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