3929 return s;
3930 }
3931
3932 /**
3933 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3934 *
3935 * NOTE: This function has 3945 and 4965 specific code sections
3936 * but is declared in base due to the majority of the
3937 * implementation being the same (only a numeric constant is
3938 * different)
3939 *
3940 */
3941 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3942 {
3943 u32 reg = 0;
3944 int rc = 0;
3945 unsigned long flags;
3946
3947 spin_lock_irqsave(&q->lock, flags);
3948
3949 if (q->need_update == 0)
3950 goto exit_unlock;
3951
3952 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3953 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3954
3955 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3956 iwl_set_bit(priv, CSR_GP_CNTRL,
3957 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3958 goto exit_unlock;
3959 }
3960
3961 rc = iwl_grab_restricted_access(priv);
3962 if (rc)
3963 goto exit_unlock;
3964
3965 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3966 q->write & ~0x7);
3967 iwl_release_restricted_access(priv);
3968 } else
3969 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3970
3971
3972 q->need_update = 0;
3973
3974 exit_unlock:
3975 spin_unlock_irqrestore(&q->lock, flags);
3976 return rc;
3977 }
3978
3979 /**
3980 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3981 *
3982 * NOTE: This function has 3945 and 4965 specific code paths in it.
3983 */
3984 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3985 dma_addr_t dma_addr)
3986 {
3987 return cpu_to_le32((u32)dma_addr);
3988 }
3989
3990 /**
3991 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
3992 *
3993 * If there are slots in the RX queue that need to be restocked,
3994 * and we have free pre-allocated buffers, fill the ranks as much
3995 * as we can pulling from rx_free.
3996 *
3997 * This moves the 'write' index forward to catch up with 'processed', and
3998 * also updates the memory address in the firmware to reference the new
3999 * target buffer.
4000 */
4001 int iwl_rx_queue_restock(struct iwl_priv *priv)
4002 {
4003 struct iwl_rx_queue *rxq = &priv->rxq;
4004 struct list_head *element;
4005 struct iwl_rx_mem_buffer *rxb;
4006 unsigned long flags;
4007 int write, rc;
4008
4009 spin_lock_irqsave(&rxq->lock, flags);
4010 write = rxq->write & ~0x7;
4011 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4012 element = rxq->rx_free.next;
4013 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4014 list_del(element);
4015 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4016 rxq->queue[rxq->write] = rxb;
4017 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4018 rxq->free_count--;
4019 }
4020 spin_unlock_irqrestore(&rxq->lock, flags);
4021 /* If the pre-allocated buffer pool is dropping low, schedule to
4022 * refill it */
4023 if (rxq->free_count <= RX_LOW_WATERMARK)
4024 queue_work(priv->workqueue, &priv->rx_replenish);
4025
4026
4027 /* If we've added more space for the firmware to place data, tell it */
4028 if ((write != (rxq->write & ~0x7))
4029 || (abs(rxq->write - rxq->read) > 7)) {
4030 spin_lock_irqsave(&rxq->lock, flags);
4031 rxq->need_update = 1;
4032 spin_unlock_irqrestore(&rxq->lock, flags);
4033 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4034 if (rc)
4035 return rc;
4036 }
4037
4038 return 0;
4039 }
4040
4041 /**
4042 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4043 *
4044 * When moving to rx_free an SKB is allocated for the slot.
4045 *
4046 * Also restock the Rx queue via iwl_rx_queue_restock.
4047 * This is called as a scheduled work item (except for during intialization)
4048 */
4049 void iwl_rx_replenish(void *data)
4050 {
4051 struct iwl_priv *priv = data;
4052 struct iwl_rx_queue *rxq = &priv->rxq;
4053 struct list_head *element;
4054 struct iwl_rx_mem_buffer *rxb;
4055 unsigned long flags;
4056 spin_lock_irqsave(&rxq->lock, flags);
4057 while (!list_empty(&rxq->rx_used)) {
4058 element = rxq->rx_used.next;
4059 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4060 rxb->skb =
4061 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4062 if (!rxb->skb) {
4063 if (net_ratelimit())
4064 printk(KERN_CRIT DRV_NAME
4065 ": Can not allocate SKB buffers\n");
4066 /* We don't reschedule replenish work here -- we will
4067 * call the restock method and if it still needs
4068 * more buffers it will schedule replenish */
4069 break;
4070 }
4071 priv->alloc_rxb_skb++;
4072 list_del(element);
4073 rxb->dma_addr =
4074 pci_map_single(priv->pci_dev, rxb->skb->data,
4075 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4076 list_add_tail(&rxb->list, &rxq->rx_free);
4077 rxq->free_count++;
4078 }
4079 spin_unlock_irqrestore(&rxq->lock, flags);
4080
4081 spin_lock_irqsave(&priv->lock, flags);
4082 iwl_rx_queue_restock(priv);
4083 spin_unlock_irqrestore(&priv->lock, flags);
4084 }
4085
4086 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4087 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4088 * This free routine walks the list of POOL entries and if SKB is set to
4089 * non NULL it is unmapped and freed
4090 */
4091 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4092 {
4093 int i;
4094 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4095 if (rxq->pool[i].skb != NULL) {
4096 pci_unmap_single(priv->pci_dev,
4097 rxq->pool[i].dma_addr,
4098 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4099 dev_kfree_skb(rxq->pool[i].skb);
4100 }
4101 }
4102
4103 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4104 rxq->dma_addr);
4105 rxq->bd = NULL;
4106 }
4107
4108 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4109 {
4110 struct iwl_rx_queue *rxq = &priv->rxq;
4111 struct pci_dev *dev = priv->pci_dev;
4112 int i;
4113
4114 spin_lock_init(&rxq->lock);
4115 INIT_LIST_HEAD(&rxq->rx_free);
4116 INIT_LIST_HEAD(&rxq->rx_used);
4117 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4118 if (!rxq->bd)
4119 return -ENOMEM;
4120 /* Fill the rx_used queue with _all_ of the Rx buffers */
4121 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4122 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4123 /* Set us so that we have processed and used all buffers, but have
4124 * not restocked the Rx queue with fresh buffers */
4125 rxq->read = rxq->write = 0;
4126 rxq->free_count = 0;
4127 rxq->need_update = 0;
4128 return 0;
4129 }
4130
4131 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4132 {
4133 unsigned long flags;
4134 int i;
4135 spin_lock_irqsave(&rxq->lock, flags);
4136 INIT_LIST_HEAD(&rxq->rx_free);
4137 INIT_LIST_HEAD(&rxq->rx_used);
4138 /* Fill the rx_used queue with _all_ of the Rx buffers */
4139 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4140 /* In the reset function, these buffers may have been allocated
4141 * to an SKB, so we need to unmap and free potential storage */
4142 if (rxq->pool[i].skb != NULL) {
4143 pci_unmap_single(priv->pci_dev,
4144 rxq->pool[i].dma_addr,
4145 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4146 priv->alloc_rxb_skb--;
4147 dev_kfree_skb(rxq->pool[i].skb);
4148 rxq->pool[i].skb = NULL;
4149 }
4150 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4151 }
4152
4153 /* Set us so that we have processed and used all buffers, but have
4154 * not restocked the Rx queue with fresh buffers */
4155 rxq->read = rxq->write = 0;
4156 rxq->free_count = 0;
4157 spin_unlock_irqrestore(&rxq->lock, flags);
4158 }
4159
4160 /* Convert linear signal-to-noise ratio into dB */
4161 static u8 ratio2dB[100] = {
4162 /* 0 1 2 3 4 5 6 7 8 9 */
4163 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4164 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4165 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4166 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4167 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4168 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4169 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4170 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4171 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4172 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4173 };
4174
4175 /* Calculates a relative dB value from a ratio of linear
4176 * (i.e. not dB) signal levels.
4177 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4178 int iwl_calc_db_from_ratio(int sig_ratio)
4179 {
4180 /* Anything above 1000:1 just report as 60 dB */
4181 if (sig_ratio > 1000)
4182 return 60;
4183
4184 /* Above 100:1, divide by 10 and use table,
4185 * add 20 dB to make up for divide by 10 */
4186 if (sig_ratio > 100)
4187 return (20 + (int)ratio2dB[sig_ratio/10]);
4188
4189 /* We shouldn't see this */
4190 if (sig_ratio < 1)
4191 return 0;
4192
4193 /* Use table for ratios 1:1 - 99:1 */
4194 return (int)ratio2dB[sig_ratio];
4195 }
4196
4197 #define PERFECT_RSSI (-20) /* dBm */
4198 #define WORST_RSSI (-95) /* dBm */
4199 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4200
4201 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4202 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4203 * about formulas used below. */
4204 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4205 {
4206 int sig_qual;
4207 int degradation = PERFECT_RSSI - rssi_dbm;
4208
4209 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4210 * as indicator; formula is (signal dbm - noise dbm).
4211 * SNR at or above 40 is a great signal (100%).
4212 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4213 * Weakest usable signal is usually 10 - 15 dB SNR. */
4214 if (noise_dbm) {
4215 if (rssi_dbm - noise_dbm >= 40)
4216 return 100;
4217 else if (rssi_dbm < noise_dbm)
4218 return 0;
4219 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4220
4221 /* Else use just the signal level.
4222 * This formula is a least squares fit of data points collected and
4223 * compared with a reference system that had a percentage (%) display
4224 * for signal quality. */
4225 } else
4226 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4227 (15 * RSSI_RANGE + 62 * degradation)) /
4228 (RSSI_RANGE * RSSI_RANGE);
4229
4230 if (sig_qual > 100)
4231 sig_qual = 100;
4232 else if (sig_qual < 1)
4233 sig_qual = 0;
4234
4235 return sig_qual;
4236 }
4237
4238 /**
4239 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4240 *
4241 * Uses the priv->rx_handlers callback function array to invoke
4242 * the appropriate handlers, including command responses,
4243 * frame-received notifications, and other notifications.
4244 */
4245 static void iwl_rx_handle(struct iwl_priv *priv)
4246 {
4247 struct iwl_rx_mem_buffer *rxb;
4248 struct iwl_rx_packet *pkt;
4249 struct iwl_rx_queue *rxq = &priv->rxq;
4250 u32 r, i;
4251 int reclaim;
4252 unsigned long flags;
4253
4254 r = iwl_hw_get_rx_read(priv);
4255 i = rxq->read;
4256
4257 /* Rx interrupt, but nothing sent from uCode */
4258 if (i == r)
4259 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4260
4261 while (i != r) {
4262 rxb = rxq->queue[i];
4263
4264 /* If an RXB doesn't have a queue slot associated with it
4265 * then a bug has been introduced in the queue refilling
4266 * routines -- catch it here */
4267 BUG_ON(rxb == NULL);
4268
4269 rxq->queue[i] = NULL;
4270
4271 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4272 IWL_RX_BUF_SIZE,
4273 PCI_DMA_FROMDEVICE);
4274 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4275
4276 /* Reclaim a command buffer only if this packet is a response
4277 * to a (driver-originated) command.
4278 * If the packet (e.g. Rx frame) originated from uCode,
4279 * there is no command buffer to reclaim.
4280 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4281 * but apparently a few don't get set; catch them here. */
4282 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4283 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4284 (pkt->hdr.cmd != REPLY_TX);
4285
4286 /* Based on type of command response or notification,
4287 * handle those that need handling via function in
4288 * rx_handlers table. See iwl_setup_rx_handlers() */
4289 if (priv->rx_handlers[pkt->hdr.cmd]) {
4290 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4291 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4292 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4293 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4294 } else {
4295 /* No handling needed */
4296 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4297 "r %d i %d No handler needed for %s, 0x%02x\n",
4298 r, i, get_cmd_string(pkt->hdr.cmd),
4299 pkt->hdr.cmd);
4300 }
4301
4302 if (reclaim) {
4303 /* Invoke any callbacks, transfer the skb to caller,
4304 * and fire off the (possibly) blocking iwl_send_cmd()
4305 * as we reclaim the driver command queue */
4306 if (rxb && rxb->skb)
4307 iwl_tx_cmd_complete(priv, rxb);
4308 else
4309 IWL_WARNING("Claim null rxb?\n");
4310 }
4311
4312 /* For now we just don't re-use anything. We can tweak this
4313 * later to try and re-use notification packets and SKBs that
4314 * fail to Rx correctly */
4315 if (rxb->skb != NULL) {
4316 priv->alloc_rxb_skb--;
4317 dev_kfree_skb_any(rxb->skb);
4318 rxb->skb = NULL;
4319 }
4320
4321 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4322 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4323 spin_lock_irqsave(&rxq->lock, flags);
4324 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4325 spin_unlock_irqrestore(&rxq->lock, flags);
4326 i = (i + 1) & RX_QUEUE_MASK;
4327 }
4328
4329 /* Backtrack one entry */
4330 priv->rxq.read = i;
4331 iwl_rx_queue_restock(priv);
4332 }
4333
4334 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4335 struct iwl_tx_queue *txq)
4336 {
4337 u32 reg = 0;
4338 int rc = 0;
4339 int txq_id = txq->q.id;
4340
4341 if (txq->need_update == 0)
4342 return rc;
4343
4344 /* if we're trying to save power */
4345 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4346 /* wake up nic if it's powered down ...
4347 * uCode will wake up, and interrupt us again, so next
4348 * time we'll skip this part. */
4349 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4350
4351 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4352 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4353 iwl_set_bit(priv, CSR_GP_CNTRL,
4354 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4355 return rc;
4356 }
4357
4358 /* restore this queue's parameters in nic hardware. */
4359 rc = iwl_grab_restricted_access(priv);
4360 if (rc)
4361 return rc;
4362 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4363 txq->q.first_empty | (txq_id << 8));
4364 iwl_release_restricted_access(priv);
4365
4366 /* else not in power-save mode, uCode will never sleep when we're
4367 * trying to tx (during RFKILL, we're not trying to tx). */
4368 } else
4369 iwl_write32(priv, HBUS_TARG_WRPTR,
4370 txq->q.first_empty | (txq_id << 8));
4371
4372 txq->need_update = 0;
4373
4374 return rc;
4375 }
4376
4377 #ifdef CONFIG_IWLWIFI_DEBUG
4378 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4379 {
4380 DECLARE_MAC_BUF(mac);
4381
4382 IWL_DEBUG_RADIO("RX CONFIG:\n");
4383 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4384 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4385 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4386 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4387 le32_to_cpu(rxon->filter_flags));
4388 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4389 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4390 rxon->ofdm_basic_rates);
4391 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4392 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4393 print_mac(mac, rxon->node_addr));
4394 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4395 print_mac(mac, rxon->bssid_addr));
4396 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4397 }
4398 #endif
4399
4400 static void iwl_enable_interrupts(struct iwl_priv *priv)
4401 {
4402 IWL_DEBUG_ISR("Enabling interrupts\n");
4403 set_bit(STATUS_INT_ENABLED, &priv->status);
4404 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4405 }
4406
4407 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4408 {
4409 clear_bit(STATUS_INT_ENABLED, &priv->status);
4410
4411 /* disable interrupts from uCode/NIC to host */
4412 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4413
4414 /* acknowledge/clear/reset any interrupts still pending
4415 * from uCode or flow handler (Rx/Tx DMA) */
4416 iwl_write32(priv, CSR_INT, 0xffffffff);
4417 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4418 IWL_DEBUG_ISR("Disabled interrupts\n");
4419 }
4420
4421 static const char *desc_lookup(int i)
4422 {
4423 switch (i) {
4424 case 1:
4425 return "FAIL";
4426 case 2:
4427 return "BAD_PARAM";
4428 case 3:
4429 return "BAD_CHECKSUM";
4430 case 4:
4431 return "NMI_INTERRUPT";
4432 case 5:
4433 return "SYSASSERT";
4434 case 6:
4435 return "FATAL_ERROR";
4436 }
4437
4438 return "UNKNOWN";
4439 }
4440
4441 #define ERROR_START_OFFSET (1 * sizeof(u32))
4442 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4443
4444 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4445 {
4446 u32 i;
4447 u32 desc, time, count, base, data1;
4448 u32 blink1, blink2, ilink1, ilink2;
4449 int rc;
4450
4451 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4452
4453 if (!iwl_hw_valid_rtc_data_addr(base)) {
4454 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4455 return;
4456 }
4457
4458 rc = iwl_grab_restricted_access(priv);
4459 if (rc) {
4460 IWL_WARNING("Can not read from adapter at this time.\n");
4461 return;
4462 }
4463
4464 count = iwl_read_restricted_mem(priv, base);
4465
4466 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4467 IWL_ERROR("Start IWL Error Log Dump:\n");
4468 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4469 priv->status, priv->config, count);
4470 }
4471
4472 IWL_ERROR("Desc Time asrtPC blink2 "
4473 "ilink1 nmiPC Line\n");
4474 for (i = ERROR_START_OFFSET;
4475 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4476 i += ERROR_ELEM_SIZE) {
4477 desc = iwl_read_restricted_mem(priv, base + i);
4478 time =
4479 iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4480 blink1 =
4481 iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4482 blink2 =
4483 iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4484 ilink1 =
4485 iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4486 ilink2 =
4487 iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4488 data1 =
4489 iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4490
4491 IWL_ERROR
4492 ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4493 desc_lookup(desc), desc, time, blink1, blink2,
4494 ilink1, ilink2, data1);
4495 }
4496
4497 iwl_release_restricted_access(priv);
4498
4499 }
4500
4501 #define EVENT_START_OFFSET (4 * sizeof(u32))
4502
4503 /**
4504 * iwl_print_event_log - Dump error event log to syslog
4505 *
4506 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4507 */
4508 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4509 u32 num_events, u32 mode)
4510 {
4511 u32 i;
4512 u32 base; /* SRAM byte address of event log header */
4513 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4514 u32 ptr; /* SRAM byte address of log data */
4515 u32 ev, time, data; /* event log data */
4516
4517 if (num_events == 0)
4518 return;
4519
4520 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4521
4522 if (mode == 0)
4523 event_size = 2 * sizeof(u32);
4524 else
4525 event_size = 3 * sizeof(u32);
4526
4527 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4528
4529 /* "time" is actually "data" for mode 0 (no timestamp).
