Commit | Line | Data |
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b305a080 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
901069c7 | 5 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
b305a080 WYG |
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> | |
a0eaad71 | 34 | #include <linux/ieee80211.h> |
b305a080 WYG |
35 | |
36 | #include "iwl-dev.h" | |
37 | #include "iwl-core.h" | |
38 | #include "iwl-sta.h" | |
39 | #include "iwl-io.h" | |
74bcdb33 | 40 | #include "iwl-helpers.h" |
19e6cda0 | 41 | #include "iwl-agn-hw.h" |
8d801080 | 42 | #include "iwl-agn.h" |
47c1b496 | 43 | #include "iwl-trans.h" |
b305a080 | 44 | |
74bcdb33 WYG |
45 | /* |
46 | * mac80211 queues, ACs, hardware queues, FIFOs. | |
47 | * | |
48 | * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues | |
49 | * | |
50 | * Mac80211 uses the following numbers, which we get as from it | |
51 | * by way of skb_get_queue_mapping(skb): | |
52 | * | |
53 | * VO 0 | |
54 | * VI 1 | |
55 | * BE 2 | |
56 | * BK 3 | |
57 | * | |
58 | * | |
59 | * Regular (not A-MPDU) frames are put into hardware queues corresponding | |
60 | * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their | |
61 | * own queue per aggregation session (RA/TID combination), such queues are | |
62 | * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In | |
63 | * order to map frames to the right queue, we also need an AC->hw queue | |
64 | * mapping. This is implemented here. | |
65 | * | |
66 | * Due to the way hw queues are set up (by the hw specific modules like | |
67 | * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity | |
68 | * mapping. | |
69 | */ | |
70 | ||
71 | static const u8 tid_to_ac[] = { | |
0c4ac342 JB |
72 | IEEE80211_AC_BE, |
73 | IEEE80211_AC_BK, | |
74 | IEEE80211_AC_BK, | |
75 | IEEE80211_AC_BE, | |
76 | IEEE80211_AC_VI, | |
77 | IEEE80211_AC_VI, | |
78 | IEEE80211_AC_VO, | |
79 | IEEE80211_AC_VO | |
74bcdb33 WYG |
80 | }; |
81 | ||
c2845d01 SZ |
82 | static inline int get_ac_from_tid(u16 tid) |
83 | { | |
84 | if (likely(tid < ARRAY_SIZE(tid_to_ac))) | |
85 | return tid_to_ac[tid]; | |
86 | ||
87 | /* no support for TIDs 8-15 yet */ | |
88 | return -EINVAL; | |
89 | } | |
90 | ||
e72f368b | 91 | static inline int get_fifo_from_tid(struct iwl_rxon_context *ctx, u16 tid) |
74bcdb33 WYG |
92 | { |
93 | if (likely(tid < ARRAY_SIZE(tid_to_ac))) | |
e72f368b | 94 | return ctx->ac_to_fifo[tid_to_ac[tid]]; |
74bcdb33 WYG |
95 | |
96 | /* no support for TIDs 8-15 yet */ | |
97 | return -EINVAL; | |
98 | } | |
99 | ||
48d42c42 EG |
100 | static int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, int sta_id, |
101 | int tid) | |
b305a080 | 102 | { |
19e6cda0 | 103 | if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) || |
7cb1b088 WYG |
104 | (IWLAGN_FIRST_AMPDU_QUEUE + |
105 | priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) { | |
b305a080 WYG |
106 | IWL_WARN(priv, |
107 | "queue number out of range: %d, must be %d to %d\n", | |
19e6cda0 WYG |
108 | txq_id, IWLAGN_FIRST_AMPDU_QUEUE, |
109 | IWLAGN_FIRST_AMPDU_QUEUE + | |
7cb1b088 | 110 | priv->cfg->base_params->num_of_ampdu_queues - 1); |
b305a080 WYG |
111 | return -EINVAL; |
112 | } | |
113 | ||
b305a080 | 114 | /* Modify device's station table to Tx this TID */ |
c8823ec1 JB |
115 | return iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
116 | } | |
117 | ||
5c3d29fc DF |
118 | static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
119 | struct ieee80211_tx_info *info, | |
120 | __le16 fc, __le32 *tx_flags) | |
121 | { | |
122 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || | |
123 | info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || | |
124 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
125 | *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; | |
126 | } | |
127 | ||
74bcdb33 WYG |
128 | /* |
129 | * handle build REPLY_TX command notification. | |
130 | */ | |
131 | static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, | |
c6baf7fb JB |
132 | struct sk_buff *skb, |
133 | struct iwl_tx_cmd *tx_cmd, | |
134 | struct ieee80211_tx_info *info, | |
135 | struct ieee80211_hdr *hdr, u8 sta_id) | |
74bcdb33 WYG |
136 | { |
137 | __le16 fc = hdr->frame_control; | |
138 | __le32 tx_flags = tx_cmd->tx_flags; | |
139 | ||
140 | tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
2c2def10 JB |
141 | |
142 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
74bcdb33 | 143 | tx_flags |= TX_CMD_FLG_ACK_MSK; |
2c2def10 JB |
144 | else |
145 | tx_flags &= ~TX_CMD_FLG_ACK_MSK; | |
74bcdb33 | 146 | |
2c2def10 JB |
147 | if (ieee80211_is_probe_resp(fc)) |
148 | tx_flags |= TX_CMD_FLG_TSF_MSK; | |
149 | else if (ieee80211_is_back_req(fc)) | |
74bcdb33 | 150 | tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
d44ae69e | 151 | else if (info->band == IEEE80211_BAND_2GHZ && |
7cb1b088 WYG |
152 | priv->cfg->bt_params && |
153 | priv->cfg->bt_params->advanced_bt_coexist && | |
d44ae69e JB |
154 | (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
155 | ieee80211_is_reassoc_req(fc) || | |
156 | skb->protocol == cpu_to_be16(ETH_P_PAE))) | |
157 | tx_flags |= TX_CMD_FLG_IGNORE_BT; | |
74bcdb33 WYG |
158 | |
159 | ||
c6baf7fb | 160 | tx_cmd->sta_id = sta_id; |
74bcdb33 WYG |
161 | if (ieee80211_has_morefrags(fc)) |
162 | tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; | |
163 | ||
164 | if (ieee80211_is_data_qos(fc)) { | |
165 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
166 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
167 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; | |
168 | } else { | |
169 | tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; | |
170 | } | |
171 | ||
5c3d29fc | 172 | iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
74bcdb33 WYG |
173 | |
174 | tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); | |
175 | if (ieee80211_is_mgmt(fc)) { | |
176 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
177 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); | |
178 | else | |
179 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); | |
180 | } else { | |
181 | tx_cmd->timeout.pm_frame_timeout = 0; | |
182 | } | |
183 | ||
184 | tx_cmd->driver_txop = 0; | |
185 | tx_cmd->tx_flags = tx_flags; | |
186 | tx_cmd->next_frame_len = 0; | |
187 | } | |
188 | ||
189 | #define RTS_DFAULT_RETRY_LIMIT 60 | |
190 | ||
191 | static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, | |
c6baf7fb JB |
192 | struct iwl_tx_cmd *tx_cmd, |
193 | struct ieee80211_tx_info *info, | |
194 | __le16 fc) | |
74bcdb33 WYG |
195 | { |
196 | u32 rate_flags; | |
197 | int rate_idx; | |
198 | u8 rts_retry_limit; | |
199 | u8 data_retry_limit; | |
200 | u8 rate_plcp; | |
201 | ||
202 | /* Set retry limit on DATA packets and Probe Responses*/ | |
203 | if (ieee80211_is_probe_resp(fc)) | |
204 | data_retry_limit = 3; | |
205 | else | |
b744cb79 | 206 | data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; |
74bcdb33 WYG |
207 | tx_cmd->data_retry_limit = data_retry_limit; |
208 | ||
209 | /* Set retry limit on RTS packets */ | |
210 | rts_retry_limit = RTS_DFAULT_RETRY_LIMIT; | |
211 | if (data_retry_limit < rts_retry_limit) | |
212 | rts_retry_limit = data_retry_limit; | |
213 | tx_cmd->rts_retry_limit = rts_retry_limit; | |
214 | ||
215 | /* DATA packets will use the uCode station table for rate/antenna | |
216 | * selection */ | |
217 | if (ieee80211_is_data(fc)) { | |
218 | tx_cmd->initial_rate_index = 0; | |
219 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
c10e2c10 | 220 | #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL |
4e308119 WYG |
221 | if (priv->tm_fixed_rate) { |
222 | /* | |
223 | * rate overwrite by testmode | |
224 | * we not only send lq command to change rate | |
225 | * we also re-enforce per data pkt base. | |
226 | */ | |
227 | tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; | |
228 | memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, | |
229 | sizeof(tx_cmd->rate_n_flags)); | |
230 | } | |
c10e2c10 | 231 | #endif |
74bcdb33 WYG |
232 | return; |
233 | } | |
234 | ||
235 | /** | |
236 | * If the current TX rate stored in mac80211 has the MCS bit set, it's | |
237 | * not really a TX rate. Thus, we use the lowest supported rate for | |
238 | * this band. Also use the lowest supported rate if the stored rate | |
239 | * index is invalid. | |
240 | */ | |
241 | rate_idx = info->control.rates[0].idx; | |
242 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || | |
243 | (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) | |
244 | rate_idx = rate_lowest_index(&priv->bands[info->band], | |
245 | info->control.sta); | |
246 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
247 | if (info->band == IEEE80211_BAND_5GHZ) | |
248 | rate_idx += IWL_FIRST_OFDM_RATE; | |
249 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
250 | rate_plcp = iwl_rates[rate_idx].plcp; | |
251 | /* Zero out flags for this packet */ | |
252 | rate_flags = 0; | |
253 | ||
254 | /* Set CCK flag as needed */ | |
255 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
256 | rate_flags |= RATE_MCS_CCK_MSK; | |
257 | ||
74bcdb33 | 258 | /* Set up antennas */ |
7cb1b088 WYG |
259 | if (priv->cfg->bt_params && |
260 | priv->cfg->bt_params->advanced_bt_coexist && | |
261 | priv->bt_full_concurrent) { | |
bee008b7 WYG |
262 | /* operated as 1x1 in full concurrency mode */ |
263 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
d6189124 | 264 | first_antenna(hw_params(priv).valid_tx_ant)); |
bee008b7 WYG |
265 | } else |
266 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
d6189124 | 267 | hw_params(priv).valid_tx_ant); |
74bcdb33 WYG |
268 | rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
269 | ||
270 | /* Set the rate in the TX cmd */ | |
271 | tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); | |
272 | } | |
273 | ||
274 | static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, | |
275 | struct ieee80211_tx_info *info, | |
276 | struct iwl_tx_cmd *tx_cmd, | |
277 | struct sk_buff *skb_frag, | |
278 | int sta_id) | |
279 | { | |
280 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
281 | ||
97359d12 JB |
282 | switch (keyconf->cipher) { |
283 | case WLAN_CIPHER_SUITE_CCMP: | |
74bcdb33 WYG |
284 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
285 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
286 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
287 | tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; | |
288 | IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); | |
289 | break; | |
290 | ||
97359d12 | 291 | case WLAN_CIPHER_SUITE_TKIP: |
74bcdb33 | 292 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
523b02ea | 293 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
74bcdb33 WYG |
294 | IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); |
295 | break; | |
296 | ||
97359d12 JB |
297 | case WLAN_CIPHER_SUITE_WEP104: |
298 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
299 | /* fall through */ | |
300 | case WLAN_CIPHER_SUITE_WEP40: | |
74bcdb33 WYG |
301 | tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | |
302 | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); | |
303 | ||
74bcdb33 WYG |
304 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
305 | ||
306 | IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " | |
307 | "with key %d\n", keyconf->keyidx); | |
308 | break; | |
309 | ||
310 | default: | |
97359d12 | 311 | IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
74bcdb33 WYG |
312 | break; |
313 | } | |
314 | } | |
315 | ||
316 | /* | |
317 | * start REPLY_TX command process | |
318 | */ | |
319 | int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) | |
320 | { | |
321 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
322 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
74bcdb33 | 323 | struct iwl_station_priv *sta_priv = NULL; |
a194e324 | 324 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
47c1b496 | 325 | struct iwl_tx_cmd *tx_cmd; |
8d56396a | 326 | int txq_id; |
47c1b496 | 327 | |
74bcdb33 WYG |
328 | u16 seq_number = 0; |
329 | __le16 fc; | |
330 | u8 hdr_len; | |
47c1b496 | 331 | u16 len; |
74bcdb33 | 332 | u8 sta_id; |
74bcdb33 | 333 | u8 tid = 0; |
74bcdb33 | 334 | unsigned long flags; |
2e34034e | 335 | bool is_agg = false; |
74bcdb33 | 336 | |
c6baf7fb | 337 | if (info->control.vif) |
a194e324 JB |
338 | ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
339 | ||
10b15e6f | 340 | spin_lock_irqsave(&priv->shrd->lock, flags); |
74bcdb33 WYG |
341 | if (iwl_is_rfkill(priv)) { |
342 | IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); | |
2c46f72e | 343 | goto drop_unlock_priv; |
74bcdb33 WYG |
344 | } |
345 | ||
346 | fc = hdr->frame_control; | |
347 | ||
348 | #ifdef CONFIG_IWLWIFI_DEBUG | |
349 | if (ieee80211_is_auth(fc)) | |
350 | IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); | |
351 | else if (ieee80211_is_assoc_req(fc)) | |
352 | IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); | |
353 | else if (ieee80211_is_reassoc_req(fc)) | |
354 | IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); | |
355 | #endif | |
356 | ||
357 | hdr_len = ieee80211_hdrlen(fc); | |
358 | ||
bfd36103 SG |
359 | /* For management frames use broadcast id to do not break aggregation */ |
360 | if (!ieee80211_is_data(fc)) | |
361 | sta_id = ctx->bcast_sta_id; | |
362 | else { | |
363 | /* Find index into station table for destination station */ | |
364 | sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta); | |
365 | if (sta_id == IWL_INVALID_STATION) { | |
366 | IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", | |
367 | hdr->addr1); | |
e00cf3b9 | 368 | goto drop_unlock_priv; |
bfd36103 | 369 | } |
74bcdb33 WYG |
370 | } |
371 | ||
372 | IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); | |
373 | ||
47c1b496 EG |
374 | if (info->control.sta) |
375 | sta_priv = (void *)info->control.sta->drv_priv; | |
74bcdb33 | 376 | |
67158b67 JB |
377 | if (sta_priv && sta_priv->asleep && |
378 | (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) { | |
74bcdb33 WYG |
379 | /* |
380 | * This sends an asynchronous command to the device, | |
381 | * but we can rely on it being processed before the | |
382 | * next frame is processed -- and the next frame to | |
383 | * this station is the one that will consume this | |
384 | * counter. | |
385 | * For now set the counter to just 1 since we do not | |
386 | * support uAPSD yet. | |
387 | */ | |
388 | iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); | |
389 | } | |
390 | ||
e72f368b JB |
391 | /* |
392 | * Send this frame after DTIM -- there's a special queue | |
393 | * reserved for this for contexts that support AP mode. | |
394 | */ | |
395 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { | |
396 | txq_id = ctx->mcast_queue; | |
397 | /* | |
398 | * The microcode will clear the more data | |
399 | * bit in the last frame it transmits. | |
400 | */ | |
401 | hdr->frame_control |= | |
402 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
c6baf7fb JB |
403 | } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) |
404 | txq_id = IWL_AUX_QUEUE; | |
405 | else | |
e72f368b | 406 | txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)]; |
9c5ac091 | 407 | |
10b15e6f | 408 | /* irqs already disabled/saved above when locking priv->shrd->lock */ |
f39c95e8 | 409 | spin_lock(&priv->shrd->sta_lock); |
9c5ac091 | 410 | |
74bcdb33 | 411 | if (ieee80211_is_data_qos(fc)) { |
47c1b496 | 412 | u8 *qc = NULL; |
74bcdb33 WYG |
413 | qc = ieee80211_get_qos_ctl(hdr); |
414 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
2c46f72e JB |
415 | |
416 | if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) | |
417 | goto drop_unlock_sta; | |
418 | ||
74bcdb33 WYG |
419 | seq_number = priv->stations[sta_id].tid[tid].seq_number; |
420 | seq_number &= IEEE80211_SCTL_SEQ; | |
421 | hdr->seq_ctrl = hdr->seq_ctrl & | |
422 | cpu_to_le16(IEEE80211_SCTL_FRAG); | |
423 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
424 | seq_number += 0x10; | |
425 | /* aggregation is on for this <sta,tid> */ | |
426 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
427 | priv->stations[sta_id].tid[tid].agg.state == IWL_AGG_ON) { | |
428 | txq_id = priv->stations[sta_id].tid[tid].agg.txq_id; | |
2e34034e | 429 | is_agg = true; |
74bcdb33 WYG |
430 | } |
431 | } | |
432 | ||
e6bb4c9c | 433 | tx_cmd = iwl_trans_get_tx_cmd(trans(priv), txq_id); |
47c1b496 | 434 | if (unlikely(!tx_cmd)) |
2c46f72e | 435 | goto drop_unlock_sta; |
74bcdb33 | 436 | |
74bcdb33 WYG |
437 | /* Copy MAC header from skb into command buffer */ |
438 | memcpy(tx_cmd->hdr, hdr, hdr_len); | |
439 | ||
74bcdb33 WYG |
440 | /* Total # bytes to be transmitted */ |
441 | len = (u16)skb->len; | |
442 | tx_cmd->len = cpu_to_le16(len); | |
443 | ||
444 | if (info->control.hw_key) | |
445 | iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); | |
446 | ||
447 | /* TODO need this for burst mode later on */ | |
d44ae69e | 448 | iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
74bcdb33 WYG |
449 | iwl_dbg_log_tx_data_frame(priv, len, hdr); |
450 | ||
451 | iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); | |
452 | ||
453 | iwl_update_stats(priv, true, fc, len); | |
74bcdb33 | 454 | |
e6bb4c9c | 455 | if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg, ctx)) |
47c1b496 | 456 | goto drop_unlock_sta; |
2c46f72e JB |
457 | |
458 | if (ieee80211_is_data_qos(fc)) { | |
459 | priv->stations[sta_id].tid[tid].tfds_in_queue++; | |
460 | if (!ieee80211_has_morefrags(fc)) | |
461 | priv->stations[sta_id].tid[tid].seq_number = seq_number; | |
462 | } | |
463 | ||
f39c95e8 | 464 | spin_unlock(&priv->shrd->sta_lock); |
10b15e6f | 465 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
74bcdb33 | 466 | |
2e34034e JB |
467 | /* |
468 | * Avoid atomic ops if it isn't an associated client. | |
469 | * Also, if this is a packet for aggregation, don't | |
470 | * increase the counter because the ucode will stop | |
471 | * aggregation queues when their respective station | |
472 | * goes to sleep. | |
473 | */ | |
474 | if (sta_priv && sta_priv->client && !is_agg) | |
74bcdb33 WYG |
475 | atomic_inc(&sta_priv->pending_frames); |
476 | ||
74bcdb33 WYG |
477 | return 0; |
478 | ||
2c46f72e | 479 | drop_unlock_sta: |
f39c95e8 | 480 | spin_unlock(&priv->shrd->sta_lock); |
2c46f72e | 481 | drop_unlock_priv: |
10b15e6f | 482 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
74bcdb33 WYG |
483 | return -1; |
484 | } | |
485 | ||
74bcdb33 WYG |
486 | /* |
487 | * Find first available (lowest unused) Tx Queue, mark it "active". | |
488 | * Called only when finding queue for aggregation. | |
489 | * Should never return anything < 7, because they should already | |
490 | * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) | |
491 | */ | |
492 | static int iwlagn_txq_ctx_activate_free(struct iwl_priv *priv) | |
493 | { | |
494 | int txq_id; | |
495 | ||
d6189124 | 496 | for (txq_id = 0; txq_id < hw_params(priv).max_txq_num; txq_id++) |
74bcdb33 WYG |
497 | if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) |
498 | return txq_id; | |
499 | return -1; | |
500 | } | |
501 | ||
832f47e3 | 502 | int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 503 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
74bcdb33 WYG |
504 | { |
505 | int sta_id; | |
506 | int tx_fifo; | |
507 | int txq_id; | |
508 | int ret; | |
509 | unsigned long flags; | |
510 | struct iwl_tid_data *tid_data; | |
511 | ||
e72f368b | 512 | tx_fifo = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid); |
74bcdb33 WYG |
513 | if (unlikely(tx_fifo < 0)) |
514 | return tx_fifo; | |
515 | ||
5bc9890f WYG |
516 | IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
517 | sta->addr, tid); | |
74bcdb33 | 518 | |
619753ff | 519 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
520 | if (sta_id == IWL_INVALID_STATION) { |
521 | IWL_ERR(priv, "Start AGG on invalid station\n"); | |
522 | return -ENXIO; | |
523 | } | |
524 | if (unlikely(tid >= MAX_TID_COUNT)) | |
525 | return -EINVAL; | |
526 | ||
527 | if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { | |
528 | IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); | |
529 | return -ENXIO; | |
530 | } | |
531 | ||
532 | txq_id = iwlagn_txq_ctx_activate_free(priv); | |
533 | if (txq_id == -1) { | |
534 | IWL_ERR(priv, "No free aggregation queue available\n"); | |
535 | return -ENXIO; | |
536 | } | |
537 | ||
f39c95e8 | 538 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
74bcdb33 WYG |
539 | tid_data = &priv->stations[sta_id].tid[tid]; |
540 | *ssn = SEQ_TO_SN(tid_data->seq_number); | |
541 | tid_data->agg.txq_id = txq_id; | |
c8823ec1 | 542 | tid_data->agg.tx_fifo = tx_fifo; |
ea9b307f | 543 | iwl_set_swq_id(&priv->txq[txq_id], get_ac_from_tid(tid), txq_id); |
f39c95e8 | 544 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
74bcdb33 | 545 | |
c8823ec1 | 546 | ret = iwlagn_txq_agg_enable(priv, txq_id, sta_id, tid); |
74bcdb33 WYG |
547 | if (ret) |
548 | return ret; | |
549 | ||
f39c95e8 | 550 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
9c5ac091 | 551 | tid_data = &priv->stations[sta_id].tid[tid]; |
74bcdb33 WYG |
552 | if (tid_data->tfds_in_queue == 0) { |
553 | IWL_DEBUG_HT(priv, "HW queue is empty\n"); | |
554 | tid_data->agg.state = IWL_AGG_ON; | |
619753ff | 555 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
74bcdb33 WYG |
556 | } else { |
557 | IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n", | |
558 | tid_data->tfds_in_queue); | |
559 | tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
560 | } | |
f39c95e8 | 561 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
74bcdb33 WYG |
562 | return ret; |
563 | } | |
564 | ||
832f47e3 | 565 | int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 566 | struct ieee80211_sta *sta, u16 tid) |
74bcdb33 | 567 | { |
18c121d7 | 568 | int tx_fifo_id, txq_id, sta_id, ssn; |
74bcdb33 WYG |
569 | struct iwl_tid_data *tid_data; |
570 | int write_ptr, read_ptr; | |
571 | unsigned long flags; | |
572 | ||
e72f368b | 573 | tx_fifo_id = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid); |
74bcdb33 WYG |
574 | if (unlikely(tx_fifo_id < 0)) |
575 | return tx_fifo_id; | |
576 | ||
619753ff | 577 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
578 | |
579 | if (sta_id == IWL_INVALID_STATION) { | |
580 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); | |
581 | return -ENXIO; | |
582 | } | |
583 | ||
f39c95e8 | 584 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
9c5ac091 | 585 | |
74bcdb33 WYG |
586 | tid_data = &priv->stations[sta_id].tid[tid]; |
587 | ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; | |
588 | txq_id = tid_data->agg.txq_id; | |
18c121d7 JB |
589 | |
590 | switch (priv->stations[sta_id].tid[tid].agg.state) { | |
591 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
592 | /* | |
593 | * This can happen if the peer stops aggregation | |
594 | * again before we've had a chance to drain the | |
595 | * queue we selected previously, i.e. before the | |
596 | * session was really started completely. | |
597 | */ | |
598 | IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); | |
599 | goto turn_off; | |
600 | case IWL_AGG_ON: | |
601 | break; | |
602 | default: | |
603 | IWL_WARN(priv, "Stopping AGG while state not ON or starting\n"); | |
604 | } | |
605 | ||
74bcdb33 WYG |
606 | write_ptr = priv->txq[txq_id].q.write_ptr; |
607 | read_ptr = priv->txq[txq_id].q.read_ptr; | |
608 | ||
609 | /* The queue is not empty */ | |
610 | if (write_ptr != read_ptr) { | |
611 | IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n"); | |
612 | priv->stations[sta_id].tid[tid].agg.state = | |
613 | IWL_EMPTYING_HW_QUEUE_DELBA; | |
f39c95e8 | 614 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
74bcdb33 WYG |
615 | return 0; |
616 | } | |
617 | ||
618 | IWL_DEBUG_HT(priv, "HW queue is empty\n"); | |
18c121d7 | 619 | turn_off: |
74bcdb33 WYG |
620 | priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; |
621 | ||
9c5ac091 | 622 | /* do not restore/save irqs */ |
f39c95e8 | 623 | spin_unlock(&priv->shrd->sta_lock); |
10b15e6f | 624 | spin_lock(&priv->shrd->lock); |
9c5ac091 | 625 | |
74bcdb33 WYG |
626 | /* |
627 | * the only reason this call can fail is queue number out of range, | |
628 | * which can happen if uCode is reloaded and all the station | |
629 | * information are lost. if it is outside the range, there is no need | |
630 | * to deactivate the uCode queue, just return "success" to allow | |
631 | * mac80211 to clean up it own data. | |
632 | */ | |
e6bb4c9c | 633 | iwl_trans_txq_agg_disable(trans(priv), txq_id, ssn, tx_fifo_id); |
10b15e6f | 634 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
74bcdb33 | 635 | |
619753ff | 636 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
74bcdb33 WYG |
637 | |
638 | return 0; | |
639 | } | |
640 | ||
641 | int iwlagn_txq_check_empty(struct iwl_priv *priv, | |
642 | int sta_id, u8 tid, int txq_id) | |
643 | { | |
644 | struct iwl_queue *q = &priv->txq[txq_id].q; | |
645 | u8 *addr = priv->stations[sta_id].sta.sta.addr; | |
646 | struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; | |
8bd413e6 JB |
647 | struct iwl_rxon_context *ctx; |
648 | ||
649 | ctx = &priv->contexts[priv->stations[sta_id].ctxid]; | |
74bcdb33 | 650 | |
f39c95e8 | 651 | lockdep_assert_held(&priv->shrd->sta_lock); |
9c5ac091 | 652 | |
74bcdb33 WYG |
653 | switch (priv->stations[sta_id].tid[tid].agg.state) { |
654 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
655 | /* We are reclaiming the last packet of the */ | |
656 | /* aggregated HW queue */ | |
657 | if ((txq_id == tid_data->agg.txq_id) && | |
658 | (q->read_ptr == q->write_ptr)) { | |
659 | u16 ssn = SEQ_TO_SN(tid_data->seq_number); | |
e72f368b | 660 | int tx_fifo = get_fifo_from_tid(ctx, tid); |
74bcdb33 | 661 | IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n"); |
e6bb4c9c | 662 | iwl_trans_txq_agg_disable(trans(priv), txq_id, |
41c50542 | 663 | ssn, tx_fifo); |
74bcdb33 | 664 | tid_data->agg.state = IWL_AGG_OFF; |
8bd413e6 | 665 | ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid); |
74bcdb33 WYG |
666 | } |
667 | break; | |
668 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
669 | /* We are reclaiming the last packet of the queue */ | |
670 | if (tid_data->tfds_in_queue == 0) { | |
671 | IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n"); | |
672 | tid_data->agg.state = IWL_AGG_ON; | |
8bd413e6 | 673 | ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid); |
74bcdb33 WYG |
674 | } |
675 | break; | |
676 | } | |
9c5ac091 | 677 | |
74bcdb33 WYG |
678 | return 0; |
679 | } | |
680 | ||
2e34034e JB |
681 | static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
682 | struct iwl_rxon_context *ctx, | |
683 | const u8 *addr1) | |
74bcdb33 | 684 | { |
74bcdb33 WYG |
685 | struct ieee80211_sta *sta; |
686 | struct iwl_station_priv *sta_priv; | |
687 | ||
6db6340c | 688 | rcu_read_lock(); |
2e34034e | 689 | sta = ieee80211_find_sta(ctx->vif, addr1); |
74bcdb33 WYG |
690 | if (sta) { |
691 | sta_priv = (void *)sta->drv_priv; | |
692 | /* avoid atomic ops if this isn't a client */ | |
693 | if (sta_priv->client && | |
694 | atomic_dec_return(&sta_priv->pending_frames) == 0) | |
695 | ieee80211_sta_block_awake(priv->hw, sta, false); | |
696 | } | |
6db6340c | 697 | rcu_read_unlock(); |
2e34034e JB |
698 | } |
699 | ||
a0eaad71 EG |
700 | /** |
701 | * translate ucode response to mac80211 tx status control values | |
702 | */ | |
703 | void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, | |
704 | struct ieee80211_tx_info *info) | |
2e34034e | 705 | { |
a0eaad71 | 706 | struct ieee80211_tx_rate *r = &info->control.rates[0]; |
74bcdb33 | 707 | |
a0eaad71 EG |
708 | info->antenna_sel_tx = |
709 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
710 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
711 | r->flags |= IEEE80211_TX_RC_MCS; | |
712 | if (rate_n_flags & RATE_MCS_GF_MSK) | |
713 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
714 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
715 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
716 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
717 | r->flags |= IEEE80211_TX_RC_DUP_DATA; | |
718 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
719 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
720 | r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); | |
74bcdb33 WYG |
721 | } |
722 | ||
a0eaad71 EG |
723 | #ifdef CONFIG_IWLWIFI_DEBUG |
724 | const char *iwl_get_tx_fail_reason(u32 status) | |
74bcdb33 | 725 | { |
a0eaad71 EG |
726 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x |
727 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
74bcdb33 | 728 | |
a0eaad71 EG |
729 | switch (status & TX_STATUS_MSK) { |
730 | case TX_STATUS_SUCCESS: | |
731 | return "SUCCESS"; | |
732 | TX_STATUS_POSTPONE(DELAY); | |
733 | TX_STATUS_POSTPONE(FEW_BYTES); | |
734 | TX_STATUS_POSTPONE(BT_PRIO); | |
735 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
736 | TX_STATUS_POSTPONE(CALC_TTAK); | |
737 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
738 | TX_STATUS_FAIL(SHORT_LIMIT); | |
739 | TX_STATUS_FAIL(LONG_LIMIT); | |
740 | TX_STATUS_FAIL(FIFO_UNDERRUN); | |
741 | TX_STATUS_FAIL(DRAIN_FLOW); | |
742 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
743 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
744 | TX_STATUS_FAIL(DEST_PS); | |
745 | TX_STATUS_FAIL(HOST_ABORTED); | |
746 | TX_STATUS_FAIL(BT_RETRY); | |
747 | TX_STATUS_FAIL(STA_INVALID); | |
748 | TX_STATUS_FAIL(FRAG_DROPPED); | |
749 | TX_STATUS_FAIL(TID_DISABLE); | |
750 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
751 | TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); | |
752 | TX_STATUS_FAIL(PASSIVE_NO_RX); | |
753 | TX_STATUS_FAIL(NO_BEACON_ON_RADAR); | |
74bcdb33 WYG |
754 | } |
755 | ||
a0eaad71 | 756 | return "UNKNOWN"; |
74bcdb33 | 757 | |
a0eaad71 EG |
758 | #undef TX_STATUS_FAIL |
759 | #undef TX_STATUS_POSTPONE | |
760 | } | |
761 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
b2502698 | 762 | |
a0eaad71 EG |
763 | static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, |
764 | struct iwlagn_tx_resp *tx_resp) | |
765 | { | |
766 | struct agg_tx_status *frame_status = &tx_resp->status; | |
767 | int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> | |
768 | IWLAGN_TX_RES_TID_POS; | |
769 | int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
770 | IWLAGN_TX_RES_RA_POS; | |
771 | struct iwl_ht_agg *agg = &priv->stations[sta_id].tid[tid].agg; | |
772 | u32 status = le16_to_cpu(tx_resp->status.status); | |
773 | int i; | |
774 | ||
775 | if (agg->wait_for_ba) | |
776 | IWL_DEBUG_TX_REPLY(priv, | |
777 | "got tx response w/o block-ack\n"); | |
74bcdb33 | 778 | |
a0eaad71 EG |
779 | agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); |
780 | agg->wait_for_ba = (tx_resp->frame_count > 1); | |
781 | ||
782 | /* | |
783 | * If the BT kill count is non-zero, we'll get this | |
784 | * notification again. | |
785 | */ | |
786 | if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && | |
787 | priv->cfg->bt_params && | |
788 | priv->cfg->bt_params->advanced_bt_coexist) { | |
789 | IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); | |
790 | } | |
b2502698 | 791 | |
a0eaad71 EG |
792 | /* Construct bit-map of pending frames within Tx window */ |
793 | for (i = 0; i < tx_resp->frame_count; i++) { | |
794 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
74bcdb33 | 795 | |
a0eaad71 EG |
796 | if (status & AGG_TX_STATUS_MSK) |
797 | iwlagn_count_agg_tx_err_status(priv, fstatus); | |
74bcdb33 | 798 | |
a0eaad71 EG |
799 | if (status & (AGG_TX_STATE_FEW_BYTES_MSK | |
800 | AGG_TX_STATE_ABORT_MSK)) | |
801 | continue; | |
802 | ||
803 | IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " | |
804 | "try-count (0x%08x)\n", | |
805 | iwl_get_agg_tx_fail_reason(fstatus), | |
806 | fstatus & AGG_TX_STATUS_MSK, | |
807 | fstatus & AGG_TX_TRY_MSK); | |
74bcdb33 | 808 | } |
74bcdb33 WYG |
809 | } |
810 | ||
a0eaad71 EG |
811 | static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) |
812 | { | |
813 | return le32_to_cpup((__le32 *)&tx_resp->status + | |
814 | tx_resp->frame_count) & MAX_SN; | |
815 | } | |
74bcdb33 | 816 | |
a0eaad71 | 817 | void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) |
74bcdb33 | 818 | { |
a0eaad71 EG |
819 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
820 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
821 | int txq_id = SEQ_TO_QUEUE(sequence); | |
822 | int cmd_index = SEQ_TO_INDEX(sequence); | |
823 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; | |
824 | struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; | |
825 | struct ieee80211_hdr *hdr; | |
826 | u32 status = le16_to_cpu(tx_resp->status.status); | |
827 | u32 ssn = iwlagn_get_scd_ssn(tx_resp); | |
828 | int tid; | |
829 | int sta_id; | |
830 | int freed; | |
74bcdb33 | 831 | struct ieee80211_tx_info *info; |
a0eaad71 EG |
832 | unsigned long flags; |
833 | struct sk_buff_head skbs; | |
834 | struct sk_buff *skb; | |
835 | struct iwl_rxon_context *ctx; | |
74bcdb33 | 836 | |
a0eaad71 EG |
837 | if ((cmd_index >= txq->q.n_bd) || |
838 | (iwl_queue_used(&txq->q, cmd_index) == 0)) { | |
839 | IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) " | |
840 | "cmd_index %d is out of range [0-%d] %d %d\n", | |
841 | __func__, txq_id, cmd_index, txq->q.n_bd, | |
842 | txq->q.write_ptr, txq->q.read_ptr); | |
843 | return; | |
74bcdb33 WYG |
844 | } |
845 | ||
a0eaad71 | 846 | txq->time_stamp = jiffies; |
d0eb6334 | 847 | |
a0eaad71 EG |
848 | tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
849 | IWLAGN_TX_RES_TID_POS; | |
850 | sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
851 | IWLAGN_TX_RES_RA_POS; | |
9decde95 | 852 | |
a0eaad71 | 853 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
9decde95 | 854 | |
a0eaad71 EG |
855 | if (txq->sched_retry) |
856 | iwl_rx_reply_tx_agg(priv, tx_resp); | |
857 | ||
858 | if (tx_resp->frame_count == 1) { | |
859 | bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); | |
860 | ||
861 | __skb_queue_head_init(&skbs); | |
862 | /*we can free until ssn % q.n_bd not inclusive */ | |
863 | iwl_trans_reclaim(trans(priv), txq_id, ssn, status, &skbs); | |
864 | freed = 0; | |
865 | while (!skb_queue_empty(&skbs)) { | |
866 | skb = __skb_dequeue(&skbs); | |
867 | hdr = (struct ieee80211_hdr *)skb->data; | |
868 | ||
869 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
870 | priv->last_seq_ctl = tx_resp->seq_ctl; | |
871 | ||
872 | info = IEEE80211_SKB_CB(skb); | |
873 | ctx = info->driver_data[0]; | |
874 | ||
875 | memset(&info->status, 0, sizeof(info->status)); | |
876 | ||
877 | if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && | |
878 | iwl_is_associated_ctx(ctx) && ctx->vif && | |
879 | ctx->vif->type == NL80211_IFTYPE_STATION) { | |
880 | ctx->last_tx_rejected = true; | |
881 | iwl_stop_queue(priv, &priv->txq[txq_id]); | |
882 | ||
883 | IWL_DEBUG_TX_REPLY(priv, | |
884 | "TXQ %d status %s (0x%08x) " | |
885 | "rate_n_flags 0x%x retries %d\n", | |
886 | txq_id, | |
887 | iwl_get_tx_fail_reason(status), | |
888 | status, | |
889 | le32_to_cpu(tx_resp->rate_n_flags), | |
890 | tx_resp->failure_frame); | |
891 | ||
892 | IWL_DEBUG_TX_REPLY(priv, | |
893 | "FrameCnt = %d, idx=%d\n", | |
894 | tx_resp->frame_count, cmd_index); | |
895 | } | |
896 | ||
897 | /* check if BAR is needed */ | |
898 | if (is_agg && !iwl_is_tx_success(status)) | |
899 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
900 | iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), | |
901 | tx_resp, is_agg); | |
902 | if (!is_agg) | |
903 | iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); | |
904 | ||
905 | ieee80211_tx_status_irqsafe(priv->hw, skb); | |
906 | ||
907 | freed++; | |
908 | } | |
74bcdb33 | 909 | |
a0eaad71 | 910 | WARN_ON(!is_agg && freed != 1); |
74bcdb33 | 911 | |
a0eaad71 EG |
912 | iwl_free_tfds_in_queue(priv, sta_id, tid, freed); |
913 | iwlagn_txq_check_empty(priv, sta_id, tid, txq_id); | |
914 | } | |
8d801080 | 915 | |
a0eaad71 EG |
916 | iwl_check_abort_status(priv, tx_resp->frame_count, status); |
917 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | |
8d801080 WYG |
918 | } |
919 | ||
74bcdb33 WYG |
920 | /** |
921 | * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA | |
922 | * | |
923 | * Handles block-acknowledge notification from device, which reports success | |
924 | * of frames sent via aggregation. | |
925 | */ | |
926 | void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, | |
927 | struct iwl_rx_mem_buffer *rxb) | |
928 | { | |
929 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
930 | struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; | |
931 | struct iwl_tx_queue *txq = NULL; | |
932 | struct iwl_ht_agg *agg; | |
a0eaad71 EG |
933 | struct sk_buff_head reclaimed_skbs; |
934 | struct ieee80211_tx_info *info; | |
935 | struct ieee80211_hdr *hdr; | |
936 | struct sk_buff *skb; | |
937 | unsigned long flags; | |
74bcdb33 WYG |
938 | int index; |
939 | int sta_id; | |
940 | int tid; | |
a0eaad71 | 941 | int freed; |
74bcdb33 WYG |
942 | |
943 | /* "flow" corresponds to Tx queue */ | |
944 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
945 | ||
946 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
947 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
948 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); | |
949 | ||
d6189124 | 950 | if (scd_flow >= hw_params(priv).max_txq_num) { |
74bcdb33 WYG |
951 | IWL_ERR(priv, |
952 | "BUG_ON scd_flow is bigger than number of queues\n"); | |
953 | return; | |
954 | } | |
955 | ||
956 | txq = &priv->txq[scd_flow]; | |
957 | sta_id = ba_resp->sta_id; | |
958 | tid = ba_resp->tid; | |
959 | agg = &priv->stations[sta_id].tid[tid].agg; | |
a0eaad71 EG |
960 | |
961 | /* Find index of block-ack window */ | |
962 | index = ba_resp_scd_ssn & (txq->q.n_bd - 1); | |
963 | ||
964 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | |
965 | ||
b561e827 | 966 | if (unlikely(agg->txq_id != scd_flow)) { |
735df29a WYG |
967 | /* |
968 | * FIXME: this is a uCode bug which need to be addressed, | |
969 | * log the information and return for now! | |
970 | * since it is possible happen very often and in order | |
971 | * not to fill the syslog, don't enable the logging by default | |
972 | */ | |
973 | IWL_DEBUG_TX_REPLY(priv, | |
974 | "BA scd_flow %d does not match txq_id %d\n", | |
b561e827 | 975 | scd_flow, agg->txq_id); |
a0eaad71 | 976 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
b561e827 SZ |
977 | return; |
978 | } | |
74bcdb33 | 979 | |
a0eaad71 EG |
980 | if (unlikely(!agg->wait_for_ba)) { |
981 | if (unlikely(ba_resp->bitmap)) | |
982 | IWL_ERR(priv, "Received BA when not expected\n"); | |
983 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | |
984 | return; | |
985 | } | |
74bcdb33 WYG |
986 | |
987 | IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " | |
988 | "sta_id = %d\n", | |
989 | agg->wait_for_ba, | |
990 | (u8 *) &ba_resp->sta_addr_lo32, | |
991 | ba_resp->sta_id); | |
a0eaad71 EG |
992 | IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " |
993 | "scd_flow = %d, scd_ssn = %d\n", | |
74bcdb33 WYG |
994 | ba_resp->tid, |
995 | ba_resp->seq_ctl, | |
996 | (unsigned long long)le64_to_cpu(ba_resp->bitmap), | |
997 | ba_resp->scd_flow, | |
998 | ba_resp->scd_ssn); | |
74bcdb33 | 999 | |
a0eaad71 EG |
1000 | /* Mark that the expected block-ack response arrived */ |
1001 | agg->wait_for_ba = 0; | |
1002 | ||
1003 | /* Sanity check values reported by uCode */ | |
1004 | if (ba_resp->txed_2_done > ba_resp->txed) { | |
1005 | IWL_DEBUG_TX_REPLY(priv, | |
1006 | "bogus sent(%d) and ack(%d) count\n", | |
1007 | ba_resp->txed, ba_resp->txed_2_done); | |
1008 | /* | |
1009 | * set txed_2_done = txed, | |
1010 | * so it won't impact rate scale | |
1011 | */ | |
1012 | ba_resp->txed = ba_resp->txed_2_done; | |
1013 | } | |
1014 | IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n", | |
1015 | ba_resp->txed, ba_resp->txed_2_done); | |
1016 | ||
1017 | __skb_queue_head_init(&reclaimed_skbs); | |
74bcdb33 WYG |
1018 | |
1019 | /* Release all TFDs before the SSN, i.e. all TFDs in front of | |
1020 | * block-ack window (we assume that they've been successfully | |
1021 | * transmitted ... if not, it's too late anyway). */ | |
a0eaad71 EG |
1022 | iwl_trans_reclaim(trans(priv), scd_flow, ba_resp_scd_ssn, 0, |
1023 | &reclaimed_skbs); | |
1024 | freed = 0; | |
1025 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
74bcdb33 | 1026 | |
a0eaad71 EG |
1027 | skb = __skb_dequeue(&reclaimed_skbs); |
1028 | hdr = (struct ieee80211_hdr *)skb->data; | |
69fdb710 | 1029 | |
a0eaad71 EG |
1030 | if (ieee80211_is_data_qos(hdr->frame_control)) |
1031 | freed++; | |
1032 | else | |
1033 | WARN_ON_ONCE(1); | |
1034 | ||
1035 | if (freed == 0) { | |
1036 | /* this is the first skb we deliver in this batch */ | |
1037 | /* put the rate scaling data there */ | |
1038 | info = IEEE80211_SKB_CB(skb); | |
1039 | memset(&info->status, 0, sizeof(info->status)); | |
1040 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1041 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
1042 | info->status.ampdu_ack_len = ba_resp->txed_2_done; | |
1043 | info->status.ampdu_len = ba_resp->txed; | |
1044 | iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, | |
1045 | info); | |
1046 | } | |
69fdb710 | 1047 | |
a0eaad71 | 1048 | ieee80211_tx_status_irqsafe(priv->hw, skb); |
69fdb710 JB |
1049 | } |
1050 | ||
a0eaad71 EG |
1051 | iwl_free_tfds_in_queue(priv, sta_id, tid, freed); |
1052 | iwlagn_txq_check_empty(priv, sta_id, tid, scd_flow); | |
69fdb710 | 1053 | |
a0eaad71 | 1054 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
69fdb710 | 1055 | } |