1 /******************************************************************************
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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.
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.
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,
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
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>
39 #include "iwl-agn-hw.h"
41 #include "iwl-trans.h"
43 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
44 struct ieee80211_tx_info *info,
45 __le16 fc, __le32 *tx_flags)
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;
54 * handle build REPLY_TX command notification.
56 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
58 struct iwl_tx_cmd *tx_cmd,
59 struct ieee80211_tx_info *info,
60 struct ieee80211_hdr *hdr, u8 sta_id)
62 __le16 fc = hdr->frame_control;
63 __le32 tx_flags = tx_cmd->tx_flags;
65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
67 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
68 tx_flags |= TX_CMD_FLG_ACK_MSK;
70 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
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;
85 tx_cmd->sta_id = sta_id;
86 if (ieee80211_has_morefrags(fc))
87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
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;
94 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
97 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
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);
104 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
106 tx_cmd->timeout.pm_frame_timeout = 0;
109 tx_cmd->driver_txop = 0;
110 tx_cmd->tx_flags = tx_flags;
111 tx_cmd->next_frame_len = 0;
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,
125 if (priv->shrd->wowlan) {
126 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
127 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
129 /* Set retry limit on RTS packets */
130 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
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;
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;
140 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
143 tx_cmd->data_retry_limit = data_retry_limit;
144 tx_cmd->rts_retry_limit = rts_retry_limit;
146 /* DATA packets will use the uCode station table for rate/antenna
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_TESTMODE
152 if (priv->tm_fixed_rate) {
154 * rate overwrite by testmode
155 * we not only send lq command to change rate
156 * we also re-enforce per data pkt base.
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));
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
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],
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 */
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;
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));
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);
201 /* Set the rate in the TX cmd */
202 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
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,
211 struct ieee80211_key_conf *keyconf = info->control.hw_key;
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");
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");
228 case WLAN_CIPHER_SUITE_WEP104:
229 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
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);
235 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
237 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
238 "with key %d\n", keyconf->keyidx);
242 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
248 * start REPLY_TX command process
250 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
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;
266 if (info->control.vif)
267 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
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;
275 fc = hdr->frame_control;
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");
286 if (unlikely(ieee80211_is_probe_resp(fc))) {
287 struct iwl_wipan_noa_data *noa_data =
288 rcu_dereference(priv->noa_data);
291 pskb_expand_head(skb, 0, noa_data->length,
293 memcpy(skb_put(skb, noa_data->length),
294 noa_data->data, noa_data->length);
295 hdr = (struct ieee80211_hdr *)skb->data;
299 hdr_len = ieee80211_hdrlen(fc);
301 /* For management frames use broadcast id to do not break aggregation */
302 if (!ieee80211_is_data(fc))
303 sta_id = ctx->bcast_sta_id;
305 /* Find index into station table for destination station */
306 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
307 if (sta_id == IWL_INVALID_STATION) {
308 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
310 goto drop_unlock_priv;
314 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
316 if (info->control.sta)
317 sta_priv = (void *)info->control.sta->drv_priv;
319 if (sta_priv && sta_priv->asleep &&
320 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
322 * This sends an asynchronous command to the device,
323 * but we can rely on it being processed before the
324 * next frame is processed -- and the next frame to
325 * this station is the one that will consume this
327 * For now set the counter to just 1 since we do not
330 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
333 if (info->flags & IEEE80211_TX_CTL_AMPDU)
336 /* irqs already disabled/saved above when locking priv->shrd->lock */
337 spin_lock(&priv->shrd->sta_lock);
339 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
341 if (unlikely(!dev_cmd))
342 goto drop_unlock_sta;
344 memset(dev_cmd, 0, sizeof(*dev_cmd));
345 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
347 /* Total # bytes to be transmitted */
349 tx_cmd->len = cpu_to_le16(len);
351 if (info->control.hw_key)
352 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
354 /* TODO need this for burst mode later on */
355 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
356 iwl_dbg_log_tx_data_frame(priv, len, hdr);
358 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
360 iwl_update_stats(priv, true, fc, len);
362 memset(&info->status, 0, sizeof(info->status));
364 info->driver_data[0] = ctx;
365 info->driver_data[1] = dev_cmd;
367 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
368 goto drop_unlock_sta;
370 spin_unlock(&priv->shrd->sta_lock);
371 spin_unlock_irqrestore(&priv->shrd->lock, flags);
374 * Avoid atomic ops if it isn't an associated client.
375 * Also, if this is a packet for aggregation, don't
376 * increase the counter because the ucode will stop
377 * aggregation queues when their respective station
380 if (sta_priv && sta_priv->client && !is_agg)
381 atomic_inc(&sta_priv->pending_frames);
387 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
388 spin_unlock(&priv->shrd->sta_lock);
390 spin_unlock_irqrestore(&priv->shrd->lock, flags);
394 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
395 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
397 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
401 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
404 sta_id = iwl_sta_id(sta);
405 if (sta_id == IWL_INVALID_STATION) {
406 IWL_ERR(priv, "Start AGG on invalid station\n");
409 if (unlikely(tid >= IWL_MAX_TID_COUNT))
412 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
413 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
417 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
421 ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
427 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
428 struct ieee80211_sta *sta, u16 tid)
431 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
433 sta_id = iwl_sta_id(sta);
435 if (sta_id == IWL_INVALID_STATION) {
436 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
440 return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
444 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
445 struct iwl_rxon_context *ctx,
448 struct ieee80211_sta *sta;
449 struct iwl_station_priv *sta_priv;
452 sta = ieee80211_find_sta(ctx->vif, addr1);
454 sta_priv = (void *)sta->drv_priv;
455 /* avoid atomic ops if this isn't a client */
456 if (sta_priv->client &&
457 atomic_dec_return(&sta_priv->pending_frames) == 0)
458 ieee80211_sta_block_awake(priv->hw, sta, false);
464 * translate ucode response to mac80211 tx status control values
466 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
467 struct ieee80211_tx_info *info)
469 struct ieee80211_tx_rate *r = &info->control.rates[0];
471 info->antenna_sel_tx =
472 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
473 if (rate_n_flags & RATE_MCS_HT_MSK)
474 r->flags |= IEEE80211_TX_RC_MCS;
475 if (rate_n_flags & RATE_MCS_GF_MSK)
476 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
477 if (rate_n_flags & RATE_MCS_HT40_MSK)
478 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
479 if (rate_n_flags & RATE_MCS_DUP_MSK)
480 r->flags |= IEEE80211_TX_RC_DUP_DATA;
481 if (rate_n_flags & RATE_MCS_SGI_MSK)
482 r->flags |= IEEE80211_TX_RC_SHORT_GI;
483 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
486 #ifdef CONFIG_IWLWIFI_DEBUG
487 const char *iwl_get_tx_fail_reason(u32 status)
489 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
490 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
492 switch (status & TX_STATUS_MSK) {
493 case TX_STATUS_SUCCESS:
495 TX_STATUS_POSTPONE(DELAY);
496 TX_STATUS_POSTPONE(FEW_BYTES);
497 TX_STATUS_POSTPONE(BT_PRIO);
498 TX_STATUS_POSTPONE(QUIET_PERIOD);
499 TX_STATUS_POSTPONE(CALC_TTAK);
500 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
501 TX_STATUS_FAIL(SHORT_LIMIT);
502 TX_STATUS_FAIL(LONG_LIMIT);
503 TX_STATUS_FAIL(FIFO_UNDERRUN);
504 TX_STATUS_FAIL(DRAIN_FLOW);
505 TX_STATUS_FAIL(RFKILL_FLUSH);
506 TX_STATUS_FAIL(LIFE_EXPIRE);
507 TX_STATUS_FAIL(DEST_PS);
508 TX_STATUS_FAIL(HOST_ABORTED);
509 TX_STATUS_FAIL(BT_RETRY);
510 TX_STATUS_FAIL(STA_INVALID);
511 TX_STATUS_FAIL(FRAG_DROPPED);
512 TX_STATUS_FAIL(TID_DISABLE);
513 TX_STATUS_FAIL(FIFO_FLUSHED);
514 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
515 TX_STATUS_FAIL(PASSIVE_NO_RX);
516 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
521 #undef TX_STATUS_FAIL
522 #undef TX_STATUS_POSTPONE
524 #endif /* CONFIG_IWLWIFI_DEBUG */
526 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
528 status &= AGG_TX_STATUS_MSK;
531 case AGG_TX_STATE_UNDERRUN_MSK:
532 priv->reply_agg_tx_stats.underrun++;
534 case AGG_TX_STATE_BT_PRIO_MSK:
535 priv->reply_agg_tx_stats.bt_prio++;
537 case AGG_TX_STATE_FEW_BYTES_MSK:
538 priv->reply_agg_tx_stats.few_bytes++;
540 case AGG_TX_STATE_ABORT_MSK:
541 priv->reply_agg_tx_stats.abort++;
543 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
544 priv->reply_agg_tx_stats.last_sent_ttl++;
546 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
547 priv->reply_agg_tx_stats.last_sent_try++;
549 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
550 priv->reply_agg_tx_stats.last_sent_bt_kill++;
552 case AGG_TX_STATE_SCD_QUERY_MSK:
553 priv->reply_agg_tx_stats.scd_query++;
555 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
556 priv->reply_agg_tx_stats.bad_crc32++;
558 case AGG_TX_STATE_RESPONSE_MSK:
559 priv->reply_agg_tx_stats.response++;
561 case AGG_TX_STATE_DUMP_TX_MSK:
562 priv->reply_agg_tx_stats.dump_tx++;
564 case AGG_TX_STATE_DELAY_TX_MSK:
565 priv->reply_agg_tx_stats.delay_tx++;
568 priv->reply_agg_tx_stats.unknown++;
573 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
574 struct iwlagn_tx_resp *tx_resp)
576 struct agg_tx_status *frame_status = &tx_resp->status;
577 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
578 IWLAGN_TX_RES_TID_POS;
579 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
580 IWLAGN_TX_RES_RA_POS;
581 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
582 u32 status = le16_to_cpu(tx_resp->status.status);
585 if (agg->wait_for_ba)
586 IWL_DEBUG_TX_REPLY(priv,
587 "got tx response w/o block-ack\n");
589 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
590 agg->wait_for_ba = (tx_resp->frame_count > 1);
593 * If the BT kill count is non-zero, we'll get this
594 * notification again.
596 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
597 priv->cfg->bt_params &&
598 priv->cfg->bt_params->advanced_bt_coexist) {
599 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
602 if (tx_resp->frame_count == 1)
605 /* Construct bit-map of pending frames within Tx window */
606 for (i = 0; i < tx_resp->frame_count; i++) {
607 u16 fstatus = le16_to_cpu(frame_status[i].status);
609 if (status & AGG_TX_STATUS_MSK)
610 iwlagn_count_agg_tx_err_status(priv, fstatus);
612 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
613 AGG_TX_STATE_ABORT_MSK))
616 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
617 "try-count (0x%08x)\n",
618 iwl_get_agg_tx_fail_reason(fstatus),
619 fstatus & AGG_TX_STATUS_MSK,
620 fstatus & AGG_TX_TRY_MSK);
624 #ifdef CONFIG_IWLWIFI_DEBUG
625 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
627 const char *iwl_get_agg_tx_fail_reason(u16 status)
629 status &= AGG_TX_STATUS_MSK;
631 case AGG_TX_STATE_TRANSMITTED:
633 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
634 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
635 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
636 AGG_TX_STATE_FAIL(ABORT_MSK);
637 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
638 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
639 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
640 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
641 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
642 AGG_TX_STATE_FAIL(RESPONSE_MSK);
643 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
644 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
649 #endif /* CONFIG_IWLWIFI_DEBUG */
651 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
653 return le32_to_cpup((__le32 *)&tx_resp->status +
654 tx_resp->frame_count) & MAX_SN;
657 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
659 status &= TX_STATUS_MSK;
662 case TX_STATUS_POSTPONE_DELAY:
663 priv->reply_tx_stats.pp_delay++;
665 case TX_STATUS_POSTPONE_FEW_BYTES:
666 priv->reply_tx_stats.pp_few_bytes++;
668 case TX_STATUS_POSTPONE_BT_PRIO:
669 priv->reply_tx_stats.pp_bt_prio++;
671 case TX_STATUS_POSTPONE_QUIET_PERIOD:
672 priv->reply_tx_stats.pp_quiet_period++;
674 case TX_STATUS_POSTPONE_CALC_TTAK:
675 priv->reply_tx_stats.pp_calc_ttak++;
677 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
678 priv->reply_tx_stats.int_crossed_retry++;
680 case TX_STATUS_FAIL_SHORT_LIMIT:
681 priv->reply_tx_stats.short_limit++;
683 case TX_STATUS_FAIL_LONG_LIMIT:
684 priv->reply_tx_stats.long_limit++;
686 case TX_STATUS_FAIL_FIFO_UNDERRUN:
687 priv->reply_tx_stats.fifo_underrun++;
689 case TX_STATUS_FAIL_DRAIN_FLOW:
690 priv->reply_tx_stats.drain_flow++;
692 case TX_STATUS_FAIL_RFKILL_FLUSH:
693 priv->reply_tx_stats.rfkill_flush++;
695 case TX_STATUS_FAIL_LIFE_EXPIRE:
696 priv->reply_tx_stats.life_expire++;
698 case TX_STATUS_FAIL_DEST_PS:
699 priv->reply_tx_stats.dest_ps++;
701 case TX_STATUS_FAIL_HOST_ABORTED:
702 priv->reply_tx_stats.host_abort++;
704 case TX_STATUS_FAIL_BT_RETRY:
705 priv->reply_tx_stats.bt_retry++;
707 case TX_STATUS_FAIL_STA_INVALID:
708 priv->reply_tx_stats.sta_invalid++;
710 case TX_STATUS_FAIL_FRAG_DROPPED:
711 priv->reply_tx_stats.frag_drop++;
713 case TX_STATUS_FAIL_TID_DISABLE:
714 priv->reply_tx_stats.tid_disable++;
716 case TX_STATUS_FAIL_FIFO_FLUSHED:
717 priv->reply_tx_stats.fifo_flush++;
719 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
720 priv->reply_tx_stats.insuff_cf_poll++;
722 case TX_STATUS_FAIL_PASSIVE_NO_RX:
723 priv->reply_tx_stats.fail_hw_drop++;
725 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
726 priv->reply_tx_stats.sta_color_mismatch++;
729 priv->reply_tx_stats.unknown++;
734 static void iwlagn_set_tx_status(struct iwl_priv *priv,
735 struct ieee80211_tx_info *info,
736 struct iwlagn_tx_resp *tx_resp,
739 u16 status = le16_to_cpu(tx_resp->status.status);
741 info->status.rates[0].count = tx_resp->failure_frame + 1;
743 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
744 info->flags |= iwl_tx_status_to_mac80211(status);
745 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
747 if (!iwl_is_tx_success(status))
748 iwlagn_count_tx_err_status(priv, status);
751 static void iwl_check_abort_status(struct iwl_priv *priv,
752 u8 frame_count, u32 status)
754 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
755 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
756 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
757 queue_work(priv->shrd->workqueue, &priv->tx_flush);
761 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
762 struct iwl_device_cmd *cmd)
764 struct iwl_rx_packet *pkt = rxb_addr(rxb);
765 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
766 int txq_id = SEQ_TO_QUEUE(sequence);
767 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
768 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
769 struct ieee80211_hdr *hdr;
770 u32 status = le16_to_cpu(tx_resp->status.status);
771 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
775 struct ieee80211_tx_info *info;
777 struct sk_buff_head skbs;
779 struct iwl_rxon_context *ctx;
780 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
782 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
783 IWLAGN_TX_RES_TID_POS;
784 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
785 IWLAGN_TX_RES_RA_POS;
787 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
790 iwl_rx_reply_tx_agg(priv, tx_resp);
792 if (tx_resp->frame_count == 1) {
793 IWL_DEBUG_TX_REPLY(priv, "Q %d, ssn %d", txq_id, ssn);
794 __skb_queue_head_init(&skbs);
795 /*we can free until ssn % q.n_bd not inclusive */
796 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
799 while (!skb_queue_empty(&skbs)) {
800 skb = __skb_dequeue(&skbs);
801 hdr = (struct ieee80211_hdr *)skb->data;
803 if (!ieee80211_is_data_qos(hdr->frame_control))
804 priv->last_seq_ctl = tx_resp->seq_ctl;
806 info = IEEE80211_SKB_CB(skb);
807 ctx = info->driver_data[0];
808 kmem_cache_free(priv->tx_cmd_pool,
809 (info->driver_data[1]));
811 memset(&info->status, 0, sizeof(info->status));
813 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
814 iwl_is_associated_ctx(ctx) && ctx->vif &&
815 ctx->vif->type == NL80211_IFTYPE_STATION) {
816 ctx->last_tx_rejected = true;
817 iwl_trans_stop_queue(trans(priv), txq_id,
818 "Tx on passive channel");
820 IWL_DEBUG_TX_REPLY(priv,
821 "TXQ %d status %s (0x%08x) "
822 "rate_n_flags 0x%x retries %d\n",
824 iwl_get_tx_fail_reason(status),
826 le32_to_cpu(tx_resp->rate_n_flags),
827 tx_resp->failure_frame);
829 IWL_DEBUG_TX_REPLY(priv,
830 "FrameCnt = %d, idx=%d\n",
831 tx_resp->frame_count, cmd_index);
834 /* check if BAR is needed */
835 if (is_agg && !iwl_is_tx_success(status))
836 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
837 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
840 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
842 ieee80211_tx_status_irqsafe(priv->hw, skb);
847 WARN_ON(!is_agg && freed != 1);
850 iwl_check_abort_status(priv, tx_resp->frame_count, status);
851 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
856 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
858 * Handles block-acknowledge notification from device, which reports success
859 * of frames sent via aggregation.
861 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
862 struct iwl_rx_mem_buffer *rxb,
863 struct iwl_device_cmd *cmd)
865 struct iwl_rx_packet *pkt = rxb_addr(rxb);
866 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
867 struct iwl_ht_agg *agg;
868 struct sk_buff_head reclaimed_skbs;
869 struct ieee80211_tx_info *info;
870 struct ieee80211_hdr *hdr;
877 /* "flow" corresponds to Tx queue */
878 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
880 /* "ssn" is start of block-ack Tx window, corresponds to index
881 * (in Tx queue's circular buffer) of first TFD/frame in window */
882 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
884 if (scd_flow >= hw_params(priv).max_txq_num) {
886 "BUG_ON scd_flow is bigger than number of queues\n");
890 sta_id = ba_resp->sta_id;
892 agg = &priv->shrd->tid_data[sta_id][tid].agg;
894 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
896 if (unlikely(agg->txq_id != scd_flow)) {
898 * FIXME: this is a uCode bug which need to be addressed,
899 * log the information and return for now!
900 * since it is possible happen very often and in order
901 * not to fill the syslog, don't enable the logging by default
903 IWL_DEBUG_TX_REPLY(priv,
904 "BA scd_flow %d does not match txq_id %d\n",
905 scd_flow, agg->txq_id);
906 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
910 if (unlikely(!agg->wait_for_ba)) {
911 if (unlikely(ba_resp->bitmap))
912 IWL_ERR(priv, "Received BA when not expected\n");
913 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
917 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
920 (u8 *) &ba_resp->sta_addr_lo32,
922 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
923 "scd_flow = %d, scd_ssn = %d\n",
924 ba_resp->tid, ba_resp->seq_ctl,
925 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
926 scd_flow, ba_resp_scd_ssn);
928 /* Mark that the expected block-ack response arrived */
929 agg->wait_for_ba = false;
931 /* Sanity check values reported by uCode */
932 if (ba_resp->txed_2_done > ba_resp->txed) {
933 IWL_DEBUG_TX_REPLY(priv,
934 "bogus sent(%d) and ack(%d) count\n",
935 ba_resp->txed, ba_resp->txed_2_done);
937 * set txed_2_done = txed,
938 * so it won't impact rate scale
940 ba_resp->txed = ba_resp->txed_2_done;
942 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
943 ba_resp->txed, ba_resp->txed_2_done);
945 __skb_queue_head_init(&reclaimed_skbs);
947 /* Release all TFDs before the SSN, i.e. all TFDs in front of
948 * block-ack window (we assume that they've been successfully
949 * transmitted ... if not, it's too late anyway). */
950 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
953 while (!skb_queue_empty(&reclaimed_skbs)) {
955 skb = __skb_dequeue(&reclaimed_skbs);
956 hdr = (struct ieee80211_hdr *)skb->data;
958 if (ieee80211_is_data_qos(hdr->frame_control))
963 info = IEEE80211_SKB_CB(skb);
964 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
967 /* this is the first skb we deliver in this batch */
968 /* put the rate scaling data there */
969 info = IEEE80211_SKB_CB(skb);
970 memset(&info->status, 0, sizeof(info->status));
971 info->flags |= IEEE80211_TX_STAT_ACK;
972 info->flags |= IEEE80211_TX_STAT_AMPDU;
973 info->status.ampdu_ack_len = ba_resp->txed_2_done;
974 info->status.ampdu_len = ba_resp->txed;
975 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
979 ieee80211_tx_status_irqsafe(priv->hw, skb);
982 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);