4530 * place event id # at far right for easier visual parsing. */
4531 for (i = 0; i < num_events; i++) {
4532 ev = iwl_read_restricted_mem(priv, ptr);
4533 ptr += sizeof(u32);
4534 time = iwl_read_restricted_mem(priv, ptr);
4535 ptr += sizeof(u32);
4536 if (mode == 0)
4537 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4538 else {
4539 data = iwl_read_restricted_mem(priv, ptr);
4540 ptr += sizeof(u32);
4541 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4542 }
4543 }
4544 }
4545
4546 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4547 {
4548 int rc;
4549 u32 base; /* SRAM byte address of event log header */
4550 u32 capacity; /* event log capacity in # entries */
4551 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4552 u32 num_wraps; /* # times uCode wrapped to top of log */
4553 u32 next_entry; /* index of next entry to be written by uCode */
4554 u32 size; /* # entries that we'll print */
4555
4556 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4557 if (!iwl_hw_valid_rtc_data_addr(base)) {
4558 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4559 return;
4560 }
4561
4562 rc = iwl_grab_restricted_access(priv);
4563 if (rc) {
4564 IWL_WARNING("Can not read from adapter at this time.\n");
4565 return;
4566 }
4567
4568 /* event log header */
4569 capacity = iwl_read_restricted_mem(priv, base);
4570 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4571 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4572 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4573
4574 size = num_wraps ? capacity : next_entry;
4575
4576 /* bail out if nothing in log */
4577 if (size == 0) {
4578 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4579 iwl_release_restricted_access(priv);
4580 return;
4581 }
4582
4583 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4584 size, num_wraps);
4585
4586 /* if uCode has wrapped back to top of log, start at the oldest entry,
4587 * i.e the next one that uCode would fill. */
4588 if (num_wraps)
4589 iwl_print_event_log(priv, next_entry,
4590 capacity - next_entry, mode);
4591
4592 /* (then/else) start at top of log */
4593 iwl_print_event_log(priv, 0, next_entry, mode);
4594
4595 iwl_release_restricted_access(priv);
4596 }
4597
4598 /**
4599 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4600 */
4601 static void iwl_irq_handle_error(struct iwl_priv *priv)
4602 {
4603 /* Set the FW error flag -- cleared on iwl_down */
4604 set_bit(STATUS_FW_ERROR, &priv->status);
4605
4606 /* Cancel currently queued command. */
4607 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4608
4609 #ifdef CONFIG_IWLWIFI_DEBUG
4610 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4611 iwl_dump_nic_error_log(priv);
4612 iwl_dump_nic_event_log(priv);
4613 iwl_print_rx_config_cmd(&priv->staging_rxon);
4614 }
4615 #endif
4616
4617 wake_up_interruptible(&priv->wait_command_queue);
4618
4619 /* Keep the restart process from trying to send host
4620 * commands by clearing the INIT status bit */
4621 clear_bit(STATUS_READY, &priv->status);
4622
4623 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4624 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4625 "Restarting adapter due to uCode error.\n");
4626
4627 if (iwl_is_associated(priv)) {
4628 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4629 sizeof(priv->recovery_rxon));
4630 priv->error_recovering = 1;
4631 }
4632 queue_work(priv->workqueue, &priv->restart);
4633 }
4634 }
4635
4636 static void iwl_error_recovery(struct iwl_priv *priv)
4637 {
4638 unsigned long flags;
4639
4640 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4641 sizeof(priv->staging_rxon));
4642 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4643 iwl_commit_rxon(priv);
4644
4645 iwl_add_station(priv, priv->bssid, 1, 0);
4646
4647 spin_lock_irqsave(&priv->lock, flags);
4648 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4649 priv->error_recovering = 0;
4650 spin_unlock_irqrestore(&priv->lock, flags);
4651 }
4652
4653 static void iwl_irq_tasklet(struct iwl_priv *priv)
4654 {
4655 u32 inta, handled = 0;
4656 u32 inta_fh;
4657 unsigned long flags;
4658 #ifdef CONFIG_IWLWIFI_DEBUG
4659 u32 inta_mask;
4660 #endif
4661
4662 spin_lock_irqsave(&priv->lock, flags);
4663
4664 /* Ack/clear/reset pending uCode interrupts.
4665 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4666 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4667 inta = iwl_read32(priv, CSR_INT);
4668 iwl_write32(priv, CSR_INT, inta);
4669
4670 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4671 * Any new interrupts that happen after this, either while we're
4672 * in this tasklet, or later, will show up in next ISR/tasklet. */
4673 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4674 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4675
4676 #ifdef CONFIG_IWLWIFI_DEBUG
4677 if (iwl_debug_level & IWL_DL_ISR) {
4678 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4679 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4680 inta, inta_mask, inta_fh);
4681 }
4682 #endif
4683
4684 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4685 * atomic, make sure that inta covers all the interrupts that
4686 * we've discovered, even if FH interrupt came in just after
4687 * reading CSR_INT. */
4688 if (inta_fh & CSR_FH_INT_RX_MASK)
4689 inta |= CSR_INT_BIT_FH_RX;
4690 if (inta_fh & CSR_FH_INT_TX_MASK)
4691 inta |= CSR_INT_BIT_FH_TX;
4692
4693 /* Now service all interrupt bits discovered above. */
4694 if (inta & CSR_INT_BIT_HW_ERR) {
4695 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4696
4697 /* Tell the device to stop sending interrupts */
4698 iwl_disable_interrupts(priv);
4699
4700 iwl_irq_handle_error(priv);
4701
4702 handled |= CSR_INT_BIT_HW_ERR;
4703
4704 spin_unlock_irqrestore(&priv->lock, flags);
4705
4706 return;
4707 }
4708
4709 #ifdef CONFIG_IWLWIFI_DEBUG
4710 if (iwl_debug_level & (IWL_DL_ISR)) {
4711 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4712 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4713 IWL_DEBUG_ISR("Microcode started or stopped.\n");
4714
4715 /* Alive notification via Rx interrupt will do the real work */
4716 if (inta & CSR_INT_BIT_ALIVE)
4717 IWL_DEBUG_ISR("Alive interrupt\n");
4718 }
4719 #endif
4720 /* Safely ignore these bits for debug checks below */
4721 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4722
4723 /* HW RF KILL switch toggled (4965 only) */
4724 if (inta & CSR_INT_BIT_RF_KILL) {
4725 int hw_rf_kill = 0;
4726 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4727 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4728 hw_rf_kill = 1;
4729
4730 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4731 "RF_KILL bit toggled to %s.\n",
4732 hw_rf_kill ? "disable radio":"enable radio");
4733
4734 /* Queue restart only if RF_KILL switch was set to "kill"
4735 * when we loaded driver, and is now set to "enable".
4736 * After we're Alive, RF_KILL gets handled by
4737 * iwl_rx_card_state_notif() */
4738 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4739 queue_work(priv->workqueue, &priv->restart);
4740
4741 handled |= CSR_INT_BIT_RF_KILL;
4742 }
4743
4744 /* Chip got too hot and stopped itself (4965 only) */
4745 if (inta & CSR_INT_BIT_CT_KILL) {
4746 IWL_ERROR("Microcode CT kill error detected.\n");
4747 handled |= CSR_INT_BIT_CT_KILL;
4748 }
4749
4750 /* Error detected by uCode */
4751 if (inta & CSR_INT_BIT_SW_ERR) {
4752 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4753 inta);
4754 iwl_irq_handle_error(priv);
4755 handled |= CSR_INT_BIT_SW_ERR;
4756 }
4757
4758 /* uCode wakes up after power-down sleep */
4759 if (inta & CSR_INT_BIT_WAKEUP) {
4760 IWL_DEBUG_ISR("Wakeup interrupt\n");
4761 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4762 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4763 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4764 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4765 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4766 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4767 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4768
4769 handled |= CSR_INT_BIT_WAKEUP;
4770 }
4771
4772 /* All uCode command responses, including Tx command responses,
4773 * Rx "responses" (frame-received notification), and other
4774 * notifications from uCode come through here*/
4775 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4776 iwl_rx_handle(priv);
4777 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4778 }
4779
4780 if (inta & CSR_INT_BIT_FH_TX) {
4781 IWL_DEBUG_ISR("Tx interrupt\n");
4782
4783 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4784 if (!iwl_grab_restricted_access(priv)) {
4785 iwl_write_restricted(priv,
4786 FH_TCSR_CREDIT
4787 (ALM_FH_SRVC_CHNL), 0x0);
4788 iwl_release_restricted_access(priv);
4789 }
4790 handled |= CSR_INT_BIT_FH_TX;
4791 }
4792
4793 if (inta & ~handled)
4794 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4795
4796 if (inta & ~CSR_INI_SET_MASK) {
4797 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4798 inta & ~CSR_INI_SET_MASK);
4799 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4800 }
4801
4802 /* Re-enable all interrupts */
4803 iwl_enable_interrupts(priv);
4804
4805 #ifdef CONFIG_IWLWIFI_DEBUG
4806 if (iwl_debug_level & (IWL_DL_ISR)) {
4807 inta = iwl_read32(priv, CSR_INT);
4808 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4809 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4810 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4811 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4812 }
4813 #endif
4814 spin_unlock_irqrestore(&priv->lock, flags);
4815 }
4816
4817 static irqreturn_t iwl_isr(int irq, void *data)
4818 {
4819 struct iwl_priv *priv = data;
4820 u32 inta, inta_mask;
4821 u32 inta_fh;
4822 if (!priv)
4823 return IRQ_NONE;
4824
4825 spin_lock(&priv->lock);
4826
4827 /* Disable (but don't clear!) interrupts here to avoid
4828 * back-to-back ISRs and sporadic interrupts from our NIC.
4829 * If we have something to service, the tasklet will re-enable ints.
4830 * If we *don't* have something, we'll re-enable before leaving here. */
4831 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4832 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4833
4834 /* Discover which interrupts are active/pending */
4835 inta = iwl_read32(priv, CSR_INT);
4836 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4837
4838 /* Ignore interrupt if there's nothing in NIC to service.
4839 * This may be due to IRQ shared with another device,
4840 * or due to sporadic interrupts thrown from our NIC. */
4841 if (!inta && !inta_fh) {
4842 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4843 goto none;
4844 }
4845
4846 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4847 /* Hardware disappeared */
4848 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4849 goto none;
4850 }
4851
4852 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4853 inta, inta_mask, inta_fh);
4854
4855 /* iwl_irq_tasklet() will service interrupts and re-enable them */
4856 tasklet_schedule(&priv->irq_tasklet);
4857 spin_unlock(&priv->lock);
4858
4859 return IRQ_HANDLED;
4860
4861 none:
4862 /* re-enable interrupts here since we don't have anything to service. */
4863 iwl_enable_interrupts(priv);
4864 spin_unlock(&priv->lock);
4865 return IRQ_NONE;
4866 }
4867
4868 /************************** EEPROM BANDS ****************************
4869 *
4870 * The iwl_eeprom_band definitions below provide the mapping from the
4871 * EEPROM contents to the specific channel number supported for each
4872 * band.
4873 *
4874 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4875 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4876 * The specific geography and calibration information for that channel
4877 * is contained in the eeprom map itself.
4878 *
4879 * During init, we copy the eeprom information and channel map
4880 * information into priv->channel_info_24/52 and priv->channel_map_24/52
4881 *
4882 * channel_map_24/52 provides the index in the channel_info array for a
4883 * given channel. We have to have two separate maps as there is channel
4884 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4885 * band_2
4886 *
4887 * A value of 0xff stored in the channel_map indicates that the channel
4888 * is not supported by the hardware at all.
4889 *
4890 * A value of 0xfe in the channel_map indicates that the channel is not
4891 * valid for Tx with the current hardware. This means that
4892 * while the system can tune and receive on a given channel, it may not
4893 * be able to associate or transmit any frames on that
4894 * channel. There is no corresponding channel information for that
4895 * entry.
4896 *
4897 *********************************************************************/
4898
4899 /* 2.4 GHz */
4900 static const u8 iwl_eeprom_band_1[14] = {
4901 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4902 };
4903
4904 /* 5.2 GHz bands */
4905 static const u8 iwl_eeprom_band_2[] = {
4906 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4907 };
4908
4909 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4910 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4911 };
4912
4913 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4914 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4915 };
4916
4917 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4918 145, 149, 153, 157, 161, 165
4919 };
4920
4921 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4922 int *eeprom_ch_count,
4923 const struct iwl_eeprom_channel
4924 **eeprom_ch_info,
4925 const u8 **eeprom_ch_index)
4926 {
4927 switch (band) {
4928 case 1: /* 2.4GHz band */
4929 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4930 *eeprom_ch_info = priv->eeprom.band_1_channels;
4931 *eeprom_ch_index = iwl_eeprom_band_1;
4932 break;
4933 case 2: /* 5.2GHz band */
4934 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4935 *eeprom_ch_info = priv->eeprom.band_2_channels;
4936 *eeprom_ch_index = iwl_eeprom_band_2;
4937 break;
4938 case 3: /* 5.2GHz band */
4939 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4940 *eeprom_ch_info = priv->eeprom.band_3_channels;
4941 *eeprom_ch_index = iwl_eeprom_band_3;
4942 break;
4943 case 4: /* 5.2GHz band */
4944 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4945 *eeprom_ch_info = priv->eeprom.band_4_channels;
4946 *eeprom_ch_index = iwl_eeprom_band_4;
4947 break;
4948 case 5: /* 5.2GHz band */
4949 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4950 *eeprom_ch_info = priv->eeprom.band_5_channels;
4951 *eeprom_ch_index = iwl_eeprom_band_5;
4952 break;
4953 default:
4954 BUG();
4955 return;
4956 }
4957 }
4958
4959 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4960 int phymode, u16 channel)
4961 {
4962 int i;
4963
4964 switch (phymode) {
4965 case MODE_IEEE80211A:
4966 for (i = 14; i < priv->channel_count; i++) {
4967 if (priv->channel_info[i].channel == channel)
4968 return &priv->channel_info[i];
4969 }
4970 break;
4971
4972 case MODE_IEEE80211B:
4973 case MODE_IEEE80211G:
4974 if (channel >= 1 && channel <= 14)
4975 return &priv->channel_info[channel - 1];
4976 break;
4977
4978 }
4979
4980 return NULL;
4981 }
4982
4983 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4984 ? # x " " : "")
4985
4986 static int iwl_init_channel_map(struct iwl_priv *priv)
4987 {
4988 int eeprom_ch_count = 0;
4989 const u8 *eeprom_ch_index = NULL;
4990 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4991 int band, ch;
4992 struct iwl_channel_info *ch_info;
4993
4994 if (priv->channel_count) {
4995 IWL_DEBUG_INFO("Channel map already initialized.\n");
4996 return 0;
4997 }
4998
4999 if (priv->eeprom.version < 0x2f) {
5000 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5001 priv->eeprom.version);
5002 return -EINVAL;
5003 }
5004
5005 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5006
5007 priv->channel_count =
5008 ARRAY_SIZE(iwl_eeprom_band_1) +
5009 ARRAY_SIZE(iwl_eeprom_band_2) +
5010 ARRAY_SIZE(iwl_eeprom_band_3) +
5011 ARRAY_SIZE(iwl_eeprom_band_4) +
5012 ARRAY_SIZE(iwl_eeprom_band_5);
5013
5014 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5015
5016 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5017 priv->channel_count, GFP_KERNEL);
5018 if (!priv->channel_info) {
5019 IWL_ERROR("Could not allocate channel_info\n");
5020 priv->channel_count = 0;
5021 return -ENOMEM;
5022 }
5023
5024 ch_info = priv->channel_info;
5025
5026 /* Loop through the 5 EEPROM bands adding them in order to the
5027 * channel map we maintain (that contains additional information than
5028 * what just in the EEPROM) */
5029 for (band = 1; band <= 5; band++) {
5030
5031 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5032 &eeprom_ch_info, &eeprom_ch_index);
5033
5034 /* Loop through each band adding each of the channels */
5035 for (ch = 0; ch < eeprom_ch_count; ch++) {
5036 ch_info->channel = eeprom_ch_index[ch];
5037 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5038 MODE_IEEE80211A;
5039
5040 /* permanently store EEPROM's channel regulatory flags
5041 * and max power in channel info database. */
5042 ch_info->eeprom = eeprom_ch_info[ch];
5043
5044 /* Copy the run-time flags so they are there even on
5045 * invalid channels */
5046 ch_info->flags = eeprom_ch_info[ch].flags;
5047
5048 if (!(is_channel_valid(ch_info))) {
5049 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5050 "No traffic\n",
5051 ch_info->channel,
5052 ch_info->flags,
5053 is_channel_a_band(ch_info) ?
5054 "5.2" : "2.4");
5055 ch_info++;
5056 continue;
5057 }
5058
5059 /* Initialize regulatory-based run-time data */
5060 ch_info->max_power_avg = ch_info->curr_txpow =
5061 eeprom_ch_info[ch].max_power_avg;
5062 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5063 ch_info->min_power = 0;
5064
5065 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5066 " %ddBm): Ad-Hoc %ssupported\n",
5067 ch_info->channel,
5068 is_channel_a_band(ch_info) ?
5069 "5.2" : "2.4",
5070 CHECK_AND_PRINT(IBSS),
5071 CHECK_AND_PRINT(ACTIVE),
5072 CHECK_AND_PRINT(RADAR),
5073 CHECK_AND_PRINT(WIDE),
5074 CHECK_AND_PRINT(NARROW),
5075 CHECK_AND_PRINT(DFS),
5076 eeprom_ch_info[ch].flags,
5077 eeprom_ch_info[ch].max_power_avg,
5078 ((eeprom_ch_info[ch].
5079 flags & EEPROM_CHANNEL_IBSS)
5080 && !(eeprom_ch_info[ch].
5081 flags & EEPROM_CHANNEL_RADAR))
5082 ? "" : "not ");
5083
5084 /* Set the user_txpower_limit to the highest power
5085 * supported by any channel */
5086 if (eeprom_ch_info[ch].max_power_avg >
5087 priv->user_txpower_limit)
5088 priv->user_txpower_limit =
5089 eeprom_ch_info[ch].max_power_avg;
5090
5091 ch_info++;
5092 }
5093 }
5094
5095 if (iwl3945_txpower_set_from_eeprom(priv))
5096 return -EIO;
5097
5098 return 0;
5099 }
5100
5101 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5102 * sending probe req. This should be set long enough to hear probe responses
5103 * from more than one AP. */
5104 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5105 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5106
5107 /* For faster active scanning, scan will move to the next channel if fewer than
5108 * PLCP_QUIET_THRESH packets are heard on this channel within
5109 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5110 * time if it's a quiet channel (nothing responded to our probe, and there's
5111 * no other traffic).
5112 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5113 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5114 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5115
5116 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5117 * Must be set longer than active dwell time.
5118 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5119 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5120 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5121 #define IWL_PASSIVE_DWELL_BASE (100)
5122 #define IWL_CHANNEL_TUNE_TIME 5
5123
5124 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5125 {
5126 if (phymode == MODE_IEEE80211A)
5127 return IWL_ACTIVE_DWELL_TIME_52;
5128 else
5129 return IWL_ACTIVE_DWELL_TIME_24;
5130 }
5131
5132 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5133 {
5134 u16 active = iwl_get_active_dwell_time(priv, phymode);
5135 u16 passive = (phymode != MODE_IEEE80211A) ?
5136 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5137 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5138
5139 if (iwl_is_associated(priv)) {
5140 /* If we're associated, we clamp the maximum passive
5141 * dwell time to be 98% of the beacon interval (minus
5142 * 2 * channel tune time) */
5143 passive = priv->beacon_int;
5144 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5145 passive = IWL_PASSIVE_DWELL_BASE;
5146 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5147 }
5148
5149 if (passive <= active)
5150 passive = active + 1;
5151
5152 return passive;
5153 }
5154
5155 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5156 u8 is_active, u8 direct_mask,
5157 struct iwl_scan_channel *scan_ch)
5158 {
5159 const struct ieee80211_channel *channels = NULL;
5160 const struct ieee80211_hw_mode *hw_mode;
5161 const struct iwl_channel_info *ch_info;
5162 u16 passive_dwell = 0;
5163 u16 active_dwell = 0;
5164 int added, i;
5165
5166 hw_mode = iwl_get_hw_mode(priv, phymode);
5167 if (!hw_mode)
5168 return 0;
5169
5170 channels = hw_mode->channels;
5171
5172 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5173 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5174
5175 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5176 if (channels[i].chan ==
5177 le16_to_cpu(priv->active_rxon.channel)) {
5178 if (iwl_is_associated(priv)) {
5179 IWL_DEBUG_SCAN
5180 ("Skipping current channel %d\n",
5181 le16_to_cpu(priv->active_rxon.channel));
5182 continue;
5183 }
5184 } else if (priv->only_active_channel)
5185 continue;
5186
5187 scan_ch->channel = channels[i].chan;
5188
5189 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5190 if (!is_channel_valid(ch_info)) {
5191 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5192 scan_ch->channel);
5193 continue;
5194 }
5195
5196 if (!is_active || is_channel_passive(ch_info) ||
5197 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5198 scan_ch->type = 0; /* passive */
5199 else
5200 scan_ch->type = 1; /* active */
5201
5202 if (scan_ch->type & 1)
5203 scan_ch->type |= (direct_mask << 1);
5204
5205 if (is_channel_narrow(ch_info))
5206 scan_ch->type |= (1 << 7);
5207
5208 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5209 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5210
5211 /* Set power levels to defaults */
5212 scan_ch->tpc.dsp_atten = 110;
5213 /* scan_pwr_info->tpc.dsp_atten; */
5214
5215 /*scan_pwr_info->tpc.tx_gain; */
5216 if (phymode == MODE_IEEE80211A)
5217 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5218 else {
5219 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5220 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5221 * power level
5222 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5223 */
5224 }
5225
5226 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5227 scan_ch->channel,
5228 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5229 (scan_ch->type & 1) ?
5230 active_dwell : passive_dwell);
5231
5232 scan_ch++;
5233 added++;
5234 }
5235
5236 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5237 return added;
5238 }
5239
5240 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5241 {
5242 int i, j;
5243 for (i = 0; i < 3; i++) {
5244 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5245 for (j = 0; j < hw_mode->num_channels; j++)
5246 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5247 }
5248 }
5249
5250 static void iwl_init_hw_rates(struct iwl_priv *priv,
5251 struct ieee80211_rate *rates)
5252 {
5253 int i;
5254
5255 for (i = 0; i < IWL_RATE_COUNT; i++) {
5256 rates[i].rate = iwl_rates[i].ieee * 5;
5257 rates[i].val = i; /* Rate scaling will work on indexes */
5258 rates[i].val2 = i;
5259 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5260 /* Only OFDM have the bits-per-symbol set */
5261 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5262 rates[i].flags |= IEEE80211_RATE_OFDM;
5263 else {
5264 /*
5265 * If CCK 1M then set rate flag to CCK else CCK_2
5266 * which is CCK | PREAMBLE2
5267 */
5268 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5269 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5270 }
5271
5272 /* Set up which ones are basic rates... */
5273 if (IWL_BASIC_RATES_MASK & (1 << i))
5274 rates[i].flags |= IEEE80211_RATE_BASIC;
5275 }
5276 }
5277
5278 /**
5279 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5280 */
5281 static int iwl_init_geos(struct iwl_priv *priv)
5282 {
5283 struct iwl_channel_info *ch;
5284 struct ieee80211_hw_mode *modes;
5285 struct ieee80211_channel *channels;
5286 struct ieee80211_channel *geo_ch;
5287 struct ieee80211_rate *rates;
5288 int i = 0;
5289 enum {
5290 A = 0,
5291 B = 1,
5292 G = 2,
5293 };
5294 int mode_count = 3;
5295
5296 if (priv->modes) {
5297 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5298 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5299 return 0;
5300 }
5301
5302 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5303 GFP_KERNEL);
5304 if (!modes)
5305 return -ENOMEM;
5306
5307 channels = kzalloc(sizeof(struct ieee80211_channel) *
5308 priv->channel_count, GFP_KERNEL);
5309 if (!channels) {
5310 kfree(modes);
5311 return -ENOMEM;
5312 }
5313
5314 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5315 GFP_KERNEL);
5316 if (!rates) {
5317 kfree(modes);
5318 kfree(channels);
5319 return -ENOMEM;
5320 }
5321
5322 /* 0 = 802.11a
5323 * 1 = 802.11b
5324 * 2 = 802.11g
5325 */
5326
5327 /* 5.2GHz channels start after the 2.4GHz channels */
5328 modes[A].mode = MODE_IEEE80211A;
5329 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5330 modes[A].rates = rates;
5331 modes[A].num_rates = 8; /* just OFDM */
5332 modes[A].num_channels = 0;
5333
5334 modes[B].mode = MODE_IEEE80211B;
5335 modes[B].channels = channels;
5336 modes[B].rates = &rates[8];
5337 modes[B].num_rates = 4; /* just CCK */
5338 modes[B].num_channels = 0;
5339
5340 modes[G].mode = MODE_IEEE80211G;
5341 modes[G].channels = channels;
5342 modes[G].rates = rates;
5343 modes[G].num_rates = 12; /* OFDM & CCK */
5344 modes[G].num_channels = 0;
5345
5346 priv->ieee_channels = channels;
5347 priv->ieee_rates = rates;
5348
5349 iwl_init_hw_rates(priv, rates);
5350
5351 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5352 ch = &priv->channel_info[i];
5353
5354 if (!is_channel_valid(ch)) {
5355 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5356 "skipping.\n",
5357 ch->channel, is_channel_a_band(ch) ?
5358 "5.2" : "2.4");
5359 continue;
5360 }
5361
5362 if (is_channel_a_band(ch))
5363 geo_ch = &modes[A].channels[modes[A].num_channels++];
5364 else {
5365 geo_ch = &modes[B].channels[modes[B].num_channels++];
5366 modes[G].num_channels++;
5367 }
5368
5369 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5370 geo_ch->chan = ch->channel;
5371 geo_ch->power_level = ch->max_power_avg;
5372 geo_ch->antenna_max = 0xff;
5373
5374 if (is_channel_valid(ch)) {
5375 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5376 if (ch->flags & EEPROM_CHANNEL_IBSS)
5377 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5378
5379 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5380 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5381
5382 if (ch->flags & EEPROM_CHANNEL_RADAR)
5383 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5384
5385 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5386 priv->max_channel_txpower_limit =
5387 ch->max_power_avg;
5388 }
5389
5390 geo_ch->val = geo_ch->flag;
5391 }
5392
5393 if ((modes[A].num_channels == 0) && priv->is_abg) {
5394 printk(KERN_INFO DRV_NAME
5395 ": Incorrectly detected BG card as ABG. Please send "
5396 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5397 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5398 priv->is_abg = 0;
5399 }
5400
5401 printk(KERN_INFO DRV_NAME
5402 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5403 modes[G].num_channels, modes[A].num_channels);
5404
5405 /*
5406 * NOTE: We register these in preference of order -- the
5407 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5408 * a phymode based on rates or AP capabilities but seems to
5409 * configure it purely on if the channel being configured
5410 * is supported by a mode -- and the first match is taken
5411 */
5412
5413 if (modes[G].num_channels)
5414 ieee80211_register_hwmode(priv->hw, &modes[G]);
5415 if (modes[B].num_channels)
5416 ieee80211_register_hwmode(priv->hw, &modes[B]);
5417 if (modes[A].num_channels)
5418 ieee80211_register_hwmode(priv->hw, &modes[A]);
5419
5420 priv->modes = modes;
5421 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5422
5423 return 0;
5424 }
5425
5426 /******************************************************************************
5427 *
5428 * uCode download functions
5429 *
5430 ******************************************************************************/
5431
5432 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5433 {
5434 if (priv->ucode_code.v_addr != NULL) {
5435 pci_free_consistent(priv->pci_dev,
5436 priv->ucode_code.len,
5437 priv->ucode_code.v_addr,
5438 priv->ucode_code.p_addr);
5439 priv->ucode_code.v_addr = NULL;
5440 }
5441 if (priv->ucode_data.v_addr != NULL) {
5442 pci_free_consistent(priv->pci_dev,
5443 priv->ucode_data.len,
5444 priv->ucode_data.v_addr,
5445 priv->ucode_data.p_addr);
5446 priv->ucode_data.v_addr = NULL;
5447 }
5448 if (priv->ucode_data_backup.v_addr != NULL) {
5449 pci_free_consistent(priv->pci_dev,
5450 priv->ucode_data_backup.len,
5451 priv->ucode_data_backup.v_addr,
5452 priv->ucode_data_backup.p_addr);
5453 priv->ucode_data_backup.v_addr = NULL;
5454 }
5455 if (priv->ucode_init.v_addr != NULL) {
5456 pci_free_consistent(priv->pci_dev,
5457 priv->ucode_init.len,
5458 priv->ucode_init.v_addr,
5459 priv->ucode_init.p_addr);
5460 priv->ucode_init.v_addr = NULL;
5461 }
5462 if (priv->ucode_init_data.v_addr != NULL) {
5463 pci_free_consistent(priv->pci_dev,
5464 priv->ucode_init_data.len,
5465 priv->ucode_init_data.v_addr,
5466 priv->ucode_init_data.p_addr);
5467 priv->ucode_init_data.v_addr = NULL;
5468 }
5469 if (priv->ucode_boot.v_addr != NULL) {
5470 pci_free_consistent(priv->pci_dev,
5471 priv->ucode_boot.len,
5472 priv->ucode_boot.v_addr,
5473 priv->ucode_boot.p_addr);
5474 priv->ucode_boot.v_addr = NULL;
5475 }
5476 }
5477
5478 /**
5479 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5480 * looking at all data.
5481 */
5482 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5483 {
5484 u32 val;
5485 u32 save_len = len;
5486 int rc = 0;
5487 u32 errcnt;
5488
5489 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5490
5491 rc = iwl_grab_restricted_access(priv);
5492 if (rc)
5493 return rc;
5494
5495 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5496
5497 errcnt = 0;
5498 for (; len > 0; len -= sizeof(u32), image++) {
5499 /* read data comes through single port, auto-incr addr */
5500 /* NOTE: Use the debugless read so we don't flood kernel log
5501 * if IWL_DL_IO is set */
5502 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5503 if (val != le32_to_cpu(*image)) {
5504 IWL_ERROR("uCode INST section is invalid at "
5505 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5506 save_len - len, val, le32_to_cpu(*image));
5507 rc = -EIO;
5508 errcnt++;
5509 if (errcnt >= 20)
5510 break;
5511 }
5512 }
5513
5514 iwl_release_restricted_access(priv);
5515
5516 if (!errcnt)
5517 IWL_DEBUG_INFO
5518 ("ucode image in INSTRUCTION memory is good\n");
5519
5520 return rc;
5521 }
5522
5523
5524 /**
5525 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5526 * using sample data 100 bytes apart. If these sample points are good,
5527 * it's a pretty good bet that everything between them is good, too.
5528 */
5529 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5530 {
5531 u32 val;
5532 int rc = 0;
5533 u32 errcnt = 0;
5534 u32 i;
5535
5536 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5537
5538 rc = iwl_grab_restricted_access(priv);
5539 if (rc)
5540 return rc;
5541
5542 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5543 /* read data comes through single port, auto-incr addr */
5544 /* NOTE: Use the debugless read so we don't flood kernel log
5545 * if IWL_DL_IO is set */
5546 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5547 i + RTC_INST_LOWER_BOUND);
5548 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5549 if (val != le32_to_cpu(*image)) {
5550 #if 0 /* Enable this if you want to see details */
5551 IWL_ERROR("uCode INST section is invalid at "
5552 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5553 i, val, *image);
5554 #endif
5555 rc = -EIO;
5556 errcnt++;
5557 if (errcnt >= 3)
5558 break;
5559 }
5560 }
5561
5562 iwl_release_restricted_access(priv);
5563
5564 return rc;
5565 }
5566
5567
5568 /**
5569 * iwl_verify_ucode - determine which instruction image is in SRAM,
5570 * and verify its contents
5571 */
5572 static int iwl_verify_ucode(struct iwl_priv *priv)
5573 {
5574 __le32 *image;
5575 u32 len;
5576 int rc = 0;
5577
5578 /* Try bootstrap */
5579 image = (__le32 *)priv->ucode_boot.v_addr;
5580 len = priv->ucode_boot.len;
5581 rc = iwl_verify_inst_sparse(priv, image, len);
5582 if (rc == 0) {
5583 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5584 return 0;
5585 }
5586
5587 /* Try initialize */
5588 image = (__le32 *)priv->ucode_init.v_addr;
5589 len = priv->ucode_init.len;
5590 rc = iwl_verify_inst_sparse(priv, image, len);
5591 if (rc == 0) {
5592 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5593 return 0;
5594 }
5595
5596 /* Try runtime/protocol */
5597 image = (__le32 *)priv->ucode_code.v_addr;
5598 len = priv->ucode_code.len;
5599 rc = iwl_verify_inst_sparse(priv, image, len);
5600 if (rc == 0) {
5601 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5602 return 0;
5603 }
5604
5605 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5606
5607 /* Show first several data entries in instruction SRAM.
5608 * Selection of bootstrap image is arbitrary. */
5609 image = (__le32 *)priv->ucode_boot.v_addr;
5610 len = priv->ucode_boot.len;
5611 rc = iwl_verify_inst_full(priv, image, len);
5612
5613 return rc;
5614 }
5615
5616
5617 /* check contents of special bootstrap uCode SRAM */
5618 static int iwl_verify_bsm(struct iwl_priv *priv)
5619 {
5620 __le32 *image = priv->ucode_boot.v_addr;
5621 u32 len = priv->ucode_boot.len;
5622 u32 reg;
5623 u32 val;
5624
5625 IWL_DEBUG_INFO("Begin verify bsm\n");
5626
5627 /* verify BSM SRAM contents */
5628 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5629 for (reg = BSM_SRAM_LOWER_BOUND;
5630 reg < BSM_SRAM_LOWER_BOUND + len;
5631 reg += sizeof(u32), image ++) {
5632 val = iwl_read_restricted_reg(priv, reg);
5633 if (val != le32_to_cpu(*image)) {
5634 IWL_ERROR("BSM uCode verification failed at "
5635 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5636 BSM_SRAM_LOWER_BOUND,
5637 reg - BSM_SRAM_LOWER_BOUND, len,
5638 val, le32_to_cpu(*image));
5639 return -EIO;
5640 }
5641 }
5642
5643 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5644
5645 return 0;
5646 }
5647
5648 /**
5649 * iwl_load_bsm - Load bootstrap instructions
5650 *
5651 * BSM operation:
5652 *
5653 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5654 * in special SRAM that does not power down during RFKILL. When powering back
5655 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5656 * the bootstrap program into the on-board processor, and starts it.
5657 *
5658 * The bootstrap program loads (via DMA) instructions and data for a new
5659 * program from host DRAM locations indicated by the host driver in the
5660 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5661 * automatically.
5662 *
5663 * When initializing the NIC, the host driver points the BSM to the
5664 * "initialize" uCode image. This uCode sets up some internal data, then
5665 * notifies host via "initialize alive" that it is complete.
5666 *
5667 * The host then replaces the BSM_DRAM_* pointer values to point to the
5668 * normal runtime uCode instructions and a backup uCode data cache buffer
5669 * (filled initially with starting data values for the on-board processor),
5670 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5671 * which begins normal operation.
5672 *
5673 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5674 * the backup data cache in DRAM before SRAM is powered down.
5675 *
5676 * When powering back up, the BSM loads the bootstrap program. This reloads
5677 * the runtime uCode instructions and the backup data cache into SRAM,
5678 * and re-launches the runtime uCode from where it left off.
5679 */
5680 static int iwl_load_bsm(struct iwl_priv *priv)
5681 {
5682 __le32 *image = priv->ucode_boot.v_addr;
5683 u32 len = priv->ucode_boot.len;
5684 dma_addr_t pinst;
5685 dma_addr_t pdata;
5686 u32 inst_len;
5687 u32 data_len;
5688 int rc;
5689 int i;
5690 u32 done;
5691 u32 reg_offset;
5692
5693 IWL_DEBUG_INFO("Begin load bsm\n");
5694
5695 /* make sure bootstrap program is no larger than BSM's SRAM size */
5696 if (len > IWL_MAX_BSM_SIZE)
5697 return -EINVAL;
5698
5699 /* Tell bootstrap uCode where to find the "Initialize" uCode
5700 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5701 * NOTE: iwl_initialize_alive_start() will replace these values,
5702 * after the "initialize" uCode has run, to point to
5703 * runtime/protocol instructions and backup data cache. */
5704 pinst = priv->ucode_init.p_addr;
5705 pdata = priv->ucode_init_data.p_addr;
5706 inst_len = priv->ucode_init.len;
5707 data_len = priv->ucode_init_data.len;
5708
5709 rc = iwl_grab_restricted_access(priv);
5710 if (rc)
5711 return rc;
5712
5713 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5714 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5715 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5716 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5717
5718 /* Fill BSM memory with bootstrap instructions */
5719 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5720 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5721 reg_offset += sizeof(u32), image++)
5722 _iwl_write_restricted_reg(priv, reg_offset,
5723 le32_to_cpu(*image));
5724
5725 rc = iwl_verify_bsm(priv);
5726 if (rc) {
5727 iwl_release_restricted_access(priv);
5728 return rc;
5729 }
5730
5731 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5732 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5733 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5734 RTC_INST_LOWER_BOUND);
5735 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5736
5737 /* Load bootstrap code into instruction SRAM now,
5738 * to prepare to load "initialize" uCode */
5739 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5740 BSM_WR_CTRL_REG_BIT_START);
5741
5742 /* Wait for load of bootstrap uCode to finish */
5743 for (i = 0; i < 100; i++) {
5744 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5745 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5746 break;
5747 udelay(10);
5748 }
5749 if (i < 100)
5750 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5751 else {
5752 IWL_ERROR("BSM write did not complete!\n");
5753 return -EIO;
5754 }
5755
5756 /* Enable future boot loads whenever power management unit triggers it
5757 * (e.g. when powering back up after power-save shutdown) */
5758 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5759 BSM_WR_CTRL_REG_BIT_START_EN);
5760
5761 iwl_release_restricted_access(priv);
5762
5763 return 0;
5764 }
5765
5766 static void iwl_nic_start(struct iwl_priv *priv)
5767 {
5768 /* Remove all resets to allow NIC to operate */
5769 iwl_write32(priv, CSR_RESET, 0);
5770 }
5771
5772 /**
5773 * iwl_read_ucode - Read uCode images from disk file.
5774 *
5775 * Copy into buffers for card to fetch via bus-mastering
5776 */
5777 static int iwl_read_ucode(struct iwl_priv *priv)
5778 {
5779 struct iwl_ucode *ucode;
5780 int rc = 0;
5781 const struct firmware *ucode_raw;
5782 /* firmware file name contains uCode/driver compatibility version */
5783 const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5784 u8 *src;
5785 size_t len;
5786 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5787
5788 /* Ask kernel firmware_class module to get the boot firmware off disk.
5789 * request_firmware() is synchronous, file is in memory on return. */
5790 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5791 if (rc < 0) {
5792 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5793 goto error;
5794 }
5795
5796 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5797 name, ucode_raw->size);
5798
5799 /* Make sure that we got at least our header! */
5800 if (ucode_raw->size < sizeof(*ucode)) {
5801 IWL_ERROR("File size way too small!\n");
5802 rc = -EINVAL;
5803 goto err_release;
5804 }
5805
5806 /* Data from ucode file: header followed by uCode images */
5807 ucode = (void *)ucode_raw->data;
5808
5809 ver = le32_to_cpu(ucode->ver);
5810 inst_size = le32_to_cpu(ucode->inst_size);
5811 data_size = le32_to_cpu(ucode->data_size);
5812 init_size = le32_to_cpu(ucode->init_size);
5813 init_data_size = le32_to_cpu(ucode->init_data_size);
5814 boot_size = le32_to_cpu(ucode->boot_size);
5815
5816 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5817 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5818 inst_size);
5819 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5820 data_size);
5821 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5822 init_size);
5823 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5824 init_data_size);
5825 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5826 boot_size);
5827
5828 /* Verify size of file vs. image size info in file's header */
5829 if (ucode_raw->size < sizeof(*ucode) +
5830 inst_size + data_size + init_size +
5831 init_data_size + boot_size) {
5832
5833 IWL_DEBUG_INFO("uCode file size %d too small\n",
5834 (int)ucode_raw->size);
5835 rc = -EINVAL;
5836 goto err_release;
5837 }
5838
5839 /* Verify that uCode images will fit in card's SRAM */
5840 if (inst_size > IWL_MAX_INST_SIZE) {
5841 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5842 (int)inst_size);
5843 rc = -EINVAL;
5844 goto err_release;
5845 }
5846
5847 if (data_size > IWL_MAX_DATA_SIZE) {
5848 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5849 (int)data_size);
5850 rc = -EINVAL;
5851 goto err_release;
5852 }
5853 if (init_size > IWL_MAX_INST_SIZE) {
5854 IWL_DEBUG_INFO
5855 ("uCode init instr len %d too large to fit in card\n",
5856 (int)init_size);
5857 rc = -EINVAL;
5858 goto err_release;
5859 }
5860 if (init_data_size > IWL_MAX_DATA_SIZE) {
5861 IWL_DEBUG_INFO
5862 ("uCode init data len %d too large to fit in card\n",
5863 (int)init_data_size);
5864 rc = -EINVAL;
5865 goto err_release;
5866 }
5867 if (boot_size > IWL_MAX_BSM_SIZE) {
5868 IWL_DEBUG_INFO
5869 ("uCode boot instr len %d too large to fit in bsm\n",
5870 (int)boot_size);
5871 rc = -EINVAL;
5872 goto err_release;
5873 }
5874
5875 /* Allocate ucode buffers for card's bus-master loading ... */
5876
5877 /* Runtime instructions and 2 copies of data:
5878 * 1) unmodified from disk
5879 * 2) backup cache for save/restore during power-downs */
5880 priv->ucode_code.len = inst_size;
5881 priv->ucode_code.v_addr =
5882 pci_alloc_consistent(priv->pci_dev,
5883 priv->ucode_code.len,
5884 &(priv->ucode_code.p_addr));
5885
5886 priv->ucode_data.len = data_size;
5887 priv->ucode_data.v_addr =
5888 pci_alloc_consistent(priv->pci_dev,
5889 priv->ucode_data.len,
5890 &(priv->ucode_data.p_addr));
5891
5892 priv->ucode_data_backup.len = data_size;
5893 priv->ucode_data_backup.v_addr =
5894 pci_alloc_consistent(priv->pci_dev,
5895 priv->ucode_data_backup.len,
5896 &(priv->ucode_data_backup.p_addr));
5897
5898
5899 /* Initialization instructions and data */
5900 priv->ucode_init.len = init_size;
5901 priv->ucode_init.v_addr =
5902 pci_alloc_consistent(priv->pci_dev,
5903 priv->ucode_init.len,
5904 &(priv->ucode_init.p_addr));
5905
5906 priv->ucode_init_data.len = init_data_size;
5907 priv->ucode_init_data.v_addr =
5908 pci_alloc_consistent(priv->pci_dev,
5909 priv->ucode_init_data.len,
5910 &(priv->ucode_init_data.p_addr));
5911
5912 /* Bootstrap (instructions only, no data) */
5913 priv->ucode_boot.len = boot_size;
5914 priv->ucode_boot.v_addr =
5915 pci_alloc_consistent(priv->pci_dev,
5916 priv->ucode_boot.len,
5917 &(priv->ucode_boot.p_addr));
5918
5919 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5920 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5921 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5922 goto err_pci_alloc;
5923
5924 /* Copy images into buffers for card's bus-master reads ... */
5925
5926 /* Runtime instructions (first block of data in file) */
5927 src = &ucode->data[0];
5928 len = priv->ucode_code.len;
5929 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5930 (int)len);
5931 memcpy(priv->ucode_code.v_addr, src, len);
5932 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5933 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5934
5935 /* Runtime data (2nd block)
5936 * NOTE: Copy into backup buffer will be done in iwl_up() */
5937 src = &ucode->data[inst_size];
5938 len = priv->ucode_data.len;
5939 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5940 (int)len);
5941 memcpy(priv->ucode_data.v_addr, src, len);
5942 memcpy(priv->ucode_data_backup.v_addr, src, len);
5943
5944 /* Initialization instructions (3rd block) */
5945 if (init_size) {
5946 src = &ucode->data[inst_size + data_size];
5947 len = priv->ucode_init.len;
5948 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5949 (int)len);
5950 memcpy(priv->ucode_init.v_addr, src, len);
5951 }
5952
5953 /* Initialization data (4th block) */
5954 if (init_data_size) {
5955 src = &ucode->data[inst_size + data_size + init_size];
5956 len = priv->ucode_init_data.len;
5957 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5958 (int)len);
5959 memcpy(priv->ucode_init_data.v_addr, src, len);
5960 }
5961
5962 /* Bootstrap instructions (5th block) */
5963 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5964 len = priv->ucode_boot.len;
5965 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5966 (int)len);
5967 memcpy(priv->ucode_boot.v_addr, src, len);
5968
5969 /* We have our copies now, allow OS release its copies */
5970 release_firmware(ucode_raw);
5971 return 0;
5972
5973 err_pci_alloc:
5974 IWL_ERROR("failed to allocate pci memory\n");
5975 rc = -ENOMEM;
5976 iwl_dealloc_ucode_pci(priv);
5977
5978 err_release:
5979 release_firmware(ucode_raw);
5980
5981 error:
5982 return rc;
5983 }
5984
5985
5986 /**
5987 * iwl_set_ucode_ptrs - Set uCode address location
5988 *
5989 * Tell initialization uCode where to find runtime uCode.
5990 *
5991 * BSM registers initially contain pointers to initialization uCode.
5992 * We need to replace them to load runtime uCode inst and data,
5993 * and to save runtime data when powering down.
5994 */
5995 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
5996 {
5997 dma_addr_t pinst;
5998 dma_addr_t pdata;
5999 int rc = 0;
6000 unsigned long flags;
6001
6002 /* bits 31:0 for 3945 */
6003 pinst = priv->ucode_code.p_addr;
6004 pdata = priv->ucode_data_backup.p_addr;
6005
6006 spin_lock_irqsave(&priv->lock, flags);
6007 rc = iwl_grab_restricted_access(priv);
6008 if (rc) {
6009 spin_unlock_irqrestore(&priv->lock, flags);
6010 return rc;
6011 }
6012
6013 /* Tell bootstrap uCode where to find image to load */
6014 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6015 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6016 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6017 priv->ucode_data.len);
6018
6019 /* Inst bytecount must be last to set up, bit 31 signals uCode
6020 * that all new ptr/size info is in place */
6021 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6022 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6023
6024 iwl_release_restricted_access(priv);
6025
6026 spin_unlock_irqrestore(&priv->lock, flags);
6027
6028 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6029
6030 return rc;
6031 }
6032
6033 /**
6034 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6035 *
6036 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6037 *
6038 * The 4965 "initialize" ALIVE reply contains calibration data for:
6039 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6040 * (3945 does not contain this data).
6041 *
6042 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6043 */
6044 static void iwl_init_alive_start(struct iwl_priv *priv)
6045 {
6046 /* Check alive response for "valid" sign from uCode */
6047 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6048 /* We had an error bringing up the hardware, so take it
6049 * all the way back down so we can try again */
6050 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6051 goto restart;
6052 }
6053
6054 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6055 * This is a paranoid check, because we would not have gotten the
6056 * "initialize" alive if code weren't properly loaded. */
6057 if (iwl_verify_ucode(priv)) {
6058 /* Runtime instruction load was bad;
6059 * take it all the way back down so we can try again */
6060 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6061 goto restart;
6062 }
6063
6064 /* Send pointers to protocol/runtime uCode image ... init code will
6065 * load and launch runtime uCode, which will send us another "Alive"
6066 * notification. */
6067 IWL_DEBUG_INFO("Initialization Alive received.\n");
6068 if (iwl_set_ucode_ptrs(priv)) {
6069 /* Runtime instruction load won't happen;
6070 * take it all the way back down so we can try again */
6071 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6072 goto restart;
6073 }
6074 return;
6075
6076 restart:
6077 queue_work(priv->workqueue, &priv->restart);
6078 }
6079
6080
6081 /**
6082 * iwl_alive_start - called after REPLY_ALIVE notification received
6083 * from protocol/runtime uCode (initialization uCode's
6084 * Alive gets handled by iwl_init_alive_start()).
6085 */
6086 static void iwl_alive_start(struct iwl_priv *priv)
6087 {
6088 int rc = 0;
6089 int thermal_spin = 0;
6090 u32 rfkill;
6091
6092 IWL_DEBUG_INFO("Runtime Alive received.\n");
6093
6094 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6095 /* We had an error bringing up the hardware, so take it
6096 * all the way back down so we can try again */
6097 IWL_DEBUG_INFO("Alive failed.\n");
6098 goto restart;
6099 }
6100
6101 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6102 * This is a paranoid check, because we would not have gotten the
6103 * "runtime" alive if code weren't properly loaded. */
6104 if (iwl_verify_ucode(priv)) {
6105 /* Runtime instruction load was bad;
6106 * take it all the way back down so we can try again */
6107 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6108 goto restart;
6109 }
6110
6111 iwl_clear_stations_table(priv);
6112
6113 rc = iwl_grab_restricted_access(priv);
6114 if (rc) {
6115 IWL_WARNING("Can not read rfkill status from adapter\n");
6116 return;
6117 }
6118
6119 rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6120 IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6121 iwl_release_restricted_access(priv);
6122
6123 if (rfkill & 0x1) {
6124 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6125 /* if rfkill is not on, then wait for thermal
6126 * sensor in adapter to kick in */
6127 while (iwl_hw_get_temperature(priv) == 0) {
6128 thermal_spin++;
6129 udelay(10);
6130 }
6131
6132 if (thermal_spin)
6133 IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6134 thermal_spin * 10);
6135 } else
6136 set_bit(STATUS_RF_KILL_HW, &priv->status);
6137
6138 /* After the ALIVE response, we can process host commands */
6139 set_bit(STATUS_ALIVE, &priv->status);
6140
6141 /* Clear out the uCode error bit if it is set */
6142 clear_bit(STATUS_FW_ERROR, &priv->status);
6143
6144 rc = iwl_init_channel_map(priv);
6145 if (rc) {
6146 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6147 return;
6148 }
6149
6150 iwl_init_geos(priv);
6151
6152 if (iwl_is_rfkill(priv))
6153 return;
6154
6155 if (!priv->mac80211_registered) {
6156 /* Unlock so any user space entry points can call back into
6157 * the driver without a deadlock... */
6158 mutex_unlock(&priv->mutex);
6159 iwl_rate_control_register(priv->hw);
6160 rc = ieee80211_register_hw(priv->hw);
6161 priv->hw->conf.beacon_int = 100;
6162 mutex_lock(&priv->mutex);
6163
6164 if (rc) {
6165 IWL_ERROR("Failed to register network "
6166 "device (error %d)\n", rc);
6167 return;
6168 }
6169
6170 priv->mac80211_registered = 1;
6171
6172 iwl_reset_channel_flag(priv);
6173 } else
6174 ieee80211_start_queues(priv->hw);
6175
6176 priv->active_rate = priv->rates_mask;
6177 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6178
6179 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6180
6181 if (iwl_is_associated(priv)) {
6182 struct iwl_rxon_cmd *active_rxon =
6183 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6184
6185 memcpy(&priv->staging_rxon, &priv->active_rxon,
6186 sizeof(priv->staging_rxon));
6187 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6188 } else {
6189 /* Initialize our rx_config data */
6190 iwl_connection_init_rx_config(priv);
6191 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6192 }
6193
6194 /* Configure BT coexistence */
6195 iwl_send_bt_config(priv);
6196
6197 /* Configure the adapter for unassociated operation */
6198 iwl_commit_rxon(priv);
6199
6200 /* At this point, the NIC is initialized and operational */
6201 priv->notif_missed_beacons = 0;
6202 set_bit(STATUS_READY, &priv->status);
6203
6204 iwl3945_reg_txpower_periodic(priv);
6205
6206 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6207
6208 if (priv->error_recovering)
6209 iwl_error_recovery(priv);
6210
6211 return;
6212
6213 restart:
6214 queue_work(priv->workqueue, &priv->restart);
6215 }
6216
6217 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6218
6219 static void __iwl_down(struct iwl_priv *priv)
6220 {
6221 unsigned long flags;
6222 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6223 struct ieee80211_conf *conf = NULL;
6224
6225 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6226
6227 conf = ieee80211_get_hw_conf(priv->hw);
6228
6229 if (!exit_pending)
6230 set_bit(STATUS_EXIT_PENDING, &priv->status);
6231
6232 iwl_clear_stations_table(priv);
6233
6234 /* Unblock any waiting calls */
6235 wake_up_interruptible_all(&priv->wait_command_queue);
6236
6237 iwl_cancel_deferred_work(priv);
6238
6239 /* Wipe out the EXIT_PENDING status bit if we are not actually
6240 * exiting the module */
6241 if (!exit_pending)
6242 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6243
6244 /* stop and reset the on-board processor */
6245 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6246
6247 /* tell the device to stop sending interrupts */
6248 iwl_disable_interrupts(priv);
6249
6250 if (priv->mac80211_registered)
6251 ieee80211_stop_queues(priv->hw);
6252
6253 /* If we have not previously called iwl_init() then
6254 * clear all bits but the RF Kill and SUSPEND bits and return */
6255 if (!iwl_is_init(priv)) {
6256 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6257 STATUS_RF_KILL_HW |
6258 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6259 STATUS_RF_KILL_SW |
6260 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6261 STATUS_IN_SUSPEND;
6262 goto exit;
6263 }
6264
6265 /* ...otherwise clear out all the status bits but the RF Kill and
6266 * SUSPEND bits and continue taking the NIC down. */
6267 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6268 STATUS_RF_KILL_HW |
6269 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6270 STATUS_RF_KILL_SW |
6271 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6272 STATUS_IN_SUSPEND |
6273 test_bit(STATUS_FW_ERROR, &priv->status) <<
6274 STATUS_FW_ERROR;
6275
6276 spin_lock_irqsave(&priv->lock, flags);
6277 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6278 spin_unlock_irqrestore(&priv->lock, flags);
6279
6280 iwl_hw_txq_ctx_stop(priv);
6281 iwl_hw_rxq_stop(priv);
6282
6283 spin_lock_irqsave(&priv->lock, flags);
6284 if (!iwl_grab_restricted_access(priv)) {
6285 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6286 APMG_CLK_VAL_DMA_CLK_RQT);
6287 iwl_release_restricted_access(priv);
6288 }
6289 spin_unlock_irqrestore(&priv->lock, flags);
6290
6291 udelay(5);
6292
6293 iwl_hw_nic_stop_master(priv);
6294 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6295 iwl_hw_nic_reset(priv);
6296
6297 exit:
6298 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6299
6300 if (priv->ibss_beacon)
6301 dev_kfree_skb(priv->ibss_beacon);
6302 priv->ibss_beacon = NULL;
6303
6304 /* clear out any free frames */
6305 iwl_clear_free_frames(priv);
6306 }
6307
6308 static void iwl_down(struct iwl_priv *priv)
6309 {
6310 mutex_lock(&priv->mutex);
6311 __iwl_down(priv);
6312 mutex_unlock(&priv->mutex);
6313 }
6314
6315 #define MAX_HW_RESTARTS 5
6316
6317 static int __iwl_up(struct iwl_priv *priv)
6318 {
6319 DECLARE_MAC_BUF(mac);
6320 int rc, i;
6321
6322 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6323 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6324 return -EIO;
6325 }
6326
6327 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6328 IWL_WARNING("Radio disabled by SW RF kill (module "
6329 "parameter)\n");
6330 return 0;
6331 }
6332
6333 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6334
6335 rc = iwl_hw_nic_init(priv);
6336 if (rc) {
6337 IWL_ERROR("Unable to int nic\n");
6338 return rc;
6339 }
6340
6341 /* make sure rfkill handshake bits are cleared */
6342 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6343 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6344 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6345
6346 /* clear (again), then enable host interrupts */
6347 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6348 iwl_enable_interrupts(priv);
6349
6350 /* really make sure rfkill handshake bits are cleared */
6351 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6352 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6353
6354 /* Copy original ucode data image from disk into backup cache.
