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drivers/net: Remove unnecessary returns from void function()s
[linux-2.6/kvm.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
blob1beb81c0be682bd9a981d2e13048234319c01cf8
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->_3945.shared_virt)
356 dma_free_coherent(&priv->pci_dev->dev,
357 sizeof(struct iwl3945_shared),
358 priv->_3945.shared_virt,
359 priv->_3945.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 spin_unlock_irqrestore(&priv->lock, flags);
509
510 hdr_len = ieee80211_hdrlen(fc);
511
512 /* Find (or create) index into station table for destination station */
513 if (info->flags & IEEE80211_TX_CTL_INJECTED)
514 sta_id = priv->hw_params.bcast_sta_id;
515 else
516 sta_id = iwl_get_sta_id(priv, hdr);
517 if (sta_id == IWL_INVALID_STATION) {
518 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
519 hdr->addr1);
520 goto drop;
521 }
522
523 IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
524
525 if (ieee80211_is_data_qos(fc)) {
526 qc = ieee80211_get_qos_ctl(hdr);
527 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
528 if (unlikely(tid >= MAX_TID_COUNT))
529 goto drop;
530 seq_number = priv->stations[sta_id].tid[tid].seq_number &
531 IEEE80211_SCTL_SEQ;
532 hdr->seq_ctrl = cpu_to_le16(seq_number) |
533 (hdr->seq_ctrl &
534 cpu_to_le16(IEEE80211_SCTL_FRAG));
535 seq_number += 0x10;
536 }
537
538 /* Descriptor for chosen Tx queue */
539 txq = &priv->txq[txq_id];
540 q = &txq->q;
541
542 if ((iwl_queue_space(q) < q->high_mark))
543 goto drop;
544
545 spin_lock_irqsave(&priv->lock, flags);
546
547 idx = get_cmd_index(q, q->write_ptr, 0);
548
549 /* Set up driver data for this TFD */
550 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
551 txq->txb[q->write_ptr].skb[0] = skb;
552
553 /* Init first empty entry in queue's array of Tx/cmd buffers */
554 out_cmd = txq->cmd[idx];
555 out_meta = &txq->meta[idx];
556 tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
557 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
558 memset(tx_cmd, 0, sizeof(*tx_cmd));
559
560 /*
561 * Set up the Tx-command (not MAC!) header.
562 * Store the chosen Tx queue and TFD index within the sequence field;
563 * after Tx, uCode's Tx response will return this value so driver can
564 * locate the frame within the tx queue and do post-tx processing.
565 */
566 out_cmd->hdr.cmd = REPLY_TX;
567 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
568 INDEX_TO_SEQ(q->write_ptr)));
569
570 /* Copy MAC header from skb into command buffer */
571 memcpy(tx_cmd->hdr, hdr, hdr_len);
572
573
574 if (info->control.hw_key)
575 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
576
577 /* TODO need this for burst mode later on */
578 iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
579
580 /* set is_hcca to 0; it probably will never be implemented */
581 iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
582
583 /* Total # bytes to be transmitted */
584 len = (u16)skb->len;
585 tx_cmd->len = cpu_to_le16(len);
586
587 iwl_dbg_log_tx_data_frame(priv, len, hdr);
588 iwl_update_stats(priv, true, fc, len);
589 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
590 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
591
592 if (!ieee80211_has_morefrags(hdr->frame_control)) {
593 txq->need_update = 1;
594 if (qc)
595 priv->stations[sta_id].tid[tid].seq_number = seq_number;
596 } else {
597 wait_write_ptr = 1;
598 txq->need_update = 0;
599 }
600
601 IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
602 le16_to_cpu(out_cmd->hdr.sequence));
603 IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
604 iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
605 iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
606 ieee80211_hdrlen(fc));
607
608 /*
609 * Use the first empty entry in this queue's command buffer array
610 * to contain the Tx command and MAC header concatenated together
611 * (payload data will be in another buffer).
612 * Size of this varies, due to varying MAC header length.
613 * If end is not dword aligned, we'll have 2 extra bytes at the end
614 * of the MAC header (device reads on dword boundaries).
615 * We'll tell device about this padding later.
616 */
617 len = sizeof(struct iwl3945_tx_cmd) +
618 sizeof(struct iwl_cmd_header) + hdr_len;
619
620 len_org = len;
621 len = (len + 3) & ~3;
622
623 if (len_org != len)
624 len_org = 1;
625 else
626 len_org = 0;
627
628 /* Physical address of this Tx command's header (not MAC header!),
629 * within command buffer array. */
630 txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
631 len, PCI_DMA_TODEVICE);
632 /* we do not map meta data ... so we can safely access address to
633 * provide to unmap command*/
634 pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
635 pci_unmap_len_set(out_meta, len, len);
636
637 /* Add buffer containing Tx command and MAC(!) header to TFD's
638 * first entry */
639 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
640 txcmd_phys, len, 1, 0);
641
642
643 /* Set up TFD's 2nd entry to point directly to remainder of skb,
644 * if any (802.11 null frames have no payload). */
645 len = skb->len - hdr_len;
646 if (len) {
647 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
648 len, PCI_DMA_TODEVICE);
649 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
650 phys_addr, len,
651 0, U32_PAD(len));
652 }
653
654
655 /* Tell device the write index *just past* this latest filled TFD */
656 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
657 iwl_txq_update_write_ptr(priv, txq);
658 spin_unlock_irqrestore(&priv->lock, flags);
659
660 if ((iwl_queue_space(q) < q->high_mark)
661 && priv->mac80211_registered) {
662 if (wait_write_ptr) {
663 spin_lock_irqsave(&priv->lock, flags);
664 txq->need_update = 1;
665 iwl_txq_update_write_ptr(priv, txq);
666 spin_unlock_irqrestore(&priv->lock, flags);
667 }
668
669 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
670 }
671
672 return 0;
673
674 drop_unlock:
675 spin_unlock_irqrestore(&priv->lock, flags);
676 drop:
677 return -1;
678 }
679
680 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
681 #define BEACON_TIME_MASK_HIGH 0xFF000000
682 #define TIME_UNIT 1024
683
684 /*
685 * extended beacon time format
686 * time in usec will be changed into a 32-bit value in 8:24 format
687 * the high 1 byte is the beacon counts
688 * the lower 3 bytes is the time in usec within one beacon interval
689 */
690
691 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
692 {
693 u32 quot;
694 u32 rem;
695 u32 interval = beacon_interval * 1024;
696
697 if (!interval || !usec)
698 return 0;
699
700 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
701 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
702
703 return (quot << 24) + rem;
704 }
705
706 /* base is usually what we get from ucode with each received frame,
707 * the same as HW timer counter counting down
708 */
709
710 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
711 {
712 u32 base_low = base & BEACON_TIME_MASK_LOW;
713 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
714 u32 interval = beacon_interval * TIME_UNIT;
715 u32 res = (base & BEACON_TIME_MASK_HIGH) +
716 (addon & BEACON_TIME_MASK_HIGH);
717
718 if (base_low > addon_low)
719 res += base_low - addon_low;
720 else if (base_low < addon_low) {
721 res += interval + base_low - addon_low;
722 res += (1 << 24);
723 } else
724 res += (1 << 24);
725
726 return cpu_to_le32(res);
727 }
728
729 static int iwl3945_get_measurement(struct iwl_priv *priv,
730 struct ieee80211_measurement_params *params,
731 u8 type)
732 {
733 struct iwl_spectrum_cmd spectrum;
734 struct iwl_rx_packet *pkt;
735 struct iwl_host_cmd cmd = {
736 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
737 .data = (void *)&spectrum,
738 .flags = CMD_WANT_SKB,
739 };
740 u32 add_time = le64_to_cpu(params->start_time);
741 int rc;
742 int spectrum_resp_status;
743 int duration = le16_to_cpu(params->duration);
744
745 if (iwl_is_associated(priv))
746 add_time =
747 iwl3945_usecs_to_beacons(
748 le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
749 le16_to_cpu(priv->rxon_timing.beacon_interval));
750
751 memset(&spectrum, 0, sizeof(spectrum));
752
753 spectrum.channel_count = cpu_to_le16(1);
754 spectrum.flags =
755 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
756 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
757 cmd.len = sizeof(spectrum);
758 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
759
760 if (iwl_is_associated(priv))
761 spectrum.start_time =
762 iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
763 add_time,
764 le16_to_cpu(priv->rxon_timing.beacon_interval));
765 else
766 spectrum.start_time = 0;
767
768 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
769 spectrum.channels[0].channel = params->channel;
770 spectrum.channels[0].type = type;
771 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
772 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
773 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
774
775 rc = iwl_send_cmd_sync(priv, &cmd);
776 if (rc)
777 return rc;
778
779 pkt = (struct iwl_rx_packet *)cmd.reply_page;
780 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
781 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
782 rc = -EIO;
783 }
784
785 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
786 switch (spectrum_resp_status) {
787 case 0: /* Command will be handled */
788 if (pkt->u.spectrum.id != 0xff) {
789 IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
790 pkt->u.spectrum.id);
791 priv->measurement_status &= ~MEASUREMENT_READY;
792 }
793 priv->measurement_status |= MEASUREMENT_ACTIVE;
794 rc = 0;
795 break;
796
797 case 1: /* Command will not be handled */
798 rc = -EAGAIN;
799 break;
800 }
801
802 iwl_free_pages(priv, cmd.reply_page);
803
804 return rc;
805 }
806
807 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
808 struct iwl_rx_mem_buffer *rxb)
809 {
810 struct iwl_rx_packet *pkt = rxb_addr(rxb);
811 struct iwl_alive_resp *palive;
812 struct delayed_work *pwork;
813
814 palive = &pkt->u.alive_frame;
815
816 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
817 "0x%01X 0x%01X\n",
818 palive->is_valid, palive->ver_type,
819 palive->ver_subtype);
820
821 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
822 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
823 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
824 sizeof(struct iwl_alive_resp));
825 pwork = &priv->init_alive_start;
826 } else {
827 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
828 memcpy(&priv->card_alive, &pkt->u.alive_frame,
829 sizeof(struct iwl_alive_resp));
830 pwork = &priv->alive_start;
831 iwl3945_disable_events(priv);
832 }
833
834 /* We delay the ALIVE response by 5ms to
835 * give the HW RF Kill time to activate... */
836 if (palive->is_valid == UCODE_VALID_OK)
837 queue_delayed_work(priv->workqueue, pwork,
838 msecs_to_jiffies(5));
839 else
840 IWL_WARN(priv, "uCode did not respond OK.\n");
841 }
842
843 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
844 struct iwl_rx_mem_buffer *rxb)
845 {
846 #ifdef CONFIG_IWLWIFI_DEBUG
847 struct iwl_rx_packet *pkt = rxb_addr(rxb);
848 #endif
849
850 IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
851 }
852
853 static void iwl3945_bg_beacon_update(struct work_struct *work)
854 {
855 struct iwl_priv *priv =
856 container_of(work, struct iwl_priv, beacon_update);
857 struct sk_buff *beacon;
858
859 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
860 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
861
862 if (!beacon) {
863 IWL_ERR(priv, "update beacon failed\n");
864 return;
865 }
866
867 mutex_lock(&priv->mutex);
868 /* new beacon skb is allocated every time; dispose previous.*/
869 if (priv->ibss_beacon)
870 dev_kfree_skb(priv->ibss_beacon);
871
872 priv->ibss_beacon = beacon;
873 mutex_unlock(&priv->mutex);
874
875 iwl3945_send_beacon_cmd(priv);
876 }
877
878 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
879 struct iwl_rx_mem_buffer *rxb)
880 {
881 #ifdef CONFIG_IWLWIFI_DEBUG
882 struct iwl_rx_packet *pkt = rxb_addr(rxb);
883 struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
884 u8 rate = beacon->beacon_notify_hdr.rate;
885
886 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
887 "tsf %d %d rate %d\n",
888 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
889 beacon->beacon_notify_hdr.failure_frame,
890 le32_to_cpu(beacon->ibss_mgr_status),
891 le32_to_cpu(beacon->high_tsf),
892 le32_to_cpu(beacon->low_tsf), rate);
893 #endif
894
895 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
896 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
897 queue_work(priv->workqueue, &priv->beacon_update);
898 }
899
900 /* Handle notification from uCode that card's power state is changing
901 * due to software, hardware, or critical temperature RFKILL */
902 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
903 struct iwl_rx_mem_buffer *rxb)
904 {
905 struct iwl_rx_packet *pkt = rxb_addr(rxb);
906 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
907 unsigned long status = priv->status;
908
909 IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
910 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
911 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
912
913 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
914 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
915
916 if (flags & HW_CARD_DISABLED)
917 set_bit(STATUS_RF_KILL_HW, &priv->status);
918 else
919 clear_bit(STATUS_RF_KILL_HW, &priv->status);
920
921
922 iwl_scan_cancel(priv);
923
924 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
925 test_bit(STATUS_RF_KILL_HW, &priv->status)))
926 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
927 test_bit(STATUS_RF_KILL_HW, &priv->status));
928 else
929 wake_up_interruptible(&priv->wait_command_queue);
930 }
931
932 /**
933 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
934 *
935 * Setup the RX handlers for each of the reply types sent from the uCode
936 * to the host.
937 *
938 * This function chains into the hardware specific files for them to setup
939 * any hardware specific handlers as well.
940 */
941 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
942 {
943 priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
944 priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
945 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
946 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
947 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
948 iwl_rx_spectrum_measure_notif;
949 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
950 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
951 iwl_rx_pm_debug_statistics_notif;
952 priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
953
954 /*
955 * The same handler is used for both the REPLY to a discrete
956 * statistics request from the host as well as for the periodic
957 * statistics notifications (after received beacons) from the uCode.
958 */
959 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
960 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
961
962 iwl_setup_rx_scan_handlers(priv);
963 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
964
965 /* Set up hardware specific Rx handlers */
966 iwl3945_hw_rx_handler_setup(priv);
967 }
968
969 /************************** RX-FUNCTIONS ****************************/
970 /*
971 * Rx theory of operation
972 *
973 * The host allocates 32 DMA target addresses and passes the host address
974 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
975 * 0 to 31
976 *
977 * Rx Queue Indexes
978 * The host/firmware share two index registers for managing the Rx buffers.
979 *
980 * The READ index maps to the first position that the firmware may be writing
981 * to -- the driver can read up to (but not including) this position and get
982 * good data.
983 * The READ index is managed by the firmware once the card is enabled.
984 *
985 * The WRITE index maps to the last position the driver has read from -- the
986 * position preceding WRITE is the last slot the firmware can place a packet.
987 *
988 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
989 * WRITE = READ.
990 *
991 * During initialization, the host sets up the READ queue position to the first
992 * INDEX position, and WRITE to the last (READ - 1 wrapped)
993 *
994 * When the firmware places a packet in a buffer, it will advance the READ index
995 * and fire the RX interrupt. The driver can then query the READ index and
996 * process as many packets as possible, moving the WRITE index forward as it
997 * resets the Rx queue buffers with new memory.
998 *
999 * The management in the driver is as follows:
1000 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
1001 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1002 * to replenish the iwl->rxq->rx_free.
1003 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1004 * iwl->rxq is replenished and the READ INDEX is updated (updating the
1005 * 'processed' and 'read' driver indexes as well)
1006 * + A received packet is processed and handed to the kernel network stack,
1007 * detached from the iwl->rxq. The driver 'processed' index is updated.
1008 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1009 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1010 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
1011 * were enough free buffers and RX_STALLED is set it is cleared.
1012 *
1013 *
1014 * Driver sequence:
1015 *
1016 * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
1017 * iwl3945_rx_queue_restock
1018 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1019 * queue, updates firmware pointers, and updates
1020 * the WRITE index. If insufficient rx_free buffers
1021 * are available, schedules iwl3945_rx_replenish
1022 *
1023 * -- enable interrupts --
1024 * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
1025 * READ INDEX, detaching the SKB from the pool.
1026 * Moves the packet buffer from queue to rx_used.
1027 * Calls iwl3945_rx_queue_restock to refill any empty
1028 * slots.
1029 * ...
1030 *
1031 */
1032
1033 /**
1034 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1035 */
1036 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1037 dma_addr_t dma_addr)
1038 {
1039 return cpu_to_le32((u32)dma_addr);
1040 }
1041
1042 /**
1043 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1044 *
1045 * If there are slots in the RX queue that need to be restocked,
1046 * and we have free pre-allocated buffers, fill the ranks as much
1047 * as we can, pulling from rx_free.
1048 *
1049 * This moves the 'write' index forward to catch up with 'processed', and
1050 * also updates the memory address in the firmware to reference the new
1051 * target buffer.
1052 */
1053 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1054 {
1055 struct iwl_rx_queue *rxq = &priv->rxq;
1056 struct list_head *element;
1057 struct iwl_rx_mem_buffer *rxb;
1058 unsigned long flags;
1059 int write;
1060
1061 spin_lock_irqsave(&rxq->lock, flags);
1062 write = rxq->write & ~0x7;
1063 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1064 /* Get next free Rx buffer, remove from free list */
1065 element = rxq->rx_free.next;
1066 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1067 list_del(element);
1068
1069 /* Point to Rx buffer via next RBD in circular buffer */
1070 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1071 rxq->queue[rxq->write] = rxb;
1072 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1073 rxq->free_count--;
1074 }
1075 spin_unlock_irqrestore(&rxq->lock, flags);
1076 /* If the pre-allocated buffer pool is dropping low, schedule to
1077 * refill it */
1078 if (rxq->free_count <= RX_LOW_WATERMARK)
1079 queue_work(priv->workqueue, &priv->rx_replenish);
1080
1081
1082 /* If we've added more space for the firmware to place data, tell it.
1083 * Increment device's write pointer in multiples of 8. */
1084 if ((rxq->write_actual != (rxq->write & ~0x7))
1085 || (abs(rxq->write - rxq->read) > 7)) {
1086 spin_lock_irqsave(&rxq->lock, flags);
1087 rxq->need_update = 1;
1088 spin_unlock_irqrestore(&rxq->lock, flags);
1089 iwl_rx_queue_update_write_ptr(priv, rxq);
1090 }
1091 }
1092
1093 /**
1094 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1095 *
1096 * When moving to rx_free an SKB is allocated for the slot.
1097 *
1098 * Also restock the Rx queue via iwl3945_rx_queue_restock.
1099 * This is called as a scheduled work item (except for during initialization)
1100 */
1101 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1102 {
1103 struct iwl_rx_queue *rxq = &priv->rxq;
1104 struct list_head *element;
1105 struct iwl_rx_mem_buffer *rxb;
1106 struct page *page;
1107 unsigned long flags;
1108 gfp_t gfp_mask = priority;
1109
1110 while (1) {
1111 spin_lock_irqsave(&rxq->lock, flags);
1112
1113 if (list_empty(&rxq->rx_used)) {
1114 spin_unlock_irqrestore(&rxq->lock, flags);
1115 return;
1116 }
1117 spin_unlock_irqrestore(&rxq->lock, flags);
1118
1119 if (rxq->free_count > RX_LOW_WATERMARK)
1120 gfp_mask |= __GFP_NOWARN;
1121
1122 if (priv->hw_params.rx_page_order > 0)
1123 gfp_mask |= __GFP_COMP;
1124
1125 /* Alloc a new receive buffer */
1126 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1127 if (!page) {
1128 if (net_ratelimit())
1129 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1130 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1131 net_ratelimit())
1132 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1133 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
1134 rxq->free_count);
1135 /* We don't reschedule replenish work here -- we will
1136 * call the restock method and if it still needs
1137 * more buffers it will schedule replenish */
1138 break;
1139 }
1140
1141 spin_lock_irqsave(&rxq->lock, flags);
1142 if (list_empty(&rxq->rx_used)) {
1143 spin_unlock_irqrestore(&rxq->lock, flags);
1144 __free_pages(page, priv->hw_params.rx_page_order);
1145 return;
1146 }
1147 element = rxq->rx_used.next;
1148 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1149 list_del(element);
1150 spin_unlock_irqrestore(&rxq->lock, flags);
1151
1152 rxb->page = page;
1153 /* Get physical address of RB/SKB */
1154 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1155 PAGE_SIZE << priv->hw_params.rx_page_order,
1156 PCI_DMA_FROMDEVICE);
1157
1158 spin_lock_irqsave(&rxq->lock, flags);
1159
1160 list_add_tail(&rxb->list, &rxq->rx_free);
1161 rxq->free_count++;
1162 priv->alloc_rxb_page++;
1163
1164 spin_unlock_irqrestore(&rxq->lock, flags);
1165 }
1166 }
1167
1168 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1169 {
1170 unsigned long flags;
1171 int i;
1172 spin_lock_irqsave(&rxq->lock, flags);
1173 INIT_LIST_HEAD(&rxq->rx_free);
1174 INIT_LIST_HEAD(&rxq->rx_used);
1175 /* Fill the rx_used queue with _all_ of the Rx buffers */
1176 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1177 /* In the reset function, these buffers may have been allocated
1178 * to an SKB, so we need to unmap and free potential storage */
1179 if (rxq->pool[i].page != NULL) {
1180 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1181 PAGE_SIZE << priv->hw_params.rx_page_order,
1182 PCI_DMA_FROMDEVICE);
1183 __iwl_free_pages(priv, rxq->pool[i].page);
1184 rxq->pool[i].page = NULL;
1185 }
1186 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1187 }
1188
1189 /* Set us so that we have processed and used all buffers, but have
1190 * not restocked the Rx queue with fresh buffers */
1191 rxq->read = rxq->write = 0;
1192 rxq->write_actual = 0;
1193 rxq->free_count = 0;
1194 spin_unlock_irqrestore(&rxq->lock, flags);
1195 }
1196
1197 void iwl3945_rx_replenish(void *data)
1198 {
1199 struct iwl_priv *priv = data;
1200 unsigned long flags;
1201
1202 iwl3945_rx_allocate(priv, GFP_KERNEL);
1203
1204 spin_lock_irqsave(&priv->lock, flags);
1205 iwl3945_rx_queue_restock(priv);
1206 spin_unlock_irqrestore(&priv->lock, flags);
1207 }
1208
1209 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1210 {
1211 iwl3945_rx_allocate(priv, GFP_ATOMIC);
1212
1213 iwl3945_rx_queue_restock(priv);
1214 }
1215
1216
1217 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1218 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1219 * This free routine walks the list of POOL entries and if SKB is set to
1220 * non NULL it is unmapped and freed
1221 */
1222 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1223 {
1224 int i;
1225 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1226 if (rxq->pool[i].page != NULL) {
1227 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1228 PAGE_SIZE << priv->hw_params.rx_page_order,
1229 PCI_DMA_FROMDEVICE);
1230 __iwl_free_pages(priv, rxq->pool[i].page);
1231 rxq->pool[i].page = NULL;
1232 }
1233 }
1234
1235 dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1236 rxq->dma_addr);
1237 dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1238 rxq->rb_stts, rxq->rb_stts_dma);
1239 rxq->bd = NULL;
1240 rxq->rb_stts = NULL;
1241 }
1242
1243
1244 /* Convert linear signal-to-noise ratio into dB */
1245 static u8 ratio2dB[100] = {
1246 /* 0 1 2 3 4 5 6 7 8 9 */
1247 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1248 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1249 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1250 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1251 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1252 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1253 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1254 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1255 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1256 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1257 };
1258
1259 /* Calculates a relative dB value from a ratio of linear
1260 * (i.e. not dB) signal levels.
1261 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1262 int iwl3945_calc_db_from_ratio(int sig_ratio)
1263 {
1264 /* 1000:1 or higher just report as 60 dB */
1265 if (sig_ratio >= 1000)
1266 return 60;
1267
1268 /* 100:1 or higher, divide by 10 and use table,
1269 * add 20 dB to make up for divide by 10 */
1270 if (sig_ratio >= 100)
1271 return 20 + (int)ratio2dB[sig_ratio/10];
1272
1273 /* We shouldn't see this */
1274 if (sig_ratio < 1)
1275 return 0;
1276
1277 /* Use table for ratios 1:1 - 99:1 */
1278 return (int)ratio2dB[sig_ratio];
1279 }
1280
1281 /**
1282 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1283 *
1284 * Uses the priv->rx_handlers callback function array to invoke
1285 * the appropriate handlers, including command responses,
1286 * frame-received notifications, and other notifications.
1287 */
1288 static void iwl3945_rx_handle(struct iwl_priv *priv)
1289 {
1290 struct iwl_rx_mem_buffer *rxb;
1291 struct iwl_rx_packet *pkt;
1292 struct iwl_rx_queue *rxq = &priv->rxq;
1293 u32 r, i;
1294 int reclaim;
1295 unsigned long flags;
1296 u8 fill_rx = 0;
1297 u32 count = 8;
1298 int total_empty = 0;
1299
1300 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1301 * buffer that the driver may process (last buffer filled by ucode). */
1302 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1303 i = rxq->read;
1304
1305 /* calculate total frames need to be restock after handling RX */
1306 total_empty = r - rxq->write_actual;
1307 if (total_empty < 0)
1308 total_empty += RX_QUEUE_SIZE;
1309
1310 if (total_empty > (RX_QUEUE_SIZE / 2))
1311 fill_rx = 1;
1312 /* Rx interrupt, but nothing sent from uCode */
1313 if (i == r)
1314 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1315
1316 while (i != r) {
1317 rxb = rxq->queue[i];
1318
1319 /* If an RXB doesn't have a Rx queue slot associated with it,
1320 * then a bug has been introduced in the queue refilling
1321 * routines -- catch it here */
1322 BUG_ON(rxb == NULL);
1323
1324 rxq->queue[i] = NULL;
1325
1326 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1327 PAGE_SIZE << priv->hw_params.rx_page_order,
1328 PCI_DMA_FROMDEVICE);
1329 pkt = rxb_addr(rxb);
1330
1331 trace_iwlwifi_dev_rx(priv, pkt,
1332 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1333
1334 /* Reclaim a command buffer only if this packet is a response
1335 * to a (driver-originated) command.
1336 * If the packet (e.g. Rx frame) originated from uCode,
1337 * there is no command buffer to reclaim.
1338 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1339 * but apparently a few don't get set; catch them here. */
1340 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1341 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1342 (pkt->hdr.cmd != REPLY_TX);
1343
1344 /* Based on type of command response or notification,
1345 * handle those that need handling via function in
1346 * rx_handlers table. See iwl3945_setup_rx_handlers() */
1347 if (priv->rx_handlers[pkt->hdr.cmd]) {
1348 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1349 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1350 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1351 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1352 } else {
1353 /* No handling needed */
1354 IWL_DEBUG_RX(priv,
1355 "r %d i %d No handler needed for %s, 0x%02x\n",
1356 r, i, get_cmd_string(pkt->hdr.cmd),
1357 pkt->hdr.cmd);
1358 }
1359
1360 /*
1361 * XXX: After here, we should always check rxb->page
1362 * against NULL before touching it or its virtual
1363 * memory (pkt). Because some rx_handler might have
1364 * already taken or freed the pages.
1365 */
1366
1367 if (reclaim) {
1368 /* Invoke any callbacks, transfer the buffer to caller,
1369 * and fire off the (possibly) blocking iwl_send_cmd()
1370 * as we reclaim the driver command queue */
1371 if (rxb->page)
1372 iwl_tx_cmd_complete(priv, rxb);
1373 else
1374 IWL_WARN(priv, "Claim null rxb?\n");
1375 }
1376
1377 /* Reuse the page if possible. For notification packets and
1378 * SKBs that fail to Rx correctly, add them back into the
1379 * rx_free list for reuse later. */
1380 spin_lock_irqsave(&rxq->lock, flags);
1381 if (rxb->page != NULL) {
1382 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1383 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1384 PCI_DMA_FROMDEVICE);
1385 list_add_tail(&rxb->list, &rxq->rx_free);
1386 rxq->free_count++;
1387 } else
1388 list_add_tail(&rxb->list, &rxq->rx_used);
1389
1390 spin_unlock_irqrestore(&rxq->lock, flags);
1391
1392 i = (i + 1) & RX_QUEUE_MASK;
1393 /* If there are a lot of unused frames,
1394 * restock the Rx queue so ucode won't assert. */
1395 if (fill_rx) {
1396 count++;
1397 if (count >= 8) {
1398 rxq->read = i;
1399 iwl3945_rx_replenish_now(priv);
1400 count = 0;
1401 }
1402 }
1403 }
1404
1405 /* Backtrack one entry */
1406 rxq->read = i;
1407 if (fill_rx)
1408 iwl3945_rx_replenish_now(priv);
1409 else
1410 iwl3945_rx_queue_restock(priv);
1411 }
1412
1413 /* call this function to flush any scheduled tasklet */
1414 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1415 {
1416 /* wait to make sure we flush pending tasklet*/
1417 synchronize_irq(priv->pci_dev->irq);
1418 tasklet_kill(&priv->irq_tasklet);
1419 }
1420
1421 static const char *desc_lookup(int i)
1422 {
1423 switch (i) {
1424 case 1:
1425 return "FAIL";
1426 case 2:
1427 return "BAD_PARAM";
1428 case 3:
1429 return "BAD_CHECKSUM";
1430 case 4:
1431 return "NMI_INTERRUPT";
1432 case 5:
1433 return "SYSASSERT";
1434 case 6:
1435 return "FATAL_ERROR";
1436 }
1437
1438 return "UNKNOWN";
1439 }
1440
1441 #define ERROR_START_OFFSET (1 * sizeof(u32))
1442 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1443
1444 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1445 {
1446 u32 i;
1447 u32 desc, time, count, base, data1;
1448 u32 blink1, blink2, ilink1, ilink2;
1449
1450 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1451
1452 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1453 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1454 return;
1455 }
1456
1457
1458 count = iwl_read_targ_mem(priv, base);
1459
1460 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1461 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1462 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1463 priv->status, count);
1464 }
1465
1466 IWL_ERR(priv, "Desc Time asrtPC blink2 "
1467 "ilink1 nmiPC Line\n");
1468 for (i = ERROR_START_OFFSET;
1469 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1470 i += ERROR_ELEM_SIZE) {
1471 desc = iwl_read_targ_mem(priv, base + i);
1472 time =
1473 iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1474 blink1 =
1475 iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1476 blink2 =
1477 iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1478 ilink1 =
1479 iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1480 ilink2 =
1481 iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1482 data1 =
1483 iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1484
1485 IWL_ERR(priv,
1486 "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1487 desc_lookup(desc), desc, time, blink1, blink2,
1488 ilink1, ilink2, data1);
1489 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1490 0, blink1, blink2, ilink1, ilink2);
1491 }
1492 }
1493
1494 #define EVENT_START_OFFSET (6 * sizeof(u32))
1495
1496 /**
1497 * iwl3945_print_event_log - Dump error event log to syslog
1498 *
1499 */
1500 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1501 u32 num_events, u32 mode,
1502 int pos, char **buf, size_t bufsz)
1503 {
1504 u32 i;
1505 u32 base; /* SRAM byte address of event log header */
1506 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1507 u32 ptr; /* SRAM byte address of log data */
1508 u32 ev, time, data; /* event log data */
1509 unsigned long reg_flags;
1510
1511 if (num_events == 0)
1512 return pos;
1513
1514 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1515
1516 if (mode == 0)
1517 event_size = 2 * sizeof(u32);
1518 else
1519 event_size = 3 * sizeof(u32);
1520
1521 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1522
1523 /* Make sure device is powered up for SRAM reads */
1524 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1525 iwl_grab_nic_access(priv);
1526
1527 /* Set starting address; reads will auto-increment */
1528 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1529 rmb();
1530
1531 /* "time" is actually "data" for mode 0 (no timestamp).
1532 * place event id # at far right for easier visual parsing. */
1533 for (i = 0; i < num_events; i++) {
1534 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1535 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536 if (mode == 0) {
1537 /* data, ev */
1538 if (bufsz) {
1539 pos += scnprintf(*buf + pos, bufsz - pos,
1540 "0x%08x:%04u\n",
1541 time, ev);
1542 } else {
1543 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1544 trace_iwlwifi_dev_ucode_event(priv, 0,
1545 time, ev);
1546 }
1547 } else {
1548 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1549 if (bufsz) {
1550 pos += scnprintf(*buf + pos, bufsz - pos,
1551 "%010u:0x%08x:%04u\n",
1552 time, data, ev);
1553 } else {
1554 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1555 time, data, ev);
1556 trace_iwlwifi_dev_ucode_event(priv, time,
1557 data, ev);
1558 }
1559 }
1560 }
1561
1562 /* Allow device to power down */
1563 iwl_release_nic_access(priv);
1564 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1565 return pos;
1566 }
1567
1568 /**
1569 * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1570 */
1571 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1572 u32 num_wraps, u32 next_entry,
1573 u32 size, u32 mode,
1574 int pos, char **buf, size_t bufsz)
1575 {
1576 /*
1577 * display the newest DEFAULT_LOG_ENTRIES entries
1578 * i.e the entries just before the next ont that uCode would fill.
1579 */
1580 if (num_wraps) {
1581 if (next_entry < size) {
1582 pos = iwl3945_print_event_log(priv,
1583 capacity - (size - next_entry),
1584 size - next_entry, mode,
1585 pos, buf, bufsz);
1586 pos = iwl3945_print_event_log(priv, 0,
1587 next_entry, mode,
1588 pos, buf, bufsz);
1589 } else
1590 pos = iwl3945_print_event_log(priv, next_entry - size,
1591 size, mode,
1592 pos, buf, bufsz);
1593 } else {
1594 if (next_entry < size)
1595 pos = iwl3945_print_event_log(priv, 0,
1596 next_entry, mode,
1597 pos, buf, bufsz);
1598 else
1599 pos = iwl3945_print_event_log(priv, next_entry - size,
1600 size, mode,
1601 pos, buf, bufsz);
1602 }
1603 return pos;
1604 }
1605
1606 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1607
1608 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1609 char **buf, bool display)
1610 {
1611 u32 base; /* SRAM byte address of event log header */
1612 u32 capacity; /* event log capacity in # entries */
1613 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1614 u32 num_wraps; /* # times uCode wrapped to top of log */
1615 u32 next_entry; /* index of next entry to be written by uCode */
1616 u32 size; /* # entries that we'll print */
1617 int pos = 0;
1618 size_t bufsz = 0;
1619
1620 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1621 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1622 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1623 return -EINVAL;
1624 }
1625
1626 /* event log header */
1627 capacity = iwl_read_targ_mem(priv, base);
1628 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1629 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1630 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1631
1632 if (capacity > priv->cfg->max_event_log_size) {
1633 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1634 capacity, priv->cfg->max_event_log_size);
1635 capacity = priv->cfg->max_event_log_size;
1636 }
1637
1638 if (next_entry > priv->cfg->max_event_log_size) {
1639 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1640 next_entry, priv->cfg->max_event_log_size);
1641 next_entry = priv->cfg->max_event_log_size;
1642 }
1643
1644 size = num_wraps ? capacity : next_entry;
1645
1646 /* bail out if nothing in log */
1647 if (size == 0) {
1648 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1649 return pos;
1650 }
1651
1652 #ifdef CONFIG_IWLWIFI_DEBUG
1653 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1654 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1655 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1656 #else
1657 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1658 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1659 #endif
1660
1661 IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1662 size);
1663
1664 #ifdef CONFIG_IWLWIFI_DEBUG
1665 if (display) {
1666 if (full_log)
1667 bufsz = capacity * 48;
1668 else
1669 bufsz = size * 48;
1670 *buf = kmalloc(bufsz, GFP_KERNEL);
1671 if (!*buf)
1672 return -ENOMEM;
1673 }
1674 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1675 /* if uCode has wrapped back to top of log,
1676 * start at the oldest entry,
1677 * i.e the next one that uCode would fill.
1678 */
1679 if (num_wraps)
1680 pos = iwl3945_print_event_log(priv, next_entry,
1681 capacity - next_entry, mode,
1682 pos, buf, bufsz);
1683
1684 /* (then/else) start at top of log */
1685 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1686 pos, buf, bufsz);
1687 } else
1688 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1689 next_entry, size, mode,
1690 pos, buf, bufsz);
1691 #else
1692 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1693 next_entry, size, mode,
1694 pos, buf, bufsz);
1695 #endif
1696 return pos;
1697 }
1698
1699 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1700 {
1701 u32 inta, handled = 0;
1702 u32 inta_fh;
1703 unsigned long flags;
1704 #ifdef CONFIG_IWLWIFI_DEBUG
1705 u32 inta_mask;
1706 #endif
1707
1708 spin_lock_irqsave(&priv->lock, flags);
1709
1710 /* Ack/clear/reset pending uCode interrupts.
1711 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1712 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1713 inta = iwl_read32(priv, CSR_INT);
1714 iwl_write32(priv, CSR_INT, inta);
1715
1716 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1717 * Any new interrupts that happen after this, either while we're
1718 * in this tasklet, or later, will show up in next ISR/tasklet. */
1719 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1720 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1721
1722 #ifdef CONFIG_IWLWIFI_DEBUG
1723 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1724 /* just for debug */
1725 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1726 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1727 inta, inta_mask, inta_fh);
1728 }
1729 #endif
1730
1731 spin_unlock_irqrestore(&priv->lock, flags);
1732
1733 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1734 * atomic, make sure that inta covers all the interrupts that
1735 * we've discovered, even if FH interrupt came in just after
1736 * reading CSR_INT. */
1737 if (inta_fh & CSR39_FH_INT_RX_MASK)
1738 inta |= CSR_INT_BIT_FH_RX;
1739 if (inta_fh & CSR39_FH_INT_TX_MASK)
1740 inta |= CSR_INT_BIT_FH_TX;
1741
1742 /* Now service all interrupt bits discovered above. */
1743 if (inta & CSR_INT_BIT_HW_ERR) {
1744 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1745
1746 /* Tell the device to stop sending interrupts */
1747 iwl_disable_interrupts(priv);
1748
1749 priv->isr_stats.hw++;
1750 iwl_irq_handle_error(priv);
1751
1752 handled |= CSR_INT_BIT_HW_ERR;
1753
1754 return;
1755 }
1756
1757 #ifdef CONFIG_IWLWIFI_DEBUG
1758 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1759 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1760 if (inta & CSR_INT_BIT_SCD) {
1761 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1762 "the frame/frames.\n");
1763 priv->isr_stats.sch++;
1764 }
1765
1766 /* Alive notification via Rx interrupt will do the real work */
1767 if (inta & CSR_INT_BIT_ALIVE) {
1768 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1769 priv->isr_stats.alive++;
1770 }
1771 }
1772 #endif
1773 /* Safely ignore these bits for debug checks below */
1774 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1775
1776 /* Error detected by uCode */
1777 if (inta & CSR_INT_BIT_SW_ERR) {
1778 IWL_ERR(priv, "Microcode SW error detected. "
1779 "Restarting 0x%X.\n", inta);
1780 priv->isr_stats.sw++;
1781 priv->isr_stats.sw_err = inta;
1782 iwl_irq_handle_error(priv);
1783 handled |= CSR_INT_BIT_SW_ERR;
1784 }
1785
1786 /* uCode wakes up after power-down sleep */
1787 if (inta & CSR_INT_BIT_WAKEUP) {
1788 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1789 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1790 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1791 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1792 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1793 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1794 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1795 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1796
1797 priv->isr_stats.wakeup++;
1798 handled |= CSR_INT_BIT_WAKEUP;
1799 }
1800
1801 /* All uCode command responses, including Tx command responses,
1802 * Rx "responses" (frame-received notification), and other
1803 * notifications from uCode come through here*/
1804 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1805 iwl3945_rx_handle(priv);
1806 priv->isr_stats.rx++;
1807 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1808 }
1809
1810 if (inta & CSR_INT_BIT_FH_TX) {
1811 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1812 priv->isr_stats.tx++;
1813
1814 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1815 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1816 (FH39_SRVC_CHNL), 0x0);
1817 handled |= CSR_INT_BIT_FH_TX;
1818 }
1819
1820 if (inta & ~handled) {
1821 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1822 priv->isr_stats.unhandled++;
1823 }
1824
1825 if (inta & ~priv->inta_mask) {
1826 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1827 inta & ~priv->inta_mask);
1828 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1829 }
1830
1831 /* Re-enable all interrupts */
1832 /* only Re-enable if disabled by irq */
1833 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1834 iwl_enable_interrupts(priv);
1835
1836 #ifdef CONFIG_IWLWIFI_DEBUG
1837 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1838 inta = iwl_read32(priv, CSR_INT);
1839 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1840 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1841 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1842 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1843 }
1844 #endif
1845 }
1846
1847 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1848 enum ieee80211_band band,
1849 u8 is_active, u8 n_probes,
1850 struct iwl3945_scan_channel *scan_ch)
1851 {
1852 struct ieee80211_channel *chan;
1853 const struct ieee80211_supported_band *sband;
1854 const struct iwl_channel_info *ch_info;
1855 u16 passive_dwell = 0;
1856 u16 active_dwell = 0;
1857 int added, i;
1858
1859 sband = iwl_get_hw_mode(priv, band);
1860 if (!sband)
1861 return 0;
1862
1863 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1864 passive_dwell = iwl_get_passive_dwell_time(priv, band);
1865
1866 if (passive_dwell <= active_dwell)
1867 passive_dwell = active_dwell + 1;
1868
1869 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1870 chan = priv->scan_request->channels[i];
1871
1872 if (chan->band != band)
1873 continue;
1874
1875 scan_ch->channel = chan->hw_value;
1876
1877 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1878 if (!is_channel_valid(ch_info)) {
1879 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1880 scan_ch->channel);
1881 continue;
1882 }
1883
1884 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1885 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1886 /* If passive , set up for auto-switch
1887 * and use long active_dwell time.
1888 */
1889 if (!is_active || is_channel_passive(ch_info) ||
1890 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1891 scan_ch->type = 0; /* passive */
1892 if (IWL_UCODE_API(priv->ucode_ver) == 1)
1893 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1894 } else {
1895 scan_ch->type = 1; /* active */
1896 }
1897
1898 /* Set direct probe bits. These may be used both for active
1899 * scan channels (probes gets sent right away),
1900 * or for passive channels (probes get se sent only after
1901 * hearing clear Rx packet).*/
1902 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1903 if (n_probes)
1904 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1905 } else {
1906 /* uCode v1 does not allow setting direct probe bits on
1907 * passive channel. */
1908 if ((scan_ch->type & 1) && n_probes)
1909 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1910 }
1911
1912 /* Set txpower levels to defaults */
1913 scan_ch->tpc.dsp_atten = 110;
1914 /* scan_pwr_info->tpc.dsp_atten; */
1915
1916 /*scan_pwr_info->tpc.tx_gain; */
1917 if (band == IEEE80211_BAND_5GHZ)
1918 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1919 else {
1920 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1921 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1922 * power level:
1923 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1924 */
1925 }
1926
1927 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1928 scan_ch->channel,
1929 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1930 (scan_ch->type & 1) ?
1931 active_dwell : passive_dwell);
1932
1933 scan_ch++;
1934 added++;
1935 }
1936
1937 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1938 return added;
1939 }
1940
1941 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1942 struct ieee80211_rate *rates)
1943 {
1944 int i;
1945
1946 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1947 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1948 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1949 rates[i].hw_value_short = i;
1950 rates[i].flags = 0;
1951 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1952 /*
1953 * If CCK != 1M then set short preamble rate flag.
1954 */
1955 rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1956 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1957 }
1958 }
1959 }
1960
1961 /******************************************************************************
1962 *
1963 * uCode download functions
1964 *
1965 ******************************************************************************/
1966
1967 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1968 {
1969 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1970 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1971 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1972 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1973 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1974 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1975 }
1976
1977 /**
1978 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1979 * looking at all data.
1980 */
1981 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1982 {
1983 u32 val;
1984 u32 save_len = len;
1985 int rc = 0;
1986 u32 errcnt;
1987
1988 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1989
1990 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1991 IWL39_RTC_INST_LOWER_BOUND);
1992
1993 errcnt = 0;
1994 for (; len > 0; len -= sizeof(u32), image++) {
1995 /* read data comes through single port, auto-incr addr */
1996 /* NOTE: Use the debugless read so we don't flood kernel log
1997 * if IWL_DL_IO is set */
1998 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1999 if (val != le32_to_cpu(*image)) {
2000 IWL_ERR(priv, "uCode INST section is invalid at "
2001 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2002 save_len - len, val, le32_to_cpu(*image));
2003 rc = -EIO;
2004 errcnt++;
2005 if (errcnt >= 20)
2006 break;
2007 }
2008 }
2009
2010
2011 if (!errcnt)
2012 IWL_DEBUG_INFO(priv,
2013 "ucode image in INSTRUCTION memory is good\n");
2014
2015 return rc;
2016 }
2017
2018
2019 /**
2020 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2021 * using sample data 100 bytes apart. If these sample points are good,
2022 * it's a pretty good bet that everything between them is good, too.
2023 */
2024 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2025 {
2026 u32 val;
2027 int rc = 0;
2028 u32 errcnt = 0;
2029 u32 i;
2030
2031 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2032
2033 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2034 /* read data comes through single port, auto-incr addr */
2035 /* NOTE: Use the debugless read so we don't flood kernel log
2036 * if IWL_DL_IO is set */
2037 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2038 i + IWL39_RTC_INST_LOWER_BOUND);
2039 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2040 if (val != le32_to_cpu(*image)) {
2041 #if 0 /* Enable this if you want to see details */
2042 IWL_ERR(priv, "uCode INST section is invalid at "
2043 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2044 i, val, *image);
2045 #endif
2046 rc = -EIO;
2047 errcnt++;
2048 if (errcnt >= 3)
2049 break;
2050 }
2051 }
2052
2053 return rc;
2054 }
2055
2056
2057 /**
2058 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2059 * and verify its contents
2060 */
2061 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2062 {
2063 __le32 *image;
2064 u32 len;
2065 int rc = 0;
2066
2067 /* Try bootstrap */
2068 image = (__le32 *)priv->ucode_boot.v_addr;
2069 len = priv->ucode_boot.len;
2070 rc = iwl3945_verify_inst_sparse(priv, image, len);
2071 if (rc == 0) {
2072 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2073 return 0;
2074 }
2075
2076 /* Try initialize */
2077 image = (__le32 *)priv->ucode_init.v_addr;
2078 len = priv->ucode_init.len;
2079 rc = iwl3945_verify_inst_sparse(priv, image, len);
2080 if (rc == 0) {
2081 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2082 return 0;
2083 }
2084
2085 /* Try runtime/protocol */
2086 image = (__le32 *)priv->ucode_code.v_addr;
2087 len = priv->ucode_code.len;
2088 rc = iwl3945_verify_inst_sparse(priv, image, len);
2089 if (rc == 0) {
2090 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2091 return 0;
2092 }
2093
2094 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2095
2096 /* Since nothing seems to match, show first several data entries in
2097 * instruction SRAM, so maybe visual inspection will give a clue.
2098 * Selection of bootstrap image (vs. other images) is arbitrary. */
2099 image = (__le32 *)priv->ucode_boot.v_addr;
2100 len = priv->ucode_boot.len;
2101 rc = iwl3945_verify_inst_full(priv, image, len);
2102
2103 return rc;
2104 }
2105
2106 static void iwl3945_nic_start(struct iwl_priv *priv)
2107 {
2108 /* Remove all resets to allow NIC to operate */
2109 iwl_write32(priv, CSR_RESET, 0);
2110 }
2111
2112 /**
2113 * iwl3945_read_ucode - Read uCode images from disk file.
2114 *
2115 * Copy into buffers for card to fetch via bus-mastering
2116 */
2117 static int iwl3945_read_ucode(struct iwl_priv *priv)
2118 {
2119 const struct iwl_ucode_header *ucode;
2120 int ret = -EINVAL, index;
2121 const struct firmware *ucode_raw;
2122 /* firmware file name contains uCode/driver compatibility version */
2123 const char *name_pre = priv->cfg->fw_name_pre;
2124 const unsigned int api_max = priv->cfg->ucode_api_max;
2125 const unsigned int api_min = priv->cfg->ucode_api_min;
2126 char buf[25];
2127 u8 *src;
2128 size_t len;
2129 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2130
2131 /* Ask kernel firmware_class module to get the boot firmware off disk.
2132 * request_firmware() is synchronous, file is in memory on return. */
2133 for (index = api_max; index >= api_min; index--) {
2134 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2135 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2136 if (ret < 0) {
2137 IWL_ERR(priv, "%s firmware file req failed: %d\n",
2138 buf, ret);
2139 if (ret == -ENOENT)
2140 continue;
2141 else
2142 goto error;
2143 } else {
2144 if (index < api_max)
2145 IWL_ERR(priv, "Loaded firmware %s, "
2146 "which is deprecated. "
2147 " Please use API v%u instead.\n",
2148 buf, api_max);
2149 IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2150 "(%zd bytes) from disk\n",
2151 buf, ucode_raw->size);
2152 break;
2153 }
2154 }
2155
2156 if (ret < 0)
2157 goto error;
2158
2159 /* Make sure that we got at least our header! */
2160 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
2161 IWL_ERR(priv, "File size way too small!\n");
2162 ret = -EINVAL;
2163 goto err_release;
2164 }
2165
2166 /* Data from ucode file: header followed by uCode images */
2167 ucode = (struct iwl_ucode_header *)ucode_raw->data;
2168
2169 priv->ucode_ver = le32_to_cpu(ucode->ver);
2170 api_ver = IWL_UCODE_API(priv->ucode_ver);
2171 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2172 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2173 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2174 init_data_size =
2175 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2176 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2177 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2178
2179 /* api_ver should match the api version forming part of the
2180 * firmware filename ... but we don't check for that and only rely
2181 * on the API version read from firmware header from here on forward */
2182
2183 if (api_ver < api_min || api_ver > api_max) {
2184 IWL_ERR(priv, "Driver unable to support your firmware API. "
2185 "Driver supports v%u, firmware is v%u.\n",
2186 api_max, api_ver);
2187 priv->ucode_ver = 0;
2188 ret = -EINVAL;
2189 goto err_release;
2190 }
2191 if (api_ver != api_max)
2192 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2193 "got %u. New firmware can be obtained "
2194 "from http://www.intellinuxwireless.org.\n",
2195 api_max, api_ver);
2196
2197 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2198 IWL_UCODE_MAJOR(priv->ucode_ver),
2199 IWL_UCODE_MINOR(priv->ucode_ver),
2200 IWL_UCODE_API(priv->ucode_ver),
2201 IWL_UCODE_SERIAL(priv->ucode_ver));
2202
2203 snprintf(priv->hw->wiphy->fw_version,
2204 sizeof(priv->hw->wiphy->fw_version),
2205 "%u.%u.%u.%u",
2206 IWL_UCODE_MAJOR(priv->ucode_ver),
2207 IWL_UCODE_MINOR(priv->ucode_ver),
2208 IWL_UCODE_API(priv->ucode_ver),
2209 IWL_UCODE_SERIAL(priv->ucode_ver));
2210
2211 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2212 priv->ucode_ver);
2213 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2214 inst_size);
2215 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2216 data_size);
2217 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2218 init_size);
2219 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2220 init_data_size);
2221 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2222 boot_size);
2223
2224
2225 /* Verify size of file vs. image size info in file's header */
2226 if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2227 inst_size + data_size + init_size +
2228 init_data_size + boot_size) {
2229
2230 IWL_DEBUG_INFO(priv,
2231 "uCode file size %zd does not match expected size\n",
2232 ucode_raw->size);
2233 ret = -EINVAL;
2234 goto err_release;
2235 }
2236
2237 /* Verify that uCode images will fit in card's SRAM */
2238 if (inst_size > IWL39_MAX_INST_SIZE) {
2239 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2240 inst_size);
2241 ret = -EINVAL;
2242 goto err_release;
2243 }
2244
2245 if (data_size > IWL39_MAX_DATA_SIZE) {
2246 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2247 data_size);
2248 ret = -EINVAL;
2249 goto err_release;
2250 }
2251 if (init_size > IWL39_MAX_INST_SIZE) {
2252 IWL_DEBUG_INFO(priv,
2253 "uCode init instr len %d too large to fit in\n",
2254 init_size);
2255 ret = -EINVAL;
2256 goto err_release;
2257 }
2258 if (init_data_size > IWL39_MAX_DATA_SIZE) {
2259 IWL_DEBUG_INFO(priv,
2260 "uCode init data len %d too large to fit in\n",
2261 init_data_size);
2262 ret = -EINVAL;
2263 goto err_release;
2264 }
2265 if (boot_size > IWL39_MAX_BSM_SIZE) {
2266 IWL_DEBUG_INFO(priv,
2267 "uCode boot instr len %d too large to fit in\n",
2268 boot_size);
2269 ret = -EINVAL;
2270 goto err_release;
2271 }
2272
2273 /* Allocate ucode buffers for card's bus-master loading ... */
2274
2275 /* Runtime instructions and 2 copies of data:
2276 * 1) unmodified from disk
2277 * 2) backup cache for save/restore during power-downs */
2278 priv->ucode_code.len = inst_size;
2279 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2280
2281 priv->ucode_data.len = data_size;
2282 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2283
2284 priv->ucode_data_backup.len = data_size;
2285 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2286
2287 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2288 !priv->ucode_data_backup.v_addr)
2289 goto err_pci_alloc;
2290
2291 /* Initialization instructions and data */
2292 if (init_size && init_data_size) {
2293 priv->ucode_init.len = init_size;
2294 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2295
2296 priv->ucode_init_data.len = init_data_size;
2297 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2298
2299 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2300 goto err_pci_alloc;
2301 }
2302
2303 /* Bootstrap (instructions only, no data) */
2304 if (boot_size) {
2305 priv->ucode_boot.len = boot_size;
2306 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2307
2308 if (!priv->ucode_boot.v_addr)
2309 goto err_pci_alloc;
2310 }
2311
2312 /* Copy images into buffers for card's bus-master reads ... */
2313
2314 /* Runtime instructions (first block of data in file) */
2315 len = inst_size;
2316 IWL_DEBUG_INFO(priv,
2317 "Copying (but not loading) uCode instr len %zd\n", len);
2318 memcpy(priv->ucode_code.v_addr, src, len);
2319 src += len;
2320
2321 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2322 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2323
2324 /* Runtime data (2nd block)
2325 * NOTE: Copy into backup buffer will be done in iwl3945_up() */
2326 len = data_size;
2327 IWL_DEBUG_INFO(priv,
2328 "Copying (but not loading) uCode data len %zd\n", len);
2329 memcpy(priv->ucode_data.v_addr, src, len);
2330 memcpy(priv->ucode_data_backup.v_addr, src, len);
2331 src += len;
2332
2333 /* Initialization instructions (3rd block) */
2334 if (init_size) {
2335 len = init_size;
2336 IWL_DEBUG_INFO(priv,
2337 "Copying (but not loading) init instr len %zd\n", len);
2338 memcpy(priv->ucode_init.v_addr, src, len);
2339 src += len;
2340 }
2341
2342 /* Initialization data (4th block) */
2343 if (init_data_size) {
2344 len = init_data_size;
2345 IWL_DEBUG_INFO(priv,
2346 "Copying (but not loading) init data len %zd\n", len);
2347 memcpy(priv->ucode_init_data.v_addr, src, len);
2348 src += len;
2349 }
2350
2351 /* Bootstrap instructions (5th block) */
2352 len = boot_size;
2353 IWL_DEBUG_INFO(priv,
2354 "Copying (but not loading) boot instr len %zd\n", len);
2355 memcpy(priv->ucode_boot.v_addr, src, len);
2356
2357 /* We have our copies now, allow OS release its copies */
2358 release_firmware(ucode_raw);
2359 return 0;
2360
2361 err_pci_alloc:
2362 IWL_ERR(priv, "failed to allocate pci memory\n");
2363 ret = -ENOMEM;
2364 iwl3945_dealloc_ucode_pci(priv);
2365
2366 err_release:
2367 release_firmware(ucode_raw);
2368
2369 error:
2370 return ret;
2371 }
2372
2373
2374 /**
2375 * iwl3945_set_ucode_ptrs - Set uCode address location
2376 *
2377 * Tell initialization uCode where to find runtime uCode.
2378 *
2379 * BSM registers initially contain pointers to initialization uCode.
2380 * We need to replace them to load runtime uCode inst and data,
2381 * and to save runtime data when powering down.
2382 */
2383 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2384 {
2385 dma_addr_t pinst;
2386 dma_addr_t pdata;
2387
2388 /* bits 31:0 for 3945 */
2389 pinst = priv->ucode_code.p_addr;
2390 pdata = priv->ucode_data_backup.p_addr;
2391
2392 /* Tell bootstrap uCode where to find image to load */
2393 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2394 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2395 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2396 priv->ucode_data.len);
2397
2398 /* Inst byte count must be last to set up, bit 31 signals uCode
2399 * that all new ptr/size info is in place */
2400 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2401 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2402
2403 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2404
2405 return 0;
2406 }
2407
2408 /**
2409 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2410 *
2411 * Called after REPLY_ALIVE notification received from "initialize" uCode.
2412 *
2413 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2414 */
2415 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2416 {
2417 /* Check alive response for "valid" sign from uCode */
2418 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2419 /* We had an error bringing up the hardware, so take it
2420 * all the way back down so we can try again */
2421 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2422 goto restart;
2423 }
2424
2425 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2426 * This is a paranoid check, because we would not have gotten the
2427 * "initialize" alive if code weren't properly loaded. */
2428 if (iwl3945_verify_ucode(priv)) {
2429 /* Runtime instruction load was bad;
2430 * take it all the way back down so we can try again */
2431 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2432 goto restart;
2433 }
2434
2435 /* Send pointers to protocol/runtime uCode image ... init code will
2436 * load and launch runtime uCode, which will send us another "Alive"
2437 * notification. */
2438 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2439 if (iwl3945_set_ucode_ptrs(priv)) {
2440 /* Runtime instruction load won't happen;
2441 * take it all the way back down so we can try again */
2442 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2443 goto restart;
2444 }
2445 return;
2446
2447 restart:
2448 queue_work(priv->workqueue, &priv->restart);
2449 }
2450
2451 /**
2452 * iwl3945_alive_start - called after REPLY_ALIVE notification received
2453 * from protocol/runtime uCode (initialization uCode's
2454 * Alive gets handled by iwl3945_init_alive_start()).
2455 */
2456 static void iwl3945_alive_start(struct iwl_priv *priv)
2457 {
2458 int thermal_spin = 0;
2459 u32 rfkill;
2460
2461 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2462
2463 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2464 /* We had an error bringing up the hardware, so take it
2465 * all the way back down so we can try again */
2466 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2467 goto restart;
2468 }
2469
2470 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2471 * This is a paranoid check, because we would not have gotten the
2472 * "runtime" alive if code weren't properly loaded. */
2473 if (iwl3945_verify_ucode(priv)) {
2474 /* Runtime instruction load was bad;
2475 * take it all the way back down so we can try again */
2476 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2477 goto restart;
2478 }
2479
2480 rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2481 IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2482
2483 if (rfkill & 0x1) {
2484 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2485 /* if RFKILL is not on, then wait for thermal
2486 * sensor in adapter to kick in */
2487 while (iwl3945_hw_get_temperature(priv) == 0) {
2488 thermal_spin++;
2489 udelay(10);
2490 }
2491
2492 if (thermal_spin)
2493 IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2494 thermal_spin * 10);
2495 } else
2496 set_bit(STATUS_RF_KILL_HW, &priv->status);
2497
2498 /* After the ALIVE response, we can send commands to 3945 uCode */
2499 set_bit(STATUS_ALIVE, &priv->status);
2500
2501 if (priv->cfg->ops->lib->recover_from_tx_stall) {
2502 /* Enable timer to monitor the driver queues */
2503 mod_timer(&priv->monitor_recover,
2504 jiffies +
2505 msecs_to_jiffies(priv->cfg->monitor_recover_period));
2506 }
2507
2508 if (iwl_is_rfkill(priv))
2509 return;
2510
2511 ieee80211_wake_queues(priv->hw);
2512
2513 priv->active_rate = IWL_RATES_MASK;
2514
2515 iwl_power_update_mode(priv, true);
2516
2517 if (iwl_is_associated(priv)) {
2518 struct iwl3945_rxon_cmd *active_rxon =
2519 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2520
2521 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2522 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2523 } else {
2524 /* Initialize our rx_config data */
2525 iwl_connection_init_rx_config(priv, priv->iw_mode);
2526 }
2527
2528 /* Configure Bluetooth device coexistence support */
2529 priv->cfg->ops->hcmd->send_bt_config(priv);
2530
2531 /* Configure the adapter for unassociated operation */
2532 iwlcore_commit_rxon(priv);
2533
2534 iwl3945_reg_txpower_periodic(priv);
2535
2536 iwl_leds_init(priv);
2537
2538 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2539 set_bit(STATUS_READY, &priv->status);
2540 wake_up_interruptible(&priv->wait_command_queue);
2541
2542 return;
2543
2544 restart:
2545 queue_work(priv->workqueue, &priv->restart);
2546 }
2547
2548 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2549
2550 static void __iwl3945_down(struct iwl_priv *priv)
2551 {
2552 unsigned long flags;
2553 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2554 struct ieee80211_conf *conf = NULL;
2555
2556 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2557
2558 conf = ieee80211_get_hw_conf(priv->hw);
2559
2560 if (!exit_pending)
2561 set_bit(STATUS_EXIT_PENDING, &priv->status);
2562
2563 /* Station information will now be cleared in device */
2564 iwl_clear_ucode_stations(priv, true);
2565
2566 /* Unblock any waiting calls */
2567 wake_up_interruptible_all(&priv->wait_command_queue);
2568
2569 /* Wipe out the EXIT_PENDING status bit if we are not actually
2570 * exiting the module */
2571 if (!exit_pending)
2572 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2573
2574 /* stop and reset the on-board processor */
2575 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2576
2577 /* tell the device to stop sending interrupts */
2578 spin_lock_irqsave(&priv->lock, flags);
2579 iwl_disable_interrupts(priv);
2580 spin_unlock_irqrestore(&priv->lock, flags);
2581 iwl_synchronize_irq(priv);
2582
2583 if (priv->mac80211_registered)
2584 ieee80211_stop_queues(priv->hw);
2585
2586 /* If we have not previously called iwl3945_init() then
2587 * clear all bits but the RF Kill bits and return */
2588 if (!iwl_is_init(priv)) {
2589 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2590 STATUS_RF_KILL_HW |
2591 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2592 STATUS_GEO_CONFIGURED |
2593 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2594 STATUS_EXIT_PENDING;
2595 goto exit;
2596 }
2597
2598 /* ...otherwise clear out all the status bits but the RF Kill
2599 * bit and continue taking the NIC down. */
2600 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2601 STATUS_RF_KILL_HW |
2602 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2603 STATUS_GEO_CONFIGURED |
2604 test_bit(STATUS_FW_ERROR, &priv->status) <<
2605 STATUS_FW_ERROR |
2606 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2607 STATUS_EXIT_PENDING;
2608
2609 iwl3945_hw_txq_ctx_stop(priv);
2610 iwl3945_hw_rxq_stop(priv);
2611
2612 /* Power-down device's busmaster DMA clocks */
2613 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2614 udelay(5);
2615
2616 /* Stop the device, and put it in low power state */
2617 priv->cfg->ops->lib->apm_ops.stop(priv);
2618
2619 exit:
2620 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2621
2622 if (priv->ibss_beacon)
2623 dev_kfree_skb(priv->ibss_beacon);
2624 priv->ibss_beacon = NULL;
2625
2626 /* clear out any free frames */
2627 iwl3945_clear_free_frames(priv);
2628 }
2629
2630 static void iwl3945_down(struct iwl_priv *priv)
2631 {
2632 mutex_lock(&priv->mutex);
2633 __iwl3945_down(priv);
2634 mutex_unlock(&priv->mutex);
2635
2636 iwl3945_cancel_deferred_work(priv);
2637 }
2638
2639 #define MAX_HW_RESTARTS 5
2640
2641 static int __iwl3945_up(struct iwl_priv *priv)
2642 {
2643 int rc, i;
2644
2645 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2646 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2647 return -EIO;
2648 }
2649
2650 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2651 IWL_ERR(priv, "ucode not available for device bring up\n");
2652 return -EIO;
2653 }
2654
2655 /* If platform's RF_KILL switch is NOT set to KILL */
2656 if (iwl_read32(priv, CSR_GP_CNTRL) &
2657 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2658 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2659 else {
2660 set_bit(STATUS_RF_KILL_HW, &priv->status);
2661 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2662 return -ENODEV;
2663 }
2664
2665 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2666
2667 rc = iwl3945_hw_nic_init(priv);
2668 if (rc) {
2669 IWL_ERR(priv, "Unable to int nic\n");
2670 return rc;
2671 }
2672
2673 /* make sure rfkill handshake bits are cleared */
2674 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2675 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2676 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2677
2678 /* clear (again), then enable host interrupts */
2679 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2680 iwl_enable_interrupts(priv);
2681
2682 /* really make sure rfkill handshake bits are cleared */
2683 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2684 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2685
2686 /* Copy original ucode data image from disk into backup cache.
2687 * This will be used to initialize the on-board processor's
2688 * data SRAM for a clean start when the runtime program first loads. */
2689 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2690 priv->ucode_data.len);
2691
2692 /* We return success when we resume from suspend and rf_kill is on. */
2693 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2694 return 0;
2695
2696 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2697
2698 /* load bootstrap state machine,
2699 * load bootstrap program into processor's memory,
2700 * prepare to load the "initialize" uCode */
2701 rc = priv->cfg->ops->lib->load_ucode(priv);
2702
2703 if (rc) {
2704 IWL_ERR(priv,
2705 "Unable to set up bootstrap uCode: %d\n", rc);
2706 continue;
2707 }
2708
2709 /* start card; "initialize" will load runtime ucode */
2710 iwl3945_nic_start(priv);
2711
2712 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2713
2714 return 0;
2715 }
2716
2717 set_bit(STATUS_EXIT_PENDING, &priv->status);
2718 __iwl3945_down(priv);
2719 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2720
2721 /* tried to restart and config the device for as long as our
2722 * patience could withstand */
2723 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2724 return -EIO;
2725 }
2726
2727
2728 /*****************************************************************************
2729 *
2730 * Workqueue callbacks
2731 *
2732 *****************************************************************************/
2733
2734 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2735 {
2736 struct iwl_priv *priv =
2737 container_of(data, struct iwl_priv, init_alive_start.work);
2738
2739 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2740 return;
2741
2742 mutex_lock(&priv->mutex);
2743 iwl3945_init_alive_start(priv);
2744 mutex_unlock(&priv->mutex);
2745 }
2746
2747 static void iwl3945_bg_alive_start(struct work_struct *data)
2748 {
2749 struct iwl_priv *priv =
2750 container_of(data, struct iwl_priv, alive_start.work);
2751
2752 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2753 return;
2754
2755 mutex_lock(&priv->mutex);
2756 iwl3945_alive_start(priv);
2757 mutex_unlock(&priv->mutex);
2758 }
2759
2760 /*
2761 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2762 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2763 * *is* readable even when device has been SW_RESET into low power mode
2764 * (e.g. during RF KILL).
2765 */
2766 static void iwl3945_rfkill_poll(struct work_struct *data)
2767 {
2768 struct iwl_priv *priv =
2769 container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2770 bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2771 bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2772 & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2773
2774 if (new_rfkill != old_rfkill) {
2775 if (new_rfkill)
2776 set_bit(STATUS_RF_KILL_HW, &priv->status);
2777 else
2778 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2779
2780 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2781
2782 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2783 new_rfkill ? "disable radio" : "enable radio");
2784 }
2785
2786 /* Keep this running, even if radio now enabled. This will be
2787 * cancelled in mac_start() if system decides to start again */
2788 queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2789 round_jiffies_relative(2 * HZ));
2790
2791 }
2792
2793 void iwl3945_request_scan(struct iwl_priv *priv)
2794 {
2795 struct iwl_host_cmd cmd = {
2796 .id = REPLY_SCAN_CMD,
2797 .len = sizeof(struct iwl3945_scan_cmd),
2798 .flags = CMD_SIZE_HUGE,
2799 };
2800 struct iwl3945_scan_cmd *scan;
2801 struct ieee80211_conf *conf = NULL;
2802 u8 n_probes = 0;
2803 enum ieee80211_band band;
2804 bool is_active = false;
2805
2806 conf = ieee80211_get_hw_conf(priv->hw);
2807
2808 cancel_delayed_work(&priv->scan_check);
2809
2810 if (!iwl_is_ready(priv)) {
2811 IWL_WARN(priv, "request scan called when driver not ready.\n");
2812 goto done;
2813 }
2814
2815 /* Make sure the scan wasn't canceled before this queued work
2816 * was given the chance to run... */
2817 if (!test_bit(STATUS_SCANNING, &priv->status))
2818 goto done;
2819
2820 /* This should never be called or scheduled if there is currently
2821 * a scan active in the hardware. */
2822 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2823 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests "
2824 "Ignoring second request.\n");
2825 goto done;
2826 }
2827
2828 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2829 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2830 goto done;
2831 }
2832
2833 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2834 IWL_DEBUG_HC(priv,
2835 "Scan request while abort pending. Queuing.\n");
2836 goto done;
2837 }
2838
2839 if (iwl_is_rfkill(priv)) {
2840 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2841 goto done;
2842 }
2843
2844 if (!test_bit(STATUS_READY, &priv->status)) {
2845 IWL_DEBUG_HC(priv,
2846 "Scan request while uninitialized. Queuing.\n");
2847 goto done;
2848 }
2849
2850 if (!priv->scan_cmd) {
2851 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2852 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2853 if (!priv->scan_cmd) {
2854 IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2855 goto done;
2856 }
2857 }
2858 scan = priv->scan_cmd;
2859 memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2860
2861 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2862 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2863
2864 if (iwl_is_associated(priv)) {
2865 u16 interval = 0;
2866 u32 extra;
2867 u32 suspend_time = 100;
2868 u32 scan_suspend_time = 100;
2869 unsigned long flags;
2870
2871 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2872
2873 spin_lock_irqsave(&priv->lock, flags);
2874 interval = priv->beacon_int;
2875 spin_unlock_irqrestore(&priv->lock, flags);
2876
2877 scan->suspend_time = 0;
2878 scan->max_out_time = cpu_to_le32(200 * 1024);
2879 if (!interval)
2880 interval = suspend_time;
2881 /*
2882 * suspend time format:
2883 * 0-19: beacon interval in usec (time before exec.)
2884 * 20-23: 0
2885 * 24-31: number of beacons (suspend between channels)
2886 */
2887
2888 extra = (suspend_time / interval) << 24;
2889 scan_suspend_time = 0xFF0FFFFF &
2890 (extra | ((suspend_time % interval) * 1024));
2891
2892 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2893 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2894 scan_suspend_time, interval);
2895 }
2896
2897 if (priv->is_internal_short_scan) {
2898 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2899 } else if (priv->scan_request->n_ssids) {
2900 int i, p = 0;
2901 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2902 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2903 /* always does wildcard anyway */
2904 if (!priv->scan_request->ssids[i].ssid_len)
2905 continue;
2906 scan->direct_scan[p].id = WLAN_EID_SSID;
2907 scan->direct_scan[p].len =
2908 priv->scan_request->ssids[i].ssid_len;
2909 memcpy(scan->direct_scan[p].ssid,
2910 priv->scan_request->ssids[i].ssid,
2911 priv->scan_request->ssids[i].ssid_len);
2912 n_probes++;
2913 p++;
2914 }
2915 is_active = true;
2916 } else
2917 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2918
2919 /* We don't build a direct scan probe request; the uCode will do
2920 * that based on the direct_mask added to each channel entry */
2921 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2922 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2923 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2924
2925 /* flags + rate selection */
2926
2927 switch (priv->scan_band) {
2928 case IEEE80211_BAND_2GHZ:
2929 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2930 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2931 scan->good_CRC_th = 0;
2932 band = IEEE80211_BAND_2GHZ;
2933 break;
2934 case IEEE80211_BAND_5GHZ:
2935 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2936 /*
2937 * If active scaning is requested but a certain channel
2938 * is marked passive, we can do active scanning if we
2939 * detect transmissions.
2940 */
2941 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2942 IWL_GOOD_CRC_TH_DISABLED;
2943 band = IEEE80211_BAND_5GHZ;
2944 break;
2945 default:
2946 IWL_WARN(priv, "Invalid scan band\n");
2947 goto done;
2948 }
2949
2950 if (!priv->is_internal_short_scan) {
2951 scan->tx_cmd.len = cpu_to_le16(
2952 iwl_fill_probe_req(priv,
2953 (struct ieee80211_mgmt *)scan->data,
2954 priv->scan_request->ie,
2955 priv->scan_request->ie_len,
2956 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2957 } else {
2958 scan->tx_cmd.len = cpu_to_le16(
2959 iwl_fill_probe_req(priv,
2960 (struct ieee80211_mgmt *)scan->data,
2961 NULL, 0,
2962 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2963 }
2964 /* select Rx antennas */
2965 scan->flags |= iwl3945_get_antenna_flags(priv);
2966
2967 scan->channel_count =
2968 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2969 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2970
2971 if (scan->channel_count == 0) {
2972 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2973 goto done;
2974 }
2975
2976 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2977 scan->channel_count * sizeof(struct iwl3945_scan_channel);
2978 cmd.data = scan;
2979 scan->len = cpu_to_le16(cmd.len);
2980
2981 set_bit(STATUS_SCAN_HW, &priv->status);
2982 if (iwl_send_cmd_sync(priv, &cmd))
2983 goto done;
2984
2985 queue_delayed_work(priv->workqueue, &priv->scan_check,
2986 IWL_SCAN_CHECK_WATCHDOG);
2987
2988 return;
2989
2990 done:
2991 /* can not perform scan make sure we clear scanning
2992 * bits from status so next scan request can be performed.
2993 * if we dont clear scanning status bit here all next scan
2994 * will fail
2995 */
2996 clear_bit(STATUS_SCAN_HW, &priv->status);
2997 clear_bit(STATUS_SCANNING, &priv->status);
2998
2999 /* inform mac80211 scan aborted */
3000 queue_work(priv->workqueue, &priv->scan_completed);
3001 }
3002
3003 static void iwl3945_bg_restart(struct work_struct *data)
3004 {
3005 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3006
3007 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3008 return;
3009
3010 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3011 mutex_lock(&priv->mutex);
3012 priv->vif = NULL;
3013 priv->is_open = 0;
3014 mutex_unlock(&priv->mutex);
3015 iwl3945_down(priv);
3016 ieee80211_restart_hw(priv->hw);
3017 } else {
3018 iwl3945_down(priv);
3019
3020 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3021 return;
3022
3023 mutex_lock(&priv->mutex);
3024 __iwl3945_up(priv);
3025 mutex_unlock(&priv->mutex);
3026 }
3027 }
3028
3029 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3030 {
3031 struct iwl_priv *priv =
3032 container_of(data, struct iwl_priv, rx_replenish);
3033
3034 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035 return;
3036
3037 mutex_lock(&priv->mutex);
3038 iwl3945_rx_replenish(priv);
3039 mutex_unlock(&priv->mutex);
3040 }
3041
3042 void iwl3945_post_associate(struct iwl_priv *priv)
3043 {
3044 int rc = 0;
3045 struct ieee80211_conf *conf = NULL;
3046
3047 if (priv->iw_mode == NL80211_IFTYPE_AP) {
3048 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3049 return;
3050 }
3051
3052
3053 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3054 priv->assoc_id, priv->active_rxon.bssid_addr);
3055
3056 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3057 return;
3058
3059 if (!priv->vif || !priv->is_open)
3060 return;
3061
3062 iwl_scan_cancel_timeout(priv, 200);
3063
3064 conf = ieee80211_get_hw_conf(priv->hw);
3065
3066 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3067 iwlcore_commit_rxon(priv);
3068
3069 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3070 iwl_setup_rxon_timing(priv);
3071 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3072 sizeof(priv->rxon_timing), &priv->rxon_timing);
3073 if (rc)
3074 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3075 "Attempting to continue.\n");
3076
3077 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3078
3079 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3080
3081 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3082 priv->assoc_id, priv->beacon_int);
3083
3084 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3085 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3086 else
3087 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3088
3089 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3090 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3091 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3092 else
3093 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3094
3095 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3096 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3097
3098 }
3099
3100 iwlcore_commit_rxon(priv);
3101
3102 switch (priv->iw_mode) {
3103 case NL80211_IFTYPE_STATION:
3104 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3105 break;
3106
3107 case NL80211_IFTYPE_ADHOC:
3108
3109 priv->assoc_id = 1;
3110 iwl_add_local_station(priv, priv->bssid, false);
3111 iwl3945_sync_sta(priv, IWL_STA_ID,
3112 (priv->band == IEEE80211_BAND_5GHZ) ?
3113 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3114 CMD_ASYNC);
3115 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3116
3117 iwl3945_send_beacon_cmd(priv);
3118
3119 break;
3120
3121 default:
3122 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3123 __func__, priv->iw_mode);
3124 break;
3125 }
3126 }
3127
3128 /*****************************************************************************
3129 *
3130 * mac80211 entry point functions
3131 *
3132 *****************************************************************************/
3133
3134 #define UCODE_READY_TIMEOUT (2 * HZ)
3135
3136 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3137 {
3138 struct iwl_priv *priv = hw->priv;
3139 int ret;
3140
3141 IWL_DEBUG_MAC80211(priv, "enter\n");
3142
3143 /* we should be verifying the device is ready to be opened */
3144 mutex_lock(&priv->mutex);
3145
3146 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3147 * ucode filename and max sizes are card-specific. */
3148
3149 if (!priv->ucode_code.len) {
3150 ret = iwl3945_read_ucode(priv);
3151 if (ret) {
3152 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3153 mutex_unlock(&priv->mutex);
3154 goto out_release_irq;
3155 }
3156 }
3157
3158 ret = __iwl3945_up(priv);
3159
3160 mutex_unlock(&priv->mutex);
3161
3162 if (ret)
3163 goto out_release_irq;
3164
3165 IWL_DEBUG_INFO(priv, "Start UP work.\n");
3166
3167 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3168 * mac80211 will not be run successfully. */
3169 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3170 test_bit(STATUS_READY, &priv->status),
3171 UCODE_READY_TIMEOUT);
3172 if (!ret) {
3173 if (!test_bit(STATUS_READY, &priv->status)) {
3174 IWL_ERR(priv,
3175 "Wait for START_ALIVE timeout after %dms.\n",
3176 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3177 ret = -ETIMEDOUT;
3178 goto out_release_irq;
3179 }
3180 }
3181
3182 /* ucode is running and will send rfkill notifications,
3183 * no need to poll the killswitch state anymore */
3184 cancel_delayed_work(&priv->_3945.rfkill_poll);
3185
3186 iwl_led_start(priv);
3187
3188 priv->is_open = 1;
3189 IWL_DEBUG_MAC80211(priv, "leave\n");
3190 return 0;
3191
3192 out_release_irq:
3193 priv->is_open = 0;
3194 IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3195 return ret;
3196 }
3197
3198 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3199 {
3200 struct iwl_priv *priv = hw->priv;
3201
3202 IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204 if (!priv->is_open) {
3205 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3206 return;
3207 }
3208
3209 priv->is_open = 0;
3210
3211 if (iwl_is_ready_rf(priv)) {
3212 /* stop mac, cancel any scan request and clear
3213 * RXON_FILTER_ASSOC_MSK BIT
3214 */
3215 mutex_lock(&priv->mutex);
3216 iwl_scan_cancel_timeout(priv, 100);
3217 mutex_unlock(&priv->mutex);
3218 }
3219
3220 iwl3945_down(priv);
3221
3222 flush_workqueue(priv->workqueue);
3223
3224 /* start polling the killswitch state again */
3225 queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3226 round_jiffies_relative(2 * HZ));
3227
3228 IWL_DEBUG_MAC80211(priv, "leave\n");
3229 }
3230
3231 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3232 {
3233 struct iwl_priv *priv = hw->priv;
3234
3235 IWL_DEBUG_MAC80211(priv, "enter\n");
3236
3237 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3238 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3239
3240 if (iwl3945_tx_skb(priv, skb))
3241 dev_kfree_skb_any(skb);
3242
3243 IWL_DEBUG_MAC80211(priv, "leave\n");
3244 return NETDEV_TX_OK;
3245 }
3246
3247 void iwl3945_config_ap(struct iwl_priv *priv)
3248 {
3249 int rc = 0;
3250
3251 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3252 return;
3253
3254 /* The following should be done only at AP bring up */
3255 if (!(iwl_is_associated(priv))) {
3256
3257 /* RXON - unassoc (to set timing command) */
3258 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3259 iwlcore_commit_rxon(priv);
3260
3261 /* RXON Timing */
3262 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3263 iwl_setup_rxon_timing(priv);
3264 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3265 sizeof(priv->rxon_timing),
3266 &priv->rxon_timing);
3267 if (rc)
3268 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3269 "Attempting to continue.\n");
3270
3271 /* FIXME: what should be the assoc_id for AP? */
3272 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3273 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3274 priv->staging_rxon.flags |=
3275 RXON_FLG_SHORT_PREAMBLE_MSK;
3276 else
3277 priv->staging_rxon.flags &=
3278 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3279
3280 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3281 if (priv->assoc_capability &
3282 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3283 priv->staging_rxon.flags |=
3284 RXON_FLG_SHORT_SLOT_MSK;
3285 else
3286 priv->staging_rxon.flags &=
3287 ~RXON_FLG_SHORT_SLOT_MSK;
3288
3289 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3290 priv->staging_rxon.flags &=
3291 ~RXON_FLG_SHORT_SLOT_MSK;
3292 }
3293 /* restore RXON assoc */
3294 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3295 iwlcore_commit_rxon(priv);
3296 iwl_add_local_station(priv, iwl_bcast_addr, false);
3297 }
3298 iwl3945_send_beacon_cmd(priv);
3299
3300 /* FIXME - we need to add code here to detect a totally new
3301 * configuration, reset the AP, unassoc, rxon timing, assoc,
3302 * clear sta table, add BCAST sta... */
3303 }
3304
3305 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3306 struct ieee80211_vif *vif,
3307 struct ieee80211_sta *sta,
3308 struct ieee80211_key_conf *key)
3309 {
3310 struct iwl_priv *priv = hw->priv;
3311 const u8 *addr;
3312 int ret = 0;
3313 u8 sta_id = IWL_INVALID_STATION;
3314 u8 static_key;
3315
3316 IWL_DEBUG_MAC80211(priv, "enter\n");
3317
3318 if (iwl3945_mod_params.sw_crypto) {
3319 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3320 return -EOPNOTSUPP;
3321 }
3322
3323 addr = sta ? sta->addr : iwl_bcast_addr;
3324 static_key = !iwl_is_associated(priv);
3325
3326 if (!static_key) {
3327 sta_id = iwl_find_station(priv, addr);
3328 if (sta_id == IWL_INVALID_STATION) {
3329 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3330 addr);
3331 return -EINVAL;
3332 }
3333 }
3334
3335 mutex_lock(&priv->mutex);
3336 iwl_scan_cancel_timeout(priv, 100);
3337
3338 switch (cmd) {
3339 case SET_KEY:
3340 if (static_key)
3341 ret = iwl3945_set_static_key(priv, key);
3342 else
3343 ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3344 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3345 break;
3346 case DISABLE_KEY:
3347 if (static_key)
3348 ret = iwl3945_remove_static_key(priv);
3349 else
3350 ret = iwl3945_clear_sta_key_info(priv, sta_id);
3351 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3352 break;
3353 default:
3354 ret = -EINVAL;
3355 }
3356
3357 mutex_unlock(&priv->mutex);
3358 IWL_DEBUG_MAC80211(priv, "leave\n");
3359
3360 return ret;
3361 }
3362
3363 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3364 struct ieee80211_vif *vif,
3365 struct ieee80211_sta *sta)
3366 {
3367 struct iwl_priv *priv = hw->priv;
3368 int ret;
3369 bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
3370 u8 sta_id;
3371
3372 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3373 sta->addr);
3374
3375 ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3376 &sta_id);
3377 if (ret) {
3378 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3379 sta->addr, ret);
3380 /* Should we return success if return code is EEXIST ? */
3381 return ret;
3382 }
3383
3384 /* Initialize rate scaling */
3385 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3386 sta->addr);
3387 iwl3945_rs_rate_init(priv, sta, sta_id);
3388
3389 return 0;
3390
3391
3392
3393 return ret;
3394 }
3395 /*****************************************************************************
3396 *
3397 * sysfs attributes
3398 *
3399 *****************************************************************************/
3400
3401 #ifdef CONFIG_IWLWIFI_DEBUG
3402
3403 /*
3404 * The following adds a new attribute to the sysfs representation
3405 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3406 * used for controlling the debug level.
3407 *
3408 * See the level definitions in iwl for details.
3409 *
3410 * The debug_level being managed using sysfs below is a per device debug
3411 * level that is used instead of the global debug level if it (the per
3412 * device debug level) is set.
3413 */
3414 static ssize_t show_debug_level(struct device *d,
3415 struct device_attribute *attr, char *buf)
3416 {
3417 struct iwl_priv *priv = dev_get_drvdata(d);
3418 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3419 }
3420 static ssize_t store_debug_level(struct device *d,
3421 struct device_attribute *attr,
3422 const char *buf, size_t count)
3423 {
3424 struct iwl_priv *priv = dev_get_drvdata(d);
3425 unsigned long val;
3426 int ret;
3427
3428 ret = strict_strtoul(buf, 0, &val);
3429 if (ret)
3430 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3431 else {
3432 priv->debug_level = val;
3433 if (iwl_alloc_traffic_mem(priv))
3434 IWL_ERR(priv,
3435 "Not enough memory to generate traffic log\n");
3436 }
3437 return strnlen(buf, count);
3438 }
3439
3440 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3441 show_debug_level, store_debug_level);
3442
3443 #endif /* CONFIG_IWLWIFI_DEBUG */
3444
3445 static ssize_t show_temperature(struct device *d,
3446 struct device_attribute *attr, char *buf)
3447 {
3448 struct iwl_priv *priv = dev_get_drvdata(d);
3449
3450 if (!iwl_is_alive(priv))
3451 return -EAGAIN;
3452
3453 return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3454 }
3455
3456 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3457
3458 static ssize_t show_tx_power(struct device *d,
3459 struct device_attribute *attr, char *buf)
3460 {
3461 struct iwl_priv *priv = dev_get_drvdata(d);
3462 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3463 }
3464
3465 static ssize_t store_tx_power(struct device *d,
3466 struct device_attribute *attr,
3467 const char *buf, size_t count)
3468 {
3469 struct iwl_priv *priv = dev_get_drvdata(d);
3470 char *p = (char *)buf;
3471 u32 val;
3472
3473 val = simple_strtoul(p, &p, 10);
3474 if (p == buf)
3475 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3476 else
3477 iwl3945_hw_reg_set_txpower(priv, val);
3478
3479 return count;
3480 }
3481
3482 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3483
3484 static ssize_t show_flags(struct device *d,
3485 struct device_attribute *attr, char *buf)
3486 {
3487 struct iwl_priv *priv = dev_get_drvdata(d);
3488
3489 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3490 }
3491
3492 static ssize_t store_flags(struct device *d,
3493 struct device_attribute *attr,
3494 const char *buf, size_t count)
3495 {
3496 struct iwl_priv *priv = dev_get_drvdata(d);
3497 u32 flags = simple_strtoul(buf, NULL, 0);
3498
3499 mutex_lock(&priv->mutex);
3500 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3501 /* Cancel any currently running scans... */
3502 if (iwl_scan_cancel_timeout(priv, 100))
3503 IWL_WARN(priv, "Could not cancel scan.\n");
3504 else {
3505 IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3506 flags);
3507 priv->staging_rxon.flags = cpu_to_le32(flags);
3508 iwlcore_commit_rxon(priv);
3509 }
3510 }
3511 mutex_unlock(&priv->mutex);
3512
3513 return count;
3514 }
3515
3516 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3517
3518 static ssize_t show_filter_flags(struct device *d,
3519 struct device_attribute *attr, char *buf)
3520 {
3521 struct iwl_priv *priv = dev_get_drvdata(d);
3522
3523 return sprintf(buf, "0x%04X\n",
3524 le32_to_cpu(priv->active_rxon.filter_flags));
3525 }
3526
3527 static ssize_t store_filter_flags(struct device *d,
3528 struct device_attribute *attr,
3529 const char *buf, size_t count)
3530 {
3531 struct iwl_priv *priv = dev_get_drvdata(d);
3532 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3533
3534 mutex_lock(&priv->mutex);
3535 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3536 /* Cancel any currently running scans... */
3537 if (iwl_scan_cancel_timeout(priv, 100))
3538 IWL_WARN(priv, "Could not cancel scan.\n");
3539 else {
3540 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3541 "0x%04X\n", filter_flags);
3542 priv->staging_rxon.filter_flags =
3543 cpu_to_le32(filter_flags);
3544 iwlcore_commit_rxon(priv);
3545 }
3546 }
3547 mutex_unlock(&priv->mutex);
3548
3549 return count;
3550 }
3551
3552 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3553 store_filter_flags);
3554
3555 static ssize_t show_measurement(struct device *d,
3556 struct device_attribute *attr, char *buf)
3557 {
3558 struct iwl_priv *priv = dev_get_drvdata(d);
3559 struct iwl_spectrum_notification measure_report;
3560 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3561 u8 *data = (u8 *)&measure_report;
3562 unsigned long flags;
3563
3564 spin_lock_irqsave(&priv->lock, flags);
3565 if (!(priv->measurement_status & MEASUREMENT_READY)) {
3566 spin_unlock_irqrestore(&priv->lock, flags);
3567 return 0;
3568 }
3569 memcpy(&measure_report, &priv->measure_report, size);
3570 priv->measurement_status = 0;
3571 spin_unlock_irqrestore(&priv->lock, flags);
3572
3573 while (size && (PAGE_SIZE - len)) {
3574 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3575 PAGE_SIZE - len, 1);
3576 len = strlen(buf);
3577 if (PAGE_SIZE - len)
3578 buf[len++] = '\n';
3579
3580 ofs += 16;
3581 size -= min(size, 16U);
3582 }
3583
3584 return len;
3585 }
3586
3587 static ssize_t store_measurement(struct device *d,
3588 struct device_attribute *attr,
3589 const char *buf, size_t count)
3590 {
3591 struct iwl_priv *priv = dev_get_drvdata(d);
3592 struct ieee80211_measurement_params params = {
3593 .channel = le16_to_cpu(priv->active_rxon.channel),
3594 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3595 .duration = cpu_to_le16(1),
3596 };
3597 u8 type = IWL_MEASURE_BASIC;
3598 u8 buffer[32];
3599 u8 channel;
3600
3601 if (count) {
3602 char *p = buffer;
3603 strncpy(buffer, buf, min(sizeof(buffer), count));
3604 channel = simple_strtoul(p, NULL, 0);
3605 if (channel)
3606 params.channel = channel;
3607
3608 p = buffer;
3609 while (*p && *p != ' ')
3610 p++;
3611 if (*p)
3612 type = simple_strtoul(p + 1, NULL, 0);
3613 }
3614
3615 IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3616 "channel %d (for '%s')\n", type, params.channel, buf);
3617 iwl3945_get_measurement(priv, &params, type);
3618
3619 return count;
3620 }
3621
3622 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3623 show_measurement, store_measurement);
3624
3625 static ssize_t store_retry_rate(struct device *d,
3626 struct device_attribute *attr,
3627 const char *buf, size_t count)
3628 {
3629 struct iwl_priv *priv = dev_get_drvdata(d);
3630
3631 priv->retry_rate = simple_strtoul(buf, NULL, 0);
3632 if (priv->retry_rate <= 0)
3633 priv->retry_rate = 1;
3634
3635 return count;
3636 }
3637
3638 static ssize_t show_retry_rate(struct device *d,
3639 struct device_attribute *attr, char *buf)
3640 {
3641 struct iwl_priv *priv = dev_get_drvdata(d);
3642 return sprintf(buf, "%d", priv->retry_rate);
3643 }
3644
3645 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3646 store_retry_rate);
3647
3648
3649 static ssize_t show_channels(struct device *d,
3650 struct device_attribute *attr, char *buf)
3651 {
3652 /* all this shit doesn't belong into sysfs anyway */
3653 return 0;
3654 }
3655
3656 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3657
3658 static ssize_t show_antenna(struct device *d,
3659 struct device_attribute *attr, char *buf)
3660 {
3661 struct iwl_priv *priv = dev_get_drvdata(d);
3662
3663 if (!iwl_is_alive(priv))
3664 return -EAGAIN;
3665
3666 return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3667 }
3668
3669 static ssize_t store_antenna(struct device *d,
3670 struct device_attribute *attr,
3671 const char *buf, size_t count)
3672 {
3673 struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3674 int ant;
3675
3676 if (count == 0)
3677 return 0;
3678
3679 if (sscanf(buf, "%1i", &ant) != 1) {
3680 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3681 return count;
3682 }
3683
3684 if ((ant >= 0) && (ant <= 2)) {
3685 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3686 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3687 } else
3688 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3689
3690
3691 return count;
3692 }
3693
3694 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3695
3696 static ssize_t show_status(struct device *d,
3697 struct device_attribute *attr, char *buf)
3698 {
3699 struct iwl_priv *priv = dev_get_drvdata(d);
3700 if (!iwl_is_alive(priv))
3701 return -EAGAIN;
3702 return sprintf(buf, "0x%08x\n", (int)priv->status);
3703 }
3704
3705 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3706
3707 static ssize_t dump_error_log(struct device *d,
3708 struct device_attribute *attr,
3709 const char *buf, size_t count)
3710 {
3711 struct iwl_priv *priv = dev_get_drvdata(d);
3712 char *p = (char *)buf;
3713
3714 if (p[0] == '1')
3715 iwl3945_dump_nic_error_log(priv);
3716
3717 return strnlen(buf, count);
3718 }
3719
3720 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3721
3722 /*****************************************************************************
3723 *
3724 * driver setup and tear down
3725 *
3726 *****************************************************************************/
3727
3728 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3729 {
3730 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3731
3732 init_waitqueue_head(&priv->wait_command_queue);
3733
3734 INIT_WORK(&priv->restart, iwl3945_bg_restart);
3735 INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3736 INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3737 INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3738 INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3739 INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3740 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3741 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3742 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3743
3744 iwl3945_hw_setup_deferred_work(priv);
3745
3746 if (priv->cfg->ops->lib->recover_from_tx_stall) {
3747 init_timer(&priv->monitor_recover);
3748 priv->monitor_recover.data = (unsigned long)priv;
3749 priv->monitor_recover.function =
3750 priv->cfg->ops->lib->recover_from_tx_stall;
3751 }
3752
3753 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3754 iwl3945_irq_tasklet, (unsigned long)priv);
3755 }
3756
3757 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3758 {
3759 iwl3945_hw_cancel_deferred_work(priv);
3760
3761 cancel_delayed_work_sync(&priv->init_alive_start);
3762 cancel_delayed_work(&priv->scan_check);
3763 cancel_delayed_work(&priv->alive_start);
3764 cancel_work_sync(&priv->beacon_update);
3765 if (priv->cfg->ops->lib->recover_from_tx_stall)
3766 del_timer_sync(&priv->monitor_recover);
3767 }
3768
3769 static struct attribute *iwl3945_sysfs_entries[] = {
3770 &dev_attr_antenna.attr,
3771 &dev_attr_channels.attr,
3772 &dev_attr_dump_errors.attr,
3773 &dev_attr_flags.attr,
3774 &dev_attr_filter_flags.attr,
3775 &dev_attr_measurement.attr,
3776 &dev_attr_retry_rate.attr,
3777 &dev_attr_status.attr,
3778 &dev_attr_temperature.attr,
3779 &dev_attr_tx_power.attr,
3780 #ifdef CONFIG_IWLWIFI_DEBUG
3781 &dev_attr_debug_level.attr,
3782 #endif
3783 NULL
3784 };
3785
3786 static struct attribute_group iwl3945_attribute_group = {
3787 .name = NULL, /* put in device directory */
3788 .attrs = iwl3945_sysfs_entries,
3789 };
3790
3791 static struct ieee80211_ops iwl3945_hw_ops = {
3792 .tx = iwl3945_mac_tx,
3793 .start = iwl3945_mac_start,
3794 .stop = iwl3945_mac_stop,
3795 .add_interface = iwl_mac_add_interface,
3796 .remove_interface = iwl_mac_remove_interface,
3797 .config = iwl_mac_config,
3798 .configure_filter = iwl_configure_filter,
3799 .set_key = iwl3945_mac_set_key,
3800 .conf_tx = iwl_mac_conf_tx,
3801 .reset_tsf = iwl_mac_reset_tsf,
3802 .bss_info_changed = iwl_bss_info_changed,
3803 .hw_scan = iwl_mac_hw_scan,
3804 .sta_add = iwl3945_mac_sta_add,
3805 .sta_remove = iwl_mac_sta_remove,
3806 };
3807
3808 static int iwl3945_init_drv(struct iwl_priv *priv)
3809 {
3810 int ret;
3811 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3812
3813 priv->retry_rate = 1;
3814 priv->ibss_beacon = NULL;
3815
3816 spin_lock_init(&priv->sta_lock);
3817 spin_lock_init(&priv->hcmd_lock);
3818
3819 INIT_LIST_HEAD(&priv->free_frames);
3820
3821 mutex_init(&priv->mutex);
3822 mutex_init(&priv->sync_cmd_mutex);
3823
3824 priv->ieee_channels = NULL;
3825 priv->ieee_rates = NULL;
3826 priv->band = IEEE80211_BAND_2GHZ;
3827
3828 priv->iw_mode = NL80211_IFTYPE_STATION;
3829 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3830
3831 priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3832
3833 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3834 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3835 eeprom->version);
3836 ret = -EINVAL;
3837 goto err;
3838 }
3839 ret = iwl_init_channel_map(priv);
3840 if (ret) {
3841 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3842 goto err;
3843 }
3844
3845 /* Set up txpower settings in driver for all channels */
3846 if (iwl3945_txpower_set_from_eeprom(priv)) {
3847 ret = -EIO;
3848 goto err_free_channel_map;
3849 }
3850
3851 ret = iwlcore_init_geos(priv);
3852 if (ret) {
3853 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3854 goto err_free_channel_map;
3855 }
3856 iwl3945_init_hw_rates(priv, priv->ieee_rates);
3857
3858 return 0;
3859
3860 err_free_channel_map:
3861 iwl_free_channel_map(priv);
3862 err:
3863 return ret;
3864 }
3865
3866 static int iwl3945_setup_mac(struct iwl_priv *priv)
3867 {
3868 int ret;
3869 struct ieee80211_hw *hw = priv->hw;
3870
3871 hw->rate_control_algorithm = "iwl-3945-rs";
3872 hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3873
3874 /* Tell mac80211 our characteristics */
3875 hw->flags = IEEE80211_HW_SIGNAL_DBM |
3876 IEEE80211_HW_SPECTRUM_MGMT;
3877
3878 if (!priv->cfg->broken_powersave)
3879 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3880 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3881
3882 hw->wiphy->interface_modes =
3883 BIT(NL80211_IFTYPE_STATION) |
3884 BIT(NL80211_IFTYPE_ADHOC);
3885
3886 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3887 WIPHY_FLAG_DISABLE_BEACON_HINTS;
3888
3889 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3890 /* we create the 802.11 header and a zero-length SSID element */
3891 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3892
3893 /* Default value; 4 EDCA QOS priorities */
3894 hw->queues = 4;
3895
3896 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3897 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3898 &priv->bands[IEEE80211_BAND_2GHZ];
3899
3900 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3901 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3902 &priv->bands[IEEE80211_BAND_5GHZ];
3903
3904 ret = ieee80211_register_hw(priv->hw);
3905 if (ret) {
3906 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3907 return ret;
3908 }
3909 priv->mac80211_registered = 1;
3910
3911 return 0;
3912 }
3913
3914 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3915 {
3916 int err = 0;
3917 struct iwl_priv *priv;
3918 struct ieee80211_hw *hw;
3919 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3920 struct iwl3945_eeprom *eeprom;
3921 unsigned long flags;
3922
3923 /***********************
3924 * 1. Allocating HW data
3925 * ********************/
3926
3927 /* mac80211 allocates memory for this device instance, including
3928 * space for this driver's private structure */
3929 hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3930 if (hw == NULL) {
3931 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3932 err = -ENOMEM;
3933 goto out;
3934 }
3935 priv = hw->priv;
3936 SET_IEEE80211_DEV(hw, &pdev->dev);
3937
3938 /*
3939 * Disabling hardware scan means that mac80211 will perform scans
3940 * "the hard way", rather than using device's scan.
3941 */
3942 if (iwl3945_mod_params.disable_hw_scan) {
3943 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3944 iwl3945_hw_ops.hw_scan = NULL;
3945 }
3946
3947
3948 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3949 priv->cfg = cfg;
3950 priv->pci_dev = pdev;
3951 priv->inta_mask = CSR_INI_SET_MASK;
3952
3953 #ifdef CONFIG_IWLWIFI_DEBUG
3954 atomic_set(&priv->restrict_refcnt, 0);
3955 #endif
3956 if (iwl_alloc_traffic_mem(priv))
3957 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3958
3959 /***************************
3960 * 2. Initializing PCI bus
3961 * *************************/
3962 if (pci_enable_device(pdev)) {
3963 err = -ENODEV;
3964 goto out_ieee80211_free_hw;
3965 }
3966
3967 pci_set_master(pdev);
3968
3969 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3970 if (!err)
3971 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3972 if (err) {
3973 IWL_WARN(priv, "No suitable DMA available.\n");
3974 goto out_pci_disable_device;
3975 }
3976
3977 pci_set_drvdata(pdev, priv);
3978 err = pci_request_regions(pdev, DRV_NAME);
3979 if (err)
3980 goto out_pci_disable_device;
3981
3982 /***********************
3983 * 3. Read REV Register
3984 * ********************/
3985 priv->hw_base = pci_iomap(pdev, 0, 0);
3986 if (!priv->hw_base) {
3987 err = -ENODEV;
3988 goto out_pci_release_regions;
3989 }
3990
3991 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3992 (unsigned long long) pci_resource_len(pdev, 0));
3993 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3994
3995 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3996 * PCI Tx retries from interfering with C3 CPU state */
3997 pci_write_config_byte(pdev, 0x41, 0x00);
3998
3999 /* these spin locks will be used in apm_ops.init and EEPROM access
4000 * we should init now
4001 */
4002 spin_lock_init(&priv->reg_lock);
4003 spin_lock_init(&priv->lock);
4004
4005 /*
4006 * stop and reset the on-board processor just in case it is in a
4007 * strange state ... like being left stranded by a primary kernel
4008 * and this is now the kdump kernel trying to start up
4009 */
4010 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4011
4012 /***********************
4013 * 4. Read EEPROM
4014 * ********************/
4015
4016 /* Read the EEPROM */
4017 err = iwl_eeprom_init(priv);
4018 if (err) {
4019 IWL_ERR(priv, "Unable to init EEPROM\n");
4020 goto out_iounmap;
4021 }
4022 /* MAC Address location in EEPROM same for 3945/4965 */
4023 eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4024 memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4025 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4026 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4027
4028 /***********************
4029 * 5. Setup HW Constants
4030 * ********************/
4031 /* Device-specific setup */
4032 if (iwl3945_hw_set_hw_params(priv)) {
4033 IWL_ERR(priv, "failed to set hw settings\n");
4034 goto out_eeprom_free;
4035 }
4036
4037 /***********************
4038 * 6. Setup priv
4039 * ********************/
4040
4041 err = iwl3945_init_drv(priv);
4042 if (err) {
4043 IWL_ERR(priv, "initializing driver failed\n");
4044 goto out_unset_hw_params;
4045 }
4046
4047 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4048 priv->cfg->name);
4049
4050 /***********************
4051 * 7. Setup Services
4052 * ********************/
4053
4054 spin_lock_irqsave(&priv->lock, flags);
4055 iwl_disable_interrupts(priv);
4056 spin_unlock_irqrestore(&priv->lock, flags);
4057
4058 pci_enable_msi(priv->pci_dev);
4059
4060 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4061 IRQF_SHARED, DRV_NAME, priv);
4062 if (err) {
4063 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4064 goto out_disable_msi;
4065 }
4066
4067 err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4068 if (err) {
4069 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4070 goto out_release_irq;
4071 }
4072
4073 iwl_set_rxon_channel(priv,
4074 &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4075 iwl3945_setup_deferred_work(priv);
4076 iwl3945_setup_rx_handlers(priv);
4077 iwl_power_initialize(priv);
4078
4079 /*********************************
4080 * 8. Setup and Register mac80211
4081 * *******************************/
4082
4083 iwl_enable_interrupts(priv);
4084
4085 err = iwl3945_setup_mac(priv);
4086 if (err)
4087 goto out_remove_sysfs;
4088
4089 err = iwl_dbgfs_register(priv, DRV_NAME);
4090 if (err)
4091 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4092
4093 /* Start monitoring the killswitch */
4094 queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4095 2 * HZ);
4096
4097 return 0;
4098
4099 out_remove_sysfs:
4100 destroy_workqueue(priv->workqueue);
4101 priv->workqueue = NULL;
4102 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4103 out_release_irq:
4104 free_irq(priv->pci_dev->irq, priv);
4105 out_disable_msi:
4106 pci_disable_msi(priv->pci_dev);
4107 iwlcore_free_geos(priv);
4108 iwl_free_channel_map(priv);
4109 out_unset_hw_params:
4110 iwl3945_unset_hw_params(priv);
4111 out_eeprom_free:
4112 iwl_eeprom_free(priv);
4113 out_iounmap:
4114 pci_iounmap(pdev, priv->hw_base);
4115 out_pci_release_regions:
4116 pci_release_regions(pdev);
4117 out_pci_disable_device:
4118 pci_set_drvdata(pdev, NULL);
4119 pci_disable_device(pdev);
4120 out_ieee80211_free_hw:
4121 iwl_free_traffic_mem(priv);
4122 ieee80211_free_hw(priv->hw);
4123 out:
4124 return err;
4125 }
4126
4127 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4128 {
4129 struct iwl_priv *priv = pci_get_drvdata(pdev);
4130 unsigned long flags;
4131
4132 if (!priv)
4133 return;
4134
4135 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4136
4137 iwl_dbgfs_unregister(priv);
4138
4139 set_bit(STATUS_EXIT_PENDING, &priv->status);
4140
4141 if (priv->mac80211_registered) {
4142 ieee80211_unregister_hw(priv->hw);
4143 priv->mac80211_registered = 0;
4144 } else {
4145 iwl3945_down(priv);
4146 }
4147
4148 /*
4149 * Make sure device is reset to low power before unloading driver.
4150 * This may be redundant with iwl_down(), but there are paths to
4151 * run iwl_down() without calling apm_ops.stop(), and there are
4152 * paths to avoid running iwl_down() at all before leaving driver.
4153 * This (inexpensive) call *makes sure* device is reset.
4154 */
4155 priv->cfg->ops->lib->apm_ops.stop(priv);
4156
4157 /* make sure we flush any pending irq or
4158 * tasklet for the driver
4159 */
4160 spin_lock_irqsave(&priv->lock, flags);
4161 iwl_disable_interrupts(priv);
4162 spin_unlock_irqrestore(&priv->lock, flags);
4163
4164 iwl_synchronize_irq(priv);
4165
4166 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4167
4168 cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4169
4170 iwl3945_dealloc_ucode_pci(priv);
4171
4172 if (priv->rxq.bd)
4173 iwl3945_rx_queue_free(priv, &priv->rxq);
4174 iwl3945_hw_txq_ctx_free(priv);
4175
4176 iwl3945_unset_hw_params(priv);
4177
4178 /*netif_stop_queue(dev); */
4179 flush_workqueue(priv->workqueue);
4180
4181 /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4182 * priv->workqueue... so we can't take down the workqueue
4183 * until now... */
4184 destroy_workqueue(priv->workqueue);
4185 priv->workqueue = NULL;
4186 iwl_free_traffic_mem(priv);
4187
4188 free_irq(pdev->irq, priv);
4189 pci_disable_msi(pdev);
4190
4191 pci_iounmap(pdev, priv->hw_base);
4192 pci_release_regions(pdev);
4193 pci_disable_device(pdev);
4194 pci_set_drvdata(pdev, NULL);
4195
4196 iwl_free_channel_map(priv);
4197 iwlcore_free_geos(priv);
4198 kfree(priv->scan_cmd);
4199 if (priv->ibss_beacon)
4200 dev_kfree_skb(priv->ibss_beacon);
4201
4202 ieee80211_free_hw(priv->hw);
4203 }
4204
4205
4206 /*****************************************************************************
4207 *
4208 * driver and module entry point
4209 *
4210 *****************************************************************************/
4211
4212 static struct pci_driver iwl3945_driver = {
4213 .name = DRV_NAME,
4214 .id_table = iwl3945_hw_card_ids,
4215 .probe = iwl3945_pci_probe,
4216 .remove = __devexit_p(iwl3945_pci_remove),
4217 #ifdef CONFIG_PM
4218 .suspend = iwl_pci_suspend,
4219 .resume = iwl_pci_resume,
4220 #endif
4221 };
4222
4223 static int __init iwl3945_init(void)
4224 {
4225
4226 int ret;
4227 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4228 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4229
4230 ret = iwl3945_rate_control_register();
4231 if (ret) {
4232 printk(KERN_ERR DRV_NAME
4233 "Unable to register rate control algorithm: %d\n", ret);
4234 return ret;
4235 }
4236
4237 ret = pci_register_driver(&iwl3945_driver);
4238 if (ret) {
4239 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4240 goto error_register;
4241 }
4242
4243 return ret;
4244
4245 error_register:
4246 iwl3945_rate_control_unregister();
4247 return ret;
4248 }
4249
4250 static void __exit iwl3945_exit(void)
4251 {
4252 pci_unregister_driver(&iwl3945_driver);
4253 iwl3945_rate_control_unregister();
4254 }
4255
4256 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4257
4258 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4259 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4260 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4261 MODULE_PARM_DESC(swcrypto,
4262 "using software crypto (default 1 [software])\n");
4263 #ifdef CONFIG_IWLWIFI_DEBUG
4264 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4265 MODULE_PARM_DESC(debug, "debug output mask");
4266 #endif
4267 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4268 int, S_IRUGO);
4269 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4270 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4271 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4272
4273 module_exit(iwl3945_exit);
4274 module_init(iwl3945_init);
kernel-based virtual machine