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Revert "gma500: Fix dependencies"
[zen-stable.git] / drivers / net / wireless / iwlwifi / iwl-agn-lib.c
blobf803fb62f8bc0abee7a41d3d09ec3bdd35895cbe
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
43 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
44 {
45 return le32_to_cpup((__le32 *)&tx_resp->status +
46 tx_resp->frame_count) & MAX_SN;
47 }
48
49 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
50 {
51 status &= TX_STATUS_MSK;
52
53 switch (status) {
54 case TX_STATUS_POSTPONE_DELAY:
55 priv->_agn.reply_tx_stats.pp_delay++;
56 break;
57 case TX_STATUS_POSTPONE_FEW_BYTES:
58 priv->_agn.reply_tx_stats.pp_few_bytes++;
59 break;
60 case TX_STATUS_POSTPONE_BT_PRIO:
61 priv->_agn.reply_tx_stats.pp_bt_prio++;
62 break;
63 case TX_STATUS_POSTPONE_QUIET_PERIOD:
64 priv->_agn.reply_tx_stats.pp_quiet_period++;
65 break;
66 case TX_STATUS_POSTPONE_CALC_TTAK:
67 priv->_agn.reply_tx_stats.pp_calc_ttak++;
68 break;
69 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
70 priv->_agn.reply_tx_stats.int_crossed_retry++;
71 break;
72 case TX_STATUS_FAIL_SHORT_LIMIT:
73 priv->_agn.reply_tx_stats.short_limit++;
74 break;
75 case TX_STATUS_FAIL_LONG_LIMIT:
76 priv->_agn.reply_tx_stats.long_limit++;
77 break;
78 case TX_STATUS_FAIL_FIFO_UNDERRUN:
79 priv->_agn.reply_tx_stats.fifo_underrun++;
80 break;
81 case TX_STATUS_FAIL_DRAIN_FLOW:
82 priv->_agn.reply_tx_stats.drain_flow++;
83 break;
84 case TX_STATUS_FAIL_RFKILL_FLUSH:
85 priv->_agn.reply_tx_stats.rfkill_flush++;
86 break;
87 case TX_STATUS_FAIL_LIFE_EXPIRE:
88 priv->_agn.reply_tx_stats.life_expire++;
89 break;
90 case TX_STATUS_FAIL_DEST_PS:
91 priv->_agn.reply_tx_stats.dest_ps++;
92 break;
93 case TX_STATUS_FAIL_HOST_ABORTED:
94 priv->_agn.reply_tx_stats.host_abort++;
95 break;
96 case TX_STATUS_FAIL_BT_RETRY:
97 priv->_agn.reply_tx_stats.bt_retry++;
98 break;
99 case TX_STATUS_FAIL_STA_INVALID:
100 priv->_agn.reply_tx_stats.sta_invalid++;
101 break;
102 case TX_STATUS_FAIL_FRAG_DROPPED:
103 priv->_agn.reply_tx_stats.frag_drop++;
104 break;
105 case TX_STATUS_FAIL_TID_DISABLE:
106 priv->_agn.reply_tx_stats.tid_disable++;
107 break;
108 case TX_STATUS_FAIL_FIFO_FLUSHED:
109 priv->_agn.reply_tx_stats.fifo_flush++;
110 break;
111 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
112 priv->_agn.reply_tx_stats.insuff_cf_poll++;
113 break;
114 case TX_STATUS_FAIL_PASSIVE_NO_RX:
115 priv->_agn.reply_tx_stats.fail_hw_drop++;
116 break;
117 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
118 priv->_agn.reply_tx_stats.sta_color_mismatch++;
119 break;
120 default:
121 priv->_agn.reply_tx_stats.unknown++;
122 break;
123 }
124 }
125
126 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
127 {
128 status &= AGG_TX_STATUS_MSK;
129
130 switch (status) {
131 case AGG_TX_STATE_UNDERRUN_MSK:
132 priv->_agn.reply_agg_tx_stats.underrun++;
133 break;
134 case AGG_TX_STATE_BT_PRIO_MSK:
135 priv->_agn.reply_agg_tx_stats.bt_prio++;
136 break;
137 case AGG_TX_STATE_FEW_BYTES_MSK:
138 priv->_agn.reply_agg_tx_stats.few_bytes++;
139 break;
140 case AGG_TX_STATE_ABORT_MSK:
141 priv->_agn.reply_agg_tx_stats.abort++;
142 break;
143 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
144 priv->_agn.reply_agg_tx_stats.last_sent_ttl++;
145 break;
146 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
147 priv->_agn.reply_agg_tx_stats.last_sent_try++;
148 break;
149 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
150 priv->_agn.reply_agg_tx_stats.last_sent_bt_kill++;
151 break;
152 case AGG_TX_STATE_SCD_QUERY_MSK:
153 priv->_agn.reply_agg_tx_stats.scd_query++;
154 break;
155 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
156 priv->_agn.reply_agg_tx_stats.bad_crc32++;
157 break;
158 case AGG_TX_STATE_RESPONSE_MSK:
159 priv->_agn.reply_agg_tx_stats.response++;
160 break;
161 case AGG_TX_STATE_DUMP_TX_MSK:
162 priv->_agn.reply_agg_tx_stats.dump_tx++;
163 break;
164 case AGG_TX_STATE_DELAY_TX_MSK:
165 priv->_agn.reply_agg_tx_stats.delay_tx++;
166 break;
167 default:
168 priv->_agn.reply_agg_tx_stats.unknown++;
169 break;
170 }
171 }
172
173 static void iwlagn_set_tx_status(struct iwl_priv *priv,
174 struct ieee80211_tx_info *info,
175 struct iwl_rxon_context *ctx,
176 struct iwlagn_tx_resp *tx_resp,
177 int txq_id, bool is_agg)
178 {
179 u16 status = le16_to_cpu(tx_resp->status.status);
180
181 info->status.rates[0].count = tx_resp->failure_frame + 1;
182 if (is_agg)
183 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
184 info->flags |= iwl_tx_status_to_mac80211(status);
185 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
186 info);
187 if (!iwl_is_tx_success(status))
188 iwlagn_count_tx_err_status(priv, status);
189
190 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
191 iwl_is_associated_ctx(ctx) && ctx->vif &&
192 ctx->vif->type == NL80211_IFTYPE_STATION) {
193 ctx->last_tx_rejected = true;
194 iwl_stop_queue(priv, &priv->txq[txq_id]);
195 }
196
197 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
198 "0x%x retries %d\n",
199 txq_id,
200 iwl_get_tx_fail_reason(status), status,
201 le32_to_cpu(tx_resp->rate_n_flags),
202 tx_resp->failure_frame);
203 }
204
205 #ifdef CONFIG_IWLWIFI_DEBUG
206 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
207
208 const char *iwl_get_agg_tx_fail_reason(u16 status)
209 {
210 status &= AGG_TX_STATUS_MSK;
211 switch (status) {
212 case AGG_TX_STATE_TRANSMITTED:
213 return "SUCCESS";
214 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
215 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
216 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
217 AGG_TX_STATE_FAIL(ABORT_MSK);
218 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
219 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
220 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
221 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
222 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
223 AGG_TX_STATE_FAIL(RESPONSE_MSK);
224 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
225 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
226 }
227
228 return "UNKNOWN";
229 }
230 #endif /* CONFIG_IWLWIFI_DEBUG */
231
232 static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
233 struct iwl_ht_agg *agg,
234 struct iwlagn_tx_resp *tx_resp,
235 int txq_id, u16 start_idx)
236 {
237 u16 status;
238 struct agg_tx_status *frame_status = &tx_resp->status;
239 struct ieee80211_hdr *hdr = NULL;
240 int i, sh, idx;
241 u16 seq;
242
243 if (agg->wait_for_ba)
244 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
245
246 agg->frame_count = tx_resp->frame_count;
247 agg->start_idx = start_idx;
248 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
249 agg->bitmap = 0;
250
251 /* # frames attempted by Tx command */
252 if (agg->frame_count == 1) {
253 struct iwl_tx_info *txb;
254
255 /* Only one frame was attempted; no block-ack will arrive */
256 idx = start_idx;
257
258 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
259 agg->frame_count, agg->start_idx, idx);
260 txb = &priv->txq[txq_id].txb[idx];
261 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb),
262 txb->ctx, tx_resp, txq_id, true);
263 agg->wait_for_ba = 0;
264 } else {
265 /* Two or more frames were attempted; expect block-ack */
266 u64 bitmap = 0;
267
268 /*
269 * Start is the lowest frame sent. It may not be the first
270 * frame in the batch; we figure this out dynamically during
271 * the following loop.
272 */
273 int start = agg->start_idx;
274
275 /* Construct bit-map of pending frames within Tx window */
276 for (i = 0; i < agg->frame_count; i++) {
277 u16 sc;
278 status = le16_to_cpu(frame_status[i].status);
279 seq = le16_to_cpu(frame_status[i].sequence);
280 idx = SEQ_TO_INDEX(seq);
281 txq_id = SEQ_TO_QUEUE(seq);
282
283 if (status & AGG_TX_STATUS_MSK)
284 iwlagn_count_agg_tx_err_status(priv, status);
285
286 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
287 AGG_TX_STATE_ABORT_MSK))
288 continue;
289
290 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
291 agg->frame_count, txq_id, idx);
292 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
293 "try-count (0x%08x)\n",
294 iwl_get_agg_tx_fail_reason(status),
295 status & AGG_TX_STATUS_MSK,
296 status & AGG_TX_TRY_MSK);
297
298 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
299 if (!hdr) {
300 IWL_ERR(priv,
301 "BUG_ON idx doesn't point to valid skb"
302 " idx=%d, txq_id=%d\n", idx, txq_id);
303 return -1;
304 }
305
306 sc = le16_to_cpu(hdr->seq_ctrl);
307 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
308 IWL_ERR(priv,
309 "BUG_ON idx doesn't match seq control"
310 " idx=%d, seq_idx=%d, seq=%d\n",
311 idx, SEQ_TO_SN(sc),
312 hdr->seq_ctrl);
313 return -1;
314 }
315
316 IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
317 i, idx, SEQ_TO_SN(sc));
318
319 /*
320 * sh -> how many frames ahead of the starting frame is
321 * the current one?
322 *
323 * Note that all frames sent in the batch must be in a
324 * 64-frame window, so this number should be in [0,63].
325 * If outside of this window, then we've found a new
326 * "first" frame in the batch and need to change start.
327 */
328 sh = idx - start;
329
330 /*
331 * If >= 64, out of window. start must be at the front
332 * of the circular buffer, idx must be near the end of
333 * the buffer, and idx is the new "first" frame. Shift
334 * the indices around.
335 */
336 if (sh >= 64) {
337 /* Shift bitmap by start - idx, wrapped */
338 sh = 0x100 - idx + start;
339 bitmap = bitmap << sh;
340 /* Now idx is the new start so sh = 0 */
341 sh = 0;
342 start = idx;
343 /*
344 * If <= -64 then wraps the 256-pkt circular buffer
345 * (e.g., start = 255 and idx = 0, sh should be 1)
346 */
347 } else if (sh <= -64) {
348 sh = 0x100 - start + idx;
349 /*
350 * If < 0 but > -64, out of window. idx is before start
351 * but not wrapped. Shift the indices around.
352 */
353 } else if (sh < 0) {
354 /* Shift by how far start is ahead of idx */
355 sh = start - idx;
356 bitmap = bitmap << sh;
357 /* Now idx is the new start so sh = 0 */
358 start = idx;
359 sh = 0;
360 }
361 /* Sequence number start + sh was sent in this batch */
362 bitmap |= 1ULL << sh;
363 IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
364 start, (unsigned long long)bitmap);
365 }
366
367 /*
368 * Store the bitmap and possibly the new start, if we wrapped
369 * the buffer above
370 */
371 agg->bitmap = bitmap;
372 agg->start_idx = start;
373 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
374 agg->frame_count, agg->start_idx,
375 (unsigned long long)agg->bitmap);
376
377 if (bitmap)
378 agg->wait_for_ba = 1;
379 }
380 return 0;
381 }
382
383 void iwl_check_abort_status(struct iwl_priv *priv,
384 u8 frame_count, u32 status)
385 {
386 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
387 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
388 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
389 queue_work(priv->workqueue, &priv->tx_flush);
390 }
391 }
392
393 static void iwlagn_rx_reply_tx(struct iwl_priv *priv,
394 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 iwl_tx_info *txb;
404 u32 status = le16_to_cpu(tx_resp->status.status);
405 int tid;
406 int sta_id;
407 int freed;
408 unsigned long flags;
409
410 if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
411 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
412 "is out of range [0-%d] %d %d\n", txq_id,
413 index, txq->q.n_bd, txq->q.write_ptr,
414 txq->q.read_ptr);
415 return;
416 }
417
418 txq->time_stamp = jiffies;
419 txb = &txq->txb[txq->q.read_ptr];
420 info = IEEE80211_SKB_CB(txb->skb);
421 memset(&info->status, 0, sizeof(info->status));
422
423 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
424 IWLAGN_TX_RES_TID_POS;
425 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
426 IWLAGN_TX_RES_RA_POS;
427
428 spin_lock_irqsave(&priv->sta_lock, flags);
429 if (txq->sched_retry) {
430 const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
431 struct iwl_ht_agg *agg;
432
433 agg = &priv->stations[sta_id].tid[tid].agg;
434 /*
435 * If the BT kill count is non-zero, we'll get this
436 * notification again.
437 */
438 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
439 priv->cfg->bt_params &&
440 priv->cfg->bt_params->advanced_bt_coexist) {
441 IWL_WARN(priv, "receive reply tx with bt_kill\n");
442 }
443 iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
444
445 /* check if BAR is needed */
446 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
447 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
448
449 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
450 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
451 IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
452 "scd_ssn=%d idx=%d txq=%d swq=%d\n",
453 scd_ssn , index, txq_id, txq->swq_id);
454
455 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
456 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
457
458 if (priv->mac80211_registered &&
459 (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
460 (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
461 iwl_wake_queue(priv, txq);
462 }
463 } else {
464 iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp,
465 txq_id, false);
466 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
467 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
468
469 if (priv->mac80211_registered &&
470 iwl_queue_space(&txq->q) > txq->q.low_mark &&
471 status != TX_STATUS_FAIL_PASSIVE_NO_RX)
472 iwl_wake_queue(priv, txq);
473 }
474
475 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
476
477 iwl_check_abort_status(priv, tx_resp->frame_count, status);
478 spin_unlock_irqrestore(&priv->sta_lock, flags);
479 }
480
481 void iwlagn_rx_handler_setup(struct iwl_priv *priv)
482 {
483 /* init calibration handlers */
484 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
485 iwlagn_rx_calib_result;
486 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
487
488 /* set up notification wait support */
489 spin_lock_init(&priv->_agn.notif_wait_lock);
490 INIT_LIST_HEAD(&priv->_agn.notif_waits);
491 init_waitqueue_head(&priv->_agn.notif_waitq);
492 }
493
494 void iwlagn_setup_deferred_work(struct iwl_priv *priv)
495 {
496 /*
497 * nothing need to be done here anymore
498 * still keep for future use if needed
499 */
500 }
501
502 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
503 {
504 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
505 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
506 }
507
508 int iwlagn_send_tx_power(struct iwl_priv *priv)
509 {
510 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
511 u8 tx_ant_cfg_cmd;
512
513 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
514 "TX Power requested while scanning!\n"))
515 return -EAGAIN;
516
517 /* half dBm need to multiply */
518 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
519
520 if (priv->tx_power_lmt_in_half_dbm &&
521 priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
522 /*
523 * For the newer devices which using enhanced/extend tx power
524 * table in EEPROM, the format is in half dBm. driver need to
525 * convert to dBm format before report to mac80211.
526 * By doing so, there is a possibility of 1/2 dBm resolution
527 * lost. driver will perform "round-up" operation before
528 * reporting, but it will cause 1/2 dBm tx power over the
529 * regulatory limit. Perform the checking here, if the
530 * "tx_power_user_lmt" is higher than EEPROM value (in
531 * half-dBm format), lower the tx power based on EEPROM
532 */
533 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
534 }
535 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
536 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
537
538 if (IWL_UCODE_API(priv->ucode_ver) == 1)
539 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
540 else
541 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
542
543 return iwl_send_cmd_pdu(priv, tx_ant_cfg_cmd, sizeof(tx_power_cmd),
544 &tx_power_cmd);
545 }
546
547 void iwlagn_temperature(struct iwl_priv *priv)
548 {
549 /* store temperature from correct statistics (in Celsius) */
550 priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
551 iwl_tt_handler(priv);
552 }
553
554 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
555 {
556 struct iwl_eeprom_calib_hdr {
557 u8 version;
558 u8 pa_type;
559 u16 voltage;
560 } *hdr;
561
562 hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
563 EEPROM_CALIB_ALL);
564 return hdr->version;
565
566 }
567
568 /*
569 * EEPROM
570 */
571 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
572 {
573 u16 offset = 0;
574
575 if ((address & INDIRECT_ADDRESS) == 0)
576 return address;
577
578 switch (address & INDIRECT_TYPE_MSK) {
579 case INDIRECT_HOST:
580 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
581 break;
582 case INDIRECT_GENERAL:
583 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
584 break;
585 case INDIRECT_REGULATORY:
586 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
587 break;
588 case INDIRECT_TXP_LIMIT:
589 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
590 break;
591 case INDIRECT_TXP_LIMIT_SIZE:
592 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
593 break;
594 case INDIRECT_CALIBRATION:
595 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
596 break;
597 case INDIRECT_PROCESS_ADJST:
598 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
599 break;
600 case INDIRECT_OTHERS:
601 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
602 break;
603 default:
604 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
605 address & INDIRECT_TYPE_MSK);
606 break;
607 }
608
609 /* translate the offset from words to byte */
610 return (address & ADDRESS_MSK) + (offset << 1);
611 }
612
613 const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv,
614 size_t offset)
615 {
616 u32 address = eeprom_indirect_address(priv, offset);
617 BUG_ON(address >= priv->cfg->base_params->eeprom_size);
618 return &priv->eeprom[address];
619 }
620
621 struct iwl_mod_params iwlagn_mod_params = {
622 .amsdu_size_8K = 1,
623 .restart_fw = 1,
624 .plcp_check = true,
625 /* the rest are 0 by default */
626 };
627
628 void iwlagn_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
629 {
630 unsigned long flags;
631 int i;
632 spin_lock_irqsave(&rxq->lock, flags);
633 INIT_LIST_HEAD(&rxq->rx_free);
634 INIT_LIST_HEAD(&rxq->rx_used);
635 /* Fill the rx_used queue with _all_ of the Rx buffers */
636 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
637 /* In the reset function, these buffers may have been allocated
638 * to an SKB, so we need to unmap and free potential storage */
639 if (rxq->pool[i].page != NULL) {
640 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
641 PAGE_SIZE << priv->hw_params.rx_page_order,
642 PCI_DMA_FROMDEVICE);
643 __iwl_free_pages(priv, rxq->pool[i].page);
644 rxq->pool[i].page = NULL;
645 }
646 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
647 }
648
649 for (i = 0; i < RX_QUEUE_SIZE; i++)
650 rxq->queue[i] = NULL;
651
652 /* Set us so that we have processed and used all buffers, but have
653 * not restocked the Rx queue with fresh buffers */
654 rxq->read = rxq->write = 0;
655 rxq->write_actual = 0;
656 rxq->free_count = 0;
657 spin_unlock_irqrestore(&rxq->lock, flags);
658 }
659
660 int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
661 {
662 u32 rb_size;
663 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
664 u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */
665
666 rb_timeout = RX_RB_TIMEOUT;
667
668 if (iwlagn_mod_params.amsdu_size_8K)
669 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
670 else
671 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
672
673 /* Stop Rx DMA */
674 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
675
676 /* Reset driver's Rx queue write index */
677 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
678
679 /* Tell device where to find RBD circular buffer in DRAM */
680 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
681 (u32)(rxq->bd_dma >> 8));
682
683 /* Tell device where in DRAM to update its Rx status */
684 iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
685 rxq->rb_stts_dma >> 4);
686
687 /* Enable Rx DMA
688 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
689 * the credit mechanism in 5000 HW RX FIFO
690 * Direct rx interrupts to hosts
691 * Rx buffer size 4 or 8k
692 * RB timeout 0x10
693 * 256 RBDs
694 */
695 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
696 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
697 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
698 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
699 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
700 rb_size|
701 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
702 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
703
704 /* Set interrupt coalescing timer to default (2048 usecs) */
705 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
706
707 return 0;
708 }
709
710 static void iwlagn_set_pwr_vmain(struct iwl_priv *priv)
711 {
712 /*
713 * (for documentation purposes)
714 * to set power to V_AUX, do:
715
716 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
717 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
718 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
719 ~APMG_PS_CTRL_MSK_PWR_SRC);
720 */
721
722 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
723 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
724 ~APMG_PS_CTRL_MSK_PWR_SRC);
725 }
726
727 int iwlagn_hw_nic_init(struct iwl_priv *priv)
728 {
729 unsigned long flags;
730 struct iwl_rx_queue *rxq = &priv->rxq;
731 int ret;
732
733 /* nic_init */
734 spin_lock_irqsave(&priv->lock, flags);
735 priv->cfg->ops->lib->apm_ops.init(priv);
736
737 /* Set interrupt coalescing calibration timer to default (512 usecs) */
738 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
739
740 spin_unlock_irqrestore(&priv->lock, flags);
741
742 iwlagn_set_pwr_vmain(priv);
743
744 priv->cfg->ops->lib->apm_ops.config(priv);
745
746 /* Allocate the RX queue, or reset if it is already allocated */
747 if (!rxq->bd) {
748 ret = iwl_rx_queue_alloc(priv);
749 if (ret) {
750 IWL_ERR(priv, "Unable to initialize Rx queue\n");
751 return -ENOMEM;
752 }
753 } else
754 iwlagn_rx_queue_reset(priv, rxq);
755
756 iwlagn_rx_replenish(priv);
757
758 iwlagn_rx_init(priv, rxq);
759
760 spin_lock_irqsave(&priv->lock, flags);
761
762 rxq->need_update = 1;
763 iwl_rx_queue_update_write_ptr(priv, rxq);
764
765 spin_unlock_irqrestore(&priv->lock, flags);
766
767 /* Allocate or reset and init all Tx and Command queues */
768 if (!priv->txq) {
769 ret = iwlagn_txq_ctx_alloc(priv);
770 if (ret)
771 return ret;
772 } else
773 iwlagn_txq_ctx_reset(priv);
774
775 if (priv->cfg->base_params->shadow_reg_enable) {
776 /* enable shadow regs in HW */
777 iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL,
778 0x800FFFFF);
779 }
780
781 set_bit(STATUS_INIT, &priv->status);
782
783 return 0;
784 }
785
786 /**
787 * iwlagn_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
788 */
789 static inline __le32 iwlagn_dma_addr2rbd_ptr(struct iwl_priv *priv,
790 dma_addr_t dma_addr)
791 {
792 return cpu_to_le32((u32)(dma_addr >> 8));
793 }
794
795 /**
796 * iwlagn_rx_queue_restock - refill RX queue from pre-allocated pool
797 *
798 * If there are slots in the RX queue that need to be restocked,
799 * and we have free pre-allocated buffers, fill the ranks as much
800 * as we can, pulling from rx_free.
801 *
802 * This moves the 'write' index forward to catch up with 'processed', and
803 * also updates the memory address in the firmware to reference the new
804 * target buffer.
805 */
806 void iwlagn_rx_queue_restock(struct iwl_priv *priv)
807 {
808 struct iwl_rx_queue *rxq = &priv->rxq;
809 struct list_head *element;
810 struct iwl_rx_mem_buffer *rxb;
811 unsigned long flags;
812
813 spin_lock_irqsave(&rxq->lock, flags);
814 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
815 /* The overwritten rxb must be a used one */
816 rxb = rxq->queue[rxq->write];
817 BUG_ON(rxb && rxb->page);
818
819 /* Get next free Rx buffer, remove from free list */
820 element = rxq->rx_free.next;
821 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
822 list_del(element);
823
824 /* Point to Rx buffer via next RBD in circular buffer */
825 rxq->bd[rxq->write] = iwlagn_dma_addr2rbd_ptr(priv,
826 rxb->page_dma);
827 rxq->queue[rxq->write] = rxb;
828 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
829 rxq->free_count--;
830 }
831 spin_unlock_irqrestore(&rxq->lock, flags);
832 /* If the pre-allocated buffer pool is dropping low, schedule to
833 * refill it */
834 if (rxq->free_count <= RX_LOW_WATERMARK)
835 queue_work(priv->workqueue, &priv->rx_replenish);
836
837
838 /* If we've added more space for the firmware to place data, tell it.
839 * Increment device's write pointer in multiples of 8. */
840 if (rxq->write_actual != (rxq->write & ~0x7)) {
841 spin_lock_irqsave(&rxq->lock, flags);
842 rxq->need_update = 1;
843 spin_unlock_irqrestore(&rxq->lock, flags);
844 iwl_rx_queue_update_write_ptr(priv, rxq);
845 }
846 }
847
848 /**
849 * iwlagn_rx_replenish - Move all used packet from rx_used to rx_free
850 *
851 * When moving to rx_free an SKB is allocated for the slot.
852 *
853 * Also restock the Rx queue via iwl_rx_queue_restock.
854 * This is called as a scheduled work item (except for during initialization)
855 */
856 void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority)
857 {
858 struct iwl_rx_queue *rxq = &priv->rxq;
859 struct list_head *element;
860 struct iwl_rx_mem_buffer *rxb;
861 struct page *page;
862 unsigned long flags;
863 gfp_t gfp_mask = priority;
864
865 while (1) {
866 spin_lock_irqsave(&rxq->lock, flags);
867 if (list_empty(&rxq->rx_used)) {
868 spin_unlock_irqrestore(&rxq->lock, flags);
869 return;
870 }
871 spin_unlock_irqrestore(&rxq->lock, flags);
872
873 if (rxq->free_count > RX_LOW_WATERMARK)
874 gfp_mask |= __GFP_NOWARN;
875
876 if (priv->hw_params.rx_page_order > 0)
877 gfp_mask |= __GFP_COMP;
878
879 /* Alloc a new receive buffer */
880 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
881 if (!page) {
882 if (net_ratelimit())
883 IWL_DEBUG_INFO(priv, "alloc_pages failed, "
884 "order: %d\n",
885 priv->hw_params.rx_page_order);
886
887 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
888 net_ratelimit())
889 IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n",
890 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
891 rxq->free_count);
892 /* We don't reschedule replenish work here -- we will
893 * call the restock method and if it still needs
894 * more buffers it will schedule replenish */
895 return;
896 }
897
898 spin_lock_irqsave(&rxq->lock, flags);
899
900 if (list_empty(&rxq->rx_used)) {
901 spin_unlock_irqrestore(&rxq->lock, flags);
902 __free_pages(page, priv->hw_params.rx_page_order);
903 return;
904 }
905 element = rxq->rx_used.next;
906 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
907 list_del(element);
908
909 spin_unlock_irqrestore(&rxq->lock, flags);
910
911 BUG_ON(rxb->page);
912 rxb->page = page;
913 /* Get physical address of the RB */
914 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
915 PAGE_SIZE << priv->hw_params.rx_page_order,
916 PCI_DMA_FROMDEVICE);
917 /* dma address must be no more than 36 bits */
918 BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
919 /* and also 256 byte aligned! */
920 BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
921
922 spin_lock_irqsave(&rxq->lock, flags);
923
924 list_add_tail(&rxb->list, &rxq->rx_free);
925 rxq->free_count++;
926
927 spin_unlock_irqrestore(&rxq->lock, flags);
928 }
929 }
930
931 void iwlagn_rx_replenish(struct iwl_priv *priv)
932 {
933 unsigned long flags;
934
935 iwlagn_rx_allocate(priv, GFP_KERNEL);
936
937 spin_lock_irqsave(&priv->lock, flags);
938 iwlagn_rx_queue_restock(priv);
939 spin_unlock_irqrestore(&priv->lock, flags);
940 }
941
942 void iwlagn_rx_replenish_now(struct iwl_priv *priv)
943 {
944 iwlagn_rx_allocate(priv, GFP_ATOMIC);
945
946 iwlagn_rx_queue_restock(priv);
947 }
948
949 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
950 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
951 * This free routine walks the list of POOL entries and if SKB is set to
952 * non NULL it is unmapped and freed
953 */
954 void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
955 {
956 int i;
957 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
958 if (rxq->pool[i].page != NULL) {
959 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
960 PAGE_SIZE << priv->hw_params.rx_page_order,
961 PCI_DMA_FROMDEVICE);
962 __iwl_free_pages(priv, rxq->pool[i].page);
963 rxq->pool[i].page = NULL;
964 }
965 }
966
967 dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
968 rxq->bd_dma);
969 dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
970 rxq->rb_stts, rxq->rb_stts_dma);
971 rxq->bd = NULL;
972 rxq->rb_stts = NULL;
973 }
974
975 int iwlagn_rxq_stop(struct iwl_priv *priv)
976 {
977
978 /* stop Rx DMA */
979 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
980 iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
981 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
982
983 return 0;
984 }
985
986 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
987 {
988 int idx = 0;
989 int band_offset = 0;
990
991 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
992 if (rate_n_flags & RATE_MCS_HT_MSK) {
993 idx = (rate_n_flags & 0xff);
994 return idx;
995 /* Legacy rate format, search for match in table */
996 } else {
997 if (band == IEEE80211_BAND_5GHZ)
998 band_offset = IWL_FIRST_OFDM_RATE;
999 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
1000 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
1001 return idx - band_offset;
1002 }
1003
1004 return -1;
1005 }
1006
1007 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
1008 struct ieee80211_vif *vif,
1009 enum ieee80211_band band,
1010 struct iwl_scan_channel *scan_ch)
1011 {
1012 const struct ieee80211_supported_band *sband;
1013 u16 passive_dwell = 0;
1014 u16 active_dwell = 0;
1015 int added = 0;
1016 u16 channel = 0;
1017
1018 sband = iwl_get_hw_mode(priv, band);
1019 if (!sband) {
1020 IWL_ERR(priv, "invalid band\n");
1021 return added;
1022 }
1023
1024 active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1025 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1026
1027 if (passive_dwell <= active_dwell)
1028 passive_dwell = active_dwell + 1;
1029
1030 channel = iwl_get_single_channel_number(priv, band);
1031 if (channel) {
1032 scan_ch->channel = cpu_to_le16(channel);
1033 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1034 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1035 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1036 /* Set txpower levels to defaults */
1037 scan_ch->dsp_atten = 110;
1038 if (band == IEEE80211_BAND_5GHZ)
1039 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1040 else
1041 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1042 added++;
1043 } else
1044 IWL_ERR(priv, "no valid channel found\n");
1045 return added;
1046 }
1047
1048 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
1049 struct ieee80211_vif *vif,
1050 enum ieee80211_band band,
1051 u8 is_active, u8 n_probes,
1052 struct iwl_scan_channel *scan_ch)
1053 {
1054 struct ieee80211_channel *chan;
1055 const struct ieee80211_supported_band *sband;
1056 const struct iwl_channel_info *ch_info;
1057 u16 passive_dwell = 0;
1058 u16 active_dwell = 0;
1059 int added, i;
1060 u16 channel;
1061
1062 sband = iwl_get_hw_mode(priv, band);
1063 if (!sband)
1064 return 0;
1065
1066 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1067 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1068
1069 if (passive_dwell <= active_dwell)
1070 passive_dwell = active_dwell + 1;
1071
1072 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1073 chan = priv->scan_request->channels[i];
1074
1075 if (chan->band != band)
1076 continue;
1077
1078 channel = chan->hw_value;
1079 scan_ch->channel = cpu_to_le16(channel);
1080
1081 ch_info = iwl_get_channel_info(priv, band, channel);
1082 if (!is_channel_valid(ch_info)) {
1083 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1084 channel);
1085 continue;
1086 }
1087
1088 if (!is_active || is_channel_passive(ch_info) ||
1089 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
1090 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1091 else
1092 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
1093
1094 if (n_probes)
1095 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
1096
1097 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1098 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1099
1100 /* Set txpower levels to defaults */
1101 scan_ch->dsp_atten = 110;
1102
1103 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1104 * power level:
1105 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1106 */
1107 if (band == IEEE80211_BAND_5GHZ)
1108 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1109 else
1110 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1111
1112 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
1113 channel, le32_to_cpu(scan_ch->type),
1114 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
1115 "ACTIVE" : "PASSIVE",
1116 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
1117 active_dwell : passive_dwell);
1118
1119 scan_ch++;
1120 added++;
1121 }
1122
1123 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1124 return added;
1125 }
1126
1127 static int iwl_fill_offch_tx(struct iwl_priv *priv, void *data, size_t maxlen)
1128 {
1129 struct sk_buff *skb = priv->_agn.offchan_tx_skb;
1130
1131 if (skb->len < maxlen)
1132 maxlen = skb->len;
1133
1134 memcpy(data, skb->data, maxlen);
1135
1136 return maxlen;
1137 }
1138
1139 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
1140 {
1141 struct iwl_host_cmd cmd = {
1142 .id = REPLY_SCAN_CMD,
1143 .len = { sizeof(struct iwl_scan_cmd), },
1144 };
1145 struct iwl_scan_cmd *scan;
1146 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1147 u32 rate_flags = 0;
1148 u16 cmd_len;
1149 u16 rx_chain = 0;
1150 enum ieee80211_band band;
1151 u8 n_probes = 0;
1152 u8 rx_ant = priv->hw_params.valid_rx_ant;
1153 u8 rate;
1154 bool is_active = false;
1155 int chan_mod;
1156 u8 active_chains;
1157 u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
1158 int ret;
1159
1160 lockdep_assert_held(&priv->mutex);
1161
1162 if (vif)
1163 ctx = iwl_rxon_ctx_from_vif(vif);
1164
1165 if (!priv->scan_cmd) {
1166 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
1167 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
1168 if (!priv->scan_cmd) {
1169 IWL_DEBUG_SCAN(priv,
1170 "fail to allocate memory for scan\n");
1171 return -ENOMEM;
1172 }
1173 }
1174 scan = priv->scan_cmd;
1175 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
1176
1177 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
1178 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
1179
1180 if (priv->scan_type != IWL_SCAN_OFFCH_TX &&
1181 iwl_is_any_associated(priv)) {
1182 u16 interval = 0;
1183 u32 extra;
1184 u32 suspend_time = 100;
1185 u32 scan_suspend_time = 100;
1186
1187 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
1188 switch (priv->scan_type) {
1189 case IWL_SCAN_OFFCH_TX:
1190 WARN_ON(1);
1191 break;
1192 case IWL_SCAN_RADIO_RESET:
1193 interval = 0;
1194 break;
1195 case IWL_SCAN_NORMAL:
1196 interval = vif->bss_conf.beacon_int;
1197 break;
1198 }
1199
1200 scan->suspend_time = 0;
1201 scan->max_out_time = cpu_to_le32(200 * 1024);
1202 if (!interval)
1203 interval = suspend_time;
1204
1205 extra = (suspend_time / interval) << 22;
1206 scan_suspend_time = (extra |
1207 ((suspend_time % interval) * 1024));
1208 scan->suspend_time = cpu_to_le32(scan_suspend_time);
1209 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
1210 scan_suspend_time, interval);
1211 } else if (priv->scan_type == IWL_SCAN_OFFCH_TX) {
1212 scan->suspend_time = 0;
1213 scan->max_out_time =
1214 cpu_to_le32(1024 * priv->_agn.offchan_tx_timeout);
1215 }
1216
1217 switch (priv->scan_type) {
1218 case IWL_SCAN_RADIO_RESET:
1219 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
1220 break;
1221 case IWL_SCAN_NORMAL:
1222 if (priv->scan_request->n_ssids) {
1223 int i, p = 0;
1224 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
1225 for (i = 0; i < priv->scan_request->n_ssids; i++) {
1226 /* always does wildcard anyway */
1227 if (!priv->scan_request->ssids[i].ssid_len)
1228 continue;
1229 scan->direct_scan[p].id = WLAN_EID_SSID;
1230 scan->direct_scan[p].len =
1231 priv->scan_request->ssids[i].ssid_len;
1232 memcpy(scan->direct_scan[p].ssid,
1233 priv->scan_request->ssids[i].ssid,
1234 priv->scan_request->ssids[i].ssid_len);
1235 n_probes++;
1236 p++;
1237 }
1238 is_active = true;
1239 } else
1240 IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
1241 break;
1242 case IWL_SCAN_OFFCH_TX:
1243 IWL_DEBUG_SCAN(priv, "Start offchannel TX scan.\n");
1244 break;
1245 }
1246
1247 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
1248 scan->tx_cmd.sta_id = ctx->bcast_sta_id;
1249 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1250
1251 switch (priv->scan_band) {
1252 case IEEE80211_BAND_2GHZ:
1253 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
1254 chan_mod = le32_to_cpu(
1255 priv->contexts[IWL_RXON_CTX_BSS].active.flags &
1256 RXON_FLG_CHANNEL_MODE_MSK)
1257 >> RXON_FLG_CHANNEL_MODE_POS;
1258 if (chan_mod == CHANNEL_MODE_PURE_40) {
1259 rate = IWL_RATE_6M_PLCP;
1260 } else {
1261 rate = IWL_RATE_1M_PLCP;
1262 rate_flags = RATE_MCS_CCK_MSK;
1263 }
1264 /*
1265 * Internal scans are passive, so we can indiscriminately set
1266 * the BT ignore flag on 2.4 GHz since it applies to TX only.
1267 */
1268 if (priv->cfg->bt_params &&
1269 priv->cfg->bt_params->advanced_bt_coexist)
1270 scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
1271 break;
1272 case IEEE80211_BAND_5GHZ:
1273 rate = IWL_RATE_6M_PLCP;
1274 break;
1275 default:
1276 IWL_WARN(priv, "Invalid scan band\n");
1277 return -EIO;
1278 }
1279
1280 /*
1281 * If active scanning is requested but a certain channel is
1282 * marked passive, we can do active scanning if we detect
1283 * transmissions.
1284 *
1285 * There is an issue with some firmware versions that triggers
1286 * a sysassert on a "good CRC threshold" of zero (== disabled),
1287 * on a radar channel even though this means that we should NOT
1288 * send probes.
1289 *
1290 * The "good CRC threshold" is the number of frames that we
1291 * need to receive during our dwell time on a channel before
1292 * sending out probes -- setting this to a huge value will
1293 * mean we never reach it, but at the same time work around
1294 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
1295 * here instead of IWL_GOOD_CRC_TH_DISABLED.
1296 *
1297 * This was fixed in later versions along with some other
1298 * scan changes, and the threshold behaves as a flag in those
1299 * versions.
1300 */
1301 if (priv->new_scan_threshold_behaviour)
1302 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
1303 IWL_GOOD_CRC_TH_DISABLED;
1304 else
1305 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
1306 IWL_GOOD_CRC_TH_NEVER;
1307
1308 band = priv->scan_band;
1309
1310 if (priv->cfg->scan_rx_antennas[band])
1311 rx_ant = priv->cfg->scan_rx_antennas[band];
1312
1313 if (band == IEEE80211_BAND_2GHZ &&
1314 priv->cfg->bt_params &&
1315 priv->cfg->bt_params->advanced_bt_coexist) {
1316 /* transmit 2.4 GHz probes only on first antenna */
1317 scan_tx_antennas = first_antenna(scan_tx_antennas);
1318 }
1319
1320 priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
1321 scan_tx_antennas);
1322 rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
1323 scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
1324
1325 /* In power save mode use one chain, otherwise use all chains */
1326 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
1327 /* rx_ant has been set to all valid chains previously */
1328 active_chains = rx_ant &
1329 ((u8)(priv->chain_noise_data.active_chains));
1330 if (!active_chains)
1331 active_chains = rx_ant;
1332
1333 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
1334 priv->chain_noise_data.active_chains);
1335
1336 rx_ant = first_antenna(active_chains);
1337 }
1338 if (priv->cfg->bt_params &&
1339 priv->cfg->bt_params->advanced_bt_coexist &&
1340 priv->bt_full_concurrent) {
1341 /* operated as 1x1 in full concurrency mode */
1342 rx_ant = first_antenna(rx_ant);
1343 }
1344
1345 /* MIMO is not used here, but value is required */
1346 rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1347 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1348 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1349 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1350 scan->rx_chain = cpu_to_le16(rx_chain);
1351 switch (priv->scan_type) {
1352 case IWL_SCAN_NORMAL:
1353 cmd_len = iwl_fill_probe_req(priv,
1354 (struct ieee80211_mgmt *)scan->data,
1355 vif->addr,
1356 priv->scan_request->ie,
1357 priv->scan_request->ie_len,
1358 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1359 break;
1360 case IWL_SCAN_RADIO_RESET:
1361 /* use bcast addr, will not be transmitted but must be valid */
1362 cmd_len = iwl_fill_probe_req(priv,
1363 (struct ieee80211_mgmt *)scan->data,
1364 iwl_bcast_addr, NULL, 0,
1365 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1366 break;
1367 case IWL_SCAN_OFFCH_TX:
1368 cmd_len = iwl_fill_offch_tx(priv, scan->data,
1369 IWL_MAX_SCAN_SIZE
1370 - sizeof(*scan)
1371 - sizeof(struct iwl_scan_channel));
1372 scan->scan_flags |= IWL_SCAN_FLAGS_ACTION_FRAME_TX;
1373 break;
1374 default:
1375 BUG();
1376 }
1377 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1378
1379 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
1380 RXON_FILTER_BCON_AWARE_MSK);
1381
1382 switch (priv->scan_type) {
1383 case IWL_SCAN_RADIO_RESET:
1384 scan->channel_count =
1385 iwl_get_single_channel_for_scan(priv, vif, band,
1386 (void *)&scan->data[cmd_len]);
1387 break;
1388 case IWL_SCAN_NORMAL:
1389 scan->channel_count =
1390 iwl_get_channels_for_scan(priv, vif, band,
1391 is_active, n_probes,
1392 (void *)&scan->data[cmd_len]);
1393 break;
1394 case IWL_SCAN_OFFCH_TX: {
1395 struct iwl_scan_channel *scan_ch;
1396
1397 scan->channel_count = 1;
1398
1399 scan_ch = (void *)&scan->data[cmd_len];
1400 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
1401 scan_ch->channel =
1402 cpu_to_le16(priv->_agn.offchan_tx_chan->hw_value);
1403 scan_ch->active_dwell =
1404 cpu_to_le16(priv->_agn.offchan_tx_timeout);
1405 scan_ch->passive_dwell = 0;
1406
1407 /* Set txpower levels to defaults */
1408 scan_ch->dsp_atten = 110;
1409
1410 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1411 * power level:
1412 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1413 */
1414 if (priv->_agn.offchan_tx_chan->band == IEEE80211_BAND_5GHZ)
1415 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1416 else
1417 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1418 }
1419 break;
1420 }
1421
1422 if (scan->channel_count == 0) {
1423 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1424 return -EIO;
1425 }
1426
1427 cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
1428 scan->channel_count * sizeof(struct iwl_scan_channel);
1429 cmd.data[0] = scan;
1430 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1431 scan->len = cpu_to_le16(cmd.len[0]);
1432
1433 /* set scan bit here for PAN params */
1434 set_bit(STATUS_SCAN_HW, &priv->status);
1435
1436 if (priv->cfg->ops->hcmd->set_pan_params) {
1437 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
1438 if (ret)
1439 return ret;
1440 }
1441
1442 ret = iwl_send_cmd_sync(priv, &cmd);
1443 if (ret) {
1444 clear_bit(STATUS_SCAN_HW, &priv->status);
1445 if (priv->cfg->ops->hcmd->set_pan_params)
1446 priv->cfg->ops->hcmd->set_pan_params(priv);
1447 }
1448
1449 return ret;
1450 }
1451
1452 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
1453 struct ieee80211_vif *vif, bool add)
1454 {
1455 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1456
1457 if (add)
1458 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
1459 vif->bss_conf.bssid,
1460 &vif_priv->ibss_bssid_sta_id);
1461 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
1462 vif->bss_conf.bssid);
1463 }
1464
1465 void iwl_free_tfds_in_queue(struct iwl_priv *priv,
1466 int sta_id, int tid, int freed)
1467 {
1468 lockdep_assert_held(&priv->sta_lock);
1469
1470 if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1471 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1472 else {
1473 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
1474 priv->stations[sta_id].tid[tid].tfds_in_queue,
1475 freed);
1476 priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
1477 }
1478 }
1479
1480 #define IWL_FLUSH_WAIT_MS 2000
1481
1482 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
1483 {
1484 struct iwl_tx_queue *txq;
1485 struct iwl_queue *q;
1486 int cnt;
1487 unsigned long now = jiffies;
1488 int ret = 0;
1489
1490 /* waiting for all the tx frames complete might take a while */
1491 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1492 if (cnt == priv->cmd_queue)
1493 continue;
1494 txq = &priv->txq[cnt];
1495 q = &txq->q;
1496 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1497 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1498 msleep(1);
1499
1500 if (q->read_ptr != q->write_ptr) {
1501 IWL_ERR(priv, "fail to flush all tx fifo queues\n");
1502 ret = -ETIMEDOUT;
1503 break;
1504 }
1505 }
1506 return ret;
1507 }
1508
1509 #define IWL_TX_QUEUE_MSK 0xfffff
1510
1511 /**
1512 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
1513 *
1514 * pre-requirements:
1515 * 1. acquire mutex before calling
1516 * 2. make sure rf is on and not in exit state
1517 */
1518 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1519 {
1520 struct iwl_txfifo_flush_cmd flush_cmd;
1521 struct iwl_host_cmd cmd = {
1522 .id = REPLY_TXFIFO_FLUSH,
1523 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
1524 .flags = CMD_SYNC,
1525 .data = { &flush_cmd, },
1526 };
1527
1528 might_sleep();
1529
1530 memset(&flush_cmd, 0, sizeof(flush_cmd));
1531 flush_cmd.fifo_control = IWL_TX_FIFO_VO_MSK | IWL_TX_FIFO_VI_MSK |
1532 IWL_TX_FIFO_BE_MSK | IWL_TX_FIFO_BK_MSK;
1533 if (priv->cfg->sku & IWL_SKU_N)
1534 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
1535
1536 IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
1537 flush_cmd.fifo_control);
1538 flush_cmd.flush_control = cpu_to_le16(flush_control);
1539
1540 return iwl_send_cmd(priv, &cmd);
1541 }
1542
1543 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1544 {
1545 mutex_lock(&priv->mutex);
1546 ieee80211_stop_queues(priv->hw);
1547 if (priv->cfg->ops->lib->txfifo_flush(priv, IWL_DROP_ALL)) {
1548 IWL_ERR(priv, "flush request fail\n");
1549 goto done;
1550 }
1551 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
1552 iwlagn_wait_tx_queue_empty(priv);
1553 done:
1554 ieee80211_wake_queues(priv->hw);
1555 mutex_unlock(&priv->mutex);
1556 }
1557
1558 /*
1559 * BT coex
1560 */
1561 /*
1562 * Macros to access the lookup table.
1563 *
1564 * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
1565 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
1566 *
1567 * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
1568 *
1569 * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
1570 * one after another in 32-bit registers, and "registers" 0 through 7 contain
1571 * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
1572 *
1573 * These macros encode that format.
1574 */
1575 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
1576 wifi_txrx, wifi_sh_ant_req) \
1577 (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
1578 (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
1579
1580 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
1581 lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
1582 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1583 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1584 (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
1585 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1586 wifi_sh_ant_req))))
1587 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1588 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1589 LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
1590 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1591 wifi_sh_ant_req))
1592 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
1593 wifi_req, wifi_prio, wifi_txrx, \
1594 wifi_sh_ant_req) \
1595 LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
1596 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1597 wifi_sh_ant_req))
1598
1599 #define LUT_WLAN_KILL_OP(lut, op, val) \
1600 lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
1601 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1602 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1603 (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1604 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
1605 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1606 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1607 LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1608 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1609 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1610 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1611 LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1612 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1613
1614 #define LUT_ANT_SWITCH_OP(lut, op, val) \
1615 lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
1616 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1617 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1618 (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1619 wifi_req, wifi_prio, wifi_txrx, \
1620 wifi_sh_ant_req))))
1621 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1622 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1623 LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1624 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1625 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1626 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1627 LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1628 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1629
1630 static const __le32 iwlagn_def_3w_lookup[12] = {
1631 cpu_to_le32(0xaaaaaaaa),
1632 cpu_to_le32(0xaaaaaaaa),
1633 cpu_to_le32(0xaeaaaaaa),
1634 cpu_to_le32(0xaaaaaaaa),
1635 cpu_to_le32(0xcc00ff28),
1636 cpu_to_le32(0x0000aaaa),
1637 cpu_to_le32(0xcc00aaaa),
1638 cpu_to_le32(0x0000aaaa),
1639 cpu_to_le32(0xc0004000),
1640 cpu_to_le32(0x00004000),
1641 cpu_to_le32(0xf0005000),
1642 cpu_to_le32(0xf0005000),
1643 };
1644
1645 static const __le32 iwlagn_concurrent_lookup[12] = {
1646 cpu_to_le32(0xaaaaaaaa),
1647 cpu_to_le32(0xaaaaaaaa),
1648 cpu_to_le32(0xaaaaaaaa),
1649 cpu_to_le32(0xaaaaaaaa),
1650 cpu_to_le32(0xaaaaaaaa),
1651 cpu_to_le32(0xaaaaaaaa),
1652 cpu_to_le32(0xaaaaaaaa),
1653 cpu_to_le32(0xaaaaaaaa),
1654 cpu_to_le32(0x00000000),
1655 cpu_to_le32(0x00000000),
1656 cpu_to_le32(0x00000000),
1657 cpu_to_le32(0x00000000),
1658 };
1659
1660 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
1661 {
1662 struct iwl_basic_bt_cmd basic = {
1663 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
1664 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
1665 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
1666 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
1667 };
1668 struct iwl6000_bt_cmd bt_cmd_6000;
1669 struct iwl2000_bt_cmd bt_cmd_2000;
1670 int ret;
1671
1672 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
1673 sizeof(basic.bt3_lookup_table));
1674
1675 if (priv->cfg->bt_params) {
1676 if (priv->cfg->bt_params->bt_session_2) {
1677 bt_cmd_2000.prio_boost = cpu_to_le32(
1678 priv->cfg->bt_params->bt_prio_boost);
1679 bt_cmd_2000.tx_prio_boost = 0;
1680 bt_cmd_2000.rx_prio_boost = 0;
1681 } else {
1682 bt_cmd_6000.prio_boost =
1683 priv->cfg->bt_params->bt_prio_boost;
1684 bt_cmd_6000.tx_prio_boost = 0;
1685 bt_cmd_6000.rx_prio_boost = 0;
1686 }
1687 } else {
1688 IWL_ERR(priv, "failed to construct BT Coex Config\n");
1689 return;
1690 }
1691
1692 basic.kill_ack_mask = priv->kill_ack_mask;
1693 basic.kill_cts_mask = priv->kill_cts_mask;
1694 basic.valid = priv->bt_valid;
1695
1696 /*
1697 * Configure BT coex mode to "no coexistence" when the
1698 * user disabled BT coexistence, we have no interface
1699 * (might be in monitor mode), or the interface is in
1700 * IBSS mode (no proper uCode support for coex then).
1701 */
1702 if (!bt_coex_active || priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1703 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
1704 } else {
1705 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
1706 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
1707 if (priv->cfg->bt_params &&
1708 priv->cfg->bt_params->bt_sco_disable)
1709 basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1710
1711 if (priv->bt_ch_announce)
1712 basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
1713 IWL_DEBUG_INFO(priv, "BT coex flag: 0X%x\n", basic.flags);
1714 }
1715 priv->bt_enable_flag = basic.flags;
1716 if (priv->bt_full_concurrent)
1717 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
1718 sizeof(iwlagn_concurrent_lookup));
1719 else
1720 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
1721 sizeof(iwlagn_def_3w_lookup));
1722
1723 IWL_DEBUG_INFO(priv, "BT coex %s in %s mode\n",
1724 basic.flags ? "active" : "disabled",
1725 priv->bt_full_concurrent ?
1726 "full concurrency" : "3-wire");
1727
1728 if (priv->cfg->bt_params->bt_session_2) {
1729 memcpy(&bt_cmd_2000.basic, &basic,
1730 sizeof(basic));
1731 ret = iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1732 sizeof(bt_cmd_2000), &bt_cmd_2000);
1733 } else {
1734 memcpy(&bt_cmd_6000.basic, &basic,
1735 sizeof(basic));
1736 ret = iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1737 sizeof(bt_cmd_6000), &bt_cmd_6000);
1738 }
1739 if (ret)
1740 IWL_ERR(priv, "failed to send BT Coex Config\n");
1741
1742 }
1743
1744 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
1745 {
1746 struct iwl_priv *priv =
1747 container_of(work, struct iwl_priv, bt_traffic_change_work);
1748 struct iwl_rxon_context *ctx;
1749 int smps_request = -1;
1750
1751 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1752 /* bt coex disabled */
1753 return;
1754 }
1755
1756 /*
1757 * Note: bt_traffic_load can be overridden by scan complete and
1758 * coex profile notifications. Ignore that since only bad consequence
1759 * can be not matching debug print with actual state.
1760 */
1761 IWL_DEBUG_INFO(priv, "BT traffic load changes: %d\n",
1762 priv->bt_traffic_load);
1763
1764 switch (priv->bt_traffic_load) {
1765 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1766 if (priv->bt_status)
1767 smps_request = IEEE80211_SMPS_DYNAMIC;
1768 else
1769 smps_request = IEEE80211_SMPS_AUTOMATIC;
1770 break;
1771 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1772 smps_request = IEEE80211_SMPS_DYNAMIC;
1773 break;
1774 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1775 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1776 smps_request = IEEE80211_SMPS_STATIC;
1777 break;
1778 default:
1779 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1780 priv->bt_traffic_load);
1781 break;
1782 }
1783
1784 mutex_lock(&priv->mutex);
1785
1786 /*
1787 * We can not send command to firmware while scanning. When the scan
1788 * complete we will schedule this work again. We do check with mutex
1789 * locked to prevent new scan request to arrive. We do not check
1790 * STATUS_SCANNING to avoid race when queue_work two times from
1791 * different notifications, but quit and not perform any work at all.
1792 */
1793 if (test_bit(STATUS_SCAN_HW, &priv->status))
1794 goto out;
1795
1796 if (priv->cfg->ops->lib->update_chain_flags)
1797 priv->cfg->ops->lib->update_chain_flags(priv);
1798
1799 if (smps_request != -1) {
1800 for_each_context(priv, ctx) {
1801 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1802 ieee80211_request_smps(ctx->vif, smps_request);
1803 }
1804 }
1805 out:
1806 mutex_unlock(&priv->mutex);
1807 }
1808
1809 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1810 struct iwl_bt_uart_msg *uart_msg)
1811 {
1812 IWL_DEBUG_NOTIF(priv, "Message Type = 0x%X, SSN = 0x%X, "
1813 "Update Req = 0x%X",
1814 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1815 BT_UART_MSG_FRAME1MSGTYPE_POS,
1816 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1817 BT_UART_MSG_FRAME1SSN_POS,
1818 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1819 BT_UART_MSG_FRAME1UPDATEREQ_POS);
1820
1821 IWL_DEBUG_NOTIF(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1822 "Chl_SeqN = 0x%X, In band = 0x%X",
1823 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1824 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1825 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1826 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1827 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1828 BT_UART_MSG_FRAME2CHLSEQN_POS,
1829 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1830 BT_UART_MSG_FRAME2INBAND_POS);
1831
1832 IWL_DEBUG_NOTIF(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1833 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1834 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1835 BT_UART_MSG_FRAME3SCOESCO_POS,
1836 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1837 BT_UART_MSG_FRAME3SNIFF_POS,
1838 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1839 BT_UART_MSG_FRAME3A2DP_POS,
1840 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1841 BT_UART_MSG_FRAME3ACL_POS,
1842 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1843 BT_UART_MSG_FRAME3MASTER_POS,
1844 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1845 BT_UART_MSG_FRAME3OBEX_POS);
1846
1847 IWL_DEBUG_NOTIF(priv, "Idle duration = 0x%X",
1848 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1849 BT_UART_MSG_FRAME4IDLEDURATION_POS);
1850
1851 IWL_DEBUG_NOTIF(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1852 "eSCO Retransmissions = 0x%X",
1853 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1854 BT_UART_MSG_FRAME5TXACTIVITY_POS,
1855 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1856 BT_UART_MSG_FRAME5RXACTIVITY_POS,
1857 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1858 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1859
1860 IWL_DEBUG_NOTIF(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1861 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1862 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1863 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1864 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1865
1866 IWL_DEBUG_NOTIF(priv, "Sniff Activity = 0x%X, Page = "
1867 "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
1868 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1869 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1870 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
1871 BT_UART_MSG_FRAME7PAGE_POS,
1872 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
1873 BT_UART_MSG_FRAME7INQUIRY_POS,
1874 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1875 BT_UART_MSG_FRAME7CONNECTABLE_POS);
1876 }
1877
1878 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
1879 struct iwl_bt_uart_msg *uart_msg)
1880 {
1881 u8 kill_msk;
1882 static const __le32 bt_kill_ack_msg[2] = {
1883 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
1884 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1885 static const __le32 bt_kill_cts_msg[2] = {
1886 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
1887 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1888
1889 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
1890 ? 1 : 0;
1891 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
1892 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
1893 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
1894 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
1895 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
1896 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
1897
1898 /* schedule to send runtime bt_config */
1899 queue_work(priv->workqueue, &priv->bt_runtime_config);
1900 }
1901 }
1902
1903 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
1904 struct iwl_rx_mem_buffer *rxb)
1905 {
1906 unsigned long flags;
1907 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1908 struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
1909 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
1910
1911 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1912 /* bt coex disabled */
1913 return;
1914 }
1915
1916 IWL_DEBUG_NOTIF(priv, "BT Coex notification:\n");
1917 IWL_DEBUG_NOTIF(priv, " status: %d\n", coex->bt_status);
1918 IWL_DEBUG_NOTIF(priv, " traffic load: %d\n", coex->bt_traffic_load);
1919 IWL_DEBUG_NOTIF(priv, " CI compliance: %d\n",
1920 coex->bt_ci_compliance);
1921 iwlagn_print_uartmsg(priv, uart_msg);
1922
1923 priv->last_bt_traffic_load = priv->bt_traffic_load;
1924 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
1925 if (priv->bt_status != coex->bt_status ||
1926 priv->last_bt_traffic_load != coex->bt_traffic_load) {
1927 if (coex->bt_status) {
1928 /* BT on */
1929 if (!priv->bt_ch_announce)
1930 priv->bt_traffic_load =
1931 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1932 else
1933 priv->bt_traffic_load =
1934 coex->bt_traffic_load;
1935 } else {
1936 /* BT off */
1937 priv->bt_traffic_load =
1938 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
1939 }
1940 priv->bt_status = coex->bt_status;
1941 queue_work(priv->workqueue,
1942 &priv->bt_traffic_change_work);
1943 }
1944 }
1945
1946 iwlagn_set_kill_msk(priv, uart_msg);
1947
1948 /* FIXME: based on notification, adjust the prio_boost */
1949
1950 spin_lock_irqsave(&priv->lock, flags);
1951 priv->bt_ci_compliance = coex->bt_ci_compliance;
1952 spin_unlock_irqrestore(&priv->lock, flags);
1953 }
1954
1955 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
1956 {
1957 iwlagn_rx_handler_setup(priv);
1958 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
1959 iwlagn_bt_coex_profile_notif;
1960 }
1961
1962 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
1963 {
1964 iwlagn_setup_deferred_work(priv);
1965
1966 INIT_WORK(&priv->bt_traffic_change_work,
1967 iwlagn_bt_traffic_change_work);
1968 }
1969
1970 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
1971 {
1972 cancel_work_sync(&priv->bt_traffic_change_work);
1973 }
1974
1975 static bool is_single_rx_stream(struct iwl_priv *priv)
1976 {
1977 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1978 priv->current_ht_config.single_chain_sufficient;
1979 }
1980
1981 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
1982 #define IWL_NUM_RX_CHAINS_SINGLE 2
1983 #define IWL_NUM_IDLE_CHAINS_DUAL 2
1984 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
1985
1986 /*
1987 * Determine how many receiver/antenna chains to use.
1988 *
1989 * More provides better reception via diversity. Fewer saves power
1990 * at the expense of throughput, but only when not in powersave to
1991 * start with.
1992 *
1993 * MIMO (dual stream) requires at least 2, but works better with 3.
1994 * This does not determine *which* chains to use, just how many.
1995 */
1996 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1997 {
1998 if (priv->cfg->bt_params &&
1999 priv->cfg->bt_params->advanced_bt_coexist &&
2000 (priv->bt_full_concurrent ||
2001 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
2002 /*
2003 * only use chain 'A' in bt high traffic load or
2004 * full concurrency mode
2005 */
2006 return IWL_NUM_RX_CHAINS_SINGLE;
2007 }
2008 /* # of Rx chains to use when expecting MIMO. */
2009 if (is_single_rx_stream(priv))
2010 return IWL_NUM_RX_CHAINS_SINGLE;
2011 else
2012 return IWL_NUM_RX_CHAINS_MULTIPLE;
2013 }
2014
2015 /*
2016 * When we are in power saving mode, unless device support spatial
2017 * multiplexing power save, use the active count for rx chain count.
2018 */
2019 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
2020 {
2021 /* # Rx chains when idling, depending on SMPS mode */
2022 switch (priv->current_ht_config.smps) {
2023 case IEEE80211_SMPS_STATIC:
2024 case IEEE80211_SMPS_DYNAMIC:
2025 return IWL_NUM_IDLE_CHAINS_SINGLE;
2026 case IEEE80211_SMPS_OFF:
2027 return active_cnt;
2028 default:
2029 WARN(1, "invalid SMPS mode %d",
2030 priv->current_ht_config.smps);
2031 return active_cnt;
2032 }
2033 }
2034
2035 /* up to 4 chains */
2036 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
2037 {
2038 u8 res;
2039 res = (chain_bitmap & BIT(0)) >> 0;
2040 res += (chain_bitmap & BIT(1)) >> 1;
2041 res += (chain_bitmap & BIT(2)) >> 2;
2042 res += (chain_bitmap & BIT(3)) >> 3;
2043 return res;
2044 }
2045
2046 /**
2047 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2048 *
2049 * Selects how many and which Rx receivers/antennas/chains to use.
2050 * This should not be used for scan command ... it puts data in wrong place.
2051 */
2052 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2053 {
2054 bool is_single = is_single_rx_stream(priv);
2055 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
2056 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
2057 u32 active_chains;
2058 u16 rx_chain;
2059
2060 /* Tell uCode which antennas are actually connected.
2061 * Before first association, we assume all antennas are connected.
2062 * Just after first association, iwl_chain_noise_calibration()
2063 * checks which antennas actually *are* connected. */
2064 if (priv->chain_noise_data.active_chains)
2065 active_chains = priv->chain_noise_data.active_chains;
2066 else
2067 active_chains = priv->hw_params.valid_rx_ant;
2068
2069 if (priv->cfg->bt_params &&
2070 priv->cfg->bt_params->advanced_bt_coexist &&
2071 (priv->bt_full_concurrent ||
2072 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
2073 /*
2074 * only use chain 'A' in bt high traffic load or
2075 * full concurrency mode
2076 */
2077 active_chains = first_antenna(active_chains);
2078 }
2079
2080 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
2081
2082 /* How many receivers should we use? */
2083 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
2084 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
2085
2086
2087 /* correct rx chain count according hw settings
2088 * and chain noise calibration
2089 */
2090 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
2091 if (valid_rx_cnt < active_rx_cnt)
2092 active_rx_cnt = valid_rx_cnt;
2093
2094 if (valid_rx_cnt < idle_rx_cnt)
2095 idle_rx_cnt = valid_rx_cnt;
2096
2097 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
2098 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
2099
2100 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
2101
2102 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
2103 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2104 else
2105 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2106
2107 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
2108 ctx->staging.rx_chain,
2109 active_rx_cnt, idle_rx_cnt);
2110
2111 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
2112 active_rx_cnt < idle_rx_cnt);
2113 }
2114
2115 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
2116 {
2117 int i;
2118 u8 ind = ant;
2119
2120 if (priv->band == IEEE80211_BAND_2GHZ &&
2121 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
2122 return 0;
2123
2124 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
2125 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
2126 if (valid & BIT(ind))
2127 return ind;
2128 }
2129 return ant;
2130 }
2131
2132 static const char *get_csr_string(int cmd)
2133 {
2134 switch (cmd) {
2135 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2136 IWL_CMD(CSR_INT_COALESCING);
2137 IWL_CMD(CSR_INT);
2138 IWL_CMD(CSR_INT_MASK);
2139 IWL_CMD(CSR_FH_INT_STATUS);
2140 IWL_CMD(CSR_GPIO_IN);
2141 IWL_CMD(CSR_RESET);
2142 IWL_CMD(CSR_GP_CNTRL);
2143 IWL_CMD(CSR_HW_REV);
2144 IWL_CMD(CSR_EEPROM_REG);
2145 IWL_CMD(CSR_EEPROM_GP);
2146 IWL_CMD(CSR_OTP_GP_REG);
2147 IWL_CMD(CSR_GIO_REG);
2148 IWL_CMD(CSR_GP_UCODE_REG);
2149 IWL_CMD(CSR_GP_DRIVER_REG);
2150 IWL_CMD(CSR_UCODE_DRV_GP1);
2151 IWL_CMD(CSR_UCODE_DRV_GP2);
2152 IWL_CMD(CSR_LED_REG);
2153 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2154 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2155 IWL_CMD(CSR_ANA_PLL_CFG);
2156 IWL_CMD(CSR_HW_REV_WA_REG);
2157 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2158 default:
2159 return "UNKNOWN";
2160 }
2161 }
2162
2163 void iwl_dump_csr(struct iwl_priv *priv)
2164 {
2165 int i;
2166 static const u32 csr_tbl[] = {
2167 CSR_HW_IF_CONFIG_REG,
2168 CSR_INT_COALESCING,
2169 CSR_INT,
2170 CSR_INT_MASK,
2171 CSR_FH_INT_STATUS,
2172 CSR_GPIO_IN,
2173 CSR_RESET,
2174 CSR_GP_CNTRL,
2175 CSR_HW_REV,
2176 CSR_EEPROM_REG,
2177 CSR_EEPROM_GP,
2178 CSR_OTP_GP_REG,
2179 CSR_GIO_REG,
2180 CSR_GP_UCODE_REG,
2181 CSR_GP_DRIVER_REG,
2182 CSR_UCODE_DRV_GP1,
2183 CSR_UCODE_DRV_GP2,
2184 CSR_LED_REG,
2185 CSR_DRAM_INT_TBL_REG,
2186 CSR_GIO_CHICKEN_BITS,
2187 CSR_ANA_PLL_CFG,
2188 CSR_HW_REV_WA_REG,
2189 CSR_DBG_HPET_MEM_REG
2190 };
2191 IWL_ERR(priv, "CSR values:\n");
2192 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2193 "CSR_INT_PERIODIC_REG)\n");
2194 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2195 IWL_ERR(priv, " %25s: 0X%08x\n",
2196 get_csr_string(csr_tbl[i]),
2197 iwl_read32(priv, csr_tbl[i]));
2198 }
2199 }
2200
2201 static const char *get_fh_string(int cmd)
2202 {
2203 switch (cmd) {
2204 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2205 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2206 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2207 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2208 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2209 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2210 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2211 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2212 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2213 default:
2214 return "UNKNOWN";
2215 }
2216 }
2217
2218 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2219 {
2220 int i;
2221 #ifdef CONFIG_IWLWIFI_DEBUG
2222 int pos = 0;
2223 size_t bufsz = 0;
2224 #endif
2225 static const u32 fh_tbl[] = {
2226 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2227 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2228 FH_RSCSR_CHNL0_WPTR,
2229 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2230 FH_MEM_RSSR_SHARED_CTRL_REG,
2231 FH_MEM_RSSR_RX_STATUS_REG,
2232 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2233 FH_TSSR_TX_STATUS_REG,
2234 FH_TSSR_TX_ERROR_REG
2235 };
2236 #ifdef CONFIG_IWLWIFI_DEBUG
2237 if (display) {
2238 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2239 *buf = kmalloc(bufsz, GFP_KERNEL);
2240 if (!*buf)
2241 return -ENOMEM;
2242 pos += scnprintf(*buf + pos, bufsz - pos,
2243 "FH register values:\n");
2244 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2245 pos += scnprintf(*buf + pos, bufsz - pos,
2246 " %34s: 0X%08x\n",
2247 get_fh_string(fh_tbl[i]),
2248 iwl_read_direct32(priv, fh_tbl[i]));
2249 }
2250 return pos;
2251 }
2252 #endif
2253 IWL_ERR(priv, "FH register values:\n");
2254 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2255 IWL_ERR(priv, " %34s: 0X%08x\n",
2256 get_fh_string(fh_tbl[i]),
2257 iwl_read_direct32(priv, fh_tbl[i]));
2258 }
2259 return 0;
2260 }
2261
2262 /* notification wait support */
2263 void iwlagn_init_notification_wait(struct iwl_priv *priv,
2264 struct iwl_notification_wait *wait_entry,
2265 u8 cmd,
2266 void (*fn)(struct iwl_priv *priv,
2267 struct iwl_rx_packet *pkt,
2268 void *data),
2269 void *fn_data)
2270 {
2271 wait_entry->fn = fn;
2272 wait_entry->fn_data = fn_data;
2273 wait_entry->cmd = cmd;
2274 wait_entry->triggered = false;
2275 wait_entry->aborted = false;
2276
2277 spin_lock_bh(&priv->_agn.notif_wait_lock);
2278 list_add(&wait_entry->list, &priv->_agn.notif_waits);
2279 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2280 }
2281
2282 int iwlagn_wait_notification(struct iwl_priv *priv,
2283 struct iwl_notification_wait *wait_entry,
2284 unsigned long timeout)
2285 {
2286 int ret;
2287
2288 ret = wait_event_timeout(priv->_agn.notif_waitq,
2289 wait_entry->triggered || wait_entry->aborted,
2290 timeout);
2291
2292 spin_lock_bh(&priv->_agn.notif_wait_lock);
2293 list_del(&wait_entry->list);
2294 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2295
2296 if (wait_entry->aborted)
2297 return -EIO;
2298
2299 /* return value is always >= 0 */
2300 if (ret <= 0)
2301 return -ETIMEDOUT;
2302 return 0;
2303 }
2304
2305 void iwlagn_remove_notification(struct iwl_priv *priv,
2306 struct iwl_notification_wait *wait_entry)
2307 {
2308 spin_lock_bh(&priv->_agn.notif_wait_lock);
2309 list_del(&wait_entry->list);
2310 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2311 }
2312
2313 int iwlagn_start_device(struct iwl_priv *priv)
2314 {
2315 int ret;
2316
2317 if (iwl_prepare_card_hw(priv)) {
2318 IWL_WARN(priv, "Exit HW not ready\n");
2319 return -EIO;
2320 }
2321
2322 /* If platform's RF_KILL switch is NOT set to KILL */
2323 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2324 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2325 else
2326 set_bit(STATUS_RF_KILL_HW, &priv->status);
2327
2328 if (iwl_is_rfkill(priv)) {
2329 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2330 iwl_enable_interrupts(priv);
2331 return -ERFKILL;
2332 }
2333
2334 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2335
2336 ret = iwlagn_hw_nic_init(priv);
2337 if (ret) {
2338 IWL_ERR(priv, "Unable to init nic\n");
2339 return ret;
2340 }
2341
2342 /* make sure rfkill handshake bits are cleared */
2343 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2344 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2345 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2346
2347 /* clear (again), then enable host interrupts */
2348 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2349 iwl_enable_interrupts(priv);
2350
2351 /* really make sure rfkill handshake bits are cleared */
2352 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2353 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2354
2355 return 0;
2356 }
2357
2358 void iwlagn_stop_device(struct iwl_priv *priv)
2359 {
2360 unsigned long flags;
2361
2362 /* stop and reset the on-board processor */
2363 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2364
2365 /* tell the device to stop sending interrupts */
2366 spin_lock_irqsave(&priv->lock, flags);
2367 iwl_disable_interrupts(priv);
2368 spin_unlock_irqrestore(&priv->lock, flags);
2369 iwl_synchronize_irq(priv);
2370
2371 /* device going down, Stop using ICT table */
2372 iwl_disable_ict(priv);
2373
2374 /*
2375 * If a HW restart happens during firmware loading,
2376 * then the firmware loading might call this function
2377 * and later it might be called again due to the
2378 * restart. So don't process again if the device is
2379 * already dead.
2380 */
2381 if (test_bit(STATUS_DEVICE_ENABLED, &priv->status)) {
2382 iwlagn_txq_ctx_stop(priv);
2383 iwlagn_rxq_stop(priv);
2384
2385 /* Power-down device's busmaster DMA clocks */
2386 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2387 udelay(5);
2388 }
2389
2390 /* Make sure (redundant) we've released our request to stay awake */
2391 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2392
2393 /* Stop the device, and put it in low power state */
2394 iwl_apm_stop(priv);
2395 }