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Merge branch 'akpm'
[linux-2.6/next.git] / drivers / net / wireless / iwlwifi / iwl-agn-lib.c
blob4edb6cfc5488d05f871048bb1f17a3b6d64b78ae
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
44 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
45 {
46 return le32_to_cpup((__le32 *)&tx_resp->status +
47 tx_resp->frame_count) & MAX_SN;
48 }
49
50 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
51 {
52 status &= TX_STATUS_MSK;
53
54 switch (status) {
55 case TX_STATUS_POSTPONE_DELAY:
56 priv->reply_tx_stats.pp_delay++;
57 break;
58 case TX_STATUS_POSTPONE_FEW_BYTES:
59 priv->reply_tx_stats.pp_few_bytes++;
60 break;
61 case TX_STATUS_POSTPONE_BT_PRIO:
62 priv->reply_tx_stats.pp_bt_prio++;
63 break;
64 case TX_STATUS_POSTPONE_QUIET_PERIOD:
65 priv->reply_tx_stats.pp_quiet_period++;
66 break;
67 case TX_STATUS_POSTPONE_CALC_TTAK:
68 priv->reply_tx_stats.pp_calc_ttak++;
69 break;
70 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
71 priv->reply_tx_stats.int_crossed_retry++;
72 break;
73 case TX_STATUS_FAIL_SHORT_LIMIT:
74 priv->reply_tx_stats.short_limit++;
75 break;
76 case TX_STATUS_FAIL_LONG_LIMIT:
77 priv->reply_tx_stats.long_limit++;
78 break;
79 case TX_STATUS_FAIL_FIFO_UNDERRUN:
80 priv->reply_tx_stats.fifo_underrun++;
81 break;
82 case TX_STATUS_FAIL_DRAIN_FLOW:
83 priv->reply_tx_stats.drain_flow++;
84 break;
85 case TX_STATUS_FAIL_RFKILL_FLUSH:
86 priv->reply_tx_stats.rfkill_flush++;
87 break;
88 case TX_STATUS_FAIL_LIFE_EXPIRE:
89 priv->reply_tx_stats.life_expire++;
90 break;
91 case TX_STATUS_FAIL_DEST_PS:
92 priv->reply_tx_stats.dest_ps++;
93 break;
94 case TX_STATUS_FAIL_HOST_ABORTED:
95 priv->reply_tx_stats.host_abort++;
96 break;
97 case TX_STATUS_FAIL_BT_RETRY:
98 priv->reply_tx_stats.bt_retry++;
99 break;
100 case TX_STATUS_FAIL_STA_INVALID:
101 priv->reply_tx_stats.sta_invalid++;
102 break;
103 case TX_STATUS_FAIL_FRAG_DROPPED:
104 priv->reply_tx_stats.frag_drop++;
105 break;
106 case TX_STATUS_FAIL_TID_DISABLE:
107 priv->reply_tx_stats.tid_disable++;
108 break;
109 case TX_STATUS_FAIL_FIFO_FLUSHED:
110 priv->reply_tx_stats.fifo_flush++;
111 break;
112 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
113 priv->reply_tx_stats.insuff_cf_poll++;
114 break;
115 case TX_STATUS_FAIL_PASSIVE_NO_RX:
116 priv->reply_tx_stats.fail_hw_drop++;
117 break;
118 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
119 priv->reply_tx_stats.sta_color_mismatch++;
120 break;
121 default:
122 priv->reply_tx_stats.unknown++;
123 break;
124 }
125 }
126
127 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
128 {
129 status &= AGG_TX_STATUS_MSK;
130
131 switch (status) {
132 case AGG_TX_STATE_UNDERRUN_MSK:
133 priv->reply_agg_tx_stats.underrun++;
134 break;
135 case AGG_TX_STATE_BT_PRIO_MSK:
136 priv->reply_agg_tx_stats.bt_prio++;
137 break;
138 case AGG_TX_STATE_FEW_BYTES_MSK:
139 priv->reply_agg_tx_stats.few_bytes++;
140 break;
141 case AGG_TX_STATE_ABORT_MSK:
142 priv->reply_agg_tx_stats.abort++;
143 break;
144 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
145 priv->reply_agg_tx_stats.last_sent_ttl++;
146 break;
147 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
148 priv->reply_agg_tx_stats.last_sent_try++;
149 break;
150 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
151 priv->reply_agg_tx_stats.last_sent_bt_kill++;
152 break;
153 case AGG_TX_STATE_SCD_QUERY_MSK:
154 priv->reply_agg_tx_stats.scd_query++;
155 break;
156 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
157 priv->reply_agg_tx_stats.bad_crc32++;
158 break;
159 case AGG_TX_STATE_RESPONSE_MSK:
160 priv->reply_agg_tx_stats.response++;
161 break;
162 case AGG_TX_STATE_DUMP_TX_MSK:
163 priv->reply_agg_tx_stats.dump_tx++;
164 break;
165 case AGG_TX_STATE_DELAY_TX_MSK:
166 priv->reply_agg_tx_stats.delay_tx++;
167 break;
168 default:
169 priv->reply_agg_tx_stats.unknown++;
170 break;
171 }
172 }
173
174 static void iwlagn_set_tx_status(struct iwl_priv *priv,
175 struct ieee80211_tx_info *info,
176 struct iwl_rxon_context *ctx,
177 struct iwlagn_tx_resp *tx_resp,
178 int txq_id, bool is_agg)
179 {
180 u16 status = le16_to_cpu(tx_resp->status.status);
181
182 info->status.rates[0].count = tx_resp->failure_frame + 1;
183 if (is_agg)
184 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
185 info->flags |= iwl_tx_status_to_mac80211(status);
186 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
187 info);
188 if (!iwl_is_tx_success(status))
189 iwlagn_count_tx_err_status(priv, status);
190
191 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
192 iwl_is_associated_ctx(ctx) && ctx->vif &&
193 ctx->vif->type == NL80211_IFTYPE_STATION) {
194 ctx->last_tx_rejected = true;
195 iwl_stop_queue(priv, &priv->txq[txq_id]);
196 }
197
198 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
199 "0x%x retries %d\n",
200 txq_id,
201 iwl_get_tx_fail_reason(status), status,
202 le32_to_cpu(tx_resp->rate_n_flags),
203 tx_resp->failure_frame);
204 }
205
206 #ifdef CONFIG_IWLWIFI_DEBUG
207 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
208
209 const char *iwl_get_agg_tx_fail_reason(u16 status)
210 {
211 status &= AGG_TX_STATUS_MSK;
212 switch (status) {
213 case AGG_TX_STATE_TRANSMITTED:
214 return "SUCCESS";
215 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
216 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
217 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
218 AGG_TX_STATE_FAIL(ABORT_MSK);
219 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
220 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
221 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
222 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
223 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
224 AGG_TX_STATE_FAIL(RESPONSE_MSK);
225 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
226 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
227 }
228
229 return "UNKNOWN";
230 }
231 #endif /* CONFIG_IWLWIFI_DEBUG */
232
233 static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
234 struct iwl_ht_agg *agg,
235 struct iwlagn_tx_resp *tx_resp,
236 int txq_id, u16 start_idx)
237 {
238 u16 status;
239 struct agg_tx_status *frame_status = &tx_resp->status;
240 struct ieee80211_hdr *hdr = NULL;
241 int i, sh, idx;
242 u16 seq;
243
244 if (agg->wait_for_ba)
245 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
246
247 agg->frame_count = tx_resp->frame_count;
248 agg->start_idx = start_idx;
249 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
250 agg->bitmap = 0;
251
252 /* # frames attempted by Tx command */
253 if (agg->frame_count == 1) {
254 struct iwl_tx_info *txb;
255
256 /* Only one frame was attempted; no block-ack will arrive */
257 idx = start_idx;
258
259 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
260 agg->frame_count, agg->start_idx, idx);
261 txb = &priv->txq[txq_id].txb[idx];
262 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb),
263 txb->ctx, tx_resp, txq_id, true);
264 agg->wait_for_ba = 0;
265 } else {
266 /* Two or more frames were attempted; expect block-ack */
267 u64 bitmap = 0;
268
269 /*
270 * Start is the lowest frame sent. It may not be the first
271 * frame in the batch; we figure this out dynamically during
272 * the following loop.
273 */
274 int start = agg->start_idx;
275
276 /* Construct bit-map of pending frames within Tx window */
277 for (i = 0; i < agg->frame_count; i++) {
278 u16 sc;
279 status = le16_to_cpu(frame_status[i].status);
280 seq = le16_to_cpu(frame_status[i].sequence);
281 idx = SEQ_TO_INDEX(seq);
282 txq_id = SEQ_TO_QUEUE(seq);
283
284 if (status & AGG_TX_STATUS_MSK)
285 iwlagn_count_agg_tx_err_status(priv, status);
286
287 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
288 AGG_TX_STATE_ABORT_MSK))
289 continue;
290
291 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
292 agg->frame_count, txq_id, idx);
293 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
294 "try-count (0x%08x)\n",
295 iwl_get_agg_tx_fail_reason(status),
296 status & AGG_TX_STATUS_MSK,
297 status & AGG_TX_TRY_MSK);
298
299 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
300 if (!hdr) {
301 IWL_ERR(priv,
302 "BUG_ON idx doesn't point to valid skb"
303 " idx=%d, txq_id=%d\n", idx, txq_id);
304 return -1;
305 }
306
307 sc = le16_to_cpu(hdr->seq_ctrl);
308 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
309 IWL_ERR(priv,
310 "BUG_ON idx doesn't match seq control"
311 " idx=%d, seq_idx=%d, seq=%d\n",
312 idx, SEQ_TO_SN(sc),
313 hdr->seq_ctrl);
314 return -1;
315 }
316
317 IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
318 i, idx, SEQ_TO_SN(sc));
319
320 /*
321 * sh -> how many frames ahead of the starting frame is
322 * the current one?
323 *
324 * Note that all frames sent in the batch must be in a
325 * 64-frame window, so this number should be in [0,63].
326 * If outside of this window, then we've found a new
327 * "first" frame in the batch and need to change start.
328 */
329 sh = idx - start;
330
331 /*
332 * If >= 64, out of window. start must be at the front
333 * of the circular buffer, idx must be near the end of
334 * the buffer, and idx is the new "first" frame. Shift
335 * the indices around.
336 */
337 if (sh >= 64) {
338 /* Shift bitmap by start - idx, wrapped */
339 sh = 0x100 - idx + start;
340 bitmap = bitmap << sh;
341 /* Now idx is the new start so sh = 0 */
342 sh = 0;
343 start = idx;
344 /*
345 * If <= -64 then wraps the 256-pkt circular buffer
346 * (e.g., start = 255 and idx = 0, sh should be 1)
347 */
348 } else if (sh <= -64) {
349 sh = 0x100 - start + idx;
350 /*
351 * If < 0 but > -64, out of window. idx is before start
352 * but not wrapped. Shift the indices around.
353 */
354 } else if (sh < 0) {
355 /* Shift by how far start is ahead of idx */
356 sh = start - idx;
357 bitmap = bitmap << sh;
358 /* Now idx is the new start so sh = 0 */
359 start = idx;
360 sh = 0;
361 }
362 /* Sequence number start + sh was sent in this batch */
363 bitmap |= 1ULL << sh;
364 IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
365 start, (unsigned long long)bitmap);
366 }
367
368 /*
369 * Store the bitmap and possibly the new start, if we wrapped
370 * the buffer above
371 */
372 agg->bitmap = bitmap;
373 agg->start_idx = start;
374 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
375 agg->frame_count, agg->start_idx,
376 (unsigned long long)agg->bitmap);
377
378 if (bitmap)
379 agg->wait_for_ba = 1;
380 }
381 return 0;
382 }
383
384 void iwl_check_abort_status(struct iwl_priv *priv,
385 u8 frame_count, u32 status)
386 {
387 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
388 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
389 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
390 queue_work(priv->workqueue, &priv->tx_flush);
391 }
392 }
393
394 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
395 {
396 struct iwl_rx_packet *pkt = rxb_addr(rxb);
397 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
398 int txq_id = SEQ_TO_QUEUE(sequence);
399 int index = SEQ_TO_INDEX(sequence);
400 struct iwl_tx_queue *txq = &priv->txq[txq_id];
401 struct ieee80211_tx_info *info;
402 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
403 struct ieee80211_hdr *hdr;
404 struct iwl_tx_info *txb;
405 u32 status = le16_to_cpu(tx_resp->status.status);
406 int tid;
407 int sta_id;
408 int freed;
409 unsigned long flags;
410
411 if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
412 IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
413 "index %d is out of range [0-%d] %d %d\n", __func__,
414 txq_id, index, txq->q.n_bd, txq->q.write_ptr,
415 txq->q.read_ptr);
416 return;
417 }
418
419 txq->time_stamp = jiffies;
420 txb = &txq->txb[txq->q.read_ptr];
421 info = IEEE80211_SKB_CB(txb->skb);
422 memset(&info->status, 0, sizeof(info->status));
423
424 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
425 IWLAGN_TX_RES_TID_POS;
426 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
427 IWLAGN_TX_RES_RA_POS;
428
429 spin_lock_irqsave(&priv->sta_lock, flags);
430
431 hdr = (void *)txb->skb->data;
432 if (!ieee80211_is_data_qos(hdr->frame_control))
433 priv->last_seq_ctl = tx_resp->seq_ctl;
434
435 if (txq->sched_retry) {
436 const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
437 struct iwl_ht_agg *agg;
438
439 agg = &priv->stations[sta_id].tid[tid].agg;
440 /*
441 * If the BT kill count is non-zero, we'll get this
442 * notification again.
443 */
444 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
445 priv->cfg->bt_params &&
446 priv->cfg->bt_params->advanced_bt_coexist) {
447 IWL_DEBUG_COEX(priv, "receive reply tx with bt_kill\n");
448 }
449 iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
450
451 /* check if BAR is needed */
452 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
453 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
454
455 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
456 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
457 IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
458 "scd_ssn=%d idx=%d txq=%d swq=%d\n",
459 scd_ssn , index, txq_id, txq->swq_id);
460
461 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
462 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
463
464 if (priv->mac80211_registered &&
465 (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
466 (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
467 iwl_wake_queue(priv, txq);
468 }
469 } else {
470 iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp,
471 txq_id, false);
472 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
473 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
474
475 if (priv->mac80211_registered &&
476 iwl_queue_space(&txq->q) > txq->q.low_mark &&
477 status != TX_STATUS_FAIL_PASSIVE_NO_RX)
478 iwl_wake_queue(priv, txq);
479 }
480
481 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
482
483 iwl_check_abort_status(priv, tx_resp->frame_count, status);
484 spin_unlock_irqrestore(&priv->sta_lock, flags);
485 }
486
487 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
488 {
489 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
490 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
491 }
492
493 int iwlagn_send_tx_power(struct iwl_priv *priv)
494 {
495 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
496 u8 tx_ant_cfg_cmd;
497
498 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
499 "TX Power requested while scanning!\n"))
500 return -EAGAIN;
501
502 /* half dBm need to multiply */
503 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
504
505 if (priv->tx_power_lmt_in_half_dbm &&
506 priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
507 /*
508 * For the newer devices which using enhanced/extend tx power
509 * table in EEPROM, the format is in half dBm. driver need to
510 * convert to dBm format before report to mac80211.
511 * By doing so, there is a possibility of 1/2 dBm resolution
512 * lost. driver will perform "round-up" operation before
513 * reporting, but it will cause 1/2 dBm tx power over the
514 * regulatory limit. Perform the checking here, if the
515 * "tx_power_user_lmt" is higher than EEPROM value (in
516 * half-dBm format), lower the tx power based on EEPROM
517 */
518 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
519 }
520 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
521 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
522
523 if (IWL_UCODE_API(priv->ucode_ver) == 1)
524 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
525 else
526 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
527
528 return trans_send_cmd_pdu(&priv->trans, tx_ant_cfg_cmd, CMD_SYNC,
529 sizeof(tx_power_cmd), &tx_power_cmd);
530 }
531
532 void iwlagn_temperature(struct iwl_priv *priv)
533 {
534 /* store temperature from correct statistics (in Celsius) */
535 priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
536 iwl_tt_handler(priv);
537 }
538
539 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
540 {
541 struct iwl_eeprom_calib_hdr {
542 u8 version;
543 u8 pa_type;
544 u16 voltage;
545 } *hdr;
546
547 hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
548 EEPROM_CALIB_ALL);
549 return hdr->version;
550
551 }
552
553 /*
554 * EEPROM
555 */
556 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
557 {
558 u16 offset = 0;
559
560 if ((address & INDIRECT_ADDRESS) == 0)
561 return address;
562
563 switch (address & INDIRECT_TYPE_MSK) {
564 case INDIRECT_HOST:
565 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
566 break;
567 case INDIRECT_GENERAL:
568 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
569 break;
570 case INDIRECT_REGULATORY:
571 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
572 break;
573 case INDIRECT_TXP_LIMIT:
574 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
575 break;
576 case INDIRECT_TXP_LIMIT_SIZE:
577 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
578 break;
579 case INDIRECT_CALIBRATION:
580 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
581 break;
582 case INDIRECT_PROCESS_ADJST:
583 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
584 break;
585 case INDIRECT_OTHERS:
586 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
587 break;
588 default:
589 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
590 address & INDIRECT_TYPE_MSK);
591 break;
592 }
593
594 /* translate the offset from words to byte */
595 return (address & ADDRESS_MSK) + (offset << 1);
596 }
597
598 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
599 {
600 u32 address = eeprom_indirect_address(priv, offset);
601 BUG_ON(address >= priv->cfg->base_params->eeprom_size);
602 return &priv->eeprom[address];
603 }
604
605 struct iwl_mod_params iwlagn_mod_params = {
606 .amsdu_size_8K = 1,
607 .restart_fw = 1,
608 .plcp_check = true,
609 .bt_coex_active = true,
610 .no_sleep_autoadjust = true,
611 .power_level = IWL_POWER_INDEX_1,
612 /* the rest are 0 by default */
613 };
614
615 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
616 {
617 int idx = 0;
618 int band_offset = 0;
619
620 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
621 if (rate_n_flags & RATE_MCS_HT_MSK) {
622 idx = (rate_n_flags & 0xff);
623 return idx;
624 /* Legacy rate format, search for match in table */
625 } else {
626 if (band == IEEE80211_BAND_5GHZ)
627 band_offset = IWL_FIRST_OFDM_RATE;
628 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
629 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
630 return idx - band_offset;
631 }
632
633 return -1;
634 }
635
636 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
637 struct ieee80211_vif *vif,
638 enum ieee80211_band band,
639 struct iwl_scan_channel *scan_ch)
640 {
641 const struct ieee80211_supported_band *sband;
642 u16 passive_dwell = 0;
643 u16 active_dwell = 0;
644 int added = 0;
645 u16 channel = 0;
646
647 sband = iwl_get_hw_mode(priv, band);
648 if (!sband) {
649 IWL_ERR(priv, "invalid band\n");
650 return added;
651 }
652
653 active_dwell = iwl_get_active_dwell_time(priv, band, 0);
654 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
655
656 if (passive_dwell <= active_dwell)
657 passive_dwell = active_dwell + 1;
658
659 channel = iwl_get_single_channel_number(priv, band);
660 if (channel) {
661 scan_ch->channel = cpu_to_le16(channel);
662 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
663 scan_ch->active_dwell = cpu_to_le16(active_dwell);
664 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
665 /* Set txpower levels to defaults */
666 scan_ch->dsp_atten = 110;
667 if (band == IEEE80211_BAND_5GHZ)
668 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
669 else
670 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
671 added++;
672 } else
673 IWL_ERR(priv, "no valid channel found\n");
674 return added;
675 }
676
677 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
678 struct ieee80211_vif *vif,
679 enum ieee80211_band band,
680 u8 is_active, u8 n_probes,
681 struct iwl_scan_channel *scan_ch)
682 {
683 struct ieee80211_channel *chan;
684 const struct ieee80211_supported_band *sband;
685 const struct iwl_channel_info *ch_info;
686 u16 passive_dwell = 0;
687 u16 active_dwell = 0;
688 int added, i;
689 u16 channel;
690
691 sband = iwl_get_hw_mode(priv, band);
692 if (!sband)
693 return 0;
694
695 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
696 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
697
698 if (passive_dwell <= active_dwell)
699 passive_dwell = active_dwell + 1;
700
701 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
702 chan = priv->scan_request->channels[i];
703
704 if (chan->band != band)
705 continue;
706
707 channel = chan->hw_value;
708 scan_ch->channel = cpu_to_le16(channel);
709
710 ch_info = iwl_get_channel_info(priv, band, channel);
711 if (!is_channel_valid(ch_info)) {
712 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
713 channel);
714 continue;
715 }
716
717 if (!is_active || is_channel_passive(ch_info) ||
718 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
719 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
720 else
721 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
722
723 if (n_probes)
724 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
725
726 scan_ch->active_dwell = cpu_to_le16(active_dwell);
727 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
728
729 /* Set txpower levels to defaults */
730 scan_ch->dsp_atten = 110;
731
732 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
733 * power level:
734 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
735 */
736 if (band == IEEE80211_BAND_5GHZ)
737 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
738 else
739 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
740
741 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
742 channel, le32_to_cpu(scan_ch->type),
743 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
744 "ACTIVE" : "PASSIVE",
745 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
746 active_dwell : passive_dwell);
747
748 scan_ch++;
749 added++;
750 }
751
752 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
753 return added;
754 }
755
756 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
757 {
758 struct iwl_host_cmd cmd = {
759 .id = REPLY_SCAN_CMD,
760 .len = { sizeof(struct iwl_scan_cmd), },
761 .flags = CMD_SYNC,
762 };
763 struct iwl_scan_cmd *scan;
764 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
765 u32 rate_flags = 0;
766 u16 cmd_len;
767 u16 rx_chain = 0;
768 enum ieee80211_band band;
769 u8 n_probes = 0;
770 u8 rx_ant = priv->hw_params.valid_rx_ant;
771 u8 rate;
772 bool is_active = false;
773 int chan_mod;
774 u8 active_chains;
775 u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
776 int ret;
777
778 lockdep_assert_held(&priv->mutex);
779
780 if (vif)
781 ctx = iwl_rxon_ctx_from_vif(vif);
782
783 if (!priv->scan_cmd) {
784 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
785 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
786 if (!priv->scan_cmd) {
787 IWL_DEBUG_SCAN(priv,
788 "fail to allocate memory for scan\n");
789 return -ENOMEM;
790 }
791 }
792 scan = priv->scan_cmd;
793 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
794
795 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
796 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
797
798 if (priv->scan_type != IWL_SCAN_ROC &&
799 iwl_is_any_associated(priv)) {
800 u16 interval = 0;
801 u32 extra;
802 u32 suspend_time = 100;
803 u32 scan_suspend_time = 100;
804
805 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
806 switch (priv->scan_type) {
807 case IWL_SCAN_ROC:
808 WARN_ON(1);
809 break;
810 case IWL_SCAN_RADIO_RESET:
811 interval = 0;
812 break;
813 case IWL_SCAN_NORMAL:
814 interval = vif->bss_conf.beacon_int;
815 break;
816 }
817
818 scan->suspend_time = 0;
819 scan->max_out_time = cpu_to_le32(200 * 1024);
820 if (!interval)
821 interval = suspend_time;
822
823 extra = (suspend_time / interval) << 22;
824 scan_suspend_time = (extra |
825 ((suspend_time % interval) * 1024));
826 scan->suspend_time = cpu_to_le32(scan_suspend_time);
827 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
828 scan_suspend_time, interval);
829 } else if (priv->scan_type == IWL_SCAN_ROC) {
830 scan->suspend_time = 0;
831 scan->max_out_time = 0;
832 scan->quiet_time = 0;
833 scan->quiet_plcp_th = 0;
834 }
835
836 switch (priv->scan_type) {
837 case IWL_SCAN_RADIO_RESET:
838 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
839 break;
840 case IWL_SCAN_NORMAL:
841 if (priv->scan_request->n_ssids) {
842 int i, p = 0;
843 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
844 for (i = 0; i < priv->scan_request->n_ssids; i++) {
845 /* always does wildcard anyway */
846 if (!priv->scan_request->ssids[i].ssid_len)
847 continue;
848 scan->direct_scan[p].id = WLAN_EID_SSID;
849 scan->direct_scan[p].len =
850 priv->scan_request->ssids[i].ssid_len;
851 memcpy(scan->direct_scan[p].ssid,
852 priv->scan_request->ssids[i].ssid,
853 priv->scan_request->ssids[i].ssid_len);
854 n_probes++;
855 p++;
856 }
857 is_active = true;
858 } else
859 IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
860 break;
861 case IWL_SCAN_ROC:
862 IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
863 break;
864 }
865
866 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
867 scan->tx_cmd.sta_id = ctx->bcast_sta_id;
868 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
869
870 switch (priv->scan_band) {
871 case IEEE80211_BAND_2GHZ:
872 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
873 chan_mod = le32_to_cpu(
874 priv->contexts[IWL_RXON_CTX_BSS].active.flags &
875 RXON_FLG_CHANNEL_MODE_MSK)
876 >> RXON_FLG_CHANNEL_MODE_POS;
877 if (chan_mod == CHANNEL_MODE_PURE_40) {
878 rate = IWL_RATE_6M_PLCP;
879 } else {
880 rate = IWL_RATE_1M_PLCP;
881 rate_flags = RATE_MCS_CCK_MSK;
882 }
883 /*
884 * Internal scans are passive, so we can indiscriminately set
885 * the BT ignore flag on 2.4 GHz since it applies to TX only.
886 */
887 if (priv->cfg->bt_params &&
888 priv->cfg->bt_params->advanced_bt_coexist)
889 scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
890 break;
891 case IEEE80211_BAND_5GHZ:
892 rate = IWL_RATE_6M_PLCP;
893 break;
894 default:
895 IWL_WARN(priv, "Invalid scan band\n");
896 return -EIO;
897 }
898
899 /*
900 * If active scanning is requested but a certain channel is
901 * marked passive, we can do active scanning if we detect
902 * transmissions.
903 *
904 * There is an issue with some firmware versions that triggers
905 * a sysassert on a "good CRC threshold" of zero (== disabled),
906 * on a radar channel even though this means that we should NOT
907 * send probes.
908 *
909 * The "good CRC threshold" is the number of frames that we
910 * need to receive during our dwell time on a channel before
911 * sending out probes -- setting this to a huge value will
912 * mean we never reach it, but at the same time work around
913 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
914 * here instead of IWL_GOOD_CRC_TH_DISABLED.
915 *
916 * This was fixed in later versions along with some other
917 * scan changes, and the threshold behaves as a flag in those
918 * versions.
919 */
920 if (priv->new_scan_threshold_behaviour)
921 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
922 IWL_GOOD_CRC_TH_DISABLED;
923 else
924 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
925 IWL_GOOD_CRC_TH_NEVER;
926
927 band = priv->scan_band;
928
929 if (priv->cfg->scan_rx_antennas[band])
930 rx_ant = priv->cfg->scan_rx_antennas[band];
931
932 if (band == IEEE80211_BAND_2GHZ &&
933 priv->cfg->bt_params &&
934 priv->cfg->bt_params->advanced_bt_coexist) {
935 /* transmit 2.4 GHz probes only on first antenna */
936 scan_tx_antennas = first_antenna(scan_tx_antennas);
937 }
938
939 priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
940 scan_tx_antennas);
941 rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
942 scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
943
944 /* In power save mode use one chain, otherwise use all chains */
945 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
946 /* rx_ant has been set to all valid chains previously */
947 active_chains = rx_ant &
948 ((u8)(priv->chain_noise_data.active_chains));
949 if (!active_chains)
950 active_chains = rx_ant;
951
952 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
953 priv->chain_noise_data.active_chains);
954
955 rx_ant = first_antenna(active_chains);
956 }
957 if (priv->cfg->bt_params &&
958 priv->cfg->bt_params->advanced_bt_coexist &&
959 priv->bt_full_concurrent) {
960 /* operated as 1x1 in full concurrency mode */
961 rx_ant = first_antenna(rx_ant);
962 }
963
964 /* MIMO is not used here, but value is required */
965 rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
966 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
967 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
968 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
969 scan->rx_chain = cpu_to_le16(rx_chain);
970 switch (priv->scan_type) {
971 case IWL_SCAN_NORMAL:
972 cmd_len = iwl_fill_probe_req(priv,
973 (struct ieee80211_mgmt *)scan->data,
974 vif->addr,
975 priv->scan_request->ie,
976 priv->scan_request->ie_len,
977 IWL_MAX_SCAN_SIZE - sizeof(*scan));
978 break;
979 case IWL_SCAN_RADIO_RESET:
980 case IWL_SCAN_ROC:
981 /* use bcast addr, will not be transmitted but must be valid */
982 cmd_len = iwl_fill_probe_req(priv,
983 (struct ieee80211_mgmt *)scan->data,
984 iwl_bcast_addr, NULL, 0,
985 IWL_MAX_SCAN_SIZE - sizeof(*scan));
986 break;
987 default:
988 BUG();
989 }
990 scan->tx_cmd.len = cpu_to_le16(cmd_len);
991
992 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
993 RXON_FILTER_BCON_AWARE_MSK);
994
995 switch (priv->scan_type) {
996 case IWL_SCAN_RADIO_RESET:
997 scan->channel_count =
998 iwl_get_single_channel_for_scan(priv, vif, band,
999 (void *)&scan->data[cmd_len]);
1000 break;
1001 case IWL_SCAN_NORMAL:
1002 scan->channel_count =
1003 iwl_get_channels_for_scan(priv, vif, band,
1004 is_active, n_probes,
1005 (void *)&scan->data[cmd_len]);
1006 break;
1007 case IWL_SCAN_ROC: {
1008 struct iwl_scan_channel *scan_ch;
1009
1010 scan->channel_count = 1;
1011
1012 scan_ch = (void *)&scan->data[cmd_len];
1013 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1014 scan_ch->channel =
1015 cpu_to_le16(priv->hw_roc_channel->hw_value);
1016 scan_ch->active_dwell =
1017 scan_ch->passive_dwell =
1018 cpu_to_le16(priv->hw_roc_duration);
1019
1020 /* Set txpower levels to defaults */
1021 scan_ch->dsp_atten = 110;
1022
1023 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1024 * power level:
1025 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1026 */
1027 if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
1028 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1029 else
1030 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1031 }
1032 break;
1033 }
1034
1035 if (scan->channel_count == 0) {
1036 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1037 return -EIO;
1038 }
1039
1040 cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
1041 scan->channel_count * sizeof(struct iwl_scan_channel);
1042 cmd.data[0] = scan;
1043 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1044 scan->len = cpu_to_le16(cmd.len[0]);
1045
1046 /* set scan bit here for PAN params */
1047 set_bit(STATUS_SCAN_HW, &priv->status);
1048
1049 ret = iwlagn_set_pan_params(priv);
1050 if (ret)
1051 return ret;
1052
1053 ret = trans_send_cmd(&priv->trans, &cmd);
1054 if (ret) {
1055 clear_bit(STATUS_SCAN_HW, &priv->status);
1056 iwlagn_set_pan_params(priv);
1057 }
1058
1059 return ret;
1060 }
1061
1062 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
1063 struct ieee80211_vif *vif, bool add)
1064 {
1065 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1066
1067 if (add)
1068 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
1069 vif->bss_conf.bssid,
1070 &vif_priv->ibss_bssid_sta_id);
1071 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
1072 vif->bss_conf.bssid);
1073 }
1074
1075 void iwl_free_tfds_in_queue(struct iwl_priv *priv,
1076 int sta_id, int tid, int freed)
1077 {
1078 lockdep_assert_held(&priv->sta_lock);
1079
1080 if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1081 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1082 else {
1083 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
1084 priv->stations[sta_id].tid[tid].tfds_in_queue,
1085 freed);
1086 priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
1087 }
1088 }
1089
1090 #define IWL_FLUSH_WAIT_MS 2000
1091
1092 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
1093 {
1094 struct iwl_tx_queue *txq;
1095 struct iwl_queue *q;
1096 int cnt;
1097 unsigned long now = jiffies;
1098 int ret = 0;
1099
1100 /* waiting for all the tx frames complete might take a while */
1101 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1102 if (cnt == priv->cmd_queue)
1103 continue;
1104 txq = &priv->txq[cnt];
1105 q = &txq->q;
1106 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1107 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1108 msleep(1);
1109
1110 if (q->read_ptr != q->write_ptr) {
1111 IWL_ERR(priv, "fail to flush all tx fifo queues\n");
1112 ret = -ETIMEDOUT;
1113 break;
1114 }
1115 }
1116 return ret;
1117 }
1118
1119 #define IWL_TX_QUEUE_MSK 0xfffff
1120
1121 /**
1122 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
1123 *
1124 * pre-requirements:
1125 * 1. acquire mutex before calling
1126 * 2. make sure rf is on and not in exit state
1127 */
1128 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1129 {
1130 struct iwl_txfifo_flush_cmd flush_cmd;
1131 struct iwl_host_cmd cmd = {
1132 .id = REPLY_TXFIFO_FLUSH,
1133 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
1134 .flags = CMD_SYNC,
1135 .data = { &flush_cmd, },
1136 };
1137
1138 might_sleep();
1139
1140 memset(&flush_cmd, 0, sizeof(flush_cmd));
1141 if (flush_control & BIT(IWL_RXON_CTX_BSS))
1142 flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
1143 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
1144 IWL_SCD_MGMT_MSK;
1145 if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
1146 (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
1147 flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
1148 IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
1149 IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
1150 IWL_PAN_SCD_MULTICAST_MSK;
1151
1152 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
1153 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
1154
1155 IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
1156 flush_cmd.fifo_control);
1157 flush_cmd.flush_control = cpu_to_le16(flush_control);
1158
1159 return trans_send_cmd(&priv->trans, &cmd);
1160 }
1161
1162 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1163 {
1164 mutex_lock(&priv->mutex);
1165 ieee80211_stop_queues(priv->hw);
1166 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1167 IWL_ERR(priv, "flush request fail\n");
1168 goto done;
1169 }
1170 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
1171 iwlagn_wait_tx_queue_empty(priv);
1172 done:
1173 ieee80211_wake_queues(priv->hw);
1174 mutex_unlock(&priv->mutex);
1175 }
1176
1177 /*
1178 * BT coex
1179 */
1180 /*
1181 * Macros to access the lookup table.
1182 *
1183 * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
1184 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
1185 *
1186 * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
1187 *
1188 * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
1189 * one after another in 32-bit registers, and "registers" 0 through 7 contain
1190 * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
1191 *
1192 * These macros encode that format.
1193 */
1194 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
1195 wifi_txrx, wifi_sh_ant_req) \
1196 (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
1197 (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
1198
1199 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
1200 lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
1201 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1202 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1203 (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
1204 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1205 wifi_sh_ant_req))))
1206 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1207 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1208 LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
1209 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1210 wifi_sh_ant_req))
1211 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
1212 wifi_req, wifi_prio, wifi_txrx, \
1213 wifi_sh_ant_req) \
1214 LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
1215 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1216 wifi_sh_ant_req))
1217
1218 #define LUT_WLAN_KILL_OP(lut, op, val) \
1219 lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
1220 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1221 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1222 (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1223 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
1224 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1225 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1226 LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1227 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1228 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1229 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1230 LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1231 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1232
1233 #define LUT_ANT_SWITCH_OP(lut, op, val) \
1234 lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
1235 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1236 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1237 (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1238 wifi_req, wifi_prio, wifi_txrx, \
1239 wifi_sh_ant_req))))
1240 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1241 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1242 LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1243 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1244 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1245 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1246 LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1247 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1248
1249 static const __le32 iwlagn_def_3w_lookup[12] = {
1250 cpu_to_le32(0xaaaaaaaa),
1251 cpu_to_le32(0xaaaaaaaa),
1252 cpu_to_le32(0xaeaaaaaa),
1253 cpu_to_le32(0xaaaaaaaa),
1254 cpu_to_le32(0xcc00ff28),
1255 cpu_to_le32(0x0000aaaa),
1256 cpu_to_le32(0xcc00aaaa),
1257 cpu_to_le32(0x0000aaaa),
1258 cpu_to_le32(0xc0004000),
1259 cpu_to_le32(0x00004000),
1260 cpu_to_le32(0xf0005000),
1261 cpu_to_le32(0xf0005000),
1262 };
1263
1264 static const __le32 iwlagn_concurrent_lookup[12] = {
1265 cpu_to_le32(0xaaaaaaaa),
1266 cpu_to_le32(0xaaaaaaaa),
1267 cpu_to_le32(0xaaaaaaaa),
1268 cpu_to_le32(0xaaaaaaaa),
1269 cpu_to_le32(0xaaaaaaaa),
1270 cpu_to_le32(0xaaaaaaaa),
1271 cpu_to_le32(0xaaaaaaaa),
1272 cpu_to_le32(0xaaaaaaaa),
1273 cpu_to_le32(0x00000000),
1274 cpu_to_le32(0x00000000),
1275 cpu_to_le32(0x00000000),
1276 cpu_to_le32(0x00000000),
1277 };
1278
1279 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
1280 {
1281 struct iwl_basic_bt_cmd basic = {
1282 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
1283 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
1284 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
1285 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
1286 };
1287 struct iwl6000_bt_cmd bt_cmd_6000;
1288 struct iwl2000_bt_cmd bt_cmd_2000;
1289 int ret;
1290
1291 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
1292 sizeof(basic.bt3_lookup_table));
1293
1294 if (priv->cfg->bt_params) {
1295 if (priv->cfg->bt_params->bt_session_2) {
1296 bt_cmd_2000.prio_boost = cpu_to_le32(
1297 priv->cfg->bt_params->bt_prio_boost);
1298 bt_cmd_2000.tx_prio_boost = 0;
1299 bt_cmd_2000.rx_prio_boost = 0;
1300 } else {
1301 bt_cmd_6000.prio_boost =
1302 priv->cfg->bt_params->bt_prio_boost;
1303 bt_cmd_6000.tx_prio_boost = 0;
1304 bt_cmd_6000.rx_prio_boost = 0;
1305 }
1306 } else {
1307 IWL_ERR(priv, "failed to construct BT Coex Config\n");
1308 return;
1309 }
1310
1311 basic.kill_ack_mask = priv->kill_ack_mask;
1312 basic.kill_cts_mask = priv->kill_cts_mask;
1313 basic.valid = priv->bt_valid;
1314
1315 /*
1316 * Configure BT coex mode to "no coexistence" when the
1317 * user disabled BT coexistence, we have no interface
1318 * (might be in monitor mode), or the interface is in
1319 * IBSS mode (no proper uCode support for coex then).
1320 */
1321 if (!iwlagn_mod_params.bt_coex_active ||
1322 priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1323 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
1324 } else {
1325 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
1326 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
1327
1328 if (!priv->bt_enable_pspoll)
1329 basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1330 else
1331 basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1332
1333 if (priv->bt_ch_announce)
1334 basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
1335 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
1336 }
1337 priv->bt_enable_flag = basic.flags;
1338 if (priv->bt_full_concurrent)
1339 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
1340 sizeof(iwlagn_concurrent_lookup));
1341 else
1342 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
1343 sizeof(iwlagn_def_3w_lookup));
1344
1345 IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
1346 basic.flags ? "active" : "disabled",
1347 priv->bt_full_concurrent ?
1348 "full concurrency" : "3-wire");
1349
1350 if (priv->cfg->bt_params->bt_session_2) {
1351 memcpy(&bt_cmd_2000.basic, &basic,
1352 sizeof(basic));
1353 ret = trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1354 CMD_SYNC, sizeof(bt_cmd_2000), &bt_cmd_2000);
1355 } else {
1356 memcpy(&bt_cmd_6000.basic, &basic,
1357 sizeof(basic));
1358 ret = trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1359 CMD_SYNC, sizeof(bt_cmd_6000), &bt_cmd_6000);
1360 }
1361 if (ret)
1362 IWL_ERR(priv, "failed to send BT Coex Config\n");
1363
1364 }
1365
1366 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
1367 {
1368 struct iwl_rxon_context *ctx, *found_ctx = NULL;
1369 bool found_ap = false;
1370
1371 lockdep_assert_held(&priv->mutex);
1372
1373 /* Check whether AP or GO mode is active. */
1374 if (rssi_ena) {
1375 for_each_context(priv, ctx) {
1376 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
1377 iwl_is_associated_ctx(ctx)) {
1378 found_ap = true;
1379 break;
1380 }
1381 }
1382 }
1383
1384 /*
1385 * If disable was received or If GO/AP mode, disable RSSI
1386 * measurements.
1387 */
1388 if (!rssi_ena || found_ap) {
1389 if (priv->cur_rssi_ctx) {
1390 ctx = priv->cur_rssi_ctx;
1391 ieee80211_disable_rssi_reports(ctx->vif);
1392 priv->cur_rssi_ctx = NULL;
1393 }
1394 return;
1395 }
1396
1397 /*
1398 * If rssi measurements need to be enabled, consider all cases now.
1399 * Figure out how many contexts are active.
1400 */
1401 for_each_context(priv, ctx) {
1402 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
1403 iwl_is_associated_ctx(ctx)) {
1404 found_ctx = ctx;
1405 break;
1406 }
1407 }
1408
1409 /*
1410 * rssi monitor already enabled for the correct interface...nothing
1411 * to do.
1412 */
1413 if (found_ctx == priv->cur_rssi_ctx)
1414 return;
1415
1416 /*
1417 * Figure out if rssi monitor is currently enabled, and needs
1418 * to be changed. If rssi monitor is already enabled, disable
1419 * it first else just enable rssi measurements on the
1420 * interface found above.
1421 */
1422 if (priv->cur_rssi_ctx) {
1423 ctx = priv->cur_rssi_ctx;
1424 if (ctx->vif)
1425 ieee80211_disable_rssi_reports(ctx->vif);
1426 }
1427
1428 priv->cur_rssi_ctx = found_ctx;
1429
1430 if (!found_ctx)
1431 return;
1432
1433 ieee80211_enable_rssi_reports(found_ctx->vif,
1434 IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
1435 IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
1436 }
1437
1438 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
1439 {
1440 return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
1441 BT_UART_MSG_FRAME3SCOESCO_POS;
1442 }
1443
1444 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
1445 {
1446 struct iwl_priv *priv =
1447 container_of(work, struct iwl_priv, bt_traffic_change_work);
1448 struct iwl_rxon_context *ctx;
1449 int smps_request = -1;
1450
1451 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1452 /* bt coex disabled */
1453 return;
1454 }
1455
1456 /*
1457 * Note: bt_traffic_load can be overridden by scan complete and
1458 * coex profile notifications. Ignore that since only bad consequence
1459 * can be not matching debug print with actual state.
1460 */
1461 IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
1462 priv->bt_traffic_load);
1463
1464 switch (priv->bt_traffic_load) {
1465 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1466 if (priv->bt_status)
1467 smps_request = IEEE80211_SMPS_DYNAMIC;
1468 else
1469 smps_request = IEEE80211_SMPS_AUTOMATIC;
1470 break;
1471 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1472 smps_request = IEEE80211_SMPS_DYNAMIC;
1473 break;
1474 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1475 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1476 smps_request = IEEE80211_SMPS_STATIC;
1477 break;
1478 default:
1479 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1480 priv->bt_traffic_load);
1481 break;
1482 }
1483
1484 mutex_lock(&priv->mutex);
1485
1486 /*
1487 * We can not send command to firmware while scanning. When the scan
1488 * complete we will schedule this work again. We do check with mutex
1489 * locked to prevent new scan request to arrive. We do not check
1490 * STATUS_SCANNING to avoid race when queue_work two times from
1491 * different notifications, but quit and not perform any work at all.
1492 */
1493 if (test_bit(STATUS_SCAN_HW, &priv->status))
1494 goto out;
1495
1496 iwl_update_chain_flags(priv);
1497
1498 if (smps_request != -1) {
1499 priv->current_ht_config.smps = smps_request;
1500 for_each_context(priv, ctx) {
1501 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1502 ieee80211_request_smps(ctx->vif, smps_request);
1503 }
1504 }
1505
1506 /*
1507 * Dynamic PS poll related functionality. Adjust RSSI measurements if
1508 * necessary.
1509 */
1510 iwlagn_bt_coex_rssi_monitor(priv);
1511 out:
1512 mutex_unlock(&priv->mutex);
1513 }
1514
1515 /*
1516 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
1517 * correct interface or disable it if this is the last interface to be
1518 * removed.
1519 */
1520 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
1521 {
1522 if (priv->bt_is_sco &&
1523 priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
1524 iwlagn_bt_adjust_rssi_monitor(priv, true);
1525 else
1526 iwlagn_bt_adjust_rssi_monitor(priv, false);
1527 }
1528
1529 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1530 struct iwl_bt_uart_msg *uart_msg)
1531 {
1532 IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
1533 "Update Req = 0x%X",
1534 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1535 BT_UART_MSG_FRAME1MSGTYPE_POS,
1536 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1537 BT_UART_MSG_FRAME1SSN_POS,
1538 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1539 BT_UART_MSG_FRAME1UPDATEREQ_POS);
1540
1541 IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1542 "Chl_SeqN = 0x%X, In band = 0x%X",
1543 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1544 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1545 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1546 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1547 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1548 BT_UART_MSG_FRAME2CHLSEQN_POS,
1549 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1550 BT_UART_MSG_FRAME2INBAND_POS);
1551
1552 IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1553 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1554 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1555 BT_UART_MSG_FRAME3SCOESCO_POS,
1556 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1557 BT_UART_MSG_FRAME3SNIFF_POS,
1558 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1559 BT_UART_MSG_FRAME3A2DP_POS,
1560 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1561 BT_UART_MSG_FRAME3ACL_POS,
1562 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1563 BT_UART_MSG_FRAME3MASTER_POS,
1564 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1565 BT_UART_MSG_FRAME3OBEX_POS);
1566
1567 IWL_DEBUG_COEX(priv, "Idle duration = 0x%X",
1568 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1569 BT_UART_MSG_FRAME4IDLEDURATION_POS);
1570
1571 IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1572 "eSCO Retransmissions = 0x%X",
1573 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1574 BT_UART_MSG_FRAME5TXACTIVITY_POS,
1575 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1576 BT_UART_MSG_FRAME5RXACTIVITY_POS,
1577 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1578 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1579
1580 IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1581 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1582 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1583 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1584 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1585
1586 IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
1587 "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
1588 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1589 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1590 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
1591 BT_UART_MSG_FRAME7PAGE_POS,
1592 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
1593 BT_UART_MSG_FRAME7INQUIRY_POS,
1594 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1595 BT_UART_MSG_FRAME7CONNECTABLE_POS);
1596 }
1597
1598 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
1599 struct iwl_bt_uart_msg *uart_msg)
1600 {
1601 u8 kill_msk;
1602 static const __le32 bt_kill_ack_msg[2] = {
1603 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
1604 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1605 static const __le32 bt_kill_cts_msg[2] = {
1606 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
1607 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1608
1609 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
1610 ? 1 : 0;
1611 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
1612 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
1613 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
1614 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
1615 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
1616 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
1617
1618 /* schedule to send runtime bt_config */
1619 queue_work(priv->workqueue, &priv->bt_runtime_config);
1620 }
1621 }
1622
1623 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
1624 struct iwl_rx_mem_buffer *rxb)
1625 {
1626 unsigned long flags;
1627 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1628 struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
1629 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
1630
1631 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1632 /* bt coex disabled */
1633 return;
1634 }
1635
1636 IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
1637 IWL_DEBUG_COEX(priv, " status: %d\n", coex->bt_status);
1638 IWL_DEBUG_COEX(priv, " traffic load: %d\n", coex->bt_traffic_load);
1639 IWL_DEBUG_COEX(priv, " CI compliance: %d\n",
1640 coex->bt_ci_compliance);
1641 iwlagn_print_uartmsg(priv, uart_msg);
1642
1643 priv->last_bt_traffic_load = priv->bt_traffic_load;
1644 priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
1645
1646 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
1647 if (priv->bt_status != coex->bt_status ||
1648 priv->last_bt_traffic_load != coex->bt_traffic_load) {
1649 if (coex->bt_status) {
1650 /* BT on */
1651 if (!priv->bt_ch_announce)
1652 priv->bt_traffic_load =
1653 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1654 else
1655 priv->bt_traffic_load =
1656 coex->bt_traffic_load;
1657 } else {
1658 /* BT off */
1659 priv->bt_traffic_load =
1660 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
1661 }
1662 priv->bt_status = coex->bt_status;
1663 queue_work(priv->workqueue,
1664 &priv->bt_traffic_change_work);
1665 }
1666 }
1667
1668 iwlagn_set_kill_msk(priv, uart_msg);
1669
1670 /* FIXME: based on notification, adjust the prio_boost */
1671
1672 spin_lock_irqsave(&priv->lock, flags);
1673 priv->bt_ci_compliance = coex->bt_ci_compliance;
1674 spin_unlock_irqrestore(&priv->lock, flags);
1675 }
1676
1677 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
1678 {
1679 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
1680 iwlagn_bt_coex_profile_notif;
1681 }
1682
1683 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
1684 {
1685 INIT_WORK(&priv->bt_traffic_change_work,
1686 iwlagn_bt_traffic_change_work);
1687 }
1688
1689 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
1690 {
1691 cancel_work_sync(&priv->bt_traffic_change_work);
1692 }
1693
1694 static bool is_single_rx_stream(struct iwl_priv *priv)
1695 {
1696 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1697 priv->current_ht_config.single_chain_sufficient;
1698 }
1699
1700 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
1701 #define IWL_NUM_RX_CHAINS_SINGLE 2
1702 #define IWL_NUM_IDLE_CHAINS_DUAL 2
1703 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
1704
1705 /*
1706 * Determine how many receiver/antenna chains to use.
1707 *
1708 * More provides better reception via diversity. Fewer saves power
1709 * at the expense of throughput, but only when not in powersave to
1710 * start with.
1711 *
1712 * MIMO (dual stream) requires at least 2, but works better with 3.
1713 * This does not determine *which* chains to use, just how many.
1714 */
1715 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1716 {
1717 if (priv->cfg->bt_params &&
1718 priv->cfg->bt_params->advanced_bt_coexist &&
1719 (priv->bt_full_concurrent ||
1720 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1721 /*
1722 * only use chain 'A' in bt high traffic load or
1723 * full concurrency mode
1724 */
1725 return IWL_NUM_RX_CHAINS_SINGLE;
1726 }
1727 /* # of Rx chains to use when expecting MIMO. */
1728 if (is_single_rx_stream(priv))
1729 return IWL_NUM_RX_CHAINS_SINGLE;
1730 else
1731 return IWL_NUM_RX_CHAINS_MULTIPLE;
1732 }
1733
1734 /*
1735 * When we are in power saving mode, unless device support spatial
1736 * multiplexing power save, use the active count for rx chain count.
1737 */
1738 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1739 {
1740 /* # Rx chains when idling, depending on SMPS mode */
1741 switch (priv->current_ht_config.smps) {
1742 case IEEE80211_SMPS_STATIC:
1743 case IEEE80211_SMPS_DYNAMIC:
1744 return IWL_NUM_IDLE_CHAINS_SINGLE;
1745 case IEEE80211_SMPS_OFF:
1746 return active_cnt;
1747 default:
1748 WARN(1, "invalid SMPS mode %d",
1749 priv->current_ht_config.smps);
1750 return active_cnt;
1751 }
1752 }
1753
1754 /* up to 4 chains */
1755 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1756 {
1757 u8 res;
1758 res = (chain_bitmap & BIT(0)) >> 0;
1759 res += (chain_bitmap & BIT(1)) >> 1;
1760 res += (chain_bitmap & BIT(2)) >> 2;
1761 res += (chain_bitmap & BIT(3)) >> 3;
1762 return res;
1763 }
1764
1765 /**
1766 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1767 *
1768 * Selects how many and which Rx receivers/antennas/chains to use.
1769 * This should not be used for scan command ... it puts data in wrong place.
1770 */
1771 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1772 {
1773 bool is_single = is_single_rx_stream(priv);
1774 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1775 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1776 u32 active_chains;
1777 u16 rx_chain;
1778
1779 /* Tell uCode which antennas are actually connected.
1780 * Before first association, we assume all antennas are connected.
1781 * Just after first association, iwl_chain_noise_calibration()
1782 * checks which antennas actually *are* connected. */
1783 if (priv->chain_noise_data.active_chains)
1784 active_chains = priv->chain_noise_data.active_chains;
1785 else
1786 active_chains = priv->hw_params.valid_rx_ant;
1787
1788 if (priv->cfg->bt_params &&
1789 priv->cfg->bt_params->advanced_bt_coexist &&
1790 (priv->bt_full_concurrent ||
1791 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1792 /*
1793 * only use chain 'A' in bt high traffic load or
1794 * full concurrency mode
1795 */
1796 active_chains = first_antenna(active_chains);
1797 }
1798
1799 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1800
1801 /* How many receivers should we use? */
1802 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1803 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1804
1805
1806 /* correct rx chain count according hw settings
1807 * and chain noise calibration
1808 */
1809 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1810 if (valid_rx_cnt < active_rx_cnt)
1811 active_rx_cnt = valid_rx_cnt;
1812
1813 if (valid_rx_cnt < idle_rx_cnt)
1814 idle_rx_cnt = valid_rx_cnt;
1815
1816 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1817 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1818
1819 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
1820
1821 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1822 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1823 else
1824 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1825
1826 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1827 ctx->staging.rx_chain,
1828 active_rx_cnt, idle_rx_cnt);
1829
1830 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1831 active_rx_cnt < idle_rx_cnt);
1832 }
1833
1834 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
1835 {
1836 int i;
1837 u8 ind = ant;
1838
1839 if (priv->band == IEEE80211_BAND_2GHZ &&
1840 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
1841 return 0;
1842
1843 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
1844 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
1845 if (valid & BIT(ind))
1846 return ind;
1847 }
1848 return ant;
1849 }
1850
1851 static const char *get_csr_string(int cmd)
1852 {
1853 switch (cmd) {
1854 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1855 IWL_CMD(CSR_INT_COALESCING);
1856 IWL_CMD(CSR_INT);
1857 IWL_CMD(CSR_INT_MASK);
1858 IWL_CMD(CSR_FH_INT_STATUS);
1859 IWL_CMD(CSR_GPIO_IN);
1860 IWL_CMD(CSR_RESET);
1861 IWL_CMD(CSR_GP_CNTRL);
1862 IWL_CMD(CSR_HW_REV);
1863 IWL_CMD(CSR_EEPROM_REG);
1864 IWL_CMD(CSR_EEPROM_GP);
1865 IWL_CMD(CSR_OTP_GP_REG);
1866 IWL_CMD(CSR_GIO_REG);
1867 IWL_CMD(CSR_GP_UCODE_REG);
1868 IWL_CMD(CSR_GP_DRIVER_REG);
1869 IWL_CMD(CSR_UCODE_DRV_GP1);
1870 IWL_CMD(CSR_UCODE_DRV_GP2);
1871 IWL_CMD(CSR_LED_REG);
1872 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1873 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1874 IWL_CMD(CSR_ANA_PLL_CFG);
1875 IWL_CMD(CSR_HW_REV_WA_REG);
1876 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1877 default:
1878 return "UNKNOWN";
1879 }
1880 }
1881
1882 void iwl_dump_csr(struct iwl_priv *priv)
1883 {
1884 int i;
1885 static const u32 csr_tbl[] = {
1886 CSR_HW_IF_CONFIG_REG,
1887 CSR_INT_COALESCING,
1888 CSR_INT,
1889 CSR_INT_MASK,
1890 CSR_FH_INT_STATUS,
1891 CSR_GPIO_IN,
1892 CSR_RESET,
1893 CSR_GP_CNTRL,
1894 CSR_HW_REV,
1895 CSR_EEPROM_REG,
1896 CSR_EEPROM_GP,
1897 CSR_OTP_GP_REG,
1898 CSR_GIO_REG,
1899 CSR_GP_UCODE_REG,
1900 CSR_GP_DRIVER_REG,
1901 CSR_UCODE_DRV_GP1,
1902 CSR_UCODE_DRV_GP2,
1903 CSR_LED_REG,
1904 CSR_DRAM_INT_TBL_REG,
1905 CSR_GIO_CHICKEN_BITS,
1906 CSR_ANA_PLL_CFG,
1907 CSR_HW_REV_WA_REG,
1908 CSR_DBG_HPET_MEM_REG
1909 };
1910 IWL_ERR(priv, "CSR values:\n");
1911 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
1912 "CSR_INT_PERIODIC_REG)\n");
1913 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
1914 IWL_ERR(priv, " %25s: 0X%08x\n",
1915 get_csr_string(csr_tbl[i]),
1916 iwl_read32(priv, csr_tbl[i]));
1917 }
1918 }
1919
1920 static const char *get_fh_string(int cmd)
1921 {
1922 switch (cmd) {
1923 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1924 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1925 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1926 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1927 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1928 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1929 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1930 IWL_CMD(FH_TSSR_TX_STATUS_REG);
1931 IWL_CMD(FH_TSSR_TX_ERROR_REG);
1932 default:
1933 return "UNKNOWN";
1934 }
1935 }
1936
1937 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
1938 {
1939 int i;
1940 #ifdef CONFIG_IWLWIFI_DEBUG
1941 int pos = 0;
1942 size_t bufsz = 0;
1943 #endif
1944 static const u32 fh_tbl[] = {
1945 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1946 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1947 FH_RSCSR_CHNL0_WPTR,
1948 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1949 FH_MEM_RSSR_SHARED_CTRL_REG,
1950 FH_MEM_RSSR_RX_STATUS_REG,
1951 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1952 FH_TSSR_TX_STATUS_REG,
1953 FH_TSSR_TX_ERROR_REG
1954 };
1955 #ifdef CONFIG_IWLWIFI_DEBUG
1956 if (display) {
1957 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1958 *buf = kmalloc(bufsz, GFP_KERNEL);
1959 if (!*buf)
1960 return -ENOMEM;
1961 pos += scnprintf(*buf + pos, bufsz - pos,
1962 "FH register values:\n");
1963 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1964 pos += scnprintf(*buf + pos, bufsz - pos,
1965 " %34s: 0X%08x\n",
1966 get_fh_string(fh_tbl[i]),
1967 iwl_read_direct32(priv, fh_tbl[i]));
1968 }
1969 return pos;
1970 }
1971 #endif
1972 IWL_ERR(priv, "FH register values:\n");
1973 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1974 IWL_ERR(priv, " %34s: 0X%08x\n",
1975 get_fh_string(fh_tbl[i]),
1976 iwl_read_direct32(priv, fh_tbl[i]));
1977 }
1978 return 0;
1979 }
1980
1981 /* notification wait support */
1982 void iwlagn_init_notification_wait(struct iwl_priv *priv,
1983 struct iwl_notification_wait *wait_entry,
1984 u8 cmd,
1985 void (*fn)(struct iwl_priv *priv,
1986 struct iwl_rx_packet *pkt,
1987 void *data),
1988 void *fn_data)
1989 {
1990 wait_entry->fn = fn;
1991 wait_entry->fn_data = fn_data;
1992 wait_entry->cmd = cmd;
1993 wait_entry->triggered = false;
1994 wait_entry->aborted = false;
1995
1996 spin_lock_bh(&priv->notif_wait_lock);
1997 list_add(&wait_entry->list, &priv->notif_waits);
1998 spin_unlock_bh(&priv->notif_wait_lock);
1999 }
2000
2001 int iwlagn_wait_notification(struct iwl_priv *priv,
2002 struct iwl_notification_wait *wait_entry,
2003 unsigned long timeout)
2004 {
2005 int ret;
2006
2007 ret = wait_event_timeout(priv->notif_waitq,
2008 wait_entry->triggered || wait_entry->aborted,
2009 timeout);
2010
2011 spin_lock_bh(&priv->notif_wait_lock);
2012 list_del(&wait_entry->list);
2013 spin_unlock_bh(&priv->notif_wait_lock);
2014
2015 if (wait_entry->aborted)
2016 return -EIO;
2017
2018 /* return value is always >= 0 */
2019 if (ret <= 0)
2020 return -ETIMEDOUT;
2021 return 0;
2022 }
2023
2024 void iwlagn_remove_notification(struct iwl_priv *priv,
2025 struct iwl_notification_wait *wait_entry)
2026 {
2027 spin_lock_bh(&priv->notif_wait_lock);
2028 list_del(&wait_entry->list);
2029 spin_unlock_bh(&priv->notif_wait_lock);
2030 }
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