[NET]: Use local_irq_{save,restore}() in napi_complete().
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/version.h>
33 #include <linux/init.h>
34 #include <linux/pci.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/delay.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #include "iwl-4965.h"
49 #include "iwl-helpers.h"
50
51 #ifdef CONFIG_IWL4965_DEBUG
52 u32 iwl4965_debug_level;
53 #endif
54
55 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
56                                   struct iwl4965_tx_queue *txq);
57
58 /******************************************************************************
59  *
60  * module boiler plate
61  *
62  ******************************************************************************/
63
64 /* module parameters */
65 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
66 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
67 static int iwl4965_param_disable;  /* def: enable radio */
68 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
69 int iwl4965_param_hwcrypto;        /* def: using software encryption */
70 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
71 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
72 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
73
74 /*
75  * module name, copyright, version, etc.
76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
77  */
78
79 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
80
81 #ifdef CONFIG_IWL4965_DEBUG
82 #define VD "d"
83 #else
84 #define VD
85 #endif
86
87 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
88 #define VS "s"
89 #else
90 #define VS
91 #endif
92
93 #define IWLWIFI_VERSION "1.2.23k" VD VS
94 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
95 #define DRV_VERSION     IWLWIFI_VERSION
96
97 /* Change firmware file name, using "-" and incrementing number,
98  *   *only* when uCode interface or architecture changes so that it
99  *   is not compatible with earlier drivers.
100  * This number will also appear in << 8 position of 1st dword of uCode file */
101 #define IWL4965_UCODE_API "-1"
102
103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
104 MODULE_VERSION(DRV_VERSION);
105 MODULE_AUTHOR(DRV_COPYRIGHT);
106 MODULE_LICENSE("GPL");
107
108 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
109 {
110         u16 fc = le16_to_cpu(hdr->frame_control);
111         int hdr_len = ieee80211_get_hdrlen(fc);
112
113         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
114                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
115         return NULL;
116 }
117
118 static const struct ieee80211_hw_mode *iwl4965_get_hw_mode(
119                 struct iwl4965_priv *priv, int mode)
120 {
121         int i;
122
123         for (i = 0; i < 3; i++)
124                 if (priv->modes[i].mode == mode)
125                         return &priv->modes[i];
126
127         return NULL;
128 }
129
130 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
131 {
132         /* Single white space is for Linksys APs */
133         if (essid_len == 1 && essid[0] == ' ')
134                 return 1;
135
136         /* Otherwise, if the entire essid is 0, we assume it is hidden */
137         while (essid_len) {
138                 essid_len--;
139                 if (essid[essid_len] != '\0')
140                         return 0;
141         }
142
143         return 1;
144 }
145
146 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
147 {
148         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
149         const char *s = essid;
150         char *d = escaped;
151
152         if (iwl4965_is_empty_essid(essid, essid_len)) {
153                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
154                 return escaped;
155         }
156
157         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
158         while (essid_len--) {
159                 if (*s == '\0') {
160                         *d++ = '\\';
161                         *d++ = '0';
162                         s++;
163                 } else
164                         *d++ = *s++;
165         }
166         *d = '\0';
167         return escaped;
168 }
169
170 static void iwl4965_print_hex_dump(int level, void *p, u32 len)
171 {
172 #ifdef CONFIG_IWL4965_DEBUG
173         if (!(iwl4965_debug_level & level))
174                 return;
175
176         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
177                         p, len, 1);
178 #endif
179 }
180
181 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
182  * DMA services
183  *
184  * Theory of operation
185  *
186  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
187  * of buffer descriptors, each of which points to one or more data buffers for
188  * the device to read from or fill.  Driver and device exchange status of each
189  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
190  * entries in each circular buffer, to protect against confusing empty and full
191  * queue states.
192  *
193  * The device reads or writes the data in the queues via the device's several
194  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
195  *
196  * For Tx queue, there are low mark and high mark limits. If, after queuing
197  * the packet for Tx, free space become < low mark, Tx queue stopped. When
198  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
199  * Tx queue resumed.
200  *
201  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
202  * queue (#4) for sending commands to the device firmware, and 15 other
203  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
204  *
205  * See more detailed info in iwl-4965-hw.h.
206  ***************************************************/
207
208 static int iwl4965_queue_space(const struct iwl4965_queue *q)
209 {
210         int s = q->read_ptr - q->write_ptr;
211
212         if (q->read_ptr > q->write_ptr)
213                 s -= q->n_bd;
214
215         if (s <= 0)
216                 s += q->n_window;
217         /* keep some reserve to not confuse empty and full situations */
218         s -= 2;
219         if (s < 0)
220                 s = 0;
221         return s;
222 }
223
224 /**
225  * iwl4965_queue_inc_wrap - increment queue index, wrap back to beginning
226  * @index -- current index
227  * @n_bd -- total number of entries in queue (must be power of 2)
228  */
229 static inline int iwl4965_queue_inc_wrap(int index, int n_bd)
230 {
231         return ++index & (n_bd - 1);
232 }
233
234 /**
235  * iwl4965_queue_dec_wrap - decrement queue index, wrap back to end
236  * @index -- current index
237  * @n_bd -- total number of entries in queue (must be power of 2)
238  */
239 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
240 {
241         return --index & (n_bd - 1);
242 }
243
244 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
245 {
246         return q->write_ptr > q->read_ptr ?
247                 (i >= q->read_ptr && i < q->write_ptr) :
248                 !(i < q->read_ptr && i >= q->write_ptr);
249 }
250
251 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
252 {
253         /* This is for scan command, the big buffer at end of command array */
254         if (is_huge)
255                 return q->n_window;     /* must be power of 2 */
256
257         /* Otherwise, use normal size buffers */
258         return index & (q->n_window - 1);
259 }
260
261 /**
262  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
263  */
264 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
265                           int count, int slots_num, u32 id)
266 {
267         q->n_bd = count;
268         q->n_window = slots_num;
269         q->id = id;
270
271         /* count must be power-of-two size, otherwise iwl4965_queue_inc_wrap
272          * and iwl4965_queue_dec_wrap are broken. */
273         BUG_ON(!is_power_of_2(count));
274
275         /* slots_num must be power-of-two size, otherwise
276          * get_cmd_index is broken. */
277         BUG_ON(!is_power_of_2(slots_num));
278
279         q->low_mark = q->n_window / 4;
280         if (q->low_mark < 4)
281                 q->low_mark = 4;
282
283         q->high_mark = q->n_window / 8;
284         if (q->high_mark < 2)
285                 q->high_mark = 2;
286
287         q->write_ptr = q->read_ptr = 0;
288
289         return 0;
290 }
291
292 /**
293  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
294  */
295 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
296                               struct iwl4965_tx_queue *txq, u32 id)
297 {
298         struct pci_dev *dev = priv->pci_dev;
299
300         /* Driver private data, only for Tx (not command) queues,
301          * not shared with device. */
302         if (id != IWL_CMD_QUEUE_NUM) {
303                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
304                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
305                 if (!txq->txb) {
306                         IWL_ERROR("kmalloc for auxiliary BD "
307                                   "structures failed\n");
308                         goto error;
309                 }
310         } else
311                 txq->txb = NULL;
312
313         /* Circular buffer of transmit frame descriptors (TFDs),
314          * shared with device */
315         txq->bd = pci_alloc_consistent(dev,
316                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
317                         &txq->q.dma_addr);
318
319         if (!txq->bd) {
320                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
321                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
322                 goto error;
323         }
324         txq->q.id = id;
325
326         return 0;
327
328  error:
329         if (txq->txb) {
330                 kfree(txq->txb);
331                 txq->txb = NULL;
332         }
333
334         return -ENOMEM;
335 }
336
337 /**
338  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
339  */
340 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
341                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
342 {
343         struct pci_dev *dev = priv->pci_dev;
344         int len;
345         int rc = 0;
346
347         /*
348          * Alloc buffer array for commands (Tx or other types of commands).
349          * For the command queue (#4), allocate command space + one big
350          * command for scan, since scan command is very huge; the system will
351          * not have two scans at the same time, so only one is needed.
352          * For normal Tx queues (all other queues), no super-size command
353          * space is needed.
354          */
355         len = sizeof(struct iwl4965_cmd) * slots_num;
356         if (txq_id == IWL_CMD_QUEUE_NUM)
357                 len +=  IWL_MAX_SCAN_SIZE;
358         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
359         if (!txq->cmd)
360                 return -ENOMEM;
361
362         /* Alloc driver data array and TFD circular buffer */
363         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
364         if (rc) {
365                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
366
367                 return -ENOMEM;
368         }
369         txq->need_update = 0;
370
371         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
372          * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */
373         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
374
375         /* Initialize queue's high/low-water marks, and head/tail indexes */
376         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
377
378         /* Tell device where to find queue */
379         iwl4965_hw_tx_queue_init(priv, txq);
380
381         return 0;
382 }
383
384 /**
385  * iwl4965_tx_queue_free - Deallocate DMA queue.
386  * @txq: Transmit queue to deallocate.
387  *
388  * Empty queue by removing and destroying all BD's.
389  * Free all buffers.
390  * 0-fill, but do not free "txq" descriptor structure.
391  */
392 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
393 {
394         struct iwl4965_queue *q = &txq->q;
395         struct pci_dev *dev = priv->pci_dev;
396         int len;
397
398         if (q->n_bd == 0)
399                 return;
400
401         /* first, empty all BD's */
402         for (; q->write_ptr != q->read_ptr;
403              q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd))
404                 iwl4965_hw_txq_free_tfd(priv, txq);
405
406         len = sizeof(struct iwl4965_cmd) * q->n_window;
407         if (q->id == IWL_CMD_QUEUE_NUM)
408                 len += IWL_MAX_SCAN_SIZE;
409
410         /* De-alloc array of command/tx buffers */
411         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
412
413         /* De-alloc circular buffer of TFDs */
414         if (txq->q.n_bd)
415                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
416                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
417
418         /* De-alloc array of per-TFD driver data */
419         if (txq->txb) {
420                 kfree(txq->txb);
421                 txq->txb = NULL;
422         }
423
424         /* 0-fill queue descriptor structure */
425         memset(txq, 0, sizeof(*txq));
426 }
427
428 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
429
430 /*************** STATION TABLE MANAGEMENT ****
431  * mac80211 should be examined to determine if sta_info is duplicating
432  * the functionality provided here
433  */
434
435 /**************************************************************/
436
437 #if 0 /* temporary disable till we add real remove station */
438 /**
439  * iwl4965_remove_station - Remove driver's knowledge of station.
440  *
441  * NOTE:  This does not remove station from device's station table.
442  */
443 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
444 {
445         int index = IWL_INVALID_STATION;
446         int i;
447         unsigned long flags;
448
449         spin_lock_irqsave(&priv->sta_lock, flags);
450
451         if (is_ap)
452                 index = IWL_AP_ID;
453         else if (is_broadcast_ether_addr(addr))
454                 index = priv->hw_setting.bcast_sta_id;
455         else
456                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
457                         if (priv->stations[i].used &&
458                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
459                                                 addr)) {
460                                 index = i;
461                                 break;
462                         }
463
464         if (unlikely(index == IWL_INVALID_STATION))
465                 goto out;
466
467         if (priv->stations[index].used) {
468                 priv->stations[index].used = 0;
469                 priv->num_stations--;
470         }
471
472         BUG_ON(priv->num_stations < 0);
473
474 out:
475         spin_unlock_irqrestore(&priv->sta_lock, flags);
476         return 0;
477 }
478 #endif
479
480 /**
481  * iwl4965_clear_stations_table - Clear the driver's station table
482  *
483  * NOTE:  This does not clear or otherwise alter the device's station table.
484  */
485 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
486 {
487         unsigned long flags;
488
489         spin_lock_irqsave(&priv->sta_lock, flags);
490
491         priv->num_stations = 0;
492         memset(priv->stations, 0, sizeof(priv->stations));
493
494         spin_unlock_irqrestore(&priv->sta_lock, flags);
495 }
496
497 /**
498  * iwl4965_add_station_flags - Add station to tables in driver and device
499  */
500 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
501                                 int is_ap, u8 flags, void *ht_data)
502 {
503         int i;
504         int index = IWL_INVALID_STATION;
505         struct iwl4965_station_entry *station;
506         unsigned long flags_spin;
507         DECLARE_MAC_BUF(mac);
508
509         spin_lock_irqsave(&priv->sta_lock, flags_spin);
510         if (is_ap)
511                 index = IWL_AP_ID;
512         else if (is_broadcast_ether_addr(addr))
513                 index = priv->hw_setting.bcast_sta_id;
514         else
515                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
516                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
517                                                 addr)) {
518                                 index = i;
519                                 break;
520                         }
521
522                         if (!priv->stations[i].used &&
523                             index == IWL_INVALID_STATION)
524                                 index = i;
525                 }
526
527
528         /* These two conditions have the same outcome, but keep them separate
529           since they have different meanings */
530         if (unlikely(index == IWL_INVALID_STATION)) {
531                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
532                 return index;
533         }
534
535         if (priv->stations[index].used &&
536             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
537                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
538                 return index;
539         }
540
541
542         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
543         station = &priv->stations[index];
544         station->used = 1;
545         priv->num_stations++;
546
547         /* Set up the REPLY_ADD_STA command to send to device */
548         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
549         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
550         station->sta.mode = 0;
551         station->sta.sta.sta_id = index;
552         station->sta.station_flags = 0;
553
554 #ifdef CONFIG_IWL4965_HT
555         /* BCAST station and IBSS stations do not work in HT mode */
556         if (index != priv->hw_setting.bcast_sta_id &&
557             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
558                 iwl4965_set_ht_add_station(priv, index,
559                                  (struct ieee80211_ht_info *) ht_data);
560 #endif /*CONFIG_IWL4965_HT*/
561
562         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
563
564         /* Add station to device's station table */
565         iwl4965_send_add_station(priv, &station->sta, flags);
566         return index;
567
568 }
569
570 /*************** DRIVER STATUS FUNCTIONS   *****/
571
572 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
573 {
574         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
575          * set but EXIT_PENDING is not */
576         return test_bit(STATUS_READY, &priv->status) &&
577                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
578                !test_bit(STATUS_EXIT_PENDING, &priv->status);
579 }
580
581 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
582 {
583         return test_bit(STATUS_ALIVE, &priv->status);
584 }
585
586 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
587 {
588         return test_bit(STATUS_INIT, &priv->status);
589 }
590
591 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
592 {
593         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
594                test_bit(STATUS_RF_KILL_SW, &priv->status);
595 }
596
597 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
598 {
599
600         if (iwl4965_is_rfkill(priv))
601                 return 0;
602
603         return iwl4965_is_ready(priv);
604 }
605
606 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
607
608 #define IWL_CMD(x) case x : return #x
609
610 static const char *get_cmd_string(u8 cmd)
611 {
612         switch (cmd) {
613                 IWL_CMD(REPLY_ALIVE);
614                 IWL_CMD(REPLY_ERROR);
615                 IWL_CMD(REPLY_RXON);
616                 IWL_CMD(REPLY_RXON_ASSOC);
617                 IWL_CMD(REPLY_QOS_PARAM);
618                 IWL_CMD(REPLY_RXON_TIMING);
619                 IWL_CMD(REPLY_ADD_STA);
620                 IWL_CMD(REPLY_REMOVE_STA);
621                 IWL_CMD(REPLY_REMOVE_ALL_STA);
622                 IWL_CMD(REPLY_TX);
623                 IWL_CMD(REPLY_RATE_SCALE);
624                 IWL_CMD(REPLY_LEDS_CMD);
625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
626                 IWL_CMD(RADAR_NOTIFICATION);
627                 IWL_CMD(REPLY_QUIET_CMD);
628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
632                 IWL_CMD(POWER_TABLE_CMD);
633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
635                 IWL_CMD(REPLY_SCAN_CMD);
636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
637                 IWL_CMD(SCAN_START_NOTIFICATION);
638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
640                 IWL_CMD(BEACON_NOTIFICATION);
641                 IWL_CMD(REPLY_TX_BEACON);
642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
643                 IWL_CMD(QUIET_NOTIFICATION);
644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
646                 IWL_CMD(REPLY_BT_CONFIG);
647                 IWL_CMD(REPLY_STATISTICS_CMD);
648                 IWL_CMD(STATISTICS_NOTIFICATION);
649                 IWL_CMD(REPLY_CARD_STATE_CMD);
650                 IWL_CMD(CARD_STATE_NOTIFICATION);
651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
652                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
653                 IWL_CMD(SENSITIVITY_CMD);
654                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
655                 IWL_CMD(REPLY_RX_PHY_CMD);
656                 IWL_CMD(REPLY_RX_MPDU_CMD);
657                 IWL_CMD(REPLY_4965_RX);
658                 IWL_CMD(REPLY_COMPRESSED_BA);
659         default:
660                 return "UNKNOWN";
661
662         }
663 }
664
665 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
666
667 /**
668  * iwl4965_enqueue_hcmd - enqueue a uCode command
669  * @priv: device private data point
670  * @cmd: a point to the ucode command structure
671  *
672  * The function returns < 0 values to indicate the operation is
673  * failed. On success, it turns the index (> 0) of command in the
674  * command queue.
675  */
676 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
677 {
678         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
679         struct iwl4965_queue *q = &txq->q;
680         struct iwl4965_tfd_frame *tfd;
681         u32 *control_flags;
682         struct iwl4965_cmd *out_cmd;
683         u32 idx;
684         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
685         dma_addr_t phys_addr;
686         int ret;
687         unsigned long flags;
688
689         /* If any of the command structures end up being larger than
690          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
691          * we will need to increase the size of the TFD entries */
692         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
693                !(cmd->meta.flags & CMD_SIZE_HUGE));
694
695         if (iwl4965_is_rfkill(priv)) {
696                 IWL_DEBUG_INFO("Not sending command - RF KILL");
697                 return -EIO;
698         }
699
700         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
701                 IWL_ERROR("No space for Tx\n");
702                 return -ENOSPC;
703         }
704
705         spin_lock_irqsave(&priv->hcmd_lock, flags);
706
707         tfd = &txq->bd[q->write_ptr];
708         memset(tfd, 0, sizeof(*tfd));
709
710         control_flags = (u32 *) tfd;
711
712         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
713         out_cmd = &txq->cmd[idx];
714
715         out_cmd->hdr.cmd = cmd->id;
716         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
717         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
718
719         /* At this point, the out_cmd now has all of the incoming cmd
720          * information */
721
722         out_cmd->hdr.flags = 0;
723         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
724                         INDEX_TO_SEQ(q->write_ptr));
725         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
726                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
727
728         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
729                         offsetof(struct iwl4965_cmd, hdr);
730         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
731
732         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
733                      "%d bytes at %d[%d]:%d\n",
734                      get_cmd_string(out_cmd->hdr.cmd),
735                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
736                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
737
738         txq->need_update = 1;
739
740         /* Set up entry in queue's byte count circular buffer */
741         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
742
743         /* Increment and update queue's write index */
744         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
745         iwl4965_tx_queue_update_write_ptr(priv, txq);
746
747         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
748         return ret ? ret : idx;
749 }
750
751 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
752 {
753         int ret;
754
755         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
756
757         /* An asynchronous command can not expect an SKB to be set. */
758         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
759
760         /* An asynchronous command MUST have a callback. */
761         BUG_ON(!cmd->meta.u.callback);
762
763         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
764                 return -EBUSY;
765
766         ret = iwl4965_enqueue_hcmd(priv, cmd);
767         if (ret < 0) {
768                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
769                           get_cmd_string(cmd->id), ret);
770                 return ret;
771         }
772         return 0;
773 }
774
775 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
776 {
777         int cmd_idx;
778         int ret;
779         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
780
781         BUG_ON(cmd->meta.flags & CMD_ASYNC);
782
783          /* A synchronous command can not have a callback set. */
784         BUG_ON(cmd->meta.u.callback != NULL);
785
786         if (atomic_xchg(&entry, 1)) {
787                 IWL_ERROR("Error sending %s: Already sending a host command\n",
788                           get_cmd_string(cmd->id));
789                 return -EBUSY;
790         }
791
792         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
793
794         if (cmd->meta.flags & CMD_WANT_SKB)
795                 cmd->meta.source = &cmd->meta;
796
797         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
798         if (cmd_idx < 0) {
799                 ret = cmd_idx;
800                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
801                           get_cmd_string(cmd->id), ret);
802                 goto out;
803         }
804
805         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
806                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
807                         HOST_COMPLETE_TIMEOUT);
808         if (!ret) {
809                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
810                         IWL_ERROR("Error sending %s: time out after %dms.\n",
811                                   get_cmd_string(cmd->id),
812                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
813
814                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
815                         ret = -ETIMEDOUT;
816                         goto cancel;
817                 }
818         }
819
820         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
821                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
822                                get_cmd_string(cmd->id));
823                 ret = -ECANCELED;
824                 goto fail;
825         }
826         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
827                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
828                                get_cmd_string(cmd->id));
829                 ret = -EIO;
830                 goto fail;
831         }
832         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
833                 IWL_ERROR("Error: Response NULL in '%s'\n",
834                           get_cmd_string(cmd->id));
835                 ret = -EIO;
836                 goto out;
837         }
838
839         ret = 0;
840         goto out;
841
842 cancel:
843         if (cmd->meta.flags & CMD_WANT_SKB) {
844                 struct iwl4965_cmd *qcmd;
845
846                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
847                  * TX cmd queue. Otherwise in case the cmd comes
848                  * in later, it will possibly set an invalid
849                  * address (cmd->meta.source). */
850                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
851                 qcmd->meta.flags &= ~CMD_WANT_SKB;
852         }
853 fail:
854         if (cmd->meta.u.skb) {
855                 dev_kfree_skb_any(cmd->meta.u.skb);
856                 cmd->meta.u.skb = NULL;
857         }
858 out:
859         atomic_set(&entry, 0);
860         return ret;
861 }
862
863 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
864 {
865         if (cmd->meta.flags & CMD_ASYNC)
866                 return iwl4965_send_cmd_async(priv, cmd);
867
868         return iwl4965_send_cmd_sync(priv, cmd);
869 }
870
871 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
872 {
873         struct iwl4965_host_cmd cmd = {
874                 .id = id,
875                 .len = len,
876                 .data = data,
877         };
878
879         return iwl4965_send_cmd_sync(priv, &cmd);
880 }
881
882 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
883 {
884         struct iwl4965_host_cmd cmd = {
885                 .id = id,
886                 .len = sizeof(val),
887                 .data = &val,
888         };
889
890         return iwl4965_send_cmd_sync(priv, &cmd);
891 }
892
893 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
894 {
895         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
896 }
897
898 /**
899  * iwl4965_rxon_add_station - add station into station table.
900  *
901  * there is only one AP station with id= IWL_AP_ID
902  * NOTE: mutex must be held before calling this fnction
903  */
904 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
905                                 const u8 *addr, int is_ap)
906 {
907         u8 sta_id;
908
909         /* Add station to device's station table */
910 #ifdef CONFIG_IWL4965_HT
911         struct ieee80211_conf *conf = &priv->hw->conf;
912         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
913
914         if ((is_ap) &&
915             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
916             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
917                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
918                                                    0, cur_ht_config);
919         else
920 #endif /* CONFIG_IWL4965_HT */
921                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
922                                                    0, NULL);
923
924         /* Set up default rate scaling table in device's station table */
925         iwl4965_add_station(priv, addr, is_ap);
926
927         return sta_id;
928 }
929
930 /**
931  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
932  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
933  * @channel: Any channel valid for the requested phymode
934
935  * In addition to setting the staging RXON, priv->phymode is also set.
936  *
937  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
938  * in the staging RXON flag structure based on the phymode
939  */
940 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode,
941                                  u16 channel)
942 {
943         if (!iwl4965_get_channel_info(priv, phymode, channel)) {
944                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
945                                channel, phymode);
946                 return -EINVAL;
947         }
948
949         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
950             (priv->phymode == phymode))
951                 return 0;
952
953         priv->staging_rxon.channel = cpu_to_le16(channel);
954         if (phymode == MODE_IEEE80211A)
955                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
956         else
957                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
958
959         priv->phymode = phymode;
960
961         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
962
963         return 0;
964 }
965
966 /**
967  * iwl4965_check_rxon_cmd - validate RXON structure is valid
968  *
969  * NOTE:  This is really only useful during development and can eventually
970  * be #ifdef'd out once the driver is stable and folks aren't actively
971  * making changes
972  */
973 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
974 {
975         int error = 0;
976         int counter = 1;
977
978         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
979                 error |= le32_to_cpu(rxon->flags &
980                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
981                                  RXON_FLG_RADAR_DETECT_MSK));
982                 if (error)
983                         IWL_WARNING("check 24G fields %d | %d\n",
984                                     counter++, error);
985         } else {
986                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
987                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
988                 if (error)
989                         IWL_WARNING("check 52 fields %d | %d\n",
990                                     counter++, error);
991                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
992                 if (error)
993                         IWL_WARNING("check 52 CCK %d | %d\n",
994                                     counter++, error);
995         }
996         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
997         if (error)
998                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
999
1000         /* make sure basic rates 6Mbps and 1Mbps are supported */
1001         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
1002                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
1003         if (error)
1004                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
1005
1006         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
1007         if (error)
1008                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
1009
1010         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
1011                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
1012         if (error)
1013                 IWL_WARNING("check CCK and short slot %d | %d\n",
1014                             counter++, error);
1015
1016         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
1017                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
1018         if (error)
1019                 IWL_WARNING("check CCK & auto detect %d | %d\n",
1020                             counter++, error);
1021
1022         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
1023                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
1024         if (error)
1025                 IWL_WARNING("check TGG and auto detect %d | %d\n",
1026                             counter++, error);
1027
1028         if (error)
1029                 IWL_WARNING("Tuning to channel %d\n",
1030                             le16_to_cpu(rxon->channel));
1031
1032         if (error) {
1033                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
1034                 return -1;
1035         }
1036         return 0;
1037 }
1038
1039 /**
1040  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1041  * @priv: staging_rxon is compared to active_rxon
1042  *
1043  * If the RXON structure is changing enough to require a new tune,
1044  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1045  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1046  */
1047 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1048 {
1049
1050         /* These items are only settable from the full RXON command */
1051         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1052             compare_ether_addr(priv->staging_rxon.bssid_addr,
1053                                priv->active_rxon.bssid_addr) ||
1054             compare_ether_addr(priv->staging_rxon.node_addr,
1055                                priv->active_rxon.node_addr) ||
1056             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1057                                priv->active_rxon.wlap_bssid_addr) ||
1058             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1059             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1060             (priv->staging_rxon.air_propagation !=
1061              priv->active_rxon.air_propagation) ||
1062             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1063              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1064             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1065              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1066             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1067             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1068                 return 1;
1069
1070         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1071          * be updated with the RXON_ASSOC command -- however only some
1072          * flag transitions are allowed using RXON_ASSOC */
1073
1074         /* Check if we are not switching bands */
1075         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1076             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1077                 return 1;
1078
1079         /* Check if we are switching association toggle */
1080         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1081                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1082                 return 1;
1083
1084         return 0;
1085 }
1086
1087 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1088 {
1089         int rc = 0;
1090         struct iwl4965_rx_packet *res = NULL;
1091         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1092         struct iwl4965_host_cmd cmd = {
1093                 .id = REPLY_RXON_ASSOC,
1094                 .len = sizeof(rxon_assoc),
1095                 .meta.flags = CMD_WANT_SKB,
1096                 .data = &rxon_assoc,
1097         };
1098         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1099         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1100
1101         if ((rxon1->flags == rxon2->flags) &&
1102             (rxon1->filter_flags == rxon2->filter_flags) &&
1103             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1104             (rxon1->ofdm_ht_single_stream_basic_rates ==
1105              rxon2->ofdm_ht_single_stream_basic_rates) &&
1106             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1107              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1108             (rxon1->rx_chain == rxon2->rx_chain) &&
1109             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1110                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1111                 return 0;
1112         }
1113
1114         rxon_assoc.flags = priv->staging_rxon.flags;
1115         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1116         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1117         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1118         rxon_assoc.reserved = 0;
1119         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1120             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1121         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1122             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1123         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1124
1125         rc = iwl4965_send_cmd_sync(priv, &cmd);
1126         if (rc)
1127                 return rc;
1128
1129         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1130         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1131                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1132                 rc = -EIO;
1133         }
1134
1135         priv->alloc_rxb_skb--;
1136         dev_kfree_skb_any(cmd.meta.u.skb);
1137
1138         return rc;
1139 }
1140
1141 /**
1142  * iwl4965_commit_rxon - commit staging_rxon to hardware
1143  *
1144  * The RXON command in staging_rxon is committed to the hardware and
1145  * the active_rxon structure is updated with the new data.  This
1146  * function correctly transitions out of the RXON_ASSOC_MSK state if
1147  * a HW tune is required based on the RXON structure changes.
1148  */
1149 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1150 {
1151         /* cast away the const for active_rxon in this function */
1152         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1153         DECLARE_MAC_BUF(mac);
1154         int rc = 0;
1155
1156         if (!iwl4965_is_alive(priv))
1157                 return -1;
1158
1159         /* always get timestamp with Rx frame */
1160         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1161
1162         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1163         if (rc) {
1164                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1165                 return -EINVAL;
1166         }
1167
1168         /* If we don't need to send a full RXON, we can use
1169          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1170          * and other flags for the current radio configuration. */
1171         if (!iwl4965_full_rxon_required(priv)) {
1172                 rc = iwl4965_send_rxon_assoc(priv);
1173                 if (rc) {
1174                         IWL_ERROR("Error setting RXON_ASSOC "
1175                                   "configuration (%d).\n", rc);
1176                         return rc;
1177                 }
1178
1179                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1180
1181                 return 0;
1182         }
1183
1184         /* station table will be cleared */
1185         priv->assoc_station_added = 0;
1186
1187 #ifdef CONFIG_IWL4965_SENSITIVITY
1188         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1189         if (!priv->error_recovering)
1190                 priv->start_calib = 0;
1191
1192         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1193 #endif /* CONFIG_IWL4965_SENSITIVITY */
1194
1195         /* If we are currently associated and the new config requires
1196          * an RXON_ASSOC and the new config wants the associated mask enabled,
1197          * we must clear the associated from the active configuration
1198          * before we apply the new config */
1199         if (iwl4965_is_associated(priv) &&
1200             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1201                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1202                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1203
1204                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1205                                       sizeof(struct iwl4965_rxon_cmd),
1206                                       &priv->active_rxon);
1207
1208                 /* If the mask clearing failed then we set
1209                  * active_rxon back to what it was previously */
1210                 if (rc) {
1211                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1212                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1213                                   "configuration (%d).\n", rc);
1214                         return rc;
1215                 }
1216         }
1217
1218         IWL_DEBUG_INFO("Sending RXON\n"
1219                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1220                        "* channel = %d\n"
1221                        "* bssid = %s\n",
1222                        ((priv->staging_rxon.filter_flags &
1223                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1224                        le16_to_cpu(priv->staging_rxon.channel),
1225                        print_mac(mac, priv->staging_rxon.bssid_addr));
1226
1227         /* Apply the new configuration */
1228         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1229                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1230         if (rc) {
1231                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1232                 return rc;
1233         }
1234
1235         iwl4965_clear_stations_table(priv);
1236
1237 #ifdef CONFIG_IWL4965_SENSITIVITY
1238         if (!priv->error_recovering)
1239                 priv->start_calib = 0;
1240
1241         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1242         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1243 #endif /* CONFIG_IWL4965_SENSITIVITY */
1244
1245         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1246
1247         /* If we issue a new RXON command which required a tune then we must
1248          * send a new TXPOWER command or we won't be able to Tx any frames */
1249         rc = iwl4965_hw_reg_send_txpower(priv);
1250         if (rc) {
1251                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1252                 return rc;
1253         }
1254
1255         /* Add the broadcast address so we can send broadcast frames */
1256         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1257             IWL_INVALID_STATION) {
1258                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1259                 return -EIO;
1260         }
1261
1262         /* If we have set the ASSOC_MSK and we are in BSS mode then
1263          * add the IWL_AP_ID to the station rate table */
1264         if (iwl4965_is_associated(priv) &&
1265             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1266                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1267                     == IWL_INVALID_STATION) {
1268                         IWL_ERROR("Error adding AP address for transmit.\n");
1269                         return -EIO;
1270                 }
1271                 priv->assoc_station_added = 1;
1272         }
1273
1274         return 0;
1275 }
1276
1277 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1278 {
1279         struct iwl4965_bt_cmd bt_cmd = {
1280                 .flags = 3,
1281                 .lead_time = 0xAA,
1282                 .max_kill = 1,
1283                 .kill_ack_mask = 0,
1284                 .kill_cts_mask = 0,
1285         };
1286
1287         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1288                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1289 }
1290
1291 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1292 {
1293         int rc = 0;
1294         struct iwl4965_rx_packet *res;
1295         struct iwl4965_host_cmd cmd = {
1296                 .id = REPLY_SCAN_ABORT_CMD,
1297                 .meta.flags = CMD_WANT_SKB,
1298         };
1299
1300         /* If there isn't a scan actively going on in the hardware
1301          * then we are in between scan bands and not actually
1302          * actively scanning, so don't send the abort command */
1303         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1304                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1305                 return 0;
1306         }
1307
1308         rc = iwl4965_send_cmd_sync(priv, &cmd);
1309         if (rc) {
1310                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1311                 return rc;
1312         }
1313
1314         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1315         if (res->u.status != CAN_ABORT_STATUS) {
1316                 /* The scan abort will return 1 for success or
1317                  * 2 for "failure".  A failure condition can be
1318                  * due to simply not being in an active scan which
1319                  * can occur if we send the scan abort before we
1320                  * the microcode has notified us that a scan is
1321                  * completed. */
1322                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1323                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1324                 clear_bit(STATUS_SCAN_HW, &priv->status);
1325         }
1326
1327         dev_kfree_skb_any(cmd.meta.u.skb);
1328
1329         return rc;
1330 }
1331
1332 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1333                                         struct iwl4965_cmd *cmd,
1334                                         struct sk_buff *skb)
1335 {
1336         return 1;
1337 }
1338
1339 /*
1340  * CARD_STATE_CMD
1341  *
1342  * Use: Sets the device's internal card state to enable, disable, or halt
1343  *
1344  * When in the 'enable' state the card operates as normal.
1345  * When in the 'disable' state, the card enters into a low power mode.
1346  * When in the 'halt' state, the card is shut down and must be fully
1347  * restarted to come back on.
1348  */
1349 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1350 {
1351         struct iwl4965_host_cmd cmd = {
1352                 .id = REPLY_CARD_STATE_CMD,
1353                 .len = sizeof(u32),
1354                 .data = &flags,
1355                 .meta.flags = meta_flag,
1356         };
1357
1358         if (meta_flag & CMD_ASYNC)
1359                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1360
1361         return iwl4965_send_cmd(priv, &cmd);
1362 }
1363
1364 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1365                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1366 {
1367         struct iwl4965_rx_packet *res = NULL;
1368
1369         if (!skb) {
1370                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1371                 return 1;
1372         }
1373
1374         res = (struct iwl4965_rx_packet *)skb->data;
1375         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1376                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1377                           res->hdr.flags);
1378                 return 1;
1379         }
1380
1381         switch (res->u.add_sta.status) {
1382         case ADD_STA_SUCCESS_MSK:
1383                 break;
1384         default:
1385                 break;
1386         }
1387
1388         /* We didn't cache the SKB; let the caller free it */
1389         return 1;
1390 }
1391
1392 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1393                          struct iwl4965_addsta_cmd *sta, u8 flags)
1394 {
1395         struct iwl4965_rx_packet *res = NULL;
1396         int rc = 0;
1397         struct iwl4965_host_cmd cmd = {
1398                 .id = REPLY_ADD_STA,
1399                 .len = sizeof(struct iwl4965_addsta_cmd),
1400                 .meta.flags = flags,
1401                 .data = sta,
1402         };
1403
1404         if (flags & CMD_ASYNC)
1405                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1406         else
1407                 cmd.meta.flags |= CMD_WANT_SKB;
1408
1409         rc = iwl4965_send_cmd(priv, &cmd);
1410
1411         if (rc || (flags & CMD_ASYNC))
1412                 return rc;
1413
1414         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1415         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1416                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1417                           res->hdr.flags);
1418                 rc = -EIO;
1419         }
1420
1421         if (rc == 0) {
1422                 switch (res->u.add_sta.status) {
1423                 case ADD_STA_SUCCESS_MSK:
1424                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1425                         break;
1426                 default:
1427                         rc = -EIO;
1428                         IWL_WARNING("REPLY_ADD_STA failed\n");
1429                         break;
1430                 }
1431         }
1432
1433         priv->alloc_rxb_skb--;
1434         dev_kfree_skb_any(cmd.meta.u.skb);
1435
1436         return rc;
1437 }
1438
1439 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1440                                    struct ieee80211_key_conf *keyconf,
1441                                    u8 sta_id)
1442 {
1443         unsigned long flags;
1444         __le16 key_flags = 0;
1445
1446         switch (keyconf->alg) {
1447         case ALG_CCMP:
1448                 key_flags |= STA_KEY_FLG_CCMP;
1449                 key_flags |= cpu_to_le16(
1450                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1451                 key_flags &= ~STA_KEY_FLG_INVALID;
1452                 break;
1453         case ALG_TKIP:
1454         case ALG_WEP:
1455         default:
1456                 return -EINVAL;
1457         }
1458         spin_lock_irqsave(&priv->sta_lock, flags);
1459         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1460         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1461         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1462                keyconf->keylen);
1463
1464         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1465                keyconf->keylen);
1466         priv->stations[sta_id].sta.key.key_flags = key_flags;
1467         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1468         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1469
1470         spin_unlock_irqrestore(&priv->sta_lock, flags);
1471
1472         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1473         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1474         return 0;
1475 }
1476
1477 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1478 {
1479         unsigned long flags;
1480
1481         spin_lock_irqsave(&priv->sta_lock, flags);
1482         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1483         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1484         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1485         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1486         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1487         spin_unlock_irqrestore(&priv->sta_lock, flags);
1488
1489         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1490         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1491         return 0;
1492 }
1493
1494 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1495 {
1496         struct list_head *element;
1497
1498         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1499                        priv->frames_count);
1500
1501         while (!list_empty(&priv->free_frames)) {
1502                 element = priv->free_frames.next;
1503                 list_del(element);
1504                 kfree(list_entry(element, struct iwl4965_frame, list));
1505                 priv->frames_count--;
1506         }
1507
1508         if (priv->frames_count) {
1509                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1510                             priv->frames_count);
1511                 priv->frames_count = 0;
1512         }
1513 }
1514
1515 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1516 {
1517         struct iwl4965_frame *frame;
1518         struct list_head *element;
1519         if (list_empty(&priv->free_frames)) {
1520                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1521                 if (!frame) {
1522                         IWL_ERROR("Could not allocate frame!\n");
1523                         return NULL;
1524                 }
1525
1526                 priv->frames_count++;
1527                 return frame;
1528         }
1529
1530         element = priv->free_frames.next;
1531         list_del(element);
1532         return list_entry(element, struct iwl4965_frame, list);
1533 }
1534
1535 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1536 {
1537         memset(frame, 0, sizeof(*frame));
1538         list_add(&frame->list, &priv->free_frames);
1539 }
1540
1541 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1542                                 struct ieee80211_hdr *hdr,
1543                                 const u8 *dest, int left)
1544 {
1545
1546         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1547             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1548              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1549                 return 0;
1550
1551         if (priv->ibss_beacon->len > left)
1552                 return 0;
1553
1554         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1555
1556         return priv->ibss_beacon->len;
1557 }
1558
1559 int iwl4965_rate_index_from_plcp(int plcp)
1560 {
1561         int i = 0;
1562
1563         /* 4965 HT rate format */
1564         if (plcp & RATE_MCS_HT_MSK) {
1565                 i = (plcp & 0xff);
1566
1567                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1568                         i = i - IWL_RATE_MIMO_6M_PLCP;
1569
1570                 i += IWL_FIRST_OFDM_RATE;
1571                 /* skip 9M not supported in ht*/
1572                 if (i >= IWL_RATE_9M_INDEX)
1573                         i += 1;
1574                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1575                     (i <= IWL_LAST_OFDM_RATE))
1576                         return i;
1577
1578         /* 4965 legacy rate format, search for match in table */
1579         } else {
1580                 for (i = 0; i < ARRAY_SIZE(iwl4965_rates); i++)
1581                         if (iwl4965_rates[i].plcp == (plcp &0xFF))
1582                                 return i;
1583         }
1584         return -1;
1585 }
1586
1587 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1588 {
1589         u8 i;
1590
1591         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1592              i = iwl4965_rates[i].next_ieee) {
1593                 if (rate_mask & (1 << i))
1594                         return iwl4965_rates[i].plcp;
1595         }
1596
1597         return IWL_RATE_INVALID;
1598 }
1599
1600 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1601 {
1602         struct iwl4965_frame *frame;
1603         unsigned int frame_size;
1604         int rc;
1605         u8 rate;
1606
1607         frame = iwl4965_get_free_frame(priv);
1608
1609         if (!frame) {
1610                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1611                           "command.\n");
1612                 return -ENOMEM;
1613         }
1614
1615         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1616                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1617                                                 0xFF0);
1618                 if (rate == IWL_INVALID_RATE)
1619                         rate = IWL_RATE_6M_PLCP;
1620         } else {
1621                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1622                 if (rate == IWL_INVALID_RATE)
1623                         rate = IWL_RATE_1M_PLCP;
1624         }
1625
1626         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1627
1628         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1629                               &frame->u.cmd[0]);
1630
1631         iwl4965_free_frame(priv, frame);
1632
1633         return rc;
1634 }
1635
1636 /******************************************************************************
1637  *
1638  * EEPROM related functions
1639  *
1640  ******************************************************************************/
1641
1642 static void get_eeprom_mac(struct iwl4965_priv *priv, u8 *mac)
1643 {
1644         memcpy(mac, priv->eeprom.mac_address, 6);
1645 }
1646
1647 static inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
1648 {
1649         iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1650                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
1651 }
1652
1653 /**
1654  * iwl4965_eeprom_init - read EEPROM contents
1655  *
1656  * Load the EEPROM contents from adapter into priv->eeprom
1657  *
1658  * NOTE:  This routine uses the non-debug IO access functions.
1659  */
1660 int iwl4965_eeprom_init(struct iwl4965_priv *priv)
1661 {
1662         u16 *e = (u16 *)&priv->eeprom;
1663         u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
1664         u32 r;
1665         int sz = sizeof(priv->eeprom);
1666         int rc;
1667         int i;
1668         u16 addr;
1669
1670         /* The EEPROM structure has several padding buffers within it
1671          * and when adding new EEPROM maps is subject to programmer errors
1672          * which may be very difficult to identify without explicitly
1673          * checking the resulting size of the eeprom map. */
1674         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1675
1676         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1677                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1678                 return -ENOENT;
1679         }
1680
1681         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1682         rc = iwl4965_eeprom_acquire_semaphore(priv);
1683         if (rc < 0) {
1684                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1685                 return -ENOENT;
1686         }
1687
1688         /* eeprom is an array of 16bit values */
1689         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1690                 _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
1691                 _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1692
1693                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1694                                         i += IWL_EEPROM_ACCESS_DELAY) {
1695                         r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
1696                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1697                                 break;
1698                         udelay(IWL_EEPROM_ACCESS_DELAY);
1699                 }
1700
1701                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1702                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1703                         rc = -ETIMEDOUT;
1704                         goto done;
1705                 }
1706                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1707         }
1708         rc = 0;
1709
1710 done:
1711         iwl4965_eeprom_release_semaphore(priv);
1712         return rc;
1713 }
1714
1715 /******************************************************************************
1716  *
1717  * Misc. internal state and helper functions
1718  *
1719  ******************************************************************************/
1720 #ifdef CONFIG_IWL4965_DEBUG
1721
1722 /**
1723  * iwl4965_report_frame - dump frame to syslog during debug sessions
1724  *
1725  * You may hack this function to show different aspects of received frames,
1726  * including selective frame dumps.
1727  * group100 parameter selects whether to show 1 out of 100 good frames.
1728  *
1729  * TODO:  This was originally written for 3945, need to audit for
1730  *        proper operation with 4965.
1731  */
1732 void iwl4965_report_frame(struct iwl4965_priv *priv,
1733                       struct iwl4965_rx_packet *pkt,
1734                       struct ieee80211_hdr *header, int group100)
1735 {
1736         u32 to_us;
1737         u32 print_summary = 0;
1738         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1739         u32 hundred = 0;
1740         u32 dataframe = 0;
1741         u16 fc;
1742         u16 seq_ctl;
1743         u16 channel;
1744         u16 phy_flags;
1745         int rate_sym;
1746         u16 length;
1747         u16 status;
1748         u16 bcn_tmr;
1749         u32 tsf_low;
1750         u64 tsf;
1751         u8 rssi;
1752         u8 agc;
1753         u16 sig_avg;
1754         u16 noise_diff;
1755         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1756         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1757         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
1758         u8 *data = IWL_RX_DATA(pkt);
1759
1760         /* MAC header */
1761         fc = le16_to_cpu(header->frame_control);
1762         seq_ctl = le16_to_cpu(header->seq_ctrl);
1763
1764         /* metadata */
1765         channel = le16_to_cpu(rx_hdr->channel);
1766         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1767         rate_sym = rx_hdr->rate;
1768         length = le16_to_cpu(rx_hdr->len);
1769
1770         /* end-of-frame status and timestamp */
1771         status = le32_to_cpu(rx_end->status);
1772         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1773         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1774         tsf = le64_to_cpu(rx_end->timestamp);
1775
1776         /* signal statistics */
1777         rssi = rx_stats->rssi;
1778         agc = rx_stats->agc;
1779         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1780         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1781
1782         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1783
1784         /* if data frame is to us and all is good,
1785          *   (optionally) print summary for only 1 out of every 100 */
1786         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1787             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1788                 dataframe = 1;
1789                 if (!group100)
1790                         print_summary = 1;      /* print each frame */
1791                 else if (priv->framecnt_to_us < 100) {
1792                         priv->framecnt_to_us++;
1793                         print_summary = 0;
1794                 } else {
1795                         priv->framecnt_to_us = 0;
1796                         print_summary = 1;
1797                         hundred = 1;
1798                 }
1799         } else {
1800                 /* print summary for all other frames */
1801                 print_summary = 1;
1802         }
1803
1804         if (print_summary) {
1805                 char *title;
1806                 u32 rate;
1807
1808                 if (hundred)
1809                         title = "100Frames";
1810                 else if (fc & IEEE80211_FCTL_RETRY)
1811                         title = "Retry";
1812                 else if (ieee80211_is_assoc_response(fc))
1813                         title = "AscRsp";
1814                 else if (ieee80211_is_reassoc_response(fc))
1815                         title = "RasRsp";
1816                 else if (ieee80211_is_probe_response(fc)) {
1817                         title = "PrbRsp";
1818                         print_dump = 1; /* dump frame contents */
1819                 } else if (ieee80211_is_beacon(fc)) {
1820                         title = "Beacon";
1821                         print_dump = 1; /* dump frame contents */
1822                 } else if (ieee80211_is_atim(fc))
1823                         title = "ATIM";
1824                 else if (ieee80211_is_auth(fc))
1825                         title = "Auth";
1826                 else if (ieee80211_is_deauth(fc))
1827                         title = "DeAuth";
1828                 else if (ieee80211_is_disassoc(fc))
1829                         title = "DisAssoc";
1830                 else
1831                         title = "Frame";
1832
1833                 rate = iwl4965_rate_index_from_plcp(rate_sym);
1834                 if (rate == -1)
1835                         rate = 0;
1836                 else
1837                         rate = iwl4965_rates[rate].ieee / 2;
1838
1839                 /* print frame summary.
1840                  * MAC addresses show just the last byte (for brevity),
1841                  *    but you can hack it to show more, if you'd like to. */
1842                 if (dataframe)
1843                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1844                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1845                                      title, fc, header->addr1[5],
1846                                      length, rssi, channel, rate);
1847                 else {
1848                         /* src/dst addresses assume managed mode */
1849                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1850                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1851                                      "phy=0x%02x, chnl=%d\n",
1852                                      title, fc, header->addr1[5],
1853                                      header->addr3[5], rssi,
1854                                      tsf_low - priv->scan_start_tsf,
1855                                      phy_flags, channel);
1856                 }
1857         }
1858         if (print_dump)
1859                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
1860 }
1861 #endif
1862
1863 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1864 {
1865         if (priv->hw_setting.shared_virt)
1866                 pci_free_consistent(priv->pci_dev,
1867                                     sizeof(struct iwl4965_shared),
1868                                     priv->hw_setting.shared_virt,
1869                                     priv->hw_setting.shared_phys);
1870 }
1871
1872 /**
1873  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1874  *
1875  * return : set the bit for each supported rate insert in ie
1876  */
1877 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1878                                     u16 basic_rate, int *left)
1879 {
1880         u16 ret_rates = 0, bit;
1881         int i;
1882         u8 *cnt = ie;
1883         u8 *rates = ie + 1;
1884
1885         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1886                 if (bit & supported_rate) {
1887                         ret_rates |= bit;
1888                         rates[*cnt] = iwl4965_rates[i].ieee |
1889                                 ((bit & basic_rate) ? 0x80 : 0x00);
1890                         (*cnt)++;
1891                         (*left)--;
1892                         if ((*left <= 0) ||
1893                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1894                                 break;
1895                 }
1896         }
1897
1898         return ret_rates;
1899 }
1900
1901 #ifdef CONFIG_IWL4965_HT
1902 void static iwl4965_set_ht_capab(struct ieee80211_hw *hw,
1903                              struct ieee80211_ht_cap *ht_cap,
1904                              u8 use_current_config);
1905 #endif
1906
1907 /**
1908  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1909  */
1910 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1911                               struct ieee80211_mgmt *frame,
1912                               int left, int is_direct)
1913 {
1914         int len = 0;
1915         u8 *pos = NULL;
1916         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1917 #ifdef CONFIG_IWL4965_HT
1918         struct ieee80211_hw_mode *mode;
1919 #endif /* CONFIG_IWL4965_HT */
1920
1921         /* Make sure there is enough space for the probe request,
1922          * two mandatory IEs and the data */
1923         left -= 24;
1924         if (left < 0)
1925                 return 0;
1926         len += 24;
1927
1928         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1929         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1930         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1931         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1932         frame->seq_ctrl = 0;
1933
1934         /* fill in our indirect SSID IE */
1935         /* ...next IE... */
1936
1937         left -= 2;
1938         if (left < 0)
1939                 return 0;
1940         len += 2;
1941         pos = &(frame->u.probe_req.variable[0]);
1942         *pos++ = WLAN_EID_SSID;
1943         *pos++ = 0;
1944
1945         /* fill in our direct SSID IE... */
1946         if (is_direct) {
1947                 /* ...next IE... */
1948                 left -= 2 + priv->essid_len;
1949                 if (left < 0)
1950                         return 0;
1951                 /* ... fill it in... */
1952                 *pos++ = WLAN_EID_SSID;
1953                 *pos++ = priv->essid_len;
1954                 memcpy(pos, priv->essid, priv->essid_len);
1955                 pos += priv->essid_len;
1956                 len += 2 + priv->essid_len;
1957         }
1958
1959         /* fill in supported rate */
1960         /* ...next IE... */
1961         left -= 2;
1962         if (left < 0)
1963                 return 0;
1964
1965         /* ... fill it in... */
1966         *pos++ = WLAN_EID_SUPP_RATES;
1967         *pos = 0;
1968
1969         /* exclude 60M rate */
1970         active_rates = priv->rates_mask;
1971         active_rates &= ~IWL_RATE_60M_MASK;
1972
1973         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1974
1975         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1976         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1977                         active_rate_basic, &left);
1978         active_rates &= ~ret_rates;
1979
1980         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1981                                  active_rate_basic, &left);
1982         active_rates &= ~ret_rates;
1983
1984         len += 2 + *pos;
1985         pos += (*pos) + 1;
1986         if (active_rates == 0)
1987                 goto fill_end;
1988
1989         /* fill in supported extended rate */
1990         /* ...next IE... */
1991         left -= 2;
1992         if (left < 0)
1993                 return 0;
1994         /* ... fill it in... */
1995         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1996         *pos = 0;
1997         iwl4965_supported_rate_to_ie(pos, active_rates,
1998                                  active_rate_basic, &left);
1999         if (*pos > 0)
2000                 len += 2 + *pos;
2001
2002 #ifdef CONFIG_IWL4965_HT
2003         mode = priv->hw->conf.mode;
2004         if (mode->ht_info.ht_supported) {
2005                 pos += (*pos) + 1;
2006                 *pos++ = WLAN_EID_HT_CAPABILITY;
2007                 *pos++ = sizeof(struct ieee80211_ht_cap);
2008                 iwl4965_set_ht_capab(priv->hw,
2009                                 (struct ieee80211_ht_cap *)pos, 0);
2010                 len += 2 + sizeof(struct ieee80211_ht_cap);
2011         }
2012 #endif  /*CONFIG_IWL4965_HT */
2013
2014  fill_end:
2015         return (u16)len;
2016 }
2017
2018 /*
2019  * QoS  support
2020 */
2021 #ifdef CONFIG_IWL4965_QOS
2022 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
2023                                        struct iwl4965_qosparam_cmd *qos)
2024 {
2025
2026         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
2027                                 sizeof(struct iwl4965_qosparam_cmd), qos);
2028 }
2029
2030 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
2031 {
2032         u16 cw_min = 15;
2033         u16 cw_max = 1023;
2034         u8 aifs = 2;
2035         u8 is_legacy = 0;
2036         unsigned long flags;
2037         int i;
2038
2039         spin_lock_irqsave(&priv->lock, flags);
2040         priv->qos_data.qos_active = 0;
2041
2042         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
2043                 if (priv->qos_data.qos_enable)
2044                         priv->qos_data.qos_active = 1;
2045                 if (!(priv->active_rate & 0xfff0)) {
2046                         cw_min = 31;
2047                         is_legacy = 1;
2048                 }
2049         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2050                 if (priv->qos_data.qos_enable)
2051                         priv->qos_data.qos_active = 1;
2052         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
2053                 cw_min = 31;
2054                 is_legacy = 1;
2055         }
2056
2057         if (priv->qos_data.qos_active)
2058                 aifs = 3;
2059
2060         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
2061         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
2062         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
2063         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
2064         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
2065
2066         if (priv->qos_data.qos_active) {
2067                 i = 1;
2068                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
2069                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
2070                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
2071                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2072                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2073
2074                 i = 2;
2075                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2076                         cpu_to_le16((cw_min + 1) / 2 - 1);
2077                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2078                         cpu_to_le16(cw_max);
2079                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2080                 if (is_legacy)
2081                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2082                                 cpu_to_le16(6016);
2083                 else
2084                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2085                                 cpu_to_le16(3008);
2086                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2087
2088                 i = 3;
2089                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2090                         cpu_to_le16((cw_min + 1) / 4 - 1);
2091                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2092                         cpu_to_le16((cw_max + 1) / 2 - 1);
2093                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2094                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2095                 if (is_legacy)
2096                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2097                                 cpu_to_le16(3264);
2098                 else
2099                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2100                                 cpu_to_le16(1504);
2101         } else {
2102                 for (i = 1; i < 4; i++) {
2103                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2104                                 cpu_to_le16(cw_min);
2105                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2106                                 cpu_to_le16(cw_max);
2107                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2108                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2109                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2110                 }
2111         }
2112         IWL_DEBUG_QOS("set QoS to default \n");
2113
2114         spin_unlock_irqrestore(&priv->lock, flags);
2115 }
2116
2117 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
2118 {
2119         unsigned long flags;
2120
2121         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2122                 return;
2123
2124         if (!priv->qos_data.qos_enable)
2125                 return;
2126
2127         spin_lock_irqsave(&priv->lock, flags);
2128         priv->qos_data.def_qos_parm.qos_flags = 0;
2129
2130         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2131             !priv->qos_data.qos_cap.q_AP.txop_request)
2132                 priv->qos_data.def_qos_parm.qos_flags |=
2133                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2134         if (priv->qos_data.qos_active)
2135                 priv->qos_data.def_qos_parm.qos_flags |=
2136                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2137
2138 #ifdef CONFIG_IWL4965_HT
2139         if (priv->current_ht_config.is_ht)
2140                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2141 #endif /* CONFIG_IWL4965_HT */
2142
2143         spin_unlock_irqrestore(&priv->lock, flags);
2144
2145         if (force || iwl4965_is_associated(priv)) {
2146                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2147                                 priv->qos_data.qos_active,
2148                                 priv->qos_data.def_qos_parm.qos_flags);
2149
2150                 iwl4965_send_qos_params_command(priv,
2151                                 &(priv->qos_data.def_qos_parm));
2152         }
2153 }
2154
2155 #endif /* CONFIG_IWL4965_QOS */
2156 /*
2157  * Power management (not Tx power!) functions
2158  */
2159 #define MSEC_TO_USEC 1024
2160
2161 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2162 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2163 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2164 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2165                                      __constant_cpu_to_le32(X1), \
2166                                      __constant_cpu_to_le32(X2), \
2167                                      __constant_cpu_to_le32(X3), \
2168                                      __constant_cpu_to_le32(X4)}
2169
2170
2171 /* default power management (not Tx power) table values */
2172 /* for tim  0-10 */
2173 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
2174         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2175         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2176         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2177         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2178         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2179         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2180 };
2181
2182 /* for tim > 10 */
2183 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
2184         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2185         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2186                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2187         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2188                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2189         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2190                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2191         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2192         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2193                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2194 };
2195
2196 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
2197 {
2198         int rc = 0, i;
2199         struct iwl4965_power_mgr *pow_data;
2200         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
2201         u16 pci_pm;
2202
2203         IWL_DEBUG_POWER("Initialize power \n");
2204
2205         pow_data = &(priv->power_data);
2206
2207         memset(pow_data, 0, sizeof(*pow_data));
2208
2209         pow_data->active_index = IWL_POWER_RANGE_0;
2210         pow_data->dtim_val = 0xffff;
2211
2212         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2213         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2214
2215         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2216         if (rc != 0)
2217                 return 0;
2218         else {
2219                 struct iwl4965_powertable_cmd *cmd;
2220
2221                 IWL_DEBUG_POWER("adjust power command flags\n");
2222
2223                 for (i = 0; i < IWL_POWER_AC; i++) {
2224                         cmd = &pow_data->pwr_range_0[i].cmd;
2225
2226                         if (pci_pm & 0x1)
2227                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2228                         else
2229                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2230                 }
2231         }
2232         return rc;
2233 }
2234
2235 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
2236                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
2237 {
2238         int rc = 0, i;
2239         u8 skip;
2240         u32 max_sleep = 0;
2241         struct iwl4965_power_vec_entry *range;
2242         u8 period = 0;
2243         struct iwl4965_power_mgr *pow_data;
2244
2245         if (mode > IWL_POWER_INDEX_5) {
2246                 IWL_DEBUG_POWER("Error invalid power mode \n");
2247                 return -1;
2248         }
2249         pow_data = &(priv->power_data);
2250
2251         if (pow_data->active_index == IWL_POWER_RANGE_0)
2252                 range = &pow_data->pwr_range_0[0];
2253         else
2254                 range = &pow_data->pwr_range_1[1];
2255
2256         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
2257
2258 #ifdef IWL_MAC80211_DISABLE
2259         if (priv->assoc_network != NULL) {
2260                 unsigned long flags;
2261
2262                 period = priv->assoc_network->tim.tim_period;
2263         }
2264 #endif  /*IWL_MAC80211_DISABLE */
2265         skip = range[mode].no_dtim;
2266
2267         if (period == 0) {
2268                 period = 1;
2269                 skip = 0;
2270         }
2271
2272         if (skip == 0) {
2273                 max_sleep = period;
2274                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2275         } else {
2276                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2277                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2278                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2279         }
2280
2281         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2282                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2283                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2284         }
2285
2286         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2287         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2288         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2289         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2290                         le32_to_cpu(cmd->sleep_interval[0]),
2291                         le32_to_cpu(cmd->sleep_interval[1]),
2292                         le32_to_cpu(cmd->sleep_interval[2]),
2293                         le32_to_cpu(cmd->sleep_interval[3]),
2294                         le32_to_cpu(cmd->sleep_interval[4]));
2295
2296         return rc;
2297 }
2298
2299 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2300 {
2301         u32 uninitialized_var(final_mode);
2302         int rc;
2303         struct iwl4965_powertable_cmd cmd;
2304
2305         /* If on battery, set to 3,
2306          * if plugged into AC power, set to CAM ("continuously aware mode"),
2307          * else user level */
2308         switch (mode) {
2309         case IWL_POWER_BATTERY:
2310                 final_mode = IWL_POWER_INDEX_3;
2311                 break;
2312         case IWL_POWER_AC:
2313                 final_mode = IWL_POWER_MODE_CAM;
2314                 break;
2315         default:
2316                 final_mode = mode;
2317                 break;
2318         }
2319
2320         cmd.keep_alive_beacons = 0;
2321
2322         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2323
2324         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2325
2326         if (final_mode == IWL_POWER_MODE_CAM)
2327                 clear_bit(STATUS_POWER_PMI, &priv->status);
2328         else
2329                 set_bit(STATUS_POWER_PMI, &priv->status);
2330
2331         return rc;
2332 }
2333
2334 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2335 {
2336         /* Filter incoming packets to determine if they are targeted toward
2337          * this network, discarding packets coming from ourselves */
2338         switch (priv->iw_mode) {
2339         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2340                 /* packets from our adapter are dropped (echo) */
2341                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2342                         return 0;
2343                 /* {broad,multi}cast packets to our IBSS go through */
2344                 if (is_multicast_ether_addr(header->addr1))
2345                         return !compare_ether_addr(header->addr3, priv->bssid);
2346                 /* packets to our adapter go through */
2347                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2348         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2349                 /* packets from our adapter are dropped (echo) */
2350                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2351                         return 0;
2352                 /* {broad,multi}cast packets to our BSS go through */
2353                 if (is_multicast_ether_addr(header->addr1))
2354                         return !compare_ether_addr(header->addr2, priv->bssid);
2355                 /* packets to our adapter go through */
2356                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2357         }
2358
2359         return 1;
2360 }
2361
2362 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2363
2364 static const char *iwl4965_get_tx_fail_reason(u32 status)
2365 {
2366         switch (status & TX_STATUS_MSK) {
2367         case TX_STATUS_SUCCESS:
2368                 return "SUCCESS";
2369                 TX_STATUS_ENTRY(SHORT_LIMIT);
2370                 TX_STATUS_ENTRY(LONG_LIMIT);
2371                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2372                 TX_STATUS_ENTRY(MGMNT_ABORT);
2373                 TX_STATUS_ENTRY(NEXT_FRAG);
2374                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2375                 TX_STATUS_ENTRY(DEST_PS);
2376                 TX_STATUS_ENTRY(ABORTED);
2377                 TX_STATUS_ENTRY(BT_RETRY);
2378                 TX_STATUS_ENTRY(STA_INVALID);
2379                 TX_STATUS_ENTRY(FRAG_DROPPED);
2380                 TX_STATUS_ENTRY(TID_DISABLE);
2381                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2382                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2383                 TX_STATUS_ENTRY(TX_LOCKED);
2384                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2385         }
2386
2387         return "UNKNOWN";
2388 }
2389
2390 /**
2391  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2392  *
2393  * NOTE: priv->mutex is not required before calling this function
2394  */
2395 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2396 {
2397         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2398                 clear_bit(STATUS_SCANNING, &priv->status);
2399                 return 0;
2400         }
2401
2402         if (test_bit(STATUS_SCANNING, &priv->status)) {
2403                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2404                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2405                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2406                         queue_work(priv->workqueue, &priv->abort_scan);
2407
2408                 } else
2409                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2410
2411                 return test_bit(STATUS_SCANNING, &priv->status);
2412         }
2413
2414         return 0;
2415 }
2416
2417 /**
2418  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2419  * @ms: amount of time to wait (in milliseconds) for scan to abort
2420  *
2421  * NOTE: priv->mutex must be held before calling this function
2422  */
2423 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2424 {
2425         unsigned long now = jiffies;
2426         int ret;
2427
2428         ret = iwl4965_scan_cancel(priv);
2429         if (ret && ms) {
2430                 mutex_unlock(&priv->mutex);
2431                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2432                                 test_bit(STATUS_SCANNING, &priv->status))
2433                         msleep(1);
2434                 mutex_lock(&priv->mutex);
2435
2436                 return test_bit(STATUS_SCANNING, &priv->status);
2437         }
2438
2439         return ret;
2440 }
2441
2442 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2443 {
2444         /* Reset ieee stats */
2445
2446         /* We don't reset the net_device_stats (ieee->stats) on
2447          * re-association */
2448
2449         priv->last_seq_num = -1;
2450         priv->last_frag_num = -1;
2451         priv->last_packet_time = 0;
2452
2453         iwl4965_scan_cancel(priv);
2454 }
2455
2456 #define MAX_UCODE_BEACON_INTERVAL       4096
2457 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2458
2459 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2460 {
2461         u16 new_val = 0;
2462         u16 beacon_factor = 0;
2463
2464         beacon_factor =
2465             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2466                 / MAX_UCODE_BEACON_INTERVAL;
2467         new_val = beacon_val / beacon_factor;
2468
2469         return cpu_to_le16(new_val);
2470 }
2471
2472 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2473 {
2474         u64 interval_tm_unit;
2475         u64 tsf, result;
2476         unsigned long flags;
2477         struct ieee80211_conf *conf = NULL;
2478         u16 beacon_int = 0;
2479
2480         conf = ieee80211_get_hw_conf(priv->hw);
2481
2482         spin_lock_irqsave(&priv->lock, flags);
2483         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2484         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2485
2486         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2487
2488         tsf = priv->timestamp1;
2489         tsf = ((tsf << 32) | priv->timestamp0);
2490
2491         beacon_int = priv->beacon_int;
2492         spin_unlock_irqrestore(&priv->lock, flags);
2493
2494         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2495                 if (beacon_int == 0) {
2496                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2497                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2498                 } else {
2499                         priv->rxon_timing.beacon_interval =
2500                                 cpu_to_le16(beacon_int);
2501                         priv->rxon_timing.beacon_interval =
2502                             iwl4965_adjust_beacon_interval(
2503                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2504                 }
2505
2506                 priv->rxon_timing.atim_window = 0;
2507         } else {
2508                 priv->rxon_timing.beacon_interval =
2509                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2510                 /* TODO: we need to get atim_window from upper stack
2511                  * for now we set to 0 */
2512                 priv->rxon_timing.atim_window = 0;
2513         }
2514
2515         interval_tm_unit =
2516                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2517         result = do_div(tsf, interval_tm_unit);
2518         priv->rxon_timing.beacon_init_val =
2519             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2520
2521         IWL_DEBUG_ASSOC
2522             ("beacon interval %d beacon timer %d beacon tim %d\n",
2523                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2524                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2525                 le16_to_cpu(priv->rxon_timing.atim_window));
2526 }
2527
2528 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2529 {
2530         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2531                 IWL_ERROR("APs don't scan.\n");
2532                 return 0;
2533         }
2534
2535         if (!iwl4965_is_ready_rf(priv)) {
2536                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2537                 return -EIO;
2538         }
2539
2540         if (test_bit(STATUS_SCANNING, &priv->status)) {
2541                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2542                 return -EAGAIN;
2543         }
2544
2545         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2546                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2547                                "Queuing.\n");
2548                 return -EAGAIN;
2549         }
2550
2551         IWL_DEBUG_INFO("Starting scan...\n");
2552         priv->scan_bands = 2;
2553         set_bit(STATUS_SCANNING, &priv->status);
2554         priv->scan_start = jiffies;
2555         priv->scan_pass_start = priv->scan_start;
2556
2557         queue_work(priv->workqueue, &priv->request_scan);
2558
2559         return 0;
2560 }
2561
2562 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2563 {
2564         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2565
2566         if (hw_decrypt)
2567                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2568         else
2569                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2570
2571         return 0;
2572 }
2573
2574 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode)
2575 {
2576         if (phymode == MODE_IEEE80211A) {
2577                 priv->staging_rxon.flags &=
2578                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2579                       | RXON_FLG_CCK_MSK);
2580                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2581         } else {
2582                 /* Copied from iwl4965_bg_post_associate() */
2583                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2584                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2585                 else
2586                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2587
2588                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2589                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2590
2591                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2592                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2593                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2594         }
2595 }
2596
2597 /*
2598  * initialize rxon structure with default values from eeprom
2599  */
2600 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2601 {
2602         const struct iwl4965_channel_info *ch_info;
2603
2604         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2605
2606         switch (priv->iw_mode) {
2607         case IEEE80211_IF_TYPE_AP:
2608                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2609                 break;
2610
2611         case IEEE80211_IF_TYPE_STA:
2612                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2613                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2614                 break;
2615
2616         case IEEE80211_IF_TYPE_IBSS:
2617                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2618                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2619                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2620                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2621                 break;
2622
2623         case IEEE80211_IF_TYPE_MNTR:
2624                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2625                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2626                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2627                 break;
2628         }
2629
2630 #if 0
2631         /* TODO:  Figure out when short_preamble would be set and cache from
2632          * that */
2633         if (!hw_to_local(priv->hw)->short_preamble)
2634                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2635         else
2636                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2637 #endif
2638
2639         ch_info = iwl4965_get_channel_info(priv, priv->phymode,
2640                                        le16_to_cpu(priv->staging_rxon.channel));
2641
2642         if (!ch_info)
2643                 ch_info = &priv->channel_info[0];
2644
2645         /*
2646          * in some case A channels are all non IBSS
2647          * in this case force B/G channel
2648          */
2649         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2650             !(is_channel_ibss(ch_info)))
2651                 ch_info = &priv->channel_info[0];
2652
2653         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2654         if (is_channel_a_band(ch_info))
2655                 priv->phymode = MODE_IEEE80211A;
2656         else
2657                 priv->phymode = MODE_IEEE80211G;
2658
2659         iwl4965_set_flags_for_phymode(priv, priv->phymode);
2660
2661         priv->staging_rxon.ofdm_basic_rates =
2662             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2663         priv->staging_rxon.cck_basic_rates =
2664             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2665
2666         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2667                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2668         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2669         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2670         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2671         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2672         iwl4965_set_rxon_chain(priv);
2673 }
2674
2675 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2676 {
2677         if (mode == IEEE80211_IF_TYPE_IBSS) {
2678                 const struct iwl4965_channel_info *ch_info;
2679
2680                 ch_info = iwl4965_get_channel_info(priv,
2681                         priv->phymode,
2682                         le16_to_cpu(priv->staging_rxon.channel));
2683
2684                 if (!ch_info || !is_channel_ibss(ch_info)) {
2685                         IWL_ERROR("channel %d not IBSS channel\n",
2686                                   le16_to_cpu(priv->staging_rxon.channel));
2687                         return -EINVAL;
2688                 }
2689         }
2690
2691         priv->iw_mode = mode;
2692
2693         iwl4965_connection_init_rx_config(priv);
2694         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2695
2696         iwl4965_clear_stations_table(priv);
2697
2698         /* dont commit rxon if rf-kill is on*/
2699         if (!iwl4965_is_ready_rf(priv))
2700                 return -EAGAIN;
2701
2702         cancel_delayed_work(&priv->scan_check);
2703         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2704                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2705                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2706                 return -EAGAIN;
2707         }
2708
2709         iwl4965_commit_rxon(priv);
2710
2711         return 0;
2712 }
2713
2714 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2715                                       struct ieee80211_tx_control *ctl,
2716                                       struct iwl4965_cmd *cmd,
2717                                       struct sk_buff *skb_frag,
2718                                       int last_frag)
2719 {
2720         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2721
2722         switch (keyinfo->alg) {
2723         case ALG_CCMP:
2724                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2725                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2726                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2727                 break;
2728
2729         case ALG_TKIP:
2730 #if 0
2731                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2732
2733                 if (last_frag)
2734                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2735                                8);
2736                 else
2737                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2738 #endif
2739                 break;
2740
2741         case ALG_WEP:
2742                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2743                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2744
2745                 if (keyinfo->keylen == 13)
2746                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2747
2748                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2749
2750                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2751                              "with key %d\n", ctl->key_idx);
2752                 break;
2753
2754         default:
2755                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2756                 break;
2757         }
2758 }
2759
2760 /*
2761  * handle build REPLY_TX command notification.
2762  */
2763 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2764                                   struct iwl4965_cmd *cmd,
2765                                   struct ieee80211_tx_control *ctrl,
2766                                   struct ieee80211_hdr *hdr,
2767                                   int is_unicast, u8 std_id)
2768 {
2769         __le16 *qc;
2770         u16 fc = le16_to_cpu(hdr->frame_control);
2771         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2772
2773         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2774         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2775                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2776                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2777                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2778                 if (ieee80211_is_probe_response(fc) &&
2779                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2780                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2781         } else {
2782                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2783                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2784         }
2785
2786         if (ieee80211_is_back_request(fc))
2787                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2788
2789
2790         cmd->cmd.tx.sta_id = std_id;
2791         if (ieee80211_get_morefrag(hdr))
2792                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2793
2794         qc = ieee80211_get_qos_ctrl(hdr);
2795         if (qc) {
2796                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2797                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2798         } else
2799                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2800
2801         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2802                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2803                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2804         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2805                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2806                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2807         }
2808
2809         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2810                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2811
2812         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2813         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2814                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2815                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2816                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2817                 else
2818                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2819         } else
2820                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2821
2822         cmd->cmd.tx.driver_txop = 0;
2823         cmd->cmd.tx.tx_flags = tx_flags;
2824         cmd->cmd.tx.next_frame_len = 0;
2825 }
2826
2827 /**
2828  * iwl4965_get_sta_id - Find station's index within station table
2829  *
2830  * If new IBSS station, create new entry in station table
2831  */
2832 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2833                                 struct ieee80211_hdr *hdr)
2834 {
2835         int sta_id;
2836         u16 fc = le16_to_cpu(hdr->frame_control);
2837         DECLARE_MAC_BUF(mac);
2838
2839         /* If this frame is broadcast or management, use broadcast station id */
2840         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2841             is_multicast_ether_addr(hdr->addr1))
2842                 return priv->hw_setting.bcast_sta_id;
2843
2844         switch (priv->iw_mode) {
2845
2846         /* If we are a client station in a BSS network, use the special
2847          * AP station entry (that's the only station we communicate with) */
2848         case IEEE80211_IF_TYPE_STA:
2849                 return IWL_AP_ID;
2850
2851         /* If we are an AP, then find the station, or use BCAST */
2852         case IEEE80211_IF_TYPE_AP:
2853                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2854                 if (sta_id != IWL_INVALID_STATION)
2855                         return sta_id;
2856                 return priv->hw_setting.bcast_sta_id;
2857
2858         /* If this frame is going out to an IBSS network, find the station,
2859          * or create a new station table entry */
2860         case IEEE80211_IF_TYPE_IBSS:
2861                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2862                 if (sta_id != IWL_INVALID_STATION)
2863                         return sta_id;
2864
2865                 /* Create new station table entry */
2866                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2867                                                    0, CMD_ASYNC, NULL);
2868
2869                 if (sta_id != IWL_INVALID_STATION)
2870                         return sta_id;
2871
2872                 IWL_DEBUG_DROP("Station %s not in station map. "
2873                                "Defaulting to broadcast...\n",
2874                                print_mac(mac, hdr->addr1));
2875                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2876                 return priv->hw_setting.bcast_sta_id;
2877
2878         default:
2879                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2880                 return priv->hw_setting.bcast_sta_id;
2881         }
2882 }
2883
2884 /*
2885  * start REPLY_TX command process
2886  */
2887 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2888                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2889 {
2890         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2891         struct iwl4965_tfd_frame *tfd;
2892         u32 *control_flags;
2893         int txq_id = ctl->queue;
2894         struct iwl4965_tx_queue *txq = NULL;
2895         struct iwl4965_queue *q = NULL;
2896         dma_addr_t phys_addr;
2897         dma_addr_t txcmd_phys;
2898         dma_addr_t scratch_phys;
2899         struct iwl4965_cmd *out_cmd = NULL;
2900         u16 len, idx, len_org;
2901         u8 id, hdr_len, unicast;
2902         u8 sta_id;
2903         u16 seq_number = 0;
2904         u16 fc;
2905         __le16 *qc;
2906         u8 wait_write_ptr = 0;
2907         unsigned long flags;
2908         int rc;
2909
2910         spin_lock_irqsave(&priv->lock, flags);
2911         if (iwl4965_is_rfkill(priv)) {
2912                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2913                 goto drop_unlock;
2914         }
2915
2916         if (!priv->vif) {
2917                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2918                 goto drop_unlock;
2919         }
2920
2921         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2922                 IWL_ERROR("ERROR: No TX rate available.\n");
2923                 goto drop_unlock;
2924         }
2925
2926         unicast = !is_multicast_ether_addr(hdr->addr1);
2927         id = 0;
2928
2929         fc = le16_to_cpu(hdr->frame_control);
2930
2931 #ifdef CONFIG_IWL4965_DEBUG
2932         if (ieee80211_is_auth(fc))
2933                 IWL_DEBUG_TX("Sending AUTH frame\n");
2934         else if (ieee80211_is_assoc_request(fc))
2935                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2936         else if (ieee80211_is_reassoc_request(fc))
2937                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2938 #endif
2939
2940         /* drop all data frame if we are not associated */
2941         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2942            (!iwl4965_is_associated(priv) ||
2943             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2944             !priv->assoc_station_added)) {
2945                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2946                 goto drop_unlock;
2947         }
2948
2949         spin_unlock_irqrestore(&priv->lock, flags);
2950
2951         hdr_len = ieee80211_get_hdrlen(fc);
2952
2953         /* Find (or create) index into station table for destination station */
2954         sta_id = iwl4965_get_sta_id(priv, hdr);
2955         if (sta_id == IWL_INVALID_STATION) {
2956                 DECLARE_MAC_BUF(mac);
2957
2958                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2959                                print_mac(mac, hdr->addr1));
2960                 goto drop;
2961         }
2962
2963         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2964
2965         qc = ieee80211_get_qos_ctrl(hdr);
2966         if (qc) {
2967                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2968                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2969                                 IEEE80211_SCTL_SEQ;
2970                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2971                         (hdr->seq_ctrl &
2972                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2973                 seq_number += 0x10;
2974 #ifdef CONFIG_IWL4965_HT
2975 #ifdef CONFIG_IWL4965_HT_AGG
2976                 /* aggregation is on for this <sta,tid> */
2977                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2978                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2979 #endif /* CONFIG_IWL4965_HT_AGG */
2980 #endif /* CONFIG_IWL4965_HT */
2981         }
2982
2983         /* Descriptor for chosen Tx queue */
2984         txq = &priv->txq[txq_id];
2985         q = &txq->q;
2986
2987         spin_lock_irqsave(&priv->lock, flags);
2988
2989         /* Set up first empty TFD within this queue's circular TFD buffer */
2990         tfd = &txq->bd[q->write_ptr];
2991         memset(tfd, 0, sizeof(*tfd));
2992         control_flags = (u32 *) tfd;
2993         idx = get_cmd_index(q, q->write_ptr, 0);
2994
2995         /* Set up driver data for this TFD */
2996         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2997         txq->txb[q->write_ptr].skb[0] = skb;
2998         memcpy(&(txq->txb[q->write_ptr].status.control),
2999                ctl, sizeof(struct ieee80211_tx_control));
3000
3001         /* Set up first empty entry in queue's array of Tx/cmd buffers */
3002         out_cmd = &txq->cmd[idx];
3003         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
3004         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
3005
3006         /*
3007          * Set up the Tx-command (not MAC!) header.
3008          * Store the chosen Tx queue and TFD index within the sequence field;
3009          * after Tx, uCode's Tx response will return this value so driver can
3010          * locate the frame within the tx queue and do post-tx processing.
3011          */
3012         out_cmd->hdr.cmd = REPLY_TX;
3013         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
3014                                 INDEX_TO_SEQ(q->write_ptr)));
3015
3016         /* Copy MAC header from skb into command buffer */
3017         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
3018
3019         /*
3020          * Use the first empty entry in this queue's command buffer array
3021          * to contain the Tx command and MAC header concatenated together
3022          * (payload data will be in another buffer).
3023          * Size of this varies, due to varying MAC header length.
3024          * If end is not dword aligned, we'll have 2 extra bytes at the end
3025          * of the MAC header (device reads on dword boundaries).
3026          * We'll tell device about this padding later.
3027          */
3028         len = priv->hw_setting.tx_cmd_len +
3029                 sizeof(struct iwl4965_cmd_header) + hdr_len;
3030
3031         len_org = len;
3032         len = (len + 3) & ~3;
3033
3034         if (len_org != len)
3035                 len_org = 1;
3036         else
3037                 len_org = 0;
3038
3039         /* Physical address of this Tx command's header (not MAC header!),
3040          * within command buffer array. */
3041         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
3042                      offsetof(struct iwl4965_cmd, hdr);
3043
3044         /* Add buffer containing Tx command and MAC(!) header to TFD's
3045          * first entry */
3046         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
3047
3048         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
3049                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
3050
3051         /* Set up TFD's 2nd entry to point directly to remainder of skb,
3052          * if any (802.11 null frames have no payload). */
3053         len = skb->len - hdr_len;
3054         if (len) {
3055                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
3056                                            len, PCI_DMA_TODEVICE);
3057                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
3058         }
3059
3060         /* Tell 4965 about any 2-byte padding after MAC header */
3061         if (len_org)
3062                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
3063
3064         /* Total # bytes to be transmitted */
3065         len = (u16)skb->len;
3066         out_cmd->cmd.tx.len = cpu_to_le16(len);
3067
3068         /* TODO need this for burst mode later on */
3069         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
3070
3071         /* set is_hcca to 0; it probably will never be implemented */
3072         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
3073
3074         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3075                 offsetof(struct iwl4965_tx_cmd, scratch);
3076         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
3077         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3078
3079 #ifdef CONFIG_IWL4965_HT_AGG
3080 #ifdef CONFIG_IWL4965_HT
3081         /* TODO: move this functionality to rate scaling */
3082         iwl4965_tl_get_stats(priv, hdr);
3083 #endif /* CONFIG_IWL4965_HT_AGG */
3084 #endif /*CONFIG_IWL4965_HT */
3085
3086
3087         if (!ieee80211_get_morefrag(hdr)) {
3088                 txq->need_update = 1;
3089                 if (qc) {
3090                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
3091                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
3092                 }
3093         } else {
3094                 wait_write_ptr = 1;
3095                 txq->need_update = 0;
3096         }
3097
3098         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
3099                            sizeof(out_cmd->cmd.tx));
3100
3101         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
3102                            ieee80211_get_hdrlen(fc));
3103
3104         /* Set up entry for this TFD in Tx byte-count array */
3105         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
3106
3107         /* Tell device the write index *just past* this latest filled TFD */
3108         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
3109         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
3110         spin_unlock_irqrestore(&priv->lock, flags);
3111
3112         if (rc)
3113                 return rc;
3114
3115         if ((iwl4965_queue_space(q) < q->high_mark)
3116             && priv->mac80211_registered) {
3117                 if (wait_write_ptr) {
3118                         spin_lock_irqsave(&priv->lock, flags);
3119                         txq->need_update = 1;
3120                         iwl4965_tx_queue_update_write_ptr(priv, txq);
3121                         spin_unlock_irqrestore(&priv->lock, flags);
3122                 }
3123
3124                 ieee80211_stop_queue(priv->hw, ctl->queue);
3125         }
3126
3127         return 0;
3128
3129 drop_unlock:
3130         spin_unlock_irqrestore(&priv->lock, flags);
3131 drop:
3132         return -1;
3133 }
3134
3135 static void iwl4965_set_rate(struct iwl4965_priv *priv)
3136 {
3137         const struct ieee80211_hw_mode *hw = NULL;
3138         struct ieee80211_rate *rate;
3139         int i;
3140
3141         hw = iwl4965_get_hw_mode(priv, priv->phymode);
3142         if (!hw) {
3143                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3144                 return;
3145         }
3146
3147         priv->active_rate = 0;
3148         priv->active_rate_basic = 0;
3149
3150         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3151                        hw->mode == MODE_IEEE80211A ?
3152                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3153
3154         for (i = 0; i < hw->num_rates; i++) {
3155                 rate = &(hw->rates[i]);
3156                 if ((rate->val < IWL_RATE_COUNT) &&
3157                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3158                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3159                                        rate->val, iwl4965_rates[rate->val].plcp,
3160                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3161                                        "*" : "");
3162                         priv->active_rate |= (1 << rate->val);
3163                         if (rate->flags & IEEE80211_RATE_BASIC)
3164                                 priv->active_rate_basic |= (1 << rate->val);
3165                 } else
3166                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3167                                        rate->val, iwl4965_rates[rate->val].plcp);
3168         }
3169
3170         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3171                        priv->active_rate, priv->active_rate_basic);
3172
3173         /*
3174          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3175          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3176          * OFDM
3177          */
3178         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3179                 priv->staging_rxon.cck_basic_rates =
3180                     ((priv->active_rate_basic &
3181                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3182         else
3183                 priv->staging_rxon.cck_basic_rates =
3184                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3185
3186         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3187                 priv->staging_rxon.ofdm_basic_rates =
3188                     ((priv->active_rate_basic &
3189                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3190                       IWL_FIRST_OFDM_RATE) & 0xFF;
3191         else
3192                 priv->staging_rxon.ofdm_basic_rates =
3193                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3194 }
3195
3196 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
3197 {
3198         unsigned long flags;
3199
3200         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3201                 return;
3202
3203         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3204                           disable_radio ? "OFF" : "ON");
3205
3206         if (disable_radio) {
3207                 iwl4965_scan_cancel(priv);
3208                 /* FIXME: This is a workaround for AP */
3209                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3210                         spin_lock_irqsave(&priv->lock, flags);
3211                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3212                                     CSR_UCODE_SW_BIT_RFKILL);
3213                         spin_unlock_irqrestore(&priv->lock, flags);
3214                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3215                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3216                 }
3217                 return;
3218         }
3219
3220         spin_lock_irqsave(&priv->lock, flags);
3221         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3222
3223         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3224         spin_unlock_irqrestore(&priv->lock, flags);
3225
3226         /* wake up ucode */
3227         msleep(10);
3228
3229         spin_lock_irqsave(&priv->lock, flags);
3230         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3231         if (!iwl4965_grab_nic_access(priv))
3232                 iwl4965_release_nic_access(priv);
3233         spin_unlock_irqrestore(&priv->lock, flags);
3234
3235         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3236                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3237                                   "disabled by HW switch\n");
3238                 return;
3239         }
3240
3241         queue_work(priv->workqueue, &priv->restart);
3242         return;
3243 }
3244
3245 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
3246                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3247 {
3248         u16 fc =
3249             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3250
3251         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3252                 return;
3253
3254         if (!(fc & IEEE80211_FCTL_PROTECTED))
3255                 return;
3256
3257         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3258         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3259         case RX_RES_STATUS_SEC_TYPE_TKIP:
3260                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3261                     RX_RES_STATUS_BAD_ICV_MIC)
3262                         stats->flag |= RX_FLAG_MMIC_ERROR;
3263         case RX_RES_STATUS_SEC_TYPE_WEP:
3264         case RX_RES_STATUS_SEC_TYPE_CCMP:
3265                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3266                     RX_RES_STATUS_DECRYPT_OK) {
3267                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3268                         stats->flag |= RX_FLAG_DECRYPTED;
3269                 }
3270                 break;
3271
3272         default:
3273                 break;
3274         }
3275 }
3276
3277
3278 #define IWL_PACKET_RETRY_TIME HZ
3279
3280 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
3281 {
3282         u16 sc = le16_to_cpu(header->seq_ctrl);
3283         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3284         u16 frag = sc & IEEE80211_SCTL_FRAG;
3285         u16 *last_seq, *last_frag;
3286         unsigned long *last_time;
3287
3288         switch (priv->iw_mode) {
3289         case IEEE80211_IF_TYPE_IBSS:{
3290                 struct list_head *p;
3291                 struct iwl4965_ibss_seq *entry = NULL;
3292                 u8 *mac = header->addr2;
3293                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3294
3295                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3296                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
3297                         if (!compare_ether_addr(entry->mac, mac))
3298                                 break;
3299                 }
3300                 if (p == &priv->ibss_mac_hash[index]) {
3301                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3302                         if (!entry) {
3303                                 IWL_ERROR("Cannot malloc new mac entry\n");
3304                                 return 0;
3305                         }
3306                         memcpy(entry->mac, mac, ETH_ALEN);
3307                         entry->seq_num = seq;
3308                         entry->frag_num = frag;
3309                         entry->packet_time = jiffies;
3310                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3311                         return 0;
3312                 }
3313                 last_seq = &entry->seq_num;
3314                 last_frag = &entry->frag_num;
3315                 last_time = &entry->packet_time;
3316                 break;
3317         }
3318         case IEEE80211_IF_TYPE_STA:
3319                 last_seq = &priv->last_seq_num;
3320                 last_frag = &priv->last_frag_num;
3321                 last_time = &priv->last_packet_time;
3322                 break;
3323         default:
3324                 return 0;
3325         }
3326         if ((*last_seq == seq) &&
3327             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3328                 if (*last_frag == frag)
3329                         goto drop;
3330                 if (*last_frag + 1 != frag)
3331                         /* out-of-order fragment */
3332                         goto drop;
3333         } else
3334                 *last_seq = seq;
3335
3336         *last_frag = frag;
3337         *last_time = jiffies;
3338         return 0;
3339
3340  drop:
3341         return 1;
3342 }
3343
3344 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3345
3346 #include "iwl-spectrum.h"
3347
3348 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3349 #define BEACON_TIME_MASK_HIGH   0xFF000000
3350 #define TIME_UNIT               1024
3351
3352 /*
3353  * extended beacon time format
3354  * time in usec will be changed into a 32-bit value in 8:24 format
3355  * the high 1 byte is the beacon counts
3356  * the lower 3 bytes is the time in usec within one beacon interval
3357  */
3358
3359 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3360 {
3361         u32 quot;
3362         u32 rem;
3363         u32 interval = beacon_interval * 1024;
3364
3365         if (!interval || !usec)
3366                 return 0;
3367
3368         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3369         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3370
3371         return (quot << 24) + rem;
3372 }
3373
3374 /* base is usually what we get from ucode with each received frame,
3375  * the same as HW timer counter counting down
3376  */
3377
3378 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3379 {
3380         u32 base_low = base & BEACON_TIME_MASK_LOW;
3381         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3382         u32 interval = beacon_interval * TIME_UNIT;
3383         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3384             (addon & BEACON_TIME_MASK_HIGH);
3385
3386         if (base_low > addon_low)
3387                 res += base_low - addon_low;
3388         else if (base_low < addon_low) {
3389                 res += interval + base_low - addon_low;
3390                 res += (1 << 24);
3391         } else
3392                 res += (1 << 24);
3393
3394         return cpu_to_le32(res);
3395 }
3396
3397 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3398                                struct ieee80211_measurement_params *params,
3399                                u8 type)
3400 {
3401         struct iwl4965_spectrum_cmd spectrum;
3402         struct iwl4965_rx_packet *res;
3403         struct iwl4965_host_cmd cmd = {
3404                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3405                 .data = (void *)&spectrum,
3406                 .meta.flags = CMD_WANT_SKB,
3407         };
3408         u32 add_time = le64_to_cpu(params->start_time);
3409         int rc;
3410         int spectrum_resp_status;
3411         int duration = le16_to_cpu(params->duration);
3412
3413         if (iwl4965_is_associated(priv))
3414                 add_time =
3415                     iwl4965_usecs_to_beacons(
3416                         le64_to_cpu(params->start_time) - priv->last_tsf,
3417                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3418
3419         memset(&spectrum, 0, sizeof(spectrum));
3420
3421         spectrum.channel_count = cpu_to_le16(1);
3422         spectrum.flags =
3423             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3424         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3425         cmd.len = sizeof(spectrum);
3426         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3427
3428         if (iwl4965_is_associated(priv))
3429                 spectrum.start_time =
3430                     iwl4965_add_beacon_time(priv->last_beacon_time,
3431                                 add_time,
3432                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3433         else
3434                 spectrum.start_time = 0;
3435
3436         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3437         spectrum.channels[0].channel = params->channel;
3438         spectrum.channels[0].type = type;
3439         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3440                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3441                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3442
3443         rc = iwl4965_send_cmd_sync(priv, &cmd);
3444         if (rc)
3445                 return rc;
3446
3447         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3448         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3449                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3450                 rc = -EIO;
3451         }
3452
3453         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3454         switch (spectrum_resp_status) {
3455         case 0:         /* Command will be handled */
3456                 if (res->u.spectrum.id != 0xff) {
3457                         IWL_DEBUG_INFO
3458                             ("Replaced existing measurement: %d\n",
3459                              res->u.spectrum.id);
3460                         priv->measurement_status &= ~MEASUREMENT_READY;
3461                 }
3462                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3463                 rc = 0;
3464                 break;
3465
3466         case 1:         /* Command will not be handled */
3467                 rc = -EAGAIN;
3468                 break;
3469         }
3470
3471         dev_kfree_skb_any(cmd.meta.u.skb);
3472
3473         return rc;
3474 }
3475 #endif
3476
3477 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3478                                  struct iwl4965_tx_info *tx_sta)
3479 {
3480
3481         tx_sta->status.ack_signal = 0;
3482         tx_sta->status.excessive_retries = 0;
3483         tx_sta->status.queue_length = 0;
3484         tx_sta->status.queue_number = 0;
3485
3486         if (in_interrupt())
3487                 ieee80211_tx_status_irqsafe(priv->hw,
3488                                             tx_sta->skb[0], &(tx_sta->status));
3489         else
3490                 ieee80211_tx_status(priv->hw,
3491                                     tx_sta->skb[0], &(tx_sta->status));
3492
3493         tx_sta->skb[0] = NULL;
3494 }
3495
3496 /**
3497  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3498  *
3499  * When FW advances 'R' index, all entries between old and new 'R' index
3500  * need to be reclaimed. As result, some free space forms.  If there is
3501  * enough free space (> low mark), wake the stack that feeds us.
3502  */
3503 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3504 {
3505         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3506         struct iwl4965_queue *q = &txq->q;
3507         int nfreed = 0;
3508
3509         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3510                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3511                           "is out of range [0-%d] %d %d.\n", txq_id,
3512                           index, q->n_bd, q->write_ptr, q->read_ptr);
3513                 return 0;
3514         }
3515
3516         for (index = iwl4965_queue_inc_wrap(index, q->n_bd);
3517                 q->read_ptr != index;
3518                 q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3519                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3520                         iwl4965_txstatus_to_ieee(priv,
3521                                         &(txq->txb[txq->q.read_ptr]));
3522                         iwl4965_hw_txq_free_tfd(priv, txq);
3523                 } else if (nfreed > 1) {
3524                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3525                                         q->write_ptr, q->read_ptr);
3526                         queue_work(priv->workqueue, &priv->restart);
3527                 }
3528                 nfreed++;
3529         }
3530
3531         if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3532                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3533                         priv->mac80211_registered)
3534                 ieee80211_wake_queue(priv->hw, txq_id);
3535
3536
3537         return nfreed;
3538 }
3539
3540 static int iwl4965_is_tx_success(u32 status)
3541 {
3542         status &= TX_STATUS_MSK;
3543         return (status == TX_STATUS_SUCCESS)
3544             || (status == TX_STATUS_DIRECT_DONE);
3545 }
3546
3547 /******************************************************************************
3548  *
3549  * Generic RX handler implementations
3550  *
3551  ******************************************************************************/
3552 #ifdef CONFIG_IWL4965_HT
3553 #ifdef CONFIG_IWL4965_HT_AGG
3554
3555 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3556                                     struct ieee80211_hdr *hdr)
3557 {
3558         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3559                 return IWL_AP_ID;
3560         else {
3561                 u8 *da = ieee80211_get_DA(hdr);
3562                 return iwl4965_hw_find_station(priv, da);
3563         }
3564 }
3565
3566 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3567         struct iwl4965_priv *priv, int txq_id, int idx)
3568 {
3569         if (priv->txq[txq_id].txb[idx].skb[0])
3570                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3571                                 txb[idx].skb[0]->data;
3572         return NULL;
3573 }
3574
3575 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3576 {
3577         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3578                                 tx_resp->frame_count);
3579         return le32_to_cpu(*scd_ssn) & MAX_SN;
3580
3581 }
3582
3583 /**
3584  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3585  */
3586 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3587                                       struct iwl4965_ht_agg *agg,
3588                                       struct iwl4965_tx_resp *tx_resp,
3589                                       u16 start_idx)
3590 {
3591         u32 status;
3592         __le32 *frame_status = &tx_resp->status;
3593         struct ieee80211_tx_status *tx_status = NULL;
3594         struct ieee80211_hdr *hdr = NULL;
3595         int i, sh;
3596         int txq_id, idx;
3597         u16 seq;
3598
3599         if (agg->wait_for_ba)
3600                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3601
3602         agg->frame_count = tx_resp->frame_count;
3603         agg->start_idx = start_idx;
3604         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3605         agg->bitmap0 = agg->bitmap1 = 0;
3606
3607         /* # frames attempted by Tx command */
3608         if (agg->frame_count == 1) {
3609                 /* Only one frame was attempted; no block-ack will arrive */
3610                 struct iwl4965_tx_queue *txq ;
3611                 status = le32_to_cpu(frame_status[0]);
3612
3613                 txq_id = agg->txq_id;
3614                 txq = &priv->txq[txq_id];
3615                 /* FIXME: code repetition */
3616                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3617                                    agg->frame_count, agg->start_idx);
3618
3619                 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3620                 tx_status->retry_count = tx_resp->failure_frame;
3621                 tx_status->queue_number = status & 0xff;
3622                 tx_status->queue_length = tx_resp->bt_kill_count;
3623                 tx_status->queue_length |= tx_resp->failure_rts;
3624
3625                 tx_status->flags = iwl4965_is_tx_success(status)?
3626                         IEEE80211_TX_STATUS_ACK : 0;
3627                 tx_status->control.tx_rate =
3628                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3629                 /* FIXME: code repetition end */
3630
3631                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3632                                     status & 0xff, tx_resp->failure_frame);
3633                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3634                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3635
3636                 agg->wait_for_ba = 0;
3637         } else {
3638                 /* Two or more frames were attempted; expect block-ack */
3639                 u64 bitmap = 0;
3640                 int start = agg->start_idx;
3641
3642                 /* Construct bit-map of pending frames within Tx window */
3643                 for (i = 0; i < agg->frame_count; i++) {
3644                         u16 sc;
3645                         status = le32_to_cpu(frame_status[i]);
3646                         seq  = status >> 16;
3647                         idx = SEQ_TO_INDEX(seq);
3648                         txq_id = SEQ_TO_QUEUE(seq);
3649
3650                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3651                                       AGG_TX_STATE_ABORT_MSK))
3652                                 continue;
3653
3654                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3655                                            agg->frame_count, txq_id, idx);
3656
3657                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3658
3659                         sc = le16_to_cpu(hdr->seq_ctrl);
3660                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3661                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3662                                           " idx=%d, seq_idx=%d, seq=%d\n",
3663                                           idx, SEQ_TO_SN(sc),
3664                                           hdr->seq_ctrl);
3665                                 return -1;
3666                         }
3667
3668                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3669                                            i, idx, SEQ_TO_SN(sc));
3670
3671                         sh = idx - start;
3672                         if (sh > 64) {
3673                                 sh = (start - idx) + 0xff;
3674                                 bitmap = bitmap << sh;
3675                                 sh = 0;
3676                                 start = idx;
3677                         } else if (sh < -64)
3678                                 sh  = 0xff - (start - idx);
3679                         else if (sh < 0) {
3680                                 sh = start - idx;
3681                                 start = idx;
3682                                 bitmap = bitmap << sh;
3683                                 sh = 0;
3684                         }
3685                         bitmap |= (1 << sh);
3686                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3687                                            start, (u32)(bitmap & 0xFFFFFFFF));
3688                 }
3689
3690                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3691                 agg->bitmap1 = bitmap >> 32;
3692                 agg->start_idx = start;
3693                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3694                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3695                                    agg->frame_count, agg->start_idx,
3696                                    agg->bitmap0);
3697
3698                 if (bitmap)
3699                         agg->wait_for_ba = 1;
3700         }
3701         return 0;
3702 }
3703 #endif
3704 #endif
3705
3706 /**
3707  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3708  */
3709 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3710                             struct iwl4965_rx_mem_buffer *rxb)
3711 {
3712         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3713         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3714         int txq_id = SEQ_TO_QUEUE(sequence);
3715         int index = SEQ_TO_INDEX(sequence);
3716         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3717         struct ieee80211_tx_status *tx_status;
3718         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3719         u32  status = le32_to_cpu(tx_resp->status);
3720 #ifdef CONFIG_IWL4965_HT
3721 #ifdef CONFIG_IWL4965_HT_AGG
3722         int tid, sta_id;
3723 #endif
3724 #endif
3725
3726         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3727                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3728                           "is out of range [0-%d] %d %d\n", txq_id,
3729                           index, txq->q.n_bd, txq->q.write_ptr,
3730                           txq->q.read_ptr);
3731                 return;
3732         }
3733
3734 #ifdef CONFIG_IWL4965_HT
3735 #ifdef CONFIG_IWL4965_HT_AGG
3736         if (txq->sched_retry) {
3737                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3738                 struct ieee80211_hdr *hdr =
3739                         iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3740                 struct iwl4965_ht_agg *agg = NULL;
3741                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3742
3743                 if (qc == NULL) {
3744                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3745                         return;
3746                 }
3747
3748                 tid = le16_to_cpu(*qc) & 0xf;
3749
3750                 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3751                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3752                         IWL_ERROR("Station not known for\n");
3753                         return;
3754                 }
3755
3756                 agg = &priv->stations[sta_id].tid[tid].agg;
3757
3758                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3759
3760                 if ((tx_resp->frame_count == 1) &&
3761                     !iwl4965_is_tx_success(status)) {
3762                         /* TODO: send BAR */
3763                 }
3764
3765                 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3766                         index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3767                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3768                                            "%d index %d\n", scd_ssn , index);
3769                         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3770                 }
3771         } else {
3772 #endif /* CONFIG_IWL4965_HT_AGG */
3773 #endif /* CONFIG_IWL4965_HT */
3774         tx_status = &(txq->txb[txq->q.read_ptr].status);
3775
3776         tx_status->retry_count = tx_resp->failure_frame;
3777         tx_status->queue_number = status;
3778         tx_status->queue_length = tx_resp->bt_kill_count;
3779         tx_status->queue_length |= tx_resp->failure_rts;
3780
3781         tx_status->flags =
3782             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3783
3784         tx_status->control.tx_rate =
3785                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3786
3787         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3788                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3789                      status, le32_to_cpu(tx_resp->rate_n_flags),
3790                      tx_resp->failure_frame);
3791
3792         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3793         if (index != -1)
3794                 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3795 #ifdef CONFIG_IWL4965_HT
3796 #ifdef CONFIG_IWL4965_HT_AGG
3797         }
3798 #endif /* CONFIG_IWL4965_HT_AGG */
3799 #endif /* CONFIG_IWL4965_HT */
3800
3801         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3802                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3803 }
3804
3805
3806 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3807                                struct iwl4965_rx_mem_buffer *rxb)
3808 {
3809         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3810         struct iwl4965_alive_resp *palive;
3811         struct delayed_work *pwork;
3812
3813         palive = &pkt->u.alive_frame;
3814
3815         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3816                        "0x%01X 0x%01X\n",
3817                        palive->is_valid, palive->ver_type,
3818                        palive->ver_subtype);
3819
3820         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3821                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3822                 memcpy(&priv->card_alive_init,
3823                        &pkt->u.alive_frame,
3824                        sizeof(struct iwl4965_init_alive_resp));
3825                 pwork = &priv->init_alive_start;
3826         } else {
3827                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3828                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3829                        sizeof(struct iwl4965_alive_resp));
3830                 pwork = &priv->alive_start;
3831         }
3832
3833         /* We delay the ALIVE response by 5ms to
3834          * give the HW RF Kill time to activate... */
3835         if (palive->is_valid == UCODE_VALID_OK)
3836                 queue_delayed_work(priv->workqueue, pwork,
3837                                    msecs_to_jiffies(5));
3838         else
3839                 IWL_WARNING("uCode did not respond OK.\n");
3840 }
3841
3842 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3843                                  struct iwl4965_rx_mem_buffer *rxb)
3844 {
3845         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3846
3847         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3848         return;
3849 }
3850
3851 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3852                                struct iwl4965_rx_mem_buffer *rxb)
3853 {
3854         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3855
3856         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3857                 "seq 0x%04X ser 0x%08X\n",
3858                 le32_to_cpu(pkt->u.err_resp.error_type),
3859                 get_cmd_string(pkt->u.err_resp.cmd_id),
3860                 pkt->u.err_resp.cmd_id,
3861                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3862                 le32_to_cpu(pkt->u.err_resp.error_info));
3863 }
3864
3865 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3866
3867 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3868 {
3869         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3870         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3871         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3872         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3873                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3874         rxon->channel = csa->channel;
3875         priv->staging_rxon.channel = csa->channel;
3876 }
3877
3878 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3879                                           struct iwl4965_rx_mem_buffer *rxb)
3880 {
3881 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3882         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3883         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3884
3885         if (!report->state) {
3886                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3887                           "Spectrum Measure Notification: Start\n");
3888                 return;
3889         }
3890
3891         memcpy(&priv->measure_report, report, sizeof(*report));
3892         priv->measurement_status |= MEASUREMENT_READY;
3893 #endif
3894 }
3895
3896 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3897                                   struct iwl4965_rx_mem_buffer *rxb)
3898 {
3899 #ifdef CONFIG_IWL4965_DEBUG
3900         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3901         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3902         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3903                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3904 #endif
3905 }
3906
3907 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3908                                              struct iwl4965_rx_mem_buffer *rxb)
3909 {
3910         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3911         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3912                         "notification for %s:\n",
3913                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3914         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3915 }
3916
3917 static void iwl4965_bg_beacon_update(struct work_struct *work)
3918 {
3919         struct iwl4965_priv *priv =
3920                 container_of(work, struct iwl4965_priv, beacon_update);
3921         struct sk_buff *beacon;
3922
3923         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3924         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3925
3926         if (!beacon) {
3927                 IWL_ERROR("update beacon failed\n");
3928                 return;
3929         }
3930
3931         mutex_lock(&priv->mutex);
3932         /* new beacon skb is allocated every time; dispose previous.*/
3933         if (priv->ibss_beacon)
3934                 dev_kfree_skb(priv->ibss_beacon);
3935
3936         priv->ibss_beacon = beacon;
3937         mutex_unlock(&priv->mutex);
3938
3939         iwl4965_send_beacon_cmd(priv);
3940 }
3941
3942 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3943                                 struct iwl4965_rx_mem_buffer *rxb)
3944 {
3945 #ifdef CONFIG_IWL4965_DEBUG
3946         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3947         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3948         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3949
3950         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3951                 "tsf %d %d rate %d\n",
3952                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3953                 beacon->beacon_notify_hdr.failure_frame,
3954                 le32_to_cpu(beacon->ibss_mgr_status),
3955                 le32_to_cpu(beacon->high_tsf),
3956                 le32_to_cpu(beacon->low_tsf), rate);
3957 #endif
3958
3959         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3960             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3961                 queue_work(priv->workqueue, &priv->beacon_update);
3962 }
3963
3964 /* Service response to REPLY_SCAN_CMD (0x80) */
3965 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3966                               struct iwl4965_rx_mem_buffer *rxb)
3967 {
3968 #ifdef CONFIG_IWL4965_DEBUG
3969         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3970         struct iwl4965_scanreq_notification *notif =
3971             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3972
3973         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3974 #endif
3975 }
3976
3977 /* Service SCAN_START_NOTIFICATION (0x82) */
3978 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3979                                     struct iwl4965_rx_mem_buffer *rxb)
3980 {
3981         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3982         struct iwl4965_scanstart_notification *notif =
3983             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3984         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3985         IWL_DEBUG_SCAN("Scan start: "
3986                        "%d [802.11%s] "
3987                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3988                        notif->channel,
3989                        notif->band ? "bg" : "a",
3990                        notif->tsf_high,
3991                        notif->tsf_low, notif->status, notif->beacon_timer);
3992 }
3993
3994 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3995 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3996                                       struct iwl4965_rx_mem_buffer *rxb)
3997 {
3998         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3999         struct iwl4965_scanresults_notification *notif =
4000             (struct iwl4965_scanresults_notification *)pkt->u.raw;
4001
4002         IWL_DEBUG_SCAN("Scan ch.res: "
4003                        "%d [802.11%s] "
4004                        "(TSF: 0x%08X:%08X) - %d "
4005                        "elapsed=%lu usec (%dms since last)\n",
4006                        notif->channel,
4007                        notif->band ? "bg" : "a",
4008                        le32_to_cpu(notif->tsf_high),
4009                        le32_to_cpu(notif->tsf_low),
4010                        le32_to_cpu(notif->statistics[0]),
4011                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
4012                        jiffies_to_msecs(elapsed_jiffies
4013                                         (priv->last_scan_jiffies, jiffies)));
4014
4015         priv->last_scan_jiffies = jiffies;
4016         priv->next_scan_jiffies = 0;
4017 }
4018
4019 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
4020 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
4021                                        struct iwl4965_rx_mem_buffer *rxb)
4022 {
4023         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4024         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
4025
4026         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
4027                        scan_notif->scanned_channels,
4028                        scan_notif->tsf_low,
4029                        scan_notif->tsf_high, scan_notif->status);
4030
4031         /* The HW is no longer scanning */
4032         clear_bit(STATUS_SCAN_HW, &priv->status);
4033
4034         /* The scan completion notification came in, so kill that timer... */
4035         cancel_delayed_work(&priv->scan_check);
4036
4037         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
4038                        (priv->scan_bands == 2) ? "2.4" : "5.2",
4039                        jiffies_to_msecs(elapsed_jiffies
4040                                         (priv->scan_pass_start, jiffies)));
4041
4042         /* Remove this scanned band from the list
4043          * of pending bands to scan */
4044         priv->scan_bands--;
4045
4046         /* If a request to abort was given, or the scan did not succeed
4047          * then we reset the scan state machine and terminate,
4048          * re-queuing another scan if one has been requested */
4049         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4050                 IWL_DEBUG_INFO("Aborted scan completed.\n");
4051                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
4052         } else {
4053                 /* If there are more bands on this scan pass reschedule */
4054                 if (priv->scan_bands > 0)
4055                         goto reschedule;
4056         }
4057
4058         priv->last_scan_jiffies = jiffies;
4059         priv->next_scan_jiffies = 0;
4060         IWL_DEBUG_INFO("Setting scan to off\n");
4061
4062         clear_bit(STATUS_SCANNING, &priv->status);
4063
4064         IWL_DEBUG_INFO("Scan took %dms\n",
4065                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4066
4067         queue_work(priv->workqueue, &priv->scan_completed);
4068
4069         return;
4070
4071 reschedule:
4072         priv->scan_pass_start = jiffies;
4073         queue_work(priv->workqueue, &priv->request_scan);
4074 }
4075
4076 /* Handle notification from uCode that card's power state is changing
4077  * due to software, hardware, or critical temperature RFKILL */
4078 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
4079                                     struct iwl4965_rx_mem_buffer *rxb)
4080 {
4081         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4082         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4083         unsigned long status = priv->status;
4084
4085         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4086                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4087                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4088
4089         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4090                      RF_CARD_DISABLED)) {
4091
4092                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4093                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4094
4095                 if (!iwl4965_grab_nic_access(priv)) {
4096                         iwl4965_write_direct32(
4097                                 priv, HBUS_TARG_MBX_C,
4098                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4099
4100                         iwl4965_release_nic_access(priv);
4101                 }
4102
4103                 if (!(flags & RXON_CARD_DISABLED)) {
4104                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4105                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4106                         if (!iwl4965_grab_nic_access(priv)) {
4107                                 iwl4965_write_direct32(
4108                                         priv, HBUS_TARG_MBX_C,
4109                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4110
4111                                 iwl4965_release_nic_access(priv);
4112                         }
4113                 }
4114
4115                 if (flags & RF_CARD_DISABLED) {
4116                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4117                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4118                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4119                         if (!iwl4965_grab_nic_access(priv))
4120                                 iwl4965_release_nic_access(priv);
4121                 }
4122         }
4123
4124         if (flags & HW_CARD_DISABLED)
4125                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4126         else
4127                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4128
4129
4130         if (flags & SW_CARD_DISABLED)
4131                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4132         else
4133                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4134
4135         if (!(flags & RXON_CARD_DISABLED))
4136                 iwl4965_scan_cancel(priv);
4137
4138         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4139              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4140             (test_bit(STATUS_RF_KILL_SW, &status) !=
4141              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4142                 queue_work(priv->workqueue, &priv->rf_kill);
4143         else
4144                 wake_up_interruptible(&priv->wait_command_queue);
4145 }
4146
4147 /**
4148  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
4149  *
4150  * Setup the RX handlers for each of the reply types sent from the uCode
4151  * to the host.
4152  *
4153  * This function chains into the hardware specific files for them to setup
4154  * any hardware specific handlers as well.
4155  */
4156 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
4157 {
4158         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
4159         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
4160         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
4161         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
4162         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4163             iwl4965_rx_spectrum_measure_notif;
4164         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
4165         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4166             iwl4965_rx_pm_debug_statistics_notif;
4167         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
4168
4169         /*
4170          * The same handler is used for both the REPLY to a discrete
4171          * statistics request from the host as well as for the periodic
4172          * statistics notifications (after received beacons) from the uCode.
4173          */
4174         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
4175         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
4176
4177         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
4178         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
4179         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4180             iwl4965_rx_scan_results_notif;
4181         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4182             iwl4965_rx_scan_complete_notif;
4183         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
4184         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
4185
4186         /* Set up hardware specific Rx handlers */
4187         iwl4965_hw_rx_handler_setup(priv);
4188 }
4189
4190 /**
4191  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4192  * @rxb: Rx buffer to reclaim
4193  *
4194  * If an Rx buffer has an async callback associated with it the callback
4195  * will be executed.  The attached skb (if present) will only be freed
4196  * if the callback returns 1
4197  */
4198 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
4199                                 struct iwl4965_rx_mem_buffer *rxb)
4200 {
4201         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4202         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4203         int txq_id = SEQ_TO_QUEUE(sequence);
4204         int index = SEQ_TO_INDEX(sequence);
4205         int huge = sequence & SEQ_HUGE_FRAME;
4206         int cmd_index;
4207         struct iwl4965_cmd *cmd;
4208
4209         /* If a Tx command is being handled and it isn't in the actual
4210          * command queue then there a command routing bug has been introduced
4211          * in the queue management code. */
4212         if (txq_id != IWL_CMD_QUEUE_NUM)
4213                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4214                           txq_id, pkt->hdr.cmd);
4215         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4216
4217         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4218         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4219
4220         /* Input error checking is done when commands are added to queue. */
4221         if (cmd->meta.flags & CMD_WANT_SKB) {
4222                 cmd->meta.source->u.skb = rxb->skb;
4223                 rxb->skb = NULL;
4224         } else if (cmd->meta.u.callback &&
4225                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4226                 rxb->skb = NULL;
4227
4228         iwl4965_tx_queue_reclaim(priv, txq_id, index);
4229
4230         if (!(cmd->meta.flags & CMD_ASYNC)) {
4231                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4232                 wake_up_interruptible(&priv->wait_command_queue);
4233         }
4234 }
4235
4236 /************************** RX-FUNCTIONS ****************************/
4237 /*
4238  * Rx theory of operation
4239  *
4240  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
4241  * each of which point to Receive Buffers to be filled by 4965.  These get
4242  * used not only for Rx frames, but for any command response or notification
4243  * from the 4965.  The driver and 4965 manage the Rx buffers by means
4244  * of indexes into the circular buffer.
4245  *
4246  * Rx Queue Indexes
4247  * The host/firmware share two index registers for managing the Rx buffers.
4248  *
4249  * The READ index maps to the first position that the firmware may be writing
4250  * to -- the driver can read up to (but not including) this position and get
4251  * good data.
4252  * The READ index is managed by the firmware once the card is enabled.
4253  *
4254  * The WRITE index maps to the last position the driver has read from -- the
4255  * position preceding WRITE is the last slot the firmware can place a packet.
4256  *
4257  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4258  * WRITE = READ.
4259  *
4260  * During initialization, the host sets up the READ queue position to the first
4261  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4262  *
4263  * When the firmware places a packet in a buffer, it will advance the READ index
4264  * and fire the RX interrupt.  The driver can then query the READ index and
4265  * process as many packets as possible, moving the WRITE index forward as it
4266  * resets the Rx queue buffers with new memory.
4267  *
4268  * The management in the driver is as follows:
4269  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4270  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4271  *   to replenish the iwl->rxq->rx_free.
4272  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
4273  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4274  *   'processed' and 'read' driver indexes as well)
4275  * + A received packet is processed and handed to the kernel network stack,
4276  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4277  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4278  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4279  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4280  *   were enough free buffers and RX_STALLED is set it is cleared.
4281  *
4282  *
4283  * Driver sequence:
4284  *
4285  * iwl4965_rx_queue_alloc()   Allocates rx_free
4286  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
4287  *                            iwl4965_rx_queue_restock
4288  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
4289  *                            queue, updates firmware pointers, and updates
4290  *                            the WRITE index.  If insufficient rx_free buffers
4291  *                            are available, schedules iwl4965_rx_replenish
4292  *
4293  * -- enable interrupts --
4294  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
4295  *                            READ INDEX, detaching the SKB from the pool.
4296  *                            Moves the packet buffer from queue to rx_used.
4297  *                            Calls iwl4965_rx_queue_restock to refill any empty
4298  *                            slots.
4299  * ...
4300  *
4301  */
4302
4303 /**
4304  * iwl4965_rx_queue_space - Return number of free slots available in queue.
4305  */
4306 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4307 {
4308         int s = q->read - q->write;
4309         if (s <= 0)
4310                 s += RX_QUEUE_SIZE;
4311         /* keep some buffer to not confuse full and empty queue */
4312         s -= 2;
4313         if (s < 0)
4314                 s = 0;
4315         return s;
4316 }
4317
4318 /**
4319  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4320  */
4321 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4322 {
4323         u32 reg = 0;
4324         int rc = 0;
4325         unsigned long flags;
4326
4327         spin_lock_irqsave(&q->lock, flags);
4328
4329         if (q->need_update == 0)
4330                 goto exit_unlock;
4331
4332         /* If power-saving is in use, make sure device is awake */
4333         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4334                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4335
4336                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4337                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4338                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4339                         goto exit_unlock;
4340                 }
4341
4342                 rc = iwl4965_grab_nic_access(priv);
4343                 if (rc)
4344                         goto exit_unlock;
4345
4346                 /* Device expects a multiple of 8 */
4347                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4348                                      q->write & ~0x7);
4349                 iwl4965_release_nic_access(priv);
4350
4351         /* Else device is assumed to be awake */
4352         } else
4353                 /* Device expects a multiple of 8 */
4354                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4355
4356
4357         q->need_update = 0;
4358
4359  exit_unlock:
4360         spin_unlock_irqrestore(&q->lock, flags);
4361         return rc;
4362 }
4363
4364 /**
4365  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4366  */
4367 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4368                                           dma_addr_t dma_addr)
4369 {
4370         return cpu_to_le32((u32)(dma_addr >> 8));
4371 }
4372
4373
4374 /**
4375  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4376  *
4377  * If there are slots in the RX queue that need to be restocked,
4378  * and we have free pre-allocated buffers, fill the ranks as much
4379  * as we can, pulling from rx_free.
4380  *
4381  * This moves the 'write' index forward to catch up with 'processed', and
4382  * also updates the memory address in the firmware to reference the new
4383  * target buffer.
4384  */
4385 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4386 {
4387         struct iwl4965_rx_queue *rxq = &priv->rxq;
4388         struct list_head *element;
4389         struct iwl4965_rx_mem_buffer *rxb;
4390         unsigned long flags;
4391         int write, rc;
4392
4393         spin_lock_irqsave(&rxq->lock, flags);
4394         write = rxq->write & ~0x7;
4395         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4396                 /* Get next free Rx buffer, remove from free list */
4397                 element = rxq->rx_free.next;
4398                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4399                 list_del(element);
4400
4401                 /* Point to Rx buffer via next RBD in circular buffer */
4402                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4403                 rxq->queue[rxq->write] = rxb;
4404                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4405                 rxq->free_count--;
4406         }
4407         spin_unlock_irqrestore(&rxq->lock, flags);
4408         /* If the pre-allocated buffer pool is dropping low, schedule to
4409          * refill it */
4410         if (rxq->free_count <= RX_LOW_WATERMARK)
4411                 queue_work(priv->workqueue, &priv->rx_replenish);
4412
4413
4414         /* If we've added more space for the firmware to place data, tell it.
4415          * Increment device's write pointer in multiples of 8. */
4416         if ((write != (rxq->write & ~0x7))
4417             || (abs(rxq->write - rxq->read) > 7)) {
4418                 spin_lock_irqsave(&rxq->lock, flags);
4419                 rxq->need_update = 1;
4420                 spin_unlock_irqrestore(&rxq->lock, flags);
4421                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4422                 if (rc)
4423                         return rc;
4424         }
4425
4426         return 0;
4427 }
4428
4429 /**
4430  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4431  *
4432  * When moving to rx_free an SKB is allocated for the slot.
4433  *
4434  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4435  * This is called as a scheduled work item (except for during initialization)
4436  */
4437 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4438 {
4439         struct iwl4965_rx_queue *rxq = &priv->rxq;
4440         struct list_head *element;
4441         struct iwl4965_rx_mem_buffer *rxb;
4442         unsigned long flags;
4443         spin_lock_irqsave(&rxq->lock, flags);
4444         while (!list_empty(&rxq->rx_used)) {
4445                 element = rxq->rx_used.next;
4446                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4447
4448                 /* Alloc a new receive buffer */
4449                 rxb->skb =
4450                     alloc_skb(priv->hw_setting.rx_buf_size,
4451                                 __GFP_NOWARN | GFP_ATOMIC);
4452                 if (!rxb->skb) {
4453                         if (net_ratelimit())
4454                                 printk(KERN_CRIT DRV_NAME
4455                                        ": Can not allocate SKB buffers\n");
4456                         /* We don't reschedule replenish work here -- we will
4457                          * call the restock method and if it still needs
4458                          * more buffers it will schedule replenish */
4459                         break;
4460                 }
4461                 priv->alloc_rxb_skb++;
4462                 list_del(element);
4463
4464                 /* Get physical address of RB/SKB */
4465                 rxb->dma_addr =
4466                     pci_map_single(priv->pci_dev, rxb->skb->data,
4467                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4468                 list_add_tail(&rxb->list, &rxq->rx_free);
4469                 rxq->free_count++;
4470         }
4471         spin_unlock_irqrestore(&rxq->lock, flags);
4472 }
4473
4474 /*
4475  * this should be called while priv->lock is locked
4476 */
4477 static void __iwl4965_rx_replenish(void *data)
4478 {
4479         struct iwl4965_priv *priv = data;
4480
4481         iwl4965_rx_allocate(priv);
4482         iwl4965_rx_queue_restock(priv);
4483 }
4484
4485
4486 void iwl4965_rx_replenish(void *data)
4487 {
4488         struct iwl4965_priv *priv = data;
4489         unsigned long flags;
4490
4491         iwl4965_rx_allocate(priv);
4492
4493         spin_lock_irqsave(&priv->lock, flags);
4494         iwl4965_rx_queue_restock(priv);
4495         spin_unlock_irqrestore(&priv->lock, flags);
4496 }
4497
4498 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4499  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4500  * This free routine walks the list of POOL entries and if SKB is set to
4501  * non NULL it is unmapped and freed
4502  */
4503 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4504 {
4505         int i;
4506         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4507                 if (rxq->pool[i].skb != NULL) {
4508                         pci_unmap_single(priv->pci_dev,
4509                                          rxq->pool[i].dma_addr,
4510                                          priv->hw_setting.rx_buf_size,
4511                                          PCI_DMA_FROMDEVICE);
4512                         dev_kfree_skb(rxq->pool[i].skb);
4513                 }
4514         }
4515
4516         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4517                             rxq->dma_addr);
4518         rxq->bd = NULL;
4519 }
4520
4521 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4522 {
4523         struct iwl4965_rx_queue *rxq = &priv->rxq;
4524         struct pci_dev *dev = priv->pci_dev;
4525         int i;
4526
4527         spin_lock_init(&rxq->lock);
4528         INIT_LIST_HEAD(&rxq->rx_free);
4529         INIT_LIST_HEAD(&rxq->rx_used);
4530
4531         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4532         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4533         if (!rxq->bd)
4534                 return -ENOMEM;
4535
4536         /* Fill the rx_used queue with _all_ of the Rx buffers */
4537         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4538                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4539
4540         /* Set us so that we have processed and used all buffers, but have
4541          * not restocked the Rx queue with fresh buffers */
4542         rxq->read = rxq->write = 0;
4543         rxq->free_count = 0;
4544         rxq->need_update = 0;
4545         return 0;
4546 }
4547
4548 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4549 {
4550         unsigned long flags;
4551         int i;
4552         spin_lock_irqsave(&rxq->lock, flags);
4553         INIT_LIST_HEAD(&rxq->rx_free);
4554         INIT_LIST_HEAD(&rxq->rx_used);
4555         /* Fill the rx_used queue with _all_ of the Rx buffers */
4556         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4557                 /* In the reset function, these buffers may have been allocated
4558                  * to an SKB, so we need to unmap and free potential storage */
4559                 if (rxq->pool[i].skb != NULL) {
4560                         pci_unmap_single(priv->pci_dev,
4561                                          rxq->pool[i].dma_addr,
4562                                          priv->hw_setting.rx_buf_size,
4563                                          PCI_DMA_FROMDEVICE);
4564                         priv->alloc_rxb_skb--;
4565                         dev_kfree_skb(rxq->pool[i].skb);
4566                         rxq->pool[i].skb = NULL;
4567                 }
4568                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4569         }
4570
4571         /* Set us so that we have processed and used all buffers, but have
4572          * not restocked the Rx queue with fresh buffers */
4573         rxq->read = rxq->write = 0;
4574         rxq->free_count = 0;
4575         spin_unlock_irqrestore(&rxq->lock, flags);
4576 }
4577
4578 /* Convert linear signal-to-noise ratio into dB */
4579 static u8 ratio2dB[100] = {
4580 /*       0   1   2   3   4   5   6   7   8   9 */
4581          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4582         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4583         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4584         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4585         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4586         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4587         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4588         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4589         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4590         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4591 };
4592
4593 /* Calculates a relative dB value from a ratio of linear
4594  *   (i.e. not dB) signal levels.
4595  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4596 int iwl4965_calc_db_from_ratio(int sig_ratio)
4597 {
4598         /* 1000:1 or higher just report as 60 dB */
4599         if (sig_ratio >= 1000)
4600                 return 60;
4601
4602         /* 100:1 or higher, divide by 10 and use table,
4603          *   add 20 dB to make up for divide by 10 */
4604         if (sig_ratio >= 100)
4605                 return (20 + (int)ratio2dB[sig_ratio/10]);
4606
4607         /* We shouldn't see this */
4608         if (sig_ratio < 1)
4609                 return 0;
4610
4611         /* Use table for ratios 1:1 - 99:1 */
4612         return (int)ratio2dB[sig_ratio];
4613 }
4614
4615 #define PERFECT_RSSI (-20) /* dBm */
4616 #define WORST_RSSI (-95)   /* dBm */
4617 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4618
4619 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4620  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4621  *   about formulas used below. */
4622 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4623 {
4624         int sig_qual;
4625         int degradation = PERFECT_RSSI - rssi_dbm;
4626
4627         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4628          * as indicator; formula is (signal dbm - noise dbm).
4629          * SNR at or above 40 is a great signal (100%).
4630          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4631          * Weakest usable signal is usually 10 - 15 dB SNR. */
4632         if (noise_dbm) {
4633                 if (rssi_dbm - noise_dbm >= 40)
4634                         return 100;
4635                 else if (rssi_dbm < noise_dbm)
4636                         return 0;
4637                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4638
4639         /* Else use just the signal level.
4640          * This formula is a least squares fit of data points collected and
4641          *   compared with a reference system that had a percentage (%) display
4642          *   for signal quality. */
4643         } else
4644                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4645                             (15 * RSSI_RANGE + 62 * degradation)) /
4646                            (RSSI_RANGE * RSSI_RANGE);
4647
4648         if (sig_qual > 100)
4649                 sig_qual = 100;
4650         else if (sig_qual < 1)
4651                 sig_qual = 0;
4652
4653         return sig_qual;
4654 }
4655
4656 /**
4657  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4658  *
4659  * Uses the priv->rx_handlers callback function array to invoke
4660  * the appropriate handlers, including command responses,
4661  * frame-received notifications, and other notifications.
4662  */
4663 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4664 {
4665         struct iwl4965_rx_mem_buffer *rxb;
4666         struct iwl4965_rx_packet *pkt;
4667         struct iwl4965_rx_queue *rxq = &priv->rxq;
4668         u32 r, i;
4669         int reclaim;
4670         unsigned long flags;
4671         u8 fill_rx = 0;
4672         u32 count = 8;
4673
4674         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4675          * buffer that the driver may process (last buffer filled by ucode). */
4676         r = iwl4965_hw_get_rx_read(priv);
4677         i = rxq->read;
4678
4679         /* Rx interrupt, but nothing sent from uCode */
4680         if (i == r)
4681                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4682
4683         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4684                 fill_rx = 1;
4685
4686         while (i != r) {
4687                 rxb = rxq->queue[i];
4688
4689                 /* If an RXB doesn't have a Rx queue slot associated with it,
4690                  * then a bug has been introduced in the queue refilling
4691                  * routines -- catch it here */
4692                 BUG_ON(rxb == NULL);
4693
4694                 rxq->queue[i] = NULL;
4695
4696                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4697                                             priv->hw_setting.rx_buf_size,
4698                                             PCI_DMA_FROMDEVICE);
4699                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4700
4701                 /* Reclaim a command buffer only if this packet is a response
4702                  *   to a (driver-originated) command.
4703                  * If the packet (e.g. Rx frame) originated from uCode,
4704                  *   there is no command buffer to reclaim.
4705                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4706                  *   but apparently a few don't get set; catch them here. */
4707                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4708                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4709                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4710                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4711                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4712                         (pkt->hdr.cmd != REPLY_TX);
4713
4714                 /* Based on type of command response or notification,
4715                  *   handle those that need handling via function in
4716                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4717                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4718                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4719                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4720                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4721                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4722                 } else {
4723                         /* No handling needed */
4724                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4725                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4726                                 r, i, get_cmd_string(pkt->hdr.cmd),
4727                                 pkt->hdr.cmd);
4728                 }
4729
4730                 if (reclaim) {
4731                         /* Invoke any callbacks, transfer the skb to caller, and
4732                          * fire off the (possibly) blocking iwl4965_send_cmd()
4733                          * as we reclaim the driver command queue */
4734                         if (rxb && rxb->skb)
4735                                 iwl4965_tx_cmd_complete(priv, rxb);
4736                         else
4737                                 IWL_WARNING("Claim null rxb?\n");
4738                 }
4739
4740                 /* For now we just don't re-use anything.  We can tweak this
4741                  * later to try and re-use notification packets and SKBs that
4742                  * fail to Rx correctly */
4743                 if (rxb->skb != NULL) {
4744                         priv->alloc_rxb_skb--;
4745                         dev_kfree_skb_any(rxb->skb);
4746                         rxb->skb = NULL;
4747                 }
4748
4749                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4750                                  priv->hw_setting.rx_buf_size,
4751                                  PCI_DMA_FROMDEVICE);
4752                 spin_lock_irqsave(&rxq->lock, flags);
4753                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4754                 spin_unlock_irqrestore(&rxq->lock, flags);
4755                 i = (i + 1) & RX_QUEUE_MASK;
4756                 /* If there are a lot of unused frames,
4757                  * restock the Rx queue so ucode wont assert. */
4758                 if (fill_rx) {
4759                         count++;
4760                         if (count >= 8) {
4761                                 priv->rxq.read = i;
4762                                 __iwl4965_rx_replenish(priv);
4763                                 count = 0;
4764                         }
4765                 }
4766         }
4767
4768         /* Backtrack one entry */
4769         priv->rxq.read = i;
4770         iwl4965_rx_queue_restock(priv);
4771 }
4772
4773 /**
4774  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4775  */
4776 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4777                                   struct iwl4965_tx_queue *txq)
4778 {
4779         u32 reg = 0;
4780         int rc = 0;
4781         int txq_id = txq->q.id;
4782
4783         if (txq->need_update == 0)
4784                 return rc;
4785
4786         /* if we're trying to save power */
4787         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4788                 /* wake up nic if it's powered down ...
4789                  * uCode will wake up, and interrupt us again, so next
4790                  * time we'll skip this part. */
4791                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4792
4793                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4794                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4795                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4796                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4797                         return rc;
4798                 }
4799
4800                 /* restore this queue's parameters in nic hardware. */
4801                 rc = iwl4965_grab_nic_access(priv);
4802                 if (rc)
4803                         return rc;
4804                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4805                                      txq->q.write_ptr | (txq_id << 8));
4806                 iwl4965_release_nic_access(priv);
4807
4808         /* else not in power-save mode, uCode will never sleep when we're
4809          * trying to tx (during RFKILL, we're not trying to tx). */
4810         } else
4811                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4812                             txq->q.write_ptr | (txq_id << 8));
4813
4814         txq->need_update = 0;
4815
4816         return rc;
4817 }
4818
4819 #ifdef CONFIG_IWL4965_DEBUG
4820 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4821 {
4822         DECLARE_MAC_BUF(mac);
4823
4824         IWL_DEBUG_RADIO("RX CONFIG:\n");
4825         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4826         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4827         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4828         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4829                         le32_to_cpu(rxon->filter_flags));
4830         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4831         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4832                         rxon->ofdm_basic_rates);
4833         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4834         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4835                         print_mac(mac, rxon->node_addr));
4836         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4837                         print_mac(mac, rxon->bssid_addr));
4838         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4839 }
4840 #endif
4841
4842 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4843 {
4844         IWL_DEBUG_ISR("Enabling interrupts\n");
4845         set_bit(STATUS_INT_ENABLED, &priv->status);
4846         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4847 }
4848
4849 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4850 {
4851         clear_bit(STATUS_INT_ENABLED, &priv->status);
4852
4853         /* disable interrupts from uCode/NIC to host */
4854         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4855
4856         /* acknowledge/clear/reset any interrupts still pending
4857          * from uCode or flow handler (Rx/Tx DMA) */
4858         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4859         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4860         IWL_DEBUG_ISR("Disabled interrupts\n");
4861 }
4862
4863 static const char *desc_lookup(int i)
4864 {
4865         switch (i) {
4866         case 1:
4867                 return "FAIL";
4868         case 2:
4869                 return "BAD_PARAM";
4870         case 3:
4871                 return "BAD_CHECKSUM";
4872         case 4:
4873                 return "NMI_INTERRUPT";
4874         case 5:
4875                 return "SYSASSERT";
4876         case 6:
4877                 return "FATAL_ERROR";
4878         }
4879
4880         return "UNKNOWN";
4881 }
4882
4883 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4884 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4885
4886 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4887 {
4888         u32 data2, line;
4889         u32 desc, time, count, base, data1;
4890         u32 blink1, blink2, ilink1, ilink2;
4891         int rc;
4892
4893         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4894
4895         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4896                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4897                 return;
4898         }
4899
4900         rc = iwl4965_grab_nic_access(priv);
4901         if (rc) {
4902                 IWL_WARNING("Can not read from adapter at this time.\n");
4903                 return;
4904         }
4905
4906         count = iwl4965_read_targ_mem(priv, base);
4907
4908         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4909                 IWL_ERROR("Start IWL Error Log Dump:\n");
4910                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4911                           priv->status, priv->config, count);
4912         }
4913
4914         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4915         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4916         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4917         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4918         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4919         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4920         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4921         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4922         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4923
4924         IWL_ERROR("Desc               Time       "
4925                   "data1      data2      line\n");
4926         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4927                   desc_lookup(desc), desc, time, data1, data2, line);
4928         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4929         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4930                   ilink1, ilink2);
4931
4932         iwl4965_release_nic_access(priv);
4933 }
4934
4935 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4936
4937 /**
4938  * iwl4965_print_event_log - Dump error event log to syslog
4939  *
4940  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4941  */
4942 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4943                                 u32 num_events, u32 mode)
4944 {
4945         u32 i;
4946         u32 base;       /* SRAM byte address of event log header */
4947         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4948         u32 ptr;        /* SRAM byte address of log data */
4949         u32 ev, time, data; /* event log data */
4950
4951         if (num_events == 0)
4952                 return;
4953
4954         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4955
4956         if (mode == 0)
4957                 event_size = 2 * sizeof(u32);
4958         else
4959                 event_size = 3 * sizeof(u32);
4960
4961         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4962
4963         /* "time" is actually "data" for mode 0 (no timestamp).
4964          * place event id # at far right for easier visual parsing. */
4965         for (i = 0; i < num_events; i++) {
4966                 ev = iwl4965_read_targ_mem(priv, ptr);
4967                 ptr += sizeof(u32);
4968                 time = iwl4965_read_targ_mem(priv, ptr);
4969                 ptr += sizeof(u32);
4970                 if (mode == 0)
4971                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4972                 else {
4973                         data = iwl4965_read_targ_mem(priv, ptr);
4974                         ptr += sizeof(u32);
4975                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4976                 }
4977         }
4978 }
4979
4980 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4981 {
4982         int rc;
4983         u32 base;       /* SRAM byte address of event log header */
4984         u32 capacity;   /* event log capacity in # entries */
4985         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4986         u32 num_wraps;  /* # times uCode wrapped to top of log */
4987         u32 next_entry; /* index of next entry to be written by uCode */
4988         u32 size;       /* # entries that we'll print */
4989
4990         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4991         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4992                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4993                 return;
4994         }
4995
4996         rc = iwl4965_grab_nic_access(priv);
4997         if (rc) {
4998                 IWL_WARNING("Can not read from adapter at this time.\n");
4999                 return;
5000         }
5001
5002         /* event log header */
5003         capacity = iwl4965_read_targ_mem(priv, base);
5004         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
5005         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
5006         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
5007
5008         size = num_wraps ? capacity : next_entry;
5009
5010         /* bail out if nothing in log */
5011         if (size == 0) {
5012                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
5013                 iwl4965_release_nic_access(priv);
5014                 return;
5015         }
5016
5017         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
5018                   size, num_wraps);
5019
5020         /* if uCode has wrapped back to top of log, start at the oldest entry,
5021          * i.e the next one that uCode would fill. */
5022         if (num_wraps)
5023                 iwl4965_print_event_log(priv, next_entry,
5024                                     capacity - next_entry, mode);
5025
5026         /* (then/else) start at top of log */
5027         iwl4965_print_event_log(priv, 0, next_entry, mode);
5028
5029         iwl4965_release_nic_access(priv);
5030 }
5031
5032 /**
5033  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
5034  */
5035 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
5036 {
5037         /* Set the FW error flag -- cleared on iwl4965_down */
5038         set_bit(STATUS_FW_ERROR, &priv->status);
5039
5040         /* Cancel currently queued command. */
5041         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
5042
5043 #ifdef CONFIG_IWL4965_DEBUG
5044         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
5045                 iwl4965_dump_nic_error_log(priv);
5046                 iwl4965_dump_nic_event_log(priv);
5047                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
5048         }
5049 #endif
5050
5051         wake_up_interruptible(&priv->wait_command_queue);
5052
5053         /* Keep the restart process from trying to send host
5054          * commands by clearing the INIT status bit */
5055         clear_bit(STATUS_READY, &priv->status);
5056
5057         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5058                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
5059                           "Restarting adapter due to uCode error.\n");
5060
5061                 if (iwl4965_is_associated(priv)) {
5062                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
5063                                sizeof(priv->recovery_rxon));
5064                         priv->error_recovering = 1;
5065                 }
5066                 queue_work(priv->workqueue, &priv->restart);
5067         }
5068 }
5069
5070 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
5071 {
5072         unsigned long flags;
5073
5074         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
5075                sizeof(priv->staging_rxon));
5076         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5077         iwl4965_commit_rxon(priv);
5078
5079         iwl4965_rxon_add_station(priv, priv->bssid, 1);
5080
5081         spin_lock_irqsave(&priv->lock, flags);
5082         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
5083         priv->error_recovering = 0;
5084         spin_unlock_irqrestore(&priv->lock, flags);
5085 }
5086
5087 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
5088 {
5089         u32 inta, handled = 0;
5090         u32 inta_fh;
5091         unsigned long flags;
5092 #ifdef CONFIG_IWL4965_DEBUG
5093         u32 inta_mask;
5094 #endif
5095
5096         spin_lock_irqsave(&priv->lock, flags);
5097
5098         /* Ack/clear/reset pending uCode interrupts.
5099          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
5100          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
5101         inta = iwl4965_read32(priv, CSR_INT);
5102         iwl4965_write32(priv, CSR_INT, inta);
5103
5104         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
5105          * Any new interrupts that happen after this, either while we're
5106          * in this tasklet, or later, will show up in next ISR/tasklet. */
5107         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5108         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5109
5110 #ifdef CONFIG_IWL4965_DEBUG
5111         if (iwl4965_debug_level & IWL_DL_ISR) {
5112                 /* just for debug */
5113                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5114                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5115                               inta, inta_mask, inta_fh);
5116         }
5117 #endif
5118
5119         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5120          * atomic, make sure that inta covers all the interrupts that
5121          * we've discovered, even if FH interrupt came in just after
5122          * reading CSR_INT. */
5123         if (inta_fh & CSR_FH_INT_RX_MASK)
5124                 inta |= CSR_INT_BIT_FH_RX;
5125         if (inta_fh & CSR_FH_INT_TX_MASK)
5126                 inta |= CSR_INT_BIT_FH_TX;
5127
5128         /* Now service all interrupt bits discovered above. */
5129         if (inta & CSR_INT_BIT_HW_ERR) {
5130                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5131
5132                 /* Tell the device to stop sending interrupts */
5133                 iwl4965_disable_interrupts(priv);
5134
5135                 iwl4965_irq_handle_error(priv);
5136
5137                 handled |= CSR_INT_BIT_HW_ERR;
5138
5139                 spin_unlock_irqrestore(&priv->lock, flags);
5140
5141                 return;
5142         }
5143
5144 #ifdef CONFIG_IWL4965_DEBUG
5145         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5146                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5147                 if (inta & CSR_INT_BIT_SCD)
5148                         IWL_DEBUG_ISR("Scheduler finished to transmit "
5149                                       "the frame/frames.\n");
5150
5151                 /* Alive notification via Rx interrupt will do the real work */
5152                 if (inta & CSR_INT_BIT_ALIVE)
5153                         IWL_DEBUG_ISR("Alive interrupt\n");
5154         }
5155 #endif
5156         /* Safely ignore these bits for debug checks below */
5157         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
5158
5159         /* HW RF KILL switch toggled */
5160         if (inta & CSR_INT_BIT_RF_KILL) {
5161                 int hw_rf_kill = 0;
5162                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
5163                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5164                         hw_rf_kill = 1;
5165
5166                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5167                                 "RF_KILL bit toggled to %s.\n",
5168                                 hw_rf_kill ? "disable radio":"enable radio");
5169
5170                 /* Queue restart only if RF_KILL switch was set to "kill"
5171                  *   when we loaded driver, and is now set to "enable".
5172                  * After we're Alive, RF_KILL gets handled by
5173                  *   iwl_rx_card_state_notif() */
5174                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5175                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5176                         queue_work(priv->workqueue, &priv->restart);
5177                 }
5178
5179                 handled |= CSR_INT_BIT_RF_KILL;
5180         }
5181
5182         /* Chip got too hot and stopped itself */
5183         if (inta & CSR_INT_BIT_CT_KILL) {
5184                 IWL_ERROR("Microcode CT kill error detected.\n");
5185                 handled |= CSR_INT_BIT_CT_KILL;
5186         }
5187
5188         /* Error detected by uCode */
5189         if (inta & CSR_INT_BIT_SW_ERR) {
5190                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5191                           inta);
5192                 iwl4965_irq_handle_error(priv);
5193                 handled |= CSR_INT_BIT_SW_ERR;
5194         }
5195
5196         /* uCode wakes up after power-down sleep */
5197         if (inta & CSR_INT_BIT_WAKEUP) {
5198                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5199                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
5200                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5201                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5202                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5203                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5204                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5205                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5206
5207                 handled |= CSR_INT_BIT_WAKEUP;
5208         }
5209
5210         /* All uCode command responses, including Tx command responses,
5211          * Rx "responses" (frame-received notification), and other
5212          * notifications from uCode come through here*/
5213         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5214                 iwl4965_rx_handle(priv);
5215                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5216         }
5217
5218         if (inta & CSR_INT_BIT_FH_TX) {
5219                 IWL_DEBUG_ISR("Tx interrupt\n");
5220                 handled |= CSR_INT_BIT_FH_TX;
5221         }
5222
5223         if (inta & ~handled)
5224                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5225
5226         if (inta & ~CSR_INI_SET_MASK) {
5227                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5228                          inta & ~CSR_INI_SET_MASK);
5229                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5230         }
5231
5232         /* Re-enable all interrupts */
5233         iwl4965_enable_interrupts(priv);
5234
5235 #ifdef CONFIG_IWL4965_DEBUG
5236         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5237                 inta = iwl4965_read32(priv, CSR_INT);
5238                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5239                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5240                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5241                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5242         }
5243 #endif
5244         spin_unlock_irqrestore(&priv->lock, flags);
5245 }
5246
5247 static irqreturn_t iwl4965_isr(int irq, void *data)
5248 {
5249         struct iwl4965_priv *priv = data;
5250         u32 inta, inta_mask;
5251         u32 inta_fh;
5252         if (!priv)
5253                 return IRQ_NONE;
5254
5255         spin_lock(&priv->lock);
5256
5257         /* Disable (but don't clear!) interrupts here to avoid
5258          *    back-to-back ISRs and sporadic interrupts from our NIC.
5259          * If we have something to service, the tasklet will re-enable ints.
5260          * If we *don't* have something, we'll re-enable before leaving here. */
5261         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
5262         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
5263
5264         /* Discover which interrupts are active/pending */
5265         inta = iwl4965_read32(priv, CSR_INT);
5266         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5267
5268         /* Ignore interrupt if there's nothing in NIC to service.
5269          * This may be due to IRQ shared with another device,
5270          * or due to sporadic interrupts thrown from our NIC. */
5271         if (!inta && !inta_fh) {
5272                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5273                 goto none;
5274         }
5275
5276         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5277                 /* Hardware disappeared. It might have already raised
5278                  * an interrupt */
5279                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5280                 goto unplugged;
5281         }
5282
5283         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5284                       inta, inta_mask, inta_fh);
5285
5286         inta &= ~CSR_INT_BIT_SCD;
5287
5288         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
5289         if (likely(inta || inta_fh))
5290                 tasklet_schedule(&priv->irq_tasklet);
5291
5292  unplugged:
5293         spin_unlock(&priv->lock);
5294         return IRQ_HANDLED;
5295
5296  none:
5297         /* re-enable interrupts here since we don't have anything to service. */
5298         iwl4965_enable_interrupts(priv);
5299         spin_unlock(&priv->lock);
5300         return IRQ_NONE;
5301 }
5302
5303 /************************** EEPROM BANDS ****************************
5304  *
5305  * The iwl4965_eeprom_band definitions below provide the mapping from the
5306  * EEPROM contents to the specific channel number supported for each
5307  * band.
5308  *
5309  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5310  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5311  * The specific geography and calibration information for that channel
5312  * is contained in the eeprom map itself.
5313  *
5314  * During init, we copy the eeprom information and channel map
5315  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5316  *
5317  * channel_map_24/52 provides the index in the channel_info array for a
5318  * given channel.  We have to have two separate maps as there is channel
5319  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5320  * band_2
5321  *
5322  * A value of 0xff stored in the channel_map indicates that the channel
5323  * is not supported by the hardware at all.
5324  *
5325  * A value of 0xfe in the channel_map indicates that the channel is not
5326  * valid for Tx with the current hardware.  This means that
5327  * while the system can tune and receive on a given channel, it may not
5328  * be able to associate or transmit any frames on that
5329  * channel.  There is no corresponding channel information for that
5330  * entry.
5331  *
5332  *********************************************************************/
5333
5334 /* 2.4 GHz */
5335 static const u8 iwl4965_eeprom_band_1[14] = {
5336         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5337 };
5338
5339 /* 5.2 GHz bands */
5340 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5341         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5342 };
5343
5344 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5345         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5346 };
5347
5348 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5349         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5350 };
5351
5352 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5353         145, 149, 153, 157, 161, 165
5354 };
5355
5356 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5357         1, 2, 3, 4, 5, 6, 7
5358 };
5359
5360 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5361         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5362 };
5363
5364 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5365                                     int band,
5366                                     int *eeprom_ch_count,
5367                                     const struct iwl4965_eeprom_channel
5368                                     **eeprom_ch_info,
5369                                     const u8 **eeprom_ch_index)
5370 {
5371         switch (band) {
5372         case 1:         /* 2.4GHz band */
5373                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5374                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5375                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5376                 break;
5377         case 2:         /* 4.9GHz band */
5378                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5379                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5380                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5381                 break;
5382         case 3:         /* 5.2GHz band */
5383                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5384                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5385                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5386                 break;
5387         case 4:         /* 5.5GHz band */
5388                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5389                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5390                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5391                 break;
5392         case 5:         /* 5.7GHz band */
5393                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5394                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5395                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5396                 break;
5397         case 6:         /* 2.4GHz FAT channels */
5398                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5399                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5400                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5401                 break;
5402         case 7:         /* 5 GHz FAT channels */
5403                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5404                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5405                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5406                 break;
5407         default:
5408                 BUG();
5409                 return;
5410         }
5411 }
5412
5413 /**
5414  * iwl4965_get_channel_info - Find driver's private channel info
5415  *
5416  * Based on band and channel number.
5417  */
5418 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5419                                                     int phymode, u16 channel)
5420 {
5421         int i;
5422
5423         switch (phymode) {
5424         case MODE_IEEE80211A:
5425                 for (i = 14; i < priv->channel_count; i++) {
5426                         if (priv->channel_info[i].channel == channel)
5427                                 return &priv->channel_info[i];
5428                 }
5429                 break;
5430
5431         case MODE_IEEE80211B:
5432         case MODE_IEEE80211G:
5433                 if (channel >= 1 && channel <= 14)
5434                         return &priv->channel_info[channel - 1];
5435                 break;
5436
5437         }
5438
5439         return NULL;
5440 }
5441
5442 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5443                             ? # x " " : "")
5444
5445 /**
5446  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5447  */
5448 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5449 {
5450         int eeprom_ch_count = 0;
5451         const u8 *eeprom_ch_index = NULL;
5452         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5453         int band, ch;
5454         struct iwl4965_channel_info *ch_info;
5455
5456         if (priv->channel_count) {
5457                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5458                 return 0;
5459         }
5460
5461         if (priv->eeprom.version < 0x2f) {
5462                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5463                             priv->eeprom.version);
5464                 return -EINVAL;
5465         }
5466
5467         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5468
5469         priv->channel_count =
5470             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5471             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5472             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5473             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5474             ARRAY_SIZE(iwl4965_eeprom_band_5);
5475
5476         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5477
5478         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5479                                      priv->channel_count, GFP_KERNEL);
5480         if (!priv->channel_info) {
5481                 IWL_ERROR("Could not allocate channel_info\n");
5482                 priv->channel_count = 0;
5483                 return -ENOMEM;
5484         }
5485
5486         ch_info = priv->channel_info;
5487
5488         /* Loop through the 5 EEPROM bands adding them in order to the
5489          * channel map we maintain (that contains additional information than
5490          * what just in the EEPROM) */
5491         for (band = 1; band <= 5; band++) {
5492
5493                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5494                                         &eeprom_ch_info, &eeprom_ch_index);
5495
5496                 /* Loop through each band adding each of the channels */
5497                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5498                         ch_info->channel = eeprom_ch_index[ch];
5499                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5500                             MODE_IEEE80211A;
5501
5502                         /* permanently store EEPROM's channel regulatory flags
5503                          *   and max power in channel info database. */
5504                         ch_info->eeprom = eeprom_ch_info[ch];
5505
5506                         /* Copy the run-time flags so they are there even on
5507                          * invalid channels */
5508                         ch_info->flags = eeprom_ch_info[ch].flags;
5509
5510                         if (!(is_channel_valid(ch_info))) {
5511                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5512                                                "No traffic\n",
5513                                                ch_info->channel,
5514                                                ch_info->flags,
5515                                                is_channel_a_band(ch_info) ?
5516                                                "5.2" : "2.4");
5517                                 ch_info++;
5518                                 continue;
5519                         }
5520
5521                         /* Initialize regulatory-based run-time data */
5522                         ch_info->max_power_avg = ch_info->curr_txpow =
5523                             eeprom_ch_info[ch].max_power_avg;
5524                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5525                         ch_info->min_power = 0;
5526
5527                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5528                                        " %ddBm): Ad-Hoc %ssupported\n",
5529                                        ch_info->channel,
5530                                        is_channel_a_band(ch_info) ?
5531                                        "5.2" : "2.4",
5532                                        CHECK_AND_PRINT(IBSS),
5533                                        CHECK_AND_PRINT(ACTIVE),
5534                                        CHECK_AND_PRINT(RADAR),
5535                                        CHECK_AND_PRINT(WIDE),
5536                                        CHECK_AND_PRINT(NARROW),
5537                                        CHECK_AND_PRINT(DFS),
5538                                        eeprom_ch_info[ch].flags,
5539                                        eeprom_ch_info[ch].max_power_avg,
5540                                        ((eeprom_ch_info[ch].
5541                                          flags & EEPROM_CHANNEL_IBSS)
5542                                         && !(eeprom_ch_info[ch].
5543                                              flags & EEPROM_CHANNEL_RADAR))
5544                                        ? "" : "not ");
5545
5546                         /* Set the user_txpower_limit to the highest power
5547                          * supported by any channel */
5548                         if (eeprom_ch_info[ch].max_power_avg >
5549                             priv->user_txpower_limit)
5550                                 priv->user_txpower_limit =
5551                                     eeprom_ch_info[ch].max_power_avg;
5552
5553                         ch_info++;
5554                 }
5555         }
5556
5557         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5558         for (band = 6; band <= 7; band++) {
5559                 int phymode;
5560                 u8 fat_extension_chan;
5561
5562                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5563                                         &eeprom_ch_info, &eeprom_ch_index);
5564
5565                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5566                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5567
5568                 /* Loop through each band adding each of the channels */
5569                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5570
5571                         if ((band == 6) &&
5572                             ((eeprom_ch_index[ch] == 5) ||
5573                             (eeprom_ch_index[ch] == 6) ||
5574                             (eeprom_ch_index[ch] == 7)))
5575                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5576                         else
5577                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5578
5579                         /* Set up driver's info for lower half */
5580                         iwl4965_set_fat_chan_info(priv, phymode,
5581                                                   eeprom_ch_index[ch],
5582                                                   &(eeprom_ch_info[ch]),
5583                                                   fat_extension_chan);
5584
5585                         /* Set up driver's info for upper half */
5586                         iwl4965_set_fat_chan_info(priv, phymode,
5587                                                   (eeprom_ch_index[ch] + 4),
5588                                                   &(eeprom_ch_info[ch]),
5589                                                   HT_IE_EXT_CHANNEL_BELOW);
5590                 }
5591         }
5592
5593         return 0;
5594 }
5595
5596 /*
5597  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5598  */
5599 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5600 {
5601         kfree(priv->channel_info);
5602         priv->channel_count = 0;
5603 }
5604
5605 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5606  * sending probe req.  This should be set long enough to hear probe responses
5607  * from more than one AP.  */
5608 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5609 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5610
5611 /* For faster active scanning, scan will move to the next channel if fewer than
5612  * PLCP_QUIET_THRESH packets are heard on this channel within
5613  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5614  * time if it's a quiet channel (nothing responded to our probe, and there's
5615  * no other traffic).
5616  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5617 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5618 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5619
5620 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5621  * Must be set longer than active dwell time.
5622  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5623 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5624 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5625 #define IWL_PASSIVE_DWELL_BASE      (100)
5626 #define IWL_CHANNEL_TUNE_TIME       5
5627
5628 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv, int phymode)
5629 {
5630         if (phymode == MODE_IEEE80211A)
5631                 return IWL_ACTIVE_DWELL_TIME_52;
5632         else
5633                 return IWL_ACTIVE_DWELL_TIME_24;
5634 }
5635
5636 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv, int phymode)
5637 {
5638         u16 active = iwl4965_get_active_dwell_time(priv, phymode);
5639         u16 passive = (phymode != MODE_IEEE80211A) ?
5640             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5641             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5642
5643         if (iwl4965_is_associated(priv)) {
5644                 /* If we're associated, we clamp the maximum passive
5645                  * dwell time to be 98% of the beacon interval (minus
5646                  * 2 * channel tune time) */
5647                 passive = priv->beacon_int;
5648                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5649                         passive = IWL_PASSIVE_DWELL_BASE;
5650                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5651         }
5652
5653         if (passive <= active)
5654                 passive = active + 1;
5655
5656         return passive;
5657 }
5658
5659 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
5660                                      u8 is_active, u8 direct_mask,
5661                                      struct iwl4965_scan_channel *scan_ch)
5662 {
5663         const struct ieee80211_channel *channels = NULL;
5664         const struct ieee80211_hw_mode *hw_mode;
5665         const struct iwl4965_channel_info *ch_info;
5666         u16 passive_dwell = 0;
5667         u16 active_dwell = 0;
5668         int added, i;
5669
5670         hw_mode = iwl4965_get_hw_mode(priv, phymode);
5671         if (!hw_mode)
5672                 return 0;
5673
5674         channels = hw_mode->channels;
5675
5676         active_dwell = iwl4965_get_active_dwell_time(priv, phymode);
5677         passive_dwell = iwl4965_get_passive_dwell_time(priv, phymode);
5678
5679         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5680                 if (channels[i].chan ==
5681                     le16_to_cpu(priv->active_rxon.channel)) {
5682                         if (iwl4965_is_associated(priv)) {
5683                                 IWL_DEBUG_SCAN
5684                                     ("Skipping current channel %d\n",
5685                                      le16_to_cpu(priv->active_rxon.channel));
5686                                 continue;
5687                         }
5688                 } else if (priv->only_active_channel)
5689                         continue;
5690
5691                 scan_ch->channel = channels[i].chan;
5692
5693                 ch_info = iwl4965_get_channel_info(priv, phymode,
5694                                          scan_ch->channel);
5695                 if (!is_channel_valid(ch_info)) {
5696                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5697                                        scan_ch->channel);
5698                         continue;
5699                 }
5700
5701                 if (!is_active || is_channel_passive(ch_info) ||
5702                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5703                         scan_ch->type = 0;      /* passive */
5704                 else
5705                         scan_ch->type = 1;      /* active */
5706
5707                 if (scan_ch->type & 1)
5708                         scan_ch->type |= (direct_mask << 1);
5709
5710                 if (is_channel_narrow(ch_info))
5711                         scan_ch->type |= (1 << 7);
5712
5713                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5714                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5715
5716                 /* Set txpower levels to defaults */
5717                 scan_ch->tpc.dsp_atten = 110;
5718                 /* scan_pwr_info->tpc.dsp_atten; */
5719
5720                 /*scan_pwr_info->tpc.tx_gain; */
5721                 if (phymode == MODE_IEEE80211A)
5722                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5723                 else {
5724                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5725                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5726                          * power level:
5727                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5728                          */
5729                 }
5730
5731                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5732                                scan_ch->channel,
5733                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5734                                (scan_ch->type & 1) ?
5735                                active_dwell : passive_dwell);
5736
5737                 scan_ch++;
5738                 added++;
5739         }
5740
5741         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5742         return added;
5743 }
5744
5745 static void iwl4965_reset_channel_flag(struct iwl4965_priv *priv)
5746 {
5747         int i, j;
5748         for (i = 0; i < 3; i++) {
5749                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5750                 for (j = 0; j < hw_mode->num_channels; j++)
5751                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5752         }
5753 }
5754
5755 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5756                               struct ieee80211_rate *rates)
5757 {
5758         int i;
5759
5760         for (i = 0; i < IWL_RATE_COUNT; i++) {
5761                 rates[i].rate = iwl4965_rates[i].ieee * 5;
5762                 rates[i].val = i; /* Rate scaling will work on indexes */
5763                 rates[i].val2 = i;
5764                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5765                 /* Only OFDM have the bits-per-symbol set */
5766                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5767                         rates[i].flags |= IEEE80211_RATE_OFDM;
5768                 else {
5769                         /*
5770                          * If CCK 1M then set rate flag to CCK else CCK_2
5771                          * which is CCK | PREAMBLE2
5772                          */
5773                         rates[i].flags |= (iwl4965_rates[i].plcp == 10) ?
5774                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5775                 }
5776
5777                 /* Set up which ones are basic rates... */
5778                 if (IWL_BASIC_RATES_MASK & (1 << i))
5779                         rates[i].flags |= IEEE80211_RATE_BASIC;
5780         }
5781 }
5782
5783 /**
5784  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5785  */
5786 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5787 {
5788         struct iwl4965_channel_info *ch;
5789         struct ieee80211_hw_mode *modes;
5790         struct ieee80211_channel *channels;
5791         struct ieee80211_channel *geo_ch;
5792         struct ieee80211_rate *rates;
5793         int i = 0;
5794         enum {
5795                 A = 0,
5796                 B = 1,
5797                 G = 2,
5798         };
5799         int mode_count = 3;
5800
5801         if (priv->modes) {
5802                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5803                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5804                 return 0;
5805         }
5806
5807         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5808                         GFP_KERNEL);
5809         if (!modes)
5810                 return -ENOMEM;
5811
5812         channels = kzalloc(sizeof(struct ieee80211_channel) *
5813                            priv->channel_count, GFP_KERNEL);
5814         if (!channels) {
5815                 kfree(modes);
5816                 return -ENOMEM;
5817         }
5818
5819         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5820                         GFP_KERNEL);
5821         if (!rates) {
5822                 kfree(modes);
5823                 kfree(channels);
5824                 return -ENOMEM;
5825         }
5826
5827         /* 0 = 802.11a
5828          * 1 = 802.11b
5829          * 2 = 802.11g
5830          */
5831
5832         /* 5.2GHz channels start after the 2.4GHz channels */
5833         modes[A].mode = MODE_IEEE80211A;
5834         modes[A].channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5835         modes[A].rates = rates;
5836         modes[A].num_rates = 8; /* just OFDM */
5837         modes[A].rates = &rates[4];
5838         modes[A].num_channels = 0;
5839 #ifdef CONFIG_IWL4965_HT
5840         iwl4965_init_ht_hw_capab(&modes[A].ht_info, MODE_IEEE80211A);
5841 #endif
5842
5843         modes[B].mode = MODE_IEEE80211B;
5844         modes[B].channels = channels;
5845         modes[B].rates = rates;
5846         modes[B].num_rates = 4; /* just CCK */
5847         modes[B].num_channels = 0;
5848
5849         modes[G].mode = MODE_IEEE80211G;
5850         modes[G].channels = channels;
5851         modes[G].rates = rates;
5852         modes[G].num_rates = 12;        /* OFDM & CCK */
5853         modes[G].num_channels = 0;
5854 #ifdef CONFIG_IWL4965_HT
5855         iwl4965_init_ht_hw_capab(&modes[G].ht_info, MODE_IEEE80211G);
5856 #endif
5857
5858         priv->ieee_channels = channels;
5859         priv->ieee_rates = rates;
5860
5861         iwl4965_init_hw_rates(priv, rates);
5862
5863         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5864                 ch = &priv->channel_info[i];
5865
5866                 if (!is_channel_valid(ch)) {
5867                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5868                                     "skipping.\n",
5869                                     ch->channel, is_channel_a_band(ch) ?
5870                                     "5.2" : "2.4");
5871                         continue;
5872                 }
5873
5874                 if (is_channel_a_band(ch)) {
5875                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5876                 } else {
5877                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5878                         modes[G].num_channels++;
5879                 }
5880
5881                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5882                 geo_ch->chan = ch->channel;
5883                 geo_ch->power_level = ch->max_power_avg;
5884                 geo_ch->antenna_max = 0xff;
5885
5886                 if (is_channel_valid(ch)) {
5887                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5888                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5889                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5890
5891                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5892                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5893
5894                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5895                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5896
5897                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5898                                 priv->max_channel_txpower_limit =
5899                                     ch->max_power_avg;
5900                 }
5901
5902                 geo_ch->val = geo_ch->flag;
5903         }
5904
5905         if ((modes[A].num_channels == 0) && priv->is_abg) {
5906                 printk(KERN_INFO DRV_NAME
5907                        ": Incorrectly detected BG card as ABG.  Please send "
5908                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5909                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5910                 priv->is_abg = 0;
5911         }
5912
5913         printk(KERN_INFO DRV_NAME
5914                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5915                modes[G].num_channels, modes[A].num_channels);
5916
5917         /*
5918          * NOTE:  We register these in preference of order -- the
5919          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5920          * a phymode based on rates or AP capabilities but seems to
5921          * configure it purely on if the channel being configured
5922          * is supported by a mode -- and the first match is taken
5923          */
5924
5925         if (modes[G].num_channels)
5926                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5927         if (modes[B].num_channels)
5928                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5929         if (modes[A].num_channels)
5930                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5931
5932         priv->modes = modes;
5933         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5934
5935         return 0;
5936 }
5937
5938 /*
5939  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5940  */
5941 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5942 {
5943         kfree(priv->modes);
5944         kfree(priv->ieee_channels);
5945         kfree(priv->ieee_rates);
5946         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5947 }
5948
5949 /******************************************************************************
5950  *
5951  * uCode download functions
5952  *
5953  ******************************************************************************/
5954
5955 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5956 {
5957         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5958         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5959         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5960         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5961         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5962         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5963 }
5964
5965 /**
5966  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5967  *     looking at all data.
5968  */
5969 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5970                                  u32 len)
5971 {
5972         u32 val;
5973         u32 save_len = len;
5974         int rc = 0;
5975         u32 errcnt;
5976
5977         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5978
5979         rc = iwl4965_grab_nic_access(priv);
5980         if (rc)
5981                 return rc;
5982
5983         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5984
5985         errcnt = 0;
5986         for (; len > 0; len -= sizeof(u32), image++) {
5987                 /* read data comes through single&