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mac80211: implement uAPSD
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
blobdcb3bd67d4f993f0a80dac0ba2ddc5f55dc4b5f2
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_POLL_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 if (info->flags & IEEE80211_TX_CTL_AMPDU)
317 is_agg = true;
318
319 /* irqs already disabled/saved above when locking priv->shrd->lock */
320 spin_lock(&priv->shrd->sta_lock);
321
322 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
323
324 if (unlikely(!dev_cmd))
325 goto drop_unlock_sta;
326
327 memset(dev_cmd, 0, sizeof(*dev_cmd));
328 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
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 memset(&info->status, 0, sizeof(info->status));
346
347 info->driver_data[0] = ctx;
348 info->driver_data[1] = dev_cmd;
349
350 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
351 goto drop_unlock_sta;
352
353 spin_unlock(&priv->shrd->sta_lock);
354 spin_unlock_irqrestore(&priv->shrd->lock, flags);
355
356 /*
357 * Avoid atomic ops if it isn't an associated client.
358 * Also, if this is a packet for aggregation, don't
359 * increase the counter because the ucode will stop
360 * aggregation queues when their respective station
361 * goes to sleep.
362 */
363 if (sta_priv && sta_priv->client && !is_agg)
364 atomic_inc(&sta_priv->pending_frames);
365
366 return 0;
367
368 drop_unlock_sta:
369 if (dev_cmd)
370 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
371 spin_unlock(&priv->shrd->sta_lock);
372 drop_unlock_priv:
373 spin_unlock_irqrestore(&priv->shrd->lock, flags);
374 return -1;
375 }
376
377 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
378 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
379 {
380 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
381 int sta_id;
382 int ret;
383
384 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
385 sta->addr, tid);
386
387 sta_id = iwl_sta_id(sta);
388 if (sta_id == IWL_INVALID_STATION) {
389 IWL_ERR(priv, "Start AGG on invalid station\n");
390 return -ENXIO;
391 }
392 if (unlikely(tid >= IWL_MAX_TID_COUNT))
393 return -EINVAL;
394
395 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
396 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
397 return -ENXIO;
398 }
399
400 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
401 if (ret)
402 return ret;
403
404 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
405 tid, ssn);
406
407 return ret;
408 }
409
410 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
411 struct ieee80211_sta *sta, u16 tid)
412 {
413 int sta_id;
414 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
415
416 sta_id = iwl_sta_id(sta);
417
418 if (sta_id == IWL_INVALID_STATION) {
419 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
420 return -ENXIO;
421 }
422
423 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
424 sta_id, tid);
425 }
426
427 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
428 struct iwl_rxon_context *ctx,
429 const u8 *addr1)
430 {
431 struct ieee80211_sta *sta;
432 struct iwl_station_priv *sta_priv;
433
434 rcu_read_lock();
435 sta = ieee80211_find_sta(ctx->vif, addr1);
436 if (sta) {
437 sta_priv = (void *)sta->drv_priv;
438 /* avoid atomic ops if this isn't a client */
439 if (sta_priv->client &&
440 atomic_dec_return(&sta_priv->pending_frames) == 0)
441 ieee80211_sta_block_awake(priv->hw, sta, false);
442 }
443 rcu_read_unlock();
444 }
445
446 /**
447 * translate ucode response to mac80211 tx status control values
448 */
449 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
450 struct ieee80211_tx_info *info)
451 {
452 struct ieee80211_tx_rate *r = &info->control.rates[0];
453
454 info->antenna_sel_tx =
455 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
456 if (rate_n_flags & RATE_MCS_HT_MSK)
457 r->flags |= IEEE80211_TX_RC_MCS;
458 if (rate_n_flags & RATE_MCS_GF_MSK)
459 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
460 if (rate_n_flags & RATE_MCS_HT40_MSK)
461 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
462 if (rate_n_flags & RATE_MCS_DUP_MSK)
463 r->flags |= IEEE80211_TX_RC_DUP_DATA;
464 if (rate_n_flags & RATE_MCS_SGI_MSK)
465 r->flags |= IEEE80211_TX_RC_SHORT_GI;
466 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
467 }
468
469 #ifdef CONFIG_IWLWIFI_DEBUG
470 const char *iwl_get_tx_fail_reason(u32 status)
471 {
472 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
473 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
474
475 switch (status & TX_STATUS_MSK) {
476 case TX_STATUS_SUCCESS:
477 return "SUCCESS";
478 TX_STATUS_POSTPONE(DELAY);
479 TX_STATUS_POSTPONE(FEW_BYTES);
480 TX_STATUS_POSTPONE(BT_PRIO);
481 TX_STATUS_POSTPONE(QUIET_PERIOD);
482 TX_STATUS_POSTPONE(CALC_TTAK);
483 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
484 TX_STATUS_FAIL(SHORT_LIMIT);
485 TX_STATUS_FAIL(LONG_LIMIT);
486 TX_STATUS_FAIL(FIFO_UNDERRUN);
487 TX_STATUS_FAIL(DRAIN_FLOW);
488 TX_STATUS_FAIL(RFKILL_FLUSH);
489 TX_STATUS_FAIL(LIFE_EXPIRE);
490 TX_STATUS_FAIL(DEST_PS);
491 TX_STATUS_FAIL(HOST_ABORTED);
492 TX_STATUS_FAIL(BT_RETRY);
493 TX_STATUS_FAIL(STA_INVALID);
494 TX_STATUS_FAIL(FRAG_DROPPED);
495 TX_STATUS_FAIL(TID_DISABLE);
496 TX_STATUS_FAIL(FIFO_FLUSHED);
497 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
498 TX_STATUS_FAIL(PASSIVE_NO_RX);
499 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
500 }
501
502 return "UNKNOWN";
503
504 #undef TX_STATUS_FAIL
505 #undef TX_STATUS_POSTPONE
506 }
507 #endif /* CONFIG_IWLWIFI_DEBUG */
508
509 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
510 {
511 status &= AGG_TX_STATUS_MSK;
512
513 switch (status) {
514 case AGG_TX_STATE_UNDERRUN_MSK:
515 priv->reply_agg_tx_stats.underrun++;
516 break;
517 case AGG_TX_STATE_BT_PRIO_MSK:
518 priv->reply_agg_tx_stats.bt_prio++;
519 break;
520 case AGG_TX_STATE_FEW_BYTES_MSK:
521 priv->reply_agg_tx_stats.few_bytes++;
522 break;
523 case AGG_TX_STATE_ABORT_MSK:
524 priv->reply_agg_tx_stats.abort++;
525 break;
526 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
527 priv->reply_agg_tx_stats.last_sent_ttl++;
528 break;
529 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
530 priv->reply_agg_tx_stats.last_sent_try++;
531 break;
532 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
533 priv->reply_agg_tx_stats.last_sent_bt_kill++;
534 break;
535 case AGG_TX_STATE_SCD_QUERY_MSK:
536 priv->reply_agg_tx_stats.scd_query++;
537 break;
538 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
539 priv->reply_agg_tx_stats.bad_crc32++;
540 break;
541 case AGG_TX_STATE_RESPONSE_MSK:
542 priv->reply_agg_tx_stats.response++;
543 break;
544 case AGG_TX_STATE_DUMP_TX_MSK:
545 priv->reply_agg_tx_stats.dump_tx++;
546 break;
547 case AGG_TX_STATE_DELAY_TX_MSK:
548 priv->reply_agg_tx_stats.delay_tx++;
549 break;
550 default:
551 priv->reply_agg_tx_stats.unknown++;
552 break;
553 }
554 }
555
556 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
557 struct iwlagn_tx_resp *tx_resp)
558 {
559 struct agg_tx_status *frame_status = &tx_resp->status;
560 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
561 IWLAGN_TX_RES_TID_POS;
562 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
563 IWLAGN_TX_RES_RA_POS;
564 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
565 u32 status = le16_to_cpu(tx_resp->status.status);
566 int i;
567
568 if (agg->wait_for_ba)
569 IWL_DEBUG_TX_REPLY(priv,
570 "got tx response w/o block-ack\n");
571
572 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
573 agg->wait_for_ba = (tx_resp->frame_count > 1);
574
575 /*
576 * If the BT kill count is non-zero, we'll get this
577 * notification again.
578 */
579 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
580 priv->cfg->bt_params &&
581 priv->cfg->bt_params->advanced_bt_coexist) {
582 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
583 }
584
585 if (tx_resp->frame_count == 1)
586 return;
587
588 /* Construct bit-map of pending frames within Tx window */
589 for (i = 0; i < tx_resp->frame_count; i++) {
590 u16 fstatus = le16_to_cpu(frame_status[i].status);
591
592 if (status & AGG_TX_STATUS_MSK)
593 iwlagn_count_agg_tx_err_status(priv, fstatus);
594
595 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
596 AGG_TX_STATE_ABORT_MSK))
597 continue;
598
599 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
600 "try-count (0x%08x)\n",
601 iwl_get_agg_tx_fail_reason(fstatus),
602 fstatus & AGG_TX_STATUS_MSK,
603 fstatus & AGG_TX_TRY_MSK);
604 }
605 }
606
607 #ifdef CONFIG_IWLWIFI_DEBUG
608 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
609
610 const char *iwl_get_agg_tx_fail_reason(u16 status)
611 {
612 status &= AGG_TX_STATUS_MSK;
613 switch (status) {
614 case AGG_TX_STATE_TRANSMITTED:
615 return "SUCCESS";
616 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
617 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
618 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
619 AGG_TX_STATE_FAIL(ABORT_MSK);
620 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
621 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
622 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
623 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
624 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
625 AGG_TX_STATE_FAIL(RESPONSE_MSK);
626 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
627 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
628 }
629
630 return "UNKNOWN";
631 }
632 #endif /* CONFIG_IWLWIFI_DEBUG */
633
634 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
635 {
636 return le32_to_cpup((__le32 *)&tx_resp->status +
637 tx_resp->frame_count) & MAX_SN;
638 }
639
640 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
641 {
642 status &= TX_STATUS_MSK;
643
644 switch (status) {
645 case TX_STATUS_POSTPONE_DELAY:
646 priv->reply_tx_stats.pp_delay++;
647 break;
648 case TX_STATUS_POSTPONE_FEW_BYTES:
649 priv->reply_tx_stats.pp_few_bytes++;
650 break;
651 case TX_STATUS_POSTPONE_BT_PRIO:
652 priv->reply_tx_stats.pp_bt_prio++;
653 break;
654 case TX_STATUS_POSTPONE_QUIET_PERIOD:
655 priv->reply_tx_stats.pp_quiet_period++;
656 break;
657 case TX_STATUS_POSTPONE_CALC_TTAK:
658 priv->reply_tx_stats.pp_calc_ttak++;
659 break;
660 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
661 priv->reply_tx_stats.int_crossed_retry++;
662 break;
663 case TX_STATUS_FAIL_SHORT_LIMIT:
664 priv->reply_tx_stats.short_limit++;
665 break;
666 case TX_STATUS_FAIL_LONG_LIMIT:
667 priv->reply_tx_stats.long_limit++;
668 break;
669 case TX_STATUS_FAIL_FIFO_UNDERRUN:
670 priv->reply_tx_stats.fifo_underrun++;
671 break;
672 case TX_STATUS_FAIL_DRAIN_FLOW:
673 priv->reply_tx_stats.drain_flow++;
674 break;
675 case TX_STATUS_FAIL_RFKILL_FLUSH:
676 priv->reply_tx_stats.rfkill_flush++;
677 break;
678 case TX_STATUS_FAIL_LIFE_EXPIRE:
679 priv->reply_tx_stats.life_expire++;
680 break;
681 case TX_STATUS_FAIL_DEST_PS:
682 priv->reply_tx_stats.dest_ps++;
683 break;
684 case TX_STATUS_FAIL_HOST_ABORTED:
685 priv->reply_tx_stats.host_abort++;
686 break;
687 case TX_STATUS_FAIL_BT_RETRY:
688 priv->reply_tx_stats.bt_retry++;
689 break;
690 case TX_STATUS_FAIL_STA_INVALID:
691 priv->reply_tx_stats.sta_invalid++;
692 break;
693 case TX_STATUS_FAIL_FRAG_DROPPED:
694 priv->reply_tx_stats.frag_drop++;
695 break;
696 case TX_STATUS_FAIL_TID_DISABLE:
697 priv->reply_tx_stats.tid_disable++;
698 break;
699 case TX_STATUS_FAIL_FIFO_FLUSHED:
700 priv->reply_tx_stats.fifo_flush++;
701 break;
702 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
703 priv->reply_tx_stats.insuff_cf_poll++;
704 break;
705 case TX_STATUS_FAIL_PASSIVE_NO_RX:
706 priv->reply_tx_stats.fail_hw_drop++;
707 break;
708 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
709 priv->reply_tx_stats.sta_color_mismatch++;
710 break;
711 default:
712 priv->reply_tx_stats.unknown++;
713 break;
714 }
715 }
716
717 static void iwlagn_set_tx_status(struct iwl_priv *priv,
718 struct ieee80211_tx_info *info,
719 struct iwlagn_tx_resp *tx_resp,
720 bool is_agg)
721 {
722 u16 status = le16_to_cpu(tx_resp->status.status);
723
724 info->status.rates[0].count = tx_resp->failure_frame + 1;
725 if (is_agg)
726 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
727 info->flags |= iwl_tx_status_to_mac80211(status);
728 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
729 info);
730 if (!iwl_is_tx_success(status))
731 iwlagn_count_tx_err_status(priv, status);
732 }
733
734 static void iwl_check_abort_status(struct iwl_priv *priv,
735 u8 frame_count, u32 status)
736 {
737 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
738 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
739 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
740 queue_work(priv->shrd->workqueue, &priv->tx_flush);
741 }
742 }
743
744 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
745 struct iwl_device_cmd *cmd)
746 {
747 struct iwl_rx_packet *pkt = rxb_addr(rxb);
748 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
749 int txq_id = SEQ_TO_QUEUE(sequence);
750 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
751 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
752 struct ieee80211_hdr *hdr;
753 u32 status = le16_to_cpu(tx_resp->status.status);
754 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
755 int tid;
756 int sta_id;
757 int freed;
758 struct ieee80211_tx_info *info;
759 unsigned long flags;
760 struct sk_buff_head skbs;
761 struct sk_buff *skb;
762 struct iwl_rxon_context *ctx;
763 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
764
765 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
766 IWLAGN_TX_RES_TID_POS;
767 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
768 IWLAGN_TX_RES_RA_POS;
769
770 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
771
772 if (is_agg)
773 iwl_rx_reply_tx_agg(priv, tx_resp);
774
775 if (tx_resp->frame_count == 1) {
776 __skb_queue_head_init(&skbs);
777 /*we can free until ssn % q.n_bd not inclusive */
778 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
779 ssn, status, &skbs);
780 freed = 0;
781 while (!skb_queue_empty(&skbs)) {
782 skb = __skb_dequeue(&skbs);
783 hdr = (struct ieee80211_hdr *)skb->data;
784
785 if (!ieee80211_is_data_qos(hdr->frame_control))
786 priv->last_seq_ctl = tx_resp->seq_ctl;
787
788 info = IEEE80211_SKB_CB(skb);
789 ctx = info->driver_data[0];
790 kmem_cache_free(priv->tx_cmd_pool,
791 (info->driver_data[1]));
792
793 memset(&info->status, 0, sizeof(info->status));
794
795 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
796 iwl_is_associated_ctx(ctx) && ctx->vif &&
797 ctx->vif->type == NL80211_IFTYPE_STATION) {
798 ctx->last_tx_rejected = true;
799 iwl_trans_stop_queue(trans(priv), txq_id);
800
801 IWL_DEBUG_TX_REPLY(priv,
802 "TXQ %d status %s (0x%08x) "
803 "rate_n_flags 0x%x retries %d\n",
804 txq_id,
805 iwl_get_tx_fail_reason(status),
806 status,
807 le32_to_cpu(tx_resp->rate_n_flags),
808 tx_resp->failure_frame);
809
810 IWL_DEBUG_TX_REPLY(priv,
811 "FrameCnt = %d, idx=%d\n",
812 tx_resp->frame_count, cmd_index);
813 }
814
815 /* check if BAR is needed */
816 if (is_agg && !iwl_is_tx_success(status))
817 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
818 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
819 tx_resp, is_agg);
820 if (!is_agg)
821 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
822
823 ieee80211_tx_status_irqsafe(priv->hw, skb);
824
825 freed++;
826 }
827
828 WARN_ON(!is_agg && freed != 1);
829 }
830
831 iwl_check_abort_status(priv, tx_resp->frame_count, status);
832 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
833 return 0;
834 }
835
836 /**
837 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
838 *
839 * Handles block-acknowledge notification from device, which reports success
840 * of frames sent via aggregation.
841 */
842 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
843 struct iwl_rx_mem_buffer *rxb,
844 struct iwl_device_cmd *cmd)
845 {
846 struct iwl_rx_packet *pkt = rxb_addr(rxb);
847 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
848 struct iwl_ht_agg *agg;
849 struct sk_buff_head reclaimed_skbs;
850 struct ieee80211_tx_info *info;
851 struct ieee80211_hdr *hdr;
852 struct sk_buff *skb;
853 unsigned long flags;
854 int sta_id;
855 int tid;
856 int freed;
857
858 /* "flow" corresponds to Tx queue */
859 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
860
861 /* "ssn" is start of block-ack Tx window, corresponds to index
862 * (in Tx queue's circular buffer) of first TFD/frame in window */
863 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
864
865 if (scd_flow >= hw_params(priv).max_txq_num) {
866 IWL_ERR(priv,
867 "BUG_ON scd_flow is bigger than number of queues\n");
868 return 0;
869 }
870
871 sta_id = ba_resp->sta_id;
872 tid = ba_resp->tid;
873 agg = &priv->shrd->tid_data[sta_id][tid].agg;
874
875 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
876
877 if (unlikely(agg->txq_id != scd_flow)) {
878 /*
879 * FIXME: this is a uCode bug which need to be addressed,
880 * log the information and return for now!
881 * since it is possible happen very often and in order
882 * not to fill the syslog, don't enable the logging by default
883 */
884 IWL_DEBUG_TX_REPLY(priv,
885 "BA scd_flow %d does not match txq_id %d\n",
886 scd_flow, agg->txq_id);
887 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
888 return 0;
889 }
890
891 if (unlikely(!agg->wait_for_ba)) {
892 if (unlikely(ba_resp->bitmap))
893 IWL_ERR(priv, "Received BA when not expected\n");
894 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
895 return 0;
896 }
897
898 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
899 "sta_id = %d\n",
900 agg->wait_for_ba,
901 (u8 *) &ba_resp->sta_addr_lo32,
902 ba_resp->sta_id);
903 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
904 "scd_flow = %d, scd_ssn = %d\n",
905 ba_resp->tid,
906 ba_resp->seq_ctl,
907 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
908 ba_resp->scd_flow,
909 ba_resp->scd_ssn);
910
911 /* Mark that the expected block-ack response arrived */
912 agg->wait_for_ba = false;
913
914 /* Sanity check values reported by uCode */
915 if (ba_resp->txed_2_done > ba_resp->txed) {
916 IWL_DEBUG_TX_REPLY(priv,
917 "bogus sent(%d) and ack(%d) count\n",
918 ba_resp->txed, ba_resp->txed_2_done);
919 /*
920 * set txed_2_done = txed,
921 * so it won't impact rate scale
922 */
923 ba_resp->txed = ba_resp->txed_2_done;
924 }
925 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
926 ba_resp->txed, ba_resp->txed_2_done);
927
928 __skb_queue_head_init(&reclaimed_skbs);
929
930 /* Release all TFDs before the SSN, i.e. all TFDs in front of
931 * block-ack window (we assume that they've been successfully
932 * transmitted ... if not, it's too late anyway). */
933 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
934 0, &reclaimed_skbs);
935 freed = 0;
936 while (!skb_queue_empty(&reclaimed_skbs)) {
937
938 skb = __skb_dequeue(&reclaimed_skbs);
939 hdr = (struct ieee80211_hdr *)skb->data;
940
941 if (ieee80211_is_data_qos(hdr->frame_control))
942 freed++;
943 else
944 WARN_ON_ONCE(1);
945
946 info = IEEE80211_SKB_CB(skb);
947 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
948
949 if (freed == 1) {
950 /* this is the first skb we deliver in this batch */
951 /* put the rate scaling data there */
952 info = IEEE80211_SKB_CB(skb);
953 memset(&info->status, 0, sizeof(info->status));
954 info->flags |= IEEE80211_TX_STAT_ACK;
955 info->flags |= IEEE80211_TX_STAT_AMPDU;
956 info->status.ampdu_ack_len = ba_resp->txed_2_done;
957 info->status.ampdu_len = ba_resp->txed;
958 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
959 info);
960 }
961
962 ieee80211_tx_status_irqsafe(priv->hw, skb);
963 }
964
965 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
966 return 0;
967 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree