ad45249454f09693854aea7175b06e5b44cc2d99
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2008 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-eeprom.h"
49 #include "iwl-dev.h"
50 #include "iwl-core.h"
51 #include "iwl-io.h"
52 #include "iwl-helpers.h"
53 #include "iwl-sta.h"
54 #include "iwl-calib.h"
55
56 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
57                                   struct iwl4965_tx_queue *txq);
58
59 /******************************************************************************
60  *
61  * module boiler plate
62  *
63  ******************************************************************************/
64
65 /*
66  * module name, copyright, version, etc.
67  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
68  */
69
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
79 #define VS "s"
80 #else
81 #define VS
82 #endif
83
84 #define DRV_VERSION     IWLWIFI_VERSION VD VS
85
86
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_VERSION(DRV_VERSION);
89 MODULE_AUTHOR(DRV_COPYRIGHT);
90 MODULE_LICENSE("GPL");
91
92 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
93 {
94         u16 fc = le16_to_cpu(hdr->frame_control);
95         int hdr_len = ieee80211_get_hdrlen(fc);
96
97         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
98                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
99         return NULL;
100 }
101
102 static const struct ieee80211_supported_band *iwl_get_hw_mode(
103                 struct iwl_priv *priv, enum ieee80211_band band)
104 {
105         return priv->hw->wiphy->bands[band];
106 }
107
108 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
109 {
110         /* Single white space is for Linksys APs */
111         if (essid_len == 1 && essid[0] == ' ')
112                 return 1;
113
114         /* Otherwise, if the entire essid is 0, we assume it is hidden */
115         while (essid_len) {
116                 essid_len--;
117                 if (essid[essid_len] != '\0')
118                         return 0;
119         }
120
121         return 1;
122 }
123
124 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
125 {
126         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
127         const char *s = essid;
128         char *d = escaped;
129
130         if (iwl4965_is_empty_essid(essid, essid_len)) {
131                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
132                 return escaped;
133         }
134
135         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
136         while (essid_len--) {
137                 if (*s == '\0') {
138                         *d++ = '\\';
139                         *d++ = '0';
140                         s++;
141                 } else
142                         *d++ = *s++;
143         }
144         *d = '\0';
145         return escaped;
146 }
147
148
149 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
150  * DMA services
151  *
152  * Theory of operation
153  *
154  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
155  * of buffer descriptors, each of which points to one or more data buffers for
156  * the device to read from or fill.  Driver and device exchange status of each
157  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
158  * entries in each circular buffer, to protect against confusing empty and full
159  * queue states.
160  *
161  * The device reads or writes the data in the queues via the device's several
162  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
163  *
164  * For Tx queue, there are low mark and high mark limits. If, after queuing
165  * the packet for Tx, free space become < low mark, Tx queue stopped. When
166  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
167  * Tx queue resumed.
168  *
169  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
170  * queue (#4) for sending commands to the device firmware, and 15 other
171  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
172  *
173  * See more detailed info in iwl-4965-hw.h.
174  ***************************************************/
175
176 int iwl4965_queue_space(const struct iwl4965_queue *q)
177 {
178         int s = q->read_ptr - q->write_ptr;
179
180         if (q->read_ptr > q->write_ptr)
181                 s -= q->n_bd;
182
183         if (s <= 0)
184                 s += q->n_window;
185         /* keep some reserve to not confuse empty and full situations */
186         s -= 2;
187         if (s < 0)
188                 s = 0;
189         return s;
190 }
191
192
193 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
194 {
195         return q->write_ptr > q->read_ptr ?
196                 (i >= q->read_ptr && i < q->write_ptr) :
197                 !(i < q->read_ptr && i >= q->write_ptr);
198 }
199
200 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
201 {
202         /* This is for scan command, the big buffer at end of command array */
203         if (is_huge)
204                 return q->n_window;     /* must be power of 2 */
205
206         /* Otherwise, use normal size buffers */
207         return index & (q->n_window - 1);
208 }
209
210 /**
211  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
212  */
213 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
214                           int count, int slots_num, u32 id)
215 {
216         q->n_bd = count;
217         q->n_window = slots_num;
218         q->id = id;
219
220         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
221          * and iwl_queue_dec_wrap are broken. */
222         BUG_ON(!is_power_of_2(count));
223
224         /* slots_num must be power-of-two size, otherwise
225          * get_cmd_index is broken. */
226         BUG_ON(!is_power_of_2(slots_num));
227
228         q->low_mark = q->n_window / 4;
229         if (q->low_mark < 4)
230                 q->low_mark = 4;
231
232         q->high_mark = q->n_window / 8;
233         if (q->high_mark < 2)
234                 q->high_mark = 2;
235
236         q->write_ptr = q->read_ptr = 0;
237
238         return 0;
239 }
240
241 /**
242  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
243  */
244 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
245                               struct iwl4965_tx_queue *txq, u32 id)
246 {
247         struct pci_dev *dev = priv->pci_dev;
248
249         /* Driver private data, only for Tx (not command) queues,
250          * not shared with device. */
251         if (id != IWL_CMD_QUEUE_NUM) {
252                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
253                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
254                 if (!txq->txb) {
255                         IWL_ERROR("kmalloc for auxiliary BD "
256                                   "structures failed\n");
257                         goto error;
258                 }
259         } else
260                 txq->txb = NULL;
261
262         /* Circular buffer of transmit frame descriptors (TFDs),
263          * shared with device */
264         txq->bd = pci_alloc_consistent(dev,
265                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
266                         &txq->q.dma_addr);
267
268         if (!txq->bd) {
269                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
270                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
271                 goto error;
272         }
273         txq->q.id = id;
274
275         return 0;
276
277  error:
278         if (txq->txb) {
279                 kfree(txq->txb);
280                 txq->txb = NULL;
281         }
282
283         return -ENOMEM;
284 }
285
286 /**
287  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
288  */
289 int iwl4965_tx_queue_init(struct iwl_priv *priv,
290                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
291 {
292         struct pci_dev *dev = priv->pci_dev;
293         int len;
294         int rc = 0;
295
296         /*
297          * Alloc buffer array for commands (Tx or other types of commands).
298          * For the command queue (#4), allocate command space + one big
299          * command for scan, since scan command is very huge; the system will
300          * not have two scans at the same time, so only one is needed.
301          * For normal Tx queues (all other queues), no super-size command
302          * space is needed.
303          */
304         len = sizeof(struct iwl_cmd) * slots_num;
305         if (txq_id == IWL_CMD_QUEUE_NUM)
306                 len +=  IWL_MAX_SCAN_SIZE;
307         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
308         if (!txq->cmd)
309                 return -ENOMEM;
310
311         /* Alloc driver data array and TFD circular buffer */
312         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
313         if (rc) {
314                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
315
316                 return -ENOMEM;
317         }
318         txq->need_update = 0;
319
320         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
321          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
322         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
323
324         /* Initialize queue's high/low-water marks, and head/tail indexes */
325         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
326
327         /* Tell device where to find queue */
328         iwl4965_hw_tx_queue_init(priv, txq);
329
330         return 0;
331 }
332
333 /**
334  * iwl4965_tx_queue_free - Deallocate DMA queue.
335  * @txq: Transmit queue to deallocate.
336  *
337  * Empty queue by removing and destroying all BD's.
338  * Free all buffers.
339  * 0-fill, but do not free "txq" descriptor structure.
340  */
341 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
342 {
343         struct iwl4965_queue *q = &txq->q;
344         struct pci_dev *dev = priv->pci_dev;
345         int len;
346
347         if (q->n_bd == 0)
348                 return;
349
350         /* first, empty all BD's */
351         for (; q->write_ptr != q->read_ptr;
352              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
353                 iwl4965_hw_txq_free_tfd(priv, txq);
354
355         len = sizeof(struct iwl_cmd) * q->n_window;
356         if (q->id == IWL_CMD_QUEUE_NUM)
357                 len += IWL_MAX_SCAN_SIZE;
358
359         /* De-alloc array of command/tx buffers */
360         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
361
362         /* De-alloc circular buffer of TFDs */
363         if (txq->q.n_bd)
364                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
365                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
366
367         /* De-alloc array of per-TFD driver data */
368         if (txq->txb) {
369                 kfree(txq->txb);
370                 txq->txb = NULL;
371         }
372
373         /* 0-fill queue descriptor structure */
374         memset(txq, 0, sizeof(*txq));
375 }
376
377 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
378
379 /*************** STATION TABLE MANAGEMENT ****
380  * mac80211 should be examined to determine if sta_info is duplicating
381  * the functionality provided here
382  */
383
384 /**************************************************************/
385
386 #if 0 /* temporary disable till we add real remove station */
387 /**
388  * iwl4965_remove_station - Remove driver's knowledge of station.
389  *
390  * NOTE:  This does not remove station from device's station table.
391  */
392 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
393 {
394         int index = IWL_INVALID_STATION;
395         int i;
396         unsigned long flags;
397
398         spin_lock_irqsave(&priv->sta_lock, flags);
399
400         if (is_ap)
401                 index = IWL_AP_ID;
402         else if (is_broadcast_ether_addr(addr))
403                 index = priv->hw_params.bcast_sta_id;
404         else
405                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
406                         if (priv->stations[i].used &&
407                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
408                                                 addr)) {
409                                 index = i;
410                                 break;
411                         }
412
413         if (unlikely(index == IWL_INVALID_STATION))
414                 goto out;
415
416         if (priv->stations[index].used) {
417                 priv->stations[index].used = 0;
418                 priv->num_stations--;
419         }
420
421         BUG_ON(priv->num_stations < 0);
422
423 out:
424         spin_unlock_irqrestore(&priv->sta_lock, flags);
425         return 0;
426 }
427 #endif
428
429 /**
430  * iwl4965_add_station_flags - Add station to tables in driver and device
431  */
432 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
433                                 int is_ap, u8 flags, void *ht_data)
434 {
435         int i;
436         int index = IWL_INVALID_STATION;
437         struct iwl_station_entry *station;
438         unsigned long flags_spin;
439         DECLARE_MAC_BUF(mac);
440
441         spin_lock_irqsave(&priv->sta_lock, flags_spin);
442         if (is_ap)
443                 index = IWL_AP_ID;
444         else if (is_broadcast_ether_addr(addr))
445                 index = priv->hw_params.bcast_sta_id;
446         else
447                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
448                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
449                                                 addr)) {
450                                 index = i;
451                                 break;
452                         }
453
454                         if (!priv->stations[i].used &&
455                             index == IWL_INVALID_STATION)
456                                 index = i;
457                 }
458
459
460         /* These two conditions have the same outcome, but keep them separate
461           since they have different meanings */
462         if (unlikely(index == IWL_INVALID_STATION)) {
463                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
464                 return index;
465         }
466
467         if (priv->stations[index].used &&
468             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
469                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
470                 return index;
471         }
472
473
474         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
475         station = &priv->stations[index];
476         station->used = 1;
477         priv->num_stations++;
478
479         /* Set up the REPLY_ADD_STA command to send to device */
480         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
481         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
482         station->sta.mode = 0;
483         station->sta.sta.sta_id = index;
484         station->sta.station_flags = 0;
485
486 #ifdef CONFIG_IWL4965_HT
487         /* BCAST station and IBSS stations do not work in HT mode */
488         if (index != priv->hw_params.bcast_sta_id &&
489             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
490                 iwl4965_set_ht_add_station(priv, index,
491                                  (struct ieee80211_ht_info *) ht_data);
492 #endif /*CONFIG_IWL4965_HT*/
493
494         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
495
496         /* Add station to device's station table */
497         iwl_send_add_sta(priv, &station->sta, flags);
498         return index;
499
500 }
501
502
503
504 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
505
506 /**
507  * iwl4965_enqueue_hcmd - enqueue a uCode command
508  * @priv: device private data point
509  * @cmd: a point to the ucode command structure
510  *
511  * The function returns < 0 values to indicate the operation is
512  * failed. On success, it turns the index (> 0) of command in the
513  * command queue.
514  */
515 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
516 {
517         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
518         struct iwl4965_queue *q = &txq->q;
519         struct iwl4965_tfd_frame *tfd;
520         u32 *control_flags;
521         struct iwl_cmd *out_cmd;
522         u32 idx;
523         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
524         dma_addr_t phys_addr;
525         int ret;
526         unsigned long flags;
527
528         /* If any of the command structures end up being larger than
529          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
530          * we will need to increase the size of the TFD entries */
531         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
532                !(cmd->meta.flags & CMD_SIZE_HUGE));
533
534         if (iwl_is_rfkill(priv)) {
535                 IWL_DEBUG_INFO("Not sending command - RF KILL");
536                 return -EIO;
537         }
538
539         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
540                 IWL_ERROR("No space for Tx\n");
541                 return -ENOSPC;
542         }
543
544         spin_lock_irqsave(&priv->hcmd_lock, flags);
545
546         tfd = &txq->bd[q->write_ptr];
547         memset(tfd, 0, sizeof(*tfd));
548
549         control_flags = (u32 *) tfd;
550
551         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
552         out_cmd = &txq->cmd[idx];
553
554         out_cmd->hdr.cmd = cmd->id;
555         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
556         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
557
558         /* At this point, the out_cmd now has all of the incoming cmd
559          * information */
560
561         out_cmd->hdr.flags = 0;
562         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
563                         INDEX_TO_SEQ(q->write_ptr));
564         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
565                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
566
567         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
568                         offsetof(struct iwl_cmd, hdr);
569         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
570
571         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
572                      "%d bytes at %d[%d]:%d\n",
573                      get_cmd_string(out_cmd->hdr.cmd),
574                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
575                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
576
577         txq->need_update = 1;
578
579         /* Set up entry in queue's byte count circular buffer */
580         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
581
582         /* Increment and update queue's write index */
583         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
584         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
585
586         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
587         return ret ? ret : idx;
588 }
589
590 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
591 {
592         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
593
594         if (hw_decrypt)
595                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
596         else
597                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
598
599 }
600
601 /**
602  * iwl4965_rxon_add_station - add station into station table.
603  *
604  * there is only one AP station with id= IWL_AP_ID
605  * NOTE: mutex must be held before calling this fnction
606  */
607 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
608                                 const u8 *addr, int is_ap)
609 {
610         u8 sta_id;
611
612         /* Add station to device's station table */
613 #ifdef CONFIG_IWL4965_HT
614         struct ieee80211_conf *conf = &priv->hw->conf;
615         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
616
617         if ((is_ap) &&
618             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
619             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
620                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
621                                                    0, cur_ht_config);
622         else
623 #endif /* CONFIG_IWL4965_HT */
624                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
625                                                    0, NULL);
626
627         /* Set up default rate scaling table in device's station table */
628         iwl4965_add_station(priv, addr, is_ap);
629
630         return sta_id;
631 }
632
633 /**
634  * iwl4965_check_rxon_cmd - validate RXON structure is valid
635  *
636  * NOTE:  This is really only useful during development and can eventually
637  * be #ifdef'd out once the driver is stable and folks aren't actively
638  * making changes
639  */
640 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
641 {
642         int error = 0;
643         int counter = 1;
644
645         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
646                 error |= le32_to_cpu(rxon->flags &
647                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
648                                  RXON_FLG_RADAR_DETECT_MSK));
649                 if (error)
650                         IWL_WARNING("check 24G fields %d | %d\n",
651                                     counter++, error);
652         } else {
653                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
654                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
655                 if (error)
656                         IWL_WARNING("check 52 fields %d | %d\n",
657                                     counter++, error);
658                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
659                 if (error)
660                         IWL_WARNING("check 52 CCK %d | %d\n",
661                                     counter++, error);
662         }
663         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
664         if (error)
665                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
666
667         /* make sure basic rates 6Mbps and 1Mbps are supported */
668         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
669                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
670         if (error)
671                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
672
673         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
674         if (error)
675                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
676
677         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
678                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
679         if (error)
680                 IWL_WARNING("check CCK and short slot %d | %d\n",
681                             counter++, error);
682
683         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
684                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
685         if (error)
686                 IWL_WARNING("check CCK & auto detect %d | %d\n",
687                             counter++, error);
688
689         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
690                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
691         if (error)
692                 IWL_WARNING("check TGG and auto detect %d | %d\n",
693                             counter++, error);
694
695         if (error)
696                 IWL_WARNING("Tuning to channel %d\n",
697                             le16_to_cpu(rxon->channel));
698
699         if (error) {
700                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
701                 return -1;
702         }
703         return 0;
704 }
705
706 /**
707  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
708  * @priv: staging_rxon is compared to active_rxon
709  *
710  * If the RXON structure is changing enough to require a new tune,
711  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
712  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
713  */
714 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
715 {
716
717         /* These items are only settable from the full RXON command */
718         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
719             compare_ether_addr(priv->staging_rxon.bssid_addr,
720                                priv->active_rxon.bssid_addr) ||
721             compare_ether_addr(priv->staging_rxon.node_addr,
722                                priv->active_rxon.node_addr) ||
723             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
724                                priv->active_rxon.wlap_bssid_addr) ||
725             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
726             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
727             (priv->staging_rxon.air_propagation !=
728              priv->active_rxon.air_propagation) ||
729             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
730              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
731             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
732              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
733             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
734             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
735                 return 1;
736
737         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
738          * be updated with the RXON_ASSOC command -- however only some
739          * flag transitions are allowed using RXON_ASSOC */
740
741         /* Check if we are not switching bands */
742         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
743             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
744                 return 1;
745
746         /* Check if we are switching association toggle */
747         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
748                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
749                 return 1;
750
751         return 0;
752 }
753
754 /**
755  * iwl4965_commit_rxon - commit staging_rxon to hardware
756  *
757  * The RXON command in staging_rxon is committed to the hardware and
758  * the active_rxon structure is updated with the new data.  This
759  * function correctly transitions out of the RXON_ASSOC_MSK state if
760  * a HW tune is required based on the RXON structure changes.
761  */
762 static int iwl4965_commit_rxon(struct iwl_priv *priv)
763 {
764         /* cast away the const for active_rxon in this function */
765         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
766         DECLARE_MAC_BUF(mac);
767         int rc = 0;
768
769         if (!iwl_is_alive(priv))
770                 return -1;
771
772         /* always get timestamp with Rx frame */
773         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
774
775         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
776         if (rc) {
777                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
778                 return -EINVAL;
779         }
780
781         /* If we don't need to send a full RXON, we can use
782          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
783          * and other flags for the current radio configuration. */
784         if (!iwl4965_full_rxon_required(priv)) {
785                 rc = iwl_send_rxon_assoc(priv);
786                 if (rc) {
787                         IWL_ERROR("Error setting RXON_ASSOC "
788                                   "configuration (%d).\n", rc);
789                         return rc;
790                 }
791
792                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
793
794                 return 0;
795         }
796
797         /* station table will be cleared */
798         priv->assoc_station_added = 0;
799
800         /* If we are currently associated and the new config requires
801          * an RXON_ASSOC and the new config wants the associated mask enabled,
802          * we must clear the associated from the active configuration
803          * before we apply the new config */
804         if (iwl_is_associated(priv) &&
805             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
806                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
807                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
808
809                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
810                                       sizeof(struct iwl4965_rxon_cmd),
811                                       &priv->active_rxon);
812
813                 /* If the mask clearing failed then we set
814                  * active_rxon back to what it was previously */
815                 if (rc) {
816                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
817                         IWL_ERROR("Error clearing ASSOC_MSK on current "
818                                   "configuration (%d).\n", rc);
819                         return rc;
820                 }
821         }
822
823         IWL_DEBUG_INFO("Sending RXON\n"
824                        "* with%s RXON_FILTER_ASSOC_MSK\n"
825                        "* channel = %d\n"
826                        "* bssid = %s\n",
827                        ((priv->staging_rxon.filter_flags &
828                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
829                        le16_to_cpu(priv->staging_rxon.channel),
830                        print_mac(mac, priv->staging_rxon.bssid_addr));
831
832         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
833         /* Apply the new configuration */
834         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
835                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
836         if (rc) {
837                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
838                 return rc;
839         }
840
841         iwlcore_clear_stations_table(priv);
842
843         if (!priv->error_recovering)
844                 priv->start_calib = 0;
845
846         iwl_init_sensitivity(priv);
847
848         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
849
850         /* If we issue a new RXON command which required a tune then we must
851          * send a new TXPOWER command or we won't be able to Tx any frames */
852         rc = iwl4965_hw_reg_send_txpower(priv);
853         if (rc) {
854                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
855                 return rc;
856         }
857
858         /* Add the broadcast address so we can send broadcast frames */
859         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
860             IWL_INVALID_STATION) {
861                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
862                 return -EIO;
863         }
864
865         /* If we have set the ASSOC_MSK and we are in BSS mode then
866          * add the IWL_AP_ID to the station rate table */
867         if (iwl_is_associated(priv) &&
868             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
869                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
870                     == IWL_INVALID_STATION) {
871                         IWL_ERROR("Error adding AP address for transmit.\n");
872                         return -EIO;
873                 }
874                 priv->assoc_station_added = 1;
875                 if (priv->default_wep_key &&
876                     iwl_send_static_wepkey_cmd(priv, 0))
877                         IWL_ERROR("Could not send WEP static key.\n");
878         }
879
880         return 0;
881 }
882
883 void iwl4965_update_chain_flags(struct iwl_priv *priv)
884 {
885
886         iwl_set_rxon_chain(priv);
887         iwl4965_commit_rxon(priv);
888 }
889
890 static int iwl4965_send_bt_config(struct iwl_priv *priv)
891 {
892         struct iwl4965_bt_cmd bt_cmd = {
893                 .flags = 3,
894                 .lead_time = 0xAA,
895                 .max_kill = 1,
896                 .kill_ack_mask = 0,
897                 .kill_cts_mask = 0,
898         };
899
900         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
901                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
902 }
903
904 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
905 {
906         int ret = 0;
907         struct iwl_rx_packet *res;
908         struct iwl_host_cmd cmd = {
909                 .id = REPLY_SCAN_ABORT_CMD,
910                 .meta.flags = CMD_WANT_SKB,
911         };
912
913         /* If there isn't a scan actively going on in the hardware
914          * then we are in between scan bands and not actually
915          * actively scanning, so don't send the abort command */
916         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
917                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
918                 return 0;
919         }
920
921         ret = iwl_send_cmd_sync(priv, &cmd);
922         if (ret) {
923                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
924                 return ret;
925         }
926
927         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
928         if (res->u.status != CAN_ABORT_STATUS) {
929                 /* The scan abort will return 1 for success or
930                  * 2 for "failure".  A failure condition can be
931                  * due to simply not being in an active scan which
932                  * can occur if we send the scan abort before we
933                  * the microcode has notified us that a scan is
934                  * completed. */
935                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
936                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
937                 clear_bit(STATUS_SCAN_HW, &priv->status);
938         }
939
940         dev_kfree_skb_any(cmd.meta.u.skb);
941
942         return ret;
943 }
944
945 /*
946  * CARD_STATE_CMD
947  *
948  * Use: Sets the device's internal card state to enable, disable, or halt
949  *
950  * When in the 'enable' state the card operates as normal.
951  * When in the 'disable' state, the card enters into a low power mode.
952  * When in the 'halt' state, the card is shut down and must be fully
953  * restarted to come back on.
954  */
955 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
956 {
957         struct iwl_host_cmd cmd = {
958                 .id = REPLY_CARD_STATE_CMD,
959                 .len = sizeof(u32),
960                 .data = &flags,
961                 .meta.flags = meta_flag,
962         };
963
964         return iwl_send_cmd(priv, &cmd);
965 }
966
967 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
968 {
969         struct list_head *element;
970
971         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
972                        priv->frames_count);
973
974         while (!list_empty(&priv->free_frames)) {
975                 element = priv->free_frames.next;
976                 list_del(element);
977                 kfree(list_entry(element, struct iwl4965_frame, list));
978                 priv->frames_count--;
979         }
980
981         if (priv->frames_count) {
982                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
983                             priv->frames_count);
984                 priv->frames_count = 0;
985         }
986 }
987
988 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
989 {
990         struct iwl4965_frame *frame;
991         struct list_head *element;
992         if (list_empty(&priv->free_frames)) {
993                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
994                 if (!frame) {
995                         IWL_ERROR("Could not allocate frame!\n");
996                         return NULL;
997                 }
998
999                 priv->frames_count++;
1000                 return frame;
1001         }
1002
1003         element = priv->free_frames.next;
1004         list_del(element);
1005         return list_entry(element, struct iwl4965_frame, list);
1006 }
1007
1008 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1009 {
1010         memset(frame, 0, sizeof(*frame));
1011         list_add(&frame->list, &priv->free_frames);
1012 }
1013
1014 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1015                                 struct ieee80211_hdr *hdr,
1016                                 const u8 *dest, int left)
1017 {
1018
1019         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1020             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1021              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1022                 return 0;
1023
1024         if (priv->ibss_beacon->len > left)
1025                 return 0;
1026
1027         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1028
1029         return priv->ibss_beacon->len;
1030 }
1031
1032 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
1033 {
1034         int i;
1035         int rate_mask;
1036
1037         /* Set rate mask*/
1038         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1039                 rate_mask = priv->active_rate_basic & 0xF;
1040         else
1041                 rate_mask = priv->active_rate_basic & 0xFF0;
1042
1043         /* Find lowest valid rate */
1044         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1045                                         i = iwl4965_rates[i].next_ieee) {
1046                 if (rate_mask & (1 << i))
1047                         return iwl4965_rates[i].plcp;
1048         }
1049
1050         /* No valid rate was found. Assign the lowest one */
1051         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1052                 return IWL_RATE_1M_PLCP;
1053         else
1054                 return IWL_RATE_6M_PLCP;
1055 }
1056
1057 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1058 {
1059         struct iwl4965_frame *frame;
1060         unsigned int frame_size;
1061         int rc;
1062         u8 rate;
1063
1064         frame = iwl4965_get_free_frame(priv);
1065
1066         if (!frame) {
1067                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1068                           "command.\n");
1069                 return -ENOMEM;
1070         }
1071
1072         rate = iwl4965_rate_get_lowest_plcp(priv);
1073
1074         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1075
1076         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1077                               &frame->u.cmd[0]);
1078
1079         iwl4965_free_frame(priv, frame);
1080
1081         return rc;
1082 }
1083
1084 /******************************************************************************
1085  *
1086  * Misc. internal state and helper functions
1087  *
1088  ******************************************************************************/
1089
1090 /**
1091  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1092  *
1093  * return : set the bit for each supported rate insert in ie
1094  */
1095 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1096                                     u16 basic_rate, int *left)
1097 {
1098         u16 ret_rates = 0, bit;
1099         int i;
1100         u8 *cnt = ie;
1101         u8 *rates = ie + 1;
1102
1103         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1104                 if (bit & supported_rate) {
1105                         ret_rates |= bit;
1106                         rates[*cnt] = iwl4965_rates[i].ieee |
1107                                 ((bit & basic_rate) ? 0x80 : 0x00);
1108                         (*cnt)++;
1109                         (*left)--;
1110                         if ((*left <= 0) ||
1111                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1112                                 break;
1113                 }
1114         }
1115
1116         return ret_rates;
1117 }
1118
1119 #ifdef CONFIG_IWL4965_HT
1120 static void iwl4965_ht_conf(struct iwl_priv *priv,
1121                             struct ieee80211_bss_conf *bss_conf)
1122 {
1123         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1124         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1125         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1126
1127         IWL_DEBUG_MAC80211("enter: \n");
1128
1129         iwl_conf->is_ht = bss_conf->assoc_ht;
1130
1131         if (!iwl_conf->is_ht)
1132                 return;
1133
1134         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1135
1136         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1137                 iwl_conf->sgf |= 0x1;
1138         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1139                 iwl_conf->sgf |= 0x2;
1140
1141         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1142         iwl_conf->max_amsdu_size =
1143                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1144
1145         iwl_conf->supported_chan_width =
1146                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1147         iwl_conf->extension_chan_offset =
1148                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1149         /* If no above or below channel supplied disable FAT channel */
1150         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1151             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1152                 iwl_conf->supported_chan_width = 0;
1153
1154         iwl_conf->tx_mimo_ps_mode =
1155                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1156         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1157
1158         iwl_conf->control_channel = ht_bss_conf->primary_channel;
1159         iwl_conf->tx_chan_width =
1160                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1161         iwl_conf->ht_protection =
1162                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1163         iwl_conf->non_GF_STA_present =
1164                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1165
1166         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1167         IWL_DEBUG_MAC80211("leave\n");
1168 }
1169
1170 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1171                         u8 *pos, int *left)
1172 {
1173         struct ieee80211_ht_cap *ht_cap;
1174
1175         if (!sband || !sband->ht_info.ht_supported)
1176                 return;
1177
1178         if (*left < sizeof(struct ieee80211_ht_cap))
1179                 return;
1180
1181         *pos++ = sizeof(struct ieee80211_ht_cap);
1182         ht_cap = (struct ieee80211_ht_cap *) pos;
1183
1184         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1185         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1186         ht_cap->ampdu_params_info =
1187                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1188                 ((sband->ht_info.ampdu_density << 2) &
1189                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1190         *left -= sizeof(struct ieee80211_ht_cap);
1191 }
1192 #else
1193 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1194                                    struct ieee80211_bss_conf *bss_conf)
1195 {
1196 }
1197 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1198                         u8 *pos, int *left)
1199 {
1200 }
1201 #endif
1202
1203
1204 /**
1205  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1206  */
1207 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1208                                   enum ieee80211_band band,
1209                                   struct ieee80211_mgmt *frame,
1210                                   int left, int is_direct)
1211 {
1212         int len = 0;
1213         u8 *pos = NULL;
1214         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1215         const struct ieee80211_supported_band *sband =
1216                                                 iwl_get_hw_mode(priv, band);
1217
1218         /* Make sure there is enough space for the probe request,
1219          * two mandatory IEs and the data */
1220         left -= 24;
1221         if (left < 0)
1222                 return 0;
1223         len += 24;
1224
1225         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1226         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1227         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1228         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1229         frame->seq_ctrl = 0;
1230
1231         /* fill in our indirect SSID IE */
1232         /* ...next IE... */
1233
1234         left -= 2;
1235         if (left < 0)
1236                 return 0;
1237         len += 2;
1238         pos = &(frame->u.probe_req.variable[0]);
1239         *pos++ = WLAN_EID_SSID;
1240         *pos++ = 0;
1241
1242         /* fill in our direct SSID IE... */
1243         if (is_direct) {
1244                 /* ...next IE... */
1245                 left -= 2 + priv->essid_len;
1246                 if (left < 0)
1247                         return 0;
1248                 /* ... fill it in... */
1249                 *pos++ = WLAN_EID_SSID;
1250                 *pos++ = priv->essid_len;
1251                 memcpy(pos, priv->essid, priv->essid_len);
1252                 pos += priv->essid_len;
1253                 len += 2 + priv->essid_len;
1254         }
1255
1256         /* fill in supported rate */
1257         /* ...next IE... */
1258         left -= 2;
1259         if (left < 0)
1260                 return 0;
1261
1262         /* ... fill it in... */
1263         *pos++ = WLAN_EID_SUPP_RATES;
1264         *pos = 0;
1265
1266         /* exclude 60M rate */
1267         active_rates = priv->rates_mask;
1268         active_rates &= ~IWL_RATE_60M_MASK;
1269
1270         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1271
1272         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1273         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1274                         active_rate_basic, &left);
1275         active_rates &= ~ret_rates;
1276
1277         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1278                                  active_rate_basic, &left);
1279         active_rates &= ~ret_rates;
1280
1281         len += 2 + *pos;
1282         pos += (*pos) + 1;
1283         if (active_rates == 0)
1284                 goto fill_end;
1285
1286         /* fill in supported extended rate */
1287         /* ...next IE... */
1288         left -= 2;
1289         if (left < 0)
1290                 return 0;
1291         /* ... fill it in... */
1292         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1293         *pos = 0;
1294         iwl4965_supported_rate_to_ie(pos, active_rates,
1295                                  active_rate_basic, &left);
1296         if (*pos > 0)
1297                 len += 2 + *pos;
1298
1299  fill_end:
1300         /* fill in HT IE */
1301         left -= 2;
1302         if (left < 0)
1303                 return 0;
1304
1305         *pos++ = WLAN_EID_HT_CAPABILITY;
1306         *pos = 0;
1307
1308         iwl_ht_cap_to_ie(sband, pos, &left);
1309
1310         if (*pos > 0)
1311                 len += 2 + *pos;
1312         return (u16)len;
1313 }
1314
1315 /*
1316  * QoS  support
1317 */
1318 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1319                                        struct iwl4965_qosparam_cmd *qos)
1320 {
1321
1322         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1323                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1324 }
1325
1326 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1327 {
1328         unsigned long flags;
1329
1330         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1331                 return;
1332
1333         if (!priv->qos_data.qos_enable)
1334                 return;
1335
1336         spin_lock_irqsave(&priv->lock, flags);
1337         priv->qos_data.def_qos_parm.qos_flags = 0;
1338
1339         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1340             !priv->qos_data.qos_cap.q_AP.txop_request)
1341                 priv->qos_data.def_qos_parm.qos_flags |=
1342                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1343         if (priv->qos_data.qos_active)
1344                 priv->qos_data.def_qos_parm.qos_flags |=
1345                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1346
1347 #ifdef CONFIG_IWL4965_HT
1348         if (priv->current_ht_config.is_ht)
1349                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1350 #endif /* CONFIG_IWL4965_HT */
1351
1352         spin_unlock_irqrestore(&priv->lock, flags);
1353
1354         if (force || iwl_is_associated(priv)) {
1355                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1356                                 priv->qos_data.qos_active,
1357                                 priv->qos_data.def_qos_parm.qos_flags);
1358
1359                 iwl4965_send_qos_params_command(priv,
1360                                 &(priv->qos_data.def_qos_parm));
1361         }
1362 }
1363
1364 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1365 {
1366         /* Filter incoming packets to determine if they are targeted toward
1367          * this network, discarding packets coming from ourselves */
1368         switch (priv->iw_mode) {
1369         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1370                 /* packets from our adapter are dropped (echo) */
1371                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1372                         return 0;
1373                 /* {broad,multi}cast packets to our IBSS go through */
1374                 if (is_multicast_ether_addr(header->addr1))
1375                         return !compare_ether_addr(header->addr3, priv->bssid);
1376                 /* packets to our adapter go through */
1377                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1378         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1379                 /* packets from our adapter are dropped (echo) */
1380                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1381                         return 0;
1382                 /* {broad,multi}cast packets to our BSS go through */
1383                 if (is_multicast_ether_addr(header->addr1))
1384                         return !compare_ether_addr(header->addr2, priv->bssid);
1385                 /* packets to our adapter go through */
1386                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1387         default:
1388                 break;
1389         }
1390
1391         return 1;
1392 }
1393
1394 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1395
1396 static const char *iwl4965_get_tx_fail_reason(u32 status)
1397 {
1398         switch (status & TX_STATUS_MSK) {
1399         case TX_STATUS_SUCCESS:
1400                 return "SUCCESS";
1401                 TX_STATUS_ENTRY(SHORT_LIMIT);
1402                 TX_STATUS_ENTRY(LONG_LIMIT);
1403                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1404                 TX_STATUS_ENTRY(MGMNT_ABORT);
1405                 TX_STATUS_ENTRY(NEXT_FRAG);
1406                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1407                 TX_STATUS_ENTRY(DEST_PS);
1408                 TX_STATUS_ENTRY(ABORTED);
1409                 TX_STATUS_ENTRY(BT_RETRY);
1410                 TX_STATUS_ENTRY(STA_INVALID);
1411                 TX_STATUS_ENTRY(FRAG_DROPPED);
1412                 TX_STATUS_ENTRY(TID_DISABLE);
1413                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1414                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1415                 TX_STATUS_ENTRY(TX_LOCKED);
1416                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1417         }
1418
1419         return "UNKNOWN";
1420 }
1421
1422 /**
1423  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1424  *
1425  * NOTE: priv->mutex is not required before calling this function
1426  */
1427 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1428 {
1429         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1430                 clear_bit(STATUS_SCANNING, &priv->status);
1431                 return 0;
1432         }
1433
1434         if (test_bit(STATUS_SCANNING, &priv->status)) {
1435                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1436                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1437                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1438                         queue_work(priv->workqueue, &priv->abort_scan);
1439
1440                 } else
1441                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1442
1443                 return test_bit(STATUS_SCANNING, &priv->status);
1444         }
1445
1446         return 0;
1447 }
1448
1449 /**
1450  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1451  * @ms: amount of time to wait (in milliseconds) for scan to abort
1452  *
1453  * NOTE: priv->mutex must be held before calling this function
1454  */
1455 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1456 {
1457         unsigned long now = jiffies;
1458         int ret;
1459
1460         ret = iwl4965_scan_cancel(priv);
1461         if (ret && ms) {
1462                 mutex_unlock(&priv->mutex);
1463                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1464                                 test_bit(STATUS_SCANNING, &priv->status))
1465                         msleep(1);
1466                 mutex_lock(&priv->mutex);
1467
1468                 return test_bit(STATUS_SCANNING, &priv->status);
1469         }
1470
1471         return ret;
1472 }
1473
1474 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1475 {
1476         /* Reset ieee stats */
1477
1478         /* We don't reset the net_device_stats (ieee->stats) on
1479          * re-association */
1480
1481         priv->last_seq_num = -1;
1482         priv->last_frag_num = -1;
1483         priv->last_packet_time = 0;
1484
1485         iwl4965_scan_cancel(priv);
1486 }
1487
1488 #define MAX_UCODE_BEACON_INTERVAL       4096
1489 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1490
1491 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1492 {
1493         u16 new_val = 0;
1494         u16 beacon_factor = 0;
1495
1496         beacon_factor =
1497             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1498                 / MAX_UCODE_BEACON_INTERVAL;
1499         new_val = beacon_val / beacon_factor;
1500
1501         return cpu_to_le16(new_val);
1502 }
1503
1504 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1505 {
1506         u64 interval_tm_unit;
1507         u64 tsf, result;
1508         unsigned long flags;
1509         struct ieee80211_conf *conf = NULL;
1510         u16 beacon_int = 0;
1511
1512         conf = ieee80211_get_hw_conf(priv->hw);
1513
1514         spin_lock_irqsave(&priv->lock, flags);
1515         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1516         priv->rxon_timing.timestamp.dw[0] =
1517                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1518
1519         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1520
1521         tsf = priv->timestamp;
1522
1523         beacon_int = priv->beacon_int;
1524         spin_unlock_irqrestore(&priv->lock, flags);
1525
1526         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1527                 if (beacon_int == 0) {
1528                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1529                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1530                 } else {
1531                         priv->rxon_timing.beacon_interval =
1532                                 cpu_to_le16(beacon_int);
1533                         priv->rxon_timing.beacon_interval =
1534                             iwl4965_adjust_beacon_interval(
1535                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1536                 }
1537
1538                 priv->rxon_timing.atim_window = 0;
1539         } else {
1540                 priv->rxon_timing.beacon_interval =
1541                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1542                 /* TODO: we need to get atim_window from upper stack
1543                  * for now we set to 0 */
1544                 priv->rxon_timing.atim_window = 0;
1545         }
1546
1547         interval_tm_unit =
1548                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1549         result = do_div(tsf, interval_tm_unit);
1550         priv->rxon_timing.beacon_init_val =
1551             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1552
1553         IWL_DEBUG_ASSOC
1554             ("beacon interval %d beacon timer %d beacon tim %d\n",
1555                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1556                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1557                 le16_to_cpu(priv->rxon_timing.atim_window));
1558 }
1559
1560 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1561 {
1562         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1563                 IWL_ERROR("APs don't scan.\n");
1564                 return 0;
1565         }
1566
1567         if (!iwl_is_ready_rf(priv)) {
1568                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1569                 return -EIO;
1570         }
1571
1572         if (test_bit(STATUS_SCANNING, &priv->status)) {
1573                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1574                 return -EAGAIN;
1575         }
1576
1577         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1578                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1579                                "Queuing.\n");
1580                 return -EAGAIN;
1581         }
1582
1583         IWL_DEBUG_INFO("Starting scan...\n");
1584         priv->scan_bands = 2;
1585         set_bit(STATUS_SCANNING, &priv->status);
1586         priv->scan_start = jiffies;
1587         priv->scan_pass_start = priv->scan_start;
1588
1589         queue_work(priv->workqueue, &priv->request_scan);
1590
1591         return 0;
1592 }
1593
1594
1595 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1596                                           enum ieee80211_band band)
1597 {
1598         if (band == IEEE80211_BAND_5GHZ) {
1599                 priv->staging_rxon.flags &=
1600                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1601                       | RXON_FLG_CCK_MSK);
1602                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1603         } else {
1604                 /* Copied from iwl4965_post_associate() */
1605                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1606                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1607                 else
1608                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1609
1610                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1611                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1612
1613                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1614                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1615                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1616         }
1617 }
1618
1619 /*
1620  * initialize rxon structure with default values from eeprom
1621  */
1622 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1623 {
1624         const struct iwl_channel_info *ch_info;
1625
1626         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1627
1628         switch (priv->iw_mode) {
1629         case IEEE80211_IF_TYPE_AP:
1630                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1631                 break;
1632
1633         case IEEE80211_IF_TYPE_STA:
1634                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1635                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1636                 break;
1637
1638         case IEEE80211_IF_TYPE_IBSS:
1639                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1640                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1641                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1642                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1643                 break;
1644
1645         case IEEE80211_IF_TYPE_MNTR:
1646                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1647                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1648                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1649                 break;
1650         default:
1651                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1652                 break;
1653         }
1654
1655 #if 0
1656         /* TODO:  Figure out when short_preamble would be set and cache from
1657          * that */
1658         if (!hw_to_local(priv->hw)->short_preamble)
1659                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1660         else
1661                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1662 #endif
1663
1664         ch_info = iwl_get_channel_info(priv, priv->band,
1665                                        le16_to_cpu(priv->staging_rxon.channel));
1666
1667         if (!ch_info)
1668                 ch_info = &priv->channel_info[0];
1669
1670         /*
1671          * in some case A channels are all non IBSS
1672          * in this case force B/G channel
1673          */
1674         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1675             !(is_channel_ibss(ch_info)))
1676                 ch_info = &priv->channel_info[0];
1677
1678         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1679         priv->band = ch_info->band;
1680
1681         iwl4965_set_flags_for_phymode(priv, priv->band);
1682
1683         priv->staging_rxon.ofdm_basic_rates =
1684             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1685         priv->staging_rxon.cck_basic_rates =
1686             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1687
1688         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1689                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1690         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1691         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1692         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1693         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1694         iwl_set_rxon_chain(priv);
1695 }
1696
1697 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1698 {
1699         if (mode == IEEE80211_IF_TYPE_IBSS) {
1700                 const struct iwl_channel_info *ch_info;
1701
1702                 ch_info = iwl_get_channel_info(priv,
1703                         priv->band,
1704                         le16_to_cpu(priv->staging_rxon.channel));
1705
1706                 if (!ch_info || !is_channel_ibss(ch_info)) {
1707                         IWL_ERROR("channel %d not IBSS channel\n",
1708                                   le16_to_cpu(priv->staging_rxon.channel));
1709                         return -EINVAL;
1710                 }
1711         }
1712
1713         priv->iw_mode = mode;
1714
1715         iwl4965_connection_init_rx_config(priv);
1716         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1717
1718         iwlcore_clear_stations_table(priv);
1719
1720         /* dont commit rxon if rf-kill is on*/
1721         if (!iwl_is_ready_rf(priv))
1722                 return -EAGAIN;
1723
1724         cancel_delayed_work(&priv->scan_check);
1725         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1726                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1727                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1728                 return -EAGAIN;
1729         }
1730
1731         iwl4965_commit_rxon(priv);
1732
1733         return 0;
1734 }
1735
1736 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1737                                       struct ieee80211_tx_control *ctl,
1738                                       struct iwl_cmd *cmd,
1739                                       struct sk_buff *skb_frag,
1740                                       int sta_id)
1741 {
1742         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1743         struct iwl_wep_key *wepkey;
1744         int keyidx = 0;
1745
1746         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1747
1748         switch (keyinfo->alg) {
1749         case ALG_CCMP:
1750                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1751                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1752                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1753                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1754                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1755                 break;
1756
1757         case ALG_TKIP:
1758                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1759                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1760                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1761                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1762                 break;
1763
1764         case ALG_WEP:
1765                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1766                 cmd->cmd.tx.sec_ctl = 0;
1767                 if (priv->default_wep_key) {
1768                         /* the WEP key was sent as static */
1769                         keyidx = ctl->hw_key->hw_key_idx;
1770                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1771                                                         wepkey->key_size);
1772                         if (wepkey->key_size == WEP_KEY_LEN_128)
1773                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1774                 } else {
1775                         /* the WEP key was sent as dynamic */
1776                         keyidx = keyinfo->keyidx;
1777                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1778                                                         keyinfo->keylen);
1779                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1780                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1781                 }
1782
1783                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1784                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1785
1786                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1787                              "with key %d\n", keyidx);
1788                 break;
1789
1790         default:
1791                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1792                 break;
1793         }
1794 }
1795
1796 /*
1797  * handle build REPLY_TX command notification.
1798  */
1799 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1800                                   struct iwl_cmd *cmd,
1801                                   struct ieee80211_tx_control *ctrl,
1802                                   struct ieee80211_hdr *hdr,
1803                                   int is_unicast, u8 std_id)
1804 {
1805         __le16 *qc;
1806         u16 fc = le16_to_cpu(hdr->frame_control);
1807         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1808
1809         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1810         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1811                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1812                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1813                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1814                 if (ieee80211_is_probe_response(fc) &&
1815                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1816                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1817         } else {
1818                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1819                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1820         }
1821
1822         if (ieee80211_is_back_request(fc))
1823                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1824
1825
1826         cmd->cmd.tx.sta_id = std_id;
1827         if (ieee80211_get_morefrag(hdr))
1828                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1829
1830         qc = ieee80211_get_qos_ctrl(hdr);
1831         if (qc) {
1832                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1833                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1834         } else
1835                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1836
1837         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1838                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1839                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1840         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1841                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1842                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1843         }
1844
1845         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1846                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1847
1848         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1849         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1850                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1851                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1852                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1853                 else
1854                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1855         } else {
1856                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1857         }
1858
1859         cmd->cmd.tx.driver_txop = 0;
1860         cmd->cmd.tx.tx_flags = tx_flags;
1861         cmd->cmd.tx.next_frame_len = 0;
1862 }
1863 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1864 {
1865         /* 0 - mgmt, 1 - cnt, 2 - data */
1866         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1867         priv->tx_stats[idx].cnt++;
1868         priv->tx_stats[idx].bytes += len;
1869 }
1870 /**
1871  * iwl4965_get_sta_id - Find station's index within station table
1872  *
1873  * If new IBSS station, create new entry in station table
1874  */
1875 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1876                                 struct ieee80211_hdr *hdr)
1877 {
1878         int sta_id;
1879         u16 fc = le16_to_cpu(hdr->frame_control);
1880         DECLARE_MAC_BUF(mac);
1881
1882         /* If this frame is broadcast or management, use broadcast station id */
1883         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1884             is_multicast_ether_addr(hdr->addr1))
1885                 return priv->hw_params.bcast_sta_id;
1886
1887         switch (priv->iw_mode) {
1888
1889         /* If we are a client station in a BSS network, use the special
1890          * AP station entry (that's the only station we communicate with) */
1891         case IEEE80211_IF_TYPE_STA:
1892                 return IWL_AP_ID;
1893
1894         /* If we are an AP, then find the station, or use BCAST */
1895         case IEEE80211_IF_TYPE_AP:
1896                 sta_id = iwl_find_station(priv, hdr->addr1);
1897                 if (sta_id != IWL_INVALID_STATION)
1898                         return sta_id;
1899                 return priv->hw_params.bcast_sta_id;
1900
1901         /* If this frame is going out to an IBSS network, find the station,
1902          * or create a new station table entry */
1903         case IEEE80211_IF_TYPE_IBSS:
1904                 sta_id = iwl_find_station(priv, hdr->addr1);
1905                 if (sta_id != IWL_INVALID_STATION)
1906                         return sta_id;
1907
1908                 /* Create new station table entry */
1909                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1910                                                    0, CMD_ASYNC, NULL);
1911
1912                 if (sta_id != IWL_INVALID_STATION)
1913                         return sta_id;
1914
1915                 IWL_DEBUG_DROP("Station %s not in station map. "
1916                                "Defaulting to broadcast...\n",
1917                                print_mac(mac, hdr->addr1));
1918                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1919                 return priv->hw_params.bcast_sta_id;
1920
1921         default:
1922                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1923                 return priv->hw_params.bcast_sta_id;
1924         }
1925 }
1926
1927 /*
1928  * start REPLY_TX command process
1929  */
1930 static int iwl4965_tx_skb(struct iwl_priv *priv,
1931                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1932 {
1933         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1934         struct iwl4965_tfd_frame *tfd;
1935         u32 *control_flags;
1936         int txq_id = ctl->queue;
1937         struct iwl4965_tx_queue *txq = NULL;
1938         struct iwl4965_queue *q = NULL;
1939         dma_addr_t phys_addr;
1940         dma_addr_t txcmd_phys;
1941         dma_addr_t scratch_phys;
1942         struct iwl_cmd *out_cmd = NULL;
1943         u16 len, idx, len_org;
1944         u8 id, hdr_len, unicast;
1945         u8 sta_id;
1946         u16 seq_number = 0;
1947         u16 fc;
1948         __le16 *qc;
1949         u8 wait_write_ptr = 0;
1950         unsigned long flags;
1951         int rc;
1952
1953         spin_lock_irqsave(&priv->lock, flags);
1954         if (iwl_is_rfkill(priv)) {
1955                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1956                 goto drop_unlock;
1957         }
1958
1959         if (!priv->vif) {
1960                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
1961                 goto drop_unlock;
1962         }
1963
1964         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
1965                 IWL_ERROR("ERROR: No TX rate available.\n");
1966                 goto drop_unlock;
1967         }
1968
1969         unicast = !is_multicast_ether_addr(hdr->addr1);
1970         id = 0;
1971
1972         fc = le16_to_cpu(hdr->frame_control);
1973
1974 #ifdef CONFIG_IWLWIFI_DEBUG
1975         if (ieee80211_is_auth(fc))
1976                 IWL_DEBUG_TX("Sending AUTH frame\n");
1977         else if (ieee80211_is_assoc_request(fc))
1978                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1979         else if (ieee80211_is_reassoc_request(fc))
1980                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1981 #endif
1982
1983         /* drop all data frame if we are not associated */
1984         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
1985            (!iwl_is_associated(priv) ||
1986             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
1987             !priv->assoc_station_added)) {
1988                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
1989                 goto drop_unlock;
1990         }
1991
1992         spin_unlock_irqrestore(&priv->lock, flags);
1993
1994         hdr_len = ieee80211_get_hdrlen(fc);
1995
1996         /* Find (or create) index into station table for destination station */
1997         sta_id = iwl4965_get_sta_id(priv, hdr);
1998         if (sta_id == IWL_INVALID_STATION) {
1999                 DECLARE_MAC_BUF(mac);
2000
2001                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2002                                print_mac(mac, hdr->addr1));
2003                 goto drop;
2004         }
2005
2006         IWL_DEBUG_TX("station Id %d\n", sta_id);
2007
2008         qc = ieee80211_get_qos_ctrl(hdr);
2009         if (qc) {
2010                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2011                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2012                                 IEEE80211_SCTL_SEQ;
2013                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2014                         (hdr->seq_ctrl &
2015                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2016                 seq_number += 0x10;
2017 #ifdef CONFIG_IWL4965_HT
2018                 /* aggregation is on for this <sta,tid> */
2019                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2020                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2021                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2022 #endif /* CONFIG_IWL4965_HT */
2023         }
2024
2025         /* Descriptor for chosen Tx queue */
2026         txq = &priv->txq[txq_id];
2027         q = &txq->q;
2028
2029         spin_lock_irqsave(&priv->lock, flags);
2030
2031         /* Set up first empty TFD within this queue's circular TFD buffer */
2032         tfd = &txq->bd[q->write_ptr];
2033         memset(tfd, 0, sizeof(*tfd));
2034         control_flags = (u32 *) tfd;
2035         idx = get_cmd_index(q, q->write_ptr, 0);
2036
2037         /* Set up driver data for this TFD */
2038         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2039         txq->txb[q->write_ptr].skb[0] = skb;
2040         memcpy(&(txq->txb[q->write_ptr].status.control),
2041                ctl, sizeof(struct ieee80211_tx_control));
2042
2043         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2044         out_cmd = &txq->cmd[idx];
2045         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2046         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2047
2048         /*
2049          * Set up the Tx-command (not MAC!) header.
2050          * Store the chosen Tx queue and TFD index within the sequence field;
2051          * after Tx, uCode's Tx response will return this value so driver can
2052          * locate the frame within the tx queue and do post-tx processing.
2053          */
2054         out_cmd->hdr.cmd = REPLY_TX;
2055         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2056                                 INDEX_TO_SEQ(q->write_ptr)));
2057
2058         /* Copy MAC header from skb into command buffer */
2059         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2060
2061         /*
2062          * Use the first empty entry in this queue's command buffer array
2063          * to contain the Tx command and MAC header concatenated together
2064          * (payload data will be in another buffer).
2065          * Size of this varies, due to varying MAC header length.
2066          * If end is not dword aligned, we'll have 2 extra bytes at the end
2067          * of the MAC header (device reads on dword boundaries).
2068          * We'll tell device about this padding later.
2069          */
2070         len = priv->hw_params.tx_cmd_len +
2071                 sizeof(struct iwl_cmd_header) + hdr_len;
2072
2073         len_org = len;
2074         len = (len + 3) & ~3;
2075
2076         if (len_org != len)
2077                 len_org = 1;
2078         else
2079                 len_org = 0;
2080
2081         /* Physical address of this Tx command's header (not MAC header!),
2082          * within command buffer array. */
2083         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2084                      offsetof(struct iwl_cmd, hdr);
2085
2086         /* Add buffer containing Tx command and MAC(!) header to TFD's
2087          * first entry */
2088         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2089
2090         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2091                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2092
2093         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2094          * if any (802.11 null frames have no payload). */
2095         len = skb->len - hdr_len;
2096         if (len) {
2097                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2098                                            len, PCI_DMA_TODEVICE);
2099                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2100         }
2101
2102         /* Tell 4965 about any 2-byte padding after MAC header */
2103         if (len_org)
2104                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2105
2106         /* Total # bytes to be transmitted */
2107         len = (u16)skb->len;
2108         out_cmd->cmd.tx.len = cpu_to_le16(len);
2109
2110         /* TODO need this for burst mode later on */
2111         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2112
2113         /* set is_hcca to 0; it probably will never be implemented */
2114         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2115
2116         iwl_update_tx_stats(priv, fc, len);
2117
2118         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2119                 offsetof(struct iwl4965_tx_cmd, scratch);
2120         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2121         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2122
2123         if (!ieee80211_get_morefrag(hdr)) {
2124                 txq->need_update = 1;
2125                 if (qc) {
2126                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2127                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2128                 }
2129         } else {
2130                 wait_write_ptr = 1;
2131                 txq->need_update = 0;
2132         }
2133
2134         iwl_print_hex_dump(priv, IWL_DL_TX, out_cmd->cmd.payload,
2135                            sizeof(out_cmd->cmd.tx));
2136
2137         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2138                            ieee80211_get_hdrlen(fc));
2139
2140         /* Set up entry for this TFD in Tx byte-count array */
2141         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2142
2143         /* Tell device the write index *just past* this latest filled TFD */
2144         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2145         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2146         spin_unlock_irqrestore(&priv->lock, flags);
2147
2148         if (rc)
2149                 return rc;
2150
2151         if ((iwl4965_queue_space(q) < q->high_mark)
2152             && priv->mac80211_registered) {
2153                 if (wait_write_ptr) {
2154                         spin_lock_irqsave(&priv->lock, flags);
2155                         txq->need_update = 1;
2156                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2157                         spin_unlock_irqrestore(&priv->lock, flags);
2158                 }
2159
2160                 ieee80211_stop_queue(priv->hw, ctl->queue);
2161         }
2162
2163         return 0;
2164
2165 drop_unlock:
2166         spin_unlock_irqrestore(&priv->lock, flags);
2167 drop:
2168         return -1;
2169 }
2170
2171 static void iwl4965_set_rate(struct iwl_priv *priv)
2172 {
2173         const struct ieee80211_supported_band *hw = NULL;
2174         struct ieee80211_rate *rate;
2175         int i;
2176
2177         hw = iwl_get_hw_mode(priv, priv->band);
2178         if (!hw) {
2179                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2180                 return;
2181         }
2182
2183         priv->active_rate = 0;
2184         priv->active_rate_basic = 0;
2185
2186         for (i = 0; i < hw->n_bitrates; i++) {
2187                 rate = &(hw->bitrates[i]);
2188                 if (rate->hw_value < IWL_RATE_COUNT)
2189                         priv->active_rate |= (1 << rate->hw_value);
2190         }
2191
2192         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2193                        priv->active_rate, priv->active_rate_basic);
2194
2195         /*
2196          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2197          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2198          * OFDM
2199          */
2200         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2201                 priv->staging_rxon.cck_basic_rates =
2202                     ((priv->active_rate_basic &
2203                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2204         else
2205                 priv->staging_rxon.cck_basic_rates =
2206                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2207
2208         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2209                 priv->staging_rxon.ofdm_basic_rates =
2210                     ((priv->active_rate_basic &
2211                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2212                       IWL_FIRST_OFDM_RATE) & 0xFF;
2213         else
2214                 priv->staging_rxon.ofdm_basic_rates =
2215                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2216 }
2217
2218 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2219 {
2220         unsigned long flags;
2221
2222         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2223                 return;
2224
2225         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2226                           disable_radio ? "OFF" : "ON");
2227
2228         if (disable_radio) {
2229                 iwl4965_scan_cancel(priv);
2230                 /* FIXME: This is a workaround for AP */
2231                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2232                         spin_lock_irqsave(&priv->lock, flags);
2233                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2234                                     CSR_UCODE_SW_BIT_RFKILL);
2235                         spin_unlock_irqrestore(&priv->lock, flags);
2236                         /* call the host command only if no hw rf-kill set */
2237                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2238                             iwl_is_ready(priv))
2239                                 iwl4965_send_card_state(priv,
2240                                                         CARD_STATE_CMD_DISABLE,
2241                                                         0);
2242                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2243
2244                         /* make sure mac80211 stop sending Tx frame */
2245                         if (priv->mac80211_registered)
2246                                 ieee80211_stop_queues(priv->hw);
2247                 }
2248                 return;
2249         }
2250
2251         spin_lock_irqsave(&priv->lock, flags);
2252         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2253
2254         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2255         spin_unlock_irqrestore(&priv->lock, flags);
2256
2257         /* wake up ucode */
2258         msleep(10);
2259
2260         spin_lock_irqsave(&priv->lock, flags);
2261         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2262         if (!iwl_grab_nic_access(priv))
2263                 iwl_release_nic_access(priv);
2264         spin_unlock_irqrestore(&priv->lock, flags);
2265
2266         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2267                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2268                                   "disabled by HW switch\n");
2269                 return;
2270         }
2271
2272         queue_work(priv->workqueue, &priv->restart);
2273         return;
2274 }
2275
2276 #define IWL_PACKET_RETRY_TIME HZ
2277
2278 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2279 {
2280         u16 sc = le16_to_cpu(header->seq_ctrl);
2281         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2282         u16 frag = sc & IEEE80211_SCTL_FRAG;
2283         u16 *last_seq, *last_frag;
2284         unsigned long *last_time;
2285
2286         switch (priv->iw_mode) {
2287         case IEEE80211_IF_TYPE_IBSS:{
2288                 struct list_head *p;
2289                 struct iwl4965_ibss_seq *entry = NULL;
2290                 u8 *mac = header->addr2;
2291                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2292
2293                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2294                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2295                         if (!compare_ether_addr(entry->mac, mac))
2296                                 break;
2297                 }
2298                 if (p == &priv->ibss_mac_hash[index]) {
2299                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2300                         if (!entry) {
2301                                 IWL_ERROR("Cannot malloc new mac entry\n");
2302                                 return 0;
2303                         }
2304                         memcpy(entry->mac, mac, ETH_ALEN);
2305                         entry->seq_num = seq;
2306                         entry->frag_num = frag;
2307                         entry->packet_time = jiffies;
2308                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2309                         return 0;
2310                 }
2311                 last_seq = &entry->seq_num;
2312                 last_frag = &entry->frag_num;
2313                 last_time = &entry->packet_time;
2314                 break;
2315         }
2316         case IEEE80211_IF_TYPE_STA:
2317                 last_seq = &priv->last_seq_num;
2318                 last_frag = &priv->last_frag_num;
2319                 last_time = &priv->last_packet_time;
2320                 break;
2321         default:
2322                 return 0;
2323         }
2324         if ((*last_seq == seq) &&
2325             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2326                 if (*last_frag == frag)
2327                         goto drop;
2328                 if (*last_frag + 1 != frag)
2329                         /* out-of-order fragment */
2330                         goto drop;
2331         } else
2332                 *last_seq = seq;
2333
2334         *last_frag = frag;
2335         *last_time = jiffies;
2336         return 0;
2337
2338  drop:
2339         return 1;
2340 }
2341
2342 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2343
2344 #include "iwl-spectrum.h"
2345
2346 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2347 #define BEACON_TIME_MASK_HIGH   0xFF000000
2348 #define TIME_UNIT               1024
2349
2350 /*
2351  * extended beacon time format
2352  * time in usec will be changed into a 32-bit value in 8:24 format
2353  * the high 1 byte is the beacon counts
2354  * the lower 3 bytes is the time in usec within one beacon interval
2355  */
2356
2357 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2358 {
2359         u32 quot;
2360         u32 rem;
2361         u32 interval = beacon_interval * 1024;
2362
2363         if (!interval || !usec)
2364                 return 0;
2365
2366         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2367         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2368
2369         return (quot << 24) + rem;
2370 }
2371
2372 /* base is usually what we get from ucode with each received frame,
2373  * the same as HW timer counter counting down
2374  */
2375
2376 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2377 {
2378         u32 base_low = base & BEACON_TIME_MASK_LOW;
2379         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2380         u32 interval = beacon_interval * TIME_UNIT;
2381         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2382             (addon & BEACON_TIME_MASK_HIGH);
2383
2384         if (base_low > addon_low)
2385                 res += base_low - addon_low;
2386         else if (base_low < addon_low) {
2387                 res += interval + base_low - addon_low;
2388                 res += (1 << 24);
2389         } else
2390                 res += (1 << 24);
2391
2392         return cpu_to_le32(res);
2393 }
2394
2395 static int iwl4965_get_measurement(struct iwl_priv *priv,
2396                                struct ieee80211_measurement_params *params,
2397                                u8 type)
2398 {
2399         struct iwl4965_spectrum_cmd spectrum;
2400         struct iwl_rx_packet *res;
2401         struct iwl_host_cmd cmd = {
2402                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2403                 .data = (void *)&spectrum,
2404                 .meta.flags = CMD_WANT_SKB,
2405         };
2406         u32 add_time = le64_to_cpu(params->start_time);
2407         int rc;
2408         int spectrum_resp_status;
2409         int duration = le16_to_cpu(params->duration);
2410
2411         if (iwl_is_associated(priv))
2412                 add_time =
2413                     iwl4965_usecs_to_beacons(
2414                         le64_to_cpu(params->start_time) - priv->last_tsf,
2415                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2416
2417         memset(&spectrum, 0, sizeof(spectrum));
2418
2419         spectrum.channel_count = cpu_to_le16(1);
2420         spectrum.flags =
2421             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2422         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2423         cmd.len = sizeof(spectrum);
2424         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2425
2426         if (iwl_is_associated(priv))
2427                 spectrum.start_time =
2428                     iwl4965_add_beacon_time(priv->last_beacon_time,
2429                                 add_time,
2430                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2431         else
2432                 spectrum.start_time = 0;
2433
2434         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2435         spectrum.channels[0].channel = params->channel;
2436         spectrum.channels[0].type = type;
2437         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2438                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2439                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2440
2441         rc = iwl_send_cmd_sync(priv, &cmd);
2442         if (rc)
2443                 return rc;
2444
2445         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2446         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2447                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2448                 rc = -EIO;
2449         }
2450
2451         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2452         switch (spectrum_resp_status) {
2453         case 0:         /* Command will be handled */
2454                 if (res->u.spectrum.id != 0xff) {
2455                         IWL_DEBUG_INFO
2456                             ("Replaced existing measurement: %d\n",
2457                              res->u.spectrum.id);
2458                         priv->measurement_status &= ~MEASUREMENT_READY;
2459                 }
2460                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2461                 rc = 0;
2462                 break;
2463
2464         case 1:         /* Command will not be handled */
2465                 rc = -EAGAIN;
2466                 break;
2467         }
2468
2469         dev_kfree_skb_any(cmd.meta.u.skb);
2470
2471         return rc;
2472 }
2473 #endif
2474
2475 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2476                                  struct iwl4965_tx_info *tx_sta)
2477 {
2478
2479         tx_sta->status.ack_signal = 0;
2480         tx_sta->status.excessive_retries = 0;
2481
2482         if (in_interrupt())
2483                 ieee80211_tx_status_irqsafe(priv->hw,
2484                                             tx_sta->skb[0], &(tx_sta->status));
2485         else
2486                 ieee80211_tx_status(priv->hw,
2487                                     tx_sta->skb[0], &(tx_sta->status));
2488
2489         tx_sta->skb[0] = NULL;
2490 }
2491
2492 /**
2493  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2494  *
2495  * When FW advances 'R' index, all entries between old and new 'R' index
2496  * need to be reclaimed. As result, some free space forms.  If there is
2497  * enough free space (> low mark), wake the stack that feeds us.
2498  */
2499 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2500 {
2501         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2502         struct iwl4965_queue *q = &txq->q;
2503         int nfreed = 0;
2504
2505         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2506                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2507                           "is out of range [0-%d] %d %d.\n", txq_id,
2508                           index, q->n_bd, q->write_ptr, q->read_ptr);
2509                 return 0;
2510         }
2511
2512         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2513                 q->read_ptr != index;
2514                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2515                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2516                         iwl4965_txstatus_to_ieee(priv,
2517                                         &(txq->txb[txq->q.read_ptr]));
2518                         iwl4965_hw_txq_free_tfd(priv, txq);
2519                 } else if (nfreed > 1) {
2520                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2521                                         q->write_ptr, q->read_ptr);
2522                         queue_work(priv->workqueue, &priv->restart);
2523                 }
2524                 nfreed++;
2525         }
2526
2527         return nfreed;
2528 }
2529
2530 static int iwl4965_is_tx_success(u32 status)
2531 {
2532         status &= TX_STATUS_MSK;
2533         return (status == TX_STATUS_SUCCESS)
2534             || (status == TX_STATUS_DIRECT_DONE);
2535 }
2536
2537 /******************************************************************************
2538  *
2539  * Generic RX handler implementations
2540  *
2541  ******************************************************************************/
2542 #ifdef CONFIG_IWL4965_HT
2543
2544 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2545                                     struct ieee80211_hdr *hdr)
2546 {
2547         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2548                 return IWL_AP_ID;
2549         else {
2550                 u8 *da = ieee80211_get_DA(hdr);
2551                 return iwl_find_station(priv, da);
2552         }
2553 }
2554
2555 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2556         struct iwl_priv *priv, int txq_id, int idx)
2557 {
2558         if (priv->txq[txq_id].txb[idx].skb[0])
2559                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2560                                 txb[idx].skb[0]->data;
2561         return NULL;
2562 }
2563
2564 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2565 {
2566         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2567                                 tx_resp->frame_count);
2568         return le32_to_cpu(*scd_ssn) & MAX_SN;
2569
2570 }
2571
2572 /**
2573  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2574  */
2575 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2576                                       struct iwl_ht_agg *agg,
2577                                       struct iwl4965_tx_resp_agg *tx_resp,
2578                                       u16 start_idx)
2579 {
2580         u16 status;
2581         struct agg_tx_status *frame_status = &tx_resp->status;
2582         struct ieee80211_tx_status *tx_status = NULL;
2583         struct ieee80211_hdr *hdr = NULL;
2584         int i, sh;
2585         int txq_id, idx;
2586         u16 seq;
2587
2588         if (agg->wait_for_ba)
2589                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2590
2591         agg->frame_count = tx_resp->frame_count;
2592         agg->start_idx = start_idx;
2593         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2594         agg->bitmap = 0;
2595
2596         /* # frames attempted by Tx command */
2597         if (agg->frame_count == 1) {
2598                 /* Only one frame was attempted; no block-ack will arrive */
2599                 status = le16_to_cpu(frame_status[0].status);
2600                 seq  = le16_to_cpu(frame_status[0].sequence);
2601                 idx = SEQ_TO_INDEX(seq);
2602                 txq_id = SEQ_TO_QUEUE(seq);
2603
2604                 /* FIXME: code repetition */
2605                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2606                                    agg->frame_count, agg->start_idx, idx);
2607
2608                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2609                 tx_status->retry_count = tx_resp->failure_frame;
2610                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2611                 tx_status->flags = iwl4965_is_tx_success(status)?
2612                         IEEE80211_TX_STATUS_ACK : 0;
2613                 iwl4965_hwrate_to_tx_control(priv,
2614                                              le32_to_cpu(tx_resp->rate_n_flags),
2615                                              &tx_status->control);
2616                 /* FIXME: code repetition end */
2617
2618                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2619                                     status & 0xff, tx_resp->failure_frame);
2620                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2621                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2622
2623                 agg->wait_for_ba = 0;
2624         } else {
2625                 /* Two or more frames were attempted; expect block-ack */
2626                 u64 bitmap = 0;
2627                 int start = agg->start_idx;
2628
2629                 /* Construct bit-map of pending frames within Tx window */
2630                 for (i = 0; i < agg->frame_count; i++) {
2631                         u16 sc;
2632                         status = le16_to_cpu(frame_status[i].status);
2633                         seq  = le16_to_cpu(frame_status[i].sequence);
2634                         idx = SEQ_TO_INDEX(seq);
2635                         txq_id = SEQ_TO_QUEUE(seq);
2636
2637                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2638                                       AGG_TX_STATE_ABORT_MSK))
2639                                 continue;
2640
2641                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2642                                            agg->frame_count, txq_id, idx);
2643
2644                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2645
2646                         sc = le16_to_cpu(hdr->seq_ctrl);
2647                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2648                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2649                                           " idx=%d, seq_idx=%d, seq=%d\n",
2650                                           idx, SEQ_TO_SN(sc),
2651                                           hdr->seq_ctrl);
2652                                 return -1;
2653                         }
2654
2655                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2656                                            i, idx, SEQ_TO_SN(sc));
2657
2658                         sh = idx - start;
2659                         if (sh > 64) {
2660                                 sh = (start - idx) + 0xff;
2661                                 bitmap = bitmap << sh;
2662                                 sh = 0;
2663                                 start = idx;
2664                         } else if (sh < -64)
2665                                 sh  = 0xff - (start - idx);
2666                         else if (sh < 0) {
2667                                 sh = start - idx;
2668                                 start = idx;
2669                                 bitmap = bitmap << sh;
2670                                 sh = 0;
2671                         }
2672                         bitmap |= (1 << sh);
2673                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2674                                            start, (u32)(bitmap & 0xFFFFFFFF));
2675                 }
2676
2677                 agg->bitmap = bitmap;
2678                 agg->start_idx = start;
2679                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2680                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2681                                    agg->frame_count, agg->start_idx,
2682                                    (unsigned long long)agg->bitmap);
2683
2684                 if (bitmap)
2685                         agg->wait_for_ba = 1;
2686         }
2687         return 0;
2688 }
2689 #endif
2690
2691 /**
2692  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2693  */
2694 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2695                                 struct iwl_rx_mem_buffer *rxb)
2696 {
2697         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2698         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2699         int txq_id = SEQ_TO_QUEUE(sequence);
2700         int index = SEQ_TO_INDEX(sequence);
2701         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2702         struct ieee80211_tx_status *tx_status;
2703         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2704         u32  status = le32_to_cpu(tx_resp->status);
2705 #ifdef CONFIG_IWL4965_HT
2706         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2707         struct ieee80211_hdr *hdr;
2708         __le16 *qc;
2709 #endif
2710
2711         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2712                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2713                           "is out of range [0-%d] %d %d\n", txq_id,
2714                           index, txq->q.n_bd, txq->q.write_ptr,
2715                           txq->q.read_ptr);
2716                 return;
2717         }
2718
2719 #ifdef CONFIG_IWL4965_HT
2720         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2721         qc = ieee80211_get_qos_ctrl(hdr);
2722
2723         if (qc)
2724                 tid = le16_to_cpu(*qc) & 0xf;
2725
2726         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2727         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2728                 IWL_ERROR("Station not known\n");
2729                 return;
2730         }
2731
2732         if (txq->sched_retry) {
2733                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2734                 struct iwl_ht_agg *agg = NULL;
2735
2736                 if (!qc)
2737                         return;
2738
2739                 agg = &priv->stations[sta_id].tid[tid].agg;
2740
2741                 iwl4965_tx_status_reply_tx(priv, agg,
2742                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2743
2744                 if ((tx_resp->frame_count == 1) &&
2745                     !iwl4965_is_tx_success(status)) {
2746                         /* TODO: send BAR */
2747                 }
2748
2749                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2750                         int freed, ampdu_q;
2751                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2752                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2753                                            "%d index %d\n", scd_ssn , index);
2754                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2755                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2756
2757                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2758                             txq_id >= 0 && priv->mac80211_registered &&
2759                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2760                                 /* calculate mac80211 ampdu sw queue to wake */
2761                                 ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
2762                                           priv->hw->queues;
2763                                 if (agg->state == IWL_AGG_OFF)
2764                                         ieee80211_wake_queue(priv->hw, txq_id);
2765                                 else
2766                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2767                         }
2768                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2769                 }
2770         } else {
2771 #endif /* CONFIG_IWL4965_HT */
2772         tx_status = &(txq->txb[txq->q.read_ptr].status);
2773
2774         tx_status->retry_count = tx_resp->failure_frame;
2775         tx_status->flags =
2776             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2777         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2778                                      &tx_status->control);
2779
2780         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2781                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2782                      status, le32_to_cpu(tx_resp->rate_n_flags),
2783                      tx_resp->failure_frame);
2784
2785         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2786 #ifdef CONFIG_IWL4965_HT
2787         if (index != -1) {
2788                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2789                 if (tid != MAX_TID_COUNT)
2790                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2791                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2792                         (txq_id >= 0) && priv->mac80211_registered)
2793                         ieee80211_wake_queue(priv->hw, txq_id);
2794                 if (tid != MAX_TID_COUNT)
2795                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2796         }
2797         }
2798 #endif /* CONFIG_IWL4965_HT */
2799
2800         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2801                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2802 }
2803
2804
2805 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2806                                    struct iwl_rx_mem_buffer *rxb)
2807 {
2808         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2809         struct iwl4965_alive_resp *palive;
2810         struct delayed_work *pwork;
2811
2812         palive = &pkt->u.alive_frame;
2813
2814         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2815                        "0x%01X 0x%01X\n",
2816                        palive->is_valid, palive->ver_type,
2817                        palive->ver_subtype);
2818
2819         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2820                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2821                 memcpy(&priv->card_alive_init,
2822                        &pkt->u.alive_frame,
2823                        sizeof(struct iwl4965_init_alive_resp));
2824                 pwork = &priv->init_alive_start;
2825         } else {
2826                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2827                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2828                        sizeof(struct iwl4965_alive_resp));
2829                 pwork = &priv->alive_start;
2830         }
2831
2832         /* We delay the ALIVE response by 5ms to
2833          * give the HW RF Kill time to activate... */
2834         if (palive->is_valid == UCODE_VALID_OK)
2835                 queue_delayed_work(priv->workqueue, pwork,
2836                                    msecs_to_jiffies(5));
2837         else
2838                 IWL_WARNING("uCode did not respond OK.\n");
2839 }
2840
2841 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2842                                      struct iwl_rx_mem_buffer *rxb)
2843 {
2844         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2845
2846         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2847         return;
2848 }
2849
2850 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2851                                    struct iwl_rx_mem_buffer *rxb)
2852 {
2853         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2854
2855         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2856                 "seq 0x%04X ser 0x%08X\n",
2857                 le32_to_cpu(pkt->u.err_resp.error_type),
2858                 get_cmd_string(pkt->u.err_resp.cmd_id),
2859                 pkt->u.err_resp.cmd_id,
2860                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2861                 le32_to_cpu(pkt->u.err_resp.error_info));
2862 }
2863
2864 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2865
2866 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2867 {
2868         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2869         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2870         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2871         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2872                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2873         rxon->channel = csa->channel;
2874         priv->staging_rxon.channel = csa->channel;
2875 }
2876
2877 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2878                                           struct iwl_rx_mem_buffer *rxb)
2879 {
2880 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2881         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2882         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2883
2884         if (!report->state) {
2885                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2886                           "Spectrum Measure Notification: Start\n");
2887                 return;
2888         }
2889
2890         memcpy(&priv->measure_report, report, sizeof(*report));
2891         priv->measurement_status |= MEASUREMENT_READY;
2892 #endif
2893 }
2894
2895 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2896                                       struct iwl_rx_mem_buffer *rxb)
2897 {
2898 #ifdef CONFIG_IWLWIFI_DEBUG
2899         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2900         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2901         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2902                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2903 #endif
2904 }
2905
2906 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2907                                              struct iwl_rx_mem_buffer *rxb)
2908 {
2909         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2910         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2911                         "notification for %s:\n",
2912                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2913         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2914 }
2915
2916 static void iwl4965_bg_beacon_update(struct work_struct *work)
2917 {
2918         struct iwl_priv *priv =
2919                 container_of(work, struct iwl_priv, beacon_update);
2920         struct sk_buff *beacon;
2921
2922         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2923         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2924
2925         if (!beacon) {
2926                 IWL_ERROR("update beacon failed\n");
2927                 return;
2928         }
2929
2930         mutex_lock(&priv->mutex);
2931         /* new beacon skb is allocated every time; dispose previous.*/
2932         if (priv->ibss_beacon)
2933                 dev_kfree_skb(priv->ibss_beacon);
2934
2935         priv->ibss_beacon = beacon;
2936         mutex_unlock(&priv->mutex);
2937
2938         iwl4965_send_beacon_cmd(priv);
2939 }
2940
2941 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2942                                 struct iwl_rx_mem_buffer *rxb)
2943 {
2944 #ifdef CONFIG_IWLWIFI_DEBUG
2945         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2946         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2947         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2948
2949         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2950                 "tsf %d %d rate %d\n",
2951                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2952                 beacon->beacon_notify_hdr.failure_frame,
2953                 le32_to_cpu(beacon->ibss_mgr_status),
2954                 le32_to_cpu(beacon->high_tsf),
2955                 le32_to_cpu(beacon->low_tsf), rate);
2956 #endif
2957
2958         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
2959             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
2960                 queue_work(priv->workqueue, &priv->beacon_update);
2961 }
2962
2963 /* Service response to REPLY_SCAN_CMD (0x80) */
2964 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
2965                               struct iwl_rx_mem_buffer *rxb)
2966 {
2967 #ifdef CONFIG_IWLWIFI_DEBUG
2968         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2969         struct iwl4965_scanreq_notification *notif =
2970             (struct iwl4965_scanreq_notification *)pkt->u.raw;
2971
2972         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
2973 #endif
2974 }
2975
2976 /* Service SCAN_START_NOTIFICATION (0x82) */
2977 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
2978                                     struct iwl_rx_mem_buffer *rxb)
2979 {
2980         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2981         struct iwl4965_scanstart_notification *notif =
2982             (struct iwl4965_scanstart_notification *)pkt->u.raw;
2983         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
2984         IWL_DEBUG_SCAN("Scan start: "
2985                        "%d [802.11%s] "
2986                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
2987                        notif->channel,
2988                        notif->band ? "bg" : "a",
2989                        notif->tsf_high,
2990                        notif->tsf_low, notif->status, notif->beacon_timer);
2991 }
2992
2993 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
2994 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
2995                                       struct iwl_rx_mem_buffer *rxb)
2996 {
2997         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2998         struct iwl4965_scanresults_notification *notif =
2999             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3000
3001         IWL_DEBUG_SCAN("Scan ch.res: "
3002                        "%d [802.11%s] "
3003                        "(TSF: 0x%08X:%08X) - %d "
3004                        "elapsed=%lu usec (%dms since last)\n",
3005                        notif->channel,
3006                        notif->band ? "bg" : "a",
3007                        le32_to_cpu(notif->tsf_high),
3008                        le32_to_cpu(notif->tsf_low),
3009                        le32_to_cpu(notif->statistics[0]),
3010                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3011                        jiffies_to_msecs(elapsed_jiffies
3012                                         (priv->last_scan_jiffies, jiffies)));
3013
3014         priv->last_scan_jiffies = jiffies;
3015         priv->next_scan_jiffies = 0;
3016 }
3017
3018 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3019 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3020                                        struct iwl_rx_mem_buffer *rxb)
3021 {
3022         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3023         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3024
3025         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3026                        scan_notif->scanned_channels,
3027                        scan_notif->tsf_low,
3028                        scan_notif->tsf_high, scan_notif->status);
3029
3030         /* The HW is no longer scanning */
3031         clear_bit(STATUS_SCAN_HW, &priv->status);
3032
3033         /* The scan completion notification came in, so kill that timer... */
3034         cancel_delayed_work(&priv->scan_check);
3035
3036         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3037                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3038                        jiffies_to_msecs(elapsed_jiffies
3039                                         (priv->scan_pass_start, jiffies)));
3040
3041         /* Remove this scanned band from the list
3042          * of pending bands to scan */
3043         priv->scan_bands--;
3044
3045         /* If a request to abort was given, or the scan did not succeed
3046          * then we reset the scan state machine and terminate,
3047          * re-queuing another scan if one has been requested */
3048         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3049                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3050                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3051         } else {
3052                 /* If there are more bands on this scan pass reschedule */
3053                 if (priv->scan_bands > 0)
3054                         goto reschedule;
3055         }
3056
3057         priv->last_scan_jiffies = jiffies;
3058         priv->next_scan_jiffies = 0;
3059         IWL_DEBUG_INFO("Setting scan to off\n");
3060
3061         clear_bit(STATUS_SCANNING, &priv->status);
3062
3063         IWL_DEBUG_INFO("Scan took %dms\n",
3064                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3065
3066         queue_work(priv->workqueue, &priv->scan_completed);
3067
3068         return;
3069
3070 reschedule:
3071         priv->scan_pass_start = jiffies;
3072         queue_work(priv->workqueue, &priv->request_scan);
3073 }
3074
3075 /* Handle notification from uCode that card's power state is changing
3076  * due to software, hardware, or critical temperature RFKILL */
3077 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3078                                     struct iwl_rx_mem_buffer *rxb)
3079 {
3080         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3081         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3082         unsigned long status = priv->status;
3083
3084         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3085                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3086                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3087
3088         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3089                      RF_CARD_DISABLED)) {
3090
3091                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3092                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3093
3094                 if (!iwl_grab_nic_access(priv)) {
3095                         iwl_write_direct32(
3096                                 priv, HBUS_TARG_MBX_C,
3097                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3098
3099                         iwl_release_nic_access(priv);
3100                 }
3101
3102                 if (!(flags & RXON_CARD_DISABLED)) {
3103                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3104                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3105                         if (!iwl_grab_nic_access(priv)) {
3106                                 iwl_write_direct32(
3107                                         priv, HBUS_TARG_MBX_C,
3108                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3109
3110                                 iwl_release_nic_access(priv);
3111                         }
3112                 }
3113
3114                 if (flags & RF_CARD_DISABLED) {
3115                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3116                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3117                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3118                         if (!iwl_grab_nic_access(priv))
3119                                 iwl_release_nic_access(priv);
3120                 }
3121         }
3122
3123         if (flags & HW_CARD_DISABLED)
3124                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3125         else
3126                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3127
3128
3129         if (flags & SW_CARD_DISABLED)
3130                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3131         else
3132                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3133
3134         if (!(flags & RXON_CARD_DISABLED))
3135                 iwl4965_scan_cancel(priv);
3136
3137         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3138              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3139             (test_bit(STATUS_RF_KILL_SW, &status) !=
3140              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3141                 queue_work(priv->workqueue, &priv->rf_kill);
3142         else
3143                 wake_up_interruptible(&priv->wait_command_queue);
3144 }
3145
3146 /**
3147  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3148  *
3149  * Setup the RX handlers for each of the reply types sent from the uCode
3150  * to the host.
3151  *
3152  * This function chains into the hardware specific files for them to setup
3153  * any hardware specific handlers as well.
3154  */
3155 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3156 {
3157         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3158         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3159         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3160         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3161         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3162             iwl4965_rx_spectrum_measure_notif;
3163         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3164         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3165             iwl4965_rx_pm_debug_statistics_notif;
3166         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3167
3168         /*
3169          * The same handler is used for both the REPLY to a discrete
3170          * statistics request from the host as well as for the periodic
3171          * statistics notifications (after received beacons) from the uCode.
3172          */
3173         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3174         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3175
3176         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3177         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3178         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3179             iwl4965_rx_scan_results_notif;
3180         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3181             iwl4965_rx_scan_complete_notif;
3182         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3183         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3184
3185         /* Set up hardware specific Rx handlers */
3186         priv->cfg->ops->lib->rx_handler_setup(priv);
3187 }
3188
3189 /**
3190  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3191  * @rxb: Rx buffer to reclaim
3192  *
3193  * If an Rx buffer has an async callback associated with it the callback
3194  * will be executed.  The attached skb (if present) will only be freed
3195  * if the callback returns 1
3196  */
3197 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3198                                     struct iwl_rx_mem_buffer *rxb)
3199 {
3200         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3201         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3202         int txq_id = SEQ_TO_QUEUE(sequence);
3203         int index = SEQ_TO_INDEX(sequence);
3204         int huge = sequence & SEQ_HUGE_FRAME;
3205         int cmd_index;
3206         struct iwl_cmd *cmd;
3207
3208         /* If a Tx command is being handled and it isn't in the actual
3209          * command queue then there a command routing bug has been introduced
3210          * in the queue management code. */
3211         if (txq_id != IWL_CMD_QUEUE_NUM)
3212                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3213                           txq_id, pkt->hdr.cmd);
3214         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3215
3216         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3217         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3218
3219         /* Input error checking is done when commands are added to queue. */
3220         if (cmd->meta.flags & CMD_WANT_SKB) {
3221                 cmd->meta.source->u.skb = rxb->skb;
3222                 rxb->skb = NULL;
3223         } else if (cmd->meta.u.callback &&
3224                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3225                 rxb->skb = NULL;
3226
3227         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3228
3229         if (!(cmd->meta.flags & CMD_ASYNC)) {
3230                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3231                 wake_up_interruptible(&priv->wait_command_queue);
3232         }
3233 }
3234
3235 /*
3236  * this should be called while priv->lock is locked
3237 */
3238 static void __iwl_rx_replenish(struct iwl_priv *priv)
3239 {
3240         iwl_rx_allocate(priv);
3241         iwl_rx_queue_restock(priv);
3242 }
3243
3244
3245 /**
3246  * iwl_rx_handle - Main entry function for receiving responses from uCode
3247  *
3248  * Uses the priv->rx_handlers callback function array to invoke
3249  * the appropriate handlers, including command responses,
3250  * frame-received notifications, and other notifications.
3251  */
3252 void iwl_rx_handle(struct iwl_priv *priv)
3253 {
3254         struct iwl_rx_mem_buffer *rxb;
3255         struct iwl_rx_packet *pkt;
3256         struct iwl_rx_queue *rxq = &priv->rxq;
3257         u32 r, i;
3258         int reclaim;
3259         unsigned long flags;
3260         u8 fill_rx = 0;
3261         u32 count = 8;
3262
3263         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3264          * buffer that the driver may process (last buffer filled by ucode). */
3265         r = iwl4965_hw_get_rx_read(priv);
3266         i = rxq->read;
3267
3268         /* Rx interrupt, but nothing sent from uCode */
3269         if (i == r)
3270                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3271
3272         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3273                 fill_rx = 1;
3274
3275         while (i != r) {
3276                 rxb = rxq->queue[i];
3277
3278                 /* If an RXB doesn't have a Rx queue slot associated with it,
3279                  * then a bug has been introduced in the queue refilling
3280                  * routines -- catch it here */
3281                 BUG_ON(rxb == NULL);
3282
3283                 rxq->queue[i] = NULL;
3284
3285                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3286                                             priv->hw_params.rx_buf_size,
3287                                             PCI_DMA_FROMDEVICE);
3288                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3289
3290                 /* Reclaim a command buffer only if this packet is a response
3291                  *   to a (driver-originated) command.
3292                  * If the packet (e.g. Rx frame) originated from uCode,
3293                  *   there is no command buffer to reclaim.
3294                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3295                  *   but apparently a few don't get set; catch them here. */
3296                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3297                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3298                         (pkt->hdr.cmd != REPLY_RX) &&
3299                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3300                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3301                         (pkt->hdr.cmd != REPLY_TX);
3302
3303                 /* Based on type of command response or notification,
3304                  *   handle those that need handling via function in
3305                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3306                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3307                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3308                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3309                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3310                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3311                 } else {
3312                         /* No handling needed */
3313                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3314                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3315                                 r, i, get_cmd_string(pkt->hdr.cmd),
3316                                 pkt->hdr.cmd);
3317                 }
3318
3319                 if (reclaim) {
3320                         /* Invoke any callbacks, transfer the skb to caller, and
3321                          * fire off the (possibly) blocking iwl_send_cmd()
3322                          * as we reclaim the driver command queue */
3323                         if (rxb && rxb->skb)
3324                                 iwl4965_tx_cmd_complete(priv, rxb);
3325                         else
3326                                 IWL_WARNING("Claim null rxb?\n");
3327                 }
3328
3329                 /* For now we just don't re-use anything.  We can tweak this
3330                  * later to try and re-use notification packets and SKBs that
3331                  * fail to Rx correctly */
3332                 if (rxb->skb != NULL) {
3333                         priv->alloc_rxb_skb--;
3334                         dev_kfree_skb_any(rxb->skb);
3335                         rxb->skb = NULL;
3336                 }
3337
3338                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3339                                  priv->hw_params.rx_buf_size,
3340                                  PCI_DMA_FROMDEVICE);
3341                 spin_lock_irqsave(&rxq->lock, flags);
3342                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3343                 spin_unlock_irqrestore(&rxq->lock, flags);
3344                 i = (i + 1) & RX_QUEUE_MASK;
3345                 /* If there are a lot of unused frames,
3346                  * restock the Rx queue so ucode wont assert. */
3347                 if (fill_rx) {
3348                         count++;
3349                         if (count >= 8) {
3350                                 priv->rxq.read = i;
3351                                 __iwl_rx_replenish(priv);
3352                                 count = 0;
3353                         }
3354                 }
3355         }
3356
3357         /* Backtrack one entry */
3358         priv->rxq.read = i;
3359         iwl_rx_queue_restock(priv);
3360 }
3361 /* Convert linear signal-to-noise ratio into dB */
3362 static u8 ratio2dB[100] = {
3363 /*       0   1   2   3   4   5   6   7   8   9 */
3364          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3365         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3366         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3367         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3368         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3369         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3370         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3371         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3372         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3373         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3374 };
3375
3376 /* Calculates a relative dB value from a ratio of linear
3377  *   (i.e. not dB) signal levels.
3378  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3379 int iwl4965_calc_db_from_ratio(int sig_ratio)
3380 {
3381         /* 1000:1 or higher just report as 60 dB */
3382         if (sig_ratio >= 1000)
3383                 return 60;
3384
3385         /* 100:1 or higher, divide by 10 and use table,
3386          *   add 20 dB to make up for divide by 10 */
3387         if (sig_ratio >= 100)
3388                 return (20 + (int)ratio2dB[sig_ratio/10]);
3389
3390         /* We shouldn't see this */
3391         if (sig_ratio < 1)
3392                 return 0;
3393
3394         /* Use table for ratios 1:1 - 99:1 */
3395         return (int)ratio2dB[sig_ratio];
3396 }
3397
3398 #define PERFECT_RSSI (-20) /* dBm */
3399 #define WORST_RSSI (-95)   /* dBm */
3400 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3401
3402 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3403  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3404  *   about formulas used below. */
3405 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3406 {
3407         int sig_qual;
3408         int degradation = PERFECT_RSSI - rssi_dbm;
3409
3410         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3411          * as indicator; formula is (signal dbm - noise dbm).
3412          * SNR at or above 40 is a great signal (100%).
3413          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3414          * Weakest usable signal is usually 10 - 15 dB SNR. */
3415         if (noise_dbm) {
3416                 if (rssi_dbm - noise_dbm >= 40)
3417                         return 100;
3418                 else if (rssi_dbm < noise_dbm)
3419                         return 0;
3420                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3421
3422         /* Else use just the signal level.
3423          * This formula is a least squares fit of data points collected and
3424          *   compared with a reference system that had a percentage (%) display
3425          *   for signal quality. */
3426         } else
3427                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3428                             (15 * RSSI_RANGE + 62 * degradation)) /
3429                            (RSSI_RANGE * RSSI_RANGE);
3430
3431         if (sig_qual > 100)
3432                 sig_qual = 100;
3433         else if (sig_qual < 1)
3434                 sig_qual = 0;
3435
3436         return sig_qual;
3437 }
3438
3439 /**
3440  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3441  */
3442 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3443                                   struct iwl4965_tx_queue *txq)
3444 {
3445         u32 reg = 0;
3446         int rc = 0;
3447         int txq_id = txq->q.id;
3448
3449         if (txq->need_update == 0)
3450                 return rc;
3451
3452         /* if we're trying to save power */
3453         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3454                 /* wake up nic if it's powered down ...
3455                  * uCode will wake up, and interrupt us again, so next
3456                  * time we'll skip this part. */
3457                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3458
3459                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3460                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3461                         iwl_set_bit(priv, CSR_GP_CNTRL,
3462                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3463                         return rc;
3464                 }
3465
3466                 /* restore this queue's parameters in nic hardware. */
3467                 rc = iwl_grab_nic_access(priv);
3468                 if (rc)
3469                         return rc;
3470                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3471                                      txq->q.write_ptr | (txq_id << 8));
3472                 iwl_release_nic_access(priv);
3473
3474         /* else not in power-save mode, uCode will never sleep when we're
3475          * trying to tx (during RFKILL, we're not trying to tx). */
3476         } else
3477                 iwl_write32(priv, HBUS_TARG_WRPTR,
3478                             txq->q.write_ptr | (txq_id << 8));
3479
3480         txq->need_update = 0;
3481
3482         return rc;
3483 }
3484
3485 #ifdef CONFIG_IWLWIFI_DEBUG
3486 static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv)
3487 {
3488         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
3489         DECLARE_MAC_BUF(mac);
3490
3491         IWL_DEBUG_RADIO("RX CONFIG:\n");
3492         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3493         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3494         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3495         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3496                         le32_to_cpu(rxon->filter_flags));
3497         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3498         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3499                         rxon->ofdm_basic_rates);
3500         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3501         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3502                         print_mac(mac, rxon->node_addr));
3503         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3504                         print_mac(mac, rxon->bssid_addr));
3505         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3506 }
3507 #endif
3508
3509 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3510 {
3511         IWL_DEBUG_ISR("Enabling interrupts\n");
3512         set_bit(STATUS_INT_ENABLED, &priv->status);
3513         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3514 }
3515
3516 /* call this function to flush any scheduled tasklet */
3517 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3518 {
3519         /* wait to make sure we flush pedding tasklet*/
3520         synchronize_irq(priv->pci_dev->irq);
3521         tasklet_kill(&priv->irq_tasklet);
3522 }
3523
3524 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3525 {
3526         clear_bit(STATUS_INT_ENABLED, &priv->status);
3527
3528         /* disable interrupts from uCode/NIC to host */
3529         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3530
3531         /* acknowledge/clear/reset any interrupts still pending
3532          * from uCode or flow handler (Rx/Tx DMA) */
3533         iwl_write32(priv, CSR_INT, 0xffffffff);
3534         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3535         IWL_DEBUG_ISR("Disabled interrupts\n");
3536 }
3537
3538 static const char *desc_lookup(int i)
3539 {
3540         switch (i) {
3541         case 1:
3542                 return "FAIL";
3543         case 2:
3544                 return "BAD_PARAM";
3545         case 3:
3546                 return "BAD_CHECKSUM";
3547         case 4:
3548                 return "NMI_INTERRUPT";
3549         case 5:
3550                 return "SYSASSERT";
3551         case 6:
3552                 return "FATAL_ERROR";
3553         }
3554
3555         return "UNKNOWN";
3556 }
3557
3558 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3559 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3560
3561 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3562 {
3563         u32 data2, line;
3564         u32 desc, time, count, base, data1;
3565         u32 blink1, blink2, ilink1, ilink2;
3566         int rc;
3567
3568         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3569
3570         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3571                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3572                 return;
3573         }
3574
3575         rc = iwl_grab_nic_access(priv);
3576         if (rc) {
3577                 IWL_WARNING("Can not read from adapter at this time.\n");
3578                 return;
3579         }
3580
3581         count = iwl_read_targ_mem(priv, base);
3582
3583         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3584                 IWL_ERROR("Start IWL Error Log Dump:\n");
3585                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3586         }
3587
3588         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3589         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3590         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3591         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3592         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3593         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3594         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3595         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3596         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3597
3598         IWL_ERROR("Desc               Time       "
3599                   "data1      data2      line\n");
3600         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3601                   desc_lookup(desc), desc, time, data1, data2, line);
3602         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3603         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3604                   ilink1, ilink2);
3605
3606         iwl_release_nic_access(priv);
3607 }
3608
3609 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3610
3611 /**
3612  * iwl4965_print_event_log - Dump error event log to syslog
3613  *
3614  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3615  */
3616 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3617                                 u32 num_events, u32 mode)
3618 {
3619         u32 i;
3620         u32 base;       /* SRAM byte address of event log header */
3621         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3622         u32 ptr;        /* SRAM byte address of log data */
3623         u32 ev, time, data; /* event log data */
3624
3625         if (num_events == 0)
3626                 return;
3627
3628         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3629
3630         if (mode == 0)
3631                 event_size = 2 * sizeof(u32);
3632         else
3633                 event_size = 3 * sizeof(u32);
3634
3635         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3636
3637         /* "time" is actually "data" for mode 0 (no timestamp).
3638          * place event id # at far right for easier visual parsing. */
3639         for (i = 0; i < num_events; i++) {
3640                 ev = iwl_read_targ_mem(priv, ptr);
3641                 ptr += sizeof(u32);
3642                 time = iwl_read_targ_mem(priv, ptr);
3643                 ptr += sizeof(u32);
3644                 if (mode == 0)
3645                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
3646                 else {
3647                         data = iwl_read_targ_mem(priv, ptr);
3648                         ptr += sizeof(u32);
3649                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
3650                 }
3651         }
3652 }
3653
3654 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
3655 {
3656         int rc;
3657         u32 base;       /* SRAM byte address of event log header */
3658         u32 capacity;   /* event log capacity in # entries */
3659         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3660         u32 num_wraps;  /* # times uCode wrapped to top of log */
3661         u32 next_entry; /* index of next entry to be written by uCode */
3662         u32 size;       /* # entries that we'll print */
3663
3664         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3665         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3666                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
3667                 return;
3668         }
3669
3670         rc = iwl_grab_nic_access(priv);
3671         if (rc) {
3672                 IWL_WARNING("Can not read from adapter at this time.\n");
3673                 return;
3674         }
3675
3676         /* event log header */
3677         capacity = iwl_read_targ_mem(priv, base);
3678         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3679         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3680         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3681
3682         size = num_wraps ? capacity : next_entry;
3683
3684         /* bail out if nothing in log */
3685         if (size == 0) {
3686                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
3687                 iwl_release_nic_access(priv);
3688                 return;
3689         }
3690
3691         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
3692                   size, num_wraps);
3693
3694         /* if uCode has wrapped back to top of log, start at the oldest entry,
3695          * i.e the next one that uCode would fill. */
3696         if (num_wraps)
3697                 iwl4965_print_event_log(priv, next_entry,
3698                                     capacity - next_entry, mode);
3699
3700         /* (then/else) start at top of log */
3701         iwl4965_print_event_log(priv, 0, next_entry, mode);
3702
3703         iwl_release_nic_access(priv);
3704 }
3705
3706 /**
3707  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
3708  */
3709 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
3710 {
3711         /* Set the FW error flag -- cleared on iwl4965_down */
3712         set_bit(STATUS_FW_ERROR, &priv->status);
3713
3714         /* Cancel currently queued command. */
3715         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3716
3717 #ifdef CONFIG_IWLWIFI_DEBUG
3718         if (priv->debug_level & IWL_DL_FW_ERRORS) {
3719                 iwl4965_dump_nic_error_log(priv);
3720                 iwl4965_dump_nic_event_log(priv);
3721                 iwl4965_print_rx_config_cmd(priv);
3722         }
3723 #endif
3724
3725         wake_up_interruptible(&priv->wait_command_queue);
3726
3727         /* Keep the restart process from trying to send host
3728          * commands by clearing the INIT status bit */
3729         clear_bit(STATUS_READY, &priv->status);
3730
3731         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3732                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
3733                           "Restarting adapter due to uCode error.\n");
3734
3735                 if (iwl_is_associated(priv)) {
3736                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
3737                                sizeof(priv->recovery_rxon));
3738                         priv->error_recovering = 1;
3739                 }
3740                 queue_work(priv->workqueue, &priv->restart);
3741         }
3742 }
3743
3744 static void iwl4965_error_recovery(struct iwl_priv *priv)
3745 {
3746         unsigned long flags;
3747
3748         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
3749                sizeof(priv->staging_rxon));
3750         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3751         iwl4965_commit_rxon(priv);
3752
3753         iwl4965_rxon_add_station(priv, priv->bssid, 1);
3754
3755         spin_lock_irqsave(&priv->lock, flags);
3756         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
3757         priv->error_recovering = 0;
3758         spin_unlock_irqrestore(&priv->lock, flags);
3759 }
3760
3761 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
3762 {
3763         u32 inta, handled = 0;
3764         u32 inta_fh;
3765         unsigned long flags;
3766 #ifdef CONFIG_IWLWIFI_DEBUG
3767         u32 inta_mask;
3768 #endif
3769
3770         spin_lock_irqsave(&priv->lock, flags);
3771
3772         /* Ack/clear/reset pending uCode interrupts.
3773          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
3774          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
3775         inta = iwl_read32(priv, CSR_INT);
3776         iwl_write32(priv, CSR_INT, inta);
3777
3778         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
3779          * Any new interrupts that happen after this, either while we're
3780          * in this tasklet, or later, will show up in next ISR/tasklet. */
3781         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3782         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
3783
3784 #ifdef CONFIG_IWLWIFI_DEBUG
3785         if (priv->debug_level & IWL_DL_ISR) {
3786                 /* just for debug */
3787                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3788                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3789                               inta, inta_mask, inta_fh);
3790         }
3791 #endif
3792
3793         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
3794          * atomic, make sure that inta covers all the interrupts that
3795          * we've discovered, even if FH interrupt came in just after
3796          * reading CSR_INT. */
3797         if (inta_fh & CSR49_FH_INT_RX_MASK)
3798                 inta |= CSR_INT_BIT_FH_RX;
3799         if (inta_fh & CSR49_FH_INT_TX_MASK)
3800                 inta |= CSR_INT_BIT_FH_TX;
3801
3802         /* Now service all interrupt bits discovered above. */
3803         if (inta & CSR_INT_BIT_HW_ERR) {
3804                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
3805
3806                 /* Tell the device to stop sending interrupts */
3807                 iwl4965_disable_interrupts(priv);
3808
3809                 iwl4965_irq_handle_error(priv);
3810
3811                 handled |= CSR_INT_BIT_HW_ERR;
3812
3813                 spin_unlock_irqrestore(&priv->lock, flags);
3814
3815                 return;
3816         }
3817
3818 #ifdef CONFIG_IWLWIFI_DEBUG
3819         if (priv->debug_level & (IWL_DL_ISR)) {
3820                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
3821                 if (inta & CSR_INT_BIT_SCD)
3822                         IWL_DEBUG_ISR("Scheduler finished to transmit "
3823                                       "the frame/frames.\n");
3824
3825                 /* Alive notification via Rx interrupt will do the real work */
3826                 if (inta & CSR_INT_BIT_ALIVE)
3827                         IWL_DEBUG_ISR("Alive interrupt\n");
3828         }
3829 #endif
3830         /* Safely ignore these bits for debug checks below */
3831         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
3832
3833         /* HW RF KILL switch toggled */
3834         if (inta & CSR_INT_BIT_RF_KILL) {
3835                 int hw_rf_kill = 0;
3836                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
3837                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
3838                         hw_rf_kill = 1;
3839
3840                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
3841                                 "RF_KILL bit toggled to %s.\n",
3842                                 hw_rf_kill ? "disable radio":"enable radio");
3843
3844                 /* Queue restart only if RF_KILL switch was set to "kill"
3845                  *   when we loaded driver, and is now set to "enable".
3846                  * After we're Alive, RF_KILL gets handled by
3847                  *   iwl4965_rx_card_state_notif() */
3848                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
3849                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
3850                         queue_work(priv->workqueue, &priv->restart);
3851                 }
3852
3853                 handled |= CSR_INT_BIT_RF_KILL;
3854         }
3855
3856         /* Chip got too hot and stopped itself */
3857         if (inta & CSR_INT_BIT_CT_KILL) {
3858                 IWL_ERROR("Microcode CT kill error detected.\n");
3859                 handled |= CSR_INT_BIT_CT_KILL;
3860         }
3861
3862         /* Error detected by uCode */
3863         if (inta & CSR_INT_BIT_SW_ERR) {
3864                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
3865                           inta);
3866                 iwl4965_irq_handle_error(priv);
3867                 handled |= CSR_INT_BIT_SW_ERR;
3868         }
3869
3870         /* uCode wakes up after power-down sleep */
3871         if (inta & CSR_INT_BIT_WAKEUP) {
3872                 IWL_DEBUG_ISR("Wakeup interrupt\n");
3873                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
3874                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
3875                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
3876                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
3877                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
3878                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
3879                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
3880
3881                 handled |= CSR_INT_BIT_WAKEUP;
3882         }
3883
3884         /* All uCode command responses, including Tx command responses,
3885          * Rx "responses" (frame-received notification), and other
3886          * notifications from uCode come through here*/
3887         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
3888                 iwl_rx_handle(priv);
3889                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
3890         }
3891
3892         if (inta & CSR_INT_BIT_FH_TX) {
3893                 IWL_DEBUG_ISR("Tx interrupt\n");
3894                 handled |= CSR_INT_BIT_FH_TX;
3895         }
3896
3897         if (inta & ~handled)
3898                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
3899
3900         if (inta & ~CSR_INI_SET_MASK) {
3901                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
3902                          inta & ~CSR_INI_SET_MASK);
3903                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
3904         }
3905
3906         /* Re-enable all interrupts */
3907         /* only Re-enable if diabled by irq */
3908         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3909                 iwl4965_enable_interrupts(priv);
3910
3911 #ifdef CONFIG_IWLWIFI_DEBUG
3912         if (priv->debug_level & (IWL_DL_ISR)) {
3913                 inta = iwl_read32(priv, CSR_INT);
3914                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3915                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3916                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
3917                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
3918         }
3919 #endif
3920         spin_unlock_irqrestore(&priv->lock, flags);
3921 }
3922
3923 static irqreturn_t iwl4965_isr(int irq, void *data)
3924 {
3925         struct iwl_priv *priv = data;
3926         u32 inta, inta_mask;
3927         u32 inta_fh;
3928         if (!priv)
3929                 return IRQ_NONE;
3930
3931         spin_lock(&priv->lock);
3932
3933         /* Disable (but don't clear!) interrupts here to avoid
3934          *    back-to-back ISRs and sporadic interrupts from our NIC.
3935          * If we have something to service, the tasklet will re-enable ints.
3936          * If we *don't* have something, we'll re-enable before leaving here. */
3937         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
3938         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3939
3940         /* Discover which interrupts are active/pending */
3941         inta = iwl_read32(priv, CSR_INT);
3942         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3943
3944         /* Ignore interrupt if there's nothing in NIC to service.
3945          * This may be due to IRQ shared with another device,
3946          * or due to sporadic interrupts thrown from our NIC. */
3947         if (!inta && !inta_fh) {
3948                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
3949                 goto none;
3950         }
3951
3952         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
3953                 /* Hardware disappeared. It might have already raised
3954                  * an interrupt */
3955                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
3956                 goto unplugged;
3957         }
3958
3959         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3960                       inta, inta_mask, inta_fh);
3961
3962         inta &= ~CSR_INT_BIT_SCD;
3963
3964         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
3965         if (likely(inta || inta_fh))
3966                 tasklet_schedule(&priv->irq_tasklet);
3967
3968  unplugged:
3969         spin_unlock(&priv->lock);
3970         return IRQ_HANDLED;
3971
3972  none:
3973         /* re-enable interrupts here since we don't have anything to service. */
3974         /* only Re-enable if diabled by irq */
3975         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3976                 iwl4965_enable_interrupts(priv);
3977         spin_unlock(&priv->lock);
3978         return IRQ_NONE;
3979 }
3980
3981 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
3982  * sending probe req.  This should be set long enough to hear probe responses
3983  * from more than one AP.  */
3984 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
3985 #define IWL_ACTIVE_DWELL_TIME_52    (10)
3986
3987 /* For faster active scanning, scan will move to the next channel if fewer than
3988  * PLCP_QUIET_THRESH packets are heard on this channel within
3989  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
3990  * time if it's a quiet channel (nothing responded to our probe, and there's
3991  * no other traffic).
3992  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
3993 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
3994 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
3995
3996 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
3997  * Must be set longer than active dwell time.
3998  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
3999 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4000 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4001 #define IWL_PASSIVE_DWELL_BASE      (100)
4002 #define IWL_CHANNEL_TUNE_TIME       5
4003
4004 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4005                                                 enum ieee80211_band band)
4006 {
4007         if (band == IEEE80211_BAND_5GHZ)
4008                 return IWL_ACTIVE_DWELL_TIME_52;
4009         else
4010                 return IWL_ACTIVE_DWELL_TIME_24;
4011 }
4012
4013 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4014                                           enum ieee80211_band band)
4015 {
4016         u16 active = iwl4965_get_active_dwell_time(priv, band);
4017         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4018             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4019             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4020
4021         if (iwl_is_associated(priv)) {
4022                 /* If we're associated, we clamp the maximum passive
4023                  * dwell time to be 98% of the beacon interval (minus
4024                  * 2 * channel tune time) */
4025                 passive = priv->beacon_int;
4026                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4027                         passive = IWL_PASSIVE_DWELL_BASE;
4028                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4029         }
4030
4031         if (passive <= active)
4032                 passive = active + 1;
4033
4034         return passive;
4035 }
4036
4037 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4038                                          enum ieee80211_band band,
4039                                      u8 is_active, u8 direct_mask,
4040                                      struct iwl4965_scan_channel *scan_ch)
4041 {
4042         const struct ieee80211_channel *channels = NULL;
4043         const struct ieee80211_supported_band *sband;
4044         const struct iwl_channel_info *ch_info;
4045         u16 passive_dwell = 0;
4046         u16 active_dwell = 0;
4047         int added, i;
4048
4049         sband = iwl_get_hw_mode(priv, band);
4050         if (!sband)
4051                 return 0;
4052
4053         channels = sband->channels;
4054
4055         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4056         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4057
4058         for (i = 0, added = 0; i < sband->n_channels; i++) {
4059                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4060                         continue;
4061
4062                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4063
4064                 ch_info = iwl_get_channel_info(priv, band,
4065                                          scan_ch->channel);
4066                 if (!is_channel_valid(ch_info)) {
4067                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4068                                        scan_ch->channel);
4069                         continue;
4070                 }
4071
4072                 if (!is_active || is_channel_passive(ch_info) ||
4073                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4074                         scan_ch->type = 0;      /* passive */
4075                 else
4076                         scan_ch->type = 1;      /* active */
4077
4078                 if (scan_ch->type & 1)
4079                         scan_ch->type |= (direct_mask << 1);
4080
4081                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4082                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4083
4084                 /* Set txpower levels to defaults */
4085                 scan_ch->tpc.dsp_atten = 110;
4086                 /* scan_pwr_info->tpc.dsp_atten; */
4087
4088                 /*scan_pwr_info->tpc.tx_gain; */
4089                 if (band == IEEE80211_BAND_5GHZ)
4090                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4091                 else {
4092                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4093                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4094                          * power level:
4095                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4096                          */
4097                 }
4098
4099                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4100                                scan_ch->channel,
4101                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4102                                (scan_ch->type & 1) ?
4103                                active_dwell : passive_dwell);
4104
4105                 scan_ch++;
4106                 added++;
4107         }
4108
4109         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4110         return added;
4111 }
4112
4113 /******************************************************************************
4114  *
4115  * uCode download functions
4116  *
4117  ******************************************************************************/
4118
4119 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4120 {
4121         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4122         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4123         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4124         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4125         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4126         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4127 }
4128
4129 static void iwl4965_nic_start(struct iwl_priv *priv)
4130 {
4131         /* Remove all resets to allow NIC to operate */
4132         iwl_write32(priv, CSR_RESET, 0);
4133 }
4134
4135
4136 /**
4137  * iwl4965_read_ucode - Read uCode images from disk file.
4138  *
4139  * Copy into buffers for card to fetch via bus-mastering
4140  */
4141 static int iwl4965_read_ucode(struct iwl_priv *priv)
4142 {
4143         struct iwl4965_ucode *ucode;
4144         int ret;
4145         const struct firmware *ucode_raw;
4146         const char *name = priv->cfg->fw_name;
4147         u8 *src;
4148         size_t len;
4149         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4150
4151         /* Ask kernel firmware_class module to get the boot firmware off disk.
4152          * request_firmware() is synchronous, file is in memory on return. */
4153         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4154         if (ret < 0) {
4155                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4156                                         name, ret);
4157                 goto error;
4158         }
4159
4160         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4161                        name, ucode_raw->size);
4162
4163         /* Make sure that we got at least our header! */
4164         if (ucode_raw->size < sizeof(*ucode)) {
4165                 IWL_ERROR("File size way too small!\n");
4166                 ret = -EINVAL;
4167                 goto err_release;
4168         }
4169
4170         /* Data from ucode file:  header followed by uCode images */
4171         ucode = (void *)ucode_raw->data;
4172
4173         ver = le32_to_cpu(ucode->ver);
4174         inst_size = le32_to_cpu(ucode->inst_size);
4175         data_size = le32_to_cpu(ucode->data_size);
4176         init_size = le32_to_cpu(ucode->init_size);
4177         init_data_size = le32_to_cpu(ucode->init_data_size);
4178         boot_size = le32_to_cpu(ucode->boot_size);
4179
4180         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4181         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4182                        inst_size);
4183         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4184                        data_size);
4185         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4186                        init_size);
4187         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4188                        init_data_size);
4189         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4190                        boot_size);
4191
4192         /* Verify size of file vs. image size info in file's header */
4193         if (ucode_raw->size < sizeof(*ucode) +
4194                 inst_size + data_size + init_size +
4195                 init_data_size + boot_size) {
4196
4197                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4198                                (int)ucode_raw->size);
4199                 ret = -EINVAL;
4200                 goto err_release;
4201         }
4202
4203         /* Verify that uCode images will fit in card's SRAM */
4204         if (inst_size > priv->hw_params.max_inst_size) {
4205                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4206                                inst_size);
4207                 ret = -EINVAL;
4208                 goto err_release;
4209         }
4210
4211         if (data_size > priv->hw_params.max_data_size) {
4212                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4213                                 data_size);
4214                 ret = -EINVAL;
4215                 goto err_release;
4216         }
4217         if (init_size > priv->hw_params.max_inst_size) {
4218                 IWL_DEBUG_INFO
4219                     ("uCode init instr len %d too large to fit in\n",
4220                       init_size);
4221                 ret = -EINVAL;
4222                 goto err_release;
4223         }
4224         if (init_data_size > priv->hw_params.max_data_size) {
4225                 IWL_DEBUG_INFO
4226                     ("uCode init data len %d too large to fit in\n",
4227                       init_data_size);
4228                 ret = -EINVAL;
4229                 goto err_release;
4230         }
4231         if (boot_size > priv->hw_params.max_bsm_size) {
4232                 IWL_DEBUG_INFO
4233                     ("uCode boot instr len %d too large to fit in\n",
4234                       boot_size);
4235                 ret = -EINVAL;
4236                 goto err_release;
4237         }
4238
4239         /* Allocate ucode buffers for card's bus-master loading ... */
4240
4241         /* Runtime instructions and 2 copies of data:
4242          * 1) unmodified from disk
4243          * 2) backup cache for save/restore during power-downs */
4244         priv->ucode_code.len = inst_size;
4245         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4246
4247         priv->ucode_data.len = data_size;
4248         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4249
4250         priv->ucode_data_backup.len = data_size;
4251         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4252
4253         /* Initialization instructions and data */
4254         if (init_size && init_data_size) {
4255                 priv->ucode_init.len = init_size;
4256                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4257
4258                 priv->ucode_init_data.len = init_data_size;
4259                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4260
4261                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4262                         goto err_pci_alloc;
4263         }
4264
4265         /* Bootstrap (instructions only, no data) */
4266         if (boot_size) {
4267                 priv->ucode_boot.len = boot_size;
4268                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4269
4270                 if (!priv->ucode_boot.v_addr)
4271                         goto err_pci_alloc;
4272         }
4273
4274         /* Copy images into buffers for card's bus-master reads ... */
4275
4276         /* Runtime instructions (first block of data in file) */
4277         src = &ucode->data[0];
4278         len = priv->ucode_code.len;
4279         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4280         memcpy(priv->ucode_code.v_addr, src, len);
4281         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4282                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4283
4284         /* Runtime data (2nd block)
4285          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4286         src = &ucode->data[inst_size];
4287         len = priv->ucode_data.len;
4288         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4289         memcpy(priv->ucode_data.v_addr, src, len);
4290         memcpy(priv->ucode_data_backup.v_addr, src, len);
4291
4292         /* Initialization instructions (3rd block) */
4293         if (init_size) {
4294                 src = &ucode->data[inst_size + data_size];
4295                 len = priv->ucode_init.len;
4296                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4297                                 len);
4298                 memcpy(priv->ucode_init.v_addr, src, len);
4299         }
4300
4301         /* Initialization data (4th block) */
4302         if (init_data_size) {
4303                 src = &ucode->data[inst_size + data_size + init_size];
4304                 len = priv->ucode_init_data.len;
4305                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4306                                len);
4307                 memcpy(priv->ucode_init_data.v_addr, src, len);
4308         }
4309
4310         /* Bootstrap instructions (5th block) */
4311         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4312         len = priv->ucode_boot.len;
4313         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4314         memcpy(priv->ucode_boot.v_addr, src, len);
4315
4316         /* We have our copies now, allow OS release its copies */
4317         release_firmware(ucode_raw);
4318         return 0;
4319
4320  err_pci_alloc:
4321         IWL_ERROR("failed to allocate pci memory\n");
4322         ret = -ENOMEM;
4323         iwl4965_dealloc_ucode_pci(priv);
4324
4325  err_release:
4326         release_firmware(ucode_raw);
4327
4328  error:
4329         return ret;
4330 }
4331
4332
4333 /**
4334  * iwl4965_set_ucode_ptrs - Set uCode address location
4335  *
4336  * Tell initialization uCode where to find runtime uCode.
4337  *
4338  * BSM registers initially contain pointers to initialization uCode.
4339  * We need to replace them to load runtime uCode inst and data,
4340  * and to save runtime data when powering down.
4341  */
4342 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4343 {
4344         dma_addr_t pinst;
4345         dma_addr_t pdata;
4346         int rc = 0;
4347         unsigned long flags;
4348
4349         /* bits 35:4 for 4965 */
4350         pinst = priv->ucode_code.p_addr >> 4;
4351         pdata = priv->ucode_data_backup.p_addr >> 4;
4352
4353         spin_lock_irqsave(&priv->lock, flags);
4354         rc = iwl_grab_nic_access(priv);
4355         if (rc) {
4356                 spin_unlock_irqrestore(&priv->lock, flags);
4357                 return rc;
4358         }
4359
4360         /* Tell bootstrap uCode where to find image to load */
4361         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4362         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4363         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4364                                  priv->ucode_data.len);
4365
4366         /* Inst bytecount must be last to set up, bit 31 signals uCode
4367          *   that all new ptr/size info is in place */
4368         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4369                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4370
4371         iwl_release_nic_access(priv);
4372
4373         spin_unlock_irqrestore(&priv->lock, flags);
4374
4375         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4376
4377         return rc;
4378 }
4379
4380 /**
4381  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4382  *
4383  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4384  *
4385  * The 4965 "initialize" ALIVE reply contains calibration data for:
4386  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4387  *   (3945 does not contain this data).
4388  *
4389  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4390 */
4391 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4392 {
4393         /* Check alive response for "valid" sign from uCode */
4394         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4395                 /* We had an error bringing up the hardware, so take it
4396                  * all the way back down so we can try again */
4397                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4398                 goto restart;
4399         }
4400
4401         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4402          * This is a paranoid check, because we would not have gotten the
4403          * "initialize" alive if code weren't properly loaded.  */
4404         if (iwl_verify_ucode(priv)) {
4405                 /* Runtime instruction load was bad;
4406                  * take it all the way back down so we can try again */
4407                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4408                 goto restart;
4409         }
4410
4411         /* Calculate temperature */
4412         priv->temperature = iwl4965_get_temperature(priv);
4413
4414         /* Send pointers to protocol/runtime uCode image ... init code will
4415          * load and launch runtime uCode, which will send us another "Alive"
4416          * notification. */
4417         IWL_DEBUG_INFO("Initialization Alive received.\n");
4418         if (iwl4965_set_ucode_ptrs(priv)) {
4419                 /* Runtime instruction load won't happen;
4420                  * take it all the way back down so we can try again */
4421                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4422                 goto restart;
4423         }
4424         return;
4425
4426  restart:
4427         queue_work(priv->workqueue, &priv->restart);
4428 }
4429
4430
4431 /**
4432  * iwl4965_alive_start - called after REPLY_ALIVE notification received
4433  *                   from protocol/runtime uCode (initialization uCode's
4434  *                   Alive gets handled by iwl4965_init_alive_start()).
4435  */
4436 static void iwl4965_alive_start(struct iwl_priv *priv)
4437 {
4438         int ret = 0;
4439
4440         IWL_DEBUG_INFO("Runtime Alive received.\n");
4441
4442         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4443                 /* We had an error bringing up the hardware, so take it
4444                  * all the way back down so we can try again */
4445                 IWL_DEBUG_INFO("Alive failed.\n");
4446                 goto restart;
4447         }
4448
4449         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4450          * This is a paranoid check, because we would not have gotten the
4451          * "runtime" alive if code weren't properly loaded.  */
4452         if (iwl_verify_ucode(priv)) {
4453                 /* Runtime instruction load was bad;
4454                  * take it all the way back down so we can try again */
4455                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4456                 goto restart;
4457         }
4458
4459         iwlcore_clear_stations_table(priv);
4460
4461         ret = priv->cfg->ops->lib->alive_notify(priv);
4462         if (ret) {
4463                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4464                             ret);
4465                 goto restart;
4466         }
4467
4468         /* After the ALIVE response, we can send host commands to 4965 uCode */
4469         set_bit(STATUS_ALIVE, &priv->status);
4470
4471         /* Clear out the uCode error bit if it is set */
4472         clear_bit(STATUS_FW_ERROR, &priv->status);
4473
4474         if (iwl_is_rfkill(priv))
4475                 return;
4476
4477         ieee80211_start_queues(priv->hw);
4478
4479         priv->active_rate = priv->rates_mask;
4480         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4481
4482         if (iwl_is_associated(priv)) {
4483                 struct iwl4965_rxon_cmd *active_rxon =
4484                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4485
4486                 memcpy(&priv->staging_rxon, &priv->active_rxon,
4487                        sizeof(priv->staging_rxon));
4488                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4489         } else {
4490                 /* Initialize our rx_config data */
4491                 iwl4965_connection_init_rx_config(priv);
4492                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4493         }
4494
4495         /* Configure Bluetooth device coexistence support */
4496         iwl4965_send_bt_config(priv);
4497
4498         /* Configure the adapter for unassociated operation */
4499         iwl4965_commit_rxon(priv);
4500
4501         /* At this point, the NIC is initialized and operational */
4502         priv->notif_missed_beacons = 0;
4503
4504         iwl4965_rf_kill_ct_config(priv);
4505
4506         iwl_leds_register(priv);
4507
4508         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4509         set_bit(STATUS_READY, &priv->status);
4510         wake_up_interruptible(&priv->wait_command_queue);
4511
4512         if (priv->error_recovering)
4513                 iwl4965_error_recovery(priv);
4514
4515         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4516         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4517         return;
4518
4519  restart:
4520         queue_work(priv->workqueue, &priv->restart);
4521 }
4522
4523 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4524
4525 static void __iwl4965_down(struct iwl_priv *priv)
4526 {
4527         unsigned long flags;
4528         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4529         struct ieee80211_conf *conf = NULL;
4530
4531         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4532
4533         conf = ieee80211_get_hw_conf(priv->hw);
4534
4535         if (!exit_pending)
4536                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4537
4538         iwl_leds_unregister(priv);
4539
4540         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4541
4542         iwlcore_clear_stations_table(priv);
4543
4544         /* Unblock any waiting calls */
4545         wake_up_interruptible_all(&priv->wait_command_queue);
4546
4547         /* Wipe out the EXIT_PENDING status bit if we are not actually
4548          * exiting the module */
4549         if (!exit_pending)
4550                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4551
4552         /* stop and reset the on-board processor */
4553         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4554
4555         /* tell the device to stop sending interrupts */
4556         spin_lock_irqsave(&priv->lock, flags);
4557         iwl4965_disable_interrupts(priv);
4558         spin_unlock_irqrestore(&priv->lock, flags);
4559         iwl_synchronize_irq(priv);
4560
4561         if (priv->mac80211_registered)
4562                 ieee80211_stop_queues(priv->hw);
4563
4564         /* If we have not previously called iwl4965_init() then
4565          * clear all bits but the RF Kill and SUSPEND bits and return */
4566         if (!iwl_is_init(priv)) {
4567                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4568                                         STATUS_RF_KILL_HW |
4569                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4570                                         STATUS_RF_KILL_SW |
4571                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4572                                         STATUS_GEO_CONFIGURED |
4573                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4574                                         STATUS_IN_SUSPEND;
4575                 goto exit;
4576         }
4577
4578         /* ...otherwise clear out all the status bits but the RF Kill and
4579          * SUSPEND bits and continue taking the NIC down. */
4580         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4581                                 STATUS_RF_KILL_HW |
4582                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4583                                 STATUS_RF_KILL_SW |
4584                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4585                                 STATUS_GEO_CONFIGURED |
4586                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4587                                 STATUS_IN_SUSPEND |
4588                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4589                                 STATUS_FW_ERROR;
4590
4591         spin_lock_irqsave(&priv->lock, flags);
4592         iwl_clear_bit(priv, CSR_GP_CNTRL,
4593                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4594         spin_unlock_irqrestore(&priv->lock, flags);
4595
4596         iwl4965_hw_txq_ctx_stop(priv);
4597         iwl4965_hw_rxq_stop(priv);
4598
4599         spin_lock_irqsave(&priv->lock, flags);
4600         if (!iwl_grab_nic_access(priv)) {
4601                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4602                                          APMG_CLK_VAL_DMA_CLK_RQT);
4603                 iwl_release_nic_access(priv);
4604         }
4605         spin_unlock_irqrestore(&priv->lock, flags);
4606
4607         udelay(5);
4608
4609         iwl4965_hw_nic_stop_master(priv);
4610         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4611         iwl4965_hw_nic_reset(priv);
4612         priv->cfg->ops->lib->free_shared_mem(priv);
4613
4614  exit:
4615         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
4616
4617         if (priv->ibss_beacon)
4618                 dev_kfree_skb(priv->ibss_beacon);
4619         priv->ibss_beacon = NULL;
4620
4621         /* clear out any free frames */
4622         iwl4965_clear_free_frames(priv);
4623 }
4624
4625 static void iwl4965_down(struct iwl_priv *priv)
4626 {
4627         mutex_lock(&priv->mutex);
4628         __iwl4965_down(priv);
4629         mutex_unlock(&priv->mutex);
4630
4631         iwl4965_cancel_deferred_work(priv);
4632 }
4633
4634 #define MAX_HW_RESTARTS 5
4635
4636 static int __iwl4965_up(struct iwl_priv *priv)
4637 {
4638         int i;
4639         int ret;
4640
4641         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4642                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
4643                 return -EIO;
4644         }
4645
4646         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
4647                 IWL_WARNING("Radio disabled by SW RF kill (module "
4648                             "parameter)\n");
4649                 iwl_rfkill_set_hw_state(priv);
4650                 return -ENODEV;
4651         }
4652
4653         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
4654                 IWL_ERROR("ucode not available for device bringup\n");
4655                 return -EIO;
4656         }
4657
4658         /* If platform's RF_KILL switch is NOT set to KILL */
4659         if (iwl_read32(priv, CSR_GP_CNTRL) &
4660                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
4661                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4662         else {
4663                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4664                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
4665                         iwl_rfkill_set_hw_state(priv);
4666                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
4667                         return -ENODEV;
4668                 }
4669         }
4670
4671         iwl_rfkill_set_hw_state(priv);
4672         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4673
4674         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
4675         if (ret) {
4676                 IWL_ERROR("Unable to allocate shared memory\n");
4677                 return ret;
4678         }
4679
4680         ret = priv->cfg->ops->lib->hw_nic_init(priv);
4681         if (ret) {
4682                 IWL_ERROR("Unable to init nic\n");
4683                 return ret;
4684         }
4685
4686         /* make sure rfkill handshake bits are cleared */
4687         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4688         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4689                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4690
4691         /* clear (again), then enable host interrupts */
4692         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4693         iwl4965_enable_interrupts(priv);
4694
4695         /* really make sure rfkill handshake bits are cleared */
4696         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4697         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4698
4699         /* Copy original ucode data image from disk into backup cache.
4700          * This will be used to initialize the on-board processor's
4701          * data SRAM for a clean start when the runtime program first loads. */
4702         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
4703                priv->ucode_data.len);
4704
4705         /* We return success when we resume from suspend and rf_kill is on. */
4706         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
4707                 return 0;
4708
4709         for (i = 0; i < MAX_HW_RESTARTS; i++) {
4710
4711                 iwlcore_clear_stations_table(priv);
4712
4713                 /* load bootstrap state machine,
4714                  * load bootstrap program into processor's memory,
4715                  * prepare to load the "initialize" uCode */
4716                 ret = priv->cfg->ops->lib->load_ucode(priv);
4717
4718                 if (ret) {
4719                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
4720                         continue;
4721                 }
4722
4723                 /* start card; "initialize" will load runtime ucode */
4724                 iwl4965_nic_start(priv);
4725
4726                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
4727
4728                 return 0;
4729         }
4730
4731         set_bit(STATUS_EXIT_PENDING, &priv->status);
4732         __iwl4965_down(priv);
4733
4734         /* tried to restart and config the device for as long as our
4735          * patience could withstand */
4736         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
4737         return -EIO;
4738 }
4739
4740
4741 /*****************************************************************************
4742  *
4743  * Workqueue callbacks
4744  *
4745  *****************************************************************************/
4746
4747 static void iwl4965_bg_init_alive_start(struct work_struct *data)
4748 {
4749         struct iwl_priv *priv =
4750             container_of(data, struct iwl_priv, init_alive_start.work);
4751
4752         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4753                 return;
4754
4755         mutex_lock(&priv->mutex);
4756         iwl4965_init_alive_start(priv);
4757         mutex_unlock(&priv->mutex);
4758 }
4759
4760 static void iwl4965_bg_alive_start(struct work_struct *data)
4761 {
4762         struct iwl_priv *priv =
4763             container_of(data, struct iwl_priv, alive_start.work);
4764
4765         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4766                 return;
4767
4768         mutex_lock(&priv->mutex);
4769         iwl4965_alive_start(priv);
4770         mutex_unlock(&priv->mutex);
4771 }
4772
4773 static void iwl4965_bg_rf_kill(struct work_struct *work)
4774 {
4775         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
4776
4777         wake_up_interruptible(&priv->wait_command_queue);
4778
4779         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4780                 return;
4781
4782         mutex_lock(&priv->mutex);
4783
4784         if (!iwl_is_rfkill(priv)) {
4785                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
4786                           "HW and/or SW RF Kill no longer active, restarting "
4787                           "device\n");
4788                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4789                         queue_work(priv->workqueue, &priv->restart);
4790         } else {
4791                 /* make sure mac80211 stop sending Tx frame */
4792                 if (priv->mac80211_registered)
4793                         ieee80211_stop_queues(priv->hw);
4794
4795                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
4796                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
4797                                           "disabled by SW switch\n");
4798                 else
4799                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
4800                                     "Kill switch must be turned off for "
4801                                     "wireless networking to work.\n");
4802         }
4803         iwl_rfkill_set_hw_state(priv);
4804
4805         mutex_unlock(&priv->mutex);
4806 }
4807
4808 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
4809
4810 static void iwl4965_bg_scan_check(struct work_struct *data)
4811 {
4812         struct iwl_priv *priv =
4813             container_of(data, struct iwl_priv, scan_check.work);
4814
4815         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4816                 return;
4817
4818         mutex_lock(&priv->mutex);
4819         if (test_bit(STATUS_SCANNING, &priv->status) ||
4820             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4821                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
4822                           "Scan completion watchdog resetting adapter (%dms)\n",
4823                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
4824
4825                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4826                         iwl4965_send_scan_abort(priv);
4827         }
4828         mutex_unlock(&priv->mutex);
4829 }
4830
4831 static void iwl4965_bg_request_scan(struct work_struct *data)
4832 {
4833         struct iwl_priv *priv =
4834             container_of(data, struct iwl_priv, request_scan);
4835         struct iwl_host_cmd cmd = {
4836                 .id = REPLY_SCAN_CMD,
4837                 .len = sizeof(struct iwl4965_scan_cmd),
4838                 .meta.flags = CMD_SIZE_HUGE,
4839         };
4840         struct iwl4965_scan_cmd *scan;
4841         struct ieee80211_conf *conf = NULL;
4842         u16 cmd_len;
4843         enum ieee80211_band band;
4844         u8 direct_mask;
4845         int ret = 0;
4846
4847         conf = ieee80211_get_hw_conf(priv->hw);
4848
4849         mutex_lock(&priv->mutex);
4850
4851         if (!iwl_is_ready(priv)) {
4852                 IWL_WARNING("request scan called when driver not ready.\n");
4853                 goto done;
4854         }
4855
4856         /* Make sure the scan wasn't cancelled before this queued work
4857          * was given the chance to run... */
4858         if (!test_bit(STATUS_SCANNING, &priv->status))
4859                 goto done;
4860
4861         /* This should never be called or scheduled if there is currently
4862          * a scan active in the hardware. */
4863         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
4864                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
4865                                "Ignoring second request.\n");
4866                 ret = -EIO;
4867                 goto done;
4868         }
4869
4870         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4871                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
4872                 goto done;
4873         }
4874
4875         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4876                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
4877                 goto done;
4878         }
4879
4880         if (iwl_is_rfkill(priv)) {
4881                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
4882                 goto done;
4883         }
4884
4885         if (!test_bit(STATUS_READY, &priv->status)) {
4886                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
4887                 goto done;
4888         }
4889
4890         if (!priv->scan_bands) {
4891                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
4892                 goto done;
4893         }
4894
4895         if (!priv->scan) {
4896                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
4897                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
4898                 if (!priv->scan) {
4899                         ret = -ENOMEM;
4900                         goto done;
4901                 }
4902         }
4903         scan = priv->scan;
4904         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
4905
4906         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
4907         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
4908
4909         if (iwl_is_associated(priv)) {
4910                 u16 interval = 0;
4911                 u32 extra;
4912                 u32 suspend_time = 100;
4913                 u32 scan_suspend_time = 100;
4914                 unsigned long flags;
4915
4916                 IWL_DEBUG_INFO("Scanning while associated...\n");
4917
4918                 spin_lock_irqsave(&priv->lock, flags);
4919                 interval = priv->beacon_int;
4920                 spin_unlock_irqrestore(&priv->lock, flags);
4921
4922                 scan->suspend_time = 0;
4923                 scan->max_out_time = cpu_to_le32(200 * 1024);
4924                 if (!interval)
4925                         interval = suspend_time;
4926
4927                 extra = (suspend_time / interval) << 22;
4928                 scan_suspend_time = (extra |
4929                     ((suspend_time % interval) * 1024));
4930                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
4931                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
4932                                scan_suspend_time, interval);
4933         }
4934
4935         /* We should add the ability for user to lock to PASSIVE ONLY */
4936         if (priv->one_direct_scan) {
4937                 IWL_DEBUG_SCAN
4938                     ("Kicking off one direct scan for '%s'\n",
4939                      iwl4965_escape_essid(priv->direct_ssid,
4940                                       priv->direct_ssid_len));
4941                 scan->direct_scan[0].id = WLAN_EID_SSID;
4942                 scan->direct_scan[0].len = priv->direct_ssid_len;
4943                 memcpy(scan->direct_scan[0].ssid,
4944                        priv->direct_ssid, priv->direct_ssid_len);
4945                 direct_mask = 1;
4946         } else if (!iwl_is_associated(priv) && priv->essid_len) {
4947                 IWL_DEBUG_SCAN
4948                   ("Kicking off one direct scan for '%s' when not associated\n",
4949                    iwl4965_escape_essid(priv->essid, priv->essid_len));
4950                 scan->direct_scan[0].id = WLAN_EID_SSID;
4951                 scan->direct_scan[0].len = priv->essid_len;
4952                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
4953                 direct_mask = 1;
4954         } else {
4955                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
4956                 direct_mask = 0;
4957         }
4958
4959         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
4960         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
4961         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
4962
4963
4964         switch (priv->scan_bands) {
4965         case 2:
4966                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
4967                 scan->tx_cmd.rate_n_flags =
4968                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
4969                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
4970
4971                 scan->good_CRC_th = 0;
4972                 band = IEEE80211_BAND_2GHZ;
4973                 break;
4974
4975         case 1:
4976                 scan->tx_cmd.rate_n_flags =
4977                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
4978                                 RATE_MCS_ANT_B_MSK);
4979                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
4980                 band = IEEE80211_BAND_5GHZ;
4981                 break;
4982
4983         default:
4984                 IWL_WARNING("Invalid scan band count\n");
4985                 goto done;
4986         }
4987
4988         /* We don't build a direct scan probe request; the uCode will do
4989          * that based on the direct_mask added to each channel entry */
4990         cmd_len = iwl4965_fill_probe_req(priv, band,
4991                                         (struct ieee80211_mgmt *)scan->data,
4992                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
4993
4994         scan->tx_cmd.len = cpu_to_le16(cmd_len);
4995         /* select Rx chains */
4996
4997         /* Force use of chains B and C (0x6) for scan Rx.
4998          * Avoid A (0x1) because of its off-channel reception on A-band.
4999          * MIMO is not used here, but value is required to make uCode happy. */
5000         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5001                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5002                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5003                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5004
5005         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5006                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5007
5008         if (direct_mask)
5009                 scan->channel_count =
5010                         iwl4965_get_channels_for_scan(
5011                                 priv, band, 1, /* active */
5012                                 direct_mask,
5013                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5014         else
5015                 scan->channel_count =
5016                         iwl4965_get_channels_for_scan(
5017                                 priv, band, 0, /* passive */
5018                                 direct_mask,
5019                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5020
5021         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5022                                RXON_FILTER_BCON_AWARE_MSK);
5023         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5024             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5025         cmd.data = scan;
5026         scan->len = cpu_to_le16(cmd.len);
5027
5028         set_bit(STATUS_SCAN_HW, &priv->status);
5029         ret = iwl_send_cmd_sync(priv, &cmd);
5030         if (ret)
5031                 goto done;
5032
5033         queue_delayed_work(priv->workqueue, &priv->scan_check,
5034                            IWL_SCAN_CHECK_WATCHDOG);
5035
5036         mutex_unlock(&priv->mutex);
5037         return;
5038
5039  done:
5040         /* inform mac80211 scan aborted */
5041         queue_work(priv->workqueue, &priv->scan_completed);
5042         mutex_unlock(&priv->mutex);
5043 }
5044
5045 static void iwl4965_bg_up(struct work_struct *data)
5046 {
5047         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5048
5049         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5050                 return;
5051
5052         mutex_lock(&priv->mutex);
5053         __iwl4965_up(priv);
5054         mutex_unlock(&priv->mutex);
5055 }
5056
5057 static void iwl4965_bg_restart(struct work_struct *data)
5058 {
5059         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5060
5061         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5062                 return;
5063
5064         iwl4965_down(priv);
5065         queue_work(priv->workqueue, &priv->up);
5066 }
5067
5068 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5069 {
5070         struct iwl_priv *priv =
5071             container_of(data, struct iwl_priv, rx_replenish);
5072
5073         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5074                 return;
5075
5076         mutex_lock(&priv->mutex);
5077         iwl_rx_replenish(priv);
5078         mutex_unlock(&priv->mutex);
5079 }
5080
5081 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5082
5083 static void iwl4965_post_associate(struct iwl_priv *priv)
5084 {
5085         struct ieee80211_conf *conf = NULL;
5086         int ret = 0;
5087         DECLARE_MAC_BUF(mac);
5088
5089         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5090                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5091                 return;
5092         }
5093
5094         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5095                         priv->assoc_id,
5096                         print_mac(mac, priv->active_rxon.bssid_addr));
5097
5098
5099         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5100                 return;
5101
5102
5103         if (!priv->vif || !priv->is_open)
5104                 return;
5105
5106         iwl4965_scan_cancel_timeout(priv, 200);
5107
5108         conf = ieee80211_get_hw_conf(priv->hw);
5109
5110         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5111         iwl4965_commit_rxon(priv);
5112
5113         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5114         iwl4965_setup_rxon_timing(priv);
5115         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5116                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5117         if (ret)
5118                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5119                             "Attempting to continue.\n");
5120
5121         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5122
5123 #ifdef CONFIG_IWL4965_HT
5124         if (priv->current_ht_config.is_ht)
5125                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
5126 #endif /* CONFIG_IWL4965_HT*/
5127         iwl_set_rxon_chain(priv);
5128         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5129
5130         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5131                         priv->assoc_id, priv->beacon_int);
5132
5133         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5134                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5135         else
5136                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5137
5138         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5139                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5140                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5141                 else
5142                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5143
5144                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5145                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5146
5147         }
5148
5149         iwl4965_commit_rxon(priv);
5150
5151         switch (priv->iw_mode) {
5152         case IEEE80211_IF_TYPE_STA:
5153                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5154                 break;
5155
5156         case IEEE80211_IF_TYPE_IBSS:
5157
5158                 /* clear out the station table */
5159                 iwlcore_clear_stations_table(priv);
5160
5161                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5162                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5163                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5164                 iwl4965_send_beacon_cmd(priv);
5165
5166                 break;
5167
5168         default:
5169                 IWL_ERROR("%s Should not be called in %d mode\n",
5170                                 __FUNCTION__, priv->iw_mode);
5171                 break;
5172         }
5173
5174         iwl4965_sequence_reset(priv);
5175
5176         /* Enable Rx differential gain and sensitivity calibrations */
5177         iwl_chain_noise_reset(priv);
5178         priv->start_calib = 1;
5179
5180         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5181                 priv->assoc_station_added = 1;
5182
5183         iwl4965_activate_qos(priv, 0);
5184
5185         iwl_power_update_mode(priv, 0);
5186         /* we have just associated, don't start scan too early */
5187         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5188 }
5189
5190
5191 static void iwl4965_bg_post_associate(struct work_struct *data)
5192 {
5193         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5194                                              post_associate.work);
5195
5196         mutex_lock(&priv->mutex);
5197         iwl4965_post_associate(priv);
5198         mutex_unlock(&priv->mutex);
5199
5200 }
5201
5202 static void iwl4965_bg_abort_scan(struct work_struct *work)
5203 {
5204         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5205
5206         if (!iwl_is_ready(priv))
5207                 return;
5208
5209         mutex_lock(&priv->mutex);
5210
5211         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5212         iwl4965_send_scan_abort(priv);
5213
5214         mutex_unlock(&priv->mutex);
5215 }
5216
5217 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5218
5219 static void iwl4965_bg_scan_completed(struct work_struct *work)
5220 {
5221         struct iwl_priv *priv =
5222             container_of(work, struct iwl_priv, scan_completed);
5223
5224         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5225
5226         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5227                 return;
5228
5229         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5230                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5231
5232         ieee80211_scan_completed(priv->hw);
5233
5234         /* Since setting the TXPOWER may have been deferred while
5235          * performing the scan, fire one off */
5236         mutex_lock(&priv->mutex);
5237         iwl4965_hw_reg_send_txpower(priv);
5238         mutex_unlock(&priv->mutex);
5239 }
5240
5241 /*****************************************************************************
5242  *
5243  * mac80211 entry point functions
5244  *
5245  *****************************************************************************/
5246
5247 #define UCODE_READY_TIMEOUT     (2 * HZ)
5248
5249 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5250 {
5251         struct iwl_priv *priv = hw->priv;
5252         int ret;
5253
5254         IWL_DEBUG_MAC80211("enter\n");
5255
5256         if (pci_enable_device(priv->pci_dev)) {
5257                 IWL_ERROR("Fail to pci_enable_device\n");
5258                 return -ENODEV;
5259         }
5260         pci_restore_state(priv->pci_dev);
5261         pci_enable_msi(priv->pci_dev);
5262
5263         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5264                           DRV_NAME, priv);
5265         if (ret) {
5266                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5267                 goto out_disable_msi;
5268         }
5269
5270         /* we should be verifying the device is ready to be opened */
5271         mutex_lock(&priv->mutex);
5272
5273         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5274         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5275          * ucode filename and max sizes are card-specific. */
5276
5277         if (!priv->ucode_code.len) {
5278                 ret = iwl4965_read_ucode(priv);
5279                 if (ret) {
5280                         IWL_ERROR("Could not read microcode: %d\n", ret);
5281                         mutex_unlock(&priv->mutex);
5282                         goto out_release_irq;
5283                 }
5284         }
5285
5286         ret = __iwl4965_up(priv);
5287
5288         mutex_unlock(&priv->mutex);
5289
5290         if (ret)
5291                 goto out_release_irq;
5292
5293         IWL_DEBUG_INFO("Start UP work done.\n");
5294
5295         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5296                 return 0;
5297
5298         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5299          * mac80211 will not be run successfully. */
5300         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5301                         test_bit(STATUS_READY, &priv->status),
5302                         UCODE_READY_TIMEOUT);
5303         if (!ret) {
5304                 if (!test_bit(STATUS_READY, &priv->status)) {
5305                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5306                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5307                         ret = -ETIMEDOUT;
5308                         goto out_release_irq;
5309                 }
5310         }
5311
5312         priv->is_open = 1;
5313         IWL_DEBUG_MAC80211("leave\n");
5314         return 0;
5315
5316 out_release_irq:
5317         free_irq(priv->pci_dev->irq, priv);
5318 out_disable_msi:
5319         pci_disable_msi(priv->pci_dev);
5320         pci_disable_device(priv->pci_dev);
5321         priv->is_open = 0;
5322         IWL_DEBUG_MAC80211("leave - failed\n");
5323         return ret;
5324 }
5325
5326 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5327 {
5328         struct iwl_priv *priv = hw->priv;
5329
5330         IWL_DEBUG_MAC80211("enter\n");
5331
5332         if (!priv->is_open) {
5333                 IWL_DEBUG_MAC80211("leave - skip\n");
5334                 return;
5335         }
5336
5337         priv->is_open = 0;
5338
5339         if (iwl_is_ready_rf(priv)) {
5340                 /* stop mac, cancel any scan request and clear
5341                  * RXON_FILTER_ASSOC_MSK BIT
5342                  */
5343                 mutex_lock(&priv->mutex);
5344                 iwl4965_scan_cancel_timeout(priv, 100);
5345                 cancel_delayed_work(&priv->post_associate);
5346                 mutex_unlock(&priv->mutex);
5347         }
5348
5349         iwl4965_down(priv);
5350
5351         flush_workqueue(priv->workqueue);
5352         free_irq(priv->pci_dev->irq, priv);
5353         pci_disable_msi(priv->pci_dev);
5354         pci_save_state(priv->pci_dev);
5355         pci_disable_device(priv->pci_dev);
5356
5357         IWL_DEBUG_MAC80211("leave\n");
5358 }
5359
5360 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5361                       struct ieee80211_tx_control *ctl)
5362 {
5363         struct iwl_priv *priv = hw->priv;
5364
5365         IWL_DEBUG_MAC80211("enter\n");
5366
5367         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5368                 IWL_DEBUG_MAC80211("leave - monitor\n");
5369                 return -1;
5370         }
5371
5372         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5373                      ctl->tx_rate->bitrate);
5374
5375         if (iwl4965_tx_skb(priv, skb, ctl))
5376                 dev_kfree_skb_any(skb);
5377
5378         IWL_DEBUG_MAC80211("leave\n");
5379         return 0;
5380 }
5381
5382 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5383                                  struct ieee80211_if_init_conf *conf)
5384 {
5385         struct iwl_priv *priv = hw->priv;
5386         unsigned long flags;
5387         DECLARE_MAC_BUF(mac);
5388
5389         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5390
5391         if (priv->vif) {
5392                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5393                 return -EOPNOTSUPP;
5394         }
5395
5396         spin_lock_irqsave(&priv->lock, flags);
5397         priv->vif = conf->vif;
5398
5399         spin_unlock_irqrestore(&priv->lock, flags);
5400
5401         mutex_lock(&priv->mutex);
5402
5403         if (conf->mac_addr) {
5404                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5405                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5406         }
5407
5408         if (iwl_is_ready(priv))
5409                 iwl4965_set_mode(priv, conf->type);
5410
5411         mutex_unlock(&priv->mutex);
5412
5413         IWL_DEBUG_MAC80211("leave\n");
5414         return 0;
5415 }
5416
5417 /**
5418  * iwl4965_mac_config - mac80211 config callback
5419  *
5420  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5421  * be set inappropriately and the driver currently sets the hardware up to
5422  * use it whenever needed.
5423  */
5424 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5425 {
5426         struct iwl_priv *priv = hw->priv;
5427         const struct iwl_channel_info *ch_info;
5428         unsigned long flags;
5429         int ret = 0;
5430
5431         mutex_lock(&priv->mutex);
5432         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5433
5434         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5435
5436         if (!iwl_is_ready(priv)) {
5437                 IWL_DEBUG_MAC80211("leave - not ready\n");
5438                 ret = -EIO;
5439                 goto out;
5440         }
5441
5442         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5443                      test_bit(STATUS_SCANNING, &priv->status))) {
5444                 IWL_DEBUG_MAC80211("leave - scanning\n");
5445                 set_bit(STATUS_CONF_PENDING, &priv->status);
5446                 mutex_unlock(&priv->mutex);
5447                 return 0;
5448         }
5449
5450         spin_lock_irqsave(&priv->lock, flags);
5451
5452         ch_info = iwl_get_channel_info(priv, conf->channel->band,
5453                         ieee80211_frequency_to_channel(conf->channel->center_freq));
5454         if (!is_channel_valid(ch_info)) {
5455                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5456                 spin_unlock_irqrestore(&priv->lock, flags);
5457                 ret = -EINVAL;
5458                 goto out;
5459         }
5460
5461 #ifdef CONFIG_IWL4965_HT
5462         /* if we are switching from ht to 2.4 clear flags
5463          * from any ht related info since 2.4 does not
5464          * support ht */
5465         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5466 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5467             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5468 #endif
5469         )
5470                 priv->staging_rxon.flags = 0;
5471 #endif /* CONFIG_IWL4965_HT */
5472
5473         iwl_set_rxon_channel(priv, conf->channel->band,
5474                 ieee80211_frequency_to_channel(conf->channel->center_freq));
5475
5476         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5477
5478         /* The list of supported rates and rate mask can be different
5479          * for each band; since the band may have changed, reset
5480          * the rate mask to what mac80211 lists */
5481         iwl4965_set_rate(priv);
5482
5483         spin_unlock_irqrestore(&priv->lock, flags);
5484
5485 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5486         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5487                 iwl4965_hw_channel_switch(priv, conf->channel);
5488                 goto out;
5489         }
5490 #endif
5491
5492         if (priv->cfg->ops->lib->radio_kill_sw)
5493                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5494
5495         if (!conf->radio_enabled) {
5496                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5497                 goto out;
5498         }
5499
5500         if (iwl_is_rfkill(priv)) {
5501                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5502                 ret = -EIO;
5503                 goto out;
5504         }
5505
5506         iwl4965_set_rate(priv);
5507
5508         if (memcmp(&priv->active_rxon,
5509                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
5510                 iwl4965_commit_rxon(priv);
5511         else
5512                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5513
5514         IWL_DEBUG_MAC80211("leave\n");
5515
5516 out:
5517         clear_bit(STATUS_CONF_PENDING, &priv->status);
5518         mutex_unlock(&priv->mutex);
5519         return ret;
5520 }
5521
5522 static void iwl4965_config_ap(struct iwl_priv *priv)
5523 {
5524         int ret = 0;
5525
5526         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5527                 return;
5528
5529         /* The following should be done only at AP bring up */
5530         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5531
5532                 /* RXON - unassoc (to set timing command) */
5533                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5534                 iwl4965_commit_rxon(priv);
5535
5536                 /* RXON Timing */
5537                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5538                 iwl4965_setup_rxon_timing(priv);
5539                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5540                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
5541                 if (ret)
5542                         IWL_WARNING("REPLY_RXON_TIMING failed - "
5543                                         "Attempting to continue.\n");
5544
5545                 iwl_set_rxon_chain(priv);
5546
5547                 /* FIXME: what should be the assoc_id for AP? */
5548                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5549                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5550                         priv->staging_rxon.flags |=
5551                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5552                 else
5553                         priv->staging_rxon.flags &=
5554                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5555
5556                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5557                         if (priv->assoc_capability &
5558                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5559                                 priv->staging_rxon.flags |=
5560                                         RXON_FLG_SHORT_SLOT_MSK;
5561                         else
5562                                 priv->staging_rxon.flags &=
5563                                         ~RXON_FLG_SHORT_SLOT_MSK;
5564
5565                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5566                                 priv->staging_rxon.flags &=
5567                                         ~RXON_FLG_SHORT_SLOT_MSK;
5568                 }
5569                 /* restore RXON assoc */
5570                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5571                 iwl4965_commit_rxon(priv);
5572                 iwl4965_activate_qos(priv, 1);
5573                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5574         }
5575         iwl4965_send_beacon_cmd(priv);
5576
5577         /* FIXME - we need to add code here to detect a totally new
5578          * configuration, reset the AP, unassoc, rxon timing, assoc,
5579          * clear sta table, add BCAST sta... */
5580 }
5581
5582 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5583                                         struct ieee80211_vif *vif,
5584                                     struct ieee80211_if_conf *conf)
5585 {
5586         struct iwl_priv *priv = hw->priv;
5587         DECLARE_MAC_BUF(mac);
5588         unsigned long flags;
5589         int rc;
5590
5591         if (conf == NULL)
5592                 return -EIO;
5593
5594         if (priv->vif != vif) {
5595                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5596                 return 0;
5597         }
5598
5599         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5600             (!conf->beacon || !conf->ssid_len)) {
5601                 IWL_DEBUG_MAC80211
5602                     ("Leaving in AP mode because HostAPD is not ready.\n");
5603                 return 0;
5604         }
5605
5606         if (!iwl_is_alive(priv))
5607                 return -EAGAIN;
5608
5609         mutex_lock(&priv->mutex);
5610
5611         if (conf->bssid)
5612                 IWL_DEBUG_MAC80211("bssid: %s\n",
5613                                    print_mac(mac, conf->bssid));
5614
5615 /*
5616  * very dubious code was here; the probe filtering flag is never set:
5617  *
5618         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5619             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5620  */
5621
5622         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5623                 if (!conf->bssid) {
5624                         conf->bssid = priv->mac_addr;
5625                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
5626                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
5627                                            print_mac(mac, conf->bssid));
5628                 }
5629                 if (priv->ibss_beacon)
5630                         dev_kfree_skb(priv->ibss_beacon);
5631
5632                 priv->ibss_beacon = conf->beacon;
5633         }
5634
5635         if (iwl_is_rfkill(priv))
5636                 goto done;
5637
5638         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
5639             !is_multicast_ether_addr(conf->bssid)) {
5640                 /* If there is currently a HW scan going on in the background
5641                  * then we need to cancel it else the RXON below will fail. */
5642                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
5643                         IWL_WARNING("Aborted scan still in progress "
5644                                     "after 100ms\n");
5645                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
5646                         mutex_unlock(&priv->mutex);
5647                         return -EAGAIN;
5648                 }
5649                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
5650
5651                 /* TODO: Audit driver for usage of these members and see
5652                  * if mac80211 deprecates them (priv->bssid looks like it
5653                  * shouldn't be there, but I haven't scanned the IBSS code
5654                  * to verify) - jpk */
5655                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
5656
5657                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
5658                         iwl4965_config_ap(priv);
5659                 else {
5660                         rc = iwl4965_commit_rxon(priv);
5661                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
5662                                 iwl4965_rxon_add_station(
5663                                         priv, priv->active_rxon.bssid_addr, 1);
5664                 }
5665
5666         } else {
5667                 iwl4965_scan_cancel_timeout(priv, 100);
5668                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5669                 iwl4965_commit_rxon(priv);
5670         }
5671
5672  done:
5673         spin_lock_irqsave(&priv->lock, flags);
5674         if (!conf->ssid_len)
5675                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5676         else
5677                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
5678
5679         priv->essid_len = conf->ssid_len;
5680         spin_unlock_irqrestore(&priv->lock, flags);
5681
5682         IWL_DEBUG_MAC80211("leave\n");
5683         mutex_unlock(&priv->mutex);
5684
5685         return 0;
5686 }
5687
5688 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
5689                                  unsigned int changed_flags,
5690                                  unsigned int *total_flags,
5691                                  int mc_count, struct dev_addr_list *mc_list)
5692 {
5693         /*
5694          * XXX: dummy
5695          * see also iwl4965_connection_init_rx_config
5696          */
5697         *total_flags = 0;
5698 }
5699
5700 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
5701                                      struct ieee80211_if_init_conf *conf)
5702 {
5703         struct iwl_priv *priv = hw->priv;
5704
5705         IWL_DEBUG_MAC80211("enter\n");
5706
5707         mutex_lock(&priv->mutex);
5708
5709         if (iwl_is_ready_rf(priv)) {
5710                 iwl4965_scan_cancel_timeout(priv, 100);
5711                 cancel_delayed_work(&priv->post_associate);
5712                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5713                 iwl4965_commit_rxon(priv);
5714         }
5715         if (priv->vif == conf->vif) {
5716                 priv->vif = NULL;
5717                 memset(priv->bssid, 0, ETH_ALEN);
5718                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5719                 priv->essid_len = 0;
5720         }
5721         mutex_unlock(&priv->mutex);
5722
5723         IWL_DEBUG_MAC80211("leave\n");
5724
5725 }
5726
5727 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
5728 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
5729                                      struct ieee80211_vif *vif,
5730                                      struct ieee80211_bss_conf *bss_conf,
5731                                      u32 changes)
5732 {
5733         struct iwl_priv *priv = hw->priv;
5734
5735         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
5736
5737         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5738                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
5739                                    bss_conf->use_short_preamble);
5740                 if (bss_conf->use_short_preamble)
5741                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5742                 else
5743                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5744         }
5745
5746         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5747                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5748                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
5749                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
5750                 else
5751                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5752         }
5753
5754         if (changes & BSS_CHANGED_HT) {
5755                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
5756                 iwl4965_ht_conf(priv, bss_conf);
5757                 iwl_set_rxon_chain(priv);
5758         }
5759
5760         if (changes & BSS_CHANGED_ASSOC) {
5761                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
5762                 /* This should never happen as this function should
5763                  * never be called from interrupt context. */
5764                 if (WARN_ON_ONCE(in_interrupt()))
5765                         return;
5766                 if (bss_conf->assoc) {
5767                         priv->assoc_id = bss_conf->aid;
5768                         priv->beacon_int = bss_conf->beacon_int;
5769                         priv->timestamp = bss_conf->timestamp;
5770                         priv->assoc_capability = bss_conf->assoc_capability;
5771                         priv->next_scan_jiffies = jiffies +
5772                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
5773                         mutex_lock(&priv->mutex);
5774                         iwl4965_post_associate(priv);
5775                         mutex_unlock(&priv->mutex);
5776                 } else {
5777                         priv->assoc_id = 0;
5778                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
5779                 }
5780         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
5781                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
5782                         iwl_send_rxon_assoc(priv);
5783         }
5784
5785 }
5786
5787 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
5788 {
5789         int rc = 0;
5790         unsigned long flags;
5791         struct iwl_priv *priv = hw->priv;
5792
5793         IWL_DEBUG_MAC80211("enter\n");
5794
5795         mutex_lock(&priv->mutex);
5796         spin_lock_irqsave(&priv->lock, flags);
5797
5798         if (!iwl_is_ready_rf(priv)) {
5799                 rc = -EIO;
5800                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
5801                 goto out_unlock;
5802         }
5803
5804         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
5805                 rc = -EIO;
5806                 IWL_ERROR("ERROR: APs don't scan\n");
5807                 goto out_unlock;
5808         }
5809
5810         /* we don't schedule scan within next_scan_jiffies period */
5811         if (priv->next_scan_jiffies &&
5812                         time_after(priv->next_scan_jiffies, jiffies)) {
5813                 rc = -EAGAIN;
5814                 goto out_unlock;
5815         }
5816         /* if we just finished scan ask for delay */
5817         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
5818                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
5819                 rc = -EAGAIN;
5820                 goto out_unlock;
5821         }
5822         if (len) {
5823                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
5824                                iwl4965_escape_essid(ssid, len), (int)len);
5825
5826                 priv->one_direct_scan = 1;
5827                 priv->direct_ssid_len = (u8)
5828                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
5829                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
5830         } else
5831                 priv->one_direct_scan = 0;
5832
5833         rc = iwl4965_scan_initiate(priv);
5834
5835         IWL_DEBUG_MAC80211("leave\n");
5836
5837 out_unlock:
5838         spin_unlock_irqrestore(&priv->lock, flags);
5839         mutex_unlock(&priv->mutex);
5840
5841         return rc;
5842 }
5843
5844 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
5845                         struct ieee80211_key_conf *keyconf, const u8 *addr,
5846                         u32 iv32, u16 *phase1key)
5847 {
5848         struct iwl_priv *priv = hw->priv;
5849         u8 sta_id = IWL_INVALID_STATION;
5850         unsigned long flags;
5851         __le16 key_flags = 0;
5852         int i;
5853         DECLARE_MAC_BUF(mac);
5854
5855         IWL_DEBUG_MAC80211("enter\n");
5856
5857         sta_id = iwl_find_station(priv, addr);
5858         if (sta_id == IWL_INVALID_STATION) {
5859                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5860                                    print_mac(mac, addr));
5861                 return;
5862         }
5863
5864         iwl4965_scan_cancel_timeout(priv, 100);
5865
5866         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
5867         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
5868         key_flags &= ~STA_KEY_FLG_INVALID;
5869
5870         if (sta_id == priv->hw_params.bcast_sta_id)
5871                 key_flags |= STA_KEY_MULTICAST_MSK;
5872
5873         spin_lock_irqsave(&priv->sta_lock, flags);
5874
5875         priv->stations[sta_id].sta.key.key_flags = key_flags;
5876         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
5877
5878         for (i = 0; i < 5; i++)
5879                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
5880                         cpu_to_le16(phase1key[i]);
5881
5882         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
5883         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
5884
5885         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
5886
5887         spin_unlock_irqrestore(&priv->sta_lock, flags);
5888
5889         IWL_DEBUG_MAC80211("leave\n");
5890 }
5891
5892 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5893                            const u8 *local_addr, const u8 *addr,
5894                            struct ieee80211_key_conf *key)
5895 {
5896         struct iwl_priv *priv = hw->priv;
5897         DECLARE_MAC_BUF(mac);
5898         int ret = 0;
5899         u8 sta_id = IWL_INVALID_STATION;
5900         u8 is_default_wep_key = 0;
5901
5902         IWL_DEBUG_MAC80211("enter\n");
5903
5904         if (priv->hw_params.sw_crypto) {
5905                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
5906                 return -EOPNOTSUPP;
5907         }
5908
5909         if (is_zero_ether_addr(addr))
5910                 /* only support pairwise keys */
5911                 return -EOPNOTSUPP;
5912
5913         sta_id = iwl_find_station(priv, addr);
5914         if (sta_id == IWL_INVALID_STATION) {
5915                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5916                                    print_mac(mac, addr));
5917                 return -EINVAL;
5918
5919         }
5920
5921         mutex_lock(&priv->mutex);
5922         iwl4965_scan_cancel_timeout(priv, 100);
5923         mutex_unlock(&priv->mutex);
5924
5925         /* If we are getting WEP group key and we didn't receive any key mapping
5926          * so far, we are in legacy wep mode (group key only), otherwise we are
5927          * in 1X mode.
5928          * In legacy wep mode, we use another host command to the uCode */
5929         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
5930                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
5931                 if (cmd == SET_KEY)
5932                         is_default_wep_key = !priv->key_mapping_key;
5933                 else
5934                         is_default_wep_key = priv->default_wep_key;
5935         }
5936
5937         switch (cmd) {
5938         case SET_KEY:
5939                 if (is_default_wep_key)
5940                         ret = iwl_set_default_wep_key(priv, key);
5941                 else
5942                         ret = iwl_set_dynamic_key(priv, key, sta_id);
5943
5944                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
5945                 break;
5946         case DISABLE_KEY:
5947                 if (is_default_wep_key)
5948                         ret = iwl_remove_default_wep_key(priv, key);
5949                 else
5950                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
5951
5952                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
5953                 break;
5954         default:
5955                 ret = -EINVAL;
5956         }
5957
5958         IWL_DEBUG_MAC80211("leave\n");
5959
5960         return ret;
5961 }
5962
5963 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
5964                            const struct ieee80211_tx_queue_params *params)
5965 {
5966         struct iwl_priv *priv = hw->priv;
5967         unsigned long flags;
5968         int q;
5969
5970         IWL_DEBUG_MAC80211("enter\n");
5971
5972         if (!iwl_is_ready_rf(priv)) {
5973                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
5974                 return -EIO;
5975         }
5976
5977         if (queue >= AC_NUM) {
5978                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
5979                 return 0;
5980         }
5981
5982         if (!priv->qos_data.qos_enable) {
5983                 priv->qos_data.qos_active = 0;
5984                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
5985                 return 0;
5986         }
5987         q = AC_NUM - 1 - queue;
5988
5989         spin_lock_irqsave(&priv->lock, flags);
5990
5991         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
5992         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
5993         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
5994         priv->qos_data.def_qos_parm.ac[q].edca_txop =
5995                         cpu_to_le16((params->txop * 32));
5996
5997         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
5998         priv->qos_data.qos_active = 1;
5999
6000         spin_unlock_irqrestore(&priv->lock, flags);
6001
6002         mutex_lock(&priv->mutex);
6003         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6004                 iwl4965_activate_qos(priv, 1);
6005         else if (priv->assoc_id && iwl_is_associated(priv))
6006                 iwl4965_activate_qos(priv, 0);
6007
6008         mutex_unlock(&priv->mutex);
6009
6010         IWL_DEBUG_MAC80211("leave\n");
6011         return 0;
6012 }
6013
6014 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6015                                 struct ieee80211_tx_queue_stats *stats)
6016 {
6017         struct iwl_priv *priv = hw->priv;
6018         int i, avail;
6019         struct iwl4965_tx_queue *txq;
6020         struct iwl4965_queue *q;
6021         unsigned long flags;
6022
6023         IWL_DEBUG_MAC80211("enter\n");
6024
6025         if (!iwl_is_ready_rf(priv)) {
6026                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6027                 return -EIO;
6028         }
6029
6030         spin_lock_irqsave(&priv->lock, flags);
6031
6032         for (i = 0; i < AC_NUM; i++) {
6033                 txq = &priv->txq[i];
6034                 q = &txq->q;
6035                 avail = iwl4965_queue_space(q);
6036
6037                 stats[i].len = q->n_window - avail;
6038                 stats[i].limit = q->n_window - q->high_mark;
6039                 stats[i].count = q->n_window;
6040
6041         }
6042         spin_unlock_irqrestore(&priv->lock, flags);
6043
6044         IWL_DEBUG_MAC80211("leave\n");
6045
6046         return 0;
6047 }
6048
6049 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6050                              struct ieee80211_low_level_stats *stats)
6051 {
6052         struct iwl_priv *priv = hw->priv;
6053
6054         priv = hw->priv;
6055         IWL_DEBUG_MAC80211("enter\n");
6056         IWL_DEBUG_MAC80211("leave\n");
6057
6058         return 0;
6059 }
6060
6061 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)