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iwlagn: use low retry limit for WoWLAN
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
blobf849097cf7e66e4cd3db38385d17195b498b5e58
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 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
117 struct iwl_tx_cmd *tx_cmd,
118 struct ieee80211_tx_info *info,
119 __le16 fc)
120 {
121 u32 rate_flags;
122 int rate_idx;
123 u8 rts_retry_limit;
124 u8 data_retry_limit;
125 u8 rate_plcp;
126
127 if (priv->shrd->wowlan) {
128 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
129 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
130 } else {
131 /* Set retry limit on RTS packets */
132 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
133
134 /* Set retry limit on DATA packets and Probe Responses*/
135 if (ieee80211_is_probe_resp(fc)) {
136 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
137 rts_retry_limit =
138 min(data_retry_limit, rts_retry_limit);
139 } else if (ieee80211_is_back_req(fc))
140 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
141 else
142 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
143 }
144
145 tx_cmd->data_retry_limit = data_retry_limit;
146 tx_cmd->rts_retry_limit = rts_retry_limit;
147
148 /* DATA packets will use the uCode station table for rate/antenna
149 * selection */
150 if (ieee80211_is_data(fc)) {
151 tx_cmd->initial_rate_index = 0;
152 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
153 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
154 if (priv->tm_fixed_rate) {
155 /*
156 * rate overwrite by testmode
157 * we not only send lq command to change rate
158 * we also re-enforce per data pkt base.
159 */
160 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
161 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
162 sizeof(tx_cmd->rate_n_flags));
163 }
164 #endif
165 return;
166 }
167
168 /**
169 * If the current TX rate stored in mac80211 has the MCS bit set, it's
170 * not really a TX rate. Thus, we use the lowest supported rate for
171 * this band. Also use the lowest supported rate if the stored rate
172 * index is invalid.
173 */
174 rate_idx = info->control.rates[0].idx;
175 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
176 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
177 rate_idx = rate_lowest_index(&priv->bands[info->band],
178 info->control.sta);
179 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
180 if (info->band == IEEE80211_BAND_5GHZ)
181 rate_idx += IWL_FIRST_OFDM_RATE;
182 /* Get PLCP rate for tx_cmd->rate_n_flags */
183 rate_plcp = iwl_rates[rate_idx].plcp;
184 /* Zero out flags for this packet */
185 rate_flags = 0;
186
187 /* Set CCK flag as needed */
188 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
189 rate_flags |= RATE_MCS_CCK_MSK;
190
191 /* Set up antennas */
192 if (priv->cfg->bt_params &&
193 priv->cfg->bt_params->advanced_bt_coexist &&
194 priv->bt_full_concurrent) {
195 /* operated as 1x1 in full concurrency mode */
196 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
197 first_antenna(hw_params(priv).valid_tx_ant));
198 } else
199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
200 hw_params(priv).valid_tx_ant);
201 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
202
203 /* Set the rate in the TX cmd */
204 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
205 }
206
207 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
208 struct ieee80211_tx_info *info,
209 struct iwl_tx_cmd *tx_cmd,
210 struct sk_buff *skb_frag,
211 int sta_id)
212 {
213 struct ieee80211_key_conf *keyconf = info->control.hw_key;
214
215 switch (keyconf->cipher) {
216 case WLAN_CIPHER_SUITE_CCMP:
217 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
218 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
219 if (info->flags & IEEE80211_TX_CTL_AMPDU)
220 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
221 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
222 break;
223
224 case WLAN_CIPHER_SUITE_TKIP:
225 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
226 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
227 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
228 break;
229
230 case WLAN_CIPHER_SUITE_WEP104:
231 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
232 /* fall through */
233 case WLAN_CIPHER_SUITE_WEP40:
234 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
235 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
236
237 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
238
239 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
240 "with key %d\n", keyconf->keyidx);
241 break;
242
243 default:
244 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
245 break;
246 }
247 }
248
249 /*
250 * start REPLY_TX command process
251 */
252 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
253 {
254 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
255 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
256 struct iwl_station_priv *sta_priv = NULL;
257 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
258 struct iwl_device_cmd *dev_cmd = NULL;
259 struct iwl_tx_cmd *tx_cmd;
260
261 __le16 fc;
262 u8 hdr_len;
263 u16 len;
264 u8 sta_id;
265 unsigned long flags;
266 bool is_agg = false;
267
268 if (info->control.vif)
269 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
270
271 spin_lock_irqsave(&priv->shrd->lock, flags);
272 if (iwl_is_rfkill(priv->shrd)) {
273 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
274 goto drop_unlock_priv;
275 }
276
277 fc = hdr->frame_control;
278
279 #ifdef CONFIG_IWLWIFI_DEBUG
280 if (ieee80211_is_auth(fc))
281 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
282 else if (ieee80211_is_assoc_req(fc))
283 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
284 else if (ieee80211_is_reassoc_req(fc))
285 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
286 #endif
287
288 hdr_len = ieee80211_hdrlen(fc);
289
290 /* For management frames use broadcast id to do not break aggregation */
291 if (!ieee80211_is_data(fc))
292 sta_id = ctx->bcast_sta_id;
293 else {
294 /* Find index into station table for destination station */
295 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
296 if (sta_id == IWL_INVALID_STATION) {
297 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
298 hdr->addr1);
299 goto drop_unlock_priv;
300 }
301 }
302
303 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
304
305 if (info->control.sta)
306 sta_priv = (void *)info->control.sta->drv_priv;
307
308 if (sta_priv && sta_priv->asleep &&
309 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
310 /*
311 * This sends an asynchronous command to the device,
312 * but we can rely on it being processed before the
313 * next frame is processed -- and the next frame to
314 * this station is the one that will consume this
315 * counter.
316 * For now set the counter to just 1 since we do not
317 * support uAPSD yet.
318 */
319 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
320 }
321
322 if (info->flags & IEEE80211_TX_CTL_AMPDU)
323 is_agg = true;
324
325 /* irqs already disabled/saved above when locking priv->shrd->lock */
326 spin_lock(&priv->shrd->sta_lock);
327
328 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
329
330 if (unlikely(!dev_cmd))
331 goto drop_unlock_sta;
332
333 memset(dev_cmd, 0, sizeof(*dev_cmd));
334 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
335
336 /* Total # bytes to be transmitted */
337 len = (u16)skb->len;
338 tx_cmd->len = cpu_to_le16(len);
339
340 if (info->control.hw_key)
341 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
342
343 /* TODO need this for burst mode later on */
344 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
345 iwl_dbg_log_tx_data_frame(priv, len, hdr);
346
347 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
348
349 iwl_update_stats(priv, true, fc, len);
350
351 memset(&info->status, 0, sizeof(info->status));
352
353 info->driver_data[0] = ctx;
354 info->driver_data[1] = dev_cmd;
355
356 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
357 goto drop_unlock_sta;
358
359 spin_unlock(&priv->shrd->sta_lock);
360 spin_unlock_irqrestore(&priv->shrd->lock, flags);
361
362 /*
363 * Avoid atomic ops if it isn't an associated client.
364 * Also, if this is a packet for aggregation, don't
365 * increase the counter because the ucode will stop
366 * aggregation queues when their respective station
367 * goes to sleep.