6355 * This will be used to initialize the on-board processor's
6356 * data SRAM for a clean start when the runtime program first loads. */
6357 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6358 priv->ucode_data.len);
6359
6360 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6361
6362 iwl_clear_stations_table(priv);
6363
6364 /* load bootstrap state machine,
6365 * load bootstrap program into processor's memory,
6366 * prepare to load the "initialize" uCode */
6367 rc = iwl_load_bsm(priv);
6368
6369 if (rc) {
6370 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6371 continue;
6372 }
6373
6374 /* start card; "initialize" will load runtime ucode */
6375 iwl_nic_start(priv);
6376
6377 /* MAC Address location in EEPROM same for 3945/4965 */
6378 get_eeprom_mac(priv, priv->mac_addr);
6379 IWL_DEBUG_INFO("MAC address: %s\n",
6380 print_mac(mac, priv->mac_addr));
6381
6382 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6383
6384 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6385
6386 return 0;
6387 }
6388
6389 set_bit(STATUS_EXIT_PENDING, &priv->status);
6390 __iwl_down(priv);
6391
6392 /* tried to restart and config the device for as long as our
6393 * patience could withstand */
6394 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6395 return -EIO;
6396 }
6397
6398
6399 /*****************************************************************************
6400 *
6401 * Workqueue callbacks
6402 *
6403 *****************************************************************************/
6404
6405 static void iwl_bg_init_alive_start(struct work_struct *data)
6406 {
6407 struct iwl_priv *priv =
6408 container_of(data, struct iwl_priv, init_alive_start.work);
6409
6410 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6411 return;
6412
6413 mutex_lock(&priv->mutex);
6414 iwl_init_alive_start(priv);
6415 mutex_unlock(&priv->mutex);
6416 }
6417
6418 static void iwl_bg_alive_start(struct work_struct *data)
6419 {
6420 struct iwl_priv *priv =
6421 container_of(data, struct iwl_priv, alive_start.work);
6422
6423 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6424 return;
6425
6426 mutex_lock(&priv->mutex);
6427 iwl_alive_start(priv);
6428 mutex_unlock(&priv->mutex);
6429 }
6430
6431 static void iwl_bg_rf_kill(struct work_struct *work)
6432 {
6433 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6434
6435 wake_up_interruptible(&priv->wait_command_queue);
6436
6437 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6438 return;
6439
6440 mutex_lock(&priv->mutex);
6441
6442 if (!iwl_is_rfkill(priv)) {
6443 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6444 "HW and/or SW RF Kill no longer active, restarting "
6445 "device\n");
6446 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6447 queue_work(priv->workqueue, &priv->restart);
6448 } else {
6449
6450 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6451 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6452 "disabled by SW switch\n");
6453 else
6454 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6455 "Kill switch must be turned off for "
6456 "wireless networking to work.\n");
6457 }
6458 mutex_unlock(&priv->mutex);
6459 }
6460
6461 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6462
6463 static void iwl_bg_scan_check(struct work_struct *data)
6464 {
6465 struct iwl_priv *priv =
6466 container_of(data, struct iwl_priv, scan_check.work);
6467
6468 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6469 return;
6470
6471 mutex_lock(&priv->mutex);
6472 if (test_bit(STATUS_SCANNING, &priv->status) ||
6473 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6474 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6475 "Scan completion watchdog resetting adapter (%dms)\n",
6476 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6477 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6478 queue_work(priv->workqueue, &priv->restart);
6479 }
6480 mutex_unlock(&priv->mutex);
6481 }
6482
6483 static void iwl_bg_request_scan(struct work_struct *data)
6484 {
6485 struct iwl_priv *priv =
6486 container_of(data, struct iwl_priv, request_scan);
6487 struct iwl_host_cmd cmd = {
6488 .id = REPLY_SCAN_CMD,
6489 .len = sizeof(struct iwl_scan_cmd),
6490 .meta.flags = CMD_SIZE_HUGE,
6491 };
6492 int rc = 0;
6493 struct iwl_scan_cmd *scan;
6494 struct ieee80211_conf *conf = NULL;
6495 u8 direct_mask;
6496 int phymode;
6497
6498 conf = ieee80211_get_hw_conf(priv->hw);
6499
6500 mutex_lock(&priv->mutex);
6501
6502 if (!iwl_is_ready(priv)) {
6503 IWL_WARNING("request scan called when driver not ready.\n");
6504 goto done;
6505 }
6506
6507 /* Make sure the scan wasn't cancelled before this queued work
6508 * was given the chance to run... */
6509 if (!test_bit(STATUS_SCANNING, &priv->status))
6510 goto done;
6511
6512 /* This should never be called or scheduled if there is currently
6513 * a scan active in the hardware. */
6514 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6515 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6516 "Ignoring second request.\n");
6517 rc = -EIO;
6518 goto done;
6519 }
6520
6521 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6522 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6523 goto done;
6524 }
6525
6526 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6527 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6528 goto done;
6529 }
6530
6531 if (iwl_is_rfkill(priv)) {
6532 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6533 goto done;
6534 }
6535
6536 if (!test_bit(STATUS_READY, &priv->status)) {
6537 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6538 goto done;
6539 }
6540
6541 if (!priv->scan_bands) {
6542 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6543 goto done;
6544 }
6545
6546 if (!priv->scan) {
6547 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6548 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6549 if (!priv->scan) {
6550 rc = -ENOMEM;
6551 goto done;
6552 }
6553 }
6554 scan = priv->scan;
6555 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6556
6557 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6558 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6559
6560 if (iwl_is_associated(priv)) {
6561 u16 interval = 0;
6562 u32 extra;
6563 u32 suspend_time = 100;
6564 u32 scan_suspend_time = 100;
6565 unsigned long flags;
6566
6567 IWL_DEBUG_INFO("Scanning while associated...\n");
6568
6569 spin_lock_irqsave(&priv->lock, flags);
6570 interval = priv->beacon_int;
6571 spin_unlock_irqrestore(&priv->lock, flags);
6572
6573 scan->suspend_time = 0;
6574 scan->max_out_time = cpu_to_le32(600 * 1024);
6575 if (!interval)
6576 interval = suspend_time;
6577 /*
6578 * suspend time format:
6579 * 0-19: beacon interval in usec (time before exec.)
6580 * 20-23: 0
6581 * 24-31: number of beacons (suspend between channels)
6582 */
6583
6584 extra = (suspend_time / interval) << 24;
6585 scan_suspend_time = 0xFF0FFFFF &
6586 (extra | ((suspend_time % interval) * 1024));
6587
6588 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6589 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6590 scan_suspend_time, interval);
6591 }
6592
6593 /* We should add the ability for user to lock to PASSIVE ONLY */
6594 if (priv->one_direct_scan) {
6595 IWL_DEBUG_SCAN
6596 ("Kicking off one direct scan for '%s'\n",
6597 iwl_escape_essid(priv->direct_ssid,
6598 priv->direct_ssid_len));
6599 scan->direct_scan[0].id = WLAN_EID_SSID;
6600 scan->direct_scan[0].len = priv->direct_ssid_len;
6601 memcpy(scan->direct_scan[0].ssid,
6602 priv->direct_ssid, priv->direct_ssid_len);
6603 direct_mask = 1;
6604 } else if (!iwl_is_associated(priv)) {
6605 scan->direct_scan[0].id = WLAN_EID_SSID;
6606 scan->direct_scan[0].len = priv->essid_len;
6607 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6608 direct_mask = 1;
6609 } else
6610 direct_mask = 0;
6611
6612 /* We don't build a direct scan probe request; the uCode will do
6613 * that based on the direct_mask added to each channel entry */
6614 scan->tx_cmd.len = cpu_to_le16(
6615 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6616 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6617 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6618 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6619 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6620
6621 /* flags + rate selection */
6622
6623 switch (priv->scan_bands) {
6624 case 2:
6625 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6626 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6627 scan->good_CRC_th = 0;
6628 phymode = MODE_IEEE80211G;
6629 break;
6630
6631 case 1:
6632 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6633 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6634 phymode = MODE_IEEE80211A;
6635 break;
6636
6637 default:
6638 IWL_WARNING("Invalid scan band count\n");
6639 goto done;
6640 }
6641
6642 /* select Rx antennas */
6643 scan->flags |= iwl3945_get_antenna_flags(priv);
6644
6645 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6646 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6647
6648 if (direct_mask)
6649 IWL_DEBUG_SCAN
6650 ("Initiating direct scan for %s.\n",
6651 iwl_escape_essid(priv->essid, priv->essid_len));
6652 else
6653 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6654
6655 scan->channel_count =
6656 iwl_get_channels_for_scan(
6657 priv, phymode, 1, /* active */
6658 direct_mask,
6659 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6660
6661 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6662 scan->channel_count * sizeof(struct iwl_scan_channel);
6663 cmd.data = scan;
6664 scan->len = cpu_to_le16(cmd.len);
6665
6666 set_bit(STATUS_SCAN_HW, &priv->status);
6667 rc = iwl_send_cmd_sync(priv, &cmd);
6668 if (rc)
6669 goto done;
6670
6671 queue_delayed_work(priv->workqueue, &priv->scan_check,
6672 IWL_SCAN_CHECK_WATCHDOG);
6673
6674 mutex_unlock(&priv->mutex);
6675 return;
6676
6677 done:
6678 /* inform mac80211 sacn aborted */
6679 queue_work(priv->workqueue, &priv->scan_completed);
6680 mutex_unlock(&priv->mutex);
6681 }
6682
6683 static void iwl_bg_up(struct work_struct *data)
6684 {
6685 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6686
6687 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6688 return;
6689
6690 mutex_lock(&priv->mutex);
6691 __iwl_up(priv);
6692 mutex_unlock(&priv->mutex);
6693 }
6694
6695 static void iwl_bg_restart(struct work_struct *data)
6696 {
6697 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6698
6699 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6700 return;
6701
6702 iwl_down(priv);
6703 queue_work(priv->workqueue, &priv->up);
6704 }
6705
6706 static void iwl_bg_rx_replenish(struct work_struct *data)
6707 {
6708 struct iwl_priv *priv =
6709 container_of(data, struct iwl_priv, rx_replenish);
6710
6711 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6712 return;
6713
6714 mutex_lock(&priv->mutex);
6715 iwl_rx_replenish(priv);
6716 mutex_unlock(&priv->mutex);
6717 }
6718
6719 static void iwl_bg_post_associate(struct work_struct *data)
6720 {
6721 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6722 post_associate.work);
6723
6724 int rc = 0;
6725 struct ieee80211_conf *conf = NULL;
6726 DECLARE_MAC_BUF(mac);
6727
6728 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6729 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6730 return;
6731 }
6732
6733
6734 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6735 priv->assoc_id,
6736 print_mac(mac, priv->active_rxon.bssid_addr));
6737
6738 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6739 return;
6740
6741 mutex_lock(&priv->mutex);
6742
6743 conf = ieee80211_get_hw_conf(priv->hw);
6744
6745 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6746 iwl_commit_rxon(priv);
6747
6748 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6749 iwl_setup_rxon_timing(priv);
6750 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6751 sizeof(priv->rxon_timing), &priv->rxon_timing);
6752 if (rc)
6753 IWL_WARNING("REPLY_RXON_TIMING failed - "
6754 "Attempting to continue.\n");
6755
6756 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6757
6758 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6759
6760 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6761 priv->assoc_id, priv->beacon_int);
6762
6763 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6764 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6765 else
6766 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6767
6768 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6769 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6770 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6771 else
6772 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6773
6774 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6775 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6776
6777 }
6778
6779 iwl_commit_rxon(priv);
6780
6781 switch (priv->iw_mode) {
6782 case IEEE80211_IF_TYPE_STA:
6783 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6784 break;
6785
6786 case IEEE80211_IF_TYPE_IBSS:
6787
6788 /* clear out the station table */
6789 iwl_clear_stations_table(priv);
6790
6791 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6792 iwl_add_station(priv, priv->bssid, 0, 0);
6793 iwl3945_sync_sta(priv, IWL_STA_ID,
6794 (priv->phymode == MODE_IEEE80211A)?
6795 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6796 CMD_ASYNC);
6797 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6798 iwl_send_beacon_cmd(priv);
6799
6800 break;
6801
6802 default:
6803 IWL_ERROR("%s Should not be called in %d mode\n",
6804 __FUNCTION__, priv->iw_mode);
6805 break;
6806 }
6807
6808 iwl_sequence_reset(priv);
6809
6810 #ifdef CONFIG_IWLWIFI_QOS
6811 iwl_activate_qos(priv, 0);
6812 #endif /* CONFIG_IWLWIFI_QOS */
6813 mutex_unlock(&priv->mutex);
6814 }
6815
6816 static void iwl_bg_abort_scan(struct work_struct *work)
6817 {
6818 struct iwl_priv *priv = container_of(work, struct iwl_priv,
6819 abort_scan);
6820
6821 if (!iwl_is_ready(priv))
6822 return;
6823
6824 mutex_lock(&priv->mutex);
6825
6826 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6827 iwl_send_scan_abort(priv);
6828
6829 mutex_unlock(&priv->mutex);
6830 }
6831
6832 static void iwl_bg_scan_completed(struct work_struct *work)
6833 {
6834 struct iwl_priv *priv =
6835 container_of(work, struct iwl_priv, scan_completed);
6836
6837 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6838
6839 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6840 return;
6841
6842 ieee80211_scan_completed(priv->hw);
6843
6844 /* Since setting the TXPOWER may have been deferred while
6845 * performing the scan, fire one off */
6846 mutex_lock(&priv->mutex);
6847 iwl_hw_reg_send_txpower(priv);
6848 mutex_unlock(&priv->mutex);
6849 }
6850
6851 /*****************************************************************************
6852 *
6853 * mac80211 entry point functions
6854 *
6855 *****************************************************************************/
6856
6857 static int iwl_mac_start(struct ieee80211_hw *hw)
6858 {
6859 struct iwl_priv *priv = hw->priv;
6860
6861 IWL_DEBUG_MAC80211("enter\n");
6862
6863 /* we should be verifying the device is ready to be opened */
6864 mutex_lock(&priv->mutex);
6865
6866 priv->is_open = 1;
6867
6868 if (!iwl_is_rfkill(priv))
6869 ieee80211_start_queues(priv->hw);
6870
6871 mutex_unlock(&priv->mutex);
6872 IWL_DEBUG_MAC80211("leave\n");
6873 return 0;
6874 }
6875
6876 static void iwl_mac_stop(struct ieee80211_hw *hw)
6877 {
6878 struct iwl_priv *priv = hw->priv;
6879
6880 IWL_DEBUG_MAC80211("enter\n");
6881 priv->is_open = 0;
6882 /*netif_stop_queue(dev); */
6883 flush_workqueue(priv->workqueue);
6884 IWL_DEBUG_MAC80211("leave\n");
6885 }
6886
6887 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6888 struct ieee80211_tx_control *ctl)
6889 {
6890 struct iwl_priv *priv = hw->priv;
6891
6892 IWL_DEBUG_MAC80211("enter\n");
6893
6894 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6895 IWL_DEBUG_MAC80211("leave - monitor\n");
6896 return -1;
6897 }
6898
6899 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6900 ctl->tx_rate);
6901
6902 if (iwl_tx_skb(priv, skb, ctl))
6903 dev_kfree_skb_any(skb);
6904
6905 IWL_DEBUG_MAC80211("leave\n");
6906 return 0;
6907 }
6908
6909 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6910 struct ieee80211_if_init_conf *conf)
6911 {
6912 struct iwl_priv *priv = hw->priv;
6913 unsigned long flags;
6914 DECLARE_MAC_BUF(mac);
6915
6916 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6917 if (conf->mac_addr)
6918 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6919 print_mac(mac, conf->mac_addr));
6920
6921 if (priv->interface_id) {
6922 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6923 return 0;
6924 }
6925
6926 spin_lock_irqsave(&priv->lock, flags);
6927 priv->interface_id = conf->if_id;
6928
6929 spin_unlock_irqrestore(&priv->lock, flags);
6930
6931 mutex_lock(&priv->mutex);
6932 iwl_set_mode(priv, conf->type);
6933
6934 IWL_DEBUG_MAC80211("leave\n");
6935 mutex_unlock(&priv->mutex);
6936
6937 return 0;
6938 }
6939
6940 /**
6941 * iwl_mac_config - mac80211 config callback
6942 *
6943 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6944 * be set inappropriately and the driver currently sets the hardware up to
6945 * use it whenever needed.
6946 */
6947 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6948 {
6949 struct iwl_priv *priv = hw->priv;
6950 const struct iwl_channel_info *ch_info;
6951 unsigned long flags;
6952
6953 mutex_lock(&priv->mutex);
6954 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6955
6956 if (!iwl_is_ready(priv)) {
6957 IWL_DEBUG_MAC80211("leave - not ready\n");
6958 mutex_unlock(&priv->mutex);
6959 return -EIO;
6960 }
6961
6962 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6963 * what is exposed through include/ declrations */
6964 if (unlikely(!iwl_param_disable_hw_scan &&
6965 test_bit(STATUS_SCANNING, &priv->status))) {
6966 IWL_DEBUG_MAC80211("leave - scanning\n");
6967 mutex_unlock(&priv->mutex);
6968 return 0;
6969 }
6970
6971 spin_lock_irqsave(&priv->lock, flags);
6972
6973 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6974 if (!is_channel_valid(ch_info)) {
6975 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6976 conf->channel, conf->phymode);
6977 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6978 spin_unlock_irqrestore(&priv->lock, flags);
6979 mutex_unlock(&priv->mutex);
6980 return -EINVAL;
6981 }
6982
6983 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6984
6985 iwl_set_flags_for_phymode(priv, conf->phymode);
6986
6987 /* The list of supported rates and rate mask can be different
6988 * for each phymode; since the phymode may have changed, reset
6989 * the rate mask to what mac80211 lists */
6990 iwl_set_rate(priv);
6991
6992 spin_unlock_irqrestore(&priv->lock, flags);
6993
6994 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6995 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6996 iwl_hw_channel_switch(priv, conf->channel);
6997 mutex_unlock(&priv->mutex);
6998 return 0;
6999 }
7000 #endif
7001
7002 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7003
7004 if (!conf->radio_enabled) {
7005 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7006 mutex_unlock(&priv->mutex);
7007 return 0;
7008 }
7009
7010 if (iwl_is_rfkill(priv)) {
7011 IWL_DEBUG_MAC80211("leave - RF kill\n");
7012 mutex_unlock(&priv->mutex);
7013 return -EIO;
7014 }
7015
7016 iwl_set_rate(priv);
7017
7018 if (memcmp(&priv->active_rxon,
7019 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7020 iwl_commit_rxon(priv);
7021 else
7022 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7023
7024 IWL_DEBUG_MAC80211("leave\n");
7025
7026 mutex_unlock(&priv->mutex);
7027
7028 return 0;
7029 }
7030
7031 static void iwl_config_ap(struct iwl_priv *priv)
7032 {
7033 int rc = 0;
7034
7035 if (priv->status & STATUS_EXIT_PENDING)
7036 return;
7037
7038 /* The following should be done only at AP bring up */
7039 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7040
7041 /* RXON - unassoc (to set timing command) */
7042 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7043 iwl_commit_rxon(priv);
7044
7045 /* RXON Timing */
7046 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7047 iwl_setup_rxon_timing(priv);
7048 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7049 sizeof(priv->rxon_timing), &priv->rxon_timing);
7050 if (rc)
7051 IWL_WARNING("REPLY_RXON_TIMING failed - "
7052 "Attempting to continue.\n");
7053
7054 /* FIXME: what should be the assoc_id for AP? */
7055 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7056 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7057 priv->staging_rxon.flags |=
7058 RXON_FLG_SHORT_PREAMBLE_MSK;
7059 else
7060 priv->staging_rxon.flags &=
7061 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7062
7063 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7064 if (priv->assoc_capability &
7065 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7066 priv->staging_rxon.flags |=
7067 RXON_FLG_SHORT_SLOT_MSK;
7068 else
7069 priv->staging_rxon.flags &=
7070 ~RXON_FLG_SHORT_SLOT_MSK;
7071
7072 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7073 priv->staging_rxon.flags &=
7074 ~RXON_FLG_SHORT_SLOT_MSK;
7075 }
7076 /* restore RXON assoc */
7077 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7078 iwl_commit_rxon(priv);
7079 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7080 }
7081 iwl_send_beacon_cmd(priv);
7082
7083 /* FIXME - we need to add code here to detect a totally new
7084 * configuration, reset the AP, unassoc, rxon timing, assoc,
7085 * clear sta table, add BCAST sta... */
7086 }
7087
7088 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7089 struct ieee80211_if_conf *conf)
7090 {
7091 struct iwl_priv *priv = hw->priv;
7092 DECLARE_MAC_BUF(mac);
7093 unsigned long flags;
7094 int rc;
7095
7096 if (conf == NULL)
7097 return -EIO;
7098
7099 /* XXX: this MUST use conf->mac_addr */
7100
7101 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7102 (!conf->beacon || !conf->ssid_len)) {
7103 IWL_DEBUG_MAC80211
7104 ("Leaving in AP mode because HostAPD is not ready.\n");
7105 return 0;
7106 }
7107
7108 mutex_lock(&priv->mutex);
7109
7110 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7111 if (conf->bssid)
7112 IWL_DEBUG_MAC80211("bssid: %s\n",
7113 print_mac(mac, conf->bssid));
7114
7115 /*
7116 * very dubious code was here; the probe filtering flag is never set:
7117 *
7118 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7119 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7120 */
7121 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7122 IWL_DEBUG_MAC80211("leave - scanning\n");
7123 mutex_unlock(&priv->mutex);
7124 return 0;
7125 }
7126
7127 if (priv->interface_id != if_id) {
7128 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7129 mutex_unlock(&priv->mutex);
7130 return 0;
7131 }
7132
7133 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7134 if (!conf->bssid) {
7135 conf->bssid = priv->mac_addr;
7136 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7137 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7138 print_mac(mac, conf->bssid));
7139 }
7140 if (priv->ibss_beacon)
7141 dev_kfree_skb(priv->ibss_beacon);
7142
7143 priv->ibss_beacon = conf->beacon;
7144 }
7145
7146 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7147 !is_multicast_ether_addr(conf->bssid)) {
7148 /* If there is currently a HW scan going on in the background
7149 * then we need to cancel it else the RXON below will fail. */
7150 if (iwl_scan_cancel_timeout(priv, 100)) {
7151 IWL_WARNING("Aborted scan still in progress "
7152 "after 100ms\n");
7153 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7154 mutex_unlock(&priv->mutex);
7155 return -EAGAIN;
7156 }
7157 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7158
7159 /* TODO: Audit driver for usage of these members and see
7160 * if mac80211 deprecates them (priv->bssid looks like it
7161 * shouldn't be there, but I haven't scanned the IBSS code
7162 * to verify) - jpk */
7163 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7164
7165 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7166 iwl_config_ap(priv);
7167 else {
7168 priv->staging_rxon.filter_flags |=
7169 RXON_FILTER_ASSOC_MSK;
7170 rc = iwl_commit_rxon(priv);
7171 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7172 iwl_add_station(priv,
7173 priv->active_rxon.bssid_addr, 1, 0);
7174 }
7175
7176 } else {
7177 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7178 iwl_commit_rxon(priv);
7179 }
7180
7181 spin_lock_irqsave(&priv->lock, flags);
7182 if (!conf->ssid_len)
7183 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7184 else
7185 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7186
7187 priv->essid_len = conf->ssid_len;
7188 spin_unlock_irqrestore(&priv->lock, flags);
7189
7190 IWL_DEBUG_MAC80211("leave\n");
7191 mutex_unlock(&priv->mutex);
7192
7193 return 0;
7194 }
7195
7196 static void iwl_configure_filter(struct ieee80211_hw *hw,
7197 unsigned int changed_flags,
7198 unsigned int *total_flags,
7199 int mc_count, struct dev_addr_list *mc_list)
7200 {
7201 /*
7202 * XXX: dummy
7203 * see also iwl_connection_init_rx_config
7204 */
7205 *total_flags = 0;
7206 }
7207
7208 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7209 struct ieee80211_if_init_conf *conf)
7210 {
7211 struct iwl_priv *priv = hw->priv;
7212
7213 IWL_DEBUG_MAC80211("enter\n");
7214
7215 mutex_lock(&priv->mutex);
7216 if (priv->interface_id == conf->if_id) {
7217 priv->interface_id = 0;
7218 memset(priv->bssid, 0, ETH_ALEN);
7219 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7220 priv->essid_len = 0;
7221 }
7222 mutex_unlock(&priv->mutex);
7223
7224 IWL_DEBUG_MAC80211("leave\n");
7225
7226 }
7227
7228 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7229 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7230 {
7231 int rc = 0;
7232 unsigned long flags;
7233 struct iwl_priv *priv = hw->priv;
7234
7235 IWL_DEBUG_MAC80211("enter\n");
7236
7237 spin_lock_irqsave(&priv->lock, flags);
7238
7239 if (!iwl_is_ready_rf(priv)) {
7240 rc = -EIO;
7241 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7242 goto out_unlock;
7243 }
7244
7245 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7246 rc = -EIO;
7247 IWL_ERROR("ERROR: APs don't scan\n");
7248 goto out_unlock;
7249 }
7250
7251 /* if we just finished scan ask for delay */
7252 if (priv->last_scan_jiffies &&
7253 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7254 jiffies)) {
7255 rc = -EAGAIN;
7256 goto out_unlock;
7257 }
7258 if (len) {
7259 IWL_DEBUG_SCAN("direct scan for "
7260 "%s [%d]\n ",
7261 iwl_escape_essid(ssid, len), (int)len);
7262
7263 priv->one_direct_scan = 1;
7264 priv->direct_ssid_len = (u8)
7265 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7266 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7267 }
7268
7269 rc = iwl_scan_initiate(priv);
7270
7271 IWL_DEBUG_MAC80211("leave\n");
7272
7273 out_unlock:
7274 spin_unlock_irqrestore(&priv->lock, flags);
7275
7276 return rc;
7277 }
7278
7279 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7280 const u8 *local_addr, const u8 *addr,
7281 struct ieee80211_key_conf *key)
7282 {
7283 struct iwl_priv *priv = hw->priv;
7284 int rc = 0;
7285 u8 sta_id;
7286
7287 IWL_DEBUG_MAC80211("enter\n");
7288
7289 if (!iwl_param_hwcrypto) {
7290 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7291 return -EOPNOTSUPP;
7292 }
7293
7294 if (is_zero_ether_addr(addr))
7295 /* only support pairwise keys */
7296 return -EOPNOTSUPP;
7297
7298 sta_id = iwl_hw_find_station(priv, addr);
7299 if (sta_id == IWL_INVALID_STATION) {
7300 DECLARE_MAC_BUF(mac);
7301
7302 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7303 print_mac(mac, addr));
7304 return -EINVAL;
7305 }
7306
7307 mutex_lock(&priv->mutex);
7308
7309 switch (cmd) {
7310 case SET_KEY:
7311 rc = iwl_update_sta_key_info(priv, key, sta_id);
7312 if (!rc) {
7313 iwl_set_rxon_hwcrypto(priv, 1);
7314 iwl_commit_rxon(priv);
7315 key->hw_key_idx = sta_id;
7316 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7317 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7318 }
7319 break;
7320 case DISABLE_KEY:
7321 rc = iwl_clear_sta_key_info(priv, sta_id);
7322 if (!rc) {
7323 iwl_set_rxon_hwcrypto(priv, 0);
7324 iwl_commit_rxon(priv);
7325 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7326 }
7327 break;
7328 default:
7329 rc = -EINVAL;
7330 }
7331
7332 IWL_DEBUG_MAC80211("leave\n");
7333 mutex_unlock(&priv->mutex);
7334
7335 return rc;
7336 }
7337
7338 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7339 const struct ieee80211_tx_queue_params *params)
7340 {
7341 struct iwl_priv *priv = hw->priv;
7342 #ifdef CONFIG_IWLWIFI_QOS
7343 unsigned long flags;
7344 int q;
7345 #endif /* CONFIG_IWL_QOS */
7346
7347 IWL_DEBUG_MAC80211("enter\n");
7348
7349 if (!iwl_is_ready_rf(priv)) {
7350 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7351 return -EIO;
7352 }
7353
7354 if (queue >= AC_NUM) {
7355 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7356 return 0;
7357 }
7358
7359 #ifdef CONFIG_IWLWIFI_QOS
7360 if (!priv->qos_data.qos_enable) {
7361 priv->qos_data.qos_active = 0;
7362 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7363 return 0;
7364 }
7365 q = AC_NUM - 1 - queue;
7366
7367 spin_lock_irqsave(&priv->lock, flags);
7368
7369 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7370 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7371 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7372 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7373 cpu_to_le16((params->burst_time * 100));
7374
7375 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7376 priv->qos_data.qos_active = 1;
7377
7378 spin_unlock_irqrestore(&priv->lock, flags);
7379
7380 mutex_lock(&priv->mutex);
7381 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7382 iwl_activate_qos(priv, 1);
7383 else if (priv->assoc_id && iwl_is_associated(priv))
7384 iwl_activate_qos(priv, 0);
7385
7386 mutex_unlock(&priv->mutex);
7387
7388 #endif /*CONFIG_IWLWIFI_QOS */
7389
7390 IWL_DEBUG_MAC80211("leave\n");
7391 return 0;
7392 }
7393
7394 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7395 struct ieee80211_tx_queue_stats *stats)
7396 {
7397 struct iwl_priv *priv = hw->priv;
7398 int i, avail;
7399 struct iwl_tx_queue *txq;
7400 struct iwl_queue *q;
7401 unsigned long flags;
7402
7403 IWL_DEBUG_MAC80211("enter\n");
7404
7405 if (!iwl_is_ready_rf(priv)) {
7406 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7407 return -EIO;
7408 }
7409
7410 spin_lock_irqsave(&priv->lock, flags);
7411
7412 for (i = 0; i < AC_NUM; i++) {
7413 txq = &priv->txq[i];
7414 q = &txq->q;
7415 avail = iwl_queue_space(q);
7416
7417 stats->data[i].len = q->n_window - avail;
7418 stats->data[i].limit = q->n_window - q->high_mark;
7419 stats->data[i].count = q->n_window;
7420
7421 }
7422 spin_unlock_irqrestore(&priv->lock, flags);
7423
7424 IWL_DEBUG_MAC80211("leave\n");
7425
7426 return 0;
7427 }
7428
7429 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7430 struct ieee80211_low_level_stats *stats)
7431 {
7432 IWL_DEBUG_MAC80211("enter\n");
7433 IWL_DEBUG_MAC80211("leave\n");
7434
7435 return 0;
7436 }
7437
7438 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7439 {
7440 IWL_DEBUG_MAC80211("enter\n");
7441 IWL_DEBUG_MAC80211("leave\n");
7442
7443 return 0;
7444 }
7445
7446 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7447 {
7448 struct iwl_priv *priv = hw->priv;
7449 unsigned long flags;
7450
7451 mutex_lock(&priv->mutex);
7452 IWL_DEBUG_MAC80211("enter\n");
7453
7454 #ifdef CONFIG_IWLWIFI_QOS
7455 iwl_reset_qos(priv);
7456 #endif
7457 cancel_delayed_work(&priv->post_associate);
7458
7459 spin_lock_irqsave(&priv->lock, flags);
7460 priv->assoc_id = 0;
7461 priv->assoc_capability = 0;
7462 priv->call_post_assoc_from_beacon = 0;
7463
7464 /* new association get rid of ibss beacon skb */
7465 if (priv->ibss_beacon)
7466 dev_kfree_skb(priv->ibss_beacon);
7467
7468 priv->ibss_beacon = NULL;
7469
7470 priv->beacon_int = priv->hw->conf.beacon_int;
7471 priv->timestamp1 = 0;
7472 priv->timestamp0 = 0;
7473 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7474 priv->beacon_int = 0;
7475
7476 spin_unlock_irqrestore(&priv->lock, flags);
7477
7478 /* Per mac80211.h: This is only used in IBSS mode... */
7479 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7480 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7481 mutex_unlock(&priv->mutex);
7482 return;
7483 }
7484
7485 if (!iwl_is_ready_rf(priv)) {
7486 IWL_DEBUG_MAC80211("leave - not ready\n");
7487 mutex_unlock(&priv->mutex);
7488 return;
7489 }
7490
7491 priv->only_active_channel = 0;
7492
7493 iwl_set_rate(priv);
7494
7495 mutex_unlock(&priv->mutex);
7496
7497 IWL_DEBUG_MAC80211("leave\n");
7498
7499 }
7500
7501 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7502 struct ieee80211_tx_control *control)
7503 {
7504 struct iwl_priv *priv = hw->priv;
7505 unsigned long flags;
7506
7507 mutex_lock(&priv->mutex);
7508 IWL_DEBUG_MAC80211("enter\n");
7509
7510 if (!iwl_is_ready_rf(priv)) {
7511 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7512 mutex_unlock(&priv->mutex);
7513 return -EIO;
7514 }
7515
7516 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7517 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7518 mutex_unlock(&priv->mutex);
7519 return -EIO;
7520 }
7521
7522 spin_lock_irqsave(&priv->lock, flags);
7523
7524 if (priv->ibss_beacon)
7525 dev_kfree_skb(priv->ibss_beacon);
7526
7527 priv->ibss_beacon = skb;
7528
7529 priv->assoc_id = 0;
7530
7531 IWL_DEBUG_MAC80211("leave\n");
7532 spin_unlock_irqrestore(&priv->lock, flags);
7533
7534 #ifdef CONFIG_IWLWIFI_QOS
7535 iwl_reset_qos(priv);
7536 #endif
7537
7538 queue_work(priv->workqueue, &priv->post_associate.work);
7539
7540 mutex_unlock(&priv->mutex);
7541
7542 return 0;
7543 }
7544
7545 /*****************************************************************************
7546 *
7547 * sysfs attributes
7548 *
7549 *****************************************************************************/
7550
7551 #ifdef CONFIG_IWLWIFI_DEBUG
7552
7553 /*
7554 * The following adds a new attribute to the sysfs representation
7555 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7556 * used for controlling the debug level.
7557 *
7558 * See the level definitions in iwl for details.
7559 */
7560
7561 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7562 {
7563 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7564 }
7565 static ssize_t store_debug_level(struct device_driver *d,
7566 const char *buf, size_t count)
7567 {
7568 char *p = (char *)buf;
7569 u32 val;
7570
7571 val = simple_strtoul(p, &p, 0);
7572 if (p == buf)
7573 printk(KERN_INFO DRV_NAME
7574 ": %s is not in hex or decimal form.\n", buf);
7575 else
7576 iwl_debug_level = val;
7577
7578 return strnlen(buf, count);
7579 }
7580
7581 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7582 show_debug_level, store_debug_level);
7583
7584 #endif /* CONFIG_IWLWIFI_DEBUG */
7585
7586 static ssize_t show_rf_kill(struct device *d,
7587 struct device_attribute *attr, char *buf)
7588 {
7589 /*
7590 * 0 - RF kill not enabled
7591 * 1 - SW based RF kill active (sysfs)
7592 * 2 - HW based RF kill active
7593 * 3 - Both HW and SW based RF kill active
7594 */
7595 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7596 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7597 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7598
7599 return sprintf(buf, "%i\n", val);
7600 }
7601
7602 static ssize_t store_rf_kill(struct device *d,
7603 struct device_attribute *attr,
7604 const char *buf, size_t count)
7605 {
7606 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7607
7608 mutex_lock(&priv->mutex);
7609 iwl_radio_kill_sw(priv, buf[0] == '1');
7610 mutex_unlock(&priv->mutex);
7611
7612 return count;
7613 }
7614
7615 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7616
7617 static ssize_t show_temperature(struct device *d,
7618 struct device_attribute *attr, char *buf)
7619 {
7620 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7621
7622 if (!iwl_is_alive(priv))
7623 return -EAGAIN;
7624
7625 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7626 }
7627
7628 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7629
7630 static ssize_t show_rs_window(struct device *d,
7631 struct device_attribute *attr,
7632 char *buf)
7633 {
7634 struct iwl_priv *priv = d->driver_data;
7635 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7636 }
7637 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7638
7639 static ssize_t show_tx_power(struct device *d,
7640 struct device_attribute *attr, char *buf)
7641 {
7642 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7643 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7644 }
7645
7646 static ssize_t store_tx_power(struct device *d,
7647 struct device_attribute *attr,
7648 const char *buf, size_t count)
7649 {
7650 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7651 char *p = (char *)buf;
7652 u32 val;
7653
7654 val = simple_strtoul(p, &p, 10);
7655 if (p == buf)
7656 printk(KERN_INFO DRV_NAME
7657 ": %s is not in decimal form.\n", buf);
7658 else
7659 iwl_hw_reg_set_txpower(priv, val);
7660
7661 return count;
7662 }
7663
7664 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7665
7666 static ssize_t show_flags(struct device *d,
7667 struct device_attribute *attr, char *buf)
7668 {
7669 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7670
7671 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7672 }
7673
7674 static ssize_t store_flags(struct device *d,
7675 struct device_attribute *attr,
7676 const char *buf, size_t count)
7677 {
7678 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7679 u32 flags = simple_strtoul(buf, NULL, 0);
7680
7681 mutex_lock(&priv->mutex);
7682 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7683 /* Cancel any currently running scans... */
7684 if (iwl_scan_cancel_timeout(priv, 100))
7685 IWL_WARNING("Could not cancel scan.\n");
7686 else {
7687 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7688 flags);
7689 priv->staging_rxon.flags = cpu_to_le32(flags);
7690 iwl_commit_rxon(priv);
7691 }
7692 }
7693 mutex_unlock(&priv->mutex);
7694
7695 return count;
7696 }
7697
7698 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7699
7700 static ssize_t show_filter_flags(struct device *d,
7701 struct device_attribute *attr, char *buf)
7702 {
7703 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7704
7705 return sprintf(buf, "0x%04X\n",
7706 le32_to_cpu(priv->active_rxon.filter_flags));
7707 }
7708
7709 static ssize_t store_filter_flags(struct device *d,
7710 struct device_attribute *attr,
7711 const char *buf, size_t count)
7712 {
7713 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7714 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7715
7716 mutex_lock(&priv->mutex);
7717 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7718 /* Cancel any currently running scans... */
7719 if (iwl_scan_cancel_timeout(priv, 100))
7720 IWL_WARNING("Could not cancel scan.\n");
7721 else {
7722 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7723 "0x%04X\n", filter_flags);
7724 priv->staging_rxon.filter_flags =
7725 cpu_to_le32(filter_flags);
7726 iwl_commit_rxon(priv);
7727 }
7728 }
7729 mutex_unlock(&priv->mutex);
7730
7731 return count;
7732 }
7733
7734 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7735 store_filter_flags);
7736
7737 static ssize_t show_tune(struct device *d,
7738 struct device_attribute *attr, char *buf)
7739 {
7740 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7741
7742 return sprintf(buf, "0x%04X\n",
7743 (priv->phymode << 8) |
7744 le16_to_cpu(priv->active_rxon.channel));
7745 }
7746
7747 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7748
7749 static ssize_t store_tune(struct device *d,
7750 struct device_attribute *attr,
7751 const char *buf, size_t count)
7752 {
7753 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7754 char *p = (char *)buf;
7755 u16 tune = simple_strtoul(p, &p, 0);
7756 u8 phymode = (tune >> 8) & 0xff;
7757 u16 channel = tune & 0xff;
7758
7759 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7760
7761 mutex_lock(&priv->mutex);
7762 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7763 (priv->phymode != phymode)) {
7764 const struct iwl_channel_info *ch_info;
7765
7766 ch_info = iwl_get_channel_info(priv, phymode, channel);
7767 if (!ch_info) {
7768 IWL_WARNING("Requested invalid phymode/channel "
7769 "combination: %d %d\n", phymode, channel);
7770 mutex_unlock(&priv->mutex);
7771 return -EINVAL;
7772 }
7773
7774 /* Cancel any currently running scans... */
7775 if (iwl_scan_cancel_timeout(priv, 100))
7776 IWL_WARNING("Could not cancel scan.\n");
7777 else {
7778 IWL_DEBUG_INFO("Committing phymode and "
7779 "rxon.channel = %d %d\n",
7780 phymode, channel);
7781
7782 iwl_set_rxon_channel(priv, phymode, channel);
7783 iwl_set_flags_for_phymode(priv, phymode);
7784
7785 iwl_set_rate(priv);
7786 iwl_commit_rxon(priv);
7787 }
7788 }
7789 mutex_unlock(&priv->mutex);
7790
7791 return count;
7792 }
7793
7794 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7795
7796 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7797
7798 static ssize_t show_measurement(struct device *d,
7799 struct device_attribute *attr, char *buf)
7800 {
7801 struct iwl_priv *priv = dev_get_drvdata(d);
7802 struct iwl_spectrum_notification measure_report;
7803 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7804 u8 *data = (u8 *) & measure_report;
7805 unsigned long flags;
7806
7807 spin_lock_irqsave(&priv->lock, flags);
7808 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7809 spin_unlock_irqrestore(&priv->lock, flags);
7810 return 0;
7811 }
7812 memcpy(&measure_report, &priv->measure_report, size);
7813 priv->measurement_status = 0;
7814 spin_unlock_irqrestore(&priv->lock, flags);
7815
7816 while (size && (PAGE_SIZE - len)) {
7817 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7818 PAGE_SIZE - len, 1);
7819 len = strlen(buf);
7820 if (PAGE_SIZE - len)
7821 buf[len++] = '\n';
7822
7823 ofs += 16;
7824 size -= min(size, 16U);
7825 }
7826
7827 return len;
7828 }
7829
7830 static ssize_t store_measurement(struct device *d,
7831 struct device_attribute *attr,
7832 const char *buf, size_t count)
7833 {
7834 struct iwl_priv *priv = dev_get_drvdata(d);
7835 struct ieee80211_measurement_params params = {
7836 .channel = le16_to_cpu(priv->active_rxon.channel),
7837 .start_time = cpu_to_le64(priv->last_tsf),
7838 .duration = cpu_to_le16(1),
7839 };
7840 u8 type = IWL_MEASURE_BASIC;
7841 u8 buffer[32];
7842 u8 channel;
7843
7844 if (count) {
7845 char *p = buffer;
7846 strncpy(buffer, buf, min(sizeof(buffer), count));
7847 channel = simple_strtoul(p, NULL, 0);
7848 if (channel)
7849 params.channel = channel;
7850
7851 p = buffer;
7852 while (*p && *p != ' ')
7853 p++;
7854 if (*p)
7855 type = simple_strtoul(p + 1, NULL, 0);
7856 }
7857
7858 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7859 "channel %d (for '%s')\n", type, params.channel, buf);
7860 iwl_get_measurement(priv, &params, type);
7861
7862 return count;
7863 }
7864
7865 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7866 show_measurement, store_measurement);
7867 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7868
7869 static ssize_t show_rate(struct device *d,
7870 struct device_attribute *attr, char *buf)
7871 {
7872 struct iwl_priv *priv = dev_get_drvdata(d);
7873 unsigned long flags;
7874 int i;
7875
7876 spin_lock_irqsave(&priv->sta_lock, flags);
7877 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7878 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7879 else
7880 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7881 spin_unlock_irqrestore(&priv->sta_lock, flags);
7882
7883 i = iwl_rate_index_from_plcp(i);
7884 if (i == -1)
7885 return sprintf(buf, "0\n");
7886
7887 return sprintf(buf, "%d%s\n",
7888 (iwl_rates[i].ieee >> 1),
7889 (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7890 }
7891
7892 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7893
7894 static ssize_t store_retry_rate(struct device *d,
7895 struct device_attribute *attr,
7896 const char *buf, size_t count)
7897 {
7898 struct iwl_priv *priv = dev_get_drvdata(d);
7899
7900 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7901 if (priv->retry_rate <= 0)
7902 priv->retry_rate = 1;
7903
7904 return count;
7905 }
7906
7907 static ssize_t show_retry_rate(struct device *d,
7908 struct device_attribute *attr, char *buf)
7909 {
7910 struct iwl_priv *priv = dev_get_drvdata(d);
7911 return sprintf(buf, "%d", priv->retry_rate);
7912 }
7913
7914 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7915 store_retry_rate);
7916
7917 static ssize_t store_power_level(struct device *d,
7918 struct device_attribute *attr,
7919 const char *buf, size_t count)
7920 {
7921 struct iwl_priv *priv = dev_get_drvdata(d);
7922 int rc;
7923 int mode;
7924
7925 mode = simple_strtoul(buf, NULL, 0);
7926 mutex_lock(&priv->mutex);
7927
7928 if (!iwl_is_ready(priv)) {
7929 rc = -EAGAIN;
7930 goto out;
7931 }
7932
7933 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7934 mode = IWL_POWER_AC;
7935 else
7936 mode |= IWL_POWER_ENABLED;
7937
7938 if (mode != priv->power_mode) {
7939 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7940 if (rc) {
7941 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7942 goto out;
7943 }
7944 priv->power_mode = mode;
7945 }
7946
7947 rc = count;
7948
7949 out:
7950 mutex_unlock(&priv->mutex);
7951 return rc;
7952 }
7953
7954 #define MAX_WX_STRING 80
7955
7956 /* Values are in microsecond */
7957 static const s32 timeout_duration[] = {
7958 350000,
7959 250000,
7960 75000,
7961 37000,
7962 25000,
7963 };
7964 static const s32 period_duration[] = {
7965 400000,
7966 700000,
7967 1000000,
7968 1000000,
7969 1000000
7970 };
7971
7972 static ssize_t show_power_level(struct device *d,
7973 struct device_attribute *attr, char *buf)
7974 {
7975 struct iwl_priv *priv = dev_get_drvdata(d);
7976 int level = IWL_POWER_LEVEL(priv->power_mode);
7977 char *p = buf;
7978
7979 p += sprintf(p, "%d ", level);
7980 switch (level) {
7981 case IWL_POWER_MODE_CAM:
7982 case IWL_POWER_AC:
7983 p += sprintf(p, "(AC)");
7984 break;
7985 case IWL_POWER_BATTERY:
7986 p += sprintf(p, "(BATTERY)");
7987 break;
7988 default:
7989 p += sprintf(p,
7990 "(Timeout %dms, Period %dms)",
7991 timeout_duration[level - 1] / 1000,
7992 period_duration[level - 1] / 1000);
7993 }
7994
7995 if (!(priv->power_mode & IWL_POWER_ENABLED))
7996 p += sprintf(p, " OFF\n");
7997 else
7998 p += sprintf(p, " \n");
7999
8000 return (p - buf + 1);
8001
8002 }
8003
8004 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8005 store_power_level);
8006
8007 static ssize_t show_channels(struct device *d,
8008 struct device_attribute *attr, char *buf)
8009 {
8010 struct iwl_priv *priv = dev_get_drvdata(d);
8011 int len = 0, i;
8012 struct ieee80211_channel *channels = NULL;
8013 const struct ieee80211_hw_mode *hw_mode = NULL;
8014 int count = 0;
8015
8016 if (!iwl_is_ready(priv))
8017 return -EAGAIN;
8018
8019 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8020 if (!hw_mode)
8021 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8022 if (hw_mode) {
8023 channels = hw_mode->channels;
8024 count = hw_mode->num_channels;
8025 }
8026
8027 len +=
8028 sprintf(&buf[len],
8029 "Displaying %d channels in 2.4GHz band "
8030 "(802.11bg):\n", count);
8031
8032 for (i = 0; i < count; i++)
8033 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8034 channels[i].chan,
8035 channels[i].power_level,
8036 channels[i].
8037 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8038 " (IEEE 802.11h required)" : "",
8039 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8040 || (channels[i].
8041 flag &
8042 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8043 ", IBSS",
8044 channels[i].
8045 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8046 "active/passive" : "passive only");
8047
8048 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8049 if (hw_mode) {
8050 channels = hw_mode->channels;
8051 count = hw_mode->num_channels;
8052 } else {
8053 channels = NULL;
8054 count = 0;
8055 }
8056
8057 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8058 "(802.11a):\n", count);
8059
8060 for (i = 0; i < count; i++)
8061 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8062 channels[i].chan,
8063 channels[i].power_level,
8064 channels[i].
8065 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8066 " (IEEE 802.11h required)" : "",
8067 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8068 || (channels[i].
8069 flag &
8070 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8071 ", IBSS",
8072 channels[i].
8073 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8074 "active/passive" : "passive only");
8075
8076 return len;
8077 }
8078
8079 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8080
8081 static ssize_t show_statistics(struct device *d,
8082 struct device_attribute *attr, char *buf)
8083 {
8084 struct iwl_priv *priv = dev_get_drvdata(d);
8085 u32 size = sizeof(struct iwl_notif_statistics);
8086 u32 len = 0, ofs = 0;
8087 u8 *data = (u8 *) & priv->statistics;
8088 int rc = 0;
8089
8090 if (!iwl_is_alive(priv))
8091 return -EAGAIN;
8092
8093 mutex_lock(&priv->mutex);
8094 rc = iwl_send_statistics_request(priv);
8095 mutex_unlock(&priv->mutex);
8096
8097 if (rc) {
8098 len = sprintf(buf,
8099 "Error sending statistics request: 0x%08X\n", rc);
8100 return len;
8101 }
8102
8103 while (size && (PAGE_SIZE - len)) {
8104 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8105 PAGE_SIZE - len, 1);
8106 len = strlen(buf);
8107 if (PAGE_SIZE - len)
8108 buf[len++] = '\n';
8109
8110 ofs += 16;
8111 size -= min(size, 16U);
8112 }
8113
8114 return len;
8115 }
8116
8117 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8118
8119 static ssize_t show_antenna(struct device *d,
8120 struct device_attribute *attr, char *buf)
8121 {
8122 struct iwl_priv *priv = dev_get_drvdata(d);
8123
8124 if (!iwl_is_alive(priv))
8125 return -EAGAIN;
8126
8127 return sprintf(buf, "%d\n", priv->antenna);
8128 }
8129
8130 static ssize_t store_antenna(struct device *d,
8131 struct device_attribute *attr,
8132 const char *buf, size_t count)
8133 {
8134 int ant;
8135 struct iwl_priv *priv = dev_get_drvdata(d);
8136
8137 if (count == 0)
8138 return 0;
8139
8140 if (sscanf(buf, "%1i", &ant) != 1) {
8141 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8142 return count;
8143 }
8144
8145 if ((ant >= 0) && (ant <= 2)) {
8146 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8147 priv->antenna = (enum iwl_antenna)ant;
8148 } else
8149 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8150
8151
8152 return count;
8153 }
8154
8155 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8156
8157 static ssize_t show_status(struct device *d,
8158 struct device_attribute *attr, char *buf)
8159 {
8160 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8161 if (!iwl_is_alive(priv))
8162 return -EAGAIN;
8163 return sprintf(buf, "0x%08x\n", (int)priv->status);
8164 }
8165
8166 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8167
8168 static ssize_t dump_error_log(struct device *d,
8169 struct device_attribute *attr,
8170 const char *buf, size_t count)
8171 {
8172 char *p = (char *)buf;
8173
8174 if (p[0] == '1')
8175 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8176
8177 return strnlen(buf, count);
8178 }
8179
8180 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8181
8182 static ssize_t dump_event_log(struct device *d,
8183 struct device_attribute *attr,
8184 const char *buf, size_t count)
8185 {
8186 char *p = (char *)buf;
8187
8188 if (p[0] == '1')
8189 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8190
8191 return strnlen(buf, count);
8192 }
8193
8194 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8195
8196 /*****************************************************************************
8197 *
8198 * driver setup and teardown
8199 *
8200 *****************************************************************************/
8201
8202 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8203 {
8204 priv->workqueue = create_workqueue(DRV_NAME);
8205
8206 init_waitqueue_head(&priv->wait_command_queue);
8207
8208 INIT_WORK(&priv->up, iwl_bg_up);
8209 INIT_WORK(&priv->restart, iwl_bg_restart);
8210 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8211 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8212 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8213 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8214 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8215 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8216 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8217 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8218 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8219 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8220
8221 iwl_hw_setup_deferred_work(priv);
8222
8223 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8224 iwl_irq_tasklet, (unsigned long)priv);
8225 }
8226
8227 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8228 {
8229 iwl_hw_cancel_deferred_work(priv);
8230
8231 cancel_delayed_work(&priv->scan_check);
8232 cancel_delayed_work(&priv->alive_start);
8233 cancel_delayed_work(&priv->post_associate);
8234 cancel_work_sync(&priv->beacon_update);
8235 }
8236
8237 static struct attribute *iwl_sysfs_entries[] = {
8238 &dev_attr_antenna.attr,
8239 &dev_attr_channels.attr,
8240 &dev_attr_dump_errors.attr,
8241 &dev_attr_dump_events.attr,
8242 &dev_attr_flags.attr,
8243 &dev_attr_filter_flags.attr,
8244 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8245 &dev_attr_measurement.attr,
8246 #endif
8247 &dev_attr_power_level.attr,
8248 &dev_attr_rate.attr,
8249 &dev_attr_retry_rate.attr,
8250 &dev_attr_rf_kill.attr,
8251 &dev_attr_rs_window.attr,
8252 &dev_attr_statistics.attr,
8253 &dev_attr_status.attr,
8254 &dev_attr_temperature.attr,
8255 &dev_attr_tune.attr,
8256 &dev_attr_tx_power.attr,
8257
8258 NULL
8259 };
8260
8261 static struct attribute_group iwl_attribute_group = {
8262 .name = NULL, /* put in device directory */
8263 .attrs = iwl_sysfs_entries,
8264 };
8265
8266 static struct ieee80211_ops iwl_hw_ops = {
8267 .tx = iwl_mac_tx,
8268 .start = iwl_mac_start,
8269 .stop = iwl_mac_stop,
8270 .add_interface = iwl_mac_add_interface,
8271 .remove_interface = iwl_mac_remove_interface,
8272 .config = iwl_mac_config,
8273 .config_interface = iwl_mac_config_interface,
8274 .configure_filter = iwl_configure_filter,
8275 .set_key = iwl_mac_set_key,
8276 .get_stats = iwl_mac_get_stats,
8277 .get_tx_stats = iwl_mac_get_tx_stats,
8278 .conf_tx = iwl_mac_conf_tx,
8279 .get_tsf = iwl_mac_get_tsf,
8280 .reset_tsf = iwl_mac_reset_tsf,
8281 .beacon_update = iwl_mac_beacon_update,
8282 .hw_scan = iwl_mac_hw_scan
8283 };
8284
8285 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8286 {
8287 int err = 0;
8288 u32 pci_id;
8289 struct iwl_priv *priv;
8290 struct ieee80211_hw *hw;
8291 int i;
8292
8293 if (iwl_param_disable_hw_scan) {
8294 IWL_DEBUG_INFO("Disabling hw_scan\n");
8295 iwl_hw_ops.hw_scan = NULL;
8296 }
8297
8298 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8299 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8300 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8301 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8302 err = -EINVAL;
8303 goto out;
8304 }
8305
8306 /* mac80211 allocates memory for this device instance, including
8307 * space for this driver's private structure */
8308 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8309 if (hw == NULL) {
8310 IWL_ERROR("Can not allocate network device\n");
8311 err = -ENOMEM;
8312 goto out;
8313 }
8314 SET_IEEE80211_DEV(hw, &pdev->dev);
8315
8316 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8317 priv = hw->priv;
8318 priv->hw = hw;
8319
8320 priv->pci_dev = pdev;
8321 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8322 #ifdef CONFIG_IWLWIFI_DEBUG
8323 iwl_debug_level = iwl_param_debug;
8324 atomic_set(&priv->restrict_refcnt, 0);
8325 #endif
8326 priv->retry_rate = 1;
8327
8328 priv->ibss_beacon = NULL;
8329
8330 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8331 * the range of signal quality values that we'll provide.
8332 * Negative values for level/noise indicate that we'll provide dBm.
8333 * For WE, at least, non-0 values here *enable* display of values
8334 * in app (iwconfig). */
8335 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8336 hw->max_noise = -20; /* noise level, negative indicates dBm */
8337 hw->max_signal = 100; /* link quality indication (%) */
8338
8339 /* Tell mac80211 our Tx characteristics */
8340 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8341
8342 hw->queues = 4;
8343
8344 spin_lock_init(&priv->lock);
8345 spin_lock_init(&priv->power_data.lock);
8346 spin_lock_init(&priv->sta_lock);
8347 spin_lock_init(&priv->hcmd_lock);
8348
8349 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8350 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8351
8352 INIT_LIST_HEAD(&priv->free_frames);
8353
8354 mutex_init(&priv->mutex);
8355 if (pci_enable_device(pdev)) {
8356 err = -ENODEV;
8357 goto out_ieee80211_free_hw;
8358 }
8359
8360 pci_set_master(pdev);
8361
8362 iwl_clear_stations_table(priv);
8363
8364 priv->data_retry_limit = -1;
8365 priv->ieee_channels = NULL;
8366 priv->ieee_rates = NULL;
8367 priv->phymode = -1;
8368
8369 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8370 if (!err)
8371 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8372 if (err) {
8373 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8374 goto out_pci_disable_device;
8375 }
8376
8377 pci_set_drvdata(pdev, priv);
8378 err = pci_request_regions(pdev, DRV_NAME);
8379 if (err)
8380 goto out_pci_disable_device;
8381 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8382 * PCI Tx retries from interfering with C3 CPU state */
8383 pci_write_config_byte(pdev, 0x41, 0x00);
8384 priv->hw_base = pci_iomap(pdev, 0, 0);
8385 if (!priv->hw_base) {
8386 err = -ENODEV;
8387 goto out_pci_release_regions;
8388 }
8389
8390 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8391 (unsigned long long) pci_resource_len(pdev, 0));
8392 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8393
8394 /* Initialize module parameter values here */
8395
8396 if (iwl_param_disable) {
8397 set_bit(STATUS_RF_KILL_SW, &priv->status);
8398 IWL_DEBUG_INFO("Radio disabled.\n");
8399 }
8400
8401 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8402
8403 pci_id =
8404 (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8405
8406 switch (pci_id) {
8407 case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
8408 case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
8409 case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
8410 case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
8411 priv->is_abg = 0;
8412 break;
8413
8414 /*
8415 * Rest are assumed ABG SKU -- if this is not the
8416 * case then the card will get the wrong 'Detected'
8417 * line in the kernel log however the code that
8418 * initializes the GEO table will detect no A-band
8419 * channels and remove the is_abg mask.
8420 */
8421 default:
8422 priv->is_abg = 1;
8423 break;
8424 }
8425
8426 printk(KERN_INFO DRV_NAME
8427 ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8428 priv->is_abg ? "A" : "");
8429
8430 /* Device-specific setup */
8431 if (iwl_hw_set_hw_setting(priv)) {
8432 IWL_ERROR("failed to set hw settings\n");
8433 mutex_unlock(&priv->mutex);
8434 goto out_iounmap;
8435 }
8436
8437 #ifdef CONFIG_IWLWIFI_QOS
8438 if (iwl_param_qos_enable)
8439 priv->qos_data.qos_enable = 1;
8440
8441 iwl_reset_qos(priv);
8442
8443 priv->qos_data.qos_active = 0;
8444 priv->qos_data.qos_cap.val = 0;
8445 #endif /* CONFIG_IWLWIFI_QOS */
8446
8447 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8448 iwl_setup_deferred_work(priv);
8449 iwl_setup_rx_handlers(priv);
8450
8451 priv->rates_mask = IWL_RATES_MASK;
8452 /* If power management is turned on, default to AC mode */
8453 priv->power_mode = IWL_POWER_AC;
8454 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8455
8456 pci_enable_msi(pdev);
8457
8458 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8459 if (err) {
8460 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8461 goto out_disable_msi;
8462 }
8463
8464 mutex_lock(&priv->mutex);
8465
8466 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8467 if (err) {
8468 IWL_ERROR("failed to create sysfs device attributes\n");
8469 mutex_unlock(&priv->mutex);
8470 goto out_release_irq;
8471 }
8472
8473 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8474 * ucode filename and max sizes are card-specific. */
8475 err = iwl_read_ucode(priv);
8476 if (err) {
8477 IWL_ERROR("Could not read microcode: %d\n", err);
8478 mutex_unlock(&priv->mutex);
8479 goto out_pci_alloc;
8480 }
8481
8482 mutex_unlock(&priv->mutex);
8483
8484 IWL_DEBUG_INFO("Queing UP work.\n");
8485
8486 queue_work(priv->workqueue, &priv->up);
8487
8488 return 0;
8489
8490 out_pci_alloc:
8491 iwl_dealloc_ucode_pci(priv);
8492
8493 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8494
8495 out_release_irq:
8496 free_irq(pdev->irq, priv);
8497
8498 out_disable_msi:
8499 pci_disable_msi(pdev);
8500 destroy_workqueue(priv->workqueue);
8501 priv->workqueue = NULL;
8502 iwl_unset_hw_setting(priv);
8503
8504 out_iounmap:
8505 pci_iounmap(pdev, priv->hw_base);
8506 out_pci_release_regions:
8507 pci_release_regions(pdev);
8508 out_pci_disable_device:
8509 pci_disable_device(pdev);
8510 pci_set_drvdata(pdev, NULL);
8511 out_ieee80211_free_hw:
8512 ieee80211_free_hw(priv->hw);
8513 out:
8514 return err;
8515 }
8516
8517 static void iwl_pci_remove(struct pci_dev *pdev)
8518 {
8519 struct iwl_priv *priv = pci_get_drvdata(pdev);
8520 struct list_head *p, *q;
8521 int i;
8522
8523 if (!priv)
8524 return;
8525
8526 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8527
8528 mutex_lock(&priv->mutex);
8529 set_bit(STATUS_EXIT_PENDING, &priv->status);
8530 __iwl_down(priv);
8531 mutex_unlock(&priv->mutex);
8532
8533 /* Free MAC hash list for ADHOC */
8534 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8535 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8536 list_del(p);
8537 kfree(list_entry(p, struct iwl_ibss_seq, list));
8538 }
8539 }
8540
8541 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8542
8543 iwl_dealloc_ucode_pci(priv);
8544
8545 if (priv->rxq.bd)
8546 iwl_rx_queue_free(priv, &priv->rxq);
8547 iwl_hw_txq_ctx_free(priv);
8548
8549 iwl_unset_hw_setting(priv);
8550 iwl_clear_stations_table(priv);
8551
8552 if (priv->mac80211_registered) {
8553 ieee80211_unregister_hw(priv->hw);
8554 iwl_rate_control_unregister(priv->hw);
8555 }
8556
8557 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8558 * priv->workqueue... so we can't take down the workqueue
8559 * until now... */
8560 destroy_workqueue(priv->workqueue);
8561 priv->workqueue = NULL;
8562
8563 free_irq(pdev->irq, priv);
8564 pci_disable_msi(pdev);
8565 pci_iounmap(pdev, priv->hw_base);
8566 pci_release_regions(pdev);
8567 pci_disable_device(pdev);
8568 pci_set_drvdata(pdev, NULL);
8569
8570 kfree(priv->channel_info);
8571
8572 kfree(priv->ieee_channels);
8573 kfree(priv->ieee_rates);
8574
8575 if (priv->ibss_beacon)
8576 dev_kfree_skb(priv->ibss_beacon);
8577
8578 ieee80211_free_hw(priv->hw);
8579 }
8580
8581 #ifdef CONFIG_PM
8582
8583 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8584 {
8585 struct iwl_priv *priv = pci_get_drvdata(pdev);
8586
8587 mutex_lock(&priv->mutex);
8588
8589 set_bit(STATUS_IN_SUSPEND, &priv->status);
8590
8591 /* Take down the device; powers it off, etc. */
8592 __iwl_down(priv);
8593
8594 if (priv->mac80211_registered)
8595 ieee80211_stop_queues(priv->hw);
8596
8597 pci_save_state(pdev);
8598 pci_disable_device(pdev);
8599 pci_set_power_state(pdev, PCI_D3hot);
8600
8601 mutex_unlock(&priv->mutex);
8602
8603 return 0;
8604 }
8605
8606 static void iwl_resume(struct iwl_priv *priv)
8607 {
8608 unsigned long flags;
8609
8610 /* The following it a temporary work around due to the
8611 * suspend / resume not fully initializing the NIC correctly.
8612 * Without all of the following, resume will not attempt to take
8613 * down the NIC (it shouldn't really need to) and will just try
8614 * and bring the NIC back up. However that fails during the
8615 * ucode verification process. This then causes iwl_down to be
8616 * called *after* iwl_hw_nic_init() has succeeded -- which
8617 * then lets the next init sequence succeed. So, we've
8618 * replicated all of that NIC init code here... */
8619
8620 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8621
8622 iwl_hw_nic_init(priv);
8623
8624 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8625 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8626 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8627 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8628 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8629 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8630
8631 /* tell the device to stop sending interrupts */
8632 iwl_disable_interrupts(priv);
8633
8634 spin_lock_irqsave(&priv->lock, flags);
8635 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8636
8637 if (!iwl_grab_restricted_access(priv)) {
8638 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8639 APMG_CLK_VAL_DMA_CLK_RQT);
8640 iwl_release_restricted_access(priv);
8641 }
8642 spin_unlock_irqrestore(&priv->lock, flags);
8643
8644 udelay(5);
8645
8646 iwl_hw_nic_reset(priv);
8647
8648 /* Bring the device back up */
8649 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8650 queue_work(priv->workqueue, &priv->up);
8651 }
8652
8653 static int iwl_pci_resume(struct pci_dev *pdev)
8654 {
8655 struct iwl_priv *priv = pci_get_drvdata(pdev);
8656 int err;
8657
8658 printk(KERN_INFO "Coming out of suspend...\n");
8659
8660 mutex_lock(&priv->mutex);
8661
8662 pci_set_power_state(pdev, PCI_D0);
8663 err = pci_enable_device(pdev);
8664 pci_restore_state(pdev);
8665
8666 /*
8667 * Suspend/Resume resets the PCI configuration space, so we have to
8668 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8669 * from interfering with C3 CPU state. pci_restore_state won't help
8670 * here since it only restores the first 64 bytes pci config header.
8671 */
8672 pci_write_config_byte(pdev, 0x41, 0x00);
8673
8674 iwl_resume(priv);
8675 mutex_unlock(&priv->mutex);
8676
8677 return 0;
8678 }
8679
8680 #endif /* CONFIG_PM */
8681
8682 /*****************************************************************************
8683 *
8684 * driver and module entry point
8685 *
8686 *****************************************************************************/
8687
8688 static struct pci_driver iwl_driver = {
8689 .name = DRV_NAME,
8690 .id_table = iwl_hw_card_ids,
8691 .probe = iwl_pci_probe,
8692 .remove = __devexit_p(iwl_pci_remove),
8693 #ifdef CONFIG_PM
8694 .suspend = iwl_pci_suspend,
8695 .resume = iwl_pci_resume,
8696 #endif
8697 };
8698
8699 static int __init iwl_init(void)
8700 {
8701
8702 int ret;
8703 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8704 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8705 ret = pci_register_driver(&iwl_driver);
8706 if (ret) {
8707 IWL_ERROR("Unable to initialize PCI module\n");
8708 return ret;
8709 }
8710 #ifdef CONFIG_IWLWIFI_DEBUG
8711 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8712 if (ret) {
8713 IWL_ERROR("Unable to create driver sysfs file\n");
8714 pci_unregister_driver(&iwl_driver);
8715 return ret;
8716 }
8717 #endif
8718
8719 return ret;
8720 }
8721
8722 static void __exit iwl_exit(void)
8723 {
8724 #ifdef CONFIG_IWLWIFI_DEBUG
8725 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8726 #endif
8727 pci_unregister_driver(&iwl_driver);
8728 }
8729
8730 module_param_named(antenna, iwl_param_antenna, int, 0444);
8731 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8732 module_param_named(disable, iwl_param_disable, int, 0444);
8733 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8734 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8735 MODULE_PARM_DESC(hwcrypto,
8736 "using hardware crypto engine (default 0 [software])\n");
8737 module_param_named(debug, iwl_param_debug, int, 0444);
8738 MODULE_PARM_DESC(debug, "debug output mask");
8739 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8740 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8741
8742 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8743 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8744
8745 /* QoS */
8746 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8747 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8748
8749 module_exit(iwl_exit);
8750 module_init(iwl_init);
Linux kernel - Deliverables
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