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[linux-2.6.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_TODEVICE);
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 /*
605  * QoS  support
606 */
607 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
608 {
609         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
610                 return;
611
612         priv->qos_data.def_qos_parm.qos_flags = 0;
613
614         if (priv->qos_data.qos_cap.q_AP.queue_request &&
615             !priv->qos_data.qos_cap.q_AP.txop_request)
616                 priv->qos_data.def_qos_parm.qos_flags |=
617                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
618         if (priv->qos_data.qos_active)
619                 priv->qos_data.def_qos_parm.qos_flags |=
620                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
621
622         if (priv->current_ht_config.is_ht)
623                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
624
625         if (force || iwl_is_associated(priv)) {
626                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
627                                 priv->qos_data.qos_active,
628                                 priv->qos_data.def_qos_parm.qos_flags);
629
630                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
631                                        sizeof(struct iwl_qosparam_cmd),
632                                        &priv->qos_data.def_qos_parm, NULL);
633         }
634 }
635
636 #define MAX_UCODE_BEACON_INTERVAL       4096
637
638 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
639 {
640         u16 new_val = 0;
641         u16 beacon_factor = 0;
642
643         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
644                                         / MAX_UCODE_BEACON_INTERVAL;
645         new_val = beacon_val / beacon_factor;
646
647         return new_val;
648 }
649
650 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
651 {
652         u64 tsf;
653         s32 interval_tm, rem;
654         unsigned long flags;
655         struct ieee80211_conf *conf = NULL;
656         u16 beacon_int = 0;
657
658         conf = ieee80211_get_hw_conf(priv->hw);
659
660         spin_lock_irqsave(&priv->lock, flags);
661         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
662         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
663
664         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
665                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
666                 priv->rxon_timing.atim_window = 0;
667         } else {
668                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
669
670                 /* TODO: we need to get atim_window from upper stack
671                  * for now we set to 0 */
672                 priv->rxon_timing.atim_window = 0;
673         }
674
675         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
676
677         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
678         interval_tm = beacon_int * 1024;
679         rem = do_div(tsf, interval_tm);
680         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
681
682         spin_unlock_irqrestore(&priv->lock, flags);
683         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
684                         le16_to_cpu(priv->rxon_timing.beacon_interval),
685                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
686                         le16_to_cpu(priv->rxon_timing.atim_window));
687 }
688
689 static int iwl_set_mode(struct iwl_priv *priv, int mode)
690 {
691         iwl_connection_init_rx_config(priv, mode);
692         iwl_set_rxon_chain(priv);
693         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
694
695         iwl_clear_stations_table(priv);
696
697         /* dont commit rxon if rf-kill is on*/
698         if (!iwl_is_ready_rf(priv))
699                 return -EAGAIN;
700
701         cancel_delayed_work(&priv->scan_check);
702         if (iwl_scan_cancel_timeout(priv, 100)) {
703                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
704                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
705                 return -EAGAIN;
706         }
707
708         iwl_commit_rxon(priv);
709
710         return 0;
711 }
712
713 /******************************************************************************
714  *
715  * Generic RX handler implementations
716  *
717  ******************************************************************************/
718 static void iwl_rx_reply_alive(struct iwl_priv *priv,
719                                 struct iwl_rx_mem_buffer *rxb)
720 {
721         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
722         struct iwl_alive_resp *palive;
723         struct delayed_work *pwork;
724
725         palive = &pkt->u.alive_frame;
726
727         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
728                        "0x%01X 0x%01X\n",
729                        palive->is_valid, palive->ver_type,
730                        palive->ver_subtype);
731
732         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
733                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
734                 memcpy(&priv->card_alive_init,
735                        &pkt->u.alive_frame,
736                        sizeof(struct iwl_init_alive_resp));
737                 pwork = &priv->init_alive_start;
738         } else {
739                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
740                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
741                        sizeof(struct iwl_alive_resp));
742                 pwork = &priv->alive_start;
743         }
744
745         /* We delay the ALIVE response by 5ms to
746          * give the HW RF Kill time to activate... */
747         if (palive->is_valid == UCODE_VALID_OK)
748                 queue_delayed_work(priv->workqueue, pwork,
749                                    msecs_to_jiffies(5));
750         else
751                 IWL_WARN(priv, "uCode did not respond OK.\n");
752 }
753
754 static void iwl_rx_reply_error(struct iwl_priv *priv,
755                                    struct iwl_rx_mem_buffer *rxb)
756 {
757         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
758
759         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
760                 "seq 0x%04X ser 0x%08X\n",
761                 le32_to_cpu(pkt->u.err_resp.error_type),
762                 get_cmd_string(pkt->u.err_resp.cmd_id),
763                 pkt->u.err_resp.cmd_id,
764                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
765                 le32_to_cpu(pkt->u.err_resp.error_info));
766 }
767
768 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
769                                       struct iwl_rx_mem_buffer *rxb)
770 {
771 #ifdef CONFIG_IWLWIFI_DEBUG
772         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
773         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
774         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
775                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
776 #endif
777 }
778
779 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
780                                              struct iwl_rx_mem_buffer *rxb)
781 {
782         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
783         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
784                         "notification for %s:\n",
785                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
786         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
787 }
788
789 static void iwl_bg_beacon_update(struct work_struct *work)
790 {
791         struct iwl_priv *priv =
792                 container_of(work, struct iwl_priv, beacon_update);
793         struct sk_buff *beacon;
794
795         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
796         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
797
798         if (!beacon) {
799                 IWL_ERR(priv, "update beacon failed\n");
800                 return;
801         }
802
803         mutex_lock(&priv->mutex);
804         /* new beacon skb is allocated every time; dispose previous.*/
805         if (priv->ibss_beacon)
806                 dev_kfree_skb(priv->ibss_beacon);
807
808         priv->ibss_beacon = beacon;
809         mutex_unlock(&priv->mutex);
810
811         iwl_send_beacon_cmd(priv);
812 }
813
814 /**
815  * iwl_bg_statistics_periodic - Timer callback to queue statistics
816  *
817  * This callback is provided in order to send a statistics request.
818  *
819  * This timer function is continually reset to execute within
820  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
821  * was received.  We need to ensure we receive the statistics in order
822  * to update the temperature used for calibrating the TXPOWER.
823  */
824 static void iwl_bg_statistics_periodic(unsigned long data)
825 {
826         struct iwl_priv *priv = (struct iwl_priv *)data;
827
828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
829                 return;
830
831         /* dont send host command if rf-kill is on */
832         if (!iwl_is_ready_rf(priv))
833                 return;
834
835         iwl_send_statistics_request(priv, CMD_ASYNC);
836 }
837
838 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
839                                 struct iwl_rx_mem_buffer *rxb)
840 {
841 #ifdef CONFIG_IWLWIFI_DEBUG
842         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
843         struct iwl4965_beacon_notif *beacon =
844                 (struct iwl4965_beacon_notif *)pkt->u.raw;
845         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
846
847         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
848                 "tsf %d %d rate %d\n",
849                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
850                 beacon->beacon_notify_hdr.failure_frame,
851                 le32_to_cpu(beacon->ibss_mgr_status),
852                 le32_to_cpu(beacon->high_tsf),
853                 le32_to_cpu(beacon->low_tsf), rate);
854 #endif
855
856         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
857             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
858                 queue_work(priv->workqueue, &priv->beacon_update);
859 }
860
861 /* Handle notification from uCode that card's power state is changing
862  * due to software, hardware, or critical temperature RFKILL */
863 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
864                                     struct iwl_rx_mem_buffer *rxb)
865 {
866         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
867         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
868         unsigned long status = priv->status;
869
870         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
871                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
872                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
873
874         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
875                      RF_CARD_DISABLED)) {
876
877                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
878                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
879
880                 if (!iwl_grab_nic_access(priv)) {
881                         iwl_write_direct32(
882                                 priv, HBUS_TARG_MBX_C,
883                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
884
885                         iwl_release_nic_access(priv);
886                 }
887
888                 if (!(flags & RXON_CARD_DISABLED)) {
889                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
890                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
891                         if (!iwl_grab_nic_access(priv)) {
892                                 iwl_write_direct32(
893                                         priv, HBUS_TARG_MBX_C,
894                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
895
896                                 iwl_release_nic_access(priv);
897                         }
898                 }
899
900                 if (flags & RF_CARD_DISABLED) {
901                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
902                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
903                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
904                         if (!iwl_grab_nic_access(priv))
905                                 iwl_release_nic_access(priv);
906                 }
907         }
908
909         if (flags & HW_CARD_DISABLED)
910                 set_bit(STATUS_RF_KILL_HW, &priv->status);
911         else
912                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
913
914
915         if (flags & SW_CARD_DISABLED)
916                 set_bit(STATUS_RF_KILL_SW, &priv->status);
917         else
918                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
919
920         if (!(flags & RXON_CARD_DISABLED))
921                 iwl_scan_cancel(priv);
922
923         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
924              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
925             (test_bit(STATUS_RF_KILL_SW, &status) !=
926              test_bit(STATUS_RF_KILL_SW, &priv->status)))
927                 queue_work(priv->workqueue, &priv->rf_kill);
928         else
929                 wake_up_interruptible(&priv->wait_command_queue);
930 }
931
932 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
933 {
934         int ret;
935         unsigned long flags;
936
937         spin_lock_irqsave(&priv->lock, flags);
938         ret = iwl_grab_nic_access(priv);
939         if (ret)
940                 goto err;
941
942         if (src == IWL_PWR_SRC_VAUX) {
943                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
944                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
945                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
946                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
947         } else {
948                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
949                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
950                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
951         }
952
953         iwl_release_nic_access(priv);
954 err:
955         spin_unlock_irqrestore(&priv->lock, flags);
956         return ret;
957 }
958
959 /**
960  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
961  *
962  * Setup the RX handlers for each of the reply types sent from the uCode
963  * to the host.
964  *
965  * This function chains into the hardware specific files for them to setup
966  * any hardware specific handlers as well.
967  */
968 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
969 {
970         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
971         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
972         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
973         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
974         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
975             iwl_rx_pm_debug_statistics_notif;
976         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
977
978         /*
979          * The same handler is used for both the REPLY to a discrete
980          * statistics request from the host as well as for the periodic
981          * statistics notifications (after received beacons) from the uCode.
982          */
983         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
984         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
985
986         iwl_setup_spectrum_handlers(priv);
987         iwl_setup_rx_scan_handlers(priv);
988
989         /* status change handler */
990         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
991
992         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
993             iwl_rx_missed_beacon_notif;
994         /* Rx handlers */
995         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
996         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
997         /* block ack */
998         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
999         /* Set up hardware specific Rx handlers */
1000         priv->cfg->ops->lib->rx_handler_setup(priv);
1001 }
1002
1003 /**
1004  * iwl_rx_handle - Main entry function for receiving responses from uCode
1005  *
1006  * Uses the priv->rx_handlers callback function array to invoke
1007  * the appropriate handlers, including command responses,
1008  * frame-received notifications, and other notifications.
1009  */
1010 void iwl_rx_handle(struct iwl_priv *priv)
1011 {
1012         struct iwl_rx_mem_buffer *rxb;
1013         struct iwl_rx_packet *pkt;
1014         struct iwl_rx_queue *rxq = &priv->rxq;
1015         u32 r, i;
1016         int reclaim;
1017         unsigned long flags;
1018         u8 fill_rx = 0;
1019         u32 count = 8;
1020
1021         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1022          * buffer that the driver may process (last buffer filled by ucode). */
1023         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1024         i = rxq->read;
1025
1026         /* Rx interrupt, but nothing sent from uCode */
1027         if (i == r)
1028                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1029
1030         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1031                 fill_rx = 1;
1032
1033         while (i != r) {
1034                 rxb = rxq->queue[i];
1035
1036                 /* If an RXB doesn't have a Rx queue slot associated with it,
1037                  * then a bug has been introduced in the queue refilling
1038                  * routines -- catch it here */
1039                 BUG_ON(rxb == NULL);
1040
1041                 rxq->queue[i] = NULL;
1042
1043                 dma_sync_single_range_for_cpu(
1044                                 &priv->pci_dev->dev, rxb->real_dma_addr,
1045                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
1046                                 priv->hw_params.rx_buf_size,
1047                                 PCI_DMA_FROMDEVICE);
1048                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1049
1050                 /* Reclaim a command buffer only if this packet is a response
1051                  *   to a (driver-originated) command.
1052                  * If the packet (e.g. Rx frame) originated from uCode,
1053                  *   there is no command buffer to reclaim.
1054                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1055                  *   but apparently a few don't get set; catch them here. */
1056                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1057                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1058                         (pkt->hdr.cmd != REPLY_RX) &&
1059                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1060                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1061                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1062                         (pkt->hdr.cmd != REPLY_TX);
1063
1064                 /* Based on type of command response or notification,
1065                  *   handle those that need handling via function in
1066                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1067                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1068                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1069                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1070                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1071                 } else {
1072                         /* No handling needed */
1073                         IWL_DEBUG_RX(priv,
1074                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1075                                 r, i, get_cmd_string(pkt->hdr.cmd),
1076                                 pkt->hdr.cmd);
1077                 }
1078
1079                 if (reclaim) {
1080                         /* Invoke any callbacks, transfer the skb to caller, and
1081                          * fire off the (possibly) blocking iwl_send_cmd()
1082                          * as we reclaim the driver command queue */
1083                         if (rxb && rxb->skb)
1084                                 iwl_tx_cmd_complete(priv, rxb);
1085                         else
1086                                 IWL_WARN(priv, "Claim null rxb?\n");
1087                 }
1088
1089                 /* For now we just don't re-use anything.  We can tweak this
1090                  * later to try and re-use notification packets and SKBs that
1091                  * fail to Rx correctly */
1092                 if (rxb->skb != NULL) {
1093                         priv->alloc_rxb_skb--;
1094                         dev_kfree_skb_any(rxb->skb);
1095                         rxb->skb = NULL;
1096                 }
1097
1098                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1099                                  priv->hw_params.rx_buf_size + 256,
1100                                  PCI_DMA_FROMDEVICE);
1101                 spin_lock_irqsave(&rxq->lock, flags);
1102                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1103                 spin_unlock_irqrestore(&rxq->lock, flags);
1104                 i = (i + 1) & RX_QUEUE_MASK;
1105                 /* If there are a lot of unused frames,
1106                  * restock the Rx queue so ucode wont assert. */
1107                 if (fill_rx) {
1108                         count++;
1109                         if (count >= 8) {
1110                                 priv->rxq.read = i;
1111                                 iwl_rx_queue_restock(priv);
1112                                 count = 0;
1113                         }
1114                 }
1115         }
1116
1117         /* Backtrack one entry */
1118         priv->rxq.read = i;
1119         iwl_rx_queue_restock(priv);
1120 }
1121
1122 /* call this function to flush any scheduled tasklet */
1123 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1124 {
1125         /* wait to make sure we flush pending tasklet*/
1126         synchronize_irq(priv->pci_dev->irq);
1127         tasklet_kill(&priv->irq_tasklet);
1128 }
1129
1130 static void iwl_error_recovery(struct iwl_priv *priv)
1131 {
1132         unsigned long flags;
1133
1134         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1135                sizeof(priv->staging_rxon));
1136         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1137         iwl_commit_rxon(priv);
1138
1139         iwl_rxon_add_station(priv, priv->bssid, 1);
1140
1141         spin_lock_irqsave(&priv->lock, flags);
1142         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1143         priv->error_recovering = 0;
1144         spin_unlock_irqrestore(&priv->lock, flags);
1145 }
1146
1147 static void iwl_irq_tasklet(struct iwl_priv *priv)
1148 {
1149         u32 inta, handled = 0;
1150         u32 inta_fh;
1151         unsigned long flags;
1152 #ifdef CONFIG_IWLWIFI_DEBUG
1153         u32 inta_mask;
1154 #endif
1155
1156         spin_lock_irqsave(&priv->lock, flags);
1157
1158         /* Ack/clear/reset pending uCode interrupts.
1159          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1160          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1161         inta = iwl_read32(priv, CSR_INT);
1162         iwl_write32(priv, CSR_INT, inta);
1163
1164         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1165          * Any new interrupts that happen after this, either while we're
1166          * in this tasklet, or later, will show up in next ISR/tasklet. */
1167         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1168         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1169
1170 #ifdef CONFIG_IWLWIFI_DEBUG
1171         if (priv->debug_level & IWL_DL_ISR) {
1172                 /* just for debug */
1173                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1174                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1175                               inta, inta_mask, inta_fh);
1176         }
1177 #endif
1178
1179         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1180          * atomic, make sure that inta covers all the interrupts that
1181          * we've discovered, even if FH interrupt came in just after
1182          * reading CSR_INT. */
1183         if (inta_fh & CSR49_FH_INT_RX_MASK)
1184                 inta |= CSR_INT_BIT_FH_RX;
1185         if (inta_fh & CSR49_FH_INT_TX_MASK)
1186                 inta |= CSR_INT_BIT_FH_TX;
1187
1188         /* Now service all interrupt bits discovered above. */
1189         if (inta & CSR_INT_BIT_HW_ERR) {
1190                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1191
1192                 /* Tell the device to stop sending interrupts */
1193                 iwl_disable_interrupts(priv);
1194
1195                 iwl_irq_handle_error(priv);
1196
1197                 handled |= CSR_INT_BIT_HW_ERR;
1198
1199                 spin_unlock_irqrestore(&priv->lock, flags);
1200
1201                 return;
1202         }
1203
1204 #ifdef CONFIG_IWLWIFI_DEBUG
1205         if (priv->debug_level & (IWL_DL_ISR)) {
1206                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1207                 if (inta & CSR_INT_BIT_SCD)
1208                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1209                                       "the frame/frames.\n");
1210
1211                 /* Alive notification via Rx interrupt will do the real work */
1212                 if (inta & CSR_INT_BIT_ALIVE)
1213                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1214         }
1215 #endif
1216         /* Safely ignore these bits for debug checks below */
1217         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1218
1219         /* HW RF KILL switch toggled */
1220         if (inta & CSR_INT_BIT_RF_KILL) {
1221                 int hw_rf_kill = 0;
1222                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1223                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1224                         hw_rf_kill = 1;
1225
1226                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1227                                 hw_rf_kill ? "disable radio" : "enable radio");
1228
1229                 /* driver only loads ucode once setting the interface up.
1230                  * the driver allows loading the ucode even if the radio
1231                  * is killed. Hence update the killswitch state here. The
1232                  * rfkill handler will care about restarting if needed.
1233                  */
1234                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1235                         if (hw_rf_kill)
1236                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1237                         else
1238                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1239                         queue_work(priv->workqueue, &priv->rf_kill);
1240                 }
1241
1242                 handled |= CSR_INT_BIT_RF_KILL;
1243         }
1244
1245         /* Chip got too hot and stopped itself */
1246         if (inta & CSR_INT_BIT_CT_KILL) {
1247                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1248                 handled |= CSR_INT_BIT_CT_KILL;
1249         }
1250
1251         /* Error detected by uCode */
1252         if (inta & CSR_INT_BIT_SW_ERR) {
1253                 IWL_ERR(priv, "Microcode SW error detected. "
1254                         " Restarting 0x%X.\n", inta);
1255                 iwl_irq_handle_error(priv);
1256                 handled |= CSR_INT_BIT_SW_ERR;
1257         }
1258
1259         /* uCode wakes up after power-down sleep */
1260         if (inta & CSR_INT_BIT_WAKEUP) {
1261                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1262                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1263                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1264                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1265                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1266                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1267                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1268                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1269
1270                 handled |= CSR_INT_BIT_WAKEUP;
1271         }
1272
1273         /* All uCode command responses, including Tx command responses,
1274          * Rx "responses" (frame-received notification), and other
1275          * notifications from uCode come through here*/
1276         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1277                 iwl_rx_handle(priv);
1278                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1279         }
1280
1281         if (inta & CSR_INT_BIT_FH_TX) {
1282                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1283                 handled |= CSR_INT_BIT_FH_TX;
1284                 /* FH finished to write, send event */
1285                 priv->ucode_write_complete = 1;
1286                 wake_up_interruptible(&priv->wait_command_queue);
1287         }
1288
1289         if (inta & ~handled)
1290                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1291
1292         if (inta & ~CSR_INI_SET_MASK) {
1293                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1294                          inta & ~CSR_INI_SET_MASK);
1295                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1296         }
1297
1298         /* Re-enable all interrupts */
1299         /* only Re-enable if diabled by irq */
1300         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1301                 iwl_enable_interrupts(priv);
1302
1303 #ifdef CONFIG_IWLWIFI_DEBUG
1304         if (priv->debug_level & (IWL_DL_ISR)) {
1305                 inta = iwl_read32(priv, CSR_INT);
1306                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1307                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1308                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1309                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1310         }
1311 #endif
1312         spin_unlock_irqrestore(&priv->lock, flags);
1313 }
1314
1315 static irqreturn_t iwl_isr(int irq, void *data)
1316 {
1317         struct iwl_priv *priv = data;
1318         u32 inta, inta_mask;
1319         u32 inta_fh;
1320         if (!priv)
1321                 return IRQ_NONE;
1322
1323         spin_lock(&priv->lock);
1324
1325         /* Disable (but don't clear!) interrupts here to avoid
1326          *    back-to-back ISRs and sporadic interrupts from our NIC.
1327          * If we have something to service, the tasklet will re-enable ints.
1328          * If we *don't* have something, we'll re-enable before leaving here. */
1329         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1330         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1331
1332         /* Discover which interrupts are active/pending */
1333         inta = iwl_read32(priv, CSR_INT);
1334         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1335
1336         /* Ignore interrupt if there's nothing in NIC to service.
1337          * This may be due to IRQ shared with another device,
1338          * or due to sporadic interrupts thrown from our NIC. */
1339         if (!inta && !inta_fh) {
1340                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1341                 goto none;
1342         }
1343
1344         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1345                 /* Hardware disappeared. It might have already raised
1346                  * an interrupt */
1347                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1348                 goto unplugged;
1349         }
1350
1351         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1352                       inta, inta_mask, inta_fh);
1353
1354         inta &= ~CSR_INT_BIT_SCD;
1355
1356         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1357         if (likely(inta || inta_fh))
1358                 tasklet_schedule(&priv->irq_tasklet);
1359
1360  unplugged:
1361         spin_unlock(&priv->lock);
1362         return IRQ_HANDLED;
1363
1364  none:
1365         /* re-enable interrupts here since we don't have anything to service. */
1366         /* only Re-enable if diabled by irq */
1367         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1368                 iwl_enable_interrupts(priv);
1369         spin_unlock(&priv->lock);
1370         return IRQ_NONE;
1371 }
1372
1373 /******************************************************************************
1374  *
1375  * uCode download functions
1376  *
1377  ******************************************************************************/
1378
1379 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1380 {
1381         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1382         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1383         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1384         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1385         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1386         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1387 }
1388
1389 static void iwl_nic_start(struct iwl_priv *priv)
1390 {
1391         /* Remove all resets to allow NIC to operate */
1392         iwl_write32(priv, CSR_RESET, 0);
1393 }
1394
1395
1396 /**
1397  * iwl_read_ucode - Read uCode images from disk file.
1398  *
1399  * Copy into buffers for card to fetch via bus-mastering
1400  */
1401 static int iwl_read_ucode(struct iwl_priv *priv)
1402 {
1403         struct iwl_ucode *ucode;
1404         int ret = -EINVAL, index;
1405         const struct firmware *ucode_raw;
1406         const char *name_pre = priv->cfg->fw_name_pre;
1407         const unsigned int api_max = priv->cfg->ucode_api_max;
1408         const unsigned int api_min = priv->cfg->ucode_api_min;
1409         char buf[25];
1410         u8 *src;
1411         size_t len;
1412         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1413
1414         /* Ask kernel firmware_class module to get the boot firmware off disk.
1415          * request_firmware() is synchronous, file is in memory on return. */
1416         for (index = api_max; index >= api_min; index--) {
1417                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1418                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1419                 if (ret < 0) {
1420                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1421                                   buf, ret);
1422                         if (ret == -ENOENT)
1423                                 continue;
1424                         else
1425                                 goto error;
1426                 } else {
1427                         if (index < api_max)
1428                                 IWL_ERR(priv, "Loaded firmware %s, "
1429                                         "which is deprecated. "
1430                                         "Please use API v%u instead.\n",
1431                                           buf, api_max);
1432
1433                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1434                                        buf, ucode_raw->size);
1435                         break;
1436                 }
1437         }
1438
1439         if (ret < 0)
1440                 goto error;
1441
1442         /* Make sure that we got at least our header! */
1443         if (ucode_raw->size < sizeof(*ucode)) {
1444                 IWL_ERR(priv, "File size way too small!\n");
1445                 ret = -EINVAL;
1446                 goto err_release;
1447         }
1448
1449         /* Data from ucode file:  header followed by uCode images */
1450         ucode = (void *)ucode_raw->data;
1451
1452         priv->ucode_ver = le32_to_cpu(ucode->ver);
1453         api_ver = IWL_UCODE_API(priv->ucode_ver);
1454         inst_size = le32_to_cpu(ucode->inst_size);
1455         data_size = le32_to_cpu(ucode->data_size);
1456         init_size = le32_to_cpu(ucode->init_size);
1457         init_data_size = le32_to_cpu(ucode->init_data_size);
1458         boot_size = le32_to_cpu(ucode->boot_size);
1459
1460         /* api_ver should match the api version forming part of the
1461          * firmware filename ... but we don't check for that and only rely
1462          * on the API version read from firware header from here on forward */
1463
1464         if (api_ver < api_min || api_ver > api_max) {
1465                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1466                           "Driver supports v%u, firmware is v%u.\n",
1467                           api_max, api_ver);
1468                 priv->ucode_ver = 0;
1469                 ret = -EINVAL;
1470                 goto err_release;
1471         }
1472         if (api_ver != api_max)
1473                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1474                           "got v%u. New firmware can be obtained "
1475                           "from http://www.intellinuxwireless.org.\n",
1476                           api_max, api_ver);
1477
1478         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1479                IWL_UCODE_MAJOR(priv->ucode_ver),
1480                IWL_UCODE_MINOR(priv->ucode_ver),
1481                IWL_UCODE_API(priv->ucode_ver),
1482                IWL_UCODE_SERIAL(priv->ucode_ver));
1483
1484         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1485                        priv->ucode_ver);
1486         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1487                        inst_size);
1488         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1489                        data_size);
1490         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1491                        init_size);
1492         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1493                        init_data_size);
1494         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1495                        boot_size);
1496
1497         /* Verify size of file vs. image size info in file's header */
1498         if (ucode_raw->size < sizeof(*ucode) +
1499                 inst_size + data_size + init_size +
1500                 init_data_size + boot_size) {
1501
1502                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1503                                (int)ucode_raw->size);
1504                 ret = -EINVAL;
1505                 goto err_release;
1506         }
1507
1508         /* Verify that uCode images will fit in card's SRAM */
1509         if (inst_size > priv->hw_params.max_inst_size) {
1510                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1511                                inst_size);
1512                 ret = -EINVAL;
1513                 goto err_release;
1514         }
1515
1516         if (data_size > priv->hw_params.max_data_size) {
1517                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1518                                 data_size);
1519                 ret = -EINVAL;
1520                 goto err_release;
1521         }
1522         if (init_size > priv->hw_params.max_inst_size) {
1523                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1524                         init_size);
1525                 ret = -EINVAL;
1526                 goto err_release;
1527         }
1528         if (init_data_size > priv->hw_params.max_data_size) {
1529                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1530                       init_data_size);
1531                 ret = -EINVAL;
1532                 goto err_release;
1533         }
1534         if (boot_size > priv->hw_params.max_bsm_size) {
1535                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1536                         boot_size);
1537                 ret = -EINVAL;
1538                 goto err_release;
1539         }
1540
1541         /* Allocate ucode buffers for card's bus-master loading ... */
1542
1543         /* Runtime instructions and 2 copies of data:
1544          * 1) unmodified from disk
1545          * 2) backup cache for save/restore during power-downs */
1546         priv->ucode_code.len = inst_size;
1547         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1548
1549         priv->ucode_data.len = data_size;
1550         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1551
1552         priv->ucode_data_backup.len = data_size;
1553         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1554
1555         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1556             !priv->ucode_data_backup.v_addr)
1557                 goto err_pci_alloc;
1558
1559         /* Initialization instructions and data */
1560         if (init_size && init_data_size) {
1561                 priv->ucode_init.len = init_size;
1562                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1563
1564                 priv->ucode_init_data.len = init_data_size;
1565                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1566
1567                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1568                         goto err_pci_alloc;
1569         }
1570
1571         /* Bootstrap (instructions only, no data) */
1572         if (boot_size) {
1573                 priv->ucode_boot.len = boot_size;
1574                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1575
1576                 if (!priv->ucode_boot.v_addr)
1577                         goto err_pci_alloc;
1578         }
1579
1580         /* Copy images into buffers for card's bus-master reads ... */
1581
1582         /* Runtime instructions (first block of data in file) */
1583         src = &ucode->data[0];
1584         len = priv->ucode_code.len;
1585         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1586         memcpy(priv->ucode_code.v_addr, src, len);
1587         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1588                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1589
1590         /* Runtime data (2nd block)
1591          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1592         src = &ucode->data[inst_size];
1593         len = priv->ucode_data.len;
1594         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1595         memcpy(priv->ucode_data.v_addr, src, len);
1596         memcpy(priv->ucode_data_backup.v_addr, src, len);
1597
1598         /* Initialization instructions (3rd block) */
1599         if (init_size) {
1600                 src = &ucode->data[inst_size + data_size];
1601                 len = priv->ucode_init.len;
1602                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1603                                 len);
1604                 memcpy(priv->ucode_init.v_addr, src, len);
1605         }
1606
1607         /* Initialization data (4th block) */
1608         if (init_data_size) {
1609                 src = &ucode->data[inst_size + data_size + init_size];
1610                 len = priv->ucode_init_data.len;
1611                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1612                                len);
1613                 memcpy(priv->ucode_init_data.v_addr, src, len);
1614         }
1615
1616         /* Bootstrap instructions (5th block) */
1617         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1618         len = priv->ucode_boot.len;
1619         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1620         memcpy(priv->ucode_boot.v_addr, src, len);
1621
1622         /* We have our copies now, allow OS release its copies */
1623         release_firmware(ucode_raw);
1624         return 0;
1625
1626  err_pci_alloc:
1627         IWL_ERR(priv, "failed to allocate pci memory\n");
1628         ret = -ENOMEM;
1629         iwl_dealloc_ucode_pci(priv);
1630
1631  err_release:
1632         release_firmware(ucode_raw);
1633
1634  error:
1635         return ret;
1636 }
1637
1638 /* temporary */
1639 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1640                                  struct sk_buff *skb);
1641
1642 /**
1643  * iwl_alive_start - called after REPLY_ALIVE notification received
1644  *                   from protocol/runtime uCode (initialization uCode's
1645  *                   Alive gets handled by iwl_init_alive_start()).
1646  */
1647 static void iwl_alive_start(struct iwl_priv *priv)
1648 {
1649         int ret = 0;
1650
1651         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1652
1653         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1654                 /* We had an error bringing up the hardware, so take it
1655                  * all the way back down so we can try again */
1656                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1657                 goto restart;
1658         }
1659
1660         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1661          * This is a paranoid check, because we would not have gotten the
1662          * "runtime" alive if code weren't properly loaded.  */
1663         if (iwl_verify_ucode(priv)) {
1664                 /* Runtime instruction load was bad;
1665                  * take it all the way back down so we can try again */
1666                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1667                 goto restart;
1668         }
1669
1670         iwl_clear_stations_table(priv);
1671         ret = priv->cfg->ops->lib->alive_notify(priv);
1672         if (ret) {
1673                 IWL_WARN(priv,
1674                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1675                 goto restart;
1676         }
1677
1678         /* After the ALIVE response, we can send host commands to the uCode */
1679         set_bit(STATUS_ALIVE, &priv->status);
1680
1681         if (iwl_is_rfkill(priv))
1682                 return;
1683
1684         ieee80211_wake_queues(priv->hw);
1685
1686         priv->active_rate = priv->rates_mask;
1687         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1688
1689         if (iwl_is_associated(priv)) {
1690                 struct iwl_rxon_cmd *active_rxon =
1691                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1692
1693                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1694                        sizeof(priv->staging_rxon));
1695                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1696         } else {
1697                 /* Initialize our rx_config data */
1698                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1699                 iwl_set_rxon_chain(priv);
1700                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1701         }
1702
1703         /* Configure Bluetooth device coexistence support */
1704         iwl_send_bt_config(priv);
1705
1706         iwl_reset_run_time_calib(priv);
1707
1708         /* Configure the adapter for unassociated operation */
1709         iwl_commit_rxon(priv);
1710
1711         /* At this point, the NIC is initialized and operational */
1712         iwl_rf_kill_ct_config(priv);
1713
1714         iwl_leds_register(priv);
1715
1716         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1717         set_bit(STATUS_READY, &priv->status);
1718         wake_up_interruptible(&priv->wait_command_queue);
1719
1720         if (priv->error_recovering)
1721                 iwl_error_recovery(priv);
1722
1723         iwl_power_update_mode(priv, 1);
1724
1725         /* reassociate for ADHOC mode */
1726         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1727                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1728                                                                 priv->vif);
1729                 if (beacon)
1730                         iwl_mac_beacon_update(priv->hw, beacon);
1731         }
1732
1733
1734         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1735                 iwl_set_mode(priv, priv->iw_mode);
1736
1737         return;
1738
1739  restart:
1740         queue_work(priv->workqueue, &priv->restart);
1741 }
1742
1743 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1744
1745 static void __iwl_down(struct iwl_priv *priv)
1746 {
1747         unsigned long flags;
1748         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1749
1750         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1751
1752         if (!exit_pending)
1753                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1754
1755         iwl_leds_unregister(priv);
1756
1757         iwl_clear_stations_table(priv);
1758
1759         /* Unblock any waiting calls */
1760         wake_up_interruptible_all(&priv->wait_command_queue);
1761
1762         /* Wipe out the EXIT_PENDING status bit if we are not actually
1763          * exiting the module */
1764         if (!exit_pending)
1765                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1766
1767         /* stop and reset the on-board processor */
1768         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1769
1770         /* tell the device to stop sending interrupts */
1771         spin_lock_irqsave(&priv->lock, flags);
1772         iwl_disable_interrupts(priv);
1773         spin_unlock_irqrestore(&priv->lock, flags);
1774         iwl_synchronize_irq(priv);
1775
1776         if (priv->mac80211_registered)
1777                 ieee80211_stop_queues(priv->hw);
1778
1779         /* If we have not previously called iwl_init() then
1780          * clear all bits but the RF Kill and SUSPEND bits and return */
1781         if (!iwl_is_init(priv)) {
1782                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1783                                         STATUS_RF_KILL_HW |
1784                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1785                                         STATUS_RF_KILL_SW |
1786                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1787                                         STATUS_GEO_CONFIGURED |
1788                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1789                                         STATUS_IN_SUSPEND |
1790                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1791                                         STATUS_EXIT_PENDING;
1792                 goto exit;
1793         }
1794
1795         /* ...otherwise clear out all the status bits but the RF Kill and
1796          * SUSPEND bits and continue taking the NIC down. */
1797         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1798                                 STATUS_RF_KILL_HW |
1799                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1800                                 STATUS_RF_KILL_SW |
1801                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1802                                 STATUS_GEO_CONFIGURED |
1803                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1804                                 STATUS_IN_SUSPEND |
1805                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1806                                 STATUS_FW_ERROR |
1807                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1808                                 STATUS_EXIT_PENDING;
1809
1810         spin_lock_irqsave(&priv->lock, flags);
1811         iwl_clear_bit(priv, CSR_GP_CNTRL,
1812                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1813         spin_unlock_irqrestore(&priv->lock, flags);
1814
1815         iwl_txq_ctx_stop(priv);
1816         iwl_rxq_stop(priv);
1817
1818         spin_lock_irqsave(&priv->lock, flags);
1819         if (!iwl_grab_nic_access(priv)) {
1820                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1821                                          APMG_CLK_VAL_DMA_CLK_RQT);
1822                 iwl_release_nic_access(priv);
1823         }
1824         spin_unlock_irqrestore(&priv->lock, flags);
1825
1826         udelay(5);
1827
1828         /* FIXME: apm_ops.suspend(priv) */
1829         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1830                 priv->cfg->ops->lib->apm_ops.stop(priv);
1831         else
1832                 priv->cfg->ops->lib->apm_ops.reset(priv);
1833  exit:
1834         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1835
1836         if (priv->ibss_beacon)
1837                 dev_kfree_skb(priv->ibss_beacon);
1838         priv->ibss_beacon = NULL;
1839
1840         /* clear out any free frames */
1841         iwl_clear_free_frames(priv);
1842 }
1843
1844 static void iwl_down(struct iwl_priv *priv)
1845 {
1846         mutex_lock(&priv->mutex);
1847         __iwl_down(priv);
1848         mutex_unlock(&priv->mutex);
1849
1850         iwl_cancel_deferred_work(priv);
1851 }
1852
1853 #define MAX_HW_RESTARTS 5
1854
1855 static int __iwl_up(struct iwl_priv *priv)
1856 {
1857         int i;
1858         int ret;
1859
1860         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1861                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1862                 return -EIO;
1863         }
1864
1865         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1866                 IWL_ERR(priv, "ucode not available for device bringup\n");
1867                 return -EIO;
1868         }
1869
1870         /* If platform's RF_KILL switch is NOT set to KILL */
1871         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1872                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1873         else
1874                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1875
1876         if (iwl_is_rfkill(priv)) {
1877                 iwl_enable_interrupts(priv);
1878                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1879                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1880                 return 0;
1881         }
1882
1883         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1884
1885         ret = iwl_hw_nic_init(priv);
1886         if (ret) {
1887                 IWL_ERR(priv, "Unable to init nic\n");
1888                 return ret;
1889         }
1890
1891         /* make sure rfkill handshake bits are cleared */
1892         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1893         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1894                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1895
1896         /* clear (again), then enable host interrupts */
1897         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1898         iwl_enable_interrupts(priv);
1899
1900         /* really make sure rfkill handshake bits are cleared */
1901         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1902         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1903
1904         /* Copy original ucode data image from disk into backup cache.
1905          * This will be used to initialize the on-board processor's
1906          * data SRAM for a clean start when the runtime program first loads. */
1907         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1908                priv->ucode_data.len);
1909
1910         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1911
1912                 iwl_clear_stations_table(priv);
1913
1914                 /* load bootstrap state machine,
1915                  * load bootstrap program into processor's memory,
1916                  * prepare to load the "initialize" uCode */
1917                 ret = priv->cfg->ops->lib->load_ucode(priv);
1918
1919                 if (ret) {
1920                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1921                                 ret);
1922                         continue;
1923                 }
1924
1925                 /* Clear out the uCode error bit if it is set */
1926                 clear_bit(STATUS_FW_ERROR, &priv->status);
1927
1928                 /* start card; "initialize" will load runtime ucode */
1929                 iwl_nic_start(priv);
1930
1931                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1932
1933                 return 0;
1934         }
1935
1936         set_bit(STATUS_EXIT_PENDING, &priv->status);
1937         __iwl_down(priv);
1938         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1939
1940         /* tried to restart and config the device for as long as our
1941          * patience could withstand */
1942         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1943         return -EIO;
1944 }
1945
1946
1947 /*****************************************************************************
1948  *
1949  * Workqueue callbacks
1950  *
1951  *****************************************************************************/
1952
1953 static void iwl_bg_init_alive_start(struct work_struct *data)
1954 {
1955         struct iwl_priv *priv =
1956             container_of(data, struct iwl_priv, init_alive_start.work);
1957
1958         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1959                 return;
1960
1961         mutex_lock(&priv->mutex);
1962         priv->cfg->ops->lib->init_alive_start(priv);
1963         mutex_unlock(&priv->mutex);
1964 }
1965
1966 static void iwl_bg_alive_start(struct work_struct *data)
1967 {
1968         struct iwl_priv *priv =
1969             container_of(data, struct iwl_priv, alive_start.work);
1970
1971         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1972                 return;
1973
1974         mutex_lock(&priv->mutex);
1975         iwl_alive_start(priv);
1976         mutex_unlock(&priv->mutex);
1977 }
1978
1979 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1980 {
1981         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1982                         run_time_calib_work);
1983
1984         mutex_lock(&priv->mutex);
1985
1986         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1987             test_bit(STATUS_SCANNING, &priv->status)) {
1988                 mutex_unlock(&priv->mutex);
1989                 return;
1990         }
1991
1992         if (priv->start_calib) {
1993                 iwl_chain_noise_calibration(priv, &priv->statistics);
1994
1995                 iwl_sensitivity_calibration(priv, &priv->statistics);
1996         }
1997
1998         mutex_unlock(&priv->mutex);
1999         return;
2000 }
2001
2002 static void iwl_bg_up(struct work_struct *data)
2003 {
2004         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2005
2006         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2007                 return;
2008
2009         mutex_lock(&priv->mutex);
2010         __iwl_up(priv);
2011         mutex_unlock(&priv->mutex);
2012         iwl_rfkill_set_hw_state(priv);
2013 }
2014
2015 static void iwl_bg_restart(struct work_struct *data)
2016 {
2017         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2018
2019         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2020                 return;
2021
2022         iwl_down(priv);
2023         queue_work(priv->workqueue, &priv->up);
2024 }
2025
2026 static void iwl_bg_rx_replenish(struct work_struct *data)
2027 {
2028         struct iwl_priv *priv =
2029             container_of(data, struct iwl_priv, rx_replenish);
2030
2031         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2032                 return;
2033
2034         mutex_lock(&priv->mutex);
2035         iwl_rx_replenish(priv);
2036         mutex_unlock(&priv->mutex);
2037 }
2038
2039 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2040
2041 static void iwl_post_associate(struct iwl_priv *priv)
2042 {
2043         struct ieee80211_conf *conf = NULL;
2044         int ret = 0;
2045         unsigned long flags;
2046
2047         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2048                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2049                 return;
2050         }
2051
2052         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2053                         priv->assoc_id, priv->active_rxon.bssid_addr);
2054
2055
2056         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2057                 return;
2058
2059
2060         if (!priv->vif || !priv->is_open)
2061                 return;
2062
2063         iwl_power_cancel_timeout(priv);
2064         iwl_scan_cancel_timeout(priv, 200);
2065
2066         conf = ieee80211_get_hw_conf(priv->hw);
2067
2068         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2069         iwl_commit_rxon(priv);
2070
2071         iwl_setup_rxon_timing(priv);
2072         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2073                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2074         if (ret)
2075                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2076                             "Attempting to continue.\n");
2077
2078         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2079
2080         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2081
2082         iwl_set_rxon_chain(priv);
2083         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2084
2085         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2086                         priv->assoc_id, priv->beacon_int);
2087
2088         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2089                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2090         else
2091                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2092
2093         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2094                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2095                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2096                 else
2097                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2098
2099                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2100                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2101
2102         }
2103
2104         iwl_commit_rxon(priv);
2105
2106         switch (priv->iw_mode) {
2107         case NL80211_IFTYPE_STATION:
2108                 break;
2109
2110         case NL80211_IFTYPE_ADHOC:
2111
2112                 /* assume default assoc id */
2113                 priv->assoc_id = 1;
2114
2115                 iwl_rxon_add_station(priv, priv->bssid, 0);
2116                 iwl_send_beacon_cmd(priv);
2117
2118                 break;
2119
2120         default:
2121                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2122                           __func__, priv->iw_mode);
2123                 break;
2124         }
2125
2126         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2127                 priv->assoc_station_added = 1;
2128
2129         spin_lock_irqsave(&priv->lock, flags);
2130         iwl_activate_qos(priv, 0);
2131         spin_unlock_irqrestore(&priv->lock, flags);
2132
2133         /* the chain noise calibration will enabled PM upon completion
2134          * If chain noise has already been run, then we need to enable
2135          * power management here */
2136         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2137                 iwl_power_enable_management(priv);
2138
2139         /* Enable Rx differential gain and sensitivity calibrations */
2140         iwl_chain_noise_reset(priv);
2141         priv->start_calib = 1;
2142
2143 }
2144
2145 /*****************************************************************************
2146  *
2147  * mac80211 entry point functions
2148  *
2149  *****************************************************************************/
2150
2151 #define UCODE_READY_TIMEOUT     (4 * HZ)
2152
2153 static int iwl_mac_start(struct ieee80211_hw *hw)
2154 {
2155         struct iwl_priv *priv = hw->priv;
2156         int ret;
2157
2158         IWL_DEBUG_MAC80211(priv, "enter\n");
2159
2160         /* we should be verifying the device is ready to be opened */
2161         mutex_lock(&priv->mutex);
2162
2163         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2164         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2165          * ucode filename and max sizes are card-specific. */
2166
2167         if (!priv->ucode_code.len) {
2168                 ret = iwl_read_ucode(priv);
2169                 if (ret) {
2170                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2171                         mutex_unlock(&priv->mutex);
2172                         return ret;
2173                 }
2174         }
2175
2176         ret = __iwl_up(priv);
2177
2178         mutex_unlock(&priv->mutex);
2179
2180         iwl_rfkill_set_hw_state(priv);
2181
2182         if (ret)
2183                 return ret;
2184
2185         if (iwl_is_rfkill(priv))
2186                 goto out;
2187
2188         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2189
2190         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2191                 return 0;
2192
2193         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2194          * mac80211 will not be run successfully. */
2195         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2196                         test_bit(STATUS_READY, &priv->status),
2197                         UCODE_READY_TIMEOUT);
2198         if (!ret) {
2199                 if (!test_bit(STATUS_READY, &priv->status)) {
2200                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2201                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2202                         return -ETIMEDOUT;
2203                 }
2204         }
2205
2206 out:
2207         priv->is_open = 1;
2208         IWL_DEBUG_MAC80211(priv, "leave\n");
2209         return 0;
2210 }
2211
2212 static void iwl_mac_stop(struct ieee80211_hw *hw)
2213 {
2214         struct iwl_priv *priv = hw->priv;
2215
2216         IWL_DEBUG_MAC80211(priv, "enter\n");
2217
2218         if (!priv->is_open) {
2219                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2220                 return;
2221         }
2222
2223         priv->is_open = 0;
2224
2225         if (iwl_is_ready_rf(priv)) {
2226                 /* stop mac, cancel any scan request and clear
2227                  * RXON_FILTER_ASSOC_MSK BIT
2228                  */
2229                 mutex_lock(&priv->mutex);
2230                 iwl_scan_cancel_timeout(priv, 100);
2231                 mutex_unlock(&priv->mutex);
2232         }
2233
2234         iwl_down(priv);
2235
2236         flush_workqueue(priv->workqueue);
2237
2238         /* enable interrupts again in order to receive rfkill changes */
2239         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2240         iwl_enable_interrupts(priv);
2241
2242         IWL_DEBUG_MAC80211(priv, "leave\n");
2243 }
2244
2245 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2246 {
2247         struct iwl_priv *priv = hw->priv;
2248
2249         IWL_DEBUG_MACDUMP(priv, "enter\n");
2250
2251         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2252                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2253
2254         if (iwl_tx_skb(priv, skb))
2255                 dev_kfree_skb_any(skb);
2256
2257         IWL_DEBUG_MACDUMP(priv, "leave\n");
2258         return NETDEV_TX_OK;
2259 }
2260
2261 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2262                                  struct ieee80211_if_init_conf *conf)
2263 {
2264         struct iwl_priv *priv = hw->priv;
2265         unsigned long flags;
2266
2267         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2268
2269         if (priv->vif) {
2270                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2271                 return -EOPNOTSUPP;
2272         }
2273
2274         spin_lock_irqsave(&priv->lock, flags);
2275         priv->vif = conf->vif;
2276         priv->iw_mode = conf->type;
2277
2278         spin_unlock_irqrestore(&priv->lock, flags);
2279
2280         mutex_lock(&priv->mutex);
2281
2282         if (conf->mac_addr) {
2283                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2284                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2285         }
2286
2287         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2288                 /* we are not ready, will run again when ready */
2289                 set_bit(STATUS_MODE_PENDING, &priv->status);
2290
2291         mutex_unlock(&priv->mutex);
2292
2293         IWL_DEBUG_MAC80211(priv, "leave\n");
2294         return 0;
2295 }
2296
2297 /**
2298  * iwl_mac_config - mac80211 config callback
2299  *
2300  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2301  * be set inappropriately and the driver currently sets the hardware up to
2302  * use it whenever needed.
2303  */
2304 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2305 {
2306         struct iwl_priv *priv = hw->priv;
2307         const struct iwl_channel_info *ch_info;
2308         struct ieee80211_conf *conf = &hw->conf;
2309         unsigned long flags;
2310         int ret = 0;
2311         u16 channel;
2312
2313         mutex_lock(&priv->mutex);
2314         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n", conf->channel->hw_value);
2315
2316         priv->current_ht_config.is_ht = conf_is_ht(conf);
2317
2318         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2319                 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
2320                 goto out;
2321         }
2322
2323         if (!conf->radio_enabled)
2324                 iwl_radio_kill_sw_disable_radio(priv);
2325
2326         if (!iwl_is_ready(priv)) {
2327                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2328                 ret = -EIO;
2329                 goto out;
2330         }
2331
2332         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2333                      test_bit(STATUS_SCANNING, &priv->status))) {
2334                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2335                 mutex_unlock(&priv->mutex);
2336                 return 0;
2337         }
2338
2339         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2340         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2341         if (!is_channel_valid(ch_info)) {
2342                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2343                 ret = -EINVAL;
2344                 goto out;
2345         }
2346
2347         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2348             !is_channel_ibss(ch_info)) {
2349                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2350                         conf->channel->hw_value, conf->channel->band);
2351                 ret = -EINVAL;
2352                 goto out;
2353         }
2354
2355         spin_lock_irqsave(&priv->lock, flags);
2356
2357
2358         /* if we are switching from ht to 2.4 clear flags
2359          * from any ht related info since 2.4 does not
2360          * support ht */
2361         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2362 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2363             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2364 #endif
2365         )
2366                 priv->staging_rxon.flags = 0;
2367
2368         iwl_set_rxon_channel(priv, conf->channel);
2369
2370         iwl_set_flags_for_band(priv, conf->channel->band);
2371
2372         /* The list of supported rates and rate mask can be different
2373          * for each band; since the band may have changed, reset
2374          * the rate mask to what mac80211 lists */
2375         iwl_set_rate(priv);
2376
2377         spin_unlock_irqrestore(&priv->lock, flags);
2378
2379 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2380         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2381                 iwl_hw_channel_switch(priv, conf->channel);
2382                 goto out;
2383         }
2384 #endif
2385
2386         if (!conf->radio_enabled) {
2387                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2388                 goto out;
2389         }
2390
2391         if (iwl_is_rfkill(priv)) {
2392                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
2393                 ret = -EIO;
2394                 goto out;
2395         }
2396
2397         if (conf->flags & IEEE80211_CONF_PS)
2398                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2399         else
2400                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2401         if (ret)
2402                 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2403
2404         IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2405                            priv->tx_power_user_lmt, conf->power_level);
2406
2407         iwl_set_tx_power(priv, conf->power_level, false);
2408
2409         iwl_set_rate(priv);
2410
2411         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2412         iwl_set_rxon_chain(priv);
2413
2414         if (memcmp(&priv->active_rxon,
2415                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2416                 iwl_commit_rxon(priv);
2417         else
2418                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2419
2420         IWL_DEBUG_MAC80211(priv, "leave\n");
2421
2422 out:
2423         mutex_unlock(&priv->mutex);
2424         return ret;
2425 }
2426
2427 static void iwl_config_ap(struct iwl_priv *priv)
2428 {
2429         int ret = 0;
2430         unsigned long flags;
2431
2432         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2433                 return;
2434
2435         /* The following should be done only at AP bring up */
2436         if (!iwl_is_associated(priv)) {
2437
2438                 /* RXON - unassoc (to set timing command) */
2439                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2440                 iwl_commit_rxon(priv);
2441
2442                 /* RXON Timing */
2443                 iwl_setup_rxon_timing(priv);
2444                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2445                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2446                 if (ret)
2447                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2448                                         "Attempting to continue.\n");
2449
2450                 iwl_set_rxon_chain(priv);
2451
2452                 /* FIXME: what should be the assoc_id for AP? */
2453                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2454                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2455                         priv->staging_rxon.flags |=
2456                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2457                 else
2458                         priv->staging_rxon.flags &=
2459                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2460
2461                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2462                         if (priv->assoc_capability &
2463                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2464                                 priv->staging_rxon.flags |=
2465                                         RXON_FLG_SHORT_SLOT_MSK;
2466                         else
2467                                 priv->staging_rxon.flags &=
2468                                         ~RXON_FLG_SHORT_SLOT_MSK;
2469
2470                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2471                                 priv->staging_rxon.flags &=
2472                                         ~RXON_FLG_SHORT_SLOT_MSK;
2473                 }
2474                 /* restore RXON assoc */
2475                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2476                 iwl_commit_rxon(priv);
2477                 spin_lock_irqsave(&priv->lock, flags);
2478                 iwl_activate_qos(priv, 1);
2479                 spin_unlock_irqrestore(&priv->lock, flags);
2480                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2481         }
2482         iwl_send_beacon_cmd(priv);
2483
2484         /* FIXME - we need to add code here to detect a totally new
2485          * configuration, reset the AP, unassoc, rxon timing, assoc,
2486          * clear sta table, add BCAST sta... */
2487 }
2488
2489
2490 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2491                                         struct ieee80211_vif *vif,
2492                                     struct ieee80211_if_conf *conf)
2493 {
2494         struct iwl_priv *priv = hw->priv;
2495         int rc;
2496
2497         if (conf == NULL)
2498                 return -EIO;
2499
2500         if (priv->vif != vif) {
2501                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2502                 return 0;
2503         }
2504
2505         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2506             conf->changed & IEEE80211_IFCC_BEACON) {
2507                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2508                 if (!beacon)
2509                         return -ENOMEM;
2510                 mutex_lock(&priv->mutex);
2511                 rc = iwl_mac_beacon_update(hw, beacon);
2512                 mutex_unlock(&priv->mutex);
2513                 if (rc)
2514                         return rc;
2515         }
2516
2517         if (!iwl_is_alive(priv))
2518                 return -EAGAIN;
2519
2520         mutex_lock(&priv->mutex);
2521
2522         if (conf->bssid)
2523                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2524
2525 /*
2526  * very dubious code was here; the probe filtering flag is never set:
2527  *
2528         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2529             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2530  */
2531
2532         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2533                 if (!conf->bssid) {
2534                         conf->bssid = priv->mac_addr;
2535                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2536                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2537                                            conf->bssid);
2538                 }
2539                 if (priv->ibss_beacon)
2540                         dev_kfree_skb(priv->ibss_beacon);
2541
2542                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2543         }
2544
2545         if (iwl_is_rfkill(priv))
2546                 goto done;
2547
2548         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2549             !is_multicast_ether_addr(conf->bssid)) {
2550                 /* If there is currently a HW scan going on in the background
2551                  * then we need to cancel it else the RXON below will fail. */
2552                 if (iwl_scan_cancel_timeout(priv, 100)) {
2553                         IWL_WARN(priv, "Aborted scan still in progress "
2554                                     "after 100ms\n");
2555                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2556                         mutex_unlock(&priv->mutex);
2557                         return -EAGAIN;
2558                 }
2559                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2560
2561                 /* TODO: Audit driver for usage of these members and see
2562                  * if mac80211 deprecates them (priv->bssid looks like it
2563                  * shouldn't be there, but I haven't scanned the IBSS code
2564                  * to verify) - jpk */
2565                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2566
2567                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2568                         iwl_config_ap(priv);
2569                 else {
2570                         rc = iwl_commit_rxon(priv);
2571                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2572                                 iwl_rxon_add_station(
2573                                         priv, priv->active_rxon.bssid_addr, 1);
2574                 }
2575
2576         } else {
2577                 iwl_scan_cancel_timeout(priv, 100);
2578                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2579                 iwl_commit_rxon(priv);
2580         }
2581
2582  done:
2583         IWL_DEBUG_MAC80211(priv, "leave\n");
2584         mutex_unlock(&priv->mutex);
2585
2586         return 0;
2587 }
2588
2589 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2590                                      struct ieee80211_if_init_conf *conf)
2591 {
2592         struct iwl_priv *priv = hw->priv;
2593
2594         IWL_DEBUG_MAC80211(priv, "enter\n");
2595
2596         mutex_lock(&priv->mutex);
2597
2598         if (iwl_is_ready_rf(priv)) {
2599                 iwl_scan_cancel_timeout(priv, 100);
2600                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2601                 iwl_commit_rxon(priv);
2602         }
2603         if (priv->vif == conf->vif) {
2604                 priv->vif = NULL;
2605                 memset(priv->bssid, 0, ETH_ALEN);
2606         }
2607         mutex_unlock(&priv->mutex);
2608
2609         IWL_DEBUG_MAC80211(priv, "leave\n");
2610
2611 }
2612
2613 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2614 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2615                                      struct ieee80211_vif *vif,
2616                                      struct ieee80211_bss_conf *bss_conf,
2617                                      u32 changes)
2618 {
2619         struct iwl_priv *priv = hw->priv;
2620
2621         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2622
2623         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2624                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2625                                    bss_conf->use_short_preamble);
2626                 if (bss_conf->use_short_preamble)
2627                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2628                 else
2629                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2630         }
2631
2632         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2633                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2634                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2635                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2636                 else
2637                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2638         }
2639
2640         if (changes & BSS_CHANGED_HT) {
2641                 iwl_ht_conf(priv, bss_conf);
2642                 iwl_set_rxon_chain(priv);
2643         }
2644
2645         if (changes & BSS_CHANGED_ASSOC) {
2646                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2647                 /* This should never happen as this function should
2648                  * never be called from interrupt context. */
2649                 if (WARN_ON_ONCE(in_interrupt()))
2650                         return;
2651                 if (bss_conf->assoc) {
2652                         priv->assoc_id = bss_conf->aid;
2653                         priv->beacon_int = bss_conf->beacon_int;
2654                         priv->power_data.dtim_period = bss_conf->dtim_period;
2655                         priv->timestamp = bss_conf->timestamp;
2656                         priv->assoc_capability = bss_conf->assoc_capability;
2657
2658                         /* we have just associated, don't start scan too early
2659                          * leave time for EAPOL exchange to complete
2660                          */
2661                         priv->next_scan_jiffies = jiffies +
2662                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2663                         mutex_lock(&priv->mutex);
2664                         iwl_post_associate(priv);
2665                         mutex_unlock(&priv->mutex);
2666                 } else {
2667                         priv->assoc_id = 0;
2668                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2669                 }
2670         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2671                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2672                         iwl_send_rxon_assoc(priv);
2673         }
2674
2675 }
2676
2677 static int iwl_mac_hw_scan(struct ieee80211_hw *hw,
2678                            struct cfg80211_scan_request *req)
2679 {
2680         unsigned long flags;
2681         struct iwl_priv *priv = hw->priv;
2682         int ret;
2683         u8 *ssid = NULL;
2684         size_t ssid_len = 0;
2685
2686         if (req->n_ssids) {
2687                 ssid = req->ssids[0].ssid;
2688                 ssid_len = req->ssids[0].ssid_len;
2689         }
2690
2691         IWL_DEBUG_MAC80211(priv, "enter\n");
2692
2693         mutex_lock(&priv->mutex);
2694         spin_lock_irqsave(&priv->lock, flags);
2695
2696         if (!iwl_is_ready_rf(priv)) {
2697                 ret = -EIO;
2698                 IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
2699                 goto out_unlock;
2700         }
2701
2702         /* We don't schedule scan within next_scan_jiffies period.
2703          * Avoid scanning during possible EAPOL exchange, return
2704          * success immediately.
2705          */
2706         if (priv->next_scan_jiffies &&
2707             time_after(priv->next_scan_jiffies, jiffies)) {
2708                 IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
2709                 queue_work(priv->workqueue, &priv->scan_completed);
2710                 ret = 0;
2711                 goto out_unlock;
2712         }
2713
2714         /* if we just finished scan ask for delay */
2715         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
2716             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
2717                 IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n");
2718                 queue_work(priv->workqueue, &priv->scan_completed);
2719                 ret = 0;
2720                 goto out_unlock;
2721         }
2722
2723         if (ssid_len) {
2724                 priv->one_direct_scan = 1;
2725                 priv->direct_ssid_len = ssid_len;
2726                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
2727         } else {
2728                 priv->one_direct_scan = 0;
2729         }
2730
2731         ret = iwl_scan_initiate(priv);
2732
2733         IWL_DEBUG_MAC80211(priv, "leave\n");
2734
2735 out_unlock:
2736         spin_unlock_irqrestore(&priv->lock, flags);
2737         mutex_unlock(&priv->mutex);
2738
2739         return ret;
2740 }
2741
2742 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2743                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2744                         u32 iv32, u16 *phase1key)
2745 {
2746
2747         struct iwl_priv *priv = hw->priv;
2748         IWL_DEBUG_MAC80211(priv, "enter\n");
2749
2750         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2751
2752         IWL_DEBUG_MAC80211(priv, "leave\n");
2753 }
2754
2755 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2756                            struct ieee80211_vif *vif,
2757                            struct ieee80211_sta *sta,
2758                            struct ieee80211_key_conf *key)
2759 {
2760         struct iwl_priv *priv = hw->priv;
2761         const u8 *addr;
2762         int ret;
2763         u8 sta_id;
2764         bool is_default_wep_key = false;
2765
2766         IWL_DEBUG_MAC80211(priv, "enter\n");
2767
2768         if (priv->hw_params.sw_crypto) {
2769                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2770                 return -EOPNOTSUPP;
2771         }
2772         addr = sta ? sta->addr : iwl_bcast_addr;
2773         sta_id = iwl_find_station(priv, addr);
2774         if (sta_id == IWL_INVALID_STATION) {
2775                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2776                                    addr);
2777                 return -EINVAL;
2778
2779         }
2780
2781         mutex_lock(&priv->mutex);
2782         iwl_scan_cancel_timeout(priv, 100);
2783         mutex_unlock(&priv->mutex);
2784
2785         /* If we are getting WEP group key and we didn't receive any key mapping
2786          * so far, we are in legacy wep mode (group key only), otherwise we are
2787          * in 1X mode.
2788          * In legacy wep mode, we use another host command to the uCode */
2789         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2790                 priv->iw_mode != NL80211_IFTYPE_AP) {
2791                 if (cmd == SET_KEY)
2792                         is_default_wep_key = !priv->key_mapping_key;
2793                 else
2794                         is_default_wep_key =
2795                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2796         }
2797
2798         switch (cmd) {
2799         case SET_KEY:
2800                 if (is_default_wep_key)
2801                         ret = iwl_set_default_wep_key(priv, key);
2802                 else
2803                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2804
2805                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2806                 break;
2807         case DISABLE_KEY:
2808                 if (is_default_wep_key)
2809                         ret = iwl_remove_default_wep_key(priv, key);
2810                 else
2811                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2812
2813                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2814                 break;
2815         default:
2816                 ret = -EINVAL;
2817         }
2818
2819         IWL_DEBUG_MAC80211(priv, "leave\n");
2820
2821         return ret;
2822 }
2823
2824 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2825                            const struct ieee80211_tx_queue_params *params)
2826 {
2827         struct iwl_priv *priv = hw->priv;
2828         unsigned long flags;
2829         int q;
2830
2831         IWL_DEBUG_MAC80211(priv, "enter\n");
2832
2833         if (!iwl_is_ready_rf(priv)) {
2834                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2835                 return -EIO;
2836         }
2837
2838         if (queue >= AC_NUM) {
2839                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2840                 return 0;
2841         }
2842
2843         q = AC_NUM - 1 - queue;
2844
2845         spin_lock_irqsave(&priv->lock, flags);
2846
2847         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2848         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2849         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2850         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2851                         cpu_to_le16((params->txop * 32));
2852
2853         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2854         priv->qos_data.qos_active = 1;
2855
2856         if (priv->iw_mode == NL80211_IFTYPE_AP)
2857                 iwl_activate_qos(priv, 1);
2858         else if (priv->assoc_id && iwl_is_associated(priv))
2859                 iwl_activate_qos(priv, 0);
2860
2861         spin_unlock_irqrestore(&priv->lock, flags);
2862
2863         IWL_DEBUG_MAC80211(priv, "leave\n");
2864         return 0;
2865 }
2866
2867 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2868                              enum ieee80211_ampdu_mlme_action action,
2869                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2870 {
2871         struct iwl_priv *priv = hw->priv;
2872
2873         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2874                      sta->addr, tid);
2875
2876         if (!(priv->cfg->sku & IWL_SKU_N))
2877                 return -EACCES;
2878
2879         switch (action) {
2880         case IEEE80211_AMPDU_RX_START:
2881                 IWL_DEBUG_HT(priv, "start Rx\n");
2882                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2883         case IEEE80211_AMPDU_RX_STOP:
2884                 IWL_DEBUG_HT(priv, "stop Rx\n");
2885                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2886         case IEEE80211_AMPDU_TX_START:
2887                 IWL_DEBUG_HT(priv, "start Tx\n");
2888                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2889         case IEEE80211_AMPDU_TX_STOP:
2890                 IWL_DEBUG_HT(priv, "stop Tx\n");
2891                 return iwl_tx_agg_stop(priv, sta->addr, tid);
2892         default:
2893                 IWL_DEBUG_HT(priv, "unknown\n");
2894                 return -EINVAL;
2895                 break;
2896         }
2897         return 0;
2898 }
2899
2900 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2901                                 struct ieee80211_tx_queue_stats *stats)
2902 {
2903         struct iwl_priv *priv = hw->priv;
2904         int i, avail;
2905         struct iwl_tx_queue *txq;
2906         struct iwl_queue *q;
2907         unsigned long flags;
2908
2909         IWL_DEBUG_MAC80211(priv, "enter\n");
2910
2911         if (!iwl_is_ready_rf(priv)) {
2912                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2913                 return -EIO;
2914         }
2915
2916         spin_lock_irqsave(&priv->lock, flags);
2917
2918         for (i = 0; i < AC_NUM; i++) {
2919                 txq = &priv->txq[i];
2920                 q = &txq->q;
2921                 avail = iwl_queue_space(q);
2922
2923                 stats[i].len = q->n_window - avail;
2924                 stats[i].limit = q->n_window - q->high_mark;
2925                 stats[i].count = q->n_window;
2926
2927         }
2928         spin_unlock_irqrestore(&priv->lock, flags);
2929
2930         IWL_DEBUG_MAC80211(priv, "leave\n");
2931
2932         return 0;
2933 }
2934
2935 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2936                              struct ieee80211_low_level_stats *stats)
2937 {
2938         struct iwl_priv *priv = hw->priv;
2939
2940         priv = hw->priv;
2941         IWL_DEBUG_MAC80211(priv, "enter\n");
2942         IWL_DEBUG_MAC80211(priv, "leave\n");
2943
2944         return 0;
2945 }
2946
2947 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2948 {
2949         struct iwl_priv *priv = hw->priv;
2950         unsigned long flags;
2951
2952         mutex_lock(&priv->mutex);
2953         IWL_DEBUG_MAC80211(priv, "enter\n");
2954
2955         spin_lock_irqsave(&priv->lock, flags);
2956         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2957         spin_unlock_irqrestore(&priv->lock, flags);
2958
2959         iwl_reset_qos(priv);
2960
2961         spin_lock_irqsave(&priv->lock, flags);
2962         priv->assoc_id = 0;
2963         priv->assoc_capability = 0;
2964         priv->assoc_station_added = 0;
2965
2966         /* new association get rid of ibss beacon skb */
2967         if (priv->ibss_beacon)
2968                 dev_kfree_skb(priv->ibss_beacon);
2969
2970         priv->ibss_beacon = NULL;
2971
2972         priv->beacon_int = priv->hw->conf.beacon_int;
2973         priv->timestamp = 0;
2974         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2975                 priv->beacon_int = 0;
2976
2977         spin_unlock_irqrestore(&priv->lock, flags);
2978
2979         if (!iwl_is_ready_rf(priv)) {
2980                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2981                 mutex_unlock(&priv->mutex);
2982                 return;
2983         }
2984
2985         /* we are restarting association process
2986          * clear RXON_FILTER_ASSOC_MSK bit
2987          */
2988         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2989                 iwl_scan_cancel_timeout(priv, 100);
2990                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2991                 iwl_commit_rxon(priv);
2992         }
2993
2994         iwl_power_update_mode(priv, 0);
2995
2996         /* Per mac80211.h: This is only used in IBSS mode... */
2997         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2998
2999                 /* switch to CAM during association period.
3000                  * the ucode will block any association/authentication
3001                  * frome during assiciation period if it can not hear
3002                  * the AP because of PM. the timer enable PM back is
3003                  * association do not complete
3004                  */
3005                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3006                                                      IEEE80211_CHAN_RADAR))
3007                                 iwl_power_disable_management(priv, 3000);
3008
3009                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
3010                 mutex_unlock(&priv->mutex);
3011                 return;
3012         }
3013
3014         iwl_set_rate(priv);
3015
3016         mutex_unlock(&priv->mutex);
3017
3018         IWL_DEBUG_MAC80211(priv, "leave\n");
3019 }
3020
3021 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3022 {
3023         struct iwl_priv *priv = hw->priv;
3024         unsigned long flags;
3025         __le64 timestamp;
3026
3027         IWL_DEBUG_MAC80211(priv, "enter\n");
3028
3029         if (!iwl_is_ready_rf(priv)) {
3030                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
3031                 return -EIO;
3032         }
3033
3034         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3035                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
3036                 return -EIO;
3037         }
3038
3039         spin_lock_irqsave(&priv->lock, flags);
3040
3041         if (priv->ibss_beacon)
3042                 dev_kfree_skb(priv->ibss_beacon);
3043
3044         priv->ibss_beacon = skb;
3045
3046         priv->assoc_id = 0;
3047         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3048         priv->timestamp = le64_to_cpu(timestamp);
3049
3050         IWL_DEBUG_MAC80211(priv, "leave\n");
3051         spin_unlock_irqrestore(&priv->lock, flags);
3052
3053         iwl_reset_qos(priv);
3054
3055         iwl_post_associate(priv);
3056
3057
3058         return 0;
3059 }
3060
3061 /*****************************************************************************
3062  *
3063  * sysfs attributes
3064  *
3065  *****************************************************************************/
3066
3067 #ifdef CONFIG_IWLWIFI_DEBUG
3068
3069 /*
3070  * The following adds a new attribute to the sysfs representation
3071  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3072  * used for controlling the debug level.
3073  *
3074  * See the level definitions in iwl for details.
3075  */
3076
3077 static ssize_t show_debug_level(struct device *d,
3078                                 struct device_attribute *attr, char *buf)
3079 {
3080         struct iwl_priv *priv = d->driver_data;
3081
3082         return sprintf(buf, "0x%08X\n", priv->debug_level);
3083 }
3084 static ssize_t store_debug_level(struct device *d,
3085                                 struct device_attribute *attr,
3086                                  const char *buf, size_t count)
3087 {
3088         struct iwl_priv *priv = d->driver_data;
3089         unsigned long val;
3090         int ret;
3091
3092         ret = strict_strtoul(buf, 0, &val);
3093         if (ret)
3094                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3095         else
3096                 priv->debug_level = val;
3097
3098         return strnlen(buf, count);
3099 }
3100
3101 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3102                         show_debug_level, store_debug_level);
3103
3104
3105 #endif /* CONFIG_IWLWIFI_DEBUG */
3106
3107
3108 static ssize_t show_version(struct device *d,
3109                                 struct device_attribute *attr, char *buf)
3110 {
3111         struct iwl_priv *priv = d->driver_data;
3112         struct iwl_alive_resp *palive = &priv->card_alive;
3113         ssize_t pos = 0;
3114         u16 eeprom_ver;
3115
3116         if (palive->is_valid)
3117                 pos += sprintf(buf + pos,
3118                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3119                                 "fw type: 0x%01X 0x%01X\n",
3120                                 palive->ucode_major, palive->ucode_minor,
3121                                 palive->sw_rev[0], palive->sw_rev[1],
3122                                 palive->ver_type, palive->ver_subtype);
3123         else
3124                 pos += sprintf(buf + pos, "fw not loaded\n");
3125
3126         if (priv->eeprom) {
3127                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3128                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3129                                  eeprom_ver);
3130         } else {
3131                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3132         }
3133
3134         return pos;
3135 }
3136
3137 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3138
3139 static ssize_t show_temperature(struct device *d,
3140                                 struct device_attribute *attr, char *buf)
3141 {
3142         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3143
3144         if (!iwl_is_alive(priv))
3145                 return -EAGAIN;
3146
3147         return sprintf(buf, "%d\n", priv->temperature);
3148 }
3149
3150 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3151
3152 static ssize_t show_tx_power(struct device *d,
3153                              struct device_attribute *attr, char *buf)
3154 {
3155         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3156
3157         if (!iwl_is_ready_rf(priv))
3158                 return sprintf(buf, "off\n");
3159         else
3160                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3161 }
3162
3163 static ssize_t store_tx_power(struct device *d,
3164                               struct device_attribute *attr,
3165                               const char *buf, size_t count)
3166 {
3167         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3168         unsigned long val;
3169         int ret;
3170
3171         ret = strict_strtoul(buf, 10, &val);
3172         if (ret)
3173                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3174         else
3175                 iwl_set_tx_power(priv, val, false);