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[IWLWIFI]: add iwlwifi wireless drivers
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / iwlwifi / iwl4965-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
61#include "iwlwifi.h"
62#include "iwl-4965.h"
63#include "iwl-helpers.h"
64
65#ifdef CONFIG_IWLWIFI_DEBUG
66u32 iwl_debug_level;
67#endif
68
69/******************************************************************************
70 *
71 * module boiler plate
72 *
73 ******************************************************************************/
74
75/* module parameters */
76int iwl_param_disable_hw_scan;
77int iwl_param_debug;
78int iwl_param_disable; /* def: enable radio */
79int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
80int iwl_param_hwcrypto; /* def: using software encryption */
81int iwl_param_qos_enable = 1;
82int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
83
84/*
85 * module name, copyright, version, etc.
86 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
87 */
88
89#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
90
91#ifdef CONFIG_IWLWIFI_DEBUG
92#define VD "d"
93#else
94#define VD
95#endif
96
97#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
98#define VS "s"
99#else
100#define VS
101#endif
102
103#define IWLWIFI_VERSION "0.1.15k" VD VS
104#define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
105#define DRV_VERSION IWLWIFI_VERSION
106
107/* Change firmware file name, using "-" and incrementing number,
108 * *only* when uCode interface or architecture changes so that it
109 * is not compatible with earlier drivers.
110 * This number will also appear in << 8 position of 1st dword of uCode file */
111#define IWL4965_UCODE_API "-1"
112
113MODULE_DESCRIPTION(DRV_DESCRIPTION);
114MODULE_VERSION(DRV_VERSION);
115MODULE_AUTHOR(DRV_COPYRIGHT);
116MODULE_LICENSE("GPL");
117
118__le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
119{
120 u16 fc = le16_to_cpu(hdr->frame_control);
121 int hdr_len = ieee80211_get_hdrlen(fc);
122
123 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
124 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
125 return NULL;
126}
127
128static const struct ieee80211_hw_mode *iwl_get_hw_mode(
129 struct iwl_priv *priv, int mode)
130{
131 int i;
132
133 for (i = 0; i < 3; i++)
134 if (priv->modes[i].mode == mode)
135 return &priv->modes[i];
136
137 return NULL;
138}
139
140static int iwl_is_empty_essid(const char *essid, int essid_len)
141{
142 /* Single white space is for Linksys APs */
143 if (essid_len == 1 && essid[0] == ' ')
144 return 1;
145
146 /* Otherwise, if the entire essid is 0, we assume it is hidden */
147 while (essid_len) {
148 essid_len--;
149 if (essid[essid_len] != '\0')
150 return 0;
151 }
152
153 return 1;
154}
155
156static const char *iwl_escape_essid(const char *essid, u8 essid_len)
157{
158 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
159 const char *s = essid;
160 char *d = escaped;
161
162 if (iwl_is_empty_essid(essid, essid_len)) {
163 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
164 return escaped;
165 }
166
167 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
168 while (essid_len--) {
169 if (*s == '\0') {
170 *d++ = '\\';
171 *d++ = '0';
172 s++;
173 } else
174 *d++ = *s++;
175 }
176 *d = '\0';
177 return escaped;
178}
179
180static void iwl_print_hex_dump(int level, void *p, u32 len)
181{
182#ifdef CONFIG_IWLWIFI_DEBUG
183 if (!(iwl_debug_level & level))
184 return;
185
186 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
187 p, len, 1);
188#endif
189}
190
191/*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
192 * DMA services
193 *
194 * Theory of operation
195 *
196 * A queue is a circular buffers with 'Read' and 'Write' pointers.
197 * 2 empty entries always kept in the buffer to protect from overflow.
198 *
199 * For Tx queue, there are low mark and high mark limits. If, after queuing
200 * the packet for Tx, free space become < low mark, Tx queue stopped. When
201 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
202 * Tx queue resumed.
203 *
204 * The IPW operates with six queues, one receive queue in the device's
205 * sram, one transmit queue for sending commands to the device firmware,
206 * and four transmit queues for data.
207 ***************************************************/
208
209static int iwl_queue_space(const struct iwl_queue *q)
210{
211 int s = q->last_used - q->first_empty;
212
213 if (q->last_used > q->first_empty)
214 s -= q->n_bd;
215
216 if (s <= 0)
217 s += q->n_window;
218 /* keep some reserve to not confuse empty and full situations */
219 s -= 2;
220 if (s < 0)
221 s = 0;
222 return s;
223}
224
225/* XXX: n_bd must be power-of-two size */
226static inline int iwl_queue_inc_wrap(int index, int n_bd)
227{
228 return ++index & (n_bd - 1);
229}
230
231/* XXX: n_bd must be power-of-two size */
232static inline int iwl_queue_dec_wrap(int index, int n_bd)
233{
234 return --index & (n_bd - 1);
235}
236
237static inline int x2_queue_used(const struct iwl_queue *q, int i)
238{
239 return q->first_empty > q->last_used ?
240 (i >= q->last_used && i < q->first_empty) :
241 !(i < q->last_used && i >= q->first_empty);
242}
243
244static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
245{
246 if (is_huge)
247 return q->n_window;
248
249 return index & (q->n_window - 1);
250}
251
252static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
253 int count, int slots_num, u32 id)
254{
255 q->n_bd = count;
256 q->n_window = slots_num;
257 q->id = id;
258
259 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
260 * and iwl_queue_dec_wrap are broken. */
261 BUG_ON(!is_power_of_2(count));
262
263 /* slots_num must be power-of-two size, otherwise
264 * get_cmd_index is broken. */
265 BUG_ON(!is_power_of_2(slots_num));
266
267 q->low_mark = q->n_window / 4;
268 if (q->low_mark < 4)
269 q->low_mark = 4;
270
271 q->high_mark = q->n_window / 8;
272 if (q->high_mark < 2)
273 q->high_mark = 2;
274
275 q->first_empty = q->last_used = 0;
276
277 return 0;
278}
279
280static int iwl_tx_queue_alloc(struct iwl_priv *priv,
281 struct iwl_tx_queue *txq, u32 id)
282{
283 struct pci_dev *dev = priv->pci_dev;
284
285 if (id != IWL_CMD_QUEUE_NUM) {
286 txq->txb = kmalloc(sizeof(txq->txb[0]) *
287 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
288 if (!txq->txb) {
289 IWL_ERROR("kmalloc for auxilary BD "
290 "structures failed\n");
291 goto error;
292 }
293 } else
294 txq->txb = NULL;
295
296 txq->bd = pci_alloc_consistent(dev,
297 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
298 &txq->q.dma_addr);
299
300 if (!txq->bd) {
301 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
302 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
303 goto error;
304 }
305 txq->q.id = id;
306
307 return 0;
308
309 error:
310 if (txq->txb) {
311 kfree(txq->txb);
312 txq->txb = NULL;
313 }
314
315 return -ENOMEM;
316}
317
318int iwl_tx_queue_init(struct iwl_priv *priv,
319 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
320{
321 struct pci_dev *dev = priv->pci_dev;
322 int len;
323 int rc = 0;
324
325 /* alocate command space + one big command for scan since scan
326 * command is very huge the system will not have two scan at the
327 * same time */
328 len = sizeof(struct iwl_cmd) * slots_num;
329 if (txq_id == IWL_CMD_QUEUE_NUM)
330 len += IWL_MAX_SCAN_SIZE;
331 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
332 if (!txq->cmd)
333 return -ENOMEM;
334
335 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
336 if (rc) {
337 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
338
339 return -ENOMEM;
340 }
341 txq->need_update = 0;
342
343 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
344 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
345 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
346 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
347
348 iwl_hw_tx_queue_init(priv, txq);
349
350 return 0;
351}
352
353/**
354 * iwl_tx_queue_free - Deallocate DMA queue.
355 * @txq: Transmit queue to deallocate.
356 *
357 * Empty queue by removing and destroying all BD's.
358 * Free all buffers. txq itself is not freed.
359 *
360 */
361void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
362{
363 struct iwl_queue *q = &txq->q;
364 struct pci_dev *dev = priv->pci_dev;
365 int len;
366
367 if (q->n_bd == 0)
368 return;
369
370 /* first, empty all BD's */
371 for (; q->first_empty != q->last_used;
372 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
373 iwl_hw_txq_free_tfd(priv, txq);
374
375 len = sizeof(struct iwl_cmd) * q->n_window;
376 if (q->id == IWL_CMD_QUEUE_NUM)
377 len += IWL_MAX_SCAN_SIZE;
378
379 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
380
381 /* free buffers belonging to queue itself */
382 if (txq->q.n_bd)
383 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
384 txq->q.n_bd, txq->bd, txq->q.dma_addr);
385
386 if (txq->txb) {
387 kfree(txq->txb);
388 txq->txb = NULL;
389 }
390
391 /* 0 fill whole structure */
392 memset(txq, 0, sizeof(*txq));
393}
394
395const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
396
397/*************** STATION TABLE MANAGEMENT ****
398 *
399 * NOTE: This needs to be overhauled to better synchronize between
400 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
401 *
402 * mac80211 should also be examined to determine if sta_info is duplicating
403 * the functionality provided here
404 */
405
406/**************************************************************/
407
408static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
409{
410 int index = IWL_INVALID_STATION;
411 int i;
412 unsigned long flags;
413
414 spin_lock_irqsave(&priv->sta_lock, flags);
415
416 if (is_ap)
417 index = IWL_AP_ID;
418 else if (is_broadcast_ether_addr(addr))
419 index = priv->hw_setting.bcast_sta_id;
420 else
421 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
422 if (priv->stations[i].used &&
423 !compare_ether_addr(priv->stations[i].sta.sta.addr,
424 addr)) {
425 index = i;
426 break;
427 }
428
429 if (unlikely(index == IWL_INVALID_STATION))
430 goto out;
431
432 if (priv->stations[index].used) {
433 priv->stations[index].used = 0;
434 priv->num_stations--;
435 }
436
437 BUG_ON(priv->num_stations < 0);
438
439out:
440 spin_unlock_irqrestore(&priv->sta_lock, flags);
441 return 0;
442}
443
444static void iwl_clear_stations_table(struct iwl_priv *priv)
445{
446 unsigned long flags;
447
448 spin_lock_irqsave(&priv->sta_lock, flags);
449
450 priv->num_stations = 0;
451 memset(priv->stations, 0, sizeof(priv->stations));
452
453 spin_unlock_irqrestore(&priv->sta_lock, flags);
454}
455
456u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
457{
458 int i;
459 int index = IWL_INVALID_STATION;
460 struct iwl_station_entry *station;
461 unsigned long flags_spin;
462
463 spin_lock_irqsave(&priv->sta_lock, flags_spin);
464 if (is_ap)
465 index = IWL_AP_ID;
466 else if (is_broadcast_ether_addr(addr))
467 index = priv->hw_setting.bcast_sta_id;
468 else
469 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
470 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
471 addr)) {
472 index = i;
473 break;
474 }
475
476 if (!priv->stations[i].used &&
477 index == IWL_INVALID_STATION)
478 index = i;
479 }
480
481
482 /* These twh conditions has the same outcome but keep them separate
483 since they have different meaning */
484 if (unlikely(index == IWL_INVALID_STATION)) {
485 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
486 return index;
487 }
488
489 if (priv->stations[index].used &&
490 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
491 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
492 return index;
493 }
494
495
496 IWL_DEBUG_ASSOC("Add STA ID %d: " MAC_FMT "\n", index, MAC_ARG(addr));
497 station = &priv->stations[index];
498 station->used = 1;
499 priv->num_stations++;
500
501 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
502 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
503 station->sta.mode = 0;
504 station->sta.sta.sta_id = index;
505 station->sta.station_flags = 0;
506
507#ifdef CONFIG_IWLWIFI_HT
508 /* BCAST station and IBSS stations do not work in HT mode */
509 if (index != priv->hw_setting.bcast_sta_id &&
510 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
511 iwl4965_set_ht_add_station(priv, index);
512#endif /*CONFIG_IWLWIFI_HT*/
513
514 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
515 iwl_send_add_station(priv, &station->sta, flags);
516 return index;
517
518}
519
520/*************** DRIVER STATUS FUNCTIONS *****/
521
522static inline int iwl_is_ready(struct iwl_priv *priv)
523{
524 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
525 * set but EXIT_PENDING is not */
526 return test_bit(STATUS_READY, &priv->status) &&
527 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
528 !test_bit(STATUS_EXIT_PENDING, &priv->status);
529}
530
531static inline int iwl_is_alive(struct iwl_priv *priv)
532{
533 return test_bit(STATUS_ALIVE, &priv->status);
534}
535
536static inline int iwl_is_init(struct iwl_priv *priv)
537{
538 return test_bit(STATUS_INIT, &priv->status);
539}
540
541static inline int iwl_is_rfkill(struct iwl_priv *priv)
542{
543 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
544 test_bit(STATUS_RF_KILL_SW, &priv->status);
545}
546
547static inline int iwl_is_ready_rf(struct iwl_priv *priv)
548{
549
550 if (iwl_is_rfkill(priv))
551 return 0;
552
553 return iwl_is_ready(priv);
554}
555
556/*************** HOST COMMAND QUEUE FUNCTIONS *****/
557
558#define IWL_CMD(x) case x : return #x
559
560static const char *get_cmd_string(u8 cmd)
561{
562 switch (cmd) {
563 IWL_CMD(REPLY_ALIVE);
564 IWL_CMD(REPLY_ERROR);
565 IWL_CMD(REPLY_RXON);
566 IWL_CMD(REPLY_RXON_ASSOC);
567 IWL_CMD(REPLY_QOS_PARAM);
568 IWL_CMD(REPLY_RXON_TIMING);
569 IWL_CMD(REPLY_ADD_STA);
570 IWL_CMD(REPLY_REMOVE_STA);
571 IWL_CMD(REPLY_REMOVE_ALL_STA);
572 IWL_CMD(REPLY_TX);
573 IWL_CMD(REPLY_RATE_SCALE);
574 IWL_CMD(REPLY_LEDS_CMD);
575 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
576 IWL_CMD(RADAR_NOTIFICATION);
577 IWL_CMD(REPLY_QUIET_CMD);
578 IWL_CMD(REPLY_CHANNEL_SWITCH);
579 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
580 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
581 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
582 IWL_CMD(POWER_TABLE_CMD);
583 IWL_CMD(PM_SLEEP_NOTIFICATION);
584 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
585 IWL_CMD(REPLY_SCAN_CMD);
586 IWL_CMD(REPLY_SCAN_ABORT_CMD);
587 IWL_CMD(SCAN_START_NOTIFICATION);
588 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
589 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
590 IWL_CMD(BEACON_NOTIFICATION);
591 IWL_CMD(REPLY_TX_BEACON);
592 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
593 IWL_CMD(QUIET_NOTIFICATION);
594 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
595 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
596 IWL_CMD(REPLY_BT_CONFIG);
597 IWL_CMD(REPLY_STATISTICS_CMD);
598 IWL_CMD(STATISTICS_NOTIFICATION);
599 IWL_CMD(REPLY_CARD_STATE_CMD);
600 IWL_CMD(CARD_STATE_NOTIFICATION);
601 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
602 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
603 IWL_CMD(SENSITIVITY_CMD);
604 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
605 IWL_CMD(REPLY_RX_PHY_CMD);
606 IWL_CMD(REPLY_RX_MPDU_CMD);
607 IWL_CMD(REPLY_4965_RX);
608 IWL_CMD(REPLY_COMPRESSED_BA);
609 default:
610 return "UNKNOWN";
611
612 }
613}
614
615#define HOST_COMPLETE_TIMEOUT (HZ / 2)
616
617/**
618 * iwl_enqueue_hcmd - enqueue a uCode command
619 * @priv: device private data point
620 * @cmd: a point to the ucode command structure
621 *
622 * The function returns < 0 values to indicate the operation is
623 * failed. On success, it turns the index (> 0) of command in the
624 * command queue.
625 */
626static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
627{
628 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
629 struct iwl_queue *q = &txq->q;
630 struct iwl_tfd_frame *tfd;
631 u32 *control_flags;
632 struct iwl_cmd *out_cmd;
633 u32 idx;
634 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
635 dma_addr_t phys_addr;
636 int ret;
637 unsigned long flags;
638
639 /* If any of the command structures end up being larger than
640 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
641 * we will need to increase the size of the TFD entries */
642 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
643 !(cmd->meta.flags & CMD_SIZE_HUGE));
644
645 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
646 IWL_ERROR("No space for Tx\n");
647 return -ENOSPC;
648 }
649
650 spin_lock_irqsave(&priv->hcmd_lock, flags);
651
652 tfd = &txq->bd[q->first_empty];
653 memset(tfd, 0, sizeof(*tfd));
654
655 control_flags = (u32 *) tfd;
656
657 idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
658 out_cmd = &txq->cmd[idx];
659
660 out_cmd->hdr.cmd = cmd->id;
661 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
662 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
663
664 /* At this point, the out_cmd now has all of the incoming cmd
665 * information */
666
667 out_cmd->hdr.flags = 0;
668 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
669 INDEX_TO_SEQ(q->first_empty));
670 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
671 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
672
673 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
674 offsetof(struct iwl_cmd, hdr);
675 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
676
677 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
678 "%d bytes at %d[%d]:%d\n",
679 get_cmd_string(out_cmd->hdr.cmd),
680 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
681 fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
682
683 txq->need_update = 1;
684 ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
685 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
686 iwl_tx_queue_update_write_ptr(priv, txq);
687
688 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
689 return ret ? ret : idx;
690}
691
692int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
693{
694 int ret;
695
696 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
697
698 /* An asynchronous command can not expect an SKB to be set. */
699 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
700
701 /* An asynchronous command MUST have a callback. */
702 BUG_ON(!cmd->meta.u.callback);
703
704 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
705 return -EBUSY;
706
707 ret = iwl_enqueue_hcmd(priv, cmd);
708 if (ret < 0) {
709 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
710 get_cmd_string(cmd->id), ret);
711 return ret;
712 }
713 return 0;
714}
715
716int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
717{
718 int cmd_idx;
719 int ret;
720 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
721
722 BUG_ON(cmd->meta.flags & CMD_ASYNC);
723
724 /* A synchronous command can not have a callback set. */
725 BUG_ON(cmd->meta.u.callback != NULL);
726
727 if (atomic_xchg(&entry, 1)) {
728 IWL_ERROR("Error sending %s: Already sending a host command\n",
729 get_cmd_string(cmd->id));
730 return -EBUSY;
731 }
732
733 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
734
735 if (cmd->meta.flags & CMD_WANT_SKB)
736 cmd->meta.source = &cmd->meta;
737
738 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
739 if (cmd_idx < 0) {
740 ret = cmd_idx;
741 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
742 get_cmd_string(cmd->id), ret);
743 goto out;
744 }
745
746 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
747 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
748 HOST_COMPLETE_TIMEOUT);
749 if (!ret) {
750 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
751 IWL_ERROR("Error sending %s: time out after %dms.\n",
752 get_cmd_string(cmd->id),
753 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
754
755 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
756 ret = -ETIMEDOUT;
757 goto cancel;
758 }
759 }
760
761 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
762 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
763 get_cmd_string(cmd->id));
764 ret = -ECANCELED;
765 goto fail;
766 }
767 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
768 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
769 get_cmd_string(cmd->id));
770 ret = -EIO;
771 goto fail;
772 }
773 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
774 IWL_ERROR("Error: Response NULL in '%s'\n",
775 get_cmd_string(cmd->id));
776 ret = -EIO;
777 goto out;
778 }
779
780 ret = 0;
781 goto out;
782
783cancel:
784 if (cmd->meta.flags & CMD_WANT_SKB) {
785 struct iwl_cmd *qcmd;
786
787 /* Cancel the CMD_WANT_SKB flag for the cmd in the
788 * TX cmd queue. Otherwise in case the cmd comes
789 * in later, it will possibly set an invalid
790 * address (cmd->meta.source). */
791 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
792 qcmd->meta.flags &= ~CMD_WANT_SKB;
793 }
794fail:
795 if (cmd->meta.u.skb) {
796 dev_kfree_skb_any(cmd->meta.u.skb);
797 cmd->meta.u.skb = NULL;
798 }
799out:
800 atomic_set(&entry, 0);
801 return ret;
802}
803
804int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
805{
806 /* A command can not be asynchronous AND expect an SKB to be set. */
807 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
808 (cmd->meta.flags & CMD_WANT_SKB));
809
810 if (cmd->meta.flags & CMD_ASYNC)
811 return iwl_send_cmd_async(priv, cmd);
812
813 return iwl_send_cmd_sync(priv, cmd);
814}
815
816int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
817{
818 struct iwl_host_cmd cmd = {
819 .id = id,
820 .len = len,
821 .data = data,
822 };
823
824 return iwl_send_cmd_sync(priv, &cmd);
825}
826
827static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
828{
829 struct iwl_host_cmd cmd = {
830 .id = id,
831 .len = sizeof(val),
832 .data = &val,
833 };
834
835 return iwl_send_cmd_sync(priv, &cmd);
836}
837
838int iwl_send_statistics_request(struct iwl_priv *priv)
839{
840 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
841}
842
843/**
844 * iwl_rxon_add_station - add station into station table.
845 *
846 * there is only one AP station with id= IWL_AP_ID
847 * NOTE: mutex must be held before calling the this fnction
848*/
849static int iwl_rxon_add_station(struct iwl_priv *priv,
850 const u8 *addr, int is_ap)
851{
852 u8 rc;
853
854 /* Remove this station if it happens to already exist */
855 iwl_remove_station(priv, addr, is_ap);
856
857 rc = iwl_add_station(priv, addr, is_ap, 0);
858
859 iwl4965_add_station(priv, addr, is_ap);
860
861 return rc;
862}
863
864/**
865 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
866 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
867 * @channel: Any channel valid for the requested phymode
868
869 * In addition to setting the staging RXON, priv->phymode is also set.
870 *
871 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
872 * in the staging RXON flag structure based on the phymode
873 */
874static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
875{
876 if (!iwl_get_channel_info(priv, phymode, channel)) {
877 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
878 channel, phymode);
879 return -EINVAL;
880 }
881
882 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
883 (priv->phymode == phymode))
884 return 0;
885
886 priv->staging_rxon.channel = cpu_to_le16(channel);
887 if (phymode == MODE_IEEE80211A)
888 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
889 else
890 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
891
892 priv->phymode = phymode;
893
894 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
895
896 return 0;
897}
898
899/**
900 * iwl_check_rxon_cmd - validate RXON structure is valid
901 *
902 * NOTE: This is really only useful during development and can eventually
903 * be #ifdef'd out once the driver is stable and folks aren't actively
904 * making changes
905 */
906static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
907{
908 int error = 0;
909 int counter = 1;
910
911 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
912 error |= le32_to_cpu(rxon->flags &
913 (RXON_FLG_TGJ_NARROW_BAND_MSK |
914 RXON_FLG_RADAR_DETECT_MSK));
915 if (error)
916 IWL_WARNING("check 24G fields %d | %d\n",
917 counter++, error);
918 } else {
919 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
920 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
921 if (error)
922 IWL_WARNING("check 52 fields %d | %d\n",
923 counter++, error);
924 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
925 if (error)
926 IWL_WARNING("check 52 CCK %d | %d\n",
927 counter++, error);
928 }
929 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
930 if (error)
931 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
932
933 /* make sure basic rates 6Mbps and 1Mbps are supported */
934 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
935 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
936 if (error)
937 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
938
939 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
940 if (error)
941 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
942
943 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
944 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
945 if (error)
946 IWL_WARNING("check CCK and short slot %d | %d\n",
947 counter++, error);
948
949 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
950 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
951 if (error)
952 IWL_WARNING("check CCK & auto detect %d | %d\n",
953 counter++, error);
954
955 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
956 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
957 if (error)
958 IWL_WARNING("check TGG and auto detect %d | %d\n",
959 counter++, error);
960
961 if (error)
962 IWL_WARNING("Tuning to channel %d\n",
963 le16_to_cpu(rxon->channel));
964
965 if (error) {
966 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
967 return -1;
968 }
969 return 0;
970}
971
972/**
973 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
974 * @priv: staging_rxon is comapred to active_rxon
975 *
976 * If the RXON structure is changing sufficient to require a new
977 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
978 * to indicate a new tune is required.
979 */
980static int iwl_full_rxon_required(struct iwl_priv *priv)
981{
982
983 /* These items are only settable from the full RXON command */
984 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
985 compare_ether_addr(priv->staging_rxon.bssid_addr,
986 priv->active_rxon.bssid_addr) ||
987 compare_ether_addr(priv->staging_rxon.node_addr,
988 priv->active_rxon.node_addr) ||
989 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
990 priv->active_rxon.wlap_bssid_addr) ||
991 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
992 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
993 (priv->staging_rxon.air_propagation !=
994 priv->active_rxon.air_propagation) ||
995 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
996 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
997 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
998 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
999 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1000 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1001 return 1;
1002
1003 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1004 * be updated with the RXON_ASSOC command -- however only some
1005 * flag transitions are allowed using RXON_ASSOC */
1006
1007 /* Check if we are not switching bands */
1008 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1009 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1010 return 1;
1011
1012 /* Check if we are switching association toggle */
1013 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1014 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1015 return 1;
1016
1017 return 0;
1018}
1019
1020static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1021{
1022 int rc = 0;
1023 struct iwl_rx_packet *res = NULL;
1024 struct iwl_rxon_assoc_cmd rxon_assoc;
1025 struct iwl_host_cmd cmd = {
1026 .id = REPLY_RXON_ASSOC,
1027 .len = sizeof(rxon_assoc),
1028 .meta.flags = CMD_WANT_SKB,
1029 .data = &rxon_assoc,
1030 };
1031 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1032 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1033
1034 if ((rxon1->flags == rxon2->flags) &&
1035 (rxon1->filter_flags == rxon2->filter_flags) &&
1036 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1037 (rxon1->ofdm_ht_single_stream_basic_rates ==
1038 rxon2->ofdm_ht_single_stream_basic_rates) &&
1039 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1040 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1041 (rxon1->rx_chain == rxon2->rx_chain) &&
1042 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1043 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1044 return 0;
1045 }
1046
1047 rxon_assoc.flags = priv->staging_rxon.flags;
1048 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1049 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1050 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1051 rxon_assoc.reserved = 0;
1052 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1053 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1054 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1055 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1056 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1057
1058 rc = iwl_send_cmd_sync(priv, &cmd);
1059 if (rc)
1060 return rc;
1061
1062 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1063 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1064 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1065 rc = -EIO;
1066 }
1067
1068 priv->alloc_rxb_skb--;
1069 dev_kfree_skb_any(cmd.meta.u.skb);
1070
1071 return rc;
1072}
1073
1074/**
1075 * iwl_commit_rxon - commit staging_rxon to hardware
1076 *
1077 * The RXON command in staging_rxon is commited to the hardware and
1078 * the active_rxon structure is updated with the new data. This
1079 * function correctly transitions out of the RXON_ASSOC_MSK state if
1080 * a HW tune is required based on the RXON structure changes.
1081 */
1082static int iwl_commit_rxon(struct iwl_priv *priv)
1083{
1084 /* cast away the const for active_rxon in this function */
1085 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1086 int rc = 0;
1087
1088 if (!iwl_is_alive(priv))
1089 return -1;
1090
1091 /* always get timestamp with Rx frame */
1092 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1093
1094 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1095 if (rc) {
1096 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1097 return -EINVAL;
1098 }
1099
1100 /* If we don't need to send a full RXON, we can use
1101 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1102 * and other flags for the current radio configuration. */
1103 if (!iwl_full_rxon_required(priv)) {
1104 rc = iwl_send_rxon_assoc(priv);
1105 if (rc) {
1106 IWL_ERROR("Error setting RXON_ASSOC "
1107 "configuration (%d).\n", rc);
1108 return rc;
1109 }
1110
1111 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1112
1113 return 0;
1114 }
1115
1116 /* station table will be cleared */
1117 priv->assoc_station_added = 0;
1118
1119#ifdef CONFIG_IWLWIFI_SENSITIVITY
1120 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1121 if (!priv->error_recovering)
1122 priv->start_calib = 0;
1123
1124 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1125#endif /* CONFIG_IWLWIFI_SENSITIVITY */
1126
1127 /* If we are currently associated and the new config requires
1128 * an RXON_ASSOC and the new config wants the associated mask enabled,
1129 * we must clear the associated from the active configuration
1130 * before we apply the new config */
1131 if (iwl_is_associated(priv) &&
1132 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1133 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1134 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1135
1136 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1137 sizeof(struct iwl_rxon_cmd),
1138 &priv->active_rxon);
1139
1140 /* If the mask clearing failed then we set
1141 * active_rxon back to what it was previously */
1142 if (rc) {
1143 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1144 IWL_ERROR("Error clearing ASSOC_MSK on current "
1145 "configuration (%d).\n", rc);
1146 return rc;
1147 }
1148
1149 /* The RXON bit toggling will have cleared out the
1150 * station table in the uCode, so blank it in the driver
1151 * as well */
1152 iwl_clear_stations_table(priv);
1153 } else if (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) {
1154 /* When switching from non-associated to associated, the
1155 * uCode clears out the station table; so clear it in the
1156 * driver as well */
1157 iwl_clear_stations_table(priv);
1158 }
1159
1160 IWL_DEBUG_INFO("Sending RXON\n"
1161 "* with%s RXON_FILTER_ASSOC_MSK\n"
1162 "* channel = %d\n"
1163 "* bssid = " MAC_FMT "\n",
1164 ((priv->staging_rxon.filter_flags &
1165 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1166 le16_to_cpu(priv->staging_rxon.channel),
1167 MAC_ARG(priv->staging_rxon.bssid_addr));
1168
1169 /* Apply the new configuration */
1170 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1171 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1172 if (rc) {
1173 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1174 return rc;
1175 }
1176
1177#ifdef CONFIG_IWLWIFI_SENSITIVITY
1178 if (!priv->error_recovering)
1179 priv->start_calib = 0;
1180
1181 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1182 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1183#endif /* CONFIG_IWLWIFI_SENSITIVITY */
1184
1185 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1186
1187 /* If we issue a new RXON command which required a tune then we must
1188 * send a new TXPOWER command or we won't be able to Tx any frames */
1189 rc = iwl_hw_reg_send_txpower(priv);
1190 if (rc) {
1191 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1192 return rc;
1193 }
1194
1195 /* Add the broadcast address so we can send broadcast frames */
1196 if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1197 IWL_INVALID_STATION) {
1198 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1199 return -EIO;
1200 }
1201
1202 /* If we have set the ASSOC_MSK and we are in BSS mode then
1203 * add the IWL_AP_ID to the station rate table */
1204 if (iwl_is_associated(priv) &&
1205 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1206 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1207 == IWL_INVALID_STATION) {
1208 IWL_ERROR("Error adding AP address for transmit.\n");
1209 return -EIO;
1210 }
1211 priv->assoc_station_added = 1;
1212 }
1213
1214 return 0;
1215}
1216
1217static int iwl_send_bt_config(struct iwl_priv *priv)
1218{
1219 struct iwl_bt_cmd bt_cmd = {
1220 .flags = 3,
1221 .lead_time = 0xAA,
1222 .max_kill = 1,
1223 .kill_ack_mask = 0,
1224 .kill_cts_mask = 0,
1225 };
1226
1227 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1228 sizeof(struct iwl_bt_cmd), &bt_cmd);
1229}
1230
1231static int iwl_send_scan_abort(struct iwl_priv *priv)
1232{
1233 int rc = 0;
1234 struct iwl_rx_packet *res;
1235 struct iwl_host_cmd cmd = {
1236 .id = REPLY_SCAN_ABORT_CMD,
1237 .meta.flags = CMD_WANT_SKB,
1238 };
1239
1240 /* If there isn't a scan actively going on in the hardware
1241 * then we are in between scan bands and not actually
1242 * actively scanning, so don't send the abort command */
1243 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1244 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1245 return 0;
1246 }
1247
1248 rc = iwl_send_cmd_sync(priv, &cmd);
1249 if (rc) {
1250 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1251 return rc;
1252 }
1253
1254 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1255 if (res->u.status != CAN_ABORT_STATUS) {
1256 /* The scan abort will return 1 for success or
1257 * 2 for "failure". A failure condition can be
1258 * due to simply not being in an active scan which
1259 * can occur if we send the scan abort before we
1260 * the microcode has notified us that a scan is
1261 * completed. */
1262 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1263 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1264 clear_bit(STATUS_SCAN_HW, &priv->status);
1265 }
1266
1267 dev_kfree_skb_any(cmd.meta.u.skb);
1268
1269 return rc;
1270}
1271
1272static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1273 struct iwl_cmd *cmd,
1274 struct sk_buff *skb)
1275{
1276 return 1;
1277}
1278
1279/*
1280 * CARD_STATE_CMD
1281 *
1282 * Use: Sets the internal card state to enable, disable, or halt
1283 *
1284 * When in the 'enable' state the card operates as normal.
1285 * When in the 'disable' state, the card enters into a low power mode.
1286 * When in the 'halt' state, the card is shut down and must be fully
1287 * restarted to come back on.
1288 */
1289static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1290{
1291 struct iwl_host_cmd cmd = {
1292 .id = REPLY_CARD_STATE_CMD,
1293 .len = sizeof(u32),
1294 .data = &flags,
1295 .meta.flags = meta_flag,
1296 };
1297
1298 if (meta_flag & CMD_ASYNC)
1299 cmd.meta.u.callback = iwl_card_state_sync_callback;
1300
1301 return iwl_send_cmd(priv, &cmd);
1302}
1303
1304static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1305 struct iwl_cmd *cmd, struct sk_buff *skb)
1306{
1307 struct iwl_rx_packet *res = NULL;
1308
1309 if (!skb) {
1310 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1311 return 1;
1312 }
1313
1314 res = (struct iwl_rx_packet *)skb->data;
1315 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1316 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1317 res->hdr.flags);
1318 return 1;
1319 }
1320
1321 switch (res->u.add_sta.status) {
1322 case ADD_STA_SUCCESS_MSK:
1323 break;
1324 default:
1325 break;
1326 }
1327
1328 /* We didn't cache the SKB; let the caller free it */
1329 return 1;
1330}
1331
1332int iwl_send_add_station(struct iwl_priv *priv,
1333 struct iwl_addsta_cmd *sta, u8 flags)
1334{
1335 struct iwl_rx_packet *res = NULL;
1336 int rc = 0;
1337 struct iwl_host_cmd cmd = {
1338 .id = REPLY_ADD_STA,
1339 .len = sizeof(struct iwl_addsta_cmd),
1340 .meta.flags = flags,
1341 .data = sta,
1342 };
1343
1344 if (flags & CMD_ASYNC)
1345 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1346 else
1347 cmd.meta.flags |= CMD_WANT_SKB;
1348
1349 rc = iwl_send_cmd(priv, &cmd);
1350
1351 if (rc || (flags & CMD_ASYNC))
1352 return rc;
1353
1354 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1355 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1356 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1357 res->hdr.flags);
1358 rc = -EIO;
1359 }
1360
1361 if (rc == 0) {
1362 switch (res->u.add_sta.status) {
1363 case ADD_STA_SUCCESS_MSK:
1364 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1365 break;
1366 default:
1367 rc = -EIO;
1368 IWL_WARNING("REPLY_ADD_STA failed\n");
1369 break;
1370 }
1371 }
1372
1373 priv->alloc_rxb_skb--;
1374 dev_kfree_skb_any(cmd.meta.u.skb);
1375
1376 return rc;
1377}
1378
1379static int iwl_update_sta_key_info(struct iwl_priv *priv,
1380 struct ieee80211_key_conf *keyconf,
1381 u8 sta_id)
1382{
1383 unsigned long flags;
1384 __le16 key_flags = 0;
1385
1386 switch (keyconf->alg) {
1387 case ALG_CCMP:
1388 key_flags |= STA_KEY_FLG_CCMP;
1389 key_flags |= cpu_to_le16(
1390 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1391 key_flags &= ~STA_KEY_FLG_INVALID;
1392 break;
1393 case ALG_TKIP:
1394 case ALG_WEP:
1395 return -EINVAL;
1396 default:
1397 return -EINVAL;
1398 }
1399 spin_lock_irqsave(&priv->sta_lock, flags);
1400 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1401 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1402 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1403 keyconf->keylen);
1404
1405 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1406 keyconf->keylen);
1407 priv->stations[sta_id].sta.key.key_flags = key_flags;
1408 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1409 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410
1411 spin_unlock_irqrestore(&priv->sta_lock, flags);
1412
1413 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1414 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1415 return 0;
1416}
1417
1418static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1419{
1420 unsigned long flags;
1421
1422 spin_lock_irqsave(&priv->sta_lock, flags);
1423 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1424 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1425 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1426 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1427 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1428 spin_unlock_irqrestore(&priv->sta_lock, flags);
1429
1430 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1431 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1432 return 0;
1433}
1434
1435static void iwl_clear_free_frames(struct iwl_priv *priv)
1436{
1437 struct list_head *element;
1438
1439 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1440 priv->frames_count);
1441
1442 while (!list_empty(&priv->free_frames)) {
1443 element = priv->free_frames.next;
1444 list_del(element);
1445 kfree(list_entry(element, struct iwl_frame, list));
1446 priv->frames_count--;
1447 }
1448
1449 if (priv->frames_count) {
1450 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1451 priv->frames_count);
1452 priv->frames_count = 0;
1453 }
1454}
1455
1456static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1457{
1458 struct iwl_frame *frame;
1459 struct list_head *element;
1460 if (list_empty(&priv->free_frames)) {
1461 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1462 if (!frame) {
1463 IWL_ERROR("Could not allocate frame!\n");
1464 return NULL;
1465 }
1466
1467 priv->frames_count++;
1468 return frame;
1469 }
1470
1471 element = priv->free_frames.next;
1472 list_del(element);
1473 return list_entry(element, struct iwl_frame, list);
1474}
1475
1476static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1477{
1478 memset(frame, 0, sizeof(*frame));
1479 list_add(&frame->list, &priv->free_frames);
1480}
1481
1482unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1483 struct ieee80211_hdr *hdr,
1484 const u8 *dest, int left)
1485{
1486
1487 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1488 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1489 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1490 return 0;
1491
1492 if (priv->ibss_beacon->len > left)
1493 return 0;
1494
1495 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1496
1497 return priv->ibss_beacon->len;
1498}
1499
1500int iwl_rate_index_from_plcp(int plcp)
1501{
1502 int i = 0;
1503
1504 if (plcp & RATE_MCS_HT_MSK) {
1505 i = (plcp & 0xff);
1506
1507 if (i >= IWL_RATE_MIMO_6M_PLCP)
1508 i = i - IWL_RATE_MIMO_6M_PLCP;
1509
1510 i += IWL_FIRST_OFDM_RATE;
1511 /* skip 9M not supported in ht*/
1512 if (i >= IWL_RATE_9M_INDEX)
1513 i += 1;
1514 if ((i >= IWL_FIRST_OFDM_RATE) &&
1515 (i <= IWL_LAST_OFDM_RATE))
1516 return i;
1517 } else {
1518 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1519 if (iwl_rates[i].plcp == (plcp &0xFF))
1520 return i;
1521 }
1522 return -1;
1523}
1524
1525static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1526{
1527 u8 i;
1528
1529 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1530 i = iwl_rates[i].next_ieee) {
1531 if (rate_mask & (1 << i))
1532 return iwl_rates[i].plcp;
1533 }
1534
1535 return IWL_RATE_INVALID;
1536}
1537
1538static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1539{
1540 struct iwl_frame *frame;
1541 unsigned int frame_size;
1542 int rc;
1543 u8 rate;
1544
1545 frame = iwl_get_free_frame(priv);
1546
1547 if (!frame) {
1548 IWL_ERROR("Could not obtain free frame buffer for beacon "
1549 "command.\n");
1550 return -ENOMEM;
1551 }
1552
1553 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1554 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1555 0xFF0);
1556 if (rate == IWL_INVALID_RATE)
1557 rate = IWL_RATE_6M_PLCP;
1558 } else {
1559 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1560 if (rate == IWL_INVALID_RATE)
1561 rate = IWL_RATE_1M_PLCP;
1562 }
1563
1564 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1565
1566 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1567 &frame->u.cmd[0]);
1568
1569 iwl_free_frame(priv, frame);
1570
1571 return rc;
1572}
1573
1574/******************************************************************************
1575 *
1576 * EEPROM related functions
1577 *
1578 ******************************************************************************/
1579
1580static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1581{
1582 memcpy(mac, priv->eeprom.mac_address, 6);
1583}
1584
1585/**
1586 * iwl_eeprom_init - read EEPROM contents
1587 *
1588 * Load the EEPROM from adapter into priv->eeprom
1589 *
1590 * NOTE: This routine uses the non-debug IO access functions.
1591 */
1592int iwl_eeprom_init(struct iwl_priv *priv)
1593{
1594 u16 *e = (u16 *)&priv->eeprom;
1595 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1596 u32 r;
1597 int sz = sizeof(priv->eeprom);
1598 int rc;
1599 int i;
1600 u16 addr;
1601
1602 /* The EEPROM structure has several padding buffers within it
1603 * and when adding new EEPROM maps is subject to programmer errors
1604 * which may be very difficult to identify without explicitly
1605 * checking the resulting size of the eeprom map. */
1606 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1607
1608 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1609 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1610 return -ENOENT;
1611 }
1612
1613 rc = iwl_eeprom_aqcuire_semaphore(priv);
1614 if (rc < 0) {
1615 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1616 return -ENOENT;
1617 }
1618
1619 /* eeprom is an array of 16bit values */
1620 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1621 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1622 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1623
1624 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1625 i += IWL_EEPROM_ACCESS_DELAY) {
1626 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1627 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1628 break;
1629 udelay(IWL_EEPROM_ACCESS_DELAY);
1630 }
1631
1632 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1633 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1634 rc = -ETIMEDOUT;
1635 goto done;
1636 }
1637 e[addr / 2] = le16_to_cpu(r >> 16);
1638 }
1639 rc = 0;
1640
1641done:
1642 iwl_eeprom_release_semaphore(priv);
1643 return rc;
1644}
1645
1646/******************************************************************************
1647 *
1648 * Misc. internal state and helper functions
1649 *
1650 ******************************************************************************/
1651#ifdef CONFIG_IWLWIFI_DEBUG
1652
1653/**
1654 * iwl_report_frame - dump frame to syslog during debug sessions
1655 *
1656 * hack this function to show different aspects of received frames,
1657 * including selective frame dumps.
1658 * group100 parameter selects whether to show 1 out of 100 good frames.
1659 *
1660 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1661 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1662 * is 3945-specific and gives bad output for 4965. Need to split the
1663 * functionality, keep common stuff here.
1664 */
1665void iwl_report_frame(struct iwl_priv *priv,
1666 struct iwl_rx_packet *pkt,
1667 struct ieee80211_hdr *header, int group100)
1668{
1669 u32 to_us;
1670 u32 print_summary = 0;
1671 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1672 u32 hundred = 0;
1673 u32 dataframe = 0;
1674 u16 fc;
1675 u16 seq_ctl;
1676 u16 channel;
1677 u16 phy_flags;
1678 int rate_sym;
1679 u16 length;
1680 u16 status;
1681 u16 bcn_tmr;
1682 u32 tsf_low;
1683 u64 tsf;
1684 u8 rssi;
1685 u8 agc;
1686 u16 sig_avg;
1687 u16 noise_diff;
1688 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1689 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1690 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1691 u8 *data = IWL_RX_DATA(pkt);
1692
1693 /* MAC header */
1694 fc = le16_to_cpu(header->frame_control);
1695 seq_ctl = le16_to_cpu(header->seq_ctrl);
1696
1697 /* metadata */
1698 channel = le16_to_cpu(rx_hdr->channel);
1699 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1700 rate_sym = rx_hdr->rate;
1701 length = le16_to_cpu(rx_hdr->len);
1702
1703 /* end-of-frame status and timestamp */
1704 status = le32_to_cpu(rx_end->status);
1705 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1706 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1707 tsf = le64_to_cpu(rx_end->timestamp);
1708
1709 /* signal statistics */
1710 rssi = rx_stats->rssi;
1711 agc = rx_stats->agc;
1712 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1713 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1714
1715 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1716
1717 /* if data frame is to us and all is good,
1718 * (optionally) print summary for only 1 out of every 100 */
1719 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1720 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1721 dataframe = 1;
1722 if (!group100)
1723 print_summary = 1; /* print each frame */
1724 else if (priv->framecnt_to_us < 100) {
1725 priv->framecnt_to_us++;
1726 print_summary = 0;
1727 } else {
1728 priv->framecnt_to_us = 0;
1729 print_summary = 1;
1730 hundred = 1;
1731 }
1732 } else {
1733 /* print summary for all other frames */
1734 print_summary = 1;
1735 }
1736
1737 if (print_summary) {
1738 char *title;
1739 u32 rate;
1740
1741 if (hundred)
1742 title = "100Frames";
1743 else if (fc & IEEE80211_FCTL_RETRY)
1744 title = "Retry";
1745 else if (ieee80211_is_assoc_response(fc))
1746 title = "AscRsp";
1747 else if (ieee80211_is_reassoc_response(fc))
1748 title = "RasRsp";
1749 else if (ieee80211_is_probe_response(fc)) {
1750 title = "PrbRsp";
1751 print_dump = 1; /* dump frame contents */
1752 } else if (ieee80211_is_beacon(fc)) {
1753 title = "Beacon";
1754 print_dump = 1; /* dump frame contents */
1755 } else if (ieee80211_is_atim(fc))
1756 title = "ATIM";
1757 else if (ieee80211_is_auth(fc))
1758 title = "Auth";
1759 else if (ieee80211_is_deauth(fc))
1760 title = "DeAuth";
1761 else if (ieee80211_is_disassoc(fc))
1762 title = "DisAssoc";
1763 else
1764 title = "Frame";
1765
1766 rate = iwl_rate_index_from_plcp(rate_sym);
1767 if (rate == -1)
1768 rate = 0;
1769 else
1770 rate = iwl_rates[rate].ieee / 2;
1771
1772 /* print frame summary.
1773 * MAC addresses show just the last byte (for brevity),
1774 * but you can hack it to show more, if you'd like to. */
1775 if (dataframe)
1776 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1777 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1778 title, fc, header->addr1[5],
1779 length, rssi, channel, rate);
1780 else {
1781 /* src/dst addresses assume managed mode */
1782 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1783 "src=0x%02x, rssi=%u, tim=%lu usec, "
1784 "phy=0x%02x, chnl=%d\n",
1785 title, fc, header->addr1[5],
1786 header->addr3[5], rssi,
1787 tsf_low - priv->scan_start_tsf,
1788 phy_flags, channel);
1789 }
1790 }
1791 if (print_dump)
1792 iwl_print_hex_dump(IWL_DL_RX, data, length);
1793}
1794#endif
1795
1796static void iwl_unset_hw_setting(struct iwl_priv *priv)
1797{
1798 if (priv->hw_setting.shared_virt)
1799 pci_free_consistent(priv->pci_dev,
1800 sizeof(struct iwl_shared),
1801 priv->hw_setting.shared_virt,
1802 priv->hw_setting.shared_phys);
1803}
1804
1805/**
1806 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1807 *
1808 * return : set the bit for each supported rate insert in ie
1809 */
1810static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1811 u16 basic_rate, int max_count)
1812{
1813 u16 ret_rates = 0, bit;
1814 int i;
1815 u8 *rates;
1816
1817 rates = &(ie[1]);
1818
1819 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1820 if (bit & supported_rate) {
1821 ret_rates |= bit;
1822 rates[*ie] = iwl_rates[i].ieee |
1823 ((bit & basic_rate) ? 0x80 : 0x00);
1824 *ie = *ie + 1;
1825 if (*ie >= max_count)
1826 break;
1827 }
1828 }
1829
1830 return ret_rates;
1831}
1832
1833#ifdef CONFIG_IWLWIFI_HT
1834void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1835 struct ieee80211_ht_capability *ht_cap,
1836 u8 use_wide_chan);
1837#endif
1838
1839/**
1840 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1841 */
1842static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1843 struct ieee80211_mgmt *frame,
1844 int left, int is_direct)
1845{
1846 int len = 0;
1847 u8 *pos = NULL;
1848 u16 ret_rates;
1849
1850 /* Make sure there is enough space for the probe request,
1851 * two mandatory IEs and the data */
1852 left -= 24;
1853 if (left < 0)
1854 return 0;
1855 len += 24;
1856
1857 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1858 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1859 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1860 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1861 frame->seq_ctrl = 0;
1862
1863 /* fill in our indirect SSID IE */
1864 /* ...next IE... */
1865
1866 left -= 2;
1867 if (left < 0)
1868 return 0;
1869 len += 2;
1870 pos = &(frame->u.probe_req.variable[0]);
1871 *pos++ = WLAN_EID_SSID;
1872 *pos++ = 0;
1873
1874 /* fill in our direct SSID IE... */
1875 if (is_direct) {
1876 /* ...next IE... */
1877 left -= 2 + priv->essid_len;
1878 if (left < 0)
1879 return 0;
1880 /* ... fill it in... */
1881 *pos++ = WLAN_EID_SSID;
1882 *pos++ = priv->essid_len;
1883 memcpy(pos, priv->essid, priv->essid_len);
1884 pos += priv->essid_len;
1885 len += 2 + priv->essid_len;
1886 }
1887
1888 /* fill in supported rate */
1889 /* ...next IE... */
1890 left -= 2;
1891 if (left < 0)
1892 return 0;
1893 /* ... fill it in... */
1894 *pos++ = WLAN_EID_SUPP_RATES;
1895 *pos = 0;
1896 ret_rates = priv->active_rate = priv->rates_mask;
1897 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1898
1899 iwl_supported_rate_to_ie(pos, priv->active_rate,
1900 priv->active_rate_basic, left);
1901 len += 2 + *pos;
1902 pos += (*pos) + 1;
1903 ret_rates = ~ret_rates & priv->active_rate;
1904
1905 if (ret_rates == 0)
1906 goto fill_end;
1907
1908 /* fill in supported extended rate */
1909 /* ...next IE... */
1910 left -= 2;
1911 if (left < 0)
1912 return 0;
1913 /* ... fill it in... */
1914 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1915 *pos = 0;
1916 iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1917 if (*pos > 0)
1918 len += 2 + *pos;
1919
1920#ifdef CONFIG_IWLWIFI_HT
1921 if (is_direct && priv->is_ht_enabled) {
1922 u8 use_wide_chan = 1;
1923
1924 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1925 use_wide_chan = 0;
1926 pos += (*pos) + 1;
1927 *pos++ = WLAN_EID_HT_CAPABILITY;
1928 *pos++ = sizeof(struct ieee80211_ht_capability);
1929 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1930 use_wide_chan);
1931 len += 2 + sizeof(struct ieee80211_ht_capability);
1932 }
1933#endif /*CONFIG_IWLWIFI_HT */
1934
1935 fill_end:
1936 return (u16)len;
1937}
1938
1939/*
1940 * QoS support
1941*/
1942#ifdef CONFIG_IWLWIFI_QOS
1943static int iwl_send_qos_params_command(struct iwl_priv *priv,
1944 struct iwl_qosparam_cmd *qos)
1945{
1946
1947 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1948 sizeof(struct iwl_qosparam_cmd), qos);
1949}
1950
1951static void iwl_reset_qos(struct iwl_priv *priv)
1952{
1953 u16 cw_min = 15;
1954 u16 cw_max = 1023;
1955 u8 aifs = 2;
1956 u8 is_legacy = 0;
1957 unsigned long flags;
1958 int i;
1959
1960 spin_lock_irqsave(&priv->lock, flags);
1961 priv->qos_data.qos_active = 0;
1962
1963 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1964 if (priv->qos_data.qos_enable)
1965 priv->qos_data.qos_active = 1;
1966 if (!(priv->active_rate & 0xfff0)) {
1967 cw_min = 31;
1968 is_legacy = 1;
1969 }
1970 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1971 if (priv->qos_data.qos_enable)
1972 priv->qos_data.qos_active = 1;
1973 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1974 cw_min = 31;
1975 is_legacy = 1;
1976 }
1977
1978 if (priv->qos_data.qos_active)
1979 aifs = 3;
1980
1981 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1982 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1983 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1984 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1985 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1986
1987 if (priv->qos_data.qos_active) {
1988 i = 1;
1989 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1990 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1991 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1992 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1993 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1994
1995 i = 2;
1996 priv->qos_data.def_qos_parm.ac[i].cw_min =
1997 cpu_to_le16((cw_min + 1) / 2 - 1);
1998 priv->qos_data.def_qos_parm.ac[i].cw_max =
1999 cpu_to_le16(cw_max);
2000 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2001 if (is_legacy)
2002 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2003 cpu_to_le16(6016);
2004 else
2005 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2006 cpu_to_le16(3008);
2007 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2008
2009 i = 3;
2010 priv->qos_data.def_qos_parm.ac[i].cw_min =
2011 cpu_to_le16((cw_min + 1) / 4 - 1);
2012 priv->qos_data.def_qos_parm.ac[i].cw_max =
2013 cpu_to_le16((cw_max + 1) / 2 - 1);
2014 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2015 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2016 if (is_legacy)
2017 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2018 cpu_to_le16(3264);
2019 else
2020 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2021 cpu_to_le16(1504);
2022 } else {
2023 for (i = 1; i < 4; i++) {
2024 priv->qos_data.def_qos_parm.ac[i].cw_min =
2025 cpu_to_le16(cw_min);
2026 priv->qos_data.def_qos_parm.ac[i].cw_max =
2027 cpu_to_le16(cw_max);
2028 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2029 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2030 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2031 }
2032 }
2033 IWL_DEBUG_QOS("set QoS to default \n");
2034
2035 spin_unlock_irqrestore(&priv->lock, flags);
2036}
2037
2038static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2039{
2040 unsigned long flags;
2041
2042 if (priv == NULL)
2043 return;
2044
2045 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2046 return;
2047
2048 if (!priv->qos_data.qos_enable)
2049 return;
2050
2051 spin_lock_irqsave(&priv->lock, flags);
2052 priv->qos_data.def_qos_parm.qos_flags = 0;
2053
2054 if (priv->qos_data.qos_cap.q_AP.queue_request &&
2055 !priv->qos_data.qos_cap.q_AP.txop_request)
2056 priv->qos_data.def_qos_parm.qos_flags |=
2057 QOS_PARAM_FLG_TXOP_TYPE_MSK;
2058
2059 if (priv->qos_data.qos_active)
2060 priv->qos_data.def_qos_parm.qos_flags |=
2061 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2062
2063 spin_unlock_irqrestore(&priv->lock, flags);
2064
2065 if (force || iwl_is_associated(priv)) {
2066 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2067 priv->qos_data.qos_active);
2068
2069 iwl_send_qos_params_command(priv,
2070 &(priv->qos_data.def_qos_parm));
2071 }
2072}
2073
2074#endif /* CONFIG_IWLWIFI_QOS */
2075/*
2076 * Power management (not Tx power!) functions
2077 */
2078#define MSEC_TO_USEC 1024
2079
2080#define NOSLP __constant_cpu_to_le16(0), 0, 0
2081#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2082#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2083#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2084 __constant_cpu_to_le32(X1), \
2085 __constant_cpu_to_le32(X2), \
2086 __constant_cpu_to_le32(X3), \
2087 __constant_cpu_to_le32(X4)}
2088
2089
2090/* default power management (not Tx power) table values */
2091/* for tim 0-10 */
2092static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2093 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2094 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2095 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2096 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2097 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2098 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2099};
2100
2101/* for tim > 10 */
2102static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2103 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2104 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2105 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2106 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2107 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2108 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2109 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2110 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2111 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2112 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2113};
2114
2115int iwl_power_init_handle(struct iwl_priv *priv)
2116{
2117 int rc = 0, i;
2118 struct iwl_power_mgr *pow_data;
2119 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2120 u16 pci_pm;
2121
2122 IWL_DEBUG_POWER("Initialize power \n");
2123
2124 pow_data = &(priv->power_data);
2125
2126 memset(pow_data, 0, sizeof(*pow_data));
2127
2128 pow_data->active_index = IWL_POWER_RANGE_0;
2129 pow_data->dtim_val = 0xffff;
2130
2131 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2132 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2133
2134 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2135 if (rc != 0)
2136 return 0;
2137 else {
2138 struct iwl_powertable_cmd *cmd;
2139
2140 IWL_DEBUG_POWER("adjust power command flags\n");
2141
2142 for (i = 0; i < IWL_POWER_AC; i++) {
2143 cmd = &pow_data->pwr_range_0[i].cmd;
2144
2145 if (pci_pm & 0x1)
2146 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2147 else
2148 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2149 }
2150 }
2151 return rc;
2152}
2153
2154static int iwl_update_power_cmd(struct iwl_priv *priv,
2155 struct iwl_powertable_cmd *cmd, u32 mode)
2156{
2157 int rc = 0, i;
2158 u8 skip;
2159 u32 max_sleep = 0;
2160 struct iwl_power_vec_entry *range;
2161 u8 period = 0;
2162 struct iwl_power_mgr *pow_data;
2163
2164 if (mode > IWL_POWER_INDEX_5) {
2165 IWL_DEBUG_POWER("Error invalid power mode \n");
2166 return -1;
2167 }
2168 pow_data = &(priv->power_data);
2169
2170 if (pow_data->active_index == IWL_POWER_RANGE_0)
2171 range = &pow_data->pwr_range_0[0];
2172 else
2173 range = &pow_data->pwr_range_1[1];
2174
2175 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2176
2177#ifdef IWL_MAC80211_DISABLE
2178 if (priv->assoc_network != NULL) {
2179 unsigned long flags;
2180
2181 period = priv->assoc_network->tim.tim_period;
2182 }
2183#endif /*IWL_MAC80211_DISABLE */
2184 skip = range[mode].no_dtim;
2185
2186 if (period == 0) {
2187 period = 1;
2188 skip = 0;
2189 }
2190
2191 if (skip == 0) {
2192 max_sleep = period;
2193 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2194 } else {
2195 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2196 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2197 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2198 }
2199
2200 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2201 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2202 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2203 }
2204
2205 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2206 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2207 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2208 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2209 le32_to_cpu(cmd->sleep_interval[0]),
2210 le32_to_cpu(cmd->sleep_interval[1]),
2211 le32_to_cpu(cmd->sleep_interval[2]),
2212 le32_to_cpu(cmd->sleep_interval[3]),
2213 le32_to_cpu(cmd->sleep_interval[4]));
2214
2215 return rc;
2216}
2217
2218static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2219{
2220 u32 final_mode = mode;
2221 int rc;
2222 struct iwl_powertable_cmd cmd;
2223
2224 /* If on battery, set to 3,
2225 * if plugged into AC power, set to CAM ("continuosly aware mode"),
2226 * else user level */
2227 switch (mode) {
2228 case IWL_POWER_BATTERY:
2229 final_mode = IWL_POWER_INDEX_3;
2230 break;
2231 case IWL_POWER_AC:
2232 final_mode = IWL_POWER_MODE_CAM;
2233 break;
2234 default:
2235 final_mode = mode;
2236 break;
2237 }
2238
2239 cmd.keep_alive_beacons = 0;
2240
2241 iwl_update_power_cmd(priv, &cmd, final_mode);
2242
2243 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2244
2245 if (final_mode == IWL_POWER_MODE_CAM)
2246 clear_bit(STATUS_POWER_PMI, &priv->status);
2247 else
2248 set_bit(STATUS_POWER_PMI, &priv->status);
2249
2250 return rc;
2251}
2252
2253int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2254{
2255 /* Filter incoming packets to determine if they are targeted toward
2256 * this network, discarding packets coming from ourselves */
2257 switch (priv->iw_mode) {
2258 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2259 /* packets from our adapter are dropped (echo) */
2260 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2261 return 0;
2262 /* {broad,multi}cast packets to our IBSS go through */
2263 if (is_multicast_ether_addr(header->addr1))
2264 return !compare_ether_addr(header->addr3, priv->bssid);
2265 /* packets to our adapter go through */
2266 return !compare_ether_addr(header->addr1, priv->mac_addr);
2267 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2268 /* packets from our adapter are dropped (echo) */
2269 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2270 return 0;
2271 /* {broad,multi}cast packets to our BSS go through */
2272 if (is_multicast_ether_addr(header->addr1))
2273 return !compare_ether_addr(header->addr2, priv->bssid);
2274 /* packets to our adapter go through */
2275 return !compare_ether_addr(header->addr1, priv->mac_addr);
2276 }
2277
2278 return 1;
2279}
2280
2281#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2282
2283const char *iwl_get_tx_fail_reason(u32 status)
2284{
2285 switch (status & TX_STATUS_MSK) {
2286 case TX_STATUS_SUCCESS:
2287 return "SUCCESS";
2288 TX_STATUS_ENTRY(SHORT_LIMIT);
2289 TX_STATUS_ENTRY(LONG_LIMIT);
2290 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2291 TX_STATUS_ENTRY(MGMNT_ABORT);
2292 TX_STATUS_ENTRY(NEXT_FRAG);
2293 TX_STATUS_ENTRY(LIFE_EXPIRE);
2294 TX_STATUS_ENTRY(DEST_PS);
2295 TX_STATUS_ENTRY(ABORTED);
2296 TX_STATUS_ENTRY(BT_RETRY);
2297 TX_STATUS_ENTRY(STA_INVALID);
2298 TX_STATUS_ENTRY(FRAG_DROPPED);
2299 TX_STATUS_ENTRY(TID_DISABLE);
2300 TX_STATUS_ENTRY(FRAME_FLUSHED);
2301 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2302 TX_STATUS_ENTRY(TX_LOCKED);
2303 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2304 }
2305
2306 return "UNKNOWN";
2307}
2308
2309/**
2310 * iwl_scan_cancel - Cancel any currently executing HW scan
2311 *
2312 * NOTE: priv->mutex is not required before calling this function
2313 */
2314static int iwl_scan_cancel(struct iwl_priv *priv)
2315{
2316 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2317 clear_bit(STATUS_SCANNING, &priv->status);
2318 return 0;
2319 }
2320
2321 if (test_bit(STATUS_SCANNING, &priv->status)) {
2322 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2323 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2324 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2325 queue_work(priv->workqueue, &priv->abort_scan);
2326
2327 } else
2328 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2329
2330 return test_bit(STATUS_SCANNING, &priv->status);
2331 }
2332
2333 return 0;
2334}
2335
2336/**
2337 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2338 * @ms: amount of time to wait (in milliseconds) for scan to abort
2339 *
2340 * NOTE: priv->mutex must be held before calling this function
2341 */
2342static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2343{
2344 unsigned long now = jiffies;
2345 int ret;
2346
2347 ret = iwl_scan_cancel(priv);
2348 if (ret && ms) {
2349 mutex_unlock(&priv->mutex);
2350 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2351 test_bit(STATUS_SCANNING, &priv->status))
2352 msleep(1);
2353 mutex_lock(&priv->mutex);
2354
2355 return test_bit(STATUS_SCANNING, &priv->status);
2356 }
2357
2358 return ret;
2359}
2360
2361static void iwl_sequence_reset(struct iwl_priv *priv)
2362{
2363 /* Reset ieee stats */
2364
2365 /* We don't reset the net_device_stats (ieee->stats) on
2366 * re-association */
2367
2368 priv->last_seq_num = -1;
2369 priv->last_frag_num = -1;
2370 priv->last_packet_time = 0;
2371
2372 iwl_scan_cancel(priv);
2373}
2374
2375#define MAX_UCODE_BEACON_INTERVAL 4096
2376#define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2377
2378static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2379{
2380 u16 new_val = 0;
2381 u16 beacon_factor = 0;
2382
2383 beacon_factor =
2384 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2385 / MAX_UCODE_BEACON_INTERVAL;
2386 new_val = beacon_val / beacon_factor;
2387
2388 return cpu_to_le16(new_val);
2389}
2390
2391static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2392{
2393 u64 interval_tm_unit;
2394 u64 tsf, result;
2395 unsigned long flags;
2396 struct ieee80211_conf *conf = NULL;
2397 u16 beacon_int = 0;
2398
2399 conf = ieee80211_get_hw_conf(priv->hw);
2400
2401 spin_lock_irqsave(&priv->lock, flags);
2402 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2403 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2404
2405 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2406
2407 tsf = priv->timestamp1;
2408 tsf = ((tsf << 32) | priv->timestamp0);
2409
2410 beacon_int = priv->beacon_int;
2411 spin_unlock_irqrestore(&priv->lock, flags);
2412
2413 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2414 if (beacon_int == 0) {
2415 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2416 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2417 } else {
2418 priv->rxon_timing.beacon_interval =
2419 cpu_to_le16(beacon_int);
2420 priv->rxon_timing.beacon_interval =
2421 iwl_adjust_beacon_interval(
2422 le16_to_cpu(priv->rxon_timing.beacon_interval));
2423 }
2424
2425 priv->rxon_timing.atim_window = 0;
2426 } else {
2427 priv->rxon_timing.beacon_interval =
2428 iwl_adjust_beacon_interval(conf->beacon_int);
2429 /* TODO: we need to get atim_window from upper stack
2430 * for now we set to 0 */
2431 priv->rxon_timing.atim_window = 0;
2432 }
2433
2434 interval_tm_unit =
2435 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2436 result = do_div(tsf, interval_tm_unit);
2437 priv->rxon_timing.beacon_init_val =
2438 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2439
2440 IWL_DEBUG_ASSOC
2441 ("beacon interval %d beacon timer %d beacon tim %d\n",
2442 le16_to_cpu(priv->rxon_timing.beacon_interval),
2443 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2444 le16_to_cpu(priv->rxon_timing.atim_window));
2445}
2446
2447static int iwl_scan_initiate(struct iwl_priv *priv)
2448{
2449 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2450 IWL_ERROR("APs don't scan.\n");
2451 return 0;
2452 }
2453
2454 if (!iwl_is_ready_rf(priv)) {
2455 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2456 return -EIO;
2457 }
2458
2459 if (test_bit(STATUS_SCANNING, &priv->status)) {
2460 IWL_DEBUG_SCAN("Scan already in progress.\n");
2461 return -EAGAIN;
2462 }
2463
2464 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2465 IWL_DEBUG_SCAN("Scan request while abort pending. "
2466 "Queuing.\n");
2467 return -EAGAIN;
2468 }
2469
2470 IWL_DEBUG_INFO("Starting scan...\n");
2471 priv->scan_bands = 2;
2472 set_bit(STATUS_SCANNING, &priv->status);
2473 priv->scan_start = jiffies;
2474 priv->scan_pass_start = priv->scan_start;
2475
2476 queue_work(priv->workqueue, &priv->request_scan);
2477
2478 return 0;
2479}
2480
2481static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2482{
2483 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2484
2485 if (hw_decrypt)
2486 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2487 else
2488 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2489
2490 return 0;
2491}
2492
2493static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2494{
2495 if (phymode == MODE_IEEE80211A) {
2496 priv->staging_rxon.flags &=
2497 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2498 | RXON_FLG_CCK_MSK);
2499 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2500 } else {
2501 /* Copied from iwl_bg_post_associate() */
2502 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2503 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2504 else
2505 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2506
2507 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2508 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2509
2510 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2511 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2512 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2513 }
2514}
2515
2516/*
2517 * initilize rxon structure with default values fromm eeprom
2518 */
2519static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2520{
2521 const struct iwl_channel_info *ch_info;
2522
2523 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2524
2525 switch (priv->iw_mode) {
2526 case IEEE80211_IF_TYPE_AP:
2527 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2528 break;
2529
2530 case IEEE80211_IF_TYPE_STA:
2531 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2532 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2533 break;
2534
2535 case IEEE80211_IF_TYPE_IBSS:
2536 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2537 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2538 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2539 RXON_FILTER_ACCEPT_GRP_MSK;
2540 break;
2541
2542 case IEEE80211_IF_TYPE_MNTR:
2543 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2544 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2545 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2546 break;
2547 }
2548
2549#if 0
2550 /* TODO: Figure out when short_preamble would be set and cache from
2551 * that */
2552 if (!hw_to_local(priv->hw)->short_preamble)
2553 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2554 else
2555 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2556#endif
2557
2558 ch_info = iwl_get_channel_info(priv, priv->phymode,
2559 le16_to_cpu(priv->staging_rxon.channel));
2560
2561 if (!ch_info)
2562 ch_info = &priv->channel_info[0];
2563
2564 /*
2565 * in some case A channels are all non IBSS
2566 * in this case force B/G channel
2567 */
2568 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2569 !(is_channel_ibss(ch_info)))
2570 ch_info = &priv->channel_info[0];
2571
2572 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2573 if (is_channel_a_band(ch_info))
2574 priv->phymode = MODE_IEEE80211A;
2575 else
2576 priv->phymode = MODE_IEEE80211G;
2577
2578 iwl_set_flags_for_phymode(priv, priv->phymode);
2579
2580 priv->staging_rxon.ofdm_basic_rates =
2581 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2582 priv->staging_rxon.cck_basic_rates =
2583 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2584
2585 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2586 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2587 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2588 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2589 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2590 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2591 iwl4965_set_rxon_chain(priv);
2592}
2593
2594static int iwl_set_mode(struct iwl_priv *priv, int mode)
2595{
2596 if (!iwl_is_ready_rf(priv))
2597 return -EAGAIN;
2598
2599 if (mode == IEEE80211_IF_TYPE_IBSS) {
2600 const struct iwl_channel_info *ch_info;
2601
2602 ch_info = iwl_get_channel_info(priv,
2603 priv->phymode,
2604 le16_to_cpu(priv->staging_rxon.channel));
2605
2606 if (!ch_info || !is_channel_ibss(ch_info)) {
2607 IWL_ERROR("channel %d not IBSS channel\n",
2608 le16_to_cpu(priv->staging_rxon.channel));
2609 return -EINVAL;
2610 }
2611 }
2612
2613 cancel_delayed_work(&priv->scan_check);
2614 if (iwl_scan_cancel_timeout(priv, 100)) {
2615 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2616 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2617 return -EAGAIN;
2618 }
2619
2620 priv->iw_mode = mode;
2621
2622 iwl_connection_init_rx_config(priv);
2623 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2624
2625 iwl_clear_stations_table(priv);
2626
2627 iwl_commit_rxon(priv);
2628
2629 return 0;
2630}
2631
2632static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2633 struct ieee80211_tx_control *ctl,
2634 struct iwl_cmd *cmd,
2635 struct sk_buff *skb_frag,
2636 int last_frag)
2637{
2638 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2639
2640 switch (keyinfo->alg) {
2641 case ALG_CCMP:
2642 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2643 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2644 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2645 break;
2646
2647 case ALG_TKIP:
2648#if 0
2649 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2650
2651 if (last_frag)
2652 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2653 8);
2654 else
2655 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2656#endif
2657 break;
2658
2659 case ALG_WEP:
2660 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2661 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2662
2663 if (keyinfo->keylen == 13)
2664 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2665
2666 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2667
2668 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2669 "with key %d\n", ctl->key_idx);
2670 break;
2671
2672 case ALG_NONE:
2673 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2674 break;
2675
2676 default:
2677 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2678 break;
2679 }
2680}
2681
2682/*
2683 * handle build REPLY_TX command notification.
2684 */
2685static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2686 struct iwl_cmd *cmd,
2687 struct ieee80211_tx_control *ctrl,
2688 struct ieee80211_hdr *hdr,
2689 int is_unicast, u8 std_id)
2690{
2691 __le16 *qc;
2692 u16 fc = le16_to_cpu(hdr->frame_control);
2693 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2694
2695 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2696 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2697 tx_flags |= TX_CMD_FLG_ACK_MSK;
2698 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2699 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2700 if (ieee80211_is_probe_response(fc) &&
2701 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2702 tx_flags |= TX_CMD_FLG_TSF_MSK;
2703 } else {
2704 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2705 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2706 }
2707
2708 cmd->cmd.tx.sta_id = std_id;
2709 if (ieee80211_get_morefrag(hdr))
2710 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2711
2712 qc = ieee80211_get_qos_ctrl(hdr);
2713 if (qc) {
2714 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2715 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2716 } else
2717 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2718
2719 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2720 tx_flags |= TX_CMD_FLG_RTS_MSK;
2721 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2722 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2723 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2724 tx_flags |= TX_CMD_FLG_CTS_MSK;
2725 }
2726
2727 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2728 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2729
2730 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2731 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2732 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2733 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2734 cmd->cmd.tx.timeout.pm_frame_timeout =
2735 cpu_to_le16(3);
2736 else
2737 cmd->cmd.tx.timeout.pm_frame_timeout =
2738 cpu_to_le16(2);
2739 } else
2740 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2741
2742 cmd->cmd.tx.driver_txop = 0;
2743 cmd->cmd.tx.tx_flags = tx_flags;
2744 cmd->cmd.tx.next_frame_len = 0;
2745}
2746
2747static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2748{
2749 int sta_id;
2750 u16 fc = le16_to_cpu(hdr->frame_control);
2751
2752 /* If this frame is broadcast or not data then use the broadcast
2753 * station id */
2754 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2755 is_multicast_ether_addr(hdr->addr1))
2756 return priv->hw_setting.bcast_sta_id;
2757
2758 switch (priv->iw_mode) {
2759
2760 /* If this frame is part of a BSS network (we're a station), then
2761 * we use the AP's station id */
2762 case IEEE80211_IF_TYPE_STA:
2763 return IWL_AP_ID;
2764
2765 /* If we are an AP, then find the station, or use BCAST */
2766 case IEEE80211_IF_TYPE_AP:
2767 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2768 if (sta_id != IWL_INVALID_STATION)
2769 return sta_id;
2770 return priv->hw_setting.bcast_sta_id;
2771
2772 /* If this frame is part of a IBSS network, then we use the
2773 * target specific station id */
2774 case IEEE80211_IF_TYPE_IBSS:
2775 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2776 if (sta_id != IWL_INVALID_STATION)
2777 return sta_id;
2778
2779 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2780
2781 if (sta_id != IWL_INVALID_STATION)
2782 return sta_id;
2783
2784 IWL_DEBUG_DROP("Station " MAC_FMT " not in station map. "
2785 "Defaulting to broadcast...\n",
2786 MAC_ARG(hdr->addr1));
2787 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2788 return priv->hw_setting.bcast_sta_id;
2789
2790 default:
2791 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2792 return priv->hw_setting.bcast_sta_id;
2793 }
2794}
2795
2796/*
2797 * start REPLY_TX command process
2798 */
2799static int iwl_tx_skb(struct iwl_priv *priv,
2800 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2801{
2802 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2803 struct iwl_tfd_frame *tfd;
2804 u32 *control_flags;
2805 int txq_id = ctl->queue;
2806 struct iwl_tx_queue *txq = NULL;
2807 struct iwl_queue *q = NULL;
2808 dma_addr_t phys_addr;
2809 dma_addr_t txcmd_phys;
2810 struct iwl_cmd *out_cmd = NULL;
2811 u16 len, idx, len_org;
2812 u8 id, hdr_len, unicast;
2813 u8 sta_id;
2814 u16 seq_number = 0;
2815 u16 fc;
2816 __le16 *qc;
2817 u8 wait_write_ptr = 0;
2818 unsigned long flags;
2819 int rc;
2820
2821 spin_lock_irqsave(&priv->lock, flags);
2822 if (iwl_is_rfkill(priv)) {
2823 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2824 goto drop_unlock;
2825 }
2826
2827 if (!priv->interface_id) {
2828 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2829 goto drop_unlock;
2830 }
2831
2832 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2833 IWL_ERROR("ERROR: No TX rate available.\n");
2834 goto drop_unlock;
2835 }
2836
2837 unicast = !is_multicast_ether_addr(hdr->addr1);
2838 id = 0;
2839
2840 fc = le16_to_cpu(hdr->frame_control);
2841
2842#ifdef CONFIG_IWLWIFI_DEBUG
2843 if (ieee80211_is_auth(fc))
2844 IWL_DEBUG_TX("Sending AUTH frame\n");
2845 else if (ieee80211_is_assoc_request(fc))
2846 IWL_DEBUG_TX("Sending ASSOC frame\n");
2847 else if (ieee80211_is_reassoc_request(fc))
2848 IWL_DEBUG_TX("Sending REASSOC frame\n");
2849#endif
2850
2851 if (!iwl_is_associated(priv) &&
2852 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2853 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2854 goto drop_unlock;
2855 }
2856
2857 spin_unlock_irqrestore(&priv->lock, flags);
2858
2859 hdr_len = ieee80211_get_hdrlen(fc);
2860 sta_id = iwl_get_sta_id(priv, hdr);
2861 if (sta_id == IWL_INVALID_STATION) {
2862 IWL_DEBUG_DROP("Dropping - INVALID STATION: " MAC_FMT "\n",
2863 MAC_ARG(hdr->addr1));
2864 goto drop;
2865 }
2866
2867 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2868
2869 qc = ieee80211_get_qos_ctrl(hdr);
2870 if (qc) {
2871 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2872 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2873 IEEE80211_SCTL_SEQ;
2874 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2875 (hdr->seq_ctrl &
2876 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2877 seq_number += 0x10;
2878#ifdef CONFIG_IWLWIFI_HT
2879#ifdef CONFIG_IWLWIFI_HT_AGG
2880 /* aggregation is on for this <sta,tid> */
2881 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2882 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2883#endif /* CONFIG_IWLWIFI_HT_AGG */
2884#endif /* CONFIG_IWLWIFI_HT */
2885 }
2886 txq = &priv->txq[txq_id];
2887 q = &txq->q;
2888
2889 spin_lock_irqsave(&priv->lock, flags);
2890
2891 tfd = &txq->bd[q->first_empty];
2892 memset(tfd, 0, sizeof(*tfd));
2893 control_flags = (u32 *) tfd;
2894 idx = get_cmd_index(q, q->first_empty, 0);
2895
2896 memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2897 txq->txb[q->first_empty].skb[0] = skb;
2898 memcpy(&(txq->txb[q->first_empty].status.control),
2899 ctl, sizeof(struct ieee80211_tx_control));
2900 out_cmd = &txq->cmd[idx];
2901 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2902 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2903 out_cmd->hdr.cmd = REPLY_TX;
2904 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2905 INDEX_TO_SEQ(q->first_empty)));
2906 /* copy frags header */
2907 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2908
2909 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2910 len = priv->hw_setting.tx_cmd_len +
2911 sizeof(struct iwl_cmd_header) + hdr_len;
2912
2913 len_org = len;
2914 len = (len + 3) & ~3;
2915
2916 if (len_org != len)
2917 len_org = 1;
2918 else
2919 len_org = 0;
2920
2921 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2922 offsetof(struct iwl_cmd, hdr);
2923
2924 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2925
2926 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2927 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2928
2929 /* 802.11 null functions have no payload... */
2930 len = skb->len - hdr_len;
2931 if (len) {
2932 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2933 len, PCI_DMA_TODEVICE);
2934 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2935 }
2936
2937 if (len_org)
2938 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2939
2940 len = (u16)skb->len;
2941 out_cmd->cmd.tx.len = cpu_to_le16(len);
2942
2943 /* TODO need this for burst mode later on */
2944 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2945
2946 /* set is_hcca to 0; it probably will never be implemented */
2947 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2948
2949 iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2950 hdr, hdr_len, ctl, NULL);
2951
2952 if (!ieee80211_get_morefrag(hdr)) {
2953 txq->need_update = 1;
2954 if (qc) {
2955 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2956 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2957 }
2958 } else {
2959 wait_write_ptr = 1;
2960 txq->need_update = 0;
2961 }
2962
2963 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2964 sizeof(out_cmd->cmd.tx));
2965
2966 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2967 ieee80211_get_hdrlen(fc));
2968
2969 iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2970
2971 q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2972 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2973 spin_unlock_irqrestore(&priv->lock, flags);
2974
2975 if (rc)
2976 return rc;
2977
2978 if ((iwl_queue_space(q) < q->high_mark)
2979 && priv->mac80211_registered) {
2980 if (wait_write_ptr) {
2981 spin_lock_irqsave(&priv->lock, flags);
2982 txq->need_update = 1;
2983 iwl_tx_queue_update_write_ptr(priv, txq);
2984 spin_unlock_irqrestore(&priv->lock, flags);
2985 }
2986
2987 ieee80211_stop_queue(priv->hw, ctl->queue);
2988 }
2989
2990 return 0;
2991
2992drop_unlock:
2993 spin_unlock_irqrestore(&priv->lock, flags);
2994drop:
2995 return -1;
2996}
2997
2998static void iwl_set_rate(struct iwl_priv *priv)
2999{
3000 const struct ieee80211_hw_mode *hw = NULL;
3001 struct ieee80211_rate *rate;
3002 int i;
3003
3004 hw = iwl_get_hw_mode(priv, priv->phymode);
3005
3006 priv->active_rate = 0;
3007 priv->active_rate_basic = 0;
3008
3009 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3010 hw->mode == MODE_IEEE80211A ?
3011 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3012
3013 for (i = 0; i < hw->num_rates; i++) {
3014 rate = &(hw->rates[i]);
3015 if ((rate->val < IWL_RATE_COUNT) &&
3016 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3017 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3018 rate->val, iwl_rates[rate->val].plcp,
3019 (rate->flags & IEEE80211_RATE_BASIC) ?
3020 "*" : "");
3021 priv->active_rate |= (1 << rate->val);
3022 if (rate->flags & IEEE80211_RATE_BASIC)
3023 priv->active_rate_basic |= (1 << rate->val);
3024 } else
3025 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3026 rate->val, iwl_rates[rate->val].plcp);
3027 }
3028
3029 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3030 priv->active_rate, priv->active_rate_basic);
3031
3032 /*
3033 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3034 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3035 * OFDM
3036 */
3037 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3038 priv->staging_rxon.cck_basic_rates =
3039 ((priv->active_rate_basic &
3040 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3041 else
3042 priv->staging_rxon.cck_basic_rates =
3043 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3044
3045 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3046 priv->staging_rxon.ofdm_basic_rates =
3047 ((priv->active_rate_basic &
3048 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3049 IWL_FIRST_OFDM_RATE) & 0xFF;
3050 else
3051 priv->staging_rxon.ofdm_basic_rates =
3052 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3053}
3054
3055static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3056{
3057 unsigned long flags;
3058
3059 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3060 return;
3061
3062 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3063 disable_radio ? "OFF" : "ON");
3064
3065 if (disable_radio) {
3066 iwl_scan_cancel(priv);
3067 /* FIXME: This is a workaround for AP */
3068 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3069 spin_lock_irqsave(&priv->lock, flags);
3070 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3071 CSR_UCODE_SW_BIT_RFKILL);
3072 spin_unlock_irqrestore(&priv->lock, flags);
3073 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3074 set_bit(STATUS_RF_KILL_SW, &priv->status);
3075 }
3076 return;
3077 }
3078
3079 spin_lock_irqsave(&priv->lock, flags);
3080 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3081
3082 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3083 spin_unlock_irqrestore(&priv->lock, flags);
3084
3085 /* wake up ucode */
3086 msleep(10);
3087
3088 spin_lock_irqsave(&priv->lock, flags);
3089 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3090 if (!iwl_grab_restricted_access(priv))
3091 iwl_release_restricted_access(priv);
3092 spin_unlock_irqrestore(&priv->lock, flags);
3093
3094 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3095 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3096 "disabled by HW switch\n");
3097 return;
3098 }
3099
3100 queue_work(priv->workqueue, &priv->restart);
3101 return;
3102}
3103
3104void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3105 u32 decrypt_res, struct ieee80211_rx_status *stats)
3106{
3107 u16 fc =
3108 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3109
3110 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3111 return;
3112
3113 if (!(fc & IEEE80211_FCTL_PROTECTED))
3114 return;
3115
3116 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3117 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3118 case RX_RES_STATUS_SEC_TYPE_TKIP:
3119 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3120 RX_RES_STATUS_BAD_ICV_MIC)
3121 stats->flag |= RX_FLAG_MMIC_ERROR;
3122 case RX_RES_STATUS_SEC_TYPE_WEP:
3123 case RX_RES_STATUS_SEC_TYPE_CCMP:
3124 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3125 RX_RES_STATUS_DECRYPT_OK) {
3126 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3127 stats->flag |= RX_FLAG_DECRYPTED;
3128 }
3129 break;
3130
3131 default:
3132 break;
3133 }
3134}
3135
3136void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3137 struct iwl_rx_mem_buffer *rxb,
3138 void *data, short len,
3139 struct ieee80211_rx_status *stats,
3140 u16 phy_flags)
3141{
3142 struct iwl_rt_rx_hdr *iwl_rt;
3143
3144 /* First cache any information we need before we overwrite
3145 * the information provided in the skb from the hardware */
3146 s8 signal = stats->ssi;
3147 s8 noise = 0;
3148 int rate = stats->rate;
3149 u64 tsf = stats->mactime;
3150 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3151
3152 /* We received data from the HW, so stop the watchdog */
3153 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3154 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3155 return;
3156 }
3157
3158 /* copy the frame data to write after where the radiotap header goes */
3159 iwl_rt = (void *)rxb->skb->data;
3160 memmove(iwl_rt->payload, data, len);
3161
3162 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3163 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3164
3165 /* total header + data */
3166 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3167
3168 /* Set the size of the skb to the size of the frame */
3169 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3170
3171 /* Big bitfield of all the fields we provide in radiotap */
3172 iwl_rt->rt_hdr.it_present =
3173 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3174 (1 << IEEE80211_RADIOTAP_FLAGS) |
3175 (1 << IEEE80211_RADIOTAP_RATE) |
3176 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3177 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3178 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3179 (1 << IEEE80211_RADIOTAP_ANTENNA));
3180
3181 /* Zero the flags, we'll add to them as we go */
3182 iwl_rt->rt_flags = 0;
3183
3184 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3185
3186 /* Convert to dBm */
3187 iwl_rt->rt_dbmsignal = signal;
3188 iwl_rt->rt_dbmnoise = noise;
3189
3190 /* Convert the channel frequency and set the flags */
3191 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3192 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3193 iwl_rt->rt_chbitmask =
3194 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3195 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3196 iwl_rt->rt_chbitmask =
3197 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3198 else /* 802.11g */
3199 iwl_rt->rt_chbitmask =
3200 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3201
3202 rate = iwl_rate_index_from_plcp(rate);
3203 if (rate == -1)
3204 iwl_rt->rt_rate = 0;
3205 else
3206 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3207
3208 /* antenna number */
3209 iwl_rt->rt_antenna =
3210 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3211
3212 /* set the preamble flag if we have it */
3213 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3214 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3215
3216 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3217
3218 stats->flag |= RX_FLAG_RADIOTAP;
3219 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3220 rxb->skb = NULL;
3221}
3222
3223
3224#define IWL_PACKET_RETRY_TIME HZ
3225
3226int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3227{
3228 u16 sc = le16_to_cpu(header->seq_ctrl);
3229 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3230 u16 frag = sc & IEEE80211_SCTL_FRAG;
3231 u16 *last_seq, *last_frag;
3232 unsigned long *last_time;
3233
3234 switch (priv->iw_mode) {
3235 case IEEE80211_IF_TYPE_IBSS:{
3236 struct list_head *p;
3237 struct iwl_ibss_seq *entry = NULL;
3238 u8 *mac = header->addr2;
3239 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3240
3241 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3242 entry =
3243 list_entry(p, struct iwl_ibss_seq, list);
3244 if (!compare_ether_addr(entry->mac, mac))
3245 break;
3246 }
3247 if (p == &priv->ibss_mac_hash[index]) {
3248 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3249 if (!entry) {
3250 IWL_ERROR
3251 ("Cannot malloc new mac entry\n");
3252 return 0;
3253 }
3254 memcpy(entry->mac, mac, ETH_ALEN);
3255 entry->seq_num = seq;
3256 entry->frag_num = frag;
3257 entry->packet_time = jiffies;
3258 list_add(&entry->list,
3259 &priv->ibss_mac_hash[index]);
3260 return 0;
3261 }
3262 last_seq = &entry->seq_num;
3263 last_frag = &entry->frag_num;
3264 last_time = &entry->packet_time;
3265 break;
3266 }
3267 case IEEE80211_IF_TYPE_STA:
3268 last_seq = &priv->last_seq_num;
3269 last_frag = &priv->last_frag_num;
3270 last_time = &priv->last_packet_time;
3271 break;
3272 default:
3273 return 0;
3274 }
3275 if ((*last_seq == seq) &&
3276 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3277 if (*last_frag == frag)
3278 goto drop;
3279 if (*last_frag + 1 != frag)
3280 /* out-of-order fragment */
3281 goto drop;
3282 } else
3283 *last_seq = seq;
3284
3285 *last_frag = frag;
3286 *last_time = jiffies;
3287 return 0;
3288
3289 drop:
3290 return 1;
3291}
3292
3293#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3294
3295#include "iwl-spectrum.h"
3296
3297#define BEACON_TIME_MASK_LOW 0x00FFFFFF
3298#define BEACON_TIME_MASK_HIGH 0xFF000000
3299#define TIME_UNIT 1024
3300
3301/*
3302 * extended beacon time format
3303 * time in usec will be changed into a 32-bit value in 8:24 format
3304 * the high 1 byte is the beacon counts
3305 * the lower 3 bytes is the time in usec within one beacon interval
3306 */
3307
3308static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3309{
3310 u32 quot;
3311 u32 rem;
3312 u32 interval = beacon_interval * 1024;
3313
3314 if (!interval || !usec)
3315 return 0;
3316
3317 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3318 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3319
3320 return (quot << 24) + rem;
3321}
3322
3323/* base is usually what we get from ucode with each received frame,
3324 * the same as HW timer counter counting down
3325 */
3326
3327static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3328{
3329 u32 base_low = base & BEACON_TIME_MASK_LOW;
3330 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3331 u32 interval = beacon_interval * TIME_UNIT;
3332 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3333 (addon & BEACON_TIME_MASK_HIGH);
3334
3335 if (base_low > addon_low)
3336 res += base_low - addon_low;
3337 else if (base_low < addon_low) {
3338 res += interval + base_low - addon_low;
3339 res += (1 << 24);
3340 } else
3341 res += (1 << 24);
3342
3343 return cpu_to_le32(res);
3344}
3345
3346static int iwl_get_measurement(struct iwl_priv *priv,
3347 struct ieee80211_measurement_params *params,
3348 u8 type)
3349{
3350 struct iwl_spectrum_cmd spectrum;
3351 struct iwl_rx_packet *res;
3352 struct iwl_host_cmd cmd = {
3353 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3354 .data = (void *)&spectrum,
3355 .meta.flags = CMD_WANT_SKB,
3356 };
3357 u32 add_time = le64_to_cpu(params->start_time);
3358 int rc;
3359 int spectrum_resp_status;
3360 int duration = le16_to_cpu(params->duration);
3361
3362 if (iwl_is_associated(priv))
3363 add_time =
3364 iwl_usecs_to_beacons(
3365 le64_to_cpu(params->start_time) - priv->last_tsf,
3366 le16_to_cpu(priv->rxon_timing.beacon_interval));
3367
3368 memset(&spectrum, 0, sizeof(spectrum));
3369
3370 spectrum.channel_count = cpu_to_le16(1);
3371 spectrum.flags =
3372 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3373 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3374 cmd.len = sizeof(spectrum);
3375 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3376
3377 if (iwl_is_associated(priv))
3378 spectrum.start_time =
3379 iwl_add_beacon_time(priv->last_beacon_time,
3380 add_time,
3381 le16_to_cpu(priv->rxon_timing.beacon_interval));
3382 else
3383 spectrum.start_time = 0;
3384
3385 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3386 spectrum.channels[0].channel = params->channel;
3387 spectrum.channels[0].type = type;
3388 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3389 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3390 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3391
3392 rc = iwl_send_cmd_sync(priv, &cmd);
3393 if (rc)
3394 return rc;
3395
3396 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3397 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3398 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3399 rc = -EIO;
3400 }
3401
3402 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3403 switch (spectrum_resp_status) {
3404 case 0: /* Command will be handled */
3405 if (res->u.spectrum.id != 0xff) {
3406 IWL_DEBUG_INFO
3407 ("Replaced existing measurement: %d\n",
3408 res->u.spectrum.id);
3409 priv->measurement_status &= ~MEASUREMENT_READY;
3410 }
3411 priv->measurement_status |= MEASUREMENT_ACTIVE;
3412 rc = 0;
3413 break;
3414
3415 case 1: /* Command will not be handled */
3416 rc = -EAGAIN;
3417 break;
3418 }
3419
3420 dev_kfree_skb_any(cmd.meta.u.skb);
3421
3422 return rc;
3423}
3424#endif
3425
3426static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3427 struct iwl_tx_info *tx_sta)
3428{
3429
3430 tx_sta->status.ack_signal = 0;
3431 tx_sta->status.excessive_retries = 0;
3432 tx_sta->status.queue_length = 0;
3433 tx_sta->status.queue_number = 0;
3434
3435 if (in_interrupt())
3436 ieee80211_tx_status_irqsafe(priv->hw,
3437 tx_sta->skb[0], &(tx_sta->status));
3438 else
3439 ieee80211_tx_status(priv->hw,
3440 tx_sta->skb[0], &(tx_sta->status));
3441
3442 tx_sta->skb[0] = NULL;
3443}
3444
3445/**
3446 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3447 *
3448 * When FW advances 'R' index, all entries between old and
3449 * new 'R' index need to be reclaimed. As result, some free space
3450 * forms. If there is enough free space (> low mark), wake Tx queue.
3451 */
3452int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3453{
3454 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3455 struct iwl_queue *q = &txq->q;
3456 int nfreed = 0;
3457
3458 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3459 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3460 "is out of range [0-%d] %d %d.\n", txq_id,
3461 index, q->n_bd, q->first_empty, q->last_used);
3462 return 0;
3463 }
3464
3465 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3466 q->last_used != index;
3467 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3468 if (txq_id != IWL_CMD_QUEUE_NUM) {
3469 iwl_txstatus_to_ieee(priv,
3470 &(txq->txb[txq->q.last_used]));
3471 iwl_hw_txq_free_tfd(priv, txq);
3472 } else if (nfreed > 1) {
3473 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3474 q->first_empty, q->last_used);
3475 queue_work(priv->workqueue, &priv->restart);
3476 }
3477 nfreed++;
3478 }
3479
3480 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3481 (txq_id != IWL_CMD_QUEUE_NUM) &&
3482 priv->mac80211_registered)
3483 ieee80211_wake_queue(priv->hw, txq_id);
3484
3485
3486 return nfreed;
3487}
3488
3489static int iwl_is_tx_success(u32 status)
3490{
3491 status &= TX_STATUS_MSK;
3492 return (status == TX_STATUS_SUCCESS)
3493 || (status == TX_STATUS_DIRECT_DONE);
3494}
3495
3496/******************************************************************************
3497 *
3498 * Generic RX handler implementations
3499 *
3500 ******************************************************************************/
3501#ifdef CONFIG_IWLWIFI_HT
3502#ifdef CONFIG_IWLWIFI_HT_AGG
3503
3504static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3505 struct ieee80211_hdr *hdr)
3506{
3507 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3508 return IWL_AP_ID;
3509 else {
3510 u8 *da = ieee80211_get_DA(hdr);
3511 return iwl_hw_find_station(priv, da);
3512 }
3513}
3514
3515static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3516 struct iwl_priv *priv, int txq_id, int idx)
3517{
3518 if (priv->txq[txq_id].txb[idx].skb[0])
3519 return (struct ieee80211_hdr *)priv->txq[txq_id].
3520 txb[idx].skb[0]->data;
3521 return NULL;
3522}
3523
3524static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3525{
3526 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3527 tx_resp->frame_count);
3528 return le32_to_cpu(*scd_ssn) & MAX_SN;
3529
3530}
3531static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3532 struct iwl_ht_agg *agg,
3533 struct iwl_tx_resp *tx_resp,
3534 u16 start_idx)
3535{
3536 u32 status;
3537 __le32 *frame_status = &tx_resp->status;
3538 struct ieee80211_tx_status *tx_status = NULL;
3539 struct ieee80211_hdr *hdr = NULL;
3540 int i, sh;
3541 int txq_id, idx;
3542 u16 seq;
3543
3544 if (agg->wait_for_ba)
3545 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3546
3547 agg->frame_count = tx_resp->frame_count;
3548 agg->start_idx = start_idx;
3549 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3550 agg->bitmap0 = agg->bitmap1 = 0;
3551
3552 if (agg->frame_count == 1) {
3553 struct iwl_tx_queue *txq ;
3554 status = le32_to_cpu(frame_status[0]);
3555
3556 txq_id = agg->txq_id;
3557 txq = &priv->txq[txq_id];
3558 /* FIXME: code repetition */
3559 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3560 agg->frame_count, agg->start_idx);
3561
3562 tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
3563 tx_status->retry_count = tx_resp->failure_frame;
3564 tx_status->queue_number = status & 0xff;
3565 tx_status->queue_length = tx_resp->bt_kill_count;
3566 tx_status->queue_length |= tx_resp->failure_rts;
3567
3568 tx_status->flags = iwl_is_tx_success(status)?
3569 IEEE80211_TX_STATUS_ACK : 0;
3570 tx_status->control.tx_rate =
3571 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3572 /* FIXME: code repetition end */
3573
3574 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3575 status & 0xff, tx_resp->failure_frame);
3576 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3577 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3578
3579 agg->wait_for_ba = 0;
3580 } else {
3581 u64 bitmap = 0;
3582 int start = agg->start_idx;
3583
3584 for (i = 0; i < agg->frame_count; i++) {
3585 u16 sc;
3586 status = le32_to_cpu(frame_status[i]);
3587 seq = status >> 16;
3588 idx = SEQ_TO_INDEX(seq);
3589 txq_id = SEQ_TO_QUEUE(seq);
3590
3591 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3592 AGG_TX_STATE_ABORT_MSK))
3593 continue;
3594
3595 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3596 agg->frame_count, txq_id, idx);
3597
3598 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3599
3600 sc = le16_to_cpu(hdr->seq_ctrl);
3601 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3602 IWL_ERROR("BUG_ON idx doesn't match seq control"
3603 " idx=%d, seq_idx=%d, seq=%d\n",
3604 idx, SEQ_TO_SN(sc),
3605 hdr->seq_ctrl);
3606 return -1;
3607 }
3608
3609 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3610 i, idx, SEQ_TO_SN(sc));
3611
3612 sh = idx - start;
3613 if (sh > 64) {
3614 sh = (start - idx) + 0xff;
3615 bitmap = bitmap << sh;
3616 sh = 0;
3617 start = idx;
3618 } else if (sh < -64)
3619 sh = 0xff - (start - idx);
3620 else if (sh < 0) {
3621 sh = start - idx;
3622 start = idx;
3623 bitmap = bitmap << sh;
3624 sh = 0;
3625 }
3626 bitmap |= (1 << sh);
3627 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3628 start, (u32)(bitmap & 0xFFFFFFFF));
3629 }
3630
3631 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3632 agg->bitmap1 = bitmap >> 32;
3633 agg->start_idx = start;
3634 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3635 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3636 agg->frame_count, agg->start_idx,
3637 agg->bitmap0);
3638
3639 if (bitmap)
3640 agg->wait_for_ba = 1;
3641 }
3642 return 0;
3643}
3644#endif
3645#endif
3646
3647static void iwl_rx_reply_tx(struct iwl_priv *priv,
3648 struct iwl_rx_mem_buffer *rxb)
3649{
3650 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3651 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3652 int txq_id = SEQ_TO_QUEUE(sequence);
3653 int index = SEQ_TO_INDEX(sequence);
3654 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3655 struct ieee80211_tx_status *tx_status;
3656 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3657 u32 status = le32_to_cpu(tx_resp->status);
3658#ifdef CONFIG_IWLWIFI_HT
3659#ifdef CONFIG_IWLWIFI_HT_AGG
3660 int tid, sta_id;
3661#endif
3662#endif
3663
3664 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3665 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3666 "is out of range [0-%d] %d %d\n", txq_id,
3667 index, txq->q.n_bd, txq->q.first_empty,
3668 txq->q.last_used);
3669 return;
3670 }
3671
3672#ifdef CONFIG_IWLWIFI_HT
3673#ifdef CONFIG_IWLWIFI_HT_AGG
3674 if (txq->sched_retry) {
3675 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3676 struct ieee80211_hdr *hdr =
3677 iwl_tx_queue_get_hdr(priv, txq_id, index);
3678 struct iwl_ht_agg *agg = NULL;
3679 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3680
3681 if (qc == NULL) {
3682 IWL_ERROR("BUG_ON qc is null!!!!\n");
3683 return;
3684 }
3685
3686 tid = le16_to_cpu(*qc) & 0xf;
3687
3688 sta_id = iwl_get_ra_sta_id(priv, hdr);
3689 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3690 IWL_ERROR("Station not known for\n");
3691 return;
3692 }
3693
3694 agg = &priv->stations[sta_id].tid[tid].agg;
3695
3696 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3697
3698 if ((tx_resp->frame_count == 1) &&
3699 !iwl_is_tx_success(status)) {
3700 /* TODO: send BAR */
3701 }
3702
3703 if ((txq->q.last_used != (scd_ssn & 0xff))) {
3704 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3705 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3706 "%d index %d\n", scd_ssn , index);
3707 iwl_tx_queue_reclaim(priv, txq_id, index);
3708 }
3709 } else {
3710#endif /* CONFIG_IWLWIFI_HT_AGG */
3711#endif /* CONFIG_IWLWIFI_HT */
3712 tx_status = &(txq->txb[txq->q.last_used].status);
3713
3714 tx_status->retry_count = tx_resp->failure_frame;
3715 tx_status->queue_number = status;
3716 tx_status->queue_length = tx_resp->bt_kill_count;
3717 tx_status->queue_length |= tx_resp->failure_rts;
3718
3719 tx_status->flags =
3720 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3721
3722 tx_status->control.tx_rate =
3723 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3724
3725 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3726 "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3727 status, le32_to_cpu(tx_resp->rate_n_flags),
3728 tx_resp->failure_frame);
3729
3730 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3731 if (index != -1)
3732 iwl_tx_queue_reclaim(priv, txq_id, index);
3733#ifdef CONFIG_IWLWIFI_HT
3734#ifdef CONFIG_IWLWIFI_HT_AGG
3735 }
3736#endif /* CONFIG_IWLWIFI_HT_AGG */
3737#endif /* CONFIG_IWLWIFI_HT */
3738
3739 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3740 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3741}
3742
3743
3744static void iwl_rx_reply_alive(struct iwl_priv *priv,
3745 struct iwl_rx_mem_buffer *rxb)
3746{
3747 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3748 struct iwl_alive_resp *palive;
3749 struct delayed_work *pwork;
3750
3751 palive = &pkt->u.alive_frame;
3752
3753 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3754 "0x%01X 0x%01X\n",
3755 palive->is_valid, palive->ver_type,
3756 palive->ver_subtype);
3757
3758 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3759 IWL_DEBUG_INFO("Initialization Alive received.\n");
3760 memcpy(&priv->card_alive_init,
3761 &pkt->u.alive_frame,
3762 sizeof(struct iwl_init_alive_resp));
3763 pwork = &priv->init_alive_start;
3764 } else {
3765 IWL_DEBUG_INFO("Runtime Alive received.\n");
3766 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3767 sizeof(struct iwl_alive_resp));
3768 pwork = &priv->alive_start;
3769 }
3770
3771 /* We delay the ALIVE response by 5ms to
3772 * give the HW RF Kill time to activate... */
3773 if (palive->is_valid == UCODE_VALID_OK)
3774 queue_delayed_work(priv->workqueue, pwork,
3775 msecs_to_jiffies(5));
3776 else
3777 IWL_WARNING("uCode did not respond OK.\n");
3778}
3779
3780static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3781 struct iwl_rx_mem_buffer *rxb)
3782{
3783 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3784
3785 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3786 return;
3787}
3788
3789static void iwl_rx_reply_error(struct iwl_priv *priv,
3790 struct iwl_rx_mem_buffer *rxb)
3791{
3792 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3793
3794 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3795 "seq 0x%04X ser 0x%08X\n",
3796 le32_to_cpu(pkt->u.err_resp.error_type),
3797 get_cmd_string(pkt->u.err_resp.cmd_id),
3798 pkt->u.err_resp.cmd_id,
3799 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3800 le32_to_cpu(pkt->u.err_resp.error_info));
3801}
3802
3803#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3804
3805static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3806{
3807 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3808 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3809 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3810 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3811 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3812 rxon->channel = csa->channel;
3813 priv->staging_rxon.channel = csa->channel;
3814}
3815
3816static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3817 struct iwl_rx_mem_buffer *rxb)
3818{
3819#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3820 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3821 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3822
3823 if (!report->state) {
3824 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3825 "Spectrum Measure Notification: Start\n");
3826 return;
3827 }
3828
3829 memcpy(&priv->measure_report, report, sizeof(*report));
3830 priv->measurement_status |= MEASUREMENT_READY;
3831#endif
3832}
3833
3834static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3835 struct iwl_rx_mem_buffer *rxb)
3836{
3837#ifdef CONFIG_IWLWIFI_DEBUG
3838 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3839 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3840 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3841 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3842#endif
3843}
3844
3845static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3846 struct iwl_rx_mem_buffer *rxb)
3847{
3848 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3849 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3850 "notification for %s:\n",
3851 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3852 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3853}
3854
3855static void iwl_bg_beacon_update(struct work_struct *work)
3856{
3857 struct iwl_priv *priv =
3858 container_of(work, struct iwl_priv, beacon_update);
3859 struct sk_buff *beacon;
3860
3861 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3862 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3863
3864 if (!beacon) {
3865 IWL_ERROR("update beacon failed\n");
3866 return;
3867 }
3868
3869 mutex_lock(&priv->mutex);
3870 /* new beacon skb is allocated every time; dispose previous.*/
3871 if (priv->ibss_beacon)
3872 dev_kfree_skb(priv->ibss_beacon);
3873
3874 priv->ibss_beacon = beacon;
3875 mutex_unlock(&priv->mutex);
3876
3877 iwl_send_beacon_cmd(priv);
3878}
3879
3880static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3881 struct iwl_rx_mem_buffer *rxb)
3882{
3883#ifdef CONFIG_IWLWIFI_DEBUG
3884 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3885 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3886 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3887
3888 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3889 "tsf %d %d rate %d\n",
3890 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3891 beacon->beacon_notify_hdr.failure_frame,
3892 le32_to_cpu(beacon->ibss_mgr_status),
3893 le32_to_cpu(beacon->high_tsf),
3894 le32_to_cpu(beacon->low_tsf), rate);
3895#endif
3896
3897 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3898 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3899 queue_work(priv->workqueue, &priv->beacon_update);
3900}
3901
3902/* Service response to REPLY_SCAN_CMD (0x80) */
3903static void iwl_rx_reply_scan(struct iwl_priv *priv,
3904 struct iwl_rx_mem_buffer *rxb)
3905{
3906#ifdef CONFIG_IWLWIFI_DEBUG
3907 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3908 struct iwl_scanreq_notification *notif =
3909 (struct iwl_scanreq_notification *)pkt->u.raw;
3910
3911 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3912#endif
3913}
3914
3915/* Service SCAN_START_NOTIFICATION (0x82) */
3916static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3917 struct iwl_rx_mem_buffer *rxb)
3918{
3919 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3920 struct iwl_scanstart_notification *notif =
3921 (struct iwl_scanstart_notification *)pkt->u.raw;
3922 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3923 IWL_DEBUG_SCAN("Scan start: "
3924 "%d [802.11%s] "
3925 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3926 notif->channel,
3927 notif->band ? "bg" : "a",
3928 notif->tsf_high,
3929 notif->tsf_low, notif->status, notif->beacon_timer);
3930}
3931
3932/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3933static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3934 struct iwl_rx_mem_buffer *rxb)
3935{
3936 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3937 struct iwl_scanresults_notification *notif =
3938 (struct iwl_scanresults_notification *)pkt->u.raw;
3939
3940 IWL_DEBUG_SCAN("Scan ch.res: "
3941 "%d [802.11%s] "
3942 "(TSF: 0x%08X:%08X) - %d "
3943 "elapsed=%lu usec (%dms since last)\n",
3944 notif->channel,
3945 notif->band ? "bg" : "a",
3946 le32_to_cpu(notif->tsf_high),
3947 le32_to_cpu(notif->tsf_low),
3948 le32_to_cpu(notif->statistics[0]),
3949 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3950 jiffies_to_msecs(elapsed_jiffies
3951 (priv->last_scan_jiffies, jiffies)));
3952
3953 priv->last_scan_jiffies = jiffies;
3954}
3955
3956/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3957static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3958 struct iwl_rx_mem_buffer *rxb)
3959{
3960 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3961 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3962
3963 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3964 scan_notif->scanned_channels,
3965 scan_notif->tsf_low,
3966 scan_notif->tsf_high, scan_notif->status);
3967
3968 /* The HW is no longer scanning */
3969 clear_bit(STATUS_SCAN_HW, &priv->status);
3970
3971 /* The scan completion notification came in, so kill that timer... */
3972 cancel_delayed_work(&priv->scan_check);
3973
3974 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3975 (priv->scan_bands == 2) ? "2.4" : "5.2",
3976 jiffies_to_msecs(elapsed_jiffies
3977 (priv->scan_pass_start, jiffies)));
3978
3979 /* Remove this scanned band from the list
3980 * of pending bands to scan */
3981 priv->scan_bands--;
3982
3983 /* If a request to abort was given, or the scan did not succeed
3984 * then we reset the scan state machine and terminate,
3985 * re-queuing another scan if one has been requested */
3986 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3987 IWL_DEBUG_INFO("Aborted scan completed.\n");
3988 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3989 } else {
3990 /* If there are more bands on this scan pass reschedule */
3991 if (priv->scan_bands > 0)
3992 goto reschedule;
3993 }
3994
3995 priv->last_scan_jiffies = jiffies;
3996 IWL_DEBUG_INFO("Setting scan to off\n");
3997
3998 clear_bit(STATUS_SCANNING, &priv->status);
3999
4000 IWL_DEBUG_INFO("Scan took %dms\n",
4001 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4002
4003 queue_work(priv->workqueue, &priv->scan_completed);
4004
4005 return;
4006
4007reschedule:
4008 priv->scan_pass_start = jiffies;
4009 queue_work(priv->workqueue, &priv->request_scan);
4010}
4011
4012/* Handle notification from uCode that card's power state is changing
4013 * due to software, hardware, or critical temperature RFKILL */
4014static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4015 struct iwl_rx_mem_buffer *rxb)
4016{
4017 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4018 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4019 unsigned long status = priv->status;
4020
4021 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4022 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4023 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4024
4025 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4026 RF_CARD_DISABLED)) {
4027
4028 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4029 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4030
4031 if (!iwl_grab_restricted_access(priv)) {
4032 iwl_write_restricted(
4033 priv, HBUS_TARG_MBX_C,
4034 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4035
4036 iwl_release_restricted_access(priv);
4037 }
4038
4039 if (!(flags & RXON_CARD_DISABLED)) {
4040 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4041 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4042 if (!iwl_grab_restricted_access(priv)) {
4043 iwl_write_restricted(
4044 priv, HBUS_TARG_MBX_C,
4045 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4046
4047 iwl_release_restricted_access(priv);
4048 }
4049 }
4050
4051 if (flags & RF_CARD_DISABLED) {
4052 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4053 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4054 iwl_read32(priv, CSR_UCODE_DRV_GP1);
4055 if (!iwl_grab_restricted_access(priv))
4056 iwl_release_restricted_access(priv);
4057 }
4058 }
4059
4060 if (flags & HW_CARD_DISABLED)
4061 set_bit(STATUS_RF_KILL_HW, &priv->status);
4062 else
4063 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4064
4065
4066 if (flags & SW_CARD_DISABLED)
4067 set_bit(STATUS_RF_KILL_SW, &priv->status);
4068 else
4069 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4070
4071 if (!(flags & RXON_CARD_DISABLED))
4072 iwl_scan_cancel(priv);
4073
4074 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4075 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4076 (test_bit(STATUS_RF_KILL_SW, &status) !=
4077 test_bit(STATUS_RF_KILL_SW, &priv->status)))
4078 queue_work(priv->workqueue, &priv->rf_kill);
4079 else
4080 wake_up_interruptible(&priv->wait_command_queue);
4081}
4082
4083/**
4084 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4085 *
4086 * Setup the RX handlers for each of the reply types sent from the uCode
4087 * to the host.
4088 *
4089 * This function chains into the hardware specific files for them to setup
4090 * any hardware specific handlers as well.
4091 */
4092static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4093{
4094 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4095 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4096 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4097 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4098 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4099 iwl_rx_spectrum_measure_notif;
4100 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4101 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4102 iwl_rx_pm_debug_statistics_notif;
4103 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4104
4105 /* NOTE: iwl_rx_statistics is different based on whether
4106 * the build is for the 3945 or the 4965. See the
4107 * corresponding implementation in iwl-XXXX.c
4108 *
4109 * The same handler is used for both the REPLY to a
4110 * discrete statistics request from the host as well as
4111 * for the periodic statistics notification from the uCode
4112 */
4113 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4114 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4115
4116 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4117 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4118 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4119 iwl_rx_scan_results_notif;
4120 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4121 iwl_rx_scan_complete_notif;
4122 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4123 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4124
4125 /* Setup hardware specific Rx handlers */
4126 iwl_hw_rx_handler_setup(priv);
4127}
4128
4129/**
4130 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4131 * @rxb: Rx buffer to reclaim
4132 *
4133 * If an Rx buffer has an async callback associated with it the callback
4134 * will be executed. The attached skb (if present) will only be freed
4135 * if the callback returns 1
4136 */
4137static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4138 struct iwl_rx_mem_buffer *rxb)
4139{
4140 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4141 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4142 int txq_id = SEQ_TO_QUEUE(sequence);
4143 int index = SEQ_TO_INDEX(sequence);
4144 int huge = sequence & SEQ_HUGE_FRAME;
4145 int cmd_index;
4146 struct iwl_cmd *cmd;
4147
4148 /* If a Tx command is being handled and it isn't in the actual
4149 * command queue then there a command routing bug has been introduced
4150 * in the queue management code. */
4151 if (txq_id != IWL_CMD_QUEUE_NUM)
4152 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4153 txq_id, pkt->hdr.cmd);
4154 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4155
4156 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4157 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4158
4159 /* Input error checking is done when commands are added to queue. */
4160 if (cmd->meta.flags & CMD_WANT_SKB) {
4161 cmd->meta.source->u.skb = rxb->skb;
4162 rxb->skb = NULL;
4163 } else if (cmd->meta.u.callback &&
4164 !cmd->meta.u.callback(priv, cmd, rxb->skb))
4165 rxb->skb = NULL;
4166
4167 iwl_tx_queue_reclaim(priv, txq_id, index);
4168
4169 if (!(cmd->meta.flags & CMD_ASYNC)) {
4170 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4171 wake_up_interruptible(&priv->wait_command_queue);
4172 }
4173}
4174
4175/************************** RX-FUNCTIONS ****************************/
4176/*
4177 * Rx theory of operation
4178 *
4179 * The host allocates 32 DMA target addresses and passes the host address
4180 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4181 * 0 to 31
4182 *
4183 * Rx Queue Indexes
4184 * The host/firmware share two index registers for managing the Rx buffers.
4185 *
4186 * The READ index maps to the first position that the firmware may be writing
4187 * to -- the driver can read up to (but not including) this position and get
4188 * good data.
4189 * The READ index is managed by the firmware once the card is enabled.
4190 *
4191 * The WRITE index maps to the last position the driver has read from -- the
4192 * position preceding WRITE is the last slot the firmware can place a packet.
4193 *
4194 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4195 * WRITE = READ.
4196 *
4197 * During initialization the host sets up the READ queue position to the first
4198 * INDEX position, and WRITE to the last (READ - 1 wrapped)
4199 *
4200 * When the firmware places a packet in a buffer it will advance the READ index
4201 * and fire the RX interrupt. The driver can then query the READ index and
4202 * process as many packets as possible, moving the WRITE index forward as it
4203 * resets the Rx queue buffers with new memory.
4204 *
4205 * The management in the driver is as follows:
4206 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
4207 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4208 * to replensish the iwl->rxq->rx_free.
4209 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4210 * iwl->rxq is replenished and the READ INDEX is updated (updating the
4211 * 'processed' and 'read' driver indexes as well)
4212 * + A received packet is processed and handed to the kernel network stack,
4213 * detached from the iwl->rxq. The driver 'processed' index is updated.
4214 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4215 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4216 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
4217 * were enough free buffers and RX_STALLED is set it is cleared.
4218 *
4219 *
4220 * Driver sequence:
4221 *
4222 * iwl_rx_queue_alloc() Allocates rx_free
4223 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
4224 * iwl_rx_queue_restock
4225 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
4226 * queue, updates firmware pointers, and updates
4227 * the WRITE index. If insufficient rx_free buffers
4228 * are available, schedules iwl_rx_replenish
4229 *
4230 * -- enable interrupts --
4231 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
4232 * READ INDEX, detaching the SKB from the pool.
4233 * Moves the packet buffer from queue to rx_used.
4234 * Calls iwl_rx_queue_restock to refill any empty
4235 * slots.
4236 * ...
4237 *
4238 */
4239
4240/**
4241 * iwl_rx_queue_space - Return number of free slots available in queue.
4242 */
4243static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4244{
4245 int s = q->read - q->write;
4246 if (s <= 0)
4247 s += RX_QUEUE_SIZE;
4248 /* keep some buffer to not confuse full and empty queue */
4249 s -= 2;
4250 if (s < 0)
4251 s = 0;
4252 return s;
4253}
4254
4255/**
4256 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4257 *
4258 * NOTE: This function has 3945 and 4965 specific code sections
4259 * but is declared in base due to the majority of the
4260 * implementation being the same (only a numeric constant is
4261 * different)
4262 *
4263 */
4264int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4265{
4266 u32 reg = 0;
4267 int rc = 0;
4268 unsigned long flags;
4269
4270 spin_lock_irqsave(&q->lock, flags);
4271
4272 if (q->need_update == 0)
4273 goto exit_unlock;
4274
4275 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4276 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4277
4278 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4279 iwl_set_bit(priv, CSR_GP_CNTRL,
4280 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4281 goto exit_unlock;
4282 }
4283
4284 rc = iwl_grab_restricted_access(priv);
4285 if (rc)
4286 goto exit_unlock;
4287
4288 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4289 q->write & ~0x7);
4290 iwl_release_restricted_access(priv);
4291 } else
4292 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4293
4294
4295 q->need_update = 0;
4296
4297 exit_unlock:
4298 spin_unlock_irqrestore(&q->lock, flags);
4299 return rc;
4300}
4301
4302/**
4303 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4304 *
4305 * NOTE: This function has 3945 and 4965 specific code paths in it.
4306 */
4307static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4308 dma_addr_t dma_addr)
4309{
4310 return cpu_to_le32((u32)(dma_addr >> 8));
4311}
4312
4313
4314/**
4315 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4316 *
4317 * If there are slots in the RX queue that need to be restocked,
4318 * and we have free pre-allocated buffers, fill the ranks as much
4319 * as we can pulling from rx_free.
4320 *
4321 * This moves the 'write' index forward to catch up with 'processed', and
4322 * also updates the memory address in the firmware to reference the new
4323 * target buffer.
4324 */
4325int iwl_rx_queue_restock(struct iwl_priv *priv)
4326{
4327 struct iwl_rx_queue *rxq = &priv->rxq;
4328 struct list_head *element;
4329 struct iwl_rx_mem_buffer *rxb;
4330 unsigned long flags;
4331 int write, rc;
4332
4333 spin_lock_irqsave(&rxq->lock, flags);
4334 write = rxq->write & ~0x7;
4335 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4336 element = rxq->rx_free.next;
4337 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4338 list_del(element);
4339 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4340 rxq->queue[rxq->write] = rxb;
4341 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4342 rxq->free_count--;
4343 }
4344 spin_unlock_irqrestore(&rxq->lock, flags);
4345 /* If the pre-allocated buffer pool is dropping low, schedule to
4346 * refill it */
4347 if (rxq->free_count <= RX_LOW_WATERMARK)
4348 queue_work(priv->workqueue, &priv->rx_replenish);
4349
4350
4351 /* If we've added more space for the firmware to place data, tell it */
4352 if ((write != (rxq->write & ~0x7))
4353 || (abs(rxq->write - rxq->read) > 7)) {
4354 spin_lock_irqsave(&rxq->lock, flags);
4355 rxq->need_update = 1;
4356 spin_unlock_irqrestore(&rxq->lock, flags);
4357 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4358 if (rc)
4359 return rc;
4360 }
4361
4362 return 0;
4363}
4364
4365/**
4366 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4367 *
4368 * When moving to rx_free an SKB is allocated for the slot.
4369 *
4370 * Also restock the Rx queue via iwl_rx_queue_restock.
4371 * This is called as a scheduled work item (except for during intialization)
4372 */
4373void iwl_rx_replenish(void *data)
4374{
4375 struct iwl_priv *priv = data;
4376 struct iwl_rx_queue *rxq = &priv->rxq;
4377 struct list_head *element;
4378 struct iwl_rx_mem_buffer *rxb;
4379 unsigned long flags;
4380 spin_lock_irqsave(&rxq->lock, flags);
4381 while (!list_empty(&rxq->rx_used)) {
4382 element = rxq->rx_used.next;
4383 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4384 rxb->skb =
4385 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4386 if (!rxb->skb) {
4387 if (net_ratelimit())
4388 printk(KERN_CRIT DRV_NAME
4389 ": Can not allocate SKB buffers\n");
4390 /* We don't reschedule replenish work here -- we will
4391 * call the restock method and if it still needs
4392 * more buffers it will schedule replenish */
4393 break;
4394 }
4395 priv->alloc_rxb_skb++;
4396 list_del(element);
4397 rxb->dma_addr =
4398 pci_map_single(priv->pci_dev, rxb->skb->data,
4399 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4400 list_add_tail(&rxb->list, &rxq->rx_free);
4401 rxq->free_count++;
4402 }
4403 spin_unlock_irqrestore(&rxq->lock, flags);
4404
4405 spin_lock_irqsave(&priv->lock, flags);
4406 iwl_rx_queue_restock(priv);
4407 spin_unlock_irqrestore(&priv->lock, flags);
4408}
4409
4410/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4411 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4412 * This free routine walks the list of POOL entries and if SKB is set to
4413 * non NULL it is unmapped and freed
4414 */
4415void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4416{
4417 int i;
4418 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4419 if (rxq->pool[i].skb != NULL) {
4420 pci_unmap_single(priv->pci_dev,
4421 rxq->pool[i].dma_addr,
4422 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4423 dev_kfree_skb(rxq->pool[i].skb);
4424 }
4425 }
4426
4427 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4428 rxq->dma_addr);
4429 rxq->bd = NULL;
4430}
4431
4432int iwl_rx_queue_alloc(struct iwl_priv *priv)
4433{
4434 struct iwl_rx_queue *rxq = &priv->rxq;
4435 struct pci_dev *dev = priv->pci_dev;
4436 int i;
4437
4438 spin_lock_init(&rxq->lock);
4439 INIT_LIST_HEAD(&rxq->rx_free);
4440 INIT_LIST_HEAD(&rxq->rx_used);
4441 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4442 if (!rxq->bd)
4443 return -ENOMEM;
4444 /* Fill the rx_used queue with _all_ of the Rx buffers */
4445 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4446 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4447 /* Set us so that we have processed and used all buffers, but have
4448 * not restocked the Rx queue with fresh buffers */
4449 rxq->read = rxq->write = 0;
4450 rxq->free_count = 0;
4451 rxq->need_update = 0;
4452 return 0;
4453}
4454
4455void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4456{
4457 unsigned long flags;
4458 int i;
4459 spin_lock_irqsave(&rxq->lock, flags);
4460 INIT_LIST_HEAD(&rxq->rx_free);
4461 INIT_LIST_HEAD(&rxq->rx_used);
4462 /* Fill the rx_used queue with _all_ of the Rx buffers */
4463 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4464 /* In the reset function, these buffers may have been allocated
4465 * to an SKB, so we need to unmap and free potential storage */
4466 if (rxq->pool[i].skb != NULL) {
4467 pci_unmap_single(priv->pci_dev,
4468 rxq->pool[i].dma_addr,
4469 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4470 priv->alloc_rxb_skb--;
4471 dev_kfree_skb(rxq->pool[i].skb);
4472 rxq->pool[i].skb = NULL;
4473 }
4474 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4475 }
4476
4477 /* Set us so that we have processed and used all buffers, but have
4478 * not restocked the Rx queue with fresh buffers */
4479 rxq->read = rxq->write = 0;
4480 rxq->free_count = 0;
4481 spin_unlock_irqrestore(&rxq->lock, flags);
4482}
4483
4484/* Convert linear signal-to-noise ratio into dB */
4485static u8 ratio2dB[100] = {
4486/* 0 1 2 3 4 5 6 7 8 9 */
4487 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4488 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4489 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4490 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4491 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4492 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4493 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4494 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4495 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4496 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4497};
4498
4499/* Calculates a relative dB value from a ratio of linear
4500 * (i.e. not dB) signal levels.
4501 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4502int iwl_calc_db_from_ratio(int sig_ratio)
4503{
4504 /* Anything above 1000:1 just report as 60 dB */
4505 if (sig_ratio > 1000)
4506 return 60;
4507
4508 /* Above 100:1, divide by 10 and use table,
4509 * add 20 dB to make up for divide by 10 */
4510 if (sig_ratio > 100)
4511 return (20 + (int)ratio2dB[sig_ratio/10]);
4512
4513 /* We shouldn't see this */
4514 if (sig_ratio < 1)
4515 return 0;
4516
4517 /* Use table for ratios 1:1 - 99:1 */
4518 return (int)ratio2dB[sig_ratio];
4519}
4520
4521#define PERFECT_RSSI (-20) /* dBm */
4522#define WORST_RSSI (-95) /* dBm */
4523#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4524
4525/* Calculate an indication of rx signal quality (a percentage, not dBm!).
4526 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4527 * about formulas used below. */
4528int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4529{
4530 int sig_qual;
4531 int degradation = PERFECT_RSSI - rssi_dbm;
4532
4533 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4534 * as indicator; formula is (signal dbm - noise dbm).
4535 * SNR at or above 40 is a great signal (100%).
4536 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4537 * Weakest usable signal is usually 10 - 15 dB SNR. */
4538 if (noise_dbm) {
4539 if (rssi_dbm - noise_dbm >= 40)
4540 return 100;
4541 else if (rssi_dbm < noise_dbm)
4542 return 0;
4543 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4544
4545 /* Else use just the signal level.
4546 * This formula is a least squares fit of data points collected and
4547 * compared with a reference system that had a percentage (%) display
4548 * for signal quality. */
4549 } else
4550 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4551 (15 * RSSI_RANGE + 62 * degradation)) /
4552 (RSSI_RANGE * RSSI_RANGE);
4553
4554 if (sig_qual > 100)
4555 sig_qual = 100;
4556 else if (sig_qual < 1)
4557 sig_qual = 0;
4558
4559 return sig_qual;
4560}
4561
4562/**
4563 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4564 *
4565 * Uses the priv->rx_handlers callback function array to invoke
4566 * the appropriate handlers, including command responses,
4567 * frame-received notifications, and other notifications.
4568 */
4569static void iwl_rx_handle(struct iwl_priv *priv)
4570{
4571 struct iwl_rx_mem_buffer *rxb;
4572 struct iwl_rx_packet *pkt;
4573 struct iwl_rx_queue *rxq = &priv->rxq;
4574 u32 r, i;
4575 int reclaim;
4576 unsigned long flags;
4577
4578 r = iwl_hw_get_rx_read(priv);
4579 i = rxq->read;
4580
4581 /* Rx interrupt, but nothing sent from uCode */
4582 if (i == r)
4583 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4584
4585 while (i != r) {
4586 rxb = rxq->queue[i];
4587
4588 /* If an RXB doesn't have a queue slot associated with it
4589 * then a bug has been introduced in the queue refilling
4590 * routines -- catch it here */
4591 BUG_ON(rxb == NULL);
4592
4593 rxq->queue[i] = NULL;
4594
4595 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4596 IWL_RX_BUF_SIZE,
4597 PCI_DMA_FROMDEVICE);
4598 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4599
4600 /* Reclaim a command buffer only if this packet is a response
4601 * to a (driver-originated) command.
4602 * If the packet (e.g. Rx frame) originated from uCode,
4603 * there is no command buffer to reclaim.
4604 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4605 * but apparently a few don't get set; catch them here. */
4606 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4607 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4608 (pkt->hdr.cmd != REPLY_4965_RX) &&
4609 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4610 (pkt->hdr.cmd != REPLY_TX);
4611
4612 /* Based on type of command response or notification,
4613 * handle those that need handling via function in
4614 * rx_handlers table. See iwl_setup_rx_handlers() */
4615 if (priv->rx_handlers[pkt->hdr.cmd]) {
4616 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4617 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4618 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4619 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4620 } else {
4621 /* No handling needed */
4622 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4623 "r %d i %d No handler needed for %s, 0x%02x\n",
4624 r, i, get_cmd_string(pkt->hdr.cmd),
4625 pkt->hdr.cmd);
4626 }
4627
4628 if (reclaim) {
4629 /* Invoke any callbacks, transfer the skb to caller,
4630 * and fire off the (possibly) blocking iwl_send_cmd()
4631 * as we reclaim the driver command queue */
4632 if (rxb && rxb->skb)
4633 iwl_tx_cmd_complete(priv, rxb);
4634 else
4635 IWL_WARNING("Claim null rxb?\n");
4636 }
4637
4638 /* For now we just don't re-use anything. We can tweak this
4639 * later to try and re-use notification packets and SKBs that
4640 * fail to Rx correctly */
4641 if (rxb->skb != NULL) {
4642 priv->alloc_rxb_skb--;
4643 dev_kfree_skb_any(rxb->skb);
4644 rxb->skb = NULL;
4645 }
4646
4647 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4648 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4649 spin_lock_irqsave(&rxq->lock, flags);
4650 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4651 spin_unlock_irqrestore(&rxq->lock, flags);
4652 i = (i + 1) & RX_QUEUE_MASK;
4653 }
4654
4655 /* Backtrack one entry */
4656 priv->rxq.read = i;
4657 iwl_rx_queue_restock(priv);
4658}
4659
4660int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4661 struct iwl_tx_queue *txq)
4662{
4663 u32 reg = 0;
4664 int rc = 0;
4665 int txq_id = txq->q.id;
4666
4667 if (txq->need_update == 0)
4668 return rc;
4669
4670 /* if we're trying to save power */
4671 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4672 /* wake up nic if it's powered down ...
4673 * uCode will wake up, and interrupt us again, so next
4674 * time we'll skip this part. */
4675 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4676
4677 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4678 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4679 iwl_set_bit(priv, CSR_GP_CNTRL,
4680 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4681 return rc;
4682 }
4683
4684 /* restore this queue's parameters in nic hardware. */
4685 rc = iwl_grab_restricted_access(priv);
4686 if (rc)
4687 return rc;
4688 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4689 txq->q.first_empty | (txq_id << 8));
4690 iwl_release_restricted_access(priv);
4691
4692 /* else not in power-save mode, uCode will never sleep when we're
4693 * trying to tx (during RFKILL, we're not trying to tx). */
4694 } else
4695 iwl_write32(priv, HBUS_TARG_WRPTR,
4696 txq->q.first_empty | (txq_id << 8));
4697
4698 txq->need_update = 0;
4699
4700 return rc;
4701}
4702
4703#ifdef CONFIG_IWLWIFI_DEBUG
4704static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4705{
4706 IWL_DEBUG_RADIO("RX CONFIG:\n");
4707 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4708 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4709 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4710 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4711 le32_to_cpu(rxon->filter_flags));
4712 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4713 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4714 rxon->ofdm_basic_rates);
4715 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4716 IWL_DEBUG_RADIO("u8[6] node_addr: " MAC_FMT "\n",
4717 MAC_ARG(rxon->node_addr));
4718 IWL_DEBUG_RADIO("u8[6] bssid_addr: " MAC_FMT "\n",
4719 MAC_ARG(rxon->bssid_addr));
4720 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4721}
4722#endif
4723
4724static void iwl_enable_interrupts(struct iwl_priv *priv)
4725{
4726 IWL_DEBUG_ISR("Enabling interrupts\n");
4727 set_bit(STATUS_INT_ENABLED, &priv->status);
4728 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4729}
4730
4731static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4732{
4733 clear_bit(STATUS_INT_ENABLED, &priv->status);
4734
4735 /* disable interrupts from uCode/NIC to host */
4736 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4737
4738 /* acknowledge/clear/reset any interrupts still pending
4739 * from uCode or flow handler (Rx/Tx DMA) */
4740 iwl_write32(priv, CSR_INT, 0xffffffff);
4741 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4742 IWL_DEBUG_ISR("Disabled interrupts\n");
4743}
4744
4745static const char *desc_lookup(int i)
4746{
4747 switch (i) {
4748 case 1:
4749 return "FAIL";
4750 case 2:
4751 return "BAD_PARAM";
4752 case 3:
4753 return "BAD_CHECKSUM";
4754 case 4:
4755 return "NMI_INTERRUPT";
4756 case 5:
4757 return "SYSASSERT";
4758 case 6:
4759 return "FATAL_ERROR";
4760 }
4761
4762 return "UNKNOWN";
4763}
4764
4765#define ERROR_START_OFFSET (1 * sizeof(u32))
4766#define ERROR_ELEM_SIZE (7 * sizeof(u32))
4767
4768static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4769{
4770 u32 data2, line;
4771 u32 desc, time, count, base, data1;
4772 u32 blink1, blink2, ilink1, ilink2;
4773 int rc;
4774
4775 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4776
4777 if (!iwl_hw_valid_rtc_data_addr(base)) {
4778 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4779 return;
4780 }
4781
4782 rc = iwl_grab_restricted_access(priv);
4783 if (rc) {
4784 IWL_WARNING("Can not read from adapter at this time.\n");
4785 return;
4786 }
4787
4788 count = iwl_read_restricted_mem(priv, base);
4789
4790 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4791 IWL_ERROR("Start IWL Error Log Dump:\n");
4792 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4793 priv->status, priv->config, count);
4794 }
4795
4796 desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4797 blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4798 blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4799 ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4800 ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4801 data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4802 data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4803 line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4804 time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4805
4806 IWL_ERROR("Desc Time "
4807 "data1 data2 line\n");
4808 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4809 desc_lookup(desc), desc, time, data1, data2, line);
4810 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4811 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4812 ilink1, ilink2);
4813
4814 iwl_release_restricted_access(priv);
4815}
4816
4817#define EVENT_START_OFFSET (4 * sizeof(u32))
4818
4819/**
4820 * iwl_print_event_log - Dump error event log to syslog
4821 *
4822 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4823 */
4824static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4825 u32 num_events, u32 mode)
4826{
4827 u32 i;
4828 u32 base; /* SRAM byte address of event log header */
4829 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4830 u32 ptr; /* SRAM byte address of log data */
4831 u32 ev, time, data; /* event log data */
4832
4833 if (num_events == 0)
4834 return;
4835
4836 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4837
4838 if (mode == 0)
4839 event_size = 2 * sizeof(u32);
4840 else
4841 event_size = 3 * sizeof(u32);
4842
4843 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4844
4845 /* "time" is actually "data" for mode 0 (no timestamp).
4846 * place event id # at far right for easier visual parsing. */
4847 for (i = 0; i < num_events; i++) {
4848 ev = iwl_read_restricted_mem(priv, ptr);
4849 ptr += sizeof(u32);
4850 time = iwl_read_restricted_mem(priv, ptr);
4851 ptr += sizeof(u32);
4852 if (mode == 0)
4853 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4854 else {
4855 data = iwl_read_restricted_mem(priv, ptr);
4856 ptr += sizeof(u32);
4857 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4858 }
4859 }
4860}
4861
4862static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4863{
4864 int rc;
4865 u32 base; /* SRAM byte address of event log header */
4866 u32 capacity; /* event log capacity in # entries */
4867 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4868 u32 num_wraps; /* # times uCode wrapped to top of log */
4869 u32 next_entry; /* index of next entry to be written by uCode */
4870 u32 size; /* # entries that we'll print */
4871
4872 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4873 if (!iwl_hw_valid_rtc_data_addr(base)) {
4874 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4875 return;
4876 }
4877
4878 rc = iwl_grab_restricted_access(priv);
4879 if (rc) {
4880 IWL_WARNING("Can not read from adapter at this time.\n");
4881 return;
4882 }
4883
4884 /* event log header */
4885 capacity = iwl_read_restricted_mem(priv, base);
4886 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4887 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4888 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4889
4890 size = num_wraps ? capacity : next_entry;
4891
4892 /* bail out if nothing in log */
4893 if (size == 0) {
4894 IWL_ERROR("Start IPW Event Log Dump: nothing in log\n");
4895 iwl_release_restricted_access(priv);
4896 return;
4897 }
4898
4899 IWL_ERROR("Start IPW Event Log Dump: display count %d, wraps %d\n",
4900 size, num_wraps);
4901
4902 /* if uCode has wrapped back to top of log, start at the oldest entry,
4903 * i.e the next one that uCode would fill. */
4904 if (num_wraps)
4905 iwl_print_event_log(priv, next_entry,
4906 capacity - next_entry, mode);
4907
4908 /* (then/else) start at top of log */
4909 iwl_print_event_log(priv, 0, next_entry, mode);
4910
4911 iwl_release_restricted_access(priv);
4912}
4913
4914/**
4915 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4916 */
4917static void iwl_irq_handle_error(struct iwl_priv *priv)
4918{
4919 /* Set the FW error flag -- cleared on iwl_down */
4920 set_bit(STATUS_FW_ERROR, &priv->status);
4921
4922 /* Cancel currently queued command. */
4923 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4924
4925#ifdef CONFIG_IWLWIFI_DEBUG
4926 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4927 iwl_dump_nic_error_log(priv);
4928 iwl_dump_nic_event_log(priv);
4929 iwl_print_rx_config_cmd(&priv->staging_rxon);
4930 }
4931#endif
4932
4933 wake_up_interruptible(&priv->wait_command_queue);
4934
4935 /* Keep the restart process from trying to send host
4936 * commands by clearing the INIT status bit */
4937 clear_bit(STATUS_READY, &priv->status);
4938
4939 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4940 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4941 "Restarting adapter due to uCode error.\n");
4942
4943 if (iwl_is_associated(priv)) {
4944 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4945 sizeof(priv->recovery_rxon));
4946 priv->error_recovering = 1;
4947 }
4948 queue_work(priv->workqueue, &priv->restart);
4949 }
4950}
4951
4952static void iwl_error_recovery(struct iwl_priv *priv)
4953{
4954 unsigned long flags;
4955
4956 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4957 sizeof(priv->staging_rxon));
4958 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4959 iwl_commit_rxon(priv);
4960
4961 iwl_rxon_add_station(priv, priv->bssid, 1);
4962
4963 spin_lock_irqsave(&priv->lock, flags);
4964 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4965 priv->error_recovering = 0;
4966 spin_unlock_irqrestore(&priv->lock, flags);
4967}
4968
4969static void iwl_irq_tasklet(struct iwl_priv *priv)
4970{
4971 u32 inta, handled = 0;
4972 u32 inta_fh;
4973 unsigned long flags;
4974#ifdef CONFIG_IWLWIFI_DEBUG
4975 u32 inta_mask;
4976#endif
4977
4978 spin_lock_irqsave(&priv->lock, flags);
4979
4980 /* Ack/clear/reset pending uCode interrupts.
4981 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4982 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4983 inta = iwl_read32(priv, CSR_INT);
4984 iwl_write32(priv, CSR_INT, inta);
4985
4986 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4987 * Any new interrupts that happen after this, either while we're
4988 * in this tasklet, or later, will show up in next ISR/tasklet. */
4989 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4990 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4991
4992#ifdef CONFIG_IWLWIFI_DEBUG
4993 if (iwl_debug_level & IWL_DL_ISR) {
4994 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4995 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4996 inta, inta_mask, inta_fh);
4997 }
4998#endif
4999
5000 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5001 * atomic, make sure that inta covers all the interrupts that
5002 * we've discovered, even if FH interrupt came in just after
5003 * reading CSR_INT. */
5004 if (inta_fh & CSR_FH_INT_RX_MASK)
5005 inta |= CSR_INT_BIT_FH_RX;
5006 if (inta_fh & CSR_FH_INT_TX_MASK)
5007 inta |= CSR_INT_BIT_FH_TX;
5008
5009 /* Now service all interrupt bits discovered above. */
5010 if (inta & CSR_INT_BIT_HW_ERR) {
5011 IWL_ERROR("Microcode HW error detected. Restarting.\n");
5012
5013 /* Tell the device to stop sending interrupts */
5014 iwl_disable_interrupts(priv);
5015
5016 iwl_irq_handle_error(priv);
5017
5018 handled |= CSR_INT_BIT_HW_ERR;
5019
5020 spin_unlock_irqrestore(&priv->lock, flags);
5021
5022 return;
5023 }
5024
5025#ifdef CONFIG_IWLWIFI_DEBUG
5026 if (iwl_debug_level & (IWL_DL_ISR)) {
5027 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5028 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5029 IWL_DEBUG_ISR("Microcode started or stopped.\n");
5030
5031 /* Alive notification via Rx interrupt will do the real work */
5032 if (inta & CSR_INT_BIT_ALIVE)
5033 IWL_DEBUG_ISR("Alive interrupt\n");
5034 }
5035#endif
5036 /* Safely ignore these bits for debug checks below */
5037 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5038
5039 /* HW RF KILL switch toggled (4965 only) */
5040 if (inta & CSR_INT_BIT_RF_KILL) {
5041 int hw_rf_kill = 0;
5042 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5043 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5044 hw_rf_kill = 1;
5045
5046 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5047 "RF_KILL bit toggled to %s.\n",
5048 hw_rf_kill ? "disable radio":"enable radio");
5049
5050 /* Queue restart only if RF_KILL switch was set to "kill"
5051 * when we loaded driver, and is now set to "enable".
5052 * After we're Alive, RF_KILL gets handled by
5053 * iwl_rx_card_state_notif() */
5054 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
5055 queue_work(priv->workqueue, &priv->restart);
5056
5057 handled |= CSR_INT_BIT_RF_KILL;
5058 }
5059
5060 /* Chip got too hot and stopped itself (4965 only) */
5061 if (inta & CSR_INT_BIT_CT_KILL) {
5062 IWL_ERROR("Microcode CT kill error detected.\n");
5063 handled |= CSR_INT_BIT_CT_KILL;
5064 }
5065
5066 /* Error detected by uCode */
5067 if (inta & CSR_INT_BIT_SW_ERR) {
5068 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
5069 inta);
5070 iwl_irq_handle_error(priv);
5071 handled |= CSR_INT_BIT_SW_ERR;
5072 }
5073
5074 /* uCode wakes up after power-down sleep */
5075 if (inta & CSR_INT_BIT_WAKEUP) {
5076 IWL_DEBUG_ISR("Wakeup interrupt\n");
5077 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5078 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5079 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5080 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5081 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5082 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5083 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5084
5085 handled |= CSR_INT_BIT_WAKEUP;
5086 }
5087
5088 /* All uCode command responses, including Tx command responses,
5089 * Rx "responses" (frame-received notification), and other
5090 * notifications from uCode come through here*/
5091 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5092 iwl_rx_handle(priv);
5093 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5094 }
5095
5096 if (inta & CSR_INT_BIT_FH_TX) {
5097 IWL_DEBUG_ISR("Tx interrupt\n");
5098 handled |= CSR_INT_BIT_FH_TX;
5099 }
5100
5101 if (inta & ~handled)
5102 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5103
5104 if (inta & ~CSR_INI_SET_MASK) {
5105 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5106 inta & ~CSR_INI_SET_MASK);
5107 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
5108 }
5109
5110 /* Re-enable all interrupts */
5111 iwl_enable_interrupts(priv);
5112
5113#ifdef CONFIG_IWLWIFI_DEBUG
5114 if (iwl_debug_level & (IWL_DL_ISR)) {
5115 inta = iwl_read32(priv, CSR_INT);
5116 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5117 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5118 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5119 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5120 }
5121#endif
5122 spin_unlock_irqrestore(&priv->lock, flags);
5123}
5124
5125static irqreturn_t iwl_isr(int irq, void *data)
5126{
5127 struct iwl_priv *priv = data;
5128 u32 inta, inta_mask;
5129 u32 inta_fh;
5130 if (!priv)
5131 return IRQ_NONE;
5132
5133 spin_lock(&priv->lock);
5134
5135 /* Disable (but don't clear!) interrupts here to avoid
5136 * back-to-back ISRs and sporadic interrupts from our NIC.
5137 * If we have something to service, the tasklet will re-enable ints.
5138 * If we *don't* have something, we'll re-enable before leaving here. */
5139 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5140 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5141
5142 /* Discover which interrupts are active/pending */
5143 inta = iwl_read32(priv, CSR_INT);
5144 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5145
5146 /* Ignore interrupt if there's nothing in NIC to service.
5147 * This may be due to IRQ shared with another device,
5148 * or due to sporadic interrupts thrown from our NIC. */
5149 if (!inta && !inta_fh) {
5150 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5151 goto none;
5152 }
5153
5154 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5155 /* Hardware disappeared */
5156 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5157 goto none;
5158 }
5159
5160 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5161 inta, inta_mask, inta_fh);
5162
5163 /* iwl_irq_tasklet() will service interrupts and re-enable them */
5164 tasklet_schedule(&priv->irq_tasklet);
5165 spin_unlock(&priv->lock);
5166
5167 return IRQ_HANDLED;
5168
5169 none:
5170 /* re-enable interrupts here since we don't have anything to service. */
5171 iwl_enable_interrupts(priv);
5172 spin_unlock(&priv->lock);
5173 return IRQ_NONE;
5174}
5175
5176/************************** EEPROM BANDS ****************************
5177 *
5178 * The iwl_eeprom_band definitions below provide the mapping from the
5179 * EEPROM contents to the specific channel number supported for each
5180 * band.
5181 *
5182 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5183 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5184 * The specific geography and calibration information for that channel
5185 * is contained in the eeprom map itself.
5186 *
5187 * During init, we copy the eeprom information and channel map
5188 * information into priv->channel_info_24/52 and priv->channel_map_24/52
5189 *
5190 * channel_map_24/52 provides the index in the channel_info array for a
5191 * given channel. We have to have two separate maps as there is channel
5192 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5193 * band_2
5194 *
5195 * A value of 0xff stored in the channel_map indicates that the channel
5196 * is not supported by the hardware at all.
5197 *
5198 * A value of 0xfe in the channel_map indicates that the channel is not
5199 * valid for Tx with the current hardware. This means that
5200 * while the system can tune and receive on a given channel, it may not
5201 * be able to associate or transmit any frames on that
5202 * channel. There is no corresponding channel information for that
5203 * entry.
5204 *
5205 *********************************************************************/
5206
5207/* 2.4 GHz */
5208static const u8 iwl_eeprom_band_1[14] = {
5209 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5210};
5211
5212/* 5.2 GHz bands */
5213static const u8 iwl_eeprom_band_2[] = {
5214 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5215};
5216
5217static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5218 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5219};
5220
5221static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5222 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5223};
5224
5225static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5226 145, 149, 153, 157, 161, 165
5227};
5228
5229static u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
5230 1, 2, 3, 4, 5, 6, 7
5231};
5232
5233static u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
5234 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5235};
5236
5237static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5238 int *eeprom_ch_count,
5239 const struct iwl_eeprom_channel
5240 **eeprom_ch_info,
5241 const u8 **eeprom_ch_index)
5242{
5243 switch (band) {
5244 case 1: /* 2.4GHz band */
5245 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5246 *eeprom_ch_info = priv->eeprom.band_1_channels;
5247 *eeprom_ch_index = iwl_eeprom_band_1;
5248 break;
5249 case 2: /* 5.2GHz band */
5250 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5251 *eeprom_ch_info = priv->eeprom.band_2_channels;
5252 *eeprom_ch_index = iwl_eeprom_band_2;
5253 break;
5254 case 3: /* 5.2GHz band */
5255 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5256 *eeprom_ch_info = priv->eeprom.band_3_channels;
5257 *eeprom_ch_index = iwl_eeprom_band_3;
5258 break;
5259 case 4: /* 5.2GHz band */
5260 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5261 *eeprom_ch_info = priv->eeprom.band_4_channels;
5262 *eeprom_ch_index = iwl_eeprom_band_4;
5263 break;
5264 case 5: /* 5.2GHz band */
5265 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5266 *eeprom_ch_info = priv->eeprom.band_5_channels;
5267 *eeprom_ch_index = iwl_eeprom_band_5;
5268 break;
5269 case 6:
5270 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5271 *eeprom_ch_info = priv->eeprom.band_24_channels;
5272 *eeprom_ch_index = iwl_eeprom_band_6;
5273 break;
5274 case 7:
5275 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5276 *eeprom_ch_info = priv->eeprom.band_52_channels;
5277 *eeprom_ch_index = iwl_eeprom_band_7;
5278 break;
5279 default:
5280 BUG();
5281 return;
5282 }
5283}
5284
5285const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5286 int phymode, u16 channel)
5287{
5288 int i;
5289
5290 switch (phymode) {
5291 case MODE_IEEE80211A:
5292 for (i = 14; i < priv->channel_count; i++) {
5293 if (priv->channel_info[i].channel == channel)
5294 return &priv->channel_info[i];
5295 }
5296 break;
5297
5298 case MODE_IEEE80211B:
5299 case MODE_IEEE80211G:
5300 if (channel >= 1 && channel <= 14)
5301 return &priv->channel_info[channel - 1];
5302 break;
5303
5304 }
5305
5306 return NULL;
5307}
5308
5309#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5310 ? # x " " : "")
5311
5312static int iwl_init_channel_map(struct iwl_priv *priv)
5313{
5314 int eeprom_ch_count = 0;
5315 const u8 *eeprom_ch_index = NULL;
5316 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5317 int band, ch;
5318 struct iwl_channel_info *ch_info;
5319
5320 if (priv->channel_count) {
5321 IWL_DEBUG_INFO("Channel map already initialized.\n");
5322 return 0;
5323 }
5324
5325 if (priv->eeprom.version < 0x2f) {
5326 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5327 priv->eeprom.version);
5328 return -EINVAL;
5329 }
5330
5331 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5332
5333 priv->channel_count =
5334 ARRAY_SIZE(iwl_eeprom_band_1) +
5335 ARRAY_SIZE(iwl_eeprom_band_2) +
5336 ARRAY_SIZE(iwl_eeprom_band_3) +
5337 ARRAY_SIZE(iwl_eeprom_band_4) +
5338 ARRAY_SIZE(iwl_eeprom_band_5);
5339
5340 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5341
5342 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5343 priv->channel_count, GFP_KERNEL);
5344 if (!priv->channel_info) {
5345 IWL_ERROR("Could not allocate channel_info\n");
5346 priv->channel_count = 0;
5347 return -ENOMEM;
5348 }
5349
5350 ch_info = priv->channel_info;
5351
5352 /* Loop through the 5 EEPROM bands adding them in order to the
5353 * channel map we maintain (that contains additional information than
5354 * what just in the EEPROM) */
5355 for (band = 1; band <= 5; band++) {
5356
5357 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5358 &eeprom_ch_info, &eeprom_ch_index);
5359
5360 /* Loop through each band adding each of the channels */
5361 for (ch = 0; ch < eeprom_ch_count; ch++) {
5362 ch_info->channel = eeprom_ch_index[ch];
5363 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5364 MODE_IEEE80211A;
5365
5366 /* permanently store EEPROM's channel regulatory flags
5367 * and max power in channel info database. */
5368 ch_info->eeprom = eeprom_ch_info[ch];
5369
5370 /* Copy the run-time flags so they are there even on
5371 * invalid channels */
5372 ch_info->flags = eeprom_ch_info[ch].flags;
5373
5374 if (!(is_channel_valid(ch_info))) {
5375 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5376 "No traffic\n",
5377 ch_info->channel,
5378 ch_info->flags,
5379 is_channel_a_band(ch_info) ?
5380 "5.2" : "2.4");
5381 ch_info++;
5382 continue;
5383 }
5384
5385 /* Initialize regulatory-based run-time data */
5386 ch_info->max_power_avg = ch_info->curr_txpow =
5387 eeprom_ch_info[ch].max_power_avg;
5388 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5389 ch_info->min_power = 0;
5390
5391 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5392 " %ddBm): Ad-Hoc %ssupported\n",
5393 ch_info->channel,
5394 is_channel_a_band(ch_info) ?
5395 "5.2" : "2.4",
5396 CHECK_AND_PRINT(IBSS),
5397 CHECK_AND_PRINT(ACTIVE),
5398 CHECK_AND_PRINT(RADAR),
5399 CHECK_AND_PRINT(WIDE),
5400 CHECK_AND_PRINT(NARROW),
5401 CHECK_AND_PRINT(DFS),
5402 eeprom_ch_info[ch].flags,
5403 eeprom_ch_info[ch].max_power_avg,
5404 ((eeprom_ch_info[ch].
5405 flags & EEPROM_CHANNEL_IBSS)
5406 && !(eeprom_ch_info[ch].
5407 flags & EEPROM_CHANNEL_RADAR))
5408 ? "" : "not ");
5409
5410 /* Set the user_txpower_limit to the highest power
5411 * supported by any channel */
5412 if (eeprom_ch_info[ch].max_power_avg >
5413 priv->user_txpower_limit)
5414 priv->user_txpower_limit =
5415 eeprom_ch_info[ch].max_power_avg;
5416
5417 ch_info++;
5418 }
5419 }
5420
5421 for (band = 6; band <= 7; band++) {
5422 int phymode;
5423 u8 fat_extension_chan;
5424
5425 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5426 &eeprom_ch_info, &eeprom_ch_index);
5427
5428 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5429 /* Loop through each band adding each of the channels */
5430 for (ch = 0; ch < eeprom_ch_count; ch++) {
5431
5432 if ((band == 6) &&
5433 ((eeprom_ch_index[ch] == 5) ||
5434 (eeprom_ch_index[ch] == 6) ||
5435 (eeprom_ch_index[ch] == 7)))
5436 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5437 else
5438 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5439
5440 iwl4965_set_fat_chan_info(priv, phymode,
5441 eeprom_ch_index[ch],
5442 &(eeprom_ch_info[ch]),
5443 fat_extension_chan);
5444
5445 iwl4965_set_fat_chan_info(priv, phymode,
5446 (eeprom_ch_index[ch] + 4),
5447 &(eeprom_ch_info[ch]),
5448 HT_IE_EXT_CHANNEL_BELOW);
5449 }
5450 }
5451
5452 return 0;
5453}
5454
5455/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5456 * sending probe req. This should be set long enough to hear probe responses
5457 * from more than one AP. */
5458#define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5459#define IWL_ACTIVE_DWELL_TIME_52 (10)
5460
5461/* For faster active scanning, scan will move to the next channel if fewer than
5462 * PLCP_QUIET_THRESH packets are heard on this channel within
5463 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5464 * time if it's a quiet channel (nothing responded to our probe, and there's
5465 * no other traffic).
5466 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5467#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5468#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5469
5470/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5471 * Must be set longer than active dwell time.
5472 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5473#define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5474#define IWL_PASSIVE_DWELL_TIME_52 (10)
5475#define IWL_PASSIVE_DWELL_BASE (100)
5476#define IWL_CHANNEL_TUNE_TIME 5
5477
5478static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5479{
5480 if (phymode == MODE_IEEE80211A)
5481 return IWL_ACTIVE_DWELL_TIME_52;
5482 else
5483 return IWL_ACTIVE_DWELL_TIME_24;
5484}
5485
5486static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5487{
5488 u16 active = iwl_get_active_dwell_time(priv, phymode);
5489 u16 passive = (phymode != MODE_IEEE80211A) ?
5490 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5491 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5492
5493 if (iwl_is_associated(priv)) {
5494 /* If we're associated, we clamp the maximum passive
5495 * dwell time to be 98% of the beacon interval (minus
5496 * 2 * channel tune time) */
5497 passive = priv->beacon_int;
5498 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5499 passive = IWL_PASSIVE_DWELL_BASE;
5500 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5501 }
5502
5503 if (passive <= active)
5504 passive = active + 1;
5505
5506 return passive;
5507}
5508
5509static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5510 u8 is_active, u8 direct_mask,
5511 struct iwl_scan_channel *scan_ch)
5512{
5513 const struct ieee80211_channel *channels = NULL;
5514 const struct ieee80211_hw_mode *hw_mode;
5515 const struct iwl_channel_info *ch_info;
5516 u16 passive_dwell = 0;
5517 u16 active_dwell = 0;
5518 int added, i;
5519
5520 hw_mode = iwl_get_hw_mode(priv, phymode);
5521 if (!hw_mode)
5522 return 0;
5523
5524 channels = hw_mode->channels;
5525
5526 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5527 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5528
5529 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5530 if (channels[i].chan ==
5531 le16_to_cpu(priv->active_rxon.channel)) {
5532 if (iwl_is_associated(priv)) {
5533 IWL_DEBUG_SCAN
5534 ("Skipping current channel %d\n",
5535 le16_to_cpu(priv->active_rxon.channel));
5536 continue;
5537 }
5538 } else if (priv->only_active_channel)
5539 continue;
5540
5541 scan_ch->channel = channels[i].chan;
5542
5543 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5544 if (!is_channel_valid(ch_info)) {
5545 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5546 scan_ch->channel);
5547 continue;
5548 }
5549
5550 if (!is_active || is_channel_passive(ch_info) ||
5551 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5552 scan_ch->type = 0; /* passive */
5553 else
5554 scan_ch->type = 1; /* active */
5555
5556 if (scan_ch->type & 1)
5557 scan_ch->type |= (direct_mask << 1);
5558
5559 if (is_channel_narrow(ch_info))
5560 scan_ch->type |= (1 << 7);
5561
5562 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5563 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5564
5565 /* Set power levels to defaults */
5566 scan_ch->tpc.dsp_atten = 110;
5567 /* scan_pwr_info->tpc.dsp_atten; */
5568
5569 /*scan_pwr_info->tpc.tx_gain; */
5570 if (phymode == MODE_IEEE80211A)
5571 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5572 else {
5573 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5574 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5575 * power level
5576 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5577 */
5578 }
5579
5580 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5581 scan_ch->channel,
5582 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5583 (scan_ch->type & 1) ?
5584 active_dwell : passive_dwell);
5585
5586 scan_ch++;
5587 added++;
5588 }
5589
5590 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5591 return added;
5592}
5593
5594static void iwl_reset_channel_flag(struct iwl_priv *priv)
5595{
5596 int i, j;
5597 for (i = 0; i < 3; i++) {
5598 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5599 for (j = 0; j < hw_mode->num_channels; j++)
5600 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5601 }
5602}
5603
5604static void iwl_init_hw_rates(struct iwl_priv *priv,
5605 struct ieee80211_rate *rates)
5606{
5607 int i;
5608
5609 for (i = 0; i < IWL_RATE_COUNT; i++) {
5610 rates[i].rate = iwl_rates[i].ieee * 5;
5611 rates[i].val = i; /* Rate scaling will work on indexes */
5612 rates[i].val2 = i;
5613 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5614 /* Only OFDM have the bits-per-symbol set */
5615 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5616 rates[i].flags |= IEEE80211_RATE_OFDM;
5617 else {
5618 /*
5619 * If CCK 1M then set rate flag to CCK else CCK_2
5620 * which is CCK | PREAMBLE2
5621 */
5622 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5623 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5624 }
5625
5626 /* Set up which ones are basic rates... */
5627 if (IWL_BASIC_RATES_MASK & (1 << i))
5628 rates[i].flags |= IEEE80211_RATE_BASIC;
5629 }
5630
5631 iwl4965_init_hw_rates(priv, rates);
5632}
5633
5634/**
5635 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5636 */
5637static int iwl_init_geos(struct iwl_priv *priv)
5638{
5639 struct iwl_channel_info *ch;
5640 struct ieee80211_hw_mode *modes;
5641 struct ieee80211_channel *channels;
5642 struct ieee80211_channel *geo_ch;
5643 struct ieee80211_rate *rates;
5644 int i = 0;
5645 enum {
5646 A = 0,
5647 B = 1,
5648 G = 2,
5649 A_11N = 3,
5650 G_11N = 4,
5651 };
5652 int mode_count = 5;
5653
5654 if (priv->modes) {
5655 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5656 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5657 return 0;
5658 }
5659
5660 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5661 GFP_KERNEL);
5662 if (!modes)
5663 return -ENOMEM;
5664
5665 channels = kzalloc(sizeof(struct ieee80211_channel) *
5666 priv->channel_count, GFP_KERNEL);
5667 if (!channels) {
5668 kfree(modes);
5669 return -ENOMEM;
5670 }
5671
5672 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5673 GFP_KERNEL);
5674 if (!rates) {
5675 kfree(modes);
5676 kfree(channels);
5677 return -ENOMEM;
5678 }
5679
5680 /* 0 = 802.11a
5681 * 1 = 802.11b
5682 * 2 = 802.11g
5683 */
5684
5685 /* 5.2GHz channels start after the 2.4GHz channels */
5686 modes[A].mode = MODE_IEEE80211A;
5687 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5688 modes[A].rates = rates;
5689 modes[A].num_rates = 8; /* just OFDM */
5690 modes[A].rates = &rates[4];
5691 modes[A].num_channels = 0;
5692
5693 modes[B].mode = MODE_IEEE80211B;
5694 modes[B].channels = channels;
5695 modes[B].rates = rates;
5696 modes[B].num_rates = 4; /* just CCK */
5697 modes[B].num_channels = 0;
5698
5699 modes[G].mode = MODE_IEEE80211G;
5700 modes[G].channels = channels;
5701 modes[G].rates = rates;
5702 modes[G].num_rates = 12; /* OFDM & CCK */
5703 modes[G].num_channels = 0;
5704
5705 modes[G_11N].mode = MODE_IEEE80211G;
5706 modes[G_11N].channels = channels;
5707 modes[G_11N].num_rates = 13; /* OFDM & CCK */
5708 modes[G_11N].rates = rates;
5709 modes[G_11N].num_channels = 0;
5710
5711 modes[A_11N].mode = MODE_IEEE80211A;
5712 modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5713 modes[A_11N].rates = &rates[4];
5714 modes[A_11N].num_rates = 9; /* just OFDM */
5715 modes[A_11N].num_channels = 0;
5716
5717 priv->ieee_channels = channels;
5718 priv->ieee_rates = rates;
5719
5720 iwl_init_hw_rates(priv, rates);
5721
5722 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5723 ch = &priv->channel_info[i];
5724
5725 if (!is_channel_valid(ch)) {
5726 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5727 "skipping.\n",
5728 ch->channel, is_channel_a_band(ch) ?
5729 "5.2" : "2.4");
5730 continue;
5731 }
5732
5733 if (is_channel_a_band(ch)) {
5734 geo_ch = &modes[A].channels[modes[A].num_channels++];
5735 modes[A_11N].num_channels++;
5736 } else {
5737 geo_ch = &modes[B].channels[modes[B].num_channels++];
5738 modes[G].num_channels++;
5739 modes[G_11N].num_channels++;
5740 }
5741
5742 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5743 geo_ch->chan = ch->channel;
5744 geo_ch->power_level = ch->max_power_avg;
5745 geo_ch->antenna_max = 0xff;
5746
5747 if (is_channel_valid(ch)) {
5748 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5749 if (ch->flags & EEPROM_CHANNEL_IBSS)
5750 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5751
5752 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5753 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5754
5755 if (ch->flags & EEPROM_CHANNEL_RADAR)
5756 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5757
5758 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5759 priv->max_channel_txpower_limit =
5760 ch->max_power_avg;
5761 }
5762
5763 geo_ch->val = geo_ch->flag;
5764 }
5765
5766 if ((modes[A].num_channels == 0) && priv->is_abg) {
5767 printk(KERN_INFO DRV_NAME
5768 ": Incorrectly detected BG card as ABG. Please send "
5769 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5770 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5771 priv->is_abg = 0;
5772 }
5773
5774 printk(KERN_INFO DRV_NAME
5775 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5776 modes[G].num_channels, modes[A].num_channels);
5777
5778 /*
5779 * NOTE: We register these in preference of order -- the
5780 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5781 * a phymode based on rates or AP capabilities but seems to
5782 * configure it purely on if the channel being configured
5783 * is supported by a mode -- and the first match is taken
5784 */
5785
5786 if (modes[G].num_channels)
5787 ieee80211_register_hwmode(priv->hw, &modes[G]);
5788 if (modes[B].num_channels)
5789 ieee80211_register_hwmode(priv->hw, &modes[B]);
5790 if (modes[A].num_channels)
5791 ieee80211_register_hwmode(priv->hw, &modes[A]);
5792
5793 priv->modes = modes;
5794 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5795
5796 return 0;
5797}
5798
5799/******************************************************************************
5800 *
5801 * uCode download functions
5802 *
5803 ******************************************************************************/
5804
5805static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5806{
5807 if (priv->ucode_code.v_addr != NULL) {
5808 pci_free_consistent(priv->pci_dev,
5809 priv->ucode_code.len,
5810 priv->ucode_code.v_addr,
5811 priv->ucode_code.p_addr);
5812 priv->ucode_code.v_addr = NULL;
5813 }
5814 if (priv->ucode_data.v_addr != NULL) {
5815 pci_free_consistent(priv->pci_dev,
5816 priv->ucode_data.len,
5817 priv->ucode_data.v_addr,
5818 priv->ucode_data.p_addr);
5819 priv->ucode_data.v_addr = NULL;
5820 }
5821 if (priv->ucode_data_backup.v_addr != NULL) {
5822 pci_free_consistent(priv->pci_dev,
5823 priv->ucode_data_backup.len,
5824 priv->ucode_data_backup.v_addr,
5825 priv->ucode_data_backup.p_addr);
5826 priv->ucode_data_backup.v_addr = NULL;
5827 }
5828 if (priv->ucode_init.v_addr != NULL) {
5829 pci_free_consistent(priv->pci_dev,
5830 priv->ucode_init.len,
5831 priv->ucode_init.v_addr,
5832 priv->ucode_init.p_addr);
5833 priv->ucode_init.v_addr = NULL;
5834 }
5835 if (priv->ucode_init_data.v_addr != NULL) {
5836 pci_free_consistent(priv->pci_dev,
5837 priv->ucode_init_data.len,
5838 priv->ucode_init_data.v_addr,
5839 priv->ucode_init_data.p_addr);
5840 priv->ucode_init_data.v_addr = NULL;
5841 }
5842 if (priv->ucode_boot.v_addr != NULL) {
5843 pci_free_consistent(priv->pci_dev,
5844 priv->ucode_boot.len,
5845 priv->ucode_boot.v_addr,
5846 priv->ucode_boot.p_addr);
5847 priv->ucode_boot.v_addr = NULL;
5848 }
5849}
5850
5851/**
5852 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5853 * looking at all data.
5854 */
5855static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5856{
5857 u32 val;
5858 u32 save_len = len;
5859 int rc = 0;
5860 u32 errcnt;
5861
5862 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5863
5864 rc = iwl_grab_restricted_access(priv);
5865 if (rc)
5866 return rc;
5867
5868 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5869
5870 errcnt = 0;
5871 for (; len > 0; len -= sizeof(u32), image++) {
5872 /* read data comes through single port, auto-incr addr */
5873 /* NOTE: Use the debugless read so we don't flood kernel log
5874 * if IWL_DL_IO is set */
5875 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5876 if (val != le32_to_cpu(*image)) {
5877 IWL_ERROR("uCode INST section is invalid at "
5878 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5879 save_len - len, val, le32_to_cpu(*image));
5880 rc = -EIO;
5881 errcnt++;
5882 if (errcnt >= 20)
5883 break;
5884 }
5885 }
5886
5887 iwl_release_restricted_access(priv);
5888
5889 if (!errcnt)
5890 IWL_DEBUG_INFO
5891 ("ucode image in INSTRUCTION memory is good\n");
5892
5893 return rc;
5894}
5895
5896
5897/**
5898 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5899 * using sample data 100 bytes apart. If these sample points are good,
5900 * it's a pretty good bet that everything between them is good, too.
5901 */
5902static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5903{
5904 u32 val;
5905 int rc = 0;
5906 u32 errcnt = 0;
5907 u32 i;
5908
5909 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5910
5911 rc = iwl_grab_restricted_access(priv);
5912 if (rc)
5913 return rc;
5914
5915 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5916 /* read data comes through single port, auto-incr addr */
5917 /* NOTE: Use the debugless read so we don't flood kernel log
5918 * if IWL_DL_IO is set */
5919 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5920 i + RTC_INST_LOWER_BOUND);
5921 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5922 if (val != le32_to_cpu(*image)) {
5923#if 0 /* Enable this if you want to see details */
5924 IWL_ERROR("uCode INST section is invalid at "
5925 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5926 i, val, *image);
5927#endif
5928 rc = -EIO;
5929 errcnt++;
5930 if (errcnt >= 3)
5931 break;
5932 }
5933 }
5934
5935 iwl_release_restricted_access(priv);
5936
5937 return rc;
5938}
5939
5940
5941/**
5942 * iwl_verify_ucode - determine which instruction image is in SRAM,
5943 * and verify its contents
5944 */
5945static int iwl_verify_ucode(struct iwl_priv *priv)
5946{
5947 __le32 *image;
5948 u32 len;
5949 int rc = 0;
5950
5951 /* Try bootstrap */
5952 image = (__le32 *)priv->ucode_boot.v_addr;
5953 len = priv->ucode_boot.len;
5954 rc = iwl_verify_inst_sparse(priv, image, len);
5955 if (rc == 0) {
5956 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5957 return 0;
5958 }
5959
5960 /* Try initialize */
5961 image = (__le32 *)priv->ucode_init.v_addr;
5962 len = priv->ucode_init.len;
5963 rc = iwl_verify_inst_sparse(priv, image, len);
5964 if (rc == 0) {
5965 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5966 return 0;
5967 }
5968
5969 /* Try runtime/protocol */
5970 image = (__le32 *)priv->ucode_code.v_addr;
5971 len = priv->ucode_code.len;
5972 rc = iwl_verify_inst_sparse(priv, image, len);
5973 if (rc == 0) {
5974 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5975 return 0;
5976 }
5977
5978 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5979
5980 /* Show first several data entries in instruction SRAM.
5981 * Selection of bootstrap image is arbitrary. */
5982 image = (__le32 *)priv->ucode_boot.v_addr;
5983 len = priv->ucode_boot.len;
5984 rc = iwl_verify_inst_full(priv, image, len);
5985
5986 return rc;
5987}
5988
5989
5990/* check contents of special bootstrap uCode SRAM */
5991static int iwl_verify_bsm(struct iwl_priv *priv)
5992{
5993 __le32 *image = priv->ucode_boot.v_addr;
5994 u32 len = priv->ucode_boot.len;
5995 u32 reg;
5996 u32 val;
5997
5998 IWL_DEBUG_INFO("Begin verify bsm\n");
5999
6000 /* verify BSM SRAM contents */
6001 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6002 for (reg = BSM_SRAM_LOWER_BOUND;
6003 reg < BSM_SRAM_LOWER_BOUND + len;
6004 reg += sizeof(u32), image ++) {
6005 val = iwl_read_restricted_reg(priv, reg);
6006 if (val != le32_to_cpu(*image)) {
6007 IWL_ERROR("BSM uCode verification failed at "
6008 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6009 BSM_SRAM_LOWER_BOUND,
6010 reg - BSM_SRAM_LOWER_BOUND, len,
6011 val, le32_to_cpu(*image));
6012 return -EIO;
6013 }
6014 }
6015
6016 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6017
6018 return 0;
6019}
6020
6021/**
6022 * iwl_load_bsm - Load bootstrap instructions
6023 *
6024 * BSM operation:
6025 *
6026 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6027 * in special SRAM that does not power down during RFKILL. When powering back
6028 * up after power-saving sleeps (or during initial uCode load), the BSM loads
6029 * the bootstrap program into the on-board processor, and starts it.
6030 *
6031 * The bootstrap program loads (via DMA) instructions and data for a new
6032 * program from host DRAM locations indicated by the host driver in the
6033 * BSM_DRAM_* registers. Once the new program is loaded, it starts
6034 * automatically.
6035 *
6036 * When initializing the NIC, the host driver points the BSM to the
6037 * "initialize" uCode image. This uCode sets up some internal data, then
6038 * notifies host via "initialize alive" that it is complete.
6039 *
6040 * The host then replaces the BSM_DRAM_* pointer values to point to the
6041 * normal runtime uCode instructions and a backup uCode data cache buffer
6042 * (filled initially with starting data values for the on-board processor),
6043 * then triggers the "initialize" uCode to load and launch the runtime uCode,
6044 * which begins normal operation.
6045 *
6046 * When doing a power-save shutdown, runtime uCode saves data SRAM into
6047 * the backup data cache in DRAM before SRAM is powered down.
6048 *
6049 * When powering back up, the BSM loads the bootstrap program. This reloads
6050 * the runtime uCode instructions and the backup data cache into SRAM,
6051 * and re-launches the runtime uCode from where it left off.
6052 */
6053static int iwl_load_bsm(struct iwl_priv *priv)
6054{
6055 __le32 *image = priv->ucode_boot.v_addr;
6056 u32 len = priv->ucode_boot.len;
6057 dma_addr_t pinst;
6058 dma_addr_t pdata;
6059 u32 inst_len;
6060 u32 data_len;
6061 int rc;
6062 int i;
6063 u32 done;
6064 u32 reg_offset;
6065
6066 IWL_DEBUG_INFO("Begin load bsm\n");
6067
6068 /* make sure bootstrap program is no larger than BSM's SRAM size */
6069 if (len > IWL_MAX_BSM_SIZE)
6070 return -EINVAL;
6071
6072 /* Tell bootstrap uCode where to find the "Initialize" uCode
6073 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6074 * NOTE: iwl_initialize_alive_start() will replace these values,
6075 * after the "initialize" uCode has run, to point to
6076 * runtime/protocol instructions and backup data cache. */
6077 pinst = priv->ucode_init.p_addr >> 4;
6078 pdata = priv->ucode_init_data.p_addr >> 4;
6079 inst_len = priv->ucode_init.len;
6080 data_len = priv->ucode_init_data.len;
6081
6082 rc = iwl_grab_restricted_access(priv);
6083 if (rc)
6084 return rc;
6085
6086 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6087 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6088 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6089 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6090
6091 /* Fill BSM memory with bootstrap instructions */
6092 for (reg_offset = BSM_SRAM_LOWER_BOUND;
6093 reg_offset < BSM_SRAM_LOWER_BOUND + len;
6094 reg_offset += sizeof(u32), image++)
6095 _iwl_write_restricted_reg(priv, reg_offset,
6096 le32_to_cpu(*image));
6097
6098 rc = iwl_verify_bsm(priv);
6099 if (rc) {
6100 iwl_release_restricted_access(priv);
6101 return rc;
6102 }
6103
6104 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6105 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6106 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6107 RTC_INST_LOWER_BOUND);
6108 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6109
6110 /* Load bootstrap code into instruction SRAM now,
6111 * to prepare to load "initialize" uCode */
6112 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6113 BSM_WR_CTRL_REG_BIT_START);
6114
6115 /* Wait for load of bootstrap uCode to finish */
6116 for (i = 0; i < 100; i++) {
6117 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6118 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6119 break;
6120 udelay(10);
6121 }
6122 if (i < 100)
6123 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6124 else {
6125 IWL_ERROR("BSM write did not complete!\n");
6126 return -EIO;
6127 }
6128
6129 /* Enable future boot loads whenever power management unit triggers it
6130 * (e.g. when powering back up after power-save shutdown) */
6131 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6132 BSM_WR_CTRL_REG_BIT_START_EN);
6133
6134 iwl_release_restricted_access(priv);
6135
6136 return 0;
6137}
6138
6139static void iwl_nic_start(struct iwl_priv *priv)
6140{
6141 /* Remove all resets to allow NIC to operate */
6142 iwl_write32(priv, CSR_RESET, 0);
6143}
6144
6145/**
6146 * iwl_read_ucode - Read uCode images from disk file.
6147 *
6148 * Copy into buffers for card to fetch via bus-mastering
6149 */
6150static int iwl_read_ucode(struct iwl_priv *priv)
6151{
6152 struct iwl_ucode *ucode;
6153 int rc = 0;
6154 const struct firmware *ucode_raw;
6155 const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6156 u8 *src;
6157 size_t len;
6158 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6159
6160 /* Ask kernel firmware_class module to get the boot firmware off disk.
6161 * request_firmware() is synchronous, file is in memory on return. */
6162 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6163 if (rc < 0) {
6164 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6165 goto error;
6166 }
6167
6168 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6169 name, ucode_raw->size);
6170
6171 /* Make sure that we got at least our header! */
6172 if (ucode_raw->size < sizeof(*ucode)) {
6173 IWL_ERROR("File size way too small!\n");
6174 rc = -EINVAL;
6175 goto err_release;
6176 }
6177
6178 /* Data from ucode file: header followed by uCode images */
6179 ucode = (void *)ucode_raw->data;
6180
6181 ver = le32_to_cpu(ucode->ver);
6182 inst_size = le32_to_cpu(ucode->inst_size);
6183 data_size = le32_to_cpu(ucode->data_size);
6184 init_size = le32_to_cpu(ucode->init_size);
6185 init_data_size = le32_to_cpu(ucode->init_data_size);
6186 boot_size = le32_to_cpu(ucode->boot_size);
6187
6188 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6189 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6190 inst_size);
6191 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6192 data_size);
6193 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6194 init_size);
6195 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6196 init_data_size);
6197 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6198 boot_size);
6199
6200 /* Verify size of file vs. image size info in file's header */
6201 if (ucode_raw->size < sizeof(*ucode) +
6202 inst_size + data_size + init_size +
6203 init_data_size + boot_size) {
6204
6205 IWL_DEBUG_INFO("uCode file size %d too small\n",
6206 (int)ucode_raw->size);
6207 rc = -EINVAL;
6208 goto err_release;
6209 }
6210
6211 /* Verify that uCode images will fit in card's SRAM */
6212 if (inst_size > IWL_MAX_INST_SIZE) {
6213 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6214 (int)inst_size);
6215 rc = -EINVAL;
6216 goto err_release;
6217 }
6218
6219 if (data_size > IWL_MAX_DATA_SIZE) {
6220 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6221 (int)data_size);
6222 rc = -EINVAL;
6223 goto err_release;
6224 }
6225 if (init_size > IWL_MAX_INST_SIZE) {
6226 IWL_DEBUG_INFO
6227 ("uCode init instr len %d too large to fit in card\n",
6228 (int)init_size);
6229 rc = -EINVAL;
6230 goto err_release;
6231 }
6232 if (init_data_size > IWL_MAX_DATA_SIZE) {
6233 IWL_DEBUG_INFO
6234 ("uCode init data len %d too large to fit in card\n",
6235 (int)init_data_size);
6236 rc = -EINVAL;
6237 goto err_release;
6238 }
6239 if (boot_size > IWL_MAX_BSM_SIZE) {
6240 IWL_DEBUG_INFO
6241 ("uCode boot instr len %d too large to fit in bsm\n",
6242 (int)boot_size);
6243 rc = -EINVAL;
6244 goto err_release;
6245 }
6246
6247 /* Allocate ucode buffers for card's bus-master loading ... */
6248
6249 /* Runtime instructions and 2 copies of data:
6250 * 1) unmodified from disk
6251 * 2) backup cache for save/restore during power-downs */
6252 priv->ucode_code.len = inst_size;
6253 priv->ucode_code.v_addr =
6254 pci_alloc_consistent(priv->pci_dev,
6255 priv->ucode_code.len,
6256 &(priv->ucode_code.p_addr));
6257
6258 priv->ucode_data.len = data_size;
6259 priv->ucode_data.v_addr =
6260 pci_alloc_consistent(priv->pci_dev,
6261 priv->ucode_data.len,
6262 &(priv->ucode_data.p_addr));
6263
6264 priv->ucode_data_backup.len = data_size;
6265 priv->ucode_data_backup.v_addr =
6266 pci_alloc_consistent(priv->pci_dev,
6267 priv->ucode_data_backup.len,
6268 &(priv->ucode_data_backup.p_addr));
6269
6270
6271 /* Initialization instructions and data */
6272 priv->ucode_init.len = init_size;
6273 priv->ucode_init.v_addr =
6274 pci_alloc_consistent(priv->pci_dev,
6275 priv->ucode_init.len,
6276 &(priv->ucode_init.p_addr));
6277
6278 priv->ucode_init_data.len = init_data_size;
6279 priv->ucode_init_data.v_addr =
6280 pci_alloc_consistent(priv->pci_dev,
6281 priv->ucode_init_data.len,
6282 &(priv->ucode_init_data.p_addr));
6283
6284 /* Bootstrap (instructions only, no data) */
6285 priv->ucode_boot.len = boot_size;
6286 priv->ucode_boot.v_addr =
6287 pci_alloc_consistent(priv->pci_dev,
6288 priv->ucode_boot.len,
6289 &(priv->ucode_boot.p_addr));
6290
6291 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6292 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6293 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6294 goto err_pci_alloc;
6295
6296 /* Copy images into buffers for card's bus-master reads ... */
6297
6298 /* Runtime instructions (first block of data in file) */
6299 src = &ucode->data[0];
6300 len = priv->ucode_code.len;
6301 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6302 (int)len);
6303 memcpy(priv->ucode_code.v_addr, src, len);
6304 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6305 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6306
6307 /* Runtime data (2nd block)
6308 * NOTE: Copy into backup buffer will be done in iwl_up() */
6309 src = &ucode->data[inst_size];
6310 len = priv->ucode_data.len;
6311 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6312 (int)len);
6313 memcpy(priv->ucode_data.v_addr, src, len);
6314 memcpy(priv->ucode_data_backup.v_addr, src, len);
6315
6316 /* Initialization instructions (3rd block) */
6317 if (init_size) {
6318 src = &ucode->data[inst_size + data_size];
6319 len = priv->ucode_init.len;
6320 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6321 (int)len);
6322 memcpy(priv->ucode_init.v_addr, src, len);
6323 }
6324
6325 /* Initialization data (4th block) */
6326 if (init_data_size) {
6327 src = &ucode->data[inst_size + data_size + init_size];
6328 len = priv->ucode_init_data.len;
6329 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6330 (int)len);
6331 memcpy(priv->ucode_init_data.v_addr, src, len);
6332 }
6333
6334 /* Bootstrap instructions (5th block) */
6335 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6336 len = priv->ucode_boot.len;
6337 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6338 (int)len);
6339 memcpy(priv->ucode_boot.v_addr, src, len);
6340
6341 /* We have our copies now, allow OS release its copies */
6342 release_firmware(ucode_raw);
6343 return 0;
6344
6345 err_pci_alloc:
6346 IWL_ERROR("failed to allocate pci memory\n");
6347 rc = -ENOMEM;
6348 iwl_dealloc_ucode_pci(priv);
6349
6350 err_release:
6351 release_firmware(ucode_raw);
6352
6353 error:
6354 return rc;
6355}
6356
6357
6358/**
6359 * iwl_set_ucode_ptrs - Set uCode address location
6360 *
6361 * Tell initialization uCode where to find runtime uCode.
6362 *
6363 * BSM registers initially contain pointers to initialization uCode.
6364 * We need to replace them to load runtime uCode inst and data,
6365 * and to save runtime data when powering down.
6366 */
6367static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6368{
6369 dma_addr_t pinst;
6370 dma_addr_t pdata;
6371 int rc = 0;
6372 unsigned long flags;
6373
6374 /* bits 35:4 for 4965 */
6375 pinst = priv->ucode_code.p_addr >> 4;
6376 pdata = priv->ucode_data_backup.p_addr >> 4;
6377
6378 spin_lock_irqsave(&priv->lock, flags);
6379 rc = iwl_grab_restricted_access(priv);
6380 if (rc) {
6381 spin_unlock_irqrestore(&priv->lock, flags);
6382 return rc;
6383 }
6384
6385 /* Tell bootstrap uCode where to find image to load */
6386 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6387 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6388 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6389 priv->ucode_data.len);
6390
6391 /* Inst bytecount must be last to set up, bit 31 signals uCode
6392 * that all new ptr/size info is in place */
6393 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6394 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6395
6396 iwl_release_restricted_access(priv);
6397
6398 spin_unlock_irqrestore(&priv->lock, flags);
6399
6400 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6401
6402 return rc;
6403}
6404
6405/**
6406 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6407 *
6408 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6409 *
6410 * The 4965 "initialize" ALIVE reply contains calibration data for:
6411 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6412 * (3945 does not contain this data).
6413 *
6414 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6415*/
6416static void iwl_init_alive_start(struct iwl_priv *priv)
6417{
6418 /* Check alive response for "valid" sign from uCode */
6419 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6420 /* We had an error bringing up the hardware, so take it
6421 * all the way back down so we can try again */
6422 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6423 goto restart;
6424 }
6425
6426 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6427 * This is a paranoid check, because we would not have gotten the
6428 * "initialize" alive if code weren't properly loaded. */
6429 if (iwl_verify_ucode(priv)) {
6430 /* Runtime instruction load was bad;
6431 * take it all the way back down so we can try again */
6432 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6433 goto restart;
6434 }
6435
6436 /* Calculate temperature */
6437 priv->temperature = iwl4965_get_temperature(priv);
6438
6439 /* Send pointers to protocol/runtime uCode image ... init code will
6440 * load and launch runtime uCode, which will send us another "Alive"
6441 * notification. */
6442 IWL_DEBUG_INFO("Initialization Alive received.\n");
6443 if (iwl_set_ucode_ptrs(priv)) {
6444 /* Runtime instruction load won't happen;
6445 * take it all the way back down so we can try again */
6446 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6447 goto restart;
6448 }
6449 return;
6450
6451 restart:
6452 queue_work(priv->workqueue, &priv->restart);
6453}
6454
6455
6456/**
6457 * iwl_alive_start - called after REPLY_ALIVE notification received
6458 * from protocol/runtime uCode (initialization uCode's
6459 * Alive gets handled by iwl_init_alive_start()).
6460 */
6461static void iwl_alive_start(struct iwl_priv *priv)
6462{
6463 int rc = 0;
6464
6465 IWL_DEBUG_INFO("Runtime Alive received.\n");
6466
6467 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6468 /* We had an error bringing up the hardware, so take it
6469 * all the way back down so we can try again */
6470 IWL_DEBUG_INFO("Alive failed.\n");
6471 goto restart;
6472 }
6473
6474 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6475 * This is a paranoid check, because we would not have gotten the
6476 * "runtime" alive if code weren't properly loaded. */
6477 if (iwl_verify_ucode(priv)) {
6478 /* Runtime instruction load was bad;
6479 * take it all the way back down so we can try again */
6480 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6481 goto restart;
6482 }
6483
6484 iwl_clear_stations_table(priv);
6485
6486 rc = iwl4965_alive_notify(priv);
6487 if (rc) {
6488 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6489 rc);
6490 goto restart;
6491 }
6492
6493 /* After the ALIVE response, we can process host commands */
6494 set_bit(STATUS_ALIVE, &priv->status);
6495
6496 /* Clear out the uCode error bit if it is set */
6497 clear_bit(STATUS_FW_ERROR, &priv->status);
6498
6499 rc = iwl_init_channel_map(priv);
6500 if (rc) {
6501 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6502 return;
6503 }
6504
6505 iwl_init_geos(priv);
6506
6507 if (iwl_is_rfkill(priv))
6508 return;
6509
6510 if (!priv->mac80211_registered) {
6511 /* Unlock so any user space entry points can call back into
6512 * the driver without a deadlock... */
6513 mutex_unlock(&priv->mutex);
6514 iwl_rate_control_register(priv->hw);
6515 rc = ieee80211_register_hw(priv->hw);
6516 priv->hw->conf.beacon_int = 100;
6517 mutex_lock(&priv->mutex);
6518
6519 if (rc) {
6520 IWL_ERROR("Failed to register network "
6521 "device (error %d)\n", rc);
6522 return;
6523 }
6524
6525 priv->mac80211_registered = 1;
6526
6527 iwl_reset_channel_flag(priv);
6528 } else
6529 ieee80211_start_queues(priv->hw);
6530
6531 priv->active_rate = priv->rates_mask;
6532 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6533
6534 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6535
6536 if (iwl_is_associated(priv)) {
6537 struct iwl_rxon_cmd *active_rxon =
6538 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6539
6540 memcpy(&priv->staging_rxon, &priv->active_rxon,
6541 sizeof(priv->staging_rxon));
6542 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6543 } else {
6544 /* Initialize our rx_config data */
6545 iwl_connection_init_rx_config(priv);
6546 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6547 }
6548
6549 /* Configure BT coexistence */
6550 iwl_send_bt_config(priv);
6551
6552 /* Configure the adapter for unassociated operation */
6553 iwl_commit_rxon(priv);
6554
6555 /* At this point, the NIC is initialized and operational */
6556 priv->notif_missed_beacons = 0;
6557 set_bit(STATUS_READY, &priv->status);
6558
6559 iwl4965_rf_kill_ct_config(priv);
6560 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6561
6562 if (priv->error_recovering)
6563 iwl_error_recovery(priv);
6564
6565 return;
6566
6567 restart:
6568 queue_work(priv->workqueue, &priv->restart);
6569}
6570
6571static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6572
6573static void __iwl_down(struct iwl_priv *priv)
6574{
6575 unsigned long flags;
6576 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6577 struct ieee80211_conf *conf = NULL;
6578
6579 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6580
6581 conf = ieee80211_get_hw_conf(priv->hw);
6582
6583 if (!exit_pending)
6584 set_bit(STATUS_EXIT_PENDING, &priv->status);
6585
6586 iwl_clear_stations_table(priv);
6587
6588 /* Unblock any waiting calls */
6589 wake_up_interruptible_all(&priv->wait_command_queue);
6590
6591 iwl_cancel_deferred_work(priv);
6592
6593 /* Wipe out the EXIT_PENDING status bit if we are not actually
6594 * exiting the module */
6595 if (!exit_pending)
6596 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6597
6598 /* stop and reset the on-board processor */
6599 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6600
6601 /* tell the device to stop sending interrupts */
6602 iwl_disable_interrupts(priv);
6603
6604 if (priv->mac80211_registered)
6605 ieee80211_stop_queues(priv->hw);
6606
6607 /* If we have not previously called iwl_init() then
6608 * clear all bits but the RF Kill and SUSPEND bits and return */
6609 if (!iwl_is_init(priv)) {
6610 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6611 STATUS_RF_KILL_HW |
6612 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6613 STATUS_RF_KILL_SW |
6614 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6615 STATUS_IN_SUSPEND;
6616 goto exit;
6617 }
6618
6619 /* ...otherwise clear out all the status bits but the RF Kill and
6620 * SUSPEND bits and continue taking the NIC down. */
6621 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6622 STATUS_RF_KILL_HW |
6623 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6624 STATUS_RF_KILL_SW |
6625 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6626 STATUS_IN_SUSPEND |
6627 test_bit(STATUS_FW_ERROR, &priv->status) <<
6628 STATUS_FW_ERROR;
6629
6630 spin_lock_irqsave(&priv->lock, flags);
6631 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6632 spin_unlock_irqrestore(&priv->lock, flags);
6633
6634 iwl_hw_txq_ctx_stop(priv);
6635 iwl_hw_rxq_stop(priv);
6636
6637 spin_lock_irqsave(&priv->lock, flags);
6638 if (!iwl_grab_restricted_access(priv)) {
6639 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6640 APMG_CLK_VAL_DMA_CLK_RQT);
6641 iwl_release_restricted_access(priv);
6642 }
6643 spin_unlock_irqrestore(&priv->lock, flags);
6644
6645 udelay(5);
6646
6647 iwl_hw_nic_stop_master(priv);
6648 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6649 iwl_hw_nic_reset(priv);
6650
6651 exit:
6652 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6653
6654 if (priv->ibss_beacon)
6655 dev_kfree_skb(priv->ibss_beacon);
6656 priv->ibss_beacon = NULL;
6657
6658 /* clear out any free frames */
6659 iwl_clear_free_frames(priv);
6660}
6661
6662static void iwl_down(struct iwl_priv *priv)
6663{
6664 mutex_lock(&priv->mutex);
6665 __iwl_down(priv);
6666 mutex_unlock(&priv->mutex);
6667}
6668
6669#define MAX_HW_RESTARTS 5
6670
6671static int __iwl_up(struct iwl_priv *priv)
6672{
6673 int rc, i;
6674 u32 hw_rf_kill = 0;
6675
6676 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6677 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6678 return -EIO;
6679 }
6680
6681 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6682 IWL_WARNING("Radio disabled by SW RF kill (module "
6683 "parameter)\n");
6684 return 0;
6685 }
6686
6687 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6688
6689 rc = iwl_hw_nic_init(priv);
6690 if (rc) {
6691 IWL_ERROR("Unable to int nic\n");
6692 return rc;
6693 }
6694
6695 /* make sure rfkill handshake bits are cleared */
6696 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6697 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6698 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6699
6700 /* clear (again), then enable host interrupts */
6701 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6702 iwl_enable_interrupts(priv);
6703
6704 /* really make sure rfkill handshake bits are cleared */
6705 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6706 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6707
6708 /* Copy original ucode data image from disk into backup cache.
6709 * This will be used to initialize the on-board processor's
6710 * data SRAM for a clean start when the runtime program first loads. */
6711 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6712 priv->ucode_data.len);
6713
6714 /* If platform's RF_KILL switch is set to KILL,
6715 * wait for BIT_INT_RF_KILL interrupt before loading uCode
6716 * and getting things started */
6717 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6718 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6719 hw_rf_kill = 1;
6720
6721 if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6722 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6723 return 0;
6724 }
6725
6726 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6727
6728 iwl_clear_stations_table(priv);
6729
6730 /* load bootstrap state machine,
6731 * load bootstrap program into processor's memory,
6732 * prepare to load the "initialize" uCode */
6733 rc = iwl_load_bsm(priv);
6734
6735 if (rc) {
6736 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6737 continue;
6738 }
6739
6740 /* start card; "initialize" will load runtime ucode */
6741 iwl_nic_start(priv);
6742
6743 /* MAC Address location in EEPROM same for 3945/4965 */
6744 get_eeprom_mac(priv, priv->mac_addr);
6745 IWL_DEBUG_INFO("MAC address: " MAC_FMT "\n",
6746 MAC_ARG(priv->mac_addr));
6747
6748 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6749
6750 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6751
6752 return 0;
6753 }
6754
6755 set_bit(STATUS_EXIT_PENDING, &priv->status);
6756 __iwl_down(priv);
6757
6758 /* tried to restart and config the device for as long as our
6759 * patience could withstand */
6760 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6761 return -EIO;
6762}
6763
6764
6765/*****************************************************************************
6766 *
6767 * Workqueue callbacks
6768 *
6769 *****************************************************************************/
6770
6771static void iwl_bg_init_alive_start(struct work_struct *data)
6772{
6773 struct iwl_priv *priv =
6774 container_of(data, struct iwl_priv, init_alive_start.work);
6775
6776 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6777 return;
6778
6779 mutex_lock(&priv->mutex);
6780 iwl_init_alive_start(priv);
6781 mutex_unlock(&priv->mutex);
6782}
6783
6784static void iwl_bg_alive_start(struct work_struct *data)
6785{
6786 struct iwl_priv *priv =
6787 container_of(data, struct iwl_priv, alive_start.work);
6788
6789 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6790 return;
6791
6792 mutex_lock(&priv->mutex);
6793 iwl_alive_start(priv);
6794 mutex_unlock(&priv->mutex);
6795}
6796
6797static void iwl_bg_rf_kill(struct work_struct *work)
6798{
6799 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6800
6801 wake_up_interruptible(&priv->wait_command_queue);
6802
6803 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6804 return;
6805
6806 mutex_lock(&priv->mutex);
6807
6808 if (!iwl_is_rfkill(priv)) {
6809 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6810 "HW and/or SW RF Kill no longer active, restarting "
6811 "device\n");
6812 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6813 queue_work(priv->workqueue, &priv->restart);
6814 } else {
6815
6816 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6817 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6818 "disabled by SW switch\n");
6819 else
6820 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6821 "Kill switch must be turned off for "
6822 "wireless networking to work.\n");
6823 }
6824 mutex_unlock(&priv->mutex);
6825}
6826
6827#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6828
6829static void iwl_bg_scan_check(struct work_struct *data)
6830{
6831 struct iwl_priv *priv =
6832 container_of(data, struct iwl_priv, scan_check.work);
6833
6834 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6835 return;
6836
6837 mutex_lock(&priv->mutex);
6838 if (test_bit(STATUS_SCANNING, &priv->status) ||
6839 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6840 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6841 "Scan completion watchdog resetting adapter (%dms)\n",
6842 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6843 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6844 queue_work(priv->workqueue, &priv->restart);
6845 }
6846 mutex_unlock(&priv->mutex);
6847}
6848
6849static void iwl_bg_request_scan(struct work_struct *data)
6850{
6851 struct iwl_priv *priv =
6852 container_of(data, struct iwl_priv, request_scan);
6853 struct iwl_host_cmd cmd = {
6854 .id = REPLY_SCAN_CMD,
6855 .len = sizeof(struct iwl_scan_cmd),
6856 .meta.flags = CMD_SIZE_HUGE,
6857 };
6858 int rc = 0;
6859 struct iwl_scan_cmd *scan;
6860 struct ieee80211_conf *conf = NULL;
6861 u8 direct_mask;
6862 int phymode;
6863
6864 conf = ieee80211_get_hw_conf(priv->hw);
6865
6866 mutex_lock(&priv->mutex);
6867
6868 if (!iwl_is_ready(priv)) {
6869 IWL_WARNING("request scan called when driver not ready.\n");
6870 goto done;
6871 }
6872
6873 /* Make sure the scan wasn't cancelled before this queued work
6874 * was given the chance to run... */
6875 if (!test_bit(STATUS_SCANNING, &priv->status))
6876 goto done;
6877
6878 /* This should never be called or scheduled if there is currently
6879 * a scan active in the hardware. */
6880 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6881 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6882 "Ignoring second request.\n");
6883 rc = -EIO;
6884 goto done;
6885 }
6886
6887 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6888 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6889 goto done;
6890 }
6891
6892 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6893 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6894 goto done;
6895 }
6896
6897 if (iwl_is_rfkill(priv)) {
6898 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6899 goto done;
6900 }
6901
6902 if (!test_bit(STATUS_READY, &priv->status)) {
6903 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6904 goto done;
6905 }
6906
6907 if (!priv->scan_bands) {
6908 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6909 goto done;
6910 }
6911
6912 if (!priv->scan) {
6913 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6914 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6915 if (!priv->scan) {
6916 rc = -ENOMEM;
6917 goto done;
6918 }
6919 }
6920 scan = priv->scan;
6921 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6922
6923 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6924 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6925
6926 if (iwl_is_associated(priv)) {
6927 u16 interval = 0;
6928 u32 extra;
6929 u32 suspend_time = 100;
6930 u32 scan_suspend_time = 100;
6931 unsigned long flags;
6932
6933 IWL_DEBUG_INFO("Scanning while associated...\n");
6934
6935 spin_lock_irqsave(&priv->lock, flags);
6936 interval = priv->beacon_int;
6937 spin_unlock_irqrestore(&priv->lock, flags);
6938
6939 scan->suspend_time = 0;
6940 scan->max_out_time = cpu_to_le32(600 * 1024);
6941 if (!interval)
6942 interval = suspend_time;
6943
6944 extra = (suspend_time / interval) << 22;
6945 scan_suspend_time = (extra |
6946 ((suspend_time % interval) * 1024));
6947 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6948 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6949 scan_suspend_time, interval);
6950 }
6951
6952 /* We should add the ability for user to lock to PASSIVE ONLY */
6953 if (priv->one_direct_scan) {
6954 IWL_DEBUG_SCAN
6955 ("Kicking off one direct scan for '%s'\n",
6956 iwl_escape_essid(priv->direct_ssid,
6957 priv->direct_ssid_len));
6958 scan->direct_scan[0].id = WLAN_EID_SSID;
6959 scan->direct_scan[0].len = priv->direct_ssid_len;
6960 memcpy(scan->direct_scan[0].ssid,
6961 priv->direct_ssid, priv->direct_ssid_len);
6962 direct_mask = 1;
6963 } else if (!iwl_is_associated(priv)) {
6964 scan->direct_scan[0].id = WLAN_EID_SSID;
6965 scan->direct_scan[0].len = priv->essid_len;
6966 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6967 direct_mask = 1;
6968 } else
6969 direct_mask = 0;
6970
6971 /* We don't build a direct scan probe request; the uCode will do
6972 * that based on the direct_mask added to each channel entry */
6973 scan->tx_cmd.len = cpu_to_le16(
6974 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6975 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6976 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6977 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6978 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6979
6980 /* flags + rate selection */
6981
6982 scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
6983
6984 switch (priv->scan_bands) {
6985 case 2:
6986 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6987 scan->tx_cmd.rate_n_flags =
6988 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6989 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6990
6991 scan->good_CRC_th = 0;
6992 phymode = MODE_IEEE80211G;
6993 break;
6994
6995 case 1:
6996 scan->tx_cmd.rate_n_flags =
6997 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6998 RATE_MCS_ANT_B_MSK);
6999 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7000 phymode = MODE_IEEE80211A;
7001 break;
7002
7003 default:
7004 IWL_WARNING("Invalid scan band count\n");
7005 goto done;
7006 }
7007
7008 /* select Rx chains */
7009
7010 /* Force use of chains B and C (0x6) for scan Rx.
7011 * Avoid A (0x1) because of its off-channel reception on A-band.
7012 * MIMO is not used here, but value is required to make uCode happy. */
7013 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7014 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7015 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7016 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7017
7018 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7019 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7020
7021 if (direct_mask)
7022 IWL_DEBUG_SCAN
7023 ("Initiating direct scan for %s.\n",
7024 iwl_escape_essid(priv->essid, priv->essid_len));
7025 else
7026 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7027
7028 scan->channel_count =
7029 iwl_get_channels_for_scan(
7030 priv, phymode, 1, /* active */
7031 direct_mask,
7032 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7033
7034 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7035 scan->channel_count * sizeof(struct iwl_scan_channel);
7036 cmd.data = scan;
7037 scan->len = cpu_to_le16(cmd.len);
7038
7039 set_bit(STATUS_SCAN_HW, &priv->status);
7040 rc = iwl_send_cmd_sync(priv, &cmd);
7041 if (rc)
7042 goto done;
7043
7044 queue_delayed_work(priv->workqueue, &priv->scan_check,
7045 IWL_SCAN_CHECK_WATCHDOG);
7046
7047 mutex_unlock(&priv->mutex);
7048 return;
7049
7050 done:
7051 /* inform mac80211 sacn aborted */
7052 queue_work(priv->workqueue, &priv->scan_completed);
7053 mutex_unlock(&priv->mutex);
7054}
7055
7056static void iwl_bg_up(struct work_struct *data)
7057{
7058 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7059
7060 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7061 return;
7062
7063 mutex_lock(&priv->mutex);
7064 __iwl_up(priv);
7065 mutex_unlock(&priv->mutex);
7066}
7067
7068static void iwl_bg_restart(struct work_struct *data)
7069{
7070 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7071
7072 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7073 return;
7074
7075 iwl_down(priv);
7076 queue_work(priv->workqueue, &priv->up);
7077}
7078
7079static void iwl_bg_rx_replenish(struct work_struct *data)
7080{
7081 struct iwl_priv *priv =
7082 container_of(data, struct iwl_priv, rx_replenish);
7083
7084 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7085 return;
7086
7087 mutex_lock(&priv->mutex);
7088 iwl_rx_replenish(priv);
7089 mutex_unlock(&priv->mutex);
7090}
7091
7092static void iwl_bg_post_associate(struct work_struct *data)
7093{
7094 struct iwl_priv *priv = container_of(data, struct iwl_priv,
7095 post_associate.work);
7096
7097 int rc = 0;
7098 struct ieee80211_conf *conf = NULL;
7099
7100 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7101 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7102 return;
7103 }
7104
7105 IWL_DEBUG_ASSOC("Associated as %d to: " MAC_FMT "\n",
7106 priv->assoc_id, MAC_ARG(priv->active_rxon.bssid_addr));
7107
7108
7109 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7110 return;
7111
7112 mutex_lock(&priv->mutex);
7113
7114 conf = ieee80211_get_hw_conf(priv->hw);
7115
7116 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7117 iwl_commit_rxon(priv);
7118
7119 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7120 iwl_setup_rxon_timing(priv);
7121 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7122 sizeof(priv->rxon_timing), &priv->rxon_timing);
7123 if (rc)
7124 IWL_WARNING("REPLY_RXON_TIMING failed - "
7125 "Attempting to continue.\n");
7126
7127 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7128
7129#ifdef CONFIG_IWLWIFI_HT
7130 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7131 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7132 else {
7133 priv->active_rate_ht[0] = 0;
7134 priv->active_rate_ht[1] = 0;
7135 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7136 }
7137#endif /* CONFIG_IWLWIFI_HT*/
7138 iwl4965_set_rxon_chain(priv);
7139 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7140
7141 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7142 priv->assoc_id, priv->beacon_int);
7143
7144 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7145 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7146 else
7147 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7148
7149 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7150 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7151 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7152 else
7153 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7154
7155 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7156 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7157
7158 }
7159
7160 iwl_commit_rxon(priv);
7161
7162 switch (priv->iw_mode) {
7163 case IEEE80211_IF_TYPE_STA:
7164 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7165 break;
7166
7167 case IEEE80211_IF_TYPE_IBSS:
7168
7169 /* clear out the station table */
7170 iwl_clear_stations_table(priv);
7171
7172 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7173 iwl_rxon_add_station(priv, priv->bssid, 0);
7174 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7175 iwl_send_beacon_cmd(priv);
7176
7177 break;
7178
7179 default:
7180 IWL_ERROR("%s Should not be called in %d mode\n",
7181 __FUNCTION__, priv->iw_mode);
7182 break;
7183 }
7184
7185 iwl_sequence_reset(priv);
7186
7187#ifdef CONFIG_IWLWIFI_SENSITIVITY
7188 /* Enable Rx differential gain and sensitivity calibrations */
7189 iwl4965_chain_noise_reset(priv);
7190 priv->start_calib = 1;
7191#endif /* CONFIG_IWLWIFI_SENSITIVITY */
7192
7193 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7194 priv->assoc_station_added = 1;
7195
7196#ifdef CONFIG_IWLWIFI_QOS
7197 iwl_activate_qos(priv, 0);
7198#endif /* CONFIG_IWLWIFI_QOS */
7199 mutex_unlock(&priv->mutex);
7200}
7201
7202static void iwl_bg_abort_scan(struct work_struct *work)
7203{
7204 struct iwl_priv *priv = container_of(work, struct iwl_priv,
7205 abort_scan);
7206
7207 if (!iwl_is_ready(priv))
7208 return;
7209
7210 mutex_lock(&priv->mutex);
7211
7212 set_bit(STATUS_SCAN_ABORTING, &priv->status);
7213 iwl_send_scan_abort(priv);
7214
7215 mutex_unlock(&priv->mutex);
7216}
7217
7218static void iwl_bg_scan_completed(struct work_struct *work)
7219{
7220 struct iwl_priv *priv =
7221 container_of(work, struct iwl_priv, scan_completed);
7222
7223 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7224
7225 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7226 return;
7227
7228 ieee80211_scan_completed(priv->hw);
7229
7230 /* Since setting the TXPOWER may have been deferred while
7231 * performing the scan, fire one off */
7232 mutex_lock(&priv->mutex);
7233 iwl_hw_reg_send_txpower(priv);
7234 mutex_unlock(&priv->mutex);
7235}
7236
7237/*****************************************************************************
7238 *
7239 * mac80211 entry point functions
7240 *
7241 *****************************************************************************/
7242
7243static int iwl_mac_open(struct ieee80211_hw *hw)
7244{
7245 struct iwl_priv *priv = hw->priv;
7246
7247 IWL_DEBUG_MAC80211("enter\n");
7248
7249 /* we should be verifying the device is ready to be opened */
7250 mutex_lock(&priv->mutex);
7251
7252 priv->is_open = 1;
7253
7254 if (!iwl_is_rfkill(priv))
7255 ieee80211_start_queues(priv->hw);
7256
7257 mutex_unlock(&priv->mutex);
7258 IWL_DEBUG_MAC80211("leave\n");
7259 return 0;
7260}
7261
7262static int iwl_mac_stop(struct ieee80211_hw *hw)
7263{
7264 struct iwl_priv *priv = hw->priv;
7265
7266 IWL_DEBUG_MAC80211("enter\n");
7267 priv->is_open = 0;
7268 /*netif_stop_queue(dev); */
7269 flush_workqueue(priv->workqueue);
7270 IWL_DEBUG_MAC80211("leave\n");
7271
7272 return 0;
7273}
7274
7275static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7276 struct ieee80211_tx_control *ctl)
7277{
7278 struct iwl_priv *priv = hw->priv;
7279
7280 IWL_DEBUG_MAC80211("enter\n");
7281
7282 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7283 IWL_DEBUG_MAC80211("leave - monitor\n");
7284 return -1;
7285 }
7286
7287 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7288 ctl->tx_rate);
7289
7290 if (iwl_tx_skb(priv, skb, ctl))
7291 dev_kfree_skb_any(skb);
7292
7293 IWL_DEBUG_MAC80211("leave\n");
7294 return 0;
7295}
7296
7297static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7298 struct ieee80211_if_init_conf *conf)
7299{
7300 struct iwl_priv *priv = hw->priv;
7301 unsigned long flags;
7302
7303 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7304 if (conf->mac_addr)
7305 IWL_DEBUG_MAC80211("enter: MAC " MAC_FMT "\n",
7306 MAC_ARG(conf->mac_addr));
7307
7308 if (priv->interface_id) {
7309 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7310 return 0;
7311 }
7312
7313 spin_lock_irqsave(&priv->lock, flags);
7314 priv->interface_id = conf->if_id;
7315
7316 spin_unlock_irqrestore(&priv->lock, flags);
7317
7318 mutex_lock(&priv->mutex);
7319 iwl_set_mode(priv, conf->type);
7320
7321 IWL_DEBUG_MAC80211("leave\n");
7322 mutex_unlock(&priv->mutex);
7323
7324 return 0;
7325}
7326
7327/**
7328 * iwl_mac_config - mac80211 config callback
7329 *
7330 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7331 * be set inappropriately and the driver currently sets the hardware up to
7332 * use it whenever needed.
7333 */
7334static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7335{
7336 struct iwl_priv *priv = hw->priv;
7337 const struct iwl_channel_info *ch_info;
7338 unsigned long flags;
7339
7340 mutex_lock(&priv->mutex);
7341 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7342
7343 if (!iwl_is_ready(priv)) {
7344 IWL_DEBUG_MAC80211("leave - not ready\n");
7345 mutex_unlock(&priv->mutex);
7346 return -EIO;
7347 }
7348
7349 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7350 * what is exposed through include/ declrations */
7351 if (unlikely(!iwl_param_disable_hw_scan &&
7352 test_bit(STATUS_SCANNING, &priv->status))) {
7353 IWL_DEBUG_MAC80211("leave - scanning\n");
7354 mutex_unlock(&priv->mutex);
7355 return 0;
7356 }
7357
7358 spin_lock_irqsave(&priv->lock, flags);
7359
7360 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7361 if (!is_channel_valid(ch_info)) {
7362 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7363 conf->channel, conf->phymode);
7364 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7365 spin_unlock_irqrestore(&priv->lock, flags);
7366 mutex_unlock(&priv->mutex);
7367 return -EINVAL;
7368 }
7369
7370#ifdef CONFIG_IWLWIFI_HT
7371 /* if we are switching fron ht to 2.4 clear flags
7372 * from any ht related info since 2.4 does not
7373 * support ht */
7374 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7375#ifdef IEEE80211_CONF_CHANNEL_SWITCH
7376 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7377#endif
7378 )
7379 priv->staging_rxon.flags = 0;
7380#endif /* CONFIG_IWLWIFI_HT */
7381
7382 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7383
7384 iwl_set_flags_for_phymode(priv, conf->phymode);
7385
7386 /* The list of supported rates and rate mask can be different
7387 * for each phymode; since the phymode may have changed, reset
7388 * the rate mask to what mac80211 lists */
7389 iwl_set_rate(priv);
7390
7391 spin_unlock_irqrestore(&priv->lock, flags);
7392
7393#ifdef IEEE80211_CONF_CHANNEL_SWITCH
7394 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7395 iwl_hw_channel_switch(priv, conf->channel);
7396 mutex_unlock(&priv->mutex);
7397 return 0;
7398 }
7399#endif
7400
7401 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7402
7403 if (!conf->radio_enabled) {
7404 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7405 mutex_unlock(&priv->mutex);
7406 return 0;
7407 }
7408
7409 if (iwl_is_rfkill(priv)) {
7410 IWL_DEBUG_MAC80211("leave - RF kill\n");
7411 mutex_unlock(&priv->mutex);
7412 return -EIO;
7413 }
7414
7415 iwl_set_rate(priv);
7416
7417 if (memcmp(&priv->active_rxon,
7418 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7419 iwl_commit_rxon(priv);
7420 else
7421 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7422
7423 IWL_DEBUG_MAC80211("leave\n");
7424
7425 mutex_unlock(&priv->mutex);
7426
7427 return 0;
7428}
7429
7430static void iwl_config_ap(struct iwl_priv *priv)
7431{
7432 int rc = 0;
7433
7434 if (priv->status & STATUS_EXIT_PENDING)
7435 return;
7436
7437 /* The following should be done only at AP bring up */
7438 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7439
7440 /* RXON - unassoc (to set timing command) */
7441 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7442 iwl_commit_rxon(priv);
7443
7444 /* RXON Timing */
7445 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7446 iwl_setup_rxon_timing(priv);
7447 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7448 sizeof(priv->rxon_timing), &priv->rxon_timing);
7449 if (rc)
7450 IWL_WARNING("REPLY_RXON_TIMING failed - "
7451 "Attempting to continue.\n");
7452
7453 iwl4965_set_rxon_chain(priv);
7454
7455 /* FIXME: what should be the assoc_id for AP? */
7456 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7457 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7458 priv->staging_rxon.flags |=
7459 RXON_FLG_SHORT_PREAMBLE_MSK;
7460 else
7461 priv->staging_rxon.flags &=
7462 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7463
7464 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7465 if (priv->assoc_capability &
7466 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7467 priv->staging_rxon.flags |=
7468 RXON_FLG_SHORT_SLOT_MSK;
7469 else
7470 priv->staging_rxon.flags &=
7471 ~RXON_FLG_SHORT_SLOT_MSK;
7472
7473 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7474 priv->staging_rxon.flags &=
7475 ~RXON_FLG_SHORT_SLOT_MSK;
7476 }
7477 /* restore RXON assoc */
7478 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7479 iwl_commit_rxon(priv);
7480#ifdef CONFIG_IWLWIFI_QOS
7481 iwl_activate_qos(priv, 1);
7482#endif
7483 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7484 iwl_send_beacon_cmd(priv);
7485 } else
7486 iwl_send_beacon_cmd(priv);
7487
7488 /* FIXME - we need to add code here to detect a totally new
7489 * configuration, reset the AP, unassoc, rxon timing, assoc,
7490 * clear sta table, add BCAST sta... */
7491}
7492
7493static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7494 struct ieee80211_if_conf *conf)
7495{
7496 struct iwl_priv *priv = hw->priv;
7497 unsigned long flags;
7498 int rc;
7499
7500 if (conf == NULL)
7501 return -EIO;
7502
7503 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7504 (!conf->beacon || !conf->ssid_len)) {
7505 IWL_DEBUG_MAC80211
7506 ("Leaving in AP mode because HostAPD is not ready.\n");
7507 return 0;
7508 }
7509
7510 mutex_lock(&priv->mutex);
7511
7512 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7513 if (conf->bssid)
7514 IWL_DEBUG_MAC80211("bssid: " MAC_FMT "\n",
7515 MAC_ARG(conf->bssid));
7516
7517 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7518 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7519 IWL_DEBUG_MAC80211("leave - scanning\n");
7520 mutex_unlock(&priv->mutex);
7521 return 0;
7522 }
7523
7524 if (priv->interface_id != if_id) {
7525 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7526 mutex_unlock(&priv->mutex);
7527 return 0;
7528 }
7529
7530 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7531 if (!conf->bssid) {
7532 conf->bssid = priv->mac_addr;
7533 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7534 IWL_DEBUG_MAC80211("bssid was set to: " MAC_FMT "\n",
7535 MAC_ARG(conf->bssid));
7536 }
7537 if (priv->ibss_beacon)
7538 dev_kfree_skb(priv->ibss_beacon);
7539
7540 priv->ibss_beacon = conf->beacon;
7541 }
7542
7543 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7544 !is_multicast_ether_addr(conf->bssid)) {
7545 /* If there is currently a HW scan going on in the background
7546 * then we need to cancel it else the RXON below will fail. */
7547 if (iwl_scan_cancel_timeout(priv, 100)) {
7548 IWL_WARNING("Aborted scan still in progress "
7549 "after 100ms\n");
7550 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7551 mutex_unlock(&priv->mutex);
7552 return -EAGAIN;
7553 }
7554 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7555
7556 /* TODO: Audit driver for usage of these members and see
7557 * if mac80211 deprecates them (priv->bssid looks like it
7558 * shouldn't be there, but I haven't scanned the IBSS code
7559 * to verify) - jpk */
7560 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7561
7562 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7563 iwl_config_ap(priv);
7564 else {
7565 priv->staging_rxon.filter_flags |=
7566 RXON_FILTER_ASSOC_MSK;
7567 rc = iwl_commit_rxon(priv);
7568 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7569 iwl_rxon_add_station(
7570 priv, priv->active_rxon.bssid_addr, 1);
7571 }
7572
7573 } else {
7574 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7575 iwl_commit_rxon(priv);
7576 }
7577
7578 spin_lock_irqsave(&priv->lock, flags);
7579 if (!conf->ssid_len)
7580 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7581 else
7582 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7583
7584 priv->essid_len = conf->ssid_len;
7585 spin_unlock_irqrestore(&priv->lock, flags);
7586
7587 IWL_DEBUG_MAC80211("leave\n");
7588 mutex_unlock(&priv->mutex);
7589
7590 return 0;
7591}
7592
7593static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7594 struct ieee80211_if_init_conf *conf)
7595{
7596 struct iwl_priv *priv = hw->priv;
7597
7598 IWL_DEBUG_MAC80211("enter\n");
7599
7600 mutex_lock(&priv->mutex);
7601 if (priv->interface_id == conf->if_id) {
7602 priv->interface_id = 0;
7603 memset(priv->bssid, 0, ETH_ALEN);
7604 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7605 priv->essid_len = 0;
7606 }
7607 mutex_unlock(&priv->mutex);
7608
7609 IWL_DEBUG_MAC80211("leave\n");
7610
7611}
7612
7613#define IWL_DELAY_NEXT_SCAN (HZ*2)
7614static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7615{
7616 int rc = 0;
7617 unsigned long flags;
7618 struct iwl_priv *priv = hw->priv;
7619
7620 IWL_DEBUG_MAC80211("enter\n");
7621
7622 spin_lock_irqsave(&priv->lock, flags);
7623
7624 if (!iwl_is_ready_rf(priv)) {
7625 rc = -EIO;
7626 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7627 goto out_unlock;
7628 }
7629
7630 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7631 rc = -EIO;
7632 IWL_ERROR("ERROR: APs don't scan\n");
7633 goto out_unlock;
7634 }
7635
7636 /* if we just finished scan ask for delay */
7637 if (priv->last_scan_jiffies &&
7638 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7639 jiffies)) {
7640 rc = -EAGAIN;
7641 goto out_unlock;
7642 }
7643 if (len) {
7644 IWL_DEBUG_SCAN("direct scan for "
7645 "%s [%d]\n ",
7646 iwl_escape_essid(ssid, len), (int)len);
7647
7648 priv->one_direct_scan = 1;
7649 priv->direct_ssid_len = (u8)
7650 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7651 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7652 }
7653
7654 rc = iwl_scan_initiate(priv);
7655
7656 IWL_DEBUG_MAC80211("leave\n");
7657
7658out_unlock:
7659 spin_unlock_irqrestore(&priv->lock, flags);
7660
7661 return rc;
7662}
7663
7664static int iwl_mac_set_key(struct ieee80211_hw *hw, set_key_cmd cmd,
7665 const u8 *local_addr, const u8 *addr,
7666 struct ieee80211_key_conf *key)
7667{
7668 struct iwl_priv *priv = hw->priv;
7669 int rc = 0;
7670 u8 sta_id;
7671
7672 IWL_DEBUG_MAC80211("enter\n");
7673
7674 if (!iwl_param_hwcrypto) {
7675 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7676 return -EOPNOTSUPP;
7677 }
7678
7679 if (is_zero_ether_addr(addr))
7680 /* only support pairwise keys */
7681 return -EOPNOTSUPP;
7682
7683 sta_id = iwl_hw_find_station(priv, addr);
7684 if (sta_id == IWL_INVALID_STATION) {
7685 IWL_DEBUG_MAC80211("leave - " MAC_FMT " not in station map.\n",
7686 MAC_ARG(addr));
7687 return -EINVAL;
7688 }
7689
7690 mutex_lock(&priv->mutex);
7691
7692 switch (cmd) {
7693 case SET_KEY:
7694 rc = iwl_update_sta_key_info(priv, key, sta_id);
7695 if (!rc) {
7696 iwl_set_rxon_hwcrypto(priv, 1);
7697 iwl_commit_rxon(priv);
7698 key->hw_key_idx = sta_id;
7699 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7700 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7701 }
7702 break;
7703 case DISABLE_KEY:
7704 rc = iwl_clear_sta_key_info(priv, sta_id);
7705 if (!rc) {
7706 iwl_set_rxon_hwcrypto(priv, 0);
7707 iwl_commit_rxon(priv);
7708 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7709 }
7710 break;
7711 default:
7712 rc = -EINVAL;
7713 }
7714
7715 IWL_DEBUG_MAC80211("leave\n");
7716 mutex_unlock(&priv->mutex);
7717
7718 return rc;
7719}
7720
7721static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7722 const struct ieee80211_tx_queue_params *params)
7723{
7724 struct iwl_priv *priv = hw->priv;
7725#ifdef CONFIG_IWLWIFI_QOS
7726 unsigned long flags;
7727 int q;
7728#endif /* CONFIG_IWL_QOS */
7729
7730 IWL_DEBUG_MAC80211("enter\n");
7731
7732 if (!iwl_is_ready_rf(priv)) {
7733 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7734 return -EIO;
7735 }
7736
7737 if (queue >= AC_NUM) {
7738 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7739 return 0;
7740 }
7741
7742#ifdef CONFIG_IWLWIFI_QOS
7743 if (!priv->qos_data.qos_enable) {
7744 priv->qos_data.qos_active = 0;
7745 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7746 return 0;
7747 }
7748 q = AC_NUM - 1 - queue;
7749
7750 spin_lock_irqsave(&priv->lock, flags);
7751
7752 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7753 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7754 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7755 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7756 cpu_to_le16((params->burst_time * 100));
7757
7758 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7759 priv->qos_data.qos_active = 1;
7760
7761 spin_unlock_irqrestore(&priv->lock, flags);
7762
7763 mutex_lock(&priv->mutex);
7764 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7765 iwl_activate_qos(priv, 1);
7766 else if (priv->assoc_id && iwl_is_associated(priv))
7767 iwl_activate_qos(priv, 0);
7768
7769 mutex_unlock(&priv->mutex);
7770
7771#endif /*CONFIG_IWLWIFI_QOS */
7772
7773 IWL_DEBUG_MAC80211("leave\n");
7774 return 0;
7775}
7776
7777static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7778 struct ieee80211_tx_queue_stats *stats)
7779{
7780 struct iwl_priv *priv = hw->priv;
7781 int i, avail;
7782 struct iwl_tx_queue *txq;
7783 struct iwl_queue *q;
7784 unsigned long flags;
7785
7786 IWL_DEBUG_MAC80211("enter\n");
7787
7788 if (!iwl_is_ready_rf(priv)) {
7789 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7790 return -EIO;
7791 }
7792
7793 spin_lock_irqsave(&priv->lock, flags);
7794
7795 for (i = 0; i < AC_NUM; i++) {
7796 txq = &priv->txq[i];
7797 q = &txq->q;
7798 avail = iwl_queue_space(q);
7799
7800 stats->data[i].len = q->n_window - avail;
7801 stats->data[i].limit = q->n_window - q->high_mark;
7802 stats->data[i].count = q->n_window;
7803
7804 }
7805 spin_unlock_irqrestore(&priv->lock, flags);
7806
7807 IWL_DEBUG_MAC80211("leave\n");
7808
7809 return 0;
7810}
7811
7812static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7813 struct ieee80211_low_level_stats *stats)
7814{
7815 IWL_DEBUG_MAC80211("enter\n");
7816 IWL_DEBUG_MAC80211("leave\n");
7817
7818 return 0;
7819}
7820
7821static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7822{
7823 IWL_DEBUG_MAC80211("enter\n");
7824 IWL_DEBUG_MAC80211("leave\n");
7825
7826 return 0;
7827}
7828
7829static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7830{
7831 struct iwl_priv *priv = hw->priv;
7832 unsigned long flags;
7833
7834 mutex_lock(&priv->mutex);
7835 IWL_DEBUG_MAC80211("enter\n");
7836
7837 priv->lq_mngr.lq_ready = 0;
7838#ifdef CONFIG_IWLWIFI_HT
7839 spin_lock_irqsave(&priv->lock, flags);
7840 memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7841 spin_unlock_irqrestore(&priv->lock, flags);
7842#ifdef CONFIG_IWLWIFI_HT_AGG
7843/* if (priv->lq_mngr.agg_ctrl.granted_ba)
7844 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7845
7846 memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7847 priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7848 priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7849 priv->lq_mngr.agg_ctrl.auto_agg = 1;
7850
7851 if (priv->lq_mngr.agg_ctrl.auto_agg)
7852 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7853#endif /*CONFIG_IWLWIFI_HT_AGG */
7854#endif /* CONFIG_IWLWIFI_HT */
7855
7856#ifdef CONFIG_IWLWIFI_QOS
7857 iwl_reset_qos(priv);
7858#endif
7859
7860 cancel_delayed_work(&priv->post_associate);
7861
7862 spin_lock_irqsave(&priv->lock, flags);
7863 priv->assoc_id = 0;
7864 priv->assoc_capability = 0;
7865 priv->call_post_assoc_from_beacon = 0;
7866 priv->assoc_station_added = 0;
7867
7868 /* new association get rid of ibss beacon skb */
7869 if (priv->ibss_beacon)
7870 dev_kfree_skb(priv->ibss_beacon);
7871
7872 priv->ibss_beacon = NULL;
7873
7874 priv->beacon_int = priv->hw->conf.beacon_int;
7875 priv->timestamp1 = 0;
7876 priv->timestamp0 = 0;
7877 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7878 priv->beacon_int = 0;
7879
7880 spin_unlock_irqrestore(&priv->lock, flags);
7881
7882 /* Per mac80211.h: This is only used in IBSS mode... */
7883 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7884 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7885 mutex_unlock(&priv->mutex);
7886 return;
7887 }
7888
7889 if (!iwl_is_ready_rf(priv)) {
7890 IWL_DEBUG_MAC80211("leave - not ready\n");
7891 mutex_unlock(&priv->mutex);
7892 return;
7893 }
7894
7895 priv->only_active_channel = 0;
7896
7897 iwl_set_rate(priv);
7898
7899 mutex_unlock(&priv->mutex);
7900
7901 IWL_DEBUG_MAC80211("leave\n");
7902
7903}
7904
7905static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7906 struct ieee80211_tx_control *control)
7907{
7908 struct iwl_priv *priv = hw->priv;
7909 unsigned long flags;
7910
7911 mutex_lock(&priv->mutex);
7912 IWL_DEBUG_MAC80211("enter\n");
7913
7914 if (!iwl_is_ready_rf(priv)) {
7915 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7916 mutex_unlock(&priv->mutex);
7917 return -EIO;
7918 }
7919
7920 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7921 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7922 mutex_unlock(&priv->mutex);
7923 return -EIO;
7924 }
7925
7926 spin_lock_irqsave(&priv->lock, flags);
7927
7928 if (priv->ibss_beacon)
7929 dev_kfree_skb(priv->ibss_beacon);
7930
7931 priv->ibss_beacon = skb;
7932
7933 priv->assoc_id = 0;
7934
7935 IWL_DEBUG_MAC80211("leave\n");
7936 spin_unlock_irqrestore(&priv->lock, flags);
7937
7938#ifdef CONFIG_IWLWIFI_QOS
7939 iwl_reset_qos(priv);
7940#endif
7941
7942 queue_work(priv->workqueue, &priv->post_associate.work);
7943
7944 mutex_unlock(&priv->mutex);
7945
7946 return 0;
7947}
7948
7949#ifdef CONFIG_IWLWIFI_HT
7950union ht_cap_info {
7951 struct {
7952 u16 advanced_coding_cap :1;
7953 u16 supported_chan_width_set :1;
7954 u16 mimo_power_save_mode :2;
7955 u16 green_field :1;
7956 u16 short_GI20 :1;
7957 u16 short_GI40 :1;
7958 u16 tx_stbc :1;
7959 u16 rx_stbc :1;
7960 u16 beam_forming :1;
7961 u16 delayed_ba :1;
7962 u16 maximal_amsdu_size :1;
7963 u16 cck_mode_at_40MHz :1;
7964 u16 psmp_support :1;
7965 u16 stbc_ctrl_frame_support :1;
7966 u16 sig_txop_protection_support :1;
7967 };
7968 u16 val;
7969} __attribute__ ((packed));
7970
7971union ht_param_info{
7972 struct {
7973 u8 max_rx_ampdu_factor :2;
7974 u8 mpdu_density :3;
7975 u8 reserved :3;
7976 };
7977 u8 val;
7978} __attribute__ ((packed));
7979
7980union ht_exra_param_info {
7981 struct {
7982 u8 ext_chan_offset :2;
7983 u8 tx_chan_width :1;
7984 u8 rifs_mode :1;
7985 u8 controlled_access_only :1;
7986 u8 service_interval_granularity :3;
7987 };
7988 u8 val;
7989} __attribute__ ((packed));
7990
7991union ht_operation_mode{
7992 struct {
7993 u16 op_mode :2;
7994 u16 non_GF :1;
7995 u16 reserved :13;
7996 };
7997 u16 val;
7998} __attribute__ ((packed));
7999
8000
8001static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8002 struct ieee80211_ht_additional_info *ht_extra,
8003 struct sta_ht_info *ht_info_ap,
8004 struct sta_ht_info *ht_info)
8005{
8006 union ht_cap_info cap;
8007 union ht_operation_mode op_mode;
8008 union ht_param_info param_info;
8009 union ht_exra_param_info extra_param_info;
8010
8011 IWL_DEBUG_MAC80211("enter: \n");
8012
8013 if (!ht_info) {
8014 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8015 return -1;
8016 }
8017
8018 if (ht_cap) {
8019 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8020 param_info.val = ht_cap->mac_ht_params_info;
8021 ht_info->is_ht = 1;
8022 if (cap.short_GI20)
8023 ht_info->sgf |= 0x1;
8024 if (cap.short_GI40)
8025 ht_info->sgf |= 0x2;
8026 ht_info->is_green_field = cap.green_field;
8027 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8028 ht_info->supported_chan_width = cap.supported_chan_width_set;
8029 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8030 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8031
8032 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8033 ht_info->mpdu_density = param_info.mpdu_density;
8034
8035 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8036 ht_cap->supported_mcs_set[0],
8037 ht_cap->supported_mcs_set[1]);
8038
8039 if (ht_info_ap) {
8040 ht_info->control_channel = ht_info_ap->control_channel;
8041 ht_info->extension_chan_offset =
8042 ht_info_ap->extension_chan_offset;
8043 ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8044 ht_info->operating_mode = ht_info_ap->operating_mode;
8045 }
8046
8047 if (ht_extra) {
8048 extra_param_info.val = ht_extra->ht_param;
8049 ht_info->control_channel = ht_extra->control_chan;
8050 ht_info->extension_chan_offset =
8051 extra_param_info.ext_chan_offset;
8052 ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8053 op_mode.val = (u16)
8054 le16_to_cpu(ht_extra->operation_mode);
8055 ht_info->operating_mode = op_mode.op_mode;
8056 IWL_DEBUG_MAC80211("control channel %d\n",
8057 ht_extra->control_chan);
8058 }
8059 } else
8060 ht_info->is_ht = 0;
8061
8062 IWL_DEBUG_MAC80211("leave\n");
8063 return 0;
8064}
8065
8066static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8067 struct ieee80211_ht_capability *ht_cap,
8068 struct ieee80211_ht_additional_info *ht_extra)
8069{
8070 struct iwl_priv *priv = hw->priv;
8071 int rs;
8072
8073 IWL_DEBUG_MAC80211("enter: \n");
8074
8075 rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8076 iwl4965_set_rxon_chain(priv);
8077
8078 if (priv && priv->assoc_id &&
8079 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8080 unsigned long flags;
8081
8082 spin_lock_irqsave(&priv->lock, flags);
8083 if (priv->beacon_int)
8084 queue_work(priv->workqueue, &priv->post_associate.work);
8085 else
8086 priv->call_post_assoc_from_beacon = 1;
8087 spin_unlock_irqrestore(&priv->lock, flags);
8088 }
8089
8090 IWL_DEBUG_MAC80211("leave: control channel %d\n",
8091 ht_extra->control_chan);
8092 return rs;
8093
8094}
8095
8096static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8097 struct ieee80211_ht_capability *ht_cap,
8098 u8 use_wide_chan)
8099{
8100 union ht_cap_info cap;
8101 union ht_param_info param_info;
8102
8103 memset(&cap, 0, sizeof(union ht_cap_info));
8104 memset(&param_info, 0, sizeof(union ht_param_info));
8105
8106 cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8107 cap.green_field = 1;
8108 cap.short_GI20 = 1;
8109 cap.short_GI40 = 1;
8110 cap.supported_chan_width_set = use_wide_chan;
8111 cap.mimo_power_save_mode = 0x3;
8112
8113 param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8114 param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8115 ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8116 ht_cap->mac_ht_params_info = (u8) param_info.val;
8117
8118 ht_cap->supported_mcs_set[0] = 0xff;
8119 ht_cap->supported_mcs_set[1] = 0xff;
8120 ht_cap->supported_mcs_set[4] =
8121 (cap.supported_chan_width_set) ? 0x1: 0x0;
8122}
8123
8124static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8125 struct ieee80211_ht_capability *ht_cap)
8126{
8127 u8 use_wide_channel = 1;
8128 struct iwl_priv *priv = hw->priv;
8129
8130 IWL_DEBUG_MAC80211("enter: \n");
8131 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8132 use_wide_channel = 0;
8133
8134 /* no fat tx allowed on 2.4GHZ */
8135 if (priv->phymode != MODE_IEEE80211A)
8136 use_wide_channel = 0;
8137
8138 iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8139 IWL_DEBUG_MAC80211("leave: \n");
8140}
8141#endif /*CONFIG_IWLWIFI_HT*/
8142
8143/*****************************************************************************
8144 *
8145 * sysfs attributes
8146 *
8147 *****************************************************************************/
8148
8149#ifdef CONFIG_IWLWIFI_DEBUG
8150
8151/*
8152 * The following adds a new attribute to the sysfs representation
8153 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8154 * used for controlling the debug level.
8155 *
8156 * See the level definitions in iwl for details.
8157 */
8158
8159static ssize_t show_debug_level(struct device_driver *d, char *buf)
8160{
8161 return sprintf(buf, "0x%08X\n", iwl_debug_level);
8162}
8163static ssize_t store_debug_level(struct device_driver *d,
8164 const char *buf, size_t count)
8165{
8166 char *p = (char *)buf;
8167 u32 val;
8168
8169 val = simple_strtoul(p, &p, 0);
8170 if (p == buf)
8171 printk(KERN_INFO DRV_NAME
8172 ": %s is not in hex or decimal form.\n", buf);
8173 else
8174 iwl_debug_level = val;
8175
8176 return strnlen(buf, count);
8177}
8178
8179static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8180 show_debug_level, store_debug_level);
8181
8182#endif /* CONFIG_IWLWIFI_DEBUG */
8183
8184static ssize_t show_rf_kill(struct device *d,
8185 struct device_attribute *attr, char *buf)
8186{
8187 /*
8188 * 0 - RF kill not enabled
8189 * 1 - SW based RF kill active (sysfs)
8190 * 2 - HW based RF kill active
8191 * 3 - Both HW and SW based RF kill active
8192 */
8193 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8194 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8195 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8196
8197 return sprintf(buf, "%i\n", val);
8198}
8199
8200static ssize_t store_rf_kill(struct device *d,
8201 struct device_attribute *attr,
8202 const char *buf, size_t count)
8203{
8204 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8205
8206 mutex_lock(&priv->mutex);
8207 iwl_radio_kill_sw(priv, buf[0] == '1');
8208 mutex_unlock(&priv->mutex);
8209
8210 return count;
8211}
8212
8213static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8214
8215static ssize_t show_temperature(struct device *d,
8216 struct device_attribute *attr, char *buf)
8217{
8218 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8219
8220 if (!iwl_is_alive(priv))
8221 return -EAGAIN;
8222
8223 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8224}
8225
8226static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8227
8228static ssize_t show_rs_window(struct device *d,
8229 struct device_attribute *attr,
8230 char *buf)
8231{
8232 struct iwl_priv *priv = d->driver_data;
8233 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8234}
8235static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8236
8237static ssize_t show_tx_power(struct device *d,
8238 struct device_attribute *attr, char *buf)
8239{
8240 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8241 return sprintf(buf, "%d\n", priv->user_txpower_limit);
8242}
8243
8244static ssize_t store_tx_power(struct device *d,
8245 struct device_attribute *attr,
8246 const char *buf, size_t count)
8247{
8248 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8249 char *p = (char *)buf;
8250 u32 val;
8251
8252 val = simple_strtoul(p, &p, 10);
8253 if (p == buf)
8254 printk(KERN_INFO DRV_NAME
8255 ": %s is not in decimal form.\n", buf);
8256 else
8257 iwl_hw_reg_set_txpower(priv, val);
8258
8259 return count;
8260}
8261
8262static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8263
8264static ssize_t show_flags(struct device *d,
8265 struct device_attribute *attr, char *buf)
8266{
8267 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8268
8269 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8270}
8271
8272static ssize_t store_flags(struct device *d,
8273 struct device_attribute *attr,
8274 const char *buf, size_t count)
8275{
8276 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8277 u32 flags = simple_strtoul(buf, NULL, 0);
8278
8279 mutex_lock(&priv->mutex);
8280 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8281 /* Cancel any currently running scans... */
8282 if (iwl_scan_cancel_timeout(priv, 100))
8283 IWL_WARNING("Could not cancel scan.\n");
8284 else {
8285 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8286 flags);
8287 priv->staging_rxon.flags = cpu_to_le32(flags);
8288 iwl_commit_rxon(priv);
8289 }
8290 }
8291 mutex_unlock(&priv->mutex);
8292
8293 return count;
8294}
8295
8296static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8297
8298static ssize_t show_filter_flags(struct device *d,
8299 struct device_attribute *attr, char *buf)
8300{
8301 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8302
8303 return sprintf(buf, "0x%04X\n",
8304 le32_to_cpu(priv->active_rxon.filter_flags));
8305}
8306
8307static ssize_t store_filter_flags(struct device *d,
8308 struct device_attribute *attr,
8309 const char *buf, size_t count)
8310{
8311 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8312 u32 filter_flags = simple_strtoul(buf, NULL, 0);
8313
8314 mutex_lock(&priv->mutex);
8315 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8316 /* Cancel any currently running scans... */
8317 if (iwl_scan_cancel_timeout(priv, 100))
8318 IWL_WARNING("Could not cancel scan.\n");
8319 else {
8320 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8321 "0x%04X\n", filter_flags);
8322 priv->staging_rxon.filter_flags =
8323 cpu_to_le32(filter_flags);
8324 iwl_commit_rxon(priv);
8325 }
8326 }
8327 mutex_unlock(&priv->mutex);
8328
8329 return count;
8330}
8331
8332static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8333 store_filter_flags);
8334
8335static ssize_t show_tune(struct device *d,
8336 struct device_attribute *attr, char *buf)
8337{
8338 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8339
8340 return sprintf(buf, "0x%04X\n",
8341 (priv->phymode << 8) |
8342 le16_to_cpu(priv->active_rxon.channel));
8343}
8344
8345static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8346
8347static ssize_t store_tune(struct device *d,
8348 struct device_attribute *attr,
8349 const char *buf, size_t count)
8350{
8351 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8352 char *p = (char *)buf;
8353 u16 tune = simple_strtoul(p, &p, 0);
8354 u8 phymode = (tune >> 8) & 0xff;
8355 u16 channel = tune & 0xff;
8356
8357 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8358
8359 mutex_lock(&priv->mutex);
8360 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8361 (priv->phymode != phymode)) {
8362 const struct iwl_channel_info *ch_info;
8363
8364 ch_info = iwl_get_channel_info(priv, phymode, channel);
8365 if (!ch_info) {
8366 IWL_WARNING("Requested invalid phymode/channel "
8367 "combination: %d %d\n", phymode, channel);
8368 mutex_unlock(&priv->mutex);
8369 return -EINVAL;
8370 }
8371
8372 /* Cancel any currently running scans... */
8373 if (iwl_scan_cancel_timeout(priv, 100))
8374 IWL_WARNING("Could not cancel scan.\n");
8375 else {
8376 IWL_DEBUG_INFO("Committing phymode and "
8377 "rxon.channel = %d %d\n",
8378 phymode, channel);
8379
8380 iwl_set_rxon_channel(priv, phymode, channel);
8381 iwl_set_flags_for_phymode(priv, phymode);
8382
8383 iwl_set_rate(priv);
8384 iwl_commit_rxon(priv);
8385 }
8386 }
8387 mutex_unlock(&priv->mutex);
8388
8389 return count;
8390}
8391
8392static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8393
8394#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8395
8396static ssize_t show_measurement(struct device *d,
8397 struct device_attribute *attr, char *buf)
8398{
8399 struct iwl_priv *priv = dev_get_drvdata(d);
8400 struct iwl_spectrum_notification measure_report;
8401 u32 size = sizeof(measure_report), len = 0, ofs = 0;
8402 u8 *data = (u8 *) & measure_report;
8403 unsigned long flags;
8404
8405 spin_lock_irqsave(&priv->lock, flags);
8406 if (!(priv->measurement_status & MEASUREMENT_READY)) {
8407 spin_unlock_irqrestore(&priv->lock, flags);
8408 return 0;
8409 }
8410 memcpy(&measure_report, &priv->measure_report, size);
8411 priv->measurement_status = 0;
8412 spin_unlock_irqrestore(&priv->lock, flags);
8413
8414 while (size && (PAGE_SIZE - len)) {
8415 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8416 PAGE_SIZE - len, 1);
8417 len = strlen(buf);
8418 if (PAGE_SIZE - len)
8419 buf[len++] = '\n';
8420
8421 ofs += 16;
8422 size -= min(size, 16U);
8423 }
8424
8425 return len;
8426}
8427
8428static ssize_t store_measurement(struct device *d,
8429 struct device_attribute *attr,
8430 const char *buf, size_t count)
8431{
8432 struct iwl_priv *priv = dev_get_drvdata(d);
8433 struct ieee80211_measurement_params params = {
8434 .channel = le16_to_cpu(priv->active_rxon.channel),
8435 .start_time = cpu_to_le64(priv->last_tsf),
8436 .duration = cpu_to_le16(1),
8437 };
8438 u8 type = IWL_MEASURE_BASIC;
8439 u8 buffer[32];
8440 u8 channel;
8441
8442 if (count) {
8443 char *p = buffer;
8444 strncpy(buffer, buf, min(sizeof(buffer), count));
8445 channel = simple_strtoul(p, NULL, 0);
8446 if (channel)
8447 params.channel = channel;
8448
8449 p = buffer;
8450 while (*p && *p != ' ')
8451 p++;
8452 if (*p)
8453 type = simple_strtoul(p + 1, NULL, 0);
8454 }
8455
8456 IWL_DEBUG_INFO("Invoking measurement of type %d on "
8457 "channel %d (for '%s')\n", type, params.channel, buf);
8458 iwl_get_measurement(priv, &params, type);
8459
8460 return count;
8461}
8462
8463static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8464 show_measurement, store_measurement);
8465#endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8466
8467static ssize_t store_retry_rate(struct device *d,
8468 struct device_attribute *attr,
8469 const char *buf, size_t count)
8470{
8471 struct iwl_priv *priv = dev_get_drvdata(d);
8472
8473 priv->retry_rate = simple_strtoul(buf, NULL, 0);
8474 if (priv->retry_rate <= 0)
8475 priv->retry_rate = 1;
8476
8477 return count;
8478}
8479
8480static ssize_t show_retry_rate(struct device *d,
8481 struct device_attribute *attr, char *buf)
8482{
8483 struct iwl_priv *priv = dev_get_drvdata(d);
8484 return sprintf(buf, "%d", priv->retry_rate);
8485}
8486
8487static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8488 store_retry_rate);
8489
8490static ssize_t store_power_level(struct device *d,
8491 struct device_attribute *attr,
8492 const char *buf, size_t count)
8493{
8494 struct iwl_priv *priv = dev_get_drvdata(d);
8495 int rc;
8496 int mode;
8497
8498 mode = simple_strtoul(buf, NULL, 0);
8499 mutex_lock(&priv->mutex);
8500
8501 if (!iwl_is_ready(priv)) {
8502 rc = -EAGAIN;
8503 goto out;
8504 }
8505
8506 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8507 mode = IWL_POWER_AC;
8508 else
8509 mode |= IWL_POWER_ENABLED;
8510
8511 if (mode != priv->power_mode) {
8512 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8513 if (rc) {
8514 IWL_DEBUG_MAC80211("failed setting power mode.\n");
8515 goto out;
8516 }
8517 priv->power_mode = mode;
8518 }
8519
8520 rc = count;
8521
8522 out:
8523 mutex_unlock(&priv->mutex);
8524 return rc;
8525}
8526
8527#define MAX_WX_STRING 80
8528
8529/* Values are in microsecond */
8530static const s32 timeout_duration[] = {
8531 350000,
8532 250000,
8533 75000,
8534 37000,
8535 25000,
8536};
8537static const s32 period_duration[] = {
8538 400000,
8539 700000,
8540 1000000,
8541 1000000,
8542 1000000
8543};
8544
8545static ssize_t show_power_level(struct device *d,
8546 struct device_attribute *attr, char *buf)
8547{
8548 struct iwl_priv *priv = dev_get_drvdata(d);
8549 int level = IWL_POWER_LEVEL(priv->power_mode);
8550 char *p = buf;
8551
8552 p += sprintf(p, "%d ", level);
8553 switch (level) {
8554 case IWL_POWER_MODE_CAM:
8555 case IWL_POWER_AC:
8556 p += sprintf(p, "(AC)");
8557 break;
8558 case IWL_POWER_BATTERY:
8559 p += sprintf(p, "(BATTERY)");
8560 break;
8561 default:
8562 p += sprintf(p,
8563 "(Timeout %dms, Period %dms)",
8564 timeout_duration[level - 1] / 1000,
8565 period_duration[level - 1] / 1000);
8566 }
8567
8568 if (!(priv->power_mode & IWL_POWER_ENABLED))
8569 p += sprintf(p, " OFF\n");
8570 else
8571 p += sprintf(p, " \n");
8572
8573 return (p - buf + 1);
8574
8575}
8576
8577static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8578 store_power_level);
8579
8580static ssize_t show_channels(struct device *d,
8581 struct device_attribute *attr, char *buf)
8582{
8583 struct iwl_priv *priv = dev_get_drvdata(d);
8584 int len = 0, i;
8585 struct ieee80211_channel *channels = NULL;
8586 const struct ieee80211_hw_mode *hw_mode = NULL;
8587 int count = 0;
8588
8589 if (!iwl_is_ready(priv))
8590 return -EAGAIN;
8591
8592 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8593 if (!hw_mode)
8594 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8595 if (hw_mode) {
8596 channels = hw_mode->channels;
8597 count = hw_mode->num_channels;
8598 }
8599
8600 len +=
8601 sprintf(&buf[len],
8602 "Displaying %d channels in 2.4GHz band "
8603 "(802.11bg):\n", count);
8604
8605 for (i = 0; i < count; i++)
8606 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8607 channels[i].chan,
8608 channels[i].power_level,
8609 channels[i].
8610 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8611 " (IEEE 802.11h required)" : "",
8612 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8613 || (channels[i].
8614 flag &
8615 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8616 ", IBSS",
8617 channels[i].
8618 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8619 "active/passive" : "passive only");
8620
8621 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8622 if (hw_mode) {
8623 channels = hw_mode->channels;
8624 count = hw_mode->num_channels;
8625 } else {
8626 channels = NULL;
8627 count = 0;
8628 }
8629
8630 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8631 "(802.11a):\n", count);
8632
8633 for (i = 0; i < count; i++)
8634 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8635 channels[i].chan,
8636 channels[i].power_level,
8637 channels[i].
8638 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8639 " (IEEE 802.11h required)" : "",
8640 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8641 || (channels[i].
8642 flag &
8643 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8644 ", IBSS",
8645 channels[i].
8646 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8647 "active/passive" : "passive only");
8648
8649 return len;
8650}
8651
8652static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8653
8654static ssize_t show_statistics(struct device *d,
8655 struct device_attribute *attr, char *buf)
8656{
8657 struct iwl_priv *priv = dev_get_drvdata(d);
8658 u32 size = sizeof(struct iwl_notif_statistics);
8659 u32 len = 0, ofs = 0;
8660 u8 *data = (u8 *) & priv->statistics;
8661 int rc = 0;
8662
8663 if (!iwl_is_alive(priv))
8664 return -EAGAIN;
8665
8666 mutex_lock(&priv->mutex);
8667 rc = iwl_send_statistics_request(priv);
8668 mutex_unlock(&priv->mutex);
8669
8670 if (rc) {
8671 len = sprintf(buf,
8672 "Error sending statistics request: 0x%08X\n", rc);
8673 return len;
8674 }
8675
8676 while (size && (PAGE_SIZE - len)) {
8677 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8678 PAGE_SIZE - len, 1);
8679 len = strlen(buf);
8680 if (PAGE_SIZE - len)
8681 buf[len++] = '\n';
8682
8683 ofs += 16;
8684 size -= min(size, 16U);
8685 }
8686
8687 return len;
8688}
8689
8690static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8691
8692static ssize_t show_antenna(struct device *d,
8693 struct device_attribute *attr, char *buf)
8694{
8695 struct iwl_priv *priv = dev_get_drvdata(d);
8696
8697 if (!iwl_is_alive(priv))
8698 return -EAGAIN;
8699
8700 return sprintf(buf, "%d\n", priv->antenna);
8701}
8702
8703static ssize_t store_antenna(struct device *d,
8704 struct device_attribute *attr,
8705 const char *buf, size_t count)
8706{
8707 int ant;
8708 struct iwl_priv *priv = dev_get_drvdata(d);
8709
8710 if (count == 0)
8711 return 0;
8712
8713 if (sscanf(buf, "%1i", &ant) != 1) {
8714 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8715 return count;
8716 }
8717
8718 if ((ant >= 0) && (ant <= 2)) {
8719 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8720 priv->antenna = (enum iwl_antenna)ant;
8721 } else
8722 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8723
8724
8725 return count;
8726}
8727
8728static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8729
8730static ssize_t show_status(struct device *d,
8731 struct device_attribute *attr, char *buf)
8732{
8733 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8734 if (!iwl_is_alive(priv))
8735 return -EAGAIN;
8736 return sprintf(buf, "0x%08x\n", (int)priv->status);
8737}
8738
8739static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8740
8741static ssize_t dump_error_log(struct device *d,
8742 struct device_attribute *attr,
8743 const char *buf, size_t count)
8744{
8745 char *p = (char *)buf;
8746
8747 if (p[0] == '1')
8748 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8749
8750 return strnlen(buf, count);
8751}
8752
8753static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8754
8755static ssize_t dump_event_log(struct device *d,
8756 struct device_attribute *attr,
8757 const char *buf, size_t count)
8758{
8759 char *p = (char *)buf;
8760
8761 if (p[0] == '1')
8762 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8763
8764 return strnlen(buf, count);
8765}
8766
8767static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8768
8769/*****************************************************************************
8770 *
8771 * driver setup and teardown
8772 *
8773 *****************************************************************************/
8774
8775static void iwl_setup_deferred_work(struct iwl_priv *priv)
8776{
8777 priv->workqueue = create_workqueue(DRV_NAME);
8778
8779 init_waitqueue_head(&priv->wait_command_queue);
8780
8781 INIT_WORK(&priv->up, iwl_bg_up);
8782 INIT_WORK(&priv->restart, iwl_bg_restart);
8783 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8784 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8785 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8786 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8787 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8788 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8789 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8790 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8791 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8792 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8793
8794 iwl_hw_setup_deferred_work(priv);
8795
8796 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8797 iwl_irq_tasklet, (unsigned long)priv);
8798}
8799
8800static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8801{
8802 iwl_hw_cancel_deferred_work(priv);
8803
8804 cancel_delayed_work(&priv->scan_check);
8805 cancel_delayed_work(&priv->alive_start);
8806 cancel_delayed_work(&priv->post_associate);
8807 cancel_work_sync(&priv->beacon_update);
8808}
8809
8810static struct attribute *iwl_sysfs_entries[] = {
8811 &dev_attr_antenna.attr,
8812 &dev_attr_channels.attr,
8813 &dev_attr_dump_errors.attr,
8814 &dev_attr_dump_events.attr,
8815 &dev_attr_flags.attr,
8816 &dev_attr_filter_flags.attr,
8817#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8818 &dev_attr_measurement.attr,
8819#endif
8820 &dev_attr_power_level.attr,
8821 &dev_attr_retry_rate.attr,
8822 &dev_attr_rf_kill.attr,
8823 &dev_attr_rs_window.attr,
8824 &dev_attr_statistics.attr,
8825 &dev_attr_status.attr,
8826 &dev_attr_temperature.attr,
8827 &dev_attr_tune.attr,
8828 &dev_attr_tx_power.attr,
8829
8830 NULL
8831};
8832
8833static struct attribute_group iwl_attribute_group = {
8834 .name = NULL, /* put in device directory */
8835 .attrs = iwl_sysfs_entries,
8836};
8837
8838static struct ieee80211_ops iwl_hw_ops = {
8839 .tx = iwl_mac_tx,
8840 .open = iwl_mac_open,
8841 .stop = iwl_mac_stop,
8842 .add_interface = iwl_mac_add_interface,
8843 .remove_interface = iwl_mac_remove_interface,
8844 .config = iwl_mac_config,
8845 .config_interface = iwl_mac_config_interface,
8846 .set_key = iwl_mac_set_key,
8847 .get_stats = iwl_mac_get_stats,
8848 .get_tx_stats = iwl_mac_get_tx_stats,
8849 .conf_tx = iwl_mac_conf_tx,
8850 .get_tsf = iwl_mac_get_tsf,
8851 .reset_tsf = iwl_mac_reset_tsf,
8852 .beacon_update = iwl_mac_beacon_update,
8853#ifdef CONFIG_IWLWIFI_HT
8854 .conf_ht = iwl_mac_conf_ht,
8855 .get_ht_capab = iwl_mac_get_ht_capab,
8856#ifdef CONFIG_IWLWIFI_HT_AGG
8857 .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8858 .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8859 .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8860 .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8861#endif /* CONFIG_IWLWIFI_HT_AGG */
8862#endif /* CONFIG_IWLWIFI_HT */
8863 .hw_scan = iwl_mac_hw_scan
8864};
8865
8866static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8867{
8868 int err = 0;
8869 struct iwl_priv *priv;
8870 struct ieee80211_hw *hw;
8871 int i;
8872
8873 if (iwl_param_disable_hw_scan) {
8874 IWL_DEBUG_INFO("Disabling hw_scan\n");
8875 iwl_hw_ops.hw_scan = NULL;
8876 }
8877
8878 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8879 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8880 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8881 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8882 err = -EINVAL;
8883 goto out;
8884 }
8885
8886 /* mac80211 allocates memory for this device instance, including
8887 * space for this driver's private structure */
8888 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8889 if (hw == NULL) {
8890 IWL_ERROR("Can not allocate network device\n");
8891 err = -ENOMEM;
8892 goto out;
8893 }
8894 SET_IEEE80211_DEV(hw, &pdev->dev);
8895
8896 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8897 priv = hw->priv;
8898 priv->hw = hw;
8899
8900 priv->pci_dev = pdev;
8901 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8902#ifdef CONFIG_IWLWIFI_DEBUG
8903 iwl_debug_level = iwl_param_debug;
8904 atomic_set(&priv->restrict_refcnt, 0);
8905#endif
8906 priv->retry_rate = 1;
8907
8908 priv->ibss_beacon = NULL;
8909
8910 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8911 * the range of signal quality values that we'll provide.
8912 * Negative values for level/noise indicate that we'll provide dBm.
8913 * For WE, at least, non-0 values here *enable* display of values
8914 * in app (iwconfig). */
8915 hw->max_rssi = -20; /* signal level, negative indicates dBm */
8916 hw->max_noise = -20; /* noise level, negative indicates dBm */
8917 hw->max_signal = 100; /* link quality indication (%) */
8918
8919 /* Tell mac80211 our Tx characteristics */
8920 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8921
8922 hw->queues = 4;
8923#ifdef CONFIG_IWLWIFI_HT
8924#ifdef CONFIG_IWLWIFI_HT_AGG
8925 hw->queues = 16;
8926#endif /* CONFIG_IWLWIFI_HT_AGG */
8927#endif /* CONFIG_IWLWIFI_HT */
8928
8929 spin_lock_init(&priv->lock);
8930 spin_lock_init(&priv->power_data.lock);
8931 spin_lock_init(&priv->sta_lock);
8932 spin_lock_init(&priv->hcmd_lock);
8933 spin_lock_init(&priv->lq_mngr.lock);
8934
8935 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8936 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8937
8938 INIT_LIST_HEAD(&priv->free_frames);
8939
8940 mutex_init(&priv->mutex);
8941 if (pci_enable_device(pdev)) {
8942 err = -ENODEV;
8943 goto out_ieee80211_free_hw;
8944 }
8945
8946 pci_set_master(pdev);
8947
8948 iwl_clear_stations_table(priv);
8949
8950 priv->data_retry_limit = -1;
8951 priv->ieee_channels = NULL;
8952 priv->ieee_rates = NULL;
8953 priv->phymode = -1;
8954
8955 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8956 if (!err)
8957 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8958 if (err) {
8959 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8960 goto out_pci_disable_device;
8961 }
8962
8963 pci_set_drvdata(pdev, priv);
8964 err = pci_request_regions(pdev, DRV_NAME);
8965 if (err)
8966 goto out_pci_disable_device;
8967 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8968 * PCI Tx retries from interfering with C3 CPU state */
8969 pci_write_config_byte(pdev, 0x41, 0x00);
8970 priv->hw_base = pci_iomap(pdev, 0, 0);
8971 if (!priv->hw_base) {
8972 err = -ENODEV;
8973 goto out_pci_release_regions;
8974 }
8975
8976 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8977 (unsigned long long) pci_resource_len(pdev, 0));
8978 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8979
8980 /* Initialize module parameter values here */
8981
8982 if (iwl_param_disable) {
8983 set_bit(STATUS_RF_KILL_SW, &priv->status);
8984 IWL_DEBUG_INFO("Radio disabled.\n");
8985 }
8986
8987 priv->iw_mode = IEEE80211_IF_TYPE_STA;
8988
8989 priv->ps_mode = 0;
8990 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
8991 priv->is_ht_enabled = 1;
8992 priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
8993 priv->valid_antenna = 0x7; /* assume all 3 connected */
8994 priv->ps_mode = IWL_MIMO_PS_NONE;
8995 priv->cck_power_index_compensation = iwl_read32(
8996 priv, CSR_HW_REV_WA_REG);
8997
8998 iwl4965_set_rxon_chain(priv);
8999
9000 printk(KERN_INFO DRV_NAME
9001 ": Detected Intel Wireless WiFi Link 4965AGN\n");
9002
9003 /* Device-specific setup */
9004 if (iwl_hw_set_hw_setting(priv)) {
9005 IWL_ERROR("failed to set hw settings\n");
9006 mutex_unlock(&priv->mutex);
9007 goto out_iounmap;
9008 }
9009
9010#ifdef CONFIG_IWLWIFI_QOS
9011 if (iwl_param_qos_enable)
9012 priv->qos_data.qos_enable = 1;
9013
9014 iwl_reset_qos(priv);
9015
9016 priv->qos_data.qos_active = 0;
9017 priv->qos_data.qos_cap.val = 0;
9018#endif /* CONFIG_IWLWIFI_QOS */
9019
9020 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9021 iwl_setup_deferred_work(priv);
9022 iwl_setup_rx_handlers(priv);
9023
9024 priv->rates_mask = IWL_RATES_MASK;
9025 /* If power management is turned on, default to AC mode */
9026 priv->power_mode = IWL_POWER_AC;
9027 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9028
9029 pci_enable_msi(pdev);
9030
9031 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9032 if (err) {
9033 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9034 goto out_disable_msi;
9035 }
9036
9037 mutex_lock(&priv->mutex);
9038
9039 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9040 if (err) {
9041 IWL_ERROR("failed to create sysfs device attributes\n");
9042 mutex_unlock(&priv->mutex);
9043 goto out_release_irq;
9044 }
9045
9046 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9047 * ucode filename and max sizes are card-specific. */
9048 err = iwl_read_ucode(priv);
9049 if (err) {
9050 IWL_ERROR("Could not read microcode: %d\n", err);
9051 mutex_unlock(&priv->mutex);
9052 goto out_pci_alloc;
9053 }
9054
9055 mutex_unlock(&priv->mutex);
9056
9057 IWL_DEBUG_INFO("Queing UP work.\n");
9058
9059 queue_work(priv->workqueue, &priv->up);
9060
9061 return 0;
9062
9063 out_pci_alloc:
9064 iwl_dealloc_ucode_pci(priv);
9065
9066 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9067
9068 out_release_irq:
9069 free_irq(pdev->irq, priv);
9070
9071 out_disable_msi:
9072 pci_disable_msi(pdev);
9073 destroy_workqueue(priv->workqueue);
9074 priv->workqueue = NULL;
9075 iwl_unset_hw_setting(priv);
9076
9077 out_iounmap:
9078 pci_iounmap(pdev, priv->hw_base);
9079 out_pci_release_regions:
9080 pci_release_regions(pdev);
9081 out_pci_disable_device:
9082 pci_disable_device(pdev);
9083 pci_set_drvdata(pdev, NULL);
9084 out_ieee80211_free_hw:
9085 ieee80211_free_hw(priv->hw);
9086 out:
9087 return err;
9088}
9089
9090static void iwl_pci_remove(struct pci_dev *pdev)
9091{
9092 struct iwl_priv *priv = pci_get_drvdata(pdev);
9093 struct list_head *p, *q;
9094 int i;
9095
9096 if (!priv)
9097 return;
9098
9099 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9100
9101 mutex_lock(&priv->mutex);
9102 set_bit(STATUS_EXIT_PENDING, &priv->status);
9103 __iwl_down(priv);
9104 mutex_unlock(&priv->mutex);
9105
9106 /* Free MAC hash list for ADHOC */
9107 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9108 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9109 list_del(p);
9110 kfree(list_entry(p, struct iwl_ibss_seq, list));
9111 }
9112 }
9113
9114 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9115
9116 iwl_dealloc_ucode_pci(priv);
9117
9118 if (priv->rxq.bd)
9119 iwl_rx_queue_free(priv, &priv->rxq);
9120 iwl_hw_txq_ctx_free(priv);
9121
9122 iwl_unset_hw_setting(priv);
9123 iwl_clear_stations_table(priv);
9124
9125 if (priv->mac80211_registered) {
9126 ieee80211_unregister_hw(priv->hw);
9127 iwl_rate_control_unregister(priv->hw);
9128 }
9129
9130 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9131 * priv->workqueue... so we can't take down the workqueue
9132 * until now... */
9133 destroy_workqueue(priv->workqueue);
9134 priv->workqueue = NULL;
9135
9136 free_irq(pdev->irq, priv);
9137 pci_disable_msi(pdev);
9138 pci_iounmap(pdev, priv->hw_base);
9139 pci_release_regions(pdev);
9140 pci_disable_device(pdev);
9141 pci_set_drvdata(pdev, NULL);
9142
9143 kfree(priv->channel_info);
9144
9145 kfree(priv->ieee_channels);
9146 kfree(priv->ieee_rates);
9147
9148 if (priv->ibss_beacon)
9149 dev_kfree_skb(priv->ibss_beacon);
9150
9151 ieee80211_free_hw(priv->hw);
9152}
9153
9154#ifdef CONFIG_PM
9155
9156static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9157{
9158 struct iwl_priv *priv = pci_get_drvdata(pdev);
9159
9160 mutex_lock(&priv->mutex);
9161
9162 set_bit(STATUS_IN_SUSPEND, &priv->status);
9163
9164 /* Take down the device; powers it off, etc. */
9165 __iwl_down(priv);
9166
9167 if (priv->mac80211_registered)
9168 ieee80211_stop_queues(priv->hw);
9169
9170 pci_save_state(pdev);
9171 pci_disable_device(pdev);
9172 pci_set_power_state(pdev, PCI_D3hot);
9173
9174 mutex_unlock(&priv->mutex);
9175
9176 return 0;
9177}
9178
9179static void iwl_resume(struct iwl_priv *priv)
9180{
9181 unsigned long flags;
9182
9183 /* The following it a temporary work around due to the
9184 * suspend / resume not fully initializing the NIC correctly.
9185 * Without all of the following, resume will not attempt to take
9186 * down the NIC (it shouldn't really need to) and will just try
9187 * and bring the NIC back up. However that fails during the
9188 * ucode verification process. This then causes iwl_down to be
9189 * called *after* iwl_hw_nic_init() has succeeded -- which
9190 * then lets the next init sequence succeed. So, we've
9191 * replicated all of that NIC init code here... */
9192
9193 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9194
9195 iwl_hw_nic_init(priv);
9196
9197 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9198 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9199 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9200 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9201 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9202 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9203
9204 /* tell the device to stop sending interrupts */
9205 iwl_disable_interrupts(priv);
9206
9207 spin_lock_irqsave(&priv->lock, flags);
9208 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9209
9210 if (!iwl_grab_restricted_access(priv)) {
9211 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9212 APMG_CLK_VAL_DMA_CLK_RQT);
9213 iwl_release_restricted_access(priv);
9214 }
9215 spin_unlock_irqrestore(&priv->lock, flags);
9216
9217 udelay(5);
9218
9219 iwl_hw_nic_reset(priv);
9220
9221 /* Bring the device back up */
9222 clear_bit(STATUS_IN_SUSPEND, &priv->status);
9223 queue_work(priv->workqueue, &priv->up);
9224}
9225
9226static int iwl_pci_resume(struct pci_dev *pdev)
9227{
9228 struct iwl_priv *priv = pci_get_drvdata(pdev);
9229 int err;
9230
9231 printk(KERN_INFO "Coming out of suspend...\n");
9232
9233 mutex_lock(&priv->mutex);
9234
9235 pci_set_power_state(pdev, PCI_D0);
9236 err = pci_enable_device(pdev);
9237 pci_restore_state(pdev);
9238
9239 /*
9240 * Suspend/Resume resets the PCI configuration space, so we have to
9241 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9242 * from interfering with C3 CPU state. pci_restore_state won't help
9243 * here since it only restores the first 64 bytes pci config header.
9244 */
9245 pci_write_config_byte(pdev, 0x41, 0x00);
9246
9247 iwl_resume(priv);
9248 mutex_unlock(&priv->mutex);
9249
9250 return 0;
9251}
9252
9253#endif /* CONFIG_PM */
9254
9255/*****************************************************************************
9256 *
9257 * driver and module entry point
9258 *
9259 *****************************************************************************/
9260
9261static struct pci_driver iwl_driver = {
9262 .name = DRV_NAME,
9263 .id_table = iwl_hw_card_ids,
9264 .probe = iwl_pci_probe,
9265 .remove = __devexit_p(iwl_pci_remove),
9266#ifdef CONFIG_PM
9267 .suspend = iwl_pci_suspend,
9268 .resume = iwl_pci_resume,
9269#endif
9270};
9271
9272static int __init iwl_init(void)
9273{
9274
9275 int ret;
9276 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9277 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9278 ret = pci_register_driver(&iwl_driver);
9279 if (ret) {
9280 IWL_ERROR("Unable to initialize PCI module\n");
9281 return ret;
9282 }
9283#ifdef CONFIG_IWLWIFI_DEBUG
9284 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9285 if (ret) {
9286 IWL_ERROR("Unable to create driver sysfs file\n");
9287 pci_unregister_driver(&iwl_driver);
9288 return ret;
9289 }
9290#endif
9291
9292 return ret;
9293}
9294
9295static void __exit iwl_exit(void)
9296{
9297#ifdef CONFIG_IWLWIFI_DEBUG
9298 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9299#endif
9300 pci_unregister_driver(&iwl_driver);
9301}
9302
9303module_param_named(antenna, iwl_param_antenna, int, 0444);
9304MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9305module_param_named(disable, iwl_param_disable, int, 0444);
9306MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9307module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9308MODULE_PARM_DESC(hwcrypto,
9309 "using hardware crypto engine (default 0 [software])\n");
9310module_param_named(debug, iwl_param_debug, int, 0444);
9311MODULE_PARM_DESC(debug, "debug output mask");
9312module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9313MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9314
9315module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9316MODULE_PARM_DESC(queues_num, "number of hw queues.");
9317
9318/* QoS */
9319module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9320MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9321
9322module_exit(iwl_exit);
9323module_init(iwl_init);
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