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iwlwifi: do not set the sequence control bit is not needed
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
blobdf1540ca6102f641ed491cd50899e5eec17b8963
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-io.h"
39 #include "iwl-agn-hw.h"
40 #include "iwl-agn.h"
41 #include "iwl-trans.h"
42
43 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
44 struct ieee80211_tx_info *info,
45 __le16 fc, __le32 *tx_flags)
46 {
47 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
48 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
49 info->flags & IEEE80211_TX_CTL_AMPDU)
50 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
51 }
52
53 /*
54 * handle build REPLY_TX command notification.
55 */
56 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
57 struct sk_buff *skb,
58 struct iwl_tx_cmd *tx_cmd,
59 struct ieee80211_tx_info *info,
60 struct ieee80211_hdr *hdr, u8 sta_id)
61 {
62 __le16 fc = hdr->frame_control;
63 __le32 tx_flags = tx_cmd->tx_flags;
64
65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
66
67 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
68 tx_flags |= TX_CMD_FLG_ACK_MSK;
69 else
70 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
71
72 if (ieee80211_is_probe_resp(fc))
73 tx_flags |= TX_CMD_FLG_TSF_MSK;
74 else if (ieee80211_is_back_req(fc))
75 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
76 else if (info->band == IEEE80211_BAND_2GHZ &&
77 priv->cfg->bt_params &&
78 priv->cfg->bt_params->advanced_bt_coexist &&
79 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
80 ieee80211_is_reassoc_req(fc) ||
81 skb->protocol == cpu_to_be16(ETH_P_PAE)))
82 tx_flags |= TX_CMD_FLG_IGNORE_BT;
83
84
85 tx_cmd->sta_id = sta_id;
86 if (ieee80211_has_morefrags(fc))
87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
88
89 if (ieee80211_is_data_qos(fc)) {
90 u8 *qc = ieee80211_get_qos_ctl(hdr);
91 tx_cmd->tid_tspec = qc[0] & 0xf;
92 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
93 } else {
94 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
95 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
96 else
97 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
98 }
99
100 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
101
102 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
103 if (ieee80211_is_mgmt(fc)) {
104 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
105 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
106 else
107 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
108 } else {
109 tx_cmd->timeout.pm_frame_timeout = 0;
110 }
111
112 tx_cmd->driver_txop = 0;
113 tx_cmd->tx_flags = tx_flags;
114 tx_cmd->next_frame_len = 0;
115 }
116
117 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
118 struct iwl_tx_cmd *tx_cmd,
119 struct ieee80211_tx_info *info,
120 __le16 fc)
121 {
122 u32 rate_flags;
123 int rate_idx;
124 u8 rts_retry_limit;
125 u8 data_retry_limit;
126 u8 rate_plcp;
127
128 if (priv->shrd->wowlan) {
129 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
130 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
131 } else {
132 /* Set retry limit on RTS packets */
133 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
134
135 /* Set retry limit on DATA packets and Probe Responses*/
136 if (ieee80211_is_probe_resp(fc)) {
137 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
138 rts_retry_limit =
139 min(data_retry_limit, rts_retry_limit);
140 } else if (ieee80211_is_back_req(fc))
141 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
142 else
143 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
144 }
145
146 tx_cmd->data_retry_limit = data_retry_limit;
147 tx_cmd->rts_retry_limit = rts_retry_limit;
148
149 /* DATA packets will use the uCode station table for rate/antenna
150 * selection */
151 if (ieee80211_is_data(fc)) {
152 tx_cmd->initial_rate_index = 0;
153 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
154 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
155 if (priv->tm_fixed_rate) {
156 /*
157 * rate overwrite by testmode
158 * we not only send lq command to change rate
159 * we also re-enforce per data pkt base.
160 */
161 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
162 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
163 sizeof(tx_cmd->rate_n_flags));
164 }
165 #endif
166 return;
167 }
168
169 /**
170 * If the current TX rate stored in mac80211 has the MCS bit set, it's
171 * not really a TX rate. Thus, we use the lowest supported rate for
172 * this band. Also use the lowest supported rate if the stored rate
173 * index is invalid.
174 */
175 rate_idx = info->control.rates[0].idx;
176 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
177 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
178 rate_idx = rate_lowest_index(&priv->bands[info->band],
179 info->control.sta);
180 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
181 if (info->band == IEEE80211_BAND_5GHZ)
182 rate_idx += IWL_FIRST_OFDM_RATE;
183 /* Get PLCP rate for tx_cmd->rate_n_flags */
184 rate_plcp = iwl_rates[rate_idx].plcp;
185 /* Zero out flags for this packet */
186 rate_flags = 0;
187
188 /* Set CCK flag as needed */
189 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
190 rate_flags |= RATE_MCS_CCK_MSK;
191
192 /* Set up antennas */
193 if (priv->cfg->bt_params &&
194 priv->cfg->bt_params->advanced_bt_coexist &&
195 priv->bt_full_concurrent) {
196 /* operated as 1x1 in full concurrency mode */
197 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
198 first_antenna(hw_params(priv).valid_tx_ant));
199 } else
200 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
201 hw_params(priv).valid_tx_ant);
202 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
203
204 /* Set the rate in the TX cmd */
205 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
206 }
207
208 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
209 struct ieee80211_tx_info *info,
210 struct iwl_tx_cmd *tx_cmd,
211 struct sk_buff *skb_frag,
212 int sta_id)
213 {
214 struct ieee80211_key_conf *keyconf = info->control.hw_key;
215
216 switch (keyconf->cipher) {
217 case WLAN_CIPHER_SUITE_CCMP:
218 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
219 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
220 if (info->flags & IEEE80211_TX_CTL_AMPDU)
221 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
222 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
223 break;
224
225 case WLAN_CIPHER_SUITE_TKIP:
226 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
227 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
228 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
229 break;
230
231 case WLAN_CIPHER_SUITE_WEP104:
232 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
233 /* fall through */
234 case WLAN_CIPHER_SUITE_WEP40:
235 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
236 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
237
238 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
239
240 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
241 "with key %d\n", keyconf->keyidx);
242 break;
243
244 default:
245 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
246 break;
247 }
248 }
249
250 /*
251 * start REPLY_TX command process
252 */
253 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
254 {
255 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
256 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
257 struct iwl_station_priv *sta_priv = NULL;
258 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
259 struct iwl_device_cmd *dev_cmd = NULL;
260 struct iwl_tx_cmd *tx_cmd;
261
262 __le16 fc;
263 u8 hdr_len;
264 u16 len;
265 u8 sta_id;
266 unsigned long flags;
267 bool is_agg = false;
268
269 if (info->control.vif)
270 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
271
272 spin_lock_irqsave(&priv->shrd->lock, flags);
273 if (iwl_is_rfkill(priv->shrd)) {
274 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
275 goto drop_unlock_priv;
276 }
277
278 fc = hdr->frame_control;
279
280 #ifdef CONFIG_IWLWIFI_DEBUG
281 if (ieee80211_is_auth(fc))
282 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
283 else if (ieee80211_is_assoc_req(fc))
284 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
285 else if (ieee80211_is_reassoc_req(fc))
286 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
287 #endif
288
289 hdr_len = ieee80211_hdrlen(fc);
290
291 /* For management frames use broadcast id to do not break aggregation */
292 if (!ieee80211_is_data(fc))
293 sta_id = ctx->bcast_sta_id;
294 else {
295 /* Find index into station table for destination station */
296 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
297 if (sta_id == IWL_INVALID_STATION) {
298 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
299 hdr->addr1);
300 goto drop_unlock_priv;
301 }
302 }
303
304 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
305
306 if (info->control.sta)
307 sta_priv = (void *)info->control.sta->drv_priv;
308
309 if (sta_priv && sta_priv->asleep &&
310 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
311 /*
312 * This sends an asynchronous command to the device,
313 * but we can rely on it being processed before the
314 * next frame is processed -- and the next frame to
315 * this station is the one that will consume this
316 * counter.
317 * For now set the counter to just 1 since we do not
318 * support uAPSD yet.
319 */
320 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
321 }
322
323 if (info->flags & IEEE80211_TX_CTL_AMPDU)
324 is_agg = true;
325
326 /* irqs already disabled/saved above when locking priv->shrd->lock */
327 spin_lock(&priv->shrd->sta_lock);
328
329 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
330
331 if (unlikely(!dev_cmd))
332 goto drop_unlock_sta;
333
334 memset(dev_cmd, 0, sizeof(*dev_cmd));
335 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
336
337 /* Total # bytes to be transmitted */
338 len = (u16)skb->len;
339 tx_cmd->len = cpu_to_le16(len);
340
341 if (info->control.hw_key)
342 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
343
344 /* TODO need this for burst mode later on */
345 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
346 iwl_dbg_log_tx_data_frame(priv, len, hdr);
347
348 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
349
350 iwl_update_stats(priv, true, fc, len);
351
352 memset(&info->status, 0, sizeof(info->status));
353
354 info->driver_data[0] = ctx;
355 info->driver_data[1] = dev_cmd;
356
357 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
358 goto drop_unlock_sta;
359
360 spin_unlock(&priv->shrd->sta_lock);
361 spin_unlock_irqrestore(&priv->shrd->lock, flags);
362
363 /*
364 * Avoid atomic ops if it isn't an associated client.
365 * Also, if this is a packet for aggregation, don't
366 * increase the counter because the ucode will stop
367 * aggregation queues when their respective station
368 * goes to sleep.
369 */
370 if (sta_priv && sta_priv->client && !is_agg)
371 atomic_inc(&sta_priv->pending_frames);
372
373 return 0;
374
375 drop_unlock_sta:
376 if (dev_cmd)
377 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
378 spin_unlock(&priv->shrd->sta_lock);
379 drop_unlock_priv:
380 spin_unlock_irqrestore(&priv->shrd->lock, flags);
381 return -1;
382 }
383
384 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
385 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
386 {
387 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
388 int sta_id;
389 int ret;
390
391 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
392 sta->addr, tid);
393
394 sta_id = iwl_sta_id(sta);
395 if (sta_id == IWL_INVALID_STATION) {
396 IWL_ERR(priv, "Start AGG on invalid station\n");
397 return -ENXIO;
398 }
399 if (unlikely(tid >= IWL_MAX_TID_COUNT))
400 return -EINVAL;
401
402 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
403 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
404 return -ENXIO;
405 }
406
407 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
408 if (ret)
409 return ret;
410
411 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
412 tid, ssn);
413
414 return ret;
415 }
416
417 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
418 struct ieee80211_sta *sta, u16 tid)
419 {
420 int sta_id;
421 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
422
423 sta_id = iwl_sta_id(sta);
424
425 if (sta_id == IWL_INVALID_STATION) {
426 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
427 return -ENXIO;
428 }
429
430 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
431 sta_id, tid);
432 }
433
434 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
435 struct iwl_rxon_context *ctx,
436 const u8 *addr1)
437 {
438 struct ieee80211_sta *sta;
439 struct iwl_station_priv *sta_priv;
440
441 rcu_read_lock();
442 sta = ieee80211_find_sta(ctx->vif, addr1);
443 if (sta) {
444 sta_priv = (void *)sta->drv_priv;
445 /* avoid atomic ops if this isn't a client */
446 if (sta_priv->client &&
447 atomic_dec_return(&sta_priv->pending_frames) == 0)
448 ieee80211_sta_block_awake(priv->hw, sta, false);
449 }
450 rcu_read_unlock();
451 }
452
453 /**
454 * translate ucode response to mac80211 tx status control values
455 */
456 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
457 struct ieee80211_tx_info *info)
458 {
459 struct ieee80211_tx_rate *r = &info->control.rates[0];
460
461 info->antenna_sel_tx =
462 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
463 if (rate_n_flags & RATE_MCS_HT_MSK)
464 r->flags |= IEEE80211_TX_RC_MCS;
465 if (rate_n_flags & RATE_MCS_GF_MSK)
466 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
467 if (rate_n_flags & RATE_MCS_HT40_MSK)
468 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
469 if (rate_n_flags & RATE_MCS_DUP_MSK)
470 r->flags |= IEEE80211_TX_RC_DUP_DATA;
471 if (rate_n_flags & RATE_MCS_SGI_MSK)
472 r->flags |= IEEE80211_TX_RC_SHORT_GI;
473 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
474 }
475
476 #ifdef CONFIG_IWLWIFI_DEBUG
477 const char *iwl_get_tx_fail_reason(u32 status)
478 {
479 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
480 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
481
482 switch (status & TX_STATUS_MSK) {
483 case TX_STATUS_SUCCESS:
484 return "SUCCESS";
485 TX_STATUS_POSTPONE(DELAY);
486 TX_STATUS_POSTPONE(FEW_BYTES);
487 TX_STATUS_POSTPONE(BT_PRIO);
488 TX_STATUS_POSTPONE(QUIET_PERIOD);
489 TX_STATUS_POSTPONE(CALC_TTAK);
490 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
491 TX_STATUS_FAIL(SHORT_LIMIT);
492 TX_STATUS_FAIL(LONG_LIMIT);
493 TX_STATUS_FAIL(FIFO_UNDERRUN);
494 TX_STATUS_FAIL(DRAIN_FLOW);
495 TX_STATUS_FAIL(RFKILL_FLUSH);
496 TX_STATUS_FAIL(LIFE_EXPIRE);
497 TX_STATUS_FAIL(DEST_PS);
498 TX_STATUS_FAIL(HOST_ABORTED);
499 TX_STATUS_FAIL(BT_RETRY);
500 TX_STATUS_FAIL(STA_INVALID);
501 TX_STATUS_FAIL(FRAG_DROPPED);
502 TX_STATUS_FAIL(TID_DISABLE);
503 TX_STATUS_FAIL(FIFO_FLUSHED);
504 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
505 TX_STATUS_FAIL(PASSIVE_NO_RX);
506 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
507 }
508
509 return "UNKNOWN";
510
511 #undef TX_STATUS_FAIL
512 #undef TX_STATUS_POSTPONE
513 }
514 #endif /* CONFIG_IWLWIFI_DEBUG */
515
516 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
517 {
518 status &= AGG_TX_STATUS_MSK;
519
520 switch (status) {
521 case AGG_TX_STATE_UNDERRUN_MSK:
522 priv->reply_agg_tx_stats.underrun++;
523 break;
524 case AGG_TX_STATE_BT_PRIO_MSK:
525 priv->reply_agg_tx_stats.bt_prio++;
526 break;
527 case AGG_TX_STATE_FEW_BYTES_MSK:
528 priv->reply_agg_tx_stats.few_bytes++;
529 break;
530 case AGG_TX_STATE_ABORT_MSK:
531 priv->reply_agg_tx_stats.abort++;
532 break;
533 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
534 priv->reply_agg_tx_stats.last_sent_ttl++;
535 break;
536 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
537 priv->reply_agg_tx_stats.last_sent_try++;
538 break;
539 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
540 priv->reply_agg_tx_stats.last_sent_bt_kill++;
541 break;
542 case AGG_TX_STATE_SCD_QUERY_MSK:
543 priv->reply_agg_tx_stats.scd_query++;
544 break;
545 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
546 priv->reply_agg_tx_stats.bad_crc32++;
547 break;
548 case AGG_TX_STATE_RESPONSE_MSK:
549 priv->reply_agg_tx_stats.response++;
550 break;
551 case AGG_TX_STATE_DUMP_TX_MSK:
552 priv->reply_agg_tx_stats.dump_tx++;
553 break;
554 case AGG_TX_STATE_DELAY_TX_MSK:
555 priv->reply_agg_tx_stats.delay_tx++;
556 break;
557 default:
558 priv->reply_agg_tx_stats.unknown++;
559 break;
560 }
561 }
562
563 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
564 struct iwlagn_tx_resp *tx_resp)
565 {
566 struct agg_tx_status *frame_status = &tx_resp->status;
567 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
568 IWLAGN_TX_RES_TID_POS;
569 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
570 IWLAGN_TX_RES_RA_POS;
571 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
572 u32 status = le16_to_cpu(tx_resp->status.status);
573 int i;
574
575 if (agg->wait_for_ba)
576 IWL_DEBUG_TX_REPLY(priv,
577 "got tx response w/o block-ack\n");
578
579 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
580 agg->wait_for_ba = (tx_resp->frame_count > 1);
581
582 /*
583 * If the BT kill count is non-zero, we'll get this
584 * notification again.
585 */
586 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
587 priv->cfg->bt_params &&
588 priv->cfg->bt_params->advanced_bt_coexist) {
589 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
590 }
591
592 if (tx_resp->frame_count == 1)
593 return;
594
595 /* Construct bit-map of pending frames within Tx window */
596 for (i = 0; i < tx_resp->frame_count; i++) {
597 u16 fstatus = le16_to_cpu(frame_status[i].status);
598
599 if (status & AGG_TX_STATUS_MSK)
600 iwlagn_count_agg_tx_err_status(priv, fstatus);
601
602 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
603 AGG_TX_STATE_ABORT_MSK))
604 continue;
605
606 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
607 "try-count (0x%08x)\n",
608 iwl_get_agg_tx_fail_reason(fstatus),
609 fstatus & AGG_TX_STATUS_MSK,
610 fstatus & AGG_TX_TRY_MSK);
611 }
612 }
613
614 #ifdef CONFIG_IWLWIFI_DEBUG
615 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
616
617 const char *iwl_get_agg_tx_fail_reason(u16 status)
618 {
619 status &= AGG_TX_STATUS_MSK;
620 switch (status) {
621 case AGG_TX_STATE_TRANSMITTED:
622 return "SUCCESS";
623 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
624 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
625 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
626 AGG_TX_STATE_FAIL(ABORT_MSK);
627 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
628 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
629 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
630 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
631 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
632 AGG_TX_STATE_FAIL(RESPONSE_MSK);
633 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
634 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
635 }
636
637 return "UNKNOWN";
638 }
639 #endif /* CONFIG_IWLWIFI_DEBUG */
640
641 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
642 {
643 return le32_to_cpup((__le32 *)&tx_resp->status +
644 tx_resp->frame_count) & MAX_SN;
645 }
646
647 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
648 {
649 status &= TX_STATUS_MSK;
650
651 switch (status) {
652 case TX_STATUS_POSTPONE_DELAY:
653 priv->reply_tx_stats.pp_delay++;
654 break;
655 case TX_STATUS_POSTPONE_FEW_BYTES:
656 priv->reply_tx_stats.pp_few_bytes++;
657 break;
658 case TX_STATUS_POSTPONE_BT_PRIO:
659 priv->reply_tx_stats.pp_bt_prio++;
660 break;
661 case TX_STATUS_POSTPONE_QUIET_PERIOD:
662 priv->reply_tx_stats.pp_quiet_period++;
663 break;
664 case TX_STATUS_POSTPONE_CALC_TTAK:
665 priv->reply_tx_stats.pp_calc_ttak++;
666 break;
667 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
668 priv->reply_tx_stats.int_crossed_retry++;
669 break;
670 case TX_STATUS_FAIL_SHORT_LIMIT:
671 priv->reply_tx_stats.short_limit++;
672 break;
673 case TX_STATUS_FAIL_LONG_LIMIT:
674 priv->reply_tx_stats.long_limit++;
675 break;
676 case TX_STATUS_FAIL_FIFO_UNDERRUN:
677 priv->reply_tx_stats.fifo_underrun++;
678 break;
679 case TX_STATUS_FAIL_DRAIN_FLOW:
680 priv->reply_tx_stats.drain_flow++;
681 break;
682 case TX_STATUS_FAIL_RFKILL_FLUSH:
683 priv->reply_tx_stats.rfkill_flush++;
684 break;
685 case TX_STATUS_FAIL_LIFE_EXPIRE:
686 priv->reply_tx_stats.life_expire++;
687 break;
688 case TX_STATUS_FAIL_DEST_PS:
689 priv->reply_tx_stats.dest_ps++;
690 break;
691 case TX_STATUS_FAIL_HOST_ABORTED:
692 priv->reply_tx_stats.host_abort++;
693 break;
694 case TX_STATUS_FAIL_BT_RETRY:
695 priv->reply_tx_stats.bt_retry++;
696 break;
697 case TX_STATUS_FAIL_STA_INVALID:
698 priv->reply_tx_stats.sta_invalid++;
699 break;
700 case TX_STATUS_FAIL_FRAG_DROPPED:
701 priv->reply_tx_stats.frag_drop++;
702 break;
703 case TX_STATUS_FAIL_TID_DISABLE:
704 priv->reply_tx_stats.tid_disable++;
705 break;
706 case TX_STATUS_FAIL_FIFO_FLUSHED:
707 priv->reply_tx_stats.fifo_flush++;
708 break;
709 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
710 priv->reply_tx_stats.insuff_cf_poll++;
711 break;
712 case TX_STATUS_FAIL_PASSIVE_NO_RX:
713 priv->reply_tx_stats.fail_hw_drop++;
714 break;
715 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
716 priv->reply_tx_stats.sta_color_mismatch++;
717 break;
718 default:
719 priv->reply_tx_stats.unknown++;
720 break;
721 }
722 }
723
724 static void iwlagn_set_tx_status(struct iwl_priv *priv,
725 struct ieee80211_tx_info *info,
726 struct iwlagn_tx_resp *tx_resp,
727 bool is_agg)
728 {
729 u16 status = le16_to_cpu(tx_resp->status.status);
730
731 info->status.rates[0].count = tx_resp->failure_frame + 1;
732 if (is_agg)
733 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
734 info->flags |= iwl_tx_status_to_mac80211(status);
735 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
736 info);
737 if (!iwl_is_tx_success(status))
738 iwlagn_count_tx_err_status(priv, status);
739 }
740
741 static void iwl_check_abort_status(struct iwl_priv *priv,
742 u8 frame_count, u32 status)
743 {
744 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
745 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
746 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
747 queue_work(priv->shrd->workqueue, &priv->tx_flush);
748 }
749 }
750
751 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
752 struct iwl_device_cmd *cmd)
753 {
754 struct iwl_rx_packet *pkt = rxb_addr(rxb);
755 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
756 int txq_id = SEQ_TO_QUEUE(sequence);
757 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
758 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
759 struct ieee80211_hdr *hdr;
760 u32 status = le16_to_cpu(tx_resp->status.status);
761 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
762 int tid;
763 int sta_id;
764 int freed;
765 struct ieee80211_tx_info *info;
766 unsigned long flags;
767 struct sk_buff_head skbs;
768 struct sk_buff *skb;
769 struct iwl_rxon_context *ctx;
770 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
771
772 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
773 IWLAGN_TX_RES_TID_POS;
774 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
775 IWLAGN_TX_RES_RA_POS;
776
777 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
778
779 if (is_agg)
780 iwl_rx_reply_tx_agg(priv, tx_resp);
781
782 if (tx_resp->frame_count == 1) {
783 __skb_queue_head_init(&skbs);
784 /*we can free until ssn % q.n_bd not inclusive */
785 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
786 ssn, status, &skbs);
787 freed = 0;
788 while (!skb_queue_empty(&skbs)) {
789 skb = __skb_dequeue(&skbs);
790 hdr = (struct ieee80211_hdr *)skb->data;
791
792 if (!ieee80211_is_data_qos(hdr->frame_control))
793 priv->last_seq_ctl = tx_resp->seq_ctl;
794
795 info = IEEE80211_SKB_CB(skb);
796 ctx = info->driver_data[0];
797 kmem_cache_free(priv->tx_cmd_pool,
798 (info->driver_data[1]));
799
800 memset(&info->status, 0, sizeof(info->status));
801
802 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
803 iwl_is_associated_ctx(ctx) && ctx->vif &&
804 ctx->vif->type == NL80211_IFTYPE_STATION) {
805 ctx->last_tx_rejected = true;
806 iwl_trans_stop_queue(trans(priv), txq_id);
807
808 IWL_DEBUG_TX_REPLY(priv,
809 "TXQ %d status %s (0x%08x) "
810 "rate_n_flags 0x%x retries %d\n",
811 txq_id,
812 iwl_get_tx_fail_reason(status),
813 status,
814 le32_to_cpu(tx_resp->rate_n_flags),
815 tx_resp->failure_frame);
816
817 IWL_DEBUG_TX_REPLY(priv,
818 "FrameCnt = %d, idx=%d\n",
819 tx_resp->frame_count, cmd_index);
820 }
821
822 /* check if BAR is needed */
823 if (is_agg && !iwl_is_tx_success(status))
824 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
825 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
826 tx_resp, is_agg);
827 if (!is_agg)
828 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
829
830 ieee80211_tx_status_irqsafe(priv->hw, skb);
831
832 freed++;
833 }
834
835 WARN_ON(!is_agg && freed != 1);
836 }
837
838 iwl_check_abort_status(priv, tx_resp->frame_count, status);
839 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
840 return 0;
841 }
842
843 /**
844 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
845 *
846 * Handles block-acknowledge notification from device, which reports success
847 * of frames sent via aggregation.
848 */
849 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
850 struct iwl_rx_mem_buffer *rxb,
851 struct iwl_device_cmd *cmd)
852 {
853 struct iwl_rx_packet *pkt = rxb_addr(rxb);
854 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
855 struct iwl_ht_agg *agg;
856 struct sk_buff_head reclaimed_skbs;
857 struct ieee80211_tx_info *info;
858 struct ieee80211_hdr *hdr;
859 struct sk_buff *skb;
860 unsigned long flags;
861 int sta_id;
862 int tid;
863 int freed;
864
865 /* "flow" corresponds to Tx queue */
866 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
867
868 /* "ssn" is start of block-ack Tx window, corresponds to index
869 * (in Tx queue's circular buffer) of first TFD/frame in window */
870 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
871
872 if (scd_flow >= hw_params(priv).max_txq_num) {
873 IWL_ERR(priv,
874 "BUG_ON scd_flow is bigger than number of queues\n");
875 return 0;
876 }
877
878 sta_id = ba_resp->sta_id;
879 tid = ba_resp->tid;
880 agg = &priv->shrd->tid_data[sta_id][tid].agg;
881
882 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
883
884 if (unlikely(agg->txq_id != scd_flow)) {
885 /*
886 * FIXME: this is a uCode bug which need to be addressed,
887 * log the information and return for now!
888 * since it is possible happen very often and in order
889 * not to fill the syslog, don't enable the logging by default
890 */
891 IWL_DEBUG_TX_REPLY(priv,
892 "BA scd_flow %d does not match txq_id %d\n",
893 scd_flow, agg->txq_id);
894 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
895 return 0;
896 }
897
898 if (unlikely(!agg->wait_for_ba)) {
899 if (unlikely(ba_resp->bitmap))
900 IWL_ERR(priv, "Received BA when not expected\n");
901 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
902 return 0;
903 }
904
905 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
906 "sta_id = %d\n",
907 agg->wait_for_ba,
908 (u8 *) &ba_resp->sta_addr_lo32,
909 ba_resp->sta_id);
910 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
911 "scd_flow = %d, scd_ssn = %d\n",
912 ba_resp->tid,
913 ba_resp->seq_ctl,
914 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
915 ba_resp->scd_flow,
916 ba_resp->scd_ssn);
917
918 /* Mark that the expected block-ack response arrived */
919 agg->wait_for_ba = false;
920
921 /* Sanity check values reported by uCode */
922 if (ba_resp->txed_2_done > ba_resp->txed) {
923 IWL_DEBUG_TX_REPLY(priv,
924 "bogus sent(%d) and ack(%d) count\n",
925 ba_resp->txed, ba_resp->txed_2_done);
926 /*
927 * set txed_2_done = txed,
928 * so it won't impact rate scale
929 */
930 ba_resp->txed = ba_resp->txed_2_done;
931 }
932 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
933 ba_resp->txed, ba_resp->txed_2_done);
934
935 __skb_queue_head_init(&reclaimed_skbs);
936
937 /* Release all TFDs before the SSN, i.e. all TFDs in front of
938 * block-ack window (we assume that they've been successfully
939 * transmitted ... if not, it's too late anyway). */
940 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
941 0, &reclaimed_skbs);
942 freed = 0;
943 while (!skb_queue_empty(&reclaimed_skbs)) {
944
945 skb = __skb_dequeue(&reclaimed_skbs);
946 hdr = (struct ieee80211_hdr *)skb->data;
947
948 if (ieee80211_is_data_qos(hdr->frame_control))
949 freed++;
950 else
951 WARN_ON_ONCE(1);
952
953 info = IEEE80211_SKB_CB(skb);
954 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
955
956 if (freed == 1) {
957 /* this is the first skb we deliver in this batch */
958 /* put the rate scaling data there */
959 info = IEEE80211_SKB_CB(skb);
960 memset(&info->status, 0, sizeof(info->status));
961 info->flags |= IEEE80211_TX_STAT_ACK;
962 info->flags |= IEEE80211_TX_STAT_AMPDU;
963 info->status.ampdu_ack_len = ba_resp->txed_2_done;
964 info->status.ampdu_len = ba_resp->txed;
965 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
966 info);
967 }
968
969 ieee80211_tx_status_irqsafe(priv->hw, skb);
970 }
971
972 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
973 return 0;
974 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree