Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2010 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/sched.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/ieee80211_radiotap.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-core.h"
57 #include "iwl-helpers.h"
58 #include "iwl-dev.h"
59 #include "iwl-spectrum.h"
60
61 /*
62  * module name, copyright, version, etc.
63  */
64
65 #define DRV_DESCRIPTION \
66 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
67
68 #ifdef CONFIG_IWLWIFI_DEBUG
69 #define VD "d"
70 #else
71 #define VD
72 #endif
73
74 /*
75  * add "s" to indicate spectrum measurement included.
76  * we add it here to be consistent with previous releases in which
77  * this was configurable.
78  */
79 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
82
83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
84 MODULE_VERSION(DRV_VERSION);
85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
86 MODULE_LICENSE("GPL");
87
88  /* module parameters */
89 struct iwl_mod_params iwl3945_mod_params = {
90         .sw_crypto = 1,
91         .restart_fw = 1,
92         /* the rest are 0 by default */
93 };
94
95 /**
96  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
97  * @priv: eeprom and antenna fields are used to determine antenna flags
98  *
99  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
100  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
101  *
102  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
103  * IWL_ANTENNA_MAIN      - Force MAIN antenna
104  * IWL_ANTENNA_AUX       - Force AUX antenna
105  */
106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
107 {
108         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
109
110         switch (iwl3945_mod_params.antenna) {
111         case IWL_ANTENNA_DIVERSITY:
112                 return 0;
113
114         case IWL_ANTENNA_MAIN:
115                 if (eeprom->antenna_switch_type)
116                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
117                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
118
119         case IWL_ANTENNA_AUX:
120                 if (eeprom->antenna_switch_type)
121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
123         }
124
125         /* bad antenna selector value */
126         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
127                 iwl3945_mod_params.antenna);
128
129         return 0;               /* "diversity" is default if error */
130 }
131
132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
133                                    struct ieee80211_key_conf *keyconf,
134                                    u8 sta_id)
135 {
136         unsigned long flags;
137         __le16 key_flags = 0;
138         int ret;
139
140         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
141         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
142
143         if (sta_id == priv->hw_params.bcast_sta_id)
144                 key_flags |= STA_KEY_MULTICAST_MSK;
145
146         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
147         keyconf->hw_key_idx = keyconf->keyidx;
148         key_flags &= ~STA_KEY_FLG_INVALID;
149
150         spin_lock_irqsave(&priv->sta_lock, flags);
151         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
152         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
153         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
154                keyconf->keylen);
155
156         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
157                keyconf->keylen);
158
159         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
160                         == STA_KEY_FLG_NO_ENC)
161                 priv->stations[sta_id].sta.key.key_offset =
162                                  iwl_get_free_ucode_key_index(priv);
163         /* else, we are overriding an existing key => no need to allocated room
164         * in uCode. */
165
166         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
167                 "no space for a new key");
168
169         priv->stations[sta_id].sta.key.key_flags = key_flags;
170         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
171         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
172
173         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
174
175         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
176
177         spin_unlock_irqrestore(&priv->sta_lock, flags);
178
179         return ret;
180 }
181
182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
183                                   struct ieee80211_key_conf *keyconf,
184                                   u8 sta_id)
185 {
186         return -EOPNOTSUPP;
187 }
188
189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
190                                   struct ieee80211_key_conf *keyconf,
191                                   u8 sta_id)
192 {
193         return -EOPNOTSUPP;
194 }
195
196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
197 {
198         unsigned long flags;
199
200         spin_lock_irqsave(&priv->sta_lock, flags);
201         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
202         memset(&priv->stations[sta_id].sta.key, 0,
203                 sizeof(struct iwl4965_keyinfo));
204         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
205         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
206         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
207         spin_unlock_irqrestore(&priv->sta_lock, flags);
208
209         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
210         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
211         return 0;
212 }
213
214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
215                         struct ieee80211_key_conf *keyconf, u8 sta_id)
216 {
217         int ret = 0;
218
219         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
220
221         switch (keyconf->alg) {
222         case ALG_CCMP:
223                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
224                 break;
225         case ALG_TKIP:
226                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
227                 break;
228         case ALG_WEP:
229                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
230                 break;
231         default:
232                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
233                 ret = -EINVAL;
234         }
235
236         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
237                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
238                       sta_id, ret);
239
240         return ret;
241 }
242
243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
244 {
245         int ret = -EOPNOTSUPP;
246
247         return ret;
248 }
249
250 static int iwl3945_set_static_key(struct iwl_priv *priv,
251                                 struct ieee80211_key_conf *key)
252 {
253         if (key->alg == ALG_WEP)
254                 return -EOPNOTSUPP;
255
256         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
257         return -EINVAL;
258 }
259
260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
261 {
262         struct list_head *element;
263
264         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
265                        priv->frames_count);
266
267         while (!list_empty(&priv->free_frames)) {
268                 element = priv->free_frames.next;
269                 list_del(element);
270                 kfree(list_entry(element, struct iwl3945_frame, list));
271                 priv->frames_count--;
272         }
273
274         if (priv->frames_count) {
275                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
276                             priv->frames_count);
277                 priv->frames_count = 0;
278         }
279 }
280
281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
282 {
283         struct iwl3945_frame *frame;
284         struct list_head *element;
285         if (list_empty(&priv->free_frames)) {
286                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
287                 if (!frame) {
288                         IWL_ERR(priv, "Could not allocate frame!\n");
289                         return NULL;
290                 }
291
292                 priv->frames_count++;
293                 return frame;
294         }
295
296         element = priv->free_frames.next;
297         list_del(element);
298         return list_entry(element, struct iwl3945_frame, list);
299 }
300
301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
302 {
303         memset(frame, 0, sizeof(*frame));
304         list_add(&frame->list, &priv->free_frames);
305 }
306
307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
308                                 struct ieee80211_hdr *hdr,
309                                 int left)
310 {
311
312         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
313             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
314              (priv->iw_mode != NL80211_IFTYPE_AP)))
315                 return 0;
316
317         if (priv->ibss_beacon->len > left)
318                 return 0;
319
320         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
321
322         return priv->ibss_beacon->len;
323 }
324
325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
326 {
327         struct iwl3945_frame *frame;
328         unsigned int frame_size;
329         int rc;
330         u8 rate;
331
332         frame = iwl3945_get_free_frame(priv);
333
334         if (!frame) {
335                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
336                           "command.\n");
337                 return -ENOMEM;
338         }
339
340         rate = iwl_rate_get_lowest_plcp(priv);
341
342         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
343
344         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
345                               &frame->u.cmd[0]);
346
347         iwl3945_free_frame(priv, frame);
348
349         return rc;
350 }
351
352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
353 {
354         if (priv->shared_virt)
355                 dma_free_coherent(&priv->pci_dev->dev,
356                                   sizeof(struct iwl3945_shared),
357                                   priv->shared_virt,
358                                   priv->shared_phys);
359 }
360
361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
362                                       struct ieee80211_tx_info *info,
363                                       struct iwl_device_cmd *cmd,
364                                       struct sk_buff *skb_frag,
365                                       int sta_id)
366 {
367         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
368         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
369
370         switch (keyinfo->alg) {
371         case ALG_CCMP:
372                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
373                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
374                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
375                 break;
376
377         case ALG_TKIP:
378                 break;
379
380         case ALG_WEP:
381                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
382                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
383
384                 if (keyinfo->keylen == 13)
385                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
386
387                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
388
389                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
390                              "with key %d\n", info->control.hw_key->hw_key_idx);
391                 break;
392
393         default:
394                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
395                 break;
396         }
397 }
398
399 /*
400  * handle build REPLY_TX command notification.
401  */
402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
403                                   struct iwl_device_cmd *cmd,
404                                   struct ieee80211_tx_info *info,
405                                   struct ieee80211_hdr *hdr, u8 std_id)
406 {
407         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
408         __le32 tx_flags = tx_cmd->tx_flags;
409         __le16 fc = hdr->frame_control;
410
411         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
413                 tx_flags |= TX_CMD_FLG_ACK_MSK;
414                 if (ieee80211_is_mgmt(fc))
415                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
416                 if (ieee80211_is_probe_resp(fc) &&
417                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
418                         tx_flags |= TX_CMD_FLG_TSF_MSK;
419         } else {
420                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
422         }
423
424         tx_cmd->sta_id = std_id;
425         if (ieee80211_has_morefrags(fc))
426                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
427
428         if (ieee80211_is_data_qos(fc)) {
429                 u8 *qc = ieee80211_get_qos_ctl(hdr);
430                 tx_cmd->tid_tspec = qc[0] & 0xf;
431                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
432         } else {
433                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
434         }
435
436         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
437
438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
440
441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
442         if (ieee80211_is_mgmt(fc)) {
443                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
444                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
445                 else
446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
447         } else {
448                 tx_cmd->timeout.pm_frame_timeout = 0;
449         }
450
451         tx_cmd->driver_txop = 0;
452         tx_cmd->tx_flags = tx_flags;
453         tx_cmd->next_frame_len = 0;
454 }
455
456 /*
457  * start REPLY_TX command process
458  */
459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
460 {
461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
463         struct iwl3945_tx_cmd *tx_cmd;
464         struct iwl_tx_queue *txq = NULL;
465         struct iwl_queue *q = NULL;
466         struct iwl_device_cmd *out_cmd;
467         struct iwl_cmd_meta *out_meta;
468         dma_addr_t phys_addr;
469         dma_addr_t txcmd_phys;
470         int txq_id = skb_get_queue_mapping(skb);
471         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
472         u8 id;
473         u8 unicast;
474         u8 sta_id;
475         u8 tid = 0;
476         u16 seq_number = 0;
477         __le16 fc;
478         u8 wait_write_ptr = 0;
479         u8 *qc = NULL;
480         unsigned long flags;
481
482         spin_lock_irqsave(&priv->lock, flags);
483         if (iwl_is_rfkill(priv)) {
484                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
485                 goto drop_unlock;
486         }
487
488         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
489                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
490                 goto drop_unlock;
491         }
492
493         unicast = !is_multicast_ether_addr(hdr->addr1);
494         id = 0;
495
496         fc = hdr->frame_control;
497
498 #ifdef CONFIG_IWLWIFI_DEBUG
499         if (ieee80211_is_auth(fc))
500                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
501         else if (ieee80211_is_assoc_req(fc))
502                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
503         else if (ieee80211_is_reassoc_req(fc))
504                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
505 #endif
506
507         /* drop all non-injected data frame if we are not associated */
508         if (ieee80211_is_data(fc) &&
509             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
510             (!iwl_is_associated(priv) ||
511              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
512                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
513                 goto drop_unlock;
514         }
515
516         spin_unlock_irqrestore(&priv->lock, flags);
517
518         hdr_len = ieee80211_hdrlen(fc);
519
520         /* Find (or create) index into station table for destination station */
521         if (info->flags & IEEE80211_TX_CTL_INJECTED)
522                 sta_id = priv->hw_params.bcast_sta_id;
523         else
524                 sta_id = iwl_get_sta_id(priv, hdr);
525         if (sta_id == IWL_INVALID_STATION) {
526                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
527                                hdr->addr1);
528                 goto drop;
529         }
530
531         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
532
533         if (ieee80211_is_data_qos(fc)) {
534                 qc = ieee80211_get_qos_ctl(hdr);
535                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
536                 if (unlikely(tid >= MAX_TID_COUNT))
537                         goto drop;
538                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
539                                 IEEE80211_SCTL_SEQ;
540                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
541                         (hdr->seq_ctrl &
542                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
543                 seq_number += 0x10;
544         }
545
546         /* Descriptor for chosen Tx queue */
547         txq = &priv->txq[txq_id];
548         q = &txq->q;
549
550         if ((iwl_queue_space(q) < q->high_mark))
551                 goto drop;
552
553         spin_lock_irqsave(&priv->lock, flags);
554
555         idx = get_cmd_index(q, q->write_ptr, 0);
556
557         /* Set up driver data for this TFD */
558         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
559         txq->txb[q->write_ptr].skb[0] = skb;
560
561         /* Init first empty entry in queue's array of Tx/cmd buffers */
562         out_cmd = txq->cmd[idx];
563         out_meta = &txq->meta[idx];
564         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
565         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
566         memset(tx_cmd, 0, sizeof(*tx_cmd));
567
568         /*
569          * Set up the Tx-command (not MAC!) header.
570          * Store the chosen Tx queue and TFD index within the sequence field;
571          * after Tx, uCode's Tx response will return this value so driver can
572          * locate the frame within the tx queue and do post-tx processing.
573          */
574         out_cmd->hdr.cmd = REPLY_TX;
575         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
576                                 INDEX_TO_SEQ(q->write_ptr)));
577
578         /* Copy MAC header from skb into command buffer */
579         memcpy(tx_cmd->hdr, hdr, hdr_len);
580
581
582         if (info->control.hw_key)
583                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
584
585         /* TODO need this for burst mode later on */
586         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
587
588         /* set is_hcca to 0; it probably will never be implemented */
589         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
590
591         /* Total # bytes to be transmitted */
592         len = (u16)skb->len;
593         tx_cmd->len = cpu_to_le16(len);
594
595         iwl_dbg_log_tx_data_frame(priv, len, hdr);
596         iwl_update_stats(priv, true, fc, len);
597         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
598         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
599
600         if (!ieee80211_has_morefrags(hdr->frame_control)) {
601                 txq->need_update = 1;
602                 if (qc)
603                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
604         } else {
605                 wait_write_ptr = 1;
606                 txq->need_update = 0;
607         }
608
609         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
610                      le16_to_cpu(out_cmd->hdr.sequence));
611         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
612         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
613         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
614                            ieee80211_hdrlen(fc));
615
616         /*
617          * Use the first empty entry in this queue's command buffer array
618          * to contain the Tx command and MAC header concatenated together
619          * (payload data will be in another buffer).
620          * Size of this varies, due to varying MAC header length.
621          * If end is not dword aligned, we'll have 2 extra bytes at the end
622          * of the MAC header (device reads on dword boundaries).
623          * We'll tell device about this padding later.
624          */
625         len = sizeof(struct iwl3945_tx_cmd) +
626                         sizeof(struct iwl_cmd_header) + hdr_len;
627
628         len_org = len;
629         len = (len + 3) & ~3;
630
631         if (len_org != len)
632                 len_org = 1;
633         else
634                 len_org = 0;
635
636         /* Physical address of this Tx command's header (not MAC header!),
637          * within command buffer array. */
638         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
639                                     len, PCI_DMA_TODEVICE);
640         /* we do not map meta data ... so we can safely access address to
641          * provide to unmap command*/
642         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
643         pci_unmap_len_set(out_meta, len, len);
644
645         /* Add buffer containing Tx command and MAC(!) header to TFD's
646          * first entry */
647         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
648                                                    txcmd_phys, len, 1, 0);
649
650
651         /* Set up TFD's 2nd entry to point directly to remainder of skb,
652          * if any (802.11 null frames have no payload). */
653         len = skb->len - hdr_len;
654         if (len) {
655                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
656                                            len, PCI_DMA_TODEVICE);
657                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
658                                                            phys_addr, len,
659                                                            0, U32_PAD(len));
660         }
661
662
663         /* Tell device the write index *just past* this latest filled TFD */
664         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
665         iwl_txq_update_write_ptr(priv, txq);
666         spin_unlock_irqrestore(&priv->lock, flags);
667
668         if ((iwl_queue_space(q) < q->high_mark)
669             && priv->mac80211_registered) {
670                 if (wait_write_ptr) {
671                         spin_lock_irqsave(&priv->lock, flags);
672                         txq->need_update = 1;
673                         iwl_txq_update_write_ptr(priv, txq);
674                         spin_unlock_irqrestore(&priv->lock, flags);
675                 }
676
677                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
678         }
679
680         return 0;
681
682 drop_unlock:
683         spin_unlock_irqrestore(&priv->lock, flags);
684 drop:
685         return -1;
686 }
687
688 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
689 #define BEACON_TIME_MASK_HIGH   0xFF000000
690 #define TIME_UNIT               1024
691
692 /*
693  * extended beacon time format
694  * time in usec will be changed into a 32-bit value in 8:24 format
695  * the high 1 byte is the beacon counts
696  * the lower 3 bytes is the time in usec within one beacon interval
697  */
698
699 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
700 {
701         u32 quot;
702         u32 rem;
703         u32 interval = beacon_interval * 1024;
704
705         if (!interval || !usec)
706                 return 0;
707
708         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
709         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
710
711         return (quot << 24) + rem;
712 }
713
714 /* base is usually what we get from ucode with each received frame,
715  * the same as HW timer counter counting down
716  */
717
718 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
719 {
720         u32 base_low = base & BEACON_TIME_MASK_LOW;
721         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
722         u32 interval = beacon_interval * TIME_UNIT;
723         u32 res = (base & BEACON_TIME_MASK_HIGH) +
724             (addon & BEACON_TIME_MASK_HIGH);
725
726         if (base_low > addon_low)
727                 res += base_low - addon_low;
728         else if (base_low < addon_low) {
729                 res += interval + base_low - addon_low;
730                 res += (1 << 24);
731         } else
732                 res += (1 << 24);
733
734         return cpu_to_le32(res);
735 }
736
737 static int iwl3945_get_measurement(struct iwl_priv *priv,
738                                struct ieee80211_measurement_params *params,
739                                u8 type)
740 {
741         struct iwl_spectrum_cmd spectrum;
742         struct iwl_rx_packet *pkt;
743         struct iwl_host_cmd cmd = {
744                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
745                 .data = (void *)&spectrum,
746                 .flags = CMD_WANT_SKB,
747         };
748         u32 add_time = le64_to_cpu(params->start_time);
749         int rc;
750         int spectrum_resp_status;
751         int duration = le16_to_cpu(params->duration);
752
753         if (iwl_is_associated(priv))
754                 add_time =
755                     iwl3945_usecs_to_beacons(
756                         le64_to_cpu(params->start_time) - priv->last_tsf,
757                         le16_to_cpu(priv->rxon_timing.beacon_interval));
758
759         memset(&spectrum, 0, sizeof(spectrum));
760
761         spectrum.channel_count = cpu_to_le16(1);
762         spectrum.flags =
763             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
764         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
765         cmd.len = sizeof(spectrum);
766         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
767
768         if (iwl_is_associated(priv))
769                 spectrum.start_time =
770                     iwl3945_add_beacon_time(priv->last_beacon_time,
771                                 add_time,
772                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
773         else
774                 spectrum.start_time = 0;
775
776         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
777         spectrum.channels[0].channel = params->channel;
778         spectrum.channels[0].type = type;
779         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
780                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
781                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
782
783         rc = iwl_send_cmd_sync(priv, &cmd);
784         if (rc)
785                 return rc;
786
787         pkt = (struct iwl_rx_packet *)cmd.reply_page;
788         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
789                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
790                 rc = -EIO;
791         }
792
793         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
794         switch (spectrum_resp_status) {
795         case 0:         /* Command will be handled */
796                 if (pkt->u.spectrum.id != 0xff) {
797                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
798                                                 pkt->u.spectrum.id);
799                         priv->measurement_status &= ~MEASUREMENT_READY;
800                 }
801                 priv->measurement_status |= MEASUREMENT_ACTIVE;
802                 rc = 0;
803                 break;
804
805         case 1:         /* Command will not be handled */
806                 rc = -EAGAIN;
807                 break;
808         }
809
810         iwl_free_pages(priv, cmd.reply_page);
811
812         return rc;
813 }
814
815 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
816                                struct iwl_rx_mem_buffer *rxb)
817 {
818         struct iwl_rx_packet *pkt = rxb_addr(rxb);
819         struct iwl_alive_resp *palive;
820         struct delayed_work *pwork;
821
822         palive = &pkt->u.alive_frame;
823
824         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
825                        "0x%01X 0x%01X\n",
826                        palive->is_valid, palive->ver_type,
827                        palive->ver_subtype);
828
829         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
830                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
831                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
832                        sizeof(struct iwl_alive_resp));
833                 pwork = &priv->init_alive_start;
834         } else {
835                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
836                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
837                        sizeof(struct iwl_alive_resp));
838                 pwork = &priv->alive_start;
839                 iwl3945_disable_events(priv);
840         }
841
842         /* We delay the ALIVE response by 5ms to
843          * give the HW RF Kill time to activate... */
844         if (palive->is_valid == UCODE_VALID_OK)
845                 queue_delayed_work(priv->workqueue, pwork,
846                                    msecs_to_jiffies(5));
847         else
848                 IWL_WARN(priv, "uCode did not respond OK.\n");
849 }
850
851 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
852                                  struct iwl_rx_mem_buffer *rxb)
853 {
854 #ifdef CONFIG_IWLWIFI_DEBUG
855         struct iwl_rx_packet *pkt = rxb_addr(rxb);
856 #endif
857
858         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
859         return;
860 }
861
862 static void iwl3945_bg_beacon_update(struct work_struct *work)
863 {
864         struct iwl_priv *priv =
865                 container_of(work, struct iwl_priv, beacon_update);
866         struct sk_buff *beacon;
867
868         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
869         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
870
871         if (!beacon) {
872                 IWL_ERR(priv, "update beacon failed\n");
873                 return;
874         }
875
876         mutex_lock(&priv->mutex);
877         /* new beacon skb is allocated every time; dispose previous.*/
878         if (priv->ibss_beacon)
879                 dev_kfree_skb(priv->ibss_beacon);
880
881         priv->ibss_beacon = beacon;
882         mutex_unlock(&priv->mutex);
883
884         iwl3945_send_beacon_cmd(priv);
885 }
886
887 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
888                                 struct iwl_rx_mem_buffer *rxb)
889 {
890 #ifdef CONFIG_IWLWIFI_DEBUG
891         struct iwl_rx_packet *pkt = rxb_addr(rxb);
892         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
893         u8 rate = beacon->beacon_notify_hdr.rate;
894
895         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
896                 "tsf %d %d rate %d\n",
897                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
898                 beacon->beacon_notify_hdr.failure_frame,
899                 le32_to_cpu(beacon->ibss_mgr_status),
900                 le32_to_cpu(beacon->high_tsf),
901                 le32_to_cpu(beacon->low_tsf), rate);
902 #endif
903
904         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
905             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
906                 queue_work(priv->workqueue, &priv->beacon_update);
907 }
908
909 /* Handle notification from uCode that card's power state is changing
910  * due to software, hardware, or critical temperature RFKILL */
911 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
912                                     struct iwl_rx_mem_buffer *rxb)
913 {
914         struct iwl_rx_packet *pkt = rxb_addr(rxb);
915         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
916         unsigned long status = priv->status;
917
918         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
919                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
920                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
921
922         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
923                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
924
925         if (flags & HW_CARD_DISABLED)
926                 set_bit(STATUS_RF_KILL_HW, &priv->status);
927         else
928                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
929
930
931         iwl_scan_cancel(priv);
932
933         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
934              test_bit(STATUS_RF_KILL_HW, &priv->status)))
935                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
936                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
937         else
938                 wake_up_interruptible(&priv->wait_command_queue);
939 }
940
941 /**
942  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
943  *
944  * Setup the RX handlers for each of the reply types sent from the uCode
945  * to the host.
946  *
947  * This function chains into the hardware specific files for them to setup
948  * any hardware specific handlers as well.
949  */
950 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
951 {
952         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
953         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
954         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
955         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
956         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
957                         iwl_rx_spectrum_measure_notif;
958         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
959         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
960             iwl_rx_pm_debug_statistics_notif;
961         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
962
963         /*
964          * The same handler is used for both the REPLY to a discrete
965          * statistics request from the host as well as for the periodic
966          * statistics notifications (after received beacons) from the uCode.
967          */
968         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
969         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
970
971         iwl_setup_rx_scan_handlers(priv);
972         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
973
974         /* Set up hardware specific Rx handlers */
975         iwl3945_hw_rx_handler_setup(priv);
976 }
977
978 /************************** RX-FUNCTIONS ****************************/
979 /*
980  * Rx theory of operation
981  *
982  * The host allocates 32 DMA target addresses and passes the host address
983  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
984  * 0 to 31
985  *
986  * Rx Queue Indexes
987  * The host/firmware share two index registers for managing the Rx buffers.
988  *
989  * The READ index maps to the first position that the firmware may be writing
990  * to -- the driver can read up to (but not including) this position and get
991  * good data.
992  * The READ index is managed by the firmware once the card is enabled.
993  *
994  * The WRITE index maps to the last position the driver has read from -- the
995  * position preceding WRITE is the last slot the firmware can place a packet.
996  *
997  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
998  * WRITE = READ.
999  *
1000  * During initialization, the host sets up the READ queue position to the first
1001  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1002  *
1003  * When the firmware places a packet in a buffer, it will advance the READ index
1004  * and fire the RX interrupt.  The driver can then query the READ index and
1005  * process as many packets as possible, moving the WRITE index forward as it
1006  * resets the Rx queue buffers with new memory.
1007  *
1008  * The management in the driver is as follows:
1009  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1010  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1011  *   to replenish the iwl->rxq->rx_free.
1012  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1013  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1014  *   'processed' and 'read' driver indexes as well)
1015  * + A received packet is processed and handed to the kernel network stack,
1016  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1017  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1018  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1019  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1020  *   were enough free buffers and RX_STALLED is set it is cleared.
1021  *
1022  *
1023  * Driver sequence:
1024  *
1025  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1026  *                            iwl3945_rx_queue_restock
1027  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1028  *                            queue, updates firmware pointers, and updates
1029  *                            the WRITE index.  If insufficient rx_free buffers
1030  *                            are available, schedules iwl3945_rx_replenish
1031  *
1032  * -- enable interrupts --
1033  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1034  *                            READ INDEX, detaching the SKB from the pool.
1035  *                            Moves the packet buffer from queue to rx_used.
1036  *                            Calls iwl3945_rx_queue_restock to refill any empty
1037  *                            slots.
1038  * ...
1039  *
1040  */
1041
1042 /**
1043  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1044  */
1045 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1046                                           dma_addr_t dma_addr)
1047 {
1048         return cpu_to_le32((u32)dma_addr);
1049 }
1050
1051 /**
1052  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1053  *
1054  * If there are slots in the RX queue that need to be restocked,
1055  * and we have free pre-allocated buffers, fill the ranks as much
1056  * as we can, pulling from rx_free.
1057  *
1058  * This moves the 'write' index forward to catch up with 'processed', and
1059  * also updates the memory address in the firmware to reference the new
1060  * target buffer.
1061  */
1062 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1063 {
1064         struct iwl_rx_queue *rxq = &priv->rxq;
1065         struct list_head *element;
1066         struct iwl_rx_mem_buffer *rxb;
1067         unsigned long flags;
1068         int write;
1069
1070         spin_lock_irqsave(&rxq->lock, flags);
1071         write = rxq->write & ~0x7;
1072         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1073                 /* Get next free Rx buffer, remove from free list */
1074                 element = rxq->rx_free.next;
1075                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1076                 list_del(element);
1077
1078                 /* Point to Rx buffer via next RBD in circular buffer */
1079                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1080                 rxq->queue[rxq->write] = rxb;
1081                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1082                 rxq->free_count--;
1083         }
1084         spin_unlock_irqrestore(&rxq->lock, flags);
1085         /* If the pre-allocated buffer pool is dropping low, schedule to
1086          * refill it */
1087         if (rxq->free_count <= RX_LOW_WATERMARK)
1088                 queue_work(priv->workqueue, &priv->rx_replenish);
1089
1090
1091         /* If we've added more space for the firmware to place data, tell it.
1092          * Increment device's write pointer in multiples of 8. */
1093         if ((rxq->write_actual != (rxq->write & ~0x7))
1094             || (abs(rxq->write - rxq->read) > 7)) {
1095                 spin_lock_irqsave(&rxq->lock, flags);
1096                 rxq->need_update = 1;
1097                 spin_unlock_irqrestore(&rxq->lock, flags);
1098                 iwl_rx_queue_update_write_ptr(priv, rxq);
1099         }
1100 }
1101
1102 /**
1103  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1104  *
1105  * When moving to rx_free an SKB is allocated for the slot.
1106  *
1107  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1108  * This is called as a scheduled work item (except for during initialization)
1109  */
1110 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1111 {
1112         struct iwl_rx_queue *rxq = &priv->rxq;
1113         struct list_head *element;
1114         struct iwl_rx_mem_buffer *rxb;
1115         struct page *page;
1116         unsigned long flags;
1117         gfp_t gfp_mask = priority;
1118
1119         while (1) {
1120                 spin_lock_irqsave(&rxq->lock, flags);
1121
1122                 if (list_empty(&rxq->rx_used)) {
1123                         spin_unlock_irqrestore(&rxq->lock, flags);
1124                         return;
1125                 }
1126                 spin_unlock_irqrestore(&rxq->lock, flags);
1127
1128                 if (rxq->free_count > RX_LOW_WATERMARK)
1129                         gfp_mask |= __GFP_NOWARN;
1130
1131                 if (priv->hw_params.rx_page_order > 0)
1132                         gfp_mask |= __GFP_COMP;
1133
1134                 /* Alloc a new receive buffer */
1135                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1136                 if (!page) {
1137                         if (net_ratelimit())
1138                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1139                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1140                             net_ratelimit())
1141                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1142                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1143                                          rxq->free_count);
1144                         /* We don't reschedule replenish work here -- we will
1145                          * call the restock method and if it still needs
1146                          * more buffers it will schedule replenish */
1147                         break;
1148                 }
1149
1150                 spin_lock_irqsave(&rxq->lock, flags);
1151                 if (list_empty(&rxq->rx_used)) {
1152                         spin_unlock_irqrestore(&rxq->lock, flags);
1153                         __free_pages(page, priv->hw_params.rx_page_order);
1154                         return;
1155                 }
1156                 element = rxq->rx_used.next;
1157                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1158                 list_del(element);
1159                 spin_unlock_irqrestore(&rxq->lock, flags);
1160
1161                 rxb->page = page;
1162                 /* Get physical address of RB/SKB */
1163                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1164                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1165                                 PCI_DMA_FROMDEVICE);
1166
1167                 spin_lock_irqsave(&rxq->lock, flags);
1168
1169                 list_add_tail(&rxb->list, &rxq->rx_free);
1170                 rxq->free_count++;
1171                 priv->alloc_rxb_page++;
1172
1173                 spin_unlock_irqrestore(&rxq->lock, flags);
1174         }
1175 }
1176
1177 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1178 {
1179         unsigned long flags;
1180         int i;
1181         spin_lock_irqsave(&rxq->lock, flags);
1182         INIT_LIST_HEAD(&rxq->rx_free);
1183         INIT_LIST_HEAD(&rxq->rx_used);
1184         /* Fill the rx_used queue with _all_ of the Rx buffers */
1185         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1186                 /* In the reset function, these buffers may have been allocated
1187                  * to an SKB, so we need to unmap and free potential storage */
1188                 if (rxq->pool[i].page != NULL) {
1189                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1190                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1191                                 PCI_DMA_FROMDEVICE);
1192                         __iwl_free_pages(priv, rxq->pool[i].page);
1193                         rxq->pool[i].page = NULL;
1194                 }
1195                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1196         }
1197
1198         /* Set us so that we have processed and used all buffers, but have
1199          * not restocked the Rx queue with fresh buffers */
1200         rxq->read = rxq->write = 0;
1201         rxq->write_actual = 0;
1202         rxq->free_count = 0;
1203         spin_unlock_irqrestore(&rxq->lock, flags);
1204 }
1205
1206 void iwl3945_rx_replenish(void *data)
1207 {
1208         struct iwl_priv *priv = data;
1209         unsigned long flags;
1210
1211         iwl3945_rx_allocate(priv, GFP_KERNEL);
1212
1213         spin_lock_irqsave(&priv->lock, flags);
1214         iwl3945_rx_queue_restock(priv);
1215         spin_unlock_irqrestore(&priv->lock, flags);
1216 }
1217
1218 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1219 {
1220         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1221
1222         iwl3945_rx_queue_restock(priv);
1223 }
1224
1225
1226 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1227  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1228  * This free routine walks the list of POOL entries and if SKB is set to
1229  * non NULL it is unmapped and freed
1230  */
1231 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1232 {
1233         int i;
1234         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1235                 if (rxq->pool[i].page != NULL) {
1236                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1237                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1238                                 PCI_DMA_FROMDEVICE);
1239                         __iwl_free_pages(priv, rxq->pool[i].page);
1240                         rxq->pool[i].page = NULL;
1241                 }
1242         }
1243
1244         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1245                           rxq->dma_addr);
1246         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1247                           rxq->rb_stts, rxq->rb_stts_dma);
1248         rxq->bd = NULL;
1249         rxq->rb_stts  = NULL;
1250 }
1251
1252
1253 /* Convert linear signal-to-noise ratio into dB */
1254 static u8 ratio2dB[100] = {
1255 /*       0   1   2   3   4   5   6   7   8   9 */
1256          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1257         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1258         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1259         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1260         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1261         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1262         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1263         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1264         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1265         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1266 };
1267
1268 /* Calculates a relative dB value from a ratio of linear
1269  *   (i.e. not dB) signal levels.
1270  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1271 int iwl3945_calc_db_from_ratio(int sig_ratio)
1272 {
1273         /* 1000:1 or higher just report as 60 dB */
1274         if (sig_ratio >= 1000)
1275                 return 60;
1276
1277         /* 100:1 or higher, divide by 10 and use table,
1278          *   add 20 dB to make up for divide by 10 */
1279         if (sig_ratio >= 100)
1280                 return 20 + (int)ratio2dB[sig_ratio/10];
1281
1282         /* We shouldn't see this */
1283         if (sig_ratio < 1)
1284                 return 0;
1285
1286         /* Use table for ratios 1:1 - 99:1 */
1287         return (int)ratio2dB[sig_ratio];
1288 }
1289
1290 /**
1291  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1292  *
1293  * Uses the priv->rx_handlers callback function array to invoke
1294  * the appropriate handlers, including command responses,
1295  * frame-received notifications, and other notifications.
1296  */
1297 static void iwl3945_rx_handle(struct iwl_priv *priv)
1298 {
1299         struct iwl_rx_mem_buffer *rxb;
1300         struct iwl_rx_packet *pkt;
1301         struct iwl_rx_queue *rxq = &priv->rxq;
1302         u32 r, i;
1303         int reclaim;
1304         unsigned long flags;
1305         u8 fill_rx = 0;
1306         u32 count = 8;
1307         int total_empty = 0;
1308
1309         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1310          * buffer that the driver may process (last buffer filled by ucode). */
1311         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1312         i = rxq->read;
1313
1314         /* calculate total frames need to be restock after handling RX */
1315         total_empty = r - rxq->write_actual;
1316         if (total_empty < 0)
1317                 total_empty += RX_QUEUE_SIZE;
1318
1319         if (total_empty > (RX_QUEUE_SIZE / 2))
1320                 fill_rx = 1;
1321         /* Rx interrupt, but nothing sent from uCode */
1322         if (i == r)
1323                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1324
1325         while (i != r) {
1326                 rxb = rxq->queue[i];
1327
1328                 /* If an RXB doesn't have a Rx queue slot associated with it,
1329                  * then a bug has been introduced in the queue refilling
1330                  * routines -- catch it here */
1331                 BUG_ON(rxb == NULL);
1332
1333                 rxq->queue[i] = NULL;
1334
1335                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1336                                PAGE_SIZE << priv->hw_params.rx_page_order,
1337                                PCI_DMA_FROMDEVICE);
1338                 pkt = rxb_addr(rxb);
1339
1340                 trace_iwlwifi_dev_rx(priv, pkt,
1341                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1342
1343                 /* Reclaim a command buffer only if this packet is a response
1344                  *   to a (driver-originated) command.
1345                  * If the packet (e.g. Rx frame) originated from uCode,
1346                  *   there is no command buffer to reclaim.
1347                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1348                  *   but apparently a few don't get set; catch them here. */
1349                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1350                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1351                         (pkt->hdr.cmd != REPLY_TX);
1352
1353                 /* Based on type of command response or notification,
1354                  *   handle those that need handling via function in
1355                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1356                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1357                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1358                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1359                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1360                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1361                 } else {
1362                         /* No handling needed */
1363                         IWL_DEBUG_RX(priv,
1364                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1365                                 r, i, get_cmd_string(pkt->hdr.cmd),
1366                                 pkt->hdr.cmd);
1367                 }
1368
1369                 /*
1370                  * XXX: After here, we should always check rxb->page
1371                  * against NULL before touching it or its virtual
1372                  * memory (pkt). Because some rx_handler might have
1373                  * already taken or freed the pages.
1374                  */
1375
1376                 if (reclaim) {
1377                         /* Invoke any callbacks, transfer the buffer to caller,
1378                          * and fire off the (possibly) blocking iwl_send_cmd()
1379                          * as we reclaim the driver command queue */
1380                         if (rxb->page)
1381                                 iwl_tx_cmd_complete(priv, rxb);
1382                         else
1383                                 IWL_WARN(priv, "Claim null rxb?\n");
1384                 }
1385
1386                 /* Reuse the page if possible. For notification packets and
1387                  * SKBs that fail to Rx correctly, add them back into the
1388                  * rx_free list for reuse later. */
1389                 spin_lock_irqsave(&rxq->lock, flags);
1390                 if (rxb->page != NULL) {
1391                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1392                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1393                                 PCI_DMA_FROMDEVICE);
1394                         list_add_tail(&rxb->list, &rxq->rx_free);
1395                         rxq->free_count++;
1396                 } else
1397                         list_add_tail(&rxb->list, &rxq->rx_used);
1398
1399                 spin_unlock_irqrestore(&rxq->lock, flags);
1400
1401                 i = (i + 1) & RX_QUEUE_MASK;
1402                 /* If there are a lot of unused frames,
1403                  * restock the Rx queue so ucode won't assert. */
1404                 if (fill_rx) {
1405                         count++;
1406                         if (count >= 8) {
1407                                 rxq->read = i;
1408                                 iwl3945_rx_replenish_now(priv);
1409                                 count = 0;
1410                         }
1411                 }
1412         }
1413
1414         /* Backtrack one entry */
1415         rxq->read = i;
1416         if (fill_rx)
1417                 iwl3945_rx_replenish_now(priv);
1418         else
1419                 iwl3945_rx_queue_restock(priv);
1420 }
1421
1422 /* call this function to flush any scheduled tasklet */
1423 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1424 {
1425         /* wait to make sure we flush pending tasklet*/
1426         synchronize_irq(priv->pci_dev->irq);
1427         tasklet_kill(&priv->irq_tasklet);
1428 }
1429
1430 static const char *desc_lookup(int i)
1431 {
1432         switch (i) {
1433         case 1:
1434                 return "FAIL";
1435         case 2:
1436                 return "BAD_PARAM";
1437         case 3:
1438                 return "BAD_CHECKSUM";
1439         case 4:
1440                 return "NMI_INTERRUPT";
1441         case 5:
1442                 return "SYSASSERT";
1443         case 6:
1444                 return "FATAL_ERROR";
1445         }
1446
1447         return "UNKNOWN";
1448 }
1449
1450 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1451 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1452
1453 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1454 {
1455         u32 i;
1456         u32 desc, time, count, base, data1;
1457         u32 blink1, blink2, ilink1, ilink2;
1458
1459         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1460
1461         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1462                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1463                 return;
1464         }
1465
1466
1467         count = iwl_read_targ_mem(priv, base);
1468
1469         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1470                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1471                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1472                         priv->status, count);
1473         }
1474
1475         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1476                   "ilink1  nmiPC   Line\n");
1477         for (i = ERROR_START_OFFSET;
1478              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1479              i += ERROR_ELEM_SIZE) {
1480                 desc = iwl_read_targ_mem(priv, base + i);
1481                 time =
1482                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1483                 blink1 =
1484                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1485                 blink2 =
1486                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1487                 ilink1 =
1488                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1489                 ilink2 =
1490                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1491                 data1 =
1492                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1493
1494                 IWL_ERR(priv,
1495                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1496                         desc_lookup(desc), desc, time, blink1, blink2,
1497                         ilink1, ilink2, data1);
1498                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1499                                         0, blink1, blink2, ilink1, ilink2);
1500         }
1501 }
1502
1503 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1504
1505 /**
1506  * iwl3945_print_event_log - Dump error event log to syslog
1507  *
1508  */
1509 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1510                                   u32 num_events, u32 mode,
1511                                   int pos, char **buf, size_t bufsz)
1512 {
1513         u32 i;
1514         u32 base;       /* SRAM byte address of event log header */
1515         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1516         u32 ptr;        /* SRAM byte address of log data */
1517         u32 ev, time, data; /* event log data */
1518         unsigned long reg_flags;
1519
1520         if (num_events == 0)
1521                 return pos;
1522
1523         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1524
1525         if (mode == 0)
1526                 event_size = 2 * sizeof(u32);
1527         else
1528                 event_size = 3 * sizeof(u32);
1529
1530         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1531
1532         /* Make sure device is powered up for SRAM reads */
1533         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1534         iwl_grab_nic_access(priv);
1535
1536         /* Set starting address; reads will auto-increment */
1537         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1538         rmb();
1539
1540         /* "time" is actually "data" for mode 0 (no timestamp).
1541          * place event id # at far right for easier visual parsing. */
1542         for (i = 0; i < num_events; i++) {
1543                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1544                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1545                 if (mode == 0) {
1546                         /* data, ev */
1547                         if (bufsz) {
1548                                 pos += scnprintf(*buf + pos, bufsz - pos,
1549                                                 "0x%08x:%04u\n",
1550                                                 time, ev);
1551                         } else {
1552                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1553                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1554                                                               time, ev);
1555                         }
1556                 } else {
1557                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1558                         if (bufsz) {
1559                                 pos += scnprintf(*buf + pos, bufsz - pos,
1560                                                 "%010u:0x%08x:%04u\n",
1561                                                  time, data, ev);
1562                         } else {
1563                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1564                                         time, data, ev);
1565                                 trace_iwlwifi_dev_ucode_event(priv, time,
1566                                                               data, ev);
1567                         }
1568                 }
1569         }
1570
1571         /* Allow device to power down */
1572         iwl_release_nic_access(priv);
1573         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1574         return pos;
1575 }
1576
1577 /**
1578  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1579  */
1580 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1581                                       u32 num_wraps, u32 next_entry,
1582                                       u32 size, u32 mode,
1583                                       int pos, char **buf, size_t bufsz)
1584 {
1585         /*
1586          * display the newest DEFAULT_LOG_ENTRIES entries
1587          * i.e the entries just before the next ont that uCode would fill.
1588          */
1589         if (num_wraps) {
1590                 if (next_entry < size) {
1591                         pos = iwl3945_print_event_log(priv,
1592                                              capacity - (size - next_entry),
1593                                              size - next_entry, mode,
1594                                              pos, buf, bufsz);
1595                         pos = iwl3945_print_event_log(priv, 0,
1596                                                       next_entry, mode,
1597                                                       pos, buf, bufsz);
1598                 } else
1599                         pos = iwl3945_print_event_log(priv, next_entry - size,
1600                                                       size, mode,
1601                                                       pos, buf, bufsz);
1602         } else {
1603                 if (next_entry < size)
1604                         pos = iwl3945_print_event_log(priv, 0,
1605                                                       next_entry, mode,
1606                                                       pos, buf, bufsz);
1607                 else
1608                         pos = iwl3945_print_event_log(priv, next_entry - size,
1609                                                       size, mode,
1610                                                       pos, buf, bufsz);
1611         }
1612         return pos;
1613 }
1614
1615 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1616 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1617
1618 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1619
1620 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1621                             char **buf, bool display)
1622 {
1623         u32 base;       /* SRAM byte address of event log header */
1624         u32 capacity;   /* event log capacity in # entries */
1625         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1626         u32 num_wraps;  /* # times uCode wrapped to top of log */
1627         u32 next_entry; /* index of next entry to be written by uCode */
1628         u32 size;       /* # entries that we'll print */
1629         int pos = 0;
1630         size_t bufsz = 0;
1631
1632         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1633         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1634                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1635                 return  -EINVAL;
1636         }
1637
1638         /* event log header */
1639         capacity = iwl_read_targ_mem(priv, base);
1640         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1641         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1642         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1643
1644         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1645                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1646                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1647                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1648         }
1649
1650         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1651                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1652                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1653                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1654         }
1655
1656         size = num_wraps ? capacity : next_entry;
1657
1658         /* bail out if nothing in log */
1659         if (size == 0) {
1660                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1661                 return pos;
1662         }
1663
1664 #ifdef CONFIG_IWLWIFI_DEBUG
1665         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1666                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1667                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1668 #else
1669         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1670                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1671 #endif
1672
1673         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1674                   size);
1675
1676 #ifdef CONFIG_IWLWIFI_DEBUG
1677         if (display) {
1678                 if (full_log)
1679                         bufsz = capacity * 48;
1680                 else
1681                         bufsz = size * 48;
1682                 *buf = kmalloc(bufsz, GFP_KERNEL);
1683                 if (!*buf)
1684                         return -ENOMEM;
1685         }
1686         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1687                 /* if uCode has wrapped back to top of log,
1688                  * start at the oldest entry,
1689                  * i.e the next one that uCode would fill.
1690                  */
1691                 if (num_wraps)
1692                         pos = iwl3945_print_event_log(priv, next_entry,
1693                                                 capacity - next_entry, mode,
1694                                                 pos, buf, bufsz);
1695
1696                 /* (then/else) start at top of log */
1697                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1698                                               pos, buf, bufsz);
1699         } else
1700                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1701                                                     next_entry, size, mode,
1702                                                     pos, buf, bufsz);
1703 #else
1704         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1705                                             next_entry, size, mode,
1706                                             pos, buf, bufsz);
1707 #endif
1708         return pos;
1709 }
1710
1711 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1712 {
1713         u32 inta, handled = 0;
1714         u32 inta_fh;
1715         unsigned long flags;
1716 #ifdef CONFIG_IWLWIFI_DEBUG
1717         u32 inta_mask;
1718 #endif
1719
1720         spin_lock_irqsave(&priv->lock, flags);
1721
1722         /* Ack/clear/reset pending uCode interrupts.
1723          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1724          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1725         inta = iwl_read32(priv, CSR_INT);
1726         iwl_write32(priv, CSR_INT, inta);
1727
1728         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1729          * Any new interrupts that happen after this, either while we're
1730          * in this tasklet, or later, will show up in next ISR/tasklet. */
1731         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1732         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1733
1734 #ifdef CONFIG_IWLWIFI_DEBUG
1735         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1736                 /* just for debug */
1737                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1738                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1739                               inta, inta_mask, inta_fh);
1740         }
1741 #endif
1742
1743         spin_unlock_irqrestore(&priv->lock, flags);
1744
1745         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1746          * atomic, make sure that inta covers all the interrupts that
1747          * we've discovered, even if FH interrupt came in just after
1748          * reading CSR_INT. */
1749         if (inta_fh & CSR39_FH_INT_RX_MASK)
1750                 inta |= CSR_INT_BIT_FH_RX;
1751         if (inta_fh & CSR39_FH_INT_TX_MASK)
1752                 inta |= CSR_INT_BIT_FH_TX;
1753
1754         /* Now service all interrupt bits discovered above. */
1755         if (inta & CSR_INT_BIT_HW_ERR) {
1756                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1757
1758                 /* Tell the device to stop sending interrupts */
1759                 iwl_disable_interrupts(priv);
1760
1761                 priv->isr_stats.hw++;
1762                 iwl_irq_handle_error(priv);
1763
1764                 handled |= CSR_INT_BIT_HW_ERR;
1765
1766                 return;
1767         }
1768
1769 #ifdef CONFIG_IWLWIFI_DEBUG
1770         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1771                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1772                 if (inta & CSR_INT_BIT_SCD) {
1773                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1774                                       "the frame/frames.\n");
1775                         priv->isr_stats.sch++;
1776                 }
1777
1778                 /* Alive notification via Rx interrupt will do the real work */
1779                 if (inta & CSR_INT_BIT_ALIVE) {
1780                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1781                         priv->isr_stats.alive++;
1782                 }
1783         }
1784 #endif
1785         /* Safely ignore these bits for debug checks below */
1786         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1787
1788         /* Error detected by uCode */
1789         if (inta & CSR_INT_BIT_SW_ERR) {
1790                 IWL_ERR(priv, "Microcode SW error detected. "
1791                         "Restarting 0x%X.\n", inta);
1792                 priv->isr_stats.sw++;
1793                 priv->isr_stats.sw_err = inta;
1794                 iwl_irq_handle_error(priv);
1795                 handled |= CSR_INT_BIT_SW_ERR;
1796         }
1797
1798         /* uCode wakes up after power-down sleep */
1799         if (inta & CSR_INT_BIT_WAKEUP) {
1800                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1801                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1802                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1803                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1804                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1805                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1806                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1807                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1808
1809                 priv->isr_stats.wakeup++;
1810                 handled |= CSR_INT_BIT_WAKEUP;
1811         }
1812
1813         /* All uCode command responses, including Tx command responses,
1814          * Rx "responses" (frame-received notification), and other
1815          * notifications from uCode come through here*/
1816         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1817                 iwl3945_rx_handle(priv);
1818                 priv->isr_stats.rx++;
1819                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1820         }
1821
1822         if (inta & CSR_INT_BIT_FH_TX) {
1823                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1824                 priv->isr_stats.tx++;
1825
1826                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1827                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1828                                         (FH39_SRVC_CHNL), 0x0);
1829                 handled |= CSR_INT_BIT_FH_TX;
1830         }
1831
1832         if (inta & ~handled) {
1833                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1834                 priv->isr_stats.unhandled++;
1835         }
1836
1837         if (inta & ~priv->inta_mask) {
1838                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1839                          inta & ~priv->inta_mask);
1840                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1841         }
1842
1843         /* Re-enable all interrupts */
1844         /* only Re-enable if disabled by irq */
1845         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1846                 iwl_enable_interrupts(priv);
1847
1848 #ifdef CONFIG_IWLWIFI_DEBUG
1849         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1850                 inta = iwl_read32(priv, CSR_INT);
1851                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1852                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1853                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1854                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1855         }
1856 #endif
1857 }
1858
1859 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1860                                          enum ieee80211_band band,
1861                                      u8 is_active, u8 n_probes,
1862                                      struct iwl3945_scan_channel *scan_ch)
1863 {
1864         struct ieee80211_channel *chan;
1865         const struct ieee80211_supported_band *sband;
1866         const struct iwl_channel_info *ch_info;
1867         u16 passive_dwell = 0;
1868         u16 active_dwell = 0;
1869         int added, i;
1870
1871         sband = iwl_get_hw_mode(priv, band);
1872         if (!sband)
1873                 return 0;
1874
1875         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1876         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1877
1878         if (passive_dwell <= active_dwell)
1879                 passive_dwell = active_dwell + 1;
1880
1881         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1882                 chan = priv->scan_request->channels[i];
1883
1884                 if (chan->band != band)
1885                         continue;
1886
1887                 scan_ch->channel = chan->hw_value;
1888
1889                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1890                 if (!is_channel_valid(ch_info)) {
1891                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1892                                        scan_ch->channel);
1893                         continue;
1894                 }
1895
1896                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1897                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1898                 /* If passive , set up for auto-switch
1899                  *  and use long active_dwell time.
1900                  */
1901                 if (!is_active || is_channel_passive(ch_info) ||
1902                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1903                         scan_ch->type = 0;      /* passive */
1904                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1905                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1906                 } else {
1907                         scan_ch->type = 1;      /* active */
1908                 }
1909
1910                 /* Set direct probe bits. These may be used both for active
1911                  * scan channels (probes gets sent right away),
1912                  * or for passive channels (probes get se sent only after
1913                  * hearing clear Rx packet).*/
1914                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1915                         if (n_probes)
1916                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1917                 } else {
1918                         /* uCode v1 does not allow setting direct probe bits on
1919                          * passive channel. */
1920                         if ((scan_ch->type & 1) && n_probes)
1921                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1922                 }
1923
1924                 /* Set txpower levels to defaults */
1925                 scan_ch->tpc.dsp_atten = 110;
1926                 /* scan_pwr_info->tpc.dsp_atten; */
1927
1928                 /*scan_pwr_info->tpc.tx_gain; */
1929                 if (band == IEEE80211_BAND_5GHZ)
1930                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1931                 else {
1932                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1933                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1934                          * power level:
1935                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1936                          */
1937                 }
1938
1939                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1940                                scan_ch->channel,
1941                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1942                                (scan_ch->type & 1) ?
1943                                active_dwell : passive_dwell);
1944
1945                 scan_ch++;
1946                 added++;
1947         }
1948
1949         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1950         return added;
1951 }
1952
1953 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1954                               struct ieee80211_rate *rates)
1955 {
1956         int i;
1957
1958         for (i = 0; i < IWL_RATE_COUNT; i++) {
1959                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1960                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1961                 rates[i].hw_value_short = i;
1962                 rates[i].flags = 0;
1963                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1964                         /*
1965                          * If CCK != 1M then set short preamble rate flag.
1966                          */
1967                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1968                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1969                 }
1970         }
1971 }
1972
1973 /******************************************************************************
1974  *
1975  * uCode download functions
1976  *
1977  ******************************************************************************/
1978
1979 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1980 {
1981         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1982         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1983         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1984         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1985         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1986         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1987 }
1988
1989 /**
1990  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1991  *     looking at all data.
1992  */
1993 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1994 {
1995         u32 val;
1996         u32 save_len = len;
1997         int rc = 0;
1998         u32 errcnt;
1999
2000         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2001
2002         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2003                                IWL39_RTC_INST_LOWER_BOUND);
2004
2005         errcnt = 0;
2006         for (; len > 0; len -= sizeof(u32), image++) {
2007                 /* read data comes through single port, auto-incr addr */
2008                 /* NOTE: Use the debugless read so we don't flood kernel log
2009                  * if IWL_DL_IO is set */
2010                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2011                 if (val != le32_to_cpu(*image)) {
2012                         IWL_ERR(priv, "uCode INST section is invalid at "
2013                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2014                                   save_len - len, val, le32_to_cpu(*image));
2015                         rc = -EIO;
2016                         errcnt++;
2017                         if (errcnt >= 20)
2018                                 break;
2019                 }
2020         }
2021
2022
2023         if (!errcnt)
2024                 IWL_DEBUG_INFO(priv,
2025                         "ucode image in INSTRUCTION memory is good\n");
2026
2027         return rc;
2028 }
2029
2030
2031 /**
2032  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2033  *   using sample data 100 bytes apart.  If these sample points are good,
2034  *   it's a pretty good bet that everything between them is good, too.
2035  */
2036 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2037 {
2038         u32 val;
2039         int rc = 0;
2040         u32 errcnt = 0;
2041         u32 i;
2042
2043         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2044
2045         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2046                 /* read data comes through single port, auto-incr addr */
2047                 /* NOTE: Use the debugless read so we don't flood kernel log
2048                  * if IWL_DL_IO is set */
2049                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2050                         i + IWL39_RTC_INST_LOWER_BOUND);
2051                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2052                 if (val != le32_to_cpu(*image)) {
2053 #if 0 /* Enable this if you want to see details */
2054                         IWL_ERR(priv, "uCode INST section is invalid at "
2055                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2056                                   i, val, *image);
2057 #endif
2058                         rc = -EIO;
2059                         errcnt++;
2060                         if (errcnt >= 3)
2061                                 break;
2062                 }
2063         }
2064
2065         return rc;
2066 }
2067
2068
2069 /**
2070  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2071  *    and verify its contents
2072  */
2073 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2074 {
2075         __le32 *image;
2076         u32 len;
2077         int rc = 0;
2078
2079         /* Try bootstrap */
2080         image = (__le32 *)priv->ucode_boot.v_addr;
2081         len = priv->ucode_boot.len;
2082         rc = iwl3945_verify_inst_sparse(priv, image, len);
2083         if (rc == 0) {
2084                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2085                 return 0;
2086         }
2087
2088         /* Try initialize */
2089         image = (__le32 *)priv->ucode_init.v_addr;
2090         len = priv->ucode_init.len;
2091         rc = iwl3945_verify_inst_sparse(priv, image, len);
2092         if (rc == 0) {
2093                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2094                 return 0;
2095         }
2096
2097         /* Try runtime/protocol */
2098         image = (__le32 *)priv->ucode_code.v_addr;
2099         len = priv->ucode_code.len;
2100         rc = iwl3945_verify_inst_sparse(priv, image, len);
2101         if (rc == 0) {
2102                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2103                 return 0;
2104         }
2105
2106         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2107
2108         /* Since nothing seems to match, show first several data entries in
2109          * instruction SRAM, so maybe visual inspection will give a clue.
2110          * Selection of bootstrap image (vs. other images) is arbitrary. */
2111         image = (__le32 *)priv->ucode_boot.v_addr;
2112         len = priv->ucode_boot.len;
2113         rc = iwl3945_verify_inst_full(priv, image, len);
2114
2115         return rc;
2116 }
2117
2118 static void iwl3945_nic_start(struct iwl_priv *priv)
2119 {
2120         /* Remove all resets to allow NIC to operate */
2121         iwl_write32(priv, CSR_RESET, 0);
2122 }
2123
2124 /**
2125  * iwl3945_read_ucode - Read uCode images from disk file.
2126  *
2127  * Copy into buffers for card to fetch via bus-mastering
2128  */
2129 static int iwl3945_read_ucode(struct iwl_priv *priv)
2130 {
2131         const struct iwl_ucode_header *ucode;
2132         int ret = -EINVAL, index;
2133         const struct firmware *ucode_raw;
2134         /* firmware file name contains uCode/driver compatibility version */
2135         const char *name_pre = priv->cfg->fw_name_pre;
2136         const unsigned int api_max = priv->cfg->ucode_api_max;
2137         const unsigned int api_min = priv->cfg->ucode_api_min;
2138         char buf[25];
2139         u8 *src;
2140         size_t len;
2141         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2142
2143         /* Ask kernel firmware_class module to get the boot firmware off disk.
2144          * request_firmware() is synchronous, file is in memory on return. */
2145         for (index = api_max; index >= api_min; index--) {
2146                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2147                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2148                 if (ret < 0) {
2149                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2150                                   buf, ret);
2151                         if (ret == -ENOENT)
2152                                 continue;
2153                         else
2154                                 goto error;
2155                 } else {
2156                         if (index < api_max)
2157                                 IWL_ERR(priv, "Loaded firmware %s, "
2158                                         "which is deprecated. "
2159                                         " Please use API v%u instead.\n",
2160                                           buf, api_max);
2161                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2162                                        "(%zd bytes) from disk\n",
2163                                        buf, ucode_raw->size);
2164                         break;
2165                 }
2166         }
2167
2168         if (ret < 0)
2169                 goto error;
2170
2171         /* Make sure that we got at least our header! */
2172         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2173                 IWL_ERR(priv, "File size way too small!\n");
2174                 ret = -EINVAL;
2175                 goto err_release;
2176         }
2177
2178         /* Data from ucode file:  header followed by uCode images */
2179         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2180
2181         priv->ucode_ver = le32_to_cpu(ucode->ver);
2182         api_ver = IWL_UCODE_API(priv->ucode_ver);
2183         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2184         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2185         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2186         init_data_size =
2187                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2188         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2189         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2190
2191         /* api_ver should match the api version forming part of the
2192          * firmware filename ... but we don't check for that and only rely
2193          * on the API version read from firmware header from here on forward */
2194
2195         if (api_ver < api_min || api_ver > api_max) {
2196                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2197                           "Driver supports v%u, firmware is v%u.\n",
2198                           api_max, api_ver);
2199                 priv->ucode_ver = 0;
2200                 ret = -EINVAL;
2201                 goto err_release;
2202         }
2203         if (api_ver != api_max)
2204                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2205                           "got %u. New firmware can be obtained "
2206                           "from http://www.intellinuxwireless.org.\n",
2207                           api_max, api_ver);
2208
2209         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2210                 IWL_UCODE_MAJOR(priv->ucode_ver),
2211                 IWL_UCODE_MINOR(priv->ucode_ver),
2212                 IWL_UCODE_API(priv->ucode_ver),
2213                 IWL_UCODE_SERIAL(priv->ucode_ver));
2214
2215         snprintf(priv->hw->wiphy->fw_version,
2216                  sizeof(priv->hw->wiphy->fw_version),
2217                  "%u.%u.%u.%u",
2218                  IWL_UCODE_MAJOR(priv->ucode_ver),
2219                  IWL_UCODE_MINOR(priv->ucode_ver),
2220                  IWL_UCODE_API(priv->ucode_ver),
2221                  IWL_UCODE_SERIAL(priv->ucode_ver));
2222
2223         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2224                        priv->ucode_ver);
2225         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2226                        inst_size);
2227         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2228                        data_size);
2229         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2230                        init_size);
2231         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2232                        init_data_size);
2233         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2234                        boot_size);
2235
2236
2237         /* Verify size of file vs. image size info in file's header */
2238         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2239                 inst_size + data_size + init_size +
2240                 init_data_size + boot_size) {
2241
2242                 IWL_DEBUG_INFO(priv,
2243                         "uCode file size %zd does not match expected size\n",
2244                         ucode_raw->size);
2245                 ret = -EINVAL;
2246                 goto err_release;
2247         }
2248
2249         /* Verify that uCode images will fit in card's SRAM */
2250         if (inst_size > IWL39_MAX_INST_SIZE) {
2251                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2252                                inst_size);
2253                 ret = -EINVAL;
2254                 goto err_release;
2255         }
2256
2257         if (data_size > IWL39_MAX_DATA_SIZE) {
2258                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2259                                data_size);
2260                 ret = -EINVAL;
2261                 goto err_release;
2262         }
2263         if (init_size > IWL39_MAX_INST_SIZE) {
2264                 IWL_DEBUG_INFO(priv,
2265                                 "uCode init instr len %d too large to fit in\n",
2266                                 init_size);
2267                 ret = -EINVAL;
2268                 goto err_release;
2269         }
2270         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2271                 IWL_DEBUG_INFO(priv,
2272                                 "uCode init data len %d too large to fit in\n",
2273                                 init_data_size);
2274                 ret = -EINVAL;
2275                 goto err_release;
2276         }
2277         if (boot_size > IWL39_MAX_BSM_SIZE) {
2278                 IWL_DEBUG_INFO(priv,
2279                                 "uCode boot instr len %d too large to fit in\n",
2280                                 boot_size);
2281                 ret = -EINVAL;
2282                 goto err_release;
2283         }
2284
2285         /* Allocate ucode buffers for card's bus-master loading ... */
2286
2287         /* Runtime instructions and 2 copies of data:
2288          * 1) unmodified from disk
2289          * 2) backup cache for save/restore during power-downs */
2290         priv->ucode_code.len = inst_size;
2291         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2292
2293         priv->ucode_data.len = data_size;
2294         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2295
2296         priv->ucode_data_backup.len = data_size;
2297         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2298
2299         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2300             !priv->ucode_data_backup.v_addr)
2301                 goto err_pci_alloc;
2302
2303         /* Initialization instructions and data */
2304         if (init_size && init_data_size) {
2305                 priv->ucode_init.len = init_size;
2306                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2307
2308                 priv->ucode_init_data.len = init_data_size;
2309                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2310
2311                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2312                         goto err_pci_alloc;
2313         }
2314
2315         /* Bootstrap (instructions only, no data) */
2316         if (boot_size) {
2317                 priv->ucode_boot.len = boot_size;
2318                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2319
2320                 if (!priv->ucode_boot.v_addr)
2321                         goto err_pci_alloc;
2322         }
2323
2324         /* Copy images into buffers for card's bus-master reads ... */
2325
2326         /* Runtime instructions (first block of data in file) */
2327         len = inst_size;
2328         IWL_DEBUG_INFO(priv,
2329                 "Copying (but not loading) uCode instr len %zd\n", len);
2330         memcpy(priv->ucode_code.v_addr, src, len);
2331         src += len;
2332
2333         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2334                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2335
2336         /* Runtime data (2nd block)
2337          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2338         len = data_size;
2339         IWL_DEBUG_INFO(priv,
2340                 "Copying (but not loading) uCode data len %zd\n", len);
2341         memcpy(priv->ucode_data.v_addr, src, len);
2342         memcpy(priv->ucode_data_backup.v_addr, src, len);
2343         src += len;
2344
2345         /* Initialization instructions (3rd block) */
2346         if (init_size) {
2347                 len = init_size;
2348                 IWL_DEBUG_INFO(priv,
2349                         "Copying (but not loading) init instr len %zd\n", len);
2350                 memcpy(priv->ucode_init.v_addr, src, len);
2351                 src += len;
2352         }
2353
2354         /* Initialization data (4th block) */
2355         if (init_data_size) {
2356                 len = init_data_size;
2357                 IWL_DEBUG_INFO(priv,
2358                         "Copying (but not loading) init data len %zd\n", len);
2359                 memcpy(priv->ucode_init_data.v_addr, src, len);
2360                 src += len;
2361         }
2362
2363         /* Bootstrap instructions (5th block) */
2364         len = boot_size;
2365         IWL_DEBUG_INFO(priv,
2366                 "Copying (but not loading) boot instr len %zd\n", len);
2367         memcpy(priv->ucode_boot.v_addr, src, len);
2368
2369         /* We have our copies now, allow OS release its copies */
2370         release_firmware(ucode_raw);
2371         return 0;
2372
2373  err_pci_alloc:
2374         IWL_ERR(priv, "failed to allocate pci memory\n");
2375         ret = -ENOMEM;
2376         iwl3945_dealloc_ucode_pci(priv);
2377
2378  err_release:
2379         release_firmware(ucode_raw);
2380
2381  error:
2382         return ret;
2383 }
2384
2385
2386 /**
2387  * iwl3945_set_ucode_ptrs - Set uCode address location
2388  *
2389  * Tell initialization uCode where to find runtime uCode.
2390  *
2391  * BSM registers initially contain pointers to initialization uCode.
2392  * We need to replace them to load runtime uCode inst and data,
2393  * and to save runtime data when powering down.
2394  */
2395 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2396 {
2397         dma_addr_t pinst;
2398         dma_addr_t pdata;
2399
2400         /* bits 31:0 for 3945 */
2401         pinst = priv->ucode_code.p_addr;
2402         pdata = priv->ucode_data_backup.p_addr;
2403
2404         /* Tell bootstrap uCode where to find image to load */
2405         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2406         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2407         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2408                                  priv->ucode_data.len);
2409
2410         /* Inst byte count must be last to set up, bit 31 signals uCode
2411          *   that all new ptr/size info is in place */
2412         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2413                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2414
2415         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2416
2417         return 0;
2418 }
2419
2420 /**
2421  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2422  *
2423  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2424  *
2425  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2426  */
2427 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2428 {
2429         /* Check alive response for "valid" sign from uCode */
2430         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2431                 /* We had an error bringing up the hardware, so take it
2432                  * all the way back down so we can try again */
2433                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2434                 goto restart;
2435         }
2436
2437         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2438          * This is a paranoid check, because we would not have gotten the
2439          * "initialize" alive if code weren't properly loaded.  */
2440         if (iwl3945_verify_ucode(priv)) {
2441                 /* Runtime instruction load was bad;
2442                  * take it all the way back down so we can try again */
2443                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2444                 goto restart;
2445         }
2446
2447         /* Send pointers to protocol/runtime uCode image ... init code will
2448          * load and launch runtime uCode, which will send us another "Alive"
2449          * notification. */
2450         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2451         if (iwl3945_set_ucode_ptrs(priv)) {
2452                 /* Runtime instruction load won't happen;
2453                  * take it all the way back down so we can try again */
2454                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2455                 goto restart;
2456         }
2457         return;
2458
2459  restart:
2460         queue_work(priv->workqueue, &priv->restart);
2461 }
2462
2463 /**
2464  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2465  *                   from protocol/runtime uCode (initialization uCode's
2466  *                   Alive gets handled by iwl3945_init_alive_start()).
2467  */
2468 static void iwl3945_alive_start(struct iwl_priv *priv)
2469 {
2470         int thermal_spin = 0;
2471         u32 rfkill;
2472
2473         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2474
2475         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2476                 /* We had an error bringing up the hardware, so take it
2477                  * all the way back down so we can try again */
2478                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2479                 goto restart;
2480         }
2481
2482         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2483          * This is a paranoid check, because we would not have gotten the
2484          * "runtime" alive if code weren't properly loaded.  */
2485         if (iwl3945_verify_ucode(priv)) {
2486                 /* Runtime instruction load was bad;
2487                  * take it all the way back down so we can try again */
2488                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2489                 goto restart;
2490         }
2491
2492         iwl_clear_stations_table(priv);
2493
2494         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2495         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2496
2497         if (rfkill & 0x1) {
2498                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2499                 /* if RFKILL is not on, then wait for thermal
2500                  * sensor in adapter to kick in */
2501                 while (iwl3945_hw_get_temperature(priv) == 0) {
2502                         thermal_spin++;
2503                         udelay(10);
2504                 }
2505
2506                 if (thermal_spin)
2507                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2508                                        thermal_spin * 10);
2509         } else
2510                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2511
2512         /* After the ALIVE response, we can send commands to 3945 uCode */
2513         set_bit(STATUS_ALIVE, &priv->status);
2514
2515         if (iwl_is_rfkill(priv))
2516                 return;
2517
2518         ieee80211_wake_queues(priv->hw);
2519
2520         priv->active_rate = priv->rates_mask;
2521         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2522
2523         iwl_power_update_mode(priv, true);
2524
2525         if (iwl_is_associated(priv)) {
2526                 struct iwl3945_rxon_cmd *active_rxon =
2527                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2528
2529                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2530                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2531         } else {
2532                 /* Initialize our rx_config data */
2533                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2534         }
2535
2536         /* Configure Bluetooth device coexistence support */
2537         iwl_send_bt_config(priv);
2538
2539         /* Configure the adapter for unassociated operation */
2540         iwlcore_commit_rxon(priv);
2541
2542         iwl3945_reg_txpower_periodic(priv);
2543
2544         iwl_leds_init(priv);
2545
2546         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2547         set_bit(STATUS_READY, &priv->status);
2548         wake_up_interruptible(&priv->wait_command_queue);
2549
2550         /* reassociate for ADHOC mode */
2551         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2552                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2553                                                                 priv->vif);
2554                 if (beacon)
2555                         iwl_mac_beacon_update(priv->hw, beacon);
2556         }
2557
2558         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2559                 iwl_set_mode(priv, priv->iw_mode);
2560
2561         return;
2562
2563  restart:
2564         queue_work(priv->workqueue, &priv->restart);
2565 }
2566
2567 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2568
2569 static void __iwl3945_down(struct iwl_priv *priv)
2570 {
2571         unsigned long flags;
2572         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2573         struct ieee80211_conf *conf = NULL;
2574
2575         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2576
2577         conf = ieee80211_get_hw_conf(priv->hw);
2578
2579         if (!exit_pending)
2580                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2581
2582         iwl_clear_stations_table(priv);
2583
2584         /* Unblock any waiting calls */
2585         wake_up_interruptible_all(&priv->wait_command_queue);
2586
2587         /* Wipe out the EXIT_PENDING status bit if we are not actually
2588          * exiting the module */
2589         if (!exit_pending)
2590                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2591
2592         /* stop and reset the on-board processor */
2593         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2594
2595         /* tell the device to stop sending interrupts */
2596         spin_lock_irqsave(&priv->lock, flags);
2597         iwl_disable_interrupts(priv);
2598         spin_unlock_irqrestore(&priv->lock, flags);
2599         iwl_synchronize_irq(priv);
2600
2601         if (priv->mac80211_registered)
2602                 ieee80211_stop_queues(priv->hw);
2603
2604         /* If we have not previously called iwl3945_init() then
2605          * clear all bits but the RF Kill bits and return */
2606         if (!iwl_is_init(priv)) {
2607                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2608                                         STATUS_RF_KILL_HW |
2609                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2610                                         STATUS_GEO_CONFIGURED |
2611                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2612                                         STATUS_EXIT_PENDING;
2613                 goto exit;
2614         }
2615
2616         /* ...otherwise clear out all the status bits but the RF Kill
2617          * bit and continue taking the NIC down. */
2618         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2619                                 STATUS_RF_KILL_HW |
2620                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2621                                 STATUS_GEO_CONFIGURED |
2622                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2623                                 STATUS_FW_ERROR |
2624                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2625                                 STATUS_EXIT_PENDING;
2626
2627         iwl3945_hw_txq_ctx_stop(priv);
2628         iwl3945_hw_rxq_stop(priv);
2629
2630         /* Power-down device's busmaster DMA clocks */
2631         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2632         udelay(5);
2633
2634         /* Stop the device, and put it in low power state */
2635         priv->cfg->ops->lib->apm_ops.stop(priv);
2636
2637  exit:
2638         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2639
2640         if (priv->ibss_beacon)
2641                 dev_kfree_skb(priv->ibss_beacon);
2642         priv->ibss_beacon = NULL;
2643
2644         /* clear out any free frames */
2645         iwl3945_clear_free_frames(priv);
2646 }
2647
2648 static void iwl3945_down(struct iwl_priv *priv)
2649 {
2650         mutex_lock(&priv->mutex);
2651         __iwl3945_down(priv);
2652         mutex_unlock(&priv->mutex);
2653
2654         iwl3945_cancel_deferred_work(priv);
2655 }
2656
2657 #define MAX_HW_RESTARTS 5
2658
2659 static int __iwl3945_up(struct iwl_priv *priv)
2660 {
2661         int rc, i;
2662
2663         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2664                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2665                 return -EIO;
2666         }
2667
2668         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2669                 IWL_ERR(priv, "ucode not available for device bring up\n");
2670                 return -EIO;
2671         }
2672
2673         /* If platform's RF_KILL switch is NOT set to KILL */
2674         if (iwl_read32(priv, CSR_GP_CNTRL) &
2675                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2676                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2677         else {
2678                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2679                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2680                 return -ENODEV;
2681         }
2682
2683         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2684
2685         rc = iwl3945_hw_nic_init(priv);
2686         if (rc) {
2687                 IWL_ERR(priv, "Unable to int nic\n");
2688                 return rc;
2689         }
2690
2691         /* make sure rfkill handshake bits are cleared */
2692         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2693         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2694                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2695
2696         /* clear (again), then enable host interrupts */
2697         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2698         iwl_enable_interrupts(priv);
2699
2700         /* really make sure rfkill handshake bits are cleared */
2701         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2702         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2703
2704         /* Copy original ucode data image from disk into backup cache.
2705          * This will be used to initialize the on-board processor's
2706          * data SRAM for a clean start when the runtime program first loads. */
2707         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2708                priv->ucode_data.len);
2709
2710         /* We return success when we resume from suspend and rf_kill is on. */
2711         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2712                 return 0;
2713
2714         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2715
2716                 iwl_clear_stations_table(priv);
2717
2718                 /* load bootstrap state machine,
2719                  * load bootstrap program into processor's memory,
2720                  * prepare to load the "initialize" uCode */
2721                 priv->cfg->ops->lib->load_ucode(priv);
2722
2723                 if (rc) {
2724                         IWL_ERR(priv,
2725                                 "Unable to set up bootstrap uCode: %d\n", rc);
2726                         continue;
2727                 }
2728
2729                 /* start card; "initialize" will load runtime ucode */
2730                 iwl3945_nic_start(priv);
2731
2732                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2733
2734                 return 0;
2735         }
2736
2737         set_bit(STATUS_EXIT_PENDING, &priv->status);
2738         __iwl3945_down(priv);
2739         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2740
2741         /* tried to restart and config the device for as long as our
2742          * patience could withstand */
2743         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2744         return -EIO;
2745 }
2746
2747
2748 /*****************************************************************************
2749  *
2750  * Workqueue callbacks
2751  *
2752  *****************************************************************************/
2753
2754 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2755 {
2756         struct iwl_priv *priv =
2757             container_of(data, struct iwl_priv, init_alive_start.work);
2758
2759         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2760                 return;
2761
2762         mutex_lock(&priv->mutex);
2763         iwl3945_init_alive_start(priv);
2764         mutex_unlock(&priv->mutex);
2765 }
2766
2767 static void iwl3945_bg_alive_start(struct work_struct *data)
2768 {
2769         struct iwl_priv *priv =
2770             container_of(data, struct iwl_priv, alive_start.work);
2771
2772         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2773                 return;
2774
2775         mutex_lock(&priv->mutex);
2776         iwl3945_alive_start(priv);
2777         mutex_unlock(&priv->mutex);
2778 }
2779
2780 /*
2781  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2782  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2783  * *is* readable even when device has been SW_RESET into low power mode
2784  * (e.g. during RF KILL).
2785  */
2786 static void iwl3945_rfkill_poll(struct work_struct *data)
2787 {
2788         struct iwl_priv *priv =
2789             container_of(data, struct iwl_priv, rfkill_poll.work);
2790         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2791         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2792                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2793
2794         if (new_rfkill != old_rfkill) {
2795                 if (new_rfkill)
2796                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2797                 else
2798                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2799
2800                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2801
2802                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2803                                 new_rfkill ? "disable radio" : "enable radio");
2804         }
2805
2806         /* Keep this running, even if radio now enabled.  This will be
2807          * cancelled in mac_start() if system decides to start again */
2808         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2809                            round_jiffies_relative(2 * HZ));
2810
2811 }
2812
2813 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2814 static void iwl3945_bg_request_scan(struct work_struct *data)
2815 {
2816         struct iwl_priv *priv =
2817             container_of(data, struct iwl_priv, request_scan);
2818         struct iwl_host_cmd cmd = {
2819                 .id = REPLY_SCAN_CMD,
2820                 .len = sizeof(struct iwl3945_scan_cmd),
2821                 .flags = CMD_SIZE_HUGE,
2822         };
2823         int rc = 0;
2824         struct iwl3945_scan_cmd *scan;
2825         struct ieee80211_conf *conf = NULL;
2826         u8 n_probes = 0;
2827         enum ieee80211_band band;
2828         bool is_active = false;
2829
2830         conf = ieee80211_get_hw_conf(priv->hw);
2831
2832         mutex_lock(&priv->mutex);
2833
2834         cancel_delayed_work(&priv->scan_check);
2835
2836         if (!iwl_is_ready(priv)) {
2837                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2838                 goto done;
2839         }
2840
2841         /* Make sure the scan wasn't canceled before this queued work
2842          * was given the chance to run... */
2843         if (!test_bit(STATUS_SCANNING, &priv->status))
2844                 goto done;
2845
2846         /* This should never be called or scheduled if there is currently
2847          * a scan active in the hardware. */
2848         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2849                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2850                                 "Ignoring second request.\n");
2851                 rc = -EIO;
2852                 goto done;
2853         }
2854
2855         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2856                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2857                 goto done;
2858         }
2859
2860         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2861                 IWL_DEBUG_HC(priv,
2862                         "Scan request while abort pending. Queuing.\n");
2863                 goto done;
2864         }
2865
2866         if (iwl_is_rfkill(priv)) {
2867                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2868                 goto done;
2869         }
2870
2871         if (!test_bit(STATUS_READY, &priv->status)) {
2872                 IWL_DEBUG_HC(priv,
2873                         "Scan request while uninitialized. Queuing.\n");
2874                 goto done;
2875         }
2876
2877         if (!priv->scan_bands) {
2878                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2879                 goto done;
2880         }
2881
2882         if (!priv->scan) {
2883                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2884                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2885                 if (!priv->scan) {
2886                         rc = -ENOMEM;
2887                         goto done;
2888                 }
2889         }
2890         scan = priv->scan;
2891         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2892
2893         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2894         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2895
2896         if (iwl_is_associated(priv)) {
2897                 u16 interval = 0;
2898                 u32 extra;
2899                 u32 suspend_time = 100;
2900                 u32 scan_suspend_time = 100;
2901                 unsigned long flags;
2902
2903                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2904
2905                 spin_lock_irqsave(&priv->lock, flags);
2906                 interval = priv->beacon_int;
2907                 spin_unlock_irqrestore(&priv->lock, flags);
2908
2909                 scan->suspend_time = 0;
2910                 scan->max_out_time = cpu_to_le32(200 * 1024);
2911                 if (!interval)
2912                         interval = suspend_time;
2913                 /*
2914                  * suspend time format:
2915                  *  0-19: beacon interval in usec (time before exec.)
2916                  * 20-23: 0
2917                  * 24-31: number of beacons (suspend between channels)
2918                  */
2919
2920                 extra = (suspend_time / interval) << 24;
2921                 scan_suspend_time = 0xFF0FFFFF &
2922                     (extra | ((suspend_time % interval) * 1024));
2923
2924                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2925                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2926                                scan_suspend_time, interval);
2927         }
2928
2929         if (priv->scan_request->n_ssids) {
2930                 int i, p = 0;
2931                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2932                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2933                         /* always does wildcard anyway */
2934                         if (!priv->scan_request->ssids[i].ssid_len)
2935                                 continue;
2936                         scan->direct_scan[p].id = WLAN_EID_SSID;
2937                         scan->direct_scan[p].len =
2938                                 priv->scan_request->ssids[i].ssid_len;
2939                         memcpy(scan->direct_scan[p].ssid,
2940                                priv->scan_request->ssids[i].ssid,
2941                                priv->scan_request->ssids[i].ssid_len);
2942                         n_probes++;
2943                         p++;
2944                 }
2945                 is_active = true;
2946         } else
2947                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2948
2949         /* We don't build a direct scan probe request; the uCode will do
2950          * that based on the direct_mask added to each channel entry */
2951         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2952         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2953         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2954
2955         /* flags + rate selection */
2956
2957         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2958                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2959                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2960                 scan->good_CRC_th = 0;
2961                 band = IEEE80211_BAND_2GHZ;
2962         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2963                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2964                 /*
2965                  * If active scaning is requested but a certain channel
2966                  * is marked passive, we can do active scanning if we
2967                  * detect transmissions.
2968                  */
2969                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2970                 band = IEEE80211_BAND_5GHZ;
2971         } else {
2972                 IWL_WARN(priv, "Invalid scan band count\n");
2973                 goto done;
2974         }
2975
2976         scan->tx_cmd.len = cpu_to_le16(
2977                         iwl_fill_probe_req(priv,
2978                                 (struct ieee80211_mgmt *)scan->data,
2979                                 priv->scan_request->ie,
2980                                 priv->scan_request->ie_len,
2981                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2982
2983         /* select Rx antennas */
2984         scan->flags |= iwl3945_get_antenna_flags(priv);
2985
2986         if (iwl_is_monitor_mode(priv))
2987                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2988
2989         scan->channel_count =
2990                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2991                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2992
2993         if (scan->channel_count == 0) {
2994                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2995                 goto done;
2996         }
2997
2998         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2999             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3000         cmd.data = scan;
3001         scan->len = cpu_to_le16(cmd.len);
3002
3003         set_bit(STATUS_SCAN_HW, &priv->status);
3004         rc = iwl_send_cmd_sync(priv, &cmd);
3005         if (rc)
3006                 goto done;
3007
3008         queue_delayed_work(priv->workqueue, &priv->scan_check,
3009                            IWL_SCAN_CHECK_WATCHDOG);
3010
3011         mutex_unlock(&priv->mutex);
3012         return;
3013
3014  done:
3015         /* can not perform scan make sure we clear scanning
3016          * bits from status so next scan request can be performed.
3017          * if we dont clear scanning status bit here all next scan
3018          * will fail
3019         */
3020         clear_bit(STATUS_SCAN_HW, &priv->status);
3021         clear_bit(STATUS_SCANNING, &priv->status);
3022
3023         /* inform mac80211 scan aborted */
3024         queue_work(priv->workqueue, &priv->scan_completed);
3025         mutex_unlock(&priv->mutex);
3026 }
3027
3028 static void iwl3945_bg_restart(struct work_struct *data)
3029 {
3030         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3031
3032         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3033                 return;
3034
3035         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3036                 mutex_lock(&priv->mutex);
3037                 priv->vif = NULL;
3038                 priv->is_open = 0;
3039                 mutex_unlock(&priv->mutex);
3040                 iwl3945_down(priv);
3041                 ieee80211_restart_hw(priv->hw);
3042         } else {
3043                 iwl3945_down(priv);
3044
3045                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3046                         return;
3047
3048                 mutex_lock(&priv->mutex);
3049                 __iwl3945_up(priv);
3050                 mutex_unlock(&priv->mutex);
3051         }
3052 }
3053
3054 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3055 {
3056         struct iwl_priv *priv =
3057             container_of(data, struct iwl_priv, rx_replenish);
3058
3059         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3060                 return;
3061
3062         mutex_lock(&priv->mutex);
3063         iwl3945_rx_replenish(priv);
3064         mutex_unlock(&priv->mutex);
3065 }
3066
3067 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3068
3069 void iwl3945_post_associate(struct iwl_priv *priv)
3070 {
3071         int rc = 0;
3072         struct ieee80211_conf *conf = NULL;
3073
3074         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3075                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3076                 return;
3077         }
3078
3079
3080         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3081                         priv->assoc_id, priv->active_rxon.bssid_addr);
3082
3083         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3084                 return;
3085
3086         if (!priv->vif || !priv->is_open)
3087                 return;
3088
3089         iwl_scan_cancel_timeout(priv, 200);
3090
3091         conf = ieee80211_get_hw_conf(priv->hw);
3092
3093         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3094         iwlcore_commit_rxon(priv);
3095
3096         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3097         iwl_setup_rxon_timing(priv);
3098         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3099                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3100         if (rc)
3101                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3102                             "Attempting to continue.\n");
3103
3104         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3105
3106         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3107
3108         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3109                         priv->assoc_id, priv->beacon_int);
3110
3111         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3112                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3113         else
3114                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3115
3116         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3117                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3118                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3119                 else
3120                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3121
3122                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3123                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3124
3125         }
3126
3127         iwlcore_commit_rxon(priv);
3128
3129         switch (priv->iw_mode) {
3130         case NL80211_IFTYPE_STATION:
3131                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3132                 break;
3133
3134         case NL80211_IFTYPE_ADHOC:
3135
3136                 priv->assoc_id = 1;
3137                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3138                 iwl3945_sync_sta(priv, IWL_STA_ID,
3139                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3140                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3141                                  CMD_ASYNC);
3142                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3143                 iwl3945_send_beacon_cmd(priv);
3144
3145                 break;
3146
3147         default:
3148                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3149                            __func__, priv->iw_mode);
3150                 break;
3151         }
3152
3153         iwl_activate_qos(priv, 0);
3154
3155         /* we have just associated, don't start scan too early */
3156         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3157 }
3158
3159 /*****************************************************************************
3160  *
3161  * mac80211 entry point functions
3162  *
3163  *****************************************************************************/
3164
3165 #define UCODE_READY_TIMEOUT     (2 * HZ)
3166
3167 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3168 {
3169         struct iwl_priv *priv = hw->priv;
3170         int ret;
3171
3172         IWL_DEBUG_MAC80211(priv, "enter\n");
3173
3174         /* we should be verifying the device is ready to be opened */
3175         mutex_lock(&priv->mutex);
3176
3177         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3178          * ucode filename and max sizes are card-specific. */
3179
3180         if (!priv->ucode_code.len) {
3181                 ret = iwl3945_read_ucode(priv);
3182                 if (ret) {
3183                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3184                         mutex_unlock(&priv->mutex);
3185                         goto out_release_irq;
3186                 }
3187         }
3188
3189         ret = __iwl3945_up(priv);
3190
3191         mutex_unlock(&priv->mutex);
3192
3193         if (ret)
3194                 goto out_release_irq;
3195
3196         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3197
3198         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3199          * mac80211 will not be run successfully. */
3200         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3201                         test_bit(STATUS_READY, &priv->status),
3202                         UCODE_READY_TIMEOUT);
3203         if (!ret) {
3204                 if (!test_bit(STATUS_READY, &priv->status)) {
3205                         IWL_ERR(priv,
3206                                 "Wait for START_ALIVE timeout after %dms.\n",
3207                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3208                         ret = -ETIMEDOUT;
3209                         goto out_release_irq;
3210                 }
3211         }
3212
3213         /* ucode is running and will send rfkill notifications,
3214          * no need to poll the killswitch state anymore */
3215         cancel_delayed_work(&priv->rfkill_poll);
3216
3217         iwl_led_start(priv);
3218
3219         priv->is_open = 1;
3220         IWL_DEBUG_MAC80211(priv, "leave\n");
3221         return 0;
3222
3223 out_release_irq:
3224         priv->is_open = 0;
3225         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3226         return ret;
3227 }
3228
3229 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3230 {
3231         struct iwl_priv *priv = hw->priv;
3232
3233         IWL_DEBUG_MAC80211(priv, "enter\n");
3234
3235         if (!priv->is_open) {
3236                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3237                 return;
3238         }
3239
3240         priv->is_open = 0;
3241
3242         if (iwl_is_ready_rf(priv)) {
3243                 /* stop mac, cancel any scan request and clear
3244                  * RXON_FILTER_ASSOC_MSK BIT
3245                  */
3246                 mutex_lock(&priv->mutex);
3247                 iwl_scan_cancel_timeout(priv, 100);
3248                 mutex_unlock(&priv->mutex);
3249         }
3250
3251         iwl3945_down(priv);
3252
3253         flush_workqueue(priv->workqueue);
3254
3255         /* start polling the killswitch state again */
3256         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3257                            round_jiffies_relative(2 * HZ));
3258
3259         IWL_DEBUG_MAC80211(priv, "leave\n");
3260 }
3261
3262 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3263 {
3264         struct iwl_priv *priv = hw->priv;
3265
3266         IWL_DEBUG_MAC80211(priv, "enter\n");
3267
3268         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3269                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3270
3271         if (iwl3945_tx_skb(priv, skb))
3272                 dev_kfree_skb_any(skb);
3273
3274         IWL_DEBUG_MAC80211(priv, "leave\n");
3275         return NETDEV_TX_OK;
3276 }
3277
3278 void iwl3945_config_ap(struct iwl_priv *priv)
3279 {
3280         int rc = 0;
3281
3282         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3283                 return;
3284
3285         /* The following should be done only at AP bring up */
3286         if (!(iwl_is_associated(priv))) {
3287
3288                 /* RXON - unassoc (to set timing command) */
3289                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3290                 iwlcore_commit_rxon(priv);
3291
3292                 /* RXON Timing */
3293                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3294                 iwl_setup_rxon_timing(priv);
3295                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3296                                       sizeof(priv->rxon_timing),
3297                                       &priv->rxon_timing);
3298                 if (rc)
3299                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3300                                         "Attempting to continue.\n");
3301
3302                 /* FIXME: what should be the assoc_id for AP? */
3303                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3304                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3305                         priv->staging_rxon.flags |=
3306                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3307                 else
3308                         priv->staging_rxon.flags &=
3309                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3310
3311                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3312                         if (priv->assoc_capability &
3313                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3314                                 priv->staging_rxon.flags |=
3315                                         RXON_FLG_SHORT_SLOT_MSK;
3316                         else
3317                                 priv->staging_rxon.flags &=
3318                                         ~RXON_FLG_SHORT_SLOT_MSK;
3319
3320                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3321                                 priv->staging_rxon.flags &=
3322                                         ~RXON_FLG_SHORT_SLOT_MSK;
3323                 }
3324                 /* restore RXON assoc */
3325                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3326                 iwlcore_commit_rxon(priv);
3327                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3328         }
3329         iwl3945_send_beacon_cmd(priv);
3330
3331         /* FIXME - we need to add code here to detect a totally new
3332          * configuration, reset the AP, unassoc, rxon timing, assoc,
3333          * clear sta table, add BCAST sta... */
3334 }
3335
3336 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3337                                struct ieee80211_vif *vif,
3338                                struct ieee80211_sta *sta,
3339                                struct ieee80211_key_conf *key)
3340 {
3341         struct iwl_priv *priv = hw->priv;
3342         const u8 *addr;
3343         int ret = 0;
3344         u8 sta_id = IWL_INVALID_STATION;
3345         u8 static_key;
3346
3347         IWL_DEBUG_MAC80211(priv, "enter\n");
3348
3349         if (iwl3945_mod_params.sw_crypto) {
3350                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3351                 return -EOPNOTSUPP;
3352         }
3353
3354         addr = sta ? sta->addr : iwl_bcast_addr;
3355         static_key = !iwl_is_associated(priv);
3356
3357         if (!static_key) {
3358                 sta_id = iwl_find_station(priv, addr);
3359                 if (sta_id == IWL_INVALID_STATION) {
3360                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3361                                             addr);
3362                         return -EINVAL;
3363                 }
3364         }
3365
3366         mutex_lock(&priv->mutex);
3367         iwl_scan_cancel_timeout(priv, 100);
3368         mutex_unlock(&priv->mutex);
3369
3370         switch (cmd) {
3371         case SET_KEY:
3372                 if (static_key)
3373                         ret = iwl3945_set_static_key(priv, key);
3374                 else
3375                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3376                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3377                 break;
3378         case DISABLE_KEY:
3379                 if (static_key)
3380                         ret = iwl3945_remove_static_key(priv);
3381                 else
3382                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3383                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3384                 break;
3385         default:
3386                 ret = -EINVAL;
3387         }
3388
3389         IWL_DEBUG_MAC80211(priv, "leave\n");
3390
3391         return ret;
3392 }
3393
3394 /*****************************************************************************
3395  *
3396  * sysfs attributes
3397  *
3398  *****************************************************************************/
3399
3400 #ifdef CONFIG_IWLWIFI_DEBUG
3401
3402 /*
3403  * The following adds a new attribute to the sysfs representation
3404  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3405  * used for controlling the debug level.
3406  *
3407  * See the level definitions in iwl for details.
3408  *
3409  * The debug_level being managed using sysfs below is a per device debug
3410  * level that is used instead of the global debug level if it (the per
3411  * device debug level) is set.
3412  */
3413 static ssize_t show_debug_level(struct device *d,
3414                                 struct device_attribute *attr, char *buf)
3415 {
3416         struct iwl_priv *priv = dev_get_drvdata(d);
3417         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3418 }
3419 static ssize_t store_debug_level(struct device *d,
3420                                 struct device_attribute *attr,
3421                                  const char *buf, size_t count)
3422 {
3423         struct iwl_priv *priv = dev_get_drvdata(d);
3424         unsigned long val;
3425         int ret;
3426
3427         ret = strict_strtoul(buf, 0, &val);
3428         if (ret)
3429                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3430         else {
3431                 priv->debug_level = val;
3432                 if (iwl_alloc_traffic_mem(priv))
3433                         IWL_ERR(priv,
3434                                 "Not enough memory to generate traffic log\n");
3435         }
3436         return strnlen(buf, count);
3437 }
3438
3439 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3440                         show_debug_level, store_debug_level);
3441
3442 #endif /* CONFIG_IWLWIFI_DEBUG */
3443
3444 static ssize_t show_temperature(struct device *d,
3445                                 struct device_attribute *attr, char *buf)
3446 {
3447         struct iwl_priv *priv = dev_get_drvdata(d);
3448
3449         if (!iwl_is_alive(priv))
3450                 return -EAGAIN;
3451
3452         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3453 }
3454
3455 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3456
3457 static ssize_t show_tx_power(struct device *d,
3458                              struct device_attribute *attr, char *buf)
3459 {
3460         struct iwl_priv *priv = dev_get_drvdata(d);
3461         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3462 }
3463
3464 static ssize_t store_tx_power(struct device *d,
3465                               struct device_attribute *attr,
3466                               const char *buf, size_t count)
3467 {
3468         struct iwl_priv *priv = dev_get_drvdata(d);
3469         char *p = (char *)buf;
3470         u32 val;
3471
3472         val = simple_strtoul(p, &p, 10);
3473         if (p == buf)
3474                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3475         else
3476                 iwl3945_hw_reg_set_txpower(priv, val);
3477
3478         return count;
3479 }
3480
3481 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3482
3483 static ssize_t show_flags(struct device *d,
3484                           struct device_attribute *attr, char *buf)
3485 {
3486         struct iwl_priv *priv = dev_get_drvdata(d);
3487
3488         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3489 }
3490
3491 static ssize_t store_flags(struct device *d,
3492                            struct device_attribute *attr,
3493                            const char *buf, size_t count)
3494 {
3495         struct iwl_priv *priv = dev_get_drvdata(d);
3496         u32 flags = simple_strtoul(buf, NULL, 0);
3497
3498         mutex_lock(&priv->mutex);
3499         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3500                 /* Cancel any currently running scans... */
3501                 if (iwl_scan_cancel_timeout(priv, 100))
3502                         IWL_WARN(priv, "Could not cancel scan.\n");
3503                 else {
3504                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3505                                        flags);
3506                         priv->staging_rxon.flags = cpu_to_le32(flags);
3507                         iwlcore_commit_rxon(priv);
3508                 }
3509         }
3510         mutex_unlock(&priv->mutex);
3511
3512         return count;
3513 }
3514
3515 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3516
3517 static ssize_t show_filter_flags(struct device *d,
3518                                  struct device_attribute *attr, char *buf)
3519 {
3520         struct iwl_priv *priv = dev_get_drvdata(d);
3521
3522         return sprintf(buf, "0x%04X\n",
3523                 le32_to_cpu(priv->active_rxon.filter_flags));
3524 }
3525
3526 static ssize_t store_filter_flags(struct device *d,
3527                                   struct device_attribute *attr,
3528                                   const char *buf, size_t count)
3529 {
3530         struct iwl_priv *priv = dev_get_drvdata(d);
3531         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3532
3533         mutex_lock(&priv->mutex);
3534         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3535                 /* Cancel any currently running scans... */
3536                 if (iwl_scan_cancel_timeout(priv, 100))
3537                         IWL_WARN(priv, "Could not cancel scan.\n");
3538                 else {
3539                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3540                                        "0x%04X\n", filter_flags);
3541                         priv->staging_rxon.filter_flags =
3542                                 cpu_to_le32(filter_flags);
3543                         iwlcore_commit_rxon(priv);
3544                 }
3545         }
3546         mutex_unlock(&priv->mutex);
3547
3548         return count;
3549 }
3550
3551 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3552                    store_filter_flags);
3553
3554 static ssize_t show_measurement(struct device *d,
3555                                 struct device_attribute *attr, char *buf)
3556 {
3557         struct iwl_priv *priv = dev_get_drvdata(d);
3558         struct iwl_spectrum_notification measure_report;
3559         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3560         u8 *data = (u8 *)&measure_report;
3561         unsigned long flags;
3562
3563         spin_lock_irqsave(&priv->lock, flags);
3564         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3565                 spin_unlock_irqrestore(&priv->lock, flags);
3566                 return 0;
3567         }
3568         memcpy(&measure_report, &priv->measure_report, size);
3569         priv->measurement_status = 0;
3570         spin_unlock_irqrestore(&priv->lock, flags);
3571
3572         while (size && (PAGE_SIZE - len)) {
3573                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3574                                    PAGE_SIZE - len, 1);
3575                 len = strlen(buf);
3576                 if (PAGE_SIZE - len)
3577                         buf[len++] = '\n';
3578
3579                 ofs += 16;
3580                 size -= min(size, 16U);
3581         }
3582
3583         return len;
3584 }
3585
3586 static ssize_t store_measurement(struct device *d,
3587                                  struct device_attribute *attr,
3588                                  const char *buf, size_t count)
3589 {
3590         struct iwl_priv *priv = dev_get_drvdata(d);
3591         struct ieee80211_measurement_params params = {
3592                 .channel = le16_to_cpu(priv->active_rxon.channel),
3593                 .start_time = cpu_to_le64(priv->last_tsf),
3594                 .duration = cpu_to_le16(1),
3595         };
3596         u8 type = IWL_MEASURE_BASIC;
3597         u8 buffer[32];
3598         u8 channel;
3599
3600         if (count) {
3601                 char *p = buffer;
3602                 strncpy(buffer, buf, min(sizeof(buffer), count));
3603                 channel = simple_strtoul(p, NULL, 0);
3604                 if (channel)
3605                         params.channel = channel;
3606
3607                 p = buffer;
3608                 while (*p && *p != ' ')
3609                         p++;
3610                 if (*p)
3611                         type = simple_strtoul(p + 1, NULL, 0);
3612         }
3613
3614         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3615                        "channel %d (for '%s')\n", type, params.channel, buf);
3616         iwl3945_get_measurement(priv, &params, type);
3617
3618         return count;
3619 }
3620
3621 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3622                    show_measurement, store_measurement);
3623
3624 static ssize_t store_retry_rate(struct device *d,
3625                                 struct device_attribute *attr,
3626                                 const char *buf, size_t count)
3627 {
3628         struct iwl_priv *priv = dev_get_drvdata(d);
3629
3630         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3631         if (priv->retry_rate <= 0)
3632                 priv->retry_rate = 1;
3633
3634         return count;
3635 }
3636
3637 static ssize_t show_retry_rate(struct device *d,
3638                                struct device_attribute *attr, char *buf)
3639 {
3640         struct iwl_priv *priv = dev_get_drvdata(d);
3641         return sprintf(buf, "%d", priv->retry_rate);
3642 }
3643
3644 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3645                    store_retry_rate);
3646
3647
3648 static ssize_t show_channels(struct device *d,
3649                              struct device_attribute *attr, char *buf)
3650 {
3651         /* all this shit doesn't belong into sysfs anyway */
3652         return 0;
3653 }
3654
3655 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3656
3657 static ssize_t show_statistics(struct device *d,
3658                                struct device_attribute *attr, char *buf)
3659 {
3660         struct iwl_priv *priv = dev_get_drvdata(d);
3661         u32 size = sizeof(struct iwl3945_notif_statistics);
3662         u32 len = 0, ofs = 0;
3663         u8 *data = (u8 *)&priv->statistics_39;
3664         int rc = 0;
3665
3666         if (!iwl_is_alive(priv))
3667                 return -EAGAIN;
3668
3669         mutex_lock(&priv->mutex);
3670         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3671         mutex_unlock(&priv->mutex);
3672
3673         if (rc) {
3674                 len = sprintf(buf,
3675                               "Error sending statistics request: 0x%08X\n", rc);
3676                 return len;
3677         }
3678
3679         while (size && (PAGE_SIZE - len)) {
3680                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3681                                    PAGE_SIZE - len, 1);
3682                 len = strlen(buf);
3683                 if (PAGE_SIZE - len)
3684                         buf[len++] = '\n';
3685
3686                 ofs += 16;
3687                 size -= min(size, 16U);
3688         }
3689
3690         return len;
3691 }
3692
3693 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3694
3695 static ssize_t show_antenna(struct device *d,
3696                             struct device_attribute *attr, char *buf)
3697 {
3698         struct iwl_priv *priv = dev_get_drvdata(d);
3699
3700         if (!iwl_is_alive(priv))
3701                 return -EAGAIN;
3702
3703         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3704 }
3705
3706 static ssize_t store_antenna(struct device *d,
3707                              struct device_attribute *attr,
3708                              const char *buf, size_t count)
3709 {
3710         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3711         int ant;
3712
3713         if (count == 0)
3714                 return 0;
3715
3716         if (sscanf(buf, "%1i", &ant) != 1) {
3717                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3718                 return count;
3719         }
3720
3721         if ((ant >= 0) && (ant <= 2)) {
3722                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3723                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3724         } else
3725                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3726
3727
3728         return count;
3729 }
3730
3731 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3732
3733 static ssize_t show_status(struct device *d,
3734                            struct device_attribute *attr, char *buf)
3735 {
3736         struct iwl_priv *priv = dev_get_drvdata(d);
3737         if (!iwl_is_alive(priv))
3738                 return -EAGAIN;
3739         return sprintf(buf, "0x%08x\n", (int)priv->status);
3740 }
3741
3742 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3743
3744 static ssize_t dump_error_log(struct device *d,
3745                               struct device_attribute *attr,
3746                               const char *buf, size_t count)
3747 {
3748         struct iwl_priv *priv = dev_get_drvdata(d);
3749         char *p = (char *)buf;
3750
3751         if (p[0] == '1')
3752                 iwl3945_dump_nic_error_log(priv);
3753
3754         return strnlen(buf, count);
3755 }
3756
3757 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3758
3759 /*****************************************************************************
3760  *
3761  * driver setup and tear down
3762  *
3763  *****************************************************************************/
3764
3765 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3766 {
3767         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3768
3769         init_waitqueue_head(&priv->wait_command_queue);
3770
3771         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3772         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3773         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3774         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3775         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3776         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3777         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3778         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3779         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3780         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3781
3782         iwl3945_hw_setup_deferred_work(priv);
3783
3784         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3785                      iwl3945_irq_tasklet, (unsigned long)priv);
3786 }
3787
3788 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3789 {
3790         iwl3945_hw_cancel_deferred_work(priv);
3791
3792         cancel_delayed_work_sync(&priv->init_alive_start);
3793         cancel_delayed_work(&priv->scan_check);
3794         cancel_delayed_work(&priv->alive_start);
3795         cancel_work_sync(&priv->beacon_update);
3796 }
3797
3798 static struct attribute *iwl3945_sysfs_entries[] = {
3799         &dev_attr_antenna.attr,
3800         &dev_attr_channels.attr,
3801         &dev_attr_dump_errors.attr,
3802         &dev_attr_flags.attr,
3803         &dev_attr_filter_flags.attr,
3804         &dev_attr_measurement.attr,
3805         &dev_attr_retry_rate.attr,
3806         &dev_attr_statistics.attr,
3807         &dev_attr_status.attr,
3808         &dev_attr_temperature.attr,
3809         &dev_attr_tx_power.attr,
3810 #ifdef CONFIG_IWLWIFI_DEBUG
3811         &dev_attr_debug_level.attr,
3812 #endif
3813         NULL
3814 };
3815
3816 static struct attribute_group iwl3945_attribute_group = {
3817         .name = NULL,           /* put in device directory */
3818         .attrs = iwl3945_sysfs_entries,
3819 };
3820
3821 static struct ieee80211_ops iwl3945_hw_ops = {
3822         .tx = iwl3945_mac_tx,
3823         .start = iwl3945_mac_start,
3824         .stop = iwl3945_mac_stop,
3825         .add_interface = iwl_mac_add_interface,
3826         .remove_interface = iwl_mac_remove_interface,
3827         .config = iwl_mac_config,
3828         .configure_filter = iwl_configure_filter,
3829         .set_key = iwl3945_mac_set_key,
3830         .conf_tx = iwl_mac_conf_tx,
3831         .reset_tsf = iwl_mac_reset_tsf,
3832         .bss_info_changed = iwl_bss_info_changed,
3833         .hw_scan = iwl_mac_hw_scan
3834 };
3835
3836 static int iwl3945_init_drv(struct iwl_priv *priv)
3837 {
3838         int ret;
3839         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3840
3841         priv->retry_rate = 1;
3842         priv->ibss_beacon = NULL;
3843
3844         spin_lock_init(&priv->sta_lock);
3845         spin_lock_init(&priv->hcmd_lock);
3846
3847         INIT_LIST_HEAD(&priv->free_frames);
3848
3849         mutex_init(&priv->mutex);
3850         mutex_init(&priv->sync_cmd_mutex);
3851
3852         /* Clear the driver's (not device's) station table */
3853         iwl_clear_stations_table(priv);
3854
3855         priv->ieee_channels = NULL;
3856         priv->ieee_rates = NULL;
3857         priv->band = IEEE80211_BAND_2GHZ;
3858
3859         priv->iw_mode = NL80211_IFTYPE_STATION;
3860         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3861
3862         iwl_reset_qos(priv);
3863
3864         priv->qos_data.qos_active = 0;
3865         priv->qos_data.qos_cap.val = 0;
3866
3867         priv->rates_mask = IWL_RATES_MASK;
3868         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3869
3870         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3871                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3872                          eeprom->version);
3873                 ret = -EINVAL;
3874                 goto err;
3875         }
3876         ret = iwl_init_channel_map(priv);
3877         if (ret) {
3878                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3879                 goto err;
3880         }
3881
3882         /* Set up txpower settings in driver for all channels */
3883         if (iwl3945_txpower_set_from_eeprom(priv)) {
3884                 ret = -EIO;
3885                 goto err_free_channel_map;
3886         }
3887
3888         ret = iwlcore_init_geos(priv);
3889         if (ret) {
3890                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3891                 goto err_free_channel_map;
3892         }
3893         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3894
3895         return 0;
3896
3897 err_free_channel_map:
3898         iwl_free_channel_map(priv);
3899 err:
3900         return ret;
3901 }
3902
3903 static int iwl3945_setup_mac(struct iwl_priv *priv)
3904 {
3905         int ret;
3906         struct ieee80211_hw *hw = priv->hw;
3907
3908         hw->rate_control_algorithm = "iwl-3945-rs";
3909         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3910
3911         /* Tell mac80211 our characteristics */
3912         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3913                     IEEE80211_HW_NOISE_DBM |
3914                     IEEE80211_HW_SPECTRUM_MGMT;
3915
3916         if (!priv->cfg->broken_powersave)
3917                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3918                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3919
3920         hw->wiphy->interface_modes =
3921                 BIT(NL80211_IFTYPE_STATION) |
3922                 BIT(NL80211_IFTYPE_ADHOC);
3923
3924         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3925                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3926
3927         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3928         /* we create the 802.11 header and a zero-length SSID element */
3929         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3930
3931         /* Default value; 4 EDCA QOS priorities */
3932         hw->queues = 4;
3933
3934         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3935                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3936                         &priv->bands[IEEE80211_BAND_2GHZ];
3937
3938         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3939                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3940                         &priv->bands[IEEE80211_BAND_5GHZ];
3941
3942         ret = ieee80211_register_hw(priv->hw);
3943         if (ret) {
3944                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3945                 return ret;
3946         }
3947         priv->mac80211_registered = 1;
3948
3949         return 0;
3950 }
3951
3952 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3953 {
3954         int err = 0;
3955         struct iwl_priv *priv;
3956         struct ieee80211_hw *hw;
3957         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3958         struct iwl3945_eeprom *eeprom;
3959         unsigned long flags;
3960
3961         /***********************
3962          * 1. Allocating HW data
3963          * ********************/
3964
3965         /* mac80211 allocates memory for this device instance, including
3966          *   space for this driver's private structure */
3967         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3968         if (hw == NULL) {
3969                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3970                 err = -ENOMEM;
3971                 goto out;
3972         }
3973         priv = hw->priv;
3974         SET_IEEE80211_DEV(hw, &pdev->dev);
3975
3976         /*
3977          * Disabling hardware scan means that mac80211 will perform scans
3978          * "the hard way", rather than using device's scan.
3979          */
3980         if (iwl3945_mod_params.disable_hw_scan) {
3981                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3982                 iwl3945_hw_ops.hw_scan = NULL;
3983         }
3984
3985
3986         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3987         priv->cfg = cfg;
3988         priv->pci_dev = pdev;
3989         priv->inta_mask = CSR_INI_SET_MASK;
3990
3991 #ifdef CONFIG_IWLWIFI_DEBUG
3992         atomic_set(&priv->restrict_refcnt, 0);
3993 #endif
3994         if (iwl_alloc_traffic_mem(priv))
3995                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3996
3997         /***************************
3998          * 2. Initializing PCI bus
3999          * *************************/
4000         if (pci_enable_device(pdev)) {
4001                 err = -ENODEV;
4002                 goto out_ieee80211_free_hw;
4003         }
4004
4005         pci_set_master(pdev);
4006
4007         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4008         if (!err)
4009                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4010         if (err) {
4011                 IWL_WARN(priv, "No suitable DMA available.\n");
4012                 goto out_pci_disable_device;
4013         }
4014
4015         pci_set_drvdata(pdev, priv);
4016         err = pci_request_regions(pdev, DRV_NAME);
4017         if (err)
4018                 goto out_pci_disable_device;
4019
4020         /***********************
4021          * 3. Read REV Register
4022          * ********************/
4023         priv->hw_base = pci_iomap(pdev, 0, 0);
4024         if (!priv->hw_base) {
4025                 err = -ENODEV;
4026                 goto out_pci_release_regions;
4027         }
4028
4029         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4030                         (unsigned long long) pci_resource_len(pdev, 0));
4031         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4032
4033         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4034          * PCI Tx retries from interfering with C3 CPU state */
4035         pci_write_config_byte(pdev, 0x41, 0x00);
4036
4037         /* these spin locks will be used in apm_ops.init and EEPROM access
4038          * we should init now
4039          */
4040         spin_lock_init(&priv->reg_lock);
4041         spin_lock_init(&priv->lock);
4042
4043         /*
4044          * stop and reset the on-board processor just in case it is in a
4045          * strange state ... like being left stranded by a primary kernel
4046          * and this is now the kdump kernel trying to start up
4047          */
4048         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4049
4050         /***********************
4051          * 4. Read EEPROM
4052          * ********************/
4053
4054         /* Read the EEPROM */
4055         err = iwl_eeprom_init(priv);
4056         if (err) {
4057                 IWL_ERR(priv, "Unable to init EEPROM\n");
4058                 goto out_iounmap;
4059         }
4060         /* MAC Address location in EEPROM same for 3945/4965 */
4061         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4062         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4063         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4064         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4065
4066         /***********************
4067          * 5. Setup HW Constants
4068          * ********************/
4069         /* Device-specific setup */
4070         if (iwl3945_hw_set_hw_params(priv)) {
4071                 IWL_ERR(priv, "failed to set hw settings\n");
4072                 goto out_eeprom_free;
4073         }
4074
4075         /***********************
4076          * 6. Setup priv
4077          * ********************/
4078
4079         err = iwl3945_init_drv(priv);
4080         if (err) {
4081                 IWL_ERR(priv, "initializing driver failed\n");
4082                 goto out_unset_hw_params;
4083         }
4084
4085         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4086                 priv->cfg->name);
4087
4088         /***********************
4089          * 7. Setup Services
4090          * ********************/
4091
4092         spin_lock_irqsave(&priv->lock, flags);
4093         iwl_disable_interrupts(priv);
4094         spin_unlock_irqrestore(&priv->lock, flags);
4095
4096         pci_enable_msi(priv->pci_dev);
4097
4098         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4099                           IRQF_SHARED, DRV_NAME, priv);
4100         if (err) {
4101                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4102                 goto out_disable_msi;
4103         }
4104
4105         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4106         if (err) {
4107                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4108                 goto out_release_irq;
4109         }
4110
4111         iwl_set_rxon_channel(priv,
4112                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4113         iwl3945_setup_deferred_work(priv);
4114         iwl3945_setup_rx_handlers(priv);
4115         iwl_power_initialize(priv);
4116
4117         /*********************************
4118          * 8. Setup and Register mac80211
4119          * *******************************/
4120
4121         iwl_enable_interrupts(priv);
4122
4123         err = iwl3945_setup_mac(priv);
4124         if (err)
4125                 goto  out_remove_sysfs;
4126
4127         err = iwl_dbgfs_register(priv, DRV_NAME);
4128         if (err)
4129                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4130
4131         /* Start monitoring the killswitch */
4132         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4133                            2 * HZ);
4134
4135         return 0;
4136
4137  out_remove_sysfs:
4138         destroy_workqueue(priv->workqueue);
4139         priv->workqueue = NULL;
4140         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4141  out_release_irq:
4142         free_irq(priv->pci_dev->irq, priv);
4143  out_disable_msi:
4144         pci_disable_msi(priv->pci_dev);
4145         iwlcore_free_geos(priv);
4146         iwl_free_channel_map(priv);
4147  out_unset_hw_params:
4148         iwl3945_unset_hw_params(priv);
4149  out_eeprom_free:
4150         iwl_eeprom_free(priv);
4151  out_iounmap:
4152         pci_iounmap(pdev, priv->hw_base);
4153  out_pci_release_regions:
4154         pci_release_regions(pdev);
4155  out_pci_disable_device:
4156         pci_set_drvdata(pdev, NULL);
4157         pci_disable_device(pdev);
4158  out_ieee80211_free_hw:
4159         iwl_free_traffic_mem(priv);
4160         ieee80211_free_hw(priv->hw);
4161  out:
4162         return err;
4163 }
4164
4165 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4166 {
4167         struct iwl_priv *priv = pci_get_drvdata(pdev);
4168         unsigned long flags;
4169
4170         if (!priv)
4171                 return;
4172
4173         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4174
4175         iwl_dbgfs_unregister(priv);
4176
4177         set_bit(STATUS_EXIT_PENDING, &priv->status);
4178
4179         if (priv->mac80211_registered) {
4180                 ieee80211_unregister_hw(priv->hw);
4181                 priv->mac80211_registered = 0;
4182         } else {
4183                 iwl3945_down(priv);
4184         }
4185
4186         /*
4187          * Make sure device is reset to low power before unloading driver.
4188          * This may be redundant with iwl_down(), but there are paths to
4189          * run iwl_down() without calling apm_ops.stop(), and there are
4190          * paths to avoid running iwl_down() at all before leaving driver.
4191          * This (inexpensive) call *makes sure* device is reset.
4192          */
4193         priv->cfg->ops->lib->apm_ops.stop(priv);
4194
4195         /* make sure we flush any pending irq or
4196          * tasklet for the driver
4197          */
4198         spin_lock_irqsave(&priv->lock, flags);
4199         iwl_disable_interrupts(priv);
4200         spin_unlock_irqrestore(&priv->lock, flags);
4201
4202         iwl_synchronize_irq(priv);
4203
4204         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4205
4206         cancel_delayed_work_sync(&priv->rfkill_poll);
4207
4208         iwl3945_dealloc_ucode_pci(priv);
4209
4210         if (priv->rxq.bd)
4211                 iwl3945_rx_queue_free(priv, &priv->rxq);
4212         iwl3945_hw_txq_ctx_free(priv);
4213
4214         iwl3945_unset_hw_params(priv);
4215         iwl_clear_stations_table(priv);
4216
4217         /*netif_stop_queue(dev); */
4218         flush_workqueue(priv->workqueue);
4219
4220         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4221          * priv->workqueue... so we can't take down the workqueue
4222          * until now... */
4223         destroy_workqueue(priv->workqueue);
4224         priv->workqueue = NULL;
4225         iwl_free_traffic_mem(priv);
4226
4227         free_irq(pdev->irq, priv);
4228         pci_disable_msi(pdev);
4229
4230         pci_iounmap(pdev, priv->hw_base);
4231         pci_release_regions(pdev);
4232         pci_disable_device(pdev);
4233         pci_set_drvdata(pdev, NULL);
4234
4235         iwl_free_channel_map(priv);
4236         iwlcore_free_geos(priv);
4237         kfree(priv->scan);
4238         if (priv->ibss_beacon)
4239                 dev_kfree_skb(priv->ibss_beacon);
4240
4241         ieee80211_free_hw(priv->hw);
4242 }
4243
4244
4245 /*****************************************************************************
4246  *
4247  * driver and module entry point
4248  *
4249  *****************************************************************************/
4250
4251 static struct pci_driver iwl3945_driver = {
4252         .name = DRV_NAME,
4253         .id_table = iwl3945_hw_card_ids,
4254         .probe = iwl3945_pci_probe,
4255         .remove = __devexit_p(iwl3945_pci_remove),
4256 #ifdef CONFIG_PM
4257         .suspend = iwl_pci_suspend,
4258         .resume = iwl_pci_resume,
4259 #endif
4260 };
4261
4262 static int __init iwl3945_init(void)
4263 {
4264
4265         int ret;
4266         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4267         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4268
4269         ret = iwl3945_rate_control_register();
4270         if (ret) {
4271                 printk(KERN_ERR DRV_NAME
4272                        "Unable to register rate control algorithm: %d\n", ret);
4273                 return ret;
4274         }
4275
4276         ret = pci_register_driver(&iwl3945_driver);
4277         if (ret) {
4278                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4279                 goto error_register;
4280         }
4281
4282         return ret;
4283
4284 error_register:
4285         iwl3945_rate_control_unregister();
4286         return ret;
4287 }
4288
4289 static void __exit iwl3945_exit(void)
4290 {
4291         pci_unregister_driver(&iwl3945_driver);
4292         iwl3945_rate_control_unregister();
4293 }
4294
4295 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4296
4297 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4298 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4299 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4300 MODULE_PARM_DESC(swcrypto,
4301                  "using software crypto (default 1 [software])\n");
4302 #ifdef CONFIG_IWLWIFI_DEBUG
4303 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4304 MODULE_PARM_DESC(debug, "debug output mask");
4305 #endif
4306 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4307                    int, S_IRUGO);
4308 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4309 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4310 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4311
4312 module_exit(iwl3945_exit);
4313 module_init(iwl3945_init);