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[IWLWIFI]: add iwlwifi wireless drivers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
blob474b6402040c2927a494e4ee7cf5f1e852e97b9c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 /*
31 * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
32 * by defining IWL to either 3945 or 4965. The Makefile used when building
33 * the base targets will create base-3945.o and base-4965.o
34 *
35 * The eventual goal is to move as many of the #if IWL / #endif blocks out of
36 * this file and into the hardware specific implementation files (iwl-XXXX.c)
37 * and leave only the common (non #ifdef sprinkled) code in this file
38 */
39
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/version.h>
43 #include <linux/init.h>
44 #include <linux/pci.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/delay.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/wireless.h>
50 #include <linux/firmware.h>
51 #include <linux/skbuff.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/if_arp.h>
55
56 #include <net/ieee80211_radiotap.h>
57 #include <net/mac80211.h>
58
59 #include <asm/div64.h>
60
61 #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 "0.1.15k" 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 IPW operates with six queues, one receive queue in the device's
206 * sram, one transmit queue for sending commands to the device firmware,
207 * and four transmit queues for data.
208 ***************************************************/
209
210 static int iwl_queue_space(const struct iwl_queue *q)
211 {
212 int s = q->last_used - q->first_empty;
213
214 if (q->last_used > q->first_empty)
215 s -= q->n_bd;
216
217 if (s <= 0)
218 s += q->n_window;
219 /* keep some reserve to not confuse empty and full situations */
220 s -= 2;
221 if (s < 0)
222 s = 0;
223 return s;
224 }
225
226 /* XXX: n_bd must be power-of-two size */
227 static inline int iwl_queue_inc_wrap(int index, int n_bd)
228 {
229 return ++index & (n_bd - 1);
230 }
231
232 /* XXX: n_bd must be power-of-two size */
233 static inline int iwl_queue_dec_wrap(int index, int n_bd)
234 {
235 return --index & (n_bd - 1);
236 }
237
238 static inline int x2_queue_used(const struct iwl_queue *q, int i)
239 {
240 return q->first_empty > q->last_used ?
241 (i >= q->last_used && i < q->first_empty) :
242 !(i < q->last_used && i >= q->first_empty);
243 }
244
245 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
246 {
247 if (is_huge)
248 return q->n_window;
249
250 return index & (q->n_window - 1);
251 }
252
253 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
254 int count, int slots_num, u32 id)
255 {
256 q->n_bd = count;
257 q->n_window = slots_num;
258 q->id = id;
259
260 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
261 * and iwl_queue_dec_wrap are broken. */
262 BUG_ON(!is_power_of_2(count));
263
264 /* slots_num must be power-of-two size, otherwise
265 * get_cmd_index is broken. */
266 BUG_ON(!is_power_of_2(slots_num));
267
268 q->low_mark = q->n_window / 4;
269 if (q->low_mark < 4)
270 q->low_mark = 4;
271
272 q->high_mark = q->n_window / 8;
273 if (q->high_mark < 2)
274 q->high_mark = 2;
275
276 q->first_empty = q->last_used = 0;
277
278 return 0;
279 }
280
281 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
282 struct iwl_tx_queue *txq, u32 id)
283 {
284 struct pci_dev *dev = priv->pci_dev;
285
286 if (id != IWL_CMD_QUEUE_NUM) {
287 txq->txb = kmalloc(sizeof(txq->txb[0]) *
288 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
289 if (!txq->txb) {
290 IWL_ERROR("kmalloc for auxilary BD "
291 "structures failed\n");
292 goto error;
293 }
294 } else
295 txq->txb = NULL;
296
297 txq->bd = pci_alloc_consistent(dev,
298 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
299 &txq->q.dma_addr);
300
301 if (!txq->bd) {
302 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
303 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
304 goto error;
305 }
306 txq->q.id = id;
307
308 return 0;
309
310 error:
311 if (txq->txb) {
312 kfree(txq->txb);
313 txq->txb = NULL;
314 }
315
316 return -ENOMEM;
317 }
318
319 int iwl_tx_queue_init(struct iwl_priv *priv,
320 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
321 {
322 struct pci_dev *dev = priv->pci_dev;
323 int len;
324 int rc = 0;
325
326 /* alocate command space + one big command for scan since scan
327 * command is very huge the system will not have two scan at the
328 * same time */
329 len = sizeof(struct iwl_cmd) * slots_num;
330 if (txq_id == IWL_CMD_QUEUE_NUM)
331 len += IWL_MAX_SCAN_SIZE;
332 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
333 if (!txq->cmd)
334 return -ENOMEM;
335
336 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
337 if (rc) {
338 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
339
340 return -ENOMEM;
341 }
342 txq->need_update = 0;
343
344 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
345 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
346 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
347 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
348
349 iwl_hw_tx_queue_init(priv, txq);
350
351 return 0;
352 }
353
354 /**
355 * iwl_tx_queue_free - Deallocate DMA queue.
356 * @txq: Transmit queue to deallocate.
357 *
358 * Empty queue by removing and destroying all BD's.
359 * Free all buffers. txq itself is not freed.
360 *
361 */
362 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
363 {
364 struct iwl_queue *q = &txq->q;
365 struct pci_dev *dev = priv->pci_dev;
366 int len;
367
368 if (q->n_bd == 0)
369 return;
370
371 /* first, empty all BD's */
372 for (; q->first_empty != q->last_used;
373 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
374 iwl_hw_txq_free_tfd(priv, txq);
375
376 len = sizeof(struct iwl_cmd) * q->n_window;
377 if (q->id == IWL_CMD_QUEUE_NUM)
378 len += IWL_MAX_SCAN_SIZE;
379
380 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
381
382 /* free buffers belonging to queue itself */
383 if (txq->q.n_bd)
384 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
385 txq->q.n_bd, txq->bd, txq->q.dma_addr);
386
387 if (txq->txb) {
388 kfree(txq->txb);
389 txq->txb = NULL;
390 }
391
392 /* 0 fill whole structure */
393 memset(txq, 0, sizeof(*txq));
394 }
395
396 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
397
398 /*************** STATION TABLE MANAGEMENT ****
399 *
400 * NOTE: This needs to be overhauled to better synchronize between
401 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
402 *
403 * mac80211 should also be examined to determine if sta_info is duplicating
404 * the functionality provided here
405 */
406
407 /**************************************************************/
408 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
409 {
410 int index = IWL_INVALID_STATION;
411 int i;
412 unsigned long flags;
413
414 spin_lock_irqsave(&priv->sta_lock, flags);
415
416 if (is_ap)
417 index = IWL_AP_ID;
418 else if (is_broadcast_ether_addr(addr))
419 index = priv->hw_setting.bcast_sta_id;
420 else
421 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
422 if (priv->stations[i].used &&
423 !compare_ether_addr(priv->stations[i].sta.sta.addr,
424 addr)) {
425 index = i;
426 break;
427 }
428
429 if (unlikely(index == IWL_INVALID_STATION))
430 goto out;
431
432 if (priv->stations[index].used) {
433 priv->stations[index].used = 0;
434 priv->num_stations--;
435 }
436
437 BUG_ON(priv->num_stations < 0);
438
439 out:
440 spin_unlock_irqrestore(&priv->sta_lock, flags);
441 return 0;
442 }
443
444 static void iwl_clear_stations_table(struct iwl_priv *priv)
445 {
446 unsigned long flags;
447
448 spin_lock_irqsave(&priv->sta_lock, flags);
449
450 priv->num_stations = 0;
451 memset(priv->stations, 0, sizeof(priv->stations));
452
453 spin_unlock_irqrestore(&priv->sta_lock, flags);
454 }
455
456
457 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
458 {
459 int i;
460 int index = IWL_INVALID_STATION;
461 struct iwl_station_entry *station;
462 unsigned long flags_spin;
463
464 spin_lock_irqsave(&priv->sta_lock, flags_spin);
465 if (is_ap)
466 index = IWL_AP_ID;
467 else if (is_broadcast_ether_addr(addr))
468 index = priv->hw_setting.bcast_sta_id;
469 else
470 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
471 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
472 addr)) {
473 index = i;
474 break;
475 }
476
477 if (!priv->stations[i].used &&
478 index == IWL_INVALID_STATION)
479 index = i;
480 }
481
482 /* These twh conditions has the same outcome but keep them separate
483 since they have different meaning */
484 if (unlikely(index == IWL_INVALID_STATION)) {
485 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
486 return index;
487 }
488
489 if (priv->stations[index].used &&
490 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
491 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
492 return index;
493 }
494
495 IWL_DEBUG_ASSOC("Add STA ID %d: " MAC_FMT "\n", index, MAC_ARG(addr));
496 station = &priv->stations[index];
497 station->used = 1;
498 priv->num_stations++;
499
500 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
501 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
502 station->sta.mode = 0;
503 station->sta.sta.sta_id = index;
504 station->sta.station_flags = 0;
505
506 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
507 iwl_send_add_station(priv, &station->sta, flags);
508 return index;
509
510 }
511
512 /*************** DRIVER STATUS FUNCTIONS *****/
513
514 static inline int iwl_is_ready(struct iwl_priv *priv)
515 {
516 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
517 * set but EXIT_PENDING is not */
518 return test_bit(STATUS_READY, &priv->status) &&
519 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
520 !test_bit(STATUS_EXIT_PENDING, &priv->status);
521 }
522
523 static inline int iwl_is_alive(struct iwl_priv *priv)
524 {
525 return test_bit(STATUS_ALIVE, &priv->status);
526 }
527
528 static inline int iwl_is_init(struct iwl_priv *priv)
529 {
530 return test_bit(STATUS_INIT, &priv->status);
531 }
532
533 static inline int iwl_is_rfkill(struct iwl_priv *priv)
534 {
535 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
536 test_bit(STATUS_RF_KILL_SW, &priv->status);
537 }
538
539 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
540 {
541
542 if (iwl_is_rfkill(priv))
543 return 0;
544
545 return iwl_is_ready(priv);
546 }
547
548 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
549
550 #define IWL_CMD(x) case x : return #x
551
552 static const char *get_cmd_string(u8 cmd)
553 {
554 switch (cmd) {
555 IWL_CMD(REPLY_ALIVE);
556 IWL_CMD(REPLY_ERROR);
557 IWL_CMD(REPLY_RXON);
558 IWL_CMD(REPLY_RXON_ASSOC);
559 IWL_CMD(REPLY_QOS_PARAM);
560 IWL_CMD(REPLY_RXON_TIMING);
561 IWL_CMD(REPLY_ADD_STA);
562 IWL_CMD(REPLY_REMOVE_STA);
563 IWL_CMD(REPLY_REMOVE_ALL_STA);
564 IWL_CMD(REPLY_3945_RX);
565 IWL_CMD(REPLY_TX);
566 IWL_CMD(REPLY_RATE_SCALE);
567 IWL_CMD(REPLY_LEDS_CMD);
568 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
569 IWL_CMD(RADAR_NOTIFICATION);
570 IWL_CMD(REPLY_QUIET_CMD);
571 IWL_CMD(REPLY_CHANNEL_SWITCH);
572 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
573 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
574 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
575 IWL_CMD(POWER_TABLE_CMD);
576 IWL_CMD(PM_SLEEP_NOTIFICATION);
577 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
578 IWL_CMD(REPLY_SCAN_CMD);
579 IWL_CMD(REPLY_SCAN_ABORT_CMD);
580 IWL_CMD(SCAN_START_NOTIFICATION);
581 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
582 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
583 IWL_CMD(BEACON_NOTIFICATION);
584 IWL_CMD(REPLY_TX_BEACON);
585 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
586 IWL_CMD(QUIET_NOTIFICATION);
587 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
588 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
589 IWL_CMD(REPLY_BT_CONFIG);
590 IWL_CMD(REPLY_STATISTICS_CMD);
591 IWL_CMD(STATISTICS_NOTIFICATION);
592 IWL_CMD(REPLY_CARD_STATE_CMD);
593 IWL_CMD(CARD_STATE_NOTIFICATION);
594 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
595 default:
596 return "UNKNOWN";
597
598 }
599 }
600
601 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
602
603 /**
604 * iwl_enqueue_hcmd - enqueue a uCode command
605 * @priv: device private data point
606 * @cmd: a point to the ucode command structure
607 *
608 * The function returns < 0 values to indicate the operation is
609 * failed. On success, it turns the index (> 0) of command in the
610 * command queue.
611 */
612 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
613 {
614 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
615 struct iwl_queue *q = &txq->q;
616 struct iwl_tfd_frame *tfd;
617 u32 *control_flags;
618 struct iwl_cmd *out_cmd;
619 u32 idx;
620 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
621 dma_addr_t phys_addr;
622 int pad;
623 u16 count;
624 int ret;
625 unsigned long flags;
626
627 /* If any of the command structures end up being larger than
628 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
629 * we will need to increase the size of the TFD entries */
630 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
631 !(cmd->meta.flags & CMD_SIZE_HUGE));
632
633 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
634 IWL_ERROR("No space for Tx\n");
635 return -ENOSPC;
636 }
637
638 spin_lock_irqsave(&priv->hcmd_lock, flags);
639
640 tfd = &txq->bd[q->first_empty];
641 memset(tfd, 0, sizeof(*tfd));
642
643 control_flags = (u32 *) tfd;
644
645 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
646 out_cmd = &txq->cmd[idx];
647
648 out_cmd->hdr.cmd = cmd->id;
649 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
650 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
651
652 /* At this point, the out_cmd now has all of the incoming cmd
653 * information */
654
655 out_cmd->hdr.flags = 0;
656 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
657 INDEX_TO_SEQ(q->first_empty));
658 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
659 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
660
661 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
662 offsetof(struct iwl_cmd, hdr);
663 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
664
665 pad = U32_PAD(cmd->len);
666 count = TFD_CTL_COUNT_GET(*control_flags);
667 *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
668
669 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
670 "%d bytes at %d[%d]:%d\n",
671 get_cmd_string(out_cmd->hdr.cmd),
672 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
673 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
674
675 txq->need_update = 1;
676 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
677 ret = iwl_tx_queue_update_write_ptr(priv, txq);
678
679 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
680 return ret ? ret : idx;
681 }
682
683 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
684 {
685 int ret;
686
687 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
688
689 /* An asynchronous command can not expect an SKB to be set. */
690 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
691
692 /* An asynchronous command MUST have a callback. */
693 BUG_ON(!cmd->meta.u.callback);
694
695 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
696 return -EBUSY;
697
698 ret = iwl_enqueue_hcmd(priv, cmd);
699 if (ret < 0) {
700 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
701 get_cmd_string(cmd->id), ret);
702 return ret;
703 }
704 return 0;
705 }
706
707 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
708 {
709 int cmd_idx;
710 int ret;
711 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
712
713 BUG_ON(cmd->meta.flags & CMD_ASYNC);
714
715 /* A synchronous command can not have a callback set. */
716 BUG_ON(cmd->meta.u.callback != NULL);
717
718 if (atomic_xchg(&entry, 1)) {
719 IWL_ERROR("Error sending %s: Already sending a host command\n",
720 get_cmd_string(cmd->id));
721 return -EBUSY;
722 }
723
724 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
725
726 if (cmd->meta.flags & CMD_WANT_SKB)
727 cmd->meta.source = &cmd->meta;
728
729 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
730 if (cmd_idx < 0) {
731 ret = cmd_idx;
732 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
733 get_cmd_string(cmd->id), ret);
734 goto out;
735 }
736
737 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
738 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
739 HOST_COMPLETE_TIMEOUT);
740 if (!ret) {
741 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
742 IWL_ERROR("Error sending %s: time out after %dms.\n",
743 get_cmd_string(cmd->id),
744 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
745
746 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
747 ret = -ETIMEDOUT;
748 goto cancel;
749 }
750 }
751
752 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
753 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
754 get_cmd_string(cmd->id));
755 ret = -ECANCELED;
756 goto fail;
757 }
758 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
759 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
760 get_cmd_string(cmd->id));
761 ret = -EIO;
762 goto fail;
763 }
764 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
765 IWL_ERROR("Error: Response NULL in '%s'\n",
766 get_cmd_string(cmd->id));
767 ret = -EIO;
768 goto out;
769 }
770
771 ret = 0;
772 goto out;
773
774 cancel:
775 if (cmd->meta.flags & CMD_WANT_SKB) {
776 struct iwl_cmd *qcmd;
777
778 /* Cancel the CMD_WANT_SKB flag for the cmd in the
779 * TX cmd queue. Otherwise in case the cmd comes
780 * in later, it will possibly set an invalid
781 * address (cmd->meta.source). */
782 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
783 qcmd->meta.flags &= ~CMD_WANT_SKB;
784 }
785 fail:
786 if (cmd->meta.u.skb) {
787 dev_kfree_skb_any(cmd->meta.u.skb);
788 cmd->meta.u.skb = NULL;
789 }
790 out:
791 atomic_set(&entry, 0);
792 return ret;
793 }
794
795 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
796 {
797 /* A command can not be asynchronous AND expect an SKB to be set. */
798 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
799 (cmd->meta.flags & CMD_WANT_SKB));
800
801 if (cmd->meta.flags & CMD_ASYNC)
802 return iwl_send_cmd_async(priv, cmd);
803
804 return iwl_send_cmd_sync(priv, cmd);
805 }
806
807 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
808 {
809 struct iwl_host_cmd cmd = {
810 .id = id,
811 .len = len,
812 .data = data,
813 };
814
815 return iwl_send_cmd_sync(priv, &cmd);
816 }
817
818 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
819 {
820 struct iwl_host_cmd cmd = {
821 .id = id,
822 .len = sizeof(val),
823 .data = &val,
824 };
825
826 return iwl_send_cmd_sync(priv, &cmd);
827 }
828
829 int iwl_send_statistics_request(struct iwl_priv *priv)
830 {
831 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
832 }
833
834 /**
835 * iwl_rxon_add_station - add station into station table.
836 *
837 * there is only one AP station with id= IWL_AP_ID
838 * NOTE: mutex must be held before calling the this fnction
839 */
840 static int iwl_rxon_add_station(struct iwl_priv *priv,
841 const u8 *addr, int is_ap)
842 {
843 u8 rc;
844
845 /* Remove this station if it happens to already exist */
846 iwl_remove_station(priv, addr, is_ap);
847
848 rc = iwl_add_station(priv, addr, is_ap, 0);
849
850 return rc;
851 }
852
853 /**
854 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
855 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
856 * @channel: Any channel valid for the requested phymode
857
858 * In addition to setting the staging RXON, priv->phymode is also set.
859 *
860 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
861 * in the staging RXON flag structure based on the phymode
862 */
863 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
864 {
865 if (!iwl_get_channel_info(priv, phymode, channel)) {
866 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
867 channel, phymode);
868 return -EINVAL;
869 }
870
871 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
872 (priv->phymode == phymode))
873 return 0;
874
875 priv->staging_rxon.channel = cpu_to_le16(channel);
876 if (phymode == MODE_IEEE80211A)
877 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
878 else
879 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
880
881 priv->phymode = phymode;
882
883 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
884
885 return 0;
886 }
887
888 /**
889 * iwl_check_rxon_cmd - validate RXON structure is valid
890 *
891 * NOTE: This is really only useful during development and can eventually
892 * be #ifdef'd out once the driver is stable and folks aren't actively
893 * making changes
894 */
895 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
896 {
897 int error = 0;
898 int counter = 1;
899
900 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
901 error |= le32_to_cpu(rxon->flags &
902 (RXON_FLG_TGJ_NARROW_BAND_MSK |
903 RXON_FLG_RADAR_DETECT_MSK));
904 if (error)
905 IWL_WARNING("check 24G fields %d | %d\n",
906 counter++, error);
907 } else {
908 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
909 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
910 if (error)
911 IWL_WARNING("check 52 fields %d | %d\n",
912 counter++, error);
913 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
914 if (error)
915 IWL_WARNING("check 52 CCK %d | %d\n",
916 counter++, error);
917 }
918 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
919 if (error)
920 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
921
922 /* make sure basic rates 6Mbps and 1Mbps are supported */
923 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
924 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
925 if (error)
926 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
927
928 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
929 if (error)
930 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
931
932 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
933 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
934 if (error)
935 IWL_WARNING("check CCK and short slot %d | %d\n",
936 counter++, error);
937
938 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
939 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
940 if (error)
941 IWL_WARNING("check CCK & auto detect %d | %d\n",
942 counter++, error);
943
944 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
945 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
946 if (error)
947 IWL_WARNING("check TGG and auto detect %d | %d\n",
948 counter++, error);
949
950 if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
951 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
952 RXON_FLG_ANT_A_MSK)) == 0);
953 if (error)
954 IWL_WARNING("check antenna %d %d\n", counter++, error);
955
956 if (error)
957 IWL_WARNING("Tuning to channel %d\n",
958 le16_to_cpu(rxon->channel));
959
960 if (error) {
961 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
962 return -1;
963 }
964 return 0;
965 }
966
967 /**
968 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
969 * @priv: staging_rxon is comapred to active_rxon
970 *
971 * If the RXON structure is changing sufficient to require a new
972 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
973 * to indicate a new tune is required.
974 */
975 static int iwl_full_rxon_required(struct iwl_priv *priv)
976 {
977
978 /* These items are only settable from the full RXON command */
979 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
980 compare_ether_addr(priv->staging_rxon.bssid_addr,
981 priv->active_rxon.bssid_addr) ||
982 compare_ether_addr(priv->staging_rxon.node_addr,
983 priv->active_rxon.node_addr) ||
984 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
985 priv->active_rxon.wlap_bssid_addr) ||
986 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
987 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
988 (priv->staging_rxon.air_propagation !=
989 priv->active_rxon.air_propagation) ||
990 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
991 return 1;
992
993 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
994 * be updated with the RXON_ASSOC command -- however only some
995 * flag transitions are allowed using RXON_ASSOC */
996
997 /* Check if we are not switching bands */
998 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
999 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1000 return 1;
1001
1002 /* Check if we are switching association toggle */
1003 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1004 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1005 return 1;
1006
1007 return 0;
1008 }
1009
1010 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1011 {
1012 int rc = 0;
1013 struct iwl_rx_packet *res = NULL;
1014 struct iwl_rxon_assoc_cmd rxon_assoc;
1015 struct iwl_host_cmd cmd = {
1016 .id = REPLY_RXON_ASSOC,
1017 .len = sizeof(rxon_assoc),
1018 .meta.flags = CMD_WANT_SKB,
1019 .data = &rxon_assoc,
1020 };
1021 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1022 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1023
1024 if ((rxon1->flags == rxon2->flags) &&
1025 (rxon1->filter_flags == rxon2->filter_flags) &&
1026 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1027 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1028 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1029 return 0;
1030 }
1031
1032 rxon_assoc.flags = priv->staging_rxon.flags;
1033 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1034 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1035 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1036 rxon_assoc.reserved = 0;
1037
1038 rc = iwl_send_cmd_sync(priv, &cmd);
1039 if (rc)
1040 return rc;
1041
1042 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1043 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1044 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1045 rc = -EIO;
1046 }
1047
1048 priv->alloc_rxb_skb--;
1049 dev_kfree_skb_any(cmd.meta.u.skb);
1050
1051 return rc;
1052 }
1053
1054 /**
1055 * iwl_commit_rxon - commit staging_rxon to hardware
1056 *
1057 * The RXON command in staging_rxon is commited to the hardware and
1058 * the active_rxon structure is updated with the new data. This
1059 * function correctly transitions out of the RXON_ASSOC_MSK state if
1060 * a HW tune is required based on the RXON structure changes.
1061 */
1062 static int iwl_commit_rxon(struct iwl_priv *priv)
1063 {
1064 /* cast away the const for active_rxon in this function */
1065 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1066 int rc = 0;
1067
1068 if (!iwl_is_alive(priv))
1069 return -1;
1070
1071 /* always get timestamp with Rx frame */
1072 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1073
1074 /* select antenna */
1075 priv->staging_rxon.flags &=
1076 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1077 priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1078
1079 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1080 if (rc) {
1081 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1082 return -EINVAL;
1083 }
1084
1085 /* If we don't need to send a full RXON, we can use
1086 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1087 * and other flags for the current radio configuration. */
1088 if (!iwl_full_rxon_required(priv)) {
1089 rc = iwl_send_rxon_assoc(priv);
1090 if (rc) {
1091 IWL_ERROR("Error setting RXON_ASSOC "
1092 "configuration (%d).\n", rc);
1093 return rc;
1094 }
1095
1096 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1097
1098 return 0;
1099 }
1100
1101 /* If we are currently associated and the new config requires
1102 * an RXON_ASSOC and the new config wants the associated mask enabled,
1103 * we must clear the associated from the active configuration
1104 * before we apply the new config */
1105 if (iwl_is_associated(priv) &&
1106 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1107 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1108 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1109
1110 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1111 sizeof(struct iwl_rxon_cmd),
1112 &priv->active_rxon);
1113
1114 /* If the mask clearing failed then we set
1115 * active_rxon back to what it was previously */
1116 if (rc) {
1117 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1118 IWL_ERROR("Error clearing ASSOC_MSK on current "
1119 "configuration (%d).\n", rc);
1120 return rc;
1121 }
1122
1123 /* The RXON bit toggling will have cleared out the
1124 * station table in the uCode, so blank it in the driver
1125 * as well */
1126 iwl_clear_stations_table(priv);
1127 } else if (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) {
1128 /* When switching from non-associated to associated, the
1129 * uCode clears out the station table; so clear it in the
1130 * driver as well */
1131 iwl_clear_stations_table(priv);
1132 }
1133
1134 IWL_DEBUG_INFO("Sending RXON\n"
1135 "* with%s RXON_FILTER_ASSOC_MSK\n"
1136 "* channel = %d\n"
1137 "* bssid = " MAC_FMT "\n",
1138 ((priv->staging_rxon.filter_flags &
1139 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1140 le16_to_cpu(priv->staging_rxon.channel),
1141 MAC_ARG(priv->staging_rxon.bssid_addr));
1142
1143 /* Apply the new configuration */
1144 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1145 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1146 if (rc) {
1147 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1148 return rc;
1149 }
1150
1151 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1152
1153 /* If we issue a new RXON command which required a tune then we must
1154 * send a new TXPOWER command or we won't be able to Tx any frames */
1155 rc = iwl_hw_reg_send_txpower(priv);
1156 if (rc) {
1157 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1158 return rc;
1159 }
1160
1161 /* Add the broadcast address so we can send broadcast frames */
1162 if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1163 IWL_INVALID_STATION) {
1164 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1165 return -EIO;
1166 }
1167
1168 /* If we have set the ASSOC_MSK and we are in BSS mode then
1169 * add the IWL_AP_ID to the station rate table */
1170 if (iwl_is_associated(priv) &&
1171 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1172 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1173 == IWL_INVALID_STATION) {
1174 IWL_ERROR("Error adding AP address for transmit.\n");
1175 return -EIO;
1176 }
1177
1178 /* Init the hardware's rate fallback order based on the
1179 * phymode */
1180 rc = iwl3945_init_hw_rate_table(priv);
1181 if (rc) {
1182 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1183 return -EIO;
1184 }
1185
1186 return 0;
1187 }
1188
1189 static int iwl_send_bt_config(struct iwl_priv *priv)
1190 {
1191 struct iwl_bt_cmd bt_cmd = {
1192 .flags = 3,
1193 .lead_time = 0xAA,
1194 .max_kill = 1,
1195 .kill_ack_mask = 0,
1196 .kill_cts_mask = 0,
1197 };
1198
1199 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1200 sizeof(struct iwl_bt_cmd), &bt_cmd);
1201 }
1202
1203 static int iwl_send_scan_abort(struct iwl_priv *priv)
1204 {
1205 int rc = 0;
1206 struct iwl_rx_packet *res;
1207 struct iwl_host_cmd cmd = {
1208 .id = REPLY_SCAN_ABORT_CMD,
1209 .meta.flags = CMD_WANT_SKB,
1210 };
1211
1212 /* If there isn't a scan actively going on in the hardware
1213 * then we are in between scan bands and not actually
1214 * actively scanning, so don't send the abort command */
1215 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1216 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1217 return 0;
1218 }
1219
1220 rc = iwl_send_cmd_sync(priv, &cmd);
1221 if (rc) {
1222 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1223 return rc;
1224 }
1225
1226 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1227 if (res->u.status != CAN_ABORT_STATUS) {
1228 /* The scan abort will return 1 for success or
1229 * 2 for "failure". A failure condition can be
1230 * due to simply not being in an active scan which
1231 * can occur if we send the scan abort before we
1232 * the microcode has notified us that a scan is
1233 * completed. */
1234 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1235 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1236 clear_bit(STATUS_SCAN_HW, &priv->status);
1237 }
1238
1239 dev_kfree_skb_any(cmd.meta.u.skb);
1240
1241 return rc;
1242 }
1243
1244 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1245 struct iwl_cmd *cmd,
1246 struct sk_buff *skb)
1247 {
1248 return 1;
1249 }
1250
1251 /*
1252 * CARD_STATE_CMD
1253 *
1254 * Use: Sets the internal card state to enable, disable, or halt
1255 *
1256 * When in the 'enable' state the card operates as normal.
1257 * When in the 'disable' state, the card enters into a low power mode.
1258 * When in the 'halt' state, the card is shut down and must be fully
1259 * restarted to come back on.
1260 */
1261 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1262 {
1263 struct iwl_host_cmd cmd = {
1264 .id = REPLY_CARD_STATE_CMD,
1265 .len = sizeof(u32),
1266 .data = &flags,
1267 .meta.flags = meta_flag,
1268 };
1269
1270 if (meta_flag & CMD_ASYNC)
1271 cmd.meta.u.callback = iwl_card_state_sync_callback;
1272
1273 return iwl_send_cmd(priv, &cmd);
1274 }
1275
1276 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1277 struct iwl_cmd *cmd, struct sk_buff *skb)
1278 {
1279 struct iwl_rx_packet *res = NULL;
1280
1281 if (!skb) {
1282 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1283 return 1;
1284 }
1285
1286 res = (struct iwl_rx_packet *)skb->data;
1287 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1288 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1289 res->hdr.flags);
1290 return 1;
1291 }
1292
1293 switch (res->u.add_sta.status) {
1294 case ADD_STA_SUCCESS_MSK:
1295 break;
1296 default:
1297 break;
1298 }
1299
1300 /* We didn't cache the SKB; let the caller free it */
1301 return 1;
1302 }
1303
1304 int iwl_send_add_station(struct iwl_priv *priv,
1305 struct iwl_addsta_cmd *sta, u8 flags)
1306 {
1307 struct iwl_rx_packet *res = NULL;
1308 int rc = 0;
1309 struct iwl_host_cmd cmd = {
1310 .id = REPLY_ADD_STA,
1311 .len = sizeof(struct iwl_addsta_cmd),
1312 .meta.flags = flags,
1313 .data = sta,
1314 };
1315
1316 if (flags & CMD_ASYNC)
1317 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1318 else
1319 cmd.meta.flags |= CMD_WANT_SKB;
1320
1321 rc = iwl_send_cmd(priv, &cmd);
1322
1323 if (rc || (flags & CMD_ASYNC))
1324 return rc;
1325
1326 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1327 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1328 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1329 res->hdr.flags);
1330 rc = -EIO;
1331 }
1332
1333 if (rc == 0) {
1334 switch (res->u.add_sta.status) {
1335 case ADD_STA_SUCCESS_MSK:
1336 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1337 break;
1338 default:
1339 rc = -EIO;
1340 IWL_WARNING("REPLY_ADD_STA failed\n");
1341 break;
1342 }
1343 }
1344
1345 priv->alloc_rxb_skb--;
1346 dev_kfree_skb_any(cmd.meta.u.skb);
1347
1348 return rc;
1349 }
1350
1351 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1352 struct ieee80211_key_conf *keyconf,
1353 u8 sta_id)
1354 {
1355 unsigned long flags;
1356 __le16 key_flags = 0;
1357
1358 switch (keyconf->alg) {
1359 case ALG_CCMP:
1360 key_flags |= STA_KEY_FLG_CCMP;
1361 key_flags |= cpu_to_le16(
1362 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1363 key_flags &= ~STA_KEY_FLG_INVALID;
1364 break;
1365 case ALG_TKIP:
1366 case ALG_WEP:
1367 return -EINVAL;
1368 default:
1369 return -EINVAL;
1370 }
1371 spin_lock_irqsave(&priv->sta_lock, flags);
1372 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1373 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1374 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1375 keyconf->keylen);
1376
1377 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1378 keyconf->keylen);
1379 priv->stations[sta_id].sta.key.key_flags = key_flags;
1380 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1381 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1382
1383 spin_unlock_irqrestore(&priv->sta_lock, flags);
1384
1385 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1386 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1387 return 0;
1388 }
1389
1390 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1391 {
1392 unsigned long flags;
1393
1394 spin_lock_irqsave(&priv->sta_lock, flags);
1395 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1396 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1397 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1398 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1399 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1400 spin_unlock_irqrestore(&priv->sta_lock, flags);
1401
1402 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1403 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1404 return 0;
1405 }
1406
1407 static void iwl_clear_free_frames(struct iwl_priv *priv)
1408 {
1409 struct list_head *element;
1410
1411 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1412 priv->frames_count);
1413
1414 while (!list_empty(&priv->free_frames)) {
1415 element = priv->free_frames.next;
1416 list_del(element);
1417 kfree(list_entry(element, struct iwl_frame, list));
1418 priv->frames_count--;
1419 }
1420
1421 if (priv->frames_count) {
1422 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1423 priv->frames_count);
1424 priv->frames_count = 0;
1425 }
1426 }
1427
1428 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1429 {
1430 struct iwl_frame *frame;
1431 struct list_head *element;
1432 if (list_empty(&priv->free_frames)) {
1433 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1434 if (!frame) {
1435 IWL_ERROR("Could not allocate frame!\n");
1436 return NULL;
1437 }
1438
1439 priv->frames_count++;
1440 return frame;
1441 }
1442
1443 element = priv->free_frames.next;
1444 list_del(element);
1445 return list_entry(element, struct iwl_frame, list);
1446 }
1447
1448 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1449 {
1450 memset(frame, 0, sizeof(*frame));
1451 list_add(&frame->list, &priv->free_frames);
1452 }
1453
1454 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1455 struct ieee80211_hdr *hdr,
1456 const u8 *dest, int left)
1457 {
1458
1459 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1460 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1461 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1462 return 0;
1463
1464 if (priv->ibss_beacon->len > left)
1465 return 0;
1466
1467 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1468
1469 return priv->ibss_beacon->len;
1470 }
1471
1472 static int iwl_rate_index_from_plcp(int plcp)
1473 {
1474 int i = 0;
1475
1476 for (i = 0; i < IWL_RATE_COUNT; i++)
1477 if (iwl_rates[i].plcp == plcp)
1478 return i;
1479 return -1;
1480 }
1481
1482 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1483 {
1484 u8 i;
1485
1486 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1487 i = iwl_rates[i].next_ieee) {
1488 if (rate_mask & (1 << i))
1489 return iwl_rates[i].plcp;
1490 }
1491
1492 return IWL_RATE_INVALID;
1493 }
1494
1495 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1496 {
1497 struct iwl_frame *frame;
1498 unsigned int frame_size;
1499 int rc;
1500 u8 rate;
1501
1502 frame = iwl_get_free_frame(priv);
1503
1504 if (!frame) {
1505 IWL_ERROR("Could not obtain free frame buffer for beacon "
1506 "command.\n");
1507 return -ENOMEM;
1508 }
1509
1510 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1511 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1512 0xFF0);
1513 if (rate == IWL_INVALID_RATE)
1514 rate = IWL_RATE_6M_PLCP;
1515 } else {
1516 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1517 if (rate == IWL_INVALID_RATE)
1518 rate = IWL_RATE_1M_PLCP;
1519 }
1520
1521 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1522
1523 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1524 &frame->u.cmd[0]);
1525
1526 iwl_free_frame(priv, frame);
1527
1528 return rc;
1529 }
1530
1531 /******************************************************************************
1532 *
1533 * EEPROM related functions
1534 *
1535 ******************************************************************************/
1536
1537 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1538 {
1539 memcpy(mac, priv->eeprom.mac_address, 6);
1540 }
1541
1542 /**
1543 * iwl_eeprom_init - read EEPROM contents
1544 *
1545 * Load the EEPROM from adapter into priv->eeprom
1546 *
1547 * NOTE: This routine uses the non-debug IO access functions.
1548 */
1549 int iwl_eeprom_init(struct iwl_priv *priv)
1550 {
1551 u16 *e = (u16 *)&priv->eeprom;
1552 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1553 u32 r;
1554 int sz = sizeof(priv->eeprom);
1555 int rc;
1556 int i;
1557 u16 addr;
1558
1559 /* The EEPROM structure has several padding buffers within it
1560 * and when adding new EEPROM maps is subject to programmer errors
1561 * which may be very difficult to identify without explicitly
1562 * checking the resulting size of the eeprom map. */
1563 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1564
1565 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1566 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1567 return -ENOENT;
1568 }
1569
1570 rc = iwl_eeprom_aqcuire_semaphore(priv);
1571 if (rc < 0) {
1572 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1573 return -ENOENT;
1574 }
1575
1576 /* eeprom is an array of 16bit values */
1577 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1578 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1579 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1580
1581 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1582 i += IWL_EEPROM_ACCESS_DELAY) {
1583 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1584 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1585 break;
1586 udelay(IWL_EEPROM_ACCESS_DELAY);
1587 }
1588
1589 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1590 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1591 return -ETIMEDOUT;
1592 }
1593 e[addr / 2] = le16_to_cpu(r >> 16);
1594 }
1595
1596 return 0;
1597 }
1598
1599 /******************************************************************************
1600 *
1601 * Misc. internal state and helper functions
1602 *
1603 ******************************************************************************/
1604 #ifdef CONFIG_IWLWIFI_DEBUG
1605
1606 /**
1607 * iwl_report_frame - dump frame to syslog during debug sessions
1608 *
1609 * hack this function to show different aspects of received frames,
1610 * including selective frame dumps.
1611 * group100 parameter selects whether to show 1 out of 100 good frames.
1612 *
1613 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1614 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1615 * is 3945-specific and gives bad output for 4965. Need to split the
1616 * functionality, keep common stuff here.
1617 */
1618 void iwl_report_frame(struct iwl_priv *priv,
1619 struct iwl_rx_packet *pkt,
1620 struct ieee80211_hdr *header, int group100)
1621 {
1622 u32 to_us;
1623 u32 print_summary = 0;
1624 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1625 u32 hundred = 0;
1626 u32 dataframe = 0;
1627 u16 fc;
1628 u16 seq_ctl;
1629 u16 channel;
1630 u16 phy_flags;
1631 int rate_sym;
1632 u16 length;
1633 u16 status;
1634 u16 bcn_tmr;
1635 u32 tsf_low;
1636 u64 tsf;
1637 u8 rssi;
1638 u8 agc;
1639 u16 sig_avg;
1640 u16 noise_diff;
1641 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1642 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1643 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1644 u8 *data = IWL_RX_DATA(pkt);
1645
1646 /* MAC header */
1647 fc = le16_to_cpu(header->frame_control);
1648 seq_ctl = le16_to_cpu(header->seq_ctrl);
1649
1650 /* metadata */
1651 channel = le16_to_cpu(rx_hdr->channel);
1652 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1653 rate_sym = rx_hdr->rate;
1654 length = le16_to_cpu(rx_hdr->len);
1655
1656 /* end-of-frame status and timestamp */
1657 status = le32_to_cpu(rx_end->status);
1658 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1659 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1660 tsf = le64_to_cpu(rx_end->timestamp);
1661
1662 /* signal statistics */
1663 rssi = rx_stats->rssi;
1664 agc = rx_stats->agc;
1665 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1666 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1667
1668 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1669
1670 /* if data frame is to us and all is good,
1671 * (optionally) print summary for only 1 out of every 100 */
1672 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1673 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1674 dataframe = 1;
1675 if (!group100)
1676 print_summary = 1; /* print each frame */
1677 else if (priv->framecnt_to_us < 100) {
1678 priv->framecnt_to_us++;
1679 print_summary = 0;
1680 } else {
1681 priv->framecnt_to_us = 0;
1682 print_summary = 1;
1683 hundred = 1;
1684 }
1685 } else {
1686 /* print summary for all other frames */
1687 print_summary = 1;
1688 }
1689
1690 if (print_summary) {
1691 char *title;
1692 u32 rate;
1693
1694 if (hundred)
1695 title = "100Frames";
1696 else if (fc & IEEE80211_FCTL_RETRY)
1697 title = "Retry";
1698 else if (ieee80211_is_assoc_response(fc))
1699 title = "AscRsp";
1700 else if (ieee80211_is_reassoc_response(fc))
1701 title = "RasRsp";
1702 else if (ieee80211_is_probe_response(fc)) {
1703 title = "PrbRsp";
1704 print_dump = 1; /* dump frame contents */
1705 } else if (ieee80211_is_beacon(fc)) {
1706 title = "Beacon";
1707 print_dump = 1; /* dump frame contents */
1708 } else if (ieee80211_is_atim(fc))
1709 title = "ATIM";
1710 else if (ieee80211_is_auth(fc))
1711 title = "Auth";
1712 else if (ieee80211_is_deauth(fc))
1713 title = "DeAuth";
1714 else if (ieee80211_is_disassoc(fc))
1715 title = "DisAssoc";
1716 else
1717 title = "Frame";
1718
1719 rate = iwl_rate_index_from_plcp(rate_sym);
1720 if (rate == -1)
1721 rate = 0;
1722 else
1723 rate = iwl_rates[rate].ieee / 2;
1724
1725 /* print frame summary.
1726 * MAC addresses show just the last byte (for brevity),
1727 * but you can hack it to show more, if you'd like to. */
1728 if (dataframe)
1729 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1730 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1731 title, fc, header->addr1[5],
1732 length, rssi, channel, rate);
1733 else {
1734 /* src/dst addresses assume managed mode */
1735 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1736 "src=0x%02x, rssi=%u, tim=%lu usec, "
1737 "phy=0x%02x, chnl=%d\n",
1738 title, fc, header->addr1[5],
1739 header->addr3[5], rssi,
1740 tsf_low - priv->scan_start_tsf,
1741 phy_flags, channel);
1742 }
1743 }
1744 if (print_dump)
1745 iwl_print_hex_dump(IWL_DL_RX, data, length);
1746 }
1747 #endif
1748
1749 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1750 {
1751 if (priv->hw_setting.shared_virt)
1752 pci_free_consistent(priv->pci_dev,
1753 sizeof(struct iwl_shared),
1754 priv->hw_setting.shared_virt,
1755 priv->hw_setting.shared_phys);
1756 }
1757
1758 /**
1759 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1760 *
1761 * return : set the bit for each supported rate insert in ie
1762 */
1763 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1764 u16 basic_rate, int max_count)
1765 {
1766 u16 ret_rates = 0, bit;
1767 int i;
1768 u8 *rates;
1769
1770 rates = &(ie[1]);
1771
1772 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1773 if (bit & supported_rate) {
1774 ret_rates |= bit;
1775 rates[*ie] = iwl_rates[i].ieee |
1776 ((bit & basic_rate) ? 0x80 : 0x00);
1777 *ie = *ie + 1;
1778 if (*ie >= max_count)
1779 break;
1780 }
1781 }
1782
1783 return ret_rates;
1784 }
1785
1786 /**
1787 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1788 */
1789 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1790 struct ieee80211_mgmt *frame,
1791 int left, int is_direct)
1792 {
1793 int len = 0;
1794 u8 *pos = NULL;
1795 u16 ret_rates;
1796
1797 /* Make sure there is enough space for the probe request,
1798 * two mandatory IEs and the data */
1799 left -= 24;
1800 if (left < 0)
1801 return 0;
1802 len += 24;
1803
1804 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1805 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1806 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1807 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1808 frame->seq_ctrl = 0;
1809
1810 /* fill in our indirect SSID IE */
1811 /* ...next IE... */
1812
1813 left -= 2;
1814 if (left < 0)
1815 return 0;
1816 len += 2;
1817 pos = &(frame->u.probe_req.variable[0]);
1818 *pos++ = WLAN_EID_SSID;
1819 *pos++ = 0;
1820
1821 /* fill in our direct SSID IE... */
1822 if (is_direct) {
1823 /* ...next IE... */
1824 left -= 2 + priv->essid_len;
1825 if (left < 0)
1826 return 0;
1827 /* ... fill it in... */
1828 *pos++ = WLAN_EID_SSID;
1829 *pos++ = priv->essid_len;
1830 memcpy(pos, priv->essid, priv->essid_len);
1831 pos += priv->essid_len;
1832 len += 2 + priv->essid_len;
1833 }
1834
1835 /* fill in supported rate */
1836 /* ...next IE... */
1837 left -= 2;
1838 if (left < 0)
1839 return 0;
1840 /* ... fill it in... */
1841 *pos++ = WLAN_EID_SUPP_RATES;
1842 *pos = 0;
1843 ret_rates = priv->active_rate = priv->rates_mask;
1844 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1845
1846 iwl_supported_rate_to_ie(pos, priv->active_rate,
1847 priv->active_rate_basic, left);
1848 len += 2 + *pos;
1849 pos += (*pos) + 1;
1850 ret_rates = ~ret_rates & priv->active_rate;
1851
1852 if (ret_rates == 0)
1853 goto fill_end;
1854
1855 /* fill in supported extended rate */
1856 /* ...next IE... */
1857 left -= 2;
1858 if (left < 0)
1859 return 0;
1860 /* ... fill it in... */
1861 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1862 *pos = 0;
1863 iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1864 if (*pos > 0)
1865 len += 2 + *pos;
1866
1867 fill_end:
1868 return (u16)len;
1869 }
1870
1871 /*
1872 * QoS support
1873 */
1874 #ifdef CONFIG_IWLWIFI_QOS
1875 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1876 struct iwl_qosparam_cmd *qos)
1877 {
1878
1879 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1880 sizeof(struct iwl_qosparam_cmd), qos);
1881 }
1882
1883 static void iwl_reset_qos(struct iwl_priv *priv)
1884 {
1885 u16 cw_min = 15;
1886 u16 cw_max = 1023;
1887 u8 aifs = 2;
1888 u8 is_legacy = 0;
1889 unsigned long flags;
1890 int i;
1891
1892 spin_lock_irqsave(&priv->lock, flags);
1893 priv->qos_data.qos_active = 0;
1894
1895 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1896 if (priv->qos_data.qos_enable)
1897 priv->qos_data.qos_active = 1;
1898 if (!(priv->active_rate & 0xfff0)) {
1899 cw_min = 31;
1900 is_legacy = 1;
1901 }
1902 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1903 if (priv->qos_data.qos_enable)
1904 priv->qos_data.qos_active = 1;
1905 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1906 cw_min = 31;
1907 is_legacy = 1;
1908 }
1909
1910 if (priv->qos_data.qos_active)
1911 aifs = 3;
1912
1913 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1914 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1915 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1916 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1917 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1918
1919 if (priv->qos_data.qos_active) {
1920 i = 1;
1921 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1922 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1923 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1924 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1925 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1926
1927 i = 2;
1928 priv->qos_data.def_qos_parm.ac[i].cw_min =
1929 cpu_to_le16((cw_min + 1) / 2 - 1);
1930 priv->qos_data.def_qos_parm.ac[i].cw_max =
1931 cpu_to_le16(cw_max);
1932 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1933 if (is_legacy)
1934 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1935 cpu_to_le16(6016);
1936 else
1937 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1938 cpu_to_le16(3008);
1939 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1940
1941 i = 3;
1942 priv->qos_data.def_qos_parm.ac[i].cw_min =
1943 cpu_to_le16((cw_min + 1) / 4 - 1);
1944 priv->qos_data.def_qos_parm.ac[i].cw_max =
1945 cpu_to_le16((cw_max + 1) / 2 - 1);
1946 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1947 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1948 if (is_legacy)
1949 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1950 cpu_to_le16(3264);
1951 else
1952 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1953 cpu_to_le16(1504);
1954 } else {
1955 for (i = 1; i < 4; i++) {
1956 priv->qos_data.def_qos_parm.ac[i].cw_min =
1957 cpu_to_le16(cw_min);
1958 priv->qos_data.def_qos_parm.ac[i].cw_max =
1959 cpu_to_le16(cw_max);
1960 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1961 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1962 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1963 }
1964 }
1965 IWL_DEBUG_QOS("set QoS to default \n");
1966
1967 spin_unlock_irqrestore(&priv->lock, flags);
1968 }
1969
1970 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1971 {
1972 unsigned long flags;
1973
1974 if (priv == NULL)
1975 return;
1976
1977 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1978 return;
1979
1980 if (!priv->qos_data.qos_enable)
1981 return;
1982
1983 spin_lock_irqsave(&priv->lock, flags);
1984 priv->qos_data.def_qos_parm.qos_flags = 0;
1985
1986 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1987 !priv->qos_data.qos_cap.q_AP.txop_request)
1988 priv->qos_data.def_qos_parm.qos_flags |=
1989 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1990
1991 if (priv->qos_data.qos_active)
1992 priv->qos_data.def_qos_parm.qos_flags |=
1993 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1994
1995 spin_unlock_irqrestore(&priv->lock, flags);
1996
1997 if (force || iwl_is_associated(priv)) {
1998 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1999 priv->qos_data.qos_active);
2000
2001 iwl_send_qos_params_command(priv,
2002 &(priv->qos_data.def_qos_parm));
2003 }
2004 }
2005
2006 #endif /* CONFIG_IWLWIFI_QOS */
2007 /*
2008 * Power management (not Tx power!) functions
2009 */
2010 #define MSEC_TO_USEC 1024
2011
2012 #define NOSLP __constant_cpu_to_le32(0)
2013 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2014 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2015 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2016 __constant_cpu_to_le32(X1), \
2017 __constant_cpu_to_le32(X2), \
2018 __constant_cpu_to_le32(X3), \
2019 __constant_cpu_to_le32(X4)}
2020
2021
2022 /* default power management (not Tx power) table values */
2023 /* for tim 0-10 */
2024 static struct iwl_power_vec_entry range_0[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), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2027 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2028 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2029 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2030 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2031 };
2032
2033 /* for tim > 10 */
2034 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2035 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2036 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2037 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2038 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2039 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2040 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2041 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2042 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2043 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2044 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2045 };
2046
2047 int iwl_power_init_handle(struct iwl_priv *priv)
2048 {
2049 int rc = 0, i;
2050 struct iwl_power_mgr *pow_data;
2051 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2052 u16 pci_pm;
2053
2054 IWL_DEBUG_POWER("Initialize power \n");
2055
2056 pow_data = &(priv->power_data);
2057
2058 memset(pow_data, 0, sizeof(*pow_data));
2059
2060 pow_data->active_index = IWL_POWER_RANGE_0;
2061 pow_data->dtim_val = 0xffff;
2062
2063 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2064 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2065
2066 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2067 if (rc != 0)
2068 return 0;
2069 else {
2070 struct iwl_powertable_cmd *cmd;
2071
2072 IWL_DEBUG_POWER("adjust power command flags\n");
2073
2074 for (i = 0; i < IWL_POWER_AC; i++) {
2075 cmd = &pow_data->pwr_range_0[i].cmd;
2076
2077 if (pci_pm & 0x1)
2078 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2079 else
2080 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2081 }
2082 }
2083 return rc;
2084 }
2085
2086 static int iwl_update_power_cmd(struct iwl_priv *priv,
2087 struct iwl_powertable_cmd *cmd, u32 mode)
2088 {
2089 int rc = 0, i;
2090 u8 skip;
2091 u32 max_sleep = 0;
2092 struct iwl_power_vec_entry *range;
2093 u8 period = 0;
2094 struct iwl_power_mgr *pow_data;
2095
2096 if (mode > IWL_POWER_INDEX_5) {
2097 IWL_DEBUG_POWER("Error invalid power mode \n");
2098 return -1;
2099 }
2100 pow_data = &(priv->power_data);
2101
2102 if (pow_data->active_index == IWL_POWER_RANGE_0)
2103 range = &pow_data->pwr_range_0[0];
2104 else
2105 range = &pow_data->pwr_range_1[1];
2106
2107 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2108
2109 #ifdef IWL_MAC80211_DISABLE
2110 if (priv->assoc_network != NULL) {
2111 unsigned long flags;
2112
2113 period = priv->assoc_network->tim.tim_period;
2114 }
2115 #endif /*IWL_MAC80211_DISABLE */
2116 skip = range[mode].no_dtim;
2117
2118 if (period == 0) {
2119 period = 1;
2120 skip = 0;
2121 }
2122
2123 if (skip == 0) {
2124 max_sleep = period;
2125 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2126 } else {
2127 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2128 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2129 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2130 }
2131
2132 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2133 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2134 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2135 }
2136
2137 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2138 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2139 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2140 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2141 le32_to_cpu(cmd->sleep_interval[0]),
2142 le32_to_cpu(cmd->sleep_interval[1]),
2143 le32_to_cpu(cmd->sleep_interval[2]),
2144 le32_to_cpu(cmd->sleep_interval[3]),
2145 le32_to_cpu(cmd->sleep_interval[4]));
2146
2147 return rc;
2148 }
2149
2150 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2151 {
2152 u32 final_mode = mode;
2153 int rc;
2154 struct iwl_powertable_cmd cmd;
2155
2156 /* If on battery, set to 3,
2157 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2158 * else user level */
2159 switch (mode) {
2160 case IWL_POWER_BATTERY:
2161 final_mode = IWL_POWER_INDEX_3;
2162 break;
2163 case IWL_POWER_AC:
2164 final_mode = IWL_POWER_MODE_CAM;
2165 break;
2166 default:
2167 final_mode = mode;
2168 break;
2169 }
2170
2171 iwl_update_power_cmd(priv, &cmd, final_mode);
2172
2173 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2174
2175 if (final_mode == IWL_POWER_MODE_CAM)
2176 clear_bit(STATUS_POWER_PMI, &priv->status);
2177 else
2178 set_bit(STATUS_POWER_PMI, &priv->status);
2179
2180 return rc;
2181 }
2182
2183 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2184 {
2185 /* Filter incoming packets to determine if they are targeted toward
2186 * this network, discarding packets coming from ourselves */
2187 switch (priv->iw_mode) {
2188 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2189 /* packets from our adapter are dropped (echo) */
2190 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2191 return 0;
2192 /* {broad,multi}cast packets to our IBSS go through */
2193 if (is_multicast_ether_addr(header->addr1))
2194 return !compare_ether_addr(header->addr3, priv->bssid);
2195 /* packets to our adapter go through */
2196 return !compare_ether_addr(header->addr1, priv->mac_addr);
2197 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2198 /* packets from our adapter are dropped (echo) */
2199 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2200 return 0;
2201 /* {broad,multi}cast packets to our BSS go through */
2202 if (is_multicast_ether_addr(header->addr1))
2203 return !compare_ether_addr(header->addr2, priv->bssid);
2204 /* packets to our adapter go through */
2205 return !compare_ether_addr(header->addr1, priv->mac_addr);
2206 }
2207
2208 return 1;
2209 }
2210
2211 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2212
2213 const char *iwl_get_tx_fail_reason(u32 status)
2214 {
2215 switch (status & TX_STATUS_MSK) {
2216 case TX_STATUS_SUCCESS:
2217 return "SUCCESS";
2218 TX_STATUS_ENTRY(SHORT_LIMIT);
2219 TX_STATUS_ENTRY(LONG_LIMIT);
2220 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2221 TX_STATUS_ENTRY(MGMNT_ABORT);
2222 TX_STATUS_ENTRY(NEXT_FRAG);
2223 TX_STATUS_ENTRY(LIFE_EXPIRE);
2224 TX_STATUS_ENTRY(DEST_PS);
2225 TX_STATUS_ENTRY(ABORTED);
2226 TX_STATUS_ENTRY(BT_RETRY);
2227 TX_STATUS_ENTRY(STA_INVALID);
2228 TX_STATUS_ENTRY(FRAG_DROPPED);
2229 TX_STATUS_ENTRY(TID_DISABLE);
2230 TX_STATUS_ENTRY(FRAME_FLUSHED);
2231 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2232 TX_STATUS_ENTRY(TX_LOCKED);
2233 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2234 }
2235
2236 return "UNKNOWN";
2237 }
2238
2239 /**
2240 * iwl_scan_cancel - Cancel any currently executing HW scan
2241 *
2242 * NOTE: priv->mutex is not required before calling this function
2243 */
2244 static int iwl_scan_cancel(struct iwl_priv *priv)
2245 {
2246 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2247 clear_bit(STATUS_SCANNING, &priv->status);
2248 return 0;
2249 }
2250
2251 if (test_bit(STATUS_SCANNING, &priv->status)) {
2252 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2253 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2254 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2255 queue_work(priv->workqueue, &priv->abort_scan);
2256
2257 } else
2258 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2259
2260 return test_bit(STATUS_SCANNING, &priv->status);
2261 }
2262
2263 return 0;
2264 }
2265
2266 /**
2267 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2268 * @ms: amount of time to wait (in milliseconds) for scan to abort
2269 *
2270 * NOTE: priv->mutex must be held before calling this function
2271 */
2272 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2273 {
2274 unsigned long now = jiffies;
2275 int ret;
2276
2277 ret = iwl_scan_cancel(priv);
2278 if (ret && ms) {
2279 mutex_unlock(&priv->mutex);
2280 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2281 test_bit(STATUS_SCANNING, &priv->status))
2282 msleep(1);
2283 mutex_lock(&priv->mutex);
2284
2285 return test_bit(STATUS_SCANNING, &priv->status);
2286 }
2287
2288 return ret;
2289 }
2290
2291 static void iwl_sequence_reset(struct iwl_priv *priv)
2292 {
2293 /* Reset ieee stats */
2294
2295 /* We don't reset the net_device_stats (ieee->stats) on
2296 * re-association */
2297
2298 priv->last_seq_num = -1;
2299 priv->last_frag_num = -1;
2300 priv->last_packet_time = 0;
2301
2302 iwl_scan_cancel(priv);
2303 }
2304
2305 #define MAX_UCODE_BEACON_INTERVAL 1024
2306 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2307
2308 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2309 {
2310 u16 new_val = 0;
2311 u16 beacon_factor = 0;
2312
2313 beacon_factor =
2314 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2315 / MAX_UCODE_BEACON_INTERVAL;
2316 new_val = beacon_val / beacon_factor;
2317
2318 return cpu_to_le16(new_val);
2319 }
2320
2321 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2322 {
2323 u64 interval_tm_unit;
2324 u64 tsf, result;
2325 unsigned long flags;
2326 struct ieee80211_conf *conf = NULL;
2327 u16 beacon_int = 0;
2328
2329 conf = ieee80211_get_hw_conf(priv->hw);
2330
2331 spin_lock_irqsave(&priv->lock, flags);
2332 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2333 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2334
2335 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2336
2337 tsf = priv->timestamp1;
2338 tsf = ((tsf << 32) | priv->timestamp0);
2339
2340 beacon_int = priv->beacon_int;
2341 spin_unlock_irqrestore(&priv->lock, flags);
2342
2343 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2344 if (beacon_int == 0) {
2345 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2346 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2347 } else {
2348 priv->rxon_timing.beacon_interval =
2349 cpu_to_le16(beacon_int);
2350 priv->rxon_timing.beacon_interval =
2351 iwl_adjust_beacon_interval(
2352 le16_to_cpu(priv->rxon_timing.beacon_interval));
2353 }
2354
2355 priv->rxon_timing.atim_window = 0;
2356 } else {
2357 priv->rxon_timing.beacon_interval =
2358 iwl_adjust_beacon_interval(conf->beacon_int);
2359 /* TODO: we need to get atim_window from upper stack
2360 * for now we set to 0 */
2361 priv->rxon_timing.atim_window = 0;
2362 }
2363
2364 interval_tm_unit =
2365 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2366 result = do_div(tsf, interval_tm_unit);
2367 priv->rxon_timing.beacon_init_val =
2368 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2369
2370 IWL_DEBUG_ASSOC
2371 ("beacon interval %d beacon timer %d beacon tim %d\n",
2372 le16_to_cpu(priv->rxon_timing.beacon_interval),
2373 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2374 le16_to_cpu(priv->rxon_timing.atim_window));
2375 }
2376
2377 static int iwl_scan_initiate(struct iwl_priv *priv)
2378 {
2379 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2380 IWL_ERROR("APs don't scan.\n");
2381 return 0;
2382 }
2383
2384 if (!iwl_is_ready_rf(priv)) {
2385 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2386 return -EIO;
2387 }
2388
2389 if (test_bit(STATUS_SCANNING, &priv->status)) {
2390 IWL_DEBUG_SCAN("Scan already in progress.\n");
2391 return -EAGAIN;
2392 }
2393
2394 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2395 IWL_DEBUG_SCAN("Scan request while abort pending. "
2396 "Queuing.\n");
2397 return -EAGAIN;
2398 }
2399
2400 IWL_DEBUG_INFO("Starting scan...\n");
2401 priv->scan_bands = 2;
2402 set_bit(STATUS_SCANNING, &priv->status);
2403 priv->scan_start = jiffies;
2404 priv->scan_pass_start = priv->scan_start;
2405
2406 queue_work(priv->workqueue, &priv->request_scan);
2407
2408 return 0;
2409 }
2410
2411 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2412 {
2413 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2414
2415 if (hw_decrypt)
2416 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2417 else
2418 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2419
2420 return 0;
2421 }
2422
2423 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2424 {
2425 if (phymode == MODE_IEEE80211A) {
2426 priv->staging_rxon.flags &=
2427 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2428 | RXON_FLG_CCK_MSK);
2429 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2430 } else {
2431 /* Copied from iwl_bg_post_associate() */
2432 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2433 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2434 else
2435 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2436
2437 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2438 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2439
2440 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2441 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2442 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2443 }
2444 }
2445
2446 /*
2447 * initilize rxon structure with default values fromm eeprom
2448 */
2449 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2450 {
2451 const struct iwl_channel_info *ch_info;
2452
2453 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2454
2455 switch (priv->iw_mode) {
2456 case IEEE80211_IF_TYPE_AP:
2457 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2458 break;
2459
2460 case IEEE80211_IF_TYPE_STA:
2461 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2462 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2463 break;
2464
2465 case IEEE80211_IF_TYPE_IBSS:
2466 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2467 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2468 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2469 RXON_FILTER_ACCEPT_GRP_MSK;
2470 break;
2471
2472 case IEEE80211_IF_TYPE_MNTR:
2473 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2474 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2475 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2476 break;
2477 }
2478
2479 #if 0
2480 /* TODO: Figure out when short_preamble would be set and cache from
2481 * that */
2482 if (!hw_to_local(priv->hw)->short_preamble)
2483 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2484 else
2485 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2486 #endif
2487
2488 ch_info = iwl_get_channel_info(priv, priv->phymode,
2489 le16_to_cpu(priv->staging_rxon.channel));
2490
2491 if (!ch_info)
2492 ch_info = &priv->channel_info[0];
2493
2494 /*
2495 * in some case A channels are all non IBSS
2496 * in this case force B/G channel
2497 */
2498 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2499 !(is_channel_ibss(ch_info)))
2500 ch_info = &priv->channel_info[0];
2501
2502 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2503 if (is_channel_a_band(ch_info))
2504 priv->phymode = MODE_IEEE80211A;
2505 else
2506 priv->phymode = MODE_IEEE80211G;
2507
2508 iwl_set_flags_for_phymode(priv, priv->phymode);
2509
2510 priv->staging_rxon.ofdm_basic_rates =
2511 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2512 priv->staging_rxon.cck_basic_rates =
2513 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2514 }
2515
2516 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2517 {
2518 if (!iwl_is_ready_rf(priv))
2519 return -EAGAIN;
2520
2521 if (mode == IEEE80211_IF_TYPE_IBSS) {
2522 const struct iwl_channel_info *ch_info;
2523
2524 ch_info = iwl_get_channel_info(priv,
2525 priv->phymode,
2526 le16_to_cpu(priv->staging_rxon.channel));
2527
2528 if (!ch_info || !is_channel_ibss(ch_info)) {
2529 IWL_ERROR("channel %d not IBSS channel\n",
2530 le16_to_cpu(priv->staging_rxon.channel));
2531 return -EINVAL;
2532 }
2533 }
2534
2535 cancel_delayed_work(&priv->scan_check);
2536 if (iwl_scan_cancel_timeout(priv, 100)) {
2537 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2538 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2539 return -EAGAIN;
2540 }
2541
2542 priv->iw_mode = mode;
2543
2544 iwl_connection_init_rx_config(priv);
2545 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2546
2547 iwl_clear_stations_table(priv);
2548
2549 iwl_commit_rxon(priv);
2550
2551 return 0;
2552 }
2553
2554 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2555 struct ieee80211_tx_control *ctl,
2556 struct iwl_cmd *cmd,
2557 struct sk_buff *skb_frag,
2558 int last_frag)
2559 {
2560 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2561
2562 switch (keyinfo->alg) {
2563 case ALG_CCMP:
2564 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2565 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2566 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2567 break;
2568
2569 case ALG_TKIP:
2570 #if 0
2571 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2572
2573 if (last_frag)
2574 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2575 8);
2576 else
2577 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2578 #endif
2579 break;
2580
2581 case ALG_WEP:
2582 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2583 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2584
2585 if (keyinfo->keylen == 13)
2586 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2587
2588 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2589
2590 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2591 "with key %d\n", ctl->key_idx);
2592 break;
2593
2594 case ALG_NONE:
2595 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2596 break;
2597
2598 default:
2599 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2600 break;
2601 }
2602 }
2603
2604 /*
2605 * handle build REPLY_TX command notification.
2606 */
2607 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2608 struct iwl_cmd *cmd,
2609 struct ieee80211_tx_control *ctrl,
2610 struct ieee80211_hdr *hdr,
2611 int is_unicast, u8 std_id)
2612 {
2613 __le16 *qc;
2614 u16 fc = le16_to_cpu(hdr->frame_control);
2615 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2616
2617 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2618 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2619 tx_flags |= TX_CMD_FLG_ACK_MSK;
2620 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2621 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2622 if (ieee80211_is_probe_response(fc) &&
2623 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2624 tx_flags |= TX_CMD_FLG_TSF_MSK;
2625 } else {
2626 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2627 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2628 }
2629
2630 cmd->cmd.tx.sta_id = std_id;
2631 if (ieee80211_get_morefrag(hdr))
2632 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2633
2634 qc = ieee80211_get_qos_ctrl(hdr);
2635 if (qc) {
2636 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2637 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2638 } else
2639 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2640
2641 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2642 tx_flags |= TX_CMD_FLG_RTS_MSK;
2643 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2644 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2645 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2646 tx_flags |= TX_CMD_FLG_CTS_MSK;
2647 }
2648
2649 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2650 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2651
2652 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2653 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2654 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2655 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2656 cmd->cmd.tx.timeout.pm_frame_timeout =
2657 cpu_to_le16(3);
2658 else
2659 cmd->cmd.tx.timeout.pm_frame_timeout =
2660 cpu_to_le16(2);
2661 } else
2662 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2663
2664 cmd->cmd.tx.driver_txop = 0;
2665 cmd->cmd.tx.tx_flags = tx_flags;
2666 cmd->cmd.tx.next_frame_len = 0;
2667 }
2668
2669 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2670 {
2671 int sta_id;
2672 u16 fc = le16_to_cpu(hdr->frame_control);
2673
2674 /* If this frame is broadcast or not data then use the broadcast
2675 * station id */
2676 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2677 is_multicast_ether_addr(hdr->addr1))
2678 return priv->hw_setting.bcast_sta_id;
2679
2680 switch (priv->iw_mode) {
2681
2682 /* If this frame is part of a BSS network (we're a station), then
2683 * we use the AP's station id */
2684 case IEEE80211_IF_TYPE_STA:
2685 return IWL_AP_ID;
2686
2687 /* If we are an AP, then find the station, or use BCAST */
2688 case IEEE80211_IF_TYPE_AP:
2689 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2690 if (sta_id != IWL_INVALID_STATION)
2691 return sta_id;
2692 return priv->hw_setting.bcast_sta_id;
2693
2694 /* If this frame is part of a IBSS network, then we use the
2695 * target specific station id */
2696 case IEEE80211_IF_TYPE_IBSS:
2697 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2698 if (sta_id != IWL_INVALID_STATION)
2699 return sta_id;
2700
2701 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2702
2703 if (sta_id != IWL_INVALID_STATION)
2704 return sta_id;
2705
2706 IWL_DEBUG_DROP("Station " MAC_FMT " not in station map. "
2707 "Defaulting to broadcast...\n",
2708 MAC_ARG(hdr->addr1));
2709 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2710 return priv->hw_setting.bcast_sta_id;
2711
2712 default:
2713 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2714 return priv->hw_setting.bcast_sta_id;
2715 }
2716 }
2717
2718 /*
2719 * start REPLY_TX command process
2720 */
2721 static int iwl_tx_skb(struct iwl_priv *priv,
2722 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2723 {
2724 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2725 struct iwl_tfd_frame *tfd;
2726 u32 *control_flags;
2727 int txq_id = ctl->queue;
2728 struct iwl_tx_queue *txq = NULL;
2729 struct iwl_queue *q = NULL;
2730 dma_addr_t phys_addr;
2731 dma_addr_t txcmd_phys;
2732 struct iwl_cmd *out_cmd = NULL;
2733 u16 len, idx, len_org;
2734 u8 id, hdr_len, unicast;
2735 u8 sta_id;
2736 u16 seq_number = 0;
2737 u16 fc;
2738 __le16 *qc;
2739 u8 wait_write_ptr = 0;
2740 unsigned long flags;
2741 int rc;
2742
2743 spin_lock_irqsave(&priv->lock, flags);
2744 if (iwl_is_rfkill(priv)) {
2745 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2746 goto drop_unlock;
2747 }
2748
2749 if (!priv->interface_id) {
2750 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2751 goto drop_unlock;
2752 }
2753
2754 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2755 IWL_ERROR("ERROR: No TX rate available.\n");
2756 goto drop_unlock;
2757 }
2758
2759 unicast = !is_multicast_ether_addr(hdr->addr1);
2760 id = 0;
2761
2762 fc = le16_to_cpu(hdr->frame_control);
2763
2764 #ifdef CONFIG_IWLWIFI_DEBUG
2765 if (ieee80211_is_auth(fc))
2766 IWL_DEBUG_TX("Sending AUTH frame\n");
2767 else if (ieee80211_is_assoc_request(fc))
2768 IWL_DEBUG_TX("Sending ASSOC frame\n");
2769 else if (ieee80211_is_reassoc_request(fc))
2770 IWL_DEBUG_TX("Sending REASSOC frame\n");
2771 #endif
2772
2773 if (!iwl_is_associated(priv) &&
2774 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2775 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2776 goto drop_unlock;
2777 }
2778
2779 spin_unlock_irqrestore(&priv->lock, flags);
2780
2781 hdr_len = ieee80211_get_hdrlen(fc);
2782 sta_id = iwl_get_sta_id(priv, hdr);
2783 if (sta_id == IWL_INVALID_STATION) {
2784 IWL_DEBUG_DROP("Dropping - INVALID STATION: " MAC_FMT "\n",
2785 MAC_ARG(hdr->addr1));
2786 goto drop;
2787 }
2788
2789 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2790
2791 qc = ieee80211_get_qos_ctrl(hdr);
2792 if (qc) {
2793 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2794 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2795 IEEE80211_SCTL_SEQ;
2796 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2797 (hdr->seq_ctrl &
2798 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2799 seq_number += 0x10;
2800 }
2801 txq = &priv->txq[txq_id];
2802 q = &txq->q;
2803
2804 spin_lock_irqsave(&priv->lock, flags);
2805
2806 tfd = &txq->bd[q->first_empty];
2807 memset(tfd, 0, sizeof(*tfd));
2808 control_flags = (u32 *) tfd;
2809 idx = get_cmd_index(q, q->first_empty, 0);
2810
2811 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2812 txq->txb[q->first_empty].skb[0] = skb;
2813 memcpy(&(txq->txb[q->first_empty].status.control),
2814 ctl, sizeof(struct ieee80211_tx_control));
2815 out_cmd = &txq->cmd[idx];
2816 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2817 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2818 out_cmd->hdr.cmd = REPLY_TX;
2819 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2820 INDEX_TO_SEQ(q->first_empty)));
2821 /* copy frags header */
2822 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2823
2824 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2825 len = priv->hw_setting.tx_cmd_len +
2826 sizeof(struct iwl_cmd_header) + hdr_len;
2827
2828 len_org = len;
2829 len = (len + 3) & ~3;
2830
2831 if (len_org != len)
2832 len_org = 1;
2833 else
2834 len_org = 0;
2835
2836 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2837 offsetof(struct iwl_cmd, hdr);
2838
2839 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2840
2841 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2842 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2843
2844 /* 802.11 null functions have no payload... */
2845 len = skb->len - hdr_len;
2846 if (len) {
2847 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2848 len, PCI_DMA_TODEVICE);
2849 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2850 }
2851
2852 /* If there is no payload, then only one TFD is used */
2853 if (!len)
2854 *control_flags = TFD_CTL_COUNT_SET(1);
2855 else
2856 *control_flags = TFD_CTL_COUNT_SET(2) |
2857 TFD_CTL_PAD_SET(U32_PAD(len));
2858
2859 len = (u16)skb->len;
2860 out_cmd->cmd.tx.len = cpu_to_le16(len);
2861
2862 /* TODO need this for burst mode later on */
2863 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2864
2865 /* set is_hcca to 0; it probably will never be implemented */
2866 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2867
2868 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2869 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2870
2871 if (!ieee80211_get_morefrag(hdr)) {
2872 txq->need_update = 1;
2873 if (qc) {
2874 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2875 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2876 }
2877 } else {
2878 wait_write_ptr = 1;
2879 txq->need_update = 0;
2880 }
2881
2882 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2883 sizeof(out_cmd->cmd.tx));
2884
2885 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2886 ieee80211_get_hdrlen(fc));
2887
2888 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2889 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2890 spin_unlock_irqrestore(&priv->lock, flags);
2891
2892 if (rc)
2893 return rc;
2894
2895 if ((iwl_queue_space(q) < q->high_mark)
2896 && priv->mac80211_registered) {
2897 if (wait_write_ptr) {
2898 spin_lock_irqsave(&priv->lock, flags);
2899 txq->need_update = 1;
2900 iwl_tx_queue_update_write_ptr(priv, txq);
2901 spin_unlock_irqrestore(&priv->lock, flags);
2902 }
2903
2904 ieee80211_stop_queue(priv->hw, ctl->queue);
2905 }
2906
2907 return 0;
2908
2909 drop_unlock:
2910 spin_unlock_irqrestore(&priv->lock, flags);
2911 drop:
2912 return -1;
2913 }
2914
2915 static void iwl_set_rate(struct iwl_priv *priv)
2916 {
2917 const struct ieee80211_hw_mode *hw = NULL;
2918 struct ieee80211_rate *rate;
2919 int i;
2920
2921 hw = iwl_get_hw_mode(priv, priv->phymode);
2922
2923 priv->active_rate = 0;
2924 priv->active_rate_basic = 0;
2925
2926 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2927 hw->mode == MODE_IEEE80211A ?
2928 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2929
2930 for (i = 0; i < hw->num_rates; i++) {
2931 rate = &(hw->rates[i]);
2932 if ((rate->val < IWL_RATE_COUNT) &&
2933 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2934 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2935 rate->val, iwl_rates[rate->val].plcp,
2936 (rate->flags & IEEE80211_RATE_BASIC) ?
2937 "*" : "");
2938 priv->active_rate |= (1 << rate->val);
2939 if (rate->flags & IEEE80211_RATE_BASIC)
2940 priv->active_rate_basic |= (1 << rate->val);
2941 } else
2942 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2943 rate->val, iwl_rates[rate->val].plcp);
2944 }
2945
2946 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2947 priv->active_rate, priv->active_rate_basic);
2948
2949 /*
2950 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2951 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2952 * OFDM
2953 */
2954 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2955 priv->staging_rxon.cck_basic_rates =
2956 ((priv->active_rate_basic &
2957 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2958 else
2959 priv->staging_rxon.cck_basic_rates =
2960 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2961
2962 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2963 priv->staging_rxon.ofdm_basic_rates =
2964 ((priv->active_rate_basic &
2965 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2966 IWL_FIRST_OFDM_RATE) & 0xFF;
2967 else
2968 priv->staging_rxon.ofdm_basic_rates =
2969 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2970 }
2971
2972 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2973 {
2974 unsigned long flags;
2975
2976 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2977 return;
2978
2979 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2980 disable_radio ? "OFF" : "ON");
2981
2982 if (disable_radio) {
2983 iwl_scan_cancel(priv);
2984 /* FIXME: This is a workaround for AP */
2985 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2986 spin_lock_irqsave(&priv->lock, flags);
2987 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2988 CSR_UCODE_SW_BIT_RFKILL);
2989 spin_unlock_irqrestore(&priv->lock, flags);
2990 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2991 set_bit(STATUS_RF_KILL_SW, &priv->status);
2992 }
2993 return;
2994 }
2995
2996 spin_lock_irqsave(&priv->lock, flags);
2997 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2998
2999 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3000 spin_unlock_irqrestore(&priv->lock, flags);
3001
3002 /* wake up ucode */
3003 msleep(10);
3004
3005 spin_lock_irqsave(&priv->lock, flags);
3006 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3007 if (!iwl_grab_restricted_access(priv))
3008 iwl_release_restricted_access(priv);
3009 spin_unlock_irqrestore(&priv->lock, flags);
3010
3011 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3012 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3013 "disabled by HW switch\n");
3014 return;
3015 }
3016
3017 queue_work(priv->workqueue, &priv->restart);
3018 return;
3019 }
3020
3021 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3022 u32 decrypt_res, struct ieee80211_rx_status *stats)
3023 {
3024 u16 fc =
3025 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3026
3027 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3028 return;
3029
3030 if (!(fc & IEEE80211_FCTL_PROTECTED))
3031 return;
3032
3033 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3034 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3035 case RX_RES_STATUS_SEC_TYPE_TKIP:
3036 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3037 RX_RES_STATUS_BAD_ICV_MIC)
3038 stats->flag |= RX_FLAG_MMIC_ERROR;
3039 case RX_RES_STATUS_SEC_TYPE_WEP:
3040 case RX_RES_STATUS_SEC_TYPE_CCMP:
3041 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3042 RX_RES_STATUS_DECRYPT_OK) {
3043 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3044 stats->flag |= RX_FLAG_DECRYPTED;
3045 }
3046 break;
3047
3048 default:
3049 break;
3050 }
3051 }
3052
3053 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3054 struct iwl_rx_mem_buffer *rxb,
3055 void *data, short len,
3056 struct ieee80211_rx_status *stats,
3057 u16 phy_flags)
3058 {
3059 struct iwl_rt_rx_hdr *iwl_rt;
3060
3061 /* First cache any information we need before we overwrite
3062 * the information provided in the skb from the hardware */
3063 s8 signal = stats->ssi;
3064 s8 noise = 0;
3065 int rate = stats->rate;
3066 u64 tsf = stats->mactime;
3067 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3068
3069 /* We received data from the HW, so stop the watchdog */
3070 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3071 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3072 return;
3073 }
3074
3075 /* copy the frame data to write after where the radiotap header goes */
3076 iwl_rt = (void *)rxb->skb->data;
3077 memmove(iwl_rt->payload, data, len);
3078
3079 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3080 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3081
3082 /* total header + data */
3083 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3084
3085 /* Set the size of the skb to the size of the frame */
3086 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3087
3088 /* Big bitfield of all the fields we provide in radiotap */
3089 iwl_rt->rt_hdr.it_present =
3090 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3091 (1 << IEEE80211_RADIOTAP_FLAGS) |
3092 (1 << IEEE80211_RADIOTAP_RATE) |
3093 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3094 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3095 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3096 (1 << IEEE80211_RADIOTAP_ANTENNA));
3097
3098 /* Zero the flags, we'll add to them as we go */
3099 iwl_rt->rt_flags = 0;
3100
3101 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3102
3103 /* Convert to dBm */
3104 iwl_rt->rt_dbmsignal = signal;
3105 iwl_rt->rt_dbmnoise = noise;
3106
3107 /* Convert the channel frequency and set the flags */
3108 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3109 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3110 iwl_rt->rt_chbitmask =
3111 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3112 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3113 iwl_rt->rt_chbitmask =
3114 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3115 else /* 802.11g */
3116 iwl_rt->rt_chbitmask =
3117 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3118
3119 rate = iwl_rate_index_from_plcp(rate);
3120 if (rate == -1)
3121 iwl_rt->rt_rate = 0;
3122 else
3123 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3124
3125 /* antenna number */
3126 iwl_rt->rt_antenna =
3127 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3128
3129 /* set the preamble flag if we have it */
3130 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3131 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3132
3133 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3134
3135 stats->flag |= RX_FLAG_RADIOTAP;
3136 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3137 rxb->skb = NULL;
3138 }
3139
3140
3141 #define IWL_PACKET_RETRY_TIME HZ
3142
3143 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3144 {
3145 u16 sc = le16_to_cpu(header->seq_ctrl);
3146 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3147 u16 frag = sc & IEEE80211_SCTL_FRAG;
3148 u16 *last_seq, *last_frag;
3149 unsigned long *last_time;
3150
3151 switch (priv->iw_mode) {
3152 case IEEE80211_IF_TYPE_IBSS:{
3153 struct list_head *p;
3154 struct iwl_ibss_seq *entry = NULL;
3155 u8 *mac = header->addr2;
3156 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3157
3158 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3159 entry =
3160 list_entry(p, struct iwl_ibss_seq, list);
3161 if (!compare_ether_addr(entry->mac, mac))
3162 break;
3163 }
3164 if (p == &priv->ibss_mac_hash[index]) {
3165 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3166 if (!entry) {
3167 IWL_ERROR
3168 ("Cannot malloc new mac entry\n");
3169 return 0;
3170 }
3171 memcpy(entry->mac, mac, ETH_ALEN);
3172 entry->seq_num = seq;
3173 entry->frag_num = frag;
3174 entry->packet_time = jiffies;
3175 list_add(&entry->list,
3176 &priv->ibss_mac_hash[index]);
3177 return 0;
3178 }
3179 last_seq = &entry->seq_num;
3180 last_frag = &entry->frag_num;
3181 last_time = &entry->packet_time;
3182 break;
3183 }
3184 case IEEE80211_IF_TYPE_STA:
3185 last_seq = &priv->last_seq_num;
3186 last_frag = &priv->last_frag_num;
3187 last_time = &priv->last_packet_time;
3188 break;
3189 default:
3190 return 0;
3191 }
3192 if ((*last_seq == seq) &&
3193 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3194 if (*last_frag == frag)
3195 goto drop;
3196 if (*last_frag + 1 != frag)
3197 /* out-of-order fragment */
3198 goto drop;
3199 } else
3200 *last_seq = seq;
3201
3202 *last_frag = frag;
3203 *last_time = jiffies;
3204 return 0;
3205
3206 drop:
3207 return 1;
3208 }
3209
3210 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3211
3212 #include "iwl-spectrum.h"
3213
3214 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3215 #define BEACON_TIME_MASK_HIGH 0xFF000000
3216 #define TIME_UNIT 1024
3217
3218 /*
3219 * extended beacon time format
3220 * time in usec will be changed into a 32-bit value in 8:24 format
3221 * the high 1 byte is the beacon counts
3222 * the lower 3 bytes is the time in usec within one beacon interval
3223 */
3224
3225 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3226 {
3227 u32 quot;
3228 u32 rem;
3229 u32 interval = beacon_interval * 1024;
3230
3231 if (!interval || !usec)
3232 return 0;
3233
3234 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3235 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3236
3237 return (quot << 24) + rem;
3238 }
3239
3240 /* base is usually what we get from ucode with each received frame,
3241 * the same as HW timer counter counting down
3242 */
3243
3244 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3245 {
3246 u32 base_low = base & BEACON_TIME_MASK_LOW;
3247 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3248 u32 interval = beacon_interval * TIME_UNIT;
3249 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3250 (addon & BEACON_TIME_MASK_HIGH);
3251
3252 if (base_low > addon_low)
3253 res += base_low - addon_low;
3254 else if (base_low < addon_low) {
3255 res += interval + base_low - addon_low;
3256 res += (1 << 24);
3257 } else
3258 res += (1 << 24);
3259
3260 return cpu_to_le32(res);
3261 }
3262
3263 static int iwl_get_measurement(struct iwl_priv *priv,
3264 struct ieee80211_measurement_params *params,
3265 u8 type)
3266 {
3267 struct iwl_spectrum_cmd spectrum;
3268 struct iwl_rx_packet *res;
3269 struct iwl_host_cmd cmd = {
3270 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3271 .data = (void *)&spectrum,
3272 .meta.flags = CMD_WANT_SKB,
3273 };
3274 u32 add_time = le64_to_cpu(params->start_time);
3275 int rc;
3276 int spectrum_resp_status;
3277 int duration = le16_to_cpu(params->duration);
3278
3279 if (iwl_is_associated(priv))
3280 add_time =
3281 iwl_usecs_to_beacons(
3282 le64_to_cpu(params->start_time) - priv->last_tsf,
3283 le16_to_cpu(priv->rxon_timing.beacon_interval));
3284
3285 memset(&spectrum, 0, sizeof(spectrum));
3286
3287 spectrum.channel_count = cpu_to_le16(1);
3288 spectrum.flags =
3289 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3290 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3291 cmd.len = sizeof(spectrum);
3292 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3293
3294 if (iwl_is_associated(priv))
3295 spectrum.start_time =
3296 iwl_add_beacon_time(priv->last_beacon_time,
3297 add_time,
3298 le16_to_cpu(priv->rxon_timing.beacon_interval));
3299 else
3300 spectrum.start_time = 0;
3301
3302 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3303 spectrum.channels[0].channel = params->channel;
3304 spectrum.channels[0].type = type;
3305 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3306 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3307 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3308
3309 rc = iwl_send_cmd_sync(priv, &cmd);
3310 if (rc)
3311 return rc;
3312
3313 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3314 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3315 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3316 rc = -EIO;
3317 }
3318
3319 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3320 switch (spectrum_resp_status) {
3321 case 0: /* Command will be handled */
3322 if (res->u.spectrum.id != 0xff) {
3323 IWL_DEBUG_INFO
3324 ("Replaced existing measurement: %d\n",
3325 res->u.spectrum.id);
3326 priv->measurement_status &= ~MEASUREMENT_READY;
3327 }
3328 priv->measurement_status |= MEASUREMENT_ACTIVE;
3329 rc = 0;
3330 break;
3331
3332 case 1: /* Command will not be handled */
3333 rc = -EAGAIN;
3334 break;
3335 }
3336
3337 dev_kfree_skb_any(cmd.meta.u.skb);
3338
3339 return rc;
3340 }
3341 #endif
3342
3343 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3344 struct iwl_tx_info *tx_sta)
3345 {
3346
3347 tx_sta->status.ack_signal = 0;
3348 tx_sta->status.excessive_retries = 0;
3349 tx_sta->status.queue_length = 0;
3350 tx_sta->status.queue_number = 0;
3351
3352 if (in_interrupt())
3353 ieee80211_tx_status_irqsafe(priv->hw,
3354 tx_sta->skb[0], &(tx_sta->status));
3355 else
3356 ieee80211_tx_status(priv->hw,
3357 tx_sta->skb[0], &(tx_sta->status));
3358
3359 tx_sta->skb[0] = NULL;
3360 }
3361
3362 /**
3363 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3364 *
3365 * When FW advances 'R' index, all entries between old and
3366 * new 'R' index need to be reclaimed. As result, some free space
3367 * forms. If there is enough free space (> low mark), wake Tx queue.
3368 */
3369 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3370 {
3371 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3372 struct iwl_queue *q = &txq->q;
3373 int nfreed = 0;
3374
3375 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3376 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3377 "is out of range [0-%d] %d %d.\n", txq_id,
3378 index, q->n_bd, q->first_empty, q->last_used);
3379 return 0;
3380 }
3381
3382 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3383 q->last_used != index;
3384 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3385 if (txq_id != IWL_CMD_QUEUE_NUM) {
3386 iwl_txstatus_to_ieee(priv,
3387 &(txq->txb[txq->q.last_used]));
3388 iwl_hw_txq_free_tfd(priv, txq);
3389 } else if (nfreed > 1) {
3390 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3391 q->first_empty, q->last_used);
3392 queue_work(priv->workqueue, &priv->restart);
3393 }
3394 nfreed++;
3395 }
3396
3397 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3398 (txq_id != IWL_CMD_QUEUE_NUM) &&
3399 priv->mac80211_registered)
3400 ieee80211_wake_queue(priv->hw, txq_id);
3401
3402
3403 return nfreed;
3404 }
3405
3406 static int iwl_is_tx_success(u32 status)
3407 {
3408 return (status & 0xFF) == 0x1;
3409 }
3410
3411 /******************************************************************************
3412 *
3413 * Generic RX handler implementations
3414 *
3415 ******************************************************************************/
3416 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3417 struct iwl_rx_mem_buffer *rxb)
3418 {
3419 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3420 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3421 int txq_id = SEQ_TO_QUEUE(sequence);
3422 int index = SEQ_TO_INDEX(sequence);
3423 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3424 struct ieee80211_tx_status *tx_status;
3425 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3426 u32 status = le32_to_cpu(tx_resp->status);
3427
3428 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3429 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3430 "is out of range [0-%d] %d %d\n", txq_id,
3431 index, txq->q.n_bd, txq->q.first_empty,
3432 txq->q.last_used);
3433 return;
3434 }
3435
3436 tx_status = &(txq->txb[txq->q.last_used].status);
3437
3438 tx_status->retry_count = tx_resp->failure_frame;
3439 tx_status->queue_number = status;
3440 tx_status->queue_length = tx_resp->bt_kill_count;
3441 tx_status->queue_length |= tx_resp->failure_rts;
3442
3443 tx_status->flags =
3444 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3445
3446 tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3447
3448 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3449 txq_id, iwl_get_tx_fail_reason(status), status,
3450 tx_resp->rate, tx_resp->failure_frame);
3451
3452 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3453 if (index != -1)
3454 iwl_tx_queue_reclaim(priv, txq_id, index);
3455
3456 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3457 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3458 }
3459
3460
3461 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3462 struct iwl_rx_mem_buffer *rxb)
3463 {
3464 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3465 struct iwl_alive_resp *palive;
3466 struct delayed_work *pwork;
3467
3468 palive = &pkt->u.alive_frame;
3469
3470 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3471 "0x%01X 0x%01X\n",
3472 palive->is_valid, palive->ver_type,
3473 palive->ver_subtype);
3474
3475 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3476 IWL_DEBUG_INFO("Initialization Alive received.\n");
3477 memcpy(&priv->card_alive_init,
3478 &pkt->u.alive_frame,
3479 sizeof(struct iwl_init_alive_resp));
3480 pwork = &priv->init_alive_start;
3481 } else {
3482 IWL_DEBUG_INFO("Runtime Alive received.\n");
3483 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3484 sizeof(struct iwl_alive_resp));
3485 pwork = &priv->alive_start;
3486 iwl_disable_events(priv);
3487 }
3488
3489 /* We delay the ALIVE response by 5ms to
3490 * give the HW RF Kill time to activate... */
3491 if (palive->is_valid == UCODE_VALID_OK)
3492 queue_delayed_work(priv->workqueue, pwork,
3493 msecs_to_jiffies(5));
3494 else
3495 IWL_WARNING("uCode did not respond OK.\n");
3496 }
3497
3498 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3499 struct iwl_rx_mem_buffer *rxb)
3500 {
3501 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3502
3503 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3504 return;
3505 }
3506
3507 static void iwl_rx_reply_error(struct iwl_priv *priv,
3508 struct iwl_rx_mem_buffer *rxb)
3509 {
3510 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3511
3512 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3513 "seq 0x%04X ser 0x%08X\n",
3514 le32_to_cpu(pkt->u.err_resp.error_type),
3515 get_cmd_string(pkt->u.err_resp.cmd_id),
3516 pkt->u.err_resp.cmd_id,
3517 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3518 le32_to_cpu(pkt->u.err_resp.error_info));
3519 }
3520
3521 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3522
3523 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3524 {
3525 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3526 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3527 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3528 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3529 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3530 rxon->channel = csa->channel;
3531 priv->staging_rxon.channel = csa->channel;
3532 }
3533
3534 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3535 struct iwl_rx_mem_buffer *rxb)
3536 {
3537 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3538 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3539 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3540
3541 if (!report->state) {
3542 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3543 "Spectrum Measure Notification: Start\n");
3544 return;
3545 }
3546
3547 memcpy(&priv->measure_report, report, sizeof(*report));
3548 priv->measurement_status |= MEASUREMENT_READY;
3549 #endif
3550 }
3551
3552 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3553 struct iwl_rx_mem_buffer *rxb)
3554 {
3555 #ifdef CONFIG_IWLWIFI_DEBUG
3556 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3557 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3558 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3559 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3560 #endif
3561 }
3562
3563 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3564 struct iwl_rx_mem_buffer *rxb)
3565 {
3566 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3567 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3568 "notification for %s:\n",
3569 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3570 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3571 }
3572
3573 static void iwl_bg_beacon_update(struct work_struct *work)
3574 {
3575 struct iwl_priv *priv =
3576 container_of(work, struct iwl_priv, beacon_update);
3577 struct sk_buff *beacon;
3578
3579 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3580 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3581
3582 if (!beacon) {
3583 IWL_ERROR("update beacon failed\n");
3584 return;
3585 }
3586
3587 mutex_lock(&priv->mutex);
3588 /* new beacon skb is allocated every time; dispose previous.*/
3589 if (priv->ibss_beacon)
3590 dev_kfree_skb(priv->ibss_beacon);
3591
3592 priv->ibss_beacon = beacon;
3593 mutex_unlock(&priv->mutex);
3594
3595 iwl_send_beacon_cmd(priv);
3596 }
3597
3598 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3599 struct iwl_rx_mem_buffer *rxb)
3600 {
3601 #ifdef CONFIG_IWLWIFI_DEBUG
3602 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3603 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3604 u8 rate = beacon->beacon_notify_hdr.rate;
3605
3606 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3607 "tsf %d %d rate %d\n",
3608 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3609 beacon->beacon_notify_hdr.failure_frame,
3610 le32_to_cpu(beacon->ibss_mgr_status),
3611 le32_to_cpu(beacon->high_tsf),
3612 le32_to_cpu(beacon->low_tsf), rate);
3613 #endif
3614
3615 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3616 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3617 queue_work(priv->workqueue, &priv->beacon_update);
3618 }
3619
3620 /* Service response to REPLY_SCAN_CMD (0x80) */
3621 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3622 struct iwl_rx_mem_buffer *rxb)
3623 {
3624 #ifdef CONFIG_IWLWIFI_DEBUG
3625 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3626 struct iwl_scanreq_notification *notif =
3627 (struct iwl_scanreq_notification *)pkt->u.raw;
3628
3629 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3630 #endif
3631 }
3632
3633 /* Service SCAN_START_NOTIFICATION (0x82) */
3634 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3635 struct iwl_rx_mem_buffer *rxb)
3636 {
3637 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3638 struct iwl_scanstart_notification *notif =
3639 (struct iwl_scanstart_notification *)pkt->u.raw;
3640 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3641 IWL_DEBUG_SCAN("Scan start: "
3642 "%d [802.11%s] "
3643 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3644 notif->channel,
3645 notif->band ? "bg" : "a",
3646 notif->tsf_high,
3647 notif->tsf_low, notif->status, notif->beacon_timer);
3648 }
3649
3650 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3651 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3652 struct iwl_rx_mem_buffer *rxb)
3653 {
3654 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3655 struct iwl_scanresults_notification *notif =
3656 (struct iwl_scanresults_notification *)pkt->u.raw;
3657
3658 IWL_DEBUG_SCAN("Scan ch.res: "
3659 "%d [802.11%s] "
3660 "(TSF: 0x%08X:%08X) - %d "
3661 "elapsed=%lu usec (%dms since last)\n",
3662 notif->channel,
3663 notif->band ? "bg" : "a",
3664 le32_to_cpu(notif->tsf_high),
3665 le32_to_cpu(notif->tsf_low),
3666 le32_to_cpu(notif->statistics[0]),
3667 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3668 jiffies_to_msecs(elapsed_jiffies
3669 (priv->last_scan_jiffies, jiffies)));
3670
3671 priv->last_scan_jiffies = jiffies;
3672 }
3673
3674 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3675 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3676 struct iwl_rx_mem_buffer *rxb)
3677 {
3678 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3679 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3680
3681 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3682 scan_notif->scanned_channels,
3683 scan_notif->tsf_low,
3684 scan_notif->tsf_high, scan_notif->status);
3685
3686 /* The HW is no longer scanning */
3687 clear_bit(STATUS_SCAN_HW, &priv->status);
3688
3689 /* The scan completion notification came in, so kill that timer... */
3690 cancel_delayed_work(&priv->scan_check);
3691
3692 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3693 (priv->scan_bands == 2) ? "2.4" : "5.2",
3694 jiffies_to_msecs(elapsed_jiffies
3695 (priv->scan_pass_start, jiffies)));
3696
3697 /* Remove this scanned band from the list
3698 * of pending bands to scan */
3699 priv->scan_bands--;
3700
3701 /* If a request to abort was given, or the scan did not succeed
3702 * then we reset the scan state machine and terminate,
3703 * re-queuing another scan if one has been requested */
3704 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3705 IWL_DEBUG_INFO("Aborted scan completed.\n");
3706 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3707 } else {
3708 /* If there are more bands on this scan pass reschedule */
3709 if (priv->scan_bands > 0)
3710 goto reschedule;
3711 }
3712
3713 priv->last_scan_jiffies = jiffies;
3714 IWL_DEBUG_INFO("Setting scan to off\n");
3715
3716 clear_bit(STATUS_SCANNING, &priv->status);
3717
3718 IWL_DEBUG_INFO("Scan took %dms\n",
3719 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3720
3721 queue_work(priv->workqueue, &priv->scan_completed);
3722
3723 return;
3724
3725 reschedule:
3726 priv->scan_pass_start = jiffies;
3727 queue_work(priv->workqueue, &priv->request_scan);
3728 }
3729
3730 /* Handle notification from uCode that card's power state is changing
3731 * due to software, hardware, or critical temperature RFKILL */
3732 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3733 struct iwl_rx_mem_buffer *rxb)
3734 {
3735 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3736 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3737 unsigned long status = priv->status;
3738
3739 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3740 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3741 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3742
3743 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3744 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3745
3746 if (flags & HW_CARD_DISABLED)
3747 set_bit(STATUS_RF_KILL_HW, &priv->status);
3748 else
3749 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3750
3751
3752 if (flags & SW_CARD_DISABLED)
3753 set_bit(STATUS_RF_KILL_SW, &priv->status);
3754 else
3755 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3756
3757 iwl_scan_cancel(priv);
3758
3759 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3760 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3761 (test_bit(STATUS_RF_KILL_SW, &status) !=
3762 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3763 queue_work(priv->workqueue, &priv->rf_kill);
3764 else
3765 wake_up_interruptible(&priv->wait_command_queue);
3766 }
3767
3768 /**
3769 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3770 *
3771 * Setup the RX handlers for each of the reply types sent from the uCode
3772 * to the host.
3773 *
3774 * This function chains into the hardware specific files for them to setup
3775 * any hardware specific handlers as well.
3776 */
3777 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3778 {
3779 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3780 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3781 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3782 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3783 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3784 iwl_rx_spectrum_measure_notif;
3785 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3786 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3787 iwl_rx_pm_debug_statistics_notif;
3788 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3789
3790 /* NOTE: iwl_rx_statistics is different based on whether
3791 * the build is for the 3945 or the 4965. See the
3792 * corresponding implementation in iwl-XXXX.c
3793 *
3794 * The same handler is used for both the REPLY to a
3795 * discrete statistics request from the host as well as
3796 * for the periodic statistics notification from the uCode
3797 */
3798 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3799 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3800
3801 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3802 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3803 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3804 iwl_rx_scan_results_notif;
3805 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3806 iwl_rx_scan_complete_notif;
3807 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3808 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3809
3810 /* Setup hardware specific Rx handlers */
3811 iwl_hw_rx_handler_setup(priv);
3812 }
3813
3814 /**
3815 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3816 * @rxb: Rx buffer to reclaim
3817 *
3818 * If an Rx buffer has an async callback associated with it the callback
3819 * will be executed. The attached skb (if present) will only be freed
3820 * if the callback returns 1
3821 */
3822 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3823 struct iwl_rx_mem_buffer *rxb)
3824 {
3825 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3826 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3827 int txq_id = SEQ_TO_QUEUE(sequence);
3828 int index = SEQ_TO_INDEX(sequence);
3829 int huge = sequence & SEQ_HUGE_FRAME;
3830 int cmd_index;
3831 struct iwl_cmd *cmd;
3832
3833 /* If a Tx command is being handled and it isn't in the actual
3834 * command queue then there a command routing bug has been introduced
3835 * in the queue management code. */
3836 if (txq_id != IWL_CMD_QUEUE_NUM)
3837 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3838 txq_id, pkt->hdr.cmd);
3839 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3840
3841 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3842 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3843
3844 /* Input error checking is done when commands are added to queue. */
3845 if (cmd->meta.flags & CMD_WANT_SKB) {
3846 cmd->meta.source->u.skb = rxb->skb;
3847 rxb->skb = NULL;
3848 } else if (cmd->meta.u.callback &&
3849 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3850 rxb->skb = NULL;
3851
3852 iwl_tx_queue_reclaim(priv, txq_id, index);
3853
3854 if (!(cmd->meta.flags & CMD_ASYNC)) {
3855 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3856 wake_up_interruptible(&priv->wait_command_queue);
3857 }
3858 }
3859
3860 /************************** RX-FUNCTIONS ****************************/
3861 /*
3862 * Rx theory of operation
3863 *
3864 * The host allocates 32 DMA target addresses and passes the host address
3865 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3866 * 0 to 31
3867 *
3868 * Rx Queue Indexes
3869 * The host/firmware share two index registers for managing the Rx buffers.
3870 *
3871 * The READ index maps to the first position that the firmware may be writing
3872 * to -- the driver can read up to (but not including) this position and get
3873 * good data.
3874 * The READ index is managed by the firmware once the card is enabled.
3875 *
3876 * The WRITE index maps to the last position the driver has read from -- the
3877 * position preceding WRITE is the last slot the firmware can place a packet.
3878 *
3879 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3880 * WRITE = READ.
3881 *
3882 * During initialization the host sets up the READ queue position to the first
3883 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3884 *
3885 * When the firmware places a packet in a buffer it will advance the READ index
3886 * and fire the RX interrupt. The driver can then query the READ index and
3887 * process as many packets as possible, moving the WRITE index forward as it
3888 * resets the Rx queue buffers with new memory.
3889 *
3890 * The management in the driver is as follows:
3891 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3892 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3893 * to replensish the iwl->rxq->rx_free.
3894 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3895 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3896 * 'processed' and 'read' driver indexes as well)
3897 * + A received packet is processed and handed to the kernel network stack,
3898 * detached from the iwl->rxq. The driver 'processed' index is updated.
3899 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3900 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3901 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3902 * were enough free buffers and RX_STALLED is set it is cleared.
3903 *
3904 *
3905 * Driver sequence:
3906 *
3907 * iwl_rx_queue_alloc() Allocates rx_free
3908 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
3909 * iwl_rx_queue_restock
3910 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
3911 * queue, updates firmware pointers, and updates
3912 * the WRITE index. If insufficient rx_free buffers
3913 * are available, schedules iwl_rx_replenish
3914 *
3915 * -- enable interrupts --
3916 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
3917 * READ INDEX, detaching the SKB from the pool.
3918 * Moves the packet buffer from queue to rx_used.
3919 * Calls iwl_rx_queue_restock to refill any empty
3920 * slots.
3921 * ...
3922 *
3923 */
3924
3925 /**
3926 * iwl_rx_queue_space - Return number of free slots available in queue.
3927 */
3928 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3929 {
3930 int s = q->read - q->write;
3931 if (s <= 0)
3932 s += RX_QUEUE_SIZE;
3933 /* keep some buffer to not confuse full and empty queue */
3934 s -= 2;
3935 if (s < 0)
3936 s = 0;
3937 return s;
3938 }
3939
3940 /**
3941 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3942 *
3943 * NOTE: This function has 3945 and 4965 specific code sections
3944 * but is declared in base due to the majority of the
3945 * implementation being the same (only a numeric constant is
3946 * different)
3947 *
3948 */
3949 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3950 {
3951 u32 reg = 0;
3952 int rc = 0;
3953 unsigned long flags;
3954
3955 spin_lock_irqsave(&q->lock, flags);
3956
3957 if (q->need_update == 0)
3958 goto exit_unlock;
3959
3960 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3961 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3962
3963 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3964 iwl_set_bit(priv, CSR_GP_CNTRL,
3965 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3966 goto exit_unlock;
3967 }
3968
3969 rc = iwl_grab_restricted_access(priv);
3970 if (rc)
3971 goto exit_unlock;
3972
3973 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3974 q->write & ~0x7);
3975 iwl_release_restricted_access(priv);
3976 } else
3977 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3978
3979
3980 q->need_update = 0;
3981
3982 exit_unlock:
3983 spin_unlock_irqrestore(&q->lock, flags);
3984 return rc;
3985 }
3986
3987 /**
3988 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3989 *
3990 * NOTE: This function has 3945 and 4965 specific code paths in it.
3991 */
3992 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3993 dma_addr_t dma_addr)
3994 {
3995 return cpu_to_le32((u32)dma_addr);
3996 }
3997
3998 /**
3999 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4000 *
4001 * If there are slots in the RX queue that need to be restocked,
4002 * and we have free pre-allocated buffers, fill the ranks as much
4003 * as we can pulling from rx_free.
4004 *
4005 * This moves the 'write' index forward to catch up with 'processed', and
4006 * also updates the memory address in the firmware to reference the new
4007 * target buffer.
4008 */
4009 int iwl_rx_queue_restock(struct iwl_priv *priv)
4010 {
4011 struct iwl_rx_queue *rxq = &priv->rxq;
4012 struct list_head *element;
4013 struct iwl_rx_mem_buffer *rxb;
4014 unsigned long flags;
4015 int write, rc;
4016
4017 spin_lock_irqsave(&rxq->lock, flags);
4018 write = rxq->write & ~0x7;
4019 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4020 element = rxq->rx_free.next;
4021 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4022 list_del(element);
4023 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4024 rxq->queue[rxq->write] = rxb;
4025 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4026 rxq->free_count--;
4027 }
4028 spin_unlock_irqrestore(&rxq->lock, flags);
4029 /* If the pre-allocated buffer pool is dropping low, schedule to
4030 * refill it */
4031 if (rxq->free_count <= RX_LOW_WATERMARK)
4032 queue_work(priv->workqueue, &priv->rx_replenish);
4033
4034
4035 /* If we've added more space for the firmware to place data, tell it */
4036 if ((write != (rxq->write & ~0x7))
4037 || (abs(rxq->write - rxq->read) > 7)) {
4038 spin_lock_irqsave(&rxq->lock, flags);
4039 rxq->need_update = 1;
4040 spin_unlock_irqrestore(&rxq->lock, flags);
4041 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4042 if (rc)
4043 return rc;
4044 }
4045
4046 return 0;
4047 }
4048
4049 /**
4050 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4051 *
4052 * When moving to rx_free an SKB is allocated for the slot.
4053 *
4054 * Also restock the Rx queue via iwl_rx_queue_restock.
4055 * This is called as a scheduled work item (except for during intialization)
4056 */
4057 void iwl_rx_replenish(void *data)
4058 {
4059 struct iwl_priv *priv = data;
4060 struct iwl_rx_queue *rxq = &priv->rxq;
4061 struct list_head *element;
4062 struct iwl_rx_mem_buffer *rxb;
4063 unsigned long flags;
4064 spin_lock_irqsave(&rxq->lock, flags);
4065 while (!list_empty(&rxq->rx_used)) {
4066 element = rxq->rx_used.next;
4067 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4068 rxb->skb =
4069 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4070 if (!rxb->skb) {
4071 if (net_ratelimit())
4072 printk(KERN_CRIT DRV_NAME
4073 ": Can not allocate SKB buffers\n");
4074 /* We don't reschedule replenish work here -- we will
4075 * call the restock method and if it still needs
4076 * more buffers it will schedule replenish */
4077 break;
4078 }
4079 priv->alloc_rxb_skb++;
4080 list_del(element);
4081 rxb->dma_addr =
4082 pci_map_single(priv->pci_dev, rxb->skb->data,
4083 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4084 list_add_tail(&rxb->list, &rxq->rx_free);
4085 rxq->free_count++;
4086 }
4087 spin_unlock_irqrestore(&rxq->lock, flags);
4088
4089 spin_lock_irqsave(&priv->lock, flags);
4090 iwl_rx_queue_restock(priv);
4091 spin_unlock_irqrestore(&priv->lock, flags);
4092 }
4093
4094 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4095 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4096 * This free routine walks the list of POOL entries and if SKB is set to
4097 * non NULL it is unmapped and freed
4098 */
4099 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4100 {
4101 int i;
4102 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4103 if (rxq->pool[i].skb != NULL) {
4104 pci_unmap_single(priv->pci_dev,
4105 rxq->pool[i].dma_addr,
4106 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4107 dev_kfree_skb(rxq->pool[i].skb);
4108 }
4109 }
4110
4111 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4112 rxq->dma_addr);
4113 rxq->bd = NULL;
4114 }
4115
4116 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4117 {
4118 struct iwl_rx_queue *rxq = &priv->rxq;
4119 struct pci_dev *dev = priv->pci_dev;
4120 int i;
4121
4122 spin_lock_init(&rxq->lock);
4123 INIT_LIST_HEAD(&rxq->rx_free);
4124 INIT_LIST_HEAD(&rxq->rx_used);
4125 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4126 if (!rxq->bd)
4127 return -ENOMEM;
4128 /* Fill the rx_used queue with _all_ of the Rx buffers */
4129 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4130 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4131 /* Set us so that we have processed and used all buffers, but have
4132 * not restocked the Rx queue with fresh buffers */
4133 rxq->read = rxq->write = 0;
4134 rxq->free_count = 0;
4135 rxq->need_update = 0;
4136 return 0;
4137 }
4138
4139 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4140 {
4141 unsigned long flags;
4142 int i;
4143 spin_lock_irqsave(&rxq->lock, flags);
4144 INIT_LIST_HEAD(&rxq->rx_free);
4145 INIT_LIST_HEAD(&rxq->rx_used);
4146 /* Fill the rx_used queue with _all_ of the Rx buffers */
4147 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4148 /* In the reset function, these buffers may have been allocated
4149 * to an SKB, so we need to unmap and free potential storage */
4150 if (rxq->pool[i].skb != NULL) {
4151 pci_unmap_single(priv->pci_dev,
4152 rxq->pool[i].dma_addr,
4153 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4154 priv->alloc_rxb_skb--;
4155 dev_kfree_skb(rxq->pool[i].skb);
4156 rxq->pool[i].skb = NULL;
4157 }
4158 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4159 }
4160
4161 /* Set us so that we have processed and used all buffers, but have
4162 * not restocked the Rx queue with fresh buffers */
4163 rxq->read = rxq->write = 0;
4164 rxq->free_count = 0;
4165 spin_unlock_irqrestore(&rxq->lock, flags);
4166 }
4167
4168 /* Convert linear signal-to-noise ratio into dB */
4169 static u8 ratio2dB[100] = {
4170 /* 0 1 2 3 4 5 6 7 8 9 */
4171 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4172 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4173 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4174 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4175 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4176 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4177 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4178 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4179 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4180 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4181 };
4182
4183 /* Calculates a relative dB value from a ratio of linear
4184 * (i.e. not dB) signal levels.
4185 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4186 int iwl_calc_db_from_ratio(int sig_ratio)
4187 {
4188 /* Anything above 1000:1 just report as 60 dB */
4189 if (sig_ratio > 1000)
4190 return 60;
4191
4192 /* Above 100:1, divide by 10 and use table,
4193 * add 20 dB to make up for divide by 10 */
4194 if (sig_ratio > 100)
4195 return (20 + (int)ratio2dB[sig_ratio/10]);
4196
4197 /* We shouldn't see this */
4198 if (sig_ratio < 1)
4199 return 0;
4200
4201 /* Use table for ratios 1:1 - 99:1 */
4202 return (int)ratio2dB[sig_ratio];
4203 }
4204
4205 #define PERFECT_RSSI (-20) /* dBm */
4206 #define WORST_RSSI (-95) /* dBm */
4207 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4208
4209 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4210 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4211 * about formulas used below. */
4212 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4213 {
4214 int sig_qual;
4215 int degradation = PERFECT_RSSI - rssi_dbm;
4216
4217 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4218 * as indicator; formula is (signal dbm - noise dbm).
4219 * SNR at or above 40 is a great signal (100%).
4220 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4221 * Weakest usable signal is usually 10 - 15 dB SNR. */
4222 if (noise_dbm) {
4223 if (rssi_dbm - noise_dbm >= 40)
4224 return 100;
4225 else if (rssi_dbm < noise_dbm)
4226 return 0;
4227 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4228
4229 /* Else use just the signal level.
4230 * This formula is a least squares fit of data points collected and
4231 * compared with a reference system that had a percentage (%) display
4232 * for signal quality. */
4233 } else
4234 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4235 (15 * RSSI_RANGE + 62 * degradation)) /
4236 (RSSI_RANGE * RSSI_RANGE);
4237
4238 if (sig_qual > 100)
4239 sig_qual = 100;
4240 else if (sig_qual < 1)
4241 sig_qual = 0;
4242
4243 return sig_qual;
4244 }
4245
4246 /**
4247 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4248 *
4249 * Uses the priv->rx_handlers callback function array to invoke
4250 * the appropriate handlers, including command responses,
4251 * frame-received notifications, and other notifications.
4252 */
4253 static void iwl_rx_handle(struct iwl_priv *priv)
4254 {
4255 struct iwl_rx_mem_buffer *rxb;
4256 struct iwl_rx_packet *pkt;
4257 struct iwl_rx_queue *rxq = &priv->rxq;
4258 u32 r, i;
4259 int reclaim;
4260 unsigned long flags;
4261
4262 r = iwl_hw_get_rx_read(priv);
4263 i = rxq->read;
4264
4265 /* Rx interrupt, but nothing sent from uCode */
4266 if (i == r)
4267 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4268
4269 while (i != r) {
4270 rxb = rxq->queue[i];
4271
4272 /* If an RXB doesn't have a queue slot associated with it
4273 * then a bug has been introduced in the queue refilling
4274 * routines -- catch it here */
4275 BUG_ON(rxb == NULL);
4276
4277 rxq->queue[i] = NULL;
4278
4279 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4280 IWL_RX_BUF_SIZE,
4281 PCI_DMA_FROMDEVICE);
4282 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4283
4284 /* Reclaim a command buffer only if this packet is a response
4285 * to a (driver-originated) command.
4286 * If the packet (e.g. Rx frame) originated from uCode,
4287 * there is no command buffer to reclaim.
4288 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4289 * but apparently a few don't get set; catch them here. */
4290 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4291 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4292 (pkt->hdr.cmd != REPLY_TX);
4293
4294 /* Based on type of command response or notification,
4295 * handle those that need handling via function in
4296 * rx_handlers table. See iwl_setup_rx_handlers() */
4297 if (priv->rx_handlers[pkt->hdr.cmd]) {
4298 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4299 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4300 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4301 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4302 } else {
4303 /* No handling needed */
4304 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4305 "r %d i %d No handler needed for %s, 0x%02x\n",
4306 r, i, get_cmd_string(pkt->hdr.cmd),
4307 pkt->hdr.cmd);
4308 }
4309
4310 if (reclaim) {
4311 /* Invoke any callbacks, transfer the skb to caller,
4312 * and fire off the (possibly) blocking iwl_send_cmd()
4313 * as we reclaim the driver command queue */
4314 if (rxb && rxb->skb)
4315 iwl_tx_cmd_complete(priv, rxb);
4316 else
4317 IWL_WARNING("Claim null rxb?\n");
4318 }
4319
4320 /* For now we just don't re-use anything. We can tweak this
4321 * later to try and re-use notification packets and SKBs that
4322 * fail to Rx correctly */
4323 if (rxb->skb != NULL) {
4324 priv->alloc_rxb_skb--;
4325 dev_kfree_skb_any(rxb->skb);
4326 rxb->skb = NULL;
4327 }
4328
4329 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4330 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4331 spin_lock_irqsave(&rxq->lock, flags);
4332 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4333 spin_unlock_irqrestore(&rxq->lock, flags);
4334 i = (i + 1) & RX_QUEUE_MASK;
4335 }
4336
4337 /* Backtrack one entry */
4338 priv->rxq.read = i;
4339 iwl_rx_queue_restock(priv);
4340 }
4341
4342 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4343 struct iwl_tx_queue *txq)
4344 {
4345 u32 reg = 0;
4346 int rc = 0;
4347 int txq_id = txq->q.id;
4348
4349 if (txq->need_update == 0)
4350 return rc;
4351
4352 /* if we're trying to save power */
4353 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4354 /* wake up nic if it's powered down ...
4355 * uCode will wake up, and interrupt us again, so next
4356 * time we'll skip this part. */
4357 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4358
4359 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4360 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4361 iwl_set_bit(priv, CSR_GP_CNTRL,
4362 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4363 return rc;
4364 }
4365
4366 /* restore this queue's parameters in nic hardware. */
4367 rc = iwl_grab_restricted_access(priv);
4368 if (rc)
4369 return rc;
4370 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4371 txq->q.first_empty | (txq_id << 8));
4372 iwl_release_restricted_access(priv);
4373
4374 /* else not in power-save mode, uCode will never sleep when we're
4375 * trying to tx (during RFKILL, we're not trying to tx). */
4376 } else
4377 iwl_write32(priv, HBUS_TARG_WRPTR,
4378 txq->q.first_empty | (txq_id << 8));
4379
4380 txq->need_update = 0;
4381
4382 return rc;
4383 }
4384
4385 #ifdef CONFIG_IWLWIFI_DEBUG
4386 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4387 {
4388 IWL_DEBUG_RADIO("RX CONFIG:\n");
4389 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4390 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4391 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4392 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4393 le32_to_cpu(rxon->filter_flags));
4394 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4395 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4396 rxon->ofdm_basic_rates);
4397 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4398 IWL_DEBUG_RADIO("u8[6] node_addr: " MAC_FMT "\n",
4399 MAC_ARG(rxon->node_addr));
4400 IWL_DEBUG_RADIO("u8[6] bssid_addr: " MAC_FMT "\n",
4401 MAC_ARG(rxon->bssid_addr));
4402 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4403 }
4404 #endif
4405
4406 static void iwl_enable_interrupts(struct iwl_priv *priv)
4407 {
4408 IWL_DEBUG_ISR("Enabling interrupts\n");
4409 set_bit(STATUS_INT_ENABLED, &priv->status);
4410 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4411 }
4412
4413 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4414 {
4415 clear_bit(STATUS_INT_ENABLED, &priv->status);
4416
4417 /* disable interrupts from uCode/NIC to host */
4418 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4419
4420 /* acknowledge/clear/reset any interrupts still pending
4421 * from uCode or flow handler (Rx/Tx DMA) */
4422 iwl_write32(priv, CSR_INT, 0xffffffff);
4423 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4424 IWL_DEBUG_ISR("Disabled interrupts\n");
4425 }
4426
4427 static const char *desc_lookup(int i)
4428 {
4429 switch (i) {
4430 case 1:
4431 return "FAIL";
4432 case 2:
4433 return "BAD_PARAM";
4434 case 3:
4435 return "BAD_CHECKSUM";
4436 case 4:
4437 return "NMI_INTERRUPT";
4438 case 5:
4439 return "SYSASSERT";
4440 case 6:
4441 return "FATAL_ERROR";
4442 }
4443
4444 return "UNKNOWN";
4445 }
4446
4447 #define ERROR_START_OFFSET (1 * sizeof(u32))
4448 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4449
4450 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4451 {
4452 u32 i;
4453 u32 desc, time, count, base, data1;
4454 u32 blink1, blink2, ilink1, ilink2;
4455 int rc;
4456
4457 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4458
4459 if (!iwl_hw_valid_rtc_data_addr(base)) {
4460 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4461 return;
4462 }
4463
4464 rc = iwl_grab_restricted_access(priv);
4465 if (rc) {
4466 IWL_WARNING("Can not read from adapter at this time.\n");
4467 return;
4468 }
4469
4470 count = iwl_read_restricted_mem(priv, base);
4471
4472 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4473 IWL_ERROR("Start IWL Error Log Dump:\n");
4474 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4475 priv->status, priv->config, count);
4476 }
4477
4478 IWL_ERROR("Desc Time asrtPC blink2 "
4479 "ilink1 nmiPC Line\n");
4480 for (i = ERROR_START_OFFSET;
4481 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4482 i += ERROR_ELEM_SIZE) {
4483 desc = iwl_read_restricted_mem(priv, base + i);
4484 time =
4485 iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4486 blink1 =
4487 iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4488 blink2 =
4489 iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4490 ilink1 =
4491 iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4492 ilink2 =
4493 iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4494 data1 =
4495 iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4496
4497 IWL_ERROR
4498 ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4499 desc_lookup(desc), desc, time, blink1, blink2,
4500 ilink1, ilink2, data1);
4501 }
4502
4503 iwl_release_restricted_access(priv);
4504
4505 }
4506
4507 #define EVENT_START_OFFSET (4 * sizeof(u32))
4508
4509 /**
4510 * iwl_print_event_log - Dump error event log to syslog
4511 *
4512 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4513 */
4514 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4515 u32 num_events, u32 mode)
4516 {
4517 u32 i;
4518 u32 base; /* SRAM byte address of event log header */
4519 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4520 u32 ptr; /* SRAM byte address of log data */
4521 u32 ev, time, data; /* event log data */
4522
4523 if (num_events == 0)
4524 return;
4525
4526 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4527
4528 if (mode == 0)
4529 event_size = 2 * sizeof(u32);
4530 else
4531 event_size = 3 * sizeof(u32);
4532
4533 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4534
4535 /* "time" is actually "data" for mode 0 (no timestamp).
4536 * place event id # at far right for easier visual parsing. */
4537 for (i = 0; i < num_events; i++) {
4538 ev = iwl_read_restricted_mem(priv, ptr);
4539 ptr += sizeof(u32);
4540 time = iwl_read_restricted_mem(priv, ptr);
4541 ptr += sizeof(u32);
4542 if (mode == 0)
4543 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4544 else {
4545 data = iwl_read_restricted_mem(priv, ptr);
4546 ptr += sizeof(u32);
4547 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4548 }
4549 }
4550 }
4551
4552 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4553 {
4554 int rc;
4555 u32 base; /* SRAM byte address of event log header */
4556 u32 capacity; /* event log capacity in # entries */
4557 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4558 u32 num_wraps; /* # times uCode wrapped to top of log */
4559 u32 next_entry; /* index of next entry to be written by uCode */
4560 u32 size; /* # entries that we'll print */
4561
4562 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4563 if (!iwl_hw_valid_rtc_data_addr(base)) {
4564 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4565 return;
4566 }
4567
4568 rc = iwl_grab_restricted_access(priv);
4569 if (rc) {
4570 IWL_WARNING("Can not read from adapter at this time.\n");
4571 return;
4572 }
4573
4574 /* event log header */
4575 capacity = iwl_read_restricted_mem(priv, base);
4576 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4577 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4578 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4579
4580 size = num_wraps ? capacity : next_entry;
4581
4582 /* bail out if nothing in log */
4583 if (size == 0) {
4584 IWL_ERROR("Start IPW Event Log Dump: nothing in log\n");
4585 iwl_release_restricted_access(priv);
4586 return;
4587 }
4588
4589 IWL_ERROR("Start IPW Event Log Dump: display count %d, wraps %d\n",
4590 size, num_wraps);
4591
4592 /* if uCode has wrapped back to top of log, start at the oldest entry,
4593 * i.e the next one that uCode would fill. */
4594 if (num_wraps)
4595 iwl_print_event_log(priv, next_entry,
4596 capacity - next_entry, mode);
4597
4598 /* (then/else) start at top of log */
4599 iwl_print_event_log(priv, 0, next_entry, mode);
4600
4601 iwl_release_restricted_access(priv);
4602 }
4603
4604 /**
4605 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4606 */
4607 static void iwl_irq_handle_error(struct iwl_priv *priv)
4608 {
4609 /* Set the FW error flag -- cleared on iwl_down */
4610 set_bit(STATUS_FW_ERROR, &priv->status);
4611
4612 /* Cancel currently queued command. */
4613 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4614
4615 #ifdef CONFIG_IWLWIFI_DEBUG
4616 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4617 iwl_dump_nic_error_log(priv);
4618 iwl_dump_nic_event_log(priv);
4619 iwl_print_rx_config_cmd(&priv->staging_rxon);
4620 }
4621 #endif
4622
4623 wake_up_interruptible(&priv->wait_command_queue);
4624
4625 /* Keep the restart process from trying to send host
4626 * commands by clearing the INIT status bit */
4627 clear_bit(STATUS_READY, &priv->status);
4628
4629 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4630 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4631 "Restarting adapter due to uCode error.\n");
4632
4633 if (iwl_is_associated(priv)) {
4634 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4635 sizeof(priv->recovery_rxon));
4636 priv->error_recovering = 1;
4637 }
4638 queue_work(priv->workqueue, &priv->restart);
4639 }
4640 }
4641
4642 static void iwl_error_recovery(struct iwl_priv *priv)
4643 {
4644 unsigned long flags;
4645
4646 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4647 sizeof(priv->staging_rxon));
4648 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4649 iwl_commit_rxon(priv);
4650
4651 iwl_rxon_add_station(priv, priv->bssid, 1);
4652
4653 spin_lock_irqsave(&priv->lock, flags);
4654 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4655 priv->error_recovering = 0;
4656 spin_unlock_irqrestore(&priv->lock, flags);
4657 }
4658
4659 static void iwl_irq_tasklet(struct iwl_priv *priv)
4660 {
4661 u32 inta, handled = 0;
4662 u32 inta_fh;
4663 unsigned long flags;
4664 #ifdef CONFIG_IWLWIFI_DEBUG
4665 u32 inta_mask;
4666 #endif
4667
4668 spin_lock_irqsave(&priv->lock, flags);
4669
4670 /* Ack/clear/reset pending uCode interrupts.
4671 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4672 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4673 inta = iwl_read32(priv, CSR_INT);
4674 iwl_write32(priv, CSR_INT, inta);
4675
4676 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4677 * Any new interrupts that happen after this, either while we're
4678 * in this tasklet, or later, will show up in next ISR/tasklet. */
4679 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4680 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4681
4682 #ifdef CONFIG_IWLWIFI_DEBUG
4683 if (iwl_debug_level & IWL_DL_ISR) {
4684 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4685 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4686 inta, inta_mask, inta_fh);
4687 }
4688 #endif
4689
4690 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4691 * atomic, make sure that inta covers all the interrupts that
4692 * we've discovered, even if FH interrupt came in just after
4693 * reading CSR_INT. */
4694 if (inta_fh & CSR_FH_INT_RX_MASK)
4695 inta |= CSR_INT_BIT_FH_RX;
4696 if (inta_fh & CSR_FH_INT_TX_MASK)
4697 inta |= CSR_INT_BIT_FH_TX;
4698
4699 /* Now service all interrupt bits discovered above. */
4700 if (inta & CSR_INT_BIT_HW_ERR) {
4701 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4702
4703 /* Tell the device to stop sending interrupts */
4704 iwl_disable_interrupts(priv);
4705
4706 iwl_irq_handle_error(priv);
4707
4708 handled |= CSR_INT_BIT_HW_ERR;
4709
4710 spin_unlock_irqrestore(&priv->lock, flags);
4711
4712 return;
4713 }
4714
4715 #ifdef CONFIG_IWLWIFI_DEBUG
4716 if (iwl_debug_level & (IWL_DL_ISR)) {
4717 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4718 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4719 IWL_DEBUG_ISR("Microcode started or stopped.\n");
4720
4721 /* Alive notification via Rx interrupt will do the real work */
4722 if (inta & CSR_INT_BIT_ALIVE)
4723 IWL_DEBUG_ISR("Alive interrupt\n");
4724 }
4725 #endif
4726 /* Safely ignore these bits for debug checks below */
4727 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4728
4729 /* HW RF KILL switch toggled (4965 only) */
4730 if (inta & CSR_INT_BIT_RF_KILL) {
4731 int hw_rf_kill = 0;
4732 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4733 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4734 hw_rf_kill = 1;
4735
4736 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4737 "RF_KILL bit toggled to %s.\n",
4738 hw_rf_kill ? "disable radio":"enable radio");
4739
4740 /* Queue restart only if RF_KILL switch was set to "kill"
4741 * when we loaded driver, and is now set to "enable".
4742 * After we're Alive, RF_KILL gets handled by
4743 * iwl_rx_card_state_notif() */
4744 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4745 queue_work(priv->workqueue, &priv->restart);
4746
4747 handled |= CSR_INT_BIT_RF_KILL;
4748 }
4749
4750 /* Chip got too hot and stopped itself (4965 only) */
4751 if (inta & CSR_INT_BIT_CT_KILL) {
4752 IWL_ERROR("Microcode CT kill error detected.\n");
4753 handled |= CSR_INT_BIT_CT_KILL;
4754 }
4755
4756 /* Error detected by uCode */
4757 if (inta & CSR_INT_BIT_SW_ERR) {
4758 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4759 inta);
4760 iwl_irq_handle_error(priv);
4761 handled |= CSR_INT_BIT_SW_ERR;
4762 }
4763
4764 /* uCode wakes up after power-down sleep */
4765 if (inta & CSR_INT_BIT_WAKEUP) {
4766 IWL_DEBUG_ISR("Wakeup interrupt\n");
4767 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4768 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4769 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4770 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4771 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4772 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4773 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4774
4775 handled |= CSR_INT_BIT_WAKEUP;
4776 }
4777
4778 /* All uCode command responses, including Tx command responses,
4779 * Rx "responses" (frame-received notification), and other
4780 * notifications from uCode come through here*/
4781 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4782 iwl_rx_handle(priv);
4783 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4784 }
4785
4786 if (inta & CSR_INT_BIT_FH_TX) {
4787 IWL_DEBUG_ISR("Tx interrupt\n");
4788
4789 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4790 if (!iwl_grab_restricted_access(priv)) {
4791 iwl_write_restricted(priv,
4792 FH_TCSR_CREDIT
4793 (ALM_FH_SRVC_CHNL), 0x0);
4794 iwl_release_restricted_access(priv);
4795 }
4796 handled |= CSR_INT_BIT_FH_TX;
4797 }
4798
4799 if (inta & ~handled)
4800 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4801
4802 if (inta & ~CSR_INI_SET_MASK) {
4803 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4804 inta & ~CSR_INI_SET_MASK);
4805 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4806 }
4807
4808 /* Re-enable all interrupts */
4809 iwl_enable_interrupts(priv);
4810
4811 #ifdef CONFIG_IWLWIFI_DEBUG
4812 if (iwl_debug_level & (IWL_DL_ISR)) {
4813 inta = iwl_read32(priv, CSR_INT);
4814 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4815 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4816 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4817 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4818 }
4819 #endif
4820 spin_unlock_irqrestore(&priv->lock, flags);
4821 }
4822
4823 static irqreturn_t iwl_isr(int irq, void *data)
4824 {
4825 struct iwl_priv *priv = data;
4826 u32 inta, inta_mask;
4827 u32 inta_fh;
4828 if (!priv)
4829 return IRQ_NONE;
4830
4831 spin_lock(&priv->lock);
4832
4833 /* Disable (but don't clear!) interrupts here to avoid
4834 * back-to-back ISRs and sporadic interrupts from our NIC.
4835 * If we have something to service, the tasklet will re-enable ints.
4836 * If we *don't* have something, we'll re-enable before leaving here. */
4837 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4838 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4839
4840 /* Discover which interrupts are active/pending */
4841 inta = iwl_read32(priv, CSR_INT);
4842 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4843
4844 /* Ignore interrupt if there's nothing in NIC to service.
4845 * This may be due to IRQ shared with another device,
4846 * or due to sporadic interrupts thrown from our NIC. */
4847 if (!inta && !inta_fh) {
4848 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4849 goto none;
4850 }
4851
4852 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4853 /* Hardware disappeared */
4854 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4855 goto none;
4856 }
4857
4858 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4859 inta, inta_mask, inta_fh);
4860
4861 /* iwl_irq_tasklet() will service interrupts and re-enable them */
4862 tasklet_schedule(&priv->irq_tasklet);
4863 spin_unlock(&priv->lock);
4864
4865 return IRQ_HANDLED;
4866
4867 none:
4868 /* re-enable interrupts here since we don't have anything to service. */
4869 iwl_enable_interrupts(priv);
4870 spin_unlock(&priv->lock);
4871 return IRQ_NONE;
4872 }
4873
4874 /************************** EEPROM BANDS ****************************
4875 *
4876 * The iwl_eeprom_band definitions below provide the mapping from the
4877 * EEPROM contents to the specific channel number supported for each
4878 * band.
4879 *
4880 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4881 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4882 * The specific geography and calibration information for that channel
4883 * is contained in the eeprom map itself.
4884 *
4885 * During init, we copy the eeprom information and channel map
4886 * information into priv->channel_info_24/52 and priv->channel_map_24/52
4887 *
4888 * channel_map_24/52 provides the index in the channel_info array for a
4889 * given channel. We have to have two separate maps as there is channel
4890 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4891 * band_2
4892 *
4893 * A value of 0xff stored in the channel_map indicates that the channel
4894 * is not supported by the hardware at all.
4895 *
4896 * A value of 0xfe in the channel_map indicates that the channel is not
4897 * valid for Tx with the current hardware. This means that
4898 * while the system can tune and receive on a given channel, it may not
4899 * be able to associate or transmit any frames on that
4900 * channel. There is no corresponding channel information for that
4901 * entry.
4902 *
4903 *********************************************************************/
4904
4905 /* 2.4 GHz */
4906 static const u8 iwl_eeprom_band_1[14] = {
4907 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4908 };
4909
4910 /* 5.2 GHz bands */
4911 static const u8 iwl_eeprom_band_2[] = {
4912 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4913 };
4914
4915 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4916 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4917 };
4918
4919 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4920 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4921 };
4922
4923 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4924 145, 149, 153, 157, 161, 165
4925 };
4926
4927 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4928 int *eeprom_ch_count,
4929 const struct iwl_eeprom_channel
4930 **eeprom_ch_info,
4931 const u8 **eeprom_ch_index)
4932 {
4933 switch (band) {
4934 case 1: /* 2.4GHz band */
4935 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4936 *eeprom_ch_info = priv->eeprom.band_1_channels;
4937 *eeprom_ch_index = iwl_eeprom_band_1;
4938 break;
4939 case 2: /* 5.2GHz band */
4940 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4941 *eeprom_ch_info = priv->eeprom.band_2_channels;
4942 *eeprom_ch_index = iwl_eeprom_band_2;
4943 break;
4944 case 3: /* 5.2GHz band */
4945 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4946 *eeprom_ch_info = priv->eeprom.band_3_channels;
4947 *eeprom_ch_index = iwl_eeprom_band_3;
4948 break;
4949 case 4: /* 5.2GHz band */
4950 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4951 *eeprom_ch_info = priv->eeprom.band_4_channels;
4952 *eeprom_ch_index = iwl_eeprom_band_4;
4953 break;
4954 case 5: /* 5.2GHz band */
4955 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4956 *eeprom_ch_info = priv->eeprom.band_5_channels;
4957 *eeprom_ch_index = iwl_eeprom_band_5;
4958 break;
4959 default:
4960 BUG();
4961 return;
4962 }
4963 }
4964
4965 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4966 int phymode, u16 channel)
4967 {
4968 int i;
4969
4970 switch (phymode) {
4971 case MODE_IEEE80211A:
4972 for (i = 14; i < priv->channel_count; i++) {
4973 if (priv->channel_info[i].channel == channel)
4974 return &priv->channel_info[i];
4975 }
4976 break;
4977
4978 case MODE_IEEE80211B:
4979 case MODE_IEEE80211G:
4980 if (channel >= 1 && channel <= 14)
4981 return &priv->channel_info[channel - 1];
4982 break;
4983
4984 }
4985
4986 return NULL;
4987 }
4988
4989 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4990 ? # x " " : "")
4991
4992 static int iwl_init_channel_map(struct iwl_priv *priv)
4993 {
4994 int eeprom_ch_count = 0;
4995 const u8 *eeprom_ch_index = NULL;
4996 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4997 int band, ch;
4998 struct iwl_channel_info *ch_info;
4999
5000 if (priv->channel_count) {
5001 IWL_DEBUG_INFO("Channel map already initialized.\n");
5002 return 0;
5003 }
5004
5005 if (priv->eeprom.version < 0x2f) {
5006 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5007 priv->eeprom.version);
5008 return -EINVAL;
5009 }
5010
5011 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5012
5013 priv->channel_count =
5014 ARRAY_SIZE(iwl_eeprom_band_1) +
5015 ARRAY_SIZE(iwl_eeprom_band_2) +
5016 ARRAY_SIZE(iwl_eeprom_band_3) +
5017 ARRAY_SIZE(iwl_eeprom_band_4) +
5018 ARRAY_SIZE(iwl_eeprom_band_5);
5019
5020 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5021
5022 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5023 priv->channel_count, GFP_KERNEL);
5024 if (!priv->channel_info) {
5025 IWL_ERROR("Could not allocate channel_info\n");
5026 priv->channel_count = 0;
5027 return -ENOMEM;
5028 }
5029
5030 ch_info = priv->channel_info;
5031
5032 /* Loop through the 5 EEPROM bands adding them in order to the
5033 * channel map we maintain (that contains additional information than
5034 * what just in the EEPROM) */
5035 for (band = 1; band <= 5; band++) {
5036
5037 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5038 &eeprom_ch_info, &eeprom_ch_index);
5039
5040 /* Loop through each band adding each of the channels */
5041 for (ch = 0; ch < eeprom_ch_count; ch++) {
5042 ch_info->channel = eeprom_ch_index[ch];
5043 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5044 MODE_IEEE80211A;
5045
5046 /* permanently store EEPROM's channel regulatory flags
5047 * and max power in channel info database. */
5048 ch_info->eeprom = eeprom_ch_info[ch];
5049
5050 /* Copy the run-time flags so they are there even on
5051 * invalid channels */
5052 ch_info->flags = eeprom_ch_info[ch].flags;
5053
5054 if (!(is_channel_valid(ch_info))) {
5055 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5056 "No traffic\n",
5057 ch_info->channel,
5058 ch_info->flags,
5059 is_channel_a_band(ch_info) ?
5060 "5.2" : "2.4");
5061 ch_info++;
5062 continue;
5063 }
5064
5065 /* Initialize regulatory-based run-time data */
5066 ch_info->max_power_avg = ch_info->curr_txpow =
5067 eeprom_ch_info[ch].max_power_avg;
5068 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5069 ch_info->min_power = 0;
5070
5071 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5072 " %ddBm): Ad-Hoc %ssupported\n",
5073 ch_info->channel,
5074 is_channel_a_band(ch_info) ?
5075 "5.2" : "2.4",
5076 CHECK_AND_PRINT(IBSS),
5077 CHECK_AND_PRINT(ACTIVE),
5078 CHECK_AND_PRINT(RADAR),
5079 CHECK_AND_PRINT(WIDE),
5080 CHECK_AND_PRINT(NARROW),
5081 CHECK_AND_PRINT(DFS),
5082 eeprom_ch_info[ch].flags,
5083 eeprom_ch_info[ch].max_power_avg,
5084 ((eeprom_ch_info[ch].
5085 flags & EEPROM_CHANNEL_IBSS)
5086 && !(eeprom_ch_info[ch].
5087 flags & EEPROM_CHANNEL_RADAR))
5088 ? "" : "not ");
5089
5090 /* Set the user_txpower_limit to the highest power
5091 * supported by any channel */
5092 if (eeprom_ch_info[ch].max_power_avg >
5093 priv->user_txpower_limit)
5094 priv->user_txpower_limit =
5095 eeprom_ch_info[ch].max_power_avg;
5096
5097 ch_info++;
5098 }
5099 }
5100
5101 if (iwl3945_txpower_set_from_eeprom(priv))
5102 return -EIO;
5103
5104 return 0;
5105 }
5106
5107 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5108 * sending probe req. This should be set long enough to hear probe responses
5109 * from more than one AP. */
5110 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5111 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5112
5113 /* For faster active scanning, scan will move to the next channel if fewer than
5114 * PLCP_QUIET_THRESH packets are heard on this channel within
5115 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5116 * time if it's a quiet channel (nothing responded to our probe, and there's
5117 * no other traffic).
5118 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5119 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5120 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5121
5122 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5123 * Must be set longer than active dwell time.
5124 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5125 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5126 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5127 #define IWL_PASSIVE_DWELL_BASE (100)
5128 #define IWL_CHANNEL_TUNE_TIME 5
5129
5130 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5131 {
5132 if (phymode == MODE_IEEE80211A)
5133 return IWL_ACTIVE_DWELL_TIME_52;
5134 else
5135 return IWL_ACTIVE_DWELL_TIME_24;
5136 }
5137
5138 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5139 {
5140 u16 active = iwl_get_active_dwell_time(priv, phymode);
5141 u16 passive = (phymode != MODE_IEEE80211A) ?
5142 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5143 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5144
5145 if (iwl_is_associated(priv)) {
5146 /* If we're associated, we clamp the maximum passive
5147 * dwell time to be 98% of the beacon interval (minus
5148 * 2 * channel tune time) */
5149 passive = priv->beacon_int;
5150 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5151 passive = IWL_PASSIVE_DWELL_BASE;
5152 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5153 }
5154
5155 if (passive <= active)
5156 passive = active + 1;
5157
5158 return passive;
5159 }
5160
5161 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5162 u8 is_active, u8 direct_mask,
5163 struct iwl_scan_channel *scan_ch)
5164 {
5165 const struct ieee80211_channel *channels = NULL;
5166 const struct ieee80211_hw_mode *hw_mode;
5167 const struct iwl_channel_info *ch_info;
5168 u16 passive_dwell = 0;
5169 u16 active_dwell = 0;
5170 int added, i;
5171
5172 hw_mode = iwl_get_hw_mode(priv, phymode);
5173 if (!hw_mode)
5174 return 0;
5175
5176 channels = hw_mode->channels;
5177
5178 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5179 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5180
5181 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5182 if (channels[i].chan ==
5183 le16_to_cpu(priv->active_rxon.channel)) {
5184 if (iwl_is_associated(priv)) {
5185 IWL_DEBUG_SCAN
5186 ("Skipping current channel %d\n",
5187 le16_to_cpu(priv->active_rxon.channel));
5188 continue;
5189 }
5190 } else if (priv->only_active_channel)
5191 continue;
5192
5193 scan_ch->channel = channels[i].chan;
5194
5195 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5196 if (!is_channel_valid(ch_info)) {
5197 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5198 scan_ch->channel);
5199 continue;
5200 }
5201
5202 if (!is_active || is_channel_passive(ch_info) ||
5203 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5204 scan_ch->type = 0; /* passive */
5205 else
5206 scan_ch->type = 1; /* active */
5207
5208 if (scan_ch->type & 1)
5209 scan_ch->type |= (direct_mask << 1);
5210
5211 if (is_channel_narrow(ch_info))
5212 scan_ch->type |= (1 << 7);
5213
5214 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5215 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5216
5217 /* Set power levels to defaults */
5218 scan_ch->tpc.dsp_atten = 110;
5219 /* scan_pwr_info->tpc.dsp_atten; */
5220
5221 /*scan_pwr_info->tpc.tx_gain; */
5222 if (phymode == MODE_IEEE80211A)
5223 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5224 else {
5225 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5226 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5227 * power level
5228 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5229 */
5230 }
5231
5232 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5233 scan_ch->channel,
5234 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5235 (scan_ch->type & 1) ?
5236 active_dwell : passive_dwell);
5237
5238 scan_ch++;
5239 added++;
5240 }
5241
5242 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5243 return added;
5244 }
5245
5246 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5247 {
5248 int i, j;
5249 for (i = 0; i < 3; i++) {
5250 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5251 for (j = 0; j < hw_mode->num_channels; j++)
5252 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5253 }
5254 }
5255
5256 static void iwl_init_hw_rates(struct iwl_priv *priv,
5257 struct ieee80211_rate *rates)
5258 {
5259 int i;
5260
5261 for (i = 0; i < IWL_RATE_COUNT; i++) {
5262 rates[i].rate = iwl_rates[i].ieee * 5;
5263 rates[i].val = i; /* Rate scaling will work on indexes */
5264 rates[i].val2 = i;
5265 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5266 /* Only OFDM have the bits-per-symbol set */
5267 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5268 rates[i].flags |= IEEE80211_RATE_OFDM;
5269 else {
5270 /*
5271 * If CCK 1M then set rate flag to CCK else CCK_2
5272 * which is CCK | PREAMBLE2
5273 */
5274 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5275 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5276 }
5277
5278 /* Set up which ones are basic rates... */
5279 if (IWL_BASIC_RATES_MASK & (1 << i))
5280 rates[i].flags |= IEEE80211_RATE_BASIC;
5281 }
5282 }
5283
5284 /**
5285 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5286 */
5287 static int iwl_init_geos(struct iwl_priv *priv)
5288 {
5289 struct iwl_channel_info *ch;
5290 struct ieee80211_hw_mode *modes;
5291 struct ieee80211_channel *channels;
5292 struct ieee80211_channel *geo_ch;
5293 struct ieee80211_rate *rates;
5294 int i = 0;
5295 enum {
5296 A = 0,
5297 B = 1,
5298 G = 2,
5299 };
5300 int mode_count = 3;
5301
5302 if (priv->modes) {
5303 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5304 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5305 return 0;
5306 }
5307
5308 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5309 GFP_KERNEL);
5310 if (!modes)
5311 return -ENOMEM;
5312
5313 channels = kzalloc(sizeof(struct ieee80211_channel) *
5314 priv->channel_count, GFP_KERNEL);
5315 if (!channels) {
5316 kfree(modes);
5317 return -ENOMEM;
5318 }
5319
5320 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5321 GFP_KERNEL);
5322 if (!rates) {
5323 kfree(modes);
5324 kfree(channels);
5325 return -ENOMEM;
5326 }
5327
5328 /* 0 = 802.11a
5329 * 1 = 802.11b
5330 * 2 = 802.11g
5331 */
5332
5333 /* 5.2GHz channels start after the 2.4GHz channels */
5334 modes[A].mode = MODE_IEEE80211A;
5335 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5336 modes[A].rates = rates;
5337 modes[A].num_rates = 8; /* just OFDM */
5338 modes[A].num_channels = 0;
5339
5340 modes[B].mode = MODE_IEEE80211B;
5341 modes[B].channels = channels;
5342 modes[B].rates = &rates[8];
5343 modes[B].num_rates = 4; /* just CCK */
5344 modes[B].num_channels = 0;
5345
5346 modes[G].mode = MODE_IEEE80211G;
5347 modes[G].channels = channels;
5348 modes[G].rates = rates;
5349 modes[G].num_rates = 12; /* OFDM & CCK */
5350 modes[G].num_channels = 0;
5351
5352 priv->ieee_channels = channels;
5353 priv->ieee_rates = rates;
5354
5355 iwl_init_hw_rates(priv, rates);
5356
5357 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5358 ch = &priv->channel_info[i];
5359
5360 if (!is_channel_valid(ch)) {
5361 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5362 "skipping.\n",
5363 ch->channel, is_channel_a_band(ch) ?
5364 "5.2" : "2.4");
5365 continue;
5366 }
5367
5368 if (is_channel_a_band(ch))
5369 geo_ch = &modes[A].channels[modes[A].num_channels++];
5370 else {
5371 geo_ch = &modes[B].channels[modes[B].num_channels++];
5372 modes[G].num_channels++;
5373 }
5374
5375 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5376 geo_ch->chan = ch->channel;
5377 geo_ch->power_level = ch->max_power_avg;
5378 geo_ch->antenna_max = 0xff;
5379
5380 if (is_channel_valid(ch)) {
5381 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5382 if (ch->flags & EEPROM_CHANNEL_IBSS)
5383 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5384
5385 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5386 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5387
5388 if (ch->flags & EEPROM_CHANNEL_RADAR)
5389 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5390
5391 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5392 priv->max_channel_txpower_limit =
5393 ch->max_power_avg;
5394 }
5395
5396 geo_ch->val = geo_ch->flag;
5397 }
5398
5399 if ((modes[A].num_channels == 0) && priv->is_abg) {
5400 printk(KERN_INFO DRV_NAME
5401 ": Incorrectly detected BG card as ABG. Please send "
5402 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5403 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5404 priv->is_abg = 0;
5405 }
5406
5407 printk(KERN_INFO DRV_NAME
5408 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5409 modes[G].num_channels, modes[A].num_channels);
5410
5411 /*
5412 * NOTE: We register these in preference of order -- the
5413 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5414 * a phymode based on rates or AP capabilities but seems to
5415 * configure it purely on if the channel being configured
5416 * is supported by a mode -- and the first match is taken
5417 */
5418
5419 if (modes[G].num_channels)
5420 ieee80211_register_hwmode(priv->hw, &modes[G]);
5421 if (modes[B].num_channels)
5422 ieee80211_register_hwmode(priv->hw, &modes[B]);
5423 if (modes[A].num_channels)
5424 ieee80211_register_hwmode(priv->hw, &modes[A]);
5425
5426 priv->modes = modes;
5427 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5428
5429 return 0;
5430 }
5431
5432 /******************************************************************************
5433 *
5434 * uCode download functions
5435 *
5436 ******************************************************************************/
5437
5438 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5439 {
5440 if (priv->ucode_code.v_addr != NULL) {
5441 pci_free_consistent(priv->pci_dev,
5442 priv->ucode_code.len,
5443 priv->ucode_code.v_addr,
5444 priv->ucode_code.p_addr);
5445 priv->ucode_code.v_addr = NULL;
5446 }
5447 if (priv->ucode_data.v_addr != NULL) {
5448 pci_free_consistent(priv->pci_dev,
5449 priv->ucode_data.len,
5450 priv->ucode_data.v_addr,
5451 priv->ucode_data.p_addr);
5452 priv->ucode_data.v_addr = NULL;
5453 }
5454 if (priv->ucode_data_backup.v_addr != NULL) {
5455 pci_free_consistent(priv->pci_dev,
5456 priv->ucode_data_backup.len,
5457 priv->ucode_data_backup.v_addr,
5458 priv->ucode_data_backup.p_addr);
5459 priv->ucode_data_backup.v_addr = NULL;
5460 }
5461 if (priv->ucode_init.v_addr != NULL) {
5462 pci_free_consistent(priv->pci_dev,
5463 priv->ucode_init.len,
5464 priv->ucode_init.v_addr,
5465 priv->ucode_init.p_addr);
5466 priv->ucode_init.v_addr = NULL;
5467 }
5468 if (priv->ucode_init_data.v_addr != NULL) {
5469 pci_free_consistent(priv->pci_dev,
5470 priv->ucode_init_data.len,
5471 priv->ucode_init_data.v_addr,
5472 priv->ucode_init_data.p_addr);
5473 priv->ucode_init_data.v_addr = NULL;
5474 }
5475 if (priv->ucode_boot.v_addr != NULL) {
5476 pci_free_consistent(priv->pci_dev,
5477 priv->ucode_boot.len,
5478 priv->ucode_boot.v_addr,
5479 priv->ucode_boot.p_addr);
5480 priv->ucode_boot.v_addr = NULL;
5481 }
5482 }
5483
5484 /**
5485 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5486 * looking at all data.
5487 */
5488 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5489 {
5490 u32 val;
5491 u32 save_len = len;
5492 int rc = 0;
5493 u32 errcnt;
5494
5495 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5496
5497 rc = iwl_grab_restricted_access(priv);
5498 if (rc)
5499 return rc;
5500
5501 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5502
5503 errcnt = 0;
5504 for (; len > 0; len -= sizeof(u32), image++) {
5505 /* read data comes through single port, auto-incr addr */
5506 /* NOTE: Use the debugless read so we don't flood kernel log
5507 * if IWL_DL_IO is set */
5508 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5509 if (val != le32_to_cpu(*image)) {
5510 IWL_ERROR("uCode INST section is invalid at "
5511 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5512 save_len - len, val, le32_to_cpu(*image));
5513 rc = -EIO;
5514 errcnt++;
5515 if (errcnt >= 20)
5516 break;
5517 }
5518 }
5519
5520 iwl_release_restricted_access(priv);
5521
5522 if (!errcnt)
5523 IWL_DEBUG_INFO
5524 ("ucode image in INSTRUCTION memory is good\n");
5525
5526 return rc;
5527 }
5528
5529
5530 /**
5531 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5532 * using sample data 100 bytes apart. If these sample points are good,
5533 * it's a pretty good bet that everything between them is good, too.
5534 */
5535 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5536 {
5537 u32 val;
5538 int rc = 0;
5539 u32 errcnt = 0;
5540 u32 i;
5541
5542 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5543
5544 rc = iwl_grab_restricted_access(priv);
5545 if (rc)
5546 return rc;
5547
5548 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5549 /* read data comes through single port, auto-incr addr */
5550 /* NOTE: Use the debugless read so we don't flood kernel log
5551 * if IWL_DL_IO is set */
5552 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5553 i + RTC_INST_LOWER_BOUND);
5554 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5555 if (val != le32_to_cpu(*image)) {
5556 #if 0 /* Enable this if you want to see details */
5557 IWL_ERROR("uCode INST section is invalid at "
5558 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5559 i, val, *image);
5560 #endif
5561 rc = -EIO;
5562 errcnt++;
5563 if (errcnt >= 3)
5564 break;
5565 }
5566 }
5567
5568 iwl_release_restricted_access(priv);
5569
5570 return rc;
5571 }
5572
5573
5574 /**
5575 * iwl_verify_ucode - determine which instruction image is in SRAM,
5576 * and verify its contents
5577 */
5578 static int iwl_verify_ucode(struct iwl_priv *priv)
5579 {
5580 __le32 *image;
5581 u32 len;
5582 int rc = 0;
5583
5584 /* Try bootstrap */
5585 image = (__le32 *)priv->ucode_boot.v_addr;
5586 len = priv->ucode_boot.len;
5587 rc = iwl_verify_inst_sparse(priv, image, len);
5588 if (rc == 0) {
5589 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5590 return 0;
5591 }
5592
5593 /* Try initialize */
5594 image = (__le32 *)priv->ucode_init.v_addr;
5595 len = priv->ucode_init.len;
5596 rc = iwl_verify_inst_sparse(priv, image, len);
5597 if (rc == 0) {
5598 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5599 return 0;
5600 }
5601
5602 /* Try runtime/protocol */
5603 image = (__le32 *)priv->ucode_code.v_addr;
5604 len = priv->ucode_code.len;
5605 rc = iwl_verify_inst_sparse(priv, image, len);
5606 if (rc == 0) {
5607 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5608 return 0;
5609 }
5610
5611 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5612
5613 /* Show first several data entries in instruction SRAM.
5614 * Selection of bootstrap image is arbitrary. */
5615 image = (__le32 *)priv->ucode_boot.v_addr;
5616 len = priv->ucode_boot.len;
5617 rc = iwl_verify_inst_full(priv, image, len);
5618
5619 return rc;
5620 }
5621
5622
5623 /* check contents of special bootstrap uCode SRAM */
5624 static int iwl_verify_bsm(struct iwl_priv *priv)
5625 {
5626 __le32 *image = priv->ucode_boot.v_addr;
5627 u32 len = priv->ucode_boot.len;
5628 u32 reg;
5629 u32 val;
5630
5631 IWL_DEBUG_INFO("Begin verify bsm\n");
5632
5633 /* verify BSM SRAM contents */
5634 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5635 for (reg = BSM_SRAM_LOWER_BOUND;
5636 reg < BSM_SRAM_LOWER_BOUND + len;
5637 reg += sizeof(u32), image ++) {
5638 val = iwl_read_restricted_reg(priv, reg);
5639 if (val != le32_to_cpu(*image)) {
5640 IWL_ERROR("BSM uCode verification failed at "
5641 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5642 BSM_SRAM_LOWER_BOUND,
5643 reg - BSM_SRAM_LOWER_BOUND, len,
5644 val, le32_to_cpu(*image));
5645 return -EIO;
5646 }
5647 }
5648
5649 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5650
5651 return 0;
5652 }
5653
5654 /**
5655 * iwl_load_bsm - Load bootstrap instructions
5656 *
5657 * BSM operation:
5658 *
5659 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5660 * in special SRAM that does not power down during RFKILL. When powering back
5661 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5662 * the bootstrap program into the on-board processor, and starts it.
5663 *
5664 * The bootstrap program loads (via DMA) instructions and data for a new
5665 * program from host DRAM locations indicated by the host driver in the
5666 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5667 * automatically.
5668 *
5669 * When initializing the NIC, the host driver points the BSM to the
5670 * "initialize" uCode image. This uCode sets up some internal data, then
5671 * notifies host via "initialize alive" that it is complete.
5672 *
5673 * The host then replaces the BSM_DRAM_* pointer values to point to the
5674 * normal runtime uCode instructions and a backup uCode data cache buffer
5675 * (filled initially with starting data values for the on-board processor),
5676 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5677 * which begins normal operation.
5678 *
5679 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5680 * the backup data cache in DRAM before SRAM is powered down.
5681 *
5682 * When powering back up, the BSM loads the bootstrap program. This reloads
5683 * the runtime uCode instructions and the backup data cache into SRAM,
5684 * and re-launches the runtime uCode from where it left off.
5685 */
5686 static int iwl_load_bsm(struct iwl_priv *priv)
5687 {
5688 __le32 *image = priv->ucode_boot.v_addr;
5689 u32 len = priv->ucode_boot.len;
5690 dma_addr_t pinst;
5691 dma_addr_t pdata;
5692 u32 inst_len;
5693 u32 data_len;
5694 int rc;
5695 int i;
5696 u32 done;
5697 u32 reg_offset;
5698
5699 IWL_DEBUG_INFO("Begin load bsm\n");
5700
5701 /* make sure bootstrap program is no larger than BSM's SRAM size */
5702 if (len > IWL_MAX_BSM_SIZE)
5703 return -EINVAL;
5704
5705 /* Tell bootstrap uCode where to find the "Initialize" uCode
5706 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5707 * NOTE: iwl_initialize_alive_start() will replace these values,
5708 * after the "initialize" uCode has run, to point to
5709 * runtime/protocol instructions and backup data cache. */
5710 pinst = priv->ucode_init.p_addr;
5711 pdata = priv->ucode_init_data.p_addr;
5712 inst_len = priv->ucode_init.len;
5713 data_len = priv->ucode_init_data.len;
5714
5715 rc = iwl_grab_restricted_access(priv);
5716 if (rc)
5717 return rc;
5718
5719 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5720 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5721 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5722 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5723
5724 /* Fill BSM memory with bootstrap instructions */
5725 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5726 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5727 reg_offset += sizeof(u32), image++)
5728 _iwl_write_restricted_reg(priv, reg_offset,
5729 le32_to_cpu(*image));
5730
5731 rc = iwl_verify_bsm(priv);
5732 if (rc) {
5733 iwl_release_restricted_access(priv);
5734 return rc;
5735 }
5736
5737 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5738 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5739 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5740 RTC_INST_LOWER_BOUND);
5741 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5742
5743 /* Load bootstrap code into instruction SRAM now,
5744 * to prepare to load "initialize" uCode */
5745 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5746 BSM_WR_CTRL_REG_BIT_START);
5747
5748 /* Wait for load of bootstrap uCode to finish */
5749 for (i = 0; i < 100; i++) {
5750 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5751 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5752 break;
5753 udelay(10);
5754 }
5755 if (i < 100)
5756 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5757 else {
5758 IWL_ERROR("BSM write did not complete!\n");
5759 return -EIO;
5760 }
5761
5762 /* Enable future boot loads whenever power management unit triggers it
5763 * (e.g. when powering back up after power-save shutdown) */
5764 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5765 BSM_WR_CTRL_REG_BIT_START_EN);
5766
5767 iwl_release_restricted_access(priv);
5768
5769 return 0;
5770 }
5771
5772 static void iwl_nic_start(struct iwl_priv *priv)
5773 {
5774 /* Remove all resets to allow NIC to operate */
5775 iwl_write32(priv, CSR_RESET, 0);
5776 }
5777
5778 /**
5779 * iwl_read_ucode - Read uCode images from disk file.
5780 *
5781 * Copy into buffers for card to fetch via bus-mastering
5782 */
5783 static int iwl_read_ucode(struct iwl_priv *priv)
5784 {
5785 struct iwl_ucode *ucode;
5786 int rc = 0;
5787 const struct firmware *ucode_raw;
5788 /* firmware file name contains uCode/driver compatibility version */
5789 const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5790 u8 *src;
5791 size_t len;
5792 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5793
5794 /* Ask kernel firmware_class module to get the boot firmware off disk.
5795 * request_firmware() is synchronous, file is in memory on return. */
5796 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5797 if (rc < 0) {
5798 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5799 goto error;
5800 }
5801
5802 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5803 name, ucode_raw->size);
5804
5805 /* Make sure that we got at least our header! */
5806 if (ucode_raw->size < sizeof(*ucode)) {
5807 IWL_ERROR("File size way too small!\n");
5808 rc = -EINVAL;
5809 goto err_release;
5810 }
5811
5812 /* Data from ucode file: header followed by uCode images */
5813 ucode = (void *)ucode_raw->data;
5814
5815 ver = le32_to_cpu(ucode->ver);
5816 inst_size = le32_to_cpu(ucode->inst_size);
5817 data_size = le32_to_cpu(ucode->data_size);
5818 init_size = le32_to_cpu(ucode->init_size);
5819 init_data_size = le32_to_cpu(ucode->init_data_size);
5820 boot_size = le32_to_cpu(ucode->boot_size);
5821
5822 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5823 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5824 inst_size);
5825 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5826 data_size);
5827 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5828 init_size);
5829 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5830 init_data_size);
5831 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5832 boot_size);
5833
5834 /* Verify size of file vs. image size info in file's header */
5835 if (ucode_raw->size < sizeof(*ucode) +
5836 inst_size + data_size + init_size +
5837 init_data_size + boot_size) {
5838
5839 IWL_DEBUG_INFO("uCode file size %d too small\n",
5840 (int)ucode_raw->size);
5841 rc = -EINVAL;
5842 goto err_release;
5843 }
5844
5845 /* Verify that uCode images will fit in card's SRAM */
5846 if (inst_size > IWL_MAX_INST_SIZE) {
5847 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5848 (int)inst_size);
5849 rc = -EINVAL;
5850 goto err_release;
5851 }
5852
5853 if (data_size > IWL_MAX_DATA_SIZE) {
5854 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5855 (int)data_size);
5856 rc = -EINVAL;
5857 goto err_release;
5858 }
5859 if (init_size > IWL_MAX_INST_SIZE) {
5860 IWL_DEBUG_INFO
5861 ("uCode init instr len %d too large to fit in card\n",
5862 (int)init_size);
5863 rc = -EINVAL;
5864 goto err_release;
5865 }
5866 if (init_data_size > IWL_MAX_DATA_SIZE) {
5867 IWL_DEBUG_INFO
5868 ("uCode init data len %d too large to fit in card\n",
5869 (int)init_data_size);
5870 rc = -EINVAL;
5871 goto err_release;
5872 }
5873 if (boot_size > IWL_MAX_BSM_SIZE) {
5874 IWL_DEBUG_INFO
5875 ("uCode boot instr len %d too large to fit in bsm\n",
5876 (int)boot_size);
5877 rc = -EINVAL;
5878 goto err_release;
5879 }
5880
5881 /* Allocate ucode buffers for card's bus-master loading ... */
5882
5883 /* Runtime instructions and 2 copies of data:
5884 * 1) unmodified from disk
5885 * 2) backup cache for save/restore during power-downs */
5886 priv->ucode_code.len = inst_size;
5887 priv->ucode_code.v_addr =
5888 pci_alloc_consistent(priv->pci_dev,
5889 priv->ucode_code.len,
5890 &(priv->ucode_code.p_addr));
5891
5892 priv->ucode_data.len = data_size;
5893 priv->ucode_data.v_addr =
5894 pci_alloc_consistent(priv->pci_dev,
5895 priv->ucode_data.len,
5896 &(priv->ucode_data.p_addr));
5897
5898 priv->ucode_data_backup.len = data_size;
5899 priv->ucode_data_backup.v_addr =
5900 pci_alloc_consistent(priv->pci_dev,
5901 priv->ucode_data_backup.len,
5902 &(priv->ucode_data_backup.p_addr));
5903
5904
5905 /* Initialization instructions and data */
5906 priv->ucode_init.len = init_size;
5907 priv->ucode_init.v_addr =
5908 pci_alloc_consistent(priv->pci_dev,
5909 priv->ucode_init.len,
5910 &(priv->ucode_init.p_addr));
5911
5912 priv->ucode_init_data.len = init_data_size;
5913 priv->ucode_init_data.v_addr =
5914 pci_alloc_consistent(priv->pci_dev,
5915 priv->ucode_init_data.len,
5916 &(priv->ucode_init_data.p_addr));
5917
5918 /* Bootstrap (instructions only, no data) */
5919 priv->ucode_boot.len = boot_size;
5920 priv->ucode_boot.v_addr =
5921 pci_alloc_consistent(priv->pci_dev,
5922 priv->ucode_boot.len,
5923 &(priv->ucode_boot.p_addr));
5924
5925 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5926 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5927 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5928 goto err_pci_alloc;
5929
5930 /* Copy images into buffers for card's bus-master reads ... */
5931
5932 /* Runtime instructions (first block of data in file) */
5933 src = &ucode->data[0];
5934 len = priv->ucode_code.len;
5935 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5936 (int)len);
5937 memcpy(priv->ucode_code.v_addr, src, len);
5938 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5939 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5940
5941 /* Runtime data (2nd block)
5942 * NOTE: Copy into backup buffer will be done in iwl_up() */
5943 src = &ucode->data[inst_size];
5944 len = priv->ucode_data.len;
5945 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5946 (int)len);
5947 memcpy(priv->ucode_data.v_addr, src, len);
5948 memcpy(priv->ucode_data_backup.v_addr, src, len);
5949
5950 /* Initialization instructions (3rd block) */
5951 if (init_size) {
5952 src = &ucode->data[inst_size + data_size];
5953 len = priv->ucode_init.len;
5954 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5955 (int)len);
5956 memcpy(priv->ucode_init.v_addr, src, len);
5957 }
5958
5959 /* Initialization data (4th block) */
5960 if (init_data_size) {
5961 src = &ucode->data[inst_size + data_size + init_size];
5962 len = priv->ucode_init_data.len;
5963 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5964 (int)len);
5965 memcpy(priv->ucode_init_data.v_addr, src, len);
5966 }
5967
5968 /* Bootstrap instructions (5th block) */
5969 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5970 len = priv->ucode_boot.len;
5971 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5972 (int)len);
5973 memcpy(priv->ucode_boot.v_addr, src, len);
5974
5975 /* We have our copies now, allow OS release its copies */
5976 release_firmware(ucode_raw);
5977 return 0;
5978
5979 err_pci_alloc:
5980 IWL_ERROR("failed to allocate pci memory\n");
5981 rc = -ENOMEM;
5982 iwl_dealloc_ucode_pci(priv);
5983
5984 err_release:
5985 release_firmware(ucode_raw);
5986
5987 error:
5988 return rc;
5989 }
5990
5991
5992 /**
5993 * iwl_set_ucode_ptrs - Set uCode address location
5994 *
5995 * Tell initialization uCode where to find runtime uCode.
5996 *
5997 * BSM registers initially contain pointers to initialization uCode.
5998 * We need to replace them to load runtime uCode inst and data,
5999 * and to save runtime data when powering down.
6000 */
6001 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6002 {
6003 dma_addr_t pinst;
6004 dma_addr_t pdata;
6005 int rc = 0;
6006 unsigned long flags;
6007
6008 /* bits 31:0 for 3945 */
6009 pinst = priv->ucode_code.p_addr;
6010 pdata = priv->ucode_data_backup.p_addr;
6011
6012 spin_lock_irqsave(&priv->lock, flags);
6013 rc = iwl_grab_restricted_access(priv);
6014 if (rc) {
6015 spin_unlock_irqrestore(&priv->lock, flags);
6016 return rc;
6017 }
6018
6019 /* Tell bootstrap uCode where to find image to load */
6020 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6021 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6022 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6023 priv->ucode_data.len);
6024
6025 /* Inst bytecount must be last to set up, bit 31 signals uCode
6026 * that all new ptr/size info is in place */
6027 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6028 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6029
6030 iwl_release_restricted_access(priv);
6031
6032 spin_unlock_irqrestore(&priv->lock, flags);
6033
6034 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6035
6036 return rc;
6037 }
6038
6039 /**
6040 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6041 *
6042 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6043 *
6044 * The 4965 "initialize" ALIVE reply contains calibration data for:
6045 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6046 * (3945 does not contain this data).
6047 *
6048 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6049 */
6050 static void iwl_init_alive_start(struct iwl_priv *priv)
6051 {
6052 /* Check alive response for "valid" sign from uCode */
6053 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6054 /* We had an error bringing up the hardware, so take it
6055 * all the way back down so we can try again */
6056 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6057 goto restart;
6058 }
6059
6060 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6061 * This is a paranoid check, because we would not have gotten the
6062 * "initialize" alive if code weren't properly loaded. */
6063 if (iwl_verify_ucode(priv)) {
6064 /* Runtime instruction load was bad;
6065 * take it all the way back down so we can try again */
6066 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6067 goto restart;
6068 }
6069
6070 /* Send pointers to protocol/runtime uCode image ... init code will
6071 * load and launch runtime uCode, which will send us another "Alive"
6072 * notification. */
6073 IWL_DEBUG_INFO("Initialization Alive received.\n");
6074 if (iwl_set_ucode_ptrs(priv)) {
6075 /* Runtime instruction load won't happen;
6076 * take it all the way back down so we can try again */
6077 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6078 goto restart;
6079 }
6080 return;
6081
6082 restart:
6083 queue_work(priv->workqueue, &priv->restart);
6084 }
6085
6086
6087 /**
6088 * iwl_alive_start - called after REPLY_ALIVE notification received
6089 * from protocol/runtime uCode (initialization uCode's
6090 * Alive gets handled by iwl_init_alive_start()).
6091 */
6092 static void iwl_alive_start(struct iwl_priv *priv)
6093 {
6094 int rc = 0;
6095 int thermal_spin = 0;
6096 u32 rfkill;
6097
6098 IWL_DEBUG_INFO("Runtime Alive received.\n");
6099
6100 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6101 /* We had an error bringing up the hardware, so take it
6102 * all the way back down so we can try again */
6103 IWL_DEBUG_INFO("Alive failed.\n");
6104 goto restart;
6105 }
6106
6107 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6108 * This is a paranoid check, because we would not have gotten the
6109 * "runtime" alive if code weren't properly loaded. */
6110 if (iwl_verify_ucode(priv)) {
6111 /* Runtime instruction load was bad;
6112 * take it all the way back down so we can try again */
6113 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6114 goto restart;
6115 }
6116
6117 iwl_clear_stations_table(priv);
6118
6119 rc = iwl_grab_restricted_access(priv);
6120 if (rc) {
6121 IWL_WARNING("Can not read rfkill status from adapter\n");
6122 return;
6123 }
6124
6125 rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6126 IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6127 iwl_release_restricted_access(priv);
6128
6129 if (rfkill & 0x1) {
6130 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6131 /* if rfkill is not on, then wait for thermal
6132 * sensor in adapter to kick in */
6133 while (iwl_hw_get_temperature(priv) == 0) {
6134 thermal_spin++;
6135 udelay(10);
6136 }
6137
6138 if (thermal_spin)
6139 IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6140 thermal_spin * 10);
6141 } else
6142 set_bit(STATUS_RF_KILL_HW, &priv->status);
6143
6144 /* After the ALIVE response, we can process host commands */
6145 set_bit(STATUS_ALIVE, &priv->status);
6146
6147 /* Clear out the uCode error bit if it is set */
6148 clear_bit(STATUS_FW_ERROR, &priv->status);
6149
6150 rc = iwl_init_channel_map(priv);
6151 if (rc) {
6152 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6153 return;
6154 }
6155
6156 iwl_init_geos(priv);
6157
6158 if (iwl_is_rfkill(priv))
6159 return;
6160
6161 if (!priv->mac80211_registered) {
6162 /* Unlock so any user space entry points can call back into
6163 * the driver without a deadlock... */
6164 mutex_unlock(&priv->mutex);
6165 iwl_rate_control_register(priv->hw);
6166 rc = ieee80211_register_hw(priv->hw);
6167 priv->hw->conf.beacon_int = 100;
6168 mutex_lock(&priv->mutex);
6169
6170 if (rc) {
6171 IWL_ERROR("Failed to register network "
6172 "device (error %d)\n", rc);
6173 return;
6174 }
6175
6176 priv->mac80211_registered = 1;
6177
6178 iwl_reset_channel_flag(priv);
6179 } else
6180 ieee80211_start_queues(priv->hw);
6181
6182 priv->active_rate = priv->rates_mask;
6183 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6184
6185 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6186
6187 if (iwl_is_associated(priv)) {
6188 struct iwl_rxon_cmd *active_rxon =
6189 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6190
6191 memcpy(&priv->staging_rxon, &priv->active_rxon,
6192 sizeof(priv->staging_rxon));
6193 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6194 } else {
6195 /* Initialize our rx_config data */
6196 iwl_connection_init_rx_config(priv);
6197 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6198 }
6199
6200 /* Configure BT coexistence */
6201 iwl_send_bt_config(priv);
6202
6203 /* Configure the adapter for unassociated operation */
6204 iwl_commit_rxon(priv);
6205
6206 /* At this point, the NIC is initialized and operational */
6207 priv->notif_missed_beacons = 0;
6208 set_bit(STATUS_READY, &priv->status);
6209
6210 iwl3945_reg_txpower_periodic(priv);
6211
6212 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6213
6214 if (priv->error_recovering)
6215 iwl_error_recovery(priv);
6216
6217 return;
6218
6219 restart:
6220 queue_work(priv->workqueue, &priv->restart);
6221 }
6222
6223 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6224
6225 static void __iwl_down(struct iwl_priv *priv)
6226 {
6227 unsigned long flags;
6228 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6229 struct ieee80211_conf *conf = NULL;
6230
6231 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6232
6233 conf = ieee80211_get_hw_conf(priv->hw);
6234
6235 if (!exit_pending)
6236 set_bit(STATUS_EXIT_PENDING, &priv->status);
6237
6238 iwl_clear_stations_table(priv);
6239
6240 /* Unblock any waiting calls */
6241 wake_up_interruptible_all(&priv->wait_command_queue);
6242
6243 iwl_cancel_deferred_work(priv);
6244
6245 /* Wipe out the EXIT_PENDING status bit if we are not actually
6246 * exiting the module */
6247 if (!exit_pending)
6248 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6249
6250 /* stop and reset the on-board processor */
6251 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6252
6253 /* tell the device to stop sending interrupts */
6254 iwl_disable_interrupts(priv);
6255
6256 if (priv->mac80211_registered)
6257 ieee80211_stop_queues(priv->hw);
6258
6259 /* If we have not previously called iwl_init() then
6260 * clear all bits but the RF Kill and SUSPEND bits and return */
6261 if (!iwl_is_init(priv)) {
6262 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6263 STATUS_RF_KILL_HW |
6264 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6265 STATUS_RF_KILL_SW |
6266 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6267 STATUS_IN_SUSPEND;
6268 goto exit;
6269 }
6270
6271 /* ...otherwise clear out all the status bits but the RF Kill and
6272 * SUSPEND bits and continue taking the NIC down. */
6273 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6274 STATUS_RF_KILL_HW |
6275 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6276 STATUS_RF_KILL_SW |
6277 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6278 STATUS_IN_SUSPEND |
6279 test_bit(STATUS_FW_ERROR, &priv->status) <<
6280 STATUS_FW_ERROR;
6281
6282 spin_lock_irqsave(&priv->lock, flags);
6283 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6284 spin_unlock_irqrestore(&priv->lock, flags);
6285
6286 iwl_hw_txq_ctx_stop(priv);
6287 iwl_hw_rxq_stop(priv);
6288
6289 spin_lock_irqsave(&priv->lock, flags);
6290 if (!iwl_grab_restricted_access(priv)) {
6291 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6292 APMG_CLK_VAL_DMA_CLK_RQT);
6293 iwl_release_restricted_access(priv);
6294 }
6295 spin_unlock_irqrestore(&priv->lock, flags);
6296
6297 udelay(5);
6298
6299 iwl_hw_nic_stop_master(priv);
6300 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6301 iwl_hw_nic_reset(priv);
6302
6303 exit:
6304 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6305
6306 if (priv->ibss_beacon)
6307 dev_kfree_skb(priv->ibss_beacon);
6308 priv->ibss_beacon = NULL;
6309
6310 /* clear out any free frames */
6311 iwl_clear_free_frames(priv);
6312 }
6313
6314 static void iwl_down(struct iwl_priv *priv)
6315 {
6316 mutex_lock(&priv->mutex);
6317 __iwl_down(priv);
6318 mutex_unlock(&priv->mutex);
6319 }
6320
6321 #define MAX_HW_RESTARTS 5
6322
6323 static int __iwl_up(struct iwl_priv *priv)
6324 {
6325 int rc, i;
6326
6327 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6328 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6329 return -EIO;
6330 }
6331
6332 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6333 IWL_WARNING("Radio disabled by SW RF kill (module "
6334 "parameter)\n");
6335 return 0;
6336 }
6337
6338 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6339
6340 rc = iwl_hw_nic_init(priv);
6341 if (rc) {
6342 IWL_ERROR("Unable to int nic\n");
6343 return rc;
6344 }
6345
6346 /* make sure rfkill handshake bits are cleared */
6347 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6348 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6349 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6350
6351 /* clear (again), then enable host interrupts */
6352 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6353 iwl_enable_interrupts(priv);
6354
6355 /* really make sure rfkill handshake bits are cleared */
6356 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6357 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6358
6359 /* Copy original ucode data image from disk into backup cache.
6360 * This will be used to initialize the on-board processor's
6361 * data SRAM for a clean start when the runtime program first loads. */
6362 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6363 priv->ucode_data.len);
6364
6365 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6366
6367 iwl_clear_stations_table(priv);
6368
6369 /* load bootstrap state machine,
6370 * load bootstrap program into processor's memory,
6371 * prepare to load the "initialize" uCode */
6372 rc = iwl_load_bsm(priv);
6373
6374 if (rc) {
6375 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6376 continue;
6377 }
6378
6379 /* start card; "initialize" will load runtime ucode */
6380 iwl_nic_start(priv);
6381
6382 /* MAC Address location in EEPROM same for 3945/4965 */
6383 get_eeprom_mac(priv, priv->mac_addr);
6384 IWL_DEBUG_INFO("MAC address: " MAC_FMT "\n",
6385 MAC_ARG(priv->mac_addr));
6386
6387 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6388
6389 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6390
6391 return 0;
6392 }
6393
6394 set_bit(STATUS_EXIT_PENDING, &priv->status);
6395 __iwl_down(priv);
6396
6397 /* tried to restart and config the device for as long as our
6398 * patience could withstand */
6399 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6400 return -EIO;
6401 }
6402
6403
6404 /*****************************************************************************
6405 *
6406 * Workqueue callbacks
6407 *
6408 *****************************************************************************/
6409
6410 static void iwl_bg_init_alive_start(struct work_struct *data)
6411 {
6412 struct iwl_priv *priv =
6413 container_of(data, struct iwl_priv, init_alive_start.work);
6414
6415 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6416 return;
6417
6418 mutex_lock(&priv->mutex);
6419 iwl_init_alive_start(priv);
6420 mutex_unlock(&priv->mutex);
6421 }
6422
6423 static void iwl_bg_alive_start(struct work_struct *data)
6424 {
6425 struct iwl_priv *priv =
6426 container_of(data, struct iwl_priv, alive_start.work);
6427
6428 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6429 return;
6430
6431 mutex_lock(&priv->mutex);
6432 iwl_alive_start(priv);
6433 mutex_unlock(&priv->mutex);
6434 }
6435
6436 static void iwl_bg_rf_kill(struct work_struct *work)
6437 {
6438 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6439
6440 wake_up_interruptible(&priv->wait_command_queue);
6441
6442 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6443 return;
6444
6445 mutex_lock(&priv->mutex);
6446
6447 if (!iwl_is_rfkill(priv)) {
6448 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6449 "HW and/or SW RF Kill no longer active, restarting "
6450 "device\n");
6451 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6452 queue_work(priv->workqueue, &priv->restart);
6453 } else {
6454
6455 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6456 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6457 "disabled by SW switch\n");
6458 else
6459 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6460 "Kill switch must be turned off for "
6461 "wireless networking to work.\n");
6462 }
6463 mutex_unlock(&priv->mutex);
6464 }
6465
6466 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6467
6468 static void iwl_bg_scan_check(struct work_struct *data)
6469 {
6470 struct iwl_priv *priv =
6471 container_of(data, struct iwl_priv, scan_check.work);
6472
6473 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6474 return;
6475
6476 mutex_lock(&priv->mutex);
6477 if (test_bit(STATUS_SCANNING, &priv->status) ||
6478 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6479 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6480 "Scan completion watchdog resetting adapter (%dms)\n",
6481 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6482 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6483 queue_work(priv->workqueue, &priv->restart);
6484 }
6485 mutex_unlock(&priv->mutex);
6486 }
6487
6488 static void iwl_bg_request_scan(struct work_struct *data)
6489 {
6490 struct iwl_priv *priv =
6491 container_of(data, struct iwl_priv, request_scan);
6492 struct iwl_host_cmd cmd = {
6493 .id = REPLY_SCAN_CMD,
6494 .len = sizeof(struct iwl_scan_cmd),
6495 .meta.flags = CMD_SIZE_HUGE,
6496 };
6497 int rc = 0;
6498 struct iwl_scan_cmd *scan;
6499 struct ieee80211_conf *conf = NULL;
6500 u8 direct_mask;
6501 int phymode;
6502
6503 conf = ieee80211_get_hw_conf(priv->hw);
6504
6505 mutex_lock(&priv->mutex);
6506
6507 if (!iwl_is_ready(priv)) {
6508 IWL_WARNING("request scan called when driver not ready.\n");
6509 goto done;
6510 }
6511
6512 /* Make sure the scan wasn't cancelled before this queued work
6513 * was given the chance to run... */
6514 if (!test_bit(STATUS_SCANNING, &priv->status))
6515 goto done;
6516
6517 /* This should never be called or scheduled if there is currently
6518 * a scan active in the hardware. */
6519 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6520 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6521 "Ignoring second request.\n");
6522 rc = -EIO;
6523 goto done;
6524 }
6525
6526 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6527 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6528 goto done;
6529 }
6530
6531 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6532 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6533 goto done;
6534 }
6535
6536 if (iwl_is_rfkill(priv)) {
6537 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6538 goto done;
6539 }
6540
6541 if (!test_bit(STATUS_READY, &priv->status)) {
6542 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6543 goto done;
6544 }
6545
6546 if (!priv->scan_bands) {
6547 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6548 goto done;
6549 }
6550
6551 if (!priv->scan) {
6552 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6553 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6554 if (!priv->scan) {
6555 rc = -ENOMEM;
6556 goto done;
6557 }
6558 }
6559 scan = priv->scan;
6560 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6561
6562 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6563 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6564
6565 if (iwl_is_associated(priv)) {
6566 u16 interval = 0;
6567 u32 extra;
6568 u32 suspend_time = 100;
6569 u32 scan_suspend_time = 100;
6570 unsigned long flags;
6571
6572 IWL_DEBUG_INFO("Scanning while associated...\n");
6573
6574 spin_lock_irqsave(&priv->lock, flags);
6575 interval = priv->beacon_int;
6576 spin_unlock_irqrestore(&priv->lock, flags);
6577
6578 scan->suspend_time = 0;
6579 scan->max_out_time = cpu_to_le32(600 * 1024);
6580 if (!interval)
6581 interval = suspend_time;
6582 /*
6583 * suspend time format:
6584 * 0-19: beacon interval in usec (time before exec.)
6585 * 20-23: 0
6586 * 24-31: number of beacons (suspend between channels)
6587 */
6588
6589 extra = (suspend_time / interval) << 24;
6590 scan_suspend_time = 0xFF0FFFFF &
6591 (extra | ((suspend_time % interval) * 1024));
6592
6593 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6594 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6595 scan_suspend_time, interval);
6596 }
6597
6598 /* We should add the ability for user to lock to PASSIVE ONLY */
6599 if (priv->one_direct_scan) {
6600 IWL_DEBUG_SCAN
6601 ("Kicking off one direct scan for '%s'\n",
6602 iwl_escape_essid(priv->direct_ssid,
6603 priv->direct_ssid_len));
6604 scan->direct_scan[0].id = WLAN_EID_SSID;
6605 scan->direct_scan[0].len = priv->direct_ssid_len;
6606 memcpy(scan->direct_scan[0].ssid,
6607 priv->direct_ssid, priv->direct_ssid_len);
6608 direct_mask = 1;
6609 } else if (!iwl_is_associated(priv)) {
6610 scan->direct_scan[0].id = WLAN_EID_SSID;
6611 scan->direct_scan[0].len = priv->essid_len;
6612 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6613 direct_mask = 1;
6614 } else
6615 direct_mask = 0;
6616
6617 /* We don't build a direct scan probe request; the uCode will do
6618 * that based on the direct_mask added to each channel entry */
6619 scan->tx_cmd.len = cpu_to_le16(
6620 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6621 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6622 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6623 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6624 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6625
6626 /* flags + rate selection */
6627
6628 switch (priv->scan_bands) {
6629 case 2:
6630 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6631 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6632 scan->good_CRC_th = 0;
6633 phymode = MODE_IEEE80211G;
6634 break;
6635
6636 case 1:
6637 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6638 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6639 phymode = MODE_IEEE80211A;
6640 break;
6641
6642 default:
6643 IWL_WARNING("Invalid scan band count\n");
6644 goto done;
6645 }
6646
6647 /* select Rx antennas */
6648 scan->flags |= iwl3945_get_antenna_flags(priv);
6649
6650 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6651 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6652
6653 if (direct_mask)
6654 IWL_DEBUG_SCAN
6655 ("Initiating direct scan for %s.\n",
6656 iwl_escape_essid(priv->essid, priv->essid_len));
6657 else
6658 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6659
6660 scan->channel_count =
6661 iwl_get_channels_for_scan(
6662 priv, phymode, 1, /* active */
6663 direct_mask,
6664 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6665
6666 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6667 scan->channel_count * sizeof(struct iwl_scan_channel);
6668 cmd.data = scan;
6669 scan->len = cpu_to_le16(cmd.len);
6670
6671 set_bit(STATUS_SCAN_HW, &priv->status);
6672 rc = iwl_send_cmd_sync(priv, &cmd);
6673 if (rc)
6674 goto done;
6675
6676 queue_delayed_work(priv->workqueue, &priv->scan_check,
6677 IWL_SCAN_CHECK_WATCHDOG);
6678
6679 mutex_unlock(&priv->mutex);
6680 return;
6681
6682 done:
6683 /* inform mac80211 sacn aborted */
6684 queue_work(priv->workqueue, &priv->scan_completed);
6685 mutex_unlock(&priv->mutex);
6686 }
6687
6688 static void iwl_bg_up(struct work_struct *data)
6689 {
6690 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6691
6692 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6693 return;
6694
6695 mutex_lock(&priv->mutex);
6696 __iwl_up(priv);
6697 mutex_unlock(&priv->mutex);
6698 }
6699
6700 static void iwl_bg_restart(struct work_struct *data)
6701 {
6702 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6703
6704 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6705 return;
6706
6707 iwl_down(priv);
6708 queue_work(priv->workqueue, &priv->up);
6709 }
6710
6711 static void iwl_bg_rx_replenish(struct work_struct *data)
6712 {
6713 struct iwl_priv *priv =
6714 container_of(data, struct iwl_priv, rx_replenish);
6715
6716 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6717 return;
6718
6719 mutex_lock(&priv->mutex);
6720 iwl_rx_replenish(priv);
6721 mutex_unlock(&priv->mutex);
6722 }
6723
6724 static void iwl_bg_post_associate(struct work_struct *data)
6725 {
6726 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6727 post_associate.work);
6728
6729 int rc = 0;
6730 struct ieee80211_conf *conf = NULL;
6731
6732 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6733 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6734 return;
6735 }
6736
6737
6738 IWL_DEBUG_ASSOC("Associated as %d to: " MAC_FMT "\n",
6739 priv->assoc_id, MAC_ARG(priv->active_rxon.bssid_addr));
6740
6741 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6742 return;
6743
6744 mutex_lock(&priv->mutex);
6745
6746 conf = ieee80211_get_hw_conf(priv->hw);
6747
6748 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6749 iwl_commit_rxon(priv);
6750
6751 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6752 iwl_setup_rxon_timing(priv);
6753 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6754 sizeof(priv->rxon_timing), &priv->rxon_timing);
6755 if (rc)
6756 IWL_WARNING("REPLY_RXON_TIMING failed - "
6757 "Attempting to continue.\n");
6758
6759 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6760
6761 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6762
6763 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6764 priv->assoc_id, priv->beacon_int);
6765
6766 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6767 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6768 else
6769 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6770
6771 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6772 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6773 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6774 else
6775 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6776
6777 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6778 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6779
6780 }
6781
6782 iwl_commit_rxon(priv);
6783
6784 switch (priv->iw_mode) {
6785 case IEEE80211_IF_TYPE_STA:
6786 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6787 break;
6788
6789 case IEEE80211_IF_TYPE_IBSS:
6790
6791 /* clear out the station table */
6792 iwl_clear_stations_table(priv);
6793
6794 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
6795 iwl_rxon_add_station(priv, priv->bssid, 0);
6796 iwl3945_sync_sta(priv, IWL_STA_ID,
6797 (priv->phymode == MODE_IEEE80211A)?
6798 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6799 CMD_ASYNC);
6800 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6801 iwl_send_beacon_cmd(priv);
6802
6803 break;
6804
6805 default:
6806 IWL_ERROR("%s Should not be called in %d mode\n",
6807 __FUNCTION__, priv->iw_mode);
6808 break;
6809 }
6810
6811 iwl_sequence_reset(priv);
6812
6813 #ifdef CONFIG_IWLWIFI_QOS
6814 iwl_activate_qos(priv, 0);
6815 #endif /* CONFIG_IWLWIFI_QOS */
6816 mutex_unlock(&priv->mutex);
6817 }
6818
6819 static void iwl_bg_abort_scan(struct work_struct *work)
6820 {
6821 struct iwl_priv *priv = container_of(work, struct iwl_priv,
6822 abort_scan);
6823
6824 if (!iwl_is_ready(priv))
6825 return;
6826
6827 mutex_lock(&priv->mutex);
6828
6829 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6830 iwl_send_scan_abort(priv);
6831
6832 mutex_unlock(&priv->mutex);
6833 }
6834
6835 static void iwl_bg_scan_completed(struct work_struct *work)
6836 {
6837 struct iwl_priv *priv =
6838 container_of(work, struct iwl_priv, scan_completed);
6839
6840 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6841
6842 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6843 return;
6844
6845 ieee80211_scan_completed(priv->hw);
6846
6847 /* Since setting the TXPOWER may have been deferred while
6848 * performing the scan, fire one off */
6849 mutex_lock(&priv->mutex);
6850 iwl_hw_reg_send_txpower(priv);
6851 mutex_unlock(&priv->mutex);
6852 }
6853
6854 /*****************************************************************************
6855 *
6856 * mac80211 entry point functions
6857 *
6858 *****************************************************************************/
6859
6860 static int iwl_mac_open(struct ieee80211_hw *hw)
6861 {
6862 struct iwl_priv *priv = hw->priv;
6863
6864 IWL_DEBUG_MAC80211("enter\n");
6865
6866 /* we should be verifying the device is ready to be opened */
6867 mutex_lock(&priv->mutex);
6868
6869 priv->is_open = 1;
6870
6871 if (!iwl_is_rfkill(priv))
6872 ieee80211_start_queues(priv->hw);
6873
6874 mutex_unlock(&priv->mutex);
6875 IWL_DEBUG_MAC80211("leave\n");
6876 return 0;
6877 }
6878
6879 static int iwl_mac_stop(struct ieee80211_hw *hw)
6880 {
6881 struct iwl_priv *priv = hw->priv;
6882
6883 IWL_DEBUG_MAC80211("enter\n");
6884 priv->is_open = 0;
6885 /*netif_stop_queue(dev); */
6886 flush_workqueue(priv->workqueue);
6887 IWL_DEBUG_MAC80211("leave\n");
6888
6889 return 0;
6890 }
6891
6892 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6893 struct ieee80211_tx_control *ctl)
6894 {
6895 struct iwl_priv *priv = hw->priv;
6896
6897 IWL_DEBUG_MAC80211("enter\n");
6898
6899 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6900 IWL_DEBUG_MAC80211("leave - monitor\n");
6901 return -1;
6902 }
6903
6904 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6905 ctl->tx_rate);
6906
6907 if (iwl_tx_skb(priv, skb, ctl))
6908 dev_kfree_skb_any(skb);
6909
6910 IWL_DEBUG_MAC80211("leave\n");
6911 return 0;
6912 }
6913
6914 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6915 struct ieee80211_if_init_conf *conf)
6916 {
6917 struct iwl_priv *priv = hw->priv;
6918 unsigned long flags;
6919
6920 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6921 if (conf->mac_addr)
6922 IWL_DEBUG_MAC80211("enter: MAC " MAC_FMT "\n",
6923 MAC_ARG(conf->mac_addr));
6924
6925 if (priv->interface_id) {
6926 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6927 return 0;
6928 }
6929
6930 spin_lock_irqsave(&priv->lock, flags);
6931 priv->interface_id = conf->if_id;
6932
6933 spin_unlock_irqrestore(&priv->lock, flags);
6934
6935 mutex_lock(&priv->mutex);
6936 iwl_set_mode(priv, conf->type);
6937
6938 IWL_DEBUG_MAC80211("leave\n");
6939 mutex_unlock(&priv->mutex);
6940
6941 return 0;
6942 }
6943
6944 /**
6945 * iwl_mac_config - mac80211 config callback
6946 *
6947 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6948 * be set inappropriately and the driver currently sets the hardware up to
6949 * use it whenever needed.
6950 */
6951 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6952 {
6953 struct iwl_priv *priv = hw->priv;
6954 const struct iwl_channel_info *ch_info;
6955 unsigned long flags;
6956
6957 mutex_lock(&priv->mutex);
6958 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6959
6960 if (!iwl_is_ready(priv)) {
6961 IWL_DEBUG_MAC80211("leave - not ready\n");
6962 mutex_unlock(&priv->mutex);
6963 return -EIO;
6964 }
6965
6966 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6967 * what is exposed through include/ declrations */
6968 if (unlikely(!iwl_param_disable_hw_scan &&
6969 test_bit(STATUS_SCANNING, &priv->status))) {
6970 IWL_DEBUG_MAC80211("leave - scanning\n");
6971 mutex_unlock(&priv->mutex);
6972 return 0;
6973 }
6974
6975 spin_lock_irqsave(&priv->lock, flags);
6976
6977 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6978 if (!is_channel_valid(ch_info)) {
6979 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6980 conf->channel, conf->phymode);
6981 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6982 spin_unlock_irqrestore(&priv->lock, flags);
6983 mutex_unlock(&priv->mutex);
6984 return -EINVAL;
6985 }
6986
6987 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6988
6989 iwl_set_flags_for_phymode(priv, conf->phymode);
6990
6991 /* The list of supported rates and rate mask can be different
6992 * for each phymode; since the phymode may have changed, reset
6993 * the rate mask to what mac80211 lists */
6994 iwl_set_rate(priv);
6995
6996 spin_unlock_irqrestore(&priv->lock, flags);
6997
6998 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6999 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7000 iwl_hw_channel_switch(priv, conf->channel);
7001 mutex_unlock(&priv->mutex);
7002 return 0;
7003 }
7004 #endif
7005
7006 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7007
7008 if (!conf->radio_enabled) {
7009 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7010 mutex_unlock(&priv->mutex);
7011 return 0;
7012 }
7013
7014 if (iwl_is_rfkill(priv)) {
7015 IWL_DEBUG_MAC80211("leave - RF kill\n");
7016 mutex_unlock(&priv->mutex);
7017 return -EIO;
7018 }
7019
7020 iwl_set_rate(priv);
7021
7022 if (memcmp(&priv->active_rxon,
7023 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7024 iwl_commit_rxon(priv);
7025 else
7026 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7027
7028 IWL_DEBUG_MAC80211("leave\n");
7029
7030 mutex_unlock(&priv->mutex);
7031
7032 return 0;
7033 }
7034
7035 static void iwl_config_ap(struct iwl_priv *priv)
7036 {
7037 int rc = 0;
7038
7039 if (priv->status & STATUS_EXIT_PENDING)
7040 return;
7041
7042 /* The following should be done only at AP bring up */
7043 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7044
7045 /* RXON - unassoc (to set timing command) */
7046 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7047 iwl_commit_rxon(priv);
7048
7049 /* RXON Timing */
7050 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7051 iwl_setup_rxon_timing(priv);
7052 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7053 sizeof(priv->rxon_timing), &priv->rxon_timing);
7054 if (rc)
7055 IWL_WARNING("REPLY_RXON_TIMING failed - "
7056 "Attempting to continue.\n");
7057
7058 /* FIXME: what should be the assoc_id for AP? */
7059 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7060 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7061 priv->staging_rxon.flags |=
7062 RXON_FLG_SHORT_PREAMBLE_MSK;
7063 else
7064 priv->staging_rxon.flags &=
7065 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7066
7067 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7068 if (priv->assoc_capability &
7069 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7070 priv->staging_rxon.flags |=
7071 RXON_FLG_SHORT_SLOT_MSK;
7072 else
7073 priv->staging_rxon.flags &=
7074 ~RXON_FLG_SHORT_SLOT_MSK;
7075
7076 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7077 priv->staging_rxon.flags &=
7078 ~RXON_FLG_SHORT_SLOT_MSK;
7079 }
7080 /* restore RXON assoc */
7081 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7082 iwl_commit_rxon(priv);
7083 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7084 iwl_send_beacon_cmd(priv);
7085 } else
7086 iwl_send_beacon_cmd(priv);
7087
7088 /* FIXME - we need to add code here to detect a totally new
7089 * configuration, reset the AP, unassoc, rxon timing, assoc,
7090 * clear sta table, add BCAST sta... */
7091 }
7092
7093 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7094 struct ieee80211_if_conf *conf)
7095 {
7096 struct iwl_priv *priv = hw->priv;
7097 unsigned long flags;
7098 int rc;
7099
7100 if (conf == NULL)
7101 return -EIO;
7102
7103 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7104 (!conf->beacon || !conf->ssid_len)) {
7105 IWL_DEBUG_MAC80211
7106 ("Leaving in AP mode because HostAPD is not ready.\n");
7107 return 0;
7108 }
7109
7110 mutex_lock(&priv->mutex);
7111
7112 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7113 if (conf->bssid)
7114 IWL_DEBUG_MAC80211("bssid: " MAC_FMT "\n",
7115 MAC_ARG(conf->bssid));
7116
7117 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7118 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7119 IWL_DEBUG_MAC80211("leave - scanning\n");
7120 mutex_unlock(&priv->mutex);
7121 return 0;
7122 }
7123
7124 if (priv->interface_id != if_id) {
7125 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7126 mutex_unlock(&priv->mutex);
7127 return 0;
7128 }
7129
7130 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7131 if (!conf->bssid) {
7132 conf->bssid = priv->mac_addr;
7133 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7134 IWL_DEBUG_MAC80211("bssid was set to: " MAC_FMT "\n",
7135 MAC_ARG(conf->bssid));
7136 }
7137 if (priv->ibss_beacon)
7138 dev_kfree_skb(priv->ibss_beacon);
7139
7140 priv->ibss_beacon = conf->beacon;
7141 }
7142
7143 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7144 !is_multicast_ether_addr(conf->bssid)) {
7145 /* If there is currently a HW scan going on in the background
7146 * then we need to cancel it else the RXON below will fail. */
7147 if (iwl_scan_cancel_timeout(priv, 100)) {
7148 IWL_WARNING("Aborted scan still in progress "
7149 "after 100ms\n");
7150 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7151 mutex_unlock(&priv->mutex);
7152 return -EAGAIN;
7153 }
7154 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7155
7156 /* TODO: Audit driver for usage of these members and see
7157 * if mac80211 deprecates them (priv->bssid looks like it
7158 * shouldn't be there, but I haven't scanned the IBSS code
7159 * to verify) - jpk */
7160 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7161
7162 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7163 iwl_config_ap(priv);
7164 else {
7165 priv->staging_rxon.filter_flags |=
7166 RXON_FILTER_ASSOC_MSK;
7167 rc = iwl_commit_rxon(priv);
7168 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7169 iwl_rxon_add_station(
7170 priv, priv->active_rxon.bssid_addr, 1);
7171 }
7172
7173 } else {
7174 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7175 iwl_commit_rxon(priv);
7176 }
7177
7178 spin_lock_irqsave(&priv->lock, flags);
7179 if (!conf->ssid_len)
7180 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7181 else
7182 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7183
7184 priv->essid_len = conf->ssid_len;
7185 spin_unlock_irqrestore(&priv->lock, flags);
7186
7187 IWL_DEBUG_MAC80211("leave\n");
7188 mutex_unlock(&priv->mutex);
7189
7190 return 0;
7191 }
7192
7193 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7194 struct ieee80211_if_init_conf *conf)
7195 {
7196 struct iwl_priv *priv = hw->priv;
7197
7198 IWL_DEBUG_MAC80211("enter\n");
7199
7200 mutex_lock(&priv->mutex);
7201 if (priv->interface_id == conf->if_id) {
7202 priv->interface_id = 0;
7203 memset(priv->bssid, 0, ETH_ALEN);
7204 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7205 priv->essid_len = 0;
7206 }
7207 mutex_unlock(&priv->mutex);
7208
7209 IWL_DEBUG_MAC80211("leave\n");
7210
7211 }
7212
7213 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7214 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7215 {
7216 int rc = 0;
7217 unsigned long flags;
7218 struct iwl_priv *priv = hw->priv;
7219
7220 IWL_DEBUG_MAC80211("enter\n");
7221
7222 spin_lock_irqsave(&priv->lock, flags);
7223
7224 if (!iwl_is_ready_rf(priv)) {
7225 rc = -EIO;
7226 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7227 goto out_unlock;
7228 }
7229
7230 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7231 rc = -EIO;
7232 IWL_ERROR("ERROR: APs don't scan\n");
7233 goto out_unlock;
7234 }
7235
7236 /* if we just finished scan ask for delay */
7237 if (priv->last_scan_jiffies &&
7238 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7239 jiffies)) {
7240 rc = -EAGAIN;
7241 goto out_unlock;
7242 }
7243 if (len) {
7244 IWL_DEBUG_SCAN("direct scan for "
7245 "%s [%d]\n ",
7246 iwl_escape_essid(ssid, len), (int)len);
7247
7248 priv->one_direct_scan = 1;
7249 priv->direct_ssid_len = (u8)
7250 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7251 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7252 }
7253
7254 rc = iwl_scan_initiate(priv);
7255
7256 IWL_DEBUG_MAC80211("leave\n");
7257
7258 out_unlock:
7259 spin_unlock_irqrestore(&priv->lock, flags);
7260
7261 return rc;
7262 }
7263
7264 static int iwl_mac_set_key(struct ieee80211_hw *hw, set_key_cmd cmd,
7265 const u8 *local_addr, const u8 *addr,
7266 struct ieee80211_key_conf *key)
7267 {
7268 struct iwl_priv *priv = hw->priv;
7269 int rc = 0;
7270 u8 sta_id;
7271
7272 IWL_DEBUG_MAC80211("enter\n");
7273
7274 if (!iwl_param_hwcrypto) {
7275 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7276 return -EOPNOTSUPP;
7277 }
7278
7279 if (is_zero_ether_addr(addr))
7280 /* only support pairwise keys */
7281 return -EOPNOTSUPP;
7282
7283 sta_id = iwl_hw_find_station(priv, addr);
7284 if (sta_id == IWL_INVALID_STATION) {
7285 IWL_DEBUG_MAC80211("leave - " MAC_FMT " not in station map.\n",
7286 MAC_ARG(addr));
7287 return -EINVAL;
7288 }
7289
7290 mutex_lock(&priv->mutex);
7291
7292 switch (cmd) {
7293 case SET_KEY:
7294 rc = iwl_update_sta_key_info(priv, key, sta_id);
7295 if (!rc) {
7296 iwl_set_rxon_hwcrypto(priv, 1);
7297 iwl_commit_rxon(priv);
7298 key->hw_key_idx = sta_id;
7299 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7300 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7301 }
7302 break;
7303 case DISABLE_KEY:
7304 rc = iwl_clear_sta_key_info(priv, sta_id);
7305 if (!rc) {
7306 iwl_set_rxon_hwcrypto(priv, 0);
7307 iwl_commit_rxon(priv);
7308 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7309 }
7310 break;
7311 default:
7312 rc = -EINVAL;
7313 }
7314
7315 IWL_DEBUG_MAC80211("leave\n");
7316 mutex_unlock(&priv->mutex);
7317
7318 return rc;
7319 }
7320
7321 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7322 const struct ieee80211_tx_queue_params *params)
7323 {
7324 struct iwl_priv *priv = hw->priv;
7325 #ifdef CONFIG_IWLWIFI_QOS
7326 unsigned long flags;
7327 int q;
7328 #endif /* CONFIG_IWL_QOS */
7329
7330 IWL_DEBUG_MAC80211("enter\n");
7331
7332 if (!iwl_is_ready_rf(priv)) {
7333 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7334 return -EIO;
7335 }
7336
7337 if (queue >= AC_NUM) {
7338 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7339 return 0;
7340 }
7341
7342 #ifdef CONFIG_IWLWIFI_QOS
7343 if (!priv->qos_data.qos_enable) {
7344 priv->qos_data.qos_active = 0;
7345 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7346 return 0;
7347 }
7348 q = AC_NUM - 1 - queue;
7349
7350 spin_lock_irqsave(&priv->lock, flags);
7351
7352 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7353 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7354 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7355 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7356 cpu_to_le16((params->burst_time * 100));
7357
7358 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7359 priv->qos_data.qos_active = 1;
7360
7361 spin_unlock_irqrestore(&priv->lock, flags);
7362
7363 mutex_lock(&priv->mutex);
7364 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7365 iwl_activate_qos(priv, 1);
7366 else if (priv->assoc_id && iwl_is_associated(priv))
7367 iwl_activate_qos(priv, 0);
7368
7369 mutex_unlock(&priv->mutex);
7370
7371 #endif /*CONFIG_IWLWIFI_QOS */
7372
7373 IWL_DEBUG_MAC80211("leave\n");
7374 return 0;
7375 }
7376
7377 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7378 struct ieee80211_tx_queue_stats *stats)
7379 {
7380 struct iwl_priv *priv = hw->priv;
7381 int i, avail;
7382 struct iwl_tx_queue *txq;
7383 struct iwl_queue *q;
7384 unsigned long flags;
7385
7386 IWL_DEBUG_MAC80211("enter\n");
7387
7388 if (!iwl_is_ready_rf(priv)) {
7389 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7390 return -EIO;
7391 }
7392
7393 spin_lock_irqsave(&priv->lock, flags);
7394
7395 for (i = 0; i < AC_NUM; i++) {
7396 txq = &priv->txq[i];
7397 q = &txq->q;
7398 avail = iwl_queue_space(q);
7399
7400 stats->data[i].len = q->n_window - avail;
7401 stats->data[i].limit = q->n_window - q->high_mark;
7402 stats->data[i].count = q->n_window;
7403
7404 }
7405 spin_unlock_irqrestore(&priv->lock, flags);
7406
7407 IWL_DEBUG_MAC80211("leave\n");
7408
7409 return 0;
7410 }
7411
7412 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7413 struct ieee80211_low_level_stats *stats)
7414 {
7415 IWL_DEBUG_MAC80211("enter\n");
7416 IWL_DEBUG_MAC80211("leave\n");
7417
7418 return 0;
7419 }
7420
7421 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7422 {
7423 IWL_DEBUG_MAC80211("enter\n");
7424 IWL_DEBUG_MAC80211("leave\n");
7425
7426 return 0;
7427 }
7428
7429 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7430 {
7431 struct iwl_priv *priv = hw->priv;
7432 unsigned long flags;
7433
7434 mutex_lock(&priv->mutex);
7435 IWL_DEBUG_MAC80211("enter\n");
7436
7437 #ifdef CONFIG_IWLWIFI_QOS
7438 iwl_reset_qos(priv);
7439 #endif
7440 cancel_delayed_work(&priv->post_associate);
7441
7442 spin_lock_irqsave(&priv->lock, flags);
7443 priv->assoc_id = 0;
7444 priv->assoc_capability = 0;
7445 priv->call_post_assoc_from_beacon = 0;
7446
7447 /* new association get rid of ibss beacon skb */
7448 if (priv->ibss_beacon)
7449 dev_kfree_skb(priv->ibss_beacon);
7450
7451 priv->ibss_beacon = NULL;
7452
7453 priv->beacon_int = priv->hw->conf.beacon_int;
7454 priv->timestamp1 = 0;
7455 priv->timestamp0 = 0;
7456 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7457 priv->beacon_int = 0;
7458
7459 spin_unlock_irqrestore(&priv->lock, flags);
7460
7461 /* Per mac80211.h: This is only used in IBSS mode... */
7462 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7463 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7464 mutex_unlock(&priv->mutex);
7465 return;
7466 }
7467
7468 if (!iwl_is_ready_rf(priv)) {
7469 IWL_DEBUG_MAC80211("leave - not ready\n");
7470 mutex_unlock(&priv->mutex);
7471 return;
7472 }
7473
7474 priv->only_active_channel = 0;
7475
7476 iwl_set_rate(priv);
7477
7478 mutex_unlock(&priv->mutex);
7479
7480 IWL_DEBUG_MAC80211("leave\n");
7481
7482 }
7483
7484 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7485 struct ieee80211_tx_control *control)
7486 {
7487 struct iwl_priv *priv = hw->priv;
7488 unsigned long flags;
7489
7490 mutex_lock(&priv->mutex);
7491 IWL_DEBUG_MAC80211("enter\n");
7492
7493 if (!iwl_is_ready_rf(priv)) {
7494 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7495 mutex_unlock(&priv->mutex);
7496 return -EIO;
7497 }
7498
7499 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7500 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7501 mutex_unlock(&priv->mutex);
7502 return -EIO;
7503 }
7504
7505 spin_lock_irqsave(&priv->lock, flags);
7506
7507 if (priv->ibss_beacon)
7508 dev_kfree_skb(priv->ibss_beacon);
7509
7510 priv->ibss_beacon = skb;
7511
7512 priv->assoc_id = 0;
7513
7514 IWL_DEBUG_MAC80211("leave\n");
7515 spin_unlock_irqrestore(&priv->lock, flags);
7516
7517 #ifdef CONFIG_IWLWIFI_QOS
7518 iwl_reset_qos(priv);
7519 #endif
7520
7521 queue_work(priv->workqueue, &priv->post_associate.work);
7522
7523 mutex_unlock(&priv->mutex);
7524
7525 return 0;
7526 }
7527
7528 /*****************************************************************************
7529 *
7530 * sysfs attributes
7531 *
7532 *****************************************************************************/
7533
7534 #ifdef CONFIG_IWLWIFI_DEBUG
7535
7536 /*
7537 * The following adds a new attribute to the sysfs representation
7538 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7539 * used for controlling the debug level.
7540 *
7541 * See the level definitions in iwl for details.
7542 */
7543
7544 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7545 {
7546 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7547 }
7548 static ssize_t store_debug_level(struct device_driver *d,
7549 const char *buf, size_t count)
7550 {
7551 char *p = (char *)buf;
7552 u32 val;
7553
7554 val = simple_strtoul(p, &p, 0);
7555 if (p == buf)
7556 printk(KERN_INFO DRV_NAME
7557 ": %s is not in hex or decimal form.\n", buf);
7558 else
7559 iwl_debug_level = val;
7560
7561 return strnlen(buf, count);
7562 }
7563
7564 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7565 show_debug_level, store_debug_level);
7566
7567 #endif /* CONFIG_IWLWIFI_DEBUG */
7568
7569 static ssize_t show_rf_kill(struct device *d,
7570 struct device_attribute *attr, char *buf)
7571 {
7572 /*
7573 * 0 - RF kill not enabled
7574 * 1 - SW based RF kill active (sysfs)
7575 * 2 - HW based RF kill active
7576 * 3 - Both HW and SW based RF kill active
7577 */
7578 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7579 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7580 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7581
7582 return sprintf(buf, "%i\n", val);
7583 }
7584
7585 static ssize_t store_rf_kill(struct device *d,
7586 struct device_attribute *attr,
7587 const char *buf, size_t count)
7588 {
7589 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7590
7591 mutex_lock(&priv->mutex);
7592 iwl_radio_kill_sw(priv, buf[0] == '1');
7593 mutex_unlock(&priv->mutex);
7594
7595 return count;
7596 }
7597
7598 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7599
7600 static ssize_t show_temperature(struct device *d,
7601 struct device_attribute *attr, char *buf)
7602 {
7603 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7604
7605 if (!iwl_is_alive(priv))
7606 return -EAGAIN;
7607
7608 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7609 }
7610
7611 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7612
7613 static ssize_t show_rs_window(struct device *d,
7614 struct device_attribute *attr,
7615 char *buf)
7616 {
7617 struct iwl_priv *priv = d->driver_data;
7618 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7619 }
7620 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7621
7622 static ssize_t show_tx_power(struct device *d,
7623 struct device_attribute *attr, char *buf)
7624 {
7625 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7626 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7627 }
7628
7629 static ssize_t store_tx_power(struct device *d,
7630 struct device_attribute *attr,
7631 const char *buf, size_t count)
7632 {
7633 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7634 char *p = (char *)buf;
7635 u32 val;
7636
7637 val = simple_strtoul(p, &p, 10);
7638 if (p == buf)
7639 printk(KERN_INFO DRV_NAME
7640 ": %s is not in decimal form.\n", buf);
7641 else
7642 iwl_hw_reg_set_txpower(priv, val);
7643
7644 return count;
7645 }
7646
7647 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7648
7649 static ssize_t show_flags(struct device *d,
7650 struct device_attribute *attr, char *buf)
7651 {
7652 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7653
7654 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7655 }
7656
7657 static ssize_t store_flags(struct device *d,
7658 struct device_attribute *attr,
7659 const char *buf, size_t count)
7660 {
7661 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7662 u32 flags = simple_strtoul(buf, NULL, 0);
7663
7664 mutex_lock(&priv->mutex);
7665 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7666 /* Cancel any currently running scans... */
7667 if (iwl_scan_cancel_timeout(priv, 100))
7668 IWL_WARNING("Could not cancel scan.\n");
7669 else {
7670 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7671 flags);
7672 priv->staging_rxon.flags = cpu_to_le32(flags);
7673 iwl_commit_rxon(priv);
7674 }
7675 }
7676 mutex_unlock(&priv->mutex);
7677
7678 return count;
7679 }
7680
7681 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7682
7683 static ssize_t show_filter_flags(struct device *d,
7684 struct device_attribute *attr, char *buf)
7685 {
7686 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7687
7688 return sprintf(buf, "0x%04X\n",
7689 le32_to_cpu(priv->active_rxon.filter_flags));
7690 }
7691
7692 static ssize_t store_filter_flags(struct device *d,
7693 struct device_attribute *attr,
7694 const char *buf, size_t count)
7695 {
7696 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7697 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7698
7699 mutex_lock(&priv->mutex);
7700 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7701 /* Cancel any currently running scans... */
7702 if (iwl_scan_cancel_timeout(priv, 100))
7703 IWL_WARNING("Could not cancel scan.\n");
7704 else {
7705 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7706 "0x%04X\n", filter_flags);
7707 priv->staging_rxon.filter_flags =
7708 cpu_to_le32(filter_flags);
7709 iwl_commit_rxon(priv);
7710 }
7711 }
7712 mutex_unlock(&priv->mutex);
7713
7714 return count;
7715 }
7716
7717 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7718 store_filter_flags);
7719
7720 static ssize_t show_tune(struct device *d,
7721 struct device_attribute *attr, char *buf)
7722 {
7723 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7724
7725 return sprintf(buf, "0x%04X\n",
7726 (priv->phymode << 8) |
7727 le16_to_cpu(priv->active_rxon.channel));
7728 }
7729
7730 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7731
7732 static ssize_t store_tune(struct device *d,
7733 struct device_attribute *attr,
7734 const char *buf, size_t count)
7735 {
7736 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7737 char *p = (char *)buf;
7738 u16 tune = simple_strtoul(p, &p, 0);
7739 u8 phymode = (tune >> 8) & 0xff;
7740 u16 channel = tune & 0xff;
7741
7742 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7743
7744 mutex_lock(&priv->mutex);
7745 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7746 (priv->phymode != phymode)) {
7747 const struct iwl_channel_info *ch_info;
7748
7749 ch_info = iwl_get_channel_info(priv, phymode, channel);
7750 if (!ch_info) {
7751 IWL_WARNING("Requested invalid phymode/channel "
7752 "combination: %d %d\n", phymode, channel);
7753 mutex_unlock(&priv->mutex);
7754 return -EINVAL;
7755 }
7756
7757 /* Cancel any currently running scans... */
7758 if (iwl_scan_cancel_timeout(priv, 100))
7759 IWL_WARNING("Could not cancel scan.\n");
7760 else {
7761 IWL_DEBUG_INFO("Committing phymode and "
7762 "rxon.channel = %d %d\n",
7763 phymode, channel);
7764
7765 iwl_set_rxon_channel(priv, phymode, channel);
7766 iwl_set_flags_for_phymode(priv, phymode);
7767
7768 iwl_set_rate(priv);
7769 iwl_commit_rxon(priv);
7770 }
7771 }
7772 mutex_unlock(&priv->mutex);
7773
7774 return count;
7775 }
7776
7777 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7778
7779 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7780
7781 static ssize_t show_measurement(struct device *d,
7782 struct device_attribute *attr, char *buf)
7783 {
7784 struct iwl_priv *priv = dev_get_drvdata(d);
7785 struct iwl_spectrum_notification measure_report;
7786 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7787 u8 *data = (u8 *) & measure_report;
7788 unsigned long flags;
7789
7790 spin_lock_irqsave(&priv->lock, flags);
7791 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7792 spin_unlock_irqrestore(&priv->lock, flags);
7793 return 0;
7794 }
7795 memcpy(&measure_report, &priv->measure_report, size);
7796 priv->measurement_status = 0;
7797 spin_unlock_irqrestore(&priv->lock, flags);
7798
7799 while (size && (PAGE_SIZE - len)) {
7800 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7801 PAGE_SIZE - len, 1);
7802 len = strlen(buf);
7803 if (PAGE_SIZE - len)
7804 buf[len++] = '\n';
7805
7806 ofs += 16;
7807 size -= min(size, 16U);
7808 }
7809
7810 return len;
7811 }
7812
7813 static ssize_t store_measurement(struct device *d,
7814 struct device_attribute *attr,
7815 const char *buf, size_t count)
7816 {
7817 struct iwl_priv *priv = dev_get_drvdata(d);
7818 struct ieee80211_measurement_params params = {
7819 .channel = le16_to_cpu(priv->active_rxon.channel),
7820 .start_time = cpu_to_le64(priv->last_tsf),
7821 .duration = cpu_to_le16(1),
7822 };
7823 u8 type = IWL_MEASURE_BASIC;
7824 u8 buffer[32];
7825 u8 channel;
7826
7827 if (count) {
7828 char *p = buffer;
7829 strncpy(buffer, buf, min(sizeof(buffer), count));
7830 channel = simple_strtoul(p, NULL, 0);
7831 if (channel)
7832 params.channel = channel;
7833
7834 p = buffer;
7835 while (*p && *p != ' ')
7836 p++;
7837 if (*p)
7838 type = simple_strtoul(p + 1, NULL, 0);
7839 }
7840
7841 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7842 "channel %d (for '%s')\n", type, params.channel, buf);
7843 iwl_get_measurement(priv, &params, type);
7844
7845 return count;
7846 }
7847
7848 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7849 show_measurement, store_measurement);
7850 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7851
7852 static ssize_t show_rate(struct device *d,
7853 struct device_attribute *attr, char *buf)
7854 {
7855 struct iwl_priv *priv = dev_get_drvdata(d);
7856 unsigned long flags;
7857 int i;
7858
7859 spin_lock_irqsave(&priv->sta_lock, flags);
7860 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7861 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7862 else
7863 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7864 spin_unlock_irqrestore(&priv->sta_lock, flags);
7865
7866 i = iwl_rate_index_from_plcp(i);
7867 if (i == -1)
7868 return sprintf(buf, "0\n");
7869
7870 return sprintf(buf, "%d%s\n",
7871 (iwl_rates[i].ieee >> 1),
7872 (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7873 }
7874
7875 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7876
7877 static ssize_t store_retry_rate(struct device *d,
7878 struct device_attribute *attr,
7879 const char *buf, size_t count)
7880 {
7881 struct iwl_priv *priv = dev_get_drvdata(d);
7882
7883 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7884 if (priv->retry_rate <= 0)
7885 priv->retry_rate = 1;
7886
7887 return count;
7888 }
7889
7890 static ssize_t show_retry_rate(struct device *d,
7891 struct device_attribute *attr, char *buf)
7892 {
7893 struct iwl_priv *priv = dev_get_drvdata(d);
7894 return sprintf(buf, "%d", priv->retry_rate);
7895 }
7896
7897 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7898 store_retry_rate);
7899
7900 static ssize_t store_power_level(struct device *d,
7901 struct device_attribute *attr,
7902 const char *buf, size_t count)
7903 {
7904 struct iwl_priv *priv = dev_get_drvdata(d);
7905 int rc;
7906 int mode;
7907
7908 mode = simple_strtoul(buf, NULL, 0);
7909 mutex_lock(&priv->mutex);
7910
7911 if (!iwl_is_ready(priv)) {
7912 rc = -EAGAIN;
7913 goto out;
7914 }
7915
7916 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7917 mode = IWL_POWER_AC;
7918 else
7919 mode |= IWL_POWER_ENABLED;
7920
7921 if (mode != priv->power_mode) {
7922 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7923 if (rc) {
7924 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7925 goto out;
7926 }
7927 priv->power_mode = mode;
7928 }
7929
7930 rc = count;
7931
7932 out:
7933 mutex_unlock(&priv->mutex);
7934 return rc;
7935 }
7936
7937 #define MAX_WX_STRING 80
7938
7939 /* Values are in microsecond */
7940 static const s32 timeout_duration[] = {
7941 350000,
7942 250000,
7943 75000,
7944 37000,
7945 25000,
7946 };
7947 static const s32 period_duration[] = {
7948 400000,
7949 700000,
7950 1000000,
7951 1000000,
7952 1000000
7953 };
7954
7955 static ssize_t show_power_level(struct device *d,
7956 struct device_attribute *attr, char *buf)
7957 {
7958 struct iwl_priv *priv = dev_get_drvdata(d);
7959 int level = IWL_POWER_LEVEL(priv->power_mode);
7960 char *p = buf;
7961
7962 p += sprintf(p, "%d ", level);
7963 switch (level) {
7964 case IWL_POWER_MODE_CAM:
7965 case IWL_POWER_AC:
7966 p += sprintf(p, "(AC)");
7967 break;
7968 case IWL_POWER_BATTERY:
7969 p += sprintf(p, "(BATTERY)");
7970 break;
7971 default:
7972 p += sprintf(p,
7973 "(Timeout %dms, Period %dms)",
7974 timeout_duration[level - 1] / 1000,
7975 period_duration[level - 1] / 1000);
7976 }
7977
7978 if (!(priv->power_mode & IWL_POWER_ENABLED))
7979 p += sprintf(p, " OFF\n");
7980 else
7981 p += sprintf(p, " \n");
7982
7983 return (p - buf + 1);
7984
7985 }
7986
7987 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7988 store_power_level);
7989
7990 static ssize_t show_channels(struct device *d,
7991 struct device_attribute *attr, char *buf)
7992 {
7993 struct iwl_priv *priv = dev_get_drvdata(d);
7994 int len = 0, i;
7995 struct ieee80211_channel *channels = NULL;
7996 const struct ieee80211_hw_mode *hw_mode = NULL;
7997 int count = 0;
7998
7999 if (!iwl_is_ready(priv))
8000 return -EAGAIN;
8001
8002 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8003 if (!hw_mode)
8004 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8005 if (hw_mode) {
8006 channels = hw_mode->channels;
8007 count = hw_mode->num_channels;
8008 }
8009
8010 len +=
8011 sprintf(&buf[len],
8012 "Displaying %d channels in 2.4GHz band "
8013 "(802.11bg):\n", count);
8014
8015 for (i = 0; i < count; i++)
8016 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8017 channels[i].chan,
8018 channels[i].power_level,
8019 channels[i].
8020 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8021 " (IEEE 802.11h required)" : "",
8022 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8023 || (channels[i].
8024 flag &
8025 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8026 ", IBSS",
8027 channels[i].
8028 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8029 "active/passive" : "passive only");
8030
8031 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8032 if (hw_mode) {
8033 channels = hw_mode->channels;
8034 count = hw_mode->num_channels;
8035 } else {
8036 channels = NULL;
8037 count = 0;
8038 }
8039
8040 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8041 "(802.11a):\n", count);
8042
8043 for (i = 0; i < count; i++)
8044 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8045 channels[i].chan,
8046 channels[i].power_level,
8047 channels[i].
8048 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8049 " (IEEE 802.11h required)" : "",
8050 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8051 || (channels[i].
8052 flag &
8053 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8054 ", IBSS",
8055 channels[i].
8056 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8057 "active/passive" : "passive only");
8058
8059 return len;
8060 }
8061
8062 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8063
8064 static ssize_t show_statistics(struct device *d,
8065 struct device_attribute *attr, char *buf)
8066 {
8067 struct iwl_priv *priv = dev_get_drvdata(d);
8068 u32 size = sizeof(struct iwl_notif_statistics);
8069 u32 len = 0, ofs = 0;
8070 u8 *data = (u8 *) & priv->statistics;
8071 int rc = 0;
8072
8073 if (!iwl_is_alive(priv))
8074 return -EAGAIN;
8075
8076 mutex_lock(&priv->mutex);
8077 rc = iwl_send_statistics_request(priv);
8078 mutex_unlock(&priv->mutex);
8079
8080 if (rc) {
8081 len = sprintf(buf,
8082 "Error sending statistics request: 0x%08X\n", rc);
8083 return len;
8084 }
8085
8086 while (size && (PAGE_SIZE - len)) {
8087 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8088 PAGE_SIZE - len, 1);
8089 len = strlen(buf);
8090 if (PAGE_SIZE - len)
8091 buf[len++] = '\n';
8092
8093 ofs += 16;
8094 size -= min(size, 16U);
8095 }
8096
8097 return len;
8098 }
8099
8100 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8101
8102 static ssize_t show_antenna(struct device *d,
8103 struct device_attribute *attr, char *buf)
8104 {
8105 struct iwl_priv *priv = dev_get_drvdata(d);
8106
8107 if (!iwl_is_alive(priv))
8108 return -EAGAIN;
8109
8110 return sprintf(buf, "%d\n", priv->antenna);
8111 }
8112
8113 static ssize_t store_antenna(struct device *d,
8114 struct device_attribute *attr,
8115 const char *buf, size_t count)
8116 {
8117 int ant;
8118 struct iwl_priv *priv = dev_get_drvdata(d);
8119
8120 if (count == 0)
8121 return 0;
8122
8123 if (sscanf(buf, "%1i", &ant) != 1) {
8124 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8125 return count;
8126 }
8127
8128 if ((ant >= 0) && (ant <= 2)) {
8129 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8130 priv->antenna = (enum iwl_antenna)ant;
8131 } else
8132 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8133
8134
8135 return count;
8136 }
8137
8138 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8139
8140 static ssize_t show_status(struct device *d,
8141 struct device_attribute *attr, char *buf)
8142 {
8143 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8144 if (!iwl_is_alive(priv))
8145 return -EAGAIN;
8146 return sprintf(buf, "0x%08x\n", (int)priv->status);
8147 }
8148
8149 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8150
8151 static ssize_t dump_error_log(struct device *d,
8152 struct device_attribute *attr,
8153 const char *buf, size_t count)
8154 {
8155 char *p = (char *)buf;
8156
8157 if (p[0] == '1')
8158 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8159
8160 return strnlen(buf, count);
8161 }
8162
8163 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8164
8165 static ssize_t dump_event_log(struct device *d,
8166 struct device_attribute *attr,
8167 const char *buf, size_t count)
8168 {
8169 char *p = (char *)buf;
8170
8171 if (p[0] == '1')
8172 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8173
8174 return strnlen(buf, count);
8175 }
8176
8177 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8178
8179 /*****************************************************************************
8180 *
8181 * driver setup and teardown
8182 *
8183 *****************************************************************************/
8184
8185 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8186 {
8187 priv->workqueue = create_workqueue(DRV_NAME);
8188
8189 init_waitqueue_head(&priv->wait_command_queue);
8190
8191 INIT_WORK(&priv->up, iwl_bg_up);
8192 INIT_WORK(&priv->restart, iwl_bg_restart);
8193 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8194 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8195 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8196 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8197 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8198 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8199 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8200 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8201 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8202 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8203
8204 iwl_hw_setup_deferred_work(priv);
8205
8206 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8207 iwl_irq_tasklet, (unsigned long)priv);
8208 }
8209
8210 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8211 {
8212 iwl_hw_cancel_deferred_work(priv);
8213
8214 cancel_delayed_work(&priv->scan_check);
8215 cancel_delayed_work(&priv->alive_start);
8216 cancel_delayed_work(&priv->post_associate);
8217 cancel_work_sync(&priv->beacon_update);
8218 }
8219
8220 static struct attribute *iwl_sysfs_entries[] = {
8221 &dev_attr_antenna.attr,
8222 &dev_attr_channels.attr,
8223 &dev_attr_dump_errors.attr,
8224 &dev_attr_dump_events.attr,
8225 &dev_attr_flags.attr,
8226 &dev_attr_filter_flags.attr,
8227 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8228 &dev_attr_measurement.attr,
8229 #endif
8230 &dev_attr_power_level.attr,
8231 &dev_attr_rate.attr,
8232 &dev_attr_retry_rate.attr,
8233 &dev_attr_rf_kill.attr,
8234 &dev_attr_rs_window.attr,
8235 &dev_attr_statistics.attr,
8236 &dev_attr_status.attr,
8237 &dev_attr_temperature.attr,
8238 &dev_attr_tune.attr,
8239 &dev_attr_tx_power.attr,
8240
8241 NULL
8242 };
8243
8244 static struct attribute_group iwl_attribute_group = {
8245 .name = NULL, /* put in device directory */
8246 .attrs = iwl_sysfs_entries,
8247 };
8248
8249 static struct ieee80211_ops iwl_hw_ops = {
8250 .tx = iwl_mac_tx,
8251 .open = iwl_mac_open,
8252 .stop = iwl_mac_stop,
8253 .add_interface = iwl_mac_add_interface,
8254 .remove_interface = iwl_mac_remove_interface,
8255 .config = iwl_mac_config,
8256 .config_interface = iwl_mac_config_interface,
8257 .set_key = iwl_mac_set_key,
8258 .get_stats = iwl_mac_get_stats,
8259 .get_tx_stats = iwl_mac_get_tx_stats,
8260 .conf_tx = iwl_mac_conf_tx,
8261 .get_tsf = iwl_mac_get_tsf,
8262 .reset_tsf = iwl_mac_reset_tsf,
8263 .beacon_update = iwl_mac_beacon_update,
8264 .hw_scan = iwl_mac_hw_scan
8265 };
8266
8267 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8268 {
8269 int err = 0;
8270 u32 pci_id;
8271 struct iwl_priv *priv;
8272 struct ieee80211_hw *hw;
8273 int i;
8274
8275 if (iwl_param_disable_hw_scan) {
8276 IWL_DEBUG_INFO("Disabling hw_scan\n");
8277 iwl_hw_ops.hw_scan = NULL;
8278 }
8279
8280 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8281 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8282 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8283 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8284 err = -EINVAL;
8285 goto out;
8286 }
8287
8288 /* mac80211 allocates memory for this device instance, including
8289 * space for this driver's private structure */
8290 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8291 if (hw == NULL) {
8292 IWL_ERROR("Can not allocate network device\n");
8293 err = -ENOMEM;
8294 goto out;
8295 }
8296 SET_IEEE80211_DEV(hw, &pdev->dev);
8297
8298 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8299 priv = hw->priv;
8300 priv->hw = hw;
8301
8302 priv->pci_dev = pdev;
8303 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8304 #ifdef CONFIG_IWLWIFI_DEBUG
8305 iwl_debug_level = iwl_param_debug;
8306 atomic_set(&priv->restrict_refcnt, 0);
8307 #endif
8308 priv->retry_rate = 1;
8309
8310 priv->ibss_beacon = NULL;
8311
8312 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8313 * the range of signal quality values that we'll provide.
8314 * Negative values for level/noise indicate that we'll provide dBm.
8315 * For WE, at least, non-0 values here *enable* display of values
8316 * in app (iwconfig). */
8317 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8318 hw->max_noise = -20; /* noise level, negative indicates dBm */
8319 hw->max_signal = 100; /* link quality indication (%) */
8320
8321 /* Tell mac80211 our Tx characteristics */
8322 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8323
8324 hw->queues = 4;
8325
8326 spin_lock_init(&priv->lock);
8327 spin_lock_init(&priv->power_data.lock);
8328 spin_lock_init(&priv->sta_lock);
8329 spin_lock_init(&priv->hcmd_lock);
8330
8331 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8332 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8333
8334 INIT_LIST_HEAD(&priv->free_frames);
8335
8336 mutex_init(&priv->mutex);
8337 if (pci_enable_device(pdev)) {
8338 err = -ENODEV;
8339 goto out_ieee80211_free_hw;
8340 }
8341
8342 pci_set_master(pdev);
8343
8344 iwl_clear_stations_table(priv);
8345
8346 priv->data_retry_limit = -1;
8347 priv->ieee_channels = NULL;
8348 priv->ieee_rates = NULL;
8349 priv->phymode = -1;
8350
8351 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8352 if (!err)
8353 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8354 if (err) {
8355 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8356 goto out_pci_disable_device;
8357 }
8358
8359 pci_set_drvdata(pdev, priv);
8360 err = pci_request_regions(pdev, DRV_NAME);
8361 if (err)
8362 goto out_pci_disable_device;
8363 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8364 * PCI Tx retries from interfering with C3 CPU state */
8365 pci_write_config_byte(pdev, 0x41, 0x00);
8366 priv->hw_base = pci_iomap(pdev, 0, 0);
8367 if (!priv->hw_base) {
8368 err = -ENODEV;
8369 goto out_pci_release_regions;
8370 }
8371
8372 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8373 (unsigned long long) pci_resource_len(pdev, 0));
8374 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8375
8376 /* Initialize module parameter values here */
8377
8378 if (iwl_param_disable) {
8379 set_bit(STATUS_RF_KILL_SW, &priv->status);
8380 IWL_DEBUG_INFO("Radio disabled.\n");
8381 }
8382
8383 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8384
8385 pci_id =
8386 (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8387
8388 switch (pci_id) {
8389 case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
8390 case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
8391 case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
8392 case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
8393 priv->is_abg = 0;
8394 break;
8395
8396 /*
8397 * Rest are assumed ABG SKU -- if this is not the
8398 * case then the card will get the wrong 'Detected'
8399 * line in the kernel log however the code that
8400 * initializes the GEO table will detect no A-band
8401 * channels and remove the is_abg mask.
8402 */
8403 default:
8404 priv->is_abg = 1;
8405 break;
8406 }
8407
8408 printk(KERN_INFO DRV_NAME
8409 ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8410 priv->is_abg ? "A" : "");
8411
8412 /* Device-specific setup */
8413 if (iwl_hw_set_hw_setting(priv)) {
8414 IWL_ERROR("failed to set hw settings\n");
8415 mutex_unlock(&priv->mutex);
8416 goto out_iounmap;
8417 }
8418
8419 #ifdef CONFIG_IWLWIFI_QOS
8420 if (iwl_param_qos_enable)
8421 priv->qos_data.qos_enable = 1;
8422
8423 iwl_reset_qos(priv);
8424
8425 priv->qos_data.qos_active = 0;
8426 priv->qos_data.qos_cap.val = 0;
8427 #endif /* CONFIG_IWLWIFI_QOS */
8428
8429 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8430 iwl_setup_deferred_work(priv);
8431 iwl_setup_rx_handlers(priv);
8432
8433 priv->rates_mask = IWL_RATES_MASK;
8434 /* If power management is turned on, default to AC mode */
8435 priv->power_mode = IWL_POWER_AC;
8436 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8437
8438 pci_enable_msi(pdev);
8439
8440 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8441 if (err) {
8442 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8443 goto out_disable_msi;
8444 }
8445
8446 mutex_lock(&priv->mutex);
8447
8448 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8449 if (err) {
8450 IWL_ERROR("failed to create sysfs device attributes\n");
8451 mutex_unlock(&priv->mutex);
8452 goto out_release_irq;
8453 }
8454
8455 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8456 * ucode filename and max sizes are card-specific. */
8457 err = iwl_read_ucode(priv);
8458 if (err) {
8459 IWL_ERROR("Could not read microcode: %d\n", err);
8460 mutex_unlock(&priv->mutex);
8461 goto out_pci_alloc;
8462 }
8463
8464 mutex_unlock(&priv->mutex);
8465
8466 IWL_DEBUG_INFO("Queing UP work.\n");
8467
8468 queue_work(priv->workqueue, &priv->up);
8469
8470 return 0;
8471
8472 out_pci_alloc:
8473 iwl_dealloc_ucode_pci(priv);
8474
8475 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8476
8477 out_release_irq:
8478 free_irq(pdev->irq, priv);
8479
8480 out_disable_msi:
8481 pci_disable_msi(pdev);
8482 destroy_workqueue(priv->workqueue);
8483 priv->workqueue = NULL;
8484 iwl_unset_hw_setting(priv);
8485
8486 out_iounmap:
8487 pci_iounmap(pdev, priv->hw_base);
8488 out_pci_release_regions:
8489 pci_release_regions(pdev);
8490 out_pci_disable_device:
8491 pci_disable_device(pdev);
8492 pci_set_drvdata(pdev, NULL);
8493 out_ieee80211_free_hw:
8494 ieee80211_free_hw(priv->hw);
8495 out:
8496 return err;
8497 }
8498
8499 static void iwl_pci_remove(struct pci_dev *pdev)
8500 {
8501 struct iwl_priv *priv = pci_get_drvdata(pdev);
8502 struct list_head *p, *q;
8503 int i;
8504
8505 if (!priv)
8506 return;
8507
8508 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8509
8510 mutex_lock(&priv->mutex);
8511 set_bit(STATUS_EXIT_PENDING, &priv->status);
8512 __iwl_down(priv);
8513 mutex_unlock(&priv->mutex);
8514
8515 /* Free MAC hash list for ADHOC */
8516 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8517 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8518 list_del(p);
8519 kfree(list_entry(p, struct iwl_ibss_seq, list));
8520 }
8521 }
8522
8523 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8524
8525 iwl_dealloc_ucode_pci(priv);
8526
8527 if (priv->rxq.bd)
8528 iwl_rx_queue_free(priv, &priv->rxq);
8529 iwl_hw_txq_ctx_free(priv);
8530
8531 iwl_unset_hw_setting(priv);
8532 iwl_clear_stations_table(priv);
8533
8534 if (priv->mac80211_registered) {
8535 ieee80211_unregister_hw(priv->hw);
8536 iwl_rate_control_unregister(priv->hw);
8537 }
8538
8539 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8540 * priv->workqueue... so we can't take down the workqueue
8541 * until now... */
8542 destroy_workqueue(priv->workqueue);
8543 priv->workqueue = NULL;
8544
8545 free_irq(pdev->irq, priv);
8546 pci_disable_msi(pdev);
8547 pci_iounmap(pdev, priv->hw_base);
8548 pci_release_regions(pdev);
8549 pci_disable_device(pdev);
8550 pci_set_drvdata(pdev, NULL);
8551
8552 kfree(priv->channel_info);
8553
8554 kfree(priv->ieee_channels);
8555 kfree(priv->ieee_rates);
8556
8557 if (priv->ibss_beacon)
8558 dev_kfree_skb(priv->ibss_beacon);
8559
8560 ieee80211_free_hw(priv->hw);
8561 }
8562
8563 #ifdef CONFIG_PM
8564
8565 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8566 {
8567 struct iwl_priv *priv = pci_get_drvdata(pdev);
8568
8569 mutex_lock(&priv->mutex);
8570
8571 set_bit(STATUS_IN_SUSPEND, &priv->status);
8572
8573 /* Take down the device; powers it off, etc. */
8574 __iwl_down(priv);
8575
8576 if (priv->mac80211_registered)
8577 ieee80211_stop_queues(priv->hw);
8578
8579 pci_save_state(pdev);
8580 pci_disable_device(pdev);
8581 pci_set_power_state(pdev, PCI_D3hot);
8582
8583 mutex_unlock(&priv->mutex);
8584
8585 return 0;
8586 }
8587
8588 static void iwl_resume(struct iwl_priv *priv)
8589 {
8590 unsigned long flags;
8591
8592 /* The following it a temporary work around due to the
8593 * suspend / resume not fully initializing the NIC correctly.
8594 * Without all of the following, resume will not attempt to take
8595 * down the NIC (it shouldn't really need to) and will just try
8596 * and bring the NIC back up. However that fails during the
8597 * ucode verification process. This then causes iwl_down to be
8598 * called *after* iwl_hw_nic_init() has succeeded -- which
8599 * then lets the next init sequence succeed. So, we've
8600 * replicated all of that NIC init code here... */
8601
8602 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8603
8604 iwl_hw_nic_init(priv);
8605
8606 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8607 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8608 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8609 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8610 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8611 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8612
8613 /* tell the device to stop sending interrupts */
8614 iwl_disable_interrupts(priv);
8615
8616 spin_lock_irqsave(&priv->lock, flags);
8617 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8618
8619 if (!iwl_grab_restricted_access(priv)) {
8620 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8621 APMG_CLK_VAL_DMA_CLK_RQT);
8622 iwl_release_restricted_access(priv);
8623 }
8624 spin_unlock_irqrestore(&priv->lock, flags);
8625
8626 udelay(5);
8627
8628 iwl_hw_nic_reset(priv);
8629
8630 /* Bring the device back up */
8631 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8632 queue_work(priv->workqueue, &priv->up);
8633 }
8634
8635 static int iwl_pci_resume(struct pci_dev *pdev)
8636 {
8637 struct iwl_priv *priv = pci_get_drvdata(pdev);
8638 int err;
8639
8640 printk(KERN_INFO "Coming out of suspend...\n");
8641
8642 mutex_lock(&priv->mutex);
8643
8644 pci_set_power_state(pdev, PCI_D0);
8645 err = pci_enable_device(pdev);
8646 pci_restore_state(pdev);
8647
8648 /*
8649 * Suspend/Resume resets the PCI configuration space, so we have to
8650 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8651 * from interfering with C3 CPU state. pci_restore_state won't help
8652 * here since it only restores the first 64 bytes pci config header.
8653 */
8654 pci_write_config_byte(pdev, 0x41, 0x00);
8655
8656 iwl_resume(priv);
8657 mutex_unlock(&priv->mutex);
8658
8659 return 0;
8660 }
8661
8662 #endif /* CONFIG_PM */
8663
8664 /*****************************************************************************
8665 *
8666 * driver and module entry point
8667 *
8668 *****************************************************************************/
8669
8670 static struct pci_driver iwl_driver = {
8671 .name = DRV_NAME,
8672 .id_table = iwl_hw_card_ids,
8673 .probe = iwl_pci_probe,
8674 .remove = __devexit_p(iwl_pci_remove),
8675 #ifdef CONFIG_PM
8676 .suspend = iwl_pci_suspend,
8677 .resume = iwl_pci_resume,
8678 #endif
8679 };
8680
8681 static int __init iwl_init(void)
8682 {
8683
8684 int ret;
8685 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8686 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8687 ret = pci_register_driver(&iwl_driver);
8688 if (ret) {
8689 IWL_ERROR("Unable to initialize PCI module\n");
8690 return ret;
8691 }
8692 #ifdef CONFIG_IWLWIFI_DEBUG
8693 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8694 if (ret) {
8695 IWL_ERROR("Unable to create driver sysfs file\n");
8696 pci_unregister_driver(&iwl_driver);
8697 return ret;
8698 }
8699 #endif
8700
8701 return ret;
8702 }
8703
8704 static void __exit iwl_exit(void)
8705 {
8706 #ifdef CONFIG_IWLWIFI_DEBUG
8707 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8708 #endif
8709 pci_unregister_driver(&iwl_driver);
8710 }
8711
8712 module_param_named(antenna, iwl_param_antenna, int, 0444);
8713 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8714 module_param_named(disable, iwl_param_disable, int, 0444);
8715 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8716 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8717 MODULE_PARM_DESC(hwcrypto,
8718 "using hardware crypto engine (default 0 [software])\n");
8719 module_param_named(debug, iwl_param_debug, int, 0444);
8720 MODULE_PARM_DESC(debug, "debug output mask");
8721 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8722 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8723
8724 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8725 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8726
8727 /* QoS */
8728 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8729 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8730
8731 module_exit(iwl_exit);
8732 module_init(iwl_init);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree