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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
blob35a6b71f358ce7a563f6507b58f0743eb6ded16a
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 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
95 }
96
97 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
98
99 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
100 if (ieee80211_is_mgmt(fc)) {
101 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
102 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
103 else
104 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
105 } else {
106 tx_cmd->timeout.pm_frame_timeout = 0;
107 }
108
109 tx_cmd->driver_txop = 0;
110 tx_cmd->tx_flags = tx_flags;
111 tx_cmd->next_frame_len = 0;
112 }
113
114 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
115 struct iwl_tx_cmd *tx_cmd,
116 struct ieee80211_tx_info *info,
117 __le16 fc)
118 {
119 u32 rate_flags;
120 int rate_idx;
121 u8 rts_retry_limit;
122 u8 data_retry_limit;
123 u8 rate_plcp;
124
125 if (priv->shrd->wowlan) {
126 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
127 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
128 } else {
129 /* Set retry limit on RTS packets */
130 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
131
132 /* Set retry limit on DATA packets and Probe Responses*/
133 if (ieee80211_is_probe_resp(fc)) {
134 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
135 rts_retry_limit =
136 min(data_retry_limit, rts_retry_limit);
137 } else if (ieee80211_is_back_req(fc))
138 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
139 else
140 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
141 }
142
143 tx_cmd->data_retry_limit = data_retry_limit;
144 tx_cmd->rts_retry_limit = rts_retry_limit;
145
146 /* DATA packets will use the uCode station table for rate/antenna
147 * selection */
148 if (ieee80211_is_data(fc)) {
149 tx_cmd->initial_rate_index = 0;
150 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
151 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
152 if (priv->tm_fixed_rate) {
153 /*
154 * rate overwrite by testmode
155 * we not only send lq command to change rate
156 * we also re-enforce per data pkt base.
157 */
158 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
159 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
160 sizeof(tx_cmd->rate_n_flags));
161 }
162 #endif
163 return;
164 }
165
166 /**
167 * If the current TX rate stored in mac80211 has the MCS bit set, it's
168 * not really a TX rate. Thus, we use the lowest supported rate for
169 * this band. Also use the lowest supported rate if the stored rate
170 * index is invalid.
171 */
172 rate_idx = info->control.rates[0].idx;
173 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
174 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
175 rate_idx = rate_lowest_index(&priv->bands[info->band],
176 info->control.sta);
177 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
178 if (info->band == IEEE80211_BAND_5GHZ)
179 rate_idx += IWL_FIRST_OFDM_RATE;
180 /* Get PLCP rate for tx_cmd->rate_n_flags */
181 rate_plcp = iwl_rates[rate_idx].plcp;
182 /* Zero out flags for this packet */
183 rate_flags = 0;
184
185 /* Set CCK flag as needed */
186 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
187 rate_flags |= RATE_MCS_CCK_MSK;
188
189 /* Set up antennas */
190 if (priv->cfg->bt_params &&
191 priv->cfg->bt_params->advanced_bt_coexist &&
192 priv->bt_full_concurrent) {
193 /* operated as 1x1 in full concurrency mode */
194 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
195 first_antenna(hw_params(priv).valid_tx_ant));
196 } else
197 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
198 hw_params(priv).valid_tx_ant);
199 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
200
201 /* Set the rate in the TX cmd */
202 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
203 }
204
205 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
206 struct ieee80211_tx_info *info,
207 struct iwl_tx_cmd *tx_cmd,
208 struct sk_buff *skb_frag,
209 int sta_id)
210 {
211 struct ieee80211_key_conf *keyconf = info->control.hw_key;
212
213 switch (keyconf->cipher) {
214 case WLAN_CIPHER_SUITE_CCMP:
215 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
216 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
217 if (info->flags & IEEE80211_TX_CTL_AMPDU)
218 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
219 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
220 break;
221
222 case WLAN_CIPHER_SUITE_TKIP:
223 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
224 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
225 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
226 break;
227
228 case WLAN_CIPHER_SUITE_WEP104:
229 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
230 /* fall through */
231 case WLAN_CIPHER_SUITE_WEP40:
232 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
233 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
234
235 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
236
237 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
238 "with key %d\n", keyconf->keyidx);
239 break;
240
241 default:
242 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
243 break;
244 }
245 }
246
247 /*
248 * start REPLY_TX command process
249 */
250 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
251 {
252 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
253 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
254 struct iwl_station_priv *sta_priv = NULL;
255 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
256 struct iwl_device_cmd *dev_cmd = NULL;
257 struct iwl_tx_cmd *tx_cmd;
258
259 __le16 fc;
260 u8 hdr_len;
261 u16 len;
262 u8 sta_id;
263 unsigned long flags;
264 bool is_agg = false;
265
266 if (info->control.vif)
267 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
268
269 spin_lock_irqsave(&priv->shrd->lock, flags);
270 if (iwl_is_rfkill(priv->shrd)) {
271 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
272 goto drop_unlock_priv;
273 }
274
275 fc = hdr->frame_control;
276
277 #ifdef CONFIG_IWLWIFI_DEBUG
278 if (ieee80211_is_auth(fc))
279 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
280 else if (ieee80211_is_assoc_req(fc))
281 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
282 else if (ieee80211_is_reassoc_req(fc))
283 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
284 #endif
285
286 hdr_len = ieee80211_hdrlen(fc);
287
288 /* For management frames use broadcast id to do not break aggregation */
289 if (!ieee80211_is_data(fc))
290 sta_id = ctx->bcast_sta_id;
291 else {
292 /* Find index into station table for destination station */
293 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
294 if (sta_id == IWL_INVALID_STATION) {
295 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
296 hdr->addr1);
297 goto drop_unlock_priv;
298 }
299 }
300
301 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
302
303 if (info->control.sta)
304 sta_priv = (void *)info->control.sta->drv_priv;
305
306 if (sta_priv && sta_priv->asleep &&
307 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
308 /*
309 * This sends an asynchronous command to the device,
310 * but we can rely on it being processed before the
311 * next frame is processed -- and the next frame to
312 * this station is the one that will consume this
313 * counter.
314 * For now set the counter to just 1 since we do not
315 * support uAPSD yet.
316 */
317 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
318 }
319
320 if (info->flags & IEEE80211_TX_CTL_AMPDU)
321 is_agg = true;
322
323 /* irqs already disabled/saved above when locking priv->shrd->lock */
324 spin_lock(&priv->shrd->sta_lock);
325
326 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
327
328 if (unlikely(!dev_cmd))
329 goto drop_unlock_sta;
330
331 memset(dev_cmd, 0, sizeof(*dev_cmd));
332 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
333
334 /* Total # bytes to be transmitted */
335 len = (u16)skb->len;
336 tx_cmd->len = cpu_to_le16(len);
337
338 if (info->control.hw_key)
339 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
340
341 /* TODO need this for burst mode later on */
342 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
343 iwl_dbg_log_tx_data_frame(priv, len, hdr);
344
345 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
346
347 iwl_update_stats(priv, true, fc, len);
348
349 memset(&info->status, 0, sizeof(info->status));
350
351 info->driver_data[0] = ctx;
352 info->driver_data[1] = dev_cmd;
353
354 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
355 goto drop_unlock_sta;
356
357 spin_unlock(&priv->shrd->sta_lock);
358 spin_unlock_irqrestore(&priv->shrd->lock, flags);
359
360 /*
361 * Avoid atomic ops if it isn't an associated client.
362 * Also, if this is a packet for aggregation, don't
363 * increase the counter because the ucode will stop
364 * aggregation queues when their respective station
365 * goes to sleep.
366 */
367 if (sta_priv && sta_priv->client && !is_agg)
368 atomic_inc(&sta_priv->pending_frames);
369
370 return 0;
371
372 drop_unlock_sta:
373 if (dev_cmd)
374 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
375 spin_unlock(&priv->shrd->sta_lock);
376 drop_unlock_priv:
377 spin_unlock_irqrestore(&priv->shrd->lock, flags);
378 return -1;
379 }
380
381 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
382 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
383 {
384 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
385 int sta_id;
386 int ret;
387
388 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
389 sta->addr, tid);
390
391 sta_id = iwl_sta_id(sta);
392 if (sta_id == IWL_INVALID_STATION) {
393 IWL_ERR(priv, "Start AGG on invalid station\n");
394 return -ENXIO;
395 }
396 if (unlikely(tid >= IWL_MAX_TID_COUNT))
397 return -EINVAL;
398
399 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
400 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
401 return -ENXIO;
402 }
403
404 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
405 if (ret)
406 return ret;
407
408 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
409 tid, ssn);
410
411 return ret;
412 }
413
414 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
415 struct ieee80211_sta *sta, u16 tid)
416 {
417 int sta_id;
418 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
419
420 sta_id = iwl_sta_id(sta);
421
422 if (sta_id == IWL_INVALID_STATION) {
423 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
424 return -ENXIO;
425 }
426
427 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
428 sta_id, tid);
429 }
430
431 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
432 struct iwl_rxon_context *ctx,
433 const u8 *addr1)
434 {
435 struct ieee80211_sta *sta;
436 struct iwl_station_priv *sta_priv;
437
438 rcu_read_lock();
439 sta = ieee80211_find_sta(ctx->vif, addr1);
440 if (sta) {
441 sta_priv = (void *)sta->drv_priv;
442 /* avoid atomic ops if this isn't a client */
443 if (sta_priv->client &&
444 atomic_dec_return(&sta_priv->pending_frames) == 0)
445 ieee80211_sta_block_awake(priv->hw, sta, false);
446 }
447 rcu_read_unlock();
448 }
449
450 /**
451 * translate ucode response to mac80211 tx status control values
452 */
453 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
454 struct ieee80211_tx_info *info)
455 {
456 struct ieee80211_tx_rate *r = &info->control.rates[0];
457
458 info->antenna_sel_tx =
459 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
460 if (rate_n_flags & RATE_MCS_HT_MSK)
461 r->flags |= IEEE80211_TX_RC_MCS;
462 if (rate_n_flags & RATE_MCS_GF_MSK)
463 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
464 if (rate_n_flags & RATE_MCS_HT40_MSK)
465 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
466 if (rate_n_flags & RATE_MCS_DUP_MSK)
467 r->flags |= IEEE80211_TX_RC_DUP_DATA;
468 if (rate_n_flags & RATE_MCS_SGI_MSK)
469 r->flags |= IEEE80211_TX_RC_SHORT_GI;
470 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
471 }
472
473 #ifdef CONFIG_IWLWIFI_DEBUG
474 const char *iwl_get_tx_fail_reason(u32 status)
475 {
476 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
477 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
478
479 switch (status & TX_STATUS_MSK) {
480 case TX_STATUS_SUCCESS:
481 return "SUCCESS";
482 TX_STATUS_POSTPONE(DELAY);
483 TX_STATUS_POSTPONE(FEW_BYTES);
484 TX_STATUS_POSTPONE(BT_PRIO);
485 TX_STATUS_POSTPONE(QUIET_PERIOD);
486 TX_STATUS_POSTPONE(CALC_TTAK);
487 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
488 TX_STATUS_FAIL(SHORT_LIMIT);
489 TX_STATUS_FAIL(LONG_LIMIT);
490 TX_STATUS_FAIL(FIFO_UNDERRUN);
491 TX_STATUS_FAIL(DRAIN_FLOW);
492 TX_STATUS_FAIL(RFKILL_FLUSH);
493 TX_STATUS_FAIL(LIFE_EXPIRE);
494 TX_STATUS_FAIL(DEST_PS);
495 TX_STATUS_FAIL(HOST_ABORTED);
496 TX_STATUS_FAIL(BT_RETRY);
497 TX_STATUS_FAIL(STA_INVALID);
498 TX_STATUS_FAIL(FRAG_DROPPED);
499 TX_STATUS_FAIL(TID_DISABLE);
500 TX_STATUS_FAIL(FIFO_FLUSHED);
501 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
502 TX_STATUS_FAIL(PASSIVE_NO_RX);
503 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
504 }
505
506 return "UNKNOWN";
507
508 #undef TX_STATUS_FAIL
509 #undef TX_STATUS_POSTPONE
510 }
511 #endif /* CONFIG_IWLWIFI_DEBUG */
512
513 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
514 {
515 status &= AGG_TX_STATUS_MSK;
516
517 switch (status) {
518 case AGG_TX_STATE_UNDERRUN_MSK:
519 priv->reply_agg_tx_stats.underrun++;
520 break;
521 case AGG_TX_STATE_BT_PRIO_MSK:
522 priv->reply_agg_tx_stats.bt_prio++;
523 break;
524 case AGG_TX_STATE_FEW_BYTES_MSK:
525 priv->reply_agg_tx_stats.few_bytes++;
526 break;
527 case AGG_TX_STATE_ABORT_MSK:
528 priv->reply_agg_tx_stats.abort++;
529 break;
530 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
531 priv->reply_agg_tx_stats.last_sent_ttl++;
532 break;
533 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
534 priv->reply_agg_tx_stats.last_sent_try++;
535 break;
536 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
537 priv->reply_agg_tx_stats.last_sent_bt_kill++;
538 break;
539 case AGG_TX_STATE_SCD_QUERY_MSK:
540 priv->reply_agg_tx_stats.scd_query++;
541 break;
542 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
543 priv->reply_agg_tx_stats.bad_crc32++;
544 break;
545 case AGG_TX_STATE_RESPONSE_MSK:
546 priv->reply_agg_tx_stats.response++;
547 break;
548 case AGG_TX_STATE_DUMP_TX_MSK:
549 priv->reply_agg_tx_stats.dump_tx++;
550 break;
551 case AGG_TX_STATE_DELAY_TX_MSK:
552 priv->reply_agg_tx_stats.delay_tx++;
553 break;
554 default:
555 priv->reply_agg_tx_stats.unknown++;
556 break;
557 }
558 }
559
560 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
561 struct iwlagn_tx_resp *tx_resp)
562 {
563 struct agg_tx_status *frame_status = &tx_resp->status;
564 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
565 IWLAGN_TX_RES_TID_POS;
566 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
567 IWLAGN_TX_RES_RA_POS;
568 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
569 u32 status = le16_to_cpu(tx_resp->status.status);
570 int i;
571
572 if (agg->wait_for_ba)
573 IWL_DEBUG_TX_REPLY(priv,
574 "got tx response w/o block-ack\n");
575
576 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
577 agg->wait_for_ba = (tx_resp->frame_count > 1);
578
579 /*
580 * If the BT kill count is non-zero, we'll get this
581 * notification again.
582 */
583 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
584 priv->cfg->bt_params &&
585 priv->cfg->bt_params->advanced_bt_coexist) {
586 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
587 }
588
589 if (tx_resp->frame_count == 1)
590 return;
591
592 /* Construct bit-map of pending frames within Tx window */
593 for (i = 0; i < tx_resp->frame_count; i++) {
594 u16 fstatus = le16_to_cpu(frame_status[i].status);
595
596 if (status & AGG_TX_STATUS_MSK)
597 iwlagn_count_agg_tx_err_status(priv, fstatus);
598
599 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
600 AGG_TX_STATE_ABORT_MSK))
601 continue;
602
603 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
604 "try-count (0x%08x)\n",
605 iwl_get_agg_tx_fail_reason(fstatus),
606 fstatus & AGG_TX_STATUS_MSK,
607 fstatus & AGG_TX_TRY_MSK);
608 }
609 }
610
611 #ifdef CONFIG_IWLWIFI_DEBUG
612 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
613
614 const char *iwl_get_agg_tx_fail_reason(u16 status)
615 {
616 status &= AGG_TX_STATUS_MSK;
617 switch (status) {
618 case AGG_TX_STATE_TRANSMITTED:
619 return "SUCCESS";
620 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
621 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
622 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
623 AGG_TX_STATE_FAIL(ABORT_MSK);
624 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
625 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
626 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
627 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
628 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
629 AGG_TX_STATE_FAIL(RESPONSE_MSK);
630 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
631 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
632 }
633
634 return "UNKNOWN";
635 }
636 #endif /* CONFIG_IWLWIFI_DEBUG */
637
638 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
639 {
640 return le32_to_cpup((__le32 *)&tx_resp->status +
641 tx_resp->frame_count) & MAX_SN;
642 }
643
644 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
645 {
646 status &= TX_STATUS_MSK;
647
648 switch (status) {
649 case TX_STATUS_POSTPONE_DELAY:
650 priv->reply_tx_stats.pp_delay++;
651 break;
652 case TX_STATUS_POSTPONE_FEW_BYTES:
653 priv->reply_tx_stats.pp_few_bytes++;
654 break;
655 case TX_STATUS_POSTPONE_BT_PRIO:
656 priv->reply_tx_stats.pp_bt_prio++;
657 break;
658 case TX_STATUS_POSTPONE_QUIET_PERIOD:
659 priv->reply_tx_stats.pp_quiet_period++;
660 break;
661 case TX_STATUS_POSTPONE_CALC_TTAK:
662 priv->reply_tx_stats.pp_calc_ttak++;
663 break;
664 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
665 priv->reply_tx_stats.int_crossed_retry++;
666 break;
667 case TX_STATUS_FAIL_SHORT_LIMIT:
668 priv->reply_tx_stats.short_limit++;
669 break;
670 case TX_STATUS_FAIL_LONG_LIMIT:
671 priv->reply_tx_stats.long_limit++;
672 break;
673 case TX_STATUS_FAIL_FIFO_UNDERRUN:
674 priv->reply_tx_stats.fifo_underrun++;
675 break;
676 case TX_STATUS_FAIL_DRAIN_FLOW:
677 priv->reply_tx_stats.drain_flow++;
678 break;
679 case TX_STATUS_FAIL_RFKILL_FLUSH:
680 priv->reply_tx_stats.rfkill_flush++;
681 break;
682 case TX_STATUS_FAIL_LIFE_EXPIRE:
683 priv->reply_tx_stats.life_expire++;
684 break;
685 case TX_STATUS_FAIL_DEST_PS:
686 priv->reply_tx_stats.dest_ps++;
687 break;
688 case TX_STATUS_FAIL_HOST_ABORTED:
689 priv->reply_tx_stats.host_abort++;
690 break;
691 case TX_STATUS_FAIL_BT_RETRY:
692 priv->reply_tx_stats.bt_retry++;
693 break;
694 case TX_STATUS_FAIL_STA_INVALID:
695 priv->reply_tx_stats.sta_invalid++;
696 break;
697 case TX_STATUS_FAIL_FRAG_DROPPED:
698 priv->reply_tx_stats.frag_drop++;
699 break;
700 case TX_STATUS_FAIL_TID_DISABLE:
701 priv->reply_tx_stats.tid_disable++;
702 break;
703 case TX_STATUS_FAIL_FIFO_FLUSHED:
704 priv->reply_tx_stats.fifo_flush++;
705 break;
706 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
707 priv->reply_tx_stats.insuff_cf_poll++;
708 break;
709 case TX_STATUS_FAIL_PASSIVE_NO_RX:
710 priv->reply_tx_stats.fail_hw_drop++;
711 break;
712 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
713 priv->reply_tx_stats.sta_color_mismatch++;
714 break;
715 default:
716 priv->reply_tx_stats.unknown++;
717 break;
718 }
719 }
720
721 static void iwlagn_set_tx_status(struct iwl_priv *priv,
722 struct ieee80211_tx_info *info,
723 struct iwlagn_tx_resp *tx_resp,
724 bool is_agg)
725 {
726 u16 status = le16_to_cpu(tx_resp->status.status);
727
728 info->status.rates[0].count = tx_resp->failure_frame + 1;
729 if (is_agg)
730 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
731 info->flags |= iwl_tx_status_to_mac80211(status);
732 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
733 info);
734 if (!iwl_is_tx_success(status))
735 iwlagn_count_tx_err_status(priv, status);
736 }
737
738 static void iwl_check_abort_status(struct iwl_priv *priv,
739 u8 frame_count, u32 status)
740 {
741 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
742 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
743 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
744 queue_work(priv->shrd->workqueue, &priv->tx_flush);
745 }
746 }
747
748 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
749 struct iwl_device_cmd *cmd)
750 {
751 struct iwl_rx_packet *pkt = rxb_addr(rxb);
752 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
753 int txq_id = SEQ_TO_QUEUE(sequence);
754 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
755 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
756 struct ieee80211_hdr *hdr;
757 u32 status = le16_to_cpu(tx_resp->status.status);
758 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
759 int tid;
760 int sta_id;
761 int freed;
762 struct ieee80211_tx_info *info;
763 unsigned long flags;
764 struct sk_buff_head skbs;
765 struct sk_buff *skb;
766 struct iwl_rxon_context *ctx;
767 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
768
769 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
770 IWLAGN_TX_RES_TID_POS;
771 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
772 IWLAGN_TX_RES_RA_POS;
773
774 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
775
776 if (is_agg)
777 iwl_rx_reply_tx_agg(priv, tx_resp);
778
779 if (tx_resp->frame_count == 1) {
780 __skb_queue_head_init(&skbs);
781 /*we can free until ssn % q.n_bd not inclusive */
782 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
783 ssn, status, &skbs);
784 freed = 0;
785 while (!skb_queue_empty(&skbs)) {
786 skb = __skb_dequeue(&skbs);
787 hdr = (struct ieee80211_hdr *)skb->data;
788
789 if (!ieee80211_is_data_qos(hdr->frame_control))
790 priv->last_seq_ctl = tx_resp->seq_ctl;
791
792 info = IEEE80211_SKB_CB(skb);
793 ctx = info->driver_data[0];
794 kmem_cache_free(priv->tx_cmd_pool,
795 (info->driver_data[1]));
796
797 memset(&info->status, 0, sizeof(info->status));
798
799 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
800 iwl_is_associated_ctx(ctx) && ctx->vif &&
801 ctx->vif->type == NL80211_IFTYPE_STATION) {
802 ctx->last_tx_rejected = true;
803 iwl_trans_stop_queue(trans(priv), txq_id);
804
805 IWL_DEBUG_TX_REPLY(priv,
806 "TXQ %d status %s (0x%08x) "
807 "rate_n_flags 0x%x retries %d\n",
808 txq_id,
809 iwl_get_tx_fail_reason(status),
810 status,
811 le32_to_cpu(tx_resp->rate_n_flags),
812 tx_resp->failure_frame);
813
814 IWL_DEBUG_TX_REPLY(priv,
815 "FrameCnt = %d, idx=%d\n",
816 tx_resp->frame_count, cmd_index);
817 }
818
819 /* check if BAR is needed */
820 if (is_agg && !iwl_is_tx_success(status))
821 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
822 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
823 tx_resp, is_agg);
824 if (!is_agg)
825 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
826
827 ieee80211_tx_status_irqsafe(priv->hw, skb);
828
829 freed++;
830 }
831
832 WARN_ON(!is_agg && freed != 1);
833 }
834
835 iwl_check_abort_status(priv, tx_resp->frame_count, status);
836 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
837 return 0;
838 }
839
840 /**
841 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
842 *
843 * Handles block-acknowledge notification from device, which reports success
844 * of frames sent via aggregation.
845 */
846 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
847 struct iwl_rx_mem_buffer *rxb,
848 struct iwl_device_cmd *cmd)
849 {
850 struct iwl_rx_packet *pkt = rxb_addr(rxb);
851 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
852 struct iwl_ht_agg *agg;
853 struct sk_buff_head reclaimed_skbs;
854 struct ieee80211_tx_info *info;
855 struct ieee80211_hdr *hdr;
856 struct sk_buff *skb;
857 unsigned long flags;
858 int sta_id;
859 int tid;
860 int freed;
861
862 /* "flow" corresponds to Tx queue */
863 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
864
865 /* "ssn" is start of block-ack Tx window, corresponds to index
866 * (in Tx queue's circular buffer) of first TFD/frame in window */
867 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
868
869 if (scd_flow >= hw_params(priv).max_txq_num) {
870 IWL_ERR(priv,
871 "BUG_ON scd_flow is bigger than number of queues\n");
872 return 0;
873 }
874
875 sta_id = ba_resp->sta_id;
876 tid = ba_resp->tid;
877 agg = &priv->shrd->tid_data[sta_id][tid].agg;
878
879 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
880
881 if (unlikely(agg->txq_id != scd_flow)) {
882 /*
883 * FIXME: this is a uCode bug which need to be addressed,
884 * log the information and return for now!
885 * since it is possible happen very often and in order
886 * not to fill the syslog, don't enable the logging by default
887 */
888 IWL_DEBUG_TX_REPLY(priv,
889 "BA scd_flow %d does not match txq_id %d\n",
890 scd_flow, agg->txq_id);
891 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
892 return 0;
893 }
894
895 if (unlikely(!agg->wait_for_ba)) {
896 if (unlikely(ba_resp->bitmap))
897 IWL_ERR(priv, "Received BA when not expected\n");
898 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
899 return 0;
900 }
901
902 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
903 "sta_id = %d\n",
904 agg->wait_for_ba,
905 (u8 *) &ba_resp->sta_addr_lo32,
906 ba_resp->sta_id);
907 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
908 "scd_flow = %d, scd_ssn = %d\n",
909 ba_resp->tid,
910 ba_resp->seq_ctl,
911 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
912 ba_resp->scd_flow,
913 ba_resp->scd_ssn);
914
915 /* Mark that the expected block-ack response arrived */
916 agg->wait_for_ba = false;
917
918 /* Sanity check values reported by uCode */
919 if (ba_resp->txed_2_done > ba_resp->txed) {
920 IWL_DEBUG_TX_REPLY(priv,
921 "bogus sent(%d) and ack(%d) count\n",
922 ba_resp->txed, ba_resp->txed_2_done);
923 /*
924 * set txed_2_done = txed,
925 * so it won't impact rate scale
926 */
927 ba_resp->txed = ba_resp->txed_2_done;
928 }
929 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
930 ba_resp->txed, ba_resp->txed_2_done);
931
932 __skb_queue_head_init(&reclaimed_skbs);
933
934 /* Release all TFDs before the SSN, i.e. all TFDs in front of
935 * block-ack window (we assume that they've been successfully
936 * transmitted ... if not, it's too late anyway). */
937 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
938 0, &reclaimed_skbs);
939 freed = 0;
940 while (!skb_queue_empty(&reclaimed_skbs)) {
941
942 skb = __skb_dequeue(&reclaimed_skbs);
943 hdr = (struct ieee80211_hdr *)skb->data;
944
945 if (ieee80211_is_data_qos(hdr->frame_control))
946 freed++;
947 else
948 WARN_ON_ONCE(1);
949
950 info = IEEE80211_SKB_CB(skb);
951 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
952
953 if (freed == 1) {
954 /* this is the first skb we deliver in this batch */
955 /* put the rate scaling data there */
956 info = IEEE80211_SKB_CB(skb);
957 memset(&info->status, 0, sizeof(info->status));
958 info->flags |= IEEE80211_TX_STAT_ACK;
959 info->flags |= IEEE80211_TX_STAT_AMPDU;
960 info->status.ampdu_ack_len = ba_resp->txed_2_done;
961 info->status.ampdu_len = ba_resp->txed;
962 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
963 info);
964 }
965
966 ieee80211_tx_status_irqsafe(priv->hw, skb);
967 }
968
969 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
970 return 0;
971 }
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