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iwlwifi: MAC_ACCESS_REQ cleanup
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/wireless.h>
39 #include <linux/firmware.h>
40 #include <linux/etherdevice.h>
41 #include <linux/if_arp.h>
42
43 #include <net/ieee80211_radiotap.h>
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #define DRV_NAME "iwl3945"
49
50 #include "iwl-fh.h"
51 #include "iwl-3945-fh.h"
52 #include "iwl-commands.h"
53 #include "iwl-sta.h"
54 #include "iwl-3945.h"
55 #include "iwl-helpers.h"
56 #include "iwl-core.h"
57 #include "iwl-dev.h"
58
59 /*
60 * module name, copyright, version, etc.
61 */
62
63 #define DRV_DESCRIPTION \
64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
65
66 #ifdef CONFIG_IWLWIFI_DEBUG
67 #define VD "d"
68 #else
69 #define VD
70 #endif
71
72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
73 #define VS "s"
74 #else
75 #define VS
76 #endif
77
78 #define IWL39_VERSION "1.2.26k" VD VS
79 #define DRV_COPYRIGHT "Copyright(c) 2003-2009 Intel Corporation"
80 #define DRV_AUTHOR "<ilw@linux.intel.com>"
81 #define DRV_VERSION IWL39_VERSION
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88
89 /* module parameters */
90 struct iwl_mod_params iwl3945_mod_params = {
91 .sw_crypto = 1,
92 .restart_fw = 1,
93 /* the rest are 0 by default */
94 };
95
96 /**
97 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
98 * @priv: eeprom and antenna fields are used to determine antenna flags
99 *
100 * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
101 * iwl3945_mod_params.antenna specifies the antenna diversity mode:
102 *
103 * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
104 * IWL_ANTENNA_MAIN - Force MAIN antenna
105 * IWL_ANTENNA_AUX - Force AUX antenna
106 */
107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
108 {
109 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
110
111 switch (iwl3945_mod_params.antenna) {
112 case IWL_ANTENNA_DIVERSITY:
113 return 0;
114
115 case IWL_ANTENNA_MAIN:
116 if (eeprom->antenna_switch_type)
117 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
118 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
119
120 case IWL_ANTENNA_AUX:
121 if (eeprom->antenna_switch_type)
122 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
123 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
124 }
125
126 /* bad antenna selector value */
127 IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
128 iwl3945_mod_params.antenna);
129
130 return 0; /* "diversity" is default if error */
131 }
132
133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
134 struct ieee80211_key_conf *keyconf,
135 u8 sta_id)
136 {
137 unsigned long flags;
138 __le16 key_flags = 0;
139 int ret;
140
141 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
142 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
143
144 if (sta_id == priv->hw_params.bcast_sta_id)
145 key_flags |= STA_KEY_MULTICAST_MSK;
146
147 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
148 keyconf->hw_key_idx = keyconf->keyidx;
149 key_flags &= ~STA_KEY_FLG_INVALID;
150
151 spin_lock_irqsave(&priv->sta_lock, flags);
152 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
153 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
154 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
155 keyconf->keylen);
156
157 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
158 keyconf->keylen);
159
160 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
161 == STA_KEY_FLG_NO_ENC)
162 priv->stations[sta_id].sta.key.key_offset =
163 iwl_get_free_ucode_key_index(priv);
164 /* else, we are overriding an existing key => no need to allocated room
165 * in uCode. */
166
167 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
168 "no space for a new key");
169
170 priv->stations[sta_id].sta.key.key_flags = key_flags;
171 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
172 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
173
174 IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
175
176 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
177
178 spin_unlock_irqrestore(&priv->sta_lock, flags);
179
180 return ret;
181 }
182
183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
184 struct ieee80211_key_conf *keyconf,
185 u8 sta_id)
186 {
187 return -EOPNOTSUPP;
188 }
189
190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
191 struct ieee80211_key_conf *keyconf,
192 u8 sta_id)
193 {
194 return -EOPNOTSUPP;
195 }
196
197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
198 {
199 unsigned long flags;
200
201 spin_lock_irqsave(&priv->sta_lock, flags);
202 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
203 memset(&priv->stations[sta_id].sta.key, 0,
204 sizeof(struct iwl4965_keyinfo));
205 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
206 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
207 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
208 spin_unlock_irqrestore(&priv->sta_lock, flags);
209
210 IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
211 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
212 return 0;
213 }
214
215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
216 struct ieee80211_key_conf *keyconf, u8 sta_id)
217 {
218 int ret = 0;
219
220 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
221
222 switch (keyconf->alg) {
223 case ALG_CCMP:
224 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
225 break;
226 case ALG_TKIP:
227 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
228 break;
229 case ALG_WEP:
230 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
231 break;
232 default:
233 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
234 ret = -EINVAL;
235 }
236
237 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
238 keyconf->alg, keyconf->keylen, keyconf->keyidx,
239 sta_id, ret);
240
241 return ret;
242 }
243
244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
245 {
246 int ret = -EOPNOTSUPP;
247
248 return ret;
249 }
250
251 static int iwl3945_set_static_key(struct iwl_priv *priv,
252 struct ieee80211_key_conf *key)
253 {
254 if (key->alg == ALG_WEP)
255 return -EOPNOTSUPP;
256
257 IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
258 return -EINVAL;
259 }
260
261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
262 {
263 struct list_head *element;
264
265 IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
266 priv->frames_count);
267
268 while (!list_empty(&priv->free_frames)) {
269 element = priv->free_frames.next;
270 list_del(element);
271 kfree(list_entry(element, struct iwl3945_frame, list));
272 priv->frames_count--;
273 }
274
275 if (priv->frames_count) {
276 IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
277 priv->frames_count);
278 priv->frames_count = 0;
279 }
280 }
281
282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
283 {
284 struct iwl3945_frame *frame;
285 struct list_head *element;
286 if (list_empty(&priv->free_frames)) {
287 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
288 if (!frame) {
289 IWL_ERR(priv, "Could not allocate frame!\n");
290 return NULL;
291 }
292
293 priv->frames_count++;
294 return frame;
295 }
296
297 element = priv->free_frames.next;
298 list_del(element);
299 return list_entry(element, struct iwl3945_frame, list);
300 }
301
302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
303 {
304 memset(frame, 0, sizeof(*frame));
305 list_add(&frame->list, &priv->free_frames);
306 }
307
308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
309 struct ieee80211_hdr *hdr,
310 int left)
311 {
312
313 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
314 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
315 (priv->iw_mode != NL80211_IFTYPE_AP)))
316 return 0;
317
318 if (priv->ibss_beacon->len > left)
319 return 0;
320
321 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
322
323 return priv->ibss_beacon->len;
324 }
325
326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
327 {
328 struct iwl3945_frame *frame;
329 unsigned int frame_size;
330 int rc;
331 u8 rate;
332
333 frame = iwl3945_get_free_frame(priv);
334
335 if (!frame) {
336 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
337 "command.\n");
338 return -ENOMEM;
339 }
340
341 rate = iwl_rate_get_lowest_plcp(priv);
342
343 frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
344
345 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
346 &frame->u.cmd[0]);
347
348 iwl3945_free_frame(priv, frame);
349
350 return rc;
351 }
352
353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
354 {
355 if (priv->shared_virt)
356 pci_free_consistent(priv->pci_dev,
357 sizeof(struct iwl3945_shared),
358 priv->shared_virt,
359 priv->shared_phys);
360 }
361
362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
363 struct ieee80211_tx_info *info,
364 struct iwl_device_cmd *cmd,
365 struct sk_buff *skb_frag,
366 int sta_id)
367 {
368 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
369 struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
370
371 switch (keyinfo->alg) {
372 case ALG_CCMP:
373 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
374 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
375 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
376 break;
377
378 case ALG_TKIP:
379 break;
380
381 case ALG_WEP:
382 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
383 (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
384
385 if (keyinfo->keylen == 13)
386 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
387
388 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
389
390 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
391 "with key %d\n", info->control.hw_key->hw_key_idx);
392 break;
393
394 default:
395 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
396 break;
397 }
398 }
399
400 /*
401 * handle build REPLY_TX command notification.
402 */
403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
404 struct iwl_device_cmd *cmd,
405 struct ieee80211_tx_info *info,
406 struct ieee80211_hdr *hdr, u8 std_id)
407 {
408 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
409 __le32 tx_flags = tx_cmd->tx_flags;
410 __le16 fc = hdr->frame_control;
411
412 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
413 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
414 tx_flags |= TX_CMD_FLG_ACK_MSK;
415 if (ieee80211_is_mgmt(fc))
416 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
417 if (ieee80211_is_probe_resp(fc) &&
418 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
419 tx_flags |= TX_CMD_FLG_TSF_MSK;
420 } else {
421 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
422 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
423 }
424
425 tx_cmd->sta_id = std_id;
426 if (ieee80211_has_morefrags(fc))
427 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
428
429 if (ieee80211_is_data_qos(fc)) {
430 u8 *qc = ieee80211_get_qos_ctl(hdr);
431 tx_cmd->tid_tspec = qc[0] & 0xf;
432 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
433 } else {
434 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
435 }
436
437 priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
438
439 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
440 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
441
442 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
443 if (ieee80211_is_mgmt(fc)) {
444 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
445 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
446 else
447 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
448 } else {
449 tx_cmd->timeout.pm_frame_timeout = 0;
450 }
451
452 tx_cmd->driver_txop = 0;
453 tx_cmd->tx_flags = tx_flags;
454 tx_cmd->next_frame_len = 0;
455 }
456
457 /*
458 * start REPLY_TX command process
459 */
460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
461 {
462 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
463 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
464 struct iwl3945_tx_cmd *tx_cmd;
465 struct iwl_tx_queue *txq = NULL;
466 struct iwl_queue *q = NULL;
467 struct iwl_device_cmd *out_cmd;
468 struct iwl_cmd_meta *out_meta;
469 dma_addr_t phys_addr;
470 dma_addr_t txcmd_phys;
471 int txq_id = skb_get_queue_mapping(skb);
472 u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
473 u8 id;
474 u8 unicast;
475 u8 sta_id;
476 u8 tid = 0;
477 u16 seq_number = 0;
478 __le16 fc;
479 u8 wait_write_ptr = 0;
480 u8 *qc = NULL;
481 unsigned long flags;
482 int rc;
483
484 spin_lock_irqsave(&priv->lock, flags);
485 if (iwl_is_rfkill(priv)) {
486 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
487 goto drop_unlock;
488 }
489
490 if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
491 IWL_ERR(priv, "ERROR: No TX rate available.\n");
492 goto drop_unlock;
493 }
494
495 unicast = !is_multicast_ether_addr(hdr->addr1);
496 id = 0;
497
498 fc = hdr->frame_control;
499
500 #ifdef CONFIG_IWLWIFI_DEBUG
501 if (ieee80211_is_auth(fc))
502 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
503 else if (ieee80211_is_assoc_req(fc))
504 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
505 else if (ieee80211_is_reassoc_req(fc))
506 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
507 #endif
508
509 /* drop all non-injected data frame if we are not associated */
510 if (ieee80211_is_data(fc) &&
511 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
512 (!iwl_is_associated(priv) ||
513 ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
514 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
515 goto drop_unlock;
516 }
517
518 spin_unlock_irqrestore(&priv->lock, flags);
519
520 hdr_len = ieee80211_hdrlen(fc);
521
522 /* Find (or create) index into station table for destination station */
523 if (info->flags & IEEE80211_TX_CTL_INJECTED)
524 sta_id = priv->hw_params.bcast_sta_id;
525 else
526 sta_id = iwl_get_sta_id(priv, hdr);
527 if (sta_id == IWL_INVALID_STATION) {
528 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
529 hdr->addr1);
530 goto drop;
531 }
532
533 IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
534
535 if (ieee80211_is_data_qos(fc)) {
536 qc = ieee80211_get_qos_ctl(hdr);
537 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
538 if (unlikely(tid >= MAX_TID_COUNT))
539 goto drop;
540 seq_number = priv->stations[sta_id].tid[tid].seq_number &
541 IEEE80211_SCTL_SEQ;
542 hdr->seq_ctrl = cpu_to_le16(seq_number) |
543 (hdr->seq_ctrl &
544 cpu_to_le16(IEEE80211_SCTL_FRAG));
545 seq_number += 0x10;
546 }
547
548 /* Descriptor for chosen Tx queue */
549 txq = &priv->txq[txq_id];
550 q = &txq->q;
551
552 spin_lock_irqsave(&priv->lock, flags);
553
554 idx = get_cmd_index(q, q->write_ptr, 0);
555
556 /* Set up driver data for this TFD */
557 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
558 txq->txb[q->write_ptr].skb[0] = skb;
559
560 /* Init first empty entry in queue's array of Tx/cmd buffers */
561 out_cmd = txq->cmd[idx];
562 out_meta = &txq->meta[idx];
563 tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
564 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
565 memset(tx_cmd, 0, sizeof(*tx_cmd));
566
567 /*
568 * Set up the Tx-command (not MAC!) header.
569 * Store the chosen Tx queue and TFD index within the sequence field;
570 * after Tx, uCode's Tx response will return this value so driver can
571 * locate the frame within the tx queue and do post-tx processing.
572 */
573 out_cmd->hdr.cmd = REPLY_TX;
574 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
575 INDEX_TO_SEQ(q->write_ptr)));
576
577 /* Copy MAC header from skb into command buffer */
578 memcpy(tx_cmd->hdr, hdr, hdr_len);
579
580
581 if (info->control.hw_key)
582 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
583
584 /* TODO need this for burst mode later on */
585 iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
586
587 /* set is_hcca to 0; it probably will never be implemented */
588 iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
589
590 /* Total # bytes to be transmitted */
591 len = (u16)skb->len;
592 tx_cmd->len = cpu_to_le16(len);
593
594 iwl_dbg_log_tx_data_frame(priv, len, hdr);
595 iwl_update_stats(priv, true, fc, len);
596 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
597 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
598
599 if (!ieee80211_has_morefrags(hdr->frame_control)) {
600 txq->need_update = 1;
601 if (qc)
602 priv->stations[sta_id].tid[tid].seq_number = seq_number;
603 } else {
604 wait_write_ptr = 1;
605 txq->need_update = 0;
606 }
607
608 IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
609 le16_to_cpu(out_cmd->hdr.sequence));
610 IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
611 iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
612 iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
613 ieee80211_hdrlen(fc));
614
615 /*
616 * Use the first empty entry in this queue's command buffer array
617 * to contain the Tx command and MAC header concatenated together
618 * (payload data will be in another buffer).
619 * Size of this varies, due to varying MAC header length.
620 * If end is not dword aligned, we'll have 2 extra bytes at the end
621 * of the MAC header (device reads on dword boundaries).
622 * We'll tell device about this padding later.
623 */
624 len = sizeof(struct iwl3945_tx_cmd) +
625 sizeof(struct iwl_cmd_header) + hdr_len;
626
627 len_org = len;
628 len = (len + 3) & ~3;
629
630 if (len_org != len)
631 len_org = 1;
632 else
633 len_org = 0;
634
635 /* Physical address of this Tx command's header (not MAC header!),
636 * within command buffer array. */
637 txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
638 len, PCI_DMA_TODEVICE);
639 /* we do not map meta data ... so we can safely access address to
640 * provide to unmap command*/
641 pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
642 pci_unmap_len_set(out_meta, len, len);
643
644 /* Add buffer containing Tx command and MAC(!) header to TFD's
645 * first entry */
646 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
647 txcmd_phys, len, 1, 0);
648
649
650 /* Set up TFD's 2nd entry to point directly to remainder of skb,
651 * if any (802.11 null frames have no payload). */
652 len = skb->len - hdr_len;
653 if (len) {
654 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
655 len, PCI_DMA_TODEVICE);
656 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
657 phys_addr, len,
658 0, U32_PAD(len));
659 }
660
661
662 /* Tell device the write index *just past* this latest filled TFD */
663 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
664 rc = iwl_txq_update_write_ptr(priv, txq);
665 spin_unlock_irqrestore(&priv->lock, flags);
666
667 if (rc)
668 return rc;
669
670 if ((iwl_queue_space(q) < q->high_mark)
671 && priv->mac80211_registered) {
672 if (wait_write_ptr) {
673 spin_lock_irqsave(&priv->lock, flags);
674 txq->need_update = 1;
675 iwl_txq_update_write_ptr(priv, txq);
676 spin_unlock_irqrestore(&priv->lock, flags);
677 }
678
679 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
680 }
681
682 return 0;
683
684 drop_unlock:
685 spin_unlock_irqrestore(&priv->lock, flags);
686 drop:
687 return -1;
688 }
689
690 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
691
692 #include "iwl-spectrum.h"
693
694 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
695 #define BEACON_TIME_MASK_HIGH 0xFF000000
696 #define TIME_UNIT 1024
697
698 /*
699 * extended beacon time format
700 * time in usec will be changed into a 32-bit value in 8:24 format
701 * the high 1 byte is the beacon counts
702 * the lower 3 bytes is the time in usec within one beacon interval
703 */
704
705 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
706 {
707 u32 quot;
708 u32 rem;
709 u32 interval = beacon_interval * 1024;
710
711 if (!interval || !usec)
712 return 0;
713
714 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
715 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
716
717 return (quot << 24) + rem;
718 }
719
720 /* base is usually what we get from ucode with each received frame,
721 * the same as HW timer counter counting down
722 */
723
724 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
725 {
726 u32 base_low = base & BEACON_TIME_MASK_LOW;
727 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
728 u32 interval = beacon_interval * TIME_UNIT;
729 u32 res = (base & BEACON_TIME_MASK_HIGH) +
730 (addon & BEACON_TIME_MASK_HIGH);
731
732 if (base_low > addon_low)
733 res += base_low - addon_low;
734 else if (base_low < addon_low) {
735 res += interval + base_low - addon_low;
736 res += (1 << 24);
737 } else
738 res += (1 << 24);
739
740 return cpu_to_le32(res);
741 }
742
743 static int iwl3945_get_measurement(struct iwl_priv *priv,
744 struct ieee80211_measurement_params *params,
745 u8 type)
746 {
747 struct iwl_spectrum_cmd spectrum;
748 struct iwl_rx_packet *pkt;
749 struct iwl_host_cmd cmd = {
750 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
751 .data = (void *)&spectrum,
752 .flags = CMD_WANT_SKB,
753 };
754 u32 add_time = le64_to_cpu(params->start_time);
755 int rc;
756 int spectrum_resp_status;
757 int duration = le16_to_cpu(params->duration);
758
759 if (iwl_is_associated(priv))
760 add_time =
761 iwl3945_usecs_to_beacons(
762 le64_to_cpu(params->start_time) - priv->last_tsf,
763 le16_to_cpu(priv->rxon_timing.beacon_interval));
764
765 memset(&spectrum, 0, sizeof(spectrum));
766
767 spectrum.channel_count = cpu_to_le16(1);
768 spectrum.flags =
769 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
770 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
771 cmd.len = sizeof(spectrum);
772 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
773
774 if (iwl_is_associated(priv))
775 spectrum.start_time =
776 iwl3945_add_beacon_time(priv->last_beacon_time,
777 add_time,
778 le16_to_cpu(priv->rxon_timing.beacon_interval));
779 else
780 spectrum.start_time = 0;
781
782 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
783 spectrum.channels[0].channel = params->channel;
784 spectrum.channels[0].type = type;
785 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
786 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
787 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
788
789 rc = iwl_send_cmd_sync(priv, &cmd);
790 if (rc)
791 return rc;
792
793 pkt = (struct iwl_rx_packet *)cmd.reply_page;
794 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
795 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
796 rc = -EIO;
797 }
798
799 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
800 switch (spectrum_resp_status) {
801 case 0: /* Command will be handled */
802 if (pkt->u.spectrum.id != 0xff) {
803 IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
804 pkt->u.spectrum.id);
805 priv->measurement_status &= ~MEASUREMENT_READY;
806 }
807 priv->measurement_status |= MEASUREMENT_ACTIVE;
808 rc = 0;
809 break;
810
811 case 1: /* Command will not be handled */
812 rc = -EAGAIN;
813 break;
814 }
815
816 free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
817
818 return rc;
819 }
820 #endif
821
822 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
823 struct iwl_rx_mem_buffer *rxb)
824 {
825 struct iwl_rx_packet *pkt = rxb_addr(rxb);
826 struct iwl_alive_resp *palive;
827 struct delayed_work *pwork;
828
829 palive = &pkt->u.alive_frame;
830
831 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
832 "0x%01X 0x%01X\n",
833 palive->is_valid, palive->ver_type,
834 palive->ver_subtype);
835
836 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
837 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
838 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
839 sizeof(struct iwl_alive_resp));
840 pwork = &priv->init_alive_start;
841 } else {
842 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
843 memcpy(&priv->card_alive, &pkt->u.alive_frame,
844 sizeof(struct iwl_alive_resp));
845 pwork = &priv->alive_start;
846 iwl3945_disable_events(priv);
847 }
848
849 /* We delay the ALIVE response by 5ms to
850 * give the HW RF Kill time to activate... */
851 if (palive->is_valid == UCODE_VALID_OK)
852 queue_delayed_work(priv->workqueue, pwork,
853 msecs_to_jiffies(5));
854 else
855 IWL_WARN(priv, "uCode did not respond OK.\n");
856 }
857
858 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
859 struct iwl_rx_mem_buffer *rxb)
860 {
861 #ifdef CONFIG_IWLWIFI_DEBUG
862 struct iwl_rx_packet *pkt = rxb_addr(rxb);
863 #endif
864
865 IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
866 return;
867 }
868
869 static void iwl3945_bg_beacon_update(struct work_struct *work)
870 {
871 struct iwl_priv *priv =
872 container_of(work, struct iwl_priv, beacon_update);
873 struct sk_buff *beacon;
874
875 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
876 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
877
878 if (!beacon) {
879 IWL_ERR(priv, "update beacon failed\n");
880 return;
881 }
882
883 mutex_lock(&priv->mutex);
884 /* new beacon skb is allocated every time; dispose previous.*/
885 if (priv->ibss_beacon)
886 dev_kfree_skb(priv->ibss_beacon);
887
888 priv->ibss_beacon = beacon;
889 mutex_unlock(&priv->mutex);
890
891 iwl3945_send_beacon_cmd(priv);
892 }
893
894 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
895 struct iwl_rx_mem_buffer *rxb)
896 {
897 #ifdef CONFIG_IWLWIFI_DEBUG
898 struct iwl_rx_packet *pkt = rxb_addr(rxb);
899 struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
900 u8 rate = beacon->beacon_notify_hdr.rate;
901
902 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
903 "tsf %d %d rate %d\n",
904 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
905 beacon->beacon_notify_hdr.failure_frame,
906 le32_to_cpu(beacon->ibss_mgr_status),
907 le32_to_cpu(beacon->high_tsf),
908 le32_to_cpu(beacon->low_tsf), rate);
909 #endif
910
911 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
912 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
913 queue_work(priv->workqueue, &priv->beacon_update);
914 }
915
916 /* Handle notification from uCode that card's power state is changing
917 * due to software, hardware, or critical temperature RFKILL */
918 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
919 struct iwl_rx_mem_buffer *rxb)
920 {
921 struct iwl_rx_packet *pkt = rxb_addr(rxb);
922 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
923 unsigned long status = priv->status;
924
925 IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
926 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
927 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
928
929 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
930 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
931
932 if (flags & HW_CARD_DISABLED)
933 set_bit(STATUS_RF_KILL_HW, &priv->status);
934 else
935 clear_bit(STATUS_RF_KILL_HW, &priv->status);
936
937
938 iwl_scan_cancel(priv);
939
940 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
941 test_bit(STATUS_RF_KILL_HW, &priv->status)))
942 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
943 test_bit(STATUS_RF_KILL_HW, &priv->status));
944 else
945 wake_up_interruptible(&priv->wait_command_queue);
946 }
947
948 /**
949 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
950 *
951 * Setup the RX handlers for each of the reply types sent from the uCode
952 * to the host.
953 *
954 * This function chains into the hardware specific files for them to setup
955 * any hardware specific handlers as well.
956 */
957 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
958 {
959 priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
960 priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
961 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
962 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
963 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
964 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
965 iwl_rx_pm_debug_statistics_notif;
966 priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
967
968 /*
969 * The same handler is used for both the REPLY to a discrete
970 * statistics request from the host as well as for the periodic
971 * statistics notifications (after received beacons) from the uCode.
972 */
973 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
974 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
975
976 iwl_setup_spectrum_handlers(priv);
977 iwl_setup_rx_scan_handlers(priv);
978 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
979
980 /* Set up hardware specific Rx handlers */
981 iwl3945_hw_rx_handler_setup(priv);
982 }
983
984 /************************** RX-FUNCTIONS ****************************/
985 /*
986 * Rx theory of operation
987 *
988 * The host allocates 32 DMA target addresses and passes the host address
989 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
990 * 0 to 31
991 *
992 * Rx Queue Indexes
993 * The host/firmware share two index registers for managing the Rx buffers.
994 *
995 * The READ index maps to the first position that the firmware may be writing
996 * to -- the driver can read up to (but not including) this position and get
997 * good data.
998 * The READ index is managed by the firmware once the card is enabled.
999 *
1000 * The WRITE index maps to the last position the driver has read from -- the
1001 * position preceding WRITE is the last slot the firmware can place a packet.
1002 *
1003 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1004 * WRITE = READ.
1005 *
1006 * During initialization, the host sets up the READ queue position to the first
1007 * INDEX position, and WRITE to the last (READ - 1 wrapped)
1008 *
1009 * When the firmware places a packet in a buffer, it will advance the READ index
1010 * and fire the RX interrupt. The driver can then query the READ index and
1011 * process as many packets as possible, moving the WRITE index forward as it
1012 * resets the Rx queue buffers with new memory.
1013 *
1014 * The management in the driver is as follows:
1015 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
1016 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1017 * to replenish the iwl->rxq->rx_free.
1018 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1019 * iwl->rxq is replenished and the READ INDEX is updated (updating the
1020 * 'processed' and 'read' driver indexes as well)
1021 * + A received packet is processed and handed to the kernel network stack,
1022 * detached from the iwl->rxq. The driver 'processed' index is updated.
1023 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1024 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1025 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
1026 * were enough free buffers and RX_STALLED is set it is cleared.
1027 *
1028 *
1029 * Driver sequence:
1030 *
1031 * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
1032 * iwl3945_rx_queue_restock
1033 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1034 * queue, updates firmware pointers, and updates
1035 * the WRITE index. If insufficient rx_free buffers
1036 * are available, schedules iwl3945_rx_replenish
1037 *
1038 * -- enable interrupts --
1039 * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
1040 * READ INDEX, detaching the SKB from the pool.
1041 * Moves the packet buffer from queue to rx_used.
1042 * Calls iwl3945_rx_queue_restock to refill any empty
1043 * slots.
1044 * ...
1045 *
1046 */
1047
1048 /**
1049 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1050 */
1051 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1052 dma_addr_t dma_addr)
1053 {
1054 return cpu_to_le32((u32)dma_addr);
1055 }
1056
1057 /**
1058 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1059 *
1060 * If there are slots in the RX queue that need to be restocked,
1061 * and we have free pre-allocated buffers, fill the ranks as much
1062 * as we can, pulling from rx_free.
1063 *
1064 * This moves the 'write' index forward to catch up with 'processed', and
1065 * also updates the memory address in the firmware to reference the new
1066 * target buffer.
1067 */
1068 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1069 {
1070 struct iwl_rx_queue *rxq = &priv->rxq;
1071 struct list_head *element;
1072 struct iwl_rx_mem_buffer *rxb;
1073 unsigned long flags;
1074 int write, rc;
1075
1076 spin_lock_irqsave(&rxq->lock, flags);
1077 write = rxq->write & ~0x7;
1078 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1079 /* Get next free Rx buffer, remove from free list */
1080 element = rxq->rx_free.next;
1081 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1082 list_del(element);
1083
1084 /* Point to Rx buffer via next RBD in circular buffer */
1085 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1086 rxq->queue[rxq->write] = rxb;
1087 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1088 rxq->free_count--;
1089 }
1090 spin_unlock_irqrestore(&rxq->lock, flags);
1091 /* If the pre-allocated buffer pool is dropping low, schedule to
1092 * refill it */
1093 if (rxq->free_count <= RX_LOW_WATERMARK)
1094 queue_work(priv->workqueue, &priv->rx_replenish);
1095
1096
1097 /* If we've added more space for the firmware to place data, tell it.
1098 * Increment device's write pointer in multiples of 8. */
1099 if ((rxq->write_actual != (rxq->write & ~0x7))
1100 || (abs(rxq->write - rxq->read) > 7)) {
1101 spin_lock_irqsave(&rxq->lock, flags);
1102 rxq->need_update = 1;
1103 spin_unlock_irqrestore(&rxq->lock, flags);
1104 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1105 if (rc)
1106 return rc;
1107 }
1108
1109 return 0;
1110 }
1111
1112 /**
1113 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1114 *
1115 * When moving to rx_free an SKB is allocated for the slot.
1116 *
1117 * Also restock the Rx queue via iwl3945_rx_queue_restock.
1118 * This is called as a scheduled work item (except for during initialization)
1119 */
1120 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1121 {
1122 struct iwl_rx_queue *rxq = &priv->rxq;
1123 struct list_head *element;
1124 struct iwl_rx_mem_buffer *rxb;
1125 struct page *page;
1126 unsigned long flags;
1127 gfp_t gfp_mask = priority;
1128
1129 while (1) {
1130 spin_lock_irqsave(&rxq->lock, flags);
1131
1132 if (list_empty(&rxq->rx_used)) {
1133 spin_unlock_irqrestore(&rxq->lock, flags);
1134 return;
1135 }
1136 spin_unlock_irqrestore(&rxq->lock, flags);
1137
1138 if (rxq->free_count > RX_LOW_WATERMARK)
1139 gfp_mask |= __GFP_NOWARN;
1140
1141 if (priv->hw_params.rx_page_order > 0)
1142 gfp_mask |= __GFP_COMP;
1143
1144 /* Alloc a new receive buffer */
1145 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1146 if (!page) {
1147 if (net_ratelimit())
1148 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1149 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1150 net_ratelimit())
1151 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1152 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
1153 rxq->free_count);
1154 /* We don't reschedule replenish work here -- we will
1155 * call the restock method and if it still needs
1156 * more buffers it will schedule replenish */
1157 break;
1158 }
1159
1160 spin_lock_irqsave(&rxq->lock, flags);
1161 if (list_empty(&rxq->rx_used)) {
1162 spin_unlock_irqrestore(&rxq->lock, flags);
1163 __free_pages(page, priv->hw_params.rx_page_order);
1164 return;
1165 }
1166 element = rxq->rx_used.next;
1167 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1168 list_del(element);
1169 spin_unlock_irqrestore(&rxq->lock, flags);
1170
1171 rxb->page = page;
1172 /* Get physical address of RB/SKB */
1173 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1174 PAGE_SIZE << priv->hw_params.rx_page_order,
1175 PCI_DMA_FROMDEVICE);
1176
1177 spin_lock_irqsave(&rxq->lock, flags);
1178
1179 list_add_tail(&rxb->list, &rxq->rx_free);
1180 rxq->free_count++;
1181 priv->alloc_rxb_page++;
1182
1183 spin_unlock_irqrestore(&rxq->lock, flags);
1184 }
1185 }
1186
1187 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1188 {
1189 unsigned long flags;
1190 int i;
1191 spin_lock_irqsave(&rxq->lock, flags);
1192 INIT_LIST_HEAD(&rxq->rx_free);
1193 INIT_LIST_HEAD(&rxq->rx_used);
1194 /* Fill the rx_used queue with _all_ of the Rx buffers */
1195 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1196 /* In the reset function, these buffers may have been allocated
1197 * to an SKB, so we need to unmap and free potential storage */
1198 if (rxq->pool[i].page != NULL) {
1199 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1200 PAGE_SIZE << priv->hw_params.rx_page_order,
1201 PCI_DMA_FROMDEVICE);
1202 priv->alloc_rxb_page--;
1203 __free_pages(rxq->pool[i].page,
1204 priv->hw_params.rx_page_order);
1205 rxq->pool[i].page = NULL;
1206 }
1207 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1208 }
1209
1210 /* Set us so that we have processed and used all buffers, but have
1211 * not restocked the Rx queue with fresh buffers */
1212 rxq->read = rxq->write = 0;
1213 rxq->write_actual = 0;
1214 rxq->free_count = 0;
1215 spin_unlock_irqrestore(&rxq->lock, flags);
1216 }
1217
1218 void iwl3945_rx_replenish(void *data)
1219 {
1220 struct iwl_priv *priv = data;
1221 unsigned long flags;
1222
1223 iwl3945_rx_allocate(priv, GFP_KERNEL);
1224
1225 spin_lock_irqsave(&priv->lock, flags);
1226 iwl3945_rx_queue_restock(priv);
1227 spin_unlock_irqrestore(&priv->lock, flags);
1228 }
1229
1230 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1231 {
1232 iwl3945_rx_allocate(priv, GFP_ATOMIC);
1233
1234 iwl3945_rx_queue_restock(priv);
1235 }
1236
1237
1238 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1239 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1240 * This free routine walks the list of POOL entries and if SKB is set to
1241 * non NULL it is unmapped and freed
1242 */
1243 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1244 {
1245 int i;
1246 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1247 if (rxq->pool[i].page != NULL) {
1248 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1249 PAGE_SIZE << priv->hw_params.rx_page_order,
1250 PCI_DMA_FROMDEVICE);
1251 __free_pages(rxq->pool[i].page,
1252 priv->hw_params.rx_page_order);
1253 rxq->pool[i].page = NULL;
1254 priv->alloc_rxb_page--;
1255 }
1256 }
1257
1258 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1259 rxq->dma_addr);
1260 pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1261 rxq->rb_stts, rxq->rb_stts_dma);
1262 rxq->bd = NULL;
1263 rxq->rb_stts = NULL;
1264 }
1265
1266
1267 /* Convert linear signal-to-noise ratio into dB */
1268 static u8 ratio2dB[100] = {
1269 /* 0 1 2 3 4 5 6 7 8 9 */
1270 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1271 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1272 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1273 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1274 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1275 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1276 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1277 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1278 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1279 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1280 };
1281
1282 /* Calculates a relative dB value from a ratio of linear
1283 * (i.e. not dB) signal levels.
1284 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1285 int iwl3945_calc_db_from_ratio(int sig_ratio)
1286 {
1287 /* 1000:1 or higher just report as 60 dB */
1288 if (sig_ratio >= 1000)
1289 return 60;
1290
1291 /* 100:1 or higher, divide by 10 and use table,
1292 * add 20 dB to make up for divide by 10 */
1293 if (sig_ratio >= 100)
1294 return 20 + (int)ratio2dB[sig_ratio/10];
1295
1296 /* We shouldn't see this */
1297 if (sig_ratio < 1)
1298 return 0;
1299
1300 /* Use table for ratios 1:1 - 99:1 */
1301 return (int)ratio2dB[sig_ratio];
1302 }
1303
1304 #define PERFECT_RSSI (-20) /* dBm */
1305 #define WORST_RSSI (-95) /* dBm */
1306 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1307
1308 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1309 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1310 * about formulas used below. */
1311 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1312 {
1313 int sig_qual;
1314 int degradation = PERFECT_RSSI - rssi_dbm;
1315
1316 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1317 * as indicator; formula is (signal dbm - noise dbm).
1318 * SNR at or above 40 is a great signal (100%).
1319 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1320 * Weakest usable signal is usually 10 - 15 dB SNR. */
1321 if (noise_dbm) {
1322 if (rssi_dbm - noise_dbm >= 40)
1323 return 100;
1324 else if (rssi_dbm < noise_dbm)
1325 return 0;
1326 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1327
1328 /* Else use just the signal level.
1329 * This formula is a least squares fit of data points collected and
1330 * compared with a reference system that had a percentage (%) display
1331 * for signal quality. */
1332 } else
1333 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1334 (15 * RSSI_RANGE + 62 * degradation)) /
1335 (RSSI_RANGE * RSSI_RANGE);
1336
1337 if (sig_qual > 100)
1338 sig_qual = 100;
1339 else if (sig_qual < 1)
1340 sig_qual = 0;
1341
1342 return sig_qual;
1343 }
1344
1345 /**
1346 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1347 *
1348 * Uses the priv->rx_handlers callback function array to invoke
1349 * the appropriate handlers, including command responses,
1350 * frame-received notifications, and other notifications.
1351 */
1352 static void iwl3945_rx_handle(struct iwl_priv *priv)
1353 {
1354 struct iwl_rx_mem_buffer *rxb;
1355 struct iwl_rx_packet *pkt;
1356 struct iwl_rx_queue *rxq = &priv->rxq;
1357 u32 r, i;
1358 int reclaim;
1359 unsigned long flags;
1360 u8 fill_rx = 0;
1361 u32 count = 8;
1362 int total_empty = 0;
1363
1364 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1365 * buffer that the driver may process (last buffer filled by ucode). */
1366 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1367 i = rxq->read;
1368
1369 /* calculate total frames need to be restock after handling RX */
1370 total_empty = r - rxq->write_actual;
1371 if (total_empty < 0)
1372 total_empty += RX_QUEUE_SIZE;
1373
1374 if (total_empty > (RX_QUEUE_SIZE / 2))
1375 fill_rx = 1;
1376 /* Rx interrupt, but nothing sent from uCode */
1377 if (i == r)
1378 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1379
1380 while (i != r) {
1381 rxb = rxq->queue[i];
1382
1383 /* If an RXB doesn't have a Rx queue slot associated with it,
1384 * then a bug has been introduced in the queue refilling
1385 * routines -- catch it here */
1386 BUG_ON(rxb == NULL);
1387
1388 rxq->queue[i] = NULL;
1389
1390 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1391 PAGE_SIZE << priv->hw_params.rx_page_order,
1392 PCI_DMA_FROMDEVICE);
1393 pkt = rxb_addr(rxb);
1394
1395 trace_iwlwifi_dev_rx(priv, pkt,
1396 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1397
1398 /* Reclaim a command buffer only if this packet is a response
1399 * to a (driver-originated) command.
1400 * If the packet (e.g. Rx frame) originated from uCode,
1401 * there is no command buffer to reclaim.
1402 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1403 * but apparently a few don't get set; catch them here. */
1404 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1405 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1406 (pkt->hdr.cmd != REPLY_TX);
1407
1408 /* Based on type of command response or notification,
1409 * handle those that need handling via function in
1410 * rx_handlers table. See iwl3945_setup_rx_handlers() */
1411 if (priv->rx_handlers[pkt->hdr.cmd]) {
1412 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1413 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1414 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1415 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1416 } else {
1417 /* No handling needed */
1418 IWL_DEBUG_RX(priv,
1419 "r %d i %d No handler needed for %s, 0x%02x\n",
1420 r, i, get_cmd_string(pkt->hdr.cmd),
1421 pkt->hdr.cmd);
1422 }
1423
1424 /*
1425 * XXX: After here, we should always check rxb->page
1426 * against NULL before touching it or its virtual
1427 * memory (pkt). Because some rx_handler might have
1428 * already taken or freed the pages.
1429 */
1430
1431 if (reclaim) {
1432 /* Invoke any callbacks, transfer the buffer to caller,
1433 * and fire off the (possibly) blocking iwl_send_cmd()
1434 * as we reclaim the driver command queue */
1435 if (rxb->page)
1436 iwl_tx_cmd_complete(priv, rxb);
1437 else
1438 IWL_WARN(priv, "Claim null rxb?\n");
1439 }
1440
1441 /* Reuse the page if possible. For notification packets and
1442 * SKBs that fail to Rx correctly, add them back into the
1443 * rx_free list for reuse later. */
1444 spin_lock_irqsave(&rxq->lock, flags);
1445 if (rxb->page != NULL) {
1446 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1447 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1448 PCI_DMA_FROMDEVICE);
1449 list_add_tail(&rxb->list, &rxq->rx_free);
1450 rxq->free_count++;
1451 } else
1452 list_add_tail(&rxb->list, &rxq->rx_used);
1453
1454 spin_unlock_irqrestore(&rxq->lock, flags);
1455
1456 i = (i + 1) & RX_QUEUE_MASK;
1457 /* If there are a lot of unused frames,
1458 * restock the Rx queue so ucode won't assert. */
1459 if (fill_rx) {
1460 count++;
1461 if (count >= 8) {
1462 rxq->read = i;
1463 iwl3945_rx_replenish_now(priv);
1464 count = 0;
1465 }
1466 }
1467 }
1468
1469 /* Backtrack one entry */
1470 rxq->read = i;
1471 if (fill_rx)
1472 iwl3945_rx_replenish_now(priv);
1473 else
1474 iwl3945_rx_queue_restock(priv);
1475 }
1476
1477 /* call this function to flush any scheduled tasklet */
1478 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1479 {
1480 /* wait to make sure we flush pending tasklet*/
1481 synchronize_irq(priv->pci_dev->irq);
1482 tasklet_kill(&priv->irq_tasklet);
1483 }
1484
1485 #ifdef CONFIG_IWLWIFI_DEBUG
1486 static const char *desc_lookup(int i)
1487 {
1488 switch (i) {
1489 case 1:
1490 return "FAIL";
1491 case 2:
1492 return "BAD_PARAM";
1493 case 3:
1494 return "BAD_CHECKSUM";
1495 case 4:
1496 return "NMI_INTERRUPT";
1497 case 5:
1498 return "SYSASSERT";
1499 case 6:
1500 return "FATAL_ERROR";
1501 }
1502
1503 return "UNKNOWN";
1504 }
1505
1506 #define ERROR_START_OFFSET (1 * sizeof(u32))
1507 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1508
1509 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1510 {
1511 u32 i;
1512 u32 desc, time, count, base, data1;
1513 u32 blink1, blink2, ilink1, ilink2;
1514
1515 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1516
1517 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1518 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1519 return;
1520 }
1521
1522
1523 count = iwl_read_targ_mem(priv, base);
1524
1525 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1526 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1527 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1528 priv->status, count);
1529 }
1530
1531 IWL_ERR(priv, "Desc Time asrtPC blink2 "
1532 "ilink1 nmiPC Line\n");
1533 for (i = ERROR_START_OFFSET;
1534 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1535 i += ERROR_ELEM_SIZE) {
1536 desc = iwl_read_targ_mem(priv, base + i);
1537 time =
1538 iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1539 blink1 =
1540 iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1541 blink2 =
1542 iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1543 ilink1 =
1544 iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1545 ilink2 =
1546 iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1547 data1 =
1548 iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1549
1550 IWL_ERR(priv,
1551 "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1552 desc_lookup(desc), desc, time, blink1, blink2,
1553 ilink1, ilink2, data1);
1554 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1555 0, blink1, blink2, ilink1, ilink2);
1556 }
1557 }
1558
1559 #define EVENT_START_OFFSET (6 * sizeof(u32))
1560
1561 /**
1562 * iwl3945_print_event_log - Dump error event log to syslog
1563 *
1564 */
1565 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1566 u32 num_events, u32 mode)
1567 {
1568 u32 i;
1569 u32 base; /* SRAM byte address of event log header */
1570 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1571 u32 ptr; /* SRAM byte address of log data */
1572 u32 ev, time, data; /* event log data */
1573 unsigned long reg_flags;
1574
1575 if (num_events == 0)
1576 return;
1577
1578 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1579
1580 if (mode == 0)
1581 event_size = 2 * sizeof(u32);
1582 else
1583 event_size = 3 * sizeof(u32);
1584
1585 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1586
1587 /* Make sure device is powered up for SRAM reads */
1588 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1589 iwl_grab_nic_access(priv);
1590
1591 /* Set starting address; reads will auto-increment */
1592 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1593 rmb();
1594
1595 /* "time" is actually "data" for mode 0 (no timestamp).
1596 * place event id # at far right for easier visual parsing. */
1597 for (i = 0; i < num_events; i++) {
1598 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1599 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1600 if (mode == 0) {
1601 /* data, ev */
1602 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1603 trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1604 } else {
1605 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1606 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1607 trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1608 }
1609 }
1610
1611 /* Allow device to power down */
1612 iwl_release_nic_access(priv);
1613 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1614 }
1615
1616 /* For sanity check only. Actual size is determined by uCode, typ. 512 */
1617 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1618
1619 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1620 {
1621 u32 base; /* SRAM byte address of event log header */
1622 u32 capacity; /* event log capacity in # entries */
1623 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1624 u32 num_wraps; /* # times uCode wrapped to top of log */
1625 u32 next_entry; /* index of next entry to be written by uCode */
1626 u32 size; /* # entries that we'll print */
1627
1628 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1629 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1630 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1631 return;
1632 }
1633
1634 /* event log header */
1635 capacity = iwl_read_targ_mem(priv, base);
1636 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1637 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1638 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1639
1640 if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1641 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1642 capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1643 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1644 }
1645
1646 if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1647 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1648 next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1649 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1650 }
1651
1652 size = num_wraps ? capacity : next_entry;
1653
1654 /* bail out if nothing in log */
1655 if (size == 0) {
1656 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1657 return;
1658 }
1659
1660 IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1661 size, num_wraps);
1662
1663 /* if uCode has wrapped back to top of log, start at the oldest entry,
1664 * i.e the next one that uCode would fill. */
1665 if (num_wraps)
1666 iwl3945_print_event_log(priv, next_entry,
1667 capacity - next_entry, mode);
1668
1669 /* (then/else) start at top of log */
1670 iwl3945_print_event_log(priv, 0, next_entry, mode);
1671
1672 }
1673 #else
1674 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1675 {
1676 }
1677
1678 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1679 {
1680 }
1681
1682 #endif
1683
1684 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1685 {
1686 u32 inta, handled = 0;
1687 u32 inta_fh;
1688 unsigned long flags;
1689 #ifdef CONFIG_IWLWIFI_DEBUG
1690 u32 inta_mask;
1691 #endif
1692
1693 spin_lock_irqsave(&priv->lock, flags);
1694
1695 /* Ack/clear/reset pending uCode interrupts.
1696 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1697 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1698 inta = iwl_read32(priv, CSR_INT);
1699 iwl_write32(priv, CSR_INT, inta);
1700
1701 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1702 * Any new interrupts that happen after this, either while we're
1703 * in this tasklet, or later, will show up in next ISR/tasklet. */
1704 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1705 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1706
1707 #ifdef CONFIG_IWLWIFI_DEBUG
1708 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1709 /* just for debug */
1710 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1711 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1712 inta, inta_mask, inta_fh);
1713 }
1714 #endif
1715
1716 spin_unlock_irqrestore(&priv->lock, flags);
1717
1718 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1719 * atomic, make sure that inta covers all the interrupts that
1720 * we've discovered, even if FH interrupt came in just after
1721 * reading CSR_INT. */
1722 if (inta_fh & CSR39_FH_INT_RX_MASK)
1723 inta |= CSR_INT_BIT_FH_RX;
1724 if (inta_fh & CSR39_FH_INT_TX_MASK)
1725 inta |= CSR_INT_BIT_FH_TX;
1726
1727 /* Now service all interrupt bits discovered above. */
1728 if (inta & CSR_INT_BIT_HW_ERR) {
1729 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1730
1731 /* Tell the device to stop sending interrupts */
1732 iwl_disable_interrupts(priv);
1733
1734 priv->isr_stats.hw++;
1735 iwl_irq_handle_error(priv);
1736
1737 handled |= CSR_INT_BIT_HW_ERR;
1738
1739 return;
1740 }
1741
1742 #ifdef CONFIG_IWLWIFI_DEBUG
1743 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1744 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1745 if (inta & CSR_INT_BIT_SCD) {
1746 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1747 "the frame/frames.\n");
1748 priv->isr_stats.sch++;
1749 }
1750
1751 /* Alive notification via Rx interrupt will do the real work */
1752 if (inta & CSR_INT_BIT_ALIVE) {
1753 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1754 priv->isr_stats.alive++;
1755 }
1756 }
1757 #endif
1758 /* Safely ignore these bits for debug checks below */
1759 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1760
1761 /* Error detected by uCode */
1762 if (inta & CSR_INT_BIT_SW_ERR) {
1763 IWL_ERR(priv, "Microcode SW error detected. "
1764 "Restarting 0x%X.\n", inta);
1765 priv->isr_stats.sw++;
1766 priv->isr_stats.sw_err = inta;
1767 iwl_irq_handle_error(priv);
1768 handled |= CSR_INT_BIT_SW_ERR;
1769 }
1770
1771 /* uCode wakes up after power-down sleep */
1772 if (inta & CSR_INT_BIT_WAKEUP) {
1773 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1774 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1775 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1776 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1777 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1778 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1779 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1780 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1781
1782 priv->isr_stats.wakeup++;
1783 handled |= CSR_INT_BIT_WAKEUP;
1784 }
1785
1786 /* All uCode command responses, including Tx command responses,
1787 * Rx "responses" (frame-received notification), and other
1788 * notifications from uCode come through here*/
1789 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1790 iwl3945_rx_handle(priv);
1791 priv->isr_stats.rx++;
1792 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1793 }
1794
1795 if (inta & CSR_INT_BIT_FH_TX) {
1796 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1797 priv->isr_stats.tx++;
1798
1799 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1800 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1801 (FH39_SRVC_CHNL), 0x0);
1802 handled |= CSR_INT_BIT_FH_TX;
1803 }
1804
1805 if (inta & ~handled) {
1806 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1807 priv->isr_stats.unhandled++;
1808 }
1809
1810 if (inta & ~priv->inta_mask) {
1811 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1812 inta & ~priv->inta_mask);
1813 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1814 }
1815
1816 /* Re-enable all interrupts */
1817 /* only Re-enable if disabled by irq */
1818 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1819 iwl_enable_interrupts(priv);
1820
1821 #ifdef CONFIG_IWLWIFI_DEBUG
1822 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1823 inta = iwl_read32(priv, CSR_INT);
1824 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1825 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1826 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1827 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1828 }
1829 #endif
1830 }
1831
1832 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1833 enum ieee80211_band band,
1834 u8 is_active, u8 n_probes,
1835 struct iwl3945_scan_channel *scan_ch)
1836 {
1837 struct ieee80211_channel *chan;
1838 const struct ieee80211_supported_band *sband;
1839 const struct iwl_channel_info *ch_info;
1840 u16 passive_dwell = 0;
1841 u16 active_dwell = 0;
1842 int added, i;
1843
1844 sband = iwl_get_hw_mode(priv, band);
1845 if (!sband)
1846 return 0;
1847
1848 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1849 passive_dwell = iwl_get_passive_dwell_time(priv, band);
1850
1851 if (passive_dwell <= active_dwell)
1852 passive_dwell = active_dwell + 1;
1853
1854 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1855 chan = priv->scan_request->channels[i];
1856
1857 if (chan->band != band)
1858 continue;
1859
1860 scan_ch->channel = chan->hw_value;
1861
1862 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1863 if (!is_channel_valid(ch_info)) {
1864 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1865 scan_ch->channel);
1866 continue;
1867 }
1868
1869 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1870 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1871 /* If passive , set up for auto-switch
1872 * and use long active_dwell time.
1873 */
1874 if (!is_active || is_channel_passive(ch_info) ||
1875 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1876 scan_ch->type = 0; /* passive */
1877 if (IWL_UCODE_API(priv->ucode_ver) == 1)
1878 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1879 } else {
1880 scan_ch->type = 1; /* active */
1881 }
1882
1883 /* Set direct probe bits. These may be used both for active
1884 * scan channels (probes gets sent right away),
1885 * or for passive channels (probes get se sent only after
1886 * hearing clear Rx packet).*/
1887 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1888 if (n_probes)
1889 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1890 } else {
1891 /* uCode v1 does not allow setting direct probe bits on
1892 * passive channel. */
1893 if ((scan_ch->type & 1) && n_probes)
1894 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1895 }
1896
1897 /* Set txpower levels to defaults */
1898 scan_ch->tpc.dsp_atten = 110;
1899 /* scan_pwr_info->tpc.dsp_atten; */
1900
1901 /*scan_pwr_info->tpc.tx_gain; */
1902 if (band == IEEE80211_BAND_5GHZ)
1903 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1904 else {
1905 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1906 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1907 * power level:
1908 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1909 */
1910 }
1911
1912 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1913 scan_ch->channel,
1914 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1915 (scan_ch->type & 1) ?
1916 active_dwell : passive_dwell);
1917
1918 scan_ch++;
1919 added++;
1920 }
1921
1922 IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1923 return added;
1924 }
1925
1926 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1927 struct ieee80211_rate *rates)
1928 {
1929 int i;
1930
1931 for (i = 0; i < IWL_RATE_COUNT; i++) {
1932 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1933 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1934 rates[i].hw_value_short = i;
1935 rates[i].flags = 0;
1936 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1937 /*
1938 * If CCK != 1M then set short preamble rate flag.
1939 */
1940 rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1941 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1942 }
1943 }
1944 }
1945
1946 /******************************************************************************
1947 *
1948 * uCode download functions
1949 *
1950 ******************************************************************************/
1951
1952 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1953 {
1954 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1955 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1956 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1957 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1958 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1959 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1960 }
1961
1962 /**
1963 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1964 * looking at all data.
1965 */
1966 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1967 {
1968 u32 val;
1969 u32 save_len = len;
1970 int rc = 0;
1971 u32 errcnt;
1972
1973 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1974
1975 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1976 IWL39_RTC_INST_LOWER_BOUND);
1977
1978 errcnt = 0;
1979 for (; len > 0; len -= sizeof(u32), image++) {
1980 /* read data comes through single port, auto-incr addr */
1981 /* NOTE: Use the debugless read so we don't flood kernel log
1982 * if IWL_DL_IO is set */
1983 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1984 if (val != le32_to_cpu(*image)) {
1985 IWL_ERR(priv, "uCode INST section is invalid at "
1986 "offset 0x%x, is 0x%x, s/b 0x%x\n",
1987 save_len - len, val, le32_to_cpu(*image));
1988 rc = -EIO;
1989 errcnt++;
1990 if (errcnt >= 20)
1991 break;
1992 }
1993 }
1994
1995
1996 if (!errcnt)
1997 IWL_DEBUG_INFO(priv,
1998 "ucode image in INSTRUCTION memory is good\n");
1999
2000 return rc;
2001 }
2002
2003
2004 /**
2005 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2006 * using sample data 100 bytes apart. If these sample points are good,
2007 * it's a pretty good bet that everything between them is good, too.
2008 */
2009 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2010 {
2011 u32 val;
2012 int rc = 0;
2013 u32 errcnt = 0;
2014 u32 i;
2015
2016 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2017
2018 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2019 /* read data comes through single port, auto-incr addr */
2020 /* NOTE: Use the debugless read so we don't flood kernel log
2021 * if IWL_DL_IO is set */
2022 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2023 i + IWL39_RTC_INST_LOWER_BOUND);
2024 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2025 if (val != le32_to_cpu(*image)) {
2026 #if 0 /* Enable this if you want to see details */
2027 IWL_ERR(priv, "uCode INST section is invalid at "
2028 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2029 i, val, *image);
2030 #endif
2031 rc = -EIO;
2032 errcnt++;
2033 if (errcnt >= 3)
2034 break;
2035 }
2036 }
2037
2038 return rc;
2039 }
2040
2041
2042 /**
2043 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2044 * and verify its contents
2045 */
2046 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2047 {
2048 __le32 *image;
2049 u32 len;
2050 int rc = 0;
2051
2052 /* Try bootstrap */
2053 image = (__le32 *)priv->ucode_boot.v_addr;
2054 len = priv->ucode_boot.len;
2055 rc = iwl3945_verify_inst_sparse(priv, image, len);
2056 if (rc == 0) {
2057 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2058 return 0;
2059 }
2060
2061 /* Try initialize */
2062 image = (__le32 *)priv->ucode_init.v_addr;
2063 len = priv->ucode_init.len;
2064 rc = iwl3945_verify_inst_sparse(priv, image, len);
2065 if (rc == 0) {
2066 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2067 return 0;
2068 }
2069
2070 /* Try runtime/protocol */
2071 image = (__le32 *)priv->ucode_code.v_addr;
2072 len = priv->ucode_code.len;
2073 rc = iwl3945_verify_inst_sparse(priv, image, len);
2074 if (rc == 0) {
2075 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2076 return 0;
2077 }
2078
2079 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2080
2081 /* Since nothing seems to match, show first several data entries in
2082 * instruction SRAM, so maybe visual inspection will give a clue.
2083 * Selection of bootstrap image (vs. other images) is arbitrary. */
2084 image = (__le32 *)priv->ucode_boot.v_addr;
2085 len = priv->ucode_boot.len;
2086 rc = iwl3945_verify_inst_full(priv, image, len);
2087
2088 return rc;
2089 }
2090
2091 static void iwl3945_nic_start(struct iwl_priv *priv)
2092 {
2093 /* Remove all resets to allow NIC to operate */
2094 iwl_write32(priv, CSR_RESET, 0);
2095 }
2096
2097 /**
2098 * iwl3945_read_ucode - Read uCode images from disk file.
2099 *
2100 * Copy into buffers for card to fetch via bus-mastering
2101 */
2102 static int iwl3945_read_ucode(struct iwl_priv *priv)
2103 {
2104 const struct iwl_ucode_header *ucode;
2105 int ret = -EINVAL, index;
2106 const struct firmware *ucode_raw;
2107 /* firmware file name contains uCode/driver compatibility version */
2108 const char *name_pre = priv->cfg->fw_name_pre;
2109 const unsigned int api_max = priv->cfg->ucode_api_max;
2110 const unsigned int api_min = priv->cfg->ucode_api_min;
2111 char buf[25];
2112 u8 *src;
2113 size_t len;
2114 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2115
2116 /* Ask kernel firmware_class module to get the boot firmware off disk.
2117 * request_firmware() is synchronous, file is in memory on return. */
2118 for (index = api_max; index >= api_min; index--) {
2119 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2120 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2121 if (ret < 0) {
2122 IWL_ERR(priv, "%s firmware file req failed: %d\n",
2123 buf, ret);
2124 if (ret == -ENOENT)
2125 continue;
2126 else
2127 goto error;
2128 } else {
2129 if (index < api_max)
2130 IWL_ERR(priv, "Loaded firmware %s, "
2131 "which is deprecated. "
2132 " Please use API v%u instead.\n",
2133 buf, api_max);
2134 IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2135 "(%zd bytes) from disk\n",
2136 buf, ucode_raw->size);
2137 break;
2138 }
2139 }
2140
2141 if (ret < 0)
2142 goto error;
2143
2144 /* Make sure that we got at least our header! */
2145 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
2146 IWL_ERR(priv, "File size way too small!\n");
2147 ret = -EINVAL;
2148 goto err_release;
2149 }
2150
2151 /* Data from ucode file: header followed by uCode images */
2152 ucode = (struct iwl_ucode_header *)ucode_raw->data;
2153
2154 priv->ucode_ver = le32_to_cpu(ucode->ver);
2155 api_ver = IWL_UCODE_API(priv->ucode_ver);
2156 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2157 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2158 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2159 init_data_size =
2160 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2161 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2162 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2163
2164 /* api_ver should match the api version forming part of the
2165 * firmware filename ... but we don't check for that and only rely
2166 * on the API version read from firmware header from here on forward */
2167
2168 if (api_ver < api_min || api_ver > api_max) {
2169 IWL_ERR(priv, "Driver unable to support your firmware API. "
2170 "Driver supports v%u, firmware is v%u.\n",
2171 api_max, api_ver);
2172 priv->ucode_ver = 0;
2173 ret = -EINVAL;
2174 goto err_release;
2175 }
2176 if (api_ver != api_max)
2177 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2178 "got %u. New firmware can be obtained "
2179 "from http://www.intellinuxwireless.org.\n",
2180 api_max, api_ver);
2181
2182 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2183 IWL_UCODE_MAJOR(priv->ucode_ver),
2184 IWL_UCODE_MINOR(priv->ucode_ver),
2185 IWL_UCODE_API(priv->ucode_ver),
2186 IWL_UCODE_SERIAL(priv->ucode_ver));
2187
2188 snprintf(priv->hw->wiphy->fw_version,
2189 sizeof(priv->hw->wiphy->fw_version),
2190 "%u.%u.%u.%u",
2191 IWL_UCODE_MAJOR(priv->ucode_ver),
2192 IWL_UCODE_MINOR(priv->ucode_ver),
2193 IWL_UCODE_API(priv->ucode_ver),
2194 IWL_UCODE_SERIAL(priv->ucode_ver));
2195
2196 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2197 priv->ucode_ver);
2198 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2199 inst_size);
2200 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2201 data_size);
2202 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2203 init_size);
2204 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2205 init_data_size);
2206 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2207 boot_size);
2208
2209
2210 /* Verify size of file vs. image size info in file's header */
2211 if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2212 inst_size + data_size + init_size +
2213 init_data_size + boot_size) {
2214
2215 IWL_DEBUG_INFO(priv,
2216 "uCode file size %zd does not match expected size\n",
2217 ucode_raw->size);
2218 ret = -EINVAL;
2219 goto err_release;
2220 }
2221
2222 /* Verify that uCode images will fit in card's SRAM */
2223 if (inst_size > IWL39_MAX_INST_SIZE) {
2224 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2225 inst_size);
2226 ret = -EINVAL;
2227 goto err_release;
2228 }
2229
2230 if (data_size > IWL39_MAX_DATA_SIZE) {
2231 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2232 data_size);
2233 ret = -EINVAL;
2234 goto err_release;
2235 }
2236 if (init_size > IWL39_MAX_INST_SIZE) {
2237 IWL_DEBUG_INFO(priv,
2238 "uCode init instr len %d too large to fit in\n",
2239 init_size);
2240 ret = -EINVAL;
2241 goto err_release;
2242 }
2243 if (init_data_size > IWL39_MAX_DATA_SIZE) {
2244 IWL_DEBUG_INFO(priv,
2245 "uCode init data len %d too large to fit in\n",
2246 init_data_size);
2247 ret = -EINVAL;
2248 goto err_release;
2249 }
2250 if (boot_size > IWL39_MAX_BSM_SIZE) {
2251 IWL_DEBUG_INFO(priv,
2252 "uCode boot instr len %d too large to fit in\n",
2253 boot_size);
2254 ret = -EINVAL;
2255 goto err_release;
2256 }
2257
2258 /* Allocate ucode buffers for card's bus-master loading ... */
2259
2260 /* Runtime instructions and 2 copies of data:
2261 * 1) unmodified from disk
2262 * 2) backup cache for save/restore during power-downs */
2263 priv->ucode_code.len = inst_size;
2264 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2265
2266 priv->ucode_data.len = data_size;
2267 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2268
2269 priv->ucode_data_backup.len = data_size;
2270 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2271
2272 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2273 !priv->ucode_data_backup.v_addr)
2274 goto err_pci_alloc;
2275
2276 /* Initialization instructions and data */
2277 if (init_size && init_data_size) {
2278 priv->ucode_init.len = init_size;
2279 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2280
2281 priv->ucode_init_data.len = init_data_size;
2282 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2283
2284 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2285 goto err_pci_alloc;
2286 }
2287
2288 /* Bootstrap (instructions only, no data) */
2289 if (boot_size) {
2290 priv->ucode_boot.len = boot_size;
2291 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2292
2293 if (!priv->ucode_boot.v_addr)
2294 goto err_pci_alloc;
2295 }
2296
2297 /* Copy images into buffers for card's bus-master reads ... */
2298
2299 /* Runtime instructions (first block of data in file) */
2300 len = inst_size;
2301 IWL_DEBUG_INFO(priv,
2302 "Copying (but not loading) uCode instr len %zd\n", len);
2303 memcpy(priv->ucode_code.v_addr, src, len);
2304 src += len;
2305
2306 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2307 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2308
2309 /* Runtime data (2nd block)
2310 * NOTE: Copy into backup buffer will be done in iwl3945_up() */
2311 len = data_size;
2312 IWL_DEBUG_INFO(priv,
2313 "Copying (but not loading) uCode data len %zd\n", len);
2314 memcpy(priv->ucode_data.v_addr, src, len);
2315 memcpy(priv->ucode_data_backup.v_addr, src, len);
2316 src += len;
2317
2318 /* Initialization instructions (3rd block) */
2319 if (init_size) {
2320 len = init_size;
2321 IWL_DEBUG_INFO(priv,
2322 "Copying (but not loading) init instr len %zd\n", len);
2323 memcpy(priv->ucode_init.v_addr, src, len);
2324 src += len;
2325 }
2326
2327 /* Initialization data (4th block) */
2328 if (init_data_size) {
2329 len = init_data_size;
2330 IWL_DEBUG_INFO(priv,
2331 "Copying (but not loading) init data len %zd\n", len);
2332 memcpy(priv->ucode_init_data.v_addr, src, len);
2333 src += len;
2334 }
2335
2336 /* Bootstrap instructions (5th block) */
2337 len = boot_size;
2338 IWL_DEBUG_INFO(priv,
2339 "Copying (but not loading) boot instr len %zd\n", len);
2340 memcpy(priv->ucode_boot.v_addr, src, len);
2341
2342 /* We have our copies now, allow OS release its copies */
2343 release_firmware(ucode_raw);
2344 return 0;
2345
2346 err_pci_alloc:
2347 IWL_ERR(priv, "failed to allocate pci memory\n");
2348 ret = -ENOMEM;
2349 iwl3945_dealloc_ucode_pci(priv);
2350
2351 err_release:
2352 release_firmware(ucode_raw);
2353
2354 error:
2355 return ret;
2356 }
2357
2358
2359 /**
2360 * iwl3945_set_ucode_ptrs - Set uCode address location
2361 *
2362 * Tell initialization uCode where to find runtime uCode.
2363 *
2364 * BSM registers initially contain pointers to initialization uCode.
2365 * We need to replace them to load runtime uCode inst and data,
2366 * and to save runtime data when powering down.
2367 */
2368 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2369 {
2370 dma_addr_t pinst;
2371 dma_addr_t pdata;
2372
2373 /* bits 31:0 for 3945 */
2374 pinst = priv->ucode_code.p_addr;
2375 pdata = priv->ucode_data_backup.p_addr;
2376
2377 /* Tell bootstrap uCode where to find image to load */
2378 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2379 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2380 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2381 priv->ucode_data.len);
2382
2383 /* Inst byte count must be last to set up, bit 31 signals uCode
2384 * that all new ptr/size info is in place */
2385 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2386 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2387
2388 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2389
2390 return 0;
2391 }
2392
2393 /**
2394 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2395 *
2396 * Called after REPLY_ALIVE notification received from "initialize" uCode.
2397 *
2398 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2399 */
2400 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2401 {
2402 /* Check alive response for "valid" sign from uCode */
2403 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2404 /* We had an error bringing up the hardware, so take it
2405 * all the way back down so we can try again */
2406 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2407 goto restart;
2408 }
2409
2410 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2411 * This is a paranoid check, because we would not have gotten the
2412 * "initialize" alive if code weren't properly loaded. */
2413 if (iwl3945_verify_ucode(priv)) {
2414 /* Runtime instruction load was bad;
2415 * take it all the way back down so we can try again */
2416 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2417 goto restart;
2418 }
2419
2420 /* Send pointers to protocol/runtime uCode image ... init code will
2421 * load and launch runtime uCode, which will send us another "Alive"
2422 * notification. */
2423 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2424 if (iwl3945_set_ucode_ptrs(priv)) {
2425 /* Runtime instruction load won't happen;
2426 * take it all the way back down so we can try again */
2427 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2428 goto restart;
2429 }
2430 return;
2431
2432 restart:
2433 queue_work(priv->workqueue, &priv->restart);
2434 }
2435
2436 /**
2437 * iwl3945_alive_start - called after REPLY_ALIVE notification received
2438 * from protocol/runtime uCode (initialization uCode's
2439 * Alive gets handled by iwl3945_init_alive_start()).
2440 */
2441 static void iwl3945_alive_start(struct iwl_priv *priv)
2442 {
2443 int thermal_spin = 0;
2444 u32 rfkill;
2445
2446 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2447
2448 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2449 /* We had an error bringing up the hardware, so take it
2450 * all the way back down so we can try again */
2451 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2452 goto restart;
2453 }
2454
2455 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2456 * This is a paranoid check, because we would not have gotten the
2457 * "runtime" alive if code weren't properly loaded. */
2458 if (iwl3945_verify_ucode(priv)) {
2459 /* Runtime instruction load was bad;
2460 * take it all the way back down so we can try again */
2461 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2462 goto restart;
2463 }
2464
2465 iwl_clear_stations_table(priv);
2466
2467 rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2468 IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2469
2470 if (rfkill & 0x1) {
2471 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2472 /* if RFKILL is not on, then wait for thermal
2473 * sensor in adapter to kick in */
2474 while (iwl3945_hw_get_temperature(priv) == 0) {
2475 thermal_spin++;
2476 udelay(10);
2477 }
2478
2479 if (thermal_spin)
2480 IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2481 thermal_spin * 10);
2482 } else
2483 set_bit(STATUS_RF_KILL_HW, &priv->status);
2484
2485 /* After the ALIVE response, we can send commands to 3945 uCode */
2486 set_bit(STATUS_ALIVE, &priv->status);
2487
2488 if (iwl_is_rfkill(priv))
2489 return;
2490
2491 ieee80211_wake_queues(priv->hw);
2492
2493 priv->active_rate = priv->rates_mask;
2494 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2495
2496 iwl_power_update_mode(priv, false);
2497
2498 if (iwl_is_associated(priv)) {
2499 struct iwl3945_rxon_cmd *active_rxon =
2500 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2501
2502 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2503 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2504 } else {
2505 /* Initialize our rx_config data */
2506 iwl_connection_init_rx_config(priv, priv->iw_mode);
2507 }
2508
2509 /* Configure Bluetooth device coexistence support */
2510 iwl_send_bt_config(priv);
2511
2512 /* Configure the adapter for unassociated operation */
2513 iwlcore_commit_rxon(priv);
2514
2515 iwl3945_reg_txpower_periodic(priv);
2516
2517 iwl_leds_init(priv);
2518
2519 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2520 set_bit(STATUS_READY, &priv->status);
2521 wake_up_interruptible(&priv->wait_command_queue);
2522
2523 /* reassociate for ADHOC mode */
2524 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2525 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2526 priv->vif);
2527 if (beacon)
2528 iwl_mac_beacon_update(priv->hw, beacon);
2529 }
2530
2531 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2532 iwl_set_mode(priv, priv->iw_mode);
2533
2534 return;
2535
2536 restart:
2537 queue_work(priv->workqueue, &priv->restart);
2538 }
2539
2540 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2541
2542 static void __iwl3945_down(struct iwl_priv *priv)
2543 {
2544 unsigned long flags;
2545 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2546 struct ieee80211_conf *conf = NULL;
2547
2548 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2549
2550 conf = ieee80211_get_hw_conf(priv->hw);
2551
2552 if (!exit_pending)
2553 set_bit(STATUS_EXIT_PENDING, &priv->status);
2554
2555 iwl_clear_stations_table(priv);
2556
2557 /* Unblock any waiting calls */
2558 wake_up_interruptible_all(&priv->wait_command_queue);
2559
2560 /* Wipe out the EXIT_PENDING status bit if we are not actually
2561 * exiting the module */
2562 if (!exit_pending)
2563 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2564
2565 /* stop and reset the on-board processor */
2566 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2567
2568 /* tell the device to stop sending interrupts */
2569 spin_lock_irqsave(&priv->lock, flags);
2570 iwl_disable_interrupts(priv);
2571 spin_unlock_irqrestore(&priv->lock, flags);
2572 iwl_synchronize_irq(priv);
2573
2574 if (priv->mac80211_registered)
2575 ieee80211_stop_queues(priv->hw);
2576
2577 /* If we have not previously called iwl3945_init() then
2578 * clear all bits but the RF Kill bits and return */
2579 if (!iwl_is_init(priv)) {
2580 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2581 STATUS_RF_KILL_HW |
2582 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2583 STATUS_GEO_CONFIGURED |
2584 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2585 STATUS_EXIT_PENDING;
2586 goto exit;
2587 }
2588
2589 /* ...otherwise clear out all the status bits but the RF Kill
2590 * bit and continue taking the NIC down. */
2591 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2592 STATUS_RF_KILL_HW |
2593 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2594 STATUS_GEO_CONFIGURED |
2595 test_bit(STATUS_FW_ERROR, &priv->status) <<
2596 STATUS_FW_ERROR |
2597 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2598 STATUS_EXIT_PENDING;
2599
2600 iwl3945_hw_txq_ctx_stop(priv);
2601 iwl3945_hw_rxq_stop(priv);
2602
2603 /* Power-down device's busmaster DMA clocks */
2604 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2605 udelay(5);
2606
2607 /* Stop the device, and put it in low power state */
2608 priv->cfg->ops->lib->apm_ops.stop(priv);
2609
2610 exit:
2611 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2612
2613 if (priv->ibss_beacon)
2614 dev_kfree_skb(priv->ibss_beacon);
2615 priv->ibss_beacon = NULL;
2616
2617 /* clear out any free frames */
2618 iwl3945_clear_free_frames(priv);
2619 }
2620
2621 static void iwl3945_down(struct iwl_priv *priv)
2622 {
2623 mutex_lock(&priv->mutex);
2624 __iwl3945_down(priv);
2625 mutex_unlock(&priv->mutex);
2626
2627 iwl3945_cancel_deferred_work(priv);
2628 }
2629
2630 #define MAX_HW_RESTARTS 5
2631
2632 static int __iwl3945_up(struct iwl_priv *priv)
2633 {
2634 int rc, i;
2635
2636 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2637 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2638 return -EIO;
2639 }
2640
2641 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2642 IWL_ERR(priv, "ucode not available for device bring up\n");
2643 return -EIO;
2644 }
2645
2646 /* If platform's RF_KILL switch is NOT set to KILL */
2647 if (iwl_read32(priv, CSR_GP_CNTRL) &
2648 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2649 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2650 else {
2651 set_bit(STATUS_RF_KILL_HW, &priv->status);
2652 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2653 return -ENODEV;
2654 }
2655
2656 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2657
2658 rc = iwl3945_hw_nic_init(priv);
2659 if (rc) {
2660 IWL_ERR(priv, "Unable to int nic\n");
2661 return rc;
2662 }
2663
2664 /* make sure rfkill handshake bits are cleared */
2665 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2666 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2667 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2668
2669 /* clear (again), then enable host interrupts */
2670 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2671 iwl_enable_interrupts(priv);
2672
2673 /* really make sure rfkill handshake bits are cleared */
2674 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2675 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2676
2677 /* Copy original ucode data image from disk into backup cache.
2678 * This will be used to initialize the on-board processor's
2679 * data SRAM for a clean start when the runtime program first loads. */
2680 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2681 priv->ucode_data.len);
2682
2683 /* We return success when we resume from suspend and rf_kill is on. */
2684 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2685 return 0;
2686
2687 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2688
2689 iwl_clear_stations_table(priv);
2690
2691 /* load bootstrap state machine,
2692 * load bootstrap program into processor's memory,
2693 * prepare to load the "initialize" uCode */
2694 priv->cfg->ops->lib->load_ucode(priv);
2695
2696 if (rc) {
2697 IWL_ERR(priv,
2698 "Unable to set up bootstrap uCode: %d\n", rc);
2699 continue;
2700 }
2701
2702 /* start card; "initialize" will load runtime ucode */
2703 iwl3945_nic_start(priv);
2704
2705 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2706
2707 return 0;
2708 }
2709
2710 set_bit(STATUS_EXIT_PENDING, &priv->status);
2711 __iwl3945_down(priv);
2712 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2713
2714 /* tried to restart and config the device for as long as our
2715 * patience could withstand */
2716 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2717 return -EIO;
2718 }
2719
2720
2721 /*****************************************************************************
2722 *
2723 * Workqueue callbacks
2724 *
2725 *****************************************************************************/
2726
2727 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2728 {
2729 struct iwl_priv *priv =
2730 container_of(data, struct iwl_priv, init_alive_start.work);
2731
2732 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2733 return;
2734
2735 mutex_lock(&priv->mutex);
2736 iwl3945_init_alive_start(priv);
2737 mutex_unlock(&priv->mutex);
2738 }
2739
2740 static void iwl3945_bg_alive_start(struct work_struct *data)
2741 {
2742 struct iwl_priv *priv =
2743 container_of(data, struct iwl_priv, alive_start.work);
2744
2745 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2746 return;
2747
2748 mutex_lock(&priv->mutex);
2749 iwl3945_alive_start(priv);
2750 mutex_unlock(&priv->mutex);
2751 }
2752
2753 /*
2754 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2755 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2756 * *is* readable even when device has been SW_RESET into low power mode
2757 * (e.g. during RF KILL).
2758 */
2759 static void iwl3945_rfkill_poll(struct work_struct *data)
2760 {
2761 struct iwl_priv *priv =
2762 container_of(data, struct iwl_priv, rfkill_poll.work);
2763 bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2764 bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2765 & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2766
2767 if (new_rfkill != old_rfkill) {
2768 if (new_rfkill)
2769 set_bit(STATUS_RF_KILL_HW, &priv->status);
2770 else
2771 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2772
2773 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2774
2775 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2776 new_rfkill ? "disable radio" : "enable radio");
2777 }
2778
2779 /* Keep this running, even if radio now enabled. This will be
2780 * cancelled in mac_start() if system decides to start again */
2781 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2782 round_jiffies_relative(2 * HZ));
2783
2784 }
2785
2786 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2787 static void iwl3945_bg_request_scan(struct work_struct *data)
2788 {
2789 struct iwl_priv *priv =
2790 container_of(data, struct iwl_priv, request_scan);
2791 struct iwl_host_cmd cmd = {
2792 .id = REPLY_SCAN_CMD,
2793 .len = sizeof(struct iwl3945_scan_cmd),
2794 .flags = CMD_SIZE_HUGE,
2795 };
2796 int rc = 0;
2797 struct iwl3945_scan_cmd *scan;
2798 struct ieee80211_conf *conf = NULL;
2799 u8 n_probes = 0;
2800 enum ieee80211_band band;
2801 bool is_active = false;
2802
2803 conf = ieee80211_get_hw_conf(priv->hw);
2804
2805 mutex_lock(&priv->mutex);
2806
2807 cancel_delayed_work(&priv->scan_check);
2808
2809 if (!iwl_is_ready(priv)) {
2810 IWL_WARN(priv, "request scan called when driver not ready.\n");
2811 goto done;
2812 }
2813
2814 /* Make sure the scan wasn't canceled before this queued work
2815 * was given the chance to run... */
2816 if (!test_bit(STATUS_SCANNING, &priv->status))
2817 goto done;
2818
2819 /* This should never be called or scheduled if there is currently
2820 * a scan active in the hardware. */
2821 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2822 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests "
2823 "Ignoring second request.\n");
2824 rc = -EIO;
2825 goto done;
2826 }
2827
2828 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2829 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2830 goto done;
2831 }
2832
2833 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2834 IWL_DEBUG_HC(priv,
2835 "Scan request while abort pending. Queuing.\n");
2836 goto done;
2837 }
2838
2839 if (iwl_is_rfkill(priv)) {
2840 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2841 goto done;
2842 }
2843
2844 if (!test_bit(STATUS_READY, &priv->status)) {
2845 IWL_DEBUG_HC(priv,
2846 "Scan request while uninitialized. Queuing.\n");
2847 goto done;
2848 }
2849
2850 if (!priv->scan_bands) {
2851 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2852 goto done;
2853 }
2854
2855 if (!priv->scan) {
2856 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2857 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2858 if (!priv->scan) {
2859 rc = -ENOMEM;
2860 goto done;
2861 }
2862 }
2863 scan = priv->scan;
2864 memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2865
2866 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2867 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2868
2869 if (iwl_is_associated(priv)) {
2870 u16 interval = 0;
2871 u32 extra;
2872 u32 suspend_time = 100;
2873 u32 scan_suspend_time = 100;
2874 unsigned long flags;
2875
2876 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2877
2878 spin_lock_irqsave(&priv->lock, flags);
2879 interval = priv->beacon_int;
2880 spin_unlock_irqrestore(&priv->lock, flags);
2881
2882 scan->suspend_time = 0;
2883 scan->max_out_time = cpu_to_le32(200 * 1024);
2884 if (!interval)
2885 interval = suspend_time;
2886 /*
2887 * suspend time format:
2888 * 0-19: beacon interval in usec (time before exec.)
2889 * 20-23: 0
2890 * 24-31: number of beacons (suspend between channels)
2891 */
2892
2893 extra = (suspend_time / interval) << 24;
2894 scan_suspend_time = 0xFF0FFFFF &
2895 (extra | ((suspend_time % interval) * 1024));
2896
2897 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2898 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2899 scan_suspend_time, interval);
2900 }
2901
2902 if (priv->scan_request->n_ssids) {
2903 int i, p = 0;
2904 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2905 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2906 /* always does wildcard anyway */
2907 if (!priv->scan_request->ssids[i].ssid_len)
2908 continue;
2909 scan->direct_scan[p].id = WLAN_EID_SSID;
2910 scan->direct_scan[p].len =
2911 priv->scan_request->ssids[i].ssid_len;
2912 memcpy(scan->direct_scan[p].ssid,
2913 priv->scan_request->ssids[i].ssid,
2914 priv->scan_request->ssids[i].ssid_len);
2915 n_probes++;
2916 p++;
2917 }
2918 is_active = true;
2919 } else
2920 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2921
2922 /* We don't build a direct scan probe request; the uCode will do
2923 * that based on the direct_mask added to each channel entry */
2924 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2925 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2926 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2927
2928 /* flags + rate selection */
2929
2930 if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2931 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2932 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2933 scan->good_CRC_th = 0;
2934 band = IEEE80211_BAND_2GHZ;
2935 } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2936 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2937 /*
2938 * If active scaning is requested but a certain channel
2939 * is marked passive, we can do active scanning if we
2940 * detect transmissions.
2941 */
2942 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2943 band = IEEE80211_BAND_5GHZ;
2944 } else {
2945 IWL_WARN(priv, "Invalid scan band count\n");
2946 goto done;
2947 }
2948
2949 scan->tx_cmd.len = cpu_to_le16(
2950 iwl_fill_probe_req(priv,
2951 (struct ieee80211_mgmt *)scan->data,
2952 priv->scan_request->ie,
2953 priv->scan_request->ie_len,
2954 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2955
2956 /* select Rx antennas */
2957 scan->flags |= iwl3945_get_antenna_flags(priv);
2958
2959 if (iwl_is_monitor_mode(priv))
2960 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2961
2962 scan->channel_count =
2963 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2964 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2965
2966 if (scan->channel_count == 0) {
2967 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2968 goto done;
2969 }
2970
2971 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2972 scan->channel_count * sizeof(struct iwl3945_scan_channel);
2973 cmd.data = scan;
2974 scan->len = cpu_to_le16(cmd.len);
2975
2976 set_bit(STATUS_SCAN_HW, &priv->status);
2977 rc = iwl_send_cmd_sync(priv, &cmd);
2978 if (rc)
2979 goto done;
2980
2981 queue_delayed_work(priv->workqueue, &priv->scan_check,
2982 IWL_SCAN_CHECK_WATCHDOG);
2983
2984 mutex_unlock(&priv->mutex);
2985 return;
2986
2987 done:
2988 /* can not perform scan make sure we clear scanning
2989 * bits from status so next scan request can be performed.
2990 * if we dont clear scanning status bit here all next scan
2991 * will fail
2992 */
2993 clear_bit(STATUS_SCAN_HW, &priv->status);
2994 clear_bit(STATUS_SCANNING, &priv->status);
2995
2996 /* inform mac80211 scan aborted */
2997 queue_work(priv->workqueue, &priv->scan_completed);
2998 mutex_unlock(&priv->mutex);
2999 }
3000
3001 static void iwl3945_bg_up(struct work_struct *data)
3002 {
3003 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3004
3005 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3006 return;
3007
3008 mutex_lock(&priv->mutex);
3009 __iwl3945_up(priv);
3010 mutex_unlock(&priv->mutex);
3011 }
3012
3013 static void iwl3945_bg_restart(struct work_struct *data)
3014 {
3015 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3016
3017 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3018 return;
3019
3020 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3021 mutex_lock(&priv->mutex);
3022 priv->vif = NULL;
3023 priv->is_open = 0;
3024 mutex_unlock(&priv->mutex);
3025 iwl3945_down(priv);
3026 ieee80211_restart_hw(priv->hw);
3027 } else {
3028 iwl3945_down(priv);
3029 queue_work(priv->workqueue, &priv->up);
3030 }
3031 }
3032
3033 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3034 {
3035 struct iwl_priv *priv =
3036 container_of(data, struct iwl_priv, rx_replenish);
3037
3038 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3039 return;
3040
3041 mutex_lock(&priv->mutex);
3042 iwl3945_rx_replenish(priv);
3043 mutex_unlock(&priv->mutex);
3044 }
3045
3046 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3047
3048 void iwl3945_post_associate(struct iwl_priv *priv)
3049 {
3050 int rc = 0;
3051 struct ieee80211_conf *conf = NULL;
3052
3053 if (priv->iw_mode == NL80211_IFTYPE_AP) {
3054 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3055 return;
3056 }
3057
3058
3059 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3060 priv->assoc_id, priv->active_rxon.bssid_addr);
3061
3062 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3063 return;
3064
3065 if (!priv->vif || !priv->is_open)
3066 return;
3067
3068 iwl_scan_cancel_timeout(priv, 200);
3069
3070 conf = ieee80211_get_hw_conf(priv->hw);
3071
3072 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3073 iwlcore_commit_rxon(priv);
3074
3075 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3076 iwl_setup_rxon_timing(priv);
3077 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3078 sizeof(priv->rxon_timing), &priv->rxon_timing);
3079 if (rc)
3080 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3081 "Attempting to continue.\n");
3082
3083 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3084
3085 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3086
3087 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3088 priv->assoc_id, priv->beacon_int);
3089
3090 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3091 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3092 else
3093 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3094
3095 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3096 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3097 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3098 else
3099 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3100
3101 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3102 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3103
3104 }
3105
3106 iwlcore_commit_rxon(priv);
3107
3108 switch (priv->iw_mode) {
3109 case NL80211_IFTYPE_STATION:
3110 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3111 break;
3112
3113 case NL80211_IFTYPE_ADHOC:
3114
3115 priv->assoc_id = 1;
3116 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3117 iwl3945_sync_sta(priv, IWL_STA_ID,
3118 (priv->band == IEEE80211_BAND_5GHZ) ?
3119 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3120 CMD_ASYNC);
3121 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3122 iwl3945_send_beacon_cmd(priv);
3123
3124 break;
3125
3126 default:
3127 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3128 __func__, priv->iw_mode);
3129 break;
3130 }
3131
3132 iwl_activate_qos(priv, 0);
3133
3134 /* we have just associated, don't start scan too early */
3135 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3136 }
3137
3138 /*****************************************************************************
3139 *
3140 * mac80211 entry point functions
3141 *
3142 *****************************************************************************/
3143
3144 #define UCODE_READY_TIMEOUT (2 * HZ)
3145
3146 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3147 {
3148 struct iwl_priv *priv = hw->priv;
3149 int ret;
3150
3151 IWL_DEBUG_MAC80211(priv, "enter\n");
3152
3153 /* we should be verifying the device is ready to be opened */
3154 mutex_lock(&priv->mutex);
3155
3156 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3157 * ucode filename and max sizes are card-specific. */
3158
3159 if (!priv->ucode_code.len) {
3160 ret = iwl3945_read_ucode(priv);
3161 if (ret) {
3162 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3163 mutex_unlock(&priv->mutex);
3164 goto out_release_irq;
3165 }
3166 }
3167
3168 ret = __iwl3945_up(priv);
3169
3170 mutex_unlock(&priv->mutex);
3171
3172 if (ret)
3173 goto out_release_irq;
3174
3175 IWL_DEBUG_INFO(priv, "Start UP work.\n");
3176
3177 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3178 * mac80211 will not be run successfully. */
3179 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3180 test_bit(STATUS_READY, &priv->status),
3181 UCODE_READY_TIMEOUT);
3182 if (!ret) {
3183 if (!test_bit(STATUS_READY, &priv->status)) {
3184 IWL_ERR(priv,
3185 "Wait for START_ALIVE timeout after %dms.\n",
3186 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3187 ret = -ETIMEDOUT;
3188 goto out_release_irq;
3189 }
3190 }
3191
3192 /* ucode is running and will send rfkill notifications,
3193 * no need to poll the killswitch state anymore */
3194 cancel_delayed_work(&priv->rfkill_poll);
3195
3196 iwl_led_start(priv);
3197
3198 priv->is_open = 1;
3199 IWL_DEBUG_MAC80211(priv, "leave\n");
3200 return 0;
3201
3202 out_release_irq:
3203 priv->is_open = 0;
3204 IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3205 return ret;
3206 }
3207
3208 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3209 {
3210 struct iwl_priv *priv = hw->priv;
3211
3212 IWL_DEBUG_MAC80211(priv, "enter\n");
3213
3214 if (!priv->is_open) {
3215 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3216 return;
3217 }
3218
3219 priv->is_open = 0;
3220
3221 if (iwl_is_ready_rf(priv)) {
3222 /* stop mac, cancel any scan request and clear
3223 * RXON_FILTER_ASSOC_MSK BIT
3224 */
3225 mutex_lock(&priv->mutex);
3226 iwl_scan_cancel_timeout(priv, 100);
3227 mutex_unlock(&priv->mutex);
3228 }
3229
3230 iwl3945_down(priv);
3231
3232 flush_workqueue(priv->workqueue);
3233
3234 /* start polling the killswitch state again */
3235 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3236 round_jiffies_relative(2 * HZ));
3237
3238 IWL_DEBUG_MAC80211(priv, "leave\n");
3239 }
3240
3241 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3242 {
3243 struct iwl_priv *priv = hw->priv;
3244
3245 IWL_DEBUG_MAC80211(priv, "enter\n");
3246
3247 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3248 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3249
3250 if (iwl3945_tx_skb(priv, skb))
3251 dev_kfree_skb_any(skb);
3252
3253 IWL_DEBUG_MAC80211(priv, "leave\n");
3254 return NETDEV_TX_OK;
3255 }
3256
3257 void iwl3945_config_ap(struct iwl_priv *priv)
3258 {
3259 int rc = 0;
3260
3261 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3262 return;
3263
3264 /* The following should be done only at AP bring up */
3265 if (!(iwl_is_associated(priv))) {
3266
3267 /* RXON - unassoc (to set timing command) */
3268 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3269 iwlcore_commit_rxon(priv);
3270
3271 /* RXON Timing */
3272 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3273 iwl_setup_rxon_timing(priv);
3274 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3275 sizeof(priv->rxon_timing),
3276 &priv->rxon_timing);
3277 if (rc)
3278 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3279 "Attempting to continue.\n");
3280
3281 /* FIXME: what should be the assoc_id for AP? */
3282 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3283 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3284 priv->staging_rxon.flags |=
3285 RXON_FLG_SHORT_PREAMBLE_MSK;
3286 else
3287 priv->staging_rxon.flags &=
3288 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3289
3290 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3291 if (priv->assoc_capability &
3292 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3293 priv->staging_rxon.flags |=
3294 RXON_FLG_SHORT_SLOT_MSK;
3295 else
3296 priv->staging_rxon.flags &=
3297 ~RXON_FLG_SHORT_SLOT_MSK;
3298
3299 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3300 priv->staging_rxon.flags &=
3301 ~RXON_FLG_SHORT_SLOT_MSK;
3302 }
3303 /* restore RXON assoc */
3304 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3305 iwlcore_commit_rxon(priv);
3306 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3307 }
3308 iwl3945_send_beacon_cmd(priv);
3309
3310 /* FIXME - we need to add code here to detect a totally new
3311 * configuration, reset the AP, unassoc, rxon timing, assoc,
3312 * clear sta table, add BCAST sta... */
3313 }
3314
3315 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3316 struct ieee80211_vif *vif,
3317 struct ieee80211_sta *sta,
3318 struct ieee80211_key_conf *key)
3319 {
3320 struct iwl_priv *priv = hw->priv;
3321 const u8 *addr;
3322 int ret = 0;
3323 u8 sta_id = IWL_INVALID_STATION;
3324 u8 static_key;
3325
3326 IWL_DEBUG_MAC80211(priv, "enter\n");
3327
3328 if (iwl3945_mod_params.sw_crypto) {
3329 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3330 return -EOPNOTSUPP;
3331 }
3332
3333 addr = sta ? sta->addr : iwl_bcast_addr;
3334 static_key = !iwl_is_associated(priv);
3335
3336 if (!static_key) {
3337 sta_id = iwl_find_station(priv, addr);
3338 if (sta_id == IWL_INVALID_STATION) {
3339 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3340 addr);
3341 return -EINVAL;
3342 }
3343 }
3344
3345 mutex_lock(&priv->mutex);
3346 iwl_scan_cancel_timeout(priv, 100);
3347 mutex_unlock(&priv->mutex);
3348
3349 switch (cmd) {
3350 case SET_KEY:
3351 if (static_key)
3352 ret = iwl3945_set_static_key(priv, key);
3353 else
3354 ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3355 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3356 break;
3357 case DISABLE_KEY:
3358 if (static_key)
3359 ret = iwl3945_remove_static_key(priv);
3360 else
3361 ret = iwl3945_clear_sta_key_info(priv, sta_id);
3362 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3363 break;
3364 default:
3365 ret = -EINVAL;
3366 }
3367
3368 IWL_DEBUG_MAC80211(priv, "leave\n");
3369
3370 return ret;
3371 }
3372
3373 /*****************************************************************************
3374 *
3375 * sysfs attributes
3376 *
3377 *****************************************************************************/
3378
3379 #ifdef CONFIG_IWLWIFI_DEBUG
3380
3381 /*
3382 * The following adds a new attribute to the sysfs representation
3383 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3384 * used for controlling the debug level.
3385 *
3386 * See the level definitions in iwl for details.
3387 *
3388 * The debug_level being managed using sysfs below is a per device debug
3389 * level that is used instead of the global debug level if it (the per
3390 * device debug level) is set.
3391 */
3392 static ssize_t show_debug_level(struct device *d,
3393 struct device_attribute *attr, char *buf)
3394 {
3395 struct iwl_priv *priv = dev_get_drvdata(d);
3396 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3397 }
3398 static ssize_t store_debug_level(struct device *d,
3399 struct device_attribute *attr,
3400 const char *buf, size_t count)
3401 {
3402 struct iwl_priv *priv = dev_get_drvdata(d);
3403 unsigned long val;
3404 int ret;
3405
3406 ret = strict_strtoul(buf, 0, &val);
3407 if (ret)
3408 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3409 else {
3410 priv->debug_level = val;
3411 if (iwl_alloc_traffic_mem(priv))
3412 IWL_ERR(priv,
3413 "Not enough memory to generate traffic log\n");
3414 }
3415 return strnlen(buf, count);
3416 }
3417
3418 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3419 show_debug_level, store_debug_level);
3420
3421 #endif /* CONFIG_IWLWIFI_DEBUG */
3422
3423 static ssize_t show_temperature(struct device *d,
3424 struct device_attribute *attr, char *buf)
3425 {
3426 struct iwl_priv *priv = dev_get_drvdata(d);
3427
3428 if (!iwl_is_alive(priv))
3429 return -EAGAIN;
3430
3431 return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3432 }
3433
3434 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3435
3436 static ssize_t show_tx_power(struct device *d,
3437 struct device_attribute *attr, char *buf)
3438 {
3439 struct iwl_priv *priv = dev_get_drvdata(d);
3440 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3441 }
3442
3443 static ssize_t store_tx_power(struct device *d,
3444 struct device_attribute *attr,
3445 const char *buf, size_t count)
3446 {
3447 struct iwl_priv *priv = dev_get_drvdata(d);
3448 char *p = (char *)buf;
3449 u32 val;
3450
3451 val = simple_strtoul(p, &p, 10);
3452 if (p == buf)
3453 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3454 else
3455 iwl3945_hw_reg_set_txpower(priv, val);
3456
3457 return count;
3458 }
3459
3460 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3461
3462 static ssize_t show_flags(struct device *d,
3463 struct device_attribute *attr, char *buf)
3464 {
3465 struct iwl_priv *priv = dev_get_drvdata(d);
3466
3467 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3468 }
3469
3470 static ssize_t store_flags(struct device *d,
3471 struct device_attribute *attr,
3472 const char *buf, size_t count)
3473 {
3474 struct iwl_priv *priv = dev_get_drvdata(d);
3475 u32 flags = simple_strtoul(buf, NULL, 0);
3476
3477 mutex_lock(&priv->mutex);
3478 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3479 /* Cancel any currently running scans... */
3480 if (iwl_scan_cancel_timeout(priv, 100))
3481 IWL_WARN(priv, "Could not cancel scan.\n");
3482 else {
3483 IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3484 flags);
3485 priv->staging_rxon.flags = cpu_to_le32(flags);
3486 iwlcore_commit_rxon(priv);
3487 }
3488 }
3489 mutex_unlock(&priv->mutex);
3490
3491 return count;
3492 }
3493
3494 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3495
3496 static ssize_t show_filter_flags(struct device *d,
3497 struct device_attribute *attr, char *buf)
3498 {
3499 struct iwl_priv *priv = dev_get_drvdata(d);
3500
3501 return sprintf(buf, "0x%04X\n",
3502 le32_to_cpu(priv->active_rxon.filter_flags));
3503 }
3504
3505 static ssize_t store_filter_flags(struct device *d,
3506 struct device_attribute *attr,
3507 const char *buf, size_t count)
3508 {
3509 struct iwl_priv *priv = dev_get_drvdata(d);
3510 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3511
3512 mutex_lock(&priv->mutex);
3513 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3514 /* Cancel any currently running scans... */
3515 if (iwl_scan_cancel_timeout(priv, 100))
3516 IWL_WARN(priv, "Could not cancel scan.\n");
3517 else {
3518 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3519 "0x%04X\n", filter_flags);
3520 priv->staging_rxon.filter_flags =
3521 cpu_to_le32(filter_flags);
3522 iwlcore_commit_rxon(priv);
3523 }
3524 }
3525 mutex_unlock(&priv->mutex);
3526
3527 return count;
3528 }
3529
3530 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3531 store_filter_flags);
3532
3533 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3534
3535 static ssize_t show_measurement(struct device *d,
3536 struct device_attribute *attr, char *buf)
3537 {
3538 struct iwl_priv *priv = dev_get_drvdata(d);
3539 struct iwl_spectrum_notification measure_report;
3540 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3541 u8 *data = (u8 *)&measure_report;
3542 unsigned long flags;
3543
3544 spin_lock_irqsave(&priv->lock, flags);
3545 if (!(priv->measurement_status & MEASUREMENT_READY)) {
3546 spin_unlock_irqrestore(&priv->lock, flags);
3547 return 0;
3548 }
3549 memcpy(&measure_report, &priv->measure_report, size);
3550 priv->measurement_status = 0;
3551 spin_unlock_irqrestore(&priv->lock, flags);
3552
3553 while (size && (PAGE_SIZE - len)) {
3554 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3555 PAGE_SIZE - len, 1);
3556 len = strlen(buf);
3557 if (PAGE_SIZE - len)
3558 buf[len++] = '\n';
3559
3560 ofs += 16;
3561 size -= min(size, 16U);
3562 }
3563
3564 return len;
3565 }
3566
3567 static ssize_t store_measurement(struct device *d,
3568 struct device_attribute *attr,
3569 const char *buf, size_t count)
3570 {
3571 struct iwl_priv *priv = dev_get_drvdata(d);
3572 struct ieee80211_measurement_params params = {
3573 .channel = le16_to_cpu(priv->active_rxon.channel),
3574 .start_time = cpu_to_le64(priv->last_tsf),
3575 .duration = cpu_to_le16(1),
3576 };
3577 u8 type = IWL_MEASURE_BASIC;
3578 u8 buffer[32];
3579 u8 channel;
3580
3581 if (count) {
3582 char *p = buffer;
3583 strncpy(buffer, buf, min(sizeof(buffer), count));
3584 channel = simple_strtoul(p, NULL, 0);
3585 if (channel)
3586 params.channel = channel;
3587
3588 p = buffer;
3589 while (*p && *p != ' ')
3590 p++;
3591 if (*p)
3592 type = simple_strtoul(p + 1, NULL, 0);
3593 }
3594
3595 IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3596 "channel %d (for '%s')\n", type, params.channel, buf);
3597 iwl3945_get_measurement(priv, &params, type);
3598
3599 return count;
3600 }
3601
3602 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3603 show_measurement, store_measurement);
3604 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3605
3606 static ssize_t store_retry_rate(struct device *d,
3607 struct device_attribute *attr,
3608 const char *buf, size_t count)
3609 {
3610 struct iwl_priv *priv = dev_get_drvdata(d);
3611
3612 priv->retry_rate = simple_strtoul(buf, NULL, 0);
3613 if (priv->retry_rate <= 0)
3614 priv->retry_rate = 1;
3615
3616 return count;
3617 }
3618
3619 static ssize_t show_retry_rate(struct device *d,
3620 struct device_attribute *attr, char *buf)
3621 {
3622 struct iwl_priv *priv = dev_get_drvdata(d);
3623 return sprintf(buf, "%d", priv->retry_rate);
3624 }
3625
3626 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3627 store_retry_rate);
3628
3629
3630 static ssize_t show_channels(struct device *d,
3631 struct device_attribute *attr, char *buf)
3632 {
3633 /* all this shit doesn't belong into sysfs anyway */
3634 return 0;
3635 }
3636
3637 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3638
3639 static ssize_t show_statistics(struct device *d,
3640 struct device_attribute *attr, char *buf)
3641 {
3642 struct iwl_priv *priv = dev_get_drvdata(d);
3643 u32 size = sizeof(struct iwl3945_notif_statistics);
3644 u32 len = 0, ofs = 0;
3645 u8 *data = (u8 *)&priv->statistics_39;
3646 int rc = 0;
3647
3648 if (!iwl_is_alive(priv))
3649 return -EAGAIN;
3650
3651 mutex_lock(&priv->mutex);
3652 rc = iwl_send_statistics_request(priv, 0);
3653 mutex_unlock(&priv->mutex);
3654
3655 if (rc) {
3656 len = sprintf(buf,
3657 "Error sending statistics request: 0x%08X\n", rc);
3658 return len;
3659 }
3660
3661 while (size && (PAGE_SIZE - len)) {
3662 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3663 PAGE_SIZE - len, 1);
3664 len = strlen(buf);
3665 if (PAGE_SIZE - len)
3666 buf[len++] = '\n';
3667
3668 ofs += 16;
3669 size -= min(size, 16U);
3670 }
3671
3672 return len;
3673 }
3674
3675 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3676
3677 static ssize_t show_antenna(struct device *d,
3678 struct device_attribute *attr, char *buf)
3679 {
3680 struct iwl_priv *priv = dev_get_drvdata(d);
3681
3682 if (!iwl_is_alive(priv))
3683 return -EAGAIN;
3684
3685 return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3686 }
3687
3688 static ssize_t store_antenna(struct device *d,
3689 struct device_attribute *attr,
3690 const char *buf, size_t count)
3691 {
3692 struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3693 int ant;
3694
3695 if (count == 0)
3696 return 0;
3697
3698 if (sscanf(buf, "%1i", &ant) != 1) {
3699 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3700 return count;
3701 }
3702
3703 if ((ant >= 0) && (ant <= 2)) {
3704 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3705 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3706 } else
3707 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3708
3709
3710 return count;
3711 }
3712
3713 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3714
3715 static ssize_t show_status(struct device *d,
3716 struct device_attribute *attr, char *buf)
3717 {
3718 struct iwl_priv *priv = dev_get_drvdata(d);
3719 if (!iwl_is_alive(priv))
3720 return -EAGAIN;
3721 return sprintf(buf, "0x%08x\n", (int)priv->status);
3722 }
3723
3724 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3725
3726 static ssize_t dump_error_log(struct device *d,
3727 struct device_attribute *attr,
3728 const char *buf, size_t count)
3729 {
3730 struct iwl_priv *priv = dev_get_drvdata(d);
3731 char *p = (char *)buf;
3732
3733 if (p[0] == '1')
3734 iwl3945_dump_nic_error_log(priv);
3735
3736 return strnlen(buf, count);
3737 }
3738
3739 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3740
3741 /*****************************************************************************
3742 *
3743 * driver setup and tear down
3744 *
3745 *****************************************************************************/
3746
3747 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3748 {
3749 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3750
3751 init_waitqueue_head(&priv->wait_command_queue);
3752
3753 INIT_WORK(&priv->up, iwl3945_bg_up);
3754 INIT_WORK(&priv->restart, iwl3945_bg_restart);
3755 INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3756 INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3757 INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3758 INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3759 INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3760 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3761 INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3762 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3763 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3764
3765 iwl3945_hw_setup_deferred_work(priv);
3766
3767 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3768 iwl3945_irq_tasklet, (unsigned long)priv);
3769 }
3770
3771 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3772 {
3773 iwl3945_hw_cancel_deferred_work(priv);
3774
3775 cancel_delayed_work_sync(&priv->init_alive_start);
3776 cancel_delayed_work(&priv->scan_check);
3777 cancel_delayed_work(&priv->alive_start);
3778 cancel_work_sync(&priv->beacon_update);
3779 }
3780
3781 static struct attribute *iwl3945_sysfs_entries[] = {
3782 &dev_attr_antenna.attr,
3783 &dev_attr_channels.attr,
3784 &dev_attr_dump_errors.attr,
3785 &dev_attr_flags.attr,
3786 &dev_attr_filter_flags.attr,
3787 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3788 &dev_attr_measurement.attr,
3789 #endif
3790 &dev_attr_retry_rate.attr,
3791 &dev_attr_statistics.attr,
3792 &dev_attr_status.attr,
3793 &dev_attr_temperature.attr,
3794 &dev_attr_tx_power.attr,
3795 #ifdef CONFIG_IWLWIFI_DEBUG
3796 &dev_attr_debug_level.attr,
3797 #endif
3798 NULL
3799 };
3800
3801 static struct attribute_group iwl3945_attribute_group = {
3802 .name = NULL, /* put in device directory */
3803 .attrs = iwl3945_sysfs_entries,
3804 };
3805
3806 static struct ieee80211_ops iwl3945_hw_ops = {
3807 .tx = iwl3945_mac_tx,
3808 .start = iwl3945_mac_start,
3809 .stop = iwl3945_mac_stop,
3810 .add_interface = iwl_mac_add_interface,
3811 .remove_interface = iwl_mac_remove_interface,
3812 .config = iwl_mac_config,
3813 .configure_filter = iwl_configure_filter,
3814 .set_key = iwl3945_mac_set_key,
3815 .get_tx_stats = iwl_mac_get_tx_stats,
3816 .conf_tx = iwl_mac_conf_tx,
3817 .reset_tsf = iwl_mac_reset_tsf,
3818 .bss_info_changed = iwl_bss_info_changed,
3819 .hw_scan = iwl_mac_hw_scan
3820 };
3821
3822 static int iwl3945_init_drv(struct iwl_priv *priv)
3823 {
3824 int ret;
3825 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3826
3827 priv->retry_rate = 1;
3828 priv->ibss_beacon = NULL;
3829
3830 spin_lock_init(&priv->lock);
3831 spin_lock_init(&priv->sta_lock);
3832 spin_lock_init(&priv->hcmd_lock);
3833
3834 INIT_LIST_HEAD(&priv->free_frames);
3835
3836 mutex_init(&priv->mutex);
3837
3838 /* Clear the driver's (not device's) station table */
3839 iwl_clear_stations_table(priv);
3840
3841 priv->ieee_channels = NULL;
3842 priv->ieee_rates = NULL;
3843 priv->band = IEEE80211_BAND_2GHZ;
3844
3845 priv->iw_mode = NL80211_IFTYPE_STATION;
3846
3847 iwl_reset_qos(priv);
3848
3849 priv->qos_data.qos_active = 0;
3850 priv->qos_data.qos_cap.val = 0;
3851
3852 priv->rates_mask = IWL_RATES_MASK;
3853 priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3854
3855 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3856 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3857 eeprom->version);
3858 ret = -EINVAL;
3859 goto err;
3860 }
3861 ret = iwl_init_channel_map(priv);
3862 if (ret) {
3863 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3864 goto err;
3865 }
3866
3867 /* Set up txpower settings in driver for all channels */
3868 if (iwl3945_txpower_set_from_eeprom(priv)) {
3869 ret = -EIO;
3870 goto err_free_channel_map;
3871 }
3872
3873 ret = iwlcore_init_geos(priv);
3874 if (ret) {
3875 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3876 goto err_free_channel_map;
3877 }
3878 iwl3945_init_hw_rates(priv, priv->ieee_rates);
3879
3880 return 0;
3881
3882 err_free_channel_map:
3883 iwl_free_channel_map(priv);
3884 err:
3885 return ret;
3886 }
3887
3888 static int iwl3945_setup_mac(struct iwl_priv *priv)
3889 {
3890 int ret;
3891 struct ieee80211_hw *hw = priv->hw;
3892
3893 hw->rate_control_algorithm = "iwl-3945-rs";
3894 hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3895
3896 /* Tell mac80211 our characteristics */
3897 hw->flags = IEEE80211_HW_SIGNAL_DBM |
3898 IEEE80211_HW_NOISE_DBM |
3899 IEEE80211_HW_SPECTRUM_MGMT |
3900 IEEE80211_HW_SUPPORTS_PS |
3901 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3902
3903 hw->wiphy->interface_modes =
3904 BIT(NL80211_IFTYPE_STATION) |
3905 BIT(NL80211_IFTYPE_ADHOC);
3906
3907 hw->wiphy->custom_regulatory = true;
3908
3909 /* Firmware does not support this */
3910 hw->wiphy->disable_beacon_hints = true;
3911
3912 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3913 /* we create the 802.11 header and a zero-length SSID element */
3914 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3915
3916 /* Default value; 4 EDCA QOS priorities */
3917 hw->queues = 4;
3918
3919 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3920 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3921 &priv->bands[IEEE80211_BAND_2GHZ];
3922
3923 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3924 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3925 &priv->bands[IEEE80211_BAND_5GHZ];
3926
3927 ret = ieee80211_register_hw(priv->hw);
3928 if (ret) {
3929 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3930 return ret;
3931 }
3932 priv->mac80211_registered = 1;
3933
3934 return 0;
3935 }
3936
3937 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3938 {
3939 int err = 0;
3940 struct iwl_priv *priv;
3941 struct ieee80211_hw *hw;
3942 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3943 struct iwl3945_eeprom *eeprom;
3944 unsigned long flags;
3945
3946 /***********************
3947 * 1. Allocating HW data
3948 * ********************/
3949
3950 /* mac80211 allocates memory for this device instance, including
3951 * space for this driver's private structure */
3952 hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3953 if (hw == NULL) {
3954 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3955 err = -ENOMEM;
3956 goto out;
3957 }
3958 priv = hw->priv;
3959 SET_IEEE80211_DEV(hw, &pdev->dev);
3960
3961 /*
3962 * Disabling hardware scan means that mac80211 will perform scans
3963 * "the hard way", rather than using device's scan.
3964 */
3965 if (iwl3945_mod_params.disable_hw_scan) {
3966 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3967 iwl3945_hw_ops.hw_scan = NULL;
3968 }
3969
3970
3971 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3972 priv->cfg = cfg;
3973 priv->pci_dev = pdev;
3974 priv->inta_mask = CSR_INI_SET_MASK;
3975
3976 #ifdef CONFIG_IWLWIFI_DEBUG
3977 atomic_set(&priv->restrict_refcnt, 0);
3978 #endif
3979 if (iwl_alloc_traffic_mem(priv))
3980 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3981
3982 /***************************
3983 * 2. Initializing PCI bus
3984 * *************************/
3985 if (pci_enable_device(pdev)) {
3986 err = -ENODEV;
3987 goto out_ieee80211_free_hw;
3988 }
3989
3990 pci_set_master(pdev);
3991
3992 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3993 if (!err)
3994 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3995 if (err) {
3996 IWL_WARN(priv, "No suitable DMA available.\n");
3997 goto out_pci_disable_device;
3998 }
3999
4000 pci_set_drvdata(pdev, priv);
4001 err = pci_request_regions(pdev, DRV_NAME);
4002 if (err)
4003 goto out_pci_disable_device;
4004
4005 /***********************
4006 * 3. Read REV Register
4007 * ********************/
4008 priv->hw_base = pci_iomap(pdev, 0, 0);
4009 if (!priv->hw_base) {
4010 err = -ENODEV;
4011 goto out_pci_release_regions;
4012 }
4013
4014 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4015 (unsigned long long) pci_resource_len(pdev, 0));
4016 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4017
4018 /* We disable the RETRY_TIMEOUT register (0x41) to keep
4019 * PCI Tx retries from interfering with C3 CPU state */
4020 pci_write_config_byte(pdev, 0x41, 0x00);
4021
4022 /* this spin lock will be used in apm_ops.init and EEPROM access
4023 * we should init now
4024 */
4025 spin_lock_init(&priv->reg_lock);
4026
4027 /***********************
4028 * 4. Read EEPROM
4029 * ********************/
4030
4031 /* Read the EEPROM */
4032 err = iwl_eeprom_init(priv);
4033 if (err) {
4034 IWL_ERR(priv, "Unable to init EEPROM\n");
4035 goto out_iounmap;
4036 }
4037 /* MAC Address location in EEPROM same for 3945/4965 */
4038 eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4039 memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4040 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4041 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4042
4043 /***********************
4044 * 5. Setup HW Constants
4045 * ********************/
4046 /* Device-specific setup */
4047 if (iwl3945_hw_set_hw_params(priv)) {
4048 IWL_ERR(priv, "failed to set hw settings\n");
4049 goto out_eeprom_free;
4050 }
4051
4052 /***********************
4053 * 6. Setup priv
4054 * ********************/
4055
4056 err = iwl3945_init_drv(priv);
4057 if (err) {
4058 IWL_ERR(priv, "initializing driver failed\n");
4059 goto out_unset_hw_params;
4060 }
4061
4062 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4063 priv->cfg->name);
4064
4065 /***********************
4066 * 7. Setup Services
4067 * ********************/
4068
4069 spin_lock_irqsave(&priv->lock, flags);
4070 iwl_disable_interrupts(priv);
4071 spin_unlock_irqrestore(&priv->lock, flags);
4072
4073 pci_enable_msi(priv->pci_dev);
4074
4075 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4076 IRQF_SHARED, DRV_NAME, priv);
4077 if (err) {
4078 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4079 goto out_disable_msi;
4080 }
4081
4082 err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4083 if (err) {
4084 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4085 goto out_release_irq;
4086 }
4087
4088 iwl_set_rxon_channel(priv,
4089 &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4090 iwl3945_setup_deferred_work(priv);
4091 iwl3945_setup_rx_handlers(priv);
4092 iwl_power_initialize(priv);
4093
4094 /*********************************
4095 * 8. Setup and Register mac80211
4096 * *******************************/
4097
4098 iwl_enable_interrupts(priv);
4099
4100 err = iwl3945_setup_mac(priv);
4101 if (err)
4102 goto out_remove_sysfs;
4103
4104 err = iwl_dbgfs_register(priv, DRV_NAME);
4105 if (err)
4106 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4107
4108 /* Start monitoring the killswitch */
4109 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4110 2 * HZ);
4111
4112 return 0;
4113
4114 out_remove_sysfs:
4115 destroy_workqueue(priv->workqueue);
4116 priv->workqueue = NULL;
4117 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4118 out_release_irq:
4119 free_irq(priv->pci_dev->irq, priv);
4120 out_disable_msi:
4121 pci_disable_msi(priv->pci_dev);
4122 iwlcore_free_geos(priv);
4123 iwl_free_channel_map(priv);
4124 out_unset_hw_params:
4125 iwl3945_unset_hw_params(priv);
4126 out_eeprom_free:
4127 iwl_eeprom_free(priv);
4128 out_iounmap:
4129 pci_iounmap(pdev, priv->hw_base);
4130 out_pci_release_regions:
4131 pci_release_regions(pdev);
4132 out_pci_disable_device:
4133 pci_set_drvdata(pdev, NULL);
4134 pci_disable_device(pdev);
4135 out_ieee80211_free_hw:
4136 iwl_free_traffic_mem(priv);
4137 ieee80211_free_hw(priv->hw);
4138 out:
4139 return err;
4140 }
4141
4142 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4143 {
4144 struct iwl_priv *priv = pci_get_drvdata(pdev);
4145 unsigned long flags;
4146
4147 if (!priv)
4148 return;
4149
4150 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4151
4152 iwl_dbgfs_unregister(priv);
4153
4154 set_bit(STATUS_EXIT_PENDING, &priv->status);
4155
4156 if (priv->mac80211_registered) {
4157 ieee80211_unregister_hw(priv->hw);
4158 priv->mac80211_registered = 0;
4159 } else {
4160 iwl3945_down(priv);
4161 }
4162
4163 /*
4164 * Make sure device is reset to low power before unloading driver.
4165 * This may be redundant with iwl_down(), but there are paths to
4166 * run iwl_down() without calling apm_ops.stop(), and there are
4167 * paths to avoid running iwl_down() at all before leaving driver.
4168 * This (inexpensive) call *makes sure* device is reset.
4169 */
4170 priv->cfg->ops->lib->apm_ops.stop(priv);
4171
4172 /* make sure we flush any pending irq or
4173 * tasklet for the driver
4174 */
4175 spin_lock_irqsave(&priv->lock, flags);
4176 iwl_disable_interrupts(priv);
4177 spin_unlock_irqrestore(&priv->lock, flags);
4178
4179 iwl_synchronize_irq(priv);
4180
4181 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4182
4183 cancel_delayed_work_sync(&priv->rfkill_poll);
4184
4185 iwl3945_dealloc_ucode_pci(priv);
4186
4187 if (priv->rxq.bd)
4188 iwl3945_rx_queue_free(priv, &priv->rxq);
4189 iwl3945_hw_txq_ctx_free(priv);
4190
4191 iwl3945_unset_hw_params(priv);
4192 iwl_clear_stations_table(priv);
4193
4194 /*netif_stop_queue(dev); */
4195 flush_workqueue(priv->workqueue);
4196
4197 /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4198 * priv->workqueue... so we can't take down the workqueue
4199 * until now... */
4200 destroy_workqueue(priv->workqueue);
4201 priv->workqueue = NULL;
4202 iwl_free_traffic_mem(priv);
4203
4204 free_irq(pdev->irq, priv);
4205 pci_disable_msi(pdev);
4206
4207 pci_iounmap(pdev, priv->hw_base);
4208 pci_release_regions(pdev);
4209 pci_disable_device(pdev);
4210 pci_set_drvdata(pdev, NULL);
4211
4212 iwl_free_channel_map(priv);
4213 iwlcore_free_geos(priv);
4214 kfree(priv->scan);
4215 if (priv->ibss_beacon)
4216 dev_kfree_skb(priv->ibss_beacon);
4217
4218 ieee80211_free_hw(priv->hw);
4219 }
4220
4221
4222 /*****************************************************************************
4223 *
4224 * driver and module entry point
4225 *
4226 *****************************************************************************/
4227
4228 static struct pci_driver iwl3945_driver = {
4229 .name = DRV_NAME,
4230 .id_table = iwl3945_hw_card_ids,
4231 .probe = iwl3945_pci_probe,
4232 .remove = __devexit_p(iwl3945_pci_remove),
4233 #ifdef CONFIG_PM
4234 .suspend = iwl_pci_suspend,
4235 .resume = iwl_pci_resume,
4236 #endif
4237 };
4238
4239 static int __init iwl3945_init(void)
4240 {
4241
4242 int ret;
4243 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4244 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4245
4246 ret = iwl3945_rate_control_register();
4247 if (ret) {
4248 printk(KERN_ERR DRV_NAME
4249 "Unable to register rate control algorithm: %d\n", ret);
4250 return ret;
4251 }
4252
4253 ret = pci_register_driver(&iwl3945_driver);
4254 if (ret) {
4255 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4256 goto error_register;
4257 }
4258
4259 return ret;
4260
4261 error_register:
4262 iwl3945_rate_control_unregister();
4263 return ret;
4264 }
4265
4266 static void __exit iwl3945_exit(void)
4267 {
4268 pci_unregister_driver(&iwl3945_driver);
4269 iwl3945_rate_control_unregister();
4270 }
4271
4272 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4273
4274 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4275 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4276 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4277 MODULE_PARM_DESC(swcrypto,
4278 "using software crypto (default 1 [software])\n");
4279 #ifdef CONFIG_IWLWIFI_DEBUG
4280 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4281 MODULE_PARM_DESC(debug, "debug output mask");
4282 #endif
4283 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4284 int, S_IRUGO);
4285 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4286 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4287 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4288
4289 module_exit(iwl3945_exit);
4290 module_init(iwl3945_init);
Linux kernel - Deliverables
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