?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlagn: merge station management functions
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
blobd7e48f2627019a89c2e08bf39a75600666d3dc6b
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-helpers.h"
40 #include "iwl-agn-hw.h"
41 #include "iwl-agn.h"
42 #include "iwl-trans.h"
43
44 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
45 struct ieee80211_tx_info *info,
46 __le16 fc, __le32 *tx_flags)
47 {
48 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
49 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
50 info->flags & IEEE80211_TX_CTL_AMPDU)
51 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
52 }
53
54 /*
55 * handle build REPLY_TX command notification.
56 */
57 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
58 struct sk_buff *skb,
59 struct iwl_tx_cmd *tx_cmd,
60 struct ieee80211_tx_info *info,
61 struct ieee80211_hdr *hdr, u8 sta_id)
62 {
63 __le16 fc = hdr->frame_control;
64 __le32 tx_flags = tx_cmd->tx_flags;
65
66 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
67
68 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
69 tx_flags |= TX_CMD_FLG_ACK_MSK;
70 else
71 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
72
73 if (ieee80211_is_probe_resp(fc))
74 tx_flags |= TX_CMD_FLG_TSF_MSK;
75 else if (ieee80211_is_back_req(fc))
76 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
77 else if (info->band == IEEE80211_BAND_2GHZ &&
78 priv->cfg->bt_params &&
79 priv->cfg->bt_params->advanced_bt_coexist &&
80 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
81 ieee80211_is_reassoc_req(fc) ||
82 skb->protocol == cpu_to_be16(ETH_P_PAE)))
83 tx_flags |= TX_CMD_FLG_IGNORE_BT;
84
85
86 tx_cmd->sta_id = sta_id;
87 if (ieee80211_has_morefrags(fc))
88 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
89
90 if (ieee80211_is_data_qos(fc)) {
91 u8 *qc = ieee80211_get_qos_ctl(hdr);
92 tx_cmd->tid_tspec = qc[0] & 0xf;
93 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
94 } else {
95 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
96 }
97
98 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
99
100 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
101 if (ieee80211_is_mgmt(fc)) {
102 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
103 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
104 else
105 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
106 } else {
107 tx_cmd->timeout.pm_frame_timeout = 0;
108 }
109
110 tx_cmd->driver_txop = 0;
111 tx_cmd->tx_flags = tx_flags;
112 tx_cmd->next_frame_len = 0;
113 }
114
115 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
116 struct iwl_tx_cmd *tx_cmd,
117 struct ieee80211_tx_info *info,
118 __le16 fc)
119 {
120 u32 rate_flags;
121 int rate_idx;
122 u8 rts_retry_limit;
123 u8 data_retry_limit;
124 u8 rate_plcp;
125
126 if (priv->shrd->wowlan) {
127 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
128 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
129 } else {
130 /* Set retry limit on RTS packets */
131 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
132
133 /* Set retry limit on DATA packets and Probe Responses*/
134 if (ieee80211_is_probe_resp(fc)) {
135 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
136 rts_retry_limit =
137 min(data_retry_limit, rts_retry_limit);
138 } else if (ieee80211_is_back_req(fc))
139 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
140 else
141 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
142 }
143
144 tx_cmd->data_retry_limit = data_retry_limit;
145 tx_cmd->rts_retry_limit = rts_retry_limit;
146
147 /* DATA packets will use the uCode station table for rate/antenna
148 * selection */
149 if (ieee80211_is_data(fc)) {
150 tx_cmd->initial_rate_index = 0;
151 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
152 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
153 if (priv->tm_fixed_rate) {
154 /*
155 * rate overwrite by testmode
156 * we not only send lq command to change rate
157 * we also re-enforce per data pkt base.
158 */
159 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
160 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
161 sizeof(tx_cmd->rate_n_flags));
162 }
163 #endif
164 return;
165 }
166
167 /**
168 * If the current TX rate stored in mac80211 has the MCS bit set, it's
169 * not really a TX rate. Thus, we use the lowest supported rate for
170 * this band. Also use the lowest supported rate if the stored rate
171 * index is invalid.
172 */
173 rate_idx = info->control.rates[0].idx;
174 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
175 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
176 rate_idx = rate_lowest_index(&priv->bands[info->band],
177 info->control.sta);
178 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
179 if (info->band == IEEE80211_BAND_5GHZ)
180 rate_idx += IWL_FIRST_OFDM_RATE;
181 /* Get PLCP rate for tx_cmd->rate_n_flags */
182 rate_plcp = iwl_rates[rate_idx].plcp;
183 /* Zero out flags for this packet */
184 rate_flags = 0;
185
186 /* Set CCK flag as needed */
187 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
188 rate_flags |= RATE_MCS_CCK_MSK;
189
190 /* Set up antennas */
191 if (priv->cfg->bt_params &&
192 priv->cfg->bt_params->advanced_bt_coexist &&
193 priv->bt_full_concurrent) {
194 /* operated as 1x1 in full concurrency mode */
195 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
196 first_antenna(hw_params(priv).valid_tx_ant));
197 } else
198 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
199 hw_params(priv).valid_tx_ant);
200 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
201
202 /* Set the rate in the TX cmd */
203 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
204 }
205
206 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
207 struct ieee80211_tx_info *info,
208 struct iwl_tx_cmd *tx_cmd,
209 struct sk_buff *skb_frag,
210 int sta_id)
211 {
212 struct ieee80211_key_conf *keyconf = info->control.hw_key;
213
214 switch (keyconf->cipher) {
215 case WLAN_CIPHER_SUITE_CCMP:
216 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
217 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
218 if (info->flags & IEEE80211_TX_CTL_AMPDU)
219 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
220 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
221 break;
222
223 case WLAN_CIPHER_SUITE_TKIP:
224 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
225 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
226 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
227 break;
228
229 case WLAN_CIPHER_SUITE_WEP104:
230 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
231 /* fall through */
232 case WLAN_CIPHER_SUITE_WEP40:
233 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
234 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
235
236 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
237
238 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
239 "with key %d\n", keyconf->keyidx);
240 break;
241
242 default:
243 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
244 break;
245 }
246 }
247
248 /*
249 * start REPLY_TX command process
250 */
251 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
252 {
253 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
254 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
255 struct iwl_station_priv *sta_priv = NULL;
256 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
257 struct iwl_device_cmd *dev_cmd = NULL;
258 struct iwl_tx_cmd *tx_cmd;
259
260 __le16 fc;
261 u8 hdr_len;
262 u16 len;
263 u8 sta_id;
264 unsigned long flags;
265 bool is_agg = false;
266
267 if (info->control.vif)
268 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
269
270 spin_lock_irqsave(&priv->shrd->lock, flags);
271 if (iwl_is_rfkill(priv->shrd)) {
272 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
273 goto drop_unlock_priv;
274 }
275
276 fc = hdr->frame_control;
277
278 #ifdef CONFIG_IWLWIFI_DEBUG
279 if (ieee80211_is_auth(fc))
280 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
281 else if (ieee80211_is_assoc_req(fc))
282 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
283 else if (ieee80211_is_reassoc_req(fc))
284 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
285 #endif
286
287 hdr_len = ieee80211_hdrlen(fc);
288
289 /* For management frames use broadcast id to do not break aggregation */
290 if (!ieee80211_is_data(fc))
291 sta_id = ctx->bcast_sta_id;
292 else {
293 /* Find index into station table for destination station */
294 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
295 if (sta_id == IWL_INVALID_STATION) {
296 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
297 hdr->addr1);
298 goto drop_unlock_priv;
299 }
300 }
301
302 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
303
304 if (info->control.sta)
305 sta_priv = (void *)info->control.sta->drv_priv;
306
307 if (sta_priv && sta_priv->asleep &&
308 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
309 /*
310 * This sends an asynchronous command to the device,
311 * but we can rely on it being processed before the
312 * next frame is processed -- and the next frame to
313 * this station is the one that will consume this
314 * counter.
315 * For now set the counter to just 1 since we do not
316 * support uAPSD yet.
317 */
318 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
319 }
320
321 if (info->flags & IEEE80211_TX_CTL_AMPDU)
322 is_agg = true;
323
324 /* irqs already disabled/saved above when locking priv->shrd->lock */
325 spin_lock(&priv->shrd->sta_lock);
326
327 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
328
329 if (unlikely(!dev_cmd))
330 goto drop_unlock_sta;
331
332 memset(dev_cmd, 0, sizeof(*dev_cmd));
333 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
334
335 /* Total # bytes to be transmitted */
336 len = (u16)skb->len;
337 tx_cmd->len = cpu_to_le16(len);
338
339 if (info->control.hw_key)
340 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
341
342 /* TODO need this for burst mode later on */
343 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
344 iwl_dbg_log_tx_data_frame(priv, len, hdr);
345
346 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
347
348 iwl_update_stats(priv, true, fc, len);
349
350 memset(&info->status, 0, sizeof(info->status));
351
352 info->driver_data[0] = ctx;
353 info->driver_data[1] = dev_cmd;
354
355 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
356 goto drop_unlock_sta;
357
358 spin_unlock(&priv->shrd->sta_lock);
359 spin_unlock_irqrestore(&priv->shrd->lock, flags);
360
361 /*
362 * Avoid atomic ops if it isn't an associated client.
363 * Also, if this is a packet for aggregation, don't
364 * increase the counter because the ucode will stop
365 * aggregation queues when their respective station
366 * goes to sleep.
367 */
368 if (sta_priv && sta_priv->client && !is_agg)
369 atomic_inc(&sta_priv->pending_frames);
370
371 return 0;
372
373 drop_unlock_sta:
374 if (dev_cmd)
375 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
376 spin_unlock(&priv->shrd->sta_lock);
377 drop_unlock_priv:
378 spin_unlock_irqrestore(&priv->shrd->lock, flags);
379 return -1;
380 }
381
382 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
383 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
384 {
385 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
386 int sta_id;
387 int ret;
388
389 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
390 sta->addr, tid);
391
392 sta_id = iwl_sta_id(sta);
393 if (sta_id == IWL_INVALID_STATION) {
394 IWL_ERR(priv, "Start AGG on invalid station\n");
395 return -ENXIO;
396 }
397 if (unlikely(tid >= IWL_MAX_TID_COUNT))
398 return -EINVAL;
399
400 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
401 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
402 return -ENXIO;
403 }
404
405 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
406 if (ret)
407 return ret;
408
409 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
410 tid, ssn);
411
412 return ret;
413 }
414
415 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
416 struct ieee80211_sta *sta, u16 tid)
417 {
418 int sta_id;
419 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
420
421 sta_id = iwl_sta_id(sta);
422
423 if (sta_id == IWL_INVALID_STATION) {
424 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
425 return -ENXIO;
426 }
427
428 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
429 sta_id, tid);
430 }
431
432 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
433 struct iwl_rxon_context *ctx,
434 const u8 *addr1)
435 {
436 struct ieee80211_sta *sta;
437 struct iwl_station_priv *sta_priv;
438
439 rcu_read_lock();
440 sta = ieee80211_find_sta(ctx->vif, addr1);
441 if (sta) {
442 sta_priv = (void *)sta->drv_priv;
443 /* avoid atomic ops if this isn't a client */
444 if (sta_priv->client &&
445 atomic_dec_return(&sta_priv->pending_frames) == 0)
446 ieee80211_sta_block_awake(priv->hw, sta, false);
447 }
448 rcu_read_unlock();
449 }
450
451 /**
452 * translate ucode response to mac80211 tx status control values
453 */
454 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
455 struct ieee80211_tx_info *info)
456 {
457 struct ieee80211_tx_rate *r = &info->control.rates[0];
458
459 info->antenna_sel_tx =
460 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
461 if (rate_n_flags & RATE_MCS_HT_MSK)
462 r->flags |= IEEE80211_TX_RC_MCS;
463 if (rate_n_flags & RATE_MCS_GF_MSK)
464 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
465 if (rate_n_flags & RATE_MCS_HT40_MSK)
466 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
467 if (rate_n_flags & RATE_MCS_DUP_MSK)
468 r->flags |= IEEE80211_TX_RC_DUP_DATA;
469 if (rate_n_flags & RATE_MCS_SGI_MSK)
470 r->flags |= IEEE80211_TX_RC_SHORT_GI;
471 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
472 }
473
474 #ifdef CONFIG_IWLWIFI_DEBUG
475 const char *iwl_get_tx_fail_reason(u32 status)
476 {
477 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
478 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
479
480 switch (status & TX_STATUS_MSK) {
481 case TX_STATUS_SUCCESS:
482 return "SUCCESS";
483 TX_STATUS_POSTPONE(DELAY);
484 TX_STATUS_POSTPONE(FEW_BYTES);
485 TX_STATUS_POSTPONE(BT_PRIO);
486 TX_STATUS_POSTPONE(QUIET_PERIOD);
487 TX_STATUS_POSTPONE(CALC_TTAK);
488 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
489 TX_STATUS_FAIL(SHORT_LIMIT);
490 TX_STATUS_FAIL(LONG_LIMIT);
491 TX_STATUS_FAIL(FIFO_UNDERRUN);
492 TX_STATUS_FAIL(DRAIN_FLOW);
493 TX_STATUS_FAIL(RFKILL_FLUSH);
494 TX_STATUS_FAIL(LIFE_EXPIRE);
495 TX_STATUS_FAIL(DEST_PS);
496 TX_STATUS_FAIL(HOST_ABORTED);
497 TX_STATUS_FAIL(BT_RETRY);
498 TX_STATUS_FAIL(STA_INVALID);
499 TX_STATUS_FAIL(FRAG_DROPPED);
500 TX_STATUS_FAIL(TID_DISABLE);
501 TX_STATUS_FAIL(FIFO_FLUSHED);
502 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
503 TX_STATUS_FAIL(PASSIVE_NO_RX);
504 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
505 }
506
507 return "UNKNOWN";
508
509 #undef TX_STATUS_FAIL
510 #undef TX_STATUS_POSTPONE
511 }
512 #endif /* CONFIG_IWLWIFI_DEBUG */
513
514 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
515 {
516 status &= AGG_TX_STATUS_MSK;
517
518 switch (status) {
519 case AGG_TX_STATE_UNDERRUN_MSK:
520 priv->reply_agg_tx_stats.underrun++;
521 break;
522 case AGG_TX_STATE_BT_PRIO_MSK:
523 priv->reply_agg_tx_stats.bt_prio++;
524 break;
525 case AGG_TX_STATE_FEW_BYTES_MSK:
526 priv->reply_agg_tx_stats.few_bytes++;
527 break;
528 case AGG_TX_STATE_ABORT_MSK:
529 priv->reply_agg_tx_stats.abort++;
530 break;
531 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
532 priv->reply_agg_tx_stats.last_sent_ttl++;
533 break;
534 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
535 priv->reply_agg_tx_stats.last_sent_try++;
536 break;
537 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
538 priv->reply_agg_tx_stats.last_sent_bt_kill++;
539 break;
540 case AGG_TX_STATE_SCD_QUERY_MSK:
541 priv->reply_agg_tx_stats.scd_query++;
542 break;
543 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
544 priv->reply_agg_tx_stats.bad_crc32++;
545 break;
546 case AGG_TX_STATE_RESPONSE_MSK:
547 priv->reply_agg_tx_stats.response++;
548 break;
549 case AGG_TX_STATE_DUMP_TX_MSK:
550 priv->reply_agg_tx_stats.dump_tx++;
551 break;
552 case AGG_TX_STATE_DELAY_TX_MSK:
553 priv->reply_agg_tx_stats.delay_tx++;
554 break;
555 default:
556 priv->reply_agg_tx_stats.unknown++;
557 break;
558 }
559 }
560
561 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
562 struct iwlagn_tx_resp *tx_resp)
563 {
564 struct agg_tx_status *frame_status = &tx_resp->status;
565 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
566 IWLAGN_TX_RES_TID_POS;
567 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
568 IWLAGN_TX_RES_RA_POS;
569 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
570 u32 status = le16_to_cpu(tx_resp->status.status);
571 int i;
572
573 if (agg->wait_for_ba)
574 IWL_DEBUG_TX_REPLY(priv,
575 "got tx response w/o block-ack\n");
576
577 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
578 agg->wait_for_ba = (tx_resp->frame_count > 1);
579
580 /*
581 * If the BT kill count is non-zero, we'll get this
582 * notification again.
583 */
584 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
585 priv->cfg->bt_params &&
586 priv->cfg->bt_params->advanced_bt_coexist) {
587 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
588 }
589
590 if (tx_resp->frame_count == 1)
591 return;
592
593 /* Construct bit-map of pending frames within Tx window */
594 for (i = 0; i < tx_resp->frame_count; i++) {
595 u16 fstatus = le16_to_cpu(frame_status[i].status);
596
597 if (status & AGG_TX_STATUS_MSK)
598 iwlagn_count_agg_tx_err_status(priv, fstatus);
599
600 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
601 AGG_TX_STATE_ABORT_MSK))
602 continue;
603
604 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
605 "try-count (0x%08x)\n",
606 iwl_get_agg_tx_fail_reason(fstatus),
607 fstatus & AGG_TX_STATUS_MSK,
608 fstatus & AGG_TX_TRY_MSK);
609 }
610 }
611
612 #ifdef CONFIG_IWLWIFI_DEBUG
613 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
614
615 const char *iwl_get_agg_tx_fail_reason(u16 status)
616 {
617 status &= AGG_TX_STATUS_MSK;
618 switch (status) {
619 case AGG_TX_STATE_TRANSMITTED:
620 return "SUCCESS";
621 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
622 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
623 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
624 AGG_TX_STATE_FAIL(ABORT_MSK);
625 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
626 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
627 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
628 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
629 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
630 AGG_TX_STATE_FAIL(RESPONSE_MSK);
631 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
632 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
633 }
634
635 return "UNKNOWN";
636 }
637 #endif /* CONFIG_IWLWIFI_DEBUG */
638
639 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
640 {
641 return le32_to_cpup((__le32 *)&tx_resp->status +
642 tx_resp->frame_count) & MAX_SN;
643 }
644
645 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
646 {
647 status &= TX_STATUS_MSK;
648
649 switch (status) {
650 case TX_STATUS_POSTPONE_DELAY:
651 priv->reply_tx_stats.pp_delay++;
652 break;
653 case TX_STATUS_POSTPONE_FEW_BYTES:
654 priv->reply_tx_stats.pp_few_bytes++;
655 break;
656 case TX_STATUS_POSTPONE_BT_PRIO:
657 priv->reply_tx_stats.pp_bt_prio++;
658 break;
659 case TX_STATUS_POSTPONE_QUIET_PERIOD:
660 priv->reply_tx_stats.pp_quiet_period++;
661 break;
662 case TX_STATUS_POSTPONE_CALC_TTAK:
663 priv->reply_tx_stats.pp_calc_ttak++;
664 break;
665 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
666 priv->reply_tx_stats.int_crossed_retry++;
667 break;
668 case TX_STATUS_FAIL_SHORT_LIMIT:
669 priv->reply_tx_stats.short_limit++;
670 break;
671 case TX_STATUS_FAIL_LONG_LIMIT:
672 priv->reply_tx_stats.long_limit++;
673 break;
674 case TX_STATUS_FAIL_FIFO_UNDERRUN:
675 priv->reply_tx_stats.fifo_underrun++;
676 break;
677 case TX_STATUS_FAIL_DRAIN_FLOW:
678 priv->reply_tx_stats.drain_flow++;
679 break;
680 case TX_STATUS_FAIL_RFKILL_FLUSH:
681 priv->reply_tx_stats.rfkill_flush++;
682 break;
683 case TX_STATUS_FAIL_LIFE_EXPIRE:
684 priv->reply_tx_stats.life_expire++;
685 break;
686 case TX_STATUS_FAIL_DEST_PS:
687 priv->reply_tx_stats.dest_ps++;
688 break;
689 case TX_STATUS_FAIL_HOST_ABORTED:
690 priv->reply_tx_stats.host_abort++;
691 break;
692 case TX_STATUS_FAIL_BT_RETRY:
693 priv->reply_tx_stats.bt_retry++;
694 break;
695 case TX_STATUS_FAIL_STA_INVALID:
696 priv->reply_tx_stats.sta_invalid++;
697 break;
698 case TX_STATUS_FAIL_FRAG_DROPPED:
699 priv->reply_tx_stats.frag_drop++;
700 break;
701 case TX_STATUS_FAIL_TID_DISABLE:
702 priv->reply_tx_stats.tid_disable++;
703 break;
704 case TX_STATUS_FAIL_FIFO_FLUSHED:
705 priv->reply_tx_stats.fifo_flush++;
706 break;
707 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
708 priv->reply_tx_stats.insuff_cf_poll++;
709 break;
710 case TX_STATUS_FAIL_PASSIVE_NO_RX:
711 priv->reply_tx_stats.fail_hw_drop++;
712 break;
713 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
714 priv->reply_tx_stats.sta_color_mismatch++;
715 break;
716 default:
717 priv->reply_tx_stats.unknown++;
718 break;
719 }
720 }
721
722 static void iwlagn_set_tx_status(struct iwl_priv *priv,
723 struct ieee80211_tx_info *info,
724 struct iwlagn_tx_resp *tx_resp,
725 bool is_agg)
726 {
727 u16 status = le16_to_cpu(tx_resp->status.status);
728
729 info->status.rates[0].count = tx_resp->failure_frame + 1;
730 if (is_agg)
731 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
732 info->flags |= iwl_tx_status_to_mac80211(status);
733 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
734 info);
735 if (!iwl_is_tx_success(status))
736 iwlagn_count_tx_err_status(priv, status);
737 }
738
739 static void iwl_check_abort_status(struct iwl_priv *priv,
740 u8 frame_count, u32 status)
741 {
742 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
743 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
744 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
745 queue_work(priv->shrd->workqueue, &priv->tx_flush);
746 }
747 }
748
749 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
750 struct iwl_device_cmd *cmd)
751 {
752 struct iwl_rx_packet *pkt = rxb_addr(rxb);
753 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
754 int txq_id = SEQ_TO_QUEUE(sequence);
755 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
756 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
757 struct ieee80211_hdr *hdr;
758 u32 status = le16_to_cpu(tx_resp->status.status);
759 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
760 int tid;
761 int sta_id;
762 int freed;
763 struct ieee80211_tx_info *info;
764 unsigned long flags;
765 struct sk_buff_head skbs;
766 struct sk_buff *skb;
767 struct iwl_rxon_context *ctx;
768 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
769
770 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
771 IWLAGN_TX_RES_TID_POS;
772 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
773 IWLAGN_TX_RES_RA_POS;
774
775 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
776
777 if (is_agg)
778 iwl_rx_reply_tx_agg(priv, tx_resp);
779
780 if (tx_resp->frame_count == 1) {
781 __skb_queue_head_init(&skbs);
782 /*we can free until ssn % q.n_bd not inclusive */
783 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
784 ssn, status, &skbs);
785 freed = 0;
786 while (!skb_queue_empty(&skbs)) {
787 skb = __skb_dequeue(&skbs);
788 hdr = (struct ieee80211_hdr *)skb->data;
789
790 if (!ieee80211_is_data_qos(hdr->frame_control))
791 priv->last_seq_ctl = tx_resp->seq_ctl;
792
793 info = IEEE80211_SKB_CB(skb);
794 ctx = info->driver_data[0];
795 kmem_cache_free(priv->tx_cmd_pool,
796 (info->driver_data[1]));
797
798 memset(&info->status, 0, sizeof(info->status));
799
800 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
801 iwl_is_associated_ctx(ctx) && ctx->vif &&
802 ctx->vif->type == NL80211_IFTYPE_STATION) {
803 ctx->last_tx_rejected = true;
804 iwl_trans_stop_queue(trans(priv), txq_id);
805
806 IWL_DEBUG_TX_REPLY(priv,
807 "TXQ %d status %s (0x%08x) "
808 "rate_n_flags 0x%x retries %d\n",
809 txq_id,
810 iwl_get_tx_fail_reason(status),
811 status,
812 le32_to_cpu(tx_resp->rate_n_flags),
813 tx_resp->failure_frame);
814
815 IWL_DEBUG_TX_REPLY(priv,
816 "FrameCnt = %d, idx=%d\n",
817 tx_resp->frame_count, cmd_index);
818 }
819
820 /* check if BAR is needed */
821 if (is_agg && !iwl_is_tx_success(status))
822 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
823 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
824 tx_resp, is_agg);
825 if (!is_agg)
826 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
827
828 ieee80211_tx_status_irqsafe(priv->hw, skb);
829
830 freed++;
831 }
832
833 WARN_ON(!is_agg && freed != 1);
834 }
835
836 iwl_check_abort_status(priv, tx_resp->frame_count, status);
837 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
838 return 0;
839 }
840
841 /**
842 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
843 *
844 * Handles block-acknowledge notification from device, which reports success
845 * of frames sent via aggregation.
846 */
847 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
848 struct iwl_rx_mem_buffer *rxb,
849 struct iwl_device_cmd *cmd)
850 {
851 struct iwl_rx_packet *pkt = rxb_addr(rxb);
852 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
853 struct iwl_ht_agg *agg;
854 struct sk_buff_head reclaimed_skbs;
855 struct ieee80211_tx_info *info;
856 struct ieee80211_hdr *hdr;
857 struct sk_buff *skb;
858 unsigned long flags;
859 int sta_id;
860 int tid;
861 int freed;
862
863 /* "flow" corresponds to Tx queue */
864 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
865
866 /* "ssn" is start of block-ack Tx window, corresponds to index
867 * (in Tx queue's circular buffer) of first TFD/frame in window */
868 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
869
870 if (scd_flow >= hw_params(priv).max_txq_num) {
871 IWL_ERR(priv,
872 "BUG_ON scd_flow is bigger than number of queues\n");
873 return 0;
874 }
875
876 sta_id = ba_resp->sta_id;
877 tid = ba_resp->tid;
878 agg = &priv->shrd->tid_data[sta_id][tid].agg;
879
880 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
881
882 if (unlikely(agg->txq_id != scd_flow)) {
883 /*
884 * FIXME: this is a uCode bug which need to be addressed,
885 * log the information and return for now!
886 * since it is possible happen very often and in order
887 * not to fill the syslog, don't enable the logging by default
888 */
889 IWL_DEBUG_TX_REPLY(priv,
890 "BA scd_flow %d does not match txq_id %d\n",
891 scd_flow, agg->txq_id);
892 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
893 return 0;
894 }
895
896 if (unlikely(!agg->wait_for_ba)) {
897 if (unlikely(ba_resp->bitmap))
898 IWL_ERR(priv, "Received BA when not expected\n");
899 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
900 return 0;
901 }
902
903 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
904 "sta_id = %d\n",
905 agg->wait_for_ba,
906 (u8 *) &ba_resp->sta_addr_lo32,
907 ba_resp->sta_id);
908 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
909 "scd_flow = %d, scd_ssn = %d\n",
910 ba_resp->tid,
911 ba_resp->seq_ctl,
912 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
913 ba_resp->scd_flow,
914 ba_resp->scd_ssn);
915
916 /* Mark that the expected block-ack response arrived */
917 agg->wait_for_ba = false;
918
919 /* Sanity check values reported by uCode */
920 if (ba_resp->txed_2_done > ba_resp->txed) {
921 IWL_DEBUG_TX_REPLY(priv,
922 "bogus sent(%d) and ack(%d) count\n",
923 ba_resp->txed, ba_resp->txed_2_done);
924 /*
925 * set txed_2_done = txed,
926 * so it won't impact rate scale
927 */
928 ba_resp->txed = ba_resp->txed_2_done;
929 }
930 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
931 ba_resp->txed, ba_resp->txed_2_done);
932
933 __skb_queue_head_init(&reclaimed_skbs);
934
935 /* Release all TFDs before the SSN, i.e. all TFDs in front of
936 * block-ack window (we assume that they've been successfully
937 * transmitted ... if not, it's too late anyway). */
938 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
939 0, &reclaimed_skbs);
940 freed = 0;
941 while (!skb_queue_empty(&reclaimed_skbs)) {
942
943 skb = __skb_dequeue(&reclaimed_skbs);
944 hdr = (struct ieee80211_hdr *)skb->data;
945
946 if (ieee80211_is_data_qos(hdr->frame_control))
947 freed++;
948 else
949 WARN_ON_ONCE(1);
950
951 info = IEEE80211_SKB_CB(skb);
952 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
953
954 if (freed == 1) {
955 /* this is the first skb we deliver in this batch */
956 /* put the rate scaling data there */
957 info = IEEE80211_SKB_CB(skb);
958 memset(&info->status, 0, sizeof(info->status));
959 info->flags |= IEEE80211_TX_STAT_ACK;
960 info->flags |= IEEE80211_TX_STAT_AMPDU;
961 info->status.ampdu_ack_len = ba_resp->txed_2_done;
962 info->status.ampdu_len = ba_resp->txed;
963 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
964 info);
965 }
966
967 ieee80211_tx_status_irqsafe(priv->hw, skb);
968 }
969
970 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
971 return 0;
972 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree