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iwlagn: move tx queues to transport layer
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34 #include <linux/ieee80211.h>
35
36 #include "iwl-dev.h"
37 #include "iwl-core.h"
38 #include "iwl-sta.h"
39 #include "iwl-io.h"
40 #include "iwl-helpers.h"
41 #include "iwl-agn-hw.h"
42 #include "iwl-agn.h"
43 #include "iwl-trans.h"
44
45 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
46 struct ieee80211_tx_info *info,
47 __le16 fc, __le32 *tx_flags)
48 {
49 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
50 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
51 info->flags & IEEE80211_TX_CTL_AMPDU)
52 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
53 }
54
55 /*
56 * handle build REPLY_TX command notification.
57 */
58 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
59 struct sk_buff *skb,
60 struct iwl_tx_cmd *tx_cmd,
61 struct ieee80211_tx_info *info,
62 struct ieee80211_hdr *hdr, u8 sta_id)
63 {
64 __le16 fc = hdr->frame_control;
65 __le32 tx_flags = tx_cmd->tx_flags;
66
67 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
68
69 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
70 tx_flags |= TX_CMD_FLG_ACK_MSK;
71 else
72 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
73
74 if (ieee80211_is_probe_resp(fc))
75 tx_flags |= TX_CMD_FLG_TSF_MSK;
76 else if (ieee80211_is_back_req(fc))
77 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
78 else if (info->band == IEEE80211_BAND_2GHZ &&
79 priv->cfg->bt_params &&
80 priv->cfg->bt_params->advanced_bt_coexist &&
81 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
82 ieee80211_is_reassoc_req(fc) ||
83 skb->protocol == cpu_to_be16(ETH_P_PAE)))
84 tx_flags |= TX_CMD_FLG_IGNORE_BT;
85
86
87 tx_cmd->sta_id = sta_id;
88 if (ieee80211_has_morefrags(fc))
89 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
90
91 if (ieee80211_is_data_qos(fc)) {
92 u8 *qc = ieee80211_get_qos_ctl(hdr);
93 tx_cmd->tid_tspec = qc[0] & 0xf;
94 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
95 } else {
96 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
97 }
98
99 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
100
101 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
102 if (ieee80211_is_mgmt(fc)) {
103 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
104 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
105 else
106 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
107 } else {
108 tx_cmd->timeout.pm_frame_timeout = 0;
109 }
110
111 tx_cmd->driver_txop = 0;
112 tx_cmd->tx_flags = tx_flags;
113 tx_cmd->next_frame_len = 0;
114 }
115
116 #define RTS_DFAULT_RETRY_LIMIT 60
117
118 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
119 struct iwl_tx_cmd *tx_cmd,
120 struct ieee80211_tx_info *info,
121 __le16 fc)
122 {
123 u32 rate_flags;
124 int rate_idx;
125 u8 rts_retry_limit;
126 u8 data_retry_limit;
127 u8 rate_plcp;
128
129 /* Set retry limit on DATA packets and Probe Responses*/
130 if (ieee80211_is_probe_resp(fc))
131 data_retry_limit = 3;
132 else
133 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
134 tx_cmd->data_retry_limit = data_retry_limit;
135
136 /* Set retry limit on RTS packets */
137 rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
138 if (data_retry_limit < rts_retry_limit)
139 rts_retry_limit = data_retry_limit;
140 tx_cmd->rts_retry_limit = rts_retry_limit;
141
142 /* DATA packets will use the uCode station table for rate/antenna
143 * selection */
144 if (ieee80211_is_data(fc)) {
145 tx_cmd->initial_rate_index = 0;
146 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
147 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
148 if (priv->tm_fixed_rate) {
149 /*
150 * rate overwrite by testmode
151 * we not only send lq command to change rate
152 * we also re-enforce per data pkt base.
153 */
154 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
155 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
156 sizeof(tx_cmd->rate_n_flags));
157 }
158 #endif
159 return;
160 }
161
162 /**
163 * If the current TX rate stored in mac80211 has the MCS bit set, it's
164 * not really a TX rate. Thus, we use the lowest supported rate for
165 * this band. Also use the lowest supported rate if the stored rate
166 * index is invalid.
167 */
168 rate_idx = info->control.rates[0].idx;
169 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
170 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
171 rate_idx = rate_lowest_index(&priv->bands[info->band],
172 info->control.sta);
173 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
174 if (info->band == IEEE80211_BAND_5GHZ)
175 rate_idx += IWL_FIRST_OFDM_RATE;
176 /* Get PLCP rate for tx_cmd->rate_n_flags */
177 rate_plcp = iwl_rates[rate_idx].plcp;
178 /* Zero out flags for this packet */
179 rate_flags = 0;
180
181 /* Set CCK flag as needed */
182 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
183 rate_flags |= RATE_MCS_CCK_MSK;
184
185 /* Set up antennas */
186 if (priv->cfg->bt_params &&
187 priv->cfg->bt_params->advanced_bt_coexist &&
188 priv->bt_full_concurrent) {
189 /* operated as 1x1 in full concurrency mode */
190 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
191 first_antenna(hw_params(priv).valid_tx_ant));
192 } else
193 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
194 hw_params(priv).valid_tx_ant);
195 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
196
197 /* Set the rate in the TX cmd */
198 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
199 }
200
201 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
202 struct ieee80211_tx_info *info,
203 struct iwl_tx_cmd *tx_cmd,
204 struct sk_buff *skb_frag,
205 int sta_id)
206 {
207 struct ieee80211_key_conf *keyconf = info->control.hw_key;
208
209 switch (keyconf->cipher) {
210 case WLAN_CIPHER_SUITE_CCMP:
211 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
212 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
213 if (info->flags & IEEE80211_TX_CTL_AMPDU)
214 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
215 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
216 break;
217
218 case WLAN_CIPHER_SUITE_TKIP:
219 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
220 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
221 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
222 break;
223
224 case WLAN_CIPHER_SUITE_WEP104:
225 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
226 /* fall through */
227 case WLAN_CIPHER_SUITE_WEP40:
228 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
229 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
230
231 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
232
233 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
234 "with key %d\n", keyconf->keyidx);
235 break;
236
237 default:
238 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
239 break;
240 }
241 }
242
243 /*
244 * start REPLY_TX command process
245 */
246 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
247 {
248 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
249 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
250 struct iwl_station_priv *sta_priv = NULL;
251 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
252 struct iwl_device_cmd *dev_cmd = NULL;
253 struct iwl_tx_cmd *tx_cmd;
254
255 __le16 fc;
256 u8 hdr_len;
257 u16 len;
258 u8 sta_id;
259 unsigned long flags;
260 bool is_agg = false;
261
262 if (info->control.vif)
263 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
264
265 spin_lock_irqsave(&priv->shrd->lock, flags);
266 if (iwl_is_rfkill(priv->shrd)) {
267 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
268 goto drop_unlock_priv;
269 }
270
271 fc = hdr->frame_control;
272
273 #ifdef CONFIG_IWLWIFI_DEBUG
274 if (ieee80211_is_auth(fc))
275 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
276 else if (ieee80211_is_assoc_req(fc))
277 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
278 else if (ieee80211_is_reassoc_req(fc))
279 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
280 #endif
281
282 hdr_len = ieee80211_hdrlen(fc);
283
284 /* For management frames use broadcast id to do not break aggregation */
285 if (!ieee80211_is_data(fc))
286 sta_id = ctx->bcast_sta_id;
287 else {
288 /* Find index into station table for destination station */
289 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
290 if (sta_id == IWL_INVALID_STATION) {
291 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
292 hdr->addr1);
293 goto drop_unlock_priv;
294 }
295 }
296
297 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
298
299 if (info->control.sta)
300 sta_priv = (void *)info->control.sta->drv_priv;
301
302 if (sta_priv && sta_priv->asleep &&
303 (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) {
304 /*
305 * This sends an asynchronous command to the device,
306 * but we can rely on it being processed before the
307 * next frame is processed -- and the next frame to
308 * this station is the one that will consume this
309 * counter.
310 * For now set the counter to just 1 since we do not
311 * support uAPSD yet.
312 */
313 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
314 }
315
316 /* irqs already disabled/saved above when locking priv->shrd->lock */
317 spin_lock(&priv->shrd->sta_lock);
318
319 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
320
321 if (unlikely(!dev_cmd))
322 goto drop_unlock_sta;
323
324 memset(dev_cmd, 0, sizeof(*dev_cmd));
325 tx_cmd = &dev_cmd->cmd.tx;
326
327 /* Copy MAC header from skb into command buffer */
328 memcpy(tx_cmd->hdr, hdr, hdr_len);
329
330 /* Total # bytes to be transmitted */
331 len = (u16)skb->len;
332 tx_cmd->len = cpu_to_le16(len);
333
334 if (info->control.hw_key)
335 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
336
337 /* TODO need this for burst mode later on */
338 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
339 iwl_dbg_log_tx_data_frame(priv, len, hdr);
340
341 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
342
343 iwl_update_stats(priv, true, fc, len);
344
345 info->driver_data[0] = ctx;
346 info->driver_data[1] = dev_cmd;
347
348 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
349 goto drop_unlock_sta;
350
351 spin_unlock(&priv->shrd->sta_lock);
352 spin_unlock_irqrestore(&priv->shrd->lock, flags);
353
354 /*
355 * Avoid atomic ops if it isn't an associated client.
356 * Also, if this is a packet for aggregation, don't
357 * increase the counter because the ucode will stop
358 * aggregation queues when their respective station
359 * goes to sleep.
360 */
361 if (sta_priv && sta_priv->client && !is_agg)
362 atomic_inc(&sta_priv->pending_frames);
363
364 return 0;
365
366 drop_unlock_sta:
367 if (dev_cmd)
368 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
369 spin_unlock(&priv->shrd->sta_lock);
370 drop_unlock_priv:
371 spin_unlock_irqrestore(&priv->shrd->lock, flags);
372 return -1;
373 }
374
375 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
376 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
377 {
378 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
379 int sta_id;
380 int ret;
381
382 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
383 sta->addr, tid);
384
385 sta_id = iwl_sta_id(sta);
386 if (sta_id == IWL_INVALID_STATION) {
387 IWL_ERR(priv, "Start AGG on invalid station\n");
388 return -ENXIO;
389 }
390 if (unlikely(tid >= IWL_MAX_TID_COUNT))
391 return -EINVAL;
392
393 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
394 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
395 return -ENXIO;
396 }
397
398 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
399 if (ret)
400 return ret;
401
402 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
403 tid, ssn);
404
405 return ret;
406 }
407
408 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
409 struct ieee80211_sta *sta, u16 tid)
410 {
411 int sta_id;
412 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
413
414 sta_id = iwl_sta_id(sta);
415
416 if (sta_id == IWL_INVALID_STATION) {
417 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
418 return -ENXIO;
419 }
420
421 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
422 sta_id, tid);
423 }
424
425 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
426 struct iwl_rxon_context *ctx,
427 const u8 *addr1)
428 {
429 struct ieee80211_sta *sta;
430 struct iwl_station_priv *sta_priv;
431
432 rcu_read_lock();
433 sta = ieee80211_find_sta(ctx->vif, addr1);
434 if (sta) {
435 sta_priv = (void *)sta->drv_priv;
436 /* avoid atomic ops if this isn't a client */
437 if (sta_priv->client &&
438 atomic_dec_return(&sta_priv->pending_frames) == 0)
439 ieee80211_sta_block_awake(priv->hw, sta, false);
440 }
441 rcu_read_unlock();
442 }
443
444 /**
445 * translate ucode response to mac80211 tx status control values
446 */
447 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
448 struct ieee80211_tx_info *info)
449 {
450 struct ieee80211_tx_rate *r = &info->control.rates[0];
451
452 info->antenna_sel_tx =
453 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
454 if (rate_n_flags & RATE_MCS_HT_MSK)
455 r->flags |= IEEE80211_TX_RC_MCS;
456 if (rate_n_flags & RATE_MCS_GF_MSK)
457 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
458 if (rate_n_flags & RATE_MCS_HT40_MSK)
459 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
460 if (rate_n_flags & RATE_MCS_DUP_MSK)
461 r->flags |= IEEE80211_TX_RC_DUP_DATA;
462 if (rate_n_flags & RATE_MCS_SGI_MSK)
463 r->flags |= IEEE80211_TX_RC_SHORT_GI;
464 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
465 }
466
467 #ifdef CONFIG_IWLWIFI_DEBUG
468 const char *iwl_get_tx_fail_reason(u32 status)
469 {
470 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
471 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
472
473 switch (status & TX_STATUS_MSK) {
474 case TX_STATUS_SUCCESS:
475 return "SUCCESS";
476 TX_STATUS_POSTPONE(DELAY);
477 TX_STATUS_POSTPONE(FEW_BYTES);
478 TX_STATUS_POSTPONE(BT_PRIO);
479 TX_STATUS_POSTPONE(QUIET_PERIOD);
480 TX_STATUS_POSTPONE(CALC_TTAK);
481 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
482 TX_STATUS_FAIL(SHORT_LIMIT);
483 TX_STATUS_FAIL(LONG_LIMIT);
484 TX_STATUS_FAIL(FIFO_UNDERRUN);
485 TX_STATUS_FAIL(DRAIN_FLOW);
486 TX_STATUS_FAIL(RFKILL_FLUSH);
487 TX_STATUS_FAIL(LIFE_EXPIRE);
488 TX_STATUS_FAIL(DEST_PS);
489 TX_STATUS_FAIL(HOST_ABORTED);
490 TX_STATUS_FAIL(BT_RETRY);
491 TX_STATUS_FAIL(STA_INVALID);
492 TX_STATUS_FAIL(FRAG_DROPPED);
493 TX_STATUS_FAIL(TID_DISABLE);
494 TX_STATUS_FAIL(FIFO_FLUSHED);
495 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
496 TX_STATUS_FAIL(PASSIVE_NO_RX);
497 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
498 }
499
500 return "UNKNOWN";
501
502 #undef TX_STATUS_FAIL
503 #undef TX_STATUS_POSTPONE
504 }
505 #endif /* CONFIG_IWLWIFI_DEBUG */
506
507 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
508 {
509 status &= AGG_TX_STATUS_MSK;
510
511 switch (status) {
512 case AGG_TX_STATE_UNDERRUN_MSK:
513 priv->reply_agg_tx_stats.underrun++;
514 break;
515 case AGG_TX_STATE_BT_PRIO_MSK:
516 priv->reply_agg_tx_stats.bt_prio++;
517 break;
518 case AGG_TX_STATE_FEW_BYTES_MSK:
519 priv->reply_agg_tx_stats.few_bytes++;
520 break;
521 case AGG_TX_STATE_ABORT_MSK:
522 priv->reply_agg_tx_stats.abort++;
523 break;
524 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
525 priv->reply_agg_tx_stats.last_sent_ttl++;
526 break;
527 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
528 priv->reply_agg_tx_stats.last_sent_try++;
529 break;
530 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
531 priv->reply_agg_tx_stats.last_sent_bt_kill++;
532 break;
533 case AGG_TX_STATE_SCD_QUERY_MSK:
534 priv->reply_agg_tx_stats.scd_query++;
535 break;
536 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
537 priv->reply_agg_tx_stats.bad_crc32++;
538 break;
539 case AGG_TX_STATE_RESPONSE_MSK:
540 priv->reply_agg_tx_stats.response++;
541 break;
542 case AGG_TX_STATE_DUMP_TX_MSK:
543 priv->reply_agg_tx_stats.dump_tx++;
544 break;
545 case AGG_TX_STATE_DELAY_TX_MSK:
546 priv->reply_agg_tx_stats.delay_tx++;
547 break;
548 default:
549 priv->reply_agg_tx_stats.unknown++;
550 break;
551 }
552 }
553
554 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
555 struct iwlagn_tx_resp *tx_resp)
556 {
557 struct agg_tx_status *frame_status = &tx_resp->status;
558 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
559 IWLAGN_TX_RES_TID_POS;
560 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
561 IWLAGN_TX_RES_RA_POS;
562 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
563 u32 status = le16_to_cpu(tx_resp->status.status);
564 int i;
565
566 if (agg->wait_for_ba)
567 IWL_DEBUG_TX_REPLY(priv,
568 "got tx response w/o block-ack\n");
569
570 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
571 agg->wait_for_ba = (tx_resp->frame_count > 1);
572
573 /*
574 * If the BT kill count is non-zero, we'll get this
575 * notification again.
576 */
577 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
578 priv->cfg->bt_params &&
579 priv->cfg->bt_params->advanced_bt_coexist) {
580 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
581 }
582
583 /* Construct bit-map of pending frames within Tx window */
584 for (i = 0; i < tx_resp->frame_count; i++) {
585 u16 fstatus = le16_to_cpu(frame_status[i].status);
586
587 if (status & AGG_TX_STATUS_MSK)
588 iwlagn_count_agg_tx_err_status(priv, fstatus);
589
590 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
591 AGG_TX_STATE_ABORT_MSK))
592 continue;
593
594 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
595 "try-count (0x%08x)\n",
596 iwl_get_agg_tx_fail_reason(fstatus),
597 fstatus & AGG_TX_STATUS_MSK,
598 fstatus & AGG_TX_TRY_MSK);
599 }
600 }
601
602 #ifdef CONFIG_IWLWIFI_DEBUG
603 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
604
605 const char *iwl_get_agg_tx_fail_reason(u16 status)
606 {
607 status &= AGG_TX_STATUS_MSK;
608 switch (status) {
609 case AGG_TX_STATE_TRANSMITTED:
610 return "SUCCESS";
611 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
612 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
613 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
614 AGG_TX_STATE_FAIL(ABORT_MSK);
615 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
616 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
617 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
618 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
619 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
620 AGG_TX_STATE_FAIL(RESPONSE_MSK);
621 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
622 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
623 }
624
625 return "UNKNOWN";
626 }
627 #endif /* CONFIG_IWLWIFI_DEBUG */
628
629 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
630 {
631 return le32_to_cpup((__le32 *)&tx_resp->status +
632 tx_resp->frame_count) & MAX_SN;
633 }
634
635 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
636 {
637 status &= TX_STATUS_MSK;
638
639 switch (status) {
640 case TX_STATUS_POSTPONE_DELAY:
641 priv->reply_tx_stats.pp_delay++;
642 break;
643 case TX_STATUS_POSTPONE_FEW_BYTES:
644 priv->reply_tx_stats.pp_few_bytes++;
645 break;
646 case TX_STATUS_POSTPONE_BT_PRIO:
647 priv->reply_tx_stats.pp_bt_prio++;
648 break;
649 case TX_STATUS_POSTPONE_QUIET_PERIOD:
650 priv->reply_tx_stats.pp_quiet_period++;
651 break;
652 case TX_STATUS_POSTPONE_CALC_TTAK:
653 priv->reply_tx_stats.pp_calc_ttak++;
654 break;
655 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
656 priv->reply_tx_stats.int_crossed_retry++;
657 break;
658 case TX_STATUS_FAIL_SHORT_LIMIT:
659 priv->reply_tx_stats.short_limit++;
660 break;
661 case TX_STATUS_FAIL_LONG_LIMIT:
662 priv->reply_tx_stats.long_limit++;
663 break;
664 case TX_STATUS_FAIL_FIFO_UNDERRUN:
665 priv->reply_tx_stats.fifo_underrun++;
666 break;
667 case TX_STATUS_FAIL_DRAIN_FLOW:
668 priv->reply_tx_stats.drain_flow++;
669 break;
670 case TX_STATUS_FAIL_RFKILL_FLUSH:
671 priv->reply_tx_stats.rfkill_flush++;
672 break;
673 case TX_STATUS_FAIL_LIFE_EXPIRE:
674 priv->reply_tx_stats.life_expire++;
675 break;
676 case TX_STATUS_FAIL_DEST_PS:
677 priv->reply_tx_stats.dest_ps++;
678 break;
679 case TX_STATUS_FAIL_HOST_ABORTED:
680 priv->reply_tx_stats.host_abort++;
681 break;
682 case TX_STATUS_FAIL_BT_RETRY:
683 priv->reply_tx_stats.bt_retry++;
684 break;
685 case TX_STATUS_FAIL_STA_INVALID:
686 priv->reply_tx_stats.sta_invalid++;
687 break;
688 case TX_STATUS_FAIL_FRAG_DROPPED:
689 priv->reply_tx_stats.frag_drop++;
690 break;
691 case TX_STATUS_FAIL_TID_DISABLE:
692 priv->reply_tx_stats.tid_disable++;
693 break;
694 case TX_STATUS_FAIL_FIFO_FLUSHED:
695 priv->reply_tx_stats.fifo_flush++;
696 break;
697 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
698 priv->reply_tx_stats.insuff_cf_poll++;
699 break;
700 case TX_STATUS_FAIL_PASSIVE_NO_RX:
701 priv->reply_tx_stats.fail_hw_drop++;
702 break;
703 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
704 priv->reply_tx_stats.sta_color_mismatch++;
705 break;
706 default:
707 priv->reply_tx_stats.unknown++;
708 break;
709 }
710 }
711
712 static void iwlagn_set_tx_status(struct iwl_priv *priv,
713 struct ieee80211_tx_info *info,
714 struct iwlagn_tx_resp *tx_resp,
715 bool is_agg)
716 {
717 u16 status = le16_to_cpu(tx_resp->status.status);
718
719 info->status.rates[0].count = tx_resp->failure_frame + 1;
720 if (is_agg)
721 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
722 info->flags |= iwl_tx_status_to_mac80211(status);
723 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
724 info);
725 if (!iwl_is_tx_success(status))
726 iwlagn_count_tx_err_status(priv, status);
727 }
728
729 static void iwl_check_abort_status(struct iwl_priv *priv,
730 u8 frame_count, u32 status)
731 {
732 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
733 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
734 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
735 queue_work(priv->shrd->workqueue, &priv->tx_flush);
736 }
737 }
738
739 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
740 {
741 struct iwl_rx_packet *pkt = rxb_addr(rxb);
742 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
743 int txq_id = SEQ_TO_QUEUE(sequence);
744 int cmd_index = SEQ_TO_INDEX(sequence);
745 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
746 struct ieee80211_hdr *hdr;
747 u32 status = le16_to_cpu(tx_resp->status.status);
748 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
749 int tid;
750 int sta_id;
751 int freed;
752 struct ieee80211_tx_info *info;
753 unsigned long flags;
754 struct sk_buff_head skbs;
755 struct sk_buff *skb;
756 struct iwl_rxon_context *ctx;
757 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
758
759 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
760 IWLAGN_TX_RES_TID_POS;
761 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
762 IWLAGN_TX_RES_RA_POS;
763
764 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
765
766 if (is_agg)
767 iwl_rx_reply_tx_agg(priv, tx_resp);
768
769 if (tx_resp->frame_count == 1) {
770 __skb_queue_head_init(&skbs);
771 /*we can free until ssn % q.n_bd not inclusive */
772 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
773 ssn, status, &skbs);
774 freed = 0;
775 while (!skb_queue_empty(&skbs)) {
776 skb = __skb_dequeue(&skbs);
777 hdr = (struct ieee80211_hdr *)skb->data;
778
779 if (!ieee80211_is_data_qos(hdr->frame_control))
780 priv->last_seq_ctl = tx_resp->seq_ctl;
781
782 info = IEEE80211_SKB_CB(skb);
783 ctx = info->driver_data[0];
784 kmem_cache_free(priv->tx_cmd_pool,
785 (info->driver_data[1]));
786
787 memset(&info->status, 0, sizeof(info->status));
788
789 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
790 iwl_is_associated_ctx(ctx) && ctx->vif &&
791 ctx->vif->type == NL80211_IFTYPE_STATION) {
792 ctx->last_tx_rejected = true;
793 iwl_trans_stop_queue(trans(priv), txq_id);
794
795 IWL_DEBUG_TX_REPLY(priv,
796 "TXQ %d status %s (0x%08x) "
797 "rate_n_flags 0x%x retries %d\n",
798 txq_id,
799 iwl_get_tx_fail_reason(status),
800 status,
801 le32_to_cpu(tx_resp->rate_n_flags),
802 tx_resp->failure_frame);
803
804 IWL_DEBUG_TX_REPLY(priv,
805 "FrameCnt = %d, idx=%d\n",
806 tx_resp->frame_count, cmd_index);
807 }
808
809 /* check if BAR is needed */
810 if (is_agg && !iwl_is_tx_success(status))
811 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
812 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
813 tx_resp, is_agg);
814 if (!is_agg)
815 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
816
817 ieee80211_tx_status_irqsafe(priv->hw, skb);
818
819 freed++;
820 }
821
822 WARN_ON(!is_agg && freed != 1);
823 }
824
825 iwl_check_abort_status(priv, tx_resp->frame_count, status);
826 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
827 }
828
829 /**
830 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
831 *
832 * Handles block-acknowledge notification from device, which reports success
833 * of frames sent via aggregation.
834 */
835 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
836 struct iwl_rx_mem_buffer *rxb)
837 {
838 struct iwl_rx_packet *pkt = rxb_addr(rxb);
839 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
840 struct iwl_ht_agg *agg;
841 struct sk_buff_head reclaimed_skbs;
842 struct ieee80211_tx_info *info;
843 struct ieee80211_hdr *hdr;
844 struct sk_buff *skb;
845 unsigned long flags;
846 int sta_id;
847 int tid;
848 int freed;
849
850 /* "flow" corresponds to Tx queue */
851 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
852
853 /* "ssn" is start of block-ack Tx window, corresponds to index
854 * (in Tx queue's circular buffer) of first TFD/frame in window */
855 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
856
857 if (scd_flow >= hw_params(priv).max_txq_num) {
858 IWL_ERR(priv,
859 "BUG_ON scd_flow is bigger than number of queues\n");
860 return;
861 }
862
863 sta_id = ba_resp->sta_id;
864 tid = ba_resp->tid;
865 agg = &priv->shrd->tid_data[sta_id][tid].agg;
866
867 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
868
869 if (unlikely(agg->txq_id != scd_flow)) {
870 /*
871 * FIXME: this is a uCode bug which need to be addressed,
872 * log the information and return for now!
873 * since it is possible happen very often and in order
874 * not to fill the syslog, don't enable the logging by default
875 */
876 IWL_DEBUG_TX_REPLY(priv,
877 "BA scd_flow %d does not match txq_id %d\n",
878 scd_flow, agg->txq_id);
879 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
880 return;
881 }
882
883 if (unlikely(!agg->wait_for_ba)) {
884 if (unlikely(ba_resp->bitmap))
885 IWL_ERR(priv, "Received BA when not expected\n");
886 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
887 return;
888 }
889
890 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
891 "sta_id = %d\n",
892 agg->wait_for_ba,
893 (u8 *) &ba_resp->sta_addr_lo32,
894 ba_resp->sta_id);
895 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
896 "scd_flow = %d, scd_ssn = %d\n",
897 ba_resp->tid,
898 ba_resp->seq_ctl,
899 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
900 ba_resp->scd_flow,
901 ba_resp->scd_ssn);
902
903 /* Mark that the expected block-ack response arrived */
904 agg->wait_for_ba = 0;
905
906 /* Sanity check values reported by uCode */
907 if (ba_resp->txed_2_done > ba_resp->txed) {
908 IWL_DEBUG_TX_REPLY(priv,
909 "bogus sent(%d) and ack(%d) count\n",
910 ba_resp->txed, ba_resp->txed_2_done);
911 /*
912 * set txed_2_done = txed,
913 * so it won't impact rate scale
914 */
915 ba_resp->txed = ba_resp->txed_2_done;
916 }
917 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
918 ba_resp->txed, ba_resp->txed_2_done);
919
920 __skb_queue_head_init(&reclaimed_skbs);
921
922 /* Release all TFDs before the SSN, i.e. all TFDs in front of
923 * block-ack window (we assume that they've been successfully
924 * transmitted ... if not, it's too late anyway). */
925 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
926 0, &reclaimed_skbs);
927 freed = 0;
928 while (!skb_queue_empty(&reclaimed_skbs)) {
929
930 skb = __skb_dequeue(&reclaimed_skbs);
931 hdr = (struct ieee80211_hdr *)skb->data;
932
933 if (ieee80211_is_data_qos(hdr->frame_control))
934 freed++;
935 else
936 WARN_ON_ONCE(1);
937
938 if (freed == 0) {
939 /* this is the first skb we deliver in this batch */
940 /* put the rate scaling data there */
941 info = IEEE80211_SKB_CB(skb);
942 memset(&info->status, 0, sizeof(info->status));
943 info->flags |= IEEE80211_TX_STAT_ACK;
944 info->flags |= IEEE80211_TX_STAT_AMPDU;
945 info->status.ampdu_ack_len = ba_resp->txed_2_done;
946 info->status.ampdu_len = ba_resp->txed;
947 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
948 info);
949 }
950
951 info = IEEE80211_SKB_CB(skb);
952 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
953
954 ieee80211_tx_status_irqsafe(priv->hw, skb);
955 }
956
957 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
958 }
Linux kernel - Deliverables
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