]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c
iwlwifi: fix potential rx buffer loss
[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/lib80211.h>
45 #include <net/mac80211.h>
46
47 #include <asm/div64.h>
48
49 #define DRV_NAME        "iwl3945"
50
51 #include "iwl-fh.h"
52 #include "iwl-3945-fh.h"
53 #include "iwl-commands.h"
54 #include "iwl-sta.h"
55 #include "iwl-3945.h"
56 #include "iwl-helpers.h"
57 #include "iwl-core.h"
58 #include "iwl-dev.h"
59
60 /*
61  * module name, copyright, version, etc.
62  */
63
64 #define DRV_DESCRIPTION \
65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
66
67 #ifdef CONFIG_IWLWIFI_DEBUG
68 #define VD "d"
69 #else
70 #define VD
71 #endif
72
73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
74 #define VS "s"
75 #else
76 #define VS
77 #endif
78
79 #define IWL39_VERSION "1.2.26k" VD VS
80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
82 #define DRV_VERSION     IWL39_VERSION
83
84
85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
86 MODULE_VERSION(DRV_VERSION);
87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
88 MODULE_LICENSE("GPL");
89
90  /* module parameters */
91 struct iwl_mod_params iwl3945_mod_params = {
92         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
93         .sw_crypto = 1,
94         .restart_fw = 1,
95         /* the rest are 0 by default */
96 };
97
98 /**
99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
100  * @priv: eeprom and antenna fields are used to determine antenna flags
101  *
102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
104  *
105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
107  * IWL_ANTENNA_AUX       - Force AUX antenna
108  */
109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
110 {
111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
112
113         switch (iwl3945_mod_params.antenna) {
114         case IWL_ANTENNA_DIVERSITY:
115                 return 0;
116
117         case IWL_ANTENNA_MAIN:
118                 if (eeprom->antenna_switch_type)
119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
121
122         case IWL_ANTENNA_AUX:
123                 if (eeprom->antenna_switch_type)
124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
126         }
127
128         /* bad antenna selector value */
129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
130                 iwl3945_mod_params.antenna);
131
132         return 0;               /* "diversity" is default if error */
133 }
134
135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
136                                    struct ieee80211_key_conf *keyconf,
137                                    u8 sta_id)
138 {
139         unsigned long flags;
140         __le16 key_flags = 0;
141         int ret;
142
143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
145
146         if (sta_id == priv->hw_params.bcast_sta_id)
147                 key_flags |= STA_KEY_MULTICAST_MSK;
148
149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
150         keyconf->hw_key_idx = keyconf->keyidx;
151         key_flags &= ~STA_KEY_FLG_INVALID;
152
153         spin_lock_irqsave(&priv->sta_lock, flags);
154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
157                keyconf->keylen);
158
159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
160                keyconf->keylen);
161
162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
163                         == STA_KEY_FLG_NO_ENC)
164                 priv->stations[sta_id].sta.key.key_offset =
165                                  iwl_get_free_ucode_key_index(priv);
166         /* else, we are overriding an existing key => no need to allocated room
167         * in uCode. */
168
169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
170                 "no space for a new key");
171
172         priv->stations[sta_id].sta.key.key_flags = key_flags;
173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
175
176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
177
178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
179
180         spin_unlock_irqrestore(&priv->sta_lock, flags);
181
182         return ret;
183 }
184
185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
186                                   struct ieee80211_key_conf *keyconf,
187                                   u8 sta_id)
188 {
189         return -EOPNOTSUPP;
190 }
191
192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
193                                   struct ieee80211_key_conf *keyconf,
194                                   u8 sta_id)
195 {
196         return -EOPNOTSUPP;
197 }
198
199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
200 {
201         unsigned long flags;
202
203         spin_lock_irqsave(&priv->sta_lock, flags);
204         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
205         memset(&priv->stations[sta_id].sta.key, 0,
206                 sizeof(struct iwl4965_keyinfo));
207         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
208         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
209         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
210         spin_unlock_irqrestore(&priv->sta_lock, flags);
211
212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
213         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
214         return 0;
215 }
216
217 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
218                         struct ieee80211_key_conf *keyconf, u8 sta_id)
219 {
220         int ret = 0;
221
222         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
223
224         switch (keyconf->alg) {
225         case ALG_CCMP:
226                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
227                 break;
228         case ALG_TKIP:
229                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
230                 break;
231         case ALG_WEP:
232                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
233                 break;
234         default:
235                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
236                 ret = -EINVAL;
237         }
238
239         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
240                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
241                       sta_id, ret);
242
243         return ret;
244 }
245
246 static int iwl3945_remove_static_key(struct iwl_priv *priv)
247 {
248         int ret = -EOPNOTSUPP;
249
250         return ret;
251 }
252
253 static int iwl3945_set_static_key(struct iwl_priv *priv,
254                                 struct ieee80211_key_conf *key)
255 {
256         if (key->alg == ALG_WEP)
257                 return -EOPNOTSUPP;
258
259         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
260         return -EINVAL;
261 }
262
263 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
264 {
265         struct list_head *element;
266
267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
268                        priv->frames_count);
269
270         while (!list_empty(&priv->free_frames)) {
271                 element = priv->free_frames.next;
272                 list_del(element);
273                 kfree(list_entry(element, struct iwl3945_frame, list));
274                 priv->frames_count--;
275         }
276
277         if (priv->frames_count) {
278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
279                             priv->frames_count);
280                 priv->frames_count = 0;
281         }
282 }
283
284 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
285 {
286         struct iwl3945_frame *frame;
287         struct list_head *element;
288         if (list_empty(&priv->free_frames)) {
289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
290                 if (!frame) {
291                         IWL_ERR(priv, "Could not allocate frame!\n");
292                         return NULL;
293                 }
294
295                 priv->frames_count++;
296                 return frame;
297         }
298
299         element = priv->free_frames.next;
300         list_del(element);
301         return list_entry(element, struct iwl3945_frame, list);
302 }
303
304 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
305 {
306         memset(frame, 0, sizeof(*frame));
307         list_add(&frame->list, &priv->free_frames);
308 }
309
310 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
311                                 struct ieee80211_hdr *hdr,
312                                 int left)
313 {
314
315         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
316             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
317              (priv->iw_mode != NL80211_IFTYPE_AP)))
318                 return 0;
319
320         if (priv->ibss_beacon->len > left)
321                 return 0;
322
323         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
324
325         return priv->ibss_beacon->len;
326 }
327
328 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
329 {
330         struct iwl3945_frame *frame;
331         unsigned int frame_size;
332         int rc;
333         u8 rate;
334
335         frame = iwl3945_get_free_frame(priv);
336
337         if (!frame) {
338                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
339                           "command.\n");
340                 return -ENOMEM;
341         }
342
343         rate = iwl_rate_get_lowest_plcp(priv);
344
345         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
346
347         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
348                               &frame->u.cmd[0]);
349
350         iwl3945_free_frame(priv, frame);
351
352         return rc;
353 }
354
355 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
356 {
357         if (priv->shared_virt)
358                 pci_free_consistent(priv->pci_dev,
359                                     sizeof(struct iwl3945_shared),
360                                     priv->shared_virt,
361                                     priv->shared_phys);
362 }
363
364 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
365                                       struct ieee80211_tx_info *info,
366                                       struct iwl_device_cmd *cmd,
367                                       struct sk_buff *skb_frag,
368                                       int sta_id)
369 {
370         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
371         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
372
373         switch (keyinfo->alg) {
374         case ALG_CCMP:
375                 tx->sec_ctl = TX_CMD_SEC_CCM;
376                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
377                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
378                 break;
379
380         case ALG_TKIP:
381                 break;
382
383         case ALG_WEP:
384                 tx->sec_ctl = TX_CMD_SEC_WEP |
385                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
386
387                 if (keyinfo->keylen == 13)
388                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
389
390                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
391
392                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
393                              "with key %d\n", info->control.hw_key->hw_key_idx);
394                 break;
395
396         default:
397                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
398                 break;
399         }
400 }
401
402 /*
403  * handle build REPLY_TX command notification.
404  */
405 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
406                                   struct iwl_device_cmd *cmd,
407                                   struct ieee80211_tx_info *info,
408                                   struct ieee80211_hdr *hdr, u8 std_id)
409 {
410         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
411         __le32 tx_flags = tx->tx_flags;
412         __le16 fc = hdr->frame_control;
413         u8 rc_flags = info->control.rates[0].flags;
414
415         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
416         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
417                 tx_flags |= TX_CMD_FLG_ACK_MSK;
418                 if (ieee80211_is_mgmt(fc))
419                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
420                 if (ieee80211_is_probe_resp(fc) &&
421                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
422                         tx_flags |= TX_CMD_FLG_TSF_MSK;
423         } else {
424                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
425                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
426         }
427
428         tx->sta_id = std_id;
429         if (ieee80211_has_morefrags(fc))
430                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
431
432         if (ieee80211_is_data_qos(fc)) {
433                 u8 *qc = ieee80211_get_qos_ctl(hdr);
434                 tx->tid_tspec = qc[0] & 0xf;
435                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
436         } else {
437                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
438         }
439
440         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
441                 tx_flags |= TX_CMD_FLG_RTS_MSK;
442                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
443         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
444                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
445                 tx_flags |= TX_CMD_FLG_CTS_MSK;
446         }
447
448         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
449                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
450
451         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
452         if (ieee80211_is_mgmt(fc)) {
453                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
454                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
455                 else
456                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
457         } else {
458                 tx->timeout.pm_frame_timeout = 0;
459 #ifdef CONFIG_IWLWIFI_LEDS
460                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
461 #endif
462         }
463
464         tx->driver_txop = 0;
465         tx->tx_flags = tx_flags;
466         tx->next_frame_len = 0;
467 }
468
469 /*
470  * start REPLY_TX command process
471  */
472 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
473 {
474         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
475         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
476         struct iwl3945_tx_cmd *tx;
477         struct iwl_tx_queue *txq = NULL;
478         struct iwl_queue *q = NULL;
479         struct iwl_device_cmd *out_cmd;
480         struct iwl_cmd_meta *out_meta;
481         dma_addr_t phys_addr;
482         dma_addr_t txcmd_phys;
483         int txq_id = skb_get_queue_mapping(skb);
484         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
485         u8 id;
486         u8 unicast;
487         u8 sta_id;
488         u8 tid = 0;
489         u16 seq_number = 0;
490         __le16 fc;
491         u8 wait_write_ptr = 0;
492         u8 *qc = NULL;
493         unsigned long flags;
494         int rc;
495
496         spin_lock_irqsave(&priv->lock, flags);
497         if (iwl_is_rfkill(priv)) {
498                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
499                 goto drop_unlock;
500         }
501
502         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
503                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
504                 goto drop_unlock;
505         }
506
507         unicast = !is_multicast_ether_addr(hdr->addr1);
508         id = 0;
509
510         fc = hdr->frame_control;
511
512 #ifdef CONFIG_IWLWIFI_DEBUG
513         if (ieee80211_is_auth(fc))
514                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
515         else if (ieee80211_is_assoc_req(fc))
516                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
517         else if (ieee80211_is_reassoc_req(fc))
518                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
519 #endif
520
521         /* drop all non-injected data frame if we are not associated */
522         if (ieee80211_is_data(fc) &&
523             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
524             (!iwl_is_associated(priv) ||
525              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
526                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
527                 goto drop_unlock;
528         }
529
530         spin_unlock_irqrestore(&priv->lock, flags);
531
532         hdr_len = ieee80211_hdrlen(fc);
533
534         /* Find (or create) index into station table for destination station */
535         if (info->flags & IEEE80211_TX_CTL_INJECTED)
536                 sta_id = priv->hw_params.bcast_sta_id;
537         else
538                 sta_id = iwl_get_sta_id(priv, hdr);
539         if (sta_id == IWL_INVALID_STATION) {
540                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
541                                hdr->addr1);
542                 goto drop;
543         }
544
545         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
546
547         if (ieee80211_is_data_qos(fc)) {
548                 qc = ieee80211_get_qos_ctl(hdr);
549                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
550                 if (unlikely(tid >= MAX_TID_COUNT))
551                         goto drop;
552                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
553                                 IEEE80211_SCTL_SEQ;
554                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
555                         (hdr->seq_ctrl &
556                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
557                 seq_number += 0x10;
558         }
559
560         /* Descriptor for chosen Tx queue */
561         txq = &priv->txq[txq_id];
562         q = &txq->q;
563
564         spin_lock_irqsave(&priv->lock, flags);
565
566         idx = get_cmd_index(q, q->write_ptr, 0);
567
568         /* Set up driver data for this TFD */
569         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
570         txq->txb[q->write_ptr].skb[0] = skb;
571
572         /* Init first empty entry in queue's array of Tx/cmd buffers */
573         out_cmd = txq->cmd[idx];
574         out_meta = &txq->meta[idx];
575         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
576         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
577         memset(tx, 0, sizeof(*tx));
578
579         /*
580          * Set up the Tx-command (not MAC!) header.
581          * Store the chosen Tx queue and TFD index within the sequence field;
582          * after Tx, uCode's Tx response will return this value so driver can
583          * locate the frame within the tx queue and do post-tx processing.
584          */
585         out_cmd->hdr.cmd = REPLY_TX;
586         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
587                                 INDEX_TO_SEQ(q->write_ptr)));
588
589         /* Copy MAC header from skb into command buffer */
590         memcpy(tx->hdr, hdr, hdr_len);
591
592
593         if (info->control.hw_key)
594                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
595
596         /* TODO need this for burst mode later on */
597         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
598
599         /* set is_hcca to 0; it probably will never be implemented */
600         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
601
602         /* Total # bytes to be transmitted */
603         len = (u16)skb->len;
604         tx->len = cpu_to_le16(len);
605
606         iwl_dbg_log_tx_data_frame(priv, len, hdr);
607         iwl_update_stats(priv, true, fc, len);
608         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
609         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
610
611         if (!ieee80211_has_morefrags(hdr->frame_control)) {
612                 txq->need_update = 1;
613                 if (qc)
614                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
615         } else {
616                 wait_write_ptr = 1;
617                 txq->need_update = 0;
618         }
619
620         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
621                      le16_to_cpu(out_cmd->hdr.sequence));
622         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
623         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
624         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
625                            ieee80211_hdrlen(fc));
626
627         /*
628          * Use the first empty entry in this queue's command buffer array
629          * to contain the Tx command and MAC header concatenated together
630          * (payload data will be in another buffer).
631          * Size of this varies, due to varying MAC header length.
632          * If end is not dword aligned, we'll have 2 extra bytes at the end
633          * of the MAC header (device reads on dword boundaries).
634          * We'll tell device about this padding later.
635          */
636         len = sizeof(struct iwl3945_tx_cmd) +
637                         sizeof(struct iwl_cmd_header) + hdr_len;
638
639         len_org = len;
640         len = (len + 3) & ~3;
641
642         if (len_org != len)
643                 len_org = 1;
644         else
645                 len_org = 0;
646
647         /* Physical address of this Tx command's header (not MAC header!),
648          * within command buffer array. */
649         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
650                                     len, PCI_DMA_TODEVICE);
651         /* we do not map meta data ... so we can safely access address to
652          * provide to unmap command*/
653         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
654         pci_unmap_len_set(out_meta, len, len);
655
656         /* Add buffer containing Tx command and MAC(!) header to TFD's
657          * first entry */
658         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
659                                                    txcmd_phys, len, 1, 0);
660
661
662         /* Set up TFD's 2nd entry to point directly to remainder of skb,
663          * if any (802.11 null frames have no payload). */
664         len = skb->len - hdr_len;
665         if (len) {
666                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
667                                            len, PCI_DMA_TODEVICE);
668                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
669                                                            phys_addr, len,
670                                                            0, U32_PAD(len));
671         }
672
673
674         /* Tell device the write index *just past* this latest filled TFD */
675         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
676         rc = iwl_txq_update_write_ptr(priv, txq);
677         spin_unlock_irqrestore(&priv->lock, flags);
678
679         if (rc)
680                 return rc;
681
682         if ((iwl_queue_space(q) < q->high_mark)
683             && priv->mac80211_registered) {
684                 if (wait_write_ptr) {
685                         spin_lock_irqsave(&priv->lock, flags);
686                         txq->need_update = 1;
687                         iwl_txq_update_write_ptr(priv, txq);
688                         spin_unlock_irqrestore(&priv->lock, flags);
689                 }
690
691                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
692         }
693
694         return 0;
695
696 drop_unlock:
697         spin_unlock_irqrestore(&priv->lock, flags);
698 drop:
699         return -1;
700 }
701
702 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
703
704 #include "iwl-spectrum.h"
705
706 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
707 #define BEACON_TIME_MASK_HIGH   0xFF000000
708 #define TIME_UNIT               1024
709
710 /*
711  * extended beacon time format
712  * time in usec will be changed into a 32-bit value in 8:24 format
713  * the high 1 byte is the beacon counts
714  * the lower 3 bytes is the time in usec within one beacon interval
715  */
716
717 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
718 {
719         u32 quot;
720         u32 rem;
721         u32 interval = beacon_interval * 1024;
722
723         if (!interval || !usec)
724                 return 0;
725
726         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
727         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
728
729         return (quot << 24) + rem;
730 }
731
732 /* base is usually what we get from ucode with each received frame,
733  * the same as HW timer counter counting down
734  */
735
736 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
737 {
738         u32 base_low = base & BEACON_TIME_MASK_LOW;
739         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
740         u32 interval = beacon_interval * TIME_UNIT;
741         u32 res = (base & BEACON_TIME_MASK_HIGH) +
742             (addon & BEACON_TIME_MASK_HIGH);
743
744         if (base_low > addon_low)
745                 res += base_low - addon_low;
746         else if (base_low < addon_low) {
747                 res += interval + base_low - addon_low;
748                 res += (1 << 24);
749         } else
750                 res += (1 << 24);
751
752         return cpu_to_le32(res);
753 }
754
755 static int iwl3945_get_measurement(struct iwl_priv *priv,
756                                struct ieee80211_measurement_params *params,
757                                u8 type)
758 {
759         struct iwl_spectrum_cmd spectrum;
760         struct iwl_rx_packet *res;
761         struct iwl_host_cmd cmd = {
762                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
763                 .data = (void *)&spectrum,
764                 .flags = CMD_WANT_SKB,
765         };
766         u32 add_time = le64_to_cpu(params->start_time);
767         int rc;
768         int spectrum_resp_status;
769         int duration = le16_to_cpu(params->duration);
770
771         if (iwl_is_associated(priv))
772                 add_time =
773                     iwl3945_usecs_to_beacons(
774                         le64_to_cpu(params->start_time) - priv->last_tsf,
775                         le16_to_cpu(priv->rxon_timing.beacon_interval));
776
777         memset(&spectrum, 0, sizeof(spectrum));
778
779         spectrum.channel_count = cpu_to_le16(1);
780         spectrum.flags =
781             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
782         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
783         cmd.len = sizeof(spectrum);
784         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
785
786         if (iwl_is_associated(priv))
787                 spectrum.start_time =
788                     iwl3945_add_beacon_time(priv->last_beacon_time,
789                                 add_time,
790                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
791         else
792                 spectrum.start_time = 0;
793
794         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
795         spectrum.channels[0].channel = params->channel;
796         spectrum.channels[0].type = type;
797         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
798                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
799                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
800
801         rc = iwl_send_cmd_sync(priv, &cmd);
802         if (rc)
803                 return rc;
804
805         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
806         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
807                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
808                 rc = -EIO;
809         }
810
811         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
812         switch (spectrum_resp_status) {
813         case 0:         /* Command will be handled */
814                 if (res->u.spectrum.id != 0xff) {
815                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
816                                                 res->u.spectrum.id);
817                         priv->measurement_status &= ~MEASUREMENT_READY;
818                 }
819                 priv->measurement_status |= MEASUREMENT_ACTIVE;
820                 rc = 0;
821                 break;
822
823         case 1:         /* Command will not be handled */
824                 rc = -EAGAIN;
825                 break;
826         }
827
828         dev_kfree_skb_any(cmd.reply_skb);
829
830         return rc;
831 }
832 #endif
833
834 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
835                                struct iwl_rx_mem_buffer *rxb)
836 {
837         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
838         struct iwl_alive_resp *palive;
839         struct delayed_work *pwork;
840
841         palive = &pkt->u.alive_frame;
842
843         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
844                        "0x%01X 0x%01X\n",
845                        palive->is_valid, palive->ver_type,
846                        palive->ver_subtype);
847
848         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
849                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
850                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
851                        sizeof(struct iwl_alive_resp));
852                 pwork = &priv->init_alive_start;
853         } else {
854                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
855                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
856                        sizeof(struct iwl_alive_resp));
857                 pwork = &priv->alive_start;
858                 iwl3945_disable_events(priv);
859         }
860
861         /* We delay the ALIVE response by 5ms to
862          * give the HW RF Kill time to activate... */
863         if (palive->is_valid == UCODE_VALID_OK)
864                 queue_delayed_work(priv->workqueue, pwork,
865                                    msecs_to_jiffies(5));
866         else
867                 IWL_WARN(priv, "uCode did not respond OK.\n");
868 }
869
870 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
871                                  struct iwl_rx_mem_buffer *rxb)
872 {
873 #ifdef CONFIG_IWLWIFI_DEBUG
874         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
875 #endif
876
877         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
878         return;
879 }
880
881 static void iwl3945_bg_beacon_update(struct work_struct *work)
882 {
883         struct iwl_priv *priv =
884                 container_of(work, struct iwl_priv, beacon_update);
885         struct sk_buff *beacon;
886
887         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
888         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
889
890         if (!beacon) {
891                 IWL_ERR(priv, "update beacon failed\n");
892                 return;
893         }
894
895         mutex_lock(&priv->mutex);
896         /* new beacon skb is allocated every time; dispose previous.*/
897         if (priv->ibss_beacon)
898                 dev_kfree_skb(priv->ibss_beacon);
899
900         priv->ibss_beacon = beacon;
901         mutex_unlock(&priv->mutex);
902
903         iwl3945_send_beacon_cmd(priv);
904 }
905
906 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
907                                 struct iwl_rx_mem_buffer *rxb)
908 {
909 #ifdef CONFIG_IWLWIFI_DEBUG
910         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
911         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
912         u8 rate = beacon->beacon_notify_hdr.rate;
913
914         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
915                 "tsf %d %d rate %d\n",
916                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
917                 beacon->beacon_notify_hdr.failure_frame,
918                 le32_to_cpu(beacon->ibss_mgr_status),
919                 le32_to_cpu(beacon->high_tsf),
920                 le32_to_cpu(beacon->low_tsf), rate);
921 #endif
922
923         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
924             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
925                 queue_work(priv->workqueue, &priv->beacon_update);
926 }
927
928 /* Handle notification from uCode that card's power state is changing
929  * due to software, hardware, or critical temperature RFKILL */
930 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
931                                     struct iwl_rx_mem_buffer *rxb)
932 {
933         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
934         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
935         unsigned long status = priv->status;
936
937         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
938                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
939                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
940
941         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
942                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
943
944         if (flags & HW_CARD_DISABLED)
945                 set_bit(STATUS_RF_KILL_HW, &priv->status);
946         else
947                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
948
949
950         iwl_scan_cancel(priv);
951
952         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
953              test_bit(STATUS_RF_KILL_HW, &priv->status)))
954                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
955                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
956         else
957                 wake_up_interruptible(&priv->wait_command_queue);
958 }
959
960 /**
961  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
962  *
963  * Setup the RX handlers for each of the reply types sent from the uCode
964  * to the host.
965  *
966  * This function chains into the hardware specific files for them to setup
967  * any hardware specific handlers as well.
968  */
969 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
970 {
971         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
972         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
973         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
974         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
975         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
976         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
977             iwl_rx_pm_debug_statistics_notif;
978         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
979
980         /*
981          * The same handler is used for both the REPLY to a discrete
982          * statistics request from the host as well as for the periodic
983          * statistics notifications (after received beacons) from the uCode.
984          */
985         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
986         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
987
988         iwl_setup_spectrum_handlers(priv);
989         iwl_setup_rx_scan_handlers(priv);
990         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
991
992         /* Set up hardware specific Rx handlers */
993         iwl3945_hw_rx_handler_setup(priv);
994 }
995
996 /************************** RX-FUNCTIONS ****************************/
997 /*
998  * Rx theory of operation
999  *
1000  * The host allocates 32 DMA target addresses and passes the host address
1001  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1002  * 0 to 31
1003  *
1004  * Rx Queue Indexes
1005  * The host/firmware share two index registers for managing the Rx buffers.
1006  *
1007  * The READ index maps to the first position that the firmware may be writing
1008  * to -- the driver can read up to (but not including) this position and get
1009  * good data.
1010  * The READ index is managed by the firmware once the card is enabled.
1011  *
1012  * The WRITE index maps to the last position the driver has read from -- the
1013  * position preceding WRITE is the last slot the firmware can place a packet.
1014  *
1015  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1016  * WRITE = READ.
1017  *
1018  * During initialization, the host sets up the READ queue position to the first
1019  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1020  *
1021  * When the firmware places a packet in a buffer, it will advance the READ index
1022  * and fire the RX interrupt.  The driver can then query the READ index and
1023  * process as many packets as possible, moving the WRITE index forward as it
1024  * resets the Rx queue buffers with new memory.
1025  *
1026  * The management in the driver is as follows:
1027  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1028  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1029  *   to replenish the iwl->rxq->rx_free.
1030  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1031  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1032  *   'processed' and 'read' driver indexes as well)
1033  * + A received packet is processed and handed to the kernel network stack,
1034  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1035  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1036  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1037  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1038  *   were enough free buffers and RX_STALLED is set it is cleared.
1039  *
1040  *
1041  * Driver sequence:
1042  *
1043  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1044  *                            iwl3945_rx_queue_restock
1045  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1046  *                            queue, updates firmware pointers, and updates
1047  *                            the WRITE index.  If insufficient rx_free buffers
1048  *                            are available, schedules iwl3945_rx_replenish
1049  *
1050  * -- enable interrupts --
1051  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1052  *                            READ INDEX, detaching the SKB from the pool.
1053  *                            Moves the packet buffer from queue to rx_used.
1054  *                            Calls iwl3945_rx_queue_restock to refill any empty
1055  *                            slots.
1056  * ...
1057  *
1058  */
1059
1060 /**
1061  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1062  */
1063 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1064                                           dma_addr_t dma_addr)
1065 {
1066         return cpu_to_le32((u32)dma_addr);
1067 }
1068
1069 /**
1070  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1071  *
1072  * If there are slots in the RX queue that need to be restocked,
1073  * and we have free pre-allocated buffers, fill the ranks as much
1074  * as we can, pulling from rx_free.
1075  *
1076  * This moves the 'write' index forward to catch up with 'processed', and
1077  * also updates the memory address in the firmware to reference the new
1078  * target buffer.
1079  */
1080 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1081 {
1082         struct iwl_rx_queue *rxq = &priv->rxq;
1083         struct list_head *element;
1084         struct iwl_rx_mem_buffer *rxb;
1085         unsigned long flags;
1086         int write, rc;
1087
1088         spin_lock_irqsave(&rxq->lock, flags);
1089         write = rxq->write & ~0x7;
1090         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1091                 /* Get next free Rx buffer, remove from free list */
1092                 element = rxq->rx_free.next;
1093                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1094                 list_del(element);
1095
1096                 /* Point to Rx buffer via next RBD in circular buffer */
1097                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1098                 rxq->queue[rxq->write] = rxb;
1099                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1100                 rxq->free_count--;
1101         }
1102         spin_unlock_irqrestore(&rxq->lock, flags);
1103         /* If the pre-allocated buffer pool is dropping low, schedule to
1104          * refill it */
1105         if (rxq->free_count <= RX_LOW_WATERMARK)
1106                 queue_work(priv->workqueue, &priv->rx_replenish);
1107
1108
1109         /* If we've added more space for the firmware to place data, tell it.
1110          * Increment device's write pointer in multiples of 8. */
1111         if ((rxq->write_actual != (rxq->write & ~0x7))
1112             || (abs(rxq->write - rxq->read) > 7)) {
1113                 spin_lock_irqsave(&rxq->lock, flags);
1114                 rxq->need_update = 1;
1115                 spin_unlock_irqrestore(&rxq->lock, flags);
1116                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1117                 if (rc)
1118                         return rc;
1119         }
1120
1121         return 0;
1122 }
1123
1124 /**
1125  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1126  *
1127  * When moving to rx_free an SKB is allocated for the slot.
1128  *
1129  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1130  * This is called as a scheduled work item (except for during initialization)
1131  */
1132 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1133 {
1134         struct iwl_rx_queue *rxq = &priv->rxq;
1135         struct list_head *element;
1136         struct iwl_rx_mem_buffer *rxb;
1137         struct sk_buff *skb;
1138         unsigned long flags;
1139
1140         while (1) {
1141                 spin_lock_irqsave(&rxq->lock, flags);
1142
1143                 if (list_empty(&rxq->rx_used)) {
1144                         spin_unlock_irqrestore(&rxq->lock, flags);
1145                         return;
1146                 }
1147                 spin_unlock_irqrestore(&rxq->lock, flags);
1148
1149                 /* Alloc a new receive buffer */
1150                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1151                 if (!skb) {
1152                         if (net_ratelimit())
1153                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1154                         /* We don't reschedule replenish work here -- we will
1155                          * call the restock method and if it still needs
1156                          * more buffers it will schedule replenish */
1157                         break;
1158                 }
1159
1160                 spin_lock_irqsave(&rxq->lock, flags);
1161                 if (list_empty(&rxq->rx_used)) {
1162                         spin_unlock_irqrestore(&rxq->lock, flags);
1163                         dev_kfree_skb_any(skb);
1164                         return;
1165                 }
1166                 element = rxq->rx_used.next;
1167                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1168                 list_del(element);
1169                 spin_unlock_irqrestore(&rxq->lock, flags);
1170
1171                 rxb->skb = skb;
1172
1173                 /* If radiotap head is required, reserve some headroom here.
1174                  * The physical head count is a variable rx_stats->phy_count.
1175                  * We reserve 4 bytes here. Plus these extra bytes, the
1176                  * headroom of the physical head should be enough for the
1177                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1178                  */
1179                 skb_reserve(rxb->skb, 4);
1180
1181                 /* Get physical address of RB/SKB */
1182                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1183                                                 rxb->skb->data,
1184                                                 priv->hw_params.rx_buf_size,
1185                                                 PCI_DMA_FROMDEVICE);
1186
1187                 spin_lock_irqsave(&rxq->lock, flags);
1188                 list_add_tail(&rxb->list, &rxq->rx_free);
1189                 priv->alloc_rxb_skb++;
1190                 rxq->free_count++;
1191                 spin_unlock_irqrestore(&rxq->lock, flags);
1192         }
1193 }
1194
1195 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1196 {
1197         unsigned long flags;
1198         int i;
1199         spin_lock_irqsave(&rxq->lock, flags);
1200         INIT_LIST_HEAD(&rxq->rx_free);
1201         INIT_LIST_HEAD(&rxq->rx_used);
1202         /* Fill the rx_used queue with _all_ of the Rx buffers */
1203         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1204                 /* In the reset function, these buffers may have been allocated
1205                  * to an SKB, so we need to unmap and free potential storage */
1206                 if (rxq->pool[i].skb != NULL) {
1207                         pci_unmap_single(priv->pci_dev,
1208                                          rxq->pool[i].real_dma_addr,
1209                                          priv->hw_params.rx_buf_size,
1210                                          PCI_DMA_FROMDEVICE);
1211                         priv->alloc_rxb_skb--;
1212                         dev_kfree_skb(rxq->pool[i].skb);
1213                         rxq->pool[i].skb = NULL;
1214                 }
1215                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1216         }
1217
1218         /* Set us so that we have processed and used all buffers, but have
1219          * not restocked the Rx queue with fresh buffers */
1220         rxq->read = rxq->write = 0;
1221         rxq->free_count = 0;
1222         rxq->write_actual = 0;
1223         spin_unlock_irqrestore(&rxq->lock, flags);
1224 }
1225
1226 void iwl3945_rx_replenish(void *data)
1227 {
1228         struct iwl_priv *priv = data;
1229         unsigned long flags;
1230
1231         iwl3945_rx_allocate(priv, GFP_KERNEL);
1232
1233         spin_lock_irqsave(&priv->lock, flags);
1234         iwl3945_rx_queue_restock(priv);
1235         spin_unlock_irqrestore(&priv->lock, flags);
1236 }
1237
1238 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1239 {
1240         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1241
1242         iwl3945_rx_queue_restock(priv);
1243 }
1244
1245
1246 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1247  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1248  * This free routine walks the list of POOL entries and if SKB is set to
1249  * non NULL it is unmapped and freed
1250  */
1251 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1252 {
1253         int i;
1254         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1255                 if (rxq->pool[i].skb != NULL) {
1256                         pci_unmap_single(priv->pci_dev,
1257                                          rxq->pool[i].real_dma_addr,
1258                                          priv->hw_params.rx_buf_size,
1259                                          PCI_DMA_FROMDEVICE);
1260                         dev_kfree_skb(rxq->pool[i].skb);
1261                 }
1262         }
1263
1264         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1265                             rxq->dma_addr);
1266         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1267                             rxq->rb_stts, rxq->rb_stts_dma);
1268         rxq->bd = NULL;
1269         rxq->rb_stts  = NULL;
1270 }
1271
1272
1273 /* Convert linear signal-to-noise ratio into dB */
1274 static u8 ratio2dB[100] = {
1275 /*       0   1   2   3   4   5   6   7   8   9 */
1276          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1277         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1278         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1279         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1280         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1281         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1282         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1283         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1284         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1285         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1286 };
1287
1288 /* Calculates a relative dB value from a ratio of linear
1289  *   (i.e. not dB) signal levels.
1290  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1291 int iwl3945_calc_db_from_ratio(int sig_ratio)
1292 {
1293         /* 1000:1 or higher just report as 60 dB */
1294         if (sig_ratio >= 1000)
1295                 return 60;
1296
1297         /* 100:1 or higher, divide by 10 and use table,
1298          *   add 20 dB to make up for divide by 10 */
1299         if (sig_ratio >= 100)
1300                 return 20 + (int)ratio2dB[sig_ratio/10];
1301
1302         /* We shouldn't see this */
1303         if (sig_ratio < 1)
1304                 return 0;
1305
1306         /* Use table for ratios 1:1 - 99:1 */
1307         return (int)ratio2dB[sig_ratio];
1308 }
1309
1310 #define PERFECT_RSSI (-20) /* dBm */
1311 #define WORST_RSSI (-95)   /* dBm */
1312 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1313
1314 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1315  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1316  *   about formulas used below. */
1317 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1318 {
1319         int sig_qual;
1320         int degradation = PERFECT_RSSI - rssi_dbm;
1321
1322         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1323          * as indicator; formula is (signal dbm - noise dbm).
1324          * SNR at or above 40 is a great signal (100%).
1325          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1326          * Weakest usable signal is usually 10 - 15 dB SNR. */
1327         if (noise_dbm) {
1328                 if (rssi_dbm - noise_dbm >= 40)
1329                         return 100;
1330                 else if (rssi_dbm < noise_dbm)
1331                         return 0;
1332                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1333
1334         /* Else use just the signal level.
1335          * This formula is a least squares fit of data points collected and
1336          *   compared with a reference system that had a percentage (%) display
1337          *   for signal quality. */
1338         } else
1339                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1340                             (15 * RSSI_RANGE + 62 * degradation)) /
1341                            (RSSI_RANGE * RSSI_RANGE);
1342
1343         if (sig_qual > 100)
1344                 sig_qual = 100;
1345         else if (sig_qual < 1)
1346                 sig_qual = 0;
1347
1348         return sig_qual;
1349 }
1350
1351 /**
1352  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1353  *
1354  * Uses the priv->rx_handlers callback function array to invoke
1355  * the appropriate handlers, including command responses,
1356  * frame-received notifications, and other notifications.
1357  */
1358 static void iwl3945_rx_handle(struct iwl_priv *priv)
1359 {
1360         struct iwl_rx_mem_buffer *rxb;
1361         struct iwl_rx_packet *pkt;
1362         struct iwl_rx_queue *rxq = &priv->rxq;
1363         u32 r, i;
1364         int reclaim;
1365         unsigned long flags;
1366         u8 fill_rx = 0;
1367         u32 count = 8;
1368         int total_empty = 0;
1369
1370         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1371          * buffer that the driver may process (last buffer filled by ucode). */
1372         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1373         i = rxq->read;
1374
1375         /* calculate total frames need to be restock after handling RX */
1376         total_empty = r - priv->rxq.write_actual;
1377         if (total_empty < 0)
1378                 total_empty += RX_QUEUE_SIZE;
1379
1380         if (total_empty > (RX_QUEUE_SIZE / 2))
1381                 fill_rx = 1;
1382         /* Rx interrupt, but nothing sent from uCode */
1383         if (i == r)
1384                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1385
1386         while (i != r) {
1387                 rxb = rxq->queue[i];
1388
1389                 /* If an RXB doesn't have a Rx queue slot associated with it,
1390                  * then a bug has been introduced in the queue refilling
1391                  * routines -- catch it here */
1392                 BUG_ON(rxb == NULL);
1393
1394                 rxq->queue[i] = NULL;
1395
1396                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1397                                 priv->hw_params.rx_buf_size,
1398                                 PCI_DMA_FROMDEVICE);
1399                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1400
1401                 /* Reclaim a command buffer only if this packet is a response
1402                  *   to a (driver-originated) command.
1403                  * If the packet (e.g. Rx frame) originated from uCode,
1404                  *   there is no command buffer to reclaim.
1405                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1406                  *   but apparently a few don't get set; catch them here. */
1407                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1408                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1409                         (pkt->hdr.cmd != REPLY_TX);
1410
1411                 /* Based on type of command response or notification,
1412                  *   handle those that need handling via function in
1413                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1414                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1415                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1416                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1417                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1418                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1419                 } else {
1420                         /* No handling needed */
1421                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1422                                 r, i, get_cmd_string(pkt->hdr.cmd),
1423                                 pkt->hdr.cmd);
1424                 }
1425
1426                 if (reclaim) {
1427                         /* Invoke any callbacks, transfer the skb to caller, and
1428                          * fire off the (possibly) blocking iwl_send_cmd()
1429                          * as we reclaim the driver command queue */
1430                         if (rxb && rxb->skb)
1431                                 iwl_tx_cmd_complete(priv, rxb);
1432                         else
1433                                 IWL_WARN(priv, "Claim null rxb?\n");
1434                 }
1435
1436                 /* For now we just don't re-use anything.  We can tweak this
1437                  * later to try and re-use notification packets and SKBs that
1438                  * fail to Rx correctly */
1439                 if (rxb->skb != NULL) {
1440                         priv->alloc_rxb_skb--;
1441                         dev_kfree_skb_any(rxb->skb);
1442                         rxb->skb = NULL;
1443                 }
1444
1445                 spin_lock_irqsave(&rxq->lock, flags);
1446                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1447                 spin_unlock_irqrestore(&rxq->lock, flags);
1448                 i = (i + 1) & RX_QUEUE_MASK;
1449                 /* If there are a lot of unused frames,
1450                  * restock the Rx queue so ucode won't assert. */
1451                 if (fill_rx) {
1452                         count++;
1453                         if (count >= 8) {
1454                                 priv->rxq.read = i;
1455                                 iwl3945_rx_replenish_now(priv);
1456                                 count = 0;
1457                         }
1458                 }
1459         }
1460
1461         /* Backtrack one entry */
1462         priv->rxq.read = i;
1463         if (fill_rx)
1464                 iwl3945_rx_replenish_now(priv);
1465         else
1466                 iwl3945_rx_queue_restock(priv);
1467 }
1468
1469 /* call this function to flush any scheduled tasklet */
1470 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1471 {
1472         /* wait to make sure we flush pending tasklet*/
1473         synchronize_irq(priv->pci_dev->irq);
1474         tasklet_kill(&priv->irq_tasklet);
1475 }
1476
1477 static const char *desc_lookup(int i)
1478 {
1479         switch (i) {
1480         case 1:
1481                 return "FAIL";
1482         case 2:
1483                 return "BAD_PARAM";
1484         case 3:
1485                 return "BAD_CHECKSUM";
1486         case 4:
1487                 return "NMI_INTERRUPT";
1488         case 5:
1489                 return "SYSASSERT";
1490         case 6:
1491                 return "FATAL_ERROR";
1492         }
1493
1494         return "UNKNOWN";
1495 }
1496
1497 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1498 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1499
1500 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1501 {
1502         u32 i;
1503         u32 desc, time, count, base, data1;
1504         u32 blink1, blink2, ilink1, ilink2;
1505
1506         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1507
1508         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1509                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1510                 return;
1511         }
1512
1513
1514         count = iwl_read_targ_mem(priv, base);
1515
1516         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1517                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1518                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1519                         priv->status, count);
1520         }
1521
1522         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1523                   "ilink1  nmiPC   Line\n");
1524         for (i = ERROR_START_OFFSET;
1525              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1526              i += ERROR_ELEM_SIZE) {
1527                 desc = iwl_read_targ_mem(priv, base + i);
1528                 time =
1529                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1530                 blink1 =
1531                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1532                 blink2 =
1533                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1534                 ilink1 =
1535                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1536                 ilink2 =
1537                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1538                 data1 =
1539                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1540
1541                 IWL_ERR(priv,
1542                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1543                         desc_lookup(desc), desc, time, blink1, blink2,
1544                         ilink1, ilink2, data1);
1545         }
1546
1547 }
1548
1549 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1550
1551 /**
1552  * iwl3945_print_event_log - Dump error event log to syslog
1553  *
1554  */
1555 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1556                                 u32 num_events, u32 mode)
1557 {
1558         u32 i;
1559         u32 base;       /* SRAM byte address of event log header */
1560         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1561         u32 ptr;        /* SRAM byte address of log data */
1562         u32 ev, time, data; /* event log data */
1563
1564         if (num_events == 0)
1565                 return;
1566
1567         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1568
1569         if (mode == 0)
1570                 event_size = 2 * sizeof(u32);
1571         else
1572                 event_size = 3 * sizeof(u32);
1573
1574         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1575
1576         /* "time" is actually "data" for mode 0 (no timestamp).
1577          * place event id # at far right for easier visual parsing. */
1578         for (i = 0; i < num_events; i++) {
1579                 ev = iwl_read_targ_mem(priv, ptr);
1580                 ptr += sizeof(u32);
1581                 time = iwl_read_targ_mem(priv, ptr);
1582                 ptr += sizeof(u32);
1583                 if (mode == 0) {
1584                         /* data, ev */
1585                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1586                 } else {
1587                         data = iwl_read_targ_mem(priv, ptr);
1588                         ptr += sizeof(u32);
1589                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1590                 }
1591         }
1592 }
1593
1594 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1595 {
1596         u32 base;       /* SRAM byte address of event log header */
1597         u32 capacity;   /* event log capacity in # entries */
1598         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1599         u32 num_wraps;  /* # times uCode wrapped to top of log */
1600         u32 next_entry; /* index of next entry to be written by uCode */
1601         u32 size;       /* # entries that we'll print */
1602
1603         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1604         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1605                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1606                 return;
1607         }
1608
1609         /* event log header */
1610         capacity = iwl_read_targ_mem(priv, base);
1611         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1612         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1613         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1614
1615         size = num_wraps ? capacity : next_entry;
1616
1617         /* bail out if nothing in log */
1618         if (size == 0) {
1619                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1620                 return;
1621         }
1622
1623         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1624                   size, num_wraps);
1625
1626         /* if uCode has wrapped back to top of log, start at the oldest entry,
1627          * i.e the next one that uCode would fill. */
1628         if (num_wraps)
1629                 iwl3945_print_event_log(priv, next_entry,
1630                                     capacity - next_entry, mode);
1631
1632         /* (then/else) start at top of log */
1633         iwl3945_print_event_log(priv, 0, next_entry, mode);
1634
1635 }
1636
1637 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1638 {
1639         u32 inta, handled = 0;
1640         u32 inta_fh;
1641         unsigned long flags;
1642 #ifdef CONFIG_IWLWIFI_DEBUG
1643         u32 inta_mask;
1644 #endif
1645
1646         spin_lock_irqsave(&priv->lock, flags);
1647
1648         /* Ack/clear/reset pending uCode interrupts.
1649          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1650          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1651         inta = iwl_read32(priv, CSR_INT);
1652         iwl_write32(priv, CSR_INT, inta);
1653
1654         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1655          * Any new interrupts that happen after this, either while we're
1656          * in this tasklet, or later, will show up in next ISR/tasklet. */
1657         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1658         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1659
1660 #ifdef CONFIG_IWLWIFI_DEBUG
1661         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1662                 /* just for debug */
1663                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1664                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1665                               inta, inta_mask, inta_fh);
1666         }
1667 #endif
1668
1669         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1670          * atomic, make sure that inta covers all the interrupts that
1671          * we've discovered, even if FH interrupt came in just after
1672          * reading CSR_INT. */
1673         if (inta_fh & CSR39_FH_INT_RX_MASK)
1674                 inta |= CSR_INT_BIT_FH_RX;
1675         if (inta_fh & CSR39_FH_INT_TX_MASK)
1676                 inta |= CSR_INT_BIT_FH_TX;
1677
1678         /* Now service all interrupt bits discovered above. */
1679         if (inta & CSR_INT_BIT_HW_ERR) {
1680                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1681
1682                 /* Tell the device to stop sending interrupts */
1683                 iwl_disable_interrupts(priv);
1684
1685                 priv->isr_stats.hw++;
1686                 iwl_irq_handle_error(priv);
1687
1688                 handled |= CSR_INT_BIT_HW_ERR;
1689
1690                 spin_unlock_irqrestore(&priv->lock, flags);
1691
1692                 return;
1693         }
1694
1695 #ifdef CONFIG_IWLWIFI_DEBUG
1696         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1697                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1698                 if (inta & CSR_INT_BIT_SCD) {
1699                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1700                                       "the frame/frames.\n");
1701                         priv->isr_stats.sch++;
1702                 }
1703
1704                 /* Alive notification via Rx interrupt will do the real work */
1705                 if (inta & CSR_INT_BIT_ALIVE) {
1706                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1707                         priv->isr_stats.alive++;
1708                 }
1709         }
1710 #endif
1711         /* Safely ignore these bits for debug checks below */
1712         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1713
1714         /* Error detected by uCode */
1715         if (inta & CSR_INT_BIT_SW_ERR) {
1716                 IWL_ERR(priv, "Microcode SW error detected. "
1717                         "Restarting 0x%X.\n", inta);
1718                 priv->isr_stats.sw++;
1719                 priv->isr_stats.sw_err = inta;
1720                 iwl_irq_handle_error(priv);
1721                 handled |= CSR_INT_BIT_SW_ERR;
1722         }
1723
1724         /* uCode wakes up after power-down sleep */
1725         if (inta & CSR_INT_BIT_WAKEUP) {
1726                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1727                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1728                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1729                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1730                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1731                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1732                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1733                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1734
1735                 priv->isr_stats.wakeup++;
1736                 handled |= CSR_INT_BIT_WAKEUP;
1737         }
1738
1739         /* All uCode command responses, including Tx command responses,
1740          * Rx "responses" (frame-received notification), and other
1741          * notifications from uCode come through here*/
1742         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1743                 iwl3945_rx_handle(priv);
1744                 priv->isr_stats.rx++;
1745                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1746         }
1747
1748         if (inta & CSR_INT_BIT_FH_TX) {
1749                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1750                 priv->isr_stats.tx++;
1751
1752                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1753                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1754                                         (FH39_SRVC_CHNL), 0x0);
1755                 handled |= CSR_INT_BIT_FH_TX;
1756         }
1757
1758         if (inta & ~handled) {
1759                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1760                 priv->isr_stats.unhandled++;
1761         }
1762
1763         if (inta & ~priv->inta_mask) {
1764                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1765                          inta & ~priv->inta_mask);
1766                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1767         }
1768
1769         /* Re-enable all interrupts */
1770         /* only Re-enable if disabled by irq */
1771         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1772                 iwl_enable_interrupts(priv);
1773
1774 #ifdef CONFIG_IWLWIFI_DEBUG
1775         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1776                 inta = iwl_read32(priv, CSR_INT);
1777                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1778                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1779                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1780                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1781         }
1782 #endif
1783         spin_unlock_irqrestore(&priv->lock, flags);
1784 }
1785
1786 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1787                                          enum ieee80211_band band,
1788                                      u8 is_active, u8 n_probes,
1789                                      struct iwl3945_scan_channel *scan_ch)
1790 {
1791         struct ieee80211_channel *chan;
1792         const struct ieee80211_supported_band *sband;
1793         const struct iwl_channel_info *ch_info;
1794         u16 passive_dwell = 0;
1795         u16 active_dwell = 0;
1796         int added, i;
1797
1798         sband = iwl_get_hw_mode(priv, band);
1799         if (!sband)
1800                 return 0;
1801
1802         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1803         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1804
1805         if (passive_dwell <= active_dwell)
1806                 passive_dwell = active_dwell + 1;
1807
1808         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1809                 chan = priv->scan_request->channels[i];
1810
1811                 if (chan->band != band)
1812                         continue;
1813
1814                 scan_ch->channel = chan->hw_value;
1815
1816                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1817                 if (!is_channel_valid(ch_info)) {
1818                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1819                                        scan_ch->channel);
1820                         continue;
1821                 }
1822
1823                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1824                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1825                 /* If passive , set up for auto-switch
1826                  *  and use long active_dwell time.
1827                  */
1828                 if (!is_active || is_channel_passive(ch_info) ||
1829                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1830                         scan_ch->type = 0;      /* passive */
1831                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1832                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1833                 } else {
1834                         scan_ch->type = 1;      /* active */
1835                 }
1836
1837                 /* Set direct probe bits. These may be used both for active
1838                  * scan channels (probes gets sent right away),
1839                  * or for passive channels (probes get se sent only after
1840                  * hearing clear Rx packet).*/
1841                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1842                         if (n_probes)
1843                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1844                 } else {
1845                         /* uCode v1 does not allow setting direct probe bits on
1846                          * passive channel. */
1847                         if ((scan_ch->type & 1) && n_probes)
1848                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1849                 }
1850
1851                 /* Set txpower levels to defaults */
1852                 scan_ch->tpc.dsp_atten = 110;
1853                 /* scan_pwr_info->tpc.dsp_atten; */
1854
1855                 /*scan_pwr_info->tpc.tx_gain; */
1856                 if (band == IEEE80211_BAND_5GHZ)
1857                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1858                 else {
1859                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1860                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1861                          * power level:
1862                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1863                          */
1864                 }
1865
1866                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1867                                scan_ch->channel,
1868                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1869                                (scan_ch->type & 1) ?
1870                                active_dwell : passive_dwell);
1871
1872                 scan_ch++;
1873                 added++;
1874         }
1875
1876         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1877         return added;
1878 }
1879
1880 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1881                               struct ieee80211_rate *rates)
1882 {
1883         int i;
1884
1885         for (i = 0; i < IWL_RATE_COUNT; i++) {
1886                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1887                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1888                 rates[i].hw_value_short = i;
1889                 rates[i].flags = 0;
1890                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1891                         /*
1892                          * If CCK != 1M then set short preamble rate flag.
1893                          */
1894                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1895                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1896                 }
1897         }
1898 }
1899
1900 /******************************************************************************
1901  *
1902  * uCode download functions
1903  *
1904  ******************************************************************************/
1905
1906 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1907 {
1908         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1909         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1910         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1911         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1912         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1913         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1914 }
1915
1916 /**
1917  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1918  *     looking at all data.
1919  */
1920 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1921 {
1922         u32 val;
1923         u32 save_len = len;
1924         int rc = 0;
1925         u32 errcnt;
1926
1927         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1928
1929         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1930                                IWL39_RTC_INST_LOWER_BOUND);
1931
1932         errcnt = 0;
1933         for (; len > 0; len -= sizeof(u32), image++) {
1934                 /* read data comes through single port, auto-incr addr */
1935                 /* NOTE: Use the debugless read so we don't flood kernel log
1936                  * if IWL_DL_IO is set */
1937                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1938                 if (val != le32_to_cpu(*image)) {
1939                         IWL_ERR(priv, "uCode INST section is invalid at "
1940                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1941                                   save_len - len, val, le32_to_cpu(*image));
1942                         rc = -EIO;
1943                         errcnt++;
1944                         if (errcnt >= 20)
1945                                 break;
1946                 }
1947         }
1948
1949
1950         if (!errcnt)
1951                 IWL_DEBUG_INFO(priv,
1952                         "ucode image in INSTRUCTION memory is good\n");
1953
1954         return rc;
1955 }
1956
1957
1958 /**
1959  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1960  *   using sample data 100 bytes apart.  If these sample points are good,
1961  *   it's a pretty good bet that everything between them is good, too.
1962  */
1963 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1964 {
1965         u32 val;
1966         int rc = 0;
1967         u32 errcnt = 0;
1968         u32 i;
1969
1970         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1971
1972         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1973                 /* read data comes through single port, auto-incr addr */
1974                 /* NOTE: Use the debugless read so we don't flood kernel log
1975                  * if IWL_DL_IO is set */
1976                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1977                         i + IWL39_RTC_INST_LOWER_BOUND);
1978                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1979                 if (val != le32_to_cpu(*image)) {
1980 #if 0 /* Enable this if you want to see details */
1981                         IWL_ERR(priv, "uCode INST section is invalid at "
1982                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1983                                   i, val, *image);
1984 #endif
1985                         rc = -EIO;
1986                         errcnt++;
1987                         if (errcnt >= 3)
1988                                 break;
1989                 }
1990         }
1991
1992         return rc;
1993 }
1994
1995
1996 /**
1997  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1998  *    and verify its contents
1999  */
2000 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2001 {
2002         __le32 *image;
2003         u32 len;
2004         int rc = 0;
2005
2006         /* Try bootstrap */
2007         image = (__le32 *)priv->ucode_boot.v_addr;
2008         len = priv->ucode_boot.len;
2009         rc = iwl3945_verify_inst_sparse(priv, image, len);
2010         if (rc == 0) {
2011                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2012                 return 0;
2013         }
2014
2015         /* Try initialize */
2016         image = (__le32 *)priv->ucode_init.v_addr;
2017         len = priv->ucode_init.len;
2018         rc = iwl3945_verify_inst_sparse(priv, image, len);
2019         if (rc == 0) {
2020                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2021                 return 0;
2022         }
2023
2024         /* Try runtime/protocol */
2025         image = (__le32 *)priv->ucode_code.v_addr;
2026         len = priv->ucode_code.len;
2027         rc = iwl3945_verify_inst_sparse(priv, image, len);
2028         if (rc == 0) {
2029                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2030                 return 0;
2031         }
2032
2033         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2034
2035         /* Since nothing seems to match, show first several data entries in
2036          * instruction SRAM, so maybe visual inspection will give a clue.
2037          * Selection of bootstrap image (vs. other images) is arbitrary. */
2038         image = (__le32 *)priv->ucode_boot.v_addr;
2039         len = priv->ucode_boot.len;
2040         rc = iwl3945_verify_inst_full(priv, image, len);
2041
2042         return rc;
2043 }
2044
2045 static void iwl3945_nic_start(struct iwl_priv *priv)
2046 {
2047         /* Remove all resets to allow NIC to operate */
2048         iwl_write32(priv, CSR_RESET, 0);
2049 }
2050
2051 /**
2052  * iwl3945_read_ucode - Read uCode images from disk file.
2053  *
2054  * Copy into buffers for card to fetch via bus-mastering
2055  */
2056 static int iwl3945_read_ucode(struct iwl_priv *priv)
2057 {
2058         const struct iwl_ucode_header *ucode;
2059         int ret = -EINVAL, index;
2060         const struct firmware *ucode_raw;
2061         /* firmware file name contains uCode/driver compatibility version */
2062         const char *name_pre = priv->cfg->fw_name_pre;
2063         const unsigned int api_max = priv->cfg->ucode_api_max;
2064         const unsigned int api_min = priv->cfg->ucode_api_min;
2065         char buf[25];
2066         u8 *src;
2067         size_t len;
2068         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2069
2070         /* Ask kernel firmware_class module to get the boot firmware off disk.
2071          * request_firmware() is synchronous, file is in memory on return. */
2072         for (index = api_max; index >= api_min; index--) {
2073                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2074                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2075                 if (ret < 0) {
2076                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2077                                   buf, ret);
2078                         if (ret == -ENOENT)
2079                                 continue;
2080                         else
2081                                 goto error;
2082                 } else {
2083                         if (index < api_max)
2084                                 IWL_ERR(priv, "Loaded firmware %s, "
2085                                         "which is deprecated. "
2086                                         " Please use API v%u instead.\n",
2087                                           buf, api_max);
2088                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2089                                        "(%zd bytes) from disk\n",
2090                                        buf, ucode_raw->size);
2091                         break;
2092                 }
2093         }
2094
2095         if (ret < 0)
2096                 goto error;
2097
2098         /* Make sure that we got at least our header! */
2099         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2100                 IWL_ERR(priv, "File size way too small!\n");
2101                 ret = -EINVAL;
2102                 goto err_release;
2103         }
2104
2105         /* Data from ucode file:  header followed by uCode images */
2106         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2107
2108         priv->ucode_ver = le32_to_cpu(ucode->ver);
2109         api_ver = IWL_UCODE_API(priv->ucode_ver);
2110         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2111         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2112         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2113         init_data_size =
2114                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2115         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2116         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2117
2118         /* api_ver should match the api version forming part of the
2119          * firmware filename ... but we don't check for that and only rely
2120          * on the API version read from firmware header from here on forward */
2121
2122         if (api_ver < api_min || api_ver > api_max) {
2123                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2124                           "Driver supports v%u, firmware is v%u.\n",
2125                           api_max, api_ver);
2126                 priv->ucode_ver = 0;
2127                 ret = -EINVAL;
2128                 goto err_release;
2129         }
2130         if (api_ver != api_max)
2131                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2132                           "got %u. New firmware can be obtained "
2133                           "from http://www.intellinuxwireless.org.\n",
2134                           api_max, api_ver);
2135
2136         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2137                 IWL_UCODE_MAJOR(priv->ucode_ver),
2138                 IWL_UCODE_MINOR(priv->ucode_ver),
2139                 IWL_UCODE_API(priv->ucode_ver),
2140                 IWL_UCODE_SERIAL(priv->ucode_ver));
2141
2142         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2143                        priv->ucode_ver);
2144         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2145                        inst_size);
2146         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2147                        data_size);
2148         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2149                        init_size);
2150         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2151                        init_data_size);
2152         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2153                        boot_size);
2154
2155
2156         /* Verify size of file vs. image size info in file's header */
2157         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2158                 inst_size + data_size + init_size +
2159                 init_data_size + boot_size) {
2160
2161                 IWL_DEBUG_INFO(priv,
2162                         "uCode file size %zd does not match expected size\n",
2163                         ucode_raw->size);
2164                 ret = -EINVAL;
2165                 goto err_release;
2166         }
2167
2168         /* Verify that uCode images will fit in card's SRAM */
2169         if (inst_size > IWL39_MAX_INST_SIZE) {
2170                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2171                                inst_size);
2172                 ret = -EINVAL;
2173                 goto err_release;
2174         }
2175
2176         if (data_size > IWL39_MAX_DATA_SIZE) {
2177                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2178                                data_size);
2179                 ret = -EINVAL;
2180                 goto err_release;
2181         }
2182         if (init_size > IWL39_MAX_INST_SIZE) {
2183                 IWL_DEBUG_INFO(priv,
2184                                 "uCode init instr len %d too large to fit in\n",
2185                                 init_size);
2186                 ret = -EINVAL;
2187                 goto err_release;
2188         }
2189         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2190                 IWL_DEBUG_INFO(priv,
2191                                 "uCode init data len %d too large to fit in\n",
2192                                 init_data_size);
2193                 ret = -EINVAL;
2194                 goto err_release;
2195         }
2196         if (boot_size > IWL39_MAX_BSM_SIZE) {
2197                 IWL_DEBUG_INFO(priv,
2198                                 "uCode boot instr len %d too large to fit in\n",
2199                                 boot_size);
2200                 ret = -EINVAL;
2201                 goto err_release;
2202         }
2203
2204         /* Allocate ucode buffers for card's bus-master loading ... */
2205
2206         /* Runtime instructions and 2 copies of data:
2207          * 1) unmodified from disk
2208          * 2) backup cache for save/restore during power-downs */
2209         priv->ucode_code.len = inst_size;
2210         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2211
2212         priv->ucode_data.len = data_size;
2213         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2214
2215         priv->ucode_data_backup.len = data_size;
2216         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2217
2218         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2219             !priv->ucode_data_backup.v_addr)
2220                 goto err_pci_alloc;
2221
2222         /* Initialization instructions and data */
2223         if (init_size && init_data_size) {
2224                 priv->ucode_init.len = init_size;
2225                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2226
2227                 priv->ucode_init_data.len = init_data_size;
2228                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2229
2230                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2231                         goto err_pci_alloc;
2232         }
2233
2234         /* Bootstrap (instructions only, no data) */
2235         if (boot_size) {
2236                 priv->ucode_boot.len = boot_size;
2237                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2238
2239                 if (!priv->ucode_boot.v_addr)
2240                         goto err_pci_alloc;
2241         }
2242
2243         /* Copy images into buffers for card's bus-master reads ... */
2244
2245         /* Runtime instructions (first block of data in file) */
2246         len = inst_size;
2247         IWL_DEBUG_INFO(priv,
2248                 "Copying (but not loading) uCode instr len %zd\n", len);
2249         memcpy(priv->ucode_code.v_addr, src, len);
2250         src += len;
2251
2252         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2253                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2254
2255         /* Runtime data (2nd block)
2256          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2257         len = data_size;
2258         IWL_DEBUG_INFO(priv,
2259                 "Copying (but not loading) uCode data len %zd\n", len);
2260         memcpy(priv->ucode_data.v_addr, src, len);
2261         memcpy(priv->ucode_data_backup.v_addr, src, len);
2262         src += len;
2263
2264         /* Initialization instructions (3rd block) */
2265         if (init_size) {
2266                 len = init_size;
2267                 IWL_DEBUG_INFO(priv,
2268                         "Copying (but not loading) init instr len %zd\n", len);
2269                 memcpy(priv->ucode_init.v_addr, src, len);
2270                 src += len;
2271         }
2272
2273         /* Initialization data (4th block) */
2274         if (init_data_size) {
2275                 len = init_data_size;
2276                 IWL_DEBUG_INFO(priv,
2277                         "Copying (but not loading) init data len %zd\n", len);
2278                 memcpy(priv->ucode_init_data.v_addr, src, len);
2279                 src += len;
2280         }
2281
2282         /* Bootstrap instructions (5th block) */
2283         len = boot_size;
2284         IWL_DEBUG_INFO(priv,
2285                 "Copying (but not loading) boot instr len %zd\n", len);
2286         memcpy(priv->ucode_boot.v_addr, src, len);
2287
2288         /* We have our copies now, allow OS release its copies */
2289         release_firmware(ucode_raw);
2290         return 0;
2291
2292  err_pci_alloc:
2293         IWL_ERR(priv, "failed to allocate pci memory\n");
2294         ret = -ENOMEM;
2295         iwl3945_dealloc_ucode_pci(priv);
2296
2297  err_release:
2298         release_firmware(ucode_raw);
2299
2300  error:
2301         return ret;
2302 }
2303
2304
2305 /**
2306  * iwl3945_set_ucode_ptrs - Set uCode address location
2307  *
2308  * Tell initialization uCode where to find runtime uCode.
2309  *
2310  * BSM registers initially contain pointers to initialization uCode.
2311  * We need to replace them to load runtime uCode inst and data,
2312  * and to save runtime data when powering down.
2313  */
2314 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2315 {
2316         dma_addr_t pinst;
2317         dma_addr_t pdata;
2318
2319         /* bits 31:0 for 3945 */
2320         pinst = priv->ucode_code.p_addr;
2321         pdata = priv->ucode_data_backup.p_addr;
2322
2323         /* Tell bootstrap uCode where to find image to load */
2324         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2325         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2326         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2327                                  priv->ucode_data.len);
2328
2329         /* Inst byte count must be last to set up, bit 31 signals uCode
2330          *   that all new ptr/size info is in place */
2331         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2332                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2333
2334         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2335
2336         return 0;
2337 }
2338
2339 /**
2340  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2341  *
2342  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2343  *
2344  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2345  */
2346 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2347 {
2348         /* Check alive response for "valid" sign from uCode */
2349         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2350                 /* We had an error bringing up the hardware, so take it
2351                  * all the way back down so we can try again */
2352                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2353                 goto restart;
2354         }
2355
2356         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2357          * This is a paranoid check, because we would not have gotten the
2358          * "initialize" alive if code weren't properly loaded.  */
2359         if (iwl3945_verify_ucode(priv)) {
2360                 /* Runtime instruction load was bad;
2361                  * take it all the way back down so we can try again */
2362                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2363                 goto restart;
2364         }
2365
2366         /* Send pointers to protocol/runtime uCode image ... init code will
2367          * load and launch runtime uCode, which will send us another "Alive"
2368          * notification. */
2369         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2370         if (iwl3945_set_ucode_ptrs(priv)) {
2371                 /* Runtime instruction load won't happen;
2372                  * take it all the way back down so we can try again */
2373                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2374                 goto restart;
2375         }
2376         return;
2377
2378  restart:
2379         queue_work(priv->workqueue, &priv->restart);
2380 }
2381
2382 /**
2383  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2384  *                   from protocol/runtime uCode (initialization uCode's
2385  *                   Alive gets handled by iwl3945_init_alive_start()).
2386  */
2387 static void iwl3945_alive_start(struct iwl_priv *priv)
2388 {
2389         int thermal_spin = 0;
2390         u32 rfkill;
2391
2392         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2393
2394         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2395                 /* We had an error bringing up the hardware, so take it
2396                  * all the way back down so we can try again */
2397                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2398                 goto restart;
2399         }
2400
2401         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2402          * This is a paranoid check, because we would not have gotten the
2403          * "runtime" alive if code weren't properly loaded.  */
2404         if (iwl3945_verify_ucode(priv)) {
2405                 /* Runtime instruction load was bad;
2406                  * take it all the way back down so we can try again */
2407                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2408                 goto restart;
2409         }
2410
2411         iwl_clear_stations_table(priv);
2412
2413         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2414         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2415
2416         if (rfkill & 0x1) {
2417                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2418                 /* if RFKILL is not on, then wait for thermal
2419                  * sensor in adapter to kick in */
2420                 while (iwl3945_hw_get_temperature(priv) == 0) {
2421                         thermal_spin++;
2422                         udelay(10);
2423                 }
2424
2425                 if (thermal_spin)
2426                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2427                                        thermal_spin * 10);
2428         } else
2429                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2430
2431         /* After the ALIVE response, we can send commands to 3945 uCode */
2432         set_bit(STATUS_ALIVE, &priv->status);
2433
2434         if (iwl_is_rfkill(priv))
2435                 return;
2436
2437         ieee80211_wake_queues(priv->hw);
2438
2439         priv->active_rate = priv->rates_mask;
2440         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2441
2442         iwl_power_update_mode(priv, false);
2443
2444         if (iwl_is_associated(priv)) {
2445                 struct iwl3945_rxon_cmd *active_rxon =
2446                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2447
2448                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2449                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2450         } else {
2451                 /* Initialize our rx_config data */
2452                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2453         }
2454
2455         /* Configure Bluetooth device coexistence support */
2456         iwl_send_bt_config(priv);
2457
2458         /* Configure the adapter for unassociated operation */
2459         iwlcore_commit_rxon(priv);
2460
2461         iwl3945_reg_txpower_periodic(priv);
2462
2463         iwl3945_led_register(priv);
2464
2465         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2466         set_bit(STATUS_READY, &priv->status);
2467         wake_up_interruptible(&priv->wait_command_queue);
2468
2469         /* reassociate for ADHOC mode */
2470         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2471                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2472                                                                 priv->vif);
2473                 if (beacon)
2474                         iwl_mac_beacon_update(priv->hw, beacon);
2475         }
2476
2477         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2478                 iwl_set_mode(priv, priv->iw_mode);
2479
2480         return;
2481
2482  restart:
2483         queue_work(priv->workqueue, &priv->restart);
2484 }
2485
2486 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2487
2488 static void __iwl3945_down(struct iwl_priv *priv)
2489 {
2490         unsigned long flags;
2491         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2492         struct ieee80211_conf *conf = NULL;
2493
2494         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2495
2496         conf = ieee80211_get_hw_conf(priv->hw);
2497
2498         if (!exit_pending)
2499                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2500
2501         iwl3945_led_unregister(priv);
2502         iwl_clear_stations_table(priv);
2503
2504         /* Unblock any waiting calls */
2505         wake_up_interruptible_all(&priv->wait_command_queue);
2506
2507         /* Wipe out the EXIT_PENDING status bit if we are not actually
2508          * exiting the module */
2509         if (!exit_pending)
2510                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2511
2512         /* stop and reset the on-board processor */
2513         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2514
2515         /* tell the device to stop sending interrupts */
2516         spin_lock_irqsave(&priv->lock, flags);
2517         iwl_disable_interrupts(priv);
2518         spin_unlock_irqrestore(&priv->lock, flags);
2519         iwl_synchronize_irq(priv);
2520
2521         if (priv->mac80211_registered)
2522                 ieee80211_stop_queues(priv->hw);
2523
2524         /* If we have not previously called iwl3945_init() then
2525          * clear all bits but the RF Kill bits and return */
2526         if (!iwl_is_init(priv)) {
2527                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2528                                         STATUS_RF_KILL_HW |
2529                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2530                                         STATUS_GEO_CONFIGURED |
2531                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2532                                         STATUS_EXIT_PENDING;
2533                 goto exit;
2534         }
2535
2536         /* ...otherwise clear out all the status bits but the RF Kill
2537          * bit and continue taking the NIC down. */
2538         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2539                                 STATUS_RF_KILL_HW |
2540                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2541                                 STATUS_GEO_CONFIGURED |
2542                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2543                                 STATUS_FW_ERROR |
2544                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2545                                 STATUS_EXIT_PENDING;
2546
2547         priv->cfg->ops->lib->apm_ops.reset(priv);
2548         spin_lock_irqsave(&priv->lock, flags);
2549         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2550         spin_unlock_irqrestore(&priv->lock, flags);
2551
2552         iwl3945_hw_txq_ctx_stop(priv);
2553         iwl3945_hw_rxq_stop(priv);
2554
2555         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2556                                 APMG_CLK_VAL_DMA_CLK_RQT);
2557
2558         udelay(5);
2559
2560         if (exit_pending)
2561                 priv->cfg->ops->lib->apm_ops.stop(priv);
2562         else
2563                 priv->cfg->ops->lib->apm_ops.reset(priv);
2564
2565  exit:
2566         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2567
2568         if (priv->ibss_beacon)
2569                 dev_kfree_skb(priv->ibss_beacon);
2570         priv->ibss_beacon = NULL;
2571
2572         /* clear out any free frames */
2573         iwl3945_clear_free_frames(priv);
2574 }
2575
2576 static void iwl3945_down(struct iwl_priv *priv)
2577 {
2578         mutex_lock(&priv->mutex);
2579         __iwl3945_down(priv);
2580         mutex_unlock(&priv->mutex);
2581
2582         iwl3945_cancel_deferred_work(priv);
2583 }
2584
2585 #define MAX_HW_RESTARTS 5
2586
2587 static int __iwl3945_up(struct iwl_priv *priv)
2588 {
2589         int rc, i;
2590
2591         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2592                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2593                 return -EIO;
2594         }
2595
2596         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2597                 IWL_ERR(priv, "ucode not available for device bring up\n");
2598                 return -EIO;
2599         }
2600
2601         /* If platform's RF_KILL switch is NOT set to KILL */
2602         if (iwl_read32(priv, CSR_GP_CNTRL) &
2603                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2604                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2605         else {
2606                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2607                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2608                 return -ENODEV;
2609         }
2610
2611         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2612
2613         rc = iwl3945_hw_nic_init(priv);
2614         if (rc) {
2615                 IWL_ERR(priv, "Unable to int nic\n");
2616                 return rc;
2617         }
2618
2619         /* make sure rfkill handshake bits are cleared */
2620         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2621         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2622                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2623
2624         /* clear (again), then enable host interrupts */
2625         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2626         iwl_enable_interrupts(priv);
2627
2628         /* really make sure rfkill handshake bits are cleared */
2629         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2630         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2631
2632         /* Copy original ucode data image from disk into backup cache.
2633          * This will be used to initialize the on-board processor's
2634          * data SRAM for a clean start when the runtime program first loads. */
2635         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2636                priv->ucode_data.len);
2637
2638         /* We return success when we resume from suspend and rf_kill is on. */
2639         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2640                 return 0;
2641
2642         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2643
2644                 iwl_clear_stations_table(priv);
2645
2646                 /* load bootstrap state machine,
2647                  * load bootstrap program into processor's memory,
2648                  * prepare to load the "initialize" uCode */
2649                 priv->cfg->ops->lib->load_ucode(priv);
2650
2651                 if (rc) {
2652                         IWL_ERR(priv,
2653                                 "Unable to set up bootstrap uCode: %d\n", rc);
2654                         continue;
2655                 }
2656
2657                 /* start card; "initialize" will load runtime ucode */
2658                 iwl3945_nic_start(priv);
2659
2660                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2661
2662                 return 0;
2663         }
2664
2665         set_bit(STATUS_EXIT_PENDING, &priv->status);
2666         __iwl3945_down(priv);
2667         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2668
2669         /* tried to restart and config the device for as long as our
2670          * patience could withstand */
2671         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2672         return -EIO;
2673 }
2674
2675
2676 /*****************************************************************************
2677  *
2678  * Workqueue callbacks
2679  *
2680  *****************************************************************************/
2681
2682 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2683 {
2684         struct iwl_priv *priv =
2685             container_of(data, struct iwl_priv, init_alive_start.work);
2686
2687         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2688                 return;
2689
2690         mutex_lock(&priv->mutex);
2691         iwl3945_init_alive_start(priv);
2692         mutex_unlock(&priv->mutex);
2693 }
2694
2695 static void iwl3945_bg_alive_start(struct work_struct *data)
2696 {
2697         struct iwl_priv *priv =
2698             container_of(data, struct iwl_priv, alive_start.work);
2699
2700         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2701                 return;
2702
2703         mutex_lock(&priv->mutex);
2704         iwl3945_alive_start(priv);
2705         mutex_unlock(&priv->mutex);
2706 }
2707
2708 static void iwl3945_rfkill_poll(struct work_struct *data)
2709 {
2710         struct iwl_priv *priv =
2711             container_of(data, struct iwl_priv, rfkill_poll.work);
2712
2713         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2714                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2715         else
2716                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2717
2718         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2719                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2720
2721         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2722                            round_jiffies_relative(2 * HZ));
2723
2724 }
2725
2726 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2727 static void iwl3945_bg_request_scan(struct work_struct *data)
2728 {
2729         struct iwl_priv *priv =
2730             container_of(data, struct iwl_priv, request_scan);
2731         struct iwl_host_cmd cmd = {
2732                 .id = REPLY_SCAN_CMD,
2733                 .len = sizeof(struct iwl3945_scan_cmd),
2734                 .flags = CMD_SIZE_HUGE,
2735         };
2736         int rc = 0;
2737         struct iwl3945_scan_cmd *scan;
2738         struct ieee80211_conf *conf = NULL;
2739         u8 n_probes = 0;
2740         enum ieee80211_band band;
2741         bool is_active = false;
2742
2743         conf = ieee80211_get_hw_conf(priv->hw);
2744
2745         mutex_lock(&priv->mutex);
2746
2747         cancel_delayed_work(&priv->scan_check);
2748
2749         if (!iwl_is_ready(priv)) {
2750                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2751                 goto done;
2752         }
2753
2754         /* Make sure the scan wasn't canceled before this queued work
2755          * was given the chance to run... */
2756         if (!test_bit(STATUS_SCANNING, &priv->status))
2757                 goto done;
2758
2759         /* This should never be called or scheduled if there is currently
2760          * a scan active in the hardware. */
2761         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2762                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2763                                 "Ignoring second request.\n");
2764                 rc = -EIO;
2765                 goto done;
2766         }
2767
2768         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2769                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2770                 goto done;
2771         }
2772
2773         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2774                 IWL_DEBUG_HC(priv,
2775                         "Scan request while abort pending. Queuing.\n");
2776                 goto done;
2777         }
2778
2779         if (iwl_is_rfkill(priv)) {
2780                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2781                 goto done;
2782         }
2783
2784         if (!test_bit(STATUS_READY, &priv->status)) {
2785                 IWL_DEBUG_HC(priv,
2786                         "Scan request while uninitialized. Queuing.\n");
2787                 goto done;
2788         }
2789
2790         if (!priv->scan_bands) {
2791                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2792                 goto done;
2793         }
2794
2795         if (!priv->scan) {
2796                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2797                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2798                 if (!priv->scan) {
2799                         rc = -ENOMEM;
2800                         goto done;
2801                 }
2802         }
2803         scan = priv->scan;
2804         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2805
2806         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2807         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2808
2809         if (iwl_is_associated(priv)) {
2810                 u16 interval = 0;
2811                 u32 extra;
2812                 u32 suspend_time = 100;
2813                 u32 scan_suspend_time = 100;
2814                 unsigned long flags;
2815
2816                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2817
2818                 spin_lock_irqsave(&priv->lock, flags);
2819                 interval = priv->beacon_int;
2820                 spin_unlock_irqrestore(&priv->lock, flags);
2821
2822                 scan->suspend_time = 0;
2823                 scan->max_out_time = cpu_to_le32(200 * 1024);
2824                 if (!interval)
2825                         interval = suspend_time;
2826                 /*
2827                  * suspend time format:
2828                  *  0-19: beacon interval in usec (time before exec.)
2829                  * 20-23: 0
2830                  * 24-31: number of beacons (suspend between channels)
2831                  */
2832
2833                 extra = (suspend_time / interval) << 24;
2834                 scan_suspend_time = 0xFF0FFFFF &
2835                     (extra | ((suspend_time % interval) * 1024));
2836
2837                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2838                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2839                                scan_suspend_time, interval);
2840         }
2841
2842         if (priv->scan_request->n_ssids) {
2843                 int i, p = 0;
2844                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2845                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2846                         /* always does wildcard anyway */
2847                         if (!priv->scan_request->ssids[i].ssid_len)
2848                                 continue;
2849                         scan->direct_scan[p].id = WLAN_EID_SSID;
2850                         scan->direct_scan[p].len =
2851                                 priv->scan_request->ssids[i].ssid_len;
2852                         memcpy(scan->direct_scan[p].ssid,
2853                                priv->scan_request->ssids[i].ssid,
2854                                priv->scan_request->ssids[i].ssid_len);
2855                         n_probes++;
2856                         p++;
2857                 }
2858                 is_active = true;
2859         } else
2860                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2861
2862         /* We don't build a direct scan probe request; the uCode will do
2863          * that based on the direct_mask added to each channel entry */
2864         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2865         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2866         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2867
2868         /* flags + rate selection */
2869
2870         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2871                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2872                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2873                 scan->good_CRC_th = 0;
2874                 band = IEEE80211_BAND_2GHZ;
2875         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2876                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2877                 /*
2878                  * If active scaning is requested but a certain channel
2879                  * is marked passive, we can do active scanning if we
2880                  * detect transmissions.
2881                  */
2882                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2883                 band = IEEE80211_BAND_5GHZ;
2884         } else {
2885                 IWL_WARN(priv, "Invalid scan band count\n");
2886                 goto done;
2887         }
2888
2889         scan->tx_cmd.len = cpu_to_le16(
2890                         iwl_fill_probe_req(priv,
2891                                 (struct ieee80211_mgmt *)scan->data,
2892                                 priv->scan_request->ie,
2893                                 priv->scan_request->ie_len,
2894                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2895
2896         /* select Rx antennas */
2897         scan->flags |= iwl3945_get_antenna_flags(priv);
2898
2899         if (iwl_is_monitor_mode(priv))
2900                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2901
2902         scan->channel_count =
2903                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2904                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2905
2906         if (scan->channel_count == 0) {
2907                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2908                 goto done;
2909         }
2910
2911         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2912             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2913         cmd.data = scan;
2914         scan->len = cpu_to_le16(cmd.len);
2915
2916         set_bit(STATUS_SCAN_HW, &priv->status);
2917         rc = iwl_send_cmd_sync(priv, &cmd);
2918         if (rc)
2919                 goto done;
2920
2921         queue_delayed_work(priv->workqueue, &priv->scan_check,
2922                            IWL_SCAN_CHECK_WATCHDOG);
2923
2924         mutex_unlock(&priv->mutex);
2925         return;
2926
2927  done:
2928         /* can not perform scan make sure we clear scanning
2929          * bits from status so next scan request can be performed.
2930          * if we dont clear scanning status bit here all next scan
2931          * will fail
2932         */
2933         clear_bit(STATUS_SCAN_HW, &priv->status);
2934         clear_bit(STATUS_SCANNING, &priv->status);
2935
2936         /* inform mac80211 scan aborted */
2937         queue_work(priv->workqueue, &priv->scan_completed);
2938         mutex_unlock(&priv->mutex);
2939 }
2940
2941 static void iwl3945_bg_up(struct work_struct *data)
2942 {
2943         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2944
2945         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2946                 return;
2947
2948         mutex_lock(&priv->mutex);
2949         __iwl3945_up(priv);
2950         mutex_unlock(&priv->mutex);
2951 }
2952
2953 static void iwl3945_bg_restart(struct work_struct *data)
2954 {
2955         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2956
2957         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2958                 return;
2959
2960         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2961                 mutex_lock(&priv->mutex);
2962                 priv->vif = NULL;
2963                 priv->is_open = 0;
2964                 mutex_unlock(&priv->mutex);
2965                 iwl3945_down(priv);
2966                 ieee80211_restart_hw(priv->hw);
2967         } else {
2968                 iwl3945_down(priv);
2969                 queue_work(priv->workqueue, &priv->up);
2970         }
2971 }
2972
2973 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2974 {
2975         struct iwl_priv *priv =
2976             container_of(data, struct iwl_priv, rx_replenish);
2977
2978         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2979                 return;
2980
2981         mutex_lock(&priv->mutex);
2982         iwl3945_rx_replenish(priv);
2983         mutex_unlock(&priv->mutex);
2984 }
2985
2986 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2987
2988 void iwl3945_post_associate(struct iwl_priv *priv)
2989 {
2990         int rc = 0;
2991         struct ieee80211_conf *conf = NULL;
2992
2993         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2994                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2995                 return;
2996         }
2997
2998
2999         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3000                         priv->assoc_id, priv->active_rxon.bssid_addr);
3001
3002         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3003                 return;
3004
3005         if (!priv->vif || !priv->is_open)
3006                 return;
3007
3008         iwl_scan_cancel_timeout(priv, 200);
3009
3010         conf = ieee80211_get_hw_conf(priv->hw);
3011
3012         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3013         iwlcore_commit_rxon(priv);
3014
3015         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3016         iwl_setup_rxon_timing(priv);
3017         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3018                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3019         if (rc)
3020                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3021                             "Attempting to continue.\n");
3022
3023         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3024
3025         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3026
3027         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3028                         priv->assoc_id, priv->beacon_int);
3029
3030         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3031                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3032         else
3033                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3034
3035         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3036                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3037                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3038                 else
3039                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3040
3041                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3042                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3043
3044         }
3045
3046         iwlcore_commit_rxon(priv);
3047
3048         switch (priv->iw_mode) {
3049         case NL80211_IFTYPE_STATION:
3050                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3051                 break;
3052
3053         case NL80211_IFTYPE_ADHOC:
3054
3055                 priv->assoc_id = 1;
3056                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3057                 iwl3945_sync_sta(priv, IWL_STA_ID,
3058                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3059                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3060                                  CMD_ASYNC);
3061                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3062                 iwl3945_send_beacon_cmd(priv);
3063
3064                 break;
3065
3066         default:
3067                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3068                            __func__, priv->iw_mode);
3069                 break;
3070         }
3071
3072         iwl_activate_qos(priv, 0);
3073
3074         /* we have just associated, don't start scan too early */
3075         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3076 }
3077
3078 /*****************************************************************************
3079  *
3080  * mac80211 entry point functions
3081  *
3082  *****************************************************************************/
3083
3084 #define UCODE_READY_TIMEOUT     (2 * HZ)
3085