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Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.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/slab.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/delay.h>
37 #include <linux/sched.h>
38 #include <linux/skbuff.h>
39 #include <linux/netdevice.h>
40 #include <linux/wireless.h>
41 #include <linux/firmware.h>
42 #include <linux/etherdevice.h>
43 #include <linux/if_arp.h>
44
45 #include <net/ieee80211_radiotap.h>
46 #include <net/mac80211.h>
47
48 #include <asm/div64.h>
49
50 #define DRV_NAME "iwl3945"
51
52 #include "iwl-fh.h"
53 #include "iwl-3945-fh.h"
54 #include "iwl-commands.h"
55 #include "iwl-sta.h"
56 #include "iwl-3945.h"
57 #include "iwl-core.h"
58 #include "iwl-helpers.h"
59 #include "iwl-dev.h"
60 #include "iwl-spectrum.h"
61
62 /*
63 * module name, copyright, version, etc.
64 */
65
66 #define DRV_DESCRIPTION \
67 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
68
69 #ifdef CONFIG_IWLWIFI_DEBUG
70 #define VD "d"
71 #else
72 #define VD
73 #endif
74
75 /*
76 * add "s" to indicate spectrum measurement included.
77 * we add it here to be consistent with previous releases in which
78 * this was configurable.
79 */
80 #define DRV_VERSION IWLWIFI_VERSION VD "s"
81 #define DRV_COPYRIGHT "Copyright(c) 2003-2010 Intel Corporation"
82 #define DRV_AUTHOR "<ilw@linux.intel.com>"
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88
89 /* module parameters */
90 struct iwl_mod_params iwl3945_mod_params = {
91 .sw_crypto = 1,
92 .restart_fw = 1,
93 /* the rest are 0 by default */
94 };
95
96 /**
97 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
98 * @priv: eeprom and antenna fields are used to determine antenna flags
99 *
100 * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
101 * iwl3945_mod_params.antenna specifies the antenna diversity mode:
102 *
103 * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
104 * IWL_ANTENNA_MAIN - Force MAIN antenna
105 * IWL_ANTENNA_AUX - Force AUX antenna
106 */
107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
108 {
109 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
110
111 switch (iwl3945_mod_params.antenna) {
112 case IWL_ANTENNA_DIVERSITY:
113 return 0;
114
115 case IWL_ANTENNA_MAIN:
116 if (eeprom->antenna_switch_type)
117 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
118 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
119
120 case IWL_ANTENNA_AUX:
121 if (eeprom->antenna_switch_type)
122 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
123 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
124 }
125
126 /* bad antenna selector value */
127 IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
128 iwl3945_mod_params.antenna);
129
130 return 0; /* "diversity" is default if error */
131 }
132
133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
134 struct ieee80211_key_conf *keyconf,
135 u8 sta_id)
136 {
137 unsigned long flags;
138 __le16 key_flags = 0;
139 int ret;
140
141 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
142 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
143
144 if (sta_id == priv->hw_params.bcast_sta_id)
145 key_flags |= STA_KEY_MULTICAST_MSK;
146
147 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
148 keyconf->hw_key_idx = keyconf->keyidx;
149 key_flags &= ~STA_KEY_FLG_INVALID;
150
151 spin_lock_irqsave(&priv->sta_lock, flags);
152 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
153 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
154 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
155 keyconf->keylen);
156
157 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
158 keyconf->keylen);
159
160 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
161 == STA_KEY_FLG_NO_ENC)
162 priv->stations[sta_id].sta.key.key_offset =
163 iwl_get_free_ucode_key_index(priv);
164 /* else, we are overriding an existing key => no need to allocated room
165 * in uCode. */
166
167 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
168 "no space for a new key");
169
170 priv->stations[sta_id].sta.key.key_flags = key_flags;
171 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
172 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
173
174 IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
175
176 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
177
178 spin_unlock_irqrestore(&priv->sta_lock, flags);
179
180 return ret;
181 }
182
183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
184 struct ieee80211_key_conf *keyconf,
185 u8 sta_id)
186 {
187 return -EOPNOTSUPP;
188 }
189
190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
191 struct ieee80211_key_conf *keyconf,
192 u8 sta_id)
193 {
194 return -EOPNOTSUPP;
195 }
196
197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
198 {
199 unsigned long flags;
200
201 spin_lock_irqsave(&priv->sta_lock, flags);
202 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
203 memset(&priv->stations[sta_id].sta.key, 0,
204 sizeof(struct iwl4965_keyinfo));
205 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
206 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
207 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
208 spin_unlock_irqrestore(&priv->sta_lock, flags);
209
210 IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
211 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
212 return 0;
213 }
214
215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
216 struct ieee80211_key_conf *keyconf, u8 sta_id)
217 {
218 int ret = 0;
219
220 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
221
222 switch (keyconf->alg) {
223 case ALG_CCMP:
224 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
225 break;
226 case ALG_TKIP:
227 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
228 break;
229 case ALG_WEP:
230 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
231 break;
232 default:
233 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
234 ret = -EINVAL;
235 }
236
237 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
238 keyconf->alg, keyconf->keylen, keyconf->keyidx,
239 sta_id, ret);
240
241 return ret;
242 }
243
244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
245 {
246 int ret = -EOPNOTSUPP;
247
248 return ret;
249 }
250
251 static int iwl3945_set_static_key(struct iwl_priv *priv,
252 struct ieee80211_key_conf *key)
253 {
254 if (key->alg == ALG_WEP)
255 return -EOPNOTSUPP;
256
257 IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
258 return -EINVAL;
259 }
260
261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
262 {
263 struct list_head *element;
264
265 IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
266 priv->frames_count);
267
268 while (!list_empty(&priv->free_frames)) {
269 element = priv->free_frames.next;
270 list_del(element);
271 kfree(list_entry(element, struct iwl3945_frame, list));
272 priv->frames_count--;
273 }
274
275 if (priv->frames_count) {
276 IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
277 priv->frames_count);
278 priv->frames_count = 0;
279 }
280 }
281
282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
283 {
284 struct iwl3945_frame *frame;
285 struct list_head *element;
286 if (list_empty(&priv->free_frames)) {
287 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
288 if (!frame) {
289 IWL_ERR(priv, "Could not allocate frame!\n");
290 return NULL;
291 }
292
293 priv->frames_count++;
294 return frame;
295 }
296
297 element = priv->free_frames.next;
298 list_del(element);
299 return list_entry(element, struct iwl3945_frame, list);
300 }
301
302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
303 {
304 memset(frame, 0, sizeof(*frame));
305 list_add(&frame->list, &priv->free_frames);
306 }
307
308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
309 struct ieee80211_hdr *hdr,
310 int left)
311 {
312
313 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
314 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
315 (priv->iw_mode != NL80211_IFTYPE_AP)))
316 return 0;
317
318 if (priv->ibss_beacon->len > left)
319 return 0;
320
321 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
322
323 return priv->ibss_beacon->len;
324 }
325
326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
327 {
328 struct iwl3945_frame *frame;
329 unsigned int frame_size;
330 int rc;
331 u8 rate;
332
333 frame = iwl3945_get_free_frame(priv);
334
335 if (!frame) {
336 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
337 "command.\n");
338 return -ENOMEM;
339 }
340
341 rate = iwl_rate_get_lowest_plcp(priv);
342
343 frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
344
345 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
346 &frame->u.cmd[0]);
347
348 iwl3945_free_frame(priv, frame);
349
350 return rc;
351 }
352
353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
354 {
355 if (priv->shared_virt)
356 dma_free_coherent(&priv->pci_dev->dev,
357 sizeof(struct iwl3945_shared),
358 priv->shared_virt,
359 priv->shared_phys);
360 }
361
362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
363 struct ieee80211_tx_info *info,
364 struct iwl_device_cmd *cmd,
365 struct sk_buff *skb_frag,
366 int sta_id)
367 {
368 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
369 struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
370
371 switch (keyinfo->alg) {
372 case ALG_CCMP:
373 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
374 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
375 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
376 break;
377
378 case ALG_TKIP:
379 break;
380
381 case ALG_WEP:
382 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
383 (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
384
385 if (keyinfo->keylen == 13)
386 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
387
388 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
389
390 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
391 "with key %d\n", info->control.hw_key->hw_key_idx);
392 break;
393
394 default:
395 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
396 break;
397 }
398 }
399
400 /*
401 * handle build REPLY_TX command notification.
402 */
403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
404 struct iwl_device_cmd *cmd,
405 struct ieee80211_tx_info *info,
406 struct ieee80211_hdr *hdr, u8 std_id)
407 {
408 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
409 __le32 tx_flags = tx_cmd->tx_flags;
410 __le16 fc = hdr->frame_control;
411
412 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
413 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
414 tx_flags |= TX_CMD_FLG_ACK_MSK;
415 if (ieee80211_is_mgmt(fc))
416 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
417 if (ieee80211_is_probe_resp(fc) &&
418 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
419 tx_flags |= TX_CMD_FLG_TSF_MSK;
420 } else {
421 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
422 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
423 }
424
425 tx_cmd->sta_id = std_id;
426 if (ieee80211_has_morefrags(fc))
427 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
428
429 if (ieee80211_is_data_qos(fc)) {
430 u8 *qc = ieee80211_get_qos_ctl(hdr);
431 tx_cmd->tid_tspec = qc[0] & 0xf;
432 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
433 } else {
434 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
435 }
436
437 priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
438
439 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
440 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
441
442 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
443 if (ieee80211_is_mgmt(fc)) {
444 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
445 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
446 else
447 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
448 } else {
449 tx_cmd->timeout.pm_frame_timeout = 0;
450 }
451
452 tx_cmd->driver_txop = 0;
453 tx_cmd->tx_flags = tx_flags;
454 tx_cmd->next_frame_len = 0;
455 }
456
457 /*
458 * start REPLY_TX command process
459 */
460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
461 {
462 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
463 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
464 struct iwl3945_tx_cmd *tx_cmd;
465 struct iwl_tx_queue *txq = NULL;
466 struct iwl_queue *q = NULL;
467 struct iwl_device_cmd *out_cmd;
468 struct iwl_cmd_meta *out_meta;
469 dma_addr_t phys_addr;
470 dma_addr_t txcmd_phys;
471 int txq_id = skb_get_queue_mapping(skb);
472 u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
473 u8 id;
474 u8 unicast;
475 u8 sta_id;
476 u8 tid = 0;
477 u16 seq_number = 0;
478 __le16 fc;
479 u8 wait_write_ptr = 0;
480 u8 *qc = NULL;
481 unsigned long flags;
482
483 spin_lock_irqsave(&priv->lock, flags);
484 if (iwl_is_rfkill(priv)) {
485 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
486 goto drop_unlock;
487 }
488
489 if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
490 IWL_ERR(priv, "ERROR: No TX rate available.\n");
491 goto drop_unlock;
492 }
493
494 unicast = !is_multicast_ether_addr(hdr->addr1);
495 id = 0;
496
497 fc = hdr->frame_control;
498
499 #ifdef CONFIG_IWLWIFI_DEBUG
500 if (ieee80211_is_auth(fc))
501 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
502 else if (ieee80211_is_assoc_req(fc))
503 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
504 else if (ieee80211_is_reassoc_req(fc))
505 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
506 #endif
507
508 /* drop all non-injected data frame if we are not associated */
509 if (ieee80211_is_data(fc) &&
510 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
511 (!iwl_is_associated(priv) ||
512 ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
513 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
514 goto drop_unlock;
515 }
516
517 spin_unlock_irqrestore(&priv->lock, flags);
518
519 hdr_len = ieee80211_hdrlen(fc);
520
521 /* Find (or create) index into station table for destination station */
522 if (info->flags & IEEE80211_TX_CTL_INJECTED)
523 sta_id = priv->hw_params.bcast_sta_id;
524 else
525 sta_id = iwl_get_sta_id(priv, hdr);
526 if (sta_id == IWL_INVALID_STATION) {
527 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
528 hdr->addr1);
529 goto drop;
530 }
531
532 IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
533
534 if (ieee80211_is_data_qos(fc)) {
535 qc = ieee80211_get_qos_ctl(hdr);
536 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
537 if (unlikely(tid >= MAX_TID_COUNT))
538 goto drop;
539 seq_number = priv->stations[sta_id].tid[tid].seq_number &
540 IEEE80211_SCTL_SEQ;
541 hdr->seq_ctrl = cpu_to_le16(seq_number) |
542 (hdr->seq_ctrl &
543 cpu_to_le16(IEEE80211_SCTL_FRAG));
544 seq_number += 0x10;
545 }
546
547 /* Descriptor for chosen Tx queue */
548 txq = &priv->txq[txq_id];
549 q = &txq->q;
550
551 if ((iwl_queue_space(q) < q->high_mark))
552 goto drop;
553
554 spin_lock_irqsave(&priv->lock, flags);
555
556 idx = get_cmd_index(q, q->write_ptr, 0);
557
558 /* Set up driver data for this TFD */
559 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
560 txq->txb[q->write_ptr].skb[0] = skb;
561
562 /* Init first empty entry in queue's array of Tx/cmd buffers */
563 out_cmd = txq->cmd[idx];
564 out_meta = &txq->meta[idx];
565 tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
566 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
567 memset(tx_cmd, 0, sizeof(*tx_cmd));
568
569 /*
570 * Set up the Tx-command (not MAC!) header.
571 * Store the chosen Tx queue and TFD index within the sequence field;
572 * after Tx, uCode's Tx response will return this value so driver can
573 * locate the frame within the tx queue and do post-tx processing.
574 */
575 out_cmd->hdr.cmd = REPLY_TX;
576 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
577 INDEX_TO_SEQ(q->write_ptr)));
578
579 /* Copy MAC header from skb into command buffer */
580 memcpy(tx_cmd->hdr, hdr, hdr_len);
581
582
583 if (info->control.hw_key)
584 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
585
586 /* TODO need this for burst mode later on */
587 iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
588
589 /* set is_hcca to 0; it probably will never be implemented */
590 iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
591
592 /* Total # bytes to be transmitted */
593 len = (u16)skb->len;
594 tx_cmd->len = cpu_to_le16(len);
595
596 iwl_dbg_log_tx_data_frame(priv, len, hdr);
597 iwl_update_stats(priv, true, fc, len);
598 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
599 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
600
601 if (!ieee80211_has_morefrags(hdr->frame_control)) {
602 txq->need_update = 1;
603 if (qc)
604 priv->stations[sta_id].tid[tid].seq_number = seq_number;
605 } else {
606 wait_write_ptr = 1;
607 txq->need_update = 0;
608 }
609
610 IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
611 le16_to_cpu(out_cmd->hdr.sequence));
612 IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
613 iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
614 iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
615 ieee80211_hdrlen(fc));
616
617 /*
618 * Use the first empty entry in this queue's command buffer array
619 * to contain the Tx command and MAC header concatenated together
620 * (payload data will be in another buffer).
621 * Size of this varies, due to varying MAC header length.
622 * If end is not dword aligned, we'll have 2 extra bytes at the end
623 * of the MAC header (device reads on dword boundaries).
624 * We'll tell device about this padding later.
625 */
626 len = sizeof(struct iwl3945_tx_cmd) +
627 sizeof(struct iwl_cmd_header) + hdr_len;
628
629 len_org = len;
630 len = (len + 3) & ~3;
631
632 if (len_org != len)
633 len_org = 1;
634 else
635 len_org = 0;
636
637 /* Physical address of this Tx command's header (not MAC header!),
638 * within command buffer array. */
639 txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
640 len, PCI_DMA_TODEVICE);
641 /* we do not map meta data ... so we can safely access address to
642 * provide to unmap command*/
643 pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
644 pci_unmap_len_set(out_meta, len, len);
645
646 /* Add buffer containing Tx command and MAC(!) header to TFD's
647 * first entry */
648 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
649 txcmd_phys, len, 1, 0);
650
651
652 /* Set up TFD's 2nd entry to point directly to remainder of skb,
653 * if any (802.11 null frames have no payload). */
654 len = skb->len - hdr_len;
655 if (len) {
656 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
657 len, PCI_DMA_TODEVICE);
658 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
659 phys_addr, len,
660 0, U32_PAD(len));
661 }
662
663
664 /* Tell device the write index *just past* this latest filled TFD */
665 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
666 iwl_txq_update_write_ptr(priv, txq);
667 spin_unlock_irqrestore(&priv->lock, flags);
668
669 if ((iwl_queue_space(q) < q->high_mark)
670 && priv->mac80211_registered) {
671 if (wait_write_ptr) {
672 spin_lock_irqsave(&priv->lock, flags);
673 txq->need_update = 1;
674 iwl_txq_update_write_ptr(priv, txq);
675 spin_unlock_irqrestore(&priv->lock, flags);
676 }
677
678 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
679 }
680
681 return 0;
682
683 drop_unlock:
684 spin_unlock_irqrestore(&priv->lock, flags);
685 drop:
686 return -1;
687 }
688
689 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
690 #define BEACON_TIME_MASK_HIGH 0xFF000000
691 #define TIME_UNIT 1024
692
693 /*
694 * extended beacon time format
695 * time in usec will be changed into a 32-bit value in 8:24 format
696 * the high 1 byte is the beacon counts
697 * the lower 3 bytes is the time in usec within one beacon interval
698 */
699
700 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
701 {
702 u32 quot;
703 u32 rem;
704 u32 interval = beacon_interval * 1024;
705
706 if (!interval || !usec)
707 return 0;
708
709 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
710 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
711
712 return (quot << 24) + rem;
713 }
714
715 /* base is usually what we get from ucode with each received frame,
716 * the same as HW timer counter counting down
717 */
718
719 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
720 {
721 u32 base_low = base & BEACON_TIME_MASK_LOW;
722 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
723 u32 interval = beacon_interval * TIME_UNIT;
724 u32 res = (base & BEACON_TIME_MASK_HIGH) +
725 (addon & BEACON_TIME_MASK_HIGH);
726
727 if (base_low > addon_low)
728 res += base_low - addon_low;
729 else if (base_low < addon_low) {
730 res += interval + base_low - addon_low;
731 res += (1 << 24);
732 } else
733 res += (1 << 24);
734
735 return cpu_to_le32(res);
736 }
737
738 static int iwl3945_get_measurement(struct iwl_priv *priv,
739 struct ieee80211_measurement_params *params,
740 u8 type)
741 {
742 struct iwl_spectrum_cmd spectrum;
743 struct iwl_rx_packet *pkt;
744 struct iwl_host_cmd cmd = {
745 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
746 .data = (void *)&spectrum,
747 .flags = CMD_WANT_SKB,
748 };
749 u32 add_time = le64_to_cpu(params->start_time);
750 int rc;
751 int spectrum_resp_status;
752 int duration = le16_to_cpu(params->duration);
753
754 if (iwl_is_associated(priv))
755 add_time =
756 iwl3945_usecs_to_beacons(
757 le64_to_cpu(params->start_time) - priv->last_tsf,
758 le16_to_cpu(priv->rxon_timing.beacon_interval));
759
760 memset(&spectrum, 0, sizeof(spectrum));
761
762 spectrum.channel_count = cpu_to_le16(1);
763 spectrum.flags =
764 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
765 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
766 cmd.len = sizeof(spectrum);
767 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
768
769 if (iwl_is_associated(priv))
770 spectrum.start_time =
771 iwl3945_add_beacon_time(priv->last_beacon_time,
772 add_time,
773 le16_to_cpu(priv->rxon_timing.beacon_interval));
774 else
775 spectrum.start_time = 0;
776
777 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
778 spectrum.channels[0].channel = params->channel;
779 spectrum.channels[0].type = type;
780 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
781 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
782 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
783
784 rc = iwl_send_cmd_sync(priv, &cmd);
785 if (rc)
786 return rc;
787
788 pkt = (struct iwl_rx_packet *)cmd.reply_page;
789 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
790 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
791 rc = -EIO;
792 }
793
794 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
795 switch (spectrum_resp_status) {
796 case 0: /* Command will be handled */
797 if (pkt->u.spectrum.id != 0xff) {
798 IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
799 pkt->u.spectrum.id);
800 priv->measurement_status &= ~MEASUREMENT_READY;
801 }
802 priv->measurement_status |= MEASUREMENT_ACTIVE;
803 rc = 0;
804 break;
805
806 case 1: /* Command will not be handled */
807 rc = -EAGAIN;
808 break;
809 }
810
811 iwl_free_pages(priv, cmd.reply_page);
812
813 return rc;
814 }
815
816 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
817 struct iwl_rx_mem_buffer *rxb)
818 {
819 struct iwl_rx_packet *pkt = rxb_addr(rxb);
820 struct iwl_alive_resp *palive;
821 struct delayed_work *pwork;
822
823 palive = &pkt->u.alive_frame;
824
825 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
826 "0x%01X 0x%01X\n",
827 palive->is_valid, palive->ver_type,
828 palive->ver_subtype);
829
830 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
831 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
832 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
833 sizeof(struct iwl_alive_resp));
834 pwork = &priv->init_alive_start;
835 } else {
836 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
837 memcpy(&priv->card_alive, &pkt->u.alive_frame,
838 sizeof(struct iwl_alive_resp));
839 pwork = &priv->alive_start;
840 iwl3945_disable_events(priv);
841 }
842
843 /* We delay the ALIVE response by 5ms to
844 * give the HW RF Kill time to activate... */
845 if (palive->is_valid == UCODE_VALID_OK)
846 queue_delayed_work(priv->workqueue, pwork,
847 msecs_to_jiffies(5));
848 else
849 IWL_WARN(priv, "uCode did not respond OK.\n");
850 }
851
852 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
853 struct iwl_rx_mem_buffer *rxb)
854 {
855 #ifdef CONFIG_IWLWIFI_DEBUG
856 struct iwl_rx_packet *pkt = rxb_addr(rxb);
857 #endif
858
859 IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
860 return;
861 }
862
863 static void iwl3945_bg_beacon_update(struct work_struct *work)
864 {
865 struct iwl_priv *priv =
866 container_of(work, struct iwl_priv, beacon_update);
867 struct sk_buff *beacon;
868
869 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
870 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
871
872 if (!beacon) {
873 IWL_ERR(priv, "update beacon failed\n");
874 return;
875 }
876
877 mutex_lock(&priv->mutex);
878 /* new beacon skb is allocated every time; dispose previous.*/
879 if (priv->ibss_beacon)
880 dev_kfree_skb(priv->ibss_beacon);
881
882 priv->ibss_beacon = beacon;
883 mutex_unlock(&priv->mutex);
884
885 iwl3945_send_beacon_cmd(priv);
886 }
887
888 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
889 struct iwl_rx_mem_buffer *rxb)
890 {
891 #ifdef CONFIG_IWLWIFI_DEBUG
892 struct iwl_rx_packet *pkt = rxb_addr(rxb);
893 struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
894 u8 rate = beacon->beacon_notify_hdr.rate;
895
896 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
897 "tsf %d %d rate %d\n",
898 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
899 beacon->beacon_notify_hdr.failure_frame,
900 le32_to_cpu(beacon->ibss_mgr_status),
901 le32_to_cpu(beacon->high_tsf),
902 le32_to_cpu(beacon->low_tsf), rate);
903 #endif
904
905 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
906 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
907 queue_work(priv->workqueue, &priv->beacon_update);
908 }
909
910 /* Handle notification from uCode that card's power state is changing
911 * due to software, hardware, or critical temperature RFKILL */
912 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
913 struct iwl_rx_mem_buffer *rxb)
914 {
915 struct iwl_rx_packet *pkt = rxb_addr(rxb);
916 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
917 unsigned long status = priv->status;
918
919 IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
920 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
921 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
922
923 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
924 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
925
926 if (flags & HW_CARD_DISABLED)
927 set_bit(STATUS_RF_KILL_HW, &priv->status);
928 else
929 clear_bit(STATUS_RF_KILL_HW, &priv->status);
930
931
932 iwl_scan_cancel(priv);
933
934 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
935 test_bit(STATUS_RF_KILL_HW, &priv->status)))
936 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
937 test_bit(STATUS_RF_KILL_HW, &priv->status));
938 else
939 wake_up_interruptible(&priv->wait_command_queue);
940 }
941
942 /**
943 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
944 *
945 * Setup the RX handlers for each of the reply types sent from the uCode
946 * to the host.
947 *
948 * This function chains into the hardware specific files for them to setup
949 * any hardware specific handlers as well.
950 */
951 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
952 {
953 priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
954 priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
955 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
956 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
957 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
958 iwl_rx_spectrum_measure_notif;
959 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
960 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
961 iwl_rx_pm_debug_statistics_notif;
962 priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
963
964 /*
965 * The same handler is used for both the REPLY to a discrete
966 * statistics request from the host as well as for the periodic
967 * statistics notifications (after received beacons) from the uCode.
968 */
969 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
970 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
971
972 iwl_setup_rx_scan_handlers(priv);
973 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
974
975 /* Set up hardware specific Rx handlers */
976 iwl3945_hw_rx_handler_setup(priv);
977 }
978
979 /************************** RX-FUNCTIONS ****************************/
980 /*
981 * Rx theory of operation
982 *
983 * The host allocates 32 DMA target addresses and passes the host address
984 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
985 * 0 to 31
986 *
987 * Rx Queue Indexes
988 * The host/firmware share two index registers for managing the Rx buffers.
989 *
990 * The READ index maps to the first position that the firmware may be writing
991 * to -- the driver can read up to (but not including) this position and get
992 * good data.
993 * The READ index is managed by the firmware once the card is enabled.
994 *
995 * The WRITE index maps to the last position the driver has read from -- the
996 * position preceding WRITE is the last slot the firmware can place a packet.
997 *
998 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
999 * WRITE = READ.
1000 *
1001 * During initialization, the host sets up the READ queue position to the first
1002 * INDEX position, and WRITE to the last (READ - 1 wrapped)
1003 *
1004 * When the firmware places a packet in a buffer, it will advance the READ index
1005 * and fire the RX interrupt. The driver can then query the READ index and
1006 * process as many packets as possible, moving the WRITE index forward as it
1007 * resets the Rx queue buffers with new memory.
1008 *
1009 * The management in the driver is as follows:
1010 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
1011 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1012 * to replenish the iwl->rxq->rx_free.
1013 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1014 * iwl->rxq is replenished and the READ INDEX is updated (updating the
1015 * 'processed' and 'read' driver indexes as well)
1016 * + A received packet is processed and handed to the kernel network stack,
1017 * detached from the iwl->rxq. The driver 'processed' index is updated.
1018 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1019 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1020 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
1021 * were enough free buffers and RX_STALLED is set it is cleared.
1022 *
1023 *
1024 * Driver sequence:
1025 *
1026 * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
1027 * iwl3945_rx_queue_restock
1028 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1029 * queue, updates firmware pointers, and updates
1030 * the WRITE index. If insufficient rx_free buffers
1031 * are available, schedules iwl3945_rx_replenish
1032 *
1033 * -- enable interrupts --
1034 * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
1035 * READ INDEX, detaching the SKB from the pool.
1036 * Moves the packet buffer from queue to rx_used.
1037 * Calls iwl3945_rx_queue_restock to refill any empty
1038 * slots.
1039 * ...
1040 *
1041 */
1042
1043 /**
1044 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1045 */
1046 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1047 dma_addr_t dma_addr)
1048 {
1049 return cpu_to_le32((u32)dma_addr);
1050 }
1051
1052 /**
1053 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1054 *
1055 * If there are slots in the RX queue that need to be restocked,
1056 * and we have free pre-allocated buffers, fill the ranks as much
1057 * as we can, pulling from rx_free.
1058 *
1059 * This moves the 'write' index forward to catch up with 'processed', and
1060 * also updates the memory address in the firmware to reference the new
1061 * target buffer.
1062 */
1063 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1064 {
1065 struct iwl_rx_queue *rxq = &priv->rxq;
1066 struct list_head *element;
1067 struct iwl_rx_mem_buffer *rxb;
1068 unsigned long flags;
1069 int write;
1070
1071 spin_lock_irqsave(&rxq->lock, flags);
1072 write = rxq->write & ~0x7;
1073 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1074 /* Get next free Rx buffer, remove from free list */
1075 element = rxq->rx_free.next;
1076 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1077 list_del(element);
1078
1079 /* Point to Rx buffer via next RBD in circular buffer */
1080 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1081 rxq->queue[rxq->write] = rxb;
1082 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1083 rxq->free_count--;
1084 }
1085 spin_unlock_irqrestore(&rxq->lock, flags);
1086 /* If the pre-allocated buffer pool is dropping low, schedule to
1087 * refill it */
1088 if (rxq->free_count <= RX_LOW_WATERMARK)
1089 queue_work(priv->workqueue, &priv->rx_replenish);
1090
1091
1092 /* If we've added more space for the firmware to place data, tell it.
1093 * Increment device's write pointer in multiples of 8. */
1094 if ((rxq->write_actual != (rxq->write & ~0x7))
1095 || (abs(rxq->write - rxq->read) > 7)) {
1096 spin_lock_irqsave(&rxq->lock, flags);
1097 rxq->need_update = 1;
1098 spin_unlock_irqrestore(&rxq->lock, flags);
1099 iwl_rx_queue_update_write_ptr(priv, rxq);
1100 }
1101 }
1102
1103 /**
1104 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1105 *
1106 * When moving to rx_free an SKB is allocated for the slot.
1107 *
1108 * Also restock the Rx queue via iwl3945_rx_queue_restock.
1109 * This is called as a scheduled work item (except for during initialization)
1110 */
1111 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1112 {
1113 struct iwl_rx_queue *rxq = &priv->rxq;
1114 struct list_head *element;
1115 struct iwl_rx_mem_buffer *rxb;
1116 struct page *page;
1117 unsigned long flags;
1118 gfp_t gfp_mask = priority;
1119
1120 while (1) {
1121 spin_lock_irqsave(&rxq->lock, flags);
1122
1123 if (list_empty(&rxq->rx_used)) {
1124 spin_unlock_irqrestore(&rxq->lock, flags);
1125 return;
1126 }
1127 spin_unlock_irqrestore(&rxq->lock, flags);
1128
1129 if (rxq->free_count > RX_LOW_WATERMARK)
1130 gfp_mask |= __GFP_NOWARN;
1131
1132 if (priv->hw_params.rx_page_order > 0)
1133 gfp_mask |= __GFP_COMP;
1134
1135 /* Alloc a new receive buffer */
1136 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1137 if (!page) {
1138 if (net_ratelimit())
1139 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1140 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1141 net_ratelimit())
1142 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1143 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
1144 rxq->free_count);
1145 /* We don't reschedule replenish work here -- we will
1146 * call the restock method and if it still needs
1147 * more buffers it will schedule replenish */
1148 break;
1149 }
1150
1151 spin_lock_irqsave(&rxq->lock, flags);
1152 if (list_empty(&rxq->rx_used)) {
1153 spin_unlock_irqrestore(&rxq->lock, flags);
1154 __free_pages(page, priv->hw_params.rx_page_order);
1155 return;
1156 }
1157 element = rxq->rx_used.next;
1158 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1159 list_del(element);
1160 spin_unlock_irqrestore(&rxq->lock, flags);
1161
1162 rxb->page = page;
1163 /* Get physical address of RB/SKB */
1164 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1165 PAGE_SIZE << priv->hw_params.rx_page_order,
1166 PCI_DMA_FROMDEVICE);
1167
1168 spin_lock_irqsave(&rxq->lock, flags);
1169
1170 list_add_tail(&rxb->list, &rxq->rx_free);
1171 rxq->free_count++;
1172 priv->alloc_rxb_page++;
1173
1174 spin_unlock_irqrestore(&rxq->lock, flags);
1175 }
1176 }
1177
1178 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1179 {
1180 unsigned long flags;
1181 int i;
1182 spin_lock_irqsave(&rxq->lock, flags);
1183 INIT_LIST_HEAD(&rxq->rx_free);
1184 INIT_LIST_HEAD(&rxq->rx_used);
1185 /* Fill the rx_used queue with _all_ of the Rx buffers */
1186 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1187 /* In the reset function, these buffers may have been allocated
1188 * to an SKB, so we need to unmap and free potential storage */
1189 if (rxq->pool[i].page != NULL) {
1190 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1191 PAGE_SIZE << priv->hw_params.rx_page_order,
1192 PCI_DMA_FROMDEVICE);
1193 __iwl_free_pages(priv, rxq->pool[i].page);
1194 rxq->pool[i].page = NULL;
1195 }
1196 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1197 }
1198
1199 /* Set us so that we have processed and used all buffers, but have
1200 * not restocked the Rx queue with fresh buffers */
1201 rxq->read = rxq->write = 0;
1202 rxq->write_actual = 0;
1203 rxq->free_count = 0;
1204 spin_unlock_irqrestore(&rxq->lock, flags);
1205 }
1206
1207 void iwl3945_rx_replenish(void *data)
1208 {
1209 struct iwl_priv *priv = data;
1210 unsigned long flags;
1211
1212 iwl3945_rx_allocate(priv, GFP_KERNEL);
1213
1214 spin_lock_irqsave(&priv->lock, flags);
1215 iwl3945_rx_queue_restock(priv);
1216 spin_unlock_irqrestore(&priv->lock, flags);
1217 }
1218
1219 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1220 {
1221 iwl3945_rx_allocate(priv, GFP_ATOMIC);
1222
1223 iwl3945_rx_queue_restock(priv);
1224 }
1225
1226
1227 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1228 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1229 * This free routine walks the list of POOL entries and if SKB is set to
1230 * non NULL it is unmapped and freed
1231 */
1232 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1233 {
1234 int i;
1235 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1236 if (rxq->pool[i].page != NULL) {
1237 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1238 PAGE_SIZE << priv->hw_params.rx_page_order,
1239 PCI_DMA_FROMDEVICE);
1240 __iwl_free_pages(priv, rxq->pool[i].page);
1241 rxq->pool[i].page = NULL;
1242 }
1243 }
1244
1245 dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1246 rxq->dma_addr);
1247 dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1248 rxq->rb_stts, rxq->rb_stts_dma);
1249 rxq->bd = NULL;
1250 rxq->rb_stts = NULL;
1251 }
1252
1253
1254 /* Convert linear signal-to-noise ratio into dB */
1255 static u8 ratio2dB[100] = {
1256 /* 0 1 2 3 4 5 6 7 8 9 */
1257 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1258 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1259 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1260 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1261 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1262 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1263 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1264 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1265 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1266 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1267 };
1268
1269 /* Calculates a relative dB value from a ratio of linear
1270 * (i.e. not dB) signal levels.
1271 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1272 int iwl3945_calc_db_from_ratio(int sig_ratio)
1273 {
1274 /* 1000:1 or higher just report as 60 dB */
1275 if (sig_ratio >= 1000)
1276 return 60;
1277
1278 /* 100:1 or higher, divide by 10 and use table,
1279 * add 20 dB to make up for divide by 10 */
1280 if (sig_ratio >= 100)
1281 return 20 + (int)ratio2dB[sig_ratio/10];
1282
1283 /* We shouldn't see this */
1284 if (sig_ratio < 1)
1285 return 0;
1286
1287 /* Use table for ratios 1:1 - 99:1 */
1288 return (int)ratio2dB[sig_ratio];
1289 }
1290
1291 /**
1292 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1293 *
1294 * Uses the priv->rx_handlers callback function array to invoke
1295 * the appropriate handlers, including command responses,
1296 * frame-received notifications, and other notifications.
1297 */
1298 static void iwl3945_rx_handle(struct iwl_priv *priv)
1299 {
1300 struct iwl_rx_mem_buffer *rxb;
1301 struct iwl_rx_packet *pkt;
1302 struct iwl_rx_queue *rxq = &priv->rxq;
1303 u32 r, i;
1304 int reclaim;
1305 unsigned long flags;
1306 u8 fill_rx = 0;
1307 u32 count = 8;
1308 int total_empty = 0;
1309
1310 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1311 * buffer that the driver may process (last buffer filled by ucode). */
1312 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1313 i = rxq->read;
1314
1315 /* calculate total frames need to be restock after handling RX */
1316 total_empty = r - rxq->write_actual;
1317 if (total_empty < 0)
1318 total_empty += RX_QUEUE_SIZE;
1319
1320 if (total_empty > (RX_QUEUE_SIZE / 2))
1321 fill_rx = 1;
1322 /* Rx interrupt, but nothing sent from uCode */
1323 if (i == r)
1324 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1325
1326 while (i != r) {
1327 rxb = rxq->queue[i];
1328
1329 /* If an RXB doesn't have a Rx queue slot associated with it,
1330 * then a bug has been introduced in the queue refilling
1331 * routines -- catch it here */
1332 BUG_ON(rxb == NULL);
1333
1334 rxq->queue[i] = NULL;
1335
1336 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1337 PAGE_SIZE << priv->hw_params.rx_page_order,
1338 PCI_DMA_FROMDEVICE);
1339 pkt = rxb_addr(rxb);
1340
1341 trace_iwlwifi_dev_rx(priv, pkt,
1342 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1343
1344 /* Reclaim a command buffer only if this packet is a response
1345 * to a (driver-originated) command.
1346 * If the packet (e.g. Rx frame) originated from uCode,
1347 * there is no command buffer to reclaim.
1348 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1349 * but apparently a few don't get set; catch them here. */
1350 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1351 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1352 (pkt->hdr.cmd != REPLY_TX);
1353
1354 /* Based on type of command response or notification,
1355 * handle those that need handling via function in
1356 * rx_handlers table. See iwl3945_setup_rx_handlers() */
1357 if (priv->rx_handlers[pkt->hdr.cmd]) {
1358 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1359 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1360 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1361 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1362 } else {
1363 /* No handling needed */
1364 IWL_DEBUG_RX(priv,
1365 "r %d i %d No handler needed for %s, 0x%02x\n",
1366 r, i, get_cmd_string(pkt->hdr.cmd),
1367 pkt->hdr.cmd);
1368 }
1369
1370 /*
1371 * XXX: After here, we should always check rxb->page
1372 * against NULL before touching it or its virtual
1373 * memory (pkt). Because some rx_handler might have
1374 * already taken or freed the pages.
1375 */
1376
1377 if (reclaim) {
1378 /* Invoke any callbacks, transfer the buffer to caller,
1379 * and fire off the (possibly) blocking iwl_send_cmd()
1380 * as we reclaim the driver command queue */
1381 if (rxb->page)
1382 iwl_tx_cmd_complete(priv, rxb);
1383 else
1384 IWL_WARN(priv, "Claim null rxb?\n");
1385 }
1386
1387 /* Reuse the page if possible. For notification packets and
1388 * SKBs that fail to Rx correctly, add them back into the
1389 * rx_free list for reuse later. */
1390 spin_lock_irqsave(&rxq->lock, flags);
1391 if (rxb->page != NULL) {
1392 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1393 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1394 PCI_DMA_FROMDEVICE);
1395 list_add_tail(&rxb->list, &rxq->rx_free);
1396 rxq->free_count++;
1397 } else
1398 list_add_tail(&rxb->list, &rxq->rx_used);
1399
1400 spin_unlock_irqrestore(&rxq->lock, flags);
1401
1402 i = (i + 1) & RX_QUEUE_MASK;
1403 /* If there are a lot of unused frames,
1404 * restock the Rx queue so ucode won't assert. */
1405 if (fill_rx) {
1406 count++;
1407 if (count >= 8) {
1408 rxq->read = i;
1409 iwl3945_rx_replenish_now(priv);
1410 count = 0;
1411 }
1412 }
1413 }
1414
1415 /* Backtrack one entry */
1416 rxq->read = i;
1417 if (fill_rx)
1418 iwl3945_rx_replenish_now(priv);
1419 else
1420 iwl3945_rx_queue_restock(priv);
1421 }
1422
1423 /* call this function to flush any scheduled tasklet */
1424 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1425 {
1426 /* wait to make sure we flush pending tasklet*/
1427 synchronize_irq(priv->pci_dev->irq);
1428 tasklet_kill(&priv->irq_tasklet);
1429 }
1430
1431 static const char *desc_lookup(int i)
1432 {
1433 switch (i) {
1434 case 1:
1435 return "FAIL";
1436 case 2:
1437 return "BAD_PARAM";
1438 case 3:
1439 return "BAD_CHECKSUM";
1440 case 4:
1441 return "NMI_INTERRUPT";
1442 case 5:
1443 return "SYSASSERT";
1444 case 6:
1445 return "FATAL_ERROR";
1446 }
1447
1448 return "UNKNOWN";
1449 }
1450
1451 #define ERROR_START_OFFSET (1 * sizeof(u32))
1452 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1453
1454 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1455 {
1456 u32 i;
1457 u32 desc, time, count, base, data1;
1458 u32 blink1, blink2, ilink1, ilink2;
1459
1460 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1461
1462 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1463 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1464 return;
1465 }
1466
1467
1468 count = iwl_read_targ_mem(priv, base);
1469
1470 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1471 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1472 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1473 priv->status, count);
1474 }
1475
1476 IWL_ERR(priv, "Desc Time asrtPC blink2 "
1477 "ilink1 nmiPC Line\n");
1478 for (i = ERROR_START_OFFSET;
1479 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1480 i += ERROR_ELEM_SIZE) {
1481 desc = iwl_read_targ_mem(priv, base + i);
1482 time =
1483 iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1484 blink1 =
1485 iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1486 blink2 =
1487 iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1488 ilink1 =
1489 iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1490 ilink2 =
1491 iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1492 data1 =
1493 iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1494
1495 IWL_ERR(priv,
1496 "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1497 desc_lookup(desc), desc, time, blink1, blink2,
1498 ilink1, ilink2, data1);
1499 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1500 0, blink1, blink2, ilink1, ilink2);
1501 }
1502 }
1503
1504 #define EVENT_START_OFFSET (6 * sizeof(u32))
1505
1506 /**
1507 * iwl3945_print_event_log - Dump error event log to syslog
1508 *
1509 */
1510 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1511 u32 num_events, u32 mode,
1512 int pos, char **buf, size_t bufsz)
1513 {
1514 u32 i;
1515 u32 base; /* SRAM byte address of event log header */
1516 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1517 u32 ptr; /* SRAM byte address of log data */
1518 u32 ev, time, data; /* event log data */
1519 unsigned long reg_flags;
1520
1521 if (num_events == 0)
1522 return pos;
1523
1524 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1525
1526 if (mode == 0)
1527 event_size = 2 * sizeof(u32);
1528 else
1529 event_size = 3 * sizeof(u32);
1530
1531 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1532
1533 /* Make sure device is powered up for SRAM reads */
1534 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1535 iwl_grab_nic_access(priv);
1536
1537 /* Set starting address; reads will auto-increment */
1538 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1539 rmb();
1540
1541 /* "time" is actually "data" for mode 0 (no timestamp).
1542 * place event id # at far right for easier visual parsing. */
1543 for (i = 0; i < num_events; i++) {
1544 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1545 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1546 if (mode == 0) {
1547 /* data, ev */
1548 if (bufsz) {
1549 pos += scnprintf(*buf + pos, bufsz - pos,
1550 "0x%08x:%04u\n",
1551 time, ev);
1552 } else {
1553 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1554 trace_iwlwifi_dev_ucode_event(priv, 0,
1555 time, ev);
1556 }
1557 } else {
1558 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1559 if (bufsz) {
1560 pos += scnprintf(*buf + pos, bufsz - pos,
1561 "%010u:0x%08x:%04u\n",
1562 time, data, ev);
1563 } else {
1564 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1565 time, data, ev);
1566 trace_iwlwifi_dev_ucode_event(priv, time,
1567 data, ev);
1568 }
1569 }
1570 }
1571
1572 /* Allow device to power down */
1573 iwl_release_nic_access(priv);
1574 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1575 return pos;
1576 }
1577
1578 /**
1579 * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1580 */
1581 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1582 u32 num_wraps, u32 next_entry,
1583 u32 size, u32 mode,
1584 int pos, char **buf, size_t bufsz)
1585 {
1586 /*
1587 * display the newest DEFAULT_LOG_ENTRIES entries
1588 * i.e the entries just before the next ont that uCode would fill.
1589 */
1590 if (num_wraps) {
1591 if (next_entry < size) {
1592 pos = iwl3945_print_event_log(priv,
1593 capacity - (size - next_entry),
1594 size - next_entry, mode,
1595 pos, buf, bufsz);
1596 pos = iwl3945_print_event_log(priv, 0,
1597 next_entry, mode,
1598 pos, buf, bufsz);
1599 } else
1600 pos = iwl3945_print_event_log(priv, next_entry - size,
1601 size, mode,
1602 pos, buf, bufsz);
1603 } else {
1604 if (next_entry < size)
1605 pos = iwl3945_print_event_log(priv, 0,
1606 next_entry, mode,
1607 pos, buf, bufsz);
1608 else
1609 pos = iwl3945_print_event_log(priv, next_entry - size,
1610 size, mode,
1611 pos, buf, bufsz);
1612 }
1613 return pos;
1614 }
1615
1616 /* For sanity check only. Actual size is determined by uCode, typ. 512 */
1617 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1618
1619 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1620
1621 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1622 char **buf, bool display)
1623 {
1624 u32 base; /* SRAM byte address of event log header */
1625 u32 capacity; /* event log capacity in # entries */
1626 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1627 u32 num_wraps; /* # times uCode wrapped to top of log */
1628 u32 next_entry; /* index of next entry to be written by uCode */
1629 u32 size; /* # entries that we'll print */
1630 int pos = 0;
1631 size_t bufsz = 0;
1632
1633 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1634 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1635 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1636 return -EINVAL;
1637 }
1638
1639 /* event log header */
1640 capacity = iwl_read_targ_mem(priv, base);
1641 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1642 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1643 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1644
1645 if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1646 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1647 capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1648 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1649 }
1650
1651 if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1652 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1653 next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1654 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1655 }
1656
1657 size = num_wraps ? capacity : next_entry;
1658
1659 /* bail out if nothing in log */
1660 if (size == 0) {
1661 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1662 return pos;
1663 }
1664
1665 #ifdef CONFIG_IWLWIFI_DEBUG
1666 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1667 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1668 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1669 #else
1670 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1671 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1672 #endif
1673
1674 IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1675 size);
1676
1677 #ifdef CONFIG_IWLWIFI_DEBUG
1678 if (display) {
1679 if (full_log)
1680 bufsz = capacity * 48;
1681 else
1682 bufsz = size * 48;
1683 *buf = kmalloc(bufsz, GFP_KERNEL);
1684 if (!*buf)
1685 return -ENOMEM;
1686 }
1687 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1688 /* if uCode has wrapped back to top of log,
1689 * start at the oldest entry,
1690 * i.e the next one that uCode would fill.
1691 */
1692 if (num_wraps)
1693 pos = iwl3945_print_event_log(priv, next_entry,
1694 capacity - next_entry, mode,
1695 pos, buf, bufsz);
1696
1697 /* (then/else) start at top of log */
1698 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1699 pos, buf, bufsz);
1700 } else
1701 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1702 next_entry, size, mode,
1703 pos, buf, bufsz);
1704 #else
1705 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1706 next_entry, size, mode,
1707 pos, buf, bufsz);
1708 #endif
1709 return pos;
1710 }
1711
1712 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1713 {
1714 u32 inta, handled = 0;
1715 u32 inta_fh;
1716 unsigned long flags;
1717 #ifdef CONFIG_IWLWIFI_DEBUG
1718 u32 inta_mask;
1719 #endif
1720
1721 spin_lock_irqsave(&priv->lock, flags);
1722
1723 /* Ack/clear/reset pending uCode interrupts.
1724 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1725 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1726 inta = iwl_read32(priv, CSR_INT);
1727 iwl_write32(priv, CSR_INT, inta);
1728
1729 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1730 * Any new interrupts that happen after this, either while we're
1731 * in this tasklet, or later, will show up in next ISR/tasklet. */
1732 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1733 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1734
1735 #ifdef CONFIG_IWLWIFI_DEBUG
1736 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1737 /* just for debug */
1738 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1739 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1740 inta, inta_mask, inta_fh);
1741 }
1742 #endif
1743
1744 spin_unlock_irqrestore(&priv->lock, flags);
1745
1746 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1747 * atomic, make sure that inta covers all the interrupts that
1748 * we've discovered, even if FH interrupt came in just after
1749 * reading CSR_INT. */
1750 if (inta_fh & CSR39_FH_INT_RX_MASK)
1751 inta |= CSR_INT_BIT_FH_RX;
1752 if (inta_fh & CSR39_FH_INT_TX_MASK)
1753 inta |= CSR_INT_BIT_FH_TX;
1754
1755 /* Now service all interrupt bits discovered above. */
1756 if (inta & CSR_INT_BIT_HW_ERR) {
1757 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1758
1759 /* Tell the device to stop sending interrupts */
1760 iwl_disable_interrupts(priv);
1761
1762 priv->isr_stats.hw++;
1763 iwl_irq_handle_error(priv);
1764
1765 handled |= CSR_INT_BIT_HW_ERR;
1766
1767 return;
1768 }
1769
1770 #ifdef CONFIG_IWLWIFI_DEBUG
1771 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1772 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1773 if (inta & CSR_INT_BIT_SCD) {
1774 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1775 "the frame/frames.\n");
1776 priv->isr_stats.sch++;
1777 }
1778
1779 /* Alive notification via Rx interrupt will do the real work */
1780 if (inta & CSR_INT_BIT_ALIVE) {
1781 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1782 priv->isr_stats.alive++;
1783 }
1784 }
1785 #endif
1786 /* Safely ignore these bits for debug checks below */
1787 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1788
1789 /* Error detected by uCode */
1790 if (inta & CSR_INT_BIT_SW_ERR) {
1791 IWL_ERR(priv, "Microcode SW error detected. "
1792 "Restarting 0x%X.\n", inta);
1793 priv->isr_stats.sw++;
1794 priv->isr_stats.sw_err = inta;
1795 iwl_irq_handle_error(priv);
1796 handled |= CSR_INT_BIT_SW_ERR;
1797 }
1798
1799 /* uCode wakes up after power-down sleep */
1800 if (inta & CSR_INT_BIT_WAKEUP) {
1801 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1802 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1803 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1804 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1805 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1806 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1807 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1808 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1809
1810 priv->isr_stats.wakeup++;
1811 handled |= CSR_INT_BIT_WAKEUP;
1812 }
1813
1814 /* All uCode command responses, including Tx command responses,
1815 * Rx "responses" (frame-received notification), and other
1816 * notifications from uCode come through here*/
1817 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1818 iwl3945_rx_handle(priv);
1819 priv->isr_stats.rx++;
1820 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1821 }
1822
1823 if (inta & CSR_INT_BIT_FH_TX) {
1824 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1825 priv->isr_stats.tx++;
1826
1827 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1828 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1829 (FH39_SRVC_CHNL), 0x0);
1830 handled |= CSR_INT_BIT_FH_TX;
1831 }
1832
1833 if (inta & ~handled) {
1834 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1835 priv->isr_stats.unhandled++;
1836 }
1837
1838 if (inta & ~priv->inta_mask) {
1839 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1840 inta & ~priv->inta_mask);
1841 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1842 }
1843
1844 /* Re-enable all interrupts */
1845 /* only Re-enable if disabled by irq */
1846 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1847 iwl_enable_interrupts(priv);
1848
1849 #ifdef CONFIG_IWLWIFI_DEBUG
1850 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1851 inta = iwl_read32(priv, CSR_INT);
1852 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1853 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1854 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1855 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1856 }
1857 #endif
1858 }
1859
1860 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1861 enum ieee80211_band band,
1862 u8 is_active, u8 n_probes,
1863 struct iwl3945_scan_channel *scan_ch)
1864 {
1865 struct ieee80211_channel *chan;
1866 const struct ieee80211_supported_band *sband;
1867 const struct iwl_channel_info *ch_info;
1868 u16 passive_dwell = 0;
1869 u16 active_dwell = 0;
1870 int added, i;
1871
1872 sband = iwl_get_hw_mode(priv, band);
1873 if (!sband)
1874 return 0;
1875
1876 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1877 passive_dwell = iwl_get_passive_dwell_time(priv, band);
1878
1879 if (passive_dwell <= active_dwell)
1880 passive_dwell = active_dwell + 1;
1881
1882 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1883 chan = priv->scan_request->channels[i];
1884
1885 if (chan->band != band)
1886 continue;
1887
1888 scan_ch->channel = chan->hw_value;
1889
1890 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1891 if (!is_channel_valid(ch_info)) {
1892 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1893 scan_ch->channel);
1894 continue;
1895 }
1896
1897 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1898 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1899 /* If passive , set up for auto-switch
1900 * and use long active_dwell time.
1901 */
1902 if (!is_active || is_channel_passive(ch_info) ||
1903 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1904 scan_ch->type = 0; /* passive */
1905 if (IWL_UCODE_API(priv->ucode_ver) == 1)
1906 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1907 } else {
1908 scan_ch->type = 1; /* active */
1909 }
1910
1911 /* Set direct probe bits. These may be used both for active
1912 * scan channels (probes gets sent right away),
1913 * or for passive channels (probes get se sent only after
1914 * hearing clear Rx packet).*/
1915 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1916 if (n_probes)
1917 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1918 } else {
1919 /* uCode v1 does not allow setting direct probe bits on
1920 * passive channel. */
1921 if ((scan_ch->type & 1) && n_probes)
1922 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1923 }
1924
1925 /* Set txpower levels to defaults */
1926 scan_ch->tpc.dsp_atten = 110;
1927 /* scan_pwr_info->tpc.dsp_atten; */
1928
1929 /*scan_pwr_info->tpc.tx_gain; */
1930 if (band == IEEE80211_BAND_5GHZ)
1931 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1932 else {
1933 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1934 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1935 * power level:
1936 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1937 */
1938 }
1939
1940 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1941 scan_ch->channel,
1942 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1943 (scan_ch->type & 1) ?
1944 active_dwell : passive_dwell);
1945
1946 scan_ch++;
1947 added++;
1948 }
1949
1950 IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1951 return added;
1952 }
1953
1954 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1955 struct ieee80211_rate *rates)
1956 {
1957 int i;
1958
1959 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1960 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1961 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1962 rates[i].hw_value_short = i;
1963 rates[i].flags = 0;
1964 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1965 /*
1966 * If CCK != 1M then set short preamble rate flag.
1967 */
1968 rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1969 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1970 }
1971 }
1972 }
1973
1974 /******************************************************************************
1975 *
1976 * uCode download functions
1977 *
1978 ******************************************************************************/
1979
1980 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1981 {
1982 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1983 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1984 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1985 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1986 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1987 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1988 }
1989
1990 /**
1991 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1992 * looking at all data.
1993 */
1994 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1995 {
1996 u32 val;
1997 u32 save_len = len;
1998 int rc = 0;
1999 u32 errcnt;
2000
2001 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2002
2003 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2004 IWL39_RTC_INST_LOWER_BOUND);
2005
2006 errcnt = 0;
2007 for (; len > 0; len -= sizeof(u32), image++) {
2008 /* read data comes through single port, auto-incr addr */
2009 /* NOTE: Use the debugless read so we don't flood kernel log
2010 * if IWL_DL_IO is set */
2011 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2012 if (val != le32_to_cpu(*image)) {
2013 IWL_ERR(priv, "uCode INST section is invalid at "
2014 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2015 save_len - len, val, le32_to_cpu(*image));
2016 rc = -EIO;
2017 errcnt++;
2018 if (errcnt >= 20)
2019 break;
2020 }
2021 }
2022
2023
2024 if (!errcnt)
2025 IWL_DEBUG_INFO(priv,
2026 "ucode image in INSTRUCTION memory is good\n");
2027
2028 return rc;
2029 }
2030
2031
2032 /**
2033 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2034 * using sample data 100 bytes apart. If these sample points are good,
2035 * it's a pretty good bet that everything between them is good, too.
2036 */
2037 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2038 {
2039 u32 val;
2040 int rc = 0;
2041 u32 errcnt = 0;
2042 u32 i;
2043
2044 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2045
2046 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2047 /* read data comes through single port, auto-incr addr */
2048 /* NOTE: Use the debugless read so we don't flood kernel log
2049 * if IWL_DL_IO is set */
2050 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2051 i + IWL39_RTC_INST_LOWER_BOUND);
2052 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2053 if (val != le32_to_cpu(*image)) {
2054 #if 0 /* Enable this if you want to see details */
2055 IWL_ERR(priv, "uCode INST section is invalid at "
2056 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2057 i, val, *image);
2058 #endif
2059 rc = -EIO;
2060 errcnt++;
2061 if (errcnt >= 3)
2062 break;
2063 }
2064 }
2065
2066 return rc;
2067 }
2068
2069
2070 /**
2071 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2072 * and verify its contents
2073 */
2074 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2075 {
2076 __le32 *image;
2077 u32 len;
2078 int rc = 0;
2079
2080 /* Try bootstrap */
2081 image = (__le32 *)priv->ucode_boot.v_addr;
2082 len = priv->ucode_boot.len;
2083 rc = iwl3945_verify_inst_sparse(priv, image, len);
2084 if (rc == 0) {
2085 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2086 return 0;
2087 }
2088
2089 /* Try initialize */
2090 image = (__le32 *)priv->ucode_init.v_addr;
2091 len = priv->ucode_init.len;
2092 rc = iwl3945_verify_inst_sparse(priv, image, len);
2093 if (rc == 0) {
2094 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2095 return 0;
2096 }
2097
2098 /* Try runtime/protocol */
2099 image = (__le32 *)priv->ucode_code.v_addr;
2100 len = priv->ucode_code.len;
2101 rc = iwl3945_verify_inst_sparse(priv, image, len);
2102 if (rc == 0) {
2103 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2104 return 0;
2105 }
2106
2107 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2108
2109 /* Since nothing seems to match, show first several data entries in
2110 * instruction SRAM, so maybe visual inspection will give a clue.
2111 * Selection of bootstrap image (vs. other images) is arbitrary. */
2112 image = (__le32 *)priv->ucode_boot.v_addr;
2113 len = priv->ucode_boot.len;
2114 rc = iwl3945_verify_inst_full(priv, image, len);
2115
2116 return rc;
2117 }
2118
2119 static void iwl3945_nic_start(struct iwl_priv *priv)
2120 {
2121 /* Remove all resets to allow NIC to operate */
2122 iwl_write32(priv, CSR_RESET, 0);
2123 }
2124
2125 /**
2126 * iwl3945_read_ucode - Read uCode images from disk file.
2127 *
2128 * Copy into buffers for card to fetch via bus-mastering
2129 */
2130 static int iwl3945_read_ucode(struct iwl_priv *priv)
2131 {
2132 const struct iwl_ucode_header *ucode;
2133 int ret = -EINVAL, index;
2134 const struct firmware *ucode_raw;
2135 /* firmware file name contains uCode/driver compatibility version */
2136 const char *name_pre = priv->cfg->fw_name_pre;
2137 const unsigned int api_max = priv->cfg->ucode_api_max;
2138 const unsigned int api_min = priv->cfg->ucode_api_min;
2139 char buf[25];
2140 u8 *src;
2141 size_t len;
2142 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2143
2144 /* Ask kernel firmware_class module to get the boot firmware off disk.
2145 * request_firmware() is synchronous, file is in memory on return. */
2146 for (index = api_max; index >= api_min; index--) {
2147 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2148 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2149 if (ret < 0) {
2150 IWL_ERR(priv, "%s firmware file req failed: %d\n",
2151 buf, ret);
2152 if (ret == -ENOENT)
2153 continue;
2154 else
2155 goto error;
2156 } else {
2157 if (index < api_max)
2158 IWL_ERR(priv, "Loaded firmware %s, "
2159 "which is deprecated. "
2160 " Please use API v%u instead.\n",
2161 buf, api_max);
2162 IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2163 "(%zd bytes) from disk\n",
2164 buf, ucode_raw->size);
2165 break;
2166 }
2167 }
2168
2169 if (ret < 0)
2170 goto error;
2171
2172 /* Make sure that we got at least our header! */
2173 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
2174 IWL_ERR(priv, "File size way too small!\n");
2175 ret = -EINVAL;
2176 goto err_release;
2177 }
2178
2179 /* Data from ucode file: header followed by uCode images */
2180 ucode = (struct iwl_ucode_header *)ucode_raw->data;
2181
2182 priv->ucode_ver = le32_to_cpu(ucode->ver);
2183 api_ver = IWL_UCODE_API(priv->ucode_ver);
2184 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2185 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2186 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2187 init_data_size =
2188 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2189 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2190 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2191
2192 /* api_ver should match the api version forming part of the
2193 * firmware filename ... but we don't check for that and only rely
2194 * on the API version read from firmware header from here on forward */
2195
2196 if (api_ver < api_min || api_ver > api_max) {
2197 IWL_ERR(priv, "Driver unable to support your firmware API. "
2198 "Driver supports v%u, firmware is v%u.\n",
2199 api_max, api_ver);
2200 priv->ucode_ver = 0;
2201 ret = -EINVAL;
2202 goto err_release;
2203 }
2204 if (api_ver != api_max)
2205 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2206 "got %u. New firmware can be obtained "
2207 "from http://www.intellinuxwireless.org.\n",
2208 api_max, api_ver);
2209
2210 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2211 IWL_UCODE_MAJOR(priv->ucode_ver),
2212 IWL_UCODE_MINOR(priv->ucode_ver),
2213 IWL_UCODE_API(priv->ucode_ver),
2214 IWL_UCODE_SERIAL(priv->ucode_ver));
2215
2216 snprintf(priv->hw->wiphy->fw_version,
2217 sizeof(priv->hw->wiphy->fw_version),
2218 "%u.%u.%u.%u",
2219 IWL_UCODE_MAJOR(priv->ucode_ver),
2220 IWL_UCODE_MINOR(priv->ucode_ver),
2221 IWL_UCODE_API(priv->ucode_ver),
2222 IWL_UCODE_SERIAL(priv->ucode_ver));
2223
2224 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2225 priv->ucode_ver);
2226 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2227 inst_size);
2228 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2229 data_size);
2230 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2231 init_size);
2232 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2233 init_data_size);
2234 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2235 boot_size);
2236
2237
2238 /* Verify size of file vs. image size info in file's header */
2239 if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2240 inst_size + data_size + init_size +
2241 init_data_size + boot_size) {
2242
2243 IWL_DEBUG_INFO(priv,
2244 "uCode file size %zd does not match expected size\n",
2245 ucode_raw->size);
2246 ret = -EINVAL;
2247 goto err_release;
2248 }
2249
2250 /* Verify that uCode images will fit in card's SRAM */
2251 if (inst_size > IWL39_MAX_INST_SIZE) {
2252 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2253 inst_size);
2254 ret = -EINVAL;
2255 goto err_release;
2256 }
2257
2258 if (data_size > IWL39_MAX_DATA_SIZE) {
2259 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2260 data_size);
2261 ret = -EINVAL;
2262 goto err_release;
2263 }
2264 if (init_size > IWL39_MAX_INST_SIZE) {
2265 IWL_DEBUG_INFO(priv,
2266 "uCode init instr len %d too large to fit in\n",
2267 init_size);
2268 ret = -EINVAL;
2269 goto err_release;
2270 }
2271 if (init_data_size > IWL39_MAX_DATA_SIZE) {
2272 IWL_DEBUG_INFO(priv,
2273 "uCode init data len %d too large to fit in\n",
2274 init_data_size);
2275 ret = -EINVAL;
2276 goto err_release;
2277 }
2278 if (boot_size > IWL39_MAX_BSM_SIZE) {
2279 IWL_DEBUG_INFO(priv,
2280 "uCode boot instr len %d too large to fit in\n",
2281 boot_size);
2282 ret = -EINVAL;
2283 goto err_release;
2284 }
2285
2286 /* Allocate ucode buffers for card's bus-master loading ... */
2287
2288 /* Runtime instructions and 2 copies of data:
2289 * 1) unmodified from disk
2290 * 2) backup cache for save/restore during power-downs */
2291 priv->ucode_code.len = inst_size;
2292 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2293
2294 priv->ucode_data.len = data_size;
2295 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2296
2297 priv->ucode_data_backup.len = data_size;
2298 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2299
2300 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2301 !priv->ucode_data_backup.v_addr)
2302 goto err_pci_alloc;
2303
2304 /* Initialization instructions and data */
2305 if (init_size && init_data_size) {
2306 priv->ucode_init.len = init_size;
2307 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2308
2309 priv->ucode_init_data.len = init_data_size;
2310 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2311
2312 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2313 goto err_pci_alloc;
2314 }
2315
2316 /* Bootstrap (instructions only, no data) */
2317 if (boot_size) {
2318 priv->ucode_boot.len = boot_size;
2319 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2320
2321 if (!priv->ucode_boot.v_addr)
2322 goto err_pci_alloc;
2323 }
2324
2325 /* Copy images into buffers for card's bus-master reads ... */
2326
2327 /* Runtime instructions (first block of data in file) */
2328 len = inst_size;
2329 IWL_DEBUG_INFO(priv,
2330 "Copying (but not loading) uCode instr len %zd\n", len);
2331 memcpy(priv->ucode_code.v_addr, src, len);
2332 src += len;
2333
2334 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2335 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2336
2337 /* Runtime data (2nd block)
2338 * NOTE: Copy into backup buffer will be done in iwl3945_up() */
2339 len = data_size;
2340 IWL_DEBUG_INFO(priv,
2341 "Copying (but not loading) uCode data len %zd\n", len);
2342 memcpy(priv->ucode_data.v_addr, src, len);
2343 memcpy(priv->ucode_data_backup.v_addr, src, len);
2344 src += len;
2345
2346 /* Initialization instructions (3rd block) */
2347 if (init_size) {
2348 len = init_size;
2349 IWL_DEBUG_INFO(priv,
2350 "Copying (but not loading) init instr len %zd\n", len);
2351 memcpy(priv->ucode_init.v_addr, src, len);
2352 src += len;
2353 }
2354
2355 /* Initialization data (4th block) */
2356 if (init_data_size) {
2357 len = init_data_size;
2358 IWL_DEBUG_INFO(priv,
2359 "Copying (but not loading) init data len %zd\n", len);
2360 memcpy(priv->ucode_init_data.v_addr, src, len);
2361 src += len;
2362 }
2363
2364 /* Bootstrap instructions (5th block) */
2365 len = boot_size;
2366 IWL_DEBUG_INFO(priv,
2367 "Copying (but not loading) boot instr len %zd\n", len);
2368 memcpy(priv->ucode_boot.v_addr, src, len);
2369
2370 /* We have our copies now, allow OS release its copies */
2371 release_firmware(ucode_raw);
2372 return 0;
2373
2374 err_pci_alloc:
2375 IWL_ERR(priv, "failed to allocate pci memory\n");
2376 ret = -ENOMEM;
2377 iwl3945_dealloc_ucode_pci(priv);
2378
2379 err_release:
2380 release_firmware(ucode_raw);
2381
2382 error:
2383 return ret;
2384 }
2385
2386
2387 /**
2388 * iwl3945_set_ucode_ptrs - Set uCode address location
2389 *
2390 * Tell initialization uCode where to find runtime uCode.
2391 *
2392 * BSM registers initially contain pointers to initialization uCode.
2393 * We need to replace them to load runtime uCode inst and data,
2394 * and to save runtime data when powering down.
2395 */
2396 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2397 {
2398 dma_addr_t pinst;
2399 dma_addr_t pdata;
2400
2401 /* bits 31:0 for 3945 */
2402 pinst = priv->ucode_code.p_addr;
2403 pdata = priv->ucode_data_backup.p_addr;
2404
2405 /* Tell bootstrap uCode where to find image to load */
2406 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2407 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2408 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2409 priv->ucode_data.len);
2410
2411 /* Inst byte count must be last to set up, bit 31 signals uCode
2412 * that all new ptr/size info is in place */
2413 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2414 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2415
2416 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2417
2418 return 0;
2419 }
2420
2421 /**
2422 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2423 *
2424 * Called after REPLY_ALIVE notification received from "initialize" uCode.
2425 *
2426 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2427 */
2428 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2429 {
2430 /* Check alive response for "valid" sign from uCode */
2431 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2432 /* We had an error bringing up the hardware, so take it
2433 * all the way back down so we can try again */
2434 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2435 goto restart;
2436 }
2437
2438 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2439 * This is a paranoid check, because we would not have gotten the
2440 * "initialize" alive if code weren't properly loaded. */
2441 if (iwl3945_verify_ucode(priv)) {
2442 /* Runtime instruction load was bad;
2443 * take it all the way back down so we can try again */
2444 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2445 goto restart;
2446 }
2447
2448 /* Send pointers to protocol/runtime uCode image ... init code will
2449 * load and launch runtime uCode, which will send us another "Alive"
2450 * notification. */
2451 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2452 if (iwl3945_set_ucode_ptrs(priv)) {
2453 /* Runtime instruction load won't happen;
2454 * take it all the way back down so we can try again */
2455 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2456 goto restart;
2457 }
2458 return;
2459
2460 restart:
2461 queue_work(priv->workqueue, &priv->restart);
2462 }
2463
2464 /**
2465 * iwl3945_alive_start - called after REPLY_ALIVE notification received
2466 * from protocol/runtime uCode (initialization uCode's
2467 * Alive gets handled by iwl3945_init_alive_start()).
2468 */
2469 static void iwl3945_alive_start(struct iwl_priv *priv)
2470 {
2471 int thermal_spin = 0;
2472 u32 rfkill;
2473
2474 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2475
2476 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2477 /* We had an error bringing up the hardware, so take it
2478 * all the way back down so we can try again */
2479 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2480 goto restart;
2481 }
2482
2483 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2484 * This is a paranoid check, because we would not have gotten the
2485 * "runtime" alive if code weren't properly loaded. */
2486 if (iwl3945_verify_ucode(priv)) {
2487 /* Runtime instruction load was bad;
2488 * take it all the way back down so we can try again */
2489 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2490 goto restart;
2491 }
2492
2493 iwl_clear_stations_table(priv);
2494
2495 rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2496 IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2497
2498 if (rfkill & 0x1) {
2499 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2500 /* if RFKILL is not on, then wait for thermal
2501 * sensor in adapter to kick in */
2502 while (iwl3945_hw_get_temperature(priv) == 0) {
2503 thermal_spin++;
2504 udelay(10);
2505 }
2506
2507 if (thermal_spin)
2508 IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2509 thermal_spin * 10);
2510 } else
2511 set_bit(STATUS_RF_KILL_HW, &priv->status);
2512
2513 /* After the ALIVE response, we can send commands to 3945 uCode */
2514 set_bit(STATUS_ALIVE, &priv->status);
2515
2516 if (iwl_is_rfkill(priv))
2517 return;
2518
2519 ieee80211_wake_queues(priv->hw);
2520
2521 priv->active_rate = priv->rates_mask;
2522 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2523
2524 iwl_power_update_mode(priv, true);
2525
2526 if (iwl_is_associated(priv)) {
2527 struct iwl3945_rxon_cmd *active_rxon =
2528 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2529
2530 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2531 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2532 } else {
2533 /* Initialize our rx_config data */
2534 iwl_connection_init_rx_config(priv, priv->iw_mode);
2535 }
2536
2537 /* Configure Bluetooth device coexistence support */
2538 iwl_send_bt_config(priv);
2539
2540 /* Configure the adapter for unassociated operation */
2541 iwlcore_commit_rxon(priv);
2542
2543 iwl3945_reg_txpower_periodic(priv);
2544
2545 iwl_leds_init(priv);
2546
2547 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2548 set_bit(STATUS_READY, &priv->status);
2549 wake_up_interruptible(&priv->wait_command_queue);
2550
2551 /* reassociate for ADHOC mode */
2552 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2553 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2554 priv->vif);
2555 if (beacon)
2556 iwl_mac_beacon_update(priv->hw, beacon);
2557 }
2558
2559 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2560 iwl_set_mode(priv, priv->iw_mode);
2561
2562 return;
2563
2564 restart:
2565 queue_work(priv->workqueue, &priv->restart);
2566 }
2567
2568 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2569
2570 static void __iwl3945_down(struct iwl_priv *priv)
2571 {
2572 unsigned long flags;
2573 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2574 struct ieee80211_conf *conf = NULL;
2575
2576 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2577
2578 conf = ieee80211_get_hw_conf(priv->hw);
2579
2580 if (!exit_pending)
2581 set_bit(STATUS_EXIT_PENDING, &priv->status);
2582
2583 iwl_clear_stations_table(priv);
2584
2585 /* Unblock any waiting calls */
2586 wake_up_interruptible_all(&priv->wait_command_queue);
2587
2588 /* Wipe out the EXIT_PENDING status bit if we are not actually
2589 * exiting the module */
2590 if (!exit_pending)
2591 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2592
2593 /* stop and reset the on-board processor */
2594 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2595
2596 /* tell the device to stop sending interrupts */
2597 spin_lock_irqsave(&priv->lock, flags);
2598 iwl_disable_interrupts(priv);
2599 spin_unlock_irqrestore(&priv->lock, flags);
2600 iwl_synchronize_irq(priv);
2601
2602 if (priv->mac80211_registered)
2603 ieee80211_stop_queues(priv->hw);
2604
2605 /* If we have not previously called iwl3945_init() then
2606 * clear all bits but the RF Kill bits and return */
2607 if (!iwl_is_init(priv)) {
2608 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2609 STATUS_RF_KILL_HW |
2610 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2611 STATUS_GEO_CONFIGURED |
2612 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2613 STATUS_EXIT_PENDING;
2614 goto exit;
2615 }
2616
2617 /* ...otherwise clear out all the status bits but the RF Kill
2618 * bit and continue taking the NIC down. */
2619 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2620 STATUS_RF_KILL_HW |
2621 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2622 STATUS_GEO_CONFIGURED |
2623 test_bit(STATUS_FW_ERROR, &priv->status) <<
2624 STATUS_FW_ERROR |
2625 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2626 STATUS_EXIT_PENDING;
2627
2628 iwl3945_hw_txq_ctx_stop(priv);
2629 iwl3945_hw_rxq_stop(priv);
2630
2631 /* Power-down device's busmaster DMA clocks */
2632 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2633 udelay(5);
2634
2635 /* Stop the device, and put it in low power state */
2636 priv->cfg->ops->lib->apm_ops.stop(priv);
2637
2638 exit:
2639 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2640
2641 if (priv->ibss_beacon)
2642 dev_kfree_skb(priv->ibss_beacon);
2643 priv->ibss_beacon = NULL;
2644
2645 /* clear out any free frames */
2646 iwl3945_clear_free_frames(priv);
2647 }
2648
2649 static void iwl3945_down(struct iwl_priv *priv)
2650 {
2651 mutex_lock(&priv->mutex);
2652 __iwl3945_down(priv);
2653 mutex_unlock(&priv->mutex);
2654
2655 iwl3945_cancel_deferred_work(priv);
2656 }
2657
2658 #define MAX_HW_RESTARTS 5
2659
2660 static int __iwl3945_up(struct iwl_priv *priv)
2661 {
2662 int rc, i;
2663
2664 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2665 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2666 return -EIO;
2667 }
2668
2669 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2670 IWL_ERR(priv, "ucode not available for device bring up\n");
2671 return -EIO;
2672 }
2673
2674 /* If platform's RF_KILL switch is NOT set to KILL */
2675 if (iwl_read32(priv, CSR_GP_CNTRL) &
2676 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2677 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2678 else {
2679 set_bit(STATUS_RF_KILL_HW, &priv->status);
2680 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2681 return -ENODEV;
2682 }
2683
2684 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2685
2686 rc = iwl3945_hw_nic_init(priv);
2687 if (rc) {
2688 IWL_ERR(priv, "Unable to int nic\n");
2689 return rc;
2690 }
2691
2692 /* make sure rfkill handshake bits are cleared */
2693 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2694 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2695 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2696
2697 /* clear (again), then enable host interrupts */
2698 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2699 iwl_enable_interrupts(priv);
2700
2701 /* really make sure rfkill handshake bits are cleared */
2702 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2703 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2704
2705 /* Copy original ucode data image from disk into backup cache.
2706 * This will be used to initialize the on-board processor's
2707 * data SRAM for a clean start when the runtime program first loads. */
2708 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2709 priv->ucode_data.len);
2710
2711 /* We return success when we resume from suspend and rf_kill is on. */
2712 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2713 return 0;
2714
2715 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2716
2717 iwl_clear_stations_table(priv);
2718
2719 /* load bootstrap state machine,
2720 * load bootstrap program into processor's memory,
2721 * prepare to load the "initialize" uCode */
2722 priv->cfg->ops->lib->load_ucode(priv);
2723
2724 if (rc) {
2725 IWL_ERR(priv,
2726 "Unable to set up bootstrap uCode: %d\n", rc);
2727 continue;
2728 }
2729
2730 /* start card; "initialize" will load runtime ucode */
2731 iwl3945_nic_start(priv);
2732
2733 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2734
2735 return 0;
2736 }
2737
2738 set_bit(STATUS_EXIT_PENDING, &priv->status);
2739 __iwl3945_down(priv);
2740 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2741
2742 /* tried to restart and config the device for as long as our
2743 * patience could withstand */
2744 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2745 return -EIO;
2746 }
2747
2748
2749 /*****************************************************************************
2750 *
2751 * Workqueue callbacks
2752 *
2753 *****************************************************************************/
2754
2755 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2756 {
2757 struct iwl_priv *priv =
2758 container_of(data, struct iwl_priv, init_alive_start.work);
2759
2760 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2761 return;
2762
2763 mutex_lock(&priv->mutex);
2764 iwl3945_init_alive_start(priv);
2765 mutex_unlock(&priv->mutex);
2766 }
2767
2768 static void iwl3945_bg_alive_start(struct work_struct *data)
2769 {
2770 struct iwl_priv *priv =
2771 container_of(data, struct iwl_priv, alive_start.work);
2772
2773 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2774 return;
2775
2776 mutex_lock(&priv->mutex);
2777 iwl3945_alive_start(priv);
2778 mutex_unlock(&priv->mutex);
2779 }
2780
2781 /*
2782 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2783 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2784 * *is* readable even when device has been SW_RESET into low power mode
2785 * (e.g. during RF KILL).
2786 */
2787 static void iwl3945_rfkill_poll(struct work_struct *data)
2788 {
2789 struct iwl_priv *priv =
2790 container_of(data, struct iwl_priv, rfkill_poll.work);
2791 bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2792 bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2793 & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2794
2795 if (new_rfkill != old_rfkill) {
2796 if (new_rfkill)
2797 set_bit(STATUS_RF_KILL_HW, &priv->status);
2798 else
2799 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2800
2801 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2802
2803 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2804 new_rfkill ? "disable radio" : "enable radio");
2805 }
2806
2807 /* Keep this running, even if radio now enabled. This will be
2808 * cancelled in mac_start() if system decides to start again */
2809 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2810 round_jiffies_relative(2 * HZ));
2811
2812 }
2813
2814 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2815 static void iwl3945_bg_request_scan(struct work_struct *data)
2816 {
2817 struct iwl_priv *priv =
2818 container_of(data, struct iwl_priv, request_scan);
2819 struct iwl_host_cmd cmd = {
2820 .id = REPLY_SCAN_CMD,
2821 .len = sizeof(struct iwl3945_scan_cmd),
2822 .flags = CMD_SIZE_HUGE,
2823 };
2824 int rc = 0;
2825 struct iwl3945_scan_cmd *scan;
2826 struct ieee80211_conf *conf = NULL;
2827 u8 n_probes = 0;
2828 enum ieee80211_band band;
2829 bool is_active = false;
2830
2831 conf = ieee80211_get_hw_conf(priv->hw);
2832
2833 mutex_lock(&priv->mutex);
2834
2835 cancel_delayed_work(&priv->scan_check);
2836
2837 if (!iwl_is_ready(priv)) {
2838 IWL_WARN(priv, "request scan called when driver not ready.\n");
2839 goto done;
2840 }
2841
2842 /* Make sure the scan wasn't canceled before this queued work
2843 * was given the chance to run... */
2844 if (!test_bit(STATUS_SCANNING, &priv->status))
2845 goto done;
2846
2847 /* This should never be called or scheduled if there is currently
2848 * a scan active in the hardware. */
2849 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2850 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests "
2851 "Ignoring second request.\n");
2852 rc = -EIO;
2853 goto done;
2854 }
2855
2856 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2857 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2858 goto done;
2859 }
2860
2861 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2862 IWL_DEBUG_HC(priv,
2863 "Scan request while abort pending. Queuing.\n");
2864 goto done;
2865 }
2866
2867 if (iwl_is_rfkill(priv)) {
2868 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2869 goto done;
2870 }
2871
2872 if (!test_bit(STATUS_READY, &priv->status)) {
2873 IWL_DEBUG_HC(priv,
2874 "Scan request while uninitialized. Queuing.\n");
2875 goto done;
2876 }
2877
2878 if (!priv->scan_bands) {
2879 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2880 goto done;
2881 }
2882
2883 if (!priv->scan) {
2884 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2885 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2886 if (!priv->scan) {
2887 rc = -ENOMEM;
2888 goto done;
2889 }
2890 }
2891 scan = priv->scan;
2892 memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2893
2894 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2895 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2896
2897 if (iwl_is_associated(priv)) {
2898 u16 interval = 0;
2899 u32 extra;
2900 u32 suspend_time = 100;
2901 u32 scan_suspend_time = 100;
2902 unsigned long flags;
2903
2904 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2905
2906 spin_lock_irqsave(&priv->lock, flags);
2907 interval = priv->beacon_int;
2908 spin_unlock_irqrestore(&priv->lock, flags);
2909
2910 scan->suspend_time = 0;
2911 scan->max_out_time = cpu_to_le32(200 * 1024);
2912 if (!interval)
2913 interval = suspend_time;
2914 /*
2915 * suspend time format:
2916 * 0-19: beacon interval in usec (time before exec.)
2917 * 20-23: 0
2918 * 24-31: number of beacons (suspend between channels)
2919 */
2920
2921 extra = (suspend_time / interval) << 24;
2922 scan_suspend_time = 0xFF0FFFFF &
2923 (extra | ((suspend_time % interval) * 1024));
2924
2925 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2926 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2927 scan_suspend_time, interval);
2928 }
2929
2930 if (priv->scan_request->n_ssids) {
2931 int i, p = 0;
2932 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2933 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2934 /* always does wildcard anyway */
2935 if (!priv->scan_request->ssids[i].ssid_len)
2936 continue;
2937 scan->direct_scan[p].id = WLAN_EID_SSID;
2938 scan->direct_scan[p].len =
2939 priv->scan_request->ssids[i].ssid_len;
2940 memcpy(scan->direct_scan[p].ssid,
2941 priv->scan_request->ssids[i].ssid,
2942 priv->scan_request->ssids[i].ssid_len);
2943 n_probes++;
2944 p++;
2945 }
2946 is_active = true;
2947 } else
2948 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2949
2950 /* We don't build a direct scan probe request; the uCode will do
2951 * that based on the direct_mask added to each channel entry */
2952 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2953 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2954 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2955
2956 /* flags + rate selection */
2957
2958 if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2959 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2960 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2961 scan->good_CRC_th = 0;
2962 band = IEEE80211_BAND_2GHZ;
2963 } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2964 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2965 /*
2966 * If active scaning is requested but a certain channel
2967 * is marked passive, we can do active scanning if we
2968 * detect transmissions.
2969 */
2970 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2971 IWL_GOOD_CRC_TH_DISABLED;
2972 band = IEEE80211_BAND_5GHZ;
2973 } else {
2974 IWL_WARN(priv, "Invalid scan band count\n");
2975 goto done;
2976 }
2977
2978 scan->tx_cmd.len = cpu_to_le16(
2979 iwl_fill_probe_req(priv,
2980 (struct ieee80211_mgmt *)scan->data,
2981 priv->scan_request->ie,
2982 priv->scan_request->ie_len,
2983 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2984
2985 /* select Rx antennas */
2986 scan->flags |= iwl3945_get_antenna_flags(priv);
2987
2988 if (iwl_is_monitor_mode(priv))
2989 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2990
2991 scan->channel_count =
2992 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2993 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2994
2995 if (scan->channel_count == 0) {
2996 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2997 goto done;
2998 }
2999
3000 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3001 scan->channel_count * sizeof(struct iwl3945_scan_channel);
3002 cmd.data = scan;
3003 scan->len = cpu_to_le16(cmd.len);
3004
3005 set_bit(STATUS_SCAN_HW, &priv->status);
3006 rc = iwl_send_cmd_sync(priv, &cmd);
3007 if (rc)
3008 goto done;
3009
3010 queue_delayed_work(priv->workqueue, &priv->scan_check,
3011 IWL_SCAN_CHECK_WATCHDOG);
3012
3013 mutex_unlock(&priv->mutex);
3014 return;
3015
3016 done:
3017 /* can not perform scan make sure we clear scanning
3018 * bits from status so next scan request can be performed.
3019 * if we dont clear scanning status bit here all next scan
3020 * will fail
3021 */
3022 clear_bit(STATUS_SCAN_HW, &priv->status);
3023 clear_bit(STATUS_SCANNING, &priv->status);
3024
3025 /* inform mac80211 scan aborted */
3026 queue_work(priv->workqueue, &priv->scan_completed);
3027 mutex_unlock(&priv->mutex);
3028 }
3029
3030 static void iwl3945_bg_restart(struct work_struct *data)
3031 {
3032 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3033
3034 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035 return;
3036
3037 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3038 mutex_lock(&priv->mutex);
3039 priv->vif = NULL;
3040 priv->is_open = 0;
3041 mutex_unlock(&priv->mutex);
3042 iwl3945_down(priv);
3043 ieee80211_restart_hw(priv->hw);
3044 } else {
3045 iwl3945_down(priv);
3046
3047 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3048 return;
3049
3050 mutex_lock(&priv->mutex);
3051 __iwl3945_up(priv);
3052 mutex_unlock(&priv->mutex);
3053 }
3054 }
3055
3056 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3057 {
3058 struct iwl_priv *priv =
3059 container_of(data, struct iwl_priv, rx_replenish);
3060
3061 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3062 return;
3063
3064 mutex_lock(&priv->mutex);
3065 iwl3945_rx_replenish(priv);
3066 mutex_unlock(&priv->mutex);
3067 }
3068
3069 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3070
3071 void iwl3945_post_associate(struct iwl_priv *priv)
3072 {
3073 int rc = 0;
3074 struct ieee80211_conf *conf = NULL;
3075
3076 if (priv->iw_mode == NL80211_IFTYPE_AP) {
3077 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3078 return;
3079 }
3080
3081
3082 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3083 priv->assoc_id, priv->active_rxon.bssid_addr);
3084
3085 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3086 return;
3087
3088 if (!priv->vif || !priv->is_open)
3089 return;
3090
3091 iwl_scan_cancel_timeout(priv, 200);
3092
3093 conf = ieee80211_get_hw_conf(priv->hw);
3094
3095 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3096 iwlcore_commit_rxon(priv);
3097
3098 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3099 iwl_setup_rxon_timing(priv);
3100 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3101 sizeof(priv->rxon_timing), &priv->rxon_timing);
3102 if (rc)
3103 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3104 "Attempting to continue.\n");
3105
3106 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3107
3108 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3109
3110 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3111 priv->assoc_id, priv->beacon_int);
3112
3113 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3114 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3115 else
3116 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3117
3118 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3119 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3120 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3121 else
3122 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3123
3124 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3125 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3126
3127 }
3128
3129 iwlcore_commit_rxon(priv);
3130
3131 switch (priv->iw_mode) {
3132 case NL80211_IFTYPE_STATION:
3133 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3134 break;
3135
3136 case NL80211_IFTYPE_ADHOC:
3137
3138 priv->assoc_id = 1;
3139 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3140 iwl3945_sync_sta(priv, IWL_STA_ID,
3141 (priv->band == IEEE80211_BAND_5GHZ) ?
3142 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3143 CMD_ASYNC);
3144 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3145 iwl3945_send_beacon_cmd(priv);
3146
3147 break;
3148
3149 default:
3150 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3151 __func__, priv->iw_mode);
3152 break;
3153 }
3154
3155 iwl_activate_qos(priv, 0);
3156
3157 /* we have just associated, don't start scan too early */
3158 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3159 }
3160
3161 /*****************************************************************************
3162 *
3163 * mac80211 entry point functions
3164 *
3165 *****************************************************************************/
3166
3167 #define UCODE_READY_TIMEOUT (2 * HZ)
3168
3169 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3170 {
3171 struct iwl_priv *priv = hw->priv;
3172 int ret;
3173
3174 IWL_DEBUG_MAC80211(priv, "enter\n");
3175
3176 /* we should be verifying the device is ready to be opened */
3177 mutex_lock(&priv->mutex);
3178
3179 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3180 * ucode filename and max sizes are card-specific. */
3181
3182 if (!priv->ucode_code.len) {
3183 ret = iwl3945_read_ucode(priv);
3184 if (ret) {
3185 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3186 mutex_unlock(&priv->mutex);
3187 goto out_release_irq;
3188 }
3189 }
3190
3191 ret = __iwl3945_up(priv);
3192
3193 mutex_unlock(&priv->mutex);
3194
3195 if (ret)
3196 goto out_release_irq;
3197
3198 IWL_DEBUG_INFO(priv, "Start UP work.\n");
3199
3200 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3201 * mac80211 will not be run successfully. */
3202 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3203 test_bit(STATUS_READY, &priv->status),
3204 UCODE_READY_TIMEOUT);
3205 if (!ret) {
3206 if (!test_bit(STATUS_READY, &priv->status)) {
3207 IWL_ERR(priv,
3208 "Wait for START_ALIVE timeout after %dms.\n",
3209 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3210 ret = -ETIMEDOUT;
3211 goto out_release_irq;
3212 }
3213 }
3214
3215 /* ucode is running and will send rfkill notifications,
3216 * no need to poll the killswitch state anymore */
3217 cancel_delayed_work(&priv->rfkill_poll);
3218
3219 iwl_led_start(priv);
3220
3221 priv->is_open = 1;
3222 IWL_DEBUG_MAC80211(priv, "leave\n");
3223 return 0;
3224
3225 out_release_irq:
3226 priv->is_open = 0;
3227 IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3228 return ret;
3229 }
3230
3231 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3232 {
3233 struct iwl_priv *priv = hw->priv;
3234
3235 IWL_DEBUG_MAC80211(priv, "enter\n");
3236
3237 if (!priv->is_open) {
3238 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3239 return;
3240 }
3241
3242 priv->is_open = 0;
3243
3244 if (iwl_is_ready_rf(priv)) {
3245 /* stop mac, cancel any scan request and clear
3246 * RXON_FILTER_ASSOC_MSK BIT
3247 */
3248 mutex_lock(&priv->mutex);
3249 iwl_scan_cancel_timeout(priv, 100);
3250 mutex_unlock(&priv->mutex);
3251 }
3252
3253 iwl3945_down(priv);
3254
3255 flush_workqueue(priv->workqueue);
3256
3257 /* start polling the killswitch state again */
3258 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3259 round_jiffies_relative(2 * HZ));
3260
3261 IWL_DEBUG_MAC80211(priv, "leave\n");
3262 }
3263
3264 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3265 {
3266 struct iwl_priv *priv = hw->priv;
3267
3268 IWL_DEBUG_MAC80211(priv, "enter\n");
3269
3270 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3271 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3272
3273 if (iwl3945_tx_skb(priv, skb))
3274 dev_kfree_skb_any(skb);
3275
3276 IWL_DEBUG_MAC80211(priv, "leave\n");
3277 return NETDEV_TX_OK;
3278 }
3279
3280 void iwl3945_config_ap(struct iwl_priv *priv)
3281 {
3282 int rc = 0;
3283
3284 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3285 return;
3286
3287 /* The following should be done only at AP bring up */
3288 if (!(iwl_is_associated(priv))) {
3289
3290 /* RXON - unassoc (to set timing command) */
3291 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3292 iwlcore_commit_rxon(priv);
3293
3294 /* RXON Timing */
3295 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3296 iwl_setup_rxon_timing(priv);
3297 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3298 sizeof(priv->rxon_timing),
3299 &priv->rxon_timing);
3300 if (rc)
3301 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3302 "Attempting to continue.\n");
3303
3304 /* FIXME: what should be the assoc_id for AP? */
3305 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3306 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3307 priv->staging_rxon.flags |=
3308 RXON_FLG_SHORT_PREAMBLE_MSK;
3309 else
3310 priv->staging_rxon.flags &=
3311 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3312
3313 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3314 if (priv->assoc_capability &
3315 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3316 priv->staging_rxon.flags |=
3317 RXON_FLG_SHORT_SLOT_MSK;
3318 else
3319 priv->staging_rxon.flags &=
3320 ~RXON_FLG_SHORT_SLOT_MSK;
3321
3322 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3323 priv->staging_rxon.flags &=
3324 ~RXON_FLG_SHORT_SLOT_MSK;
3325 }
3326 /* restore RXON assoc */
3327 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3328 iwlcore_commit_rxon(priv);
3329 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3330 }
3331 iwl3945_send_beacon_cmd(priv);
3332
3333 /* FIXME - we need to add code here to detect a totally new
3334 * configuration, reset the AP, unassoc, rxon timing, assoc,
3335 * clear sta table, add BCAST sta... */
3336 }
3337
3338 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3339 struct ieee80211_vif *vif,
3340 struct ieee80211_sta *sta,
3341 struct ieee80211_key_conf *key)
3342 {
3343 struct iwl_priv *priv = hw->priv;
3344 const u8 *addr;
3345 int ret = 0;
3346 u8 sta_id = IWL_INVALID_STATION;
3347 u8 static_key;
3348
3349 IWL_DEBUG_MAC80211(priv, "enter\n");
3350
3351 if (iwl3945_mod_params.sw_crypto) {
3352 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3353 return -EOPNOTSUPP;
3354 }
3355
3356 addr = sta ? sta->addr : iwl_bcast_addr;
3357 static_key = !iwl_is_associated(priv);
3358
3359 if (!static_key) {
3360 sta_id = iwl_find_station(priv, addr);
3361 if (sta_id == IWL_INVALID_STATION) {
3362 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3363 addr);
3364 return -EINVAL;
3365 }
3366 }
3367
3368 mutex_lock(&priv->mutex);
3369 iwl_scan_cancel_timeout(priv, 100);
3370 mutex_unlock(&priv->mutex);
3371
3372 switch (cmd) {
3373 case SET_KEY:
3374 if (static_key)
3375 ret = iwl3945_set_static_key(priv, key);
3376 else
3377 ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3378 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3379 break;
3380 case DISABLE_KEY:
3381 if (static_key)
3382 ret = iwl3945_remove_static_key(priv);
3383 else
3384 ret = iwl3945_clear_sta_key_info(priv, sta_id);
3385 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3386 break;
3387 default:
3388 ret = -EINVAL;
3389 }
3390
3391 IWL_DEBUG_MAC80211(priv, "leave\n");
3392
3393 return ret;
3394 }
3395
3396 /*****************************************************************************
3397 *
3398 * sysfs attributes
3399 *
3400 *****************************************************************************/
3401
3402 #ifdef CONFIG_IWLWIFI_DEBUG
3403
3404 /*
3405 * The following adds a new attribute to the sysfs representation
3406 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3407 * used for controlling the debug level.
3408 *
3409 * See the level definitions in iwl for details.
3410 *
3411 * The debug_level being managed using sysfs below is a per device debug
3412 * level that is used instead of the global debug level if it (the per
3413 * device debug level) is set.
3414 */
3415 static ssize_t show_debug_level(struct device *d,
3416 struct device_attribute *attr, char *buf)
3417 {
3418 struct iwl_priv *priv = dev_get_drvdata(d);
3419 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3420 }
3421 static ssize_t store_debug_level(struct device *d,
3422 struct device_attribute *attr,
3423 const char *buf, size_t count)
3424 {
3425 struct iwl_priv *priv = dev_get_drvdata(d);
3426 unsigned long val;
3427 int ret;
3428
3429 ret = strict_strtoul(buf, 0, &val);
3430 if (ret)
3431 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3432 else {
3433 priv->debug_level = val;
3434 if (iwl_alloc_traffic_mem(priv))
3435 IWL_ERR(priv,
3436 "Not enough memory to generate traffic log\n");
3437 }
3438 return strnlen(buf, count);
3439 }
3440
3441 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3442 show_debug_level, store_debug_level);
3443
3444 #endif /* CONFIG_IWLWIFI_DEBUG */
3445
3446 static ssize_t show_temperature(struct device *d,
3447 struct device_attribute *attr, char *buf)
3448 {
3449 struct iwl_priv *priv = dev_get_drvdata(d);
3450
3451 if (!iwl_is_alive(priv))
3452 return -EAGAIN;
3453
3454 return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3455 }
3456
3457 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3458
3459 static ssize_t show_tx_power(struct device *d,
3460 struct device_attribute *attr, char *buf)
3461 {
3462 struct iwl_priv *priv = dev_get_drvdata(d);
3463 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3464 }
3465
3466 static ssize_t store_tx_power(struct device *d,
3467 struct device_attribute *attr,
3468 const char *buf, size_t count)
3469 {
3470 struct iwl_priv *priv = dev_get_drvdata(d);
3471 char *p = (char *)buf;
3472 u32 val;
3473
3474 val = simple_strtoul(p, &p, 10);
3475 if (p == buf)
3476 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3477 else
3478 iwl3945_hw_reg_set_txpower(priv, val);
3479
3480 return count;
3481 }
3482
3483 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3484
3485 static ssize_t show_flags(struct device *d,
3486 struct device_attribute *attr, char *buf)
3487 {
3488 struct iwl_priv *priv = dev_get_drvdata(d);
3489
3490 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3491 }
3492
3493 static ssize_t store_flags(struct device *d,
3494 struct device_attribute *attr,
3495 const char *buf, size_t count)
3496 {
3497 struct iwl_priv *priv = dev_get_drvdata(d);
3498 u32 flags = simple_strtoul(buf, NULL, 0);
3499
3500 mutex_lock(&priv->mutex);
3501 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3502 /* Cancel any currently running scans... */
3503 if (iwl_scan_cancel_timeout(priv, 100))
3504 IWL_WARN(priv, "Could not cancel scan.\n");
3505 else {
3506 IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3507 flags);
3508 priv->staging_rxon.flags = cpu_to_le32(flags);
3509 iwlcore_commit_rxon(priv);
3510 }
3511 }
3512 mutex_unlock(&priv->mutex);
3513
3514 return count;
3515 }
3516
3517 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3518
3519 static ssize_t show_filter_flags(struct device *d,
3520 struct device_attribute *attr, char *buf)
3521 {
3522 struct iwl_priv *priv = dev_get_drvdata(d);
3523
3524 return sprintf(buf, "0x%04X\n",
3525 le32_to_cpu(priv->active_rxon.filter_flags));
3526 }
3527
3528 static ssize_t store_filter_flags(struct device *d,
3529 struct device_attribute *attr,
3530 const char *buf, size_t count)
3531 {
3532 struct iwl_priv *priv = dev_get_drvdata(d);
3533 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3534
3535 mutex_lock(&priv->mutex);
3536 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3537 /* Cancel any currently running scans... */
3538 if (iwl_scan_cancel_timeout(priv, 100))
3539 IWL_WARN(priv, "Could not cancel scan.\n");
3540 else {
3541 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3542 "0x%04X\n", filter_flags);
3543 priv->staging_rxon.filter_flags =
3544 cpu_to_le32(filter_flags);
3545 iwlcore_commit_rxon(priv);
3546 }
3547 }
3548 mutex_unlock(&priv->mutex);
3549
3550 return count;
3551 }
3552
3553 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3554 store_filter_flags);
3555
3556 static ssize_t show_measurement(struct device *d,
3557 struct device_attribute *attr, char *buf)
3558 {
3559 struct iwl_priv *priv = dev_get_drvdata(d);
3560 struct iwl_spectrum_notification measure_report;
3561 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3562 u8 *data = (u8 *)&measure_report;
3563 unsigned long flags;
3564
3565 spin_lock_irqsave(&priv->lock, flags);
3566 if (!(priv->measurement_status & MEASUREMENT_READY)) {
3567 spin_unlock_irqrestore(&priv->lock, flags);
3568 return 0;
3569 }
3570 memcpy(&measure_report, &priv->measure_report, size);
3571 priv->measurement_status = 0;
3572 spin_unlock_irqrestore(&priv->lock, flags);
3573
3574 while (size && (PAGE_SIZE - len)) {
3575 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3576 PAGE_SIZE - len, 1);
3577 len = strlen(buf);
3578 if (PAGE_SIZE - len)
3579 buf[len++] = '\n';
3580
3581 ofs += 16;
3582 size -= min(size, 16U);
3583 }
3584
3585 return len;
3586 }
3587
3588 static ssize_t store_measurement(struct device *d,
3589 struct device_attribute *attr,
3590 const char *buf, size_t count)
3591 {
3592 struct iwl_priv *priv = dev_get_drvdata(d);
3593 struct ieee80211_measurement_params params = {
3594 .channel = le16_to_cpu(priv->active_rxon.channel),
3595 .start_time = cpu_to_le64(priv->last_tsf),
3596 .duration = cpu_to_le16(1),
3597 };
3598 u8 type = IWL_MEASURE_BASIC;
3599 u8 buffer[32];
3600 u8 channel;
3601
3602 if (count) {
3603 char *p = buffer;
3604 strncpy(buffer, buf, min(sizeof(buffer), count));
3605 channel = simple_strtoul(p, NULL, 0);
3606 if (channel)
3607 params.channel = channel;
3608
3609 p = buffer;
3610 while (*p && *p != ' ')
3611 p++;
3612 if (*p)
3613 type = simple_strtoul(p + 1, NULL, 0);
3614 }
3615
3616 IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3617 "channel %d (for '%s')\n", type, params.channel, buf);
3618 iwl3945_get_measurement(priv, &params, type);
3619
3620 return count;
3621 }
3622
3623 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3624 show_measurement, store_measurement);
3625
3626 static ssize_t store_retry_rate(struct device *d,
3627 struct device_attribute *attr,
3628 const char *buf, size_t count)
3629 {
3630 struct iwl_priv *priv = dev_get_drvdata(d);
3631
3632 priv->retry_rate = simple_strtoul(buf, NULL, 0);
3633 if (priv->retry_rate <= 0)
3634 priv->retry_rate = 1;
3635
3636 return count;
3637 }
3638
3639 static ssize_t show_retry_rate(struct device *d,
3640 struct device_attribute *attr, char *buf)
3641 {
3642 struct iwl_priv *priv = dev_get_drvdata(d);
3643 return sprintf(buf, "%d", priv->retry_rate);
3644 }
3645
3646 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3647 store_retry_rate);
3648
3649
3650 static ssize_t show_channels(struct device *d,
3651 struct device_attribute *attr, char *buf)
3652 {
3653 /* all this shit doesn't belong into sysfs anyway */
3654 return 0;
3655 }
3656
3657 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3658
3659 static ssize_t show_statistics(struct device *d,
3660 struct device_attribute *attr, char *buf)
3661 {
3662 struct iwl_priv *priv = dev_get_drvdata(d);
3663 u32 size = sizeof(struct iwl3945_notif_statistics);
3664 u32 len = 0, ofs = 0;
3665 u8 *data = (u8 *)&priv->statistics_39;
3666 int rc = 0;
3667
3668 if (!iwl_is_alive(priv))
3669 return -EAGAIN;
3670
3671 mutex_lock(&priv->mutex);
3672 rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3673 mutex_unlock(&priv->mutex);
3674
3675 if (rc) {
3676 len = sprintf(buf,
3677 "Error sending statistics request: 0x%08X\n", rc);
3678 return len;
3679 }
3680
3681 while (size && (PAGE_SIZE - len)) {
3682 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3683 PAGE_SIZE - len, 1);
3684 len = strlen(buf);
3685 if (PAGE_SIZE - len)
3686 buf[len++] = '\n';
3687
3688 ofs += 16;
3689 size -= min(size, 16U);
3690 }
3691
3692 return len;
3693 }
3694
3695 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3696
3697 static ssize_t show_antenna(struct device *d,
3698 struct device_attribute *attr, char *buf)
3699 {
3700 struct iwl_priv *priv = dev_get_drvdata(d);
3701
3702 if (!iwl_is_alive(priv))
3703 return -EAGAIN;
3704
3705 return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3706 }
3707
3708 static ssize_t store_antenna(struct device *d,
3709 struct device_attribute *attr,
3710 const char *buf, size_t count)
3711 {
3712 struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3713 int ant;
3714
3715 if (count == 0)
3716 return 0;
3717
3718 if (sscanf(buf, "%1i", &ant) != 1) {
3719 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3720 return count;
3721 }
3722
3723 if ((ant >= 0) && (ant <= 2)) {
3724 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3725 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3726 } else
3727 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3728
3729
3730 return count;
3731 }
3732
3733 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3734
3735 static ssize_t show_status(struct device *d,
3736 struct device_attribute *attr, char *buf)
3737 {
3738 struct iwl_priv *priv = dev_get_drvdata(d);
3739 if (!iwl_is_alive(priv))
3740 return -EAGAIN;
3741 return sprintf(buf, "0x%08x\n", (int)priv->status);
3742 }
3743
3744 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3745
3746 static ssize_t dump_error_log(struct device *d,
3747 struct device_attribute *attr,
3748 const char *buf, size_t count)
3749 {
3750 struct iwl_priv *priv = dev_get_drvdata(d);
3751 char *p = (char *)buf;
3752
3753 if (p[0] == '1')
3754 iwl3945_dump_nic_error_log(priv);
3755
3756 return strnlen(buf, count);
3757 }
3758
3759 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3760
3761 /*****************************************************************************
3762 *
3763 * driver setup and tear down
3764 *
3765 *****************************************************************************/
3766
3767 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3768 {
3769 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3770
3771 init_waitqueue_head(&priv->wait_command_queue);
3772
3773 INIT_WORK(&priv->restart, iwl3945_bg_restart);
3774 INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3775 INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3776 INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3777 INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3778 INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3779 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3780 INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3781 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3782 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3783
3784 iwl3945_hw_setup_deferred_work(priv);
3785
3786 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3787 iwl3945_irq_tasklet, (unsigned long)priv);
3788 }
3789
3790 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3791 {
3792 iwl3945_hw_cancel_deferred_work(priv);
3793
3794 cancel_delayed_work_sync(&priv->init_alive_start);
3795 cancel_delayed_work(&priv->scan_check);
3796 cancel_delayed_work(&priv->alive_start);
3797 cancel_work_sync(&priv->beacon_update);
3798 }
3799
3800 static struct attribute *iwl3945_sysfs_entries[] = {
3801 &dev_attr_antenna.attr,
3802 &dev_attr_channels.attr,
3803 &dev_attr_dump_errors.attr,
3804 &dev_attr_flags.attr,
3805 &dev_attr_filter_flags.attr,
3806 &dev_attr_measurement.attr,
3807 &dev_attr_retry_rate.attr,
3808 &dev_attr_statistics.attr,
3809 &dev_attr_status.attr,
3810 &dev_attr_temperature.attr,
3811 &dev_attr_tx_power.attr,
3812 #ifdef CONFIG_IWLWIFI_DEBUG
3813 &dev_attr_debug_level.attr,
3814 #endif
3815 NULL
3816 };
3817
3818 static struct attribute_group iwl3945_attribute_group = {
3819 .name = NULL, /* put in device directory */
3820 .attrs = iwl3945_sysfs_entries,
3821 };
3822
3823 static struct ieee80211_ops iwl3945_hw_ops = {
3824 .tx = iwl3945_mac_tx,
3825 .start = iwl3945_mac_start,
3826 .stop = iwl3945_mac_stop,
3827 .add_interface = iwl_mac_add_interface,
3828 .remove_interface = iwl_mac_remove_interface,
3829 .config = iwl_mac_config,
3830 .configure_filter = iwl_configure_filter,
3831 .set_key = iwl3945_mac_set_key,
3832 .conf_tx = iwl_mac_conf_tx,
3833 .reset_tsf = iwl_mac_reset_tsf,
3834 .bss_info_changed = iwl_bss_info_changed,
3835 .hw_scan = iwl_mac_hw_scan
3836 };
3837
3838 static int iwl3945_init_drv(struct iwl_priv *priv)
3839 {
3840 int ret;
3841 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3842
3843 priv->retry_rate = 1;
3844 priv->ibss_beacon = NULL;
3845
3846 spin_lock_init(&priv->sta_lock);
3847 spin_lock_init(&priv->hcmd_lock);
3848
3849 INIT_LIST_HEAD(&priv->free_frames);
3850
3851 mutex_init(&priv->mutex);
3852 mutex_init(&priv->sync_cmd_mutex);
3853
3854 /* Clear the driver's (not device's) station table */
3855 iwl_clear_stations_table(priv);
3856
3857 priv->ieee_channels = NULL;
3858 priv->ieee_rates = NULL;
3859 priv->band = IEEE80211_BAND_2GHZ;
3860
3861 priv->iw_mode = NL80211_IFTYPE_STATION;
3862 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3863
3864 iwl_reset_qos(priv);
3865
3866 priv->qos_data.qos_active = 0;
3867 priv->qos_data.qos_cap.val = 0;
3868
3869 priv->rates_mask = IWL_RATES_MASK;
3870 priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3871
3872 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3873 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3874 eeprom->version);
3875 ret = -EINVAL;
3876 goto err;
3877 }
3878 ret = iwl_init_channel_map(priv);
3879 if (ret) {
3880 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3881 goto err;
3882 }
3883
3884 /* Set up txpower settings in driver for all channels */
3885 if (iwl3945_txpower_set_from_eeprom(priv)) {
3886 ret = -EIO;
3887 goto err_free_channel_map;
3888 }
3889
3890 ret = iwlcore_init_geos(priv);
3891 if (ret) {
3892 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3893 goto err_free_channel_map;
3894 }
3895 iwl3945_init_hw_rates(priv, priv->ieee_rates);
3896
3897 return 0;
3898
3899 err_free_channel_map:
3900 iwl_free_channel_map(priv);
3901 err:
3902 return ret;
3903 }
3904
3905 static int iwl3945_setup_mac(struct iwl_priv *priv)
3906 {
3907 int ret;
3908 struct ieee80211_hw *hw = priv->hw;
3909
3910 hw->rate_control_algorithm = "iwl-3945-rs";
3911 hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3912
3913 /* Tell mac80211 our characteristics */
3914 hw->flags = IEEE80211_HW_SIGNAL_DBM |
3915 IEEE80211_HW_NOISE_DBM |
3916 IEEE80211_HW_SPECTRUM_MGMT;
3917
3918 if (!priv->cfg->broken_powersave)
3919 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3920 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3921
3922 hw->wiphy->interface_modes =
3923 BIT(NL80211_IFTYPE_STATION) |
3924 BIT(NL80211_IFTYPE_ADHOC);
3925
3926 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3927 WIPHY_FLAG_DISABLE_BEACON_HINTS;
3928
3929 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3930 /* we create the 802.11 header and a zero-length SSID element */
3931 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3932
3933 /* Default value; 4 EDCA QOS priorities */
3934 hw->queues = 4;
3935
3936 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3937 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3938 &priv->bands[IEEE80211_BAND_2GHZ];
3939
3940 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3941 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3942 &priv->bands[IEEE80211_BAND_5GHZ];
3943
3944 ret = ieee80211_register_hw(priv->hw);
3945 if (ret) {
3946 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3947 return ret;
3948 }
3949 priv->mac80211_registered = 1;
3950
3951 return 0;
3952 }
3953
3954 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3955 {
3956 int err = 0;
3957 struct iwl_priv *priv;
3958 struct ieee80211_hw *hw;
3959 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3960 struct iwl3945_eeprom *eeprom;
3961 unsigned long flags;
3962
3963 /***********************
3964 * 1. Allocating HW data
3965 * ********************/
3966
3967 /* mac80211 allocates memory for this device instance, including
3968 * space for this driver's private structure */
3969 hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3970 if (hw == NULL) {
3971 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3972 err = -ENOMEM;
3973 goto out;
3974 }
3975 priv = hw->priv;
3976 SET_IEEE80211_DEV(hw, &pdev->dev);
3977
3978 /*
3979 * Disabling hardware scan means that mac80211 will perform scans
3980 * "the hard way", rather than using device's scan.
3981 */
3982 if (iwl3945_mod_params.disable_hw_scan) {
3983 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3984 iwl3945_hw_ops.hw_scan = NULL;
3985 }
3986
3987
3988 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3989 priv->cfg = cfg;
3990 priv->pci_dev = pdev;
3991 priv->inta_mask = CSR_INI_SET_MASK;
3992
3993 #ifdef CONFIG_IWLWIFI_DEBUG
3994 atomic_set(&priv->restrict_refcnt, 0);
3995 #endif
3996 if (iwl_alloc_traffic_mem(priv))
3997 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3998
3999 /***************************
4000 * 2. Initializing PCI bus
4001 * *************************/
4002 if (pci_enable_device(pdev)) {
4003 err = -ENODEV;
4004 goto out_ieee80211_free_hw;
4005 }
4006
4007 pci_set_master(pdev);
4008
4009 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4010 if (!err)
4011 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4012 if (err) {
4013 IWL_WARN(priv, "No suitable DMA available.\n");
4014 goto out_pci_disable_device;
4015 }
4016
4017 pci_set_drvdata(pdev, priv);
4018 err = pci_request_regions(pdev, DRV_NAME);
4019 if (err)
4020 goto out_pci_disable_device;
4021
4022 /***********************
4023 * 3. Read REV Register
4024 * ********************/
4025 priv->hw_base = pci_iomap(pdev, 0, 0);
4026 if (!priv->hw_base) {
4027 err = -ENODEV;
4028 goto out_pci_release_regions;
4029 }
4030
4031 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4032 (unsigned long long) pci_resource_len(pdev, 0));
4033 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4034
4035 /* We disable the RETRY_TIMEOUT register (0x41) to keep
4036 * PCI Tx retries from interfering with C3 CPU state */
4037 pci_write_config_byte(pdev, 0x41, 0x00);
4038
4039 /* these spin locks will be used in apm_ops.init and EEPROM access
4040 * we should init now
4041 */
4042 spin_lock_init(&priv->reg_lock);
4043 spin_lock_init(&priv->lock);
4044
4045 /*
4046 * stop and reset the on-board processor just in case it is in a
4047 * strange state ... like being left stranded by a primary kernel
4048 * and this is now the kdump kernel trying to start up
4049 */
4050 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4051
4052 /***********************
4053 * 4. Read EEPROM
4054 * ********************/
4055
4056 /* Read the EEPROM */
4057 err = iwl_eeprom_init(priv);
4058 if (err) {
4059 IWL_ERR(priv, "Unable to init EEPROM\n");
4060 goto out_iounmap;
4061 }
4062 /* MAC Address location in EEPROM same for 3945/4965 */
4063 eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4064 memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4065 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4066 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4067
4068 /***********************
4069 * 5. Setup HW Constants
4070 * ********************/
4071 /* Device-specific setup */
4072 if (iwl3945_hw_set_hw_params(priv)) {
4073 IWL_ERR(priv, "failed to set hw settings\n");
4074 goto out_eeprom_free;
4075 }
4076
4077 /***********************
4078 * 6. Setup priv
4079 * ********************/
4080
4081 err = iwl3945_init_drv(priv);
4082 if (err) {
4083 IWL_ERR(priv, "initializing driver failed\n");
4084 goto out_unset_hw_params;
4085 }
4086
4087 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4088 priv->cfg->name);
4089
4090 /***********************
4091 * 7. Setup Services
4092 * ********************/
4093
4094 spin_lock_irqsave(&priv->lock, flags);
4095 iwl_disable_interrupts(priv);
4096 spin_unlock_irqrestore(&priv->lock, flags);
4097
4098 pci_enable_msi(priv->pci_dev);
4099
4100 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4101 IRQF_SHARED, DRV_NAME, priv);
4102 if (err) {
4103 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4104 goto out_disable_msi;
4105 }
4106
4107 err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4108 if (err) {
4109 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4110 goto out_release_irq;
4111 }
4112
4113 iwl_set_rxon_channel(priv,
4114 &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4115 iwl3945_setup_deferred_work(priv);
4116 iwl3945_setup_rx_handlers(priv);
4117 iwl_power_initialize(priv);
4118
4119 /*********************************
4120 * 8. Setup and Register mac80211
4121 * *******************************/
4122
4123 iwl_enable_interrupts(priv);
4124
4125 err = iwl3945_setup_mac(priv);
4126 if (err)
4127 goto out_remove_sysfs;
4128
4129 err = iwl_dbgfs_register(priv, DRV_NAME);
4130 if (err)
4131 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4132
4133 /* Start monitoring the killswitch */
4134 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4135 2 * HZ);
4136
4137 return 0;
4138
4139 out_remove_sysfs:
4140 destroy_workqueue(priv->workqueue);
4141 priv->workqueue = NULL;
4142 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4143 out_release_irq:
4144 free_irq(priv->pci_dev->irq, priv);
4145 out_disable_msi:
4146 pci_disable_msi(priv->pci_dev);
4147 iwlcore_free_geos(priv);
4148 iwl_free_channel_map(priv);
4149 out_unset_hw_params:
4150 iwl3945_unset_hw_params(priv);
4151 out_eeprom_free:
4152 iwl_eeprom_free(priv);
4153 out_iounmap:
4154 pci_iounmap(pdev, priv->hw_base);
4155 out_pci_release_regions:
4156 pci_release_regions(pdev);
4157 out_pci_disable_device:
4158 pci_set_drvdata(pdev, NULL);
4159 pci_disable_device(pdev);
4160 out_ieee80211_free_hw:
4161 iwl_free_traffic_mem(priv);
4162 ieee80211_free_hw(priv->hw);
4163 out:
4164 return err;
4165 }
4166
4167 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4168 {
4169 struct iwl_priv *priv = pci_get_drvdata(pdev);
4170 unsigned long flags;
4171
4172 if (!priv)
4173 return;
4174
4175 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4176
4177 iwl_dbgfs_unregister(priv);
4178
4179 set_bit(STATUS_EXIT_PENDING, &priv->status);
4180
4181 if (priv->mac80211_registered) {
4182 ieee80211_unregister_hw(priv->hw);
4183 priv->mac80211_registered = 0;
4184 } else {
4185 iwl3945_down(priv);
4186 }
4187
4188 /*
4189 * Make sure device is reset to low power before unloading driver.
4190 * This may be redundant with iwl_down(), but there are paths to
4191 * run iwl_down() without calling apm_ops.stop(), and there are
4192 * paths to avoid running iwl_down() at all before leaving driver.
4193 * This (inexpensive) call *makes sure* device is reset.
4194 */
4195 priv->cfg->ops->lib->apm_ops.stop(priv);
4196
4197 /* make sure we flush any pending irq or
4198 * tasklet for the driver
4199 */
4200 spin_lock_irqsave(&priv->lock, flags);
4201 iwl_disable_interrupts(priv);
4202 spin_unlock_irqrestore(&priv->lock, flags);
4203
4204 iwl_synchronize_irq(priv);
4205
4206 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4207
4208 cancel_delayed_work_sync(&priv->rfkill_poll);
4209
4210 iwl3945_dealloc_ucode_pci(priv);
4211
4212 if (priv->rxq.bd)
4213 iwl3945_rx_queue_free(priv, &priv->rxq);
4214 iwl3945_hw_txq_ctx_free(priv);
4215
4216 iwl3945_unset_hw_params(priv);
4217 iwl_clear_stations_table(priv);
4218
4219 /*netif_stop_queue(dev); */
4220 flush_workqueue(priv->workqueue);
4221
4222 /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4223 * priv->workqueue... so we can't take down the workqueue
4224 * until now... */
4225 destroy_workqueue(priv->workqueue);
4226 priv->workqueue = NULL;
4227 iwl_free_traffic_mem(priv);
4228
4229 free_irq(pdev->irq, priv);
4230 pci_disable_msi(pdev);
4231
4232 pci_iounmap(pdev, priv->hw_base);
4233 pci_release_regions(pdev);
4234 pci_disable_device(pdev);
4235 pci_set_drvdata(pdev, NULL);
4236
4237 iwl_free_channel_map(priv);
4238 iwlcore_free_geos(priv);
4239 kfree(priv->scan);
4240 if (priv->ibss_beacon)
4241 dev_kfree_skb(priv->ibss_beacon);
4242
4243 ieee80211_free_hw(priv->hw);
4244 }
4245
4246
4247 /*****************************************************************************
4248 *
4249 * driver and module entry point
4250 *
4251 *****************************************************************************/
4252
4253 static struct pci_driver iwl3945_driver = {
4254 .name = DRV_NAME,
4255 .id_table = iwl3945_hw_card_ids,
4256 .probe = iwl3945_pci_probe,
4257 .remove = __devexit_p(iwl3945_pci_remove),
4258 #ifdef CONFIG_PM
4259 .suspend = iwl_pci_suspend,
4260 .resume = iwl_pci_resume,
4261 #endif
4262 };
4263
4264 static int __init iwl3945_init(void)
4265 {
4266
4267 int ret;
4268 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4269 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4270
4271 ret = iwl3945_rate_control_register();
4272 if (ret) {
4273 printk(KERN_ERR DRV_NAME
4274 "Unable to register rate control algorithm: %d\n", ret);
4275 return ret;
4276 }
4277
4278 ret = pci_register_driver(&iwl3945_driver);
4279 if (ret) {
4280 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4281 goto error_register;
4282 }
4283
4284 return ret;
4285
4286 error_register:
4287 iwl3945_rate_control_unregister();
4288 return ret;
4289 }
4290
4291 static void __exit iwl3945_exit(void)
4292 {
4293 pci_unregister_driver(&iwl3945_driver);
4294 iwl3945_rate_control_unregister();
4295 }
4296
4297 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4298
4299 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4300 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4301 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4302 MODULE_PARM_DESC(swcrypto,
4303 "using software crypto (default 1 [software])\n");
4304 #ifdef CONFIG_IWLWIFI_DEBUG
4305 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4306 MODULE_PARM_DESC(debug, "debug output mask");
4307 #endif
4308 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4309 int, S_IRUGO);
4310 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4311 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4312 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4313
4314 module_exit(iwl3945_exit);
4315 module_init(iwl3945_init);
Linux kernel - Deliverables
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