03612b3945910e5b1f6e8b0cfbde4a6a7612f7de
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.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/ieee80211_radiotap.h>
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #define DRV_NAME        "iwl3945"
49
50 #include "iwl-fh.h"
51 #include "iwl-3945-fh.h"
52 #include "iwl-commands.h"
53 #include "iwl-sta.h"
54 #include "iwl-3945.h"
55 #include "iwl-helpers.h"
56 #include "iwl-core.h"
57 #include "iwl-dev.h"
58
59 /*
60  * module name, copyright, version, etc.
61  */
62
63 #define DRV_DESCRIPTION \
64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
65
66 #ifdef CONFIG_IWLWIFI_DEBUG
67 #define VD "d"
68 #else
69 #define VD
70 #endif
71
72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
73 #define VS "s"
74 #else
75 #define VS
76 #endif
77
78 #define IWL39_VERSION "1.2.26k" VD VS
79 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
80 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
81 #define DRV_VERSION     IWL39_VERSION
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88
89  /* module parameters */
90 struct iwl_mod_params iwl3945_mod_params = {
91         .sw_crypto = 1,
92         .restart_fw = 1,
93         /* the rest are 0 by default */
94 };
95
96 /**
97  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
98  * @priv: eeprom and antenna fields are used to determine antenna flags
99  *
100  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
101  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
102  *
103  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
104  * IWL_ANTENNA_MAIN      - Force MAIN antenna
105  * IWL_ANTENNA_AUX       - Force AUX antenna
106  */
107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
108 {
109         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
110
111         switch (iwl3945_mod_params.antenna) {
112         case IWL_ANTENNA_DIVERSITY:
113                 return 0;
114
115         case IWL_ANTENNA_MAIN:
116                 if (eeprom->antenna_switch_type)
117                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
118                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
119
120         case IWL_ANTENNA_AUX:
121                 if (eeprom->antenna_switch_type)
122                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
123                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
124         }
125
126         /* bad antenna selector value */
127         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
128                 iwl3945_mod_params.antenna);
129
130         return 0;               /* "diversity" is default if error */
131 }
132
133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
134                                    struct ieee80211_key_conf *keyconf,
135                                    u8 sta_id)
136 {
137         unsigned long flags;
138         __le16 key_flags = 0;
139         int ret;
140
141         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
142         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
143
144         if (sta_id == priv->hw_params.bcast_sta_id)
145                 key_flags |= STA_KEY_MULTICAST_MSK;
146
147         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
148         keyconf->hw_key_idx = keyconf->keyidx;
149         key_flags &= ~STA_KEY_FLG_INVALID;
150
151         spin_lock_irqsave(&priv->sta_lock, flags);
152         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
153         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
154         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
155                keyconf->keylen);
156
157         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
158                keyconf->keylen);
159
160         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
161                         == STA_KEY_FLG_NO_ENC)
162                 priv->stations[sta_id].sta.key.key_offset =
163                                  iwl_get_free_ucode_key_index(priv);
164         /* else, we are overriding an existing key => no need to allocated room
165         * in uCode. */
166
167         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
168                 "no space for a new key");
169
170         priv->stations[sta_id].sta.key.key_flags = key_flags;
171         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
172         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
173
174         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
175
176         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
177
178         spin_unlock_irqrestore(&priv->sta_lock, flags);
179
180         return ret;
181 }
182
183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
184                                   struct ieee80211_key_conf *keyconf,
185                                   u8 sta_id)
186 {
187         return -EOPNOTSUPP;
188 }
189
190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
191                                   struct ieee80211_key_conf *keyconf,
192                                   u8 sta_id)
193 {
194         return -EOPNOTSUPP;
195 }
196
197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
198 {
199         unsigned long flags;
200
201         spin_lock_irqsave(&priv->sta_lock, flags);
202         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
203         memset(&priv->stations[sta_id].sta.key, 0,
204                 sizeof(struct iwl4965_keyinfo));
205         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
206         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
208         spin_unlock_irqrestore(&priv->sta_lock, flags);
209
210         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
211         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
212         return 0;
213 }
214
215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
217 {
218         int ret = 0;
219
220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
221
222         switch (keyconf->alg) {
223         case ALG_CCMP:
224                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
225                 break;
226         case ALG_TKIP:
227                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
228                 break;
229         case ALG_WEP:
230                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
231                 break;
232         default:
233                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
234                 ret = -EINVAL;
235         }
236
237         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
238                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
239                       sta_id, ret);
240
241         return ret;
242 }
243
244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
245 {
246         int ret = -EOPNOTSUPP;
247
248         return ret;
249 }
250
251 static int iwl3945_set_static_key(struct iwl_priv *priv,
252                                 struct ieee80211_key_conf *key)
253 {
254         if (key->alg == ALG_WEP)
255                 return -EOPNOTSUPP;
256
257         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
258         return -EINVAL;
259 }
260
261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
262 {
263         struct list_head *element;
264
265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
266                        priv->frames_count);
267
268         while (!list_empty(&priv->free_frames)) {
269                 element = priv->free_frames.next;
270                 list_del(element);
271                 kfree(list_entry(element, struct iwl3945_frame, list));
272                 priv->frames_count--;
273         }
274
275         if (priv->frames_count) {
276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
277                             priv->frames_count);
278                 priv->frames_count = 0;
279         }
280 }
281
282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
283 {
284         struct iwl3945_frame *frame;
285         struct list_head *element;
286         if (list_empty(&priv->free_frames)) {
287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
288                 if (!frame) {
289                         IWL_ERR(priv, "Could not allocate frame!\n");
290                         return NULL;
291                 }
292
293                 priv->frames_count++;
294                 return frame;
295         }
296
297         element = priv->free_frames.next;
298         list_del(element);
299         return list_entry(element, struct iwl3945_frame, list);
300 }
301
302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
303 {
304         memset(frame, 0, sizeof(*frame));
305         list_add(&frame->list, &priv->free_frames);
306 }
307
308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
309                                 struct ieee80211_hdr *hdr,
310                                 int left)
311 {
312
313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
315              (priv->iw_mode != NL80211_IFTYPE_AP)))
316                 return 0;
317
318         if (priv->ibss_beacon->len > left)
319                 return 0;
320
321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
322
323         return priv->ibss_beacon->len;
324 }
325
326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
327 {
328         struct iwl3945_frame *frame;
329         unsigned int frame_size;
330         int rc;
331         u8 rate;
332
333         frame = iwl3945_get_free_frame(priv);
334
335         if (!frame) {
336                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
337                           "command.\n");
338                 return -ENOMEM;
339         }
340
341         rate = iwl_rate_get_lowest_plcp(priv);
342
343         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
344
345         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
346                               &frame->u.cmd[0]);
347
348         iwl3945_free_frame(priv, frame);
349
350         return rc;
351 }
352
353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
354 {
355         if (priv->shared_virt)
356                 pci_free_consistent(priv->pci_dev,
357                                     sizeof(struct iwl3945_shared),
358                                     priv->shared_virt,
359                                     priv->shared_phys);
360 }
361
362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
363                                       struct ieee80211_tx_info *info,
364                                       struct iwl_device_cmd *cmd,
365                                       struct sk_buff *skb_frag,
366                                       int sta_id)
367 {
368         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
369         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
370
371         switch (keyinfo->alg) {
372         case ALG_CCMP:
373                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
374                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
375                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
376                 break;
377
378         case ALG_TKIP:
379                 break;
380
381         case ALG_WEP:
382                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
383                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
384
385                 if (keyinfo->keylen == 13)
386                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
387
388                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
389
390                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
391                              "with key %d\n", info->control.hw_key->hw_key_idx);
392                 break;
393
394         default:
395                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
396                 break;
397         }
398 }
399
400 /*
401  * handle build REPLY_TX command notification.
402  */
403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
404                                   struct iwl_device_cmd *cmd,
405                                   struct ieee80211_tx_info *info,
406                                   struct ieee80211_hdr *hdr, u8 std_id)
407 {
408         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
409         __le32 tx_flags = tx_cmd->tx_flags;
410         __le16 fc = hdr->frame_control;
411
412         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
413         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
414                 tx_flags |= TX_CMD_FLG_ACK_MSK;
415                 if (ieee80211_is_mgmt(fc))
416                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
417                 if (ieee80211_is_probe_resp(fc) &&
418                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
419                         tx_flags |= TX_CMD_FLG_TSF_MSK;
420         } else {
421                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
422                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
423         }
424
425         tx_cmd->sta_id = std_id;
426         if (ieee80211_has_morefrags(fc))
427                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
428
429         if (ieee80211_is_data_qos(fc)) {
430                 u8 *qc = ieee80211_get_qos_ctl(hdr);
431                 tx_cmd->tid_tspec = qc[0] & 0xf;
432                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
433         } else {
434                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
435         }
436
437         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
438
439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
441
442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
443         if (ieee80211_is_mgmt(fc)) {
444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
446                 else
447                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
448         } else {
449                 tx_cmd->timeout.pm_frame_timeout = 0;
450         }
451
452         tx_cmd->driver_txop = 0;
453         tx_cmd->tx_flags = tx_flags;
454         tx_cmd->next_frame_len = 0;
455 }
456
457 /*
458  * start REPLY_TX command process
459  */
460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
461 {
462         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
463         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
464         struct iwl3945_tx_cmd *tx_cmd;
465         struct iwl_tx_queue *txq = NULL;
466         struct iwl_queue *q = NULL;
467         struct iwl_device_cmd *out_cmd;
468         struct iwl_cmd_meta *out_meta;
469         dma_addr_t phys_addr;
470         dma_addr_t txcmd_phys;
471         int txq_id = skb_get_queue_mapping(skb);
472         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
473         u8 id;
474         u8 unicast;
475         u8 sta_id;
476         u8 tid = 0;
477         u16 seq_number = 0;
478         __le16 fc;
479         u8 wait_write_ptr = 0;
480         u8 *qc = NULL;
481         unsigned long flags;
482         int rc;
483
484         spin_lock_irqsave(&priv->lock, flags);
485         if (iwl_is_rfkill(priv)) {
486                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
487                 goto drop_unlock;
488         }
489
490         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
491                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
492                 goto drop_unlock;
493         }
494
495         unicast = !is_multicast_ether_addr(hdr->addr1);
496         id = 0;
497
498         fc = hdr->frame_control;
499
500 #ifdef CONFIG_IWLWIFI_DEBUG
501         if (ieee80211_is_auth(fc))
502                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
503         else if (ieee80211_is_assoc_req(fc))
504                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
505         else if (ieee80211_is_reassoc_req(fc))
506                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
507 #endif
508
509         /* drop all non-injected data frame if we are not associated */
510         if (ieee80211_is_data(fc) &&
511             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
512             (!iwl_is_associated(priv) ||
513              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
514                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
515                 goto drop_unlock;
516         }
517
518         spin_unlock_irqrestore(&priv->lock, flags);
519
520         hdr_len = ieee80211_hdrlen(fc);
521
522         /* Find (or create) index into station table for destination station */
523         if (info->flags & IEEE80211_TX_CTL_INJECTED)
524                 sta_id = priv->hw_params.bcast_sta_id;
525         else
526                 sta_id = iwl_get_sta_id(priv, hdr);
527         if (sta_id == IWL_INVALID_STATION) {
528                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
529                                hdr->addr1);
530                 goto drop;
531         }
532
533         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
534
535         if (ieee80211_is_data_qos(fc)) {
536                 qc = ieee80211_get_qos_ctl(hdr);
537                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
538                 if (unlikely(tid >= MAX_TID_COUNT))
539                         goto drop;
540                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
541                                 IEEE80211_SCTL_SEQ;
542                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
543                         (hdr->seq_ctrl &
544                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
545                 seq_number += 0x10;
546         }
547
548         /* Descriptor for chosen Tx queue */
549         txq = &priv->txq[txq_id];
550         q = &txq->q;
551
552         spin_lock_irqsave(&priv->lock, flags);
553
554         idx = get_cmd_index(q, q->write_ptr, 0);
555
556         /* Set up driver data for this TFD */
557         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
558         txq->txb[q->write_ptr].skb[0] = skb;
559
560         /* Init first empty entry in queue's array of Tx/cmd buffers */
561         out_cmd = txq->cmd[idx];
562         out_meta = &txq->meta[idx];
563         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
564         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
565         memset(tx_cmd, 0, sizeof(*tx_cmd));
566
567         /*
568          * Set up the Tx-command (not MAC!) header.
569          * Store the chosen Tx queue and TFD index within the sequence field;
570          * after Tx, uCode's Tx response will return this value so driver can
571          * locate the frame within the tx queue and do post-tx processing.
572          */
573         out_cmd->hdr.cmd = REPLY_TX;
574         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
575                                 INDEX_TO_SEQ(q->write_ptr)));
576
577         /* Copy MAC header from skb into command buffer */
578         memcpy(tx_cmd->hdr, hdr, hdr_len);
579
580
581         if (info->control.hw_key)
582                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
583
584         /* TODO need this for burst mode later on */
585         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
586
587         /* set is_hcca to 0; it probably will never be implemented */
588         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
589
590         /* Total # bytes to be transmitted */
591         len = (u16)skb->len;
592         tx_cmd->len = cpu_to_le16(len);
593
594         iwl_dbg_log_tx_data_frame(priv, len, hdr);
595         iwl_update_stats(priv, true, fc, len);
596         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
597         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
598
599         if (!ieee80211_has_morefrags(hdr->frame_control)) {
600                 txq->need_update = 1;
601                 if (qc)
602                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
603         } else {
604                 wait_write_ptr = 1;
605                 txq->need_update = 0;
606         }
607
608         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
609                      le16_to_cpu(out_cmd->hdr.sequence));
610         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
611         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
612         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
613                            ieee80211_hdrlen(fc));
614
615         /*
616          * Use the first empty entry in this queue's command buffer array
617          * to contain the Tx command and MAC header concatenated together
618          * (payload data will be in another buffer).
619          * Size of this varies, due to varying MAC header length.
620          * If end is not dword aligned, we'll have 2 extra bytes at the end
621          * of the MAC header (device reads on dword boundaries).
622          * We'll tell device about this padding later.
623          */
624         len = sizeof(struct iwl3945_tx_cmd) +
625                         sizeof(struct iwl_cmd_header) + hdr_len;
626
627         len_org = len;
628         len = (len + 3) & ~3;
629
630         if (len_org != len)
631                 len_org = 1;
632         else
633                 len_org = 0;
634
635         /* Physical address of this Tx command's header (not MAC header!),
636          * within command buffer array. */
637         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
638                                     len, PCI_DMA_TODEVICE);
639         /* we do not map meta data ... so we can safely access address to
640          * provide to unmap command*/
641         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
642         pci_unmap_len_set(out_meta, len, len);
643
644         /* Add buffer containing Tx command and MAC(!) header to TFD's
645          * first entry */
646         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
647                                                    txcmd_phys, len, 1, 0);
648
649
650         /* Set up TFD's 2nd entry to point directly to remainder of skb,
651          * if any (802.11 null frames have no payload). */
652         len = skb->len - hdr_len;
653         if (len) {
654                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
655                                            len, PCI_DMA_TODEVICE);
656                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
657                                                            phys_addr, len,
658                                                            0, U32_PAD(len));
659         }
660
661
662         /* Tell device the write index *just past* this latest filled TFD */
663         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
664         rc = iwl_txq_update_write_ptr(priv, txq);
665         spin_unlock_irqrestore(&priv->lock, flags);
666
667         if (rc)
668                 return rc;
669
670         if ((iwl_queue_space(q) < q->high_mark)
671             && priv->mac80211_registered) {
672                 if (wait_write_ptr) {
673                         spin_lock_irqsave(&priv->lock, flags);
674                         txq->need_update = 1;
675                         iwl_txq_update_write_ptr(priv, txq);
676                         spin_unlock_irqrestore(&priv->lock, flags);
677                 }
678
679                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
680         }
681
682         return 0;
683
684 drop_unlock:
685         spin_unlock_irqrestore(&priv->lock, flags);
686 drop:
687         return -1;
688 }
689
690 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
691
692 #include "iwl-spectrum.h"
693
694 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
695 #define BEACON_TIME_MASK_HIGH   0xFF000000
696 #define TIME_UNIT               1024
697
698 /*
699  * extended beacon time format
700  * time in usec will be changed into a 32-bit value in 8:24 format
701  * the high 1 byte is the beacon counts
702  * the lower 3 bytes is the time in usec within one beacon interval
703  */
704
705 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
706 {
707         u32 quot;
708         u32 rem;
709         u32 interval = beacon_interval * 1024;
710
711         if (!interval || !usec)
712                 return 0;
713
714         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
715         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
716
717         return (quot << 24) + rem;
718 }
719
720 /* base is usually what we get from ucode with each received frame,
721  * the same as HW timer counter counting down
722  */
723
724 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
725 {
726         u32 base_low = base & BEACON_TIME_MASK_LOW;
727         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
728         u32 interval = beacon_interval * TIME_UNIT;
729         u32 res = (base & BEACON_TIME_MASK_HIGH) +
730             (addon & BEACON_TIME_MASK_HIGH);
731
732         if (base_low > addon_low)
733                 res += base_low - addon_low;
734         else if (base_low < addon_low) {
735                 res += interval + base_low - addon_low;
736                 res += (1 << 24);
737         } else
738                 res += (1 << 24);
739
740         return cpu_to_le32(res);
741 }
742
743 static int iwl3945_get_measurement(struct iwl_priv *priv,
744                                struct ieee80211_measurement_params *params,
745                                u8 type)
746 {
747         struct iwl_spectrum_cmd spectrum;
748         struct iwl_rx_packet *res;
749         struct iwl_host_cmd cmd = {
750                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
751                 .data = (void *)&spectrum,
752                 .flags = CMD_WANT_SKB,
753         };
754         u32 add_time = le64_to_cpu(params->start_time);
755         int rc;
756         int spectrum_resp_status;
757         int duration = le16_to_cpu(params->duration);
758
759         if (iwl_is_associated(priv))
760                 add_time =
761                     iwl3945_usecs_to_beacons(
762                         le64_to_cpu(params->start_time) - priv->last_tsf,
763                         le16_to_cpu(priv->rxon_timing.beacon_interval));
764
765         memset(&spectrum, 0, sizeof(spectrum));
766
767         spectrum.channel_count = cpu_to_le16(1);
768         spectrum.flags =
769             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
770         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
771         cmd.len = sizeof(spectrum);
772         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
773
774         if (iwl_is_associated(priv))
775                 spectrum.start_time =
776                     iwl3945_add_beacon_time(priv->last_beacon_time,
777                                 add_time,
778                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
779         else
780                 spectrum.start_time = 0;
781
782         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
783         spectrum.channels[0].channel = params->channel;
784         spectrum.channels[0].type = type;
785         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
786                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
787                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
788
789         rc = iwl_send_cmd_sync(priv, &cmd);
790         if (rc)
791                 return rc;
792
793         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
794         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
795                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
796                 rc = -EIO;
797         }
798
799         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
800         switch (spectrum_resp_status) {
801         case 0:         /* Command will be handled */
802                 if (res->u.spectrum.id != 0xff) {
803                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
804                                                 res->u.spectrum.id);
805                         priv->measurement_status &= ~MEASUREMENT_READY;
806                 }
807                 priv->measurement_status |= MEASUREMENT_ACTIVE;
808                 rc = 0;
809                 break;
810
811         case 1:         /* Command will not be handled */
812                 rc = -EAGAIN;
813                 break;
814         }
815
816         dev_kfree_skb_any(cmd.reply_skb);
817
818         return rc;
819 }
820 #endif
821
822 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
823                                struct iwl_rx_mem_buffer *rxb)
824 {
825         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
826         struct iwl_alive_resp *palive;
827         struct delayed_work *pwork;
828
829         palive = &pkt->u.alive_frame;
830
831         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
832                        "0x%01X 0x%01X\n",
833                        palive->is_valid, palive->ver_type,
834                        palive->ver_subtype);
835
836         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
837                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
838                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
839                        sizeof(struct iwl_alive_resp));
840                 pwork = &priv->init_alive_start;
841         } else {
842                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
843                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
844                        sizeof(struct iwl_alive_resp));
845                 pwork = &priv->alive_start;
846                 iwl3945_disable_events(priv);
847         }
848
849         /* We delay the ALIVE response by 5ms to
850          * give the HW RF Kill time to activate... */
851         if (palive->is_valid == UCODE_VALID_OK)
852                 queue_delayed_work(priv->workqueue, pwork,
853                                    msecs_to_jiffies(5));
854         else
855                 IWL_WARN(priv, "uCode did not respond OK.\n");
856 }
857
858 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
859                                  struct iwl_rx_mem_buffer *rxb)
860 {
861 #ifdef CONFIG_IWLWIFI_DEBUG
862         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
863 #endif
864
865         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
866         return;
867 }
868
869 static void iwl3945_bg_beacon_update(struct work_struct *work)
870 {
871         struct iwl_priv *priv =
872                 container_of(work, struct iwl_priv, beacon_update);
873         struct sk_buff *beacon;
874
875         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
876         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
877
878         if (!beacon) {
879                 IWL_ERR(priv, "update beacon failed\n");
880                 return;
881         }
882
883         mutex_lock(&priv->mutex);
884         /* new beacon skb is allocated every time; dispose previous.*/
885         if (priv->ibss_beacon)
886                 dev_kfree_skb(priv->ibss_beacon);
887
888         priv->ibss_beacon = beacon;
889         mutex_unlock(&priv->mutex);
890
891         iwl3945_send_beacon_cmd(priv);
892 }
893
894 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
895                                 struct iwl_rx_mem_buffer *rxb)
896 {
897 #ifdef CONFIG_IWLWIFI_DEBUG
898         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
899         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
900         u8 rate = beacon->beacon_notify_hdr.rate;
901
902         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
903                 "tsf %d %d rate %d\n",
904                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
905                 beacon->beacon_notify_hdr.failure_frame,
906                 le32_to_cpu(beacon->ibss_mgr_status),
907                 le32_to_cpu(beacon->high_tsf),
908                 le32_to_cpu(beacon->low_tsf), rate);
909 #endif
910
911         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
912             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
913                 queue_work(priv->workqueue, &priv->beacon_update);
914 }
915
916 /* Handle notification from uCode that card's power state is changing
917  * due to software, hardware, or critical temperature RFKILL */
918 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
919                                     struct iwl_rx_mem_buffer *rxb)
920 {
921         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
922         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
923         unsigned long status = priv->status;
924
925         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
926                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
927                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
928
929         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
930                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
931
932         if (flags & HW_CARD_DISABLED)
933                 set_bit(STATUS_RF_KILL_HW, &priv->status);
934         else
935                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
936
937
938         iwl_scan_cancel(priv);
939
940         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
941              test_bit(STATUS_RF_KILL_HW, &priv->status)))
942                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
943                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
944         else
945                 wake_up_interruptible(&priv->wait_command_queue);
946 }
947
948 /**
949  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
950  *
951  * Setup the RX handlers for each of the reply types sent from the uCode
952  * to the host.
953  *
954  * This function chains into the hardware specific files for them to setup
955  * any hardware specific handlers as well.
956  */
957 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
958 {
959         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
960         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
961         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
962         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
963         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
964         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
965             iwl_rx_pm_debug_statistics_notif;
966         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
967
968         /*
969          * The same handler is used for both the REPLY to a discrete
970          * statistics request from the host as well as for the periodic
971          * statistics notifications (after received beacons) from the uCode.
972          */
973         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
974         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
975
976         iwl_setup_spectrum_handlers(priv);
977         iwl_setup_rx_scan_handlers(priv);
978         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
979
980         /* Set up hardware specific Rx handlers */
981         iwl3945_hw_rx_handler_setup(priv);
982 }
983
984 /************************** RX-FUNCTIONS ****************************/
985 /*
986  * Rx theory of operation
987  *
988  * The host allocates 32 DMA target addresses and passes the host address
989  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
990  * 0 to 31
991  *
992  * Rx Queue Indexes
993  * The host/firmware share two index registers for managing the Rx buffers.
994  *
995  * The READ index maps to the first position that the firmware may be writing
996  * to -- the driver can read up to (but not including) this position and get
997  * good data.
998  * The READ index is managed by the firmware once the card is enabled.
999  *
1000  * The WRITE index maps to the last position the driver has read from -- the
1001  * position preceding WRITE is the last slot the firmware can place a packet.
1002  *
1003  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1004  * WRITE = READ.
1005  *
1006  * During initialization, the host sets up the READ queue position to the first
1007  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1008  *
1009  * When the firmware places a packet in a buffer, it will advance the READ index
1010  * and fire the RX interrupt.  The driver can then query the READ index and
1011  * process as many packets as possible, moving the WRITE index forward as it
1012  * resets the Rx queue buffers with new memory.
1013  *
1014  * The management in the driver is as follows:
1015  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1016  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1017  *   to replenish the iwl->rxq->rx_free.
1018  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1019  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1020  *   'processed' and 'read' driver indexes as well)
1021  * + A received packet is processed and handed to the kernel network stack,
1022  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1023  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1024  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1025  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1026  *   were enough free buffers and RX_STALLED is set it is cleared.
1027  *
1028  *
1029  * Driver sequence:
1030  *
1031  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1032  *                            iwl3945_rx_queue_restock
1033  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1034  *                            queue, updates firmware pointers, and updates
1035  *                            the WRITE index.  If insufficient rx_free buffers
1036  *                            are available, schedules iwl3945_rx_replenish
1037  *
1038  * -- enable interrupts --
1039  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1040  *                            READ INDEX, detaching the SKB from the pool.
1041  *                            Moves the packet buffer from queue to rx_used.
1042  *                            Calls iwl3945_rx_queue_restock to refill any empty
1043  *                            slots.
1044  * ...
1045  *
1046  */
1047
1048 /**
1049  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1050  */
1051 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1052                                           dma_addr_t dma_addr)
1053 {
1054         return cpu_to_le32((u32)dma_addr);
1055 }
1056
1057 /**
1058  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1059  *
1060  * If there are slots in the RX queue that need to be restocked,
1061  * and we have free pre-allocated buffers, fill the ranks as much
1062  * as we can, pulling from rx_free.
1063  *
1064  * This moves the 'write' index forward to catch up with 'processed', and
1065  * also updates the memory address in the firmware to reference the new
1066  * target buffer.
1067  */
1068 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1069 {
1070         struct iwl_rx_queue *rxq = &priv->rxq;
1071         struct list_head *element;
1072         struct iwl_rx_mem_buffer *rxb;
1073         unsigned long flags;
1074         int write, rc;
1075
1076         spin_lock_irqsave(&rxq->lock, flags);
1077         write = rxq->write & ~0x7;
1078         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1079                 /* Get next free Rx buffer, remove from free list */
1080                 element = rxq->rx_free.next;
1081                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1082                 list_del(element);
1083
1084                 /* Point to Rx buffer via next RBD in circular buffer */
1085                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1086                 rxq->queue[rxq->write] = rxb;
1087                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1088                 rxq->free_count--;
1089         }
1090         spin_unlock_irqrestore(&rxq->lock, flags);
1091         /* If the pre-allocated buffer pool is dropping low, schedule to
1092          * refill it */
1093         if (rxq->free_count <= RX_LOW_WATERMARK)
1094                 queue_work(priv->workqueue, &priv->rx_replenish);
1095
1096
1097         /* If we've added more space for the firmware to place data, tell it.
1098          * Increment device's write pointer in multiples of 8. */
1099         if ((rxq->write_actual != (rxq->write & ~0x7))
1100             || (abs(rxq->write - rxq->read) > 7)) {
1101                 spin_lock_irqsave(&rxq->lock, flags);
1102                 rxq->need_update = 1;
1103                 spin_unlock_irqrestore(&rxq->lock, flags);
1104                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1105                 if (rc)
1106                         return rc;
1107         }
1108
1109         return 0;
1110 }
1111
1112 /**
1113  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1114  *
1115  * When moving to rx_free an SKB is allocated for the slot.
1116  *
1117  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1118  * This is called as a scheduled work item (except for during initialization)
1119  */
1120 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1121 {
1122         struct iwl_rx_queue *rxq = &priv->rxq;
1123         struct list_head *element;
1124         struct iwl_rx_mem_buffer *rxb;
1125         struct sk_buff *skb;
1126         unsigned long flags;
1127
1128         while (1) {
1129                 spin_lock_irqsave(&rxq->lock, flags);
1130
1131                 if (list_empty(&rxq->rx_used)) {
1132                         spin_unlock_irqrestore(&rxq->lock, flags);
1133                         return;
1134                 }
1135                 spin_unlock_irqrestore(&rxq->lock, flags);
1136
1137                 if (rxq->free_count > RX_LOW_WATERMARK)
1138                         priority |= __GFP_NOWARN;
1139                 /* Alloc a new receive buffer */
1140                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1141                 if (!skb) {
1142                         if (net_ratelimit())
1143                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1144                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1145                             net_ratelimit())
1146                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1147                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1148                                          rxq->free_count);
1149                         /* We don't reschedule replenish work here -- we will
1150                          * call the restock method and if it still needs
1151                          * more buffers it will schedule replenish */
1152                         break;
1153                 }
1154
1155                 spin_lock_irqsave(&rxq->lock, flags);
1156                 if (list_empty(&rxq->rx_used)) {
1157                         spin_unlock_irqrestore(&rxq->lock, flags);
1158                         dev_kfree_skb_any(skb);
1159                         return;
1160                 }
1161                 element = rxq->rx_used.next;
1162                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1163                 list_del(element);
1164                 spin_unlock_irqrestore(&rxq->lock, flags);
1165
1166                 rxb->skb = skb;
1167
1168                 /* If radiotap head is required, reserve some headroom here.
1169                  * The physical head count is a variable rx_stats->phy_count.
1170                  * We reserve 4 bytes here. Plus these extra bytes, the
1171                  * headroom of the physical head should be enough for the
1172                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1173                  */
1174                 skb_reserve(rxb->skb, 4);
1175
1176                 /* Get physical address of RB/SKB */
1177                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1178                                                 rxb->skb->data,
1179                                                 priv->hw_params.rx_buf_size,
1180                                                 PCI_DMA_FROMDEVICE);
1181
1182                 spin_lock_irqsave(&rxq->lock, flags);
1183                 list_add_tail(&rxb->list, &rxq->rx_free);
1184                 priv->alloc_rxb_skb++;
1185                 rxq->free_count++;
1186                 spin_unlock_irqrestore(&rxq->lock, flags);
1187         }
1188 }
1189
1190 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1191 {
1192         unsigned long flags;
1193         int i;
1194         spin_lock_irqsave(&rxq->lock, flags);
1195         INIT_LIST_HEAD(&rxq->rx_free);
1196         INIT_LIST_HEAD(&rxq->rx_used);
1197         /* Fill the rx_used queue with _all_ of the Rx buffers */
1198         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1199                 /* In the reset function, these buffers may have been allocated
1200                  * to an SKB, so we need to unmap and free potential storage */
1201                 if (rxq->pool[i].skb != NULL) {
1202                         pci_unmap_single(priv->pci_dev,
1203                                          rxq->pool[i].real_dma_addr,
1204                                          priv->hw_params.rx_buf_size,
1205                                          PCI_DMA_FROMDEVICE);
1206                         priv->alloc_rxb_skb--;
1207                         dev_kfree_skb(rxq->pool[i].skb);
1208                         rxq->pool[i].skb = NULL;
1209                 }
1210                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1211         }
1212
1213         /* Set us so that we have processed and used all buffers, but have
1214          * not restocked the Rx queue with fresh buffers */
1215         rxq->read = rxq->write = 0;
1216         rxq->free_count = 0;
1217         rxq->write_actual = 0;
1218         spin_unlock_irqrestore(&rxq->lock, flags);
1219 }
1220
1221 void iwl3945_rx_replenish(void *data)
1222 {
1223         struct iwl_priv *priv = data;
1224         unsigned long flags;
1225
1226         iwl3945_rx_allocate(priv, GFP_KERNEL);
1227
1228         spin_lock_irqsave(&priv->lock, flags);
1229         iwl3945_rx_queue_restock(priv);
1230         spin_unlock_irqrestore(&priv->lock, flags);
1231 }
1232
1233 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1234 {
1235         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1236
1237         iwl3945_rx_queue_restock(priv);
1238 }
1239
1240
1241 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1242  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1243  * This free routine walks the list of POOL entries and if SKB is set to
1244  * non NULL it is unmapped and freed
1245  */
1246 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1247 {
1248         int i;
1249         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1250                 if (rxq->pool[i].skb != NULL) {
1251                         pci_unmap_single(priv->pci_dev,
1252                                          rxq->pool[i].real_dma_addr,
1253                                          priv->hw_params.rx_buf_size,
1254                                          PCI_DMA_FROMDEVICE);
1255                         dev_kfree_skb(rxq->pool[i].skb);
1256                 }
1257         }
1258
1259         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1260                             rxq->dma_addr);
1261         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1262                             rxq->rb_stts, rxq->rb_stts_dma);
1263         rxq->bd = NULL;
1264         rxq->rb_stts  = NULL;
1265 }
1266
1267
1268 /* Convert linear signal-to-noise ratio into dB */
1269 static u8 ratio2dB[100] = {
1270 /*       0   1   2   3   4   5   6   7   8   9 */
1271          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1272         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1273         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1274         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1275         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1276         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1277         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1278         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1279         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1280         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1281 };
1282
1283 /* Calculates a relative dB value from a ratio of linear
1284  *   (i.e. not dB) signal levels.
1285  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1286 int iwl3945_calc_db_from_ratio(int sig_ratio)
1287 {
1288         /* 1000:1 or higher just report as 60 dB */
1289         if (sig_ratio >= 1000)
1290                 return 60;
1291
1292         /* 100:1 or higher, divide by 10 and use table,
1293          *   add 20 dB to make up for divide by 10 */
1294         if (sig_ratio >= 100)
1295                 return 20 + (int)ratio2dB[sig_ratio/10];
1296
1297         /* We shouldn't see this */
1298         if (sig_ratio < 1)
1299                 return 0;
1300
1301         /* Use table for ratios 1:1 - 99:1 */
1302         return (int)ratio2dB[sig_ratio];
1303 }
1304
1305 #define PERFECT_RSSI (-20) /* dBm */
1306 #define WORST_RSSI (-95)   /* dBm */
1307 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1308
1309 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1310  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1311  *   about formulas used below. */
1312 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1313 {
1314         int sig_qual;
1315         int degradation = PERFECT_RSSI - rssi_dbm;
1316
1317         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1318          * as indicator; formula is (signal dbm - noise dbm).
1319          * SNR at or above 40 is a great signal (100%).
1320          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1321          * Weakest usable signal is usually 10 - 15 dB SNR. */
1322         if (noise_dbm) {
1323                 if (rssi_dbm - noise_dbm >= 40)
1324                         return 100;
1325                 else if (rssi_dbm < noise_dbm)
1326                         return 0;
1327                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1328
1329         /* Else use just the signal level.
1330          * This formula is a least squares fit of data points collected and
1331          *   compared with a reference system that had a percentage (%) display
1332          *   for signal quality. */
1333         } else
1334                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1335                             (15 * RSSI_RANGE + 62 * degradation)) /
1336                            (RSSI_RANGE * RSSI_RANGE);
1337
1338         if (sig_qual > 100)
1339                 sig_qual = 100;
1340         else if (sig_qual < 1)
1341                 sig_qual = 0;
1342
1343         return sig_qual;
1344 }
1345
1346 /**
1347  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1348  *
1349  * Uses the priv->rx_handlers callback function array to invoke
1350  * the appropriate handlers, including command responses,
1351  * frame-received notifications, and other notifications.
1352  */
1353 static void iwl3945_rx_handle(struct iwl_priv *priv)
1354 {
1355         struct iwl_rx_mem_buffer *rxb;
1356         struct iwl_rx_packet *pkt;
1357         struct iwl_rx_queue *rxq = &priv->rxq;
1358         u32 r, i;
1359         int reclaim;
1360         unsigned long flags;
1361         u8 fill_rx = 0;
1362         u32 count = 8;
1363         int total_empty = 0;
1364
1365         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1366          * buffer that the driver may process (last buffer filled by ucode). */
1367         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1368         i = rxq->read;
1369
1370         /* calculate total frames need to be restock after handling RX */
1371         total_empty = r - priv->rxq.write_actual;
1372         if (total_empty < 0)
1373                 total_empty += RX_QUEUE_SIZE;
1374
1375         if (total_empty > (RX_QUEUE_SIZE / 2))
1376                 fill_rx = 1;
1377         /* Rx interrupt, but nothing sent from uCode */
1378         if (i == r)
1379                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1380
1381         while (i != r) {
1382                 rxb = rxq->queue[i];
1383
1384                 /* If an RXB doesn't have a Rx queue slot associated with it,
1385                  * then a bug has been introduced in the queue refilling
1386                  * routines -- catch it here */
1387                 BUG_ON(rxb == NULL);
1388
1389                 rxq->queue[i] = NULL;
1390
1391                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1392                                 priv->hw_params.rx_buf_size,
1393                                 PCI_DMA_FROMDEVICE);
1394                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1395
1396                 trace_iwlwifi_dev_rx(priv, pkt,
1397                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1398
1399                 /* Reclaim a command buffer only if this packet is a response
1400                  *   to a (driver-originated) command.
1401                  * If the packet (e.g. Rx frame) originated from uCode,
1402                  *   there is no command buffer to reclaim.
1403                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1404                  *   but apparently a few don't get set; catch them here. */
1405                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1406                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1407                         (pkt->hdr.cmd != REPLY_TX);
1408
1409                 /* Based on type of command response or notification,
1410                  *   handle those that need handling via function in
1411                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1412                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1413                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1414                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1415                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1416                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1417                 } else {
1418                         /* No handling needed */
1419                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1420                                 r, i, get_cmd_string(pkt->hdr.cmd),
1421                                 pkt->hdr.cmd);
1422                 }
1423
1424                 if (reclaim) {
1425                         /* Invoke any callbacks, transfer the skb to caller, and
1426                          * fire off the (possibly) blocking iwl_send_cmd()
1427                          * as we reclaim the driver command queue */
1428                         if (rxb && rxb->skb)
1429                                 iwl_tx_cmd_complete(priv, rxb);
1430                         else
1431                                 IWL_WARN(priv, "Claim null rxb?\n");
1432                 }
1433
1434                 /* For now we just don't re-use anything.  We can tweak this
1435                  * later to try and re-use notification packets and SKBs that
1436                  * fail to Rx correctly */
1437                 if (rxb->skb != NULL) {
1438                         priv->alloc_rxb_skb--;
1439                         dev_kfree_skb_any(rxb->skb);
1440                         rxb->skb = NULL;
1441                 }
1442
1443                 spin_lock_irqsave(&rxq->lock, flags);
1444                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1445                 spin_unlock_irqrestore(&rxq->lock, flags);
1446                 i = (i + 1) & RX_QUEUE_MASK;
1447                 /* If there are a lot of unused frames,
1448                  * restock the Rx queue so ucode won't assert. */
1449                 if (fill_rx) {
1450                         count++;
1451                         if (count >= 8) {
1452                                 priv->rxq.read = i;
1453                                 iwl3945_rx_replenish_now(priv);
1454                                 count = 0;
1455                         }
1456                 }
1457         }
1458
1459         /* Backtrack one entry */
1460         priv->rxq.read = i;
1461         if (fill_rx)
1462                 iwl3945_rx_replenish_now(priv);
1463         else
1464                 iwl3945_rx_queue_restock(priv);
1465 }
1466
1467 /* call this function to flush any scheduled tasklet */
1468 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1469 {
1470         /* wait to make sure we flush pending tasklet*/
1471         synchronize_irq(priv->pci_dev->irq);
1472         tasklet_kill(&priv->irq_tasklet);
1473 }
1474
1475 #ifdef CONFIG_IWLWIFI_DEBUG
1476 static const char *desc_lookup(int i)
1477 {
1478         switch (i) {
1479         case 1:
1480                 return "FAIL";
1481         case 2:
1482                 return "BAD_PARAM";
1483         case 3:
1484                 return "BAD_CHECKSUM";
1485         case 4:
1486                 return "NMI_INTERRUPT";
1487         case 5:
1488                 return "SYSASSERT";
1489         case 6:
1490                 return "FATAL_ERROR";
1491         }
1492
1493         return "UNKNOWN";
1494 }
1495
1496 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1497 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1498
1499 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1500 {
1501         u32 i;
1502         u32 desc, time, count, base, data1;
1503         u32 blink1, blink2, ilink1, ilink2;
1504
1505         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1506
1507         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1508                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1509                 return;
1510         }
1511
1512
1513         count = iwl_read_targ_mem(priv, base);
1514
1515         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1516                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1517                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1518                         priv->status, count);
1519         }
1520
1521         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1522                   "ilink1  nmiPC   Line\n");
1523         for (i = ERROR_START_OFFSET;
1524              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1525              i += ERROR_ELEM_SIZE) {
1526                 desc = iwl_read_targ_mem(priv, base + i);
1527                 time =
1528                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1529                 blink1 =
1530                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1531                 blink2 =
1532                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1533                 ilink1 =
1534                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1535                 ilink2 =
1536                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1537                 data1 =
1538                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1539
1540                 IWL_ERR(priv,
1541                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1542                         desc_lookup(desc), desc, time, blink1, blink2,
1543                         ilink1, ilink2, data1);
1544                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1545                                         0, blink1, blink2, ilink1, ilink2);
1546         }
1547 }
1548
1549 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1550
1551 /**
1552  * iwl3945_print_event_log - Dump error event log to syslog
1553  *
1554  */
1555 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1556                                 u32 num_events, u32 mode)
1557 {
1558         u32 i;
1559         u32 base;       /* SRAM byte address of event log header */
1560         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1561         u32 ptr;        /* SRAM byte address of log data */
1562         u32 ev, time, data; /* event log data */
1563
1564         if (num_events == 0)
1565                 return;
1566
1567         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1568
1569         if (mode == 0)
1570                 event_size = 2 * sizeof(u32);
1571         else
1572                 event_size = 3 * sizeof(u32);
1573
1574         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1575
1576         /* "time" is actually "data" for mode 0 (no timestamp).
1577          * place event id # at far right for easier visual parsing. */
1578         for (i = 0; i < num_events; i++) {
1579                 ev = iwl_read_targ_mem(priv, ptr);
1580                 ptr += sizeof(u32);
1581                 time = iwl_read_targ_mem(priv, ptr);
1582                 ptr += sizeof(u32);
1583                 if (mode == 0) {
1584                         /* data, ev */
1585                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1586                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1587                 } else {
1588                         data = iwl_read_targ_mem(priv, ptr);
1589                         ptr += sizeof(u32);
1590                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1591                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1592                 }
1593         }
1594 }
1595
1596 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1597 {
1598         u32 base;       /* SRAM byte address of event log header */
1599         u32 capacity;   /* event log capacity in # entries */
1600         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1601         u32 num_wraps;  /* # times uCode wrapped to top of log */
1602         u32 next_entry; /* index of next entry to be written by uCode */
1603         u32 size;       /* # entries that we'll print */
1604
1605         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1606         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1607                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1608                 return;
1609         }
1610
1611         /* event log header */
1612         capacity = iwl_read_targ_mem(priv, base);
1613         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1614         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1615         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1616
1617         size = num_wraps ? capacity : next_entry;
1618
1619         /* bail out if nothing in log */
1620         if (size == 0) {
1621                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1622                 return;
1623         }
1624
1625         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1626                   size, num_wraps);
1627
1628         /* if uCode has wrapped back to top of log, start at the oldest entry,
1629          * i.e the next one that uCode would fill. */
1630         if (num_wraps)
1631                 iwl3945_print_event_log(priv, next_entry,
1632                                     capacity - next_entry, mode);
1633
1634         /* (then/else) start at top of log */
1635         iwl3945_print_event_log(priv, 0, next_entry, mode);
1636
1637 }
1638 #else
1639 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1640 {
1641 }
1642
1643 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1644 {
1645 }
1646
1647 #endif
1648
1649 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1650 {
1651         u32 inta, handled = 0;
1652         u32 inta_fh;
1653         unsigned long flags;
1654 #ifdef CONFIG_IWLWIFI_DEBUG
1655         u32 inta_mask;
1656 #endif
1657
1658         spin_lock_irqsave(&priv->lock, flags);
1659
1660         /* Ack/clear/reset pending uCode interrupts.
1661          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1662          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1663         inta = iwl_read32(priv, CSR_INT);
1664         iwl_write32(priv, CSR_INT, inta);
1665
1666         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1667          * Any new interrupts that happen after this, either while we're
1668          * in this tasklet, or later, will show up in next ISR/tasklet. */
1669         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1670         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1671
1672 #ifdef CONFIG_IWLWIFI_DEBUG
1673         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1674                 /* just for debug */
1675                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1676                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1677                               inta, inta_mask, inta_fh);
1678         }
1679 #endif
1680
1681         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1682          * atomic, make sure that inta covers all the interrupts that
1683          * we've discovered, even if FH interrupt came in just after
1684          * reading CSR_INT. */
1685         if (inta_fh & CSR39_FH_INT_RX_MASK)
1686                 inta |= CSR_INT_BIT_FH_RX;
1687         if (inta_fh & CSR39_FH_INT_TX_MASK)
1688                 inta |= CSR_INT_BIT_FH_TX;
1689
1690         /* Now service all interrupt bits discovered above. */
1691         if (inta & CSR_INT_BIT_HW_ERR) {
1692                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1693
1694                 /* Tell the device to stop sending interrupts */
1695                 iwl_disable_interrupts(priv);
1696
1697                 priv->isr_stats.hw++;
1698                 iwl_irq_handle_error(priv);
1699
1700                 handled |= CSR_INT_BIT_HW_ERR;
1701
1702                 spin_unlock_irqrestore(&priv->lock, flags);
1703
1704                 return;
1705         }
1706
1707 #ifdef CONFIG_IWLWIFI_DEBUG
1708         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1709                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1710                 if (inta & CSR_INT_BIT_SCD) {
1711                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1712                                       "the frame/frames.\n");
1713                         priv->isr_stats.sch++;
1714                 }
1715
1716                 /* Alive notification via Rx interrupt will do the real work */
1717                 if (inta & CSR_INT_BIT_ALIVE) {
1718                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1719                         priv->isr_stats.alive++;
1720                 }
1721         }
1722 #endif
1723         /* Safely ignore these bits for debug checks below */
1724         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1725
1726         /* Error detected by uCode */
1727         if (inta & CSR_INT_BIT_SW_ERR) {
1728                 IWL_ERR(priv, "Microcode SW error detected. "
1729                         "Restarting 0x%X.\n", inta);
1730                 priv->isr_stats.sw++;
1731                 priv->isr_stats.sw_err = inta;
1732                 iwl_irq_handle_error(priv);
1733                 handled |= CSR_INT_BIT_SW_ERR;
1734         }
1735
1736         /* uCode wakes up after power-down sleep */
1737         if (inta & CSR_INT_BIT_WAKEUP) {
1738                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1739                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1740                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1741                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1742                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1743                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1744                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1745                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1746
1747                 priv->isr_stats.wakeup++;
1748                 handled |= CSR_INT_BIT_WAKEUP;
1749         }
1750
1751         /* All uCode command responses, including Tx command responses,
1752          * Rx "responses" (frame-received notification), and other
1753          * notifications from uCode come through here*/
1754         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1755                 iwl3945_rx_handle(priv);
1756                 priv->isr_stats.rx++;
1757                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1758         }
1759
1760         if (inta & CSR_INT_BIT_FH_TX) {
1761                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1762                 priv->isr_stats.tx++;
1763
1764                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1765                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1766                                         (FH39_SRVC_CHNL), 0x0);
1767                 handled |= CSR_INT_BIT_FH_TX;
1768         }
1769
1770         if (inta & ~handled) {
1771                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1772                 priv->isr_stats.unhandled++;
1773         }
1774
1775         if (inta & ~priv->inta_mask) {
1776                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1777                          inta & ~priv->inta_mask);
1778                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1779         }
1780
1781         /* Re-enable all interrupts */
1782         /* only Re-enable if disabled by irq */
1783         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1784                 iwl_enable_interrupts(priv);
1785
1786 #ifdef CONFIG_IWLWIFI_DEBUG
1787         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1788                 inta = iwl_read32(priv, CSR_INT);
1789                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1790                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1791                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1792                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1793         }
1794 #endif
1795         spin_unlock_irqrestore(&priv->lock, flags);
1796 }
1797
1798 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1799                                          enum ieee80211_band band,
1800                                      u8 is_active, u8 n_probes,
1801                                      struct iwl3945_scan_channel *scan_ch)
1802 {
1803         struct ieee80211_channel *chan;
1804         const struct ieee80211_supported_band *sband;
1805         const struct iwl_channel_info *ch_info;
1806         u16 passive_dwell = 0;
1807         u16 active_dwell = 0;
1808         int added, i;
1809
1810         sband = iwl_get_hw_mode(priv, band);
1811         if (!sband)
1812                 return 0;
1813
1814         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1815         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1816
1817         if (passive_dwell <= active_dwell)
1818                 passive_dwell = active_dwell + 1;
1819
1820         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1821                 chan = priv->scan_request->channels[i];
1822
1823                 if (chan->band != band)
1824                         continue;
1825
1826                 scan_ch->channel = chan->hw_value;
1827
1828                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1829                 if (!is_channel_valid(ch_info)) {
1830                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1831                                        scan_ch->channel);
1832                         continue;
1833                 }
1834
1835                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1836                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1837                 /* If passive , set up for auto-switch
1838                  *  and use long active_dwell time.
1839                  */
1840                 if (!is_active || is_channel_passive(ch_info) ||
1841                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1842                         scan_ch->type = 0;      /* passive */
1843                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1844                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1845                 } else {
1846                         scan_ch->type = 1;      /* active */
1847                 }
1848
1849                 /* Set direct probe bits. These may be used both for active
1850                  * scan channels (probes gets sent right away),
1851                  * or for passive channels (probes get se sent only after
1852                  * hearing clear Rx packet).*/
1853                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1854                         if (n_probes)
1855                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1856                 } else {
1857                         /* uCode v1 does not allow setting direct probe bits on
1858                          * passive channel. */
1859                         if ((scan_ch->type & 1) && n_probes)
1860                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1861                 }
1862
1863                 /* Set txpower levels to defaults */
1864                 scan_ch->tpc.dsp_atten = 110;
1865                 /* scan_pwr_info->tpc.dsp_atten; */
1866
1867                 /*scan_pwr_info->tpc.tx_gain; */
1868                 if (band == IEEE80211_BAND_5GHZ)
1869                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1870                 else {
1871                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1872                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1873                          * power level:
1874                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1875                          */
1876                 }
1877
1878                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1879                                scan_ch->channel,
1880                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1881                                (scan_ch->type & 1) ?
1882                                active_dwell : passive_dwell);
1883
1884                 scan_ch++;
1885                 added++;
1886         }
1887
1888         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1889         return added;
1890 }
1891
1892 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1893                               struct ieee80211_rate *rates)
1894 {
1895         int i;
1896
1897         for (i = 0; i < IWL_RATE_COUNT; i++) {
1898                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1899                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1900                 rates[i].hw_value_short = i;
1901                 rates[i].flags = 0;
1902                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1903                         /*
1904                          * If CCK != 1M then set short preamble rate flag.
1905                          */
1906                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1907                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1908                 }
1909         }
1910 }
1911
1912 /******************************************************************************
1913  *
1914  * uCode download functions
1915  *
1916  ******************************************************************************/
1917
1918 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1919 {
1920         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1921         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1922         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1923         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1924         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1925         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1926 }
1927
1928 /**
1929  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1930  *     looking at all data.
1931  */
1932 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1933 {
1934         u32 val;
1935         u32 save_len = len;
1936         int rc = 0;
1937         u32 errcnt;
1938
1939         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1940
1941         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1942                                IWL39_RTC_INST_LOWER_BOUND);
1943
1944         errcnt = 0;
1945         for (; len > 0; len -= sizeof(u32), image++) {
1946                 /* read data comes through single port, auto-incr addr */
1947                 /* NOTE: Use the debugless read so we don't flood kernel log
1948                  * if IWL_DL_IO is set */
1949                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1950                 if (val != le32_to_cpu(*image)) {
1951                         IWL_ERR(priv, "uCode INST section is invalid at "
1952                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1953                                   save_len - len, val, le32_to_cpu(*image));
1954                         rc = -EIO;
1955                         errcnt++;
1956                         if (errcnt >= 20)
1957                                 break;
1958                 }
1959         }
1960
1961
1962         if (!errcnt)
1963                 IWL_DEBUG_INFO(priv,
1964                         "ucode image in INSTRUCTION memory is good\n");
1965
1966         return rc;
1967 }
1968
1969
1970 /**
1971  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1972  *   using sample data 100 bytes apart.  If these sample points are good,
1973  *   it's a pretty good bet that everything between them is good, too.
1974  */
1975 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1976 {
1977         u32 val;
1978         int rc = 0;
1979         u32 errcnt = 0;
1980         u32 i;
1981
1982         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1983
1984         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1985                 /* read data comes through single port, auto-incr addr */
1986                 /* NOTE: Use the debugless read so we don't flood kernel log
1987                  * if IWL_DL_IO is set */
1988                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1989                         i + IWL39_RTC_INST_LOWER_BOUND);
1990                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1991                 if (val != le32_to_cpu(*image)) {
1992 #if 0 /* Enable this if you want to see details */
1993                         IWL_ERR(priv, "uCode INST section is invalid at "
1994                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1995                                   i, val, *image);
1996 #endif
1997                         rc = -EIO;
1998                         errcnt++;
1999                         if (errcnt >= 3)
2000                                 break;
2001                 }
2002         }
2003
2004         return rc;
2005 }
2006
2007
2008 /**
2009  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2010  *    and verify its contents
2011  */
2012 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2013 {
2014         __le32 *image;
2015         u32 len;
2016         int rc = 0;
2017
2018         /* Try bootstrap */
2019         image = (__le32 *)priv->ucode_boot.v_addr;
2020         len = priv->ucode_boot.len;
2021         rc = iwl3945_verify_inst_sparse(priv, image, len);
2022         if (rc == 0) {
2023                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2024                 return 0;
2025         }
2026
2027         /* Try initialize */
2028         image = (__le32 *)priv->ucode_init.v_addr;
2029         len = priv->ucode_init.len;
2030         rc = iwl3945_verify_inst_sparse(priv, image, len);
2031         if (rc == 0) {
2032                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2033                 return 0;
2034         }
2035
2036         /* Try runtime/protocol */
2037         image = (__le32 *)priv->ucode_code.v_addr;
2038         len = priv->ucode_code.len;
2039         rc = iwl3945_verify_inst_sparse(priv, image, len);
2040         if (rc == 0) {
2041                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2042                 return 0;
2043         }
2044
2045         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2046
2047         /* Since nothing seems to match, show first several data entries in
2048          * instruction SRAM, so maybe visual inspection will give a clue.
2049          * Selection of bootstrap image (vs. other images) is arbitrary. */
2050         image = (__le32 *)priv->ucode_boot.v_addr;
2051         len = priv->ucode_boot.len;
2052         rc = iwl3945_verify_inst_full(priv, image, len);
2053
2054         return rc;
2055 }
2056
2057 static void iwl3945_nic_start(struct iwl_priv *priv)
2058 {
2059         /* Remove all resets to allow NIC to operate */
2060         iwl_write32(priv, CSR_RESET, 0);
2061 }
2062
2063 /**
2064  * iwl3945_read_ucode - Read uCode images from disk file.
2065  *
2066  * Copy into buffers for card to fetch via bus-mastering
2067  */
2068 static int iwl3945_read_ucode(struct iwl_priv *priv)
2069 {
2070         const struct iwl_ucode_header *ucode;
2071         int ret = -EINVAL, index;
2072         const struct firmware *ucode_raw;
2073         /* firmware file name contains uCode/driver compatibility version */
2074         const char *name_pre = priv->cfg->fw_name_pre;
2075         const unsigned int api_max = priv->cfg->ucode_api_max;
2076         const unsigned int api_min = priv->cfg->ucode_api_min;
2077         char buf[25];
2078         u8 *src;
2079         size_t len;
2080         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2081
2082         /* Ask kernel firmware_class module to get the boot firmware off disk.
2083          * request_firmware() is synchronous, file is in memory on return. */
2084         for (index = api_max; index >= api_min; index--) {
2085                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2086                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2087                 if (ret < 0) {
2088                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2089                                   buf, ret);
2090                         if (ret == -ENOENT)
2091                                 continue;
2092                         else
2093                                 goto error;
2094                 } else {
2095                         if (index < api_max)
2096                                 IWL_ERR(priv, "Loaded firmware %s, "
2097                                         "which is deprecated. "
2098                                         " Please use API v%u instead.\n",
2099                                           buf, api_max);
2100                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2101                                        "(%zd bytes) from disk\n",
2102                                        buf, ucode_raw->size);
2103                         break;
2104                 }
2105         }
2106
2107         if (ret < 0)
2108                 goto error;
2109
2110         /* Make sure that we got at least our header! */
2111         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2112                 IWL_ERR(priv, "File size way too small!\n");
2113                 ret = -EINVAL;
2114                 goto err_release;
2115         }
2116
2117         /* Data from ucode file:  header followed by uCode images */
2118         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2119
2120         priv->ucode_ver = le32_to_cpu(ucode->ver);
2121         api_ver = IWL_UCODE_API(priv->ucode_ver);
2122         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2123         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2124         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2125         init_data_size =
2126                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2127         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2128         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2129
2130         /* api_ver should match the api version forming part of the
2131          * firmware filename ... but we don't check for that and only rely
2132          * on the API version read from firmware header from here on forward */
2133
2134         if (api_ver < api_min || api_ver > api_max) {
2135                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2136                           "Driver supports v%u, firmware is v%u.\n",
2137                           api_max, api_ver);
2138                 priv->ucode_ver = 0;
2139                 ret = -EINVAL;
2140                 goto err_release;
2141         }
2142         if (api_ver != api_max)
2143                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2144                           "got %u. New firmware can be obtained "
2145                           "from http://www.intellinuxwireless.org.\n",
2146                           api_max, api_ver);
2147
2148         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2149                 IWL_UCODE_MAJOR(priv->ucode_ver),
2150                 IWL_UCODE_MINOR(priv->ucode_ver),
2151                 IWL_UCODE_API(priv->ucode_ver),
2152                 IWL_UCODE_SERIAL(priv->ucode_ver));
2153
2154         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2155                        priv->ucode_ver);
2156         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2157                        inst_size);
2158         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2159                        data_size);
2160         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2161                        init_size);
2162         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2163                        init_data_size);
2164         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2165                        boot_size);
2166
2167
2168         /* Verify size of file vs. image size info in file's header */
2169         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2170                 inst_size + data_size + init_size +
2171                 init_data_size + boot_size) {
2172
2173                 IWL_DEBUG_INFO(priv,
2174                         "uCode file size %zd does not match expected size\n",
2175                         ucode_raw->size);
2176                 ret = -EINVAL;
2177                 goto err_release;
2178         }
2179
2180         /* Verify that uCode images will fit in card's SRAM */
2181         if (inst_size > IWL39_MAX_INST_SIZE) {
2182                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2183                                inst_size);
2184                 ret = -EINVAL;
2185                 goto err_release;
2186         }
2187
2188         if (data_size > IWL39_MAX_DATA_SIZE) {
2189                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2190                                data_size);
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194         if (init_size > IWL39_MAX_INST_SIZE) {
2195                 IWL_DEBUG_INFO(priv,
2196                                 "uCode init instr len %d too large to fit in\n",
2197                                 init_size);
2198                 ret = -EINVAL;
2199                 goto err_release;
2200         }
2201         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2202                 IWL_DEBUG_INFO(priv,
2203                                 "uCode init data len %d too large to fit in\n",
2204                                 init_data_size);
2205                 ret = -EINVAL;
2206                 goto err_release;
2207         }
2208         if (boot_size > IWL39_MAX_BSM_SIZE) {
2209                 IWL_DEBUG_INFO(priv,
2210                                 "uCode boot instr len %d too large to fit in\n",
2211                                 boot_size);
2212                 ret = -EINVAL;
2213                 goto err_release;
2214         }
2215
2216         /* Allocate ucode buffers for card's bus-master loading ... */
2217
2218         /* Runtime instructions and 2 copies of data:
2219          * 1) unmodified from disk
2220          * 2) backup cache for save/restore during power-downs */
2221         priv->ucode_code.len = inst_size;
2222         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2223
2224         priv->ucode_data.len = data_size;
2225         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2226
2227         priv->ucode_data_backup.len = data_size;
2228         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2229
2230         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2231             !priv->ucode_data_backup.v_addr)
2232                 goto err_pci_alloc;
2233
2234         /* Initialization instructions and data */
2235         if (init_size && init_data_size) {
2236                 priv->ucode_init.len = init_size;
2237                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2238
2239                 priv->ucode_init_data.len = init_data_size;
2240                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2241
2242                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2243                         goto err_pci_alloc;
2244         }
2245
2246         /* Bootstrap (instructions only, no data) */
2247         if (boot_size) {
2248                 priv->ucode_boot.len = boot_size;
2249                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2250
2251                 if (!priv->ucode_boot.v_addr)
2252                         goto err_pci_alloc;
2253         }
2254
2255         /* Copy images into buffers for card's bus-master reads ... */
2256
2257         /* Runtime instructions (first block of data in file) */
2258         len = inst_size;
2259         IWL_DEBUG_INFO(priv,
2260                 "Copying (but not loading) uCode instr len %zd\n", len);
2261         memcpy(priv->ucode_code.v_addr, src, len);
2262         src += len;
2263
2264         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2265                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2266
2267         /* Runtime data (2nd block)
2268          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2269         len = data_size;
2270         IWL_DEBUG_INFO(priv,
2271                 "Copying (but not loading) uCode data len %zd\n", len);
2272         memcpy(priv->ucode_data.v_addr, src, len);
2273         memcpy(priv->ucode_data_backup.v_addr, src, len);
2274         src += len;
2275
2276         /* Initialization instructions (3rd block) */
2277         if (init_size) {
2278                 len = init_size;
2279                 IWL_DEBUG_INFO(priv,
2280                         "Copying (but not loading) init instr len %zd\n", len);
2281                 memcpy(priv->ucode_init.v_addr, src, len);
2282                 src += len;
2283         }
2284
2285         /* Initialization data (4th block) */
2286         if (init_data_size) {
2287                 len = init_data_size;
2288                 IWL_DEBUG_INFO(priv,
2289                         "Copying (but not loading) init data len %zd\n", len);
2290                 memcpy(priv->ucode_init_data.v_addr, src, len);
2291                 src += len;
2292         }
2293
2294         /* Bootstrap instructions (5th block) */
2295         len = boot_size;
2296         IWL_DEBUG_INFO(priv,
2297                 "Copying (but not loading) boot instr len %zd\n", len);
2298         memcpy(priv->ucode_boot.v_addr, src, len);
2299
2300         /* We have our copies now, allow OS release its copies */
2301         release_firmware(ucode_raw);
2302         return 0;
2303
2304  err_pci_alloc:
2305         IWL_ERR(priv, "failed to allocate pci memory\n");
2306         ret = -ENOMEM;
2307         iwl3945_dealloc_ucode_pci(priv);
2308
2309  err_release:
2310         release_firmware(ucode_raw);
2311
2312  error:
2313         return ret;
2314 }
2315
2316
2317 /**
2318  * iwl3945_set_ucode_ptrs - Set uCode address location
2319  *
2320  * Tell initialization uCode where to find runtime uCode.
2321  *
2322  * BSM registers initially contain pointers to initialization uCode.
2323  * We need to replace them to load runtime uCode inst and data,
2324  * and to save runtime data when powering down.
2325  */
2326 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2327 {
2328         dma_addr_t pinst;
2329         dma_addr_t pdata;
2330
2331         /* bits 31:0 for 3945 */
2332         pinst = priv->ucode_code.p_addr;
2333         pdata = priv->ucode_data_backup.p_addr;
2334
2335         /* Tell bootstrap uCode where to find image to load */
2336         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2337         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2338         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2339                                  priv->ucode_data.len);
2340
2341         /* Inst byte count must be last to set up, bit 31 signals uCode
2342          *   that all new ptr/size info is in place */
2343         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2344                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2345
2346         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2347
2348         return 0;
2349 }
2350
2351 /**
2352  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2353  *
2354  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2355  *
2356  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2357  */
2358 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2359 {
2360         /* Check alive response for "valid" sign from uCode */
2361         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2362                 /* We had an error bringing up the hardware, so take it
2363                  * all the way back down so we can try again */
2364                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2365                 goto restart;
2366         }
2367
2368         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2369          * This is a paranoid check, because we would not have gotten the
2370          * "initialize" alive if code weren't properly loaded.  */
2371         if (iwl3945_verify_ucode(priv)) {
2372                 /* Runtime instruction load was bad;
2373                  * take it all the way back down so we can try again */
2374                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2375                 goto restart;
2376         }
2377
2378         /* Send pointers to protocol/runtime uCode image ... init code will
2379          * load and launch runtime uCode, which will send us another "Alive"
2380          * notification. */
2381         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2382         if (iwl3945_set_ucode_ptrs(priv)) {
2383                 /* Runtime instruction load won't happen;
2384                  * take it all the way back down so we can try again */
2385                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2386                 goto restart;
2387         }
2388         return;
2389
2390  restart:
2391         queue_work(priv->workqueue, &priv->restart);
2392 }
2393
2394 /**
2395  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2396  *                   from protocol/runtime uCode (initialization uCode's
2397  *                   Alive gets handled by iwl3945_init_alive_start()).
2398  */
2399 static void iwl3945_alive_start(struct iwl_priv *priv)
2400 {
2401         int thermal_spin = 0;
2402         u32 rfkill;
2403
2404         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2405
2406         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2407                 /* We had an error bringing up the hardware, so take it
2408                  * all the way back down so we can try again */
2409                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2410                 goto restart;
2411         }
2412
2413         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2414          * This is a paranoid check, because we would not have gotten the
2415          * "runtime" alive if code weren't properly loaded.  */
2416         if (iwl3945_verify_ucode(priv)) {
2417                 /* Runtime instruction load was bad;
2418                  * take it all the way back down so we can try again */
2419                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2420                 goto restart;
2421         }
2422
2423         iwl_clear_stations_table(priv);
2424
2425         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2426         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2427
2428         if (rfkill & 0x1) {
2429                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2430                 /* if RFKILL is not on, then wait for thermal
2431                  * sensor in adapter to kick in */
2432                 while (iwl3945_hw_get_temperature(priv) == 0) {
2433                         thermal_spin++;
2434                         udelay(10);
2435                 }
2436
2437                 if (thermal_spin)
2438                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2439                                        thermal_spin * 10);
2440         } else
2441                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2442
2443         /* After the ALIVE response, we can send commands to 3945 uCode */
2444         set_bit(STATUS_ALIVE, &priv->status);
2445
2446         if (iwl_is_rfkill(priv))
2447                 return;
2448
2449         ieee80211_wake_queues(priv->hw);
2450
2451         priv->active_rate = priv->rates_mask;
2452         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2453
2454         iwl_power_update_mode(priv, false);
2455
2456         if (iwl_is_associated(priv)) {
2457                 struct iwl3945_rxon_cmd *active_rxon =
2458                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2459
2460                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2461                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2462         } else {
2463                 /* Initialize our rx_config data */
2464                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2465         }
2466
2467         /* Configure Bluetooth device coexistence support */
2468         iwl_send_bt_config(priv);
2469
2470         /* Configure the adapter for unassociated operation */
2471         iwlcore_commit_rxon(priv);
2472
2473         iwl3945_reg_txpower_periodic(priv);
2474
2475         iwl_leds_init(priv);
2476
2477         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2478         set_bit(STATUS_READY, &priv->status);
2479         wake_up_interruptible(&priv->wait_command_queue);
2480
2481         /* reassociate for ADHOC mode */
2482         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2483                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2484                                                                 priv->vif);
2485                 if (beacon)
2486                         iwl_mac_beacon_update(priv->hw, beacon);
2487         }
2488
2489         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2490                 iwl_set_mode(priv, priv->iw_mode);
2491
2492         return;
2493
2494  restart:
2495         queue_work(priv->workqueue, &priv->restart);
2496 }
2497
2498 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2499
2500 static void __iwl3945_down(struct iwl_priv *priv)
2501 {
2502         unsigned long flags;
2503         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2504         struct ieee80211_conf *conf = NULL;
2505
2506         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2507
2508         conf = ieee80211_get_hw_conf(priv->hw);
2509
2510         if (!exit_pending)
2511                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2512
2513         iwl_clear_stations_table(priv);
2514
2515         /* Unblock any waiting calls */
2516         wake_up_interruptible_all(&priv->wait_command_queue);
2517
2518         /* Wipe out the EXIT_PENDING status bit if we are not actually
2519          * exiting the module */
2520         if (!exit_pending)
2521                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2522
2523         /* stop and reset the on-board processor */
2524         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2525
2526         /* tell the device to stop sending interrupts */
2527         spin_lock_irqsave(&priv->lock, flags);
2528         iwl_disable_interrupts(priv);
2529         spin_unlock_irqrestore(&priv->lock, flags);
2530         iwl_synchronize_irq(priv);
2531
2532         if (priv->mac80211_registered)
2533                 ieee80211_stop_queues(priv->hw);
2534
2535         /* If we have not previously called iwl3945_init() then
2536          * clear all bits but the RF Kill bits and return */
2537         if (!iwl_is_init(priv)) {
2538                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2539                                         STATUS_RF_KILL_HW |
2540                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2541                                         STATUS_GEO_CONFIGURED |
2542                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2543                                         STATUS_EXIT_PENDING;
2544                 goto exit;
2545         }
2546
2547         /* ...otherwise clear out all the status bits but the RF Kill
2548          * bit and continue taking the NIC down. */
2549         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2550                                 STATUS_RF_KILL_HW |
2551                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2552                                 STATUS_GEO_CONFIGURED |
2553                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2554                                 STATUS_FW_ERROR |
2555                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2556                                 STATUS_EXIT_PENDING;
2557
2558         iwl3945_hw_txq_ctx_stop(priv);
2559         iwl3945_hw_rxq_stop(priv);
2560
2561         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2562                                 APMG_CLK_VAL_DMA_CLK_RQT);
2563
2564         udelay(5);
2565
2566         /* Stop the device, and put it in low power state */
2567         priv->cfg->ops->lib->apm_ops.stop(priv);
2568
2569  exit:
2570         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2571
2572         if (priv->ibss_beacon)
2573                 dev_kfree_skb(priv->ibss_beacon);
2574         priv->ibss_beacon = NULL;
2575
2576         /* clear out any free frames */
2577         iwl3945_clear_free_frames(priv);
2578 }
2579
2580 static void iwl3945_down(struct iwl_priv *priv)
2581 {
2582         mutex_lock(&priv->mutex);
2583         __iwl3945_down(priv);
2584         mutex_unlock(&priv->mutex);
2585
2586         iwl3945_cancel_deferred_work(priv);
2587 }
2588
2589 #define MAX_HW_RESTARTS 5
2590
2591 static int __iwl3945_up(struct iwl_priv *priv)
2592 {
2593         int rc, i;
2594
2595         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2596                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2597                 return -EIO;
2598         }
2599
2600         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2601                 IWL_ERR(priv, "ucode not available for device bring up\n");
2602                 return -EIO;
2603         }
2604
2605         /* If platform's RF_KILL switch is NOT set to KILL */
2606         if (iwl_read32(priv, CSR_GP_CNTRL) &
2607                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2608                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2609         else {
2610                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2611                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2612                 return -ENODEV;
2613         }
2614
2615         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2616
2617         rc = iwl3945_hw_nic_init(priv);
2618         if (rc) {
2619                 IWL_ERR(priv, "Unable to int nic\n");
2620                 return rc;
2621         }
2622
2623         /* make sure rfkill handshake bits are cleared */
2624         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2625         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2626                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2627
2628         /* clear (again), then enable host interrupts */
2629         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2630         iwl_enable_interrupts(priv);
2631
2632         /* really make sure rfkill handshake bits are cleared */
2633         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2634         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2635
2636         /* Copy original ucode data image from disk into backup cache.
2637          * This will be used to initialize the on-board processor's
2638          * data SRAM for a clean start when the runtime program first loads. */
2639         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2640                priv->ucode_data.len);
2641
2642         /* We return success when we resume from suspend and rf_kill is on. */
2643         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2644                 return 0;
2645
2646         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2647
2648                 iwl_clear_stations_table(priv);
2649
2650                 /* load bootstrap state machine,
2651                  * load bootstrap program into processor's memory,
2652                  * prepare to load the "initialize" uCode */
2653                 priv->cfg->ops->lib->load_ucode(priv);
2654
2655                 if (rc) {
2656                         IWL_ERR(priv,
2657                                 "Unable to set up bootstrap uCode: %d\n", rc);
2658                         continue;
2659                 }
2660
2661                 /* start card; "initialize" will load runtime ucode */
2662                 iwl3945_nic_start(priv);
2663
2664                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2665
2666                 return 0;
2667         }
2668
2669         set_bit(STATUS_EXIT_PENDING, &priv->status);
2670         __iwl3945_down(priv);
2671         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2672
2673         /* tried to restart and config the device for as long as our
2674          * patience could withstand */
2675         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2676         return -EIO;
2677 }
2678
2679
2680 /*****************************************************************************
2681  *
2682  * Workqueue callbacks
2683  *
2684  *****************************************************************************/
2685
2686 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2687 {
2688         struct iwl_priv *priv =
2689             container_of(data, struct iwl_priv, init_alive_start.work);
2690
2691         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2692                 return;
2693
2694         mutex_lock(&priv->mutex);
2695         iwl3945_init_alive_start(priv);
2696         mutex_unlock(&priv->mutex);
2697 }
2698
2699 static void iwl3945_bg_alive_start(struct work_struct *data)
2700 {
2701         struct iwl_priv *priv =
2702             container_of(data, struct iwl_priv, alive_start.work);
2703
2704         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2705                 return;
2706
2707         mutex_lock(&priv->mutex);
2708         iwl3945_alive_start(priv);
2709         mutex_unlock(&priv->mutex);
2710 }
2711
2712 /*
2713  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2714  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2715  * *is* readable even when device has been SW_RESET into low power mode
2716  * (e.g. during RF KILL).
2717  */
2718 static void iwl3945_rfkill_poll(struct work_struct *data)
2719 {
2720         struct iwl_priv *priv =
2721             container_of(data, struct iwl_priv, rfkill_poll.work);
2722         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2723         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2724                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2725
2726         if (new_rfkill != old_rfkill) {
2727                 if (new_rfkill)
2728                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2729                 else
2730                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2731
2732                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2733
2734                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2735                                 new_rfkill ? "disable radio" : "enable radio");
2736         }
2737
2738         /* Keep this running, even if radio now enabled.  This will be
2739          * cancelled in mac_start() if system decides to start again */
2740         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2741                            round_jiffies_relative(2 * HZ));
2742
2743 }
2744
2745 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2746 static void iwl3945_bg_request_scan(struct work_struct *data)
2747 {
2748         struct iwl_priv *priv =
2749             container_of(data, struct iwl_priv, request_scan);
2750         struct iwl_host_cmd cmd = {
2751                 .id = REPLY_SCAN_CMD,
2752                 .len = sizeof(struct iwl3945_scan_cmd),
2753                 .flags = CMD_SIZE_HUGE,
2754         };
2755         int rc = 0;
2756         struct iwl3945_scan_cmd *scan;
2757         struct ieee80211_conf *conf = NULL;
2758         u8 n_probes = 0;
2759         enum ieee80211_band band;
2760         bool is_active = false;
2761
2762         conf = ieee80211_get_hw_conf(priv->hw);
2763
2764         mutex_lock(&priv->mutex);
2765
2766         cancel_delayed_work(&priv->scan_check);
2767
2768         if (!iwl_is_ready(priv)) {
2769                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2770                 goto done;
2771         }
2772
2773         /* Make sure the scan wasn't canceled before this queued work
2774          * was given the chance to run... */
2775         if (!test_bit(STATUS_SCANNING, &priv->status))
2776                 goto done;
2777
2778         /* This should never be called or scheduled if there is currently
2779          * a scan active in the hardware. */
2780         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2781                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2782                                 "Ignoring second request.\n");
2783                 rc = -EIO;
2784                 goto done;
2785         }
2786
2787         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2788                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2789                 goto done;
2790         }
2791
2792         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2793                 IWL_DEBUG_HC(priv,
2794                         "Scan request while abort pending. Queuing.\n");
2795                 goto done;
2796         }
2797
2798         if (iwl_is_rfkill(priv)) {
2799                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2800                 goto done;
2801         }
2802
2803         if (!test_bit(STATUS_READY, &priv->status)) {
2804                 IWL_DEBUG_HC(priv,
2805                         "Scan request while uninitialized. Queuing.\n");
2806                 goto done;
2807         }
2808
2809         if (!priv->scan_bands) {
2810                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2811                 goto done;
2812         }
2813
2814         if (!priv->scan) {
2815                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2816                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2817                 if (!priv->scan) {
2818                         rc = -ENOMEM;
2819                         goto done;
2820                 }
2821         }
2822         scan = priv->scan;
2823         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2824
2825         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2826         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2827
2828         if (iwl_is_associated(priv)) {
2829                 u16 interval = 0;
2830                 u32 extra;
2831                 u32 suspend_time = 100;
2832                 u32 scan_suspend_time = 100;
2833                 unsigned long flags;
2834
2835                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2836
2837                 spin_lock_irqsave(&priv->lock, flags);
2838                 interval = priv->beacon_int;
2839                 spin_unlock_irqrestore(&priv->lock, flags);
2840
2841                 scan->suspend_time = 0;
2842                 scan->max_out_time = cpu_to_le32(200 * 1024);
2843                 if (!interval)
2844                         interval = suspend_time;
2845                 /*
2846                  * suspend time format:
2847                  *  0-19: beacon interval in usec (time before exec.)
2848                  * 20-23: 0
2849                  * 24-31: number of beacons (suspend between channels)
2850                  */
2851
2852                 extra = (suspend_time / interval) << 24;
2853                 scan_suspend_time = 0xFF0FFFFF &
2854                     (extra | ((suspend_time % interval) * 1024));
2855
2856                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2857                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2858                                scan_suspend_time, interval);
2859         }
2860
2861         if (priv->scan_request->n_ssids) {
2862                 int i, p = 0;
2863                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2864                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2865                         /* always does wildcard anyway */
2866                         if (!priv->scan_request->ssids[i].ssid_len)
2867                                 continue;
2868                         scan->direct_scan[p].id = WLAN_EID_SSID;
2869                         scan->direct_scan[p].len =
2870                                 priv->scan_request->ssids[i].ssid_len;
2871                         memcpy(scan->direct_scan[p].ssid,
2872                                priv->scan_request->ssids[i].ssid,
2873                                priv->scan_request->ssids[i].ssid_len);
2874                         n_probes++;
2875                         p++;
2876                 }
2877                 is_active = true;
2878         } else
2879                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2880
2881         /* We don't build a direct scan probe request; the uCode will do
2882          * that based on the direct_mask added to each channel entry */
2883         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2884         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2885         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2886
2887         /* flags + rate selection */
2888
2889         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2890                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2891                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2892                 scan->good_CRC_th = 0;
2893                 band = IEEE80211_BAND_2GHZ;
2894         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2895                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2896                 /*
2897                  * If active scaning is requested but a certain channel
2898                  * is marked passive, we can do active scanning if we
2899                  * detect transmissions.
2900                  */
2901                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2902                 band = IEEE80211_BAND_5GHZ;
2903         } else {
2904                 IWL_WARN(priv, "Invalid scan band count\n");
2905                 goto done;
2906         }
2907
2908         scan->tx_cmd.len = cpu_to_le16(
2909                         iwl_fill_probe_req(priv,
2910                                 (struct ieee80211_mgmt *)scan->data,
2911                                 priv->scan_request->ie,
2912                                 priv->scan_request->ie_len,
2913                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2914
2915         /* select Rx antennas */
2916         scan->flags |= iwl3945_get_antenna_flags(priv);
2917
2918         if (iwl_is_monitor_mode(priv))
2919                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2920
2921         scan->channel_count =
2922                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2923                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2924
2925         if (scan->channel_count == 0) {
2926                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2927                 goto done;
2928         }
2929
2930         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2931             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2932         cmd.data = scan;
2933         scan->len = cpu_to_le16(cmd.len);
2934
2935         set_bit(STATUS_SCAN_HW, &priv->status);
2936         rc = iwl_send_cmd_sync(priv, &cmd);
2937         if (rc)
2938                 goto done;
2939
2940         queue_delayed_work(priv->workqueue, &priv->scan_check,
2941                            IWL_SCAN_CHECK_WATCHDOG);
2942
2943         mutex_unlock(&priv->mutex);
2944         return;
2945
2946  done:
2947         /* can not perform scan make sure we clear scanning
2948          * bits from status so next scan request can be performed.
2949          * if we dont clear scanning status bit here all next scan
2950          * will fail
2951         */
2952         clear_bit(STATUS_SCAN_HW, &priv->status);
2953         clear_bit(STATUS_SCANNING, &priv->status);
2954
2955         /* inform mac80211 scan aborted */
2956         queue_work(priv->workqueue, &priv->scan_completed);
2957         mutex_unlock(&priv->mutex);
2958 }
2959
2960 static void iwl3945_bg_up(struct work_struct *data)
2961 {
2962         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2963
2964         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2965                 return;
2966
2967         mutex_lock(&priv->mutex);
2968         __iwl3945_up(priv);
2969         mutex_unlock(&priv->mutex);
2970 }
2971
2972 static void iwl3945_bg_restart(struct work_struct *data)
2973 {
2974         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2975
2976         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2977                 return;
2978
2979         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2980                 mutex_lock(&priv->mutex);
2981                 priv->vif = NULL;
2982                 priv->is_open = 0;
2983                 mutex_unlock(&priv->mutex);
2984                 iwl3945_down(priv);
2985                 ieee80211_restart_hw(priv->hw);
2986         } else {
2987                 iwl3945_down(priv);
2988                 queue_work(priv->workqueue, &priv->up);
2989         }
2990 }
2991
2992 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2993 {
2994         struct iwl_priv *priv =
2995             container_of(data, struct iwl_priv, rx_replenish);
2996
2997         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2998                 return;
2999
3000         mutex_lock(&priv->mutex);
3001         iwl3945_rx_replenish(priv);
3002         mutex_unlock(&priv->mutex);
3003 }
3004
3005 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3006
3007 void iwl3945_post_associate(struct iwl_priv *priv)
3008 {
3009         int rc = 0;
3010         struct ieee80211_conf *conf = NULL;
3011
3012         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3013                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3014                 return;
3015         }
3016
3017
3018         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3019                         priv->assoc_id, priv->active_rxon.bssid_addr);
3020
3021         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3022                 return;
3023
3024         if (!priv->vif || !priv->is_open)
3025                 return;
3026
3027         iwl_scan_cancel_timeout(priv, 200);
3028
3029         conf = ieee80211_get_hw_conf(priv->hw);
3030
3031         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3032         iwlcore_commit_rxon(priv);
3033
3034         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3035         iwl_setup_rxon_timing(priv);
3036         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3037                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3038         if (rc)
3039                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3040                             "Attempting to continue.\n");
3041
3042         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3043
3044         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3045
3046         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3047                         priv->assoc_id, priv->beacon_int);
3048
3049         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3050                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3051         else
3052                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3053
3054         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3055                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3056                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3057                 else
3058                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3059
3060                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3061                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3062
3063         }
3064
3065         iwlcore_commit_rxon(priv);
3066
3067         switch (priv->iw_mode) {
3068         case NL80211_IFTYPE_STATION:
3069                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3070                 break;
3071
3072         case NL80211_IFTYPE_ADHOC:
3073
3074                 priv->assoc_id = 1;
3075                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3076                 iwl3945_sync_sta(priv, IWL_STA_ID,
3077                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3078                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3079                                  CMD_ASYNC);
3080                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3081                 iwl3945_send_beacon_cmd(priv);
3082
3083                 break;
3084
3085         default:
3086                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3087                            __func__, priv->iw_mode);
3088                 break;
3089         }
3090
3091         iwl_activate_qos(priv, 0);
3092
3093         /* we have just associated, don't start scan too early */
3094         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3095 }
3096
3097 /*****************************************************************************
3098  *
3099  * mac80211 entry point functions
3100  *
3101  *****************************************************************************/
3102
3103 #define UCODE_READY_TIMEOUT     (2 * HZ)
3104
3105 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3106 {
3107         struct iwl_priv *priv = hw->priv;
3108         int ret;
3109
3110         IWL_DEBUG_MAC80211(priv, "enter\n");
3111
3112         /* we should be verifying the device is ready to be opened */
3113         mutex_lock(&priv->mutex);
3114
3115         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3116          * ucode filename and max sizes are card-specific. */
3117
3118         if (!priv->ucode_code.len) {
3119                 ret = iwl3945_read_ucode(priv);
3120                 if (ret) {
3121                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3122                         mutex_unlock(&priv->mutex);
3123                         goto out_release_irq;
3124                 }
3125         }
3126
3127         ret = __iwl3945_up(priv);
3128
3129         mutex_unlock(&priv->mutex);
3130
3131         if (ret)
3132                 goto out_release_irq;
3133
3134         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3135
3136         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3137          * mac80211 will not be run successfully. */
3138         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3139                         test_bit(STATUS_READY, &priv->status),
3140                         UCODE_READY_TIMEOUT);
3141         if (!ret) {
3142                 if (!test_bit(STATUS_READY, &priv->status)) {
3143                         IWL_ERR(priv,
3144                                 "Wait for START_ALIVE timeout after %dms.\n",
3145                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3146                         ret = -ETIMEDOUT;
3147                         goto out_release_irq;
3148                 }
3149         }
3150
3151         /* ucode is running and will send rfkill notifications,
3152          * no need to poll the killswitch state anymore */
3153         cancel_delayed_work(&priv->rfkill_poll);
3154
3155         iwl_led_start(priv);
3156
3157         priv->is_open = 1;
3158         IWL_DEBUG_MAC80211(priv, "leave\n");
3159         return 0;
3160
3161 out_release_irq:
3162         priv->is_open = 0;
3163         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3164         return ret;
3165 }
3166
3167 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3168 {
3169         struct iwl_priv *priv = hw->priv;
3170
3171         IWL_DEBUG_MAC80211(priv, "enter\n");
3172
3173         if (!priv->is_open) {
3174                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3175                 return;
3176         }
3177
3178         priv->is_open = 0;
3179
3180         if (iwl_is_ready_rf(priv)) {
3181                 /* stop mac, cancel any scan request and clear
3182                  * RXON_FILTER_ASSOC_MSK BIT
3183                  */
3184                 mutex_lock(&priv->mutex);
3185                 iwl_scan_cancel_timeout(priv, 100);
3186                 mutex_unlock(&priv->mutex);
3187         }
3188
3189         iwl3945_down(priv);
3190
3191         flush_workqueue(priv->workqueue);
3192
3193         /* start polling the killswitch state again */
3194         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3195                            round_jiffies_relative(2 * HZ));
3196
3197         IWL_DEBUG_MAC80211(priv, "leave\n");
3198 }
3199
3200 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3201 {
3202         struct iwl_priv *priv = hw->priv;
3203
3204         IWL_DEBUG_MAC80211(priv, "enter\n");
3205
3206         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3207                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3208
3209         if (iwl3945_tx_skb(priv, skb))
3210                 dev_kfree_skb_any(skb);
3211
3212         IWL_DEBUG_MAC80211(priv, "leave\n");
3213         return NETDEV_TX_OK;
3214 }
3215
3216 void iwl3945_config_ap(struct iwl_priv *priv)
3217 {
3218         int rc = 0;
3219
3220         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3221                 return;
3222
3223         /* The following should be done only at AP bring up */
3224         if (!(iwl_is_associated(priv))) {
3225
3226                 /* RXON - unassoc (to set timing command) */
3227                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3228                 iwlcore_commit_rxon(priv);
3229
3230                 /* RXON Timing */
3231                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3232                 iwl_setup_rxon_timing(priv);
3233                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3234                                       sizeof(priv->rxon_timing),
3235                                       &priv->rxon_timing);
3236                 if (rc)
3237                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3238                                         "Attempting to continue.\n");
3239
3240                 /* FIXME: what should be the assoc_id for AP? */
3241                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3242                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3243                         priv->staging_rxon.flags |=
3244                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3245                 else
3246                         priv->staging_rxon.flags &=
3247                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3248
3249                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3250                         if (priv->assoc_capability &
3251                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3252                                 priv->staging_rxon.flags |=
3253                                         RXON_FLG_SHORT_SLOT_MSK;
3254                         else
3255                                 priv->staging_rxon.flags &=
3256                                         ~RXON_FLG_SHORT_SLOT_MSK;
3257
3258                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3259                                 priv->staging_rxon.flags &=
3260                                         ~RXON_FLG_SHORT_SLOT_MSK;
3261                 }
3262                 /* restore RXON assoc */
3263                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3264                 iwlcore_commit_rxon(priv);
3265                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3266         }
3267         iwl3945_send_beacon_cmd(priv);
3268
3269         /* FIXME - we need to add code here to detect a totally new
3270          * configuration, reset the AP, unassoc, rxon timing, assoc,
3271          * clear sta table, add BCAST sta... */
3272 }
3273
3274 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3275                                struct ieee80211_vif *vif,
3276                                struct ieee80211_sta *sta,
3277                                struct ieee80211_key_conf *key)
3278 {
3279         struct iwl_priv *priv = hw->priv;
3280         const u8 *addr;
3281         int ret = 0;
3282         u8 sta_id = IWL_INVALID_STATION;
3283         u8 static_key;
3284
3285         IWL_DEBUG_MAC80211(priv, "enter\n");
3286
3287         if (iwl3945_mod_params.sw_crypto) {
3288                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3289                 return -EOPNOTSUPP;
3290         }
3291
3292         addr = sta ? sta->addr : iwl_bcast_addr;
3293         static_key = !iwl_is_associated(priv);
3294
3295         if (!static_key) {
3296                 sta_id = iwl_find_station(priv, addr);
3297                 if (sta_id == IWL_INVALID_STATION) {
3298                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3299                                             addr);
3300                         return -EINVAL;
3301                 }
3302         }
3303
3304         mutex_lock(&priv->mutex);
3305         iwl_scan_cancel_timeout(priv, 100);
3306         mutex_unlock(&priv->mutex);
3307
3308         switch (cmd) {
3309         case SET_KEY:
3310                 if (static_key)
3311                         ret = iwl3945_set_static_key(priv, key);
3312                 else
3313                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3314                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3315                 break;
3316         case DISABLE_KEY:
3317                 if (static_key)
3318                         ret = iwl3945_remove_static_key(priv);
3319                 else
3320                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3321                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3322                 break;
3323         default:
3324                 ret = -EINVAL;
3325         }
3326
3327         IWL_DEBUG_MAC80211(priv, "leave\n");
3328
3329         return ret;
3330 }
3331
3332 /*****************************************************************************
3333  *
3334  * sysfs attributes
3335  *
3336  *****************************************************************************/
3337
3338 #ifdef CONFIG_IWLWIFI_DEBUG
3339
3340 /*
3341  * The following adds a new attribute to the sysfs representation
3342  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3343  * used for controlling the debug level.
3344  *
3345  * See the level definitions in iwl for details.
3346  *
3347  * The debug_level being managed using sysfs below is a per device debug
3348  * level that is used instead of the global debug level if it (the per
3349  * device debug level) is set.
3350  */
3351 static ssize_t show_debug_level(struct device *d,
3352                                 struct device_attribute *attr, char *buf)
3353 {
3354         struct iwl_priv *priv = dev_get_drvdata(d);
3355         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3356 }
3357 static ssize_t store_debug_level(struct device *d,
3358                                 struct device_attribute *attr,
3359                                  const char *buf, size_t count)
3360 {
3361         struct iwl_priv *priv = dev_get_drvdata(d);
3362         unsigned long val;
3363         int ret;
3364
3365         ret = strict_strtoul(buf, 0, &val);
3366         if (ret)
3367                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3368         else {
3369                 priv->debug_level = val;
3370                 if (iwl_alloc_traffic_mem(priv))
3371                         IWL_ERR(priv,
3372                                 "Not enough memory to generate traffic log\n");
3373         }
3374         return strnlen(buf, count);
3375 }
3376
3377 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3378                         show_debug_level, store_debug_level);
3379
3380 #endif /* CONFIG_IWLWIFI_DEBUG */
3381
3382 static ssize_t show_temperature(struct device *d,
3383                                 struct device_attribute *attr, char *buf)
3384 {
3385         struct iwl_priv *priv = dev_get_drvdata(d);
3386
3387         if (!iwl_is_alive(priv))
3388                 return -EAGAIN;
3389
3390         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3391 }
3392
3393 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3394
3395 static ssize_t show_tx_power(struct device *d,
3396                              struct device_attribute *attr, char *buf)
3397 {
3398         struct iwl_priv *priv = dev_get_drvdata(d);
3399         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3400 }
3401
3402 static ssize_t store_tx_power(struct device *d,
3403                               struct device_attribute *attr,
3404                               const char *buf, size_t count)
3405 {
3406         struct iwl_priv *priv = dev_get_drvdata(d);
3407         char *p = (char *)buf;
3408         u32 val;
3409
3410         val = simple_strtoul(p, &p, 10);
3411         if (p == buf)
3412                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3413         else
3414                 iwl3945_hw_reg_set_txpower(priv, val);
3415
3416         return count;
3417 }
3418
3419 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3420
3421 static ssize_t show_flags(struct device *d,
3422                           struct device_attribute *attr, char *buf)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425
3426         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3427 }
3428
3429 static ssize_t store_flags(struct device *d,
3430                            struct device_attribute *attr,
3431                            const char *buf, size_t count)
3432 {
3433         struct iwl_priv *priv = dev_get_drvdata(d);
3434         u32 flags = simple_strtoul(buf, NULL, 0);
3435
3436         mutex_lock(&priv->mutex);
3437         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3438                 /* Cancel any currently running scans... */
3439                 if (iwl_scan_cancel_timeout(priv, 100))
3440                         IWL_WARN(priv, "Could not cancel scan.\n");
3441                 else {
3442                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3443                                        flags);
3444                         priv->staging_rxon.flags = cpu_to_le32(flags);
3445                         iwlcore_commit_rxon(priv);
3446                 }
3447         }
3448         mutex_unlock(&priv->mutex);
3449
3450         return count;
3451 }
3452
3453 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3454
3455 static ssize_t show_filter_flags(struct device *d,
3456                                  struct device_attribute *attr, char *buf)
3457 {
3458         struct iwl_priv *priv = dev_get_drvdata(d);
3459
3460         return sprintf(buf, "0x%04X\n",
3461                 le32_to_cpu(priv->active_rxon.filter_flags));
3462 }
3463
3464 static ssize_t store_filter_flags(struct device *d,
3465                                   struct device_attribute *attr,
3466                                   const char *buf, size_t count)
3467 {
3468         struct iwl_priv *priv = dev_get_drvdata(d);
3469         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3470
3471         mutex_lock(&priv->mutex);
3472         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3473                 /* Cancel any currently running scans... */
3474                 if (iwl_scan_cancel_timeout(priv, 100))
3475                         IWL_WARN(priv, "Could not cancel scan.\n");
3476                 else {
3477                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3478                                        "0x%04X\n", filter_flags);
3479                         priv->staging_rxon.filter_flags =
3480                                 cpu_to_le32(filter_flags);
3481                         iwlcore_commit_rxon(priv);
3482                 }
3483         }
3484         mutex_unlock(&priv->mutex);
3485
3486         return count;
3487 }
3488
3489 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3490                    store_filter_flags);
3491
3492 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3493
3494 static ssize_t show_measurement(struct device *d,
3495                                 struct device_attribute *attr, char *buf)
3496 {
3497         struct iwl_priv *priv = dev_get_drvdata(d);
3498         struct iwl_spectrum_notification measure_report;
3499         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3500         u8 *data = (u8 *)&measure_report;
3501         unsigned long flags;
3502
3503         spin_lock_irqsave(&priv->lock, flags);
3504         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3505                 spin_unlock_irqrestore(&priv->lock, flags);
3506                 return 0;
3507         }
3508         memcpy(&measure_report, &priv->measure_report, size);
3509         priv->measurement_status = 0;
3510         spin_unlock_irqrestore(&priv->lock, flags);
3511
3512         while (size && (PAGE_SIZE - len)) {
3513                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3514                                    PAGE_SIZE - len, 1);
3515                 len = strlen(buf);
3516                 if (PAGE_SIZE - len)
3517                         buf[len++] = '\n';
3518
3519                 ofs += 16;
3520                 size -= min(size, 16U);
3521         }
3522
3523         return len;
3524 }
3525
3526 static ssize_t store_measurement(struct device *d,
3527                                  struct device_attribute *attr,
3528                                  const char *buf, size_t count)
3529 {
3530         struct iwl_priv *priv = dev_get_drvdata(d);
3531         struct ieee80211_measurement_params params = {
3532                 .channel = le16_to_cpu(priv->active_rxon.channel),
3533                 .start_time = cpu_to_le64(priv->last_tsf),
3534                 .duration = cpu_to_le16(1),
3535         };
3536         u8 type = IWL_MEASURE_BASIC;
3537         u8 buffer[32];
3538         u8 channel;
3539
3540         if (count) {
3541                 char *p = buffer;
3542                 strncpy(buffer, buf, min(sizeof(buffer), count));
3543                 channel = simple_strtoul(p, NULL, 0);
3544                 if (channel)
3545                         params.channel = channel;
3546
3547                 p = buffer;
3548                 while (*p && *p != ' ')
3549                       &nbs