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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-lib.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
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 #include <linux/etherdevice.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34
35 #include "iwl-dev.h"
36 #include "iwl-core.h"
37 #include "iwl-io.h"
38 #include "iwl-helpers.h"
39 #include "iwl-agn-hw.h"
40 #include "iwl-agn.h"
41 #include "iwl-sta.h"
42 #include "iwl-trans.h"
43 #include "iwl-shared.h"
44
45 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
46 {
47 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
48 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
49 }
50
51 int iwlagn_send_tx_power(struct iwl_priv *priv)
52 {
53 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
54 u8 tx_ant_cfg_cmd;
55
56 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->shrd->status),
57 "TX Power requested while scanning!\n"))
58 return -EAGAIN;
59
60 /* half dBm need to multiply */
61 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
62
63 if (priv->tx_power_lmt_in_half_dbm &&
64 priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
65 /*
66 * For the newer devices which using enhanced/extend tx power
67 * table in EEPROM, the format is in half dBm. driver need to
68 * convert to dBm format before report to mac80211.
69 * By doing so, there is a possibility of 1/2 dBm resolution
70 * lost. driver will perform "round-up" operation before
71 * reporting, but it will cause 1/2 dBm tx power over the
72 * regulatory limit. Perform the checking here, if the
73 * "tx_power_user_lmt" is higher than EEPROM value (in
74 * half-dBm format), lower the tx power based on EEPROM
75 */
76 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
77 }
78 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
79 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
80
81 if (IWL_UCODE_API(priv->ucode_ver) == 1)
82 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
83 else
84 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
85
86 return iwl_trans_send_cmd_pdu(trans(priv), tx_ant_cfg_cmd, CMD_SYNC,
87 sizeof(tx_power_cmd), &tx_power_cmd);
88 }
89
90 void iwlagn_temperature(struct iwl_priv *priv)
91 {
92 /* store temperature from correct statistics (in Celsius) */
93 priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
94 iwl_tt_handler(priv);
95 }
96
97 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
98 {
99 struct iwl_eeprom_calib_hdr {
100 u8 version;
101 u8 pa_type;
102 u16 voltage;
103 } *hdr;
104
105 hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
106 EEPROM_CALIB_ALL);
107 return hdr->version;
108
109 }
110
111 /*
112 * EEPROM
113 */
114 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
115 {
116 u16 offset = 0;
117
118 if ((address & INDIRECT_ADDRESS) == 0)
119 return address;
120
121 switch (address & INDIRECT_TYPE_MSK) {
122 case INDIRECT_HOST:
123 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
124 break;
125 case INDIRECT_GENERAL:
126 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
127 break;
128 case INDIRECT_REGULATORY:
129 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
130 break;
131 case INDIRECT_TXP_LIMIT:
132 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
133 break;
134 case INDIRECT_TXP_LIMIT_SIZE:
135 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
136 break;
137 case INDIRECT_CALIBRATION:
138 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
139 break;
140 case INDIRECT_PROCESS_ADJST:
141 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
142 break;
143 case INDIRECT_OTHERS:
144 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
145 break;
146 default:
147 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
148 address & INDIRECT_TYPE_MSK);
149 break;
150 }
151
152 /* translate the offset from words to byte */
153 return (address & ADDRESS_MSK) + (offset << 1);
154 }
155
156 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
157 {
158 u32 address = eeprom_indirect_address(priv, offset);
159 BUG_ON(address >= priv->cfg->base_params->eeprom_size);
160 return &priv->eeprom[address];
161 }
162
163 struct iwl_mod_params iwlagn_mod_params = {
164 .amsdu_size_8K = 1,
165 .restart_fw = 1,
166 .plcp_check = true,
167 .bt_coex_active = true,
168 .no_sleep_autoadjust = true,
169 .power_level = IWL_POWER_INDEX_1,
170 .bt_ch_announce = true,
171 .wanted_ucode_alternative = 1,
172 .auto_agg = true,
173 /* the rest are 0 by default */
174 };
175
176 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
177 {
178 int idx = 0;
179 int band_offset = 0;
180
181 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
182 if (rate_n_flags & RATE_MCS_HT_MSK) {
183 idx = (rate_n_flags & 0xff);
184 return idx;
185 /* Legacy rate format, search for match in table */
186 } else {
187 if (band == IEEE80211_BAND_5GHZ)
188 band_offset = IWL_FIRST_OFDM_RATE;
189 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
190 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
191 return idx - band_offset;
192 }
193
194 return -1;
195 }
196
197 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
198 struct ieee80211_vif *vif,
199 enum ieee80211_band band,
200 struct iwl_scan_channel *scan_ch)
201 {
202 const struct ieee80211_supported_band *sband;
203 u16 passive_dwell = 0;
204 u16 active_dwell = 0;
205 int added = 0;
206 u16 channel = 0;
207
208 sband = iwl_get_hw_mode(priv, band);
209 if (!sband) {
210 IWL_ERR(priv, "invalid band\n");
211 return added;
212 }
213
214 active_dwell = iwl_get_active_dwell_time(priv, band, 0);
215 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
216
217 if (passive_dwell <= active_dwell)
218 passive_dwell = active_dwell + 1;
219
220 channel = iwl_get_single_channel_number(priv, band);
221 if (channel) {
222 scan_ch->channel = cpu_to_le16(channel);
223 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
224 scan_ch->active_dwell = cpu_to_le16(active_dwell);
225 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
226 /* Set txpower levels to defaults */
227 scan_ch->dsp_atten = 110;
228 if (band == IEEE80211_BAND_5GHZ)
229 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
230 else
231 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
232 added++;
233 } else
234 IWL_ERR(priv, "no valid channel found\n");
235 return added;
236 }
237
238 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
239 struct ieee80211_vif *vif,
240 enum ieee80211_band band,
241 u8 is_active, u8 n_probes,
242 struct iwl_scan_channel *scan_ch)
243 {
244 struct ieee80211_channel *chan;
245 const struct ieee80211_supported_band *sband;
246 const struct iwl_channel_info *ch_info;
247 u16 passive_dwell = 0;
248 u16 active_dwell = 0;
249 int added, i;
250 u16 channel;
251
252 sband = iwl_get_hw_mode(priv, band);
253 if (!sband)
254 return 0;
255
256 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
257 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
258
259 if (passive_dwell <= active_dwell)
260 passive_dwell = active_dwell + 1;
261
262 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
263 chan = priv->scan_request->channels[i];
264
265 if (chan->band != band)
266 continue;
267
268 channel = chan->hw_value;
269 scan_ch->channel = cpu_to_le16(channel);
270
271 ch_info = iwl_get_channel_info(priv, band, channel);
272 if (!is_channel_valid(ch_info)) {
273 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
274 channel);
275 continue;
276 }
277
278 if (!is_active || is_channel_passive(ch_info) ||
279 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
280 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
281 else
282 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
283
284 if (n_probes)
285 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
286
287 scan_ch->active_dwell = cpu_to_le16(active_dwell);
288 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
289
290 /* Set txpower levels to defaults */
291 scan_ch->dsp_atten = 110;
292
293 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
294 * power level:
295 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
296 */
297 if (band == IEEE80211_BAND_5GHZ)
298 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
299 else
300 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
301
302 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
303 channel, le32_to_cpu(scan_ch->type),
304 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
305 "ACTIVE" : "PASSIVE",
306 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
307 active_dwell : passive_dwell);
308
309 scan_ch++;
310 added++;
311 }
312
313 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
314 return added;
315 }
316
317 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
318 {
319 struct iwl_host_cmd cmd = {
320 .id = REPLY_SCAN_CMD,
321 .len = { sizeof(struct iwl_scan_cmd), },
322 .flags = CMD_SYNC,
323 };
324 struct iwl_scan_cmd *scan;
325 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
326 u32 rate_flags = 0;
327 u16 cmd_len;
328 u16 rx_chain = 0;
329 enum ieee80211_band band;
330 u8 n_probes = 0;
331 u8 rx_ant = hw_params(priv).valid_rx_ant;
332 u8 rate;
333 bool is_active = false;
334 int chan_mod;
335 u8 active_chains;
336 u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
337 int ret;
338
339 lockdep_assert_held(&priv->shrd->mutex);
340
341 if (vif)
342 ctx = iwl_rxon_ctx_from_vif(vif);
343
344 if (!priv->scan_cmd) {
345 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
346 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
347 if (!priv->scan_cmd) {
348 IWL_DEBUG_SCAN(priv,
349 "fail to allocate memory for scan\n");
350 return -ENOMEM;
351 }
352 }
353 scan = priv->scan_cmd;
354 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
355
356 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
357 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
358
359 if (priv->scan_type != IWL_SCAN_ROC &&
360 iwl_is_any_associated(priv)) {
361 u16 interval = 0;
362 u32 extra;
363 u32 suspend_time = 100;
364 u32 scan_suspend_time = 100;
365
366 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
367 switch (priv->scan_type) {
368 case IWL_SCAN_ROC:
369 WARN_ON(1);
370 break;
371 case IWL_SCAN_RADIO_RESET:
372 interval = 0;
373 break;
374 case IWL_SCAN_NORMAL:
375 interval = vif->bss_conf.beacon_int;
376 break;
377 }
378
379 scan->suspend_time = 0;
380 scan->max_out_time = cpu_to_le32(200 * 1024);
381 if (!interval)
382 interval = suspend_time;
383
384 extra = (suspend_time / interval) << 22;
385 scan_suspend_time = (extra |
386 ((suspend_time % interval) * 1024));
387 scan->suspend_time = cpu_to_le32(scan_suspend_time);
388 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
389 scan_suspend_time, interval);
390 } else if (priv->scan_type == IWL_SCAN_ROC) {
391 scan->suspend_time = 0;
392 scan->max_out_time = 0;
393 scan->quiet_time = 0;
394 scan->quiet_plcp_th = 0;
395 }
396
397 switch (priv->scan_type) {
398 case IWL_SCAN_RADIO_RESET:
399 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
400 break;
401 case IWL_SCAN_NORMAL:
402 if (priv->scan_request->n_ssids) {
403 int i, p = 0;
404 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
405 for (i = 0; i < priv->scan_request->n_ssids; i++) {
406 /* always does wildcard anyway */
407 if (!priv->scan_request->ssids[i].ssid_len)
408 continue;
409 scan->direct_scan[p].id = WLAN_EID_SSID;
410 scan->direct_scan[p].len =
411 priv->scan_request->ssids[i].ssid_len;
412 memcpy(scan->direct_scan[p].ssid,
413 priv->scan_request->ssids[i].ssid,
414 priv->scan_request->ssids[i].ssid_len);
415 n_probes++;
416 p++;
417 }
418 is_active = true;
419 } else
420 IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
421 break;
422 case IWL_SCAN_ROC:
423 IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
424 break;
425 }
426
427 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
428 scan->tx_cmd.sta_id = ctx->bcast_sta_id;
429 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
430
431 switch (priv->scan_band) {
432 case IEEE80211_BAND_2GHZ:
433 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
434 chan_mod = le32_to_cpu(
435 priv->contexts[IWL_RXON_CTX_BSS].active.flags &
436 RXON_FLG_CHANNEL_MODE_MSK)
437 >> RXON_FLG_CHANNEL_MODE_POS;
438 if (chan_mod == CHANNEL_MODE_PURE_40) {
439 rate = IWL_RATE_6M_PLCP;
440 } else {
441 rate = IWL_RATE_1M_PLCP;
442 rate_flags = RATE_MCS_CCK_MSK;
443 }
444 /*
445 * Internal scans are passive, so we can indiscriminately set
446 * the BT ignore flag on 2.4 GHz since it applies to TX only.
447 */
448 if (priv->cfg->bt_params &&
449 priv->cfg->bt_params->advanced_bt_coexist)
450 scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
451 break;
452 case IEEE80211_BAND_5GHZ:
453 rate = IWL_RATE_6M_PLCP;
454 break;
455 default:
456 IWL_WARN(priv, "Invalid scan band\n");
457 return -EIO;
458 }
459
460 /*
461 * If active scanning is requested but a certain channel is
462 * marked passive, we can do active scanning if we detect
463 * transmissions.
464 *
465 * There is an issue with some firmware versions that triggers
466 * a sysassert on a "good CRC threshold" of zero (== disabled),
467 * on a radar channel even though this means that we should NOT
468 * send probes.
469 *
470 * The "good CRC threshold" is the number of frames that we
471 * need to receive during our dwell time on a channel before
472 * sending out probes -- setting this to a huge value will
473 * mean we never reach it, but at the same time work around
474 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
475 * here instead of IWL_GOOD_CRC_TH_DISABLED.
476 *
477 * This was fixed in later versions along with some other
478 * scan changes, and the threshold behaves as a flag in those
479 * versions.
480 */
481 if (priv->new_scan_threshold_behaviour)
482 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
483 IWL_GOOD_CRC_TH_DISABLED;
484 else
485 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
486 IWL_GOOD_CRC_TH_NEVER;
487
488 band = priv->scan_band;
489
490 if (priv->cfg->scan_rx_antennas[band])
491 rx_ant = priv->cfg->scan_rx_antennas[band];
492
493 if (band == IEEE80211_BAND_2GHZ &&
494 priv->cfg->bt_params &&
495 priv->cfg->bt_params->advanced_bt_coexist) {
496 /* transmit 2.4 GHz probes only on first antenna */
497 scan_tx_antennas = first_antenna(scan_tx_antennas);
498 }
499
500 priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
501 scan_tx_antennas);
502 rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
503 scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
504
505 /* In power save mode use one chain, otherwise use all chains */
506 if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
507 /* rx_ant has been set to all valid chains previously */
508 active_chains = rx_ant &
509 ((u8)(priv->chain_noise_data.active_chains));
510 if (!active_chains)
511 active_chains = rx_ant;
512
513 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
514 priv->chain_noise_data.active_chains);
515
516 rx_ant = first_antenna(active_chains);
517 }
518 if (priv->cfg->bt_params &&
519 priv->cfg->bt_params->advanced_bt_coexist &&
520 priv->bt_full_concurrent) {
521 /* operated as 1x1 in full concurrency mode */
522 rx_ant = first_antenna(rx_ant);
523 }
524
525 /* MIMO is not used here, but value is required */
526 rx_chain |=
527 hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
528 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
529 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
530 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
531 scan->rx_chain = cpu_to_le16(rx_chain);
532 switch (priv->scan_type) {
533 case IWL_SCAN_NORMAL:
534 cmd_len = iwl_fill_probe_req(priv,
535 (struct ieee80211_mgmt *)scan->data,
536 vif->addr,
537 priv->scan_request->ie,
538 priv->scan_request->ie_len,
539 IWL_MAX_SCAN_SIZE - sizeof(*scan));
540 break;
541 case IWL_SCAN_RADIO_RESET:
542 case IWL_SCAN_ROC:
543 /* use bcast addr, will not be transmitted but must be valid */
544 cmd_len = iwl_fill_probe_req(priv,
545 (struct ieee80211_mgmt *)scan->data,
546 iwl_bcast_addr, NULL, 0,
547 IWL_MAX_SCAN_SIZE - sizeof(*scan));
548 break;
549 default:
550 BUG();
551 }
552 scan->tx_cmd.len = cpu_to_le16(cmd_len);
553
554 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
555 RXON_FILTER_BCON_AWARE_MSK);
556
557 switch (priv->scan_type) {
558 case IWL_SCAN_RADIO_RESET:
559 scan->channel_count =
560 iwl_get_single_channel_for_scan(priv, vif, band,
561 (void *)&scan->data[cmd_len]);
562 break;
563 case IWL_SCAN_NORMAL:
564 scan->channel_count =
565 iwl_get_channels_for_scan(priv, vif, band,
566 is_active, n_probes,
567 (void *)&scan->data[cmd_len]);
568 break;
569 case IWL_SCAN_ROC: {
570 struct iwl_scan_channel *scan_ch;
571
572 scan->channel_count = 1;
573
574 scan_ch = (void *)&scan->data[cmd_len];
575 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
576 scan_ch->channel =
577 cpu_to_le16(priv->hw_roc_channel->hw_value);
578 scan_ch->active_dwell =
579 scan_ch->passive_dwell =
580 cpu_to_le16(priv->hw_roc_duration);
581
582 /* Set txpower levels to defaults */
583 scan_ch->dsp_atten = 110;
584
585 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
586 * power level:
587 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
588 */
589 if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
590 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
591 else
592 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
593 }
594 break;
595 }
596
597 if (scan->channel_count == 0) {
598 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
599 return -EIO;
600 }
601
602 cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
603 scan->channel_count * sizeof(struct iwl_scan_channel);
604 cmd.data[0] = scan;
605 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
606 scan->len = cpu_to_le16(cmd.len[0]);
607
608 /* set scan bit here for PAN params */
609 set_bit(STATUS_SCAN_HW, &priv->shrd->status);
610
611 ret = iwlagn_set_pan_params(priv);
612 if (ret)
613 return ret;
614
615 ret = iwl_trans_send_cmd(trans(priv), &cmd);
616 if (ret) {
617 clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
618 iwlagn_set_pan_params(priv);
619 }
620
621 return ret;
622 }
623
624 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
625 struct ieee80211_vif *vif, bool add)
626 {
627 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
628
629 if (add)
630 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
631 vif->bss_conf.bssid,
632 &vif_priv->ibss_bssid_sta_id);
633 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
634 vif->bss_conf.bssid);
635 }
636
637 #define IWL_FLUSH_WAIT_MS 2000
638
639 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
640 {
641 struct iwl_tx_queue *txq;
642 struct iwl_queue *q;
643 int cnt;
644 unsigned long now = jiffies;
645 int ret = 0;
646
647 /* waiting for all the tx frames complete might take a while */
648 for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++) {
649 if (cnt == priv->shrd->cmd_queue)
650 continue;
651 txq = &priv->txq[cnt];
652 q = &txq->q;
653 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
654 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
655 msleep(1);
656
657 if (q->read_ptr != q->write_ptr) {
658 IWL_ERR(priv, "fail to flush all tx fifo queues\n");
659 ret = -ETIMEDOUT;
660 break;
661 }
662 }
663 return ret;
664 }
665
666 #define IWL_TX_QUEUE_MSK 0xfffff
667
668 /**
669 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
670 *
671 * pre-requirements:
672 * 1. acquire mutex before calling
673 * 2. make sure rf is on and not in exit state
674 */
675 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
676 {
677 struct iwl_txfifo_flush_cmd flush_cmd;
678 struct iwl_host_cmd cmd = {
679 .id = REPLY_TXFIFO_FLUSH,
680 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
681 .flags = CMD_SYNC,
682 .data = { &flush_cmd, },
683 };
684
685 might_sleep();
686
687 memset(&flush_cmd, 0, sizeof(flush_cmd));
688 if (flush_control & BIT(IWL_RXON_CTX_BSS))
689 flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
690 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
691 IWL_SCD_MGMT_MSK;
692 if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
693 (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
694 flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
695 IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
696 IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
697 IWL_PAN_SCD_MULTICAST_MSK;
698
699 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
700 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
701
702 IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
703 flush_cmd.fifo_control);
704 flush_cmd.flush_control = cpu_to_le16(flush_control);
705
706 return iwl_trans_send_cmd(trans(priv), &cmd);
707 }
708
709 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
710 {
711 mutex_lock(&priv->shrd->mutex);
712 ieee80211_stop_queues(priv->hw);
713 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
714 IWL_ERR(priv, "flush request fail\n");
715 goto done;
716 }
717 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
718 iwlagn_wait_tx_queue_empty(priv);
719 done:
720 ieee80211_wake_queues(priv->hw);
721 mutex_unlock(&priv->shrd->mutex);
722 }
723
724 /*
725 * BT coex
726 */
727 /*
728 * Macros to access the lookup table.
729 *
730 * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
731 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
732 *
733 * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
734 *
735 * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
736 * one after another in 32-bit registers, and "registers" 0 through 7 contain
737 * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
738 *
739 * These macros encode that format.
740 */
741 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
742 wifi_txrx, wifi_sh_ant_req) \
743 (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
744 (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
745
746 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
747 lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
748 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
749 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
750 (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
751 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
752 wifi_sh_ant_req))))
753 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
754 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
755 LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
756 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
757 wifi_sh_ant_req))
758 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
759 wifi_req, wifi_prio, wifi_txrx, \
760 wifi_sh_ant_req) \
761 LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
762 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
763 wifi_sh_ant_req))
764
765 #define LUT_WLAN_KILL_OP(lut, op, val) \
766 lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
767 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
768 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
769 (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
770 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
771 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
772 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
773 LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
774 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
775 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
776 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
777 LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
778 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
779
780 #define LUT_ANT_SWITCH_OP(lut, op, val) \
781 lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
782 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
783 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
784 (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
785 wifi_req, wifi_prio, wifi_txrx, \
786 wifi_sh_ant_req))))
787 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
788 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
789 LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
790 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
791 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
792 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
793 LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
794 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
795
796 static const __le32 iwlagn_def_3w_lookup[12] = {
797 cpu_to_le32(0xaaaaaaaa),
798 cpu_to_le32(0xaaaaaaaa),
799 cpu_to_le32(0xaeaaaaaa),
800 cpu_to_le32(0xaaaaaaaa),
801 cpu_to_le32(0xcc00ff28),
802 cpu_to_le32(0x0000aaaa),
803 cpu_to_le32(0xcc00aaaa),
804 cpu_to_le32(0x0000aaaa),
805 cpu_to_le32(0xc0004000),
806 cpu_to_le32(0x00004000),
807 cpu_to_le32(0xf0005000),
808 cpu_to_le32(0xf0005000),
809 };
810
811 static const __le32 iwlagn_concurrent_lookup[12] = {
812 cpu_to_le32(0xaaaaaaaa),
813 cpu_to_le32(0xaaaaaaaa),
814 cpu_to_le32(0xaaaaaaaa),
815 cpu_to_le32(0xaaaaaaaa),
816 cpu_to_le32(0xaaaaaaaa),
817 cpu_to_le32(0xaaaaaaaa),
818 cpu_to_le32(0xaaaaaaaa),
819 cpu_to_le32(0xaaaaaaaa),
820 cpu_to_le32(0x00000000),
821 cpu_to_le32(0x00000000),
822 cpu_to_le32(0x00000000),
823 cpu_to_le32(0x00000000),
824 };
825
826 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
827 {
828 struct iwl_basic_bt_cmd basic = {
829 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
830 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
831 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
832 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
833 };
834 struct iwl6000_bt_cmd bt_cmd_6000;
835 struct iwl2000_bt_cmd bt_cmd_2000;
836 int ret;
837
838 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
839 sizeof(basic.bt3_lookup_table));
840
841 if (priv->cfg->bt_params) {
842 if (priv->cfg->bt_params->bt_session_2) {
843 bt_cmd_2000.prio_boost = cpu_to_le32(
844 priv->cfg->bt_params->bt_prio_boost);
845 bt_cmd_2000.tx_prio_boost = 0;
846 bt_cmd_2000.rx_prio_boost = 0;
847 } else {
848 bt_cmd_6000.prio_boost =
849 priv->cfg->bt_params->bt_prio_boost;
850 bt_cmd_6000.tx_prio_boost = 0;
851 bt_cmd_6000.rx_prio_boost = 0;
852 }
853 } else {
854 IWL_ERR(priv, "failed to construct BT Coex Config\n");
855 return;
856 }
857
858 basic.kill_ack_mask = priv->kill_ack_mask;
859 basic.kill_cts_mask = priv->kill_cts_mask;
860 basic.valid = priv->bt_valid;
861
862 /*
863 * Configure BT coex mode to "no coexistence" when the
864 * user disabled BT coexistence, we have no interface
865 * (might be in monitor mode), or the interface is in
866 * IBSS mode (no proper uCode support for coex then).
867 */
868 if (!iwlagn_mod_params.bt_coex_active ||
869 priv->iw_mode == NL80211_IFTYPE_ADHOC) {
870 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
871 } else {
872 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
873 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
874
875 if (!priv->bt_enable_pspoll)
876 basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
877 else
878 basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
879
880 if (priv->bt_ch_announce)
881 basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
882 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
883 }
884 priv->bt_enable_flag = basic.flags;
885 if (priv->bt_full_concurrent)
886 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
887 sizeof(iwlagn_concurrent_lookup));
888 else
889 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
890 sizeof(iwlagn_def_3w_lookup));
891
892 IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
893 basic.flags ? "active" : "disabled",
894 priv->bt_full_concurrent ?
895 "full concurrency" : "3-wire");
896
897 if (priv->cfg->bt_params->bt_session_2) {
898 memcpy(&bt_cmd_2000.basic, &basic,
899 sizeof(basic));
900 ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
901 CMD_SYNC, sizeof(bt_cmd_2000), &bt_cmd_2000);
902 } else {
903 memcpy(&bt_cmd_6000.basic, &basic,
904 sizeof(basic));
905 ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
906 CMD_SYNC, sizeof(bt_cmd_6000), &bt_cmd_6000);
907 }
908 if (ret)
909 IWL_ERR(priv, "failed to send BT Coex Config\n");
910
911 }
912
913 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
914 {
915 struct iwl_rxon_context *ctx, *found_ctx = NULL;
916 bool found_ap = false;
917
918 lockdep_assert_held(&priv->shrd->mutex);
919
920 /* Check whether AP or GO mode is active. */
921 if (rssi_ena) {
922 for_each_context(priv, ctx) {
923 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
924 iwl_is_associated_ctx(ctx)) {
925 found_ap = true;
926 break;
927 }
928 }
929 }
930
931 /*
932 * If disable was received or If GO/AP mode, disable RSSI
933 * measurements.
934 */
935 if (!rssi_ena || found_ap) {
936 if (priv->cur_rssi_ctx) {
937 ctx = priv->cur_rssi_ctx;
938 ieee80211_disable_rssi_reports(ctx->vif);
939 priv->cur_rssi_ctx = NULL;
940 }
941 return;
942 }
943
944 /*
945 * If rssi measurements need to be enabled, consider all cases now.
946 * Figure out how many contexts are active.
947 */
948 for_each_context(priv, ctx) {
949 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
950 iwl_is_associated_ctx(ctx)) {
951 found_ctx = ctx;
952 break;
953 }
954 }
955
956 /*
957 * rssi monitor already enabled for the correct interface...nothing
958 * to do.
959 */
960 if (found_ctx == priv->cur_rssi_ctx)
961 return;
962
963 /*
964 * Figure out if rssi monitor is currently enabled, and needs
965 * to be changed. If rssi monitor is already enabled, disable
966 * it first else just enable rssi measurements on the
967 * interface found above.
968 */
969 if (priv->cur_rssi_ctx) {
970 ctx = priv->cur_rssi_ctx;
971 if (ctx->vif)
972 ieee80211_disable_rssi_reports(ctx->vif);
973 }
974
975 priv->cur_rssi_ctx = found_ctx;
976
977 if (!found_ctx)
978 return;
979
980 ieee80211_enable_rssi_reports(found_ctx->vif,
981 IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
982 IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
983 }
984
985 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
986 {
987 return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
988 BT_UART_MSG_FRAME3SCOESCO_POS;
989 }
990
991 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
992 {
993 struct iwl_priv *priv =
994 container_of(work, struct iwl_priv, bt_traffic_change_work);
995 struct iwl_rxon_context *ctx;
996 int smps_request = -1;
997
998 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
999 /* bt coex disabled */
1000 return;
1001 }
1002
1003 /*
1004 * Note: bt_traffic_load can be overridden by scan complete and
1005 * coex profile notifications. Ignore that since only bad consequence
1006 * can be not matching debug print with actual state.
1007 */
1008 IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
1009 priv->bt_traffic_load);
1010
1011 switch (priv->bt_traffic_load) {
1012 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1013 if (priv->bt_status)
1014 smps_request = IEEE80211_SMPS_DYNAMIC;
1015 else
1016 smps_request = IEEE80211_SMPS_AUTOMATIC;
1017 break;
1018 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1019 smps_request = IEEE80211_SMPS_DYNAMIC;
1020 break;
1021 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1022 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1023 smps_request = IEEE80211_SMPS_STATIC;
1024 break;
1025 default:
1026 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1027 priv->bt_traffic_load);
1028 break;
1029 }
1030
1031 mutex_lock(&priv->shrd->mutex);
1032
1033 /*
1034 * We can not send command to firmware while scanning. When the scan
1035 * complete we will schedule this work again. We do check with mutex
1036 * locked to prevent new scan request to arrive. We do not check
1037 * STATUS_SCANNING to avoid race when queue_work two times from
1038 * different notifications, but quit and not perform any work at all.
1039 */
1040 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status))
1041 goto out;
1042
1043 iwl_update_chain_flags(priv);
1044
1045 if (smps_request != -1) {
1046 priv->current_ht_config.smps = smps_request;
1047 for_each_context(priv, ctx) {
1048 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1049 ieee80211_request_smps(ctx->vif, smps_request);
1050 }
1051 }
1052
1053 /*
1054 * Dynamic PS poll related functionality. Adjust RSSI measurements if
1055 * necessary.
1056 */
1057 iwlagn_bt_coex_rssi_monitor(priv);
1058 out:
1059 mutex_unlock(&priv->shrd->mutex);
1060 }
1061
1062 /*
1063 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
1064 * correct interface or disable it if this is the last interface to be
1065 * removed.
1066 */
1067 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
1068 {
1069 if (priv->bt_is_sco &&
1070 priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
1071 iwlagn_bt_adjust_rssi_monitor(priv, true);
1072 else
1073 iwlagn_bt_adjust_rssi_monitor(priv, false);
1074 }
1075
1076 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1077 struct iwl_bt_uart_msg *uart_msg)
1078 {
1079 IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
1080 "Update Req = 0x%X",
1081 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1082 BT_UART_MSG_FRAME1MSGTYPE_POS,
1083 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1084 BT_UART_MSG_FRAME1SSN_POS,
1085 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1086 BT_UART_MSG_FRAME1UPDATEREQ_POS);
1087
1088 IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1089 "Chl_SeqN = 0x%X, In band = 0x%X",
1090 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1091 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1092 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1093 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1094 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1095 BT_UART_MSG_FRAME2CHLSEQN_POS,
1096 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1097 BT_UART_MSG_FRAME2INBAND_POS);
1098
1099 IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1100 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1101 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1102 BT_UART_MSG_FRAME3SCOESCO_POS,
1103 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1104 BT_UART_MSG_FRAME3SNIFF_POS,
1105 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1106 BT_UART_MSG_FRAME3A2DP_POS,
1107 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1108 BT_UART_MSG_FRAME3ACL_POS,
1109 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1110 BT_UART_MSG_FRAME3MASTER_POS,
1111 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1112 BT_UART_MSG_FRAME3OBEX_POS);
1113
1114 IWL_DEBUG_COEX(priv, "Idle duration = 0x%X",
1115 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1116 BT_UART_MSG_FRAME4IDLEDURATION_POS);
1117
1118 IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1119 "eSCO Retransmissions = 0x%X",
1120 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1121 BT_UART_MSG_FRAME5TXACTIVITY_POS,
1122 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1123 BT_UART_MSG_FRAME5RXACTIVITY_POS,
1124 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1125 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1126
1127 IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1128 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1129 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1130 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1131 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1132
1133 IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
1134 "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
1135 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1136 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1137 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
1138 BT_UART_MSG_FRAME7PAGE_POS,
1139 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
1140 BT_UART_MSG_FRAME7INQUIRY_POS,
1141 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1142 BT_UART_MSG_FRAME7CONNECTABLE_POS);
1143 }
1144
1145 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
1146 struct iwl_bt_uart_msg *uart_msg)
1147 {
1148 u8 kill_msk;
1149 static const __le32 bt_kill_ack_msg[2] = {
1150 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
1151 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1152 static const __le32 bt_kill_cts_msg[2] = {
1153 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
1154 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1155
1156 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
1157 ? 1 : 0;
1158 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
1159 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
1160 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
1161 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
1162 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
1163 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
1164
1165 /* schedule to send runtime bt_config */
1166 queue_work(priv->shrd->workqueue, &priv->bt_runtime_config);
1167 }
1168 }
1169
1170 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
1171 struct iwl_rx_mem_buffer *rxb)
1172 {
1173 unsigned long flags;
1174 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1175 struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
1176 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
1177
1178 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1179 /* bt coex disabled */
1180 return;
1181 }
1182
1183 IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
1184 IWL_DEBUG_COEX(priv, " status: %d\n", coex->bt_status);
1185 IWL_DEBUG_COEX(priv, " traffic load: %d\n", coex->bt_traffic_load);
1186 IWL_DEBUG_COEX(priv, " CI compliance: %d\n",
1187 coex->bt_ci_compliance);
1188 iwlagn_print_uartmsg(priv, uart_msg);
1189
1190 priv->last_bt_traffic_load = priv->bt_traffic_load;
1191 priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
1192
1193 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
1194 if (priv->bt_status != coex->bt_status ||
1195 priv->last_bt_traffic_load != coex->bt_traffic_load) {
1196 if (coex->bt_status) {
1197 /* BT on */
1198 if (!priv->bt_ch_announce)
1199 priv->bt_traffic_load =
1200 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1201 else
1202 priv->bt_traffic_load =
1203 coex->bt_traffic_load;
1204 } else {
1205 /* BT off */
1206 priv->bt_traffic_load =
1207 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
1208 }
1209 priv->bt_status = coex->bt_status;
1210 queue_work(priv->shrd->workqueue,
1211 &priv->bt_traffic_change_work);
1212 }
1213 }
1214
1215 iwlagn_set_kill_msk(priv, uart_msg);
1216
1217 /* FIXME: based on notification, adjust the prio_boost */
1218
1219 spin_lock_irqsave(&priv->shrd->lock, flags);
1220 priv->bt_ci_compliance = coex->bt_ci_compliance;
1221 spin_unlock_irqrestore(&priv->shrd->lock, flags);
1222 }
1223
1224 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
1225 {
1226 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
1227 iwlagn_bt_coex_profile_notif;
1228 }
1229
1230 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
1231 {
1232 INIT_WORK(&priv->bt_traffic_change_work,
1233 iwlagn_bt_traffic_change_work);
1234 }
1235
1236 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
1237 {
1238 cancel_work_sync(&priv->bt_traffic_change_work);
1239 }
1240
1241 static bool is_single_rx_stream(struct iwl_priv *priv)
1242 {
1243 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1244 priv->current_ht_config.single_chain_sufficient;
1245 }
1246
1247 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
1248 #define IWL_NUM_RX_CHAINS_SINGLE 2
1249 #define IWL_NUM_IDLE_CHAINS_DUAL 2
1250 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
1251
1252 /*
1253 * Determine how many receiver/antenna chains to use.
1254 *
1255 * More provides better reception via diversity. Fewer saves power
1256 * at the expense of throughput, but only when not in powersave to
1257 * start with.
1258 *
1259 * MIMO (dual stream) requires at least 2, but works better with 3.
1260 * This does not determine *which* chains to use, just how many.
1261 */
1262 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1263 {
1264 if (priv->cfg->bt_params &&
1265 priv->cfg->bt_params->advanced_bt_coexist &&
1266 (priv->bt_full_concurrent ||
1267 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1268 /*
1269 * only use chain 'A' in bt high traffic load or
1270 * full concurrency mode
1271 */
1272 return IWL_NUM_RX_CHAINS_SINGLE;
1273 }
1274 /* # of Rx chains to use when expecting MIMO. */
1275 if (is_single_rx_stream(priv))
1276 return IWL_NUM_RX_CHAINS_SINGLE;
1277 else
1278 return IWL_NUM_RX_CHAINS_MULTIPLE;
1279 }
1280
1281 /*
1282 * When we are in power saving mode, unless device support spatial
1283 * multiplexing power save, use the active count for rx chain count.
1284 */
1285 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1286 {
1287 /* # Rx chains when idling, depending on SMPS mode */
1288 switch (priv->current_ht_config.smps) {
1289 case IEEE80211_SMPS_STATIC:
1290 case IEEE80211_SMPS_DYNAMIC:
1291 return IWL_NUM_IDLE_CHAINS_SINGLE;
1292 case IEEE80211_SMPS_OFF:
1293 return active_cnt;
1294 default:
1295 WARN(1, "invalid SMPS mode %d",
1296 priv->current_ht_config.smps);
1297 return active_cnt;
1298 }
1299 }
1300
1301 /* up to 4 chains */
1302 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1303 {
1304 u8 res;
1305 res = (chain_bitmap & BIT(0)) >> 0;
1306 res += (chain_bitmap & BIT(1)) >> 1;
1307 res += (chain_bitmap & BIT(2)) >> 2;
1308 res += (chain_bitmap & BIT(3)) >> 3;
1309 return res;
1310 }
1311
1312 /**
1313 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1314 *
1315 * Selects how many and which Rx receivers/antennas/chains to use.
1316 * This should not be used for scan command ... it puts data in wrong place.
1317 */
1318 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1319 {
1320 bool is_single = is_single_rx_stream(priv);
1321 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->shrd->status);
1322 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1323 u32 active_chains;
1324 u16 rx_chain;
1325
1326 /* Tell uCode which antennas are actually connected.
1327 * Before first association, we assume all antennas are connected.
1328 * Just after first association, iwl_chain_noise_calibration()
1329 * checks which antennas actually *are* connected. */
1330 if (priv->chain_noise_data.active_chains)
1331 active_chains = priv->chain_noise_data.active_chains;
1332 else
1333 active_chains = hw_params(priv).valid_rx_ant;
1334
1335 if (priv->cfg->bt_params &&
1336 priv->cfg->bt_params->advanced_bt_coexist &&
1337 (priv->bt_full_concurrent ||
1338 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1339 /*
1340 * only use chain 'A' in bt high traffic load or
1341 * full concurrency mode
1342 */
1343 active_chains = first_antenna(active_chains);
1344 }
1345
1346 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1347
1348 /* How many receivers should we use? */
1349 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1350 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1351
1352
1353 /* correct rx chain count according hw settings
1354 * and chain noise calibration
1355 */
1356 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1357 if (valid_rx_cnt < active_rx_cnt)
1358 active_rx_cnt = valid_rx_cnt;
1359
1360 if (valid_rx_cnt < idle_rx_cnt)
1361 idle_rx_cnt = valid_rx_cnt;
1362
1363 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1364 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1365
1366 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
1367
1368 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1369 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1370 else
1371 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1372
1373 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1374 ctx->staging.rx_chain,
1375 active_rx_cnt, idle_rx_cnt);
1376
1377 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1378 active_rx_cnt < idle_rx_cnt);
1379 }
1380
1381 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
1382 {
1383 int i;
1384 u8 ind = ant;
1385
1386 if (priv->band == IEEE80211_BAND_2GHZ &&
1387 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
1388 return 0;
1389
1390 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
1391 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
1392 if (valid & BIT(ind))
1393 return ind;
1394 }
1395 return ant;
1396 }
1397
1398 static const char *get_csr_string(int cmd)
1399 {
1400 switch (cmd) {
1401 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1402 IWL_CMD(CSR_INT_COALESCING);
1403 IWL_CMD(CSR_INT);
1404 IWL_CMD(CSR_INT_MASK);
1405 IWL_CMD(CSR_FH_INT_STATUS);
1406 IWL_CMD(CSR_GPIO_IN);
1407 IWL_CMD(CSR_RESET);
1408 IWL_CMD(CSR_GP_CNTRL);
1409 IWL_CMD(CSR_HW_REV);
1410 IWL_CMD(CSR_EEPROM_REG);
1411 IWL_CMD(CSR_EEPROM_GP);
1412 IWL_CMD(CSR_OTP_GP_REG);
1413 IWL_CMD(CSR_GIO_REG);
1414 IWL_CMD(CSR_GP_UCODE_REG);
1415 IWL_CMD(CSR_GP_DRIVER_REG);
1416 IWL_CMD(CSR_UCODE_DRV_GP1);
1417 IWL_CMD(CSR_UCODE_DRV_GP2);
1418 IWL_CMD(CSR_LED_REG);
1419 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1420 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1421 IWL_CMD(CSR_ANA_PLL_CFG);
1422 IWL_CMD(CSR_HW_REV_WA_REG);
1423 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1424 default:
1425 return "UNKNOWN";
1426 }
1427 }
1428
1429 void iwl_dump_csr(struct iwl_priv *priv)
1430 {
1431 int i;
1432 static const u32 csr_tbl[] = {
1433 CSR_HW_IF_CONFIG_REG,
1434 CSR_INT_COALESCING,
1435 CSR_INT,
1436 CSR_INT_MASK,
1437 CSR_FH_INT_STATUS,
1438 CSR_GPIO_IN,
1439 CSR_RESET,
1440 CSR_GP_CNTRL,
1441 CSR_HW_REV,
1442 CSR_EEPROM_REG,
1443 CSR_EEPROM_GP,
1444 CSR_OTP_GP_REG,
1445 CSR_GIO_REG,
1446 CSR_GP_UCODE_REG,
1447 CSR_GP_DRIVER_REG,
1448 CSR_UCODE_DRV_GP1,
1449 CSR_UCODE_DRV_GP2,
1450 CSR_LED_REG,
1451 CSR_DRAM_INT_TBL_REG,
1452 CSR_GIO_CHICKEN_BITS,
1453 CSR_ANA_PLL_CFG,
1454 CSR_HW_REV_WA_REG,
1455 CSR_DBG_HPET_MEM_REG
1456 };
1457 IWL_ERR(priv, "CSR values:\n");
1458 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
1459 "CSR_INT_PERIODIC_REG)\n");
1460 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
1461 IWL_ERR(priv, " %25s: 0X%08x\n",
1462 get_csr_string(csr_tbl[i]),
1463 iwl_read32(priv, csr_tbl[i]));
1464 }
1465 }
1466
1467 static const char *get_fh_string(int cmd)
1468 {
1469 switch (cmd) {
1470 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1471 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1472 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1473 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1474 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1475 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1476 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1477 IWL_CMD(FH_TSSR_TX_STATUS_REG);
1478 IWL_CMD(FH_TSSR_TX_ERROR_REG);
1479 default:
1480 return "UNKNOWN";
1481 }
1482 }
1483
1484 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
1485 {
1486 int i;
1487 #ifdef CONFIG_IWLWIFI_DEBUG
1488 int pos = 0;
1489 size_t bufsz = 0;
1490 #endif
1491 static const u32 fh_tbl[] = {
1492 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1493 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1494 FH_RSCSR_CHNL0_WPTR,
1495 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1496 FH_MEM_RSSR_SHARED_CTRL_REG,
1497 FH_MEM_RSSR_RX_STATUS_REG,
1498 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1499 FH_TSSR_TX_STATUS_REG,
1500 FH_TSSR_TX_ERROR_REG
1501 };
1502 #ifdef CONFIG_IWLWIFI_DEBUG
1503 if (display) {
1504 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1505 *buf = kmalloc(bufsz, GFP_KERNEL);
1506 if (!*buf)
1507 return -ENOMEM;
1508 pos += scnprintf(*buf + pos, bufsz - pos,
1509 "FH register values:\n");
1510 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1511 pos += scnprintf(*buf + pos, bufsz - pos,
1512 " %34s: 0X%08x\n",
1513 get_fh_string(fh_tbl[i]),
1514 iwl_read_direct32(priv, fh_tbl[i]));
1515 }
1516 return pos;
1517 }
1518 #endif
1519 IWL_ERR(priv, "FH register values:\n");
1520 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1521 IWL_ERR(priv, " %34s: 0X%08x\n",
1522 get_fh_string(fh_tbl[i]),
1523 iwl_read_direct32(priv, fh_tbl[i]));
1524 }
1525 return 0;
1526 }
1527
1528 /* notification wait support */
1529 void iwlagn_init_notification_wait(struct iwl_priv *priv,
1530 struct iwl_notification_wait *wait_entry,
1531 u8 cmd,
1532 void (*fn)(struct iwl_priv *priv,
1533 struct iwl_rx_packet *pkt,
1534 void *data),
1535 void *fn_data)
1536 {
1537 wait_entry->fn = fn;
1538 wait_entry->fn_data = fn_data;
1539 wait_entry->cmd = cmd;
1540 wait_entry->triggered = false;
1541 wait_entry->aborted = false;
1542
1543 spin_lock_bh(&priv->notif_wait_lock);
1544 list_add(&wait_entry->list, &priv->notif_waits);
1545 spin_unlock_bh(&priv->notif_wait_lock);
1546 }
1547
1548 int iwlagn_wait_notification(struct iwl_priv *priv,
1549 struct iwl_notification_wait *wait_entry,
1550 unsigned long timeout)
1551 {
1552 int ret;
1553
1554 ret = wait_event_timeout(priv->notif_waitq,
1555 wait_entry->triggered || wait_entry->aborted,
1556 timeout);
1557
1558 spin_lock_bh(&priv->notif_wait_lock);
1559 list_del(&wait_entry->list);
1560 spin_unlock_bh(&priv->notif_wait_lock);
1561
1562 if (wait_entry->aborted)
1563 return -EIO;
1564
1565 /* return value is always >= 0 */
1566 if (ret <= 0)
1567 return -ETIMEDOUT;
1568 return 0;
1569 }
1570
1571 void iwlagn_remove_notification(struct iwl_priv *priv,
1572 struct iwl_notification_wait *wait_entry)
1573 {
1574 spin_lock_bh(&priv->notif_wait_lock);
1575 list_del(&wait_entry->list);
1576 spin_unlock_bh(&priv->notif_wait_lock);
1577 }
Linux kernel - Deliverables
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