iwl3945: streamline iwl3945_rfkill_poll()
[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         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
92         .sw_crypto = 1,
93         .restart_fw = 1,
94         /* the rest are 0 by default */
95 };
96
97 /**
98  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
99  * @priv: eeprom and antenna fields are used to determine antenna flags
100  *
101  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
102  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
103  *
104  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
105  * IWL_ANTENNA_MAIN      - Force MAIN antenna
106  * IWL_ANTENNA_AUX       - Force AUX antenna
107  */
108 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
109 {
110         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
111
112         switch (iwl3945_mod_params.antenna) {
113         case IWL_ANTENNA_DIVERSITY:
114                 return 0;
115
116         case IWL_ANTENNA_MAIN:
117                 if (eeprom->antenna_switch_type)
118                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
119                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
120
121         case IWL_ANTENNA_AUX:
122                 if (eeprom->antenna_switch_type)
123                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
124                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
125         }
126
127         /* bad antenna selector value */
128         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
129                 iwl3945_mod_params.antenna);
130
131         return 0;               /* "diversity" is default if error */
132 }
133
134 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
135                                    struct ieee80211_key_conf *keyconf,
136                                    u8 sta_id)
137 {
138         unsigned long flags;
139         __le16 key_flags = 0;
140         int ret;
141
142         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
143         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
144
145         if (sta_id == priv->hw_params.bcast_sta_id)
146                 key_flags |= STA_KEY_MULTICAST_MSK;
147
148         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
149         keyconf->hw_key_idx = keyconf->keyidx;
150         key_flags &= ~STA_KEY_FLG_INVALID;
151
152         spin_lock_irqsave(&priv->sta_lock, flags);
153         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
154         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
155         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
156                keyconf->keylen);
157
158         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
159                keyconf->keylen);
160
161         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
162                         == STA_KEY_FLG_NO_ENC)
163                 priv->stations[sta_id].sta.key.key_offset =
164                                  iwl_get_free_ucode_key_index(priv);
165         /* else, we are overriding an existing key => no need to allocated room
166         * in uCode. */
167
168         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
169                 "no space for a new key");
170
171         priv->stations[sta_id].sta.key.key_flags = key_flags;
172         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
173         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
174
175         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
176
177         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
178
179         spin_unlock_irqrestore(&priv->sta_lock, flags);
180
181         return ret;
182 }
183
184 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
185                                   struct ieee80211_key_conf *keyconf,
186                                   u8 sta_id)
187 {
188         return -EOPNOTSUPP;
189 }
190
191 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
192                                   struct ieee80211_key_conf *keyconf,
193                                   u8 sta_id)
194 {
195         return -EOPNOTSUPP;
196 }
197
198 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
199 {
200         unsigned long flags;
201
202         spin_lock_irqsave(&priv->sta_lock, flags);
203         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
204         memset(&priv->stations[sta_id].sta.key, 0,
205                 sizeof(struct iwl4965_keyinfo));
206         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
207         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
208         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
209         spin_unlock_irqrestore(&priv->sta_lock, flags);
210
211         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
212         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
213         return 0;
214 }
215
216 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
217                         struct ieee80211_key_conf *keyconf, u8 sta_id)
218 {
219         int ret = 0;
220
221         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
222
223         switch (keyconf->alg) {
224         case ALG_CCMP:
225                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
226                 break;
227         case ALG_TKIP:
228                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
229                 break;
230         case ALG_WEP:
231                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
232                 break;
233         default:
234                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
235                 ret = -EINVAL;
236         }
237
238         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
239                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
240                       sta_id, ret);
241
242         return ret;
243 }
244
245 static int iwl3945_remove_static_key(struct iwl_priv *priv)
246 {
247         int ret = -EOPNOTSUPP;
248
249         return ret;
250 }
251
252 static int iwl3945_set_static_key(struct iwl_priv *priv,
253                                 struct ieee80211_key_conf *key)
254 {
255         if (key->alg == ALG_WEP)
256                 return -EOPNOTSUPP;
257
258         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
259         return -EINVAL;
260 }
261
262 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
263 {
264         struct list_head *element;
265
266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
267                        priv->frames_count);
268
269         while (!list_empty(&priv->free_frames)) {
270                 element = priv->free_frames.next;
271                 list_del(element);
272                 kfree(list_entry(element, struct iwl3945_frame, list));
273                 priv->frames_count--;
274         }
275
276         if (priv->frames_count) {
277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
278                             priv->frames_count);
279                 priv->frames_count = 0;
280         }
281 }
282
283 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
284 {
285         struct iwl3945_frame *frame;
286         struct list_head *element;
287         if (list_empty(&priv->free_frames)) {
288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
289                 if (!frame) {
290                         IWL_ERR(priv, "Could not allocate frame!\n");
291                         return NULL;
292                 }
293
294                 priv->frames_count++;
295                 return frame;
296         }
297
298         element = priv->free_frames.next;
299         list_del(element);
300         return list_entry(element, struct iwl3945_frame, list);
301 }
302
303 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
304 {
305         memset(frame, 0, sizeof(*frame));
306         list_add(&frame->list, &priv->free_frames);
307 }
308
309 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
310                                 struct ieee80211_hdr *hdr,
311                                 int left)
312 {
313
314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
316              (priv->iw_mode != NL80211_IFTYPE_AP)))
317                 return 0;
318
319         if (priv->ibss_beacon->len > left)
320                 return 0;
321
322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
323
324         return priv->ibss_beacon->len;
325 }
326
327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
328 {
329         struct iwl3945_frame *frame;
330         unsigned int frame_size;
331         int rc;
332         u8 rate;
333
334         frame = iwl3945_get_free_frame(priv);
335
336         if (!frame) {
337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
338                           "command.\n");
339                 return -ENOMEM;
340         }
341
342         rate = iwl_rate_get_lowest_plcp(priv);
343
344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
345
346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
347                               &frame->u.cmd[0]);
348
349         iwl3945_free_frame(priv, frame);
350
351         return rc;
352 }
353
354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
355 {
356         if (priv->shared_virt)
357                 pci_free_consistent(priv->pci_dev,
358                                     sizeof(struct iwl3945_shared),
359                                     priv->shared_virt,
360                                     priv->shared_phys);
361 }
362
363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
364                                       struct ieee80211_tx_info *info,
365                                       struct iwl_device_cmd *cmd,
366                                       struct sk_buff *skb_frag,
367                                       int sta_id)
368 {
369         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
371
372         switch (keyinfo->alg) {
373         case ALG_CCMP:
374                 tx->sec_ctl = TX_CMD_SEC_CCM;
375                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
377                 break;
378
379         case ALG_TKIP:
380                 break;
381
382         case ALG_WEP:
383                 tx->sec_ctl = TX_CMD_SEC_WEP |
384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
385
386                 if (keyinfo->keylen == 13)
387                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
388
389                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
390
391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
392                              "with key %d\n", info->control.hw_key->hw_key_idx);
393                 break;
394
395         default:
396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
397                 break;
398         }
399 }
400
401 /*
402  * handle build REPLY_TX command notification.
403  */
404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
405                                   struct iwl_device_cmd *cmd,
406                                   struct ieee80211_tx_info *info,
407                                   struct ieee80211_hdr *hdr, u8 std_id)
408 {
409         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
410         __le32 tx_flags = tx->tx_flags;
411         __le16 fc = hdr->frame_control;
412         u8 rc_flags = info->control.rates[0].flags;
413
414         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
415         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
416                 tx_flags |= TX_CMD_FLG_ACK_MSK;
417                 if (ieee80211_is_mgmt(fc))
418                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
419                 if (ieee80211_is_probe_resp(fc) &&
420                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
421                         tx_flags |= TX_CMD_FLG_TSF_MSK;
422         } else {
423                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
424                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
425         }
426
427         tx->sta_id = std_id;
428         if (ieee80211_has_morefrags(fc))
429                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
430
431         if (ieee80211_is_data_qos(fc)) {
432                 u8 *qc = ieee80211_get_qos_ctl(hdr);
433                 tx->tid_tspec = qc[0] & 0xf;
434                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
435         } else {
436                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
437         }
438
439         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
440                 tx_flags |= TX_CMD_FLG_RTS_MSK;
441                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
442         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
443                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
444                 tx_flags |= TX_CMD_FLG_CTS_MSK;
445         }
446
447         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
448                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
449
450         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
451         if (ieee80211_is_mgmt(fc)) {
452                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
453                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
454                 else
455                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
456         } else {
457                 tx->timeout.pm_frame_timeout = 0;
458         }
459
460         tx->driver_txop = 0;
461         tx->tx_flags = tx_flags;
462         tx->next_frame_len = 0;
463 }
464
465 /*
466  * start REPLY_TX command process
467  */
468 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
469 {
470         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
471         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
472         struct iwl3945_tx_cmd *tx;
473         struct iwl_tx_queue *txq = NULL;
474         struct iwl_queue *q = NULL;
475         struct iwl_device_cmd *out_cmd;
476         struct iwl_cmd_meta *out_meta;
477         dma_addr_t phys_addr;
478         dma_addr_t txcmd_phys;
479         int txq_id = skb_get_queue_mapping(skb);
480         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
481         u8 id;
482         u8 unicast;
483         u8 sta_id;
484         u8 tid = 0;
485         u16 seq_number = 0;
486         __le16 fc;
487         u8 wait_write_ptr = 0;
488         u8 *qc = NULL;
489         unsigned long flags;
490         int rc;
491
492         spin_lock_irqsave(&priv->lock, flags);
493         if (iwl_is_rfkill(priv)) {
494                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
495                 goto drop_unlock;
496         }
497
498         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
499                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
500                 goto drop_unlock;
501         }
502
503         unicast = !is_multicast_ether_addr(hdr->addr1);
504         id = 0;
505
506         fc = hdr->frame_control;
507
508 #ifdef CONFIG_IWLWIFI_DEBUG
509         if (ieee80211_is_auth(fc))
510                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
511         else if (ieee80211_is_assoc_req(fc))
512                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
513         else if (ieee80211_is_reassoc_req(fc))
514                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
515 #endif
516
517         /* drop all non-injected data frame if we are not associated */
518         if (ieee80211_is_data(fc) &&
519             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
520             (!iwl_is_associated(priv) ||
521              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
522                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
523                 goto drop_unlock;
524         }
525
526         spin_unlock_irqrestore(&priv->lock, flags);
527
528         hdr_len = ieee80211_hdrlen(fc);
529
530         /* Find (or create) index into station table for destination station */
531         if (info->flags & IEEE80211_TX_CTL_INJECTED)
532                 sta_id = priv->hw_params.bcast_sta_id;
533         else
534                 sta_id = iwl_get_sta_id(priv, hdr);
535         if (sta_id == IWL_INVALID_STATION) {
536                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
537                                hdr->addr1);
538                 goto drop;
539         }
540
541         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
542
543         if (ieee80211_is_data_qos(fc)) {
544                 qc = ieee80211_get_qos_ctl(hdr);
545                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
546                 if (unlikely(tid >= MAX_TID_COUNT))
547                         goto drop;
548                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
549                                 IEEE80211_SCTL_SEQ;
550                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
551                         (hdr->seq_ctrl &
552                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
553                 seq_number += 0x10;
554         }
555
556         /* Descriptor for chosen Tx queue */
557         txq = &priv->txq[txq_id];
558         q = &txq->q;
559
560         spin_lock_irqsave(&priv->lock, flags);
561
562         idx = get_cmd_index(q, q->write_ptr, 0);
563
564         /* Set up driver data for this TFD */
565         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
566         txq->txb[q->write_ptr].skb[0] = skb;
567
568         /* Init first empty entry in queue's array of Tx/cmd buffers */
569         out_cmd = txq->cmd[idx];
570         out_meta = &txq->meta[idx];
571         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
572         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
573         memset(tx, 0, sizeof(*tx));
574
575         /*
576          * Set up the Tx-command (not MAC!) header.
577          * Store the chosen Tx queue and TFD index within the sequence field;
578          * after Tx, uCode's Tx response will return this value so driver can
579          * locate the frame within the tx queue and do post-tx processing.
580          */
581         out_cmd->hdr.cmd = REPLY_TX;
582         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
583                                 INDEX_TO_SEQ(q->write_ptr)));
584
585         /* Copy MAC header from skb into command buffer */
586         memcpy(tx->hdr, hdr, hdr_len);
587
588
589         if (info->control.hw_key)
590                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
591
592         /* TODO need this for burst mode later on */
593         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
594
595         /* set is_hcca to 0; it probably will never be implemented */
596         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
597
598         /* Total # bytes to be transmitted */
599         len = (u16)skb->len;
600         tx->len = cpu_to_le16(len);
601
602         iwl_dbg_log_tx_data_frame(priv, len, hdr);
603         iwl_update_stats(priv, true, fc, len);
604         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
605         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
606
607         if (!ieee80211_has_morefrags(hdr->frame_control)) {
608                 txq->need_update = 1;
609                 if (qc)
610                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
611         } else {
612                 wait_write_ptr = 1;
613                 txq->need_update = 0;
614         }
615
616         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
617                      le16_to_cpu(out_cmd->hdr.sequence));
618         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
619         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
620         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
621                            ieee80211_hdrlen(fc));
622
623         /*
624          * Use the first empty entry in this queue's command buffer array
625          * to contain the Tx command and MAC header concatenated together
626          * (payload data will be in another buffer).
627          * Size of this varies, due to varying MAC header length.
628          * If end is not dword aligned, we'll have 2 extra bytes at the end
629          * of the MAC header (device reads on dword boundaries).
630          * We'll tell device about this padding later.
631          */
632         len = sizeof(struct iwl3945_tx_cmd) +
633                         sizeof(struct iwl_cmd_header) + hdr_len;
634
635         len_org = len;
636         len = (len + 3) & ~3;
637
638         if (len_org != len)
639                 len_org = 1;
640         else
641                 len_org = 0;
642
643         /* Physical address of this Tx command's header (not MAC header!),
644          * within command buffer array. */
645         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
646                                     len, PCI_DMA_TODEVICE);
647         /* we do not map meta data ... so we can safely access address to
648          * provide to unmap command*/
649         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
650         pci_unmap_len_set(out_meta, len, len);
651
652         /* Add buffer containing Tx command and MAC(!) header to TFD's
653          * first entry */
654         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
655                                                    txcmd_phys, len, 1, 0);
656
657
658         /* Set up TFD's 2nd entry to point directly to remainder of skb,
659          * if any (802.11 null frames have no payload). */
660         len = skb->len - hdr_len;
661         if (len) {
662                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
663                                            len, PCI_DMA_TODEVICE);
664                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
665                                                            phys_addr, len,
666                                                            0, U32_PAD(len));
667         }
668
669
670         /* Tell device the write index *just past* this latest filled TFD */
671         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
672         rc = iwl_txq_update_write_ptr(priv, txq);
673         spin_unlock_irqrestore(&priv->lock, flags);
674
675         if (rc)
676                 return rc;
677
678         if ((iwl_queue_space(q) < q->high_mark)
679             && priv->mac80211_registered) {
680                 if (wait_write_ptr) {
681                         spin_lock_irqsave(&priv->lock, flags);
682                         txq->need_update = 1;
683                         iwl_txq_update_write_ptr(priv, txq);
684                         spin_unlock_irqrestore(&priv->lock, flags);
685                 }
686
687                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
688         }
689
690         return 0;
691
692 drop_unlock:
693         spin_unlock_irqrestore(&priv->lock, flags);
694 drop:
695         return -1;
696 }
697
698 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
699
700 #include "iwl-spectrum.h"
701
702 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
703 #define BEACON_TIME_MASK_HIGH   0xFF000000
704 #define TIME_UNIT               1024
705
706 /*
707  * extended beacon time format
708  * time in usec will be changed into a 32-bit value in 8:24 format
709  * the high 1 byte is the beacon counts
710  * the lower 3 bytes is the time in usec within one beacon interval
711  */
712
713 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
714 {
715         u32 quot;
716         u32 rem;
717         u32 interval = beacon_interval * 1024;
718
719         if (!interval || !usec)
720                 return 0;
721
722         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
723         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
724
725         return (quot << 24) + rem;
726 }
727
728 /* base is usually what we get from ucode with each received frame,
729  * the same as HW timer counter counting down
730  */
731
732 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
733 {
734         u32 base_low = base & BEACON_TIME_MASK_LOW;
735         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
736         u32 interval = beacon_interval * TIME_UNIT;
737         u32 res = (base & BEACON_TIME_MASK_HIGH) +
738             (addon & BEACON_TIME_MASK_HIGH);
739
740         if (base_low > addon_low)
741                 res += base_low - addon_low;
742         else if (base_low < addon_low) {
743                 res += interval + base_low - addon_low;
744                 res += (1 << 24);
745         } else
746                 res += (1 << 24);
747
748         return cpu_to_le32(res);
749 }
750
751 static int iwl3945_get_measurement(struct iwl_priv *priv,
752                                struct ieee80211_measurement_params *params,
753                                u8 type)
754 {
755         struct iwl_spectrum_cmd spectrum;
756         struct iwl_rx_packet *res;
757         struct iwl_host_cmd cmd = {
758                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
759                 .data = (void *)&spectrum,
760                 .flags = CMD_WANT_SKB,
761         };
762         u32 add_time = le64_to_cpu(params->start_time);
763         int rc;
764         int spectrum_resp_status;
765         int duration = le16_to_cpu(params->duration);
766
767         if (iwl_is_associated(priv))
768                 add_time =
769                     iwl3945_usecs_to_beacons(
770                         le64_to_cpu(params->start_time) - priv->last_tsf,
771                         le16_to_cpu(priv->rxon_timing.beacon_interval));
772
773         memset(&spectrum, 0, sizeof(spectrum));
774
775         spectrum.channel_count = cpu_to_le16(1);
776         spectrum.flags =
777             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
778         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
779         cmd.len = sizeof(spectrum);
780         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
781
782         if (iwl_is_associated(priv))
783                 spectrum.start_time =
784                     iwl3945_add_beacon_time(priv->last_beacon_time,
785                                 add_time,
786                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
787         else
788                 spectrum.start_time = 0;
789
790         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
791         spectrum.channels[0].channel = params->channel;
792         spectrum.channels[0].type = type;
793         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
794                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
795                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
796
797         rc = iwl_send_cmd_sync(priv, &cmd);
798         if (rc)
799                 return rc;
800
801         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
802         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
803                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
804                 rc = -EIO;
805         }
806
807         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
808         switch (spectrum_resp_status) {
809         case 0:         /* Command will be handled */
810                 if (res->u.spectrum.id != 0xff) {
811                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
812                                                 res->u.spectrum.id);
813                         priv->measurement_status &= ~MEASUREMENT_READY;
814                 }
815                 priv->measurement_status |= MEASUREMENT_ACTIVE;
816                 rc = 0;
817                 break;
818
819         case 1:         /* Command will not be handled */
820                 rc = -EAGAIN;
821                 break;
822         }
823
824         dev_kfree_skb_any(cmd.reply_skb);
825
826         return rc;
827 }
828 #endif
829
830 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
831                                struct iwl_rx_mem_buffer *rxb)
832 {
833         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
834         struct iwl_alive_resp *palive;
835         struct delayed_work *pwork;
836
837         palive = &pkt->u.alive_frame;
838
839         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
840                        "0x%01X 0x%01X\n",
841                        palive->is_valid, palive->ver_type,
842                        palive->ver_subtype);
843
844         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
845                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
846                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
847                        sizeof(struct iwl_alive_resp));
848                 pwork = &priv->init_alive_start;
849         } else {
850                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
851                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
852                        sizeof(struct iwl_alive_resp));
853                 pwork = &priv->alive_start;
854                 iwl3945_disable_events(priv);
855         }
856
857         /* We delay the ALIVE response by 5ms to
858          * give the HW RF Kill time to activate... */
859         if (palive->is_valid == UCODE_VALID_OK)
860                 queue_delayed_work(priv->workqueue, pwork,
861                                    msecs_to_jiffies(5));
862         else
863                 IWL_WARN(priv, "uCode did not respond OK.\n");
864 }
865
866 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
867                                  struct iwl_rx_mem_buffer *rxb)
868 {
869 #ifdef CONFIG_IWLWIFI_DEBUG
870         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
871 #endif
872
873         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
874         return;
875 }
876
877 static void iwl3945_bg_beacon_update(struct work_struct *work)
878 {
879         struct iwl_priv *priv =
880                 container_of(work, struct iwl_priv, beacon_update);
881         struct sk_buff *beacon;
882
883         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
884         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
885
886         if (!beacon) {
887                 IWL_ERR(priv, "update beacon failed\n");
888                 return;
889         }
890
891         mutex_lock(&priv->mutex);
892         /* new beacon skb is allocated every time; dispose previous.*/
893         if (priv->ibss_beacon)
894                 dev_kfree_skb(priv->ibss_beacon);
895
896         priv->ibss_beacon = beacon;
897         mutex_unlock(&priv->mutex);
898
899         iwl3945_send_beacon_cmd(priv);
900 }
901
902 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
903                                 struct iwl_rx_mem_buffer *rxb)
904 {
905 #ifdef CONFIG_IWLWIFI_DEBUG
906         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
907         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
908         u8 rate = beacon->beacon_notify_hdr.rate;
909
910         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
911                 "tsf %d %d rate %d\n",
912                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
913                 beacon->beacon_notify_hdr.failure_frame,
914                 le32_to_cpu(beacon->ibss_mgr_status),
915                 le32_to_cpu(beacon->high_tsf),
916                 le32_to_cpu(beacon->low_tsf), rate);
917 #endif
918
919         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
920             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
921                 queue_work(priv->workqueue, &priv->beacon_update);
922 }
923
924 /* Handle notification from uCode that card's power state is changing
925  * due to software, hardware, or critical temperature RFKILL */
926 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
927                                     struct iwl_rx_mem_buffer *rxb)
928 {
929         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
930         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
931         unsigned long status = priv->status;
932
933         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
934                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
935                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
936
937         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
938                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
939
940         if (flags & HW_CARD_DISABLED)
941                 set_bit(STATUS_RF_KILL_HW, &priv->status);
942         else
943                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
944
945
946         iwl_scan_cancel(priv);
947
948         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
949              test_bit(STATUS_RF_KILL_HW, &priv->status)))
950                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
951                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
952         else
953                 wake_up_interruptible(&priv->wait_command_queue);
954 }
955
956 /**
957  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
958  *
959  * Setup the RX handlers for each of the reply types sent from the uCode
960  * to the host.
961  *
962  * This function chains into the hardware specific files for them to setup
963  * any hardware specific handlers as well.
964  */
965 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
966 {
967         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
968         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
969         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
970         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
971         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
972         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
973             iwl_rx_pm_debug_statistics_notif;
974         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
975
976         /*
977          * The same handler is used for both the REPLY to a discrete
978          * statistics request from the host as well as for the periodic
979          * statistics notifications (after received beacons) from the uCode.
980          */
981         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
982         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
983
984         iwl_setup_spectrum_handlers(priv);
985         iwl_setup_rx_scan_handlers(priv);
986         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
987
988         /* Set up hardware specific Rx handlers */
989         iwl3945_hw_rx_handler_setup(priv);
990 }
991
992 /************************** RX-FUNCTIONS ****************************/
993 /*
994  * Rx theory of operation
995  *
996  * The host allocates 32 DMA target addresses and passes the host address
997  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
998  * 0 to 31
999  *
1000  * Rx Queue Indexes
1001  * The host/firmware share two index registers for managing the Rx buffers.
1002  *
1003  * The READ index maps to the first position that the firmware may be writing
1004  * to -- the driver can read up to (but not including) this position and get
1005  * good data.
1006  * The READ index is managed by the firmware once the card is enabled.
1007  *
1008  * The WRITE index maps to the last position the driver has read from -- the
1009  * position preceding WRITE is the last slot the firmware can place a packet.
1010  *
1011  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1012  * WRITE = READ.
1013  *
1014  * During initialization, the host sets up the READ queue position to the first
1015  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1016  *
1017  * When the firmware places a packet in a buffer, it will advance the READ index
1018  * and fire the RX interrupt.  The driver can then query the READ index and
1019  * process as many packets as possible, moving the WRITE index forward as it
1020  * resets the Rx queue buffers with new memory.
1021  *
1022  * The management in the driver is as follows:
1023  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1024  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1025  *   to replenish the iwl->rxq->rx_free.
1026  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1027  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1028  *   'processed' and 'read' driver indexes as well)
1029  * + A received packet is processed and handed to the kernel network stack,
1030  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1031  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1032  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1033  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1034  *   were enough free buffers and RX_STALLED is set it is cleared.
1035  *
1036  *
1037  * Driver sequence:
1038  *
1039  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1040  *                            iwl3945_rx_queue_restock
1041  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1042  *                            queue, updates firmware pointers, and updates
1043  *                            the WRITE index.  If insufficient rx_free buffers
1044  *                            are available, schedules iwl3945_rx_replenish
1045  *
1046  * -- enable interrupts --
1047  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1048  *                            READ INDEX, detaching the SKB from the pool.
1049  *                            Moves the packet buffer from queue to rx_used.
1050  *                            Calls iwl3945_rx_queue_restock to refill any empty
1051  *                            slots.
1052  * ...
1053  *
1054  */
1055
1056 /**
1057  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1058  */
1059 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1060                                           dma_addr_t dma_addr)
1061 {
1062         return cpu_to_le32((u32)dma_addr);
1063 }
1064
1065 /**
1066  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1067  *
1068  * If there are slots in the RX queue that need to be restocked,
1069  * and we have free pre-allocated buffers, fill the ranks as much
1070  * as we can, pulling from rx_free.
1071  *
1072  * This moves the 'write' index forward to catch up with 'processed', and
1073  * also updates the memory address in the firmware to reference the new
1074  * target buffer.
1075  */
1076 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1077 {
1078         struct iwl_rx_queue *rxq = &priv->rxq;
1079         struct list_head *element;
1080         struct iwl_rx_mem_buffer *rxb;
1081         unsigned long flags;
1082         int write, rc;
1083
1084         spin_lock_irqsave(&rxq->lock, flags);
1085         write = rxq->write & ~0x7;
1086         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1087                 /* Get next free Rx buffer, remove from free list */
1088                 element = rxq->rx_free.next;
1089                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1090                 list_del(element);
1091
1092                 /* Point to Rx buffer via next RBD in circular buffer */
1093                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1094                 rxq->queue[rxq->write] = rxb;
1095                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1096                 rxq->free_count--;
1097         }
1098         spin_unlock_irqrestore(&rxq->lock, flags);
1099         /* If the pre-allocated buffer pool is dropping low, schedule to
1100          * refill it */
1101         if (rxq->free_count <= RX_LOW_WATERMARK)
1102                 queue_work(priv->workqueue, &priv->rx_replenish);
1103
1104
1105         /* If we've added more space for the firmware to place data, tell it.
1106          * Increment device's write pointer in multiples of 8. */
1107         if ((rxq->write_actual != (rxq->write & ~0x7))
1108             || (abs(rxq->write - rxq->read) > 7)) {
1109                 spin_lock_irqsave(&rxq->lock, flags);
1110                 rxq->need_update = 1;
1111                 spin_unlock_irqrestore(&rxq->lock, flags);
1112                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1113                 if (rc)
1114                         return rc;
1115         }
1116
1117         return 0;
1118 }
1119
1120 /**
1121  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1122  *
1123  * When moving to rx_free an SKB is allocated for the slot.
1124  *
1125  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1126  * This is called as a scheduled work item (except for during initialization)
1127  */
1128 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1129 {
1130         struct iwl_rx_queue *rxq = &priv->rxq;
1131         struct list_head *element;
1132         struct iwl_rx_mem_buffer *rxb;
1133         struct sk_buff *skb;
1134         unsigned long flags;
1135
1136         while (1) {
1137                 spin_lock_irqsave(&rxq->lock, flags);
1138
1139                 if (list_empty(&rxq->rx_used)) {
1140                         spin_unlock_irqrestore(&rxq->lock, flags);
1141                         return;
1142                 }
1143                 spin_unlock_irqrestore(&rxq->lock, flags);
1144
1145                 if (rxq->free_count > RX_LOW_WATERMARK)
1146                         priority |= __GFP_NOWARN;
1147                 /* Alloc a new receive buffer */
1148                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1149                 if (!skb) {
1150                         if (net_ratelimit())
1151                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1152                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1153                             net_ratelimit())
1154                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1155                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1156                                          rxq->free_count);
1157                         /* We don't reschedule replenish work here -- we will
1158                          * call the restock method and if it still needs
1159                          * more buffers it will schedule replenish */
1160                         break;
1161                 }
1162
1163                 spin_lock_irqsave(&rxq->lock, flags);
1164                 if (list_empty(&rxq->rx_used)) {
1165                         spin_unlock_irqrestore(&rxq->lock, flags);
1166                         dev_kfree_skb_any(skb);
1167                         return;
1168                 }
1169                 element = rxq->rx_used.next;
1170                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1171                 list_del(element);
1172                 spin_unlock_irqrestore(&rxq->lock, flags);
1173
1174                 rxb->skb = skb;
1175
1176                 /* If radiotap head is required, reserve some headroom here.
1177                  * The physical head count is a variable rx_stats->phy_count.
1178                  * We reserve 4 bytes here. Plus these extra bytes, the
1179                  * headroom of the physical head should be enough for the
1180                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1181                  */
1182                 skb_reserve(rxb->skb, 4);
1183
1184                 /* Get physical address of RB/SKB */
1185                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1186                                                 rxb->skb->data,
1187                                                 priv->hw_params.rx_buf_size,
1188                                                 PCI_DMA_FROMDEVICE);
1189
1190                 spin_lock_irqsave(&rxq->lock, flags);
1191                 list_add_tail(&rxb->list, &rxq->rx_free);
1192                 priv->alloc_rxb_skb++;
1193                 rxq->free_count++;
1194                 spin_unlock_irqrestore(&rxq->lock, flags);
1195         }
1196 }
1197
1198 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1199 {
1200         unsigned long flags;
1201         int i;
1202         spin_lock_irqsave(&rxq->lock, flags);
1203         INIT_LIST_HEAD(&rxq->rx_free);
1204         INIT_LIST_HEAD(&rxq->rx_used);
1205         /* Fill the rx_used queue with _all_ of the Rx buffers */
1206         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1207                 /* In the reset function, these buffers may have been allocated
1208                  * to an SKB, so we need to unmap and free potential storage */
1209                 if (rxq->pool[i].skb != NULL) {
1210                         pci_unmap_single(priv->pci_dev,
1211                                          rxq->pool[i].real_dma_addr,
1212                                          priv->hw_params.rx_buf_size,
1213                                          PCI_DMA_FROMDEVICE);
1214                         priv->alloc_rxb_skb--;
1215                         dev_kfree_skb(rxq->pool[i].skb);
1216                         rxq->pool[i].skb = NULL;
1217                 }
1218                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1219         }
1220
1221         /* Set us so that we have processed and used all buffers, but have
1222          * not restocked the Rx queue with fresh buffers */
1223         rxq->read = rxq->write = 0;
1224         rxq->free_count = 0;
1225         rxq->write_actual = 0;
1226         spin_unlock_irqrestore(&rxq->lock, flags);
1227 }
1228
1229 void iwl3945_rx_replenish(void *data)
1230 {
1231         struct iwl_priv *priv = data;
1232         unsigned long flags;
1233
1234         iwl3945_rx_allocate(priv, GFP_KERNEL);
1235
1236         spin_lock_irqsave(&priv->lock, flags);
1237         iwl3945_rx_queue_restock(priv);
1238         spin_unlock_irqrestore(&priv->lock, flags);
1239 }
1240
1241 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1242 {
1243         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1244
1245         iwl3945_rx_queue_restock(priv);
1246 }
1247
1248
1249 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1250  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1251  * This free routine walks the list of POOL entries and if SKB is set to
1252  * non NULL it is unmapped and freed
1253  */
1254 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1255 {
1256         int i;
1257         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1258                 if (rxq->pool[i].skb != NULL) {
1259                         pci_unmap_single(priv->pci_dev,
1260                                          rxq->pool[i].real_dma_addr,
1261                                          priv->hw_params.rx_buf_size,
1262                                          PCI_DMA_FROMDEVICE);
1263                         dev_kfree_skb(rxq->pool[i].skb);
1264                 }
1265         }
1266
1267         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1268                             rxq->dma_addr);
1269         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1270                             rxq->rb_stts, rxq->rb_stts_dma);
1271         rxq->bd = NULL;
1272         rxq->rb_stts  = NULL;
1273 }
1274
1275
1276 /* Convert linear signal-to-noise ratio into dB */
1277 static u8 ratio2dB[100] = {
1278 /*       0   1   2   3   4   5   6   7   8   9 */
1279          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1280         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1281         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1282         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1283         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1284         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1285         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1286         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1287         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1288         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1289 };
1290
1291 /* Calculates a relative dB value from a ratio of linear
1292  *   (i.e. not dB) signal levels.
1293  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1294 int iwl3945_calc_db_from_ratio(int sig_ratio)
1295 {
1296         /* 1000:1 or higher just report as 60 dB */
1297         if (sig_ratio >= 1000)
1298                 return 60;
1299
1300         /* 100:1 or higher, divide by 10 and use table,
1301          *   add 20 dB to make up for divide by 10 */
1302         if (sig_ratio >= 100)
1303                 return 20 + (int)ratio2dB[sig_ratio/10];
1304
1305         /* We shouldn't see this */
1306         if (sig_ratio < 1)
1307                 return 0;
1308
1309         /* Use table for ratios 1:1 - 99:1 */
1310         return (int)ratio2dB[sig_ratio];
1311 }
1312
1313 #define PERFECT_RSSI (-20) /* dBm */
1314 #define WORST_RSSI (-95)   /* dBm */
1315 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1316
1317 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1318  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1319  *   about formulas used below. */
1320 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1321 {
1322         int sig_qual;
1323         int degradation = PERFECT_RSSI - rssi_dbm;
1324
1325         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1326          * as indicator; formula is (signal dbm - noise dbm).
1327          * SNR at or above 40 is a great signal (100%).
1328          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1329          * Weakest usable signal is usually 10 - 15 dB SNR. */
1330         if (noise_dbm) {
1331                 if (rssi_dbm - noise_dbm >= 40)
1332                         return 100;
1333                 else if (rssi_dbm < noise_dbm)
1334                         return 0;
1335                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1336
1337         /* Else use just the signal level.
1338          * This formula is a least squares fit of data points collected and
1339          *   compared with a reference system that had a percentage (%) display
1340          *   for signal quality. */
1341         } else
1342                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1343                             (15 * RSSI_RANGE + 62 * degradation)) /
1344                            (RSSI_RANGE * RSSI_RANGE);
1345
1346         if (sig_qual > 100)
1347                 sig_qual = 100;
1348         else if (sig_qual < 1)
1349                 sig_qual = 0;
1350
1351         return sig_qual;
1352 }
1353
1354 /**
1355  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1356  *
1357  * Uses the priv->rx_handlers callback function array to invoke
1358  * the appropriate handlers, including command responses,
1359  * frame-received notifications, and other notifications.
1360  */
1361 static void iwl3945_rx_handle(struct iwl_priv *priv)
1362 {
1363         struct iwl_rx_mem_buffer *rxb;
1364         struct iwl_rx_packet *pkt;
1365         struct iwl_rx_queue *rxq = &priv->rxq;
1366         u32 r, i;
1367         int reclaim;
1368         unsigned long flags;
1369         u8 fill_rx = 0;
1370         u32 count = 8;
1371         int total_empty = 0;
1372
1373         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1374          * buffer that the driver may process (last buffer filled by ucode). */
1375         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1376         i = rxq->read;
1377
1378         /* calculate total frames need to be restock after handling RX */
1379         total_empty = r - priv->rxq.write_actual;
1380         if (total_empty < 0)
1381                 total_empty += RX_QUEUE_SIZE;
1382
1383         if (total_empty > (RX_QUEUE_SIZE / 2))
1384                 fill_rx = 1;
1385         /* Rx interrupt, but nothing sent from uCode */
1386         if (i == r)
1387                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1388
1389         while (i != r) {
1390                 rxb = rxq->queue[i];
1391
1392                 /* If an RXB doesn't have a Rx queue slot associated with it,
1393                  * then a bug has been introduced in the queue refilling
1394                  * routines -- catch it here */
1395                 BUG_ON(rxb == NULL);
1396
1397                 rxq->queue[i] = NULL;
1398
1399                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1400                                 priv->hw_params.rx_buf_size,
1401                                 PCI_DMA_FROMDEVICE);
1402                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1403
1404                 trace_iwlwifi_dev_rx(priv, pkt,
1405                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1406
1407                 /* Reclaim a command buffer only if this packet is a response
1408                  *   to a (driver-originated) command.
1409                  * If the packet (e.g. Rx frame) originated from uCode,
1410                  *   there is no command buffer to reclaim.
1411                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1412                  *   but apparently a few don't get set; catch them here. */
1413                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1414                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1415                         (pkt->hdr.cmd != REPLY_TX);
1416
1417                 /* Based on type of command response or notification,
1418                  *   handle those that need handling via function in
1419                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1420                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1421                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1422                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1423                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1424                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1425                 } else {
1426                         /* No handling needed */
1427                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1428                                 r, i, get_cmd_string(pkt->hdr.cmd),
1429                                 pkt->hdr.cmd);
1430                 }
1431
1432                 if (reclaim) {
1433                         /* Invoke any callbacks, transfer the skb to caller, and
1434                          * fire off the (possibly) blocking iwl_send_cmd()
1435                          * as we reclaim the driver command queue */
1436                         if (rxb && rxb->skb)
1437                                 iwl_tx_cmd_complete(priv, rxb);
1438                         else
1439                                 IWL_WARN(priv, "Claim null rxb?\n");
1440                 }
1441
1442                 /* For now we just don't re-use anything.  We can tweak this
1443                  * later to try and re-use notification packets and SKBs that
1444                  * fail to Rx correctly */
1445                 if (rxb->skb != NULL) {
1446                         priv->alloc_rxb_skb--;
1447                         dev_kfree_skb_any(rxb->skb);
1448                         rxb->skb = NULL;
1449                 }
1450
1451                 spin_lock_irqsave(&rxq->lock, flags);
1452                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1453                 spin_unlock_irqrestore(&rxq->lock, flags);
1454                 i = (i + 1) & RX_QUEUE_MASK;
1455                 /* If there are a lot of unused frames,
1456                  * restock the Rx queue so ucode won't assert. */
1457                 if (fill_rx) {
1458                         count++;
1459                         if (count >= 8) {
1460                                 priv->rxq.read = i;
1461                                 iwl3945_rx_replenish_now(priv);
1462                                 count = 0;
1463                         }
1464                 }
1465         }
1466
1467         /* Backtrack one entry */
1468         priv->rxq.read = i;
1469         if (fill_rx)
1470                 iwl3945_rx_replenish_now(priv);
1471         else
1472                 iwl3945_rx_queue_restock(priv);
1473 }
1474
1475 /* call this function to flush any scheduled tasklet */
1476 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1477 {
1478         /* wait to make sure we flush pending tasklet*/
1479         synchronize_irq(priv->pci_dev->irq);
1480         tasklet_kill(&priv->irq_tasklet);
1481 }
1482
1483 #ifdef CONFIG_IWLWIFI_DEBUG
1484 static const char *desc_lookup(int i)
1485 {
1486         switch (i) {
1487         case 1:
1488                 return "FAIL";
1489         case 2:
1490                 return "BAD_PARAM";
1491         case 3:
1492                 return "BAD_CHECKSUM";
1493         case 4:
1494                 return "NMI_INTERRUPT";
1495         case 5:
1496                 return "SYSASSERT";
1497         case 6:
1498                 return "FATAL_ERROR";
1499         }
1500
1501         return "UNKNOWN";
1502 }
1503
1504 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1505 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1506
1507 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1508 {
1509         u32 i;
1510         u32 desc, time, count, base, data1;
1511         u32 blink1, blink2, ilink1, ilink2;
1512
1513         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1514
1515         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1516                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1517                 return;
1518         }
1519
1520
1521         count = iwl_read_targ_mem(priv, base);
1522
1523         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1524                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1525                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1526                         priv->status, count);
1527         }
1528
1529         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1530                   "ilink1  nmiPC   Line\n");
1531         for (i = ERROR_START_OFFSET;
1532              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1533              i += ERROR_ELEM_SIZE) {
1534                 desc = iwl_read_targ_mem(priv, base + i);
1535                 time =
1536                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1537                 blink1 =
1538                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1539                 blink2 =
1540                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1541                 ilink1 =
1542                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1543                 ilink2 =
1544                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1545                 data1 =
1546                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1547
1548                 IWL_ERR(priv,
1549                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1550                         desc_lookup(desc), desc, time, blink1, blink2,
1551                         ilink1, ilink2, data1);
1552                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1553                                         0, blink1, blink2, ilink1, ilink2);
1554         }
1555 }
1556
1557 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1558
1559 /**
1560  * iwl3945_print_event_log - Dump error event log to syslog
1561  *
1562  */
1563 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1564                                 u32 num_events, u32 mode)
1565 {
1566         u32 i;
1567         u32 base;       /* SRAM byte address of event log header */
1568         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1569         u32 ptr;        /* SRAM byte address of log data */
1570         u32 ev, time, data; /* event log data */
1571
1572         if (num_events == 0)
1573                 return;
1574
1575         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1576
1577         if (mode == 0)
1578                 event_size = 2 * sizeof(u32);
1579         else
1580                 event_size = 3 * sizeof(u32);
1581
1582         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1583
1584         /* "time" is actually "data" for mode 0 (no timestamp).
1585          * place event id # at far right for easier visual parsing. */
1586         for (i = 0; i < num_events; i++) {
1587                 ev = iwl_read_targ_mem(priv, ptr);
1588                 ptr += sizeof(u32);
1589                 time = iwl_read_targ_mem(priv, ptr);
1590                 ptr += sizeof(u32);
1591                 if (mode == 0) {
1592                         /* data, ev */
1593                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1594                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1595                 } else {
1596                         data = iwl_read_targ_mem(priv, ptr);
1597                         ptr += sizeof(u32);
1598                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1599                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1600                 }
1601         }
1602 }
1603
1604 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1605 {
1606         u32 base;       /* SRAM byte address of event log header */
1607         u32 capacity;   /* event log capacity in # entries */
1608         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1609         u32 num_wraps;  /* # times uCode wrapped to top of log */
1610         u32 next_entry; /* index of next entry to be written by uCode */
1611         u32 size;       /* # entries that we'll print */
1612
1613         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1614         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1615                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1616                 return;
1617         }
1618
1619         /* event log header */
1620         capacity = iwl_read_targ_mem(priv, base);
1621         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1622         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1623         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1624
1625         size = num_wraps ? capacity : next_entry;
1626
1627         /* bail out if nothing in log */
1628         if (size == 0) {
1629                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1630                 return;
1631         }
1632
1633         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1634                   size, num_wraps);
1635
1636         /* if uCode has wrapped back to top of log, start at the oldest entry,
1637          * i.e the next one that uCode would fill. */
1638         if (num_wraps)
1639                 iwl3945_print_event_log(priv, next_entry,
1640                                     capacity - next_entry, mode);
1641
1642         /* (then/else) start at top of log */
1643         iwl3945_print_event_log(priv, 0, next_entry, mode);
1644
1645 }
1646 #else
1647 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1648 {
1649 }
1650
1651 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1652 {
1653 }
1654
1655 #endif
1656
1657 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1658 {
1659         u32 inta, handled = 0;
1660         u32 inta_fh;
1661         unsigned long flags;
1662 #ifdef CONFIG_IWLWIFI_DEBUG
1663         u32 inta_mask;
1664 #endif
1665
1666         spin_lock_irqsave(&priv->lock, flags);
1667
1668         /* Ack/clear/reset pending uCode interrupts.
1669          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1670          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1671         inta = iwl_read32(priv, CSR_INT);
1672         iwl_write32(priv, CSR_INT, inta);
1673
1674         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1675          * Any new interrupts that happen after this, either while we're
1676          * in this tasklet, or later, will show up in next ISR/tasklet. */
1677         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1678         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1679
1680 #ifdef CONFIG_IWLWIFI_DEBUG
1681         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1682                 /* just for debug */
1683                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1684                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1685                               inta, inta_mask, inta_fh);
1686         }
1687 #endif
1688
1689         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1690          * atomic, make sure that inta covers all the interrupts that
1691          * we've discovered, even if FH interrupt came in just after
1692          * reading CSR_INT. */
1693         if (inta_fh & CSR39_FH_INT_RX_MASK)
1694                 inta |= CSR_INT_BIT_FH_RX;
1695         if (inta_fh & CSR39_FH_INT_TX_MASK)
1696                 inta |= CSR_INT_BIT_FH_TX;
1697
1698         /* Now service all interrupt bits discovered above. */
1699         if (inta & CSR_INT_BIT_HW_ERR) {
1700                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1701
1702                 /* Tell the device to stop sending interrupts */
1703                 iwl_disable_interrupts(priv);
1704
1705                 priv->isr_stats.hw++;
1706                 iwl_irq_handle_error(priv);
1707
1708                 handled |= CSR_INT_BIT_HW_ERR;
1709
1710                 spin_unlock_irqrestore(&priv->lock, flags);
1711
1712                 return;
1713         }
1714
1715 #ifdef CONFIG_IWLWIFI_DEBUG
1716         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1717                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1718                 if (inta & CSR_INT_BIT_SCD) {
1719                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1720                                       "the frame/frames.\n");
1721                         priv->isr_stats.sch++;
1722                 }
1723
1724                 /* Alive notification via Rx interrupt will do the real work */
1725                 if (inta & CSR_INT_BIT_ALIVE) {
1726                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1727                         priv->isr_stats.alive++;
1728                 }
1729         }
1730 #endif
1731         /* Safely ignore these bits for debug checks below */
1732         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1733
1734         /* Error detected by uCode */
1735         if (inta & CSR_INT_BIT_SW_ERR) {
1736                 IWL_ERR(priv, "Microcode SW error detected. "
1737                         "Restarting 0x%X.\n", inta);
1738                 priv->isr_stats.sw++;
1739                 priv->isr_stats.sw_err = inta;
1740                 iwl_irq_handle_error(priv);
1741                 handled |= CSR_INT_BIT_SW_ERR;
1742         }
1743
1744         /* uCode wakes up after power-down sleep */
1745         if (inta & CSR_INT_BIT_WAKEUP) {
1746                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1747                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1748                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1749                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1750                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1753                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1754
1755                 priv->isr_stats.wakeup++;
1756                 handled |= CSR_INT_BIT_WAKEUP;
1757         }
1758
1759         /* All uCode command responses, including Tx command responses,
1760          * Rx "responses" (frame-received notification), and other
1761          * notifications from uCode come through here*/
1762         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1763                 iwl3945_rx_handle(priv);
1764                 priv->isr_stats.rx++;
1765                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1766         }
1767
1768         if (inta & CSR_INT_BIT_FH_TX) {
1769                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1770                 priv->isr_stats.tx++;
1771
1772                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1773                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1774                                         (FH39_SRVC_CHNL), 0x0);
1775                 handled |= CSR_INT_BIT_FH_TX;
1776         }
1777
1778         if (inta & ~handled) {
1779                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1780                 priv->isr_stats.unhandled++;
1781         }
1782
1783         if (inta & ~priv->inta_mask) {
1784                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1785                          inta & ~priv->inta_mask);
1786                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1787         }
1788
1789         /* Re-enable all interrupts */
1790         /* only Re-enable if disabled by irq */
1791         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1792                 iwl_enable_interrupts(priv);
1793
1794 #ifdef CONFIG_IWLWIFI_DEBUG
1795         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1796                 inta = iwl_read32(priv, CSR_INT);
1797                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1798                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1799                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1800                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1801         }
1802 #endif
1803         spin_unlock_irqrestore(&priv->lock, flags);
1804 }
1805
1806 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1807                                          enum ieee80211_band band,
1808                                      u8 is_active, u8 n_probes,
1809                                      struct iwl3945_scan_channel *scan_ch)
1810 {
1811         struct ieee80211_channel *chan;
1812         const struct ieee80211_supported_band *sband;
1813         const struct iwl_channel_info *ch_info;
1814         u16 passive_dwell = 0;
1815         u16 active_dwell = 0;
1816         int added, i;
1817
1818         sband = iwl_get_hw_mode(priv, band);
1819         if (!sband)
1820                 return 0;
1821
1822         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1823         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1824
1825         if (passive_dwell <= active_dwell)
1826                 passive_dwell = active_dwell + 1;
1827
1828         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1829                 chan = priv->scan_request->channels[i];
1830
1831                 if (chan->band != band)
1832                         continue;
1833
1834                 scan_ch->channel = chan->hw_value;
1835
1836                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1837                 if (!is_channel_valid(ch_info)) {
1838                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1839                                        scan_ch->channel);
1840                         continue;
1841                 }
1842
1843                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1844                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1845                 /* If passive , set up for auto-switch
1846                  *  and use long active_dwell time.
1847                  */
1848                 if (!is_active || is_channel_passive(ch_info) ||
1849                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1850                         scan_ch->type = 0;      /* passive */
1851                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1852                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1853                 } else {
1854                         scan_ch->type = 1;      /* active */
1855                 }
1856
1857                 /* Set direct probe bits. These may be used both for active
1858                  * scan channels (probes gets sent right away),
1859                  * or for passive channels (probes get se sent only after
1860                  * hearing clear Rx packet).*/
1861                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1862                         if (n_probes)
1863                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1864                 } else {
1865                         /* uCode v1 does not allow setting direct probe bits on
1866                          * passive channel. */
1867                         if ((scan_ch->type & 1) && n_probes)
1868                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1869                 }
1870
1871                 /* Set txpower levels to defaults */
1872                 scan_ch->tpc.dsp_atten = 110;
1873                 /* scan_pwr_info->tpc.dsp_atten; */
1874
1875                 /*scan_pwr_info->tpc.tx_gain; */
1876                 if (band == IEEE80211_BAND_5GHZ)
1877                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1878                 else {
1879                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1880                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1881                          * power level:
1882                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1883                          */
1884                 }
1885
1886                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1887                                scan_ch->channel,
1888                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1889                                (scan_ch->type & 1) ?
1890                                active_dwell : passive_dwell);
1891
1892                 scan_ch++;
1893                 added++;
1894         }
1895
1896         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1897         return added;
1898 }
1899
1900 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1901                               struct ieee80211_rate *rates)
1902 {
1903         int i;
1904
1905         for (i = 0; i < IWL_RATE_COUNT; i++) {
1906                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1907                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1908                 rates[i].hw_value_short = i;
1909                 rates[i].flags = 0;
1910                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1911                         /*
1912                          * If CCK != 1M then set short preamble rate flag.
1913                          */
1914                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1915                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1916                 }
1917         }
1918 }
1919
1920 /******************************************************************************
1921  *
1922  * uCode download functions
1923  *
1924  ******************************************************************************/
1925
1926 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1927 {
1928         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1929         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1930         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1932         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1933         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1934 }
1935
1936 /**
1937  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1938  *     looking at all data.
1939  */
1940 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1941 {
1942         u32 val;
1943         u32 save_len = len;
1944         int rc = 0;
1945         u32 errcnt;
1946
1947         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1948
1949         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1950                                IWL39_RTC_INST_LOWER_BOUND);
1951
1952         errcnt = 0;
1953         for (; len > 0; len -= sizeof(u32), image++) {
1954                 /* read data comes through single port, auto-incr addr */
1955                 /* NOTE: Use the debugless read so we don't flood kernel log
1956                  * if IWL_DL_IO is set */
1957                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1958                 if (val != le32_to_cpu(*image)) {
1959                         IWL_ERR(priv, "uCode INST section is invalid at "
1960                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1961                                   save_len - len, val, le32_to_cpu(*image));
1962                         rc = -EIO;
1963                         errcnt++;
1964                         if (errcnt >= 20)
1965                                 break;
1966                 }
1967         }
1968
1969
1970         if (!errcnt)
1971                 IWL_DEBUG_INFO(priv,
1972                         "ucode image in INSTRUCTION memory is good\n");
1973
1974         return rc;
1975 }
1976
1977
1978 /**
1979  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1980  *   using sample data 100 bytes apart.  If these sample points are good,
1981  *   it's a pretty good bet that everything between them is good, too.
1982  */
1983 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1984 {
1985         u32 val;
1986         int rc = 0;
1987         u32 errcnt = 0;
1988         u32 i;
1989
1990         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1991
1992         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1993                 /* read data comes through single port, auto-incr addr */
1994                 /* NOTE: Use the debugless read so we don't flood kernel log
1995                  * if IWL_DL_IO is set */
1996                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1997                         i + IWL39_RTC_INST_LOWER_BOUND);
1998                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1999                 if (val != le32_to_cpu(*image)) {
2000 #if 0 /* Enable this if you want to see details */
2001                         IWL_ERR(priv, "uCode INST section is invalid at "
2002                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2003                                   i, val, *image);
2004 #endif
2005                         rc = -EIO;
2006                         errcnt++;
2007                         if (errcnt >= 3)
2008                                 break;
2009                 }
2010         }
2011
2012         return rc;
2013 }
2014
2015
2016 /**
2017  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2018  *    and verify its contents
2019  */
2020 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2021 {
2022         __le32 *image;
2023         u32 len;
2024         int rc = 0;
2025
2026         /* Try bootstrap */
2027         image = (__le32 *)priv->ucode_boot.v_addr;
2028         len = priv->ucode_boot.len;
2029         rc = iwl3945_verify_inst_sparse(priv, image, len);
2030         if (rc == 0) {
2031                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2032                 return 0;
2033         }
2034
2035         /* Try initialize */
2036         image = (__le32 *)priv->ucode_init.v_addr;
2037         len = priv->ucode_init.len;
2038         rc = iwl3945_verify_inst_sparse(priv, image, len);
2039         if (rc == 0) {
2040                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2041                 return 0;
2042         }
2043
2044         /* Try runtime/protocol */
2045         image = (__le32 *)priv->ucode_code.v_addr;
2046         len = priv->ucode_code.len;
2047         rc = iwl3945_verify_inst_sparse(priv, image, len);
2048         if (rc == 0) {
2049                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2050                 return 0;
2051         }
2052
2053         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2054
2055         /* Since nothing seems to match, show first several data entries in
2056          * instruction SRAM, so maybe visual inspection will give a clue.
2057          * Selection of bootstrap image (vs. other images) is arbitrary. */
2058         image = (__le32 *)priv->ucode_boot.v_addr;
2059         len = priv->ucode_boot.len;
2060         rc = iwl3945_verify_inst_full(priv, image, len);
2061
2062         return rc;
2063 }
2064
2065 static void iwl3945_nic_start(struct iwl_priv *priv)
2066 {
2067         /* Remove all resets to allow NIC to operate */
2068         iwl_write32(priv, CSR_RESET, 0);
2069 }
2070
2071 /**
2072  * iwl3945_read_ucode - Read uCode images from disk file.
2073  *
2074  * Copy into buffers for card to fetch via bus-mastering
2075  */
2076 static int iwl3945_read_ucode(struct iwl_priv *priv)
2077 {
2078         const struct iwl_ucode_header *ucode;
2079         int ret = -EINVAL, index;
2080         const struct firmware *ucode_raw;
2081         /* firmware file name contains uCode/driver compatibility version */
2082         const char *name_pre = priv->cfg->fw_name_pre;
2083         const unsigned int api_max = priv->cfg->ucode_api_max;
2084         const unsigned int api_min = priv->cfg->ucode_api_min;
2085         char buf[25];
2086         u8 *src;
2087         size_t len;
2088         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2089
2090         /* Ask kernel firmware_class module to get the boot firmware off disk.
2091          * request_firmware() is synchronous, file is in memory on return. */
2092         for (index = api_max; index >= api_min; index--) {
2093                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2094                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2095                 if (ret < 0) {
2096                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2097                                   buf, ret);
2098                         if (ret == -ENOENT)
2099                                 continue;
2100                         else
2101                                 goto error;
2102                 } else {
2103                         if (index < api_max)
2104                                 IWL_ERR(priv, "Loaded firmware %s, "
2105                                         "which is deprecated. "
2106                                         " Please use API v%u instead.\n",
2107                                           buf, api_max);
2108                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2109                                        "(%zd bytes) from disk\n",
2110                                        buf, ucode_raw->size);
2111                         break;
2112                 }
2113         }
2114
2115         if (ret < 0)
2116                 goto error;
2117
2118         /* Make sure that we got at least our header! */
2119         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2120                 IWL_ERR(priv, "File size way too small!\n");
2121                 ret = -EINVAL;
2122                 goto err_release;
2123         }
2124
2125         /* Data from ucode file:  header followed by uCode images */
2126         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2127
2128         priv->ucode_ver = le32_to_cpu(ucode->ver);
2129         api_ver = IWL_UCODE_API(priv->ucode_ver);
2130         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2131         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2132         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2133         init_data_size =
2134                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2135         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2136         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2137
2138         /* api_ver should match the api version forming part of the
2139          * firmware filename ... but we don't check for that and only rely
2140          * on the API version read from firmware header from here on forward */
2141
2142         if (api_ver < api_min || api_ver > api_max) {
2143                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2144                           "Driver supports v%u, firmware is v%u.\n",
2145                           api_max, api_ver);
2146                 priv->ucode_ver = 0;
2147                 ret = -EINVAL;
2148                 goto err_release;
2149         }
2150         if (api_ver != api_max)
2151                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2152                           "got %u. New firmware can be obtained "
2153                           "from http://www.intellinuxwireless.org.\n",
2154                           api_max, api_ver);
2155
2156         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2157                 IWL_UCODE_MAJOR(priv->ucode_ver),
2158                 IWL_UCODE_MINOR(priv->ucode_ver),
2159                 IWL_UCODE_API(priv->ucode_ver),
2160                 IWL_UCODE_SERIAL(priv->ucode_ver));
2161
2162         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2163                        priv->ucode_ver);
2164         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2165                        inst_size);
2166         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2167                        data_size);
2168         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2169                        init_size);
2170         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2171                        init_data_size);
2172         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2173                        boot_size);
2174
2175
2176         /* Verify size of file vs. image size info in file's header */
2177         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2178                 inst_size + data_size + init_size +
2179                 init_data_size + boot_size) {
2180
2181                 IWL_DEBUG_INFO(priv,
2182                         "uCode file size %zd does not match expected size\n",
2183                         ucode_raw->size);
2184                 ret = -EINVAL;
2185                 goto err_release;
2186         }
2187
2188         /* Verify that uCode images will fit in card's SRAM */
2189         if (inst_size > IWL39_MAX_INST_SIZE) {
2190                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2191                                inst_size);
2192                 ret = -EINVAL;
2193                 goto err_release;
2194         }
2195
2196         if (data_size > IWL39_MAX_DATA_SIZE) {
2197                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2198                                data_size);
2199                 ret = -EINVAL;
2200                 goto err_release;
2201         }
2202         if (init_size > IWL39_MAX_INST_SIZE) {
2203                 IWL_DEBUG_INFO(priv,
2204                                 "uCode init instr len %d too large to fit in\n",
2205                                 init_size);
2206                 ret = -EINVAL;
2207                 goto err_release;
2208         }
2209         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2210                 IWL_DEBUG_INFO(priv,
2211                                 "uCode init data len %d too large to fit in\n",
2212                                 init_data_size);
2213                 ret = -EINVAL;
2214                 goto err_release;
2215         }
2216         if (boot_size > IWL39_MAX_BSM_SIZE) {
2217                 IWL_DEBUG_INFO(priv,
2218                                 "uCode boot instr len %d too large to fit in\n",
2219                                 boot_size);
2220                 ret = -EINVAL;
2221                 goto err_release;
2222         }
2223
2224         /* Allocate ucode buffers for card's bus-master loading ... */
2225
2226         /* Runtime instructions and 2 copies of data:
2227          * 1) unmodified from disk
2228          * 2) backup cache for save/restore during power-downs */
2229         priv->ucode_code.len = inst_size;
2230         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2231
2232         priv->ucode_data.len = data_size;
2233         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2234
2235         priv->ucode_data_backup.len = data_size;
2236         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2237
2238         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2239             !priv->ucode_data_backup.v_addr)
2240                 goto err_pci_alloc;
2241
2242         /* Initialization instructions and data */
2243         if (init_size && init_data_size) {
2244                 priv->ucode_init.len = init_size;
2245                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2246
2247                 priv->ucode_init_data.len = init_data_size;
2248                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2249
2250                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2251                         goto err_pci_alloc;
2252         }
2253
2254         /* Bootstrap (instructions only, no data) */
2255         if (boot_size) {
2256                 priv->ucode_boot.len = boot_size;
2257                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2258
2259                 if (!priv->ucode_boot.v_addr)
2260                         goto err_pci_alloc;
2261         }
2262
2263         /* Copy images into buffers for card's bus-master reads ... */
2264
2265         /* Runtime instructions (first block of data in file) */
2266         len = inst_size;
2267         IWL_DEBUG_INFO(priv,
2268                 "Copying (but not loading) uCode instr len %zd\n", len);
2269         memcpy(priv->ucode_code.v_addr, src, len);
2270         src += len;
2271
2272         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2273                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2274
2275         /* Runtime data (2nd block)
2276          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2277         len = data_size;
2278         IWL_DEBUG_INFO(priv,
2279                 "Copying (but not loading) uCode data len %zd\n", len);
2280         memcpy(priv->ucode_data.v_addr, src, len);
2281         memcpy(priv->ucode_data_backup.v_addr, src, len);
2282         src += len;
2283
2284         /* Initialization instructions (3rd block) */
2285         if (init_size) {
2286                 len = init_size;
2287                 IWL_DEBUG_INFO(priv,
2288                         "Copying (but not loading) init instr len %zd\n", len);
2289                 memcpy(priv->ucode_init.v_addr, src, len);
2290                 src += len;
2291         }
2292
2293         /* Initialization data (4th block) */
2294         if (init_data_size) {
2295                 len = init_data_size;
2296                 IWL_DEBUG_INFO(priv,
2297                         "Copying (but not loading) init data len %zd\n", len);
2298                 memcpy(priv->ucode_init_data.v_addr, src, len);
2299                 src += len;
2300         }
2301
2302         /* Bootstrap instructions (5th block) */
2303         len = boot_size;
2304         IWL_DEBUG_INFO(priv,
2305                 "Copying (but not loading) boot instr len %zd\n", len);
2306         memcpy(priv->ucode_boot.v_addr, src, len);
2307
2308         /* We have our copies now, allow OS release its copies */
2309         release_firmware(ucode_raw);
2310         return 0;
2311
2312  err_pci_alloc:
2313         IWL_ERR(priv, "failed to allocate pci memory\n");
2314         ret = -ENOMEM;
2315         iwl3945_dealloc_ucode_pci(priv);
2316
2317  err_release:
2318         release_firmware(ucode_raw);
2319
2320  error:
2321         return ret;
2322 }
2323
2324
2325 /**
2326  * iwl3945_set_ucode_ptrs - Set uCode address location
2327  *
2328  * Tell initialization uCode where to find runtime uCode.
2329  *
2330  * BSM registers initially contain pointers to initialization uCode.
2331  * We need to replace them to load runtime uCode inst and data,
2332  * and to save runtime data when powering down.
2333  */
2334 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2335 {
2336         dma_addr_t pinst;
2337         dma_addr_t pdata;
2338
2339         /* bits 31:0 for 3945 */
2340         pinst = priv->ucode_code.p_addr;
2341         pdata = priv->ucode_data_backup.p_addr;
2342
2343         /* Tell bootstrap uCode where to find image to load */
2344         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2345         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2346         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2347                                  priv->ucode_data.len);
2348
2349         /* Inst byte count must be last to set up, bit 31 signals uCode
2350          *   that all new ptr/size info is in place */
2351         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2352                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2353
2354         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2355
2356         return 0;
2357 }
2358
2359 /**
2360  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2361  *
2362  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2363  *
2364  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2365  */
2366 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2367 {
2368         /* Check alive response for "valid" sign from uCode */
2369         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2370                 /* We had an error bringing up the hardware, so take it
2371                  * all the way back down so we can try again */
2372                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2373                 goto restart;
2374         }
2375
2376         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2377          * This is a paranoid check, because we would not have gotten the
2378          * "initialize" alive if code weren't properly loaded.  */
2379         if (iwl3945_verify_ucode(priv)) {
2380                 /* Runtime instruction load was bad;
2381                  * take it all the way back down so we can try again */
2382                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2383                 goto restart;
2384         }
2385
2386         /* Send pointers to protocol/runtime uCode image ... init code will
2387          * load and launch runtime uCode, which will send us another "Alive"
2388          * notification. */
2389         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2390         if (iwl3945_set_ucode_ptrs(priv)) {
2391                 /* Runtime instruction load won't happen;
2392                  * take it all the way back down so we can try again */
2393                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2394                 goto restart;
2395         }
2396         return;
2397
2398  restart:
2399         queue_work(priv->workqueue, &priv->restart);
2400 }
2401
2402 /**
2403  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2404  *                   from protocol/runtime uCode (initialization uCode's
2405  *                   Alive gets handled by iwl3945_init_alive_start()).
2406  */
2407 static void iwl3945_alive_start(struct iwl_priv *priv)
2408 {
2409         int thermal_spin = 0;
2410         u32 rfkill;
2411
2412         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2413
2414         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2415                 /* We had an error bringing up the hardware, so take it
2416                  * all the way back down so we can try again */
2417                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2418                 goto restart;
2419         }
2420
2421         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2422          * This is a paranoid check, because we would not have gotten the
2423          * "runtime" alive if code weren't properly loaded.  */
2424         if (iwl3945_verify_ucode(priv)) {
2425                 /* Runtime instruction load was bad;
2426                  * take it all the way back down so we can try again */
2427                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2428                 goto restart;
2429         }
2430
2431         iwl_clear_stations_table(priv);
2432
2433         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2434         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2435
2436         if (rfkill & 0x1) {
2437                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2438                 /* if RFKILL is not on, then wait for thermal
2439                  * sensor in adapter to kick in */
2440                 while (iwl3945_hw_get_temperature(priv) == 0) {
2441                         thermal_spin++;
2442                         udelay(10);
2443                 }
2444
2445                 if (thermal_spin)
2446                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2447                                        thermal_spin * 10);
2448         } else
2449                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2450
2451         /* After the ALIVE response, we can send commands to 3945 uCode */
2452         set_bit(STATUS_ALIVE, &priv->status);
2453
2454         if (iwl_is_rfkill(priv))
2455                 return;
2456
2457         ieee80211_wake_queues(priv->hw);
2458
2459         priv->active_rate = priv->rates_mask;
2460         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2461
2462         iwl_power_update_mode(priv, false);
2463
2464         if (iwl_is_associated(priv)) {
2465                 struct iwl3945_rxon_cmd *active_rxon =
2466                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2467
2468                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2469                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2470         } else {
2471                 /* Initialize our rx_config data */
2472                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2473         }
2474
2475         /* Configure Bluetooth device coexistence support */
2476         iwl_send_bt_config(priv);
2477
2478         /* Configure the adapter for unassociated operation */
2479         iwlcore_commit_rxon(priv);
2480
2481         iwl3945_reg_txpower_periodic(priv);
2482
2483         iwl_leds_init(priv);
2484
2485         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2486         set_bit(STATUS_READY, &priv->status);
2487         wake_up_interruptible(&priv->wait_command_queue);
2488
2489         /* reassociate for ADHOC mode */
2490         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2491                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2492                                                                 priv->vif);
2493                 if (beacon)
2494                         iwl_mac_beacon_update(priv->hw, beacon);
2495         }
2496
2497         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2498                 iwl_set_mode(priv, priv->iw_mode);
2499
2500         return;
2501
2502  restart:
2503         queue_work(priv->workqueue, &priv->restart);
2504 }
2505
2506 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2507
2508 static void __iwl3945_down(struct iwl_priv *priv)
2509 {
2510         unsigned long flags;
2511         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2512         struct ieee80211_conf *conf = NULL;
2513
2514         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2515
2516         conf = ieee80211_get_hw_conf(priv->hw);
2517
2518         if (!exit_pending)
2519                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2520
2521         iwl_clear_stations_table(priv);
2522
2523         /* Unblock any waiting calls */
2524         wake_up_interruptible_all(&priv->wait_command_queue);
2525
2526         /* Wipe out the EXIT_PENDING status bit if we are not actually
2527          * exiting the module */
2528         if (!exit_pending)
2529                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2530
2531         /* stop and reset the on-board processor */
2532         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2533
2534         /* tell the device to stop sending interrupts */
2535         spin_lock_irqsave(&priv->lock, flags);
2536         iwl_disable_interrupts(priv);
2537         spin_unlock_irqrestore(&priv->lock, flags);
2538         iwl_synchronize_irq(priv);
2539
2540         if (priv->mac80211_registered)
2541                 ieee80211_stop_queues(priv->hw);
2542
2543         /* If we have not previously called iwl3945_init() then
2544          * clear all bits but the RF Kill bits and return */
2545         if (!iwl_is_init(priv)) {
2546                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2547                                         STATUS_RF_KILL_HW |
2548                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2549                                         STATUS_GEO_CONFIGURED |
2550                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2551                                         STATUS_EXIT_PENDING;
2552                 goto exit;
2553         }
2554
2555         /* ...otherwise clear out all the status bits but the RF Kill
2556          * bit and continue taking the NIC down. */
2557         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2558                                 STATUS_RF_KILL_HW |
2559                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2560                                 STATUS_GEO_CONFIGURED |
2561                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2562                                 STATUS_FW_ERROR |
2563                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2564                                 STATUS_EXIT_PENDING;
2565
2566         iwl3945_hw_txq_ctx_stop(priv);
2567         iwl3945_hw_rxq_stop(priv);
2568
2569         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2570                                 APMG_CLK_VAL_DMA_CLK_RQT);
2571
2572         udelay(5);
2573
2574         /* Stop the device, and put it in low power state */
2575         priv->cfg->ops->lib->apm_ops.stop(priv);
2576
2577  exit:
2578         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2579
2580         if (priv->ibss_beacon)
2581                 dev_kfree_skb(priv->ibss_beacon);
2582         priv->ibss_beacon = NULL;
2583
2584         /* clear out any free frames */
2585         iwl3945_clear_free_frames(priv);
2586 }
2587
2588 static void iwl3945_down(struct iwl_priv *priv)
2589 {
2590         mutex_lock(&priv->mutex);
2591         __iwl3945_down(priv);
2592         mutex_unlock(&priv->mutex);
2593
2594         iwl3945_cancel_deferred_work(priv);
2595 }
2596
2597 #define MAX_HW_RESTARTS 5
2598
2599 static int __iwl3945_up(struct iwl_priv *priv)
2600 {
2601         int rc, i;
2602
2603         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2604                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2605                 return -EIO;
2606         }
2607
2608         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2609                 IWL_ERR(priv, "ucode not available for device bring up\n");
2610                 return -EIO;
2611         }
2612
2613         /* If platform's RF_KILL switch is NOT set to KILL */
2614         if (iwl_read32(priv, CSR_GP_CNTRL) &
2615                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2616                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2617         else {
2618                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2619                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2620                 return -ENODEV;
2621         }
2622
2623         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2624
2625         rc = iwl3945_hw_nic_init(priv);
2626         if (rc) {
2627                 IWL_ERR(priv, "Unable to int nic\n");
2628                 return rc;
2629         }
2630
2631         /* make sure rfkill handshake bits are cleared */
2632         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2633         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2634                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2635
2636         /* clear (again), then enable host interrupts */
2637         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2638         iwl_enable_interrupts(priv);
2639
2640         /* really make sure rfkill handshake bits are cleared */
2641         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2642         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2643
2644         /* Copy original ucode data image from disk into backup cache.
2645          * This will be used to initialize the on-board processor's
2646          * data SRAM for a clean start when the runtime program first loads. */
2647         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2648                priv->ucode_data.len);
2649
2650         /* We return success when we resume from suspend and rf_kill is on. */
2651         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2652                 return 0;
2653
2654         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2655
2656                 iwl_clear_stations_table(priv);
2657
2658                 /* load bootstrap state machine,
2659                  * load bootstrap program into processor's memory,
2660                  * prepare to load the "initialize" uCode */
2661                 priv->cfg->ops->lib->load_ucode(priv);
2662
2663                 if (rc) {
2664                         IWL_ERR(priv,
2665                                 "Unable to set up bootstrap uCode: %d\n", rc);
2666                         continue;
2667                 }
2668
2669                 /* start card; "initialize" will load runtime ucode */
2670                 iwl3945_nic_start(priv);
2671
2672                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2673
2674                 return 0;
2675         }
2676
2677         set_bit(STATUS_EXIT_PENDING, &priv->status);
2678         __iwl3945_down(priv);
2679         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2680
2681         /* tried to restart and config the device for as long as our
2682          * patience could withstand */
2683         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2684         return -EIO;
2685 }
2686
2687
2688 /*****************************************************************************
2689  *
2690  * Workqueue callbacks
2691  *
2692  *****************************************************************************/
2693
2694 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2695 {
2696         struct iwl_priv *priv =
2697             container_of(data, struct iwl_priv, init_alive_start.work);
2698
2699         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2700                 return;
2701
2702         mutex_lock(&priv->mutex);
2703         iwl3945_init_alive_start(priv);
2704         mutex_unlock(&priv->mutex);
2705 }
2706
2707 static void iwl3945_bg_alive_start(struct work_struct *data)
2708 {
2709         struct iwl_priv *priv =
2710             container_of(data, struct iwl_priv, alive_start.work);
2711
2712         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2713                 return;
2714
2715         mutex_lock(&priv->mutex);
2716         iwl3945_alive_start(priv);
2717         mutex_unlock(&priv->mutex);
2718 }
2719
2720 /*
2721  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2722  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2723  * *is* readable even when device has been SW_RESET into low power mode
2724  * (e.g. during RF KILL).
2725  */
2726 static void iwl3945_rfkill_poll(struct work_struct *data)
2727 {
2728         struct iwl_priv *priv =
2729             container_of(data, struct iwl_priv, rfkill_poll.work);
2730         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2731         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2732                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2733
2734         if (new_rfkill != old_rfkill) {
2735                 if (new_rfkill)
2736                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2737                 else
2738                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2739
2740                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2741
2742                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2743                                 new_rfkill ? "disable radio" : "enable radio");
2744         }
2745
2746         /* Keep this running, even if radio now enabled.  This will be
2747          * cancelled in mac_start() if system decides to start again */
2748         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2749                            round_jiffies_relative(2 * HZ));
2750
2751 }
2752
2753 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2754 static void iwl3945_bg_request_scan(struct work_struct *data)
2755 {
2756         struct iwl_priv *priv =
2757             container_of(data, struct iwl_priv, request_scan);
2758         struct iwl_host_cmd cmd = {
2759                 .id = REPLY_SCAN_CMD,
2760                 .len = sizeof(struct iwl3945_scan_cmd),
2761                 .flags = CMD_SIZE_HUGE,
2762         };
2763         int rc = 0;
2764         struct iwl3945_scan_cmd *scan;
2765         struct ieee80211_conf *conf = NULL;
2766         u8 n_probes = 0;
2767         enum ieee80211_band band;
2768         bool is_active = false;
2769
2770         conf = ieee80211_get_hw_conf(priv->hw);
2771
2772         mutex_lock(&priv->mutex);
2773
2774         cancel_delayed_work(&priv->scan_check);
2775
2776         if (!iwl_is_ready(priv)) {
2777                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2778                 goto done;
2779         }
2780
2781         /* Make sure the scan wasn't canceled before this queued work
2782          * was given the chance to run... */
2783         if (!test_bit(STATUS_SCANNING, &priv->status))
2784                 goto done;
2785
2786         /* This should never be called or scheduled if there is currently
2787          * a scan active in the hardware. */
2788         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2789                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2790                                 "Ignoring second request.\n");
2791                 rc = -EIO;
2792                 goto done;
2793         }
2794
2795         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2796                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2797                 goto done;
2798         }
2799
2800         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2801                 IWL_DEBUG_HC(priv,
2802                         "Scan request while abort pending. Queuing.\n");
2803                 goto done;
2804         }
2805
2806         if (iwl_is_rfkill(priv)) {
2807                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2808                 goto done;
2809         }
2810
2811         if (!test_bit(STATUS_READY, &priv->status)) {
2812                 IWL_DEBUG_HC(priv,
2813                         "Scan request while uninitialized. Queuing.\n");
2814                 goto done;
2815         }
2816
2817         if (!priv->scan_bands) {
2818                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2819                 goto done;
2820         }
2821
2822         if (!priv->scan) {
2823                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2824                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2825                 if (!priv->scan) {
2826                         rc = -ENOMEM;
2827                         goto done;
2828                 }
2829         }
2830         scan = priv->scan;
2831         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2832
2833         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2834         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2835
2836         if (iwl_is_associated(priv)) {
2837                 u16 interval = 0;
2838                 u32 extra;
2839                 u32 suspend_time = 100;
2840                 u32 scan_suspend_time = 100;
2841                 unsigned long flags;
2842
2843                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2844
2845                 spin_lock_irqsave(&priv->lock, flags);
2846                 interval = priv->beacon_int;
2847                 spin_unlock_irqrestore(&priv->lock, flags);
2848
2849                 scan->suspend_time = 0;
2850                 scan->max_out_time = cpu_to_le32(200 * 1024);
2851                 if (!interval)
2852                         interval = suspend_time;
2853                 /*
2854                  * suspend time format:
2855                  *  0-19: beacon interval in usec (time before exec.)
2856                  * 20-23: 0
2857                  * 24-31: number of beacons (suspend between channels)
2858                  */
2859
2860                 extra = (suspend_time / interval) << 24;
2861                 scan_suspend_time = 0xFF0FFFFF &
2862                     (extra | ((suspend_time % interval) * 1024));
2863
2864                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2865                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2866                                scan_suspend_time, interval);
2867         }
2868
2869         if (priv->scan_request->n_ssids) {
2870                 int i, p = 0;
2871                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2872                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2873                         /* always does wildcard anyway */
2874                         if (!priv->scan_request->ssids[i].ssid_len)
2875                                 continue;
2876                         scan->direct_scan[p].id = WLAN_EID_SSID;
2877                         scan->direct_scan[p].len =
2878                                 priv->scan_request->ssids[i].ssid_len;
2879                         memcpy(scan->direct_scan[p].ssid,
2880                                priv->scan_request->ssids[i].ssid,
2881                                priv->scan_request->ssids[i].ssid_len);
2882                         n_probes++;
2883                         p++;
2884                 }
2885                 is_active = true;
2886         } else
2887                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2888
2889         /* We don't build a direct scan probe request; the uCode will do
2890          * that based on the direct_mask added to each channel entry */
2891         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2892         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2893         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2894
2895         /* flags + rate selection */
2896
2897         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2898                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2899                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2900                 scan->good_CRC_th = 0;
2901                 band = IEEE80211_BAND_2GHZ;
2902         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2903                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2904                 /*
2905                  * If active scaning is requested but a certain channel
2906                  * is marked passive, we can do active scanning if we
2907                  * detect transmissions.
2908                  */
2909                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2910                 band = IEEE80211_BAND_5GHZ;
2911         } else {
2912                 IWL_WARN(priv, "Invalid scan band count\n");
2913                 goto done;
2914         }
2915
2916         scan->tx_cmd.len = cpu_to_le16(
2917                         iwl_fill_probe_req(priv,
2918                                 (struct ieee80211_mgmt *)scan->data,
2919                                 priv->scan_request->ie,
2920                                 priv->scan_request->ie_len,
2921                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2922
2923         /* select Rx antennas */
2924         scan->flags |= iwl3945_get_antenna_flags(priv);
2925
2926         if (iwl_is_monitor_mode(priv))
2927                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2928
2929         scan->channel_count =
2930                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2931                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2932
2933         if (scan->channel_count == 0) {
2934                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2935                 goto done;
2936         }
2937
2938         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2939             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2940         cmd.data = scan;
2941         scan->len = cpu_to_le16(cmd.len);
2942
2943         set_bit(STATUS_SCAN_HW, &priv->status);
2944         rc = iwl_send_cmd_sync(priv, &cmd);
2945         if (rc)
2946                 goto done;
2947
2948         queue_delayed_work(priv->workqueue, &priv->scan_check,
2949                            IWL_SCAN_CHECK_WATCHDOG);
2950
2951         mutex_unlock(&priv->mutex);
2952         return;
2953
2954  done:
2955         /* can not perform scan make sure we clear scanning
2956          * bits from status so next scan request can be performed.
2957          * if we dont clear scanning status bit here all next scan
2958          * will fail
2959         */
2960         clear_bit(STATUS_SCAN_HW, &priv->status);
2961         clear_bit(STATUS_SCANNING, &priv->status);
2962
2963         /* inform mac80211 scan aborted */
2964         queue_work(priv->workqueue, &priv->scan_completed);
2965         mutex_unlock(&priv->mutex);
2966 }
2967
2968 static void iwl3945_bg_up(struct work_struct *data)
2969 {
2970         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2971
2972         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2973                 return;
2974
2975         mutex_lock(&priv->mutex);
2976         __iwl3945_up(priv);
2977         mutex_unlock(&priv->mutex);
2978 }
2979
2980 static void iwl3945_bg_restart(struct work_struct *data)
2981 {
2982         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2983
2984         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2985                 return;
2986
2987         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2988                 mutex_lock(&priv->mutex);
2989                 priv->vif = NULL;
2990                 priv->is_open = 0;
2991                 mutex_unlock(&priv->mutex);
2992                 iwl3945_down(priv);
2993                 ieee80211_restart_hw(priv->hw);
2994         } else {
2995                 iwl3945_down(priv);
2996                 queue_work(priv->workqueue, &priv->up);
2997         }
2998 }
2999
3000 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3001 {
3002         struct iwl_priv *priv =
3003             container_of(data, struct iwl_priv, rx_replenish);
3004
3005         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3006                 return;
3007
3008         mutex_lock(&priv->mutex);
3009         iwl3945_rx_replenish(priv);
3010         mutex_unlock(&priv->mutex);
3011 }
3012
3013 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3014
3015 void iwl3945_post_associate(struct iwl_priv *priv)
3016 {
3017         int rc = 0;
3018         struct ieee80211_conf *conf = NULL;
3019
3020         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3021                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3022                 return;
3023         }
3024
3025
3026         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3027                         priv->assoc_id, priv->active_rxon.bssid_addr);
3028
3029         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3030                 return;
3031
3032         if (!priv->vif || !priv->is_open)
3033                 return;
3034
3035         iwl_scan_cancel_timeout(priv, 200);
3036
3037         conf = ieee80211_get_hw_conf(priv->hw);
3038
3039         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3040         iwlcore_commit_rxon(priv);
3041
3042         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3043         iwl_setup_rxon_timing(priv);
3044         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3045                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3046         if (rc)
3047                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3048                             "Attempting to continue.\n");
3049
3050         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3051
3052         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3053
3054         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3055                         priv->assoc_id, priv->beacon_int);
3056
3057         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3058                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3059         else
3060                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3061
3062         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3063                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3064                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3065                 else
3066                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3067
3068                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3069                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3070
3071         }
3072
3073         iwlcore_commit_rxon(priv);
3074
3075         switch (priv->iw_mode) {
3076         case NL80211_IFTYPE_STATION:
3077                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3078                 break;
3079
3080         case NL80211_IFTYPE_ADHOC: