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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2008 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/mac80211.h>
44
45 #include <asm/div64.h>
46
47 #include "iwl-eeprom.h"
48 #include "iwl-dev.h"
49 #include "iwl-core.h"
50 #include "iwl-io.h"
51 #include "iwl-helpers.h"
52 #include "iwl-sta.h"
53 #include "iwl-calib.h"
54
55
56 /******************************************************************************
57 *
58 * module boiler plate
59 *
60 ******************************************************************************/
61
62 /*
63 * module name, copyright, version, etc.
64 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
65 */
66
67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
68
69 #ifdef CONFIG_IWLWIFI_DEBUG
70 #define VD "d"
71 #else
72 #define VD
73 #endif
74
75 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
76 #define VS "s"
77 #else
78 #define VS
79 #endif
80
81 #define DRV_VERSION IWLWIFI_VERSION VD VS
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88 MODULE_ALIAS("iwl4965");
89
90 /*************** STATION TABLE MANAGEMENT ****
91 * mac80211 should be examined to determine if sta_info is duplicating
92 * the functionality provided here
93 */
94
95 /**************************************************************/
96
97
98
99 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
100 {
101 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
102
103 if (hw_decrypt)
104 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
105 else
106 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
107
108 }
109
110 /**
111 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
112 * @priv: staging_rxon is compared to active_rxon
113 *
114 * If the RXON structure is changing enough to require a new tune,
115 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
116 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
117 */
118 static int iwl_full_rxon_required(struct iwl_priv *priv)
119 {
120
121 /* These items are only settable from the full RXON command */
122 if (!(iwl_is_associated(priv)) ||
123 compare_ether_addr(priv->staging_rxon.bssid_addr,
124 priv->active_rxon.bssid_addr) ||
125 compare_ether_addr(priv->staging_rxon.node_addr,
126 priv->active_rxon.node_addr) ||
127 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
128 priv->active_rxon.wlap_bssid_addr) ||
129 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
130 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
131 (priv->staging_rxon.air_propagation !=
132 priv->active_rxon.air_propagation) ||
133 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
134 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
135 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
136 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
137 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
138 return 1;
139
140 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
141 * be updated with the RXON_ASSOC command -- however only some
142 * flag transitions are allowed using RXON_ASSOC */
143
144 /* Check if we are not switching bands */
145 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
146 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
147 return 1;
148
149 /* Check if we are switching association toggle */
150 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
151 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
152 return 1;
153
154 return 0;
155 }
156
157 /**
158 * iwl_commit_rxon - commit staging_rxon to hardware
159 *
160 * The RXON command in staging_rxon is committed to the hardware and
161 * the active_rxon structure is updated with the new data. This
162 * function correctly transitions out of the RXON_ASSOC_MSK state if
163 * a HW tune is required based on the RXON structure changes.
164 */
165 static int iwl_commit_rxon(struct iwl_priv *priv)
166 {
167 /* cast away the const for active_rxon in this function */
168 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
169 int ret;
170 bool new_assoc =
171 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
172
173 if (!iwl_is_alive(priv))
174 return -EBUSY;
175
176 /* always get timestamp with Rx frame */
177 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
178 /* allow CTS-to-self if possible. this is relevant only for
179 * 5000, but will not damage 4965 */
180 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
181
182 ret = iwl_agn_check_rxon_cmd(&priv->staging_rxon);
183 if (ret) {
184 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
185 return -EINVAL;
186 }
187
188 /* If we don't need to send a full RXON, we can use
189 * iwl_rxon_assoc_cmd which is used to reconfigure filter
190 * and other flags for the current radio configuration. */
191 if (!iwl_full_rxon_required(priv)) {
192 ret = iwl_send_rxon_assoc(priv);
193 if (ret) {
194 IWL_ERROR("Error setting RXON_ASSOC (%d)\n", ret);
195 return ret;
196 }
197
198 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
199 return 0;
200 }
201
202 /* station table will be cleared */
203 priv->assoc_station_added = 0;
204
205 /* If we are currently associated and the new config requires
206 * an RXON_ASSOC and the new config wants the associated mask enabled,
207 * we must clear the associated from the active configuration
208 * before we apply the new config */
209 if (iwl_is_associated(priv) && new_assoc) {
210 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
211 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
212
213 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
214 sizeof(struct iwl_rxon_cmd),
215 &priv->active_rxon);
216
217 /* If the mask clearing failed then we set
218 * active_rxon back to what it was previously */
219 if (ret) {
220 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
221 IWL_ERROR("Error clearing ASSOC_MSK (%d)\n", ret);
222 return ret;
223 }
224 }
225
226 IWL_DEBUG_INFO("Sending RXON\n"
227 "* with%s RXON_FILTER_ASSOC_MSK\n"
228 "* channel = %d\n"
229 "* bssid = %pM\n",
230 (new_assoc ? "" : "out"),
231 le16_to_cpu(priv->staging_rxon.channel),
232 priv->staging_rxon.bssid_addr);
233
234 iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
235
236 /* Apply the new configuration
237 * RXON unassoc clears the station table in uCode, send it before
238 * we add the bcast station. If assoc bit is set, we will send RXON
239 * after having added the bcast and bssid station.
240 */
241 if (!new_assoc) {
242 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
243 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
244 if (ret) {
245 IWL_ERROR("Error setting new RXON (%d)\n", ret);
246 return ret;
247 }
248 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
249 }
250
251 iwl_clear_stations_table(priv);
252
253 if (!priv->error_recovering)
254 priv->start_calib = 0;
255
256 /* Add the broadcast address so we can send broadcast frames */
257 if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
258 IWL_INVALID_STATION) {
259 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
260 return -EIO;
261 }
262
263 /* If we have set the ASSOC_MSK and we are in BSS mode then
264 * add the IWL_AP_ID to the station rate table */
265 if (new_assoc) {
266 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
267 ret = iwl_rxon_add_station(priv,
268 priv->active_rxon.bssid_addr, 1);
269 if (ret == IWL_INVALID_STATION) {
270 IWL_ERROR("Error adding AP address for TX.\n");
271 return -EIO;
272 }
273 priv->assoc_station_added = 1;
274 if (priv->default_wep_key &&
275 iwl_send_static_wepkey_cmd(priv, 0))
276 IWL_ERROR("Could not send WEP static key.\n");
277 }
278
279 /* Apply the new configuration
280 * RXON assoc doesn't clear the station table in uCode,
281 */
282 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
283 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
284 if (ret) {
285 IWL_ERROR("Error setting new RXON (%d)\n", ret);
286 return ret;
287 }
288 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
289 }
290
291 iwl_init_sensitivity(priv);
292
293 /* If we issue a new RXON command which required a tune then we must
294 * send a new TXPOWER command or we won't be able to Tx any frames */
295 ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
296 if (ret) {
297 IWL_ERROR("Error sending TX power (%d)\n", ret);
298 return ret;
299 }
300
301 return 0;
302 }
303
304 void iwl_update_chain_flags(struct iwl_priv *priv)
305 {
306
307 iwl_set_rxon_chain(priv);
308 iwl_commit_rxon(priv);
309 }
310
311 static int iwl_send_bt_config(struct iwl_priv *priv)
312 {
313 struct iwl_bt_cmd bt_cmd = {
314 .flags = 3,
315 .lead_time = 0xAA,
316 .max_kill = 1,
317 .kill_ack_mask = 0,
318 .kill_cts_mask = 0,
319 };
320
321 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
322 sizeof(struct iwl_bt_cmd), &bt_cmd);
323 }
324
325 static void iwl_clear_free_frames(struct iwl_priv *priv)
326 {
327 struct list_head *element;
328
329 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
330 priv->frames_count);
331
332 while (!list_empty(&priv->free_frames)) {
333 element = priv->free_frames.next;
334 list_del(element);
335 kfree(list_entry(element, struct iwl_frame, list));
336 priv->frames_count--;
337 }
338
339 if (priv->frames_count) {
340 IWL_WARNING("%d frames still in use. Did we lose one?\n",
341 priv->frames_count);
342 priv->frames_count = 0;
343 }
344 }
345
346 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
347 {
348 struct iwl_frame *frame;
349 struct list_head *element;
350 if (list_empty(&priv->free_frames)) {
351 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
352 if (!frame) {
353 IWL_ERROR("Could not allocate frame!\n");
354 return NULL;
355 }
356
357 priv->frames_count++;
358 return frame;
359 }
360
361 element = priv->free_frames.next;
362 list_del(element);
363 return list_entry(element, struct iwl_frame, list);
364 }
365
366 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
367 {
368 memset(frame, 0, sizeof(*frame));
369 list_add(&frame->list, &priv->free_frames);
370 }
371
372 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
373 struct ieee80211_hdr *hdr,
374 int left)
375 {
376 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
377 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
378 (priv->iw_mode != NL80211_IFTYPE_AP)))
379 return 0;
380
381 if (priv->ibss_beacon->len > left)
382 return 0;
383
384 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
385
386 return priv->ibss_beacon->len;
387 }
388
389 static u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
390 {
391 int i;
392 int rate_mask;
393
394 /* Set rate mask*/
395 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
396 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
397 else
398 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
399
400 /* Find lowest valid rate */
401 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
402 i = iwl_rates[i].next_ieee) {
403 if (rate_mask & (1 << i))
404 return iwl_rates[i].plcp;
405 }
406
407 /* No valid rate was found. Assign the lowest one */
408 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
409 return IWL_RATE_1M_PLCP;
410 else
411 return IWL_RATE_6M_PLCP;
412 }
413
414 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
415 struct iwl_frame *frame, u8 rate)
416 {
417 struct iwl_tx_beacon_cmd *tx_beacon_cmd;
418 unsigned int frame_size;
419
420 tx_beacon_cmd = &frame->u.beacon;
421 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
422
423 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
424 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
425
426 frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
427 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
428
429 BUG_ON(frame_size > MAX_MPDU_SIZE);
430 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
431
432 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
433 tx_beacon_cmd->tx.rate_n_flags =
434 iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
435 else
436 tx_beacon_cmd->tx.rate_n_flags =
437 iwl_hw_set_rate_n_flags(rate, 0);
438
439 tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
440 TX_CMD_FLG_TSF_MSK |
441 TX_CMD_FLG_STA_RATE_MSK;
442
443 return sizeof(*tx_beacon_cmd) + frame_size;
444 }
445 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
446 {
447 struct iwl_frame *frame;
448 unsigned int frame_size;
449 int rc;
450 u8 rate;
451
452 frame = iwl_get_free_frame(priv);
453
454 if (!frame) {
455 IWL_ERROR("Could not obtain free frame buffer for beacon "
456 "command.\n");
457 return -ENOMEM;
458 }
459
460 rate = iwl_rate_get_lowest_plcp(priv);
461
462 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
463
464 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
465 &frame->u.cmd[0]);
466
467 iwl_free_frame(priv, frame);
468
469 return rc;
470 }
471
472 /******************************************************************************
473 *
474 * Misc. internal state and helper functions
475 *
476 ******************************************************************************/
477
478 static void iwl_ht_conf(struct iwl_priv *priv,
479 struct ieee80211_bss_conf *bss_conf)
480 {
481 struct ieee80211_sta_ht_cap *ht_conf;
482 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
483 struct ieee80211_sta *sta;
484
485 IWL_DEBUG_MAC80211("enter: \n");
486
487 if (!iwl_conf->is_ht)
488 return;
489
490
491 /*
492 * It is totally wrong to base global information on something
493 * that is valid only when associated, alas, this driver works
494 * that way and I don't know how to fix it.
495 */
496
497 rcu_read_lock();
498 sta = ieee80211_find_sta(priv->hw, priv->bssid);
499 if (!sta) {
500 rcu_read_unlock();
501 return;
502 }
503 ht_conf = &sta->ht_cap;
504
505 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
506 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
507 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
508 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
509
510 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
511 iwl_conf->max_amsdu_size =
512 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
513
514 iwl_conf->supported_chan_width =
515 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
516
517 /*
518 * XXX: The HT configuration needs to be moved into iwl_mac_config()
519 * to be done there correctly.
520 */
521
522 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
523 if (priv->hw->conf.ht.channel_type == NL80211_CHAN_HT40MINUS)
524 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
525 else if(priv->hw->conf.ht.channel_type == NL80211_CHAN_HT40PLUS)
526 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
527
528 /* If no above or below channel supplied disable FAT channel */
529 if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
530 iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
531 iwl_conf->supported_chan_width = 0;
532
533 iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
534
535 memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
536
537 iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
538 iwl_conf->ht_protection =
539 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
540 iwl_conf->non_GF_STA_present =
541 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
542
543 rcu_read_unlock();
544
545 IWL_DEBUG_MAC80211("leave\n");
546 }
547
548 /*
549 * QoS support
550 */
551 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
552 {
553 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
554 return;
555
556 priv->qos_data.def_qos_parm.qos_flags = 0;
557
558 if (priv->qos_data.qos_cap.q_AP.queue_request &&
559 !priv->qos_data.qos_cap.q_AP.txop_request)
560 priv->qos_data.def_qos_parm.qos_flags |=
561 QOS_PARAM_FLG_TXOP_TYPE_MSK;
562 if (priv->qos_data.qos_active)
563 priv->qos_data.def_qos_parm.qos_flags |=
564 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
565
566 if (priv->current_ht_config.is_ht)
567 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
568
569 if (force || iwl_is_associated(priv)) {
570 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
571 priv->qos_data.qos_active,
572 priv->qos_data.def_qos_parm.qos_flags);
573
574 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
575 sizeof(struct iwl_qosparam_cmd),
576 &priv->qos_data.def_qos_parm, NULL);
577 }
578 }
579
580 #define MAX_UCODE_BEACON_INTERVAL 4096
581
582 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
583 {
584 u16 new_val = 0;
585 u16 beacon_factor = 0;
586
587 beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
588 / MAX_UCODE_BEACON_INTERVAL;
589 new_val = beacon_val / beacon_factor;
590
591 return new_val;
592 }
593
594 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
595 {
596 u64 tsf;
597 s32 interval_tm, rem;
598 unsigned long flags;
599 struct ieee80211_conf *conf = NULL;
600 u16 beacon_int = 0;
601
602 conf = ieee80211_get_hw_conf(priv->hw);
603
604 spin_lock_irqsave(&priv->lock, flags);
605 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
606 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
607
608 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
609 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
610 priv->rxon_timing.atim_window = 0;
611 } else {
612 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
613
614 /* TODO: we need to get atim_window from upper stack
615 * for now we set to 0 */
616 priv->rxon_timing.atim_window = 0;
617 }
618
619 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
620
621 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
622 interval_tm = beacon_int * 1024;
623 rem = do_div(tsf, interval_tm);
624 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
625
626 spin_unlock_irqrestore(&priv->lock, flags);
627 IWL_DEBUG_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
628 le16_to_cpu(priv->rxon_timing.beacon_interval),
629 le32_to_cpu(priv->rxon_timing.beacon_init_val),
630 le16_to_cpu(priv->rxon_timing.atim_window));
631 }
632
633 static void iwl_set_flags_for_band(struct iwl_priv *priv,
634 enum ieee80211_band band)
635 {
636 if (band == IEEE80211_BAND_5GHZ) {
637 priv->staging_rxon.flags &=
638 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
639 | RXON_FLG_CCK_MSK);
640 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
641 } else {
642 /* Copied from iwl_post_associate() */
643 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
644 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
645 else
646 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
647
648 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
649 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
650
651 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
652 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
653 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
654 }
655 }
656
657 /*
658 * initialize rxon structure with default values from eeprom
659 */
660 static void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
661 {
662 const struct iwl_channel_info *ch_info;
663
664 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
665
666 switch (mode) {
667 case NL80211_IFTYPE_AP:
668 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
669 break;
670
671 case NL80211_IFTYPE_STATION:
672 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
673 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
674 break;
675
676 case NL80211_IFTYPE_ADHOC:
677 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
678 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
679 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
680 RXON_FILTER_ACCEPT_GRP_MSK;
681 break;
682
683 case NL80211_IFTYPE_MONITOR:
684 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
685 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
686 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
687 break;
688 default:
689 IWL_ERROR("Unsupported interface type %d\n", mode);
690 break;
691 }
692
693 #if 0
694 /* TODO: Figure out when short_preamble would be set and cache from
695 * that */
696 if (!hw_to_local(priv->hw)->short_preamble)
697 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
698 else
699 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
700 #endif
701
702 ch_info = iwl_get_channel_info(priv, priv->band,
703 le16_to_cpu(priv->active_rxon.channel));
704
705 if (!ch_info)
706 ch_info = &priv->channel_info[0];
707
708 /*
709 * in some case A channels are all non IBSS
710 * in this case force B/G channel
711 */
712 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
713 !(is_channel_ibss(ch_info)))
714 ch_info = &priv->channel_info[0];
715
716 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
717 priv->band = ch_info->band;
718
719 iwl_set_flags_for_band(priv, priv->band);
720
721 priv->staging_rxon.ofdm_basic_rates =
722 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
723 priv->staging_rxon.cck_basic_rates =
724 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
725
726 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
727 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
728 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
729 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
730 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
731 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
732 iwl_set_rxon_chain(priv);
733 }
734
735 static int iwl_set_mode(struct iwl_priv *priv, int mode)
736 {
737 iwl_connection_init_rx_config(priv, mode);
738 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
739
740 iwl_clear_stations_table(priv);
741
742 /* dont commit rxon if rf-kill is on*/
743 if (!iwl_is_ready_rf(priv))
744 return -EAGAIN;
745
746 cancel_delayed_work(&priv->scan_check);
747 if (iwl_scan_cancel_timeout(priv, 100)) {
748 IWL_WARNING("Aborted scan still in progress after 100ms\n");
749 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
750 return -EAGAIN;
751 }
752
753 iwl_commit_rxon(priv);
754
755 return 0;
756 }
757
758 static void iwl_set_rate(struct iwl_priv *priv)
759 {
760 const struct ieee80211_supported_band *hw = NULL;
761 struct ieee80211_rate *rate;
762 int i;
763
764 hw = iwl_get_hw_mode(priv, priv->band);
765 if (!hw) {
766 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
767 return;
768 }
769
770 priv->active_rate = 0;
771 priv->active_rate_basic = 0;
772
773 for (i = 0; i < hw->n_bitrates; i++) {
774 rate = &(hw->bitrates[i]);
775 if (rate->hw_value < IWL_RATE_COUNT)
776 priv->active_rate |= (1 << rate->hw_value);
777 }
778
779 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
780 priv->active_rate, priv->active_rate_basic);
781
782 /*
783 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
784 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
785 * OFDM
786 */
787 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
788 priv->staging_rxon.cck_basic_rates =
789 ((priv->active_rate_basic &
790 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
791 else
792 priv->staging_rxon.cck_basic_rates =
793 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
794
795 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
796 priv->staging_rxon.ofdm_basic_rates =
797 ((priv->active_rate_basic &
798 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
799 IWL_FIRST_OFDM_RATE) & 0xFF;
800 else
801 priv->staging_rxon.ofdm_basic_rates =
802 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
803 }
804
805
806 /******************************************************************************
807 *
808 * Generic RX handler implementations
809 *
810 ******************************************************************************/
811 static void iwl_rx_reply_alive(struct iwl_priv *priv,
812 struct iwl_rx_mem_buffer *rxb)
813 {
814 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
815 struct iwl_alive_resp *palive;
816 struct delayed_work *pwork;
817
818 palive = &pkt->u.alive_frame;
819
820 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
821 "0x%01X 0x%01X\n",
822 palive->is_valid, palive->ver_type,
823 palive->ver_subtype);
824
825 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
826 IWL_DEBUG_INFO("Initialization Alive received.\n");
827 memcpy(&priv->card_alive_init,
828 &pkt->u.alive_frame,
829 sizeof(struct iwl_init_alive_resp));
830 pwork = &priv->init_alive_start;
831 } else {
832 IWL_DEBUG_INFO("Runtime Alive received.\n");
833 memcpy(&priv->card_alive, &pkt->u.alive_frame,
834 sizeof(struct iwl_alive_resp));
835 pwork = &priv->alive_start;
836 }
837
838 /* We delay the ALIVE response by 5ms to
839 * give the HW RF Kill time to activate... */
840 if (palive->is_valid == UCODE_VALID_OK)
841 queue_delayed_work(priv->workqueue, pwork,
842 msecs_to_jiffies(5));
843 else
844 IWL_WARNING("uCode did not respond OK.\n");
845 }
846
847 static void iwl_rx_reply_error(struct iwl_priv *priv,
848 struct iwl_rx_mem_buffer *rxb)
849 {
850 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
851
852 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
853 "seq 0x%04X ser 0x%08X\n",
854 le32_to_cpu(pkt->u.err_resp.error_type),
855 get_cmd_string(pkt->u.err_resp.cmd_id),
856 pkt->u.err_resp.cmd_id,
857 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
858 le32_to_cpu(pkt->u.err_resp.error_info));
859 }
860
861 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
862
863 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
864 {
865 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
866 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
867 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
868 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
869 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
870 rxon->channel = csa->channel;
871 priv->staging_rxon.channel = csa->channel;
872 }
873
874 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
875 struct iwl_rx_mem_buffer *rxb)
876 {
877 #ifdef CONFIG_IWLWIFI_DEBUG
878 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
879 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
880 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
881 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
882 #endif
883 }
884
885 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
886 struct iwl_rx_mem_buffer *rxb)
887 {
888 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
889 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
890 "notification for %s:\n",
891 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
892 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
893 }
894
895 static void iwl_bg_beacon_update(struct work_struct *work)
896 {
897 struct iwl_priv *priv =
898 container_of(work, struct iwl_priv, beacon_update);
899 struct sk_buff *beacon;
900
901 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
902 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
903
904 if (!beacon) {
905 IWL_ERROR("update beacon failed\n");
906 return;
907 }
908
909 mutex_lock(&priv->mutex);
910 /* new beacon skb is allocated every time; dispose previous.*/
911 if (priv->ibss_beacon)
912 dev_kfree_skb(priv->ibss_beacon);
913
914 priv->ibss_beacon = beacon;
915 mutex_unlock(&priv->mutex);
916
917 iwl_send_beacon_cmd(priv);
918 }
919
920 /**
921 * iwl_bg_statistics_periodic - Timer callback to queue statistics
922 *
923 * This callback is provided in order to send a statistics request.
924 *
925 * This timer function is continually reset to execute within
926 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
927 * was received. We need to ensure we receive the statistics in order
928 * to update the temperature used for calibrating the TXPOWER.
929 */
930 static void iwl_bg_statistics_periodic(unsigned long data)
931 {
932 struct iwl_priv *priv = (struct iwl_priv *)data;
933
934 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
935 return;
936
937 /* dont send host command if rf-kill is on */
938 if (!iwl_is_ready_rf(priv))
939 return;
940
941 iwl_send_statistics_request(priv, CMD_ASYNC);
942 }
943
944 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
945 struct iwl_rx_mem_buffer *rxb)
946 {
947 #ifdef CONFIG_IWLWIFI_DEBUG
948 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
949 struct iwl4965_beacon_notif *beacon =
950 (struct iwl4965_beacon_notif *)pkt->u.raw;
951 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
952
953 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
954 "tsf %d %d rate %d\n",
955 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
956 beacon->beacon_notify_hdr.failure_frame,
957 le32_to_cpu(beacon->ibss_mgr_status),
958 le32_to_cpu(beacon->high_tsf),
959 le32_to_cpu(beacon->low_tsf), rate);
960 #endif
961
962 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
963 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
964 queue_work(priv->workqueue, &priv->beacon_update);
965 }
966
967 /* Handle notification from uCode that card's power state is changing
968 * due to software, hardware, or critical temperature RFKILL */
969 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
970 struct iwl_rx_mem_buffer *rxb)
971 {
972 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
973 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
974 unsigned long status = priv->status;
975
976 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
977 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
978 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
979
980 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
981 RF_CARD_DISABLED)) {
982
983 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
984 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
985
986 if (!iwl_grab_nic_access(priv)) {
987 iwl_write_direct32(
988 priv, HBUS_TARG_MBX_C,
989 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
990
991 iwl_release_nic_access(priv);
992 }
993
994 if (!(flags & RXON_CARD_DISABLED)) {
995 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
996 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
997 if (!iwl_grab_nic_access(priv)) {
998 iwl_write_direct32(
999 priv, HBUS_TARG_MBX_C,
1000 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1001
1002 iwl_release_nic_access(priv);
1003 }
1004 }
1005
1006 if (flags & RF_CARD_DISABLED) {
1007 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1008 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1009 iwl_read32(priv, CSR_UCODE_DRV_GP1);
1010 if (!iwl_grab_nic_access(priv))
1011 iwl_release_nic_access(priv);
1012 }
1013 }
1014
1015 if (flags & HW_CARD_DISABLED)
1016 set_bit(STATUS_RF_KILL_HW, &priv->status);
1017 else
1018 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1019
1020
1021 if (flags & SW_CARD_DISABLED)
1022 set_bit(STATUS_RF_KILL_SW, &priv->status);
1023 else
1024 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1025
1026 if (!(flags & RXON_CARD_DISABLED))
1027 iwl_scan_cancel(priv);
1028
1029 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1030 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1031 (test_bit(STATUS_RF_KILL_SW, &status) !=
1032 test_bit(STATUS_RF_KILL_SW, &priv->status)))
1033 queue_work(priv->workqueue, &priv->rf_kill);
1034 else
1035 wake_up_interruptible(&priv->wait_command_queue);
1036 }
1037
1038 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
1039 {
1040 int ret;
1041 unsigned long flags;
1042
1043 spin_lock_irqsave(&priv->lock, flags);
1044 ret = iwl_grab_nic_access(priv);
1045 if (ret)
1046 goto err;
1047
1048 if (src == IWL_PWR_SRC_VAUX) {
1049 u32 val;
1050 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
1051 &val);
1052
1053 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
1054 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1055 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1056 ~APMG_PS_CTRL_MSK_PWR_SRC);
1057 } else {
1058 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1059 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1060 ~APMG_PS_CTRL_MSK_PWR_SRC);
1061 }
1062
1063 iwl_release_nic_access(priv);
1064 err:
1065 spin_unlock_irqrestore(&priv->lock, flags);
1066 return ret;
1067 }
1068
1069 /**
1070 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1071 *
1072 * Setup the RX handlers for each of the reply types sent from the uCode
1073 * to the host.
1074 *
1075 * This function chains into the hardware specific files for them to setup
1076 * any hardware specific handlers as well.
1077 */
1078 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
1079 {
1080 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
1081 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1082 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1083 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1084 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1085 iwl_rx_pm_debug_statistics_notif;
1086 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
1087
1088 /*
1089 * The same handler is used for both the REPLY to a discrete
1090 * statistics request from the host as well as for the periodic
1091 * statistics notifications (after received beacons) from the uCode.
1092 */
1093 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
1094 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
1095
1096 iwl_setup_spectrum_handlers(priv);
1097 iwl_setup_rx_scan_handlers(priv);
1098
1099 /* status change handler */
1100 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
1101
1102 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
1103 iwl_rx_missed_beacon_notif;
1104 /* Rx handlers */
1105 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1106 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1107 /* block ack */
1108 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1109 /* Set up hardware specific Rx handlers */
1110 priv->cfg->ops->lib->rx_handler_setup(priv);
1111 }
1112
1113 /**
1114 * iwl_rx_handle - Main entry function for receiving responses from uCode
1115 *
1116 * Uses the priv->rx_handlers callback function array to invoke
1117 * the appropriate handlers, including command responses,
1118 * frame-received notifications, and other notifications.
1119 */
1120 void iwl_rx_handle(struct iwl_priv *priv)
1121 {
1122 struct iwl_rx_mem_buffer *rxb;
1123 struct iwl_rx_packet *pkt;
1124 struct iwl_rx_queue *rxq = &priv->rxq;
1125 u32 r, i;
1126 int reclaim;
1127 unsigned long flags;
1128 u8 fill_rx = 0;
1129 u32 count = 8;
1130
1131 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1132 * buffer that the driver may process (last buffer filled by ucode). */
1133 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1134 i = rxq->read;
1135
1136 /* Rx interrupt, but nothing sent from uCode */
1137 if (i == r)
1138 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1139
1140 if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1141 fill_rx = 1;
1142
1143 while (i != r) {
1144 rxb = rxq->queue[i];
1145
1146 /* If an RXB doesn't have a Rx queue slot associated with it,
1147 * then a bug has been introduced in the queue refilling
1148 * routines -- catch it here */
1149 BUG_ON(rxb == NULL);
1150
1151 rxq->queue[i] = NULL;
1152
1153 dma_sync_single_range_for_cpu(
1154 &priv->pci_dev->dev, rxb->real_dma_addr,
1155 rxb->aligned_dma_addr - rxb->real_dma_addr,
1156 priv->hw_params.rx_buf_size,
1157 PCI_DMA_FROMDEVICE);
1158 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1159
1160 /* Reclaim a command buffer only if this packet is a response
1161 * to a (driver-originated) command.
1162 * If the packet (e.g. Rx frame) originated from uCode,
1163 * there is no command buffer to reclaim.
1164 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1165 * but apparently a few don't get set; catch them here. */
1166 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1167 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1168 (pkt->hdr.cmd != REPLY_RX) &&
1169 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1170 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1171 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1172 (pkt->hdr.cmd != REPLY_TX);
1173
1174 /* Based on type of command response or notification,
1175 * handle those that need handling via function in
1176 * rx_handlers table. See iwl_setup_rx_handlers() */
1177 if (priv->rx_handlers[pkt->hdr.cmd]) {
1178 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
1179 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1180 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1181 } else {
1182 /* No handling needed */
1183 IWL_DEBUG(IWL_DL_RX,
1184 "r %d i %d No handler needed for %s, 0x%02x\n",
1185 r, i, get_cmd_string(pkt->hdr.cmd),
1186 pkt->hdr.cmd);
1187 }
1188
1189 if (reclaim) {
1190 /* Invoke any callbacks, transfer the skb to caller, and
1191 * fire off the (possibly) blocking iwl_send_cmd()
1192 * as we reclaim the driver command queue */
1193 if (rxb && rxb->skb)
1194 iwl_tx_cmd_complete(priv, rxb);
1195 else
1196 IWL_WARNING("Claim null rxb?\n");
1197 }
1198
1199 /* For now we just don't re-use anything. We can tweak this
1200 * later to try and re-use notification packets and SKBs that
1201 * fail to Rx correctly */
1202 if (rxb->skb != NULL) {
1203 priv->alloc_rxb_skb--;
1204 dev_kfree_skb_any(rxb->skb);
1205 rxb->skb = NULL;
1206 }
1207
1208 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1209 priv->hw_params.rx_buf_size + 256,
1210 PCI_DMA_FROMDEVICE);
1211 spin_lock_irqsave(&rxq->lock, flags);
1212 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1213 spin_unlock_irqrestore(&rxq->lock, flags);
1214 i = (i + 1) & RX_QUEUE_MASK;
1215 /* If there are a lot of unused frames,
1216 * restock the Rx queue so ucode wont assert. */
1217 if (fill_rx) {
1218 count++;
1219 if (count >= 8) {
1220 priv->rxq.read = i;
1221 iwl_rx_queue_restock(priv);
1222 count = 0;
1223 }
1224 }
1225 }
1226
1227 /* Backtrack one entry */
1228 priv->rxq.read = i;
1229 iwl_rx_queue_restock(priv);
1230 }
1231
1232 #ifdef CONFIG_IWLWIFI_DEBUG
1233 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1234 {
1235 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1236
1237 IWL_DEBUG_RADIO("RX CONFIG:\n");
1238 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1239 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1240 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1241 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
1242 le32_to_cpu(rxon->filter_flags));
1243 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
1244 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
1245 rxon->ofdm_basic_rates);
1246 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1247 IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
1248 IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1249 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1250 }
1251 #endif
1252
1253 /* call this function to flush any scheduled tasklet */
1254 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1255 {
1256 /* wait to make sure we flush pending tasklet*/
1257 synchronize_irq(priv->pci_dev->irq);
1258 tasklet_kill(&priv->irq_tasklet);
1259 }
1260
1261 /**
1262 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1263 */
1264 static void iwl_irq_handle_error(struct iwl_priv *priv)
1265 {
1266 /* Set the FW error flag -- cleared on iwl_down */
1267 set_bit(STATUS_FW_ERROR, &priv->status);
1268
1269 /* Cancel currently queued command. */
1270 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1271
1272 #ifdef CONFIG_IWLWIFI_DEBUG
1273 if (priv->debug_level & IWL_DL_FW_ERRORS) {
1274 iwl_dump_nic_error_log(priv);
1275 iwl_dump_nic_event_log(priv);
1276 iwl_print_rx_config_cmd(priv);
1277 }
1278 #endif
1279
1280 wake_up_interruptible(&priv->wait_command_queue);
1281
1282 /* Keep the restart process from trying to send host
1283 * commands by clearing the INIT status bit */
1284 clear_bit(STATUS_READY, &priv->status);
1285
1286 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1287 IWL_DEBUG(IWL_DL_FW_ERRORS,
1288 "Restarting adapter due to uCode error.\n");
1289
1290 if (iwl_is_associated(priv)) {
1291 memcpy(&priv->recovery_rxon, &priv->active_rxon,
1292 sizeof(priv->recovery_rxon));
1293 priv->error_recovering = 1;
1294 }
1295 if (priv->cfg->mod_params->restart_fw)
1296 queue_work(priv->workqueue, &priv->restart);
1297 }
1298 }
1299
1300 static void iwl_error_recovery(struct iwl_priv *priv)
1301 {
1302 unsigned long flags;
1303
1304 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1305 sizeof(priv->staging_rxon));
1306 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1307 iwl_commit_rxon(priv);
1308
1309 iwl_rxon_add_station(priv, priv->bssid, 1);
1310
1311 spin_lock_irqsave(&priv->lock, flags);
1312 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1313 priv->error_recovering = 0;
1314 spin_unlock_irqrestore(&priv->lock, flags);
1315 }
1316
1317 static void iwl_irq_tasklet(struct iwl_priv *priv)
1318 {
1319 u32 inta, handled = 0;
1320 u32 inta_fh;
1321 unsigned long flags;
1322 #ifdef CONFIG_IWLWIFI_DEBUG
1323 u32 inta_mask;
1324 #endif
1325
1326 spin_lock_irqsave(&priv->lock, flags);
1327
1328 /* Ack/clear/reset pending uCode interrupts.
1329 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1330 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1331 inta = iwl_read32(priv, CSR_INT);
1332 iwl_write32(priv, CSR_INT, inta);
1333
1334 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1335 * Any new interrupts that happen after this, either while we're
1336 * in this tasklet, or later, will show up in next ISR/tasklet. */
1337 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1338 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1339
1340 #ifdef CONFIG_IWLWIFI_DEBUG
1341 if (priv->debug_level & IWL_DL_ISR) {
1342 /* just for debug */
1343 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1344 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1345 inta, inta_mask, inta_fh);
1346 }
1347 #endif
1348
1349 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1350 * atomic, make sure that inta covers all the interrupts that
1351 * we've discovered, even if FH interrupt came in just after
1352 * reading CSR_INT. */
1353 if (inta_fh & CSR49_FH_INT_RX_MASK)
1354 inta |= CSR_INT_BIT_FH_RX;
1355 if (inta_fh & CSR49_FH_INT_TX_MASK)
1356 inta |= CSR_INT_BIT_FH_TX;
1357
1358 /* Now service all interrupt bits discovered above. */
1359 if (inta & CSR_INT_BIT_HW_ERR) {
1360 IWL_ERROR("Microcode HW error detected. Restarting.\n");
1361
1362 /* Tell the device to stop sending interrupts */
1363 iwl_disable_interrupts(priv);
1364
1365 iwl_irq_handle_error(priv);
1366
1367 handled |= CSR_INT_BIT_HW_ERR;
1368
1369 spin_unlock_irqrestore(&priv->lock, flags);
1370
1371 return;
1372 }
1373
1374 #ifdef CONFIG_IWLWIFI_DEBUG
1375 if (priv->debug_level & (IWL_DL_ISR)) {
1376 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1377 if (inta & CSR_INT_BIT_SCD)
1378 IWL_DEBUG_ISR("Scheduler finished to transmit "
1379 "the frame/frames.\n");
1380
1381 /* Alive notification via Rx interrupt will do the real work */
1382 if (inta & CSR_INT_BIT_ALIVE)
1383 IWL_DEBUG_ISR("Alive interrupt\n");
1384 }
1385 #endif
1386 /* Safely ignore these bits for debug checks below */
1387 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1388
1389 /* HW RF KILL switch toggled */
1390 if (inta & CSR_INT_BIT_RF_KILL) {
1391 int hw_rf_kill = 0;
1392 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1393 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1394 hw_rf_kill = 1;
1395
1396 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
1397 hw_rf_kill ? "disable radio" : "enable radio");
1398
1399 /* driver only loads ucode once setting the interface up.
1400 * the driver as well won't allow loading if RFKILL is set
1401 * therefore no need to restart the driver from this handler
1402 */
1403 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
1404 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1405 if (priv->is_open && !iwl_is_rfkill(priv))
1406 queue_work(priv->workqueue, &priv->up);
1407 }
1408
1409 handled |= CSR_INT_BIT_RF_KILL;
1410 }
1411
1412 /* Chip got too hot and stopped itself */
1413 if (inta & CSR_INT_BIT_CT_KILL) {
1414 IWL_ERROR("Microcode CT kill error detected.\n");
1415 handled |= CSR_INT_BIT_CT_KILL;
1416 }
1417
1418 /* Error detected by uCode */
1419 if (inta & CSR_INT_BIT_SW_ERR) {
1420 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
1421 inta);
1422 iwl_irq_handle_error(priv);
1423 handled |= CSR_INT_BIT_SW_ERR;
1424 }
1425
1426 /* uCode wakes up after power-down sleep */
1427 if (inta & CSR_INT_BIT_WAKEUP) {
1428 IWL_DEBUG_ISR("Wakeup interrupt\n");
1429 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1430 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1431 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1432 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1433 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1434 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1435 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1436
1437 handled |= CSR_INT_BIT_WAKEUP;
1438 }
1439
1440 /* All uCode command responses, including Tx command responses,
1441 * Rx "responses" (frame-received notification), and other
1442 * notifications from uCode come through here*/
1443 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1444 iwl_rx_handle(priv);
1445 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1446 }
1447
1448 if (inta & CSR_INT_BIT_FH_TX) {
1449 IWL_DEBUG_ISR("Tx interrupt\n");
1450 handled |= CSR_INT_BIT_FH_TX;
1451 /* FH finished to write, send event */
1452 priv->ucode_write_complete = 1;
1453 wake_up_interruptible(&priv->wait_command_queue);
1454 }
1455
1456 if (inta & ~handled)
1457 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1458
1459 if (inta & ~CSR_INI_SET_MASK) {
1460 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
1461 inta & ~CSR_INI_SET_MASK);
1462 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
1463 }
1464
1465 /* Re-enable all interrupts */
1466 /* only Re-enable if diabled by irq */
1467 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1468 iwl_enable_interrupts(priv);
1469
1470 #ifdef CONFIG_IWLWIFI_DEBUG
1471 if (priv->debug_level & (IWL_DL_ISR)) {
1472 inta = iwl_read32(priv, CSR_INT);
1473 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1474 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1475 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1476 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1477 }
1478 #endif
1479 spin_unlock_irqrestore(&priv->lock, flags);
1480 }
1481
1482 static irqreturn_t iwl_isr(int irq, void *data)
1483 {
1484 struct iwl_priv *priv = data;
1485 u32 inta, inta_mask;
1486 u32 inta_fh;
1487 if (!priv)
1488 return IRQ_NONE;
1489
1490 spin_lock(&priv->lock);
1491
1492 /* Disable (but don't clear!) interrupts here to avoid
1493 * back-to-back ISRs and sporadic interrupts from our NIC.
1494 * If we have something to service, the tasklet will re-enable ints.
1495 * If we *don't* have something, we'll re-enable before leaving here. */
1496 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1497 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1498
1499 /* Discover which interrupts are active/pending */
1500 inta = iwl_read32(priv, CSR_INT);
1501 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1502
1503 /* Ignore interrupt if there's nothing in NIC to service.
1504 * This may be due to IRQ shared with another device,
1505 * or due to sporadic interrupts thrown from our NIC. */
1506 if (!inta && !inta_fh) {
1507 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
1508 goto none;
1509 }
1510
1511 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1512 /* Hardware disappeared. It might have already raised
1513 * an interrupt */
1514 IWL_WARNING("HARDWARE GONE?? INTA == 0x%08x\n", inta);
1515 goto unplugged;
1516 }
1517
1518 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1519 inta, inta_mask, inta_fh);
1520
1521 inta &= ~CSR_INT_BIT_SCD;
1522
1523 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1524 if (likely(inta || inta_fh))
1525 tasklet_schedule(&priv->irq_tasklet);
1526
1527 unplugged:
1528 spin_unlock(&priv->lock);
1529 return IRQ_HANDLED;
1530
1531 none:
1532 /* re-enable interrupts here since we don't have anything to service. */
1533 /* only Re-enable if diabled by irq */
1534 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1535 iwl_enable_interrupts(priv);
1536 spin_unlock(&priv->lock);
1537 return IRQ_NONE;
1538 }
1539
1540 /******************************************************************************
1541 *
1542 * uCode download functions
1543 *
1544 ******************************************************************************/
1545
1546 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1547 {
1548 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1549 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1550 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1551 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1552 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1553 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1554 }
1555
1556 static void iwl_nic_start(struct iwl_priv *priv)
1557 {
1558 /* Remove all resets to allow NIC to operate */
1559 iwl_write32(priv, CSR_RESET, 0);
1560 }
1561
1562
1563 /**
1564 * iwl_read_ucode - Read uCode images from disk file.
1565 *
1566 * Copy into buffers for card to fetch via bus-mastering
1567 */
1568 static int iwl_read_ucode(struct iwl_priv *priv)
1569 {
1570 struct iwl_ucode *ucode;
1571 int ret = -EINVAL, index;
1572 const struct firmware *ucode_raw;
1573 const char *name_pre = priv->cfg->fw_name_pre;
1574 const unsigned int api_max = priv->cfg->ucode_api_max;
1575 const unsigned int api_min = priv->cfg->ucode_api_min;
1576 char buf[25];
1577 u8 *src;
1578 size_t len;
1579 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1580
1581 /* Ask kernel firmware_class module to get the boot firmware off disk.
1582 * request_firmware() is synchronous, file is in memory on return. */
1583 for (index = api_max; index >= api_min; index--) {
1584 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1585 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1586 if (ret < 0) {
1587 IWL_ERROR("%s firmware file req failed: Reason %d\n",
1588 buf, ret);
1589 if (ret == -ENOENT)
1590 continue;
1591 else
1592 goto error;
1593 } else {
1594 if (index < api_max)
1595 IWL_ERROR("Loaded firmware %s, which is deprecated. Please use API v%u instead.\n",
1596 buf, api_max);
1597 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
1598 buf, ucode_raw->size);
1599 break;
1600 }
1601 }
1602
1603 if (ret < 0)
1604 goto error;
1605
1606 /* Make sure that we got at least our header! */
1607 if (ucode_raw->size < sizeof(*ucode)) {
1608 IWL_ERROR("File size way too small!\n");
1609 ret = -EINVAL;
1610 goto err_release;
1611 }
1612
1613 /* Data from ucode file: header followed by uCode images */
1614 ucode = (void *)ucode_raw->data;
1615
1616 priv->ucode_ver = le32_to_cpu(ucode->ver);
1617 api_ver = IWL_UCODE_API(priv->ucode_ver);
1618 inst_size = le32_to_cpu(ucode->inst_size);
1619 data_size = le32_to_cpu(ucode->data_size);
1620 init_size = le32_to_cpu(ucode->init_size);
1621 init_data_size = le32_to_cpu(ucode->init_data_size);
1622 boot_size = le32_to_cpu(ucode->boot_size);
1623
1624 /* api_ver should match the api version forming part of the
1625 * firmware filename ... but we don't check for that and only rely
1626 * on the API version read from firware header from here on forward */
1627
1628 if (api_ver < api_min || api_ver > api_max) {
1629 IWL_ERROR("Driver unable to support your firmware API. "
1630 "Driver supports v%u, firmware is v%u.\n",
1631 api_max, api_ver);
1632 priv->ucode_ver = 0;
1633 ret = -EINVAL;
1634 goto err_release;
1635 }
1636 if (api_ver != api_max)
1637 IWL_ERROR("Firmware has old API version. Expected v%u, "
1638 "got v%u. New firmware can be obtained "
1639 "from http://www.intellinuxwireless.org.\n",
1640 api_max, api_ver);
1641
1642 printk(KERN_INFO DRV_NAME " loaded firmware version %u.%u.%u.%u\n",
1643 IWL_UCODE_MAJOR(priv->ucode_ver),
1644 IWL_UCODE_MINOR(priv->ucode_ver),
1645 IWL_UCODE_API(priv->ucode_ver),
1646 IWL_UCODE_SERIAL(priv->ucode_ver));
1647
1648 IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
1649 priv->ucode_ver);
1650 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
1651 inst_size);
1652 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
1653 data_size);
1654 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
1655 init_size);
1656 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
1657 init_data_size);
1658 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
1659 boot_size);
1660
1661 /* Verify size of file vs. image size info in file's header */
1662 if (ucode_raw->size < sizeof(*ucode) +
1663 inst_size + data_size + init_size +
1664 init_data_size + boot_size) {
1665
1666 IWL_DEBUG_INFO("uCode file size %d too small\n",
1667 (int)ucode_raw->size);
1668 ret = -EINVAL;
1669 goto err_release;
1670 }
1671
1672 /* Verify that uCode images will fit in card's SRAM */
1673 if (inst_size > priv->hw_params.max_inst_size) {
1674 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
1675 inst_size);
1676 ret = -EINVAL;
1677 goto err_release;
1678 }
1679
1680 if (data_size > priv->hw_params.max_data_size) {
1681 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
1682 data_size);
1683 ret = -EINVAL;
1684 goto err_release;
1685 }
1686 if (init_size > priv->hw_params.max_inst_size) {
1687 IWL_DEBUG_INFO
1688 ("uCode init instr len %d too large to fit in\n",
1689 init_size);
1690 ret = -EINVAL;
1691 goto err_release;
1692 }
1693 if (init_data_size > priv->hw_params.max_data_size) {
1694 IWL_DEBUG_INFO
1695 ("uCode init data len %d too large to fit in\n",
1696 init_data_size);
1697 ret = -EINVAL;
1698 goto err_release;
1699 }
1700 if (boot_size > priv->hw_params.max_bsm_size) {
1701 IWL_DEBUG_INFO
1702 ("uCode boot instr len %d too large to fit in\n",
1703 boot_size);
1704 ret = -EINVAL;
1705 goto err_release;
1706 }
1707
1708 /* Allocate ucode buffers for card's bus-master loading ... */
1709
1710 /* Runtime instructions and 2 copies of data:
1711 * 1) unmodified from disk
1712 * 2) backup cache for save/restore during power-downs */
1713 priv->ucode_code.len = inst_size;
1714 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1715
1716 priv->ucode_data.len = data_size;
1717 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1718
1719 priv->ucode_data_backup.len = data_size;
1720 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1721
1722 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1723 !priv->ucode_data_backup.v_addr)
1724 goto err_pci_alloc;
1725
1726 /* Initialization instructions and data */
1727 if (init_size && init_data_size) {
1728 priv->ucode_init.len = init_size;
1729 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1730
1731 priv->ucode_init_data.len = init_data_size;
1732 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1733
1734 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1735 goto err_pci_alloc;
1736 }
1737
1738 /* Bootstrap (instructions only, no data) */
1739 if (boot_size) {
1740 priv->ucode_boot.len = boot_size;
1741 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1742
1743 if (!priv->ucode_boot.v_addr)
1744 goto err_pci_alloc;
1745 }
1746
1747 /* Copy images into buffers for card's bus-master reads ... */
1748
1749 /* Runtime instructions (first block of data in file) */
1750 src = &ucode->data[0];
1751 len = priv->ucode_code.len;
1752 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
1753 memcpy(priv->ucode_code.v_addr, src, len);
1754 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1755 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1756
1757 /* Runtime data (2nd block)
1758 * NOTE: Copy into backup buffer will be done in iwl_up() */
1759 src = &ucode->data[inst_size];
1760 len = priv->ucode_data.len;
1761 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
1762 memcpy(priv->ucode_data.v_addr, src, len);
1763 memcpy(priv->ucode_data_backup.v_addr, src, len);
1764
1765 /* Initialization instructions (3rd block) */
1766 if (init_size) {
1767 src = &ucode->data[inst_size + data_size];
1768 len = priv->ucode_init.len;
1769 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
1770 len);
1771 memcpy(priv->ucode_init.v_addr, src, len);
1772 }
1773
1774 /* Initialization data (4th block) */
1775 if (init_data_size) {
1776 src = &ucode->data[inst_size + data_size + init_size];
1777 len = priv->ucode_init_data.len;
1778 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
1779 len);
1780 memcpy(priv->ucode_init_data.v_addr, src, len);
1781 }
1782
1783 /* Bootstrap instructions (5th block) */
1784 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1785 len = priv->ucode_boot.len;
1786 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
1787 memcpy(priv->ucode_boot.v_addr, src, len);
1788
1789 /* We have our copies now, allow OS release its copies */
1790 release_firmware(ucode_raw);
1791 return 0;
1792
1793 err_pci_alloc:
1794 IWL_ERROR("failed to allocate pci memory\n");
1795 ret = -ENOMEM;
1796 iwl_dealloc_ucode_pci(priv);
1797
1798 err_release:
1799 release_firmware(ucode_raw);
1800
1801 error:
1802 return ret;
1803 }
1804
1805 /* temporary */
1806 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1807 struct sk_buff *skb);
1808
1809 /**
1810 * iwl_alive_start - called after REPLY_ALIVE notification received
1811 * from protocol/runtime uCode (initialization uCode's
1812 * Alive gets handled by iwl_init_alive_start()).
1813 */
1814 static void iwl_alive_start(struct iwl_priv *priv)
1815 {
1816 int ret = 0;
1817
1818 IWL_DEBUG_INFO("Runtime Alive received.\n");
1819
1820 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1821 /* We had an error bringing up the hardware, so take it
1822 * all the way back down so we can try again */
1823 IWL_DEBUG_INFO("Alive failed.\n");
1824 goto restart;
1825 }
1826
1827 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1828 * This is a paranoid check, because we would not have gotten the
1829 * "runtime" alive if code weren't properly loaded. */
1830 if (iwl_verify_ucode(priv)) {
1831 /* Runtime instruction load was bad;
1832 * take it all the way back down so we can try again */
1833 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
1834 goto restart;
1835 }
1836
1837 iwl_clear_stations_table(priv);
1838 ret = priv->cfg->ops->lib->alive_notify(priv);
1839 if (ret) {
1840 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
1841 ret);
1842 goto restart;
1843 }
1844
1845 /* After the ALIVE response, we can send host commands to the uCode */
1846 set_bit(STATUS_ALIVE, &priv->status);
1847
1848 if (iwl_is_rfkill(priv))
1849 return;
1850
1851 ieee80211_wake_queues(priv->hw);
1852
1853 priv->active_rate = priv->rates_mask;
1854 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1855
1856 if (iwl_is_associated(priv)) {
1857 struct iwl_rxon_cmd *active_rxon =
1858 (struct iwl_rxon_cmd *)&priv->active_rxon;
1859
1860 memcpy(&priv->staging_rxon, &priv->active_rxon,
1861 sizeof(priv->staging_rxon));
1862 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1863 } else {
1864 /* Initialize our rx_config data */
1865 iwl_connection_init_rx_config(priv, priv->iw_mode);
1866 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1867 }
1868
1869 /* Configure Bluetooth device coexistence support */
1870 iwl_send_bt_config(priv);
1871
1872 iwl_reset_run_time_calib(priv);
1873
1874 /* Configure the adapter for unassociated operation */
1875 iwl_commit_rxon(priv);
1876
1877 /* At this point, the NIC is initialized and operational */
1878 iwl_rf_kill_ct_config(priv);
1879
1880 iwl_leds_register(priv);
1881
1882 IWL_DEBUG_INFO("ALIVE processing complete.\n");
1883 set_bit(STATUS_READY, &priv->status);
1884 wake_up_interruptible(&priv->wait_command_queue);
1885
1886 if (priv->error_recovering)
1887 iwl_error_recovery(priv);
1888
1889 iwl_power_update_mode(priv, 1);
1890
1891 /* reassociate for ADHOC mode */
1892 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1893 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1894 priv->vif);
1895 if (beacon)
1896 iwl_mac_beacon_update(priv->hw, beacon);
1897 }
1898
1899
1900 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1901 iwl_set_mode(priv, priv->iw_mode);
1902
1903 return;
1904
1905 restart:
1906 queue_work(priv->workqueue, &priv->restart);
1907 }
1908
1909 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1910
1911 static void __iwl_down(struct iwl_priv *priv)
1912 {
1913 unsigned long flags;
1914 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1915
1916 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
1917
1918 if (!exit_pending)
1919 set_bit(STATUS_EXIT_PENDING, &priv->status);
1920
1921 iwl_leds_unregister(priv);
1922
1923 iwl_clear_stations_table(priv);
1924
1925 /* Unblock any waiting calls */
1926 wake_up_interruptible_all(&priv->wait_command_queue);
1927
1928 /* Wipe out the EXIT_PENDING status bit if we are not actually
1929 * exiting the module */
1930 if (!exit_pending)
1931 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1932
1933 /* stop and reset the on-board processor */
1934 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1935
1936 /* tell the device to stop sending interrupts */
1937 spin_lock_irqsave(&priv->lock, flags);
1938 iwl_disable_interrupts(priv);
1939 spin_unlock_irqrestore(&priv->lock, flags);
1940 iwl_synchronize_irq(priv);
1941
1942 if (priv->mac80211_registered)
1943 ieee80211_stop_queues(priv->hw);
1944
1945 /* If we have not previously called iwl_init() then
1946 * clear all bits but the RF Kill and SUSPEND bits and return */
1947 if (!iwl_is_init(priv)) {
1948 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1949 STATUS_RF_KILL_HW |
1950 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1951 STATUS_RF_KILL_SW |
1952 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1953 STATUS_GEO_CONFIGURED |
1954 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1955 STATUS_IN_SUSPEND |
1956 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1957 STATUS_EXIT_PENDING;
1958 goto exit;
1959 }
1960
1961 /* ...otherwise clear out all the status bits but the RF Kill and
1962 * SUSPEND bits and continue taking the NIC down. */
1963 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1964 STATUS_RF_KILL_HW |
1965 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1966 STATUS_RF_KILL_SW |
1967 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1968 STATUS_GEO_CONFIGURED |
1969 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1970 STATUS_IN_SUSPEND |
1971 test_bit(STATUS_FW_ERROR, &priv->status) <<
1972 STATUS_FW_ERROR |
1973 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1974 STATUS_EXIT_PENDING;
1975
1976 spin_lock_irqsave(&priv->lock, flags);
1977 iwl_clear_bit(priv, CSR_GP_CNTRL,
1978 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1979 spin_unlock_irqrestore(&priv->lock, flags);
1980
1981 iwl_txq_ctx_stop(priv);
1982 iwl_rxq_stop(priv);
1983
1984 spin_lock_irqsave(&priv->lock, flags);
1985 if (!iwl_grab_nic_access(priv)) {
1986 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1987 APMG_CLK_VAL_DMA_CLK_RQT);
1988 iwl_release_nic_access(priv);
1989 }
1990 spin_unlock_irqrestore(&priv->lock, flags);
1991
1992 udelay(5);
1993
1994 /* FIXME: apm_ops.suspend(priv) */
1995 if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1996 priv->cfg->ops->lib->apm_ops.stop(priv);
1997 else
1998 priv->cfg->ops->lib->apm_ops.reset(priv);
1999 exit:
2000 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2001
2002 if (priv->ibss_beacon)
2003 dev_kfree_skb(priv->ibss_beacon);
2004 priv->ibss_beacon = NULL;
2005
2006 /* clear out any free frames */
2007 iwl_clear_free_frames(priv);
2008 }
2009
2010 static void iwl_down(struct iwl_priv *priv)
2011 {
2012 mutex_lock(&priv->mutex);
2013 __iwl_down(priv);
2014 mutex_unlock(&priv->mutex);
2015
2016 iwl_cancel_deferred_work(priv);
2017 }
2018
2019 #define MAX_HW_RESTARTS 5
2020
2021 static int __iwl_up(struct iwl_priv *priv)
2022 {
2023 int i;
2024 int ret;
2025
2026 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2027 IWL_WARNING("Exit pending; will not bring the NIC up\n");
2028 return -EIO;
2029 }
2030
2031 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2032 IWL_ERROR("ucode not available for device bringup\n");
2033 return -EIO;
2034 }
2035
2036 /* If platform's RF_KILL switch is NOT set to KILL */
2037 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2038 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2039 else
2040 set_bit(STATUS_RF_KILL_HW, &priv->status);
2041
2042 if (iwl_is_rfkill(priv)) {
2043 iwl_enable_interrupts(priv);
2044 IWL_WARNING("Radio disabled by %s RF Kill switch\n",
2045 test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
2046 return 0;
2047 }
2048
2049 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2050
2051 ret = iwl_hw_nic_init(priv);
2052 if (ret) {
2053 IWL_ERROR("Unable to init nic\n");
2054 return ret;
2055 }
2056
2057 /* make sure rfkill handshake bits are cleared */
2058 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2059 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2060 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2061
2062 /* clear (again), then enable host interrupts */
2063 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2064 iwl_enable_interrupts(priv);
2065
2066 /* really make sure rfkill handshake bits are cleared */
2067 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2068 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2069
2070 /* Copy original ucode data image from disk into backup cache.
2071 * This will be used to initialize the on-board processor's
2072 * data SRAM for a clean start when the runtime program first loads. */
2073 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2074 priv->ucode_data.len);
2075
2076 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2077
2078 iwl_clear_stations_table(priv);
2079
2080 /* load bootstrap state machine,
2081 * load bootstrap program into processor's memory,
2082 * prepare to load the "initialize" uCode */
2083 ret = priv->cfg->ops->lib->load_ucode(priv);
2084
2085 if (ret) {
2086 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
2087 continue;
2088 }
2089
2090 /* Clear out the uCode error bit if it is set */
2091 clear_bit(STATUS_FW_ERROR, &priv->status);
2092
2093 /* start card; "initialize" will load runtime ucode */
2094 iwl_nic_start(priv);
2095
2096 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
2097
2098 return 0;
2099 }
2100
2101 set_bit(STATUS_EXIT_PENDING, &priv->status);
2102 __iwl_down(priv);
2103 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2104
2105 /* tried to restart and config the device for as long as our
2106 * patience could withstand */
2107 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
2108 return -EIO;
2109 }
2110
2111
2112 /*****************************************************************************
2113 *
2114 * Workqueue callbacks
2115 *
2116 *****************************************************************************/
2117
2118 static void iwl_bg_init_alive_start(struct work_struct *data)
2119 {
2120 struct iwl_priv *priv =
2121 container_of(data, struct iwl_priv, init_alive_start.work);
2122
2123 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2124 return;
2125
2126 mutex_lock(&priv->mutex);
2127 priv->cfg->ops->lib->init_alive_start(priv);
2128 mutex_unlock(&priv->mutex);
2129 }
2130
2131 static void iwl_bg_alive_start(struct work_struct *data)
2132 {
2133 struct iwl_priv *priv =
2134 container_of(data, struct iwl_priv, alive_start.work);
2135
2136 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2137 return;
2138
2139 mutex_lock(&priv->mutex);
2140 iwl_alive_start(priv);
2141 mutex_unlock(&priv->mutex);
2142 }
2143
2144 static void iwl_bg_rf_kill(struct work_struct *work)
2145 {
2146 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
2147
2148 wake_up_interruptible(&priv->wait_command_queue);
2149
2150 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2151 return;
2152
2153 mutex_lock(&priv->mutex);
2154
2155 if (!iwl_is_rfkill(priv)) {
2156 IWL_DEBUG(IWL_DL_RF_KILL,
2157 "HW and/or SW RF Kill no longer active, restarting "
2158 "device\n");
2159 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
2160 queue_work(priv->workqueue, &priv->restart);
2161 } else {
2162 /* make sure mac80211 stop sending Tx frame */
2163 if (priv->mac80211_registered)
2164 ieee80211_stop_queues(priv->hw);
2165
2166 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2167 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2168 "disabled by SW switch\n");
2169 else
2170 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
2171 "Kill switch must be turned off for "
2172 "wireless networking to work.\n");
2173 }
2174 mutex_unlock(&priv->mutex);
2175 iwl_rfkill_set_hw_state(priv);
2176 }
2177
2178 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2179 {
2180 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2181 run_time_calib_work);
2182
2183 mutex_lock(&priv->mutex);
2184
2185 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2186 test_bit(STATUS_SCANNING, &priv->status)) {
2187 mutex_unlock(&priv->mutex);
2188 return;
2189 }
2190
2191 if (priv->start_calib) {
2192 iwl_chain_noise_calibration(priv, &priv->statistics);
2193
2194 iwl_sensitivity_calibration(priv, &priv->statistics);
2195 }
2196
2197 mutex_unlock(&priv->mutex);
2198 return;
2199 }
2200
2201 static void iwl_bg_up(struct work_struct *data)
2202 {
2203 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2204
2205 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2206 return;
2207
2208 mutex_lock(&priv->mutex);
2209 __iwl_up(priv);
2210 mutex_unlock(&priv->mutex);
2211 iwl_rfkill_set_hw_state(priv);
2212 }
2213
2214 static void iwl_bg_restart(struct work_struct *data)
2215 {
2216 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2217
2218 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2219 return;
2220
2221 iwl_down(priv);
2222 queue_work(priv->workqueue, &priv->up);
2223 }
2224
2225 static void iwl_bg_rx_replenish(struct work_struct *data)
2226 {
2227 struct iwl_priv *priv =
2228 container_of(data, struct iwl_priv, rx_replenish);
2229
2230 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2231 return;
2232
2233 mutex_lock(&priv->mutex);
2234 iwl_rx_replenish(priv);
2235 mutex_unlock(&priv->mutex);
2236 }
2237
2238 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2239
2240 static void iwl_post_associate(struct iwl_priv *priv)
2241 {
2242 struct ieee80211_conf *conf = NULL;
2243 int ret = 0;
2244 unsigned long flags;
2245
2246 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2247 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
2248 return;
2249 }
2250
2251 IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
2252 priv->assoc_id, priv->active_rxon.bssid_addr);
2253
2254
2255 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2256 return;
2257
2258
2259 if (!priv->vif || !priv->is_open)
2260 return;
2261
2262 iwl_power_cancel_timeout(priv);
2263 iwl_scan_cancel_timeout(priv, 200);
2264
2265 conf = ieee80211_get_hw_conf(priv->hw);
2266
2267 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2268 iwl_commit_rxon(priv);
2269
2270 iwl_setup_rxon_timing(priv);
2271 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2272 sizeof(priv->rxon_timing), &priv->rxon_timing);
2273 if (ret)
2274 IWL_WARNING("REPLY_RXON_TIMING failed - "
2275 "Attempting to continue.\n");
2276
2277 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2278
2279 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2280
2281 iwl_set_rxon_chain(priv);
2282 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2283
2284 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
2285 priv->assoc_id, priv->beacon_int);
2286
2287 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2288 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2289 else
2290 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2291
2292 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2293 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2294 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2295 else
2296 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2297
2298 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2299 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2300
2301 }
2302
2303 iwl_commit_rxon(priv);
2304
2305 switch (priv->iw_mode) {
2306 case NL80211_IFTYPE_STATION:
2307 break;
2308
2309 case NL80211_IFTYPE_ADHOC:
2310
2311 /* assume default assoc id */
2312 priv->assoc_id = 1;
2313
2314 iwl_rxon_add_station(priv, priv->bssid, 0);
2315 iwl_send_beacon_cmd(priv);
2316
2317 break;
2318
2319 default:
2320 IWL_ERROR("%s Should not be called in %d mode\n",
2321 __func__, priv->iw_mode);
2322 break;
2323 }
2324
2325 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2326 priv->assoc_station_added = 1;
2327
2328 spin_lock_irqsave(&priv->lock, flags);
2329 iwl_activate_qos(priv, 0);
2330 spin_unlock_irqrestore(&priv->lock, flags);
2331
2332 /* the chain noise calibration will enabled PM upon completion
2333 * If chain noise has already been run, then we need to enable
2334 * power management here */
2335 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2336 iwl_power_enable_management(priv);
2337
2338 /* Enable Rx differential gain and sensitivity calibrations */
2339 iwl_chain_noise_reset(priv);
2340 priv->start_calib = 1;
2341
2342 }
2343
2344 /*****************************************************************************
2345 *
2346 * mac80211 entry point functions
2347 *
2348 *****************************************************************************/
2349
2350 #define UCODE_READY_TIMEOUT (4 * HZ)
2351
2352 static int iwl_mac_start(struct ieee80211_hw *hw)
2353 {
2354 struct iwl_priv *priv = hw->priv;
2355 int ret;
2356 u16 pci_cmd;
2357
2358 IWL_DEBUG_MAC80211("enter\n");
2359
2360 if (pci_enable_device(priv->pci_dev)) {
2361 IWL_ERROR("Fail to pci_enable_device\n");
2362 return -ENODEV;
2363 }
2364 pci_restore_state(priv->pci_dev);
2365 pci_enable_msi(priv->pci_dev);
2366
2367 /* enable interrupts if needed: hw bug w/a */
2368 pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2369 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2370 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2371 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2372 }
2373
2374 ret = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
2375 DRV_NAME, priv);
2376 if (ret) {
2377 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
2378 goto out_disable_msi;
2379 }
2380
2381 /* we should be verifying the device is ready to be opened */
2382 mutex_lock(&priv->mutex);
2383
2384 memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2385 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2386 * ucode filename and max sizes are card-specific. */
2387
2388 if (!priv->ucode_code.len) {
2389 ret = iwl_read_ucode(priv);
2390 if (ret) {
2391 IWL_ERROR("Could not read microcode: %d\n", ret);
2392 mutex_unlock(&priv->mutex);
2393 goto out_release_irq;
2394 }
2395 }
2396
2397 ret = __iwl_up(priv);
2398
2399 mutex_unlock(&priv->mutex);
2400
2401 iwl_rfkill_set_hw_state(priv);
2402
2403 if (ret)
2404 goto out_release_irq;
2405
2406 if (iwl_is_rfkill(priv))
2407 goto out;
2408
2409 IWL_DEBUG_INFO("Start UP work done.\n");
2410
2411 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2412 return 0;
2413
2414 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2415 * mac80211 will not be run successfully. */
2416 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2417 test_bit(STATUS_READY, &priv->status),
2418 UCODE_READY_TIMEOUT);
2419 if (!ret) {
2420 if (!test_bit(STATUS_READY, &priv->status)) {
2421 IWL_ERROR("START_ALIVE timeout after %dms.\n",
2422 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2423 ret = -ETIMEDOUT;
2424 goto out_release_irq;
2425 }
2426 }
2427
2428 out:
2429 priv->is_open = 1;
2430 IWL_DEBUG_MAC80211("leave\n");
2431 return 0;
2432
2433 out_release_irq:
2434 free_irq(priv->pci_dev->irq, priv);
2435 out_disable_msi:
2436 pci_disable_msi(priv->pci_dev);
2437 pci_disable_device(priv->pci_dev);
2438 priv->is_open = 0;
2439 IWL_DEBUG_MAC80211("leave - failed\n");
2440 return ret;
2441 }
2442
2443 static void iwl_mac_stop(struct ieee80211_hw *hw)
2444 {
2445 struct iwl_priv *priv = hw->priv;
2446
2447 IWL_DEBUG_MAC80211("enter\n");
2448
2449 if (!priv->is_open) {
2450 IWL_DEBUG_MAC80211("leave - skip\n");
2451 return;
2452 }
2453
2454 priv->is_open = 0;
2455
2456 if (iwl_is_ready_rf(priv)) {
2457 /* stop mac, cancel any scan request and clear
2458 * RXON_FILTER_ASSOC_MSK BIT
2459 */
2460 mutex_lock(&priv->mutex);
2461 iwl_scan_cancel_timeout(priv, 100);
2462 mutex_unlock(&priv->mutex);
2463 }
2464
2465 iwl_down(priv);
2466
2467 flush_workqueue(priv->workqueue);
2468 free_irq(priv->pci_dev->irq, priv);
2469 pci_disable_msi(priv->pci_dev);
2470 pci_save_state(priv->pci_dev);
2471 pci_disable_device(priv->pci_dev);
2472
2473 IWL_DEBUG_MAC80211("leave\n");
2474 }
2475
2476 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2477 {
2478 struct iwl_priv *priv = hw->priv;
2479
2480 IWL_DEBUG_MACDUMP("enter\n");
2481
2482 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2483 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2484
2485 if (iwl_tx_skb(priv, skb))
2486 dev_kfree_skb_any(skb);
2487
2488 IWL_DEBUG_MACDUMP("leave\n");
2489 return NETDEV_TX_OK;
2490 }
2491
2492 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2493 struct ieee80211_if_init_conf *conf)
2494 {
2495 struct iwl_priv *priv = hw->priv;
2496 unsigned long flags;
2497
2498 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
2499
2500 if (priv->vif) {
2501 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
2502 return -EOPNOTSUPP;
2503 }
2504
2505 spin_lock_irqsave(&priv->lock, flags);
2506 priv->vif = conf->vif;
2507 priv->iw_mode = conf->type;
2508
2509 spin_unlock_irqrestore(&priv->lock, flags);
2510
2511 mutex_lock(&priv->mutex);
2512
2513 if (conf->mac_addr) {
2514 IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
2515 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2516 }
2517
2518 if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2519 /* we are not ready, will run again when ready */
2520 set_bit(STATUS_MODE_PENDING, &priv->status);
2521
2522 mutex_unlock(&priv->mutex);
2523
2524 IWL_DEBUG_MAC80211("leave\n");
2525 return 0;
2526 }
2527
2528 /**
2529 * iwl_mac_config - mac80211 config callback
2530 *
2531 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2532 * be set inappropriately and the driver currently sets the hardware up to
2533 * use it whenever needed.
2534 */
2535 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2536 {
2537 struct iwl_priv *priv = hw->priv;
2538 const struct iwl_channel_info *ch_info;
2539 struct ieee80211_conf *conf = &hw->conf;
2540 unsigned long flags;
2541 int ret = 0;
2542 u16 channel;
2543
2544 mutex_lock(&priv->mutex);
2545 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
2546
2547 priv->current_ht_config.is_ht = conf->ht.enabled;
2548
2549 if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2550 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
2551 goto out;
2552 }
2553
2554 if (!conf->radio_enabled)
2555 iwl_radio_kill_sw_disable_radio(priv);
2556
2557 if (!iwl_is_ready(priv)) {
2558 IWL_DEBUG_MAC80211("leave - not ready\n");
2559 ret = -EIO;
2560 goto out;
2561 }
2562
2563 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2564 test_bit(STATUS_SCANNING, &priv->status))) {
2565 IWL_DEBUG_MAC80211("leave - scanning\n");
2566 mutex_unlock(&priv->mutex);
2567 return 0;
2568 }
2569
2570 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2571 ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2572 if (!is_channel_valid(ch_info)) {
2573 IWL_DEBUG_MAC80211("leave - invalid channel\n");
2574 ret = -EINVAL;
2575 goto out;
2576 }
2577
2578 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2579 !is_channel_ibss(ch_info)) {
2580 IWL_ERROR("channel %d in band %d not IBSS channel\n",
2581 conf->channel->hw_value, conf->channel->band);
2582 ret = -EINVAL;
2583 goto out;
2584 }
2585
2586 spin_lock_irqsave(&priv->lock, flags);
2587
2588
2589 /* if we are switching from ht to 2.4 clear flags
2590 * from any ht related info since 2.4 does not
2591 * support ht */
2592 if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2593 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2594 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2595 #endif
2596 )
2597 priv->staging_rxon.flags = 0;
2598
2599 iwl_set_rxon_channel(priv, conf->channel);
2600
2601 iwl_set_flags_for_band(priv, conf->channel->band);
2602
2603 /* The list of supported rates and rate mask can be different
2604 * for each band; since the band may have changed, reset
2605 * the rate mask to what mac80211 lists */
2606 iwl_set_rate(priv);
2607
2608 spin_unlock_irqrestore(&priv->lock, flags);
2609
2610 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2611 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2612 iwl_hw_channel_switch(priv, conf->channel);
2613 goto out;
2614 }
2615 #endif
2616
2617 if (!conf->radio_enabled) {
2618 IWL_DEBUG_MAC80211("leave - radio disabled\n");
2619 goto out;
2620 }
2621
2622 if (iwl_is_rfkill(priv)) {
2623 IWL_DEBUG_MAC80211("leave - RF kill\n");
2624 ret = -EIO;
2625 goto out;
2626 }
2627
2628 if (conf->flags & IEEE80211_CONF_PS)
2629 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2630 else
2631 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2632 if (ret)
2633 IWL_DEBUG_MAC80211("Error setting power level\n");
2634
2635 IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
2636 priv->tx_power_user_lmt, conf->power_level);
2637
2638 iwl_set_tx_power(priv, conf->power_level, false);
2639
2640 iwl_set_rate(priv);
2641
2642 if (memcmp(&priv->active_rxon,
2643 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2644 iwl_commit_rxon(priv);
2645 else
2646 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
2647
2648 IWL_DEBUG_MAC80211("leave\n");
2649
2650 out:
2651 mutex_unlock(&priv->mutex);
2652 return ret;
2653 }
2654
2655 static void iwl_config_ap(struct iwl_priv *priv)
2656 {
2657 int ret = 0;
2658 unsigned long flags;
2659
2660 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2661 return;
2662
2663 /* The following should be done only at AP bring up */
2664 if (!iwl_is_associated(priv)) {
2665
2666 /* RXON - unassoc (to set timing command) */
2667 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2668 iwl_commit_rxon(priv);
2669
2670 /* RXON Timing */
2671 iwl_setup_rxon_timing(priv);
2672 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2673 sizeof(priv->rxon_timing), &priv->rxon_timing);
2674 if (ret)
2675 IWL_WARNING("REPLY_RXON_TIMING failed - "
2676 "Attempting to continue.\n");
2677
2678 iwl_set_rxon_chain(priv);
2679
2680 /* FIXME: what should be the assoc_id for AP? */
2681 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2682 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2683 priv->staging_rxon.flags |=
2684 RXON_FLG_SHORT_PREAMBLE_MSK;
2685 else
2686 priv->staging_rxon.flags &=
2687 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2688
2689 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2690 if (priv->assoc_capability &
2691 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2692 priv->staging_rxon.flags |=
2693 RXON_FLG_SHORT_SLOT_MSK;
2694 else
2695 priv->staging_rxon.flags &=
2696 ~RXON_FLG_SHORT_SLOT_MSK;
2697
2698 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2699 priv->staging_rxon.flags &=
2700 ~RXON_FLG_SHORT_SLOT_MSK;
2701 }
2702 /* restore RXON assoc */
2703 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2704 iwl_commit_rxon(priv);
2705 spin_lock_irqsave(&priv->lock, flags);
2706 iwl_activate_qos(priv, 1);
2707 spin_unlock_irqrestore(&priv->lock, flags);
2708 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2709 }
2710 iwl_send_beacon_cmd(priv);
2711
2712 /* FIXME - we need to add code here to detect a totally new
2713 * configuration, reset the AP, unassoc, rxon timing, assoc,
2714 * clear sta table, add BCAST sta... */
2715 }
2716
2717
2718 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2719 struct ieee80211_vif *vif,
2720 struct ieee80211_if_conf *conf)
2721 {
2722 struct iwl_priv *priv = hw->priv;
2723 int rc;
2724
2725 if (conf == NULL)
2726 return -EIO;
2727
2728 if (priv->vif != vif) {
2729 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
2730 return 0;
2731 }
2732
2733 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2734 conf->changed & IEEE80211_IFCC_BEACON) {
2735 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2736 if (!beacon)
2737 return -ENOMEM;
2738 mutex_lock(&priv->mutex);
2739 rc = iwl_mac_beacon_update(hw, beacon);
2740 mutex_unlock(&priv->mutex);
2741 if (rc)
2742 return rc;
2743 }
2744
2745 if (!iwl_is_alive(priv))
2746 return -EAGAIN;
2747
2748 mutex_lock(&priv->mutex);
2749
2750 if (conf->bssid)
2751 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
2752
2753 /*
2754 * very dubious code was here; the probe filtering flag is never set:
2755 *
2756 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2757 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2758 */
2759
2760 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2761 if (!conf->bssid) {
2762 conf->bssid = priv->mac_addr;
2763 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2764 IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
2765 conf->bssid);
2766 }
2767 if (priv->ibss_beacon)
2768 dev_kfree_skb(priv->ibss_beacon);
2769
2770 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2771 }
2772
2773 if (iwl_is_rfkill(priv))
2774 goto done;
2775
2776 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2777 !is_multicast_ether_addr(conf->bssid)) {
2778 /* If there is currently a HW scan going on in the background
2779 * then we need to cancel it else the RXON below will fail. */
2780 if (iwl_scan_cancel_timeout(priv, 100)) {
2781 IWL_WARNING("Aborted scan still in progress "
2782 "after 100ms\n");
2783 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2784 mutex_unlock(&priv->mutex);
2785 return -EAGAIN;
2786 }
2787 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2788
2789 /* TODO: Audit driver for usage of these members and see
2790 * if mac80211 deprecates them (priv->bssid looks like it
2791 * shouldn't be there, but I haven't scanned the IBSS code
2792 * to verify) - jpk */
2793 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2794
2795 if (priv->iw_mode == NL80211_IFTYPE_AP)
2796 iwl_config_ap(priv);
2797 else {
2798 rc = iwl_commit_rxon(priv);
2799 if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2800 iwl_rxon_add_station(
2801 priv, priv->active_rxon.bssid_addr, 1);
2802 }
2803
2804 } else {
2805 iwl_scan_cancel_timeout(priv, 100);
2806 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2807 iwl_commit_rxon(priv);
2808 }
2809
2810 done:
2811 IWL_DEBUG_MAC80211("leave\n");
2812 mutex_unlock(&priv->mutex);
2813
2814 return 0;
2815 }
2816
2817 static void iwl_configure_filter(struct ieee80211_hw *hw,
2818 unsigned int changed_flags,
2819 unsigned int *total_flags,
2820 int mc_count, struct dev_addr_list *mc_list)
2821 {
2822 struct iwl_priv *priv = hw->priv;
2823 __le32 *filter_flags = &priv->staging_rxon.filter_flags;
2824
2825 IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
2826 changed_flags, *total_flags);
2827
2828 if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
2829 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
2830 *filter_flags |= RXON_FILTER_PROMISC_MSK;
2831 else
2832 *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
2833 }
2834 if (changed_flags & FIF_ALLMULTI) {
2835 if (*total_flags & FIF_ALLMULTI)
2836 *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
2837 else
2838 *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
2839 }
2840 if (changed_flags & FIF_CONTROL) {
2841 if (*total_flags & FIF_CONTROL)
2842 *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
2843 else
2844 *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
2845 }
2846 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
2847 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
2848 *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
2849 else
2850 *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
2851 }
2852
2853 /* We avoid iwl_commit_rxon here to commit the new filter flags
2854 * since mac80211 will call ieee80211_hw_config immediately.
2855 * (mc_list is not supported at this time). Otherwise, we need to
2856 * queue a background iwl_commit_rxon work.
2857 */
2858
2859 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
2860 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
2861 }
2862
2863 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2864 struct ieee80211_if_init_conf *conf)
2865 {
2866 struct iwl_priv *priv = hw->priv;
2867
2868 IWL_DEBUG_MAC80211("enter\n");
2869
2870 mutex_lock(&priv->mutex);
2871
2872 if (iwl_is_ready_rf(priv)) {
2873 iwl_scan_cancel_timeout(priv, 100);
2874 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2875 iwl_commit_rxon(priv);
2876 }
2877 if (priv->vif == conf->vif) {
2878 priv->vif = NULL;
2879 memset(priv->bssid, 0, ETH_ALEN);
2880 }
2881 mutex_unlock(&priv->mutex);
2882
2883 IWL_DEBUG_MAC80211("leave\n");
2884
2885 }
2886
2887 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2888 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2889 struct ieee80211_vif *vif,
2890 struct ieee80211_bss_conf *bss_conf,
2891 u32 changes)
2892 {
2893 struct iwl_priv *priv = hw->priv;
2894
2895 IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
2896
2897 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2898 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
2899 bss_conf->use_short_preamble);
2900 if (bss_conf->use_short_preamble)
2901 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2902 else
2903 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2904 }
2905
2906 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2907 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
2908 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2909 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2910 else
2911 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2912 }
2913
2914 if (changes & BSS_CHANGED_HT) {
2915 iwl_ht_conf(priv, bss_conf);
2916 iwl_set_rxon_chain(priv);
2917 }
2918
2919 if (changes & BSS_CHANGED_ASSOC) {
2920 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
2921 /* This should never happen as this function should
2922 * never be called from interrupt context. */
2923 if (WARN_ON_ONCE(in_interrupt()))
2924 return;
2925 if (bss_conf->assoc) {
2926 priv->assoc_id = bss_conf->aid;
2927 priv->beacon_int = bss_conf->beacon_int;
2928 priv->power_data.dtim_period = bss_conf->dtim_period;
2929 priv->timestamp = bss_conf->timestamp;
2930 priv->assoc_capability = bss_conf->assoc_capability;
2931
2932 /* we have just associated, don't start scan too early
2933 * leave time for EAPOL exchange to complete
2934 */
2935 priv->next_scan_jiffies = jiffies +
2936 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2937 mutex_lock(&priv->mutex);
2938 iwl_post_associate(priv);
2939 mutex_unlock(&priv->mutex);
2940 } else {
2941 priv->assoc_id = 0;
2942 IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
2943 }
2944 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2945 IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
2946 iwl_send_rxon_assoc(priv);
2947 }
2948
2949 }
2950
2951 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
2952 {
2953 unsigned long flags;
2954 struct iwl_priv *priv = hw->priv;
2955 int ret;
2956
2957 IWL_DEBUG_MAC80211("enter\n");
2958
2959 mutex_lock(&priv->mutex);
2960 spin_lock_irqsave(&priv->lock, flags);
2961
2962 if (!iwl_is_ready_rf(priv)) {
2963 ret = -EIO;
2964 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
2965 goto out_unlock;
2966 }
2967
2968 /* We don't schedule scan within next_scan_jiffies period.
2969 * Avoid scanning during possible EAPOL exchange, return
2970 * success immediately.
2971 */
2972 if (priv->next_scan_jiffies &&
2973 time_after(priv->next_scan_jiffies, jiffies)) {
2974 IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
2975 queue_work(priv->workqueue, &priv->scan_completed);
2976 ret = 0;
2977 goto out_unlock;
2978 }
2979
2980 /* if we just finished scan ask for delay */
2981 if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
2982 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
2983 IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
2984 queue_work(priv->workqueue, &priv->scan_completed);
2985 ret = 0;
2986 goto out_unlock;
2987 }
2988
2989 if (ssid_len) {
2990 priv->one_direct_scan = 1;
2991 priv->direct_ssid_len = min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
2992 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
2993 } else {
2994 priv->one_direct_scan = 0;
2995 }
2996
2997 ret = iwl_scan_initiate(priv);
2998
2999 IWL_DEBUG_MAC80211("leave\n");
3000
3001 out_unlock:
3002 spin_unlock_irqrestore(&priv->lock, flags);
3003 mutex_unlock(&priv->mutex);
3004
3005 return ret;
3006 }
3007
3008 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
3009 struct ieee80211_key_conf *keyconf, const u8 *addr,
3010 u32 iv32, u16 *phase1key)
3011 {
3012
3013 struct iwl_priv *priv = hw->priv;
3014 IWL_DEBUG_MAC80211("enter\n");
3015
3016 iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
3017
3018 IWL_DEBUG_MAC80211("leave\n");
3019 }
3020
3021 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3022 const u8 *local_addr, const u8 *addr,
3023 struct ieee80211_key_conf *key)
3024 {
3025 struct iwl_priv *priv = hw->priv;
3026 int ret = 0;
3027 u8 sta_id = IWL_INVALID_STATION;
3028 u8 is_default_wep_key = 0;
3029
3030 IWL_DEBUG_MAC80211("enter\n");
3031
3032 if (priv->hw_params.sw_crypto) {
3033 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
3034 return -EOPNOTSUPP;
3035 }
3036
3037 if (is_zero_ether_addr(addr))
3038 /* only support pairwise keys */
3039 return -EOPNOTSUPP;
3040
3041 sta_id = iwl_find_station(priv, addr);
3042 if (sta_id == IWL_INVALID_STATION) {
3043 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3044 addr);
3045 return -EINVAL;
3046
3047 }
3048
3049 mutex_lock(&priv->mutex);
3050 iwl_scan_cancel_timeout(priv, 100);
3051 mutex_unlock(&priv->mutex);
3052
3053 /* If we are getting WEP group key and we didn't receive any key mapping
3054 * so far, we are in legacy wep mode (group key only), otherwise we are
3055 * in 1X mode.
3056 * In legacy wep mode, we use another host command to the uCode */
3057 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
3058 priv->iw_mode != NL80211_IFTYPE_AP) {
3059 if (cmd == SET_KEY)
3060 is_default_wep_key = !priv->key_mapping_key;
3061 else
3062 is_default_wep_key =
3063 (key->hw_key_idx == HW_KEY_DEFAULT);
3064 }
3065
3066 switch (cmd) {
3067 case SET_KEY:
3068 if (is_default_wep_key)
3069 ret = iwl_set_default_wep_key(priv, key);
3070 else
3071 ret = iwl_set_dynamic_key(priv, key, sta_id);
3072
3073 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
3074 break;
3075 case DISABLE_KEY:
3076 if (is_default_wep_key)
3077 ret = iwl_remove_default_wep_key(priv, key);
3078 else
3079 ret = iwl_remove_dynamic_key(priv, key, sta_id);
3080
3081 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
3082 break;
3083 default:
3084 ret = -EINVAL;
3085 }
3086
3087 IWL_DEBUG_MAC80211("leave\n");
3088
3089 return ret;
3090 }
3091
3092 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
3093 const struct ieee80211_tx_queue_params *params)
3094 {
3095 struct iwl_priv *priv = hw->priv;
3096 unsigned long flags;
3097 int q;
3098
3099 IWL_DEBUG_MAC80211("enter\n");
3100
3101 if (!iwl_is_ready_rf(priv)) {
3102 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3103 return -EIO;
3104 }
3105
3106 if (queue >= AC_NUM) {
3107 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
3108 return 0;
3109 }
3110
3111 q = AC_NUM - 1 - queue;
3112
3113 spin_lock_irqsave(&priv->lock, flags);
3114
3115 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
3116 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
3117 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
3118 priv->qos_data.def_qos_parm.ac[q].edca_txop =
3119 cpu_to_le16((params->txop * 32));
3120
3121 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
3122 priv->qos_data.qos_active = 1;
3123
3124 if (priv->iw_mode == NL80211_IFTYPE_AP)
3125 iwl_activate_qos(priv, 1);
3126 else if (priv->assoc_id && iwl_is_associated(priv))
3127 iwl_activate_qos(priv, 0);
3128
3129 spin_unlock_irqrestore(&priv->lock, flags);
3130
3131 IWL_DEBUG_MAC80211("leave\n");
3132 return 0;
3133 }
3134
3135 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
3136 enum ieee80211_ampdu_mlme_action action,
3137 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3138 {
3139 struct iwl_priv *priv = hw->priv;
3140
3141 IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
3142 sta->addr, tid);
3143
3144 if (!(priv->cfg->sku & IWL_SKU_N))
3145 return -EACCES;
3146
3147 switch (action) {
3148 case IEEE80211_AMPDU_RX_START:
3149 IWL_DEBUG_HT("start Rx\n");
3150 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
3151 case IEEE80211_AMPDU_RX_STOP:
3152 IWL_DEBUG_HT("stop Rx\n");
3153 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
3154 case IEEE80211_AMPDU_TX_START:
3155 IWL_DEBUG_HT("start Tx\n");
3156 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
3157 case IEEE80211_AMPDU_TX_STOP:
3158 IWL_DEBUG_HT("stop Tx\n");
3159 return iwl_tx_agg_stop(priv, sta->addr, tid);
3160 default:
3161 IWL_DEBUG_HT("unknown\n");
3162 return -EINVAL;
3163 break;
3164 }
3165 return 0;
3166 }
3167
3168 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
3169 struct ieee80211_tx_queue_stats *stats)
3170 {
3171 struct iwl_priv *priv = hw->priv;
3172 int i, avail;
3173 struct iwl_tx_queue *txq;
3174 struct iwl_queue *q;
3175 unsigned long flags;
3176
3177 IWL_DEBUG_MAC80211("enter\n");
3178
3179 if (!iwl_is_ready_rf(priv)) {
3180 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3181 return -EIO;
3182 }
3183
3184 spin_lock_irqsave(&priv->lock, flags);
3185
3186 for (i = 0; i < AC_NUM; i++) {
3187 txq = &priv->txq[i];
3188 q = &txq->q;
3189 avail = iwl_queue_space(q);
3190
3191 stats[i].len = q->n_window - avail;
3192 stats[i].limit = q->n_window - q->high_mark;
3193 stats[i].count = q->n_window;
3194
3195 }
3196 spin_unlock_irqrestore(&priv->lock, flags);
3197
3198 IWL_DEBUG_MAC80211("leave\n");
3199
3200 return 0;
3201 }
3202
3203 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
3204 struct ieee80211_low_level_stats *stats)
3205 {
3206 struct iwl_priv *priv = hw->priv;
3207
3208 priv = hw->priv;
3209 IWL_DEBUG_MAC80211("enter\n");
3210 IWL_DEBUG_MAC80211("leave\n");
3211
3212 return 0;
3213 }
3214
3215 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
3216 {
3217 struct iwl_priv *priv = hw->priv;
3218 unsigned long flags;
3219
3220 mutex_lock(&priv->mutex);
3221 IWL_DEBUG_MAC80211("enter\n");
3222
3223 spin_lock_irqsave(&priv->lock, flags);
3224 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
3225 spin_unlock_irqrestore(&priv->lock, flags);
3226
3227 iwl_reset_qos(priv);
3228
3229 spin_lock_irqsave(&priv->lock, flags);
3230 priv->assoc_id = 0;
3231 priv->assoc_capability = 0;
3232 priv->assoc_station_added = 0;
3233
3234 /* new association get rid of ibss beacon skb */
3235 if (priv->ibss_beacon)
3236 dev_kfree_skb(priv->ibss_beacon);
3237
3238 priv->ibss_beacon = NULL;
3239
3240 priv->beacon_int = priv->hw->conf.beacon_int;
3241 priv->timestamp = 0;
3242 if ((priv->iw_mode == NL80211_IFTYPE_STATION))
3243 priv->beacon_int = 0;
3244
3245 spin_unlock_irqrestore(&priv->lock, flags);
3246
3247 if (!iwl_is_ready_rf(priv)) {
3248 IWL_DEBUG_MAC80211("leave - not ready\n");
3249 mutex_unlock(&priv->mutex);
3250 return;
3251 }
3252
3253 /* we are restarting association process
3254 * clear RXON_FILTER_ASSOC_MSK bit
3255 */
3256 if (priv->iw_mode != NL80211_IFTYPE_AP) {
3257 iwl_scan_cancel_timeout(priv, 100);
3258 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3259 iwl_commit_rxon(priv);
3260 }
3261
3262 iwl_power_update_mode(priv, 0);
3263
3264 /* Per mac80211.h: This is only used in IBSS mode... */
3265 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3266
3267 /* switch to CAM during association period.
3268 * the ucode will block any association/authentication
3269 * frome during assiciation period if it can not hear
3270 * the AP because of PM. the timer enable PM back is
3271 * association do not complete
3272 */
3273 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3274 IEEE80211_CHAN_RADAR))
3275 iwl_power_disable_management(priv, 3000);
3276
3277 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
3278 mutex_unlock(&priv->mutex);
3279 return;
3280 }
3281
3282 iwl_set_rate(priv);
3283
3284 mutex_unlock(&priv->mutex);
3285
3286 IWL_DEBUG_MAC80211("leave\n");
3287 }
3288
3289 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3290 {
3291 struct iwl_priv *priv = hw->priv;
3292 unsigned long flags;
3293 __le64 timestamp;
3294
3295 IWL_DEBUG_MAC80211("enter\n");
3296
3297 if (!iwl_is_ready_rf(priv)) {
3298 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3299 return -EIO;
3300 }
3301
3302 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3303 IWL_DEBUG_MAC80211("leave - not IBSS\n");
3304 return -EIO;
3305 }
3306
3307 spin_lock_irqsave(&priv->lock, flags);
3308
3309 if (priv->ibss_beacon)
3310 dev_kfree_skb(priv->ibss_beacon);
3311
3312 priv->ibss_beacon = skb;
3313
3314 priv->assoc_id = 0;
3315 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3316 priv->timestamp = le64_to_cpu(timestamp);
3317
3318 IWL_DEBUG_MAC80211("leave\n");
3319 spin_unlock_irqrestore(&priv->lock, flags);
3320
3321 iwl_reset_qos(priv);
3322
3323 iwl_post_associate(priv);
3324
3325
3326 return 0;
3327 }
3328
3329 /*****************************************************************************
3330 *
3331 * sysfs attributes
3332 *
3333 *****************************************************************************/
3334
3335 #ifdef CONFIG_IWLWIFI_DEBUG
3336
3337 /*
3338 * The following adds a new attribute to the sysfs representation
3339 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3340 * used for controlling the debug level.
3341 *
3342 * See the level definitions in iwl for details.
3343 */
3344
3345 static ssize_t show_debug_level(struct device *d,
3346 struct device_attribute *attr, char *buf)
3347 {
3348 struct iwl_priv *priv = d->driver_data;
3349
3350 return sprintf(buf, "0x%08X\n", priv->debug_level);
3351 }
3352 static ssize_t store_debug_level(struct device *d,
3353 struct device_attribute *attr,
3354 const char *buf, size_t count)
3355 {
3356 struct iwl_priv *priv = d->driver_data;
3357 unsigned long val;
3358 int ret;
3359
3360 ret = strict_strtoul(buf, 0, &val);
3361 if (ret)
3362 printk(KERN_INFO DRV_NAME
3363 ": %s is not in hex or decimal form.\n", buf);
3364 else
3365 priv->debug_level = val;
3366
3367 return strnlen(buf, count);
3368 }
3369
3370 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3371 show_debug_level, store_debug_level);
3372
3373
3374 #endif /* CONFIG_IWLWIFI_DEBUG */
3375
3376
3377 static ssize_t show_version(struct device *d,
3378 struct device_attribute *attr, char *buf)
3379 {
3380 struct iwl_priv *priv = d->driver_data;
3381 struct iwl_alive_resp *palive = &priv->card_alive;
3382 ssize_t pos = 0;
3383 u16 eeprom_ver;
3384
3385 if (palive->is_valid)
3386 pos += sprintf(buf + pos,
3387 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3388 "fw type: 0x%01X 0x%01X\n",
3389 palive->ucode_major, palive->ucode_minor,
3390 palive->sw_rev[0], palive->sw_rev[1],
3391 palive->ver_type, palive->ver_subtype);
3392 else
3393 pos += sprintf(buf + pos, "fw not loaded\n");
3394
3395 if (priv->eeprom) {
3396 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3397 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3398 eeprom_ver);
3399 } else {
3400 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3401 }
3402
3403 return pos;
3404 }
3405
3406 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3407
3408 static ssize_t show_temperature(struct device *d,
3409 struct device_attribute *attr, char *buf)
3410 {
3411 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3412
3413 if (!iwl_is_alive(priv))
3414 return -EAGAIN;
3415
3416 return sprintf(buf, "%d\n", priv->temperature);
3417 }
3418
3419 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3420
3421 static ssize_t show_tx_power(struct device *d,
3422 struct device_attribute *attr, char *buf)
3423 {
3424 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3425
3426 if (!iwl_is_ready_rf(priv))
3427 return sprintf(buf, "off\n");
3428 else
3429 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3430 }
3431
3432 static ssize_t store_tx_power(struct device *d,
3433 struct device_attribute *attr,
3434 const char *buf, size_t count)
3435 {
3436 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3437 unsigned long val;
3438 int ret;
3439
3440 ret = strict_strtoul(buf, 10, &val);
3441 if (ret)
3442 printk(KERN_INFO DRV_NAME
3443 ": %s is not in decimal form.\n", buf);
3444 else
3445 iwl_set_tx_power(priv, val, false);
3446
3447 return count;
3448 }
3449
3450 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3451
3452 static ssize_t show_flags(struct device *d,
3453 struct device_attribute *attr, char *buf)
3454 {
3455 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3456
3457 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3458 }
3459
3460 static ssize_t store_flags(struct device *d,
3461 struct device_attribute *attr,
3462 const char *buf, size_t count)
3463 {
3464 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3465 unsigned long val;
3466 u32 flags;
3467 int ret = strict_strtoul(buf, 0, &val);
3468 if (ret)
3469 return ret;
3470 flags = (u32)val;
3471
3472 mutex_lock(&priv->mutex);
3473 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3474 /* Cancel any currently running scans... */
3475 if (iwl_scan_cancel_timeout(priv, 100))
3476 IWL_WARNING("Could not cancel scan.\n");
3477 else {
3478 IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
3479 priv->staging_rxon.flags = cpu_to_le32(flags);
3480 iwl_commit_rxon(priv);
3481 }
3482 }
3483 mutex_unlock(&priv->mutex);
3484
3485 return count;
3486 }
3487
3488 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3489
3490 static ssize_t show_filter_flags(struct device *d,
3491 struct device_attribute *attr, char *buf)
3492 {
3493 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3494
3495 return sprintf(buf, "0x%04X\n",
3496 le32_to_cpu(priv->active_rxon.filter_flags));
3497 }
3498
3499 static ssize_t store_filter_flags(struct device *d,
3500 struct device_attribute *attr,
3501 const char *buf, size_t count)
3502 {
3503 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3504 unsigned long val;
3505 u32 filter_flags;
3506 int ret = strict_strtoul(buf, 0, &val);
3507 if (ret)
3508 return ret;
3509 filter_flags = (u32)val;
3510
3511 mutex_lock(&priv->mutex);
3512 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3513 /* Cancel any currently running scans... */
3514 if (iwl_scan_cancel_timeout(priv, 100))
3515 IWL_WARNING("Could not cancel scan.\n");
3516 else {
3517 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
3518 "0x%04X\n", filter_flags);
3519 priv->staging_rxon.filter_flags =
3520 cpu_to_le32(filter_flags);
3521 iwl_commit_rxon(priv);
3522 }
3523 }
3524 mutex_unlock(&priv->mutex);
3525
3526 return count;
3527 }
3528
3529 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3530 store_filter_flags);
3531
3532 static ssize_t store_retry_rate(struct device *d,
3533 struct device_attribute *attr,
3534 const char *buf, size_t count)
3535 {
3536 struct iwl_priv *priv = dev_get_drvdata(d);
3537 long val;
3538 int ret = strict_strtol(buf, 10, &val);
3539 if (!ret)
3540 return ret;
3541
3542 priv->retry_rate = (val > 0) ? val : 1;
3543
3544 return count;
3545 }
3546
3547 static ssize_t show_retry_rate(struct device *d,
3548 struct device_attribute *attr, char *buf)
3549 {
3550 struct iwl_priv *priv = dev_get_drvdata(d);
3551 return sprintf(buf, "%d", priv->retry_rate);
3552 }
3553
3554 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3555 store_retry_rate);
3556
3557 static ssize_t store_power_level(struct device *d,
3558 struct device_attribute *attr,
3559 const char *buf, size_t count)
3560 {
3561 struct iwl_priv *priv = dev_get_drvdata(d);
3562 int ret;
3563 unsigned long mode;
3564
3565
3566 mutex_lock(&priv->mutex);
3567
3568 if (!iwl_is_ready(priv)) {
3569 ret = -EAGAIN;
3570 goto out;
3571 }
3572
3573 ret = strict_strtoul(buf, 10, &mode);
3574 if (ret)
3575 goto out;
3576
3577 ret = iwl_power_set_user_mode(priv, mode);
3578 if (ret) {
3579 IWL_DEBUG_MAC80211("failed setting power mode.\n");
3580 goto out;
3581 }
3582 ret = count;
3583
3584 out:
3585 mutex_unlock(&priv->mutex);
3586 return ret;
3587 }
3588
3589 static ssize_t show_power_level(struct device *d,
3590 struct device_attribute *attr, char *buf)
3591 {
3592 struct iwl_priv *priv = dev_get_drvdata(d);
3593 int mode = priv->power_data.user_power_setting;
3594 int system = priv->power_data.system_power_setting;
3595 int level = priv->power_data.power_mode;
3596 char *p = buf;
3597
3598 switch (system) {
3599 case IWL_POWER_SYS_AUTO:
3600 p += sprintf(p, "SYSTEM:auto");
3601 break;
3602 case IWL_POWER_SYS_AC:
3603 p += sprintf(p, "SYSTEM:ac");
3604 break;
3605 case IWL_POWER_SYS_BATTERY:
3606 p += sprintf(p, "SYSTEM:battery");
3607 break;
3608 }
3609
3610 p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3611 "fixed" : "auto");
3612 p += sprintf(p, "\tINDEX:%d", level);
3613 p += sprintf(p, "\n");
3614 return p - buf + 1;
3615 }
3616
3617 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3618 store_power_level);
3619
3620
3621 static ssize_t show_statistics(struct device *d,
3622 struct device_attribute *attr, char *buf)
3623 {
3624 struct iwl_priv *priv = dev_get_drvdata(d);
3625 u32 size = sizeof(struct iwl_notif_statistics);
3626 u32 len = 0, ofs = 0;
3627 u8 *data = (u8 *)&priv->statistics;
3628 int rc = 0;
3629
3630 if (!iwl_is_alive(priv))
3631 return -EAGAIN;
3632
3633 mutex_lock(&priv->mutex);
3634 rc = iwl_send_statistics_request(priv, 0);
3635 mutex_unlock(&priv->mutex);
3636
3637 if (rc) {
3638 len = sprintf(buf,
3639 "Error sending statistics request: 0x%08X\n", rc);
3640 return len;
3641 }
3642
3643 while (size && (PAGE_SIZE - len)) {
3644 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3645 PAGE_SIZE - len, 1);
3646 len = strlen(buf);
3647 if (PAGE_SIZE - len)
3648 buf[len++] = '\n';
3649
3650 ofs += 16;
3651 size -= min(size, 16U);
3652 }
3653
3654 return len;
3655 }
3656
3657 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3658
3659 static ssize_t show_status(struct device *d,
3660 struct device_attribute *attr, char *buf)
3661 {
3662 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3663 if (!iwl_is_alive(priv))
3664 return -EAGAIN;
3665 return sprintf(buf, "0x%08x\n", (int)priv->status);
3666 }
3667
3668 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3669
3670 /*****************************************************************************
3671 *
3672 * driver setup and teardown
3673 *
3674 *****************************************************************************/
3675
3676 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3677 {
3678 priv->workqueue = create_workqueue(DRV_NAME);
3679
3680 init_waitqueue_head(&priv->wait_command_queue);
3681
3682 INIT_WORK(&priv->up, iwl_bg_up);
3683 INIT_WORK(&priv->restart, iwl_bg_restart);
3684 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3685 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3686 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3687 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3688 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3689 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3690
3691 iwl_setup_scan_deferred_work(priv);
3692 iwl_setup_power_deferred_work(priv);
3693
3694 if (priv->cfg->ops->lib->setup_deferred_work)
3695 priv->cfg->ops->lib->setup_deferred_work(priv);
3696
3697 init_timer(&priv->statistics_periodic);
3698 priv->statistics_periodic.data = (unsigned long)priv;
3699 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3700
3701 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3702 iwl_irq_tasklet, (unsigned long)priv);
3703 }
3704
3705 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3706 {
3707 if (priv->cfg->ops->lib->cancel_deferred_work)
3708 priv->cfg->ops->lib->cancel_deferred_work(priv);
3709
3710 cancel_delayed_work_sync(&priv->init_alive_start);
3711 cancel_delayed_work(&priv->scan_check);
3712 cancel_delayed_work_sync(&priv->set_power_save);
3713 cancel_delayed_work(&priv->alive_start);
3714 cancel_work_sync(&priv->beacon_update);
3715 del_timer_sync(&priv->statistics_periodic);
3716 }
3717
3718 static struct attribute *iwl_sysfs_entries[] = {
3719 &dev_attr_flags.attr,
3720 &dev_attr_filter_flags.attr,
3721 &dev_attr_power_level.attr,
3722 &dev_attr_retry_rate.attr,
3723 &dev_attr_statistics.attr,
3724 &dev_attr_status.attr,
3725 &dev_attr_temperature.attr,
3726 &dev_attr_tx_power.attr,
3727 #ifdef CONFIG_IWLWIFI_DEBUG
3728 &dev_attr_debug_level.attr,
3729 #endif
3730 &dev_attr_version.attr,
3731
3732 NULL
3733 };
3734
3735 static struct attribute_group iwl_attribute_group = {
3736 .name = NULL, /* put in device directory */
3737 .attrs = iwl_sysfs_entries,
3738 };
3739
3740 static struct ieee80211_ops iwl_hw_ops = {
3741 .tx = iwl_mac_tx,
3742 .start = iwl_mac_start,
3743 .stop = iwl_mac_stop,
3744 .add_interface = iwl_mac_add_interface,
3745 .remove_interface = iwl_mac_remove_interface,
3746 .config = iwl_mac_config,
3747 .config_interface = iwl_mac_config_interface,
3748 .configure_filter = iwl_configure_filter,
3749 .set_key = iwl_mac_set_key,
3750 .update_tkip_key = iwl_mac_update_tkip_key,
3751 .get_stats = iwl_mac_get_stats,
3752 .get_tx_stats = iwl_mac_get_tx_stats,
3753 .conf_tx = iwl_mac_conf_tx,
3754 .reset_tsf = iwl_mac_reset_tsf,
3755 .bss_info_changed = iwl_bss_info_changed,
3756 .ampdu_action = iwl_mac_ampdu_action,
3757 .hw_scan = iwl_mac_hw_scan
3758 };
3759
3760 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3761 {
3762 int err = 0;
3763 struct iwl_priv *priv;
3764 struct ieee80211_hw *hw;
3765 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3766 unsigned long flags;
3767
3768 /************************
3769 * 1. Allocating HW data
3770 ************************/
3771
3772 /* Disabling hardware scan means that mac80211 will perform scans
3773 * "the hard way", rather than using device's scan. */
3774 if (cfg->mod_params->disable_hw_scan) {
3775 if (cfg->mod_params->debug & IWL_DL_INFO)
3776 dev_printk(KERN_DEBUG, &(pdev->dev),
3777 "Disabling hw_scan\n");
3778 iwl_hw_ops.hw_scan = NULL;
3779 }
3780
3781 hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3782 if (!hw) {
3783 err = -ENOMEM;
3784 goto out;
3785 }
3786 priv = hw->priv;
3787 /* At this point both hw and priv are allocated. */
3788
3789 SET_IEEE80211_DEV(hw, &pdev->dev);
3790
3791 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
3792 priv->cfg = cfg;
3793 priv->pci_dev = pdev;
3794
3795 #ifdef CONFIG_IWLWIFI_DEBUG
3796 priv->debug_level = priv->cfg->mod_params->debug;
3797 atomic_set(&priv->restrict_refcnt, 0);
3798 #endif
3799
3800 /**************************
3801 * 2. Initializing PCI bus
3802 **************************/
3803 if (pci_enable_device(pdev)) {
3804 err = -ENODEV;
3805 goto out_ieee80211_free_hw;
3806 }
3807
3808 pci_set_master(pdev);
3809
3810 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3811 if (!err)
3812 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3813 if (err) {
3814 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3815 if (!err)
3816 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3817 /* both attempts failed: */
3818 if (err) {
3819 printk(KERN_WARNING "%s: No suitable DMA available.\n",
3820 DRV_NAME);
3821 goto out_pci_disable_device;
3822 }
3823 }
3824
3825 err = pci_request_regions(pdev, DRV_NAME);
3826 if (err)
3827 goto out_pci_disable_device;
3828
3829 pci_set_drvdata(pdev, priv);
3830
3831
3832 /***********************
3833 * 3. Read REV register
3834 ***********************/
3835 priv->hw_base = pci_iomap(pdev, 0, 0);
3836 if (!priv->hw_base) {
3837 err = -ENODEV;
3838 goto out_pci_release_regions;
3839 }
3840
3841 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
3842 (unsigned long long) pci_resource_len(pdev, 0));
3843 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
3844
3845 iwl_hw_detect(priv);
3846 printk(KERN_INFO DRV_NAME
3847 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3848 priv->cfg->name, priv->hw_rev);
3849
3850 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3851 * PCI Tx retries from interfering with C3 CPU state */
3852 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3853
3854 /* amp init */
3855 err = priv->cfg->ops->lib->apm_ops.init(priv);
3856 if (err < 0) {
3857 IWL_DEBUG_INFO("Failed to init APMG\n");
3858 goto out_iounmap;
3859 }
3860 /*****************
3861 * 4. Read EEPROM
3862 *****************/
3863 /* Read the EEPROM */
3864 err = iwl_eeprom_init(priv);
3865 if (err) {
3866 IWL_ERROR("Unable to init EEPROM\n");
3867 goto out_iounmap;
3868 }
3869 err = iwl_eeprom_check_version(priv);
3870 if (err)
3871 goto out_iounmap;
3872
3873 /* extract MAC Address */
3874 iwl_eeprom_get_mac(priv, priv->mac_addr);
3875 IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
3876 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3877
3878 /************************
3879 * 5. Setup HW constants
3880 ************************/
3881 if (iwl_set_hw_params(priv)) {
3882 IWL_ERROR("failed to set hw parameters\n");
3883 goto out_free_eeprom;
3884 }
3885
3886 /*******************
3887 * 6. Setup priv
3888 *******************/
3889
3890 err = iwl_init_drv(priv);
3891 if (err)
3892 goto out_free_eeprom;
3893 /* At this point both hw and priv are initialized. */
3894
3895 /**********************************
3896 * 7. Initialize module parameters
3897 **********************************/
3898
3899 /* Disable radio (SW RF KILL) via parameter when loading driver */
3900 if (priv->cfg->mod_params->disable) {
3901 set_bit(STATUS_RF_KILL_SW, &priv->status);
3902 IWL_DEBUG_INFO("Radio disabled.\n");
3903 }
3904
3905 /********************
3906 * 8. Setup services
3907 ********************/
3908 spin_lock_irqsave(&priv->lock, flags);
3909 iwl_disable_interrupts(priv);
3910 spin_unlock_irqrestore(&priv->lock, flags);
3911
3912 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3913 if (err) {
3914 IWL_ERROR("failed to create sysfs device attributes\n");
3915 goto out_uninit_drv;
3916 }
3917
3918
3919 iwl_setup_deferred_work(priv);
3920 iwl_setup_rx_handlers(priv);
3921
3922 /********************
3923 * 9. Conclude
3924 ********************/
3925 pci_save_state(pdev);
3926 pci_disable_device(pdev);
3927
3928 /**********************************
3929 * 10. Setup and register mac80211
3930 **********************************/
3931
3932 err = iwl_setup_mac(priv);
3933 if (err)
3934 goto out_remove_sysfs;
3935
3936 err = iwl_dbgfs_register(priv, DRV_NAME);
3937 if (err)
3938 IWL_ERROR("failed to create debugfs files\n");
3939
3940 err = iwl_rfkill_init(priv);
3941 if (err)
3942 IWL_ERROR("Unable to initialize RFKILL system. "
3943 "Ignoring error: %d\n", err);
3944 iwl_power_initialize(priv);
3945 return 0;
3946
3947 out_remove_sysfs:
3948 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3949 out_uninit_drv:
3950 iwl_uninit_drv(priv);
3951 out_free_eeprom:
3952 iwl_eeprom_free(priv);
3953 out_iounmap:
3954 pci_iounmap(pdev, priv->hw_base);
3955 out_pci_release_regions:
3956 pci_release_regions(pdev);
3957 pci_set_drvdata(pdev, NULL);
3958 out_pci_disable_device:
3959 pci_disable_device(pdev);
3960 out_ieee80211_free_hw:
3961 ieee80211_free_hw(priv->hw);
3962 out:
3963 return err;
3964 }
3965
3966 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3967 {
3968 struct iwl_priv *priv = pci_get_drvdata(pdev);
3969 unsigned long flags;
3970
3971 if (!priv)
3972 return;
3973
3974 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
3975
3976 iwl_dbgfs_unregister(priv);
3977 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3978
3979 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3980 * to be called and iwl_down since we are removing the device
3981 * we need to set STATUS_EXIT_PENDING bit.
3982 */
3983 set_bit(STATUS_EXIT_PENDING, &priv->status);
3984 if (priv->mac80211_registered) {
3985 ieee80211_unregister_hw(priv->hw);
3986 priv->mac80211_registered = 0;
3987 } else {
3988 iwl_down(priv);
3989 }
3990
3991 /* make sure we flush any pending irq or
3992 * tasklet for the driver
3993 */
3994 spin_lock_irqsave(&priv->lock, flags);
3995 iwl_disable_interrupts(priv);
3996 spin_unlock_irqrestore(&priv->lock, flags);
3997
3998 iwl_synchronize_irq(priv);
3999
4000 iwl_rfkill_unregister(priv);
4001 iwl_dealloc_ucode_pci(priv);
4002
4003 if (priv->rxq.bd)
4004 iwl_rx_queue_free(priv, &priv->rxq);
4005 iwl_hw_txq_ctx_free(priv);
4006
4007 iwl_clear_stations_table(priv);
4008 iwl_eeprom_free(priv);
4009
4010
4011 /*netif_stop_queue(dev); */
4012 flush_workqueue(priv->workqueue);
4013
4014 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
4015 * priv->workqueue... so we can't take down the workqueue
4016 * until now... */
4017 destroy_workqueue(priv->workqueue);
4018 priv->workqueue = NULL;
4019
4020 pci_iounmap(pdev, priv->hw_base);
4021 pci_release_regions(pdev);
4022 pci_disable_device(pdev);
4023 pci_set_drvdata(pdev, NULL);
4024
4025 iwl_uninit_drv(priv);
4026
4027 if (priv->ibss_beacon)
4028 dev_kfree_skb(priv->ibss_beacon);
4029
4030 ieee80211_free_hw(priv->hw);
4031 }
4032
4033 #ifdef CONFIG_PM
4034
4035 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
4036 {
4037 struct iwl_priv *priv = pci_get_drvdata(pdev);
4038
4039 if (priv->is_open) {
4040 set_bit(STATUS_IN_SUSPEND, &priv->status);
4041 iwl_mac_stop(priv->hw);
4042 priv->is_open = 1;
4043 }
4044
4045 pci_save_state(pdev);
4046 pci_set_power_state(pdev, PCI_D3hot);
4047
4048 return 0;
4049 }
4050
4051 static int iwl_pci_resume(struct pci_dev *pdev)
4052 {
4053 struct iwl_priv *priv = pci_get_drvdata(pdev);
4054
4055 pci_set_power_state(pdev, PCI_D0);
4056 pci_restore_state(pdev);
4057
4058 if (priv->is_open)
4059 iwl_mac_start(priv->hw);
4060
4061 clear_bit(STATUS_IN_SUSPEND, &priv->status);
4062 return 0;
4063 }
4064
4065 #endif /* CONFIG_PM */
4066
4067 /*****************************************************************************
4068 *
4069 * driver and module entry point
4070 *
4071 *****************************************************************************/
4072
4073 /* Hardware specific file defines the PCI IDs table for that hardware module */
4074 static struct pci_device_id iwl_hw_card_ids[] = {
4075 #ifdef CONFIG_IWL4965
4076 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4077 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4078 #endif /* CONFIG_IWL4965 */
4079 #ifdef CONFIG_IWL5000
4080 {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
4081 {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
4082 {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
4083 {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
4084 {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
4085 {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
4086 {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
4087 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
4088 {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
4089 {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
4090 /* 5350 WiFi/WiMax */
4091 {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
4092 {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
4093 {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
4094 /* 5150 Wifi/WiMax */
4095 {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
4096 {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
4097 #endif /* CONFIG_IWL5000 */
4098
4099 {0}
4100 };
4101 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
4102
4103 static struct pci_driver iwl_driver = {
4104 .name = DRV_NAME,
4105 .id_table = iwl_hw_card_ids,
4106 .probe = iwl_pci_probe,
4107 .remove = __devexit_p(iwl_pci_remove),
4108 #ifdef CONFIG_PM
4109 .suspend = iwl_pci_suspend,
4110 .resume = iwl_pci_resume,
4111 #endif
4112 };
4113
4114 static int __init iwl_init(void)
4115 {
4116
4117 int ret;
4118 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4119 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4120
4121 ret = iwlagn_rate_control_register();
4122 if (ret) {
4123 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
4124 return ret;
4125 }
4126
4127 ret = pci_register_driver(&iwl_driver);
4128 if (ret) {
4129 IWL_ERROR("Unable to initialize PCI module\n");
4130 goto error_register;
4131 }
4132
4133 return ret;
4134
4135 error_register:
4136 iwlagn_rate_control_unregister();
4137 return ret;
4138 }
4139
4140 static void __exit iwl_exit(void)
4141 {
4142 pci_unregister_driver(&iwl_driver);
4143 iwlagn_rate_control_unregister();
4144 }
4145
4146 module_exit(iwl_exit);
4147 module_init(iwl_init);
Linux kernel - Deliverables
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