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