368 */
369 if (sta_priv && sta_priv->client && !is_agg)
370 atomic_inc(&sta_priv->pending_frames);
371
372 return 0;
373
374 drop_unlock_sta:
375 if (dev_cmd)
376 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
377 spin_unlock(&priv->shrd->sta_lock);
378 drop_unlock_priv:
379 spin_unlock_irqrestore(&priv->shrd->lock, flags);
380 return -1;
381 }
382
383 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
384 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
385 {
386 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
387 int sta_id;
388 int ret;
389
390 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
391 sta->addr, tid);
392
393 sta_id = iwl_sta_id(sta);
394 if (sta_id == IWL_INVALID_STATION) {
395 IWL_ERR(priv, "Start AGG on invalid station\n");
396 return -ENXIO;
397 }
398 if (unlikely(tid >= IWL_MAX_TID_COUNT))
399 return -EINVAL;
400
401 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
402 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
403 return -ENXIO;
404 }
405
406 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
407 if (ret)
408 return ret;
409
410 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
411 tid, ssn);
412
413 return ret;
414 }
415
416 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
417 struct ieee80211_sta *sta, u16 tid)
418 {
419 int sta_id;
420 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
421
422 sta_id = iwl_sta_id(sta);
423
424 if (sta_id == IWL_INVALID_STATION) {
425 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
426 return -ENXIO;
427 }
428
429 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
430 sta_id, tid);
431 }
432
433 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
434 struct iwl_rxon_context *ctx,
435 const u8 *addr1)
436 {
437 struct ieee80211_sta *sta;
438 struct iwl_station_priv *sta_priv;
439
440 rcu_read_lock();
441 sta = ieee80211_find_sta(ctx->vif, addr1);
442 if (sta) {
443 sta_priv = (void *)sta->drv_priv;
444 /* avoid atomic ops if this isn't a client */
445 if (sta_priv->client &&
446 atomic_dec_return(&sta_priv->pending_frames) == 0)
447 ieee80211_sta_block_awake(priv->hw, sta, false);
448 }
449 rcu_read_unlock();
450 }
451
452 /**
453 * translate ucode response to mac80211 tx status control values
454 */
455 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
456 struct ieee80211_tx_info *info)
457 {
458 struct ieee80211_tx_rate *r = &info->control.rates[0];
459
460 info->antenna_sel_tx =
461 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
462 if (rate_n_flags & RATE_MCS_HT_MSK)
463 r->flags |= IEEE80211_TX_RC_MCS;
464 if (rate_n_flags & RATE_MCS_GF_MSK)
465 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
466 if (rate_n_flags & RATE_MCS_HT40_MSK)
467 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
468 if (rate_n_flags & RATE_MCS_DUP_MSK)
469 r->flags |= IEEE80211_TX_RC_DUP_DATA;
470 if (rate_n_flags & RATE_MCS_SGI_MSK)
471 r->flags |= IEEE80211_TX_RC_SHORT_GI;
472 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
473 }
474
475 #ifdef CONFIG_IWLWIFI_DEBUG
476 const char *iwl_get_tx_fail_reason(u32 status)
477 {
478 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
479 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
480
481 switch (status & TX_STATUS_MSK) {
482 case TX_STATUS_SUCCESS:
483 return "SUCCESS";
484 TX_STATUS_POSTPONE(DELAY);
485 TX_STATUS_POSTPONE(FEW_BYTES);
486 TX_STATUS_POSTPONE(BT_PRIO);
487 TX_STATUS_POSTPONE(QUIET_PERIOD);
488 TX_STATUS_POSTPONE(CALC_TTAK);
489 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
490 TX_STATUS_FAIL(SHORT_LIMIT);
491 TX_STATUS_FAIL(LONG_LIMIT);
492 TX_STATUS_FAIL(FIFO_UNDERRUN);
493 TX_STATUS_FAIL(DRAIN_FLOW);
494 TX_STATUS_FAIL(RFKILL_FLUSH);
495 TX_STATUS_FAIL(LIFE_EXPIRE);
496 TX_STATUS_FAIL(DEST_PS);
497 TX_STATUS_FAIL(HOST_ABORTED);
498 TX_STATUS_FAIL(BT_RETRY);
499 TX_STATUS_FAIL(STA_INVALID);
500 TX_STATUS_FAIL(FRAG_DROPPED);
501 TX_STATUS_FAIL(TID_DISABLE);
502 TX_STATUS_FAIL(FIFO_FLUSHED);
503 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
504 TX_STATUS_FAIL(PASSIVE_NO_RX);
505 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
506 }
507
508 return "UNKNOWN";
509
510 #undef TX_STATUS_FAIL
511 #undef TX_STATUS_POSTPONE
512 }
513 #endif /* CONFIG_IWLWIFI_DEBUG */
514
515 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
516 {
517 status &= AGG_TX_STATUS_MSK;
518
519 switch (status) {
520 case AGG_TX_STATE_UNDERRUN_MSK:
521 priv->reply_agg_tx_stats.underrun++;
522 break;
523 case AGG_TX_STATE_BT_PRIO_MSK:
524 priv->reply_agg_tx_stats.bt_prio++;
525 break;
526 case AGG_TX_STATE_FEW_BYTES_MSK:
527 priv->reply_agg_tx_stats.few_bytes++;
528 break;
529 case AGG_TX_STATE_ABORT_MSK:
530 priv->reply_agg_tx_stats.abort++;
531 break;
532 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
533 priv->reply_agg_tx_stats.last_sent_ttl++;
534 break;
535 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
536 priv->reply_agg_tx_stats.last_sent_try++;
537 break;
538 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
539 priv->reply_agg_tx_stats.last_sent_bt_kill++;
540 break;
541 case AGG_TX_STATE_SCD_QUERY_MSK:
542 priv->reply_agg_tx_stats.scd_query++;
543 break;
544 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
545 priv->reply_agg_tx_stats.bad_crc32++;
546 break;
547 case AGG_TX_STATE_RESPONSE_MSK:
548 priv->reply_agg_tx_stats.response++;
549 break;
550 case AGG_TX_STATE_DUMP_TX_MSK:
551 priv->reply_agg_tx_stats.dump_tx++;
552 break;
553 case AGG_TX_STATE_DELAY_TX_MSK:
554 priv->reply_agg_tx_stats.delay_tx++;
555 break;
556 default:
557 priv->reply_agg_tx_stats.unknown++;
558 break;
559 }
560 }
561
562 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
563 struct iwlagn_tx_resp *tx_resp)
564 {
565 struct agg_tx_status *frame_status = &tx_resp->status;
566 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
567 IWLAGN_TX_RES_TID_POS;
568 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
569 IWLAGN_TX_RES_RA_POS;
570 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
571 u32 status = le16_to_cpu(tx_resp->status.status);
572 int i;
573
574 if (agg->wait_for_ba)
575 IWL_DEBUG_TX_REPLY(priv,
576 "got tx response w/o block-ack\n");
577
578 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
579 agg->wait_for_ba = (tx_resp->frame_count > 1);
580
581 /*
582 * If the BT kill count is non-zero, we'll get this
583 * notification again.
584 */
585 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
586 priv->cfg->bt_params &&
587 priv->cfg->bt_params->advanced_bt_coexist) {
588 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
589 }
590
591 if (tx_resp->frame_count == 1)
592 return;
593
594 /* Construct bit-map of pending frames within Tx window */
595 for (i = 0; i < tx_resp->frame_count; i++) {
596 u16 fstatus = le16_to_cpu(frame_status[i].status);
597
598 if (status & AGG_TX_STATUS_MSK)
599 iwlagn_count_agg_tx_err_status(priv, fstatus);
600
601 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
602 AGG_TX_STATE_ABORT_MSK))
603 continue;
604
605 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
606 "try-count (0x%08x)\n",
607 iwl_get_agg_tx_fail_reason(fstatus),
608 fstatus & AGG_TX_STATUS_MSK,
609 fstatus & AGG_TX_TRY_MSK);
610 }
611 }
612
613 #ifdef CONFIG_IWLWIFI_DEBUG
614 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
615
616 const char *iwl_get_agg_tx_fail_reason(u16 status)
617 {
618 status &= AGG_TX_STATUS_MSK;
619 switch (status) {
620 case AGG_TX_STATE_TRANSMITTED:
621 return "SUCCESS";
622 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
623 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
624 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
625 AGG_TX_STATE_FAIL(ABORT_MSK);
626 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
627 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
628 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
629 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
630 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
631 AGG_TX_STATE_FAIL(RESPONSE_MSK);
632 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
633 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
634 }
635
636 return "UNKNOWN";
637 }
638 #endif /* CONFIG_IWLWIFI_DEBUG */
639
640 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
641 {
642 return le32_to_cpup((__le32 *)&tx_resp->status +
643 tx_resp->frame_count) & MAX_SN;
644 }
645
646 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
647 {
648 status &= TX_STATUS_MSK;
649
650 switch (status) {
651 case TX_STATUS_POSTPONE_DELAY:
652 priv->reply_tx_stats.pp_delay++;
653 break;
654 case TX_STATUS_POSTPONE_FEW_BYTES:
655 priv->reply_tx_stats.pp_few_bytes++;
656 break;
657 case TX_STATUS_POSTPONE_BT_PRIO:
658 priv->reply_tx_stats.pp_bt_prio++;
659 break;
660 case TX_STATUS_POSTPONE_QUIET_PERIOD:
661 priv->reply_tx_stats.pp_quiet_period++;
662 break;
663 case TX_STATUS_POSTPONE_CALC_TTAK:
664 priv->reply_tx_stats.pp_calc_ttak++;
665 break;
666 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
667 priv->reply_tx_stats.int_crossed_retry++;
668 break;
669 case TX_STATUS_FAIL_SHORT_LIMIT:
670 priv->reply_tx_stats.short_limit++;
671 break;
672 case TX_STATUS_FAIL_LONG_LIMIT:
673 priv->reply_tx_stats.long_limit++;
674 break;
675 case TX_STATUS_FAIL_FIFO_UNDERRUN:
676 priv->reply_tx_stats.fifo_underrun++;
677 break;
678 case TX_STATUS_FAIL_DRAIN_FLOW:
679 priv->reply_tx_stats.drain_flow++;
680 break;
681 case TX_STATUS_FAIL_RFKILL_FLUSH:
682 priv->reply_tx_stats.rfkill_flush++;
683 break;
684 case TX_STATUS_FAIL_LIFE_EXPIRE:
685 priv->reply_tx_stats.life_expire++;
686 break;
687 case TX_STATUS_FAIL_DEST_PS:
688 priv->reply_tx_stats.dest_ps++;
689 break;
690 case TX_STATUS_FAIL_HOST_ABORTED:
691 priv->reply_tx_stats.host_abort++;
692 break;
693 case TX_STATUS_FAIL_BT_RETRY:
694 priv->reply_tx_stats.bt_retry++;
695 break;
696 case TX_STATUS_FAIL_STA_INVALID:
697 priv->reply_tx_stats.sta_invalid++;
698 break;
699 case TX_STATUS_FAIL_FRAG_DROPPED:
700 priv->reply_tx_stats.frag_drop++;
701 break;
702 case TX_STATUS_FAIL_TID_DISABLE:
703 priv->reply_tx_stats.tid_disable++;
704 break;
705 case TX_STATUS_FAIL_FIFO_FLUSHED:
706 priv->reply_tx_stats.fifo_flush++;
707 break;
708 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
709 priv->reply_tx_stats.insuff_cf_poll++;
710 break;
711 case TX_STATUS_FAIL_PASSIVE_NO_RX:
712 priv->reply_tx_stats.fail_hw_drop++;
713 break;
714 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
715 priv->reply_tx_stats.sta_color_mismatch++;
716 break;
717 default:
718 priv->reply_tx_stats.unknown++;
719 break;
720 }
721 }
722
723 static void iwlagn_set_tx_status(struct iwl_priv *priv,
724 struct ieee80211_tx_info *info,
725 struct iwlagn_tx_resp *tx_resp,
726 bool is_agg)
727 {
728 u16 status = le16_to_cpu(tx_resp->status.status);
729
730 info->status.rates[0].count = tx_resp->failure_frame + 1;
731 if (is_agg)
732 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
733 info->flags |= iwl_tx_status_to_mac80211(status);
734 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
735 info);
736 if (!iwl_is_tx_success(status))
737 iwlagn_count_tx_err_status(priv, status);
738 }
739
740 static void iwl_check_abort_status(struct iwl_priv *priv,
741 u8 frame_count, u32 status)
742 {
743 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
744 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
745 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
746 queue_work(priv->shrd->workqueue, &priv->tx_flush);
747 }
748 }
749
750 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
751 struct iwl_device_cmd *cmd)
752 {
753 struct iwl_rx_packet *pkt = rxb_addr(rxb);
754 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
755 int txq_id = SEQ_TO_QUEUE(sequence);
756 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
757 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
758 struct ieee80211_hdr *hdr;
759 u32 status = le16_to_cpu(tx_resp->status.status);
760 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
761 int tid;
762 int sta_id;
763 int freed;
764 struct ieee80211_tx_info *info;
765 unsigned long flags;
766 struct sk_buff_head skbs;
767 struct sk_buff *skb;
768 struct iwl_rxon_context *ctx;
769 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
770
771 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
772 IWLAGN_TX_RES_TID_POS;
773 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
774 IWLAGN_TX_RES_RA_POS;
775
776 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
777
778 if (is_agg)
779 iwl_rx_reply_tx_agg(priv, tx_resp);
780
781 if (tx_resp->frame_count == 1) {
782 __skb_queue_head_init(&skbs);
783 /*we can free until ssn % q.n_bd not inclusive */
784 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
785 ssn, status, &skbs);
786 freed = 0;
787 while (!skb_queue_empty(&skbs)) {
788 skb = __skb_dequeue(&skbs);
789 hdr = (struct ieee80211_hdr *)skb->data;
790
791 if (!ieee80211_is_data_qos(hdr->frame_control))
792 priv->last_seq_ctl = tx_resp->seq_ctl;
793
794 info = IEEE80211_SKB_CB(skb);
795 ctx = info->driver_data[0];
796 kmem_cache_free(priv->tx_cmd_pool,
797 (info->driver_data[1]));
798
799 memset(&info->status, 0, sizeof(info->status));
800
801 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
802 iwl_is_associated_ctx(ctx) && ctx->vif &&
803 ctx->vif->type == NL80211_IFTYPE_STATION) {
804 ctx->last_tx_rejected = true;
805 iwl_trans_stop_queue(trans(priv), txq_id);
806
807 IWL_DEBUG_TX_REPLY(priv,
808 "TXQ %d status %s (0x%08x) "
809 "rate_n_flags 0x%x retries %d\n",
810 txq_id,
811 iwl_get_tx_fail_reason(status),
812 status,
813 le32_to_cpu(tx_resp->rate_n_flags),
814 tx_resp->failure_frame);
815
816 IWL_DEBUG_TX_REPLY(priv,
817 "FrameCnt = %d, idx=%d\n",
818 tx_resp->frame_count, cmd_index);
819 }
820
821 /* check if BAR is needed */
822 if (is_agg && !iwl_is_tx_success(status))
823 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
824 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
825 tx_resp, is_agg);
826 if (!is_agg)
827 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
828
829 ieee80211_tx_status_irqsafe(priv->hw, skb);
830
831 freed++;
832 }
833
834 WARN_ON(!is_agg && freed != 1);
835 }
836
837 iwl_check_abort_status(priv, tx_resp->frame_count, status);
838 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
839 return 0;
840 }
841
842 /**
843 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
844 *
845 * Handles block-acknowledge notification from device, which reports success
846 * of frames sent via aggregation.
847 */
848 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
849 struct iwl_rx_mem_buffer *rxb,
850 struct iwl_device_cmd *cmd)
851 {
852 struct iwl_rx_packet *pkt = rxb_addr(rxb);
853 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
854 struct iwl_ht_agg *agg;
855 struct sk_buff_head reclaimed_skbs;
856 struct ieee80211_tx_info *info;
857 struct ieee80211_hdr *hdr;
858 struct sk_buff *skb;
859 unsigned long flags;
860 int sta_id;
861 int tid;
862 int freed;
863
864 /* "flow" corresponds to Tx queue */
865 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
866
867 /* "ssn" is start of block-ack Tx window, corresponds to index
868 * (in Tx queue's circular buffer) of first TFD/frame in window */
869 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
870
871 if (scd_flow >= hw_params(priv).max_txq_num) {
872 IWL_ERR(priv,
873 "BUG_ON scd_flow is bigger than number of queues\n");
874 return 0;
875 }
876
877 sta_id = ba_resp->sta_id;
878 tid = ba_resp->tid;
879 agg = &priv->shrd->tid_data[sta_id][tid].agg;
880
881 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
882
883 if (unlikely(agg->txq_id != scd_flow)) {
884 /*
885 * FIXME: this is a uCode bug which need to be addressed,
886 * log the information and return for now!
887 * since it is possible happen very often and in order
888 * not to fill the syslog, don't enable the logging by default
889 */
890 IWL_DEBUG_TX_REPLY(priv,
891 "BA scd_flow %d does not match txq_id %d\n",
892 scd_flow, agg->txq_id);
893 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
894 return 0;
895 }
896
897 if (unlikely(!agg->wait_for_ba)) {
898 if (unlikely(ba_resp->bitmap))
899 IWL_ERR(priv, "Received BA when not expected\n");
900 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
901 return 0;
902 }
903
904 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
905 "sta_id = %d\n",
906 agg->wait_for_ba,
907 (u8 *) &ba_resp->sta_addr_lo32,
908 ba_resp->sta_id);
909 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
910 "scd_flow = %d, scd_ssn = %d\n",
911 ba_resp->tid,
912 ba_resp->seq_ctl,
913 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
914 ba_resp->scd_flow,
915 ba_resp->scd_ssn);
916
917 /* Mark that the expected block-ack response arrived */
918 agg->wait_for_ba = false;
919
920 /* Sanity check values reported by uCode */
921 if (ba_resp->txed_2_done > ba_resp->txed) {
922 IWL_DEBUG_TX_REPLY(priv,
923 "bogus sent(%d) and ack(%d) count\n",
924 ba_resp->txed, ba_resp->txed_2_done);
925 /*
926 * set txed_2_done = txed,
927 * so it won't impact rate scale
928 */
929 ba_resp->txed = ba_resp->txed_2_done;
930 }
931 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
932 ba_resp->txed, ba_resp->txed_2_done);
933
934 __skb_queue_head_init(&reclaimed_skbs);
935
936 /* Release all TFDs before the SSN, i.e. all TFDs in front of
937 * block-ack window (we assume that they've been successfully
938 * transmitted ... if not, it's too late anyway). */
939 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
940 0, &reclaimed_skbs);
941 freed = 0;
942 while (!skb_queue_empty(&reclaimed_skbs)) {
943
944 skb = __skb_dequeue(&reclaimed_skbs);
945 hdr = (struct ieee80211_hdr *)skb->data;
946
947 if (ieee80211_is_data_qos(hdr->frame_control))
948 freed++;
949 else
950 WARN_ON_ONCE(1);
951
952 info = IEEE80211_SKB_CB(skb);
953 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
954
955 if (freed == 1) {
956 /* this is the first skb we deliver in this batch */
957 /* put the rate scaling data there */
958 info = IEEE80211_SKB_CB(skb);
959 memset(&info->status, 0, sizeof(info->status));
960 info->flags |= IEEE80211_TX_STAT_ACK;
961 info->flags |= IEEE80211_TX_STAT_AMPDU;
962 info->status.ampdu_ack_len = ba_resp->txed_2_done;
963 info->status.ampdu_len = ba_resp->txed;
964 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
965 info);
966 }
967
968 ieee80211_tx_status_irqsafe(priv->hw, skb);
969 }
970
971 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
972 return 0;
973 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree