iwlwifi: move NIC init and Tx queues init to iwlcore
[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 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
211
212 /*************** STATION TABLE MANAGEMENT ****
213  * mac80211 should be examined to determine if sta_info is duplicating
214  * the functionality provided here
215  */
216
217 /**************************************************************/
218
219 #if 0 /* temporary disable till we add real remove station */
220 /**
221  * iwl4965_remove_station - Remove driver's knowledge of station.
222  *
223  * NOTE:  This does not remove station from device's station table.
224  */
225 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
226 {
227         int index = IWL_INVALID_STATION;
228         int i;
229         unsigned long flags;
230
231         spin_lock_irqsave(&priv->sta_lock, flags);
232
233         if (is_ap)
234                 index = IWL_AP_ID;
235         else if (is_broadcast_ether_addr(addr))
236                 index = priv->hw_params.bcast_sta_id;
237         else
238                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
239                         if (priv->stations[i].used &&
240                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
241                                                 addr)) {
242                                 index = i;
243                                 break;
244                         }
245
246         if (unlikely(index == IWL_INVALID_STATION))
247                 goto out;
248
249         if (priv->stations[index].used) {
250                 priv->stations[index].used = 0;
251                 priv->num_stations--;
252         }
253
254         BUG_ON(priv->num_stations < 0);
255
256 out:
257         spin_unlock_irqrestore(&priv->sta_lock, flags);
258         return 0;
259 }
260 #endif
261
262 /**
263  * iwl4965_add_station_flags - Add station to tables in driver and device
264  */
265 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
266                                 int is_ap, u8 flags, void *ht_data)
267 {
268         int i;
269         int index = IWL_INVALID_STATION;
270         struct iwl_station_entry *station;
271         unsigned long flags_spin;
272         DECLARE_MAC_BUF(mac);
273
274         spin_lock_irqsave(&priv->sta_lock, flags_spin);
275         if (is_ap)
276                 index = IWL_AP_ID;
277         else if (is_broadcast_ether_addr(addr))
278                 index = priv->hw_params.bcast_sta_id;
279         else
280                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
281                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
282                                                 addr)) {
283                                 index = i;
284                                 break;
285                         }
286
287                         if (!priv->stations[i].used &&
288                             index == IWL_INVALID_STATION)
289                                 index = i;
290                 }
291
292
293         /* These two conditions have the same outcome, but keep them separate
294           since they have different meanings */
295         if (unlikely(index == IWL_INVALID_STATION)) {
296                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
297                 return index;
298         }
299
300         if (priv->stations[index].used &&
301             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
302                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
303                 return index;
304         }
305
306
307         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
308         station = &priv->stations[index];
309         station->used = 1;
310         priv->num_stations++;
311
312         /* Set up the REPLY_ADD_STA command to send to device */
313         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
314         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
315         station->sta.mode = 0;
316         station->sta.sta.sta_id = index;
317         station->sta.station_flags = 0;
318
319 #ifdef CONFIG_IWL4965_HT
320         /* BCAST station and IBSS stations do not work in HT mode */
321         if (index != priv->hw_params.bcast_sta_id &&
322             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
323                 iwl4965_set_ht_add_station(priv, index,
324                                  (struct ieee80211_ht_info *) ht_data);
325 #endif /*CONFIG_IWL4965_HT*/
326
327         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
328
329         /* Add station to device's station table */
330         iwl_send_add_sta(priv, &station->sta, flags);
331         return index;
332
333 }
334
335
336
337 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
338
339 /**
340  * iwl4965_enqueue_hcmd - enqueue a uCode command
341  * @priv: device private data point
342  * @cmd: a point to the ucode command structure
343  *
344  * The function returns < 0 values to indicate the operation is
345  * failed. On success, it turns the index (> 0) of command in the
346  * command queue.
347  */
348 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
349 {
350         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
351         struct iwl4965_queue *q = &txq->q;
352         struct iwl_tfd_frame *tfd;
353         u32 *control_flags;
354         struct iwl_cmd *out_cmd;
355         u32 idx;
356         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
357         dma_addr_t phys_addr;
358         int ret;
359         unsigned long flags;
360
361         /* If any of the command structures end up being larger than
362          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
363          * we will need to increase the size of the TFD entries */
364         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
365                !(cmd->meta.flags & CMD_SIZE_HUGE));
366
367         if (iwl_is_rfkill(priv)) {
368                 IWL_DEBUG_INFO("Not sending command - RF KILL");
369                 return -EIO;
370         }
371
372         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
373                 IWL_ERROR("No space for Tx\n");
374                 return -ENOSPC;
375         }
376
377         spin_lock_irqsave(&priv->hcmd_lock, flags);
378
379         tfd = &txq->bd[q->write_ptr];
380         memset(tfd, 0, sizeof(*tfd));
381
382         control_flags = (u32 *) tfd;
383
384         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
385         out_cmd = &txq->cmd[idx];
386
387         out_cmd->hdr.cmd = cmd->id;
388         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
389         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
390
391         /* At this point, the out_cmd now has all of the incoming cmd
392          * information */
393
394         out_cmd->hdr.flags = 0;
395         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
396                         INDEX_TO_SEQ(q->write_ptr));
397         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
398                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
399
400         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
401                         offsetof(struct iwl_cmd, hdr);
402         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
403
404         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
405                      "%d bytes at %d[%d]:%d\n",
406                      get_cmd_string(out_cmd->hdr.cmd),
407                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
408                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
409
410         txq->need_update = 1;
411
412         /* Set up entry in queue's byte count circular buffer */
413         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
414
415         /* Increment and update queue's write index */
416         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
417         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
418
419         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
420         return ret ? ret : idx;
421 }
422
423 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
424 {
425         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
426
427         if (hw_decrypt)
428                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
429         else
430                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
431
432 }
433
434 /**
435  * iwl4965_rxon_add_station - add station into station table.
436  *
437  * there is only one AP station with id= IWL_AP_ID
438  * NOTE: mutex must be held before calling this fnction
439  */
440 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
441                                 const u8 *addr, int is_ap)
442 {
443         u8 sta_id;
444
445         /* Add station to device's station table */
446 #ifdef CONFIG_IWL4965_HT
447         struct ieee80211_conf *conf = &priv->hw->conf;
448         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
449
450         if ((is_ap) &&
451             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
452             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
453                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
454                                                    0, cur_ht_config);
455         else
456 #endif /* CONFIG_IWL4965_HT */
457                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
458                                                    0, NULL);
459
460         /* Set up default rate scaling table in device's station table */
461         iwl4965_add_station(priv, addr, is_ap);
462
463         return sta_id;
464 }
465
466 /**
467  * iwl4965_check_rxon_cmd - validate RXON structure is valid
468  *
469  * NOTE:  This is really only useful during development and can eventually
470  * be #ifdef'd out once the driver is stable and folks aren't actively
471  * making changes
472  */
473 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
474 {
475         int error = 0;
476         int counter = 1;
477
478         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
479                 error |= le32_to_cpu(rxon->flags &
480                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
481                                  RXON_FLG_RADAR_DETECT_MSK));
482                 if (error)
483                         IWL_WARNING("check 24G fields %d | %d\n",
484                                     counter++, error);
485         } else {
486                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
487                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
488                 if (error)
489                         IWL_WARNING("check 52 fields %d | %d\n",
490                                     counter++, error);
491                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
492                 if (error)
493                         IWL_WARNING("check 52 CCK %d | %d\n",
494                                     counter++, error);
495         }
496         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
497         if (error)
498                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
499
500         /* make sure basic rates 6Mbps and 1Mbps are supported */
501         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
502                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
503         if (error)
504                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
505
506         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
507         if (error)
508                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
509
510         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
511                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
512         if (error)
513                 IWL_WARNING("check CCK and short slot %d | %d\n",
514                             counter++, error);
515
516         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
517                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
518         if (error)
519                 IWL_WARNING("check CCK & auto detect %d | %d\n",
520                             counter++, error);
521
522         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
523                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
524         if (error)
525                 IWL_WARNING("check TGG and auto detect %d | %d\n",
526                             counter++, error);
527
528         if (error)
529                 IWL_WARNING("Tuning to channel %d\n",
530                             le16_to_cpu(rxon->channel));
531
532         if (error) {
533                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
534                 return -1;
535         }
536         return 0;
537 }
538
539 /**
540  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
541  * @priv: staging_rxon is compared to active_rxon
542  *
543  * If the RXON structure is changing enough to require a new tune,
544  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
545  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
546  */
547 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
548 {
549
550         /* These items are only settable from the full RXON command */
551         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
552             compare_ether_addr(priv->staging_rxon.bssid_addr,
553                                priv->active_rxon.bssid_addr) ||
554             compare_ether_addr(priv->staging_rxon.node_addr,
555                                priv->active_rxon.node_addr) ||
556             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
557                                priv->active_rxon.wlap_bssid_addr) ||
558             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
559             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
560             (priv->staging_rxon.air_propagation !=
561              priv->active_rxon.air_propagation) ||
562             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
563              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
564             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
565              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
566             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
567             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
568                 return 1;
569
570         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
571          * be updated with the RXON_ASSOC command -- however only some
572          * flag transitions are allowed using RXON_ASSOC */
573
574         /* Check if we are not switching bands */
575         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
576             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
577                 return 1;
578
579         /* Check if we are switching association toggle */
580         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
581                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
582                 return 1;
583
584         return 0;
585 }
586
587 /**
588  * iwl4965_commit_rxon - commit staging_rxon to hardware
589  *
590  * The RXON command in staging_rxon is committed to the hardware and
591  * the active_rxon structure is updated with the new data.  This
592  * function correctly transitions out of the RXON_ASSOC_MSK state if
593  * a HW tune is required based on the RXON structure changes.
594  */
595 static int iwl4965_commit_rxon(struct iwl_priv *priv)
596 {
597         /* cast away the const for active_rxon in this function */
598         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
599         DECLARE_MAC_BUF(mac);
600         int rc = 0;
601
602         if (!iwl_is_alive(priv))
603                 return -1;
604
605         /* always get timestamp with Rx frame */
606         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
607
608         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
609         if (rc) {
610                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
611                 return -EINVAL;
612         }
613
614         /* If we don't need to send a full RXON, we can use
615          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
616          * and other flags for the current radio configuration. */
617         if (!iwl4965_full_rxon_required(priv)) {
618                 rc = iwl_send_rxon_assoc(priv);
619                 if (rc) {
620                         IWL_ERROR("Error setting RXON_ASSOC "
621                                   "configuration (%d).\n", rc);
622                         return rc;
623                 }
624
625                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
626
627                 return 0;
628         }
629
630         /* station table will be cleared */
631         priv->assoc_station_added = 0;
632
633         /* If we are currently associated and the new config requires
634          * an RXON_ASSOC and the new config wants the associated mask enabled,
635          * we must clear the associated from the active configuration
636          * before we apply the new config */
637         if (iwl_is_associated(priv) &&
638             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
639                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
640                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
641
642                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
643                                       sizeof(struct iwl4965_rxon_cmd),
644                                       &priv->active_rxon);
645
646                 /* If the mask clearing failed then we set
647                  * active_rxon back to what it was previously */
648                 if (rc) {
649                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
650                         IWL_ERROR("Error clearing ASSOC_MSK on current "
651                                   "configuration (%d).\n", rc);
652                         return rc;
653                 }
654         }
655
656         IWL_DEBUG_INFO("Sending RXON\n"
657                        "* with%s RXON_FILTER_ASSOC_MSK\n"
658                        "* channel = %d\n"
659                        "* bssid = %s\n",
660                        ((priv->staging_rxon.filter_flags &
661                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
662                        le16_to_cpu(priv->staging_rxon.channel),
663                        print_mac(mac, priv->staging_rxon.bssid_addr));
664
665         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
666         /* Apply the new configuration */
667         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
668                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
669         if (rc) {
670                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
671                 return rc;
672         }
673
674         iwlcore_clear_stations_table(priv);
675
676         if (!priv->error_recovering)
677                 priv->start_calib = 0;
678
679         iwl_init_sensitivity(priv);
680
681         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
682
683         /* If we issue a new RXON command which required a tune then we must
684          * send a new TXPOWER command or we won't be able to Tx any frames */
685         rc = iwl4965_hw_reg_send_txpower(priv);
686         if (rc) {
687                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
688                 return rc;
689         }
690
691         /* Add the broadcast address so we can send broadcast frames */
692         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
693             IWL_INVALID_STATION) {
694                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
695                 return -EIO;
696         }
697
698         /* If we have set the ASSOC_MSK and we are in BSS mode then
699          * add the IWL_AP_ID to the station rate table */
700         if (iwl_is_associated(priv) &&
701             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
702                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
703                     == IWL_INVALID_STATION) {
704                         IWL_ERROR("Error adding AP address for transmit.\n");
705                         return -EIO;
706                 }
707                 priv->assoc_station_added = 1;
708                 if (priv->default_wep_key &&
709                     iwl_send_static_wepkey_cmd(priv, 0))
710                         IWL_ERROR("Could not send WEP static key.\n");
711         }
712
713         return 0;
714 }
715
716 void iwl4965_update_chain_flags(struct iwl_priv *priv)
717 {
718
719         iwl_set_rxon_chain(priv);
720         iwl4965_commit_rxon(priv);
721 }
722
723 static int iwl4965_send_bt_config(struct iwl_priv *priv)
724 {
725         struct iwl4965_bt_cmd bt_cmd = {
726                 .flags = 3,
727                 .lead_time = 0xAA,
728                 .max_kill = 1,
729                 .kill_ack_mask = 0,
730                 .kill_cts_mask = 0,
731         };
732
733         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
734                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
735 }
736
737 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
738 {
739         int ret = 0;
740         struct iwl_rx_packet *res;
741         struct iwl_host_cmd cmd = {
742                 .id = REPLY_SCAN_ABORT_CMD,
743                 .meta.flags = CMD_WANT_SKB,
744         };
745
746         /* If there isn't a scan actively going on in the hardware
747          * then we are in between scan bands and not actually
748          * actively scanning, so don't send the abort command */
749         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
750                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
751                 return 0;
752         }
753
754         ret = iwl_send_cmd_sync(priv, &cmd);
755         if (ret) {
756                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
757                 return ret;
758         }
759
760         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
761         if (res->u.status != CAN_ABORT_STATUS) {
762                 /* The scan abort will return 1 for success or
763                  * 2 for "failure".  A failure condition can be
764                  * due to simply not being in an active scan which
765                  * can occur if we send the scan abort before we
766                  * the microcode has notified us that a scan is
767                  * completed. */
768                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
769                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
770                 clear_bit(STATUS_SCAN_HW, &priv->status);
771         }
772
773         dev_kfree_skb_any(cmd.meta.u.skb);
774
775         return ret;
776 }
777
778 /*
779  * CARD_STATE_CMD
780  *
781  * Use: Sets the device's internal card state to enable, disable, or halt
782  *
783  * When in the 'enable' state the card operates as normal.
784  * When in the 'disable' state, the card enters into a low power mode.
785  * When in the 'halt' state, the card is shut down and must be fully
786  * restarted to come back on.
787  */
788 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
789 {
790         struct iwl_host_cmd cmd = {
791                 .id = REPLY_CARD_STATE_CMD,
792                 .len = sizeof(u32),
793                 .data = &flags,
794                 .meta.flags = meta_flag,
795         };
796
797         return iwl_send_cmd(priv, &cmd);
798 }
799
800 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
801 {
802         struct list_head *element;
803
804         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
805                        priv->frames_count);
806
807         while (!list_empty(&priv->free_frames)) {
808                 element = priv->free_frames.next;
809                 list_del(element);
810                 kfree(list_entry(element, struct iwl4965_frame, list));
811                 priv->frames_count--;
812         }
813
814         if (priv->frames_count) {
815                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
816                             priv->frames_count);
817                 priv->frames_count = 0;
818         }
819 }
820
821 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
822 {
823         struct iwl4965_frame *frame;
824         struct list_head *element;
825         if (list_empty(&priv->free_frames)) {
826                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
827                 if (!frame) {
828                         IWL_ERROR("Could not allocate frame!\n");
829                         return NULL;
830                 }
831
832                 priv->frames_count++;
833                 return frame;
834         }
835
836         element = priv->free_frames.next;
837         list_del(element);
838         return list_entry(element, struct iwl4965_frame, list);
839 }
840
841 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
842 {
843         memset(frame, 0, sizeof(*frame));
844         list_add(&frame->list, &priv->free_frames);
845 }
846
847 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
848                                 struct ieee80211_hdr *hdr,
849                                 const u8 *dest, int left)
850 {
851
852         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
853             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
854              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
855                 return 0;
856
857         if (priv->ibss_beacon->len > left)
858                 return 0;
859
860         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
861
862         return priv->ibss_beacon->len;
863 }
864
865 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
866 {
867         int i;
868         int rate_mask;
869
870         /* Set rate mask*/
871         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
872                 rate_mask = priv->active_rate_basic & 0xF;
873         else
874                 rate_mask = priv->active_rate_basic & 0xFF0;
875
876         /* Find lowest valid rate */
877         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
878                                         i = iwl4965_rates[i].next_ieee) {
879                 if (rate_mask & (1 << i))
880                         return iwl4965_rates[i].plcp;
881         }
882
883         /* No valid rate was found. Assign the lowest one */
884         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
885                 return IWL_RATE_1M_PLCP;
886         else
887                 return IWL_RATE_6M_PLCP;
888 }
889
890 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
891 {
892         struct iwl4965_frame *frame;
893         unsigned int frame_size;
894         int rc;
895         u8 rate;
896
897         frame = iwl4965_get_free_frame(priv);
898
899         if (!frame) {
900                 IWL_ERROR("Could not obtain free frame buffer for beacon "
901                           "command.\n");
902                 return -ENOMEM;
903         }
904
905         rate = iwl4965_rate_get_lowest_plcp(priv);
906
907         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
908
909         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
910                               &frame->u.cmd[0]);
911
912         iwl4965_free_frame(priv, frame);
913
914         return rc;
915 }
916
917 /******************************************************************************
918  *
919  * Misc. internal state and helper functions
920  *
921  ******************************************************************************/
922
923 /**
924  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
925  *
926  * return : set the bit for each supported rate insert in ie
927  */
928 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
929                                     u16 basic_rate, int *left)
930 {
931         u16 ret_rates = 0, bit;
932         int i;
933         u8 *cnt = ie;
934         u8 *rates = ie + 1;
935
936         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
937                 if (bit & supported_rate) {
938                         ret_rates |= bit;
939                         rates[*cnt] = iwl4965_rates[i].ieee |
940                                 ((bit & basic_rate) ? 0x80 : 0x00);
941                         (*cnt)++;
942                         (*left)--;
943                         if ((*left <= 0) ||
944                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
945                                 break;
946                 }
947         }
948
949         return ret_rates;
950 }
951
952 #ifdef CONFIG_IWL4965_HT
953 static void iwl4965_ht_conf(struct iwl_priv *priv,
954                             struct ieee80211_bss_conf *bss_conf)
955 {
956         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
957         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
958         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
959
960         IWL_DEBUG_MAC80211("enter: \n");
961
962         iwl_conf->is_ht = bss_conf->assoc_ht;
963
964         if (!iwl_conf->is_ht)
965                 return;
966
967         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
968
969         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
970                 iwl_conf->sgf |= 0x1;
971         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
972                 iwl_conf->sgf |= 0x2;
973
974         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
975         iwl_conf->max_amsdu_size =
976                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
977
978         iwl_conf->supported_chan_width =
979                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
980         iwl_conf->extension_chan_offset =
981                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
982         /* If no above or below channel supplied disable FAT channel */
983         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
984             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
985                 iwl_conf->supported_chan_width = 0;
986
987         iwl_conf->tx_mimo_ps_mode =
988                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
989         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
990
991         iwl_conf->control_channel = ht_bss_conf->primary_channel;
992         iwl_conf->tx_chan_width =
993                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
994         iwl_conf->ht_protection =
995                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
996         iwl_conf->non_GF_STA_present =
997                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
998
999         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1000         IWL_DEBUG_MAC80211("leave\n");
1001 }
1002
1003 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1004                         u8 *pos, int *left)
1005 {
1006         struct ieee80211_ht_cap *ht_cap;
1007
1008         if (!sband || !sband->ht_info.ht_supported)
1009                 return;
1010
1011         if (*left < sizeof(struct ieee80211_ht_cap))
1012                 return;
1013
1014         *pos++ = sizeof(struct ieee80211_ht_cap);
1015         ht_cap = (struct ieee80211_ht_cap *) pos;
1016
1017         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1018         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1019         ht_cap->ampdu_params_info =
1020                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1021                 ((sband->ht_info.ampdu_density << 2) &
1022                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1023         *left -= sizeof(struct ieee80211_ht_cap);
1024 }
1025 #else
1026 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1027                                    struct ieee80211_bss_conf *bss_conf)
1028 {
1029 }
1030 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1031                         u8 *pos, int *left)
1032 {
1033 }
1034 #endif
1035
1036
1037 /**
1038  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1039  */
1040 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1041                                   enum ieee80211_band band,
1042                                   struct ieee80211_mgmt *frame,
1043                                   int left, int is_direct)
1044 {
1045         int len = 0;
1046         u8 *pos = NULL;
1047         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1048         const struct ieee80211_supported_band *sband =
1049                                                 iwl_get_hw_mode(priv, band);
1050
1051         /* Make sure there is enough space for the probe request,
1052          * two mandatory IEs and the data */
1053         left -= 24;
1054         if (left < 0)
1055                 return 0;
1056         len += 24;
1057
1058         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1059         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1060         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1061         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1062         frame->seq_ctrl = 0;
1063
1064         /* fill in our indirect SSID IE */
1065         /* ...next IE... */
1066
1067         left -= 2;
1068         if (left < 0)
1069                 return 0;
1070         len += 2;
1071         pos = &(frame->u.probe_req.variable[0]);
1072         *pos++ = WLAN_EID_SSID;
1073         *pos++ = 0;
1074
1075         /* fill in our direct SSID IE... */
1076         if (is_direct) {
1077                 /* ...next IE... */
1078                 left -= 2 + priv->essid_len;
1079                 if (left < 0)
1080                         return 0;
1081                 /* ... fill it in... */
1082                 *pos++ = WLAN_EID_SSID;
1083                 *pos++ = priv->essid_len;
1084                 memcpy(pos, priv->essid, priv->essid_len);
1085                 pos += priv->essid_len;
1086                 len += 2 + priv->essid_len;
1087         }
1088
1089         /* fill in supported rate */
1090         /* ...next IE... */
1091         left -= 2;
1092         if (left < 0)
1093                 return 0;
1094
1095         /* ... fill it in... */
1096         *pos++ = WLAN_EID_SUPP_RATES;
1097         *pos = 0;
1098
1099         /* exclude 60M rate */
1100         active_rates = priv->rates_mask;
1101         active_rates &= ~IWL_RATE_60M_MASK;
1102
1103         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1104
1105         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1106         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1107                         active_rate_basic, &left);
1108         active_rates &= ~ret_rates;
1109
1110         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1111                                  active_rate_basic, &left);
1112         active_rates &= ~ret_rates;
1113
1114         len += 2 + *pos;
1115         pos += (*pos) + 1;
1116         if (active_rates == 0)
1117                 goto fill_end;
1118
1119         /* fill in supported extended rate */
1120         /* ...next IE... */
1121         left -= 2;
1122         if (left < 0)
1123                 return 0;
1124         /* ... fill it in... */
1125         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1126         *pos = 0;
1127         iwl4965_supported_rate_to_ie(pos, active_rates,
1128                                  active_rate_basic, &left);
1129         if (*pos > 0)
1130                 len += 2 + *pos;
1131
1132  fill_end:
1133         /* fill in HT IE */
1134         left -= 2;
1135         if (left < 0)
1136                 return 0;
1137
1138         *pos++ = WLAN_EID_HT_CAPABILITY;
1139         *pos = 0;
1140
1141         iwl_ht_cap_to_ie(sband, pos, &left);
1142
1143         if (*pos > 0)
1144                 len += 2 + *pos;
1145         return (u16)len;
1146 }
1147
1148 /*
1149  * QoS  support
1150 */
1151 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1152                                        struct iwl4965_qosparam_cmd *qos)
1153 {
1154
1155         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1156                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1157 }
1158
1159 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1160 {
1161         unsigned long flags;
1162
1163         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1164                 return;
1165
1166         if (!priv->qos_data.qos_enable)
1167                 return;
1168
1169         spin_lock_irqsave(&priv->lock, flags);
1170         priv->qos_data.def_qos_parm.qos_flags = 0;
1171
1172         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1173             !priv->qos_data.qos_cap.q_AP.txop_request)
1174                 priv->qos_data.def_qos_parm.qos_flags |=
1175                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1176         if (priv->qos_data.qos_active)
1177                 priv->qos_data.def_qos_parm.qos_flags |=
1178                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1179
1180 #ifdef CONFIG_IWL4965_HT
1181         if (priv->current_ht_config.is_ht)
1182                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1183 #endif /* CONFIG_IWL4965_HT */
1184
1185         spin_unlock_irqrestore(&priv->lock, flags);
1186
1187         if (force || iwl_is_associated(priv)) {
1188                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1189                                 priv->qos_data.qos_active,
1190                                 priv->qos_data.def_qos_parm.qos_flags);
1191
1192                 iwl4965_send_qos_params_command(priv,
1193                                 &(priv->qos_data.def_qos_parm));
1194         }
1195 }
1196
1197 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1198 {
1199         /* Filter incoming packets to determine if they are targeted toward
1200          * this network, discarding packets coming from ourselves */
1201         switch (priv->iw_mode) {
1202         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1203                 /* packets from our adapter are dropped (echo) */
1204                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1205                         return 0;
1206                 /* {broad,multi}cast packets to our IBSS go through */
1207                 if (is_multicast_ether_addr(header->addr1))
1208                         return !compare_ether_addr(header->addr3, priv->bssid);
1209                 /* packets to our adapter go through */
1210                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1211         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1212                 /* packets from our adapter are dropped (echo) */
1213                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1214                         return 0;
1215                 /* {broad,multi}cast packets to our BSS go through */
1216                 if (is_multicast_ether_addr(header->addr1))
1217                         return !compare_ether_addr(header->addr2, priv->bssid);
1218                 /* packets to our adapter go through */
1219                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1220         default:
1221                 break;
1222         }
1223
1224         return 1;
1225 }
1226
1227 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1228
1229 static const char *iwl4965_get_tx_fail_reason(u32 status)
1230 {
1231         switch (status & TX_STATUS_MSK) {
1232         case TX_STATUS_SUCCESS:
1233                 return "SUCCESS";
1234                 TX_STATUS_ENTRY(SHORT_LIMIT);
1235                 TX_STATUS_ENTRY(LONG_LIMIT);
1236                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1237                 TX_STATUS_ENTRY(MGMNT_ABORT);
1238                 TX_STATUS_ENTRY(NEXT_FRAG);
1239                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1240                 TX_STATUS_ENTRY(DEST_PS);
1241                 TX_STATUS_ENTRY(ABORTED);
1242                 TX_STATUS_ENTRY(BT_RETRY);
1243                 TX_STATUS_ENTRY(STA_INVALID);
1244                 TX_STATUS_ENTRY(FRAG_DROPPED);
1245                 TX_STATUS_ENTRY(TID_DISABLE);
1246                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1247                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1248                 TX_STATUS_ENTRY(TX_LOCKED);
1249                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1250         }
1251
1252         return "UNKNOWN";
1253 }
1254
1255 /**
1256  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1257  *
1258  * NOTE: priv->mutex is not required before calling this function
1259  */
1260 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1261 {
1262         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1263                 clear_bit(STATUS_SCANNING, &priv->status);
1264                 return 0;
1265         }
1266
1267         if (test_bit(STATUS_SCANNING, &priv->status)) {
1268                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1269                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1270                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1271                         queue_work(priv->workqueue, &priv->abort_scan);
1272
1273                 } else
1274                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1275
1276                 return test_bit(STATUS_SCANNING, &priv->status);
1277         }
1278
1279         return 0;
1280 }
1281
1282 /**
1283  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1284  * @ms: amount of time to wait (in milliseconds) for scan to abort
1285  *
1286  * NOTE: priv->mutex must be held before calling this function
1287  */
1288 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1289 {
1290         unsigned long now = jiffies;
1291         int ret;
1292
1293         ret = iwl4965_scan_cancel(priv);
1294         if (ret && ms) {
1295                 mutex_unlock(&priv->mutex);
1296                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1297                                 test_bit(STATUS_SCANNING, &priv->status))
1298                         msleep(1);
1299                 mutex_lock(&priv->mutex);
1300
1301                 return test_bit(STATUS_SCANNING, &priv->status);
1302         }
1303
1304         return ret;
1305 }
1306
1307 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1308 {
1309         /* Reset ieee stats */
1310
1311         /* We don't reset the net_device_stats (ieee->stats) on
1312          * re-association */
1313
1314         priv->last_seq_num = -1;
1315         priv->last_frag_num = -1;
1316         priv->last_packet_time = 0;
1317
1318         iwl4965_scan_cancel(priv);
1319 }
1320
1321 #define MAX_UCODE_BEACON_INTERVAL       4096
1322 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1323
1324 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1325 {
1326         u16 new_val = 0;
1327         u16 beacon_factor = 0;
1328
1329         beacon_factor =
1330             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1331                 / MAX_UCODE_BEACON_INTERVAL;
1332         new_val = beacon_val / beacon_factor;
1333
1334         return cpu_to_le16(new_val);
1335 }
1336
1337 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1338 {
1339         u64 interval_tm_unit;
1340         u64 tsf, result;
1341         unsigned long flags;
1342         struct ieee80211_conf *conf = NULL;
1343         u16 beacon_int = 0;
1344
1345         conf = ieee80211_get_hw_conf(priv->hw);
1346
1347         spin_lock_irqsave(&priv->lock, flags);
1348         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1349         priv->rxon_timing.timestamp.dw[0] =
1350                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1351
1352         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1353
1354         tsf = priv->timestamp;
1355
1356         beacon_int = priv->beacon_int;
1357         spin_unlock_irqrestore(&priv->lock, flags);
1358
1359         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1360                 if (beacon_int == 0) {
1361                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1362                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1363                 } else {
1364                         priv->rxon_timing.beacon_interval =
1365                                 cpu_to_le16(beacon_int);
1366                         priv->rxon_timing.beacon_interval =
1367                             iwl4965_adjust_beacon_interval(
1368                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1369                 }
1370
1371                 priv->rxon_timing.atim_window = 0;
1372         } else {
1373                 priv->rxon_timing.beacon_interval =
1374                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1375                 /* TODO: we need to get atim_window from upper stack
1376                  * for now we set to 0 */
1377                 priv->rxon_timing.atim_window = 0;
1378         }
1379
1380         interval_tm_unit =
1381                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1382         result = do_div(tsf, interval_tm_unit);
1383         priv->rxon_timing.beacon_init_val =
1384             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1385
1386         IWL_DEBUG_ASSOC
1387             ("beacon interval %d beacon timer %d beacon tim %d\n",
1388                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1389                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1390                 le16_to_cpu(priv->rxon_timing.atim_window));
1391 }
1392
1393 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1394 {
1395         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1396                 IWL_ERROR("APs don't scan.\n");
1397                 return 0;
1398         }
1399
1400         if (!iwl_is_ready_rf(priv)) {
1401                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1402                 return -EIO;
1403         }
1404
1405         if (test_bit(STATUS_SCANNING, &priv->status)) {
1406                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1407                 return -EAGAIN;
1408         }
1409
1410         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1411                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1412                                "Queuing.\n");
1413                 return -EAGAIN;
1414         }
1415
1416         IWL_DEBUG_INFO("Starting scan...\n");
1417         priv->scan_bands = 2;
1418         set_bit(STATUS_SCANNING, &priv->status);
1419         priv->scan_start = jiffies;
1420         priv->scan_pass_start = priv->scan_start;
1421
1422         queue_work(priv->workqueue, &priv->request_scan);
1423
1424         return 0;
1425 }
1426
1427
1428 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1429                                           enum ieee80211_band band)
1430 {
1431         if (band == IEEE80211_BAND_5GHZ) {
1432                 priv->staging_rxon.flags &=
1433                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1434                       | RXON_FLG_CCK_MSK);
1435                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1436         } else {
1437                 /* Copied from iwl4965_post_associate() */
1438                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1439                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1440                 else
1441                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1442
1443                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1444                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1445
1446                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1447                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1448                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1449         }
1450 }
1451
1452 /*
1453  * initialize rxon structure with default values from eeprom
1454  */
1455 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1456 {
1457         const struct iwl_channel_info *ch_info;
1458
1459         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1460
1461         switch (priv->iw_mode) {
1462         case IEEE80211_IF_TYPE_AP:
1463                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1464                 break;
1465
1466         case IEEE80211_IF_TYPE_STA:
1467                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1468                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1469                 break;
1470
1471         case IEEE80211_IF_TYPE_IBSS:
1472                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1473                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1474                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1475                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1476                 break;
1477
1478         case IEEE80211_IF_TYPE_MNTR:
1479                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1480                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1481                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1482                 break;
1483         default:
1484                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1485                 break;
1486         }
1487
1488 #if 0
1489         /* TODO:  Figure out when short_preamble would be set and cache from
1490          * that */
1491         if (!hw_to_local(priv->hw)->short_preamble)
1492                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1493         else
1494                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1495 #endif
1496
1497         ch_info = iwl_get_channel_info(priv, priv->band,
1498                                        le16_to_cpu(priv->staging_rxon.channel));
1499
1500         if (!ch_info)
1501                 ch_info = &priv->channel_info[0];
1502
1503         /*
1504          * in some case A channels are all non IBSS
1505          * in this case force B/G channel
1506          */
1507         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1508             !(is_channel_ibss(ch_info)))
1509                 ch_info = &priv->channel_info[0];
1510
1511         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1512         priv->band = ch_info->band;
1513
1514         iwl4965_set_flags_for_phymode(priv, priv->band);
1515
1516         priv->staging_rxon.ofdm_basic_rates =
1517             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1518         priv->staging_rxon.cck_basic_rates =
1519             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1520
1521         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1522                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1523         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1524         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1525         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1526         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1527         iwl_set_rxon_chain(priv);
1528 }
1529
1530 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1531 {
1532         if (mode == IEEE80211_IF_TYPE_IBSS) {
1533                 const struct iwl_channel_info *ch_info;
1534
1535                 ch_info = iwl_get_channel_info(priv,
1536                         priv->band,
1537                         le16_to_cpu(priv->staging_rxon.channel));
1538
1539                 if (!ch_info || !is_channel_ibss(ch_info)) {
1540                         IWL_ERROR("channel %d not IBSS channel\n",
1541                                   le16_to_cpu(priv->staging_rxon.channel));
1542                         return -EINVAL;
1543                 }
1544         }
1545
1546         priv->iw_mode = mode;
1547
1548         iwl4965_connection_init_rx_config(priv);
1549         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1550
1551         iwlcore_clear_stations_table(priv);
1552
1553         /* dont commit rxon if rf-kill is on*/
1554         if (!iwl_is_ready_rf(priv))
1555                 return -EAGAIN;
1556
1557         cancel_delayed_work(&priv->scan_check);
1558         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1559                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1560                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1561                 return -EAGAIN;
1562         }
1563
1564         iwl4965_commit_rxon(priv);
1565
1566         return 0;
1567 }
1568
1569 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1570                                       struct ieee80211_tx_control *ctl,
1571                                       struct iwl_cmd *cmd,
1572                                       struct sk_buff *skb_frag,
1573                                       int sta_id)
1574 {
1575         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1576         struct iwl_wep_key *wepkey;
1577         int keyidx = 0;
1578
1579         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1580
1581         switch (keyinfo->alg) {
1582         case ALG_CCMP:
1583                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1584                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1585                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1586                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1587                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1588                 break;
1589
1590         case ALG_TKIP:
1591                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1592                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1593                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1594                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1595                 break;
1596
1597         case ALG_WEP:
1598                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1599                 cmd->cmd.tx.sec_ctl = 0;
1600                 if (priv->default_wep_key) {
1601                         /* the WEP key was sent as static */
1602                         keyidx = ctl->hw_key->hw_key_idx;
1603                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1604                                                         wepkey->key_size);
1605                         if (wepkey->key_size == WEP_KEY_LEN_128)
1606                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1607                 } else {
1608                         /* the WEP key was sent as dynamic */
1609                         keyidx = keyinfo->keyidx;
1610                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1611                                                         keyinfo->keylen);
1612                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1613                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1614                 }
1615
1616                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1617                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1618
1619                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1620                              "with key %d\n", keyidx);
1621                 break;
1622
1623         default:
1624                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1625                 break;
1626         }
1627 }
1628
1629 /*
1630  * handle build REPLY_TX command notification.
1631  */
1632 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1633                                   struct iwl_cmd *cmd,
1634                                   struct ieee80211_tx_control *ctrl,
1635                                   struct ieee80211_hdr *hdr,
1636                                   int is_unicast, u8 std_id)
1637 {
1638         __le16 *qc;
1639         u16 fc = le16_to_cpu(hdr->frame_control);
1640         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1641
1642         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1643         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1644                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1645                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1646                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1647                 if (ieee80211_is_probe_response(fc) &&
1648                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1649                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1650         } else {
1651                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1652                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1653         }
1654
1655         if (ieee80211_is_back_request(fc))
1656                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1657
1658
1659         cmd->cmd.tx.sta_id = std_id;
1660         if (ieee80211_get_morefrag(hdr))
1661                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1662
1663         qc = ieee80211_get_qos_ctrl(hdr);
1664         if (qc) {
1665                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1666                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1667         } else
1668                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1669
1670         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1671                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1672                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1673         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1674                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1675                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1676         }
1677
1678         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1679                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1680
1681         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1682         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1683                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1684                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1685                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1686                 else
1687                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1688         } else {
1689                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1690         }
1691
1692         cmd->cmd.tx.driver_txop = 0;
1693         cmd->cmd.tx.tx_flags = tx_flags;
1694         cmd->cmd.tx.next_frame_len = 0;
1695 }
1696 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1697 {
1698         /* 0 - mgmt, 1 - cnt, 2 - data */
1699         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1700         priv->tx_stats[idx].cnt++;
1701         priv->tx_stats[idx].bytes += len;
1702 }
1703 /**
1704  * iwl4965_get_sta_id - Find station's index within station table
1705  *
1706  * If new IBSS station, create new entry in station table
1707  */
1708 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1709                                 struct ieee80211_hdr *hdr)
1710 {
1711         int sta_id;
1712         u16 fc = le16_to_cpu(hdr->frame_control);
1713         DECLARE_MAC_BUF(mac);
1714
1715         /* If this frame is broadcast or management, use broadcast station id */
1716         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1717             is_multicast_ether_addr(hdr->addr1))
1718                 return priv->hw_params.bcast_sta_id;
1719
1720         switch (priv->iw_mode) {
1721
1722         /* If we are a client station in a BSS network, use the special
1723          * AP station entry (that's the only station we communicate with) */
1724         case IEEE80211_IF_TYPE_STA:
1725                 return IWL_AP_ID;
1726
1727         /* If we are an AP, then find the station, or use BCAST */
1728         case IEEE80211_IF_TYPE_AP:
1729                 sta_id = iwl_find_station(priv, hdr->addr1);
1730                 if (sta_id != IWL_INVALID_STATION)
1731                         return sta_id;
1732                 return priv->hw_params.bcast_sta_id;
1733
1734         /* If this frame is going out to an IBSS network, find the station,
1735          * or create a new station table entry */
1736         case IEEE80211_IF_TYPE_IBSS:
1737                 sta_id = iwl_find_station(priv, hdr->addr1);
1738                 if (sta_id != IWL_INVALID_STATION)
1739                         return sta_id;
1740
1741                 /* Create new station table entry */
1742                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1743                                                    0, CMD_ASYNC, NULL);
1744
1745                 if (sta_id != IWL_INVALID_STATION)
1746                         return sta_id;
1747
1748                 IWL_DEBUG_DROP("Station %s not in station map. "
1749                                "Defaulting to broadcast...\n",
1750                                print_mac(mac, hdr->addr1));
1751                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1752                 return priv->hw_params.bcast_sta_id;
1753
1754         default:
1755                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1756                 return priv->hw_params.bcast_sta_id;
1757         }
1758 }
1759
1760 /*
1761  * start REPLY_TX command process
1762  */
1763 static int iwl4965_tx_skb(struct iwl_priv *priv,
1764                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1765 {
1766         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1767         struct iwl_tfd_frame *tfd;
1768         u32 *control_flags;
1769         int txq_id = ctl->queue;
1770         struct iwl4965_tx_queue *txq = NULL;
1771         struct iwl4965_queue *q = NULL;
1772         dma_addr_t phys_addr;
1773         dma_addr_t txcmd_phys;
1774         dma_addr_t scratch_phys;
1775         struct iwl_cmd *out_cmd = NULL;
1776         u16 len, idx, len_org;
1777         u8 id, hdr_len, unicast;
1778         u8 sta_id;
1779         u16 seq_number = 0;
1780         u16 fc;
1781         __le16 *qc;
1782         u8 wait_write_ptr = 0;
1783         unsigned long flags;
1784         int rc;
1785
1786         spin_lock_irqsave(&priv->lock, flags);
1787         if (iwl_is_rfkill(priv)) {
1788                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1789                 goto drop_unlock;
1790         }
1791
1792         if (!priv->vif) {
1793                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
1794                 goto drop_unlock;
1795         }
1796
1797         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
1798                 IWL_ERROR("ERROR: No TX rate available.\n");
1799                 goto drop_unlock;
1800         }
1801
1802         unicast = !is_multicast_ether_addr(hdr->addr1);
1803         id = 0;
1804
1805         fc = le16_to_cpu(hdr->frame_control);
1806
1807 #ifdef CONFIG_IWLWIFI_DEBUG
1808         if (ieee80211_is_auth(fc))
1809                 IWL_DEBUG_TX("Sending AUTH frame\n");
1810         else if (ieee80211_is_assoc_request(fc))
1811                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1812         else if (ieee80211_is_reassoc_request(fc))
1813                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1814 #endif
1815
1816         /* drop all data frame if we are not associated */
1817         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
1818            (!iwl_is_associated(priv) ||
1819             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
1820             !priv->assoc_station_added)) {
1821                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
1822                 goto drop_unlock;
1823         }
1824
1825         spin_unlock_irqrestore(&priv->lock, flags);
1826
1827         hdr_len = ieee80211_get_hdrlen(fc);
1828
1829         /* Find (or create) index into station table for destination station */
1830         sta_id = iwl4965_get_sta_id(priv, hdr);
1831         if (sta_id == IWL_INVALID_STATION) {
1832                 DECLARE_MAC_BUF(mac);
1833
1834                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
1835                                print_mac(mac, hdr->addr1));
1836                 goto drop;
1837         }
1838
1839         IWL_DEBUG_TX("station Id %d\n", sta_id);
1840
1841         qc = ieee80211_get_qos_ctrl(hdr);
1842         if (qc) {
1843                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
1844                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
1845                                 IEEE80211_SCTL_SEQ;
1846                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
1847                         (hdr->seq_ctrl &
1848                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
1849                 seq_number += 0x10;
1850 #ifdef CONFIG_IWL4965_HT
1851                 /* aggregation is on for this <sta,tid> */
1852                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1853                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
1854                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
1855 #endif /* CONFIG_IWL4965_HT */
1856         }
1857
1858         /* Descriptor for chosen Tx queue */
1859         txq = &priv->txq[txq_id];
1860         q = &txq->q;
1861
1862         spin_lock_irqsave(&priv->lock, flags);
1863
1864         /* Set up first empty TFD within this queue's circular TFD buffer */
1865         tfd = &txq->bd[q->write_ptr];
1866         memset(tfd, 0, sizeof(*tfd));
1867         control_flags = (u32 *) tfd;
1868         idx = get_cmd_index(q, q->write_ptr, 0);
1869
1870         /* Set up driver data for this TFD */
1871         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
1872         txq->txb[q->write_ptr].skb[0] = skb;
1873         memcpy(&(txq->txb[q->write_ptr].status.control),
1874                ctl, sizeof(struct ieee80211_tx_control));
1875
1876         /* Set up first empty entry in queue's array of Tx/cmd buffers */
1877         out_cmd = &txq->cmd[idx];
1878         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1879         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
1880
1881         /*
1882          * Set up the Tx-command (not MAC!) header.
1883          * Store the chosen Tx queue and TFD index within the sequence field;
1884          * after Tx, uCode's Tx response will return this value so driver can
1885          * locate the frame within the tx queue and do post-tx processing.
1886          */
1887         out_cmd->hdr.cmd = REPLY_TX;
1888         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1889                                 INDEX_TO_SEQ(q->write_ptr)));
1890
1891         /* Copy MAC header from skb into command buffer */
1892         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
1893
1894         /*
1895          * Use the first empty entry in this queue's command buffer array
1896          * to contain the Tx command and MAC header concatenated together
1897          * (payload data will be in another buffer).
1898          * Size of this varies, due to varying MAC header length.
1899          * If end is not dword aligned, we'll have 2 extra bytes at the end
1900          * of the MAC header (device reads on dword boundaries).
1901          * We'll tell device about this padding later.
1902          */
1903         len = priv->hw_params.tx_cmd_len +
1904                 sizeof(struct iwl_cmd_header) + hdr_len;
1905
1906         len_org = len;
1907         len = (len + 3) & ~3;
1908
1909         if (len_org != len)
1910                 len_org = 1;
1911         else
1912                 len_org = 0;
1913
1914         /* Physical address of this Tx command's header (not MAC header!),
1915          * within command buffer array. */
1916         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
1917                      offsetof(struct iwl_cmd, hdr);
1918
1919         /* Add buffer containing Tx command and MAC(!) header to TFD's
1920          * first entry */
1921         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
1922
1923         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
1924                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
1925
1926         /* Set up TFD's 2nd entry to point directly to remainder of skb,
1927          * if any (802.11 null frames have no payload). */
1928         len = skb->len - hdr_len;
1929         if (len) {
1930                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
1931                                            len, PCI_DMA_TODEVICE);
1932                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
1933         }
1934
1935         /* Tell 4965 about any 2-byte padding after MAC header */
1936         if (len_org)
1937                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1938
1939         /* Total # bytes to be transmitted */
1940         len = (u16)skb->len;
1941         out_cmd->cmd.tx.len = cpu_to_le16(len);
1942
1943         /* TODO need this for burst mode later on */
1944         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
1945
1946         /* set is_hcca to 0; it probably will never be implemented */
1947         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
1948
1949         iwl_update_tx_stats(priv, fc, len);
1950
1951         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
1952                 offsetof(struct iwl4965_tx_cmd, scratch);
1953         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
1954         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
1955
1956         if (!ieee80211_get_morefrag(hdr)) {
1957                 txq->need_update = 1;
1958                 if (qc) {
1959                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
1960                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
1961                 }
1962         } else {
1963                 wait_write_ptr = 1;
1964                 txq->need_update = 0;
1965         }
1966
1967         iwl_print_hex_dump(priv, IWL_DL_TX, out_cmd->cmd.payload,
1968                            sizeof(out_cmd->cmd.tx));
1969
1970         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
1971                            ieee80211_get_hdrlen(fc));
1972
1973         /* Set up entry for this TFD in Tx byte-count array */
1974         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
1975
1976         /* Tell device the write index *just past* this latest filled TFD */
1977         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1978         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
1979         spin_unlock_irqrestore(&priv->lock, flags);
1980
1981         if (rc)
1982                 return rc;
1983
1984         if ((iwl4965_queue_space(q) < q->high_mark)
1985             && priv->mac80211_registered) {
1986                 if (wait_write_ptr) {
1987                         spin_lock_irqsave(&priv->lock, flags);
1988                         txq->need_update = 1;
1989                         iwl4965_tx_queue_update_write_ptr(priv, txq);
1990                         spin_unlock_irqrestore(&priv->lock, flags);
1991                 }
1992
1993                 ieee80211_stop_queue(priv->hw, ctl->queue);
1994         }
1995
1996         return 0;
1997
1998 drop_unlock:
1999         spin_unlock_irqrestore(&priv->lock, flags);
2000 drop:
2001         return -1;
2002 }
2003
2004 static void iwl4965_set_rate(struct iwl_priv *priv)
2005 {
2006         const struct ieee80211_supported_band *hw = NULL;
2007         struct ieee80211_rate *rate;
2008         int i;
2009
2010         hw = iwl_get_hw_mode(priv, priv->band);
2011         if (!hw) {
2012                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2013                 return;
2014         }
2015
2016         priv->active_rate = 0;
2017         priv->active_rate_basic = 0;
2018
2019         for (i = 0; i < hw->n_bitrates; i++) {
2020                 rate = &(hw->bitrates[i]);
2021                 if (rate->hw_value < IWL_RATE_COUNT)
2022                         priv->active_rate |= (1 << rate->hw_value);
2023         }
2024
2025         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2026                        priv->active_rate, priv->active_rate_basic);
2027
2028         /*
2029          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2030          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2031          * OFDM
2032          */
2033         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2034                 priv->staging_rxon.cck_basic_rates =
2035                     ((priv->active_rate_basic &
2036                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2037         else
2038                 priv->staging_rxon.cck_basic_rates =
2039                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2040
2041         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2042                 priv->staging_rxon.ofdm_basic_rates =
2043                     ((priv->active_rate_basic &
2044                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2045                       IWL_FIRST_OFDM_RATE) & 0xFF;
2046         else
2047                 priv->staging_rxon.ofdm_basic_rates =
2048                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2049 }
2050
2051 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2052 {
2053         unsigned long flags;
2054
2055         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2056                 return;
2057
2058         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2059                           disable_radio ? "OFF" : "ON");
2060
2061         if (disable_radio) {
2062                 iwl4965_scan_cancel(priv);
2063                 /* FIXME: This is a workaround for AP */
2064                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2065                         spin_lock_irqsave(&priv->lock, flags);
2066                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2067                                     CSR_UCODE_SW_BIT_RFKILL);
2068                         spin_unlock_irqrestore(&priv->lock, flags);
2069                         /* call the host command only if no hw rf-kill set */
2070                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2071                             iwl_is_ready(priv))
2072                                 iwl4965_send_card_state(priv,
2073                                                         CARD_STATE_CMD_DISABLE,
2074                                                         0);
2075                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2076
2077                         /* make sure mac80211 stop sending Tx frame */
2078                         if (priv->mac80211_registered)
2079                                 ieee80211_stop_queues(priv->hw);
2080                 }
2081                 return;
2082         }
2083
2084         spin_lock_irqsave(&priv->lock, flags);
2085         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2086
2087         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2088         spin_unlock_irqrestore(&priv->lock, flags);
2089
2090         /* wake up ucode */
2091         msleep(10);
2092
2093         spin_lock_irqsave(&priv->lock, flags);
2094         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2095         if (!iwl_grab_nic_access(priv))
2096                 iwl_release_nic_access(priv);
2097         spin_unlock_irqrestore(&priv->lock, flags);
2098
2099         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2100                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2101                                   "disabled by HW switch\n");
2102                 return;
2103         }
2104
2105         queue_work(priv->workqueue, &priv->restart);
2106         return;
2107 }
2108
2109 #define IWL_PACKET_RETRY_TIME HZ
2110
2111 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2112 {
2113         u16 sc = le16_to_cpu(header->seq_ctrl);
2114         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2115         u16 frag = sc & IEEE80211_SCTL_FRAG;
2116         u16 *last_seq, *last_frag;
2117         unsigned long *last_time;
2118
2119         switch (priv->iw_mode) {
2120         case IEEE80211_IF_TYPE_IBSS:{
2121                 struct list_head *p;
2122                 struct iwl4965_ibss_seq *entry = NULL;
2123                 u8 *mac = header->addr2;
2124                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2125
2126                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2127                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2128                         if (!compare_ether_addr(entry->mac, mac))
2129                                 break;
2130                 }
2131                 if (p == &priv->ibss_mac_hash[index]) {
2132                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2133                         if (!entry) {
2134                                 IWL_ERROR("Cannot malloc new mac entry\n");
2135                                 return 0;
2136                         }
2137                         memcpy(entry->mac, mac, ETH_ALEN);
2138                         entry->seq_num = seq;
2139                         entry->frag_num = frag;
2140                         entry->packet_time = jiffies;
2141                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2142                         return 0;
2143                 }
2144                 last_seq = &entry->seq_num;
2145                 last_frag = &entry->frag_num;
2146                 last_time = &entry->packet_time;
2147                 break;
2148         }
2149         case IEEE80211_IF_TYPE_STA:
2150                 last_seq = &priv->last_seq_num;
2151                 last_frag = &priv->last_frag_num;
2152                 last_time = &priv->last_packet_time;
2153                 break;
2154         default:
2155                 return 0;
2156         }
2157         if ((*last_seq == seq) &&
2158             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2159                 if (*last_frag == frag)
2160                         goto drop;
2161                 if (*last_frag + 1 != frag)
2162                         /* out-of-order fragment */
2163                         goto drop;
2164         } else
2165                 *last_seq = seq;
2166
2167         *last_frag = frag;
2168         *last_time = jiffies;
2169         return 0;
2170
2171  drop:
2172         return 1;
2173 }
2174
2175 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2176
2177 #include "iwl-spectrum.h"
2178
2179 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2180 #define BEACON_TIME_MASK_HIGH   0xFF000000
2181 #define TIME_UNIT               1024
2182
2183 /*
2184  * extended beacon time format
2185  * time in usec will be changed into a 32-bit value in 8:24 format
2186  * the high 1 byte is the beacon counts
2187  * the lower 3 bytes is the time in usec within one beacon interval
2188  */
2189
2190 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2191 {
2192         u32 quot;
2193         u32 rem;
2194         u32 interval = beacon_interval * 1024;
2195
2196         if (!interval || !usec)
2197                 return 0;
2198
2199         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2200         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2201
2202         return (quot << 24) + rem;
2203 }
2204
2205 /* base is usually what we get from ucode with each received frame,
2206  * the same as HW timer counter counting down
2207  */
2208
2209 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2210 {
2211         u32 base_low = base & BEACON_TIME_MASK_LOW;
2212         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2213         u32 interval = beacon_interval * TIME_UNIT;
2214         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2215             (addon & BEACON_TIME_MASK_HIGH);
2216
2217         if (base_low > addon_low)
2218                 res += base_low - addon_low;
2219         else if (base_low < addon_low) {
2220                 res += interval + base_low - addon_low;
2221                 res += (1 << 24);
2222         } else
2223                 res += (1 << 24);
2224
2225         return cpu_to_le32(res);
2226 }
2227
2228 static int iwl4965_get_measurement(struct iwl_priv *priv,
2229                                struct ieee80211_measurement_params *params,
2230                                u8 type)
2231 {
2232         struct iwl4965_spectrum_cmd spectrum;
2233         struct iwl_rx_packet *res;
2234         struct iwl_host_cmd cmd = {
2235                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2236                 .data = (void *)&spectrum,
2237                 .meta.flags = CMD_WANT_SKB,
2238         };
2239         u32 add_time = le64_to_cpu(params->start_time);
2240         int rc;
2241         int spectrum_resp_status;
2242         int duration = le16_to_cpu(params->duration);
2243
2244         if (iwl_is_associated(priv))
2245                 add_time =
2246                     iwl4965_usecs_to_beacons(
2247                         le64_to_cpu(params->start_time) - priv->last_tsf,
2248                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2249
2250         memset(&spectrum, 0, sizeof(spectrum));
2251
2252         spectrum.channel_count = cpu_to_le16(1);
2253         spectrum.flags =
2254             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2255         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2256         cmd.len = sizeof(spectrum);
2257         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2258
2259         if (iwl_is_associated(priv))
2260                 spectrum.start_time =
2261                     iwl4965_add_beacon_time(priv->last_beacon_time,
2262                                 add_time,
2263                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2264         else
2265                 spectrum.start_time = 0;
2266
2267         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2268         spectrum.channels[0].channel = params->channel;
2269         spectrum.channels[0].type = type;
2270         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2271                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2272                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2273
2274         rc = iwl_send_cmd_sync(priv, &cmd);
2275         if (rc)
2276                 return rc;
2277
2278         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2279         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2280                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2281                 rc = -EIO;
2282         }
2283
2284         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2285         switch (spectrum_resp_status) {
2286         case 0:         /* Command will be handled */
2287                 if (res->u.spectrum.id != 0xff) {
2288                         IWL_DEBUG_INFO
2289                             ("Replaced existing measurement: %d\n",
2290                              res->u.spectrum.id);
2291                         priv->measurement_status &= ~MEASUREMENT_READY;
2292                 }
2293                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2294                 rc = 0;
2295                 break;
2296
2297         case 1:         /* Command will not be handled */
2298                 rc = -EAGAIN;
2299                 break;
2300         }
2301
2302         dev_kfree_skb_any(cmd.meta.u.skb);
2303
2304         return rc;
2305 }
2306 #endif
2307
2308 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2309                                  struct iwl4965_tx_info *tx_sta)
2310 {
2311
2312         tx_sta->status.ack_signal = 0;
2313         tx_sta->status.excessive_retries = 0;
2314
2315         if (in_interrupt())
2316                 ieee80211_tx_status_irqsafe(priv->hw,
2317                                             tx_sta->skb[0], &(tx_sta->status));
2318         else
2319                 ieee80211_tx_status(priv->hw,
2320                                     tx_sta->skb[0], &(tx_sta->status));
2321
2322         tx_sta->skb[0] = NULL;
2323 }
2324
2325 /**
2326  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2327  *
2328  * When FW advances 'R' index, all entries between old and new 'R' index
2329  * need to be reclaimed. As result, some free space forms.  If there is
2330  * enough free space (> low mark), wake the stack that feeds us.
2331  */
2332 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2333 {
2334         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2335         struct iwl4965_queue *q = &txq->q;
2336         int nfreed = 0;
2337
2338         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2339                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2340                           "is out of range [0-%d] %d %d.\n", txq_id,
2341                           index, q->n_bd, q->write_ptr, q->read_ptr);
2342                 return 0;
2343         }
2344
2345         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2346                 q->read_ptr != index;
2347                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2348                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2349                         iwl4965_txstatus_to_ieee(priv,
2350                                         &(txq->txb[txq->q.read_ptr]));
2351                         iwl_hw_txq_free_tfd(priv, txq);
2352                 } else if (nfreed > 1) {
2353                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2354                                         q->write_ptr, q->read_ptr);
2355                         queue_work(priv->workqueue, &priv->restart);
2356                 }
2357                 nfreed++;
2358         }
2359
2360         return nfreed;
2361 }
2362
2363 static int iwl4965_is_tx_success(u32 status)
2364 {
2365         status &= TX_STATUS_MSK;
2366         return (status == TX_STATUS_SUCCESS)
2367             || (status == TX_STATUS_DIRECT_DONE);
2368 }
2369
2370 /******************************************************************************
2371  *
2372  * Generic RX handler implementations
2373  *
2374  ******************************************************************************/
2375 #ifdef CONFIG_IWL4965_HT
2376
2377 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2378                                     struct ieee80211_hdr *hdr)
2379 {
2380         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2381                 return IWL_AP_ID;
2382         else {
2383                 u8 *da = ieee80211_get_DA(hdr);
2384                 return iwl_find_station(priv, da);
2385         }
2386 }
2387
2388 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2389         struct iwl_priv *priv, int txq_id, int idx)
2390 {
2391         if (priv->txq[txq_id].txb[idx].skb[0])
2392                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2393                                 txb[idx].skb[0]->data;
2394         return NULL;
2395 }
2396
2397 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2398 {
2399         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2400                                 tx_resp->frame_count);
2401         return le32_to_cpu(*scd_ssn) & MAX_SN;
2402
2403 }
2404
2405 /**
2406  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2407  */
2408 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2409                                       struct iwl_ht_agg *agg,
2410                                       struct iwl4965_tx_resp_agg *tx_resp,
2411                                       u16 start_idx)
2412 {
2413         u16 status;
2414         struct agg_tx_status *frame_status = &tx_resp->status;
2415         struct ieee80211_tx_status *tx_status = NULL;
2416         struct ieee80211_hdr *hdr = NULL;
2417         int i, sh;
2418         int txq_id, idx;
2419         u16 seq;
2420
2421         if (agg->wait_for_ba)
2422                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2423
2424         agg->frame_count = tx_resp->frame_count;
2425         agg->start_idx = start_idx;
2426         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2427         agg->bitmap = 0;
2428
2429         /* # frames attempted by Tx command */
2430         if (agg->frame_count == 1) {
2431                 /* Only one frame was attempted; no block-ack will arrive */
2432                 status = le16_to_cpu(frame_status[0].status);
2433                 seq  = le16_to_cpu(frame_status[0].sequence);
2434                 idx = SEQ_TO_INDEX(seq);
2435                 txq_id = SEQ_TO_QUEUE(seq);
2436
2437                 /* FIXME: code repetition */
2438                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2439                                    agg->frame_count, agg->start_idx, idx);
2440
2441                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2442                 tx_status->retry_count = tx_resp->failure_frame;
2443                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2444                 tx_status->flags = iwl4965_is_tx_success(status)?
2445                         IEEE80211_TX_STATUS_ACK : 0;
2446                 iwl4965_hwrate_to_tx_control(priv,
2447                                              le32_to_cpu(tx_resp->rate_n_flags),
2448                                              &tx_status->control);
2449                 /* FIXME: code repetition end */
2450
2451                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2452                                     status & 0xff, tx_resp->failure_frame);
2453                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2454                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2455
2456                 agg->wait_for_ba = 0;
2457         } else {
2458                 /* Two or more frames were attempted; expect block-ack */
2459                 u64 bitmap = 0;
2460                 int start = agg->start_idx;
2461
2462                 /* Construct bit-map of pending frames within Tx window */
2463                 for (i = 0; i < agg->frame_count; i++) {
2464                         u16 sc;
2465                         status = le16_to_cpu(frame_status[i].status);
2466                         seq  = le16_to_cpu(frame_status[i].sequence);
2467                         idx = SEQ_TO_INDEX(seq);
2468                         txq_id = SEQ_TO_QUEUE(seq);
2469
2470                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2471                                       AGG_TX_STATE_ABORT_MSK))
2472                                 continue;
2473
2474                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2475                                            agg->frame_count, txq_id, idx);
2476
2477                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2478
2479                         sc = le16_to_cpu(hdr->seq_ctrl);
2480                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2481                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2482                                           " idx=%d, seq_idx=%d, seq=%d\n",
2483                                           idx, SEQ_TO_SN(sc),
2484                                           hdr->seq_ctrl);
2485                                 return -1;
2486                         }
2487
2488                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2489                                            i, idx, SEQ_TO_SN(sc));
2490
2491                         sh = idx - start;
2492                         if (sh > 64) {
2493                                 sh = (start - idx) + 0xff;
2494                                 bitmap = bitmap << sh;
2495                                 sh = 0;
2496                                 start = idx;
2497                         } else if (sh < -64)
2498                                 sh  = 0xff - (start - idx);
2499                         else if (sh < 0) {
2500                                 sh = start - idx;
2501                                 start = idx;
2502                                 bitmap = bitmap << sh;
2503                                 sh = 0;
2504                         }
2505                         bitmap |= (1 << sh);
2506                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2507                                            start, (u32)(bitmap & 0xFFFFFFFF));
2508                 }
2509
2510                 agg->bitmap = bitmap;
2511                 agg->start_idx = start;
2512                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2513                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2514                                    agg->frame_count, agg->start_idx,
2515                                    (unsigned long long)agg->bitmap);
2516
2517                 if (bitmap)
2518                         agg->wait_for_ba = 1;
2519         }
2520         return 0;
2521 }
2522 #endif
2523
2524 /**
2525  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2526  */
2527 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2528                                 struct iwl_rx_mem_buffer *rxb)
2529 {
2530         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2531         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2532         int txq_id = SEQ_TO_QUEUE(sequence);
2533         int index = SEQ_TO_INDEX(sequence);
2534         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2535         struct ieee80211_tx_status *tx_status;
2536         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2537         u32  status = le32_to_cpu(tx_resp->status);
2538 #ifdef CONFIG_IWL4965_HT
2539         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2540         struct ieee80211_hdr *hdr;
2541         __le16 *qc;
2542 #endif
2543
2544         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2545                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2546                           "is out of range [0-%d] %d %d\n", txq_id,
2547                           index, txq->q.n_bd, txq->q.write_ptr,
2548                           txq->q.read_ptr);
2549                 return;
2550         }
2551
2552 #ifdef CONFIG_IWL4965_HT
2553         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2554         qc = ieee80211_get_qos_ctrl(hdr);
2555
2556         if (qc)
2557                 tid = le16_to_cpu(*qc) & 0xf;
2558
2559         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2560         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2561                 IWL_ERROR("Station not known\n");
2562                 return;
2563         }
2564
2565         if (txq->sched_retry) {
2566                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2567                 struct iwl_ht_agg *agg = NULL;
2568
2569                 if (!qc)
2570                         return;
2571
2572                 agg = &priv->stations[sta_id].tid[tid].agg;
2573
2574                 iwl4965_tx_status_reply_tx(priv, agg,
2575                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2576
2577                 if ((tx_resp->frame_count == 1) &&
2578                     !iwl4965_is_tx_success(status)) {
2579                         /* TODO: send BAR */
2580                 }
2581
2582                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2583                         int freed, ampdu_q;
2584                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2585                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2586                                            "%d index %d\n", scd_ssn , index);
2587                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2588                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2589
2590                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2591                             txq_id >= 0 && priv->mac80211_registered &&
2592                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2593                                 /* calculate mac80211 ampdu sw queue to wake */
2594                                 ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
2595                                           priv->hw->queues;
2596                                 if (agg->state == IWL_AGG_OFF)
2597                                         ieee80211_wake_queue(priv->hw, txq_id);
2598                                 else
2599                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2600                         }
2601                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2602                 }
2603         } else {
2604 #endif /* CONFIG_IWL4965_HT */
2605         tx_status = &(txq->txb[txq->q.read_ptr].status);
2606
2607         tx_status->retry_count = tx_resp->failure_frame;
2608         tx_status->flags =
2609             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2610         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2611                                      &tx_status->control);
2612
2613         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2614                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2615                      status, le32_to_cpu(tx_resp->rate_n_flags),
2616                      tx_resp->failure_frame);
2617
2618         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2619 #ifdef CONFIG_IWL4965_HT
2620         if (index != -1) {
2621                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2622                 if (tid != MAX_TID_COUNT)
2623                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2624                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2625                         (txq_id >= 0) && priv->mac80211_registered)
2626                         ieee80211_wake_queue(priv->hw, txq_id);
2627                 if (tid != MAX_TID_COUNT)
2628                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2629         }
2630         }
2631 #endif /* CONFIG_IWL4965_HT */
2632
2633         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2634                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2635 }
2636
2637
2638 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2639                                    struct iwl_rx_mem_buffer *rxb)
2640 {
2641         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2642         struct iwl4965_alive_resp *palive;
2643         struct delayed_work *pwork;
2644
2645         palive = &pkt->u.alive_frame;
2646
2647         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2648                        "0x%01X 0x%01X\n",
2649                        palive->is_valid, palive->ver_type,
2650                        palive->ver_subtype);
2651
2652         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2653                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2654                 memcpy(&priv->card_alive_init,
2655                        &pkt->u.alive_frame,
2656                        sizeof(struct iwl4965_init_alive_resp));
2657                 pwork = &priv->init_alive_start;
2658         } else {
2659                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2660                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2661                        sizeof(struct iwl4965_alive_resp));
2662                 pwork = &priv->alive_start;
2663         }
2664
2665         /* We delay the ALIVE response by 5ms to
2666          * give the HW RF Kill time to activate... */
2667         if (palive->is_valid == UCODE_VALID_OK)
2668                 queue_delayed_work(priv->workqueue, pwork,
2669                                    msecs_to_jiffies(5));
2670         else
2671                 IWL_WARNING("uCode did not respond OK.\n");
2672 }
2673
2674 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2675                                      struct iwl_rx_mem_buffer *rxb)
2676 {
2677         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2678
2679         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2680         return;
2681 }
2682
2683 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2684                                    struct iwl_rx_mem_buffer *rxb)
2685 {
2686         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2687
2688         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2689                 "seq 0x%04X ser 0x%08X\n",
2690                 le32_to_cpu(pkt->u.err_resp.error_type),
2691                 get_cmd_string(pkt->u.err_resp.cmd_id),
2692                 pkt->u.err_resp.cmd_id,
2693                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2694                 le32_to_cpu(pkt->u.err_resp.error_info));
2695 }
2696
2697 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2698
2699 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2700 {
2701         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2702         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2703         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2704         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2705                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2706         rxon->channel = csa->channel;
2707         priv->staging_rxon.channel = csa->channel;
2708 }
2709
2710 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2711                                           struct iwl_rx_mem_buffer *rxb)
2712 {
2713 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2714         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2715         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2716
2717         if (!report->state) {
2718                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2719                           "Spectrum Measure Notification: Start\n");
2720                 return;
2721         }
2722
2723         memcpy(&priv->measure_report, report, sizeof(*report));
2724         priv->measurement_status |= MEASUREMENT_READY;
2725 #endif
2726 }
2727
2728 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2729                                       struct iwl_rx_mem_buffer *rxb)
2730 {
2731 #ifdef CONFIG_IWLWIFI_DEBUG
2732         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2733         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2734         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2735                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2736 #endif
2737 }
2738
2739 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2740                                              struct iwl_rx_mem_buffer *rxb)
2741 {
2742         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2743         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2744                         "notification for %s:\n",
2745                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2746         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2747 }
2748
2749 static void iwl4965_bg_beacon_update(struct work_struct *work)
2750 {
2751         struct iwl_priv *priv =
2752                 container_of(work, struct iwl_priv, beacon_update);
2753         struct sk_buff *beacon;
2754
2755         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2756         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2757
2758         if (!beacon) {
2759                 IWL_ERROR("update beacon failed\n");
2760                 return;
2761         }
2762
2763         mutex_lock(&priv->mutex);
2764         /* new beacon skb is allocated every time; dispose previous.*/
2765         if (priv->ibss_beacon)
2766                 dev_kfree_skb(priv->ibss_beacon);
2767
2768         priv->ibss_beacon = beacon;
2769         mutex_unlock(&priv->mutex);
2770
2771         iwl4965_send_beacon_cmd(priv);
2772 }
2773
2774 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2775                                 struct iwl_rx_mem_buffer *rxb)
2776 {
2777 #ifdef CONFIG_IWLWIFI_DEBUG
2778         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2779         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2780         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2781
2782         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2783                 "tsf %d %d rate %d\n",
2784                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2785                 beacon->beacon_notify_hdr.failure_frame,
2786                 le32_to_cpu(beacon->ibss_mgr_status),
2787                 le32_to_cpu(beacon->high_tsf),
2788                 le32_to_cpu(beacon->low_tsf), rate);
2789 #endif
2790
2791         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
2792             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
2793                 queue_work(priv->workqueue, &priv->beacon_update);
2794 }
2795
2796 /* Service response to REPLY_SCAN_CMD (0x80) */
2797 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
2798                               struct iwl_rx_mem_buffer *rxb)
2799 {
2800 #ifdef CONFIG_IWLWIFI_DEBUG
2801         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2802         struct iwl4965_scanreq_notification *notif =
2803             (struct iwl4965_scanreq_notification *)pkt->u.raw;
2804
2805         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
2806 #endif
2807 }
2808
2809 /* Service SCAN_START_NOTIFICATION (0x82) */
2810 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
2811                                     struct iwl_rx_mem_buffer *rxb)
2812 {
2813         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2814         struct iwl4965_scanstart_notification *notif =
2815             (struct iwl4965_scanstart_notification *)pkt->u.raw;
2816         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
2817         IWL_DEBUG_SCAN("Scan start: "
2818                        "%d [802.11%s] "
2819                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
2820                        notif->channel,
2821                        notif->band ? "bg" : "a",
2822                        notif->tsf_high,
2823                        notif->tsf_low, notif->status, notif->beacon_timer);
2824 }
2825
2826 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
2827 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
2828                                       struct iwl_rx_mem_buffer *rxb)
2829 {
2830         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2831         struct iwl4965_scanresults_notification *notif =
2832             (struct iwl4965_scanresults_notification *)pkt->u.raw;
2833
2834         IWL_DEBUG_SCAN("Scan ch.res: "
2835                        "%d [802.11%s] "
2836                        "(TSF: 0x%08X:%08X) - %d "
2837                        "elapsed=%lu usec (%dms since last)\n",
2838                        notif->channel,
2839                        notif->band ? "bg" : "a",
2840                        le32_to_cpu(notif->tsf_high),
2841                        le32_to_cpu(notif->tsf_low),
2842                        le32_to_cpu(notif->statistics[0]),
2843                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
2844                        jiffies_to_msecs(elapsed_jiffies
2845                                         (priv->last_scan_jiffies, jiffies)));
2846
2847         priv->last_scan_jiffies = jiffies;
2848         priv->next_scan_jiffies = 0;
2849 }
2850
2851 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
2852 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
2853                                        struct iwl_rx_mem_buffer *rxb)
2854 {
2855         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2856         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
2857
2858         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
2859                        scan_notif->scanned_channels,
2860                        scan_notif->tsf_low,
2861                        scan_notif->tsf_high, scan_notif->status);
2862
2863         /* The HW is no longer scanning */
2864         clear_bit(STATUS_SCAN_HW, &priv->status);
2865
2866         /* The scan completion notification came in, so kill that timer... */
2867         cancel_delayed_work(&priv->scan_check);
2868
2869         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
2870                        (priv->scan_bands == 2) ? "2.4" : "5.2",
2871                        jiffies_to_msecs(elapsed_jiffies
2872                                         (priv->scan_pass_start, jiffies)));
2873
2874         /* Remove this scanned band from the list
2875          * of pending bands to scan */
2876         priv->scan_bands--;
2877
2878         /* If a request to abort was given, or the scan did not succeed
2879          * then we reset the scan state machine and terminate,
2880          * re-queuing another scan if one has been requested */
2881         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2882                 IWL_DEBUG_INFO("Aborted scan completed.\n");
2883                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
2884         } else {
2885                 /* If there are more bands on this scan pass reschedule */
2886                 if (priv->scan_bands > 0)
2887                         goto reschedule;
2888         }
2889
2890         priv->last_scan_jiffies = jiffies;
2891         priv->next_scan_jiffies = 0;
2892         IWL_DEBUG_INFO("Setting scan to off\n");
2893
2894         clear_bit(STATUS_SCANNING, &priv->status);
2895
2896         IWL_DEBUG_INFO("Scan took %dms\n",
2897                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
2898
2899         queue_work(priv->workqueue, &priv->scan_completed);
2900
2901         return;
2902
2903 reschedule:
2904         priv->scan_pass_start = jiffies;
2905         queue_work(priv->workqueue, &priv->request_scan);
2906 }
2907
2908 /* Handle notification from uCode that card's power state is changing
2909  * due to software, hardware, or critical temperature RFKILL */
2910 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
2911                                     struct iwl_rx_mem_buffer *rxb)
2912 {
2913         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2914         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
2915         unsigned long status = priv->status;
2916
2917         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
2918                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
2919                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
2920
2921         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
2922                      RF_CARD_DISABLED)) {
2923
2924                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2925                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2926
2927                 if (!iwl_grab_nic_access(priv)) {
2928                         iwl_write_direct32(
2929                                 priv, HBUS_TARG_MBX_C,
2930                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
2931
2932                         iwl_release_nic_access(priv);
2933                 }
2934
2935                 if (!(flags & RXON_CARD_DISABLED)) {
2936                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2937                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2938                         if (!iwl_grab_nic_access(priv)) {
2939                                 iwl_write_direct32(
2940                                         priv, HBUS_TARG_MBX_C,
2941                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
2942
2943                                 iwl_release_nic_access(priv);
2944                         }
2945                 }
2946
2947                 if (flags & RF_CARD_DISABLED) {
2948                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2949                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2950                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2951                         if (!iwl_grab_nic_access(priv))
2952                                 iwl_release_nic_access(priv);
2953                 }
2954         }
2955
2956         if (flags & HW_CARD_DISABLED)
2957                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2958         else
2959                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2960
2961
2962         if (flags & SW_CARD_DISABLED)
2963                 set_bit(STATUS_RF_KILL_SW, &priv->status);
2964         else
2965                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2966
2967         if (!(flags & RXON_CARD_DISABLED))
2968                 iwl4965_scan_cancel(priv);
2969
2970         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
2971              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
2972             (test_bit(STATUS_RF_KILL_SW, &status) !=
2973              test_bit(STATUS_RF_KILL_SW, &priv->status)))
2974                 queue_work(priv->workqueue, &priv->rf_kill);
2975         else
2976                 wake_up_interruptible(&priv->wait_command_queue);
2977 }
2978
2979 /**
2980  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
2981  *
2982  * Setup the RX handlers for each of the reply types sent from the uCode
2983  * to the host.
2984  *
2985  * This function chains into the hardware specific files for them to setup
2986  * any hardware specific handlers as well.
2987  */
2988 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
2989 {
2990         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
2991         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
2992         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
2993         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
2994         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
2995             iwl4965_rx_spectrum_measure_notif;
2996         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
2997         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
2998             iwl4965_rx_pm_debug_statistics_notif;
2999         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3000
3001         /*
3002          * The same handler is used for both the REPLY to a discrete
3003          * statistics request from the host as well as for the periodic
3004          * statistics notifications (after received beacons) from the uCode.
3005          */
3006         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3007         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3008
3009         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3010         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3011         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3012             iwl4965_rx_scan_results_notif;
3013         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3014             iwl4965_rx_scan_complete_notif;
3015         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3016         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3017
3018         /* Set up hardware specific Rx handlers */
3019         priv->cfg->ops->lib->rx_handler_setup(priv);
3020 }
3021
3022 /**
3023  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3024  * @rxb: Rx buffer to reclaim
3025  *
3026  * If an Rx buffer has an async callback associated with it the callback
3027  * will be executed.  The attached skb (if present) will only be freed
3028  * if the callback returns 1
3029  */
3030 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3031                                     struct iwl_rx_mem_buffer *rxb)
3032 {
3033         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3034         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3035         int txq_id = SEQ_TO_QUEUE(sequence);
3036         int index = SEQ_TO_INDEX(sequence);
3037         int huge = sequence & SEQ_HUGE_FRAME;
3038         int cmd_index;
3039         struct iwl_cmd *cmd;
3040
3041         /* If a Tx command is being handled and it isn't in the actual
3042          * command queue then there a command routing bug has been introduced
3043          * in the queue management code. */
3044         if (txq_id != IWL_CMD_QUEUE_NUM)
3045                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3046                           txq_id, pkt->hdr.cmd);
3047         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3048
3049         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3050         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3051
3052         /* Input error checking is done when commands are added to queue. */
3053         if (cmd->meta.flags & CMD_WANT_SKB) {
3054                 cmd->meta.source->u.skb = rxb->skb;
3055                 rxb->skb = NULL;
3056         } else if (cmd->meta.u.callback &&
3057                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3058                 rxb->skb = NULL;
3059
3060         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3061
3062         if (!(cmd->meta.flags & CMD_ASYNC)) {
3063                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3064                 wake_up_interruptible(&priv->wait_command_queue);
3065         }
3066 }
3067
3068 /*
3069  * this should be called while priv->lock is locked
3070 */
3071 static void __iwl_rx_replenish(struct iwl_priv *priv)
3072 {
3073         iwl_rx_allocate(priv);
3074         iwl_rx_queue_restock(priv);
3075 }
3076
3077
3078 /**
3079  * iwl_rx_handle - Main entry function for receiving responses from uCode
3080  *
3081  * Uses the priv->rx_handlers callback function array to invoke
3082  * the appropriate handlers, including command responses,
3083  * frame-received notifications, and other notifications.
3084  */
3085 void iwl_rx_handle(struct iwl_priv *priv)
3086 {
3087         struct iwl_rx_mem_buffer *rxb;
3088         struct iwl_rx_packet *pkt;
3089         struct iwl_rx_queue *rxq = &priv->rxq;
3090         u32 r, i;
3091         int reclaim;
3092         unsigned long flags;
3093         u8 fill_rx = 0;
3094         u32 count = 8;
3095
3096         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3097          * buffer that the driver may process (last buffer filled by ucode). */
3098         r = iwl4965_hw_get_rx_read(priv);
3099         i = rxq->read;
3100
3101         /* Rx interrupt, but nothing sent from uCode */
3102         if (i == r)
3103                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3104
3105         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3106                 fill_rx = 1;
3107
3108         while (i != r) {
3109                 rxb = rxq->queue[i];
3110
3111                 /* If an RXB doesn't have a Rx queue slot associated with it,
3112                  * then a bug has been introduced in the queue refilling
3113                  * routines -- catch it here */
3114                 BUG_ON(rxb == NULL);
3115
3116                 rxq->queue[i] = NULL;
3117
3118                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3119                                             priv->hw_params.rx_buf_size,
3120                                             PCI_DMA_FROMDEVICE);
3121                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3122
3123                 /* Reclaim a command buffer only if this packet is a response
3124                  *   to a (driver-originated) command.
3125                  * If the packet (e.g. Rx frame) originated from uCode,
3126                  *   there is no command buffer to reclaim.
3127                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3128                  *   but apparently a few don't get set; catch them here. */
3129                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3130                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3131                         (pkt->hdr.cmd != REPLY_RX) &&
3132                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3133                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3134                         (pkt->hdr.cmd != REPLY_TX);
3135
3136                 /* Based on type of command response or notification,
3137                  *   handle those that need handling via function in
3138                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3139                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3140                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3141                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3142                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3143                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3144                 } else {
3145                         /* No handling needed */
3146                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3147                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3148                                 r, i, get_cmd_string(pkt->hdr.cmd),
3149                                 pkt->hdr.cmd);
3150                 }
3151
3152                 if (reclaim) {
3153                         /* Invoke any callbacks, transfer the skb to caller, and
3154                          * fire off the (possibly) blocking iwl_send_cmd()
3155                          * as we reclaim the driver command queue */
3156                         if (rxb && rxb->skb)
3157                                 iwl4965_tx_cmd_complete(priv, rxb);
3158                         else
3159                                 IWL_WARNING("Claim null rxb?\n");
3160                 }
3161
3162                 /* For now we just don't re-use anything.  We can tweak this
3163                  * later to try and re-use notification packets and SKBs that
3164                  * fail to Rx correctly */
3165                 if (rxb->skb != NULL) {
3166                         priv->alloc_rxb_skb--;
3167                         dev_kfree_skb_any(rxb->skb);
3168                         rxb->skb = NULL;
3169                 }
3170
3171                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3172                                  priv->hw_params.rx_buf_size,
3173                                  PCI_DMA_FROMDEVICE);
3174                 spin_lock_irqsave(&rxq->lock, flags);
3175                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3176                 spin_unlock_irqrestore(&rxq->lock, flags);
3177                 i = (i + 1) & RX_QUEUE_MASK;
3178                 /* If there are a lot of unused frames,
3179                  * restock the Rx queue so ucode wont assert. */
3180                 if (fill_rx) {
3181                         count++;
3182                         if (count >= 8) {
3183                                 priv->rxq.read = i;
3184                                 __iwl_rx_replenish(priv);
3185                                 count = 0;
3186                         }
3187                 }
3188         }
3189
3190         /* Backtrack one entry */
3191         priv->rxq.read = i;
3192         iwl_rx_queue_restock(priv);
3193 }
3194 /* Convert linear signal-to-noise ratio into dB */
3195 static u8 ratio2dB[100] = {
3196 /*       0   1   2   3   4   5   6   7   8   9 */
3197          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3198         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3199         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3200         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3201         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3202         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3203         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3204         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3205         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3206         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3207 };
3208
3209 /* Calculates a relative dB value from a ratio of linear
3210  *   (i.e. not dB) signal levels.
3211  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3212 int iwl4965_calc_db_from_ratio(int sig_ratio)
3213 {
3214         /* 1000:1 or higher just report as 60 dB */
3215         if (sig_ratio >= 1000)
3216                 return 60;
3217
3218         /* 100:1 or higher, divide by 10 and use table,
3219          *   add 20 dB to make up for divide by 10 */
3220         if (sig_ratio >= 100)
3221                 return (20 + (int)ratio2dB[sig_ratio/10]);
3222
3223         /* We shouldn't see this */
3224         if (sig_ratio < 1)
3225                 return 0;
3226
3227         /* Use table for ratios 1:1 - 99:1 */
3228         return (int)ratio2dB[sig_ratio];
3229 }
3230
3231 #define PERFECT_RSSI (-20) /* dBm */
3232 #define WORST_RSSI (-95)   /* dBm */
3233 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3234
3235 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3236  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3237  *   about formulas used below. */
3238 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3239 {
3240         int sig_qual;
3241         int degradation = PERFECT_RSSI - rssi_dbm;
3242
3243         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3244          * as indicator; formula is (signal dbm - noise dbm).
3245          * SNR at or above 40 is a great signal (100%).
3246          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3247          * Weakest usable signal is usually 10 - 15 dB SNR. */
3248         if (noise_dbm) {
3249                 if (rssi_dbm - noise_dbm >= 40)
3250                         return 100;
3251                 else if (rssi_dbm < noise_dbm)
3252                         return 0;
3253                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3254
3255         /* Else use just the signal level.
3256          * This formula is a least squares fit of data points collected and
3257          *   compared with a reference system that had a percentage (%) display
3258          *   for signal quality. */
3259         } else
3260                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3261                             (15 * RSSI_RANGE + 62 * degradation)) /
3262                            (RSSI_RANGE * RSSI_RANGE);
3263
3264         if (sig_qual > 100)
3265                 sig_qual = 100;
3266         else if (sig_qual < 1)
3267                 sig_qual = 0;
3268
3269         return sig_qual;
3270 }
3271
3272 /**
3273  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3274  */
3275 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3276                                   struct iwl4965_tx_queue *txq)
3277 {
3278         u32 reg = 0;
3279         int rc = 0;
3280         int txq_id = txq->q.id;
3281
3282         if (txq->need_update == 0)
3283                 return rc;
3284
3285         /* if we're trying to save power */
3286         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3287                 /* wake up nic if it's powered down ...
3288                  * uCode will wake up, and interrupt us again, so next
3289                  * time we'll skip this part. */
3290                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3291
3292                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3293                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3294                         iwl_set_bit(priv, CSR_GP_CNTRL,
3295                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3296                         return rc;
3297                 }
3298
3299                 /* restore this queue's parameters in nic hardware. */
3300                 rc = iwl_grab_nic_access(priv);
3301                 if (rc)
3302                         return rc;
3303                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3304                                      txq->q.write_ptr | (txq_id << 8));
3305                 iwl_release_nic_access(priv);
3306
3307         /* else not in power-save mode, uCode will never sleep when we're
3308          * trying to tx (during RFKILL, we're not trying to tx). */
3309         } else
3310                 iwl_write32(priv, HBUS_TARG_WRPTR,
3311                             txq->q.write_ptr | (txq_id << 8));
3312
3313         txq->need_update = 0;
3314
3315         return rc;
3316 }
3317
3318 #ifdef CONFIG_IWLWIFI_DEBUG
3319 static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv)
3320 {
3321         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
3322         DECLARE_MAC_BUF(mac);
3323
3324         IWL_DEBUG_RADIO("RX CONFIG:\n");
3325         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3326         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3327         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3328         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3329                         le32_to_cpu(rxon->filter_flags));
3330         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3331         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3332                         rxon->ofdm_basic_rates);
3333         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3334         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3335                         print_mac(mac, rxon->node_addr));
3336         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3337                         print_mac(mac, rxon->bssid_addr));
3338         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3339 }
3340 #endif
3341
3342 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3343 {
3344         IWL_DEBUG_ISR("Enabling interrupts\n");
3345         set_bit(STATUS_INT_ENABLED, &priv->status);
3346         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3347 }
3348
3349 /* call this function to flush any scheduled tasklet */
3350 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3351 {
3352         /* wait to make sure we flush pedding tasklet*/
3353         synchronize_irq(priv->pci_dev->irq);
3354         tasklet_kill(&priv->irq_tasklet);
3355 }
3356
3357 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3358 {
3359         clear_bit(STATUS_INT_ENABLED, &priv->status);
3360
3361         /* disable interrupts from uCode/NIC to host */
3362         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3363
3364         /* acknowledge/clear/reset any interrupts still pending
3365          * from uCode or flow handler (Rx/Tx DMA) */
3366         iwl_write32(priv, CSR_INT, 0xffffffff);
3367         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3368         IWL_DEBUG_ISR("Disabled interrupts\n");
3369 }
3370
3371 static const char *desc_lookup(int i)
3372 {
3373         switch (i) {
3374         case 1:
3375                 return "FAIL";
3376         case 2:
3377                 return "BAD_PARAM";
3378         case 3:
3379                 return "BAD_CHECKSUM";
3380         case 4:
3381                 return "NMI_INTERRUPT";
3382         case 5:
3383                 return "SYSASSERT";
3384         case 6:
3385                 return "FATAL_ERROR";
3386         }
3387
3388         return "UNKNOWN";
3389 }
3390
3391 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3392 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3393
3394 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3395 {
3396         u32 data2, line;
3397         u32 desc, time, count, base, data1;
3398         u32 blink1, blink2, ilink1, ilink2;
3399         int rc;
3400
3401         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3402
3403         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3404                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3405                 return;
3406         }
3407
3408         rc = iwl_grab_nic_access(priv);
3409         if (rc) {
3410                 IWL_WARNING("Can not read from adapter at this time.\n");
3411                 return;
3412         }
3413
3414         count = iwl_read_targ_mem(priv, base);
3415
3416         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3417                 IWL_ERROR("Start IWL Error Log Dump:\n");
3418                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3419         }
3420
3421         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3422         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3423         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3424         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3425         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3426         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3427         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3428         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3429         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3430
3431         IWL_ERROR("Desc               Time       "
3432                   "data1      data2      line\n");
3433         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3434                   desc_lookup(desc), desc, time, data1, data2, line);
3435         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3436         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3437                   ilink1, ilink2);
3438
3439         iwl_release_nic_access(priv);
3440 }
3441
3442 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3443
3444 /**
3445  * iwl4965_print_event_log - Dump error event log to syslog
3446  *
3447  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3448  */
3449 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3450                                 u32 num_events, u32 mode)
3451 {
3452         u32 i;
3453         u32 base;       /* SRAM byte address of event log header */
3454         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3455         u32 ptr;        /* SRAM byte address of log data */
3456         u32 ev, time, data; /* event log data */
3457
3458         if (num_events == 0)
3459                 return;
3460
3461         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3462
3463         if (mode == 0)
3464                 event_size = 2 * sizeof(u32);
3465         else
3466                 event_size = 3 * sizeof(u32);
3467
3468         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3469
3470         /* "time" is actually "data" for mode 0 (no timestamp).
3471          * place event id # at far right for easier visual parsing. */
3472         for (i = 0; i < num_events; i++) {
3473                 ev = iwl_read_targ_mem(priv, ptr);
3474                 ptr += sizeof(u32);
3475                 time = iwl_read_targ_mem(priv, ptr);
3476                 ptr += sizeof(u32);
3477                 if (mode == 0)
3478                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
3479                 else {
3480                         data = iwl_read_targ_mem(priv, ptr);
3481                         ptr += sizeof(u32);
3482                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
3483                 }
3484         }
3485 }
3486
3487 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
3488 {
3489         int rc;
3490         u32 base;       /* SRAM byte address of event log header */
3491         u32 capacity;   /* event log capacity in # entries */
3492         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3493         u32 num_wraps;  /* # times uCode wrapped to top of log */
3494         u32 next_entry; /* index of next entry to be written by uCode */
3495         u32 size;       /* # entries that we'll print */
3496
3497         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3498         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3499                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
3500                 return;
3501         }
3502
3503         rc = iwl_grab_nic_access(priv);
3504         if (rc) {
3505                 IWL_WARNING("Can not read from adapter at this time.\n");
3506                 return;
3507         }
3508
3509         /* event log header */
3510         capacity = iwl_read_targ_mem(priv, base);
3511         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3512         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3513         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3514
3515         size = num_wraps ? capacity : next_entry;
3516
3517         /* bail out if nothing in log */
3518         if (size == 0) {
3519                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
3520                 iwl_release_nic_access(priv);
3521                 return;
3522         }
3523
3524         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
3525                   size, num_wraps);
3526
3527         /* if uCode has wrapped back to top of log, start at the oldest entry,
3528          * i.e the next one that uCode would fill. */
3529         if (num_wraps)
3530                 iwl4965_print_event_log(priv, next_entry,
3531                                     capacity - next_entry, mode);
3532
3533         /* (then/else) start at top of log */
3534         iwl4965_print_event_log(priv, 0, next_entry, mode);
3535
3536         iwl_release_nic_access(priv);
3537 }
3538
3539 /**
3540  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
3541  */
3542 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
3543 {
3544         /* Set the FW error flag -- cleared on iwl4965_down */
3545         set_bit(STATUS_FW_ERROR, &priv->status);
3546
3547         /* Cancel currently queued command. */
3548         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3549
3550 #ifdef CONFIG_IWLWIFI_DEBUG
3551         if (priv->debug_level & IWL_DL_FW_ERRORS) {
3552                 iwl4965_dump_nic_error_log(priv);
3553                 iwl4965_dump_nic_event_log(priv);
3554                 iwl4965_print_rx_config_cmd(priv);
3555         }
3556 #endif
3557
3558         wake_up_interruptible(&priv->wait_command_queue);
3559
3560         /* Keep the restart process from trying to send host
3561          * commands by clearing the INIT status bit */
3562         clear_bit(STATUS_READY, &priv->status);
3563
3564         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3565                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
3566                           "Restarting adapter due to uCode error.\n");
3567
3568                 if (iwl_is_associated(priv)) {
3569                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
3570                                sizeof(priv->recovery_rxon));
3571                         priv->error_recovering = 1;
3572                 }
3573                 queue_work(priv->workqueue, &priv->restart);
3574         }
3575 }
3576
3577 static void iwl4965_error_recovery(struct iwl_priv *priv)
3578 {
3579         unsigned long flags;
3580
3581         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
3582                sizeof(priv->staging_rxon));
3583         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3584         iwl4965_commit_rxon(priv);
3585
3586         iwl4965_rxon_add_station(priv, priv->bssid, 1);
3587
3588         spin_lock_irqsave(&priv->lock, flags);
3589         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
3590         priv->error_recovering = 0;
3591         spin_unlock_irqrestore(&priv->lock, flags);
3592 }
3593
3594 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
3595 {
3596         u32 inta, handled = 0;
3597         u32 inta_fh;
3598         unsigned long flags;
3599 #ifdef CONFIG_IWLWIFI_DEBUG
3600         u32 inta_mask;
3601 #endif
3602
3603         spin_lock_irqsave(&priv->lock, flags);
3604
3605         /* Ack/clear/reset pending uCode interrupts.
3606          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
3607          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
3608         inta = iwl_read32(priv, CSR_INT);
3609         iwl_write32(priv, CSR_INT, inta);
3610
3611         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
3612          * Any new interrupts that happen after this, either while we're
3613          * in this tasklet, or later, will show up in next ISR/tasklet. */
3614         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3615         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
3616
3617 #ifdef CONFIG_IWLWIFI_DEBUG
3618         if (priv->debug_level & IWL_DL_ISR) {
3619                 /* just for debug */
3620                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3621                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3622                               inta, inta_mask, inta_fh);
3623         }
3624 #endif
3625
3626         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
3627          * atomic, make sure that inta covers all the interrupts that
3628          * we've discovered, even if FH interrupt came in just after
3629          * reading CSR_INT. */
3630         if (inta_fh & CSR49_FH_INT_RX_MASK)
3631                 inta |= CSR_INT_BIT_FH_RX;
3632         if (inta_fh & CSR49_FH_INT_TX_MASK)
3633                 inta |= CSR_INT_BIT_FH_TX;
3634
3635         /* Now service all interrupt bits discovered above. */
3636         if (inta & CSR_INT_BIT_HW_ERR) {
3637                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
3638
3639                 /* Tell the device to stop sending interrupts */
3640                 iwl4965_disable_interrupts(priv);
3641
3642                 iwl4965_irq_handle_error(priv);
3643
3644                 handled |= CSR_INT_BIT_HW_ERR;
3645
3646                 spin_unlock_irqrestore(&priv->lock, flags);
3647
3648                 return;
3649         }
3650
3651 #ifdef CONFIG_IWLWIFI_DEBUG
3652         if (priv->debug_level & (IWL_DL_ISR)) {
3653                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
3654                 if (inta & CSR_INT_BIT_SCD)
3655                         IWL_DEBUG_ISR("Scheduler finished to transmit "
3656                                       "the frame/frames.\n");
3657
3658                 /* Alive notification via Rx interrupt will do the real work */
3659                 if (inta & CSR_INT_BIT_ALIVE)
3660                         IWL_DEBUG_ISR("Alive interrupt\n");
3661         }
3662 #endif
3663         /* Safely ignore these bits for debug checks below */
3664         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
3665
3666         /* HW RF KILL switch toggled */
3667         if (inta & CSR_INT_BIT_RF_KILL) {
3668                 int hw_rf_kill = 0;
3669                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
3670                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
3671                         hw_rf_kill = 1;
3672
3673                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
3674                                 "RF_KILL bit toggled to %s.\n",
3675                                 hw_rf_kill ? "disable radio":"enable radio");
3676
3677                 /* Queue restart only if RF_KILL switch was set to "kill"
3678                  *   when we loaded driver, and is now set to "enable".
3679                  * After we're Alive, RF_KILL gets handled by
3680                  *   iwl4965_rx_card_state_notif() */
3681                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
3682                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
3683                         queue_work(priv->workqueue, &priv->restart);
3684                 }
3685
3686                 handled |= CSR_INT_BIT_RF_KILL;
3687         }
3688
3689         /* Chip got too hot and stopped itself */
3690         if (inta & CSR_INT_BIT_CT_KILL) {
3691                 IWL_ERROR("Microcode CT kill error detected.\n");
3692                 handled |= CSR_INT_BIT_CT_KILL;
3693         }
3694
3695         /* Error detected by uCode */
3696         if (inta & CSR_INT_BIT_SW_ERR) {
3697                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
3698                           inta);
3699                 iwl4965_irq_handle_error(priv);
3700                 handled |= CSR_INT_BIT_SW_ERR;
3701         }
3702
3703         /* uCode wakes up after power-down sleep */
3704         if (inta & CSR_INT_BIT_WAKEUP) {
3705                 IWL_DEBUG_ISR("Wakeup interrupt\n");
3706                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
3707                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
3708                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
3709                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
3710                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
3711                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
3712                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
3713
3714                 handled |= CSR_INT_BIT_WAKEUP;
3715         }
3716
3717         /* All uCode command responses, including Tx command responses,
3718          * Rx "responses" (frame-received notification), and other
3719          * notifications from uCode come through here*/
3720         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
3721                 iwl_rx_handle(priv);
3722                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
3723         }
3724
3725         if (inta & CSR_INT_BIT_FH_TX) {
3726                 IWL_DEBUG_ISR("Tx interrupt\n");
3727                 handled |= CSR_INT_BIT_FH_TX;
3728         }
3729
3730         if (inta & ~handled)
3731                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
3732
3733         if (inta & ~CSR_INI_SET_MASK) {
3734                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
3735                          inta & ~CSR_INI_SET_MASK);
3736                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
3737         }
3738
3739         /* Re-enable all interrupts */
3740         /* only Re-enable if diabled by irq */
3741         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3742                 iwl4965_enable_interrupts(priv);
3743
3744 #ifdef CONFIG_IWLWIFI_DEBUG
3745         if (priv->debug_level & (IWL_DL_ISR)) {
3746                 inta = iwl_read32(priv, CSR_INT);
3747                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3748                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3749                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
3750                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
3751         }
3752 #endif
3753         spin_unlock_irqrestore(&priv->lock, flags);
3754 }
3755
3756 static irqreturn_t iwl4965_isr(int irq, void *data)
3757 {
3758         struct iwl_priv *priv = data;
3759         u32 inta, inta_mask;
3760         u32 inta_fh;
3761         if (!priv)
3762                 return IRQ_NONE;
3763
3764         spin_lock(&priv->lock);
3765
3766         /* Disable (but don't clear!) interrupts here to avoid
3767          *    back-to-back ISRs and sporadic interrupts from our NIC.
3768          * If we have something to service, the tasklet will re-enable ints.
3769          * If we *don't* have something, we'll re-enable before leaving here. */
3770         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
3771         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3772
3773         /* Discover which interrupts are active/pending */
3774         inta = iwl_read32(priv, CSR_INT);
3775         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3776
3777         /* Ignore interrupt if there's nothing in NIC to service.
3778          * This may be due to IRQ shared with another device,
3779          * or due to sporadic interrupts thrown from our NIC. */
3780         if (!inta && !inta_fh) {
3781                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
3782                 goto none;
3783         }
3784
3785         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
3786                 /* Hardware disappeared. It might have already raised
3787                  * an interrupt */
3788                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
3789                 goto unplugged;
3790         }
3791
3792         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3793                       inta, inta_mask, inta_fh);
3794
3795         inta &= ~CSR_INT_BIT_SCD;
3796
3797         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
3798         if (likely(inta || inta_fh))
3799                 tasklet_schedule(&priv->irq_tasklet);
3800
3801  unplugged:
3802         spin_unlock(&priv->lock);
3803         return IRQ_HANDLED;
3804
3805  none:
3806         /* re-enable interrupts here since we don't have anything to service. */
3807         /* only Re-enable if diabled by irq */
3808         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3809                 iwl4965_enable_interrupts(priv);
3810         spin_unlock(&priv->lock);
3811         return IRQ_NONE;
3812 }
3813
3814 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
3815  * sending probe req.  This should be set long enough to hear probe responses
3816  * from more than one AP.  */
3817 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
3818 #define IWL_ACTIVE_DWELL_TIME_52    (10)
3819
3820 /* For faster active scanning, scan will move to the next channel if fewer than
3821  * PLCP_QUIET_THRESH packets are heard on this channel within
3822  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
3823  * time if it's a quiet channel (nothing responded to our probe, and there's
3824  * no other traffic).
3825  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
3826 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
3827 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
3828
3829 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
3830  * Must be set longer than active dwell time.
3831  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
3832 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
3833 #define IWL_PASSIVE_DWELL_TIME_52   (10)
3834 #define IWL_PASSIVE_DWELL_BASE      (100)
3835 #define IWL_CHANNEL_TUNE_TIME       5
3836
3837 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
3838                                                 enum ieee80211_band band)
3839 {
3840         if (band == IEEE80211_BAND_5GHZ)
3841                 return IWL_ACTIVE_DWELL_TIME_52;
3842         else
3843                 return IWL_ACTIVE_DWELL_TIME_24;
3844 }
3845
3846 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
3847                                           enum ieee80211_band band)
3848 {
3849         u16 active = iwl4965_get_active_dwell_time(priv, band);
3850         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
3851             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
3852             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
3853
3854         if (iwl_is_associated(priv)) {
3855                 /* If we're associated, we clamp the maximum passive
3856                  * dwell time to be 98% of the beacon interval (minus
3857                  * 2 * channel tune time) */
3858                 passive = priv->beacon_int;
3859                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
3860                         passive = IWL_PASSIVE_DWELL_BASE;
3861                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
3862         }
3863
3864         if (passive <= active)
3865                 passive = active + 1;
3866
3867         return passive;
3868 }
3869
3870 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
3871                                          enum ieee80211_band band,
3872                                      u8 is_active, u8 direct_mask,
3873                                      struct iwl4965_scan_channel *scan_ch)
3874 {
3875         const struct ieee80211_channel *channels = NULL;
3876         const struct ieee80211_supported_band *sband;
3877         const struct iwl_channel_info *ch_info;
3878         u16 passive_dwell = 0;
3879         u16 active_dwell = 0;
3880         int added, i;
3881
3882         sband = iwl_get_hw_mode(priv, band);
3883         if (!sband)
3884                 return 0;
3885
3886         channels = sband->channels;
3887
3888         active_dwell = iwl4965_get_active_dwell_time(priv, band);
3889         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
3890
3891         for (i = 0, added = 0; i < sband->n_channels; i++) {
3892                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
3893                         continue;
3894
3895                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
3896
3897                 ch_info = iwl_get_channel_info(priv, band,
3898                                          scan_ch->channel);
3899                 if (!is_channel_valid(ch_info)) {
3900                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
3901                                        scan_ch->channel);
3902                         continue;
3903                 }
3904
3905                 if (!is_active || is_channel_passive(ch_info) ||
3906                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
3907                         scan_ch->type = 0;      /* passive */
3908                 else
3909                         scan_ch->type = 1;      /* active */
3910
3911                 if (scan_ch->type & 1)
3912                         scan_ch->type |= (direct_mask << 1);
3913
3914                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
3915                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
3916
3917                 /* Set txpower levels to defaults */
3918                 scan_ch->tpc.dsp_atten = 110;
3919                 /* scan_pwr_info->tpc.dsp_atten; */
3920
3921                 /*scan_pwr_info->tpc.tx_gain; */
3922                 if (band == IEEE80211_BAND_5GHZ)
3923                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
3924                 else {
3925                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
3926                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
3927                          * power level:
3928                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
3929                          */
3930                 }
3931
3932                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
3933                                scan_ch->channel,
3934                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
3935                                (scan_ch->type & 1) ?
3936                                active_dwell : passive_dwell);
3937
3938                 scan_ch++;
3939                 added++;
3940         }
3941
3942         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
3943         return added;
3944 }
3945
3946 /******************************************************************************
3947  *
3948  * uCode download functions
3949  *
3950  ******************************************************************************/
3951
3952 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
3953 {
3954         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
3955         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
3956         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
3957         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
3958         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
3959         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
3960 }
3961
3962 static void iwl4965_nic_start(struct iwl_priv *priv)
3963 {
3964         /* Remove all resets to allow NIC to operate */
3965         iwl_write32(priv, CSR_RESET, 0);
3966 }
3967
3968
3969 /**
3970  * iwl4965_read_ucode - Read uCode images from disk file.
3971  *
3972  * Copy into buffers for card to fetch via bus-mastering
3973  */
3974 static int iwl4965_read_ucode(struct iwl_priv *priv)
3975 {
3976         struct iwl4965_ucode *ucode;
3977         int ret;
3978         const struct firmware *ucode_raw;
3979         const char *name = priv->cfg->fw_name;
3980         u8 *src;
3981         size_t len;
3982         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
3983
3984         /* Ask kernel firmware_class module to get the boot firmware off disk.
3985          * request_firmware() is synchronous, file is in memory on return. */
3986         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
3987         if (ret < 0) {
3988                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
3989                                         name, ret);
3990                 goto error;
3991         }
3992
3993         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
3994                        name, ucode_raw->size);
3995
3996         /* Make sure that we got at least our header! */
3997         if (ucode_raw->size < sizeof(*ucode)) {
3998                 IWL_ERROR("File size way too small!\n");
3999                 ret = -EINVAL;
4000                 goto err_release;
4001         }
4002
4003         /* Data from ucode file:  header followed by uCode images */
4004         ucode = (void *)ucode_raw->data;
4005
4006         ver = le32_to_cpu(ucode->ver);
4007         inst_size = le32_to_cpu(ucode->inst_size);
4008         data_size = le32_to_cpu(ucode->data_size);
4009         init_size = le32_to_cpu(ucode->init_size);
4010         init_data_size = le32_to_cpu(ucode->init_data_size);
4011         boot_size = le32_to_cpu(ucode->boot_size);
4012
4013         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4014         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4015                        inst_size);
4016         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4017                        data_size);
4018         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4019                        init_size);
4020         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4021                        init_data_size);
4022         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4023                        boot_size);
4024
4025         /* Verify size of file vs. image size info in file's header */
4026         if (ucode_raw->size < sizeof(*ucode) +
4027                 inst_size + data_size + init_size +
4028                 init_data_size + boot_size) {
4029
4030                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4031                                (int)ucode_raw->size);
4032                 ret = -EINVAL;
4033                 goto err_release;
4034         }
4035
4036         /* Verify that uCode images will fit in card's SRAM */
4037         if (inst_size > priv->hw_params.max_inst_size) {
4038                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4039                                inst_size);
4040                 ret = -EINVAL;
4041                 goto err_release;
4042         }
4043
4044         if (data_size > priv->hw_params.max_data_size) {
4045                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4046                                 data_size);
4047                 ret = -EINVAL;
4048                 goto err_release;
4049         }
4050         if (init_size > priv->hw_params.max_inst_size) {
4051                 IWL_DEBUG_INFO
4052                     ("uCode init instr len %d too large to fit in\n",
4053                       init_size);
4054                 ret = -EINVAL;
4055                 goto err_release;
4056         }
4057         if (init_data_size > priv->hw_params.max_data_size) {
4058                 IWL_DEBUG_INFO
4059                     ("uCode init data len %d too large to fit in\n",
4060                       init_data_size);
4061                 ret = -EINVAL;
4062                 goto err_release;
4063         }
4064         if (boot_size > priv->hw_params.max_bsm_size) {
4065                 IWL_DEBUG_INFO
4066                     ("uCode boot instr len %d too large to fit in\n",
4067                       boot_size);
4068                 ret = -EINVAL;
4069                 goto err_release;
4070         }
4071
4072         /* Allocate ucode buffers for card's bus-master loading ... */
4073
4074         /* Runtime instructions and 2 copies of data:
4075          * 1) unmodified from disk
4076          * 2) backup cache for save/restore during power-downs */
4077         priv->ucode_code.len = inst_size;
4078         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4079
4080         priv->ucode_data.len = data_size;
4081         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4082
4083         priv->ucode_data_backup.len = data_size;
4084         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4085
4086         /* Initialization instructions and data */
4087         if (init_size && init_data_size) {
4088                 priv->ucode_init.len = init_size;
4089                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4090
4091                 priv->ucode_init_data.len = init_data_size;
4092                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4093
4094                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4095                         goto err_pci_alloc;
4096         }
4097
4098         /* Bootstrap (instructions only, no data) */
4099         if (boot_size) {
4100                 priv->ucode_boot.len = boot_size;
4101                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4102
4103                 if (!priv->ucode_boot.v_addr)
4104                         goto err_pci_alloc;
4105         }
4106
4107         /* Copy images into buffers for card's bus-master reads ... */
4108
4109         /* Runtime instructions (first block of data in file) */
4110         src = &ucode->data[0];
4111         len = priv->ucode_code.len;
4112         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4113         memcpy(priv->ucode_code.v_addr, src, len);
4114         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4115                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4116
4117         /* Runtime data (2nd block)
4118          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4119         src = &ucode->data[inst_size];
4120         len = priv->ucode_data.len;
4121         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4122         memcpy(priv->ucode_data.v_addr, src, len);
4123         memcpy(priv->ucode_data_backup.v_addr, src, len);
4124
4125         /* Initialization instructions (3rd block) */
4126         if (init_size) {
4127                 src = &ucode->data[inst_size + data_size];
4128                 len = priv->ucode_init.len;
4129                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4130                                 len);
4131                 memcpy(priv->ucode_init.v_addr, src, len);
4132         }
4133
4134         /* Initialization data (4th block) */
4135         if (init_data_size) {
4136                 src = &ucode->data[inst_size + data_size + init_size];
4137                 len = priv->ucode_init_data.len;
4138                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4139                                len);
4140                 memcpy(priv->ucode_init_data.v_addr, src, len);
4141         }
4142
4143         /* Bootstrap instructions (5th block) */
4144         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4145         len = priv->ucode_boot.len;
4146         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4147         memcpy(priv->ucode_boot.v_addr, src, len);
4148
4149         /* We have our copies now, allow OS release its copies */
4150         release_firmware(ucode_raw);
4151         return 0;
4152
4153  err_pci_alloc:
4154         IWL_ERROR("failed to allocate pci memory\n");
4155         ret = -ENOMEM;
4156         iwl4965_dealloc_ucode_pci(priv);
4157
4158  err_release:
4159         release_firmware(ucode_raw);
4160
4161  error:
4162         return ret;
4163 }
4164
4165
4166 /**
4167  * iwl4965_set_ucode_ptrs - Set uCode address location
4168  *
4169  * Tell initialization uCode where to find runtime uCode.
4170  *
4171  * BSM registers initially contain pointers to initialization uCode.
4172  * We need to replace them to load runtime uCode inst and data,
4173  * and to save runtime data when powering down.
4174  */
4175 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4176 {
4177         dma_addr_t pinst;
4178         dma_addr_t pdata;
4179         int rc = 0;
4180         unsigned long flags;
4181
4182         /* bits 35:4 for 4965 */
4183         pinst = priv->ucode_code.p_addr >> 4;
4184         pdata = priv->ucode_data_backup.p_addr >> 4;
4185
4186         spin_lock_irqsave(&priv->lock, flags);
4187         rc = iwl_grab_nic_access(priv);
4188         if (rc) {
4189                 spin_unlock_irqrestore(&priv->lock, flags);
4190                 return rc;
4191         }
4192
4193         /* Tell bootstrap uCode where to find image to load */
4194         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4195         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4196         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4197                                  priv->ucode_data.len);
4198
4199         /* Inst bytecount must be last to set up, bit 31 signals uCode
4200          *   that all new ptr/size info is in place */
4201         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4202                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4203
4204         iwl_release_nic_access(priv);
4205
4206         spin_unlock_irqrestore(&priv->lock, flags);
4207
4208         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4209
4210         return rc;
4211 }
4212
4213 /**
4214  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4215  *
4216  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4217  *
4218  * The 4965 "initialize" ALIVE reply contains calibration data for:
4219  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4220  *   (3945 does not contain this data).
4221  *
4222  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4223 */
4224 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4225 {
4226         /* Check alive response for "valid" sign from uCode */
4227         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4228                 /* We had an error bringing up the hardware, so take it
4229                  * all the way back down so we can try again */
4230                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4231                 goto restart;
4232         }
4233
4234         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4235          * This is a paranoid check, because we would not have gotten the
4236          * "initialize" alive if code weren't properly loaded.  */
4237         if (iwl_verify_ucode(priv)) {
4238                 /* Runtime instruction load was bad;
4239                  * take it all the way back down so we can try again */
4240                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4241                 goto restart;
4242         }
4243
4244         /* Calculate temperature */
4245         priv->temperature = iwl4965_get_temperature(priv);
4246
4247         /* Send pointers to protocol/runtime uCode image ... init code will
4248          * load and launch runtime uCode, which will send us another "Alive"
4249          * notification. */
4250         IWL_DEBUG_INFO("Initialization Alive received.\n");
4251         if (iwl4965_set_ucode_ptrs(priv)) {
4252                 /* Runtime instruction load won't happen;
4253                  * take it all the way back down so we can try again */
4254                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4255                 goto restart;
4256         }
4257         return;
4258
4259  restart:
4260         queue_work(priv->workqueue, &priv->restart);
4261 }
4262
4263
4264 /**
4265  * iwl4965_alive_start - called after REPLY_ALIVE notification received
4266  *                   from protocol/runtime uCode (initialization uCode's
4267  *                   Alive gets handled by iwl4965_init_alive_start()).
4268  */
4269 static void iwl4965_alive_start(struct iwl_priv *priv)
4270 {
4271         int ret = 0;
4272
4273         IWL_DEBUG_INFO("Runtime Alive received.\n");
4274
4275         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4276                 /* We had an error bringing up the hardware, so take it
4277                  * all the way back down so we can try again */
4278                 IWL_DEBUG_INFO("Alive failed.\n");
4279                 goto restart;
4280         }
4281
4282         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4283          * This is a paranoid check, because we would not have gotten the
4284          * "runtime" alive if code weren't properly loaded.  */
4285         if (iwl_verify_ucode(priv)) {
4286                 /* Runtime instruction load was bad;
4287                  * take it all the way back down so we can try again */
4288                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4289                 goto restart;
4290         }
4291
4292         iwlcore_clear_stations_table(priv);
4293
4294         ret = priv->cfg->ops->lib->alive_notify(priv);
4295         if (ret) {
4296                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4297                             ret);
4298                 goto restart;
4299         }
4300
4301         /* After the ALIVE response, we can send host commands to 4965 uCode */
4302         set_bit(STATUS_ALIVE, &priv->status);
4303
4304         /* Clear out the uCode error bit if it is set */
4305         clear_bit(STATUS_FW_ERROR, &priv->status);
4306
4307         if (iwl_is_rfkill(priv))
4308                 return;
4309
4310         ieee80211_start_queues(priv->hw);
4311
4312         priv->active_rate = priv->rates_mask;
4313         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4314
4315         if (iwl_is_associated(priv)) {
4316                 struct iwl4965_rxon_cmd *active_rxon =
4317                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4318
4319                 memcpy(&priv->staging_rxon, &priv->active_rxon,
4320                        sizeof(priv->staging_rxon));
4321                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4322         } else {
4323                 /* Initialize our rx_config data */
4324                 iwl4965_connection_init_rx_config(priv);
4325                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4326         }
4327
4328         /* Configure Bluetooth device coexistence support */
4329         iwl4965_send_bt_config(priv);
4330
4331         /* Configure the adapter for unassociated operation */
4332         iwl4965_commit_rxon(priv);
4333
4334         /* At this point, the NIC is initialized and operational */
4335         priv->notif_missed_beacons = 0;
4336
4337         iwl4965_rf_kill_ct_config(priv);
4338
4339         iwl_leds_register(priv);
4340
4341         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4342         set_bit(STATUS_READY, &priv->status);
4343         wake_up_interruptible(&priv->wait_command_queue);
4344
4345         if (priv->error_recovering)
4346                 iwl4965_error_recovery(priv);
4347
4348         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4349         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4350         return;
4351
4352  restart:
4353         queue_work(priv->workqueue, &priv->restart);
4354 }
4355
4356 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4357
4358 static void __iwl4965_down(struct iwl_priv *priv)
4359 {
4360         unsigned long flags;
4361         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4362         struct ieee80211_conf *conf = NULL;
4363
4364         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4365
4366         conf = ieee80211_get_hw_conf(priv->hw);
4367
4368         if (!exit_pending)
4369                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4370
4371         iwl_leds_unregister(priv);
4372
4373         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4374
4375         iwlcore_clear_stations_table(priv);
4376
4377         /* Unblock any waiting calls */
4378         wake_up_interruptible_all(&priv->wait_command_queue);
4379
4380         /* Wipe out the EXIT_PENDING status bit if we are not actually
4381          * exiting the module */
4382         if (!exit_pending)
4383                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4384
4385         /* stop and reset the on-board processor */
4386         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4387
4388         /* tell the device to stop sending interrupts */
4389         spin_lock_irqsave(&priv->lock, flags);
4390         iwl4965_disable_interrupts(priv);
4391         spin_unlock_irqrestore(&priv->lock, flags);
4392         iwl_synchronize_irq(priv);
4393
4394         if (priv->mac80211_registered)
4395                 ieee80211_stop_queues(priv->hw);
4396
4397         /* If we have not previously called iwl4965_init() then
4398          * clear all bits but the RF Kill and SUSPEND bits and return */
4399         if (!iwl_is_init(priv)) {
4400                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4401                                         STATUS_RF_KILL_HW |
4402                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4403                                         STATUS_RF_KILL_SW |
4404                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4405                                         STATUS_GEO_CONFIGURED |
4406                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4407                                         STATUS_IN_SUSPEND;
4408                 goto exit;
4409         }
4410
4411         /* ...otherwise clear out all the status bits but the RF Kill and
4412          * SUSPEND bits and continue taking the NIC down. */
4413         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4414                                 STATUS_RF_KILL_HW |
4415                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4416                                 STATUS_RF_KILL_SW |
4417                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4418                                 STATUS_GEO_CONFIGURED |
4419                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4420                                 STATUS_IN_SUSPEND |
4421                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4422                                 STATUS_FW_ERROR;
4423
4424         spin_lock_irqsave(&priv->lock, flags);
4425         iwl_clear_bit(priv, CSR_GP_CNTRL,
4426                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4427         spin_unlock_irqrestore(&priv->lock, flags);
4428
4429         iwl4965_hw_txq_ctx_stop(priv);
4430         iwl4965_hw_rxq_stop(priv);
4431
4432         spin_lock_irqsave(&priv->lock, flags);
4433         if (!iwl_grab_nic_access(priv)) {
4434                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4435                                          APMG_CLK_VAL_DMA_CLK_RQT);
4436                 iwl_release_nic_access(priv);
4437         }
4438         spin_unlock_irqrestore(&priv->lock, flags);
4439
4440         udelay(5);
4441
4442         iwl4965_hw_nic_stop_master(priv);
4443         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4444         iwl4965_hw_nic_reset(priv);
4445         priv->cfg->ops->lib->free_shared_mem(priv);
4446
4447  exit:
4448         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
4449
4450         if (priv->ibss_beacon)
4451                 dev_kfree_skb(priv->ibss_beacon);
4452         priv->ibss_beacon = NULL;
4453
4454         /* clear out any free frames */
4455         iwl4965_clear_free_frames(priv);
4456 }
4457
4458 static void iwl4965_down(struct iwl_priv *priv)
4459 {
4460         mutex_lock(&priv->mutex);
4461         __iwl4965_down(priv);
4462         mutex_unlock(&priv->mutex);
4463
4464         iwl4965_cancel_deferred_work(priv);
4465 }
4466
4467 #define MAX_HW_RESTARTS 5
4468
4469 static int __iwl4965_up(struct iwl_priv *priv)
4470 {
4471         int i;
4472         int ret;
4473
4474         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4475                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
4476                 return -EIO;
4477         }
4478
4479         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
4480                 IWL_WARNING("Radio disabled by SW RF kill (module "
4481                             "parameter)\n");
4482                 iwl_rfkill_set_hw_state(priv);
4483                 return -ENODEV;
4484         }
4485
4486         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
4487                 IWL_ERROR("ucode not available for device bringup\n");
4488                 return -EIO;
4489         }
4490
4491         /* If platform's RF_KILL switch is NOT set to KILL */
4492         if (iwl_read32(priv, CSR_GP_CNTRL) &
4493                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
4494                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4495         else {
4496                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4497                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
4498                         iwl_rfkill_set_hw_state(priv);
4499                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
4500                         return -ENODEV;
4501                 }
4502         }
4503
4504         iwl_rfkill_set_hw_state(priv);
4505         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4506
4507         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
4508         if (ret) {
4509                 IWL_ERROR("Unable to allocate shared memory\n");
4510                 return ret;
4511         }
4512
4513         ret = iwl_hw_nic_init(priv);
4514         if (ret) {
4515                 IWL_ERROR("Unable to init nic\n");
4516                 return ret;
4517         }
4518
4519         /* make sure rfkill handshake bits are cleared */
4520         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4521         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4522                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4523
4524         /* clear (again), then enable host interrupts */
4525         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4526         iwl4965_enable_interrupts(priv);
4527
4528         /* really make sure rfkill handshake bits are cleared */
4529         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4530         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4531
4532         /* Copy original ucode data image from disk into backup cache.
4533          * This will be used to initialize the on-board processor's
4534          * data SRAM for a clean start when the runtime program first loads. */
4535         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
4536                priv->ucode_data.len);
4537
4538         /* We return success when we resume from suspend and rf_kill is on. */
4539         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
4540                 return 0;
4541
4542         for (i = 0; i < MAX_HW_RESTARTS; i++) {
4543
4544                 iwlcore_clear_stations_table(priv);
4545
4546                 /* load bootstrap state machine,
4547                  * load bootstrap program into processor's memory,
4548                  * prepare to load the "initialize" uCode */
4549                 ret = priv->cfg->ops->lib->load_ucode(priv);
4550
4551                 if (ret) {
4552                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
4553                         continue;
4554                 }
4555
4556                 /* start card; "initialize" will load runtime ucode */
4557                 iwl4965_nic_start(priv);
4558
4559                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
4560
4561                 return 0;
4562         }
4563
4564         set_bit(STATUS_EXIT_PENDING, &priv->status);
4565         __iwl4965_down(priv);
4566
4567         /* tried to restart and config the device for as long as our
4568          * patience could withstand */
4569         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
4570         return -EIO;
4571 }
4572
4573
4574 /*****************************************************************************
4575  *
4576  * Workqueue callbacks
4577  *
4578  *****************************************************************************/
4579
4580 static void iwl4965_bg_init_alive_start(struct work_struct *data)
4581 {
4582         struct iwl_priv *priv =
4583             container_of(data, struct iwl_priv, init_alive_start.work);
4584
4585         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4586                 return;
4587
4588         mutex_lock(&priv->mutex);
4589         iwl4965_init_alive_start(priv);
4590         mutex_unlock(&priv->mutex);
4591 }
4592
4593 static void iwl4965_bg_alive_start(struct work_struct *data)
4594 {
4595         struct iwl_priv *priv =
4596             container_of(data, struct iwl_priv, alive_start.work);
4597
4598         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4599                 return;
4600
4601         mutex_lock(&priv->mutex);
4602         iwl4965_alive_start(priv);
4603         mutex_unlock(&priv->mutex);
4604 }
4605
4606 static void iwl4965_bg_rf_kill(struct work_struct *work)
4607 {
4608         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
4609
4610         wake_up_interruptible(&priv->wait_command_queue);
4611
4612         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4613                 return;
4614
4615         mutex_lock(&priv->mutex);
4616
4617         if (!iwl_is_rfkill(priv)) {
4618                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
4619                           "HW and/or SW RF Kill no longer active, restarting "
4620                           "device\n");
4621                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4622                         queue_work(priv->workqueue, &priv->restart);
4623         } else {
4624                 /* make sure mac80211 stop sending Tx frame */
4625                 if (priv->mac80211_registered)
4626                         ieee80211_stop_queues(priv->hw);
4627
4628                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
4629                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
4630                                           "disabled by SW switch\n");
4631                 else
4632                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
4633                                     "Kill switch must be turned off for "
4634                                     "wireless networking to work.\n");
4635         }
4636         iwl_rfkill_set_hw_state(priv);
4637
4638         mutex_unlock(&priv->mutex);
4639 }
4640
4641 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
4642
4643 static void iwl4965_bg_scan_check(struct work_struct *data)
4644 {
4645         struct iwl_priv *priv =
4646             container_of(data, struct iwl_priv, scan_check.work);
4647
4648         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4649                 return;
4650
4651         mutex_lock(&priv->mutex);
4652         if (test_bit(STATUS_SCANNING, &priv->status) ||
4653             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4654                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
4655                           "Scan completion watchdog resetting adapter (%dms)\n",
4656                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
4657
4658                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4659                         iwl4965_send_scan_abort(priv);
4660         }
4661         mutex_unlock(&priv->mutex);
4662 }
4663
4664 static void iwl4965_bg_request_scan(struct work_struct *data)
4665 {
4666         struct iwl_priv *priv =
4667             container_of(data, struct iwl_priv, request_scan);
4668         struct iwl_host_cmd cmd = {
4669                 .id = REPLY_SCAN_CMD,
4670                 .len = sizeof(struct iwl4965_scan_cmd),
4671                 .meta.flags = CMD_SIZE_HUGE,
4672         };
4673         struct iwl4965_scan_cmd *scan;
4674         struct ieee80211_conf *conf = NULL;
4675         u16 cmd_len;
4676         enum ieee80211_band band;
4677         u8 direct_mask;
4678         int ret = 0;
4679
4680         conf = ieee80211_get_hw_conf(priv->hw);
4681
4682         mutex_lock(&priv->mutex);
4683
4684         if (!iwl_is_ready(priv)) {
4685                 IWL_WARNING("request scan called when driver not ready.\n");
4686                 goto done;
4687         }
4688
4689         /* Make sure the scan wasn't cancelled before this queued work
4690          * was given the chance to run... */
4691         if (!test_bit(STATUS_SCANNING, &priv->status))
4692                 goto done;
4693
4694         /* This should never be called or scheduled if there is currently
4695          * a scan active in the hardware. */
4696         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
4697                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
4698                                "Ignoring second request.\n");
4699                 ret = -EIO;
4700                 goto done;
4701         }
4702
4703         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4704                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
4705                 goto done;
4706         }
4707
4708         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4709                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
4710                 goto done;
4711         }
4712
4713         if (iwl_is_rfkill(priv)) {
4714                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
4715                 goto done;
4716         }
4717
4718         if (!test_bit(STATUS_READY, &priv->status)) {
4719                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
4720                 goto done;
4721         }
4722
4723         if (!priv->scan_bands) {
4724                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
4725                 goto done;
4726         }
4727
4728         if (!priv->scan) {
4729                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
4730                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
4731                 if (!priv->scan) {
4732                         ret = -ENOMEM;
4733                         goto done;
4734                 }
4735         }
4736         scan = priv->scan;
4737         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
4738
4739         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
4740         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
4741
4742         if (iwl_is_associated(priv)) {
4743                 u16 interval = 0;
4744                 u32 extra;
4745                 u32 suspend_time = 100;
4746                 u32 scan_suspend_time = 100;
4747                 unsigned long flags;
4748
4749                 IWL_DEBUG_INFO("Scanning while associated...\n");
4750
4751                 spin_lock_irqsave(&priv->lock, flags);
4752                 interval = priv->beacon_int;
4753                 spin_unlock_irqrestore(&priv->lock, flags);
4754
4755                 scan->suspend_time = 0;
4756                 scan->max_out_time = cpu_to_le32(200 * 1024);
4757                 if (!interval)
4758                         interval = suspend_time;
4759
4760                 extra = (suspend_time / interval) << 22;
4761                 scan_suspend_time = (extra |
4762                     ((suspend_time % interval) * 1024));
4763                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
4764                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
4765                                scan_suspend_time, interval);
4766         }
4767
4768         /* We should add the ability for user to lock to PASSIVE ONLY */
4769         if (priv->one_direct_scan) {
4770                 IWL_DEBUG_SCAN
4771                     ("Kicking off one direct scan for '%s'\n",
4772                      iwl4965_escape_essid(priv->direct_ssid,
4773                                       priv->direct_ssid_len));
4774                 scan->direct_scan[0].id = WLAN_EID_SSID;
4775                 scan->direct_scan[0].len = priv->direct_ssid_len;
4776                 memcpy(scan->direct_scan[0].ssid,
4777                        priv->direct_ssid, priv->direct_ssid_len);
4778                 direct_mask = 1;
4779         } else if (!iwl_is_associated(priv) && priv->essid_len) {
4780                 IWL_DEBUG_SCAN
4781                   ("Kicking off one direct scan for '%s' when not associated\n",
4782                    iwl4965_escape_essid(priv->essid, priv->essid_len));
4783                 scan->direct_scan[0].id = WLAN_EID_SSID;
4784                 scan->direct_scan[0].len = priv->essid_len;
4785                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
4786                 direct_mask = 1;
4787         } else {
4788                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
4789                 direct_mask = 0;
4790         }
4791
4792         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
4793         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
4794         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
4795
4796
4797         switch (priv->scan_bands) {
4798         case 2:
4799                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
4800                 scan->tx_cmd.rate_n_flags =
4801                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
4802                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
4803
4804                 scan->good_CRC_th = 0;
4805                 band = IEEE80211_BAND_2GHZ;
4806                 break;
4807
4808         case 1:
4809                 scan->tx_cmd.rate_n_flags =
4810                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
4811                                 RATE_MCS_ANT_B_MSK);
4812                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
4813                 band = IEEE80211_BAND_5GHZ;
4814                 break;
4815
4816         default:
4817                 IWL_WARNING("Invalid scan band count\n");
4818                 goto done;
4819         }
4820
4821         /* We don't build a direct scan probe request; the uCode will do
4822          * that based on the direct_mask added to each channel entry */
4823         cmd_len = iwl4965_fill_probe_req(priv, band,
4824                                         (struct ieee80211_mgmt *)scan->data,
4825                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
4826
4827         scan->tx_cmd.len = cpu_to_le16(cmd_len);
4828         /* select Rx chains */
4829
4830         /* Force use of chains B and C (0x6) for scan Rx.
4831          * Avoid A (0x1) because of its off-channel reception on A-band.
4832          * MIMO is not used here, but value is required to make uCode happy. */
4833         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
4834                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
4835                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
4836                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
4837
4838         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
4839                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
4840
4841         if (direct_mask)
4842                 scan->channel_count =
4843                         iwl4965_get_channels_for_scan(
4844                                 priv, band, 1, /* active */
4845                                 direct_mask,
4846                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
4847         else
4848                 scan->channel_count =
4849                         iwl4965_get_channels_for_scan(
4850                                 priv, band, 0, /* passive */
4851                                 direct_mask,
4852                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
4853
4854         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
4855                                RXON_FILTER_BCON_AWARE_MSK);
4856         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
4857             scan->channel_count * sizeof(struct iwl4965_scan_channel);
4858         cmd.data = scan;
4859         scan->len = cpu_to_le16(cmd.len);
4860
4861         set_bit(STATUS_SCAN_HW, &priv->status);
4862         ret = iwl_send_cmd_sync(priv, &cmd);
4863         if (ret)
4864                 goto done;
4865
4866         queue_delayed_work(priv->workqueue, &priv->scan_check,
4867                            IWL_SCAN_CHECK_WATCHDOG);
4868
4869         mutex_unlock(&priv->mutex);
4870         return;
4871
4872  done:
4873         /* inform mac80211 scan aborted */
4874         queue_work(priv->workqueue, &priv->scan_completed);
4875         mutex_unlock(&priv->mutex);
4876 }
4877
4878 static void iwl4965_bg_up(struct work_struct *data)
4879 {
4880         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
4881
4882         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4883                 return;
4884
4885         mutex_lock(&priv->mutex);
4886         __iwl4965_up(priv);
4887         mutex_unlock(&priv->mutex);
4888 }
4889
4890 static void iwl4965_bg_restart(struct work_struct *data)
4891 {
4892         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
4893
4894         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4895                 return;
4896
4897         iwl4965_down(priv);
4898         queue_work(priv->workqueue, &priv->up);
4899 }
4900
4901 static void iwl4965_bg_rx_replenish(struct work_struct *data)
4902 {
4903         struct iwl_priv *priv =
4904             container_of(data, struct iwl_priv, rx_replenish);
4905
4906         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4907                 return;
4908
4909         mutex_lock(&priv->mutex);
4910         iwl_rx_replenish(priv);
4911         mutex_unlock(&priv->mutex);
4912 }
4913
4914 #define IWL_DELAY_NEXT_SCAN (HZ*2)
4915
4916 static void iwl4965_post_associate(struct iwl_priv *priv)
4917 {
4918         struct ieee80211_conf *conf = NULL;
4919         int ret = 0;
4920         DECLARE_MAC_BUF(mac);
4921
4922         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
4923                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
4924                 return;
4925         }
4926
4927         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
4928                         priv->assoc_id,
4929                         print_mac(mac, priv->active_rxon.bssid_addr));
4930
4931
4932         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4933                 return;
4934
4935
4936         if (!priv->vif || !priv->is_open)
4937                 return;
4938
4939         iwl4965_scan_cancel_timeout(priv, 200);
4940
4941         conf = ieee80211_get_hw_conf(priv->hw);
4942
4943         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4944         iwl4965_commit_rxon(priv);
4945
4946         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
4947         iwl4965_setup_rxon_timing(priv);
4948         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
4949                               sizeof(priv->rxon_timing), &priv->rxon_timing);
4950         if (ret)
4951                 IWL_WARNING("REPLY_RXON_TIMING failed - "
4952                             "Attempting to continue.\n");
4953
4954         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
4955
4956 #ifdef CONFIG_IWL4965_HT
4957         if (priv->current_ht_config.is_ht)
4958                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
4959 #endif /* CONFIG_IWL4965_HT*/
4960         iwl_set_rxon_chain(priv);
4961         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
4962
4963         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
4964                         priv->assoc_id, priv->beacon_int);
4965
4966         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
4967                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4968         else
4969                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4970
4971         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
4972                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
4973                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
4974                 else
4975                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4976
4977                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
4978                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4979
4980         }
4981
4982         iwl4965_commit_rxon(priv);
4983
4984         switch (priv->iw_mode) {
4985         case IEEE80211_IF_TYPE_STA:
4986                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
4987                 break;
4988
4989         case IEEE80211_IF_TYPE_IBSS:
4990
4991                 /* clear out the station table */
4992                 iwlcore_clear_stations_table(priv);
4993
4994                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
4995                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
4996                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
4997                 iwl4965_send_beacon_cmd(priv);
4998
4999                 break;
5000
5001         default:
5002                 IWL_ERROR("%s Should not be called in %d mode\n",
5003                                 __FUNCTION__, priv->iw_mode);
5004                 break;
5005         }
5006
5007         iwl4965_sequence_reset(priv);
5008
5009         /* Enable Rx differential gain and sensitivity calibrations */
5010         iwl_chain_noise_reset(priv);
5011         priv->start_calib = 1;
5012
5013         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5014                 priv->assoc_station_added = 1;
5015
5016         iwl4965_activate_qos(priv, 0);
5017
5018         iwl_power_update_mode(priv, 0);
5019         /* we have just associated, don't start scan too early */
5020         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5021 }
5022
5023
5024 static void iwl4965_bg_post_associate(struct work_struct *data)
5025 {
5026         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5027                                              post_associate.work);
5028
5029         mutex_lock(&priv->mutex);
5030         iwl4965_post_associate(priv);
5031         mutex_unlock(&priv->mutex);
5032
5033 }
5034
5035 static void iwl4965_bg_abort_scan(struct work_struct *work)
5036 {
5037         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5038
5039         if (!iwl_is_ready(priv))
5040                 return;
5041
5042         mutex_lock(&priv->mutex);
5043
5044         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5045         iwl4965_send_scan_abort(priv);
5046
5047         mutex_unlock(&priv->mutex);
5048 }
5049
5050 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5051
5052 static void iwl4965_bg_scan_completed(struct work_struct *work)
5053 {
5054         struct iwl_priv *priv =
5055             container_of(work, struct iwl_priv, scan_completed);
5056
5057         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5058
5059         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5060                 return;
5061
5062         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5063                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5064
5065         ieee80211_scan_completed(priv->hw);
5066
5067         /* Since setting the TXPOWER may have been deferred while
5068          * performing the scan, fire one off */
5069         mutex_lock(&priv->mutex);
5070         iwl4965_hw_reg_send_txpower(priv);
5071         mutex_unlock(&priv->mutex);
5072 }
5073
5074 /*****************************************************************************
5075  *
5076  * mac80211 entry point functions
5077  *
5078  *****************************************************************************/
5079
5080 #define UCODE_READY_TIMEOUT     (2 * HZ)
5081
5082 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5083 {
5084         struct iwl_priv *priv = hw->priv;
5085         int ret;
5086
5087         IWL_DEBUG_MAC80211("enter\n");
5088
5089         if (pci_enable_device(priv->pci_dev)) {
5090                 IWL_ERROR("Fail to pci_enable_device\n");
5091                 return -ENODEV;
5092         }
5093         pci_restore_state(priv->pci_dev);
5094         pci_enable_msi(priv->pci_dev);
5095
5096         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5097                           DRV_NAME, priv);
5098         if (ret) {
5099                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5100                 goto out_disable_msi;
5101         }
5102
5103         /* we should be verifying the device is ready to be opened */
5104         mutex_lock(&priv->mutex);
5105
5106         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5107         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5108          * ucode filename and max sizes are card-specific. */
5109
5110         if (!priv->ucode_code.len) {
5111                 ret = iwl4965_read_ucode(priv);
5112                 if (ret) {
5113                         IWL_ERROR("Could not read microcode: %d\n", ret);
5114                         mutex_unlock(&priv->mutex);
5115                         goto out_release_irq;
5116                 }
5117         }
5118
5119         ret = __iwl4965_up(priv);
5120
5121         mutex_unlock(&priv->mutex);
5122
5123         if (ret)
5124                 goto out_release_irq;
5125
5126         IWL_DEBUG_INFO("Start UP work done.\n");
5127
5128         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5129                 return 0;
5130
5131         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5132          * mac80211 will not be run successfully. */
5133         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5134                         test_bit(STATUS_READY, &priv->status),
5135                         UCODE_READY_TIMEOUT);
5136         if (!ret) {
5137                 if (!test_bit(STATUS_READY, &priv->status)) {
5138                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5139                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5140                         ret = -ETIMEDOUT;
5141                         goto out_release_irq;
5142                 }
5143         }
5144
5145         priv->is_open = 1;
5146         IWL_DEBUG_MAC80211("leave\n");
5147         return 0;
5148
5149 out_release_irq:
5150         free_irq(priv->pci_dev->irq, priv);
5151 out_disable_msi:
5152         pci_disable_msi(priv->pci_dev);
5153         pci_disable_device(priv->pci_dev);
5154         priv->is_open = 0;
5155         IWL_DEBUG_MAC80211("leave - failed\n");
5156         return ret;
5157 }
5158
5159 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5160 {
5161         struct iwl_priv *priv = hw->priv;
5162
5163         IWL_DEBUG_MAC80211("enter\n");
5164
5165         if (!priv->is_open) {
5166                 IWL_DEBUG_MAC80211("leave - skip\n");
5167                 return;
5168         }
5169
5170         priv->is_open = 0;
5171
5172         if (iwl_is_ready_rf(priv)) {
5173                 /* stop mac, cancel any scan request and clear
5174                  * RXON_FILTER_ASSOC_MSK BIT
5175                  */
5176                 mutex_lock(&priv->mutex);
5177                 iwl4965_scan_cancel_timeout(priv, 100);
5178                 cancel_delayed_work(&priv->post_associate);
5179                 mutex_unlock(&priv->mutex);
5180         }
5181
5182         iwl4965_down(priv);
5183
5184         flush_workqueue(priv->workqueue);
5185         free_irq(priv->pci_dev->irq, priv);
5186         pci_disable_msi(priv->pci_dev);
5187         pci_save_state(priv->pci_dev);
5188         pci_disable_device(priv->pci_dev);
5189
5190         IWL_DEBUG_MAC80211("leave\n");
5191 }
5192
5193 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5194                       struct ieee80211_tx_control *ctl)
5195 {
5196         struct iwl_priv *priv = hw->priv;
5197
5198         IWL_DEBUG_MAC80211("enter\n");
5199
5200         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5201                 IWL_DEBUG_MAC80211("leave - monitor\n");
5202                 return -1;
5203         }
5204
5205         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5206                      ctl->tx_rate->bitrate);
5207
5208         if (iwl4965_tx_skb(priv, skb, ctl))
5209                 dev_kfree_skb_any(skb);
5210
5211         IWL_DEBUG_MAC80211("leave\n");
5212         return 0;
5213 }
5214
5215 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5216                                  struct ieee80211_if_init_conf *conf)
5217 {
5218         struct iwl_priv *priv = hw->priv;
5219         unsigned long flags;
5220         DECLARE_MAC_BUF(mac);
5221
5222         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5223
5224         if (priv->vif) {
5225                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5226                 return -EOPNOTSUPP;
5227         }
5228
5229         spin_lock_irqsave(&priv->lock, flags);
5230         priv->vif = conf->vif;
5231
5232         spin_unlock_irqrestore(&priv->lock, flags);
5233
5234         mutex_lock(&priv->mutex);
5235
5236         if (conf->mac_addr) {
5237                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5238                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5239         }
5240
5241         if (iwl_is_ready(priv))
5242                 iwl4965_set_mode(priv, conf->type);
5243
5244         mutex_unlock(&priv->mutex);
5245
5246         IWL_DEBUG_MAC80211("leave\n");
5247         return 0;
5248 }
5249
5250 /**
5251  * iwl4965_mac_config - mac80211 config callback
5252  *
5253  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5254  * be set inappropriately and the driver currently sets the hardware up to
5255  * use it whenever needed.
5256  */
5257 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5258 {
5259         struct iwl_priv *priv = hw->priv;
5260         const struct iwl_channel_info *ch_info;
5261         unsigned long flags;
5262         int ret = 0;
5263
5264         mutex_lock(&priv->mutex);
5265         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5266
5267         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5268
5269         if (!iwl_is_ready(priv)) {
5270                 IWL_DEBUG_MAC80211("leave - not ready\n");
5271                 ret = -EIO;
5272                 goto out;
5273         }
5274
5275         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5276                      test_bit(STATUS_SCANNING, &priv->status))) {
5277                 IWL_DEBUG_MAC80211("leave - scanning\n");
5278                 set_bit(STATUS_CONF_PENDING, &priv->status);
5279                 mutex_unlock(&priv->mutex);
5280                 return 0;
5281         }
5282
5283         spin_lock_irqsave(&priv->lock, flags);
5284
5285         ch_info = iwl_get_channel_info(priv, conf->channel->band,
5286                         ieee80211_frequency_to_channel(conf->channel->center_freq));
5287         if (!is_channel_valid(ch_info)) {
5288                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5289                 spin_unlock_irqrestore(&priv->lock, flags);
5290                 ret = -EINVAL;
5291                 goto out;
5292         }
5293
5294 #ifdef CONFIG_IWL4965_HT
5295         /* if we are switching from ht to 2.4 clear flags
5296          * from any ht related info since 2.4 does not
5297          * support ht */
5298         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5299 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5300             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5301 #endif
5302         )
5303                 priv->staging_rxon.flags = 0;
5304 #endif /* CONFIG_IWL4965_HT */
5305
5306         iwl_set_rxon_channel(priv, conf->channel->band,
5307                 ieee80211_frequency_to_channel(conf->channel->center_freq));
5308
5309         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5310
5311         /* The list of supported rates and rate mask can be different
5312          * for each band; since the band may have changed, reset
5313          * the rate mask to what mac80211 lists */
5314         iwl4965_set_rate(priv);
5315
5316         spin_unlock_irqrestore(&priv->lock, flags);
5317
5318 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5319         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5320                 iwl4965_hw_channel_switch(priv, conf->channel);
5321                 goto out;
5322         }
5323 #endif
5324
5325         if (priv->cfg->ops->lib->radio_kill_sw)
5326                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5327
5328         if (!conf->radio_enabled) {
5329                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5330                 goto out;
5331         }
5332
5333         if (iwl_is_rfkill(priv)) {
5334                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5335                 ret = -EIO;
5336                 goto out;
5337         }
5338
5339         iwl4965_set_rate(priv);
5340
5341         if (memcmp(&priv->active_rxon,
5342                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
5343                 iwl4965_commit_rxon(priv);
5344         else
5345                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5346
5347         IWL_DEBUG_MAC80211("leave\n");
5348
5349 out:
5350         clear_bit(STATUS_CONF_PENDING, &priv->status);
5351         mutex_unlock(&priv->mutex);
5352         return ret;
5353 }
5354
5355 static void iwl4965_config_ap(struct iwl_priv *priv)
5356 {
5357         int ret = 0;
5358
5359         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5360                 return;
5361
5362         /* The following should be done only at AP bring up */
5363         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5364
5365                 /* RXON - unassoc (to set timing command) */
5366                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5367                 iwl4965_commit_rxon(priv);
5368
5369                 /* RXON Timing */
5370                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5371                 iwl4965_setup_rxon_timing(priv);
5372                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5373                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
5374                 if (ret)
5375                         IWL_WARNING("REPLY_RXON_TIMING failed - "
5376                                         "Attempting to continue.\n");
5377
5378                 iwl_set_rxon_chain(priv);
5379
5380                 /* FIXME: what should be the assoc_id for AP? */
5381                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5382                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5383                         priv->staging_rxon.flags |=
5384                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5385                 else
5386                         priv->staging_rxon.flags &=
5387                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5388
5389                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5390                         if (priv->assoc_capability &
5391                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5392                                 priv->staging_rxon.flags |=
5393                                         RXON_FLG_SHORT_SLOT_MSK;
5394                         else
5395                                 priv->staging_rxon.flags &=
5396                                         ~RXON_FLG_SHORT_SLOT_MSK;
5397
5398                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5399                                 priv->staging_rxon.flags &=
5400                                         ~RXON_FLG_SHORT_SLOT_MSK;
5401                 }
5402                 /* restore RXON assoc */
5403                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5404                 iwl4965_commit_rxon(priv);
5405                 iwl4965_activate_qos(priv, 1);
5406                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5407         }
5408         iwl4965_send_beacon_cmd(priv);
5409
5410         /* FIXME - we need to add code here to detect a totally new
5411          * configuration, reset the AP, unassoc, rxon timing, assoc,
5412          * clear sta table, add BCAST sta... */
5413 }
5414
5415 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5416                                         struct ieee80211_vif *vif,
5417                                     struct ieee80211_if_conf *conf)
5418 {
5419         struct iwl_priv *priv = hw->priv;
5420         DECLARE_MAC_BUF(mac);
5421         unsigned long flags;
5422         int rc;
5423
5424         if (conf == NULL)
5425                 return -EIO;
5426
5427         if (priv->vif != vif) {
5428                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5429                 return 0;
5430         }
5431
5432         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5433             (!conf->beacon || !conf->ssid_len)) {
5434                 IWL_DEBUG_MAC80211
5435                     ("Leaving in AP mode because HostAPD is not ready.\n");
5436                 return 0;
5437         }
5438
5439         if (!iwl_is_alive(priv))
5440                 return -EAGAIN;
5441
5442         mutex_lock(&priv->mutex);
5443
5444         if (conf->bssid)
5445                 IWL_DEBUG_MAC80211("bssid: %s\n",
5446                                    print_mac(mac, conf->bssid));
5447
5448 /*
5449  * very dubious code was here; the probe filtering flag is never set:
5450  *
5451         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5452             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5453  */
5454
5455         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5456                 if (!conf->bssid) {
5457                         conf->bssid = priv->mac_addr;
5458                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
5459                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
5460                                            print_mac(mac, conf->bssid));
5461                 }
5462                 if (priv->ibss_beacon)
5463                         dev_kfree_skb(priv->ibss_beacon);
5464
5465                 priv->ibss_beacon = conf->beacon;
5466         }
5467
5468         if (iwl_is_rfkill(priv))
5469                 goto done;
5470
5471         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
5472             !is_multicast_ether_addr(conf->bssid)) {
5473                 /* If there is currently a HW scan going on in the background
5474                  * then we need to cancel it else the RXON below will fail. */
5475                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
5476                         IWL_WARNING("Aborted scan still in progress "
5477                                     "after 100ms\n");
5478                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
5479                         mutex_unlock(&priv->mutex);
5480                         return -EAGAIN;
5481                 }
5482                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
5483
5484                 /* TODO: Audit driver for usage of these members and see
5485                  * if mac80211 deprecates them (priv->bssid looks like it
5486                  * shouldn't be there, but I haven't scanned the IBSS code
5487                  * to verify) - jpk */
5488                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
5489
5490                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
5491                         iwl4965_config_ap(priv);
5492                 else {
5493                         rc = iwl4965_commit_rxon(priv);
5494                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
5495                                 iwl4965_rxon_add_station(
5496                                         priv, priv->active_rxon.bssid_addr, 1);
5497                 }
5498
5499         } else {
5500                 iwl4965_scan_cancel_timeout(priv, 100);
5501                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5502                 iwl4965_commit_rxon(priv);
5503         }
5504
5505  done:
5506         spin_lock_irqsave(&priv->lock, flags);
5507         if (!conf->ssid_len)
5508                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5509         else
5510                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
5511
5512         priv->essid_len = conf->ssid_len;
5513         spin_unlock_irqrestore(&priv->lock, flags);
5514
5515         IWL_DEBUG_MAC80211("leave\n");
5516         mutex_unlock(&priv->mutex);
5517
5518         return 0;
5519 }
5520
5521 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
5522                                  unsigned int changed_flags,
5523                                  unsigned int *total_flags,
5524                                  int mc_count, struct dev_addr_list *mc_list)
5525 {
5526         /*
5527          * XXX: dummy
5528          * see also iwl4965_connection_init_rx_config
5529          */
5530         *total_flags = 0;
5531 }
5532
5533 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
5534                                      struct ieee80211_if_init_conf *conf)
5535 {
5536         struct iwl_priv *priv = hw->priv;
5537
5538         IWL_DEBUG_MAC80211("enter\n");
5539
5540         mutex_lock(&priv->mutex);
5541
5542         if (iwl_is_ready_rf(priv)) {
5543                 iwl4965_scan_cancel_timeout(priv, 100);
5544                 cancel_delayed_work(&priv->post_associate);
5545                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5546                 iwl4965_commit_rxon(priv);
5547         }
5548         if (priv->vif == conf->vif) {
5549                 priv->vif = NULL;
5550                 memset(priv->bssid, 0, ETH_ALEN);
5551                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5552                 priv->essid_len = 0;
5553         }
5554         mutex_unlock(&priv->mutex);
5555
5556         IWL_DEBUG_MAC80211("leave\n");
5557
5558 }
5559
5560 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
5561 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
5562                                      struct ieee80211_vif *vif,
5563                                      struct ieee80211_bss_conf *bss_conf,
5564                                      u32 changes)
5565 {
5566         struct iwl_priv *priv = hw->priv;
5567
5568         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
5569
5570         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5571                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
5572                                    bss_conf->use_short_preamble);
5573                 if (bss_conf->use_short_preamble)
5574                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5575                 else
5576                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5577         }
5578
5579         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5580                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5581                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
5582                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
5583                 else
5584                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5585         }
5586
5587         if (changes & BSS_CHANGED_HT) {
5588                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
5589                 iwl4965_ht_conf(priv, bss_conf);
5590                 iwl_set_rxon_chain(priv);
5591         }
5592
5593         if (changes & BSS_CHANGED_ASSOC) {
5594                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
5595                 /* This should never happen as this function should
5596                  * never be called from interrupt context. */
5597                 if (WARN_ON_ONCE(in_interrupt()))
5598                         return;
5599                 if (bss_conf->assoc) {
5600                         priv->assoc_id = bss_conf->aid;
5601                         priv->beacon_int = bss_conf->beacon_int;
5602                         priv->timestamp = bss_conf->timestamp;
5603                         priv->assoc_capability = bss_conf->assoc_capability;
5604                         priv->next_scan_jiffies = jiffies +
5605                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
5606                         mutex_lock(&priv->mutex);
5607                         iwl4965_post_associate(priv);
5608                         mutex_unlock(&priv->mutex);
5609                 } else {
5610                         priv->assoc_id = 0;
5611                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
5612                 }
5613         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
5614                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
5615                         iwl_send_rxon_assoc(priv);
5616         }
5617
5618 }
5619
5620 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
5621 {
5622         int rc = 0;
5623         unsigned long flags;
5624         struct iwl_priv *priv = hw->priv;
5625
5626         IWL_DEBUG_MAC80211("enter\n");
5627
5628         mutex_lock(&priv->mutex);
5629         spin_lock_irqsave(&priv->lock, flags);
5630
5631         if (!iwl_is_ready_rf(priv)) {
5632                 rc = -EIO;
5633                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
5634                 goto out_unlock;
5635         }
5636
5637         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
5638                 rc = -EIO;
5639                 IWL_ERROR("ERROR: APs don't scan\n");
5640                 goto out_unlock;
5641         }
5642
5643         /* we don't schedule scan within next_scan_jiffies period */
5644         if (priv->next_scan_jiffies &&
5645                         time_after(priv->next_scan_jiffies, jiffies)) {
5646                 rc = -EAGAIN;
5647                 goto out_unlock;
5648         }
5649         /* if we just finished scan ask for delay */
5650         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
5651                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
5652                 rc = -EAGAIN;
5653                 goto out_unlock;
5654         }
5655         if (len) {
5656                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
5657                                iwl4965_escape_essid(ssid, len), (int)len);
5658
5659                 priv->one_direct_scan = 1;
5660                 priv->direct_ssid_len = (u8)
5661                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
5662                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
5663         } else
5664                 priv->one_direct_scan = 0;
5665
5666         rc = iwl4965_scan_initiate(priv);
5667
5668         IWL_DEBUG_MAC80211("leave\n");
5669
5670 out_unlock:
5671         spin_unlock_irqrestore(&priv->lock, flags);
5672         mutex_unlock(&priv->mutex);
5673
5674         return rc;
5675 }
5676
5677 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
5678                         struct ieee80211_key_conf *keyconf, const u8 *addr,
5679                         u32 iv32, u16 *phase1key)
5680 {
5681         struct iwl_priv *priv = hw->priv;
5682         u8 sta_id = IWL_INVALID_STATION;
5683         unsigned long flags;
5684         __le16 key_flags = 0;
5685         int i;
5686         DECLARE_MAC_BUF(mac);
5687
5688         IWL_DEBUG_MAC80211("enter\n");
5689
5690         sta_id = iwl_find_station(priv, addr);
5691         if (sta_id == IWL_INVALID_STATION) {
5692                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5693                                    print_mac(mac, addr));
5694                 return;
5695         }
5696
5697         iwl4965_scan_cancel_timeout(priv, 100);
5698
5699         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
5700         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
5701         key_flags &= ~STA_KEY_FLG_INVALID;
5702
5703         if (sta_id == priv->hw_params.bcast_sta_id)
5704                 key_flags |= STA_KEY_MULTICAST_MSK;
5705
5706         spin_lock_irqsave(&priv->sta_lock, flags);
5707
5708         priv->stations[sta_id].sta.key.key_flags = key_flags;
5709         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
5710
5711         for (i = 0; i < 5; i++)
5712                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
5713                         cpu_to_le16(phase1key[i]);
5714
5715         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
5716         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
5717
5718         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
5719
5720         spin_unlock_irqrestore(&priv->sta_lock, flags);
5721
5722         IWL_DEBUG_MAC80211("leave\n");
5723 }
5724
5725 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5726                            const u8 *local_addr, const u8 *addr,
5727                            struct ieee80211_key_conf *key)
5728 {
5729         struct iwl_priv *priv = hw->priv;
5730         DECLARE_MAC_BUF(mac);
5731         int ret = 0;
5732         u8 sta_id = IWL_INVALID_STATION;
5733         u8 is_default_wep_key = 0;
5734
5735         IWL_DEBUG_MAC80211("enter\n");
5736
5737         if (priv->hw_params.sw_crypto) {
5738                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
5739                 return -EOPNOTSUPP;
5740         }
5741
5742         if (is_zero_ether_addr(addr))
5743                 /* only support pairwise keys */
5744                 return -EOPNOTSUPP;
5745
5746         sta_id = iwl_find_station(priv, addr);
5747         if (sta_id == IWL_INVALID_STATION) {
5748                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5749                                    print_mac(mac, addr));
5750                 return -EINVAL;
5751
5752         }
5753
5754         mutex_lock(&priv->mutex);
5755         iwl4965_scan_cancel_timeout(priv, 100);
5756         mutex_unlock(&priv->mutex);
5757
5758         /* If we are getting WEP group key and we didn't receive any key mapping
5759          * so far, we are in legacy wep mode (group key only), otherwise we are
5760          * in 1X mode.
5761          * In legacy wep mode, we use another host command to the uCode */
5762         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
5763                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
5764                 if (cmd == SET_KEY)
5765                         is_default_wep_key = !priv->key_mapping_key;
5766                 else
5767                         is_default_wep_key = priv->default_wep_key;
5768         }
5769
5770         switch (cmd) {
5771         case SET_KEY:
5772                 if (is_default_wep_key)
5773                         ret = iwl_set_default_wep_key(priv, key);
5774                 else
5775                         ret = iwl_set_dynamic_key(priv, key, sta_id);
5776
5777                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
5778                 break;
5779         case DISABLE_KEY:
5780                 if (is_default_wep_key)
5781                         ret = iwl_remove_default_wep_key(priv, key);
5782                 else
5783                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
5784
5785                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
5786                 break;
5787         default:
5788                 ret = -EINVAL;
5789         }
5790
5791         IWL_DEBUG_MAC80211("leave\n");
5792
5793         return ret;
5794 }
5795
5796 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
5797                            const struct ieee80211_tx_queue_params *params)
5798 {
5799         struct iwl_priv *priv = hw->priv;
5800         unsigned long flags;
5801         int q;
5802
5803         IWL_DEBUG_MAC80211("enter\n");
5804
5805         if (!iwl_is_ready_rf(priv)) {
5806                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
5807                 return -EIO;
5808         }
5809
5810         if (queue >= AC_NUM) {
5811                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
5812                 return 0;
5813         }
5814
5815         if (!priv->qos_data.qos_enable) {
5816                 priv->qos_data.qos_active = 0;
5817                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
5818                 return 0;
5819         }
5820         q = AC_NUM - 1 - queue;
5821
5822         spin_lock_irqsave(&priv->lock, flags);
5823
5824         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
5825         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
5826         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
5827         priv->qos_data.def_qos_parm.ac[q].edca_txop =
5828                         cpu_to_le16((params->txop * 32));
5829
5830         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
5831         priv->qos_data.qos_active = 1;
5832
5833         spin_unlock_irqrestore(&priv->lock, flags);
5834
5835         mutex_lock(&priv->mutex);
5836         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
5837                 iwl4965_activate_qos(priv, 1);
5838         else if (priv->assoc_id && iwl_is_associated(priv))
5839                 iwl4965_activate_qos(priv, 0);
5840
5841         mutex_unlock(&priv->mutex);
5842
5843         IWL_DEBUG_MAC80211("leave\n");
5844         return 0;
5845 }
5846
5847 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
5848                                 struct ieee80211_tx_queue_stats *stats)
5849 {
5850         struct iwl_priv *priv = hw->priv;
5851         int i, avail;
5852         struct iwl4965_tx_queue *txq;
5853         struct iwl4965_queue *q;
5854         unsigned long flags;
5855
5856         IWL_DEBUG_MAC80211("enter\n");
5857
5858         if (!iwl_is_ready_rf(priv)) {
5859                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
5860                 return -EIO;
5861         }
5862
5863         spin_lock_irqsave(&priv->lock, flags);
5864
5865         for (i = 0; i < AC_NUM; i++) {
5866                 txq = &priv->txq[i];
5867                 q = &txq->q;
5868                 avail = iwl4965_queue_space(q);
5869
5870                 stats[i].len = q->n_window - avail;
5871                 stats[i].limit = q->n_window - q->high_mark;
5872                 stats[i].count = q->n_window;
5873
5874         }
5875         spin_unlock_irqrestore(&priv->lock, flags);
5876
5877         IWL_DEBUG_MAC80211("leave\n");
5878
5879         return 0;
5880 }
5881
5882 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
5883                              struct ieee80211_low_level_stats *stats)
5884 {
5885         struct iwl_priv *priv = hw->priv;
5886
5887         priv = hw->priv;
5888         IWL_DEBUG_MAC80211("enter\n");
5889         IWL_DEBUG_MAC80211("leave\n");
5890
5891         return 0;
5892 }
5893
5894 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
5895 {
5896         struct iwl_priv *priv;
5897
5898         priv = hw->priv;
5899         IWL_DEBUG_MAC80211("enter\n");
5900         IWL_DEBUG_MAC80211("leave\n");
5901
5902         return 0;
5903 }
5904
5905 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
5906 {
5907         struct iwl_priv *priv = hw->priv;
5908         unsigned long flags;
5909
5910         mutex_lock(&priv->mutex);
5911         IWL_DEBUG_MAC80211("enter\n");
5912
5913         priv->lq_mngr.lq_ready = 0;
5914 #ifdef CONFIG_IWL4965_HT
5915         spin_lock_irqsave(&priv->lock, flags);
5916         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
5917         spin_unlock_irqrestore(&priv->lock, flags);
5918 #endif /* CONFIG_IWL4965_HT */
5919
5920         iwl_reset_qos(priv);
5921
5922         cancel_delayed_work(&priv->post_associate);
5923
5924         spin_lock_irqsave(&priv->lock, flags);
5925         priv->assoc_id = 0;
5926         priv->assoc_capability = 0;
5927         priv->assoc_station_added = 0;
5928
5929         /* new association get rid of ibss beacon skb */
5930         if (priv->ibss_beacon)
5931                 dev_kfree_skb(priv->ibss_beacon);
5932
5933         priv->ibss_beacon = NULL;
5934
5935         priv->beacon_int = priv->hw->conf.beacon_int;
5936         priv->timestamp = 0;
5937         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
5938                 priv->beacon_int = 0;
5939
5940         spin_unlock_irqrestore(&priv->lock, flags);
5941
5942         if (!iwl_is_ready_rf(priv)) {
5943                 IWL_DEBUG_MAC80211("leave - not ready\n");
5944                 mutex_unlock(&priv->mutex);
5945                 return;
5946         }
5947
5948         /* we are restarting association process
5949          * clear RXON_FILTER_ASSOC_MSK bit
5950          */
5951         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
5952                 iwl4965_scan_cancel_timeout(priv, 100);
5953                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5954                 iwl4965_commit_rxon(priv);
5955         }
5956
5957         iwl_power_update_mode(priv, 0);
5958
5959         /* Per mac80211.h: This is only used in IBSS mode... */
5960         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
5961
5962                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
5963                 mutex_unlock(&priv->mutex);
5964                 return;
5965         }
5966
5967         iwl4965_set_rate(priv);
5968
5969         mutex_unlock(&priv->mutex);
5970
5971         IWL_DEBUG_MAC80211("leave\n");
5972 }
5973
5974 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
5975                                  struct ieee80211_tx_control *control)
5976 {
5977         struct iwl_priv *priv = hw->priv;
5978         unsigned long flags;
5979
5980         mutex_lock(&priv->mutex);
5981         IWL_DEBUG_MAC80211("enter\n");
5982
5983         if (!iwl_is_ready_rf(priv)) {
5984                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
5985                 mutex_unlock(&priv->mutex);
5986                 return -EIO;
5987         }
5988
5989         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
5990                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
5991                 mutex_unlock(&priv->mutex);
5992                 return -EIO;
5993         }
5994
5995         spin_lock_irqsave(&priv->lock, flags);
5996
5997         if (priv->ibss_beacon)
5998                 dev_kfree_skb(priv->ibss_beacon);
5999
6000         priv->ibss_beacon = skb;
6001
6002         priv->assoc_id = 0;
6003
6004         IWL_DEBUG_MAC80211("leave\n");
6005         spin_unlock_irqrestore(&priv->lock, flags);
6006
6007         iwl_reset_qos(priv);
6008
6009         queue_work(priv->workqueue, &priv->post_associate.work);
6010
6011         mutex_unlock(&priv->mutex);
6012
6013         return 0;
6014 }
6015
6016 /*****************************************************************************
6017  *
6018  * sysfs attributes
6019  *
6020  *****************************************************************************/
6021
6022 #ifdef CONFIG_IWLWIFI_DEBUG
6023
6024 /*
6025  * The following adds a new attribute to the sysfs representation
6026  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6027  * used for controlling the debug level.
6028  *
6029  * See the level definitions in iwl for details.
6030  */
6031
6032 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6033 {
6034         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6035 }
6036 static ssize_t store_debug_level(struct device_driver *d,
6037                                  const char *buf, size_t count)
6038 {
6039         char *p = (char *)buf;
6040         u32 val;
6041
6042         val = simple_strtoul(p, &p, 0);
6043         if (p == buf)
6044                 printk(KERN_INFO DRV_NAME
6045                        ": %s is not in hex or decimal form.\n", buf);
6046         else
6047                 iwl_debug_level = val;
6048
6049         return strnlen(buf, count);
6050 }
6051
6052 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6053                    show_debug_level, store_debug_level);
6054
6055 #endif /* CONFIG_IWLWIFI_DEBUG */
6056
6057
6058 static ssize_t show_temperature(struct device *d,
6059                                 struct device_attribute *attr, char *buf)
6060 {
6061         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6062
6063         if (!iwl_is_alive(priv))
6064                 return -EAGAIN;
6065
6066         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6067 }
6068
6069 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6070
6071 static ssize_t show_rs_window(struct device *d,
6072                               struct device_attribute *attr,