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iwlwifi: fix syslog message for event log dump size
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
blob4c0e47586896f2b29e9d3512069ad75268570eb9
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/sched.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/ieee80211_radiotap.h>
45 #include <net/mac80211.h>
46
47 #include <asm/div64.h>
48
49 #define DRV_NAME "iwl3945"
50
51 #include "iwl-fh.h"
52 #include "iwl-3945-fh.h"
53 #include "iwl-commands.h"
54 #include "iwl-sta.h"
55 #include "iwl-3945.h"
56 #include "iwl-helpers.h"
57 #include "iwl-core.h"
58 #include "iwl-dev.h"
59
60 /*
61 * module name, copyright, version, etc.
62 */
63
64 #define DRV_DESCRIPTION \
65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
66
67 #ifdef CONFIG_IWLWIFI_DEBUG
68 #define VD "d"
69 #else
70 #define VD
71 #endif
72
73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
74 #define VS "s"
75 #else
76 #define VS
77 #endif
78
79 #define DRV_VERSION IWLWIFI_VERSION VD VS
80 #define DRV_COPYRIGHT "Copyright(c) 2003-2009 Intel Corporation"
81 #define DRV_AUTHOR "<ilw@linux.intel.com>"
82
83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
84 MODULE_VERSION(DRV_VERSION);
85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
86 MODULE_LICENSE("GPL");
87
88 /* module parameters */
89 struct iwl_mod_params iwl3945_mod_params = {
90 .sw_crypto = 1,
91 .restart_fw = 1,
92 /* the rest are 0 by default */
93 };
94
95 /**
96 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
97 * @priv: eeprom and antenna fields are used to determine antenna flags
98 *
99 * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
100 * iwl3945_mod_params.antenna specifies the antenna diversity mode:
101 *
102 * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
103 * IWL_ANTENNA_MAIN - Force MAIN antenna
104 * IWL_ANTENNA_AUX - Force AUX antenna
105 */
106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
107 {
108 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
109
110 switch (iwl3945_mod_params.antenna) {
111 case IWL_ANTENNA_DIVERSITY:
112 return 0;
113
114 case IWL_ANTENNA_MAIN:
115 if (eeprom->antenna_switch_type)
116 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
117 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
118
119 case IWL_ANTENNA_AUX:
120 if (eeprom->antenna_switch_type)
121 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
122 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
123 }
124
125 /* bad antenna selector value */
126 IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
127 iwl3945_mod_params.antenna);
128
129 return 0; /* "diversity" is default if error */
130 }
131
132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
133 struct ieee80211_key_conf *keyconf,
134 u8 sta_id)
135 {
136 unsigned long flags;
137 __le16 key_flags = 0;
138 int ret;
139
140 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
141 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
142
143 if (sta_id == priv->hw_params.bcast_sta_id)
144 key_flags |= STA_KEY_MULTICAST_MSK;
145
146 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
147 keyconf->hw_key_idx = keyconf->keyidx;
148 key_flags &= ~STA_KEY_FLG_INVALID;
149
150 spin_lock_irqsave(&priv->sta_lock, flags);
151 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
152 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
153 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
154 keyconf->keylen);
155
156 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
157 keyconf->keylen);
158
159 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
160 == STA_KEY_FLG_NO_ENC)
161 priv->stations[sta_id].sta.key.key_offset =
162 iwl_get_free_ucode_key_index(priv);
163 /* else, we are overriding an existing key => no need to allocated room
164 * in uCode. */
165
166 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
167 "no space for a new key");
168
169 priv->stations[sta_id].sta.key.key_flags = key_flags;
170 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
171 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
172
173 IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
174
175 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
176
177 spin_unlock_irqrestore(&priv->sta_lock, flags);
178
179 return ret;
180 }
181
182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
183 struct ieee80211_key_conf *keyconf,
184 u8 sta_id)
185 {
186 return -EOPNOTSUPP;
187 }
188
189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
190 struct ieee80211_key_conf *keyconf,
191 u8 sta_id)
192 {
193 return -EOPNOTSUPP;
194 }
195
196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
197 {
198 unsigned long flags;
199
200 spin_lock_irqsave(&priv->sta_lock, flags);
201 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
202 memset(&priv->stations[sta_id].sta.key, 0,
203 sizeof(struct iwl4965_keyinfo));
204 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
205 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
206 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
207 spin_unlock_irqrestore(&priv->sta_lock, flags);
208
209 IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
210 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
211 return 0;
212 }
213
214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
215 struct ieee80211_key_conf *keyconf, u8 sta_id)
216 {
217 int ret = 0;
218
219 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
220
221 switch (keyconf->alg) {
222 case ALG_CCMP:
223 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
224 break;
225 case ALG_TKIP:
226 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
227 break;
228 case ALG_WEP:
229 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
230 break;
231 default:
232 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
233 ret = -EINVAL;
234 }
235
236 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
237 keyconf->alg, keyconf->keylen, keyconf->keyidx,
238 sta_id, ret);
239
240 return ret;
241 }
242
243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
244 {
245 int ret = -EOPNOTSUPP;
246
247 return ret;
248 }
249
250 static int iwl3945_set_static_key(struct iwl_priv *priv,
251 struct ieee80211_key_conf *key)
252 {
253 if (key->alg == ALG_WEP)
254 return -EOPNOTSUPP;
255
256 IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
257 return -EINVAL;
258 }
259
260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
261 {
262 struct list_head *element;
263
264 IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
265 priv->frames_count);
266
267 while (!list_empty(&priv->free_frames)) {
268 element = priv->free_frames.next;
269 list_del(element);
270 kfree(list_entry(element, struct iwl3945_frame, list));
271 priv->frames_count--;
272 }
273
274 if (priv->frames_count) {
275 IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
276 priv->frames_count);
277 priv->frames_count = 0;
278 }
279 }
280
281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
282 {
283 struct iwl3945_frame *frame;
284 struct list_head *element;
285 if (list_empty(&priv->free_frames)) {
286 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
287 if (!frame) {
288 IWL_ERR(priv, "Could not allocate frame!\n");
289 return NULL;
290 }
291
292 priv->frames_count++;
293 return frame;
294 }
295
296 element = priv->free_frames.next;
297 list_del(element);
298 return list_entry(element, struct iwl3945_frame, list);
299 }
300
301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
302 {
303 memset(frame, 0, sizeof(*frame));
304 list_add(&frame->list, &priv->free_frames);
305 }
306
307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
308 struct ieee80211_hdr *hdr,
309 int left)
310 {
311
312 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
313 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
314 (priv->iw_mode != NL80211_IFTYPE_AP)))
315 return 0;
316
317 if (priv->ibss_beacon->len > left)
318 return 0;
319
320 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
321
322 return priv->ibss_beacon->len;
323 }
324
325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
326 {
327 struct iwl3945_frame *frame;
328 unsigned int frame_size;
329 int rc;
330 u8 rate;
331
332 frame = iwl3945_get_free_frame(priv);
333
334 if (!frame) {
335 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
336 "command.\n");
337 return -ENOMEM;
338 }
339
340 rate = iwl_rate_get_lowest_plcp(priv);
341
342 frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
343
344 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
345 &frame->u.cmd[0]);
346
347 iwl3945_free_frame(priv, frame);
348
349 return rc;
350 }
351
352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
353 {
354 if (priv->shared_virt)
355 pci_free_consistent(priv->pci_dev,
356 sizeof(struct iwl3945_shared),
357 priv->shared_virt,
358 priv->shared_phys);
359 }
360
361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
362 struct ieee80211_tx_info *info,
363 struct iwl_device_cmd *cmd,
364 struct sk_buff *skb_frag,
365 int sta_id)
366 {
367 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
368 struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
369
370 switch (keyinfo->alg) {
371 case ALG_CCMP:
372 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
373 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
374 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
375 break;
376
377 case ALG_TKIP:
378 break;
379
380 case ALG_WEP:
381 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
382 (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
383
384 if (keyinfo->keylen == 13)
385 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
386
387 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
388
389 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
390 "with key %d\n", info->control.hw_key->hw_key_idx);
391 break;
392
393 default:
394 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
395 break;
396 }
397 }
398
399 /*
400 * handle build REPLY_TX command notification.
401 */
402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
403 struct iwl_device_cmd *cmd,
404 struct ieee80211_tx_info *info,
405 struct ieee80211_hdr *hdr, u8 std_id)
406 {
407 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
408 __le32 tx_flags = tx_cmd->tx_flags;
409 __le16 fc = hdr->frame_control;
410
411 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
412 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
413 tx_flags |= TX_CMD_FLG_ACK_MSK;
414 if (ieee80211_is_mgmt(fc))
415 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
416 if (ieee80211_is_probe_resp(fc) &&
417 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
418 tx_flags |= TX_CMD_FLG_TSF_MSK;
419 } else {
420 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
421 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
422 }
423
424 tx_cmd->sta_id = std_id;
425 if (ieee80211_has_morefrags(fc))
426 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
427
428 if (ieee80211_is_data_qos(fc)) {
429 u8 *qc = ieee80211_get_qos_ctl(hdr);
430 tx_cmd->tid_tspec = qc[0] & 0xf;
431 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
432 } else {
433 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
434 }
435
436 priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
437
438 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
439 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
440
441 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
442 if (ieee80211_is_mgmt(fc)) {
443 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
444 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
445 else
446 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
447 } else {
448 tx_cmd->timeout.pm_frame_timeout = 0;
449 }
450
451 tx_cmd->driver_txop = 0;
452 tx_cmd->tx_flags = tx_flags;
453 tx_cmd->next_frame_len = 0;
454 }
455
456 /*
457 * start REPLY_TX command process
458 */
459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
460 {
461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
462 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
463 struct iwl3945_tx_cmd *tx_cmd;
464 struct iwl_tx_queue *txq = NULL;
465 struct iwl_queue *q = NULL;
466 struct iwl_device_cmd *out_cmd;
467 struct iwl_cmd_meta *out_meta;
468 dma_addr_t phys_addr;
469 dma_addr_t txcmd_phys;
470 int txq_id = skb_get_queue_mapping(skb);
471 u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
472 u8 id;
473 u8 unicast;
474 u8 sta_id;
475 u8 tid = 0;
476 u16 seq_number = 0;
477 __le16 fc;
478 u8 wait_write_ptr = 0;
479 u8 *qc = NULL;
480 unsigned long flags;
481 int rc;
482
483 spin_lock_irqsave(&priv->lock, flags);
484 if (iwl_is_rfkill(priv)) {
485 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
486 goto drop_unlock;
487 }
488
489 if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
490 IWL_ERR(priv, "ERROR: No TX rate available.\n");
491 goto drop_unlock;
492 }
493
494 unicast = !is_multicast_ether_addr(hdr->addr1);
495 id = 0;
496
497 fc = hdr->frame_control;
498
499 #ifdef CONFIG_IWLWIFI_DEBUG
500 if (ieee80211_is_auth(fc))
501 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
502 else if (ieee80211_is_assoc_req(fc))
503 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
504 else if (ieee80211_is_reassoc_req(fc))
505 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
506 #endif
507
508 /* drop all non-injected data frame if we are not associated */
509 if (ieee80211_is_data(fc) &&
510 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
511 (!iwl_is_associated(priv) ||
512 ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
513 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
514 goto drop_unlock;
515 }
516
517 spin_unlock_irqrestore(&priv->lock, flags);
518
519 hdr_len = ieee80211_hdrlen(fc);
520
521 /* Find (or create) index into station table for destination station */
522 if (info->flags & IEEE80211_TX_CTL_INJECTED)
523 sta_id = priv->hw_params.bcast_sta_id;
524 else
525 sta_id = iwl_get_sta_id(priv, hdr);
526 if (sta_id == IWL_INVALID_STATION) {
527 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
528 hdr->addr1);
529 goto drop;
530 }
531
532 IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
533
534 if (ieee80211_is_data_qos(fc)) {
535 qc = ieee80211_get_qos_ctl(hdr);
536 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
537 if (unlikely(tid >= MAX_TID_COUNT))
538 goto drop;
539 seq_number = priv->stations[sta_id].tid[tid].seq_number &
540 IEEE80211_SCTL_SEQ;
541 hdr->seq_ctrl = cpu_to_le16(seq_number) |
542 (hdr->seq_ctrl &
543 cpu_to_le16(IEEE80211_SCTL_FRAG));
544 seq_number += 0x10;
545 }
546
547 /* Descriptor for chosen Tx queue */
548 txq = &priv->txq[txq_id];
549 q = &txq->q;
550
551 spin_lock_irqsave(&priv->lock, flags);
552
553 idx = get_cmd_index(q, q->write_ptr, 0);
554
555 /* Set up driver data for this TFD */
556 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
557 txq->txb[q->write_ptr].skb[0] = skb;
558
559 /* Init first empty entry in queue's array of Tx/cmd buffers */
560 out_cmd = txq->cmd[idx];
561 out_meta = &txq->meta[idx];
562 tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
563 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
564 memset(tx_cmd, 0, sizeof(*tx_cmd));
565
566 /*
567 * Set up the Tx-command (not MAC!) header.
568 * Store the chosen Tx queue and TFD index within the sequence field;
569 * after Tx, uCode's Tx response will return this value so driver can
570 * locate the frame within the tx queue and do post-tx processing.
571 */
572 out_cmd->hdr.cmd = REPLY_TX;
573 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
574 INDEX_TO_SEQ(q->write_ptr)));
575
576 /* Copy MAC header from skb into command buffer */
577 memcpy(tx_cmd->hdr, hdr, hdr_len);
578
579
580 if (info->control.hw_key)
581 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
582
583 /* TODO need this for burst mode later on */
584 iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
585
586 /* set is_hcca to 0; it probably will never be implemented */
587 iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
588
589 /* Total # bytes to be transmitted */
590 len = (u16)skb->len;
591 tx_cmd->len = cpu_to_le16(len);
592
593 iwl_dbg_log_tx_data_frame(priv, len, hdr);
594 iwl_update_stats(priv, true, fc, len);
595 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
596 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
597
598 if (!ieee80211_has_morefrags(hdr->frame_control)) {
599 txq->need_update = 1;
600 if (qc)
601 priv->stations[sta_id].tid[tid].seq_number = seq_number;
602 } else {
603 wait_write_ptr = 1;
604 txq->need_update = 0;
605 }
606
607 IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
608 le16_to_cpu(out_cmd->hdr.sequence));
609 IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
610 iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
611 iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
612 ieee80211_hdrlen(fc));
613
614 /*
615 * Use the first empty entry in this queue's command buffer array
616 * to contain the Tx command and MAC header concatenated together
617 * (payload data will be in another buffer).
618 * Size of this varies, due to varying MAC header length.
619 * If end is not dword aligned, we'll have 2 extra bytes at the end
620 * of the MAC header (device reads on dword boundaries).
621 * We'll tell device about this padding later.
622 */
623 len = sizeof(struct iwl3945_tx_cmd) +
624 sizeof(struct iwl_cmd_header) + hdr_len;
625
626 len_org = len;
627 len = (len + 3) & ~3;
628
629 if (len_org != len)
630 len_org = 1;
631 else
632 len_org = 0;
633
634 /* Physical address of this Tx command's header (not MAC header!),
635 * within command buffer array. */
636 txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
637 len, PCI_DMA_TODEVICE);
638 /* we do not map meta data ... so we can safely access address to
639 * provide to unmap command*/
640 pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
641 pci_unmap_len_set(out_meta, len, len);
642
643 /* Add buffer containing Tx command and MAC(!) header to TFD's
644 * first entry */
645 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
646 txcmd_phys, len, 1, 0);
647
648
649 /* Set up TFD's 2nd entry to point directly to remainder of skb,
650 * if any (802.11 null frames have no payload). */
651 len = skb->len - hdr_len;
652 if (len) {
653 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
654 len, PCI_DMA_TODEVICE);
655 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
656 phys_addr, len,
657 0, U32_PAD(len));
658 }
659
660
661 /* Tell device the write index *just past* this latest filled TFD */
662 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
663 rc = iwl_txq_update_write_ptr(priv, txq);
664 spin_unlock_irqrestore(&priv->lock, flags);
665
666 if (rc)
667 return rc;
668
669 if ((iwl_queue_space(q) < q->high_mark)
670 && priv->mac80211_registered) {
671 if (wait_write_ptr) {
672 spin_lock_irqsave(&priv->lock, flags);
673 txq->need_update = 1;
674 iwl_txq_update_write_ptr(priv, txq);
675 spin_unlock_irqrestore(&priv->lock, flags);
676 }
677
678 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
679 }
680
681 return 0;
682
683 drop_unlock:
684 spin_unlock_irqrestore(&priv->lock, flags);
685 drop:
686 return -1;
687 }
688
689 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
690
691 #include "iwl-spectrum.h"
692
693 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
694 #define BEACON_TIME_MASK_HIGH 0xFF000000
695 #define TIME_UNIT 1024
696
697 /*
698 * extended beacon time format
699 * time in usec will be changed into a 32-bit value in 8:24 format
700 * the high 1 byte is the beacon counts
701 * the lower 3 bytes is the time in usec within one beacon interval
702 */
703
704 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
705 {
706 u32 quot;
707 u32 rem;
708 u32 interval = beacon_interval * 1024;
709
710 if (!interval || !usec)
711 return 0;
712
713 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
714 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
715
716 return (quot << 24) + rem;
717 }
718
719 /* base is usually what we get from ucode with each received frame,
720 * the same as HW timer counter counting down
721 */
722
723 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
724 {
725 u32 base_low = base & BEACON_TIME_MASK_LOW;
726 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
727 u32 interval = beacon_interval * TIME_UNIT;
728 u32 res = (base & BEACON_TIME_MASK_HIGH) +
729 (addon & BEACON_TIME_MASK_HIGH);
730
731 if (base_low > addon_low)
732 res += base_low - addon_low;
733 else if (base_low < addon_low) {
734 res += interval + base_low - addon_low;
735 res += (1 << 24);
736 } else
737 res += (1 << 24);
738
739 return cpu_to_le32(res);
740 }
741
742 static int iwl3945_get_measurement(struct iwl_priv *priv,
743 struct ieee80211_measurement_params *params,
744 u8 type)
745 {
746 struct iwl_spectrum_cmd spectrum;
747 struct iwl_rx_packet *pkt;
748 struct iwl_host_cmd cmd = {
749 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
750 .data = (void *)&spectrum,
751 .flags = CMD_WANT_SKB,
752 };
753 u32 add_time = le64_to_cpu(params->start_time);
754 int rc;
755 int spectrum_resp_status;
756 int duration = le16_to_cpu(params->duration);
757
758 if (iwl_is_associated(priv))
759 add_time =
760 iwl3945_usecs_to_beacons(
761 le64_to_cpu(params->start_time) - priv->last_tsf,
762 le16_to_cpu(priv->rxon_timing.beacon_interval));
763
764 memset(&spectrum, 0, sizeof(spectrum));
765
766 spectrum.channel_count = cpu_to_le16(1);
767 spectrum.flags =
768 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
769 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
770 cmd.len = sizeof(spectrum);
771 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
772
773 if (iwl_is_associated(priv))
774 spectrum.start_time =
775 iwl3945_add_beacon_time(priv->last_beacon_time,
776 add_time,
777 le16_to_cpu(priv->rxon_timing.beacon_interval));
778 else
779 spectrum.start_time = 0;
780
781 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
782 spectrum.channels[0].channel = params->channel;
783 spectrum.channels[0].type = type;
784 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
785 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
786 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
787
788 rc = iwl_send_cmd_sync(priv, &cmd);
789 if (rc)
790 return rc;
791
792 pkt = (struct iwl_rx_packet *)cmd.reply_page;
793 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
794 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
795 rc = -EIO;
796 }
797
798 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
799 switch (spectrum_resp_status) {
800 case 0: /* Command will be handled */
801 if (pkt->u.spectrum.id != 0xff) {
802 IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
803 pkt->u.spectrum.id);
804 priv->measurement_status &= ~MEASUREMENT_READY;
805 }
806 priv->measurement_status |= MEASUREMENT_ACTIVE;
807 rc = 0;
808 break;
809
810 case 1: /* Command will not be handled */
811 rc = -EAGAIN;
812 break;
813 }
814
815 iwl_free_pages(priv, cmd.reply_page);
816
817 return rc;
818 }
819 #endif
820
821 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
822 struct iwl_rx_mem_buffer *rxb)
823 {
824 struct iwl_rx_packet *pkt = rxb_addr(rxb);
825 struct iwl_alive_resp *palive;
826 struct delayed_work *pwork;
827
828 palive = &pkt->u.alive_frame;
829
830 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
831 "0x%01X 0x%01X\n",
832 palive->is_valid, palive->ver_type,
833 palive->ver_subtype);
834
835 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
836 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
837 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
838 sizeof(struct iwl_alive_resp));
839 pwork = &priv->init_alive_start;
840 } else {
841 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
842 memcpy(&priv->card_alive, &pkt->u.alive_frame,
843 sizeof(struct iwl_alive_resp));
844 pwork = &priv->alive_start;
845 iwl3945_disable_events(priv);
846 }
847
848 /* We delay the ALIVE response by 5ms to
849 * give the HW RF Kill time to activate... */
850 if (palive->is_valid == UCODE_VALID_OK)
851 queue_delayed_work(priv->workqueue, pwork,
852 msecs_to_jiffies(5));
853 else
854 IWL_WARN(priv, "uCode did not respond OK.\n");
855 }
856
857 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
858 struct iwl_rx_mem_buffer *rxb)
859 {
860 #ifdef CONFIG_IWLWIFI_DEBUG
861 struct iwl_rx_packet *pkt = rxb_addr(rxb);
862 #endif
863
864 IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
865 return;
866 }
867
868 static void iwl3945_bg_beacon_update(struct work_struct *work)
869 {
870 struct iwl_priv *priv =
871 container_of(work, struct iwl_priv, beacon_update);
872 struct sk_buff *beacon;
873
874 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
875 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
876
877 if (!beacon) {
878 IWL_ERR(priv, "update beacon failed\n");
879 return;
880 }
881
882 mutex_lock(&priv->mutex);
883 /* new beacon skb is allocated every time; dispose previous.*/
884 if (priv->ibss_beacon)
885 dev_kfree_skb(priv->ibss_beacon);
886
887 priv->ibss_beacon = beacon;
888 mutex_unlock(&priv->mutex);
889
890 iwl3945_send_beacon_cmd(priv);
891 }
892
893 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
894 struct iwl_rx_mem_buffer *rxb)
895 {
896 #ifdef CONFIG_IWLWIFI_DEBUG
897 struct iwl_rx_packet *pkt = rxb_addr(rxb);
898 struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
899 u8 rate = beacon->beacon_notify_hdr.rate;
900
901 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
902 "tsf %d %d rate %d\n",
903 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
904 beacon->beacon_notify_hdr.failure_frame,
905 le32_to_cpu(beacon->ibss_mgr_status),
906 le32_to_cpu(beacon->high_tsf),
907 le32_to_cpu(beacon->low_tsf), rate);
908 #endif
909
910 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
911 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
912 queue_work(priv->workqueue, &priv->beacon_update);
913 }
914
915 /* Handle notification from uCode that card's power state is changing
916 * due to software, hardware, or critical temperature RFKILL */
917 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
918 struct iwl_rx_mem_buffer *rxb)
919 {
920 struct iwl_rx_packet *pkt = rxb_addr(rxb);
921 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
922 unsigned long status = priv->status;
923
924 IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
925 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
926 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
927
928 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
929 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
930
931 if (flags & HW_CARD_DISABLED)
932 set_bit(STATUS_RF_KILL_HW, &priv->status);
933 else
934 clear_bit(STATUS_RF_KILL_HW, &priv->status);
935
936
937 iwl_scan_cancel(priv);
938
939 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
940 test_bit(STATUS_RF_KILL_HW, &priv->status)))
941 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
942 test_bit(STATUS_RF_KILL_HW, &priv->status));
943 else
944 wake_up_interruptible(&priv->wait_command_queue);
945 }
946
947 /**
948 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
949 *
950 * Setup the RX handlers for each of the reply types sent from the uCode
951 * to the host.
952 *
953 * This function chains into the hardware specific files for them to setup
954 * any hardware specific handlers as well.
955 */
956 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
957 {
958 priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
959 priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
960 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
961 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
962 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
963 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
964 iwl_rx_pm_debug_statistics_notif;
965 priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
966
967 /*
968 * The same handler is used for both the REPLY to a discrete
969 * statistics request from the host as well as for the periodic
970 * statistics notifications (after received beacons) from the uCode.
971 */
972 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
973 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
974
975 iwl_setup_spectrum_handlers(priv);
976 iwl_setup_rx_scan_handlers(priv);
977 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
978
979 /* Set up hardware specific Rx handlers */
980 iwl3945_hw_rx_handler_setup(priv);
981 }
982
983 /************************** RX-FUNCTIONS ****************************/
984 /*
985 * Rx theory of operation
986 *
987 * The host allocates 32 DMA target addresses and passes the host address
988 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
989 * 0 to 31
990 *
991 * Rx Queue Indexes
992 * The host/firmware share two index registers for managing the Rx buffers.
993 *
994 * The READ index maps to the first position that the firmware may be writing
995 * to -- the driver can read up to (but not including) this position and get
996 * good data.
997 * The READ index is managed by the firmware once the card is enabled.
998 *
999 * The WRITE index maps to the last position the driver has read from -- the
1000 * position preceding WRITE is the last slot the firmware can place a packet.
1001 *
1002 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1003 * WRITE = READ.
1004 *
1005 * During initialization, the host sets up the READ queue position to the first
1006 * INDEX position, and WRITE to the last (READ - 1 wrapped)
1007 *
1008 * When the firmware places a packet in a buffer, it will advance the READ index
1009 * and fire the RX interrupt. The driver can then query the READ index and
1010 * process as many packets as possible, moving the WRITE index forward as it
1011 * resets the Rx queue buffers with new memory.
1012 *
1013 * The management in the driver is as follows:
1014 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
1015 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1016 * to replenish the iwl->rxq->rx_free.
1017 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1018 * iwl->rxq is replenished and the READ INDEX is updated (updating the
1019 * 'processed' and 'read' driver indexes as well)
1020 * + A received packet is processed and handed to the kernel network stack,
1021 * detached from the iwl->rxq. The driver 'processed' index is updated.
1022 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1023 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1024 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
1025 * were enough free buffers and RX_STALLED is set it is cleared.
1026 *
1027 *
1028 * Driver sequence:
1029 *
1030 * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
1031 * iwl3945_rx_queue_restock
1032 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1033 * queue, updates firmware pointers, and updates
1034 * the WRITE index. If insufficient rx_free buffers
1035 * are available, schedules iwl3945_rx_replenish
1036 *
1037 * -- enable interrupts --
1038 * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
1039 * READ INDEX, detaching the SKB from the pool.
1040 * Moves the packet buffer from queue to rx_used.
1041 * Calls iwl3945_rx_queue_restock to refill any empty
1042 * slots.
1043 * ...
1044 *
1045 */
1046
1047 /**
1048 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1049 */
1050 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1051 dma_addr_t dma_addr)
1052 {
1053 return cpu_to_le32((u32)dma_addr);
1054 }
1055
1056 /**
1057 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1058 *
1059 * If there are slots in the RX queue that need to be restocked,
1060 * and we have free pre-allocated buffers, fill the ranks as much
1061 * as we can, pulling from rx_free.
1062 *
1063 * This moves the 'write' index forward to catch up with 'processed', and
1064 * also updates the memory address in the firmware to reference the new
1065 * target buffer.
1066 */
1067 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1068 {
1069 struct iwl_rx_queue *rxq = &priv->rxq;
1070 struct list_head *element;
1071 struct iwl_rx_mem_buffer *rxb;
1072 unsigned long flags;
1073 int write, rc;
1074
1075 spin_lock_irqsave(&rxq->lock, flags);
1076 write = rxq->write & ~0x7;
1077 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1078 /* Get next free Rx buffer, remove from free list */
1079 element = rxq->rx_free.next;
1080 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1081 list_del(element);
1082
1083 /* Point to Rx buffer via next RBD in circular buffer */
1084 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1085 rxq->queue[rxq->write] = rxb;
1086 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1087 rxq->free_count--;
1088 }
1089 spin_unlock_irqrestore(&rxq->lock, flags);
1090 /* If the pre-allocated buffer pool is dropping low, schedule to
1091 * refill it */
1092 if (rxq->free_count <= RX_LOW_WATERMARK)
1093 queue_work(priv->workqueue, &priv->rx_replenish);
1094
1095
1096 /* If we've added more space for the firmware to place data, tell it.
1097 * Increment device's write pointer in multiples of 8. */
1098 if ((rxq->write_actual != (rxq->write & ~0x7))
1099 || (abs(rxq->write - rxq->read) > 7)) {
1100 spin_lock_irqsave(&rxq->lock, flags);
1101 rxq->need_update = 1;
1102 spin_unlock_irqrestore(&rxq->lock, flags);
1103 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1104 if (rc)
1105 return rc;
1106 }
1107
1108 return 0;
1109 }
1110
1111 /**
1112 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1113 *
1114 * When moving to rx_free an SKB is allocated for the slot.
1115 *
1116 * Also restock the Rx queue via iwl3945_rx_queue_restock.
1117 * This is called as a scheduled work item (except for during initialization)
1118 */
1119 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1120 {
1121 struct iwl_rx_queue *rxq = &priv->rxq;
1122 struct list_head *element;
1123 struct iwl_rx_mem_buffer *rxb;
1124 struct page *page;
1125 unsigned long flags;
1126 gfp_t gfp_mask = priority;
1127
1128 while (1) {
1129 spin_lock_irqsave(&rxq->lock, flags);
1130
1131 if (list_empty(&rxq->rx_used)) {
1132 spin_unlock_irqrestore(&rxq->lock, flags);
1133 return;
1134 }
1135 spin_unlock_irqrestore(&rxq->lock, flags);
1136
1137 if (rxq->free_count > RX_LOW_WATERMARK)
1138 gfp_mask |= __GFP_NOWARN;
1139
1140 if (priv->hw_params.rx_page_order > 0)
1141 gfp_mask |= __GFP_COMP;
1142
1143 /* Alloc a new receive buffer */
1144 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1145 if (!page) {
1146 if (net_ratelimit())
1147 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1148 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1149 net_ratelimit())
1150 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1151 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
1152 rxq->free_count);
1153 /* We don't reschedule replenish work here -- we will
1154 * call the restock method and if it still needs
1155 * more buffers it will schedule replenish */
1156 break;
1157 }
1158
1159 spin_lock_irqsave(&rxq->lock, flags);
1160 if (list_empty(&rxq->rx_used)) {
1161 spin_unlock_irqrestore(&rxq->lock, flags);
1162 __free_pages(page, priv->hw_params.rx_page_order);
1163 return;
1164 }
1165 element = rxq->rx_used.next;
1166 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1167 list_del(element);
1168 spin_unlock_irqrestore(&rxq->lock, flags);
1169
1170 rxb->page = page;
1171 /* Get physical address of RB/SKB */
1172 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1173 PAGE_SIZE << priv->hw_params.rx_page_order,
1174 PCI_DMA_FROMDEVICE);
1175
1176 spin_lock_irqsave(&rxq->lock, flags);
1177
1178 list_add_tail(&rxb->list, &rxq->rx_free);
1179 rxq->free_count++;
1180 priv->alloc_rxb_page++;
1181
1182 spin_unlock_irqrestore(&rxq->lock, flags);
1183 }
1184 }
1185
1186 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1187 {
1188 unsigned long flags;
1189 int i;
1190 spin_lock_irqsave(&rxq->lock, flags);
1191 INIT_LIST_HEAD(&rxq->rx_free);
1192 INIT_LIST_HEAD(&rxq->rx_used);
1193 /* Fill the rx_used queue with _all_ of the Rx buffers */
1194 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1195 /* In the reset function, these buffers may have been allocated
1196 * to an SKB, so we need to unmap and free potential storage */
1197 if (rxq->pool[i].page != NULL) {
1198 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1199 PAGE_SIZE << priv->hw_params.rx_page_order,
1200 PCI_DMA_FROMDEVICE);
1201 __iwl_free_pages(priv, rxq->pool[i].page);
1202 rxq->pool[i].page = NULL;
1203 }
1204 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1205 }
1206
1207 /* Set us so that we have processed and used all buffers, but have
1208 * not restocked the Rx queue with fresh buffers */
1209 rxq->read = rxq->write = 0;
1210 rxq->write_actual = 0;
1211 rxq->free_count = 0;
1212 spin_unlock_irqrestore(&rxq->lock, flags);
1213 }
1214
1215 void iwl3945_rx_replenish(void *data)
1216 {
1217 struct iwl_priv *priv = data;
1218 unsigned long flags;
1219
1220 iwl3945_rx_allocate(priv, GFP_KERNEL);
1221
1222 spin_lock_irqsave(&priv->lock, flags);
1223 iwl3945_rx_queue_restock(priv);
1224 spin_unlock_irqrestore(&priv->lock, flags);
1225 }
1226
1227 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1228 {
1229 iwl3945_rx_allocate(priv, GFP_ATOMIC);
1230
1231 iwl3945_rx_queue_restock(priv);
1232 }
1233
1234
1235 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1236 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1237 * This free routine walks the list of POOL entries and if SKB is set to
1238 * non NULL it is unmapped and freed
1239 */
1240 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1241 {
1242 int i;
1243 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1244 if (rxq->pool[i].page != NULL) {
1245 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1246 PAGE_SIZE << priv->hw_params.rx_page_order,
1247 PCI_DMA_FROMDEVICE);
1248 __iwl_free_pages(priv, rxq->pool[i].page);
1249 rxq->pool[i].page = NULL;
1250 }
1251 }
1252
1253 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1254 rxq->dma_addr);
1255 pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1256 rxq->rb_stts, rxq->rb_stts_dma);
1257 rxq->bd = NULL;
1258 rxq->rb_stts = NULL;
1259 }
1260
1261
1262 /* Convert linear signal-to-noise ratio into dB */
1263 static u8 ratio2dB[100] = {
1264 /* 0 1 2 3 4 5 6 7 8 9 */
1265 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1266 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1267 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1268 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1269 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1270 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1271 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1272 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1273 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1274 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1275 };
1276
1277 /* Calculates a relative dB value from a ratio of linear
1278 * (i.e. not dB) signal levels.
1279 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1280 int iwl3945_calc_db_from_ratio(int sig_ratio)
1281 {
1282 /* 1000:1 or higher just report as 60 dB */
1283 if (sig_ratio >= 1000)
1284 return 60;
1285
1286 /* 100:1 or higher, divide by 10 and use table,
1287 * add 20 dB to make up for divide by 10 */
1288 if (sig_ratio >= 100)
1289 return 20 + (int)ratio2dB[sig_ratio/10];
1290
1291 /* We shouldn't see this */
1292 if (sig_ratio < 1)
1293 return 0;
1294
1295 /* Use table for ratios 1:1 - 99:1 */
1296 return (int)ratio2dB[sig_ratio];
1297 }
1298
1299 #define PERFECT_RSSI (-20) /* dBm */
1300 #define WORST_RSSI (-95) /* dBm */
1301 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1302
1303 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1304 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1305 * about formulas used below. */
1306 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1307 {
1308 int sig_qual;
1309 int degradation = PERFECT_RSSI - rssi_dbm;
1310
1311 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1312 * as indicator; formula is (signal dbm - noise dbm).
1313 * SNR at or above 40 is a great signal (100%).
1314 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1315 * Weakest usable signal is usually 10 - 15 dB SNR. */
1316 if (noise_dbm) {
1317 if (rssi_dbm - noise_dbm >= 40)
1318 return 100;
1319 else if (rssi_dbm < noise_dbm)
1320 return 0;
1321 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1322
1323 /* Else use just the signal level.
1324 * This formula is a least squares fit of data points collected and
1325 * compared with a reference system that had a percentage (%) display
1326 * for signal quality. */
1327 } else
1328 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1329 (15 * RSSI_RANGE + 62 * degradation)) /
1330 (RSSI_RANGE * RSSI_RANGE);
1331
1332 if (sig_qual > 100)
1333 sig_qual = 100;
1334 else if (sig_qual < 1)
1335 sig_qual = 0;
1336
1337 return sig_qual;
1338 }
1339
1340 /**
1341 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1342 *
1343 * Uses the priv->rx_handlers callback function array to invoke
1344 * the appropriate handlers, including command responses,
1345 * frame-received notifications, and other notifications.
1346 */
1347 static void iwl3945_rx_handle(struct iwl_priv *priv)
1348 {
1349 struct iwl_rx_mem_buffer *rxb;
1350 struct iwl_rx_packet *pkt;
1351 struct iwl_rx_queue *rxq = &priv->rxq;
1352 u32 r, i;
1353 int reclaim;
1354 unsigned long flags;
1355 u8 fill_rx = 0;
1356 u32 count = 8;
1357 int total_empty = 0;
1358
1359 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1360 * buffer that the driver may process (last buffer filled by ucode). */
1361 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1362 i = rxq->read;
1363
1364 /* calculate total frames need to be restock after handling RX */
1365 total_empty = r - rxq->write_actual;
1366 if (total_empty < 0)
1367 total_empty += RX_QUEUE_SIZE;
1368
1369 if (total_empty > (RX_QUEUE_SIZE / 2))
1370 fill_rx = 1;
1371 /* Rx interrupt, but nothing sent from uCode */
1372 if (i == r)
1373 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1374
1375 while (i != r) {
1376 rxb = rxq->queue[i];
1377
1378 /* If an RXB doesn't have a Rx queue slot associated with it,
1379 * then a bug has been introduced in the queue refilling
1380 * routines -- catch it here */
1381 BUG_ON(rxb == NULL);
1382
1383 rxq->queue[i] = NULL;
1384
1385 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1386 PAGE_SIZE << priv->hw_params.rx_page_order,
1387 PCI_DMA_FROMDEVICE);
1388 pkt = rxb_addr(rxb);
1389
1390 trace_iwlwifi_dev_rx(priv, pkt,
1391 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1392
1393 /* Reclaim a command buffer only if this packet is a response
1394 * to a (driver-originated) command.
1395 * If the packet (e.g. Rx frame) originated from uCode,
1396 * there is no command buffer to reclaim.
1397 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1398 * but apparently a few don't get set; catch them here. */
1399 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1400 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1401 (pkt->hdr.cmd != REPLY_TX);
1402
1403 /* Based on type of command response or notification,
1404 * handle those that need handling via function in
1405 * rx_handlers table. See iwl3945_setup_rx_handlers() */
1406 if (priv->rx_handlers[pkt->hdr.cmd]) {
1407 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1408 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1409 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1410 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1411 } else {
1412 /* No handling needed */
1413 IWL_DEBUG_RX(priv,
1414 "r %d i %d No handler needed for %s, 0x%02x\n",
1415 r, i, get_cmd_string(pkt->hdr.cmd),
1416 pkt->hdr.cmd);
1417 }
1418
1419 /*
1420 * XXX: After here, we should always check rxb->page
1421 * against NULL before touching it or its virtual
1422 * memory (pkt). Because some rx_handler might have
1423 * already taken or freed the pages.
1424 */
1425
1426 if (reclaim) {
1427 /* Invoke any callbacks, transfer the buffer to caller,
1428 * and fire off the (possibly) blocking iwl_send_cmd()
1429 * as we reclaim the driver command queue */
1430 if (rxb->page)
1431 iwl_tx_cmd_complete(priv, rxb);
1432 else
1433 IWL_WARN(priv, "Claim null rxb?\n");
1434 }
1435
1436 /* Reuse the page if possible. For notification packets and
1437 * SKBs that fail to Rx correctly, add them back into the
1438 * rx_free list for reuse later. */
1439 spin_lock_irqsave(&rxq->lock, flags);
1440 if (rxb->page != NULL) {
1441 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1442 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1443 PCI_DMA_FROMDEVICE);
1444 list_add_tail(&rxb->list, &rxq->rx_free);
1445 rxq->free_count++;
1446 } else
1447 list_add_tail(&rxb->list, &rxq->rx_used);
1448
1449 spin_unlock_irqrestore(&rxq->lock, flags);
1450
1451 i = (i + 1) & RX_QUEUE_MASK;
1452 /* If there are a lot of unused frames,
1453 * restock the Rx queue so ucode won't assert. */
1454 if (fill_rx) {
1455 count++;
1456 if (count >= 8) {
1457 rxq->read = i;
1458 iwl3945_rx_replenish_now(priv);
1459 count = 0;
1460 }
1461 }
1462 }
1463
1464 /* Backtrack one entry */
1465 rxq->read = i;
1466 if (fill_rx)
1467 iwl3945_rx_replenish_now(priv);
1468 else
1469 iwl3945_rx_queue_restock(priv);
1470 }
1471
1472 /* call this function to flush any scheduled tasklet */
1473 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1474 {
1475 /* wait to make sure we flush pending tasklet*/
1476 synchronize_irq(priv->pci_dev->irq);
1477 tasklet_kill(&priv->irq_tasklet);
1478 }
1479
1480 static const char *desc_lookup(int i)
1481 {
1482 switch (i) {
1483 case 1:
1484 return "FAIL";
1485 case 2:
1486 return "BAD_PARAM";
1487 case 3:
1488 return "BAD_CHECKSUM";
1489 case 4:
1490 return "NMI_INTERRUPT";
1491 case 5:
1492 return "SYSASSERT";
1493 case 6:
1494 return "FATAL_ERROR";
1495 }
1496
1497 return "UNKNOWN";
1498 }
1499
1500 #define ERROR_START_OFFSET (1 * sizeof(u32))
1501 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1502
1503 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1504 {
1505 u32 i;
1506 u32 desc, time, count, base, data1;
1507 u32 blink1, blink2, ilink1, ilink2;
1508
1509 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1510
1511 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1512 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1513 return;
1514 }
1515
1516
1517 count = iwl_read_targ_mem(priv, base);
1518
1519 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1520 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1521 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1522 priv->status, count);
1523 }
1524
1525 IWL_ERR(priv, "Desc Time asrtPC blink2 "
1526 "ilink1 nmiPC Line\n");
1527 for (i = ERROR_START_OFFSET;
1528 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1529 i += ERROR_ELEM_SIZE) {
1530 desc = iwl_read_targ_mem(priv, base + i);
1531 time =
1532 iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1533 blink1 =
1534 iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1535 blink2 =
1536 iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1537 ilink1 =
1538 iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1539 ilink2 =
1540 iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1541 data1 =
1542 iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1543
1544 IWL_ERR(priv,
1545 "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1546 desc_lookup(desc), desc, time, blink1, blink2,
1547 ilink1, ilink2, data1);
1548 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1549 0, blink1, blink2, ilink1, ilink2);
1550 }
1551 }
1552
1553 #define EVENT_START_OFFSET (6 * sizeof(u32))
1554
1555 /**
1556 * iwl3945_print_event_log - Dump error event log to syslog
1557 *
1558 */
1559 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1560 u32 num_events, u32 mode)
1561 {
1562 u32 i;
1563 u32 base; /* SRAM byte address of event log header */
1564 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1565 u32 ptr; /* SRAM byte address of log data */
1566 u32 ev, time, data; /* event log data */
1567 unsigned long reg_flags;
1568
1569 if (num_events == 0)
1570 return;
1571
1572 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1573
1574 if (mode == 0)
1575 event_size = 2 * sizeof(u32);
1576 else
1577 event_size = 3 * sizeof(u32);
1578
1579 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1580
1581 /* Make sure device is powered up for SRAM reads */
1582 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1583 iwl_grab_nic_access(priv);
1584
1585 /* Set starting address; reads will auto-increment */
1586 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1587 rmb();
1588
1589 /* "time" is actually "data" for mode 0 (no timestamp).
1590 * place event id # at far right for easier visual parsing. */
1591 for (i = 0; i < num_events; i++) {
1592 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1593 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1594 if (mode == 0) {
1595 /* data, ev */
1596 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1597 trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1598 } else {
1599 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1600 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1601 trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1602 }
1603 }
1604
1605 /* Allow device to power down */
1606 iwl_release_nic_access(priv);
1607 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1608 }
1609
1610 /**
1611 * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1612 */
1613 static void iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1614 u32 num_wraps, u32 next_entry,
1615 u32 size, u32 mode)
1616 {
1617 /*
1618 * display the newest DEFAULT_LOG_ENTRIES entries
1619 * i.e the entries just before the next ont that uCode would fill.
1620 */
1621 if (num_wraps) {
1622 if (next_entry < size) {
1623 iwl3945_print_event_log(priv,
1624 capacity - (size - next_entry),
1625 size - next_entry, mode);
1626 iwl3945_print_event_log(priv, 0,
1627 next_entry, mode);
1628 } else
1629 iwl3945_print_event_log(priv, next_entry - size,
1630 size, mode);
1631 } else {
1632 if (next_entry < size)
1633 iwl3945_print_event_log(priv, 0, next_entry, mode);
1634 else
1635 iwl3945_print_event_log(priv, next_entry - size,
1636 size, mode);
1637 }
1638 }
1639
1640 /* For sanity check only. Actual size is determined by uCode, typ. 512 */
1641 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1642
1643 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1644
1645 void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1646 {
1647 u32 base; /* SRAM byte address of event log header */
1648 u32 capacity; /* event log capacity in # entries */
1649 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1650 u32 num_wraps; /* # times uCode wrapped to top of log */
1651 u32 next_entry; /* index of next entry to be written by uCode */
1652 u32 size; /* # entries that we'll print */
1653
1654 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1655 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1656 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1657 return;
1658 }
1659
1660 /* event log header */
1661 capacity = iwl_read_targ_mem(priv, base);
1662 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1663 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1664 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1665
1666 if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1667 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1668 capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1669 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1670 }
1671
1672 if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1673 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1674 next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1675 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1676 }
1677
1678 size = num_wraps ? capacity : next_entry;
1679
1680 /* bail out if nothing in log */
1681 if (size == 0) {
1682 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1683 return;
1684 }
1685
1686 #ifdef CONFIG_IWLWIFI_DEBUG
1687 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1688 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1689 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1690 #else
1691 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1692 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1693 #endif
1694
1695 IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1696 size);
1697
1698 #ifdef CONFIG_IWLWIFI_DEBUG
1699 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1700 /* if uCode has wrapped back to top of log,
1701 * start at the oldest entry,
1702 * i.e the next one that uCode would fill.
1703 */
1704 if (num_wraps)
1705 iwl3945_print_event_log(priv, next_entry,
1706 capacity - next_entry, mode);
1707
1708 /* (then/else) start at top of log */
1709 iwl3945_print_event_log(priv, 0, next_entry, mode);
1710 } else
1711 iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1712 next_entry, size, mode);
1713 #else
1714 iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1715 next_entry, size, mode);
1716 #endif
1717
1718 }
1719
1720 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1721 {
1722 u32 inta, handled = 0;
1723 u32 inta_fh;
1724 unsigned long flags;
1725 #ifdef CONFIG_IWLWIFI_DEBUG
1726 u32 inta_mask;
1727 #endif
1728
1729 spin_lock_irqsave(&priv->lock, flags);
1730
1731 /* Ack/clear/reset pending uCode interrupts.
1732 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1733 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1734 inta = iwl_read32(priv, CSR_INT);
1735 iwl_write32(priv, CSR_INT, inta);
1736
1737 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1738 * Any new interrupts that happen after this, either while we're
1739 * in this tasklet, or later, will show up in next ISR/tasklet. */
1740 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1741 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1742
1743 #ifdef CONFIG_IWLWIFI_DEBUG
1744 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1745 /* just for debug */
1746 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1747 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1748 inta, inta_mask, inta_fh);
1749 }
1750 #endif
1751
1752 spin_unlock_irqrestore(&priv->lock, flags);
1753
1754 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1755 * atomic, make sure that inta covers all the interrupts that
1756 * we've discovered, even if FH interrupt came in just after
1757 * reading CSR_INT. */
1758 if (inta_fh & CSR39_FH_INT_RX_MASK)
1759 inta |= CSR_INT_BIT_FH_RX;
1760 if (inta_fh & CSR39_FH_INT_TX_MASK)
1761 inta |= CSR_INT_BIT_FH_TX;
1762
1763 /* Now service all interrupt bits discovered above. */
1764 if (inta & CSR_INT_BIT_HW_ERR) {
1765 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1766
1767 /* Tell the device to stop sending interrupts */
1768 iwl_disable_interrupts(priv);
1769
1770 priv->isr_stats.hw++;
1771 iwl_irq_handle_error(priv);
1772
1773 handled |= CSR_INT_BIT_HW_ERR;
1774
1775 return;
1776 }
1777
1778 #ifdef CONFIG_IWLWIFI_DEBUG
1779 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1780 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1781 if (inta & CSR_INT_BIT_SCD) {
1782 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1783 "the frame/frames.\n");
1784 priv->isr_stats.sch++;
1785 }
1786
1787 /* Alive notification via Rx interrupt will do the real work */
1788 if (inta & CSR_INT_BIT_ALIVE) {
1789 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1790 priv->isr_stats.alive++;
1791 }
1792 }
1793 #endif
1794 /* Safely ignore these bits for debug checks below */
1795 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1796
1797 /* Error detected by uCode */
1798 if (inta & CSR_INT_BIT_SW_ERR) {
1799 IWL_ERR(priv, "Microcode SW error detected. "
1800 "Restarting 0x%X.\n", inta);
1801 priv->isr_stats.sw++;
1802 priv->isr_stats.sw_err = inta;
1803 iwl_irq_handle_error(priv);
1804 handled |= CSR_INT_BIT_SW_ERR;
1805 }
1806
1807 /* uCode wakes up after power-down sleep */
1808 if (inta & CSR_INT_BIT_WAKEUP) {
1809 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1810 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1811 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1812 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1813 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1814 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1815 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1816 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1817
1818 priv->isr_stats.wakeup++;
1819 handled |= CSR_INT_BIT_WAKEUP;
1820 }
1821
1822 /* All uCode command responses, including Tx command responses,
1823 * Rx "responses" (frame-received notification), and other
1824 * notifications from uCode come through here*/
1825 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1826 iwl3945_rx_handle(priv);
1827 priv->isr_stats.rx++;
1828 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1829 }
1830
1831 if (inta & CSR_INT_BIT_FH_TX) {
1832 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1833 priv->isr_stats.tx++;
1834
1835 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1836 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1837 (FH39_SRVC_CHNL), 0x0);
1838 handled |= CSR_INT_BIT_FH_TX;
1839 }
1840
1841 if (inta & ~handled) {
1842 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1843 priv->isr_stats.unhandled++;
1844 }
1845
1846 if (inta & ~priv->inta_mask) {
1847 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1848 inta & ~priv->inta_mask);
1849 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1850 }
1851
1852 /* Re-enable all interrupts */
1853 /* only Re-enable if disabled by irq */
1854 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1855 iwl_enable_interrupts(priv);
1856
1857 #ifdef CONFIG_IWLWIFI_DEBUG
1858 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1859 inta = iwl_read32(priv, CSR_INT);
1860 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1861 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1862 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1863 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1864 }
1865 #endif
1866 }
1867
1868 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1869 enum ieee80211_band band,
1870 u8 is_active, u8 n_probes,
1871 struct iwl3945_scan_channel *scan_ch)
1872 {
1873 struct ieee80211_channel *chan;
1874 const struct ieee80211_supported_band *sband;
1875 const struct iwl_channel_info *ch_info;
1876 u16 passive_dwell = 0;
1877 u16 active_dwell = 0;
1878 int added, i;
1879
1880 sband = iwl_get_hw_mode(priv, band);
1881 if (!sband)
1882 return 0;
1883
1884 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1885 passive_dwell = iwl_get_passive_dwell_time(priv, band);
1886
1887 if (passive_dwell <= active_dwell)
1888 passive_dwell = active_dwell + 1;
1889
1890 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1891 chan = priv->scan_request->channels[i];
1892
1893 if (chan->band != band)
1894 continue;
1895
1896 scan_ch->channel = chan->hw_value;
1897
1898 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1899 if (!is_channel_valid(ch_info)) {
1900 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1901 scan_ch->channel);
1902 continue;
1903 }
1904
1905 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1906 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1907 /* If passive , set up for auto-switch
1908 * and use long active_dwell time.
1909 */
1910 if (!is_active || is_channel_passive(ch_info) ||
1911 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1912 scan_ch->type = 0; /* passive */
1913 if (IWL_UCODE_API(priv->ucode_ver) == 1)
1914 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1915 } else {
1916 scan_ch->type = 1; /* active */
1917 }
1918
1919 /* Set direct probe bits. These may be used both for active
1920 * scan channels (probes gets sent right away),
1921 * or for passive channels (probes get se sent only after
1922 * hearing clear Rx packet).*/
1923 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1924 if (n_probes)
1925 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1926 } else {
1927 /* uCode v1 does not allow setting direct probe bits on
1928 * passive channel. */
1929 if ((scan_ch->type & 1) && n_probes)
1930 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1931 }
1932
1933 /* Set txpower levels to defaults */
1934 scan_ch->tpc.dsp_atten = 110;
1935 /* scan_pwr_info->tpc.dsp_atten; */
1936
1937 /*scan_pwr_info->tpc.tx_gain; */
1938 if (band == IEEE80211_BAND_5GHZ)
1939 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1940 else {
1941 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1942 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1943 * power level:
1944 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1945 */
1946 }
1947
1948 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1949 scan_ch->channel,
1950 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1951 (scan_ch->type & 1) ?
1952 active_dwell : passive_dwell);
1953
1954 scan_ch++;
1955 added++;
1956 }
1957
1958 IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1959 return added;
1960 }
1961
1962 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1963 struct ieee80211_rate *rates)
1964 {
1965 int i;
1966
1967 for (i = 0; i < IWL_RATE_COUNT; i++) {
1968 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1969 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1970 rates[i].hw_value_short = i;
1971 rates[i].flags = 0;
1972 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1973 /*
1974 * If CCK != 1M then set short preamble rate flag.
1975 */
1976 rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1977 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1978 }
1979 }
1980 }
1981
1982 /******************************************************************************
1983 *
1984 * uCode download functions
1985 *
1986 ******************************************************************************/
1987
1988 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1989 {
1990 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1991 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1992 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1993 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1994 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1995 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1996 }
1997
1998 /**
1999 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2000 * looking at all data.
2001 */
2002 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2003 {
2004 u32 val;
2005 u32 save_len = len;
2006 int rc = 0;
2007 u32 errcnt;
2008
2009 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2010
2011 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2012 IWL39_RTC_INST_LOWER_BOUND);
2013
2014 errcnt = 0;
2015 for (; len > 0; len -= sizeof(u32), image++) {
2016 /* read data comes through single port, auto-incr addr */
2017 /* NOTE: Use the debugless read so we don't flood kernel log
2018 * if IWL_DL_IO is set */
2019 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2020 if (val != le32_to_cpu(*image)) {
2021 IWL_ERR(priv, "uCode INST section is invalid at "
2022 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2023 save_len - len, val, le32_to_cpu(*image));
2024 rc = -EIO;
2025 errcnt++;
2026 if (errcnt >= 20)
2027 break;
2028 }
2029 }
2030
2031
2032 if (!errcnt)
2033 IWL_DEBUG_INFO(priv,
2034 "ucode image in INSTRUCTION memory is good\n");
2035
2036 return rc;
2037 }
2038
2039
2040 /**
2041 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2042 * using sample data 100 bytes apart. If these sample points are good,
2043 * it's a pretty good bet that everything between them is good, too.
2044 */
2045 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2046 {
2047 u32 val;
2048 int rc = 0;
2049 u32 errcnt = 0;
2050 u32 i;
2051
2052 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2053
2054 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2055 /* read data comes through single port, auto-incr addr */
2056 /* NOTE: Use the debugless read so we don't flood kernel log
2057 * if IWL_DL_IO is set */
2058 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2059 i + IWL39_RTC_INST_LOWER_BOUND);
2060 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2061 if (val != le32_to_cpu(*image)) {
2062 #if 0 /* Enable this if you want to see details */
2063 IWL_ERR(priv, "uCode INST section is invalid at "
2064 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2065 i, val, *image);
2066 #endif
2067 rc = -EIO;
2068 errcnt++;
2069 if (errcnt >= 3)
2070 break;
2071 }
2072 }
2073
2074 return rc;
2075 }
2076
2077
2078 /**
2079 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2080 * and verify its contents
2081 */
2082 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2083 {
2084 __le32 *image;
2085 u32 len;
2086 int rc = 0;
2087
2088 /* Try bootstrap */
2089 image = (__le32 *)priv->ucode_boot.v_addr;
2090 len = priv->ucode_boot.len;
2091 rc = iwl3945_verify_inst_sparse(priv, image, len);
2092 if (rc == 0) {
2093 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2094 return 0;
2095 }
2096
2097 /* Try initialize */
2098 image = (__le32 *)priv->ucode_init.v_addr;
2099 len = priv->ucode_init.len;
2100 rc = iwl3945_verify_inst_sparse(priv, image, len);
2101 if (rc == 0) {
2102 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2103 return 0;
2104 }
2105
2106 /* Try runtime/protocol */
2107 image = (__le32 *)priv->ucode_code.v_addr;
2108 len = priv->ucode_code.len;
2109 rc = iwl3945_verify_inst_sparse(priv, image, len);
2110 if (rc == 0) {
2111 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2112 return 0;
2113 }
2114
2115 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2116
2117 /* Since nothing seems to match, show first several data entries in
2118 * instruction SRAM, so maybe visual inspection will give a clue.
2119 * Selection of bootstrap image (vs. other images) is arbitrary. */
2120 image = (__le32 *)priv->ucode_boot.v_addr;
2121 len = priv->ucode_boot.len;
2122 rc = iwl3945_verify_inst_full(priv, image, len);
2123
2124 return rc;
2125 }
2126
2127 static void iwl3945_nic_start(struct iwl_priv *priv)
2128 {
2129 /* Remove all resets to allow NIC to operate */
2130 iwl_write32(priv, CSR_RESET, 0);
2131 }
2132
2133 /**
2134 * iwl3945_read_ucode - Read uCode images from disk file.
2135 *
2136 * Copy into buffers for card to fetch via bus-mastering
2137 */
2138 static int iwl3945_read_ucode(struct iwl_priv *priv)
2139 {
2140 const struct iwl_ucode_header *ucode;
2141 int ret = -EINVAL, index;
2142 const struct firmware *ucode_raw;
2143 /* firmware file name contains uCode/driver compatibility version */
2144 const char *name_pre = priv->cfg->fw_name_pre;
2145 const unsigned int api_max = priv->cfg->ucode_api_max;
2146 const unsigned int api_min = priv->cfg->ucode_api_min;
2147 char buf[25];
2148 u8 *src;
2149 size_t len;
2150 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2151
2152 /* Ask kernel firmware_class module to get the boot firmware off disk.
2153 * request_firmware() is synchronous, file is in memory on return. */
2154 for (index = api_max; index >= api_min; index--) {
2155 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2156 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2157 if (ret < 0) {
2158 IWL_ERR(priv, "%s firmware file req failed: %d\n",
2159 buf, ret);
2160 if (ret == -ENOENT)
2161 continue;
2162 else
2163 goto error;
2164 } else {
2165 if (index < api_max)
2166 IWL_ERR(priv, "Loaded firmware %s, "
2167 "which is deprecated. "
2168 " Please use API v%u instead.\n",
2169 buf, api_max);
2170 IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2171 "(%zd bytes) from disk\n",
2172 buf, ucode_raw->size);
2173 break;
2174 }
2175 }
2176
2177 if (ret < 0)
2178 goto error;
2179
2180 /* Make sure that we got at least our header! */
2181 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
2182 IWL_ERR(priv, "File size way too small!\n");
2183 ret = -EINVAL;
2184 goto err_release;
2185 }
2186
2187 /* Data from ucode file: header followed by uCode images */
2188 ucode = (struct iwl_ucode_header *)ucode_raw->data;
2189
2190 priv->ucode_ver = le32_to_cpu(ucode->ver);
2191 api_ver = IWL_UCODE_API(priv->ucode_ver);
2192 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2193 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2194 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2195 init_data_size =
2196 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2197 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2198 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2199
2200 /* api_ver should match the api version forming part of the
2201 * firmware filename ... but we don't check for that and only rely
2202 * on the API version read from firmware header from here on forward */
2203
2204 if (api_ver < api_min || api_ver > api_max) {
2205 IWL_ERR(priv, "Driver unable to support your firmware API. "
2206 "Driver supports v%u, firmware is v%u.\n",
2207 api_max, api_ver);
2208 priv->ucode_ver = 0;
2209 ret = -EINVAL;
2210 goto err_release;
2211 }
2212 if (api_ver != api_max)
2213 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2214 "got %u. New firmware can be obtained "
2215 "from http://www.intellinuxwireless.org.\n",
2216 api_max, api_ver);
2217
2218 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2219 IWL_UCODE_MAJOR(priv->ucode_ver),
2220 IWL_UCODE_MINOR(priv->ucode_ver),
2221 IWL_UCODE_API(priv->ucode_ver),
2222 IWL_UCODE_SERIAL(priv->ucode_ver));
2223
2224 snprintf(priv->hw->wiphy->fw_version,
2225 sizeof(priv->hw->wiphy->fw_version),
2226 "%u.%u.%u.%u",
2227 IWL_UCODE_MAJOR(priv->ucode_ver),
2228 IWL_UCODE_MINOR(priv->ucode_ver),
2229 IWL_UCODE_API(priv->ucode_ver),
2230 IWL_UCODE_SERIAL(priv->ucode_ver));
2231
2232 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2233 priv->ucode_ver);
2234 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2235 inst_size);
2236 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2237 data_size);
2238 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2239 init_size);
2240 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2241 init_data_size);
2242 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2243 boot_size);
2244
2245
2246 /* Verify size of file vs. image size info in file's header */
2247 if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2248 inst_size + data_size + init_size +
2249 init_data_size + boot_size) {
2250
2251 IWL_DEBUG_INFO(priv,
2252 "uCode file size %zd does not match expected size\n",
2253 ucode_raw->size);
2254 ret = -EINVAL;
2255 goto err_release;
2256 }
2257
2258 /* Verify that uCode images will fit in card's SRAM */
2259 if (inst_size > IWL39_MAX_INST_SIZE) {
2260 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2261 inst_size);
2262 ret = -EINVAL;
2263 goto err_release;
2264 }
2265
2266 if (data_size > IWL39_MAX_DATA_SIZE) {
2267 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2268 data_size);
2269 ret = -EINVAL;
2270 goto err_release;
2271 }
2272 if (init_size > IWL39_MAX_INST_SIZE) {
2273 IWL_DEBUG_INFO(priv,
2274 "uCode init instr len %d too large to fit in\n",
2275 init_size);
2276 ret = -EINVAL;
2277 goto err_release;
2278 }
2279 if (init_data_size > IWL39_MAX_DATA_SIZE) {
2280 IWL_DEBUG_INFO(priv,
2281 "uCode init data len %d too large to fit in\n",
2282 init_data_size);
2283 ret = -EINVAL;
2284 goto err_release;
2285 }
2286 if (boot_size > IWL39_MAX_BSM_SIZE) {
2287 IWL_DEBUG_INFO(priv,
2288 "uCode boot instr len %d too large to fit in\n",
2289 boot_size);
2290 ret = -EINVAL;
2291 goto err_release;
2292 }
2293
2294 /* Allocate ucode buffers for card's bus-master loading ... */
2295
2296 /* Runtime instructions and 2 copies of data:
2297 * 1) unmodified from disk
2298 * 2) backup cache for save/restore during power-downs */
2299 priv->ucode_code.len = inst_size;
2300 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2301
2302 priv->ucode_data.len = data_size;
2303 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2304
2305 priv->ucode_data_backup.len = data_size;
2306 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2307
2308 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2309 !priv->ucode_data_backup.v_addr)
2310 goto err_pci_alloc;
2311
2312 /* Initialization instructions and data */
2313 if (init_size && init_data_size) {
2314 priv->ucode_init.len = init_size;
2315 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2316
2317 priv->ucode_init_data.len = init_data_size;
2318 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2319
2320 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2321 goto err_pci_alloc;
2322 }
2323
2324 /* Bootstrap (instructions only, no data) */
2325 if (boot_size) {
2326 priv->ucode_boot.len = boot_size;
2327 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2328
2329 if (!priv->ucode_boot.v_addr)
2330 goto err_pci_alloc;
2331 }
2332
2333 /* Copy images into buffers for card's bus-master reads ... */
2334
2335 /* Runtime instructions (first block of data in file) */
2336 len = inst_size;
2337 IWL_DEBUG_INFO(priv,
2338 "Copying (but not loading) uCode instr len %zd\n", len);
2339 memcpy(priv->ucode_code.v_addr, src, len);
2340 src += len;
2341
2342 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2343 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2344
2345 /* Runtime data (2nd block)
2346 * NOTE: Copy into backup buffer will be done in iwl3945_up() */
2347 len = data_size;
2348 IWL_DEBUG_INFO(priv,
2349 "Copying (but not loading) uCode data len %zd\n", len);
2350 memcpy(priv->ucode_data.v_addr, src, len);
2351 memcpy(priv->ucode_data_backup.v_addr, src, len);
2352 src += len;
2353
2354 /* Initialization instructions (3rd block) */
2355 if (init_size) {
2356 len = init_size;
2357 IWL_DEBUG_INFO(priv,
2358 "Copying (but not loading) init instr len %zd\n", len);
2359 memcpy(priv->ucode_init.v_addr, src, len);
2360 src += len;
2361 }
2362
2363 /* Initialization data (4th block) */
2364 if (init_data_size) {
2365 len = init_data_size;
2366 IWL_DEBUG_INFO(priv,
2367 "Copying (but not loading) init data len %zd\n", len);
2368 memcpy(priv->ucode_init_data.v_addr, src, len);
2369 src += len;
2370 }
2371
2372 /* Bootstrap instructions (5th block) */
2373 len = boot_size;
2374 IWL_DEBUG_INFO(priv,
2375 "Copying (but not loading) boot instr len %zd\n", len);
2376 memcpy(priv->ucode_boot.v_addr, src, len);
2377
2378 /* We have our copies now, allow OS release its copies */
2379 release_firmware(ucode_raw);
2380 return 0;
2381
2382 err_pci_alloc:
2383 IWL_ERR(priv, "failed to allocate pci memory\n");
2384 ret = -ENOMEM;
2385 iwl3945_dealloc_ucode_pci(priv);
2386
2387 err_release:
2388 release_firmware(ucode_raw);
2389
2390 error:
2391 return ret;
2392 }
2393
2394
2395 /**
2396 * iwl3945_set_ucode_ptrs - Set uCode address location
2397 *
2398 * Tell initialization uCode where to find runtime uCode.
2399 *
2400 * BSM registers initially contain pointers to initialization uCode.
2401 * We need to replace them to load runtime uCode inst and data,
2402 * and to save runtime data when powering down.
2403 */
2404 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2405 {
2406 dma_addr_t pinst;
2407 dma_addr_t pdata;
2408
2409 /* bits 31:0 for 3945 */
2410 pinst = priv->ucode_code.p_addr;
2411 pdata = priv->ucode_data_backup.p_addr;
2412
2413 /* Tell bootstrap uCode where to find image to load */
2414 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2415 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2416 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2417 priv->ucode_data.len);
2418
2419 /* Inst byte count must be last to set up, bit 31 signals uCode
2420 * that all new ptr/size info is in place */
2421 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2422 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2423
2424 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2425
2426 return 0;
2427 }
2428
2429 /**
2430 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2431 *
2432 * Called after REPLY_ALIVE notification received from "initialize" uCode.
2433 *
2434 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2435 */
2436 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2437 {
2438 /* Check alive response for "valid" sign from uCode */
2439 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2440 /* We had an error bringing up the hardware, so take it
2441 * all the way back down so we can try again */
2442 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2443 goto restart;
2444 }
2445
2446 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2447 * This is a paranoid check, because we would not have gotten the
2448 * "initialize" alive if code weren't properly loaded. */
2449 if (iwl3945_verify_ucode(priv)) {
2450 /* Runtime instruction load was bad;
2451 * take it all the way back down so we can try again */
2452 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2453 goto restart;
2454 }
2455
2456 /* Send pointers to protocol/runtime uCode image ... init code will
2457 * load and launch runtime uCode, which will send us another "Alive"
2458 * notification. */
2459 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2460 if (iwl3945_set_ucode_ptrs(priv)) {
2461 /* Runtime instruction load won't happen;
2462 * take it all the way back down so we can try again */
2463 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2464 goto restart;
2465 }
2466 return;
2467
2468 restart:
2469 queue_work(priv->workqueue, &priv->restart);
2470 }
2471
2472 /**
2473 * iwl3945_alive_start - called after REPLY_ALIVE notification received
2474 * from protocol/runtime uCode (initialization uCode's
2475 * Alive gets handled by iwl3945_init_alive_start()).
2476 */
2477 static void iwl3945_alive_start(struct iwl_priv *priv)
2478 {
2479 int thermal_spin = 0;
2480 u32 rfkill;
2481
2482 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2483
2484 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2485 /* We had an error bringing up the hardware, so take it
2486 * all the way back down so we can try again */
2487 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2488 goto restart;
2489 }
2490
2491 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2492 * This is a paranoid check, because we would not have gotten the
2493 * "runtime" alive if code weren't properly loaded. */
2494 if (iwl3945_verify_ucode(priv)) {
2495 /* Runtime instruction load was bad;
2496 * take it all the way back down so we can try again */
2497 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2498 goto restart;
2499 }
2500
2501 iwl_clear_stations_table(priv);
2502
2503 rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2504 IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2505
2506 if (rfkill & 0x1) {
2507 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2508 /* if RFKILL is not on, then wait for thermal
2509 * sensor in adapter to kick in */
2510 while (iwl3945_hw_get_temperature(priv) == 0) {
2511 thermal_spin++;
2512 udelay(10);
2513 }
2514
2515 if (thermal_spin)
2516 IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2517 thermal_spin * 10);
2518 } else
2519 set_bit(STATUS_RF_KILL_HW, &priv->status);
2520
2521 /* After the ALIVE response, we can send commands to 3945 uCode */
2522 set_bit(STATUS_ALIVE, &priv->status);
2523
2524 if (iwl_is_rfkill(priv))
2525 return;
2526
2527 ieee80211_wake_queues(priv->hw);
2528
2529 priv->active_rate = priv->rates_mask;
2530 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2531
2532 iwl_power_update_mode(priv, true);
2533
2534 if (iwl_is_associated(priv)) {
2535 struct iwl3945_rxon_cmd *active_rxon =
2536 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2537
2538 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2539 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2540 } else {
2541 /* Initialize our rx_config data */
2542 iwl_connection_init_rx_config(priv, priv->iw_mode);
2543 }
2544
2545 /* Configure Bluetooth device coexistence support */
2546 iwl_send_bt_config(priv);
2547
2548 /* Configure the adapter for unassociated operation */
2549 iwlcore_commit_rxon(priv);
2550
2551 iwl3945_reg_txpower_periodic(priv);
2552
2553 iwl_leds_init(priv);
2554
2555 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2556 set_bit(STATUS_READY, &priv->status);
2557 wake_up_interruptible(&priv->wait_command_queue);
2558
2559 /* reassociate for ADHOC mode */
2560 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2561 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2562 priv->vif);
2563 if (beacon)
2564 iwl_mac_beacon_update(priv->hw, beacon);
2565 }
2566
2567 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2568 iwl_set_mode(priv, priv->iw_mode);
2569
2570 return;
2571
2572 restart:
2573 queue_work(priv->workqueue, &priv->restart);
2574 }
2575
2576 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2577
2578 static void __iwl3945_down(struct iwl_priv *priv)
2579 {
2580 unsigned long flags;
2581 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2582 struct ieee80211_conf *conf = NULL;
2583
2584 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2585
2586 conf = ieee80211_get_hw_conf(priv->hw);
2587
2588 if (!exit_pending)
2589 set_bit(STATUS_EXIT_PENDING, &priv->status);
2590
2591 iwl_clear_stations_table(priv);
2592
2593 /* Unblock any waiting calls */
2594 wake_up_interruptible_all(&priv->wait_command_queue);
2595
2596 /* Wipe out the EXIT_PENDING status bit if we are not actually
2597 * exiting the module */
2598 if (!exit_pending)
2599 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2600
2601 /* stop and reset the on-board processor */
2602 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2603
2604 /* tell the device to stop sending interrupts */
2605 spin_lock_irqsave(&priv->lock, flags);
2606 iwl_disable_interrupts(priv);
2607 spin_unlock_irqrestore(&priv->lock, flags);
2608 iwl_synchronize_irq(priv);
2609
2610 if (priv->mac80211_registered)
2611 ieee80211_stop_queues(priv->hw);
2612
2613 /* If we have not previously called iwl3945_init() then
2614 * clear all bits but the RF Kill bits and return */
2615 if (!iwl_is_init(priv)) {
2616 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2617 STATUS_RF_KILL_HW |
2618 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2619 STATUS_GEO_CONFIGURED |
2620 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2621 STATUS_EXIT_PENDING;
2622 goto exit;
2623 }
2624
2625 /* ...otherwise clear out all the status bits but the RF Kill
2626 * bit and continue taking the NIC down. */
2627 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2628 STATUS_RF_KILL_HW |
2629 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2630 STATUS_GEO_CONFIGURED |
2631 test_bit(STATUS_FW_ERROR, &priv->status) <<
2632 STATUS_FW_ERROR |
2633 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2634 STATUS_EXIT_PENDING;
2635
2636 iwl3945_hw_txq_ctx_stop(priv);
2637 iwl3945_hw_rxq_stop(priv);
2638
2639 /* Power-down device's busmaster DMA clocks */
2640 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2641 udelay(5);
2642
2643 /* Stop the device, and put it in low power state */
2644 priv->cfg->ops->lib->apm_ops.stop(priv);
2645
2646 exit:
2647 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2648
2649 if (priv->ibss_beacon)
2650 dev_kfree_skb(priv->ibss_beacon);
2651 priv->ibss_beacon = NULL;
2652
2653 /* clear out any free frames */
2654 iwl3945_clear_free_frames(priv);
2655 }
2656
2657 static void iwl3945_down(struct iwl_priv *priv)
2658 {
2659 mutex_lock(&priv->mutex);
2660 __iwl3945_down(priv);
2661 mutex_unlock(&priv->mutex);
2662
2663 iwl3945_cancel_deferred_work(priv);
2664 }
2665
2666 #define MAX_HW_RESTARTS 5
2667
2668 static int __iwl3945_up(struct iwl_priv *priv)
2669 {
2670 int rc, i;
2671
2672 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2673 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2674 return -EIO;
2675 }
2676
2677 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2678 IWL_ERR(priv, "ucode not available for device bring up\n");
2679 return -EIO;
2680 }
2681
2682 /* If platform's RF_KILL switch is NOT set to KILL */
2683 if (iwl_read32(priv, CSR_GP_CNTRL) &
2684 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2685 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2686 else {
2687 set_bit(STATUS_RF_KILL_HW, &priv->status);
2688 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2689 return -ENODEV;
2690 }
2691
2692 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2693
2694 rc = iwl3945_hw_nic_init(priv);
2695 if (rc) {
2696 IWL_ERR(priv, "Unable to int nic\n");
2697 return rc;
2698 }
2699
2700 /* make sure rfkill handshake bits are cleared */
2701 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2702 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2703 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2704
2705 /* clear (again), then enable host interrupts */
2706 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2707 iwl_enable_interrupts(priv);
2708
2709 /* really make sure rfkill handshake bits are cleared */
2710 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2712
2713 /* Copy original ucode data image from disk into backup cache.
2714 * This will be used to initialize the on-board processor's
2715 * data SRAM for a clean start when the runtime program first loads. */
2716 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2717 priv->ucode_data.len);
2718
2719 /* We return success when we resume from suspend and rf_kill is on. */
2720 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2721 return 0;
2722
2723 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2724
2725 iwl_clear_stations_table(priv);
2726
2727 /* load bootstrap state machine,
2728 * load bootstrap program into processor's memory,
2729 * prepare to load the "initialize" uCode */
2730 priv->cfg->ops->lib->load_ucode(priv);
2731
2732 if (rc) {
2733 IWL_ERR(priv,
2734 "Unable to set up bootstrap uCode: %d\n", rc);
2735 continue;
2736 }
2737
2738 /* start card; "initialize" will load runtime ucode */
2739 iwl3945_nic_start(priv);
2740
2741 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2742
2743 return 0;
2744 }
2745
2746 set_bit(STATUS_EXIT_PENDING, &priv->status);
2747 __iwl3945_down(priv);
2748 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2749
2750 /* tried to restart and config the device for as long as our
2751 * patience could withstand */
2752 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2753 return -EIO;
2754 }
2755
2756
2757 /*****************************************************************************
2758 *
2759 * Workqueue callbacks
2760 *
2761 *****************************************************************************/
2762
2763 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2764 {
2765 struct iwl_priv *priv =
2766 container_of(data, struct iwl_priv, init_alive_start.work);
2767
2768 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2769 return;
2770
2771 mutex_lock(&priv->mutex);
2772 iwl3945_init_alive_start(priv);
2773 mutex_unlock(&priv->mutex);
2774 }
2775
2776 static void iwl3945_bg_alive_start(struct work_struct *data)
2777 {
2778 struct iwl_priv *priv =
2779 container_of(data, struct iwl_priv, alive_start.work);
2780
2781 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2782 return;
2783
2784 mutex_lock(&priv->mutex);
2785 iwl3945_alive_start(priv);
2786 mutex_unlock(&priv->mutex);
2787 }
2788
2789 /*
2790 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2791 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2792 * *is* readable even when device has been SW_RESET into low power mode
2793 * (e.g. during RF KILL).
2794 */
2795 static void iwl3945_rfkill_poll(struct work_struct *data)
2796 {
2797 struct iwl_priv *priv =
2798 container_of(data, struct iwl_priv, rfkill_poll.work);
2799 bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2800 bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2801 & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2802
2803 if (new_rfkill != old_rfkill) {
2804 if (new_rfkill)
2805 set_bit(STATUS_RF_KILL_HW, &priv->status);
2806 else
2807 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2808
2809 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2810
2811 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2812 new_rfkill ? "disable radio" : "enable radio");
2813 }
2814
2815 /* Keep this running, even if radio now enabled. This will be
2816 * cancelled in mac_start() if system decides to start again */
2817 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2818 round_jiffies_relative(2 * HZ));
2819
2820 }
2821
2822 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2823 static void iwl3945_bg_request_scan(struct work_struct *data)
2824 {
2825 struct iwl_priv *priv =
2826 container_of(data, struct iwl_priv, request_scan);
2827 struct iwl_host_cmd cmd = {
2828 .id = REPLY_SCAN_CMD,
2829 .len = sizeof(struct iwl3945_scan_cmd),
2830 .flags = CMD_SIZE_HUGE,
2831 };
2832 int rc = 0;
2833 struct iwl3945_scan_cmd *scan;
2834 struct ieee80211_conf *conf = NULL;
2835 u8 n_probes = 0;
2836 enum ieee80211_band band;
2837 bool is_active = false;
2838
2839 conf = ieee80211_get_hw_conf(priv->hw);
2840
2841 mutex_lock(&priv->mutex);
2842
2843 cancel_delayed_work(&priv->scan_check);
2844
2845 if (!iwl_is_ready(priv)) {
2846 IWL_WARN(priv, "request scan called when driver not ready.\n");
2847 goto done;
2848 }
2849
2850 /* Make sure the scan wasn't canceled before this queued work
2851 * was given the chance to run... */
2852 if (!test_bit(STATUS_SCANNING, &priv->status))
2853 goto done;
2854
2855 /* This should never be called or scheduled if there is currently
2856 * a scan active in the hardware. */
2857 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2858 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests "
2859 "Ignoring second request.\n");
2860 rc = -EIO;
2861 goto done;
2862 }
2863
2864 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2865 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2866 goto done;
2867 }
2868
2869 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2870 IWL_DEBUG_HC(priv,
2871 "Scan request while abort pending. Queuing.\n");
2872 goto done;
2873 }
2874
2875 if (iwl_is_rfkill(priv)) {
2876 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2877 goto done;
2878 }
2879
2880 if (!test_bit(STATUS_READY, &priv->status)) {
2881 IWL_DEBUG_HC(priv,
2882 "Scan request while uninitialized. Queuing.\n");
2883 goto done;
2884 }
2885
2886 if (!priv->scan_bands) {
2887 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2888 goto done;
2889 }
2890
2891 if (!priv->scan) {
2892 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2893 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2894 if (!priv->scan) {
2895 rc = -ENOMEM;
2896 goto done;
2897 }
2898 }
2899 scan = priv->scan;
2900 memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2901
2902 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2903 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2904
2905 if (iwl_is_associated(priv)) {
2906 u16 interval = 0;
2907 u32 extra;
2908 u32 suspend_time = 100;
2909 u32 scan_suspend_time = 100;
2910 unsigned long flags;
2911
2912 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2913
2914 spin_lock_irqsave(&priv->lock, flags);
2915 interval = priv->beacon_int;
2916 spin_unlock_irqrestore(&priv->lock, flags);
2917
2918 scan->suspend_time = 0;
2919 scan->max_out_time = cpu_to_le32(200 * 1024);
2920 if (!interval)
2921 interval = suspend_time;
2922 /*
2923 * suspend time format:
2924 * 0-19: beacon interval in usec (time before exec.)
2925 * 20-23: 0
2926 * 24-31: number of beacons (suspend between channels)
2927 */
2928
2929 extra = (suspend_time / interval) << 24;
2930 scan_suspend_time = 0xFF0FFFFF &
2931 (extra | ((suspend_time % interval) * 1024));
2932
2933 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2934 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2935 scan_suspend_time, interval);
2936 }
2937
2938 if (priv->scan_request->n_ssids) {
2939 int i, p = 0;
2940 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2941 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2942 /* always does wildcard anyway */
2943 if (!priv->scan_request->ssids[i].ssid_len)
2944 continue;
2945 scan->direct_scan[p].id = WLAN_EID_SSID;
2946 scan->direct_scan[p].len =
2947 priv->scan_request->ssids[i].ssid_len;
2948 memcpy(scan->direct_scan[p].ssid,
2949 priv->scan_request->ssids[i].ssid,
2950 priv->scan_request->ssids[i].ssid_len);
2951 n_probes++;
2952 p++;
2953 }
2954 is_active = true;
2955 } else
2956 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2957
2958 /* We don't build a direct scan probe request; the uCode will do
2959 * that based on the direct_mask added to each channel entry */
2960 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2961 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2962 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2963
2964 /* flags + rate selection */
2965
2966 if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2967 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2968 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2969 scan->good_CRC_th = 0;
2970 band = IEEE80211_BAND_2GHZ;
2971 } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2972 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2973 /*
2974 * If active scaning is requested but a certain channel
2975 * is marked passive, we can do active scanning if we
2976 * detect transmissions.
2977 */
2978 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2979 band = IEEE80211_BAND_5GHZ;
2980 } else {
2981 IWL_WARN(priv, "Invalid scan band count\n");
2982 goto done;
2983 }
2984
2985 scan->tx_cmd.len = cpu_to_le16(
2986 iwl_fill_probe_req(priv,
2987 (struct ieee80211_mgmt *)scan->data,
2988 priv->scan_request->ie,
2989 priv->scan_request->ie_len,
2990 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2991
2992 /* select Rx antennas */
2993 scan->flags |= iwl3945_get_antenna_flags(priv);
2994
2995 if (iwl_is_monitor_mode(priv))
2996 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2997
2998 scan->channel_count =
2999 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3000 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3001
3002 if (scan->channel_count == 0) {
3003 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3004 goto done;
3005 }
3006
3007 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3008 scan->channel_count * sizeof(struct iwl3945_scan_channel);
3009 cmd.data = scan;
3010 scan->len = cpu_to_le16(cmd.len);
3011
3012 set_bit(STATUS_SCAN_HW, &priv->status);
3013 rc = iwl_send_cmd_sync(priv, &cmd);
3014 if (rc)
3015 goto done;
3016
3017 queue_delayed_work(priv->workqueue, &priv->scan_check,
3018 IWL_SCAN_CHECK_WATCHDOG);
3019
3020 mutex_unlock(&priv->mutex);
3021 return;
3022
3023 done:
3024 /* can not perform scan make sure we clear scanning
3025 * bits from status so next scan request can be performed.
3026 * if we dont clear scanning status bit here all next scan
3027 * will fail
3028 */
3029 clear_bit(STATUS_SCAN_HW, &priv->status);
3030 clear_bit(STATUS_SCANNING, &priv->status);
3031
3032 /* inform mac80211 scan aborted */
3033 queue_work(priv->workqueue, &priv->scan_completed);
3034 mutex_unlock(&priv->mutex);
3035 }
3036
3037 static void iwl3945_bg_up(struct work_struct *data)
3038 {
3039 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3040
3041 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3042 return;
3043
3044 mutex_lock(&priv->mutex);
3045 __iwl3945_up(priv);
3046 mutex_unlock(&priv->mutex);
3047 }
3048
3049 static void iwl3945_bg_restart(struct work_struct *data)
3050 {
3051 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3052
3053 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3054 return;
3055
3056 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3057 mutex_lock(&priv->mutex);
3058 priv->vif = NULL;
3059 priv->is_open = 0;
3060 mutex_unlock(&priv->mutex);
3061 iwl3945_down(priv);
3062 ieee80211_restart_hw(priv->hw);
3063 } else {
3064 iwl3945_down(priv);
3065 queue_work(priv->workqueue, &priv->up);
3066 }
3067 }
3068
3069 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3070 {
3071 struct iwl_priv *priv =
3072 container_of(data, struct iwl_priv, rx_replenish);
3073
3074 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3075 return;
3076
3077 mutex_lock(&priv->mutex);
3078 iwl3945_rx_replenish(priv);
3079 mutex_unlock(&priv->mutex);
3080 }
3081
3082 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3083
3084 void iwl3945_post_associate(struct iwl_priv *priv)
3085 {
3086 int rc = 0;
3087 struct ieee80211_conf *conf = NULL;
3088
3089 if (priv->iw_mode == NL80211_IFTYPE_AP) {
3090 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3091 return;
3092 }
3093
3094
3095 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3096 priv->assoc_id, priv->active_rxon.bssid_addr);
3097
3098 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3099 return;
3100
3101 if (!priv->vif || !priv->is_open)
3102 return;
3103
3104 iwl_scan_cancel_timeout(priv, 200);
3105
3106 conf = ieee80211_get_hw_conf(priv->hw);
3107
3108 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3109 iwlcore_commit_rxon(priv);
3110
3111 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3112 iwl_setup_rxon_timing(priv);
3113 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3114 sizeof(priv->rxon_timing), &priv->rxon_timing);
3115 if (rc)
3116 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3117 "Attempting to continue.\n");
3118
3119 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3120
3121 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3122
3123 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3124 priv->assoc_id, priv->beacon_int);
3125
3126 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3127 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3128 else
3129 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3130
3131 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3132 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3133 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3134 else
3135 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3136
3137 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3138 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3139
3140 }
3141
3142 iwlcore_commit_rxon(priv);
3143
3144 switch (priv->iw_mode) {
3145 case NL80211_IFTYPE_STATION:
3146 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3147 break;
3148
3149 case NL80211_IFTYPE_ADHOC:
3150
3151 priv->assoc_id = 1;
3152 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3153 iwl3945_sync_sta(priv, IWL_STA_ID,
3154 (priv->band == IEEE80211_BAND_5GHZ) ?
3155 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3156 CMD_ASYNC);
3157 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3158 iwl3945_send_beacon_cmd(priv);
3159
3160 break;
3161
3162 default:
3163 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3164 __func__, priv->iw_mode);
3165 break;
3166 }
3167
3168 iwl_activate_qos(priv, 0);
3169
3170 /* we have just associated, don't start scan too early */
3171 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3172 }
3173
3174 /*****************************************************************************
3175 *
3176 * mac80211 entry point functions
3177 *
3178 *****************************************************************************/
3179
3180 #define UCODE_READY_TIMEOUT (2 * HZ)
3181
3182 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3183 {
3184 struct iwl_priv *priv = hw->priv;
3185 int ret;
3186
3187 IWL_DEBUG_MAC80211(priv, "enter\n");
3188
3189 /* we should be verifying the device is ready to be opened */
3190 mutex_lock(&priv->mutex);
3191
3192 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3193 * ucode filename and max sizes are card-specific. */
3194
3195 if (!priv->ucode_code.len) {
3196 ret = iwl3945_read_ucode(priv);
3197 if (ret) {
3198 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3199 mutex_unlock(&priv->mutex);
3200 goto out_release_irq;
3201 }
3202 }
3203
3204 ret = __iwl3945_up(priv);
3205
3206 mutex_unlock(&priv->mutex);
3207
3208 if (ret)
3209 goto out_release_irq;
3210
3211 IWL_DEBUG_INFO(priv, "Start UP work.\n");
3212
3213 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3214 * mac80211 will not be run successfully. */
3215 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3216 test_bit(STATUS_READY, &priv->status),
3217 UCODE_READY_TIMEOUT);
3218 if (!ret) {
3219 if (!test_bit(STATUS_READY, &priv->status)) {
3220 IWL_ERR(priv,
3221 "Wait for START_ALIVE timeout after %dms.\n",
3222 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3223 ret = -ETIMEDOUT;
3224 goto out_release_irq;
3225 }
3226 }
3227
3228 /* ucode is running and will send rfkill notifications,
3229 * no need to poll the killswitch state anymore */
3230 cancel_delayed_work(&priv->rfkill_poll);
3231
3232 iwl_led_start(priv);
3233
3234 priv->is_open = 1;
3235 IWL_DEBUG_MAC80211(priv, "leave\n");
3236 return 0;
3237
3238 out_release_irq:
3239 priv->is_open = 0;
3240 IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3241 return ret;
3242 }
3243
3244 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3245 {
3246 struct iwl_priv *priv = hw->priv;
3247
3248 IWL_DEBUG_MAC80211(priv, "enter\n");
3249
3250 if (!priv->is_open) {
3251 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3252 return;
3253 }
3254
3255 priv->is_open = 0;
3256
3257 if (iwl_is_ready_rf(priv)) {
3258 /* stop mac, cancel any scan request and clear
3259 * RXON_FILTER_ASSOC_MSK BIT
3260 */
3261 mutex_lock(&priv->mutex);
3262 iwl_scan_cancel_timeout(priv, 100);
3263 mutex_unlock(&priv->mutex);
3264 }
3265
3266 iwl3945_down(priv);
3267
3268 flush_workqueue(priv->workqueue);
3269
3270 /* start polling the killswitch state again */
3271 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3272 round_jiffies_relative(2 * HZ));
3273
3274 IWL_DEBUG_MAC80211(priv, "leave\n");
3275 }
3276
3277 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3278 {
3279 struct iwl_priv *priv = hw->priv;
3280
3281 IWL_DEBUG_MAC80211(priv, "enter\n");
3282
3283 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3284 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3285
3286 if (iwl3945_tx_skb(priv, skb))
3287 dev_kfree_skb_any(skb);
3288
3289 IWL_DEBUG_MAC80211(priv, "leave\n");
3290 return NETDEV_TX_OK;
3291 }
3292
3293 void iwl3945_config_ap(struct iwl_priv *priv)
3294 {
3295 int rc = 0;
3296
3297 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3298 return;
3299
3300 /* The following should be done only at AP bring up */
3301 if (!(iwl_is_associated(priv))) {
3302
3303 /* RXON - unassoc (to set timing command) */
3304 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3305 iwlcore_commit_rxon(priv);
3306
3307 /* RXON Timing */
3308 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3309 iwl_setup_rxon_timing(priv);
3310 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3311 sizeof(priv->rxon_timing),
3312 &priv->rxon_timing);
3313 if (rc)
3314 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3315 "Attempting to continue.\n");
3316
3317 /* FIXME: what should be the assoc_id for AP? */
3318 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3319 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3320 priv->staging_rxon.flags |=
3321 RXON_FLG_SHORT_PREAMBLE_MSK;
3322 else
3323 priv->staging_rxon.flags &=
3324 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3325
3326 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3327 if (priv->assoc_capability &
3328 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3329 priv->staging_rxon.flags |=
3330 RXON_FLG_SHORT_SLOT_MSK;
3331 else
3332 priv->staging_rxon.flags &=
3333 ~RXON_FLG_SHORT_SLOT_MSK;
3334
3335 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3336 priv->staging_rxon.flags &=
3337 ~RXON_FLG_SHORT_SLOT_MSK;
3338 }
3339 /* restore RXON assoc */
3340 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3341 iwlcore_commit_rxon(priv);
3342 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3343 }
3344 iwl3945_send_beacon_cmd(priv);
3345
3346 /* FIXME - we need to add code here to detect a totally new
3347 * configuration, reset the AP, unassoc, rxon timing, assoc,
3348 * clear sta table, add BCAST sta... */
3349 }
3350
3351 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3352 struct ieee80211_vif *vif,
3353 struct ieee80211_sta *sta,
3354 struct ieee80211_key_conf *key)
3355 {
3356 struct iwl_priv *priv = hw->priv;
3357 const u8 *addr;
3358 int ret = 0;
3359 u8 sta_id = IWL_INVALID_STATION;
3360 u8 static_key;
3361
3362 IWL_DEBUG_MAC80211(priv, "enter\n");
3363
3364 if (iwl3945_mod_params.sw_crypto) {
3365 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3366 return -EOPNOTSUPP;
3367 }
3368
3369 addr = sta ? sta->addr : iwl_bcast_addr;
3370 static_key = !iwl_is_associated(priv);
3371
3372 if (!static_key) {
3373 sta_id = iwl_find_station(priv, addr);
3374 if (sta_id == IWL_INVALID_STATION) {
3375 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3376 addr);
3377 return -EINVAL;
3378 }
3379 }
3380
3381 mutex_lock(&priv->mutex);
3382 iwl_scan_cancel_timeout(priv, 100);
3383 mutex_unlock(&priv->mutex);
3384
3385 switch (cmd) {
3386 case SET_KEY:
3387 if (static_key)
3388 ret = iwl3945_set_static_key(priv, key);
3389 else
3390 ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3391 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3392 break;
3393 case DISABLE_KEY:
3394 if (static_key)
3395 ret = iwl3945_remove_static_key(priv);
3396 else
3397 ret = iwl3945_clear_sta_key_info(priv, sta_id);
3398 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3399 break;
3400 default:
3401 ret = -EINVAL;
3402 }
3403
3404 IWL_DEBUG_MAC80211(priv, "leave\n");
3405
3406 return ret;
3407 }
3408
3409 /*****************************************************************************
3410 *
3411 * sysfs attributes
3412 *
3413 *****************************************************************************/
3414
3415 #ifdef CONFIG_IWLWIFI_DEBUG
3416
3417 /*
3418 * The following adds a new attribute to the sysfs representation
3419 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3420 * used for controlling the debug level.
3421 *
3422 * See the level definitions in iwl for details.
3423 *
3424 * The debug_level being managed using sysfs below is a per device debug
3425 * level that is used instead of the global debug level if it (the per
3426 * device debug level) is set.
3427 */
3428 static ssize_t show_debug_level(struct device *d,
3429 struct device_attribute *attr, char *buf)
3430 {
3431 struct iwl_priv *priv = dev_get_drvdata(d);
3432 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3433 }
3434 static ssize_t store_debug_level(struct device *d,
3435 struct device_attribute *attr,
3436 const char *buf, size_t count)
3437 {
3438 struct iwl_priv *priv = dev_get_drvdata(d);
3439 unsigned long val;
3440 int ret;
3441
3442 ret = strict_strtoul(buf, 0, &val);
3443 if (ret)
3444 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3445 else {
3446 priv->debug_level = val;
3447 if (iwl_alloc_traffic_mem(priv))
3448 IWL_ERR(priv,
3449 "Not enough memory to generate traffic log\n");
3450 }
3451 return strnlen(buf, count);
3452 }
3453
3454 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3455 show_debug_level, store_debug_level);
3456
3457 #endif /* CONFIG_IWLWIFI_DEBUG */
3458
3459 static ssize_t show_temperature(struct device *d,
3460 struct device_attribute *attr, char *buf)
3461 {
3462 struct iwl_priv *priv = dev_get_drvdata(d);
3463
3464 if (!iwl_is_alive(priv))
3465 return -EAGAIN;
3466
3467 return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3468 }
3469
3470 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3471
3472 static ssize_t show_tx_power(struct device *d,
3473 struct device_attribute *attr, char *buf)
3474 {
3475 struct iwl_priv *priv = dev_get_drvdata(d);
3476 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3477 }
3478
3479 static ssize_t store_tx_power(struct device *d,
3480 struct device_attribute *attr,
3481 const char *buf, size_t count)
3482 {
3483 struct iwl_priv *priv = dev_get_drvdata(d);
3484 char *p = (char *)buf;
3485 u32 val;
3486
3487 val = simple_strtoul(p, &p, 10);
3488 if (p == buf)
3489 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3490 else
3491 iwl3945_hw_reg_set_txpower(priv, val);
3492
3493 return count;
3494 }
3495
3496 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3497
3498 static ssize_t show_flags(struct device *d,
3499 struct device_attribute *attr, char *buf)
3500 {
3501 struct iwl_priv *priv = dev_get_drvdata(d);
3502
3503 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3504 }
3505
3506 static ssize_t store_flags(struct device *d,
3507 struct device_attribute *attr,
3508 const char *buf, size_t count)
3509 {
3510 struct iwl_priv *priv = dev_get_drvdata(d);
3511 u32 flags = simple_strtoul(buf, NULL, 0);
3512
3513 mutex_lock(&priv->mutex);
3514 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3515 /* Cancel any currently running scans... */
3516 if (iwl_scan_cancel_timeout(priv, 100))
3517 IWL_WARN(priv, "Could not cancel scan.\n");
3518 else {
3519 IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3520 flags);
3521 priv->staging_rxon.flags = cpu_to_le32(flags);
3522 iwlcore_commit_rxon(priv);
3523 }
3524 }
3525 mutex_unlock(&priv->mutex);
3526
3527 return count;
3528 }
3529
3530 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3531
3532 static ssize_t show_filter_flags(struct device *d,
3533 struct device_attribute *attr, char *buf)
3534 {
3535 struct iwl_priv *priv = dev_get_drvdata(d);
3536
3537 return sprintf(buf, "0x%04X\n",
3538 le32_to_cpu(priv->active_rxon.filter_flags));
3539 }
3540
3541 static ssize_t store_filter_flags(struct device *d,
3542 struct device_attribute *attr,
3543 const char *buf, size_t count)
3544 {
3545 struct iwl_priv *priv = dev_get_drvdata(d);
3546 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3547
3548 mutex_lock(&priv->mutex);
3549 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3550 /* Cancel any currently running scans... */
3551 if (iwl_scan_cancel_timeout(priv, 100))
3552 IWL_WARN(priv, "Could not cancel scan.\n");
3553 else {
3554 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3555 "0x%04X\n", filter_flags);
3556 priv->staging_rxon.filter_flags =
3557 cpu_to_le32(filter_flags);
3558 iwlcore_commit_rxon(priv);
3559 }
3560 }
3561 mutex_unlock(&priv->mutex);
3562
3563 return count;
3564 }
3565
3566 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3567 store_filter_flags);
3568
3569 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3570
3571 static ssize_t show_measurement(struct device *d,
3572 struct device_attribute *attr, char *buf)
3573 {
3574 struct iwl_priv *priv = dev_get_drvdata(d);
3575 struct iwl_spectrum_notification measure_report;
3576 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3577 u8 *data = (u8 *)&measure_report;
3578 unsigned long flags;
3579
3580 spin_lock_irqsave(&priv->lock, flags);
3581 if (!(priv->measurement_status & MEASUREMENT_READY)) {
3582 spin_unlock_irqrestore(&priv->lock, flags);
3583 return 0;
3584 }
3585 memcpy(&measure_report, &priv->measure_report, size);
3586 priv->measurement_status = 0;
3587 spin_unlock_irqrestore(&priv->lock, flags);
3588
3589 while (size && (PAGE_SIZE - len)) {
3590 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3591 PAGE_SIZE - len, 1);
3592 len = strlen(buf);
3593 if (PAGE_SIZE - len)
3594 buf[len++] = '\n';
3595
3596 ofs += 16;
3597 size -= min(size, 16U);
3598 }
3599
3600 return len;
3601 }
3602
3603 static ssize_t store_measurement(struct device *d,
3604 struct device_attribute *attr,
3605 const char *buf, size_t count)
3606 {
3607 struct iwl_priv *priv = dev_get_drvdata(d);
3608 struct ieee80211_measurement_params params = {
3609 .channel = le16_to_cpu(priv->active_rxon.channel),
3610 .start_time = cpu_to_le64(priv->last_tsf),
3611 .duration = cpu_to_le16(1),
3612 };
3613 u8 type = IWL_MEASURE_BASIC;
3614 u8 buffer[32];
3615 u8 channel;
3616
3617 if (count) {
3618 char *p = buffer;
3619 strncpy(buffer, buf, min(sizeof(buffer), count));
3620 channel = simple_strtoul(p, NULL, 0);
3621 if (channel)
3622 params.channel = channel;
3623
3624 p = buffer;
3625 while (*p && *p != ' ')
3626 p++;
3627 if (*p)
3628 type = simple_strtoul(p + 1, NULL, 0);
3629 }
3630
3631 IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3632 "channel %d (for '%s')\n", type, params.channel, buf);
3633 iwl3945_get_measurement(priv, &params, type);
3634
3635 return count;
3636 }
3637
3638 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3639 show_measurement, store_measurement);
3640 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3641
3642 static ssize_t store_retry_rate(struct device *d,
3643 struct device_attribute *attr,
3644 const char *buf, size_t count)
3645 {
3646 struct iwl_priv *priv = dev_get_drvdata(d);
3647
3648 priv->retry_rate = simple_strtoul(buf, NULL, 0);
3649 if (priv->retry_rate <= 0)
3650 priv->retry_rate = 1;
3651
3652 return count;
3653 }
3654
3655 static ssize_t show_retry_rate(struct device *d,
3656 struct device_attribute *attr, char *buf)
3657 {
3658 struct iwl_priv *priv = dev_get_drvdata(d);
3659 return sprintf(buf, "%d", priv->retry_rate);
3660 }
3661
3662 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3663 store_retry_rate);
3664
3665
3666 static ssize_t show_channels(struct device *d,
3667 struct device_attribute *attr, char *buf)
3668 {
3669 /* all this shit doesn't belong into sysfs anyway */
3670 return 0;
3671 }
3672
3673 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3674
3675 static ssize_t show_statistics(struct device *d,
3676 struct device_attribute *attr, char *buf)
3677 {
3678 struct iwl_priv *priv = dev_get_drvdata(d);
3679 u32 size = sizeof(struct iwl3945_notif_statistics);
3680 u32 len = 0, ofs = 0;
3681 u8 *data = (u8 *)&priv->statistics_39;
3682 int rc = 0;
3683
3684 if (!iwl_is_alive(priv))
3685 return -EAGAIN;
3686
3687 mutex_lock(&priv->mutex);
3688 rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3689 mutex_unlock(&priv->mutex);
3690
3691 if (rc) {
3692 len = sprintf(buf,
3693 "Error sending statistics request: 0x%08X\n", rc);
3694 return len;
3695 }
3696
3697 while (size && (PAGE_SIZE - len)) {
3698 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3699 PAGE_SIZE - len, 1);
3700 len = strlen(buf);
3701 if (PAGE_SIZE - len)
3702 buf[len++] = '\n';
3703
3704 ofs += 16;
3705 size -= min(size, 16U);
3706 }
3707
3708 return len;
3709 }
3710
3711 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3712
3713 static ssize_t show_antenna(struct device *d,
3714 struct device_attribute *attr, char *buf)
3715 {
3716 struct iwl_priv *priv = dev_get_drvdata(d);
3717
3718 if (!iwl_is_alive(priv))
3719 return -EAGAIN;
3720
3721 return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3722 }
3723
3724 static ssize_t store_antenna(struct device *d,
3725 struct device_attribute *attr,
3726 const char *buf, size_t count)
3727 {
3728 struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3729 int ant;
3730
3731 if (count == 0)
3732 return 0;
3733
3734 if (sscanf(buf, "%1i", &ant) != 1) {
3735 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3736 return count;
3737 }
3738
3739 if ((ant >= 0) && (ant <= 2)) {
3740 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3741 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3742 } else
3743 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3744
3745
3746 return count;
3747 }
3748
3749 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3750
3751 static ssize_t show_status(struct device *d,
3752 struct device_attribute *attr, char *buf)
3753 {
3754 struct iwl_priv *priv = dev_get_drvdata(d);
3755 if (!iwl_is_alive(priv))
3756 return -EAGAIN;
3757 return sprintf(buf, "0x%08x\n", (int)priv->status);
3758 }
3759
3760 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3761
3762 static ssize_t dump_error_log(struct device *d,
3763 struct device_attribute *attr,
3764 const char *buf, size_t count)
3765 {
3766 struct iwl_priv *priv = dev_get_drvdata(d);
3767 char *p = (char *)buf;
3768
3769 if (p[0] == '1')
3770 iwl3945_dump_nic_error_log(priv);
3771
3772 return strnlen(buf, count);
3773 }
3774
3775 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3776
3777 /*****************************************************************************
3778 *
3779 * driver setup and tear down
3780 *
3781 *****************************************************************************/
3782
3783 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3784 {
3785 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3786
3787 init_waitqueue_head(&priv->wait_command_queue);
3788
3789 INIT_WORK(&priv->up, iwl3945_bg_up);
3790 INIT_WORK(&priv->restart, iwl3945_bg_restart);
3791 INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3792 INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3793 INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3794 INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3795 INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3796 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3797 INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3798 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3799 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3800
3801 iwl3945_hw_setup_deferred_work(priv);
3802
3803 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3804 iwl3945_irq_tasklet, (unsigned long)priv);
3805 }
3806
3807 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3808 {
3809 iwl3945_hw_cancel_deferred_work(priv);
3810
3811 cancel_delayed_work_sync(&priv->init_alive_start);
3812 cancel_delayed_work(&priv->scan_check);
3813 cancel_delayed_work(&priv->alive_start);
3814 cancel_work_sync(&priv->beacon_update);
3815 }
3816
3817 static struct attribute *iwl3945_sysfs_entries[] = {
3818 &dev_attr_antenna.attr,
3819 &dev_attr_channels.attr,
3820 &dev_attr_dump_errors.attr,
3821 &dev_attr_flags.attr,
3822 &dev_attr_filter_flags.attr,
3823 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3824 &dev_attr_measurement.attr,
3825 #endif
3826 &dev_attr_retry_rate.attr,
3827 &dev_attr_statistics.attr,
3828 &dev_attr_status.attr,
3829 &dev_attr_temperature.attr,
3830 &dev_attr_tx_power.attr,
3831 #ifdef CONFIG_IWLWIFI_DEBUG
3832 &dev_attr_debug_level.attr,
3833 #endif
3834 NULL
3835 };
3836
3837 static struct attribute_group iwl3945_attribute_group = {
3838 .name = NULL, /* put in device directory */
3839 .attrs = iwl3945_sysfs_entries,
3840 };
3841
3842 static struct ieee80211_ops iwl3945_hw_ops = {
3843 .tx = iwl3945_mac_tx,
3844 .start = iwl3945_mac_start,
3845 .stop = iwl3945_mac_stop,
3846 .add_interface = iwl_mac_add_interface,
3847 .remove_interface = iwl_mac_remove_interface,
3848 .config = iwl_mac_config,
3849 .configure_filter = iwl_configure_filter,
3850 .set_key = iwl3945_mac_set_key,
3851 .get_tx_stats = iwl_mac_get_tx_stats,
3852 .conf_tx = iwl_mac_conf_tx,
3853 .reset_tsf = iwl_mac_reset_tsf,
3854 .bss_info_changed = iwl_bss_info_changed,
3855 .hw_scan = iwl_mac_hw_scan
3856 };
3857
3858 static int iwl3945_init_drv(struct iwl_priv *priv)
3859 {
3860 int ret;
3861 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3862
3863 priv->retry_rate = 1;
3864 priv->ibss_beacon = NULL;
3865
3866 spin_lock_init(&priv->lock);
3867 spin_lock_init(&priv->sta_lock);
3868 spin_lock_init(&priv->hcmd_lock);
3869
3870 INIT_LIST_HEAD(&priv->free_frames);
3871
3872 mutex_init(&priv->mutex);
3873
3874 /* Clear the driver's (not device's) station table */
3875 iwl_clear_stations_table(priv);
3876
3877 priv->ieee_channels = NULL;
3878 priv->ieee_rates = NULL;
3879 priv->band = IEEE80211_BAND_2GHZ;
3880
3881 priv->iw_mode = NL80211_IFTYPE_STATION;
3882
3883 iwl_reset_qos(priv);
3884
3885 priv->qos_data.qos_active = 0;
3886 priv->qos_data.qos_cap.val = 0;
3887
3888 priv->rates_mask = IWL_RATES_MASK;
3889 priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3890
3891 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3892 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3893 eeprom->version);
3894 ret = -EINVAL;
3895 goto err;
3896 }
3897 ret = iwl_init_channel_map(priv);
3898 if (ret) {
3899 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3900 goto err;
3901 }
3902
3903 /* Set up txpower settings in driver for all channels */
3904 if (iwl3945_txpower_set_from_eeprom(priv)) {
3905 ret = -EIO;
3906 goto err_free_channel_map;
3907 }
3908
3909 ret = iwlcore_init_geos(priv);
3910 if (ret) {
3911 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3912 goto err_free_channel_map;
3913 }
3914 iwl3945_init_hw_rates(priv, priv->ieee_rates);
3915
3916 return 0;
3917
3918 err_free_channel_map:
3919 iwl_free_channel_map(priv);
3920 err:
3921 return ret;
3922 }
3923
3924 static int iwl3945_setup_mac(struct iwl_priv *priv)
3925 {
3926 int ret;
3927 struct ieee80211_hw *hw = priv->hw;
3928
3929 hw->rate_control_algorithm = "iwl-3945-rs";
3930 hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3931
3932 /* Tell mac80211 our characteristics */
3933 hw->flags = IEEE80211_HW_SIGNAL_DBM |
3934 IEEE80211_HW_NOISE_DBM |
3935 IEEE80211_HW_SPECTRUM_MGMT |
3936 IEEE80211_HW_SUPPORTS_PS |
3937 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3938
3939 hw->wiphy->interface_modes =
3940 BIT(NL80211_IFTYPE_STATION) |
3941 BIT(NL80211_IFTYPE_ADHOC);
3942
3943 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3944 WIPHY_FLAG_DISABLE_BEACON_HINTS;
3945
3946 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3947 /* we create the 802.11 header and a zero-length SSID element */
3948 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3949
3950 /* Default value; 4 EDCA QOS priorities */
3951 hw->queues = 4;
3952
3953 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3954 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3955 &priv->bands[IEEE80211_BAND_2GHZ];
3956
3957 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3958 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3959 &priv->bands[IEEE80211_BAND_5GHZ];
3960
3961 ret = ieee80211_register_hw(priv->hw);
3962 if (ret) {
3963 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3964 return ret;
3965 }
3966 priv->mac80211_registered = 1;
3967
3968 return 0;
3969 }
3970
3971 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3972 {
3973 int err = 0;
3974 struct iwl_priv *priv;
3975 struct ieee80211_hw *hw;
3976 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3977 struct iwl3945_eeprom *eeprom;
3978 unsigned long flags;
3979
3980 /***********************
3981 * 1. Allocating HW data
3982 * ********************/
3983
3984 /* mac80211 allocates memory for this device instance, including
3985 * space for this driver's private structure */
3986 hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3987 if (hw == NULL) {
3988 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3989 err = -ENOMEM;
3990 goto out;
3991 }
3992 priv = hw->priv;
3993 SET_IEEE80211_DEV(hw, &pdev->dev);
3994
3995 /*
3996 * Disabling hardware scan means that mac80211 will perform scans
3997 * "the hard way", rather than using device's scan.
3998 */
3999 if (iwl3945_mod_params.disable_hw_scan) {
4000 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4001 iwl3945_hw_ops.hw_scan = NULL;
4002 }
4003
4004
4005 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4006 priv->cfg = cfg;
4007 priv->pci_dev = pdev;
4008 priv->inta_mask = CSR_INI_SET_MASK;
4009
4010 #ifdef CONFIG_IWLWIFI_DEBUG
4011 atomic_set(&priv->restrict_refcnt, 0);
4012 #endif
4013 if (iwl_alloc_traffic_mem(priv))
4014 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4015
4016 /***************************
4017 * 2. Initializing PCI bus
4018 * *************************/
4019 if (pci_enable_device(pdev)) {
4020 err = -ENODEV;
4021 goto out_ieee80211_free_hw;
4022 }
4023
4024 pci_set_master(pdev);
4025
4026 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4027 if (!err)
4028 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4029 if (err) {
4030 IWL_WARN(priv, "No suitable DMA available.\n");
4031 goto out_pci_disable_device;
4032 }
4033
4034 pci_set_drvdata(pdev, priv);
4035 err = pci_request_regions(pdev, DRV_NAME);
4036 if (err)
4037 goto out_pci_disable_device;
4038
4039 /***********************
4040 * 3. Read REV Register
4041 * ********************/
4042 priv->hw_base = pci_iomap(pdev, 0, 0);
4043 if (!priv->hw_base) {
4044 err = -ENODEV;
4045 goto out_pci_release_regions;
4046 }
4047
4048 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4049 (unsigned long long) pci_resource_len(pdev, 0));
4050 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4051
4052 /* We disable the RETRY_TIMEOUT register (0x41) to keep
4053 * PCI Tx retries from interfering with C3 CPU state */
4054 pci_write_config_byte(pdev, 0x41, 0x00);
4055
4056 /* this spin lock will be used in apm_ops.init and EEPROM access
4057 * we should init now
4058 */
4059 spin_lock_init(&priv->reg_lock);
4060
4061 /***********************
4062 * 4. Read EEPROM
4063 * ********************/
4064
4065 /* Read the EEPROM */
4066 err = iwl_eeprom_init(priv);
4067 if (err) {
4068 IWL_ERR(priv, "Unable to init EEPROM\n");
4069 goto out_iounmap;
4070 }
4071 /* MAC Address location in EEPROM same for 3945/4965 */
4072 eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4073 memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4074 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4075 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4076
4077 /***********************
4078 * 5. Setup HW Constants
4079 * ********************/
4080 /* Device-specific setup */
4081 if (iwl3945_hw_set_hw_params(priv)) {
4082 IWL_ERR(priv, "failed to set hw settings\n");
4083 goto out_eeprom_free;
4084 }
4085
4086 /***********************
4087 * 6. Setup priv
4088 * ********************/
4089
4090 err = iwl3945_init_drv(priv);
4091 if (err) {
4092 IWL_ERR(priv, "initializing driver failed\n");
4093 goto out_unset_hw_params;
4094 }
4095
4096 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4097 priv->cfg->name);
4098
4099 /***********************
4100 * 7. Setup Services
4101 * ********************/
4102
4103 spin_lock_irqsave(&priv->lock, flags);
4104 iwl_disable_interrupts(priv);
4105 spin_unlock_irqrestore(&priv->lock, flags);
4106
4107 pci_enable_msi(priv->pci_dev);
4108
4109 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4110 IRQF_SHARED, DRV_NAME, priv);
4111 if (err) {
4112 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4113 goto out_disable_msi;
4114 }
4115
4116 err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4117 if (err) {
4118 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4119 goto out_release_irq;
4120 }
4121
4122 iwl_set_rxon_channel(priv,
4123 &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4124 iwl3945_setup_deferred_work(priv);
4125 iwl3945_setup_rx_handlers(priv);
4126 iwl_power_initialize(priv);
4127
4128 /*********************************
4129 * 8. Setup and Register mac80211
4130 * *******************************/
4131
4132 iwl_enable_interrupts(priv);
4133
4134 err = iwl3945_setup_mac(priv);
4135 if (err)
4136 goto out_remove_sysfs;
4137
4138 err = iwl_dbgfs_register(priv, DRV_NAME);
4139 if (err)
4140 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4141
4142 /* Start monitoring the killswitch */
4143 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4144 2 * HZ);
4145
4146 return 0;
4147
4148 out_remove_sysfs:
4149 destroy_workqueue(priv->workqueue);
4150 priv->workqueue = NULL;
4151 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4152 out_release_irq:
4153 free_irq(priv->pci_dev->irq, priv);
4154 out_disable_msi:
4155 pci_disable_msi(priv->pci_dev);
4156 iwlcore_free_geos(priv);
4157 iwl_free_channel_map(priv);
4158 out_unset_hw_params:
4159 iwl3945_unset_hw_params(priv);
4160 out_eeprom_free:
4161 iwl_eeprom_free(priv);
4162 out_iounmap:
4163 pci_iounmap(pdev, priv->hw_base);
4164 out_pci_release_regions:
4165 pci_release_regions(pdev);
4166 out_pci_disable_device:
4167 pci_set_drvdata(pdev, NULL);
4168 pci_disable_device(pdev);
4169 out_ieee80211_free_hw:
4170 iwl_free_traffic_mem(priv);
4171 ieee80211_free_hw(priv->hw);
4172 out:
4173 return err;
4174 }
4175
4176 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4177 {
4178 struct iwl_priv *priv = pci_get_drvdata(pdev);
4179 unsigned long flags;
4180
4181 if (!priv)
4182 return;
4183
4184 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4185
4186 iwl_dbgfs_unregister(priv);
4187
4188 set_bit(STATUS_EXIT_PENDING, &priv->status);
4189
4190 if (priv->mac80211_registered) {
4191 ieee80211_unregister_hw(priv->hw);
4192 priv->mac80211_registered = 0;
4193 } else {
4194 iwl3945_down(priv);
4195 }
4196
4197 /*
4198 * Make sure device is reset to low power before unloading driver.
4199 * This may be redundant with iwl_down(), but there are paths to
4200 * run iwl_down() without calling apm_ops.stop(), and there are
4201 * paths to avoid running iwl_down() at all before leaving driver.
4202 * This (inexpensive) call *makes sure* device is reset.
4203 */
4204 priv->cfg->ops->lib->apm_ops.stop(priv);
4205
4206 /* make sure we flush any pending irq or
4207 * tasklet for the driver
4208 */
4209 spin_lock_irqsave(&priv->lock, flags);
4210 iwl_disable_interrupts(priv);
4211 spin_unlock_irqrestore(&priv->lock, flags);
4212
4213 iwl_synchronize_irq(priv);
4214
4215 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4216
4217 cancel_delayed_work_sync(&priv->rfkill_poll);
4218
4219 iwl3945_dealloc_ucode_pci(priv);
4220
4221 if (priv->rxq.bd)
4222 iwl3945_rx_queue_free(priv, &priv->rxq);
4223 iwl3945_hw_txq_ctx_free(priv);
4224
4225 iwl3945_unset_hw_params(priv);
4226 iwl_clear_stations_table(priv);
4227
4228 /*netif_stop_queue(dev); */
4229 flush_workqueue(priv->workqueue);
4230
4231 /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4232 * priv->workqueue... so we can't take down the workqueue
4233 * until now... */
4234 destroy_workqueue(priv->workqueue);
4235 priv->workqueue = NULL;
4236 iwl_free_traffic_mem(priv);
4237
4238 free_irq(pdev->irq, priv);
4239 pci_disable_msi(pdev);
4240
4241 pci_iounmap(pdev, priv->hw_base);
4242 pci_release_regions(pdev);
4243 pci_disable_device(pdev);
4244 pci_set_drvdata(pdev, NULL);
4245
4246 iwl_free_channel_map(priv);
4247 iwlcore_free_geos(priv);
4248 kfree(priv->scan);
4249 if (priv->ibss_beacon)
4250 dev_kfree_skb(priv->ibss_beacon);
4251
4252 ieee80211_free_hw(priv->hw);
4253 }
4254
4255
4256 /*****************************************************************************
4257 *
4258 * driver and module entry point
4259 *
4260 *****************************************************************************/
4261
4262 static struct pci_driver iwl3945_driver = {
4263 .name = DRV_NAME,
4264 .id_table = iwl3945_hw_card_ids,
4265 .probe = iwl3945_pci_probe,
4266 .remove = __devexit_p(iwl3945_pci_remove),
4267 #ifdef CONFIG_PM
4268 .suspend = iwl_pci_suspend,
4269 .resume = iwl_pci_resume,
4270 #endif
4271 };
4272
4273 static int __init iwl3945_init(void)
4274 {
4275
4276 int ret;
4277 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4278 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4279
4280 ret = iwl3945_rate_control_register();
4281 if (ret) {
4282 printk(KERN_ERR DRV_NAME
4283 "Unable to register rate control algorithm: %d\n", ret);
4284 return ret;
4285 }
4286
4287 ret = pci_register_driver(&iwl3945_driver);
4288 if (ret) {
4289 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4290 goto error_register;
4291 }
4292
4293 return ret;
4294
4295 error_register:
4296 iwl3945_rate_control_unregister();
4297 return ret;
4298 }
4299
4300 static void __exit iwl3945_exit(void)
4301 {
4302 pci_unregister_driver(&iwl3945_driver);
4303 iwl3945_rate_control_unregister();
4304 }
4305
4306 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4307
4308 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4309 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4310 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4311 MODULE_PARM_DESC(swcrypto,
4312 "using software crypto (default 1 [software])\n");
4313 #ifdef CONFIG_IWLWIFI_DEBUG
4314 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4315 MODULE_PARM_DESC(debug, "debug output mask");
4316 #endif
4317 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4318 int, S_IRUGO);
4319 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4320 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4321 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4322
4323 module_exit(iwl3945_exit);
4324 module_init(iwl3945_init);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree