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[PATCH] iwlwifi: Fix typo in rate sacling algorithm
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
CommitLineData
b481de9c
ZY		 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
1156b2c6
ZY		 61#define IWL 3945
62
b481de9c
ZY		 63#include "iwlwifi.h"
64#include "iwl-3945.h"
65#include "iwl-helpers.h"
66
67#ifdef CONFIG_IWLWIFI_DEBUG
68u32 iwl_debug_level;
69#endif
70
71/******************************************************************************
72 *
73 * module boiler plate
74 *
75 ******************************************************************************/
76
77/* module parameters */
78int iwl_param_disable_hw_scan;
79int iwl_param_debug;
80int iwl_param_disable; /* def: enable radio */
81int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
82int iwl_param_hwcrypto; /* def: using software encryption */
83int iwl_param_qos_enable = 1;
84int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
85
86/*
87 * module name, copyright, version, etc.
88 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
89 */
90
91#define DRV_DESCRIPTION \
92"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
93
94#ifdef CONFIG_IWLWIFI_DEBUG
95#define VD "d"
96#else
97#define VD
98#endif
99
100#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
101#define VS "s"
102#else
103#define VS
104#endif
105
106#define IWLWIFI_VERSION "0.1.15k" VD VS
107#define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
108#define DRV_VERSION IWLWIFI_VERSION
109
110/* Change firmware file name, using "-" and incrementing number,
111 * *only* when uCode interface or architecture changes so that it
112 * is not compatible with earlier drivers.
113 * This number will also appear in << 8 position of 1st dword of uCode file */
114#define IWL3945_UCODE_API "-1"
115
116MODULE_DESCRIPTION(DRV_DESCRIPTION);
117MODULE_VERSION(DRV_VERSION);
118MODULE_AUTHOR(DRV_COPYRIGHT);
119MODULE_LICENSE("GPL");
120
121__le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
122{
123 u16 fc = le16_to_cpu(hdr->frame_control);
124 int hdr_len = ieee80211_get_hdrlen(fc);
125
126 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
127 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
128 return NULL;
129}
130
131static const struct ieee80211_hw_mode *iwl_get_hw_mode(
132 struct iwl_priv *priv, int mode)
133{
134 int i;
135
136 for (i = 0; i < 3; i++)
137 if (priv->modes[i].mode == mode)
138 return &priv->modes[i];
139
140 return NULL;
141}
142
143static int iwl_is_empty_essid(const char *essid, int essid_len)
144{
145 /* Single white space is for Linksys APs */
146 if (essid_len == 1 && essid[0] == ' ')
147 return 1;
148
149 /* Otherwise, if the entire essid is 0, we assume it is hidden */
150 while (essid_len) {
151 essid_len--;
152 if (essid[essid_len] != '\0')
153 return 0;
154 }
155
156 return 1;
157}
158
159static const char *iwl_escape_essid(const char *essid, u8 essid_len)
160{
161 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
162 const char *s = essid;
163 char *d = escaped;
164
165 if (iwl_is_empty_essid(essid, essid_len)) {
166 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
167 return escaped;
168 }
169
170 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
171 while (essid_len--) {
172 if (*s == '\0') {
173 *d++ = '\\';
174 *d++ = '0';
175 s++;
176 } else
177 *d++ = *s++;
178 }
179 *d = '\0';
180 return escaped;
181}
182
183static void iwl_print_hex_dump(int level, void *p, u32 len)
184{
185#ifdef CONFIG_IWLWIFI_DEBUG
186 if (!(iwl_debug_level & level))
187 return;
188
189 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
190 p, len, 1);
191#endif
192}
193
194/*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
195 * DMA services
196 *
197 * Theory of operation
198 *
199 * A queue is a circular buffers with 'Read' and 'Write' pointers.
200 * 2 empty entries always kept in the buffer to protect from overflow.
201 *
202 * For Tx queue, there are low mark and high mark limits. If, after queuing
203 * the packet for Tx, free space become < low mark, Tx queue stopped. When
204 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
205 * Tx queue resumed.
206 *
583fab37 207 * The IWL operates with six queues, one receive queue in the device's
b481de9c
ZY		 208 * sram, one transmit queue for sending commands to the device firmware,
209 * and four transmit queues for data.
210 ***************************************************/
211
212static int iwl_queue_space(const struct iwl_queue *q)
213{
214 int s = q->last_used - q->first_empty;
215
216 if (q->last_used > q->first_empty)
217 s -= q->n_bd;
218
219 if (s <= 0)
220 s += q->n_window;
221 /* keep some reserve to not confuse empty and full situations */
222 s -= 2;
223 if (s < 0)
224 s = 0;
225 return s;
226}
227
228/* XXX: n_bd must be power-of-two size */
229static inline int iwl_queue_inc_wrap(int index, int n_bd)
230{
231 return ++index & (n_bd - 1);
232}
233
234/* XXX: n_bd must be power-of-two size */
235static inline int iwl_queue_dec_wrap(int index, int n_bd)
236{
237 return --index & (n_bd - 1);
238}
239
240static inline int x2_queue_used(const struct iwl_queue *q, int i)
241{
242 return q->first_empty > q->last_used ?
243 (i >= q->last_used && i < q->first_empty) :
244 !(i < q->last_used && i >= q->first_empty);
245}
246
247static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
248{
249 if (is_huge)
250 return q->n_window;
251
252 return index & (q->n_window - 1);
253}
254
255static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
256 int count, int slots_num, u32 id)
257{
258 q->n_bd = count;
259 q->n_window = slots_num;
260 q->id = id;
261
262 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
263 * and iwl_queue_dec_wrap are broken. */
264 BUG_ON(!is_power_of_2(count));
265
266 /* slots_num must be power-of-two size, otherwise
267 * get_cmd_index is broken. */
268 BUG_ON(!is_power_of_2(slots_num));
269
270 q->low_mark = q->n_window / 4;
271 if (q->low_mark < 4)
272 q->low_mark = 4;
273
274 q->high_mark = q->n_window / 8;
275 if (q->high_mark < 2)
276 q->high_mark = 2;
277
278 q->first_empty = q->last_used = 0;
279
280 return 0;
281}
282
283static int iwl_tx_queue_alloc(struct iwl_priv *priv,
284 struct iwl_tx_queue *txq, u32 id)
285{
286 struct pci_dev *dev = priv->pci_dev;
287
288 if (id != IWL_CMD_QUEUE_NUM) {
289 txq->txb = kmalloc(sizeof(txq->txb[0]) *
290 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
291 if (!txq->txb) {
292 IWL_ERROR("kmalloc for auxilary BD "
293 "structures failed\n");
294 goto error;
295 }
296 } else
297 txq->txb = NULL;
298
299 txq->bd = pci_alloc_consistent(dev,
300 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
301 &txq->q.dma_addr);
302
303 if (!txq->bd) {
304 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
305 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
306 goto error;
307 }
308 txq->q.id = id;
309
310 return 0;
311
312 error:
313 if (txq->txb) {
314 kfree(txq->txb);
315 txq->txb = NULL;
316 }
317
318 return -ENOMEM;
319}
320
321int iwl_tx_queue_init(struct iwl_priv *priv,
322 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
323{
324 struct pci_dev *dev = priv->pci_dev;
325 int len;
326 int rc = 0;
327
328 /* alocate command space + one big command for scan since scan
329 * command is very huge the system will not have two scan at the
330 * same time */
331 len = sizeof(struct iwl_cmd) * slots_num;
332 if (txq_id == IWL_CMD_QUEUE_NUM)
333 len += IWL_MAX_SCAN_SIZE;
334 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
335 if (!txq->cmd)
336 return -ENOMEM;
337
338 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
339 if (rc) {
340 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
341
342 return -ENOMEM;
343 }
344 txq->need_update = 0;
345
346 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
347 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
348 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
349 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
350
351 iwl_hw_tx_queue_init(priv, txq);
352
353 return 0;
354}
355
356/**
357 * iwl_tx_queue_free - Deallocate DMA queue.
358 * @txq: Transmit queue to deallocate.
359 *
360 * Empty queue by removing and destroying all BD's.
361 * Free all buffers. txq itself is not freed.
362 *
363 */
364void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
365{
366 struct iwl_queue *q = &txq->q;
367 struct pci_dev *dev = priv->pci_dev;
368 int len;
369
370 if (q->n_bd == 0)
371 return;
372
373 /* first, empty all BD's */
374 for (; q->first_empty != q->last_used;
375 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
376 iwl_hw_txq_free_tfd(priv, txq);
377
378 len = sizeof(struct iwl_cmd) * q->n_window;
379 if (q->id == IWL_CMD_QUEUE_NUM)
380 len += IWL_MAX_SCAN_SIZE;
381
382 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
383
384 /* free buffers belonging to queue itself */
385 if (txq->q.n_bd)
386 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
387 txq->q.n_bd, txq->bd, txq->q.dma_addr);
388
389 if (txq->txb) {
390 kfree(txq->txb);
391 txq->txb = NULL;
392 }
393
394 /* 0 fill whole structure */
395 memset(txq, 0, sizeof(*txq));
396}
397
398const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
399
400/*************** STATION TABLE MANAGEMENT ****
401 *
402 * NOTE: This needs to be overhauled to better synchronize between
403 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
404 *
405 * mac80211 should also be examined to determine if sta_info is duplicating
406 * the functionality provided here
407 */
408
409/**************************************************************/
556f8db7 410#if 0 /* temparary disable till we add real remove station */
b481de9c
ZY		 411static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
412{
413 int index = IWL_INVALID_STATION;
414 int i;
415 unsigned long flags;
416
417 spin_lock_irqsave(&priv->sta_lock, flags);
418
419 if (is_ap)
420 index = IWL_AP_ID;
421 else if (is_broadcast_ether_addr(addr))
422 index = priv->hw_setting.bcast_sta_id;
423 else
424 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
425 if (priv->stations[i].used &&
426 !compare_ether_addr(priv->stations[i].sta.sta.addr,
427 addr)) {
428 index = i;
429 break;
430 }
431
432 if (unlikely(index == IWL_INVALID_STATION))
433 goto out;
434
435 if (priv->stations[index].used) {
436 priv->stations[index].used = 0;
437 priv->num_stations--;
438 }
439
440 BUG_ON(priv->num_stations < 0);
441
442out:
443 spin_unlock_irqrestore(&priv->sta_lock, flags);
444 return 0;
445}
556f8db7 446#endif
b481de9c
ZY		 447static void iwl_clear_stations_table(struct iwl_priv *priv)
448{
449 unsigned long flags;
450
451 spin_lock_irqsave(&priv->sta_lock, flags);
452
453 priv->num_stations = 0;
454 memset(priv->stations, 0, sizeof(priv->stations));
455
456 spin_unlock_irqrestore(&priv->sta_lock, flags);
457}
458
459
460u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
461{
462 int i;
463 int index = IWL_INVALID_STATION;
464 struct iwl_station_entry *station;
465 unsigned long flags_spin;
0795af57 466 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 467
468 spin_lock_irqsave(&priv->sta_lock, flags_spin);
469 if (is_ap)
470 index = IWL_AP_ID;
471 else if (is_broadcast_ether_addr(addr))
472 index = priv->hw_setting.bcast_sta_id;
473 else
474 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
475 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
476 addr)) {
477 index = i;
478 break;
479 }
480
481 if (!priv->stations[i].used &&
482 index == IWL_INVALID_STATION)
483 index = i;
484 }
485
486 /* These twh conditions has the same outcome but keep them separate
487 since they have different meaning */
488 if (unlikely(index == IWL_INVALID_STATION)) {
489 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
490 return index;
491 }
492
493 if (priv->stations[index].used &&
494 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
495 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
496 return index;
497 }
498
0795af57 499 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
b481de9c
ZY		 500 station = &priv->stations[index];
501 station->used = 1;
502 priv->num_stations++;
503
504 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
505 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
506 station->sta.mode = 0;
507 station->sta.sta.sta_id = index;
508 station->sta.station_flags = 0;
509
510 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
511 iwl_send_add_station(priv, &station->sta, flags);
512 return index;
513
514}
515
516/*************** DRIVER STATUS FUNCTIONS *****/
517
518static inline int iwl_is_ready(struct iwl_priv *priv)
519{
520 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
521 * set but EXIT_PENDING is not */
522 return test_bit(STATUS_READY, &priv->status) &&
523 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
524 !test_bit(STATUS_EXIT_PENDING, &priv->status);
525}
526
527static inline int iwl_is_alive(struct iwl_priv *priv)
528{
529 return test_bit(STATUS_ALIVE, &priv->status);
530}
531
532static inline int iwl_is_init(struct iwl_priv *priv)
533{
534 return test_bit(STATUS_INIT, &priv->status);
535}
536
537static inline int iwl_is_rfkill(struct iwl_priv *priv)
538{
539 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
540 test_bit(STATUS_RF_KILL_SW, &priv->status);
541}
542
543static inline int iwl_is_ready_rf(struct iwl_priv *priv)
544{
545
546 if (iwl_is_rfkill(priv))
547 return 0;
548
549 return iwl_is_ready(priv);
550}
551
552/*************** HOST COMMAND QUEUE FUNCTIONS *****/
553
554#define IWL_CMD(x) case x : return #x
555
556static const char *get_cmd_string(u8 cmd)
557{
558 switch (cmd) {
559 IWL_CMD(REPLY_ALIVE);
560 IWL_CMD(REPLY_ERROR);
561 IWL_CMD(REPLY_RXON);
562 IWL_CMD(REPLY_RXON_ASSOC);
563 IWL_CMD(REPLY_QOS_PARAM);
564 IWL_CMD(REPLY_RXON_TIMING);
565 IWL_CMD(REPLY_ADD_STA);
566 IWL_CMD(REPLY_REMOVE_STA);
567 IWL_CMD(REPLY_REMOVE_ALL_STA);
568 IWL_CMD(REPLY_3945_RX);
569 IWL_CMD(REPLY_TX);
570 IWL_CMD(REPLY_RATE_SCALE);
571 IWL_CMD(REPLY_LEDS_CMD);
572 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
573 IWL_CMD(RADAR_NOTIFICATION);
574 IWL_CMD(REPLY_QUIET_CMD);
575 IWL_CMD(REPLY_CHANNEL_SWITCH);
576 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
577 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
578 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
579 IWL_CMD(POWER_TABLE_CMD);
580 IWL_CMD(PM_SLEEP_NOTIFICATION);
581 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
582 IWL_CMD(REPLY_SCAN_CMD);
583 IWL_CMD(REPLY_SCAN_ABORT_CMD);
584 IWL_CMD(SCAN_START_NOTIFICATION);
585 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
586 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
587 IWL_CMD(BEACON_NOTIFICATION);
588 IWL_CMD(REPLY_TX_BEACON);
589 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
590 IWL_CMD(QUIET_NOTIFICATION);
591 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
592 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
593 IWL_CMD(REPLY_BT_CONFIG);
594 IWL_CMD(REPLY_STATISTICS_CMD);
595 IWL_CMD(STATISTICS_NOTIFICATION);
596 IWL_CMD(REPLY_CARD_STATE_CMD);
597 IWL_CMD(CARD_STATE_NOTIFICATION);
598 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
599 default:
600 return "UNKNOWN";
601
602 }
603}
604
605#define HOST_COMPLETE_TIMEOUT (HZ / 2)
606
607/**
608 * iwl_enqueue_hcmd - enqueue a uCode command
609 * @priv: device private data point
610 * @cmd: a point to the ucode command structure
611 *
612 * The function returns < 0 values to indicate the operation is
613 * failed. On success, it turns the index (> 0) of command in the
614 * command queue.
615 */
616static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
617{
618 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
619 struct iwl_queue *q = &txq->q;
620 struct iwl_tfd_frame *tfd;
621 u32 *control_flags;
622 struct iwl_cmd *out_cmd;
623 u32 idx;
624 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
625 dma_addr_t phys_addr;
626 int pad;
627 u16 count;
628 int ret;
629 unsigned long flags;
630
631 /* If any of the command structures end up being larger than
632 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
633 * we will need to increase the size of the TFD entries */
634 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
635 !(cmd->meta.flags & CMD_SIZE_HUGE));
636
637 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
638 IWL_ERROR("No space for Tx\n");
639 return -ENOSPC;
640 }
641
642 spin_lock_irqsave(&priv->hcmd_lock, flags);
643
644 tfd = &txq->bd[q->first_empty];
645 memset(tfd, 0, sizeof(*tfd));
646
647 control_flags = (u32 *) tfd;
648
649 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
650 out_cmd = &txq->cmd[idx];
651
652 out_cmd->hdr.cmd = cmd->id;
653 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
654 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
655
656 /* At this point, the out_cmd now has all of the incoming cmd
657 * information */
658
659 out_cmd->hdr.flags = 0;
660 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
661 INDEX_TO_SEQ(q->first_empty));
662 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
663 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
664
665 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
666 offsetof(struct iwl_cmd, hdr);
667 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
668
669 pad = U32_PAD(cmd->len);
670 count = TFD_CTL_COUNT_GET(*control_flags);
671 *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
672
673 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
674 "%d bytes at %d[%d]:%d\n",
675 get_cmd_string(out_cmd->hdr.cmd),
676 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
677 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
678
679 txq->need_update = 1;
680 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
681 ret = iwl_tx_queue_update_write_ptr(priv, txq);
682
683 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
684 return ret ? ret : idx;
685}
686
687int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
688{
689 int ret;
690
691 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
692
693 /* An asynchronous command can not expect an SKB to be set. */
694 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
695
696 /* An asynchronous command MUST have a callback. */
697 BUG_ON(!cmd->meta.u.callback);
698
699 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
700 return -EBUSY;
701
702 ret = iwl_enqueue_hcmd(priv, cmd);
703 if (ret < 0) {
704 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
705 get_cmd_string(cmd->id), ret);
706 return ret;
707 }
708 return 0;
709}
710
711int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
712{
713 int cmd_idx;
714 int ret;
715 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
716
717 BUG_ON(cmd->meta.flags & CMD_ASYNC);
718
719 /* A synchronous command can not have a callback set. */
720 BUG_ON(cmd->meta.u.callback != NULL);
721
722 if (atomic_xchg(&entry, 1)) {
723 IWL_ERROR("Error sending %s: Already sending a host command\n",
724 get_cmd_string(cmd->id));
725 return -EBUSY;
726 }
727
728 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
729
730 if (cmd->meta.flags & CMD_WANT_SKB)
731 cmd->meta.source = &cmd->meta;
732
733 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
734 if (cmd_idx < 0) {
735 ret = cmd_idx;
736 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
737 get_cmd_string(cmd->id), ret);
738 goto out;
739 }
740
741 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
742 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
743 HOST_COMPLETE_TIMEOUT);
744 if (!ret) {
745 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
746 IWL_ERROR("Error sending %s: time out after %dms.\n",
747 get_cmd_string(cmd->id),
748 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
749
750 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
751 ret = -ETIMEDOUT;
752 goto cancel;
753 }
754 }
755
756 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
757 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
758 get_cmd_string(cmd->id));
759 ret = -ECANCELED;
760 goto fail;
761 }
762 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
763 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
764 get_cmd_string(cmd->id));
765 ret = -EIO;
766 goto fail;
767 }
768 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
769 IWL_ERROR("Error: Response NULL in '%s'\n",
770 get_cmd_string(cmd->id));
771 ret = -EIO;
772 goto out;
773 }
774
775 ret = 0;
776 goto out;
777
778cancel:
779 if (cmd->meta.flags & CMD_WANT_SKB) {
780 struct iwl_cmd *qcmd;
781
782 /* Cancel the CMD_WANT_SKB flag for the cmd in the
783 * TX cmd queue. Otherwise in case the cmd comes
784 * in later, it will possibly set an invalid
785 * address (cmd->meta.source). */
786 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
787 qcmd->meta.flags &= ~CMD_WANT_SKB;
788 }
789fail:
790 if (cmd->meta.u.skb) {
791 dev_kfree_skb_any(cmd->meta.u.skb);
792 cmd->meta.u.skb = NULL;
793 }
794out:
795 atomic_set(&entry, 0);
796 return ret;
797}
798
799int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
800{
801 /* A command can not be asynchronous AND expect an SKB to be set. */
802 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
803 (cmd->meta.flags & CMD_WANT_SKB));
804
805 if (cmd->meta.flags & CMD_ASYNC)
806 return iwl_send_cmd_async(priv, cmd);
807
808 return iwl_send_cmd_sync(priv, cmd);
809}
810
811int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
812{
813 struct iwl_host_cmd cmd = {
814 .id = id,
815 .len = len,
816 .data = data,
817 };
818
819 return iwl_send_cmd_sync(priv, &cmd);
820}
821
822static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
823{
824 struct iwl_host_cmd cmd = {
825 .id = id,
826 .len = sizeof(val),
827 .data = &val,
828 };
829
830 return iwl_send_cmd_sync(priv, &cmd);
831}
832
833int iwl_send_statistics_request(struct iwl_priv *priv)
834{
835 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
836}
837
b481de9c
ZY		 838/**
839 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
840 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
841 * @channel: Any channel valid for the requested phymode
842
843 * In addition to setting the staging RXON, priv->phymode is also set.
844 *
845 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
846 * in the staging RXON flag structure based on the phymode
847 */
848static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
849{
850 if (!iwl_get_channel_info(priv, phymode, channel)) {
851 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
852 channel, phymode);
853 return -EINVAL;
854 }
855
856 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
857 (priv->phymode == phymode))
858 return 0;
859
860 priv->staging_rxon.channel = cpu_to_le16(channel);
861 if (phymode == MODE_IEEE80211A)
862 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
863 else
864 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
865
866 priv->phymode = phymode;
867
868 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
869
870 return 0;
871}
872
873/**
874 * iwl_check_rxon_cmd - validate RXON structure is valid
875 *
876 * NOTE: This is really only useful during development and can eventually
877 * be #ifdef'd out once the driver is stable and folks aren't actively
878 * making changes
879 */
880static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
881{
882 int error = 0;
883 int counter = 1;
884
885 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
886 error |= le32_to_cpu(rxon->flags &
887 (RXON_FLG_TGJ_NARROW_BAND_MSK |
888 RXON_FLG_RADAR_DETECT_MSK));
889 if (error)
890 IWL_WARNING("check 24G fields %d | %d\n",
891 counter++, error);
892 } else {
893 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
894 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
895 if (error)
896 IWL_WARNING("check 52 fields %d | %d\n",
897 counter++, error);
898 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
899 if (error)
900 IWL_WARNING("check 52 CCK %d | %d\n",
901 counter++, error);
902 }
903 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
904 if (error)
905 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
906
907 /* make sure basic rates 6Mbps and 1Mbps are supported */
908 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
909 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
910 if (error)
911 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
912
913 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
914 if (error)
915 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
916
917 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
918 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
919 if (error)
920 IWL_WARNING("check CCK and short slot %d | %d\n",
921 counter++, error);
922
923 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
924 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
925 if (error)
926 IWL_WARNING("check CCK & auto detect %d | %d\n",
927 counter++, error);
928
929 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
930 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
931 if (error)
932 IWL_WARNING("check TGG and auto detect %d | %d\n",
933 counter++, error);
934
935 if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
936 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
937 RXON_FLG_ANT_A_MSK)) == 0);
938 if (error)
939 IWL_WARNING("check antenna %d %d\n", counter++, error);
940
941 if (error)
942 IWL_WARNING("Tuning to channel %d\n",
943 le16_to_cpu(rxon->channel));
944
945 if (error) {
946 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
947 return -1;
948 }
949 return 0;
950}
951
952/**
953 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
954 * @priv: staging_rxon is comapred to active_rxon
955 *
956 * If the RXON structure is changing sufficient to require a new
957 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
958 * to indicate a new tune is required.
959 */
960static int iwl_full_rxon_required(struct iwl_priv *priv)
961{
962
963 /* These items are only settable from the full RXON command */
964 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
965 compare_ether_addr(priv->staging_rxon.bssid_addr,
966 priv->active_rxon.bssid_addr) ||
967 compare_ether_addr(priv->staging_rxon.node_addr,
968 priv->active_rxon.node_addr) ||
969 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
970 priv->active_rxon.wlap_bssid_addr) ||
971 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
972 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
973 (priv->staging_rxon.air_propagation !=
974 priv->active_rxon.air_propagation) ||
975 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
976 return 1;
977
978 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
979 * be updated with the RXON_ASSOC command -- however only some
980 * flag transitions are allowed using RXON_ASSOC */
981
982 /* Check if we are not switching bands */
983 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
984 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
985 return 1;
986
987 /* Check if we are switching association toggle */
988 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
989 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
990 return 1;
991
992 return 0;
993}
994
995static int iwl_send_rxon_assoc(struct iwl_priv *priv)
996{
997 int rc = 0;
998 struct iwl_rx_packet *res = NULL;
999 struct iwl_rxon_assoc_cmd rxon_assoc;
1000 struct iwl_host_cmd cmd = {
1001 .id = REPLY_RXON_ASSOC,
1002 .len = sizeof(rxon_assoc),
1003 .meta.flags = CMD_WANT_SKB,
1004 .data = &rxon_assoc,
1005 };
1006 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1007 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1008
1009 if ((rxon1->flags == rxon2->flags) &&
1010 (rxon1->filter_flags == rxon2->filter_flags) &&
1011 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1012 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1013 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1014 return 0;
1015 }
1016
1017 rxon_assoc.flags = priv->staging_rxon.flags;
1018 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1019 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1020 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1021 rxon_assoc.reserved = 0;
1022
1023 rc = iwl_send_cmd_sync(priv, &cmd);
1024 if (rc)
1025 return rc;
1026
1027 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1028 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1029 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1030 rc = -EIO;
1031 }
1032
1033 priv->alloc_rxb_skb--;
1034 dev_kfree_skb_any(cmd.meta.u.skb);
1035
1036 return rc;
1037}
1038
1039/**
1040 * iwl_commit_rxon - commit staging_rxon to hardware
1041 *
1042 * The RXON command in staging_rxon is commited to the hardware and
1043 * the active_rxon structure is updated with the new data. This
1044 * function correctly transitions out of the RXON_ASSOC_MSK state if
1045 * a HW tune is required based on the RXON structure changes.
1046 */
1047static int iwl_commit_rxon(struct iwl_priv *priv)
1048{
1049 /* cast away the const for active_rxon in this function */
1050 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1051 int rc = 0;
0795af57 1052 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 1053
1054 if (!iwl_is_alive(priv))
1055 return -1;
1056
1057 /* always get timestamp with Rx frame */
1058 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1059
1060 /* select antenna */
1061 priv->staging_rxon.flags &=
1062 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1063 priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1064
1065 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1066 if (rc) {
1067 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1068 return -EINVAL;
1069 }
1070
1071 /* If we don't need to send a full RXON, we can use
1072 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1073 * and other flags for the current radio configuration. */
1074 if (!iwl_full_rxon_required(priv)) {
1075 rc = iwl_send_rxon_assoc(priv);
1076 if (rc) {
1077 IWL_ERROR("Error setting RXON_ASSOC "
1078 "configuration (%d).\n", rc);
1079 return rc;
1080 }
1081
1082 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1083
1084 return 0;
1085 }
1086
1087 /* If we are currently associated and the new config requires
1088 * an RXON_ASSOC and the new config wants the associated mask enabled,
1089 * we must clear the associated from the active configuration
1090 * before we apply the new config */
1091 if (iwl_is_associated(priv) &&
1092 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1093 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1094 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1095
1096 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1097 sizeof(struct iwl_rxon_cmd),
1098 &priv->active_rxon);
1099
1100 /* If the mask clearing failed then we set
1101 * active_rxon back to what it was previously */
1102 if (rc) {
1103 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1104 IWL_ERROR("Error clearing ASSOC_MSK on current "
1105 "configuration (%d).\n", rc);
1106 return rc;
1107 }
b481de9c
ZY		 1108 }
1109
1110 IWL_DEBUG_INFO("Sending RXON\n"
1111 "* with%s RXON_FILTER_ASSOC_MSK\n"
1112 "* channel = %d\n"
0795af57 1113 "* bssid = %s\n",
b481de9c
ZY		 1114 ((priv->staging_rxon.filter_flags &
1115 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1116 le16_to_cpu(priv->staging_rxon.channel),
0795af57 1117 print_mac(mac, priv->staging_rxon.bssid_addr));
b481de9c
ZY		 1118
1119 /* Apply the new configuration */
1120 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1121 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1122 if (rc) {
1123 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1124 return rc;
1125 }
1126
1127 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1128
556f8db7
ZY		 1129 iwl_clear_stations_table(priv);
1130
b481de9c
ZY		 1131 /* If we issue a new RXON command which required a tune then we must
1132 * send a new TXPOWER command or we won't be able to Tx any frames */
1133 rc = iwl_hw_reg_send_txpower(priv);
1134 if (rc) {
1135 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1136 return rc;
1137 }
1138
1139 /* Add the broadcast address so we can send broadcast frames */
556f8db7 1140 if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
b481de9c
ZY		 1141 IWL_INVALID_STATION) {
1142 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1143 return -EIO;
1144 }
1145
1146 /* If we have set the ASSOC_MSK and we are in BSS mode then
1147 * add the IWL_AP_ID to the station rate table */
1148 if (iwl_is_associated(priv) &&
1149 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
556f8db7 1150 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
b481de9c
ZY		 1151 == IWL_INVALID_STATION) {
1152 IWL_ERROR("Error adding AP address for transmit.\n");
1153 return -EIO;
1154 }
1155
1156 /* Init the hardware's rate fallback order based on the
1157 * phymode */
1158 rc = iwl3945_init_hw_rate_table(priv);
1159 if (rc) {
1160 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1161 return -EIO;
1162 }
1163
1164 return 0;
1165}
1166
1167static int iwl_send_bt_config(struct iwl_priv *priv)
1168{
1169 struct iwl_bt_cmd bt_cmd = {
1170 .flags = 3,
1171 .lead_time = 0xAA,
1172 .max_kill = 1,
1173 .kill_ack_mask = 0,
1174 .kill_cts_mask = 0,
1175 };
1176
1177 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1178 sizeof(struct iwl_bt_cmd), &bt_cmd);
1179}
1180
1181static int iwl_send_scan_abort(struct iwl_priv *priv)
1182{
1183 int rc = 0;
1184 struct iwl_rx_packet *res;
1185 struct iwl_host_cmd cmd = {
1186 .id = REPLY_SCAN_ABORT_CMD,
1187 .meta.flags = CMD_WANT_SKB,
1188 };
1189
1190 /* If there isn't a scan actively going on in the hardware
1191 * then we are in between scan bands and not actually
1192 * actively scanning, so don't send the abort command */
1193 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1194 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1195 return 0;
1196 }
1197
1198 rc = iwl_send_cmd_sync(priv, &cmd);
1199 if (rc) {
1200 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1201 return rc;
1202 }
1203
1204 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1205 if (res->u.status != CAN_ABORT_STATUS) {
1206 /* The scan abort will return 1 for success or
1207 * 2 for "failure". A failure condition can be
1208 * due to simply not being in an active scan which
1209 * can occur if we send the scan abort before we
1210 * the microcode has notified us that a scan is
1211 * completed. */
1212 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1213 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1214 clear_bit(STATUS_SCAN_HW, &priv->status);
1215 }
1216
1217 dev_kfree_skb_any(cmd.meta.u.skb);
1218
1219 return rc;
1220}
1221
1222static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1223 struct iwl_cmd *cmd,
1224 struct sk_buff *skb)
1225{
1226 return 1;
1227}
1228
1229/*
1230 * CARD_STATE_CMD
1231 *
1232 * Use: Sets the internal card state to enable, disable, or halt
1233 *
1234 * When in the 'enable' state the card operates as normal.
1235 * When in the 'disable' state, the card enters into a low power mode.
1236 * When in the 'halt' state, the card is shut down and must be fully
1237 * restarted to come back on.
1238 */
1239static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1240{
1241 struct iwl_host_cmd cmd = {
1242 .id = REPLY_CARD_STATE_CMD,
1243 .len = sizeof(u32),
1244 .data = &flags,
1245 .meta.flags = meta_flag,
1246 };
1247
1248 if (meta_flag & CMD_ASYNC)
1249 cmd.meta.u.callback = iwl_card_state_sync_callback;
1250
1251 return iwl_send_cmd(priv, &cmd);
1252}
1253
1254static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1255 struct iwl_cmd *cmd, struct sk_buff *skb)
1256{
1257 struct iwl_rx_packet *res = NULL;
1258
1259 if (!skb) {
1260 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1261 return 1;
1262 }
1263
1264 res = (struct iwl_rx_packet *)skb->data;
1265 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1266 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1267 res->hdr.flags);
1268 return 1;
1269 }
1270
1271 switch (res->u.add_sta.status) {
1272 case ADD_STA_SUCCESS_MSK:
1273 break;
1274 default:
1275 break;
1276 }
1277
1278 /* We didn't cache the SKB; let the caller free it */
1279 return 1;
1280}
1281
1282int iwl_send_add_station(struct iwl_priv *priv,
1283 struct iwl_addsta_cmd *sta, u8 flags)
1284{
1285 struct iwl_rx_packet *res = NULL;
1286 int rc = 0;
1287 struct iwl_host_cmd cmd = {
1288 .id = REPLY_ADD_STA,
1289 .len = sizeof(struct iwl_addsta_cmd),
1290 .meta.flags = flags,
1291 .data = sta,
1292 };
1293
1294 if (flags & CMD_ASYNC)
1295 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1296 else
1297 cmd.meta.flags |= CMD_WANT_SKB;
1298
1299 rc = iwl_send_cmd(priv, &cmd);
1300
1301 if (rc || (flags & CMD_ASYNC))
1302 return rc;
1303
1304 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1305 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1306 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1307 res->hdr.flags);
1308 rc = -EIO;
1309 }
1310
1311 if (rc == 0) {
1312 switch (res->u.add_sta.status) {
1313 case ADD_STA_SUCCESS_MSK:
1314 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1315 break;
1316 default:
1317 rc = -EIO;
1318 IWL_WARNING("REPLY_ADD_STA failed\n");
1319 break;
1320 }
1321 }
1322
1323 priv->alloc_rxb_skb--;
1324 dev_kfree_skb_any(cmd.meta.u.skb);
1325
1326 return rc;
1327}
1328
1329static int iwl_update_sta_key_info(struct iwl_priv *priv,
1330 struct ieee80211_key_conf *keyconf,
1331 u8 sta_id)
1332{
1333 unsigned long flags;
1334 __le16 key_flags = 0;
1335
1336 switch (keyconf->alg) {
1337 case ALG_CCMP:
1338 key_flags |= STA_KEY_FLG_CCMP;
1339 key_flags |= cpu_to_le16(
1340 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1341 key_flags &= ~STA_KEY_FLG_INVALID;
1342 break;
1343 case ALG_TKIP:
1344 case ALG_WEP:
1345 return -EINVAL;
1346 default:
1347 return -EINVAL;
1348 }
1349 spin_lock_irqsave(&priv->sta_lock, flags);
1350 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1351 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1352 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1353 keyconf->keylen);
1354
1355 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1356 keyconf->keylen);
1357 priv->stations[sta_id].sta.key.key_flags = key_flags;
1358 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1359 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1360
1361 spin_unlock_irqrestore(&priv->sta_lock, flags);
1362
1363 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1364 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1365 return 0;
1366}
1367
1368static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1369{
1370 unsigned long flags;
1371
1372 spin_lock_irqsave(&priv->sta_lock, flags);
1373 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1374 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1375 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1376 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1377 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1378 spin_unlock_irqrestore(&priv->sta_lock, flags);
1379
1380 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1381 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1382 return 0;
1383}
1384
1385static void iwl_clear_free_frames(struct iwl_priv *priv)
1386{
1387 struct list_head *element;
1388
1389 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1390 priv->frames_count);
1391
1392 while (!list_empty(&priv->free_frames)) {
1393 element = priv->free_frames.next;
1394 list_del(element);
1395 kfree(list_entry(element, struct iwl_frame, list));
1396 priv->frames_count--;
1397 }
1398
1399 if (priv->frames_count) {
1400 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1401 priv->frames_count);
1402 priv->frames_count = 0;
1403 }
1404}
1405
1406static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1407{
1408 struct iwl_frame *frame;
1409 struct list_head *element;
1410 if (list_empty(&priv->free_frames)) {
1411 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1412 if (!frame) {
1413 IWL_ERROR("Could not allocate frame!\n");
1414 return NULL;
1415 }
1416
1417 priv->frames_count++;
1418 return frame;
1419 }
1420
1421 element = priv->free_frames.next;
1422 list_del(element);
1423 return list_entry(element, struct iwl_frame, list);
1424}
1425
1426static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1427{
1428 memset(frame, 0, sizeof(*frame));
1429 list_add(&frame->list, &priv->free_frames);
1430}
1431
1432unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1433 struct ieee80211_hdr *hdr,
1434 const u8 *dest, int left)
1435{
1436
1437 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1438 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1439 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1440 return 0;
1441
1442 if (priv->ibss_beacon->len > left)
1443 return 0;
1444
1445 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1446
1447 return priv->ibss_beacon->len;
1448}
1449
1450static int iwl_rate_index_from_plcp(int plcp)
1451{
1452 int i = 0;
1453
1454 for (i = 0; i < IWL_RATE_COUNT; i++)
1455 if (iwl_rates[i].plcp == plcp)
1456 return i;
1457 return -1;
1458}
1459
1460static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1461{
1462 u8 i;
1463
1464 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1465 i = iwl_rates[i].next_ieee) {
1466 if (rate_mask & (1 << i))
1467 return iwl_rates[i].plcp;
1468 }
1469
1470 return IWL_RATE_INVALID;
1471}
1472
1473static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1474{
1475 struct iwl_frame *frame;
1476 unsigned int frame_size;
1477 int rc;
1478 u8 rate;
1479
1480 frame = iwl_get_free_frame(priv);
1481
1482 if (!frame) {
1483 IWL_ERROR("Could not obtain free frame buffer for beacon "
1484 "command.\n");
1485 return -ENOMEM;
1486 }
1487
1488 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1489 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1490 0xFF0);
1491 if (rate == IWL_INVALID_RATE)
1492 rate = IWL_RATE_6M_PLCP;
1493 } else {
1494 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1495 if (rate == IWL_INVALID_RATE)
1496 rate = IWL_RATE_1M_PLCP;
1497 }
1498
1499 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1500
1501 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1502 &frame->u.cmd[0]);
1503
1504 iwl_free_frame(priv, frame);
1505
1506 return rc;
1507}
1508
1509/******************************************************************************
1510 *
1511 * EEPROM related functions
1512 *
1513 ******************************************************************************/
1514
1515static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1516{
1517 memcpy(mac, priv->eeprom.mac_address, 6);
1518}
1519
1520/**
1521 * iwl_eeprom_init - read EEPROM contents
1522 *
1523 * Load the EEPROM from adapter into priv->eeprom
1524 *
1525 * NOTE: This routine uses the non-debug IO access functions.
1526 */
1527int iwl_eeprom_init(struct iwl_priv *priv)
1528{
1529 u16 *e = (u16 *)&priv->eeprom;
1530 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1531 u32 r;
1532 int sz = sizeof(priv->eeprom);
1533 int rc;
1534 int i;
1535 u16 addr;
1536
1537 /* The EEPROM structure has several padding buffers within it
1538 * and when adding new EEPROM maps is subject to programmer errors
1539 * which may be very difficult to identify without explicitly
1540 * checking the resulting size of the eeprom map. */
1541 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1542
1543 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1544 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1545 return -ENOENT;
1546 }
1547
1548 rc = iwl_eeprom_aqcuire_semaphore(priv);
1549 if (rc < 0) {
1550 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1551 return -ENOENT;
1552 }
1553
1554 /* eeprom is an array of 16bit values */
1555 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1556 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1557 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1558
1559 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1560 i += IWL_EEPROM_ACCESS_DELAY) {
1561 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1562 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1563 break;
1564 udelay(IWL_EEPROM_ACCESS_DELAY);
1565 }
1566
1567 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1568 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1569 return -ETIMEDOUT;
1570 }
1571 e[addr / 2] = le16_to_cpu(r >> 16);
1572 }
1573
1574 return 0;
1575}
1576
1577/******************************************************************************
1578 *
1579 * Misc. internal state and helper functions
1580 *
1581 ******************************************************************************/
1582#ifdef CONFIG_IWLWIFI_DEBUG
1583
1584/**
1585 * iwl_report_frame - dump frame to syslog during debug sessions
1586 *
1587 * hack this function to show different aspects of received frames,
1588 * including selective frame dumps.
1589 * group100 parameter selects whether to show 1 out of 100 good frames.
1590 *
1591 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1592 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1593 * is 3945-specific and gives bad output for 4965. Need to split the
1594 * functionality, keep common stuff here.
1595 */
1596void iwl_report_frame(struct iwl_priv *priv,
1597 struct iwl_rx_packet *pkt,
1598 struct ieee80211_hdr *header, int group100)
1599{
1600 u32 to_us;
1601 u32 print_summary = 0;
1602 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1603 u32 hundred = 0;
1604 u32 dataframe = 0;
1605 u16 fc;
1606 u16 seq_ctl;
1607 u16 channel;
1608 u16 phy_flags;
1609 int rate_sym;
1610 u16 length;
1611 u16 status;
1612 u16 bcn_tmr;
1613 u32 tsf_low;
1614 u64 tsf;
1615 u8 rssi;
1616 u8 agc;
1617 u16 sig_avg;
1618 u16 noise_diff;
1619 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1620 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1621 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1622 u8 *data = IWL_RX_DATA(pkt);
1623
1624 /* MAC header */
1625 fc = le16_to_cpu(header->frame_control);
1626 seq_ctl = le16_to_cpu(header->seq_ctrl);
1627
1628 /* metadata */
1629 channel = le16_to_cpu(rx_hdr->channel);
1630 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1631 rate_sym = rx_hdr->rate;
1632 length = le16_to_cpu(rx_hdr->len);
1633
1634 /* end-of-frame status and timestamp */
1635 status = le32_to_cpu(rx_end->status);
1636 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1637 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1638 tsf = le64_to_cpu(rx_end->timestamp);
1639
1640 /* signal statistics */
1641 rssi = rx_stats->rssi;
1642 agc = rx_stats->agc;
1643 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1644 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1645
1646 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1647
1648 /* if data frame is to us and all is good,
1649 * (optionally) print summary for only 1 out of every 100 */
1650 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1651 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1652 dataframe = 1;
1653 if (!group100)
1654 print_summary = 1; /* print each frame */
1655 else if (priv->framecnt_to_us < 100) {
1656 priv->framecnt_to_us++;
1657 print_summary = 0;
1658 } else {
1659 priv->framecnt_to_us = 0;
1660 print_summary = 1;
1661 hundred = 1;
1662 }
1663 } else {
1664 /* print summary for all other frames */
1665 print_summary = 1;
1666 }
1667
1668 if (print_summary) {
1669 char *title;
1670 u32 rate;
1671
1672 if (hundred)
1673 title = "100Frames";
1674 else if (fc & IEEE80211_FCTL_RETRY)
1675 title = "Retry";
1676 else if (ieee80211_is_assoc_response(fc))
1677 title = "AscRsp";
1678 else if (ieee80211_is_reassoc_response(fc))
1679 title = "RasRsp";
1680 else if (ieee80211_is_probe_response(fc)) {
1681 title = "PrbRsp";
1682 print_dump = 1; /* dump frame contents */
1683 } else if (ieee80211_is_beacon(fc)) {
1684 title = "Beacon";
1685 print_dump = 1; /* dump frame contents */
1686 } else if (ieee80211_is_atim(fc))
1687 title = "ATIM";
1688 else if (ieee80211_is_auth(fc))
1689 title = "Auth";
1690 else if (ieee80211_is_deauth(fc))
1691 title = "DeAuth";
1692 else if (ieee80211_is_disassoc(fc))
1693 title = "DisAssoc";
1694 else
1695 title = "Frame";
1696
1697 rate = iwl_rate_index_from_plcp(rate_sym);
1698 if (rate == -1)
1699 rate = 0;
1700 else
1701 rate = iwl_rates[rate].ieee / 2;
1702
1703 /* print frame summary.
1704 * MAC addresses show just the last byte (for brevity),
1705 * but you can hack it to show more, if you'd like to. */
1706 if (dataframe)
1707 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1708 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1709 title, fc, header->addr1[5],
1710 length, rssi, channel, rate);
1711 else {
1712 /* src/dst addresses assume managed mode */
1713 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1714 "src=0x%02x, rssi=%u, tim=%lu usec, "
1715 "phy=0x%02x, chnl=%d\n",
1716 title, fc, header->addr1[5],
1717 header->addr3[5], rssi,
1718 tsf_low - priv->scan_start_tsf,
1719 phy_flags, channel);
1720 }
1721 }
1722 if (print_dump)
1723 iwl_print_hex_dump(IWL_DL_RX, data, length);
1724}
1725#endif
1726
1727static void iwl_unset_hw_setting(struct iwl_priv *priv)
1728{
1729 if (priv->hw_setting.shared_virt)
1730 pci_free_consistent(priv->pci_dev,
1731 sizeof(struct iwl_shared),
1732 priv->hw_setting.shared_virt,
1733 priv->hw_setting.shared_phys);
1734}
1735
1736/**
1737 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1738 *
1739 * return : set the bit for each supported rate insert in ie
1740 */
1741static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1742 u16 basic_rate, int max_count)
1743{
1744 u16 ret_rates = 0, bit;
1745 int i;
1746 u8 *rates;
1747
1748 rates = &(ie[1]);
1749
1750 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1751 if (bit & supported_rate) {
1752 ret_rates |= bit;
1753 rates[*ie] = iwl_rates[i].ieee |
1754 ((bit & basic_rate) ? 0x80 : 0x00);
1755 *ie = *ie + 1;
1756 if (*ie >= max_count)
1757 break;
1758 }
1759 }
1760
1761 return ret_rates;
1762}
1763
1764/**
1765 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1766 */
1767static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1768 struct ieee80211_mgmt *frame,
1769 int left, int is_direct)
1770{
1771 int len = 0;
1772 u8 *pos = NULL;
1773 u16 ret_rates;
1774
1775 /* Make sure there is enough space for the probe request,
1776 * two mandatory IEs and the data */
1777 left -= 24;
1778 if (left < 0)
1779 return 0;
1780 len += 24;
1781
1782 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1783 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1784 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1785 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1786 frame->seq_ctrl = 0;
1787
1788 /* fill in our indirect SSID IE */
1789 /* ...next IE... */
1790
1791 left -= 2;
1792 if (left < 0)
1793 return 0;
1794 len += 2;
1795 pos = &(frame->u.probe_req.variable[0]);
1796 *pos++ = WLAN_EID_SSID;
1797 *pos++ = 0;
1798
1799 /* fill in our direct SSID IE... */
1800 if (is_direct) {
1801 /* ...next IE... */
1802 left -= 2 + priv->essid_len;
1803 if (left < 0)
1804 return 0;
1805 /* ... fill it in... */
1806 *pos++ = WLAN_EID_SSID;
1807 *pos++ = priv->essid_len;
1808 memcpy(pos, priv->essid, priv->essid_len);
1809 pos += priv->essid_len;
1810 len += 2 + priv->essid_len;
1811 }
1812
1813 /* fill in supported rate */
1814 /* ...next IE... */
1815 left -= 2;
1816 if (left < 0)
1817 return 0;
1818 /* ... fill it in... */
1819 *pos++ = WLAN_EID_SUPP_RATES;
1820 *pos = 0;
1821 ret_rates = priv->active_rate = priv->rates_mask;
1822 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1823
1824 iwl_supported_rate_to_ie(pos, priv->active_rate,
1825 priv->active_rate_basic, left);
1826 len += 2 + *pos;
1827 pos += (*pos) + 1;
1828 ret_rates = ~ret_rates & priv->active_rate;
1829
1830 if (ret_rates == 0)
1831 goto fill_end;
1832
1833 /* fill in supported extended rate */
1834 /* ...next IE... */
1835 left -= 2;
1836 if (left < 0)
1837 return 0;
1838 /* ... fill it in... */
1839 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1840 *pos = 0;
1841 iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1842 if (*pos > 0)
1843 len += 2 + *pos;
1844
1845 fill_end:
1846 return (u16)len;
1847}
1848
1849/*
1850 * QoS support
1851*/
1852#ifdef CONFIG_IWLWIFI_QOS
1853static int iwl_send_qos_params_command(struct iwl_priv *priv,
1854 struct iwl_qosparam_cmd *qos)
1855{
1856
1857 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1858 sizeof(struct iwl_qosparam_cmd), qos);
1859}
1860
1861static void iwl_reset_qos(struct iwl_priv *priv)
1862{
1863 u16 cw_min = 15;
1864 u16 cw_max = 1023;
1865 u8 aifs = 2;
1866 u8 is_legacy = 0;
1867 unsigned long flags;
1868 int i;
1869
1870 spin_lock_irqsave(&priv->lock, flags);
1871 priv->qos_data.qos_active = 0;
1872
1873 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1874 if (priv->qos_data.qos_enable)
1875 priv->qos_data.qos_active = 1;
1876 if (!(priv->active_rate & 0xfff0)) {
1877 cw_min = 31;
1878 is_legacy = 1;
1879 }
1880 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1881 if (priv->qos_data.qos_enable)
1882 priv->qos_data.qos_active = 1;
1883 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1884 cw_min = 31;
1885 is_legacy = 1;
1886 }
1887
1888 if (priv->qos_data.qos_active)
1889 aifs = 3;
1890
1891 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1892 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1893 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1894 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1895 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1896
1897 if (priv->qos_data.qos_active) {
1898 i = 1;
1899 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1900 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1901 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1902 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1903 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1904
1905 i = 2;
1906 priv->qos_data.def_qos_parm.ac[i].cw_min =
1907 cpu_to_le16((cw_min + 1) / 2 - 1);
1908 priv->qos_data.def_qos_parm.ac[i].cw_max =
1909 cpu_to_le16(cw_max);
1910 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1911 if (is_legacy)
1912 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1913 cpu_to_le16(6016);
1914 else
1915 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1916 cpu_to_le16(3008);
1917 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1918
1919 i = 3;
1920 priv->qos_data.def_qos_parm.ac[i].cw_min =
1921 cpu_to_le16((cw_min + 1) / 4 - 1);
1922 priv->qos_data.def_qos_parm.ac[i].cw_max =
1923 cpu_to_le16((cw_max + 1) / 2 - 1);
1924 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1925 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1926 if (is_legacy)
1927 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1928 cpu_to_le16(3264);
1929 else
1930 priv->qos_data.def_qos_parm.ac[i].edca_txop =
1931 cpu_to_le16(1504);
1932 } else {
1933 for (i = 1; i < 4; i++) {
1934 priv->qos_data.def_qos_parm.ac[i].cw_min =
1935 cpu_to_le16(cw_min);
1936 priv->qos_data.def_qos_parm.ac[i].cw_max =
1937 cpu_to_le16(cw_max);
1938 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1939 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1940 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1941 }
1942 }
1943 IWL_DEBUG_QOS("set QoS to default \n");
1944
1945 spin_unlock_irqrestore(&priv->lock, flags);
1946}
1947
1948static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1949{
1950 unsigned long flags;
1951
1952 if (priv == NULL)
1953 return;
1954
1955 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1956 return;
1957
1958 if (!priv->qos_data.qos_enable)
1959 return;
1960
1961 spin_lock_irqsave(&priv->lock, flags);
1962 priv->qos_data.def_qos_parm.qos_flags = 0;
1963
1964 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1965 !priv->qos_data.qos_cap.q_AP.txop_request)
1966 priv->qos_data.def_qos_parm.qos_flags |=
1967 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1968
1969 if (priv->qos_data.qos_active)
1970 priv->qos_data.def_qos_parm.qos_flags |=
1971 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1972
1973 spin_unlock_irqrestore(&priv->lock, flags);
1974
1975 if (force || iwl_is_associated(priv)) {
1976 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1977 priv->qos_data.qos_active);
1978
1979 iwl_send_qos_params_command(priv,
1980 &(priv->qos_data.def_qos_parm));
1981 }
1982}
1983
1984#endif /* CONFIG_IWLWIFI_QOS */
1985/*
1986 * Power management (not Tx power!) functions
1987 */
1988#define MSEC_TO_USEC 1024
1989
1990#define NOSLP __constant_cpu_to_le32(0)
1991#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1992#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1993#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1994 __constant_cpu_to_le32(X1), \
1995 __constant_cpu_to_le32(X2), \
1996 __constant_cpu_to_le32(X3), \
1997 __constant_cpu_to_le32(X4)}
1998
1999
2000/* default power management (not Tx power) table values */
2001/* for tim 0-10 */
2002static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2003 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2004 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2005 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2006 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2007 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2008 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2009};
2010
2011/* for tim > 10 */
2012static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2013 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2014 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2015 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2016 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2017 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2018 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2019 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2020 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2021 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2022 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2023};
2024
2025int iwl_power_init_handle(struct iwl_priv *priv)
2026{
2027 int rc = 0, i;
2028 struct iwl_power_mgr *pow_data;
2029 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2030 u16 pci_pm;
2031
2032 IWL_DEBUG_POWER("Initialize power \n");
2033
2034 pow_data = &(priv->power_data);
2035
2036 memset(pow_data, 0, sizeof(*pow_data));
2037
2038 pow_data->active_index = IWL_POWER_RANGE_0;
2039 pow_data->dtim_val = 0xffff;
2040
2041 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2042 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2043
2044 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2045 if (rc != 0)
2046 return 0;
2047 else {
2048 struct iwl_powertable_cmd *cmd;
2049
2050 IWL_DEBUG_POWER("adjust power command flags\n");
2051
2052 for (i = 0; i < IWL_POWER_AC; i++) {
2053 cmd = &pow_data->pwr_range_0[i].cmd;
2054
2055 if (pci_pm & 0x1)
2056 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2057 else
2058 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2059 }
2060 }
2061 return rc;
2062}
2063
2064static int iwl_update_power_cmd(struct iwl_priv *priv,
2065 struct iwl_powertable_cmd *cmd, u32 mode)
2066{
2067 int rc = 0, i;
2068 u8 skip;
2069 u32 max_sleep = 0;
2070 struct iwl_power_vec_entry *range;
2071 u8 period = 0;
2072 struct iwl_power_mgr *pow_data;
2073
2074 if (mode > IWL_POWER_INDEX_5) {
2075 IWL_DEBUG_POWER("Error invalid power mode \n");
2076 return -1;
2077 }
2078 pow_data = &(priv->power_data);
2079
2080 if (pow_data->active_index == IWL_POWER_RANGE_0)
2081 range = &pow_data->pwr_range_0[0];
2082 else
2083 range = &pow_data->pwr_range_1[1];
2084
2085 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2086
2087#ifdef IWL_MAC80211_DISABLE
2088 if (priv->assoc_network != NULL) {
2089 unsigned long flags;
2090
2091 period = priv->assoc_network->tim.tim_period;
2092 }
2093#endif /*IWL_MAC80211_DISABLE */
2094 skip = range[mode].no_dtim;
2095
2096 if (period == 0) {
2097 period = 1;
2098 skip = 0;
2099 }
2100
2101 if (skip == 0) {
2102 max_sleep = period;
2103 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2104 } else {
2105 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2106 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2107 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2108 }
2109
2110 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2111 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2112 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2113 }
2114
2115 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2116 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2117 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2118 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2119 le32_to_cpu(cmd->sleep_interval[0]),
2120 le32_to_cpu(cmd->sleep_interval[1]),
2121 le32_to_cpu(cmd->sleep_interval[2]),
2122 le32_to_cpu(cmd->sleep_interval[3]),
2123 le32_to_cpu(cmd->sleep_interval[4]));
2124
2125 return rc;
2126}
2127
2128static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2129{
2130 u32 final_mode = mode;
2131 int rc;
2132 struct iwl_powertable_cmd cmd;
2133
2134 /* If on battery, set to 3,
2135 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2136 * else user level */
2137 switch (mode) {
2138 case IWL_POWER_BATTERY:
2139 final_mode = IWL_POWER_INDEX_3;
2140 break;
2141 case IWL_POWER_AC:
2142 final_mode = IWL_POWER_MODE_CAM;
2143 break;
2144 default:
2145 final_mode = mode;
2146 break;
2147 }
2148
2149 iwl_update_power_cmd(priv, &cmd, final_mode);
2150
2151 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2152
2153 if (final_mode == IWL_POWER_MODE_CAM)
2154 clear_bit(STATUS_POWER_PMI, &priv->status);
2155 else
2156 set_bit(STATUS_POWER_PMI, &priv->status);
2157
2158 return rc;
2159}
2160
2161int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2162{
2163 /* Filter incoming packets to determine if they are targeted toward
2164 * this network, discarding packets coming from ourselves */
2165 switch (priv->iw_mode) {
2166 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2167 /* packets from our adapter are dropped (echo) */
2168 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2169 return 0;
2170 /* {broad,multi}cast packets to our IBSS go through */
2171 if (is_multicast_ether_addr(header->addr1))
2172 return !compare_ether_addr(header->addr3, priv->bssid);
2173 /* packets to our adapter go through */
2174 return !compare_ether_addr(header->addr1, priv->mac_addr);
2175 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2176 /* packets from our adapter are dropped (echo) */
2177 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2178 return 0;
2179 /* {broad,multi}cast packets to our BSS go through */
2180 if (is_multicast_ether_addr(header->addr1))
2181 return !compare_ether_addr(header->addr2, priv->bssid);
2182 /* packets to our adapter go through */
2183 return !compare_ether_addr(header->addr1, priv->mac_addr);
2184 }
2185
2186 return 1;
2187}
2188
2189#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2190
2191const char *iwl_get_tx_fail_reason(u32 status)
2192{
2193 switch (status & TX_STATUS_MSK) {
2194 case TX_STATUS_SUCCESS:
2195 return "SUCCESS";
2196 TX_STATUS_ENTRY(SHORT_LIMIT);
2197 TX_STATUS_ENTRY(LONG_LIMIT);
2198 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2199 TX_STATUS_ENTRY(MGMNT_ABORT);
2200 TX_STATUS_ENTRY(NEXT_FRAG);
2201 TX_STATUS_ENTRY(LIFE_EXPIRE);
2202 TX_STATUS_ENTRY(DEST_PS);
2203 TX_STATUS_ENTRY(ABORTED);
2204 TX_STATUS_ENTRY(BT_RETRY);
2205 TX_STATUS_ENTRY(STA_INVALID);
2206 TX_STATUS_ENTRY(FRAG_DROPPED);
2207 TX_STATUS_ENTRY(TID_DISABLE);
2208 TX_STATUS_ENTRY(FRAME_FLUSHED);
2209 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2210 TX_STATUS_ENTRY(TX_LOCKED);
2211 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2212 }
2213
2214 return "UNKNOWN";
2215}
2216
2217/**
2218 * iwl_scan_cancel - Cancel any currently executing HW scan
2219 *
2220 * NOTE: priv->mutex is not required before calling this function
2221 */
2222static int iwl_scan_cancel(struct iwl_priv *priv)
2223{
2224 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2225 clear_bit(STATUS_SCANNING, &priv->status);
2226 return 0;
2227 }
2228
2229 if (test_bit(STATUS_SCANNING, &priv->status)) {
2230 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2231 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2232 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2233 queue_work(priv->workqueue, &priv->abort_scan);
2234
2235 } else
2236 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2237
2238 return test_bit(STATUS_SCANNING, &priv->status);
2239 }
2240
2241 return 0;
2242}
2243
2244/**
2245 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2246 * @ms: amount of time to wait (in milliseconds) for scan to abort
2247 *
2248 * NOTE: priv->mutex must be held before calling this function
2249 */
2250static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2251{
2252 unsigned long now = jiffies;
2253 int ret;
2254
2255 ret = iwl_scan_cancel(priv);
2256 if (ret && ms) {
2257 mutex_unlock(&priv->mutex);
2258 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2259 test_bit(STATUS_SCANNING, &priv->status))
2260 msleep(1);
2261 mutex_lock(&priv->mutex);
2262
2263 return test_bit(STATUS_SCANNING, &priv->status);
2264 }
2265
2266 return ret;
2267}
2268
2269static void iwl_sequence_reset(struct iwl_priv *priv)
2270{
2271 /* Reset ieee stats */
2272
2273 /* We don't reset the net_device_stats (ieee->stats) on
2274 * re-association */
2275
2276 priv->last_seq_num = -1;
2277 priv->last_frag_num = -1;
2278 priv->last_packet_time = 0;
2279
2280 iwl_scan_cancel(priv);
2281}
2282
2283#define MAX_UCODE_BEACON_INTERVAL 1024
2284#define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2285
2286static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2287{
2288 u16 new_val = 0;
2289 u16 beacon_factor = 0;
2290
2291 beacon_factor =
2292 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2293 / MAX_UCODE_BEACON_INTERVAL;
2294 new_val = beacon_val / beacon_factor;
2295
2296 return cpu_to_le16(new_val);
2297}
2298
2299static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2300{
2301 u64 interval_tm_unit;
2302 u64 tsf, result;
2303 unsigned long flags;
2304 struct ieee80211_conf *conf = NULL;
2305 u16 beacon_int = 0;
2306
2307 conf = ieee80211_get_hw_conf(priv->hw);
2308
2309 spin_lock_irqsave(&priv->lock, flags);
2310 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2311 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2312
2313 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2314
2315 tsf = priv->timestamp1;
2316 tsf = ((tsf << 32) | priv->timestamp0);
2317
2318 beacon_int = priv->beacon_int;
2319 spin_unlock_irqrestore(&priv->lock, flags);
2320
2321 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2322 if (beacon_int == 0) {
2323 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2324 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2325 } else {
2326 priv->rxon_timing.beacon_interval =
2327 cpu_to_le16(beacon_int);
2328 priv->rxon_timing.beacon_interval =
2329 iwl_adjust_beacon_interval(
2330 le16_to_cpu(priv->rxon_timing.beacon_interval));
2331 }
2332
2333 priv->rxon_timing.atim_window = 0;
2334 } else {
2335 priv->rxon_timing.beacon_interval =
2336 iwl_adjust_beacon_interval(conf->beacon_int);
2337 /* TODO: we need to get atim_window from upper stack
2338 * for now we set to 0 */
2339 priv->rxon_timing.atim_window = 0;
2340 }
2341
2342 interval_tm_unit =
2343 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2344 result = do_div(tsf, interval_tm_unit);
2345 priv->rxon_timing.beacon_init_val =
2346 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2347
2348 IWL_DEBUG_ASSOC
2349 ("beacon interval %d beacon timer %d beacon tim %d\n",
2350 le16_to_cpu(priv->rxon_timing.beacon_interval),
2351 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2352 le16_to_cpu(priv->rxon_timing.atim_window));
2353}
2354
2355static int iwl_scan_initiate(struct iwl_priv *priv)
2356{
2357 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2358 IWL_ERROR("APs don't scan.\n");
2359 return 0;
2360 }
2361
2362 if (!iwl_is_ready_rf(priv)) {
2363 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2364 return -EIO;
2365 }
2366
2367 if (test_bit(STATUS_SCANNING, &priv->status)) {
2368 IWL_DEBUG_SCAN("Scan already in progress.\n");
2369 return -EAGAIN;
2370 }
2371
2372 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2373 IWL_DEBUG_SCAN("Scan request while abort pending. "
2374 "Queuing.\n");
2375 return -EAGAIN;
2376 }
2377
2378 IWL_DEBUG_INFO("Starting scan...\n");
2379 priv->scan_bands = 2;
2380 set_bit(STATUS_SCANNING, &priv->status);
2381 priv->scan_start = jiffies;
2382 priv->scan_pass_start = priv->scan_start;
2383
2384 queue_work(priv->workqueue, &priv->request_scan);
2385
2386 return 0;
2387}
2388
2389static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2390{
2391 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2392
2393 if (hw_decrypt)
2394 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2395 else
2396 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2397
2398 return 0;
2399}
2400
2401static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2402{
2403 if (phymode == MODE_IEEE80211A) {
2404 priv->staging_rxon.flags &=
2405 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2406 | RXON_FLG_CCK_MSK);
2407 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2408 } else {
2409 /* Copied from iwl_bg_post_associate() */
2410 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2411 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2412 else
2413 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2414
2415 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2416 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2417
2418 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2419 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2420 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2421 }
2422}
2423
2424/*
2425 * initilize rxon structure with default values fromm eeprom
2426 */
2427static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2428{
2429 const struct iwl_channel_info *ch_info;
2430
2431 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2432
2433 switch (priv->iw_mode) {
2434 case IEEE80211_IF_TYPE_AP:
2435 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2436 break;
2437
2438 case IEEE80211_IF_TYPE_STA:
2439 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2440 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2441 break;
2442
2443 case IEEE80211_IF_TYPE_IBSS:
2444 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2445 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2446 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2447 RXON_FILTER_ACCEPT_GRP_MSK;
2448 break;
2449
2450 case IEEE80211_IF_TYPE_MNTR:
2451 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2452 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2453 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2454 break;
2455 }
2456
2457#if 0
2458 /* TODO: Figure out when short_preamble would be set and cache from
2459 * that */
2460 if (!hw_to_local(priv->hw)->short_preamble)
2461 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2462 else
2463 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2464#endif
2465
2466 ch_info = iwl_get_channel_info(priv, priv->phymode,
2467 le16_to_cpu(priv->staging_rxon.channel));
2468
2469 if (!ch_info)
2470 ch_info = &priv->channel_info[0];
2471
2472 /*
2473 * in some case A channels are all non IBSS
2474 * in this case force B/G channel
2475 */
2476 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2477 !(is_channel_ibss(ch_info)))
2478 ch_info = &priv->channel_info[0];
2479
2480 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2481 if (is_channel_a_band(ch_info))
2482 priv->phymode = MODE_IEEE80211A;
2483 else
2484 priv->phymode = MODE_IEEE80211G;
2485
2486 iwl_set_flags_for_phymode(priv, priv->phymode);
2487
2488 priv->staging_rxon.ofdm_basic_rates =
2489 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2490 priv->staging_rxon.cck_basic_rates =
2491 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2492}
2493
2494static int iwl_set_mode(struct iwl_priv *priv, int mode)
2495{
2496 if (!iwl_is_ready_rf(priv))
2497 return -EAGAIN;
2498
2499 if (mode == IEEE80211_IF_TYPE_IBSS) {
2500 const struct iwl_channel_info *ch_info;
2501
2502 ch_info = iwl_get_channel_info(priv,
2503 priv->phymode,
2504 le16_to_cpu(priv->staging_rxon.channel));
2505
2506 if (!ch_info || !is_channel_ibss(ch_info)) {
2507 IWL_ERROR("channel %d not IBSS channel\n",
2508 le16_to_cpu(priv->staging_rxon.channel));
2509 return -EINVAL;
2510 }
2511 }
2512
2513 cancel_delayed_work(&priv->scan_check);
2514 if (iwl_scan_cancel_timeout(priv, 100)) {
2515 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2516 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2517 return -EAGAIN;
2518 }
2519
2520 priv->iw_mode = mode;
2521
2522 iwl_connection_init_rx_config(priv);
2523 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2524
2525 iwl_clear_stations_table(priv);
2526
2527 iwl_commit_rxon(priv);
2528
2529 return 0;
2530}
2531
2532static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2533 struct ieee80211_tx_control *ctl,
2534 struct iwl_cmd *cmd,
2535 struct sk_buff *skb_frag,
2536 int last_frag)
2537{
2538 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2539
2540 switch (keyinfo->alg) {
2541 case ALG_CCMP:
2542 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2543 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2544 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2545 break;
2546
2547 case ALG_TKIP:
2548#if 0
2549 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2550
2551 if (last_frag)
2552 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2553 8);
2554 else
2555 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2556#endif
2557 break;
2558
2559 case ALG_WEP:
2560 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2561 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2562
2563 if (keyinfo->keylen == 13)
2564 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2565
2566 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2567
2568 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2569 "with key %d\n", ctl->key_idx);
2570 break;
2571
2572 case ALG_NONE:
2573 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2574 break;
2575
2576 default:
2577 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2578 break;
2579 }
2580}
2581
2582/*
2583 * handle build REPLY_TX command notification.
2584 */
2585static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2586 struct iwl_cmd *cmd,
2587 struct ieee80211_tx_control *ctrl,
2588 struct ieee80211_hdr *hdr,
2589 int is_unicast, u8 std_id)
2590{
2591 __le16 *qc;
2592 u16 fc = le16_to_cpu(hdr->frame_control);
2593 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2594
2595 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2596 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2597 tx_flags |= TX_CMD_FLG_ACK_MSK;
2598 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2599 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2600 if (ieee80211_is_probe_response(fc) &&
2601 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2602 tx_flags |= TX_CMD_FLG_TSF_MSK;
2603 } else {
2604 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2605 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2606 }
2607
2608 cmd->cmd.tx.sta_id = std_id;
2609 if (ieee80211_get_morefrag(hdr))
2610 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2611
2612 qc = ieee80211_get_qos_ctrl(hdr);
2613 if (qc) {
2614 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2615 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2616 } else
2617 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2618
2619 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2620 tx_flags |= TX_CMD_FLG_RTS_MSK;
2621 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2622 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2623 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2624 tx_flags |= TX_CMD_FLG_CTS_MSK;
2625 }
2626
2627 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2628 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2629
2630 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2631 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2632 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2633 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2634 cmd->cmd.tx.timeout.pm_frame_timeout =
2635 cpu_to_le16(3);
2636 else
2637 cmd->cmd.tx.timeout.pm_frame_timeout =
2638 cpu_to_le16(2);
2639 } else
2640 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2641
2642 cmd->cmd.tx.driver_txop = 0;
2643 cmd->cmd.tx.tx_flags = tx_flags;
2644 cmd->cmd.tx.next_frame_len = 0;
2645}
2646
2647static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2648{
2649 int sta_id;
2650 u16 fc = le16_to_cpu(hdr->frame_control);
2651
2652 /* If this frame is broadcast or not data then use the broadcast
2653 * station id */
2654 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2655 is_multicast_ether_addr(hdr->addr1))
2656 return priv->hw_setting.bcast_sta_id;
2657
2658 switch (priv->iw_mode) {
2659
2660 /* If this frame is part of a BSS network (we're a station), then
2661 * we use the AP's station id */
2662 case IEEE80211_IF_TYPE_STA:
2663 return IWL_AP_ID;
2664
2665 /* If we are an AP, then find the station, or use BCAST */
2666 case IEEE80211_IF_TYPE_AP:
2667 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2668 if (sta_id != IWL_INVALID_STATION)
2669 return sta_id;
2670 return priv->hw_setting.bcast_sta_id;
2671
2672 /* If this frame is part of a IBSS network, then we use the
2673 * target specific station id */
0795af57
JP		 2674 case IEEE80211_IF_TYPE_IBSS: {
2675 DECLARE_MAC_BUF(mac);
2676
b481de9c
ZY		 2677 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2678 if (sta_id != IWL_INVALID_STATION)
2679 return sta_id;
2680
2681 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2682
2683 if (sta_id != IWL_INVALID_STATION)
2684 return sta_id;
2685
0795af57 2686 IWL_DEBUG_DROP("Station %s not in station map. "
b481de9c 2687 "Defaulting to broadcast...\n",
0795af57 2688 print_mac(mac, hdr->addr1));
b481de9c
ZY		 2689 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2690 return priv->hw_setting.bcast_sta_id;
0795af57 2691 }
b481de9c
ZY		 2692 default:
2693 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2694 return priv->hw_setting.bcast_sta_id;
2695 }
2696}
2697
2698/*
2699 * start REPLY_TX command process
2700 */
2701static int iwl_tx_skb(struct iwl_priv *priv,
2702 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2703{
2704 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2705 struct iwl_tfd_frame *tfd;
2706 u32 *control_flags;
2707 int txq_id = ctl->queue;
2708 struct iwl_tx_queue *txq = NULL;
2709 struct iwl_queue *q = NULL;
2710 dma_addr_t phys_addr;
2711 dma_addr_t txcmd_phys;
2712 struct iwl_cmd *out_cmd = NULL;
2713 u16 len, idx, len_org;
2714 u8 id, hdr_len, unicast;
2715 u8 sta_id;
2716 u16 seq_number = 0;
2717 u16 fc;
2718 __le16 *qc;
2719 u8 wait_write_ptr = 0;
2720 unsigned long flags;
2721 int rc;
2722
2723 spin_lock_irqsave(&priv->lock, flags);
2724 if (iwl_is_rfkill(priv)) {
2725 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2726 goto drop_unlock;
2727 }
2728
2729 if (!priv->interface_id) {
2730 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2731 goto drop_unlock;
2732 }
2733
2734 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2735 IWL_ERROR("ERROR: No TX rate available.\n");
2736 goto drop_unlock;
2737 }
2738
2739 unicast = !is_multicast_ether_addr(hdr->addr1);
2740 id = 0;
2741
2742 fc = le16_to_cpu(hdr->frame_control);
2743
2744#ifdef CONFIG_IWLWIFI_DEBUG
2745 if (ieee80211_is_auth(fc))
2746 IWL_DEBUG_TX("Sending AUTH frame\n");
2747 else if (ieee80211_is_assoc_request(fc))
2748 IWL_DEBUG_TX("Sending ASSOC frame\n");
2749 else if (ieee80211_is_reassoc_request(fc))
2750 IWL_DEBUG_TX("Sending REASSOC frame\n");
2751#endif
2752
2753 if (!iwl_is_associated(priv) &&
2754 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2755 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2756 goto drop_unlock;
2757 }
2758
2759 spin_unlock_irqrestore(&priv->lock, flags);
2760
2761 hdr_len = ieee80211_get_hdrlen(fc);
2762 sta_id = iwl_get_sta_id(priv, hdr);
2763 if (sta_id == IWL_INVALID_STATION) {
0795af57
JP		 2764 DECLARE_MAC_BUF(mac);
2765
2766 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2767 print_mac(mac, hdr->addr1));
b481de9c
ZY		 2768 goto drop;
2769 }
2770
2771 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2772
2773 qc = ieee80211_get_qos_ctrl(hdr);
2774 if (qc) {
2775 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2776 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2777 IEEE80211_SCTL_SEQ;
2778 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2779 (hdr->seq_ctrl &
2780 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2781 seq_number += 0x10;
2782 }
2783 txq = &priv->txq[txq_id];
2784 q = &txq->q;
2785
2786 spin_lock_irqsave(&priv->lock, flags);
2787
2788 tfd = &txq->bd[q->first_empty];
2789 memset(tfd, 0, sizeof(*tfd));
2790 control_flags = (u32 *) tfd;
2791 idx = get_cmd_index(q, q->first_empty, 0);
2792
2793 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2794 txq->txb[q->first_empty].skb[0] = skb;
2795 memcpy(&(txq->txb[q->first_empty].status.control),
2796 ctl, sizeof(struct ieee80211_tx_control));
2797 out_cmd = &txq->cmd[idx];
2798 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2799 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2800 out_cmd->hdr.cmd = REPLY_TX;
2801 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2802 INDEX_TO_SEQ(q->first_empty)));
2803 /* copy frags header */
2804 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2805
2806 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2807 len = priv->hw_setting.tx_cmd_len +
2808 sizeof(struct iwl_cmd_header) + hdr_len;
2809
2810 len_org = len;
2811 len = (len + 3) & ~3;
2812
2813 if (len_org != len)
2814 len_org = 1;
2815 else
2816 len_org = 0;
2817
2818 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2819 offsetof(struct iwl_cmd, hdr);
2820
2821 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2822
2823 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2824 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2825
2826 /* 802.11 null functions have no payload... */
2827 len = skb->len - hdr_len;
2828 if (len) {
2829 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2830 len, PCI_DMA_TODEVICE);
2831 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2832 }
2833
2834 /* If there is no payload, then only one TFD is used */
2835 if (!len)
2836 *control_flags = TFD_CTL_COUNT_SET(1);
2837 else
2838 *control_flags = TFD_CTL_COUNT_SET(2) |
2839 TFD_CTL_PAD_SET(U32_PAD(len));
2840
2841 len = (u16)skb->len;
2842 out_cmd->cmd.tx.len = cpu_to_le16(len);
2843
2844 /* TODO need this for burst mode later on */
2845 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2846
2847 /* set is_hcca to 0; it probably will never be implemented */
2848 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2849
2850 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2851 out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2852
2853 if (!ieee80211_get_morefrag(hdr)) {
2854 txq->need_update = 1;
2855 if (qc) {
2856 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2857 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2858 }
2859 } else {
2860 wait_write_ptr = 1;
2861 txq->need_update = 0;
2862 }
2863
2864 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2865 sizeof(out_cmd->cmd.tx));
2866
2867 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2868 ieee80211_get_hdrlen(fc));
2869
2870 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2871 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2872 spin_unlock_irqrestore(&priv->lock, flags);
2873
2874 if (rc)
2875 return rc;
2876
2877 if ((iwl_queue_space(q) < q->high_mark)
2878 && priv->mac80211_registered) {
2879 if (wait_write_ptr) {
2880 spin_lock_irqsave(&priv->lock, flags);
2881 txq->need_update = 1;
2882 iwl_tx_queue_update_write_ptr(priv, txq);
2883 spin_unlock_irqrestore(&priv->lock, flags);
2884 }
2885
2886 ieee80211_stop_queue(priv->hw, ctl->queue);
2887 }
2888
2889 return 0;
2890
2891drop_unlock:
2892 spin_unlock_irqrestore(&priv->lock, flags);
2893drop:
2894 return -1;
2895}
2896
2897static void iwl_set_rate(struct iwl_priv *priv)
2898{
2899 const struct ieee80211_hw_mode *hw = NULL;
2900 struct ieee80211_rate *rate;
2901 int i;
2902
2903 hw = iwl_get_hw_mode(priv, priv->phymode);
2904
2905 priv->active_rate = 0;
2906 priv->active_rate_basic = 0;
2907
2908 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2909 hw->mode == MODE_IEEE80211A ?
2910 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2911
2912 for (i = 0; i < hw->num_rates; i++) {
2913 rate = &(hw->rates[i]);
2914 if ((rate->val < IWL_RATE_COUNT) &&
2915 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2916 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2917 rate->val, iwl_rates[rate->val].plcp,
2918 (rate->flags & IEEE80211_RATE_BASIC) ?
2919 "*" : "");
2920 priv->active_rate |= (1 << rate->val);
2921 if (rate->flags & IEEE80211_RATE_BASIC)
2922 priv->active_rate_basic |= (1 << rate->val);
2923 } else
2924 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2925 rate->val, iwl_rates[rate->val].plcp);
2926 }
2927
2928 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2929 priv->active_rate, priv->active_rate_basic);
2930
2931 /*
2932 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2933 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2934 * OFDM
2935 */
2936 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2937 priv->staging_rxon.cck_basic_rates =
2938 ((priv->active_rate_basic &
2939 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2940 else
2941 priv->staging_rxon.cck_basic_rates =
2942 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2943
2944 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2945 priv->staging_rxon.ofdm_basic_rates =
2946 ((priv->active_rate_basic &
2947 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2948 IWL_FIRST_OFDM_RATE) & 0xFF;
2949 else
2950 priv->staging_rxon.ofdm_basic_rates =
2951 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2952}
2953
2954static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2955{
2956 unsigned long flags;
2957
2958 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2959 return;
2960
2961 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2962 disable_radio ? "OFF" : "ON");
2963
2964 if (disable_radio) {
2965 iwl_scan_cancel(priv);
2966 /* FIXME: This is a workaround for AP */
2967 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2968 spin_lock_irqsave(&priv->lock, flags);
2969 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2970 CSR_UCODE_SW_BIT_RFKILL);
2971 spin_unlock_irqrestore(&priv->lock, flags);
2972 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2973 set_bit(STATUS_RF_KILL_SW, &priv->status);
2974 }
2975 return;
2976 }
2977
2978 spin_lock_irqsave(&priv->lock, flags);
2979 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2980
2981 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2982 spin_unlock_irqrestore(&priv->lock, flags);
2983
2984 /* wake up ucode */
2985 msleep(10);
2986
2987 spin_lock_irqsave(&priv->lock, flags);
2988 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2989 if (!iwl_grab_restricted_access(priv))
2990 iwl_release_restricted_access(priv);
2991 spin_unlock_irqrestore(&priv->lock, flags);
2992
2993 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2994 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2995 "disabled by HW switch\n");
2996 return;
2997 }
2998
2999 queue_work(priv->workqueue, &priv->restart);
3000 return;
3001}
3002
3003void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3004 u32 decrypt_res, struct ieee80211_rx_status *stats)
3005{
3006 u16 fc =
3007 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3008
3009 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3010 return;
3011
3012 if (!(fc & IEEE80211_FCTL_PROTECTED))
3013 return;
3014
3015 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3016 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3017 case RX_RES_STATUS_SEC_TYPE_TKIP:
3018 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3019 RX_RES_STATUS_BAD_ICV_MIC)
3020 stats->flag |= RX_FLAG_MMIC_ERROR;
3021 case RX_RES_STATUS_SEC_TYPE_WEP:
3022 case RX_RES_STATUS_SEC_TYPE_CCMP:
3023 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3024 RX_RES_STATUS_DECRYPT_OK) {
3025 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3026 stats->flag |= RX_FLAG_DECRYPTED;
3027 }
3028 break;
3029
3030 default:
3031 break;
3032 }
3033}
3034
3035void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3036 struct iwl_rx_mem_buffer *rxb,
3037 void *data, short len,
3038 struct ieee80211_rx_status *stats,
3039 u16 phy_flags)
3040{
3041 struct iwl_rt_rx_hdr *iwl_rt;
3042
3043 /* First cache any information we need before we overwrite
3044 * the information provided in the skb from the hardware */
3045 s8 signal = stats->ssi;
3046 s8 noise = 0;
3047 int rate = stats->rate;
3048 u64 tsf = stats->mactime;
3049 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3050
3051 /* We received data from the HW, so stop the watchdog */
3052 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3053 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3054 return;
3055 }
3056
3057 /* copy the frame data to write after where the radiotap header goes */
3058 iwl_rt = (void *)rxb->skb->data;
3059 memmove(iwl_rt->payload, data, len);
3060
3061 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3062 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3063
3064 /* total header + data */
3065 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3066
3067 /* Set the size of the skb to the size of the frame */
3068 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3069
3070 /* Big bitfield of all the fields we provide in radiotap */
3071 iwl_rt->rt_hdr.it_present =
3072 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3073 (1 << IEEE80211_RADIOTAP_FLAGS) |
3074 (1 << IEEE80211_RADIOTAP_RATE) |
3075 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3076 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3077 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3078 (1 << IEEE80211_RADIOTAP_ANTENNA));
3079
3080 /* Zero the flags, we'll add to them as we go */
3081 iwl_rt->rt_flags = 0;
3082
3083 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3084
3085 /* Convert to dBm */
3086 iwl_rt->rt_dbmsignal = signal;
3087 iwl_rt->rt_dbmnoise = noise;
3088
3089 /* Convert the channel frequency and set the flags */
3090 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3091 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3092 iwl_rt->rt_chbitmask =
3093 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3094 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3095 iwl_rt->rt_chbitmask =
3096 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3097 else /* 802.11g */
3098 iwl_rt->rt_chbitmask =
3099 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3100
3101 rate = iwl_rate_index_from_plcp(rate);
3102 if (rate == -1)
3103 iwl_rt->rt_rate = 0;
3104 else
3105 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3106
3107 /* antenna number */
3108 iwl_rt->rt_antenna =
3109 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3110
3111 /* set the preamble flag if we have it */
3112 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3113 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3114
3115 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3116
3117 stats->flag |= RX_FLAG_RADIOTAP;
3118 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3119 rxb->skb = NULL;
3120}
3121
3122
3123#define IWL_PACKET_RETRY_TIME HZ
3124
3125int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3126{
3127 u16 sc = le16_to_cpu(header->seq_ctrl);
3128 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3129 u16 frag = sc & IEEE80211_SCTL_FRAG;
3130 u16 *last_seq, *last_frag;
3131 unsigned long *last_time;
3132
3133 switch (priv->iw_mode) {
3134 case IEEE80211_IF_TYPE_IBSS:{
3135 struct list_head *p;
3136 struct iwl_ibss_seq *entry = NULL;
3137 u8 *mac = header->addr2;
3138 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3139
3140 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3141 entry =
3142 list_entry(p, struct iwl_ibss_seq, list);
3143 if (!compare_ether_addr(entry->mac, mac))
3144 break;
3145 }
3146 if (p == &priv->ibss_mac_hash[index]) {
3147 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3148 if (!entry) {
3149 IWL_ERROR
3150 ("Cannot malloc new mac entry\n");
3151 return 0;
3152 }
3153 memcpy(entry->mac, mac, ETH_ALEN);
3154 entry->seq_num = seq;
3155 entry->frag_num = frag;
3156 entry->packet_time = jiffies;
3157 list_add(&entry->list,
3158 &priv->ibss_mac_hash[index]);
3159 return 0;
3160 }
3161 last_seq = &entry->seq_num;
3162 last_frag = &entry->frag_num;
3163 last_time = &entry->packet_time;
3164 break;
3165 }
3166 case IEEE80211_IF_TYPE_STA:
3167 last_seq = &priv->last_seq_num;
3168 last_frag = &priv->last_frag_num;
3169 last_time = &priv->last_packet_time;
3170 break;
3171 default:
3172 return 0;
3173 }
3174 if ((*last_seq == seq) &&
3175 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3176 if (*last_frag == frag)
3177 goto drop;
3178 if (*last_frag + 1 != frag)
3179 /* out-of-order fragment */
3180 goto drop;
3181 } else
3182 *last_seq = seq;
3183
3184 *last_frag = frag;
3185 *last_time = jiffies;
3186 return 0;
3187
3188 drop:
3189 return 1;
3190}
3191
3192#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3193
3194#include "iwl-spectrum.h"
3195
3196#define BEACON_TIME_MASK_LOW 0x00FFFFFF
3197#define BEACON_TIME_MASK_HIGH 0xFF000000
3198#define TIME_UNIT 1024
3199
3200/*
3201 * extended beacon time format
3202 * time in usec will be changed into a 32-bit value in 8:24 format
3203 * the high 1 byte is the beacon counts
3204 * the lower 3 bytes is the time in usec within one beacon interval
3205 */
3206
3207static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3208{
3209 u32 quot;
3210 u32 rem;
3211 u32 interval = beacon_interval * 1024;
3212
3213 if (!interval || !usec)
3214 return 0;
3215
3216 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3217 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3218
3219 return (quot << 24) + rem;
3220}
3221
3222/* base is usually what we get from ucode with each received frame,
3223 * the same as HW timer counter counting down
3224 */
3225
3226static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3227{
3228 u32 base_low = base & BEACON_TIME_MASK_LOW;
3229 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3230 u32 interval = beacon_interval * TIME_UNIT;
3231 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3232 (addon & BEACON_TIME_MASK_HIGH);
3233
3234 if (base_low > addon_low)
3235 res += base_low - addon_low;
3236 else if (base_low < addon_low) {
3237 res += interval + base_low - addon_low;
3238 res += (1 << 24);
3239 } else
3240 res += (1 << 24);
3241
3242 return cpu_to_le32(res);
3243}
3244
3245static int iwl_get_measurement(struct iwl_priv *priv,
3246 struct ieee80211_measurement_params *params,
3247 u8 type)
3248{
3249 struct iwl_spectrum_cmd spectrum;
3250 struct iwl_rx_packet *res;
3251 struct iwl_host_cmd cmd = {
3252 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3253 .data = (void *)&spectrum,
3254 .meta.flags = CMD_WANT_SKB,
3255 };
3256 u32 add_time = le64_to_cpu(params->start_time);
3257 int rc;
3258 int spectrum_resp_status;
3259 int duration = le16_to_cpu(params->duration);
3260
3261 if (iwl_is_associated(priv))
3262 add_time =
3263 iwl_usecs_to_beacons(
3264 le64_to_cpu(params->start_time) - priv->last_tsf,
3265 le16_to_cpu(priv->rxon_timing.beacon_interval));
3266
3267 memset(&spectrum, 0, sizeof(spectrum));
3268
3269 spectrum.channel_count = cpu_to_le16(1);
3270 spectrum.flags =
3271 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3272 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3273 cmd.len = sizeof(spectrum);
3274 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3275
3276 if (iwl_is_associated(priv))
3277 spectrum.start_time =
3278 iwl_add_beacon_time(priv->last_beacon_time,
3279 add_time,
3280 le16_to_cpu(priv->rxon_timing.beacon_interval));
3281 else
3282 spectrum.start_time = 0;
3283
3284 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3285 spectrum.channels[0].channel = params->channel;
3286 spectrum.channels[0].type = type;
3287 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3288 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3289 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3290
3291 rc = iwl_send_cmd_sync(priv, &cmd);
3292 if (rc)
3293 return rc;
3294
3295 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3296 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3297 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3298 rc = -EIO;
3299 }
3300
3301 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3302 switch (spectrum_resp_status) {
3303 case 0: /* Command will be handled */
3304 if (res->u.spectrum.id != 0xff) {
3305 IWL_DEBUG_INFO
3306 ("Replaced existing measurement: %d\n",
3307 res->u.spectrum.id);
3308 priv->measurement_status &= ~MEASUREMENT_READY;
3309 }
3310 priv->measurement_status |= MEASUREMENT_ACTIVE;
3311 rc = 0;
3312 break;
3313
3314 case 1: /* Command will not be handled */
3315 rc = -EAGAIN;
3316 break;
3317 }
3318
3319 dev_kfree_skb_any(cmd.meta.u.skb);
3320
3321 return rc;
3322}
3323#endif
3324
3325static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3326 struct iwl_tx_info *tx_sta)
3327{
3328
3329 tx_sta->status.ack_signal = 0;
3330 tx_sta->status.excessive_retries = 0;
3331 tx_sta->status.queue_length = 0;
3332 tx_sta->status.queue_number = 0;
3333
3334 if (in_interrupt())
3335 ieee80211_tx_status_irqsafe(priv->hw,
3336 tx_sta->skb[0], &(tx_sta->status));
3337 else
3338 ieee80211_tx_status(priv->hw,
3339 tx_sta->skb[0], &(tx_sta->status));
3340
3341 tx_sta->skb[0] = NULL;
3342}
3343
3344/**
3345 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3346 *
3347 * When FW advances 'R' index, all entries between old and
3348 * new 'R' index need to be reclaimed. As result, some free space
3349 * forms. If there is enough free space (> low mark), wake Tx queue.
3350 */
3351int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3352{
3353 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3354 struct iwl_queue *q = &txq->q;
3355 int nfreed = 0;
3356
3357 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3358 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3359 "is out of range [0-%d] %d %d.\n", txq_id,
3360 index, q->n_bd, q->first_empty, q->last_used);
3361 return 0;
3362 }
3363
3364 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3365 q->last_used != index;
3366 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3367 if (txq_id != IWL_CMD_QUEUE_NUM) {
3368 iwl_txstatus_to_ieee(priv,
3369 &(txq->txb[txq->q.last_used]));
3370 iwl_hw_txq_free_tfd(priv, txq);
3371 } else if (nfreed > 1) {
3372 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3373 q->first_empty, q->last_used);
3374 queue_work(priv->workqueue, &priv->restart);
3375 }
3376 nfreed++;
3377 }
3378
3379 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3380 (txq_id != IWL_CMD_QUEUE_NUM) &&
3381 priv->mac80211_registered)
3382 ieee80211_wake_queue(priv->hw, txq_id);
3383
3384
3385 return nfreed;
3386}
3387
3388static int iwl_is_tx_success(u32 status)
3389{
3390 return (status & 0xFF) == 0x1;
3391}
3392
3393/******************************************************************************
3394 *
3395 * Generic RX handler implementations
3396 *
3397 ******************************************************************************/
3398static void iwl_rx_reply_tx(struct iwl_priv *priv,
3399 struct iwl_rx_mem_buffer *rxb)
3400{
3401 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3402 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3403 int txq_id = SEQ_TO_QUEUE(sequence);
3404 int index = SEQ_TO_INDEX(sequence);
3405 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3406 struct ieee80211_tx_status *tx_status;
3407 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3408 u32 status = le32_to_cpu(tx_resp->status);
3409
3410 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3411 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3412 "is out of range [0-%d] %d %d\n", txq_id,
3413 index, txq->q.n_bd, txq->q.first_empty,
3414 txq->q.last_used);
3415 return;
3416 }
3417
3418 tx_status = &(txq->txb[txq->q.last_used].status);
3419
3420 tx_status->retry_count = tx_resp->failure_frame;
3421 tx_status->queue_number = status;
3422 tx_status->queue_length = tx_resp->bt_kill_count;
3423 tx_status->queue_length |= tx_resp->failure_rts;
3424
3425 tx_status->flags =
3426 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3427
3428 tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3429
3430 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3431 txq_id, iwl_get_tx_fail_reason(status), status,
3432 tx_resp->rate, tx_resp->failure_frame);
3433
3434 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3435 if (index != -1)
3436 iwl_tx_queue_reclaim(priv, txq_id, index);
3437
3438 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3439 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3440}
3441
3442
3443static void iwl_rx_reply_alive(struct iwl_priv *priv,
3444 struct iwl_rx_mem_buffer *rxb)
3445{
3446 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3447 struct iwl_alive_resp *palive;
3448 struct delayed_work *pwork;
3449
3450 palive = &pkt->u.alive_frame;
3451
3452 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3453 "0x%01X 0x%01X\n",
3454 palive->is_valid, palive->ver_type,
3455 palive->ver_subtype);
3456
3457 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3458 IWL_DEBUG_INFO("Initialization Alive received.\n");
3459 memcpy(&priv->card_alive_init,
3460 &pkt->u.alive_frame,
3461 sizeof(struct iwl_init_alive_resp));
3462 pwork = &priv->init_alive_start;
3463 } else {
3464 IWL_DEBUG_INFO("Runtime Alive received.\n");
3465 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3466 sizeof(struct iwl_alive_resp));
3467 pwork = &priv->alive_start;
3468 iwl_disable_events(priv);
3469 }
3470
3471 /* We delay the ALIVE response by 5ms to
3472 * give the HW RF Kill time to activate... */
3473 if (palive->is_valid == UCODE_VALID_OK)
3474 queue_delayed_work(priv->workqueue, pwork,
3475 msecs_to_jiffies(5));
3476 else
3477 IWL_WARNING("uCode did not respond OK.\n");
3478}
3479
3480static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3481 struct iwl_rx_mem_buffer *rxb)
3482{
3483 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3484
3485 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3486 return;
3487}
3488
3489static void iwl_rx_reply_error(struct iwl_priv *priv,
3490 struct iwl_rx_mem_buffer *rxb)
3491{
3492 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3493
3494 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3495 "seq 0x%04X ser 0x%08X\n",
3496 le32_to_cpu(pkt->u.err_resp.error_type),
3497 get_cmd_string(pkt->u.err_resp.cmd_id),
3498 pkt->u.err_resp.cmd_id,
3499 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3500 le32_to_cpu(pkt->u.err_resp.error_info));
3501}
3502
3503#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3504
3505static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3506{
3507 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3508 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3509 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3510 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3511 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3512 rxon->channel = csa->channel;
3513 priv->staging_rxon.channel = csa->channel;
3514}
3515
3516static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3517 struct iwl_rx_mem_buffer *rxb)
3518{
3519#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3520 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3521 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3522
3523 if (!report->state) {
3524 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3525 "Spectrum Measure Notification: Start\n");
3526 return;
3527 }
3528
3529 memcpy(&priv->measure_report, report, sizeof(*report));
3530 priv->measurement_status |= MEASUREMENT_READY;
3531#endif
3532}
3533
3534static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3535 struct iwl_rx_mem_buffer *rxb)
3536{
3537#ifdef CONFIG_IWLWIFI_DEBUG
3538 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3539 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3540 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3541 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3542#endif
3543}
3544
3545static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3546 struct iwl_rx_mem_buffer *rxb)
3547{
3548 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3549 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3550 "notification for %s:\n",
3551 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3552 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3553}
3554
3555static void iwl_bg_beacon_update(struct work_struct *work)
3556{
3557 struct iwl_priv *priv =
3558 container_of(work, struct iwl_priv, beacon_update);
3559 struct sk_buff *beacon;
3560
3561 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3562 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3563
3564 if (!beacon) {
3565 IWL_ERROR("update beacon failed\n");
3566 return;
3567 }
3568
3569 mutex_lock(&priv->mutex);
3570 /* new beacon skb is allocated every time; dispose previous.*/
3571 if (priv->ibss_beacon)
3572 dev_kfree_skb(priv->ibss_beacon);
3573
3574 priv->ibss_beacon = beacon;
3575 mutex_unlock(&priv->mutex);
3576
3577 iwl_send_beacon_cmd(priv);
3578}
3579
3580static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3581 struct iwl_rx_mem_buffer *rxb)
3582{
3583#ifdef CONFIG_IWLWIFI_DEBUG
3584 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3585 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3586 u8 rate = beacon->beacon_notify_hdr.rate;
3587
3588 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3589 "tsf %d %d rate %d\n",
3590 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3591 beacon->beacon_notify_hdr.failure_frame,
3592 le32_to_cpu(beacon->ibss_mgr_status),
3593 le32_to_cpu(beacon->high_tsf),
3594 le32_to_cpu(beacon->low_tsf), rate);
3595#endif
3596
3597 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3598 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3599 queue_work(priv->workqueue, &priv->beacon_update);
3600}
3601
3602/* Service response to REPLY_SCAN_CMD (0x80) */
3603static void iwl_rx_reply_scan(struct iwl_priv *priv,
3604 struct iwl_rx_mem_buffer *rxb)
3605{
3606#ifdef CONFIG_IWLWIFI_DEBUG
3607 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3608 struct iwl_scanreq_notification *notif =
3609 (struct iwl_scanreq_notification *)pkt->u.raw;
3610
3611 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3612#endif
3613}
3614
3615/* Service SCAN_START_NOTIFICATION (0x82) */
3616static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3617 struct iwl_rx_mem_buffer *rxb)
3618{
3619 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3620 struct iwl_scanstart_notification *notif =
3621 (struct iwl_scanstart_notification *)pkt->u.raw;
3622 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3623 IWL_DEBUG_SCAN("Scan start: "
3624 "%d [802.11%s] "
3625 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3626 notif->channel,
3627 notif->band ? "bg" : "a",
3628 notif->tsf_high,
3629 notif->tsf_low, notif->status, notif->beacon_timer);
3630}
3631
3632/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3633static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3634 struct iwl_rx_mem_buffer *rxb)
3635{
3636 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3637 struct iwl_scanresults_notification *notif =
3638 (struct iwl_scanresults_notification *)pkt->u.raw;
3639
3640 IWL_DEBUG_SCAN("Scan ch.res: "
3641 "%d [802.11%s] "
3642 "(TSF: 0x%08X:%08X) - %d "
3643 "elapsed=%lu usec (%dms since last)\n",
3644 notif->channel,
3645 notif->band ? "bg" : "a",
3646 le32_to_cpu(notif->tsf_high),
3647 le32_to_cpu(notif->tsf_low),
3648 le32_to_cpu(notif->statistics[0]),
3649 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3650 jiffies_to_msecs(elapsed_jiffies
3651 (priv->last_scan_jiffies, jiffies)));
3652
3653 priv->last_scan_jiffies = jiffies;
3654}
3655
3656/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3657static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3658 struct iwl_rx_mem_buffer *rxb)
3659{
3660 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3661 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3662
3663 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3664 scan_notif->scanned_channels,
3665 scan_notif->tsf_low,
3666 scan_notif->tsf_high, scan_notif->status);
3667
3668 /* The HW is no longer scanning */
3669 clear_bit(STATUS_SCAN_HW, &priv->status);
3670
3671 /* The scan completion notification came in, so kill that timer... */
3672 cancel_delayed_work(&priv->scan_check);
3673
3674 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3675 (priv->scan_bands == 2) ? "2.4" : "5.2",
3676 jiffies_to_msecs(elapsed_jiffies
3677 (priv->scan_pass_start, jiffies)));
3678
3679 /* Remove this scanned band from the list
3680 * of pending bands to scan */
3681 priv->scan_bands--;
3682
3683 /* If a request to abort was given, or the scan did not succeed
3684 * then we reset the scan state machine and terminate,
3685 * re-queuing another scan if one has been requested */
3686 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3687 IWL_DEBUG_INFO("Aborted scan completed.\n");
3688 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3689 } else {
3690 /* If there are more bands on this scan pass reschedule */
3691 if (priv->scan_bands > 0)
3692 goto reschedule;
3693 }
3694
3695 priv->last_scan_jiffies = jiffies;
3696 IWL_DEBUG_INFO("Setting scan to off\n");
3697
3698 clear_bit(STATUS_SCANNING, &priv->status);
3699
3700 IWL_DEBUG_INFO("Scan took %dms\n",
3701 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3702
3703 queue_work(priv->workqueue, &priv->scan_completed);
3704
3705 return;
3706
3707reschedule:
3708 priv->scan_pass_start = jiffies;
3709 queue_work(priv->workqueue, &priv->request_scan);
3710}
3711
3712/* Handle notification from uCode that card's power state is changing
3713 * due to software, hardware, or critical temperature RFKILL */
3714static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3715 struct iwl_rx_mem_buffer *rxb)
3716{
3717 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3718 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3719 unsigned long status = priv->status;
3720
3721 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3722 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3723 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3724
3725 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3726 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3727
3728 if (flags & HW_CARD_DISABLED)
3729 set_bit(STATUS_RF_KILL_HW, &priv->status);
3730 else
3731 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3732
3733
3734 if (flags & SW_CARD_DISABLED)
3735 set_bit(STATUS_RF_KILL_SW, &priv->status);
3736 else
3737 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3738
3739 iwl_scan_cancel(priv);
3740
3741 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3742 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3743 (test_bit(STATUS_RF_KILL_SW, &status) !=
3744 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3745 queue_work(priv->workqueue, &priv->rf_kill);
3746 else
3747 wake_up_interruptible(&priv->wait_command_queue);
3748}
3749
3750/**
3751 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3752 *
3753 * Setup the RX handlers for each of the reply types sent from the uCode
3754 * to the host.
3755 *
3756 * This function chains into the hardware specific files for them to setup
3757 * any hardware specific handlers as well.
3758 */
3759static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3760{
3761 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3762 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3763 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3764 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3765 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3766 iwl_rx_spectrum_measure_notif;
3767 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3768 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3769 iwl_rx_pm_debug_statistics_notif;
3770 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3771
3772 /* NOTE: iwl_rx_statistics is different based on whether
3773 * the build is for the 3945 or the 4965. See the
3774 * corresponding implementation in iwl-XXXX.c
3775 *
3776 * The same handler is used for both the REPLY to a
3777 * discrete statistics request from the host as well as
3778 * for the periodic statistics notification from the uCode
3779 */
3780 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3781 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3782
3783 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3784 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3785 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3786 iwl_rx_scan_results_notif;
3787 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3788 iwl_rx_scan_complete_notif;
3789 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3790 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3791
3792 /* Setup hardware specific Rx handlers */
3793 iwl_hw_rx_handler_setup(priv);
3794}
3795
3796/**
3797 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3798 * @rxb: Rx buffer to reclaim
3799 *
3800 * If an Rx buffer has an async callback associated with it the callback
3801 * will be executed. The attached skb (if present) will only be freed
3802 * if the callback returns 1
3803 */
3804static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3805 struct iwl_rx_mem_buffer *rxb)
3806{
3807 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3808 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3809 int txq_id = SEQ_TO_QUEUE(sequence);
3810 int index = SEQ_TO_INDEX(sequence);
3811 int huge = sequence & SEQ_HUGE_FRAME;
3812 int cmd_index;
3813 struct iwl_cmd *cmd;
3814
3815 /* If a Tx command is being handled and it isn't in the actual
3816 * command queue then there a command routing bug has been introduced
3817 * in the queue management code. */
3818 if (txq_id != IWL_CMD_QUEUE_NUM)
3819 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3820 txq_id, pkt->hdr.cmd);
3821 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3822
3823 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3824 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3825
3826 /* Input error checking is done when commands are added to queue. */
3827 if (cmd->meta.flags & CMD_WANT_SKB) {
3828 cmd->meta.source->u.skb = rxb->skb;
3829 rxb->skb = NULL;
3830 } else if (cmd->meta.u.callback &&
3831 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3832 rxb->skb = NULL;
3833
3834 iwl_tx_queue_reclaim(priv, txq_id, index);
3835
3836 if (!(cmd->meta.flags & CMD_ASYNC)) {
3837 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3838 wake_up_interruptible(&priv->wait_command_queue);
3839 }
3840}
3841
3842/************************** RX-FUNCTIONS ****************************/
3843/*
3844 * Rx theory of operation
3845 *
3846 * The host allocates 32 DMA target addresses and passes the host address
3847 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3848 * 0 to 31
3849 *
3850 * Rx Queue Indexes
3851 * The host/firmware share two index registers for managing the Rx buffers.
3852 *
3853 * The READ index maps to the first position that the firmware may be writing
3854 * to -- the driver can read up to (but not including) this position and get
3855 * good data.
3856 * The READ index is managed by the firmware once the card is enabled.
3857 *
3858 * The WRITE index maps to the last position the driver has read from -- the
3859 * position preceding WRITE is the last slot the firmware can place a packet.
3860 *
3861 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3862 * WRITE = READ.
3863 *
3864 * During initialization the host sets up the READ queue position to the first
3865 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3866 *
3867 * When the firmware places a packet in a buffer it will advance the READ index
3868 * and fire the RX interrupt. The driver can then query the READ index and
3869 * process as many packets as possible, moving the WRITE index forward as it
3870 * resets the Rx queue buffers with new memory.
3871 *
3872 * The management in the driver is as follows:
3873 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3874 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3875 * to replensish the iwl->rxq->rx_free.
3876 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3877 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3878 * 'processed' and 'read' driver indexes as well)
3879 * + A received packet is processed and handed to the kernel network stack,
3880 * detached from the iwl->rxq. The driver 'processed' index is updated.
3881 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3882 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3883 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3884 * were enough free buffers and RX_STALLED is set it is cleared.
3885 *
3886 *
3887 * Driver sequence:
3888 *
3889 * iwl_rx_queue_alloc() Allocates rx_free
3890 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
3891 * iwl_rx_queue_restock
3892 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
3893 * queue, updates firmware pointers, and updates
3894 * the WRITE index. If insufficient rx_free buffers
3895 * are available, schedules iwl_rx_replenish
3896 *
3897 * -- enable interrupts --
3898 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
3899 * READ INDEX, detaching the SKB from the pool.
3900 * Moves the packet buffer from queue to rx_used.
3901 * Calls iwl_rx_queue_restock to refill any empty
3902 * slots.
3903 * ...
3904 *
3905 */
3906
3907/**
3908 * iwl_rx_queue_space - Return number of free slots available in queue.
3909 */
3910static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3911{
3912 int s = q->read - q->write;
3913 if (s <= 0)
3914 s += RX_QUEUE_SIZE;
3915 /* keep some buffer to not confuse full and empty queue */
3916 s -= 2;
3917 if (s < 0)
3918 s = 0;
3919 return s;
3920}
3921
3922/**
3923 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3924 *
3925 * NOTE: This function has 3945 and 4965 specific code sections
3926 * but is declared in base due to the majority of the
3927 * implementation being the same (only a numeric constant is
3928 * different)
3929 *
3930 */
3931int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3932{
3933 u32 reg = 0;
3934 int rc = 0;
3935 unsigned long flags;
3936
3937 spin_lock_irqsave(&q->lock, flags);
3938
3939 if (q->need_update == 0)
3940 goto exit_unlock;
3941
3942 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3943 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3944
3945 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3946 iwl_set_bit(priv, CSR_GP_CNTRL,
3947 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3948 goto exit_unlock;
3949 }
3950
3951 rc = iwl_grab_restricted_access(priv);
3952 if (rc)
3953 goto exit_unlock;
3954
3955 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3956 q->write & ~0x7);
3957 iwl_release_restricted_access(priv);
3958 } else
3959 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3960
3961
3962 q->need_update = 0;
3963
3964 exit_unlock:
3965 spin_unlock_irqrestore(&q->lock, flags);
3966 return rc;
3967}
3968
3969/**
3970 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3971 *
3972 * NOTE: This function has 3945 and 4965 specific code paths in it.
3973 */
3974static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3975 dma_addr_t dma_addr)
3976{
3977 return cpu_to_le32((u32)dma_addr);
3978}
3979
3980/**
3981 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
3982 *
3983 * If there are slots in the RX queue that need to be restocked,
3984 * and we have free pre-allocated buffers, fill the ranks as much
3985 * as we can pulling from rx_free.
3986 *
3987 * This moves the 'write' index forward to catch up with 'processed', and
3988 * also updates the memory address in the firmware to reference the new
3989 * target buffer.
3990 */
3991int iwl_rx_queue_restock(struct iwl_priv *priv)
3992{
3993 struct iwl_rx_queue *rxq = &priv->rxq;
3994 struct list_head *element;
3995 struct iwl_rx_mem_buffer *rxb;
3996 unsigned long flags;
3997 int write, rc;
3998
3999 spin_lock_irqsave(&rxq->lock, flags);
4000 write = rxq->write & ~0x7;
4001 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4002 element = rxq->rx_free.next;
4003 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4004 list_del(element);
4005 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4006 rxq->queue[rxq->write] = rxb;
4007 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4008 rxq->free_count--;
4009 }
4010 spin_unlock_irqrestore(&rxq->lock, flags);
4011 /* If the pre-allocated buffer pool is dropping low, schedule to
4012 * refill it */
4013 if (rxq->free_count <= RX_LOW_WATERMARK)
4014 queue_work(priv->workqueue, &priv->rx_replenish);
4015
4016
4017 /* If we've added more space for the firmware to place data, tell it */
4018 if ((write != (rxq->write & ~0x7))
4019 || (abs(rxq->write - rxq->read) > 7)) {
4020 spin_lock_irqsave(&rxq->lock, flags);
4021 rxq->need_update = 1;
4022 spin_unlock_irqrestore(&rxq->lock, flags);
4023 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4024 if (rc)
4025 return rc;
4026 }
4027
4028 return 0;
4029}
4030
4031/**
4032 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4033 *
4034 * When moving to rx_free an SKB is allocated for the slot.
4035 *
4036 * Also restock the Rx queue via iwl_rx_queue_restock.
4037 * This is called as a scheduled work item (except for during intialization)
4038 */
4039void iwl_rx_replenish(void *data)
4040{
4041 struct iwl_priv *priv = data;
4042 struct iwl_rx_queue *rxq = &priv->rxq;
4043 struct list_head *element;
4044 struct iwl_rx_mem_buffer *rxb;
4045 unsigned long flags;
4046 spin_lock_irqsave(&rxq->lock, flags);
4047 while (!list_empty(&rxq->rx_used)) {
4048 element = rxq->rx_used.next;
4049 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4050 rxb->skb =
4051 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4052 if (!rxb->skb) {
4053 if (net_ratelimit())
4054 printk(KERN_CRIT DRV_NAME
4055 ": Can not allocate SKB buffers\n");
4056 /* We don't reschedule replenish work here -- we will
4057 * call the restock method and if it still needs
4058 * more buffers it will schedule replenish */
4059 break;
4060 }
4061 priv->alloc_rxb_skb++;
4062 list_del(element);
4063 rxb->dma_addr =
4064 pci_map_single(priv->pci_dev, rxb->skb->data,
4065 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4066 list_add_tail(&rxb->list, &rxq->rx_free);
4067 rxq->free_count++;
4068 }
4069 spin_unlock_irqrestore(&rxq->lock, flags);
4070
4071 spin_lock_irqsave(&priv->lock, flags);
4072 iwl_rx_queue_restock(priv);
4073 spin_unlock_irqrestore(&priv->lock, flags);
4074}
4075
4076/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4077 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4078 * This free routine walks the list of POOL entries and if SKB is set to
4079 * non NULL it is unmapped and freed
4080 */
4081void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4082{
4083 int i;
4084 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4085 if (rxq->pool[i].skb != NULL) {
4086 pci_unmap_single(priv->pci_dev,
4087 rxq->pool[i].dma_addr,
4088 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4089 dev_kfree_skb(rxq->pool[i].skb);
4090 }
4091 }
4092
4093 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4094 rxq->dma_addr);
4095 rxq->bd = NULL;
4096}
4097
4098int iwl_rx_queue_alloc(struct iwl_priv *priv)
4099{
4100 struct iwl_rx_queue *rxq = &priv->rxq;
4101 struct pci_dev *dev = priv->pci_dev;
4102 int i;
4103
4104 spin_lock_init(&rxq->lock);
4105 INIT_LIST_HEAD(&rxq->rx_free);
4106 INIT_LIST_HEAD(&rxq->rx_used);
4107 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4108 if (!rxq->bd)
4109 return -ENOMEM;
4110 /* Fill the rx_used queue with _all_ of the Rx buffers */
4111 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4112 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4113 /* Set us so that we have processed and used all buffers, but have
4114 * not restocked the Rx queue with fresh buffers */
4115 rxq->read = rxq->write = 0;
4116 rxq->free_count = 0;
4117 rxq->need_update = 0;
4118 return 0;
4119}
4120
4121void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4122{
4123 unsigned long flags;
4124 int i;
4125 spin_lock_irqsave(&rxq->lock, flags);
4126 INIT_LIST_HEAD(&rxq->rx_free);
4127 INIT_LIST_HEAD(&rxq->rx_used);
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 /* In the reset function, these buffers may have been allocated
4131 * to an SKB, so we need to unmap and free potential storage */
4132 if (rxq->pool[i].skb != NULL) {
4133 pci_unmap_single(priv->pci_dev,
4134 rxq->pool[i].dma_addr,
4135 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4136 priv->alloc_rxb_skb--;
4137 dev_kfree_skb(rxq->pool[i].skb);
4138 rxq->pool[i].skb = NULL;
4139 }
4140 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4141 }
4142
4143 /* Set us so that we have processed and used all buffers, but have
4144 * not restocked the Rx queue with fresh buffers */
4145 rxq->read = rxq->write = 0;
4146 rxq->free_count = 0;
4147 spin_unlock_irqrestore(&rxq->lock, flags);
4148}
4149
4150/* Convert linear signal-to-noise ratio into dB */
4151static u8 ratio2dB[100] = {
4152/* 0 1 2 3 4 5 6 7 8 9 */
4153 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4154 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4155 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4156 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4157 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4158 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4159 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4160 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4161 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4162 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4163};
4164
4165/* Calculates a relative dB value from a ratio of linear
4166 * (i.e. not dB) signal levels.
4167 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4168int iwl_calc_db_from_ratio(int sig_ratio)
4169{
4170 /* Anything above 1000:1 just report as 60 dB */
4171 if (sig_ratio > 1000)
4172 return 60;
4173
4174 /* Above 100:1, divide by 10 and use table,
4175 * add 20 dB to make up for divide by 10 */
4176 if (sig_ratio > 100)
4177 return (20 + (int)ratio2dB[sig_ratio/10]);
4178
4179 /* We shouldn't see this */
4180 if (sig_ratio < 1)
4181 return 0;
4182
4183 /* Use table for ratios 1:1 - 99:1 */
4184 return (int)ratio2dB[sig_ratio];
4185}
4186
4187#define PERFECT_RSSI (-20) /* dBm */
4188#define WORST_RSSI (-95) /* dBm */
4189#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4190
4191/* Calculate an indication of rx signal quality (a percentage, not dBm!).
4192 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4193 * about formulas used below. */
4194int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4195{
4196 int sig_qual;
4197 int degradation = PERFECT_RSSI - rssi_dbm;
4198
4199 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4200 * as indicator; formula is (signal dbm - noise dbm).
4201 * SNR at or above 40 is a great signal (100%).
4202 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4203 * Weakest usable signal is usually 10 - 15 dB SNR. */
4204 if (noise_dbm) {
4205 if (rssi_dbm - noise_dbm >= 40)
4206 return 100;
4207 else if (rssi_dbm < noise_dbm)
4208 return 0;
4209 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4210
4211 /* Else use just the signal level.
4212 * This formula is a least squares fit of data points collected and
4213 * compared with a reference system that had a percentage (%) display
4214 * for signal quality. */
4215 } else
4216 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4217 (15 * RSSI_RANGE + 62 * degradation)) /
4218 (RSSI_RANGE * RSSI_RANGE);
4219
4220 if (sig_qual > 100)
4221 sig_qual = 100;
4222 else if (sig_qual < 1)
4223 sig_qual = 0;
4224
4225 return sig_qual;
4226}
4227
4228/**
4229 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4230 *
4231 * Uses the priv->rx_handlers callback function array to invoke
4232 * the appropriate handlers, including command responses,
4233 * frame-received notifications, and other notifications.
4234 */
4235static void iwl_rx_handle(struct iwl_priv *priv)
4236{
4237 struct iwl_rx_mem_buffer *rxb;
4238 struct iwl_rx_packet *pkt;
4239 struct iwl_rx_queue *rxq = &priv->rxq;
4240 u32 r, i;
4241 int reclaim;
4242 unsigned long flags;
4243
4244 r = iwl_hw_get_rx_read(priv);
4245 i = rxq->read;
4246
4247 /* Rx interrupt, but nothing sent from uCode */
4248 if (i == r)
4249 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4250
4251 while (i != r) {
4252 rxb = rxq->queue[i];
4253
4254 /* If an RXB doesn't have a queue slot associated with it
4255 * then a bug has been introduced in the queue refilling
4256 * routines -- catch it here */
4257 BUG_ON(rxb == NULL);
4258
4259 rxq->queue[i] = NULL;
4260
4261 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4262 IWL_RX_BUF_SIZE,
4263 PCI_DMA_FROMDEVICE);
4264 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4265
4266 /* Reclaim a command buffer only if this packet is a response
4267 * to a (driver-originated) command.
4268 * If the packet (e.g. Rx frame) originated from uCode,
4269 * there is no command buffer to reclaim.
4270 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4271 * but apparently a few don't get set; catch them here. */
4272 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4273 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4274 (pkt->hdr.cmd != REPLY_TX);
4275
4276 /* Based on type of command response or notification,
4277 * handle those that need handling via function in
4278 * rx_handlers table. See iwl_setup_rx_handlers() */
4279 if (priv->rx_handlers[pkt->hdr.cmd]) {
4280 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4281 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4282 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4283 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4284 } else {
4285 /* No handling needed */
4286 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4287 "r %d i %d No handler needed for %s, 0x%02x\n",
4288 r, i, get_cmd_string(pkt->hdr.cmd),
4289 pkt->hdr.cmd);
4290 }
4291
4292 if (reclaim) {
4293 /* Invoke any callbacks, transfer the skb to caller,
4294 * and fire off the (possibly) blocking iwl_send_cmd()
4295 * as we reclaim the driver command queue */
4296 if (rxb && rxb->skb)
4297 iwl_tx_cmd_complete(priv, rxb);
4298 else
4299 IWL_WARNING("Claim null rxb?\n");
4300 }
4301
4302 /* For now we just don't re-use anything. We can tweak this
4303 * later to try and re-use notification packets and SKBs that
4304 * fail to Rx correctly */
4305 if (rxb->skb != NULL) {
4306 priv->alloc_rxb_skb--;
4307 dev_kfree_skb_any(rxb->skb);
4308 rxb->skb = NULL;
4309 }
4310
4311 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4312 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4313 spin_lock_irqsave(&rxq->lock, flags);
4314 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4315 spin_unlock_irqrestore(&rxq->lock, flags);
4316 i = (i + 1) & RX_QUEUE_MASK;
4317 }
4318
4319 /* Backtrack one entry */
4320 priv->rxq.read = i;
4321 iwl_rx_queue_restock(priv);
4322}
4323
4324int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4325 struct iwl_tx_queue *txq)
4326{
4327 u32 reg = 0;
4328 int rc = 0;
4329 int txq_id = txq->q.id;
4330
4331 if (txq->need_update == 0)
4332 return rc;
4333
4334 /* if we're trying to save power */
4335 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4336 /* wake up nic if it's powered down ...
4337 * uCode will wake up, and interrupt us again, so next
4338 * time we'll skip this part. */
4339 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4340
4341 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4342 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4343 iwl_set_bit(priv, CSR_GP_CNTRL,
4344 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4345 return rc;
4346 }
4347
4348 /* restore this queue's parameters in nic hardware. */
4349 rc = iwl_grab_restricted_access(priv);
4350 if (rc)
4351 return rc;
4352 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4353 txq->q.first_empty | (txq_id << 8));
4354 iwl_release_restricted_access(priv);
4355
4356 /* else not in power-save mode, uCode will never sleep when we're
4357 * trying to tx (during RFKILL, we're not trying to tx). */
4358 } else
4359 iwl_write32(priv, HBUS_TARG_WRPTR,
4360 txq->q.first_empty | (txq_id << 8));
4361
4362 txq->need_update = 0;
4363
4364 return rc;
4365}
4366
4367#ifdef CONFIG_IWLWIFI_DEBUG
4368static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4369{
0795af57
JP		 4370 DECLARE_MAC_BUF(mac);
4371
b481de9c
ZY		 4372 IWL_DEBUG_RADIO("RX CONFIG:\n");
4373 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4374 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4375 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4376 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4377 le32_to_cpu(rxon->filter_flags));
4378 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4379 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4380 rxon->ofdm_basic_rates);
4381 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
0795af57
JP		 4382 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4383 print_mac(mac, rxon->node_addr));
4384 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4385 print_mac(mac, rxon->bssid_addr));
b481de9c
ZY		 4386 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4387}
4388#endif
4389
4390static void iwl_enable_interrupts(struct iwl_priv *priv)
4391{
4392 IWL_DEBUG_ISR("Enabling interrupts\n");
4393 set_bit(STATUS_INT_ENABLED, &priv->status);
4394 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4395}
4396
4397static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4398{
4399 clear_bit(STATUS_INT_ENABLED, &priv->status);
4400
4401 /* disable interrupts from uCode/NIC to host */
4402 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4403
4404 /* acknowledge/clear/reset any interrupts still pending
4405 * from uCode or flow handler (Rx/Tx DMA) */
4406 iwl_write32(priv, CSR_INT, 0xffffffff);
4407 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4408 IWL_DEBUG_ISR("Disabled interrupts\n");
4409}
4410
4411static const char *desc_lookup(int i)
4412{
4413 switch (i) {
4414 case 1:
4415 return "FAIL";
4416 case 2:
4417 return "BAD_PARAM";
4418 case 3:
4419 return "BAD_CHECKSUM";
4420 case 4:
4421 return "NMI_INTERRUPT";
4422 case 5:
4423 return "SYSASSERT";
4424 case 6:
4425 return "FATAL_ERROR";
4426 }
4427
4428 return "UNKNOWN";
4429}
4430
4431#define ERROR_START_OFFSET (1 * sizeof(u32))
4432#define ERROR_ELEM_SIZE (7 * sizeof(u32))
4433
4434static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4435{
4436 u32 i;
4437 u32 desc, time, count, base, data1;
4438 u32 blink1, blink2, ilink1, ilink2;
4439 int rc;
4440
4441 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4442
4443 if (!iwl_hw_valid_rtc_data_addr(base)) {
4444 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4445 return;
4446 }
4447
4448 rc = iwl_grab_restricted_access(priv);
4449 if (rc) {
4450 IWL_WARNING("Can not read from adapter at this time.\n");
4451 return;
4452 }
4453
4454 count = iwl_read_restricted_mem(priv, base);
4455
4456 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4457 IWL_ERROR("Start IWL Error Log Dump:\n");
4458 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4459 priv->status, priv->config, count);
4460 }
4461
4462 IWL_ERROR("Desc Time asrtPC blink2 "
4463 "ilink1 nmiPC Line\n");
4464 for (i = ERROR_START_OFFSET;
4465 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4466 i += ERROR_ELEM_SIZE) {
4467 desc = iwl_read_restricted_mem(priv, base + i);
4468 time =
4469 iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4470 blink1 =
4471 iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4472 blink2 =
4473 iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4474 ilink1 =
4475 iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4476 ilink2 =
4477 iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4478 data1 =
4479 iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4480
4481 IWL_ERROR
4482 ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4483 desc_lookup(desc), desc, time, blink1, blink2,
4484 ilink1, ilink2, data1);
4485 }
4486
4487 iwl_release_restricted_access(priv);
4488
4489}
4490
4491#define EVENT_START_OFFSET (4 * sizeof(u32))
4492
4493/**
4494 * iwl_print_event_log - Dump error event log to syslog
4495 *
4496 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4497 */
4498static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4499 u32 num_events, u32 mode)
4500{
4501 u32 i;
4502 u32 base; /* SRAM byte address of event log header */
4503 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4504 u32 ptr; /* SRAM byte address of log data */
4505 u32 ev, time, data; /* event log data */
4506
4507 if (num_events == 0)
4508 return;
4509
4510 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4511
4512 if (mode == 0)
4513 event_size = 2 * sizeof(u32);
4514 else
4515 event_size = 3 * sizeof(u32);
4516
4517 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4518
4519 /* "time" is actually "data" for mode 0 (no timestamp).
4520 * place event id # at far right for easier visual parsing. */
4521 for (i = 0; i < num_events; i++) {
4522 ev = iwl_read_restricted_mem(priv, ptr);
4523 ptr += sizeof(u32);
4524 time = iwl_read_restricted_mem(priv, ptr);
4525 ptr += sizeof(u32);
4526 if (mode == 0)
4527 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4528 else {
4529 data = iwl_read_restricted_mem(priv, ptr);
4530 ptr += sizeof(u32);
4531 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4532 }
4533 }
4534}
4535
4536static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4537{
4538 int rc;
4539 u32 base; /* SRAM byte address of event log header */
4540 u32 capacity; /* event log capacity in # entries */
4541 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4542 u32 num_wraps; /* # times uCode wrapped to top of log */
4543 u32 next_entry; /* index of next entry to be written by uCode */
4544 u32 size; /* # entries that we'll print */
4545
4546 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4547 if (!iwl_hw_valid_rtc_data_addr(base)) {
4548 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4549 return;
4550 }
4551
4552 rc = iwl_grab_restricted_access(priv);
4553 if (rc) {
4554 IWL_WARNING("Can not read from adapter at this time.\n");
4555 return;
4556 }
4557
4558 /* event log header */
4559 capacity = iwl_read_restricted_mem(priv, base);
4560 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4561 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4562 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4563
4564 size = num_wraps ? capacity : next_entry;
4565
4566 /* bail out if nothing in log */
4567 if (size == 0) {
583fab37 4568 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
b481de9c
ZY		 4569 iwl_release_restricted_access(priv);
4570 return;
4571 }
4572
583fab37 4573 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
b481de9c
ZY		 4574 size, num_wraps);
4575
4576 /* if uCode has wrapped back to top of log, start at the oldest entry,
4577 * i.e the next one that uCode would fill. */
4578 if (num_wraps)
4579 iwl_print_event_log(priv, next_entry,
4580 capacity - next_entry, mode);
4581
4582 /* (then/else) start at top of log */
4583 iwl_print_event_log(priv, 0, next_entry, mode);
4584
4585 iwl_release_restricted_access(priv);
4586}
4587
4588/**
4589 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4590 */
4591static void iwl_irq_handle_error(struct iwl_priv *priv)
4592{
4593 /* Set the FW error flag -- cleared on iwl_down */
4594 set_bit(STATUS_FW_ERROR, &priv->status);
4595
4596 /* Cancel currently queued command. */
4597 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4598
4599#ifdef CONFIG_IWLWIFI_DEBUG
4600 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4601 iwl_dump_nic_error_log(priv);
4602 iwl_dump_nic_event_log(priv);
4603 iwl_print_rx_config_cmd(&priv->staging_rxon);
4604 }
4605#endif
4606
4607 wake_up_interruptible(&priv->wait_command_queue);
4608
4609 /* Keep the restart process from trying to send host
4610 * commands by clearing the INIT status bit */
4611 clear_bit(STATUS_READY, &priv->status);
4612
4613 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4614 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4615 "Restarting adapter due to uCode error.\n");
4616
4617 if (iwl_is_associated(priv)) {
4618 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4619 sizeof(priv->recovery_rxon));
4620 priv->error_recovering = 1;
4621 }
4622 queue_work(priv->workqueue, &priv->restart);
4623 }
4624}
4625
4626static void iwl_error_recovery(struct iwl_priv *priv)
4627{
4628 unsigned long flags;
4629
4630 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4631 sizeof(priv->staging_rxon));
4632 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4633 iwl_commit_rxon(priv);
4634
556f8db7 4635 iwl_add_station(priv, priv->bssid, 1, 0);
b481de9c
ZY		 4636
4637 spin_lock_irqsave(&priv->lock, flags);
4638 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4639 priv->error_recovering = 0;
4640 spin_unlock_irqrestore(&priv->lock, flags);
4641}
4642
4643static void iwl_irq_tasklet(struct iwl_priv *priv)
4644{
4645 u32 inta, handled = 0;
4646 u32 inta_fh;
4647 unsigned long flags;
4648#ifdef CONFIG_IWLWIFI_DEBUG
4649 u32 inta_mask;
4650#endif
4651
4652 spin_lock_irqsave(&priv->lock, flags);
4653
4654 /* Ack/clear/reset pending uCode interrupts.
4655 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4656 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4657 inta = iwl_read32(priv, CSR_INT);
4658 iwl_write32(priv, CSR_INT, inta);
4659
4660 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4661 * Any new interrupts that happen after this, either while we're
4662 * in this tasklet, or later, will show up in next ISR/tasklet. */
4663 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4664 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4665
4666#ifdef CONFIG_IWLWIFI_DEBUG
4667 if (iwl_debug_level & IWL_DL_ISR) {
4668 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4669 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4670 inta, inta_mask, inta_fh);
4671 }
4672#endif
4673
4674 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4675 * atomic, make sure that inta covers all the interrupts that
4676 * we've discovered, even if FH interrupt came in just after
4677 * reading CSR_INT. */
4678 if (inta_fh & CSR_FH_INT_RX_MASK)
4679 inta |= CSR_INT_BIT_FH_RX;
4680 if (inta_fh & CSR_FH_INT_TX_MASK)
4681 inta |= CSR_INT_BIT_FH_TX;
4682
4683 /* Now service all interrupt bits discovered above. */
4684 if (inta & CSR_INT_BIT_HW_ERR) {
4685 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4686
4687 /* Tell the device to stop sending interrupts */
4688 iwl_disable_interrupts(priv);
4689
4690 iwl_irq_handle_error(priv);
4691
4692 handled |= CSR_INT_BIT_HW_ERR;
4693
4694 spin_unlock_irqrestore(&priv->lock, flags);
4695
4696 return;
4697 }
4698
4699#ifdef CONFIG_IWLWIFI_DEBUG
4700 if (iwl_debug_level & (IWL_DL_ISR)) {
4701 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4702 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4703 IWL_DEBUG_ISR("Microcode started or stopped.\n");
4704
4705 /* Alive notification via Rx interrupt will do the real work */
4706 if (inta & CSR_INT_BIT_ALIVE)
4707 IWL_DEBUG_ISR("Alive interrupt\n");
4708 }
4709#endif
4710 /* Safely ignore these bits for debug checks below */
4711 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4712
4713 /* HW RF KILL switch toggled (4965 only) */
4714 if (inta & CSR_INT_BIT_RF_KILL) {
4715 int hw_rf_kill = 0;
4716 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4717 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4718 hw_rf_kill = 1;
4719
4720 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4721 "RF_KILL bit toggled to %s.\n",
4722 hw_rf_kill ? "disable radio":"enable radio");
4723
4724 /* Queue restart only if RF_KILL switch was set to "kill"
4725 * when we loaded driver, and is now set to "enable".
4726 * After we're Alive, RF_KILL gets handled by
4727 * iwl_rx_card_state_notif() */
4728 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4729 queue_work(priv->workqueue, &priv->restart);
4730
4731 handled |= CSR_INT_BIT_RF_KILL;
4732 }
4733
4734 /* Chip got too hot and stopped itself (4965 only) */
4735 if (inta & CSR_INT_BIT_CT_KILL) {
4736 IWL_ERROR("Microcode CT kill error detected.\n");
4737 handled |= CSR_INT_BIT_CT_KILL;
4738 }
4739
4740 /* Error detected by uCode */
4741 if (inta & CSR_INT_BIT_SW_ERR) {
4742 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4743 inta);
4744 iwl_irq_handle_error(priv);
4745 handled |= CSR_INT_BIT_SW_ERR;
4746 }
4747
4748 /* uCode wakes up after power-down sleep */
4749 if (inta & CSR_INT_BIT_WAKEUP) {
4750 IWL_DEBUG_ISR("Wakeup interrupt\n");
4751 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4752 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4753 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4754 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4755 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4756 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4757 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4758
4759 handled |= CSR_INT_BIT_WAKEUP;
4760 }
4761
4762 /* All uCode command responses, including Tx command responses,
4763 * Rx "responses" (frame-received notification), and other
4764 * notifications from uCode come through here*/
4765 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4766 iwl_rx_handle(priv);
4767 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4768 }
4769
4770 if (inta & CSR_INT_BIT_FH_TX) {
4771 IWL_DEBUG_ISR("Tx interrupt\n");
4772
4773 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4774 if (!iwl_grab_restricted_access(priv)) {
4775 iwl_write_restricted(priv,
4776 FH_TCSR_CREDIT
4777 (ALM_FH_SRVC_CHNL), 0x0);
4778 iwl_release_restricted_access(priv);
4779 }
4780 handled |= CSR_INT_BIT_FH_TX;
4781 }
4782
4783 if (inta & ~handled)
4784 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4785
4786 if (inta & ~CSR_INI_SET_MASK) {
4787 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4788 inta & ~CSR_INI_SET_MASK);
4789 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4790 }
4791
4792 /* Re-enable all interrupts */
4793 iwl_enable_interrupts(priv);
4794
4795#ifdef CONFIG_IWLWIFI_DEBUG
4796 if (iwl_debug_level & (IWL_DL_ISR)) {
4797 inta = iwl_read32(priv, CSR_INT);
4798 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4799 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4800 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4801 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4802 }
4803#endif
4804 spin_unlock_irqrestore(&priv->lock, flags);
4805}
4806
4807static irqreturn_t iwl_isr(int irq, void *data)
4808{
4809 struct iwl_priv *priv = data;
4810 u32 inta, inta_mask;
4811 u32 inta_fh;
4812 if (!priv)
4813 return IRQ_NONE;
4814
4815 spin_lock(&priv->lock);
4816
4817 /* Disable (but don't clear!) interrupts here to avoid
4818 * back-to-back ISRs and sporadic interrupts from our NIC.
4819 * If we have something to service, the tasklet will re-enable ints.
4820 * If we *don't* have something, we'll re-enable before leaving here. */
4821 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4822 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4823
4824 /* Discover which interrupts are active/pending */
4825 inta = iwl_read32(priv, CSR_INT);
4826 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4827
4828 /* Ignore interrupt if there's nothing in NIC to service.
4829 * This may be due to IRQ shared with another device,
4830 * or due to sporadic interrupts thrown from our NIC. */
4831 if (!inta && !inta_fh) {
4832 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4833 goto none;
4834 }
4835
4836 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4837 /* Hardware disappeared */
4838 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4839 goto none;
4840 }
4841
4842 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4843 inta, inta_mask, inta_fh);
4844
4845 /* iwl_irq_tasklet() will service interrupts and re-enable them */
4846 tasklet_schedule(&priv->irq_tasklet);
4847 spin_unlock(&priv->lock);
4848
4849 return IRQ_HANDLED;
4850
4851 none:
4852 /* re-enable interrupts here since we don't have anything to service. */
4853 iwl_enable_interrupts(priv);
4854 spin_unlock(&priv->lock);
4855 return IRQ_NONE;
4856}
4857
4858/************************** EEPROM BANDS ****************************
4859 *
4860 * The iwl_eeprom_band definitions below provide the mapping from the
4861 * EEPROM contents to the specific channel number supported for each
4862 * band.
4863 *
4864 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4865 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4866 * The specific geography and calibration information for that channel
4867 * is contained in the eeprom map itself.
4868 *
4869 * During init, we copy the eeprom information and channel map
4870 * information into priv->channel_info_24/52 and priv->channel_map_24/52
4871 *
4872 * channel_map_24/52 provides the index in the channel_info array for a
4873 * given channel. We have to have two separate maps as there is channel
4874 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4875 * band_2
4876 *
4877 * A value of 0xff stored in the channel_map indicates that the channel
4878 * is not supported by the hardware at all.
4879 *
4880 * A value of 0xfe in the channel_map indicates that the channel is not
4881 * valid for Tx with the current hardware. This means that
4882 * while the system can tune and receive on a given channel, it may not
4883 * be able to associate or transmit any frames on that
4884 * channel. There is no corresponding channel information for that
4885 * entry.
4886 *
4887 *********************************************************************/
4888
4889/* 2.4 GHz */
4890static const u8 iwl_eeprom_band_1[14] = {
4891 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4892};
4893
4894/* 5.2 GHz bands */
4895static const u8 iwl_eeprom_band_2[] = {
4896 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4897};
4898
4899static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4900 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4901};
4902
4903static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4904 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4905};
4906
4907static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4908 145, 149, 153, 157, 161, 165
4909};
4910
4911static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4912 int *eeprom_ch_count,
4913 const struct iwl_eeprom_channel
4914 **eeprom_ch_info,
4915 const u8 **eeprom_ch_index)
4916{
4917 switch (band) {
4918 case 1: /* 2.4GHz band */
4919 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4920 *eeprom_ch_info = priv->eeprom.band_1_channels;
4921 *eeprom_ch_index = iwl_eeprom_band_1;
4922 break;
4923 case 2: /* 5.2GHz band */
4924 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4925 *eeprom_ch_info = priv->eeprom.band_2_channels;
4926 *eeprom_ch_index = iwl_eeprom_band_2;
4927 break;
4928 case 3: /* 5.2GHz band */
4929 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4930 *eeprom_ch_info = priv->eeprom.band_3_channels;
4931 *eeprom_ch_index = iwl_eeprom_band_3;
4932 break;
4933 case 4: /* 5.2GHz band */
4934 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4935 *eeprom_ch_info = priv->eeprom.band_4_channels;
4936 *eeprom_ch_index = iwl_eeprom_band_4;
4937 break;
4938 case 5: /* 5.2GHz band */
4939 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4940 *eeprom_ch_info = priv->eeprom.band_5_channels;
4941 *eeprom_ch_index = iwl_eeprom_band_5;
4942 break;
4943 default:
4944 BUG();
4945 return;
4946 }
4947}
4948
4949const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4950 int phymode, u16 channel)
4951{
4952 int i;
4953
4954 switch (phymode) {
4955 case MODE_IEEE80211A:
4956 for (i = 14; i < priv->channel_count; i++) {
4957 if (priv->channel_info[i].channel == channel)
4958 return &priv->channel_info[i];
4959 }
4960 break;
4961
4962 case MODE_IEEE80211B:
4963 case MODE_IEEE80211G:
4964 if (channel >= 1 && channel <= 14)
4965 return &priv->channel_info[channel - 1];
4966 break;
4967
4968 }
4969
4970 return NULL;
4971}
4972
4973#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4974 ? # x " " : "")
4975
4976static int iwl_init_channel_map(struct iwl_priv *priv)
4977{
4978 int eeprom_ch_count = 0;
4979 const u8 *eeprom_ch_index = NULL;
4980 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4981 int band, ch;
4982 struct iwl_channel_info *ch_info;
4983
4984 if (priv->channel_count) {
4985 IWL_DEBUG_INFO("Channel map already initialized.\n");
4986 return 0;
4987 }
4988
4989 if (priv->eeprom.version < 0x2f) {
4990 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4991 priv->eeprom.version);
4992 return -EINVAL;
4993 }
4994
4995 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4996
4997 priv->channel_count =
4998 ARRAY_SIZE(iwl_eeprom_band_1) +
4999 ARRAY_SIZE(iwl_eeprom_band_2) +
5000 ARRAY_SIZE(iwl_eeprom_band_3) +
5001 ARRAY_SIZE(iwl_eeprom_band_4) +
5002 ARRAY_SIZE(iwl_eeprom_band_5);
5003
5004 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5005
5006 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5007 priv->channel_count, GFP_KERNEL);
5008 if (!priv->channel_info) {
5009 IWL_ERROR("Could not allocate channel_info\n");
5010 priv->channel_count = 0;
5011 return -ENOMEM;
5012 }
5013
5014 ch_info = priv->channel_info;
5015
5016 /* Loop through the 5 EEPROM bands adding them in order to the
5017 * channel map we maintain (that contains additional information than
5018 * what just in the EEPROM) */
5019 for (band = 1; band <= 5; band++) {
5020
5021 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5022 &eeprom_ch_info, &eeprom_ch_index);
5023
5024 /* Loop through each band adding each of the channels */
5025 for (ch = 0; ch < eeprom_ch_count; ch++) {
5026 ch_info->channel = eeprom_ch_index[ch];
5027 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5028 MODE_IEEE80211A;
5029
5030 /* permanently store EEPROM's channel regulatory flags
5031 * and max power in channel info database. */
5032 ch_info->eeprom = eeprom_ch_info[ch];
5033
5034 /* Copy the run-time flags so they are there even on
5035 * invalid channels */
5036 ch_info->flags = eeprom_ch_info[ch].flags;
5037
5038 if (!(is_channel_valid(ch_info))) {
5039 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5040 "No traffic\n",
5041 ch_info->channel,
5042 ch_info->flags,
5043 is_channel_a_band(ch_info) ?
5044 "5.2" : "2.4");
5045 ch_info++;
5046 continue;
5047 }
5048
5049 /* Initialize regulatory-based run-time data */
5050 ch_info->max_power_avg = ch_info->curr_txpow =
5051 eeprom_ch_info[ch].max_power_avg;
5052 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5053 ch_info->min_power = 0;
5054
5055 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5056 " %ddBm): Ad-Hoc %ssupported\n",
5057 ch_info->channel,
5058 is_channel_a_band(ch_info) ?
5059 "5.2" : "2.4",
5060 CHECK_AND_PRINT(IBSS),
5061 CHECK_AND_PRINT(ACTIVE),
5062 CHECK_AND_PRINT(RADAR),
5063 CHECK_AND_PRINT(WIDE),
5064 CHECK_AND_PRINT(NARROW),
5065 CHECK_AND_PRINT(DFS),
5066 eeprom_ch_info[ch].flags,
5067 eeprom_ch_info[ch].max_power_avg,
5068 ((eeprom_ch_info[ch].
5069 flags & EEPROM_CHANNEL_IBSS)
5070 && !(eeprom_ch_info[ch].
5071 flags & EEPROM_CHANNEL_RADAR))
5072 ? "" : "not ");
5073
5074 /* Set the user_txpower_limit to the highest power
5075 * supported by any channel */
5076 if (eeprom_ch_info[ch].max_power_avg >
5077 priv->user_txpower_limit)
5078 priv->user_txpower_limit =
5079 eeprom_ch_info[ch].max_power_avg;
5080
5081 ch_info++;
5082 }
5083 }
5084
5085 if (iwl3945_txpower_set_from_eeprom(priv))
5086 return -EIO;
5087
5088 return 0;
5089}
5090
5091/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5092 * sending probe req. This should be set long enough to hear probe responses
5093 * from more than one AP. */
5094#define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5095#define IWL_ACTIVE_DWELL_TIME_52 (10)
5096
5097/* For faster active scanning, scan will move to the next channel if fewer than
5098 * PLCP_QUIET_THRESH packets are heard on this channel within
5099 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5100 * time if it's a quiet channel (nothing responded to our probe, and there's
5101 * no other traffic).
5102 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5103#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5104#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5105
5106/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5107 * Must be set longer than active dwell time.
5108 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5109#define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5110#define IWL_PASSIVE_DWELL_TIME_52 (10)
5111#define IWL_PASSIVE_DWELL_BASE (100)
5112#define IWL_CHANNEL_TUNE_TIME 5
5113
5114static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5115{
5116 if (phymode == MODE_IEEE80211A)
5117 return IWL_ACTIVE_DWELL_TIME_52;
5118 else
5119 return IWL_ACTIVE_DWELL_TIME_24;
5120}
5121
5122static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5123{
5124 u16 active = iwl_get_active_dwell_time(priv, phymode);
5125 u16 passive = (phymode != MODE_IEEE80211A) ?
5126 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5127 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5128
5129 if (iwl_is_associated(priv)) {
5130 /* If we're associated, we clamp the maximum passive
5131 * dwell time to be 98% of the beacon interval (minus
5132 * 2 * channel tune time) */
5133 passive = priv->beacon_int;
5134 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5135 passive = IWL_PASSIVE_DWELL_BASE;
5136 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5137 }
5138
5139 if (passive <= active)
5140 passive = active + 1;
5141
5142 return passive;
5143}
5144
5145static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5146 u8 is_active, u8 direct_mask,
5147 struct iwl_scan_channel *scan_ch)
5148{
5149 const struct ieee80211_channel *channels = NULL;
5150 const struct ieee80211_hw_mode *hw_mode;
5151 const struct iwl_channel_info *ch_info;
5152 u16 passive_dwell = 0;
5153 u16 active_dwell = 0;
5154 int added, i;
5155
5156 hw_mode = iwl_get_hw_mode(priv, phymode);
5157 if (!hw_mode)
5158 return 0;
5159
5160 channels = hw_mode->channels;
5161
5162 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5163 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5164
5165 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5166 if (channels[i].chan ==
5167 le16_to_cpu(priv->active_rxon.channel)) {
5168 if (iwl_is_associated(priv)) {
5169 IWL_DEBUG_SCAN
5170 ("Skipping current channel %d\n",
5171 le16_to_cpu(priv->active_rxon.channel));
5172 continue;
5173 }
5174 } else if (priv->only_active_channel)
5175 continue;
5176
5177 scan_ch->channel = channels[i].chan;
5178
5179 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5180 if (!is_channel_valid(ch_info)) {
5181 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5182 scan_ch->channel);
5183 continue;
5184 }
5185
5186 if (!is_active || is_channel_passive(ch_info) ||
5187 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5188 scan_ch->type = 0; /* passive */
5189 else
5190 scan_ch->type = 1; /* active */
5191
5192 if (scan_ch->type & 1)
5193 scan_ch->type |= (direct_mask << 1);
5194
5195 if (is_channel_narrow(ch_info))
5196 scan_ch->type |= (1 << 7);
5197
5198 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5199 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5200
5201 /* Set power levels to defaults */
5202 scan_ch->tpc.dsp_atten = 110;
5203 /* scan_pwr_info->tpc.dsp_atten; */
5204
5205 /*scan_pwr_info->tpc.tx_gain; */
5206 if (phymode == MODE_IEEE80211A)
5207 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5208 else {
5209 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5210 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5211 * power level
5212 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5213 */
5214 }
5215
5216 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5217 scan_ch->channel,
5218 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5219 (scan_ch->type & 1) ?
5220 active_dwell : passive_dwell);
5221
5222 scan_ch++;
5223 added++;
5224 }
5225
5226 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5227 return added;
5228}
5229
5230static void iwl_reset_channel_flag(struct iwl_priv *priv)
5231{
5232 int i, j;
5233 for (i = 0; i < 3; i++) {
5234 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5235 for (j = 0; j < hw_mode->num_channels; j++)
5236 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5237 }
5238}
5239
5240static void iwl_init_hw_rates(struct iwl_priv *priv,
5241 struct ieee80211_rate *rates)
5242{
5243 int i;
5244
5245 for (i = 0; i < IWL_RATE_COUNT; i++) {
5246 rates[i].rate = iwl_rates[i].ieee * 5;
5247 rates[i].val = i; /* Rate scaling will work on indexes */
5248 rates[i].val2 = i;
5249 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5250 /* Only OFDM have the bits-per-symbol set */
5251 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5252 rates[i].flags |= IEEE80211_RATE_OFDM;
5253 else {
5254 /*
5255 * If CCK 1M then set rate flag to CCK else CCK_2
5256 * which is CCK | PREAMBLE2
5257 */
5258 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5259 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5260 }
5261
5262 /* Set up which ones are basic rates... */
5263 if (IWL_BASIC_RATES_MASK & (1 << i))
5264 rates[i].flags |= IEEE80211_RATE_BASIC;
5265 }
5266}
5267
5268/**
5269 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5270 */
5271static int iwl_init_geos(struct iwl_priv *priv)
5272{
5273 struct iwl_channel_info *ch;
5274 struct ieee80211_hw_mode *modes;
5275 struct ieee80211_channel *channels;
5276 struct ieee80211_channel *geo_ch;
5277 struct ieee80211_rate *rates;
5278 int i = 0;
5279 enum {
5280 A = 0,
5281 B = 1,
5282 G = 2,
5283 };
5284 int mode_count = 3;
5285
5286 if (priv->modes) {
5287 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5288 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5289 return 0;
5290 }
5291
5292 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5293 GFP_KERNEL);
5294 if (!modes)
5295 return -ENOMEM;
5296
5297 channels = kzalloc(sizeof(struct ieee80211_channel) *
5298 priv->channel_count, GFP_KERNEL);
5299 if (!channels) {
5300 kfree(modes);
5301 return -ENOMEM;
5302 }
5303
5304 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5305 GFP_KERNEL);
5306 if (!rates) {
5307 kfree(modes);
5308 kfree(channels);
5309 return -ENOMEM;
5310 }
5311
5312 /* 0 = 802.11a
5313 * 1 = 802.11b
5314 * 2 = 802.11g
5315 */
5316
5317 /* 5.2GHz channels start after the 2.4GHz channels */
5318 modes[A].mode = MODE_IEEE80211A;
5319 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5320 modes[A].rates = rates;
5321 modes[A].num_rates = 8; /* just OFDM */
5322 modes[A].num_channels = 0;
5323
5324 modes[B].mode = MODE_IEEE80211B;
5325 modes[B].channels = channels;
5326 modes[B].rates = &rates[8];
5327 modes[B].num_rates = 4; /* just CCK */
5328 modes[B].num_channels = 0;
5329
5330 modes[G].mode = MODE_IEEE80211G;
5331 modes[G].channels = channels;
5332 modes[G].rates = rates;
5333 modes[G].num_rates = 12; /* OFDM & CCK */
5334 modes[G].num_channels = 0;
5335
5336 priv->ieee_channels = channels;
5337 priv->ieee_rates = rates;
5338
5339 iwl_init_hw_rates(priv, rates);
5340
5341 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5342 ch = &priv->channel_info[i];
5343
5344 if (!is_channel_valid(ch)) {
5345 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5346 "skipping.\n",
5347 ch->channel, is_channel_a_band(ch) ?
5348 "5.2" : "2.4");
5349 continue;
5350 }
5351
5352 if (is_channel_a_band(ch))
5353 geo_ch = &modes[A].channels[modes[A].num_channels++];
5354 else {
5355 geo_ch = &modes[B].channels[modes[B].num_channels++];
5356 modes[G].num_channels++;
5357 }
5358
5359 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5360 geo_ch->chan = ch->channel;
5361 geo_ch->power_level = ch->max_power_avg;
5362 geo_ch->antenna_max = 0xff;
5363
5364 if (is_channel_valid(ch)) {
5365 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5366 if (ch->flags & EEPROM_CHANNEL_IBSS)
5367 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5368
5369 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5370 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5371
5372 if (ch->flags & EEPROM_CHANNEL_RADAR)
5373 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5374
5375 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5376 priv->max_channel_txpower_limit =
5377 ch->max_power_avg;
5378 }
5379
5380 geo_ch->val = geo_ch->flag;
5381 }
5382
5383 if ((modes[A].num_channels == 0) && priv->is_abg) {
5384 printk(KERN_INFO DRV_NAME
5385 ": Incorrectly detected BG card as ABG. Please send "
5386 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5387 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5388 priv->is_abg = 0;
5389 }
5390
5391 printk(KERN_INFO DRV_NAME
5392 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5393 modes[G].num_channels, modes[A].num_channels);
5394
5395 /*
5396 * NOTE: We register these in preference of order -- the
5397 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5398 * a phymode based on rates or AP capabilities but seems to
5399 * configure it purely on if the channel being configured
5400 * is supported by a mode -- and the first match is taken
5401 */
5402
5403 if (modes[G].num_channels)
5404 ieee80211_register_hwmode(priv->hw, &modes[G]);
5405 if (modes[B].num_channels)
5406 ieee80211_register_hwmode(priv->hw, &modes[B]);
5407 if (modes[A].num_channels)
5408 ieee80211_register_hwmode(priv->hw, &modes[A]);
5409
5410 priv->modes = modes;
5411 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5412
5413 return 0;
5414}
5415
5416/******************************************************************************
5417 *
5418 * uCode download functions
5419 *
5420 ******************************************************************************/
5421
5422static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5423{
5424 if (priv->ucode_code.v_addr != NULL) {
5425 pci_free_consistent(priv->pci_dev,
5426 priv->ucode_code.len,
5427 priv->ucode_code.v_addr,
5428 priv->ucode_code.p_addr);
5429 priv->ucode_code.v_addr = NULL;
5430 }
5431 if (priv->ucode_data.v_addr != NULL) {
5432 pci_free_consistent(priv->pci_dev,
5433 priv->ucode_data.len,
5434 priv->ucode_data.v_addr,
5435 priv->ucode_data.p_addr);
5436 priv->ucode_data.v_addr = NULL;
5437 }
5438 if (priv->ucode_data_backup.v_addr != NULL) {
5439 pci_free_consistent(priv->pci_dev,
5440 priv->ucode_data_backup.len,
5441 priv->ucode_data_backup.v_addr,
5442 priv->ucode_data_backup.p_addr);
5443 priv->ucode_data_backup.v_addr = NULL;
5444 }
5445 if (priv->ucode_init.v_addr != NULL) {
5446 pci_free_consistent(priv->pci_dev,
5447 priv->ucode_init.len,
5448 priv->ucode_init.v_addr,
5449 priv->ucode_init.p_addr);
5450 priv->ucode_init.v_addr = NULL;
5451 }
5452 if (priv->ucode_init_data.v_addr != NULL) {
5453 pci_free_consistent(priv->pci_dev,
5454 priv->ucode_init_data.len,
5455 priv->ucode_init_data.v_addr,
5456 priv->ucode_init_data.p_addr);
5457 priv->ucode_init_data.v_addr = NULL;
5458 }
5459 if (priv->ucode_boot.v_addr != NULL) {
5460 pci_free_consistent(priv->pci_dev,
5461 priv->ucode_boot.len,
5462 priv->ucode_boot.v_addr,
5463 priv->ucode_boot.p_addr);
5464 priv->ucode_boot.v_addr = NULL;
5465 }
5466}
5467
5468/**
5469 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5470 * looking at all data.
5471 */
5472static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5473{
5474 u32 val;
5475 u32 save_len = len;
5476 int rc = 0;
5477 u32 errcnt;
5478
5479 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5480
5481 rc = iwl_grab_restricted_access(priv);
5482 if (rc)
5483 return rc;
5484
5485 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5486
5487 errcnt = 0;
5488 for (; len > 0; len -= sizeof(u32), image++) {
5489 /* read data comes through single port, auto-incr addr */
5490 /* NOTE: Use the debugless read so we don't flood kernel log
5491 * if IWL_DL_IO is set */
5492 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5493 if (val != le32_to_cpu(*image)) {
5494 IWL_ERROR("uCode INST section is invalid at "
5495 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5496 save_len - len, val, le32_to_cpu(*image));
5497 rc = -EIO;
5498 errcnt++;
5499 if (errcnt >= 20)
5500 break;
5501 }
5502 }
5503
5504 iwl_release_restricted_access(priv);
5505
5506 if (!errcnt)
5507 IWL_DEBUG_INFO
5508 ("ucode image in INSTRUCTION memory is good\n");
5509
5510 return rc;
5511}
5512
5513
5514/**
5515 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5516 * using sample data 100 bytes apart. If these sample points are good,
5517 * it's a pretty good bet that everything between them is good, too.
5518 */
5519static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5520{
5521 u32 val;
5522 int rc = 0;
5523 u32 errcnt = 0;
5524 u32 i;
5525
5526 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5527
5528 rc = iwl_grab_restricted_access(priv);
5529 if (rc)
5530 return rc;
5531
5532 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5533 /* read data comes through single port, auto-incr addr */
5534 /* NOTE: Use the debugless read so we don't flood kernel log
5535 * if IWL_DL_IO is set */
5536 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5537 i + RTC_INST_LOWER_BOUND);
5538 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5539 if (val != le32_to_cpu(*image)) {
5540#if 0 /* Enable this if you want to see details */
5541 IWL_ERROR("uCode INST section is invalid at "
5542 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5543 i, val, *image);
5544#endif
5545 rc = -EIO;
5546 errcnt++;
5547 if (errcnt >= 3)
5548 break;
5549 }
5550 }
5551
5552 iwl_release_restricted_access(priv);
5553
5554 return rc;
5555}
5556
5557
5558/**
5559 * iwl_verify_ucode - determine which instruction image is in SRAM,
5560 * and verify its contents
5561 */
5562static int iwl_verify_ucode(struct iwl_priv *priv)
5563{
5564 __le32 *image;
5565 u32 len;
5566 int rc = 0;
5567
5568 /* Try bootstrap */
5569 image = (__le32 *)priv->ucode_boot.v_addr;
5570 len = priv->ucode_boot.len;
5571 rc = iwl_verify_inst_sparse(priv, image, len);
5572 if (rc == 0) {
5573 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5574 return 0;
5575 }
5576
5577 /* Try initialize */
5578 image = (__le32 *)priv->ucode_init.v_addr;
5579 len = priv->ucode_init.len;
5580 rc = iwl_verify_inst_sparse(priv, image, len);
5581 if (rc == 0) {
5582 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5583 return 0;
5584 }
5585
5586 /* Try runtime/protocol */
5587 image = (__le32 *)priv->ucode_code.v_addr;
5588 len = priv->ucode_code.len;
5589 rc = iwl_verify_inst_sparse(priv, image, len);
5590 if (rc == 0) {
5591 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5592 return 0;
5593 }
5594
5595 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5596
5597 /* Show first several data entries in instruction SRAM.
5598 * Selection of bootstrap image is arbitrary. */
5599 image = (__le32 *)priv->ucode_boot.v_addr;
5600 len = priv->ucode_boot.len;
5601 rc = iwl_verify_inst_full(priv, image, len);
5602
5603 return rc;
5604}
5605
5606
5607/* check contents of special bootstrap uCode SRAM */
5608static int iwl_verify_bsm(struct iwl_priv *priv)
5609{
5610 __le32 *image = priv->ucode_boot.v_addr;
5611 u32 len = priv->ucode_boot.len;
5612 u32 reg;
5613 u32 val;
5614
5615 IWL_DEBUG_INFO("Begin verify bsm\n");
5616
5617 /* verify BSM SRAM contents */
5618 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5619 for (reg = BSM_SRAM_LOWER_BOUND;
5620 reg < BSM_SRAM_LOWER_BOUND + len;
5621 reg += sizeof(u32), image ++) {
5622 val = iwl_read_restricted_reg(priv, reg);
5623 if (val != le32_to_cpu(*image)) {
5624 IWL_ERROR("BSM uCode verification failed at "
5625 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5626 BSM_SRAM_LOWER_BOUND,
5627 reg - BSM_SRAM_LOWER_BOUND, len,
5628 val, le32_to_cpu(*image));
5629 return -EIO;
5630 }
5631 }
5632
5633 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5634
5635 return 0;
5636}
5637
5638/**
5639 * iwl_load_bsm - Load bootstrap instructions
5640 *
5641 * BSM operation:
5642 *
5643 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5644 * in special SRAM that does not power down during RFKILL. When powering back
5645 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5646 * the bootstrap program into the on-board processor, and starts it.
5647 *
5648 * The bootstrap program loads (via DMA) instructions and data for a new
5649 * program from host DRAM locations indicated by the host driver in the
5650 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5651 * automatically.
5652 *
5653 * When initializing the NIC, the host driver points the BSM to the
5654 * "initialize" uCode image. This uCode sets up some internal data, then
5655 * notifies host via "initialize alive" that it is complete.
5656 *
5657 * The host then replaces the BSM_DRAM_* pointer values to point to the
5658 * normal runtime uCode instructions and a backup uCode data cache buffer
5659 * (filled initially with starting data values for the on-board processor),
5660 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5661 * which begins normal operation.
5662 *
5663 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5664 * the backup data cache in DRAM before SRAM is powered down.
5665 *
5666 * When powering back up, the BSM loads the bootstrap program. This reloads
5667 * the runtime uCode instructions and the backup data cache into SRAM,
5668 * and re-launches the runtime uCode from where it left off.
5669 */
5670static int iwl_load_bsm(struct iwl_priv *priv)
5671{
5672 __le32 *image = priv->ucode_boot.v_addr;
5673 u32 len = priv->ucode_boot.len;
5674 dma_addr_t pinst;
5675 dma_addr_t pdata;
5676 u32 inst_len;
5677 u32 data_len;
5678 int rc;
5679 int i;
5680 u32 done;
5681 u32 reg_offset;
5682
5683 IWL_DEBUG_INFO("Begin load bsm\n");
5684
5685 /* make sure bootstrap program is no larger than BSM's SRAM size */
5686 if (len > IWL_MAX_BSM_SIZE)
5687 return -EINVAL;
5688
5689 /* Tell bootstrap uCode where to find the "Initialize" uCode
5690 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5691 * NOTE: iwl_initialize_alive_start() will replace these values,
5692 * after the "initialize" uCode has run, to point to
5693 * runtime/protocol instructions and backup data cache. */
5694 pinst = priv->ucode_init.p_addr;
5695 pdata = priv->ucode_init_data.p_addr;
5696 inst_len = priv->ucode_init.len;
5697 data_len = priv->ucode_init_data.len;
5698
5699 rc = iwl_grab_restricted_access(priv);
5700 if (rc)
5701 return rc;
5702
5703 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5704 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5705 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5706 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5707
5708 /* Fill BSM memory with bootstrap instructions */
5709 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5710 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5711 reg_offset += sizeof(u32), image++)
5712 _iwl_write_restricted_reg(priv, reg_offset,
5713 le32_to_cpu(*image));
5714
5715 rc = iwl_verify_bsm(priv);
5716 if (rc) {
5717 iwl_release_restricted_access(priv);
5718 return rc;
5719 }
5720
5721 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5722 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5723 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5724 RTC_INST_LOWER_BOUND);
5725 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5726
5727 /* Load bootstrap code into instruction SRAM now,
5728 * to prepare to load "initialize" uCode */
5729 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5730 BSM_WR_CTRL_REG_BIT_START);
5731
5732 /* Wait for load of bootstrap uCode to finish */
5733 for (i = 0; i < 100; i++) {
5734 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5735 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5736 break;
5737 udelay(10);
5738 }
5739 if (i < 100)
5740 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5741 else {
5742 IWL_ERROR("BSM write did not complete!\n");
5743 return -EIO;
5744 }
5745
5746 /* Enable future boot loads whenever power management unit triggers it
5747 * (e.g. when powering back up after power-save shutdown) */
5748 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5749 BSM_WR_CTRL_REG_BIT_START_EN);
5750
5751 iwl_release_restricted_access(priv);
5752
5753 return 0;
5754}
5755
5756static void iwl_nic_start(struct iwl_priv *priv)
5757{
5758 /* Remove all resets to allow NIC to operate */
5759 iwl_write32(priv, CSR_RESET, 0);
5760}
5761
5762/**
5763 * iwl_read_ucode - Read uCode images from disk file.
5764 *
5765 * Copy into buffers for card to fetch via bus-mastering
5766 */
5767static int iwl_read_ucode(struct iwl_priv *priv)
5768{
5769 struct iwl_ucode *ucode;
5770 int rc = 0;
5771 const struct firmware *ucode_raw;
5772 /* firmware file name contains uCode/driver compatibility version */
5773 const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5774 u8 *src;
5775 size_t len;
5776 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5777
5778 /* Ask kernel firmware_class module to get the boot firmware off disk.
5779 * request_firmware() is synchronous, file is in memory on return. */
5780 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5781 if (rc < 0) {
5782 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5783 goto error;
5784 }
5785
5786 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5787 name, ucode_raw->size);
5788
5789 /* Make sure that we got at least our header! */
5790 if (ucode_raw->size < sizeof(*ucode)) {
5791 IWL_ERROR("File size way too small!\n");
5792 rc = -EINVAL;
5793 goto err_release;
5794 }
5795
5796 /* Data from ucode file: header followed by uCode images */
5797 ucode = (void *)ucode_raw->data;
5798
5799 ver = le32_to_cpu(ucode->ver);
5800 inst_size = le32_to_cpu(ucode->inst_size);
5801 data_size = le32_to_cpu(ucode->data_size);
5802 init_size = le32_to_cpu(ucode->init_size);
5803 init_data_size = le32_to_cpu(ucode->init_data_size);
5804 boot_size = le32_to_cpu(ucode->boot_size);
5805
5806 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5807 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5808 inst_size);
5809 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5810 data_size);
5811 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5812 init_size);
5813 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5814 init_data_size);
5815 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5816 boot_size);
5817
5818 /* Verify size of file vs. image size info in file's header */
5819 if (ucode_raw->size < sizeof(*ucode) +
5820 inst_size + data_size + init_size +
5821 init_data_size + boot_size) {
5822
5823 IWL_DEBUG_INFO("uCode file size %d too small\n",
5824 (int)ucode_raw->size);
5825 rc = -EINVAL;
5826 goto err_release;
5827 }
5828
5829 /* Verify that uCode images will fit in card's SRAM */
5830 if (inst_size > IWL_MAX_INST_SIZE) {
5831 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5832 (int)inst_size);
5833 rc = -EINVAL;
5834 goto err_release;
5835 }
5836
5837 if (data_size > IWL_MAX_DATA_SIZE) {
5838 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5839 (int)data_size);
5840 rc = -EINVAL;
5841 goto err_release;
5842 }
5843 if (init_size > IWL_MAX_INST_SIZE) {
5844 IWL_DEBUG_INFO
5845 ("uCode init instr len %d too large to fit in card\n",
5846 (int)init_size);
5847 rc = -EINVAL;
5848 goto err_release;
5849 }
5850 if (init_data_size > IWL_MAX_DATA_SIZE) {
5851 IWL_DEBUG_INFO
5852 ("uCode init data len %d too large to fit in card\n",
5853 (int)init_data_size);
5854 rc = -EINVAL;
5855 goto err_release;
5856 }
5857 if (boot_size > IWL_MAX_BSM_SIZE) {
5858 IWL_DEBUG_INFO
5859 ("uCode boot instr len %d too large to fit in bsm\n",
5860 (int)boot_size);
5861 rc = -EINVAL;
5862 goto err_release;
5863 }
5864
5865 /* Allocate ucode buffers for card's bus-master loading ... */
5866
5867 /* Runtime instructions and 2 copies of data:
5868 * 1) unmodified from disk
5869 * 2) backup cache for save/restore during power-downs */
5870 priv->ucode_code.len = inst_size;
5871 priv->ucode_code.v_addr =
5872 pci_alloc_consistent(priv->pci_dev,
5873 priv->ucode_code.len,
5874 &(priv->ucode_code.p_addr));
5875
5876 priv->ucode_data.len = data_size;
5877 priv->ucode_data.v_addr =
5878 pci_alloc_consistent(priv->pci_dev,
5879 priv->ucode_data.len,
5880 &(priv->ucode_data.p_addr));
5881
5882 priv->ucode_data_backup.len = data_size;
5883 priv->ucode_data_backup.v_addr =
5884 pci_alloc_consistent(priv->pci_dev,
5885 priv->ucode_data_backup.len,
5886 &(priv->ucode_data_backup.p_addr));
5887
5888
5889 /* Initialization instructions and data */
5890 priv->ucode_init.len = init_size;
5891 priv->ucode_init.v_addr =
5892 pci_alloc_consistent(priv->pci_dev,
5893 priv->ucode_init.len,
5894 &(priv->ucode_init.p_addr));
5895
5896 priv->ucode_init_data.len = init_data_size;
5897 priv->ucode_init_data.v_addr =
5898 pci_alloc_consistent(priv->pci_dev,
5899 priv->ucode_init_data.len,
5900 &(priv->ucode_init_data.p_addr));
5901
5902 /* Bootstrap (instructions only, no data) */
5903 priv->ucode_boot.len = boot_size;
5904 priv->ucode_boot.v_addr =
5905 pci_alloc_consistent(priv->pci_dev,
5906 priv->ucode_boot.len,
5907 &(priv->ucode_boot.p_addr));
5908
5909 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5910 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5911 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5912 goto err_pci_alloc;
5913
5914 /* Copy images into buffers for card's bus-master reads ... */
5915
5916 /* Runtime instructions (first block of data in file) */
5917 src = &ucode->data[0];
5918 len = priv->ucode_code.len;
5919 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5920 (int)len);
5921 memcpy(priv->ucode_code.v_addr, src, len);
5922 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5923 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5924
5925 /* Runtime data (2nd block)
5926 * NOTE: Copy into backup buffer will be done in iwl_up() */
5927 src = &ucode->data[inst_size];
5928 len = priv->ucode_data.len;
5929 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5930 (int)len);
5931 memcpy(priv->ucode_data.v_addr, src, len);
5932 memcpy(priv->ucode_data_backup.v_addr, src, len);
5933
5934 /* Initialization instructions (3rd block) */
5935 if (init_size) {
5936 src = &ucode->data[inst_size + data_size];
5937 len = priv->ucode_init.len;
5938 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5939 (int)len);
5940 memcpy(priv->ucode_init.v_addr, src, len);
5941 }
5942
5943 /* Initialization data (4th block) */
5944 if (init_data_size) {
5945 src = &ucode->data[inst_size + data_size + init_size];
5946 len = priv->ucode_init_data.len;
5947 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5948 (int)len);
5949 memcpy(priv->ucode_init_data.v_addr, src, len);
5950 }
5951
5952 /* Bootstrap instructions (5th block) */
5953 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5954 len = priv->ucode_boot.len;
5955 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5956 (int)len);
5957 memcpy(priv->ucode_boot.v_addr, src, len);
5958
5959 /* We have our copies now, allow OS release its copies */
5960 release_firmware(ucode_raw);
5961 return 0;
5962
5963 err_pci_alloc:
5964 IWL_ERROR("failed to allocate pci memory\n");
5965 rc = -ENOMEM;
5966 iwl_dealloc_ucode_pci(priv);
5967
5968 err_release:
5969 release_firmware(ucode_raw);
5970
5971 error:
5972 return rc;
5973}
5974
5975
5976/**
5977 * iwl_set_ucode_ptrs - Set uCode address location
5978 *
5979 * Tell initialization uCode where to find runtime uCode.
5980 *
5981 * BSM registers initially contain pointers to initialization uCode.
5982 * We need to replace them to load runtime uCode inst and data,
5983 * and to save runtime data when powering down.
5984 */
5985static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
5986{
5987 dma_addr_t pinst;
5988 dma_addr_t pdata;
5989 int rc = 0;
5990 unsigned long flags;
5991
5992 /* bits 31:0 for 3945 */
5993 pinst = priv->ucode_code.p_addr;
5994 pdata = priv->ucode_data_backup.p_addr;
5995
5996 spin_lock_irqsave(&priv->lock, flags);
5997 rc = iwl_grab_restricted_access(priv);
5998 if (rc) {
5999 spin_unlock_irqrestore(&priv->lock, flags);
6000 return rc;
6001 }
6002
6003 /* Tell bootstrap uCode where to find image to load */
6004 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6005 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6006 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6007 priv->ucode_data.len);
6008
6009 /* Inst bytecount must be last to set up, bit 31 signals uCode
6010 * that all new ptr/size info is in place */
6011 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6012 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6013
6014 iwl_release_restricted_access(priv);
6015
6016 spin_unlock_irqrestore(&priv->lock, flags);
6017
6018 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6019
6020 return rc;
6021}
6022
6023/**
6024 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6025 *
6026 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6027 *
6028 * The 4965 "initialize" ALIVE reply contains calibration data for:
6029 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6030 * (3945 does not contain this data).
6031 *
6032 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6033*/
6034static void iwl_init_alive_start(struct iwl_priv *priv)
6035{
6036 /* Check alive response for "valid" sign from uCode */
6037 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6038 /* We had an error bringing up the hardware, so take it
6039 * all the way back down so we can try again */
6040 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6041 goto restart;
6042 }
6043
6044 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6045 * This is a paranoid check, because we would not have gotten the
6046 * "initialize" alive if code weren't properly loaded. */
6047 if (iwl_verify_ucode(priv)) {
6048 /* Runtime instruction load was bad;
6049 * take it all the way back down so we can try again */
6050 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6051 goto restart;
6052 }
6053
6054 /* Send pointers to protocol/runtime uCode image ... init code will
6055 * load and launch runtime uCode, which will send us another "Alive"
6056 * notification. */
6057 IWL_DEBUG_INFO("Initialization Alive received.\n");
6058 if (iwl_set_ucode_ptrs(priv)) {
6059 /* Runtime instruction load won't happen;
6060 * take it all the way back down so we can try again */
6061 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6062 goto restart;
6063 }
6064 return;
6065
6066 restart:
6067 queue_work(priv->workqueue, &priv->restart);
6068}
6069
6070
6071/**
6072 * iwl_alive_start - called after REPLY_ALIVE notification received
6073 * from protocol/runtime uCode (initialization uCode's
6074 * Alive gets handled by iwl_init_alive_start()).
6075 */
6076static void iwl_alive_start(struct iwl_priv *priv)
6077{
6078 int rc = 0;
6079 int thermal_spin = 0;
6080 u32 rfkill;
6081
6082 IWL_DEBUG_INFO("Runtime Alive received.\n");
6083
6084 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6085 /* We had an error bringing up the hardware, so take it
6086 * all the way back down so we can try again */
6087 IWL_DEBUG_INFO("Alive failed.\n");
6088 goto restart;
6089 }
6090
6091 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6092 * This is a paranoid check, because we would not have gotten the
6093 * "runtime" alive if code weren't properly loaded. */
6094 if (iwl_verify_ucode(priv)) {
6095 /* Runtime instruction load was bad;
6096 * take it all the way back down so we can try again */
6097 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6098 goto restart;
6099 }
6100
6101 iwl_clear_stations_table(priv);
6102
6103 rc = iwl_grab_restricted_access(priv);
6104 if (rc) {
6105 IWL_WARNING("Can not read rfkill status from adapter\n");
6106 return;
6107 }
6108
6109 rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6110 IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6111 iwl_release_restricted_access(priv);
6112
6113 if (rfkill & 0x1) {
6114 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6115 /* if rfkill is not on, then wait for thermal
6116 * sensor in adapter to kick in */
6117 while (iwl_hw_get_temperature(priv) == 0) {
6118 thermal_spin++;
6119 udelay(10);
6120 }
6121
6122 if (thermal_spin)
6123 IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6124 thermal_spin * 10);
6125 } else
6126 set_bit(STATUS_RF_KILL_HW, &priv->status);
6127
6128 /* After the ALIVE response, we can process host commands */
6129 set_bit(STATUS_ALIVE, &priv->status);
6130
6131 /* Clear out the uCode error bit if it is set */
6132 clear_bit(STATUS_FW_ERROR, &priv->status);
6133
6134 rc = iwl_init_channel_map(priv);
6135 if (rc) {
6136 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6137 return;
6138 }
6139
6140 iwl_init_geos(priv);
6141
6142 if (iwl_is_rfkill(priv))
6143 return;
6144
6145 if (!priv->mac80211_registered) {
6146 /* Unlock so any user space entry points can call back into
6147 * the driver without a deadlock... */
6148 mutex_unlock(&priv->mutex);
6149 iwl_rate_control_register(priv->hw);
6150 rc = ieee80211_register_hw(priv->hw);
6151 priv->hw->conf.beacon_int = 100;
6152 mutex_lock(&priv->mutex);
6153
6154 if (rc) {
6155 IWL_ERROR("Failed to register network "
6156 "device (error %d)\n", rc);
6157 return;
6158 }
6159
6160 priv->mac80211_registered = 1;
6161
6162 iwl_reset_channel_flag(priv);
6163 } else
6164 ieee80211_start_queues(priv->hw);
6165
6166 priv->active_rate = priv->rates_mask;
6167 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6168
6169 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6170
6171 if (iwl_is_associated(priv)) {
6172 struct iwl_rxon_cmd *active_rxon =
6173 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6174
6175 memcpy(&priv->staging_rxon, &priv->active_rxon,
6176 sizeof(priv->staging_rxon));
6177 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6178 } else {
6179 /* Initialize our rx_config data */
6180 iwl_connection_init_rx_config(priv);
6181 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6182 }
6183
6184 /* Configure BT coexistence */
6185 iwl_send_bt_config(priv);
6186
6187 /* Configure the adapter for unassociated operation */
6188 iwl_commit_rxon(priv);
6189
6190 /* At this point, the NIC is initialized and operational */
6191 priv->notif_missed_beacons = 0;
6192 set_bit(STATUS_READY, &priv->status);
6193
6194 iwl3945_reg_txpower_periodic(priv);
6195
6196 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6197
6198 if (priv->error_recovering)
6199 iwl_error_recovery(priv);
6200
6201 return;
6202
6203 restart:
6204 queue_work(priv->workqueue, &priv->restart);
6205}
6206
6207static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6208
6209static void __iwl_down(struct iwl_priv *priv)
6210{
6211 unsigned long flags;
6212 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6213 struct ieee80211_conf *conf = NULL;
6214
6215 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6216
6217 conf = ieee80211_get_hw_conf(priv->hw);
6218
6219 if (!exit_pending)
6220 set_bit(STATUS_EXIT_PENDING, &priv->status);
6221
6222 iwl_clear_stations_table(priv);
6223
6224 /* Unblock any waiting calls */
6225 wake_up_interruptible_all(&priv->wait_command_queue);
6226
6227 iwl_cancel_deferred_work(priv);
6228
6229 /* Wipe out the EXIT_PENDING status bit if we are not actually
6230 * exiting the module */
6231 if (!exit_pending)
6232 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6233
6234 /* stop and reset the on-board processor */
6235 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6236
6237 /* tell the device to stop sending interrupts */
6238 iwl_disable_interrupts(priv);
6239
6240 if (priv->mac80211_registered)
6241 ieee80211_stop_queues(priv->hw);
6242
6243 /* If we have not previously called iwl_init() then
6244 * clear all bits but the RF Kill and SUSPEND bits and return */
6245 if (!iwl_is_init(priv)) {
6246 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6247 STATUS_RF_KILL_HW |
6248 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6249 STATUS_RF_KILL_SW |
6250 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6251 STATUS_IN_SUSPEND;
6252 goto exit;
6253 }
6254
6255 /* ...otherwise clear out all the status bits but the RF Kill and
6256 * SUSPEND bits and continue taking the NIC down. */
6257 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6258 STATUS_RF_KILL_HW |
6259 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6260 STATUS_RF_KILL_SW |
6261 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6262 STATUS_IN_SUSPEND |
6263 test_bit(STATUS_FW_ERROR, &priv->status) <<
6264 STATUS_FW_ERROR;
6265
6266 spin_lock_irqsave(&priv->lock, flags);
6267 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6268 spin_unlock_irqrestore(&priv->lock, flags);
6269
6270 iwl_hw_txq_ctx_stop(priv);
6271 iwl_hw_rxq_stop(priv);
6272
6273 spin_lock_irqsave(&priv->lock, flags);
6274 if (!iwl_grab_restricted_access(priv)) {
6275 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6276 APMG_CLK_VAL_DMA_CLK_RQT);
6277 iwl_release_restricted_access(priv);
6278 }
6279 spin_unlock_irqrestore(&priv->lock, flags);
6280
6281 udelay(5);
6282
6283 iwl_hw_nic_stop_master(priv);
6284 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6285 iwl_hw_nic_reset(priv);
6286
6287 exit:
6288 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6289
6290 if (priv->ibss_beacon)
6291 dev_kfree_skb(priv->ibss_beacon);
6292 priv->ibss_beacon = NULL;
6293
6294 /* clear out any free frames */
6295 iwl_clear_free_frames(priv);
6296}
6297
6298static void iwl_down(struct iwl_priv *priv)
6299{
6300 mutex_lock(&priv->mutex);
6301 __iwl_down(priv);
6302 mutex_unlock(&priv->mutex);
6303}
6304
6305#define MAX_HW_RESTARTS 5
6306
6307static int __iwl_up(struct iwl_priv *priv)
6308{
0795af57 6309 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 6310 int rc, i;
6311
6312 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6313 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6314 return -EIO;
6315 }
6316
6317 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6318 IWL_WARNING("Radio disabled by SW RF kill (module "
6319 "parameter)\n");
6320 return 0;
6321 }
6322
6323 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6324
6325 rc = iwl_hw_nic_init(priv);
6326 if (rc) {
6327 IWL_ERROR("Unable to int nic\n");
6328 return rc;
6329 }
6330
6331 /* make sure rfkill handshake bits are cleared */
6332 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6333 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6334 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6335
6336 /* clear (again), then enable host interrupts */
6337 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6338 iwl_enable_interrupts(priv);
6339
6340 /* really make sure rfkill handshake bits are cleared */
6341 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6342 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6343
6344 /* Copy original ucode data image from disk into backup cache.
6345 * This will be used to initialize the on-board processor's
6346 * data SRAM for a clean start when the runtime program first loads. */
6347 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6348 priv->ucode_data.len);
6349
6350 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6351
6352 iwl_clear_stations_table(priv);
6353
6354 /* load bootstrap state machine,
6355 * load bootstrap program into processor's memory,
6356 * prepare to load the "initialize" uCode */
6357 rc = iwl_load_bsm(priv);
6358
6359 if (rc) {
6360 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6361 continue;
6362 }
6363
6364 /* start card; "initialize" will load runtime ucode */
6365 iwl_nic_start(priv);
6366
6367 /* MAC Address location in EEPROM same for 3945/4965 */
6368 get_eeprom_mac(priv, priv->mac_addr);
0795af57
JP		 6369 IWL_DEBUG_INFO("MAC address: %s\n",
6370 print_mac(mac, priv->mac_addr));
b481de9c
ZY		 6371
6372 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6373
6374 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6375
6376 return 0;
6377 }
6378
6379 set_bit(STATUS_EXIT_PENDING, &priv->status);
6380 __iwl_down(priv);
6381
6382 /* tried to restart and config the device for as long as our
6383 * patience could withstand */
6384 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6385 return -EIO;
6386}
6387
6388
6389/*****************************************************************************
6390 *
6391 * Workqueue callbacks
6392 *
6393 *****************************************************************************/
6394
6395static void iwl_bg_init_alive_start(struct work_struct *data)
6396{
6397 struct iwl_priv *priv =
6398 container_of(data, struct iwl_priv, init_alive_start.work);
6399
6400 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6401 return;
6402
6403 mutex_lock(&priv->mutex);
6404 iwl_init_alive_start(priv);
6405 mutex_unlock(&priv->mutex);
6406}
6407
6408static void iwl_bg_alive_start(struct work_struct *data)
6409{
6410 struct iwl_priv *priv =
6411 container_of(data, struct iwl_priv, alive_start.work);
6412
6413 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6414 return;
6415
6416 mutex_lock(&priv->mutex);
6417 iwl_alive_start(priv);
6418 mutex_unlock(&priv->mutex);
6419}
6420
6421static void iwl_bg_rf_kill(struct work_struct *work)
6422{
6423 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6424
6425 wake_up_interruptible(&priv->wait_command_queue);
6426
6427 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6428 return;
6429
6430 mutex_lock(&priv->mutex);
6431
6432 if (!iwl_is_rfkill(priv)) {
6433 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6434 "HW and/or SW RF Kill no longer active, restarting "
6435 "device\n");
6436 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6437 queue_work(priv->workqueue, &priv->restart);
6438 } else {
6439
6440 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6441 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6442 "disabled by SW switch\n");
6443 else
6444 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6445 "Kill switch must be turned off for "
6446 "wireless networking to work.\n");
6447 }
6448 mutex_unlock(&priv->mutex);
6449}
6450
6451#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6452
6453static void iwl_bg_scan_check(struct work_struct *data)
6454{
6455 struct iwl_priv *priv =
6456 container_of(data, struct iwl_priv, scan_check.work);
6457
6458 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6459 return;
6460
6461 mutex_lock(&priv->mutex);
6462 if (test_bit(STATUS_SCANNING, &priv->status) ||
6463 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6464 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6465 "Scan completion watchdog resetting adapter (%dms)\n",
6466 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6467 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6468 queue_work(priv->workqueue, &priv->restart);
6469 }
6470 mutex_unlock(&priv->mutex);
6471}
6472
6473static void iwl_bg_request_scan(struct work_struct *data)
6474{
6475 struct iwl_priv *priv =
6476 container_of(data, struct iwl_priv, request_scan);
6477 struct iwl_host_cmd cmd = {
6478 .id = REPLY_SCAN_CMD,
6479 .len = sizeof(struct iwl_scan_cmd),
6480 .meta.flags = CMD_SIZE_HUGE,
6481 };
6482 int rc = 0;
6483 struct iwl_scan_cmd *scan;
6484 struct ieee80211_conf *conf = NULL;
6485 u8 direct_mask;
6486 int phymode;
6487
6488 conf = ieee80211_get_hw_conf(priv->hw);
6489
6490 mutex_lock(&priv->mutex);
6491
6492 if (!iwl_is_ready(priv)) {
6493 IWL_WARNING("request scan called when driver not ready.\n");
6494 goto done;
6495 }
6496
6497 /* Make sure the scan wasn't cancelled before this queued work
6498 * was given the chance to run... */
6499 if (!test_bit(STATUS_SCANNING, &priv->status))
6500 goto done;
6501
6502 /* This should never be called or scheduled if there is currently
6503 * a scan active in the hardware. */
6504 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6505 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6506 "Ignoring second request.\n");
6507 rc = -EIO;
6508 goto done;
6509 }
6510
6511 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6512 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6513 goto done;
6514 }
6515
6516 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6517 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6518 goto done;
6519 }
6520
6521 if (iwl_is_rfkill(priv)) {
6522 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6523 goto done;
6524 }
6525
6526 if (!test_bit(STATUS_READY, &priv->status)) {
6527 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6528 goto done;
6529 }
6530
6531 if (!priv->scan_bands) {
6532 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6533 goto done;
6534 }
6535
6536 if (!priv->scan) {
6537 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6538 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6539 if (!priv->scan) {
6540 rc = -ENOMEM;
6541 goto done;
6542 }
6543 }
6544 scan = priv->scan;
6545 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6546
6547 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6548 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6549
6550 if (iwl_is_associated(priv)) {
6551 u16 interval = 0;
6552 u32 extra;
6553 u32 suspend_time = 100;
6554 u32 scan_suspend_time = 100;
6555 unsigned long flags;
6556
6557 IWL_DEBUG_INFO("Scanning while associated...\n");
6558
6559 spin_lock_irqsave(&priv->lock, flags);
6560 interval = priv->beacon_int;
6561 spin_unlock_irqrestore(&priv->lock, flags);
6562
6563 scan->suspend_time = 0;
6564 scan->max_out_time = cpu_to_le32(600 * 1024);
6565 if (!interval)
6566 interval = suspend_time;
6567 /*
6568 * suspend time format:
6569 * 0-19: beacon interval in usec (time before exec.)
6570 * 20-23: 0
6571 * 24-31: number of beacons (suspend between channels)
6572 */
6573
6574 extra = (suspend_time / interval) << 24;
6575 scan_suspend_time = 0xFF0FFFFF &
6576 (extra | ((suspend_time % interval) * 1024));
6577
6578 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6579 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6580 scan_suspend_time, interval);
6581 }
6582
6583 /* We should add the ability for user to lock to PASSIVE ONLY */
6584 if (priv->one_direct_scan) {
6585 IWL_DEBUG_SCAN
6586 ("Kicking off one direct scan for '%s'\n",
6587 iwl_escape_essid(priv->direct_ssid,
6588 priv->direct_ssid_len));
6589 scan->direct_scan[0].id = WLAN_EID_SSID;
6590 scan->direct_scan[0].len = priv->direct_ssid_len;
6591 memcpy(scan->direct_scan[0].ssid,
6592 priv->direct_ssid, priv->direct_ssid_len);
6593 direct_mask = 1;
6594 } else if (!iwl_is_associated(priv)) {
6595 scan->direct_scan[0].id = WLAN_EID_SSID;
6596 scan->direct_scan[0].len = priv->essid_len;
6597 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6598 direct_mask = 1;
6599 } else
6600 direct_mask = 0;
6601
6602 /* We don't build a direct scan probe request; the uCode will do
6603 * that based on the direct_mask added to each channel entry */
6604 scan->tx_cmd.len = cpu_to_le16(
6605 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6606 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6607 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6608 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6609 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6610
6611 /* flags + rate selection */
6612
6613 switch (priv->scan_bands) {
6614 case 2:
6615 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6616 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6617 scan->good_CRC_th = 0;
6618 phymode = MODE_IEEE80211G;
6619 break;
6620
6621 case 1:
6622 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6623 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6624 phymode = MODE_IEEE80211A;
6625 break;
6626
6627 default:
6628 IWL_WARNING("Invalid scan band count\n");
6629 goto done;
6630 }
6631
6632 /* select Rx antennas */
6633 scan->flags |= iwl3945_get_antenna_flags(priv);
6634
6635 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6636 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6637
6638 if (direct_mask)
6639 IWL_DEBUG_SCAN
6640 ("Initiating direct scan for %s.\n",
6641 iwl_escape_essid(priv->essid, priv->essid_len));
6642 else
6643 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6644
6645 scan->channel_count =
6646 iwl_get_channels_for_scan(
6647 priv, phymode, 1, /* active */
6648 direct_mask,
6649 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6650
6651 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6652 scan->channel_count * sizeof(struct iwl_scan_channel);
6653 cmd.data = scan;
6654 scan->len = cpu_to_le16(cmd.len);
6655
6656 set_bit(STATUS_SCAN_HW, &priv->status);
6657 rc = iwl_send_cmd_sync(priv, &cmd);
6658 if (rc)
6659 goto done;
6660
6661 queue_delayed_work(priv->workqueue, &priv->scan_check,
6662 IWL_SCAN_CHECK_WATCHDOG);
6663
6664 mutex_unlock(&priv->mutex);
6665 return;
6666
6667 done:
6668 /* inform mac80211 sacn aborted */
6669 queue_work(priv->workqueue, &priv->scan_completed);
6670 mutex_unlock(&priv->mutex);
6671}
6672
6673static void iwl_bg_up(struct work_struct *data)
6674{
6675 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6676
6677 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6678 return;
6679
6680 mutex_lock(&priv->mutex);
6681 __iwl_up(priv);
6682 mutex_unlock(&priv->mutex);
6683}
6684
6685static void iwl_bg_restart(struct work_struct *data)
6686{
6687 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6688
6689 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6690 return;
6691
6692 iwl_down(priv);
6693 queue_work(priv->workqueue, &priv->up);
6694}
6695
6696static void iwl_bg_rx_replenish(struct work_struct *data)
6697{
6698 struct iwl_priv *priv =
6699 container_of(data, struct iwl_priv, rx_replenish);
6700
6701 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6702 return;
6703
6704 mutex_lock(&priv->mutex);
6705 iwl_rx_replenish(priv);
6706 mutex_unlock(&priv->mutex);
6707}
6708
6709static void iwl_bg_post_associate(struct work_struct *data)
6710{
6711 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6712 post_associate.work);
6713
6714 int rc = 0;
6715 struct ieee80211_conf *conf = NULL;
0795af57 6716 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 6717
6718 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6719 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6720 return;
6721 }
6722
6723
0795af57
JP		 6724 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6725 priv->assoc_id,
6726 print_mac(mac, priv->active_rxon.bssid_addr));
b481de9c
ZY		 6727
6728 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6729 return;
6730
6731 mutex_lock(&priv->mutex);
6732
6733 conf = ieee80211_get_hw_conf(priv->hw);
6734
6735 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6736 iwl_commit_rxon(priv);
6737
6738 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6739 iwl_setup_rxon_timing(priv);
6740 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6741 sizeof(priv->rxon_timing), &priv->rxon_timing);
6742 if (rc)
6743 IWL_WARNING("REPLY_RXON_TIMING failed - "
6744 "Attempting to continue.\n");
6745
6746 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6747
6748 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6749
6750 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6751 priv->assoc_id, priv->beacon_int);
6752
6753 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6754 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6755 else
6756 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6757
6758 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6759 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6760 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6761 else
6762 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6763
6764 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6765 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6766
6767 }
6768
6769 iwl_commit_rxon(priv);
6770
6771 switch (priv->iw_mode) {
6772 case IEEE80211_IF_TYPE_STA:
6773 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6774 break;
6775
6776 case IEEE80211_IF_TYPE_IBSS:
6777
6778 /* clear out the station table */
6779 iwl_clear_stations_table(priv);
6780
556f8db7
ZY		 6781 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6782 iwl_add_station(priv, priv->bssid, 0, 0);
b481de9c
ZY		 6783 iwl3945_sync_sta(priv, IWL_STA_ID,
6784 (priv->phymode == MODE_IEEE80211A)?
6785 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6786 CMD_ASYNC);
6787 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6788 iwl_send_beacon_cmd(priv);
6789
6790 break;
6791
6792 default:
6793 IWL_ERROR("%s Should not be called in %d mode\n",
6794 __FUNCTION__, priv->iw_mode);
6795 break;
6796 }
6797
6798 iwl_sequence_reset(priv);
6799
6800#ifdef CONFIG_IWLWIFI_QOS
6801 iwl_activate_qos(priv, 0);
6802#endif /* CONFIG_IWLWIFI_QOS */
6803 mutex_unlock(&priv->mutex);
6804}
6805
6806static void iwl_bg_abort_scan(struct work_struct *work)
6807{
6808 struct iwl_priv *priv = container_of(work, struct iwl_priv,
6809 abort_scan);
6810
6811 if (!iwl_is_ready(priv))
6812 return;
6813
6814 mutex_lock(&priv->mutex);
6815
6816 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6817 iwl_send_scan_abort(priv);
6818
6819 mutex_unlock(&priv->mutex);
6820}
6821
6822static void iwl_bg_scan_completed(struct work_struct *work)
6823{
6824 struct iwl_priv *priv =
6825 container_of(work, struct iwl_priv, scan_completed);
6826
6827 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6828
6829 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6830 return;
6831
6832 ieee80211_scan_completed(priv->hw);
6833
6834 /* Since setting the TXPOWER may have been deferred while
6835 * performing the scan, fire one off */
6836 mutex_lock(&priv->mutex);
6837 iwl_hw_reg_send_txpower(priv);
6838 mutex_unlock(&priv->mutex);
6839}
6840
6841/*****************************************************************************
6842 *
6843 * mac80211 entry point functions
6844 *
6845 *****************************************************************************/
6846
4150c572 6847static int iwl_mac_start(struct ieee80211_hw *hw)
b481de9c
ZY		 6848{
6849 struct iwl_priv *priv = hw->priv;
6850
6851 IWL_DEBUG_MAC80211("enter\n");
6852
6853 /* we should be verifying the device is ready to be opened */
6854 mutex_lock(&priv->mutex);
6855
6856 priv->is_open = 1;
6857
6858 if (!iwl_is_rfkill(priv))
6859 ieee80211_start_queues(priv->hw);
6860
6861 mutex_unlock(&priv->mutex);
6862 IWL_DEBUG_MAC80211("leave\n");
6863 return 0;
6864}
6865
4150c572 6866static void iwl_mac_stop(struct ieee80211_hw *hw)
b481de9c
ZY		 6867{
6868 struct iwl_priv *priv = hw->priv;
6869
6870 IWL_DEBUG_MAC80211("enter\n");
6871 priv->is_open = 0;
6872 /*netif_stop_queue(dev); */
6873 flush_workqueue(priv->workqueue);
6874 IWL_DEBUG_MAC80211("leave\n");
b481de9c
ZY		 6875}
6876
6877static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6878 struct ieee80211_tx_control *ctl)
6879{
6880 struct iwl_priv *priv = hw->priv;
6881
6882 IWL_DEBUG_MAC80211("enter\n");
6883
6884 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6885 IWL_DEBUG_MAC80211("leave - monitor\n");
6886 return -1;
6887 }
6888
6889 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6890 ctl->tx_rate);
6891
6892 if (iwl_tx_skb(priv, skb, ctl))
6893 dev_kfree_skb_any(skb);
6894
6895 IWL_DEBUG_MAC80211("leave\n");
6896 return 0;
6897}
6898
6899static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6900 struct ieee80211_if_init_conf *conf)
6901{
6902 struct iwl_priv *priv = hw->priv;
6903 unsigned long flags;
0795af57 6904 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 6905
6906 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6907 if (conf->mac_addr)
0795af57
JP		 6908 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6909 print_mac(mac, conf->mac_addr));
b481de9c
ZY		 6910
6911 if (priv->interface_id) {
6912 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6913 return 0;
6914 }
6915
6916 spin_lock_irqsave(&priv->lock, flags);
6917 priv->interface_id = conf->if_id;
6918
6919 spin_unlock_irqrestore(&priv->lock, flags);
6920
6921 mutex_lock(&priv->mutex);
6922 iwl_set_mode(priv, conf->type);
6923
6924 IWL_DEBUG_MAC80211("leave\n");
6925 mutex_unlock(&priv->mutex);
6926
6927 return 0;
6928}
6929
6930/**
6931 * iwl_mac_config - mac80211 config callback
6932 *
6933 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6934 * be set inappropriately and the driver currently sets the hardware up to
6935 * use it whenever needed.
6936 */
6937static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6938{
6939 struct iwl_priv *priv = hw->priv;
6940 const struct iwl_channel_info *ch_info;
6941 unsigned long flags;
6942
6943 mutex_lock(&priv->mutex);
6944 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6945
6946 if (!iwl_is_ready(priv)) {
6947 IWL_DEBUG_MAC80211("leave - not ready\n");
6948 mutex_unlock(&priv->mutex);
6949 return -EIO;
6950 }
6951
6952 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6953 * what is exposed through include/ declrations */
6954 if (unlikely(!iwl_param_disable_hw_scan &&
6955 test_bit(STATUS_SCANNING, &priv->status))) {
6956 IWL_DEBUG_MAC80211("leave - scanning\n");
6957 mutex_unlock(&priv->mutex);
6958 return 0;
6959 }
6960
6961 spin_lock_irqsave(&priv->lock, flags);
6962
6963 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6964 if (!is_channel_valid(ch_info)) {
6965 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6966 conf->channel, conf->phymode);
6967 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6968 spin_unlock_irqrestore(&priv->lock, flags);
6969 mutex_unlock(&priv->mutex);
6970 return -EINVAL;
6971 }
6972
6973 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6974
6975 iwl_set_flags_for_phymode(priv, conf->phymode);
6976
6977 /* The list of supported rates and rate mask can be different
6978 * for each phymode; since the phymode may have changed, reset
6979 * the rate mask to what mac80211 lists */
6980 iwl_set_rate(priv);
6981
6982 spin_unlock_irqrestore(&priv->lock, flags);
6983
6984#ifdef IEEE80211_CONF_CHANNEL_SWITCH
6985 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6986 iwl_hw_channel_switch(priv, conf->channel);
6987 mutex_unlock(&priv->mutex);
6988 return 0;
6989 }
6990#endif
6991
6992 iwl_radio_kill_sw(priv, !conf->radio_enabled);
6993
6994 if (!conf->radio_enabled) {
6995 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6996 mutex_unlock(&priv->mutex);
6997 return 0;
6998 }
6999
7000 if (iwl_is_rfkill(priv)) {
7001 IWL_DEBUG_MAC80211("leave - RF kill\n");
7002 mutex_unlock(&priv->mutex);
7003 return -EIO;
7004 }
7005
7006 iwl_set_rate(priv);
7007
7008 if (memcmp(&priv->active_rxon,
7009 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7010 iwl_commit_rxon(priv);
7011 else
7012 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7013
7014 IWL_DEBUG_MAC80211("leave\n");
7015
7016 mutex_unlock(&priv->mutex);
7017
7018 return 0;
7019}
7020
7021static void iwl_config_ap(struct iwl_priv *priv)
7022{
7023 int rc = 0;
7024
7025 if (priv->status & STATUS_EXIT_PENDING)
7026 return;
7027
7028 /* The following should be done only at AP bring up */
7029 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7030
7031 /* RXON - unassoc (to set timing command) */
7032 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7033 iwl_commit_rxon(priv);
7034
7035 /* RXON Timing */
7036 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7037 iwl_setup_rxon_timing(priv);
7038 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7039 sizeof(priv->rxon_timing), &priv->rxon_timing);
7040 if (rc)
7041 IWL_WARNING("REPLY_RXON_TIMING failed - "
7042 "Attempting to continue.\n");
7043
7044 /* FIXME: what should be the assoc_id for AP? */
7045 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7046 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7047 priv->staging_rxon.flags |=
7048 RXON_FLG_SHORT_PREAMBLE_MSK;
7049 else
7050 priv->staging_rxon.flags &=
7051 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7052
7053 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7054 if (priv->assoc_capability &
7055 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7056 priv->staging_rxon.flags |=
7057 RXON_FLG_SHORT_SLOT_MSK;
7058 else
7059 priv->staging_rxon.flags &=
7060 ~RXON_FLG_SHORT_SLOT_MSK;
7061
7062 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7063 priv->staging_rxon.flags &=
7064 ~RXON_FLG_SHORT_SLOT_MSK;
7065 }
7066 /* restore RXON assoc */
7067 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7068 iwl_commit_rxon(priv);
556f8db7
ZY		 7069 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7070 }
7071 iwl_send_beacon_cmd(priv);
b481de9c
ZY		 7072
7073 /* FIXME - we need to add code here to detect a totally new
7074 * configuration, reset the AP, unassoc, rxon timing, assoc,
7075 * clear sta table, add BCAST sta... */
7076}
7077
7078static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7079 struct ieee80211_if_conf *conf)
7080{
7081 struct iwl_priv *priv = hw->priv;
0795af57 7082 DECLARE_MAC_BUF(mac);
b481de9c
ZY		 7083 unsigned long flags;
7084 int rc;
7085
7086 if (conf == NULL)
7087 return -EIO;
7088
4150c572
JB		 7089 /* XXX: this MUST use conf->mac_addr */
7090
b481de9c
ZY		 7091 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7092 (!conf->beacon || !conf->ssid_len)) {
7093 IWL_DEBUG_MAC80211
7094 ("Leaving in AP mode because HostAPD is not ready.\n");
7095 return 0;
7096 }
7097
7098 mutex_lock(&priv->mutex);
7099
7100 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7101 if (conf->bssid)
0795af57
JP		 7102 IWL_DEBUG_MAC80211("bssid: %s\n",
7103 print_mac(mac, conf->bssid));
b481de9c 7104
4150c572
JB		 7105/*
7106 * very dubious code was here; the probe filtering flag is never set:
7107 *
b481de9c
ZY		 7108 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7109 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
4150c572
JB		 7110 */
7111 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
b481de9c
ZY		 7112 IWL_DEBUG_MAC80211("leave - scanning\n");
7113 mutex_unlock(&priv->mutex);
7114 return 0;
7115 }
7116
7117 if (priv->interface_id != if_id) {
7118 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7119 mutex_unlock(&priv->mutex);
7120 return 0;
7121 }
7122
7123 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7124 if (!conf->bssid) {
7125 conf->bssid = priv->mac_addr;
7126 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
0795af57
JP		 7127 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7128 print_mac(mac, conf->bssid));
b481de9c
ZY		 7129 }
7130 if (priv->ibss_beacon)
7131 dev_kfree_skb(priv->ibss_beacon);
7132
7133 priv->ibss_beacon = conf->beacon;
7134 }
7135
7136 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7137 !is_multicast_ether_addr(conf->bssid)) {
7138 /* If there is currently a HW scan going on in the background
7139 * then we need to cancel it else the RXON below will fail. */
7140 if (iwl_scan_cancel_timeout(priv, 100)) {
7141 IWL_WARNING("Aborted scan still in progress "
7142 "after 100ms\n");
7143 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7144 mutex_unlock(&priv->mutex);
7145 return -EAGAIN;
7146 }
7147 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7148
7149 /* TODO: Audit driver for usage of these members and see
7150 * if mac80211 deprecates them (priv->bssid looks like it
7151 * shouldn't be there, but I haven't scanned the IBSS code
7152 * to verify) - jpk */
7153 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7154
7155 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7156 iwl_config_ap(priv);
7157 else {
7158 priv->staging_rxon.filter_flags |=
7159 RXON_FILTER_ASSOC_MSK;
7160 rc = iwl_commit_rxon(priv);
7161 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
556f8db7
ZY		 7162 iwl_add_station(priv,
7163 priv->active_rxon.bssid_addr, 1, 0);
b481de9c
ZY		 7164 }
7165
7166 } else {
7167 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7168 iwl_commit_rxon(priv);
7169 }
7170
7171 spin_lock_irqsave(&priv->lock, flags);
7172 if (!conf->ssid_len)
7173 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7174 else
7175 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7176
7177 priv->essid_len = conf->ssid_len;
7178 spin_unlock_irqrestore(&priv->lock, flags);
7179
7180 IWL_DEBUG_MAC80211("leave\n");
7181 mutex_unlock(&priv->mutex);
7182
7183 return 0;
7184}
7185
4150c572
JB		 7186static void iwl_configure_filter(struct ieee80211_hw *hw,
7187 unsigned int changed_flags,
7188 unsigned int *total_flags,
7189 int mc_count, struct dev_addr_list *mc_list)
7190{
7191 /*
7192 * XXX: dummy
7193 * see also iwl_connection_init_rx_config
7194 */
7195 *total_flags = 0;
7196}
7197
b481de9c
ZY		 7198static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7199 struct ieee80211_if_init_conf *conf)
7200{
7201 struct iwl_priv *priv = hw->priv;
7202
7203 IWL_DEBUG_MAC80211("enter\n");
7204
7205 mutex_lock(&priv->mutex);
7206 if (priv->interface_id == conf->if_id) {
7207 priv->interface_id = 0;
7208 memset(priv->bssid, 0, ETH_ALEN);
7209 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7210 priv->essid_len = 0;
7211 }
7212 mutex_unlock(&priv->mutex);
7213
7214 IWL_DEBUG_MAC80211("leave\n");
7215
7216}
7217
7218#define IWL_DELAY_NEXT_SCAN (HZ*2)
7219static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7220{
7221 int rc = 0;
7222 unsigned long flags;
7223 struct iwl_priv *priv = hw->priv;
7224
7225 IWL_DEBUG_MAC80211("enter\n");
7226
7227 spin_lock_irqsave(&priv->lock, flags);
7228
7229 if (!iwl_is_ready_rf(priv)) {
7230 rc = -EIO;
7231 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7232 goto out_unlock;
7233 }
7234
7235 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7236 rc = -EIO;
7237 IWL_ERROR("ERROR: APs don't scan\n");
7238 goto out_unlock;
7239 }
7240
7241 /* if we just finished scan ask for delay */
7242 if (priv->last_scan_jiffies &&
7243 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7244 jiffies)) {
7245 rc = -EAGAIN;
7246 goto out_unlock;
7247 }
7248 if (len) {
7249 IWL_DEBUG_SCAN("direct scan for "
7250 "%s [%d]\n ",
7251 iwl_escape_essid(ssid, len), (int)len);
7252
7253 priv->one_direct_scan = 1;
7254 priv->direct_ssid_len = (u8)
7255 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7256 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7257 }
7258
7259 rc = iwl_scan_initiate(priv);
7260
7261 IWL_DEBUG_MAC80211("leave\n");
7262
7263out_unlock:
7264 spin_unlock_irqrestore(&priv->lock, flags);
7265
7266 return rc;
7267}
7268
ea49c359 7269static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
b481de9c
ZY		 7270 const u8 *local_addr, const u8 *addr,
7271 struct ieee80211_key_conf *key)
7272{
7273 struct iwl_priv *priv = hw->priv;
7274 int rc = 0;
7275 u8 sta_id;
7276
7277 IWL_DEBUG_MAC80211("enter\n");
7278
7279 if (!iwl_param_hwcrypto) {
7280 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7281 return -EOPNOTSUPP;
7282 }
7283
7284 if (is_zero_ether_addr(addr))
7285 /* only support pairwise keys */
7286 return -EOPNOTSUPP;
7287
7288 sta_id = iwl_hw_find_station(priv, addr);
7289 if (sta_id == IWL_INVALID_STATION) {
0795af57
JP		 7290 DECLARE_MAC_BUF(mac);
7291
7292 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7293 print_mac(mac, addr));
b481de9c
ZY		 7294 return -EINVAL;
7295 }
7296
7297 mutex_lock(&priv->mutex);
7298
7299 switch (cmd) {
7300 case SET_KEY:
7301 rc = iwl_update_sta_key_info(priv, key, sta_id);
7302 if (!rc) {
7303 iwl_set_rxon_hwcrypto(priv, 1);
7304 iwl_commit_rxon(priv);
7305 key->hw_key_idx = sta_id;
7306 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7307 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7308 }
7309 break;
7310 case DISABLE_KEY:
7311 rc = iwl_clear_sta_key_info(priv, sta_id);
7312 if (!rc) {
7313 iwl_set_rxon_hwcrypto(priv, 0);
7314 iwl_commit_rxon(priv);
7315 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7316 }
7317 break;
7318 default:
7319 rc = -EINVAL;
7320 }
7321
7322 IWL_DEBUG_MAC80211("leave\n");
7323 mutex_unlock(&priv->mutex);
7324
7325 return rc;
7326}
7327
7328static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7329 const struct ieee80211_tx_queue_params *params)
7330{
7331 struct iwl_priv *priv = hw->priv;
7332#ifdef CONFIG_IWLWIFI_QOS
7333 unsigned long flags;
7334 int q;
7335#endif /* CONFIG_IWL_QOS */
7336
7337 IWL_DEBUG_MAC80211("enter\n");
7338
7339 if (!iwl_is_ready_rf(priv)) {
7340 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7341 return -EIO;
7342 }
7343
7344 if (queue >= AC_NUM) {
7345 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7346 return 0;
7347 }
7348
7349#ifdef CONFIG_IWLWIFI_QOS
7350 if (!priv->qos_data.qos_enable) {
7351 priv->qos_data.qos_active = 0;
7352 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7353 return 0;
7354 }
7355 q = AC_NUM - 1 - queue;
7356
7357 spin_lock_irqsave(&priv->lock, flags);
7358
7359 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7360 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7361 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7362 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7363 cpu_to_le16((params->burst_time * 100));
7364
7365 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7366 priv->qos_data.qos_active = 1;
7367
7368 spin_unlock_irqrestore(&priv->lock, flags);
7369
7370 mutex_lock(&priv->mutex);
7371 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7372 iwl_activate_qos(priv, 1);
7373 else if (priv->assoc_id && iwl_is_associated(priv))
7374 iwl_activate_qos(priv, 0);
7375
7376 mutex_unlock(&priv->mutex);
7377
7378#endif /*CONFIG_IWLWIFI_QOS */
7379
7380 IWL_DEBUG_MAC80211("leave\n");
7381 return 0;
7382}
7383
7384static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7385 struct ieee80211_tx_queue_stats *stats)
7386{
7387 struct iwl_priv *priv = hw->priv;
7388 int i, avail;
7389 struct iwl_tx_queue *txq;
7390 struct iwl_queue *q;
7391 unsigned long flags;
7392
7393 IWL_DEBUG_MAC80211("enter\n");
7394
7395 if (!iwl_is_ready_rf(priv)) {
7396 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7397 return -EIO;
7398 }
7399
7400 spin_lock_irqsave(&priv->lock, flags);
7401
7402 for (i = 0; i < AC_NUM; i++) {
7403 txq = &priv->txq[i];
7404 q = &txq->q;
7405 avail = iwl_queue_space(q);
7406
7407 stats->data[i].len = q->n_window - avail;
7408 stats->data[i].limit = q->n_window - q->high_mark;
7409 stats->data[i].count = q->n_window;
7410
7411 }
7412 spin_unlock_irqrestore(&priv->lock, flags);
7413
7414 IWL_DEBUG_MAC80211("leave\n");
7415
7416 return 0;
7417}
7418
7419static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7420 struct ieee80211_low_level_stats *stats)
7421{
7422 IWL_DEBUG_MAC80211("enter\n");
7423 IWL_DEBUG_MAC80211("leave\n");
7424
7425 return 0;
7426}
7427
7428static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7429{
7430 IWL_DEBUG_MAC80211("enter\n");
7431 IWL_DEBUG_MAC80211("leave\n");
7432
7433 return 0;
7434}
7435
7436static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7437{
7438 struct iwl_priv *priv = hw->priv;
7439 unsigned long flags;
7440
7441 mutex_lock(&priv->mutex);
7442 IWL_DEBUG_MAC80211("enter\n");
7443
7444#ifdef CONFIG_IWLWIFI_QOS
7445 iwl_reset_qos(priv);
7446#endif
7447 cancel_delayed_work(&priv->post_associate);
7448
7449 spin_lock_irqsave(&priv->lock, flags);
7450 priv->assoc_id = 0;
7451 priv->assoc_capability = 0;
7452 priv->call_post_assoc_from_beacon = 0;
7453
7454 /* new association get rid of ibss beacon skb */
7455 if (priv->ibss_beacon)
7456 dev_kfree_skb(priv->ibss_beacon);
7457
7458 priv->ibss_beacon = NULL;
7459
7460 priv->beacon_int = priv->hw->conf.beacon_int;
7461 priv->timestamp1 = 0;
7462 priv->timestamp0 = 0;
7463 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7464 priv->beacon_int = 0;
7465
7466 spin_unlock_irqrestore(&priv->lock, flags);
7467
7468 /* Per mac80211.h: This is only used in IBSS mode... */
7469 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7470 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7471 mutex_unlock(&priv->mutex);
7472 return;
7473 }
7474
7475 if (!iwl_is_ready_rf(priv)) {
7476 IWL_DEBUG_MAC80211("leave - not ready\n");
7477 mutex_unlock(&priv->mutex);
7478 return;
7479 }
7480
7481 priv->only_active_channel = 0;
7482
7483 iwl_set_rate(priv);
7484
7485 mutex_unlock(&priv->mutex);
7486
7487 IWL_DEBUG_MAC80211("leave\n");
7488
7489}
7490
7491static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7492 struct ieee80211_tx_control *control)
7493{
7494 struct iwl_priv *priv = hw->priv;
7495 unsigned long flags;
7496
7497 mutex_lock(&priv->mutex);
7498 IWL_DEBUG_MAC80211("enter\n");
7499
7500 if (!iwl_is_ready_rf(priv)) {
7501 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7502 mutex_unlock(&priv->mutex);
7503 return -EIO;
7504 }
7505
7506 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7507 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7508 mutex_unlock(&priv->mutex);
7509 return -EIO;
7510 }
7511
7512 spin_lock_irqsave(&priv->lock, flags);
7513
7514 if (priv->ibss_beacon)
7515 dev_kfree_skb(priv->ibss_beacon);
7516
7517 priv->ibss_beacon = skb;
7518
7519 priv->assoc_id = 0;
7520
7521 IWL_DEBUG_MAC80211("leave\n");
7522 spin_unlock_irqrestore(&priv->lock, flags);
7523
7524#ifdef CONFIG_IWLWIFI_QOS
7525 iwl_reset_qos(priv);
7526#endif
7527
7528 queue_work(priv->workqueue, &priv->post_associate.work);
7529
7530 mutex_unlock(&priv->mutex);
7531
7532 return 0;
7533}
7534
7535/*****************************************************************************
7536 *
7537 * sysfs attributes
7538 *
7539 *****************************************************************************/
7540
7541#ifdef CONFIG_IWLWIFI_DEBUG
7542
7543/*
7544 * The following adds a new attribute to the sysfs representation
7545 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7546 * used for controlling the debug level.
7547 *
7548 * See the level definitions in iwl for details.
7549 */
7550
7551static ssize_t show_debug_level(struct device_driver *d, char *buf)
7552{
7553 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7554}
7555static ssize_t store_debug_level(struct device_driver *d,
7556 const char *buf, size_t count)
7557{
7558 char *p = (char *)buf;
7559 u32 val;
7560
7561 val = simple_strtoul(p, &p, 0);
7562 if (p == buf)
7563 printk(KERN_INFO DRV_NAME
7564 ": %s is not in hex or decimal form.\n", buf);
7565 else
7566 iwl_debug_level = val;
7567
7568 return strnlen(buf, count);
7569}
7570
7571static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7572 show_debug_level, store_debug_level);
7573
7574#endif /* CONFIG_IWLWIFI_DEBUG */
7575
7576static ssize_t show_rf_kill(struct device *d,
7577 struct device_attribute *attr, char *buf)
7578{
7579 /*
7580 * 0 - RF kill not enabled
7581 * 1 - SW based RF kill active (sysfs)
7582 * 2 - HW based RF kill active
7583 * 3 - Both HW and SW based RF kill active
7584 */
7585 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7586 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7587 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7588
7589 return sprintf(buf, "%i\n", val);
7590}
7591
7592static ssize_t store_rf_kill(struct device *d,
7593 struct device_attribute *attr,
7594 const char *buf, size_t count)
7595{
7596 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7597
7598 mutex_lock(&priv->mutex);
7599 iwl_radio_kill_sw(priv, buf[0] == '1');
7600 mutex_unlock(&priv->mutex);
7601
7602 return count;
7603}
7604
7605static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7606
7607static ssize_t show_temperature(struct device *d,
7608 struct device_attribute *attr, char *buf)
7609{
7610 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7611
7612 if (!iwl_is_alive(priv))
7613 return -EAGAIN;
7614
7615 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7616}
7617
7618static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7619
7620static ssize_t show_rs_window(struct device *d,
7621 struct device_attribute *attr,
7622 char *buf)
7623{
7624 struct iwl_priv *priv = d->driver_data;
7625 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7626}
7627static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7628
7629static ssize_t show_tx_power(struct device *d,
7630 struct device_attribute *attr, char *buf)
7631{
7632 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7633 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7634}
7635
7636static ssize_t store_tx_power(struct device *d,
7637 struct device_attribute *attr,
7638 const char *buf, size_t count)
7639{
7640 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7641 char *p = (char *)buf;
7642 u32 val;
7643
7644 val = simple_strtoul(p, &p, 10);
7645 if (p == buf)
7646 printk(KERN_INFO DRV_NAME
7647 ": %s is not in decimal form.\n", buf);
7648 else
7649 iwl_hw_reg_set_txpower(priv, val);
7650
7651 return count;
7652}
7653
7654static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7655
7656static ssize_t show_flags(struct device *d,
7657 struct device_attribute *attr, char *buf)
7658{
7659 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7660
7661 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7662}
7663
7664static ssize_t store_flags(struct device *d,
7665 struct device_attribute *attr,
7666 const char *buf, size_t count)
7667{
7668 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7669 u32 flags = simple_strtoul(buf, NULL, 0);
7670
7671 mutex_lock(&priv->mutex);
7672 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7673 /* Cancel any currently running scans... */
7674 if (iwl_scan_cancel_timeout(priv, 100))
7675 IWL_WARNING("Could not cancel scan.\n");
7676 else {
7677 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7678 flags);
7679 priv->staging_rxon.flags = cpu_to_le32(flags);
7680 iwl_commit_rxon(priv);
7681 }
7682 }
7683 mutex_unlock(&priv->mutex);
7684
7685 return count;
7686}
7687
7688static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7689
7690static ssize_t show_filter_flags(struct device *d,
7691 struct device_attribute *attr, char *buf)
7692{
7693 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7694
7695 return sprintf(buf, "0x%04X\n",
7696 le32_to_cpu(priv->active_rxon.filter_flags));
7697}
7698
7699static ssize_t store_filter_flags(struct device *d,
7700 struct device_attribute *attr,
7701 const char *buf, size_t count)
7702{
7703 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7704 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7705
7706 mutex_lock(&priv->mutex);
7707 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7708 /* Cancel any currently running scans... */
7709 if (iwl_scan_cancel_timeout(priv, 100))
7710 IWL_WARNING("Could not cancel scan.\n");
7711 else {
7712 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7713 "0x%04X\n", filter_flags);
7714 priv->staging_rxon.filter_flags =
7715 cpu_to_le32(filter_flags);
7716 iwl_commit_rxon(priv);
7717 }
7718 }
7719 mutex_unlock(&priv->mutex);
7720
7721 return count;
7722}
7723
7724static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7725 store_filter_flags);
7726
7727static ssize_t show_tune(struct device *d,
7728 struct device_attribute *attr, char *buf)
7729{
7730 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7731
7732 return sprintf(buf, "0x%04X\n",
7733 (priv->phymode << 8) |
7734 le16_to_cpu(priv->active_rxon.channel));
7735}
7736
7737static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7738
7739static ssize_t store_tune(struct device *d,
7740 struct device_attribute *attr,
7741 const char *buf, size_t count)
7742{
7743 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7744 char *p = (char *)buf;
7745 u16 tune = simple_strtoul(p, &p, 0);
7746 u8 phymode = (tune >> 8) & 0xff;
7747 u16 channel = tune & 0xff;
7748
7749 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7750
7751 mutex_lock(&priv->mutex);
7752 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7753 (priv->phymode != phymode)) {
7754 const struct iwl_channel_info *ch_info;
7755
7756 ch_info = iwl_get_channel_info(priv, phymode, channel);
7757 if (!ch_info) {
7758 IWL_WARNING("Requested invalid phymode/channel "
7759 "combination: %d %d\n", phymode, channel);
7760 mutex_unlock(&priv->mutex);
7761 return -EINVAL;
7762 }
7763
7764 /* Cancel any currently running scans... */
7765 if (iwl_scan_cancel_timeout(priv, 100))
7766 IWL_WARNING("Could not cancel scan.\n");
7767 else {
7768 IWL_DEBUG_INFO("Committing phymode and "
7769 "rxon.channel = %d %d\n",
7770 phymode, channel);
7771
7772 iwl_set_rxon_channel(priv, phymode, channel);
7773 iwl_set_flags_for_phymode(priv, phymode);
7774
7775 iwl_set_rate(priv);
7776 iwl_commit_rxon(priv);
7777 }
7778 }
7779 mutex_unlock(&priv->mutex);
7780
7781 return count;
7782}
7783
7784static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7785
7786#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7787
7788static ssize_t show_measurement(struct device *d,
7789 struct device_attribute *attr, char *buf)
7790{
7791 struct iwl_priv *priv = dev_get_drvdata(d);
7792 struct iwl_spectrum_notification measure_report;
7793 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7794 u8 *data = (u8 *) & measure_report;
7795 unsigned long flags;
7796
7797 spin_lock_irqsave(&priv->lock, flags);
7798 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7799 spin_unlock_irqrestore(&priv->lock, flags);
7800 return 0;
7801 }
7802 memcpy(&measure_report, &priv->measure_report, size);
7803 priv->measurement_status = 0;
7804 spin_unlock_irqrestore(&priv->lock, flags);
7805
7806 while (size && (PAGE_SIZE - len)) {
7807 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7808 PAGE_SIZE - len, 1);
7809 len = strlen(buf);
7810 if (PAGE_SIZE - len)
7811 buf[len++] = '\n';
7812
7813 ofs += 16;
7814 size -= min(size, 16U);
7815 }
7816
7817 return len;
7818}
7819
7820static ssize_t store_measurement(struct device *d,
7821 struct device_attribute *attr,
7822 const char *buf, size_t count)
7823{
7824 struct iwl_priv *priv = dev_get_drvdata(d);
7825 struct ieee80211_measurement_params params = {
7826 .channel = le16_to_cpu(priv->active_rxon.channel),
7827 .start_time = cpu_to_le64(priv->last_tsf),
7828 .duration = cpu_to_le16(1),
7829 };
7830 u8 type = IWL_MEASURE_BASIC;
7831 u8 buffer[32];
7832 u8 channel;
7833
7834 if (count) {
7835 char *p = buffer;
7836 strncpy(buffer, buf, min(sizeof(buffer), count));
7837 channel = simple_strtoul(p, NULL, 0);
7838 if (channel)
7839 params.channel = channel;
7840
7841 p = buffer;
7842 while (*p && *p != ' ')
7843 p++;
7844 if (*p)
7845 type = simple_strtoul(p + 1, NULL, 0);
7846 }
7847
7848 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7849 "channel %d (for '%s')\n", type, params.channel, buf);
7850 iwl_get_measurement(priv, &params, type);
7851
7852 return count;
7853}
7854
7855static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7856 show_measurement, store_measurement);
7857#endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7858
7859static ssize_t show_rate(struct device *d,
7860 struct device_attribute *attr, char *buf)
7861{
7862 struct iwl_priv *priv = dev_get_drvdata(d);
7863 unsigned long flags;
7864 int i;
7865
7866 spin_lock_irqsave(&priv->sta_lock, flags);
7867 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7868 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7869 else
7870 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7871 spin_unlock_irqrestore(&priv->sta_lock, flags);
7872
7873 i = iwl_rate_index_from_plcp(i);
7874 if (i == -1)
7875 return sprintf(buf, "0\n");
7876
7877 return sprintf(buf, "%d%s\n",
7878 (iwl_rates[i].ieee >> 1),
7879 (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7880}
7881
7882static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7883
7884static ssize_t store_retry_rate(struct device *d,
7885 struct device_attribute *attr,
7886 const char *buf, size_t count)
7887{
7888 struct iwl_priv *priv = dev_get_drvdata(d);
7889
7890 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7891 if (priv->retry_rate <= 0)
7892 priv->retry_rate = 1;
7893
7894 return count;
7895}
7896
7897static ssize_t show_retry_rate(struct device *d,
7898 struct device_attribute *attr, char *buf)
7899{
7900 struct iwl_priv *priv = dev_get_drvdata(d);
7901 return sprintf(buf, "%d", priv->retry_rate);
7902}
7903
7904static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7905 store_retry_rate);
7906
7907static ssize_t store_power_level(struct device *d,
7908 struct device_attribute *attr,
7909 const char *buf, size_t count)
7910{
7911 struct iwl_priv *priv = dev_get_drvdata(d);
7912 int rc;
7913 int mode;
7914
7915 mode = simple_strtoul(buf, NULL, 0);
7916 mutex_lock(&priv->mutex);
7917
7918 if (!iwl_is_ready(priv)) {
7919 rc = -EAGAIN;
7920 goto out;
7921 }
7922
7923 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7924 mode = IWL_POWER_AC;
7925 else
7926 mode |= IWL_POWER_ENABLED;
7927
7928 if (mode != priv->power_mode) {
7929 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7930 if (rc) {
7931 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7932 goto out;
7933 }
7934 priv->power_mode = mode;
7935 }
7936
7937 rc = count;
7938
7939 out:
7940 mutex_unlock(&priv->mutex);
7941 return rc;
7942}
7943
7944#define MAX_WX_STRING 80
7945
7946/* Values are in microsecond */
7947static const s32 timeout_duration[] = {
7948 350000,
7949 250000,
7950 75000,
7951 37000,
7952 25000,
7953};
7954static const s32 period_duration[] = {
7955 400000,
7956 700000,
7957 1000000,
7958 1000000,
7959 1000000
7960};
7961
7962static ssize_t show_power_level(struct device *d,
7963 struct device_attribute *attr, char *buf)
7964{
7965 struct iwl_priv *priv = dev_get_drvdata(d);
7966 int level = IWL_POWER_LEVEL(priv->power_mode);
7967 char *p = buf;
7968
7969 p += sprintf(p, "%d ", level);
7970 switch (level) {
7971 case IWL_POWER_MODE_CAM:
7972 case IWL_POWER_AC:
7973 p += sprintf(p, "(AC)");
7974 break;
7975 case IWL_POWER_BATTERY:
7976 p += sprintf(p, "(BATTERY)");
7977 break;
7978 default:
7979 p += sprintf(p,
7980 "(Timeout %dms, Period %dms)",
7981 timeout_duration[level - 1] / 1000,
7982 period_duration[level - 1] / 1000);
7983 }
7984
7985 if (!(priv->power_mode & IWL_POWER_ENABLED))
7986 p += sprintf(p, " OFF\n");
7987 else
7988 p += sprintf(p, " \n");
7989
7990 return (p - buf + 1);
7991
7992}
7993
7994static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7995 store_power_level);
7996
7997static ssize_t show_channels(struct device *d,
7998 struct device_attribute *attr, char *buf)
7999{
8000 struct iwl_priv *priv = dev_get_drvdata(d);
8001 int len = 0, i;
8002 struct ieee80211_channel *channels = NULL;
8003 const struct ieee80211_hw_mode *hw_mode = NULL;
8004 int count = 0;
8005
8006 if (!iwl_is_ready(priv))
8007 return -EAGAIN;
8008
8009 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8010 if (!hw_mode)
8011 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8012 if (hw_mode) {
8013 channels = hw_mode->channels;
8014 count = hw_mode->num_channels;
8015 }
8016
8017 len +=
8018 sprintf(&buf[len],
8019 "Displaying %d channels in 2.4GHz band "
8020 "(802.11bg):\n", count);
8021
8022 for (i = 0; i < count; i++)
8023 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8024 channels[i].chan,
8025 channels[i].power_level,
8026 channels[i].
8027 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8028 " (IEEE 802.11h required)" : "",
8029 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8030 || (channels[i].
8031 flag &
8032 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8033 ", IBSS",
8034 channels[i].
8035 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8036 "active/passive" : "passive only");
8037
8038 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8039 if (hw_mode) {
8040 channels = hw_mode->channels;
8041 count = hw_mode->num_channels;
8042 } else {
8043 channels = NULL;
8044 count = 0;
8045 }
8046
8047 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8048 "(802.11a):\n", count);
8049
8050 for (i = 0; i < count; i++)
8051 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8052 channels[i].chan,
8053 channels[i].power_level,
8054 channels[i].
8055 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8056 " (IEEE 802.11h required)" : "",
8057 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8058 || (channels[i].
8059 flag &
8060 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8061 ", IBSS",
8062 channels[i].
8063 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8064 "active/passive" : "passive only");
8065
8066 return len;
8067}
8068
8069static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8070
8071static ssize_t show_statistics(struct device *d,
8072 struct device_attribute *attr, char *buf)
8073{
8074 struct iwl_priv *priv = dev_get_drvdata(d);
8075 u32 size = sizeof(struct iwl_notif_statistics);
8076 u32 len = 0, ofs = 0;
8077 u8 *data = (u8 *) & priv->statistics;
8078 int rc = 0;
8079
8080 if (!iwl_is_alive(priv))
8081 return -EAGAIN;
8082
8083 mutex_lock(&priv->mutex);
8084 rc = iwl_send_statistics_request(priv);
8085 mutex_unlock(&priv->mutex);
8086
8087 if (rc) {
8088 len = sprintf(buf,
8089 "Error sending statistics request: 0x%08X\n", rc);
8090 return len;
8091 }
8092
8093 while (size && (PAGE_SIZE - len)) {
8094 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8095 PAGE_SIZE - len, 1);
8096 len = strlen(buf);
8097 if (PAGE_SIZE - len)
8098 buf[len++] = '\n';
8099
8100 ofs += 16;
8101 size -= min(size, 16U);
8102 }
8103
8104 return len;
8105}
8106
8107static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8108
8109static ssize_t show_antenna(struct device *d,
8110 struct device_attribute *attr, char *buf)
8111{
8112 struct iwl_priv *priv = dev_get_drvdata(d);
8113
8114 if (!iwl_is_alive(priv))
8115 return -EAGAIN;
8116
8117 return sprintf(buf, "%d\n", priv->antenna);
8118}
8119
8120static ssize_t store_antenna(struct device *d,
8121 struct device_attribute *attr,
8122 const char *buf, size_t count)
8123{
8124 int ant;
8125 struct iwl_priv *priv = dev_get_drvdata(d);
8126
8127 if (count == 0)
8128 return 0;
8129
8130 if (sscanf(buf, "%1i", &ant) != 1) {
8131 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8132 return count;
8133 }
8134
8135 if ((ant >= 0) && (ant <= 2)) {
8136 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8137 priv->antenna = (enum iwl_antenna)ant;
8138 } else
8139 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8140
8141
8142 return count;
8143}
8144
8145static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8146
8147static ssize_t show_status(struct device *d,
8148 struct device_attribute *attr, char *buf)
8149{
8150 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8151 if (!iwl_is_alive(priv))
8152 return -EAGAIN;
8153 return sprintf(buf, "0x%08x\n", (int)priv->status);
8154}
8155
8156static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8157
8158static ssize_t dump_error_log(struct device *d,
8159 struct device_attribute *attr,
8160 const char *buf, size_t count)
8161{
8162 char *p = (char *)buf;
8163
8164 if (p[0] == '1')
8165 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8166
8167 return strnlen(buf, count);
8168}
8169
8170static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8171
8172static ssize_t dump_event_log(struct device *d,
8173 struct device_attribute *attr,
8174 const char *buf, size_t count)
8175{
8176 char *p = (char *)buf;
8177
8178 if (p[0] == '1')
8179 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8180
8181 return strnlen(buf, count);
8182}
8183
8184static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8185
8186/*****************************************************************************
8187 *
8188 * driver setup and teardown
8189 *
8190 *****************************************************************************/
8191
8192static void iwl_setup_deferred_work(struct iwl_priv *priv)
8193{
8194 priv->workqueue = create_workqueue(DRV_NAME);
8195
8196 init_waitqueue_head(&priv->wait_command_queue);
8197
8198 INIT_WORK(&priv->up, iwl_bg_up);
8199 INIT_WORK(&priv->restart, iwl_bg_restart);
8200 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8201 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8202 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8203 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8204 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8205 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8206 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8207 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8208 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8209 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8210
8211 iwl_hw_setup_deferred_work(priv);
8212
8213 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8214 iwl_irq_tasklet, (unsigned long)priv);
8215}
8216
8217static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8218{
8219 iwl_hw_cancel_deferred_work(priv);
8220
8221 cancel_delayed_work(&priv->scan_check);
8222 cancel_delayed_work(&priv->alive_start);
8223 cancel_delayed_work(&priv->post_associate);
8224 cancel_work_sync(&priv->beacon_update);
8225}
8226
8227static struct attribute *iwl_sysfs_entries[] = {
8228 &dev_attr_antenna.attr,
8229 &dev_attr_channels.attr,
8230 &dev_attr_dump_errors.attr,
8231 &dev_attr_dump_events.attr,
8232 &dev_attr_flags.attr,
8233 &dev_attr_filter_flags.attr,
8234#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8235 &dev_attr_measurement.attr,
8236#endif
8237 &dev_attr_power_level.attr,
8238 &dev_attr_rate.attr,
8239 &dev_attr_retry_rate.attr,
8240 &dev_attr_rf_kill.attr,
8241 &dev_attr_rs_window.attr,
8242 &dev_attr_statistics.attr,
8243 &dev_attr_status.attr,
8244 &dev_attr_temperature.attr,
8245 &dev_attr_tune.attr,
8246 &dev_attr_tx_power.attr,
8247
8248 NULL
8249};
8250
8251static struct attribute_group iwl_attribute_group = {
8252 .name = NULL, /* put in device directory */
8253 .attrs = iwl_sysfs_entries,
8254};
8255
8256static struct ieee80211_ops iwl_hw_ops = {
8257 .tx = iwl_mac_tx,
4150c572 8258 .start = iwl_mac_start,
b481de9c
ZY		 8259 .stop = iwl_mac_stop,
8260 .add_interface = iwl_mac_add_interface,
8261 .remove_interface = iwl_mac_remove_interface,
8262 .config = iwl_mac_config,
8263 .config_interface = iwl_mac_config_interface,
4150c572 8264 .configure_filter = iwl_configure_filter,
b481de9c
ZY		 8265 .set_key = iwl_mac_set_key,
8266 .get_stats = iwl_mac_get_stats,
8267 .get_tx_stats = iwl_mac_get_tx_stats,
8268 .conf_tx = iwl_mac_conf_tx,
8269 .get_tsf = iwl_mac_get_tsf,
8270 .reset_tsf = iwl_mac_reset_tsf,
8271 .beacon_update = iwl_mac_beacon_update,
8272 .hw_scan = iwl_mac_hw_scan
8273};
8274
8275static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8276{
8277 int err = 0;
8278 u32 pci_id;
8279 struct iwl_priv *priv;
8280 struct ieee80211_hw *hw;
8281 int i;
8282
8283 if (iwl_param_disable_hw_scan) {
8284 IWL_DEBUG_INFO("Disabling hw_scan\n");
8285 iwl_hw_ops.hw_scan = NULL;
8286 }
8287
8288 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8289 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8290 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8291 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8292 err = -EINVAL;
8293 goto out;
8294 }
8295
8296 /* mac80211 allocates memory for this device instance, including
8297 * space for this driver's private structure */
8298 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8299 if (hw == NULL) {
8300 IWL_ERROR("Can not allocate network device\n");
8301 err = -ENOMEM;
8302 goto out;
8303 }
8304 SET_IEEE80211_DEV(hw, &pdev->dev);
8305
8306 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8307 priv = hw->priv;
8308 priv->hw = hw;
8309
8310 priv->pci_dev = pdev;
8311 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8312#ifdef CONFIG_IWLWIFI_DEBUG
8313 iwl_debug_level = iwl_param_debug;
8314 atomic_set(&priv->restrict_refcnt, 0);
8315#endif
8316 priv->retry_rate = 1;
8317
8318 priv->ibss_beacon = NULL;
8319
8320 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8321 * the range of signal quality values that we'll provide.
8322 * Negative values for level/noise indicate that we'll provide dBm.
8323 * For WE, at least, non-0 values here *enable* display of values
8324 * in app (iwconfig). */
8325 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8326 hw->max_noise = -20; /* noise level, negative indicates dBm */
8327 hw->max_signal = 100; /* link quality indication (%) */
8328
8329 /* Tell mac80211 our Tx characteristics */
8330 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8331
8332 hw->queues = 4;
8333
8334 spin_lock_init(&priv->lock);
8335 spin_lock_init(&priv->power_data.lock);
8336 spin_lock_init(&priv->sta_lock);
8337 spin_lock_init(&priv->hcmd_lock);
8338
8339 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8340 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8341
8342 INIT_LIST_HEAD(&priv->free_frames);
8343
8344 mutex_init(&priv->mutex);
8345 if (pci_enable_device(pdev)) {
8346 err = -ENODEV;
8347 goto out_ieee80211_free_hw;
8348 }
8349
8350 pci_set_master(pdev);
8351
8352 iwl_clear_stations_table(priv);
8353
8354 priv->data_retry_limit = -1;
8355 priv->ieee_channels = NULL;
8356 priv->ieee_rates = NULL;
8357 priv->phymode = -1;
8358
8359 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8360 if (!err)
8361 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8362 if (err) {
8363 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8364 goto out_pci_disable_device;
8365 }
8366
8367 pci_set_drvdata(pdev, priv);
8368 err = pci_request_regions(pdev, DRV_NAME);
8369 if (err)
8370 goto out_pci_disable_device;
8371 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8372 * PCI Tx retries from interfering with C3 CPU state */
8373 pci_write_config_byte(pdev, 0x41, 0x00);
8374 priv->hw_base = pci_iomap(pdev, 0, 0);
8375 if (!priv->hw_base) {
8376 err = -ENODEV;
8377 goto out_pci_release_regions;
8378 }
8379
8380 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8381 (unsigned long long) pci_resource_len(pdev, 0));
8382 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8383
8384 /* Initialize module parameter values here */
8385
8386 if (iwl_param_disable) {
8387 set_bit(STATUS_RF_KILL_SW, &priv->status);
8388 IWL_DEBUG_INFO("Radio disabled.\n");
8389 }
8390
8391 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8392
8393 pci_id =
8394 (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8395
8396 switch (pci_id) {
8397 case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
8398 case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
8399 case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
8400 case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
8401 priv->is_abg = 0;
8402 break;
8403
8404 /*
8405 * Rest are assumed ABG SKU -- if this is not the
8406 * case then the card will get the wrong 'Detected'
8407 * line in the kernel log however the code that
8408 * initializes the GEO table will detect no A-band
8409 * channels and remove the is_abg mask.
8410 */
8411 default:
8412 priv->is_abg = 1;
8413 break;
8414 }
8415
8416 printk(KERN_INFO DRV_NAME
8417 ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8418 priv->is_abg ? "A" : "");
8419
8420 /* Device-specific setup */
8421 if (iwl_hw_set_hw_setting(priv)) {
8422 IWL_ERROR("failed to set hw settings\n");
8423 mutex_unlock(&priv->mutex);
8424 goto out_iounmap;
8425 }
8426
8427#ifdef CONFIG_IWLWIFI_QOS
8428 if (iwl_param_qos_enable)
8429 priv->qos_data.qos_enable = 1;
8430
8431 iwl_reset_qos(priv);
8432
8433 priv->qos_data.qos_active = 0;
8434 priv->qos_data.qos_cap.val = 0;
8435#endif /* CONFIG_IWLWIFI_QOS */
8436
8437 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8438 iwl_setup_deferred_work(priv);
8439 iwl_setup_rx_handlers(priv);
8440
8441 priv->rates_mask = IWL_RATES_MASK;
8442 /* If power management is turned on, default to AC mode */
8443 priv->power_mode = IWL_POWER_AC;
8444 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8445
8446 pci_enable_msi(pdev);
8447
8448 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8449 if (err) {
8450 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8451 goto out_disable_msi;
8452 }
8453
8454 mutex_lock(&priv->mutex);
8455
8456 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8457 if (err) {
8458 IWL_ERROR("failed to create sysfs device attributes\n");
8459 mutex_unlock(&priv->mutex);
8460 goto out_release_irq;
8461 }
8462
8463 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8464 * ucode filename and max sizes are card-specific. */
8465 err = iwl_read_ucode(priv);
8466 if (err) {
8467 IWL_ERROR("Could not read microcode: %d\n", err);
8468 mutex_unlock(&priv->mutex);
8469 goto out_pci_alloc;
8470 }
8471
8472 mutex_unlock(&priv->mutex);
8473
8474 IWL_DEBUG_INFO("Queing UP work.\n");
8475
8476 queue_work(priv->workqueue, &priv->up);
8477
8478 return 0;
8479
8480 out_pci_alloc:
8481 iwl_dealloc_ucode_pci(priv);
8482
8483 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8484
8485 out_release_irq:
8486 free_irq(pdev->irq, priv);
8487
8488 out_disable_msi:
8489 pci_disable_msi(pdev);
8490 destroy_workqueue(priv->workqueue);
8491 priv->workqueue = NULL;
8492 iwl_unset_hw_setting(priv);
8493
8494 out_iounmap:
8495 pci_iounmap(pdev, priv->hw_base);
8496 out_pci_release_regions:
8497 pci_release_regions(pdev);
8498 out_pci_disable_device:
8499 pci_disable_device(pdev);
8500 pci_set_drvdata(pdev, NULL);
8501 out_ieee80211_free_hw:
8502 ieee80211_free_hw(priv->hw);
8503 out:
8504 return err;
8505}
8506
8507static void iwl_pci_remove(struct pci_dev *pdev)
8508{
8509 struct iwl_priv *priv = pci_get_drvdata(pdev);
8510 struct list_head *p, *q;
8511 int i;
8512
8513 if (!priv)
8514 return;
8515
8516 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8517
8518 mutex_lock(&priv->mutex);
8519 set_bit(STATUS_EXIT_PENDING, &priv->status);
8520 __iwl_down(priv);
8521 mutex_unlock(&priv->mutex);
8522
8523 /* Free MAC hash list for ADHOC */
8524 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8525 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8526 list_del(p);
8527 kfree(list_entry(p, struct iwl_ibss_seq, list));
8528 }
8529 }
8530
8531 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8532
8533 iwl_dealloc_ucode_pci(priv);
8534
8535 if (priv->rxq.bd)
8536 iwl_rx_queue_free(priv, &priv->rxq);
8537 iwl_hw_txq_ctx_free(priv);
8538
8539 iwl_unset_hw_setting(priv);
8540 iwl_clear_stations_table(priv);
8541
8542 if (priv->mac80211_registered) {
8543 ieee80211_unregister_hw(priv->hw);
8544 iwl_rate_control_unregister(priv->hw);
8545 }
8546
8547 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8548 * priv->workqueue... so we can't take down the workqueue
8549 * until now... */
8550 destroy_workqueue(priv->workqueue);
8551 priv->workqueue = NULL;
8552
8553 free_irq(pdev->irq, priv);
8554 pci_disable_msi(pdev);
8555 pci_iounmap(pdev, priv->hw_base);
8556 pci_release_regions(pdev);
8557 pci_disable_device(pdev);
8558 pci_set_drvdata(pdev, NULL);
8559
8560 kfree(priv->channel_info);
8561
8562 kfree(priv->ieee_channels);
8563 kfree(priv->ieee_rates);
8564
8565 if (priv->ibss_beacon)
8566 dev_kfree_skb(priv->ibss_beacon);
8567
8568 ieee80211_free_hw(priv->hw);
8569}
8570
8571#ifdef CONFIG_PM
8572
8573static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8574{
8575 struct iwl_priv *priv = pci_get_drvdata(pdev);
8576
8577 mutex_lock(&priv->mutex);
8578
8579 set_bit(STATUS_IN_SUSPEND, &priv->status);
8580
8581 /* Take down the device; powers it off, etc. */
8582 __iwl_down(priv);
8583
8584 if (priv->mac80211_registered)
8585 ieee80211_stop_queues(priv->hw);
8586
8587 pci_save_state(pdev);
8588 pci_disable_device(pdev);
8589 pci_set_power_state(pdev, PCI_D3hot);
8590
8591 mutex_unlock(&priv->mutex);
8592
8593 return 0;
8594}
8595
8596static void iwl_resume(struct iwl_priv *priv)
8597{
8598 unsigned long flags;
8599
8600 /* The following it a temporary work around due to the
8601 * suspend / resume not fully initializing the NIC correctly.
8602 * Without all of the following, resume will not attempt to take
8603 * down the NIC (it shouldn't really need to) and will just try
8604 * and bring the NIC back up. However that fails during the
8605 * ucode verification process. This then causes iwl_down to be
8606 * called *after* iwl_hw_nic_init() has succeeded -- which
8607 * then lets the next init sequence succeed. So, we've
8608 * replicated all of that NIC init code here... */
8609
8610 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8611
8612 iwl_hw_nic_init(priv);
8613
8614 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8615 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8616 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8617 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8618 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8619 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8620
8621 /* tell the device to stop sending interrupts */
8622 iwl_disable_interrupts(priv);
8623
8624 spin_lock_irqsave(&priv->lock, flags);
8625 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8626
8627 if (!iwl_grab_restricted_access(priv)) {
8628 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8629 APMG_CLK_VAL_DMA_CLK_RQT);
8630 iwl_release_restricted_access(priv);
8631 }
8632 spin_unlock_irqrestore(&priv->lock, flags);
8633
8634 udelay(5);
8635
8636 iwl_hw_nic_reset(priv);
8637
8638 /* Bring the device back up */
8639 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8640 queue_work(priv->workqueue, &priv->up);
8641}
8642
8643static int iwl_pci_resume(struct pci_dev *pdev)
8644{
8645 struct iwl_priv *priv = pci_get_drvdata(pdev);
8646 int err;
8647
8648 printk(KERN_INFO "Coming out of suspend...\n");
8649
8650 mutex_lock(&priv->mutex);
8651
8652 pci_set_power_state(pdev, PCI_D0);
8653 err = pci_enable_device(pdev);
8654 pci_restore_state(pdev);
8655
8656 /*
8657 * Suspend/Resume resets the PCI configuration space, so we have to
8658 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8659 * from interfering with C3 CPU state. pci_restore_state won't help
8660 * here since it only restores the first 64 bytes pci config header.
8661 */
8662 pci_write_config_byte(pdev, 0x41, 0x00);
8663
8664 iwl_resume(priv);
8665 mutex_unlock(&priv->mutex);
8666
8667 return 0;
8668}
8669
8670#endif /* CONFIG_PM */
8671
8672/*****************************************************************************
8673 *
8674 * driver and module entry point
8675 *
8676 *****************************************************************************/
8677
8678static struct pci_driver iwl_driver = {
8679 .name = DRV_NAME,
8680 .id_table = iwl_hw_card_ids,
8681 .probe = iwl_pci_probe,
8682 .remove = __devexit_p(iwl_pci_remove),
8683#ifdef CONFIG_PM
8684 .suspend = iwl_pci_suspend,
8685 .resume = iwl_pci_resume,
8686#endif
8687};
8688
8689static int __init iwl_init(void)
8690{
8691
8692 int ret;
8693 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8694 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8695 ret = pci_register_driver(&iwl_driver);
8696 if (ret) {
8697 IWL_ERROR("Unable to initialize PCI module\n");
8698 return ret;
8699 }
8700#ifdef CONFIG_IWLWIFI_DEBUG
8701 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8702 if (ret) {
8703 IWL_ERROR("Unable to create driver sysfs file\n");
8704 pci_unregister_driver(&iwl_driver);
8705 return ret;
8706 }
8707#endif
8708
8709 return ret;
8710}
8711
8712static void __exit iwl_exit(void)
8713{
8714#ifdef CONFIG_IWLWIFI_DEBUG
8715 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8716#endif
8717 pci_unregister_driver(&iwl_driver);
8718}
8719
8720module_param_named(antenna, iwl_param_antenna, int, 0444);
8721MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8722module_param_named(disable, iwl_param_disable, int, 0444);
8723MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8724module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8725MODULE_PARM_DESC(hwcrypto,
8726 "using hardware crypto engine (default 0 [software])\n");
8727module_param_named(debug, iwl_param_debug, int, 0444);
8728MODULE_PARM_DESC(debug, "debug output mask");
8729module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8730MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8731
8732module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8733MODULE_PARM_DESC(queues_num, "number of hw queues.");
8734
8735/* QoS */
8736module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8737MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8738
8739module_exit(iwl_exit);
8740module_init(iwl_init);
Linux kernel - Deliverables
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