iwlwifi: use paged Rx
[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 *pkt;
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         pkt = (struct iwl_rx_packet *)cmd.reply_page;
794         if (pkt->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(pkt->u.spectrum.status);
800         switch (spectrum_resp_status) {
801         case 0:         /* Command will be handled */
802                 if (pkt->u.spectrum.id != 0xff) {
803                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
804                                                 pkt->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         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
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 = rxb_addr(rxb);
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 = rxb_addr(rxb);
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 = rxb_addr(rxb);
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 = rxb_addr(rxb);
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->page_dma);
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 page *page;
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
1140                 if (priv->hw_params.rx_page_order > 0)
1141                         priority |= __GFP_COMP;
1142
1143                 /* Alloc a new receive buffer */
1144                 page = alloc_pages(priority, priv->hw_params.rx_page_order);
1145                 if (!page) {
1146                         if (net_ratelimit())
1147                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1148                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1149                             net_ratelimit())
1150                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1151                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1152                                          rxq->free_count);
1153                         /* We don't reschedule replenish work here -- we will
1154                          * call the restock method and if it still needs
1155                          * more buffers it will schedule replenish */
1156                         break;
1157                 }
1158
1159                 spin_lock_irqsave(&rxq->lock, flags);
1160                 if (list_empty(&rxq->rx_used)) {
1161                         spin_unlock_irqrestore(&rxq->lock, flags);
1162                         __free_pages(page, priv->hw_params.rx_page_order);
1163                         return;
1164                 }
1165                 element = rxq->rx_used.next;
1166                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1167                 list_del(element);
1168                 spin_unlock_irqrestore(&rxq->lock, flags);
1169
1170                 rxb->page = page;
1171                 /* Get physical address of RB/SKB */
1172                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1173                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1174                                 PCI_DMA_FROMDEVICE);
1175
1176                 spin_lock_irqsave(&rxq->lock, flags);
1177
1178                 list_add_tail(&rxb->list, &rxq->rx_free);
1179                 rxq->free_count++;
1180                 priv->alloc_rxb_page++;
1181
1182                 spin_unlock_irqrestore(&rxq->lock, flags);
1183         }
1184 }
1185
1186 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1187 {
1188         unsigned long flags;
1189         int i;
1190         spin_lock_irqsave(&rxq->lock, flags);
1191         INIT_LIST_HEAD(&rxq->rx_free);
1192         INIT_LIST_HEAD(&rxq->rx_used);
1193         /* Fill the rx_used queue with _all_ of the Rx buffers */
1194         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1195                 /* In the reset function, these buffers may have been allocated
1196                  * to an SKB, so we need to unmap and free potential storage */
1197                 if (rxq->pool[i].page != NULL) {
1198                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1199                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1200                                 PCI_DMA_FROMDEVICE);
1201                         priv->alloc_rxb_page--;
1202                         __free_pages(rxq->pool[i].page,
1203                                      priv->hw_params.rx_page_order);
1204                         rxq->pool[i].page = NULL;
1205                 }
1206                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1207         }
1208
1209         /* Set us so that we have processed and used all buffers, but have
1210          * not restocked the Rx queue with fresh buffers */
1211         rxq->read = rxq->write = 0;
1212         rxq->write_actual = 0;
1213         rxq->free_count = 0;
1214         spin_unlock_irqrestore(&rxq->lock, flags);
1215 }
1216
1217 void iwl3945_rx_replenish(void *data)
1218 {
1219         struct iwl_priv *priv = data;
1220         unsigned long flags;
1221
1222         iwl3945_rx_allocate(priv, GFP_KERNEL);
1223
1224         spin_lock_irqsave(&priv->lock, flags);
1225         iwl3945_rx_queue_restock(priv);
1226         spin_unlock_irqrestore(&priv->lock, flags);
1227 }
1228
1229 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1230 {
1231         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1232
1233         iwl3945_rx_queue_restock(priv);
1234 }
1235
1236
1237 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1238  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1239  * This free routine walks the list of POOL entries and if SKB is set to
1240  * non NULL it is unmapped and freed
1241  */
1242 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1243 {
1244         int i;
1245         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1246                 if (rxq->pool[i].page != NULL) {
1247                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1248                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1249                                 PCI_DMA_FROMDEVICE);
1250                         __free_pages(rxq->pool[i].page,
1251                                      priv->hw_params.rx_page_order);
1252                         rxq->pool[i].page = NULL;
1253                         priv->alloc_rxb_page--;
1254                 }
1255         }
1256
1257         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1258                             rxq->dma_addr);
1259         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1260                             rxq->rb_stts, rxq->rb_stts_dma);
1261         rxq->bd = NULL;
1262         rxq->rb_stts  = NULL;
1263 }
1264
1265
1266 /* Convert linear signal-to-noise ratio into dB */
1267 static u8 ratio2dB[100] = {
1268 /*       0   1   2   3   4   5   6   7   8   9 */
1269          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1270         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1271         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1272         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1273         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1274         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1275         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1276         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1277         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1278         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1279 };
1280
1281 /* Calculates a relative dB value from a ratio of linear
1282  *   (i.e. not dB) signal levels.
1283  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1284 int iwl3945_calc_db_from_ratio(int sig_ratio)
1285 {
1286         /* 1000:1 or higher just report as 60 dB */
1287         if (sig_ratio >= 1000)
1288                 return 60;
1289
1290         /* 100:1 or higher, divide by 10 and use table,
1291          *   add 20 dB to make up for divide by 10 */
1292         if (sig_ratio >= 100)
1293                 return 20 + (int)ratio2dB[sig_ratio/10];
1294
1295         /* We shouldn't see this */
1296         if (sig_ratio < 1)
1297                 return 0;
1298
1299         /* Use table for ratios 1:1 - 99:1 */
1300         return (int)ratio2dB[sig_ratio];
1301 }
1302
1303 #define PERFECT_RSSI (-20) /* dBm */
1304 #define WORST_RSSI (-95)   /* dBm */
1305 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1306
1307 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1308  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1309  *   about formulas used below. */
1310 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1311 {
1312         int sig_qual;
1313         int degradation = PERFECT_RSSI - rssi_dbm;
1314
1315         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1316          * as indicator; formula is (signal dbm - noise dbm).
1317          * SNR at or above 40 is a great signal (100%).
1318          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1319          * Weakest usable signal is usually 10 - 15 dB SNR. */
1320         if (noise_dbm) {
1321                 if (rssi_dbm - noise_dbm >= 40)
1322                         return 100;
1323                 else if (rssi_dbm < noise_dbm)
1324                         return 0;
1325                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1326
1327         /* Else use just the signal level.
1328          * This formula is a least squares fit of data points collected and
1329          *   compared with a reference system that had a percentage (%) display
1330          *   for signal quality. */
1331         } else
1332                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1333                             (15 * RSSI_RANGE + 62 * degradation)) /
1334                            (RSSI_RANGE * RSSI_RANGE);
1335
1336         if (sig_qual > 100)
1337                 sig_qual = 100;
1338         else if (sig_qual < 1)
1339                 sig_qual = 0;
1340
1341         return sig_qual;
1342 }
1343
1344 /**
1345  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1346  *
1347  * Uses the priv->rx_handlers callback function array to invoke
1348  * the appropriate handlers, including command responses,
1349  * frame-received notifications, and other notifications.
1350  */
1351 static void iwl3945_rx_handle(struct iwl_priv *priv)
1352 {
1353         struct iwl_rx_mem_buffer *rxb;
1354         struct iwl_rx_packet *pkt;
1355         struct iwl_rx_queue *rxq = &priv->rxq;
1356         u32 r, i;
1357         int reclaim;
1358         unsigned long flags;
1359         u8 fill_rx = 0;
1360         u32 count = 8;
1361         int total_empty = 0;
1362
1363         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1364          * buffer that the driver may process (last buffer filled by ucode). */
1365         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1366         i = rxq->read;
1367
1368         /* calculate total frames need to be restock after handling RX */
1369         total_empty = r - priv->rxq.write_actual;
1370         if (total_empty < 0)
1371                 total_empty += RX_QUEUE_SIZE;
1372
1373         if (total_empty > (RX_QUEUE_SIZE / 2))
1374                 fill_rx = 1;
1375         /* Rx interrupt, but nothing sent from uCode */
1376         if (i == r)
1377                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1378
1379         while (i != r) {
1380                 rxb = rxq->queue[i];
1381
1382                 /* If an RXB doesn't have a Rx queue slot associated with it,
1383                  * then a bug has been introduced in the queue refilling
1384                  * routines -- catch it here */
1385                 BUG_ON(rxb == NULL);
1386
1387                 rxq->queue[i] = NULL;
1388
1389                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1390                                PAGE_SIZE << priv->hw_params.rx_page_order,
1391                                PCI_DMA_FROMDEVICE);
1392                 pkt = rxb_addr(rxb);
1393
1394                 trace_iwlwifi_dev_rx(priv, pkt,
1395                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1396
1397                 /* Reclaim a command buffer only if this packet is a response
1398                  *   to a (driver-originated) command.
1399                  * If the packet (e.g. Rx frame) originated from uCode,
1400                  *   there is no command buffer to reclaim.
1401                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1402                  *   but apparently a few don't get set; catch them here. */
1403                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1404                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1405                         (pkt->hdr.cmd != REPLY_TX);
1406
1407                 /* Based on type of command response or notification,
1408                  *   handle those that need handling via function in
1409                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1410                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1411                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1412                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1413                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1414                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1415                 } else {
1416                         /* No handling needed */
1417                         IWL_DEBUG_RX(priv,
1418                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1419                                 r, i, get_cmd_string(pkt->hdr.cmd),
1420                                 pkt->hdr.cmd);
1421                 }
1422
1423                 if (reclaim) {
1424                         /* Invoke any callbacks, transfer the buffer to caller,
1425                          * and fire off the (possibly) blocking iwl_send_cmd()
1426                          * as we reclaim the driver command queue */
1427                         if (rxb && rxb->page)
1428                                 iwl_tx_cmd_complete(priv, rxb);
1429                         else
1430                                 IWL_WARN(priv, "Claim null rxb?\n");
1431                 }
1432
1433                 /* For now we just don't re-use anything.  We can tweak this
1434                  * later to try and re-use notification packets and SKBs that
1435                  * fail to Rx correctly */
1436                 if (rxb->page != NULL) {
1437                         priv->alloc_rxb_page--;
1438                         __free_pages(rxb->page, priv->hw_params.rx_page_order);
1439                         rxb->page = NULL;
1440                 }
1441
1442                 spin_lock_irqsave(&rxq->lock, flags);
1443                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1444                 spin_unlock_irqrestore(&rxq->lock, flags);
1445                 i = (i + 1) & RX_QUEUE_MASK;
1446                 /* If there are a lot of unused frames,
1447                  * restock the Rx queue so ucode won't assert. */
1448                 if (fill_rx) {
1449                         count++;
1450                         if (count >= 8) {
1451                                 priv->rxq.read = i;
1452                                 iwl3945_rx_replenish_now(priv);
1453                                 count = 0;
1454                         }
1455                 }
1456         }
1457
1458         /* Backtrack one entry */
1459         priv->rxq.read = i;
1460         if (fill_rx)
1461                 iwl3945_rx_replenish_now(priv);
1462         else
1463                 iwl3945_rx_queue_restock(priv);
1464 }
1465
1466 /* call this function to flush any scheduled tasklet */
1467 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1468 {
1469         /* wait to make sure we flush pending tasklet*/
1470         synchronize_irq(priv->pci_dev->irq);
1471         tasklet_kill(&priv->irq_tasklet);
1472 }
1473
1474 #ifdef CONFIG_IWLWIFI_DEBUG
1475 static const char *desc_lookup(int i)
1476 {
1477         switch (i) {
1478         case 1:
1479                 return "FAIL";
1480         case 2:
1481                 return "BAD_PARAM";
1482         case 3:
1483                 return "BAD_CHECKSUM";
1484         case 4:
1485                 return "NMI_INTERRUPT";
1486         case 5:
1487                 return "SYSASSERT";
1488         case 6:
1489                 return "FATAL_ERROR";
1490         }
1491
1492         return "UNKNOWN";
1493 }
1494
1495 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1496 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1497
1498 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1499 {
1500         u32 i;
1501         u32 desc, time, count, base, data1;
1502         u32 blink1, blink2, ilink1, ilink2;
1503
1504         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1505
1506         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1507                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1508                 return;
1509         }
1510
1511
1512         count = iwl_read_targ_mem(priv, base);
1513
1514         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1515                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1516                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1517                         priv->status, count);
1518         }
1519
1520         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1521                   "ilink1  nmiPC   Line\n");
1522         for (i = ERROR_START_OFFSET;
1523              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1524              i += ERROR_ELEM_SIZE) {
1525                 desc = iwl_read_targ_mem(priv, base + i);
1526                 time =
1527                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1528                 blink1 =
1529                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1530                 blink2 =
1531                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1532                 ilink1 =
1533                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1534                 ilink2 =
1535                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1536                 data1 =
1537                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1538
1539                 IWL_ERR(priv,
1540                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1541                         desc_lookup(desc), desc, time, blink1, blink2,
1542                         ilink1, ilink2, data1);
1543                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1544                                         0, blink1, blink2, ilink1, ilink2);
1545         }
1546 }
1547
1548 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1549
1550 /**
1551  * iwl3945_print_event_log - Dump error event log to syslog
1552  *
1553  */
1554 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1555                                 u32 num_events, u32 mode)
1556 {
1557         u32 i;
1558         u32 base;       /* SRAM byte address of event log header */
1559         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1560         u32 ptr;        /* SRAM byte address of log data */
1561         u32 ev, time, data; /* event log data */
1562
1563         if (num_events == 0)
1564                 return;
1565
1566         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1567
1568         if (mode == 0)
1569                 event_size = 2 * sizeof(u32);
1570         else
1571                 event_size = 3 * sizeof(u32);
1572
1573         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1574
1575         /* "time" is actually "data" for mode 0 (no timestamp).
1576          * place event id # at far right for easier visual parsing. */
1577         for (i = 0; i < num_events; i++) {
1578                 ev = iwl_read_targ_mem(priv, ptr);
1579                 ptr += sizeof(u32);
1580                 time = iwl_read_targ_mem(priv, ptr);
1581                 ptr += sizeof(u32);
1582                 if (mode == 0) {
1583                         /* data, ev */
1584                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1585                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1586                 } else {
1587                         data = iwl_read_targ_mem(priv, ptr);
1588                         ptr += sizeof(u32);
1589                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1590                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1591                 }
1592         }
1593 }
1594
1595 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1596 {
1597         u32 base;       /* SRAM byte address of event log header */
1598         u32 capacity;   /* event log capacity in # entries */
1599         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1600         u32 num_wraps;  /* # times uCode wrapped to top of log */
1601         u32 next_entry; /* index of next entry to be written by uCode */
1602         u32 size;       /* # entries that we'll print */
1603
1604         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1605         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1606                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1607                 return;
1608         }
1609
1610         /* event log header */
1611         capacity = iwl_read_targ_mem(priv, base);
1612         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1613         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1614         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1615
1616         size = num_wraps ? capacity : next_entry;
1617
1618         /* bail out if nothing in log */
1619         if (size == 0) {
1620                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1621                 return;
1622         }
1623
1624         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1625                   size, num_wraps);
1626
1627         /* if uCode has wrapped back to top of log, start at the oldest entry,
1628          * i.e the next one that uCode would fill. */
1629         if (num_wraps)
1630                 iwl3945_print_event_log(priv, next_entry,
1631                                     capacity - next_entry, mode);
1632
1633         /* (then/else) start at top of log */
1634         iwl3945_print_event_log(priv, 0, next_entry, mode);
1635
1636 }
1637 #else
1638 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1639 {
1640 }
1641
1642 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1643 {
1644 }
1645
1646 #endif
1647
1648 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1649 {
1650         u32 inta, handled = 0;
1651         u32 inta_fh;
1652         unsigned long flags;
1653 #ifdef CONFIG_IWLWIFI_DEBUG
1654         u32 inta_mask;
1655 #endif
1656
1657         spin_lock_irqsave(&priv->lock, flags);
1658
1659         /* Ack/clear/reset pending uCode interrupts.
1660          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1661          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1662         inta = iwl_read32(priv, CSR_INT);
1663         iwl_write32(priv, CSR_INT, inta);
1664
1665         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1666          * Any new interrupts that happen after this, either while we're
1667          * in this tasklet, or later, will show up in next ISR/tasklet. */
1668         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1669         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1670
1671 #ifdef CONFIG_IWLWIFI_DEBUG
1672         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1673                 /* just for debug */
1674                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1675                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1676                               inta, inta_mask, inta_fh);
1677         }
1678 #endif
1679
1680         spin_unlock_irqrestore(&priv->lock, flags);
1681
1682         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1683          * atomic, make sure that inta covers all the interrupts that
1684          * we've discovered, even if FH interrupt came in just after
1685          * reading CSR_INT. */
1686         if (inta_fh & CSR39_FH_INT_RX_MASK)
1687                 inta |= CSR_INT_BIT_FH_RX;
1688         if (inta_fh & CSR39_FH_INT_TX_MASK)
1689                 inta |= CSR_INT_BIT_FH_TX;
1690
1691         /* Now service all interrupt bits discovered above. */
1692         if (inta & CSR_INT_BIT_HW_ERR) {
1693                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1694
1695                 /* Tell the device to stop sending interrupts */
1696                 iwl_disable_interrupts(priv);
1697
1698                 priv->isr_stats.hw++;
1699                 iwl_irq_handle_error(priv);
1700
1701                 handled |= CSR_INT_BIT_HW_ERR;
1702
1703                 return;
1704         }
1705
1706 #ifdef CONFIG_IWLWIFI_DEBUG
1707         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1708                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1709                 if (inta & CSR_INT_BIT_SCD) {
1710                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1711                                       "the frame/frames.\n");
1712                         priv->isr_stats.sch++;
1713                 }
1714
1715                 /* Alive notification via Rx interrupt will do the real work */
1716                 if (inta & CSR_INT_BIT_ALIVE) {
1717                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1718                         priv->isr_stats.alive++;
1719                 }
1720         }
1721 #endif
1722         /* Safely ignore these bits for debug checks below */
1723         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1724
1725         /* Error detected by uCode */
1726         if (inta & CSR_INT_BIT_SW_ERR) {
1727                 IWL_ERR(priv, "Microcode SW error detected. "
1728                         "Restarting 0x%X.\n", inta);
1729                 priv->isr_stats.sw++;
1730                 priv->isr_stats.sw_err = inta;
1731                 iwl_irq_handle_error(priv);
1732                 handled |= CSR_INT_BIT_SW_ERR;
1733         }
1734
1735         /* uCode wakes up after power-down sleep */
1736         if (inta & CSR_INT_BIT_WAKEUP) {
1737                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1738                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1739                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1740                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1741                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1742                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1743                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1744                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1745
1746                 priv->isr_stats.wakeup++;
1747                 handled |= CSR_INT_BIT_WAKEUP;
1748         }
1749
1750         /* All uCode command responses, including Tx command responses,
1751          * Rx "responses" (frame-received notification), and other
1752          * notifications from uCode come through here*/
1753         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1754                 iwl3945_rx_handle(priv);
1755                 priv->isr_stats.rx++;
1756                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1757         }
1758
1759         if (inta & CSR_INT_BIT_FH_TX) {
1760                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1761                 priv->isr_stats.tx++;
1762
1763                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1764                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1765                                         (FH39_SRVC_CHNL), 0x0);
1766                 handled |= CSR_INT_BIT_FH_TX;
1767         }
1768
1769         if (inta & ~handled) {
1770                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1771                 priv->isr_stats.unhandled++;
1772         }
1773
1774         if (inta & ~priv->inta_mask) {
1775                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1776                          inta & ~priv->inta_mask);
1777                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1778         }
1779
1780         /* Re-enable all interrupts */
1781         /* only Re-enable if disabled by irq */
1782         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1783                 iwl_enable_interrupts(priv);
1784
1785 #ifdef CONFIG_IWLWIFI_DEBUG
1786         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1787                 inta = iwl_read32(priv, CSR_INT);
1788                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1789                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1790                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1791                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1792         }
1793 #endif
1794 }
1795
1796 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1797                                          enum ieee80211_band band,
1798                                      u8 is_active, u8 n_probes,
1799                                      struct iwl3945_scan_channel *scan_ch)
1800 {
1801         struct ieee80211_channel *chan;
1802         const struct ieee80211_supported_band *sband;
1803         const struct iwl_channel_info *ch_info;
1804         u16 passive_dwell = 0;
1805         u16 active_dwell = 0;
1806         int added, i;
1807
1808         sband = iwl_get_hw_mode(priv, band);
1809         if (!sband)
1810                 return 0;
1811
1812         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1813         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1814
1815         if (passive_dwell <= active_dwell)
1816                 passive_dwell = active_dwell + 1;
1817
1818         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1819                 chan = priv->scan_request->channels[i];
1820
1821                 if (chan->band != band)
1822                         continue;
1823
1824                 scan_ch->channel = chan->hw_value;
1825
1826                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1827                 if (!is_channel_valid(ch_info)) {
1828                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1829                                        scan_ch->channel);
1830                         continue;
1831                 }
1832
1833                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1834                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1835                 /* If passive , set up for auto-switch
1836                  *  and use long active_dwell time.
1837                  */
1838                 if (!is_active || is_channel_passive(ch_info) ||
1839                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1840                         scan_ch->type = 0;      /* passive */
1841                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1842                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1843                 } else {
1844                         scan_ch->type = 1;      /* active */
1845                 }
1846
1847                 /* Set direct probe bits. These may be used both for active
1848                  * scan channels (probes gets sent right away),
1849                  * or for passive channels (probes get se sent only after
1850                  * hearing clear Rx packet).*/
1851                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1852                         if (n_probes)
1853                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1854                 } else {
1855                         /* uCode v1 does not allow setting direct probe bits on
1856                          * passive channel. */
1857                         if ((scan_ch->type & 1) && n_probes)
1858                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1859                 }
1860
1861                 /* Set txpower levels to defaults */
1862                 scan_ch->tpc.dsp_atten = 110;
1863                 /* scan_pwr_info->tpc.dsp_atten; */
1864
1865                 /*scan_pwr_info->tpc.tx_gain; */
1866                 if (band == IEEE80211_BAND_5GHZ)
1867                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1868                 else {
1869                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1870                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1871                          * power level:
1872                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1873                          */
1874                 }
1875
1876                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1877                                scan_ch->channel,
1878                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1879                                (scan_ch->type & 1) ?
1880                                active_dwell : passive_dwell);
1881
1882                 scan_ch++;
1883                 added++;
1884         }
1885
1886         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1887         return added;
1888 }
1889
1890 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1891                               struct ieee80211_rate *rates)
1892 {
1893         int i;
1894
1895         for (i = 0; i < IWL_RATE_COUNT; i++) {
1896                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1897                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1898                 rates[i].hw_value_short = i;
1899                 rates[i].flags = 0;
1900                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1901                         /*
1902                          * If CCK != 1M then set short preamble rate flag.
1903                          */
1904                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1905                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1906                 }
1907         }
1908 }
1909
1910 /******************************************************************************
1911  *
1912  * uCode download functions
1913  *
1914  ******************************************************************************/
1915
1916 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1917 {
1918         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1919         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1920         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1921         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1922         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1923         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1924 }
1925
1926 /**
1927  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1928  *     looking at all data.
1929  */
1930 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1931 {
1932         u32 val;
1933         u32 save_len = len;
1934         int rc = 0;
1935         u32 errcnt;
1936
1937         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1938
1939         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1940                                IWL39_RTC_INST_LOWER_BOUND);
1941
1942         errcnt = 0;
1943         for (; len > 0; len -= sizeof(u32), image++) {
1944                 /* read data comes through single port, auto-incr addr */
1945                 /* NOTE: Use the debugless read so we don't flood kernel log
1946                  * if IWL_DL_IO is set */
1947                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1948                 if (val != le32_to_cpu(*image)) {
1949                         IWL_ERR(priv, "uCode INST section is invalid at "
1950                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1951                                   save_len - len, val, le32_to_cpu(*image));
1952                         rc = -EIO;
1953                         errcnt++;
1954                         if (errcnt >= 20)
1955                                 break;
1956                 }
1957         }
1958
1959
1960         if (!errcnt)
1961                 IWL_DEBUG_INFO(priv,
1962                         "ucode image in INSTRUCTION memory is good\n");
1963
1964         return rc;
1965 }
1966
1967
1968 /**
1969  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1970  *   using sample data 100 bytes apart.  If these sample points are good,
1971  *   it's a pretty good bet that everything between them is good, too.
1972  */
1973 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1974 {
1975         u32 val;
1976         int rc = 0;
1977         u32 errcnt = 0;
1978         u32 i;
1979
1980         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1981
1982         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1983                 /* read data comes through single port, auto-incr addr */
1984                 /* NOTE: Use the debugless read so we don't flood kernel log
1985                  * if IWL_DL_IO is set */
1986                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1987                         i + IWL39_RTC_INST_LOWER_BOUND);
1988                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1989                 if (val != le32_to_cpu(*image)) {
1990 #if 0 /* Enable this if you want to see details */
1991                         IWL_ERR(priv, "uCode INST section is invalid at "
1992                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1993                                   i, val, *image);
1994 #endif
1995                         rc = -EIO;
1996                         errcnt++;
1997                         if (errcnt >= 3)
1998                                 break;
1999                 }
2000         }
2001
2002         return rc;
2003 }
2004
2005
2006 /**
2007  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2008  *    and verify its contents
2009  */
2010 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2011 {
2012         __le32 *image;
2013         u32 len;
2014         int rc = 0;
2015
2016         /* Try bootstrap */
2017         image = (__le32 *)priv->ucode_boot.v_addr;
2018         len = priv->ucode_boot.len;
2019         rc = iwl3945_verify_inst_sparse(priv, image, len);
2020         if (rc == 0) {
2021                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2022                 return 0;
2023         }
2024
2025         /* Try initialize */
2026         image = (__le32 *)priv->ucode_init.v_addr;
2027         len = priv->ucode_init.len;
2028         rc = iwl3945_verify_inst_sparse(priv, image, len);
2029         if (rc == 0) {
2030                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2031                 return 0;
2032         }
2033
2034         /* Try runtime/protocol */
2035         image = (__le32 *)priv->ucode_code.v_addr;
2036         len = priv->ucode_code.len;
2037         rc = iwl3945_verify_inst_sparse(priv, image, len);
2038         if (rc == 0) {
2039                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2040                 return 0;
2041         }
2042
2043         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2044
2045         /* Since nothing seems to match, show first several data entries in
2046          * instruction SRAM, so maybe visual inspection will give a clue.
2047          * Selection of bootstrap image (vs. other images) is arbitrary. */
2048         image = (__le32 *)priv->ucode_boot.v_addr;
2049         len = priv->ucode_boot.len;
2050         rc = iwl3945_verify_inst_full(priv, image, len);
2051
2052         return rc;
2053 }
2054
2055 static void iwl3945_nic_start(struct iwl_priv *priv)
2056 {
2057         /* Remove all resets to allow NIC to operate */
2058         iwl_write32(priv, CSR_RESET, 0);
2059 }
2060
2061 /**
2062  * iwl3945_read_ucode - Read uCode images from disk file.
2063  *
2064  * Copy into buffers for card to fetch via bus-mastering
2065  */
2066 static int iwl3945_read_ucode(struct iwl_priv *priv)
2067 {
2068         const struct iwl_ucode_header *ucode;
2069         int ret = -EINVAL, index;
2070         const struct firmware *ucode_raw;
2071         /* firmware file name contains uCode/driver compatibility version */
2072         const char *name_pre = priv->cfg->fw_name_pre;
2073         const unsigned int api_max = priv->cfg->ucode_api_max;
2074         const unsigned int api_min = priv->cfg->ucode_api_min;
2075         char buf[25];
2076         u8 *src;
2077         size_t len;
2078         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2079
2080         /* Ask kernel firmware_class module to get the boot firmware off disk.
2081          * request_firmware() is synchronous, file is in memory on return. */
2082         for (index = api_max; index >= api_min; index--) {
2083                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2084                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2085                 if (ret < 0) {
2086                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2087                                   buf, ret);
2088                         if (ret == -ENOENT)
2089                                 continue;
2090                         else
2091                                 goto error;
2092                 } else {
2093                         if (index < api_max)
2094                                 IWL_ERR(priv, "Loaded firmware %s, "
2095                                         "which is deprecated. "
2096                                         " Please use API v%u instead.\n",
2097                                           buf, api_max);
2098                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2099                                        "(%zd bytes) from disk\n",
2100                                        buf, ucode_raw->size);
2101                         break;
2102                 }
2103         }
2104
2105         if (ret < 0)
2106                 goto error;
2107
2108         /* Make sure that we got at least our header! */
2109         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2110                 IWL_ERR(priv, "File size way too small!\n");
2111                 ret = -EINVAL;
2112                 goto err_release;
2113         }
2114
2115         /* Data from ucode file:  header followed by uCode images */
2116         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2117
2118         priv->ucode_ver = le32_to_cpu(ucode->ver);
2119         api_ver = IWL_UCODE_API(priv->ucode_ver);
2120         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2121         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2122         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2123         init_data_size =
2124                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2125         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2126         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2127
2128         /* api_ver should match the api version forming part of the
2129          * firmware filename ... but we don't check for that and only rely
2130          * on the API version read from firmware header from here on forward */
2131
2132         if (api_ver < api_min || api_ver > api_max) {
2133                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2134                           "Driver supports v%u, firmware is v%u.\n",
2135                           api_max, api_ver);
2136                 priv->ucode_ver = 0;
2137                 ret = -EINVAL;
2138                 goto err_release;
2139         }
2140         if (api_ver != api_max)
2141                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2142                           "got %u. New firmware can be obtained "
2143                           "from http://www.intellinuxwireless.org.\n",
2144                           api_max, api_ver);
2145
2146         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2147                 IWL_UCODE_MAJOR(priv->ucode_ver),
2148                 IWL_UCODE_MINOR(priv->ucode_ver),
2149                 IWL_UCODE_API(priv->ucode_ver),
2150                 IWL_UCODE_SERIAL(priv->ucode_ver));
2151
2152         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2153                        priv->ucode_ver);
2154         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2155                        inst_size);
2156         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2157                        data_size);
2158         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2159                        init_size);
2160         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2161                        init_data_size);
2162         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2163                        boot_size);
2164
2165
2166         /* Verify size of file vs. image size info in file's header */
2167         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2168                 inst_size + data_size + init_size +
2169                 init_data_size + boot_size) {
2170
2171                 IWL_DEBUG_INFO(priv,
2172                         "uCode file size %zd does not match expected size\n",
2173                         ucode_raw->size);
2174                 ret = -EINVAL;
2175                 goto err_release;
2176         }
2177
2178         /* Verify that uCode images will fit in card's SRAM */
2179         if (inst_size > IWL39_MAX_INST_SIZE) {
2180                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2181                                inst_size);
2182                 ret = -EINVAL;
2183                 goto err_release;
2184         }
2185
2186         if (data_size > IWL39_MAX_DATA_SIZE) {
2187                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2188                                data_size);
2189                 ret = -EINVAL;
2190                 goto err_release;
2191         }
2192         if (init_size > IWL39_MAX_INST_SIZE) {
2193                 IWL_DEBUG_INFO(priv,
2194                                 "uCode init instr len %d too large to fit in\n",
2195                                 init_size);
2196                 ret = -EINVAL;
2197                 goto err_release;
2198         }
2199         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2200                 IWL_DEBUG_INFO(priv,
2201                                 "uCode init data len %d too large to fit in\n",
2202                                 init_data_size);
2203                 ret = -EINVAL;
2204                 goto err_release;
2205         }
2206         if (boot_size > IWL39_MAX_BSM_SIZE) {
2207                 IWL_DEBUG_INFO(priv,
2208                                 "uCode boot instr len %d too large to fit in\n",
2209                                 boot_size);
2210                 ret = -EINVAL;
2211                 goto err_release;
2212         }
2213
2214         /* Allocate ucode buffers for card's bus-master loading ... */
2215
2216         /* Runtime instructions and 2 copies of data:
2217          * 1) unmodified from disk
2218          * 2) backup cache for save/restore during power-downs */
2219         priv->ucode_code.len = inst_size;
2220         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2221
2222         priv->ucode_data.len = data_size;
2223         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2224
2225         priv->ucode_data_backup.len = data_size;
2226         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2227
2228         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2229             !priv->ucode_data_backup.v_addr)
2230                 goto err_pci_alloc;
2231
2232         /* Initialization instructions and data */
2233         if (init_size && init_data_size) {
2234                 priv->ucode_init.len = init_size;
2235                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2236
2237                 priv->ucode_init_data.len = init_data_size;
2238                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2239
2240                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2241                         goto err_pci_alloc;
2242         }
2243
2244         /* Bootstrap (instructions only, no data) */
2245         if (boot_size) {
2246                 priv->ucode_boot.len = boot_size;
2247                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2248
2249                 if (!priv->ucode_boot.v_addr)
2250                         goto err_pci_alloc;
2251         }
2252
2253         /* Copy images into buffers for card's bus-master reads ... */
2254
2255         /* Runtime instructions (first block of data in file) */
2256         len = inst_size;
2257         IWL_DEBUG_INFO(priv,
2258                 "Copying (but not loading) uCode instr len %zd\n", len);
2259         memcpy(priv->ucode_code.v_addr, src, len);
2260         src += len;
2261
2262         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2263                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2264
2265         /* Runtime data (2nd block)
2266          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2267         len = data_size;
2268         IWL_DEBUG_INFO(priv,
2269                 "Copying (but not loading) uCode data len %zd\n", len);
2270         memcpy(priv->ucode_data.v_addr, src, len);
2271         memcpy(priv->ucode_data_backup.v_addr, src, len);
2272         src += len;
2273
2274         /* Initialization instructions (3rd block) */
2275         if (init_size) {
2276                 len = init_size;
2277                 IWL_DEBUG_INFO(priv,
2278                         "Copying (but not loading) init instr len %zd\n", len);
2279                 memcpy(priv->ucode_init.v_addr, src, len);
2280                 src += len;
2281         }
2282
2283         /* Initialization data (4th block) */
2284         if (init_data_size) {
2285                 len = init_data_size;
2286                 IWL_DEBUG_INFO(priv,
2287                         "Copying (but not loading) init data len %zd\n", len);
2288                 memcpy(priv->ucode_init_data.v_addr, src, len);
2289                 src += len;
2290         }
2291
2292         /* Bootstrap instructions (5th block) */
2293         len = boot_size;
2294         IWL_DEBUG_INFO(priv,
2295                 "Copying (but not loading) boot instr len %zd\n", len);
2296         memcpy(priv->ucode_boot.v_addr, src, len);
2297
2298         /* We have our copies now, allow OS release its copies */
2299         release_firmware(ucode_raw);
2300         return 0;
2301
2302  err_pci_alloc:
2303         IWL_ERR(priv, "failed to allocate pci memory\n");
2304         ret = -ENOMEM;
2305         iwl3945_dealloc_ucode_pci(priv);
2306
2307  err_release:
2308         release_firmware(ucode_raw);
2309
2310  error:
2311         return ret;
2312 }
2313
2314
2315 /**
2316  * iwl3945_set_ucode_ptrs - Set uCode address location
2317  *
2318  * Tell initialization uCode where to find runtime uCode.
2319  *
2320  * BSM registers initially contain pointers to initialization uCode.
2321  * We need to replace them to load runtime uCode inst and data,
2322  * and to save runtime data when powering down.
2323  */
2324 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2325 {
2326         dma_addr_t pinst;
2327         dma_addr_t pdata;
2328
2329         /* bits 31:0 for 3945 */
2330         pinst = priv->ucode_code.p_addr;
2331         pdata = priv->ucode_data_backup.p_addr;
2332
2333         /* Tell bootstrap uCode where to find image to load */
2334         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2335         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2336         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2337                                  priv->ucode_data.len);
2338
2339         /* Inst byte count must be last to set up, bit 31 signals uCode
2340          *   that all new ptr/size info is in place */
2341         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2342                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2343
2344         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2345
2346         return 0;
2347 }
2348
2349 /**
2350  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2351  *
2352  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2353  *
2354  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2355  */
2356 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2357 {
2358         /* Check alive response for "valid" sign from uCode */
2359         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2360                 /* We had an error bringing up the hardware, so take it
2361                  * all the way back down so we can try again */
2362                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2363                 goto restart;
2364         }
2365
2366         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2367          * This is a paranoid check, because we would not have gotten the
2368          * "initialize" alive if code weren't properly loaded.  */
2369         if (iwl3945_verify_ucode(priv)) {
2370                 /* Runtime instruction load was bad;
2371                  * take it all the way back down so we can try again */
2372                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2373                 goto restart;
2374         }
2375
2376         /* Send pointers to protocol/runtime uCode image ... init code will
2377          * load and launch runtime uCode, which will send us another "Alive"
2378          * notification. */
2379         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2380         if (iwl3945_set_ucode_ptrs(priv)) {
2381                 /* Runtime instruction load won't happen;
2382                  * take it all the way back down so we can try again */
2383                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2384                 goto restart;
2385         }
2386         return;
2387
2388  restart:
2389         queue_work(priv->workqueue, &priv->restart);
2390 }
2391
2392 /**
2393  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2394  *                   from protocol/runtime uCode (initialization uCode's
2395  *                   Alive gets handled by iwl3945_init_alive_start()).
2396  */
2397 static void iwl3945_alive_start(struct iwl_priv *priv)
2398 {
2399         int thermal_spin = 0;
2400         u32 rfkill;
2401
2402         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2403
2404         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2405                 /* We had an error bringing up the hardware, so take it
2406                  * all the way back down so we can try again */
2407                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2408                 goto restart;
2409         }
2410
2411         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2412          * This is a paranoid check, because we would not have gotten the
2413          * "runtime" alive if code weren't properly loaded.  */
2414         if (iwl3945_verify_ucode(priv)) {
2415                 /* Runtime instruction load was bad;
2416                  * take it all the way back down so we can try again */
2417                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2418                 goto restart;
2419         }
2420
2421         iwl_clear_stations_table(priv);
2422
2423         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2424         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2425
2426         if (rfkill & 0x1) {
2427                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2428                 /* if RFKILL is not on, then wait for thermal
2429                  * sensor in adapter to kick in */
2430                 while (iwl3945_hw_get_temperature(priv) == 0) {
2431                         thermal_spin++;
2432                         udelay(10);
2433                 }
2434
2435                 if (thermal_spin)
2436                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2437                                        thermal_spin * 10);
2438         } else
2439                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2440
2441         /* After the ALIVE response, we can send commands to 3945 uCode */
2442         set_bit(STATUS_ALIVE, &priv->status);
2443
2444         if (iwl_is_rfkill(priv))
2445                 return;
2446
2447         ieee80211_wake_queues(priv->hw);
2448
2449         priv->active_rate = priv->rates_mask;
2450         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2451
2452         iwl_power_update_mode(priv, false);
2453
2454         if (iwl_is_associated(priv)) {
2455                 struct iwl3945_rxon_cmd *active_rxon =
2456                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2457
2458                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2459                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2460         } else {
2461                 /* Initialize our rx_config data */
2462                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2463         }
2464
2465         /* Configure Bluetooth device coexistence support */
2466         iwl_send_bt_config(priv);
2467
2468         /* Configure the adapter for unassociated operation */
2469         iwlcore_commit_rxon(priv);
2470
2471         iwl3945_reg_txpower_periodic(priv);
2472
2473         iwl_leds_init(priv);
2474
2475         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2476         set_bit(STATUS_READY, &priv->status);
2477         wake_up_interruptible(&priv->wait_command_queue);
2478
2479         /* reassociate for ADHOC mode */
2480         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2481                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2482                                                                 priv->vif);
2483                 if (beacon)
2484                         iwl_mac_beacon_update(priv->hw, beacon);
2485         }
2486
2487         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2488                 iwl_set_mode(priv, priv->iw_mode);
2489
2490         return;
2491
2492  restart:
2493         queue_work(priv->workqueue, &priv->restart);
2494 }
2495
2496 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2497
2498 static void __iwl3945_down(struct iwl_priv *priv)
2499 {
2500         unsigned long flags;
2501         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2502         struct ieee80211_conf *conf = NULL;
2503
2504         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2505
2506         conf = ieee80211_get_hw_conf(priv->hw);
2507
2508         if (!exit_pending)
2509                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2510
2511         iwl_clear_stations_table(priv);
2512
2513         /* Unblock any waiting calls */
2514         wake_up_interruptible_all(&priv->wait_command_queue);
2515
2516         /* Wipe out the EXIT_PENDING status bit if we are not actually
2517          * exiting the module */
2518         if (!exit_pending)
2519                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2520
2521         /* stop and reset the on-board processor */
2522         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2523
2524         /* tell the device to stop sending interrupts */
2525         spin_lock_irqsave(&priv->lock, flags);
2526         iwl_disable_interrupts(priv);
2527         spin_unlock_irqrestore(&priv->lock, flags);
2528         iwl_synchronize_irq(priv);
2529
2530         if (priv->mac80211_registered)
2531                 ieee80211_stop_queues(priv->hw);
2532
2533         /* If we have not previously called iwl3945_init() then
2534          * clear all bits but the RF Kill bits and return */
2535         if (!iwl_is_init(priv)) {
2536                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2537                                         STATUS_RF_KILL_HW |
2538                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2539                                         STATUS_GEO_CONFIGURED |
2540                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2541                                         STATUS_EXIT_PENDING;
2542                 goto exit;
2543         }
2544
2545         /* ...otherwise clear out all the status bits but the RF Kill
2546          * bit and continue taking the NIC down. */
2547         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2548                                 STATUS_RF_KILL_HW |
2549                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2550                                 STATUS_GEO_CONFIGURED |
2551                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2552                                 STATUS_FW_ERROR |
2553                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2554                                 STATUS_EXIT_PENDING;
2555
2556         iwl3945_hw_txq_ctx_stop(priv);
2557         iwl3945_hw_rxq_stop(priv);
2558
2559         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2560                                 APMG_CLK_VAL_DMA_CLK_RQT);
2561
2562         udelay(5);
2563
2564         /* Stop the device, and put it in low power state */
2565         priv->cfg->ops->lib->apm_ops.stop(priv);
2566
2567  exit:
2568         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2569
2570         if (priv->ibss_beacon)
2571                 dev_kfree_skb(priv->ibss_beacon);
2572         priv->ibss_beacon = NULL;
2573
2574         /* clear out any free frames */
2575         iwl3945_clear_free_frames(priv);
2576 }
2577
2578 static void iwl3945_down(struct iwl_priv *priv)
2579 {
2580         mutex_lock(&priv->mutex);
2581         __iwl3945_down(priv);
2582         mutex_unlock(&priv->mutex);
2583
2584         iwl3945_cancel_deferred_work(priv);
2585 }
2586
2587 #define MAX_HW_RESTARTS 5
2588
2589 static int __iwl3945_up(struct iwl_priv *priv)
2590 {
2591         int rc, i;
2592
2593         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2594                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2595                 return -EIO;
2596         }
2597
2598         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2599                 IWL_ERR(priv, "ucode not available for device bring up\n");
2600                 return -EIO;
2601         }
2602
2603         /* If platform's RF_KILL switch is NOT set to KILL */
2604         if (iwl_read32(priv, CSR_GP_CNTRL) &
2605                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2606                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2607         else {
2608                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2609                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2610                 return -ENODEV;
2611         }
2612
2613         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2614
2615         rc = iwl3945_hw_nic_init(priv);
2616         if (rc) {
2617                 IWL_ERR(priv, "Unable to int nic\n");
2618                 return rc;
2619         }
2620
2621         /* make sure rfkill handshake bits are cleared */
2622         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2623         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2624                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2625
2626         /* clear (again), then enable host interrupts */
2627         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2628         iwl_enable_interrupts(priv);
2629
2630         /* really make sure rfkill handshake bits are cleared */
2631         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2632         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2633
2634         /* Copy original ucode data image from disk into backup cache.
2635          * This will be used to initialize the on-board processor's
2636          * data SRAM for a clean start when the runtime program first loads. */
2637         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2638                priv->ucode_data.len);
2639
2640         /* We return success when we resume from suspend and rf_kill is on. */
2641         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2642                 return 0;
2643
2644         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2645
2646                 iwl_clear_stations_table(priv);
2647
2648                 /* load bootstrap state machine,
2649                  * load bootstrap program into processor's memory,
2650                  * prepare to load the "initialize" uCode */
2651                 priv->cfg->ops->lib->load_ucode(priv);
2652
2653                 if (rc) {
2654                         IWL_ERR(priv,
2655                                 "Unable to set up bootstrap uCode: %d\n", rc);
2656                         continue;
2657                 }
2658
2659                 /* start card; "initialize" will load runtime ucode */
2660                 iwl3945_nic_start(priv);
2661
2662                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2663
2664                 return 0;
2665         }
2666
2667         set_bit(STATUS_EXIT_PENDING, &priv->status);
2668         __iwl3945_down(priv);
2669         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2670
2671         /* tried to restart and config the device for as long as our
2672          * patience could withstand */
2673         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2674         return -EIO;
2675 }
2676
2677
2678 /*****************************************************************************
2679  *
2680  * Workqueue callbacks
2681  *
2682  *****************************************************************************/
2683
2684 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2685 {
2686         struct iwl_priv *priv =
2687             container_of(data, struct iwl_priv, init_alive_start.work);
2688
2689         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2690                 return;
2691
2692         mutex_lock(&priv->mutex);
2693         iwl3945_init_alive_start(priv);
2694         mutex_unlock(&priv->mutex);
2695 }
2696
2697 static void iwl3945_bg_alive_start(struct work_struct *data)
2698 {
2699         struct iwl_priv *priv =
2700             container_of(data, struct iwl_priv, alive_start.work);
2701
2702         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2703                 return;
2704
2705         mutex_lock(&priv->mutex);
2706         iwl3945_alive_start(priv);
2707         mutex_unlock(&priv->mutex);
2708 }
2709
2710 /*
2711  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2712  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2713  * *is* readable even when device has been SW_RESET into low power mode
2714  * (e.g. during RF KILL).
2715  */
2716 static void iwl3945_rfkill_poll(struct work_struct *data)
2717 {
2718         struct iwl_priv *priv =
2719             container_of(data, struct iwl_priv, rfkill_poll.work);
2720         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2721         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2722                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2723
2724         if (new_rfkill != old_rfkill) {
2725                 if (new_rfkill)
2726                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2727                 else
2728                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2729
2730                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2731
2732                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2733                                 new_rfkill ? "disable radio" : "enable radio");
2734         }
2735
2736         /* Keep this running, even if radio now enabled.  This will be
2737          * cancelled in mac_start() if system decides to start again */
2738         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2739                            round_jiffies_relative(2 * HZ));
2740
2741 }
2742
2743 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2744 static void iwl3945_bg_request_scan(struct work_struct *data)
2745 {
2746         struct iwl_priv *priv =
2747             container_of(data, struct iwl_priv, request_scan);
2748         struct iwl_host_cmd cmd = {
2749                 .id = REPLY_SCAN_CMD,
2750                 .len = sizeof(struct iwl3945_scan_cmd),
2751                 .flags = CMD_SIZE_HUGE,
2752         };
2753         int rc = 0;
2754         struct iwl3945_scan_cmd *scan;
2755         struct ieee80211_conf *conf = NULL;
2756         u8 n_probes = 0;
2757         enum ieee80211_band band;
2758         bool is_active = false;
2759
2760         conf = ieee80211_get_hw_conf(priv->hw);
2761
2762         mutex_lock(&priv->mutex);
2763
2764         cancel_delayed_work(&priv->scan_check);
2765
2766         if (!iwl_is_ready(priv)) {
2767                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2768                 goto done;
2769         }
2770
2771         /* Make sure the scan wasn't canceled before this queued work
2772          * was given the chance to run... */
2773         if (!test_bit(STATUS_SCANNING, &priv->status))
2774                 goto done;
2775
2776         /* This should never be called or scheduled if there is currently
2777          * a scan active in the hardware. */
2778         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2779                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2780                                 "Ignoring second request.\n");
2781                 rc = -EIO;
2782                 goto done;
2783         }
2784
2785         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2786                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2787                 goto done;
2788         }
2789
2790         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2791                 IWL_DEBUG_HC(priv,
2792                         "Scan request while abort pending. Queuing.\n");
2793                 goto done;
2794         }
2795
2796         if (iwl_is_rfkill(priv)) {
2797                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2798                 goto done;
2799         }
2800
2801         if (!test_bit(STATUS_READY, &priv->status)) {
2802                 IWL_DEBUG_HC(priv,
2803                         "Scan request while uninitialized. Queuing.\n");
2804                 goto done;
2805         }
2806
2807         if (!priv->scan_bands) {
2808                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2809                 goto done;
2810         }
2811
2812         if (!priv->scan) {
2813                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2814                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2815                 if (!priv->scan) {
2816                         rc = -ENOMEM;
2817                         goto done;
2818                 }
2819         }
2820         scan = priv->scan;
2821         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2822
2823         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2824         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2825
2826         if (iwl_is_associated(priv)) {
2827                 u16 interval = 0;
2828                 u32 extra;
2829                 u32 suspend_time = 100;
2830                 u32 scan_suspend_time = 100;
2831                 unsigned long flags;
2832
2833                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2834
2835                 spin_lock_irqsave(&priv->lock, flags);
2836                 interval = priv->beacon_int;
2837                 spin_unlock_irqrestore(&priv->lock, flags);
2838
2839                 scan->suspend_time = 0;
2840                 scan->max_out_time = cpu_to_le32(200 * 1024);
2841                 if (!interval)
2842                         interval = suspend_time;
2843                 /*
2844                  * suspend time format:
2845                  *  0-19: beacon interval in usec (time before exec.)
2846                  * 20-23: 0
2847                  * 24-31: number of beacons (suspend between channels)
2848                  */
2849
2850                 extra = (suspend_time / interval) << 24;
2851                 scan_suspend_time = 0xFF0FFFFF &
2852                     (extra | ((suspend_time % interval) * 1024));
2853
2854                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2855                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2856                                scan_suspend_time, interval);
2857         }
2858
2859         if (priv->scan_request->n_ssids) {
2860                 int i, p = 0;
2861                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2862                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2863                         /* always does wildcard anyway */
2864                         if (!priv->scan_request->ssids[i].ssid_len)
2865                                 continue;
2866                         scan->direct_scan[p].id = WLAN_EID_SSID;
2867                         scan->direct_scan[p].len =
2868                                 priv->scan_request->ssids[i].ssid_len;
2869                         memcpy(scan->direct_scan[p].ssid,
2870                                priv->scan_request->ssids[i].ssid,
2871                                priv->scan_request->ssids[i].ssid_len);
2872                         n_probes++;
2873                         p++;
2874                 }
2875                 is_active = true;
2876         } else
2877                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2878
2879         /* We don't build a direct scan probe request; the uCode will do
2880          * that based on the direct_mask added to each channel entry */
2881         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2882         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2883         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2884
2885         /* flags + rate selection */
2886
2887         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2888                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2889                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2890                 scan->good_CRC_th = 0;
2891                 band = IEEE80211_BAND_2GHZ;
2892         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2893                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2894                 /*
2895                  * If active scaning is requested but a certain channel
2896                  * is marked passive, we can do active scanning if we
2897                  * detect transmissions.
2898                  */
2899                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2900                 band = IEEE80211_BAND_5GHZ;
2901         } else {
2902                 IWL_WARN(priv, "Invalid scan band count\n");
2903                 goto done;
2904         }
2905
2906         scan->tx_cmd.len = cpu_to_le16(
2907                         iwl_fill_probe_req(priv,
2908                                 (struct ieee80211_mgmt *)scan->data,
2909                                 priv->scan_request->ie,
2910                                 priv->scan_request->ie_len,
2911                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2912
2913         /* select Rx antennas */
2914         scan->flags |= iwl3945_get_antenna_flags(priv);
2915
2916         if (iwl_is_monitor_mode(priv))
2917                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2918
2919         scan->channel_count =
2920                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2921                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2922
2923         if (scan->channel_count == 0) {
2924                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2925                 goto done;
2926         }
2927
2928         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2929             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2930         cmd.data = scan;
2931         scan->len = cpu_to_le16(cmd.len);
2932
2933         set_bit(STATUS_SCAN_HW, &priv->status);
2934         rc = iwl_send_cmd_sync(priv, &cmd);
2935         if (rc)
2936                 goto done;
2937
2938         queue_delayed_work(priv->workqueue, &priv->scan_check,
2939                            IWL_SCAN_CHECK_WATCHDOG);
2940
2941         mutex_unlock(&priv->mutex);
2942         return;
2943
2944  done:
2945         /* can not perform scan make sure we clear scanning
2946          * bits from status so next scan request can be performed.
2947          * if we dont clear scanning status bit here all next scan
2948          * will fail
2949         */
2950         clear_bit(STATUS_SCAN_HW, &priv->status);
2951         clear_bit(STATUS_SCANNING, &priv->status);
2952
2953         /* inform mac80211 scan aborted */
2954         queue_work(priv->workqueue, &priv->scan_completed);
2955         mutex_unlock(&priv->mutex);
2956 }
2957
2958 static void iwl3945_bg_up(struct work_struct *data)
2959 {
2960         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2961
2962         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2963                 return;
2964
2965         mutex_lock(&priv->mutex);
2966         __iwl3945_up(priv);
2967         mutex_unlock(&priv->mutex);
2968 }
2969
2970 static void iwl3945_bg_restart(struct work_struct *data)
2971 {
2972         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2973
2974         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2975                 return;
2976
2977         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2978                 mutex_lock(&priv->mutex);
2979                 priv->vif = NULL;
2980                 priv->is_open = 0;
2981                 mutex_unlock(&priv->mutex);
2982                 iwl3945_down(priv);
2983                 ieee80211_restart_hw(priv->hw);
2984         } else {
2985                 iwl3945_down(priv);
2986                 queue_work(priv->workqueue, &priv->up);
2987         }
2988 }
2989
2990 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2991 {
2992         struct iwl_priv *priv =
2993             container_of(data, struct iwl_priv, rx_replenish);
2994
2995         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2996                 return;
2997
2998         mutex_lock(&priv->mutex);
2999         iwl3945_rx_replenish(priv);
3000         mutex_unlock(&priv->mutex);
3001 }
3002
3003 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3004
3005 void iwl3945_post_associate(struct iwl_priv *priv)
3006 {
3007         int rc = 0;
3008         struct ieee80211_conf *conf = NULL;
3009
3010         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3011                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3012                 return;
3013         }
3014
3015
3016         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3017                         priv->assoc_id, priv->active_rxon.bssid_addr);
3018
3019         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3020                 return;
3021
3022         if (!priv->vif || !priv->is_open)
3023                 return;
3024
3025         iwl_scan_cancel_timeout(priv, 200);
3026
3027         conf = ieee80211_get_hw_conf(priv->hw);
3028
3029         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3030         iwlcore_commit_rxon(priv);
3031
3032         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3033         iwl_setup_rxon_timing(priv);
3034         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3035                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3036         if (rc)
3037                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3038                             "Attempting to continue.\n");
3039
3040         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3041
3042         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3043
3044         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3045                         priv->assoc_id, priv->beacon_int);
3046
3047         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3048                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3049         else
3050                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3051
3052         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3053                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3054                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3055                 else
3056                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3057
3058                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3059                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3060
3061         }
3062
3063         iwlcore_commit_rxon(priv);
3064
3065         switch (priv->iw_mode) {
3066         case NL80211_IFTYPE_STATION:
3067                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3068                 break;
3069
3070         case NL80211_IFTYPE_ADHOC:
3071
3072                 priv->assoc_id = 1;
3073                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3074                 iwl3945_sync_sta(priv, IWL_STA_ID,
3075                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3076                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3077                                  CMD_ASYNC);
3078                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3079                 iwl3945_send_beacon_cmd(priv);
3080
3081                 break;
3082
3083         default:
3084                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3085                            __func__, priv->iw_mode);
3086                 break;
3087         }
3088
3089         iwl_activate_qos(priv, 0);
3090
3091         /* we have just associated, don't start scan too early */
3092         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3093 }
3094
3095 /*****************************************************************************
3096  *
3097  * mac80211 entry point functions
3098  *
3099  *****************************************************************************/
3100
3101 #define UCODE_READY_TIMEOUT     (2 * HZ)
3102
3103 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3104 {
3105         struct iwl_priv *priv = hw->priv;
3106         int ret;
3107
3108         IWL_DEBUG_MAC80211(priv, "enter\n");
3109
3110         /* we should be verifying the device is ready to be opened */
3111         mutex_lock(&priv->mutex);
3112
3113         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3114          * ucode filename and max sizes are card-specific. */
3115
3116         if (!priv->ucode_code.len) {
3117                 ret = iwl3945_read_ucode(priv);
3118                 if (ret) {
3119                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3120                         mutex_unlock(&priv->mutex);
3121                         goto out_release_irq;
3122                 }
3123         }
3124
3125         ret = __iwl3945_up(priv);
3126
3127         mutex_unlock(&priv->mutex);
3128
3129         if (ret)
3130                 goto out_release_irq;
3131
3132         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3133
3134         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3135          * mac80211 will not be run successfully. */
3136         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3137                         test_bit(STATUS_READY, &priv->status),
3138                         UCODE_READY_TIMEOUT);
3139         if (!ret) {
3140                 if (!test_bit(STATUS_READY, &priv->status)) {
3141                         IWL_ERR(priv,
3142                                 "Wait for START_ALIVE timeout after %dms.\n",
3143                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3144                         ret = -ETIMEDOUT;
3145                         goto out_release_irq;
3146                 }
3147         }
3148
3149         /* ucode is running and will send rfkill notifications,
3150          * no need to poll the killswitch state anymore */
3151         cancel_delayed_work(&priv->rfkill_poll);
3152
3153         iwl_led_start(priv);
3154
3155         priv->is_open = 1;
3156         IWL_DEBUG_MAC80211(priv, "leave\n");
3157         return 0;
3158
3159 out_release_irq:
3160         priv->is_open = 0;
3161         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3162         return ret;
3163 }
3164
3165 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3166 {
3167         struct iwl_priv *priv = hw->priv;
3168
3169         IWL_DEBUG_MAC80211(priv, "enter\n");
3170
3171         if (!priv->is_open) {
3172                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3173                 return;
3174         }
3175
3176         priv->is_open = 0;
3177
3178         if (iwl_is_ready_rf(priv)) {
3179                 /* stop mac, cancel any scan request and clear
3180                  * RXON_FILTER_ASSOC_MSK BIT
3181                  */
3182                 mutex_lock(&priv->mutex);
3183                 iwl_scan_cancel_timeout(priv, 100);
3184                 mutex_unlock(&priv->mutex);
3185         }
3186
3187         iwl3945_down(priv);
3188
3189         flush_workqueue(priv->workqueue);
3190
3191         /* start polling the killswitch state again */
3192         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3193                            round_jiffies_relative(2 * HZ));
3194
3195         IWL_DEBUG_MAC80211(priv, "leave\n");
3196 }
3197
3198 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3199 {
3200         struct iwl_priv *priv = hw->priv;
3201
3202         IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3205                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3206
3207         if (iwl3945_tx_skb(priv, skb))
3208                 dev_kfree_skb_any(skb);
3209
3210         IWL_DEBUG_MAC80211(priv, "leave\n");
3211         return NETDEV_TX_OK;
3212 }
3213
3214 void iwl3945_config_ap(struct iwl_priv *priv)
3215 {
3216         int rc = 0;
3217
3218         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3219                 return;
3220
3221         /* The following should be done only at AP bring up */
3222         if (!(iwl_is_associated(priv))) {
3223
3224                 /* RXON - unassoc (to set timing command) */
3225                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3226                 iwlcore_commit_rxon(priv);
3227
3228                 /* RXON Timing */
3229                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3230                 iwl_setup_rxon_timing(priv);
3231                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3232                                       sizeof(priv->rxon_timing),
3233                                       &priv->rxon_timing);
3234                 if (rc)
3235                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3236                                         "Attempting to continue.\n");
3237
3238                 /* FIXME: what should be the assoc_id for AP? */
3239                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3240                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3241                         priv->staging_rxon.flags |=
3242                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3243                 else
3244                         priv->staging_rxon.flags &=
3245                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3246
3247                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3248                         if (priv->assoc_capability &
3249                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3250                                 priv->staging_rxon.flags |=
3251                                         RXON_FLG_SHORT_SLOT_MSK;
3252                         else
3253                                 priv->staging_rxon.flags &=
3254                                         ~RXON_FLG_SHORT_SLOT_MSK;
3255
3256                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3257                                 priv->staging_rxon.flags &=
3258                                         ~RXON_FLG_SHORT_SLOT_MSK;
3259                 }
3260                 /* restore RXON assoc */
3261                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3262                 iwlcore_commit_rxon(priv);
3263                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3264         }
3265         iwl3945_send_beacon_cmd(priv);
3266
3267         /* FIXME - we need to add code here to detect a totally new
3268          * configuration, reset the AP, unassoc, rxon timing, assoc,
3269          * clear sta table, add BCAST sta... */
3270 }
3271
3272 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3273                                struct ieee80211_vif *vif,
3274                                struct ieee80211_sta *sta,
3275                                struct ieee80211_key_conf *key)
3276 {
3277         struct iwl_priv *priv = hw->priv;
3278         const u8 *addr;
3279         int ret = 0;
3280         u8 sta_id = IWL_INVALID_STATION;
3281         u8 static_key;
3282
3283         IWL_DEBUG_MAC80211(priv, "enter\n");
3284
3285         if (iwl3945_mod_params.sw_crypto) {
3286                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3287                 return -EOPNOTSUPP;
3288         }
3289
3290         addr = sta ? sta->addr : iwl_bcast_addr;
3291         static_key = !iwl_is_associated(priv);
3292
3293         if (!static_key) {
3294                 sta_id = iwl_find_station(priv, addr);
3295                 if (sta_id == IWL_INVALID_STATION) {
3296                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3297                                             addr);
3298                         return -EINVAL;
3299                 }
3300         }
3301
3302         mutex_lock(&priv->mutex);
3303         iwl_scan_cancel_timeout(priv, 100);
3304         mutex_unlock(&priv->mutex);
3305
3306         switch (cmd) {
3307         case SET_KEY:
3308                 if (static_key)
3309                         ret = iwl3945_set_static_key(priv, key);
3310                 else
3311                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3312                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3313                 break;
3314         case DISABLE_KEY:
3315                 if (static_key)
3316                         ret = iwl3945_remove_static_key(priv);
3317                 else
3318                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3319                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3320                 break;
3321         default:
3322                 ret = -EINVAL;
3323         }
3324
3325         IWL_DEBUG_MAC80211(priv, "leave\n");
3326
3327         return ret;
3328 }
3329
3330 /*****************************************************************************
3331  *
3332  * sysfs attributes
3333  *
3334  *****************************************************************************/
3335
3336 #ifdef CONFIG_IWLWIFI_DEBUG
3337
3338 /*
3339  * The following adds a new attribute to the sysfs representation
3340  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3341  * used for controlling the debug level.
3342  *
3343  * See the level definitions in iwl for details.
3344  *
3345  * The debug_level being managed using sysfs below is a per device debug
3346  * level that is used instead of the global debug level if it (the per
3347  * device debug level) is set.
3348  */
3349 static ssize_t show_debug_level(struct device *d,
3350                                 struct device_attribute *attr, char *buf)
3351 {
3352         struct iwl_priv *priv = dev_get_drvdata(d);
3353         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3354 }
3355 static ssize_t store_debug_level(struct device *d,
3356                                 struct device_attribute *attr,
3357                                  const char *buf, size_t count)
3358 {
3359         struct iwl_priv *priv = dev_get_drvdata(d);
3360         unsigned long val;
3361         int ret;
3362
3363         ret = strict_strtoul(buf, 0, &val);
3364         if (ret)
3365                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3366         else {
3367                 priv->debug_level = val;
3368                 if (iwl_alloc_traffic_mem(priv))
3369                         IWL_ERR(priv,
3370                                 "Not enough memory to generate traffic log\n");
3371         }
3372         return strnlen(buf, count);
3373 }
3374
3375 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3376                         show_debug_level, store_debug_level);
3377
3378 #endif /* CONFIG_IWLWIFI_DEBUG */
3379
3380 static ssize_t show_temperature(struct device *d,
3381                                 struct device_attribute *attr, char *buf)
3382 {
3383         struct iwl_priv *priv = dev_get_drvdata(d);
3384
3385         if (!iwl_is_alive(priv))
3386                 return -EAGAIN;
3387
3388         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3389 }
3390
3391 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3392
3393 static ssize_t show_tx_power(struct device *d,
3394                              struct device_attribute *attr, char *buf)
3395 {
3396         struct iwl_priv *priv = dev_get_drvdata(d);
3397         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3398 }
3399
3400 static ssize_t store_tx_power(struct device *d,
3401                               struct device_attribute *attr,
3402                               const char *buf, size_t count)
3403 {
3404         struct iwl_priv *priv = dev_get_drvdata(d);
3405         char *p = (char *)buf;
3406         u32 val;
3407
3408         val = simple_strtoul(p, &p, 10);
3409         if (p == buf)
3410                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3411         else
3412                 iwl3945_hw_reg_set_txpower(priv, val);
3413
3414         return count;
3415 }
3416
3417 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3418
3419 static ssize_t show_flags(struct device *d,
3420                           struct device_attribute *attr, char *buf)
3421 {
3422         struct iwl_priv *priv = dev_get_drvdata(d);
3423
3424         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3425 }
3426
3427 static ssize_t store_flags(struct device *d,
3428                            struct device_attribute *attr,
3429                            const char *buf, size_t count)
3430 {
3431         struct iwl_priv *priv = dev_get_drvdata(d);
3432         u32 flags = simple_strtoul(buf, NULL, 0);
3433
3434         mutex_lock(&priv->mutex);
3435         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3436                 /* Cancel any currently running scans... */
3437                 if (iwl_scan_cancel_timeout(priv, 100))
3438                         IWL_WARN(priv, "Could not cancel scan.\n");
3439                 else {
3440                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3441                                        flags);
3442                         priv->staging_rxon.flags = cpu_to_le32(flags);
3443                         iwlcore_commit_rxon(priv);
3444                 }
3445         }
3446         mutex_unlock(&priv->mutex);
3447
3448         return count;
3449 }
3450
3451 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3452
3453 static ssize_t show_filter_flags(struct device *d,
3454                                  struct device_attribute *attr, char *buf)
3455 {
3456         struct iwl_priv *priv = dev_get_drvdata(d);
3457
3458         return sprintf(buf, "0x%04X\n",
3459                 le32_to_cpu(priv->active_rxon.filter_flags));
3460 }
3461
3462 static ssize_t store_filter_flags(struct device *d,
3463                                   struct device_attribute *attr,
3464                                   const char *buf, size_t count)
3465 {
3466         struct iwl_priv *priv = dev_get_drvdata(d);
3467         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3468
3469         mutex_lock(&priv->mutex);
3470         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3471                 /* Cancel any currently running scans... */
3472                 if (iwl_scan_cancel_timeout(priv, 100))
3473                         IWL_WARN(priv, "Could not cancel scan.\n");
3474                 else {
3475                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3476                                        "0x%04X\n", filter_flags);
3477                         priv->staging_rxon.filter_flags =
3478                                 cpu_to_le32(filter_flags);
3479                         iwlcore_commit_rxon(priv);
3480                 }
3481         }
3482         mutex_unlock(&priv->mutex);
3483
3484         return count;
3485 }
3486
3487 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3488                    store_filter_flags);
3489
3490 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3491
3492 static ssize_t show_measurement(struct device *d,
3493                                 struct device_attribute *attr, char *buf)
3494 {
3495         struct iwl_priv *priv = dev_get_drvdata(d);
3496         struct iwl_spectrum_notification measure_report;
3497         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3498         u8 *data = (u8 *)&measure_report;
3499         unsigned long flags;
3500
3501         spin_lock_irqsave(&priv->lock, flags);
3502         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3503                 spin_unlock_irqrestore(&priv->lock, flags);
3504                 return 0;
3505         }
3506         memcpy(&measure_report, &priv->measure_report, size);
3507         priv->measurement_status = 0;
3508         spin_unlock_irqrestore(&priv->lock, flags);
3509
3510         while (size && (PAGE_SIZE - len)) {
3511                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3512                                    PAGE_SIZE - len, 1);
3513                 len = strlen(buf);
3514                 if (PAGE_SIZE - len)
3515                         buf[len++] = '\n';
3516
3517                 ofs += 16;
3518                 size -= min(size, 16U);
3519         }
3520
3521         return len;
3522 }
3523
3524 static ssize_t store_measurement(struct device *d,
3525                                  struct device_attribute *attr,
3526                                  const char *buf, size_t count)
3527 {
3528         struct iwl_priv *priv = dev_get_drvdata(d);
3529         struct ieee80211_measurement_params params = {
3530                 .channel = le16_to_cpu(priv->active_rxon.channel),
3531                 .start_time = cpu_to_le64(priv->last_tsf),
3532                 .duration = cpu_to_le16(1),
3533         };
3534         u8 type = IWL_MEASURE_BASIC;
3535         u8 buffer[32];
3536         u8 channel;
3537
3538         if (count) {
3539                 char *p = buffer;
3540                 strncpy(buffer, buf, min(sizeof(buffer), count));
3541                 channel = simple_strtoul(p, NULL, 0);
3542                 if (channel)
3543                         params.channel = channel;
3544
3545                 p = buffer;
3546                 while (*p && *p != ' ')
3547                         p++;
3548                 if (*p)
3549                         type = simple_strtoul(p + 1, NULL, 0);
3550         }
3551
3552         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3553                        "channel %d (for '%s')\n", type, params.channel, buf);
3554         iwl3945_get_measurement(priv, &params, type);
3555
3556         return count;
3557 }
3558
3559 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3560                    show_measurement, store_measurement);
3561 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3562
3563 static ssize_t store_retry_rate(struct device *d,
3564                                 struct device_attribute *attr,
3565                                 const char *buf, size_t count)
3566 {
3567         struct iwl_priv *priv = dev_get_drvdata(d);
3568
3569         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3570         if (priv->retry_rate <= 0)
3571                 priv->retry_rate = 1;
3572
3573         return count;
3574 }
3575
3576 static ssize_t show_retry_rate(struct device *d,
3577                                struct device_attribute *attr, char *buf)
3578 {
3579         struct iwl_priv *priv = dev_get_drvdata(d);
3580         return sprintf(buf, "%d", priv->retry_rate);
3581 }
3582
3583 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3584                    store_retry_rate);
3585
3586
3587 static ssize_t show_channels(struct device *d,
3588                              struct device_attribute *attr, char *buf)
3589 {
3590         /* all this shit doesn't belong into sysfs anyway */
3591         return 0;
3592 }
3593
3594 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3595
3596 static ssize_t show_statistics(struct device *d,
3597                                struct device_attribute *attr, char *buf)
3598 {
3599         struct iwl_priv *priv = dev_get_drvdata(d);
3600         u32 size = sizeof(struct iwl3945_notif_statistics);
3601         u32 len = 0, ofs = 0;
3602         u8 *data = (u8 *)&priv->statistics_39;
3603         int rc = 0;
3604
3605         if (!iwl_is_alive(priv))
3606                 return -EAGAIN;
3607
3608         mutex_lock(&priv->mutex);
3609         rc = iwl_send_statistics_request(priv, 0);
3610         mutex_unlock(&priv->mutex);
3611
3612         if (rc) {
3613                 len = sprintf(buf,
3614                               "Error sending statistics request: 0x%08X\n", rc);
3615                 return len;
3616         }
3617
3618         while (size && (PAGE_SIZE - len)) {
3619                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3620                                    PAGE_SIZE - len, 1);
3621                 len = strlen(buf);
3622                 if (PAGE_SIZE - len)
3623                         buf[len++] = '\n';
3624
3625                 ofs += 16;
3626                 size -= min(size, 16U);
3627         }
3628
3629         return len;
3630 }
3631
3632 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3633
3634 static ssize_t show_antenna(struct device *d,
3635                             struct device_attribute *attr, char *buf)
3636 {
3637         struct iwl_priv *priv = dev_get_drvdata(d);
3638
3639         if (!iwl_is_alive(priv))
3640                 return -EAGAIN;
3641
3642         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3643 }
3644
3645 static ssize_t store_antenna(struct device *d,
3646                              struct device_attribute *attr,
3647                              const char *buf, size_t count)
3648 {
3649         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3650         int ant;
3651
3652         if (count == 0)
3653                 return 0;
3654
3655         if (sscanf(buf, "%1i", &ant) != 1) {
3656                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3657                 return count;
3658         }
3659
3660         if ((ant >= 0) && (ant <= 2)) {
3661                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3662                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3663         } else
3664                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3665
3666
3667         return count;
3668 }
3669
3670 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3671
3672 static ssize_t show_status(struct device *d,
3673                            struct device_attribute *attr, char *buf)
3674 {
3675         struct iwl_priv *priv = dev_get_drvdata(d);
3676         if (!iwl_is_alive(priv))
3677                 return -EAGAIN;
3678         return sprintf(buf, "0x%08x\n", (int)priv->status);
3679 }
3680
3681 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3682
3683 static ssize_t dump_error_log(struct device *d,
3684                               struct device_attribute *attr,
3685                               const char *buf, size_t count)
3686 {
3687         struct iwl_priv *priv = dev_get_drvdata(d);
3688         char *p = (char *)buf;
3689
3690         if (p[0] == '1')
3691                 iwl3945_dump_nic_error_log(priv);
3692
3693         return strnlen(buf, count);
3694 }
3695
3696 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3697
3698 /*****************************************************************************
3699  *
3700  * driver setup and tear down
3701  *
3702  *****************************************************************************/
3703
3704 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3705 {
3706         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3707
3708         init_waitqueue_head(&priv->wait_command_queue);
3709
3710         INIT_WORK(&priv->up, iwl3945_bg_up);
3711         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3712         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3713         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3714         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3715         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3716         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3717         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3718         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3719         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3720         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3721
3722         iwl3945_hw_setup_deferred_work(priv);
3723
3724         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3725                      iwl3945_irq_tasklet, (unsigned long)priv);
3726 }
3727
3728 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3729 {
3730         iwl3945_hw_cancel_deferred_work(priv);
3731
3732         cancel_delayed_work_sync(&priv->init_alive_start);
3733         cancel_delayed_work(&priv->scan_check);
3734         cancel_delayed_work(&priv->alive_start);
3735         cancel_work_sync(&priv->beacon_update);
3736 }
3737
3738 static struct attribute *iwl3945_sysfs_entries[] = {
3739         &dev_attr_antenna.attr,
3740         &dev_attr_channels.attr,
3741         &dev_attr_dump_errors.attr,
3742         &dev_attr_flags.attr,
3743         &dev_attr_filter_flags.attr,
3744 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3745         &dev_attr_measurement.attr,
3746 #endif
3747         &dev_attr_retry_rate.attr,
3748         &dev_attr_statistics.attr,
3749         &dev_attr_status.attr,
3750         &dev_attr_temperature.attr,
3751         &dev_attr_tx_power.attr,
3752 #ifdef CONFIG_IWLWIFI_DEBUG
3753         &dev_attr_debug_level.attr,
3754 #endif
3755         NULL
3756 };
3757
3758 static struct attribute_group iwl3945_attribute_group = {
3759         .name = NULL,           /* put in device directory */
3760         .attrs = iwl3945_sysfs_entries,
3761 };
3762
3763 static struct ieee80211_ops iwl3945_hw_ops = {
3764         .tx = iwl3945_mac_tx,
3765         .start = iwl3945_mac_start,
3766         .stop = iwl3945_mac_stop,
3767         .add_interface = iwl_mac_add_interface,
3768         .remove_interface = iwl_mac_remove_interface,
3769         .config = iwl_mac_config,
3770         .configure_filter = iwl_configure_filter,
3771         .set_key = iwl3945_mac_set_key,
3772         .get_tx_stats = iwl_mac_get_tx_stats,
3773         .conf_tx = iwl_mac_conf_tx,
3774         .reset_tsf = iwl_mac_reset_tsf,
3775         .bss_info_changed = iwl_bss_info_changed,
3776         .hw_scan = iwl_mac_hw_scan
3777 };
3778
3779 static int iwl3945_init_drv(struct iwl_priv *priv)
3780 {
3781         int ret;
3782         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3783
3784         priv->retry_rate = 1;
3785         priv->ibss_beacon = NULL;
3786
3787         spin_lock_init(&priv->lock);
3788         spin_lock_init(&priv->sta_lock);
3789         spin_lock_init(&priv->hcmd_lock);
3790
3791         INIT_LIST_HEAD(&priv->free_frames);
3792
3793         mutex_init(&priv->mutex);
3794
3795         /* Clear the driver's (not device's) station table */
3796         iwl_clear_stations_table(priv);
3797
3798         priv->ieee_channels = NULL;
3799         priv->ieee_rates = NULL;
3800         priv->band = IEEE80211_BAND_2GHZ;
3801
3802         priv->iw_mode = NL80211_IFTYPE_STATION;
3803
3804         iwl_reset_qos(priv);
3805
3806         priv->qos_data.qos_active = 0;
3807         priv->qos_data.qos_cap.val = 0;
3808
3809         priv->rates_mask = IWL_RATES_MASK;
3810         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3811
3812         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3813                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3814                          eeprom->version);
3815                 ret = -EINVAL;
3816                 goto err;
3817         }
3818         ret = iwl_init_channel_map(priv);
3819         if (ret) {
3820                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3821                 goto err;
3822         }
3823
3824         /* Set up txpower settings in driver for all channels */
3825         if (iwl3945_txpower_set_from_eeprom(priv)) {
3826                 ret = -EIO;
3827                 goto err_free_channel_map;
3828         }
3829
3830         ret = iwlcore_init_geos(priv);
3831         if (ret) {
3832                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3833                 goto err_free_channel_map;
3834         }
3835         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3836
3837         return 0;
3838
3839 err_free_channel_map:
3840         iwl_free_channel_map(priv);
3841 err:
3842         return ret;
3843 }
3844
3845 static int iwl3945_setup_mac(struct iwl_priv *priv)
3846 {
3847         int ret;
3848         struct ieee80211_hw *hw = priv->hw;
3849
3850         hw->rate_control_algorithm = "iwl-3945-rs";
3851         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3852
3853         /* Tell mac80211 our characteristics */
3854         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3855                     IEEE80211_HW_NOISE_DBM |
3856                     IEEE80211_HW_SPECTRUM_MGMT |
3857                     IEEE80211_HW_SUPPORTS_PS |
3858                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3859
3860         hw->wiphy->interface_modes =
3861                 BIT(NL80211_IFTYPE_STATION) |
3862                 BIT(NL80211_IFTYPE_ADHOC);
3863
3864         hw->wiphy->custom_regulatory = true;
3865
3866         /* Firmware does not support this */
3867         hw->wiphy->disable_beacon_hints = true;
3868
3869         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3870         /* we create the 802.11 header and a zero-length SSID element */
3871         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3872
3873         /* Default value; 4 EDCA QOS priorities */
3874         hw->queues = 4;
3875
3876         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3877                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3878                         &priv->bands[IEEE80211_BAND_2GHZ];
3879
3880         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3881                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3882                         &priv->bands[IEEE80211_BAND_5GHZ];
3883
3884         ret = ieee80211_register_hw(priv->hw);
3885         if (ret) {
3886                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3887                 return ret;
3888         }
3889         priv->mac80211_registered = 1;
3890
3891         return 0;
3892 }
3893
3894 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3895 {
3896         int err = 0;
3897         struct iwl_priv *priv;
3898         struct ieee80211_hw *hw;
3899         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3900         struct iwl3945_eeprom *eeprom;
3901         unsigned long flags;
3902
3903         /***********************
3904          * 1. Allocating HW data
3905          * ********************/
3906
3907         /* mac80211 allocates memory for this device instance, including
3908          *   space for this driver's private structure */
3909         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3910         if (hw == NULL) {
3911                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3912                 err = -ENOMEM;
3913                 goto out;
3914         }
3915         priv = hw->priv;
3916         SET_IEEE80211_DEV(hw, &pdev->dev);
3917
3918         /*
3919          * Disabling hardware scan means that mac80211 will perform scans
3920          * "the hard way", rather than using device's scan.
3921          */
3922         if (iwl3945_mod_params.disable_hw_scan) {
3923                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3924                 iwl3945_hw_ops.hw_scan = NULL;
3925         }
3926
3927
3928         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3929         priv->cfg = cfg;
3930         priv->pci_dev = pdev;
3931         priv->inta_mask = CSR_INI_SET_MASK;
3932
3933 #ifdef CONFIG_IWLWIFI_DEBUG
3934         atomic_set(&priv->restrict_refcnt, 0);
3935 #endif
3936         if (iwl_alloc_traffic_mem(priv))
3937                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3938
3939         /***************************
3940          * 2. Initializing PCI bus
3941          * *************************/
3942         if (pci_enable_device(pdev)) {
3943                 err = -ENODEV;
3944                 goto out_ieee80211_free_hw;
3945         }
3946
3947         pci_set_master(pdev);
3948
3949         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3950         if (!err)
3951                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3952         if (err) {
3953                 IWL_WARN(priv, "No suitable DMA available.\n");
3954                 goto out_pci_disable_device;
3955         }
3956
3957         pci_set_drvdata(pdev, priv);
3958         err = pci_request_regions(pdev, DRV_NAME);
3959         if (err)
3960                 goto out_pci_disable_device;
3961
3962         /***********************
3963          * 3. Read REV Register
3964          * ********************/
3965         priv->hw_base = pci_iomap(pdev, 0, 0);
3966         if (!priv->hw_base) {
3967                 err = -ENODEV;
3968                 goto out_pci_release_regions;
3969         }
3970
3971         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3972                         (unsigned long long) pci_resource_len(pdev, 0));
3973         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3974
3975         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3976          * PCI Tx retries from interfering with C3 CPU state */
3977         pci_write_config_byte(pdev, 0x41, 0x00);
3978
3979         /* this spin lock will be used in apm_ops.init and EEPROM access
3980          * we should init now
3981          */
3982         spin_lock_init(&priv->reg_lock);
3983
3984         /* amp init */
3985         err = priv->cfg->ops->lib->apm_ops.init(priv);
3986         if (err < 0) {
3987                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3988                 goto out_iounmap;
3989         }
3990
3991         /***********************
3992          * 4. Read EEPROM
3993          * ********************/
3994
3995         /* Read the EEPROM */
3996         err = iwl_eeprom_init(priv);
3997         if (err) {
3998                 IWL_ERR(priv, "Unable to init EEPROM\n");
3999                 goto out_iounmap;
4000         }
4001         /* MAC Address location in EEPROM same for 3945/4965 */
4002         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4003         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4004         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4005         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4006
4007         /***********************
4008          * 5. Setup HW Constants
4009          * ********************/
4010         /* Device-specific setup */
4011         if (iwl3945_hw_set_hw_params(priv)) {
4012                 IWL_ERR(priv, "failed to set hw settings\n");
4013                 goto out_eeprom_free;
4014         }
4015
4016         /***********************
4017          * 6. Setup priv
4018          * ********************/
4019
4020         err = iwl3945_init_drv(priv);
4021         if (err) {
4022                 IWL_ERR(priv, "initializing driver failed\n");
4023                 goto out_unset_hw_params;
4024         }
4025
4026         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4027                 priv->cfg->name);
4028
4029         /***********************
4030          * 7. Setup Services
4031          * ********************/
4032
4033         spin_lock_irqsave(&priv->lock, flags);
4034         iwl_disable_interrupts(priv);
4035         spin_unlock_irqrestore(&priv->lock, flags);
4036
4037         pci_enable_msi(priv->pci_dev);
4038
4039         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4040                           IRQF_SHARED, DRV_NAME, priv);
4041         if (err) {
4042                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4043                 goto out_disable_msi;
4044         }
4045
4046         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4047         if (err) {
4048                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4049                 goto out_release_irq;
4050         }
4051
4052         iwl_set_rxon_channel(priv,
4053                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4054         iwl3945_setup_deferred_work(priv);
4055         iwl3945_setup_rx_handlers(priv);
4056         iwl_power_initialize(priv);
4057
4058         /*********************************
4059          * 8. Setup and Register mac80211
4060          * *******************************/
4061
4062         iwl_enable_interrupts(priv);
4063
4064         err = iwl3945_setup_mac(priv);
4065         if (err)
4066                 goto  out_remove_sysfs;
4067
4068         err = iwl_dbgfs_register(priv, DRV_NAME);
4069         if (err)
4070                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4071
4072         /* Start monitoring the killswitch */
4073         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4074                            2 * HZ);
4075
4076         return 0;
4077
4078  out_remove_sysfs:
4079         destroy_workqueue(priv->workqueue);
4080         priv->workqueue = NULL;
4081         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4082  out_release_irq:
4083         free_irq(priv->pci_dev->irq, priv);
4084  out_disable_msi:
4085         pci_disable_msi(priv->pci_dev);
4086         iwlcore_free_geos(priv);
4087         iwl_free_channel_map(priv);
4088  out_unset_hw_params:
4089         iwl3945_unset_hw_params(priv);
4090  out_eeprom_free:
4091         iwl_eeprom_free(priv);
4092  out_iounmap:
4093         pci_iounmap(pdev, priv->hw_base);
4094  out_pci_release_regions:
4095         pci_release_regions(pdev);
4096  out_pci_disable_device:
4097         pci_set_drvdata(pdev, NULL);
4098         pci_disable_device(pdev);
4099  out_ieee80211_free_hw:
4100         iwl_free_traffic_mem(priv);
4101         ieee80211_free_hw(priv->hw);
4102  out:
4103         return err;
4104 }
4105
4106 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4107 {
4108         struct iwl_priv *priv = pci_get_drvdata(pdev);
4109         unsigned long flags;
4110
4111         if (!priv)
4112                 return;
4113
4114         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4115
4116         iwl_dbgfs_unregister(priv);
4117
4118         set_bit(STATUS_EXIT_PENDING, &priv->status);
4119
4120         if (priv->mac80211_registered) {
4121                 ieee80211_unregister_hw(priv->hw);
4122                 priv->mac80211_registered = 0;
4123         } else {
4124                 iwl3945_down(priv);
4125         }
4126
4127         /* make sure we flush any pending irq or
4128          * tasklet for the driver
4129          */
4130         spin_lock_irqsave(&priv->lock, flags);
4131         iwl_disable_interrupts(priv);
4132         spin_unlock_irqrestore(&priv->lock, flags);
4133
4134         iwl_synchronize_irq(priv);
4135
4136         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4137
4138         cancel_delayed_work_sync(&priv->rfkill_poll);
4139
4140         iwl3945_dealloc_ucode_pci(priv);
4141
4142         if (priv->rxq.bd)
4143                 iwl3945_rx_queue_free(priv, &priv->rxq);
4144         iwl3945_hw_txq_ctx_free(priv);
4145
4146         iwl3945_unset_hw_params(priv);
4147         iwl_clear_stations_table(priv);
4148
4149         /*netif_stop_queue(dev); */
4150         flush_workqueue(priv->workqueue);
4151
4152         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4153          * priv->workqueue... so we can't take down the workqueue
4154          * until now... */
4155         destroy_workqueue(priv->workqueue);
4156         priv->workqueue = NULL;
4157         iwl_free_traffic_mem(priv);
4158
4159         free_irq(pdev->irq, priv);
4160         pci_disable_msi(pdev);
4161
4162         pci_iounmap(pdev, priv->hw_base);
4163         pci_release_regions(pdev);
4164         pci_disable_device(pdev);
4165         pci_set_drvdata(pdev, NULL);
4166
4167         iwl_free_channel_map(priv);
4168         iwlcore_free_geos(priv);
4169         kfree(priv->scan);
4170         if (priv->ibss_beacon)
4171                 dev_kfree_skb(priv->ibss_beacon);
4172
4173         ieee80211_free_hw(priv->hw);
4174 }
4175
4176
4177 /*****************************************************************************
4178  *
4179  * driver and module entry point
4180  *
4181  *****************************************************************************/
4182
4183 static struct pci_driver iwl3945_driver = {
4184         .name = DRV_NAME,
4185         .id_table = iwl3945_hw_card_ids,
4186         .probe = iwl3945_pci_probe,
4187         .remove = __devexit_p(iwl3945_pci_remove),
4188 #ifdef CONFIG_PM
4189         .suspend = iwl_pci_suspend,
4190         .resume = iwl_pci_resume,
4191 #endif
4192 };
4193
4194 static int __init iwl3945_init(void)
4195 {
4196
4197         int ret;
4198         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4199         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4200
4201         ret = iwl3945_rate_control_register();
4202         if (ret) {
4203                 printk(KERN_ERR DRV_NAME
4204                        "Unable to register rate control algorithm: %d\n", ret);
4205                 return ret;
4206         }
4207
4208         ret = pci_register_driver(&iwl3945_driver);
4209         if (ret) {
4210                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4211                 goto error_register;
4212         }
4213
4214         return ret;
4215
4216 error_register:
4217         iwl3945_rate_control_unregister();
4218         return ret;
4219 }
4220
4221 static void __exit iwl3945_exit(void)
4222 {
4223         pci_unregister_driver(&iwl3945_driver);
4224         iwl3945_rate_control_unregister();
4225 }
4226
4227 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4228
4229 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4230 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4231 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4232 MODULE_PARM_DESC(swcrypto,
4233                  "using software crypto (default 1 [software])\n");
4234 #ifdef CONFIG_IWLWIFI_DEBUG
4235 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4236 MODULE_PARM_DESC(debug, "debug output mask");
4237 #endif
4238 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4239                    int, S_IRUGO);
4240 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4241 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4242 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4243
4244 module_exit(iwl3945_exit);
4245 module_init(iwl3945_init);