1 /******************************************************************************
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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.
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.
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,
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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>
38 #include "iwl-helpers.h"
39 #include "iwl-agn-hw.h"
43 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
45 return le32_to_cpup((__le32 *)&tx_resp->status +
46 tx_resp->frame_count) & MAX_SN;
49 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
51 status &= TX_STATUS_MSK;
54 case TX_STATUS_POSTPONE_DELAY:
55 priv->_agn.reply_tx_stats.pp_delay++;
57 case TX_STATUS_POSTPONE_FEW_BYTES:
58 priv->_agn.reply_tx_stats.pp_few_bytes++;
60 case TX_STATUS_POSTPONE_BT_PRIO:
61 priv->_agn.reply_tx_stats.pp_bt_prio++;
63 case TX_STATUS_POSTPONE_QUIET_PERIOD:
64 priv->_agn.reply_tx_stats.pp_quiet_period++;
66 case TX_STATUS_POSTPONE_CALC_TTAK:
67 priv->_agn.reply_tx_stats.pp_calc_ttak++;
69 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
70 priv->_agn.reply_tx_stats.int_crossed_retry++;
72 case TX_STATUS_FAIL_SHORT_LIMIT:
73 priv->_agn.reply_tx_stats.short_limit++;
75 case TX_STATUS_FAIL_LONG_LIMIT:
76 priv->_agn.reply_tx_stats.long_limit++;
78 case TX_STATUS_FAIL_FIFO_UNDERRUN:
79 priv->_agn.reply_tx_stats.fifo_underrun++;
81 case TX_STATUS_FAIL_DRAIN_FLOW:
82 priv->_agn.reply_tx_stats.drain_flow++;
84 case TX_STATUS_FAIL_RFKILL_FLUSH:
85 priv->_agn.reply_tx_stats.rfkill_flush++;
87 case TX_STATUS_FAIL_LIFE_EXPIRE:
88 priv->_agn.reply_tx_stats.life_expire++;
90 case TX_STATUS_FAIL_DEST_PS:
91 priv->_agn.reply_tx_stats.dest_ps++;
93 case TX_STATUS_FAIL_HOST_ABORTED:
94 priv->_agn.reply_tx_stats.host_abort++;
96 case TX_STATUS_FAIL_BT_RETRY:
97 priv->_agn.reply_tx_stats.bt_retry++;
99 case TX_STATUS_FAIL_STA_INVALID:
100 priv->_agn.reply_tx_stats.sta_invalid++;
102 case TX_STATUS_FAIL_FRAG_DROPPED:
103 priv->_agn.reply_tx_stats.frag_drop++;
105 case TX_STATUS_FAIL_TID_DISABLE:
106 priv->_agn.reply_tx_stats.tid_disable++;
108 case TX_STATUS_FAIL_FIFO_FLUSHED:
109 priv->_agn.reply_tx_stats.fifo_flush++;
111 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
112 priv->_agn.reply_tx_stats.insuff_cf_poll++;
114 case TX_STATUS_FAIL_PASSIVE_NO_RX:
115 priv->_agn.reply_tx_stats.fail_hw_drop++;
117 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
118 priv->_agn.reply_tx_stats.sta_color_mismatch++;
121 priv->_agn.reply_tx_stats.unknown++;
126 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
128 status &= AGG_TX_STATUS_MSK;
131 case AGG_TX_STATE_UNDERRUN_MSK:
132 priv->_agn.reply_agg_tx_stats.underrun++;
134 case AGG_TX_STATE_BT_PRIO_MSK:
135 priv->_agn.reply_agg_tx_stats.bt_prio++;
137 case AGG_TX_STATE_FEW_BYTES_MSK:
138 priv->_agn.reply_agg_tx_stats.few_bytes++;
140 case AGG_TX_STATE_ABORT_MSK:
141 priv->_agn.reply_agg_tx_stats.abort++;
143 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
144 priv->_agn.reply_agg_tx_stats.last_sent_ttl++;
146 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
147 priv->_agn.reply_agg_tx_stats.last_sent_try++;
149 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
150 priv->_agn.reply_agg_tx_stats.last_sent_bt_kill++;
152 case AGG_TX_STATE_SCD_QUERY_MSK:
153 priv->_agn.reply_agg_tx_stats.scd_query++;
155 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
156 priv->_agn.reply_agg_tx_stats.bad_crc32++;
158 case AGG_TX_STATE_RESPONSE_MSK:
159 priv->_agn.reply_agg_tx_stats.response++;
161 case AGG_TX_STATE_DUMP_TX_MSK:
162 priv->_agn.reply_agg_tx_stats.dump_tx++;
164 case AGG_TX_STATE_DELAY_TX_MSK:
165 priv->_agn.reply_agg_tx_stats.delay_tx++;
168 priv->_agn.reply_agg_tx_stats.unknown++;
173 static void iwlagn_set_tx_status(struct iwl_priv *priv,
174 struct ieee80211_tx_info *info,
175 struct iwlagn_tx_resp *tx_resp,
176 int txq_id, bool is_agg)
178 u16 status = le16_to_cpu(tx_resp->status.status);
180 info->status.rates[0].count = tx_resp->failure_frame + 1;
182 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
183 info->flags |= iwl_tx_status_to_mac80211(status);
184 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
186 if (!iwl_is_tx_success(status))
187 iwlagn_count_tx_err_status(priv, status);
189 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
192 iwl_get_tx_fail_reason(status), status,
193 le32_to_cpu(tx_resp->rate_n_flags),
194 tx_resp->failure_frame);
197 #ifdef CONFIG_IWLWIFI_DEBUG
198 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
200 const char *iwl_get_agg_tx_fail_reason(u16 status)
202 status &= AGG_TX_STATUS_MSK;
204 case AGG_TX_STATE_TRANSMITTED:
206 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
207 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
208 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
209 AGG_TX_STATE_FAIL(ABORT_MSK);
210 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
211 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
212 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
213 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
214 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
215 AGG_TX_STATE_FAIL(RESPONSE_MSK);
216 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
217 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
222 #endif /* CONFIG_IWLWIFI_DEBUG */
224 static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
225 struct iwl_ht_agg *agg,
226 struct iwlagn_tx_resp *tx_resp,
227 int txq_id, u16 start_idx)
230 struct agg_tx_status *frame_status = &tx_resp->status;
231 struct ieee80211_hdr *hdr = NULL;
235 if (agg->wait_for_ba)
236 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
238 agg->frame_count = tx_resp->frame_count;
239 agg->start_idx = start_idx;
240 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
243 /* # frames attempted by Tx command */
244 if (agg->frame_count == 1) {
245 /* Only one frame was attempted; no block-ack will arrive */
248 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
249 agg->frame_count, agg->start_idx, idx);
250 iwlagn_set_tx_status(priv,
252 priv->txq[txq_id].txb[idx].skb),
253 tx_resp, txq_id, true);
254 agg->wait_for_ba = 0;
256 /* Two or more frames were attempted; expect block-ack */
260 * Start is the lowest frame sent. It may not be the first
261 * frame in the batch; we figure this out dynamically during
262 * the following loop.
264 int start = agg->start_idx;
266 /* Construct bit-map of pending frames within Tx window */
267 for (i = 0; i < agg->frame_count; i++) {
269 status = le16_to_cpu(frame_status[i].status);
270 seq = le16_to_cpu(frame_status[i].sequence);
271 idx = SEQ_TO_INDEX(seq);
272 txq_id = SEQ_TO_QUEUE(seq);
274 if (status & AGG_TX_STATUS_MSK)
275 iwlagn_count_agg_tx_err_status(priv, status);
277 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
278 AGG_TX_STATE_ABORT_MSK))
281 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
282 agg->frame_count, txq_id, idx);
283 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
284 "try-count (0x%08x)\n",
285 iwl_get_agg_tx_fail_reason(status),
286 status & AGG_TX_STATUS_MSK,
287 status & AGG_TX_TRY_MSK);
289 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
292 "BUG_ON idx doesn't point to valid skb"
293 " idx=%d, txq_id=%d\n", idx, txq_id);
297 sc = le16_to_cpu(hdr->seq_ctrl);
298 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
300 "BUG_ON idx doesn't match seq control"
301 " idx=%d, seq_idx=%d, seq=%d\n",
307 IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
308 i, idx, SEQ_TO_SN(sc));
311 * sh -> how many frames ahead of the starting frame is
314 * Note that all frames sent in the batch must be in a
315 * 64-frame window, so this number should be in [0,63].
316 * If outside of this window, then we've found a new
317 * "first" frame in the batch and need to change start.
322 * If >= 64, out of window. start must be at the front
323 * of the circular buffer, idx must be near the end of
324 * the buffer, and idx is the new "first" frame. Shift
325 * the indices around.
328 /* Shift bitmap by start - idx, wrapped */
329 sh = 0x100 - idx + start;
330 bitmap = bitmap << sh;
331 /* Now idx is the new start so sh = 0 */
335 * If <= -64 then wraps the 256-pkt circular buffer
336 * (e.g., start = 255 and idx = 0, sh should be 1)
338 } else if (sh <= -64) {
339 sh = 0x100 - start + idx;
341 * If < 0 but > -64, out of window. idx is before start
342 * but not wrapped. Shift the indices around.
345 /* Shift by how far start is ahead of idx */
347 bitmap = bitmap << sh;
348 /* Now idx is the new start so sh = 0 */
352 /* Sequence number start + sh was sent in this batch */
353 bitmap |= 1ULL << sh;
354 IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
355 start, (unsigned long long)bitmap);
359 * Store the bitmap and possibly the new start, if we wrapped
362 agg->bitmap = bitmap;
363 agg->start_idx = start;
364 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
365 agg->frame_count, agg->start_idx,
366 (unsigned long long)agg->bitmap);
369 agg->wait_for_ba = 1;
374 void iwl_check_abort_status(struct iwl_priv *priv,
375 u8 frame_count, u32 status)
377 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
378 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
379 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
380 queue_work(priv->workqueue, &priv->tx_flush);
384 static void iwlagn_rx_reply_tx(struct iwl_priv *priv,
385 struct iwl_rx_mem_buffer *rxb)
387 struct iwl_rx_packet *pkt = rxb_addr(rxb);
388 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
389 int txq_id = SEQ_TO_QUEUE(sequence);
390 int index = SEQ_TO_INDEX(sequence);
391 struct iwl_tx_queue *txq = &priv->txq[txq_id];
392 struct ieee80211_tx_info *info;
393 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
394 u32 status = le16_to_cpu(tx_resp->status.status);
400 if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
401 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
402 "is out of range [0-%d] %d %d\n", txq_id,
403 index, txq->q.n_bd, txq->q.write_ptr,
408 txq->time_stamp = jiffies;
409 info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
410 memset(&info->status, 0, sizeof(info->status));
412 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
413 IWLAGN_TX_RES_TID_POS;
414 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
415 IWLAGN_TX_RES_RA_POS;
417 spin_lock_irqsave(&priv->sta_lock, flags);
418 if (txq->sched_retry) {
419 const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
420 struct iwl_ht_agg *agg;
422 agg = &priv->stations[sta_id].tid[tid].agg;
424 * If the BT kill count is non-zero, we'll get this
425 * notification again.
427 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
428 priv->cfg->bt_params &&
429 priv->cfg->bt_params->advanced_bt_coexist) {
430 IWL_WARN(priv, "receive reply tx with bt_kill\n");
432 iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
434 /* check if BAR is needed */
435 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
436 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
438 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
439 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
440 IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
441 "scd_ssn=%d idx=%d txq=%d swq=%d\n",
442 scd_ssn , index, txq_id, txq->swq_id);
444 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
445 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
447 if (priv->mac80211_registered &&
448 (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
449 (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
450 iwl_wake_queue(priv, txq);
453 iwlagn_set_tx_status(priv, info, tx_resp, txq_id, false);
454 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
455 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
457 if (priv->mac80211_registered &&
458 (iwl_queue_space(&txq->q) > txq->q.low_mark))
459 iwl_wake_queue(priv, txq);
462 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
464 iwl_check_abort_status(priv, tx_resp->frame_count, status);
465 spin_unlock_irqrestore(&priv->sta_lock, flags);
468 void iwlagn_rx_handler_setup(struct iwl_priv *priv)
470 /* init calibration handlers */
471 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
472 iwlagn_rx_calib_result;
473 priv->rx_handlers[CALIBRATION_COMPLETE_NOTIFICATION] =
474 iwlagn_rx_calib_complete;
475 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
478 void iwlagn_setup_deferred_work(struct iwl_priv *priv)
480 /* in agn, the tx power calibration is done in uCode */
481 priv->disable_tx_power_cal = 1;
484 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
486 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
487 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
490 int iwlagn_send_tx_power(struct iwl_priv *priv)
492 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
495 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
496 "TX Power requested while scanning!\n"))
499 /* half dBm need to multiply */
500 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
502 if (priv->tx_power_lmt_in_half_dbm &&
503 priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
505 * For the newer devices which using enhanced/extend tx power
506 * table in EEPROM, the format is in half dBm. driver need to
507 * convert to dBm format before report to mac80211.
508 * By doing so, there is a possibility of 1/2 dBm resolution
509 * lost. driver will perform "round-up" operation before
510 * reporting, but it will cause 1/2 dBm tx power over the
511 * regulatory limit. Perform the checking here, if the
512 * "tx_power_user_lmt" is higher than EEPROM value (in
513 * half-dBm format), lower the tx power based on EEPROM
515 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
517 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
518 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
520 if (IWL_UCODE_API(priv->ucode_ver) == 1)
521 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
523 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
525 return iwl_send_cmd_pdu(priv, tx_ant_cfg_cmd, sizeof(tx_power_cmd),
529 void iwlagn_temperature(struct iwl_priv *priv)
531 /* store temperature from statistics (in Celsius) */
533 le32_to_cpu(priv->_agn.statistics.general.common.temperature);
534 iwl_tt_handler(priv);
537 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
539 struct iwl_eeprom_calib_hdr {
545 hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
554 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
558 if ((address & INDIRECT_ADDRESS) == 0)
561 switch (address & INDIRECT_TYPE_MSK) {
563 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
565 case INDIRECT_GENERAL:
566 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
568 case INDIRECT_REGULATORY:
569 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
571 case INDIRECT_CALIBRATION:
572 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
574 case INDIRECT_PROCESS_ADJST:
575 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
577 case INDIRECT_OTHERS:
578 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
581 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
582 address & INDIRECT_TYPE_MSK);
586 /* translate the offset from words to byte */
587 return (address & ADDRESS_MSK) + (offset << 1);
590 const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv,
593 u32 address = eeprom_indirect_address(priv, offset);
594 BUG_ON(address >= priv->cfg->base_params->eeprom_size);
595 return &priv->eeprom[address];
598 struct iwl_mod_params iwlagn_mod_params = {
601 /* the rest are 0 by default */
604 void iwlagn_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
608 spin_lock_irqsave(&rxq->lock, flags);
609 INIT_LIST_HEAD(&rxq->rx_free);
610 INIT_LIST_HEAD(&rxq->rx_used);
611 /* Fill the rx_used queue with _all_ of the Rx buffers */
612 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
613 /* In the reset function, these buffers may have been allocated
614 * to an SKB, so we need to unmap and free potential storage */
615 if (rxq->pool[i].page != NULL) {
616 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
617 PAGE_SIZE << priv->hw_params.rx_page_order,
619 __iwl_free_pages(priv, rxq->pool[i].page);
620 rxq->pool[i].page = NULL;
622 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
625 for (i = 0; i < RX_QUEUE_SIZE; i++)
626 rxq->queue[i] = NULL;
628 /* Set us so that we have processed and used all buffers, but have
629 * not restocked the Rx queue with fresh buffers */
630 rxq->read = rxq->write = 0;
631 rxq->write_actual = 0;
633 spin_unlock_irqrestore(&rxq->lock, flags);
636 int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
639 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
640 u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */
642 if (!priv->cfg->base_params->use_isr_legacy)
643 rb_timeout = RX_RB_TIMEOUT;
645 if (priv->cfg->mod_params->amsdu_size_8K)
646 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
648 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
651 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
653 /* Reset driver's Rx queue write index */
654 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
656 /* Tell device where to find RBD circular buffer in DRAM */
657 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
658 (u32)(rxq->bd_dma >> 8));
660 /* Tell device where in DRAM to update its Rx status */
661 iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
662 rxq->rb_stts_dma >> 4);
665 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
666 * the credit mechanism in 5000 HW RX FIFO
667 * Direct rx interrupts to hosts
668 * Rx buffer size 4 or 8k
672 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
673 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
674 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
675 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
676 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
678 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
679 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
681 /* Set interrupt coalescing timer to default (2048 usecs) */
682 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
687 static void iwlagn_set_pwr_vmain(struct iwl_priv *priv)
690 * (for documentation purposes)
691 * to set power to V_AUX, do:
693 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
694 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
695 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
696 ~APMG_PS_CTRL_MSK_PWR_SRC);
699 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
700 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
701 ~APMG_PS_CTRL_MSK_PWR_SRC);
704 int iwlagn_hw_nic_init(struct iwl_priv *priv)
707 struct iwl_rx_queue *rxq = &priv->rxq;
711 spin_lock_irqsave(&priv->lock, flags);
712 priv->cfg->ops->lib->apm_ops.init(priv);
714 /* Set interrupt coalescing calibration timer to default (512 usecs) */
715 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
717 spin_unlock_irqrestore(&priv->lock, flags);
719 iwlagn_set_pwr_vmain(priv);
721 priv->cfg->ops->lib->apm_ops.config(priv);
723 /* Allocate the RX queue, or reset if it is already allocated */
725 ret = iwl_rx_queue_alloc(priv);
727 IWL_ERR(priv, "Unable to initialize Rx queue\n");
731 iwlagn_rx_queue_reset(priv, rxq);
733 iwlagn_rx_replenish(priv);
735 iwlagn_rx_init(priv, rxq);
737 spin_lock_irqsave(&priv->lock, flags);
739 rxq->need_update = 1;
740 iwl_rx_queue_update_write_ptr(priv, rxq);
742 spin_unlock_irqrestore(&priv->lock, flags);
744 /* Allocate or reset and init all Tx and Command queues */
746 ret = iwlagn_txq_ctx_alloc(priv);
750 iwlagn_txq_ctx_reset(priv);
752 if (priv->cfg->base_params->shadow_reg_enable) {
753 /* enable shadow regs in HW */
754 iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL,
758 set_bit(STATUS_INIT, &priv->status);
764 * iwlagn_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
766 static inline __le32 iwlagn_dma_addr2rbd_ptr(struct iwl_priv *priv,
769 return cpu_to_le32((u32)(dma_addr >> 8));
773 * iwlagn_rx_queue_restock - refill RX queue from pre-allocated pool
775 * If there are slots in the RX queue that need to be restocked,
776 * and we have free pre-allocated buffers, fill the ranks as much
777 * as we can, pulling from rx_free.
779 * This moves the 'write' index forward to catch up with 'processed', and
780 * also updates the memory address in the firmware to reference the new
783 void iwlagn_rx_queue_restock(struct iwl_priv *priv)
785 struct iwl_rx_queue *rxq = &priv->rxq;
786 struct list_head *element;
787 struct iwl_rx_mem_buffer *rxb;
790 spin_lock_irqsave(&rxq->lock, flags);
791 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
792 /* The overwritten rxb must be a used one */
793 rxb = rxq->queue[rxq->write];
794 BUG_ON(rxb && rxb->page);
796 /* Get next free Rx buffer, remove from free list */
797 element = rxq->rx_free.next;
798 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
801 /* Point to Rx buffer via next RBD in circular buffer */
802 rxq->bd[rxq->write] = iwlagn_dma_addr2rbd_ptr(priv,
804 rxq->queue[rxq->write] = rxb;
805 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
808 spin_unlock_irqrestore(&rxq->lock, flags);
809 /* If the pre-allocated buffer pool is dropping low, schedule to
811 if (rxq->free_count <= RX_LOW_WATERMARK)
812 queue_work(priv->workqueue, &priv->rx_replenish);
815 /* If we've added more space for the firmware to place data, tell it.
816 * Increment device's write pointer in multiples of 8. */
817 if (rxq->write_actual != (rxq->write & ~0x7)) {
818 spin_lock_irqsave(&rxq->lock, flags);
819 rxq->need_update = 1;
820 spin_unlock_irqrestore(&rxq->lock, flags);
821 iwl_rx_queue_update_write_ptr(priv, rxq);
826 * iwlagn_rx_replenish - Move all used packet from rx_used to rx_free
828 * When moving to rx_free an SKB is allocated for the slot.
830 * Also restock the Rx queue via iwl_rx_queue_restock.
831 * This is called as a scheduled work item (except for during initialization)
833 void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority)
835 struct iwl_rx_queue *rxq = &priv->rxq;
836 struct list_head *element;
837 struct iwl_rx_mem_buffer *rxb;
840 gfp_t gfp_mask = priority;
843 spin_lock_irqsave(&rxq->lock, flags);
844 if (list_empty(&rxq->rx_used)) {
845 spin_unlock_irqrestore(&rxq->lock, flags);
848 spin_unlock_irqrestore(&rxq->lock, flags);
850 if (rxq->free_count > RX_LOW_WATERMARK)
851 gfp_mask |= __GFP_NOWARN;
853 if (priv->hw_params.rx_page_order > 0)
854 gfp_mask |= __GFP_COMP;
856 /* Alloc a new receive buffer */
857 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
860 IWL_DEBUG_INFO(priv, "alloc_pages failed, "
862 priv->hw_params.rx_page_order);
864 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
866 IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n",
867 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
869 /* We don't reschedule replenish work here -- we will
870 * call the restock method and if it still needs
871 * more buffers it will schedule replenish */
875 spin_lock_irqsave(&rxq->lock, flags);
877 if (list_empty(&rxq->rx_used)) {
878 spin_unlock_irqrestore(&rxq->lock, flags);
879 __free_pages(page, priv->hw_params.rx_page_order);
882 element = rxq->rx_used.next;
883 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
886 spin_unlock_irqrestore(&rxq->lock, flags);
890 /* Get physical address of the RB */
891 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
892 PAGE_SIZE << priv->hw_params.rx_page_order,
894 /* dma address must be no more than 36 bits */
895 BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
896 /* and also 256 byte aligned! */
897 BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
899 spin_lock_irqsave(&rxq->lock, flags);
901 list_add_tail(&rxb->list, &rxq->rx_free);
903 priv->alloc_rxb_page++;
905 spin_unlock_irqrestore(&rxq->lock, flags);
909 void iwlagn_rx_replenish(struct iwl_priv *priv)
913 iwlagn_rx_allocate(priv, GFP_KERNEL);
915 spin_lock_irqsave(&priv->lock, flags);
916 iwlagn_rx_queue_restock(priv);
917 spin_unlock_irqrestore(&priv->lock, flags);
920 void iwlagn_rx_replenish_now(struct iwl_priv *priv)
922 iwlagn_rx_allocate(priv, GFP_ATOMIC);
924 iwlagn_rx_queue_restock(priv);
927 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
928 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
929 * This free routine walks the list of POOL entries and if SKB is set to
930 * non NULL it is unmapped and freed
932 void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
935 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
936 if (rxq->pool[i].page != NULL) {
937 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
938 PAGE_SIZE << priv->hw_params.rx_page_order,
940 __iwl_free_pages(priv, rxq->pool[i].page);
941 rxq->pool[i].page = NULL;
945 dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
947 dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
948 rxq->rb_stts, rxq->rb_stts_dma);
953 int iwlagn_rxq_stop(struct iwl_priv *priv)
957 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
958 iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
959 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
964 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
969 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
970 if (rate_n_flags & RATE_MCS_HT_MSK) {
971 idx = (rate_n_flags & 0xff);
973 /* Legacy rate format, search for match in table */
975 if (band == IEEE80211_BAND_5GHZ)
976 band_offset = IWL_FIRST_OFDM_RATE;
977 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
978 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
979 return idx - band_offset;
985 /* Calc max signal level (dBm) among 3 possible receivers */
986 static inline int iwlagn_calc_rssi(struct iwl_priv *priv,
987 struct iwl_rx_phy_res *rx_resp)
989 return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
992 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
996 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
997 RX_RES_STATUS_STATION_FOUND)
998 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
999 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
1001 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
1003 /* packet was not encrypted */
1004 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
1005 RX_RES_STATUS_SEC_TYPE_NONE)
1008 /* packet was encrypted with unknown alg */
1009 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
1010 RX_RES_STATUS_SEC_TYPE_ERR)
1013 /* decryption was not done in HW */
1014 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
1015 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
1018 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
1020 case RX_RES_STATUS_SEC_TYPE_CCMP:
1021 /* alg is CCM: check MIC only */
1022 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
1024 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
1026 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
1030 case RX_RES_STATUS_SEC_TYPE_TKIP:
1031 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
1033 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
1036 /* fall through if TTAK OK */
1038 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
1039 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
1041 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
1045 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
1046 decrypt_in, decrypt_out);
1051 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
1052 struct ieee80211_hdr *hdr,
1055 struct iwl_rx_mem_buffer *rxb,
1056 struct ieee80211_rx_status *stats)
1058 struct sk_buff *skb;
1059 __le16 fc = hdr->frame_control;
1061 /* We only process data packets if the interface is open */
1062 if (unlikely(!priv->is_open)) {
1063 IWL_DEBUG_DROP_LIMIT(priv,
1064 "Dropping packet while interface is not open.\n");
1068 /* In case of HW accelerated crypto and bad decryption, drop */
1069 if (!priv->cfg->mod_params->sw_crypto &&
1070 iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
1073 skb = dev_alloc_skb(128);
1075 IWL_ERR(priv, "dev_alloc_skb failed\n");
1079 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
1081 iwl_update_stats(priv, false, fc, len);
1082 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
1084 ieee80211_rx(priv->hw, skb);
1085 priv->alloc_rxb_page--;
1089 /* Called for REPLY_RX (legacy ABG frames), or
1090 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
1091 void iwlagn_rx_reply_rx(struct iwl_priv *priv,
1092 struct iwl_rx_mem_buffer *rxb)
1094 struct ieee80211_hdr *header;
1095 struct ieee80211_rx_status rx_status;
1096 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1097 struct iwl_rx_phy_res *phy_res;
1098 __le32 rx_pkt_status;
1099 struct iwl_rx_mpdu_res_start *amsdu;
1105 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
1106 * REPLY_RX: physical layer info is in this buffer
1107 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
1108 * command and cached in priv->last_phy_res
1110 * Here we set up local variables depending on which command is
1113 if (pkt->hdr.cmd == REPLY_RX) {
1114 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
1115 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
1116 + phy_res->cfg_phy_cnt);
1118 len = le16_to_cpu(phy_res->byte_count);
1119 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
1120 phy_res->cfg_phy_cnt + len);
1121 ampdu_status = le32_to_cpu(rx_pkt_status);
1123 if (!priv->_agn.last_phy_res_valid) {
1124 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
1127 phy_res = &priv->_agn.last_phy_res;
1128 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
1129 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
1130 len = le16_to_cpu(amsdu->byte_count);
1131 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
1132 ampdu_status = iwlagn_translate_rx_status(priv,
1133 le32_to_cpu(rx_pkt_status));
1136 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
1137 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
1138 phy_res->cfg_phy_cnt);
1142 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
1143 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
1144 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
1145 le32_to_cpu(rx_pkt_status));
1149 /* This will be used in several places later */
1150 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
1152 /* rx_status carries information about the packet to mac80211 */
1153 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
1155 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel));
1156 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
1157 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1158 rx_status.rate_idx =
1159 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
1162 /* TSF isn't reliable. In order to allow smooth user experience,
1163 * this W/A doesn't propagate it to the mac80211 */
1164 /*rx_status.flag |= RX_FLAG_TSFT;*/
1166 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
1168 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
1169 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
1171 iwl_dbg_log_rx_data_frame(priv, len, header);
1172 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
1173 rx_status.signal, (unsigned long long)rx_status.mactime);
1178 * It seems that the antenna field in the phy flags value
1179 * is actually a bit field. This is undefined by radiotap,
1180 * it wants an actual antenna number but I always get "7"
1181 * for most legacy frames I receive indicating that the
1182 * same frame was received on all three RX chains.
1184 * I think this field should be removed in favor of a
1185 * new 802.11n radiotap field "RX chains" that is defined
1189 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1190 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1192 /* set the preamble flag if appropriate */
1193 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1194 rx_status.flag |= RX_FLAG_SHORTPRE;
1196 /* Set up the HT phy flags */
1197 if (rate_n_flags & RATE_MCS_HT_MSK)
1198 rx_status.flag |= RX_FLAG_HT;
1199 if (rate_n_flags & RATE_MCS_HT40_MSK)
1200 rx_status.flag |= RX_FLAG_40MHZ;
1201 if (rate_n_flags & RATE_MCS_SGI_MSK)
1202 rx_status.flag |= RX_FLAG_SHORT_GI;
1204 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1208 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
1209 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
1210 void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
1211 struct iwl_rx_mem_buffer *rxb)
1213 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1214 priv->_agn.last_phy_res_valid = true;
1215 memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
1216 sizeof(struct iwl_rx_phy_res));
1219 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
1220 struct ieee80211_vif *vif,
1221 enum ieee80211_band band,
1222 struct iwl_scan_channel *scan_ch)
1224 const struct ieee80211_supported_band *sband;
1225 u16 passive_dwell = 0;
1226 u16 active_dwell = 0;
1230 sband = iwl_get_hw_mode(priv, band);
1232 IWL_ERR(priv, "invalid band\n");
1236 active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1237 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1239 if (passive_dwell <= active_dwell)
1240 passive_dwell = active_dwell + 1;
1242 channel = iwl_get_single_channel_number(priv, band);
1244 scan_ch->channel = cpu_to_le16(channel);
1245 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1246 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1247 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1248 /* Set txpower levels to defaults */
1249 scan_ch->dsp_atten = 110;
1250 if (band == IEEE80211_BAND_5GHZ)
1251 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1253 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1256 IWL_ERR(priv, "no valid channel found\n");
1260 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
1261 struct ieee80211_vif *vif,
1262 enum ieee80211_band band,
1263 u8 is_active, u8 n_probes,
1264 struct iwl_scan_channel *scan_ch)
1266 struct ieee80211_channel *chan;
1267 const struct ieee80211_supported_band *sband;
1268 const struct iwl_channel_info *ch_info;
1269 u16 passive_dwell = 0;
1270 u16 active_dwell = 0;
1274 sband = iwl_get_hw_mode(priv, band);
1278 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1279 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1281 if (passive_dwell <= active_dwell)
1282 passive_dwell = active_dwell + 1;
1284 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1285 chan = priv->scan_request->channels[i];
1287 if (chan->band != band)
1290 channel = chan->hw_value;
1291 scan_ch->channel = cpu_to_le16(channel);
1293 ch_info = iwl_get_channel_info(priv, band, channel);
1294 if (!is_channel_valid(ch_info)) {
1295 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1300 if (!is_active || is_channel_passive(ch_info) ||
1301 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
1302 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1304 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
1307 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
1309 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1310 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1312 /* Set txpower levels to defaults */
1313 scan_ch->dsp_atten = 110;
1315 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1317 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1319 if (band == IEEE80211_BAND_5GHZ)
1320 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1322 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1324 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
1325 channel, le32_to_cpu(scan_ch->type),
1326 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
1327 "ACTIVE" : "PASSIVE",
1328 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
1329 active_dwell : passive_dwell);
1335 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1339 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
1341 struct iwl_host_cmd cmd = {
1342 .id = REPLY_SCAN_CMD,
1343 .len = sizeof(struct iwl_scan_cmd),
1344 .flags = CMD_SIZE_HUGE,
1346 struct iwl_scan_cmd *scan;
1347 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1351 enum ieee80211_band band;
1353 u8 rx_ant = priv->hw_params.valid_rx_ant;
1355 bool is_active = false;
1358 u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
1361 lockdep_assert_held(&priv->mutex);
1364 ctx = iwl_rxon_ctx_from_vif(vif);
1366 if (!priv->scan_cmd) {
1367 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
1368 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
1369 if (!priv->scan_cmd) {
1370 IWL_DEBUG_SCAN(priv,
1371 "fail to allocate memory for scan\n");
1375 scan = priv->scan_cmd;
1376 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
1378 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
1379 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
1381 if (iwl_is_any_associated(priv)) {
1384 u32 suspend_time = 100;
1385 u32 scan_suspend_time = 100;
1386 unsigned long flags;
1388 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
1389 spin_lock_irqsave(&priv->lock, flags);
1390 if (priv->is_internal_short_scan)
1393 interval = vif->bss_conf.beacon_int;
1394 spin_unlock_irqrestore(&priv->lock, flags);
1396 scan->suspend_time = 0;
1397 scan->max_out_time = cpu_to_le32(200 * 1024);
1399 interval = suspend_time;
1401 extra = (suspend_time / interval) << 22;
1402 scan_suspend_time = (extra |
1403 ((suspend_time % interval) * 1024));
1404 scan->suspend_time = cpu_to_le32(scan_suspend_time);
1405 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
1406 scan_suspend_time, interval);
1409 if (priv->is_internal_short_scan) {
1410 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
1411 } else if (priv->scan_request->n_ssids) {
1413 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
1414 for (i = 0; i < priv->scan_request->n_ssids; i++) {
1415 /* always does wildcard anyway */
1416 if (!priv->scan_request->ssids[i].ssid_len)
1418 scan->direct_scan[p].id = WLAN_EID_SSID;
1419 scan->direct_scan[p].len =
1420 priv->scan_request->ssids[i].ssid_len;
1421 memcpy(scan->direct_scan[p].ssid,
1422 priv->scan_request->ssids[i].ssid,
1423 priv->scan_request->ssids[i].ssid_len);
1429 IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
1431 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
1432 scan->tx_cmd.sta_id = ctx->bcast_sta_id;
1433 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1435 switch (priv->scan_band) {
1436 case IEEE80211_BAND_2GHZ:
1437 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
1438 chan_mod = le32_to_cpu(
1439 priv->contexts[IWL_RXON_CTX_BSS].active.flags &
1440 RXON_FLG_CHANNEL_MODE_MSK)
1441 >> RXON_FLG_CHANNEL_MODE_POS;
1442 if (chan_mod == CHANNEL_MODE_PURE_40) {
1443 rate = IWL_RATE_6M_PLCP;
1445 rate = IWL_RATE_1M_PLCP;
1446 rate_flags = RATE_MCS_CCK_MSK;
1449 * Internal scans are passive, so we can indiscriminately set
1450 * the BT ignore flag on 2.4 GHz since it applies to TX only.
1452 if (priv->cfg->bt_params &&
1453 priv->cfg->bt_params->advanced_bt_coexist)
1454 scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
1456 case IEEE80211_BAND_5GHZ:
1457 rate = IWL_RATE_6M_PLCP;
1460 IWL_WARN(priv, "Invalid scan band\n");
1465 * If active scanning is requested but a certain channel is
1466 * marked passive, we can do active scanning if we detect
1469 * There is an issue with some firmware versions that triggers
1470 * a sysassert on a "good CRC threshold" of zero (== disabled),
1471 * on a radar channel even though this means that we should NOT
1474 * The "good CRC threshold" is the number of frames that we
1475 * need to receive during our dwell time on a channel before
1476 * sending out probes -- setting this to a huge value will
1477 * mean we never reach it, but at the same time work around
1478 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
1479 * here instead of IWL_GOOD_CRC_TH_DISABLED.
1481 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
1482 IWL_GOOD_CRC_TH_NEVER;
1484 band = priv->scan_band;
1486 if (priv->cfg->scan_rx_antennas[band])
1487 rx_ant = priv->cfg->scan_rx_antennas[band];
1489 if (priv->cfg->scan_tx_antennas[band])
1490 scan_tx_antennas = priv->cfg->scan_tx_antennas[band];
1492 if (priv->cfg->bt_params &&
1493 priv->cfg->bt_params->advanced_bt_coexist &&
1494 priv->bt_full_concurrent) {
1495 /* operated as 1x1 in full concurrency mode */
1496 scan_tx_antennas = first_antenna(
1497 priv->cfg->scan_tx_antennas[band]);
1500 priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
1502 rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
1503 scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
1505 /* In power save mode use one chain, otherwise use all chains */
1506 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
1507 /* rx_ant has been set to all valid chains previously */
1508 active_chains = rx_ant &
1509 ((u8)(priv->chain_noise_data.active_chains));
1511 active_chains = rx_ant;
1513 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
1514 priv->chain_noise_data.active_chains);
1516 rx_ant = first_antenna(active_chains);
1518 if (priv->cfg->bt_params &&
1519 priv->cfg->bt_params->advanced_bt_coexist &&
1520 priv->bt_full_concurrent) {
1521 /* operated as 1x1 in full concurrency mode */
1522 rx_ant = first_antenna(rx_ant);
1525 /* MIMO is not used here, but value is required */
1526 rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1527 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1528 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1529 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1530 scan->rx_chain = cpu_to_le16(rx_chain);
1531 if (!priv->is_internal_short_scan) {
1532 cmd_len = iwl_fill_probe_req(priv,
1533 (struct ieee80211_mgmt *)scan->data,
1535 priv->scan_request->ie,
1536 priv->scan_request->ie_len,
1537 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1539 /* use bcast addr, will not be transmitted but must be valid */
1540 cmd_len = iwl_fill_probe_req(priv,
1541 (struct ieee80211_mgmt *)scan->data,
1542 iwl_bcast_addr, NULL, 0,
1543 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1546 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1548 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
1549 RXON_FILTER_BCON_AWARE_MSK);
1551 if (priv->is_internal_short_scan) {
1552 scan->channel_count =
1553 iwl_get_single_channel_for_scan(priv, vif, band,
1554 (void *)&scan->data[le16_to_cpu(
1555 scan->tx_cmd.len)]);
1557 scan->channel_count =
1558 iwl_get_channels_for_scan(priv, vif, band,
1559 is_active, n_probes,
1560 (void *)&scan->data[le16_to_cpu(
1561 scan->tx_cmd.len)]);
1563 if (scan->channel_count == 0) {
1564 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1568 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
1569 scan->channel_count * sizeof(struct iwl_scan_channel);
1571 scan->len = cpu_to_le16(cmd.len);
1573 /* set scan bit here for PAN params */
1574 set_bit(STATUS_SCAN_HW, &priv->status);
1576 if (priv->cfg->ops->hcmd->set_pan_params) {
1577 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
1582 ret = iwl_send_cmd_sync(priv, &cmd);
1584 clear_bit(STATUS_SCAN_HW, &priv->status);
1585 if (priv->cfg->ops->hcmd->set_pan_params)
1586 priv->cfg->ops->hcmd->set_pan_params(priv);
1592 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
1593 struct ieee80211_vif *vif, bool add)
1595 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1598 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
1599 vif->bss_conf.bssid,
1600 &vif_priv->ibss_bssid_sta_id);
1601 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
1602 vif->bss_conf.bssid);
1605 void iwl_free_tfds_in_queue(struct iwl_priv *priv,
1606 int sta_id, int tid, int freed)
1608 lockdep_assert_held(&priv->sta_lock);
1610 if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1611 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1613 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
1614 priv->stations[sta_id].tid[tid].tfds_in_queue,
1616 priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
1620 #define IWL_FLUSH_WAIT_MS 2000
1622 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
1624 struct iwl_tx_queue *txq;
1625 struct iwl_queue *q;
1627 unsigned long now = jiffies;
1630 /* waiting for all the tx frames complete might take a while */
1631 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1632 if (cnt == priv->cmd_queue)
1634 txq = &priv->txq[cnt];
1636 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1637 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1640 if (q->read_ptr != q->write_ptr) {
1641 IWL_ERR(priv, "fail to flush all tx fifo queues\n");
1649 #define IWL_TX_QUEUE_MSK 0xfffff
1652 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
1655 * 1. acquire mutex before calling
1656 * 2. make sure rf is on and not in exit state
1658 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1660 struct iwl_txfifo_flush_cmd flush_cmd;
1661 struct iwl_host_cmd cmd = {
1662 .id = REPLY_TXFIFO_FLUSH,
1663 .len = sizeof(struct iwl_txfifo_flush_cmd),
1670 memset(&flush_cmd, 0, sizeof(flush_cmd));
1671 flush_cmd.fifo_control = IWL_TX_FIFO_VO_MSK | IWL_TX_FIFO_VI_MSK |
1672 IWL_TX_FIFO_BE_MSK | IWL_TX_FIFO_BK_MSK;
1673 if (priv->cfg->sku & IWL_SKU_N)
1674 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
1676 IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
1677 flush_cmd.fifo_control);
1678 flush_cmd.flush_control = cpu_to_le16(flush_control);
1680 return iwl_send_cmd(priv, &cmd);
1683 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1685 mutex_lock(&priv->mutex);
1686 ieee80211_stop_queues(priv->hw);
1687 if (priv->cfg->ops->lib->txfifo_flush(priv, IWL_DROP_ALL)) {
1688 IWL_ERR(priv, "flush request fail\n");
1691 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
1692 iwlagn_wait_tx_queue_empty(priv);
1694 ieee80211_wake_queues(priv->hw);
1695 mutex_unlock(&priv->mutex);
1702 * Macros to access the lookup table.
1704 * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
1705 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
1707 * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
1709 * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
1710 * one after another in 32-bit registers, and "registers" 0 through 7 contain
1711 * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
1713 * These macros encode that format.
1715 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
1716 wifi_txrx, wifi_sh_ant_req) \
1717 (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
1718 (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
1720 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
1721 lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
1722 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1723 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1724 (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
1725 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1727 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1728 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1729 LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
1730 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1732 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
1733 wifi_req, wifi_prio, wifi_txrx, \
1735 LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
1736 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1739 #define LUT_WLAN_KILL_OP(lut, op, val) \
1740 lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
1741 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1742 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1743 (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1744 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
1745 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1746 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1747 LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1748 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1749 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1750 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1751 LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1752 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1754 #define LUT_ANT_SWITCH_OP(lut, op, val) \
1755 lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
1756 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1757 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1758 (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1759 wifi_req, wifi_prio, wifi_txrx, \
1761 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1762 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1763 LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1764 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1765 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1766 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1767 LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1768 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1770 static const __le32 iwlagn_def_3w_lookup[12] = {
1771 cpu_to_le32(0xaaaaaaaa),
1772 cpu_to_le32(0xaaaaaaaa),
1773 cpu_to_le32(0xaeaaaaaa),
1774 cpu_to_le32(0xaaaaaaaa),
1775 cpu_to_le32(0xcc00ff28),
1776 cpu_to_le32(0x0000aaaa),
1777 cpu_to_le32(0xcc00aaaa),
1778 cpu_to_le32(0x0000aaaa),
1779 cpu_to_le32(0xc0004000),
1780 cpu_to_le32(0x00004000),
1781 cpu_to_le32(0xf0005000),
1782 cpu_to_le32(0xf0005000),
1785 static const __le32 iwlagn_concurrent_lookup[12] = {
1786 cpu_to_le32(0xaaaaaaaa),
1787 cpu_to_le32(0xaaaaaaaa),
1788 cpu_to_le32(0xaaaaaaaa),
1789 cpu_to_le32(0xaaaaaaaa),
1790 cpu_to_le32(0xaaaaaaaa),
1791 cpu_to_le32(0xaaaaaaaa),
1792 cpu_to_le32(0xaaaaaaaa),
1793 cpu_to_le32(0xaaaaaaaa),
1794 cpu_to_le32(0x00000000),
1795 cpu_to_le32(0x00000000),
1796 cpu_to_le32(0x00000000),
1797 cpu_to_le32(0x00000000),
1800 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
1802 struct iwlagn_bt_cmd bt_cmd = {
1803 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
1804 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
1805 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
1806 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
1809 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
1810 sizeof(bt_cmd.bt3_lookup_table));
1812 if (priv->cfg->bt_params)
1813 bt_cmd.prio_boost = priv->cfg->bt_params->bt_prio_boost;
1815 bt_cmd.prio_boost = 0;
1816 bt_cmd.kill_ack_mask = priv->kill_ack_mask;
1817 bt_cmd.kill_cts_mask = priv->kill_cts_mask;
1819 bt_cmd.valid = priv->bt_valid;
1820 bt_cmd.tx_prio_boost = 0;
1821 bt_cmd.rx_prio_boost = 0;
1824 * Configure BT coex mode to "no coexistence" when the
1825 * user disabled BT coexistence, we have no interface
1826 * (might be in monitor mode), or the interface is in
1827 * IBSS mode (no proper uCode support for coex then).
1829 if (!bt_coex_active || priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1832 bt_cmd.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
1833 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
1834 if (priv->cfg->bt_params &&
1835 priv->cfg->bt_params->bt_sco_disable)
1836 bt_cmd.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1838 if (priv->bt_ch_announce)
1839 bt_cmd.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
1840 IWL_DEBUG_INFO(priv, "BT coex flag: 0X%x\n", bt_cmd.flags);
1842 if (priv->bt_full_concurrent)
1843 memcpy(bt_cmd.bt3_lookup_table, iwlagn_concurrent_lookup,
1844 sizeof(iwlagn_concurrent_lookup));
1846 memcpy(bt_cmd.bt3_lookup_table, iwlagn_def_3w_lookup,
1847 sizeof(iwlagn_def_3w_lookup));
1849 IWL_DEBUG_INFO(priv, "BT coex %s in %s mode\n",
1850 bt_cmd.flags ? "active" : "disabled",
1851 priv->bt_full_concurrent ?
1852 "full concurrency" : "3-wire");
1854 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(bt_cmd), &bt_cmd))
1855 IWL_ERR(priv, "failed to send BT Coex Config\n");
1858 * When we are doing a restart, need to also reconfigure BT
1859 * SCO to the device. If not doing a restart, bt_sco_active
1860 * will always be false, so there's no need to have an extra
1861 * variable to check for it.
1863 if (priv->bt_sco_active) {
1864 struct iwlagn_bt_sco_cmd sco_cmd = { .flags = 0 };
1866 if (priv->bt_sco_active)
1867 sco_cmd.flags |= IWLAGN_BT_SCO_ACTIVE;
1868 if (iwl_send_cmd_pdu(priv, REPLY_BT_COEX_SCO,
1869 sizeof(sco_cmd), &sco_cmd))
1870 IWL_ERR(priv, "failed to send BT SCO command\n");
1874 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
1876 struct iwl_priv *priv =
1877 container_of(work, struct iwl_priv, bt_traffic_change_work);
1878 struct iwl_rxon_context *ctx;
1879 int smps_request = -1;
1882 * Note: bt_traffic_load can be overridden by scan complete and
1883 * coex profile notifications. Ignore that since only bad consequence
1884 * can be not matching debug print with actual state.
1886 IWL_DEBUG_INFO(priv, "BT traffic load changes: %d\n",
1887 priv->bt_traffic_load);
1889 switch (priv->bt_traffic_load) {
1890 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1891 if (priv->bt_status)
1892 smps_request = IEEE80211_SMPS_DYNAMIC;
1894 smps_request = IEEE80211_SMPS_AUTOMATIC;
1896 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1897 smps_request = IEEE80211_SMPS_DYNAMIC;
1899 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1900 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1901 smps_request = IEEE80211_SMPS_STATIC;
1904 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1905 priv->bt_traffic_load);
1909 mutex_lock(&priv->mutex);
1912 * We can not send command to firmware while scanning. When the scan
1913 * complete we will schedule this work again. We do check with mutex
1914 * locked to prevent new scan request to arrive. We do not check
1915 * STATUS_SCANNING to avoid race when queue_work two times from
1916 * different notifications, but quit and not perform any work at all.
1918 if (test_bit(STATUS_SCAN_HW, &priv->status))
1921 if (priv->cfg->ops->lib->update_chain_flags)
1922 priv->cfg->ops->lib->update_chain_flags(priv);
1924 if (smps_request != -1) {
1925 for_each_context(priv, ctx) {
1926 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1927 ieee80211_request_smps(ctx->vif, smps_request);
1931 mutex_unlock(&priv->mutex);
1934 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1935 struct iwl_bt_uart_msg *uart_msg)
1937 IWL_DEBUG_NOTIF(priv, "Message Type = 0x%X, SSN = 0x%X, "
1938 "Update Req = 0x%X",
1939 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1940 BT_UART_MSG_FRAME1MSGTYPE_POS,
1941 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1942 BT_UART_MSG_FRAME1SSN_POS,
1943 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1944 BT_UART_MSG_FRAME1UPDATEREQ_POS);
1946 IWL_DEBUG_NOTIF(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1947 "Chl_SeqN = 0x%X, In band = 0x%X",
1948 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1949 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1950 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1951 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1952 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1953 BT_UART_MSG_FRAME2CHLSEQN_POS,
1954 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1955 BT_UART_MSG_FRAME2INBAND_POS);
1957 IWL_DEBUG_NOTIF(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1958 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1959 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1960 BT_UART_MSG_FRAME3SCOESCO_POS,
1961 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1962 BT_UART_MSG_FRAME3SNIFF_POS,
1963 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1964 BT_UART_MSG_FRAME3A2DP_POS,
1965 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1966 BT_UART_MSG_FRAME3ACL_POS,
1967 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1968 BT_UART_MSG_FRAME3MASTER_POS,
1969 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1970 BT_UART_MSG_FRAME3OBEX_POS);
1972 IWL_DEBUG_NOTIF(priv, "Idle duration = 0x%X",
1973 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1974 BT_UART_MSG_FRAME4IDLEDURATION_POS);
1976 IWL_DEBUG_NOTIF(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1977 "eSCO Retransmissions = 0x%X",
1978 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1979 BT_UART_MSG_FRAME5TXACTIVITY_POS,
1980 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1981 BT_UART_MSG_FRAME5RXACTIVITY_POS,
1982 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1983 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1985 IWL_DEBUG_NOTIF(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1986 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1987 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1988 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1989 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1991 IWL_DEBUG_NOTIF(priv, "Sniff Activity = 0x%X, Inquiry/Page SR Mode = "
1992 "0x%X, Connectable = 0x%X",
1993 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1994 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1995 (BT_UART_MSG_FRAME7INQUIRYPAGESRMODE_MSK & uart_msg->frame7) >>
1996 BT_UART_MSG_FRAME7INQUIRYPAGESRMODE_POS,
1997 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1998 BT_UART_MSG_FRAME7CONNECTABLE_POS);
2001 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
2002 struct iwl_bt_uart_msg *uart_msg)
2005 static const __le32 bt_kill_ack_msg[2] = {
2006 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
2007 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
2008 static const __le32 bt_kill_cts_msg[2] = {
2009 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
2010 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
2012 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
2014 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
2015 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
2016 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
2017 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
2018 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
2019 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
2021 /* schedule to send runtime bt_config */
2022 queue_work(priv->workqueue, &priv->bt_runtime_config);
2026 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
2027 struct iwl_rx_mem_buffer *rxb)
2029 unsigned long flags;
2030 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2031 struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
2032 struct iwlagn_bt_sco_cmd sco_cmd = { .flags = 0 };
2033 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
2035 IWL_DEBUG_NOTIF(priv, "BT Coex notification:\n");
2036 IWL_DEBUG_NOTIF(priv, " status: %d\n", coex->bt_status);
2037 IWL_DEBUG_NOTIF(priv, " traffic load: %d\n", coex->bt_traffic_load);
2038 IWL_DEBUG_NOTIF(priv, " CI compliance: %d\n",
2039 coex->bt_ci_compliance);
2040 iwlagn_print_uartmsg(priv, uart_msg);
2042 priv->last_bt_traffic_load = priv->bt_traffic_load;
2043 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2044 if (priv->bt_status != coex->bt_status ||
2045 priv->last_bt_traffic_load != coex->bt_traffic_load) {
2046 if (coex->bt_status) {
2048 if (!priv->bt_ch_announce)
2049 priv->bt_traffic_load =
2050 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
2052 priv->bt_traffic_load =
2053 coex->bt_traffic_load;
2056 priv->bt_traffic_load =
2057 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
2059 priv->bt_status = coex->bt_status;
2060 queue_work(priv->workqueue,
2061 &priv->bt_traffic_change_work);
2063 if (priv->bt_sco_active !=
2064 (uart_msg->frame3 & BT_UART_MSG_FRAME3SCOESCO_MSK)) {
2065 priv->bt_sco_active = uart_msg->frame3 &
2066 BT_UART_MSG_FRAME3SCOESCO_MSK;
2067 if (priv->bt_sco_active)
2068 sco_cmd.flags |= IWLAGN_BT_SCO_ACTIVE;
2069 iwl_send_cmd_pdu_async(priv, REPLY_BT_COEX_SCO,
2070 sizeof(sco_cmd), &sco_cmd, NULL);
2074 iwlagn_set_kill_msk(priv, uart_msg);
2076 /* FIXME: based on notification, adjust the prio_boost */
2078 spin_lock_irqsave(&priv->lock, flags);
2079 priv->bt_ci_compliance = coex->bt_ci_compliance;
2080 spin_unlock_irqrestore(&priv->lock, flags);
2083 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
2085 iwlagn_rx_handler_setup(priv);
2086 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
2087 iwlagn_bt_coex_profile_notif;
2090 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
2092 iwlagn_setup_deferred_work(priv);
2094 INIT_WORK(&priv->bt_traffic_change_work,
2095 iwlagn_bt_traffic_change_work);
2098 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
2100 cancel_work_sync(&priv->bt_traffic_change_work);
2103 static bool is_single_rx_stream(struct iwl_priv *priv)
2105 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
2106 priv->current_ht_config.single_chain_sufficient;
2109 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
2110 #define IWL_NUM_RX_CHAINS_SINGLE 2
2111 #define IWL_NUM_IDLE_CHAINS_DUAL 2
2112 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
2115 * Determine how many receiver/antenna chains to use.
2117 * More provides better reception via diversity. Fewer saves power
2118 * at the expense of throughput, but only when not in powersave to
2121 * MIMO (dual stream) requires at least 2, but works better with 3.
2122 * This does not determine *which* chains to use, just how many.
2124 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
2126 if (priv->cfg->bt_params &&
2127 priv->cfg->bt_params->advanced_bt_coexist &&
2128 (priv->bt_full_concurrent ||
2129 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
2131 * only use chain 'A' in bt high traffic load or
2132 * full concurrency mode
2134 return IWL_NUM_RX_CHAINS_SINGLE;
2136 /* # of Rx chains to use when expecting MIMO. */
2137 if (is_single_rx_stream(priv))
2138 return IWL_NUM_RX_CHAINS_SINGLE;
2140 return IWL_NUM_RX_CHAINS_MULTIPLE;
2144 * When we are in power saving mode, unless device support spatial
2145 * multiplexing power save, use the active count for rx chain count.
2147 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
2149 /* # Rx chains when idling, depending on SMPS mode */
2150 switch (priv->current_ht_config.smps) {
2151 case IEEE80211_SMPS_STATIC:
2152 case IEEE80211_SMPS_DYNAMIC:
2153 return IWL_NUM_IDLE_CHAINS_SINGLE;
2154 case IEEE80211_SMPS_OFF:
2157 WARN(1, "invalid SMPS mode %d",
2158 priv->current_ht_config.smps);
2163 /* up to 4 chains */
2164 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
2167 res = (chain_bitmap & BIT(0)) >> 0;
2168 res += (chain_bitmap & BIT(1)) >> 1;
2169 res += (chain_bitmap & BIT(2)) >> 2;
2170 res += (chain_bitmap & BIT(3)) >> 3;
2175 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2177 * Selects how many and which Rx receivers/antennas/chains to use.
2178 * This should not be used for scan command ... it puts data in wrong place.
2180 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2182 bool is_single = is_single_rx_stream(priv);
2183 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
2184 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
2188 /* Tell uCode which antennas are actually connected.
2189 * Before first association, we assume all antennas are connected.
2190 * Just after first association, iwl_chain_noise_calibration()
2191 * checks which antennas actually *are* connected. */
2192 if (priv->chain_noise_data.active_chains)
2193 active_chains = priv->chain_noise_data.active_chains;
2195 active_chains = priv->hw_params.valid_rx_ant;
2197 if (priv->cfg->bt_params &&
2198 priv->cfg->bt_params->advanced_bt_coexist &&
2199 (priv->bt_full_concurrent ||
2200 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
2202 * only use chain 'A' in bt high traffic load or
2203 * full concurrency mode
2205 active_chains = first_antenna(active_chains);
2208 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
2210 /* How many receivers should we use? */
2211 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
2212 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
2215 /* correct rx chain count according hw settings
2216 * and chain noise calibration
2218 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
2219 if (valid_rx_cnt < active_rx_cnt)
2220 active_rx_cnt = valid_rx_cnt;
2222 if (valid_rx_cnt < idle_rx_cnt)
2223 idle_rx_cnt = valid_rx_cnt;
2225 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
2226 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
2228 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
2230 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
2231 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2233 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2235 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
2236 ctx->staging.rx_chain,
2237 active_rx_cnt, idle_rx_cnt);
2239 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
2240 active_rx_cnt < idle_rx_cnt);
2243 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
2248 if (priv->band == IEEE80211_BAND_2GHZ &&
2249 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
2252 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
2253 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
2254 if (valid & BIT(ind))
2260 static const char *get_csr_string(int cmd)
2263 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2264 IWL_CMD(CSR_INT_COALESCING);
2266 IWL_CMD(CSR_INT_MASK);
2267 IWL_CMD(CSR_FH_INT_STATUS);
2268 IWL_CMD(CSR_GPIO_IN);
2270 IWL_CMD(CSR_GP_CNTRL);
2271 IWL_CMD(CSR_HW_REV);
2272 IWL_CMD(CSR_EEPROM_REG);
2273 IWL_CMD(CSR_EEPROM_GP);
2274 IWL_CMD(CSR_OTP_GP_REG);
2275 IWL_CMD(CSR_GIO_REG);
2276 IWL_CMD(CSR_GP_UCODE_REG);
2277 IWL_CMD(CSR_GP_DRIVER_REG);
2278 IWL_CMD(CSR_UCODE_DRV_GP1);
2279 IWL_CMD(CSR_UCODE_DRV_GP2);
2280 IWL_CMD(CSR_LED_REG);
2281 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2282 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2283 IWL_CMD(CSR_ANA_PLL_CFG);
2284 IWL_CMD(CSR_HW_REV_WA_REG);
2285 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2291 void iwl_dump_csr(struct iwl_priv *priv)
2294 static const u32 csr_tbl[] = {
2295 CSR_HW_IF_CONFIG_REG,
2313 CSR_DRAM_INT_TBL_REG,
2314 CSR_GIO_CHICKEN_BITS,
2317 CSR_DBG_HPET_MEM_REG
2319 IWL_ERR(priv, "CSR values:\n");
2320 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2321 "CSR_INT_PERIODIC_REG)\n");
2322 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2323 IWL_ERR(priv, " %25s: 0X%08x\n",
2324 get_csr_string(csr_tbl[i]),
2325 iwl_read32(priv, csr_tbl[i]));
2329 static const char *get_fh_string(int cmd)
2332 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2333 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2334 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2335 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2336 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2337 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2338 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2339 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2340 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2346 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2349 #ifdef CONFIG_IWLWIFI_DEBUG
2353 static const u32 fh_tbl[] = {
2354 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2355 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2356 FH_RSCSR_CHNL0_WPTR,
2357 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2358 FH_MEM_RSSR_SHARED_CTRL_REG,
2359 FH_MEM_RSSR_RX_STATUS_REG,
2360 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2361 FH_TSSR_TX_STATUS_REG,
2362 FH_TSSR_TX_ERROR_REG
2364 #ifdef CONFIG_IWLWIFI_DEBUG
2366 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2367 *buf = kmalloc(bufsz, GFP_KERNEL);
2370 pos += scnprintf(*buf + pos, bufsz - pos,
2371 "FH register values:\n");
2372 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2373 pos += scnprintf(*buf + pos, bufsz - pos,
2375 get_fh_string(fh_tbl[i]),
2376 iwl_read_direct32(priv, fh_tbl[i]));
2381 IWL_ERR(priv, "FH register values:\n");
2382 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2383 IWL_ERR(priv, " %34s: 0X%08x\n",
2384 get_fh_string(fh_tbl[i]),
2385 iwl_read_direct32(priv, fh_tbl[i]));