Merge branch 'for-linus' of git://repo.or.cz/cris-mirror
[kernel.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
33 #include <linux/pci.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/wireless.h>
39 #include <linux/firmware.h>
40 #include <linux/etherdevice.h>
41 #include <linux/if_arp.h>
42
43 #include <net/mac80211.h>
44
45 #include <asm/div64.h>
46
47 #define DRV_NAME        "iwlagn"
48
49 #include "iwl-eeprom.h"
50 #include "iwl-dev.h"
51 #include "iwl-core.h"
52 #include "iwl-io.h"
53 #include "iwl-helpers.h"
54 #include "iwl-sta.h"
55 #include "iwl-calib.h"
56
57
58 /******************************************************************************
59  *
60  * module boiler plate
61  *
62  ******************************************************************************/
63
64 /*
65  * module name, copyright, version, etc.
66  */
67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
68
69 #ifdef CONFIG_IWLWIFI_DEBUG
70 #define VD "d"
71 #else
72 #define VD
73 #endif
74
75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
76 #define VS "s"
77 #else
78 #define VS
79 #endif
80
81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88 MODULE_ALIAS("iwl4965");
89
90 /*************** STATION TABLE MANAGEMENT ****
91  * mac80211 should be examined to determine if sta_info is duplicating
92  * the functionality provided here
93  */
94
95 /**************************************************************/
96
97 /**
98  * iwl_commit_rxon - commit staging_rxon to hardware
99  *
100  * The RXON command in staging_rxon is committed to the hardware and
101  * the active_rxon structure is updated with the new data.  This
102  * function correctly transitions out of the RXON_ASSOC_MSK state if
103  * a HW tune is required based on the RXON structure changes.
104  */
105 static int iwl_commit_rxon(struct iwl_priv *priv)
106 {
107         /* cast away the const for active_rxon in this function */
108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
109         int ret;
110         bool new_assoc =
111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
112
113         if (!iwl_is_alive(priv))
114                 return -EBUSY;
115
116         /* always get timestamp with Rx frame */
117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
118         /* allow CTS-to-self if possible. this is relevant only for
119          * 5000, but will not damage 4965 */
120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
121
122         ret = iwl_check_rxon_cmd(priv);
123         if (ret) {
124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
125                 return -EINVAL;
126         }
127
128         /* If we don't need to send a full RXON, we can use
129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
130          * and other flags for the current radio configuration. */
131         if (!iwl_full_rxon_required(priv)) {
132                 ret = iwl_send_rxon_assoc(priv);
133                 if (ret) {
134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
135                         return ret;
136                 }
137
138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
139                 return 0;
140         }
141
142         /* station table will be cleared */
143         priv->assoc_station_added = 0;
144
145         /* If we are currently associated and the new config requires
146          * an RXON_ASSOC and the new config wants the associated mask enabled,
147          * we must clear the associated from the active configuration
148          * before we apply the new config */
149         if (iwl_is_associated(priv) && new_assoc) {
150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
152
153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
154                                       sizeof(struct iwl_rxon_cmd),
155                                       &priv->active_rxon);
156
157                 /* If the mask clearing failed then we set
158                  * active_rxon back to what it was previously */
159                 if (ret) {
160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
162                         return ret;
163                 }
164         }
165
166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
168                        "* channel = %d\n"
169                        "* bssid = %pM\n",
170                        (new_assoc ? "" : "out"),
171                        le16_to_cpu(priv->staging_rxon.channel),
172                        priv->staging_rxon.bssid_addr);
173
174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
175
176         /* Apply the new configuration
177          * RXON unassoc clears the station table in uCode, send it before
178          * we add the bcast station. If assoc bit is set, we will send RXON
179          * after having added the bcast and bssid station.
180          */
181         if (!new_assoc) {
182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
184                 if (ret) {
185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
186                         return ret;
187                 }
188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
189         }
190
191         iwl_clear_stations_table(priv);
192
193         if (!priv->error_recovering)
194                 priv->start_calib = 0;
195
196         /* Add the broadcast address so we can send broadcast frames */
197         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
198                                                 IWL_INVALID_STATION) {
199                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
200                 return -EIO;
201         }
202
203         /* If we have set the ASSOC_MSK and we are in BSS mode then
204          * add the IWL_AP_ID to the station rate table */
205         if (new_assoc) {
206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
207                         ret = iwl_rxon_add_station(priv,
208                                            priv->active_rxon.bssid_addr, 1);
209                         if (ret == IWL_INVALID_STATION) {
210                                 IWL_ERR(priv,
211                                         "Error adding AP address for TX.\n");
212                                 return -EIO;
213                         }
214                         priv->assoc_station_added = 1;
215                         if (priv->default_wep_key &&
216                             iwl_send_static_wepkey_cmd(priv, 0))
217                                 IWL_ERR(priv,
218                                         "Could not send WEP static key.\n");
219                 }
220
221                 /* Apply the new configuration
222                  * RXON assoc doesn't clear the station table in uCode,
223                  */
224                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
225                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
226                 if (ret) {
227                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
228                         return ret;
229                 }
230                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
231         }
232
233         iwl_init_sensitivity(priv);
234
235         /* If we issue a new RXON command which required a tune then we must
236          * send a new TXPOWER command or we won't be able to Tx any frames */
237         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
238         if (ret) {
239                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
240                 return ret;
241         }
242
243         return 0;
244 }
245
246 void iwl_update_chain_flags(struct iwl_priv *priv)
247 {
248
249         iwl_set_rxon_chain(priv);
250         iwl_commit_rxon(priv);
251 }
252
253 static void iwl_clear_free_frames(struct iwl_priv *priv)
254 {
255         struct list_head *element;
256
257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
258                        priv->frames_count);
259
260         while (!list_empty(&priv->free_frames)) {
261                 element = priv->free_frames.next;
262                 list_del(element);
263                 kfree(list_entry(element, struct iwl_frame, list));
264                 priv->frames_count--;
265         }
266
267         if (priv->frames_count) {
268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
269                             priv->frames_count);
270                 priv->frames_count = 0;
271         }
272 }
273
274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
275 {
276         struct iwl_frame *frame;
277         struct list_head *element;
278         if (list_empty(&priv->free_frames)) {
279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
280                 if (!frame) {
281                         IWL_ERR(priv, "Could not allocate frame!\n");
282                         return NULL;
283                 }
284
285                 priv->frames_count++;
286                 return frame;
287         }
288
289         element = priv->free_frames.next;
290         list_del(element);
291         return list_entry(element, struct iwl_frame, list);
292 }
293
294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
295 {
296         memset(frame, 0, sizeof(*frame));
297         list_add(&frame->list, &priv->free_frames);
298 }
299
300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
301                                           struct ieee80211_hdr *hdr,
302                                           int left)
303 {
304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
306              (priv->iw_mode != NL80211_IFTYPE_AP)))
307                 return 0;
308
309         if (priv->ibss_beacon->len > left)
310                 return 0;
311
312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
313
314         return priv->ibss_beacon->len;
315 }
316
317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
318                                        struct iwl_frame *frame, u8 rate)
319 {
320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
321         unsigned int frame_size;
322
323         tx_beacon_cmd = &frame->u.beacon;
324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
325
326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
328
329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
331
332         BUG_ON(frame_size > MAX_MPDU_SIZE);
333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
334
335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
336                 tx_beacon_cmd->tx.rate_n_flags =
337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
338         else
339                 tx_beacon_cmd->tx.rate_n_flags =
340                         iwl_hw_set_rate_n_flags(rate, 0);
341
342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
343                                      TX_CMD_FLG_TSF_MSK |
344                                      TX_CMD_FLG_STA_RATE_MSK;
345
346         return sizeof(*tx_beacon_cmd) + frame_size;
347 }
348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
349 {
350         struct iwl_frame *frame;
351         unsigned int frame_size;
352         int rc;
353         u8 rate;
354
355         frame = iwl_get_free_frame(priv);
356
357         if (!frame) {
358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
359                           "command.\n");
360                 return -ENOMEM;
361         }
362
363         rate = iwl_rate_get_lowest_plcp(priv);
364
365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
366
367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
368                               &frame->u.cmd[0]);
369
370         iwl_free_frame(priv, frame);
371
372         return rc;
373 }
374
375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
376 {
377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
378
379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
380         if (sizeof(dma_addr_t) > sizeof(u32))
381                 addr |=
382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
383
384         return addr;
385 }
386
387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
388 {
389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
390
391         return le16_to_cpu(tb->hi_n_len) >> 4;
392 }
393
394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
395                                   dma_addr_t addr, u16 len)
396 {
397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
398         u16 hi_n_len = len << 4;
399
400         put_unaligned_le32(addr, &tb->lo);
401         if (sizeof(dma_addr_t) > sizeof(u32))
402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
403
404         tb->hi_n_len = cpu_to_le16(hi_n_len);
405
406         tfd->num_tbs = idx + 1;
407 }
408
409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
410 {
411         return tfd->num_tbs & 0x1f;
412 }
413
414 /**
415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
416  * @priv - driver private data
417  * @txq - tx queue
418  *
419  * Does NOT advance any TFD circular buffer read/write indexes
420  * Does NOT free the TFD itself (which is within circular buffer)
421  */
422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
423 {
424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
425         struct iwl_tfd *tfd;
426         struct pci_dev *dev = priv->pci_dev;
427         int index = txq->q.read_ptr;
428         int i;
429         int num_tbs;
430
431         tfd = &tfd_tmp[index];
432
433         /* Sanity check on number of chunks */
434         num_tbs = iwl_tfd_get_num_tbs(tfd);
435
436         if (num_tbs >= IWL_NUM_OF_TBS) {
437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
438                 /* @todo issue fatal error, it is quite serious situation */
439                 return;
440         }
441
442         /* Unmap tx_cmd */
443         if (num_tbs)
444                 pci_unmap_single(dev,
445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
447                                 PCI_DMA_BIDIRECTIONAL);
448
449         /* Unmap chunks, if any. */
450         for (i = 1; i < num_tbs; i++) {
451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
453
454                 if (txq->txb) {
455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
457                 }
458         }
459 }
460
461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
462                                  struct iwl_tx_queue *txq,
463                                  dma_addr_t addr, u16 len,
464                                  u8 reset, u8 pad)
465 {
466         struct iwl_queue *q;
467         struct iwl_tfd *tfd, *tfd_tmp;
468         u32 num_tbs;
469
470         q = &txq->q;
471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
472         tfd = &tfd_tmp[q->write_ptr];
473
474         if (reset)
475                 memset(tfd, 0, sizeof(*tfd));
476
477         num_tbs = iwl_tfd_get_num_tbs(tfd);
478
479         /* Each TFD can point to a maximum 20 Tx buffers */
480         if (num_tbs >= IWL_NUM_OF_TBS) {
481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
482                           IWL_NUM_OF_TBS);
483                 return -EINVAL;
484         }
485
486         BUG_ON(addr & ~DMA_BIT_MASK(36));
487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
488                 IWL_ERR(priv, "Unaligned address = %llx\n",
489                           (unsigned long long)addr);
490
491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
492
493         return 0;
494 }
495
496 /*
497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
498  * given Tx queue, and enable the DMA channel used for that queue.
499  *
500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
501  * channels supported in hardware.
502  */
503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
504                          struct iwl_tx_queue *txq)
505 {
506         int ret;
507         unsigned long flags;
508         int txq_id = txq->q.id;
509
510         spin_lock_irqsave(&priv->lock, flags);
511         ret = iwl_grab_nic_access(priv);
512         if (ret) {
513                 spin_unlock_irqrestore(&priv->lock, flags);
514                 return ret;
515         }
516
517         /* Circular buffer (TFD queue in DRAM) physical base address */
518         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
519                              txq->q.dma_addr >> 8);
520
521         iwl_release_nic_access(priv);
522         spin_unlock_irqrestore(&priv->lock, flags);
523
524         return 0;
525 }
526
527
528 /******************************************************************************
529  *
530  * Misc. internal state and helper functions
531  *
532  ******************************************************************************/
533
534 static void iwl_ht_conf(struct iwl_priv *priv,
535                             struct ieee80211_bss_conf *bss_conf)
536 {
537         struct ieee80211_sta_ht_cap *ht_conf;
538         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
539         struct ieee80211_sta *sta;
540
541         IWL_DEBUG_MAC80211(priv, "enter: \n");
542
543         if (!iwl_conf->is_ht)
544                 return;
545
546
547         /*
548          * It is totally wrong to base global information on something
549          * that is valid only when associated, alas, this driver works
550          * that way and I don't know how to fix it.
551          */
552
553         rcu_read_lock();
554         sta = ieee80211_find_sta(priv->hw, priv->bssid);
555         if (!sta) {
556                 rcu_read_unlock();
557                 return;
558         }
559         ht_conf = &sta->ht_cap;
560
561         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
562                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
563         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
564                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
565
566         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
567         iwl_conf->max_amsdu_size =
568                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
569
570         iwl_conf->supported_chan_width =
571                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
572
573         /*
574          * XXX: The HT configuration needs to be moved into iwl_mac_config()
575          *      to be done there correctly.
576          */
577
578         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
579         if (conf_is_ht40_minus(&priv->hw->conf))
580                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
581         else if (conf_is_ht40_plus(&priv->hw->conf))
582                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
583
584         /* If no above or below channel supplied disable FAT channel */
585         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
586             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
587                 iwl_conf->supported_chan_width = 0;
588
589         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
590
591         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
592
593         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
594         iwl_conf->ht_protection =
595                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
596         iwl_conf->non_GF_STA_present =
597                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
598
599         rcu_read_unlock();
600
601         IWL_DEBUG_MAC80211(priv, "leave\n");
602 }
603
604 #define MAX_UCODE_BEACON_INTERVAL       4096
605
606 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
607 {
608         u16 new_val = 0;
609         u16 beacon_factor = 0;
610
611         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
612                                         / MAX_UCODE_BEACON_INTERVAL;
613         new_val = beacon_val / beacon_factor;
614
615         if (!new_val)
616                 new_val = MAX_UCODE_BEACON_INTERVAL;
617
618         return new_val;
619 }
620
621 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
622 {
623         u64 tsf;
624         s32 interval_tm, rem;
625         unsigned long flags;
626         struct ieee80211_conf *conf = NULL;
627         u16 beacon_int = 0;
628
629         conf = ieee80211_get_hw_conf(priv->hw);
630
631         spin_lock_irqsave(&priv->lock, flags);
632         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
633         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
634
635         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
636                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
637                 priv->rxon_timing.atim_window = 0;
638         } else {
639                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
640
641                 /* TODO: we need to get atim_window from upper stack
642                  * for now we set to 0 */
643                 priv->rxon_timing.atim_window = 0;
644         }
645
646         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
647
648         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
649         interval_tm = beacon_int * 1024;
650         rem = do_div(tsf, interval_tm);
651         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
652
653         spin_unlock_irqrestore(&priv->lock, flags);
654         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
655                         le16_to_cpu(priv->rxon_timing.beacon_interval),
656                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
657                         le16_to_cpu(priv->rxon_timing.atim_window));
658 }
659
660 static int iwl_set_mode(struct iwl_priv *priv, int mode)
661 {
662         iwl_connection_init_rx_config(priv, mode);
663         iwl_set_rxon_chain(priv);
664         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
665
666         iwl_clear_stations_table(priv);
667
668         /* dont commit rxon if rf-kill is on*/
669         if (!iwl_is_ready_rf(priv))
670                 return -EAGAIN;
671
672         cancel_delayed_work(&priv->scan_check);
673         if (iwl_scan_cancel_timeout(priv, 100)) {
674                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
675                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
676                 return -EAGAIN;
677         }
678
679         iwl_commit_rxon(priv);
680
681         return 0;
682 }
683
684 /******************************************************************************
685  *
686  * Generic RX handler implementations
687  *
688  ******************************************************************************/
689 static void iwl_rx_reply_alive(struct iwl_priv *priv,
690                                 struct iwl_rx_mem_buffer *rxb)
691 {
692         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
693         struct iwl_alive_resp *palive;
694         struct delayed_work *pwork;
695
696         palive = &pkt->u.alive_frame;
697
698         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
699                        "0x%01X 0x%01X\n",
700                        palive->is_valid, palive->ver_type,
701                        palive->ver_subtype);
702
703         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
704                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
705                 memcpy(&priv->card_alive_init,
706                        &pkt->u.alive_frame,
707                        sizeof(struct iwl_init_alive_resp));
708                 pwork = &priv->init_alive_start;
709         } else {
710                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
711                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
712                        sizeof(struct iwl_alive_resp));
713                 pwork = &priv->alive_start;
714         }
715
716         /* We delay the ALIVE response by 5ms to
717          * give the HW RF Kill time to activate... */
718         if (palive->is_valid == UCODE_VALID_OK)
719                 queue_delayed_work(priv->workqueue, pwork,
720                                    msecs_to_jiffies(5));
721         else
722                 IWL_WARN(priv, "uCode did not respond OK.\n");
723 }
724
725 static void iwl_bg_beacon_update(struct work_struct *work)
726 {
727         struct iwl_priv *priv =
728                 container_of(work, struct iwl_priv, beacon_update);
729         struct sk_buff *beacon;
730
731         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
732         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
733
734         if (!beacon) {
735                 IWL_ERR(priv, "update beacon failed\n");
736                 return;
737         }
738
739         mutex_lock(&priv->mutex);
740         /* new beacon skb is allocated every time; dispose previous.*/
741         if (priv->ibss_beacon)
742                 dev_kfree_skb(priv->ibss_beacon);
743
744         priv->ibss_beacon = beacon;
745         mutex_unlock(&priv->mutex);
746
747         iwl_send_beacon_cmd(priv);
748 }
749
750 /**
751  * iwl_bg_statistics_periodic - Timer callback to queue statistics
752  *
753  * This callback is provided in order to send a statistics request.
754  *
755  * This timer function is continually reset to execute within
756  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
757  * was received.  We need to ensure we receive the statistics in order
758  * to update the temperature used for calibrating the TXPOWER.
759  */
760 static void iwl_bg_statistics_periodic(unsigned long data)
761 {
762         struct iwl_priv *priv = (struct iwl_priv *)data;
763
764         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
765                 return;
766
767         /* dont send host command if rf-kill is on */
768         if (!iwl_is_ready_rf(priv))
769                 return;
770
771         iwl_send_statistics_request(priv, CMD_ASYNC);
772 }
773
774 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
775                                 struct iwl_rx_mem_buffer *rxb)
776 {
777 #ifdef CONFIG_IWLWIFI_DEBUG
778         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
779         struct iwl4965_beacon_notif *beacon =
780                 (struct iwl4965_beacon_notif *)pkt->u.raw;
781         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
782
783         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
784                 "tsf %d %d rate %d\n",
785                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
786                 beacon->beacon_notify_hdr.failure_frame,
787                 le32_to_cpu(beacon->ibss_mgr_status),
788                 le32_to_cpu(beacon->high_tsf),
789                 le32_to_cpu(beacon->low_tsf), rate);
790 #endif
791
792         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
793             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
794                 queue_work(priv->workqueue, &priv->beacon_update);
795 }
796
797 /* Handle notification from uCode that card's power state is changing
798  * due to software, hardware, or critical temperature RFKILL */
799 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
800                                     struct iwl_rx_mem_buffer *rxb)
801 {
802         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
803         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
804         unsigned long status = priv->status;
805
806         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
807                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
808                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
809
810         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
811                      RF_CARD_DISABLED)) {
812
813                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
814                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
815
816                 if (!iwl_grab_nic_access(priv)) {
817                         iwl_write_direct32(
818                                 priv, HBUS_TARG_MBX_C,
819                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
820
821                         iwl_release_nic_access(priv);
822                 }
823
824                 if (!(flags & RXON_CARD_DISABLED)) {
825                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
826                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
827                         if (!iwl_grab_nic_access(priv)) {
828                                 iwl_write_direct32(
829                                         priv, HBUS_TARG_MBX_C,
830                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
831
832                                 iwl_release_nic_access(priv);
833                         }
834                 }
835
836                 if (flags & RF_CARD_DISABLED) {
837                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
838                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
839                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
840                         if (!iwl_grab_nic_access(priv))
841                                 iwl_release_nic_access(priv);
842                 }
843         }
844
845         if (flags & HW_CARD_DISABLED)
846                 set_bit(STATUS_RF_KILL_HW, &priv->status);
847         else
848                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
849
850
851         if (flags & SW_CARD_DISABLED)
852                 set_bit(STATUS_RF_KILL_SW, &priv->status);
853         else
854                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
855
856         if (!(flags & RXON_CARD_DISABLED))
857                 iwl_scan_cancel(priv);
858
859         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
860              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
861             (test_bit(STATUS_RF_KILL_SW, &status) !=
862              test_bit(STATUS_RF_KILL_SW, &priv->status)))
863                 queue_work(priv->workqueue, &priv->rf_kill);
864         else
865                 wake_up_interruptible(&priv->wait_command_queue);
866 }
867
868 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
869 {
870         int ret;
871         unsigned long flags;
872
873         spin_lock_irqsave(&priv->lock, flags);
874         ret = iwl_grab_nic_access(priv);
875         if (ret)
876                 goto err;
877
878         if (src == IWL_PWR_SRC_VAUX) {
879                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
880                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
881                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
882                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
883         } else {
884                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
885                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
886                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
887         }
888
889         iwl_release_nic_access(priv);
890 err:
891         spin_unlock_irqrestore(&priv->lock, flags);
892         return ret;
893 }
894
895 /**
896  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
897  *
898  * Setup the RX handlers for each of the reply types sent from the uCode
899  * to the host.
900  *
901  * This function chains into the hardware specific files for them to setup
902  * any hardware specific handlers as well.
903  */
904 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
905 {
906         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
907         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
908         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
909         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
910         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
911             iwl_rx_pm_debug_statistics_notif;
912         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
913
914         /*
915          * The same handler is used for both the REPLY to a discrete
916          * statistics request from the host as well as for the periodic
917          * statistics notifications (after received beacons) from the uCode.
918          */
919         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
920         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
921
922         iwl_setup_spectrum_handlers(priv);
923         iwl_setup_rx_scan_handlers(priv);
924
925         /* status change handler */
926         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
927
928         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
929             iwl_rx_missed_beacon_notif;
930         /* Rx handlers */
931         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
932         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
933         /* block ack */
934         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
935         /* Set up hardware specific Rx handlers */
936         priv->cfg->ops->lib->rx_handler_setup(priv);
937 }
938
939 /**
940  * iwl_rx_handle - Main entry function for receiving responses from uCode
941  *
942  * Uses the priv->rx_handlers callback function array to invoke
943  * the appropriate handlers, including command responses,
944  * frame-received notifications, and other notifications.
945  */
946 void iwl_rx_handle(struct iwl_priv *priv)
947 {
948         struct iwl_rx_mem_buffer *rxb;
949         struct iwl_rx_packet *pkt;
950         struct iwl_rx_queue *rxq = &priv->rxq;
951         u32 r, i;
952         int reclaim;
953         unsigned long flags;
954         u8 fill_rx = 0;
955         u32 count = 8;
956
957         /* uCode's read index (stored in shared DRAM) indicates the last Rx
958          * buffer that the driver may process (last buffer filled by ucode). */
959         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
960         i = rxq->read;
961
962         /* Rx interrupt, but nothing sent from uCode */
963         if (i == r)
964                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
965
966         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
967                 fill_rx = 1;
968
969         while (i != r) {
970                 rxb = rxq->queue[i];
971
972                 /* If an RXB doesn't have a Rx queue slot associated with it,
973                  * then a bug has been introduced in the queue refilling
974                  * routines -- catch it here */
975                 BUG_ON(rxb == NULL);
976
977                 rxq->queue[i] = NULL;
978
979                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
980                                  priv->hw_params.rx_buf_size + 256,
981                                  PCI_DMA_FROMDEVICE);
982                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
983
984                 /* Reclaim a command buffer only if this packet is a response
985                  *   to a (driver-originated) command.
986                  * If the packet (e.g. Rx frame) originated from uCode,
987                  *   there is no command buffer to reclaim.
988                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
989                  *   but apparently a few don't get set; catch them here. */
990                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
991                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
992                         (pkt->hdr.cmd != REPLY_RX) &&
993                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
994                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
995                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
996                         (pkt->hdr.cmd != REPLY_TX);
997
998                 /* Based on type of command response or notification,
999                  *   handle those that need handling via function in
1000                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1001                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1002                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1003                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1004                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1005                 } else {
1006                         /* No handling needed */
1007                         IWL_DEBUG_RX(priv,
1008                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1009                                 r, i, get_cmd_string(pkt->hdr.cmd),
1010                                 pkt->hdr.cmd);
1011                 }
1012
1013                 if (reclaim) {
1014                         /* Invoke any callbacks, transfer the skb to caller, and
1015                          * fire off the (possibly) blocking iwl_send_cmd()
1016                          * as we reclaim the driver command queue */
1017                         if (rxb && rxb->skb)
1018                                 iwl_tx_cmd_complete(priv, rxb);
1019                         else
1020                                 IWL_WARN(priv, "Claim null rxb?\n");
1021                 }
1022
1023                 /* For now we just don't re-use anything.  We can tweak this
1024                  * later to try and re-use notification packets and SKBs that
1025                  * fail to Rx correctly */
1026                 if (rxb->skb != NULL) {
1027                         priv->alloc_rxb_skb--;
1028                         dev_kfree_skb_any(rxb->skb);
1029                         rxb->skb = NULL;
1030                 }
1031
1032                 spin_lock_irqsave(&rxq->lock, flags);
1033                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1034                 spin_unlock_irqrestore(&rxq->lock, flags);
1035                 i = (i + 1) & RX_QUEUE_MASK;
1036                 /* If there are a lot of unused frames,
1037                  * restock the Rx queue so ucode wont assert. */
1038                 if (fill_rx) {
1039                         count++;
1040                         if (count >= 8) {
1041                                 priv->rxq.read = i;
1042                                 iwl_rx_queue_restock(priv);
1043                                 count = 0;
1044                         }
1045                 }
1046         }
1047
1048         /* Backtrack one entry */
1049         priv->rxq.read = i;
1050         iwl_rx_queue_restock(priv);
1051 }
1052
1053 /* call this function to flush any scheduled tasklet */
1054 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1055 {
1056         /* wait to make sure we flush pending tasklet*/
1057         synchronize_irq(priv->pci_dev->irq);
1058         tasklet_kill(&priv->irq_tasklet);
1059 }
1060
1061 static void iwl_error_recovery(struct iwl_priv *priv)
1062 {
1063         unsigned long flags;
1064
1065         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1066                sizeof(priv->staging_rxon));
1067         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1068         iwl_commit_rxon(priv);
1069
1070         iwl_rxon_add_station(priv, priv->bssid, 1);
1071
1072         spin_lock_irqsave(&priv->lock, flags);
1073         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1074         priv->error_recovering = 0;
1075         spin_unlock_irqrestore(&priv->lock, flags);
1076 }
1077
1078 static void iwl_irq_tasklet(struct iwl_priv *priv)
1079 {
1080         u32 inta, handled = 0;
1081         u32 inta_fh;
1082         unsigned long flags;
1083 #ifdef CONFIG_IWLWIFI_DEBUG
1084         u32 inta_mask;
1085 #endif
1086
1087         spin_lock_irqsave(&priv->lock, flags);
1088
1089         /* Ack/clear/reset pending uCode interrupts.
1090          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1091          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1092         inta = iwl_read32(priv, CSR_INT);
1093         iwl_write32(priv, CSR_INT, inta);
1094
1095         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1096          * Any new interrupts that happen after this, either while we're
1097          * in this tasklet, or later, will show up in next ISR/tasklet. */
1098         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1099         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1100
1101 #ifdef CONFIG_IWLWIFI_DEBUG
1102         if (priv->debug_level & IWL_DL_ISR) {
1103                 /* just for debug */
1104                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1105                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1106                               inta, inta_mask, inta_fh);
1107         }
1108 #endif
1109
1110         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1111          * atomic, make sure that inta covers all the interrupts that
1112          * we've discovered, even if FH interrupt came in just after
1113          * reading CSR_INT. */
1114         if (inta_fh & CSR49_FH_INT_RX_MASK)
1115                 inta |= CSR_INT_BIT_FH_RX;
1116         if (inta_fh & CSR49_FH_INT_TX_MASK)
1117                 inta |= CSR_INT_BIT_FH_TX;
1118
1119         /* Now service all interrupt bits discovered above. */
1120         if (inta & CSR_INT_BIT_HW_ERR) {
1121                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1122
1123                 /* Tell the device to stop sending interrupts */
1124                 iwl_disable_interrupts(priv);
1125
1126                 iwl_irq_handle_error(priv);
1127
1128                 handled |= CSR_INT_BIT_HW_ERR;
1129
1130                 spin_unlock_irqrestore(&priv->lock, flags);
1131
1132                 return;
1133         }
1134
1135 #ifdef CONFIG_IWLWIFI_DEBUG
1136         if (priv->debug_level & (IWL_DL_ISR)) {
1137                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1138                 if (inta & CSR_INT_BIT_SCD)
1139                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1140                                       "the frame/frames.\n");
1141
1142                 /* Alive notification via Rx interrupt will do the real work */
1143                 if (inta & CSR_INT_BIT_ALIVE)
1144                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1145         }
1146 #endif
1147         /* Safely ignore these bits for debug checks below */
1148         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1149
1150         /* HW RF KILL switch toggled */
1151         if (inta & CSR_INT_BIT_RF_KILL) {
1152                 int hw_rf_kill = 0;
1153                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1154                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1155                         hw_rf_kill = 1;
1156
1157                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1158                                 hw_rf_kill ? "disable radio" : "enable radio");
1159
1160                 /* driver only loads ucode once setting the interface up.
1161                  * the driver allows loading the ucode even if the radio
1162                  * is killed. Hence update the killswitch state here. The
1163                  * rfkill handler will care about restarting if needed.
1164                  */
1165                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1166                         if (hw_rf_kill)
1167                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1168                         else
1169                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1170                         queue_work(priv->workqueue, &priv->rf_kill);
1171                 }
1172
1173                 handled |= CSR_INT_BIT_RF_KILL;
1174         }
1175
1176         /* Chip got too hot and stopped itself */
1177         if (inta & CSR_INT_BIT_CT_KILL) {
1178                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1179                 handled |= CSR_INT_BIT_CT_KILL;
1180         }
1181
1182         /* Error detected by uCode */
1183         if (inta & CSR_INT_BIT_SW_ERR) {
1184                 IWL_ERR(priv, "Microcode SW error detected. "
1185                         " Restarting 0x%X.\n", inta);
1186                 iwl_irq_handle_error(priv);
1187                 handled |= CSR_INT_BIT_SW_ERR;
1188         }
1189
1190         /* uCode wakes up after power-down sleep */
1191         if (inta & CSR_INT_BIT_WAKEUP) {
1192                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1193                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1194                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1195                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1196                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1197                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1198                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1199                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1200
1201                 handled |= CSR_INT_BIT_WAKEUP;
1202         }
1203
1204         /* All uCode command responses, including Tx command responses,
1205          * Rx "responses" (frame-received notification), and other
1206          * notifications from uCode come through here*/
1207         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1208                 iwl_rx_handle(priv);
1209                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1210         }
1211
1212         if (inta & CSR_INT_BIT_FH_TX) {
1213                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1214                 handled |= CSR_INT_BIT_FH_TX;
1215                 /* FH finished to write, send event */
1216                 priv->ucode_write_complete = 1;
1217                 wake_up_interruptible(&priv->wait_command_queue);
1218         }
1219
1220         if (inta & ~handled)
1221                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1222
1223         if (inta & ~CSR_INI_SET_MASK) {
1224                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1225                          inta & ~CSR_INI_SET_MASK);
1226                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1227         }
1228
1229         /* Re-enable all interrupts */
1230         /* only Re-enable if diabled by irq */
1231         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1232                 iwl_enable_interrupts(priv);
1233
1234 #ifdef CONFIG_IWLWIFI_DEBUG
1235         if (priv->debug_level & (IWL_DL_ISR)) {
1236                 inta = iwl_read32(priv, CSR_INT);
1237                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1238                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1239                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1240                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1241         }
1242 #endif
1243         spin_unlock_irqrestore(&priv->lock, flags);
1244 }
1245
1246 /******************************************************************************
1247  *
1248  * uCode download functions
1249  *
1250  ******************************************************************************/
1251
1252 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1253 {
1254         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1255         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1256         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1257         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1258         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1259         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1260 }
1261
1262 static void iwl_nic_start(struct iwl_priv *priv)
1263 {
1264         /* Remove all resets to allow NIC to operate */
1265         iwl_write32(priv, CSR_RESET, 0);
1266 }
1267
1268
1269 /**
1270  * iwl_read_ucode - Read uCode images from disk file.
1271  *
1272  * Copy into buffers for card to fetch via bus-mastering
1273  */
1274 static int iwl_read_ucode(struct iwl_priv *priv)
1275 {
1276         struct iwl_ucode *ucode;
1277         int ret = -EINVAL, index;
1278         const struct firmware *ucode_raw;
1279         const char *name_pre = priv->cfg->fw_name_pre;
1280         const unsigned int api_max = priv->cfg->ucode_api_max;
1281         const unsigned int api_min = priv->cfg->ucode_api_min;
1282         char buf[25];
1283         u8 *src;
1284         size_t len;
1285         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1286
1287         /* Ask kernel firmware_class module to get the boot firmware off disk.
1288          * request_firmware() is synchronous, file is in memory on return. */
1289         for (index = api_max; index >= api_min; index--) {
1290                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1291                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1292                 if (ret < 0) {
1293                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1294                                   buf, ret);
1295                         if (ret == -ENOENT)
1296                                 continue;
1297                         else
1298                                 goto error;
1299                 } else {
1300                         if (index < api_max)
1301                                 IWL_ERR(priv, "Loaded firmware %s, "
1302                                         "which is deprecated. "
1303                                         "Please use API v%u instead.\n",
1304                                           buf, api_max);
1305
1306                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1307                                        buf, ucode_raw->size);
1308                         break;
1309                 }
1310         }
1311
1312         if (ret < 0)
1313                 goto error;
1314
1315         /* Make sure that we got at least our header! */
1316         if (ucode_raw->size < sizeof(*ucode)) {
1317                 IWL_ERR(priv, "File size way too small!\n");
1318                 ret = -EINVAL;
1319                 goto err_release;
1320         }
1321
1322         /* Data from ucode file:  header followed by uCode images */
1323         ucode = (void *)ucode_raw->data;
1324
1325         priv->ucode_ver = le32_to_cpu(ucode->ver);
1326         api_ver = IWL_UCODE_API(priv->ucode_ver);
1327         inst_size = le32_to_cpu(ucode->inst_size);
1328         data_size = le32_to_cpu(ucode->data_size);
1329         init_size = le32_to_cpu(ucode->init_size);
1330         init_data_size = le32_to_cpu(ucode->init_data_size);
1331         boot_size = le32_to_cpu(ucode->boot_size);
1332
1333         /* api_ver should match the api version forming part of the
1334          * firmware filename ... but we don't check for that and only rely
1335          * on the API version read from firmware header from here on forward */
1336
1337         if (api_ver < api_min || api_ver > api_max) {
1338                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1339                           "Driver supports v%u, firmware is v%u.\n",
1340                           api_max, api_ver);
1341                 priv->ucode_ver = 0;
1342                 ret = -EINVAL;
1343                 goto err_release;
1344         }
1345         if (api_ver != api_max)
1346                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1347                           "got v%u. New firmware can be obtained "
1348                           "from http://www.intellinuxwireless.org.\n",
1349                           api_max, api_ver);
1350
1351         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1352                IWL_UCODE_MAJOR(priv->ucode_ver),
1353                IWL_UCODE_MINOR(priv->ucode_ver),
1354                IWL_UCODE_API(priv->ucode_ver),
1355                IWL_UCODE_SERIAL(priv->ucode_ver));
1356
1357         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1358                        priv->ucode_ver);
1359         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1360                        inst_size);
1361         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1362                        data_size);
1363         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1364                        init_size);
1365         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1366                        init_data_size);
1367         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1368                        boot_size);
1369
1370         /* Verify size of file vs. image size info in file's header */
1371         if (ucode_raw->size < sizeof(*ucode) +
1372                 inst_size + data_size + init_size +
1373                 init_data_size + boot_size) {
1374
1375                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1376                                (int)ucode_raw->size);
1377                 ret = -EINVAL;
1378                 goto err_release;
1379         }
1380
1381         /* Verify that uCode images will fit in card's SRAM */
1382         if (inst_size > priv->hw_params.max_inst_size) {
1383                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1384                                inst_size);
1385                 ret = -EINVAL;
1386                 goto err_release;
1387         }
1388
1389         if (data_size > priv->hw_params.max_data_size) {
1390                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1391                                 data_size);
1392                 ret = -EINVAL;
1393                 goto err_release;
1394         }
1395         if (init_size > priv->hw_params.max_inst_size) {
1396                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1397                         init_size);
1398                 ret = -EINVAL;
1399                 goto err_release;
1400         }
1401         if (init_data_size > priv->hw_params.max_data_size) {
1402                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1403                       init_data_size);
1404                 ret = -EINVAL;
1405                 goto err_release;
1406         }
1407         if (boot_size > priv->hw_params.max_bsm_size) {
1408                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1409                         boot_size);
1410                 ret = -EINVAL;
1411                 goto err_release;
1412         }
1413
1414         /* Allocate ucode buffers for card's bus-master loading ... */
1415
1416         /* Runtime instructions and 2 copies of data:
1417          * 1) unmodified from disk
1418          * 2) backup cache for save/restore during power-downs */
1419         priv->ucode_code.len = inst_size;
1420         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1421
1422         priv->ucode_data.len = data_size;
1423         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1424
1425         priv->ucode_data_backup.len = data_size;
1426         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1427
1428         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1429             !priv->ucode_data_backup.v_addr)
1430                 goto err_pci_alloc;
1431
1432         /* Initialization instructions and data */
1433         if (init_size && init_data_size) {
1434                 priv->ucode_init.len = init_size;
1435                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1436
1437                 priv->ucode_init_data.len = init_data_size;
1438                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1439
1440                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1441                         goto err_pci_alloc;
1442         }
1443
1444         /* Bootstrap (instructions only, no data) */
1445         if (boot_size) {
1446                 priv->ucode_boot.len = boot_size;
1447                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1448
1449                 if (!priv->ucode_boot.v_addr)
1450                         goto err_pci_alloc;
1451         }
1452
1453         /* Copy images into buffers for card's bus-master reads ... */
1454
1455         /* Runtime instructions (first block of data in file) */
1456         src = &ucode->data[0];
1457         len = priv->ucode_code.len;
1458         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1459         memcpy(priv->ucode_code.v_addr, src, len);
1460         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1461                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1462
1463         /* Runtime data (2nd block)
1464          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1465         src = &ucode->data[inst_size];
1466         len = priv->ucode_data.len;
1467         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1468         memcpy(priv->ucode_data.v_addr, src, len);
1469         memcpy(priv->ucode_data_backup.v_addr, src, len);
1470
1471         /* Initialization instructions (3rd block) */
1472         if (init_size) {
1473                 src = &ucode->data[inst_size + data_size];
1474                 len = priv->ucode_init.len;
1475                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1476                                 len);
1477                 memcpy(priv->ucode_init.v_addr, src, len);
1478         }
1479
1480         /* Initialization data (4th block) */
1481         if (init_data_size) {
1482                 src = &ucode->data[inst_size + data_size + init_size];
1483                 len = priv->ucode_init_data.len;
1484                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1485                                len);
1486                 memcpy(priv->ucode_init_data.v_addr, src, len);
1487         }
1488
1489         /* Bootstrap instructions (5th block) */
1490         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1491         len = priv->ucode_boot.len;
1492         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1493         memcpy(priv->ucode_boot.v_addr, src, len);
1494
1495         /* We have our copies now, allow OS release its copies */
1496         release_firmware(ucode_raw);
1497         return 0;
1498
1499  err_pci_alloc:
1500         IWL_ERR(priv, "failed to allocate pci memory\n");
1501         ret = -ENOMEM;
1502         iwl_dealloc_ucode_pci(priv);
1503
1504  err_release:
1505         release_firmware(ucode_raw);
1506
1507  error:
1508         return ret;
1509 }
1510
1511 /* temporary */
1512 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1513                                  struct sk_buff *skb);
1514
1515 /**
1516  * iwl_alive_start - called after REPLY_ALIVE notification received
1517  *                   from protocol/runtime uCode (initialization uCode's
1518  *                   Alive gets handled by iwl_init_alive_start()).
1519  */
1520 static void iwl_alive_start(struct iwl_priv *priv)
1521 {
1522         int ret = 0;
1523
1524         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1525
1526         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1527                 /* We had an error bringing up the hardware, so take it
1528                  * all the way back down so we can try again */
1529                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1530                 goto restart;
1531         }
1532
1533         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1534          * This is a paranoid check, because we would not have gotten the
1535          * "runtime" alive if code weren't properly loaded.  */
1536         if (iwl_verify_ucode(priv)) {
1537                 /* Runtime instruction load was bad;
1538                  * take it all the way back down so we can try again */
1539                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1540                 goto restart;
1541         }
1542
1543         iwl_clear_stations_table(priv);
1544         ret = priv->cfg->ops->lib->alive_notify(priv);
1545         if (ret) {
1546                 IWL_WARN(priv,
1547                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1548                 goto restart;
1549         }
1550
1551         /* After the ALIVE response, we can send host commands to the uCode */
1552         set_bit(STATUS_ALIVE, &priv->status);
1553
1554         if (iwl_is_rfkill(priv))
1555                 return;
1556
1557         ieee80211_wake_queues(priv->hw);
1558
1559         priv->active_rate = priv->rates_mask;
1560         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1561
1562         if (iwl_is_associated(priv)) {
1563                 struct iwl_rxon_cmd *active_rxon =
1564                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1565                 /* apply any changes in staging */
1566                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1567                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1568         } else {
1569                 /* Initialize our rx_config data */
1570                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1571                 iwl_set_rxon_chain(priv);
1572                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1573         }
1574
1575         /* Configure Bluetooth device coexistence support */
1576         iwl_send_bt_config(priv);
1577
1578         iwl_reset_run_time_calib(priv);
1579
1580         /* Configure the adapter for unassociated operation */
1581         iwl_commit_rxon(priv);
1582
1583         /* At this point, the NIC is initialized and operational */
1584         iwl_rf_kill_ct_config(priv);
1585
1586         iwl_leds_register(priv);
1587
1588         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1589         set_bit(STATUS_READY, &priv->status);
1590         wake_up_interruptible(&priv->wait_command_queue);
1591
1592         if (priv->error_recovering)
1593                 iwl_error_recovery(priv);
1594
1595         iwl_power_update_mode(priv, 1);
1596
1597         /* reassociate for ADHOC mode */
1598         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1599                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1600                                                                 priv->vif);
1601                 if (beacon)
1602                         iwl_mac_beacon_update(priv->hw, beacon);
1603         }
1604
1605
1606         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1607                 iwl_set_mode(priv, priv->iw_mode);
1608
1609         return;
1610
1611  restart:
1612         queue_work(priv->workqueue, &priv->restart);
1613 }
1614
1615 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1616
1617 static void __iwl_down(struct iwl_priv *priv)
1618 {
1619         unsigned long flags;
1620         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1621
1622         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1623
1624         if (!exit_pending)
1625                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1626
1627         iwl_leds_unregister(priv);
1628
1629         iwl_clear_stations_table(priv);
1630
1631         /* Unblock any waiting calls */
1632         wake_up_interruptible_all(&priv->wait_command_queue);
1633
1634         /* Wipe out the EXIT_PENDING status bit if we are not actually
1635          * exiting the module */
1636         if (!exit_pending)
1637                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1638
1639         /* stop and reset the on-board processor */
1640         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1641
1642         /* tell the device to stop sending interrupts */
1643         spin_lock_irqsave(&priv->lock, flags);
1644         iwl_disable_interrupts(priv);
1645         spin_unlock_irqrestore(&priv->lock, flags);
1646         iwl_synchronize_irq(priv);
1647
1648         if (priv->mac80211_registered)
1649                 ieee80211_stop_queues(priv->hw);
1650
1651         /* If we have not previously called iwl_init() then
1652          * clear all bits but the RF Kill and SUSPEND bits and return */
1653         if (!iwl_is_init(priv)) {
1654                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1655                                         STATUS_RF_KILL_HW |
1656                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1657                                         STATUS_RF_KILL_SW |
1658                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1659                                         STATUS_GEO_CONFIGURED |
1660                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1661                                         STATUS_IN_SUSPEND |
1662                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1663                                         STATUS_EXIT_PENDING;
1664                 goto exit;
1665         }
1666
1667         /* ...otherwise clear out all the status bits but the RF Kill and
1668          * SUSPEND bits and continue taking the NIC down. */
1669         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1670                                 STATUS_RF_KILL_HW |
1671                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1672                                 STATUS_RF_KILL_SW |
1673                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1674                                 STATUS_GEO_CONFIGURED |
1675                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1676                                 STATUS_IN_SUSPEND |
1677                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1678                                 STATUS_FW_ERROR |
1679                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1680                                 STATUS_EXIT_PENDING;
1681
1682         spin_lock_irqsave(&priv->lock, flags);
1683         iwl_clear_bit(priv, CSR_GP_CNTRL,
1684                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1685         spin_unlock_irqrestore(&priv->lock, flags);
1686
1687         iwl_txq_ctx_stop(priv);
1688         iwl_rxq_stop(priv);
1689
1690         spin_lock_irqsave(&priv->lock, flags);
1691         if (!iwl_grab_nic_access(priv)) {
1692                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1693                                          APMG_CLK_VAL_DMA_CLK_RQT);
1694                 iwl_release_nic_access(priv);
1695         }
1696         spin_unlock_irqrestore(&priv->lock, flags);
1697
1698         udelay(5);
1699
1700         /* FIXME: apm_ops.suspend(priv) */
1701         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1702                 priv->cfg->ops->lib->apm_ops.stop(priv);
1703         else
1704                 priv->cfg->ops->lib->apm_ops.reset(priv);
1705  exit:
1706         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1707
1708         if (priv->ibss_beacon)
1709                 dev_kfree_skb(priv->ibss_beacon);
1710         priv->ibss_beacon = NULL;
1711
1712         /* clear out any free frames */
1713         iwl_clear_free_frames(priv);
1714 }
1715
1716 static void iwl_down(struct iwl_priv *priv)
1717 {
1718         mutex_lock(&priv->mutex);
1719         __iwl_down(priv);
1720         mutex_unlock(&priv->mutex);
1721
1722         iwl_cancel_deferred_work(priv);
1723 }
1724
1725 #define MAX_HW_RESTARTS 5
1726
1727 static int __iwl_up(struct iwl_priv *priv)
1728 {
1729         int i;
1730         int ret;
1731
1732         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1733                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1734                 return -EIO;
1735         }
1736
1737         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1738                 IWL_ERR(priv, "ucode not available for device bringup\n");
1739                 return -EIO;
1740         }
1741
1742         /* If platform's RF_KILL switch is NOT set to KILL */
1743         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1744                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1745         else
1746                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1747
1748         if (iwl_is_rfkill(priv)) {
1749                 iwl_enable_interrupts(priv);
1750                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1751                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1752                 return 0;
1753         }
1754
1755         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1756
1757         ret = iwl_hw_nic_init(priv);
1758         if (ret) {
1759                 IWL_ERR(priv, "Unable to init nic\n");
1760                 return ret;
1761         }
1762
1763         /* make sure rfkill handshake bits are cleared */
1764         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1765         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1766                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1767
1768         /* clear (again), then enable host interrupts */
1769         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1770         iwl_enable_interrupts(priv);
1771
1772         /* really make sure rfkill handshake bits are cleared */
1773         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1774         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1775
1776         /* Copy original ucode data image from disk into backup cache.
1777          * This will be used to initialize the on-board processor's
1778          * data SRAM for a clean start when the runtime program first loads. */
1779         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1780                priv->ucode_data.len);
1781
1782         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1783
1784                 iwl_clear_stations_table(priv);
1785
1786                 /* load bootstrap state machine,
1787                  * load bootstrap program into processor's memory,
1788                  * prepare to load the "initialize" uCode */
1789                 ret = priv->cfg->ops->lib->load_ucode(priv);
1790
1791                 if (ret) {
1792                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1793                                 ret);
1794                         continue;
1795                 }
1796
1797                 /* Clear out the uCode error bit if it is set */
1798                 clear_bit(STATUS_FW_ERROR, &priv->status);
1799
1800                 /* start card; "initialize" will load runtime ucode */
1801                 iwl_nic_start(priv);
1802
1803                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1804
1805                 return 0;
1806         }
1807
1808         set_bit(STATUS_EXIT_PENDING, &priv->status);
1809         __iwl_down(priv);
1810         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1811
1812         /* tried to restart and config the device for as long as our
1813          * patience could withstand */
1814         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1815         return -EIO;
1816 }
1817
1818
1819 /*****************************************************************************
1820  *
1821  * Workqueue callbacks
1822  *
1823  *****************************************************************************/
1824
1825 static void iwl_bg_init_alive_start(struct work_struct *data)
1826 {
1827         struct iwl_priv *priv =
1828             container_of(data, struct iwl_priv, init_alive_start.work);
1829
1830         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1831                 return;
1832
1833         mutex_lock(&priv->mutex);
1834         priv->cfg->ops->lib->init_alive_start(priv);
1835         mutex_unlock(&priv->mutex);
1836 }
1837
1838 static void iwl_bg_alive_start(struct work_struct *data)
1839 {
1840         struct iwl_priv *priv =
1841             container_of(data, struct iwl_priv, alive_start.work);
1842
1843         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1844                 return;
1845
1846         mutex_lock(&priv->mutex);
1847         iwl_alive_start(priv);
1848         mutex_unlock(&priv->mutex);
1849 }
1850
1851 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1852 {
1853         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1854                         run_time_calib_work);
1855
1856         mutex_lock(&priv->mutex);
1857
1858         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1859             test_bit(STATUS_SCANNING, &priv->status)) {
1860                 mutex_unlock(&priv->mutex);
1861                 return;
1862         }
1863
1864         if (priv->start_calib) {
1865                 iwl_chain_noise_calibration(priv, &priv->statistics);
1866
1867                 iwl_sensitivity_calibration(priv, &priv->statistics);
1868         }
1869
1870         mutex_unlock(&priv->mutex);
1871         return;
1872 }
1873
1874 static void iwl_bg_up(struct work_struct *data)
1875 {
1876         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1877
1878         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1879                 return;
1880
1881         mutex_lock(&priv->mutex);
1882         __iwl_up(priv);
1883         mutex_unlock(&priv->mutex);
1884         iwl_rfkill_set_hw_state(priv);
1885 }
1886
1887 static void iwl_bg_restart(struct work_struct *data)
1888 {
1889         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1890
1891         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1892                 return;
1893
1894         iwl_down(priv);
1895         queue_work(priv->workqueue, &priv->up);
1896 }
1897
1898 static void iwl_bg_rx_replenish(struct work_struct *data)
1899 {
1900         struct iwl_priv *priv =
1901             container_of(data, struct iwl_priv, rx_replenish);
1902
1903         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1904                 return;
1905
1906         mutex_lock(&priv->mutex);
1907         iwl_rx_replenish(priv);
1908         mutex_unlock(&priv->mutex);
1909 }
1910
1911 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1912
1913 static void iwl_post_associate(struct iwl_priv *priv)
1914 {
1915         struct ieee80211_conf *conf = NULL;
1916         int ret = 0;
1917         unsigned long flags;
1918
1919         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1920                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1921                 return;
1922         }
1923
1924         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1925                         priv->assoc_id, priv->active_rxon.bssid_addr);
1926
1927
1928         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1929                 return;
1930
1931
1932         if (!priv->vif || !priv->is_open)
1933                 return;
1934
1935         iwl_power_cancel_timeout(priv);
1936         iwl_scan_cancel_timeout(priv, 200);
1937
1938         conf = ieee80211_get_hw_conf(priv->hw);
1939
1940         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1941         iwl_commit_rxon(priv);
1942
1943         iwl_setup_rxon_timing(priv);
1944         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1945                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1946         if (ret)
1947                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1948                             "Attempting to continue.\n");
1949
1950         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1951
1952         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1953
1954         iwl_set_rxon_chain(priv);
1955         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1956
1957         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1958                         priv->assoc_id, priv->beacon_int);
1959
1960         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1961                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1962         else
1963                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1964
1965         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1966                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1967                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1968                 else
1969                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1970
1971                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1972                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1973
1974         }
1975
1976         iwl_commit_rxon(priv);
1977
1978         switch (priv->iw_mode) {
1979         case NL80211_IFTYPE_STATION:
1980                 break;
1981
1982         case NL80211_IFTYPE_ADHOC:
1983
1984                 /* assume default assoc id */
1985                 priv->assoc_id = 1;
1986
1987                 iwl_rxon_add_station(priv, priv->bssid, 0);
1988                 iwl_send_beacon_cmd(priv);
1989
1990                 break;
1991
1992         default:
1993                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1994                           __func__, priv->iw_mode);
1995                 break;
1996         }
1997
1998         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1999                 priv->assoc_station_added = 1;
2000
2001         spin_lock_irqsave(&priv->lock, flags);
2002         iwl_activate_qos(priv, 0);
2003         spin_unlock_irqrestore(&priv->lock, flags);
2004
2005         /* the chain noise calibration will enabled PM upon completion
2006          * If chain noise has already been run, then we need to enable
2007          * power management here */
2008         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2009                 iwl_power_enable_management(priv);
2010
2011         /* Enable Rx differential gain and sensitivity calibrations */
2012         iwl_chain_noise_reset(priv);
2013         priv->start_calib = 1;
2014
2015 }
2016
2017 /*****************************************************************************
2018  *
2019  * mac80211 entry point functions
2020  *
2021  *****************************************************************************/
2022
2023 #define UCODE_READY_TIMEOUT     (4 * HZ)
2024
2025 static int iwl_mac_start(struct ieee80211_hw *hw)
2026 {
2027         struct iwl_priv *priv = hw->priv;
2028         int ret;
2029
2030         IWL_DEBUG_MAC80211(priv, "enter\n");
2031
2032         /* we should be verifying the device is ready to be opened */
2033         mutex_lock(&priv->mutex);
2034
2035         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2036         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2037          * ucode filename and max sizes are card-specific. */
2038
2039         if (!priv->ucode_code.len) {
2040                 ret = iwl_read_ucode(priv);
2041                 if (ret) {
2042                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2043                         mutex_unlock(&priv->mutex);
2044                         return ret;
2045                 }
2046         }
2047
2048         ret = __iwl_up(priv);
2049
2050         mutex_unlock(&priv->mutex);
2051
2052         iwl_rfkill_set_hw_state(priv);
2053
2054         if (ret)
2055                 return ret;
2056
2057         if (iwl_is_rfkill(priv))
2058                 goto out;
2059
2060         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2061
2062         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2063                 return 0;
2064
2065         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2066          * mac80211 will not be run successfully. */
2067         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2068                         test_bit(STATUS_READY, &priv->status),
2069                         UCODE_READY_TIMEOUT);
2070         if (!ret) {
2071                 if (!test_bit(STATUS_READY, &priv->status)) {
2072                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2073                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2074                         return -ETIMEDOUT;
2075                 }
2076         }
2077
2078 out:
2079         priv->is_open = 1;
2080         IWL_DEBUG_MAC80211(priv, "leave\n");
2081         return 0;
2082 }
2083
2084 static void iwl_mac_stop(struct ieee80211_hw *hw)
2085 {
2086         struct iwl_priv *priv = hw->priv;
2087
2088         IWL_DEBUG_MAC80211(priv, "enter\n");
2089
2090         if (!priv->is_open) {
2091                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2092                 return;
2093         }
2094
2095         priv->is_open = 0;
2096
2097         if (iwl_is_ready_rf(priv)) {
2098                 /* stop mac, cancel any scan request and clear
2099                  * RXON_FILTER_ASSOC_MSK BIT
2100                  */
2101                 mutex_lock(&priv->mutex);
2102                 iwl_scan_cancel_timeout(priv, 100);
2103                 mutex_unlock(&priv->mutex);
2104         }
2105
2106         iwl_down(priv);
2107
2108         flush_workqueue(priv->workqueue);
2109
2110         /* enable interrupts again in order to receive rfkill changes */
2111         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2112         iwl_enable_interrupts(priv);
2113
2114         IWL_DEBUG_MAC80211(priv, "leave\n");
2115 }
2116
2117 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2118 {
2119         struct iwl_priv *priv = hw->priv;
2120
2121         IWL_DEBUG_MACDUMP(priv, "enter\n");
2122
2123         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2124                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2125
2126         if (iwl_tx_skb(priv, skb))
2127                 dev_kfree_skb_any(skb);
2128
2129         IWL_DEBUG_MACDUMP(priv, "leave\n");
2130         return NETDEV_TX_OK;
2131 }
2132
2133 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2134                                  struct ieee80211_if_init_conf *conf)
2135 {
2136         struct iwl_priv *priv = hw->priv;
2137         unsigned long flags;
2138
2139         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2140
2141         if (priv->vif) {
2142                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2143                 return -EOPNOTSUPP;
2144         }
2145
2146         spin_lock_irqsave(&priv->lock, flags);
2147         priv->vif = conf->vif;
2148         priv->iw_mode = conf->type;
2149
2150         spin_unlock_irqrestore(&priv->lock, flags);
2151
2152         mutex_lock(&priv->mutex);
2153
2154         if (conf->mac_addr) {
2155                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2156                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2157         }
2158
2159         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2160                 /* we are not ready, will run again when ready */
2161                 set_bit(STATUS_MODE_PENDING, &priv->status);
2162
2163         mutex_unlock(&priv->mutex);
2164
2165         IWL_DEBUG_MAC80211(priv, "leave\n");
2166         return 0;
2167 }
2168
2169 /**
2170  * iwl_mac_config - mac80211 config callback
2171  *
2172  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2173  * be set inappropriately and the driver currently sets the hardware up to
2174  * use it whenever needed.
2175  */
2176 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2177 {
2178         struct iwl_priv *priv = hw->priv;
2179         const struct iwl_channel_info *ch_info;
2180         struct ieee80211_conf *conf = &hw->conf;
2181         unsigned long flags = 0;
2182         int ret = 0;
2183         u16 ch;
2184         int scan_active = 0;
2185
2186         mutex_lock(&priv->mutex);
2187         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2188                                         conf->channel->hw_value, changed);
2189
2190         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2191                         test_bit(STATUS_SCANNING, &priv->status))) {
2192                 scan_active = 1;
2193                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2194         }
2195
2196
2197         /* during scanning mac80211 will delay channel setting until
2198          * scan finish with changed = 0
2199          */
2200         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2201                 if (scan_active)
2202                         goto set_ch_out;
2203
2204                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2205                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2206                 if (!is_channel_valid(ch_info)) {
2207                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2208                         ret = -EINVAL;
2209                         goto set_ch_out;
2210                 }
2211
2212                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2213                         !is_channel_ibss(ch_info)) {
2214                         IWL_ERR(priv, "channel %d in band %d not "
2215                                 "IBSS channel\n",
2216                                 conf->channel->hw_value, conf->channel->band);
2217                         ret = -EINVAL;
2218                         goto set_ch_out;
2219                 }
2220
2221                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2222
2223                 spin_lock_irqsave(&priv->lock, flags);
2224
2225
2226                 /* if we are switching from ht to 2.4 clear flags
2227                  * from any ht related info since 2.4 does not
2228                  * support ht */
2229                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2230                         priv->staging_rxon.flags = 0;
2231
2232                 iwl_set_rxon_channel(priv, conf->channel);
2233
2234                 iwl_set_flags_for_band(priv, conf->channel->band);
2235                 spin_unlock_irqrestore(&priv->lock, flags);
2236  set_ch_out:
2237                 /* The list of supported rates and rate mask can be different
2238                  * for each band; since the band may have changed, reset
2239                  * the rate mask to what mac80211 lists */
2240                 iwl_set_rate(priv);
2241         }
2242
2243         if (changed & IEEE80211_CONF_CHANGE_PS) {
2244                 if (conf->flags & IEEE80211_CONF_PS)
2245                         ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2246                 else
2247                         ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2248                 if (ret)
2249                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2250
2251         }
2252
2253         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2254                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2255                         priv->tx_power_user_lmt, conf->power_level);
2256
2257                 iwl_set_tx_power(priv, conf->power_level, false);
2258         }
2259
2260         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2261         iwl_set_rxon_chain(priv);
2262
2263         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2264                 if (conf->radio_enabled &&
2265                         iwl_radio_kill_sw_enable_radio(priv)) {
2266                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2267                                                 "waiting for uCode\n");
2268                         goto out;
2269                 }
2270
2271                 if (!conf->radio_enabled)
2272                         iwl_radio_kill_sw_disable_radio(priv);
2273         }
2274
2275         if (!conf->radio_enabled) {
2276                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2277                 goto out;
2278         }
2279
2280         if (!iwl_is_ready(priv)) {
2281                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2282                 goto out;
2283         }
2284
2285         if (scan_active)
2286                 goto out;
2287
2288         if (memcmp(&priv->active_rxon,
2289                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2290                 iwl_commit_rxon(priv);
2291         else
2292                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2293
2294
2295 out:
2296         IWL_DEBUG_MAC80211(priv, "leave\n");
2297         mutex_unlock(&priv->mutex);
2298         return ret;
2299 }
2300
2301 static void iwl_config_ap(struct iwl_priv *priv)
2302 {
2303         int ret = 0;
2304         unsigned long flags;
2305
2306         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2307                 return;
2308
2309         /* The following should be done only at AP bring up */
2310         if (!iwl_is_associated(priv)) {
2311
2312                 /* RXON - unassoc (to set timing command) */
2313                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2314                 iwl_commit_rxon(priv);
2315
2316                 /* RXON Timing */
2317                 iwl_setup_rxon_timing(priv);
2318                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2319                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2320                 if (ret)
2321                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2322                                         "Attempting to continue.\n");
2323
2324                 iwl_set_rxon_chain(priv);
2325
2326                 /* FIXME: what should be the assoc_id for AP? */
2327                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2328                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2329                         priv->staging_rxon.flags |=
2330                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2331                 else
2332                         priv->staging_rxon.flags &=
2333                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2334
2335                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2336                         if (priv->assoc_capability &
2337                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2338                                 priv->staging_rxon.flags |=
2339                                         RXON_FLG_SHORT_SLOT_MSK;
2340                         else
2341                                 priv->staging_rxon.flags &=
2342                                         ~RXON_FLG_SHORT_SLOT_MSK;
2343
2344                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2345                                 priv->staging_rxon.flags &=
2346                                         ~RXON_FLG_SHORT_SLOT_MSK;
2347                 }
2348                 /* restore RXON assoc */
2349                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2350                 iwl_commit_rxon(priv);
2351                 spin_lock_irqsave(&priv->lock, flags);
2352                 iwl_activate_qos(priv, 1);
2353                 spin_unlock_irqrestore(&priv->lock, flags);
2354                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2355         }
2356         iwl_send_beacon_cmd(priv);
2357
2358         /* FIXME - we need to add code here to detect a totally new
2359          * configuration, reset the AP, unassoc, rxon timing, assoc,
2360          * clear sta table, add BCAST sta... */
2361 }
2362
2363
2364 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2365                                         struct ieee80211_vif *vif,
2366                                     struct ieee80211_if_conf *conf)
2367 {
2368         struct iwl_priv *priv = hw->priv;
2369         int rc;
2370
2371         if (conf == NULL)
2372                 return -EIO;
2373
2374         if (priv->vif != vif) {
2375                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2376                 return 0;
2377         }
2378
2379         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2380             conf->changed & IEEE80211_IFCC_BEACON) {
2381                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2382                 if (!beacon)
2383                         return -ENOMEM;
2384                 mutex_lock(&priv->mutex);
2385                 rc = iwl_mac_beacon_update(hw, beacon);
2386                 mutex_unlock(&priv->mutex);
2387                 if (rc)
2388                         return rc;
2389         }
2390
2391         if (!iwl_is_alive(priv))
2392                 return -EAGAIN;
2393
2394         mutex_lock(&priv->mutex);
2395
2396         if (conf->bssid)
2397                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2398
2399 /*
2400  * very dubious code was here; the probe filtering flag is never set:
2401  *
2402         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2403             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2404  */
2405
2406         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2407                 if (!conf->bssid) {
2408                         conf->bssid = priv->mac_addr;
2409                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2410                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2411                                            conf->bssid);
2412                 }
2413                 if (priv->ibss_beacon)
2414                         dev_kfree_skb(priv->ibss_beacon);
2415
2416                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2417         }
2418
2419         if (iwl_is_rfkill(priv))
2420                 goto done;
2421
2422         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2423             !is_multicast_ether_addr(conf->bssid)) {
2424                 /* If there is currently a HW scan going on in the background
2425                  * then we need to cancel it else the RXON below will fail. */
2426                 if (iwl_scan_cancel_timeout(priv, 100)) {
2427                         IWL_WARN(priv, "Aborted scan still in progress "
2428                                     "after 100ms\n");
2429                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2430                         mutex_unlock(&priv->mutex);
2431                         return -EAGAIN;
2432                 }
2433                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2434
2435                 /* TODO: Audit driver for usage of these members and see
2436                  * if mac80211 deprecates them (priv->bssid looks like it
2437                  * shouldn't be there, but I haven't scanned the IBSS code
2438                  * to verify) - jpk */
2439                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2440
2441                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2442                         iwl_config_ap(priv);
2443                 else {
2444                         rc = iwl_commit_rxon(priv);
2445                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2446                                 iwl_rxon_add_station(
2447                                         priv, priv->active_rxon.bssid_addr, 1);
2448                 }
2449
2450         } else {
2451                 iwl_scan_cancel_timeout(priv, 100);
2452                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2453                 iwl_commit_rxon(priv);
2454         }
2455
2456  done:
2457         IWL_DEBUG_MAC80211(priv, "leave\n");
2458         mutex_unlock(&priv->mutex);
2459
2460         return 0;
2461 }
2462
2463 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2464                                      struct ieee80211_if_init_conf *conf)
2465 {
2466         struct iwl_priv *priv = hw->priv;
2467
2468         IWL_DEBUG_MAC80211(priv, "enter\n");
2469
2470         mutex_lock(&priv->mutex);
2471
2472         if (iwl_is_ready_rf(priv)) {
2473                 iwl_scan_cancel_timeout(priv, 100);
2474                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2475                 iwl_commit_rxon(priv);
2476         }
2477         if (priv->vif == conf->vif) {
2478                 priv->vif = NULL;
2479                 memset(priv->bssid, 0, ETH_ALEN);
2480         }
2481         mutex_unlock(&priv->mutex);
2482
2483         IWL_DEBUG_MAC80211(priv, "leave\n");
2484
2485 }
2486
2487 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2488 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2489                                      struct ieee80211_vif *vif,
2490                                      struct ieee80211_bss_conf *bss_conf,
2491                                      u32 changes)
2492 {
2493         struct iwl_priv *priv = hw->priv;
2494
2495         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2496
2497         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2498                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2499                                    bss_conf->use_short_preamble);
2500                 if (bss_conf->use_short_preamble)
2501                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2502                 else
2503                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2504         }
2505
2506         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2507                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2508                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2509                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2510                 else
2511                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2512         }
2513
2514         if (changes & BSS_CHANGED_HT) {
2515                 iwl_ht_conf(priv, bss_conf);
2516                 iwl_set_rxon_chain(priv);
2517         }
2518
2519         if (changes & BSS_CHANGED_ASSOC) {
2520                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2521                 /* This should never happen as this function should
2522                  * never be called from interrupt context. */
2523                 if (WARN_ON_ONCE(in_interrupt()))
2524                         return;
2525                 if (bss_conf->assoc) {
2526                         priv->assoc_id = bss_conf->aid;
2527                         priv->beacon_int = bss_conf->beacon_int;
2528                         priv->power_data.dtim_period = bss_conf->dtim_period;
2529                         priv->timestamp = bss_conf->timestamp;
2530                         priv->assoc_capability = bss_conf->assoc_capability;
2531
2532                         /* we have just associated, don't start scan too early
2533                          * leave time for EAPOL exchange to complete
2534                          */
2535                         priv->next_scan_jiffies = jiffies +
2536                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2537                         mutex_lock(&priv->mutex);
2538                         iwl_post_associate(priv);
2539                         mutex_unlock(&priv->mutex);
2540                 } else {
2541                         priv->assoc_id = 0;
2542                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2543                 }
2544         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2545                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2546                         iwl_send_rxon_assoc(priv);
2547         }
2548
2549 }
2550
2551 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2552                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2553                         u32 iv32, u16 *phase1key)
2554 {
2555
2556         struct iwl_priv *priv = hw->priv;
2557         IWL_DEBUG_MAC80211(priv, "enter\n");
2558
2559         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2560
2561         IWL_DEBUG_MAC80211(priv, "leave\n");
2562 }
2563
2564 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2565                            struct ieee80211_vif *vif,
2566                            struct ieee80211_sta *sta,
2567                            struct ieee80211_key_conf *key)
2568 {
2569         struct iwl_priv *priv = hw->priv;
2570         const u8 *addr;
2571         int ret;
2572         u8 sta_id;
2573         bool is_default_wep_key = false;
2574
2575         IWL_DEBUG_MAC80211(priv, "enter\n");
2576
2577         if (priv->hw_params.sw_crypto) {
2578                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2579                 return -EOPNOTSUPP;
2580         }
2581         addr = sta ? sta->addr : iwl_bcast_addr;
2582         sta_id = iwl_find_station(priv, addr);
2583         if (sta_id == IWL_INVALID_STATION) {
2584                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2585                                    addr);
2586                 return -EINVAL;
2587
2588         }
2589
2590         mutex_lock(&priv->mutex);
2591         iwl_scan_cancel_timeout(priv, 100);
2592         mutex_unlock(&priv->mutex);
2593
2594         /* If we are getting WEP group key and we didn't receive any key mapping
2595          * so far, we are in legacy wep mode (group key only), otherwise we are
2596          * in 1X mode.
2597          * In legacy wep mode, we use another host command to the uCode */
2598         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2599                 priv->iw_mode != NL80211_IFTYPE_AP) {
2600                 if (cmd == SET_KEY)
2601                         is_default_wep_key = !priv->key_mapping_key;
2602                 else
2603                         is_default_wep_key =
2604                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2605         }
2606
2607         switch (cmd) {
2608         case SET_KEY:
2609                 if (is_default_wep_key)
2610                         ret = iwl_set_default_wep_key(priv, key);
2611                 else
2612                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2613
2614                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2615                 break;
2616         case DISABLE_KEY:
2617                 if (is_default_wep_key)
2618                         ret = iwl_remove_default_wep_key(priv, key);
2619                 else
2620                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2621
2622                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2623                 break;
2624         default:
2625                 ret = -EINVAL;
2626         }
2627
2628         IWL_DEBUG_MAC80211(priv, "leave\n");
2629
2630         return ret;
2631 }
2632
2633 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2634                            const struct ieee80211_tx_queue_params *params)
2635 {
2636         struct iwl_priv *priv = hw->priv;
2637         unsigned long flags;
2638         int q;
2639
2640         IWL_DEBUG_MAC80211(priv, "enter\n");
2641
2642         if (!iwl_is_ready_rf(priv)) {
2643                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2644                 return -EIO;
2645         }
2646
2647         if (queue >= AC_NUM) {
2648                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2649                 return 0;
2650         }
2651
2652         q = AC_NUM - 1 - queue;
2653
2654         spin_lock_irqsave(&priv->lock, flags);
2655
2656         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2657         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2658         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2659         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2660                         cpu_to_le16((params->txop * 32));
2661
2662         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2663         priv->qos_data.qos_active = 1;
2664
2665         if (priv->iw_mode == NL80211_IFTYPE_AP)
2666                 iwl_activate_qos(priv, 1);
2667         else if (priv->assoc_id && iwl_is_associated(priv))
2668                 iwl_activate_qos(priv, 0);
2669
2670         spin_unlock_irqrestore(&priv->lock, flags);
2671
2672         IWL_DEBUG_MAC80211(priv, "leave\n");
2673         return 0;
2674 }
2675
2676 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2677                              enum ieee80211_ampdu_mlme_action action,
2678                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2679 {
2680         struct iwl_priv *priv = hw->priv;
2681         int ret;
2682
2683         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2684                      sta->addr, tid);
2685
2686         if (!(priv->cfg->sku & IWL_SKU_N))
2687                 return -EACCES;
2688
2689         switch (action) {
2690         case IEEE80211_AMPDU_RX_START:
2691                 IWL_DEBUG_HT(priv, "start Rx\n");
2692                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2693         case IEEE80211_AMPDU_RX_STOP:
2694                 IWL_DEBUG_HT(priv, "stop Rx\n");
2695                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2696                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2697                         return 0;
2698                 else
2699                         return ret;
2700         case IEEE80211_AMPDU_TX_START:
2701                 IWL_DEBUG_HT(priv, "start Tx\n");
2702                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2703         case IEEE80211_AMPDU_TX_STOP:
2704                 IWL_DEBUG_HT(priv, "stop Tx\n");
2705                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2706                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2707                         return 0;
2708                 else
2709                         return ret;
2710         default:
2711                 IWL_DEBUG_HT(priv, "unknown\n");
2712                 return -EINVAL;
2713                 break;
2714         }
2715         return 0;
2716 }
2717
2718 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2719                                 struct ieee80211_tx_queue_stats *stats)
2720 {
2721         struct iwl_priv *priv = hw->priv;
2722         int i, avail;
2723         struct iwl_tx_queue *txq;
2724         struct iwl_queue *q;
2725         unsigned long flags;
2726
2727         IWL_DEBUG_MAC80211(priv, "enter\n");
2728
2729         if (!iwl_is_ready_rf(priv)) {
2730                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2731                 return -EIO;
2732         }
2733
2734         spin_lock_irqsave(&priv->lock, flags);
2735
2736         for (i = 0; i < AC_NUM; i++) {
2737                 txq = &priv->txq[i];
2738                 q = &txq->q;
2739                 avail = iwl_queue_space(q);
2740
2741                 stats[i].len = q->n_window - avail;
2742                 stats[i].limit = q->n_window - q->high_mark;
2743                 stats[i].count = q->n_window;
2744
2745         }
2746         spin_unlock_irqrestore(&priv->lock, flags);
2747
2748         IWL_DEBUG_MAC80211(priv, "leave\n");
2749
2750         return 0;
2751 }
2752
2753 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2754                              struct ieee80211_low_level_stats *stats)
2755 {
2756         struct iwl_priv *priv = hw->priv;
2757
2758         priv = hw->priv;
2759         IWL_DEBUG_MAC80211(priv, "enter\n");
2760         IWL_DEBUG_MAC80211(priv, "leave\n");
2761
2762         return 0;
2763 }
2764
2765 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2766 {
2767         struct iwl_priv *priv = hw->priv;
2768         unsigned long flags;
2769
2770         mutex_lock(&priv->mutex);
2771         IWL_DEBUG_MAC80211(priv, "enter\n");
2772
2773         spin_lock_irqsave(&priv->lock, flags);
2774         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2775         spin_unlock_irqrestore(&priv->lock, flags);
2776
2777         iwl_reset_qos(priv);
2778
2779         spin_lock_irqsave(&priv->lock, flags);
2780         priv->assoc_id = 0;
2781         priv->assoc_capability = 0;
2782         priv->assoc_station_added = 0;
2783
2784         /* new association get rid of ibss beacon skb */
2785         if (priv->ibss_beacon)
2786                 dev_kfree_skb(priv->ibss_beacon);
2787
2788         priv->ibss_beacon = NULL;
2789
2790         priv->beacon_int = priv->hw->conf.beacon_int;
2791         priv->timestamp = 0;
2792         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2793                 priv->beacon_int = 0;
2794
2795         spin_unlock_irqrestore(&priv->lock, flags);
2796
2797         if (!iwl_is_ready_rf(priv)) {
2798                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2799                 mutex_unlock(&priv->mutex);
2800                 return;
2801         }
2802
2803         /* we are restarting association process
2804          * clear RXON_FILTER_ASSOC_MSK bit
2805          */
2806         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2807                 iwl_scan_cancel_timeout(priv, 100);
2808                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2809                 iwl_commit_rxon(priv);
2810         }
2811
2812         iwl_power_update_mode(priv, 0);
2813
2814         /* Per mac80211.h: This is only used in IBSS mode... */
2815         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2816
2817                 /* switch to CAM during association period.
2818                  * the ucode will block any association/authentication
2819                  * frome during assiciation period if it can not hear
2820                  * the AP because of PM. the timer enable PM back is
2821                  * association do not complete
2822                  */
2823                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2824                                                      IEEE80211_CHAN_RADAR))
2825                                 iwl_power_disable_management(priv, 3000);
2826
2827                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2828                 mutex_unlock(&priv->mutex);
2829                 return;
2830         }
2831
2832         iwl_set_rate(priv);
2833
2834         mutex_unlock(&priv->mutex);
2835
2836         IWL_DEBUG_MAC80211(priv, "leave\n");
2837 }
2838
2839 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2840 {
2841         struct iwl_priv *priv = hw->priv;
2842         unsigned long flags;
2843         __le64 timestamp;
2844
2845         IWL_DEBUG_MAC80211(priv, "enter\n");
2846
2847         if (!iwl_is_ready_rf(priv)) {
2848                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2849                 return -EIO;
2850         }
2851
2852         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2853                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2854                 return -EIO;
2855         }
2856
2857         spin_lock_irqsave(&priv->lock, flags);
2858
2859         if (priv->ibss_beacon)
2860                 dev_kfree_skb(priv->ibss_beacon);
2861
2862         priv->ibss_beacon = skb;
2863
2864         priv->assoc_id = 0;
2865         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2866         priv->timestamp = le64_to_cpu(timestamp);
2867
2868         IWL_DEBUG_MAC80211(priv, "leave\n");
2869         spin_unlock_irqrestore(&priv->lock, flags);
2870
2871         iwl_reset_qos(priv);
2872
2873         iwl_post_associate(priv);
2874
2875
2876         return 0;
2877 }
2878
2879 /*****************************************************************************
2880  *
2881  * sysfs attributes
2882  *
2883  *****************************************************************************/
2884
2885 #ifdef CONFIG_IWLWIFI_DEBUG
2886
2887 /*
2888  * The following adds a new attribute to the sysfs representation
2889  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2890  * used for controlling the debug level.
2891  *
2892  * See the level definitions in iwl for details.
2893  */
2894
2895 static ssize_t show_debug_level(struct device *d,
2896                                 struct device_attribute *attr, char *buf)
2897 {
2898         struct iwl_priv *priv = d->driver_data;
2899
2900         return sprintf(buf, "0x%08X\n", priv->debug_level);
2901 }
2902 static ssize_t store_debug_level(struct device *d,
2903                                 struct device_attribute *attr,
2904                                  const char *buf, size_t count)
2905 {
2906         struct iwl_priv *priv = d->driver_data;
2907         unsigned long val;
2908         int ret;
2909
2910         ret = strict_strtoul(buf, 0, &val);
2911         if (ret)
2912                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2913         else
2914                 priv->debug_level = val;
2915
2916         return strnlen(buf, count);
2917 }
2918
2919 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2920                         show_debug_level, store_debug_level);
2921
2922
2923 #endif /* CONFIG_IWLWIFI_DEBUG */
2924
2925
2926 static ssize_t show_version(struct device *d,
2927                                 struct device_attribute *attr, char *buf)
2928 {
2929         struct iwl_priv *priv = d->driver_data;
2930         struct iwl_alive_resp *palive = &priv->card_alive;
2931         ssize_t pos = 0;
2932         u16 eeprom_ver;
2933
2934         if (palive->is_valid)
2935                 pos += sprintf(buf + pos,
2936                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2937                                 "fw type: 0x%01X 0x%01X\n",
2938                                 palive->ucode_major, palive->ucode_minor,
2939                                 palive->sw_rev[0], palive->sw_rev[1],
2940                                 palive->ver_type, palive->ver_subtype);
2941         else
2942                 pos += sprintf(buf + pos, "fw not loaded\n");
2943
2944         if (priv->eeprom) {
2945                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2946                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2947                                  eeprom_ver);
2948         } else {
2949                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2950         }
2951
2952         return pos;
2953 }
2954
2955 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2956
2957 static ssize_t show_temperature(struct device *d,
2958                                 struct device_attribute *attr, char *buf)
2959 {
2960         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2961
2962         if (!iwl_is_alive(priv))
2963                 return -EAGAIN;
2964
2965         return sprintf(buf, "%d\n", priv->temperature);
2966 }
2967
2968 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2969
2970 static ssize_t show_tx_power(struct device *d,
2971                              struct device_attribute *attr, char *buf)
2972 {
2973         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2974
2975         if (!iwl_is_ready_rf(priv))
2976                 return sprintf(buf, "off\n");
2977         else
2978                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2979 }
2980
2981 static ssize_t store_tx_power(struct device *d,
2982                               struct device_attribute *attr,
2983                               const char *buf, size_t count)
2984 {
2985         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2986         unsigned long val;
2987         int ret;
2988
2989         ret = strict_strtoul(buf, 10, &val);
2990         if (ret)
2991                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2992         else
2993                 iwl_set_tx_power(priv, val, false);
2994
2995         return count;
2996 }
2997
2998 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2999
3000 static ssize_t show_flags(struct device *d,
3001                           struct device_attribute *attr, char *buf)
3002 {
3003         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3004
3005         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3006 }
3007
3008 static ssize_t store_flags(struct device *d,
3009                            struct device_attribute *attr,
3010                            const char *buf, size_t count)
3011 {
3012         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3013         unsigned long val;
3014         u32 flags;
3015         int ret = strict_strtoul(buf, 0, &val);
3016         if (ret)
3017                 return ret;
3018         flags = (u32)val;
3019
3020         mutex_lock(&priv->mutex);
3021         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3022                 /* Cancel any currently running scans... */
3023                 if (iwl_scan_cancel_timeout(priv, 100))
3024                         IWL_WARN(priv, "Could not cancel scan.\n");
3025                 else {
3026                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3027                         priv->staging_rxon.flags = cpu_to_le32(flags);
3028                         iwl_commit_rxon(priv);
3029                 }
3030         }
3031         mutex_unlock(&priv->mutex);
3032
3033         return count;
3034 }
3035
3036 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3037
3038 static ssize_t show_filter_flags(struct device *d,
3039                                  struct device_attribute *attr, char *buf)
3040 {
3041         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3042
3043         return sprintf(buf, "0x%04X\n",
3044                 le32_to_cpu(priv->active_rxon.filter_flags));
3045 }
3046
3047 static ssize_t store_filter_flags(struct device *d,
3048                                   struct device_attribute *attr,
3049                                   const char *buf, size_t count)
3050 {
3051         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3052         unsigned long val;
3053         u32 filter_flags;
3054         int ret = strict_strtoul(buf, 0, &val);
3055         if (ret)
3056                 return ret;
3057         filter_flags = (u32)val;
3058
3059         mutex_lock(&priv->mutex);
3060         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3061                 /* Cancel any currently running scans... */
3062                 if (iwl_scan_cancel_timeout(priv, 100))
3063                         IWL_WARN(priv, "Could not cancel scan.\n");
3064                 else {
3065                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3066                                        "0x%04X\n", filter_flags);
3067                         priv->staging_rxon.filter_flags =
3068                                 cpu_to_le32(filter_flags);
3069                         iwl_commit_rxon(priv);
3070                 }
3071         }
3072         mutex_unlock(&priv->mutex);
3073
3074         return count;
3075 }
3076
3077 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3078                    store_filter_flags);
3079
3080 static ssize_t store_power_level(struct device *d,
3081                                  struct device_attribute *attr,
3082                                  const char *buf, size_t count)
3083 {
3084         struct iwl_priv *priv = dev_get_drvdata(d);
3085         int ret;
3086         unsigned long mode;
3087
3088
3089         mutex_lock(&priv->mutex);
3090
3091         ret = strict_strtoul(buf, 10, &mode);
3092         if (ret)
3093                 goto out;
3094
3095         ret = iwl_power_set_user_mode(priv, mode);
3096         if (ret) {
3097                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3098                 goto out;
3099         }
3100         ret = count;
3101
3102  out:
3103         mutex_unlock(&priv->mutex);
3104         return ret;
3105 }
3106
3107 static ssize_t show_power_level(struct device *d,
3108                                 struct device_attribute *attr, char *buf)
3109 {
3110         struct iwl_priv *priv = dev_get_drvdata(d);
3111         int mode = priv->power_data.user_power_setting;
3112         int system = priv->power_data.system_power_setting;
3113         int level = priv->power_data.power_mode;
3114         char *p = buf;
3115
3116         switch (system) {
3117         case IWL_POWER_SYS_AUTO:
3118                 p += sprintf(p, "SYSTEM:auto");
3119                 break;
3120         case IWL_POWER_SYS_AC:
3121                 p += sprintf(p, "SYSTEM:ac");
3122                 break;
3123         case IWL_POWER_SYS_BATTERY:
3124                 p += sprintf(p, "SYSTEM:battery");
3125                 break;
3126         }
3127
3128         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3129                         "fixed" : "auto");
3130         p += sprintf(p, "\tINDEX:%d", level);
3131         p += sprintf(p, "\n");
3132         return p - buf + 1;
3133 }
3134
3135 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3136                    store_power_level);
3137
3138
3139 static ssize_t show_statistics(struct device *d,
3140                                struct device_attribute *attr, char *buf)
3141 {
3142         struct iwl_priv *priv = dev_get_drvdata(d);
3143         u32 size = sizeof(struct iwl_notif_statistics);
3144         u32 len = 0, ofs = 0;
3145         u8 *data = (u8 *)&priv->statistics;
3146         int rc = 0;
3147
3148         if (!iwl_is_alive(priv))
3149                 return -EAGAIN;
3150
3151         mutex_lock(&priv->mutex);
3152         rc = iwl_send_statistics_request(priv, 0);
3153         mutex_unlock(&priv->mutex);
3154
3155         if (rc) {
3156                 len = sprintf(buf,
3157                               "Error sending statistics request: 0x%08X\n", rc);
3158                 return len;
3159         }
3160
3161         while (size && (PAGE_SIZE - len)) {
3162                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3163                                    PAGE_SIZE - len, 1);
3164                 len = strlen(buf);
3165                 if (PAGE_SIZE - len)
3166                         buf[len++] = '\n';
3167
3168                 ofs += 16;
3169                 size -= min(size, 16U);
3170         }
3171
3172         return len;
3173 }
3174
3175 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3176
3177
3178 /*****************************************************************************
3179  *
3180  * driver setup and teardown
3181  *
3182  *****************************************************************************/
3183
3184 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3185 {
3186         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3187
3188         init_waitqueue_head(&priv->wait_command_queue);
3189
3190         INIT_WORK(&priv->up, iwl_bg_up);
3191         INIT_WORK(&priv->restart, iwl_bg_restart);
3192         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3193         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3194         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3195         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3196         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3197         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3198
3199         iwl_setup_scan_deferred_work(priv);
3200         iwl_setup_power_deferred_work(priv);
3201
3202         if (priv->cfg->ops->lib->setup_deferred_work)
3203                 priv->cfg->ops->lib->setup_deferred_work(priv);
3204
3205         init_timer(&priv->statistics_periodic);
3206         priv->statistics_periodic.data = (unsigned long)priv;
3207         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3208
3209         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3210                      iwl_irq_tasklet, (unsigned long)priv);
3211 }
3212
3213 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3214 {
3215         if (priv->cfg->ops->lib->cancel_deferred_work)
3216                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3217
3218         cancel_delayed_work_sync(&priv->init_alive_start);
3219         cancel_delayed_work(&priv->scan_check);
3220         cancel_delayed_work_sync(&priv->set_power_save);
3221         cancel_delayed_work(&priv->alive_start);
3222         cancel_work_sync(&priv->beacon_update);
3223         del_timer_sync(&priv->statistics_periodic);
3224 }
3225
3226 static struct attribute *iwl_sysfs_entries[] = {
3227         &dev_attr_flags.attr,
3228         &dev_attr_filter_flags.attr,
3229         &dev_attr_power_level.attr,
3230         &dev_attr_statistics.attr,
3231         &dev_attr_temperature.attr,
3232         &dev_attr_tx_power.attr,
3233 #ifdef CONFIG_IWLWIFI_DEBUG
3234         &dev_attr_debug_level.attr,
3235 #endif
3236         &dev_attr_version.attr,
3237
3238         NULL
3239 };
3240
3241 static struct attribute_group iwl_attribute_group = {
3242         .name = NULL,           /* put in device directory */
3243         .attrs = iwl_sysfs_entries,
3244 };
3245
3246 static struct ieee80211_ops iwl_hw_ops = {
3247         .tx = iwl_mac_tx,
3248         .start = iwl_mac_start,
3249         .stop = iwl_mac_stop,
3250         .add_interface = iwl_mac_add_interface,
3251         .remove_interface = iwl_mac_remove_interface,
3252         .config = iwl_mac_config,
3253         .config_interface = iwl_mac_config_interface,
3254         .configure_filter = iwl_configure_filter,
3255         .set_key = iwl_mac_set_key,
3256         .update_tkip_key = iwl_mac_update_tkip_key,
3257         .get_stats = iwl_mac_get_stats,
3258         .get_tx_stats = iwl_mac_get_tx_stats,
3259         .conf_tx = iwl_mac_conf_tx,
3260         .reset_tsf = iwl_mac_reset_tsf,
3261         .bss_info_changed = iwl_bss_info_changed,
3262         .ampdu_action = iwl_mac_ampdu_action,
3263         .hw_scan = iwl_mac_hw_scan
3264 };
3265
3266 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3267 {
3268         int err = 0;
3269         struct iwl_priv *priv;
3270         struct ieee80211_hw *hw;
3271         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3272         unsigned long flags;
3273         u16 pci_cmd;
3274
3275         /************************
3276          * 1. Allocating HW data
3277          ************************/
3278
3279         /* Disabling hardware scan means that mac80211 will perform scans
3280          * "the hard way", rather than using device's scan. */
3281         if (cfg->mod_params->disable_hw_scan) {
3282                 if (cfg->mod_params->debug & IWL_DL_INFO)
3283          &nb